drm/amdgpu: use kernel fence for last_pt_update
[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_vm.c
index 1e895b979ec68033cde720236b0aa150cebbab9e..d90254f5ca6a0dff79e016c661eb45cf63fd396a 100644 (file)
@@ -127,16 +127,16 @@ struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
 /**
  * amdgpu_vm_grab_id - allocate the next free VMID
  *
- * @ring: ring we want to submit job to
  * @vm: vm to allocate id for
+ * @ring: ring we want to submit job to
+ * @sync: sync object where we add dependencies
  *
- * Allocate an id for the vm (cayman+).
- * Returns the fence we need to sync to (if any).
+ * Allocate an id for the vm, adding fences to the sync obj as necessary.
  *
- * Global and local mutex must be locked!
+ * Global mutex must be locked!
  */
-struct amdgpu_fence *amdgpu_vm_grab_id(struct amdgpu_ring *ring,
-                                      struct amdgpu_vm *vm)
+int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
+                     struct amdgpu_sync *sync)
 {
        struct amdgpu_fence *best[AMDGPU_MAX_RINGS] = {};
        struct amdgpu_vm_id *vm_id = &vm->ids[ring->idx];
@@ -148,7 +148,7 @@ struct amdgpu_fence *amdgpu_vm_grab_id(struct amdgpu_ring *ring,
        /* check if the id is still valid */
        if (vm_id->id && vm_id->last_id_use &&
            vm_id->last_id_use == adev->vm_manager.active[vm_id->id])
-               return NULL;
+               return 0;
 
        /* we definately need to flush */
        vm_id->pd_gpu_addr = ~0ll;
@@ -161,7 +161,7 @@ struct amdgpu_fence *amdgpu_vm_grab_id(struct amdgpu_ring *ring,
                        /* found a free one */
                        vm_id->id = i;
                        trace_amdgpu_vm_grab_id(i, ring->idx);
-                       return NULL;
+                       return 0;
                }
 
                if (amdgpu_fence_is_earlier(fence, best[fence->ring->idx])) {
@@ -172,15 +172,19 @@ struct amdgpu_fence *amdgpu_vm_grab_id(struct amdgpu_ring *ring,
 
        for (i = 0; i < 2; ++i) {
                if (choices[i]) {
+                       struct amdgpu_fence *fence;
+
+                       fence  = adev->vm_manager.active[choices[i]];
                        vm_id->id = choices[i];
+
                        trace_amdgpu_vm_grab_id(choices[i], ring->idx);
-                       return adev->vm_manager.active[choices[i]];
+                       return amdgpu_sync_fence(ring->adev, sync, &fence->base);
                }
        }
 
        /* should never happen */
        BUG();
-       return NULL;
+       return -EINVAL;
 }
 
 /**
@@ -302,6 +306,24 @@ static void amdgpu_vm_update_pages(struct amdgpu_device *adev,
        }
 }
 
+static int amdgpu_vm_free_job(
+       struct amdgpu_cs_parser *sched_job)
+{
+       int i;
+       for (i = 0; i < sched_job->num_ibs; i++)
+               amdgpu_ib_free(sched_job->adev, &sched_job->ibs[i]);
+       kfree(sched_job->ibs);
+       return 0;
+}
+
+static int amdgpu_vm_run_job(
+       struct amdgpu_cs_parser *sched_job)
+{
+       amdgpu_bo_fence(sched_job->job_param.vm.bo,
+                       &sched_job->ibs[sched_job->num_ibs -1].fence->base, true);
+       return 0;
+}
+
 /**
  * amdgpu_vm_clear_bo - initially clear the page dir/table
  *
@@ -312,7 +334,8 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
                              struct amdgpu_bo *bo)
 {
        struct amdgpu_ring *ring = adev->vm_manager.vm_pte_funcs_ring;
-       struct amdgpu_ib ib;
+       struct amdgpu_cs_parser *sched_job = NULL;
+       struct amdgpu_ib *ib;
        unsigned entries;
        uint64_t addr;
        int r;
@@ -332,24 +355,54 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
        addr = amdgpu_bo_gpu_offset(bo);
        entries = amdgpu_bo_size(bo) / 8;
 
