drm/radeon: add debugfs file to trigger GPU reset

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index a77b1c1..9137870 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -819,15 +819,35 @@ static int radeon_debugfs_fence_info(struct seq_file *m, void *data)
        return 0;
 }
 
+/**
+ * radeon_debugfs_gpu_reset - manually trigger a gpu reset
+ *
+ * Manually trigger a gpu reset at the next fence wait.
+ */
+static int radeon_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 radeon_device *rdev = dev->dev_private;
+
+       down_read(&rdev->exclusive_lock);
+       seq_printf(m, "%d\n", rdev->needs_reset);
+       rdev->needs_reset = true;
+       up_read(&rdev->exclusive_lock);
+
+       return 0;
+}
+
 static struct drm_info_list radeon_debugfs_fence_list[] = {
        {"radeon_fence_info", &radeon_debugfs_fence_info, 0, NULL},
+       {"radeon_gpu_reset", &radeon_debugfs_gpu_reset, 0, NULL}
 };
 #endif
 
 int radeon_debugfs_fence_init(struct radeon_device *rdev)
 {
 #if defined(CONFIG_DEBUG_FS)
-       return radeon_debugfs_add_files(rdev, radeon_debugfs_fence_list, 1);
+       return radeon_debugfs_add_files(rdev, radeon_debugfs_fence_list, 2);
 #else
        return 0;
 #endif