freebsd-skq/sys/dev/ata/ata-disk.c
Poul-Henning Kamp 60794e0478 Centralize the devstat handling for all GEOM disk device drivers
in geom_disk.c.

As a side effect this makes a lot of #include <sys/devicestat.h>
lines not needed and some biofinish() calls can be reduced to
biodone() again.
2003-03-08 08:01:31 +00:00

924 lines
29 KiB
C

/*-
* Copyright (c) 1998 - 2003 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/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-pci.h>
#include <dev/ata/ata-disk.h>
#include <dev/ata/ata-raid.h>
/* prototypes */
static disk_open_t adopen;
static disk_close_t adclose;
static disk_strategy_t adstrategy;
static dumper_t addump;
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;
u_int32_t lbasize;
u_int64_t lbasize48;
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;
adp->max_iosize = 256 * DEV_BSIZE;
if (adp->device->channel->flags & ATA_USE_PC98GEOM &&
adp->total_secs < 17 * 8 * 65536) {
adp->sectors = 17;
adp->heads = 8;
}
bioq_init(&adp->queue);
lbasize = (u_int32_t)atadev->param->lba_size_1 |
((u_int32_t)atadev->param->lba_size_2 << 16);
/* does this device need oldstyle CHS addressing */
if (!ad_version(atadev->param->version_major) ||
!(atadev->param->atavalid & ATA_FLAG_54_58) || !lbasize)
adp->flags |= AD_F_CHS_USED;
/* use the 28bit LBA size if valid */
if (atadev->param->cylinders == 16383 && adp->total_secs < lbasize)
adp->total_secs = lbasize;
lbasize48 = ((u_int64_t)atadev->param->lba_size48_1) |
((u_int64_t)atadev->param->lba_size48_2 << 16) |
((u_int64_t)atadev->param->lba_size48_3 << 32) |
((u_int64_t)atadev->param->lba_size48_4 << 48);
/* use the 48bit LBA size if valid */
if (atadev->param->support.address48 && lbasize48 > 268435455)
adp->total_secs = lbasize48;
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 && atadev->channel->dma)
atadev->setmode(atadev, ATA_DMA_MAX);
else
atadev->setmode(atadev, ATA_PIO_MAX);
/* use tagged queueing if allowed and supported */
#if 0 /* disable tags for now */
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");
}
#endif
ATA_UNLOCK_CH(atadev->channel);
adp->disk.d_open = adopen;
adp->disk.d_close = adclose;
adp->disk.d_strategy = adstrategy;
adp->disk.d_dump = addump;
adp->disk.d_name = "ad";
adp->disk.d_drv1 = adp;
adp->disk.d_maxsize = adp->max_iosize;
adp->disk.d_sectorsize = DEV_BSIZE;
adp->disk.d_mediasize = DEV_BSIZE * (off_t)adp->total_secs;
adp->disk.d_fwsectors = adp->sectors;
adp->disk.d_fwheads = adp->heads;
disk_create(adp->lun, &adp->disk, 0, NULL, NULL);
atadev->driver = adp;
atadev->flags = 0;
ata_enclosure_print(atadev);
/* if this disk belongs to an ATA RAID dont print the probe */
if (ata_raiddisk_attach(adp))
adp->flags |= AD_F_RAID_SUBDISK;
else {
if (atadev->driver) {
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);
}
if (atadev->channel->dma)
atadev->channel->dma->free(atadev);
while ((bp = bioq_first(&adp->queue))) {
bioq_remove(&adp->queue, bp);
biofinish(bp, NULL, ENXIO);
}
disk_destroy(&adp->disk);
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(struct disk *dp)
{
struct ad_softc *adp = dp->d_drv1;
if (adp->flags & AD_F_RAID_SUBDISK)
return EBUSY;
/* hold off access to we are fully attached */
while (ata_delayed_attach)
tsleep(&ata_delayed_attach, PRIBIO, "adopn", 1);
return 0;
}
static int
adclose(struct disk *dp)
{
struct ad_softc *adp = dp->d_drv1;
adp->device->channel->locking(adp->device->channel, ATA_LF_LOCK);
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);
adp->device->channel->locking(adp->device->channel, ATA_LF_UNLOCK);
return 0;
}
static void
adstrategy(struct bio *bp)
{
struct ad_softc *adp = bp->bio_disk->d_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);
}
static int
addump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
{
struct ad_softc *adp;
struct ad_request request;
static int once;
struct disk *dp;
dp = arg;
adp = dp->d_drv1;
if (!adp)
return ENXIO;
if (!once) {
/* force PIO mode for dumps */
adp->device->mode = ATA_PIO;
adp->device->channel->locking(adp->device->channel, ATA_LF_LOCK);
ata_reinit(adp->device->channel);
adp->device->channel->locking(adp->device->channel, ATA_LF_UNLOCK);
once = 1;
}
if (length > 0) {
bzero(&request, sizeof(struct ad_request));
request.softc = adp;
request.blockaddr = offset / DEV_BSIZE;
request.bytecount = length;
request.data = virtual;
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);
}
} else {
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 && atadev->channel->dma->alloc(atadev))
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;
u_int8_t cmd;
int flags = ATA_IMMEDIATE;
/* get request params */
adp = request->softc;
/* calculate transfer details */
lba = request->blockaddr + (request->donecount / DEV_BSIZE);
/* start timeout for this transfer */
if (!request->timeout_handle.callout && !dumping)
request->timeout_handle =
timeout((timeout_t*)ad_timeout, request, 10 * hz);
if (request->donecount == 0) {
/* check & setup transfer parameters */
if (request->bytecount > adp->max_iosize) {
ata_prtdev(adp->device,
