wd.c

国产CPU－龙芯（loongson)BIOS源代码

/*	$OpenBSD: wd.c,v 1.12 2000/04/10 07:06:16 csapuntz Exp $ */
/*	$NetBSD: wd.c,v 1.193 1999/02/28 17:15:27 explorer Exp $ */

/*
 * Copyright (c) 1998 Manuel Bouyer.  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, 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. All advertising materials mentioning features or use of this software
 *	must display the following acknowledgement:
 *  This product includes software developed by Manuel Bouyer.
 * 4. 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 ``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 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.
 */

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum and by Onno van der Linden.
 *
 * 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, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#if 0
#include "rnd.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <sys/vnode.h>

#include <vm/vm.h>

#include <machine/intr.h>
#include <machine/bus.h>

#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ata/wdvar.h>
#include <dev/ic/wdcreg.h>
#include <sys/ataio.h>
#if 0
#include "locators.h"
#endif

#define	WAITTIME	(4 * hz)	/* time to wait for a completion */
#define	WDIORETRIES_SINGLE 4	/* number of retries before single-sector */
#define	WDIORETRIES	5	/* number of retries before giving up */
#define	RECOVERYTIME hz/2	/* time to wait before retrying a cmd */

#define	WDUNIT(dev)		DISKUNIT(dev)
#ifndef PMON
#define	WDPART(dev)		DISKPART(dev)
#else
#define	WDPART(dev)		RAW_PART
#endif
#define WDMINOR(unit, part)     DISKMINOR(unit, part)
#define	MAKEWDDEV(maj, unit, part)	MAKEDISKDEV(maj, unit, part)

#define	WDLABELDEV(dev)	(MAKEWDDEV(major(dev), WDUNIT(dev), RAW_PART))

#define DEBUG_INTR   0x01
#define DEBUG_XFERS  0x02
#define DEBUG_STATUS 0x04
#define DEBUG_FUNCS  0x08
#define DEBUG_PROBE  0x10
#ifdef WDCDEBUG
extern int wdcdebug_wd_mask; /* init'ed in ata_wdc.c */
#define WDCDEBUG_PRINT(args, level) \
	if (wdcdebug_wd_mask & (level)) \
		printf args
#else
#define WDCDEBUG_PRINT(args, level)
#endif

#ifdef PMON
#define device_unref(x)
#define readdisklabel(x1, x2, x3, x4, x5) "no label"
#endif

struct wd_softc {
	/* General disk infos */
	struct device sc_dev;
	struct disk sc_dk;
	struct buf sc_q;
	/* IDE disk soft states */
	struct ata_bio sc_wdc_bio; /* current transfer */
	struct buf *sc_bp; /* buf being transfered */
	struct ata_drive_datas *drvp; /* Our controller's infos */
	int openings;
	struct ataparams sc_params;/* drive characteistics found */
	int sc_flags;	  
#define WDF_LOCKED	  0x01
#define WDF_WANTED	  0x02
#define WDF_WLABEL	  0x04 /* label is writable */
#define WDF_LABELLING   0x08 /* writing label */
/*
 * XXX Nothing resets this yet, but disk change sensing will when ATA-4 is
 * more fully implemented.
 */
#define WDF_LOADED	  0x10 /* parameters loaded */
#define WDF_WAIT	0x20 /* waiting for resources */
#define WDF_LBA	 0x40 /* using LBA mode */

	int sc_capacity;
	int cyl; /* actual drive parameters */
	int heads;
	int sectors;
	int retries; /* number of xfer retry */
#if NRND > 0
	rndsource_element_t	rnd_source;
#endif
	void *sc_sdhook;
};

#define sc_drive sc_wdc_bio.drive
#define sc_mode sc_wdc_bio.mode
#define sc_multi sc_wdc_bio.multi
#define sc_badsect sc_wdc_bio.badsect

