1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _SCSI_PRIV_H 3 #define _SCSI_PRIV_H 4 5 #include <linux/device.h> 6 #include <scsi/scsi_device.h> 7 #include <linux/sbitmap.h> 8 9 struct bsg_device; 10 struct request_queue; 11 struct request; 12 struct scsi_cmnd; 13 struct scsi_device; 14 struct scsi_target; 15 struct scsi_host_template; 16 struct Scsi_Host; 17 struct scsi_nl_hdr; 18 19 #define SCSI_CMD_RETRIES_NO_LIMIT -1 20 21 /* 22 * Error codes used by scsi-ml internally. These must not be used by drivers. 23 */ 24 enum scsi_ml_status { 25 SCSIML_STAT_OK = 0x00, 26 SCSIML_STAT_RESV_CONFLICT = 0x01, /* Reservation conflict */ 27 SCSIML_STAT_NOSPC = 0x02, /* Space allocation on the dev failed */ 28 SCSIML_STAT_MED_ERROR = 0x03, /* Medium error */ 29 SCSIML_STAT_TGT_FAILURE = 0x04, /* Permanent target failure */ 30 SCSIML_STAT_DL_TIMEOUT = 0x05, /* Command Duration Limit timeout */ 31 }; 32 scsi_ml_byte(int result)33 static inline u8 scsi_ml_byte(int result) 34 { 35 return (result >> 8) & 0xff; 36 } 37 38 /* 39 * Scsi Error Handler Flags 40 */ 41 #define SCSI_EH_ABORT_SCHEDULED 0x0002 /* Abort has been scheduled */ 42 43 #define SCSI_SENSE_VALID(scmd) \ 44 (((scmd)->sense_buffer[0] & 0x70) == 0x70) 45 46 /* hosts.c */ 47 extern int scsi_init_hosts(void); 48 extern void scsi_exit_hosts(void); 49 50 /* scsi.c */ 51 int scsi_init_sense_cache(struct Scsi_Host *shost); 52 void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd); 53 #ifdef CONFIG_SCSI_LOGGING 54 void scsi_log_send(struct scsi_cmnd *cmd); 55 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition); 56 #else scsi_log_send(struct scsi_cmnd * cmd)57 static inline void scsi_log_send(struct scsi_cmnd *cmd) 58 { }; scsi_log_completion(struct scsi_cmnd * cmd,int disposition)59 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition) 60 { }; 61 #endif 62 63 /* scsi_devinfo.c */ 64 65 /* list of keys for the lists */ 66 enum scsi_devinfo_key { 67 SCSI_DEVINFO_GLOBAL = 0, 68 SCSI_DEVINFO_SPI, 69 }; 70 71 extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev, 72 const unsigned char *vendor, 73 const unsigned char *model); 74 extern blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev, 75 const unsigned char *vendor, 76 const unsigned char *model, 77 enum scsi_devinfo_key key); 78 extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor, 79 char *model, char *strflags, 80 blist_flags_t flags, 81 enum scsi_devinfo_key key); 82 extern int scsi_dev_info_list_del_keyed(char *vendor, char *model, 83 enum scsi_devinfo_key key); 84 extern int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name); 85 extern int scsi_dev_info_remove_list(enum scsi_devinfo_key key); 86 87 extern int __init scsi_init_devinfo(void); 88 extern void scsi_exit_devinfo(void); 89 90 /* scsi_error.c */ 91 extern void scmd_eh_abort_handler(struct work_struct *work); 92 extern enum blk_eh_timer_return scsi_timeout(struct request *req); 93 extern int scsi_error_handler(void *host); 94 extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd); 95 extern void scsi_eh_wakeup(struct Scsi_Host *shost, unsigned int busy); 96 extern void scsi_eh_scmd_add(struct scsi_cmnd *); 97 void scsi_eh_ready_devs(struct Scsi_Host *shost, 98 struct list_head *work_q, 99 struct list_head *done_q); 100 int scsi_eh_get_sense(struct list_head *work_q, 101 struct list_head *done_q); 102 bool scsi_noretry_cmd(struct scsi_cmnd *scmd); 103 void scsi_eh_done(struct scsi_cmnd *scmd); 104 105 /* scsi_lib.c */ 106 extern void scsi_device_unbusy(struct scsi_device *sdev, struct scsi_cmnd *cmd); 107 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason); 108 extern void scsi_io_completion(struct scsi_cmnd *, unsigned int); 109 extern void scsi_run_host_queues(struct Scsi_Host *shost); 110 extern void scsi_requeue_run_queue(struct work_struct *work); 111 extern void scsi_start_queue(struct scsi_device *sdev); 112 extern int scsi_mq_setup_tags(struct Scsi_Host *shost); 113 