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freebsd-skq/sys/dev/ata/ata-disk.c

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/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#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 <sys/taskqueue.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <geom/geom_disk.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 void ad_detach(struct ata_device *);
static void ad_start(struct ata_device *);
static void ad_done(struct ata_request *);
static disk_open_t adopen;
static disk_strategy_t adstrategy;
static dumper_t addump;
void ad_print(struct ad_softc *);
static int ad_version(u_int16_t);
/* internal vars */
static MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
static u_int32_t adp_lun_map = 0;
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, "FAILURE - could not allocate driver storage\n");
atadev->attach = NULL;
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;
if (adp->device->channel->flags & ATA_USE_PC98GEOM &&
adp->total_secs < 17 * 8 * 65536) {
adp->sectors = 17;
adp->heads = 8;
}
mtx_init(&adp->queue_mtx, "ATA disk bioqueue lock", MTX_DEF, 0);
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)
atadev->flags |= ATA_D_USE_CHS;
/* use the 28bit LBA size if valid or bigger than the CHS mapping */
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.command2 & ATA_SUPPORT_ADDRESS48) &&
lbasize48 > 268435455)
adp->total_secs = lbasize48;
/* enable read caching */
ata_controlcmd(atadev, ATA_SETFEATURES, ATA_SF_ENAB_RCACHE, 0, 0);
/* enable write caching if enabled */
if (ata_wc)
ata_controlcmd(atadev, ATA_SETFEATURES, ATA_SF_ENAB_WCACHE, 0, 0);
else
ata_controlcmd(atadev, ATA_SETFEATURES, ATA_SF_DIS_WCACHE, 0, 0);
/* use multiple sectors/interrupt if device supports it */
adp->max_iosize = DEV_BSIZE;
if (ad_version(atadev->param->version_major)) {
int secsperint = max(1, min(atadev->param->sectors_intr, 16));
if (!ata_controlcmd(atadev, ATA_SET_MULTI, 0, 0, secsperint))
adp->max_iosize = secsperint * DEV_BSIZE;
}
/* setup the function ptrs */
atadev->detach = ad_detach;
atadev->start = ad_start;
atadev->softc = adp;
/* lets create the disk device */
adp->disk.d_open = adopen;
adp->disk.d_strategy = adstrategy;
adp->disk.d_dump = addump;
adp->disk.d_name = "ad";
adp->disk.d_drv1 = adp;
if (atadev->channel->dma)
adp->disk.d_maxsize = atadev->channel->dma->max_iosize;
else
adp->disk.d_maxsize = DFLTPHYS;
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, DISKFLAG_NOGIANT, NULL, NULL);
/* announce we are here */
ad_print(adp);
#ifdef DEV_ATARAID
ata_raiddisk_attach(adp);
#endif
}
static void
ad_detach(struct ata_device *atadev)
{
struct ad_softc *adp = atadev->softc;
atadev->flags |= ATA_D_DETACHING;
#ifdef DEV_ATARAID
if (adp->flags & AD_F_RAID_SUBDISK)
ata_raiddisk_detach(adp);
#endif
mtx_lock(&adp->queue_mtx);
bioq_flush(&adp->queue, NULL, ENXIO);
mtx_unlock(&adp->queue_mtx);
disk_destroy(&adp->disk);
ata_prtdev(atadev, "WARNING - removed from configuration\n");
ata_free_name(atadev);
ata_free_lun(&adp_lun_map, adp->lun);
atadev->attach = NULL;
atadev->detach = NULL;
atadev->start = NULL;
atadev->softc = NULL;
atadev->flags = 0;
free(adp, M_AD);
}
static int
adopen(struct disk *dp)
{
struct ad_softc *adp = dp->d_drv1;
if (adp->device->flags & ATA_D_DETACHING)
return ENXIO;
return 0;
}
static void
adstrategy(struct bio *bp)
{
struct ad_softc *adp = bp->bio_disk->d_drv1;
if (adp->device->flags & ATA_D_DETACHING) {
biofinish(bp, NULL, ENXIO);
return;
}
mtx_lock(&adp->queue_mtx);
bioq_disksort(&adp->queue, bp);
mtx_unlock(&adp->queue_mtx);
ata_start(adp->device->channel);
