scsi_poll man page on SunOS

scsi_poll man page on SunOS

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

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

SYNOPSIS
       #include <sys/scsi/scsi.h>

       int scsi_poll(struct scsi_pkt *pkt);

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI).

PARAMETERS
       pkt	Pointer to the scsi_pkt(9S) structure.

DESCRIPTION
       The  scsi_poll()	 function  requests  the  host adapter driver to run a
       polled command. Unlike scsi_transport(9F)  which	 runs  commands	 asyn‐
       chronously,  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.

RETURN VALUES
       The scsi_poll() function returns:

       0	command completed successfully.

       -1	command failed.

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

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

       Writing Device Drivers

WARNINGS
       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.

SunOS 5.10			  16 Jan 2006			 scsi_poll(9F)

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