1 files changed, 1066 insertions, 202 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 8dcf1458aa2..9ff0a901ecf 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -10,17 +10,26 @@
  *
  * File attributes for PCI devices
  *
- * Modeled after usb's driverfs.c 
+ * Modeled after usb's driverfs.c
  *
  */
 
 
 #include <linux/kernel.h>
+#include <linux/sched.h>
 #include <linux/pci.h>
 #include <linux/stat.h>
+#include <linux/export.h>
 #include <linux/topology.h>
 #include <linux/mm.h>
+#include <linux/fs.h>
 #include <linux/capability.h>
+#include <linux/security.h>
+#include <linux/pci-aspm.h>
+#include <linux/slab.h>
+#include <linux/vgaarb.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
 #include "pci.h"
 
 static int sysfs_initialized;	/* = 0 */
@@ -32,9 +41,10 @@ field##_show(struct device *dev, struct device_attribute *attr, char *buf)				\
 {									\
 	struct pci_dev *pdev;						\
 									\
-	pdev = to_pci_dev (dev);					\
-	return sprintf (buf, format_string, pdev->field);		\
-}
+	pdev = to_pci_dev(dev);						\
+	return sprintf(buf, format_string, pdev->field);		\
+}									\
+static DEVICE_ATTR_RO(field)
 
 pci_config_attr(vendor, "0x%04x\n");
 pci_config_attr(device, "0x%04x\n");
@@ -48,7 +58,7 @@ static ssize_t broken_parity_status_show(struct device *dev,
 					 char *buf)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
-	return sprintf (buf, "%u\n", pdev->broken_parity_status);
+	return sprintf(buf, "%u\n", pdev->broken_parity_status);
 }
 
 static ssize_t broken_parity_status_store(struct device *dev,
@@ -56,52 +66,114 @@ static ssize_t broken_parity_status_store(struct device *dev,
 					  const char *buf, size_t count)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
-	ssize_t consumed = -EINVAL;
+	unsigned long val;
 
-	if ((count > 0) && (*buf == '0' || *buf == '1')) {
-		pdev->broken_parity_status = *buf == '1' ? 1 : 0;
-		consumed = count;
-	}
-	return consumed;
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	pdev->broken_parity_status = !!val;
+
+	return count;
 }
+static DEVICE_ATTR_RW(broken_parity_status);
 
-static ssize_t local_cpus_show(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{		
-	cpumask_t mask;
+static ssize_t pci_dev_show_local_cpu(struct device *dev, int type,
+				      struct device_attribute *attr, char *buf)
+{
+	const struct cpumask *mask;
 	int len;
 
-	mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);
-	len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
-	strcat(buf,"\n"); 
-	return 1+len;
+#ifdef CONFIG_NUMA
+	mask = (dev_to_node(dev) == -1) ? cpu_online_mask :
+					  cpumask_of_node(dev_to_node(dev));
+#else
+	mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
+#endif
+	len = type ?
+		cpumask_scnprintf(buf, PAGE_SIZE-2, mask) :
+		cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
+
+	buf[len++] = '\n';
+	buf[len] = '\0';
+	return len;
+}
+
+static ssize_t local_cpus_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	return pci_dev_show_local_cpu(dev, 1, attr, buf);
+}
+static DEVICE_ATTR_RO(local_cpus);
+
+static ssize_t local_cpulist_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	return pci_dev_show_local_cpu(dev, 0, attr, buf);
+}
+static DEVICE_ATTR_RO(local_cpulist);
+
+/*
+ * PCI Bus Class Devices
+ */
+static ssize_t pci_bus_show_cpuaffinity(struct device *dev, int type,
+					struct device_attribute *attr,
+					char *buf)
+{
+	int ret;
+	const struct cpumask *cpumask;
+
+	cpumask = cpumask_of_pcibus(to_pci_bus(dev));
+	ret = type ?
+		cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
+		cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
+	buf[ret++] = '\n';
+	buf[ret] = '\0';
+	return ret;
+}
+
+static ssize_t cpuaffinity_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
 }
+static DEVICE_ATTR_RO(cpuaffinity);
+
+static ssize_t cpulistaffinity_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
+}
+static DEVICE_ATTR_RO(cpulistaffinity);
 
 /* show resources */
-static ssize_t
-resource_show(struct device * dev, struct device_attribute *attr, char * buf)
+static ssize_t resource_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
 {
-	struct pci_dev * pci_dev = to_pci_dev(dev);
-	char * str = buf;
+	struct pci_dev *pci_dev = to_pci_dev(dev);
+	char *str = buf;
 	int i;
-	int max = 7;
+	int max;
 	resource_size_t start, end;
 
 	if (pci_dev->subordinate)
 		max = DEVICE_COUNT_RESOURCE;
+	else
+		max = PCI_BRIDGE_RESOURCES;
 
 	for (i = 0; i < max; i++) {
 		struct resource *res =  &pci_dev->resource[i];
 		pci_resource_to_user(pci_dev, i, res, &start, &end);
-		str += sprintf(str,"0x%016llx 0x%016llx 0x%016llx\n",
+		str += sprintf(str, "0x%016llx 0x%016llx 0x%016llx\n",
 			       (unsigned long long)start,
 			       (unsigned long long)end,
 			       (unsigned long long)res->flags);
 	}
 	return (str - buf);
 }
+static DEVICE_ATTR_RO(resource);
 
-static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 
@@ -111,122 +183,455 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 		       (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
 		       (u8)(pci_dev->class));
 }
+static DEVICE_ATTR_RO(modalias);
 
-static ssize_t is_enabled_store(struct device *dev,
-				struct device_attribute *attr, const char *buf,
-				size_t count)
+static ssize_t enabled_store(struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t count)
 {
-	ssize_t result = -EINVAL;
 	struct pci_dev *pdev = to_pci_dev(dev);
+	unsigned long val;
+	ssize_t result = kstrtoul(buf, 0, &val);
+
+	if (result < 0)
+		return result;
 
 	/* this can crash the machine when done on the "wrong" device */
 	if (!capable(CAP_SYS_ADMIN))
-		return count;
+		return -EPERM;
 
