1 files changed, 171 insertions, 22 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0195066251e5..fe7ac2cea7c9 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -20,6 +20,8 @@
 #include <linux/pm_wakeup.h>
 #include <linux/interrupt.h>
 #include <asm/dma.h>    /* isa_dma_bridge_buggy */
+#include <linux/device.h>
+#include <asm/setup.h>
 #include "pci.h"
 
 unsigned int pci_pm_d3_delay = PCI_PM_D3_WAIT;
@@ -677,6 +679,8 @@ pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
 
 EXPORT_SYMBOL(pci_choose_state);
 
+#define PCI_EXP_SAVE_REGS       7
+
 static int pci_save_pcie_state(struct pci_dev *dev)
 {
         int pos, i = 0;
@@ -689,7 +693,7 @@ static int pci_save_pcie_state(struct pci_dev *dev)
 
         save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
         if (!save_state) {
-                dev_err(&dev->dev, "buffer not found in %s\n", __FUNCTION__);
+                dev_err(&dev->dev, "buffer not found in %s\n", __func__);
                 return -ENOMEM;
         }
         cap = (u16 *)&save_state->data[0];
@@ -698,6 +702,9 @@ static int pci_save_pcie_state(struct pci_dev *dev)
         pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]);
         pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]);
         pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]);
+        pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &cap[i++]);
+        pci_read_config_word(dev, pos + PCI_EXP_LNKCTL2, &cap[i++]);
+        pci_read_config_word(dev, pos + PCI_EXP_SLTCTL2, &cap[i++]);
 
         return 0;
 }
@@ -718,6 +725,9 @@ static void pci_restore_pcie_state(struct pci_dev *dev)
         pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]);
         pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]);
         pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]);
+        pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, cap[i++]);
+        pci_write_config_word(dev, pos + PCI_EXP_LNKCTL2, cap[i++]);
+        pci_write_config_word(dev, pos + PCI_EXP_SLTCTL2, cap[i++]);
 }
 
 
@@ -732,7 +742,7 @@ static int pci_save_pcix_state(struct pci_dev *dev)
 
         save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
         if (!save_state) {
-                dev_err(&dev->dev, "buffer not found in %s\n", __FUNCTION__);
+                dev_err(&dev->dev, "buffer not found in %s\n", __func__);
                 return -ENOMEM;
         }
 
@@ -805,6 +815,7 @@ pci_restore_state(struct pci_dev *dev)
         }
         pci_restore_pcix_state(dev);
         pci_restore_msi_state(dev);
+        pci_restore_iov_state(dev);
 
         return 0;
 }
@@ -1401,7 +1412,8 @@ void pci_allocate_cap_save_buffers(struct pci_dev *dev)
 {
         int error;
 
-        error = pci_add_cap_save_buffer(dev, PCI_CAP_ID_EXP, 4 * sizeof(u16));
+        error = pci_add_cap_save_buffer(dev, PCI_CAP_ID_EXP,
+                                        PCI_EXP_SAVE_REGS * sizeof(u16));
         if (error)
                 dev_err(&dev->dev,
                         "unable to preallocate PCI Express save buffer\n");
@@ -1472,7 +1484,7 @@ pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
         if (!pin)
                 return -1;
 
-        while (dev->bus->self) {
+        while (dev->bus->parent) {
                 pin = pci_swizzle_interrupt_pin(dev, pin);
                 dev = dev->bus->self;
         }
@@ -1492,7 +1504,7 @@ u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp)
 {
         u8 pin = *pinp;
 
-        while (dev->bus->self) {
+        while (dev->bus->parent) {
                 pin = pci_swizzle_interrupt_pin(dev, pin);
                 dev = dev->bus->self;
         }
@@ -2016,18 +2028,24 @@ static int __pcie_flr(struct pci_dev *dev, int probe)
         pci_block_user_cfg_access(dev);
 
