freebsd-skq/sys/dev/ata/ata-disk.c
sos 2bbd43c8f1 Add new support for locking an ATA channel and use that throughout
the ATA/ATAPI driver. This solves the concurrency problem with
the new GEOM code, and also cuts a good deal of the patch size
in the upcoming MFC.
2002-03-11 21:04:32 +00:00

962 lines
29 KiB
C

/*-
* Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
* 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,
* without modification, immediately at the beginning of the file.
* 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 ``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.
*
* $FreeBSD$
*/
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ata.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <sys/devicestat.h>
#include <sys/cons.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-disk.h>
#include <dev/ata/ata-raid.h>
/* device structures */
static d_open_t adopen;
static d_close_t adclose;
static d_strategy_t adstrategy;
static d_dump_t addump;
static struct cdevsw ad_cdevsw = {
/* open */ adopen,
/* close */ adclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ noioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ adstrategy,
/* name */ "ad",
/* maj */ 116,
/* dump */ addump,
/* psize */ nopsize,
/* flags */ D_DISK,
};
static struct cdevsw addisk_cdevsw;
/* prototypes */
static void ad_invalidatequeue(struct ad_softc *, struct ad_request *);
static int ad_tagsupported(struct ad_softc *);
static void ad_timeout(struct ad_request *);
static void ad_free(struct ad_request *);
static int ad_version(u_int16_t);
/* misc defines */
#define AD_MAX_RETRIES 3
/* internal vars */
static u_int32_t adp_lun_map = 0;
static int ata_dma = 1;
static int ata_wc = 1;
static int ata_tags = 0;
TUNABLE_INT("hw.ata.ata_dma", &ata_dma);
TUNABLE_INT("hw.ata.wc", &ata_wc);
TUNABLE_INT("hw.ata.tags", &ata_tags);
static MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
/* sysctl vars */
SYSCTL_DECL(_hw_ata);
SYSCTL_INT(_hw_ata, OID_AUTO, ata_dma, CTLFLAG_RD, &ata_dma, 0,
"ATA disk DMA mode control");
SYSCTL_INT(_hw_ata, OID_AUTO, wc, CTLFLAG_RD, &ata_wc, 0,
"ATA disk write caching");
SYSCTL_INT(_hw_ata, OID_AUTO, tags, CTLFLAG_RD, &ata_tags, 0,
"ATA disk tagged queuing support");
void
ad_attach(struct ata_device *atadev)
{
struct ad_softc *adp;
dev_t dev;
if (!(adp = malloc(sizeof(struct ad_softc), M_AD, M_NOWAIT | M_ZERO))) {
ata_prtdev(atadev, "failed to allocate driver storage\n");
return;
}
adp->device = atadev;
#ifdef ATA_STATIC_ID
adp->lun = (device_get_unit(atadev->channel->dev)<<1)+ATA_DEV(atadev->unit);
#else
adp->lun = ata_get_lun(&adp_lun_map);
#endif
ata_set_name(atadev, "ad", adp->lun);
adp->heads = atadev->param->heads;
adp->sectors = atadev->param->sectors;
adp->total_secs = atadev->param->cylinders * adp->heads * adp->sectors;
bioq_init(&adp->queue);
/* does this device need oldstyle CHS addressing */
if (!ad_version(atadev->param->version_major) ||
!(atadev->param->atavalid & ATA_FLAG_54_58) || !atadev->param->lba_size)
adp->flags |= AD_F_CHS_USED;
/* use the 28bit LBA size if valid */
if (atadev->param->cylinders == 16383 &&
adp->total_secs < atadev->param->lba_size)
adp->total_secs = atadev->param->lba_size;
