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b0a7e6a56a
freebsd-dev/sys/dev/ata/ata-all.c
Søren Schmidt b0a7e6a56a Generalise the SATA PHY handling code so it wont be duplicated for 
each SATA chip.
Promise and Silicon Image are the current candidates for this.
2005-04-08 09:37:47 +00:00

851 lines
23 KiB
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/*-
* Copyright (c) 1998 - 2005 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.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ata.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/endian.h>
#include <sys/ctype.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/bio.h>
#include <sys/malloc.h>
#include <sys/sysctl.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>
#ifdef __alpha__
#include <machine/md_var.h>
#endif
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-commands.h>
#include <ata_if.h>
/* device structure */
static d_ioctl_t ata_ioctl;
static struct cdevsw ata_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT, /* we need this as newbus isn't safe */
.d_ioctl = ata_ioctl,
.d_name = "ata",
};
/* prototypes */
static void ata_interrupt(void *);
static void ata_boot_attach(void);
device_t ata_add_child(driver_t *driver, device_t parent, struct ata_device *atadev, const char *name, int unit);
/* global vars */
MALLOC_DEFINE(M_ATA, "ATA generic", "ATA driver generic layer");
int (*ata_ioctl_func)(struct ata_cmd *iocmd) = NULL;
devclass_t ata_devclass;
uma_zone_t ata_zone;
int ata_wc = 1;
/* local vars */
static struct intr_config_hook *ata_delayed_attach = NULL;
static int ata_dma = 1;
static int atapi_dma = 1;
/* sysctl vars */
SYSCTL_NODE(_hw, OID_AUTO, ata, CTLFLAG_RD, 0, "ATA driver parameters");
TUNABLE_INT("hw.ata.ata_dma", &ata_dma);
SYSCTL_INT(_hw_ata, OID_AUTO, ata_dma, CTLFLAG_RDTUN, &ata_dma, 0,
"ATA disk DMA mode control");
TUNABLE_INT("hw.ata.atapi_dma", &atapi_dma);
SYSCTL_INT(_hw_ata, OID_AUTO, atapi_dma, CTLFLAG_RDTUN, &atapi_dma, 0,
"ATAPI device DMA mode control");
TUNABLE_INT("hw.ata.wc", &ata_wc);
SYSCTL_INT(_hw_ata, OID_AUTO, wc, CTLFLAG_RDTUN, &ata_wc, 0,
"ATA disk write caching");
/*
* newbus device interface related functions
*/
int
ata_probe(device_t dev)
{
return 0;
}
int
ata_attach(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
int error, rid;
/* check that we have a virgin channel to attach */
if (ch->r_irq)
return EEXIST;
/* initialize the softc basics */
ch->dev = dev;
ch->state = ATA_IDLE;
bzero(&ch->state_mtx, sizeof(struct mtx));
mtx_init(&ch->state_mtx, "ATA state lock", NULL, MTX_DEF);
bzero(&ch->queue_mtx, sizeof(struct mtx));
mtx_init(&ch->queue_mtx, "ATA queue lock", NULL, MTX_DEF);
TAILQ_INIT(&ch->ata_queue);
/* reset the controller HW, the channel and device(s) */
while (ATA_LOCKING(dev, ATA_LF_LOCK) != ch->unit)
tsleep(&error, PRIBIO, "ataatch", 1);
ch->hw.reset(ch);
ATA_LOCKING(dev, ATA_LF_UNLOCK);
/* setup interrupt delivery */
rid = ATA_IRQ_RID;
ch->r_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (!ch->r_irq) {
device_printf(dev, "unable to allocate interrupt\n");
return ENXIO;
}
if ((error = bus_setup_intr(dev, ch->r_irq, ATA_INTR_FLAGS,
ata_interrupt, ch, &ch->ih))) {
device_printf(dev, "unable to setup interrupt\n");
return error;
}
/* do not attach devices if we are in early boot */
if (ata_delayed_attach)
