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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright 2020 Advanced Micro Devices, Inc.
*
* 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, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: Christian König
*/
#ifndef _TTM_PAGE_POOL_H_
#define _TTM_PAGE_POOL_H_
#include <linux/mmzone.h>
#include <linux/llist.h>
#include <linux/spinlock.h>
#include <drm/ttm/ttm_caching.h>
struct device;
struct ttm_tt;
struct ttm_pool;
struct ttm_operation_ctx;
/**
* struct ttm_pool_type - Pool for a certain memory type
*
* @pool: the pool we belong to, might be NULL for the global ones
* @order: the allocation order our pages have
* @caching: the caching type our pages have
* @shrinker_list: our place on the global shrinker list
* @lock: protection of the page list
* @pages: the list of pages in the pool
*/
struct ttm_pool_type {
struct ttm_pool *pool;
unsigned int order;
enum ttm_caching caching;
struct list_head shrinker_list;
spinlock_t lock;
struct list_head pages;
};
/**
* struct ttm_pool - Pool for all caching and orders
*
* @dev: the device we allocate pages for
* @use_dma_alloc: if coherent DMA allocations should be used
* @use_dma32: if GFP_DMA32 should be used
* @caching: pools for each caching/order
*/
struct ttm_pool {
struct device *dev;
bool use_dma_alloc;
bool use_dma32;
struct {
struct ttm_pool_type orders[MAX_ORDER];
} caching[TTM_NUM_CACHING_TYPES];
};
int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
struct ttm_operation_ctx *ctx);
void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt);
void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
bool use_dma_alloc, bool use_dma32);
void ttm_pool_fini(struct ttm_pool *pool);
int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m);
int ttm_pool_mgr_init(unsigned long num_pages);
void ttm_pool_mgr_fini(void);
#endif
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