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freebsd-dev/sys/dev/ata/ata-lowlevel.c
Pedro F. Giffuni 9c2ceeafd5 Small typo.
2016-03-29 23:33:44 +00:00

994 lines
28 KiB
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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 <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/endian.h>
#include <sys/ata.h>
#include <sys/bio.h>
#include <sys/conf.h>
#include <sys/ctype.h>
#include <sys/bus.h>
#include <sys/sema.h>
#include <sys/taskqueue.h>
#include <vm/uma.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-pci.h>
#include <ata_if.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
/* prototypes */
static int ata_generic_status(device_t dev);
static int ata_wait(struct ata_channel *ch, int unit, u_int8_t);
static void ata_pio_read(struct ata_request *, int);
static void ata_pio_write(struct ata_request *, int);
static void ata_tf_read(struct ata_request *);
static void ata_tf_write(struct ata_request *);
/*
* low level ATA functions
*/
void
ata_generic_hw(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
ch->hw.begin_transaction = ata_begin_transaction;
ch->hw.end_transaction = ata_end_transaction;
ch->hw.status = ata_generic_status;
ch->hw.softreset = NULL;
ch->hw.command = ata_generic_command;
ch->hw.tf_read = ata_tf_read;
ch->hw.tf_write = ata_tf_write;
ch->hw.pm_read = NULL;
ch->hw.pm_write = NULL;
}
/* must be called with ATA channel locked and state_mtx held */
int
ata_begin_transaction(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(request->parent);
int dummy, error;
ATA_DEBUG_RQ(request, "begin transaction");
/* disable ATAPI DMA writes if HW doesn't support it */
if ((ch->flags & ATA_NO_ATAPI_DMA) &&
(request->flags & ATA_R_ATAPI) == ATA_R_ATAPI)
request->flags &= ~ATA_R_DMA;
if ((ch->flags & ATA_ATAPI_DMA_RO) &&
((request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_WRITE)) ==
(ATA_R_ATAPI | ATA_R_DMA | ATA_R_WRITE)))
request->flags &= ~ATA_R_DMA;
switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA)) {
/* ATA PIO data transfer and control commands */
default:
{
/* record command direction here as our request might be gone later */
int write = (request->flags & ATA_R_WRITE);
/* issue command */
if (ch->hw.command(request)) {
device_printf(request->parent, "error issuing %s command\n",
ata_cmd2str(request));
request->result = EIO;
goto begin_finished;
}
/* device reset doesn't interrupt */
if (request->u.ata.command == ATA_DEVICE_RESET) {
int timeout = 1000000;
do {
DELAY(10);
request->status = ATA_IDX_INB(ch, ATA_STATUS);
} while (request->status & ATA_S_BUSY && timeout--);
if (request->status & ATA_S_ERROR)
request->error = ATA_IDX_INB(ch, ATA_ERROR);
ch->hw.tf_read(request);
goto begin_finished;
}
/* if write command output the data */
if (write) {
if (ata_wait(ch, request->unit, (ATA_S_READY | ATA_S_DRQ)) < 0) {
device_printf(request->parent,
"timeout waiting for write DRQ\n");
request->result = EIO;
goto begin_finished;
}
ata_pio_write(request, request->transfersize);
}
}
goto begin_continue;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* check sanity, setup SG list and DMA engine */
if ((error = ch->dma.load(request, NULL, &dummy))) {
device_printf(request->parent, "setting up DMA failed\n");
request->result = error;
goto begin_finished;
}
/* start DMA engine if necessary */
if ((ch->flags & ATA_DMA_BEFORE_CMD) &&
ch->dma.start && ch->dma.start(request)) {
device_printf(request->parent, "error starting DMA\n");
request->result = EIO;
goto begin_finished;
}
/* issue command */
if (ch->hw.command(request)) {
