Edit File: ttm_memory.h
/************************************************************************** * * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA * All Rights Reserved. * * 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, sub license, 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 (including the * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. * **************************************************************************/ #ifndef TTM_MEMORY_H #define TTM_MEMORY_H #include <linux/workqueue.h> #include <linux/spinlock.h> #include <linux/bug.h> #include <linux/wait.h> #include <linux/errno.h> #include <linux/kobject.h> #include <linux/mm.h> #include "ttm_bo_api.h" /** * struct ttm_mem_global - Global memory accounting structure. * * @shrink: A single callback to shrink TTM memory usage. Extend this * to a linked list to be able to handle multiple callbacks when needed. * @swap_queue: A workqueue to handle shrinking in low memory situations. We * need a separate workqueue since it will spend a lot of time waiting * for the GPU, and this will otherwise block other workqueue tasks(?) * At this point we use only a single-threaded workqueue. * @work: The workqueue callback for the shrink queue. * @lock: Lock to protect the @shrink - and the memory accounting members, * that is, essentially the whole structure with some exceptions. * @lower_mem_limit: include lower limit of swap space and lower limit of * system memory. * @zones: Array of pointers to accounting zones. * @num_zones: Number of populated entries in the @zones array. * @zone_kernel: Pointer to the kernel zone. * @zone_highmem: Pointer to the highmem zone if there is one. * @zone_dma32: Pointer to the dma32 zone if there is one. * * Note that this structure is not per device. It should be global for all * graphics devices. */ #define TTM_MEM_MAX_ZONES 2 struct ttm_mem_zone; extern struct ttm_mem_global { struct kobject kobj; struct ttm_bo_global *bo_glob; struct workqueue_struct *swap_queue; struct work_struct work; spinlock_t lock; uint64_t lower_mem_limit; struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES]; unsigned int num_zones; struct ttm_mem_zone *zone_kernel; #ifdef CONFIG_HIGHMEM struct ttm_mem_zone *zone_highmem; #else struct ttm_mem_zone *zone_dma32; #endif } ttm_mem_glob; extern int ttm_mem_global_init(struct ttm_mem_global *glob); extern void ttm_mem_global_release(struct ttm_mem_global *glob); extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory, struct ttm_operation_ctx *ctx); extern void ttm_mem_global_free(struct ttm_mem_global *glob, uint64_t amount); extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob, struct page *page, uint64_t size, struct ttm_operation_ctx *ctx); extern void ttm_mem_global_free_page(struct ttm_mem_global *glob, struct page *page, uint64_t size); extern size_t ttm_round_pot(size_t size); extern uint64_t ttm_get_kernel_zone_memory_size(struct ttm_mem_global *glob); extern bool ttm_check_under_lowerlimit(struct ttm_mem_global *glob, uint64_t num_pages, struct ttm_operation_ctx *ctx); #endif