Some user apps would like to know the hardware version in order to
determine the variation of the hardware. Export the hardware version number
to userspace via sysfs.
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
drivers/dma/idxd/sysfs.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 5fb6b5cafb55..bd05a04d3aa3 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1377,6 +1377,16 @@ static const struct attribute_group *idxd_wq_attribute_groups[] = {
};
/* IDXD device attribs */
+static ssize_t version_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct idxd_device *idxd =
+ container_of(dev, struct idxd_device, conf_dev);
+
+ return sprintf(buf, "%#x\n", idxd->hw.version);
+}
+static DEVICE_ATTR_RO(version);
+
static ssize_t max_work_queues_size_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -1618,6 +1628,7 @@ static ssize_t cdev_major_show(struct device *dev,
static DEVICE_ATTR_RO(cdev_major);
static struct attribute *idxd_device_attributes[] = {
+ &dev_attr_version.attr,
&dev_attr_max_groups.attr,
&dev_attr_max_work_queues.attr,
&dev_attr_max_work_queues_size.attr,