device_printf(request->parent, "error issuing %s command\n",
ata_cmd2str(request));
request->result = EIO;
goto begin_finished;
}
/* start DMA engine */
if (!(ch->flags & ATA_DMA_BEFORE_CMD) &&
ch->dma.start && ch->dma.start(request)) {
device_printf(request->parent, "error starting DMA\n");
request->result = EIO;
goto begin_finished;
}
goto begin_continue;
/* ATAPI PIO commands */
case ATA_R_ATAPI:
/* is this just a POLL DSC command ? */
if (request->u.atapi.ccb[0] == ATAPI_POLL_DSC) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_DEV(request->unit));
DELAY(10);
if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DSC))
request->result = EBUSY;
goto begin_finished;
}
/* start ATAPI operation */
if (ch->hw.command(request)) {
device_printf(request->parent, "error issuing ATA PACKET command\n");
request->result = EIO;
goto begin_finished;
}
goto begin_continue;
/* ATAPI DMA commands */
case ATA_R_ATAPI|ATA_R_DMA:
/* is this just a POLL DSC command ? */
if (request->u.atapi.ccb[0] == ATAPI_POLL_DSC) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_DEV(request->unit));
DELAY(10);
if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DSC))
request->result = EBUSY;
goto begin_finished;
}
/* check sanity, setup SG list and DMA engine */
if ((error = ch->dma.load(request, NULL, &dummy))) {
device_printf(request->parent, "setting up DMA failed\n");
request->result = error;
goto begin_finished;
}
/* start ATAPI operation */
if (ch->hw.command(request)) {
device_printf(request->parent, "error issuing ATA PACKET command\n");
request->result = EIO;
goto begin_finished;
}
/* start DMA engine */
if (ch->dma.start && ch->dma.start(request)) {
request->result = EIO;
goto begin_finished;
}
goto begin_continue;
}
/* NOT REACHED */
printf("ata_begin_transaction OOPS!!!\n");
begin_finished:
if (ch->dma.unload) {
ch->dma.unload(request);
}
return ATA_OP_FINISHED;
begin_continue:
callout_reset(&request->callout, request->timeout * hz,
(timeout_t*)ata_timeout, request);
return ATA_OP_CONTINUES;
}
/* must be called with ATA channel locked and state_mtx held */
int
ata_end_transaction(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(request->parent);
int length;
ATA_DEBUG_RQ(request, "end transaction");
/* clear interrupt and get status */
request->status = ATA_IDX_INB(ch, ATA_STATUS);
switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_CONTROL)) {
/* ATA PIO data transfer and control commands */
default:
/* on timeouts we have no data or anything so just return */
if (request->flags & ATA_R_TIMEOUT)
goto end_finished;
/* Read back registers to the request struct. */
if ((request->status & ATA_S_ERROR) ||
(request->flags & (ATA_R_CONTROL | ATA_R_NEEDRESULT))) {
ch->hw.tf_read(request);
}
/* if we got an error we are done with the HW */
if (request->status & ATA_S_ERROR) {
request->error = ATA_IDX_INB(ch, ATA_ERROR);
goto end_finished;
}
/* are we moving data ? */
if (request->flags & (ATA_R_READ | ATA_R_WRITE)) {
/* if read data get it */
if (request->flags & ATA_R_READ) {
int flags = ATA_S_DRQ;
if (request->u.ata.command != ATA_ATAPI_IDENTIFY)
flags |= ATA_S_READY;
if (ata_wait(ch, request->unit, flags) < 0) {
device_printf(request->parent,
"timeout waiting for read DRQ\n");
request->result = EIO;
goto end_finished;
}
ata_pio_read(request, request->transfersize);
}
/* update how far we've gotten */
request->donecount += request->transfersize;
/* do we need a scoop more ? */
if (request->bytecount > request->donecount) {
/* set this transfer size according to HW capabilities */
request->transfersize =
min((request->bytecount - request->donecount),
