LXR linux/include/drm/ttm/ttm

   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
  34struct device;
  35struct ttm_tt;
  36struct ttm_pool;
  37struct ttm_operation_ctx;
  38
  39/**
  40 * ttm_pool_type - Pool for a certain memory type
  41 *
  42 * @pool: the pool we belong to, might be NULL for the global ones
  43 * @order: the allocation order our pages have
  44 * @caching: the caching type our pages have
  45 * @shrinker_list: our place on the global shrinker list
  46 * @lock: protection of the page list
  47 * @pages: the list of pages in the pool
  48 */
  49struct ttm_pool_type {
  50        struct ttm_pool *pool;
  51        unsigned int order;
  52        enum ttm_caching caching;
  53
  54        struct list_head shrinker_list;
  55
  56        spinlock_t lock;
  57        struct list_head pages;
  58};
  59
  60/**
  61 * ttm_pool - Pool for all caching and orders
  62 *
  63 * @use_dma_alloc: if coherent DMA allocations should be used
  64 * @use_dma32: if GFP_DMA32 should be used
  65 * @caching: pools for each caching/order
  66 */
  67struct ttm_pool {
  68        struct device *dev;
  69
  70        bool use_dma_alloc;
  71        bool use_dma32;
  72
  73        struct {
  74                struct ttm_pool_type orders[MAX_ORDER];
  75        } caching[TTM_NUM_CACHING_TYPES];
  76};
  77
  78int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
  79                   struct ttm_operation_ctx *ctx);
  80void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt);
  81
  82void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
  83                   bool use_dma_alloc, bool use_dma32);
  84void ttm_pool_fini(struct ttm_pool *pool);
  85
  86int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m);
  87
  88int ttm_pool_mgr_init(unsigned long num_pages);
  89void ttm_pool_mgr_fini(void);
  90
  91#endif
  92