freebsd-skq/sys/dev/aac/aac_disk.c
Scott Long 03b5fe51bf Collapse sync fib locking into normal i/o locking. The former didn't
protect the registers so it was trivially possible for a sync command and
i/o command to fight each other and confuse the controller.  Make the
sync fib alloc/release functions inline and remove the somewhat worthless
AAC_SYNC_LOCK_FORCE flag.  Thanks to Adil Katchi for helping me to track
this down in RELENG_4.
2004-06-02 18:15:48 +00:00

399 lines
9.1 KiB
C

/*-
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2001 Scott Long
* Copyright (c) 2000 BSDi
* Copyright (c) 2001 Adaptec, Inc.
* 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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_aac.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/aac/aacreg.h>
#include <dev/aac/aac_ioctl.h>
#include <dev/aac/aacvar.h>
/*
* Interface to parent.
*/
static int aac_disk_probe(device_t dev);
static int aac_disk_attach(device_t dev);
static int aac_disk_detach(device_t dev);
/*
* Interface to the device switch.
*/
static disk_open_t aac_disk_open;
static disk_close_t aac_disk_close;
static disk_strategy_t aac_disk_strategy;
static dumper_t aac_disk_dump;
static devclass_t aac_disk_devclass;
static device_method_t aac_disk_methods[] = {
DEVMETHOD(device_probe, aac_disk_probe),
DEVMETHOD(device_attach, aac_disk_attach),
DEVMETHOD(device_detach, aac_disk_detach),
{ 0, 0 }
};
static driver_t aac_disk_driver = {
"aacd",
aac_disk_methods,
sizeof(struct aac_disk)
};
#define AAC_MAXIO 65536
DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
/* sysctl tunables */
static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
SYSCTL_DECL(_hw_aac);
SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RDTUN, &aac_iosize_max, 0,
"Max I/O size per transfer to an array");
/*
* Handle open from generic layer.
*
* This is called by the diskslice code on first open in order to get the
* basic device geometry paramters.
*/
static int
aac_disk_open(struct disk *dp)
{
struct aac_disk *sc;
debug_called(4);
sc = (struct aac_disk *)dp->d_drv1;
if (sc == NULL) {
printf("aac_disk_open: No Softc\n");
return (ENXIO);
}
/* check that the controller is up and running */
if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
printf("Controller Suspended controller state = 0x%x\n",
sc->ad_controller->aac_state);
return(ENXIO);
}
sc->ad_flags |= AAC_DISK_OPEN;
return (0);
}
/*
* Handle last close of the disk device.
*/
static int
aac_disk_close(struct disk *dp)
{
struct aac_disk *sc;
debug_called(4);
sc = (struct aac_disk *)dp->d_drv1;
if (sc == NULL)
return (ENXIO);
sc->ad_flags &= ~AAC_DISK_OPEN;
return (0);
}
/*
* Handle an I/O request.
*/
static void
aac_disk_strategy(struct bio *bp)
{
struct aac_disk *sc;
debug_called(4);
sc = (struct aac_disk *)bp->bio_disk->d_drv1;
/* bogus disk? */
if (sc == NULL) {
bp->bio_flags |= BIO_ERROR;
bp->bio_error = EINVAL;
biodone(bp);
return;
}
/* do-nothing operation? */
if (bp->bio_bcount == 0) {
bp->bio_resid = bp->bio_bcount;
biodone(bp);
return;
}
/* perform accounting */
/* pass the bio to the controller - it can work out who we are */
AAC_LOCK_ACQUIRE(&sc->ad_controller->aac_io_lock);
aac_submit_bio(bp);
AAC_LOCK_RELEASE(&sc->ad_controller->aac_io_lock);
return;
}
/*
* Map the S/G elements for doing a dump.
*
* XXX This does not handle >4GB of RAM. Fixing it is possible except on
* adapters that cannot do 64bit s/g lists.
*/
static void
aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
struct aac_fib *fib;
struct aac_blockwrite *bw;
struct aac_sg_table *sg;
int i;
fib = (struct aac_fib *)arg;
bw = (struct aac_blockwrite *)&fib->data[0];
sg = &bw->SgMap;
if (sg != NULL) {
sg->SgCount = nsegs;
for (i = 0; i < nsegs; i++) {
if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT)
return;
sg->SgEntry[i].SgAddress = segs[i].ds_addr;
sg->SgEntry[i].SgByteCount = segs[i].ds_len;
}
fib->Header.Size = nsegs * sizeof(struct aac_sg_entry);
}
}
/*
* Dump memory out to an array
*
* Send out one command at a time with up to AAC_MAXIO of data.
