/* $NetBSD: isp_netbsd.c,v 1.14 1999/05/12 18:59:24 mjacob Exp $ */
/* release_5_11_99 */
/*
 * Platform (NetBSD) dependent common attachment code for Qlogic adapters.
 *
 *---------------------------------------
 * Copyright (c) 1997, 1998 by Matthew Jacob
 * NASA/Ames Research Center
 * All rights reserved.
 *---------------------------------------
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice immediately at the beginning of the file, without modification,
 *    this list of conditions, and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The author may be reached via electronic communications at
 *
 *  mjacob@nas.nasa.gov
 *  mjacob@feral.com
 *
 * or, via United States Postal Address
 *
 *  Matthew Jacob
 *  Feral Software
 *  2339 3rd Street
 *  Suite 24
 *  San Francisco, CA, 94107
 */

#include <dev/ic/isp_netbsd.h>

static void ispminphys __P((struct buf *));
static int32_t ispcmd __P((ISP_SCSI_XFER_T *));

static struct scsipi_device isp_dev = { NULL, NULL, NULL, NULL };
static int isp_poll __P((struct ispsoftc *, ISP_SCSI_XFER_T *, int));
static void isp_watch __P((void *));
static void isp_internal_restart __P((void *));

#define	FC_OPENINGS	RQUEST_QUEUE_LEN / (MAX_FC_TARG-1)
#define	PI_OPENINGS	RQUEST_QUEUE_LEN / (MAX_TARGETS-1)

/*
 * Complete attachment of hardware, include subdevices.
 */
void
isp_attach(isp)
	struct ispsoftc *isp;
{

	isp->isp_osinfo._adapter.scsipi_cmd = ispcmd;
	isp->isp_osinfo._adapter.scsipi_minphys = ispminphys;

	isp->isp_state = ISP_RUNSTATE;
	isp->isp_osinfo._link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
	isp->isp_osinfo._link.adapter_softc = isp;
	isp->isp_osinfo._link.device = &isp_dev;
	isp->isp_osinfo._link.adapter = &isp->isp_osinfo._adapter;
	TAILQ_INIT(&isp->isp_osinfo.waitq);

	if (isp->isp_type & ISP_HA_FC) {
		/*
		 * Give it another chance here to come alive...
		 */
		fcparam *fcp = isp->isp_param;
		if (fcp->isp_fwstate != FW_READY) {
			(void) isp_control(isp, ISPCTL_FCLINK_TEST, NULL);
		}
		isp->isp_osinfo._link.scsipi_scsi.max_target = MAX_FC_TARG-1;
#ifdef	ISP2100_SCCLUN
		/*
		 * 16 bits worth, but let's be reasonable..
		 */
		isp->isp_osinfo._link.scsipi_scsi.max_lun = 255;
#else
		isp->isp_osinfo._link.scsipi_scsi.max_lun = 15;
#endif
		isp->isp_osinfo._link.openings = FC_OPENINGS;
		isp->isp_osinfo._link.scsipi_scsi.adapter_target =
			((fcparam *)isp->isp_param)->isp_loopid;
	} else {
		sdparam *sdp = isp->isp_param;
		isp->isp_osinfo._link.openings = PI_OPENINGS;
		isp->isp_osinfo._link.scsipi_scsi.max_target = MAX_TARGETS-1;
		if (isp->isp_bustype == ISP_BT_SBUS) {
			isp->isp_osinfo._link.scsipi_scsi.max_lun = 7;
		} else {
			/*
			 * Too much target breakage at present.
			 */
#if	0
			if (isp->isp_fwrev >= ISP_FW_REV(7,55,0))
				isp->isp_osinfo._link.scsipi_scsi.max_lun = 31;
			else
#endif
				isp->isp_osinfo._link.scsipi_scsi.max_lun = 7;
		}
		isp->isp_osinfo._link.scsipi_scsi.adapter_target =
		    sdp->isp_initiator_id;
		if (IS_12X0(isp)) {
			isp->isp_osinfo._link_b = isp->isp_osinfo._link;
			sdp++;
			isp->isp_osinfo._link_b.scsipi_scsi.adapter_target =
			    sdp->isp_initiator_id;
			isp->isp_osinfo._link_b.scsipi_scsi.channel = 1;
		}
	}
	if (isp->isp_osinfo._link.openings < 2)
		isp->isp_osinfo._link.openings = 2;
	isp->isp_osinfo._link.type = BUS_SCSI;