"%d byte transfers not supported\n", request->bytecount);
count = howmany(adp->max_iosize, DEV_BSIZE);
}
else
count = howmany(request->bytecount, DEV_BSIZE);
if (count > (adp->device->param->support.address48 ? 65536 : 256)) {
ata_prtdev(adp->device,
"%d block transfers not supported\n", count);
count = adp->device->param->support.address48 ? 65536 : 256;
}
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;
}
/* does this drive & transfer work with DMA ? */
request->flags &= ~ADR_F_DMA_USED;
if (adp->device->mode >= ATA_DMA &&
!adp->device->channel->dma->setup(adp->device, 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 */
adp->device->channel->dma->start(adp->device, request->data, request->bytecount,
request->flags & ADR_F_READ);
return ATA_OP_CONTINUES;
}
/* does this drive support multi sector transfers ? */
if (adp->transfersize > 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_STRM(adp->device->channel->r_io, ATA_DATA,
(void *)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int16_t));
else
ATA_OUTSL_STRM(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);
/* 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;
biodone(request->bp);
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 = adp->device->channel->dma->stop(adp->device);
/* do we have a corrected soft error ? */
if (adp->device->channel->status & ATA_S_CORR)
disk_err(request->bp, "soft error (ECC corrected)",
request->blockaddr + (request->donecount / DEV_BSIZE), 1);
/* 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);
disk_err(request->bp, (adp->device->channel->error & ATA_E_ICRC) ?
"UDMA ICRC error" : "hard error",
request->blockaddr + (request->donecount / DEV_BSIZE), 1);
/* 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 {
adp->device->setmode(adp->device, ATA_PIO_MAX);
printf(" falling back to PIO mode\n");
}
TAILQ_INSERT_HEAD(&adp->device->channel->ata_queue, request, chain);
return ATA_OP_FINISHED;
}
#if 0 /* XXX*/
/* 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);
adp->device->setmode(adp->device, ATA_PIO_MAX);
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;
}
#endif
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_STRM(adp->device->channel->r_io, ATA_DATA,
(void*)((uintptr_t)request->data +
request->donecount), request->currentsize /
sizeof(int16_t));
else
ATA_INSL_STRM(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->flags & ADR_F_DMA_USED) && 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;
biodone(request->bp);
ad_free(request);
adp->outstanding--;
/* check for SERVICE */
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) &&
(adp->device->channel->device[SLAVE].driver) &&
((struct ad_softc *) (adp->device->channel->
device[SLAVE].driver))->flags & AD_F_TAG_ENABLED)
device = ATA_SLAVE;
}
else {
if ((adp->device->channel->devices & ATA_ATA_MASTER) &&
(adp->device->channel->device[MASTER].driver) &&
((struct ad_softc *) (adp->device->channel->
device[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;
}
ATA_FORCELOCK_CH(adp->device->channel, 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;
}
adp->device->channel->dma->start(adp->device, request->data, request->bytecount,
request->flags & ADR_F_READ);
return ATA_OP_CONTINUES;
}
return ATA_OP_FINISHED;
}
static void
ad_free(struct ad_request *request)
{
request->softc->tags[request->tag] = NULL;
free(request, M_AD);
}
static void
ad_invalidatequeue(struct ad_softc *adp, struct ad_request *request)
{
/* if tags in use invalidate all other outstanding 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);
}
adp->outstanding = 0;
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");
}
}
static int
ad_tagsupported(struct ad_softc *adp)
{
/* check for controllers that we know doesn't support tags */
switch (adp->device->channel->chiptype) {
case ATA_PDC20265: case ATA_PDC20263: case ATA_PDC20267:
case ATA_PDC20246: case ATA_PDC20262:
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) {
/* IBM DTTA series needs transfers <= 64K for tags to work properly */
if (!strncmp(adp->device->param->model, "IBM-DTTA", 8)) {
adp->max_iosize = 128 * DEV_BSIZE;
return 1;
}
/* IBM DJNA series has broken tags, corrupts data */
if (!strncmp(adp->device->param->model, "IBM-DJNA", 8))
return 0;
/* IBM DPTA & IBM DTLA series supports tags */
if (!strncmp(adp->device->param->model, "IBM-DPTA", 8) ||
!strncmp(adp->device->param->model, "IBM-DTLA", 8))
return 1;
/* IBM IC series ATA drives supports tags */
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;
request->timeout_handle.callout = 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) {
adp->device->channel->dma->stop(adp->device);
ad_invalidatequeue(adp, request);
if (request->retries == AD_MAX_RETRIES) {
adp->device->setmode(adp->device, ATA_PIO_MAX);
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) {
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;
biodone(request->bp);
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);
atadev->setmode(atadev, adp->device->mode);
}
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;
}