return 0;
/* probe and attach devices on this channel */
bus_generic_probe(dev);
bus_generic_attach(dev);
return 0;
}
int
ata_detach(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
device_t *children;
int nchildren, i;
/* check that we have a vaild channel to detach */
if (!ch->r_irq)
return ENXIO;
/* detach & delete all children */
if (!device_get_children(dev, &children, &nchildren)) {
for (i = 0; i < nchildren; i++)
if (children[i])
device_delete_child(dev, children[i]);
free(children, M_TEMP);
}
/* fail outstanding requests on this channel (SOS shouldn't be any XXX ) */
ata_fail_requests(ch, NULL);
/* release resources */
bus_teardown_intr(dev, ch->r_irq, ch->ih);
bus_release_resource(dev, SYS_RES_IRQ, ATA_IRQ_RID, ch->r_irq);
ch->r_irq = NULL;
mtx_destroy(&ch->state_mtx);
mtx_destroy(&ch->queue_mtx);
return 0;
}
int
ata_reinit(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
device_t *children;
int nchildren, i;
if (!ch || !ch->r_irq)
return ENXIO;
if (bootverbose)
device_printf(dev, "reiniting channel ..\n");
/* poll for locking the channel */
while (ATA_LOCKING(dev, ATA_LF_LOCK) != ch->unit)
tsleep(&dev, PRIBIO, "atarini", 1);
/* grap the channel lock */
mtx_lock(&ch->state_mtx);
ch->state = ATA_STALL_QUEUE;
mtx_unlock(&ch->state_mtx);
/* reset the controller HW, the channel and device(s) */
ch->hw.reset(ch);
/* reinit the children and delete any that fails */
if (!device_get_children(dev, &children, &nchildren)) {
mtx_lock(&Giant); /* newbus suckage it needs Giant */
for (i = 0; i < nchildren; i++) {
if (children[i] && device_is_attached(children[i]))
if (ATA_REINIT(children[i])) {
if (ch->running->dev == children[i]) {
device_printf(ch->running->dev,
"FAILURE - device detached\n");
ch->running->dev = NULL;
ch->running = NULL;
}
device_delete_child(dev, children[i]);
}
}
free(children, M_TEMP);
mtx_unlock(&Giant); /* newbus suckage dealt with, release Giant */
}
/* catch running request if any */
ata_catch_inflight(ch);
/* we're done release the channel for new work */
mtx_lock(&ch->state_mtx);
ch->state = ATA_IDLE;
mtx_unlock(&ch->state_mtx);
ATA_LOCKING(dev, ATA_LF_UNLOCK);
if (bootverbose)
device_printf(dev, "reinit done ..\n");
/* kick off requests on the queue */
ata_start(dev);
return 0;
}
int
ata_suspend(device_t dev)
{
struct ata_channel *ch;
if (!dev || !(ch = device_get_softc(dev)))
return ENXIO;
/* wait for the channel to be IDLE before when enter suspend mode */
while (1) {
mtx_lock(&ch->state_mtx);
if (ch->state == ATA_IDLE) {
ch->state = ATA_ACTIVE;
mtx_unlock(&ch->state_mtx);
break;
}
mtx_unlock(&ch->state_mtx);
tsleep(ch, PRIBIO, "atasusp", hz/10);
}
ATA_LOCKING(dev, ATA_LF_UNLOCK);
return 0;
}
int
ata_resume(device_t dev)
{
struct ata_channel *ch;
int error;
if (!dev || !(ch = device_get_softc(dev)))
return ENXIO;
/* reinit the devices, we dont know what mode/state they have */
error = ata_reinit(dev);
/* kick off requests on the queue */
ata_start(dev);
return error;
}
static void
ata_interrupt(void *data)
{
struct ata_channel *ch = (struct ata_channel *)data;
struct ata_request *request;
mtx_lock(&ch->state_mtx);
do {
/* do we have a running request */
if (ch->state & ATA_TIMEOUT || !(request = ch->running))
break;
ATA_DEBUG_RQ(request, "interrupt");
/* ignore interrupt if device is busy */
if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