-       r = amdgpu_ib_get(ring, NULL, entries * 2 + 64, &ib);
-       if (r)
+       ib = kzalloc(sizeof(struct amdgpu_ib), GFP_KERNEL);
+       if (!ib)
                goto error_unreserve;
 
-       ib.length_dw = 0;
-
-       amdgpu_vm_update_pages(adev, &ib, addr, 0, entries, 0, 0, 0);
-       amdgpu_vm_pad_ib(adev, &ib);
-       WARN_ON(ib.length_dw > 64);
-
-       r = amdgpu_ib_schedule(adev, 1, &ib, AMDGPU_FENCE_OWNER_VM);
+       r = amdgpu_ib_get(ring, NULL, entries * 2 + 64, ib);
        if (r)
                goto error_free;
 
-       amdgpu_bo_fence(bo, ib.fence, true);
+       ib->length_dw = 0;
+
+       amdgpu_vm_update_pages(adev, ib, addr, 0, entries, 0, 0, 0);
+       amdgpu_vm_pad_ib(adev, ib);
+       WARN_ON(ib->length_dw > 64);
+
+       if (amdgpu_enable_scheduler) {
+               int r;
+               uint64_t v_seq;
+               sched_job = amdgpu_cs_parser_create(adev, AMDGPU_FENCE_OWNER_VM,
+                                                   adev->kernel_ctx, ib, 1);
+               if(!sched_job)
+                       goto error_free;
+               sched_job->job_param.vm.bo = bo;
+               sched_job->run_job = amdgpu_vm_run_job;
+               sched_job->free_job = amdgpu_vm_free_job;
+               v_seq = atomic64_inc_return(&adev->kernel_ctx->rings[ring->idx].c_entity.last_queued_v_seq);
+               ib->sequence = v_seq;
+               amd_sched_push_job(ring->scheduler,
+                                  &adev->kernel_ctx->rings[ring->idx].c_entity,
+                                  sched_job);
+               r = amd_sched_wait_emit(&adev->kernel_ctx->rings[ring->idx].c_entity,
+                                       v_seq,
+                                       false,
+                                       -1);
+               if (r)
+                       DRM_ERROR("emit timeout\n");
+
+               amdgpu_bo_unreserve(bo);
+               return 0;
+       } else {
+               r = amdgpu_ib_schedule(adev, 1, ib, AMDGPU_FENCE_OWNER_VM);
+               if (r)
+                       goto error_free;
+               amdgpu_bo_fence(bo, &ib->fence->base, true);
+       }
 
 error_free:
-       amdgpu_ib_free(adev, &ib);
+       amdgpu_ib_free(adev, ib);
+       kfree(ib);
 
 error_unreserve:
        amdgpu_bo_unreserve(bo);
@@ -402,7 +455,9 @@ int amdgpu_vm_update_page_directory(struct amdgpu_device *adev,
        uint32_t incr = AMDGPU_VM_PTE_COUNT * 8;
        uint64_t last_pde = ~0, last_pt = ~0;
        unsigned count = 0, pt_idx, ndw;
-       struct amdgpu_ib ib;
+       struct amdgpu_ib *ib;
+       struct amdgpu_cs_parser *sched_job = NULL;
+
        int r;
 
        /* padding, etc. */
@@ -415,10 +470,14 @@ int amdgpu_vm_update_page_directory(struct amdgpu_device *adev,
        if (ndw > 0xfffff)
                return -ENOMEM;
 
-       r = amdgpu_ib_get(ring, NULL, ndw * 4, &ib);
+       ib = kzalloc(sizeof(struct amdgpu_ib), GFP_KERNEL);
+       if (!ib)
+               return -ENOMEM;
+
+       r = amdgpu_ib_get(ring, NULL, ndw * 4, ib);
        if (r)
                return r;
-       ib.length_dw = 0;
+       ib->length_dw = 0;
 