-	if (*buf == '0') {
-		if (atomic_read(&pdev->enable_cnt) != 0)
+	if (!val) {
+		if (pci_is_enabled(pdev))
 			pci_disable_device(pdev);
 		else
 			result = -EIO;
-	} else if (*buf == '1')
+	} else
 		result = pci_enable_device(pdev);
 
 	return result < 0 ? result : count;
 }
 
-static ssize_t is_enabled_show(struct device *dev,
-			       struct device_attribute *attr, char *buf)
+static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
 {
 	struct pci_dev *pdev;
 
-	pdev = to_pci_dev (dev);
-	return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
+	pdev = to_pci_dev(dev);
+	return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt));
 }
+static DEVICE_ATTR_RW(enabled);
 
 #ifdef CONFIG_NUMA
-static ssize_t
-numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
+			      char *buf)
 {
-	return sprintf (buf, "%d\n", dev->numa_node);
+	return sprintf(buf, "%d\n", dev->numa_node);
 }
+static DEVICE_ATTR_RO(numa_node);
 #endif
 
-static ssize_t
-msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t dma_mask_bits_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	return sprintf(buf, "%d\n", fls64(pdev->dma_mask));
+}
+static DEVICE_ATTR_RO(dma_mask_bits);
+
+static ssize_t consistent_dma_mask_bits_show(struct device *dev,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	return sprintf(buf, "%d\n", fls64(dev->coherent_dma_mask));
+}
+static DEVICE_ATTR_RO(consistent_dma_mask_bits);
+
+static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 
 	if (!pdev->subordinate)
 		return 0;
 
-	return sprintf (buf, "%u\n",
-			!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
+	return sprintf(buf, "%u\n",
+		       !(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI));
 }
 
-static ssize_t
-msi_bus_store(struct device *dev, struct device_attribute *attr,
-	      const char *buf, size_t count)
+static ssize_t msi_bus_store(struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t count)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
+	unsigned long val;
+
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
 
-	/* bad things may happen if the no_msi flag is changed
-	 * while some drivers are loaded */
+	/*
+	 * Bad things may happen if the no_msi flag is changed
+	 * while drivers are loaded.
+	 */
 	if (!capable(CAP_SYS_ADMIN))
-		return count;
+		return -EPERM;
 
+	/*
+	 * Maybe devices without subordinate buses shouldn't have this
+	 * attribute in the first place?
+	 */
 	if (!pdev->subordinate)
 		return count;
 
-	if (*buf == '0') {
-		pdev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
-		dev_warn(&pdev->dev, "forced subordinate bus to not support MSI,"
-			 " bad things could happen.\n");
+	/* Is the flag going to change, or keep the value it already had? */
+	if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^
+	    !!val) {
+		pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
+
+		dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI, bad things could happen\n",
+			 val ? "" : " not");
+	}
+
+	return count;
+}
+static DEVICE_ATTR_RW(msi_bus);
+
+static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
+				size_t count)
+{
+	unsigned long val;
+	struct pci_bus *b = NULL;
+
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	if (val) {
+		pci_lock_rescan_remove();
+		while ((b = pci_find_next_bus(b)) != NULL)
+			pci_rescan_bus(b);
+		pci_unlock_rescan_remove();
+	}
+	return count;
+}
+static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store);
+
+static struct attribute *pci_bus_attrs[] = {
+	&bus_attr_rescan.attr,
+	NULL,
+};
+
+static const struct attribute_group pci_bus_group = {
+	.attrs = pci_bus_attrs,
+};
+
+const struct attribute_group *pci_bus_groups[] = {
+	&pci_bus_group,
+	NULL,
+};
+
+static ssize_t dev_rescan_store(struct device *dev,
+				struct device_attribute *attr, const char *buf,
+				size_t count)
+{
+	unsigned long val;
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	if (val) {
+		pci_lock_rescan_remove();
+		pci_rescan_bus(pdev->bus);
+		pci_unlock_rescan_remove();
+	}
+	return count;
+}
+static struct device_attribute dev_rescan_attr = __ATTR(rescan,
+							(S_IWUSR|S_IWGRP),
+							NULL, dev_rescan_store);
+
+static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	unsigned long val;
+
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	if (val && device_remove_file_self(dev, attr))
+		pci_stop_and_remove_bus_device_locked(to_pci_dev(dev));
+	return count;
+}
+static struct device_attribute dev_remove_attr = __ATTR(remove,
+							(S_IWUSR|S_IWGRP),
+							NULL, remove_store);
+
+static ssize_t dev_bus_rescan_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	unsigned long val;
+	struct pci_bus *bus = to_pci_bus(dev);
+
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	if (val) {
+		pci_lock_rescan_remove();
+		if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
+			pci_rescan_bus_bridge_resize(bus->self);
+		else
+			pci_rescan_bus(bus);
+		pci_unlock_rescan_remove();
+	}
+	return count;
+}
+static DEVICE_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store);
+
+#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
+static ssize_t d3cold_allowed_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	unsigned long val;
+
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	pdev->d3cold_allowed = !!val;
+	pm_runtime_resume(dev);
+
+	return count;
+}
+
+static ssize_t d3cold_allowed_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	return sprintf(buf, "%u\n", pdev->d3cold_allowed);
+}
+static DEVICE_ATTR_RW(d3cold_allowed);
+#endif
+
+#ifdef CONFIG_OF
+static ssize_t devspec_show(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct device_node *np = pci_device_to_OF_node(pdev);
+
+	if (np == NULL || np->full_name == NULL)
+		return 0;
+	return sprintf(buf, "%s", np->full_name);
+}
+static DEVICE_ATTR_RO(devspec);
+#endif
+
+#ifdef CONFIG_PCI_IOV
+static ssize_t sriov_totalvfs_show(struct device *dev,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev));
+}
+
+
+static ssize_t sriov_numvfs_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	return sprintf(buf, "%u\n", pdev->sriov->num_VFs);
+}
+
+/*
+ * num_vfs > 0; number of VFs to enable
+ * num_vfs = 0; disable all VFs
+ *
+ * Note: SRIOV spec doesn't allow partial VF
+ *       disable, so it's all or none.
+ */
+static ssize_t sriov_numvfs_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	int ret;
+	u16 num_vfs;
+
+	ret = kstrtou16(buf, 0, &num_vfs);
+	if (ret < 0)
+		return ret;
+
+	if (num_vfs > pci_sriov_get_totalvfs(pdev))
+		return -ERANGE;
+
+	if (num_vfs == pdev->sriov->num_VFs)
+		return count;		/* no change */
+
+	/* is PF driver loaded w/callback */
+	if (!pdev->driver || !pdev->driver->sriov_configure) {
+		dev_info(&pdev->dev, "Driver doesn't support SRIOV configuration via sysfs\n");
+		return -ENOSYS;
+	}
+
+	if (num_vfs == 0) {
+		/* disable VFs */
+		ret = pdev->driver->sriov_configure(pdev, 0);
+		if (ret < 0)
+			return ret;
+		return count;
+	}
+
+	/* enable VFs */
+	if (pdev->sriov->num_VFs) {
+		dev_warn(&pdev->dev, "%d VFs already enabled. Disable before enabling %d VFs\n",
+			 pdev->sriov->num_VFs, num_vfs);
+		return -EBUSY;
 	}
 
