drm/amdgpu/gfx9: create mqd backups

And properly synchronize them with the master during
queue init.

Reviewed-by: monk liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 14f8867..526e038 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -666,7 +666,10 @@ static int gfx_v9_0_compute_mqd_sw_init(struct amdgpu_device *adev)
                        return r;
                }
 
-               /*TODO: prepare MQD backup */
+               /* prepare MQD backup */
+               adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS] = kmalloc(sizeof(struct v9_mqd), GFP_KERNEL);
+               if (!adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS])
+                       dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
        }
 
        /* create MQD for each KCQ */
@@ -681,7 +684,10 @@ static int gfx_v9_0_compute_mqd_sw_init(struct amdgpu_device *adev)
                                return r;
                        }
 
-                       /* TODO: prepare MQD backup */
+                       /* prepare MQD backup */
+                       adev->gfx.mec.mqd_backup[i] = kmalloc(sizeof(struct v9_mqd), GFP_KERNEL);
+                       if (!adev->gfx.mec.mqd_backup[i])
+                               dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
                }
        }
 
@@ -695,10 +701,12 @@ static void gfx_v9_0_compute_mqd_sw_fini(struct amdgpu_device *adev)
 
        for (i = 0; i < adev->gfx.num_compute_rings; i++) {
                ring = &adev->gfx.compute_ring[i];
+               kfree(adev->gfx.mec.mqd_backup[i]);
                amdgpu_bo_free_kernel(&ring->mqd_obj, &ring->mqd_gpu_addr, (void **)&ring->mqd_ptr);
        }
 
        ring = &adev->gfx.kiq.ring;
+       kfree(adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS]);
        amdgpu_bo_free_kernel(&ring->mqd_obj, &ring->mqd_gpu_addr, (void **)&ring->mqd_ptr);
 }
 
@@ -2132,8 +2140,12 @@ static int gfx_v9_0_kiq_init_queue(struct amdgpu_ring *ring)
                soc15_grbm_select(adev, 0, 0, 0, 0);
                mutex_unlock(&adev->srbm_mutex);
 
+               if (adev->gfx.mec.mqd_backup[mqd_idx])
+                       memcpy(adev->gfx.mec.mqd_backup[mqd_idx], mqd, sizeof(*mqd));
        } else { /* for GPU_RESET case */
                /* reset MQD to a clean status */
+               if (adev->gfx.mec.mqd_backup[mqd_idx])
+                       memcpy(mqd, adev->gfx.mec.mqd_backup[mqd_idx], sizeof(*mqd));
 
                /* reset ring buffer */
                ring->wptr = 0;