drm/amdgpu: Revert "add lock for interval tree in vm"

Not needed any more because we need to protect the elements on the list anyway.

This reverts commit fe237ed7efec8ac147a4572fdf81173a7f8ddda7.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index e32ab13..28b4088 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -888,7 +888,6 @@ struct amdgpu_vm_id {
 
 struct amdgpu_vm {
        /* tree of virtual addresses mapped */
-       spinlock_t              it_lock;
        struct rb_root          va;
 
        /* protecting invalidated */

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 7e73e54..0e6d0d1 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1107,9 +1107,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
        saddr /= AMDGPU_GPU_PAGE_SIZE;
        eaddr /= AMDGPU_GPU_PAGE_SIZE;
 
-       spin_lock(&vm->it_lock);
        it = interval_tree_iter_first(&vm->va, saddr, eaddr);
-       spin_unlock(&vm->it_lock);
        if (it) {
                struct amdgpu_bo_va_mapping *tmp;
                tmp = container_of(it, struct amdgpu_bo_va_mapping, it);
@@ -1136,10 +1134,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
        mutex_lock(&bo_va->mutex);
        list_add(&mapping->list, &bo_va->invalids);
        mutex_unlock(&bo_va->mutex);
-       spin_lock(&vm->it_lock);
        interval_tree_insert(&mapping->it, &vm->va);
-       spin_unlock(&vm->it_lock);
-       trace_amdgpu_vm_bo_map(bo_va, mapping);
 
        /* Make sure the page tables are allocated */
        saddr >>= amdgpu_vm_block_size;
@@ -1191,9 +1186,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
 
 error_free:
        list_del(&mapping->list);
-       spin_lock(&vm->it_lock);
        interval_tree_remove(&mapping->it, &vm->va);
-       spin_unlock(&vm->it_lock);
        trace_amdgpu_vm_bo_unmap(bo_va, mapping);
        kfree(mapping);
 
@@ -1243,9 +1236,7 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
        }
        mutex_unlock(&bo_va->mutex);
        list_del(&mapping->list);
-       spin_lock(&vm->it_lock);
        interval_tree_remove(&mapping->it, &vm->va);
-       spin_unlock(&vm->it_lock);
        trace_amdgpu_vm_bo_unmap(bo_va, mapping);
 
        if (valid)
@@ -1280,17 +1271,13 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
 
        list_for_each_entry_safe(mapping, next, &bo_va->valids, list) {
                list_del(&mapping->list);
-               spin_lock(&vm->it_lock);
                interval_tree_remove(&mapping->it, &vm->va);
-               spin_unlock(&vm->it_lock);
                trace_amdgpu_vm_bo_unmap(bo_va, mapping);
                list_add(&mapping->list, &vm->freed);
        }
        list_for_each_entry_safe(mapping, next, &bo_va->invalids, list) {
                list_del(&mapping->list);
-               spin_lock(&vm->it_lock);
                interval_tree_remove(&mapping->it, &vm->va);
-               spin_unlock(&vm->it_lock);
                kfree(mapping);
        }
        fence_put(bo_va->last_pt_update);
@@ -1347,7 +1334,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
        INIT_LIST_HEAD(&vm->invalidated);
        INIT_LIST_HEAD(&vm->cleared);
        INIT_LIST_HEAD(&vm->freed);
-       spin_lock_init(&vm->it_lock);
+
        pd_size = amdgpu_vm_directory_size(adev);
        pd_entries = amdgpu_vm_num_pdes(adev);
 
@@ -1434,6 +1421,7 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
 
        amdgpu_bo_unref(&vm->page_directory);
        fence_put(vm->page_directory_fence);
+
        for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
                struct amdgpu_vm_id *id = &vm->ids[i];