[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)

Cc: Oak Zeng <oak.zeng at intel.com>
Cc: Janga Rahul Kumar <janga.rahul.kumar 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          | 5 +++++
 2 files changed, 8 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..8b5e7e212f61 100644
--- a/include/uapi/drm/xe_drm.h
+++ b/include/uapi/drm/xe_drm.h
@@ -126,6 +126,11 @@ struct xe_user_extension {
 #define DRM_IOCTL_XE_WAIT_USER_FENCE		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_WAIT_USER_FENCE, struct drm_xe_wait_user_fence)
 #define DRM_IOCTL_XE_VM_MADVISE			 DRM_IOW(DRM_COMMAND_BASE + DRM_XE_VM_MADVISE, struct drm_xe_vm_madvise)
 
+#define XE_ACC_GRANULARITY_128K 0
+#define XE_ACC_GRANULARITY_2M 1
+#define XE_ACC_GRANULARITY_16M 2
+#define XE_ACC_GRANULARITY_64M 3
+
 /** struct drm_xe_engine_class_instance - instance of an engine class */
 struct drm_xe_engine_class_instance {
 #define DRM_XE_ENGINE_CLASS_RENDER		0
-- 
2.25.1