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src/sys/dev/ata/ata_wdc.c

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/* $OpenBSD: ata_wdc.c,v 1.52 2018/11/02 09:59:36 fcambus Exp $ */
/* $NetBSD: ata_wdc.c,v 1.21 1999/08/09 09:43:11 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001 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.
*
* 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, 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.
*
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/syslog.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcreg.h>
#include <dev/ic/wdcvar.h>
#include <dev/ata/wdvar.h>
#ifdef HIBERNATE
#include <sys/hibernate.h>
#endif
#define DEBUG_INTR 0x01
#define DEBUG_XFERS 0x02
#define DEBUG_STATUS 0x04
#define DEBUG_FUNCS 0x08
#define DEBUG_PROBE 0x10
#ifdef WDCDEBUG
#ifndef WDCDEBUG_WD_MASK
#define WDCDEBUG_WD_MASK 0x00
#endif
int wdcdebug_wd_mask = WDCDEBUG_WD_MASK;
#define WDCDEBUG_PRINT(args, level) do { \
if ((wdcdebug_wd_mask & (level)) != 0) \
printf args; \
} while (0)
#else
#define WDCDEBUG_PRINT(args, level)
#endif
#define ATA_DELAY 45000 /* 45s for a drive I/O */
void wdc_ata_bio_start(struct channel_softc *, struct wdc_xfer *);
void _wdc_ata_bio_start(struct channel_softc *, struct wdc_xfer *);
int wdc_ata_bio_intr(struct channel_softc *, struct wdc_xfer *, int);
void wdc_ata_bio_kill_xfer(struct channel_softc *, struct wdc_xfer *);
void wdc_ata_bio_done(struct channel_softc *, struct wdc_xfer *);
int wdc_ata_ctrl_intr(struct channel_softc *, struct wdc_xfer *, int);
int wdc_ata_err(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 */
#ifdef HIBERNATE
int
wd_hibernate_io(dev_t dev, daddr_t blkno, vaddr_t addr, size_t size, int op, void *page)
{
struct {
struct wd_softc wd;
struct wdc_xfer xfer;
struct channel_softc chp;
daddr_t poffset;
size_t psize;
} *my = page;
struct wd_softc *real_wd, *wd = &my->wd;
struct wdc_xfer *xfer = &my->xfer;
struct channel_softc *chp = &my->chp;
struct ata_bio *ata_bio;
extern struct cfdriver wd_cd;
/* early call for initialization */
if (op == HIB_INIT) {
my->poffset = blkno;
my->psize = size;
return(0);
}
real_wd = (struct wd_softc *)disk_lookup(&wd_cd, DISKUNIT(dev));
if (real_wd == NULL)
return (ENODEV);
if (op == HIB_DONE) {
struct wdc_softc *wdc = chp->wdc;
config_suspend(&wdc->sc_dev, DVACT_RESUME);
return (0);
}
if (blkno > my->psize)
return (E2BIG);
blkno += my->poffset;
/*
* Craft a fake set of softc and related structures
* which we think the driver modifies. Some of these will
* have pointers which reach to unsafe places, but..
*/
bcopy(real_wd->drvp->chnl_softc, &my->chp, sizeof my->chp);
chp->ch_drive[0].chnl_softc = chp;
chp->ch_drive[1].chnl_softc = chp;
bcopy(real_wd, &my->wd, sizeof my->wd);
ata_bio = &wd->sc_wdc_bio;
ata_bio->wd = wd; /* fixup ata_bio->wd */
wd->drvp = &chp->ch_drive[real_wd->drvp->drive];
/* Fill the request and submit it */
wd->sc_wdc_bio.blkno = blkno;
wd->sc_wdc_bio.flags = ATA_POLL | ATA_LBA48;
if (op == HIB_R)
wd->sc_wdc_bio.flags |= ATA_READ;
wd->sc_wdc_bio.bcount = size;
wd->sc_wdc_bio.databuf = (caddr_t)addr;
wd->sc_wdc_bio.wd = wd;
bzero(&my->xfer, sizeof my->xfer);
xfer->c_flags |= C_PRIVATEXFER; /* Our xfer is totally private */
xfer->c_flags |= C_POLL;
xfer->drive = wd->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) ? 0 : EIO;
}
#endif /* HIBERNATE */
/*
* Handle block I/O operation. Return WDC_COMPLETE, WDC_QUEUED, or
* WDC_TRY_AGAIN. Must be called at splbio().
