1 files changed, 265 insertions, 74 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0bc27e059019..1531f3a49879 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -19,8 +19,8 @@
 #include <linux/pci-aspm.h>
 #include <linux/pm_wakeup.h>
 #include <linux/interrupt.h>
-#include <asm/dma.h>    /* isa_dma_bridge_buggy */
 #include <linux/device.h>
+#include <linux/pm_runtime.h>
 #include <asm/setup.h>
 #include "pci.h"
 
@@ -29,7 +29,23 @@ const char *pci_power_names[] = {
 };
 EXPORT_SYMBOL_GPL(pci_power_names);
 
-unsigned int pci_pm_d3_delay = PCI_PM_D3_WAIT;
+int isa_dma_bridge_buggy;
+EXPORT_SYMBOL(isa_dma_bridge_buggy);
+
+int pci_pci_problems;
+EXPORT_SYMBOL(pci_pci_problems);
+
+unsigned int pci_pm_d3_delay;
+
+static void pci_dev_d3_sleep(struct pci_dev *dev)
+{
+        unsigned int delay = dev->d3_delay;
+
+        if (delay < pci_pm_d3_delay)
+                delay = pci_pm_d3_delay;
+
+        msleep(delay);
+}
 
 #ifdef CONFIG_PCI_DOMAINS
 int pci_domains_supported = 1;
@@ -287,6 +303,49 @@ int pci_find_ext_capability(struct pci_dev *dev, int cap)
 }
 EXPORT_SYMBOL_GPL(pci_find_ext_capability);
 
+/**
+ * pci_bus_find_ext_capability - find an extended capability
+ * @bus:   the PCI bus to query
+ * @devfn: PCI device to query
+ * @cap:   capability code
+ *
+ * Like pci_find_ext_capability() but works for pci devices that do not have a
+ * pci_dev structure set up yet.
+ *
+ * Returns the address of the requested capability structure within the
+ * device's PCI configuration space or 0 in case the device does not
+ * support it.
+ */
+int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn,
+                                int cap)
+{
+        u32 header;
+        int ttl;
+        int pos = PCI_CFG_SPACE_SIZE;
+
+        /* minimum 8 bytes per capability */
+        ttl = (PCI_CFG_SPACE_EXP_SIZE - PCI_CFG_SPACE_SIZE) / 8;
+
+        if (!pci_bus_read_config_dword(bus, devfn, pos, &header))
+                return 0;
+        if (header == 0xffffffff || header == 0)
+                return 0;
+
+        while (ttl-- > 0) {
+                if (PCI_EXT_CAP_ID(header) == cap)
+                        return pos;
+
+                pos = PCI_EXT_CAP_NEXT(header);
+                if (pos < PCI_CFG_SPACE_SIZE)
+                        break;
+
+                if (!pci_bus_read_config_dword(bus, devfn, pos, &header))
+                        break;
+        }
+
+        return 0;
+}
+
 static int __pci_find_next_ht_cap(struct pci_dev *dev, int pos, int ht_cap)
 {
         int rc, ttl = PCI_FIND_CAP_TTL;
@@ -370,10 +429,9 @@ pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
 {
         const struct pci_bus *bus = dev->bus;
         int i;
-        struct resource *best = NULL;
+        struct resource *best = NULL, *r;
 
-        for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
-                struct resource *r = bus->resource[i];
+        pci_bus_for_each_resource(bus, r, i) {
                 if (!r)
                         continue;
                 if (res->start && !(res->start >= r->start && res->end <= r->end))
@@ -447,6 +505,12 @@ static inline int platform_pci_sleep_wake(struct pci_dev *dev, bool enable)
                         pci_platform_pm->sleep_wake(dev, enable) : -ENODEV;
 }
 
+static inline int platform_pci_run_wake(struct pci_dev *dev, bool enable)
+{
+        return pci_platform_pm ?
+                        pci_platform_pm->run_wake(dev, enable) : -ENODEV;
+}
+
 /**
  * pci_raw_set_power_state - Use PCI PM registers to set the power state of
  *                           given PCI device
@@ -522,7 +586,7 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state)
         /* Mandatory power management transition delays */
         /* see PCI PM 1.1 5.6.1 table 18 */
         if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
-                msleep(pci_pm_d3_delay);
+                pci_dev_d3_sleep(dev);
         else if (state == PCI_D2 || dev->current_state == PCI_D2)
                 udelay(PCI_PM_D2_DELAY);
 