request->transfersize);
/* if data write command, output the data */
if (request->flags & ATA_R_WRITE) {
/* if we get an error here we are done with the HW */
if (ata_wait(ch, request->unit, (ATA_S_READY | ATA_S_DRQ)) < 0) {
device_printf(request->parent,
"timeout waiting for write DRQ\n");
request->status = ATA_IDX_INB(ch, ATA_STATUS);
goto end_finished;
}
/* output data and return waiting for new interrupt */
ata_pio_write(request, request->transfersize);
goto end_continue;
}
/* if data read command, return & wait for interrupt */
if (request->flags & ATA_R_READ)
goto end_continue;
}
}
/* done with HW */
goto end_finished;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* stop DMA engine and get status */
if (ch->dma.stop)
request->dma->status = ch->dma.stop(request);
/* did we get error or data */
if (request->status & ATA_S_ERROR)
request->error = ATA_IDX_INB(ch, ATA_ERROR);
else if (request->dma->status & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else if (!(request->flags & ATA_R_TIMEOUT))
request->donecount = request->bytecount;
/* Read back registers to the request struct. */
if ((request->status & ATA_S_ERROR) ||
(request->flags & (ATA_R_CONTROL | ATA_R_NEEDRESULT))) {
ch->hw.tf_read(request);
}
/* release SG list etc */
ch->dma.unload(request);
/* done with HW */
goto end_finished;
/* ATAPI PIO commands */
case ATA_R_ATAPI:
length = ATA_IDX_INB(ch, ATA_CYL_LSB)|(ATA_IDX_INB(ch, ATA_CYL_MSB)<<8);
/* on timeouts we have no data or anything so just return */
if (request->flags & ATA_R_TIMEOUT)
goto end_finished;
switch ((ATA_IDX_INB(ch, ATA_IREASON) & (ATA_I_CMD | ATA_I_IN)) |
(request->status & ATA_S_DRQ)) {
case ATAPI_P_CMDOUT:
/* this seems to be needed for some (slow) devices */
DELAY(10);
if (!(request->status & ATA_S_DRQ)) {
device_printf(request->parent, "command interrupt without DRQ\n");
request->status = ATA_S_ERROR;
goto end_finished;
}
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
(request->flags & ATA_R_ATAPI16) ? 8 : 6);
/* return wait for interrupt */
goto end_continue;
case ATAPI_P_WRITE:
if (request->flags & ATA_R_READ) {
request->status = ATA_S_ERROR;
device_printf(request->parent,
"%s trying to write on read buffer\n",
ata_cmd2str(request));
goto end_finished;
}
ata_pio_write(request, length);
request->donecount += length;
/* set next transfer size according to HW capabilities */
request->transfersize = min((request->bytecount-request->donecount),
request->transfersize);
/* return wait for interrupt */
goto end_continue;
case ATAPI_P_READ:
if (request->flags & ATA_R_WRITE) {
request->status = ATA_S_ERROR;
device_printf(request->parent,
"%s trying to read on write buffer\n",
ata_cmd2str(request));
goto end_finished;
}
ata_pio_read(request, length);
request->donecount += length;
/* set next transfer size according to HW capabilities */
request->transfersize = min((request->bytecount-request->donecount),
request->transfersize);
/* return wait for interrupt */
goto end_continue;
case ATAPI_P_DONEDRQ:
device_printf(request->parent,
"WARNING - %s DONEDRQ non conformant device\n",
ata_cmd2str(request));
if (request->flags & ATA_R_READ) {
ata_pio_read(request, length);
request->donecount += length;
}
else if (request->flags & ATA_R_WRITE) {
ata_pio_write(request, length);
request->donecount += length;
}
else
request->status = ATA_S_ERROR;
/* FALLTHROUGH */
case ATAPI_P_ABORT:
case ATAPI_P_DONE:
if (request->status & (ATA_S_ERROR | ATA_S_DWF))
request->error = ATA_IDX_INB(ch, ATA_ERROR);
goto end_finished;
default:
device_printf(request->parent, "unknown transfer phase\n");
request->status = ATA_S_ERROR;