/* use the 48bit LBA size if valid */
if (atadev->param->support.address48 &&
atadev->param->lba_size48 > 268435455)
adp->total_secs = atadev->param->lba_size48;
ATA_SLEEPLOCK_CH(atadev->channel, ATA_CONTROL);
/* use multiple sectors/interrupt if device supports it */
adp->transfersize = DEV_BSIZE;
if (ad_version(atadev->param->version_major)) {
int secsperint = max(1, min(atadev->param->sectors_intr, 16));
if (!ata_command(atadev, ATA_C_SET_MULTI, 0, secsperint,
0, ATA_WAIT_INTR) && !ata_wait(atadev, 0))
adp->transfersize *= secsperint;
}
/* enable read caching if not default on device */
if (ata_command(atadev, ATA_C_SETFEATURES,
0, 0, ATA_C_F_ENAB_RCACHE, ATA_WAIT_INTR))
ata_prtdev(atadev, "enabling readahead cache failed\n");
/* enable write caching if allowed and not default on device */
if (ata_wc || (ata_tags && ad_tagsupported(adp))) {
if (ata_command(atadev, ATA_C_SETFEATURES,
0, 0, ATA_C_F_ENAB_WCACHE, ATA_WAIT_INTR))
ata_prtdev(atadev, "enabling write cache failed\n");
}
else {
if (ata_command(atadev, ATA_C_SETFEATURES,
0, 0, ATA_C_F_DIS_WCACHE, ATA_WAIT_INTR))
ata_prtdev(atadev, "disabling write cache failed\n");
}
/* use DMA if allowed and if drive/controller supports it */
if (ata_dma)
ata_dmainit(atadev->channel, atadev->unit, ata_pmode(atadev->param),
ata_wmode(atadev->param), ata_umode(atadev->param));
else
ata_dmainit(atadev->channel, atadev->unit,
ata_pmode(atadev->param), -1, -1);
/* use tagged queueing if allowed and supported */
if (ata_tags && ad_tagsupported(adp)) {
adp->num_tags = atadev->param->queuelen;
adp->flags |= AD_F_TAG_ENABLED;
adp->device->channel->flags |= ATA_QUEUED;
if (ata_command(atadev, ATA_C_SETFEATURES,
0, 0, ATA_C_F_DIS_RELIRQ, ATA_WAIT_INTR))
ata_prtdev(atadev, "disabling release interrupt failed\n");
if (ata_command(atadev, ATA_C_SETFEATURES,
0, 0, ATA_C_F_DIS_SRVIRQ, ATA_WAIT_INTR))
ata_prtdev(atadev, "disabling service interrupt failed\n");
}
ATA_UNLOCK_CH(atadev->channel);
devstat_add_entry(&adp->stats, "ad", adp->lun, DEV_BSIZE,
DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
DEVSTAT_PRIORITY_DISK);
dev = disk_create(adp->lun, &adp->disk, 0, &ad_cdevsw, &addisk_cdevsw);
dev->si_drv1 = adp;
dev->si_iosize_max = 256 * DEV_BSIZE;
adp->dev = dev;
/* construct the disklabel */
bzero(&adp->disk.d_label, sizeof(struct disklabel));
adp->disk.d_label.d_secsize = DEV_BSIZE;
adp->disk.d_label.d_nsectors = adp->sectors;
adp->disk.d_label.d_ntracks = adp->heads;
adp->disk.d_label.d_ncylinders = adp->total_secs/(adp->heads*adp->sectors);
adp->disk.d_label.d_secpercyl = adp->sectors * adp->heads;
adp->disk.d_label.d_secperunit = adp->total_secs;
atadev->driver = adp;
atadev->flags = 0;
/* if this disk belongs to an ATA RAID dont print the probe */
if (ata_raiddisk_attach(adp))
adp->flags |= AD_F_RAID_SUBDISK;
else
ad_print(adp);
}
void
ad_detach(struct ata_device *atadev, int flush) /* get rid of flush XXX SOS */
{
struct ad_softc *adp = atadev->driver;
struct ad_request *request;
struct bio *bp;
atadev->flags |= ATA_D_DETACHING;
ata_prtdev(atadev, "removed from configuration\n");
ad_invalidatequeue(adp, NULL);
TAILQ_FOREACH(request, &atadev->channel->ata_queue, chain) {
if (request->softc != adp)
