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freebsd-skq/sys/dev/ata/ata-pci.c

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/*-
* Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
* 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.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/ata.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/sema.h>
#include <sys/taskqueue.h>
#include <vm/uma.h>
#include <machine/stdarg.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-pci.h>
#include <ata_if.h>
/* local vars */
static MALLOC_DEFINE(M_ATAPCI, "ata_pci", "ATA driver PCI");
/* misc defines */
#define IOMASK 0xfffffffc
#define ATA_PROBE_OK -10
int
ata_legacy(device_t dev)
{
return (((pci_read_config(dev, PCIR_PROGIF, 1)&PCIP_STORAGE_IDE_MASTERDEV)&&
((pci_read_config(dev, PCIR_PROGIF, 1) &
(PCIP_STORAGE_IDE_MODEPRIM | PCIP_STORAGE_IDE_MODESEC)) !=
(PCIP_STORAGE_IDE_MODEPRIM | PCIP_STORAGE_IDE_MODESEC))) ||
(!pci_read_config(dev, PCIR_BAR(0), 4) &&
!pci_read_config(dev, PCIR_BAR(1), 4) &&
!pci_read_config(dev, PCIR_BAR(2), 4) &&
!pci_read_config(dev, PCIR_BAR(3), 4) &&
!pci_read_config(dev, PCIR_BAR(5), 4)));
}
int
ata_pci_probe(device_t dev)
{
if (pci_get_class(dev) != PCIC_STORAGE)
return ENXIO;
/* if this is an AHCI chipset grab it */
if (pci_get_subclass(dev) == PCIS_STORAGE_SATA) {
if (!ata_ahci_ident(dev))
return ATA_PROBE_OK;
}
/* run through the vendor specific drivers */
switch (pci_get_vendor(dev)) {
case ATA_ACARD_ID:
if (!ata_acard_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_ACER_LABS_ID:
if (!ata_ali_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_AMD_ID:
if (!ata_amd_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_ADAPTEC_ID:
if (!ata_adaptec_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_ATI_ID:
if (!ata_ati_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_CYRIX_ID:
if (!ata_cyrix_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_CYPRESS_ID:
if (!ata_cypress_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_HIGHPOINT_ID:
if (!ata_highpoint_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_INTEL_ID:
if (!ata_intel_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_ITE_ID:
if (!ata_ite_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_JMICRON_ID:
if (!ata_jmicron_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_MARVELL_ID:
if (!ata_marvell_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_NATIONAL_ID:
if (!ata_national_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_NETCELL_ID:
if (!ata_netcell_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_NVIDIA_ID:
if (!ata_nvidia_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_PROMISE_ID:
if (!ata_promise_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_SERVERWORKS_ID:
if (!ata_serverworks_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_SILICON_IMAGE_ID:
if (!ata_sii_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_SIS_ID:
if (!ata_sis_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_VIA_ID:
if (!ata_via_ident(dev))
return ATA_PROBE_OK;
break;
case ATA_CENATEK_ID:
if (pci_get_devid(dev) == ATA_CENATEK_ROCKET) {
ata_generic_ident(dev);
device_set_desc(dev, "Cenatek Rocket Drive controller");
return ATA_PROBE_OK;
}
break;
case ATA_MICRON_ID:
if (pci_get_devid(dev) == ATA_MICRON_RZ1000 ||
pci_get_devid(dev) == ATA_MICRON_RZ1001) {
ata_generic_ident(dev);
device_set_desc(dev,
"RZ 100? ATA controller !WARNING! data loss/corruption risk");
return ATA_PROBE_OK;
}
break;
}
/* unknown chipset, try generic DMA if it seems possible */
if (pci_get_subclass(dev) == PCIS_STORAGE_IDE) {
if (!ata_generic_ident(dev))
return ATA_PROBE_OK;
}
return ENXIO;
}
int
ata_pci_attach(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(dev);
u_int32_t cmd;
int unit;
/* do chipset specific setups only needed once */
if (ata_legacy(dev) || pci_read_config(dev, PCIR_BAR(2), 4) & IOMASK)
