[PATCH 2/2] pci: Expose offset, stride, and VF device ID via sysfs

[Filippo Sironi]

... to make it easier for userspace applications consumption.

Signed-off-by: Filippo Sironi <sir...@amazon.de>
Cc: linux-...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/pci/pci-sysfs.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 2f3780b50723..f920afe7cff3 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -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_did_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_did);
+}
+
 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_did_attr = __ATTR_RO(sriov_vf_did);
 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);
@@ -1744,6 +1774,9 @@ static 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_did_attr.attr,
        &sriov_drivers_autoprobe_attr.attr,
        NULL,
 };
-- 
2.7.4