drm/amdgpu: add amdgpu.sched_hw_submission option

This option can be used to specify the max number of submissions in the
active HW queue. The default value is 2 now.

Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>

drivers/gpu/drm/amd/scheduler/gpu_scheduler.c

@@ -468,7 +468,8 @@ struct amd_gpu_scheduler *amd_sched_create(void *device,
 					   struct amd_sched_backend_ops *ops,
 					   unsigned ring,
 					   unsigned granularity,
-					   unsigned preemption)
+					   unsigned preemption,
+					   unsigned hw_submission)
 {
 	struct amd_gpu_scheduler *sched;
 	char name[20] = "gpu_sched[0]";
@@ -495,7 +496,7 @@ struct amd_gpu_scheduler *amd_sched_create(void *device,
 
 	init_waitqueue_head(&sched->wait_queue);
 	if(kfifo_alloc(&sched->active_hw_rq,
-		       AMD_MAX_ACTIVE_HW_SUBMISSION * sizeof(void *),
+		       hw_submission * sizeof(void *),
 		       GFP_KERNEL)) {
 		kfree(sched);
 		return NULL;

drivers/gpu/drm/amd/scheduler/gpu_scheduler.h

@@ -26,8 +26,6 @@
 
 #include <linux/kfifo.h>
 
-#define AMD_MAX_ACTIVE_HW_SUBMISSION		2
-
 #define AMD_KERNEL_CONTEXT_ID			0
 #define AMD_KERNEL_PROCESS_ID			0
 
@@ -127,7 +125,8 @@ struct amd_gpu_scheduler *amd_sched_create(void *device,
 				struct amd_sched_backend_ops *ops,
 				uint32_t ring,
 				uint32_t granularity,
-				uint32_t preemption);
+				uint32_t preemption,
+				uint32_t hw_submission);
 
 int amd_sched_destroy(struct amd_gpu_scheduler *sched);