/* * Call bo->mutex locked. */ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) { struct ttm_bo_device *bdev = bo->bdev; struct ttm_bo_global *glob = bo->glob; int ret = 0; uint32_t page_flags = 0; TTM_ASSERT_LOCKED(&bo->mutex); bo->ttm = NULL; if (bdev->need_dma32) page_flags |= TTM_PAGE_FLAG_DMA32; switch (bo->type) { case ttm_bo_type_device: if (zero_alloc) page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; case ttm_bo_type_kernel: bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, page_flags, glob->dummy_read_page); if (unlikely(bo->ttm == NULL)) ret = -ENOMEM; break; default: pr_err("Illegal buffer object type\n"); ret = -EINVAL; break; } return ret; }
/* * Call bo->mutex locked. */ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc) { struct ttm_bo_device *bdev = bo->bdev; struct ttm_bo_global *glob = bo->glob; int ret = 0; uint32_t page_flags = 0; TTM_ASSERT_LOCKED(&bo->mutex); bo->ttm = NULL; if (bdev->need_dma32) page_flags |= TTM_PAGE_FLAG_DMA32; switch (bo->type) { case ttm_bo_type_device: if (zero_alloc) page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC; case ttm_bo_type_kernel: bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, page_flags, glob->dummy_read_page); if (unlikely(bo->ttm == NULL)) ret = -ENOMEM; break; case ttm_bo_type_user: bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, page_flags | TTM_PAGE_FLAG_USER, glob->dummy_read_page); if (unlikely(bo->ttm == NULL)) { ret = -ENOMEM; break; } ret = ttm_tt_set_user(bo->ttm, current, bo->buffer_start, bo->num_pages); if (unlikely(ret != 0)) { ttm_tt_destroy(bo->ttm); bo->ttm = NULL; } break; default: printk(KERN_ERR TTM_PFX "Illegal buffer object type\n"); ret = -EINVAL; break; } return ret; }