Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann: "These are changes for drivers that are intimately tied to some SoC and for some reason could not get merged through the respective subsystem maintainer tree. The largest single change here this time around is the Tegra iommu/memory controller driver, which gets updated to the new iommu DT binding. More drivers like this are likely to follow for the following merge window, but we should be able to do those through the iommu maintainer. Other notable changes are: - reset controller drivers from the reset maintainer (socfpga, sti, berlin) - fixes for the keystone navigator driver merged last time - at91 rtc driver changes related to the at91 cleanups - ARM perf driver changes from Will Deacon - updates for the brcmstb_gisb driver" * tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (53 commits) clocksource: arch_timer: Allow the device tree to specify uninitialized timer registers clocksource: arch_timer: Fix code to use physical timers when requested memory: Add NVIDIA Tegra memory controller support bus: brcmstb_gisb: Add register offset tables for older chips bus: brcmstb_gisb: Look up register offsets in a table bus: brcmstb_gisb: Introduce wrapper functions for MMIO accesses bus: brcmstb_gisb: Make the driver buildable on MIPS of: Add NVIDIA Tegra memory controller binding ARM: tegra: Move AHB Kconfig to drivers/amba amba: Add Kconfig file clk: tegra: Implement memory-controller clock serial: samsung: Fix serial config dependencies for exynos7 bus: brcmstb_gisb: resolve section mismatch ARM: common: edma: edma_pm_resume may be unused ARM: common: edma: add suspend resume hook powerpc/iommu: Rename iommu_[un]map_sg functions rtc: at91sam9: add DT bindings documentation rtc: at91sam9: use clk API instead of relying on AT91_SLOW_CLOCK ARM: at91: add clk_lookup entry for RTT devices rtc: at91sam9: rework the Kconfig description ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2014-12-09 17:48:22 -0500
committer: Linus Torvalds <torvalds@linux-foundation.org> 2014-12-09 17:48:22 -0500
commit: 3a647c1d7ab08145cee4b650f5e797d168846c51 (patch)
tree: 6fcbc8ad1fc69b5a99214e22f6084452bdf0131c
parent: 6cd94d5e57ab97ddd672b707ab4bb639672c1727 (diff)
parent: 5db45002576f7d60c5bf7b23e277845cd3e806be (diff)
83 files changed, 5846 insertions, 2010 deletions
diff --git a/Documentation/devicetree/bindings/arm/arch_timer.txt b/Documentation/devicetree/bindings/arm/arch_timer.txt
index 37b2cafa4e52..256b4d8bab7b 100644
--- a/Documentation/devicetree/bindings/arm/arch_timer.txt
+++ b/Documentation/devicetree/bindings/arm/arch_timer.txt
@@ -22,6 +22,14 @@ to deliver its interrupts via SPIs.
 - always-on : a boolean property. If present, the timer is powered through an
  always-on power domain, therefore it never loses context.
+** Optional properties:
+- arm,cpu-registers-not-fw-configured : Firmware does not initialize
+  any of the generic timer CPU registers, which contain their
+  architecturally-defined reset values. Only supported for 32-bit
+  systems which follow the ARMv7 architected reset values.
 Example:
        timer {
diff --git a/Documentation/devicetree/bindings/bus/brcm,gisb-arb.txt b/Documentation/devicetree/bindings/bus/brcm,gisb-arb.txt
index e2d501d20c9a..1eceefb20f01 100644
--- a/Documentation/devicetree/bindings/bus/brcm,gisb-arb.txt
+++ b/Documentation/devicetree/bindings/bus/brcm,gisb-arb.txt
@@ -2,7 +2,11 @@ Broadcom GISB bus Arbiter controller
 Required properties:
- compatible: should be "brcm,gisb-arb"
+- compatible:
+    "brcm,gisb-arb" or "brcm,bcm7445-gisb-arb" for 28nm chips
+    "brcm,bcm7435-gisb-arb" for newer 40nm chips
+    "brcm,bcm7400-gisb-arb" for older 40nm chips and all 65nm chips
+    "brcm,bcm7038-gisb-arb" for 130nm chips
 - reg: specifies the base physical address and size of the registers
 - interrupt-parent: specifies the phandle to the parent interrupt controller
  this arbiter gets interrupt line from
diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt
new file mode 100644
index 000000000000..f3db93c85eea
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra-mc.txt
@@ -0,0 +1,36 @@
+NVIDIA Tegra Memory Controller device tree bindings
+===================================================
+Required properties:
+- compatible: Should be "nvidia,tegra<chip>-mc"
+- reg: Physical base address and length of the controller's registers.
+- clocks: Must contain an entry for each entry in clock-names.
+  See ../clocks/clock-bindings.txt for details.
+- clock-names: Must include the following entries:
+  - mc: the module's clock input
+- interrupts: The interrupt outputs from the controller.
+- #iommu-cells: Should be 1. The single cell of the IOMMU specifier defines
+  the SWGROUP of the master.
+This device implements an IOMMU that complies with the generic IOMMU binding.
+See ../iommu/iommu.txt for details.
+Example:
+--------
+        mc: memory-controller@0,70019000 {
+                compatible = "nvidia,tegra124-mc";
+                reg = <0x0 0x70019000 0x0 0x1000>;
+                clocks = <&tegra_car TEGRA124_CLK_MC>;
+                clock-names = "mc";
+                interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
+                #iommu-cells = <1>;
+        };
+        sdhci@0,700b0000 {
+                compatible = "nvidia,tegra124-sdhci";
+                ...
+                iommus = <&mc TEGRA_SWGROUP_SDMMC1A>;
+        };
diff --git a/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt b/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt
new file mode 100644
index 000000000000..54ae9f747e45
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt
@@ -0,0 +1,42 @@
+STMicroelectronics STi family Sysconfig Picophy SoftReset Controller
+=============================================================================
+This binding describes a reset controller device that is used to enable and
+disable on-chip PicoPHY USB2 phy(s) using "softreset" control bits found in
+the STi family SoC system configuration registers.
+The actual action taken when softreset is asserted is hardware dependent.
+However, when asserted it may not be possible to access the hardware's
+registers and after an assert/deassert sequence the hardware's previous state
+may no longer be valid.
+Please refer to Documentation/devicetree/bindings/reset/reset.txt
+for common reset controller binding usage.
+Required properties:
+- compatible: Should be "st,stih407-picophyreset"
+- #reset-cells: 1, see below
+Example:
+        picophyreset: picophyreset-controller {
+                compatible = "st,stih407-picophyreset";
+                #reset-cells = <1>;
+        };
+Specifying picophyreset control of devices
+=======================================
+Device nodes should specify the reset channel required in their "resets"
+property, containing a phandle to the picophyreset device node and an
+index specifying which channel to use, as described in
+Documentation/devicetree/bindings/reset/reset.txt.
+Example:
+        usb2_picophy0: usbpicophy@0 {
+                resets = <&picophyreset STIH407_PICOPHY0_RESET>;
+        };
+Macro definitions for the supported reset channels can be found in:
+include/dt-bindings/reset-controller/stih407-resets.h
diff --git a/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt b/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
new file mode 100644
index 000000000000..6ae79d1843f3
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
@@ -0,0 +1,23 @@
+Atmel AT91SAM9260 Real Time Timer
+Required properties:
+- compatible: should be: "atmel,at91sam9260-rtt"
+- reg: should encode the memory region of the RTT controller
+- interrupts: rtt alarm/event interrupt
+- clocks: should contain the 32 KHz slow clk that will drive the RTT block.
+- atmel,rtt-rtc-time-reg: should encode the GPBR register used to store
+        the time base when the RTT is used as an RTC.
+        The first cell should point to the GPBR node and the second one
+        encode the offset within the GPBR block (or in other words, the
+        GPBR register used to store the time base).
+Example:
+rtt@fffffd20 {
+        compatible = "atmel,at91sam9260-rtt";
+        reg = <0xfffffd20 0x10>;
+        interrupts = <1 4 7>;
+        clocks = <&clk32k>;
+        atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
+};
diff --git a/Documentation/devicetree/bindings/w1/omap-hdq.txt b/Documentation/devicetree/bindings/w1/omap-hdq.txt
new file mode 100644
index 000000000000..fef794741bd1
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/omap-hdq.txt
@@ -0,0 +1,17 @@
+* OMAP HDQ One wire bus master controller
+Required properties:
+- compatible : should be "ti,omap3-1w"
+- reg : Address and length of the register set for the device
+- interrupts : interrupt line.
+- ti,hwmods : "hdq1w"
+Example:
+- From omap3.dtsi
+  hdqw1w: 1w@480b2000 {
+        compatible = "ti,omap3-1w";
+        reg = <0x480b2000 0x1000>;
+        interrupts = <58>;
+        ti,hwmods = "hdq1w";
+  };
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8db9dc07f8ac..c8424a85bc04 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1246,9 +1246,6 @@ source "arch/arm/common/Kconfig"
 menu "Bus support"
-config ARM_AMBA
-        bool
 config ISA
        bool
        help
diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index 72041f002b7e..5662a872689b 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -245,6 +245,8 @@ struct edma {
        /* list of channels with no even trigger; terminated by "-1" */
        const s8        *noevent;
+        struct edma_soc_info *info;
        /* The edma_inuse bit for each PaRAM slot is clear unless the
         * channel is in use ... by ARM or DSP, for QDMA, or whatever.
         */
@@ -296,7 +298,7 @@ static void map_dmach_queue(unsigned ctlr, unsigned ch_no,
                        ~(0x7 << bit), queue_no << bit);
 }
-static void __init assign_priority_to_queue(unsigned ctlr, int queue_no,
+static void assign_priority_to_queue(unsigned ctlr, int queue_no,
                int priority)
 {
        int bit = queue_no * 4;
@@ -315,7 +317,7 @@ static void __init assign_priority_to_queue(unsigned ctlr, int queue_no,
 * included in that particular EDMA variant (Eg : dm646x)
 *
 */
-static void __init map_dmach_param(unsigned ctlr)
+static void map_dmach_param(unsigned ctlr)
 {
        int i;
        for (i = 0; i < EDMA_MAX_DMACH; i++)
@@ -1798,6 +1800,7 @@ static int edma_probe(struct platform_device *pdev)
                        edma_write_array2(j, EDMA_DRAE, i, 1, 0x0);
                        edma_write_array(j, EDMA_QRAE, i, 0x0);
                }
+                edma_cc[j]->info = info[j];
                arch_num_cc++;
                edma_dev_info.id = j;
@@ -1807,9 +1810,56 @@ static int edma_probe(struct platform_device *pdev)
        return 0;
 }
+#ifdef CONFIG_PM_SLEEP
+static int edma_pm_resume(struct device *dev)
+{
+        int i, j;
+        for (j = 0; j < arch_num_cc; j++) {
+                struct edma *cc = edma_cc[j];
+                s8 (*queue_priority_mapping)[2];
+                queue_priority_mapping = cc->info->queue_priority_mapping;
+                /* Event queue priority mapping */
+                for (i = 0; queue_priority_mapping[i][0] != -1; i++)
+                        assign_priority_to_queue(j,
+                                                 queue_priority_mapping[i][0],
+                                                 queue_priority_mapping[i][1]);
+                /*
+                 * Map the channel to param entry if channel mapping logic
+                 * exist
+                 */
+                if (edma_read(j, EDMA_CCCFG) & CHMAP_EXIST)
+                        map_dmach_param(j);
+                for (i = 0; i < cc->num_channels; i++) {
+                        if (test_bit(i, cc->edma_inuse)) {
+                                /* ensure access through shadow region 0 */
+                                edma_or_array2(j, EDMA_DRAE, 0, i >> 5,
+                                               BIT(i & 0x1f));
+                                setup_dma_interrupt(i,
+                                                    cc->intr_data[i].callback,
+                                                    cc->intr_data[i].data);
+                        }
+                }
+        }
+        return 0;
+}
+#endif
+static const struct dev_pm_ops edma_pm_ops = {
+        SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, edma_pm_resume)
+};
 static struct platform_driver edma_driver = {
        .driver = {
                .name   = "edma",
+                .pm     = &edma_pm_ops,
                .of_match_table = edma_of_ids,
        },
        .probe = edma_probe,
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 92793ba69c40..d4ebf5679f1f 100644
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -78,6 +78,15 @@ static inline u32 arch_timer_get_cntfrq(void)
        return val;
 }
+static inline u64 arch_counter_get_cntpct(void)
+{
+        u64 cval;
+        isb();
+        asm volatile("mrrc p15, 0, %Q0, %R0, c14" : "=r" (cval));
+        return cval;
+}
 static inline u64 arch_counter_get_cntvct(void)
 {
        u64 cval;
diff --git a/arch/arm/include/asm/perf_event.h b/arch/arm/include/asm/perf_event.h
index c3a83691af8e..d9cf138fd7d4 100644
--- a/arch/arm/include/asm/perf_event.h
+++ b/arch/arm/include/asm/perf_event.h
@@ -12,7 +12,7 @@
 #ifndef __ARM_PERF_EVENT_H__
 #define __ARM_PERF_EVENT_H__
-#ifdef CONFIG_HW_PERF_EVENTS
+#ifdef CONFIG_PERF_EVENTS
 struct pt_regs;
 extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
 extern unsigned long perf_misc_flags(struct pt_regs *regs);
diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h
index 0b648c541293..b1596bd59129 100644
--- a/arch/arm/include/asm/pmu.h
+++ b/arch/arm/include/asm/pmu.h
@@ -15,6 +15,8 @@
 #include <linux/interrupt.h>
 #include <linux/perf_event.h>
+#include <asm/cputype.h>
 /*
 * struct arm_pmu_platdata - ARM PMU platform data
 *
@@ -66,19 +68,25 @@ struct pmu_hw_events {
        /*
         * The events that are active on the PMU for the given index.
         */
-        struct perf_event       **events;
+        struct perf_event       *events[ARMPMU_MAX_HWEVENTS];
        /*
         * A 1 bit for an index indicates that the counter is being used for
         * an event. A 0 means that the counter can be used.
         */
-        unsigned long           *used_mask;
+        DECLARE_BITMAP(used_mask, ARMPMU_MAX_HWEVENTS);
        /*
         * Hardware lock to serialize accesses to PMU registers. Needed for the
         * read/modify/write sequences.
         */
        raw_spinlock_t          pmu_lock;
+        /*
+         * When using percpu IRQs, we need a percpu dev_id. Place it here as we
+         * already have to allocate this struct per cpu.
+         */
+        struct arm_pmu          *percpu_pmu;
 };
 struct arm_pmu {
@@ -107,7 +115,8 @@ struct arm_pmu {
        struct mutex    reserve_mutex;
        u64             max_period;
        struct platform_device  *plat_device;
-        struct pmu_hw_events    *(*get_hw_events)(void);
+        struct pmu_hw_events    __percpu *hw_events;
+        struct notifier_block   hotplug_nb;
 };
 #define to_arm_pmu(p) (container_of(p, struct arm_pmu, pmu))
@@ -127,6 +136,27 @@ int armpmu_map_event(struct perf_event *event,
                                                [PERF_COUNT_HW_CACHE_RESULT_MAX],
                     u32 raw_event_mask);
+struct pmu_probe_info {
+        unsigned int cpuid;
+        unsigned int mask;
+        int (*init)(struct arm_pmu *);
+};
+#define PMU_PROBE(_cpuid, _mask, _fn)   \
+{                                       \
+        .cpuid = (_cpuid),              \
+        .mask = (_mask),                \
+        .init = (_fn),                  \
+}
+#define ARM_PMU_PROBE(_cpuid, _fn) \
+        PMU_PROBE(_cpuid, ARM_CPU_PART_MASK, _fn)
+#define ARM_PMU_XSCALE_MASK     ((0xff << 24) | ARM_CPU_XSCALE_ARCH_MASK)
+#define XSCALE_PMU_PROBE(_version, _fn) \
+        PMU_PROBE(ARM_CPU_IMP_INTEL << 24 | _version, ARM_PMU_XSCALE_MASK, _fn)
 #endif /* CONFIG_HW_PERF_EVENTS */
 #endif /* __ARM_PMU_H__ */
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 38ddd9f83d0e..8dcbed5016ac 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -82,7 +82,7 @@ obj-$(CONFIG_CPU_MOHAWK)	+= xscale-cp0.o
 obj-$(CONFIG_CPU_PJ4)           += pj4-cp0.o
 obj-$(CONFIG_CPU_PJ4B)          += pj4-cp0.o
 obj-$(CONFIG_IWMMXT)            += iwmmxt.o
-obj-$(CONFIG_PERF_EVENTS)       += perf_regs.o
+obj-$(CONFIG_PERF_EVENTS)       += perf_regs.o perf_callchain.o
 obj-$(CONFIG_HW_PERF_EVENTS)    += perf_event.o perf_event_cpu.o
 AFLAGS_iwmmxt.o                 := -Wa,-mcpu=iwmmxt
 obj-$(CONFIG_ARM_CPU_TOPOLOGY)  += topology.o
diff --git a/arch/arm/kernel/perf_callchain.c b/arch/arm/kernel/perf_callchain.c
new file mode 100644
index 000000000000..4e02ae5950ff
--- /dev/null
+++ b/arch/arm/kernel/perf_callchain.c
@@ -0,0 +1,136 @@
+/*
+ * ARM callchain support
+ *
+ * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
+ * Copyright (C) 2010 ARM Ltd., Will Deacon <will.deacon@arm.com>
+ *
+ * This code is based on the ARM OProfile backtrace code.
+ */
+#include <linux/perf_event.h>
+#include <linux/uaccess.h>
+#include <asm/stacktrace.h>
+/*
+ * The registers we're interested in are at the end of the variable
+ * length saved register structure. The fp points at the end of this
+ * structure so the address of this struct is:
+ * (struct frame_tail *)(xxx->fp)-1
+ *
+ * This code has been adapted from the ARM OProfile support.
+ */
+struct frame_tail {
+        struct frame_tail __user *fp;
+        unsigned long sp;
+        unsigned long lr;
+} __attribute__((packed));
+/*
+ * Get the return address for a single stackframe and return a pointer to the
+ * next frame tail.
+ */
+static struct frame_tail __user *
+user_backtrace(struct frame_tail __user *tail,
+               struct perf_callchain_entry *entry)
+{
+        struct frame_tail buftail;
+        unsigned long err;
+        if (!access_ok(VERIFY_READ, tail, sizeof(buftail)))
+                return NULL;
+        pagefault_disable();
+        err = __copy_from_user_inatomic(&buftail, tail, sizeof(buftail));
+        pagefault_enable();
+        if (err)
+                return NULL;
+        perf_callchain_store(entry, buftail.lr);
+        /*
+         * Frame pointers should strictly progress back up the stack
+         * (towards higher addresses).
+         */
+        if (tail + 1 >= buftail.fp)
+                return NULL;
+        return buftail.fp - 1;
+}
+void
+perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
+{
+        struct frame_tail __user *tail;
+        if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
+                /* We don't support guest os callchain now */
+                return;
+        }
+        perf_callchain_store(entry, regs->ARM_pc);
+        if (!current->mm)
+                return;
+        tail = (struct frame_tail __user *)regs->ARM_fp - 1;
+        while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
+               tail && !((unsigned long)tail & 0x3))
+                tail = user_backtrace(tail, entry);
+}
+/*
+ * Gets called by walk_stackframe() for every stackframe. This will be called
+ * whist unwinding the stackframe and is like a subroutine return so we use
+ * the PC.
+ */
+static int
+callchain_trace(struct stackframe *fr,
+                void *data)
+{
+        struct perf_callchain_entry *entry = data;
+        perf_callchain_store(entry, fr->pc);
+        return 0;
+}
+void
+perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
+{
+        struct stackframe fr;
+        if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
+                /* We don't support guest os callchain now */
+                return;
+        }
+        arm_get_current_stackframe(regs, &fr);
+        walk_stackframe(&fr, callchain_trace, entry);
+}
+unsigned long perf_instruction_pointer(struct pt_regs *regs)
+{
+        if (perf_guest_cbs && perf_guest_cbs->is_in_guest())
+                return perf_guest_cbs->get_guest_ip();
+        return instruction_pointer(regs);
+}
+unsigned long perf_misc_flags(struct pt_regs *regs)
+{
+        int misc = 0;
+        if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
+                if (perf_guest_cbs->is_user_mode())
+                        misc |= PERF_RECORD_MISC_GUEST_USER;
+                else
+                        misc |= PERF_RECORD_MISC_GUEST_KERNEL;
+        } else {
+                if (user_mode(regs))
+                        misc |= PERF_RECORD_MISC_USER;
+                else
+                        misc |= PERF_RECORD_MISC_KERNEL;
+        }
+        return misc;
+}
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 266cba46db3e..e34934f63a49 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -7,21 +7,18 @@
 * Copyright (C) 2010 ARM Ltd., Will Deacon <will.deacon@arm.com>
 *
 * This code is based on the sparc64 perf event code, which is in turn based
- * on the x86 code. Callchain code is based on the ARM OProfile backtrace
+ * on the x86 code.
- * code.
 */
 #define pr_fmt(fmt) "hw perfevents: " fmt
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
-#include <linux/uaccess.h>
 #include <linux/irq.h>
 #include <linux/irqdesc.h>
 #include <asm/irq_regs.h>
 #include <asm/pmu.h>
-#include <asm/stacktrace.h>
 static int
 armpmu_map_cache_event(const unsigned (*cache_map)
@@ -80,8 +77,12 @@ armpmu_map_event(struct perf_event *event,
                 u32 raw_event_mask)
 {
        u64 config = event->attr.config;
+        int type = event->attr.type;
-        switch (event->attr.type) {
+        if (type == event->pmu->type)
+                return armpmu_map_raw_event(raw_event_mask, config);
+        switch (type) {
        case PERF_TYPE_HARDWARE:
                return armpmu_map_hw_event(event_map, config);
        case PERF_TYPE_HW_CACHE:
@@ -200,7 +201,7 @@ static void
 armpmu_del(struct perf_event *event, int flags)
 {
        struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
-        struct pmu_hw_events *hw_events = armpmu->get_hw_events();
+        struct pmu_hw_events *hw_events = this_cpu_ptr(armpmu->hw_events);
        struct hw_perf_event *hwc = &event->hw;
        int idx = hwc->idx;
@@ -217,7 +218,7 @@ static int
 armpmu_add(struct perf_event *event, int flags)
 {
        struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
-        struct pmu_hw_events *hw_events = armpmu->get_hw_events();
+        struct pmu_hw_events *hw_events = this_cpu_ptr(armpmu->hw_events);
        struct hw_perf_event *hwc = &event->hw;
        int idx;
        int err = 0;
@@ -274,14 +275,12 @@ validate_group(struct perf_event *event)
 {
        struct perf_event *sibling, *leader = event->group_leader;
        struct pmu_hw_events fake_pmu;
-        DECLARE_BITMAP(fake_used_mask, ARMPMU_MAX_HWEVENTS);
        /*
         * Initialise the fake PMU. We only need to populate the
         * used_mask for the purposes of validation.
         */
-        memset(fake_used_mask, 0, sizeof(fake_used_mask));
+        memset(&fake_pmu.used_mask, 0, sizeof(fake_pmu.used_mask));
-        fake_pmu.used_mask = fake_used_mask;
        if (!validate_event(&fake_pmu, leader))
                return -EINVAL;
@@ -305,17 +304,21 @@ static irqreturn_t armpmu_dispatch_irq(int irq, void *dev)
        int ret;
        u64 start_clock, finish_clock;
-        if (irq_is_percpu(irq))
+        /*
-                dev = *(void **)dev;
+         * we request the IRQ with a (possibly percpu) struct arm_pmu**, but
-        armpmu = dev;
+         * the handlers expect a struct arm_pmu*. The percpu_irq framework will
+         * do any necessary shifting, we just need to perform the first
+         * dereference.
+         */
+        armpmu = *(void **)dev;
        plat_device = armpmu->plat_device;
        plat = dev_get_platdata(&plat_device->dev);
        start_clock = sched_clock();
        if (plat && plat->handle_irq)
-                ret = plat->handle_irq(irq, dev, armpmu->handle_irq);
+                ret = plat->handle_irq(irq, armpmu, armpmu->handle_irq);
        else
-                ret = armpmu->handle_irq(irq, dev);
+                ret = armpmu->handle_irq(irq, armpmu);
        finish_clock = sched_clock();
        perf_sample_event_took(finish_clock - start_clock);
@@ -468,7 +471,7 @@ static int armpmu_event_init(struct perf_event *event)
 static void armpmu_enable(struct pmu *pmu)
 {
        struct arm_pmu *armpmu = to_arm_pmu(pmu);
-        struct pmu_hw_events *hw_events = armpmu->get_hw_events();
+        struct pmu_hw_events *hw_events = this_cpu_ptr(armpmu->hw_events);
        int enabled = bitmap_weight(hw_events->used_mask, armpmu->num_events);
        if (enabled)
@@ -533,130 +536,3 @@ int armpmu_register(struct arm_pmu *armpmu, int type)
        return perf_pmu_register(&armpmu->pmu, armpmu->name, type);
 }
-/*
- * Callchain handling code.
- */
-/*
- * The registers we're interested in are at the end of the variable
- * length saved register structure. The fp points at the end of this
- * structure so the address of this struct is:
- * (struct frame_tail *)(xxx->fp)-1
- *
- * This code has been adapted from the ARM OProfile support.
- */
-struct frame_tail {
-        struct frame_tail __user *fp;
-        unsigned long sp;
-        unsigned long lr;
-} __attribute__((packed));
-/*
- * Get the return address for a single stackframe and return a pointer to the
- * next frame tail.
- */
-static struct frame_tail __user *
-user_backtrace(struct frame_tail __user *tail,
-               struct perf_callchain_entry *entry)
-{
-        struct frame_tail buftail;
-        unsigned long err;
-        if (!access_ok(VERIFY_READ, tail, sizeof(buftail)))
-                return NULL;
-        pagefault_disable();
-        err = __copy_from_user_inatomic(&buftail, tail, sizeof(buftail));
-        pagefault_enable();
-        if (err)
-                return NULL;
-        perf_callchain_store(entry, buftail.lr);
-        /*
-         * Frame pointers should strictly progress back up the stack
-         * (towards higher addresses).
-         */
-        if (tail + 1 >= buftail.fp)
-                return NULL;
-        return buftail.fp - 1;
-}
-void
-perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
-{
-        struct frame_tail __user *tail;
-        if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
-                /* We don't support guest os callchain now */
-                return;
-        }
-        perf_callchain_store(entry, regs->ARM_pc);
-        if (!current->mm)
-                return;
-        tail = (struct frame_tail __user *)regs->ARM_fp - 1;
-        while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
-               tail && !((unsigned long)tail & 0x3))
-                tail = user_backtrace(tail, entry);
-}
-/*
- * Gets called by walk_stackframe() for every stackframe. This will be called
- * whist unwinding the stackframe and is like a subroutine return so we use
- * the PC.
- */
-static int
-callchain_trace(struct stackframe *fr,
-                void *data)
-{
-        struct perf_callchain_entry *entry = data;
-        perf_callchain_store(entry, fr->pc);
-        return 0;
-}
-void
-perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
-{
-        struct stackframe fr;
-        if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
-                /* We don't support guest os callchain now */
-                return;
-        }
-        arm_get_current_stackframe(regs, &fr);
-        walk_stackframe(&fr, callchain_trace, entry);
-}
-unsigned long perf_instruction_pointer(struct pt_regs *regs)
-{
-        if (perf_guest_cbs && perf_guest_cbs->is_in_guest())
-                return perf_guest_cbs->get_guest_ip();
-        return instruction_pointer(regs);
-}
-unsigned long perf_misc_flags(struct pt_regs *regs)
-{
-        int misc = 0;
-        if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
-                if (perf_guest_cbs->is_user_mode())
-                        misc |= PERF_RECORD_MISC_GUEST_USER;
-                else
-                        misc |= PERF_RECORD_MISC_GUEST_KERNEL;
-        } else {
-                if (user_mode(regs))
-                        misc |= PERF_RECORD_MISC_USER;
-                else
-                        misc |= PERF_RECORD_MISC_KERNEL;
-        }
-        return misc;
-}
diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c
index eb2c4d55666b..dd9acc95ebc0 100644
--- a/arch/arm/kernel/perf_event_cpu.c
+++ b/arch/arm/kernel/perf_event_cpu.c
@@ -35,11 +35,6 @@
 /* Set at runtime when we know what CPU type we are. */
 static struct arm_pmu *cpu_pmu;
-static DEFINE_PER_CPU(struct arm_pmu *, percpu_pmu);
-static DEFINE_PER_CPU(struct perf_event * [ARMPMU_MAX_HWEVENTS], hw_events);
-static DEFINE_PER_CPU(unsigned long [BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)], used_mask);
-static DEFINE_PER_CPU(struct pmu_hw_events, cpu_hw_events);
 /*
 * Despite the names, these two functions are CPU-specific and are used
 * by the OProfile/perf code.
@@ -69,11 +64,6 @@ EXPORT_SYMBOL_GPL(perf_num_counters);
 #include "perf_event_v6.c"
 #include "perf_event_v7.c"
-static struct pmu_hw_events *cpu_pmu_get_cpu_events(void)
-{
-        return this_cpu_ptr(&cpu_hw_events);
-}
 static void cpu_pmu_enable_percpu_irq(void *data)
 {
        int irq = *(int *)data;
@@ -92,20 +82,21 @@ static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu)
 {
        int i, irq, irqs;
        struct platform_device *pmu_device = cpu_pmu->plat_device;
+        struct pmu_hw_events __percpu *hw_events = cpu_pmu->hw_events;
        irqs = min(pmu_device->num_resources, num_possible_cpus());
        irq = platform_get_irq(pmu_device, 0);
        if (irq >= 0 && irq_is_percpu(irq)) {
                on_each_cpu(cpu_pmu_disable_percpu_irq, &irq, 1);
-                free_percpu_irq(irq, &percpu_pmu);
+                free_percpu_irq(irq, &hw_events->percpu_pmu);
        } else {
                for (i = 0; i < irqs; ++i) {
                        if (!cpumask_test_and_clear_cpu(i, &cpu_pmu->active_irqs))
                                continue;
                        irq = platform_get_irq(pmu_device, i);
                        if (irq >= 0)
-                                free_irq(irq, cpu_pmu);
+                                free_irq(irq, per_cpu_ptr(&hw_events->percpu_pmu, i));
                }
        }
 }
@@ -114,19 +105,21 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
 {
        int i, err, irq, irqs;
        struct platform_device *pmu_device = cpu_pmu->plat_device;
+        struct pmu_hw_events __percpu *hw_events = cpu_pmu->hw_events;
        if (!pmu_device)
                return -ENODEV;
        irqs = min(pmu_device->num_resources, num_possible_cpus());
        if (irqs < 1) {
-                printk_once("perf/ARM: No irqs for PMU defined, sampling events not supported\n");
+                pr_warn_once("perf/ARM: No irqs for PMU defined, sampling events not supported\n");
                return 0;
        }
        irq = platform_get_irq(pmu_device, 0);
        if (irq >= 0 && irq_is_percpu(irq)) {
-                err = request_percpu_irq(irq, handler, "arm-pmu", &percpu_pmu);
+                err = request_percpu_irq(irq, handler, "arm-pmu",
+                                         &hw_events->percpu_pmu);
                if (err) {
                        pr_err("unable to request IRQ%d for ARM PMU counters\n",
                                irq);
@@ -153,7 +146,7 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
                        err = request_irq(irq, handler,
                                          IRQF_NOBALANCING | IRQF_NO_THREAD, "arm-pmu",
-                                          cpu_pmu);
+                                          per_cpu_ptr(&hw_events->percpu_pmu, i));
                        if (err) {
                                pr_err("unable to request IRQ%d for ARM PMU counters\n",
                                        irq);
@@ -167,18 +160,50 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
        return 0;
 }
-static void cpu_pmu_init(struct arm_pmu *cpu_pmu)
+/*
+ * PMU hardware loses all context when a CPU goes offline.
+ * When a CPU is hotplugged back in, since some hardware registers are
+ * UNKNOWN at reset, the PMU must be explicitly reset to avoid reading
+ * junk values out of them.
+ */
+static int cpu_pmu_notify(struct notifier_block *b, unsigned long action,
+                          void *hcpu)
+{
+        struct arm_pmu *pmu = container_of(b, struct arm_pmu, hotplug_nb);
+        if ((action & ~CPU_TASKS_FROZEN) != CPU_STARTING)
+                return NOTIFY_DONE;
+        if (pmu->reset)
+                pmu->reset(pmu);
+        else
+                return NOTIFY_DONE;
+        return NOTIFY_OK;
+}
+static int cpu_pmu_init(struct arm_pmu *cpu_pmu)
 {
+        int err;
        int cpu;
+        struct pmu_hw_events __percpu *cpu_hw_events;
+        cpu_hw_events = alloc_percpu(struct pmu_hw_events);
+        if (!cpu_hw_events)
+                return -ENOMEM;
+        cpu_pmu->hotplug_nb.notifier_call = cpu_pmu_notify;
+        err = register_cpu_notifier(&cpu_pmu->hotplug_nb);
+        if (err)
+                goto out_hw_events;
        for_each_possible_cpu(cpu) {
-                struct pmu_hw_events *events = &per_cpu(cpu_hw_events, cpu);
+                struct pmu_hw_events *events = per_cpu_ptr(cpu_hw_events, cpu);
-                events->events = per_cpu(hw_events, cpu);
-                events->used_mask = per_cpu(used_mask, cpu);
                raw_spin_lock_init(&events->pmu_lock);
-                per_cpu(percpu_pmu, cpu) = cpu_pmu;
+                events->percpu_pmu = cpu_pmu;
        }
-        cpu_pmu->get_hw_events  = cpu_pmu_get_cpu_events;
+        cpu_pmu->hw_events      = cpu_hw_events;
        cpu_pmu->request_irq    = cpu_pmu_request_irq;
        cpu_pmu->free_irq       = cpu_pmu_free_irq;
@@ -189,31 +214,19 @@ static void cpu_pmu_init(struct arm_pmu *cpu_pmu)
        /* If no interrupts available, set the corresponding capability flag */
        if (!platform_get_irq(cpu_pmu->plat_device, 0))
                cpu_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
-}
-/*
- * PMU hardware loses all context when a CPU goes offline.
- * When a CPU is hotplugged back in, since some hardware registers are
- * UNKNOWN at reset, the PMU must be explicitly reset to avoid reading
- * junk values out of them.
- */
-static int cpu_pmu_notify(struct notifier_block *b, unsigned long action,
-                          void *hcpu)
-{
-        if ((action & ~CPU_TASKS_FROZEN) != CPU_STARTING)
-                return NOTIFY_DONE;
-        if (cpu_pmu && cpu_pmu->reset)
+        return 0;
-                cpu_pmu->reset(cpu_pmu);
-        else
-                return NOTIFY_DONE;
-        return NOTIFY_OK;
+out_hw_events:
+        free_percpu(cpu_hw_events);
+        return err;
 }
-static struct notifier_block cpu_pmu_hotplug_notifier = {
+static void cpu_pmu_destroy(struct arm_pmu *cpu_pmu)
-        .notifier_call = cpu_pmu_notify,
+{
-};
+        unregister_cpu_notifier(&cpu_pmu->hotplug_nb);
+        free_percpu(cpu_pmu->hw_events);
+}
 /*
 * PMU platform driver and devicetree bindings.
@@ -241,48 +254,34 @@ static struct platform_device_id cpu_pmu_plat_device_ids[] = {
        {},
 };
+static const struct pmu_probe_info pmu_probe_table[] = {
+        ARM_PMU_PROBE(ARM_CPU_PART_ARM1136, armv6_1136_pmu_init),
+        ARM_PMU_PROBE(ARM_CPU_PART_ARM1156, armv6_1156_pmu_init),
+        ARM_PMU_PROBE(ARM_CPU_PART_ARM1176, armv6_1176_pmu_init),
+        ARM_PMU_PROBE(ARM_CPU_PART_ARM11MPCORE, armv6mpcore_pmu_init),
+        ARM_PMU_PROBE(ARM_CPU_PART_CORTEX_A8, armv7_a8_pmu_init),
+        ARM_PMU_PROBE(ARM_CPU_PART_CORTEX_A9, armv7_a9_pmu_init),
+        XSCALE_PMU_PROBE(ARM_CPU_XSCALE_ARCH_V1, xscale1pmu_init),
+        XSCALE_PMU_PROBE(ARM_CPU_XSCALE_ARCH_V2, xscale2pmu_init),
+        { /* sentinel value */ }
+};
 /*
 * CPU PMU identification and probing.
