drivers/staging/ramster/zcache.h

   1
   2 /*
   3  * zcache.h
   4  *
   5  * Copyright (c) 2012, Dan Magenheimer, Oracle Corp.
   6  */
   7
   8 #ifndef _ZCACHE_H_
   9 #define _ZCACHE_H_
  10
  11 struct zcache_preload {
  12         struct tmem_obj *obj;
  13         struct tmem_objnode *objnodes[OBJNODE_TREE_MAX_PATH];
  14 };
  15
  16 struct tmem_pool;
  17
  18 #define MAX_POOLS_PER_CLIENT 16
  19
  20 #define MAX_CLIENTS 16
  21 #define LOCAL_CLIENT ((uint16_t)-1)
  22
  23 struct zcache_client {
  24         struct tmem_pool *tmem_pools[MAX_POOLS_PER_CLIENT];
  25         bool allocated;
  26         atomic_t refcount;
  27 };
  28
  29 extern struct tmem_pool *zcache_get_pool_by_id(uint16_t cli_id,
  30                                                         uint16_t poolid);
  31 extern void zcache_put_pool(struct tmem_pool *pool);
  32
  33 extern int zcache_put_page(int, int, struct tmem_oid *,
  34                                 uint32_t, void *,
  35                                 unsigned int, bool, int);
  36 extern int zcache_get_page(int, int, struct tmem_oid *, uint32_t,
  37                                 void *, size_t *, bool, int);
  38 extern int zcache_flush_page(int, int, struct tmem_oid *, uint32_t);
  39 extern int zcache_flush_object(int, int, struct tmem_oid *);
  40 extern void zcache_decompress_to_page(char *, unsigned int, struct page *);
  41
  42 #ifdef CONFIG_RAMSTER
  43 extern void *zcache_pampd_create(char *, unsigned int, bool, int,
  44                                 struct tmem_handle *);
  45 int zcache_autocreate_pool(unsigned int cli_id, unsigned int pool_id, bool eph);
  46 #endif
  47
  48 #define MAX_POOLS_PER_CLIENT 16
  49
  50 #define MAX_CLIENTS 16
  51 #define LOCAL_CLIENT ((uint16_t)-1)
  52
  53 #endif /* _ZCACHE_H_ */