1 #ifndef USB_F_MASS_STORAGE_H 2 #define USB_F_MASS_STORAGE_H 3 4 #include <linux/usb/composite.h> 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_lun_opts { 64 struct config_group group; 65 struct fsg_lun *lun; 66 int lun_id; 67 }; 68 69 struct fsg_opts { 70 struct fsg_common *common; 71 struct usb_function_instance func_inst; 72 struct fsg_lun_opts lun0; 73 struct config_group *default_groups[2]; 74 bool no_configfs; /* for legacy gadgets */ 75 76 /* 77 * Read/write access to configfs attributes is handled by configfs. 78 * 79 * This is to protect the data from concurrent access by read/write 80 * and create symlink/remove symlink. 81 */ 82 struct mutex lock; 83 int refcnt; 84 }; 85 86 struct fsg_lun_config { 87 const char *filename; 88 char ro; 89 char removable; 90 char cdrom; 91 char nofua; 92 char inquiry_string[INQUIRY_STRING_LEN]; 93 }; 94 95 struct fsg_config { 96 unsigned nluns; 97 struct fsg_lun_config luns[FSG_MAX_LUNS]; 98 99 /* Callback functions. */ 100 const struct fsg_operations *ops; 101 /* Gadget's private data. */ 102 void *private_data; 103 104 const char *vendor_name; /* 8 characters or less */ 105 const char *product_name; /* 16 characters or less */ 106 107 char can_stall; 108 unsigned int fsg_num_buffers; 109 }; 110 111 static inline struct fsg_opts * 112 fsg_opts_from_func_inst(const struct usb_function_instance *fi) 113 { 114 return container_of(fi, struct fsg_opts, func_inst); 115 } 116 117 void fsg_common_get(struct fsg_common *common); 118 119 void fsg_common_put(struct fsg_common *common); 120 121 void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs); 122 123 int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n); 124 125 void fsg_common_free_buffers(struct fsg_common *common); 126 127 int fsg_common_set_cdev(struct fsg_common *common, 128 struct usb_composite_dev *cdev, bool can_stall); 129 130 void fsg_common_remove_lun(struct fsg_lun *lun); 131 132 void fsg_common_remove_luns(struct fsg_common *common); 133 134 int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg, 135 unsigned int id, const char *name, 136 const char **name_pfx); 137 138 int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg); 139 140 void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn, 141 const char *pn); 142 143 void fsg_config_from_params(struct fsg_config *cfg, 144 const struct fsg_module_parameters *params, 145 unsigned int fsg_num_buffers); 146 147 #endif /* USB_F_MASS_STORAGE_H */ 148