continue;
TAILQ_REMOVE(&atadev->channel->ata_queue, request, chain);
biofinish(request->bp, NULL, ENXIO);
ad_free(request);
}
while ((bp = bioq_first(&adp->queue))) {
bioq_remove(&adp->queue, bp);
biofinish(bp, NULL, ENXIO);
}
disk_invalidate(&adp->disk);
disk_destroy(adp->dev);
devstat_remove_entry(&adp->stats);
if (flush) {
if (ata_command(atadev, ATA_C_FLUSHCACHE, 0, 0, 0, ATA_WAIT_READY))
ata_prtdev(atadev, "flushing cache on detach failed\n");
}
if (adp->flags & AD_F_RAID_SUBDISK)
ata_raiddisk_detach(adp);
ata_free_name(atadev);
ata_free_lun(&adp_lun_map, adp->lun);
atadev->driver = NULL;
atadev->flags = 0;
free(adp, M_AD);
}
static int
adopen(dev_t dev, int flags, int fmt, struct thread *td)
{
struct ad_softc *adp = dev->si_drv1;
if (adp->flags & AD_F_RAID_SUBDISK)
return EBUSY;
return 0;
}
static int
adclose(dev_t dev, int flags, int fmt, struct thread *td)
{
struct ad_softc *adp = dev->si_drv1;
ATA_SLEEPLOCK_CH(adp->device->channel, ATA_CONTROL);
if (ata_command(adp->device, ATA_C_FLUSHCACHE, 0, 0, 0, ATA_WAIT_READY))
ata_prtdev(adp->device, "flushing cache on close failed\n");
ATA_UNLOCK_CH(adp->device->channel);
return 0;
}
static void
adstrategy(struct bio *bp)
{
struct ad_softc *adp = bp->bio_dev->si_drv1;
int s;
if (adp->device->flags & ATA_D_DETACHING) {
biofinish(bp, NULL, ENXIO);
return;
}
s = splbio();
bioqdisksort(&adp->queue, bp);
splx(s);
ata_start(adp->device->channel);
}
int
addump(dev_t dev)
{
struct ad_softc *adp = dev->si_drv1;
struct ad_request request;
u_int count, blkno, secsize;
vm_offset_t addr = 0;
long blkcnt;
int dumppages = MAXDUMPPGS;
int error;
int i;
if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize)))
return error;
if (!adp)
return ENXIO;
/* force PIO mode for dumps */
adp->device->mode = ATA_PIO;
ata_reinit(adp->device->channel);
blkcnt = howmany(PAGE_SIZE, secsize);
while (count > 0) {
caddr_t va = NULL;
DELAY(1000);
if ((count / blkcnt) < dumppages)
dumppages = count / blkcnt;
for (i = 0; i < dumppages; ++i) {
vm_offset_t a = addr + (i * PAGE_SIZE);
if (is_physical_memory(a))
va = pmap_kenter_temporary(trunc_page(a), i);
else
va = pmap_kenter_temporary(trunc_page(0), i);
}
bzero(&request, sizeof(struct ad_request));
request.softc = adp;
request.blockaddr = blkno;
request.bytecount = PAGE_SIZE * dumppages;
request.data = va;
while (request.bytecount > 0) {
ad_transfer(&request);
if (request.flags & ADR_F_ERROR)
return EIO;
request.donecount += request.currentsize;
request.bytecount -= request.currentsize;
DELAY(20);
}
if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0)
return EINTR;
blkno += blkcnt * dumppages;
count -= blkcnt * dumppages;
addr += PAGE_SIZE * dumppages;
}
if (ata_wait(adp->device, ATA_S_READY | ATA_S_DSC) < 0)
ata_prtdev(adp->device, "timeout waiting for final ready\n");
return 0;
}
void
ad_start(struct ata_device *atadev)
{
struct ad_softc *adp = atadev->driver;
struct bio *bp = bioq_first(&adp->queue);
struct ad_request *request;
int tag = 0;
if (!bp)
return;
/* if tagged queueing enabled get next free tag */
if (adp->flags & AD_F_TAG_ENABLED) {
while (tag <= adp->num_tags && adp->tags[tag])
tag++;
if (tag > adp->num_tags )
return;
}
