drm/amdgpu: add a debugfs property to trigger a GPU reset

Ported from similar code in radeon.

Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Ken Wang <Qingqing.Wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index 988a32d578a098e27f93935da6b526ccc1171ca2..08963fc83168623df173f616a6c566653d677db5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
@@ -734,15 +734,33 @@ static int amdgpu_debugfs_fence_info(struct seq_file *m, void *data)
        return 0;
 }
 
+/**
+ * amdgpu_debugfs_gpu_reset - manually trigger a gpu reset
+ *
+ * Manually trigger a gpu reset at the next fence wait.
+ */
+static int amdgpu_debugfs_gpu_reset(struct seq_file *m, void *data)
+{
+       struct drm_info_node *node = (struct drm_info_node *) m->private;
+       struct drm_device *dev = node->minor->dev;
+       struct amdgpu_device *adev = dev->dev_private;
+
+       seq_printf(m, "gpu reset\n");
+       amdgpu_gpu_reset(adev);
+
+       return 0;
+}
+
 static struct drm_info_list amdgpu_debugfs_fence_list[] = {
        {"amdgpu_fence_info", &amdgpu_debugfs_fence_info, 0, NULL},
+       {"amdgpu_gpu_reset", &amdgpu_debugfs_gpu_reset, 0, NULL}
 };
 #endif
 
 int amdgpu_debugfs_fence_init(struct amdgpu_device *adev)
 {
 #if defined(CONFIG_DEBUG_FS)
-       return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_fence_list, 1);
+       return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_fence_list, 2);
 #else
        return 0;
 #endif