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 }; 31 32 /* 33 * Scsi Error Handler Flags 34 */ 35 #define SCSI_EH_ABORT_SCHEDULED 0x0002 /* Abort has been scheduled */ 36 37 #define SCSI_SENSE_VALID(scmd) \ 38 (((scmd)->sense_buffer[0] & 0x70) == 0x70) 39 40 /* hosts.c */ 41 extern int scsi_init_hosts(void); 42 extern void scsi_exit_hosts(void); 43 44 /* scsi.c */ 45 int scsi_init_sense_cache(struct Scsi_Host *shost); 46 void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd); 47 #ifdef CONFIG_SCSI_LOGGING 48 void scsi_log_send(struct scsi_cmnd *cmd); 49 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition); 50 #else 51 static inline void scsi_log_send(struct scsi_cmnd *cmd) 52 { }; 53 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition) 54 { }; 55 #endif 56 57 /* scsi_devinfo.c */ 58 59 /* list of keys for the lists */ 60 enum scsi_devinfo_key { 61 SCSI_DEVINFO_GLOBAL = 0, 62 SCSI_DEVINFO_SPI, 63 }; 64 65 extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev, 66 const unsigned char *vendor, 67 const unsigned char *model); 68 extern blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev, 69 const unsigned char *vendor, 70 const unsigned char *model, 71 enum scsi_devinfo_key key); 72 extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor, 73 char *model, char *strflags, 74 blist_flags_t flags, 75 enum scsi_devinfo_key key); 76 extern int scsi_dev_info_list_del_keyed(char *vendor, char *model, 77 enum scsi_devinfo_key key); 78 extern int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name); 79 extern int scsi_dev_info_remove_list(enum scsi_devinfo_key key); 80 81 extern int __init scsi_init_devinfo(void); 82 extern void scsi_exit_devinfo(void); 83 84 /* scsi_error.c */ 85 extern void scmd_eh_abort_handler(struct work_struct *work); 86 extern enum blk_eh_timer_return scsi_timeout(struct request *req); 87 extern int scsi_error_handler(void *host); 88 extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd); 89 extern void scsi_eh_wakeup(struct Scsi_Host *shost); 90 extern void scsi_eh_scmd_add(struct scsi_cmnd *); 91 void scsi_eh_ready_devs(struct Scsi_Host *shost, 92 struct list_head *work_q, 93 struct list_head *done_q); 94 int scsi_eh_get_sense(struct list_head *work_q, 95 struct list_head *done_q); 96 bool scsi_noretry_cmd(struct scsi_cmnd *scmd); 97 void scsi_eh_done(struct scsi_cmnd *scmd); 98 99 /* scsi_lib.c */ 100 extern int scsi_maybe_unblock_host(struct scsi_device *sdev); 101 extern void scsi_device_unbusy(struct scsi_device *sdev, struct scsi_cmnd *cmd); 102 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason); 103 extern void scsi_io_completion(struct scsi_cmnd *, unsigned int); 104 extern void scsi_run_host_queues(struct Scsi_Host *shost); 105 extern void scsi_requeue_run_queue(struct work_struct *work); 106 extern void scsi_start_queue(struct scsi_device *sdev); 107 extern int scsi_mq_setup_tags(struct Scsi_Host *shost); 108 extern void scsi_mq_free_tags(struct kref *kref); 109 extern void scsi_exit_queue(void); 110 extern void scsi_evt_thread(struct work_struct *work); 111 112 /* scsi_proc.c */ 113 #ifdef CONFIG_SCSI_PROC_FS 114 extern void scsi_proc_hostdir_add(struct scsi_host_template *); 115 extern void scsi_proc_hostdir_rm(struct scsi_host_template *); 116 extern void scsi_proc_host_add(struct Scsi_Host *); 117 extern void