4c2d9f25f3
Dont try to enable read/write caching on devices that doesn't support it, this reduces the noise from ATA on flash devices and the like. Approved by: re@ (scottl)
447 lines
13 KiB
C
447 lines
13 KiB
C
/*-
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* Copyright (c) 1998 - 2005 Søren Schmidt <sos@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ata.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ata.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/disk.h>
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#include <sys/cons.h>
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#include <sys/sysctl.h>
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#include <sys/sema.h>
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#include <sys/taskqueue.h>
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#include <vm/uma.h>
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#include <machine/md_var.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <geom/geom_disk.h>
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#include <dev/ata/ata-all.h>
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#include <dev/ata/ata-pci.h>
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#include <dev/ata/ata-disk.h>
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#include <dev/ata/ata-raid.h>
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#include <ata_if.h>
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/* prototypes */
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static void ad_init(device_t);
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static void ad_done(struct ata_request *);
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static void ad_describe(device_t dev);
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static int ad_version(u_int16_t);
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static disk_strategy_t ad_strategy;
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static disk_ioctl_t ad_ioctl;
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static dumper_t ad_dump;
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/* local vars */
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static MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
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static int
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ad_probe(device_t dev)
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{
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struct ata_device *atadev = device_get_softc(dev);
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if (!(atadev->param.config & ATA_PROTO_ATAPI) ||
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(atadev->param.config == ATA_CFA_MAGIC))
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return 0;
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else
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return ENXIO;
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}
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static int
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ad_attach(device_t dev)
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{
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struct ata_channel *ch = device_get_softc(device_get_parent(dev));
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struct ata_device *atadev = device_get_softc(dev);
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struct ad_softc *adp;
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u_int32_t lbasize;
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u_int64_t lbasize48;
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/* check that we have a virgin disk to attach */
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if (device_get_ivars(dev))
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return EEXIST;
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if (!(adp = malloc(sizeof(struct ad_softc), M_AD, M_NOWAIT | M_ZERO))) {
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device_printf(dev, "out of memory\n");
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return ENOMEM;
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}
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device_set_ivars(dev, adp);
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if (atadev->param.atavalid & ATA_FLAG_54_58) {
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adp->heads = atadev->param.current_heads;
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adp->sectors = atadev->param.current_sectors;
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adp->total_secs = (u_int32_t)atadev->param.current_size_1 |
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((u_int32_t)atadev->param.current_size_2 << 16);
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}
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else {
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adp->heads = atadev->param.heads;
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adp->sectors = atadev->param.sectors;
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adp->total_secs = atadev->param.cylinders * adp->heads * adp->sectors;
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}
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lbasize = (u_int32_t)atadev->param.lba_size_1 |
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((u_int32_t)atadev->param.lba_size_2 << 16);
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/* does this device need oldstyle CHS addressing */
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if (!ad_version(atadev->param.version_major) || !lbasize)
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atadev->flags |= ATA_D_USE_CHS;
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/* use the 28bit LBA size if valid or bigger than the CHS mapping */
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if (atadev->param.cylinders == 16383 || adp->total_secs < lbasize)
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adp->total_secs = lbasize;
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/* use the 48bit LBA size if valid */
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lbasize48 = ((u_int64_t)atadev->param.lba_size48_1) |
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((u_int64_t)atadev->param.lba_size48_2 << 16) |
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((u_int64_t)atadev->param.lba_size48_3 << 32) |
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((u_int64_t)atadev->param.lba_size48_4 << 48);
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if ((atadev->param.support.command2 & ATA_SUPPORT_ADDRESS48) &&
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lbasize48 > ATA_MAX_28BIT_LBA)
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adp->total_secs = lbasize48;
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/* init device parameters */
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ad_init(dev);
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/* announce we are here */
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ad_describe(dev);
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/* create the disk device */
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adp->disk = disk_alloc();
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adp->disk->d_strategy = ad_strategy;
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adp->disk->d_ioctl = ad_ioctl;
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adp->disk->d_dump = ad_dump;
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adp->disk->d_name = "ad";
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adp->disk->d_drv1 = dev;
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if (ch->dma)
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adp->disk->d_maxsize = ch->dma->max_iosize;
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else
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adp->disk->d_maxsize = DFLTPHYS;
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adp->disk->d_sectorsize = DEV_BSIZE;
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adp->disk->d_mediasize = DEV_BSIZE * (off_t)adp->total_secs;
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adp->disk->d_fwsectors = adp->sectors;
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adp->disk->d_fwheads = adp->heads;
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adp->disk->d_unit = device_get_unit(dev);
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disk_create(adp->disk, DISK_VERSION);
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device_add_child(dev, "subdisk", device_get_unit(dev));
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bus_generic_attach(dev);
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return 0;
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}
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static int
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ad_detach(device_t dev)
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{
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struct ad_softc *adp = device_get_ivars(dev);
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device_t *children;
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int nchildren, i;
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/* check that we have a valid disk to detach */
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if (!device_get_ivars(dev))
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return ENXIO;
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/* detach & delete all children */
