freebsd-dev/sys/dev/aac/aac_disk.c
Marius Strobl da4882c200 - Make tables, device ID strings etc const. This includes #ifdef'ing 0
aac_command_status_table, which is actually unused since r111532.
  While at it, make aac_if a pointer to the now const interface tables
  instead of copying them over to the softc (this alone already reduces the
  size of aac.ko on amd64 by ~1 KiB).
- Remove redundant softc members.
- Use DEVMETHOD_END.
- Use NULL instead of 0 for pointers.
- Remove redundant bzero(9)'ing of the softc.
- Use pci_enable_busmaster(9) instead of duplicating it.
- Remove redundant checking for PCIM_CMD_MEMEN (resource allocation will
  just fail).
- Canonicalize the error messages in case of resource allocation failures.
- Add support for using MSI instead of INTx, controllable via the tunable
  hw.aac.enable_msi (defaulting to on).

MFC after:	1 month
2013-03-01 19:55:10 +00:00

436 lines
10 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/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 <sys/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),
DEVMETHOD_END
};
static driver_t aac_disk_driver = {
"aacd",
aac_disk_methods,
sizeof(struct aac_disk)
};
DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, NULL, NULL);
/*
* 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;
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
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) {
device_printf(sc->ad_controller->aac_dev,
"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;
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
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;
sc = (struct aac_disk *)bp->bio_disk->d_drv1;
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
/* 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 */
mtx_lock(&sc->ad_controller->aac_io_lock);
aac_submit_bio(bp);
mtx_unlock(&sc->ad_controller->aac_io_lock);
return;
}
/*
* Map the S/G elements for doing a dump.
*/
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);
}
}
/*
* Map the S/G elements for doing a dump on 64-bit capable devices.
*/
static void
aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
struct aac_fib *fib;
struct aac_blockwrite64 *bw;
struct aac_sg_table64 *sg;
int i;
fib = (struct aac_fib *)arg;
bw = (struct aac_blockwrite64 *)&fib->data[0];
sg = &bw->SgMap64;
if (sg != NULL) {
sg->SgCount = nsegs;
for (i = 0; i < nsegs; i++) {
sg->SgEntry64[i].SgAddress = segs[i].ds_addr;
sg->SgEntry64[i].SgByteCount = segs[i].ds_len;
}
fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64);
}
}
/*
* Dump memory out to an array
*
* Send out one command at a time with up to 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;
size_t len, maxio;
int size;
static bus_dmamap_t dump_datamap;
static int first = 0;
struct disk *dp;
bus_dmamap_callback_t *callback;
u_int32_t command;
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)) {
device_printf(sc->aac_dev,
"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;
while (length > 0) {
maxio = sc->aac_max_sectors << 9;
len = (length > maxio) ? maxio : length;
if ((sc->flags & AAC_FLAGS_SG_64BIT) == 0) {
struct aac_blockwrite *bw;
bw = (struct aac_blockwrite *)&fib->data[0];
bw->Command = VM_CtBlockWrite;
bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
bw->BlockNumber = offset / AAC_BLOCK_SIZE;
bw->ByteCount = len;
bw->Stable = CUNSTABLE;
command = ContainerCommand;
callback = aac_dump_map_sg;
size = sizeof(struct aac_blockwrite);
} else {
struct aac_blockwrite64 *bw;
bw = (struct aac_blockwrite64 *)&fib->data[0];
bw->Command = VM_CtHostWrite64;
bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
bw->BlockNumber = offset / AAC_BLOCK_SIZE;
bw->SectorCount = len / AAC_BLOCK_SIZE;
bw->Pad = 0;
bw->Flags = 0;
command = ContainerCommand64;
callback = aac_dump_map_sg64;
size = sizeof(struct aac_blockwrite64);
}
/*
* 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, callback, fib, BUS_DMA_NOWAIT) != 0)
return (ENOMEM);
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;
if (aac_sync_fib(sc, command, 0, fib, size)) {
device_printf(sc->aac_dev,
"Error dumping block 0x%jx\n",
(uintmax_t)physical);
return (EIO);
}
bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap);
length -= len;
offset += len;
virtual = (uint8_t *)virtual + len;
}
return (0);
}
/*
* Handle completion of an I/O request.
*/
void
aac_biodone(struct bio *bp)
{
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
if (bp->bio_flags & BIO_ERROR) {
bp->bio_resid = bp->bio_bcount;
disk_err(bp, "hard error", -1, 1);
}
biodone(bp);
}
/*
* Stub only.
*/
static int
aac_disk_probe(device_t dev)
{
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
return (0);
}
/*
* Attach a unit to the controller.
*/
static int
aac_disk_attach(device_t dev)
{
struct aac_disk *sc;
sc = (struct aac_disk *)device_get_softc(dev);
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
/* 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_controller->flags & AAC_FLAGS_LBA_64BIT)
sc->ad_size += (u_int64_t)
sc->ad_container->co_mntobj.CapacityHigh << 32;
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, "%juMB (%ju sectors)\n",
(intmax_t)sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
(intmax_t)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 = sc->ad_controller->aac_max_sectors << 9;
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;
sc = (struct aac_disk *)device_get_softc(dev);
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
if (sc->ad_flags & AAC_DISK_OPEN)
return(EBUSY);
disk_destroy(sc->ad_disk);
return(0);
}