}
/* done with HW */
goto end_finished;
/* ATAPI DMA commands */
case ATA_R_ATAPI|ATA_R_DMA:
/* stop DMA engine and get status */
if (ch->dma.stop)
request->dma->status = ch->dma.stop(request);
/* did we get error or data */
if (request->status & (ATA_S_ERROR | ATA_S_DWF))
request->error = ATA_IDX_INB(ch, ATA_ERROR);
else if (request->dma->status & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else if (!(request->flags & ATA_R_TIMEOUT))
request->donecount = request->bytecount;
/* release SG list etc */
ch->dma.unload(request);
/* done with HW */
goto end_finished;
}
/* NOT REACHED */
printf("ata_end_transaction OOPS!!\n");
end_finished:
callout_stop(&request->callout);
return ATA_OP_FINISHED;
end_continue:
return ATA_OP_CONTINUES;
}
/* must be called with ATA channel locked and state_mtx held */
void
ata_generic_reset(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
u_int8_t ostat0 = 0, stat0 = 0, ostat1 = 0, stat1 = 0;
u_int8_t err = 0, lsb = 0, msb = 0;
int mask = 0, timeout;
/* do we have any signs of ATA/ATAPI HW being present ? */
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_DEV(ATA_MASTER));
DELAY(10);
ostat0 = ATA_IDX_INB(ch, ATA_STATUS);
if (((ostat0 & 0xf8) != 0xf8 || (ch->flags & ATA_KNOWN_PRESENCE)) &&
ostat0 != 0xa5) {
stat0 = ATA_S_BUSY;
mask |= 0x01;
}
/* in some setups we dont want to test for a slave */
if (!(ch->flags & ATA_NO_SLAVE)) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_DEV(ATA_SLAVE));
DELAY(10);
ostat1 = ATA_IDX_INB(ch, ATA_STATUS);
if (((ostat1 & 0xf8) != 0xf8 || (ch->flags & ATA_KNOWN_PRESENCE)) &&
ostat1 != 0xa5) {
stat1 = ATA_S_BUSY;
mask |= 0x02;
}
}
if (bootverbose)
device_printf(dev, "reset tp1 mask=%02x ostat0=%02x ostat1=%02x\n",
mask, ostat0, ostat1);
/* if nothing showed up there is no need to get any further */
/* XXX SOS is that too strong?, we just might lose devices here */
ch->devices = 0;
if (!mask)
return;
/* reset (both) devices on this channel */
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_DEV(ATA_MASTER));
DELAY(10);
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_IDS | ATA_A_RESET);
ata_udelay(10000);
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_IDS);
ata_udelay(100000);
ATA_IDX_INB(ch, ATA_ERROR);
/* wait for BUSY to go inactive */
for (timeout = 0; timeout < 310; timeout++) {
if ((mask & 0x01) && (stat0 & ATA_S_BUSY)) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_DEV(ATA_MASTER));
DELAY(10);
if (ch->flags & ATA_STATUS_IS_LONG)
stat0 = ATA_IDX_INL(ch, ATA_STATUS) & 0xff;
else
stat0 = ATA_IDX_INB(ch, ATA_STATUS);
err = ATA_IDX_INB(ch, ATA_ERROR);
lsb = ATA_IDX_INB(ch, ATA_CYL_LSB);
msb = ATA_IDX_INB(ch, ATA_CYL_MSB);
if (bootverbose)
device_printf(dev,
"stat0=0x%02x err=0x%02x lsb=0x%02x msb=0x%02x\n",
stat0, err, lsb, msb);
if (stat0 == err && lsb == err && msb == err &&
timeout > (stat0 & ATA_S_BUSY ? 100 : 10))
mask &= ~0x01;
if (!(stat0 & ATA_S_BUSY)) {
if ((err & 0x7f) == ATA_E_ILI) {
if (lsb == ATAPI_MAGIC_LSB && msb == ATAPI_MAGIC_MSB) {
ch->devices |= ATA_ATAPI_MASTER;
}
else if (lsb == 0 && msb == 0 && (stat0 & ATA_S_READY)) {
ch->devices |= ATA_ATA_MASTER;
}
}
else if ((stat0 & 0x0f) && err == lsb && err == msb) {
stat0 |= ATA_S_BUSY;
}
}
}
if ((mask & 0x02) && (stat1 & ATA_S_BUSY) &&
!((mask & 0x01) && (stat0 & ATA_S_BUSY))) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_DEV(ATA_SLAVE));
DELAY(10);
if (ch->flags & ATA_STATUS_IS_LONG)
stat1 = ATA_IDX_INL(ch, ATA_STATUS) & 0xff;
else
stat1 = ATA_IDX_INB(ch, ATA_STATUS);
err = ATA_IDX_INB(ch, ATA_ERROR);
lsb = ATA_IDX_INB(ch, ATA_CYL_LSB);