#ifndef __OpenBSD__
int	wdprobe		__P((struct device *, struct cfdata *, void *));
#else
int	wdprobe		__P((struct device *, void *, void *));
#endif
void	wdattach	__P((struct device *, struct device *, void *));
#ifndef PMON
int     wddetach __P((struct device *, int));
int     wdactivate __P((struct device *, enum devact));
void    wdzeroref __P((struct device *));
#endif
int	wdprint	__P((void *, char *));

struct cfattach wd_ca = {
	sizeof(struct wd_softc), wdprobe, wdattach,
#ifndef PMON
	wddetach, wdactivate, wdzeroref
#endif
};

#ifdef __OpenBSD__
struct cfdriver wd_cd = {
	NULL, "wd", DV_DISK
};
#else
extern struct cfdriver wd_cd;
#endif

/*
 * Glue necessary to hook WDCIOCCOMMAND into physio
 */

struct wd_ioctl {
	LIST_ENTRY(wd_ioctl) wi_list;
	struct buf wi_bp;
	struct uio wi_uio;
	struct iovec wi_iov;
	atareq_t wi_atareq;
	struct wd_softc *wi_softc;
};

LIST_HEAD(, wd_ioctl) wi_head;

struct	wd_ioctl *wi_find __P((struct buf *));
void	wi_free __P((struct wd_ioctl *));
struct	wd_ioctl *wi_get __P((void));
void	wdioctlstrategy __P((struct buf *));

void  wdgetdefaultlabel __P((struct wd_softc *, struct disklabel *));
void  wdgetdisklabel __P((dev_t dev, struct wd_softc *, 
				 struct disklabel *,
				 struct cpu_disklabel *, int));
void  wdstrategy	__P((struct buf *));
void  wdstart	__P((void *));
void  __wdstart	__P((struct wd_softc*, struct buf *));
void  wdrestart __P((void*));
int   wd_get_params __P((struct wd_softc *, u_int8_t, struct ataparams *));
void  wd_flushcache __P((struct wd_softc *, int));
void  wd_shutdown __P((void*));

struct dkdriver wddkdriver = { wdstrategy };

/* XXX: these should go elsewhere */
cdev_decl(wd);
bdev_decl(wd);

#ifdef DKBAD
void	bad144intern __P((struct wd_softc *));
#endif

#ifndef PMON
#define wdlock(wd)  disk_lock(&(wd)->sc_dk)
#define wdunlock(wd)  disk_unlock(&(wd)->sc_dk)
#else
#define wdlock(wd)  (0)
#define wdunlock(wd)
#endif
#define wdlookup(unit) (struct wd_softc *)device_lookup(&wd_cd, (unit))


int
wdprobe(parent, match_, aux)
	struct device *parent;
#ifndef __OpenBSD__
	struct cfdata *match;
#else
	void *match_;
#endif
	void *aux;
{
	struct ata_atapi_attach *aa_link = aux;
	struct cfdata *match = match_;

	if (aa_link == NULL)
		return 0;
	if (aa_link->aa_type != T_ATA)
		return 0;

#ifndef __OpenBSD__
	if (match->cf_loc[ATACF_CHANNEL] != ATACF_CHANNEL_DEFAULT &&
	    match->cf_loc[ATACF_CHANNEL] != aa_link->aa_channel)
		return 0;

	if (match->cf_loc[ATACF_DRIVE] != ATACF_DRIVE_DEFAULT &&
	    match->cf_loc[ATACF_DRIVE] != aa_link->aa_drv_data->drive)
		return 0;
#else
	if (match->cf_loc[0] != -1 &&
	    match->cf_loc[0] != aa_link->aa_channel)
		return 0;

	if (match->cf_loc[1] != -1 &&
	    match->cf_loc[1] != aa_link->aa_drv_data->drive)
		return 0;
#endif

	return 1;
}

void
wdattach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct wd_softc *wd = (void *)self;
	struct ata_atapi_attach *aa_link= aux;
	int i, blank;
	char buf[41], c, *p, *q;
	WDCDEBUG_PRINT(("wdattach\n"), DEBUG_FUNCS | DEBUG_PROBE);

	wd->openings = aa_link->aa_openings;
	wd->drvp = aa_link->aa_drv_data;

	strncpy(wd->drvp->drive_name, wd->sc_dev.dv_xname, 
		sizeof(wd->drvp->drive_name) - 1);
	wd->drvp->cf_flags = wd->sc_dev.dv_cfdata->cf_flags;

