freebsd-dev/sys/dev/ata/atapi-fd.c
Poul-Henning Kamp 21144e3bf1 Remove B_READ, B_WRITE and B_FREEBUF and replace them with a new
field in struct buf: b_iocmd.  The b_iocmd is enforced to have
exactly one bit set.

B_WRITE was bogusly defined as zero giving rise to obvious coding
mistakes.

Also eliminate the redundant struct buf flag B_CALL, it can just
as efficiently be done by comparing b_iodone to NULL.

Should you get a panic or drop into the debugger, complaining about
"b_iocmd", don't continue.  It is likely to write on your disk
where it should have been reading.

This change is a step in the direction towards a stackable BIO capability.

A lot of this patch were machine generated (Thanks to style(9) compliance!)

Vinum users:  Greg has not had time to test this yet, be careful.
2000-03-20 10:44:49 +00:00

433 lines
12 KiB
C

/*-
* Copyright (c) 1998,1999,2000 Søren Schmidt
* 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <sys/devicestat.h>
#include <sys/cdio.h>
#include <dev/ata/ata-all.h>
#include <dev/ata/atapi-all.h>
#include <dev/ata/atapi-fd.h>
/* device structures */
static d_open_t afdopen;
static d_close_t afdclose;
static d_ioctl_t afdioctl;
static d_strategy_t afdstrategy;
static struct cdevsw afd_cdevsw = {
/* open */ afdopen,
/* close */ afdclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ afdioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ afdstrategy,
/* name */ "afd",
/* maj */ 118,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_DISK | D_TRACKCLOSE,
/* bmaj */ 32
};
static struct cdevsw afddisk_cdevsw;
/* prototypes */
static int32_t afd_sense(struct afd_softc *);
static void afd_describe(struct afd_softc *);
static int32_t afd_partial_done(struct atapi_request *);
static int32_t afd_done(struct atapi_request *);
static int32_t afd_eject(struct afd_softc *, int32_t);
static int32_t afd_start_stop(struct afd_softc *, int32_t);
static int32_t afd_prevent_allow(struct afd_softc *, int32_t);
/* internal vars */
static u_int32_t afd_lun_map = 0;
MALLOC_DEFINE(M_AFD, "AFD driver", "ATAPI floppy driver buffers");
int32_t
afdattach(struct atapi_softc *atp)
{
struct afd_softc *fdp;
dev_t dev;
fdp = malloc(sizeof(struct afd_softc), M_AFD, M_NOWAIT);
if (!fdp) {
printf("afd: out of memory\n");
return -1;
}
bzero(fdp, sizeof(struct afd_softc));
bufq_init(&fdp->buf_queue);
fdp->atp = atp;
fdp->lun = ata_get_lun(&afd_lun_map);
if (afd_sense(fdp)) {
free(fdp, M_AFD);
return -1;
}
if (!strncmp(ATA_PARAM(fdp->atp->controller, fdp->atp->unit)->model,
"IOMEGA ZIP", 10))
fdp->transfersize = 64;
devstat_add_entry(&fdp->stats, "afd", fdp->lun, DEV_BSIZE,
DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
DEVSTAT_PRIORITY_WFD);
dev = disk_create(fdp->lun, &fdp->disk, 0, &afd_cdevsw, &afddisk_cdevsw);
dev->si_drv1 = fdp;
dev->si_iosize_max = 252 * DEV_BSIZE;
fdp->dev = dev;
fdp->atp->flags |= ATAPI_F_MEDIA_CHANGED;
fdp->atp->driver = fdp;
if ((fdp->atp->devname = malloc(8, M_AFD, M_NOWAIT)))
sprintf(fdp->atp->devname, "afd%d", fdp->lun);
afd_describe(fdp);
return 0;
}
void
afddetach(struct atapi_softc *atp)
{
struct afd_softc *fdp = atp->driver;
disk_invalidate(&fdp->disk);
disk_destroy(fdp->dev);
devstat_remove_entry(&fdp->stats);
free(fdp->atp->devname, M_AFD);
ata_free_lun(&afd_lun_map, fdp->lun);
free(fdp, M_AFD);
}
static int32_t
afd_sense(struct afd_softc *fdp)
{
int8_t buffer[256];
int8_t ccb[16] = { ATAPI_MODE_SENSE_BIG, 0, ATAPI_REWRITEABLE_CAP_PAGE,