msb = ATA_IDX_INB(ch, ATA_CYL_MSB);
if (bootverbose)
device_printf(dev,
"stat1=0x%02x err=0x%02x lsb=0x%02x msb=0x%02x\n",
stat1, err, lsb, msb);
if (stat1 == err && lsb == err && msb == err &&
timeout > (stat1 & ATA_S_BUSY ? 100 : 10))
mask &= ~0x02;
if (!(stat1 & ATA_S_BUSY)) {
if ((err & 0x7f) == ATA_E_ILI) {
if (lsb == ATAPI_MAGIC_LSB && msb == ATAPI_MAGIC_MSB) {
ch->devices |= ATA_ATAPI_SLAVE;
}
else if (lsb == 0 && msb == 0 && (stat1 & ATA_S_READY)) {
ch->devices |= ATA_ATA_SLAVE;
}
}
else if ((stat1 & 0x0f) && err == lsb && err == msb) {
stat1 |= ATA_S_BUSY;
}
}
}
if ((ch->flags & ATA_KNOWN_PRESENCE) == 0 &&
timeout > ((mask == 0x03) ? 20 : 10)) {
if ((mask & 0x01) && stat0 == 0xff)
mask &= ~0x01;
if ((mask & 0x02) && stat1 == 0xff)
mask &= ~0x02;
}
if (((mask & 0x01) == 0 || !(stat0 & ATA_S_BUSY)) &&
((mask & 0x02) == 0 || !(stat1 & ATA_S_BUSY)))
break;
ata_udelay(100000);
}
if (bootverbose)
device_printf(dev, "reset tp2 stat0=%02x stat1=%02x devices=0x%x\n",
stat0, stat1, ch->devices);
}
/* must be called with ATA channel locked and state_mtx held */
static int
ata_generic_status(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
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;
}
static int
ata_wait(struct ata_channel *ch, int unit, u_int8_t mask)
{
u_int8_t status;
int timeout = 0;
DELAY(1);
/* wait at max 1 second for device to get !BUSY */
while (timeout < 1000000) {
status = ATA_IDX_INB(ch, ATA_ALTSTAT);
/* if drive fails status, reselect the drive and try again */
if (status == 0xff) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_DEV(unit));
timeout += 1000;
DELAY(1000);
continue;
}
/* are we done ? */
if (!(status & ATA_S_BUSY))
break;
if (timeout > 1000) {
timeout += 1000;
DELAY(1000);
}
else {
timeout += 10;
DELAY(10);
}
}
if (timeout >= 1000000)
return -2;
if (!mask)
return (status & ATA_S_ERROR);
DELAY(1);
/* wait 50 msec for bits wanted */
timeout = 5000;
while (timeout--) {
status = ATA_IDX_INB(ch, ATA_ALTSTAT);
if ((status & mask) == mask)
return (status & ATA_S_ERROR);
DELAY(10);
}
return -3;
}
int
ata_generic_command(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(request->parent);
/* select device */
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_DEV(request->unit));
/* ready to issue command ? */
if (ata_wait(ch, request->unit, 0) < 0) {
device_printf(request->parent, "timeout waiting to issue command\n");
request->flags |= ATA_R_TIMEOUT;
return (-1);
}
/* enable interrupt */
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_4BIT);
if (request->flags & ATA_R_ATAPI) {
int timeout = 5000;
int res;
/* issue packet command to controller */
if (request->flags & ATA_R_DMA) {
ATA_IDX_OUTB(ch, ATA_FEATURE, ATA_F_DMA);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, 0);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, 0);
}
else {
ATA_IDX_OUTB(ch, ATA_FEATURE, 0);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->transfersize);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->transfersize >> 8);
}
ATA_IDX_OUTB(ch, ATA_COMMAND, ATA_PACKET_CMD);
/* command interrupt device ? just return and wait for interrupt */
if (request->flags & ATA_R_ATAPI_INTR)
return (0);
/* command processed ? */
res = ata_wait(ch, request->unit, 0);
if (res != 0) {
if (res < 0) {
device_printf(request->parent,
"timeout waiting for PACKET command\n");
request->flags |= ATA_R_TIMEOUT;
}
return (-1);
}
/* wait for ready to write ATAPI command block */
while (timeout--) {
int reason = ATA_IDX_INB(ch, ATA_IREASON);
int status = ATA_IDX_INB(ch, ATA_STATUS);
if (((reason & (ATA_I_CMD | ATA_I_IN)) |
