[Intel-xe] [PATCH] drm/xe/xe_exec_queue: Add check for access counter granularity

[priyanka.dandamudi at intel.com]

From: Priyanka Dandamudi <priyanka.dandamudi at intel.com>

Add conditional check for access counter granularity.
This check will return -EINVAL if granularity is beyond 64M
which is a hardware limitation.

v2: Defined
XE_ACC_GRANULARITY_128K 0
XE_ACC_GRANULARITY_2M 1
XE_ACC_GRANULARITY_16M 2
XE_ACC_GRANULARITY_64M 3
as part of uAPI.
So, that user can also use it.(Oak)

v3: Move uAPI to proper location and give proper
documentation.(Brian, Oak)

Cc: Oak Zeng <oak.zeng at intel.com>
Cc: Janga Rahul Kumar <janga.rahul.kumar at intel.com>
Cc: Brian Welty <brian.welty at intel.com>
Signed-off-by: Priyanka Dandamudi <priyanka.dandamudi at intel.com>
Reviewed-by: Oak Zeng <oak.zeng at intel.com>
---
 drivers/gpu/drm/xe/xe_exec_queue.c |  3 +++
 include/uapi/drm/xe_drm.h          | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c
index dd61c4267e24..4fd44a9203e4 100644
--- a/drivers/gpu/drm/xe/xe_exec_queue.c
+++ b/drivers/gpu/drm/xe/xe_exec_queue.c
@@ -393,6 +393,9 @@ static int exec_queue_set_acc_granularity(struct xe_device *xe, struct xe_exec_q
 	if (XE_IOCTL_DBG(xe, !xe->info.supports_usm))
 		return -EINVAL;
 
+	if (value > XE_ACC_GRANULARITY_64M)
+		return -EINVAL;
+
 	q->usm.acc_granularity = value;
 
 	return 0;
diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h
index 24bf8f0f52e8..9bd7092a7ea4 100644
--- a/include/uapi/drm/xe_drm.h
+++ b/include/uapi/drm/xe_drm.h
@@ -731,6 +731,20 @@ struct drm_xe_vm_bind {
 	__u64 reserved[2];
 };
 
+/* For use with XE_EXEC_QUEUE_SET_PROPERTY_ACC_GRANULARITY */
+
+/* Monitor 128KB contiguous region with 4K sub-granularity */
+#define XE_ACC_GRANULARITY_128K 0
+
+/* Monitor 2MB contiguous region with 64KB sub-granularity */
+#define XE_ACC_GRANULARITY_2M 1
+
+/* Monitor 16MB contiguous region with 512KB sub-granularity */
+#define XE_ACC_GRANULARITY_16M 2
+
+/* Monitor 64MB contiguous region with 2M sub-granularity */
+#define XE_ACC_GRANULARITY_64M 3
+
 /**
  * struct drm_xe_exec_queue_set_property - exec queue set property
  *
-- 
2.25.1