diff options
Diffstat (limited to 'drivers/block/zram/zcomp.h')
| -rw-r--r-- | drivers/block/zram/zcomp.h | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/block/zram/zcomp.h b/drivers/block/zram/zcomp.h index 1d8920c2d449..ad5762813842 100644 --- a/drivers/block/zram/zcomp.h +++ b/drivers/block/zram/zcomp.h @@ -7,10 +7,18 @@ #define ZCOMP_PARAM_NO_LEVEL INT_MIN +/* + * Immutable driver (backend) parameters. The driver may attach private + * data to it (e.g. driver representation of the dictionary, etc.). + * + * This data is kept per-comp and is shared among execution contexts. + */ struct zcomp_params { void *dict; size_t dict_sz; s32 level; + + void *drv_data; }; /* @@ -38,13 +46,17 @@ struct zcomp_req { }; struct zcomp_ops { - int (*compress)(struct zcomp_ctx *ctx, struct zcomp_req *req); - int (*decompress)(struct zcomp_ctx *ctx, struct zcomp_req *req); + int (*compress)(struct zcomp_params *params, struct zcomp_ctx *ctx, + struct zcomp_req *req); + int (*decompress)(struct zcomp_params *params, struct zcomp_ctx *ctx, + struct zcomp_req *req); - int (*create_ctx)(struct zcomp_params *params, - struct zcomp_ctx *ctx); + int (*create_ctx)(struct zcomp_params *params, struct zcomp_ctx *ctx); void (*destroy_ctx)(struct zcomp_ctx *ctx); + int (*setup_params)(struct zcomp_params *params); + void (*release_params)(struct zcomp_params *params); + const char *name; }; |