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NetBSD/sys/dev/ata/ata_wdc.c
bouyer 638e1a6958 Improve the downgrade logic: 
- If UDMA 2 is failing try UDMA 1 first, it helps in some cases
- downgrade if we get an error in the first 4000 xfers, or if we get
  4 errors in 4000 xfers if the first 4000 went without troubles.

While I'm there commit a local change I have since some time to get my CD
probed: issue a "blanck" IDENTIFY before the one used to detect slave ghosts,
with my drive the first IDENTIFY following a controller reset fails with an
aborted command ...
2000-01-17 00:01:00 +00:00

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/* $NetBSD: ata_wdc.c,v 1.23 2000/01/17 00:01:00 bouyer Exp $ */
/*
* Copyright (c) 1998 Manuel Bouyer.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
*/
/*-
* 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, by Onno van der Linden and by Manuel Bouyer.
*
* 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.
*/
#ifndef WDCDEBUG
#define WDCDEBUG
#endif /* WDCDEBUG */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <machine/intr.h>
#include <machine/bus.h>
#ifndef __BUS_SPACE_HAS_STREAM_METHODS
#define bus_space_write_multi_stream_2 bus_space_write_multi_2
#define bus_space_write_multi_stream_4 bus_space_write_multi_4
#define bus_space_read_multi_stream_2 bus_space_read_multi_2
#define bus_space_read_multi_stream_4 bus_space_read_multi_4
#endif /* __BUS_SPACE_HAS_STREAM_METHODS */
#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcreg.h>
#include <dev/ic/wdcvar.h>
#include <dev/ata/wdvar.h>
#define DEBUG_INTR 0x01
#define DEBUG_XFERS 0x02
#define DEBUG_STATUS 0x04
#define DEBUG_FUNCS 0x08
#define DEBUG_PROBE 0x10
#ifdef WDCDEBUG
int wdcdebug_wd_mask = 0;
#define WDCDEBUG_PRINT(args, level) \
if (wdcdebug_wd_mask & (level)) \
printf args
#else
#define WDCDEBUG_PRINT(args, level)
#endif
#define ATA_DELAY 10000 /* 10s for a drive I/O */
void wdc_ata_bio_start __P((struct channel_softc *,struct wdc_xfer *));
void _wdc_ata_bio_start __P((struct channel_softc *,struct wdc_xfer *));
int wdc_ata_bio_intr __P((struct channel_softc *, struct wdc_xfer *, int));
void wdc_ata_bio_kill_xfer __P((struct channel_softc *,struct wdc_xfer *));
void wdc_ata_bio_done __P((struct channel_softc *, struct wdc_xfer *));
int wdc_ata_ctrl_intr __P((struct channel_softc *, struct wdc_xfer *, int));
int wdc_ata_err __P((struct ata_drive_datas *, struct ata_bio *));
#define WDC_ATA_NOERR 0x00 /* Drive doesn't report an error */
#define WDC_ATA_RECOV 0x01 /* There was a recovered error */
#define WDC_ATA_ERR 0x02 /* Drive reports an error */
/*
* Handle block I/O operation. Return WDC_COMPLETE, WDC_QUEUED, or
* WDC_TRY_AGAIN. Must be called at splio().
