drm/amdgpu/gfx9: put queue resets behind a debug option

Pending extended validation.
Reviewed-and-tested-by: Jiadong Zhu <Jiadong.Zhu@amd.com>
Acked-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c

@@ -1151,6 +1151,10 @@ uint64_t kgd_gfx_v9_hqd_get_pq_addr(struct amdgpu_device *adev,
 	uint32_t low, high;
 	uint64_t queue_addr = 0;
 
+	if (!adev->debug_exp_resets &&
+	    !adev->gfx.num_gfx_rings)
+		return 0;
+
 	kgd_gfx_v9_acquire_queue(adev, pipe_id, queue_id, inst);
 	amdgpu_gfx_rlc_enter_safe_mode(adev, inst);
 

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

@@ -7233,6 +7233,10 @@ static int gfx_v9_0_reset_kcq(struct amdgpu_ring *ring,
 	unsigned long flags;
 	int i, r;
 
+	if (!adev->debug_exp_resets &&
+	    !adev->gfx.num_gfx_rings)
+		return -EINVAL;
+
 	if (amdgpu_sriov_vf(adev))
 		return -EINVAL;
 

drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c

@@ -3052,6 +3052,9 @@ static void gfx_v9_4_3_ring_soft_recovery(struct amdgpu_ring *ring,
 	struct amdgpu_device *adev = ring->adev;
 	uint32_t value = 0;
 
+	if (!adev->debug_exp_resets)
+		return;
+
 	value = REG_SET_FIELD(value, SQ_CMD, CMD, 0x03);
 	value = REG_SET_FIELD(value, SQ_CMD, MODE, 0x01);
 	value = REG_SET_FIELD(value, SQ_CMD, CHECK_VMID, 1);
@@ -3475,6 +3478,9 @@ static int gfx_v9_4_3_reset_kcq(struct amdgpu_ring *ring,
 	unsigned long flags;
 	int r, i;
 
+	if (!adev->debug_exp_resets)
+		return -EINVAL;
+
 	if (amdgpu_sriov_vf(adev))
 		return -EINVAL;