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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mempool.h (3430B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * memory buffer pool support
      4 */
      5#ifndef _LINUX_MEMPOOL_H
      6#define _LINUX_MEMPOOL_H
      7
      8#include <linux/wait.h>
      9#include <linux/compiler.h>
     10
     11struct kmem_cache;
     12
     13typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data);
     14typedef void (mempool_free_t)(void *element, void *pool_data);
     15
     16typedef struct mempool_s {
     17	spinlock_t lock;
     18	int min_nr;		/* nr of elements at *elements */
     19	int curr_nr;		/* Current nr of elements at *elements */
     20	void **elements;
     21
     22	void *pool_data;
     23	mempool_alloc_t *alloc;
     24	mempool_free_t *free;
     25	wait_queue_head_t wait;
     26} mempool_t;
     27
     28static inline bool mempool_initialized(mempool_t *pool)
     29{
     30	return pool->elements != NULL;
     31}
     32
     33void mempool_exit(mempool_t *pool);
     34int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
     35		      mempool_free_t *free_fn, void *pool_data,
     36		      gfp_t gfp_mask, int node_id);
     37int mempool_init(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
     38		 mempool_free_t *free_fn, void *pool_data);
     39
     40extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
     41			mempool_free_t *free_fn, void *pool_data);
     42extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
     43			mempool_free_t *free_fn, void *pool_data,
     44			gfp_t gfp_mask, int nid);
     45
     46extern int mempool_resize(mempool_t *pool, int new_min_nr);
     47extern void mempool_destroy(mempool_t *pool);
     48extern void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask) __malloc;
     49extern void mempool_free(void *element, mempool_t *pool);
     50
     51/*
     52 * A mempool_alloc_t and mempool_free_t that get the memory from
     53 * a slab cache that is passed in through pool_data.
     54 * Note: the slab cache may not have a ctor function.
     55 */
     56void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
     57void mempool_free_slab(void *element, void *pool_data);
     58
     59static inline int
     60mempool_init_slab_pool(mempool_t *pool, int min_nr, struct kmem_cache *kc)
     61{
     62	return mempool_init(pool, min_nr, mempool_alloc_slab,
     63			    mempool_free_slab, (void *) kc);
     64}
     65
     66static inline mempool_t *
     67mempool_create_slab_pool(int min_nr, struct kmem_cache *kc)
     68{
     69	return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab,
     70			      (void *) kc);
     71}
     72
     73/*
     74 * a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the
     75 * amount of memory specified by pool_data
     76 */
     77void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
     78void mempool_kfree(void *element, void *pool_data);
     79
     80static inline int mempool_init_kmalloc_pool(mempool_t *pool, int min_nr, size_t size)
     81{
     82	return mempool_init(pool, min_nr, mempool_kmalloc,
     83			    mempool_kfree, (void *) size);
     84}
     85
     86static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size)
     87{
     88	return mempool_create(min_nr, mempool_kmalloc, mempool_kfree,
     89			      (void *) size);
     90}
     91
     92/*
     93 * A mempool_alloc_t and mempool_free_t for a simple page allocator that
     94 * allocates pages of the order specified by pool_data
     95 */
     96void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
     97void mempool_free_pages(void *element, void *pool_data);
     98
     99static inline int mempool_init_page_pool(mempool_t *pool, int min_nr, int order)
    100{
    101	return mempool_init(pool, min_nr, mempool_alloc_pages,
    102			    mempool_free_pages, (void *)(long)order);
    103}
    104
    105static inline mempool_t *mempool_create_page_pool(int min_nr, int order)
    106{
    107	return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages,
    108			      (void *)(long)order);
    109}
    110
    111#endif /* _LINUX_MEMPOOL_H */