*/
int
wdc_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 (!(ata_bio->flags & ATA_POLL) &&
(drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) &&
(ata_bio->flags & ATA_SINGLE) == 0 &&
(ata_bio->bcount > 512 ||
(chp->wdc->quirks & WDC_QUIRK_NOSHORTDMA) == 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(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_add_msec(&chp->ch_timo, ATA_DELAY);
_wdc_ata_bio_start(chp, xfer);
}
void
_wdc_ata_bio_start(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 error, 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;
wdc_set_drive(chp, xfer->drive);
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;
if (ata_bio->flags & ATA_LBA48)
dma_flags |= WDC_DMA_LBA48;
}
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;
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;
if (ata_bio->flags & ATA_LBA48)
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READDMA_EXT : WDCC_WRITEDMA_EXT;
else
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READDMA : WDCC_WRITEDMA;
/* Init the DMA channel. */
error = (*chp->wdc->dma_init)(chp->wdc->dma_arg,
chp->channel, xfer->drive,
(char *)xfer->databuf + xfer->c_skip,
ata_bio->nbytes, dma_flags);
if (error) {
if (error == EINVAL) {
/*
* We can't do DMA on this transfer
* for some reason. Fall back to
* PIO.
*/
xfer->c_flags &= ~C_DMA;
error = 0;
goto do_pio;
}
ata_bio->error = ERR_DMA;
ata_bio->r_error = 0;
wdc_ata_bio_done(chp, xfer);
return;
}
/* Initiate command */
wdc_set_drive(chp, xfer->drive);
if (wait_for_ready(chp, ATA_DELAY) < 0)
goto timeout;
/* start the DMA channel (before) */
if (chp->ch_flags & WDCF_DMA_BEFORE_CMD)
(*chp->wdc->dma_start)(chp->wdc->dma_arg,
chp->channel, xfer->drive);
if (ata_bio->flags & ATA_LBA48) {
wdccommandext(chp, xfer->drive, cmd,
(u_int64_t)ata_bio->blkno, nblks);
} else {
wdccommand(chp, xfer->drive, cmd, cyl,
head, sect, nblks, 0);
}
/* start the DMA channel (after) */
if ((chp->ch_flags & WDCF_DMA_BEFORE_CMD) == 0)
(*chp->wdc->dma_start)(chp->wdc->dma_arg,
chp->channel, xfer->drive);
chp->ch_flags |= WDCF_DMA_WAIT;
/* wait for irq */
goto intr;
} /* else not DMA */
do_pio:
ata_bio->nblks = min(nblks, ata_bio->multi);
ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize;
KASSERT(nblks == 1 || (ata_bio->flags & ATA_SINGLE) == 0);
if (ata_bio->nblks > 1) {
if (ata_bio->flags & ATA_LBA48)
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READMULTI_EXT : WDCC_WRITEMULTI_EXT;
else
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READMULTI : WDCC_WRITEMULTI;
} else {
if (ata_bio->flags & ATA_LBA48)
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READ_EXT : WDCC_WRITE_EXT;
else
cmd = (ata_bio->flags & ATA_READ) ?