@@ -1153,11 +1217,11 @@ pci_disable_device(struct pci_dev *dev)
 
 /**
  * pcibios_set_pcie_reset_state - set reset state for device dev
- * @dev: the PCI-E device reset
+ * @dev: the PCIe device reset
  * @state: Reset state to enter into
  *
  *
- * Sets the PCI-E reset state for the device. This is the default
+ * Sets the PCIe reset state for the device. This is the default
  * implementation. Architecture implementations can override this.
  */
 int __attribute__ ((weak)) pcibios_set_pcie_reset_state(struct pci_dev *dev,
@@ -1168,7 +1232,7 @@ int __attribute__ ((weak)) pcibios_set_pcie_reset_state(struct pci_dev *dev,
 
 /**
  * pci_set_pcie_reset_state - set reset state for device dev
- * @dev: the PCI-E device reset
+ * @dev: the PCIe device reset
  * @state: Reset state to enter into
  *
  *
@@ -1180,6 +1244,66 @@ int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state)
 }
 
 /**
+ * pci_check_pme_status - Check if given device has generated PME.
+ * @dev: Device to check.
+ *
+ * Check the PME status of the device and if set, clear it and clear PME enable
+ * (if set).  Return 'true' if PME status and PME enable were both set or
+ * 'false' otherwise.
+ */
+bool pci_check_pme_status(struct pci_dev *dev)
+{
+        int pmcsr_pos;
+        u16 pmcsr;
+        bool ret = false;
+
+        if (!dev->pm_cap)
+                return false;
+
+        pmcsr_pos = dev->pm_cap + PCI_PM_CTRL;
+        pci_read_config_word(dev, pmcsr_pos, &pmcsr);
+        if (!(pmcsr & PCI_PM_CTRL_PME_STATUS))
+                return false;
+
+        /* Clear PME status. */
+        pmcsr |= PCI_PM_CTRL_PME_STATUS;
+        if (pmcsr & PCI_PM_CTRL_PME_ENABLE) {
+                /* Disable PME to avoid interrupt flood. */
+                pmcsr &= ~PCI_PM_CTRL_PME_ENABLE;
+                ret = true;
+        }
+
+        pci_write_config_word(dev, pmcsr_pos, pmcsr);
+
+        return ret;
+}
+
+/**
+ * pci_pme_wakeup - Wake up a PCI device if its PME Status bit is set.
+ * @dev: Device to handle.
+ * @ign: Ignored.
+ *
+ * Check if @dev has generated PME and queue a resume request for it in that
+ * case.
+ */
+static int pci_pme_wakeup(struct pci_dev *dev, void *ign)
+{
+        if (pci_check_pme_status(dev))
+                pm_request_resume(&dev->dev);
+        return 0;
+}
+
+/**
+ * pci_pme_wakeup_bus - Walk given bus and wake up devices on it, if necessary.
+ * @bus: Top bus of the subtree to walk.
+ */
+void pci_pme_wakeup_bus(struct pci_bus *bus)
+{
+        if (bus)
+                pci_walk_bus(bus, pci_pme_wakeup, NULL);
+}
+
+/**
  * pci_pme_capable - check the capability of PCI device to generate PME#
  * @dev: PCI device to handle.
  * @state: PCI state from which device will issue PME#.
@@ -1220,9 +1344,10 @@ void pci_pme_active(struct pci_dev *dev, bool enable)
 }
 
 /**
- * pci_enable_wake - enable PCI device as wakeup event source
+ * __pci_enable_wake - enable PCI device as wakeup event source
  * @dev: PCI device affected
  * @state: PCI state from which device will issue wakeup events
+ * @runtime: True if the events are to be generated at run time
  * @enable: True to enable event generation; false to disable
  *
  * This enables the device as a wakeup event source, or disables it.
@@ -1238,11 +1363,12 @@ void pci_pme_active(struct pci_dev *dev, bool enable)
  * Error code depending on the platform is returned if both the platform and
  * the native mechanism fail to enable the generation of wake-up events
  */
-int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
+int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
+                      bool runtime, bool enable)
 {
         int ret = 0;
 
