[deliverable/linux.git] / drivers / usb / gadget / function / f_mass_storage.h

#ifndef USB_F_MASS_STORAGE_H
#define USB_F_MASS_STORAGE_H

#include <linux/usb/composite.h>
#include "storage_common.h"

struct fsg_module_parameters {
	char		*file[FSG_MAX_LUNS];
	bool		ro[FSG_MAX_LUNS];
	bool		removable[FSG_MAX_LUNS];
	bool		cdrom[FSG_MAX_LUNS];
	bool		nofua[FSG_MAX_LUNS];

	unsigned int	file_count, ro_count, removable_count, cdrom_count;
	unsigned int	nofua_count;
	unsigned int	luns;	/* nluns */
	bool		stall;	/* can_stall */
};

#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc)	\
	module_param_array_named(prefix ## name, params.name, type,	\
				 &prefix ## params.name ## _count,	\
				 S_IRUGO);				\
	MODULE_PARM_DESC(prefix ## name, desc)

#define _FSG_MODULE_PARAM(prefix, params, name, type, desc)		\
	module_param_named(prefix ## name, params.name, type,		\
			   S_IRUGO);					\
	MODULE_PARM_DESC(prefix ## name, desc)

#define __FSG_MODULE_PARAMETERS(prefix, params)				\
	_FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp,		\
				"names of backing files or devices");	\
	_FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool,		\
				"true to force read-only");		\
	_FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool,	\
				"true to simulate removable media");	\
	_FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool,		\
				"true to simulate CD-ROM instead of disk"); \
	_FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool,		\
				"true to ignore SCSI WRITE(10,12) FUA bit"); \
	_FSG_MODULE_PARAM(prefix, params, luns, uint,			\
			  "number of LUNs");				\
	_FSG_MODULE_PARAM(prefix, params, stall, bool,			\
			  "false to prevent bulk stalls")

#ifdef CONFIG_USB_GADGET_DEBUG_FILES

#define FSG_MODULE_PARAMETERS(prefix, params)				\
	__FSG_MODULE_PARAMETERS(prefix, params);			\
	module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
	MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
#else

#define FSG_MODULE_PARAMETERS(prefix, params)				\
	__FSG_MODULE_PARAMETERS(prefix, params)

#endif

struct fsg_common;

/* FSF callback functions */
struct fsg_operations {
	/*
	 * Callback function to call when thread exits.  If no
	 * callback is set or it returns value lower then zero MSF
	 * will force eject all LUNs it operates on (including those
	 * marked as non-removable or with prevent_medium_removal flag
	 * set).
	 */
	int (*thread_exits)(struct fsg_common *common);
};

struct fsg_lun_opts {
	struct config_group group;
	struct fsg_lun *lun;
	int lun_id;
};

struct fsg_opts {
	struct fsg_common *common;
	struct usb_function_instance func_inst;
	struct fsg_lun_opts lun0;
	struct config_group *default_groups[2];
	bool no_configfs; /* for legacy gadgets */

	/*
	 * Read/write access to configfs attributes is handled by configfs.
	 *
	 * This is to protect the data from concurrent access by read/write
	 * and create symlink/remove symlink.
	 */
	struct mutex			lock;
	int				refcnt;
};

struct fsg_lun_config {
	const char *filename;
	char ro;
	char removable;
	char cdrom;
	char nofua;
	char inquiry_string[INQUIRY_STRING_LEN];
};

struct fsg_config {
	unsigned nluns;
	struct fsg_lun_config luns[FSG_MAX_LUNS];

	/* Callback functions. */
	const struct fsg_operations	*ops;
	/* Gadget's private data. */
	void			*private_data;

	const char *vendor_name;		/*  8 characters or less */
	const char *product_name;		/* 16 characters or less */

	char			can_stall;
	unsigned int		fsg_num_buffers;
};

static inline struct fsg_opts *
fsg_opts_from_func_inst(const struct usb_function_instance *fi)
{
	return container_of(fi, struct fsg_opts, func_inst);
}

void fsg_common_get(struct fsg_common *common);

void fsg_common_put(struct fsg_common *common);

void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs);

int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n);

void fsg_common_free_buffers(struct fsg_common *common);

int fsg_common_set_cdev(struct fsg_common *common,
			struct usb_composite_dev *cdev, bool can_stall);

void fsg_common_remove_lun(struct fsg_lun *lun);

void fsg_common_remove_luns(struct fsg_common *common);

void fsg_common_set_ops(struct fsg_common *common,
			const struct fsg_operations *ops);

int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
			  unsigned int id, const char *name,
			  const char **name_pfx);

int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg);

void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn,
				   const char *pn);

void fsg_config_from_params(struct fsg_config *cfg,
			    const struct fsg_module_parameters *params,
			    unsigned int fsg_num_buffers);

