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1fcba97e35
The kref used to be needed because sharing of fsg_common among multiple USB function instances was handled by fsg. Now this is managed by configfs, we don't need it anymore. So let's eliminate kref from this driver. Acked-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Michal Nazarewicz <mina86@mina86.com> Signed-off-by: Jaejoong Kim <climbbb.kim@gmail.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef USB_F_MASS_STORAGE_H
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#define USB_F_MASS_STORAGE_H
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#include <linux/usb/composite.h>
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#include "storage_common.h"
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struct fsg_module_parameters {
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char *file[FSG_MAX_LUNS];
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bool ro[FSG_MAX_LUNS];
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bool removable[FSG_MAX_LUNS];
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bool cdrom[FSG_MAX_LUNS];
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bool nofua[FSG_MAX_LUNS];
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unsigned int file_count, ro_count, removable_count, cdrom_count;
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unsigned int nofua_count;
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unsigned int luns; /* nluns */
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bool stall; /* can_stall */
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};
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#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc) \
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module_param_array_named(prefix ## name, params.name, type, \
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&prefix ## params.name ## _count, \
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S_IRUGO); \
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MODULE_PARM_DESC(prefix ## name, desc)
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#define _FSG_MODULE_PARAM(prefix, params, name, type, desc) \
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module_param_named(prefix ## name, params.name, type, \
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S_IRUGO); \
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MODULE_PARM_DESC(prefix ## name, desc)
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#define __FSG_MODULE_PARAMETERS(prefix, params) \
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_FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp, \
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"names of backing files or devices"); \
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_FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool, \
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"true to force read-only"); \
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_FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool, \
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"true to simulate removable media"); \
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_FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool, \
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"true to simulate CD-ROM instead of disk"); \
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_FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool, \
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"true to ignore SCSI WRITE(10,12) FUA bit"); \
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_FSG_MODULE_PARAM(prefix, params, luns, uint, \
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"number of LUNs"); \
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_FSG_MODULE_PARAM(prefix, params, stall, bool, \
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"false to prevent bulk stalls")
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#ifdef CONFIG_USB_GADGET_DEBUG_FILES
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#define FSG_MODULE_PARAMETERS(prefix, params) \
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__FSG_MODULE_PARAMETERS(prefix, params); \
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module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
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MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
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#else
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#define FSG_MODULE_PARAMETERS(prefix, params) \
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__FSG_MODULE_PARAMETERS(prefix, params)
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#endif
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struct fsg_common;
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/* FSF callback functions */
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struct fsg_lun_opts {
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struct config_group group;
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struct fsg_lun *lun;
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int lun_id;
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};
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struct fsg_opts {
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struct fsg_common *common;
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struct usb_function_instance func_inst;
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struct fsg_lun_opts lun0;
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struct config_group *default_groups[2];
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bool no_configfs; /* for legacy gadgets */
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/*
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* Read/write access to configfs attributes is handled by configfs.
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*
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* This is to protect the data from concurrent access by read/write
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* and create symlink/remove symlink.
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*/
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struct mutex lock;
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int refcnt;
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};
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struct fsg_lun_config {
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const char *filename;
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char ro;
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char removable;
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char cdrom;
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char nofua;
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char inquiry_string[INQUIRY_STRING_LEN];
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};
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struct fsg_config {
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unsigned nluns;
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struct fsg_lun_config luns[FSG_MAX_LUNS];
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/* Callback functions. */
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const struct fsg_operations *ops;
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/* Gadget's private data. */
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void *private_data;
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const char *vendor_name; /* 8 characters or less */
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const char *product_name; /* 16 characters or less */
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char can_stall;
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unsigned int fsg_num_buffers;
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};
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static inline struct fsg_opts *
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fsg_opts_from_func_inst(const struct usb_function_instance *fi)
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{
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return container_of(fi, struct fsg_opts, func_inst);
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}
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void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs);
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int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n);
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void fsg_common_free_buffers(struct fsg_common *common);
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int fsg_common_set_cdev(struct fsg_common *common,
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struct usb_composite_dev *cdev, bool can_stall);
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void fsg_common_remove_lun(struct fsg_lun *lun);
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void fsg_common_remove_luns(struct fsg_common *common);
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int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
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unsigned int id, const char *name,
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const char **name_pfx);
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int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg);
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void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn,
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const char *pn);
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void fsg_config_from_params(struct fsg_config *cfg,
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const struct fsg_module_parameters *params,
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unsigned int fsg_num_buffers);
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#endif /* USB_F_MASS_STORAGE_H */
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