 */
 static int probe_current_pmu(struct arm_pmu *pmu)
 {
        int cpu = get_cpu();
+        unsigned int cpuid = read_cpuid_id();
        int ret = -ENODEV;
+        const struct pmu_probe_info *info;
        pr_info("probing PMU on CPU %d\n", cpu);
-        switch (read_cpuid_part()) {
+        for (info = pmu_probe_table; info->init != NULL; info++) {
-        /* ARM Ltd CPUs. */
+                if ((cpuid & info->mask) != info->cpuid)
-        case ARM_CPU_PART_ARM1136:
+                        continue;
-                ret = armv6_1136_pmu_init(pmu);
+                ret = info->init(pmu);
-                break;
-        case ARM_CPU_PART_ARM1156:
-                ret = armv6_1156_pmu_init(pmu);
-                break;
-        case ARM_CPU_PART_ARM1176:
-                ret = armv6_1176_pmu_init(pmu);
-                break;
-        case ARM_CPU_PART_ARM11MPCORE:
-                ret = armv6mpcore_pmu_init(pmu);
-                break;
-        case ARM_CPU_PART_CORTEX_A8:
-                ret = armv7_a8_pmu_init(pmu);
-                break;
-        case ARM_CPU_PART_CORTEX_A9:
-                ret = armv7_a9_pmu_init(pmu);
-                break;
-        default:
-                if (read_cpuid_implementor() == ARM_CPU_IMP_INTEL) {
-                        switch (xscale_cpu_arch_version()) {
-                        case ARM_CPU_XSCALE_ARCH_V1:
-                                ret = xscale1pmu_init(pmu);
-                                break;
-                        case ARM_CPU_XSCALE_ARCH_V2:
-                                ret = xscale2pmu_init(pmu);
-                                break;
-                        }
-                }
                break;
        }
@@ -299,13 +298,13 @@ static int cpu_pmu_device_probe(struct platform_device *pdev)
        int ret = -ENODEV;
        if (cpu_pmu) {
-                pr_info("attempt to register multiple PMU devices!");
+                pr_info("attempt to register multiple PMU devices!\n");
                return -ENOSPC;
        }
        pmu = kzalloc(sizeof(struct arm_pmu), GFP_KERNEL);
        if (!pmu) {
-                pr_info("failed to allocate PMU device!");
+                pr_info("failed to allocate PMU device!\n");
                return -ENOMEM;
        }
@@ -320,18 +319,24 @@ static int cpu_pmu_device_probe(struct platform_device *pdev)
        }
        if (ret) {
-                pr_info("failed to probe PMU!");
+                pr_info("failed to probe PMU!\n");
                goto out_free;
        }
-        cpu_pmu_init(cpu_pmu);
+        ret = cpu_pmu_init(cpu_pmu);
-        ret = armpmu_register(cpu_pmu, PERF_TYPE_RAW);
+        if (ret)
+                goto out_free;
-        if (!ret)
+        ret = armpmu_register(cpu_pmu, -1);
-                return 0;
+        if (ret)
+                goto out_destroy;
+        return 0;
+out_destroy:
+        cpu_pmu_destroy(cpu_pmu);
 out_free:
-        pr_info("failed to register PMU devices!");
+        pr_info("failed to register PMU devices!\n");
        kfree(pmu);
        return ret;
 }
@@ -348,16 +353,6 @@ static struct platform_driver cpu_pmu_driver = {
 static int __init register_pmu_driver(void)
 {
-        int err;
+        return platform_driver_register(&cpu_pmu_driver);
-        err = register_cpu_notifier(&cpu_pmu_hotplug_notifier);
-        if (err)
-                return err;
-        err = platform_driver_register(&cpu_pmu_driver);
-        if (err)
-                unregister_cpu_notifier(&cpu_pmu_hotplug_notifier);
-        return err;
 }
 device_initcall(register_pmu_driver);
diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index abfeb04f3213..f2ffd5c542ed 100644
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -262,7 +262,7 @@ static void armv6pmu_enable_event(struct perf_event *event)
        unsigned long val, mask, evt, flags;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        if (ARMV6_CYCLE_COUNTER == idx) {
@@ -300,7 +300,7 @@ armv6pmu_handle_irq(int irq_num,
        unsigned long pmcr = armv6_pmcr_read();
        struct perf_sample_data data;
        struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
-        struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
        struct pt_regs *regs;
        int idx;
@@ -356,7 +356,7 @@ armv6pmu_handle_irq(int irq_num,
 static void armv6pmu_start(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags, val;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        val = armv6_pmcr_read();
@@ -368,7 +368,7 @@ static void armv6pmu_start(struct arm_pmu *cpu_pmu)
 static void armv6pmu_stop(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags, val;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        val = armv6_pmcr_read();
@@ -409,7 +409,7 @@ static void armv6pmu_disable_event(struct perf_event *event)
        unsigned long val, mask, evt, flags;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        if (ARMV6_CYCLE_COUNTER == idx) {
@@ -444,7 +444,7 @@ static void armv6mpcore_pmu_disable_event(struct perf_event *event)
        unsigned long val, mask, flags, evt = 0;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        if (ARMV6_CYCLE_COUNTER == idx) {
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
index 116758b77f93..8993770c47de 100644
--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -564,13 +564,11 @@ static inline int armv7_pmnc_counter_has_overflowed(u32 pmnc, int idx)
        return pmnc & BIT(ARMV7_IDX_TO_COUNTER(idx));
 }
-static inline int armv7_pmnc_select_counter(int idx)
+static inline void armv7_pmnc_select_counter(int idx)
 {
        u32 counter = ARMV7_IDX_TO_COUNTER(idx);
        asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (counter));
        isb();
-        return idx;
 }
 static inline u32 armv7pmu_read_counter(struct perf_event *event)
@@ -580,13 +578,15 @@ static inline u32 armv7pmu_read_counter(struct perf_event *event)
        int idx = hwc->idx;
        u32 value = 0;
-        if (!armv7_pmnc_counter_valid(cpu_pmu, idx))
+        if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
                pr_err("CPU%u reading wrong counter %d\n",
                        smp_processor_id(), idx);
-        else if (idx == ARMV7_IDX_CYCLE_COUNTER)
+        } else if (idx == ARMV7_IDX_CYCLE_COUNTER) {
                asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
-        else if (armv7_pmnc_select_counter(idx) == idx)
+        } else {
+                armv7_pmnc_select_counter(idx);
                asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (value));
+        }
        return value;
 }
@@ -597,45 +597,43 @@ static inline void armv7pmu_write_counter(struct perf_event *event, u32 value)
        struct hw_perf_event *hwc = &event->hw;
        int idx = hwc->idx;
-        if (!armv7_pmnc_counter_valid(cpu_pmu, idx))
+        if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
                pr_err("CPU%u writing wrong counter %d\n",
                        smp_processor_id(), idx);
-        else if (idx == ARMV7_IDX_CYCLE_COUNTER)
+        } else if (idx == ARMV7_IDX_CYCLE_COUNTER) {
                asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
-        else if (armv7_pmnc_select_counter(idx) == idx)
+        } else {
+                armv7_pmnc_select_counter(idx);
                asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (value));
+        }
 }
 static inline void armv7_pmnc_write_evtsel(int idx, u32 val)
 {
-        if (armv7_pmnc_select_counter(idx) == idx) {
+        armv7_pmnc_select_counter(idx);
-                val &= ARMV7_EVTYPE_MASK;
+        val &= ARMV7_EVTYPE_MASK;
-                asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
+        asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
-        }
 }
-static inline int armv7_pmnc_enable_counter(int idx)
+static inline void armv7_pmnc_enable_counter(int idx)
 {
        u32 counter = ARMV7_IDX_TO_COUNTER(idx);
        asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (BIT(counter)));
-        return idx;
 }
-static inline int armv7_pmnc_disable_counter(int idx)
+static inline void armv7_pmnc_disable_counter(int idx)
 {
        u32 counter = ARMV7_IDX_TO_COUNTER(idx);
        asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (BIT(counter)));
-        return idx;
 }
-static inline int armv7_pmnc_enable_intens(int idx)
+static inline void armv7_pmnc_enable_intens(int idx)
 {
        u32 counter = ARMV7_IDX_TO_COUNTER(idx);
        asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (BIT(counter)));
-        return idx;
 }
-static inline int armv7_pmnc_disable_intens(int idx)
+static inline void armv7_pmnc_disable_intens(int idx)
 {
        u32 counter = ARMV7_IDX_TO_COUNTER(idx);
        asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (BIT(counter)));
@@ -643,8 +641,6 @@ static inline int armv7_pmnc_disable_intens(int idx)
        /* Clear the overflow flag in case an interrupt is pending. */
        asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (BIT(counter)));
        isb();
-        return idx;
 }
 static inline u32 armv7_pmnc_getreset_flags(void)
@@ -667,34 +663,34 @@ static void armv7_pmnc_dump_regs(struct arm_pmu *cpu_pmu)
        u32 val;
        unsigned int cnt;
-        printk(KERN_INFO "PMNC registers dump:\n");
+        pr_info("PMNC registers dump:\n");
        asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
-        printk(KERN_INFO "PMNC  =0x%08x\n", val);
+        pr_info("PMNC  =0x%08x\n", val);
        asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
-        printk(KERN_INFO "CNTENS=0x%08x\n", val);
+        pr_info("CNTENS=0x%08x\n", val);
        asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
-        printk(KERN_INFO "INTENS=0x%08x\n", val);
+        pr_info("INTENS=0x%08x\n", val);
        asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
-        printk(KERN_INFO "FLAGS =0x%08x\n", val);
+        pr_info("FLAGS =0x%08x\n", val);
        asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
-        printk(KERN_INFO "SELECT=0x%08x\n", val);
+        pr_info("SELECT=0x%08x\n", val);
        asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
-        printk(KERN_INFO "CCNT  =0x%08x\n", val);
+        pr_info("CCNT  =0x%08x\n", val);
        for (cnt = ARMV7_IDX_COUNTER0;
                        cnt <= ARMV7_IDX_COUNTER_LAST(cpu_pmu); cnt++) {
                armv7_pmnc_select_counter(cnt);
                asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
-                printk(KERN_INFO "CNT[%d] count =0x%08x\n",
+                pr_info("CNT[%d] count =0x%08x\n",
                        ARMV7_IDX_TO_COUNTER(cnt), val);
                asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
-                printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n",
+                pr_info("CNT[%d] evtsel=0x%08x\n",
                        ARMV7_IDX_TO_COUNTER(cnt), val);
        }
 }
@@ -705,7 +701,7 @@ static void armv7pmu_enable_event(struct perf_event *event)
        unsigned long flags;
        struct hw_perf_event *hwc = &event->hw;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
@@ -751,7 +747,7 @@ static void armv7pmu_disable_event(struct perf_event *event)
        unsigned long flags;
        struct hw_perf_event *hwc = &event->hw;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
@@ -783,7 +779,7 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
        u32 pmnc;
        struct perf_sample_data data;
        struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
-        struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
        struct pt_regs *regs;
        int idx;
@@ -843,7 +839,7 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
 static void armv7pmu_start(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        /* Enable all counters */
@@ -854,7 +850,7 @@ static void armv7pmu_start(struct arm_pmu *cpu_pmu)
 static void armv7pmu_stop(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        /* Disable all counters */
@@ -1287,7 +1283,7 @@ static void krait_pmu_disable_event(struct perf_event *event)
        struct hw_perf_event *hwc = &event->hw;
        int idx = hwc->idx;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        /* Disable counter and interrupt */
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
@@ -1313,7 +1309,7 @@ static void krait_pmu_enable_event(struct perf_event *event)
        struct hw_perf_event *hwc = &event->hw;
        int idx = hwc->idx;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        /*
         * Enable counter and interrupt, and set the counter to count
diff --git a/arch/arm/kernel/perf_event_xscale.c b/arch/arm/kernel/perf_event_xscale.c
index 08da0af550b7..8af9f1f82c68 100644
--- a/arch/arm/kernel/perf_event_xscale.c
+++ b/arch/arm/kernel/perf_event_xscale.c
@@ -138,7 +138,7 @@ xscale1pmu_handle_irq(int irq_num, void *dev)
        unsigned long pmnc;
        struct perf_sample_data data;
        struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
-        struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
        struct pt_regs *regs;
        int idx;
@@ -198,7 +198,7 @@ static void xscale1pmu_enable_event(struct perf_event *event)
        unsigned long val, mask, evt, flags;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        switch (idx) {
@@ -234,7 +234,7 @@ static void xscale1pmu_disable_event(struct perf_event *event)
        unsigned long val, mask, evt, flags;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        switch (idx) {
@@ -287,7 +287,7 @@ xscale1pmu_get_event_idx(struct pmu_hw_events *cpuc,
 static void xscale1pmu_start(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags, val;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        val = xscale1pmu_read_pmnc();
@@ -299,7 +299,7 @@ static void xscale1pmu_start(struct arm_pmu *cpu_pmu)
 static void xscale1pmu_stop(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags, val;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        val = xscale1pmu_read_pmnc();
@@ -485,7 +485,7 @@ xscale2pmu_handle_irq(int irq_num, void *dev)
        unsigned long pmnc, of_flags;
        struct perf_sample_data data;
        struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
-        struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
        struct pt_regs *regs;
        int idx;
@@ -539,7 +539,7 @@ static void xscale2pmu_enable_event(struct perf_event *event)
        unsigned long flags, ien, evtsel;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        ien = xscale2pmu_read_int_enable();
@@ -585,7 +585,7 @@ static void xscale2pmu_disable_event(struct perf_event *event)
        unsigned long flags, ien, evtsel, of_flags;
        struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        int idx = hwc->idx;
        ien = xscale2pmu_read_int_enable();
@@ -651,7 +651,7 @@ out:
 static void xscale2pmu_start(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags, val;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64;
@@ -663,7 +663,7 @@ static void xscale2pmu_start(struct arm_pmu *cpu_pmu)
 static void xscale2pmu_stop(struct arm_pmu *cpu_pmu)
 {
        unsigned long flags, val;
-        struct pmu_hw_events *events = cpu_pmu->get_hw_events();
+        struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
        val = xscale2pmu_read_pmnc();
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 095399618ca5..d0be9a1ef6b8 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -2,6 +2,7 @@ menuconfig ARCH_TEGRA
        bool "NVIDIA Tegra" if ARCH_MULTI_V7
        select ARCH_REQUIRE_GPIOLIB
        select ARCH_SUPPORTS_TRUSTED_FOUNDATIONS
+        select ARM_AMBA
        select ARM_GIC
        select CLKSRC_MMIO
        select HAVE_ARM_SCU if SMP
@@ -59,12 +60,4 @@ config ARCH_TEGRA_124_SOC
          Support for NVIDIA Tegra T124 processor family, based on the
          ARM CortexA15MP CPU
-config TEGRA_AHB
-        bool "Enable AHB driver for NVIDIA Tegra SoCs"
-        default y
-        help
-          Adds AHB configuration functionality for NVIDIA Tegra SoCs,
-          which controls AHB bus master arbitration and some
-          performance parameters(priority, prefech size).
 endif
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7c79c6494379..6caad5428178 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -169,9 +169,6 @@ endmenu
 menu "Bus support"
-config ARM_AMBA
-        bool
 config PCI
        bool "PCI support"
        help
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index f19097134b02..b1fa4e614718 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -104,6 +104,15 @@ static inline void arch_timer_set_cntkctl(u32 cntkctl)
        asm volatile("msr       cntkctl_el1, %0" : : "r" (cntkctl));
 }
+static inline u64 arch_counter_get_cntpct(void)
+{
+        /*
+         * AArch64 kernel and user space mandate the use of CNTVCT.
+         */
+        BUG();
+        return 0;
+}
 static inline u64 arch_counter_get_cntvct(void)
 {
        u64 cval;
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 42632c7a2a4e..9cfa3706a1b8 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -137,13 +137,16 @@ static inline void set_iommu_table_base_and_group(struct device *dev,
        iommu_add_device(dev);
 }
-extern int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
+extern int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
-                        struct scatterlist *sglist, int nelems,
+                            struct scatterlist *sglist, int nelems,
-                        unsigned long mask, enum dma_data_direction direction,
+                            unsigned long mask,
-                        struct dma_attrs *attrs);
+                            enum dma_data_direction direction,
-extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
+                            struct dma_attrs *attrs);
-                           int nelems, enum dma_data_direction direction,
+extern void ppc_iommu_unmap_sg(struct iommu_table *tbl,
-                           struct dma_attrs *attrs);
+                               struct scatterlist *sglist,
+                               int nelems,
+                               enum dma_data_direction direction,
+                               struct dma_attrs *attrs);
 extern void *iommu_alloc_coherent(struct device *dev, struct iommu_table *tbl,
                                  size_t size, dma_addr_t *dma_handle,
diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c
index 54d0116256f7..4c68bfe4108a 100644
--- a/arch/powerpc/kernel/dma-iommu.c
+++ b/arch/powerpc/kernel/dma-iommu.c
@@ -60,16 +60,16 @@ static int dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
                            int nelems, enum dma_data_direction direction,
                            struct dma_attrs *attrs)
 {
-        return iommu_map_sg(dev, get_iommu_table_base(dev), sglist, nelems,
+        return ppc_iommu_map_sg(dev, get_iommu_table_base(dev), sglist, nelems,
-                            device_to_mask(dev), direction, attrs);
+                                device_to_mask(dev), direction, attrs);
 }
 static void dma_iommu_unmap_sg(struct device *dev, struct scatterlist *sglist,
                int nelems, enum dma_data_direction direction,
                struct dma_attrs *attrs)
 {
-        iommu_unmap_sg(get_iommu_table_base(dev), sglist, nelems, direction,
+        ppc_iommu_unmap_sg(get_iommu_table_base(dev), sglist, nelems,
-                       attrs);
+                           direction, attrs);
 }
 /* We support DMA to/from any memory page via the iommu */
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index a10642a0d861..a83cf5ef6488 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -428,10 +428,10 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,
                ppc_md.tce_flush(tbl);
 }
-int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
+int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
-                 struct scatterlist *sglist, int nelems,
+                     struct scatterlist *sglist, int nelems,
-                 unsigned long mask, enum dma_data_direction direction,
+                     unsigned long mask, enum dma_data_direction direction,
-                 struct dma_attrs *attrs)
+                     struct dma_attrs *attrs)
 {
        dma_addr_t dma_next = 0, dma_addr;
        struct scatterlist *s, *outs, *segstart;
@@ -539,7 +539,7 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
        DBG("mapped %d elements:\n", outcount);
-        /* For the sake of iommu_unmap_sg, we clear out the length in the
+        /* For the sake of ppc_iommu_unmap_sg, we clear out the length in the
         * next entry of the sglist if we didn't fill the list completely
         */
        if (outcount < incount) {
@@ -572,9 +572,9 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
 }
-void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
+void ppc_iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
-                int nelems, enum dma_data_direction direction,
+                        int nelems, enum dma_data_direction direction,
-                struct dma_attrs *attrs)
+                        struct dma_attrs *attrs)
 {
        struct scatterlist *sg;
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index 2b90ff8a93be..c7c8720aa39f 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -621,8 +621,9 @@ static int dma_fixed_map_sg(struct device *dev, struct scatterlist *sg,
        if (iommu_fixed_is_weak == dma_get_attr(DMA_ATTR_WEAK_ORDERING, attrs))
                return dma_direct_ops.map_sg(dev, sg, nents, direction, attrs);
        else
-                return iommu_map_sg(dev, cell_get_iommu_table(dev), sg, nents,
+                return ppc_iommu_map_sg(dev, cell_get_iommu_table(dev), sg,
-                                    device_to_mask(dev), direction, attrs);
+                                        nents, device_to_mask(dev),
+                                        direction, attrs);
 }
 static void dma_fixed_unmap_sg(struct device *dev, struct scatterlist *sg,
@@ -632,8 +633,8 @@ static void dma_fixed_unmap_sg(struct device *dev, struct scatterlist *sg,
        if (iommu_fixed_is_weak == dma_get_attr(DMA_ATTR_WEAK_ORDERING, attrs))
                dma_direct_ops.unmap_sg(dev, sg, nents, direction, attrs);
        else
-                iommu_unmap_sg(cell_get_iommu_table(dev), sg, nents, direction,
+                ppc_iommu_unmap_sg(cell_get_iommu_table(dev), sg, nents,
-                               attrs);
+                                   direction, attrs);
 }
 static int dma_fixed_dma_supported(struct device *dev, u64 mask)
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 1a693d3f9d51..af02a8a8ec4a 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -1,5 +1,7 @@
 menu "Device Drivers"
+source "drivers/amba/Kconfig"
 source "drivers/base/Kconfig"
 source "drivers/bus/Kconfig"
diff --git a/drivers/amba/Kconfig b/drivers/amba/Kconfig
new file mode 100644
index 000000000000..4a5c9d279059
--- /dev/null
+++ b/drivers/amba/Kconfig
@@ -0,0 +1,14 @@
+config ARM_AMBA
+        bool
+if ARM_AMBA
+config TEGRA_AHB
+        bool "Enable AHB driver for NVIDIA Tegra SoCs"
+        default y if ARCH_TEGRA
+        help
+          Adds AHB configuration functionality for NVIDIA Tegra SoCs,
+          which controls AHB bus master arbitration and some performance
+          parameters (priority, prefetch size).
+endif
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index 603eb1be4f6a..b99729e36860 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -6,7 +6,7 @@ menu "Bus devices"
 config BRCMSTB_GISB_ARB
        bool "Broadcom STB GISB bus arbiter"
-        depends on ARM
+        depends on ARM || MIPS
        help
          Driver for the Broadcom Set Top Box System-on-a-chip internal bus
          arbiter. This driver provides timeout and target abort error handling
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 7af78df241f2..860da40b78ef 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -16,17 +16,17 @@
 #include <linux/arm-cci.h>
 #include <linux/io.h>
+#include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
+#include <linux/perf_event.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <asm/cacheflush.h>
-#include <asm/irq_regs.h>
-#include <asm/pmu.h>
 #include <asm/smp_plat.h>
 #define DRIVER_NAME             "CCI-400"
@@ -98,6 +98,8 @@ static unsigned long cci_ctrl_phys;
 #define CCI_PMU_CNTR_BASE(idx)  ((idx) * SZ_4K)
+#define CCI_PMU_CNTR_MASK       ((1ULL << 32) -1)
 /*
 * Instead of an event id to monitor CCI cycles, a dedicated counter is
 * provided. Use 0xff to represent CCI cycles and hope that no future revisions
@@ -170,18 +172,29 @@ static char *const pmu_names[] = {
        [CCI_REV_R1] = "CCI_400_r1",
 };
-struct cci_pmu_drv_data {
+struct cci_pmu_hw_events {
+        struct perf_event *events[CCI_PMU_MAX_HW_EVENTS];
+        unsigned long used_mask[BITS_TO_LONGS(CCI_PMU_MAX_HW_EVENTS)];
+        raw_spinlock_t pmu_lock;
+};
+struct cci_pmu {
        void __iomem *base;
-        struct arm_pmu *cci_pmu;
+        struct pmu pmu;
        int nr_irqs;
        int irqs[CCI_PMU_MAX_HW_EVENTS];
        unsigned long active_irqs;
-        struct perf_event *events[CCI_PMU_MAX_HW_EVENTS];
-        unsigned long used_mask[BITS_TO_LONGS(CCI_PMU_MAX_HW_EVENTS)];
        struct pmu_port_event_ranges *port_ranges;
-        struct pmu_hw_events hw_events;
+        struct cci_pmu_hw_events hw_events;
+        struct platform_device *plat_device;
+        int num_events;
+        atomic_t active_events;
+        struct mutex reserve_mutex;
+        cpumask_t cpus;
 };
-static struct cci_pmu_drv_data *pmu;
+static struct cci_pmu *pmu;
+#define to_cci_pmu(c)   (container_of(c, struct cci_pmu, pmu))
 static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
 {
@@ -252,7 +265,7 @@ static int pmu_validate_hw_event(u8 hw_event)
        return -ENOENT;
 }
-static int pmu_is_valid_counter(struct arm_pmu *cci_pmu, int idx)
+static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx)
 {
        return CCI_PMU_CYCLE_CNTR_IDX <= idx &&
                idx <= CCI_PMU_CNTR_LAST(cci_pmu);
@@ -293,14 +306,9 @@ static u32 pmu_get_max_counters(void)
        return n_cnts + 1;
 }
-static struct pmu_hw_events *pmu_get_hw_events(void)
+static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *event)
-{
-        return &pmu->hw_events;
-}
-static int pmu_get_event_idx(struct pmu_hw_events *hw, struct perf_event *event)
 {
-        struct arm_pmu *cci_pmu = to_arm_pmu(event->pmu);
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
        struct hw_perf_event *hw_event = &event->hw;
        unsigned long cci_event = hw_event->config_base & CCI_PMU_EVENT_MASK;
        int idx;
@@ -336,7 +344,7 @@ static int pmu_map_event(struct perf_event *event)
        return mapping;
 }
-static int pmu_request_irq(struct arm_pmu *cci_pmu, irq_handler_t handler)
+static int pmu_request_irq(struct cci_pmu *cci_pmu, irq_handler_t handler)
 {
        int i;
        struct platform_device *pmu_device = cci_pmu->plat_device;
@@ -371,17 +379,91 @@ static int pmu_request_irq(struct arm_pmu *cci_pmu, irq_handler_t handler)
        return 0;
 }
+static void pmu_free_irq(struct cci_pmu *cci_pmu)
+{
+        int i;
+        for (i = 0; i < pmu->nr_irqs; i++) {
+                if (!test_and_clear_bit(i, &pmu->active_irqs))
+                        continue;
+                free_irq(pmu->irqs[i], cci_pmu);
+        }
+}
+static u32 pmu_read_counter(struct perf_event *event)
+{
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
+        struct hw_perf_event *hw_counter = &event->hw;
+        int idx = hw_counter->idx;
+        u32 value;
+        if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
+                dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
+                return 0;
+        }
+        value = pmu_read_register(idx, CCI_PMU_CNTR);
+        return value;
+}
+static void pmu_write_counter(struct perf_event *event, u32 value)
+{
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
+        struct hw_perf_event *hw_counter = &event->hw;
+        int idx = hw_counter->idx;
+        if (unlikely(!pmu_is_valid_counter(cci_pmu, idx)))
+                dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
+        else
+                pmu_write_register(value, idx, CCI_PMU_CNTR);
+}
+static u64 pmu_event_update(struct perf_event *event)
+{
+        struct hw_perf_event *hwc = &event->hw;
+        u64 delta, prev_raw_count, new_raw_count;
+        do {
+                prev_raw_count = local64_read(&hwc->prev_count);
+                new_raw_count = pmu_read_counter(event);
+        } while (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
+                 new_raw_count) != prev_raw_count);
+        delta = (new_raw_count - prev_raw_count) & CCI_PMU_CNTR_MASK;
+        local64_add(delta, &event->count);
+        return new_raw_count;
+}
+static void pmu_read(struct perf_event *event)
+{
+        pmu_event_update(event);
+}
+void pmu_event_set_period(struct perf_event *event)
+{
+        struct hw_perf_event *hwc = &event->hw;
+        /*
+         * The CCI PMU counters have a period of 2^32. To account for the
+         * possiblity of extreme interrupt latency we program for a period of
+         * half that. Hopefully we can handle the interrupt before another 2^31
+         * events occur and the counter overtakes its previous value.
+         */
+        u64 val = 1ULL << 31;
+        local64_set(&hwc->prev_count, val);
+        pmu_write_counter(event, val);
+}
 static irqreturn_t pmu_handle_irq(int irq_num, void *dev)
 {
        unsigned long flags;
-        struct arm_pmu *cci_pmu = (struct arm_pmu *)dev;
+        struct cci_pmu *cci_pmu = dev;
-        struct pmu_hw_events *events = cci_pmu->get_hw_events();
+        struct cci_pmu_hw_events *events = &pmu->hw_events;
-        struct perf_sample_data data;
-        struct pt_regs *regs;
        int idx, handled = IRQ_NONE;
        raw_spin_lock_irqsave(&events->pmu_lock, flags);
-        regs = get_irq_regs();
        /*
         * Iterate over counters and update the corresponding perf events.
         * This should work regardless of whether we have per-counter overflow
@@ -403,154 +485,407 @@ static irqreturn_t pmu_handle_irq(int irq_num, void *dev)
                pmu_write_register(CCI_PMU_OVRFLW_FLAG, idx, CCI_PMU_OVRFLW);
+                pmu_event_update(event);
+                pmu_event_set_period(event);
                handled = IRQ_HANDLED;
-                armpmu_event_update(event);
-                perf_sample_data_init(&data, 0, hw_counter->last_period);
-                if (!armpmu_event_set_period(event))
-                        continue;
-                if (perf_event_overflow(event, &data, regs))
-                        cci_pmu->disable(event);
        }
        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
        return IRQ_RETVAL(handled);
 }
-static void pmu_free_irq(struct arm_pmu *cci_pmu)
+static int cci_pmu_get_hw(struct cci_pmu *cci_pmu)
 {
-        int i;
+        int ret = pmu_request_irq(cci_pmu, pmu_handle_irq);
+        if (ret) {
+                pmu_free_irq(cci_pmu);
+                return ret;
+        }
+        return 0;
+}
-        for (i = 0; i < pmu->nr_irqs; i++) {
+static void cci_pmu_put_hw(struct cci_pmu *cci_pmu)
-                if (!test_and_clear_bit(i, &pmu->active_irqs))
+{
-                        continue;
+        pmu_free_irq(cci_pmu);
+}
-                free_irq(pmu->irqs[i], cci_pmu);
+static void hw_perf_event_destroy(struct perf_event *event)
+{
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
+        atomic_t *active_events = &cci_pmu->active_events;
+        struct mutex *reserve_mutex = &cci_pmu->reserve_mutex;
+        if (atomic_dec_and_mutex_lock(active_events, reserve_mutex)) {
+                cci_pmu_put_hw(cci_pmu);
+                mutex_unlock(reserve_mutex);
        }
 }
-static void pmu_enable_event(struct perf_event *event)
+static void cci_pmu_enable(struct pmu *pmu)
 {
+        struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
+        struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
+        int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_events);
        unsigned long flags;
-        struct arm_pmu *cci_pmu = to_arm_pmu(event->pmu);
+        u32 val;
-        struct pmu_hw_events *events = cci_pmu->get_hw_events();
-        struct hw_perf_event *hw_counter = &event->hw;
+        if (!enabled)
-        int idx = hw_counter->idx;
+                return;
+        raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
+        /* Enable all the PMU counters. */
+        val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
+        writel(val, cci_ctrl_base + CCI_PMCR);
+        raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
+}
+static void cci_pmu_disable(struct pmu *pmu)
+{
+        struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
+        struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
+        unsigned long flags;
+        u32 val;
+        raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
+        /* Disable all the PMU counters. */
+        val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
+        writel(val, cci_ctrl_base + CCI_PMCR);
+        raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
+}
+static void cci_pmu_start(struct perf_event *event, int pmu_flags)
+{
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
+        struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
+        struct hw_perf_event *hwc = &event->hw;
+        int idx = hwc->idx;
+        unsigned long flags;
+        /*
+         * To handle interrupt latency, we always reprogram the period
+         * regardlesss of PERF_EF_RELOAD.
+         */
+        if (pmu_flags & PERF_EF_RELOAD)
+                WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
+        hwc->state = 0;
        if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
                dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
                return;
        }
-        raw_spin_lock_irqsave(&events->pmu_lock, flags);
+        raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
        /* Configure the event to count, unless you are counting cycles */
        if (idx != CCI_PMU_CYCLE_CNTR_IDX)
-                pmu_set_event(idx, hw_counter->config_base);
+                pmu_set_event(idx, hwc->config_base);
+        pmu_event_set_period(event);
        pmu_enable_counter(idx);
-        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+        raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
 }
-static void pmu_disable_event(struct perf_event *event)
+static void cci_pmu_stop(struct perf_event *event, int pmu_flags)
 {
-        struct arm_pmu *cci_pmu = to_arm_pmu(event->pmu);
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
-        struct hw_perf_event *hw_counter = &event->hw;
+        struct hw_perf_event *hwc = &event->hw;
-        int idx = hw_counter->idx;
+        int idx = hwc->idx;
+        if (hwc->state & PERF_HES_STOPPED)
+                return;
        if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
                dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
                return;
        }
+        /*
+         * We always reprogram the counter, so ignore PERF_EF_UPDATE. See
+         * cci_pmu_start()
+         */
        pmu_disable_counter(idx);
+        pmu_event_update(event);
+        hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
 }
-static void pmu_start(struct arm_pmu *cci_pmu)
+static int cci_pmu_add(struct perf_event *event, int flags)
 {
-        u32 val;
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
-        unsigned long flags;
+        struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
-        struct pmu_hw_events *events = cci_pmu->get_hw_events();
+        struct hw_perf_event *hwc = &event->hw;
+        int idx;
+        int err = 0;
-        raw_spin_lock_irqsave(&events->pmu_lock, flags);
+        perf_pmu_disable(event->pmu);
-        /* Enable all the PMU counters. */
+        /* If we don't have a space for the counter then finish early. */
-        val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
+        idx = pmu_get_event_idx(hw_events, event);
-        writel(val, cci_ctrl_base + CCI_PMCR);
+        if (idx < 0) {
+                err = idx;
+                goto out;
+        }
-        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+        event->hw.idx = idx;
+        hw_events->events[idx] = event;
+        hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
+        if (flags & PERF_EF_START)
+                cci_pmu_start(event, PERF_EF_RELOAD);
+        /* Propagate our changes to the userspace mapping. */
+        perf_event_update_userpage(event);
+out:
+        perf_pmu_enable(event->pmu);
+        return err;
 }
-static void pmu_stop(struct arm_pmu *cci_pmu)
+static void cci_pmu_del(struct perf_event *event, int flags)
 {
-        u32 val;
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
-        unsigned long flags;
+        struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
-        struct pmu_hw_events *events = cci_pmu->get_hw_events();
+        struct hw_perf_event *hwc = &event->hw;
+        int idx = hwc->idx;
-        raw_spin_lock_irqsave(&events->pmu_lock, flags);
+        cci_pmu_stop(event, PERF_EF_UPDATE);
+        hw_events->events[idx] = NULL;
+        clear_bit(idx, hw_events->used_mask);
-        /* Disable all the PMU counters. */
+        perf_event_update_userpage(event);
-        val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
+}
-        writel(val, cci_ctrl_base + CCI_PMCR);
-        raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+static int
+validate_event(struct cci_pmu_hw_events *hw_events,
+               struct perf_event *event)
+{
+        if (is_software_event(event))
+                return 1;
+        if (event->state < PERF_EVENT_STATE_OFF)
+                return 1;
+        if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec)
+                return 1;
+        return pmu_get_event_idx(hw_events, event) >= 0;
 }
-static u32 pmu_read_counter(struct perf_event *event)
+static int
+validate_group(struct perf_event *event)
 {
-        struct arm_pmu *cci_pmu = to_arm_pmu(event->pmu);
+        struct perf_event *sibling, *leader = event->group_leader;
-        struct hw_perf_event *hw_counter = &event->hw;
+        struct cci_pmu_hw_events fake_pmu = {
-        int idx = hw_counter->idx;
+                /*
-        u32 value;
+                 * Initialise the fake PMU. We only need to populate the
+                 * used_mask for the purposes of validation.
+                 */
+                .used_mask = CPU_BITS_NONE,
+        };
-        if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
+        if (!validate_event(&fake_pmu, leader))
-                dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
+                return -EINVAL;
-                return 0;
+        list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
+                if (!validate_event(&fake_pmu, sibling))
+                        return -EINVAL;
        }
-        value = pmu_read_register(idx, CCI_PMU_CNTR);
-        return value;
+        if (!validate_event(&fake_pmu, event))
+                return -EINVAL;
+        return 0;
 }
-static void pmu_write_counter(struct perf_event *event, u32 value)
+static int
+__hw_perf_event_init(struct perf_event *event)
 {
-        struct arm_pmu *cci_pmu = to_arm_pmu(event->pmu);
+        struct hw_perf_event *hwc = &event->hw;
-        struct hw_perf_event *hw_counter = &event->hw;
+        int mapping;
-        int idx = hw_counter->idx;
-        if (unlikely(!pmu_is_valid_counter(cci_pmu, idx)))
+        mapping = pmu_map_event(event);
-                dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
-        else
+        if (mapping < 0) {
-                pmu_write_register(value, idx, CCI_PMU_CNTR);
+                pr_debug("event %x:%llx not supported\n", event->attr.type,
+                         event->attr.config);
+                return mapping;
+        }
+        /*
+         * We don't assign an index until we actually place the event onto
+         * hardware. Use -1 to signify that we haven't decided where to put it
+         * yet.
+         */
+        hwc->idx                = -1;
+        hwc->config_base        = 0;
+        hwc->config             = 0;
+        hwc->event_base         = 0;
+        /*
+         * Store the event encoding into the config_base field.
+         */
+        hwc->config_base            |= (unsigned long)mapping;
+        /*
+         * Limit the sample_period to half of the counter width. That way, the
+         * new counter value is far less likely to overtake the previous one
+         * unless you have some serious IRQ latency issues.
+         */
+        hwc->sample_period  = CCI_PMU_CNTR_MASK >> 1;
+        hwc->last_period    = hwc->sample_period;
+        local64_set(&hwc->period_left, hwc->sample_period);
+        if (event->group_leader != event) {
+                if (validate_group(event) != 0)
+                        return -EINVAL;
+        }
+        return 0;
+}
+static int cci_pmu_event_init(struct perf_event *event)
+{
+        struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
+        atomic_t *active_events = &cci_pmu->active_events;
+        int err = 0;
+        int cpu;
+        if (event->attr.type != event->pmu->type)
+                return -ENOENT;
+        /* Shared by all CPUs, no meaningful state to sample */
+        if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
+                return -EOPNOTSUPP;
+        /* We have no filtering of any kind */
+        if (event->attr.exclude_user    ||
+            event->attr.exclude_kernel  ||
+            event->attr.exclude_hv      ||
+            event->attr.exclude_idle    ||
+            event->attr.exclude_host    ||
+            event->attr.exclude_guest)
+                return -EINVAL;
+        /*
+         * Following the example set by other "uncore" PMUs, we accept any CPU
+         * and rewrite its affinity dynamically rather than having perf core
+         * handle cpu == -1 and pid == -1 for this case.
