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