manual update from upstream:

Applied Al's change 06a544971fad0992fe8b92c5647538d573089dd4
to new location of swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

5 files changed, 72 insertions, 27 deletions

diff --git a/include/asm-arm/arch-ixp2000/io.h b/include/asm-arm/arch-ixp2000/io.h
index 3241cd6f0778..7fbcdf9931ee 100644
--- a/include/asm-arm/arch-ixp2000/io.h
+++ b/include/asm-arm/arch-ixp2000/io.h
@@ -15,6 +15,8 @@
 #ifndef __ASM_ARM_ARCH_IO_H
 #define __ASM_ARM_ARCH_IO_H
 
+#include <asm/hardware.h>
+
 #define IO_SPACE_LIMIT          0xffffffff
 #define __mem_pci(a)            (a)
 
diff --git a/include/asm-arm/arch-ixp2000/ixdp2x01.h b/include/asm-arm/arch-ixp2000/ixdp2x01.h
index b768009c3a51..c6d51426e98f 100644
--- a/include/asm-arm/arch-ixp2000/ixdp2x01.h
+++ b/include/asm-arm/arch-ixp2000/ixdp2x01.h
@@ -22,7 +22,7 @@
 #define IXDP2X01_CPLD_REGION_SIZE       0x00100000
 
 #define IXDP2X01_CPLD_VIRT_REG(reg) (volatile unsigned long*)(IXDP2X01_VIRT_CPLD_BASE | reg)
-#define IXDP2X01_CPLD_PHYS_REG(reg) (volatile u32*)(IXDP2X01_PHYS_CPLD_BASE | reg)
+#define IXDP2X01_CPLD_PHYS_REG(reg) (IXDP2X01_PHYS_CPLD_BASE | reg)
 
 #define IXDP2X01_UART1_VIRT_BASE        IXDP2X01_CPLD_VIRT_REG(0x40)
 #define IXDP2X01_UART1_PHYS_BASE        IXDP2X01_CPLD_PHYS_REG(0x40)
diff --git a/include/asm-arm/arch-ixp2000/ixp2000-regs.h b/include/asm-arm/arch-ixp2000/ixp2000-regs.h
index 32aece069869..def089d693d2 100644
--- a/include/asm-arm/arch-ixp2000/ixp2000-regs.h
+++ b/include/asm-arm/arch-ixp2000/ixp2000-regs.h
@@ -392,4 +392,47 @@
 #define WDT_RESET_ENABLE                0x01000000
 
 
+/*
+ * MSF registers.  The IXP2400 and IXP2800 have somewhat different MSF
+ * units, but the registers that differ between the two don't overlap,
+ * so we can have one register list for both.
+ */
+#define IXP2000_MSF_REG(x)                      ((volatile unsigned long*)(IXP2000_MSF_VIRT_BASE + (x)))
+#define IXP2000_MSF_RX_CONTROL                  IXP2000_MSF_REG(0x0000)
+#define IXP2000_MSF_TX_CONTROL                  IXP2000_MSF_REG(0x0004)
+#define IXP2000_MSF_INTERRUPT_STATUS            IXP2000_MSF_REG(0x0008)
+#define IXP2000_MSF_INTERRUPT_ENABLE            IXP2000_MSF_REG(0x000c)
+#define IXP2000_MSF_CSIX_TYPE_MAP               IXP2000_MSF_REG(0x0010)
+#define IXP2000_MSF_FC_EGRESS_STATUS            IXP2000_MSF_REG(0x0014)
+#define IXP2000_MSF_FC_INGRESS_STATUS           IXP2000_MSF_REG(0x0018)
+#define IXP2000_MSF_HWM_CONTROL                 IXP2000_MSF_REG(0x0024)
+#define IXP2000_MSF_FC_STATUS_OVERRIDE          IXP2000_MSF_REG(0x0028)
+#define IXP2000_MSF_CLOCK_CONTROL               IXP2000_MSF_REG(0x002c)
+#define IXP2000_MSF_RX_PORT_MAP                 IXP2000_MSF_REG(0x0040)
+#define IXP2000_MSF_RBUF_ELEMENT_DONE           IXP2000_MSF_REG(0x0044)
+#define IXP2000_MSF_RX_MPHY_POLL_LIMIT          IXP2000_MSF_REG(0x0048)
+#define IXP2000_MSF_RX_CALENDAR_LENGTH          IXP2000_MSF_REG(0x0048)
+#define IXP2000_MSF_RX_THREAD_FREELIST_TIMEOUT_0        IXP2000_MSF_REG(0x0050)
+#define IXP2000_MSF_RX_THREAD_FREELIST_TIMEOUT_1        IXP2000_MSF_REG(0x0054)
+#define IXP2000_MSF_RX_THREAD_FREELIST_TIMEOUT_2        IXP2000_MSF_REG(0x0058)
+#define IXP2000_MSF_TX_SEQUENCE_0               IXP2000_MSF_REG(0x0060)
+#define IXP2000_MSF_TX_SEQUENCE_1               IXP2000_MSF_REG(0x0064)
+#define IXP2000_MSF_TX_SEQUENCE_2               IXP2000_MSF_REG(0x0068)
+#define IXP2000_MSF_TX_MPHY_POLL_LIMIT          IXP2000_MSF_REG(0x0070)
+#define IXP2000_MSF_TX_CALENDAR_LENGTH          IXP2000_MSF_REG(0x0070)
+#define IXP2000_MSF_RX_UP_CONTROL_0             IXP2000_MSF_REG(0x0080)
+#define IXP2000_MSF_RX_UP_CONTROL_1             IXP2000_MSF_REG(0x0084)
+#define IXP2000_MSF_RX_UP_CONTROL_2             IXP2000_MSF_REG(0x0088)
+#define IXP2000_MSF_RX_UP_CONTROL_3             IXP2000_MSF_REG(0x008c)
+#define IXP2000_MSF_TX_UP_CONTROL_0             IXP2000_MSF_REG(0x0090)
+#define IXP2000_MSF_TX_UP_CONTROL_1             IXP2000_MSF_REG(0x0094)
+#define IXP2000_MSF_TX_UP_CONTROL_2             IXP2000_MSF_REG(0x0098)
+#define IXP2000_MSF_TX_UP_CONTROL_3             IXP2000_MSF_REG(0x009c)
+#define IXP2000_MSF_TRAIN_DATA                  IXP2000_MSF_REG(0x00a0)
+#define IXP2000_MSF_TRAIN_CALENDAR              IXP2000_MSF_REG(0x00a4)
+#define IXP2000_MSF_TRAIN_FLOW_CONTROL          IXP2000_MSF_REG(0x00a8)
+#define IXP2000_MSF_TX_CALENDAR_0               IXP2000_MSF_REG(0x1000)
+#define IXP2000_MSF_RX_PORT_CALENDAR_STATUS     IXP2000_MSF_REG(0x1400)
+
+
 #endif                          /* _IXP2000_H_ */
diff --git a/include/asm-arm/arch-ixp2000/memory.h b/include/asm-arm/arch-ixp2000/memory.h
index d0f415c6dae9..21e1de51e3f6 100644
--- a/include/asm-arm/arch-ixp2000/memory.h
+++ b/include/asm-arm/arch-ixp2000/memory.h
@@ -13,7 +13,7 @@
 #ifndef __ASM_ARCH_MEMORY_H
 #define __ASM_ARCH_MEMORY_H
 
