Entry Points for SCSA HBA Drivers
An HBA driver can work with target drivers through the SCSA interface.
The SCSA interfaces require the HBA driver to supply a number of entry points
that are callable through the scsi_hba_tran(9S) structure.
These entry points fall into five functional groups:
The following table lists the entry points
for SCSA HBA by function groups.
Table 18-3 SCSA Entry Points
| | |
|---|
Target Driver Instance Initialization
|
| Performs per-target initialization (optional)
|
|
|
| Probes SCSI bus for existence of a target (optional)
|
|
|
| Performs per-target deallocation (optional)
|
Resource Allocation
|
| Allocates SCSI packet and DMA resources
|
|
|
| Frees SCSI packet and DMA resources
|
|
|
| Synchronizes memory before and after DMA
|
|
|
| Frees DMA resources
|
Command Transport
|
| Transports a SCSI command
|
Capability Management
|
| Inquires about a capability's value
|
|
|
| Sets a capability's value
|
Abort and Reset
|
| Aborts outstanding SCSI commands
|
|
|
| Resets a target device or the SCSI bus
|
|
|
| Resets the SCSI bus
|
|
|
| Request to notify target of bus reset (optional)
|
Dynamic Reconfiguration
|
| Stops activity on the bus
|
|
|
| Resumes activity on the bus
|
|