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freebsd-nq/sys/dev/ata/ata-disk.c

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/*-
* 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 "apm.h"
#include "opt_global.h"
#include "opt_ata.h"
#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/cons.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <machine/clock.h>
#include <machine/md_var.h>
#if NAPM > 0
#include <machine/apm_bios.h>
#endif
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-disk.h>
static d_open_t adopen;
static d_strategy_t adstrategy;
static d_dump_t addump;
static struct cdevsw ad_cdevsw = {
/* open */ adopen,
/* close */ nullclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ noioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ adstrategy,
/* name */ "ad",
/* maj */ 116,
/* dump */ addump,
/* psize */ nopsize,
/* flags */ D_DISK,
/* bmaj */ 30,
};
static struct cdevsw addisk_cdevsw;
static struct cdevsw fakewd_cdevsw;
static struct cdevsw fakewddisk_cdevsw;
/* prototypes */
static void ad_attach(void *);
static int32_t ad_getparam(struct ad_softc *);
static void ad_start(struct ad_softc *);
static void ad_timeout(struct ad_request *);
static int32_t ad_version(u_int16_t);
static void ad_drvinit(void);
/* internal vars */
static struct intr_config_hook *ad_attach_hook;
MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
/* defines */
#define AD_MAX_RETRIES 3
static __inline int
apiomode(struct ata_params *ap)
{
if (ap->atavalid & ATA_FLAG_64_70) {
if (ap->apiomodes & 2) return 4;
if (ap->apiomodes & 1) return 3;
}
return -1;
}
static __inline int
wdmamode(struct ata_params *ap)
{
if (ap->atavalid & ATA_FLAG_64_70) {
if (ap->wdmamodes & 4) return 2;
if (ap->wdmamodes & 2) return 1;
if (ap->wdmamodes & 1) return 0;
}
return -1;
}
static __inline int
udmamode(struct ata_params *ap)
{
if (ap->atavalid & ATA_FLAG_88) {
if (ap->udmamodes & 0x10) return (ap->cblid ? 4 : 2);
if (ap->udmamodes & 0x08) return (ap->cblid ? 3 : 2);
if (ap->udmamodes & 0x04) return 2;
if (ap->udmamodes & 0x02) return 1;
if (ap->udmamodes & 0x01) return 0;
}
return -1;
}
static void
ad_attach(void *notused)
{
struct ad_softc *adp;
int32_t ctlr, dev, secsperint;
int8_t model_buf[40+1];
int8_t revision_buf[8+1];
dev_t dev1;
static int32_t adnlun = 0;
/* now, run through atadevices and look for ATA disks */
for (ctlr=0; ctlr<MAXATA; ctlr++) {
if (!atadevices[ctlr]) continue;
for (dev=0; dev<2; dev++) {
if (atadevices[ctlr]->devices &
(dev ? ATA_ATA_SLAVE : ATA_ATA_MASTER)) {
#ifdef ATA_STATIC_ID
adnlun = dev + ctlr * 2;
#endif
if (!(adp = malloc(sizeof(struct ad_softc),
M_AD, M_NOWAIT))) {
printf("ad%d: failed to allocate driver storage\n", adnlun);
continue;
}
bzero(adp, sizeof(struct ad_softc));
adp->controller = atadevices[ctlr];
adp->unit = (dev == 0) ? ATA_MASTER : ATA_SLAVE;
adp->lun = adnlun++;
if (ad_getparam(adp)) {
free(adp, M_AD);
continue;
}
adp->controller->dev_softc[(adp->unit==ATA_MASTER)?0:1] = adp;
adp->heads = adp->ata_parm->heads;
adp->sectors = adp->ata_parm->sectors;
adp->total_secs =
adp->ata_parm->cylinders * adp->heads * adp->sectors;
if (adp->ata_parm->cylinders == 16383 &&
adp->total_secs < adp->ata_parm->lbasize) {
adp->total_secs = adp->ata_parm->lbasize;
}
if (adp->ata_parm->atavalid & ATA_FLAG_54_58 &&
adp->ata_parm->lbasize)
adp->flags |= AD_F_LBA_ENABLED;
/* use multiple sectors/interrupt if device supports it */
adp->transfersize = DEV_BSIZE;
secsperint = max(1, min(adp->ata_parm->nsecperint, 16));
if (!ata_command(adp->controller, adp->unit, ATA_C_SET_MULTI,