*/
int
wdc_ata_bio(drvp, ata_bio)
struct ata_drive_datas *drvp;
struct ata_bio *ata_bio;
{
struct wdc_xfer *xfer;
struct channel_softc *chp = drvp->chnl_softc;
xfer = wdc_get_xfer(WDC_NOSLEEP);
if (xfer == NULL)
return WDC_TRY_AGAIN;
if (ata_bio->flags & ATA_POLL)
xfer->c_flags |= C_POLL;
if ((drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) &&
(ata_bio->flags & ATA_SINGLE) == 0)
xfer->c_flags |= C_DMA;
xfer->drive = drvp->drive;
xfer->cmd = ata_bio;
xfer->databuf = ata_bio->databuf;
xfer->c_bcount = ata_bio->bcount;
xfer->c_start = wdc_ata_bio_start;
xfer->c_intr = wdc_ata_bio_intr;
xfer->c_kill_xfer = wdc_ata_bio_kill_xfer;
wdc_exec_xfer(chp, xfer);
return (ata_bio->flags & ATA_ITSDONE) ? WDC_COMPLETE : WDC_QUEUED;
}
void
wdc_ata_bio_start(chp, xfer)
struct channel_softc *chp;
struct wdc_xfer *xfer;
{
struct ata_bio *ata_bio = xfer->cmd;
WDCDEBUG_PRINT(("wdc_ata_bio_start %s:%d:%d\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive),
DEBUG_XFERS);
/* start timeout machinery */
if ((ata_bio->flags & ATA_POLL) == 0)
timeout(wdctimeout, chp, ATA_DELAY / 1000 * hz);
_wdc_ata_bio_start(chp, xfer);
}
void
_wdc_ata_bio_start(chp, xfer)
struct channel_softc *chp;
struct wdc_xfer *xfer;
{
struct ata_bio *ata_bio = xfer->cmd;
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
u_int16_t cyl;
u_int8_t head, sect, cmd = 0;
int nblks;
int ata_delay;
int dma_flags = 0;
WDCDEBUG_PRINT(("_wdc_ata_bio_start %s:%d:%d\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive),
DEBUG_INTR | DEBUG_XFERS);
/* Do control operations specially. */
if (drvp->state < READY) {
/*
* Actually, we want to be careful not to mess with the control
* state if the device is currently busy, but we can assume
* that we never get to this point if that's the case.
*/
/* at this point, we should only be in RECAL state */
if (drvp->state != RECAL) {
printf("%s:%d:%d: bad state %d in _wdc_ata_bio_start\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive, drvp->state);
panic("_wdc_ata_bio_start: bad state");
}
xfer->c_intr = wdc_ata_ctrl_intr;
bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh,
WDSD_IBM | (xfer->drive << 4));
if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY) != 0)
goto timeout;
wdccommandshort(chp, xfer->drive, WDCC_RECAL);
drvp->state = RECAL_WAIT;
if ((ata_bio->flags & ATA_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT;
} else {
/* Wait for at last 400ns for status bit to be valid */
DELAY(1);
wdc_ata_ctrl_intr(chp, xfer, 0);
}
return;
}
if (xfer->c_flags & C_DMA) {
if (drvp->n_xfers <= NXFER)
drvp->n_xfers++;
dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0;
dma_flags |= (ata_bio->flags & ATA_POLL) ? WDC_DMA_POLL : 0;
}
if (ata_bio->flags & ATA_SINGLE)
ata_delay = ATA_DELAY;
else
ata_delay = ATA_DELAY;
again:
/*
*
* When starting a multi-sector transfer, or doing single-sector
* transfers...
*/
if (xfer->c_skip == 0 || (ata_bio->flags & ATA_SINGLE) != 0) {
if (ata_bio->flags & ATA_SINGLE)
nblks = 1;
else
nblks = xfer->c_bcount / ata_bio->lp->d_secsize;
/* Check for bad sectors and adjust transfer, if necessary. */
if ((ata_bio->lp->d_flags & D_BADSECT) != 0) {
long blkdiff;
int i;
for (i = 0; (blkdiff = ata_bio->badsect[i]) != -1;
i++) {
blkdiff -= ata_bio->blkno;
if (blkdiff < 0)
continue;
if (blkdiff == 0) {
/* Replace current block of transfer. */
ata_bio->blkno =
ata_bio->lp->d_secperunit -
ata_bio->lp->d_nsectors - i - 1;
}
if (blkdiff < nblks) {
/* Bad block inside transfer. */
ata_bio->flags |= ATA_SINGLE;
nblks = 1;
}
break;
}
/* Transfer is okay now. */
}
if (ata_bio->flags & ATA_LBA) {
sect = (ata_bio->blkno >> 0) & 0xff;
cyl = (ata_bio->blkno >> 8) & 0xffff;
head = (ata_bio->blkno >> 24) & 0x0f;
head |= WDSD_LBA;
} else {
int blkno = ata_bio->blkno;
sect = blkno % ata_bio->lp->d_nsectors;
sect++; /* Sectors begin with 1, not 0. */
blkno /= ata_bio->lp->d_nsectors;
head = blkno % ata_bio->lp->d_ntracks;
blkno /= ata_bio->lp->d_ntracks;
cyl = blkno;
head |= WDSD_CHS;
}
if (xfer->c_flags & C_DMA) {
ata_bio->nblks = nblks;
