diff options
Diffstat (limited to 'include/linux/genalloc.h')
| -rw-r--r-- | include/linux/genalloc.h | 53 |
1 files changed, 51 insertions, 2 deletions
diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h index 5e98eeb2af3..1c2fdaa2ffc 100644 --- a/include/linux/genalloc.h +++ b/include/linux/genalloc.h @@ -29,6 +29,26 @@ #ifndef __GENALLOC_H__ #define __GENALLOC_H__ + +#include <linux/spinlock_types.h> + +struct device; +struct device_node; + +/** + * Allocation callback function type definition + * @map: Pointer to bitmap + * @size: The bitmap size in bits + * @start: The bitnumber to start searching at + * @nr: The number of zeroed bits we're looking for + * @data: optional additional data used by @genpool_algo_t + */ +typedef unsigned long (*genpool_algo_t)(unsigned long *map, + unsigned long size, + unsigned long start, + unsigned int nr, + void *data); + /* * General purpose special memory pool descriptor. */ @@ -36,6 +56,9 @@ struct gen_pool { spinlock_t lock; struct list_head chunks; /* list of chunks in this pool */ int min_alloc_order; /* minimum allocation order */ + + genpool_algo_t algo; /* allocation function */ + void *data; }; /* @@ -45,8 +68,8 @@ struct gen_pool_chunk { struct list_head next_chunk; /* next chunk in pool */ atomic_t avail; phys_addr_t phys_addr; /* physical starting address of memory chunk */ - unsigned long start_addr; /* starting address of memory chunk */ - unsigned long end_addr; /* ending address of memory chunk */ + unsigned long start_addr; /* start address of memory chunk */ + unsigned long end_addr; /* end address of memory chunk (inclusive) */ unsigned long bits[0]; /* bitmap for allocating memory chunk */ }; @@ -73,9 +96,35 @@ static inline int gen_pool_add(struct gen_pool *pool, unsigned long addr, } extern void gen_pool_destroy(struct gen_pool *); extern unsigned long gen_pool_alloc(struct gen_pool *, size_t); +extern void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, + dma_addr_t *dma); extern void gen_pool_free(struct gen_pool *, unsigned long, size_t); extern void gen_pool_for_each_chunk(struct gen_pool *, void (*)(struct gen_pool *, struct gen_pool_chunk *, void *), void *); extern size_t gen_pool_avail(struct gen_pool *); extern size_t gen_pool_size(struct gen_pool *); + +extern void gen_pool_set_algo(struct gen_pool *pool, genpool_algo_t algo, + void *data); + +extern unsigned long gen_pool_first_fit(unsigned long *map, unsigned long size, + unsigned long start, unsigned int nr, void *data); + +extern unsigned long gen_pool_best_fit(unsigned long *map, unsigned long size, + unsigned long start, unsigned int nr, void *data); + +extern struct gen_pool *devm_gen_pool_create(struct device *dev, + int min_alloc_order, int nid); +extern struct gen_pool *dev_get_gen_pool(struct device *dev); + +#ifdef CONFIG_OF +extern struct gen_pool *of_get_named_gen_pool(struct device_node *np, + const char *propname, int index); +#else +static inline struct gen_pool *of_get_named_gen_pool(struct device_node *np, + const char *propname, int index) +{ + return NULL; +} +#endif #endif /* __GENALLOC_H__ */ |