scsi_proc_host_rm(struct Scsi_Host *); 118 extern int scsi_init_procfs(void); 119 extern void scsi_exit_procfs(void); 120 #else 121 # define scsi_proc_hostdir_add(sht) do { } while (0) 122 # define scsi_proc_hostdir_rm(sht) do { } while (0) 123 # define scsi_proc_host_add(shost) do { } while (0) 124 # define scsi_proc_host_rm(shost) do { } while (0) 125 # define scsi_init_procfs() (0) 126 # define scsi_exit_procfs() do { } while (0) 127 #endif /* CONFIG_PROC_FS */ 128 129 /* scsi_scan.c */ 130 void scsi_enable_async_suspend(struct device *dev); 131 extern int scsi_complete_async_scans(void); 132 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int, 133 unsigned int, u64, enum scsi_scan_mode); 134 extern void scsi_forget_host(struct Scsi_Host *); 135 extern void scsi_rescan_device(struct device *); 136 137 /* scsi_sysctl.c */ 138 #ifdef CONFIG_SYSCTL 139 extern int scsi_init_sysctl(void); 140 extern void scsi_exit_sysctl(void); 141 #else 142 # define scsi_init_sysctl() (0) 143 # define scsi_exit_sysctl() do { } while (0) 144 #endif /* CONFIG_SYSCTL */ 145 146 /* scsi_sysfs.c */ 147 extern int scsi_sysfs_add_sdev(struct scsi_device *); 148 extern int scsi_sysfs_add_host(struct Scsi_Host *); 149 extern int scsi_sysfs_register(void); 150 extern void scsi_sysfs_unregister(void); 151 extern void scsi_sysfs_device_initialize(struct scsi_device *); 152 extern int scsi_sysfs_target_initialize(struct scsi_device *); 153 extern struct scsi_transport_template blank_transport_template; 154 extern void __scsi_remove_device(struct scsi_device *); 155 156 extern struct bus_type scsi_bus_type; 157 extern const struct attribute_group *scsi_shost_groups[]; 158 159 /* scsi_netlink.c */ 160 #ifdef CONFIG_SCSI_NETLINK 161 extern void scsi_netlink_init(void); 162 extern void scsi_netlink_exit(void); 163 extern struct sock *scsi_nl_sock; 164 #else 165 static inline void scsi_netlink_init(void) {} 166 static inline void scsi_netlink_exit(void) {} 167 #endif 168 169 /* scsi_pm.c */ 170 #ifdef CONFIG_PM 171 extern const struct dev_pm_ops scsi_bus_pm_ops; 172 173 extern void scsi_autopm_get_target(struct scsi_target *); 174 extern void scsi_autopm_put_target(struct scsi_target *); 175 extern int scsi_autopm_get_host(struct Scsi_Host *); 176 extern void scsi_autopm_put_host(struct Scsi_Host *); 177 #else 178 static inline void scsi_autopm_get_target(struct scsi_target *t) {} 179 static inline void scsi_autopm_put_target(struct scsi_target *t) {} 180 static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; } 181 static inline void scsi_autopm_put_host(struct Scsi_Host *h) {} 182 #endif /* CONFIG_PM */ 183 184 /* scsi_dh.c */ 185 #ifdef CONFIG_SCSI_DH 186 void scsi_dh_add_device(struct scsi_device *sdev); 187 void scsi_dh_release_device(struct scsi_device *sdev); 188 #else 189 static inline void scsi_dh_add_device(struct scsi_device *sdev) { } 190 static inline void scsi_dh_release_device(struct scsi_device *sdev) { } 191 #endif 192 193 struct bsg_device *scsi_bsg_register_queue(struct scsi_device *sdev); 194 195 extern int scsi_device_max_queue_depth(struct scsi_device *sdev); 196 197 /* 198 * internal scsi timeout functions: for use by mid-layer and transport 199 * classes. 200 */ 201 202 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT 600 /* units in seconds */ 203 204 #endif /* _SCSI_PRIV_H */ 205