/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

/*

 * Implementation of "scsi_vhci_f_sym" symmetric failover_ops.

 *

 * This file was historically meant for only symmetric implementation.  It has

 * been extended to manage SUN "supported" symmetric controllers. The supported

 * VID/PID shall be listed in the symmetric_dev_table.

 */

#include <sys/conf.h>

#include <sys/file.h>

#include <sys/ddi.h>

#include <sys/sunddi.h>

#include <sys/scsi/scsi.h>

#include <sys/scsi/adapters/scsi_vhci.h>

/* Supported device table entries.  */

char *symmetric_dev_table[] = {

/*	"                  111111" */

/*	"012345670123456789012345" */

/*	"|-VID--||-----PID------|" */

				/* disks */

	"IBM     DDYFT",

	"IBM     IC",

	"SEAGATE ST",

				/* enclosures */

	"SUN     SENA",			/* SES device */

	"SUN     SESS01",		/* VICOM SVE box */

	"SUNW    SUNWGS",		/* Daktari enclosure */

				/* arrays */

	"HITACHI OPEN",			/* Hitachi storage */

	"SUN     PSX1000",		/* Pirus Matterhorn */

	"SUN     SE6920",		/* Pirus */

	"SUN     SE6940",		/* DSP - Nauset */

	"SUN     StorEdge 3510",	/* Minnow FC */

	"SUN     StorEdge 3511",	/* Minnow SATA RAID */

	"SUN     StorageTek 6920",	/* DSP */

	"SUN     StorageTek 6940",	/* DSP - Nauset */

	"SUN     StorageTek NAS",	/* StorageTek NAS */

	"SUN     MRA300_R",		/* Shamrock - Controller */

	"SUN     MRA300_E",		/* Shamrock - Expansion */

	NULL

};

/* Failover module plumbing. */

/* ARGSUSED */

static int

symmetric_device_probe(struct scsi_device *sd, struct scsi_inquiry *stdinq,

void **ctpriv)

{

	char	**dt;

	VHCI_DEBUG(6, (CE_NOTE, NULL, "!inq str: %s\n", stdinq->inq_vid));

	for (dt = symmetric_dev_table; *dt; dt++)

		if (strncmp(stdinq->inq_vid, *dt, strlen(*dt)) == 0)

			return (SFO_DEVICE_PROBE_VHCI);

	/*

	 * No match, check for generic Sun supported disks:

	 *

	 *	"|-VID--||-----PID------|"

	 *	"012345670123456789012345"

	 *	".................SUN..G."

	 *	".................SUN..T."

	 *	".................SUN...G"

	 *	".................SUN...T"

	 */

	if (bcmp(&stdinq->inq_pid[9], "SUN", 3) == 0) {

		if ((stdinq->inq_pid[14] == 'G' || stdinq->inq_pid[15] == 'G' ||

		    stdinq->inq_pid[14] == 'T' || stdinq->inq_pid[15] == 'T') &&

		    (stdinq->inq_dtype == DTYPE_DIRECT)) {

			return (SFO_DEVICE_PROBE_VHCI);

		}

	}

	return (SFO_DEVICE_PROBE_PHCI);

}

/* ARGSUSED */

static void

symmetric_device_unprobe(struct scsi_device *sd, void *ctpriv)

{

	/*

	 * NOP for symmetric

	 */

}

/* ARGSUSED */

static int

symmetric_path_activate(struct scsi_device *sd, char *pathclass, void *ctpriv)

{

	return (0);

}

/* ARGSUSED */

static int

symmetric_path_deactivate(struct scsi_device *sd, char *pathclass,

void *ctpriv)

{

	return (0);

}

/* ARGSUSED */

static int

symmetric_path_get_opinfo(struct scsi_device *sd,

struct scsi_path_opinfo *opinfo, void *ctpriv)

{

	opinfo->opinfo_rev = OPINFO_REV;

	(void) strcpy(opinfo->opinfo_path_attr, "primary");

	opinfo->opinfo_path_state  = SCSI_PATH_ACTIVE;

	opinfo->opinfo_pswtch_best = 0;		/* N/A */

	opinfo->opinfo_pswtch_worst = 0;	/* N/A */

	opinfo->opinfo_xlf_capable = 0;

	opinfo->opinfo_mode = SCSI_NO_FAILOVER;

	opinfo->opinfo_preferred = 1;

	return (0);

}

/* ARGSUSED */

static int

symmetric_path_ping(struct scsi_device *sd, void *ctpriv)

{

	return (1);

}

/* ARGSUSED */

static int

symmetric_analyze_sense(struct scsi_device *sd,

struct scsi_extended_sense *sense, void *ctpriv)

{

	return (SCSI_SENSE_NOFAILOVER);

}

/* ARGSUSED */

static int

symmetric_pathclass_next(char *cur, char **nxt, void *ctpriv)

{

	if (cur == NULL) {

		*nxt = PCLASS_PRIMARY;

		return (0);

	} else if (strcmp(cur, PCLASS_PRIMARY) == 0) {

		return (ENOENT);

	} else {

		return (EINVAL);

	}

}