ata_bio->nbytes = xfer->c_bcount;
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READDMA : WDCC_WRITEDMA;
nblks = ata_bio->nblks;
/* Init the DMA channel. */
if ((*chp->wdc->dma_init)(chp->wdc->dma_arg,
chp->channel, xfer->drive,
(char *)xfer->databuf + xfer->c_skip,
ata_bio->nbytes, dma_flags) != 0) {
ata_bio->error = ERR_DMA;
ata_bio->r_error = 0;
wdc_ata_bio_done(chp, xfer);
return;
}
/* Initiate command */
bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh,
WDSD_IBM | (xfer->drive << 4));
if (wait_for_ready(chp, ata_delay) < 0)
goto timeout;
wdccommand(chp, xfer->drive, cmd, cyl,
head, sect, nblks, 0);
/* start the DMA channel */
(*chp->wdc->dma_start)(chp->wdc->dma_arg,
chp->channel, xfer->drive, dma_flags);
/* wait for irq */
goto intr;
} /* else not DMA */
ata_bio->nblks = min(nblks, ata_bio->multi);
ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize;
if (ata_bio->nblks > 1 && (ata_bio->flags & ATA_SINGLE) == 0) {
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READMULTI : WDCC_WRITEMULTI;
} else {
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READ : WDCC_WRITE;
}
/* Initiate command! */
bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh,
WDSD_IBM | (xfer->drive << 4));
if (wait_for_ready(chp, ata_delay) < 0)
goto timeout;
wdccommand(chp, xfer->drive, cmd, cyl,
head, sect, nblks,
(ata_bio->lp->d_type == DTYPE_ST506) ?
ata_bio->lp->d_precompcyl / 4 : 0);
} else if (ata_bio->nblks > 1) {
/* The number of blocks in the last stretch may be smaller. */
nblks = xfer->c_bcount / ata_bio->lp->d_secsize;
if (ata_bio->nblks > nblks) {
ata_bio->nblks = nblks;
ata_bio->nbytes = xfer->c_bcount;
}
}
/* If this was a write and not using DMA, push the data. */
if ((ata_bio->flags & ATA_READ) == 0) {
if (wait_for_drq(chp, ata_delay) != 0) {
printf("%s:%d:%d: timeout waiting for DRQ, "
"st=0x%02x, err=0x%02x\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive, chp->ch_status, chp->ch_error);
if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR)
ata_bio->error = TIMEOUT;
wdc_ata_bio_done(chp, xfer);
return;
}
if (wdc_ata_err(drvp, ata_bio) == WDC_ATA_ERR) {
wdc_ata_bio_done(chp, xfer);
return;
}
if ((chp->wdc->cap & WDC_CAPABILITY_ATA_NOSTREAM)) {
if (drvp->drive_flags & DRIVE_CAP32) {
bus_space_write_multi_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 2);
} else {
bus_space_write_multi_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 1);
}
} else {
if (drvp->drive_flags & DRIVE_CAP32) {
bus_space_write_multi_stream_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 2);
} else {
bus_space_write_multi_stream_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 1);
}
}
}
intr: /* Wait for IRQ (either real or polled) */
if ((ata_bio->flags & ATA_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT;
} else {
/* Wait for at last 400ns for status bit to be valid */
delay(1);
wdc_ata_bio_intr(chp, xfer, 0);
if ((ata_bio->flags & ATA_ITSDONE) == 0)
goto again;
}
return;
timeout:
printf("%s:%d:%d: not ready, st=0x%02x, err=0x%02x\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
chp->ch_status, chp->ch_error);
if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR)
ata_bio->error = TIMEOUT;
wdc_ata_bio_done(chp, xfer);
return;
}
int
wdc_ata_bio_intr(chp, xfer, irq)
struct channel_softc *chp;
struct wdc_xfer *xfer;
int irq;
{
struct ata_bio *ata_bio = xfer->cmd;
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
int drv_err;
int dma_flags = 0;
WDCDEBUG_PRINT(("wdc_ata_bio_intr %s:%d:%d\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive),
DEBUG_INTR | DEBUG_XFERS);
/* Is it not a transfer, but a control operation? */
if (drvp->state < READY) {
printf("%s:%d:%d: bad state %d in wdc_ata_bio_intr\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
drvp->state);
panic("wdc_ata_bio_intr: bad state\n");
}
if (xfer->c_flags & C_DMA) {
dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0;
dma_flags |= (ata_bio->flags & ATA_POLL) ? WDC_DMA_POLL : 0;
}
/*
* if we missed an interrupt in a PIO transfer, reset and restart.
