[mirror_ubuntu-zesty-kernel.git] / drivers / lightnvm / gennvm.h

/*
 * Copyright: Matias Bjorling <mb@bjorling.me>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 */

#ifndef GENNVM_H_
#define GENNVM_H_

#include <linux/module.h>
#include <linux/vmalloc.h>

#include <linux/lightnvm.h>

struct gen_dev {
	struct nvm_dev *dev;

	int nr_luns;
	struct list_head area_list;

	struct mutex lock;
	struct list_head targets;
};

/* Map between virtual and physical channel and lun */
struct gen_ch_map {
	int ch_off;
	int nr_luns;
	int *lun_offs;
};

struct gen_dev_map {
	struct gen_ch_map *chnls;
	int nr_chnls;
};

struct gen_area {
	struct list_head list;
	sector_t begin;
	sector_t end;	/* end is excluded */
};

static inline void *ch_map_to_lun_offs(struct gen_ch_map *ch_map)
{
	return ch_map + 1;
}

typedef int (gen_trans_fn)(struct nvm_tgt_dev *, struct ppa_addr *);

#define gen_for_each_lun(bm, lun, i) \
		for ((i) = 0, lun = &(bm)->luns[0]; \
			(i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)])

#endif /* GENNVM_H_ */
Commit	Line	Data
48add0f5 MB	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
5e60edb7	23	struct gen_dev {
11450469 MB	24	struct nvm_dev *dev;
11450469 MB	25
48add0f5	26	int nr_luns;
4c9dacb8	27	struct list_head area_list;
b76eb20b MB	28
	29	struct mutex lock;
	30	struct list_head targets;
48add0f5 MB	31	};
48add0f5 MB	32
8e53624d JG	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
5e60edb7	45	struct gen_area {
4c9dacb8 WT	46	struct list_head list;
	47	sector_t begin;
	48	sector_t end; /* end is excluded */
	49	};
5e60edb7	50
8e53624d JG	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
5e60edb7	58	#define gen_for_each_lun(bm, lun, i) \
48add0f5 MB	59	for ((i) = 0, lun = &(bm)->luns[0]; \
	60	(i) < (bm)->nr_luns; (i)++, lun = &(bm)->luns[(i)])
	61
	62	#endif /* GENNVM_H_ */