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if (!device_get_children(dev, &children, &nchildren)) {
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for (i = 0; i < nchildren; i++)
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if (children[i])
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device_delete_child(dev, children[i]);
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free(children, M_TEMP);
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}
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/* detroy disk from the system so we dont get any further requests */
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disk_destroy(adp->disk);
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/* fail requests on the queue and any thats "in flight" for this device */
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ata_fail_requests(dev);
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/* dont leave anything behind */
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device_set_ivars(dev, NULL);
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free(adp, M_AD);
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return 0;
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}
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static void
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ad_shutdown(device_t dev)
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{
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struct ata_device *atadev = device_get_softc(dev);
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if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
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ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
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}
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static int
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ad_reinit(device_t dev)
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{
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struct ata_channel *ch = device_get_softc(device_get_parent(dev));
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struct ata_device *atadev = device_get_softc(dev);
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/* if detach pending, return error */
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if (((atadev->unit == ATA_MASTER) && !(ch->devices & ATA_ATA_MASTER)) ||
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((atadev->unit == ATA_SLAVE) && !(ch->devices & ATA_ATA_SLAVE))) {
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return 1;
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}
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ad_init(dev);
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return 0;
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}
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static void
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ad_strategy(struct bio *bp)
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{
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device_t dev = bp->bio_disk->d_drv1;
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struct ata_device *atadev = device_get_softc(dev);
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struct ata_request *request;
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if (!(request = ata_alloc_request())) {
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device_printf(dev, "FAILURE - out of memory in start\n");
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biofinish(bp, NULL, ENOMEM);
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return;
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}
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/* setup request */
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request->dev = dev;
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request->bio = bp;
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request->callback = ad_done;
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request->timeout = 5;
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request->retries = 2;
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request->data = bp->bio_data;
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request->bytecount = bp->bio_bcount;
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request->u.ata.lba = bp->bio_pblkno;
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request->u.ata.count = request->bytecount / DEV_BSIZE;
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request->transfersize = min(bp->bio_bcount, atadev->max_iosize);
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switch (bp->bio_cmd) {
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case BIO_READ:
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request->flags = ATA_R_READ;
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if (atadev->mode >= ATA_DMA) {
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request->u.ata.command = ATA_READ_DMA;
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request->flags |= ATA_R_DMA;
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}
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else if (atadev->max_iosize > DEV_BSIZE)
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request->u.ata.command = ATA_READ_MUL;
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else
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request->u.ata.command = ATA_READ;
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break;
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case BIO_WRITE:
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request->flags = ATA_R_WRITE;
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if (atadev->mode >= ATA_DMA) {
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request->u.ata.command = ATA_WRITE_DMA;
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request->flags |= ATA_R_DMA;
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}
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else if (atadev->max_iosize > DEV_BSIZE)
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request->u.ata.command = ATA_WRITE_MUL;
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else
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request->u.ata.command = ATA_WRITE;
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break;
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default:
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device_printf(dev, "FAILURE - unknown BIO operation\n");
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ata_free_request(request);
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biofinish(bp, NULL, EIO);
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return;
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}
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request->flags |= ATA_R_ORDERED;
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ata_queue_request(request);
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}
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static void
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ad_done(struct ata_request *request)
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{
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struct bio *bp = request->bio;
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/* finish up transfer */
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if ((bp->bio_error = request->result))
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bp->bio_flags |= BIO_ERROR;
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bp->bio_resid = bp->bio_bcount - request->donecount;
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biodone(bp);
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ata_free_request(request);
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}
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static int
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ad_ioctl(struct disk *disk, u_long cmd, void *data, int flag, struct thread *td)
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{
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return ata_device_ioctl(disk->d_drv1, cmd, data);
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}
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static int
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ad_dump(void *arg, void *virtual, vm_offset_t physical,
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off_t offset, size_t length)
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{
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struct disk *dp = arg;
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device_t dev = dp->d_drv1;
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struct ata_device *atadev = device_get_softc(dev);
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struct ad_softc *adp = device_get_ivars(dev);
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struct ata_channel *ch = device_get_softc(device_get_parent(dev));
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struct ata_request request;
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if (!adp)
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return ENXIO;
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bzero(&request, sizeof(struct ata_request));
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request.dev = dev;
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if (length) {
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request.data = virtual;