WDCC_READ : WDCC_WRITE;
}
/* Initiate command! */
wdc_set_drive(chp, xfer->drive);
if (wait_for_ready(chp, ATA_DELAY) < 0)
goto timeout;
if (ata_bio->flags & ATA_LBA48) {
wdccommandext(chp, xfer->drive, cmd,
(u_int64_t)ata_bio->blkno, nblks);
} else {
wdccommand(chp, xfer->drive, cmd, cyl,
head, sect, nblks, 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%b, err=0x%02x\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive, chp->ch_status, WDCS_BITS,
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;
}
wdc_output_bytes(drvp, (char *)xfer->databuf + xfer->c_skip,
ata_bio->nbytes);
}
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);
if (chp->ch_flags & WDCF_DMA_WAIT) {
wdc_dmawait(chp, xfer, ATA_DELAY);
chp->ch_flags &= ~WDCF_DMA_WAIT;
}
wdc_ata_bio_intr(chp, xfer, 0);
if ((ata_bio->flags & ATA_ITSDONE) == 0)
goto again;
}
return;
timeout:
if (chp->ch_status == 0xff)
return;
printf("%s:%d:%d: not ready, st=0x%b, err=0x%02x\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
chp->ch_status, WDCS_BITS, 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(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;
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");
}
/*
* reset on timeout. This will cause extra resets in the case
* of occasional lost interrupts
*/
if (xfer->c_flags & C_TIMEOU)
goto timeout;
/* Ack interrupt done by wait_for_unbusy */
if (wait_for_unbusy(chp,
(irq == 0) ? ATA_DELAY : 0) < 0) {
if (irq)
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);
goto timeout;
}
if (chp->wdc->cap & WDC_CAPABILITY_IRQACK)
chp->wdc->irqack(chp);
drv_err = wdc_ata_err(drvp, ata_bio);
if (xfer->c_flags & C_DMA) {
if (chp->wdc->dma_status != 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%b)\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive, chp->ch_status, WDCS_BITS);
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;
}
wdc_input_bytes(drvp, (char *)xfer->databuf + xfer->c_skip,
ata_bio->nbytes);
}
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;
timeout:
if (xfer->c_flags & C_DMA)
ata_dmaerr(drvp);
ata_bio->error = TIMEOUT;
wdc_ata_bio_done(chp, xfer);
return 1;
}
void
wdc_ata_bio_kill_xfer(struct channel_softc *chp, struct wdc_xfer *xfer)
{
struct ata_bio *ata_bio = xfer->cmd;
timeout_del(&chp->ch_timo);
/* 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(ata_bio->wd);
}
}
void
wdc_ata_bio_done(struct channel_softc *chp, struct wdc_xfer *xfer)
{
struct ata_bio *ata_bio = xfer->cmd;
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);
if ((xfer->c_flags & C_PRIVATEXFER) == 0)
timeout_del(&chp->ch_timo);
/* 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(ata_bio->wd);
}
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(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->wdc->cap & WDC_CAPABILITY_IRQACK)
chp->wdc->irqack(chp);
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* FALLTHROUGH */
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;
/* SET FEATURES 0x08 is only for PIO mode > 2 */
if (drvp->PIO_mode <= 2)
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->wdc->cap & WDC_CAPABILITY_IRQACK)
chp->wdc->irqack(chp);
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* FALLTHROUGH */
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->wdc->cap & WDC_CAPABILITY_IRQACK)
chp->wdc->irqack(chp);
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* FALLTHROUGH */
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, 0);
drvp->state = GEOMETRY_WAIT;
break;
case GEOMETRY_WAIT:
errstring = "geometry";
if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay))
goto timeout;
if (chp->wdc->cap & WDC_CAPABILITY_IRQACK)
chp->wdc->irqack(chp);
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* FALLTHROUGH */
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->wdc->cap & WDC_CAPABILITY_IRQACK)
chp->wdc->irqack(chp);
if (chp->ch_status & (WDCS_ERR | WDCS_DWF))
goto error;
/* FALLTHROUGH */
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(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 == 0xff) {
ata_bio->error = ERR_NODEV;
return WDC_ATA_ERR;
}
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;
}
#if 0
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);
}
#endif
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