+         *
+         * The perf core will pin online CPUs for the duration of this call and
+         * the event being installed into its context, so the PMU's CPU can't
+         * change under our feet.
+         */
+        cpu = cpumask_first(&cci_pmu->cpus);
+        if (event->cpu < 0 || cpu < 0)
+                return -EINVAL;
+        event->cpu = cpu;
+        event->destroy = hw_perf_event_destroy;
+        if (!atomic_inc_not_zero(active_events)) {
+                mutex_lock(&cci_pmu->reserve_mutex);
+                if (atomic_read(active_events) == 0)
+                        err = cci_pmu_get_hw(cci_pmu);
+                if (!err)
+                        atomic_inc(active_events);
+                mutex_unlock(&cci_pmu->reserve_mutex);
+        }
+        if (err)
+                return err;
+        err = __hw_perf_event_init(event);
+        if (err)
+                hw_perf_event_destroy(event);
+        return err;
 }
-static int cci_pmu_init(struct arm_pmu *cci_pmu, struct platform_device *pdev)
+static ssize_t pmu_attr_cpumask_show(struct device *dev,
+                                     struct device_attribute *attr, char *buf)
 {
-        *cci_pmu = (struct arm_pmu){
+        int n = cpulist_scnprintf(buf, PAGE_SIZE - 2, &pmu->cpus);
-                .name             = pmu_names[probe_cci_revision()],
-                .max_period       = (1LLU << 32) - 1,
+        buf[n++] = '\n';
-                .get_hw_events    = pmu_get_hw_events,
+        buf[n] = '\0';
-                .get_event_idx    = pmu_get_event_idx,
+        return n;
-                .map_event        = pmu_map_event,
+}
-                .request_irq      = pmu_request_irq,
-                .handle_irq       = pmu_handle_irq,
+static DEVICE_ATTR(cpumask, S_IRUGO, pmu_attr_cpumask_show, NULL);
-                .free_irq         = pmu_free_irq,
-                .enable           = pmu_enable_event,
+static struct attribute *pmu_attrs[] = {
-                .disable          = pmu_disable_event,
+        &dev_attr_cpumask.attr,
-                .start            = pmu_start,
+        NULL,
-                .stop             = pmu_stop,
+};
-                .read_counter     = pmu_read_counter,
-                .write_counter    = pmu_write_counter,
+static struct attribute_group pmu_attr_group = {
+        .attrs = pmu_attrs,
+};
+static const struct attribute_group *pmu_attr_groups[] = {
+        &pmu_attr_group,
+        NULL
+};
+static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
+{
+        char *name = pmu_names[probe_cci_revision()];
+        cci_pmu->pmu = (struct pmu) {
+                .name           = pmu_names[probe_cci_revision()],
+                .task_ctx_nr    = perf_invalid_context,
+                .pmu_enable     = cci_pmu_enable,
+                .pmu_disable    = cci_pmu_disable,
+                .event_init     = cci_pmu_event_init,
+                .add            = cci_pmu_add,
+                .del            = cci_pmu_del,
+                .start          = cci_pmu_start,
+                .stop           = cci_pmu_stop,
+                .read           = pmu_read,
+                .attr_groups    = pmu_attr_groups,
        };
        cci_pmu->plat_device = pdev;
        cci_pmu->num_events = pmu_get_max_counters();
-        return armpmu_register(cci_pmu, -1);
+        return perf_pmu_register(&cci_pmu->pmu, name, -1);
 }
+static int cci_pmu_cpu_notifier(struct notifier_block *self,
+                                unsigned long action, void *hcpu)
+{
+        unsigned int cpu = (long)hcpu;
+        unsigned int target;
+        switch (action & ~CPU_TASKS_FROZEN) {
+        case CPU_DOWN_PREPARE:
+                if (!cpumask_test_and_clear_cpu(cpu, &pmu->cpus))
+                        break;
+                target = cpumask_any_but(cpu_online_mask, cpu);
+                if (target < 0) // UP, last CPU
+                        break;
+                /*
+                 * TODO: migrate context once core races on event->ctx have
+                 * been fixed.
+                 */
+                cpumask_set_cpu(target, &pmu->cpus);
+        default:
+                break;
+        }
+        return NOTIFY_OK;
+}
+static struct notifier_block cci_pmu_cpu_nb = {
+        .notifier_call  = cci_pmu_cpu_notifier,
+        /*
+         * to migrate uncore events, our notifier should be executed
+         * before perf core's notifier.
+         */
+        .priority       = CPU_PRI_PERF + 1,
+};
 static const struct of_device_id arm_cci_pmu_matches[] = {
        {
                .compatible = "arm,cci-400-pmu",
@@ -604,15 +939,16 @@ static int cci_pmu_probe(struct platform_device *pdev)
                return -EINVAL;
        }
-        pmu->cci_pmu = devm_kzalloc(&pdev->dev, sizeof(*(pmu->cci_pmu)), GFP_KERNEL);
-        if (!pmu->cci_pmu)
-                return -ENOMEM;
-        pmu->hw_events.events = pmu->events;
-        pmu->hw_events.used_mask = pmu->used_mask;
        raw_spin_lock_init(&pmu->hw_events.pmu_lock);
+        mutex_init(&pmu->reserve_mutex);
+        atomic_set(&pmu->active_events, 0);
+        cpumask_set_cpu(smp_processor_id(), &pmu->cpus);
+        ret = register_cpu_notifier(&cci_pmu_cpu_nb);
+        if (ret)
+                return ret;
-        ret = cci_pmu_init(pmu->cci_pmu, pdev);
+        ret = cci_pmu_init(pmu, pdev);
        if (ret)
                return ret;
diff --git a/drivers/bus/brcmstb_gisb.c b/drivers/bus/brcmstb_gisb.c
index e7ccd21a45c9..46de8dc39eb4 100644
--- a/drivers/bus/brcmstb_gisb.c
+++ b/drivers/bus/brcmstb_gisb.c
@@ -25,26 +25,72 @@
 #include <linux/bitops.h>
 #include <linux/pm.h>
+#ifdef CONFIG_ARM
 #include <asm/bug.h>
 #include <asm/signal.h>
+#endif
-#define ARB_TIMER                       0x008
-#define ARB_ERR_CAP_CLR                 0x7e4
 #define  ARB_ERR_CAP_CLEAR              (1 << 0)
-#define ARB_ERR_CAP_HI_ADDR             0x7e8
-#define ARB_ERR_CAP_ADDR                0x7ec
-#define ARB_ERR_CAP_DATA                0x7f0
-#define ARB_ERR_CAP_STATUS              0x7f4
 #define  ARB_ERR_CAP_STATUS_TIMEOUT     (1 << 12)
 #define  ARB_ERR_CAP_STATUS_TEA         (1 << 11)
 #define  ARB_ERR_CAP_STATUS_BS_SHIFT    (1 << 2)
 #define  ARB_ERR_CAP_STATUS_BS_MASK     0x3c
 #define  ARB_ERR_CAP_STATUS_WRITE       (1 << 1)
 #define  ARB_ERR_CAP_STATUS_VALID       (1 << 0)
-#define ARB_ERR_CAP_MASTER              0x7f8
+enum {
+        ARB_TIMER,
+        ARB_ERR_CAP_CLR,
+        ARB_ERR_CAP_HI_ADDR,
+        ARB_ERR_CAP_ADDR,
+        ARB_ERR_CAP_DATA,
+        ARB_ERR_CAP_STATUS,
+        ARB_ERR_CAP_MASTER,
+};
+static const int gisb_offsets_bcm7038[] = {
+        [ARB_TIMER]             = 0x00c,
+        [ARB_ERR_CAP_CLR]       = 0x0c4,
+        [ARB_ERR_CAP_HI_ADDR]   = -1,
+        [ARB_ERR_CAP_ADDR]      = 0x0c8,
+        [ARB_ERR_CAP_DATA]      = 0x0cc,
+        [ARB_ERR_CAP_STATUS]    = 0x0d0,
+        [ARB_ERR_CAP_MASTER]    = -1,
+};
+static const int gisb_offsets_bcm7400[] = {
+        [ARB_TIMER]             = 0x00c,
+        [ARB_ERR_CAP_CLR]       = 0x0c8,
+        [ARB_ERR_CAP_HI_ADDR]   = -1,
+        [ARB_ERR_CAP_ADDR]      = 0x0cc,
+        [ARB_ERR_CAP_DATA]      = 0x0d0,
+        [ARB_ERR_CAP_STATUS]    = 0x0d4,
+        [ARB_ERR_CAP_MASTER]    = 0x0d8,
+};
+static const int gisb_offsets_bcm7435[] = {
+        [ARB_TIMER]             = 0x00c,
+        [ARB_ERR_CAP_CLR]       = 0x168,
+        [ARB_ERR_CAP_HI_ADDR]   = -1,
+        [ARB_ERR_CAP_ADDR]      = 0x16c,
+        [ARB_ERR_CAP_DATA]      = 0x170,
+        [ARB_ERR_CAP_STATUS]    = 0x174,
+        [ARB_ERR_CAP_MASTER]    = 0x178,
+};
+static const int gisb_offsets_bcm7445[] = {
+        [ARB_TIMER]             = 0x008,
+        [ARB_ERR_CAP_CLR]       = 0x7e4,
+        [ARB_ERR_CAP_HI_ADDR]   = 0x7e8,
+        [ARB_ERR_CAP_ADDR]      = 0x7ec,
+        [ARB_ERR_CAP_DATA]      = 0x7f0,
+        [ARB_ERR_CAP_STATUS]    = 0x7f4,
+        [ARB_ERR_CAP_MASTER]    = 0x7f8,
+};
 struct brcmstb_gisb_arb_device {
        void __iomem    *base;
+        const int       *gisb_offsets;
        struct mutex    lock;
        struct list_head next;
        u32 valid_mask;
@@ -54,6 +100,26 @@ struct brcmstb_gisb_arb_device {
 static LIST_HEAD(brcmstb_gisb_arb_device_list);
+static u32 gisb_read(struct brcmstb_gisb_arb_device *gdev, int reg)
+{
+        int offset = gdev->gisb_offsets[reg];
+        /* return 1 if the hardware doesn't have ARB_ERR_CAP_MASTER */
+        if (offset == -1)
+                return 1;
+        return ioread32(gdev->base + offset);
+}
+static void gisb_write(struct brcmstb_gisb_arb_device *gdev, u32 val, int reg)
+{
+        int offset = gdev->gisb_offsets[reg];
+        if (offset == -1)
+                return;
+        iowrite32(val, gdev->base + reg);
+}
 static ssize_t gisb_arb_get_timeout(struct device *dev,
                                    struct device_attribute *attr,
                                    char *buf)
@@ -63,7 +129,7 @@ static ssize_t gisb_arb_get_timeout(struct device *dev,
        u32 timeout;
        mutex_lock(&gdev->lock);
-        timeout = ioread32(gdev->base + ARB_TIMER);
+        timeout = gisb_read(gdev, ARB_TIMER);
        mutex_unlock(&gdev->lock);
        return sprintf(buf, "%d", timeout);
@@ -85,7 +151,7 @@ static ssize_t gisb_arb_set_timeout(struct device *dev,
                return -EINVAL;
        mutex_lock(&gdev->lock);
-        iowrite32(val, gdev->base + ARB_TIMER);
+        gisb_write(gdev, val, ARB_TIMER);
        mutex_unlock(&gdev->lock);
        return count;
@@ -112,18 +178,18 @@ static int brcmstb_gisb_arb_decode_addr(struct brcmstb_gisb_arb_device *gdev,
        const char *m_name;
        char m_fmt[11];
-        cap_status = ioread32(gdev->base + ARB_ERR_CAP_STATUS);
+        cap_status = gisb_read(gdev, ARB_ERR_CAP_STATUS);
        /* Invalid captured address, bail out */
        if (!(cap_status & ARB_ERR_CAP_STATUS_VALID))
                return 1;
        /* Read the address and master */
-        arb_addr = ioread32(gdev->base + ARB_ERR_CAP_ADDR) & 0xffffffff;
+        arb_addr = gisb_read(gdev, ARB_ERR_CAP_ADDR) & 0xffffffff;
 #if (IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT))
-        arb_addr |= (u64)ioread32(gdev->base + ARB_ERR_CAP_HI_ADDR) << 32;
+        arb_addr |= (u64)gisb_read(gdev, ARB_ERR_CAP_HI_ADDR) << 32;
 #endif
-        master = ioread32(gdev->base + ARB_ERR_CAP_MASTER);
+        master = gisb_read(gdev, ARB_ERR_CAP_MASTER);
        m_name = brcmstb_gisb_master_to_str(gdev, master);
        if (!m_name) {
@@ -138,11 +204,12 @@ static int brcmstb_gisb_arb_decode_addr(struct brcmstb_gisb_arb_device *gdev,
                m_name);
        /* clear the GISB error */
-        iowrite32(ARB_ERR_CAP_CLEAR, gdev->base + ARB_ERR_CAP_CLR);
+        gisb_write(gdev, ARB_ERR_CAP_CLEAR, ARB_ERR_CAP_CLR);
        return 0;
 }
+#ifdef CONFIG_ARM
 static int brcmstb_bus_error_handler(unsigned long addr, unsigned int fsr,
                                     struct pt_regs *regs)
 {
@@ -161,6 +228,7 @@ static int brcmstb_bus_error_handler(unsigned long addr, unsigned int fsr,
        return ret;
 }
+#endif
 static irqreturn_t brcmstb_gisb_timeout_handler(int irq, void *dev_id)
 {
@@ -188,10 +256,20 @@ static struct attribute_group gisb_arb_sysfs_attr_group = {
        .attrs = gisb_arb_sysfs_attrs,
 };
-static int brcmstb_gisb_arb_probe(struct platform_device *pdev)
+static const struct of_device_id brcmstb_gisb_arb_of_match[] = {
+        { .compatible = "brcm,gisb-arb",         .data = gisb_offsets_bcm7445 },
+        { .compatible = "brcm,bcm7445-gisb-arb", .data = gisb_offsets_bcm7445 },
+        { .compatible = "brcm,bcm7435-gisb-arb", .data = gisb_offsets_bcm7435 },
+        { .compatible = "brcm,bcm7400-gisb-arb", .data = gisb_offsets_bcm7400 },
+        { .compatible = "brcm,bcm7038-gisb-arb", .data = gisb_offsets_bcm7038 },
+        { },
+};
+static int __init brcmstb_gisb_arb_probe(struct platform_device *pdev)
 {
        struct device_node *dn = pdev->dev.of_node;
        struct brcmstb_gisb_arb_device *gdev;
+        const struct of_device_id *of_id;
        struct resource *r;
        int err, timeout_irq, tea_irq;
        unsigned int num_masters, j = 0;
@@ -212,6 +290,13 @@ static int brcmstb_gisb_arb_probe(struct platform_device *pdev)
        if (IS_ERR(gdev->base))
                return PTR_ERR(gdev->base);
+        of_id = of_match_node(brcmstb_gisb_arb_of_match, dn);
+        if (!of_id) {
+                pr_err("failed to look up compatible string\n");
+                return -EINVAL;
+        }
+        gdev->gisb_offsets = of_id->data;
        err = devm_request_irq(&pdev->dev, timeout_irq,
                                brcmstb_gisb_timeout_handler, 0, pdev->name,
                                gdev);
@@ -257,8 +342,10 @@ static int brcmstb_gisb_arb_probe(struct platform_device *pdev)
        list_add_tail(&gdev->next, &brcmstb_gisb_arb_device_list);
+#ifdef CONFIG_ARM
        hook_fault_code(22, brcmstb_bus_error_handler, SIGBUS, 0,
                        "imprecise external abort");
+#endif
        dev_info(&pdev->dev, "registered mem: %p, irqs: %d, %d\n",
                        gdev->base, timeout_irq, tea_irq);
@@ -272,7 +359,7 @@ static int brcmstb_gisb_arb_suspend(struct device *dev)
        struct platform_device *pdev = to_platform_device(dev);
        struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
-        gdev->saved_timeout = ioread32(gdev->base + ARB_TIMER);
+        gdev->saved_timeout = gisb_read(gdev, ARB_TIMER);
        return 0;
 }
@@ -285,7 +372,7 @@ static int brcmstb_gisb_arb_resume_noirq(struct device *dev)
        struct platform_device *pdev = to_platform_device(dev);
        struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
-        iowrite32(gdev->saved_timeout, gdev->base + ARB_TIMER);
+        gisb_write(gdev, gdev->saved_timeout, ARB_TIMER);
        return 0;
 }
@@ -299,13 +386,7 @@ static const struct dev_pm_ops brcmstb_gisb_arb_pm_ops = {
        .resume_noirq   = brcmstb_gisb_arb_resume_noirq,
 };
-static const struct of_device_id brcmstb_gisb_arb_of_match[] = {
-        { .compatible = "brcm,gisb-arb" },
-        { },
-};
 static struct platform_driver brcmstb_gisb_arb_driver = {
-        .probe  = brcmstb_gisb_arb_probe,
        .driver = {
                .name   = "brcm-gisb-arb",
                .owner  = THIS_MODULE,
@@ -316,7 +397,8 @@ static struct platform_driver brcmstb_gisb_arb_driver = {
 static int __init brcm_gisb_driver_init(void)
 {
-        return platform_driver_register(&brcmstb_gisb_arb_driver);
+        return platform_driver_probe(&brcmstb_gisb_arb_driver,
+                                     brcmstb_gisb_arb_probe);
 }
 module_init(brcm_gisb_driver_init);
diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
index 531ae591783b..17d86595951c 100644
--- a/drivers/bus/omap_l3_noc.c
+++ b/drivers/bus/omap_l3_noc.c
@@ -222,10 +222,14 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
                        }
                        /* Error found so break the for loop */
-                        break;
+                        return IRQ_HANDLED;
                }
        }
-        return IRQ_HANDLED;
+        dev_err(l3->dev, "L3 %s IRQ not handled!!\n",
+                inttype ? "debug" : "application");
+        return IRQ_NONE;
 }
 static const struct of_device_id l3_noc_match[] = {
@@ -296,11 +300,66 @@ static int omap_l3_probe(struct platform_device *pdev)
        return ret;
 }
+#ifdef  CONFIG_PM
+/**
+ * l3_resume_noirq() - resume function for l3_noc
+ * @dev:        pointer to l3_noc device structure
+ *
+ * We only have the resume handler only since we
+ * have already maintained the delta register
+ * configuration as part of configuring the system
+ */
+static int l3_resume_noirq(struct device *dev)
+{
+        struct omap_l3 *l3 = dev_get_drvdata(dev);
+        int i;
+        struct l3_flagmux_data *flag_mux;
+        void __iomem *base, *mask_regx = NULL;
+        u32 mask_val;
+        for (i = 0; i < l3->num_modules; i++) {
+                base = l3->l3_base[i];
+                flag_mux = l3->l3_flagmux[i];
+                if (!flag_mux->mask_app_bits && !flag_mux->mask_dbg_bits)
+                        continue;
+                mask_regx = base + flag_mux->offset + L3_FLAGMUX_MASK0 +
+                           (L3_APPLICATION_ERROR << 3);
+                mask_val = readl_relaxed(mask_regx);
+                mask_val &= ~(flag_mux->mask_app_bits);
+                writel_relaxed(mask_val, mask_regx);
+                mask_regx = base + flag_mux->offset + L3_FLAGMUX_MASK0 +
+                           (L3_DEBUG_ERROR << 3);
+                mask_val = readl_relaxed(mask_regx);
+                mask_val &= ~(flag_mux->mask_dbg_bits);
+                writel_relaxed(mask_val, mask_regx);
+        }
+        /* Dummy read to force OCP barrier */
+        if (mask_regx)
+                (void)readl(mask_regx);
+        return 0;
+}
+static const struct dev_pm_ops l3_dev_pm_ops = {
+        .resume_noirq           = l3_resume_noirq,
+};
+#define L3_DEV_PM_OPS (&l3_dev_pm_ops)
+#else
+#define L3_DEV_PM_OPS NULL
+#endif
 static struct platform_driver omap_l3_driver = {
        .probe          = omap_l3_probe,
        .driver         = {
                .name           = "omap_l3_noc",
                .owner          = THIS_MODULE,
+                .pm             = L3_DEV_PM_OPS,
                .of_match_table = of_match_ptr(l3_noc_match),
        },
 };
diff --git a/drivers/clk/tegra/clk-divider.c b/drivers/clk/tegra/clk-divider.c
index 290f9c1a3749..59a5714dfe18 100644
--- a/drivers/clk/tegra/clk-divider.c
+++ b/drivers/clk/tegra/clk-divider.c
@@ -185,3 +185,16 @@ struct clk *tegra_clk_register_divider(const char *name,
        return clk;
 }
+static const struct clk_div_table mc_div_table[] = {
+        { .val = 0, .div = 2 },
+        { .val = 1, .div = 1 },
+        { .val = 0, .div = 0 },
+};
+struct clk *tegra_clk_register_mc(const char *name, const char *parent_name,
+                                  void __iomem *reg, spinlock_t *lock)
+{
+        return clk_register_divider_table(NULL, name, parent_name, 0, reg,
+                                          16, 1, 0, mc_div_table, lock);
+}
diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c
index f760f31d05c4..0b03d2cf7264 100644
--- a/drivers/clk/tegra/clk-tegra114.c
+++ b/drivers/clk/tegra/clk-tegra114.c
@@ -173,6 +173,7 @@ static DEFINE_SPINLOCK(pll_d_lock);
 static DEFINE_SPINLOCK(pll_d2_lock);
 static DEFINE_SPINLOCK(pll_u_lock);
 static DEFINE_SPINLOCK(pll_re_lock);
+static DEFINE_SPINLOCK(emc_lock);
 static struct div_nmp pllxc_nmp = {
        .divm_shift = 0,
@@ -1228,7 +1229,11 @@ static __init void tegra114_periph_clk_init(void __iomem *clk_base,
                               ARRAY_SIZE(mux_pllmcp_clkm),
                               CLK_SET_RATE_NO_REPARENT,
                               clk_base + CLK_SOURCE_EMC,
-                               29, 3, 0, NULL);
+                               29, 3, 0, &emc_lock);
+        clk = tegra_clk_register_mc("mc", "emc_mux", clk_base + CLK_SOURCE_EMC,
+                                    &emc_lock);
+        clks[TEGRA114_CLK_MC] = clk;
        for (i = 0; i < ARRAY_SIZE(tegra_periph_clk_list); i++) {
                data = &tegra_periph_clk_list[i];
diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c
index e3a85842ce0c..f5f9baca7bb6 100644
--- a/drivers/clk/tegra/clk-tegra124.c
+++ b/drivers/clk/tegra/clk-tegra124.c
@@ -132,6 +132,7 @@ static DEFINE_SPINLOCK(pll_d2_lock);
 static DEFINE_SPINLOCK(pll_e_lock);
 static DEFINE_SPINLOCK(pll_re_lock);
 static DEFINE_SPINLOCK(pll_u_lock);
+static DEFINE_SPINLOCK(emc_lock);
 /* possible OSC frequencies in Hz */
 static unsigned long tegra124_input_freq[] = {
@@ -1127,7 +1128,11 @@ static __init void tegra124_periph_clk_init(void __iomem *clk_base,
        clk = clk_register_mux(NULL, "emc_mux", mux_pllmcp_clkm,
                               ARRAY_SIZE(mux_pllmcp_clkm), 0,
                               clk_base + CLK_SOURCE_EMC,
-                               29, 3, 0, NULL);
+                               29, 3, 0, &emc_lock);
+        clk = tegra_clk_register_mc("mc", "emc_mux", clk_base + CLK_SOURCE_EMC,
+                                    &emc_lock);
+        clks[TEGRA124_CLK_MC] = clk;
        /* cml0 */
        clk = clk_register_gate(NULL, "cml0", "pll_e", 0, clk_base + PLLE_AUX,
diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c
index dace2b1b5ae6..41272dcc9e22 100644
--- a/drivers/clk/tegra/clk-tegra20.c
+++ b/drivers/clk/tegra/clk-tegra20.c
@@ -140,6 +140,8 @@ static struct cpu_clk_suspend_context {
 static void __iomem *clk_base;
 static void __iomem *pmc_base;
+static DEFINE_SPINLOCK(emc_lock);
 #define TEGRA_INIT_DATA_MUX(_name, _parents, _offset,   \
                            _clk_num, _gate_flags, _clk_id)     \
        TEGRA_INIT_DATA(_name, NULL, NULL, _parents, _offset,   \
@@ -819,11 +821,15 @@ static void __init tegra20_periph_clk_init(void)
                               ARRAY_SIZE(mux_pllmcp_clkm),
                               CLK_SET_RATE_NO_REPARENT,
                               clk_base + CLK_SOURCE_EMC,
-                               30, 2, 0, NULL);
+                               30, 2, 0, &emc_lock);
        clk = tegra_clk_register_periph_gate("emc", "emc_mux", 0, clk_base, 0,
                                    57, periph_clk_enb_refcnt);
        clks[TEGRA20_CLK_EMC] = clk;
+        clk = tegra_clk_register_mc("mc", "emc_mux", clk_base + CLK_SOURCE_EMC,
+                                    &emc_lock);
+        clks[TEGRA20_CLK_MC] = clk;
        /* dsi */
        clk = tegra_clk_register_periph_gate("dsi", "pll_d", 0, clk_base, 0,
                                    48, periph_clk_enb_refcnt);
diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
index 5bbacd01094f..4b9d8bd3d0bf 100644
--- a/drivers/clk/tegra/clk-tegra30.c
+++ b/drivers/clk/tegra/clk-tegra30.c
@@ -177,6 +177,7 @@ static unsigned long input_freq;
 static DEFINE_SPINLOCK(cml_lock);
 static DEFINE_SPINLOCK(pll_d_lock);
+static DEFINE_SPINLOCK(emc_lock);
 #define TEGRA_INIT_DATA_MUX(_name, _parents, _offset,   \
                            _clk_num, _gate_flags, _clk_id)     \
@@ -1157,11 +1158,15 @@ static void __init tegra30_periph_clk_init(void)
                               ARRAY_SIZE(mux_pllmcp_clkm),
                               CLK_SET_RATE_NO_REPARENT,
                               clk_base + CLK_SOURCE_EMC,
-                               30, 2, 0, NULL);
+                               30, 2, 0, &emc_lock);
        clk = tegra_clk_register_periph_gate("emc", "emc_mux", 0, clk_base, 0,
                                    57, periph_clk_enb_refcnt);
        clks[TEGRA30_CLK_EMC] = clk;
+        clk = tegra_clk_register_mc("mc", "emc_mux", clk_base + CLK_SOURCE_EMC,
+                                    &emc_lock);
+        clks[TEGRA30_CLK_MC] = clk;
        /* cml0 */
        clk = clk_register_gate(NULL, "cml0", "pll_e", 0, clk_base + PLLE_AUX,
                                0, 0, &cml_lock);
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
index 16ec8d6bb87f..4e458aa8d45c 100644
--- a/drivers/clk/tegra/clk.h
+++ b/drivers/clk/tegra/clk.h
@@ -86,6 +86,8 @@ struct clk *tegra_clk_register_divider(const char *name,
                const char *parent_name, void __iomem *reg,
                unsigned long flags, u8 clk_divider_flags, u8 shift, u8 width,
                u8 frac_width, spinlock_t *lock);
+struct clk *tegra_clk_register_mc(const char *name, const char *parent_name,
+                                  void __iomem *reg, spinlock_t *lock);
 /*
 * Tegra PLL:
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 43005d4d3348..6a79fc4f900c 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -462,7 +462,10 @@ static void __init arch_counter_register(unsigned type)
        /* Register the CP15 based counter if we have one */
        if (type & ARCH_CP15_TIMER) {
-                arch_timer_read_counter = arch_counter_get_cntvct;
+                if (arch_timer_use_virtual)
+                        arch_timer_read_counter = arch_counter_get_cntvct;
+                else
+                        arch_timer_read_counter = arch_counter_get_cntpct;
        } else {
                arch_timer_read_counter = arch_counter_get_cntvct_mem;
@@ -702,6 +705,14 @@ static void __init arch_timer_init(struct device_node *np)
        arch_timer_detect_rate(NULL, np);
        /*
+         * If we cannot rely on firmware initializing the timer registers then
+         * we should use the physical timers instead.
+         */
+        if (IS_ENABLED(CONFIG_ARM) &&
+            of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))
+                        arch_timer_use_virtual = false;
+        /*
         * If HYP mode is available, we know that the physical timer
         * has been configured to be accessible from PL1. Use it, so
         * that a guest can use the virtual timer instead.
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index dd5112265cc9..6dbfbc209491 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -163,14 +163,14 @@ config TEGRA_IOMMU_GART
          hardware included on Tegra SoCs.
 config TEGRA_IOMMU_SMMU
-        bool "Tegra SMMU IOMMU Support"
+        bool "NVIDIA Tegra SMMU Support"
-        depends on ARCH_TEGRA && TEGRA_AHB
+        depends on ARCH_TEGRA
+        depends on TEGRA_AHB
+        depends on TEGRA_MC
        select IOMMU_API
        help
-          Enables support for remapping discontiguous physical memory
+          This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
-          shared with the operating system into contiguous I/O virtual
+          SoCs (Tegra30 up to Tegra124).
-          space through the SMMU (System Memory Management Unit)
-          hardware included on Tegra SoCs.
 config EXYNOS_IOMMU
        bool "Exynos IOMMU Support"
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 505a9adac2d5..2d84c9edf3b8 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3424,6 +3424,7 @@ static const struct iommu_ops amd_iommu_ops = {
        .detach_dev = amd_iommu_detach_device,
        .map = amd_iommu_map,
        .unmap = amd_iommu_unmap,
+        .map_sg = default_iommu_map_sg,
        .iova_to_phys = amd_iommu_iova_to_phys,
        .pgsize_bitmap  = AMD_IOMMU_PGSIZES,
 };
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 60558f794922..e393ae01b5d2 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1652,6 +1652,7 @@ static const struct iommu_ops arm_smmu_ops = {
        .detach_dev     = arm_smmu_detach_dev,
        .map            = arm_smmu_map,
        .unmap          = arm_smmu_unmap,
+        .map_sg         = default_iommu_map_sg,
        .iova_to_phys   = arm_smmu_iova_to_phys,
        .add_device     = arm_smmu_add_device,
        .remove_device  = arm_smmu_remove_device,
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 74233186f6f7..28372b85d8da 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1178,6 +1178,7 @@ static const struct iommu_ops exynos_iommu_ops = {
        .detach_dev = exynos_iommu_detach_device,
        .map = exynos_iommu_map,
        .unmap = exynos_iommu_unmap,
+        .map_sg = default_iommu_map_sg,
        .iova_to_phys = exynos_iommu_iova_to_phys,
        .add_device = exynos_iommu_add_device,
        .remove_device = exynos_iommu_remove_device,
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a27d6cb1a793..02cd26a17fe0 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4467,6 +4467,7 @@ static const struct iommu_ops intel_iommu_ops = {
        .detach_dev     = intel_iommu_detach_device,
        .map            = intel_iommu_map,
        .unmap          = intel_iommu_unmap,
+        .map_sg         = default_iommu_map_sg,
        .iova_to_phys   = intel_iommu_iova_to_phys,
        .add_device     = intel_iommu_add_device,
        .remove_device  = intel_iommu_remove_device,
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index ed8b04867b1f..02e4313e937c 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -818,7 +818,15 @@ static int iommu_bus_init(struct bus_type *bus, const struct iommu_ops *ops)
                kfree(nb);
                return err;
        }
-        return bus_for_each_dev(bus, NULL, &cb, add_iommu_group);
+        err = bus_for_each_dev(bus, NULL, &cb, add_iommu_group);
+        if (err) {
+                bus_unregister_notifier(bus, nb);
+                kfree(nb);
+                return err;
+        }
+        return 0;
 }
 /**
@@ -836,13 +844,19 @@ static int iommu_bus_init(struct bus_type *bus, const struct iommu_ops *ops)
 */
 int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops)
 {
+        int err;
        if (bus->iommu_ops != NULL)
                return -EBUSY;
        bus->iommu_ops = ops;
        /* Do IOMMU specific setup for this bus-type */
-        return iommu_bus_init(bus, ops);
+        err = iommu_bus_init(bus, ops);
+        if (err)
+                bus->iommu_ops = NULL;
+        return err;
 }
 EXPORT_SYMBOL_GPL(bus_set_iommu);
@@ -1124,6 +1138,38 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
 }
 EXPORT_SYMBOL_GPL(iommu_unmap);
+size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
+                         struct scatterlist *sg, unsigned int nents, int prot)
+{
+        struct scatterlist *s;
+        size_t mapped = 0;
+        unsigned int i;
+        int ret;
+        for_each_sg(sg, s, nents, i) {
+                phys_addr_t phys = page_to_phys(sg_page(s));
+                /* We are mapping on page boundarys, so offset must be 0 */
+                if (s->offset)
+                        goto out_err;
+                ret = iommu_map(domain, iova + mapped, phys, s->length, prot);
+                if (ret)
+                        goto out_err;
+                mapped += s->length;
+        }
+        return mapped;
+out_err:
+        /* undo mappings already done */
+        iommu_unmap(domain, iova, mapped);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(default_iommu_map_sg);
 int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
                               phys_addr_t paddr, u64 size, int prot)
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 7dab5cbcc775..e509c58eee92 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -1127,6 +1127,7 @@ static const struct iommu_ops ipmmu_ops = {
        .detach_dev = ipmmu_detach_device,
        .map = ipmmu_map,
        .unmap = ipmmu_unmap,
+        .map_sg = default_iommu_map_sg,
        .iova_to_phys = ipmmu_iova_to_phys,
        .add_device = ipmmu_add_device,
        .remove_device = ipmmu_remove_device,
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index 6e3dcc289d59..1c7b78ecf3e3 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -681,6 +681,7 @@ static const struct iommu_ops msm_iommu_ops = {
        .detach_dev = msm_iommu_detach_dev,
        .map = msm_iommu_map,
        .unmap = msm_iommu_unmap,
+        .map_sg = default_iommu_map_sg,
        .iova_to_phys = msm_iommu_iova_to_phys,
        .pgsize_bitmap = MSM_IOMMU_PGSIZES,
 };
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 36278870e84a..18003c044454 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1288,6 +1288,7 @@ static const struct iommu_ops omap_iommu_ops = {
        .detach_dev     = omap_iommu_detach_dev,
        .map            = omap_iommu_map,
        .unmap          = omap_iommu_unmap,
+        .map_sg         = default_iommu_map_sg,
        .iova_to_phys   = omap_iommu_iova_to_phys,
        .add_device     = omap_iommu_add_device,
        .remove_device  = omap_iommu_remove_device,
diff --git a/drivers/iommu/shmobile-iommu.c b/drivers/iommu/shmobile-iommu.c
index 1333e6fb3405..f1b00774e4de 100644
--- a/drivers/iommu/shmobile-iommu.c
+++ b/drivers/iommu/shmobile-iommu.c
@@ -361,6 +361,7 @@ static const struct iommu_ops shmobile_iommu_ops = {
        .detach_dev = shmobile_iommu_detach_device,
        .map = shmobile_iommu_map,
        .unmap = shmobile_iommu_unmap,
+        .map_sg = default_iommu_map_sg,
        .iova_to_phys = shmobile_iommu_iova_to_phys,
        .add_device = shmobile_iommu_add_device,
        .pgsize_bitmap = SZ_1M | SZ_64K | SZ_4K,
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 3afdf43f732a..6e134c7c227f 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -1,1295 +1,732 @@
 /*
- * IOMMU API for SMMU in Tegra30
+ * Copyright (C) 2011-2014 NVIDIA CORPORATION.  All rights reserved.
 *
- * Copyright (c) 2011-2013, NVIDIA CORPORATION.  All rights reserved.
+ * This program is free software; you can redistribute it and/or modify
- *
+ * it under the terms of the GNU General Public License version 2 as
- * This program is free software; you can redistribute it and/or modify it
+ * published by the Free Software Foundation.