if (!(request = malloc(sizeof(struct ad_request), M_AD, M_NOWAIT|M_ZERO))) {
ata_prtdev(atadev, "out of memory in start\n");
return;
}
/* setup request */
request->softc = adp;
request->bp = bp;
request->blockaddr = bp->bio_pblkno;
request->bytecount = bp->bio_bcount;
request->data = bp->bio_data;
request->tag = tag;
if (bp->bio_cmd == BIO_READ)
request->flags |= ADR_F_READ;
if (adp->device->mode >= ATA_DMA) {
if (!(request->dmatab = ata_dmaalloc(atadev->channel, atadev->unit)))
adp->device->mode = ATA_PIO;
}
/* insert in tag array */
adp->tags[tag] = request;
/* remove from drive queue */
bioq_remove(&adp->queue, bp);
/* link onto controller queue */
TAILQ_INSERT_TAIL(&atadev->channel->ata_queue, request, chain);
}
int
ad_transfer(struct ad_request *request)
{
struct ad_softc *adp;
u_int64_t lba;
u_int32_t count, max_count;
u_int8_t cmd;
int flags = ATA_IMMEDIATE;
/* get request params */
adp = request->softc;
/* calculate transfer details */
lba = request->blockaddr + (request->donecount / DEV_BSIZE);
if (request->donecount == 0) {
/* start timeout for this transfer */
if (dumping)
request->timeout_handle.callout = NULL;
else
request->timeout_handle =
timeout((timeout_t*)ad_timeout, request, 10 * hz);
/* setup transfer parameters */
count = howmany(request->bytecount, DEV_BSIZE);
max_count = adp->device->param->support.address48 ? 65536 : 256;
if (count > max_count) {
ata_prtdev(adp->device,
"count %d size transfers not supported\n", count);
count = max_count;
}
if (adp->flags & AD_F_CHS_USED) {
int sector = (lba % adp->sectors) + 1;
int cylinder = lba / (adp->sectors * adp->heads);
int head = (lba % (adp->sectors * adp->heads)) / adp->sectors;
lba = (sector&0xff) | ((cylinder&0xffff)<<8) | ((head&0xf)<<24);
adp->device->flags |= ATA_D_USE_CHS;
}
/* setup first transfer length */
request->currentsize = min(request->bytecount, adp->transfersize);
devstat_start_transaction(&adp->stats);
/* does this drive & transfer work with DMA ? */
request->flags &= ~ADR_F_DMA_USED;
if (adp->device->mode >= ATA_DMA &&
!ata_dmasetup(adp->device->channel, adp->device->unit,
request->dmatab, request->data, request->bytecount)) {
request->flags |= ADR_F_DMA_USED;
request->currentsize = request->bytecount;
/* do we have tags enabled ? */
if (adp->flags & AD_F_TAG_ENABLED) {
cmd = (request->flags & ADR_F_READ) ?
ATA_C_READ_DMA_QUEUED : ATA_C_WRITE_DMA_QUEUED;
if (ata_command(adp->device, cmd, lba,
request->tag << 3, count, flags)) {
ata_prtdev(adp->device, "error executing command");
goto transfer_failed;
}
if (ata_wait(adp->device, ATA_S_READY)) {
ata_prtdev(adp->device, "timeout waiting for READY\n");
goto transfer_failed;
}
adp->outstanding++;
/* if ATA bus RELEASE check for SERVICE */
if (adp->flags & AD_F_TAG_ENABLED &&
ATA_INB(adp->device->channel->r_io, ATA_IREASON) &
ATA_I_RELEASE)
return ad_service(adp, 1);
}
else {
cmd = (request->flags & ADR_F_READ) ?
ATA_C_READ_DMA : ATA_C_WRITE_DMA;
if (ata_command(adp->device, cmd, lba, count, 0, flags)) {
ata_prtdev(adp->device, "error executing command");
goto transfer_failed;
}
#if 0
/*
* wait for data transfer phase
*
* well this should be here acording to specs, but older
* promise controllers doesn't like it, they lockup!
