1*4882a593Smuzhiyun /************************************************************************** 2*4882a593Smuzhiyun * 3*4882a593Smuzhiyun * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA 4*4882a593Smuzhiyun * All Rights Reserved. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a 7*4882a593Smuzhiyun * copy of this software and associated documentation files (the 8*4882a593Smuzhiyun * "Software"), to deal in the Software without restriction, including 9*4882a593Smuzhiyun * without limitation the rights to use, copy, modify, merge, publish, 10*4882a593Smuzhiyun * distribute, sub license, and/or sell copies of the Software, and to 11*4882a593Smuzhiyun * permit persons to whom the Software is furnished to do so, subject to 12*4882a593Smuzhiyun * the following conditions: 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * The above copyright notice and this permission notice (including the 15*4882a593Smuzhiyun * next paragraph) shall be included in all copies or substantial portions 16*4882a593Smuzhiyun * of the Software. 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21*4882a593Smuzhiyun * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22*4882a593Smuzhiyun * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23*4882a593Smuzhiyun * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24*4882a593Smuzhiyun * USE OR OTHER DEALINGS IN THE SOFTWARE. 25*4882a593Smuzhiyun * 26*4882a593Smuzhiyun **************************************************************************/ 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun #ifndef TTM_MEMORY_H 29*4882a593Smuzhiyun #define TTM_MEMORY_H 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #include <linux/workqueue.h> 32*4882a593Smuzhiyun #include <linux/spinlock.h> 33*4882a593Smuzhiyun #include <linux/bug.h> 34*4882a593Smuzhiyun #include <linux/wait.h> 35*4882a593Smuzhiyun #include <linux/errno.h> 36*4882a593Smuzhiyun #include <linux/kobject.h> 37*4882a593Smuzhiyun #include <linux/mm.h> 38*4882a593Smuzhiyun #include "ttm_bo_api.h" 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /** 41*4882a593Smuzhiyun * struct ttm_mem_global - Global memory accounting structure. 42*4882a593Smuzhiyun * 43*4882a593Smuzhiyun * @shrink: A single callback to shrink TTM memory usage. Extend this 44*4882a593Smuzhiyun * to a linked list to be able to handle multiple callbacks when needed. 45*4882a593Smuzhiyun * @swap_queue: A workqueue to handle shrinking in low memory situations. We 46*4882a593Smuzhiyun * need a separate workqueue since it will spend a lot of time waiting 47*4882a593Smuzhiyun * for the GPU, and this will otherwise block other workqueue tasks(?) 48*4882a593Smuzhiyun * At this point we use only a single-threaded workqueue. 49*4882a593Smuzhiyun * @work: The workqueue callback for the shrink queue. 50*4882a593Smuzhiyun * @lock: Lock to protect the @shrink - and the memory accounting members, 51*4882a593Smuzhiyun * that is, essentially the whole structure with some exceptions. 52*4882a593Smuzhiyun * @lower_mem_limit: include lower limit of swap space and lower limit of 53*4882a593Smuzhiyun * system memory. 54*4882a593Smuzhiyun * @zones: Array of pointers to accounting zones. 55*4882a593Smuzhiyun * @num_zones: Number of populated entries in the @zones array. 56*4882a593Smuzhiyun * @zone_kernel: Pointer to the kernel zone. 57*4882a593Smuzhiyun * @zone_highmem: Pointer to the highmem zone if there is one. 58*4882a593Smuzhiyun * @zone_dma32: Pointer to the dma32 zone if there is one. 59*4882a593Smuzhiyun * 60*4882a593Smuzhiyun * Note that this structure is not per device. It should be global for all 61*4882a593Smuzhiyun * graphics devices. 62*4882a593Smuzhiyun */ 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun #define TTM_MEM_MAX_ZONES 2 65*4882a593Smuzhiyun struct ttm_mem_zone; 66*4882a593Smuzhiyun extern struct ttm_mem_global { 67*4882a593Smuzhiyun struct kobject kobj; 68*4882a593Smuzhiyun struct workqueue_struct *swap_queue; 69*4882a593Smuzhiyun struct work_struct work; 70*4882a593Smuzhiyun spinlock_t lock; 71*4882a593Smuzhiyun uint64_t lower_mem_limit; 72*4882a593Smuzhiyun struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES]; 73*4882a593Smuzhiyun unsigned int num_zones; 74*4882a593Smuzhiyun struct ttm_mem_zone *zone_kernel; 75*4882a593Smuzhiyun #ifdef CONFIG_HIGHMEM 76*4882a593Smuzhiyun struct ttm_mem_zone *zone_highmem; 77*4882a593Smuzhiyun #else 78*4882a593Smuzhiyun struct ttm_mem_zone *zone_dma32; 79*4882a593Smuzhiyun #endif 80*4882a593Smuzhiyun } ttm_mem_glob; 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun int ttm_mem_global_init(struct ttm_mem_global *glob); 83*4882a593Smuzhiyun void ttm_mem_global_release(struct ttm_mem_global *glob); 84*4882a593Smuzhiyun int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory, 85*4882a593Smuzhiyun struct ttm_operation_ctx *ctx); 86*4882a593Smuzhiyun void ttm_mem_global_free(struct ttm_mem_global *glob, uint64_t amount); 87*4882a593Smuzhiyun int ttm_mem_global_alloc_page(struct ttm_mem_global *glob, 88*4882a593Smuzhiyun struct page *page, uint64_t size, 89*4882a593Smuzhiyun struct ttm_operation_ctx *ctx); 90*4882a593Smuzhiyun void ttm_mem_global_free_page(struct ttm_mem_global *glob, 91*4882a593Smuzhiyun struct page *page, uint64_t size); 92*4882a593Smuzhiyun size_t ttm_round_pot(size_t size); 93*4882a593Smuzhiyun bool ttm_check_under_lowerlimit(struct ttm_mem_global *glob, uint64_t num_pages, 94*4882a593Smuzhiyun struct ttm_operation_ctx *ctx); 95*4882a593Smuzhiyun #endif 96