drm/amdgpu: track MQD size for gfx and compute

It varies by generation and we need to know the size
to expose this via debugfs.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -420,6 +420,7 @@ int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
 					return r;
 				}
 
+				ring->mqd_size = mqd_size;
 				/* prepare MQD backup */
 				adev->gfx.me.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 				if (!adev->gfx.me.mqd_backup[i])
@@ -440,6 +441,7 @@ int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
 				return r;
 			}
 
+			ring->mqd_size = mqd_size;
 			/* prepare MQD backup */
 			adev->gfx.mec.mqd_backup[i + xcc_id * adev->gfx.num_compute_rings] = kmalloc(mqd_size, GFP_KERNEL);
 			if (!adev->gfx.mec.mqd_backup[i])

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

@@ -258,6 +258,7 @@ struct amdgpu_ring {
 	struct amdgpu_bo	*mqd_obj;
 	uint64_t                mqd_gpu_addr;
 	void                    *mqd_ptr;
+	unsigned                mqd_size;
 	uint64_t                eop_gpu_addr;
 	u32			doorbell_index;
 	bool			use_doorbell;