1 #ifndef _SCSI_PRIV_H 2 #define _SCSI_PRIV_H 3 4 #include <linux/config.h> 5 #include <linux/device.h> 6 7 struct request_queue; 8 struct scsi_cmnd; 9 struct scsi_device; 10 struct scsi_host_template; 11 struct scsi_request; 12 struct Scsi_Host; 13 14 15 /* 16 * These are the values that the owner field can take. 17 * They are used as an indication of who the command belongs to. 18 */ 19 #define SCSI_OWNER_HIGHLEVEL 0x100 20 #define SCSI_OWNER_MIDLEVEL 0x101 21 #define SCSI_OWNER_LOWLEVEL 0x102 22 #define SCSI_OWNER_ERROR_HANDLER 0x103 23 #define SCSI_OWNER_BH_HANDLER 0x104 24 #define SCSI_OWNER_NOBODY 0x105 25 26 /* 27 * Magic values for certain scsi structs. Shouldn't ever be used. 28 */ 29 #define SCSI_CMND_MAGIC 0xE25C23A5 30 #define SCSI_REQ_MAGIC 0x75F6D354 31 32 /* 33 * Scsi Error Handler Flags 34 */ 35 #define scsi_eh_eflags_chk(scp, flags) \ 36 ((scp)->eh_eflags & (flags)) 37 #define scsi_eh_eflags_set(scp, flags) \ 38 do { (scp)->eh_eflags |= (flags); } while(0) 39 #define scsi_eh_eflags_clr(scp, flags) \ 40 do { (scp)->eh_eflags &= ~(flags); } while(0) 41 #define scsi_eh_eflags_clr_all(scp) \ 42 (scp->eh_eflags = 0) 43 44 #define SCSI_EH_CANCEL_CMD 0x0001 /* Cancel this cmd */ 45 #define SCSI_EH_REC_TIMEOUT 0x0002 /* EH retry timed out */ 46 47 #define SCSI_SENSE_VALID(scmd) \ 48 (((scmd)->sense_buffer[0] & 0x70) == 0x70) 49 50 /* 51 * Special value for scanning to specify scanning or rescanning of all 52 * possible channels, (target) ids, or luns on a given shost. 53 */ 54 #define SCAN_WILD_CARD ~0 55 56 /* hosts.c */ 57 extern int scsi_init_hosts(void); 58 extern void scsi_exit_hosts(void); 59 60 /* scsi.c */ 61 extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd); 62 extern int scsi_setup_command_freelist(struct Scsi_Host *shost); 63 extern void scsi_destroy_command_freelist(struct Scsi_Host *shost); 64 extern void scsi_done(struct scsi_cmnd *cmd); 65 extern int scsi_retry_command(struct scsi_cmnd *cmd); 66 extern int scsi_insert_special_req(struct scsi_request *sreq, int); 67 extern void scsi_init_cmd_from_req(struct scsi_cmnd *cmd, 68 struct scsi_request *sreq); 69 extern void __scsi_release_request(struct scsi_request *sreq); 70 extern void __scsi_done(struct scsi_cmnd *cmd); 71 #ifdef CONFIG_SCSI_LOGGING 72 void scsi_log_send(struct scsi_cmnd *cmd); 73 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition); 74 #else 75 static inline void scsi_log_send(struct scsi_cmnd *cmd) 76 { }; 77 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition) 78 { }; 79 #endif 80 81 /* scsi_devinfo.c */ 82 extern int scsi_get_device_flags(struct scsi_device *sdev, 83 unsigned char *vendor, unsigned char *model); 84 extern int __init scsi_init_devinfo(void); 85 extern void scsi_exit_devinfo(void); 86 87 /* scsi_error.c */ 88 extern void scsi_times_out(struct scsi_cmnd *cmd); 89 extern int scsi_error_handler(void *host); 90 extern int scsi_decide_disposition(struct scsi_cmnd *cmd); 91 extern void scsi_eh_wakeup(struct Scsi_Host *shost); 92 extern int scsi_eh_scmd_add(struct scsi_cmnd *, int); 93 94 /* scsi_lib.c */ 95 extern int scsi_maybe_unblock_host(struct scsi_device *sdev); 96 extern void scsi_setup_cmd_retry(struct scsi_cmnd *cmd); 97 extern void scsi_device_unbusy(struct scsi_device *sdev); 98 extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason); 99 extern void scsi_next_command(struct scsi_cmnd *cmd); 100 extern void scsi_run_host_queues(struct Scsi_Host *shost); 101 extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev); 102 extern void scsi_free_queue(struct request_queue *q); 103 extern int scsi_init_queue(void); 104 extern void scsi_exit_queue(void); 105 106 /* scsi_proc.c */ 107 #ifdef CONFIG_SCSI_PROC_FS 108 extern void scsi_proc_hostdir_add(struct scsi_host_template *); 109 extern void scsi_proc_hostdir_rm(struct scsi_host_template *); 110 extern void scsi_proc_host_add(struct Scsi_Host *); 111 extern void scsi_proc_host_rm(struct Scsi_Host *); 112 extern int scsi_init_procfs(void); 113 extern void scsi_exit_procfs(void); 114 #else 115 # define scsi_proc_hostdir_add(sht) do { } while (0) 116 # define scsi_proc_hostdir_rm(sht) do { } while (0) 117 # define scsi_proc_host_add(shost) do { } while (0) 118 # define scsi_proc_host_rm(shost) do { } while (0) 119 # define scsi_init_procfs() (0) 120 # define scsi_exit_procfs() do { } while (0) 121 #endif /* CONFIG_PROC_FS */ 122 123 /* scsi_scan.c */ 124 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int, 125 unsigned int, unsigned int, int); 126 extern void scsi_forget_host(struct Scsi_Host *); 127 extern void scsi_rescan_device(struct device *); 128 129 /* scsi_sysctl.c */ 130 #ifdef CONFIG_SYSCTL 131 extern int scsi_init_sysctl(void); 132 extern void scsi_exit_sysctl(void); 133 #else 134 # define scsi_init_sysctl() (0) 135 # define scsi_exit_sysctl() do { } while (0) 136 #endif /* CONFIG_SYSCTL */ 137 138 /* scsi_sysfs.c */ 139 extern void scsi_device_dev_release(struct device *); 140 extern int scsi_sysfs_add_sdev(struct scsi_device *); 141 extern int scsi_sysfs_add_host(struct Scsi_Host *); 142 extern int scsi_sysfs_register(void); 143 extern void scsi_sysfs_unregister(void); 144 extern void scsi_sysfs_device_initialize(struct scsi_device *); 145 extern int scsi_sysfs_target_initialize(struct scsi_device *); 146 extern struct scsi_transport_template blank_transport_template; 147 148 extern struct class sdev_class; 149 extern struct bus_type scsi_bus_type; 150 151 /* 152 * internal scsi timeout functions: for use by mid-layer and transport 153 * classes. 154 */ 155 156 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT (HZ*60) 157 extern int scsi_internal_device_block(struct scsi_device *sdev); 158 extern int scsi_internal_device_unblock(struct scsi_device *sdev); 159 160 #endif /* _SCSI_PRIV_H */ 161