	/* read our drive info */
	if (wd_get_params(wd, at_poll, &wd->sc_params) != 0) {
		printf("%s: IDENTIFY failed\n", wd->sc_dev.dv_xname);
		return;
	}

	for (blank = 0, p = wd->sc_params.atap_model, q = buf, i = 0;
	    i < sizeof(wd->sc_params.atap_model); i++) {
		c = *p++;
		if (c == '\0')
			break;
		if (c != ' ') {
			if (blank) {
				*q++ = ' ';
				blank = 0;
			}
			*q++ = c;
		} else
			blank = 1;
		}
	*q++ = '\0';

	printf(": <%s>\n", buf);

	wdc_probe_caps(wd->drvp, &wd->sc_params);
	wdc_print_caps(wd->drvp);

	if ((wd->sc_params.atap_multi & 0xff) > 1) {
		wd->sc_multi = wd->sc_params.atap_multi & 0xff;
	} else {
		wd->sc_multi = 1;
	}

	printf("%s: %d-sector PIO,", wd->sc_dev.dv_xname, wd->sc_multi);

	/* Prior to ATA-4, LBA was optional. */
	if ((wd->sc_params.atap_capabilities1 & WDC_CAP_LBA) != 0)
		wd->sc_flags |= WDF_LBA;
#if 0
	/* ATA-4 requires LBA. */
	if (wd->sc_params.atap_ataversion != 0xffff &&
	    wd->sc_params.atap_ataversion >= WDC_VER_ATA4)
		wd->sc_flags |= WDF_LBA;
#endif

	if ((wd->sc_flags & WDF_LBA) != 0) {
		wd->sc_capacity =
		    (wd->sc_params.atap_capacity[1] << 16) |
		    wd->sc_params.atap_capacity[0];
		printf(" LBA, %dMB, %d cyl, %d head, %d sec, %d sectors\n",
		    wd->sc_capacity / (1048576 / DEV_BSIZE),
		    wd->sc_params.atap_cylinders,
		    wd->sc_params.atap_heads,
		    wd->sc_params.atap_sectors,
		    wd->sc_capacity);
	} else {
		wd->sc_capacity =
		    wd->sc_params.atap_cylinders *
		    wd->sc_params.atap_heads *
		    wd->sc_params.atap_sectors;
		printf(" CHS, %dMB, %d cyl, %d head, %d sec, %d sectors\n",
		    wd->sc_capacity / (1048576 / DEV_BSIZE),
		    wd->sc_params.atap_cylinders,
		    wd->sc_params.atap_heads,
		    wd->sc_params.atap_sectors,
		    wd->sc_capacity);
	}
	WDCDEBUG_PRINT(("%s: atap_dmatiming_mimi=%d, atap_dmatiming_recom=%d\n",
	    self->dv_xname, wd->sc_params.atap_dmatiming_mimi,
	    wd->sc_params.atap_dmatiming_recom), DEBUG_PROBE);
	/*
	 * Initialize and attach the disk structure.
	 */
	wd->sc_dk.dk_driver = &wddkdriver;
	wd->sc_dk.dk_name = wd->sc_dev.dv_xname;
#ifndef PMON
	disk_attach(&wd->sc_dk);
#endif
	wd->sc_wdc_bio.lp = wd->sc_dk.dk_label;
	wd->sc_sdhook = shutdownhook_establish(wd_shutdown, wd);
	if (wd->sc_sdhook == NULL)
		printf("%s: WARNING: unable to establish shutdown hook\n",
		    wd->sc_dev.dv_xname); 
#if NRND > 0
	rnd_attach_source(&wd->rnd_source, wd->sc_dev.dv_xname,
			  RND_TYPE_DISK, 0);
#endif
}