*/
if (ata_wait(adp->device, ATA_S_READY | ATA_S_DRQ)) {
ata_prtdev(adp->device, "timeout waiting for data phase\n");
goto transfer_failed;
}
#endif
}
/* start transfer, return and wait for interrupt */
ata_dmastart(adp->device->channel, adp->device->unit,
request->dmatab, request->flags & ADR_F_READ);
return ATA_OP_CONTINUES;
}
/* does this drive support multi sector transfers ? */
if (request->currentsize > DEV_BSIZE)
cmd = request->flags&ADR_F_READ ? ATA_C_READ_MUL : ATA_C_WRITE_MUL;
/* just plain old single sector transfer */
else
cmd = request->flags&ADR_F_READ ? ATA_C_READ : ATA_C_WRITE;
if (ata_command(adp->device, cmd, lba, count, 0, flags)){
ata_prtdev(adp->device, "error executing command");
goto transfer_failed;
}
}
/* calculate this transfer length */
request->currentsize = min(request->bytecount, adp->transfersize);
/* if this is a PIO read operation, return and wait for interrupt */
if (request->flags & ADR_F_READ)
return ATA_OP_CONTINUES;
/* ready to write PIO data ? */
if (ata_wait(adp->device, (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
ata_prtdev(adp->device, "timeout waiting for DRQ");
goto transfer_failed;
}
/* output the data */
if (adp->device->channel->flags & ATA_USE_16BIT)
ATA_OUTSW(adp->device->channel->r_io, ATA_DATA,
(void *)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int16_t));
else
ATA_OUTSL(adp->device->channel->r_io, ATA_DATA,
(void *)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int32_t));
return ATA_OP_CONTINUES;
transfer_failed:
untimeout((timeout_t *)ad_timeout, request, request->timeout_handle);
ad_invalidatequeue(adp, request);
printf(" - resetting\n");
/* if retries still permit, reinject this request */
if (request->retries++ < AD_MAX_RETRIES)
TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
else {
/* retries all used up, return error */
request->bp->bio_error = EIO;
request->bp->bio_flags |= BIO_ERROR;
request->bp->bio_resid = request->bytecount;
biofinish(request->bp, &adp->stats, 0);
ad_free(request);
}
ata_reinit(adp->device->channel);
return ATA_OP_CONTINUES;
}
int
ad_interrupt(struct ad_request *request)
{
struct ad_softc *adp = request->softc;
int dma_stat = 0;
/* finish DMA transfer */
if (request->flags & ADR_F_DMA_USED)
dma_stat = ata_dmadone(adp->device->channel);
/* do we have a corrected soft error ? */
if (adp->device->channel->status & ATA_S_CORR)
diskerr(request->bp, "soft error (ECC corrected)",
request->blockaddr + (request->donecount / DEV_BSIZE),
&adp->disk.d_label);
/* did any real errors happen ? */
if ((adp->device->channel->status & ATA_S_ERROR) ||
(request->flags & ADR_F_DMA_USED && dma_stat & ATA_BMSTAT_ERROR)) {
adp->device->channel->error =
ATA_INB(adp->device->channel->r_io, ATA_ERROR);
diskerr(request->bp, (adp->device->channel->error & ATA_E_ICRC) ?