* Don't try to continue transfer, we may have missed cycles.
*/
if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) {
ata_bio->error = TIMEOUT;
wdc_ata_bio_done(chp, xfer);
return 1;
}
/* Ack interrupt done by wait_for_unbusy */
if (wait_for_unbusy(chp,
(irq == 0) ? ATA_DELAY : 0) < 0) {
if (irq && (xfer->c_flags & C_TIMEOU) == 0)
return 0; /* IRQ was not for us */
printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip%d\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
xfer->c_bcount, xfer->c_skip);
/* if we were using DMA, turn off DMA channel */
if (xfer->c_flags & C_DMA) {
(*chp->wdc->dma_finish)(chp->wdc->dma_arg,
chp->channel, xfer->drive, dma_flags);
ata_dmaerr(drvp);
}
ata_bio->error = TIMEOUT;
wdc_ata_bio_done(chp, xfer);
return 1;
}
drv_err = wdc_ata_err(drvp, ata_bio);
/* If we were using DMA, Turn off the DMA channel and check for error */
if (xfer->c_flags & C_DMA) {
if (ata_bio->flags & ATA_POLL) {
/*
* IDE drives deassert WDCS_BSY before transfer is
* complete when using DMA. Polling for DRQ to deassert
* is not enouth DRQ is not required to be
* asserted for DMA transfers, so poll for DRDY.
*/
if (wdcwait(chp, WDCS_DRDY | WDCS_DRQ, WDCS_DRDY,
ATA_DELAY) < 0) {
printf("%s:%d:%d: polled transfer timed out "
"(st=0x%x)\n", chp->wdc->sc_dev.dv_xname,
chp->channel, xfer->drive, chp->ch_status);
ata_bio->error = TIMEOUT;
drv_err = WDC_ATA_ERR;
}
}
if ((*chp->wdc->dma_finish)(chp->wdc->dma_arg,
chp->channel, xfer->drive, dma_flags) != 0) {
if (drv_err != WDC_ATA_ERR) {
ata_bio->error = ERR_DMA;
drv_err = WDC_ATA_ERR;
}
}
if (chp->ch_status & WDCS_DRQ) {
if (drv_err != WDC_ATA_ERR) {
printf("%s:%d:%d: intr with DRQ (st=0x%x)\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive, chp->ch_status);
ata_bio->error = TIMEOUT;
drv_err = WDC_ATA_ERR;
}
}
if (drv_err != WDC_ATA_ERR)
goto end;
ata_dmaerr(drvp);
}
/* if we had an error, end */
if (drv_err == WDC_ATA_ERR) {
wdc_ata_bio_done(chp, xfer);
return 1;
}
/* If this was a read and not using DMA, fetch the data. */
if ((ata_bio->flags & ATA_READ) != 0) {
if ((chp->ch_status & WDCS_DRQ) != WDCS_DRQ) {
printf("%s:%d:%d: read intr before drq\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive);
ata_bio->error = TIMEOUT;
wdc_ata_bio_done(chp, xfer);
return 1;
}
if ((chp->wdc->cap & WDC_CAPABILITY_ATA_NOSTREAM)) {
if (drvp->drive_flags & DRIVE_CAP32) {
bus_space_read_multi_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 2);
} else {
bus_space_read_multi_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 1);
}
} else {
if (drvp->drive_flags & DRIVE_CAP32) {
bus_space_read_multi_stream_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 2);
} else {
bus_space_read_multi_stream_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
ata_bio->nbytes >> 1);
}
}
}
end:
ata_bio->blkno += ata_bio->nblks;
ata_bio->blkdone += ata_bio->nblks;
xfer->c_skip += ata_bio->nbytes;
xfer->c_bcount -= ata_bio->nbytes;
/* See if this transfer is complete. */
if (xfer->c_bcount > 0) {
if ((ata_bio->flags & ATA_POLL) == 0) {
/* Start the next operation */
_wdc_ata_bio_start(chp, xfer);
} else {
/* Let _wdc_ata_bio_start do the loop */
return 1;
}
} else { /* Done with this transfer */
ata_bio->error = NOERROR;
wdc_ata_bio_done(chp, xfer);
}
return 1;
}
void
wdc_ata_kill_pending(drvp)
struct ata_drive_datas *drvp;
{