ctlr->channels = 2;
else
ctlr->channels = 1;
ctlr->allocate = ata_pci_allocate;
ctlr->dmainit = ata_pci_dmainit;
ctlr->dev = dev;
/* if needed try to enable busmastering */
cmd = pci_read_config(dev, PCIR_COMMAND, 2);
if (!(cmd & PCIM_CMD_BUSMASTEREN)) {
pci_write_config(dev, PCIR_COMMAND, cmd | PCIM_CMD_BUSMASTEREN, 2);
cmd = pci_read_config(dev, PCIR_COMMAND, 2);
}
/* if busmastering mode "stuck" use it */
if ((cmd & PCIM_CMD_BUSMASTEREN) == PCIM_CMD_BUSMASTEREN) {
ctlr->r_type1 = SYS_RES_IOPORT;
ctlr->r_rid1 = ATA_BMADDR_RID;
ctlr->r_res1 = bus_alloc_resource_any(dev, ctlr->r_type1, &ctlr->r_rid1,
RF_ACTIVE);
}
if (ctlr->chipinit(dev))
return ENXIO;
/* attach all channels on this controller */
for (unit = 0; unit < ctlr->channels; unit++) {
if ((unit == 0 || unit == 1) && ata_legacy(dev)) {
device_add_child(dev, "ata", unit);
continue;
}
device_add_child(dev, "ata", devclass_find_free_unit(ata_devclass, 2));
}
bus_generic_attach(dev);
return 0;
}
int
ata_pci_detach(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(dev);
device_t *children;
int nchildren, i;
/* detach & delete all children */
if (!device_get_children(dev, &children, &nchildren)) {
for (i = 0; i < nchildren; i++)
device_delete_child(dev, children[i]);
free(children, M_TEMP);
}
if (ctlr->r_irq) {
bus_teardown_intr(dev, ctlr->r_irq, ctlr->handle);
bus_release_resource(dev, SYS_RES_IRQ, ATA_IRQ_RID, ctlr->r_irq);
}
if (ctlr->r_res2)
bus_release_resource(dev, ctlr->r_type2, ctlr->r_rid2, ctlr->r_res2);
if (ctlr->r_res1)
bus_release_resource(dev, ctlr->r_type1, ctlr->r_rid1, ctlr->r_res1);
return 0;
}
struct resource *
ata_pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct ata_pci_controller *controller = device_get_softc(dev);
int unit = ((struct ata_channel *)device_get_softc(child))->unit;
struct resource *res = NULL;
int myrid;
if (type == SYS_RES_IOPORT) {
switch (*rid) {
case ATA_IOADDR_RID:
if (ata_legacy(dev)) {
start = (unit ? ATA_SECONDARY : ATA_PRIMARY);
count = ATA_IOSIZE;
end = start + count - 1;
}
myrid = PCIR_BAR(0) + (unit << 3);
res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
SYS_RES_IOPORT, &myrid,
start, end, count, flags);
break;
case ATA_CTLADDR_RID:
if (ata_legacy(dev)) {
start = (unit ? ATA_SECONDARY : ATA_PRIMARY) + ATA_CTLOFFSET;
count = ATA_CTLIOSIZE;
end = start + count - 1;
}
myrid = PCIR_BAR(1) + (unit << 3);
res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
SYS_RES_IOPORT, &myrid,
start, end, count, flags);
break;
}
}
if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) {
if (ata_legacy(dev)) {
int irq = (unit == 0 ? 14 : 15);
res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
SYS_RES_IRQ, rid, irq, irq, 1, flags);
}
else
res = controller->r_irq;
}
return res;
}
int
ata_pci_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
int unit = ((struct ata_channel *)device_get_softc(child))->unit;
if (type == SYS_RES_IOPORT) {
switch (rid) {
case ATA_IOADDR_RID:
return BUS_RELEASE_RESOURCE(device_get_parent(dev), dev,
SYS_RES_IOPORT,
PCIR_BAR(0) + (unit << 3), r);
break;
case ATA_CTLADDR_RID:
return BUS_RELEASE_RESOURCE(device_get_parent(dev), dev,
SYS_RES_IOPORT,
PCIR_BAR(1) + (unit << 3), r);
break;
default:
return ENOENT;
}
}
if (type == SYS_RES_IRQ) {
if (rid != ATA_IRQ_RID)
return ENOENT;
if (ata_legacy(dev)) {
return BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
SYS_RES_IRQ, rid, r);
}
else
return 0;
}
return EINVAL;
}
int
ata_pci_setup_intr(device_t dev, device_t child, struct resource *irq,
int flags, driver_filter_t *filter, driver_intr_t *function,
void *argument, void **cookiep)
{
if (ata_legacy(dev)) {
return BUS_SETUP_INTR(device_get_parent(dev), child, irq,
flags, filter, function, argument, cookiep);
}
else {
struct ata_pci_controller *controller = device_get_softc(dev);
int unit = ((struct ata_channel *)device_get_softc(child))->unit;
if (filter != NULL) {
printf("ata-pci.c: we cannot use a filter here\n");