-        if (enable && !device_may_wakeup(&dev->dev))
+        if (enable && !runtime && !device_may_wakeup(&dev->dev))
                 return -EINVAL;
 
         /* Don't do the same thing twice in a row for one device. */
@@ -1262,19 +1388,24 @@ int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
                         pci_pme_active(dev, true);
                 else
                         ret = 1;
-                error = platform_pci_sleep_wake(dev, true);
+                error = runtime ? platform_pci_run_wake(dev, true) :
+                                        platform_pci_sleep_wake(dev, true);
                 if (ret)
                         ret = error;
                 if (!ret)
                         dev->wakeup_prepared = true;
         } else {
-                platform_pci_sleep_wake(dev, false);
+                if (runtime)
+                        platform_pci_run_wake(dev, false);
+                else
+                        platform_pci_sleep_wake(dev, false);
                 pci_pme_active(dev, false);
                 dev->wakeup_prepared = false;
         }
 
         return ret;
 }
+EXPORT_SYMBOL(__pci_enable_wake);
 
 /**
  * pci_wake_from_d3 - enable/disable device to wake up from D3_hot or D3_cold
@@ -1384,6 +1515,66 @@ int pci_back_from_sleep(struct pci_dev *dev)
 }
 
 /**
+ * pci_finish_runtime_suspend - Carry out PCI-specific part of runtime suspend.
+ * @dev: PCI device being suspended.
+ *
+ * Prepare @dev to generate wake-up events at run time and put it into a low
+ * power state.
+ */
+int pci_finish_runtime_suspend(struct pci_dev *dev)
+{
+        pci_power_t target_state = pci_target_state(dev);
+        int error;
+
+        if (target_state == PCI_POWER_ERROR)
+                return -EIO;
+
+        __pci_enable_wake(dev, target_state, true, pci_dev_run_wake(dev));
+
+        error = pci_set_power_state(dev, target_state);
+
+        if (error)
+                __pci_enable_wake(dev, target_state, true, false);
+
+        return error;
+}
+
+/**
+ * pci_dev_run_wake - Check if device can generate run-time wake-up events.
+ * @dev: Device to check.
+ *
+ * Return true if the device itself is cabable of generating wake-up events
+ * (through the platform or using the native PCIe PME) or if the device supports
+ * PME and one of its upstream bridges can generate wake-up events.
+ */
+bool pci_dev_run_wake(struct pci_dev *dev)
+{
+        struct pci_bus *bus = dev->bus;
+
+        if (device_run_wake(&dev->dev))
+                return true;
+
+        if (!dev->pme_support)
+                return false;
+
+        while (bus->parent) {
+                struct pci_dev *bridge = bus->self;
+
+                if (device_run_wake(&bridge->dev))
+                        return true;
+
+                bus = bus->parent;
+        }
+
+        /* We have reached the root bus. */
+        if (bus->bridge)
+                return device_run_wake(bus->bridge);
+
+        return false;
+}
+EXPORT_SYMBOL_GPL(pci_dev_run_wake);
+
+/**
  * pci_pm_init - Initialize PM functions of given PCI device
  * @dev: PCI device to handle.
  */
@@ -1392,7 +1583,10 @@ void pci_pm_init(struct pci_dev *dev)
         int pm;
         u16 pmc;
 
+        pm_runtime_forbid(&dev->dev);
+        device_enable_async_suspend(&dev->dev);
         dev->wakeup_prepared = false;
+
         dev->pm_cap = 0;
 
         /* find PCI PM capability in list */
@@ -1409,6 +1603,7 @@ void pci_pm_init(struct pci_dev *dev)
         }
 
         dev->pm_cap = pm;
+        dev->d3_delay = PCI_PM_D3_WAIT;
 
         dev->d1_support = false;
         dev->d2_support = false;
@@ -2103,35 +2298,6 @@ void pci_msi_off(struct pci_dev *dev)
         }
 }
 