-	if (*buf == '1') {
-		pdev->subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI;
-		dev_warn(&pdev->dev, "forced subordinate bus to support MSI,"
-			 " bad things could happen.\n");
+	ret = pdev->driver->sriov_configure(pdev, num_vfs);
+	if (ret < 0)
+		return ret;
+
+	if (ret != num_vfs)
+		dev_warn(&pdev->dev, "%d VFs requested; only %d enabled\n",
+			 num_vfs, ret);
+
+	return count;
+}
+
+static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs);
+static struct device_attribute sriov_numvfs_attr =
+		__ATTR(sriov_numvfs, (S_IRUGO|S_IWUSR|S_IWGRP),
+		       sriov_numvfs_show, sriov_numvfs_store);
+#endif /* CONFIG_PCI_IOV */
+
+static ssize_t driver_override_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	char *driver_override, *old = pdev->driver_override, *cp;
+
+	if (count > PATH_MAX)
+		return -EINVAL;
+
+	driver_override = kstrndup(buf, count, GFP_KERNEL);
+	if (!driver_override)
+		return -ENOMEM;
+
+	cp = strchr(driver_override, '\n');
+	if (cp)
+		*cp = '\0';
+
+	if (strlen(driver_override)) {
+		pdev->driver_override = driver_override;
+	} else {
+		kfree(driver_override);
+		pdev->driver_override = NULL;
 	}
 
+	kfree(old);
+
 	return count;
 }
 
-struct device_attribute pci_dev_attrs[] = {
-	__ATTR_RO(resource),
-	__ATTR_RO(vendor),
-	__ATTR_RO(device),
-	__ATTR_RO(subsystem_vendor),
-	__ATTR_RO(subsystem_device),
-	__ATTR_RO(class),
-	__ATTR_RO(irq),
-	__ATTR_RO(local_cpus),
-	__ATTR_RO(modalias),
+static ssize_t driver_override_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	return sprintf(buf, "%s\n", pdev->driver_override);
+}
+static DEVICE_ATTR_RW(driver_override);
+
+static struct attribute *pci_dev_attrs[] = {
+	&dev_attr_resource.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_device.attr,
+	&dev_attr_subsystem_vendor.attr,
+	&dev_attr_subsystem_device.attr,
+	&dev_attr_class.attr,
+	&dev_attr_irq.attr,
+	&dev_attr_local_cpus.attr,
+	&dev_attr_local_cpulist.attr,
+	&dev_attr_modalias.attr,
 #ifdef CONFIG_NUMA
-	__ATTR_RO(numa_node),
+	&dev_attr_numa_node.attr,
 #endif
-	__ATTR(enable, 0600, is_enabled_show, is_enabled_store),
-	__ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
-		broken_parity_status_show,broken_parity_status_store),
-	__ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
-	__ATTR_NULL,
+	&dev_attr_dma_mask_bits.attr,
+	&dev_attr_consistent_dma_mask_bits.attr,
+	&dev_attr_enabled.attr,
+	&dev_attr_broken_parity_status.attr,
+	&dev_attr_msi_bus.attr,
+#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
+	&dev_attr_d3cold_allowed.attr,
+#endif
+#ifdef CONFIG_OF
+	&dev_attr_devspec.attr,
+#endif
+	&dev_attr_driver_override.attr,
+	NULL,
+};
+
+static const struct attribute_group pci_dev_group = {
+	.attrs = pci_dev_attrs,
+};
+
+const struct attribute_group *pci_dev_groups[] = {
+	&pci_dev_group,
+	NULL,
+};
+
+static struct attribute *pcibus_attrs[] = {
+	&dev_attr_rescan.attr,
+	&dev_attr_cpuaffinity.attr,
+	&dev_attr_cpulistaffinity.attr,
+	NULL,
+};
+
+static const struct attribute_group pcibus_group = {
+	.attrs = pcibus_attrs,
+};
+
+const struct attribute_group *pcibus_groups[] = {
+	&pcibus_group,
+	NULL,
 };
 
-static ssize_t
-pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
-		char *buf, loff_t off, size_t count)
+static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
 {
-	struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct pci_dev *vga_dev = vga_default_device();
+
+	if (vga_dev)
+		return sprintf(buf, "%u\n", (pdev == vga_dev));
+
+	return sprintf(buf, "%u\n",
+		!!(pdev->resource[PCI_ROM_RESOURCE].flags &
+		   IORESOURCE_ROM_SHADOW));
+}
+static struct device_attribute vga_attr = __ATTR_RO(boot_vga);
+
+static ssize_t pci_read_config(struct file *filp, struct kobject *kobj,
+			       struct bin_attribute *bin_attr, char *buf,
+			       loff_t off, size_t count)
+{
+	struct pci_dev *dev = to_pci_dev(container_of(kobj, struct device,
+						      kobj));
 	unsigned int size = 64;
 	loff_t init_off = off;
-	u8 *data = (u8*) buf;
+	u8 *data = (u8 *) buf;
 
