SCSI_POLL(9F) Kernel Functions for Drivers SCSI_POLL(9F)

scsi_poll - run a polled SCSI command on behalf of a target driver

#include <sys/scsi/scsi.h>
int scsi_poll(struct scsi_pkt *pkt);

illumos DDI specific (illumos DDI).

Pointer to the scsi_pkt(9S) structure.

The scsi_poll() function requests the host adapter driver to run a polled command. Unlike scsi_transport(9F) which runs commands asynchronously, scsi_poll() runs commands to completion before returning. If the pkt_time member of pkt is 0, the value of pkt_time is defaulted to SCSI_POLL_TIMEOUT to prevent an indefinite hang of the system.

The scsi_poll() function returns:


command completed successfully.


command failed.

The scsi_poll() function can be called from user, interrupt, or kernel context. This function should not be called when the caller is executing timeout(9F) in the context of a thread.

makecom(9F), scsi_transport(9F), scsi_pkt(9S)

Writing Device Drivers

Since scsi_poll() runs commands to completion before returning, it may require more time than is desirable when called from interrupt context. Therefore, calling scsi_poll from interrupt context is not recommended.
January 16, 2006 OmniOS