(status & (ATA_S_DRQ | ATA_S_BUSY))) == ATAPI_P_CMDOUT)
break;
DELAY(20);
}
if (timeout <= 0) {
device_printf(request->parent,
"timeout waiting for ATAPI ready\n");
request->flags |= ATA_R_TIMEOUT;
return (-1);
}
/* this seems to be needed for some (slow) devices */
DELAY(10);
/* output command block */
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
(request->flags & ATA_R_ATAPI16) ? 8 : 6);
}
else {
ch->hw.tf_write(request);
/* issue command to controller */
ATA_IDX_OUTB(ch, ATA_COMMAND, request->u.ata.command);
}
return (0);
}
static void
ata_tf_read(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(request->parent);
if (request->flags & ATA_R_48BIT) {
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_4BIT | ATA_A_HOB);
request->u.ata.count = (ATA_IDX_INB(ch, ATA_COUNT) << 8);
request->u.ata.lba =
((u_int64_t)(ATA_IDX_INB(ch, ATA_SECTOR)) << 24) |
((u_int64_t)(ATA_IDX_INB(ch, ATA_CYL_LSB)) << 32) |
((u_int64_t)(ATA_IDX_INB(ch, ATA_CYL_MSB)) << 40);
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_4BIT);
request->u.ata.count |= ATA_IDX_INB(ch, ATA_COUNT);
request->u.ata.lba |=
(ATA_IDX_INB(ch, ATA_SECTOR) |
(ATA_IDX_INB(ch, ATA_CYL_LSB) << 8) |
(ATA_IDX_INB(ch, ATA_CYL_MSB) << 16));
}
else {
request->u.ata.count = ATA_IDX_INB(ch, ATA_COUNT);
request->u.ata.lba = ATA_IDX_INB(ch, ATA_SECTOR) |
(ATA_IDX_INB(ch, ATA_CYL_LSB) << 8) |
(ATA_IDX_INB(ch, ATA_CYL_MSB) << 16) |
((ATA_IDX_INB(ch, ATA_DRIVE) & 0xf) << 24);
}
}
static void
ata_tf_write(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(request->parent);
if (request->flags & ATA_R_48BIT) {
ATA_IDX_OUTB(ch, ATA_FEATURE, request->u.ata.feature >> 8);
ATA_IDX_OUTB(ch, ATA_FEATURE, request->u.ata.feature);
ATA_IDX_OUTB(ch, ATA_COUNT, request->u.ata.count >> 8);
ATA_IDX_OUTB(ch, ATA_COUNT, request->u.ata.count);
ATA_IDX_OUTB(ch, ATA_SECTOR, request->u.ata.lba >> 24);
ATA_IDX_OUTB(ch, ATA_SECTOR, request->u.ata.lba);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->u.ata.lba >> 32);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->u.ata.lba >> 8);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->u.ata.lba >> 40);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->u.ata.lba >> 16);
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_LBA | ATA_DEV(request->unit));
}
else {
ATA_IDX_OUTB(ch, ATA_FEATURE, request->u.ata.feature);
ATA_IDX_OUTB(ch, ATA_COUNT, request->u.ata.count);
ATA_IDX_OUTB(ch, ATA_SECTOR, request->u.ata.lba);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->u.ata.lba >> 8);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->u.ata.lba >> 16);
ATA_IDX_OUTB(ch, ATA_DRIVE,
ATA_D_IBM | ATA_D_LBA | ATA_DEV(request->unit) |
((request->u.ata.lba >> 24) & 0x0f));
}
}
static void
ata_pio_read(struct ata_request *request, int length)
{
struct ata_channel *ch = device_get_softc(request->parent);
struct bio *bio;
uint8_t *addr;
vm_offset_t page;
int todo, done, off, moff, resid, size, i;
uint8_t buf[2] __aligned(2);
todo = min(request->transfersize, length);
page = done = resid = 0;
while (done < todo) {
size = todo - done;
/* Prepare data address and limit size (if not sequential). */
off = request->donecount + done;
if ((request->flags & ATA_R_DATA_IN_CCB) == 0 ||
(request->ccb->ccb_h.flags & CAM_DATA_MASK) == CAM_DATA_VADDR) {
addr = (uint8_t *)request->data + off;
} else if ((request->ccb->ccb_h.flags & CAM_DATA_MASK) == CAM_DATA_BIO) {
bio = (struct bio *)request->data;
if ((bio->bio_flags & BIO_UNMAPPED) == 0) {
addr = (uint8_t *)bio->bio_data + off;
} else {
moff = bio->bio_ma_offset + off;
page = pmap_quick_enter_page(
bio->bio_ma[moff / PAGE_SIZE]);