DELAY(100);
if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY)
break;
}
/* check for the right state */
if (ch->state == ATA_ACTIVE || ch->state == ATA_STALL_QUEUE) {
request->flags |= ATA_R_INTR_SEEN;
}
else {
device_printf(request->dev,
"interrupt state=%d unexpected\n", ch->state);
break;
}
/*
* we have the HW locks, so start the tranaction for this request
* if it finishes immediately we dont need to wait for interrupt
*/
if (ch->hw.end_transaction(request) == ATA_OP_FINISHED) {
ch->running = NULL;
if (ch->state == ATA_ACTIVE)
ch->state = ATA_IDLE;
mtx_unlock(&ch->state_mtx);
ATA_LOCKING(ch->dev, ATA_LF_UNLOCK);
ata_finish(request);
return;
}
else {
request->flags &= ~ATA_R_INTR_SEEN;
}
} while (0);
mtx_unlock(&ch->state_mtx);
}
/*
* device related interfaces
*/
static int
ata_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
int32_t flag, struct thread *td)
{
struct ata_cmd *iocmd = (struct ata_cmd *)addr;
device_t *children, device = NULL;
struct ata_request *request;
caddr_t buf;
int nchildren, i;
int error = ENOTTY;
if (cmd != IOCATA)
return ENOTSUP;
if (iocmd->cmd == ATAGMAXCHANNEL) {
iocmd->u.maxchan = devclass_get_maxunit(ata_devclass);
return 0;
}
if (iocmd->channel < 0 ||
iocmd->channel >= devclass_get_maxunit(ata_devclass)) {
return ENXIO;
}
if (!(device = devclass_get_device(ata_devclass, iocmd->channel)))
return ENXIO;
switch (iocmd->cmd) {
case ATAGPARM:
if (!device_get_children(device, &children, &nchildren)) {
struct ata_channel *ch;
if (!(ch = device_get_softc(device)))
return ENXIO;
iocmd->u.param.type[0] =
ch->devices & (ATA_ATA_MASTER | ATA_ATAPI_MASTER);
iocmd->u.param.type[1] =
ch->devices & (ATA_ATA_SLAVE | ATA_ATAPI_SLAVE);
for (i = 0; i < nchildren; i++) {
if (children[i] && device_is_attached(children[i])) {
struct ata_device *atadev = device_get_softc(children[i]);
if (atadev->unit == ATA_MASTER) {
strcpy(iocmd->u.param.name[0],
device_get_nameunit(children[i]));
bcopy(&atadev->param, &iocmd->u.param.params[0],
sizeof(struct ata_params));
}
if (atadev->unit == ATA_SLAVE) {
strcpy(iocmd->u.param.name[1],
device_get_nameunit(children[i]));
bcopy(&atadev->param, &iocmd->u.param.params[1],
sizeof(struct ata_params));
}
}
}
free(children, M_TEMP);
error = 0;
}
else
error = ENXIO;
break;
case ATAGMODE:
if (!device_get_children(device, &children, &nchildren)) {
for (i = 0; i < nchildren; i++) {
if (children[i] && device_is_attached(children[i])) {
struct ata_device *atadev = device_get_softc(children[i]);
atadev = device_get_softc(children[i]);
if (atadev->unit == ATA_MASTER)
iocmd->u.mode.mode[0] = atadev->mode;
if (atadev->unit == ATA_SLAVE)
iocmd->u.mode.mode[1] = atadev->mode;
}
free(children, M_TEMP);
}
error = 0;
}
else
error = ENXIO;
break;
case ATASMODE:
if (!device_get_children(device, &children, &nchildren)) {
for (i = 0; i < nchildren; i++) {
if (children[i] && device_is_attached(children[i])) {
struct ata_device *atadev = device_get_softc(children[i]);
if (atadev->unit == ATA_MASTER) {
atadev->mode = iocmd->u.mode.mode[0];
ATA_SETMODE(device, children[i]);
iocmd->u.mode.mode[0] = atadev->mode;
}
if (atadev->unit == ATA_SLAVE) {
atadev->mode = iocmd->u.mode.mode[1];
ATA_SETMODE(device, children[i]);
iocmd->u.mode.mode[1] = atadev->mode;
}
}
}
free(children, M_TEMP);
error = 0;
}
else
