On 4/15/2020 8:59 AM, Vinod Koul wrote:
On 03-04-20, 13:52, Dave Jiang wrote:
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.
Documentation update?
Ah right! Will add that.
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,