         /* Wait for Transaction Pending bit clean */
+        pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
+        if (!(status & PCI_EXP_DEVSTA_TRPND))
+                goto transaction_done;
+
         msleep(100);
         pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
-        if (status & PCI_EXP_DEVSTA_TRPND) {
-                dev_info(&dev->dev, "Busy after 100ms while trying to reset; "
+        if (!(status & PCI_EXP_DEVSTA_TRPND))
+                goto transaction_done;
+
+        dev_info(&dev->dev, "Busy after 100ms while trying to reset; "
                         "sleeping for 1 second\n");
-                ssleep(1);
-                pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
-                if (status & PCI_EXP_DEVSTA_TRPND)
-                        dev_info(&dev->dev, "Still busy after 1s; "
+        ssleep(1);
+        pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
+        if (status & PCI_EXP_DEVSTA_TRPND)
+                dev_info(&dev->dev, "Still busy after 1s; "
                                 "proceeding with reset anyway\n");
-        }
 
+transaction_done:
         pci_write_config_word(dev, exppos + PCI_EXP_DEVCTL,
                                 PCI_EXP_DEVCTL_BCR_FLR);
         mdelay(100);
@@ -2054,18 +2072,24 @@ static int __pci_af_flr(struct pci_dev *dev, int probe)
         pci_block_user_cfg_access(dev);
 
         /* Wait for Transaction Pending bit clean */
+        pci_read_config_byte(dev, cappos + PCI_AF_STATUS, &status);
+        if (!(status & PCI_AF_STATUS_TP))
+                goto transaction_done;
+
         msleep(100);
         pci_read_config_byte(dev, cappos + PCI_AF_STATUS, &status);
-        if (status & PCI_AF_STATUS_TP) {
-                dev_info(&dev->dev, "Busy after 100ms while trying to"
-                                " reset; sleeping for 1 second\n");
-                ssleep(1);
-                pci_read_config_byte(dev,
-                                cappos + PCI_AF_STATUS, &status);
-                if (status & PCI_AF_STATUS_TP)
-                        dev_info(&dev->dev, "Still busy after 1s; "
-                                        "proceeding with reset anyway\n");
-        }
+        if (!(status & PCI_AF_STATUS_TP))
+                goto transaction_done;
+
+        dev_info(&dev->dev, "Busy after 100ms while trying to"
+                        " reset; sleeping for 1 second\n");
+        ssleep(1);
+        pci_read_config_byte(dev, cappos + PCI_AF_STATUS, &status);
+        if (status & PCI_AF_STATUS_TP)
+                dev_info(&dev->dev, "Still busy after 1s; "
+                                "proceeding with reset anyway\n");
+
+transaction_done:
         pci_write_config_byte(dev, cappos + PCI_AF_CTRL, PCI_AF_CTRL_FLR);
         mdelay(100);
 
@@ -2334,18 +2358,140 @@ int pci_select_bars(struct pci_dev *dev, unsigned long flags)
  */
 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
 {
+        int reg;
+
         if (resno < PCI_ROM_RESOURCE) {
                 *type = pci_bar_unknown;
                 return PCI_BASE_ADDRESS_0 + 4 * resno;
         } else if (resno == PCI_ROM_RESOURCE) {
                 *type = pci_bar_mem32;
                 return dev->rom_base_reg;
+        } else if (resno < PCI_BRIDGE_RESOURCES) {
+                /* device specific resource */
+                reg = pci_iov_resource_bar(dev, resno, type);
+                if (reg)
+                        return reg;
         }
 