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request.bytecount = length;
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request.transfersize = min(length, atadev->max_iosize);
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request.flags = ATA_R_WRITE;
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if (atadev->max_iosize > DEV_BSIZE)
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request.u.ata.command = ATA_WRITE_MUL;
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else
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request.u.ata.command = ATA_WRITE;
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request.u.ata.lba = offset / DEV_BSIZE;
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request.u.ata.count = request.bytecount / DEV_BSIZE;
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}
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else {
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request.u.ata.command = ATA_FLUSHCACHE;
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request.flags = ATA_R_CONTROL;
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}
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if (ch->hw.begin_transaction(&request) == ATA_OP_CONTINUES) {
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do {
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DELAY(20);
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} while (ch->hw.end_transaction(&request) == ATA_OP_CONTINUES);
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}
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if (request.status & ATA_S_ERROR)
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return EIO;
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return 0;
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}
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static void
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ad_init(device_t dev)
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{
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struct ata_device *atadev = device_get_softc(dev);
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ATA_SETMODE(device_get_parent(dev), dev);
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/* enable readahead caching */
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if (atadev->param.support.command1 & ATA_SUPPORT_LOOKAHEAD)
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ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_RCACHE, 0, 0);
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/* enable write caching if supported and configured */
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if (atadev->param.support.command1 & ATA_SUPPORT_WRITECACHE) {
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if (ata_wc)
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ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_WCACHE, 0, 0);
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else
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ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_DIS_WCACHE, 0, 0);
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}
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/* use multiple sectors/interrupt if device supports it */
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if (ad_version(atadev->param.version_major)) {
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int secsperint = max(1, min(atadev->param.sectors_intr, 16));
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if (!ata_controlcmd(dev, ATA_SET_MULTI, 0, 0, secsperint))
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atadev->max_iosize = secsperint * DEV_BSIZE;
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}
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else
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atadev->max_iosize = DEV_BSIZE;
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}
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void
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ad_describe(device_t dev)
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{
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struct ata_channel *ch = device_get_softc(device_get_parent(dev));
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struct ata_device *atadev = device_get_softc(dev);
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struct ad_softc *adp = device_get_ivars(dev);
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u_int8_t *marker, vendor[64], product[64];
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/* try to seperate the ATA model string into vendor and model parts */
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if ((marker = index(atadev->param.model, ' ')) ||
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(marker = index(atadev->param.model, '-'))) {
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int len = (marker - atadev->param.model);
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strncpy(vendor, atadev->param.model, len);
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vendor[len++] = 0;
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strcat(vendor, " ");
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strncpy(product, atadev->param.model + len, 40 - len);
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vendor[40 - len] = 0;
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}
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else {
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if (!strncmp(atadev->param.model, "ST", 2))
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strcpy(vendor, "Seagate ");
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else
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strcpy(vendor, "");
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strncpy(product, atadev->param.model, 40);
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}
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device_printf(dev, "%lluMB <%s%s %.8s> at ata%d-%s %s%s\n",
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(unsigned long long)(adp->total_secs / (1048576 / DEV_BSIZE)),
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vendor, product, atadev->param.revision,
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device_get_unit(ch->dev),
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(atadev->unit == ATA_MASTER) ? "master" : "slave",
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(adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
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ata_mode2str(atadev->mode));
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if (bootverbose) {
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device_printf(dev, "%llu sectors [%lldC/%dH/%dS] "
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"%d sectors/interrupt %d depth queue\n",
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(unsigned long long)adp->total_secs,
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(unsigned long long)(adp->total_secs /
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(adp->heads * adp->sectors)),
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adp->heads, adp->sectors, atadev->max_iosize / DEV_BSIZE,
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adp->num_tags + 1);
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}
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}
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static int
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ad_version(u_int16_t version)
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{
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int bit;
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if (version == 0xffff)
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return 0;
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for (bit = 15; bit >= 0; bit--)
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if (version & (1<<bit))
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return bit;
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return 0;
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}
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static device_method_t ad_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, ad_probe),
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DEVMETHOD(device_attach, ad_attach),
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DEVMETHOD(device_detach, ad_detach),
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DEVMETHOD(device_shutdown, ad_shutdown),
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/* ATA methods */
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DEVMETHOD(ata_reinit, ad_reinit),
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{ 0, 0 }
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};
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static driver_t ad_driver = {
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"ad",
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ad_methods,
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0,
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};
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devclass_t ad_devclass;
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DRIVER_MODULE(ad, ata, ad_driver, ad_devclass, NULL, NULL);
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MODULE_VERSION(ad, 1);
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MODULE_DEPEND(ad, ata, 1, 1, 1);
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