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Solaris DDI specific (Solaris DDI).
The scsi_device structure stores common information about each SCSI logical unit, including pointers to areas that contain both generic and device specific information. There is one scsi_device structure for each logical unit attached to the system. The host adapter driver initializes part of this structure prior to probe(9E) and destroys this structure after a probe failure or successful detach(9E) .
| struct scsi_address | sd_address; | /* Routing information */ |
| dev_info_t | *sd_dev; | /* Cross-reference to our dev_info_t */ |
| kmutex_t | sd_mutex; | /* Mutex for this device */ |
| struct scsi_inquiry | *sd_inq; | /* scsi_inquiry data structure */ |
| struct scsi_extended_sense | *sd_sense; | /* Optional request sense buffer ptr */ |
| caddr_t | sd_private; | /* Target drivers private data */ |
sd_address contains the routing information that the target driver normally copies into a scsi_pkt(9S) structure using the collection of makecom(9F) functions. The SCSA library routines use this information to determine which host adapter, SCSI bus, and target/lun a command is intended for. This structure is initialized by the host adapter driver.
sd_dev is a pointer to the corresponding dev_info structure. This pointer is initialized by the host adapter driver.
sd_mutex is a mutual exclusion lock for this device. It is used to serialize access to a device. The host adapter driver initializes this mutex. See mutex(9F) .
sd_inq is initially NULL (zero). After executing scsi_probe(9F) this field contains the inquiry data associated with the particular device.
sd_sense is initially NULL (zero). If the target driver wants to use this field for storing REQUEST SENSE data, it should allocate an scsi_extended_sense(9S) buffer and set this field to the address of this buffer.
sd_private is reserved for the use of target drivers and should generally be used to point to target specific data structures.