-#define PHYS_OFFSET     (0x00000000UL)
+#define PHYS_OFFSET     UL(0x00000000)
 
 /*
  * Virtual view <-> DMA view memory address translations
diff --git a/include/asm-arm/arch-ixp2000/platform.h b/include/asm-arm/arch-ixp2000/platform.h
index abdcf51bd283..a66317ab2071 100644
--- a/include/asm-arm/arch-ixp2000/platform.h
+++ b/include/asm-arm/arch-ixp2000/platform.h
@@ -15,40 +15,40 @@
 
 #ifndef __ASSEMBLY__
 
+static inline unsigned long ixp2000_reg_read(volatile void *reg)
+{
+        return *((volatile unsigned long *)reg);
+}
+
+static inline void ixp2000_reg_write(volatile void *reg, unsigned long val)
+{
+        *((volatile unsigned long *)reg) = val;
+}
+
 /*
- * The IXP2400 B0 silicon contains an erratum (#66) that causes writes
- * to on-chip I/O register to not complete fully. What this means is
- * that if you have a write to on-chip I/O followed by a back-to-back
- * read or write, the first write will happen twice. OR...if it's
- * not a back-to-back transaction, the read or write will generate
- * incorrect data.
- *
- * The official work around for this is to set the on-chip I/O regions
- * as XCB=101 and then force a read-back from the register.
+ * On the IXP2400, we can't use XCB=000 due to chip bugs.  We use
+ * XCB=101 instead, but that makes all I/O accesses bufferable.  This
+ * is not a problem in general, but we do have to be slightly more
+ * careful because I/O writes are no longer automatically flushed out
+ * of the write buffer.
  *
+ * In cases where we want to make sure that a write has been flushed
+ * out of the write buffer before we proceed, for example when masking
+ * a device interrupt before re-enabling IRQs in CPSR, we can use this
+ * function, ixp2000_reg_wrb, which performs a write, a readback, and
+ * issues a dummy instruction dependent on the value of the readback
+ * (mov rX, rX) to make sure that the readback has completed before we
+ * continue.
  */
-#if defined(CONFIG_ARCH_ENP2611) || defined(CONFIG_ARCH_IXDP2400) || defined(CONFIG_ARCH_IXDP2401)
-
-#include <asm/system.h>         /* Pickup local_irq_ functions */
-
-static inline void ixp2000_reg_write(volatile void *reg, unsigned long val)
+static inline void ixp2000_reg_wrb(volatile void *reg, unsigned long val)
 {
         unsigned long dummy;
-        unsigned long flags;
 
-        local_irq_save(flags);
         *((volatile unsigned long *)reg) = val;
-        barrier();
+
         dummy = *((volatile unsigned long *)reg);
-        local_irq_restore(flags);
-}
-#else
-static inline void ixp2000_reg_write(volatile void *reg, unsigned long val)
-{
-        *((volatile unsigned long *)reg) = val;
+        __asm__ __volatile__("mov %0, %0" : "+r" (dummy));
 }
-#endif  /* IXDP2400 || IXDP2401 */
-#define ixp2000_reg_read(reg)   (*((volatile unsigned long *)reg))
 
 /*
  * Boards may multiplex different devices on the 2nd channel of