-#ifndef HAVE_ARCH_PCI_SET_DMA_MASK
-/*
- * These can be overridden by arch-specific implementations
- */
-int
-pci_set_dma_mask(struct pci_dev *dev, u64 mask)
-{
-        if (!pci_dma_supported(dev, mask))
-                return -EIO;
-
-        dev->dma_mask = mask;
-        dev_dbg(&dev->dev, "using %dbit DMA mask\n", fls64(mask));
-
-        return 0;
-}
-    
-int
-pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
-{
-        if (!pci_dma_supported(dev, mask))
-                return -EIO;
-
-        dev->dev.coherent_dma_mask = mask;
-        dev_dbg(&dev->dev, "using %dbit consistent DMA mask\n", fls64(mask));
-
-        return 0;
-}
-#endif
-
 #ifndef HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_SIZE
 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size)
 {
@@ -2247,12 +2413,12 @@ static int pci_pm_reset(struct pci_dev *dev, int probe)
         csr &= ~PCI_PM_CTRL_STATE_MASK;
         csr |= PCI_D3hot;
         pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, csr);
-        msleep(pci_pm_d3_delay);
+        pci_dev_d3_sleep(dev);
 
         csr &= ~PCI_PM_CTRL_STATE_MASK;
         csr |= PCI_D0;
         pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, csr);
-        msleep(pci_pm_d3_delay);
+        pci_dev_d3_sleep(dev);
 
         return 0;
 }
@@ -2293,9 +2459,13 @@ static int pci_dev_reset(struct pci_dev *dev, int probe)
         if (!probe) {
                 pci_block_user_cfg_access(dev);
                 /* block PM suspend, driver probe, etc. */
-                down(&dev->dev.sem);
+                device_lock(&dev->dev);
         }
 
+        rc = pci_dev_specific_reset(dev, probe);
+        if (rc != -ENOTTY)
+                goto done;
+
         rc = pcie_flr(dev, probe);
         if (rc != -ENOTTY)
                 goto done;
@@ -2311,7 +2481,7 @@ static int pci_dev_reset(struct pci_dev *dev, int probe)
         rc = pci_parent_bus_reset(dev, probe);
 done:
         if (!probe) {
-                up(&dev->dev.sem);
+                device_unlock(&dev->dev);
                 pci_unblock_user_cfg_access(dev);
         }
 
@@ -2406,18 +2576,17 @@ EXPORT_SYMBOL_GPL(pci_reset_function);
  */
 int pcix_get_max_mmrbc(struct pci_dev *dev)
 {
-        int err, cap;
+        int cap;
         u32 stat;
 
         cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
         if (!cap)
                 return -EINVAL;
 
-        err = pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat);
-        if (err)
+        if (pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat))
                 return -EINVAL;
 
-        return (stat & PCI_X_STATUS_MAX_READ) >> 12;
+        return 512 << ((stat & PCI_X_STATUS_MAX_READ) >> 21);
 }
 EXPORT_SYMBOL(pcix_get_max_mmrbc);
 
@@ -2430,18 +2599,17 @@ EXPORT_SYMBOL(pcix_get_max_mmrbc);
  */
 int pcix_get_mmrbc(struct pci_dev *dev)
 {
-        int ret, cap;
-        u32 cmd;
+        int cap;
+        u16 cmd;
 
         cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
         if (!cap)
                 return -EINVAL;
 
-        ret = pci_read_config_dword(dev, cap + PCI_X_CMD, &cmd);
-        if (!ret)
-                ret = 512 << ((cmd & PCI_X_CMD_MAX_READ) >> 2);
+        if (pci_read_config_word(dev, cap + PCI_X_CMD, &cmd))
+                return -EINVAL;
 
-        return ret;
+        return 512 << ((cmd & PCI_X_CMD_MAX_READ) >> 2);
 }
 EXPORT_SYMBOL(pcix_get_mmrbc);
 
@@ -2456,28 +2624,27 @@ EXPORT_SYMBOL(pcix_get_mmrbc);
  */
 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc)
 {
-        int cap, err = -EINVAL;
-        u32 stat, cmd, v, o;
+        int cap;
+        u32 stat, v, o;
+        u16 cmd;
 
         if (mmrbc < 512 || mmrbc > 4096 || !is_power_of_2(mmrbc))
-                goto out;
+                return -EINVAL;
 
         v = ffs(mmrbc) - 10;
 
         cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
         if (!cap)
-                goto out;
+                return -EINVAL;
 