struct channel_softc *chp = drvp->chnl_softc;
wdc_kill_pending(chp);
}
void
wdc_ata_bio_kill_xfer(chp, xfer)
struct channel_softc *chp;
struct wdc_xfer *xfer;
{
struct ata_bio *ata_bio = xfer->cmd;
int drive = xfer->drive;
untimeout(wdctimeout, chp);
/* remove this command from xfer queue */
wdc_free_xfer(chp, xfer);
ata_bio->flags |= ATA_ITSDONE;
ata_bio->error = ERR_NODEV;
ata_bio->r_error = WDCE_ABRT;
if ((ata_bio->flags & ATA_POLL) == 0) {
WDCDEBUG_PRINT(("wdc_ata_done: wddone\n"), DEBUG_XFERS);
wddone(chp->ch_drive[drive].drv_softc);
}
}
void
wdc_ata_bio_done(chp, xfer)
struct channel_softc *chp;
struct wdc_xfer *xfer;
{
struct ata_bio *ata_bio = xfer->cmd;
int drive = xfer->drive;
WDCDEBUG_PRINT(("wdc_ata_bio_done %s:%d:%d: flags 0x%x\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
(u_int)xfer->c_flags),
DEBUG_XFERS);
untimeout(wdctimeout, chp);
/* feed back residual bcount to our caller */
ata_bio->bcount = xfer->c_bcount;
/* remove this command from xfer queue */
wdc_free_xfer(chp, xfer);
ata_bio->flags |= ATA_ITSDONE;
if ((ata_bio->flags & ATA_POLL) == 0) {
WDCDEBUG_PRINT(("wdc_ata_done: wddone\n"), DEBUG_XFERS);
wddone(chp->ch_drive[drive].drv_softc);
}
WDCDEBUG_PRINT(("wdcstart from wdc_ata_done, flags 0x%x\n",
chp->ch_flags), DEBUG_XFERS);
wdcstart(chp);
}
/*
* Implement operations needed before read/write.
*/
int
wdc_ata_ctrl_intr(chp, xfer, irq)
struct channel_softc *chp;
struct wdc_xfer *xfer;
int irq;
{
struct ata_bio *ata_bio = xfer->cmd;
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
char *errstring = NULL;
int delay = (irq == 0) ? ATA_DELAY : 0;
WDCDEBUG_PRINT(("wdc_ata_ctrl_intr: state %d\n", drvp->state),
DEBUG_FUNCS);
again:
switch (drvp->state) {
case RECAL: /* Should not be in this state here */
panic("wdc_ata_ctrl_intr: state==RECAL");
break;
case RECAL_WAIT:
errstring = "recal";
if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay))
goto timeout;
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* fall through */
case PIOMODE:
/* Don't try to set modes if controller can't be adjusted */
if ((chp->wdc->cap & WDC_CAPABILITY_MODE) == 0)
goto geometry;
/* Also don't try if the drive didn't report its mode */
if ((drvp->drive_flags & DRIVE_MODE) == 0)
goto geometry;
wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0,
0x08 | drvp->PIO_mode, WDSF_SET_MODE);
drvp->state = PIOMODE_WAIT;
break;
case PIOMODE_WAIT:
errstring = "piomode";
if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay))
goto timeout;
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* fall through */
case DMAMODE:
if (drvp->drive_flags & DRIVE_UDMA) {
wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0,
0x40 | drvp->UDMA_mode, WDSF_SET_MODE);
} else if (drvp->drive_flags & DRIVE_DMA) {
wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0,
0x20 | drvp->DMA_mode, WDSF_SET_MODE);
} else {
goto geometry;
}
drvp->state = DMAMODE_WAIT;
break;
case DMAMODE_WAIT:
errstring = "dmamode";
if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay))
goto timeout;
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* fall through */
case GEOMETRY:
geometry:
if (ata_bio->flags & ATA_LBA)
goto multimode;
wdccommand(chp, xfer->drive, WDCC_IDP,
ata_bio->lp->d_ncylinders,
ata_bio->lp->d_ntracks - 1, 0, ata_bio->lp->d_nsectors,
(ata_bio->lp->d_type == DTYPE_ST506) ?