0, 0, 0, secsperint, 0, ATA_WAIT_INTR) &&
ata_wait(adp->controller, adp->unit, ATA_S_READY) >= 0)
adp->transfersize *= secsperint;
/* enable read/write cacheing if not default on device */
if (ata_command(adp->controller, adp->unit, ATA_C_SETFEATURES,
0, 0, 0, 0, ATA_C_F_ENAB_RCACHE, ATA_WAIT_INTR))
printf("ad%d: enabling readahead cache failed\n", adp->lun);
if (ata_command(adp->controller, adp->unit, ATA_C_SETFEATURES,
0, 0, 0, 0, ATA_C_F_ENAB_WCACHE, ATA_WAIT_INTR))
printf("ad%d: enabling write cache failed\n", adp->lun);
/* use DMA if drive & controller supports it */
if (!ata_dmainit(adp->controller, adp->unit,
apiomode(adp->ata_parm),
wdmamode(adp->ata_parm),
udmamode(adp->ata_parm)))
adp->flags |= AD_F_DMA_ENABLED;
/* use tagged queueing if supported (not yet) */
if ((adp->num_tags = (adp->ata_parm->queuelen & 0x1f) + 1))
adp->flags |= AD_F_TAG_ENABLED;
bpack(adp->ata_parm->model, model_buf, sizeof(model_buf));
bpack(adp->ata_parm->revision, revision_buf,
sizeof(revision_buf));
if (bootverbose)
printf("ad%d: piomode=%d dmamode=%d udmamode=%d cblid=%d\n",
adp->lun, apiomode(adp->ata_parm),
wdmamode(adp->ata_parm), udmamode(adp->ata_parm),
adp->ata_parm->cblid);
printf("ad%d: <%s/%s> ATA-%d disk at ata%d as %s\n",
adp->lun, model_buf, revision_buf,
ad_version(adp->ata_parm->versmajor), ctlr,
(adp->unit == ATA_MASTER) ? "master" : "slave ");
printf("ad%d: %luMB (%u sectors), "
"%u cyls, %u heads, %u S/T, %u B/S\n",
adp->lun, adp->total_secs / ((1024L * 1024L)/DEV_BSIZE),
adp->total_secs,
adp->total_secs / (adp->heads * adp->sectors),
adp->heads, adp->sectors, DEV_BSIZE);
printf("ad%d: %d secs/int, %d depth queue, %s\n",
adp->lun, adp->transfersize / DEV_BSIZE, adp->num_tags,
ata_mode2str(adp->controller->mode[
(adp->unit == ATA_MASTER) ? 0 : 1]));
devstat_add_entry(&adp->stats, "ad", adp->lun, DEV_BSIZE,
DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
DEVSTAT_PRIORITY_DISK);
dev1 = disk_create(adp->lun, &adp->disk, 0, &ad_cdevsw,
&addisk_cdevsw);
dev1->si_drv1 = adp;
dev1->si_iosize_max = 256 * DEV_BSIZE;
dev1 = disk_create(adp->lun, &adp->disk, 0, &fakewd_cdevsw,
&fakewddisk_cdevsw);
dev1->si_drv1 = adp;
dev1->si_iosize_max = 256 * DEV_BSIZE;
bufq_init(&adp->queue);
}
}
}
config_intrhook_disestablish(ad_attach_hook);
}
static int32_t
ad_getparam(struct ad_softc *adp)
{
struct ata_params *ata_parm;
int8_t buffer[DEV_BSIZE];
/* select drive */
outb(adp->controller->ioaddr + ATA_DRIVE, ATA_D_IBM | adp->unit);
DELAY(1);
if (ata_command(adp->controller, adp->unit, ATA_C_ATA_IDENTIFY,
0, 0, 0, 0, 0, ATA_WAIT_INTR))
return -1;
if (ata_wait(adp->controller, adp->unit,
ATA_S_READY | ATA_S_DSC | ATA_S_DRQ))
return -1;
insw(adp->controller->ioaddr + ATA_DATA, buffer,
sizeof(buffer)/sizeof(int16_t));
ata_parm = malloc(sizeof(struct ata_params), M_AD, M_NOWAIT);
if (!ata_parm)
return -1;
bcopy(buffer, ata_parm, sizeof(struct ata_params));
bswap(ata_parm->model, sizeof(ata_parm->model));
btrim(ata_parm->model, sizeof(ata_parm->model));
bswap(ata_parm->revision, sizeof(ata_parm->revision));
btrim(ata_parm->revision, sizeof(ata_parm->revision));
adp->ata_parm = ata_parm;
return 0;
}
static int
adopen(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
{
struct ad_softc *adp = dev->si_drv1;
struct disklabel *dl;
dl = &adp->disk.d_label;
bzero(dl, sizeof *dl);
dl->d_secsize = DEV_BSIZE;
dl->d_nsectors = adp->sectors;
dl->d_ntracks = adp->heads;
dl->d_ncylinders = adp->total_secs / (adp->heads * adp->sectors);
dl->d_secpercyl = adp->sectors * adp->heads;
dl->d_secperunit = adp->total_secs;
return 0;
}
static void
