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
23struct 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 */
34struct gen_ch_map {
35	int ch_off;
36	int nr_luns;
37	int *lun_offs;
38};
39
40struct gen_dev_map {
41	struct gen_ch_map *chnls;
42	int nr_chnls;
43};
44
45struct gen_area {
46	struct list_head list;
47	sector_t begin;
48	sector_t end;	/* end is excluded */
49};
50
51static inline void *ch_map_to_lun_offs(struct gen_ch_map *ch_map)
52{
53	return ch_map + 1;
54}
55
56typedef 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_ */