 	/* Several chips lock up trying to read undefined config space */
-	if (capable(CAP_SYS_ADMIN)) {
+	if (security_capable(filp->f_cred, &init_user_ns, CAP_SYS_ADMIN) == 0)
 		size = dev->cfg_size;
-	} else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
+	else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
 		size = 128;
-	}
 
 	if (off > size)
 		return 0;
@@ -237,6 +642,8 @@ pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
 		size = count;
 	}
 
+	pci_config_pm_runtime_get(dev);
+
 	if ((off & 1) && size) {
 		u8 val;
 		pci_user_read_config_byte(dev, off, &val);
@@ -282,17 +689,20 @@ pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
 		--size;
 	}
 
+	pci_config_pm_runtime_put(dev);
+
 	return count;
 }
 
-static ssize_t
-pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
-		 char *buf, loff_t off, size_t count)
+static ssize_t pci_write_config(struct file *filp, struct kobject *kobj,
+				struct bin_attribute *bin_attr, char *buf,
+				loff_t off, size_t count)
 {
-	struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
+	struct pci_dev *dev = to_pci_dev(container_of(kobj, struct device,
+						      kobj));
 	unsigned int size = count;
 	loff_t init_off = off;
-	u8 *data = (u8*) buf;
+	u8 *data = (u8 *) buf;
 
 	if (off > dev->cfg_size)
 		return 0;
@@ -300,20 +710,22 @@ pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
 		size = dev->cfg_size - off;
 		count = size;
 	}
-	
+
+	pci_config_pm_runtime_get(dev);
+
 	if ((off & 1) && size) {
 		pci_user_write_config_byte(dev, off, data[off - init_off]);
 		off++;
 		size--;
 	}
-	
+
 	if ((off & 3) && size > 2) {
 		u16 val = data[off - init_off];
 		val |= (u16) data[off - init_off + 1] << 8;
-                pci_user_write_config_word(dev, off, val);
-                off += 2;
-                size -= 2;
-        }
+		pci_user_write_config_word(dev, off, val);
+		off += 2;
+		size -= 2;
+	}
 
 	while (size > 3) {
 		u32 val = data[off - init_off];
@@ -324,7 +736,7 @@ pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
 		off += 4;
 		size -= 4;
 	}
-	
+
 	if (size >= 2) {
 		u16 val = data[off - init_off];
 		val |= (u16) data[off - init_off + 1] << 8;
@@ -339,13 +751,47 @@ pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
 		--size;
 	}
 
+	pci_config_pm_runtime_put(dev);
+
 	return count;
 }
 
+static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
+			     struct bin_attribute *bin_attr, char *buf,
+			     loff_t off, size_t count)
+{
+	struct pci_dev *dev =
+		to_pci_dev(container_of(kobj, struct device, kobj));
+
+	if (off > bin_attr->size)
+		count = 0;
+	else if (count > bin_attr->size - off)
+		count = bin_attr->size - off;
+
+	return pci_read_vpd(dev, off, count, buf);
+}
+
+static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
+			      struct bin_attribute *bin_attr, char *buf,
+			      loff_t off, size_t count)
+{
+	struct pci_dev *dev =
+		to_pci_dev(container_of(kobj, struct device, kobj));
+
+	if (off > bin_attr->size)
+		count = 0;
+	else if (count > bin_attr->size - off)
+		count = bin_attr->size - off;
+
+	return pci_write_vpd(dev, off, count, buf);
+}
+
 #ifdef HAVE_PCI_LEGACY
 /**
  * pci_read_legacy_io - read byte(s) from legacy I/O port space
+ * @filp: open sysfs file
  * @kobj: kobject corresponding to file to read from
+ * @bin_attr: struct bin_attribute for this file
  * @buf: buffer to store results
  * @off: offset into legacy I/O port space
  * @count: number of bytes to read
@@ -353,24 +799,25 @@ pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
  * Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific
  * callback routine (pci_legacy_read).
  */
-ssize_t
-pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
-		   char *buf, loff_t off, size_t count)
+static ssize_t pci_read_legacy_io(struct file *filp, struct kobject *kobj,
+				  struct bin_attribute *bin_attr, char *buf,
+				  loff_t off, size_t count)
 {
-        struct pci_bus *bus = to_pci_bus(container_of(kobj,
-                                                      struct device,
+	struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device,
 						      kobj));
 
-        /* Only support 1, 2 or 4 byte accesses */
-        if (count != 1 && count != 2 && count != 4)
-                return -EINVAL;
+	/* Only support 1, 2 or 4 byte accesses */
+	if (count != 1 && count != 2 && count != 4)
+		return -EINVAL;
 
-        return pci_legacy_read(bus, off, (u32 *)buf, count);
+	return pci_legacy_read(bus, off, (u32 *)buf, count);
 }
 
 /**
  * pci_write_legacy_io - write byte(s) to legacy I/O port space
+ * @filp: open sysfs file
  * @kobj: kobject corresponding to file to read from
+ * @bin_attr: struct bin_attribute for this file
  * @buf: buffer containing value to be written
  * @off: offset into legacy I/O port space
  * @count: number of bytes to write
@@ -378,59 +825,175 @@ pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
  * Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
  * callback routine (pci_legacy_write).
  */
-ssize_t
-pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
-		    char *buf, loff_t off, size_t count)
+static ssize_t pci_write_legacy_io(struct file *filp, struct kobject *kobj,
+				   struct bin_attribute *bin_attr, char *buf,
+				   loff_t off, size_t count)
 {
-        struct pci_bus *bus = to_pci_bus(container_of(kobj,
-						      struct device,
+	struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device,
 						      kobj));
-        /* Only support 1, 2 or 4 byte accesses */
-        if (count != 1 && count != 2 && count != 4)
-                return -EINVAL;
 
-        return pci_legacy_write(bus, off, *(u32 *)buf, count);
+	/* Only support 1, 2 or 4 byte accesses */
+	if (count != 1 && count != 2 && count != 4)
+		return -EINVAL;
+
+	return pci_legacy_write(bus, off, *(u32 *)buf, count);
 }
 