        /* walk over the address space and update the page directory */
        for (pt_idx = 0; pt_idx <= vm->max_pde_used; ++pt_idx) {
@@ -438,7 +497,7 @@ int amdgpu_vm_update_page_directory(struct amdgpu_device *adev,
                    ((last_pt + incr * count) != pt)) {
 
                        if (count) {
-                               amdgpu_vm_update_pages(adev, &ib, last_pde,
+                               amdgpu_vm_update_pages(adev, ib, last_pde,
                                                       last_pt, count, incr,
                                                       AMDGPU_PTE_VALID, 0);
                        }
@@ -452,23 +511,59 @@ int amdgpu_vm_update_page_directory(struct amdgpu_device *adev,
        }
 
        if (count)
-               amdgpu_vm_update_pages(adev, &ib, last_pde, last_pt, count,
+               amdgpu_vm_update_pages(adev, ib, last_pde, last_pt, count,
                                       incr, AMDGPU_PTE_VALID, 0);
 
-       if (ib.length_dw != 0) {
-               amdgpu_vm_pad_ib(adev, &ib);
-               amdgpu_sync_resv(adev, &ib.sync, pd->tbo.resv, AMDGPU_FENCE_OWNER_VM);
-               WARN_ON(ib.length_dw > ndw);
-               r = amdgpu_ib_schedule(adev, 1, &ib, AMDGPU_FENCE_OWNER_VM);
-               if (r) {
-                       amdgpu_ib_free(adev, &ib);
-                       return r;
+       if (ib->length_dw != 0) {
+               amdgpu_vm_pad_ib(adev, ib);
+               amdgpu_sync_resv(adev, &ib->sync, pd->tbo.resv, AMDGPU_FENCE_OWNER_VM);
+               WARN_ON(ib->length_dw > ndw);
+
+               if (amdgpu_enable_scheduler) {
+                       int r;
+                       uint64_t v_seq;
+                       sched_job = amdgpu_cs_parser_create(adev, AMDGPU_FENCE_OWNER_VM,
+                                                           adev->kernel_ctx,
+                                                           ib, 1);
+                       if(!sched_job)
+                               goto error_free;
+                       sched_job->job_param.vm.bo = pd;
+                       sched_job->run_job = amdgpu_vm_run_job;
+                       sched_job->free_job = amdgpu_vm_free_job;
+                       v_seq = atomic64_inc_return(&adev->kernel_ctx->rings[ring->idx].c_entity.last_queued_v_seq);
+                       ib->sequence = v_seq;
+                       amd_sched_push_job(ring->scheduler,
+                                          &adev->kernel_ctx->rings[ring->idx].c_entity,
+                                          sched_job);
+                       r = amd_sched_wait_emit(&adev->kernel_ctx->rings[ring->idx].c_entity,
+                                               v_seq,
+                                               false,
+                                               -1);
+                       if (r)
+                               DRM_ERROR("emit timeout\n");
+               } else {
+                       r = amdgpu_ib_schedule(adev, 1, ib, AMDGPU_FENCE_OWNER_VM);
+                       if (r) {
+                               amdgpu_ib_free(adev, ib);
+                               return r;
+                       }
+                       amdgpu_bo_fence(pd, &ib->fence->base, true);
                }
-               amdgpu_bo_fence(pd, ib.fence, true);
        }
-       amdgpu_ib_free(adev, &ib);
+
+       if (!amdgpu_enable_scheduler || ib->length_dw == 0) {
+               amdgpu_ib_free(adev, ib);
+               kfree(ib);
+       }
 
        return 0;
+
+error_free:
+       if (sched_job)
+               kfree(sched_job);
+       amdgpu_ib_free(adev, ib);
+       kfree(ib);
+       return -ENOMEM;
 }
 
 /**
@@ -642,7 +737,7 @@ static int amdgpu_vm_update_ptes(struct amdgpu_device *adev,
  */
 static void amdgpu_vm_fence_pts(struct amdgpu_vm *vm,
                                uint64_t start, uint64_t end,
-                               struct amdgpu_fence *fence)
+                               struct fence *fence)
 {
        unsigned i;
 
@@ -653,6 +748,20 @@ static void amdgpu_vm_fence_pts(struct amdgpu_vm *vm,
                amdgpu_bo_fence(vm->page_tables[i].bo, fence, true);
 }
 