adstrategy(struct buf *bp)
{
struct ad_softc *adp = 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(&adp->queue, bp);
ad_start(adp);
splx(s);
}
int
addump(dev_t dev)
{
struct ad_softc *adp = dev->si_drv1;
struct ad_request request;
u_int count, blkno, secsize;
vm_offset_t addr = 0;
int error;
if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize)))
return error;
if (!adp)
return ENXIO;
ata_reinit(adp->controller);
adp->flags &= ~AD_F_DMA_ENABLED;
while (count > 0) {
DELAY(1000);
if (is_physical_memory(addr))
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(addr), VM_PROT_READ, TRUE);
else
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(0), VM_PROT_READ, TRUE);
bzero(&request, sizeof(struct ad_request));
request.device = adp;
request.blockaddr = blkno;
request.bytecount = PAGE_SIZE;
request.data = CADDR1;
while (request.bytecount > 0) {
ad_transfer(&request);
if (request.flags & AR_F_ERROR)
return EIO;
request.donecount += request.currentsize;
DELAY(20);
}
if (addr % (1024 * 1024) == 0) {
#ifdef HW_WDOG
if (wdog_tickler)
(*wdog_tickler)();
#endif
printf("%ld ", (long)(count * DEV_BSIZE) / (1024 * 1024));
}
blkno += howmany(PAGE_SIZE, secsize);
count -= howmany(PAGE_SIZE, secsize);
addr += PAGE_SIZE;
if (cncheckc() != -1)
return EINTR;
}
if (ata_wait(adp->controller, adp->unit, ATA_S_READY | ATA_S_DSC) < 0)
printf("addump: timeout waiting for final ready\n");
return 0;
}
static void
ad_start(struct ad_softc *adp)
{
struct buf *bp = bufq_first(&adp->queue);
struct ad_request *request;
if (!bp)
return;
if (!(request = malloc(sizeof(struct ad_request), M_AD, M_NOWAIT))) {
printf("ad_start: out of memory\n");
return;
}
/* setup request */
bzero(request, sizeof(struct ad_request));
request->device = adp;
request->bp = bp;
request->blockaddr = bp->b_pblkno;
request->bytecount = bp->b_bcount;
request->data = bp->b_data;
request->flags = (bp->b_flags & B_READ) ? AR_F_READ : 0;
/* remove from drive queue */
bufq_remove(&adp->queue, bp);
/* link onto controller queue */
TAILQ_INSERT_TAIL(&adp->controller->ata_queue, request, chain);
/* try to start controller */
if (adp->controller->active == ATA_IDLE)
ata_start(adp->controller);
}
void
ad_transfer(struct ad_request *request)
{
struct ad_softc *adp;
u_int32_t blkno, secsprcyl;
u_int32_t cylinder, head, sector, count, cmd;
/* get request params */
adp = request->device;
/* calculate transfer details */
blkno = request->blockaddr + (request->donecount / DEV_BSIZE);
if (request->donecount == 0) {
/* start timeout for this transfer */
if (panicstr)
request->timeout_handle.callout = NULL;
else
request->timeout_handle =
timeout((timeout_t*)ad_timeout, request, 10 * hz);
/* setup transfer parameters */
count = howmany(request->bytecount, DEV_BSIZE);
if (count > 256) {
count = 256;
printf("ad_transfer: count=%d not supported\n", count);
}
if (adp->flags & AD_F_LBA_ENABLED) {
sector = (blkno >> 0) & 0xff;
cylinder = (blkno >> 8) & 0xffff;
head = ((blkno >> 24) & 0xf) | ATA_D_LBA;
}
else {
secsprcyl = adp->sectors * adp->heads;
cylinder = blkno / secsprcyl;
head = (blkno % secsprcyl) / adp->sectors;
sector = (blkno % adp->sectors) + 1;
}
/* setup first transfer length */
request->currentsize = min(request->bytecount, adp->transfersize);
devstat_start_transaction(&adp->stats);
/* does this drive & transfer work with DMA ? */
request->flags &= ~AR_F_DMA_USED;
if ((adp->flags & AD_F_DMA_ENABLED) &&
!ata_dmasetup(adp->controller, adp->unit,
(void *)request->data, request->bytecount,
(request->flags & AR_F_READ))) {
request->flags |= AR_F_DMA_USED;