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 */
-#define pr_fmt(fmt)     "%s(): " fmt, __func__
 #include <linux/err.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/device.h>
-#include <linux/sched.h>
 #include <linux/iommu.h>
-#include <linux/io.h>
+#include <linux/kernel.h>
 #include <linux/of.h>
-#include <linux/of_iommu.h>
+#include <linux/of_device.h>
-#include <linux/debugfs.h>
+#include <linux/platform_device.h>
-#include <linux/seq_file.h>
+#include <linux/slab.h>
 #include <soc/tegra/ahb.h>
+#include <soc/tegra/mc.h>
-#include <asm/page.h>
+struct tegra_smmu {
-#include <asm/cacheflush.h>
+        void __iomem *regs;
+        struct device *dev;
-enum smmu_hwgrp {
-        HWGRP_AFI,
-        HWGRP_AVPC,
-        HWGRP_DC,
-        HWGRP_DCB,
-        HWGRP_EPP,
-        HWGRP_G2,
-        HWGRP_HC,
-        HWGRP_HDA,
-        HWGRP_ISP,
-        HWGRP_MPE,
-        HWGRP_NV,
-        HWGRP_NV2,
-        HWGRP_PPCS,
-        HWGRP_SATA,
-        HWGRP_VDE,
-        HWGRP_VI,
-        HWGRP_COUNT,
-        HWGRP_END = ~0,
-};
-#define HWG_AFI         (1 << HWGRP_AFI)
+        struct tegra_mc *mc;
-#define HWG_AVPC        (1 << HWGRP_AVPC)
+        const struct tegra_smmu_soc *soc;
-#define HWG_DC          (1 << HWGRP_DC)
-#define HWG_DCB         (1 << HWGRP_DCB)
-#define HWG_EPP         (1 << HWGRP_EPP)
-#define HWG_G2          (1 << HWGRP_G2)
-#define HWG_HC          (1 << HWGRP_HC)
-#define HWG_HDA         (1 << HWGRP_HDA)
-#define HWG_ISP         (1 << HWGRP_ISP)
-#define HWG_MPE         (1 << HWGRP_MPE)
-#define HWG_NV          (1 << HWGRP_NV)
-#define HWG_NV2         (1 << HWGRP_NV2)
-#define HWG_PPCS        (1 << HWGRP_PPCS)
-#define HWG_SATA        (1 << HWGRP_SATA)
-#define HWG_VDE         (1 << HWGRP_VDE)
-#define HWG_VI          (1 << HWGRP_VI)
-/* bitmap of the page sizes currently supported */
-#define SMMU_IOMMU_PGSIZES      (SZ_4K)
-#define SMMU_CONFIG                             0x10
-#define SMMU_CONFIG_DISABLE                     0
-#define SMMU_CONFIG_ENABLE                      1
-/* REVISIT: To support multiple MCs */
-enum {
-        _MC = 0,
-};
-enum {
+        unsigned long *asids;
-        _TLB = 0,
+        struct mutex lock;
-        _PTC,
-};
-#define SMMU_CACHE_CONFIG_BASE                  0x14
+        struct list_head list;
-#define __SMMU_CACHE_CONFIG(mc, cache)          (SMMU_CACHE_CONFIG_BASE + 4 * cache)
-#define SMMU_CACHE_CONFIG(cache)                __SMMU_CACHE_CONFIG(_MC, cache)
-#define SMMU_CACHE_CONFIG_STATS_SHIFT           31
-#define SMMU_CACHE_CONFIG_STATS_ENABLE          (1 << SMMU_CACHE_CONFIG_STATS_SHIFT)
-#define SMMU_CACHE_CONFIG_STATS_TEST_SHIFT      30
-#define SMMU_CACHE_CONFIG_STATS_TEST            (1 << SMMU_CACHE_CONFIG_STATS_TEST_SHIFT)
-#define SMMU_TLB_CONFIG_HIT_UNDER_MISS__ENABLE  (1 << 29)
-#define SMMU_TLB_CONFIG_ACTIVE_LINES__VALUE     0x10
-#define SMMU_TLB_CONFIG_RESET_VAL               0x20000010
-#define SMMU_PTC_CONFIG_CACHE__ENABLE           (1 << 29)
-#define SMMU_PTC_CONFIG_INDEX_MAP__PATTERN      0x3f
-#define SMMU_PTC_CONFIG_RESET_VAL               0x2000003f
-#define SMMU_PTB_ASID                           0x1c
-#define SMMU_PTB_ASID_CURRENT_SHIFT             0
-#define SMMU_PTB_DATA                           0x20
-#define SMMU_PTB_DATA_RESET_VAL                 0
-#define SMMU_PTB_DATA_ASID_NONSECURE_SHIFT      29
-#define SMMU_PTB_DATA_ASID_WRITABLE_SHIFT       30
-#define SMMU_PTB_DATA_ASID_READABLE_SHIFT       31
-#define SMMU_TLB_FLUSH                          0x30
-#define SMMU_TLB_FLUSH_VA_MATCH_ALL             0
-#define SMMU_TLB_FLUSH_VA_MATCH_SECTION         2
-#define SMMU_TLB_FLUSH_VA_MATCH_GROUP           3
-#define SMMU_TLB_FLUSH_ASID_SHIFT               29
-#define SMMU_TLB_FLUSH_ASID_MATCH_DISABLE       0
-#define SMMU_TLB_FLUSH_ASID_MATCH_ENABLE        1
-#define SMMU_TLB_FLUSH_ASID_MATCH_SHIFT         31
-#define SMMU_PTC_FLUSH                          0x34
-#define SMMU_PTC_FLUSH_TYPE_ALL                 0
-#define SMMU_PTC_FLUSH_TYPE_ADR                 1
-#define SMMU_PTC_FLUSH_ADR_SHIFT                4
-#define SMMU_ASID_SECURITY                      0x38
-#define SMMU_STATS_CACHE_COUNT_BASE             0x1f0
-#define SMMU_STATS_CACHE_COUNT(mc, cache, hitmiss)              \
-        (SMMU_STATS_CACHE_COUNT_BASE + 8 * cache + 4 * hitmiss)
-#define SMMU_TRANSLATION_ENABLE_0               0x228
-#define SMMU_TRANSLATION_ENABLE_1               0x22c
-#define SMMU_TRANSLATION_ENABLE_2               0x230
-#define SMMU_AFI_ASID   0x238   /* PCIE */
-#define SMMU_AVPC_ASID  0x23c   /* AVP */
-#define SMMU_DC_ASID    0x240   /* Display controller */
-#define SMMU_DCB_ASID   0x244   /* Display controller B */
-#define SMMU_EPP_ASID   0x248   /* Encoder pre-processor */
-#define SMMU_G2_ASID    0x24c   /* 2D engine */
-#define SMMU_HC_ASID    0x250   /* Host1x */
-#define SMMU_HDA_ASID   0x254   /* High-def audio */
-#define SMMU_ISP_ASID   0x258   /* Image signal processor */
-#define SMMU_MPE_ASID   0x264   /* MPEG encoder */
-#define SMMU_NV_ASID    0x268   /* (3D) */
-#define SMMU_NV2_ASID   0x26c   /* (3D) */
-#define SMMU_PPCS_ASID  0x270   /* AHB */
-#define SMMU_SATA_ASID  0x278   /* SATA */
-#define SMMU_VDE_ASID   0x27c   /* Video decoder */
-#define SMMU_VI_ASID    0x280   /* Video input */
-#define SMMU_PDE_NEXT_SHIFT             28
-#define SMMU_TLB_FLUSH_VA_SECTION__MASK         0xffc00000
-#define SMMU_TLB_FLUSH_VA_SECTION__SHIFT        12 /* right shift */
-#define SMMU_TLB_FLUSH_VA_GROUP__MASK           0xffffc000
-#define SMMU_TLB_FLUSH_VA_GROUP__SHIFT          12 /* right shift */
-#define SMMU_TLB_FLUSH_VA(iova, which)  \
-        ((((iova) & SMMU_TLB_FLUSH_VA_##which##__MASK) >> \
-                SMMU_TLB_FLUSH_VA_##which##__SHIFT) |   \
-        SMMU_TLB_FLUSH_VA_MATCH_##which)
-#define SMMU_PTB_ASID_CUR(n)    \
-                ((n) << SMMU_PTB_ASID_CURRENT_SHIFT)
-#define SMMU_TLB_FLUSH_ASID_MATCH_disable               \
-                (SMMU_TLB_FLUSH_ASID_MATCH_DISABLE <<   \
-                        SMMU_TLB_FLUSH_ASID_MATCH_SHIFT)
-#define SMMU_TLB_FLUSH_ASID_MATCH__ENABLE               \
-                (SMMU_TLB_FLUSH_ASID_MATCH_ENABLE <<    \
-                        SMMU_TLB_FLUSH_ASID_MATCH_SHIFT)
-#define SMMU_PAGE_SHIFT 12
-#define SMMU_PAGE_SIZE  (1 << SMMU_PAGE_SHIFT)
-#define SMMU_PAGE_MASK  ((1 << SMMU_PAGE_SHIFT) - 1)
-#define SMMU_PDIR_COUNT 1024
-#define SMMU_PDIR_SIZE  (sizeof(unsigned long) * SMMU_PDIR_COUNT)
-#define SMMU_PTBL_COUNT 1024
-#define SMMU_PTBL_SIZE  (sizeof(unsigned long) * SMMU_PTBL_COUNT)
-#define SMMU_PDIR_SHIFT 12
-#define SMMU_PDE_SHIFT  12
-#define SMMU_PTE_SHIFT  12
-#define SMMU_PFN_MASK   0x000fffff
-#define SMMU_ADDR_TO_PFN(addr)  ((addr) >> 12)
-#define SMMU_ADDR_TO_PDN(addr)  ((addr) >> 22)
-#define SMMU_PDN_TO_ADDR(pdn)   ((pdn) << 22)
-#define _READABLE       (1 << SMMU_PTB_DATA_ASID_READABLE_SHIFT)
-#define _WRITABLE       (1 << SMMU_PTB_DATA_ASID_WRITABLE_SHIFT)
-#define _NONSECURE      (1 << SMMU_PTB_DATA_ASID_NONSECURE_SHIFT)
-#define _PDE_NEXT       (1 << SMMU_PDE_NEXT_SHIFT)
-#define _MASK_ATTR      (_READABLE | _WRITABLE | _NONSECURE)
-#define _PDIR_ATTR      (_READABLE | _WRITABLE | _NONSECURE)
-#define _PDE_ATTR       (_READABLE | _WRITABLE | _NONSECURE)
-#define _PDE_ATTR_N     (_PDE_ATTR | _PDE_NEXT)
-#define _PDE_VACANT(pdn)        (((pdn) << 10) | _PDE_ATTR)
-#define _PTE_ATTR       (_READABLE | _WRITABLE | _NONSECURE)
-#define _PTE_VACANT(addr)       (((addr) >> SMMU_PAGE_SHIFT) | _PTE_ATTR)
-#define SMMU_MK_PDIR(page, attr)        \
-                ((page_to_phys(page) >> SMMU_PDIR_SHIFT) | (attr))
-#define SMMU_MK_PDE(page, attr)         \
-                (unsigned long)((page_to_phys(page) >> SMMU_PDE_SHIFT) | (attr))
-#define SMMU_EX_PTBL_PAGE(pde)          \
-                pfn_to_page((unsigned long)(pde) & SMMU_PFN_MASK)
-#define SMMU_PFN_TO_PTE(pfn, attr)      (unsigned long)((pfn) | (attr))
-#define SMMU_ASID_ENABLE(asid)  ((asid) | (1 << 31))
-#define SMMU_ASID_DISABLE       0
-#define SMMU_ASID_ASID(n)       ((n) & ~SMMU_ASID_ENABLE(0))
-#define NUM_SMMU_REG_BANKS      3
-#define smmu_client_enable_hwgrp(c, m)  smmu_client_set_hwgrp(c, m, 1)
-#define smmu_client_disable_hwgrp(c)    smmu_client_set_hwgrp(c, 0, 0)
-#define __smmu_client_enable_hwgrp(c, m) __smmu_client_set_hwgrp(c, m, 1)
-#define __smmu_client_disable_hwgrp(c)  __smmu_client_set_hwgrp(c, 0, 0)
-#define HWGRP_INIT(client) [HWGRP_##client] = SMMU_##client##_ASID
-static const u32 smmu_hwgrp_asid_reg[] = {
-        HWGRP_INIT(AFI),
-        HWGRP_INIT(AVPC),
-        HWGRP_INIT(DC),
-        HWGRP_INIT(DCB),
-        HWGRP_INIT(EPP),
-        HWGRP_INIT(G2),
-        HWGRP_INIT(HC),
-        HWGRP_INIT(HDA),
-        HWGRP_INIT(ISP),
-        HWGRP_INIT(MPE),
-        HWGRP_INIT(NV),
-        HWGRP_INIT(NV2),
-        HWGRP_INIT(PPCS),
-        HWGRP_INIT(SATA),
-        HWGRP_INIT(VDE),
-        HWGRP_INIT(VI),
 };
-#define HWGRP_ASID_REG(x) (smmu_hwgrp_asid_reg[x])
-/*
+struct tegra_smmu_as {
- * Per client for address space
+        struct iommu_domain *domain;
- */
+        struct tegra_smmu *smmu;
-struct smmu_client {
+        unsigned int use_count;
-        struct device           *dev;
+        struct page *count;
-        struct list_head        list;
+        struct page *pd;
-        struct smmu_as          *as;
+        unsigned id;
-        u32                     hwgrp;
+        u32 attr;
 };
-/*
+static inline void smmu_writel(struct tegra_smmu *smmu, u32 value,
- * Per address space
+                               unsigned long offset)
- */
+{
-struct smmu_as {
+        writel(value, smmu->regs + offset);
-        struct smmu_device      *smmu;  /* back pointer to container */
+}
-        unsigned int            asid;
-        spinlock_t              lock;   /* for pagetable */
-        struct page             *pdir_page;
-        unsigned long           pdir_attr;
-        unsigned long           pde_attr;
-        unsigned long           pte_attr;
-        unsigned int            *pte_count;
-        struct list_head        client;
-        spinlock_t              client_lock; /* for client list */
-};
-struct smmu_debugfs_info {
+static inline u32 smmu_readl(struct tegra_smmu *smmu, unsigned long offset)
-        struct smmu_device *smmu;
+{
-        int mc;
+        return readl(smmu->regs + offset);
-        int cache;
+}
-};
-/*
+#define SMMU_CONFIG 0x010
- * Per SMMU device - IOMMU device
+#define  SMMU_CONFIG_ENABLE (1 << 0)
- */
-struct smmu_device {
-        void __iomem    *regbase;       /* register offset base */
-        void __iomem    **regs;         /* register block start address array */
-        void __iomem    **rege;         /* register block end address array */
-        int             nregs;          /* number of register blocks */
-        unsigned long   iovmm_base;     /* remappable base address */
-        unsigned long   page_count;     /* total remappable size */
-        spinlock_t      lock;
-        char            *name;
-        struct device   *dev;
-        struct page *avp_vector_page;   /* dummy page shared by all AS's */
-        /*
+#define SMMU_TLB_CONFIG 0x14
-         * Register image savers for suspend/resume
+#define  SMMU_TLB_CONFIG_HIT_UNDER_MISS (1 << 29)
-         */
+#define  SMMU_TLB_CONFIG_ROUND_ROBIN_ARBITRATION (1 << 28)
-        unsigned long translation_enable_0;
+#define  SMMU_TLB_CONFIG_ACTIVE_LINES(x) ((x) & 0x3f)
-        unsigned long translation_enable_1;
-        unsigned long translation_enable_2;
-        unsigned long asid_security;
-        struct dentry *debugfs_root;
+#define SMMU_PTC_CONFIG 0x18
-        struct smmu_debugfs_info *debugfs_info;
+#define  SMMU_PTC_CONFIG_ENABLE (1 << 29)
+#define  SMMU_PTC_CONFIG_REQ_LIMIT(x) (((x) & 0x0f) << 24)
+#define  SMMU_PTC_CONFIG_INDEX_MAP(x) ((x) & 0x3f)
-        struct device_node *ahb;
+#define SMMU_PTB_ASID 0x01c
+#define  SMMU_PTB_ASID_VALUE(x) ((x) & 0x7f)
-        int             num_as;
+#define SMMU_PTB_DATA 0x020
-        struct smmu_as  as[0];          /* Run-time allocated array */
+#define  SMMU_PTB_DATA_VALUE(page, attr) (page_to_phys(page) >> 12 | (attr))
-};
-static struct smmu_device *smmu_handle; /* unique for a system */
+#define SMMU_MK_PDE(page, attr) (page_to_phys(page) >> SMMU_PTE_SHIFT | (attr))
-/*
+#define SMMU_TLB_FLUSH 0x030
- *      SMMU register accessors
+#define  SMMU_TLB_FLUSH_VA_MATCH_ALL     (0 << 0)
- */
+#define  SMMU_TLB_FLUSH_VA_MATCH_SECTION (2 << 0)
-static bool inline smmu_valid_reg(struct smmu_device *smmu,
+#define  SMMU_TLB_FLUSH_VA_MATCH_GROUP   (3 << 0)
-                                  void __iomem *addr)
+#define  SMMU_TLB_FLUSH_ASID(x)          (((x) & 0x7f) << 24)
-{
+#define  SMMU_TLB_FLUSH_VA_SECTION(addr) ((((addr) & 0xffc00000) >> 12) | \
-        int i;
+                                          SMMU_TLB_FLUSH_VA_MATCH_SECTION)
+#define  SMMU_TLB_FLUSH_VA_GROUP(addr)   ((((addr) & 0xffffc000) >> 12) | \
+                                          SMMU_TLB_FLUSH_VA_MATCH_GROUP)
+#define  SMMU_TLB_FLUSH_ASID_MATCH       (1 << 31)
-        for (i = 0; i < smmu->nregs; i++) {
+#define SMMU_PTC_FLUSH 0x034
-                if (addr < smmu->regs[i])
+#define  SMMU_PTC_FLUSH_TYPE_ALL (0 << 0)
-                        break;
+#define  SMMU_PTC_FLUSH_TYPE_ADR (1 << 0)
-                if (addr <= smmu->rege[i])
-                        return true;
-        }
-        return false;
+#define SMMU_PTC_FLUSH_HI 0x9b8
-}
+#define  SMMU_PTC_FLUSH_HI_MASK 0x3
-static inline u32 smmu_read(struct smmu_device *smmu, size_t offs)
+/* per-SWGROUP SMMU_*_ASID register */
-{
+#define SMMU_ASID_ENABLE (1 << 31)
-        void __iomem *addr = smmu->regbase + offs;
+#define SMMU_ASID_MASK 0x7f
+#define SMMU_ASID_VALUE(x) ((x) & SMMU_ASID_MASK)
-        BUG_ON(!smmu_valid_reg(smmu, addr));
+/* page table definitions */
+#define SMMU_NUM_PDE 1024
+#define SMMU_NUM_PTE 1024
-        return readl(addr);
+#define SMMU_SIZE_PD (SMMU_NUM_PDE * 4)
-}
+#define SMMU_SIZE_PT (SMMU_NUM_PTE * 4)
-static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs)
+#define SMMU_PDE_SHIFT 22
-{
+#define SMMU_PTE_SHIFT 12
-        void __iomem *addr = smmu->regbase + offs;
-        BUG_ON(!smmu_valid_reg(smmu, addr));
+#define SMMU_PFN_MASK 0x000fffff
-        writel(val, addr);
+#define SMMU_PD_READABLE        (1 << 31)
-}
+#define SMMU_PD_WRITABLE        (1 << 30)
+#define SMMU_PD_NONSECURE       (1 << 29)
-#define VA_PAGE_TO_PA(va, page) \
+#define SMMU_PDE_READABLE       (1 << 31)
-        (page_to_phys(page) + ((unsigned long)(va) & ~PAGE_MASK))
+#define SMMU_PDE_WRITABLE       (1 << 30)
+#define SMMU_PDE_NONSECURE      (1 << 29)
+#define SMMU_PDE_NEXT           (1 << 28)
-#define FLUSH_CPU_DCACHE(va, page, size)        \
+#define SMMU_PTE_READABLE       (1 << 31)
-        do {    \
+#define SMMU_PTE_WRITABLE       (1 << 30)
-                unsigned long _pa_ = VA_PAGE_TO_PA(va, page);           \
+#define SMMU_PTE_NONSECURE      (1 << 29)
-                __cpuc_flush_dcache_area((void *)(va), (size_t)(size)); \
-                outer_flush_range(_pa_, _pa_+(size_t)(size));           \
-        } while (0)
-/*
+#define SMMU_PDE_ATTR           (SMMU_PDE_READABLE | SMMU_PDE_WRITABLE | \
- * Any interaction between any block on PPSB and a block on APB or AHB
+                                 SMMU_PDE_NONSECURE)
- * must have these read-back barriers to ensure the APB/AHB bus
+#define SMMU_PTE_ATTR           (SMMU_PTE_READABLE | SMMU_PTE_WRITABLE | \
- * transaction is complete before initiating activity on the PPSB
+                                 SMMU_PTE_NONSECURE)
- * block.
- */
-#define FLUSH_SMMU_REGS(smmu)   smmu_read(smmu, SMMU_CONFIG)
-#define smmu_client_hwgrp(c) (u32)((c)->dev->platform_data)
+static inline void smmu_flush_ptc(struct tegra_smmu *smmu, struct page *page,
+                                  unsigned long offset)
-static int __smmu_client_set_hwgrp(struct smmu_client *c,
-                                   unsigned long map, int on)
 {
-        int i;
+        phys_addr_t phys = page ? page_to_phys(page) : 0;
-        struct smmu_as *as = c->as;
+        u32 value;
-        u32 val, offs, mask = SMMU_ASID_ENABLE(as->asid);
-        struct smmu_device *smmu = as->smmu;
+        if (page) {
+                offset &= ~(smmu->mc->soc->atom_size - 1);
-        WARN_ON(!on && map);
-        if (on && !map)
+                if (smmu->mc->soc->num_address_bits > 32) {
-                return -EINVAL;
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
-        if (!on)
+                        value = (phys >> 32) & SMMU_PTC_FLUSH_HI_MASK;
-                map = smmu_client_hwgrp(c);
+#else
+                        value = 0;
-        for_each_set_bit(i, &map, HWGRP_COUNT) {
+#endif
-                offs = HWGRP_ASID_REG(i);
+                        smmu_writel(smmu, value, SMMU_PTC_FLUSH_HI);
-                val = smmu_read(smmu, offs);
-                if (on) {
-                        if (WARN_ON(val & mask))
-                                goto err_hw_busy;
-                        val |= mask;
-                } else {
-                        WARN_ON((val & mask) == mask);
-                        val &= ~mask;
                }
-                smmu_write(smmu, val, offs);
-        }
-        FLUSH_SMMU_REGS(smmu);
-        c->hwgrp = map;
-        return 0;
-err_hw_busy:
+                value = (phys + offset) | SMMU_PTC_FLUSH_TYPE_ADR;
-        for_each_set_bit(i, &map, HWGRP_COUNT) {
+        } else {
-                offs = HWGRP_ASID_REG(i);
+                value = SMMU_PTC_FLUSH_TYPE_ALL;
-                val = smmu_read(smmu, offs);
-                val &= ~mask;
-                smmu_write(smmu, val, offs);
        }
-        return -EBUSY;
+        smmu_writel(smmu, value, SMMU_PTC_FLUSH);
 }
-static int smmu_client_set_hwgrp(struct smmu_client *c, u32 map, int on)
+static inline void smmu_flush_tlb(struct tegra_smmu *smmu)
 {
-        u32 val;
+        smmu_writel(smmu, SMMU_TLB_FLUSH_VA_MATCH_ALL, SMMU_TLB_FLUSH);
-        unsigned long flags;
-        struct smmu_as *as = c->as;
-        struct smmu_device *smmu = as->smmu;
-        spin_lock_irqsave(&smmu->lock, flags);
-        val = __smmu_client_set_hwgrp(c, map, on);
-        spin_unlock_irqrestore(&smmu->lock, flags);
-        return val;
 }
-/*
+static inline void smmu_flush_tlb_asid(struct tegra_smmu *smmu,
- * Flush all TLB entries and all PTC entries
+                                       unsigned long asid)
- * Caller must lock smmu
- */
-static void smmu_flush_regs(struct smmu_device *smmu, int enable)
 {
-        u32 val;
+        u32 value;
-        smmu_write(smmu, SMMU_PTC_FLUSH_TYPE_ALL, SMMU_PTC_FLUSH);
-        FLUSH_SMMU_REGS(smmu);
-        val = SMMU_TLB_FLUSH_VA_MATCH_ALL |
-                SMMU_TLB_FLUSH_ASID_MATCH_disable;
-        smmu_write(smmu, val, SMMU_TLB_FLUSH);
-        if (enable)
+        value = SMMU_TLB_FLUSH_ASID_MATCH | SMMU_TLB_FLUSH_ASID(asid) |
-                smmu_write(smmu, SMMU_CONFIG_ENABLE, SMMU_CONFIG);
+                SMMU_TLB_FLUSH_VA_MATCH_ALL;
-        FLUSH_SMMU_REGS(smmu);
+        smmu_writel(smmu, value, SMMU_TLB_FLUSH);
 }
-static int smmu_setup_regs(struct smmu_device *smmu)
+static inline void smmu_flush_tlb_section(struct tegra_smmu *smmu,
+                                          unsigned long asid,
+                                          unsigned long iova)
 {
-        int i;
+        u32 value;
-        u32 val;
-        for (i = 0; i < smmu->num_as; i++) {
+        value = SMMU_TLB_FLUSH_ASID_MATCH | SMMU_TLB_FLUSH_ASID(asid) |
-                struct smmu_as *as = &smmu->as[i];
+                SMMU_TLB_FLUSH_VA_SECTION(iova);
-                struct smmu_client *c;
+        smmu_writel(smmu, value, SMMU_TLB_FLUSH);
-                smmu_write(smmu, SMMU_PTB_ASID_CUR(as->asid), SMMU_PTB_ASID);
-                val = as->pdir_page ?
-                        SMMU_MK_PDIR(as->pdir_page, as->pdir_attr) :
-                        SMMU_PTB_DATA_RESET_VAL;
-                smmu_write(smmu, val, SMMU_PTB_DATA);
-                list_for_each_entry(c, &as->client, list)
-                        __smmu_client_set_hwgrp(c, c->hwgrp, 1);
-        }
-        smmu_write(smmu, smmu->translation_enable_0, SMMU_TRANSLATION_ENABLE_0);
-        smmu_write(smmu, smmu->translation_enable_1, SMMU_TRANSLATION_ENABLE_1);
-        smmu_write(smmu, smmu->translation_enable_2, SMMU_TRANSLATION_ENABLE_2);
-        smmu_write(smmu, smmu->asid_security, SMMU_ASID_SECURITY);
-        smmu_write(smmu, SMMU_TLB_CONFIG_RESET_VAL, SMMU_CACHE_CONFIG(_TLB));
-        smmu_write(smmu, SMMU_PTC_CONFIG_RESET_VAL, SMMU_CACHE_CONFIG(_PTC));
-        smmu_flush_regs(smmu, 1);
-        return tegra_ahb_enable_smmu(smmu->ahb);
 }
-static void flush_ptc_and_tlb(struct smmu_device *smmu,
+static inline void smmu_flush_tlb_group(struct tegra_smmu *smmu,
-                      struct smmu_as *as, dma_addr_t iova,
+                                        unsigned long asid,
-                      unsigned long *pte, struct page *page, int is_pde)
+                                        unsigned long iova)
 {
-        u32 val;
+        u32 value;
-        unsigned long tlb_flush_va = is_pde
-                ?  SMMU_TLB_FLUSH_VA(iova, SECTION)
-                :  SMMU_TLB_FLUSH_VA(iova, GROUP);
-        val = SMMU_PTC_FLUSH_TYPE_ADR | VA_PAGE_TO_PA(pte, page);
-        smmu_write(smmu, val, SMMU_PTC_FLUSH);
-        FLUSH_SMMU_REGS(smmu);
-        val = tlb_flush_va |
-                SMMU_TLB_FLUSH_ASID_MATCH__ENABLE |
-                (as->asid << SMMU_TLB_FLUSH_ASID_SHIFT);
-        smmu_write(smmu, val, SMMU_TLB_FLUSH);
-        FLUSH_SMMU_REGS(smmu);
-}
-static void free_ptbl(struct smmu_as *as, dma_addr_t iova)
+        value = SMMU_TLB_FLUSH_ASID_MATCH | SMMU_TLB_FLUSH_ASID(asid) |
-{
+                SMMU_TLB_FLUSH_VA_GROUP(iova);
-        unsigned long pdn = SMMU_ADDR_TO_PDN(iova);
+        smmu_writel(smmu, value, SMMU_TLB_FLUSH);
-        unsigned long *pdir = (unsigned long *)page_address(as->pdir_page);
-        if (pdir[pdn] != _PDE_VACANT(pdn)) {
-                dev_dbg(as->smmu->dev, "pdn: %lx\n", pdn);
-                ClearPageReserved(SMMU_EX_PTBL_PAGE(pdir[pdn]));
-                __free_page(SMMU_EX_PTBL_PAGE(pdir[pdn]));
-                pdir[pdn] = _PDE_VACANT(pdn);
-                FLUSH_CPU_DCACHE(&pdir[pdn], as->pdir_page, sizeof pdir[pdn]);
-                flush_ptc_and_tlb(as->smmu, as, iova, &pdir[pdn],
-                                  as->pdir_page, 1);
-        }
 }
-static void free_pdir(struct smmu_as *as)
+static inline void smmu_flush(struct tegra_smmu *smmu)
 {
-        unsigned addr;
+        smmu_readl(smmu, SMMU_CONFIG);
-        int count;
-        struct device *dev = as->smmu->dev;
-        if (!as->pdir_page)
-                return;
-        addr = as->smmu->iovmm_base;
-        count = as->smmu->page_count;
-        while (count-- > 0) {
-                free_ptbl(as, addr);
-                addr += SMMU_PAGE_SIZE * SMMU_PTBL_COUNT;
-        }
-        ClearPageReserved(as->pdir_page);
-        __free_page(as->pdir_page);
-        as->pdir_page = NULL;
-        devm_kfree(dev, as->pte_count);
-        as->pte_count = NULL;
 }
-/*
+static int tegra_smmu_alloc_asid(struct tegra_smmu *smmu, unsigned int *idp)
- * Maps PTBL for given iova and returns the PTE address
- * Caller must unmap the mapped PTBL returned in *ptbl_page_p
- */
-static unsigned long *locate_pte(struct smmu_as *as,
-                                 dma_addr_t iova, bool allocate,
-                                 struct page **ptbl_page_p,
-                                 unsigned int **count)
 {
-        unsigned long ptn = SMMU_ADDR_TO_PFN(iova);
+        unsigned long id;
-        unsigned long pdn = SMMU_ADDR_TO_PDN(iova);
-        unsigned long *pdir = page_address(as->pdir_page);
-        unsigned long *ptbl;
-        if (pdir[pdn] != _PDE_VACANT(pdn)) {
-                /* Mapped entry table already exists */
-                *ptbl_page_p = SMMU_EX_PTBL_PAGE(pdir[pdn]);
-                ptbl = page_address(*ptbl_page_p);
-        } else if (!allocate) {
-                return NULL;
-        } else {
-                int pn;
-                unsigned long addr = SMMU_PDN_TO_ADDR(pdn);
-                /* Vacant - allocate a new page table */
+        mutex_lock(&smmu->lock);
-                dev_dbg(as->smmu->dev, "New PTBL pdn: %lx\n", pdn);
-                *ptbl_page_p = alloc_page(GFP_ATOMIC);
+        id = find_first_zero_bit(smmu->asids, smmu->soc->num_asids);
-                if (!*ptbl_page_p) {
+        if (id >= smmu->soc->num_asids) {
-                        dev_err(as->smmu->dev,
+                mutex_unlock(&smmu->lock);
-                                "failed to allocate smmu_device page table\n");
+                return -ENOSPC;
-                        return NULL;
-                }
-                SetPageReserved(*ptbl_page_p);
-                ptbl = (unsigned long *)page_address(*ptbl_page_p);
-                for (pn = 0; pn < SMMU_PTBL_COUNT;
-                     pn++, addr += SMMU_PAGE_SIZE) {
-                        ptbl[pn] = _PTE_VACANT(addr);
-                }
-                FLUSH_CPU_DCACHE(ptbl, *ptbl_page_p, SMMU_PTBL_SIZE);
-                pdir[pdn] = SMMU_MK_PDE(*ptbl_page_p,
-                                        as->pde_attr | _PDE_NEXT);
-                FLUSH_CPU_DCACHE(&pdir[pdn], as->pdir_page, sizeof pdir[pdn]);
-                flush_ptc_and_tlb(as->smmu, as, iova, &pdir[pdn],
-                                  as->pdir_page, 1);
        }
-        *count = &as->pte_count[pdn];
-        return &ptbl[ptn % SMMU_PTBL_COUNT];
+        set_bit(id, smmu->asids);
+        *idp = id;
+        mutex_unlock(&smmu->lock);
+        return 0;
 }
-#ifdef CONFIG_SMMU_SIG_DEBUG
+static void tegra_smmu_free_asid(struct tegra_smmu *smmu, unsigned int id)
-static void put_signature(struct smmu_as *as,
-                          dma_addr_t iova, unsigned long pfn)
 {
-        struct page *page;
+        mutex_lock(&smmu->lock);
-        unsigned long *vaddr;
+        clear_bit(id, smmu->asids);
+        mutex_unlock(&smmu->lock);
-        page = pfn_to_page(pfn);
-        vaddr = page_address(page);
-        if (!vaddr)
-                return;
-        vaddr[0] = iova;
-        vaddr[1] = pfn << PAGE_SHIFT;
-        FLUSH_CPU_DCACHE(vaddr, page, sizeof(vaddr[0]) * 2);
 }
-#else
-static inline void put_signature(struct smmu_as *as,
+static bool tegra_smmu_capable(enum iommu_cap cap)
-                                 unsigned long addr, unsigned long pfn)
 {
+        return false;
 }
-#endif
-/*
+static int tegra_smmu_domain_init(struct iommu_domain *domain)
- * Caller must not hold as->lock
- */
-static int alloc_pdir(struct smmu_as *as)
 {
-        unsigned long *pdir, flags;
+        struct tegra_smmu_as *as;
-        int pdn, err = 0;
+        unsigned int i;
-        u32 val;
+        uint32_t *pd;
-        struct smmu_device *smmu = as->smmu;
-        struct page *page;
-        unsigned int *cnt;
-        /*
+        as = kzalloc(sizeof(*as), GFP_KERNEL);
-         * do the allocation, then grab as->lock
+        if (!as)
-         */
+                return -ENOMEM;
-        cnt = devm_kzalloc(smmu->dev,
-                           sizeof(cnt[0]) * SMMU_PDIR_COUNT,
-                           GFP_KERNEL);
-        page = alloc_page(GFP_KERNEL | __GFP_DMA);
-        spin_lock_irqsave(&as->lock, flags);
+        as->attr = SMMU_PD_READABLE | SMMU_PD_WRITABLE | SMMU_PD_NONSECURE;
+        as->domain = domain;
-        if (as->pdir_page) {
+        as->pd = alloc_page(GFP_KERNEL | __GFP_DMA);
-                /* We raced, free the redundant */
+        if (!as->pd) {
-                err = -EAGAIN;
+                kfree(as);
-                goto err_out;
+                return -ENOMEM;
        }
-        if (!page || !cnt) {
+        as->count = alloc_page(GFP_KERNEL);
-                dev_err(smmu->dev, "failed to allocate at %s\n", __func__);
+        if (!as->count) {
-                err = -ENOMEM;
+                __free_page(as->pd);
-                goto err_out;
+                kfree(as);
+                return -ENOMEM;
        }
-        as->pdir_page = page;
+        /* clear PDEs */
-        as->pte_count = cnt;
+        pd = page_address(as->pd);
+        SetPageReserved(as->pd);
-        SetPageReserved(as->pdir_page);
+        for (i = 0; i < SMMU_NUM_PDE; i++)
-        pdir = page_address(as->pdir_page);
+                pd[i] = 0;
-        for (pdn = 0; pdn < SMMU_PDIR_COUNT; pdn++)
+        /* clear PDE usage counters */
-                pdir[pdn] = _PDE_VACANT(pdn);
+        pd = page_address(as->count);
-        FLUSH_CPU_DCACHE(pdir, as->pdir_page, SMMU_PDIR_SIZE);
+        SetPageReserved(as->count);
-        val = SMMU_PTC_FLUSH_TYPE_ADR | VA_PAGE_TO_PA(pdir, as->pdir_page);
-        smmu_write(smmu, val, SMMU_PTC_FLUSH);
-        FLUSH_SMMU_REGS(as->smmu);
-        val = SMMU_TLB_FLUSH_VA_MATCH_ALL |
-                SMMU_TLB_FLUSH_ASID_MATCH__ENABLE |
-                (as->asid << SMMU_TLB_FLUSH_ASID_SHIFT);
-        smmu_write(smmu, val, SMMU_TLB_FLUSH);
-        FLUSH_SMMU_REGS(as->smmu);
-        spin_unlock_irqrestore(&as->lock, flags);
+        for (i = 0; i < SMMU_NUM_PDE; i++)
+                pd[i] = 0;
-        return 0;
-err_out:
+        domain->priv = as;
-        spin_unlock_irqrestore(&as->lock, flags);
-        devm_kfree(smmu->dev, cnt);
+        return 0;
-        if (page)
-                __free_page(page);
-        return err;
 }
-static void __smmu_iommu_unmap(struct smmu_as *as, dma_addr_t iova)
+static void tegra_smmu_domain_destroy(struct iommu_domain *domain)
 {
-        unsigned long *pte;
+        struct tegra_smmu_as *as = domain->priv;
-        struct page *page;
-        unsigned int *count;
-        pte = locate_pte(as, iova, false, &page, &count);
+        /* TODO: free page directory and page tables */
-        if (WARN_ON(!pte))
+        ClearPageReserved(as->pd);
-                return;
-        if (WARN_ON(*pte == _PTE_VACANT(iova)))
+        kfree(as);
-                return;
-        *pte = _PTE_VACANT(iova);
-        FLUSH_CPU_DCACHE(pte, page, sizeof(*pte));
-        flush_ptc_and_tlb(as->smmu, as, iova, pte, page, 0);
-        if (!--(*count))
-                free_ptbl(as, iova);
 }
-static void __smmu_iommu_map_pfn(struct smmu_as *as, dma_addr_t iova,
+static const struct tegra_smmu_swgroup *
-                                 unsigned long pfn)
+tegra_smmu_find_swgroup(struct tegra_smmu *smmu, unsigned int swgroup)
 {
-        struct smmu_device *smmu = as->smmu;
+        const struct tegra_smmu_swgroup *group = NULL;
-        unsigned long *pte;
+        unsigned int i;
-        unsigned int *count;
-        struct page *page;
-        pte = locate_pte(as, iova, true, &page, &count);
+        for (i = 0; i < smmu->soc->num_swgroups; i++) {
-        if (WARN_ON(!pte))
+                if (smmu->soc->swgroups[i].swgroup == swgroup) {
-                return;
+                        group = &smmu->soc->swgroups[i];
+                        break;
+                }
+        }
-        if (*pte == _PTE_VACANT(iova))
+        return group;
-                (*count)++;
-        *pte = SMMU_PFN_TO_PTE(pfn, as->pte_attr);
-        if (unlikely((*pte == _PTE_VACANT(iova))))
-                (*count)--;
-        FLUSH_CPU_DCACHE(pte, page, sizeof(*pte));
-        flush_ptc_and_tlb(smmu, as, iova, pte, page, 0);
-        put_signature(as, iova, pfn);
 }
-static int smmu_iommu_map(struct iommu_domain *domain, unsigned long iova,
+static void tegra_smmu_enable(struct tegra_smmu *smmu, unsigned int swgroup,
-                          phys_addr_t pa, size_t bytes, int prot)
+                              unsigned int asid)
 {
-        struct smmu_as *as = domain->priv;
+        const struct tegra_smmu_swgroup *group;
-        unsigned long pfn = __phys_to_pfn(pa);
+        unsigned int i;
-        unsigned long flags;
+        u32 value;
-        dev_dbg(as->smmu->dev, "[%d] %08lx:%pa\n", as->asid, iova, &pa);
+        for (i = 0; i < smmu->soc->num_clients; i++) {
+                const struct tegra_mc_client *client = &smmu->soc->clients[i];
-        if (!pfn_valid(pfn))
+                if (client->swgroup != swgroup)
-                return -ENOMEM;
+                        continue;
-        spin_lock_irqsave(&as->lock, flags);
-        __smmu_iommu_map_pfn(as, iova, pfn);
-        spin_unlock_irqrestore(&as->lock, flags);
-        return 0;
-}
-static size_t smmu_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
-                               size_t bytes)
-{
-        struct smmu_as *as = domain->priv;
-        unsigned long flags;
-        dev_dbg(as->smmu->dev, "[%d] %08lx\n", as->asid, iova);
+                value = smmu_readl(smmu, client->smmu.reg);
+                value |= BIT(client->smmu.bit);
+                smmu_writel(smmu, value, client->smmu.reg);
+        }
-        spin_lock_irqsave(&as->lock, flags);
+        group = tegra_smmu_find_swgroup(smmu, swgroup);
-        __smmu_iommu_unmap(as, iova);
+        if (group) {
-        spin_unlock_irqrestore(&as->lock, flags);
+                value = smmu_readl(smmu, group->reg);
-        return SMMU_PAGE_SIZE;
+                value &= ~SMMU_ASID_MASK;
+                value |= SMMU_ASID_VALUE(asid);
+                value |= SMMU_ASID_ENABLE;
+                smmu_writel(smmu, value, group->reg);
+        }
 }
-static phys_addr_t smmu_iommu_iova_to_phys(struct iommu_domain *domain,
+static void tegra_smmu_disable(struct tegra_smmu *smmu, unsigned int swgroup,
-                                           dma_addr_t iova)
+                               unsigned int asid)
 {
-        struct smmu_as *as = domain->priv;
+        const struct tegra_smmu_swgroup *group;
-        unsigned long *pte;
+        unsigned int i;
-        unsigned int *count;
+        u32 value;
-        struct page *page;
-        unsigned long pfn;
-        unsigned long flags;
-        spin_lock_irqsave(&as->lock, flags);
+        group = tegra_smmu_find_swgroup(smmu, swgroup);
+        if (group) {
+                value = smmu_readl(smmu, group->reg);
+                value &= ~SMMU_ASID_MASK;
+                value |= SMMU_ASID_VALUE(asid);
+                value &= ~SMMU_ASID_ENABLE;
+                smmu_writel(smmu, value, group->reg);
+        }
-        pte = locate_pte(as, iova, true, &page, &count);
+        for (i = 0; i < smmu->soc->num_clients; i++) {
-        pfn = *pte & SMMU_PFN_MASK;
+                const struct tegra_mc_client *client = &smmu->soc->clients[i];
-        WARN_ON(!pfn_valid(pfn));
-        dev_dbg(as->smmu->dev,
-                "iova:%08llx pfn:%08lx asid:%d\n", (unsigned long long)iova,
-                 pfn, as->asid);
-        spin_unlock_irqrestore(&as->lock, flags);
+                if (client->swgroup != swgroup)
-        return PFN_PHYS(pfn);
+                        continue;
-}
-static bool smmu_iommu_capable(enum iommu_cap cap)
+                value = smmu_readl(smmu, client->smmu.reg);
-{
+                value &= ~BIT(client->smmu.bit);
-        return false;
+                smmu_writel(smmu, value, client->smmu.reg);
+        }
 }
-static int smmu_iommu_attach_dev(struct iommu_domain *domain,
+static int tegra_smmu_as_prepare(struct tegra_smmu *smmu,
-                                 struct device *dev)
+                                 struct tegra_smmu_as *as)
 {
-        struct smmu_as *as = domain->priv;
+        u32 value;
-        struct smmu_device *smmu = as->smmu;
-        struct smmu_client *client, *c;
-        u32 map;
        int err;
-        client = devm_kzalloc(smmu->dev, sizeof(*c), GFP_KERNEL);
+        if (as->use_count > 0) {
-        if (!client)
+                as->use_count++;
-                return -ENOMEM;
+                return 0;
-        client->dev = dev;
-        client->as = as;
-        map = (unsigned long)dev->platform_data;
-        if (!map)
-                return -EINVAL;
-        err = smmu_client_enable_hwgrp(client, map);
-        if (err)
-                goto err_hwgrp;
-        spin_lock(&as->client_lock);
-        list_for_each_entry(c, &as->client, list) {
-                if (c->dev == dev) {
-                        dev_err(smmu->dev,
-                                "%s is already attached\n", dev_name(c->dev));
-                        err = -EINVAL;
-                        goto err_client;
-                }
        }
-        list_add(&client->list, &as->client);
-        spin_unlock(&as->client_lock);
-        /*
+        err = tegra_smmu_alloc_asid(smmu, &as->id);
-         * Reserve "page zero" for AVP vectors using a common dummy
+        if (err < 0)
-         * page.