return (EINVAL);
}
controller->interrupt[unit].function = function;
controller->interrupt[unit].argument = argument;
*cookiep = controller;
return 0;
}
}
int
ata_pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
void *cookie)
{
if (ata_legacy(dev)) {
return BUS_TEARDOWN_INTR(device_get_parent(dev), child, irq, cookie);
}
else {
struct ata_pci_controller *controller = device_get_softc(dev);
int unit = ((struct ata_channel *)device_get_softc(child))->unit;
controller->interrupt[unit].function = NULL;
controller->interrupt[unit].argument = NULL;
return 0;
}
}
int
ata_pci_allocate(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
struct resource *io = NULL, *ctlio = NULL;
int i, rid;
rid = ATA_IOADDR_RID;
if (!(io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE)))
return ENXIO;
rid = ATA_CTLADDR_RID;
if (!(ctlio = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,RF_ACTIVE))){
bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io);
return ENXIO;
}
for (i = ATA_DATA; i <= ATA_COMMAND; i ++) {
ch->r_io[i].res = io;
ch->r_io[i].offset = i;
}
ch->r_io[ATA_CONTROL].res = ctlio;
ch->r_io[ATA_CONTROL].offset = ata_legacy(device_get_parent(dev)) ? 0 : 2;
ch->r_io[ATA_IDX_ADDR].res = io;
ata_default_registers(dev);
if (ctlr->r_res1) {
for (i = ATA_BMCMD_PORT; i <= ATA_BMDTP_PORT; i++) {
ch->r_io[i].res = ctlr->r_res1;
ch->r_io[i].offset = (i - ATA_BMCMD_PORT) + (ch->unit*ATA_BMIOSIZE);
}
}
ata_pci_hw(dev);
return 0;
}
int
ata_pci_status(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
if ((dumping || !ata_legacy(device_get_parent(dev))) &&
((ch->flags & ATA_ALWAYS_DMASTAT) ||
(ch->dma.flags & ATA_DMA_ACTIVE))) {
int bmstat = ATA_IDX_INB(ch, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
if ((bmstat & (ATA_BMSTAT_ACTIVE | ATA_BMSTAT_INTERRUPT)) !=
ATA_BMSTAT_INTERRUPT)
return 0;
ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, bmstat & ~ATA_BMSTAT_ERROR);
DELAY(1);
}
if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
DELAY(100);
if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY)
return 0;
}
return 1;
}
void
ata_pci_hw(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
ata_generic_hw(dev);
ch->hw.status = ata_pci_status;
}
static int
ata_pci_dmastart(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(request->parent);
ATA_DEBUG_RQ(request, "dmastart");
ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, (ATA_IDX_INB(ch, ATA_BMSTAT_PORT) |
(ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR)));
ATA_IDX_OUTL(ch, ATA_BMDTP_PORT, request->dma->sg_bus);
ch->dma.flags |= ATA_DMA_ACTIVE;
ATA_IDX_OUTB(ch, ATA_BMCMD_PORT,
(ATA_IDX_INB(ch, ATA_BMCMD_PORT) & ~ATA_BMCMD_WRITE_READ) |
((request->flags & ATA_R_READ) ? ATA_BMCMD_WRITE_READ : 0)|
ATA_BMCMD_START_STOP);
return 0;
}
static int
ata_pci_dmastop(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(request->parent);
int error;
ATA_DEBUG_RQ(request, "dmastop");
ATA_IDX_OUTB(ch, ATA_BMCMD_PORT,
ATA_IDX_INB(ch, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
ch->dma.flags &= ~ATA_DMA_ACTIVE;
error = ATA_IDX_INB(ch, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR);
return error;
}
static void
ata_pci_dmareset(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
struct ata_request *request;
ATA_IDX_OUTB(ch, ATA_BMCMD_PORT,
ATA_IDX_INB(ch, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
ch->dma.flags &= ~ATA_DMA_ACTIVE;
ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR);
if ((request = ch->running)) {
device_printf(request->dev, "DMA reset calling unload\n");
ch->dma.unload(request);
}
}
void
ata_pci_dmainit(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
ata_dmainit(dev);
ch->dma.start = ata_pci_dmastart;
ch->dma.stop = ata_pci_dmastop;
ch->dma.reset = ata_pci_dmareset;
}
char *
ata_pcivendor2str(device_t dev)
{
switch (pci_get_vendor(dev)) {
case ATA_ACARD_ID: return "Acard";
case ATA_ACER_LABS_ID: return "AcerLabs";
