/* SPDX-License-Identifier: GPL-2.0 OR MIT */ /* * Copyright 2020 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Christian König */ #ifndef _TTM_PAGE_POOL_H_ #define _TTM_PAGE_POOL_H_ #include <linux/mmzone.h> #include <linux/llist.h> #include <linux/spinlock.h> #include <drm/ttm/ttm_caching.h> struct device; struct ttm_tt; struct ttm_pool; struct ttm_operation_ctx; /** * struct ttm_pool_type - Pool for a certain memory type * * @pool: the pool we belong to, might be NULL for the global ones * @order: the allocation order our pages have * @caching: the caching type our pages have * @shrinker_list: our place on the global shrinker list * @lock: protection of the page list * @pages: the list of pages in the pool */ struct ttm_pool_type { struct ttm_pool *pool; unsigned int order; enum ttm_caching caching; struct list_head shrinker_list; spinlock_t lock; struct list_head pages; }; /** * struct ttm_pool - Pool for all caching and orders * * @dev: the device we allocate pages for * @nid: which numa node to use * @use_dma_alloc: if coherent DMA allocations should be used * @use_dma32: if GFP_DMA32 should be used * @caching: pools for each caching/order */ struct ttm_pool { struct device *dev; int nid; bool use_dma_alloc; bool use_dma32; struct { struct ttm_pool_type orders[MAX_ORDER + 1]; } caching[TTM_NUM_CACHING_TYPES]; }; int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt, struct ttm_operation_ctx *ctx); void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt); void ttm_pool_init(struct ttm_pool *pool, struct device *dev, int nid, bool use_dma_alloc, bool use_dma32); void ttm_pool_fini(struct ttm_pool *pool); int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m); int ttm_pool_mgr_init(unsigned long num_pages); void ttm_pool_mgr_fini(void); #endif