drm/amdgpu: detach ring priority from gfx priority

Currently AMDGPU_RING_PRIO_MAX is redefinition of a
max gfx hwip priority, this won't work well when we will
have a hwip with different set of priorities than gfx.
Also, HW ring priorities are different from ring priorities.

Create a global enum for ring priority levels which each
HWIP can use to define its own priority levels.
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c

@@ -109,7 +109,7 @@ static int amdgpu_ctx_priority_permit(struct drm_file *filp,
 	return -EACCES;
 }
 
-static enum gfx_pipe_priority amdgpu_ctx_prio_to_compute_prio(int32_t prio)
+static enum amdgpu_gfx_pipe_priority amdgpu_ctx_prio_to_compute_prio(int32_t prio)
 {
 	switch (prio) {
 	case AMDGPU_CTX_PRIORITY_HIGH:

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h

@@ -42,10 +42,9 @@
 #define AMDGPU_MAX_GFX_QUEUES KGD_MAX_QUEUES
 #define AMDGPU_MAX_COMPUTE_QUEUES KGD_MAX_QUEUES
 
-enum gfx_pipe_priority {
-	AMDGPU_GFX_PIPE_PRIO_NORMAL = 1,
-	AMDGPU_GFX_PIPE_PRIO_HIGH,
-	AMDGPU_GFX_PIPE_PRIO_MAX
+enum amdgpu_gfx_pipe_priority {
+	AMDGPU_GFX_PIPE_PRIO_NORMAL = AMDGPU_RING_PRIO_1,
+	AMDGPU_GFX_PIPE_PRIO_HIGH = AMDGPU_RING_PRIO_2
 };
 
 /* Argument for PPSMC_MSG_GpuChangeState */

drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h

@@ -36,8 +36,13 @@
 #define AMDGPU_MAX_VCE_RINGS		3
 #define AMDGPU_MAX_UVD_ENC_RINGS	2
 
-#define AMDGPU_RING_PRIO_DEFAULT	1
-#define AMDGPU_RING_PRIO_MAX		AMDGPU_GFX_PIPE_PRIO_MAX
+enum amdgpu_ring_priority_level {
+	AMDGPU_RING_PRIO_0,
+	AMDGPU_RING_PRIO_1,
+	AMDGPU_RING_PRIO_DEFAULT = 1,
+	AMDGPU_RING_PRIO_2,
+	AMDGPU_RING_PRIO_MAX
+};
 
 /* some special values for the owner field */
 #define AMDGPU_FENCE_OWNER_UNDEFINED	((void *)0ul)