+                return err;
-         */
-        if (map & HWG_AVPC) {
-                struct page *page;
-                page = as->smmu->avp_vector_page;
+        smmu->soc->ops->flush_dcache(as->pd, 0, SMMU_SIZE_PD);
-                __smmu_iommu_map_pfn(as, 0, page_to_pfn(page));
+        smmu_flush_ptc(smmu, as->pd, 0);
+        smmu_flush_tlb_asid(smmu, as->id);
-                pr_info("Reserve \"page zero\" for AVP vectors using a common dummy\n");
+        smmu_writel(smmu, as->id & 0x7f, SMMU_PTB_ASID);
-        }
+        value = SMMU_PTB_DATA_VALUE(as->pd, as->attr);
+        smmu_writel(smmu, value, SMMU_PTB_DATA);
+        smmu_flush(smmu);
-        dev_dbg(smmu->dev, "%s is attached\n", dev_name(dev));
+        as->smmu = smmu;
-        return 0;
+        as->use_count++;
-err_client:
+        return 0;
-        smmu_client_disable_hwgrp(client);
-        spin_unlock(&as->client_lock);
-err_hwgrp:
-        devm_kfree(smmu->dev, client);
-        return err;
 }
-static void smmu_iommu_detach_dev(struct iommu_domain *domain,
+static void tegra_smmu_as_unprepare(struct tegra_smmu *smmu,
-                                  struct device *dev)
+                                    struct tegra_smmu_as *as)
 {
-        struct smmu_as *as = domain->priv;
+        if (--as->use_count > 0)
-        struct smmu_device *smmu = as->smmu;
+                return;
-        struct smmu_client *c;
+        tegra_smmu_free_asid(smmu, as->id);
-        spin_lock(&as->client_lock);
+        as->smmu = NULL;
-        list_for_each_entry(c, &as->client, list) {
-                if (c->dev == dev) {
-                        smmu_client_disable_hwgrp(c);
-                        list_del(&c->list);
-                        devm_kfree(smmu->dev, c);
-                        c->as = NULL;
-                        dev_dbg(smmu->dev,
-                                "%s is detached\n", dev_name(c->dev));
-                        goto out;
-                }
-        }
-        dev_err(smmu->dev, "Couldn't find %s\n", dev_name(dev));
-out:
-        spin_unlock(&as->client_lock);
 }
-static int smmu_iommu_domain_init(struct iommu_domain *domain)
+static int tegra_smmu_attach_dev(struct iommu_domain *domain,
+                                 struct device *dev)
 {
-        int i, err = -EAGAIN;
+        struct tegra_smmu *smmu = dev->archdata.iommu;
-        unsigned long flags;
+        struct tegra_smmu_as *as = domain->priv;
-        struct smmu_as *as;
+        struct device_node *np = dev->of_node;
-        struct smmu_device *smmu = smmu_handle;
+        struct of_phandle_args args;
+        unsigned int index = 0;
+        int err = 0;
-        /* Look for a free AS with lock held */
+        while (!of_parse_phandle_with_args(np, "iommus", "#iommu-cells", index,
-        for  (i = 0; i < smmu->num_as; i++) {
+                                           &args)) {
-                as = &smmu->as[i];
+                unsigned int swgroup = args.args[0];
-                if (as->pdir_page)
+                if (args.np != smmu->dev->of_node) {
+                        of_node_put(args.np);
                        continue;
+                }
-                err = alloc_pdir(as);
+                of_node_put(args.np);
-                if (!err)
-                        goto found;
-                if (err != -EAGAIN)
+                err = tegra_smmu_as_prepare(smmu, as);
-                        break;
+                if (err < 0)
+                        return err;
+                tegra_smmu_enable(smmu, swgroup, as->id);
+                index++;
        }
-        if (i == smmu->num_as)
-                dev_err(smmu->dev,  "no free AS\n");
-        return err;
-found:
+        if (index == 0)
-        spin_lock_irqsave(&smmu->lock, flags);
+                return -ENODEV;
-        /* Update PDIR register */
+        return 0;
-        smmu_write(smmu, SMMU_PTB_ASID_CUR(as->asid), SMMU_PTB_ASID);
+}
-        smmu_write(smmu,
-                   SMMU_MK_PDIR(as->pdir_page, as->pdir_attr), SMMU_PTB_DATA);
-        FLUSH_SMMU_REGS(smmu);
-        spin_unlock_irqrestore(&smmu->lock, flags);
+static void tegra_smmu_detach_dev(struct iommu_domain *domain, struct device *dev)
+{
+        struct tegra_smmu_as *as = domain->priv;
+        struct device_node *np = dev->of_node;
+        struct tegra_smmu *smmu = as->smmu;
+        struct of_phandle_args args;
+        unsigned int index = 0;
-        domain->priv = as;
+        while (!of_parse_phandle_with_args(np, "iommus", "#iommu-cells", index,
+                                           &args)) {
+                unsigned int swgroup = args.args[0];
-        domain->geometry.aperture_start = smmu->iovmm_base;
+                if (args.np != smmu->dev->of_node) {
-        domain->geometry.aperture_end   = smmu->iovmm_base +
+                        of_node_put(args.np);
-                smmu->page_count * SMMU_PAGE_SIZE - 1;
+                        continue;
-        domain->geometry.force_aperture = true;
+                }
-        dev_dbg(smmu->dev, "smmu_as@%p\n", as);
+                of_node_put(args.np);
-        return 0;
+                tegra_smmu_disable(smmu, swgroup, as->id);
+                tegra_smmu_as_unprepare(smmu, as);
+                index++;
+        }
 }
-static void smmu_iommu_domain_destroy(struct iommu_domain *domain)
+static u32 *as_get_pte(struct tegra_smmu_as *as, dma_addr_t iova,
+                       struct page **pagep)
 {
-        struct smmu_as *as = domain->priv;
+        u32 *pd = page_address(as->pd), *pt, *count;
-        struct smmu_device *smmu = as->smmu;
+        u32 pde = (iova >> SMMU_PDE_SHIFT) & 0x3ff;
-        unsigned long flags;
+        u32 pte = (iova >> SMMU_PTE_SHIFT) & 0x3ff;
+        struct tegra_smmu *smmu = as->smmu;
+        struct page *page;
+        unsigned int i;
+        if (pd[pde] == 0) {
+                page = alloc_page(GFP_KERNEL | __GFP_DMA);
+                if (!page)
+                        return NULL;
-        spin_lock_irqsave(&as->lock, flags);
+                pt = page_address(page);
+                SetPageReserved(page);
-        if (as->pdir_page) {
+                for (i = 0; i < SMMU_NUM_PTE; i++)
-                spin_lock(&smmu->lock);
+                        pt[i] = 0;
-                smmu_write(smmu, SMMU_PTB_ASID_CUR(as->asid), SMMU_PTB_ASID);
-                smmu_write(smmu, SMMU_PTB_DATA_RESET_VAL, SMMU_PTB_DATA);
-                FLUSH_SMMU_REGS(smmu);
-                spin_unlock(&smmu->lock);
-                free_pdir(as);
+                smmu->soc->ops->flush_dcache(page, 0, SMMU_SIZE_PT);
-        }
-        if (!list_empty(&as->client)) {
+                pd[pde] = SMMU_MK_PDE(page, SMMU_PDE_ATTR | SMMU_PDE_NEXT);
-                struct smmu_client *c;
-                list_for_each_entry(c, &as->client, list)
+                smmu->soc->ops->flush_dcache(as->pd, pde << 2, 4);
-                        smmu_iommu_detach_dev(domain, c->dev);
+                smmu_flush_ptc(smmu, as->pd, pde << 2);
+                smmu_flush_tlb_section(smmu, as->id, iova);
+                smmu_flush(smmu);
+        } else {
+                page = pfn_to_page(pd[pde] & SMMU_PFN_MASK);
+                pt = page_address(page);
        }
-        spin_unlock_irqrestore(&as->lock, flags);
+        *pagep = page;
-        domain->priv = NULL;
+        /* Keep track of entries in this page table. */
-        dev_dbg(smmu->dev, "smmu_as@%p\n", as);
+        count = page_address(as->count);
-}
+        if (pt[pte] == 0)
+                count[pde]++;
-static const struct iommu_ops smmu_iommu_ops = {
+        return &pt[pte];
-        .capable        = smmu_iommu_capable,
+}
-        .domain_init    = smmu_iommu_domain_init,
-        .domain_destroy = smmu_iommu_domain_destroy,
-        .attach_dev     = smmu_iommu_attach_dev,
-        .detach_dev     = smmu_iommu_detach_dev,
-        .map            = smmu_iommu_map,
-        .unmap          = smmu_iommu_unmap,
-        .iova_to_phys   = smmu_iommu_iova_to_phys,
-        .pgsize_bitmap  = SMMU_IOMMU_PGSIZES,
-};
-/* Should be in the order of enum */
-static const char * const smmu_debugfs_mc[] = { "mc", };
-static const char * const smmu_debugfs_cache[] = {  "tlb", "ptc", };
-static ssize_t smmu_debugfs_stats_write(struct file *file,
+static void as_put_pte(struct tegra_smmu_as *as, dma_addr_t iova)
-                                        const char __user *buffer,
-                                        size_t count, loff_t *pos)
 {
-        struct smmu_debugfs_info *info;
+        u32 pde = (iova >> SMMU_PDE_SHIFT) & 0x3ff;
-        struct smmu_device *smmu;
+        u32 pte = (iova >> SMMU_PTE_SHIFT) & 0x3ff;
-        int i;
+        u32 *count = page_address(as->count);
-        enum {
+        u32 *pd = page_address(as->pd), *pt;
-                _OFF = 0,
+        struct page *page;
-                _ON,
-                _RESET,
-        };
-        const char * const command[] = {
-                [_OFF]          = "off",
-                [_ON]           = "on",
-                [_RESET]        = "reset",
-        };
-        char str[] = "reset";
-        u32 val;
-        size_t offs;
-        count = min_t(size_t, count, sizeof(str));
+        page = pfn_to_page(pd[pde] & SMMU_PFN_MASK);
-        if (copy_from_user(str, buffer, count))
+        pt = page_address(page);
-                return -EINVAL;
-        for (i = 0; i < ARRAY_SIZE(command); i++)
+        /*
-                if (strncmp(str, command[i],
+         * When no entries in this page table are used anymore, return the
-                            strlen(command[i])) == 0)
+         * memory page to the system.
-                        break;
+         */
+        if (pt[pte] != 0) {
+                if (--count[pde] == 0) {
+                        ClearPageReserved(page);
+                        __free_page(page);
+                        pd[pde] = 0;
+                }
-        if (i == ARRAY_SIZE(command))
+                pt[pte] = 0;
-                return -EINVAL;
-        info = file_inode(file)->i_private;
-        smmu = info->smmu;
-        offs = SMMU_CACHE_CONFIG(info->cache);
-        val = smmu_read(smmu, offs);
-        switch (i) {
-        case _OFF:
-                val &= ~SMMU_CACHE_CONFIG_STATS_ENABLE;
-                val &= ~SMMU_CACHE_CONFIG_STATS_TEST;
-                smmu_write(smmu, val, offs);
-                break;
-        case _ON:
-                val |= SMMU_CACHE_CONFIG_STATS_ENABLE;
-                val &= ~SMMU_CACHE_CONFIG_STATS_TEST;
-                smmu_write(smmu, val, offs);
-                break;
-        case _RESET:
-                val |= SMMU_CACHE_CONFIG_STATS_TEST;
-                smmu_write(smmu, val, offs);
-                val &= ~SMMU_CACHE_CONFIG_STATS_TEST;
-                smmu_write(smmu, val, offs);
-                break;
-        default:
-                BUG();
-                break;
        }
-        dev_dbg(smmu->dev, "%s() %08x, %08x @%08x\n", __func__,
-                val, smmu_read(smmu, offs), offs);
-        return count;
 }
-static int smmu_debugfs_stats_show(struct seq_file *s, void *v)
+static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova,
+                          phys_addr_t paddr, size_t size, int prot)
 {
-        struct smmu_debugfs_info *info = s->private;
+        struct tegra_smmu_as *as = domain->priv;
-        struct smmu_device *smmu = info->smmu;
+        struct tegra_smmu *smmu = as->smmu;
-        int i;
+        unsigned long offset;
-        const char * const stats[] = { "hit", "miss", };
+        struct page *page;
+        u32 *pte;
+        pte = as_get_pte(as, iova, &page);
+        if (!pte)
+                return -ENOMEM;
-        for (i = 0; i < ARRAY_SIZE(stats); i++) {
+        *pte = __phys_to_pfn(paddr) | SMMU_PTE_ATTR;
-                u32 val;
+        offset = offset_in_page(pte);
-                size_t offs;
-                offs = SMMU_STATS_CACHE_COUNT(info->mc, info->cache, i);
+        smmu->soc->ops->flush_dcache(page, offset, 4);
-                val = smmu_read(smmu, offs);
+        smmu_flush_ptc(smmu, page, offset);
-                seq_printf(s, "%s:%08x ", stats[i], val);
+        smmu_flush_tlb_group(smmu, as->id, iova);
+        smmu_flush(smmu);
-                dev_dbg(smmu->dev, "%s() %s %08x @%08x\n", __func__,
-                        stats[i], val, offs);
-        }
-        seq_printf(s, "\n");
        return 0;
 }
-static int smmu_debugfs_stats_open(struct inode *inode, struct file *file)
+static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
+                               size_t size)
 {
-        return single_open(file, smmu_debugfs_stats_show, inode->i_private);
+        struct tegra_smmu_as *as = domain->priv;
-}
+        struct tegra_smmu *smmu = as->smmu;
+        unsigned long offset;
+        struct page *page;
+        u32 *pte;
-static const struct file_operations smmu_debugfs_stats_fops = {
+        pte = as_get_pte(as, iova, &page);
-        .open           = smmu_debugfs_stats_open,
+        if (!pte)
-        .read           = seq_read,
+                return 0;
-        .llseek         = seq_lseek,
-        .release        = single_release,
-        .write          = smmu_debugfs_stats_write,
-};
-static void smmu_debugfs_delete(struct smmu_device *smmu)
+        offset = offset_in_page(pte);
-{
+        as_put_pte(as, iova);
-        debugfs_remove_recursive(smmu->debugfs_root);
-        kfree(smmu->debugfs_info);
+        smmu->soc->ops->flush_dcache(page, offset, 4);
+        smmu_flush_ptc(smmu, page, offset);
+        smmu_flush_tlb_group(smmu, as->id, iova);
+        smmu_flush(smmu);
+        return size;
 }
-static void smmu_debugfs_create(struct smmu_device *smmu)
+static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain,
+                                           dma_addr_t iova)
 {
-        int i;
+        struct tegra_smmu_as *as = domain->priv;
-        size_t bytes;
+        struct page *page;
-        struct dentry *root;
+        unsigned long pfn;
+        u32 *pte;
-        bytes = ARRAY_SIZE(smmu_debugfs_mc) * ARRAY_SIZE(smmu_debugfs_cache) *
-                sizeof(*smmu->debugfs_info);
-        smmu->debugfs_info = kmalloc(bytes, GFP_KERNEL);
-        if (!smmu->debugfs_info)
-                return;
-        root = debugfs_create_dir(dev_name(smmu->dev), NULL);
-        if (!root)
-                goto err_out;
-        smmu->debugfs_root = root;
-        for (i = 0; i < ARRAY_SIZE(smmu_debugfs_mc); i++) {
-                int j;
-                struct dentry *mc;
-                mc = debugfs_create_dir(smmu_debugfs_mc[i], root);
-                if (!mc)
-                        goto err_out;
-                for (j = 0; j < ARRAY_SIZE(smmu_debugfs_cache); j++) {
-                        struct dentry *cache;
-                        struct smmu_debugfs_info *info;
-                        info = smmu->debugfs_info;
-                        info += i * ARRAY_SIZE(smmu_debugfs_mc) + j;
-                        info->smmu = smmu;
-                        info->mc = i;
-                        info->cache = j;
-                        cache = debugfs_create_file(smmu_debugfs_cache[j],
-                                                    S_IWUGO | S_IRUGO, mc,
-                                                    (void *)info,
-                                                    &smmu_debugfs_stats_fops);
-                        if (!cache)
-                                goto err_out;
-                }
-        }
-        return;
+        pte = as_get_pte(as, iova, &page);
+        pfn = *pte & SMMU_PFN_MASK;
-err_out:
+        return PFN_PHYS(pfn);
-        smmu_debugfs_delete(smmu);
 }
-static int tegra_smmu_suspend(struct device *dev)
+static struct tegra_smmu *tegra_smmu_find(struct device_node *np)
 {
-        struct smmu_device *smmu = dev_get_drvdata(dev);
+        struct platform_device *pdev;
+        struct tegra_mc *mc;
-        smmu->translation_enable_0 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_0);
+        pdev = of_find_device_by_node(np);
-        smmu->translation_enable_1 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_1);
+        if (!pdev)
-        smmu->translation_enable_2 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_2);
+                return NULL;
-        smmu->asid_security = smmu_read(smmu, SMMU_ASID_SECURITY);
-        return 0;
+        mc = platform_get_drvdata(pdev);
+        if (!mc)
+                return NULL;
+        return mc->smmu;
 }
-static int tegra_smmu_resume(struct device *dev)
+static int tegra_smmu_add_device(struct device *dev)
 {
-        struct smmu_device *smmu = dev_get_drvdata(dev);
+        struct device_node *np = dev->of_node;
-        unsigned long flags;
+        struct of_phandle_args args;
-        int err;
+        unsigned int index = 0;
-        spin_lock_irqsave(&smmu->lock, flags);
+        while (of_parse_phandle_with_args(np, "iommus", "#iommu-cells", index,
-        err = smmu_setup_regs(smmu);
+                                          &args) == 0) {
-        spin_unlock_irqrestore(&smmu->lock, flags);
+                struct tegra_smmu *smmu;
-        return err;
+                smmu = tegra_smmu_find(args.np);
+                if (smmu) {
+                        /*
+                         * Only a single IOMMU master interface is currently
+                         * supported by the Linux kernel, so abort after the
+                         * first match.
+                         */
+                        dev->archdata.iommu = smmu;
+                        break;
+                }
+                index++;
+        }
+        return 0;
 }
-static int tegra_smmu_probe(struct platform_device *pdev)
+static void tegra_smmu_remove_device(struct device *dev)
 {
-        struct smmu_device *smmu;
+        dev->archdata.iommu = NULL;
-        struct device *dev = &pdev->dev;
+}
-        int i, asids, err = 0;
-        dma_addr_t uninitialized_var(base);
-        size_t bytes, uninitialized_var(size);
-        if (smmu_handle)
+static const struct iommu_ops tegra_smmu_ops = {
-                return -EIO;
+        .capable = tegra_smmu_capable,
+        .domain_init = tegra_smmu_domain_init,
+        .domain_destroy = tegra_smmu_domain_destroy,
+        .attach_dev = tegra_smmu_attach_dev,
+        .detach_dev = tegra_smmu_detach_dev,
+        .add_device = tegra_smmu_add_device,
+        .remove_device = tegra_smmu_remove_device,
+        .map = tegra_smmu_map,
+        .unmap = tegra_smmu_unmap,
+        .map_sg = default_iommu_map_sg,
+        .iova_to_phys = tegra_smmu_iova_to_phys,
-        BUILD_BUG_ON(PAGE_SHIFT != SMMU_PAGE_SHIFT);
+        .pgsize_bitmap = SZ_4K,
+};
-        if (of_property_read_u32(dev->of_node, "nvidia,#asids", &asids))
+static void tegra_smmu_ahb_enable(void)
-                return -ENODEV;
+{
+        static const struct of_device_id ahb_match[] = {
+                { .compatible = "nvidia,tegra30-ahb", },
+                { }
+        };
+        struct device_node *ahb;
-        bytes = sizeof(*smmu) + asids * sizeof(*smmu->as);
+        ahb = of_find_matching_node(NULL, ahb_match);
-        smmu = devm_kzalloc(dev, bytes, GFP_KERNEL);
+        if (ahb) {
-        if (!smmu) {
+                tegra_ahb_enable_smmu(ahb);
-                dev_err(dev, "failed to allocate smmu_device\n");
+                of_node_put(ahb);
-                return -ENOMEM;
        }
+}
-        smmu->nregs = pdev->num_resources;
+struct tegra_smmu *tegra_smmu_probe(struct device *dev,
-        smmu->regs = devm_kzalloc(dev, 2 * smmu->nregs * sizeof(*smmu->regs),
+                                    const struct tegra_smmu_soc *soc,
-                                  GFP_KERNEL);
+                                    struct tegra_mc *mc)
-        smmu->rege = smmu->regs + smmu->nregs;
+{
-        if (!smmu->regs)
+        struct tegra_smmu *smmu;
-                return -ENOMEM;
+        size_t size;
-        for (i = 0; i < smmu->nregs; i++) {
+        u32 value;
-                struct resource *res;
+        int err;
-                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-                smmu->regs[i] = devm_ioremap_resource(&pdev->dev, res);
-                if (IS_ERR(smmu->regs[i]))
-                        return PTR_ERR(smmu->regs[i]);
-                smmu->rege[i] = smmu->regs[i] + resource_size(res) - 1;
-        }
-        /* Same as "mc" 1st regiter block start address */
-        smmu->regbase = (void __iomem *)((u32)smmu->regs[0] & PAGE_MASK);
-        err = of_get_dma_window(dev->of_node, NULL, 0, NULL, &base, &size);
+        /* This can happen on Tegra20 which doesn't have an SMMU */
-        if (err)
+        if (!soc)
-                return -ENODEV;
+                return NULL;
-        if (size & SMMU_PAGE_MASK)
+        smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL);
-                return -EINVAL;
+        if (!smmu)
+                return ERR_PTR(-ENOMEM);
-        size >>= SMMU_PAGE_SHIFT;
+        /*
-        if (!size)
+         * This is a bit of a hack. Ideally we'd want to simply return this
-                return -EINVAL;
+         * value. However the IOMMU registration process will attempt to add
+         * all devices to the IOMMU when bus_set_iommu() is called. In order
+         * not to rely on global variables to track the IOMMU instance, we
+         * set it here so that it can be looked up from the .add_device()
+         * callback via the IOMMU device's .drvdata field.
+         */
+        mc->smmu = smmu;
-        smmu->ahb = of_parse_phandle(dev->of_node, "nvidia,ahb", 0);
+        size = BITS_TO_LONGS(soc->num_asids) * sizeof(long);
-        if (!smmu->ahb)
-                return -ENODEV;
-        smmu->dev = dev;
+        smmu->asids = devm_kzalloc(dev, size, GFP_KERNEL);
-        smmu->num_as = asids;
+        if (!smmu->asids)
-        smmu->iovmm_base = base;
+                return ERR_PTR(-ENOMEM);
-        smmu->page_count = size;
-        smmu->translation_enable_0 = ~0;
-        smmu->translation_enable_1 = ~0;
-        smmu->translation_enable_2 = ~0;
-        smmu->asid_security = 0;
-        for (i = 0; i < smmu->num_as; i++) {
-                struct smmu_as *as = &smmu->as[i];
-                as->smmu = smmu;
-                as->asid = i;
-                as->pdir_attr = _PDIR_ATTR;
-                as->pde_attr = _PDE_ATTR;
-                as->pte_attr = _PTE_ATTR;
-                spin_lock_init(&as->lock);
-                spin_lock_init(&as->client_lock);
-                INIT_LIST_HEAD(&as->client);
-        }
-        spin_lock_init(&smmu->lock);
-        err = smmu_setup_regs(smmu);
-        if (err)
-                return err;
-        platform_set_drvdata(pdev, smmu);
-        smmu->avp_vector_page = alloc_page(GFP_KERNEL);
+        mutex_init(&smmu->lock);
-        if (!smmu->avp_vector_page)
-                return -ENOMEM;
-        smmu_debugfs_create(smmu);
+        smmu->regs = mc->regs;
-        smmu_handle = smmu;
+        smmu->soc = soc;
-        bus_set_iommu(&platform_bus_type, &smmu_iommu_ops);
+        smmu->dev = dev;
-        return 0;
+        smmu->mc = mc;
-}
-static int tegra_smmu_remove(struct platform_device *pdev)
+        value = SMMU_PTC_CONFIG_ENABLE | SMMU_PTC_CONFIG_INDEX_MAP(0x3f);
-{
-        struct smmu_device *smmu = platform_get_drvdata(pdev);
-        int i;
-        smmu_debugfs_delete(smmu);
+        if (soc->supports_request_limit)
+                value |= SMMU_PTC_CONFIG_REQ_LIMIT(8);
-        smmu_write(smmu, SMMU_CONFIG_DISABLE, SMMU_CONFIG);
+        smmu_writel(smmu, value, SMMU_PTC_CONFIG);
-        for (i = 0; i < smmu->num_as; i++)
-                free_pdir(&smmu->as[i]);
-        __free_page(smmu->avp_vector_page);
-        smmu_handle = NULL;
-        return 0;
-}
-static const struct dev_pm_ops tegra_smmu_pm_ops = {
+        value = SMMU_TLB_CONFIG_HIT_UNDER_MISS |
-        .suspend        = tegra_smmu_suspend,
+                SMMU_TLB_CONFIG_ACTIVE_LINES(0x20);
-        .resume         = tegra_smmu_resume,
-};
-static const struct of_device_id tegra_smmu_of_match[] = {
+        if (soc->supports_round_robin_arbitration)
-        { .compatible = "nvidia,tegra30-smmu", },
+                value |= SMMU_TLB_CONFIG_ROUND_ROBIN_ARBITRATION;
-        { },
-};
-MODULE_DEVICE_TABLE(of, tegra_smmu_of_match);
-static struct platform_driver tegra_smmu_driver = {
-        .probe          = tegra_smmu_probe,
-        .remove         = tegra_smmu_remove,
-        .driver = {
-                .owner  = THIS_MODULE,
-                .name   = "tegra-smmu",
-                .pm     = &tegra_smmu_pm_ops,
-                .of_match_table = tegra_smmu_of_match,
-        },
-};
-static int tegra_smmu_init(void)
+        smmu_writel(smmu, value, SMMU_TLB_CONFIG);
-{
-        return platform_driver_register(&tegra_smmu_driver);
-}
-static void __exit tegra_smmu_exit(void)
+        smmu_flush_ptc(smmu, NULL, 0);
-{
+        smmu_flush_tlb(smmu);
-        platform_driver_unregister(&tegra_smmu_driver);
+        smmu_writel(smmu, SMMU_CONFIG_ENABLE, SMMU_CONFIG);
-}
+        smmu_flush(smmu);
+        tegra_smmu_ahb_enable();
-subsys_initcall(tegra_smmu_init);
+        err = bus_set_iommu(&platform_bus_type, &tegra_smmu_ops);
-module_exit(tegra_smmu_exit);
+        if (err < 0)
+                return ERR_PTR(err);
-MODULE_DESCRIPTION("IOMMU API for SMMU in Tegra30");
+        return smmu;
-MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>");
+}
-MODULE_ALIAS("platform:tegra-smmu");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
index 6d91c27fd4c8..08bd4cfca2a4 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -61,16 +61,6 @@ config TEGRA20_MC
          analysis, especially for IOMMU/GART(Graphics Address
          Relocation Table) module.
