1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 2 /* 3 * Copyright 2020 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: Christian König 24 */ 25 26 #ifndef _TTM_PAGE_POOL_H_ 27 #define _TTM_PAGE_POOL_H_ 28 29 #include <linux/mmzone.h> 30 #include <linux/llist.h> 31 #include <linux/spinlock.h> 32 #include <linux/list_lru.h> 33 #include <drm/ttm/ttm_caching.h> 34 35 struct device; 36 struct seq_file; 37 struct ttm_backup_flags; 38 struct ttm_operation_ctx; 39 struct ttm_pool; 40 struct ttm_tt; 41 42 /** 43 * struct ttm_pool_type - Pool for a certain memory type 44 * 45 * @pool: the pool we belong to, might be NULL for the global ones 46 * @order: the allocation order our pages have 47 * @caching: the caching type our pages have 48 * @shrinker_list: our place on the global shrinker list 49 * @pages: the lru_list of pages in the pool 50 */ 51 struct ttm_pool_type { 52 struct ttm_pool *pool; 53 unsigned int order; 54 enum ttm_caching caching; 55 56 struct list_head shrinker_list; 57 58 struct list_lru pages; 59 }; 60 61 /** 62 * struct ttm_pool - Pool for all caching and orders 63 * 64 * @dev: the device we allocate pages for 65 * @nid: which numa node to use 66 * @alloc_flags: TTM_ALLOCATION_POOL_* flags 67 * @caching: pools for each caching/order 68 */ 69 struct ttm_pool { 70 struct device *dev; 71 int nid; 72 73 unsigned int alloc_flags; 74 75 struct { 76 struct ttm_pool_type orders[NR_PAGE_ORDERS]; 77 } caching[TTM_NUM_CACHING_TYPES]; 78 }; 79 80 int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt, 81 struct ttm_operation_ctx *ctx); 82 void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt); 83 84 void ttm_pool_init(struct ttm_pool *pool, struct device *dev, 85 int nid, unsigned int alloc_flags); 86 void ttm_pool_fini(struct ttm_pool *pool); 87 88 int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m); 89 90 void ttm_pool_drop_backed_up(struct ttm_tt *tt); 91 92 long ttm_pool_backup(struct ttm_pool *pool, struct ttm_tt *ttm, 93 const struct ttm_backup_flags *flags); 94 int ttm_pool_restore_and_alloc(struct ttm_pool *pool, struct ttm_tt *tt, 95 const struct ttm_operation_ctx *ctx); 96 97 int ttm_pool_mgr_init(unsigned long num_pages); 98 void ttm_pool_mgr_fini(void); 99 100 #endif 101