+static int amdgpu_vm_bo_update_mapping_run_job(
+       struct amdgpu_cs_parser *sched_job)
+{
+       struct fence **fence = sched_job->job_param.vm_mapping.fence;
+       amdgpu_vm_fence_pts(sched_job->job_param.vm_mapping.vm,
+                           sched_job->job_param.vm_mapping.start,
+                           sched_job->job_param.vm_mapping.last + 1,
+                           &sched_job->ibs[sched_job->num_ibs -1].fence->base);
+       if (fence) {
+               fence_put(*fence);
+               *fence = fence_get(&sched_job->ibs[sched_job->num_ibs -1].fence->base);
+       }
+       return 0;
+}
 /**
  * amdgpu_vm_bo_update_mapping - update a mapping in the vm page table
  *
@@ -672,12 +781,13 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
                                       struct amdgpu_vm *vm,
                                       struct amdgpu_bo_va_mapping *mapping,
                                       uint64_t addr, uint32_t gtt_flags,
-                                      struct amdgpu_fence **fence)
+                                      struct fence **fence)
 {
        struct amdgpu_ring *ring = adev->vm_manager.vm_pte_funcs_ring;
        unsigned nptes, ncmds, ndw;
        uint32_t flags = gtt_flags;
-       struct amdgpu_ib ib;
+       struct amdgpu_ib *ib;
+       struct amdgpu_cs_parser *sched_job = NULL;
        int r;
 
        /* normally,bo_va->flags only contians READABLE and WIRTEABLE bit go here
@@ -724,48 +834,91 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
        if (ndw > 0xfffff)
                return -ENOMEM;
 
-       r = amdgpu_ib_get(ring, NULL, ndw * 4, &ib);
-       if (r)
+       ib = kzalloc(sizeof(struct amdgpu_ib), GFP_KERNEL);
+       if (!ib)
+               return -ENOMEM;
+
+       r = amdgpu_ib_get(ring, NULL, ndw * 4, ib);
+       if (r) {
+               kfree(ib);
                return r;
-       ib.length_dw = 0;
+       }
+
+       ib->length_dw = 0;
 
        if (!(flags & AMDGPU_PTE_VALID)) {
                unsigned i;
 
                for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                        struct amdgpu_fence *f = vm->ids[i].last_id_use;
-                       r = amdgpu_sync_fence(adev, &ib.sync, &f->base);
+                       r = amdgpu_sync_fence(adev, &ib->sync, &f->base);
                        if (r)
                                return r;
                }
        }
 
-       r = amdgpu_vm_update_ptes(adev, vm, &ib, mapping->it.start,
+       r = amdgpu_vm_update_ptes(adev, vm, ib, mapping->it.start,
                                  mapping->it.last + 1, addr + mapping->offset,
                                  flags, gtt_flags);
 
        if (r) {
-               amdgpu_ib_free(adev, &ib);
+               amdgpu_ib_free(adev, ib);
+               kfree(ib);
                return r;
        }
 
-       amdgpu_vm_pad_ib(adev, &ib);
-       WARN_ON(ib.length_dw > ndw);
+       amdgpu_vm_pad_ib(adev, ib);
+       WARN_ON(ib->length_dw > ndw);
 
