drm/ttm: revert "implement LRU add callbacks v2"

The additional housekeeping had too much CPU overhead,
let's use the BO priorities instead.

agd: also revert hibmc changes

Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-and-Tested-by: Roger.He <Hongbo.He@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -1086,8 +1086,6 @@ static struct ttm_bo_driver amdgpu_bo_driver = {
 	.fault_reserve_notify = &amdgpu_bo_fault_reserve_notify,
 	.io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
 	.io_mem_free = &amdgpu_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int amdgpu_ttm_init(struct amdgpu_device *adev)

drivers/gpu/drm/ast/ast_ttm.c

@@ -236,8 +236,6 @@ struct ttm_bo_driver ast_bo_driver = {
 	.verify_access = ast_bo_verify_access,
 	.io_mem_reserve = &ast_ttm_io_mem_reserve,
 	.io_mem_free = &ast_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int ast_mm_init(struct ast_private *ast)

drivers/gpu/drm/bochs/bochs_mm.c

@@ -205,8 +205,6 @@ struct ttm_bo_driver bochs_bo_driver = {
 	.verify_access = bochs_bo_verify_access,
 	.io_mem_reserve = &bochs_ttm_io_mem_reserve,
 	.io_mem_free = &bochs_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int bochs_mm_init(struct bochs_device *bochs)

drivers/gpu/drm/cirrus/cirrus_ttm.c

@@ -236,8 +236,6 @@ struct ttm_bo_driver cirrus_bo_driver = {
 	.verify_access = cirrus_bo_verify_access,
 	.io_mem_reserve = &cirrus_ttm_io_mem_reserve,
 	.io_mem_free = &cirrus_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int cirrus_mm_init(struct cirrus_device *cirrus)

drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c

@@ -243,8 +243,6 @@ struct ttm_bo_driver hibmc_bo_driver = {
 	.verify_access		= hibmc_bo_verify_access,
 	.io_mem_reserve		= &hibmc_ttm_io_mem_reserve,
 	.io_mem_free		= NULL,
-	.lru_tail		= &ttm_bo_default_lru_tail,
-	.swap_lru_tail		= &ttm_bo_default_swap_lru_tail,
 };
 
 int hibmc_mm_init(struct hibmc_drm_private *hibmc)

drivers/gpu/drm/mgag200/mgag200_ttm.c

@@ -236,8 +236,6 @@ struct ttm_bo_driver mgag200_bo_driver = {
 	.verify_access = mgag200_bo_verify_access,
 	.io_mem_reserve = &mgag200_ttm_io_mem_reserve,
 	.io_mem_free = &mgag200_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int mgag200_mm_init(struct mga_device *mdev)

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -1571,8 +1571,6 @@ struct ttm_bo_driver nouveau_bo_driver = {
 	.fault_reserve_notify = &nouveau_ttm_fault_reserve_notify,
 	.io_mem_reserve = &nouveau_ttm_io_mem_reserve,
 	.io_mem_free = &nouveau_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 struct nvkm_vma *

drivers/gpu/drm/qxl/qxl_ttm.c

@@ -394,8 +394,6 @@ static struct ttm_bo_driver qxl_bo_driver = {
 	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
 	.io_mem_free = &qxl_ttm_io_mem_free,
 	.move_notify = &qxl_bo_move_notify,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int qxl_ttm_init(struct qxl_device *qdev)

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -871,8 +871,6 @@ static struct ttm_bo_driver radeon_bo_driver = {
 	.fault_reserve_notify = &radeon_bo_fault_reserve_notify,
 	.io_mem_reserve = &radeon_ttm_io_mem_reserve,
 	.io_mem_free = &radeon_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int radeon_ttm_init(struct radeon_device *rdev)

drivers/gpu/drm/ttm/ttm_bo.c

@@ -163,6 +163,7 @@ static void ttm_bo_release_list(struct kref *list_kref)
 void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
 {
 	struct ttm_bo_device *bdev = bo->bdev;
+	struct ttm_mem_type_manager *man;
 
 	lockdep_assert_held(&bo->resv->lock.base);
 
@@ -170,11 +171,13 @@ void ttm_bo_add_to_lru(struct ttm_buffer_object *bo)
 
 		BUG_ON(!list_empty(&bo->lru));
 
-		list_add(&bo->lru, bdev->driver->lru_tail(bo));
+		man = &bdev->man[bo->mem.mem_type];
+		list_add_tail(&bo->lru, &man->lru[bo->priority]);
 		kref_get(&bo->list_kref);
 
 		if (bo->ttm && !(bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
-			list_add(&bo->swap, bdev->driver->swap_lru_tail(bo));
+			list_add_tail(&bo->swap,
+				      &bo->glob->swap_lru[bo->priority]);
 			kref_get(&bo->list_kref);
 		}
 	}
@@ -240,18 +243,6 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
 }
 EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
 
-struct list_head *ttm_bo_default_lru_tail(struct ttm_buffer_object *bo)
-{
-	return bo->bdev->man[bo->mem.mem_type].lru[bo->priority].prev;
-}
-EXPORT_SYMBOL(ttm_bo_default_lru_tail);
-
-struct list_head *ttm_bo_default_swap_lru_tail(struct ttm_buffer_object *bo)
-{
-	return bo->glob->swap_lru[bo->priority].prev;
-}
-EXPORT_SYMBOL(ttm_bo_default_swap_lru_tail);
-
 /*
  * Call bo->mutex locked.
  */

drivers/gpu/drm/virtio/virtgpu_ttm.c

@@ -434,8 +434,6 @@ static struct ttm_bo_driver virtio_gpu_bo_driver = {
 	.io_mem_free = &virtio_gpu_ttm_io_mem_free,
 	.move_notify = &virtio_gpu_bo_move_notify,
 	.swap_notify = &virtio_gpu_bo_swap_notify,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };
 
 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev)

drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c

@@ -859,6 +859,4 @@ struct ttm_bo_driver vmw_bo_driver = {
 	.fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
 	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
 	.io_mem_free = &vmw_ttm_io_mem_free,
-	.lru_tail = &ttm_bo_default_lru_tail,
-	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 };

include/drm/ttm/ttm_bo_driver.h

@@ -468,12 +468,6 @@ struct ttm_bo_driver {
 	 * Called with LRU lock held immediately before the removal.
 	 */
 	void (*lru_removal)(struct ttm_buffer_object *bo);
-
-	/**
-	 * Return the list_head after which a BO should be inserted in the LRU.
-	 */
-	struct list_head *(*lru_tail)(struct ttm_buffer_object *bo);
-	struct list_head *(*swap_lru_tail)(struct ttm_buffer_object *bo);
 };
 
 /**
@@ -788,9 +782,6 @@ extern void ttm_mem_io_unlock(struct ttm_mem_type_manager *man);
 extern void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo);
 extern void ttm_bo_add_to_lru(struct ttm_buffer_object *bo);
 
-struct list_head *ttm_bo_default_lru_tail(struct ttm_buffer_object *bo);
-struct list_head *ttm_bo_default_swap_lru_tail(struct ttm_buffer_object *bo);
-
 /**
  * __ttm_bo_reserve:
  *