         dev_err(&dev->dev, "BAR: invalid resource #%d\n", resno);
         return 0;
 }
 
+#define RESOURCE_ALIGNMENT_PARAM_SIZE COMMAND_LINE_SIZE
+static char resource_alignment_param[RESOURCE_ALIGNMENT_PARAM_SIZE] = {0};
+spinlock_t resource_alignment_lock = SPIN_LOCK_UNLOCKED;
+
+/**
+ * pci_specified_resource_alignment - get resource alignment specified by user.
+ * @dev: the PCI device to get
+ *
+ * RETURNS: Resource alignment if it is specified.
+ *          Zero if it is not specified.
+ */
+resource_size_t pci_specified_resource_alignment(struct pci_dev *dev)
+{
+        int seg, bus, slot, func, align_order, count;
+        resource_size_t align = 0;
+        char *p;
+
+        spin_lock(&resource_alignment_lock);
+        p = resource_alignment_param;
+        while (*p) {
+                count = 0;
+                if (sscanf(p, "%d%n", &align_order, &count) == 1 &&
+                                                        p[count] == '@') {
+                        p += count + 1;
+                } else {
+                        align_order = -1;
+                }
+                if (sscanf(p, "%x:%x:%x.%x%n",
+                        &seg, &bus, &slot, &func, &count) != 4) {
+                        seg = 0;
+                        if (sscanf(p, "%x:%x.%x%n",
+                                        &bus, &slot, &func, &count) != 3) {
+                                /* Invalid format */
+                                printk(KERN_ERR "PCI: Can't parse resource_alignment parameter: %s\n",
+                                        p);
+                                break;
+                        }
+                }
+                p += count;
+                if (seg == pci_domain_nr(dev->bus) &&
+                        bus == dev->bus->number &&
+                        slot == PCI_SLOT(dev->devfn) &&
+                        func == PCI_FUNC(dev->devfn)) {
+                        if (align_order == -1) {
+                                align = PAGE_SIZE;
+                        } else {
+                                align = 1 << align_order;
+                        }
+                        /* Found */
+                        break;
+                }
+                if (*p != ';' && *p != ',') {
+                        /* End of param or invalid format */
+                        break;
+                }
+                p++;
+        }
+        spin_unlock(&resource_alignment_lock);
+        return align;
+}
+
+/**
+ * pci_is_reassigndev - check if specified PCI is target device to reassign
+ * @dev: the PCI device to check
+ *
+ * RETURNS: non-zero for PCI device is a target device to reassign,
+ *          or zero is not.
+ */
+int pci_is_reassigndev(struct pci_dev *dev)
+{
+        return (pci_specified_resource_alignment(dev) != 0);
+}
+
+ssize_t pci_set_resource_alignment_param(const char *buf, size_t count)
+{
+        if (count > RESOURCE_ALIGNMENT_PARAM_SIZE - 1)
+                count = RESOURCE_ALIGNMENT_PARAM_SIZE - 1;
+        spin_lock(&resource_alignment_lock);
+        strncpy(resource_alignment_param, buf, count);
+        resource_alignment_param[count] = '\0';
+        spin_unlock(&resource_alignment_lock);
+        return count;
+}
+
+ssize_t pci_get_resource_alignment_param(char *buf, size_t size)
+{
+        size_t count;
+        spin_lock(&resource_alignment_lock);
+        count = snprintf(buf, size, "%s", resource_alignment_param);
+        spin_unlock(&resource_alignment_lock);
+        return count;
+}
+
+static ssize_t pci_resource_alignment_show(struct bus_type *bus, char *buf)
+{
+        return pci_get_resource_alignment_param(buf, PAGE_SIZE);
+}
+
+static ssize_t pci_resource_alignment_store(struct bus_type *bus,
+                                        const char *buf, size_t count)
+{
+        return pci_set_resource_alignment_param(buf, count);
+}
+
+BUS_ATTR(resource_alignment, 0644, pci_resource_alignment_show,
+                                        pci_resource_alignment_store);
+
+static int __init pci_resource_alignment_sysfs_init(void)
+{
+        return bus_create_file(&pci_bus_type,
+                                        &bus_attr_resource_alignment);
+}
+
+late_initcall(pci_resource_alignment_sysfs_init);
+
 static void __devinit pci_no_domains(void)
 {
 #ifdef CONFIG_PCI_DOMAINS
@@ -2394,6 +2540,9 @@ static int __init pci_setup(char *str)
                                 pci_cardbus_io_size = memparse(str + 9, &str);
                         } else if (!strncmp(str, "cbmemsize=", 10)) {
                                 pci_cardbus_mem_size = memparse(str + 10, &str);
+                        } else if (!strncmp(str, "resource_alignment=", 19)) {
+                                pci_set_resource_alignment_param(str + 19,
+                                                        strlen(str + 19));
                         } else {
                                 printk(KERN_ERR "PCI: Unknown option `%s'\n",
                                                 str);