error = ENXIO;
break;
case ATAREQUEST:
if (!device_get_children(device, &children, &nchildren)) {
for (i = 0; i < nchildren; i++) {
if (children[i] && device_is_attached(children[i])) {
struct ata_device *atadev = device_get_softc(children[i]);
if (ATA_DEV(atadev->unit) == iocmd->device) {
if (!(buf = malloc(iocmd->u.request.count,
M_ATA, M_NOWAIT))) {
error = ENOMEM;
break;
}
if (!(request = ata_alloc_request())) {
error = ENOMEM;
free(buf, M_ATA);
break;
}
if (iocmd->u.request.flags & ATA_CMD_WRITE) {
error = copyin(iocmd->u.request.data, buf,
iocmd->u.request.count);
if (error) {
free(buf, M_ATA);
ata_free_request(request);
break;
}
}
request->dev = atadev->dev;
if (iocmd->u.request.flags & ATA_CMD_ATAPI) {
request->flags = ATA_R_ATAPI;
bcopy(iocmd->u.request.u.atapi.ccb,
request->u.atapi.ccb, 16);
}
else {
request->u.ata.command =
iocmd->u.request.u.ata.command;
request->u.ata.feature =
iocmd->u.request.u.ata.feature;
request->u.ata.lba = iocmd->u.request.u.ata.lba;
request->u.ata.count = iocmd->u.request.u.ata.count;
}
request->timeout = iocmd->u.request.timeout;
request->data = buf;
request->bytecount = iocmd->u.request.count;
request->transfersize = request->bytecount;
if (iocmd->u.request.flags & ATA_CMD_CONTROL)
request->flags |= ATA_R_CONTROL;
if (iocmd->u.request.flags & ATA_CMD_READ)
request->flags |= ATA_R_READ;
if (iocmd->u.request.flags & ATA_CMD_WRITE)
request->flags |= ATA_R_WRITE;
ata_queue_request(request);
if (!(request->flags & ATA_R_ATAPI)) {
iocmd->u.request.u.ata.command =
request->u.ata.command;
iocmd->u.request.u.ata.feature =
request->u.ata.feature;
iocmd->u.request.u.ata.lba = request->u.ata.lba;
iocmd->u.request.u.ata.count = request->u.ata.count;
}
iocmd->u.request.error = request->result;
if (iocmd->u.request.flags & ATA_CMD_READ)
error = copyout(buf, iocmd->u.request.data,
iocmd->u.request.count);
else
error = 0;
free(buf, M_ATA);
ata_free_request(request);
break;
}
}
}
free(children, M_TEMP);
}
else
error = ENXIO;
break;
case ATAREINIT:
error = ata_reinit(device);
ata_start(device);
break;
case ATAATTACH:
/* SOS should enable channel HW on controller XXX */
error = ata_attach(device);
break;
case ATADETACH:
error = ata_detach(device);
/* SOS should disable channel HW on controller XXX */
break;
default:
if (ata_ioctl_func)
error = ata_ioctl_func(iocmd);
}
return error;
}
static void
ata_boot_attach(void)
{
struct ata_channel *ch;
int ctlr;
/* release the hook that got us here, only needed during boot */
if (ata_delayed_attach) {
config_intrhook_disestablish(ata_delayed_attach);
free(ata_delayed_attach, M_TEMP);
ata_delayed_attach = NULL;
}
/* kick of probe and attach on all channels */
for (ctlr = 0; ctlr < devclass_get_maxunit(ata_devclass); ctlr++) {
if ((ch = devclass_get_softc(ata_devclass, ctlr))) {
bus_generic_probe(ch->dev);
bus_generic_attach(ch->dev);
}
}
}
/*
* misc support functions
*/
device_t
ata_add_child(driver_t *driver, device_t parent, struct ata_device *atadev,
const char *name, int unit)
{
struct ata_channel *ch = device_get_softc(parent);
device_t child;
if ((child = device_add_child(parent, name, unit))) {
char buffer[64];
device_set_driver(child, driver);
device_set_softc(child, atadev);
sprintf(buffer, "%.40s/%.8s",
atadev->param.model, atadev->param.revision);
device_set_desc_copy(child, buffer);
device_quiet(child);
