@@ -1,3 +1,9 @@
+What: sys/bus/dsa/devices/dsa<m>/version
+Date: Apr 15, 2020
+KernelVersion: 5.8.0
+Contact: dmaengine@vger.kernel.org
+Description: The hardware version number.
+
What: sys/bus/dsa/devices/dsa<m>/cdev_major
Date: Oct 25, 2019
KernelVersion: 5.6.0
@@ -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,
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@intel.com> --- v2: Add sysfs ABI documentation (Vinod) Documentation/ABI/stable/sysfs-driver-dma-idxd | 6 ++++++ drivers/dma/idxd/sysfs.c | 11 +++++++++++ 2 files changed, 17 insertions(+)