cmd = request->flags & AR_F_READ ? ATA_C_READ_DMA : ATA_C_WRITE_DMA;
request->currentsize = request->bytecount;
}
/* does this drive support multi sector transfers ? */
else if (request->currentsize > DEV_BSIZE)
cmd = request->flags & AR_F_READ?ATA_C_READ_MULTI:ATA_C_WRITE_MULTI;
/* just plain old single sector transfer */
else
cmd = request->flags & AR_F_READ ? ATA_C_READ : ATA_C_WRITE;
if (ata_command(adp->controller, adp->unit, cmd,
cylinder, head, sector, count, 0, ATA_IMMEDIATE))
printf("ad%d: wouldn't take transfer command\n", adp->lun);
}
/* if this is a DMA transaction start it, return and wait for interrupt */
if (request->flags & AR_F_DMA_USED) {
ata_dmastart(adp->controller);
return;
}
/* calculate this transfer length */
request->currentsize = min(request->bytecount, adp->transfersize);
/* if this is a PIO read operation, return and wait for interrupt */
if (request->flags & AR_F_READ) {
return;
}
/* ready to write PIO data ? */
if (ata_wait(adp->controller, adp->unit,
(ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0)
printf("ad_transfer: timeout waiting for DRQ");
/* output the data */
#ifdef ATA_16BIT_ONLY
outsw(adp->controller->ioaddr + ATA_DATA,
(void *)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int16_t));
#else
outsl(adp->controller->ioaddr + ATA_DATA,
(void *)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int32_t));
#endif
request->bytecount -= request->currentsize;
}
int32_t
ad_interrupt(struct ad_request *request)
{
struct ad_softc *adp = request->device;
int32_t dma_stat = 0;
/* finish DMA transfer */
if (request->flags & AR_F_DMA_USED)
dma_stat = ata_dmadone(adp->controller);
/* get drive status */
if (ata_wait(adp->controller, adp->unit, 0) < 0)
printf("ad_interrupt: timeout waiting for status");
if (adp->controller->status & ATA_S_CORR)
printf("ad%d: soft error ECC corrected\n", adp->lun);
if ((adp->controller->status & ATA_S_ERROR) ||
(request->flags & AR_F_DMA_USED && dma_stat != ATA_BMSTAT_INTERRUPT)) {
oops:
printf("ad%d: %s %s ERROR blk# %d", adp->lun,
(adp->controller->error & ATA_E_ICRC) ? "UDMA CRC" : "HARD",
(request->flags & AR_F_READ) ? "READ" : "WRITE",
request->blockaddr + (request->donecount / DEV_BSIZE));
/* if this is a UDMA CRC error, reinject request */
if (adp->controller->error & ATA_E_ICRC) {
untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
if (request->retries++ < AD_MAX_RETRIES)
printf(" retrying\n");
else {
ata_dmainit(adp->controller, adp->unit,
apiomode(adp->ata_parm), -1, -1);
adp->flags &= ~AD_F_DMA_ENABLED;
printf(" falling back to PIO mode\n");
}
TAILQ_INSERT_HEAD(&adp->controller->ata_queue, request, chain);
return ATA_OP_FINISHED;
}
/* if using DMA, try once again in PIO mode */
if (request->flags & AR_F_DMA_USED) {
untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
ata_dmainit(adp->controller, adp->unit,
apiomode(adp->ata_parm), -1, -1);
request->flags |= AR_F_FORCE_PIO;
adp->flags &= ~AD_F_DMA_ENABLED;
TAILQ_INSERT_HEAD(&adp->controller->ata_queue, request, chain);
return ATA_OP_FINISHED;
}
request->flags |= AR_F_ERROR;
printf(" status=%02x error=%02x\n",
adp->controller->status, adp->controller->error);
}
/* if we arrived here with forced PIO mode, DMA doesn't work right */
if (request->flags & AR_F_FORCE_PIO) {
printf("ad%d: DMA problem encountered, fallback to PIO mode\n",
adp->lun);
}
/* if this was a PIO read operation, get the data */
if (!(request->flags & AR_F_DMA_USED) &&
((request->flags & (AR_F_READ | AR_F_ERROR)) == AR_F_READ)) {
/* ready to receive data? */
if ((adp->controller->status & (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ))