atadev->dev = child;
atadev->max_iosize = DEV_BSIZE;
atadev->mode = ATA_PIO_MAX;
if ((atadev->param.config & ATA_PROTO_MASK) == ATA_PROTO_ATAPI_12) {
if (atapi_dma && ch->dma &&
(atadev->param.config & ATA_DRQ_MASK) != ATA_DRQ_INTR &&
ata_umode(&atadev->param) >= ATA_UDMA2)
atadev->mode = ATA_DMA_MAX;
}
else {
if (ata_dma && ch->dma)
atadev->mode = ATA_DMA_MAX;
}
}
return child;
}
void
ata_identify(driver_t *driver, device_t parent, int type, const char *name)
{
struct ata_channel *ch = device_get_softc(parent);
struct ata_device *master, *slave;
int master_res = EIO, slave_res = EIO, master_unit = -1, slave_unit = -1;
if (!(master = malloc(sizeof(struct ata_device),
M_ATA, M_NOWAIT | M_ZERO))) {
device_printf(parent, "out of memory\n");
return;
}
master->unit = ATA_MASTER;
if (!(slave = malloc(sizeof(struct ata_device),
M_ATA, M_NOWAIT | M_ZERO))) {
free(master, M_ATA);
device_printf(parent, "out of memory\n");
return;
}
slave->unit = ATA_SLAVE;
/* wait for the channel to be IDLE then grab it before touching HW */
while (ATA_LOCKING(parent, ATA_LF_LOCK) != ch->unit)
tsleep(ch, PRIBIO, "ataidnt2", 1);
while (1) {
mtx_lock(&ch->state_mtx);
if (ch->state == ATA_IDLE) {
ch->state = ATA_ACTIVE;
mtx_unlock(&ch->state_mtx);
break;
}
mtx_unlock(&ch->state_mtx);
tsleep(ch, PRIBIO, "ataidnt1", 1);
}
if (type < 0) {
if (ch->devices & ATA_ATA_SLAVE)
slave_res = ata_getparam(parent, slave, ATA_ATA_IDENTIFY);
if (ch->devices & ATA_ATA_MASTER)
master_res = ata_getparam(parent, master, ATA_ATA_IDENTIFY);
#ifdef ATA_STATIC_ID
master_unit = (device_get_unit(parent) << 1);
slave_unit = (device_get_unit(parent) << 1) + 1;
#endif
}
else {
if (ch->devices & ATA_ATAPI_SLAVE)
slave_res = ata_getparam(parent, slave, ATA_ATAPI_IDENTIFY);
if (ch->devices & ATA_ATAPI_MASTER)
master_res = ata_getparam(parent, master, ATA_ATAPI_IDENTIFY);
}
if (master_res ||
!(type < 0 || (master->param.config & ATA_ATAPI_TYPE_MASK) == type) ||
!ata_add_child(driver, parent, master, name, master_unit))
free(master, M_ATA);
if (slave_res ||
!(type < 0 || (slave->param.config & ATA_ATAPI_TYPE_MASK) == type) ||
!ata_add_child(driver, parent, slave, name, slave_unit))
free(slave, M_ATA);
mtx_lock(&ch->state_mtx);
ch->state = ATA_IDLE;
mtx_unlock(&ch->state_mtx);
ATA_LOCKING(parent, ATA_LF_UNLOCK);
}
void
ata_default_registers(struct ata_channel *ch)
{
/* fill in the defaults from whats setup already */
ch->r_io[ATA_ERROR].res = ch->r_io[ATA_FEATURE].res;
ch->r_io[ATA_ERROR].offset = ch->r_io[ATA_FEATURE].offset;
ch->r_io[ATA_IREASON].res = ch->r_io[ATA_COUNT].res;
ch->r_io[ATA_IREASON].offset = ch->r_io[ATA_COUNT].offset;
ch->r_io[ATA_STATUS].res = ch->r_io[ATA_COMMAND].res;
ch->r_io[ATA_STATUS].offset = ch->r_io[ATA_COMMAND].offset;
ch->r_io[ATA_ALTSTAT].res = ch->r_io[ATA_CONTROL].res;
ch->r_io[ATA_ALTSTAT].offset = ch->r_io[ATA_CONTROL].offset;
}
void
ata_udelay(int interval)
{
/* for now just use DELAY, the timer/sleep subsytems are not there yet */
if (1 || interval < (1000000/hz) || ata_delayed_attach)
DELAY(interval);
else
tsleep(&interval, PRIBIO, "ataslp", interval/(1000000/hz));
}
char *
ata_mode2str(int mode)
{
switch (mode) {
case ATA_PIO0: return "PIO0";
case ATA_PIO1: return "PIO1";
case ATA_PIO2: return "PIO2";
case ATA_PIO3: return "PIO3";
case ATA_PIO4: return "PIO4";