-       r = amdgpu_ib_schedule(adev, 1, &ib, AMDGPU_FENCE_OWNER_VM);
-       if (r) {
-               amdgpu_ib_free(adev, &ib);
-               return r;
-       }
-       amdgpu_vm_fence_pts(vm, mapping->it.start,
-                           mapping->it.last + 1, ib.fence);
-       if (fence) {
-               amdgpu_fence_unref(fence);
-               *fence = amdgpu_fence_ref(ib.fence);
-       }
-       amdgpu_ib_free(adev, &ib);
+       if (amdgpu_enable_scheduler) {
+               int r;
+               uint64_t v_seq;
+               sched_job = amdgpu_cs_parser_create(adev, AMDGPU_FENCE_OWNER_VM,
+                                                   adev->kernel_ctx, ib, 1);
+               if(!sched_job)
+                       goto error_free;
+               sched_job->job_param.vm_mapping.vm = vm;
+               sched_job->job_param.vm_mapping.start = mapping->it.start;
+               sched_job->job_param.vm_mapping.last = mapping->it.last;
+               sched_job->job_param.vm_mapping.fence = fence;
+               sched_job->run_job = amdgpu_vm_bo_update_mapping_run_job;
+               sched_job->free_job = amdgpu_vm_free_job;
+               v_seq = atomic64_inc_return(&adev->kernel_ctx->rings[ring->idx].c_entity.last_queued_v_seq);
+               ib->sequence = v_seq;
+               amd_sched_push_job(ring->scheduler,
+                                  &adev->kernel_ctx->rings[ring->idx].c_entity,
+                                  sched_job);
+               r = amd_sched_wait_emit(&adev->kernel_ctx->rings[ring->idx].c_entity,
+                                       v_seq,
+                                       false,
+                                       -1);
+               if (r)
+                       DRM_ERROR("emit timeout\n");
+       } else {
+               r = amdgpu_ib_schedule(adev, 1, ib, AMDGPU_FENCE_OWNER_VM);
+               if (r) {
+                       amdgpu_ib_free(adev, ib);
+                       return r;
+               }
 
+               amdgpu_vm_fence_pts(vm, mapping->it.start,
+                                   mapping->it.last + 1, &ib->fence->base);
+               if (fence) {
+                       fence_put(*fence);
+                       *fence = fence_get(&ib->fence->base);
+               }
+
+               amdgpu_ib_free(adev, ib);
+               kfree(ib);
+       }
        return 0;
+
+error_free:
+       if (sched_job)
+               kfree(sched_job);
+       amdgpu_ib_free(adev, ib);
+       kfree(ib);
+       return -ENOMEM;
 }
 
 /**
@@ -798,21 +951,24 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
                addr = 0;
        }
 
-       if (addr == bo_va->addr)
-               return 0;
-
        flags = amdgpu_ttm_tt_pte_flags(adev, bo_va->bo->tbo.ttm, mem);
 
-       list_for_each_entry(mapping, &bo_va->mappings, list) {
+       spin_lock(&vm->status_lock);
+       if (!list_empty(&bo_va->vm_status))
+               list_splice_init(&bo_va->valids, &bo_va->invalids);
+       spin_unlock(&vm->status_lock);
+
+       list_for_each_entry(mapping, &bo_va->invalids, list) {
                r = amdgpu_vm_bo_update_mapping(adev, vm, mapping, addr,
                                                flags, &bo_va->last_pt_update);
                if (r)
                        return r;
        }
 
-       bo_va->addr = addr;
        spin_lock(&vm->status_lock);
        list_del_init(&bo_va->vm_status);
+       if (!mem)
+               list_add(&bo_va->vm_status, &vm->cleared);
        spin_unlock(&vm->status_lock);
 
        return 0;
@@ -882,7 +1038,7 @@ int amdgpu_vm_clear_invalids(struct amdgpu_device *adev,
        spin_unlock(&vm->status_lock);
 
        if (bo_va)
-               r = amdgpu_sync_fence(adev, sync, &bo_va->last_pt_update->base);
+               r = amdgpu_sync_fence(adev, sync, bo_va->last_pt_update);
 
        return r;
 }
@@ -912,10 +1068,10 @@ struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
        }
        bo_va->vm = vm;
        bo_va->bo = bo;
-       bo_va->addr = 0;
        bo_va->ref_count = 1;
        INIT_LIST_HEAD(&bo_va->bo_list);
-       INIT_LIST_HEAD(&bo_va->mappings);
+       INIT_LIST_HEAD(&bo_va->valids);
+       INIT_LIST_HEAD(&bo_va->invalids);
        INIT_LIST_HEAD(&bo_va->vm_status);
 
        mutex_lock(&vm->mutex);
@@ -1004,12 +1160,10 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
        mapping->offset = offset;
        mapping->flags = flags;
 