-config TEGRA30_MC
-        bool "Tegra30 Memory Controller(MC) driver"
-        default y
-        depends on ARCH_TEGRA_3x_SOC
-        help
-          This driver is for the Memory Controller(MC) module available
-          in Tegra30 SoCs, mainly for a address translation fault
-          analysis, especially for IOMMU/SMMU(System Memory Management
-          Unit) module.
 config FSL_CORENET_CF
        tristate "Freescale CoreNet Error Reporting"
        depends on FSL_SOC_BOOKE
@@ -85,4 +75,6 @@ config FSL_IFC
        bool
        depends on FSL_SOC
+source "drivers/memory/tegra/Kconfig"
 endif
diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile
index c32d31981be3..ad98bb232623 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -12,4 +12,5 @@ obj-$(CONFIG_FSL_CORENET_CF)	+= fsl-corenet-cf.o
 obj-$(CONFIG_FSL_IFC)           += fsl_ifc.o
 obj-$(CONFIG_MVEBU_DEVBUS)      += mvebu-devbus.o
 obj-$(CONFIG_TEGRA20_MC)        += tegra20-mc.o
-obj-$(CONFIG_TEGRA30_MC)        += tegra30-mc.o
+obj-$(CONFIG_TEGRA_MC)          += tegra/
diff --git a/drivers/memory/tegra/Kconfig b/drivers/memory/tegra/Kconfig
new file mode 100644
index 000000000000..571087621827
--- /dev/null
+++ b/drivers/memory/tegra/Kconfig
@@ -0,0 +1,7 @@
+config TEGRA_MC
+        bool "NVIDIA Tegra Memory Controller support"
+        default y
+        depends on ARCH_TEGRA
+        help
+          This driver supports the Memory Controller (MC) hardware found on
+          NVIDIA Tegra SoCs.
diff --git a/drivers/memory/tegra/Makefile b/drivers/memory/tegra/Makefile
new file mode 100644
index 000000000000..0d9f497b786c
--- /dev/null
+++ b/drivers/memory/tegra/Makefile
@@ -0,0 +1,7 @@
+tegra-mc-y := mc.o
+tegra-mc-$(CONFIG_ARCH_TEGRA_3x_SOC)  += tegra30.o
+tegra-mc-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114.o
+tegra-mc-$(CONFIG_ARCH_TEGRA_124_SOC) += tegra124.o
+obj-$(CONFIG_TEGRA_MC) += tegra-mc.o
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
new file mode 100644
index 000000000000..fe3c44e7e1d1
--- /dev/null
+++ b/drivers/memory/tegra/mc.c
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include "mc.h"
+#define MC_INTSTATUS 0x000
+#define  MC_INT_DECERR_MTS (1 << 16)
+#define  MC_INT_SECERR_SEC (1 << 13)
+#define  MC_INT_DECERR_VPR (1 << 12)
+#define  MC_INT_INVALID_APB_ASID_UPDATE (1 << 11)
+#define  MC_INT_INVALID_SMMU_PAGE (1 << 10)
+#define  MC_INT_ARBITRATION_EMEM (1 << 9)
+#define  MC_INT_SECURITY_VIOLATION (1 << 8)
+#define  MC_INT_DECERR_EMEM (1 << 6)
+#define MC_INTMASK 0x004
+#define MC_ERR_STATUS 0x08
+#define  MC_ERR_STATUS_TYPE_SHIFT 28
+#define  MC_ERR_STATUS_TYPE_INVALID_SMMU_PAGE (6 << MC_ERR_STATUS_TYPE_SHIFT)
+#define  MC_ERR_STATUS_TYPE_MASK (0x7 << MC_ERR_STATUS_TYPE_SHIFT)
+#define  MC_ERR_STATUS_READABLE (1 << 27)
+#define  MC_ERR_STATUS_WRITABLE (1 << 26)
+#define  MC_ERR_STATUS_NONSECURE (1 << 25)
+#define  MC_ERR_STATUS_ADR_HI_SHIFT 20
+#define  MC_ERR_STATUS_ADR_HI_MASK 0x3
+#define  MC_ERR_STATUS_SECURITY (1 << 17)
+#define  MC_ERR_STATUS_RW (1 << 16)
+#define  MC_ERR_STATUS_CLIENT_MASK 0x7f
+#define MC_ERR_ADR 0x0c
+#define MC_EMEM_ARB_CFG 0x90
+#define  MC_EMEM_ARB_CFG_CYCLES_PER_UPDATE(x)   (((x) & 0x1ff) << 0)
+#define  MC_EMEM_ARB_CFG_CYCLES_PER_UPDATE_MASK 0x1ff
+#define MC_EMEM_ARB_MISC0 0xd8
+static const struct of_device_id tegra_mc_of_match[] = {
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+        { .compatible = "nvidia,tegra30-mc", .data = &tegra30_mc_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+        { .compatible = "nvidia,tegra114-mc", .data = &tegra114_mc_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+        { .compatible = "nvidia,tegra124-mc", .data = &tegra124_mc_soc },
+#endif
+        { }
+};
+MODULE_DEVICE_TABLE(of, tegra_mc_of_match);
+static int tegra_mc_setup_latency_allowance(struct tegra_mc *mc)
+{
+        unsigned long long tick;
+        unsigned int i;
+        u32 value;
+        /* compute the number of MC clock cycles per tick */
+        tick = mc->tick * clk_get_rate(mc->clk);
+        do_div(tick, NSEC_PER_SEC);
+        value = readl(mc->regs + MC_EMEM_ARB_CFG);
+        value &= ~MC_EMEM_ARB_CFG_CYCLES_PER_UPDATE_MASK;
+        value |= MC_EMEM_ARB_CFG_CYCLES_PER_UPDATE(tick);
+        writel(value, mc->regs + MC_EMEM_ARB_CFG);
+        /* write latency allowance defaults */
+        for (i = 0; i < mc->soc->num_clients; i++) {
+                const struct tegra_mc_la *la = &mc->soc->clients[i].la;
+                u32 value;
+                value = readl(mc->regs + la->reg);
+                value &= ~(la->mask << la->shift);
+                value |= (la->def & la->mask) << la->shift;
+                writel(value, mc->regs + la->reg);
+        }
+        return 0;
+}
+static const char *const status_names[32] = {
+        [ 1] = "External interrupt",
+        [ 6] = "EMEM address decode error",
+        [ 8] = "Security violation",
+        [ 9] = "EMEM arbitration error",
+        [10] = "Page fault",
+        [11] = "Invalid APB ASID update",
+        [12] = "VPR violation",
+        [13] = "Secure carveout violation",
+        [16] = "MTS carveout violation",
+};
+static const char *const error_names[8] = {
+        [2] = "EMEM decode error",
+        [3] = "TrustZone violation",
+        [4] = "Carveout violation",
+        [6] = "SMMU translation error",
+};
+static irqreturn_t tegra_mc_irq(int irq, void *data)
+{
+        struct tegra_mc *mc = data;
+        unsigned long status, mask;
+        unsigned int bit;
+        /* mask all interrupts to avoid flooding */
+        status = mc_readl(mc, MC_INTSTATUS);
+        mask = mc_readl(mc, MC_INTMASK);
+        for_each_set_bit(bit, &status, 32) {
+                const char *error = status_names[bit] ?: "unknown";
+                const char *client = "unknown", *desc;
+                const char *direction, *secure;
+                phys_addr_t addr = 0;
+                unsigned int i;
+                char perm[7];
+                u8 id, type;
+                u32 value;
+                value = mc_readl(mc, MC_ERR_STATUS);
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+                if (mc->soc->num_address_bits > 32) {
+                        addr = ((value >> MC_ERR_STATUS_ADR_HI_SHIFT) &
+                                MC_ERR_STATUS_ADR_HI_MASK);
+                        addr <<= 32;
+                }
+#endif
+                if (value & MC_ERR_STATUS_RW)
+                        direction = "write";
+                else
+                        direction = "read";
+                if (value & MC_ERR_STATUS_SECURITY)
+                        secure = "secure ";
+                else
+                        secure = "";
+                id = value & MC_ERR_STATUS_CLIENT_MASK;
+                for (i = 0; i < mc->soc->num_clients; i++) {
+                        if (mc->soc->clients[i].id == id) {
+                                client = mc->soc->clients[i].name;
+                                break;
+                        }
+                }
+                type = (value & MC_ERR_STATUS_TYPE_MASK) >>
+                       MC_ERR_STATUS_TYPE_SHIFT;
+                desc = error_names[type];
+                switch (value & MC_ERR_STATUS_TYPE_MASK) {
+                case MC_ERR_STATUS_TYPE_INVALID_SMMU_PAGE:
+                        perm[0] = ' ';
+                        perm[1] = '[';
+                        if (value & MC_ERR_STATUS_READABLE)
+                                perm[2] = 'R';
+                        else
+                                perm[2] = '-';
+                        if (value & MC_ERR_STATUS_WRITABLE)
+                                perm[3] = 'W';
+                        else
+                                perm[3] = '-';
+                        if (value & MC_ERR_STATUS_NONSECURE)
+                                perm[4] = '-';
+                        else
+                                perm[4] = 'S';
+                        perm[5] = ']';
+                        perm[6] = '\0';
+                        break;
+                default:
+                        perm[0] = '\0';
+                        break;
+                }
+                value = mc_readl(mc, MC_ERR_ADR);
+                addr |= value;
+                dev_err_ratelimited(mc->dev, "%s: %s%s @%pa: %s (%s%s)\n",
+                                    client, secure, direction, &addr, error,
+                                    desc, perm);
+        }
+        /* clear interrupts */
+        mc_writel(mc, status, MC_INTSTATUS);
+        return IRQ_HANDLED;
+}
+static int tegra_mc_probe(struct platform_device *pdev)
+{
+        const struct of_device_id *match;
+        struct resource *res;
+        struct tegra_mc *mc;
+        u32 value;
+        int err;
+        match = of_match_node(tegra_mc_of_match, pdev->dev.of_node);
+        if (!match)
+                return -ENODEV;
+        mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
+        if (!mc)
+                return -ENOMEM;
+        platform_set_drvdata(pdev, mc);
+        mc->soc = match->data;
+        mc->dev = &pdev->dev;
+        /* length of MC tick in nanoseconds */
+        mc->tick = 30;
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        mc->regs = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(mc->regs))
+                return PTR_ERR(mc->regs);
+        mc->clk = devm_clk_get(&pdev->dev, "mc");
+        if (IS_ERR(mc->clk)) {
+                dev_err(&pdev->dev, "failed to get MC clock: %ld\n",
+                        PTR_ERR(mc->clk));
+                return PTR_ERR(mc->clk);
+        }
+        err = tegra_mc_setup_latency_allowance(mc);
+        if (err < 0) {
+                dev_err(&pdev->dev, "failed to setup latency allowance: %d\n",
+                        err);
+                return err;
+        }
+        if (IS_ENABLED(CONFIG_TEGRA_IOMMU_SMMU)) {
+                mc->smmu = tegra_smmu_probe(&pdev->dev, mc->soc->smmu, mc);
+                if (IS_ERR(mc->smmu)) {
+                        dev_err(&pdev->dev, "failed to probe SMMU: %ld\n",
+                                PTR_ERR(mc->smmu));
+                        return PTR_ERR(mc->smmu);
+                }
+        }
+        mc->irq = platform_get_irq(pdev, 0);
+        if (mc->irq < 0) {
+                dev_err(&pdev->dev, "interrupt not specified\n");
+                return mc->irq;
+        }
+        err = devm_request_irq(&pdev->dev, mc->irq, tegra_mc_irq, IRQF_SHARED,
+                               dev_name(&pdev->dev), mc);
+        if (err < 0) {
+                dev_err(&pdev->dev, "failed to request IRQ#%u: %d\n", mc->irq,
+                        err);
+                return err;
+        }
+        value = MC_INT_DECERR_MTS | MC_INT_SECERR_SEC | MC_INT_DECERR_VPR |
+                MC_INT_INVALID_APB_ASID_UPDATE | MC_INT_INVALID_SMMU_PAGE |
+                MC_INT_ARBITRATION_EMEM | MC_INT_SECURITY_VIOLATION |
+                MC_INT_DECERR_EMEM;
+        mc_writel(mc, value, MC_INTMASK);
+        return 0;
+}
+static struct platform_driver tegra_mc_driver = {
+        .driver = {
+                .name = "tegra-mc",
+                .of_match_table = tegra_mc_of_match,
+                .suppress_bind_attrs = true,
+        },
+        .prevent_deferred_probe = true,
+        .probe = tegra_mc_probe,
+};
+static int tegra_mc_init(void)
+{
+        return platform_driver_register(&tegra_mc_driver);
+}
+arch_initcall(tegra_mc_init);
+MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra Memory Controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/memory/tegra/mc.h b/drivers/memory/tegra/mc.h
new file mode 100644
index 000000000000..d5d21147fc77
--- /dev/null
+++ b/drivers/memory/tegra/mc.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef MEMORY_TEGRA_MC_H
+#define MEMORY_TEGRA_MC_H
+#include <linux/io.h>
+#include <linux/types.h>
+#include <soc/tegra/mc.h>
+static inline u32 mc_readl(struct tegra_mc *mc, unsigned long offset)
+{
+        return readl(mc->regs + offset);
+}
+static inline void mc_writel(struct tegra_mc *mc, u32 value,
+                             unsigned long offset)
+{
+        writel(value, mc->regs + offset);
+}
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+extern const struct tegra_mc_soc tegra30_mc_soc;
+#endif
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+extern const struct tegra_mc_soc tegra114_mc_soc;
+#endif
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+extern const struct tegra_mc_soc tegra124_mc_soc;
+#endif
+#endif /* MEMORY_TEGRA_MC_H */
diff --git a/drivers/memory/tegra/tegra114.c b/drivers/memory/tegra/tegra114.c
new file mode 100644
index 000000000000..511e9a25c151
--- /dev/null
+++ b/drivers/memory/tegra/tegra114.c
@@ -0,0 +1,948 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/of.h>
+#include <linux/mm.h>
+#include <asm/cacheflush.h>
+#include <dt-bindings/memory/tegra114-mc.h>
+#include "mc.h"
+static const struct tegra_mc_client tegra114_mc_clients[] = {
+        {
+                .id = 0x00,
+                .name = "ptcr",
+                .swgroup = TEGRA_SWGROUP_PTC,
+        }, {
+                .id = 0x01,
+                .name = "display0a",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x2e8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x02,
+                .name = "display0ab",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 2,
+                },
+                .la = {
+                        .reg = 0x2f4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x03,
+                .name = "display0b",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 3,
+                },
+                .la = {
+                        .reg = 0x2e8,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x04,
+                .name = "display0bb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x2f4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x05,
+                .name = "display0c",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 5,
+                },
+                .la = {
+                        .reg = 0x2ec,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x06,
+                .name = "display0cb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 6,
+                },
+                .la = {
+                        .reg = 0x2f8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x09,
+                .name = "eppup",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 9,
+                },
+                .la = {
+                        .reg = 0x300,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x33,
+                },
+        }, {
+                .id = 0x0a,
+                .name = "g2pr",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 10,
+                },
+                .la = {
+                        .reg = 0x308,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x09,
+                },
+        }, {
+                .id = 0x0b,
+                .name = "g2sr",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 11,
+                },
+                .la = {
+                        .reg = 0x308,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x09,
+                },
+        }, {
+                .id = 0x0f,
+                .name = "avpcarm7r",
+                .swgroup = TEGRA_SWGROUP_AVPC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 15,
+                },
+                .la = {
+                        .reg = 0x2e4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x10,
+                .name = "displayhc",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 16,
+                },
+                .la = {
+                        .reg = 0x2f0,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x68,
+                },
+        }, {
+                .id = 0x11,
+                .name = "displayhcb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 17,
+                },
+                .la = {
+                        .reg = 0x2fc,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x68,
+                },
+        }, {
+                .id = 0x12,
+                .name = "fdcdrd",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 18,
+                },
+                .la = {
+                        .reg = 0x334,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0c,
+                },
+        }, {
+                .id = 0x13,
+                .name = "fdcdrd2",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 19,
+                },
+                .la = {
+                        .reg = 0x33c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0c,
+                },
+        }, {
+                .id = 0x14,
+                .name = "g2dr",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 20,
+                },
+                .la = {
+                        .reg = 0x30c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0a,
+                },
+        }, {
+                .id = 0x15,
+                .name = "hdar",
+                .swgroup = TEGRA_SWGROUP_HDA,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x318,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x16,
+                .name = "host1xdmar",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 22,
+                },
+                .la = {
+                        .reg = 0x310,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x17,
+                .name = "host1xr",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 23,
+                },
+                .la = {
+                        .reg = 0x310,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xa5,
+                },
+        }, {
+                .id = 0x18,
+                .name = "idxsrd",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 24,
+                },
+                .la = {
+                        .reg = 0x334,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0b,
+                },
+        }, {
+                .id = 0x1c,
+                .name = "msencsrd",
+                .swgroup = TEGRA_SWGROUP_MSENC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 28,
+                },
+                .la = {
+                        .reg = 0x328,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x1d,
+                .name = "ppcsahbdmar",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 29,
+                },
+                .la = {
+                        .reg = 0x344,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x1e,
+                .name = "ppcsahbslvr",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 30,
+                },
+                .la = {
+                        .reg = 0x344,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xe8,
+                },
+        }, {
+                .id = 0x20,
+                .name = "texl2srd",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 0,
+                },
+                .la = {
+                        .reg = 0x338,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0c,
+                },
+        }, {
+                .id = 0x22,
+                .name = "vdebsevr",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 2,
+                },
+                .la = {
+                        .reg = 0x354,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x23,
+                .name = "vdember",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 3,
+                },
+                .la = {
+                        .reg = 0x354,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x24,
+                .name = "vdemcer",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x358,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xb8,
+                },
+        }, {
+                .id = 0x25,
+                .name = "vdetper",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 5,
+                },
+                .la = {
+                        .reg = 0x358,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xee,
+                },
+        }, {
+                .id = 0x26,
+                .name = "mpcorelpr",
+                .swgroup = TEGRA_SWGROUP_MPCORELP,
+                .la = {
+                        .reg = 0x324,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x27,
+                .name = "mpcorer",
+                .swgroup = TEGRA_SWGROUP_MPCORE,
+                .la = {
+                        .reg = 0x320,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x28,
+                .name = "eppu",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 8,
+                },
+                .la = {
+                        .reg = 0x300,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x33,
+                },
+        }, {
+                .id = 0x29,
+                .name = "eppv",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 9,
+                },
+                .la = {
+                        .reg = 0x304,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x6c,
+                },
+        }, {
+                .id = 0x2a,
+                .name = "eppy",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 10,
+                },
+                .la = {
+                        .reg = 0x304,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x6c,
+                },
+        }, {
+                .id = 0x2b,
+                .name = "msencswr",
+                .swgroup = TEGRA_SWGROUP_MSENC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 11,
+                },
+                .la = {
+                        .reg = 0x328,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x2c,
+                .name = "viwsb",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 12,
+                },
+                .la = {
+                        .reg = 0x364,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x47,
+                },
+        }, {
+                .id = 0x2d,
+                .name = "viwu",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 13,
+                },
+                .la = {
+                        .reg = 0x368,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x2e,
+                .name = "viwv",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 14,
+                },
+                .la = {
+                        .reg = 0x368,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x2f,
+                .name = "viwy",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 15,
+                },
+                .la = {
+                        .reg = 0x36c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x47,
+                },
+        }, {
+                .id = 0x30,
+                .name = "g2dw",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 16,
+                },
+                .la = {
+                        .reg = 0x30c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x9,
+                },
+        }, {
+                .id = 0x32,
+                .name = "avpcarm7w",
+                .swgroup = TEGRA_SWGROUP_AVPC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 18,
+                },
+                .la = {
+                        .reg = 0x2e4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0e,
+                },
+        }, {
+                .id = 0x33,
+                .name = "fdcdwr",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 19,
+                },
+                .la = {
+                        .reg = 0x338,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x34,
+                .name = "fdcwr2",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 20,
+                },
+                .la = {
+                        .reg = 0x340,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x35,
+                .name = "hdaw",
+                .swgroup = TEGRA_SWGROUP_HDA,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x318,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x36,
+                .name = "host1xw",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 22,
+                },
+                .la = {
+                        .reg = 0x314,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x25,
+                },
+        }, {
+                .id = 0x37,
+                .name = "ispw",
+                .swgroup = TEGRA_SWGROUP_ISP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 23,
+                },
+                .la = {
+                        .reg = 0x31c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x38,
+                .name = "mpcorelpw",
+                .swgroup = TEGRA_SWGROUP_MPCORELP,
+                .la = {
+                        .reg = 0x324,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x39,
+                .name = "mpcorew",
+                .swgroup = TEGRA_SWGROUP_MPCORE,
+                .la = {
+                        .reg = 0x320,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0e,
+                },
+        }, {
+                .id = 0x3b,
+                .name = "ppcsahbdmaw",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 27,
+                },
+                .la = {
+                        .reg = 0x348,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xa5,
+                },
+        }, {
+                .id = 0x3c,
+                .name = "ppcsahbslvw",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 28,
+                },
+                .la = {
+                        .reg = 0x348,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xe8,
+                },
+        }, {
+                .id = 0x3e,
+                .name = "vdebsevw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 30,
+                },
+                .la = {
+                        .reg = 0x35c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x3f,
+                .name = "vdedbgw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 31,
+                },
+                .la = {
+                        .reg = 0x35c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x40,
+                .name = "vdembew",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 0,
+                },
+                .la = {
+                        .reg = 0x360,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x89,
+                },
+        }, {
+                .id = 0x41,
+                .name = "vdetpmw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x360,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x59,
+                },
+        }, {
+                .id = 0x4a,
+                .name = "xusb_hostr",
+                .swgroup = TEGRA_SWGROUP_XUSB_HOST,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 10,
+                },
+                .la = {
+                        .reg = 0x37c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xa5,
+                },
+        }, {
+                .id = 0x4b,
+                .name = "xusb_hostw",
+                .swgroup = TEGRA_SWGROUP_XUSB_HOST,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 11,
+                },
+                .la = {
+                        .reg = 0x37c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xa5,
+                },
+        }, {
+                .id = 0x4c,
+                .name = "xusb_devr",
+                .swgroup = TEGRA_SWGROUP_XUSB_DEV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 12,
+                },
+                .la = {
+                        .reg = 0x380,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xa5,
+                },
+        }, {
+                .id = 0x4d,
+                .name = "xusb_devw",
+                .swgroup = TEGRA_SWGROUP_XUSB_DEV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 13,
+                },
+                .la = {
+                        .reg = 0x380,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xa5,
+                },
+        }, {
+                .id = 0x4e,
+                .name = "fdcdwr3",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 14,
+                },
+                .la = {
+                        .reg = 0x388,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x4f,
+                .name = "fdcdrd3",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 15,
+                },
+                .la = {
+                        .reg = 0x384,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0c,
+                },
+        }, {
+                .id = 0x50,
+                .name = "fdcwr4",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 16,
+                },
+                .la = {
+                        .reg = 0x388,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x51,
+                .name = "fdcrd4",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 17,
+                },
+                .la = {
+                        .reg = 0x384,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0c,
+                },
+        }, {
+                .id = 0x52,
+                .name = "emucifr",
+                .swgroup = TEGRA_SWGROUP_EMUCIF,
+                .la = {
+                        .reg = 0x38c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x53,
+                .name = "emucifw",
+                .swgroup = TEGRA_SWGROUP_EMUCIF,
+                .la = {
+                        .reg = 0x38c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0e,
+                },
+        }, {
+                .id = 0x54,
+                .name = "tsecsrd",
+                .swgroup = TEGRA_SWGROUP_TSEC,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 20,
+                },
+                .la = {
+                        .reg = 0x390,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x55,
+                .name = "tsecswr",
+                .swgroup = TEGRA_SWGROUP_TSEC,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x390,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        },
+};
+static const struct tegra_smmu_swgroup tegra114_swgroups[] = {
+        { .swgroup = TEGRA_SWGROUP_DC,        .reg = 0x240 },
+        { .swgroup = TEGRA_SWGROUP_DCB,       .reg = 0x244 },
+        { .swgroup = TEGRA_SWGROUP_EPP,       .reg = 0x248 },
+        { .swgroup = TEGRA_SWGROUP_G2,        .reg = 0x24c },
+        { .swgroup = TEGRA_SWGROUP_AVPC,      .reg = 0x23c },
+        { .swgroup = TEGRA_SWGROUP_NV,        .reg = 0x268 },
+        { .swgroup = TEGRA_SWGROUP_HDA,       .reg = 0x254 },
+        { .swgroup = TEGRA_SWGROUP_HC,        .reg = 0x250 },
+        { .swgroup = TEGRA_SWGROUP_MSENC,     .reg = 0x264 },
+        { .swgroup = TEGRA_SWGROUP_PPCS,      .reg = 0x270 },
+        { .swgroup = TEGRA_SWGROUP_VDE,       .reg = 0x27c },
+        { .swgroup = TEGRA_SWGROUP_VI,        .reg = 0x280 },
+        { .swgroup = TEGRA_SWGROUP_ISP,       .reg = 0x258 },
+        { .swgroup = TEGRA_SWGROUP_XUSB_HOST, .reg = 0x288 },
+        { .swgroup = TEGRA_SWGROUP_XUSB_DEV,  .reg = 0x28c },
+        { .swgroup = TEGRA_SWGROUP_TSEC,      .reg = 0x294 },
+};
+static void tegra114_flush_dcache(struct page *page, unsigned long offset,
+                                  size_t size)
+{
+        phys_addr_t phys = page_to_phys(page) + offset;
+        void *virt = page_address(page) + offset;
+        __cpuc_flush_dcache_area(virt, size);
+        outer_flush_range(phys, phys + size);
+}
+static const struct tegra_smmu_ops tegra114_smmu_ops = {
+        .flush_dcache = tegra114_flush_dcache,
+};
+static const struct tegra_smmu_soc tegra114_smmu_soc = {
+        .clients = tegra114_mc_clients,
+        .num_clients = ARRAY_SIZE(tegra114_mc_clients),
+        .swgroups = tegra114_swgroups,
+        .num_swgroups = ARRAY_SIZE(tegra114_swgroups),
+        .supports_round_robin_arbitration = false,
+        .supports_request_limit = false,
+        .num_asids = 4,
+        .ops = &tegra114_smmu_ops,
+};
+const struct tegra_mc_soc tegra114_mc_soc = {
+        .clients = tegra114_mc_clients,
+        .num_clients = ARRAY_SIZE(tegra114_mc_clients),
+        .num_address_bits = 32,
+        .atom_size = 32,
+        .smmu = &tegra114_smmu_soc,
+};
diff --git a/drivers/memory/tegra/tegra124.c b/drivers/memory/tegra/tegra124.c
new file mode 100644
index 000000000000..278d40b854c1
--- /dev/null
+++ b/drivers/memory/tegra/tegra124.c
@@ -0,0 +1,995 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/of.h>
+#include <linux/mm.h>
+#include <asm/cacheflush.h>
+#include <dt-bindings/memory/tegra124-mc.h>
+#include "mc.h"
+static const struct tegra_mc_client tegra124_mc_clients[] = {
+        {
+                .id = 0x00,
+                .name = "ptcr",
+                .swgroup = TEGRA_SWGROUP_PTC,
+        }, {
+                .id = 0x01,
+                .name = "display0a",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x2e8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xc2,
+                },
+        }, {
+                .id = 0x02,
+                .name = "display0ab",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 2,
+                },
+                .la = {
+                        .reg = 0x2f4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xc6,
+                },
+        }, {
+                .id = 0x03,
+                .name = "display0b",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 3,
+                },
+                .la = {
+                        .reg = 0x2e8,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x04,
+                .name = "display0bb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x2f4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x05,
+                .name = "display0c",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 5,
+                },
+                .la = {
+                        .reg = 0x2ec,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x06,
+                .name = "display0cb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 6,
+                },
+                .la = {
+                        .reg = 0x2f8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x0e,
+                .name = "afir",
+                .swgroup = TEGRA_SWGROUP_AFI,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 14,
+                },
+                .la = {
+                        .reg = 0x2e0,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x13,
+                },
+        }, {
+                .id = 0x0f,
+                .name = "avpcarm7r",
+                .swgroup = TEGRA_SWGROUP_AVPC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 15,
+                },
+                .la = {
+                        .reg = 0x2e4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x10,
+                .name = "displayhc",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 16,
+                },
+                .la = {
+                        .reg = 0x2f0,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x11,
+                .name = "displayhcb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 17,
+                },
+                .la = {
+                        .reg = 0x2fc,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x15,
+                .name = "hdar",
+                .swgroup = TEGRA_SWGROUP_HDA,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x318,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x24,
+                },
+        }, {
+                .id = 0x16,
+                .name = "host1xdmar",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 22,
+                },
+                .la = {
+                        .reg = 0x310,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x1e,
+                },
+        }, {
+                .id = 0x17,
+                .name = "host1xr",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 23,
+                },
+                .la = {
+                        .reg = 0x310,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x1c,
+                .name = "msencsrd",
+                .swgroup = TEGRA_SWGROUP_MSENC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 28,
+                },
+                .la = {
+                        .reg = 0x328,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x23,
+                },
+        }, {
+                .id = 0x1d,
+                .name = "ppcsahbdmar",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 29,
+                },
+                .la = {
+                        .reg = 0x344,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x49,
+                },
+        }, {
+                .id = 0x1e,
+                .name = "ppcsahbslvr",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 30,
+                },
+                .la = {
+                        .reg = 0x344,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x1a,
+                },
+        }, {
+                .id = 0x1f,
+                .name = "satar",
+                .swgroup = TEGRA_SWGROUP_SATA,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 31,
+                },
+                .la = {
+                        .reg = 0x350,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x65,
+                },
+        }, {
+                .id = 0x22,
+                .name = "vdebsevr",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 2,
+                },
+                .la = {
+                        .reg = 0x354,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4f,
+                },
+        }, {
+                .id = 0x23,
+                .name = "vdember",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 3,
+                },
+                .la = {
+                        .reg = 0x354,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x3d,
+                },
+        }, {
+                .id = 0x24,
+                .name = "vdemcer",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x358,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x66,
+                },
+        }, {
+                .id = 0x25,
+                .name = "vdetper",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 5,
+                },
+                .la = {
+                        .reg = 0x358,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xa5,
+                },
+        }, {
+                .id = 0x26,
+                .name = "mpcorelpr",
+                .swgroup = TEGRA_SWGROUP_MPCORELP,
+                .la = {
+                        .reg = 0x324,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x27,
+                .name = "mpcorer",
+                .swgroup = TEGRA_SWGROUP_MPCORE,
+                .la = {
+                        .reg = 0x320,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x2b,
+                .name = "msencswr",
+                .swgroup = TEGRA_SWGROUP_MSENC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 11,
+                },
+                .la = {
+                        .reg = 0x328,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x31,
+                .name = "afiw",
+                .swgroup = TEGRA_SWGROUP_AFI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 17,
+                },
+                .la = {
+                        .reg = 0x2e0,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x32,
+                .name = "avpcarm7w",
+                .swgroup = TEGRA_SWGROUP_AVPC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 18,
+                },
+                .la = {
+                        .reg = 0x2e4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x35,
+                .name = "hdaw",
+                .swgroup = TEGRA_SWGROUP_HDA,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x318,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x36,
+                .name = "host1xw",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 22,
+                },
+                .la = {
+                        .reg = 0x314,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x38,
+                .name = "mpcorelpw",
+                .swgroup = TEGRA_SWGROUP_MPCORELP,
+                .la = {
+                        .reg = 0x324,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x39,
+                .name = "mpcorew",
+                .swgroup = TEGRA_SWGROUP_MPCORE,
+                .la = {
+                        .reg = 0x320,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x3b,
+                .name = "ppcsahbdmaw",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 27,
+                },
+                .la = {
+                        .reg = 0x348,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x3c,
+                .name = "ppcsahbslvw",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 28,
+                },
+                .la = {
+                        .reg = 0x348,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x3d,
+                .name = "sataw",
+                .swgroup = TEGRA_SWGROUP_SATA,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 29,
+                },
+                .la = {
+                        .reg = 0x350,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x65,
+                },
+        }, {
+                .id = 0x3e,
+                .name = "vdebsevw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 30,
+                },
+                .la = {
+                        .reg = 0x35c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x3f,
+                .name = "vdedbgw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 31,
+                },
+                .la = {
+                        .reg = 0x35c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x40,
+                .name = "vdembew",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 0,
+                },
+                .la = {
+                        .reg = 0x360,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x41,
+                .name = "vdetpmw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x360,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x44,
+                .name = "ispra",
+                .swgroup = TEGRA_SWGROUP_ISP2,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x370,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x18,
+                },
+        }, {
+                .id = 0x46,
+                .name = "ispwa",
+                .swgroup = TEGRA_SWGROUP_ISP2,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 6,
+                },
+                .la = {
+                        .reg = 0x374,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x47,
+                .name = "ispwb",
+                .swgroup = TEGRA_SWGROUP_ISP2,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 7,
+                },
+                .la = {
+                        .reg = 0x374,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x4a,
+                .name = "xusb_hostr",
+                .swgroup = TEGRA_SWGROUP_XUSB_HOST,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 10,
+                },
+                .la = {
+                        .reg = 0x37c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x39,
+                },
+        }, {
+                .id = 0x4b,
+                .name = "xusb_hostw",
+                .swgroup = TEGRA_SWGROUP_XUSB_HOST,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 11,
+                },
+                .la = {
+                        .reg = 0x37c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x4c,
+                .name = "xusb_devr",
+                .swgroup = TEGRA_SWGROUP_XUSB_DEV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 12,
+                },
+                .la = {
