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_lun {
  24         struct nvm_lun vlun;
  25
  26         int reserved_blocks;
  27         /* lun block lists */
  28         struct list_head used_list;     /* In-use blocks */
  29         struct list_head free_list;     /* Not used blocks i.e. released
  30                                          * and ready for use
  31                                          */
  32         struct list_head bb_list;       /* Bad blocks. Mutually exclusive with
  33                                          * free_list and used_list
  34                                          */
  35 };
  36
  37 struct gen_dev {
  38         struct nvm_dev *dev;
  39
  40         int nr_luns;
  41         struct gen_lun *luns;
  42         struct list_head area_list;
  43
  44         struct mutex lock;
  45         struct list_head targets;
  46 };
  47
  48 struct gen_area {
  49         struct list_head list;
  50         sector_t begin;
  51         sector_t end;   /* end is excluded */
  52 };
  53
  54 #define gen_for_each_lun(bm, lun, i) \
  55                 for ((i) = 0, lun = &(bm)->luns[0]; \
  56                         (i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)])
  57
  58 #endif /* GENNVM_H_ */