moff %= PAGE_SIZE;
size = min(size, PAGE_SIZE - moff);
addr = (void *)(page + moff);
}
} else
panic("ata_pio_read: Unsupported CAM data type %x\n",
(request->ccb->ccb_h.flags & CAM_DATA_MASK));
/* We may have extra byte already read but not stored. */
if (resid) {
addr[0] = buf[1];
addr++;
done++;
size--;
}
/* Process main part of data. */
resid = size % 2;
if (__predict_false((ch->flags & ATA_USE_16BIT) ||
(size % 4) != 0 || ((uintptr_t)addr % 4) != 0)) {
#ifndef __NO_STRICT_ALIGNMENT
if (__predict_false((uintptr_t)addr % 2)) {
for (i = 0; i + 1 < size; i += 2) {
*(uint16_t *)&buf =
ATA_IDX_INW_STRM(ch, ATA_DATA);
addr[i] = buf[0];
addr[i + 1] = buf[1];
}
} else
#endif
ATA_IDX_INSW_STRM(ch, ATA_DATA, (void*)addr,
size / 2);
/* If we have extra byte of data, leave it for later. */
if (resid) {
*(uint16_t *)&buf =
ATA_IDX_INW_STRM(ch, ATA_DATA);
addr[size - 1] = buf[0];
}
} else
ATA_IDX_INSL_STRM(ch, ATA_DATA, (void*)addr, size / 4);
if (page) {
pmap_quick_remove_page(page);
page = 0;
}
done += size;
}
if (length > done) {
device_printf(request->parent,
"WARNING - %s read data overrun %d > %d\n",
ata_cmd2str(request), length, done);
for (i = done + resid; i < length; i += 2)
ATA_IDX_INW(ch, ATA_DATA);
}
}
static void
ata_pio_write(struct ata_request *request, int length)
{
struct ata_channel *ch = device_get_softc(request->parent);
struct bio *bio;
uint8_t *addr;
vm_offset_t page;
int todo, done, off, moff, resid, size, i;
uint8_t buf[2] __aligned(2);
todo = min(request->transfersize, length);
page = done = resid = 0;
while (done < todo) {
size = todo - done;
/* Prepare data address and limit size (if not sequential). */
off = request->donecount + done;
if ((request->flags & ATA_R_DATA_IN_CCB) == 0 ||
(request->ccb->ccb_h.flags & CAM_DATA_MASK) == CAM_DATA_VADDR) {
addr = (uint8_t *)request->data + off;
} else if ((request->ccb->ccb_h.flags & CAM_DATA_MASK) == CAM_DATA_BIO) {
bio = (struct bio *)request->data;
if ((bio->bio_flags & BIO_UNMAPPED) == 0) {
addr = (uint8_t *)bio->bio_data + off;
} else {
moff = bio->bio_ma_offset + off;
page = pmap_quick_enter_page(
bio->bio_ma[moff / PAGE_SIZE]);
moff %= PAGE_SIZE;
size = min(size, PAGE_SIZE - moff);
addr = (void *)(page + moff);
}
} else
panic("ata_pio_write: Unsupported CAM data type %x\n",
(request->ccb->ccb_h.flags & CAM_DATA_MASK));
/* We may have extra byte to be written first. */
if (resid) {
buf[1] = addr[0];
ATA_IDX_OUTW_STRM(ch, ATA_DATA, *(uint16_t *)&buf);
addr++;
done++;
size--;
}
/* Process main part of data. */
resid = size % 2;
if (__predict_false((ch->flags & ATA_USE_16BIT) ||
(size % 4) != 0 || ((uintptr_t)addr % 4) != 0)) {
#ifndef __NO_STRICT_ALIGNMENT
if (__predict_false((uintptr_t)addr % 2)) {
for (i = 0; i + 1 < size; i += 2) {
buf[0] = addr[i];
buf[1] = addr[i + 1];
ATA_IDX_OUTW_STRM(ch, ATA_DATA,
*(uint16_t *)&buf);
}
} else
#endif
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (void*)addr,
size / 2);
/* If we have extra byte of data, save it for later. */
if (resid)
buf[0] = addr[size - 1];
} else
ATA_IDX_OUTSL_STRM(ch, ATA_DATA,
(void*)addr, size / sizeof(int32_t));
if (page) {
pmap_quick_remove_page(page);
page = 0;
}
done += size;
}
/* We may have extra byte of data to be written. Pad it with zero. */
if (resid) {
buf[1] = 0;
ATA_IDX_OUTW_STRM(ch, ATA_DATA, *(uint16_t *)&buf);
}
if (length > done) {
device_printf(request->parent,
"WARNING - %s write data underrun %d > %d\n",
ata_cmd2str(request), length, done);
for (i = done + resid; i < length; i += 2)
ATA_IDX_OUTW(ch, ATA_DATA, 0);
}
}
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