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genalloc:support memory-allocation with bytes-alignment to genalloc

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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>
This commit is contained in:
Zhao Qiang
2015-11-30 10:48:52 +08:00
committed by Scott Wood
parent e9d764f803
commit de2dd0eb30
2 changed files with 78 additions and 10 deletions
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27
include/linux/genalloc.h
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@@ -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);