drm/amdgpu: cleanup amdgpu_sync_rings V2

No longer needed now that semaphores are gone.

V2: remove the first amdgpu_sync_wait in amdgpu_ib_schedule

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Ken Wang  <Qingqing.Wang@amd.com> (V1)
Reviewed-by: Monk Liu <monk.liu@amd.com> (V2)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 3 insertions, 51 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 745a9a1ae54b..8c55c1d78ffe 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -654,8 +654,6 @@ int amdgpu_sync_resv(struct amdgpu_device *adev,
                      struct amdgpu_sync *sync,
                      struct reservation_object *resv,
                      void *owner);
-int amdgpu_sync_rings(struct amdgpu_sync *sync,
-                      struct amdgpu_ring *ring);
 struct fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync);
 int amdgpu_sync_wait(struct amdgpu_sync *sync);
 void amdgpu_sync_free(struct amdgpu_device *adev, struct amdgpu_sync *sync,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 9e25edafa721..3b58d70b73cd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -141,11 +141,7 @@ int amdgpu_ib_schedule(struct amdgpu_device *adev, unsigned num_ibs,
                 dev_err(adev->dev, "couldn't schedule ib\n");
                 return -EINVAL;
         }
-        r = amdgpu_sync_wait(&ibs->sync);
-        if (r) {
-                dev_err(adev->dev, "IB sync failed (%d).\n", r);
-                return r;
-        }
+
         r = amdgpu_ring_lock(ring, (256 + AMDGPU_NUM_SYNCS * 8) * num_ibs);
         if (r) {
                 dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
@@ -161,10 +157,10 @@ int amdgpu_ib_schedule(struct amdgpu_device *adev, unsigned num_ibs,
                 }
         }
 
-        r = amdgpu_sync_rings(&ibs->sync, ring);
+        r = amdgpu_sync_wait(&ibs->sync);
         if (r) {
                 amdgpu_ring_unlock_undo(ring);
-                dev_err(adev->dev, "failed to sync rings (%d)\n", r);
+                dev_err(adev->dev, "failed to sync wait (%d)\n", r);
                 return r;
         }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index a6fee511aab5..7f12a4d55c52 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -261,48 +261,6 @@ int amdgpu_sync_wait(struct amdgpu_sync *sync)
 }
 
 /**
- * amdgpu_sync_rings - sync ring to all registered fences
- *
- * @sync: sync object to use
- * @ring: ring that needs sync
- *
- * Ensure that all registered fences are signaled before letting
- * the ring continue. The caller must hold the ring lock.
- */
-int amdgpu_sync_rings(struct amdgpu_sync *sync,
-                      struct amdgpu_ring *ring)
-{
-        struct amdgpu_device *adev = ring->adev;
-        int i, r;
-
-        for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
-                struct amdgpu_ring *other = adev->rings[i];
-                struct amdgpu_fence *fence;
-
-                if (!sync->sync_to[i])
-                        continue;
-
-                fence = to_amdgpu_fence(sync->sync_to[i]);
-
-                /* prevent GPU deadlocks */
-                if (!other->ready) {
-                        dev_err(adev->dev, "Syncing to a disabled ring!");
-                        return -EINVAL;
-                }
-
-                if (amdgpu_enable_scheduler) {
-                        r = fence_wait(sync->sync_to[i], true);
-                        if (r)
-                                return r;
-                        continue;
-                }
-
-        }
-
-        return 0;
-}
-
-/**
  * amdgpu_sync_free - free the sync object
  *
  * @adev: amdgpu_device pointer