cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ttm_pool.h (2877B)

      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 * struct 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 * struct ttm_pool - Pool for all caching and orders
     62 *
     63 * @dev: the device we allocate pages for
     64 * @use_dma_alloc: if coherent DMA allocations should be used
     65 * @use_dma32: if GFP_DMA32 should be used
     66 * @caching: pools for each caching/order
     67 */
     68struct ttm_pool {
     69	struct device *dev;
     70
     71	bool use_dma_alloc;
     72	bool use_dma32;
     73
     74	struct {
     75		struct ttm_pool_type orders[MAX_ORDER];
     76	} caching[TTM_NUM_CACHING_TYPES];
     77};
     78
     79int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
     80		   struct ttm_operation_ctx *ctx);
     81void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt);
     82
     83void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
     84		   bool use_dma_alloc, bool use_dma32);
     85void ttm_pool_fini(struct ttm_pool *pool);
     86
     87int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m);
     88
     89int ttm_pool_mgr_init(unsigned long num_pages);
     90void ttm_pool_mgr_fini(void);
     91
     92#endif