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Name

makecom, makecom_g0, makecom_g0_s, makecom_g1, makecom_g5 - make a packet for SCSI commands

Synopsis

#include <sys/scsi/scsi.h>

void makecom_g0(struct scsi_pkt *pkt, struct scsi_device *devp, int flag, int cmd, int addr, int cnt);

void makecom_g0_s(struct scsi_pkt *pkt, struct scsi_device *devp, int flag, int cmd, int cnt, int fixbit);

void makecom_g1(struct scsi_pkt *pkt, struct scsi_device *devp, int flag, int cmd, int addr, int cnt);

void makecom_g5(struct scsi_pkt *pkt, struct scsi_device *devp, int flag, int cmd, int addr, int cnt);

Interface Level

Solaris DDI specific (Solaris DDI).

Arguments

pkt
Pointer to an allocated scsi_pkt(9S) structure.
devp
Pointer to the target’s scsi_device(9S) structure.
flag
Flags for the pkt_flags member.
cmd
First byte of a group 0 or 1 or 5 SCSI CDB.
addr
Pointer to the location of the data.
cnt
Number of bytes to transfer.
fixbit
Fixed bit in sequential access device commands.

Description

makecom functions initialize a packet with the specified command descriptor block, devp and transport flags. The pkt_address, pkt_flags, and the command descriptor block pointed to by pkt_cdbp are initialized using the remaining arguments. Target drivers may use makecom_g0() for Group 0 commands (except for sequential access devices), or makecom_g0_s() for Group 0 commands for sequential access devices, or makecom_g1() for Group 1 commands, or makecom_g5() for Group 5 commands. fixbit is used by sequential access devices for accessing fixed block sizes and sets the the tag portion of the SCSI CDB.

Context

These functions can be called from user or interrupt context.

Example


    if (blkno >= (1<<20)) {
            makecom_g1(pkt, SD_SCSI_DEVP, pflag, SCMD_WRITE_G1,
                (int) blkno, nblk);
    } else {
            makecom_g0(pkt, SD_SCSI_DEVP, pflag, SCMD_WRITE,
                (int) blkno, nblk);
    }

See Also

scsi_device(9S) , scsi_pkt(9S)

ANSI Small Computer System Interface-2 (SCSI-2)


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