[v5 3/6] drm/amdgpu: switch amdgpu_sdma_reset_engine to use the new sdma function pointers

[jesse.zh...@amd.com]

From: "jesse.zh...@amd.com" <jesse.zh...@amd.com>

Replace old callback mechanism with direct calls to stop/start functions.

Suggested-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Jesse Zhang <jesse.zh...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 34 +++---------------------
 1 file changed, 4 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
index c3c6f03190c8..7139d574c23e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
@@ -559,16 +559,10 @@ void amdgpu_sdma_register_on_reset_callbacks(struct 
amdgpu_device *adev, struct
  * @adev: Pointer to the AMDGPU device
  * @instance_id: ID of the SDMA engine instance to reset
  *
- * This function performs the following steps:
- * 1. Calls all registered pre_reset callbacks to allow KFD and AMDGPU to save 
their state.
- * 2. Resets the specified SDMA engine instance.
- * 3. Calls all registered post_reset callbacks to allow KFD and AMDGPU to 
restore their state.
- *
  * Returns: 0 on success, or a negative error code on failure.
  */
 int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, uint32_t instance_id)
 {
-       struct sdma_on_reset_funcs *funcs;
        int ret = 0;
        struct amdgpu_sdma_instance *sdma_instance = 
&adev->sdma.instance[instance_id];
        struct amdgpu_ring *gfx_ring = &sdma_instance->ring;
@@ -590,18 +584,8 @@ int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, 
uint32_t instance_id)
                page_sched_stopped = true;
        }
 
-       /* Invoke all registered pre_reset callbacks */
-       list_for_each_entry(funcs, &adev->sdma.reset_callback_list, list) {
-               if (funcs->pre_reset) {
-                       ret = funcs->pre_reset(adev, instance_id);
-                       if (ret) {
-                               dev_err(adev->dev,
-                               "beforeReset callback failed for instance %u: 
%d\n",
-                                       instance_id, ret);
-                               goto exit;
-                       }
-               }
-       }
+       if (sdma_instance->funcs->stop_kernel_queue)
+               sdma_instance->funcs->stop_kernel_queue(gfx_ring);
 
        /* Perform the SDMA reset for the specified instance */
        ret = amdgpu_dpm_reset_sdma(adev, 1 << instance_id);
@@ -610,18 +594,8 @@ int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, 
uint32_t instance_id)
                goto exit;
        }
 
-       /* Invoke all registered post_reset callbacks */
-       list_for_each_entry(funcs, &adev->sdma.reset_callback_list, list) {
-               if (funcs->post_reset) {
-                       ret = funcs->post_reset(adev, instance_id);
-                       if (ret) {
-                               dev_err(adev->dev,
-                               "afterReset callback failed for instance %u: 
%d\n",
-                                       instance_id, ret);
-                               goto exit;
-                       }
-               }
-       }
+       if (sdma_instance->funcs->start_kernel_queue)
+               sdma_instance->funcs->start_kernel_queue(gfx_ring);
 
 exit:
        /* Restart the scheduler's work queue for the GFX and page rings
-- 
2.25.1