NAME

tran_sync_pkt - SCSI HBA memory synchronization entry point

SYNOPSIS

#include <sys/scsi/scsi.h>
void prefixtran_sync_pkt(struct scsi_address *ap,


     struct scsi_pkt *pkt);

INTERFACE LEVEL

illumos architecture specific (illumos DDI).

PARAMETERS

ap

pkt

DESCRIPTION

The tran_sync_pkt() vector in the scsi_hba_tran(9S) structure must be initialized during the HBA driver's attach(9E) to point to an HBA driver entry point to be called when a target driver calls scsi_sync_pkt(9F).

tran_sync_pkt() must synchronize a HBA's or device's view of the data associated with the pkt, typically by calling ddi_dma_sync(9F). The operation may also involve HBA hardware-specific details, such as flushing I/O caches, or stalling until hardware buffers have been drained.

SEE ALSO

attach(9E), tran_init_pkt(9E), ddi_dma_sync(9F), scsi_hba_attach(9F), scsi_init_pkt(9F), scsi_sync_pkt(9F), scsi_address(9S), scsi_hba_tran(9S), scsi_pkt(9S)

Writing Device Drivers

NOTES

A target driver may call tran_sync_pkt() on packets for which no DMA resources were allocated.