	/*
	 * Send a SCSI Bus Reset (used to be done as part of attach,
	 * but now left to the OS outer layers).
	 */
	
	if (IS_SCSI(isp)) {
		int bus = 0;
		(void) isp_control(isp, ISPCTL_RESET_BUS, &bus);
		if (IS_12X0(isp)) {
			bus++;
			(void) isp_control(isp, ISPCTL_RESET_BUS, &bus);
		}
		SYS_DELAY(2*1000000);
	}

	/*
	 * Start the watchdog.
	 */
	isp->isp_dogactive = 1;
	timeout(isp_watch, isp, 30 * hz);

	/*
	 * And attach children (if any).
	 */
	config_found((void *)isp, &isp->isp_osinfo._link, scsiprint);
	if (IS_12X0(isp)) {
		config_found((void *)isp, &isp->isp_osinfo._link_b, scsiprint);
	}
}

/*
 * minphys our xfers
 *
 * Unfortunately, the buffer pointer describes the target device- not the
 * adapter device, so we can't use the pointer to find out what kind of
 * adapter we are and adjust accordingly.
 */

static void
ispminphys(bp)
	struct buf *bp;
{
	/*
	 * XX: Only the 1020 has a 24 bit limit.
	 */
	if (bp->b_bcount >= (1 << 24)) {
		bp->b_bcount = (1 << 24);
	}
	minphys(bp);
}

static int
ispcmd(xs)
	ISP_SCSI_XFER_T *xs;
{
	struct ispsoftc *isp;
	int result;
	int s;

	isp = XS_ISP(xs);
	s = splbio();
	/*
	 * This is less efficient than I would like in that the
	 * majority of cases will have to do some pointer deferences
	 * to find out that things don't need to be updated.
	 */
	if ((xs->flags & SCSI_AUTOCONF) == 0 && (isp->isp_type & ISP_HA_SCSI)) {
		sdparam *sdp = isp->isp_param;
		sdp += XS_CHANNEL(xs);
		if (sdp->isp_devparam[XS_TGT(xs)].dev_flags !=
		    sdp->isp_devparam[XS_TGT(xs)].cur_dflags) {
			u_int16_t f = DPARM_WIDE|DPARM_SYNC|DPARM_TQING;
			if (xs->sc_link->quirks & SDEV_NOSYNC)
				f &= ~DPARM_SYNC;
			if (xs->sc_link->quirks & SDEV_NOWIDE)
				f &= ~DPARM_WIDE;
			if (xs->sc_link->quirks & SDEV_NOTAG)
				f &= ~DPARM_TQING;
			sdp->isp_devparam[XS_TGT(xs)].dev_flags &=
				~(DPARM_WIDE|DPARM_SYNC|DPARM_TQING);
			sdp->isp_devparam[XS_TGT(xs)].dev_flags |= f;
			sdp->isp_devparam[XS_TGT(xs)].dev_update = 1;
			isp->isp_update |= (1 << XS_CHANNEL(xs));
		}
	}

	if (isp->isp_state < ISP_RUNSTATE) {
		DISABLE_INTS(isp);
		isp_init(isp);
                if (isp->isp_state != ISP_INITSTATE) {
			ENABLE_INTS(isp);
                        (void) splx(s);
                        XS_SETERR(xs, HBA_BOTCH);
                        return (CMD_COMPLETE);
                }
                isp->isp_state = ISP_RUNSTATE;
		ENABLE_INTS(isp);
        }

	/*
	 * Check for queue blockage...
	 */

	if (isp->isp_osinfo.blocked) {
		if (xs->flags & SCSI_POLL) {
			xs->error = XS_DRIVER_STUFFUP;
			splx(s);
			return (TRY_AGAIN_LATER);
		}
		TAILQ_INSERT_TAIL(&isp->isp_osinfo.waitq, xs, adapter_q);
		splx(s);
		return (CMD_QUEUED);
	}
	
	DISABLE_INTS(isp);
	result = ispscsicmd(xs);
	ENABLE_INTS(isp);
	if (result != CMD_QUEUED || (xs->flags & SCSI_POLL) == 0) {
		(void) splx(s);
		return (result);
	}

	/*
	 * If we can't use interrupts, poll on completion.
	 */
	if (isp_poll(isp, xs, XS_TIME(xs))) {
		/*
		 * If no other error occurred but we didn't finish,
		 * something bad happened.
		 */
		if (XS_IS_CMD_DONE(xs) == 0) {
			isp->isp_nactive--;
			if (isp->isp_nactive < 0)
				isp->isp_nactive = 0;
			if (XS_NOERR(xs)) {
				isp_lostcmd(isp, xs);
				XS_SETERR(xs, HBA_BOTCH);
			}
		}
	}
	(void) splx(s);
	return (CMD_COMPLETE);
}

static int
isp_poll(isp, xs, mswait)
	struct ispsoftc *isp;
	ISP_SCSI_XFER_T *xs;
	int mswait;
{

	while (mswait) {
		/* Try the interrupt handling routine */
		(void)isp_intr((void *)isp);