+                        .reg = 0x380,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x39,
+                },
+        }, {
+                .id = 0x4d,
+                .name = "xusb_devw",
+                .swgroup = TEGRA_SWGROUP_XUSB_DEV,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 13,
+                },
+                .la = {
+                        .reg = 0x380,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x4e,
+                .name = "isprab",
+                .swgroup = TEGRA_SWGROUP_ISP2B,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 14,
+                },
+                .la = {
+                        .reg = 0x384,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x18,
+                },
+        }, {
+                .id = 0x50,
+                .name = "ispwab",
+                .swgroup = TEGRA_SWGROUP_ISP2B,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 16,
+                },
+                .la = {
+                        .reg = 0x388,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x51,
+                .name = "ispwbb",
+                .swgroup = TEGRA_SWGROUP_ISP2B,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 17,
+                },
+                .la = {
+                        .reg = 0x388,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x54,
+                .name = "tsecsrd",
+                .swgroup = TEGRA_SWGROUP_TSEC,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 20,
+                },
+                .la = {
+                        .reg = 0x390,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x9b,
+                },
+        }, {
+                .id = 0x55,
+                .name = "tsecswr",
+                .swgroup = TEGRA_SWGROUP_TSEC,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x390,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x56,
+                .name = "a9avpscr",
+                .swgroup = TEGRA_SWGROUP_A9AVP,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 22,
+                },
+                .la = {
+                        .reg = 0x3a4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x57,
+                .name = "a9avpscw",
+                .swgroup = TEGRA_SWGROUP_A9AVP,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 23,
+                },
+                .la = {
+                        .reg = 0x3a4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x58,
+                .name = "gpusrd",
+                .swgroup = TEGRA_SWGROUP_GPU,
+                .smmu = {
+                        /* read-only */
+                        .reg = 0x230,
+                        .bit = 24,
+                },
+                .la = {
+                        .reg = 0x3c8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x1a,
+                },
+        }, {
+                .id = 0x59,
+                .name = "gpuswr",
+                .swgroup = TEGRA_SWGROUP_GPU,
+                .smmu = {
+                        /* read-only */
+                        .reg = 0x230,
+                        .bit = 25,
+                },
+                .la = {
+                        .reg = 0x3c8,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x5a,
+                .name = "displayt",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 26,
+                },
+                .la = {
+                        .reg = 0x2f0,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x60,
+                .name = "sdmmcra",
+                .swgroup = TEGRA_SWGROUP_SDMMC1A,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 0,
+                },
+                .la = {
+                        .reg = 0x3b8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x49,
+                },
+        }, {
+                .id = 0x61,
+                .name = "sdmmcraa",
+                .swgroup = TEGRA_SWGROUP_SDMMC2A,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x3bc,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x49,
+                },
+        }, {
+                .id = 0x62,
+                .name = "sdmmcr",
+                .swgroup = TEGRA_SWGROUP_SDMMC3A,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 2,
+                },
+                .la = {
+                        .reg = 0x3c0,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x49,
+                },
+        }, {
+                .id = 0x63,
+                .swgroup = TEGRA_SWGROUP_SDMMC4A,
+                .name = "sdmmcrab",
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 3,
+                },
+                .la = {
+                        .reg = 0x3c4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x49,
+                },
+        }, {
+                .id = 0x64,
+                .name = "sdmmcwa",
+                .swgroup = TEGRA_SWGROUP_SDMMC1A,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x3b8,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x65,
+                .name = "sdmmcwaa",
+                .swgroup = TEGRA_SWGROUP_SDMMC2A,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 5,
+                },
+                .la = {
+                        .reg = 0x3bc,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x66,
+                .name = "sdmmcw",
+                .swgroup = TEGRA_SWGROUP_SDMMC3A,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 6,
+                },
+                .la = {
+                        .reg = 0x3c0,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x67,
+                .name = "sdmmcwab",
+                .swgroup = TEGRA_SWGROUP_SDMMC4A,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 7,
+                },
+                .la = {
+                        .reg = 0x3c4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x6c,
+                .name = "vicsrd",
+                .swgroup = TEGRA_SWGROUP_VIC,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 12,
+                },
+                .la = {
+                        .reg = 0x394,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x1a,
+                },
+        }, {
+                .id = 0x6d,
+                .name = "vicswr",
+                .swgroup = TEGRA_SWGROUP_VIC,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 13,
+                },
+                .la = {
+                        .reg = 0x394,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x72,
+                .name = "viw",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 18,
+                },
+                .la = {
+                        .reg = 0x398,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x73,
+                .name = "displayd",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x234,
+                        .bit = 19,
+                },
+                .la = {
+                        .reg = 0x3c8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        },
+};
+static const struct tegra_smmu_swgroup tegra124_swgroups[] = {
+        { .swgroup = TEGRA_SWGROUP_DC,        .reg = 0x240 },
+        { .swgroup = TEGRA_SWGROUP_DCB,       .reg = 0x244 },
+        { .swgroup = TEGRA_SWGROUP_AFI,       .reg = 0x238 },
+        { .swgroup = TEGRA_SWGROUP_AVPC,      .reg = 0x23c },
+        { .swgroup = TEGRA_SWGROUP_HDA,       .reg = 0x254 },
+        { .swgroup = TEGRA_SWGROUP_HC,        .reg = 0x250 },
+        { .swgroup = TEGRA_SWGROUP_MSENC,     .reg = 0x264 },
+        { .swgroup = TEGRA_SWGROUP_PPCS,      .reg = 0x270 },
+        { .swgroup = TEGRA_SWGROUP_SATA,      .reg = 0x274 },
+        { .swgroup = TEGRA_SWGROUP_VDE,       .reg = 0x27c },
+        { .swgroup = TEGRA_SWGROUP_ISP2,      .reg = 0x258 },
+        { .swgroup = TEGRA_SWGROUP_XUSB_HOST, .reg = 0x288 },
+        { .swgroup = TEGRA_SWGROUP_XUSB_DEV,  .reg = 0x28c },
+        { .swgroup = TEGRA_SWGROUP_ISP2B,     .reg = 0xaa4 },
+        { .swgroup = TEGRA_SWGROUP_TSEC,      .reg = 0x294 },
+        { .swgroup = TEGRA_SWGROUP_A9AVP,     .reg = 0x290 },
+        { .swgroup = TEGRA_SWGROUP_GPU,       .reg = 0xaac },
+        { .swgroup = TEGRA_SWGROUP_SDMMC1A,   .reg = 0xa94 },
+        { .swgroup = TEGRA_SWGROUP_SDMMC2A,   .reg = 0xa98 },
+        { .swgroup = TEGRA_SWGROUP_SDMMC3A,   .reg = 0xa9c },
+        { .swgroup = TEGRA_SWGROUP_SDMMC4A,   .reg = 0xaa0 },
+        { .swgroup = TEGRA_SWGROUP_VIC,       .reg = 0x284 },
+        { .swgroup = TEGRA_SWGROUP_VI,        .reg = 0x280 },
+};
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+static void tegra124_flush_dcache(struct page *page, unsigned long offset,
+                                  size_t size)
+{
+        phys_addr_t phys = page_to_phys(page) + offset;
+        void *virt = page_address(page) + offset;
+        __cpuc_flush_dcache_area(virt, size);
+        outer_flush_range(phys, phys + size);
+}
+static const struct tegra_smmu_ops tegra124_smmu_ops = {
+        .flush_dcache = tegra124_flush_dcache,
+};
+static const struct tegra_smmu_soc tegra124_smmu_soc = {
+        .clients = tegra124_mc_clients,
+        .num_clients = ARRAY_SIZE(tegra124_mc_clients),
+        .swgroups = tegra124_swgroups,
+        .num_swgroups = ARRAY_SIZE(tegra124_swgroups),
+        .supports_round_robin_arbitration = true,
+        .supports_request_limit = true,
+        .num_asids = 128,
+        .ops = &tegra124_smmu_ops,
+};
+const struct tegra_mc_soc tegra124_mc_soc = {
+        .clients = tegra124_mc_clients,
+        .num_clients = ARRAY_SIZE(tegra124_mc_clients),
+        .num_address_bits = 34,
+        .atom_size = 32,
+        .smmu = &tegra124_smmu_soc,
+};
+#endif /* CONFIG_ARCH_TEGRA_124_SOC */
diff --git a/drivers/memory/tegra/tegra30.c b/drivers/memory/tegra/tegra30.c
new file mode 100644
index 000000000000..71fe9376fe53
--- /dev/null
+++ b/drivers/memory/tegra/tegra30.c
@@ -0,0 +1,970 @@
+/*
+ * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/of.h>
+#include <linux/mm.h>
+#include <asm/cacheflush.h>
+#include <dt-bindings/memory/tegra30-mc.h>
+#include "mc.h"
+static const struct tegra_mc_client tegra30_mc_clients[] = {
+        {
+                .id = 0x00,
+                .name = "ptcr",
+                .swgroup = TEGRA_SWGROUP_PTC,
+        }, {
+                .id = 0x01,
+                .name = "display0a",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x2e8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x02,
+                .name = "display0ab",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 2,
+                },
+                .la = {
+                        .reg = 0x2f4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x03,
+                .name = "display0b",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 3,
+                },
+                .la = {
+                        .reg = 0x2e8,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x04,
+                .name = "display0bb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x2f4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x05,
+                .name = "display0c",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 5,
+                },
+                .la = {
+                        .reg = 0x2ec,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x06,
+                .name = "display0cb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 6,
+                },
+                .la = {
+                        .reg = 0x2f8,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x07,
+                .name = "display1b",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 7,
+                },
+                .la = {
+                        .reg = 0x2ec,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x08,
+                .name = "display1bb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 8,
+                },
+                .la = {
+                        .reg = 0x2f8,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x4e,
+                },
+        }, {
+                .id = 0x09,
+                .name = "eppup",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 9,
+                },
+                .la = {
+                        .reg = 0x300,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x17,
+                },
+        }, {
+                .id = 0x0a,
+                .name = "g2pr",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 10,
+                },
+                .la = {
+                        .reg = 0x308,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x09,
+                },
+        }, {
+                .id = 0x0b,
+                .name = "g2sr",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 11,
+                },
+                .la = {
+                        .reg = 0x308,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x09,
+                },
+        }, {
+                .id = 0x0c,
+                .name = "mpeunifbr",
+                .swgroup = TEGRA_SWGROUP_MPE,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 12,
+                },
+                .la = {
+                        .reg = 0x328,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x0d,
+                .name = "viruv",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 13,
+                },
+                .la = {
+                        .reg = 0x364,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x2c,
+                },
+        }, {
+                .id = 0x0e,
+                .name = "afir",
+                .swgroup = TEGRA_SWGROUP_AFI,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 14,
+                },
+                .la = {
+                        .reg = 0x2e0,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x0f,
+                .name = "avpcarm7r",
+                .swgroup = TEGRA_SWGROUP_AVPC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 15,
+                },
+                .la = {
+                        .reg = 0x2e4,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x10,
+                .name = "displayhc",
+                .swgroup = TEGRA_SWGROUP_DC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 16,
+                },
+                .la = {
+                        .reg = 0x2f0,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x11,
+                .name = "displayhcb",
+                .swgroup = TEGRA_SWGROUP_DCB,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 17,
+                },
+                .la = {
+                        .reg = 0x2fc,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x12,
+                .name = "fdcdrd",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 18,
+                },
+                .la = {
+                        .reg = 0x334,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0a,
+                },
+        }, {
+                .id = 0x13,
+                .name = "fdcdrd2",
+                .swgroup = TEGRA_SWGROUP_NV2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 19,
+                },
+                .la = {
+                        .reg = 0x33c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0a,
+                },
+        }, {
+                .id = 0x14,
+                .name = "g2dr",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 20,
+                },
+                .la = {
+                        .reg = 0x30c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x0a,
+                },
+        }, {
+                .id = 0x15,
+                .name = "hdar",
+                .swgroup = TEGRA_SWGROUP_HDA,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x318,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x16,
+                .name = "host1xdmar",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 22,
+                },
+                .la = {
+                        .reg = 0x310,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x05,
+                },
+        }, {
+                .id = 0x17,
+                .name = "host1xr",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 23,
+                },
+                .la = {
+                        .reg = 0x310,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x50,
+                },
+        }, {
+                .id = 0x18,
+                .name = "idxsrd",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 24,
+                },
+                .la = {
+                        .reg = 0x334,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x13,
+                },
+        }, {
+                .id = 0x19,
+                .name = "idxsrd2",
+                .swgroup = TEGRA_SWGROUP_NV2,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 25,
+                },
+                .la = {
+                        .reg = 0x33c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x13,
+                },
+        }, {
+                .id = 0x1a,
+                .name = "mpe_ipred",
+                .swgroup = TEGRA_SWGROUP_MPE,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 26,
+                },
+                .la = {
+                        .reg = 0x328,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x80,
+                },
+        }, {
+                .id = 0x1b,
+                .name = "mpeamemrd",
+                .swgroup = TEGRA_SWGROUP_MPE,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 27,
+                },
+                .la = {
+                        .reg = 0x32c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x42,
+                },
+        }, {
+                .id = 0x1c,
+                .name = "mpecsrd",
+                .swgroup = TEGRA_SWGROUP_MPE,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 28,
+                },
+                .la = {
+                        .reg = 0x32c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x1d,
+                .name = "ppcsahbdmar",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 29,
+                },
+                .la = {
+                        .reg = 0x344,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x1e,
+                .name = "ppcsahbslvr",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 30,
+                },
+                .la = {
+                        .reg = 0x344,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x12,
+                },
+        }, {
+                .id = 0x1f,
+                .name = "satar",
+                .swgroup = TEGRA_SWGROUP_SATA,
+                .smmu = {
+                        .reg = 0x228,
+                        .bit = 31,
+                },
+                .la = {
+                        .reg = 0x350,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x33,
+                },
+        }, {
+                .id = 0x20,
+                .name = "texsrd",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 0,
+                },
+                .la = {
+                        .reg = 0x338,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x13,
+                },
+        }, {
+                .id = 0x21,
+                .name = "texsrd2",
+                .swgroup = TEGRA_SWGROUP_NV2,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x340,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x13,
+                },
+        }, {
+                .id = 0x22,
+                .name = "vdebsevr",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 2,
+                },
+                .la = {
+                        .reg = 0x354,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x23,
+                .name = "vdember",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 3,
+                },
+                .la = {
+                        .reg = 0x354,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xd0,
+                },
+        }, {
+                .id = 0x24,
+                .name = "vdemcer",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 4,
+                },
+                .la = {
+                        .reg = 0x358,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x2a,
+                },
+        }, {
+                .id = 0x25,
+                .name = "vdetper",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 5,
+                },
+                .la = {
+                        .reg = 0x358,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x74,
+                },
+        }, {
+                .id = 0x26,
+                .name = "mpcorelpr",
+                .swgroup = TEGRA_SWGROUP_MPCORELP,
+                .la = {
+                        .reg = 0x324,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x27,
+                .name = "mpcorer",
+                .swgroup = TEGRA_SWGROUP_MPCORE,
+                .la = {
+                        .reg = 0x320,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x04,
+                },
+        }, {
+                .id = 0x28,
+                .name = "eppu",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 8,
+                },
+                .la = {
+                        .reg = 0x300,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x6c,
+                },
+        }, {
+                .id = 0x29,
+                .name = "eppv",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 9,
+                },
+                .la = {
+                        .reg = 0x304,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x6c,
+                },
+        }, {
+                .id = 0x2a,
+                .name = "eppy",
+                .swgroup = TEGRA_SWGROUP_EPP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 10,
+                },
+                .la = {
+                        .reg = 0x304,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x6c,
+                },
+        }, {
+                .id = 0x2b,
+                .name = "mpeunifbw",
+                .swgroup = TEGRA_SWGROUP_MPE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 11,
+                },
+                .la = {
+                        .reg = 0x330,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x13,
+                },
+        }, {
+                .id = 0x2c,
+                .name = "viwsb",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 12,
+                },
+                .la = {
+                        .reg = 0x364,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x12,
+                },
+        }, {
+                .id = 0x2d,
+                .name = "viwu",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 13,
+                },
+                .la = {
+                        .reg = 0x368,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xb2,
+                },
+        }, {
+                .id = 0x2e,
+                .name = "viwv",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 14,
+                },
+                .la = {
+                        .reg = 0x368,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xb2,
+                },
+        }, {
+                .id = 0x2f,
+                .name = "viwy",
+                .swgroup = TEGRA_SWGROUP_VI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 15,
+                },
+                .la = {
+                        .reg = 0x36c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x12,
+                },
+        }, {
+                .id = 0x30,
+                .name = "g2dw",
+                .swgroup = TEGRA_SWGROUP_G2,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 16,
+                },
+                .la = {
+                        .reg = 0x30c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x9,
+                },
+        }, {
+                .id = 0x31,
+                .name = "afiw",
+                .swgroup = TEGRA_SWGROUP_AFI,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 17,
+                },
+                .la = {
+                        .reg = 0x2e0,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0c,
+                },
+        }, {
+                .id = 0x32,
+                .name = "avpcarm7w",
+                .swgroup = TEGRA_SWGROUP_AVPC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 18,
+                },
+                .la = {
+                        .reg = 0x2e4,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0e,
+                },
+        }, {
+                .id = 0x33,
+                .name = "fdcdwr",
+                .swgroup = TEGRA_SWGROUP_NV,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 19,
+                },
+                .la = {
+                        .reg = 0x338,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0a,
+                },
+        }, {
+                .id = 0x34,
+                .name = "fdcwr2",
+                .swgroup = TEGRA_SWGROUP_NV2,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 20,
+                },
+                .la = {
+                        .reg = 0x340,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0a,
+                },
+        }, {
+                .id = 0x35,
+                .name = "hdaw",
+                .swgroup = TEGRA_SWGROUP_HDA,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 21,
+                },
+                .la = {
+                        .reg = 0x318,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x36,
+                .name = "host1xw",
+                .swgroup = TEGRA_SWGROUP_HC,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 22,
+                },
+                .la = {
+                        .reg = 0x314,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x37,
+                .name = "ispw",
+                .swgroup = TEGRA_SWGROUP_ISP,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 23,
+                },
+                .la = {
+                        .reg = 0x31c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x38,
+                .name = "mpcorelpw",
+                .swgroup = TEGRA_SWGROUP_MPCORELP,
+                .la = {
+                        .reg = 0x324,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0e,
+                },
+        }, {
+                .id = 0x39,
+                .name = "mpcorew",
+                .swgroup = TEGRA_SWGROUP_MPCORE,
+                .la = {
+                        .reg = 0x320,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x0e,
+                },
+        }, {
+                .id = 0x3a,
+                .name = "mpecswr",
+                .swgroup = TEGRA_SWGROUP_MPE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 26,
+                },
+                .la = {
+                        .reg = 0x330,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x3b,
+                .name = "ppcsahbdmaw",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 27,
+                },
+                .la = {
+                        .reg = 0x348,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x10,
+                },
+        }, {
+                .id = 0x3c,
+                .name = "ppcsahbslvw",
+                .swgroup = TEGRA_SWGROUP_PPCS,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 28,
+                },
+                .la = {
+                        .reg = 0x348,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x06,
+                },
+        }, {
+                .id = 0x3d,
+                .name = "sataw",
+                .swgroup = TEGRA_SWGROUP_SATA,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 29,
+                },
+                .la = {
+                        .reg = 0x350,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x33,
+                },
+        }, {
+                .id = 0x3e,
+                .name = "vdebsevw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 30,
+                },
+                .la = {
+                        .reg = 0x35c,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x3f,
+                .name = "vdedbgw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x22c,
+                        .bit = 31,
+                },
+                .la = {
+                        .reg = 0x35c,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0xff,
+                },
+        }, {
+                .id = 0x40,
+                .name = "vdembew",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 0,
+                },
+                .la = {
+                        .reg = 0x360,
+                        .shift = 0,
+                        .mask = 0xff,
+                        .def = 0x42,
+                },
+        }, {
+                .id = 0x41,
+                .name = "vdetpmw",
+                .swgroup = TEGRA_SWGROUP_VDE,
+                .smmu = {
+                        .reg = 0x230,
+                        .bit = 1,
+                },
+                .la = {
+                        .reg = 0x360,
+                        .shift = 16,
+                        .mask = 0xff,
+                        .def = 0x2a,
+                },
+        },
+};
+static const struct tegra_smmu_swgroup tegra30_swgroups[] = {
+        { .swgroup = TEGRA_SWGROUP_DC,   .reg = 0x240 },
+        { .swgroup = TEGRA_SWGROUP_DCB,  .reg = 0x244 },
+        { .swgroup = TEGRA_SWGROUP_EPP,  .reg = 0x248 },
+        { .swgroup = TEGRA_SWGROUP_G2,   .reg = 0x24c },
+        { .swgroup = TEGRA_SWGROUP_MPE,  .reg = 0x264 },
+        { .swgroup = TEGRA_SWGROUP_VI,   .reg = 0x280 },
+        { .swgroup = TEGRA_SWGROUP_AFI,  .reg = 0x238 },
+        { .swgroup = TEGRA_SWGROUP_AVPC, .reg = 0x23c },
+        { .swgroup = TEGRA_SWGROUP_NV,   .reg = 0x268 },
+        { .swgroup = TEGRA_SWGROUP_NV2,  .reg = 0x26c },
+        { .swgroup = TEGRA_SWGROUP_HDA,  .reg = 0x254 },
+        { .swgroup = TEGRA_SWGROUP_HC,   .reg = 0x250 },
+        { .swgroup = TEGRA_SWGROUP_PPCS, .reg = 0x270 },
+        { .swgroup = TEGRA_SWGROUP_SATA, .reg = 0x278 },
+        { .swgroup = TEGRA_SWGROUP_VDE,  .reg = 0x27c },
+        { .swgroup = TEGRA_SWGROUP_ISP,  .reg = 0x258 },
+};
+static void tegra30_flush_dcache(struct page *page, unsigned long offset,
+                                 size_t size)
+{
+        phys_addr_t phys = page_to_phys(page) + offset;
+        void *virt = page_address(page) + offset;
+        __cpuc_flush_dcache_area(virt, size);
+        outer_flush_range(phys, phys + size);
+}
+static const struct tegra_smmu_ops tegra30_smmu_ops = {
+        .flush_dcache = tegra30_flush_dcache,
+};
+static const struct tegra_smmu_soc tegra30_smmu_soc = {
+        .clients = tegra30_mc_clients,
+        .num_clients = ARRAY_SIZE(tegra30_mc_clients),
+        .swgroups = tegra30_swgroups,
+        .num_swgroups = ARRAY_SIZE(tegra30_swgroups),
+        .supports_round_robin_arbitration = false,
+        .supports_request_limit = false,
+        .num_asids = 4,
+        .ops = &tegra30_smmu_ops,
+};
+const struct tegra_mc_soc tegra30_mc_soc = {
+        .clients = tegra30_mc_clients,
+        .num_clients = ARRAY_SIZE(tegra30_mc_clients),
+        .num_address_bits = 32,
+        .atom_size = 16,
+        .smmu = &tegra30_smmu_soc,
+};
diff --git a/drivers/memory/tegra30-mc.c b/drivers/memory/tegra30-mc.c
deleted file mode 100644
index ef7934535fd1..000000000000
--- a/drivers/memory/tegra30-mc.c
+++ /dev/null
@@ -1,378 +0,0 @@
-/*
- * Tegra30 Memory Controller
- *
- * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/ratelimit.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#define DRV_NAME "tegra30-mc"
-#define MC_INTSTATUS                    0x0
-#define MC_INTMASK                      0x4
-#define MC_INT_ERR_SHIFT                6
-#define MC_INT_ERR_MASK                 (0x1f << MC_INT_ERR_SHIFT)
-#define MC_INT_DECERR_EMEM              BIT(MC_INT_ERR_SHIFT)
-#define MC_INT_SECURITY_VIOLATION       BIT(MC_INT_ERR_SHIFT + 2)
-#define MC_INT_ARBITRATION_EMEM         BIT(MC_INT_ERR_SHIFT + 3)
-#define MC_INT_INVALID_SMMU_PAGE        BIT(MC_INT_ERR_SHIFT + 4)
-#define MC_ERR_STATUS                   0x8
-#define MC_ERR_ADR                      0xc
-#define MC_ERR_TYPE_SHIFT               28
-#define MC_ERR_TYPE_MASK                (7 << MC_ERR_TYPE_SHIFT)
-#define MC_ERR_TYPE_DECERR_EMEM         2
-#define MC_ERR_TYPE_SECURITY_TRUSTZONE  3
-#define MC_ERR_TYPE_SECURITY_CARVEOUT   4
-#define MC_ERR_TYPE_INVALID_SMMU_PAGE   6
-#define MC_ERR_INVALID_SMMU_PAGE_SHIFT  25
-#define MC_ERR_INVALID_SMMU_PAGE_MASK   (7 << MC_ERR_INVALID_SMMU_PAGE_SHIFT)
-#define MC_ERR_RW_SHIFT                 16
-#define MC_ERR_RW                       BIT(MC_ERR_RW_SHIFT)
-#define MC_ERR_SECURITY                 BIT(MC_ERR_RW_SHIFT + 1)
-#define SECURITY_VIOLATION_TYPE         BIT(30) /* 0=TRUSTZONE, 1=CARVEOUT */
-#define MC_EMEM_ARB_CFG                 0x90
-#define MC_EMEM_ARB_OUTSTANDING_REQ     0x94
-#define MC_EMEM_ARB_TIMING_RCD          0x98
-#define MC_EMEM_ARB_TIMING_RP           0x9c
-#define MC_EMEM_ARB_TIMING_RC           0xa0
-#define MC_EMEM_ARB_TIMING_RAS          0xa4
-#define MC_EMEM_ARB_TIMING_FAW          0xa8
-#define MC_EMEM_ARB_TIMING_RRD          0xac
-#define MC_EMEM_ARB_TIMING_RAP2PRE      0xb0
-#define MC_EMEM_ARB_TIMING_WAP2PRE      0xb4
-#define MC_EMEM_ARB_TIMING_R2R          0xb8
-#define MC_EMEM_ARB_TIMING_W2W          0xbc
-#define MC_EMEM_ARB_TIMING_R2W          0xc0
-#define MC_EMEM_ARB_TIMING_W2R          0xc4
-#define MC_EMEM_ARB_DA_TURNS            0xd0
-#define MC_EMEM_ARB_DA_COVERS           0xd4
-#define MC_EMEM_ARB_MISC0               0xd8
-#define MC_EMEM_ARB_MISC1               0xdc
-#define MC_EMEM_ARB_RING3_THROTTLE      0xe4
-#define MC_EMEM_ARB_OVERRIDE            0xe8
-#define MC_TIMING_CONTROL               0xfc
-#define MC_CLIENT_ID_MASK               0x7f
-#define NUM_MC_REG_BANKS                4
-struct tegra30_mc {
-        void __iomem *regs[NUM_MC_REG_BANKS];
-        struct device *dev;
-        u32 ctx[0];
-};
-static inline u32 mc_readl(struct tegra30_mc *mc, u32 offs)
-{
-        u32 val = 0;
-        if (offs < 0x10)
-                val = readl(mc->regs[0] + offs);
-        else if (offs < 0x1f0)
-                val = readl(mc->regs[1] + offs - 0x3c);
-        else if (offs < 0x228)
-                val = readl(mc->regs[2] + offs - 0x200);
-        else if (offs < 0x400)
-                val = readl(mc->regs[3] + offs - 0x284);
-        return val;
-}
-static inline void mc_writel(struct tegra30_mc *mc, u32 val, u32 offs)
-{
-        if (offs < 0x10)
-                writel(val, mc->regs[0] + offs);
-        else if (offs < 0x1f0)
-                writel(val, mc->regs[1] + offs - 0x3c);
-        else if (offs < 0x228)
-                writel(val, mc->regs[2] + offs - 0x200);
-        else if (offs < 0x400)
-                writel(val, mc->regs[3] + offs - 0x284);
-}
-static const char * const tegra30_mc_client[] = {
-        "csr_ptcr",
-        "cbr_display0a",
-        "cbr_display0ab",
-        "cbr_display0b",
-        "cbr_display0bb",
-        "cbr_display0c",
-        "cbr_display0cb",
-        "cbr_display1b",
-        "cbr_display1bb",
-        "cbr_eppup",
-        "cbr_g2pr",
-        "cbr_g2sr",
-        "cbr_mpeunifbr",
-        "cbr_viruv",
-        "csr_afir",
-        "csr_avpcarm7r",
-        "csr_displayhc",
-        "csr_displayhcb",
-        "csr_fdcdrd",
-        "csr_fdcdrd2",
-        "csr_g2dr",
-        "csr_hdar",
-        "csr_host1xdmar",
-        "csr_host1xr",
-        "csr_idxsrd",
-        "csr_idxsrd2",
-        "csr_mpe_ipred",
-        "csr_mpeamemrd",
-        "csr_mpecsrd",
-        "csr_ppcsahbdmar",
-        "csr_ppcsahbslvr",
-        "csr_satar",
-        "csr_texsrd",
-        "csr_texsrd2",
-        "csr_vdebsevr",
-        "csr_vdember",
-        "csr_vdemcer",
-        "csr_vdetper",
-        "csr_mpcorelpr",
-        "csr_mpcorer",
-        "cbw_eppu",
-        "cbw_eppv",
-        "cbw_eppy",
-        "cbw_mpeunifbw",
-        "cbw_viwsb",
-        "cbw_viwu",
-        "cbw_viwv",
-        "cbw_viwy",
-        "ccw_g2dw",
-        "csw_afiw",
-        "csw_avpcarm7w",
-        "csw_fdcdwr",
-        "csw_fdcdwr2",
-        "csw_hdaw",
-        "csw_host1xw",
-        "csw_ispw",
-        "csw_mpcorelpw",
-        "csw_mpcorew",
-        "csw_mpecswr",
-        "csw_ppcsahbdmaw",
-        "csw_ppcsahbslvw",
-        "csw_sataw",
-        "csw_vdebsevw",
-        "csw_vdedbgw",
-        "csw_vdembew",
-        "csw_vdetpmw",
-};
-static void tegra30_mc_decode(struct tegra30_mc *mc, int n)
-{
-        u32 err, addr;
-        const char * const mc_int_err[] = {
-                "MC_DECERR",
-                "Unknown",
-                "MC_SECURITY_ERR",
-                "MC_ARBITRATION_EMEM",
-                "MC_SMMU_ERR",
-        };
-        const char * const err_type[] = {
-                "Unknown",
-                "Unknown",
-                "DECERR_EMEM",
-                "SECURITY_TRUSTZONE",
-                "SECURITY_CARVEOUT",
-                "Unknown",
-                "INVALID_SMMU_PAGE",
-                "Unknown",
-        };
-        char attr[6];
-        int cid, perm, type, idx;
-        const char *client = "Unknown";
-        idx = n - MC_INT_ERR_SHIFT;
-        if ((idx < 0) || (idx >= ARRAY_SIZE(mc_int_err)) || (idx == 1)) {
-                dev_err_ratelimited(mc->dev, "Unknown interrupt status %08lx\n",
-                                    BIT(n));
-                return;
-        }
-        err = mc_readl(mc, MC_ERR_STATUS);
-        type = (err & MC_ERR_TYPE_MASK) >> MC_ERR_TYPE_SHIFT;
-        perm = (err & MC_ERR_INVALID_SMMU_PAGE_MASK) >>
-                MC_ERR_INVALID_SMMU_PAGE_SHIFT;
-        if (type == MC_ERR_TYPE_INVALID_SMMU_PAGE)
-                sprintf(attr, "%c-%c-%c",
-                        (perm & BIT(2)) ? 'R' : '-',
-                        (perm & BIT(1)) ? 'W' : '-',
-                        (perm & BIT(0)) ? 'S' : '-');
-        else
-                attr[0] = '\0';
-        cid = err & MC_CLIENT_ID_MASK;
-        if (cid < ARRAY_SIZE(tegra30_mc_client))
-                client = tegra30_mc_client[cid];
-        addr = mc_readl(mc, MC_ERR_ADR);
-        dev_err_ratelimited(mc->dev, "%s (0x%08x): 0x%08x %s (%s %s %s %s)\n",
-                           mc_int_err[idx], err, addr, client,
-                           (err & MC_ERR_SECURITY) ? "secure" : "non-secure",
-                           (err & MC_ERR_RW) ? "write" : "read",
-                           err_type[type], attr);
-}
-static const u32 tegra30_mc_ctx[] = {
-        MC_EMEM_ARB_CFG,
-        MC_EMEM_ARB_OUTSTANDING_REQ,
-        MC_EMEM_ARB_TIMING_RCD,
-        MC_EMEM_ARB_TIMING_RP,
-        MC_EMEM_ARB_TIMING_RC,
-        MC_EMEM_ARB_TIMING_RAS,
-        MC_EMEM_ARB_TIMING_FAW,
-        MC_EMEM_ARB_TIMING_RRD,
-        MC_EMEM_ARB_TIMING_RAP2PRE,
-        MC_EMEM_ARB_TIMING_WAP2PRE,
-        MC_EMEM_ARB_TIMING_R2R,
-        MC_EMEM_ARB_TIMING_W2W,
-        MC_EMEM_ARB_TIMING_R2W,
-        MC_EMEM_ARB_TIMING_W2R,
-        MC_EMEM_ARB_DA_TURNS,
-        MC_EMEM_ARB_DA_COVERS,
-        MC_EMEM_ARB_MISC0,
-        MC_EMEM_ARB_MISC1,
-        MC_EMEM_ARB_RING3_THROTTLE,
-        MC_EMEM_ARB_OVERRIDE,
-        MC_INTMASK,
-};
-#ifdef CONFIG_PM
-static int tegra30_mc_suspend(struct device *dev)
-{
-        int i;
-        struct tegra30_mc *mc = dev_get_drvdata(dev);
-        for (i = 0; i < ARRAY_SIZE(tegra30_mc_ctx); i++)
-                mc->ctx[i] = mc_readl(mc, tegra30_mc_ctx[i]);
-        return 0;
-}
-static int tegra30_mc_resume(struct device *dev)
-{
-        int i;
-        struct tegra30_mc *mc = dev_get_drvdata(dev);
-        for (i = 0; i < ARRAY_SIZE(tegra30_mc_ctx); i++)
-                mc_writel(mc, mc->ctx[i], tegra30_mc_ctx[i]);
-        mc_writel(mc, 1, MC_TIMING_CONTROL);
-        /* Read-back to ensure that write reached */
-        mc_readl(mc, MC_TIMING_CONTROL);
-        return 0;
-}
-#endif
-static UNIVERSAL_DEV_PM_OPS(tegra30_mc_pm,
-                            tegra30_mc_suspend,
-                            tegra30_mc_resume, NULL);
-static const struct of_device_id tegra30_mc_of_match[] = {
-        { .compatible = "nvidia,tegra30-mc", },
-        {},
-};
-static irqreturn_t tegra30_mc_isr(int irq, void *data)
-{
-        u32 stat, mask, bit;
-        struct tegra30_mc *mc = data;
-        stat = mc_readl(mc, MC_INTSTATUS);
-        mask = mc_readl(mc, MC_INTMASK);
-        mask &= stat;
-        if (!mask)
-                return IRQ_NONE;
-        while ((bit = ffs(mask)) != 0) {
-                tegra30_mc_decode(mc, bit - 1);
-                mask &= ~BIT(bit - 1);
-        }
-        mc_writel(mc, stat, MC_INTSTATUS);
-        return IRQ_HANDLED;
-}
-static int tegra30_mc_probe(struct platform_device *pdev)
-{
-        struct resource *irq;
-        struct tegra30_mc *mc;
-        size_t bytes;
-        int err, i;
-        u32 intmask;
-        bytes = sizeof(*mc) + sizeof(u32) * ARRAY_SIZE(tegra30_mc_ctx);
-        mc = devm_kzalloc(&pdev->dev, bytes, GFP_KERNEL);
-        if (!mc)
-                return -ENOMEM;
-        mc->dev = &pdev->dev;
-        for (i = 0; i < ARRAY_SIZE(mc->regs); i++) {
-                struct resource *res;
-                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
-                mc->regs[i] = devm_ioremap_resource(&pdev->dev, res);
-                if (IS_ERR(mc->regs[i]))
-                        return PTR_ERR(mc->regs[i]);
-        }
-        irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-        if (!irq)
-                return -ENODEV;
-        err = devm_request_irq(&pdev->dev, irq->start, tegra30_mc_isr,
-                               IRQF_SHARED, dev_name(&pdev->dev), mc);
-        if (err)
-                return -ENODEV;
-        platform_set_drvdata(pdev, mc);
-        intmask = MC_INT_INVALID_SMMU_PAGE |
-                MC_INT_DECERR_EMEM | MC_INT_SECURITY_VIOLATION;
-        mc_writel(mc, intmask, MC_INTMASK);
-        return 0;
-}
-static struct platform_driver tegra30_mc_driver = {
-        .probe = tegra30_mc_probe,
-        .driver = {
-                .name = DRV_NAME,
-                .owner = THIS_MODULE,
-                .of_match_table = tegra30_mc_of_match,
-                .pm = &tegra30_mc_pm,
-        },
-};
-module_platform_driver(tegra30_mc_driver);
-MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>");
-MODULE_DESCRIPTION("Tegra30 MC driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 60fed3d7820b..157d421f755b 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_RESET_CONTROLLER) += core.o
 obj-$(CONFIG_ARCH_SOCFPGA) += reset-socfpga.o
+obj-$(CONFIG_ARCH_BERLIN) += reset-berlin.o
 obj-$(CONFIG_ARCH_SUNXI) += reset-sunxi.o
 obj-$(CONFIG_ARCH_STI) += sti/
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index baeaf82d40d9..7955e00d04d4 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -126,6 +126,21 @@ int reset_control_deassert(struct reset_control *rstc)
 EXPORT_SYMBOL_GPL(reset_control_deassert);
 /**
+ * reset_control_status - returns a negative errno if not supported, a
+ * positive value if the reset line is asserted, or zero if the reset
+ * line is not asserted.
+ * @rstc: reset controller
+ */
+int reset_control_status(struct reset_control *rstc)
+{
+        if (rstc->rcdev->ops->status)
+                return rstc->rcdev->ops->status(rstc->rcdev, rstc->id);
+        return -ENOSYS;
+}
+EXPORT_SYMBOL_GPL(reset_control_status);
+/**
 * of_reset_control_get - Lookup and obtain a reference to a reset controller.
 * @node: device to be reset by the controller
 * @id: reset line name
diff --git a/drivers/reset/reset-berlin.c b/drivers/reset/reset-berlin.c
new file mode 100644
index 000000000000..f8b48a13cf0b
--- /dev/null
+++ b/drivers/reset/reset-berlin.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2014 Marvell Technology Group Ltd.
