man/man9e/tran_sync_pkt.9e

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 Copyright (c) 1993, Sun Microsystems, Inc.
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 TRAN_SYNC_PKT 9E "Nov 1, 1993"
 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

Solaris architecture specific (Solaris DDI).
 PARAMETERS
ap

A pointer to a scsi_address(9S) structure.


pkt

A pointer to a scsi_pkt(9S) structure.


 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.