}
static void
ad_start(struct ata_device *atadev)
{
struct ad_softc *adp = atadev->softc;
struct bio *bp;
struct ata_request *request;
/* remove request from drive queue */
mtx_lock(&adp->queue_mtx);
bp = bioq_first(&adp->queue);
if (!bp) {
mtx_unlock(&adp->queue_mtx);
return;
}
bioq_remove(&adp->queue, bp);
mtx_unlock(&adp->queue_mtx);
if (!(request = ata_alloc_request())) {
ata_prtdev(atadev, "FAILURE - out of memory in start\n");
biofinish(bp, NULL, ENOMEM);
return;
}
/* setup request */
request->device = atadev;
request->driver = bp;
request->callback = ad_done;
request->timeout = 10;
request->retries = 2;
request->data = bp->bio_data;
request->bytecount = bp->bio_bcount;
/* convert LBA contents if this is an old non-LBA device */
if (atadev->flags & ATA_D_USE_CHS) {
int sector = (bp->bio_pblkno % adp->sectors) + 1;
int cylinder = bp->bio_pblkno / (adp->sectors * adp->heads);
int head = (bp->bio_pblkno %
(adp->sectors * adp->heads)) / adp->sectors;
request->u.ata.lba =
(sector & 0xff) | (cylinder & 0xffff) << 8 | (head & 0xf) << 24;
}
else
request->u.ata.lba = bp->bio_pblkno;
request->u.ata.count = request->bytecount / DEV_BSIZE;
request->transfersize = min(bp->bio_bcount, adp->max_iosize);
switch (bp->bio_cmd) {
case BIO_READ:
request->flags |= ATA_R_READ;
if (atadev->mode >= ATA_DMA) {
request->u.ata.command = ATA_READ_DMA;
request->flags |= ATA_R_DMA;
}
else if (adp->max_iosize > DEV_BSIZE)
request->u.ata.command = ATA_READ_MUL;
else
request->u.ata.command = ATA_READ;
break;
case BIO_WRITE:
request->flags |= ATA_R_WRITE;
if (atadev->mode >= ATA_DMA) {
request->u.ata.command = ATA_WRITE_DMA;
request->flags |= ATA_R_DMA;
}
else if (adp->max_iosize > DEV_BSIZE)
request->u.ata.command = ATA_WRITE_MUL;
else
request->u.ata.command = ATA_WRITE;
break;
default:
ata_prtdev(atadev, "FAILURE - unknown BIO operation\n");
ata_free_request(request);
biofinish(bp, NULL, EIO);
return;
}
request->flags |= ATA_R_SKIPSTART;
ata_queue_request(request);
}
static void
ad_done(struct ata_request *request)
{
struct bio *bp = request->driver;
/* finish up transfer */
if ((bp->bio_error = request->result))
bp->bio_flags |= BIO_ERROR;
bp->bio_resid = bp->bio_bcount - request->donecount;
biodone(bp);
ata_free_request(request);
}
static int
addump(void *arg, void *virtual, vm_offset_t physical,
off_t offset, size_t length)
{
struct ata_request request;
struct disk *dp = arg;
struct ad_softc *adp = dp->d_drv1;
if (!adp)
return ENXIO;
bzero(&request, sizeof(struct ata_request));
request.device = adp->device;
if (length) {
request.data = virtual;
request.bytecount = length;
request.transfersize = min(length, adp->max_iosize);
request.flags = ATA_R_WRITE;
if (adp->max_iosize > DEV_BSIZE)
request.u.ata.command = ATA_WRITE_MUL;
else
request.u.ata.command = ATA_WRITE;
request.u.ata.lba = offset / DEV_BSIZE;
request.u.ata.count = request.bytecount / DEV_BSIZE;
}
else {
request.u.ata.command = ATA_FLUSHCACHE;
request.flags = ATA_R_CONTROL;
}
if (request.device->channel->hw.transaction(&request) == ATA_OP_CONTINUES) {
while (request.device->channel->running == &request &&
!(request.status & ATA_S_ERROR)) {
DELAY(20);
request.device->channel->running = &request;
request.device->channel->hw.interrupt(request.device->channel);
}
}
if (request.status & ATA_S_ERROR)
return EIO;
return 0;
}
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->max_iosize / DEV_BSIZE, adp->num_tags + 1,
(adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
ata_mode2str(adp->device->mode));
}
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;
}
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