		/* See if the xs is now done */
		if (XS_IS_CMD_DONE(xs)) {
			return (0);
		}
		SYS_DELAY(1000);	/* wait one millisecond */
		mswait--;
	}
	return (1);
}

static void
isp_watch(arg)
	void *arg;
{
	int i;
	struct ispsoftc *isp = arg;
	ISP_SCSI_XFER_T *xs;
	ISP_ILOCKVAL_DECL;

	/*
	 * Look for completely dead commands (but not polled ones).
	 */
	ISP_ILOCK(isp);
	for (i = 0; i < RQUEST_QUEUE_LEN; i++) {
		if ((xs = (ISP_SCSI_XFER_T *) isp->isp_xflist[i]) == NULL) {
			continue;
		}
		if (XS_TIME(xs) == 0) {
			continue;
		}
		XS_TIME(xs) -= (WATCH_INTERVAL * 1000);
		/*
		 * Avoid later thinking that this
		 * transaction is not being timed.
		 * Then give ourselves to watchdog
		 * periods of grace.
		 */
		if (XS_TIME(xs) == 0) {
			XS_TIME(xs) = 1;
		} else if (XS_TIME(xs) > -(2 * WATCH_INTERVAL * 1000)) {
			continue;
		}
		if (isp_control(isp, ISPCTL_ABORT_CMD, xs)) {
			printf("%s: isp_watch failed to abort command\n",
			    isp->isp_name);
			isp_restart(isp);
			break;
		}
	}
	timeout(isp_watch, isp, WATCH_INTERVAL * hz);
	isp->isp_dogactive = 1;
	ISP_IUNLOCK(isp);
}

/*
 * Free any associated resources prior to decommissioning and
 * set the card to a known state (so it doesn't wake up and kick
 * us when we aren't expecting it to).
 *
 * Locks are held before coming here.
 */
void
isp_uninit(isp)
	struct ispsoftc *isp;
{
	ISP_ILOCKVAL_DECL;
	ISP_ILOCK(isp);
	/*
	 * Leave with interrupts disabled.
	 */
	DISABLE_INTS(isp);

	/*
	 * Turn off the watchdog (if active).
	 */
	if (isp->isp_dogactive) {
		untimeout(isp_watch, isp);
		isp->isp_dogactive = 0;
	}

	ISP_IUNLOCK(isp);
}

/*
 * Restart function after a LOOP UP event (e.g.),
 * done as a timeout for some hysteresis.
 */
static void
isp_internal_restart(arg)
	void *arg;
{
	struct ispsoftc *isp = arg;
	int result, nrestarted = 0, s;

	s = splbio();
	if (isp->isp_osinfo.blocked == 0) {
		struct scsipi_xfer *xs;
		while ((xs = TAILQ_FIRST(&isp->isp_osinfo.waitq)) != NULL) {
			TAILQ_REMOVE(&isp->isp_osinfo.waitq, xs, adapter_q);
			DISABLE_INTS(isp);
			result = ispscsicmd(xs);
			ENABLE_INTS(isp);
			if (result != CMD_QUEUED) {
				printf("%s: botched command restart (0x%x)\n",
				    isp->isp_name, result);
				xs->flags |= ITSDONE;
				if (xs->error == XS_NOERROR)
					xs->error = XS_DRIVER_STUFFUP;
				scsipi_done(xs);
			}
			nrestarted++;
		}
		printf("%s: requeued %d commands\n", isp->isp_name, nrestarted);
	}
	(void) splx(s);
}
	
int
isp_async(isp, cmd, arg)
	struct ispsoftc *isp;
	ispasync_t cmd;
	void *arg;
{
	int bus, tgt;
	int s = splbio();
	switch (cmd) {
	case ISPASYNC_NEW_TGT_PARAMS:
		if (isp->isp_type & ISP_HA_SCSI) {
			sdparam *sdp = isp->isp_param;
			char *wt;
			int mhz, flags, period;

			tgt = *((int *) arg);
			bus = (tgt >> 16) & 0xffff;
			tgt &= 0xffff;