case ATA_WDMA0: return "WDMA0";
case ATA_WDMA1: return "WDMA1";
case ATA_WDMA2: return "WDMA2";
case ATA_UDMA0: return "UDMA16";
case ATA_UDMA1: return "UDMA25";
case ATA_UDMA2: return "UDMA33";
case ATA_UDMA3: return "UDMA40";
case ATA_UDMA4: return "UDMA66";
case ATA_UDMA5: return "UDMA100";
case ATA_UDMA6: return "UDMA133";
case ATA_SA150: return "SATA150";
default:
if (mode & ATA_DMA_MASK)
return "BIOSDMA";
else
return "BIOSPIO";
}
}
int
ata_pmode(struct ata_params *ap)
{
if (ap->atavalid & ATA_FLAG_64_70) {
if (ap->apiomodes & 0x02)
return ATA_PIO4;
if (ap->apiomodes & 0x01)
return ATA_PIO3;
}
if (ap->mwdmamodes & 0x04)
return ATA_PIO4;
if (ap->mwdmamodes & 0x02)
return ATA_PIO3;
if (ap->mwdmamodes & 0x01)
return ATA_PIO2;
if ((ap->retired_piomode & ATA_RETIRED_PIO_MASK) == 0x200)
return ATA_PIO2;
if ((ap->retired_piomode & ATA_RETIRED_PIO_MASK) == 0x100)
return ATA_PIO1;
if ((ap->retired_piomode & ATA_RETIRED_PIO_MASK) == 0x000)
return ATA_PIO0;
return ATA_PIO0;
}
int
ata_wmode(struct ata_params *ap)
{
if (ap->mwdmamodes & 0x04)
return ATA_WDMA2;
if (ap->mwdmamodes & 0x02)
return ATA_WDMA1;
if (ap->mwdmamodes & 0x01)
return ATA_WDMA0;
return -1;
}
int
ata_umode(struct ata_params *ap)
{
if (ap->atavalid & ATA_FLAG_88) {
if (ap->udmamodes & 0x40)
return ATA_UDMA6;
if (ap->udmamodes & 0x20)
return ATA_UDMA5;
if (ap->udmamodes & 0x10)
return ATA_UDMA4;
if (ap->udmamodes & 0x08)
return ATA_UDMA3;
if (ap->udmamodes & 0x04)
return ATA_UDMA2;
if (ap->udmamodes & 0x02)
return ATA_UDMA1;
if (ap->udmamodes & 0x01)
return ATA_UDMA0;
}
return -1;
}
int
ata_limit_mode(struct ata_device *atadev, int mode, int maxmode)
{
if (maxmode && mode > maxmode)
mode = maxmode;
if (mode >= ATA_UDMA0 && ata_umode(&atadev->param) > 0)
return min(mode, ata_umode(&atadev->param));
if (mode >= ATA_WDMA0 && ata_wmode(&atadev->param) > 0)
return min(mode, ata_wmode(&atadev->param));
if (mode > ata_pmode(&atadev->param))
return min(mode, ata_pmode(&atadev->param));
return mode;
}
/*
* module handeling
*/
static int
ata_module_event_handler(module_t mod, int what, void *arg)
{
static struct cdev *atacdev;
switch (what) {
case MOD_LOAD:
/* register controlling device */
atacdev = make_dev(&ata_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "ata");
if (cold) {
/* register boot attach to be run when interrupts are enabled */
if (!(ata_delayed_attach = (struct intr_config_hook *)
malloc(sizeof(struct intr_config_hook),
M_TEMP, M_NOWAIT | M_ZERO))) {
printf("ata: malloc of delayed attach hook failed\n");
return EIO;
}
ata_delayed_attach->ich_func = (void*)ata_boot_attach;
if (config_intrhook_establish(ata_delayed_attach) != 0) {
printf("ata: config_intrhook_establish failed\n");
free(ata_delayed_attach, M_TEMP);
}
}
return 0;
case MOD_UNLOAD:
/* deregister controlling device */
destroy_dev(atacdev);
return 0;
default:
return EOPNOTSUPP;
}
}
static moduledata_t ata_moduledata = { "ata", ata_module_event_handler, NULL };
DECLARE_MODULE(ata, ata_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
MODULE_VERSION(ata, 1);
static void
ata_init(void)
{
/* init our UMA zone for ATA requests */
ata_zone = uma_zcreate("ata_request", sizeof(struct ata_request),
NULL, NULL, NULL, NULL, 0, 0);
}
SYSINIT(atadev, SI_SUB_DRIVERS, SI_ORDER_SECOND, ata_init, NULL)
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