From: Dave Jiang Date: Wed, 15 Apr 2020 16:13:12 +0000 (-0700) Subject: dmaengine: idxd: export hw version through sysfs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c2ce6bbcfc9f142b426717bc5aa3f9ba20485a65;p=linux.git dmaengine: idxd: export hw version through sysfs 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 Link: https://lore.kernel.org/r/158696714008.39484.13401950732606906479.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul --- diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd index f4be46cc6cb60..b5bebf642db69 100644 --- a/Documentation/ABI/stable/sysfs-driver-dma-idxd +++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd @@ -1,3 +1,9 @@ +What: sys/bus/dsa/devices/dsa/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/cdev_major Date: Oct 25, 2019 KernelVersion: 5.6.0 diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 3999827970aba..052dae5d6dddb 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1092,6 +1092,16 @@ 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) @@ -1313,6 +1323,7 @@ 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,