-        err = pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat);
-        if (err)
-                goto out;
+        if (pci_read_config_dword(dev, cap + PCI_X_STATUS, &stat))
+                return -EINVAL;
 
         if (v > (stat & PCI_X_STATUS_MAX_READ) >> 21)
                 return -E2BIG;
 
-        err = pci_read_config_dword(dev, cap + PCI_X_CMD, &cmd);
-        if (err)
-                goto out;
+        if (pci_read_config_word(dev, cap + PCI_X_CMD, &cmd))
+                return -EINVAL;
 
         o = (cmd & PCI_X_CMD_MAX_READ) >> 2;
         if (o != v) {
@@ -2487,10 +2654,10 @@ int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc)
 
                 cmd &= ~PCI_X_CMD_MAX_READ;
                 cmd |= v << 2;
-                err = pci_write_config_dword(dev, cap + PCI_X_CMD, cmd);
+                if (pci_write_config_word(dev, cap + PCI_X_CMD, cmd))
+                        return -EIO;
         }
-out:
-        return err;
+        return 0;
 }
 EXPORT_SYMBOL(pcix_set_mmrbc);
 
@@ -2600,6 +2767,23 @@ int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
         return 0;
 }
 
+/* Some architectures require additional programming to enable VGA */
+static arch_set_vga_state_t arch_set_vga_state;
+
+void __init pci_register_set_vga_state(arch_set_vga_state_t func)
+{
+        arch_set_vga_state = func;      /* NULL disables */
+}
+
+static int pci_set_vga_state_arch(struct pci_dev *dev, bool decode,
+                      unsigned int command_bits, bool change_bridge)
+{
+        if (arch_set_vga_state)
+                return arch_set_vga_state(dev, decode, command_bits,
+                                                change_bridge);
+        return 0;
+}
+
 /**
  * pci_set_vga_state - set VGA decode state on device and parents if requested
  * @dev: the PCI device
@@ -2613,9 +2797,15 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode,
         struct pci_bus *bus;
         struct pci_dev *bridge;
         u16 cmd;
+        int rc;
 
         WARN_ON(command_bits & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY));
 
+        /* ARCH specific VGA enables */
+        rc = pci_set_vga_state_arch(dev, decode, command_bits, change_bridge);
+        if (rc)
+                return rc;
+
         pci_read_config_word(dev, PCI_COMMAND, &cmd);
         if (decode == true)
                 cmd |= command_bits;
@@ -2779,6 +2969,11 @@ int __attribute__ ((weak)) pci_ext_cfg_avail(struct pci_dev *dev)
         return 1;
 }
 
+void __weak pci_fixup_cardbus(struct pci_bus *bus)
+{
+}
+EXPORT_SYMBOL(pci_fixup_cardbus);
+
 static int __init pci_setup(char *str)
 {
         while (str) {
@@ -2840,8 +3035,6 @@ EXPORT_SYMBOL(pci_set_mwi);
 EXPORT_SYMBOL(pci_try_set_mwi);
 EXPORT_SYMBOL(pci_clear_mwi);
 EXPORT_SYMBOL_GPL(pci_intx);
-EXPORT_SYMBOL(pci_set_dma_mask);
-EXPORT_SYMBOL(pci_set_consistent_dma_mask);
 EXPORT_SYMBOL(pci_assign_resource);
 EXPORT_SYMBOL(pci_find_parent_resource);
 EXPORT_SYMBOL(pci_select_bars);
@@ -2851,10 +3044,8 @@ EXPORT_SYMBOL(pci_save_state);
 EXPORT_SYMBOL(pci_restore_state);
 EXPORT_SYMBOL(pci_pme_capable);
 EXPORT_SYMBOL(pci_pme_active);
-EXPORT_SYMBOL(pci_enable_wake);
 EXPORT_SYMBOL(pci_wake_from_d3);
 EXPORT_SYMBOL(pci_target_state);
 EXPORT_SYMBOL(pci_prepare_to_sleep);
 EXPORT_SYMBOL(pci_back_from_sleep);
 EXPORT_SYMBOL_GPL(pci_set_pcie_reset_state);
-