1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/device.h>
6 #include <linux/async.h>
7 #include <scsi/scsi_device.h>
8 #include <linux/sbitmap.h>
15 struct scsi_host_template;
19 #define SCSI_CMD_RETRIES_NO_LIMIT -1
22 * Scsi Error Handler Flags
24 #define SCSI_EH_ABORT_SCHEDULED 0x0002 /* Abort has been scheduled */
26 #define SCSI_SENSE_VALID(scmd) \
27 (((scmd)->sense_buffer[0] & 0x70) == 0x70)
30 extern int scsi_init_hosts(void);
31 extern void scsi_exit_hosts(void);
34 int scsi_init_sense_cache(struct Scsi_Host *shost);
35 void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd);
36 #ifdef CONFIG_SCSI_LOGGING
37 void scsi_log_send(struct scsi_cmnd *cmd);
38 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
40 static inline void scsi_log_send(struct scsi_cmnd *cmd)
42 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
48 /* list of keys for the lists */
49 enum scsi_devinfo_key {
50 SCSI_DEVINFO_GLOBAL = 0,
54 extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
55 const unsigned char *vendor,
56 const unsigned char *model);
57 extern blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
58 const unsigned char *vendor,
59 const unsigned char *model,
60 enum scsi_devinfo_key key);
61 extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,
62 char *model, char *strflags,
64 enum scsi_devinfo_key key);
65 extern int scsi_dev_info_list_del_keyed(char *vendor, char *model,
66 enum scsi_devinfo_key key);
67 extern int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name);
68 extern int scsi_dev_info_remove_list(enum scsi_devinfo_key key);
70 extern int __init scsi_init_devinfo(void);
71 extern void scsi_exit_devinfo(void);
74 extern void scmd_eh_abort_handler(struct work_struct *work);
75 extern enum blk_eh_timer_return scsi_times_out(struct request *req);
76 extern int scsi_error_handler(void *host);
77 extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd);
78 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
79 extern void scsi_eh_scmd_add(struct scsi_cmnd *);
80 void scsi_eh_ready_devs(struct Scsi_Host *shost,
81 struct list_head *work_q,
82 struct list_head *done_q);
83 int scsi_eh_get_sense(struct list_head *work_q,
84 struct list_head *done_q);
85 int scsi_noretry_cmd(struct scsi_cmnd *scmd);
88 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
89 extern void scsi_device_unbusy(struct scsi_device *sdev, struct scsi_cmnd *cmd);
90 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
91 extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
92 extern void scsi_run_host_queues(struct Scsi_Host *shost);
93 extern void scsi_requeue_run_queue(struct work_struct *work);
94 extern struct request_queue *scsi_mq_alloc_queue(struct scsi_device *sdev);
95 extern void scsi_start_queue(struct scsi_device *sdev);
96 extern int scsi_mq_setup_tags(struct Scsi_Host *shost);
97 extern void scsi_mq_destroy_tags(struct Scsi_Host *shost);
98 extern void scsi_exit_queue(void);
99 extern void scsi_evt_thread(struct work_struct *work);
102 #ifdef CONFIG_SCSI_PROC_FS
103 extern void scsi_proc_hostdir_add(struct scsi_host_template *);
104 extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
105 extern void scsi_proc_host_add(struct Scsi_Host *);
106 extern void scsi_proc_host_rm(struct Scsi_Host *);
107 extern int scsi_init_procfs(void);
108 extern void scsi_exit_procfs(void);
110 # define scsi_proc_hostdir_add(sht) do { } while (0)
111 # define scsi_proc_hostdir_rm(sht) do { } while (0)
112 # define scsi_proc_host_add(shost) do { } while (0)
113 # define scsi_proc_host_rm(shost) do { } while (0)
114 # define scsi_init_procfs() (0)
115 # define scsi_exit_procfs() do { } while (0)
116 #endif /* CONFIG_PROC_FS */
119 extern char scsi_scan_type[];
120 extern int scsi_complete_async_scans(void);
121 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
122 unsigned int, u64, enum scsi_scan_mode);
123 extern void scsi_forget_host(struct Scsi_Host *);
124 extern void scsi_rescan_device(struct device *);
128 extern int scsi_init_sysctl(void);
129 extern void scsi_exit_sysctl(void);
131 # define scsi_init_sysctl() (0)
132 # define scsi_exit_sysctl() do { } while (0)
133 #endif /* CONFIG_SYSCTL */
136 extern int scsi_sysfs_add_sdev(struct scsi_device *);
137 extern int scsi_sysfs_add_host(struct Scsi_Host *);
138 extern int scsi_sysfs_register(void);
139 extern void scsi_sysfs_unregister(void);
140 extern void scsi_sysfs_device_initialize(struct scsi_device *);
141 extern int scsi_sysfs_target_initialize(struct scsi_device *);
142 extern struct scsi_transport_template blank_transport_template;
143 extern void __scsi_remove_device(struct scsi_device *);
145 extern struct bus_type scsi_bus_type;
146 extern const struct attribute_group *scsi_sysfs_shost_attr_groups[];
149 #ifdef CONFIG_SCSI_NETLINK
150 extern void scsi_netlink_init(void);
151 extern void scsi_netlink_exit(void);
152 extern struct sock *scsi_nl_sock;
154 static inline void scsi_netlink_init(void) {}
155 static inline void scsi_netlink_exit(void) {}
160 extern const struct dev_pm_ops scsi_bus_pm_ops;
162 extern void scsi_autopm_get_target(struct scsi_target *);
163 extern void scsi_autopm_put_target(struct scsi_target *);
164 extern int scsi_autopm_get_host(struct Scsi_Host *);
165 extern void scsi_autopm_put_host(struct Scsi_Host *);
167 static inline void scsi_autopm_get_target(struct scsi_target *t) {}
168 static inline void scsi_autopm_put_target(struct scsi_target *t) {}
169 static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; }
170 static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}
171 #endif /* CONFIG_PM */
173 extern struct async_domain scsi_sd_pm_domain;
176 #ifdef CONFIG_SCSI_DH
177 void scsi_dh_add_device(struct scsi_device *sdev);
178 void scsi_dh_release_device(struct scsi_device *sdev);
180 static inline void scsi_dh_add_device(struct scsi_device *sdev) { }
181 static inline void scsi_dh_release_device(struct scsi_device *sdev) { }
184 extern int scsi_device_max_queue_depth(struct scsi_device *sdev);
187 * internal scsi timeout functions: for use by mid-layer and transport
191 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT 600 /* units in seconds */
193 #endif /* _SCSI_PRIV_H */