 /**
  * pci_mmap_legacy_mem - map legacy PCI memory into user memory space
+ * @filp: open sysfs file
  * @kobj: kobject corresponding to device to be mapped
  * @attr: struct bin_attribute for this file
  * @vma: struct vm_area_struct passed to mmap
  *
- * Uses an arch specific callback, pci_mmap_legacy_page_range, to mmap
+ * Uses an arch specific callback, pci_mmap_legacy_mem_page_range, to mmap
  * legacy memory space (first meg of bus space) into application virtual
  * memory space.
  */
-int
-pci_mmap_legacy_mem(struct kobject *kobj, struct bin_attribute *attr,
-                    struct vm_area_struct *vma)
+static int pci_mmap_legacy_mem(struct file *filp, struct kobject *kobj,
+			       struct bin_attribute *attr,
+			       struct vm_area_struct *vma)
 {
-        struct pci_bus *bus = to_pci_bus(container_of(kobj,
-                                                      struct device,
+	struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device,
 						      kobj));
 
-        return pci_mmap_legacy_page_range(bus, vma);
+	return pci_mmap_legacy_page_range(bus, vma, pci_mmap_mem);
+}
+
+/**
+ * pci_mmap_legacy_io - map legacy PCI IO into user memory space
+ * @filp: open sysfs file
+ * @kobj: kobject corresponding to device to be mapped
+ * @attr: struct bin_attribute for this file
+ * @vma: struct vm_area_struct passed to mmap
+ *
+ * Uses an arch specific callback, pci_mmap_legacy_io_page_range, to mmap
+ * legacy IO space (first meg of bus space) into application virtual
+ * memory space. Returns -ENOSYS if the operation isn't supported
+ */
+static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,
+			      struct bin_attribute *attr,
+			      struct vm_area_struct *vma)
+{
+	struct pci_bus *bus = to_pci_bus(container_of(kobj, struct device,
+						      kobj));
+
+	return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
+}
+
+/**
+ * pci_adjust_legacy_attr - adjustment of legacy file attributes
+ * @b: bus to create files under
+ * @mmap_type: I/O port or memory
+ *
+ * Stub implementation. Can be overridden by arch if necessary.
+ */
+void __weak pci_adjust_legacy_attr(struct pci_bus *b,
+				   enum pci_mmap_state mmap_type)
+{
+}
+
+/**
+ * pci_create_legacy_files - create legacy I/O port and memory files
+ * @b: bus to create files under
+ *
+ * Some platforms allow access to legacy I/O port and ISA memory space on
+ * a per-bus basis.  This routine creates the files and ties them into
+ * their associated read, write and mmap files from pci-sysfs.c
+ *
+ * On error unwind, but don't propagate the error to the caller
+ * as it is ok to set up the PCI bus without these files.
+ */
+void pci_create_legacy_files(struct pci_bus *b)
+{
+	int error;
+
+	b->legacy_io = kzalloc(sizeof(struct bin_attribute) * 2,
+			       GFP_ATOMIC);
+	if (!b->legacy_io)
+		goto kzalloc_err;
+
+	sysfs_bin_attr_init(b->legacy_io);
+	b->legacy_io->attr.name = "legacy_io";
+	b->legacy_io->size = 0xffff;
+	b->legacy_io->attr.mode = S_IRUSR | S_IWUSR;
+	b->legacy_io->read = pci_read_legacy_io;
+	b->legacy_io->write = pci_write_legacy_io;
+	b->legacy_io->mmap = pci_mmap_legacy_io;
+	pci_adjust_legacy_attr(b, pci_mmap_io);
+	error = device_create_bin_file(&b->dev, b->legacy_io);
+	if (error)
+		goto legacy_io_err;
+
+	/* Allocated above after the legacy_io struct */
+	b->legacy_mem = b->legacy_io + 1;
+	sysfs_bin_attr_init(b->legacy_mem);
+	b->legacy_mem->attr.name = "legacy_mem";
+	b->legacy_mem->size = 1024*1024;
+	b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
+	b->legacy_mem->mmap = pci_mmap_legacy_mem;
+	pci_adjust_legacy_attr(b, pci_mmap_mem);
+	error = device_create_bin_file(&b->dev, b->legacy_mem);
+	if (error)
+		goto legacy_mem_err;
+
+	return;
+
+legacy_mem_err:
+	device_remove_bin_file(&b->dev, b->legacy_io);
+legacy_io_err:
+	kfree(b->legacy_io);
+	b->legacy_io = NULL;
+kzalloc_err:
+	printk(KERN_WARNING "pci: warning: could not create legacy I/O port and ISA memory resources to sysfs\n");
+	return;
+}
+
+void pci_remove_legacy_files(struct pci_bus *b)
+{
+	if (b->legacy_io) {
+		device_remove_bin_file(&b->dev, b->legacy_io);
+		device_remove_bin_file(&b->dev, b->legacy_mem);
+		kfree(b->legacy_io); /* both are allocated here */
+	}
 }
 #endif /* HAVE_PCI_LEGACY */
 
 #ifdef HAVE_PCI_MMAP
+
+int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma,
+		  enum pci_mmap_api mmap_api)
+{
+	unsigned long nr, start, size, pci_start;
+
+	if (pci_resource_len(pdev, resno) == 0)
+		return 0;
+	nr = vma_pages(vma);
+	start = vma->vm_pgoff;
+	size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
+	pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
+			pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
+	if (start >= pci_start && start < pci_start + size &&
+			start + nr <= pci_start + size)
+		return 1;
+	return 0;
+}
+
 /**
  * pci_mmap_resource - map a PCI resource into user memory space
  * @kobj: kobject for mapping
  * @attr: struct bin_attribute for the file being mapped
  * @vma: struct vm_area_struct passed into the mmap
+ * @write_combine: 1 for write_combine mapping
  *
  * Use the regular PCI mapping routines to map a PCI resource into userspace.
- * FIXME: write combining?  maybe automatic for prefetchable regions?
  */
-static int
-pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
-		  struct vm_area_struct *vma)
+static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
+			     struct vm_area_struct *vma, int write_combine)
 {
 	struct pci_dev *pdev = to_pci_dev(container_of(kobj,
 						       struct device, kobj));
-	struct resource *res = (struct resource *)attr->private;
+	struct resource *res = attr->private;
 	enum pci_mmap_state mmap_type;
 	resource_size_t start, end;
 	int i;
@@ -441,6 +1004,15 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
 	if (i >= PCI_ROM_RESOURCE)
 		return -ENODEV;
 
