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111 lines
3.3 KiB
111 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* memory buffer pool support |
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*/ |
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#ifndef _LINUX_MEMPOOL_H |
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#define _LINUX_MEMPOOL_H |
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#include <linux/wait.h> |
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#include <linux/compiler.h> |
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struct kmem_cache; |
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typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data); |
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typedef void (mempool_free_t)(void *element, void *pool_data); |
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typedef struct mempool_s { |
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spinlock_t lock; |
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int min_nr; /* nr of elements at *elements */ |
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int curr_nr; /* Current nr of elements at *elements */ |
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void **elements; |
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void *pool_data; |
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mempool_alloc_t *alloc; |
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mempool_free_t *free; |
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wait_queue_head_t wait; |
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} mempool_t; |
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static inline bool mempool_initialized(mempool_t *pool) |
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{ |
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return pool->elements != NULL; |
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} |
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void mempool_exit(mempool_t *pool); |
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int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn, |
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mempool_free_t *free_fn, void *pool_data, |
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gfp_t gfp_mask, int node_id); |
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int mempool_init(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn, |
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mempool_free_t *free_fn, void *pool_data); |
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extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn, |
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mempool_free_t *free_fn, void *pool_data); |
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extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn, |
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mempool_free_t *free_fn, void *pool_data, |
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gfp_t gfp_mask, int nid); |
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extern int mempool_resize(mempool_t *pool, int new_min_nr); |
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extern void mempool_destroy(mempool_t *pool); |
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extern void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask) __malloc; |
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extern void mempool_free(void *element, mempool_t *pool); |
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/* |
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* A mempool_alloc_t and mempool_free_t that get the memory from |
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* a slab cache that is passed in through pool_data. |
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* Note: the slab cache may not have a ctor function. |
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*/ |
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void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data); |
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void mempool_free_slab(void *element, void *pool_data); |
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static inline int |
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mempool_init_slab_pool(mempool_t *pool, int min_nr, struct kmem_cache *kc) |
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{ |
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return mempool_init(pool, min_nr, mempool_alloc_slab, |
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mempool_free_slab, (void *) kc); |
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} |
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static inline mempool_t * |
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mempool_create_slab_pool(int min_nr, struct kmem_cache *kc) |
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{ |
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return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab, |
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(void *) kc); |
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} |
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/* |
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* a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the |
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* amount of memory specified by pool_data |
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*/ |
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void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data); |
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void mempool_kfree(void *element, void *pool_data); |
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static inline int mempool_init_kmalloc_pool(mempool_t *pool, int min_nr, size_t size) |
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{ |
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return mempool_init(pool, min_nr, mempool_kmalloc, |
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mempool_kfree, (void *) size); |
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} |
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static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size) |
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{ |
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return mempool_create(min_nr, mempool_kmalloc, mempool_kfree, |
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(void *) size); |
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} |
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/* |
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* A mempool_alloc_t and mempool_free_t for a simple page allocator that |
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* allocates pages of the order specified by pool_data |
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*/ |
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void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data); |
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void mempool_free_pages(void *element, void *pool_data); |
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static inline int mempool_init_page_pool(mempool_t *pool, int min_nr, int order) |
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{ |
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return mempool_init(pool, min_nr, mempool_alloc_pages, |
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mempool_free_pages, (void *)(long)order); |
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} |
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static inline mempool_t *mempool_create_page_pool(int min_nr, int order) |
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{ |
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return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages, |
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(void *)(long)order); |
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} |
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#endif /* _LINUX_MEMPOOL_H */
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