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authorDave Jiang <dave.jiang@intel.com>2020-02-24 11:01:34 -0700
committerVinod Koul <vkoul@kernel.org>2020-03-02 12:43:49 +0530
commit9065958ee6dd752c7e1bbacbb79fe5f5f2218393 (patch)
tree284a36f172e0cd4409e40df73c954f95271e3b3f /drivers/dma
parentb391554c61cb353c279523a706734b090aaf9000 (diff)
downloadlinux-9065958ee6dd752c7e1bbacbb79fe5f5f2218393.tar.bz2
dmaengine: idxd: expose general capabilities register in sysfs
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@intel.com> Link: https://lore.kernel.org/r/158256729399.55526.10842505054968710547.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/idxd/sysfs.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index e4f35bdf252e..a74e99cb055d 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1160,6 +1160,16 @@ 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)
{
@@ -1297,6 +1307,7 @@ 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,