7812d86f03
and predictable way, and I apologize if I have gotten it wrong anywhere, getting prior review on a patch like this is not feasible, considering the number of people involved and hardware availability etc.) If struct disklabel is the messenger: kill the messenger. Inside struct disk we had a struct disklabel which disk drivers used to communicate certain metrics to the disklayer above (GEOM or the disk mini-layer). This commit changes this communication to use four explicit fields instead. Amongst the benefits is that the fields do not get overwritten by wrong or bogus on-disk disklabels. Once that is clear, <sys/disk.h> which is included in the drivers no longer need to pull <sys/disklabel.h> and <sys/diskslice.h> in, the few places that needs them, have gotten explicit #includes for them. The disklabel inside struct disk is now only for internal use in the disk mini-layer, so instead of embedding it, we malloc it as we need it. This concludes (modulus any mistakes) the series of disklabel related commits. I belive it all amounts to a NOP for all the rest of you :-) Sponsored by: DARPA & NAI Labs.
406 lines
11 KiB
C
406 lines
11 KiB
C
/*-
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* Copyright (c) 1998,1999,2000,2001,2002 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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* $FreeBSD$
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*/
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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/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/devicestat.h>
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#include <sys/cdio.h>
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#include <machine/bus.h>
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#include <dev/ata/ata-all.h>
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#include <dev/ata/atapi-all.h>
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#include <dev/ata/atapi-fd.h>
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/* device structures */
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static d_open_t afdopen;
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static d_close_t afdclose;
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static d_ioctl_t afdioctl;
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static d_strategy_t afdstrategy;
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static struct cdevsw afd_cdevsw = {
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/* open */ afdopen,
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/* close */ afdclose,
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/* read */ physread,
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/* write */ physwrite,
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/* ioctl */ afdioctl,
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/* poll */ nopoll,
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/* mmap */ nommap,
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/* strategy */ afdstrategy,
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/* name */ "afd",
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/* maj */ 118,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ D_DISK | D_TRACKCLOSE,
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};
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static struct cdevsw afddisk_cdevsw;
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/* prototypes */
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static int afd_sense(struct afd_softc *);
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static void afd_describe(struct afd_softc *);
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static int afd_done(struct atapi_request *);
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static int afd_eject(struct afd_softc *, int);
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static int afd_start_stop(struct afd_softc *, int);
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static int afd_prevent_allow(struct afd_softc *, int);
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/* internal vars */
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static u_int32_t afd_lun_map = 0;
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static MALLOC_DEFINE(M_AFD, "AFD driver", "ATAPI floppy driver buffers");
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int
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afdattach(struct ata_device *atadev)
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{
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struct afd_softc *fdp;
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dev_t dev;
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fdp = malloc(sizeof(struct afd_softc), M_AFD, M_NOWAIT | M_ZERO);
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if (!fdp) {
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ata_prtdev(atadev, "out of memory\n");
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return 0;
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}
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fdp->device = atadev;
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fdp->lun = ata_get_lun(&afd_lun_map);
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ata_set_name(atadev, "afd", fdp->lun);
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bioq_init(&fdp->queue);
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if (afd_sense(fdp)) {
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free(fdp, M_AFD);
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return 0;
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}
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devstat_add_entry(&fdp->stats, "afd", fdp->lun, DEV_BSIZE,
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DEVSTAT_NO_ORDERED_TAGS,
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DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
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DEVSTAT_PRIORITY_WFD);
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dev = disk_create(fdp->lun, &fdp->disk, 0, &afd_cdevsw, &afddisk_cdevsw);
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dev->si_drv1 = fdp;
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fdp->dev = dev;
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fdp->dev->si_iosize_max = 256 * DEV_BSIZE;
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afd_describe(fdp);
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atadev->flags |= ATA_D_MEDIA_CHANGED;
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atadev->driver = fdp;
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return 1;
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}
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void
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afddetach(struct ata_device *atadev)
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{
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struct afd_softc *fdp = atadev->driver;
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struct bio *bp;
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while ((bp = bioq_first(&fdp->queue))) {
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bioq_remove(&fdp->queue, bp);
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biofinish(bp, NULL, ENXIO);
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}
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disk_invalidate(&fdp->disk);
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disk_destroy(fdp->dev);
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devstat_remove_entry(&fdp->stats);
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ata_free_name(atadev);
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ata_free_lun(&afd_lun_map, fdp->lun);
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free(fdp, M_AFD);
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atadev->driver = NULL;
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}
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static int
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afd_sense(struct afd_softc *fdp)
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{
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int8_t ccb[16] = { ATAPI_MODE_SENSE_BIG, 0, ATAPI_REWRITEABLE_CAP_PAGE,
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0, 0, 0, 0, sizeof(struct afd_cappage) >> 8,
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sizeof(struct afd_cappage) & 0xff, 0, 0, 0, 0, 0, 0, 0 };
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int count, error = 0;