ata_bio->lp->d_precompcyl / 4 : 0);
drvp->state = GEOMETRY_WAIT;
break;
case GEOMETRY_WAIT:
errstring = "geometry";
if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay))
goto timeout;
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* fall through */
case MULTIMODE:
multimode:
if (ata_bio->multi == 1)
goto ready;
wdccommand(chp, xfer->drive, WDCC_SETMULTI, 0, 0, 0,
ata_bio->multi, 0);
drvp->state = MULTIMODE_WAIT;
break;
case MULTIMODE_WAIT:
errstring = "setmulti";
if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay))
goto timeout;
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* fall through */
case READY:
ready:
drvp->state = READY;
/*
* The drive is usable now
*/
xfer->c_intr = wdc_ata_bio_intr;
_wdc_ata_bio_start(chp, xfer);
return 1;
}
if ((ata_bio->flags & ATA_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT;
} else {
goto again;
}
return 1;
timeout:
if (irq && (xfer->c_flags & C_TIMEOU) == 0) {
return 0; /* IRQ was not for us */
}
printf("%s:%d:%d: %s timed out\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, errstring);
ata_bio->error = TIMEOUT;
drvp->state = 0;
wdc_ata_bio_done(chp, xfer);
return 0;
error:
printf("%s:%d:%d: %s ",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
errstring);
if (chp->ch_status & WDCS_DWF) {
printf("drive fault\n");
ata_bio->error = ERR_DF;
} else {
printf("error (%x)\n", chp->ch_error);
ata_bio->r_error = chp->ch_error;
ata_bio->error = ERROR;
}
drvp->state = 0;
wdc_ata_bio_done(chp, xfer);
return 1;
}
int
wdc_ata_err(drvp, ata_bio)
struct ata_drive_datas *drvp;
struct ata_bio *ata_bio;
{
struct channel_softc *chp = drvp->chnl_softc;
ata_bio->error = 0;
if (chp->ch_status & WDCS_BSY) {
ata_bio->error = TIMEOUT;
return WDC_ATA_ERR;
}
if (chp->ch_status & WDCS_DWF) {
ata_bio->error = ERR_DF;
return WDC_ATA_ERR;
}
if (chp->ch_status & WDCS_ERR) {
ata_bio->error = ERROR;
ata_bio->r_error = chp->ch_error;
if (drvp->drive_flags & DRIVE_UDMA &&
(ata_bio->r_error & WDCE_CRC)) {
/*
* Record the CRC error, to avoid downgrading to
* multiword DMA
*/
drvp->drive_flags |= DRIVE_DMAERR;
}
if (ata_bio->r_error & (WDCE_BBK | WDCE_UNC | WDCE_IDNF |
WDCE_ABRT | WDCE_TK0NF | WDCE_AMNF))
return WDC_ATA_ERR;
return WDC_ATA_NOERR;
}
if (chp->ch_status & WDCS_CORR)
ata_bio->flags |= ATA_CORR;
return WDC_ATA_NOERR;
}
int
wdc_ata_addref(drvp)
struct ata_drive_datas *drvp;
{
struct channel_softc *chp = drvp->chnl_softc;
return (wdc_addref(chp));
}
void
wdc_ata_delref(drvp)
struct ata_drive_datas *drvp;
{
struct channel_softc *chp = drvp->chnl_softc;
wdc_delref(chp);
}
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