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>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 5d6175ede20b..f5c4e2e5c4ad 100644
--- 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;