0, 0, 0, 0, sizeof(buffer)>>8, sizeof(buffer) & 0xff,
0, 0, 0, 0, 0, 0, 0 };
int32_t count, error = 0;
bzero(buffer, sizeof(buffer));
/* get drive capabilities, some drives needs this repeated */
for (count = 0 ; count < 5 ; count++) {
if (!(error = atapi_queue_cmd(fdp->atp, ccb, buffer, sizeof(buffer),
ATPR_F_READ, 30, NULL, NULL)))
break;
}
if (error)
return error;
bcopy(buffer, &fdp->header, sizeof(struct afd_header));
bcopy(buffer + sizeof(struct afd_header), &fdp->cap,
sizeof(struct afd_cappage));
if (fdp->cap.page_code != ATAPI_REWRITEABLE_CAP_PAGE)
return 1;
fdp->cap.cylinders = ntohs(fdp->cap.cylinders);
fdp->cap.sector_size = ntohs(fdp->cap.sector_size);
fdp->cap.transfer_rate = ntohs(fdp->cap.transfer_rate);
return 0;
}
static void
afd_describe(struct afd_softc *fdp)
{
if (bootverbose) {
printf("afd%d: <%.40s/%.8s> rewriteable drive at ata%d as %s\n",
fdp->lun, ATA_PARAM(fdp->atp->controller, fdp->atp->unit)->model,
ATA_PARAM(fdp->atp->controller, fdp->atp->unit)->revision,
device_get_unit(fdp->atp->controller->dev),
(fdp->atp->unit == ATA_MASTER) ? "master" : "slave");
printf("afd%d: %luMB (%u sectors), %u cyls, %u heads, %u S/T, %u B/S\n",
fdp->lun,
(fdp->cap.cylinders * fdp->cap.heads * fdp->cap.sectors) /
((1024L * 1024L) / fdp->cap.sector_size),
fdp->cap.cylinders * fdp->cap.heads * fdp->cap.sectors,
fdp->cap.cylinders, fdp->cap.heads, fdp->cap.sectors,
fdp->cap.sector_size);
printf("afd%d: %dKB/s,", fdp->lun, fdp->cap.transfer_rate/8);
if (fdp->transfersize)
printf(" transfer limit %d blks,", fdp->transfersize);
printf(" %s\n", ata_mode2str(fdp->atp->controller->mode[
ATA_DEV(fdp->atp->unit)]));
printf("afd%d: Medium: ", fdp->lun);
switch (fdp->header.medium_type) {
case MFD_2DD:
printf("720KB DD disk"); break;
case MFD_HD_12:
printf("1.2MB HD disk"); break;
case MFD_HD_144:
printf("1.44MB HD disk"); break;
case MFD_UHD:
printf("120MB UHD disk"); break;
default:
printf("Unknown media (0x%x)", fdp->header.medium_type);
}
if (fdp->header.wp) printf(", writeprotected");
printf("\n");
}
else {
printf("afd%d: %luMB <%.40s> [%d/%d/%d] at ata%d-%s using %s\n",
fdp->lun, (fdp->cap.cylinders*fdp->cap.heads*fdp->cap.sectors) /
((1024L * 1024L) / fdp->cap.sector_size),
ATA_PARAM(fdp->atp->controller, fdp->atp->unit)->model,
fdp->cap.cylinders, fdp->cap.heads, fdp->cap.sectors,
device_get_unit(fdp->atp->controller->dev),
(fdp->atp->unit == ATA_MASTER) ? "master" : "slave",
ata_mode2str(fdp->atp->controller->mode[ATA_DEV(fdp->atp->unit)])
);
}
}
static int
afdopen(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
{
struct afd_softc *fdp = dev->si_drv1;
struct disklabel *label = &fdp->disk.d_label;
atapi_test_ready(fdp->atp);
if (count_dev(dev) == 1)
afd_prevent_allow(fdp, 1);
if (afd_sense(fdp))
printf("afd%d: sense media type failed\n", fdp->lun);
fdp->atp->flags &= ~ATAPI_F_MEDIA_CHANGED;
bzero(label, sizeof *label);
label->d_secsize = fdp->cap.sector_size;
label->d_nsectors = fdp->cap.sectors;
label->d_ntracks = fdp->cap.heads;
label->d_ncylinders = fdp->cap.cylinders;
label->d_secpercyl = fdp->cap.sectors * fdp->cap.heads;
label->d_secperunit = label->d_secpercyl * fdp->cap.cylinders;
return 0;
}
static int
afdclose(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
{
struct afd_softc *fdp = dev->si_drv1;
if (count_dev(dev) == 1)
afd_prevent_allow(fdp, 0);
return 0;
}
static int
afdioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
{
struct afd_softc *fdp = dev->si_drv1;
