diff options
Diffstat (limited to 'drivers/scsi/hosts.h')
| -rw-r--r-- | drivers/scsi/hosts.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/scsi/hosts.h b/drivers/scsi/hosts.h index 191e4469e..f1b82a5a1 100644 --- a/drivers/scsi/hosts.h +++ b/drivers/scsi/hosts.h @@ -362,6 +362,17 @@ struct Scsi_Host * initialized, as required. */ + /* + * The maximum length of SCSI commands that this host can accept. + * Probably 12 for most host adapters, but could be 16 for others. + * For drivers that don't set this field, a value of 12 is + * assumed. I am leaving this as a number rather than a bit + * because you never know what subsequent SCSI standards might do + * (i.e. could there be a 20 byte or a 24-byte command a few years + * down the road?). + */ + unsigned char max_cmd_len; + int this_id; int can_queue; short cmd_per_lun; @@ -379,6 +390,12 @@ struct Scsi_Host * Host has rejected a command because it was busy. */ unsigned host_blocked:1; + + /* + * Host has requested that no further requests come through for the + * time being. + */ + unsigned host_self_blocked:1; /* * Host uses correct SCSI ordering not PC ordering. The bit is @@ -413,6 +430,20 @@ struct Scsi_Host extern void scsi_free_host_dev(Scsi_Device * SDpnt); extern Scsi_Device * scsi_get_host_dev(struct Scsi_Host * SHpnt); +extern void scsi_unblock_requests(struct Scsi_Host * SHpnt); +extern void scsi_block_requests(struct Scsi_Host * SHpnt); +extern void scsi_report_bus_reset(struct Scsi_Host * SHpnt, int channel); + +typedef struct SHN + { + struct SHN * next; + char * name; + unsigned short host_no; + unsigned short host_registered; + unsigned loaded_as_module; + } Scsi_Host_Name; + +extern Scsi_Host_Name * scsi_host_no_list; extern struct Scsi_Host * scsi_hostlist; extern struct Scsi_Device_Template * scsi_devicelist; @@ -504,6 +535,15 @@ extern void scsi_unregister_module(int, void *); * tackle the character devices first, as there aren't any locking implications * in the block device layer. The block devices will require more work. */ +#ifndef CONFIG_SD_EXTRA_DEVS +#define CONFIG_SD_EXTRA_DEVS 2 +#endif +#ifndef CONFIG_ST_EXTRA_DEVS +#define CONFIG_ST_EXTRA_DEVS 2 +#endif +#ifndef CONFIG_SR_EXTRA_DEVS +#define CONFIG_SR_EXTRA_DEVS 2 +#endif #define SD_EXTRA_DEVS CONFIG_SD_EXTRA_DEVS #define ST_EXTRA_DEVS CONFIG_ST_EXTRA_DEVS #define SR_EXTRA_DEVS CONFIG_SR_EXTRA_DEVS |