extern void scsi_mq_free_tags(struct kref *kref); 114 extern void scsi_exit_queue(void); 115 extern void scsi_evt_thread(struct work_struct *work); 116 117 /* scsi_proc.c */ 118 #ifdef CONFIG_SCSI_PROC_FS 119 extern int scsi_proc_hostdir_add(const struct scsi_host_template *); 120 extern void scsi_proc_hostdir_rm(const struct scsi_host_template *); 121 extern void scsi_proc_host_add(struct Scsi_Host *); 122 extern void scsi_proc_host_rm(struct Scsi_Host *); 123 extern int scsi_init_procfs(void); 124 extern void scsi_exit_procfs(void); 125 #else 126 # define scsi_proc_hostdir_add(sht) 0 127 # define scsi_proc_hostdir_rm(sht) do { } while (0) 128 # define scsi_proc_host_add(shost) do { } while (0) 129 # define scsi_proc_host_rm(shost) do { } while (0) 130 # define scsi_init_procfs() (0) 131 # define scsi_exit_procfs() do { } while (0) 132 #endif /* CONFIG_PROC_FS */ 133 134 /* scsi_scan.c */ 135 void scsi_enable_async_suspend(struct device *dev); 136 extern int scsi_complete_async_scans(void); 137 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int, 138 unsigned int, u64, enum scsi_scan_mode); 139 extern void scsi_forget_host(struct Scsi_Host *); 140 141 /* scsi_sysctl.c */ 142 #ifdef CONFIG_SYSCTL 143 extern int scsi_init_sysctl(void); 144 extern void scsi_exit_sysctl(void); 145 #else 146 # define scsi_init_sysctl() (0) 147 # define scsi_exit_sysctl() do { } while (0) 148 #endif /* CONFIG_SYSCTL */ 149 150 /* scsi_sysfs.c */ 151 extern int scsi_sysfs_add_sdev(struct scsi_device *); 152 extern int scsi_sysfs_add_host(struct Scsi_Host *); 153 extern int scsi_sysfs_register(void); 154 extern void scsi_sysfs_unregister(void); 155 extern void scsi_sysfs_device_initialize(struct scsi_device *); 156 extern struct scsi_transport_template blank_transport_template; 157 extern void __scsi_remove_device(struct scsi_device *); 158 159 extern const struct bus_type scsi_bus_type; 160 extern const struct attribute_group *scsi_shost_groups[]; 161 162 /* scsi_netlink.c */ 163 #ifdef CONFIG_SCSI_NETLINK 164 extern void scsi_netlink_init(void); 165 extern void scsi_netlink_exit(void); 166 extern struct sock *scsi_nl_sock; 167 #else scsi_netlink_init(void)168 static inline void scsi_netlink_init(void) {} scsi_netlink_exit(void)169 static inline void scsi_netlink_exit(void) {} 170 #endif 171 172 /* scsi_pm.c */ 173 #ifdef CONFIG_PM 174 extern const struct dev_pm_ops scsi_bus_pm_ops; 175 176 extern void scsi_autopm_get_target(struct scsi_target *); 177 extern void scsi_autopm_put_target(struct scsi_target *); 178 extern int scsi_autopm_get_host(struct Scsi_Host *); 179 extern void scsi_autopm_put_host(struct Scsi_Host *); 180 #else scsi_autopm_get_target(struct scsi_target * t)181 static inline void scsi_autopm_get_target(struct scsi_target *t) {} scsi_autopm_put_target(struct scsi_target * t)182 static inline void scsi_autopm_put_target(struct scsi_target *t) {} scsi_autopm_get_host(struct Scsi_Host * h)183 static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; } scsi_autopm_put_host(struct Scsi_Host * h)184 static inline void scsi_autopm_put_host(struct Scsi_Host *h) {} 185 #endif /* CONFIG_PM */ 186 187 /* scsi_dh.c */ 188 #ifdef CONFIG_SCSI_DH 189 void scsi_dh_add_device(struct scsi_device *sdev); 190 void scsi_dh_release_device(struct scsi_device *sdev); 191 #else scsi_dh_add_device(struct scsi_device * sdev)192 static inline void scsi_dh_add_device(struct scsi_device *sdev) { } scsi_dh_release_device(struct scsi_device * sdev)193 static inline void scsi_dh_release_device(struct scsi_device *sdev) { } 194 #endif 195 196 struct bsg_device *scsi_bsg_register_queue(struct scsi_device *sdev); 197 198 extern int scsi_device_max_queue_depth(struct scsi_device *sdev); 199 200 /* 201 * internal scsi timeout functions: for use by mid-layer and transport 202 * classes. 203 */ 204 205 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT 600 /* units in seconds */ 206 207 #endif /* _SCSI_PRIV_H */ 208