+ *
+ * Antoine Tenart <antoine.tenart@free-electrons.com>
+ * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#define BERLIN_MAX_RESETS       32
+#define to_berlin_reset_priv(p)         \
+        container_of((p), struct berlin_reset_priv, rcdev)
+struct berlin_reset_priv {
+        void __iomem                    *base;
+        unsigned int                    size;
+        struct reset_controller_dev     rcdev;
+};
+static int berlin_reset_reset(struct reset_controller_dev *rcdev,
+                              unsigned long id)
+{
+        struct berlin_reset_priv *priv = to_berlin_reset_priv(rcdev);
+        int offset = id >> 8;
+        int mask = BIT(id & 0x1f);
+        writel(mask, priv->base + offset);
+        /* let the reset be effective */
+        udelay(10);
+        return 0;
+}
+static struct reset_control_ops berlin_reset_ops = {
+        .reset  = berlin_reset_reset,
+};
+static int berlin_reset_xlate(struct reset_controller_dev *rcdev,
+                              const struct of_phandle_args *reset_spec)
+{
+        struct berlin_reset_priv *priv = to_berlin_reset_priv(rcdev);
+        unsigned offset, bit;
+        if (WARN_ON(reset_spec->args_count != rcdev->of_reset_n_cells))
+                return -EINVAL;
+        offset = reset_spec->args[0];
+        bit = reset_spec->args[1];
+        if (offset >= priv->size)
+                return -EINVAL;
+        if (bit >= BERLIN_MAX_RESETS)
+                return -EINVAL;
+        return (offset << 8) | bit;
+}
+static int __berlin_reset_init(struct device_node *np)
+{
+        struct berlin_reset_priv *priv;
+        struct resource res;
+        resource_size_t size;
+        int ret;
+        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+        if (!priv)
+                return -ENOMEM;
+        ret = of_address_to_resource(np, 0, &res);
+        if (ret)
+                goto err;
+        size = resource_size(&res);
+        priv->base = ioremap(res.start, size);
+        if (!priv->base) {
+                ret = -ENOMEM;
+                goto err;
+        }
+        priv->size = size;
+        priv->rcdev.owner = THIS_MODULE;
+        priv->rcdev.ops = &berlin_reset_ops;
+        priv->rcdev.of_node = np;
+        priv->rcdev.of_reset_n_cells = 2;
+        priv->rcdev.of_xlate = berlin_reset_xlate;
+        reset_controller_register(&priv->rcdev);
+        return 0;
+err:
+        kfree(priv);
+        return ret;
+}
+static const struct of_device_id berlin_reset_of_match[] __initconst = {
+        { .compatible = "marvell,berlin2-chip-ctrl" },
+        { .compatible = "marvell,berlin2cd-chip-ctrl" },
+        { .compatible = "marvell,berlin2q-chip-ctrl" },
+        { },
+};
+static int __init berlin_reset_init(void)
+{
+        struct device_node *np;
+        int ret;
+        for_each_matching_node(np, berlin_reset_of_match) {
+                ret = __berlin_reset_init(np);
+                if (ret)
+                        return ret;
+        }
+        return 0;
+}
+arch_initcall(berlin_reset_init);
diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c
index 79c32ca84ef1..40582089474a 100644
--- a/drivers/reset/reset-socfpga.c
+++ b/drivers/reset/reset-socfpga.c
@@ -76,9 +76,24 @@ static int socfpga_reset_deassert(struct reset_controller_dev *rcdev,
        return 0;
 }
+static int socfpga_reset_status(struct reset_controller_dev *rcdev,
+                                unsigned long id)
+{
+        struct socfpga_reset_data *data = container_of(rcdev,
+                                                struct socfpga_reset_data, rcdev);
+        int bank = id / BITS_PER_LONG;
+        int offset = id % BITS_PER_LONG;
+        u32 reg;
+        reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS));
+        return !(reg & BIT(offset));
+}
 static struct reset_control_ops socfpga_reset_ops = {
        .assert         = socfpga_reset_assert,
        .deassert       = socfpga_reset_deassert,
+        .status         = socfpga_reset_status,
 };
 static int socfpga_reset_probe(struct platform_device *pdev)
diff --git a/drivers/reset/sti/Kconfig b/drivers/reset/sti/Kconfig
index 88d2d0316613..f8c15a37fb35 100644
--- a/drivers/reset/sti/Kconfig
+++ b/drivers/reset/sti/Kconfig
@@ -12,4 +12,8 @@ config STIH416_RESET
        bool
        select STI_RESET_SYSCFG
+config STIH407_RESET
+        bool
+        select STI_RESET_SYSCFG
 endif
diff --git a/drivers/reset/sti/Makefile b/drivers/reset/sti/Makefile
index be1c97647871..dc85dfbe56a9 100644
--- a/drivers/reset/sti/Makefile
+++ b/drivers/reset/sti/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_STI_RESET_SYSCFG) += reset-syscfg.o
 obj-$(CONFIG_STIH415_RESET) += reset-stih415.o
 obj-$(CONFIG_STIH416_RESET) += reset-stih416.o
+obj-$(CONFIG_STIH407_RESET) += reset-stih407.o
diff --git a/drivers/reset/sti/reset-stih407.c b/drivers/reset/sti/reset-stih407.c
new file mode 100644
index 000000000000..d83db5d72d08
--- /dev/null
+++ b/drivers/reset/sti/reset-stih407.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2014 STMicroelectronics (R&D) Limited
+ * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/reset-controller/stih407-resets.h>
+#include "reset-syscfg.h"
+/* STiH407 Peripheral powerdown definitions. */
+static const char stih407_core[] = "st,stih407-core-syscfg";
+static const char stih407_sbc_reg[] = "st,stih407-sbc-reg-syscfg";
+static const char stih407_lpm[] = "st,stih407-lpm-syscfg";
+#define STIH407_PDN_0(_bit) \
+        _SYSCFG_RST_CH(stih407_core, SYSCFG_5000, _bit, SYSSTAT_5500, _bit)
+#define STIH407_PDN_1(_bit) \
+        _SYSCFG_RST_CH(stih407_core, SYSCFG_5001, _bit, SYSSTAT_5501, _bit)
+#define STIH407_PDN_ETH(_bit, _stat) \
+        _SYSCFG_RST_CH(stih407_sbc_reg, SYSCFG_4032, _bit, SYSSTAT_4520, _stat)
+/* Powerdown requests control 0 */
+#define SYSCFG_5000     0x0
+#define SYSSTAT_5500    0x7d0
+/* Powerdown requests control 1 (High Speed Links) */
+#define SYSCFG_5001     0x4
+#define SYSSTAT_5501    0x7d4
+/* Ethernet powerdown/status/reset */
+#define SYSCFG_4032     0x80
+#define SYSSTAT_4520    0x820
+#define SYSCFG_4002     0x8
+static const struct syscfg_reset_channel_data stih407_powerdowns[] = {
+        [STIH407_EMISS_POWERDOWN] = STIH407_PDN_0(1),
+        [STIH407_NAND_POWERDOWN] = STIH407_PDN_0(0),
+        [STIH407_USB3_POWERDOWN] = STIH407_PDN_1(6),
+        [STIH407_USB2_PORT1_POWERDOWN] = STIH407_PDN_1(5),
+        [STIH407_USB2_PORT0_POWERDOWN] = STIH407_PDN_1(4),
+        [STIH407_PCIE1_POWERDOWN] = STIH407_PDN_1(3),
+        [STIH407_PCIE0_POWERDOWN] = STIH407_PDN_1(2),
+        [STIH407_SATA1_POWERDOWN] = STIH407_PDN_1(1),
+        [STIH407_SATA0_POWERDOWN] = STIH407_PDN_1(0),
+        [STIH407_ETH1_POWERDOWN] = STIH407_PDN_ETH(0, 2),
+};
+/* Reset Generator control 0/1 */
+#define SYSCFG_5131     0x20c
+#define SYSCFG_5132     0x210
+#define LPM_SYSCFG_1    0x4     /* Softreset IRB & SBC UART */
+#define STIH407_SRST_CORE(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih407_core, _reg, _bit)
+#define STIH407_SRST_SBC(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih407_sbc_reg, _reg, _bit)
+#define STIH407_SRST_LPM(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih407_lpm, _reg, _bit)
+static const struct syscfg_reset_channel_data stih407_softresets[] = {
+        [STIH407_ETH1_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 4),
+        [STIH407_MMC1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 3),
+        [STIH407_USB2_PORT0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 28),
+        [STIH407_USB2_PORT1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 29),
+        [STIH407_PICOPHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 30),
+        [STIH407_IRB_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 6),
+        [STIH407_PCIE0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 6),
+        [STIH407_PCIE1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 15),
+        [STIH407_SATA0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 7),
+        [STIH407_SATA1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 16),
+        [STIH407_MIPHY0_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 4),
+        [STIH407_MIPHY1_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 13),
+        [STIH407_MIPHY2_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 22),
+        [STIH407_SATA0_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 5),
+        [STIH407_SATA1_PWR_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 14),
+        [STIH407_DELTA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 3),
+        [STIH407_BLITTER_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 10),
+        [STIH407_HDTVOUT_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 11),
+        [STIH407_HDQVDP_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 12),
+        [STIH407_VDP_AUX_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 14),
+        [STIH407_COMPO_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 15),
+        [STIH407_HDMI_TX_PHY_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 21),
+        [STIH407_JPEG_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 23),
+        [STIH407_VP8_DEC_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 24),
+        [STIH407_GPU_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5131, 30),
+        [STIH407_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 0),
+        [STIH407_ERAM_HVA_SOFTRESET] = STIH407_SRST_CORE(SYSCFG_5132, 1),
+        [STIH407_LPM_SOFTRESET] = STIH407_SRST_SBC(SYSCFG_4002, 2),
+        [STIH407_KEYSCAN_SOFTRESET] = STIH407_SRST_LPM(LPM_SYSCFG_1, 8),
+};
+/* PicoPHY reset/control */
+#define SYSCFG_5061     0x0f4
+static const struct syscfg_reset_channel_data stih407_picophyresets[] = {
+        [STIH407_PICOPHY0_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 5),
+        [STIH407_PICOPHY1_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 6),
+        [STIH407_PICOPHY2_RESET] = STIH407_SRST_CORE(SYSCFG_5061, 7),
+};
+static const struct syscfg_reset_controller_data stih407_powerdown_controller = {
+        .wait_for_ack = true,
+        .nr_channels = ARRAY_SIZE(stih407_powerdowns),
+        .channels = stih407_powerdowns,
+};
+static const struct syscfg_reset_controller_data stih407_softreset_controller = {
+        .wait_for_ack = false,
+        .active_low = true,
+        .nr_channels = ARRAY_SIZE(stih407_softresets),
+        .channels = stih407_softresets,
+};
+static const struct syscfg_reset_controller_data stih407_picophyreset_controller = {
+        .wait_for_ack = false,
+        .nr_channels = ARRAY_SIZE(stih407_picophyresets),
+        .channels = stih407_picophyresets,
+};
+static struct of_device_id stih407_reset_match[] = {
+        {
+                .compatible = "st,stih407-powerdown",
+                .data = &stih407_powerdown_controller,
+        },
+        {
+                .compatible = "st,stih407-softreset",
+                .data = &stih407_softreset_controller,
+        },
+        {
+                .compatible = "st,stih407-picophyreset",
+                .data = &stih407_picophyreset_controller,
+        },
+        { /* sentinel */ },
+};
+static struct platform_driver stih407_reset_driver = {
+        .probe = syscfg_reset_probe,
+        .driver = {
+                .name = "reset-stih407",
+                .of_match_table = stih407_reset_match,
+        },
+};
+static int __init stih407_reset_init(void)
+{
+        return platform_driver_register(&stih407_reset_driver);
+}
+arch_initcall(stih407_reset_init);
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index da5a1c789f36..b682651b5307 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1109,16 +1109,18 @@ config RTC_DRV_AT91RM9200
          this is powered by the backup power supply.
 config RTC_DRV_AT91SAM9
-        tristate "AT91SAM9x/AT91CAP9 RTT as RTC"
+        tristate "AT91SAM9 RTT as RTC"
        depends on ARCH_AT91
+        select MFD_SYSCON
        help
-          RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
+          Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
-          (Real Time Timer). These timers are powered by the backup power
+          can be used as an RTC thanks to the backup power supply (e.g. a
-          supply (such as a small coin cell battery), but do not need to
+          small coin cell battery) which keeps this block and the GPBR
-          be used as RTCs.
+          (General Purpose Backup Registers) block powered when the device
+          is shutdown.
-          (On AT91SAM9rl and AT91SAM9G45 chips you probably want to use the
+          Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
-          dedicated RTC module and leave the RTT available for other uses.)
+          probably want to use the real RTC block instead of the "RTT as an
+          RTC" driver.
 config RTC_DRV_AT91SAM9_RTT
        int
@@ -1126,6 +1128,9 @@ config RTC_DRV_AT91SAM9_RTT
        default 0
        depends on RTC_DRV_AT91SAM9
        help
+          This option is only relevant for legacy board support and
+          won't be used when booting a DT board.
          More than one RTT module is available. You can choose which
          one will be used as an RTC. The default of zero is normally
          OK to use, though some systems use that for non-RTC purposes.
@@ -1137,6 +1142,9 @@ config RTC_DRV_AT91SAM9_GPBR
        prompt "Backup Register Number"
        depends on RTC_DRV_AT91SAM9
        help
+          This option is only relevant for legacy board support and
+          won't be used when booting a DT board.
          The RTC driver needs to use one of the General Purpose Backup
          Registers (GPBRs) as well as the RTT. You can choose which one
          will be used. The default of zero is normally OK to use, but
diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 596374304532..abac38abd38e 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -21,10 +21,9 @@
 #include <linux/slab.h>
 #include <linux/platform_data/atmel.h>
 #include <linux/io.h>
+#include <linux/mfd/syscon.h>
-#include <mach/at91_rtt.h>
+#include <linux/regmap.h>
-#include <mach/cpu.h>
+#include <linux/clk.h>
-#include <mach/hardware.h>
 /*
 * This driver uses two configurable hardware resources that live in the
@@ -47,6 +46,22 @@
 * registers available, likewise usable for more than "RTC" support.
 */
+#define AT91_RTT_MR             0x00                    /* Real-time Mode Register */
+#define AT91_RTT_RTPRES         (0xffff << 0)           /* Real-time Timer Prescaler Value */
+#define AT91_RTT_ALMIEN         (1 << 16)               /* Alarm Interrupt Enable */
+#define AT91_RTT_RTTINCIEN      (1 << 17)               /* Real Time Timer Increment Interrupt Enable */
+#define AT91_RTT_RTTRST         (1 << 18)               /* Real Time Timer Restart */
+#define AT91_RTT_AR             0x04                    /* Real-time Alarm Register */
+#define AT91_RTT_ALMV           (0xffffffff)            /* Alarm Value */
+#define AT91_RTT_VR             0x08                    /* Real-time Value Register */
+#define AT91_RTT_CRTV           (0xffffffff)            /* Current Real-time Value */
+#define AT91_RTT_SR             0x0c                    /* Real-time Status Register */
+#define AT91_RTT_ALMS           (1 << 0)                /* Real-time Alarm Status */
+#define AT91_RTT_RTTINC         (1 << 1)                /* Real-time Timer Increment */
 /*
 * We store ALARM_DISABLED in ALMV to record that no alarm is set.
 * It's also the reset value for that field.
@@ -58,19 +73,30 @@ struct sam9_rtc {
        void __iomem            *rtt;
        struct rtc_device       *rtcdev;
        u32                     imr;
-        void __iomem            *gpbr;
+        struct regmap           *gpbr;
+        unsigned int            gpbr_offset;
        int                     irq;
+        struct clk              *sclk;
 };
 #define rtt_readl(rtc, field) \
-        __raw_readl((rtc)->rtt + AT91_RTT_ ## field)
+        readl((rtc)->rtt + AT91_RTT_ ## field)
 #define rtt_writel(rtc, field, val) \
-        __raw_writel((val), (rtc)->rtt + AT91_RTT_ ## field)
+        writel((val), (rtc)->rtt + AT91_RTT_ ## field)
+static inline unsigned int gpbr_readl(struct sam9_rtc *rtc)
+{
+        unsigned int val;
+        regmap_read(rtc->gpbr, rtc->gpbr_offset, &val);
-#define gpbr_readl(rtc) \
+        return val;
-        __raw_readl((rtc)->gpbr)
+}
-#define gpbr_writel(rtc, val) \
-        __raw_writel((val), (rtc)->gpbr)
+static inline void gpbr_writel(struct sam9_rtc *rtc, unsigned int val)
+{
+        regmap_write(rtc->gpbr, rtc->gpbr_offset, val);
+}
 /*
 * Read current time and date in RTC
@@ -287,22 +313,22 @@ static const struct rtc_class_ops at91_rtc_ops = {
        .alarm_irq_enable = at91_rtc_alarm_irq_enable,
 };
+static struct regmap_config gpbr_regmap_config = {
+        .reg_bits = 32,
+        .val_bits = 32,
+        .reg_stride = 4,
+};
 /*
 * Initialize and install RTC driver
 */
 static int at91_rtc_probe(struct platform_device *pdev)
 {
-        struct resource *r, *r_gpbr;
+        struct resource *r;
        struct sam9_rtc *rtc;
        int             ret, irq;
        u32             mr;
+        unsigned int    sclk_rate;
-        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        r_gpbr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-        if (!r || !r_gpbr) {
-                dev_err(&pdev->dev, "need 2 ressources\n");
-                return -ENODEV;
-        }
        irq = platform_get_irq(pdev, 0);
        if (irq < 0) {
@@ -321,24 +347,66 @@ static int at91_rtc_probe(struct platform_device *pdev)
                device_init_wakeup(&pdev->dev, 1);
        platform_set_drvdata(pdev, rtc);
-        rtc->rtt = devm_ioremap(&pdev->dev, r->start, resource_size(r));
-        if (!rtc->rtt) {
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-                dev_err(&pdev->dev, "failed to map registers, aborting.\n");
+        rtc->rtt = devm_ioremap_resource(&pdev->dev, r);
-                return -ENOMEM;
+        if (IS_ERR(rtc->rtt))
+                return PTR_ERR(rtc->rtt);
+        if (!pdev->dev.of_node) {
+                /*
+                 * TODO: Remove this code chunk when removing non DT board
+                 * support. Remember to remove the gpbr_regmap_config
+                 * variable too.
+                 */
+                void __iomem *gpbr;
+                r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+                gpbr = devm_ioremap_resource(&pdev->dev, r);
+                if (IS_ERR(gpbr))
+                        return PTR_ERR(gpbr);
+                rtc->gpbr = regmap_init_mmio(NULL, gpbr,
+                                             &gpbr_regmap_config);
+        } else {
+                struct of_phandle_args args;
+                ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
+                                                "atmel,rtt-rtc-time-reg", 1, 0,
+                                                &args);
+                if (ret)
+                        return ret;
+                rtc->gpbr = syscon_node_to_regmap(args.np);
+                rtc->gpbr_offset = args.args[0];
        }
-        rtc->gpbr = devm_ioremap(&pdev->dev, r_gpbr->start,
+        if (IS_ERR(rtc->gpbr)) {
-                                resource_size(r_gpbr));
+                dev_err(&pdev->dev, "failed to retrieve gpbr regmap, aborting.\n");
-        if (!rtc->gpbr) {
-                dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n");
                return -ENOMEM;
        }
+        rtc->sclk = devm_clk_get(&pdev->dev, NULL);
+        if (IS_ERR(rtc->sclk))
+                return PTR_ERR(rtc->sclk);
+        sclk_rate = clk_get_rate(rtc->sclk);
+        if (!sclk_rate || sclk_rate > AT91_RTT_RTPRES) {
+                dev_err(&pdev->dev, "Invalid slow clock rate\n");
+                return -EINVAL;
+        }
+        ret = clk_prepare_enable(rtc->sclk);
+        if (ret) {
+                dev_err(&pdev->dev, "Could not enable slow clock\n");
+                return ret;
+        }
        mr = rtt_readl(rtc, MR);
        /* unless RTT is counting at 1 Hz, re-initialize it */
-        if ((mr & AT91_RTT_RTPRES) != AT91_SLOW_CLOCK) {
+        if ((mr & AT91_RTT_RTPRES) != sclk_rate) {
-                mr = AT91_RTT_RTTRST | (AT91_SLOW_CLOCK & AT91_RTT_RTPRES);
+                mr = AT91_RTT_RTTRST | (sclk_rate & AT91_RTT_RTPRES);
                gpbr_writel(rtc, 0);
        }
@@ -383,6 +451,9 @@ static int at91_rtc_remove(struct platform_device *pdev)
        /* disable all interrupts */
        rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));
+        if (!IS_ERR(rtc->sclk))
+                clk_disable_unprepare(rtc->sclk);
        return 0;
 }
@@ -440,6 +511,14 @@ static int at91_rtc_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
+#ifdef CONFIG_OF
+static const struct of_device_id at91_rtc_dt_ids[] = {
+        { .compatible = "atmel,at91sam9260-rtt" },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
+#endif
 static struct platform_driver at91_rtc_driver = {
        .probe          = at91_rtc_probe,
        .remove         = at91_rtc_remove,
@@ -448,6 +527,7 @@ static struct platform_driver at91_rtc_driver = {
                .name   = "rtc-at91sam9",
                .owner  = THIS_MODULE,
                .pm     = &at91_rtc_pm_ops,
+                .of_match_table = of_match_ptr(at91_rtc_dt_ids),
        },
 };
diff --git a/drivers/soc/ti/knav_qmss.h b/drivers/soc/ti/knav_qmss.h
index bc9dcc8cc3ce..51da2341280d 100644
--- a/drivers/soc/ti/knav_qmss.h
+++ b/drivers/soc/ti/knav_qmss.h
@@ -348,15 +348,15 @@ struct knav_range_info {
        list_for_each_entry(region, &kdev->regions, list)
 #define first_region(kdev)                                      \
-        list_first_entry(&kdev->regions, \
+        list_first_entry_or_null(&kdev->regions, \
-                        struct knav_region, list)
+                                 struct knav_region, list)
 #define for_each_queue_range(kdev, range)                       \
        list_for_each_entry(range, &kdev->queue_ranges, list)
 #define first_queue_range(kdev)                                 \
-        list_first_entry(&kdev->queue_ranges, \
+        list_first_entry_or_null(&kdev->queue_ranges, \
-                        struct knav_range_info, list)
+                                 struct knav_range_info, list)
 #define for_each_pool(kdev, pool)                               \
        list_for_each_entry(pool, &kdev->pools, list)
diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c
index 0a2c8634c48b..9b8dd6732681 100644
--- a/drivers/soc/ti/knav_qmss_queue.c
+++ b/drivers/soc/ti/knav_qmss_queue.c
@@ -785,7 +785,7 @@ void *knav_pool_create(const char *name,
                dev_err(kdev->dev, "out of descs in region(%d) for pool(%s)\n",
                        region_id, name);
                ret = -ENOMEM;
-                goto err;
+                goto err_unlock;
        }
        /* Region maintains a sorted (by region offset) list of pools
@@ -815,15 +815,16 @@ void *knav_pool_create(const char *name,
                dev_err(kdev->dev, "pool(%s) create failed: fragmented desc pool in region(%d)\n",
                        name, region_id);
                ret = -ENOMEM;
-                goto err;
+                goto err_unlock;
        }
        mutex_unlock(&knav_dev_lock);
        kdesc_fill_pool(pool);
        return pool;
-err:
+err_unlock:
        mutex_unlock(&knav_dev_lock);
+err:
        kfree(pool->name);
        devm_kfree(kdev->dev, pool);
        return ERR_PTR(ret);
@@ -1305,14 +1306,14 @@ static void knav_free_queue_ranges(struct knav_device *kdev)
 static void knav_queue_free_regions(struct knav_device *kdev)
 {
        struct knav_region *region;
-        struct knav_pool *pool;
+        struct knav_pool *pool, *tmp;
        unsigned size;
        for (;;) {
                region = first_region(kdev);
                if (!region)
                        break;
-                list_for_each_entry(pool, &region->pools, region_inst)
+                list_for_each_entry_safe(pool, tmp, &region->pools, region_inst)
                        knav_pool_destroy(pool);
                size = region->virt_end - region->virt_start;
@@ -1639,7 +1640,7 @@ static int knav_queue_init_queues(struct knav_device *kdev)
        size = (1 << kdev->inst_shift) * kdev->num_queues_in_use;
        kdev->instances = devm_kzalloc(kdev->dev, size, GFP_KERNEL);
        if (!kdev->instances)
-                return -1;
+                return -ENOMEM;
        for_each_queue_range(kdev, range) {
                if (range->ops && range->ops->init_range)
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 649b784081c7..98f8bcaf3e7e 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -249,14 +249,14 @@ config SERIAL_SAMSUNG
 config SERIAL_SAMSUNG_UARTS_4
        bool
-        depends on PLAT_SAMSUNG
+        depends on SERIAL_SAMSUNG
        default y if !(CPU_S3C2410 || CPU_S3C2412 || CPU_S3C2440 || CPU_S3C2442)
        help
          Internal node for the common case of 4 Samsung compatible UARTs
 config SERIAL_SAMSUNG_UARTS
        int
-        depends on PLAT_SAMSUNG
+        depends on SERIAL_SAMSUNG
        default 4 if SERIAL_SAMSUNG_UARTS_4 || CPU_S3C2416
        default 3
        help
diff --git a/drivers/w1/masters/omap_hdq.c b/drivers/w1/masters/omap_hdq.c
index 9900e8ec7393..03321d6a2684 100644
--- a/drivers/w1/masters/omap_hdq.c
+++ b/drivers/w1/masters/omap_hdq.c
@@ -72,11 +72,18 @@ struct hdq_data {
 static int omap_hdq_probe(struct platform_device *pdev);
 static int omap_hdq_remove(struct platform_device *pdev);
+static struct of_device_id omap_hdq_dt_ids[] = {
+        { .compatible = "ti,omap3-1w" },
+        {}
+};
+MODULE_DEVICE_TABLE(of, omap_hdq_dt_ids);
 static struct platform_driver omap_hdq_driver = {
        .probe =        omap_hdq_probe,
        .remove =       omap_hdq_remove,
        .driver =       {
                .name = "omap_hdq",
+                .of_match_table = omap_hdq_dt_ids,
        },
 };
diff --git a/include/dt-bindings/clock/tegra114-car.h b/include/dt-bindings/clock/tegra114-car.h
index fc12621fb432..534c03f8ad72 100644
--- a/include/dt-bindings/clock/tegra114-car.h
+++ b/include/dt-bindings/clock/tegra114-car.h
@@ -49,7 +49,7 @@
 #define TEGRA114_CLK_I2S0 30
 /* 31 */
-/* 32 */
+#define TEGRA114_CLK_MC 32
 /* 33 */
 #define TEGRA114_CLK_APBDMA 34
 /* 35 */
diff --git a/include/dt-bindings/clock/tegra124-car.h b/include/dt-bindings/clock/tegra124-car.h
index 6bac637fd635..af9bc9a3ddbc 100644
--- a/include/dt-bindings/clock/tegra124-car.h
+++ b/include/dt-bindings/clock/tegra124-car.h
@@ -48,7 +48,7 @@
 #define TEGRA124_CLK_I2S0 30
 /* 31 */
-/* 32 */
+#define TEGRA124_CLK_MC 32
 /* 33 */
 #define TEGRA124_CLK_APBDMA 34
 /* 35 */
diff --git a/include/dt-bindings/clock/tegra20-car.h b/include/dt-bindings/clock/tegra20-car.h
index 9406207cfac8..04500b243a4d 100644
--- a/include/dt-bindings/clock/tegra20-car.h
+++ b/include/dt-bindings/clock/tegra20-car.h
@@ -49,7 +49,7 @@
 /* 30 */
 #define TEGRA20_CLK_CACHE2 31
-#define TEGRA20_CLK_MEM 32
+#define TEGRA20_CLK_MC 32
 #define TEGRA20_CLK_AHBDMA 33
 #define TEGRA20_CLK_APBDMA 34
 /* 35 */
diff --git a/include/dt-bindings/memory/tegra114-mc.h b/include/dt-bindings/memory/tegra114-mc.h
new file mode 100644
index 000000000000..8f48985a3139
--- /dev/null
+++ b/include/dt-bindings/memory/tegra114-mc.h
@@ -0,0 +1,25 @@
+#ifndef DT_BINDINGS_MEMORY_TEGRA114_MC_H
+#define DT_BINDINGS_MEMORY_TEGRA114_MC_H
+#define TEGRA_SWGROUP_PTC       0
+#define TEGRA_SWGROUP_DC        1
+#define TEGRA_SWGROUP_DCB       2
+#define TEGRA_SWGROUP_EPP       3
+#define TEGRA_SWGROUP_G2        4
+#define TEGRA_SWGROUP_AVPC      5
+#define TEGRA_SWGROUP_NV        6
+#define TEGRA_SWGROUP_HDA       7
+#define TEGRA_SWGROUP_HC        8
+#define TEGRA_SWGROUP_MSENC     9
+#define TEGRA_SWGROUP_PPCS      10
+#define TEGRA_SWGROUP_VDE       11
+#define TEGRA_SWGROUP_MPCORELP  12
+#define TEGRA_SWGROUP_MPCORE    13
+#define TEGRA_SWGROUP_VI        14
+#define TEGRA_SWGROUP_ISP       15
+#define TEGRA_SWGROUP_XUSB_HOST 16
+#define TEGRA_SWGROUP_XUSB_DEV  17
+#define TEGRA_SWGROUP_EMUCIF    18
+#define TEGRA_SWGROUP_TSEC      19
+#endif
diff --git a/include/dt-bindings/memory/tegra124-mc.h b/include/dt-bindings/memory/tegra124-mc.h
new file mode 100644
index 000000000000..7d8ee798f34e
--- /dev/null
+++ b/include/dt-bindings/memory/tegra124-mc.h
@@ -0,0 +1,31 @@
+#ifndef DT_BINDINGS_MEMORY_TEGRA124_MC_H
+#define DT_BINDINGS_MEMORY_TEGRA124_MC_H
+#define TEGRA_SWGROUP_PTC       0
+#define TEGRA_SWGROUP_DC        1
+#define TEGRA_SWGROUP_DCB       2
+#define TEGRA_SWGROUP_AFI       3
+#define TEGRA_SWGROUP_AVPC      4
+#define TEGRA_SWGROUP_HDA       5
+#define TEGRA_SWGROUP_HC        6
+#define TEGRA_SWGROUP_MSENC     7
+#define TEGRA_SWGROUP_PPCS      8
+#define TEGRA_SWGROUP_SATA      9
+#define TEGRA_SWGROUP_VDE       10
+#define TEGRA_SWGROUP_MPCORELP  11
+#define TEGRA_SWGROUP_MPCORE    12
+#define TEGRA_SWGROUP_ISP2      13
+#define TEGRA_SWGROUP_XUSB_HOST 14
+#define TEGRA_SWGROUP_XUSB_DEV  15
+#define TEGRA_SWGROUP_ISP2B     16
+#define TEGRA_SWGROUP_TSEC      17
+#define TEGRA_SWGROUP_A9AVP     18
+#define TEGRA_SWGROUP_GPU       19
+#define TEGRA_SWGROUP_SDMMC1A   20
+#define TEGRA_SWGROUP_SDMMC2A   21
+#define TEGRA_SWGROUP_SDMMC3A   22
+#define TEGRA_SWGROUP_SDMMC4A   23
+#define TEGRA_SWGROUP_VIC       24
+#define TEGRA_SWGROUP_VI        25
+#endif
diff --git a/include/dt-bindings/memory/tegra30-mc.h b/include/dt-bindings/memory/tegra30-mc.h
new file mode 100644
index 000000000000..502beb03d777
--- /dev/null
+++ b/include/dt-bindings/memory/tegra30-mc.h
@@ -0,0 +1,24 @@
+#ifndef DT_BINDINGS_MEMORY_TEGRA30_MC_H
+#define DT_BINDINGS_MEMORY_TEGRA30_MC_H
+#define TEGRA_SWGROUP_PTC       0
+#define TEGRA_SWGROUP_DC        1
+#define TEGRA_SWGROUP_DCB       2
+#define TEGRA_SWGROUP_EPP       3
+#define TEGRA_SWGROUP_G2        4
+#define TEGRA_SWGROUP_MPE       5
+#define TEGRA_SWGROUP_VI        6
+#define TEGRA_SWGROUP_AFI       7
+#define TEGRA_SWGROUP_AVPC      8
+#define TEGRA_SWGROUP_NV        9
+#define TEGRA_SWGROUP_NV2       10
+#define TEGRA_SWGROUP_HDA       11
+#define TEGRA_SWGROUP_HC        12
+#define TEGRA_SWGROUP_PPCS      13
+#define TEGRA_SWGROUP_SATA      14
+#define TEGRA_SWGROUP_VDE       15
+#define TEGRA_SWGROUP_MPCORELP  16
+#define TEGRA_SWGROUP_MPCORE    17
+#define TEGRA_SWGROUP_ISP       18
+#endif
diff --git a/include/dt-bindings/reset-controller/stih407-resets.h b/include/dt-bindings/reset-controller/stih407-resets.h
new file mode 100644
index 000000000000..02d4328fe479
--- /dev/null
+++ b/include/dt-bindings/reset-controller/stih407-resets.h
@@ -0,0 +1,61 @@
+/*
+ * This header provides constants for the reset controller
+ * based peripheral powerdown requests on the STMicroelectronics
+ * STiH407 SoC.
+ */
+#ifndef _DT_BINDINGS_RESET_CONTROLLER_STIH407
+#define _DT_BINDINGS_RESET_CONTROLLER_STIH407
+/* Powerdown requests control 0 */
+#define STIH407_EMISS_POWERDOWN         0
+#define STIH407_NAND_POWERDOWN          1
+/* Synp GMAC PowerDown */
+#define STIH407_ETH1_POWERDOWN          2
+/* Powerdown requests control 1 */
+#define STIH407_USB3_POWERDOWN          3
+#define STIH407_USB2_PORT1_POWERDOWN    4
+#define STIH407_USB2_PORT0_POWERDOWN    5
+#define STIH407_PCIE1_POWERDOWN         6
+#define STIH407_PCIE0_POWERDOWN         7
+#define STIH407_SATA1_POWERDOWN         8
+#define STIH407_SATA0_POWERDOWN         9
+/* Reset defines */
+#define STIH407_ETH1_SOFTRESET          0
+#define STIH407_MMC1_SOFTRESET          1
+#define STIH407_PICOPHY_SOFTRESET       2
+#define STIH407_IRB_SOFTRESET           3
+#define STIH407_PCIE0_SOFTRESET         4
+#define STIH407_PCIE1_SOFTRESET         5
+#define STIH407_SATA0_SOFTRESET         6
+#define STIH407_SATA1_SOFTRESET         7
+#define STIH407_MIPHY0_SOFTRESET        8
+#define STIH407_MIPHY1_SOFTRESET        9
+#define STIH407_MIPHY2_SOFTRESET        10
+#define STIH407_SATA0_PWR_SOFTRESET     11
+#define STIH407_SATA1_PWR_SOFTRESET     12
+#define STIH407_DELTA_SOFTRESET         13
+#define STIH407_BLITTER_SOFTRESET       14
+#define STIH407_HDTVOUT_SOFTRESET       15
+#define STIH407_HDQVDP_SOFTRESET        16
+#define STIH407_VDP_AUX_SOFTRESET       17
+#define STIH407_COMPO_SOFTRESET         18
+#define STIH407_HDMI_TX_PHY_SOFTRESET   19
+#define STIH407_JPEG_DEC_SOFTRESET      20
+#define STIH407_VP8_DEC_SOFTRESET       21
+#define STIH407_GPU_SOFTRESET           22
+#define STIH407_HVA_SOFTRESET           23
+#define STIH407_ERAM_HVA_SOFTRESET      24
+#define STIH407_LPM_SOFTRESET           25
+#define STIH407_KEYSCAN_SOFTRESET       26
+#define STIH407_USB2_PORT0_SOFTRESET    27
+#define STIH407_USB2_PORT1_SOFTRESET    28
+/* Picophy reset defines */
+#define STIH407_PICOPHY0_RESET          0
+#define STIH407_PICOPHY1_RESET          1
+#define STIH407_PICOPHY2_RESET          2
+#endif /* _DT_BINDINGS_RESET_CONTROLLER_STIH407 */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index e6a7c9ff72f2..b29a5982e1c3 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -22,6 +22,7 @@
 #include <linux/errno.h>
 #include <linux/err.h>
 #include <linux/types.h>
+#include <linux/scatterlist.h>
 #include <trace/events/iommu.h>
 #define IOMMU_READ      (1 << 0)
@@ -97,6 +98,8 @@ enum iommu_attr {
 * @detach_dev: detach device from an iommu domain
 * @map: map a physically contiguous memory region to an iommu domain
 * @unmap: unmap a physically contiguous memory region from an iommu domain
+ * @map_sg: map a scatter-gather list of physically contiguous memory chunks
+ * to an iommu domain
 * @iova_to_phys: translate iova to physical address
 * @add_device: add device to iommu grouping
 * @remove_device: remove device from iommu grouping
@@ -114,6 +117,8 @@ struct iommu_ops {
                   phys_addr_t paddr, size_t size, int prot);
        size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
                     size_t size);
+        size_t (*map_sg)(struct iommu_domain *domain, unsigned long iova,
+                         struct scatterlist *sg, unsigned int nents, int prot);
        phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
        int (*add_device)(struct device *dev);
        void (*remove_device)(struct device *dev);
@@ -156,6 +161,9 @@ extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
                     phys_addr_t paddr, size_t size, int prot);
 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
                       size_t size);
+extern size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
+                                struct scatterlist *sg,unsigned int nents,
+                                int prot);
 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
 extern void iommu_set_fault_handler(struct iommu_domain *domain,
                        iommu_fault_handler_t handler, void *token);
@@ -241,6 +249,13 @@ static inline int report_iommu_fault(struct iommu_domain *domain,
        return ret;
 }
+static inline size_t iommu_map_sg(struct iommu_domain *domain,
+                                  unsigned long iova, struct scatterlist *sg,
+                                  unsigned int nents, int prot)
+{
+        return domain->ops->map_sg(domain, iova, sg, nents, prot);
+}
 #else /* CONFIG_IOMMU_API */
 struct iommu_ops {};
@@ -293,6 +308,13 @@ static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
        return -ENODEV;
 }
+static inline size_t iommu_map_sg(struct iommu_domain *domain,
+                                  unsigned long iova, struct scatterlist *sg,
+                                  unsigned int nents, int prot)
+{
+        return -ENODEV;
+}
 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
                                             u32 wnd_nr, phys_addr_t paddr,
                                             u64 size, int prot)
diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h
index 41a4695fde08..ce6b962ffed4 100644
--- a/include/linux/reset-controller.h
+++ b/include/linux/reset-controller.h
@@ -12,11 +12,13 @@ struct reset_controller_dev;
 *         things to reset the device
 * @assert: manually assert the reset line, if supported
 * @deassert: manually deassert the reset line, if supported
+ * @status: return the status of the reset line, if supported
 */
 struct reset_control_ops {
        int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
        int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
        int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
+        int (*status)(struct reset_controller_dev *rcdev, unsigned long id);
 };
 struct module;
diff --git a/include/linux/reset.h b/include/linux/reset.h
index 349f150ae12c..da5602bd77d7 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -10,6 +10,7 @@ struct reset_control;
 int reset_control_reset(struct reset_control *rstc);
 int reset_control_assert(struct reset_control *rstc);
 int reset_control_deassert(struct reset_control *rstc);
+int reset_control_status(struct reset_control *rstc);
 struct reset_control *reset_control_get(struct device *dev, const char *id);
 void reset_control_put(struct reset_control *rstc);
@@ -57,6 +58,12 @@ static inline int reset_control_deassert(struct reset_control *rstc)
        return 0;
 }
+static inline int reset_control_status(struct reset_control *rstc)
+{
+        WARN_ON(1);
+        return 0;
+}
 static inline void reset_control_put(struct reset_control *rstc)
 {
        WARN_ON(1);
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
new file mode 100644
index 000000000000..63deb8d9f82a
--- /dev/null
+++ b/include/soc/tegra/mc.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2014 NVIDIA Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __SOC_TEGRA_MC_H__
+#define __SOC_TEGRA_MC_H__
+#include <linux/types.h>
+struct clk;
+struct device;
+struct page;
+struct tegra_smmu_enable {
+        unsigned int reg;
+        unsigned int bit;
+};
+/* latency allowance */
+struct tegra_mc_la {
+        unsigned int reg;
+        unsigned int shift;
+        unsigned int mask;
+        unsigned int def;
+};
+struct tegra_mc_client {
+        unsigned int id;
+        const char *name;
+        unsigned int swgroup;
+        unsigned int fifo_size;
+        struct tegra_smmu_enable smmu;
+        struct tegra_mc_la la;
+};
+struct tegra_smmu_swgroup {
+        unsigned int swgroup;
+        unsigned int reg;
+};
+struct tegra_smmu_ops {
+        void (*flush_dcache)(struct page *page, unsigned long offset,
+                             size_t size);
+};
+struct tegra_smmu_soc {
+        const struct tegra_mc_client *clients;
+        unsigned int num_clients;
+        const struct tegra_smmu_swgroup *swgroups;
+        unsigned int num_swgroups;
+        bool supports_round_robin_arbitration;
+        bool supports_request_limit;
+        unsigned int num_asids;
+        const struct tegra_smmu_ops *ops;
+};
+struct tegra_mc;
+struct tegra_smmu;
+#ifdef CONFIG_TEGRA_IOMMU_SMMU
+struct tegra_smmu *tegra_smmu_probe(struct device *dev,
+                                    const struct tegra_smmu_soc *soc,
+                                    struct tegra_mc *mc);
+#else
+static inline struct tegra_smmu *
+tegra_smmu_probe(struct device *dev, const struct tegra_smmu_soc *soc,
+                 struct tegra_mc *mc)
+{
+        return NULL;
+}
+#endif
+struct tegra_mc_soc {
+        const struct tegra_mc_client *clients;
+        unsigned int num_clients;
+        const unsigned int *emem_regs;
+        unsigned int num_emem_regs;
+        unsigned int num_address_bits;
+        unsigned int atom_size;
+        const struct tegra_smmu_soc *smmu;
+};
+struct tegra_mc {
+        struct device *dev;
+        struct tegra_smmu *smmu;
+        void __iomem *regs;
+        struct clk *clk;
+        int irq;
+        const struct tegra_mc_soc *soc;
+        unsigned long tick;
+};
+#endif /* __SOC_TEGRA_MC_H__ */
author	Linus Torvalds <torvalds@linux-foundation.org>	2014-12-09 17:48:22 -0500
committer	Linus Torvalds <torvalds@linux-foundation.org>	2014-12-09 17:48:22 -0500
commit	3a647c1d7ab08145cee4b650f5e797d168846c51 (patch)
tree	6fcbc8ad1fc69b5a99214e22f6084452bdf0131c
parent	6cd94d5e57ab97ddd672b707ab4bb639672c1727 (diff)
parent	5db45002576f7d60c5bf7b23e277845cd3e806be (diff)