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| author | Zhao Qiang <qiang.zhao@freescale.com> | 2015-11-30 10:48:52 +0800 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-12-22 17:10:17 -0600 |
| commit | de2dd0eb30af55d3893979d5641c50c7a8969c99 (patch) | |
| tree | dcfd94f13f29b4ad8bcf32b2849876467aa3626c /include/linux/genalloc.h | |
| parent | e9d764f803964a54ca7da4a67d124fe824ebd80a (diff) | |
| download | lwn-de2dd0eb30af55d3893979d5641c50c7a8969c99.tar.gz lwn-de2dd0eb30af55d3893979d5641c50c7a8969c99.zip | |
genalloc:support memory-allocation with bytes-alignment to genalloc
Bytes alignment is required to manage some special RAM,
so add gen_pool_first_fit_align to genalloc,
meanwhile add gen_pool_alloc_algo to pass algo in case user
layer using more than one algo, and pass data to
gen_pool_first_fit_align(modify gen_pool_alloc as a wrapper)
Signed-off-by: Zhao Qiang <qiang.zhao@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'include/linux/genalloc.h')
| -rw-r--r-- | include/linux/genalloc.h | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h index 7ff168d06967..3c676ce46ee0 100644 --- a/include/linux/genalloc.h +++ b/include/linux/genalloc.h @@ -30,10 +30,12 @@ #ifndef __GENALLOC_H__ #define __GENALLOC_H__ +#include <linux/types.h> #include <linux/spinlock_types.h> struct device; struct device_node; +struct gen_pool; /** * Allocation callback function type definition @@ -47,7 +49,7 @@ typedef unsigned long (*genpool_algo_t)(unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, - void *data); + void *data, struct gen_pool *pool); /* * General purpose special memory pool descriptor. @@ -75,6 +77,13 @@ struct gen_pool_chunk { unsigned long bits[0]; /* bitmap for allocating memory chunk */ }; +/* + * gen_pool data descriptor for gen_pool_first_fit_align. + */ +struct genpool_data_align { + int align; /* alignment by bytes for starting address */ +}; + extern struct gen_pool *gen_pool_create(int, int); extern phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long); extern int gen_pool_add_virt(struct gen_pool *, unsigned long, phys_addr_t, @@ -98,6 +107,8 @@ 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 unsigned long gen_pool_alloc_algo(struct gen_pool *, size_t, + genpool_algo_t algo, void *data); 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); @@ -110,14 +121,22 @@ 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); + unsigned long start, unsigned int nr, void *data, + struct gen_pool *pool); + +extern unsigned long gen_pool_first_fit_align(unsigned long *map, + unsigned long size, unsigned long start, unsigned int nr, + void *data, struct gen_pool *pool); + extern unsigned long gen_pool_first_fit_order_align(unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, - void *data); + void *data, struct gen_pool *pool); extern unsigned long gen_pool_best_fit(unsigned long *map, unsigned long size, - unsigned long start, unsigned int nr, void *data); + unsigned long start, unsigned int nr, void *data, + struct gen_pool *pool); + extern struct gen_pool *devm_gen_pool_create(struct device *dev, int min_alloc_order, int nid, const char *name); |