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>
16 struct scsi_host_template;
20 #define SCSI_CMD_RETRIES_NO_LIMIT -1
23 * Scsi Error Handler Flags
25 #define SCSI_EH_ABORT_SCHEDULED 0x0002 /* Abort has been scheduled */
27 #define SCSI_SENSE_VALID(scmd) \
28 (((scmd)->sense_buffer[0] & 0x70) == 0x70)
31 extern int scsi_init_hosts(void);
32 extern void scsi_exit_hosts(void);
35 int scsi_init_sense_cache(struct Scsi_Host *shost);
36 void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd);
37 #ifdef CONFIG_SCSI_LOGGING
38 void scsi_log_send(struct scsi_cmnd *cmd);
39 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
41 static inline void scsi_log_send(struct scsi_cmnd *cmd)
43 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
49 /* list of keys for the lists */
50 enum scsi_devinfo_key {
51 SCSI_DEVINFO_GLOBAL = 0,
55 extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
56 const unsigned char *vendor,
57 const unsigned char *model);
58 extern blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
59 const unsigned char *vendor,
60 const unsigned char *model,
61 enum scsi_devinfo_key key);
62 extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,
63 char *model, char *strflags,
65 enum scsi_devinfo_key key);
66 extern int scsi_dev_info_list_del_keyed(char *vendor, char *model,
67 enum scsi_devinfo_key key);
68 extern int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name);
69 extern int scsi_dev_info_remove_list(enum scsi_devinfo_key key);
71 extern int __init scsi_init_devinfo(void);
72 extern void scsi_exit_devinfo(void);
75 extern void scmd_eh_abort_handler(struct work_struct *work);
76 extern enum blk_eh_timer_return scsi_times_out(struct request *req);
77 extern int scsi_error_handler(void *host);
78 extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd);
79 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
80 extern void scsi_eh_scmd_add(struct scsi_cmnd *);
81 void scsi_eh_ready_devs(struct Scsi_Host *shost,
82 struct list_head *work_q,
83 struct list_head *done_q);
84 int scsi_eh_get_sense(struct list_head *work_q,
85 struct list_head *done_q);
86 int scsi_noretry_cmd(struct scsi_cmnd *scmd);
89 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
90 extern void scsi_device_unbusy(struct scsi_device *sdev, struct scsi_cmnd *cmd);
91 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
92 extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
93 extern void scsi_run_host_queues(struct Scsi_Host *shost);
94 extern void scsi_requeue_run_queue(struct work_struct *work);
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 struct bsg_device *scsi_bsg_register_queue(struct scsi_device *sdev);
186 extern int scsi_device_max_queue_depth(struct scsi_device *sdev);
189 * internal scsi timeout functions: for use by mid-layer and transport
193 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT 600 /* units in seconds */
195 #endif /* _SCSI_PRIV_H */