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 <drm/ttm/ttm_caching.h> 33 34 struct device; 35 struct seq_file; 36 struct ttm_operation_ctx; 37 struct ttm_pool; 38 struct ttm_tt; 39 40 /** 41 * struct ttm_pool_type - Pool for a certain memory type 42 * 43 * @pool: the pool we belong to, might be NULL for the global ones 44 * @order: the allocation order our pages have 45 * @caching: the caching type our pages have 46 * @shrinker_list: our place on the global shrinker list 47 * @lock: protection of the page list 48 * @pages: the list of pages in the pool 49 */ 50 struct ttm_pool_type { 51 struct ttm_pool *pool; 52 unsigned int order; 53 enum ttm_caching caching; 54 55 struct list_head shrinker_list; 56 57 spinlock_t lock; 58 struct list_head 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 * @use_dma_alloc: if coherent DMA allocations should be used 67 * @use_dma32: if GFP_DMA32 should be used 68 * @caching: pools for each caching/order 69 */ 70 struct ttm_pool { 71 struct device *dev; 72 int nid; 73 74 bool use_dma_alloc; 75 bool use_dma32; 76 77 struct { 78 struct ttm_pool_type orders[NR_PAGE_ORDERS]; 79 } caching[TTM_NUM_CACHING_TYPES]; 80 }; 81 82 int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt, 83 struct ttm_operation_ctx *ctx); 84 void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt); 85 86 void ttm_pool_init(struct ttm_pool *pool, struct device *dev, 87 int nid, bool use_dma_alloc, bool use_dma32); 88 void ttm_pool_fini(struct ttm_pool *pool); 89 90 int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m); 91 92 int ttm_pool_mgr_init(unsigned long num_pages); 93 void ttm_pool_mgr_fini(void); 94 95 #endif 96