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?
>
> 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,
--
~Vinod
