drm/amdgpu: export test ib debugfs interface

As Christian and David's suggestion, submit the test ib ring debug interfaces.
It's useful for debugging with the command submission without VM case.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 5d6175e..f5c4e2e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -61,6 +61,7 @@ MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");
 
 static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev);
 static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev);
+static int amdgpu_debugfs_test_ib_ring_init(struct amdgpu_device *adev);
 
 static const char *amdgpu_asic_name[] = {
        "TAHITI",
@@ -2227,6 +2228,10 @@ int amdgpu_device_init(struct amdgpu_device *adev,
        if (r)
                DRM_ERROR("registering register debugfs failed (%d).\n", r);
 
+       r = amdgpu_debugfs_test_ib_ring_init(adev);
+       if (r)
+               DRM_ERROR("registering register test ib ring debugfs failed (%d).\n", r);
+
        r = amdgpu_debugfs_firmware_init(adev);
        if (r)
                DRM_ERROR("registering firmware debugfs failed (%d).\n", r);
@@ -3743,11 +3748,60 @@ static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev)
        }
 }
 
+static int amdgpu_debugfs_test_ib(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;
+       int r = 0, i;
+
+       /* hold on the scheduler */
+       for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
+               struct amdgpu_ring *ring = adev->rings[i];
+
+               if (!ring || !ring->sched.thread)
+                       continue;
+               kthread_park(ring->sched.thread);
+       }
+
+       seq_printf(m, "run ib test:\n");
+       r = amdgpu_ib_ring_tests(adev);
+       if (r)
+               seq_printf(m, "ib ring tests failed (%d).\n", r);
+       else
+               seq_printf(m, "ib ring tests passed.\n");
+
+       /* go on the scheduler */
+       for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
+               struct amdgpu_ring *ring = adev->rings[i];
+
+               if (!ring || !ring->sched.thread)
+                       continue;
+               kthread_unpark(ring->sched.thread);
+       }
+
+       return 0;
+}
+
+static const struct drm_info_list amdgpu_debugfs_test_ib_ring_list[] = {
+       {"amdgpu_test_ib", &amdgpu_debugfs_test_ib}
+};
+
+static int amdgpu_debugfs_test_ib_ring_init(struct amdgpu_device *adev)
+{
+       return amdgpu_debugfs_add_files(adev,
+                                       amdgpu_debugfs_test_ib_ring_list, 1);
+}
+
 int amdgpu_debugfs_init(struct drm_minor *minor)
 {
        return 0;
 }
 #else
+static int amdgpu_debugfs_test_ib_init(struct amdgpu_device *adev)
+{
+       return 0;
+}
 static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev)
 {
        return 0;