staging: ramster: ramster-specific changes to zcache/tmem

[karo-tx-linux.git] / drivers / staging / ramster / tmem.h

diff --git a/drivers/staging/ramster/tmem.h b/drivers/staging/ramster/tmem.h
index ed147c4b110d41b8f7febbb9b5efcb0ce3666f0e..47f1918c8314d32740ee653d0f9f7ad8a3760cb4 100644 (file)
--- a/drivers/staging/ramster/tmem.h
+++ b/drivers/staging/ramster/tmem.h
@@ -9,7 +9,6 @@
 #ifndef _TMEM_H_
 #define _TMEM_H_
 
-#include <linux/types.h>
 #include <linux/highmem.h>
 #include <linux/hash.h>
 #include <linux/atomic.h>
@@ -89,6 +88,31 @@ struct tmem_oid {
        uint64_t oid[3];
 };
 
+struct tmem_xhandle {
+       uint8_t client_id;
+       uint8_t xh_data_cksum;
+       uint16_t xh_data_size;
+       uint16_t pool_id;
+       struct tmem_oid oid;
+       uint32_t index;
+       void *extra;
+};
+
+static inline struct tmem_xhandle tmem_xhandle_fill(uint16_t client_id,
+                                       struct tmem_pool *pool,
+                                       struct tmem_oid *oidp,
+                                       uint32_t index)
+{
+       struct tmem_xhandle xh;
+       xh.client_id = client_id;
+       xh.xh_data_cksum = (uint8_t)-1;
+       xh.xh_data_size = (uint16_t)-1;
+       xh.pool_id = pool->pool_id;
+       xh.oid = *oidp;
+       xh.index = index;
+       return xh;
+}
+
 static inline void tmem_oid_set_invalid(struct tmem_oid *oidp)
 {
        oidp->oid[0] = oidp->oid[1] = oidp->oid[2] = -1UL;
@@ -147,7 +171,11 @@ struct tmem_obj {
        unsigned int objnode_tree_height;
        unsigned long objnode_count;
        long pampd_count;
-       void *extra; /* for private use by pampd implementation */
+       /* for current design of ramster, all pages belonging to
+        * an object reside on the same remotenode and extra is
+        * used to record the number of the remotenode so a
+        * flush-object operation can specify it */
+       void *extra; /* for use by pampd implementation */
        DECL_SENTINEL
 };
 
@@ -174,9 +202,14 @@ struct tmem_pamops {
        int (*get_data_and_free)(char *, size_t *, bool, void *,
                                struct tmem_pool *, struct tmem_oid *,
                                uint32_t);
-       void (*free)(void *, struct tmem_pool *, struct tmem_oid *, uint32_t);
+       void (*free)(void *, struct tmem_pool *,
+                               struct tmem_oid *, uint32_t, bool);
        void (*free_obj)(struct tmem_pool *, struct tmem_obj *);
        bool (*is_remote)(void *);
+       void *(*repatriate_preload)(void *, struct tmem_pool *,
+                                       struct tmem_oid *, uint32_t, bool *);
+       int (*repatriate)(void *, void *, struct tmem_pool *,
+                               struct tmem_oid *, uint32_t, bool, void *);
        void (*new_obj)(struct tmem_obj *);
        int (*replace_in_obj)(void *, struct tmem_obj *);
 };
@@ -193,11 +226,16 @@ extern void tmem_register_hostops(struct tmem_hostops *m);
 
 /* core tmem accessor functions */
 extern int tmem_put(struct tmem_pool *, struct tmem_oid *, uint32_t index,
-                       char *, size_t, bool, bool);
+                       char *, size_t, bool, int);
 extern int tmem_get(struct tmem_pool *, struct tmem_oid *, uint32_t index,
                        char *, size_t *, bool, int);
 extern int tmem_replace(struct tmem_pool *, struct tmem_oid *, uint32_t index,
                        void *);
+extern void *tmem_localify_get_pampd(struct tmem_pool *, struct tmem_oid *,
+                                  uint32_t index, struct tmem_obj **,
+                                  void **);
+extern void tmem_localify_finish(struct tmem_obj *, uint32_t index,
+                                void *, void *, bool);
 extern int tmem_flush_page(struct tmem_pool *, struct tmem_oid *,
                        uint32_t index);
 extern int tmem_flush_object(struct tmem_pool *, struct tmem_oid *);