/*
 * 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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */



#include "Trace.h"
#include "HBA.h"
#include "HBAPort.h"
#include "Exceptions.h"
#include "sun_fc.h"
#include <unistd.h>

#define     BUSY_SLEEP          10000 /* 1/10 second */
#define     BUSY_RETRY_TIMER    5000000000ULL /* Retry for 5 seconds */
#ifdef  __cplusplus
extern "C" {
#endif

/**
 * @memo            Send a SCSI report luns command to a remote WWN
 * @return          HBA_STATUS_OK or other error code
 *                  scsiStatus should be checked to ensure SCSI command
 *                  was a success.
 * @param           handle The HBA to operate on
 * @param           portWWN Indicates the HBA port to send command through
 * @param           targetPortWWN Indicates the target to send command to
 * @param           responseBuffer User-allocated response buffer
 * @param           responseSize Size of User-allocated response buffer
 * @param           scsiStatus User-allocated scsi status byte
 *
 * @doc             This routine will attempt a limited number of retries
 *                  When busy or again errors are encountered.
 */
HBA_STATUS Sun_fcScsiReportLUNsV2(HBA_HANDLE handle, HBA_WWN portWWN,
            HBA_WWN targetPortWWN,
            void *responseBuffer, HBA_UINT32 *responseSize,
            HBA_UINT8 *scsiStatus,
            void *senseBuffer, HBA_UINT32 *senseSize) {
        Trace log("Sun_fcScsiReportLUNsV2");

        HBA_STATUS              status = HBA_STATUS_OK;

        hrtime_t start = gethrtime();
        hrtime_t end = start + BUSY_RETRY_TIMER;
        for (hrtime_t cur = start; cur < end; cur = gethrtime()) {
            try {
                Handle *myHandle = Handle::findHandle(handle);
                HBA *hba = myHandle->getHBA();
                HBAPort *port = hba->getPort(wwnConversion(portWWN.wwn));
                port->sendReportLUNs(wwnConversion(targetPortWWN.wwn),
                        responseBuffer, responseSize, scsiStatus,
                        senseBuffer, senseSize);
                return (HBA_STATUS_OK);
            } catch (BusyException &e) {
                usleep(BUSY_SLEEP);
                status = HBA_STATUS_ERROR_BUSY;
                continue;
            } catch (TryAgainException &e) {
                usleep(BUSY_SLEEP);
                status = HBA_STATUS_ERROR_TRY_AGAIN;
                continue;
            } catch (HBAException &e) {
                return (e.getErrorCode());
            } catch (...) {
                log.internalError(
                    "Uncaught exception");
                return (HBA_STATUS_ERROR);
            }
        }
        return (status);
}
#ifdef  __cplusplus
}
#endif