!= (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ))
printf("ad_interrupt: read interrupt arrived early");
if (ata_wait(adp->controller, adp->unit,
(ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) != 0) {
printf("ad_interrupt: read error detected late");
goto oops;
}
/* data ready, read in */
#ifdef ATA_16BIT_ONLY
insw(adp->controller->ioaddr + ATA_DATA,
(void *)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int16_t));
#else
insl(adp->controller->ioaddr + ATA_DATA,
(void *)((uintptr_t)request->data + request->donecount),
request->currentsize / sizeof(int32_t));
#endif
request->bytecount -= request->currentsize;
}
/* if this was a DMA operation finish up */
if ((request->flags & AR_F_DMA_USED) && !(request->flags & AR_F_ERROR))
request->bytecount -= request->currentsize;
/* finish up this tranfer, check for more work on this buffer */
if (adp->controller->active == ATA_ACTIVE_ATA) {
if (request->flags & AR_F_ERROR) {
request->bp->b_error = EIO;
request->bp->b_flags |= B_ERROR;
}
else {
request->donecount += request->currentsize;
if (request->bytecount > 0) {
ad_transfer(request);
return ATA_OP_CONTINUES;
}
}
request->bp->b_resid = request->bytecount;
devstat_end_transaction_buf(&adp->stats, request->bp);
biodone(request->bp);
}
/* disarm timeout for this transfer */
untimeout((timeout_t *)ad_timeout, request, request->timeout_handle);
free(request, M_AD);
ad_start(adp);
return ATA_OP_FINISHED;
}
void
ad_reinit(struct ad_softc *adp)
{
/* reinit disk parameters */
ata_command(adp->controller, adp->unit, ATA_C_SET_MULTI, 0, 0, 0,
adp->transfersize / DEV_BSIZE, 0, ATA_IMMEDIATE);
ata_wait(adp->controller, adp->unit, ATA_S_READY);
ata_dmainit(adp->controller, adp->unit, apiomode(adp->ata_parm),
wdmamode(adp->ata_parm), udmamode(adp->ata_parm));
}
static void
ad_timeout(struct ad_request *request)
{
struct ad_softc *adp = request->device;
adp->controller->running = NULL;
printf("ad%d: ad_timeout: lost disk contact - resetting\n", adp->lun);
if (request->flags & AR_F_DMA_USED) {
ata_dmadone(adp->controller);
if (request->retries == AD_MAX_RETRIES) {
ata_dmainit(adp->controller, adp->unit,
apiomode(adp->ata_parm), -1, -1);
adp->flags &= ~AD_F_DMA_ENABLED;
printf("ad%d: ad_timeout: trying fallback to PIO mode\n", adp->lun);
request->retries = 0;
}
}
/* if retries still permit, reinject this request */
if (request->retries++ < AD_MAX_RETRIES)
TAILQ_INSERT_HEAD(&adp->controller->ata_queue, request, chain);
else {
/* retries all used up, return error */
request->bp->b_error = EIO;
request->bp->b_flags |= B_ERROR;
devstat_end_transaction_buf(&adp->stats, request->bp);
biodone(request->bp);
free(request, M_AD);
}
ata_reinit(adp->controller);
}
static int32_t
ad_version(u_int16_t version)
{
int32_t bit;
if (version == 0xffff)
return 0;
for (bit = 15; bit >= 0; bit--)
if (version & (1<<bit))
return bit;
return 0;
}
static void
ad_drvinit(void)
{
fakewd_cdevsw = ad_cdevsw;
fakewd_cdevsw.d_maj = 3;
fakewd_cdevsw.d_bmaj = 0;
fakewd_cdevsw.d_name = "wd";
/* register callback for when interrupts are enabled */
if (!(ad_attach_hook =
(struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
M_TEMP, M_NOWAIT))) {
printf("ad: malloc attach_hook failed\n");
return;
}
bzero(ad_attach_hook, sizeof(struct intr_config_hook));
ad_attach_hook->ich_func = ad_attach;
if (config_intrhook_establish(ad_attach_hook) != 0) {
printf("ad: config_intrhook_establish failed\n");
free(ad_attach_hook, M_TEMP);
}
}
SYSINIT(addev, SI_SUB_DRIVERS, SI_ORDER_SECOND, ad_drvinit, NULL)
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