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/* The IOMEGA Clik! doesn't support reading the cap page, fake it */
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if (!strncmp(fdp->device->param->model, "IOMEGA Clik!", 12)) {
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fdp->cap.transfer_rate = 500;
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fdp->cap.heads = 1;
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fdp->cap.sectors = 2;
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fdp->cap.cylinders = 39441;
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fdp->cap.sector_size = 512;
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atapi_test_ready(fdp->device);
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return 0;
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}
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/* get drive capabilities, some drives needs this repeated */
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for (count = 0 ; count < 5 ; count++) {
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if (!(error = atapi_queue_cmd(fdp->device, ccb, (caddr_t)&fdp->cap,
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sizeof(struct afd_cappage),
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ATPR_F_READ, 30, NULL, NULL)))
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break;
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}
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if (error || fdp->cap.page_code != ATAPI_REWRITEABLE_CAP_PAGE)
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return 1;
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fdp->cap.cylinders = ntohs(fdp->cap.cylinders);
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fdp->cap.sector_size = ntohs(fdp->cap.sector_size);
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fdp->cap.transfer_rate = ntohs(fdp->cap.transfer_rate);
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return 0;
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}
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static void
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afd_describe(struct afd_softc *fdp)
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{
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if (bootverbose) {
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ata_prtdev(fdp->device,
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"<%.40s/%.8s> rewriteable drive at ata%d as %s\n",
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fdp->device->param->model, fdp->device->param->revision,
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device_get_unit(fdp->device->channel->dev),
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(fdp->device->unit == ATA_MASTER) ? "master" : "slave");
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ata_prtdev(fdp->device,
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"%luMB (%u sectors), %u cyls, %u heads, %u S/T, %u B/S\n",
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(fdp->cap.cylinders * fdp->cap.heads * fdp->cap.sectors) /
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((1024L * 1024L) / fdp->cap.sector_size),
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fdp->cap.cylinders * fdp->cap.heads * fdp->cap.sectors,
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fdp->cap.cylinders, fdp->cap.heads, fdp->cap.sectors,
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fdp->cap.sector_size);
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ata_prtdev(fdp->device, "%dKB/s,", fdp->cap.transfer_rate / 8);
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printf(" %s\n", ata_mode2str(fdp->device->mode));
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if (fdp->cap.medium_type) {
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ata_prtdev(fdp->device, "Medium: ");
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switch (fdp->cap.medium_type) {
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case MFD_2DD:
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printf("720KB DD disk"); break;
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case MFD_HD_12:
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printf("1.2MB HD disk"); break;
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case MFD_HD_144:
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printf("1.44MB HD disk"); break;
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case MFD_UHD:
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printf("120MB UHD disk"); break;
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default:
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printf("Unknown (0x%x)", fdp->cap.medium_type);
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}
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if (fdp->cap.wp) printf(", writeprotected");
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}
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printf("\n");
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}
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else {
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ata_prtdev(fdp->device, "%luMB <%.40s> [%d/%d/%d] at ata%d-%s %s\n",
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(fdp->cap.cylinders * fdp->cap.heads * fdp->cap.sectors) /
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((1024L * 1024L) / fdp->cap.sector_size),
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fdp->device->param->model,
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fdp->cap.cylinders, fdp->cap.heads, fdp->cap.sectors,
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device_get_unit(fdp->device->channel->dev),
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(fdp->device->unit == ATA_MASTER) ? "master" : "slave",
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ata_mode2str(fdp->device->mode));
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}
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}
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static int
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afdopen(dev_t dev, int flags, int fmt, struct thread *td)
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{
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struct afd_softc *fdp = dev->si_drv1;
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atapi_test_ready(fdp->device);
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if (count_dev(dev) == 1)
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afd_prevent_allow(fdp, 1);
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if (afd_sense(fdp))
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ata_prtdev(fdp->device, "sense media type failed\n");
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fdp->device->flags &= ~ATA_D_MEDIA_CHANGED;
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fdp->disk.d_sectorsize = fdp->cap.sector_size;
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fdp->disk.d_mediasize = (off_t)fdp->cap.sector_size * fdp->cap.sectors *
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fdp->cap.heads * fdp->cap.cylinders;
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fdp->disk.d_fwsectors = fdp->cap.sectors;
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fdp->disk.d_fwheads = fdp->cap.heads;
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return 0;
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}
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static int
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afdclose(dev_t dev, int flags, int fmt, struct thread *td)
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{
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struct afd_softc *fdp = dev->si_drv1;
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if (count_dev(dev) == 1)
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afd_prevent_allow(fdp, 0);
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return 0;
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}
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static int
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afdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
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{
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struct afd_softc *fdp = dev->si_drv1;
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switch (cmd) {
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case CDIOCEJECT:
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if (count_dev(dev) > 1)
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return EBUSY;
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return afd_eject(fdp, 0);