*/
static int
aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
{
struct aac_disk *ad;
struct aac_softc *sc;
struct aac_fib *fib;
struct aac_blockwrite *bw;
size_t len;
int size;
static bus_dmamap_t dump_datamap;
static int first = 0;
struct disk *dp;
dp = arg;
ad = dp->d_drv1;
if (ad == NULL)
return (EINVAL);
sc= ad->ad_controller;
if (!first) {
first = 1;
if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) {
printf("bus_dmamap_create failed\n");
return (ENOMEM);
}
}
/* Skip aac_alloc_sync_fib(). We don't want to mess with sleep locks */
fib = &sc->aac_common->ac_sync_fib;
bw = (struct aac_blockwrite *)&fib->data[0];
while (length > 0) {
len = (length > AAC_MAXIO) ? AAC_MAXIO : length;
bw->Command = VM_CtBlockWrite;
bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
bw->BlockNumber = offset / AAC_BLOCK_SIZE;
bw->ByteCount = len;
bw->Stable = CUNSTABLE;
/*
* There really isn't any way to recover from errors or
* resource shortages here. Oh well. Because of that, don't
* bother trying to send the command from the callback; there
* is too much required context.
*/
if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual,
len, aac_dump_map_sg, fib, 0) != 0)
return (EIO);
bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
BUS_DMASYNC_PREWRITE);
/* fib->Header.Size is set in aac_dump_map_sg */
size = fib->Header.Size + sizeof(struct aac_blockwrite);
if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) {
printf("Error dumping block 0x%jx\n",
(uintmax_t)physical);
return (EIO);
}
length -= len;
offset += len;
(vm_offset_t)virtual += len;
}
return (0);
}
/*
* Handle completion of an I/O request.
*/
void
aac_biodone(struct bio *bp)
{
struct aac_disk *sc;
debug_called(4);
sc = (struct aac_disk *)bp->bio_disk->d_drv1;
if (bp->bio_flags & BIO_ERROR)
disk_err(bp, "hard error", -1, 1);
biodone(bp);
}
/*
* Stub only.
*/
static int
aac_disk_probe(device_t dev)
{
debug_called(2);
return (0);
}
/*
* Attach a unit to the controller.
*/
static int
aac_disk_attach(device_t dev)
{
struct aac_disk *sc;
debug_called(1);
sc = (struct aac_disk *)device_get_softc(dev);
/* initialise our softc */
sc->ad_controller =
(struct aac_softc *)device_get_softc(device_get_parent(dev));
sc->ad_container = device_get_ivars(dev);
sc->ad_dev = dev;
/*
* require that extended translation be enabled - other drivers read the
* disk!
*/
sc->ad_size = sc->ad_container->co_mntobj.Capacity;
if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
sc->ad_heads = 255;
sc->ad_sectors = 63;
} else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
sc->ad_heads = 128;
sc->ad_sectors = 32;
} else {
sc->ad_heads = 64;
sc->ad_sectors = 32;
}
sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
device_printf(dev, "%uMB (%u sectors)\n",
sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
sc->ad_size);
/* attach a generic disk device to ourselves */
sc->unit = device_get_unit(dev);
sc->ad_disk = disk_alloc();
sc->ad_disk->d_drv1 = sc;
sc->ad_disk->d_name = "aacd";
sc->ad_disk->d_maxsize = aac_iosize_max;
sc->ad_disk->d_open = aac_disk_open;
sc->ad_disk->d_close = aac_disk_close;
sc->ad_disk->d_strategy = aac_disk_strategy;
sc->ad_disk->d_dump = aac_disk_dump;
sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE;
sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE;
sc->ad_disk->d_fwsectors = sc->ad_sectors;
sc->ad_disk->d_fwheads = sc->ad_heads;
sc->ad_disk->d_unit = sc->unit;
disk_create(sc->ad_disk, DISK_VERSION);
return (0);
}
/*
* Disconnect ourselves from the system.
*/
static int
aac_disk_detach(device_t dev)
{
struct aac_disk *sc;
debug_called(2);
sc = (struct aac_disk *)device_get_softc(dev);
if (sc->ad_flags & AAC_DISK_OPEN)
return(EBUSY);
disk_destroy(sc->ad_disk);
return(0);
}