#endif /* USB_F_MASS_STORAGE_H */
Commit	Line	Data
f3fed367 AP	1	#ifndef USB_F_MASS_STORAGE_H
	2	#define USB_F_MASS_STORAGE_H
	3
e5eaa0dc	4	#include <linux/usb/composite.h>
f3fed367 AP	5	#include "storage_common.h"
	6
	7	struct fsg_module_parameters {
	8	char *file[FSG_MAX_LUNS];
	9	bool ro[FSG_MAX_LUNS];
	10	bool removable[FSG_MAX_LUNS];
	11	bool cdrom[FSG_MAX_LUNS];
	12	bool nofua[FSG_MAX_LUNS];
	13
	14	unsigned int file_count, ro_count, removable_count, cdrom_count;
	15	unsigned int nofua_count;
	16	unsigned int luns; /* nluns */
	17	bool stall; /* can_stall */
	18	};
	19
	20	#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc) \
	21	module_param_array_named(prefix ## name, params.name, type, \
	22	&prefix ## params.name ## _count, \
	23	S_IRUGO); \
	24	MODULE_PARM_DESC(prefix ## name, desc)
	25
	26	#define _FSG_MODULE_PARAM(prefix, params, name, type, desc) \
	27	module_param_named(prefix ## name, params.name, type, \
	28	S_IRUGO); \
	29	MODULE_PARM_DESC(prefix ## name, desc)
	30
	31	#define __FSG_MODULE_PARAMETERS(prefix, params) \
	32	_FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp, \
	33	"names of backing files or devices"); \
	34	_FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool, \
	35	"true to force read-only"); \
	36	_FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool, \
	37	"true to simulate removable media"); \
	38	_FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool, \
	39	"true to simulate CD-ROM instead of disk"); \
	40	_FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool, \
	41	"true to ignore SCSI WRITE(10,12) FUA bit"); \
	42	_FSG_MODULE_PARAM(prefix, params, luns, uint, \
	43	"number of LUNs"); \
	44	_FSG_MODULE_PARAM(prefix, params, stall, bool, \
	45	"false to prevent bulk stalls")
	46
	47	#ifdef CONFIG_USB_GADGET_DEBUG_FILES
	48
	49	#define FSG_MODULE_PARAMETERS(prefix, params) \
	50	__FSG_MODULE_PARAMETERS(prefix, params); \
	51	module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
	52	MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
	53	#else
	54
	55	#define FSG_MODULE_PARAMETERS(prefix, params) \
	56	__FSG_MODULE_PARAMETERS(prefix, params)
	57
	58	#endif
	59
	60	struct fsg_common;
	61
	62	/* FSF callback functions */
	63	struct fsg_operations {
	64	/*
	65	* Callback function to call when thread exits. If no
	66	* callback is set or it returns value lower then zero MSF
	67	* will force eject all LUNs it operates on (including those
	68	* marked as non-removable or with prevent_medium_removal flag
69	* set).
70	*/
71	int (thread_exits)(struct fsg_common common);
72	};
73
ef0aa4b9 AP	74	struct fsg_lun_opts {
	75	struct config_group group;
	76	struct fsg_lun *lun;
	77	int lun_id;
	78	};
	79
e5eaa0dc AP	80	struct fsg_opts {
	81	struct fsg_common *common;
	82	struct usb_function_instance func_inst;
ef0aa4b9 AP	83	struct fsg_lun_opts lun0;
ef0aa4b9 AP	84	struct config_group *default_groups[2];
e5eaa0dc	85	bool no_configfs; /* for legacy gadgets */
ef0aa4b9 AP	86
	87	/*
	88	* Read/write access to configfs attributes is handled by configfs.
	89	*
	90	* This is to protect the data from concurrent access by read/write
	91	* and create symlink/remove symlink.
	92	*/
	93	struct mutex lock;
	94	int refcnt;
e5eaa0dc AP	95	};
e5eaa0dc AP	96
f3fed367 AP	97	struct fsg_lun_config {
	98	const char *filename;
	99	char ro;
	100	char removable;
	101	char cdrom;
	102	char nofua;
6ac47090	103	char inquiry_string[INQUIRY_STRING_LEN];
f3fed367 AP	104	};
	105
	106	struct fsg_config {
	107	unsigned nluns;
	108	struct fsg_lun_config luns[FSG_MAX_LUNS];
	109
	110	/* Callback functions. */
	111	const struct fsg_operations *ops;
	112	/* Gadget's private data. */
	113	void *private_data;
	114
	115	const char vendor_name; / 8 characters or less */
	116	const char product_name; / 16 characters or less */
	117
	118	char can_stall;
	119	unsigned int fsg_num_buffers;
	120	};
	121
e5eaa0dc AP	122	static inline struct fsg_opts *
	123	fsg_opts_from_func_inst(const struct usb_function_instance *fi)
	124	{
	125	return container_of(fi, struct fsg_opts, func_inst);
	126	}
	127
f3fed367 AP	128	void fsg_common_get(struct fsg_common *common);
	129
	130	void fsg_common_put(struct fsg_common *common);
	131
bd528d4e AP	132	void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs);
bd528d4e AP	133
6313caac AP	134	int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n);
6313caac AP	135
e5eaa0dc AP	136	void fsg_common_free_buffers(struct fsg_common *common);
e5eaa0dc AP	137
a891d7a3 AP	138	int fsg_common_set_cdev(struct fsg_common *common,
	139	struct usb_composite_dev *cdev, bool can_stall);
	140
5542f58c	141	void fsg_common_remove_lun(struct fsg_lun *lun);
70634170 AP	142
	143	void fsg_common_remove_luns(struct fsg_common *common);
	144
2412fbf1 AP	145	void fsg_common_set_ops(struct fsg_common *common,
	146	const struct fsg_operations *ops);
	147
b27c08c9 AP	148	int fsg_common_create_lun(struct fsg_common common, struct fsg_lun_config cfg,
	149	unsigned int id, const char *name,
	150	const char **name_pfx);
	151
	152	int fsg_common_create_luns(struct fsg_common common, struct fsg_config cfg);
	153
23682e3c AP	154	void fsg_common_set_inquiry_string(struct fsg_common common, const char vn,
	155	const char *pn);
	156
f3fed367 AP	157	void fsg_config_from_params(struct fsg_config *cfg,
	158	const struct fsg_module_parameters *params,
	159	unsigned int fsg_num_buffers);
	160
f3fed367	161	#endif /* USB_F_MASS_STORAGE_H */