"UDMA ICRC error" : "hard error",
request->blockaddr + (request->donecount / DEV_BSIZE),
&adp->disk.d_label);
/* if this is a UDMA CRC error, reinject request */
if (request->flags & ADR_F_DMA_USED &&
adp->device->channel->error & ATA_E_ICRC) {
untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
ad_invalidatequeue(adp, request);
if (request->retries++ < AD_MAX_RETRIES)
printf(" retrying\n");
else {
ata_dmainit(adp->device->channel, adp->device->unit,
ata_pmode(adp->device->param), -1, -1);
printf(" falling back to PIO mode\n");
}
TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
return ATA_OP_FINISHED;
}
/* if using DMA, try once again in PIO mode */
if (request->flags & ADR_F_DMA_USED) {
untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
ad_invalidatequeue(adp, request);
ata_dmainit(adp->device->channel, adp->device->unit,
ata_pmode(adp->device->param), -1, -1);
request->flags |= ADR_F_FORCE_PIO;
printf(" trying PIO mode\n");
TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
return ATA_OP_FINISHED;
}
request->flags |= ADR_F_ERROR;
printf(" status=%02x error=%02x\n",
adp->device->channel->status, adp->device->channel->error);
}
/* if we arrived here with forced PIO mode, DMA doesn't work right */
if (request->flags & ADR_F_FORCE_PIO && !(request->flags & ADR_F_ERROR))
ata_prtdev(adp->device, "DMA problem fallback to PIO mode\n");
/* if this was a PIO read operation, get the data */
if (!(request->flags & ADR_F_DMA_USED) &&
(request->flags & (ADR_F_READ | ADR_F_ERROR)) == ADR_F_READ) {
/* ready to receive data? */
if ((adp->device->channel->status & (ATA_S_READY|ATA_S_DSC|ATA_S_DRQ))
!= (ATA_S_READY|ATA_S_DSC|ATA_S_DRQ))
ata_prtdev(adp->device, "read interrupt arrived early");
if (ata_wait(adp->device, (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) != 0) {
ata_prtdev(adp->device, "read error detected (too) late");
request->flags |= ADR_F_ERROR;
}
else {
/* data ready, read in */
if (adp->device->channel->flags & ATA_USE_16BIT)
ATA_INSW(adp->device->channel->r_io, ATA_DATA,
(void*)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int16_t));
else
ATA_INSL(adp->device->channel->r_io, ATA_DATA,
(void*)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int32_t));
}
}
/* finish up transfer */
if (request->flags & ADR_F_ERROR) {
request->bp->bio_error = EIO;
request->bp->bio_flags |= BIO_ERROR;
}
else {
request->bytecount -= request->currentsize;
request->donecount += request->currentsize;
if (request->bytecount > 0) {
ad_transfer(request);
return ATA_OP_CONTINUES;
}
}
/* disarm timeout for this transfer */
untimeout((timeout_t *)ad_timeout, request, request->timeout_handle);
request->bp->bio_resid = request->bytecount;
biofinish(request->bp, &adp->stats, 0);
ad_free(request);
adp->outstanding--;
/* check for SERVICE (tagged operations only) */
return ad_service(adp, 1);
}
int
ad_service(struct ad_softc *adp, int change)
{
/* do we have to check the other device on this channel ? */
if (adp->device->channel->flags & ATA_QUEUED && change) {
int device = adp->device->unit;
if (adp->device->unit == ATA_MASTER) {
if (adp->device->channel->devices & ATA_ATA_SLAVE &&
((struct ad_softc *)
(adp->device->channel->
device[ATA_DEV(ATA_SLAVE)].driver))->flags&AD_F_TAG_ENABLED)
device = ATA_SLAVE;
}
else {
if (adp->device->channel->devices & ATA_ATA_MASTER &&
((struct ad_softc *)
(adp->device->channel->
device[ATA_DEV(ATA_MASTER)].driver))->flags&AD_F_TAG_ENABLED)
device = ATA_MASTER;
}
if (device != adp->device->unit &&
((struct ad_softc *)