#ifndef PMON

int
wdactivate(self, act)
        struct device *self;
        enum devact act;
{
        int rv = 0;

        switch (act) {
        case DVACT_ACTIVATE:
                break;

        case DVACT_DEACTIVATE:
                /*
                 * Nothing to do; we key off the device's DVF_ACTIVATE.
                 */
                break;
        }
        return (rv);
}


int
wddetach(self, flags)
        struct device *self;
        int flags;
{
        struct wd_softc *sc = (struct wd_softc *)self;
        struct buf *dp, *bp;
        int s, bmaj, cmaj, mn;

	/* Remove unprocessed buffers from queue */
	s = splbio();
	for (dp = &sc->sc_q; (bp = dp->b_actf) != NULL; ) {
		dp->b_actf = bp->b_actf;
		
		bp->b_error = ENXIO;
		bp->b_flags |= B_ERROR;
		biodone(bp);
	}
	splx(s);

        /* locate the major number */
        mn = WDMINOR(self->dv_unit, 0);

        for (bmaj = 0; bmaj < nblkdev; bmaj++)
                if (bdevsw[bmaj].d_open == wdopen)
			vdevgone(bmaj, mn, mn + MAXPARTITIONS - 1, VBLK);
        for (cmaj = 0; cmaj < nchrdev; cmaj++)
                if (cdevsw[cmaj].d_open == wdopen)
			vdevgone(cmaj, mn, mn + MAXPARTITIONS - 1, VCHR);

	/* Get rid of the shutdown hook. */
	if (sc->sc_sdhook != NULL)
		shutdownhook_disestablish(sc->sc_sdhook);

#if NRND > 0
        /* Unhook the entropy source. */
        rnd_detach_source(&sc->rnd_source);
#endif

        return (0);
}

void
wdzeroref(self)
        struct device *self;
{
        struct wd_softc *sc = (struct wd_softc *)self;

        /* Detach disk. */
        disk_detach(&sc->sc_dk);
}

#endif /* PMON */

/*
 * Read/write routine for a buffer.  Validates the arguments and schedules the
 * transfer.  Does not wait for the transfer to complete.
 */
void
wdstrategy(bp)
	struct buf *bp;
{
	struct wd_softc *wd;
	int s;

	wd = wdlookup(WDUNIT(bp->b_dev));
	if (wd == NULL) {
		bp->b_error = ENXIO;
		goto bad;
	}

	WDCDEBUG_PRINT(("wdstrategy (%s)\n", wd->sc_dev.dv_xname),
	    DEBUG_XFERS);
	
	/* Valid request?  */
	if (bp->b_blkno < 0 ||
	    (bp->b_bcount % wd->sc_dk.dk_label->d_secsize) != 0 ||
	    (bp->b_bcount / wd->sc_dk.dk_label->d_secsize) >= (1 << NBBY)) {
		bp->b_error = EINVAL;
		goto bad;
	}
	
	/* If device invalidated (e.g. media change, door open), error. */
	if ((wd->sc_flags & WDF_LOADED) == 0) {
		bp->b_error = EIO;
		goto bad;
	}

	/* If it's a null transfer, return immediately. */
	if (bp->b_bcount == 0)
		goto done;

	/*
	 * Do bounds checking, adjust transfer. if error, process.
	 * If end of partition, just return.
	 */
#ifndef PMON
	if (WDPART(bp->b_dev) != RAW_PART &&
	    bounds_check_with_label(bp, wd->sc_dk.dk_label, wd->sc_dk.dk_cpulabel,
	    (wd->sc_flags & (WDF_WLABEL|WDF_LABELLING)) != 0) <= 0)
		goto done;
#endif
	/* Queue transfer on drive, activate drive and controller if idle. */
	s = splbio();
	disksort(&wd->sc_q, bp);
	wdstart(wd);
	splx(s);
	device_unref(&wd->sc_dev);
	return;
bad:
	bp->b_flags |= B_ERROR;
done:
	/* Toss transfer; we're done early. */
	bp->b_resid = bp->b_bcount;