[PATCH 7/7] Revert "drm/amdgpu/gmc11: avoid cpu accessing registers to flush VM"

[Jack Xiao]

This reverts commit 5af39cf2fbadbaac1a04c94a604b298a9a325670
since drv enabled mes to access registers.

Signed-off-by: Jack Xiao <jack.x...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c | 51 +-------------------------
 1 file changed, 1 insertion(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c 
b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
index 2be785cfc6dc..cd6b97d7184f 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
@@ -261,12 +261,6 @@ static void gmc_v11_0_flush_vm_hub(struct amdgpu_device 
*adev, uint32_t vmid,
 static void gmc_v11_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
                                        uint32_t vmhub, uint32_t flush_type)
 {
-       struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
-       struct dma_fence *fence;
-       struct amdgpu_job *job;
-
-       int r;
-
        if ((vmhub == AMDGPU_GFXHUB_0) && !adev->gfx.is_poweron)
                return;
 
@@ -290,51 +284,8 @@ static void gmc_v11_0_flush_gpu_tlb(struct amdgpu_device 
*adev, uint32_t vmid,
        }
 
        mutex_lock(&adev->mman.gtt_window_lock);
-
-       if (vmhub == AMDGPU_MMHUB_0) {
-               gmc_v11_0_flush_vm_hub(adev, vmid, AMDGPU_MMHUB_0, 0);
-               mutex_unlock(&adev->mman.gtt_window_lock);
-               return;
-       }
-
-       BUG_ON(vmhub != AMDGPU_GFXHUB_0);
-
-       if (!adev->mman.buffer_funcs_enabled ||
-           !adev->ib_pool_ready ||
-           amdgpu_in_reset(adev) ||
-           ring->sched.ready == false) {
-               gmc_v11_0_flush_vm_hub(adev, vmid, AMDGPU_GFXHUB_0, 0);
-               mutex_unlock(&adev->mman.gtt_window_lock);
-               return;
-       }
-
-       r = amdgpu_job_alloc_with_ib(adev, 16 * 4, AMDGPU_IB_POOL_IMMEDIATE,
-                                    &job);
-       if (r)
-               goto error_alloc;
-
-       job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gart.bo);
-       job->vm_needs_flush = true;
-       job->ibs->ptr[job->ibs->length_dw++] = ring->funcs->nop;
-       amdgpu_ring_pad_ib(ring, &job->ibs[0]);
-       r = amdgpu_job_submit(job, &adev->mman.entity,
-                             AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
-       if (r)
-               goto error_submit;
-
-       mutex_unlock(&adev->mman.gtt_window_lock);
-
-       dma_fence_wait(fence, false);
-       dma_fence_put(fence);
-
-       return;
-
-error_submit:
-       amdgpu_job_free(job);
-
-error_alloc:
+       gmc_v11_0_flush_vm_hub(adev, vmid, vmhub, 0);
        mutex_unlock(&adev->mman.gtt_window_lock);
-       DRM_ERROR("Error flushing GPU TLB using the SDMA (%d)!\n", r);
        return;
 }
 
-- 
2.35.1