65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/*
|
|
* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef __NVMAP_PP_H
|
|
#define __NVMAP_PP_H
|
|
|
|
#ifdef CONFIG_NVMAP_PAGE_POOLS
|
|
|
|
struct nvmap_device;
|
|
/*
|
|
* This is the default ratio defining pool size. It can be thought of as pool
|
|
* size in either MB per GB or KB per MB. That means the max this number can
|
|
* be is 1024 (all physical memory - not a very good idea) or 0 (no page pool
|
|
* at all).
|
|
*/
|
|
#define NVMAP_PP_POOL_SIZE (128)
|
|
|
|
#define NVMAP_PP_BIG_PAGE_SIZE (0x10000)
|
|
|
|
struct nvmap_page_pool {
|
|
struct rt_mutex lock;
|
|
u32 count; /* Number of pages in the page & dirty list. */
|
|
u32 max; /* Max no. of pages in all lists. */
|
|
u32 to_zero; /* Number of pages on the zero list */
|
|
u32 under_zero; /* Number of pages getting zeroed */
|
|
u32 big_pg_sz; /* big page size supported(64k, etc.) */
|
|
u32 big_page_count; /* Number of zeroed big pages avaialble */
|
|
u32 pages_per_big_pg; /* Number of pages in big page */
|
|
struct list_head page_list;
|
|
struct list_head zero_list;
|
|
struct list_head page_list_bp;
|
|
|
|
#ifdef CONFIG_NVMAP_PAGE_POOL_DEBUG
|
|
u64 allocs;
|
|
u64 fills;
|
|
u64 hits;
|
|
u64 misses;
|
|
#endif
|
|
};
|
|
|
|
int nvmap_page_pool_init(struct nvmap_device *dev);
|
|
int nvmap_page_pool_fini(struct nvmap_device *dev);
|
|
struct page *nvmap_page_pool_alloc(struct nvmap_page_pool *pool);
|
|
int nvmap_page_pool_alloc_lots(struct nvmap_page_pool *pool,
|
|
struct page **pages, u32 nr);
|
|
int nvmap_page_pool_alloc_lots_bp(struct nvmap_page_pool *pool,
|
|
struct page **pages, u32 nr);
|
|
int nvmap_page_pool_fill_lots(struct nvmap_page_pool *pool,
|
|
struct page **pages, u32 nr);
|
|
int nvmap_page_pool_clear(void);
|
|
int nvmap_page_pool_debugfs_init(struct dentry *nvmap_root);
|
|
#endif
|
|
|
|
#endif /* __NVMAP_PP_H */
|