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path: root/drivers/pci/pci-sysfs.c
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Diffstat (limited to 'drivers/pci/pci-sysfs.c')
-rw-r--r--drivers/pci/pci-sysfs.c179
1 files changed, 161 insertions, 18 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index f39378d9da1..05b78b16d20 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 +401,106 @@ 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 its 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 num_vfs_enabled = 0;
+ int num_vfs;
+ int ret = 0;
+ u16 total;
+
+ if (kstrtoint(buf, 0, &num_vfs) < 0)
+ return -EINVAL;
+
+ /* 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 enabling vf's ... */
+ total = pci_sriov_get_totalvfs(pdev);
+ /* Requested VFs to enable < totalvfs and none enabled already */
+ if ((num_vfs > 0) && (num_vfs <= total)) {
+ if (pdev->sriov->num_VFs == 0) {
+ num_vfs_enabled =
+ pdev->driver->sriov_configure(pdev, num_vfs);
+ if ((num_vfs_enabled >= 0) &&
+ (num_vfs_enabled != num_vfs)) {
+ dev_warn(&pdev->dev,
+ "Only %d VFs enabled\n",
+ num_vfs_enabled);
+ return count;
+ } else if (num_vfs_enabled < 0)
+ /* error code from driver callback */
+ return num_vfs_enabled;
+ } else if (num_vfs == pdev->sriov->num_VFs) {
+ dev_warn(&pdev->dev,
+ "%d VFs already enabled; no enable action taken\n",
+ num_vfs);
+ return count;
+ } else {
+ dev_warn(&pdev->dev,
+ "%d VFs already enabled. Disable before enabling %d VFs\n",
+ pdev->sriov->num_VFs, num_vfs);
+ return -EINVAL;
+ }
+ }
+
+ /* disable vfs */
+ if (num_vfs == 0) {
+ if (pdev->sriov->num_VFs != 0) {
+ ret = pdev->driver->sriov_configure(pdev, 0);
+ return ret ? ret : count;
+ } else {
+ dev_warn(&pdev->dev,
+ "All VFs disabled; no disable action taken\n");
+ return count;
+ }
+ }
+
+ dev_err(&pdev->dev,
+ "Invalid value for number of VFs to enable: %d\n", num_vfs);
+
+ return -EINVAL;
+}
+
+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 +521,8 @@ 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 +530,7 @@ 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,
@@ -1269,29 +1362,20 @@ 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);
@@ -1377,3 +1461,62 @@ 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,
+};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 07:18:14 +0000