+	if (!pci_mmap_fits(pdev, i, vma, PCI_MMAP_SYSFS)) {
+		WARN(1, "process \"%s\" tried to map 0x%08lx bytes at page 0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
+			current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
+			pci_name(pdev), i,
+			(u64)pci_resource_start(pdev, i),
+			(u64)pci_resource_len(pdev, i));
+		return -EINVAL;
+	}
+
 	/* pci_mmap_page_range() expects the same kind of entry as coming
 	 * from /proc/bus/pci/ which is a "user visible" value. If this is
 	 * different from the resource itself, arch will do necessary fixup.
@@ -449,18 +1021,95 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
 	vma->vm_pgoff += start >> PAGE_SHIFT;
 	mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
 
-	return pci_mmap_page_range(pdev, vma, mmap_type, 0);
+	if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
+		return -EINVAL;
+
+	return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
+}
+
+static int pci_mmap_resource_uc(struct file *filp, struct kobject *kobj,
+				struct bin_attribute *attr,
+				struct vm_area_struct *vma)
+{
+	return pci_mmap_resource(kobj, attr, vma, 0);
+}
+
+static int pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
+				struct bin_attribute *attr,
+				struct vm_area_struct *vma)
+{
+	return pci_mmap_resource(kobj, attr, vma, 1);
+}
+
+static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj,
+			       struct bin_attribute *attr, char *buf,
+			       loff_t off, size_t count, bool write)
+{
+	struct pci_dev *pdev = to_pci_dev(container_of(kobj,
+						       struct device, kobj));
+	struct resource *res = attr->private;
+	unsigned long port = off;
+	int i;
+
+	for (i = 0; i < PCI_ROM_RESOURCE; i++)
+		if (res == &pdev->resource[i])
+			break;
+	if (i >= PCI_ROM_RESOURCE)
+		return -ENODEV;
+
+	port += pci_resource_start(pdev, i);
+
+	if (port > pci_resource_end(pdev, i))
+		return 0;
+
+	if (port + count - 1 > pci_resource_end(pdev, i))
+		return -EINVAL;
+
+	switch (count) {
+	case 1:
+		if (write)
+			outb(*(u8 *)buf, port);
+		else
+			*(u8 *)buf = inb(port);
+		return 1;
+	case 2:
+		if (write)
+			outw(*(u16 *)buf, port);
+		else
+			*(u16 *)buf = inw(port);
+		return 2;
+	case 4:
+		if (write)
+			outl(*(u32 *)buf, port);
+		else
+			*(u32 *)buf = inl(port);
+		return 4;
+	}
+	return -EINVAL;
+}
+
+static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj,
+				    struct bin_attribute *attr, char *buf,
+				    loff_t off, size_t count)
+{
+	return pci_resource_io(filp, kobj, attr, buf, off, count, false);
+}
+
+static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj,
+				     struct bin_attribute *attr, char *buf,
+				     loff_t off, size_t count)
+{
+	return pci_resource_io(filp, kobj, attr, buf, off, count, true);
 }
 
 /**
  * pci_remove_resource_files - cleanup resource files
- * @dev: dev to cleanup
+ * @pdev: dev to cleanup
  *
- * If we created resource files for @dev, remove them from sysfs and
+ * If we created resource files for @pdev, remove them from sysfs and
  * free their resources.
  */
-static void
-pci_remove_resource_files(struct pci_dev *pdev)
+static void pci_remove_resource_files(struct pci_dev *pdev)
 {
 	int i;
 
@@ -472,14 +1121,56 @@ pci_remove_resource_files(struct pci_dev *pdev)
 			sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
 			kfree(res_attr);
 		}
+
+		res_attr = pdev->res_attr_wc[i];
+		if (res_attr) {
+			sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
+			kfree(res_attr);
+		}
 	}
 }
 
+static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
+{
+	/* allocate attribute structure, piggyback attribute name */
+	int name_len = write_combine ? 13 : 10;
+	struct bin_attribute *res_attr;
+	int retval;
+
+	res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
+	if (res_attr) {
+		char *res_attr_name = (char *)(res_attr + 1);
+
+		sysfs_bin_attr_init(res_attr);
+		if (write_combine) {
+			pdev->res_attr_wc[num] = res_attr;
+			sprintf(res_attr_name, "resource%d_wc", num);
+			res_attr->mmap = pci_mmap_resource_wc;
+		} else {
+			pdev->res_attr[num] = res_attr;
+			sprintf(res_attr_name, "resource%d", num);
+			res_attr->mmap = pci_mmap_resource_uc;
+		}
+		if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
+			res_attr->read = pci_read_resource_io;
+			res_attr->write = pci_write_resource_io;
+		}
+		res_attr->attr.name = res_attr_name;
+		res_attr->attr.mode = S_IRUSR | S_IWUSR;
+		res_attr->size = pci_resource_len(pdev, num);
+		res_attr->private = &pdev->resource[num];
+		retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
+	} else
+		retval = -ENOMEM;
+
+	return retval;
+}
+
 /**
  * pci_create_resource_files - create resource files in sysfs for @dev
- * @dev: dev in question
+ * @pdev: dev in question
  *
- * Walk the resources in @dev creating files for each resource available.
+ * Walk the resources in @pdev creating files for each resource available.
  */
 static int pci_create_resource_files(struct pci_dev *pdev)
 {
@@ -488,52 +1179,42 @@ static int pci_create_resource_files(struct pci_dev *pdev)
 
 	/* Expose the PCI resources from this device as files */
 	for (i = 0; i < PCI_ROM_RESOURCE; i++) {
-		struct bin_attribute *res_attr;
 
