97 lines
3.9 KiB
C
97 lines
3.9 KiB
C
/**************************************************************************
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*
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* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef TTM_MEMORY_H
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#define TTM_MEMORY_H
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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#include <linux/bug.h>
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#include <linux/wait.h>
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#include <linux/errno.h>
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#include <linux/kobject.h>
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#include <linux/mm.h>
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#include <drm/ttm/ttm_bo_api.h>
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/**
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* struct ttm_mem_global - Global memory accounting structure.
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*
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* @shrink: A single callback to shrink TTM memory usage. Extend this
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* to a linked list to be able to handle multiple callbacks when needed.
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* @swap_queue: A workqueue to handle shrinking in low memory situations. We
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* need a separate workqueue since it will spend a lot of time waiting
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* for the GPU, and this will otherwise block other workqueue tasks(?)
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* At this point we use only a single-threaded workqueue.
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* @work: The workqueue callback for the shrink queue.
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* @lock: Lock to protect the @shrink - and the memory accounting members,
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* that is, essentially the whole structure with some exceptions.
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* @lower_mem_limit: include lower limit of swap space and lower limit of
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* system memory.
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* @zones: Array of pointers to accounting zones.
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* @num_zones: Number of populated entries in the @zones array.
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* @zone_kernel: Pointer to the kernel zone.
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* @zone_highmem: Pointer to the highmem zone if there is one.
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* @zone_dma32: Pointer to the dma32 zone if there is one.
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*
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* Note that this structure is not per device. It should be global for all
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* graphics devices.
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*/
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#define TTM_MEM_MAX_ZONES 2
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struct ttm_mem_zone;
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extern struct ttm_mem_global {
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struct kobject kobj;
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struct workqueue_struct *swap_queue;
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struct work_struct work;
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spinlock_t lock;
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uint64_t lower_mem_limit;
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struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES];
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unsigned int num_zones;
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struct ttm_mem_zone *zone_kernel;
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#ifdef CONFIG_HIGHMEM
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struct ttm_mem_zone *zone_highmem;
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#else
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struct ttm_mem_zone *zone_dma32;
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#endif
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} ttm_mem_glob;
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int ttm_mem_global_init(struct ttm_mem_global *glob, struct device *dev);
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void ttm_mem_global_release(struct ttm_mem_global *glob);
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int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
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struct ttm_operation_ctx *ctx);
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void ttm_mem_global_free(struct ttm_mem_global *glob, uint64_t amount);
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int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
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struct page *page, uint64_t size,
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struct ttm_operation_ctx *ctx);
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void ttm_mem_global_free_page(struct ttm_mem_global *glob,
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struct page *page, uint64_t size);
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size_t ttm_round_pot(size_t size);
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bool ttm_check_under_lowerlimit(struct ttm_mem_global *glob, uint64_t num_pages,
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struct ttm_operation_ctx *ctx);
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#endif
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