case ATA_AMD_ID: return "AMD";
case ATA_ADAPTEC_ID: return "Adaptec";
case ATA_ATI_ID: return "ATI";
case ATA_CYRIX_ID: return "Cyrix";
case ATA_CYPRESS_ID: return "Cypress";
case ATA_HIGHPOINT_ID: return "HighPoint";
case ATA_INTEL_ID: return "Intel";
case ATA_ITE_ID: return "ITE";
case ATA_JMICRON_ID: return "JMicron";
case ATA_MARVELL_ID: return "Marvell";
case ATA_NATIONAL_ID: return "National";
case ATA_NETCELL_ID: return "Netcell";
case ATA_NVIDIA_ID: return "nVidia";
case ATA_PROMISE_ID: return "Promise";
case ATA_SERVERWORKS_ID: return "ServerWorks";
case ATA_SILICON_IMAGE_ID: return "SiI";
case ATA_SIS_ID: return "SiS";
case ATA_VIA_ID: return "VIA";
case ATA_CENATEK_ID: return "Cenatek";
case ATA_MICRON_ID: return "Micron";
default: return "Generic";
}
}
static device_method_t ata_pci_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ata_pci_probe),
DEVMETHOD(device_attach, ata_pci_attach),
DEVMETHOD(device_detach, ata_pci_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* bus methods */
DEVMETHOD(bus_alloc_resource, ata_pci_alloc_resource),
DEVMETHOD(bus_release_resource, ata_pci_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, ata_pci_setup_intr),
DEVMETHOD(bus_teardown_intr, ata_pci_teardown_intr),
{ 0, 0 }
};
devclass_t atapci_devclass;
static driver_t ata_pci_driver = {
"atapci",
ata_pci_methods,
sizeof(struct ata_pci_controller),
};
DRIVER_MODULE(atapci, pci, ata_pci_driver, atapci_devclass, 0, 0);
MODULE_VERSION(atapci, 1);
MODULE_DEPEND(atapci, ata, 1, 1, 1);
static int
ata_pcichannel_probe(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
device_t *children;
int count, i;
char buffer[32];
/* take care of green memory */
bzero(ch, sizeof(struct ata_channel));
/* find channel number on this controller */
device_get_children(device_get_parent(dev), &children, &count);
for (i = 0; i < count; i++) {
if (children[i] == dev)
ch->unit = i;
}
free(children, M_TEMP);
sprintf(buffer, "ATA channel %d", ch->unit);
device_set_desc_copy(dev, buffer);
return ata_probe(dev);
}
static int
ata_pcichannel_attach(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
int error;
if (ctlr->dmainit)
ctlr->dmainit(dev);
if ((error = ctlr->allocate(dev)))
return error;
return ata_attach(dev);
}
static int
ata_pcichannel_detach(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
int error;
if ((error = ata_detach(dev)))
return error;
ch->dma.free(dev);
/* XXX SOS free resources for io and ctlio ?? */
return 0;
}
static int
ata_pcichannel_locking(device_t dev, int mode)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
if (ctlr->locking)
return ctlr->locking(dev, mode);
else
return ch->unit;
}
static void
ata_pcichannel_reset(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
/* if DMA engine present reset it */
if (ch->dma.reset)
ch->dma.reset(dev);
/* reset the controller HW */
if (ctlr->reset)
ctlr->reset(dev);
else
ata_generic_reset(dev);
}
static void
ata_pcichannel_setmode(device_t parent, device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(GRANDPARENT(dev));
struct ata_device *atadev = device_get_softc(dev);
int mode = atadev->mode;
ctlr->setmode(dev, ATA_PIO_MAX);
if (mode >= ATA_DMA)
ctlr->setmode(dev, mode);
}
static device_method_t ata_pcichannel_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ata_pcichannel_probe),
DEVMETHOD(device_attach, ata_pcichannel_attach),
DEVMETHOD(device_detach, ata_pcichannel_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, ata_suspend),
DEVMETHOD(device_resume, ata_resume),
/* ATA methods */
DEVMETHOD(ata_setmode, ata_pcichannel_setmode),
DEVMETHOD(ata_locking, ata_pcichannel_locking),
DEVMETHOD(ata_reset, ata_pcichannel_reset),
{ 0, 0 }
};
driver_t ata_pcichannel_driver = {
"ata",
ata_pcichannel_methods,
sizeof(struct ata_channel),
};
DRIVER_MODULE(ata, atapci, ata_pcichannel_driver, ata_devclass, 0, 0);
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