 		/* skip empty resources */
 		if (!pci_resource_len(pdev, i))
 			continue;
 
-		/* allocate attribute structure, piggyback attribute name */
-		res_attr = kzalloc(sizeof(*res_attr) + 10, GFP_ATOMIC);
-		if (res_attr) {
-			char *res_attr_name = (char *)(res_attr + 1);
-
-			pdev->res_attr[i] = res_attr;
-			sprintf(res_attr_name, "resource%d", i);
-			res_attr->attr.name = res_attr_name;
-			res_attr->attr.mode = S_IRUSR | S_IWUSR;
-			res_attr->size = pci_resource_len(pdev, i);
-			res_attr->mmap = pci_mmap_resource;
-			res_attr->private = &pdev->resource[i];
-			retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
-			if (retval) {
-				pci_remove_resource_files(pdev);
-				return retval;
-			}
-		} else {
-			return -ENOMEM;
+		retval = pci_create_attr(pdev, i, 0);
+		/* for prefetchable resources, create a WC mappable file */
+		if (!retval && pdev->resource[i].flags & IORESOURCE_PREFETCH)
+			retval = pci_create_attr(pdev, i, 1);
+
+		if (retval) {
+			pci_remove_resource_files(pdev);
+			return retval;
 		}
 	}
 	return 0;
 }
 #else /* !HAVE_PCI_MMAP */
-static inline int pci_create_resource_files(struct pci_dev *dev) { return 0; }
-static inline void pci_remove_resource_files(struct pci_dev *dev) { return; }
+int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
+void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
 #endif /* HAVE_PCI_MMAP */
 
 /**
  * pci_write_rom - used to enable access to the PCI ROM display
+ * @filp: sysfs file
  * @kobj: kernel object handle
+ * @bin_attr: struct bin_attribute for this file
  * @buf: user input
  * @off: file offset
  * @count: number of byte in input
  *
  * writing anything except 0 enables it
  */
-static ssize_t
-pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
-	      char *buf, loff_t off, size_t count)
+static ssize_t pci_write_rom(struct file *filp, struct kobject *kobj,
+			     struct bin_attribute *bin_attr, char *buf,
+			     loff_t off, size_t count)
 {
 	struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
 
@@ -547,7 +1228,9 @@ pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
 
 /**
  * pci_read_rom - read a PCI ROM
+ * @filp: sysfs file
  * @kobj: kernel object handle
+ * @bin_attr: struct bin_attribute for this file
  * @buf: where to put the data we read from the ROM
  * @off: file offset
  * @count: number of bytes to read
@@ -555,9 +1238,9 @@ pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
  * Put @count bytes starting at @off into @buf from the ROM in the PCI
  * device corresponding to @kobj.
  */
-static ssize_t
-pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
-	     char *buf, loff_t off, size_t count)
+static ssize_t pci_read_rom(struct file *filp, struct kobject *kobj,
+			    struct bin_attribute *bin_attr, char *buf,
+			    loff_t off, size_t count)
 {
 	struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
 	void __iomem *rom;
@@ -565,21 +1248,21 @@ pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
 
 	if (!pdev->rom_attr_enabled)
 		return -EINVAL;
-	
+
 	rom = pci_map_rom(pdev, &size);	/* size starts out as PCI window size */
-	if (!rom)
-		return 0;
-		
+	if (!rom || !size)
+		return -EIO;
+
 	if (off >= size)
 		count = 0;
 	else {
 		if (off + count > size)
 			count = size - off;
-		
+
 		memcpy_fromio(buf, rom + off, count);
 	}
 	pci_unmap_rom(pdev, rom);
-		
+
 	return count;
 }
 
@@ -588,7 +1271,7 @@ static struct bin_attribute pci_config_attr = {
 		.name = "config",
 		.mode = S_IRUGO | S_IWUSR,
 	},
-	.size = 256,
+	.size = PCI_CFG_SPACE_SIZE,
 	.read = pci_read_config,
 	.write = pci_write_config,
 };
@@ -598,25 +1281,89 @@ static struct bin_attribute pcie_config_attr = {
 		.name = "config",
 		.mode = S_IRUGO | S_IWUSR,
 	},
-	.size = 4096,
+	.size = PCI_CFG_SPACE_EXP_SIZE,
 	.read = pci_read_config,
 	.write = pci_write_config,
 };
 
-int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
+static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
 {
+	struct pci_dev *pdev = to_pci_dev(dev);
+	unsigned long val;
+	ssize_t result = kstrtoul(buf, 0, &val);
+
+	if (result < 0)
+		return result;
+
+	if (val != 1)
+		return -EINVAL;
+
+	result = pci_reset_function(pdev);
+	if (result < 0)
+		return result;
+
+	return count;
+}
+
+static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
+
+static int pci_create_capabilities_sysfs(struct pci_dev *dev)
+{
+	int retval;
+	struct bin_attribute *attr;
+
+	/* If the device has VPD, try to expose it in sysfs. */
+	if (dev->vpd) {
+		attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+		if (!attr)
+			return -ENOMEM;
+
+		sysfs_bin_attr_init(attr);
+		attr->size = dev->vpd->len;
+		attr->attr.name = "vpd";
+		attr->attr.mode = S_IRUSR | S_IWUSR;
+		attr->read = read_vpd_attr;
+		attr->write = write_vpd_attr;
+		retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
+		if (retval) {
+			kfree(attr);
+			return retval;
+		}
+		dev->vpd->attr = attr;
+	}
+
+	/* Active State Power Management */
+	pcie_aspm_create_sysfs_dev_files(dev);
+
+	if (!pci_probe_reset_function(dev)) {
+		retval = device_create_file(&dev->dev, &reset_attr);
+		if (retval)
+			goto error;
+		dev->reset_fn = 1;
+	}
 	return 0;
+
+error:
+	pcie_aspm_remove_sysfs_dev_files(dev);
+	if (dev->vpd && dev->vpd->attr) {
+		sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
+		kfree(dev->vpd->attr);
+	}
+
+	return retval;
 }
 