			flags = sdp->isp_devparam[tgt].cur_dflags;
			period = sdp->isp_devparam[tgt].cur_period;
			if ((flags & DPARM_SYNC) && period &&
			    (sdp->isp_devparam[tgt].cur_offset) != 0) {
				if (sdp->isp_lvdmode) {
					switch (period) {
					case 0xa:
						mhz = 40;
						break;
					case 0xb:
						mhz = 33;
						break;
					case 0xc:
						mhz = 25;
						break;
					default:
						mhz = 1000 / (period * 4);
						break;
					}
				} else {
					mhz = 1000 / (period * 4);
				}
			} else {
				mhz = 0;
			}
			switch (flags & (DPARM_WIDE|DPARM_TQING)) {
			case DPARM_WIDE:
				wt = ", 16 bit wide\n";
				break;
			case DPARM_TQING:
				wt = ", Tagged Queueing Enabled\n";
				break;
			case DPARM_WIDE|DPARM_TQING:
				wt = ", 16 bit wide, Tagged Queueing Enabled\n";
				break;
			default:
				wt = "\n";
				break;
			}
			if (mhz) {
				printf("%s: Bus %d Target %d at %dMHz Max "
				    "Offset %d%s", isp->isp_name, bus, tgt, mhz,
				    sdp->isp_devparam[tgt].cur_offset, wt);
			} else {
				printf("%s: Bus %d Target %d Async Mode%s",
				    isp->isp_name, bus, tgt, wt);
			}
		}
		break;
	case ISPASYNC_BUS_RESET:
		if (arg)
			bus = *((int *) arg);
		else
			bus = 0;
		printf("%s: SCSI bus %d reset detected\n", isp->isp_name, bus);
		break;
	case ISPASYNC_LOOP_DOWN:
		/*
		 * Hopefully we get here in time to minimize the number
		 * of commands we are firing off that are sure to die.
		 */
		isp->isp_osinfo.blocked = 1;
		printf("%s: Loop DOWN\n", isp->isp_name);
		break;
        case ISPASYNC_LOOP_UP:
		isp->isp_osinfo.blocked = 0;
		timeout(isp_internal_restart, isp, 1);
		printf("%s: Loop UP\n", isp->isp_name);
		break;
	case ISPASYNC_PDB_CHANGE_COMPLETE:
	if (isp->isp_type & ISP_HA_FC) {
		static char *roles[4] = {
		    "No", "Target", "Initiator", "Target/Initiator"
		};
		long tgt = (long) arg;
		isp_pdb_t *pdbp = &((fcparam *)isp->isp_param)->isp_pdb[tgt];
		printf("%s: Loop ID %d, %s role\n",
		    isp->isp_name, pdbp->pdb_loopid,
		    roles[(pdbp->pdb_prli_svc3 >> 4) & 0x3]);
		printf("     Node Address 0x%x WWN 0x"
		    "%02x%02x%02x%02x%02x%02x%02x%02x\n",
		    BITS2WORD(pdbp->pdb_portid_bits),
		    pdbp->pdb_portname[0], pdbp->pdb_portname[1],
		    pdbp->pdb_portname[2], pdbp->pdb_portname[3],
		    pdbp->pdb_portname[4], pdbp->pdb_portname[5],
		    pdbp->pdb_portname[6], pdbp->pdb_portname[7]);
		if (pdbp->pdb_options & PDB_OPTIONS_ADISC)
			printf("     Hard Address 0x%x WWN 0x"
			    "%02x%02x%02x%02x%02x%02x%02x%02x\n",
			    BITS2WORD(pdbp->pdb_hardaddr_bits),
			    pdbp->pdb_nodename[0],
			    pdbp->pdb_nodename[1],
			    pdbp->pdb_nodename[2],
			    pdbp->pdb_nodename[3],
			    pdbp->pdb_nodename[4],
			    pdbp->pdb_nodename[5],
			    pdbp->pdb_nodename[6],
			    pdbp->pdb_nodename[7]);
		switch (pdbp->pdb_prli_svc3 & SVC3_ROLE_MASK) {
		case SVC3_TGT_ROLE|SVC3_INI_ROLE:
			printf("     Master State=%s, Slave State=%s\n",
			    isp2100_pdb_statename(pdbp->pdb_mstate),
			    isp2100_pdb_statename(pdbp->pdb_sstate));
			break;
		case SVC3_TGT_ROLE:
			printf("     Master State=%s\n",
			    isp2100_pdb_statename(pdbp->pdb_mstate));
			break;
		case SVC3_INI_ROLE:
			printf("     Slave State=%s\n",
			    isp2100_pdb_statename(pdbp->pdb_sstate));
			break;
		default:
			break;
		}
		break;
	}
	case ISPASYNC_CHANGE_NOTIFY:
		printf("%s: Name Server Database Changed\n", isp->isp_name);
		break;
	default:
		break;
	}
	(void) splx(s);
	return (0);
}