switch (cmd) {
case CDIOCEJECT:
if (count_dev(dev) > 1)
return EBUSY;
return afd_eject(fdp, 0);
case CDIOCCLOSE:
if (count_dev(dev) > 1)
return 0;
return afd_eject(fdp, 1);
default:
return ENOIOCTL;
}
}
static void
afdstrategy(struct buf *bp)
{
struct afd_softc *fdp = bp->b_dev->si_drv1;
int32_t s;
/* if it's a null transfer, return immediatly. */
if (bp->b_bcount == 0) {
bp->b_resid = 0;
biodone(bp);
return;
}
s = splbio();
bufqdisksort(&fdp->buf_queue, bp);
ata_start(fdp->atp->controller);
splx(s);
}
void
afd_start(struct atapi_softc *atp)
{
struct afd_softc *fdp = atp->driver;
struct buf *bp = bufq_first(&fdp->buf_queue);
u_int32_t lba, count;
int8_t ccb[16];
int8_t *data_ptr;
if (!bp)
return;
bufq_remove(&fdp->buf_queue, bp);
/* should reject all queued entries if media have changed. */
if (fdp->atp->flags & ATAPI_F_MEDIA_CHANGED) {
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
biodone(bp);
return;
}
lba = bp->b_pblkno;
count = bp->b_bcount / fdp->cap.sector_size;
data_ptr = bp->b_data;
bp->b_resid = 0;
bzero(ccb, sizeof(ccb));
if (bp->b_iocmd == BIO_READ)
ccb[0] = ATAPI_READ_BIG;
else
ccb[0] = ATAPI_WRITE_BIG;
devstat_start_transaction(&fdp->stats);
while (fdp->transfersize && (count > fdp->transfersize)) {
ccb[2] = lba>>24;
ccb[3] = lba>>16;
ccb[4] = lba>>8;
ccb[5] = lba;
ccb[7] = fdp->transfersize>>8;
ccb[8] = fdp->transfersize;
atapi_queue_cmd(fdp->atp, ccb, data_ptr,
fdp->transfersize * fdp->cap.sector_size,
(bp->b_iocmd == BIO_READ) ? ATPR_F_READ : 0, 30,
afd_partial_done, bp);
count -= fdp->transfersize;
lba += fdp->transfersize;
data_ptr += fdp->transfersize * fdp->cap.sector_size;
}
ccb[2] = lba>>24;
ccb[3] = lba>>16;
ccb[4] = lba>>8;
ccb[5] = lba;
ccb[7] = count>>8;
ccb[8] = count;
atapi_queue_cmd(fdp->atp, ccb, data_ptr, count * fdp->cap.sector_size,
(bp->b_iocmd == BIO_READ) ? ATPR_F_READ : 0, 30, afd_done, bp);
}
static int32_t
afd_partial_done(struct atapi_request *request)
{
struct buf *bp = request->bp;
if (request->error) {
bp->b_error = request->error;
bp->b_flags |= B_ERROR;
}
bp->b_resid += request->bytecount;
return 0;
}
static int32_t
afd_done(struct atapi_request *request)
{
struct buf *bp = request->bp;
struct afd_softc *fdp = request->device->driver;
if (request->error || (bp->b_flags & B_ERROR)) {
bp->b_error = request->error;
bp->b_flags |= B_ERROR;
}
else
bp->b_resid += (bp->b_bcount - request->donecount);
devstat_end_transaction_buf(&fdp->stats, bp);
biodone(bp);
return 0;
}
static int32_t
afd_eject(struct afd_softc *fdp, int32_t close)
{
int32_t error;
if ((error = afd_start_stop(fdp, 0)) == EBUSY) {
if (!close)
return 0;
if ((error = afd_start_stop(fdp, 3)))
return error;
return afd_prevent_allow(fdp, 1);
}
if (error)
return error;
if (close)
return 0;
if ((error = afd_prevent_allow(fdp, 0)))
return error;
fdp->atp->flags |= ATAPI_F_MEDIA_CHANGED;
return afd_start_stop(fdp, 2);
}
static int32_t
afd_start_stop(struct afd_softc *fdp, int32_t start)
{
int8_t ccb[16] = { ATAPI_START_STOP, 0x01, 0, 0, start,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
int32_t error;
error = atapi_queue_cmd(fdp->atp, ccb, NULL, 0, 0, 10, NULL, NULL);
if (error)
return error;
return atapi_wait_ready(fdp->atp, 30);
}
static int32_t
afd_prevent_allow(struct afd_softc *fdp, int32_t lock)
{
int8_t ccb[16] = { ATAPI_PREVENT_ALLOW, 0, 0, 0, lock,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
return atapi_queue_cmd(fdp->atp, ccb, NULL, 0, 0,30, NULL, NULL);
}