drivers/lightnvm/gennvm.h

   1 /*
   2  * Copyright: Matias Bjorling <mb@bjorling.me>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License version
   6  * 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  */
  14
  15 #ifndef GENNVM_H_
  16 #define GENNVM_H_
  17
  18 #include <linux/module.h>
  19 #include <linux/vmalloc.h>
  20
  21 #include <linux/lightnvm.h>
  22
  23 struct gen_dev {
  24         struct nvm_dev *dev;
  25
  26         int nr_luns;
  27         struct list_head area_list;
  28
  29         struct mutex lock;
  30         struct list_head targets;
  31 };
  32
  33 /* Map between virtual and physical channel and lun */
  34 struct gen_ch_map {
  35         int ch_off;
  36         int nr_luns;
  37         int *lun_offs;
  38 };
  39
  40 struct gen_dev_map {
  41         struct gen_ch_map *chnls;
  42         int nr_chnls;
  43 };
  44
  45 struct gen_area {
  46         struct list_head list;
  47         sector_t begin;
  48         sector_t end;   /* end is excluded */
  49 };
  50
  51 static inline void *ch_map_to_lun_offs(struct gen_ch_map *ch_map)
  52 {
  53         return ch_map + 1;
  54 }
  55
  56 typedef int (gen_trans_fn)(struct nvm_tgt_dev *, struct ppa_addr *);
  57
  58 #define gen_for_each_lun(bm, lun, i) \
  59                 for ((i) = 0, lun = &(bm)->luns[0]; \
  60                         (i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)])
  61
  62 #endif /* GENNVM_H_ */