1 files changed, 144 insertions, 52 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 02d107b15281..9c6e9bb674ec 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -284,7 +284,6 @@ msi_bus_store(struct device *dev, struct device_attribute *attr,
         return count;
 }
 
-#ifdef CONFIG_HOTPLUG
 static DEFINE_MUTEX(pci_remove_rescan_mutex);
 static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
                                 size_t count)
@@ -377,8 +376,6 @@ dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
         return count;
 }
 
-#endif
-
 #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
 static ssize_t d3cold_allowed_store(struct device *dev,
                                     struct device_attribute *attr,
@@ -404,6 +401,89 @@ static ssize_t d3cold_allowed_show(struct device *dev,
 }
 #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;
+        }
+
+        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 */
+
 struct device_attribute pci_dev_attrs[] = {
         __ATTR_RO(resource),
         __ATTR_RO(vendor),
@@ -424,10 +504,8 @@ struct device_attribute pci_dev_attrs[] = {
         __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),
-#ifdef CONFIG_HOTPLUG
         __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
-#endif
 #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
         __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store),
 #endif
@@ -435,9 +513,7 @@ struct device_attribute pci_dev_attrs[] = {
 };
 
 struct device_attribute pcibus_dev_attrs[] = {
-#ifdef CONFIG_HOTPLUG
         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
-#endif
         __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
         __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
         __ATTR_NULL,
@@ -458,40 +534,6 @@ boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
 }
 struct device_attribute vga_attr = __ATTR_RO(boot_vga);
 
-static void
-pci_config_pm_runtime_get(struct pci_dev *pdev)
-{
-        struct device *dev = &pdev->dev;
-        struct device *parent = dev->parent;
-
-        if (parent)
-                pm_runtime_get_sync(parent);
-        pm_runtime_get_noresume(dev);
-        /*
-         * pdev->current_state is set to PCI_D3cold during suspending,
-         * so wait until suspending completes
-         */
-        pm_runtime_barrier(dev);
-        /*
-         * Only need to resume devices in D3cold, because config
-         * registers are still accessible for devices suspended but
-         * not in D3cold.
-         */
-        if (pdev->current_state == PCI_D3cold)
-                pm_runtime_resume(dev);
-}
-
-static void
-pci_config_pm_runtime_put(struct pci_dev *pdev)
-{
-        struct device *dev = &pdev->dev;
-        struct device *parent = dev->parent;
-
-        pm_runtime_put(dev);
-        if (parent)
-                pm_runtime_put_sync(parent);
-}
-
 static ssize_t
 pci_read_config(struct file *filp, struct kobject *kobj,
                 struct bin_attribute *bin_attr,
@@ -1303,29 +1345,20 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
                 pdev->rom_attr = attr;
         }
 
-        if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
-                retval = device_create_file(&pdev->dev, &vga_attr);
-                if (retval)
-                        goto err_rom_file;
-        }
-
         /* add platform-specific attributes */
         retval = pcibios_add_platform_entries(pdev);
         if (retval)
-                goto err_vga_file;
+                goto err_rom_file;
 
         /* add sysfs entries for various capabilities */
         retval = pci_create_capabilities_sysfs(pdev);
         if (retval)
-                goto err_vga_file;
+                goto err_rom_file;
 
         pci_create_firmware_label_files(pdev);
 
         return 0;
 
-err_vga_file:
-        if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
-                device_remove_file(&pdev->dev, &vga_attr);
 err_rom_file:
         if (rom_size) {
                 sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
@@ -1411,3 +1444,62 @@ static int __init pci_sysfs_init(void)
 }
 
 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;
+}
+
+#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,
+#ifdef CONFIG_PCI_IOV
+        &sriov_dev_attr_group,
+#endif
+        NULL,
+};
+
+struct device_type pci_dev_type = {
+        .groups = pci_dev_attr_groups,
+};