There are some capabilities for the device that are interesting to user
apps that are interacting directly with the device. Expose gencap register
in sysfs to allow that information.
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 6ca6e520a2fa..193290a0ff76 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1180,6 +1180,16 @@ static ssize_t op_cap_show(struct device *dev,
}
static DEVICE_ATTR_RO(op_cap);
+static ssize_t gen_cap_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, "%#llx\n", idxd->hw.gen_cap.bits);
+}
+static DEVICE_ATTR_RO(gen_cap);
+
static ssize_t configurable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -1317,6 +1327,7 @@ static struct attribute *idxd_device_attributes[] = {
&dev_attr_max_batch_size.attr,
&dev_attr_max_transfer_size.attr,
&dev_attr_op_cap.attr,
+ &dev_attr_gen_cap.attr,
&dev_attr_configurable.attr,
&dev_attr_clients.attr,
&dev_attr_state.attr,