-       list_add(&mapping->list, &bo_va->mappings);
+       list_add(&mapping->list, &bo_va->invalids);
        interval_tree_insert(&mapping->it, &vm->va);
        trace_amdgpu_vm_bo_map(bo_va, mapping);
 
-       bo_va->addr = 0;
-
        /* Make sure the page tables are allocated */
        saddr >>= amdgpu_vm_block_size;
        eaddr >>= amdgpu_vm_block_size;
@@ -1090,17 +1244,27 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
 {
        struct amdgpu_bo_va_mapping *mapping;
        struct amdgpu_vm *vm = bo_va->vm;
+       bool valid = true;
 
        saddr /= AMDGPU_GPU_PAGE_SIZE;
 
-       list_for_each_entry(mapping, &bo_va->mappings, list) {
+       list_for_each_entry(mapping, &bo_va->valids, list) {
                if (mapping->it.start == saddr)
                        break;
        }
 
-       if (&mapping->list == &bo_va->mappings) {
-               amdgpu_bo_unreserve(bo_va->bo);
-               return -ENOENT;
+       if (&mapping->list == &bo_va->valids) {
+               valid = false;
+
+               list_for_each_entry(mapping, &bo_va->invalids, list) {
+                       if (mapping->it.start == saddr)
+                               break;
+               }
+
+               if (&mapping->list == &bo_va->invalids) {
+                       amdgpu_bo_unreserve(bo_va->bo);
+                       return -ENOENT;
+               }
        }
 
        mutex_lock(&vm->mutex);
@@ -1108,12 +1272,10 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
        interval_tree_remove(&mapping->it, &vm->va);
        trace_amdgpu_vm_bo_unmap(bo_va, mapping);
 
-       if (bo_va->addr) {
-               /* clear the old address */
+       if (valid)
                list_add(&mapping->list, &vm->freed);
-       } else {
+       else
                kfree(mapping);
-       }
        mutex_unlock(&vm->mutex);
        amdgpu_bo_unreserve(bo_va->bo);
 
@@ -1144,16 +1306,19 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
        list_del(&bo_va->vm_status);
        spin_unlock(&vm->status_lock);
 
-       list_for_each_entry_safe(mapping, next, &bo_va->mappings, list) {
+       list_for_each_entry_safe(mapping, next, &bo_va->valids, list) {
                list_del(&mapping->list);
                interval_tree_remove(&mapping->it, &vm->va);
                trace_amdgpu_vm_bo_unmap(bo_va, mapping);
-               if (bo_va->addr)
-                       list_add(&mapping->list, &vm->freed);
-               else
-                       kfree(mapping);
+               list_add(&mapping->list, &vm->freed);
        }
-       amdgpu_fence_unref(&bo_va->last_pt_update);
+       list_for_each_entry_safe(mapping, next, &bo_va->invalids, list) {
+               list_del(&mapping->list);
+               interval_tree_remove(&mapping->it, &vm->va);
+               kfree(mapping);
+       }
+
+       fence_put(bo_va->last_pt_update);
        kfree(bo_va);
 
        mutex_unlock(&vm->mutex);
@@ -1174,12 +1339,10 @@ void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
        struct amdgpu_bo_va *bo_va;
 
        list_for_each_entry(bo_va, &bo->va, bo_list) {
-               if (bo_va->addr) {
-                       spin_lock(&bo_va->vm->status_lock);
-                       list_del(&bo_va->vm_status);
+               spin_lock(&bo_va->vm->status_lock);
+               if (list_empty(&bo_va->vm_status))
                        list_add(&bo_va->vm_status, &bo_va->vm->invalidated);
-                       spin_unlock(&bo_va->vm->status_lock);
-               }
+               spin_unlock(&bo_va->vm->status_lock);
        }
 }
 
@@ -1207,6 +1370,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
        vm->va = RB_ROOT;
        spin_lock_init(&vm->status_lock);
        INIT_LIST_HEAD(&vm->invalidated);
+       INIT_LIST_HEAD(&vm->cleared);
        INIT_LIST_HEAD(&vm->freed);
 
        pd_size = amdgpu_vm_directory_size(adev);