drm/amdgpu: sync to buffer moves before VM updates

Otherwise we could update the VM page tables while the move is only scheduled.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-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_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 2c22ec0..18daa2d 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -830,6 +830,7 @@ static void amdgpu_vm_update_ptes(struct amdgpu_device *adev,
  * amdgpu_vm_bo_update_mapping - update a mapping in the vm page table
  *
  * @adev: amdgpu_device pointer
+ * @exclusive: fence we need to sync to
  * @src: address where to copy page table entries from
  * @pages_addr: DMA addresses to use for mapping
  * @vm: requested vm
@@ -843,6 +844,7 @@ static void amdgpu_vm_update_ptes(struct amdgpu_device *adev,
  * Returns 0 for success, -EINVAL for failure.
  */
 static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
+                                      struct fence *exclusive,
                                       uint64_t src,
                                       dma_addr_t *pages_addr,
                                       struct amdgpu_vm *vm,
@@ -903,6 +905,10 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 
        vm_update_params.ib = &job->ibs[0];
 
+       r = amdgpu_sync_fence(adev, &job->sync, exclusive);
+       if (r)
+               goto error_free;
+
        r = amdgpu_sync_resv(adev, &job->sync, vm->page_directory->tbo.resv,
                             owner);
        if (r)
@@ -939,6 +945,7 @@ error_free:
  * amdgpu_vm_bo_split_mapping - split a mapping into smaller chunks
  *
  * @adev: amdgpu_device pointer
+ * @exclusive: fence we need to sync to
  * @gtt_flags: flags as they are used for GTT
  * @pages_addr: DMA addresses to use for mapping
  * @vm: requested vm
@@ -952,6 +959,7 @@ error_free:
  * Returns 0 for success, -EINVAL for failure.
  */
 static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
+                                     struct fence *exclusive,
                                      uint32_t gtt_flags,
                                      dma_addr_t *pages_addr,
                                      struct amdgpu_vm *vm,
@@ -982,7 +990,8 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
        addr += mapping->offset;
 
        if (!pages_addr || src)
-               return amdgpu_vm_bo_update_mapping(adev, src, pages_addr, vm,
+               return amdgpu_vm_bo_update_mapping(adev, exclusive,
+                                                  src, pages_addr, vm,
                                                   start, mapping->it.last,
                                                   flags, addr, fence);
 
@@ -990,7 +999,8 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
                uint64_t last;
 
                last = min((uint64_t)mapping->it.last, start + max_size - 1);
-               r = amdgpu_vm_bo_update_mapping(adev, src, pages_addr, vm,
+               r = amdgpu_vm_bo_update_mapping(adev, exclusive,
+                                               src, pages_addr, vm,
                                                start, last, flags, addr,
                                                fence);
                if (r)
@@ -1023,6 +1033,7 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
        struct amdgpu_bo_va_mapping *mapping;
        dma_addr_t *pages_addr = NULL;
        uint32_t gtt_flags, flags;
+       struct fence *exclusive;
        uint64_t addr;
        int r;
 
@@ -1044,8 +1055,11 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
                default:
                        break;
                }
+
+               exclusive = reservation_object_get_excl(bo_va->bo->tbo.resv);
        } else {
                addr = 0;
+               exclusive = NULL;
        }
 
        flags = amdgpu_ttm_tt_pte_flags(adev, bo_va->bo->tbo.ttm, mem);
@@ -1057,7 +1071,8 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
        spin_unlock(&vm->status_lock);
 
        list_for_each_entry(mapping, &bo_va->invalids, list) {
-               r = amdgpu_vm_bo_split_mapping(adev, gtt_flags, pages_addr, vm,
+               r = amdgpu_vm_bo_split_mapping(adev, exclusive,
+                                              gtt_flags, pages_addr, vm,
                                               mapping, flags, addr,
                                               &bo_va->last_pt_update);
                if (r)
@@ -1104,7 +1119,7 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
                        struct amdgpu_bo_va_mapping, list);
                list_del(&mapping->list);
 
-               r = amdgpu_vm_bo_split_mapping(adev, 0, NULL, vm, mapping,
+               r = amdgpu_vm_bo_split_mapping(adev, NULL, 0, NULL, vm, mapping,
                                               0, 0, NULL);
                kfree(mapping);
                if (r)