From aaee0c1ffd6399d291b030b49d622b81dd5071c5 Mon Sep 17 00:00:00 2001 From: Kelsey Skunberg Date: Tue, 13 Aug 2019 14:45:13 -0600 Subject: PCI/IOV: Move sysfs SR-IOV functions to iov.c The sysfs SR-IOV functions are only needed when the kernel is built with SR-IOV support. Rather than put them in pci-sysfs.c under #ifdef CONFIG_PCI_IOV, move them to iov.c, which is only compiled when CONFIG_PCI_IOV=y. Link: https://lore.kernel.org/r/20190813204513.4790-4-skunberg.kelsey@gmail.com Signed-off-by: Kelsey Skunberg Signed-off-by: Bjorn Helgaas Reviewed-by: Greg Kroah-Hartman Reviewed-by: Donald Dutile Reviewed-by: Kuppuswamy Sathyanarayanan --- drivers/pci/iov.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++ drivers/pci/pci-sysfs.c | 173 ------------------------------------------------ drivers/pci/pci.h | 2 +- 3 files changed, 169 insertions(+), 174 deletions(-) (limited to 'drivers/pci') diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 525fd3f272b3..053054362247 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -240,6 +240,174 @@ void pci_iov_remove_virtfn(struct pci_dev *dev, int id) pci_dev_put(dev); } +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 does not 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; + + device_lock(&pdev->dev); + + if (num_vfs == pdev->sriov->num_VFs) + goto exit; + + /* is PF driver loaded w/callback */ + if (!pdev->driver || !pdev->driver->sriov_configure) { + pci_info(pdev, "Driver does not support SRIOV configuration via sysfs\n"); + ret = -ENOENT; + goto exit; + } + + if (num_vfs == 0) { + /* disable VFs */ + ret = pdev->driver->sriov_configure(pdev, 0); + goto exit; + } + + /* enable VFs */ + if (pdev->sriov->num_VFs) { + pci_warn(pdev, "%d VFs already enabled. Disable before enabling %d VFs\n", + pdev->sriov->num_VFs, num_vfs); + ret = -EBUSY; + goto exit; + } + + ret = pdev->driver->sriov_configure(pdev, num_vfs); + if (ret < 0) + goto exit; + + if (ret != num_vfs) + pci_warn(pdev, "%d VFs requested; only %d enabled\n", + num_vfs, ret); + +exit: + device_unlock(&pdev->dev); + + if (ret < 0) + return ret; + + return count; +} + +static ssize_t sriov_offset_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->offset); +} + +static ssize_t sriov_stride_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->stride); +} + +static ssize_t sriov_vf_device_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return sprintf(buf, "%x\n", pdev->sriov->vf_device); +} + +static ssize_t sriov_drivers_autoprobe_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->drivers_autoprobe); +} + +static ssize_t sriov_drivers_autoprobe_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev); + bool drivers_autoprobe; + + if (kstrtobool(buf, &drivers_autoprobe) < 0) + return -EINVAL; + + pdev->sriov->drivers_autoprobe = drivers_autoprobe; + + return count; +} + +static DEVICE_ATTR_RO(sriov_totalvfs); +static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store); +static DEVICE_ATTR_RO(sriov_offset); +static DEVICE_ATTR_RO(sriov_stride); +static DEVICE_ATTR_RO(sriov_vf_device); +static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show, + sriov_drivers_autoprobe_store); + +static struct attribute *sriov_dev_attrs[] = { + &dev_attr_sriov_totalvfs.attr, + &dev_attr_sriov_numvfs.attr, + &dev_attr_sriov_offset.attr, + &dev_attr_sriov_stride.attr, + &dev_attr_sriov_vf_device.attr, + &dev_attr_sriov_drivers_autoprobe.attr, + NULL, +}; + +static umode_t sriov_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = kobj_to_dev(kobj); + + if (!dev_is_pf(dev)) + return 0; + + return a->mode; +} + +const struct attribute_group sriov_dev_attr_group = { + .attrs = sriov_dev_attrs, + .is_visible = sriov_attrs_are_visible, +}; + int __weak pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) { return 0; diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 5bb301efec98..868e35109284 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -548,151 +548,6 @@ static ssize_t devspec_show(struct device *dev, 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; - - device_lock(&pdev->dev); - - if (num_vfs == pdev->sriov->num_VFs) - goto exit; - - /* is PF driver loaded w/callback */ - if (!pdev->driver || !pdev->driver->sriov_configure) { - pci_info(pdev, "Driver doesn't support SRIOV configuration via sysfs\n"); - ret = -ENOENT; - goto exit; - } - - if (num_vfs == 0) { - /* disable VFs */ - ret = pdev->driver->sriov_configure(pdev, 0); - goto exit; - } - - /* enable VFs */ - if (pdev->sriov->num_VFs) { - pci_warn(pdev, "%d VFs already enabled. Disable before enabling %d VFs\n", - pdev->sriov->num_VFs, num_vfs); - ret = -EBUSY; - goto exit; - } - - ret = pdev->driver->sriov_configure(pdev, num_vfs); - if (ret < 0) - goto exit; - - if (ret != num_vfs) - pci_warn(pdev, "%d VFs requested; only %d enabled\n", - num_vfs, ret); - -exit: - device_unlock(&pdev->dev); - - if (ret < 0) - return ret; - - return count; -} - -static ssize_t sriov_offset_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->offset); -} - -static ssize_t sriov_stride_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->stride); -} - -static ssize_t sriov_vf_device_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct pci_dev *pdev = to_pci_dev(dev); - - return sprintf(buf, "%x\n", pdev->sriov->vf_device); -} - -static ssize_t sriov_drivers_autoprobe_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->drivers_autoprobe); -} - -static ssize_t sriov_drivers_autoprobe_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct pci_dev *pdev = to_pci_dev(dev); - bool drivers_autoprobe; - - if (kstrtobool(buf, &drivers_autoprobe) < 0) - return -EINVAL; - - pdev->sriov->drivers_autoprobe = drivers_autoprobe; - - return count; -} - -static DEVICE_ATTR_RO(sriov_totalvfs); -static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show, sriov_numvfs_store); -static DEVICE_ATTR_RO(sriov_offset); -static DEVICE_ATTR_RO(sriov_stride); -static DEVICE_ATTR_RO(sriov_vf_device); -static DEVICE_ATTR(sriov_drivers_autoprobe, 0664, sriov_drivers_autoprobe_show, - sriov_drivers_autoprobe_store); -#endif /* CONFIG_PCI_IOV */ - static ssize_t driver_override_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -1691,34 +1546,6 @@ static const struct attribute_group pci_dev_hp_attr_group = { .is_visible = pci_dev_hp_attrs_are_visible, }; -#ifdef CONFIG_PCI_IOV -static struct attribute *sriov_dev_attrs[] = { - &dev_attr_sriov_totalvfs.attr, - &dev_attr_sriov_numvfs.attr, - &dev_attr_sriov_offset.attr, - &dev_attr_sriov_stride.attr, - &dev_attr_sriov_vf_device.attr, - &dev_attr_sriov_drivers_autoprobe.attr, - NULL, -}; - -static umode_t sriov_attrs_are_visible(struct kobject *kobj, - struct attribute *a, int n) -{ - struct device *dev = kobj_to_dev(kobj); - - if (!dev_is_pf(dev)) - return 0; - - return a->mode; -} - -static const struct attribute_group sriov_dev_attr_group = { - .attrs = sriov_dev_attrs, - .is_visible = sriov_attrs_are_visible, -}; -#endif /* CONFIG_PCI_IOV */ - static const struct attribute_group pci_dev_attr_group = { .attrs = pci_dev_dev_attrs, .is_visible = pci_dev_attrs_are_visible, diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 1be03a97cb92..061a935ac18e 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -433,7 +433,7 @@ void pci_iov_update_resource(struct pci_dev *dev, int resno); resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); void pci_restore_iov_state(struct pci_dev *dev); int pci_iov_bus_range(struct pci_bus *bus); - +extern const struct attribute_group sriov_dev_attr_group; #else static inline int pci_iov_init(struct pci_dev *dev) { -- cgit v1.2.3