-int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
+int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 {
-	struct bin_attribute *rom_attr = NULL;
 	int retval;
+	int rom_size = 0;
+	struct bin_attribute *attr;
 
 	if (!sysfs_initialized)
 		return -EACCES;
 
-	if (pdev->cfg_size < 4096)
+	if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
 		retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr);
 	else
 		retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr);
@@ -625,42 +1372,53 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
 
 	retval = pci_create_resource_files(pdev);
 	if (retval)
-		goto err_bin_file;
+		goto err_config_file;
+
+	if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
+		rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+	else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
+		rom_size = 0x20000;
 
 	/* If the device has a ROM, try to expose it in sysfs. */
-	if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
-	    (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
-		rom_attr = kzalloc(sizeof(*rom_attr), GFP_ATOMIC);
-		if (rom_attr) {
-			pdev->rom_attr = rom_attr;
-			rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
-			rom_attr->attr.name = "rom";
-			rom_attr->attr.mode = S_IRUSR;
-			rom_attr->read = pci_read_rom;
-			rom_attr->write = pci_write_rom;
-			retval = sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);
-			if (retval)
-				goto err_rom;
-		} else {
+	if (rom_size) {
+		attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+		if (!attr) {
 			retval = -ENOMEM;
 			goto err_resource_files;
 		}
+		sysfs_bin_attr_init(attr);
+		attr->size = rom_size;
+		attr->attr.name = "rom";
+		attr->attr.mode = S_IRUSR | S_IWUSR;
+		attr->read = pci_read_rom;
+		attr->write = pci_write_rom;
+		retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
+		if (retval) {
+			kfree(attr);
+			goto err_resource_files;
+		}
+		pdev->rom_attr = attr;
 	}
-	/* add platform-specific attributes */
-	if (pcibios_add_platform_entries(pdev))
+
+	/* add sysfs entries for various capabilities */
+	retval = pci_create_capabilities_sysfs(pdev);
+	if (retval)
 		goto err_rom_file;
 
+	pci_create_firmware_label_files(pdev);
+
 	return 0;
 
 err_rom_file:
-	if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
-		sysfs_remove_bin_file(&pdev->dev.kobj, rom_attr);
-err_rom:
-	kfree(rom_attr);
+	if (rom_size) {
+		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
+		kfree(pdev->rom_attr);
+		pdev->rom_attr = NULL;
+	}
 err_resource_files:
 	pci_remove_resource_files(pdev);
-err_bin_file:
-	if (pdev->cfg_size < 4096)
+err_config_file:
+	if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
 		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
 	else
 		sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
@@ -668,6 +1426,20 @@ err:
 	return retval;
 }
 
+static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
+{
+	if (dev->vpd && dev->vpd->attr) {
+		sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
+		kfree(dev->vpd->attr);
+	}
+
+	pcie_aspm_remove_sysfs_dev_files(dev);
+	if (dev->reset_fn) {
+		device_remove_file(&dev->dev, &reset_attr);
+		dev->reset_fn = 0;
+	}
+}
+
 /**
  * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
  * @pdev: device whose entries we should free
@@ -676,22 +1448,32 @@ err:
  */
 void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 {
+	int rom_size = 0;
+
 	if (!sysfs_initialized)
 		return;
 
-	if (pdev->cfg_size < 4096)
+	pci_remove_capabilities_sysfs(pdev);
+
+	if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
 		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
 	else
 		sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr);
 
 	pci_remove_resource_files(pdev);
 
-	if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {
-		if (pdev->rom_attr) {
-			sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
-			kfree(pdev->rom_attr);
-		}
+	if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
+		rom_size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+	else if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
+		rom_size = 0x20000;
+
+	if (rom_size && pdev->rom_attr) {
+		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
+		kfree(pdev->rom_attr);
 	}
+
+	pci_remove_firmware_label_files(pdev);
+
 }
 
 static int __init pci_sysfs_init(void)
@@ -710,5 +1492,87 @@ static int __init pci_sysfs_init(void)
 
 	return 0;
 }
-
 late_initcall(pci_sysfs_init);
+
+static struct attribute *pci_dev_dev_attrs[] = {
+	&vga_attr.attr,
+	NULL,
+};
+
+static umode_t pci_dev_attrs_are_visible(struct kobject *kobj,
+					 struct attribute *a, int n)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	if (a == &vga_attr.attr)
+		if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
+			return 0;
+
+	return a->mode;
+}
+
+static struct attribute *pci_dev_hp_attrs[] = {
+	&dev_remove_attr.attr,
+	&dev_rescan_attr.attr,
+	NULL,
+};
+
+static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj,
+					    struct attribute *a, int n)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	if (pdev->is_virtfn)
+		return 0;
+
+	return a->mode;
+}
+
+static struct attribute_group pci_dev_hp_attr_group = {
+	.attrs = pci_dev_hp_attrs,
+	.is_visible = pci_dev_hp_attrs_are_visible,
+};
+
+#ifdef CONFIG_PCI_IOV
+static struct attribute *sriov_dev_attrs[] = {
+	&sriov_totalvfs_attr.attr,
+	&sriov_numvfs_attr.attr,
+	NULL,
+};
+
+static umode_t sriov_attrs_are_visible(struct kobject *kobj,
+				       struct attribute *a, int n)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+
+	if (!dev_is_pf(dev))
+		return 0;
+
+	return a->mode;
+}
+
+static struct attribute_group sriov_dev_attr_group = {
+	.attrs = sriov_dev_attrs,
+	.is_visible = sriov_attrs_are_visible,
+};
+#endif /* CONFIG_PCI_IOV */
+
+static struct attribute_group pci_dev_attr_group = {
+	.attrs = pci_dev_dev_attrs,
+	.is_visible = pci_dev_attrs_are_visible,
+};
+
+static const struct attribute_group *pci_dev_attr_groups[] = {
+	&pci_dev_attr_group,
+	&pci_dev_hp_attr_group,
+#ifdef CONFIG_PCI_IOV
+	&sriov_dev_attr_group,
+#endif
+	NULL,
+};
+
+struct device_type pci_dev_type = {
+	.groups = pci_dev_attr_groups,
+};