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144 lines
4.1 KiB
144 lines
4.1 KiB
/* 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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