(adp->device->channel->
device[ATA_DEV(device)].driver))->outstanding > 0) {
ATA_OUTB(adp->device->channel->r_io, ATA_DRIVE, ATA_D_IBM | device);
adp = adp->device->channel->device[ATA_DEV(device)].driver;
DELAY(1);
}
}
adp->device->channel->status =
ATA_INB(adp->device->channel->r_altio, ATA_ALTSTAT);
/* do we have a SERVICE request from the drive ? */
if (adp->flags & AD_F_TAG_ENABLED &&
adp->outstanding > 0 &&
adp->device->channel->status & ATA_S_SERVICE) {
struct ad_request *request;
int tag;
/* check for error */
if (adp->device->channel->status & ATA_S_ERROR) {
ata_prtdev(adp->device, "Oops! controller says s=0x%02x e=0x%02x\n",
adp->device->channel->status,
adp->device->channel->error);
ad_invalidatequeue(adp, NULL);
return ATA_OP_FINISHED;
}
/* issue SERVICE cmd */
if (ata_command(adp->device, ATA_C_SERVICE, 0, 0, 0, ATA_IMMEDIATE)) {
ata_prtdev(adp->device, "problem executing SERVICE cmd\n");
ad_invalidatequeue(adp, NULL);
return ATA_OP_FINISHED;
}
/* setup the transfer environment when ready */
if (ata_wait(adp->device, ATA_S_READY)) {
ata_prtdev(adp->device, "SERVICE timeout tag=%d s=%02x e=%02x\n",
ATA_INB(adp->device->channel->r_io, ATA_COUNT) >> 3,
adp->device->channel->status,
adp->device->channel->error);
ad_invalidatequeue(adp, NULL);
return ATA_OP_FINISHED;
}
tag = ATA_INB(adp->device->channel->r_io, ATA_COUNT) >> 3;
if (!(request = adp->tags[tag])) {
ata_prtdev(adp->device, "no request for tag=%d\n", tag);
ad_invalidatequeue(adp, NULL);
return ATA_OP_FINISHED;
}
adp->device->channel->active = ATA_ACTIVE_ATA;
adp->device->channel->running = request;
request->serv++;
/* start DMA transfer when ready */
if (ata_wait(adp->device, ATA_S_READY | ATA_S_DRQ)) {
ata_prtdev(adp->device, "timeout starting DMA s=%02x e=%02x\n",
adp->device->channel->status,
adp->device->channel->error);
ad_invalidatequeue(adp, NULL);
return ATA_OP_FINISHED;
}
ata_dmastart(adp->device->channel, adp->device->unit,
request->dmatab, request->flags & ADR_F_READ);
return ATA_OP_CONTINUES;
}
return ATA_OP_FINISHED;
}
static void
ad_free(struct ad_request *request)
{
if (request->dmatab)
free(request->dmatab, M_DEVBUF);
request->softc->tags[request->tag] = NULL;
free(request, M_AD);
}
static void
ad_invalidatequeue(struct ad_softc *adp, struct ad_request *request)
{
/* if tags used invalidate all other tagged transfers */
if (adp->flags & AD_F_TAG_ENABLED) {
struct ad_request *tmpreq;
int tag;
ata_prtdev(adp->device, "invalidating queued requests\n");
for (tag = 0; tag <= adp->num_tags; tag++) {
tmpreq = adp->tags[tag];
adp->tags[tag] = NULL;
if (tmpreq == request || tmpreq == NULL)
continue;
untimeout((timeout_t *)ad_timeout, tmpreq, tmpreq->timeout_handle);
TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, tmpreq, chain);
}
if (ata_command(adp->device, ATA_C_NOP,
0, 0, ATA_C_F_FLUSHQUEUE, ATA_WAIT_READY))
ata_prtdev(adp->device, "flush queue failed\n");
adp->outstanding = 0;
}
}
static int
ad_tagsupported(struct ad_softc *adp)
{
const char *good[] = {"IBM-DPTA", "IBM-DTLA", NULL};
int i = 0;
switch (adp->device->channel->chiptype) {
case 0x4d33105a: /* Promises before TX2 doesn't work with tagged queuing */
case 0x4d38105a:
case 0x0d30105a:
case 0x4d30105a:
return 0;
}
/* check that drive does DMA, has tags enabled, and is one we know works */
if (adp->device->mode >= ATA_DMA && adp->device->param->support.queued &&
adp->device->param->enabled.queued) {
while (good[i] != NULL) {
if (!strncmp(adp->device->param->model, good[i], strlen(good[i])))
return 1;
