[PATCH v2 7/7] drm/xe/uapi: Add a query flag for has_device_atomics_on_smem

[Nirmoy Das]

Add a query flag for xe->info.has_device_atomics_on_smem
as this is platform dependent. This flag can be use to inform
whether DRM_XE_VM_BIND_FLAG_DEVICE_ATOMICS can be effectively
applied for a given platform.

Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
---
 drivers/gpu/drm/xe/xe_query.c | 4 +++-
 include/uapi/drm/xe_drm.h     | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_query.c b/drivers/gpu/drm/xe/xe_query.c
index df407d73e5f5..b8a606698e38 100644
--- a/drivers/gpu/drm/xe/xe_query.c
+++ b/drivers/gpu/drm/xe/xe_query.c
@@ -312,7 +312,7 @@ static int query_mem_regions(struct xe_device *xe,
 
 static int query_config(struct xe_device *xe, struct drm_xe_device_query *query)
 {
-	const u32 num_params = DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY + 1;
+	const u32 num_params = DRM_XE_QUERY_CONFIG_SUPP_DEV_ATOMIC_ON_SMEM + 1;
 	size_t size =
 		sizeof(struct drm_xe_query_config) + num_params * sizeof(u64);
 	struct drm_xe_query_config __user *query_ptr =
@@ -341,6 +341,8 @@ static int query_config(struct xe_device *xe, struct drm_xe_device_query *query)
 	config->info[DRM_XE_QUERY_CONFIG_VA_BITS] = xe->info.va_bits;
 	config->info[DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY] =
 		xe_exec_queue_device_get_max_priority(xe);
+	config->info[DRM_XE_QUERY_CONFIG_SUPP_DEV_ATOMIC_ON_SMEM] =
+		xe->info.has_device_atomics_on_smem;
 
 	if (copy_to_user(query_ptr, config, size)) {
 		kfree(config);
diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h
index a44c057d4471..4804b8a5d028 100644
--- a/include/uapi/drm/xe_drm.h
+++ b/include/uapi/drm/xe_drm.h
@@ -394,6 +394,8 @@ struct drm_xe_query_mem_regions {
  *  - %DRM_XE_QUERY_CONFIG_VA_BITS - Maximum bits of a virtual address
  *  - %DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY - Value of the highest
  *    available exec queue priority
+ *  - %DRM_XE_QUERY_CONFIG_SUPP_DEV_ATOMIC_ON_SMEM - Flag is set if the device
+ *    supports device atomics on system memory
  */
 struct drm_xe_query_config {
 	/** @num_params: number of parameters returned in info */
@@ -408,6 +410,7 @@ struct drm_xe_query_config {
 #define DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT		2
 #define DRM_XE_QUERY_CONFIG_VA_BITS			3
 #define DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY	4
+#define DRM_XE_QUERY_CONFIG_SUPP_DEV_ATOMIC_ON_SMEM	5
 	/** @info: array of elements containing the config info */
 	__u64 info[];
 };
-- 
2.42.0