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case CDIOCCLOSE:
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if (count_dev(dev) > 1)
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return 0;
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return afd_eject(fdp, 1);
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default:
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return ENOIOCTL;
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}
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}
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static void
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afdstrategy(struct bio *bp)
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{
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struct afd_softc *fdp = bp->bio_dev->si_drv1;
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int s;
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if (fdp->device->flags & ATA_D_DETACHING) {
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biofinish(bp, NULL, ENXIO);
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return;
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}
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/* if it's a null transfer, return immediatly. */
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if (bp->bio_bcount == 0) {
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bp->bio_resid = 0;
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biodone(bp);
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return;
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}
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s = splbio();
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bioqdisksort(&fdp->queue, bp);
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splx(s);
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ata_start(fdp->device->channel);
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}
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void
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afd_start(struct ata_device *atadev)
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{
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struct afd_softc *fdp = atadev->driver;
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struct bio *bp = bioq_first(&fdp->queue);
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u_int32_t lba;
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u_int16_t count;
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int8_t ccb[16];
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caddr_t data_ptr;
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if (!bp)
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return;
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bioq_remove(&fdp->queue, bp);
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/* should reject all queued entries if media have changed. */
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if (fdp->device->flags & ATA_D_MEDIA_CHANGED) {
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biofinish(bp, NULL, EIO);
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return;
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}
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lba = bp->bio_pblkno;
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count = bp->bio_bcount / fdp->cap.sector_size;
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data_ptr = bp->bio_data;
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bp->bio_resid = bp->bio_bcount;
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bzero(ccb, sizeof(ccb));
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if (bp->bio_cmd == BIO_READ)
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ccb[0] = ATAPI_READ_BIG;
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else
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ccb[0] = ATAPI_WRITE_BIG;
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ccb[2] = lba>>24;
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ccb[3] = lba>>16;
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ccb[4] = lba>>8;
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ccb[5] = lba;
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ccb[7] = count>>8;
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ccb[8] = count;
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devstat_start_transaction(&fdp->stats);
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atapi_queue_cmd(fdp->device, ccb, data_ptr, count * fdp->cap.sector_size,
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(bp->bio_cmd == BIO_READ) ? ATPR_F_READ : 0, 30,
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afd_done, bp);
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}
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static int
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afd_done(struct atapi_request *request)
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{
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struct bio *bp = request->driver;
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struct afd_softc *fdp = request->device->driver;
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if (request->error || (bp->bio_flags & BIO_ERROR)) {
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bp->bio_error = request->error;
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bp->bio_flags |= BIO_ERROR;
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}
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else
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bp->bio_resid = bp->bio_bcount - request->donecount;
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biofinish(bp, &fdp->stats, 0);
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return 0;
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}
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static int
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afd_eject(struct afd_softc *fdp, int close)
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{
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int error;
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if ((error = afd_start_stop(fdp, 0)) == EBUSY) {
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if (!close)
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return 0;
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if ((error = afd_start_stop(fdp, 3)))
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return error;
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return afd_prevent_allow(fdp, 1);
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}
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if (error)
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return error;
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if (close)
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return 0;
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if ((error = afd_prevent_allow(fdp, 0)))
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return error;
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fdp->device->flags |= ATA_D_MEDIA_CHANGED;
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return afd_start_stop(fdp, 2);
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}
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static int
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afd_start_stop(struct afd_softc *fdp, int start)
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{
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int8_t ccb[16] = { ATAPI_START_STOP, 0, 0, 0, start,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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return atapi_queue_cmd(fdp->device, ccb, NULL, 0, 0, 30, NULL, NULL);
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}
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static int
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afd_prevent_allow(struct afd_softc *fdp, int lock)
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{
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int8_t ccb[16] = { ATAPI_PREVENT_ALLOW, 0, 0, 0, lock,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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if (!strncmp(fdp->device->param->model, "IOMEGA Clik!", 12))
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return 0;
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return atapi_queue_cmd(fdp->device, ccb, NULL, 0, 0, 30, NULL, NULL);
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}
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