i++;
}
/*
* check IBM's new obscure way of naming drives
* we want "IC" (IBM CORP) and "AT" or "AV" (ATA interface)
* but doesn't care about the other info (size, capacity etc)
*/
if (!strncmp(adp->device->param->model, "IC", 2) &&
(!strncmp(adp->device->param->model + 8, "AT", 2) ||
!strncmp(adp->device->param->model + 8, "AV", 2)))
return 1;
}
return 0;
}
static void
ad_timeout(struct ad_request *request)
{
struct ad_softc *adp = request->softc;
adp->device->channel->running = NULL;
ata_prtdev(adp->device, "%s command timeout tag=%d serv=%d - resetting\n",
(request->flags & ADR_F_READ) ? "READ" : "WRITE",
request->tag, request->serv);
if (request->flags & ADR_F_DMA_USED) {
ata_dmadone(adp->device->channel);
ad_invalidatequeue(adp, request);
if (request->retries == AD_MAX_RETRIES) {
ata_dmainit(adp->device->channel, adp->device->unit,
ata_pmode(adp->device->param), -1, -1);
ata_prtdev(adp->device, "trying fallback to PIO mode\n");
request->retries = 0;
}
}
/* if retries still permit, reinject this request */
if (request->retries++ < AD_MAX_RETRIES) {
int s = splbio();
TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
splx(s);
}
else {
/* retries all used up, return error */
request->bp->bio_error = EIO;
request->bp->bio_flags |= BIO_ERROR;
biofinish(request->bp, &adp->stats, 0);
ad_free(request);
}
ata_reinit(adp->device->channel);
}
void
ad_reinit(struct ata_device *atadev)
{
struct ad_softc *adp = atadev->driver;
/* reinit disk parameters */
ad_invalidatequeue(atadev->driver, NULL);
ata_command(atadev, ATA_C_SET_MULTI, 0,
adp->transfersize / DEV_BSIZE, 0, ATA_WAIT_READY);
if (adp->device->mode >= ATA_DMA)
ata_dmainit(atadev->channel, atadev->unit,
ata_pmode(adp->device->param),
ata_wmode(adp->device->param),
ata_umode(adp->device->param));
else
ata_dmainit(atadev->channel, atadev->unit,
ata_pmode(adp->device->param), -1, -1);
}
void
ad_print(struct ad_softc *adp)
{
if (bootverbose) {
ata_prtdev(adp->device, "<%.40s/%.8s> ATA-%d disk at ata%d-%s\n",
adp->device->param->model, adp->device->param->revision,
ad_version(adp->device->param->version_major),
device_get_unit(adp->device->channel->dev),
(adp->device->unit == ATA_MASTER) ? "master" : "slave");
ata_prtdev(adp->device,
"%lluMB (%llu sectors), %llu C, %u H, %u S, %u B\n",
(unsigned long long)(adp->total_secs /
((1024L*1024L)/DEV_BSIZE)),
(unsigned long long) adp->total_secs,
(unsigned long long) (adp->total_secs /
(adp->heads * adp->sectors)),
adp->heads, adp->sectors, DEV_BSIZE);
ata_prtdev(adp->device, "%d secs/int, %d depth queue, %s%s\n",
adp->transfersize / DEV_BSIZE, adp->num_tags + 1,
(adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
ata_mode2str(adp->device->mode));
ata_prtdev(adp->device, "piomode=%d dmamode=%d udmamode=%d cblid=%d\n",
ata_pmode(adp->device->param), ata_wmode(adp->device->param),
ata_umode(adp->device->param),
adp->device->param->hwres_cblid);
}
else
ata_prtdev(adp->device,"%lluMB <%.40s> [%lld/%d/%d] at ata%d-%s %s%s\n",
(unsigned long long)(adp->total_secs /
((1024L * 1024L) / DEV_BSIZE)),
adp->device->param->model,
(unsigned long long)(adp->total_secs /
(adp->heads*adp->sectors)),
adp->heads, adp->sectors,
device_get_unit(adp->device->channel->dev),
(adp->device->unit == ATA_MASTER) ? "master" : "slave",
(adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
ata_mode2str(adp->device->mode));
}
static int
ad_version(u_int16_t version)
{
int bit;
if (version == 0xffff)
return 0;
for (bit = 15; bit >= 0; bit--)
if (version & (1<<bit))
return bit;
return 0;
}