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regmap: Prepare LZO cache for variable block sizes

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Give regcache_lzo_block_count() a copy of the map so that when we decide
we want to make the LZO cache more controllable we can more easily do so.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-10-18 00:37:00 +01:00
parent 1ea6b8f489
commit 82732bdd66
1 changed files with 9 additions and 6 deletions
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15
drivers/base/regmap/regcache-lzo.c
View file

@ -27,7 +27,7 @@ struct regcache_lzo_ctx {
}; };
#define LZO_BLOCK_NUM 8 #define LZO_BLOCK_NUM 8
static int regcache_lzo_block_count(void) static int regcache_lzo_block_count(struct regmap *map)
{ {
return LZO_BLOCK_NUM; return LZO_BLOCK_NUM;
} }
@ -106,19 +106,22 @@ static inline int regcache_lzo_get_blkindex(struct regmap *map,
unsigned int reg) unsigned int reg)
{ {
return (reg * map->cache_word_size) / return (reg * map->cache_word_size) /
DIV_ROUND_UP(map->cache_size_raw, regcache_lzo_block_count()); DIV_ROUND_UP(map->cache_size_raw,
regcache_lzo_block_count(map));
} }
static inline int regcache_lzo_get_blkpos(struct regmap *map, static inline int regcache_lzo_get_blkpos(struct regmap *map,
unsigned int reg) unsigned int reg)
{ {
return reg % (DIV_ROUND_UP(map->cache_size_raw, regcache_lzo_block_count()) / return reg % (DIV_ROUND_UP(map->cache_size_raw,
regcache_lzo_block_count(map)) /
map->cache_word_size); map->cache_word_size);
} }
static inline int regcache_lzo_get_blksize(struct regmap *map) static inline int regcache_lzo_get_blksize(struct regmap *map)
{ {
return DIV_ROUND_UP(map->cache_size_raw, regcache_lzo_block_count()); return DIV_ROUND_UP(map->cache_size_raw,
regcache_lzo_block_count(map));
} }
static int regcache_lzo_init(struct regmap *map) static int regcache_lzo_init(struct regmap *map)
@ -131,7 +134,7 @@ static int regcache_lzo_init(struct regmap *map)
ret = 0; ret = 0;
blkcount = regcache_lzo_block_count(); blkcount = regcache_lzo_block_count(map);
map->cache = kzalloc(blkcount * sizeof *lzo_blocks, map->cache = kzalloc(blkcount * sizeof *lzo_blocks,
GFP_KERNEL); GFP_KERNEL);
if (!map->cache) if (!map->cache)
@ -203,7 +206,7 @@ static int regcache_lzo_exit(struct regmap *map)
if (!lzo_blocks) if (!lzo_blocks)
return 0; return 0;
blkcount = regcache_lzo_block_count(); blkcount = regcache_lzo_block_count(map);
/* /*
* the pointer to the bitmap used for syncing the cache * the pointer to the bitmap used for syncing the cache
* is shared amongst all lzo_blocks. Ensure it is freed * is shared amongst all lzo_blocks. Ensure it is freed