Commit 7dfca152 authored by Filippo Sironi's avatar Filippo Sironi Committed by Bjorn Helgaas
Browse files

PCI: Expose SR-IOV offset, stride, and VF device ID via sysfs 



Expose the SR-IOV device offset, stride, and VF device ID via sysfs to make
it easier for userspace applications to consume them.

Signed-off-by: default avatarFilippo Sironi <sironi@amazon.de>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 3142d832

drivers/pci/pci-sysfs.c

+33 −0
Original line number Diff line number Diff line
@@ -648,6 +648,33 @@ static ssize_t sriov_numvfs_store(struct device *dev, 
	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)
@@ -676,6 +703,9 @@ 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);

static struct device_attribute sriov_offset_attr = __ATTR_RO(sriov_offset);

static struct device_attribute sriov_stride_attr = __ATTR_RO(sriov_stride);

static struct device_attribute sriov_vf_device_attr = __ATTR_RO(sriov_vf_device);

static struct device_attribute sriov_drivers_autoprobe_attr =

		__ATTR(sriov_drivers_autoprobe, (S_IRUGO|S_IWUSR|S_IWGRP),

		       sriov_drivers_autoprobe_show, sriov_drivers_autoprobe_store);
@@ -1748,6 +1778,9 @@ static const struct attribute_group pci_dev_hp_attr_group = { 
static struct attribute *sriov_dev_attrs[] = {

	&sriov_totalvfs_attr.attr,

	&sriov_numvfs_attr.attr,

	&sriov_offset_attr.attr,

	&sriov_stride_attr.attr,

	&sriov_vf_device_attr.attr,

	&sriov_drivers_autoprobe_attr.attr,

	NULL,

};