static void
ata_interrupt_locked(void *data)
{
struct ata_channel *ch = (struct ata_channel *)data;
struct ata_request *request;
/* ignore interrupt if its not for us */
if (ch->hw.status && !ch->hw.status(ch->dev))
return;
/* do we have a running request */
if (!(request = ch->running))
return;
ATA_DEBUG_RQ(request, "interrupt");
/* safetycheck for the right state */
if (ch->state == ATA_IDLE) {
device_printf(request->dev, "interrupt on idle channel ignored\n");
return;
}
/*
* we have the HW locks, so end the transaction for this request
* if it finishes immediately otherwise wait for next interrupt
*/
if (ch->hw.end_transaction(request) == ATA_OP_FINISHED) {
ch->running = NULL;
if (ch->state == ATA_ACTIVE)
ch->state = ATA_IDLE;
ata_cam_end_transaction(ch->dev, request);
return;
}
}
void
ata_timeout(struct ata_request *request)
{
struct ata_channel *ch;
ch = device_get_softc(request->parent);
//request->flags |= ATA_R_DEBUG;
ATA_DEBUG_RQ(request, "timeout");
/*
* If we have an ATA_ACTIVE request running, we flag the request
* ATA_R_TIMEOUT so ata_cam_end_transaction() will handle it correctly.
* Also, NULL out the running request so we wont loose the race with
* an eventual interrupt arriving late.
*/
if (ch->state == ATA_ACTIVE) {
request->flags |= ATA_R_TIMEOUT;
if (ch->dma.unload)
ch->dma.unload(request);
ch->running = NULL;
ch->state = ATA_IDLE;
ata_cam_end_transaction(ch->dev, request);
}
mtx_unlock(&ch->state_mtx);
}
int
ata_interrupt(void *data)
{
struct ata_channel *ch = (struct ata_channel *)data;
struct ata_request *request;
lockmgr(&ch->state_mtx, LK_EXCLUSIVE);
do {
/*
* Ignore interrupt if its not for us. This may also have the
* side effect of processing events unrelated to I/O requests.
*/
if (ch->hw.status && !ch->hw.status(ch->dev))
break;
/*
* Check if we have a running request, and make sure it has been
* completely queued. Otherwise the channel status may indicate
* not-busy when, in fact, the command had not yet been issued.
*/
if ((request = ch->running) == NULL)
break;
if ((request->flags & ATA_R_HWCMDQUEUED) == 0) {
kprintf("ata_interrupt: early interrupt\n");
break;
}
ATA_DEBUG_RQ(request, "interrupt");
/* safetycheck for the right state */
if (ch->state == ATA_IDLE) {
device_printf(request->dev, "interrupt on idle channel ignored\n");
break;
}
/*
* we have the HW locks, so end the transaction for this request
* if it finishes immediately otherwise wait for next interrupt
*/
if (ch->hw.end_transaction(request) == ATA_OP_FINISHED) {
ch->running = NULL;
if (ch->state == ATA_ACTIVE)
ch->state = ATA_IDLE;
lockmgr(&ch->state_mtx, LK_RELEASE);
ATA_LOCKING(ch->dev, ATA_LF_UNLOCK);
ata_finish(request);
return 1;
}
} while (0);
lockmgr(&ch->state_mtx, LK_RELEASE);
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 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;
}
int
ata_dmaunload(struct ata_request *request)
{
ATA_DEBUG_RQ(request, "dmaunload");
if (request->dma) {
bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,
(request->flags & ATA_R_READ) ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(request->dma->data_tag, request->dma->data_map);
request->dma = NULL;
}
return 0;
}
void
ata_interrupt(void *data)
{
struct ata_channel *ch = (struct ata_channel *)data;
struct ata_request *request;
mtx_lock(&ch->state_mtx);
do {
/* ignore interrupt if its not for us */
if (ch->hw.status && !ch->hw.status(ch->dev))
break;
/* do we have a running request */
if (!(request = ch->running))
break;
ATA_DEBUG_RQ(request, "interrupt");
/* safetycheck for the right state */
if (ch->state == ATA_IDLE) {
device_printf(request->dev, "interrupt on idle channel ignored\n");
break;
}
/*
* we have the HW locks, so end the transaction for this request
* if it finishes immediately otherwise wait for next 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;
}
} while (0);
mtx_unlock(&ch->state_mtx);
}
/* 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);
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;
/* on control commands read back registers to the request struct */
if (request->flags & ATA_R_CONTROL) {
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;
/* 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;
}
static int
ata_dmaload(struct ata_request *request, void *addr, int *entries)
{
struct ata_channel *ch = device_get_softc(request->parent);
struct ata_dmasetprd_args dspa;
int error;
ATA_DEBUG_RQ(request, "dmaload");
if (request->dma) {
device_printf(request->parent,
"FAILURE - already active DMA on this device\n");
return EIO;
}
if (!request->bytecount) {
device_printf(request->parent,
"FAILURE - zero length DMA transfer attempted\n");
return EIO;
}
if (request->bytecount & (ch->dma.alignment - 1)) {
device_printf(request->parent,
"FAILURE - odd-sized DMA transfer attempt %d %% %d\n",
request->bytecount, ch->dma.alignment);
return EIO;
}
if (request->bytecount > ch->dma.max_iosize) {
device_printf(request->parent,
"FAILURE - oversized DMA transfer attempt %d > %d\n",
request->bytecount, ch->dma.max_iosize);
return EIO;
}
/* set our slot. XXX SOS NCQ will change that */
request->dma = &ch->dma.slot[0];
if (addr)
dspa.dmatab = addr;
else
dspa.dmatab = request->dma->sg;
if (request->flags & ATA_R_DATA_IN_CCB)
error = bus_dmamap_load_ccb(request->dma->data_tag,
request->dma->data_map, request->ccb,
ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);
else
error = bus_dmamap_load(request->dma->data_tag, request->dma->data_map,
request->data, request->bytecount,
ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);
if (error || (error = dspa.error)) {
device_printf(request->parent, "FAILURE - load data\n");
goto error;
}
if (entries)
*entries = dspa.nsegs;
bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,
BUS_DMASYNC_PREWRITE);
bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,
(request->flags & ATA_R_READ) ?
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
return 0;
error:
ata_dmaunload(request);
return EIO;
}
/* must be called with ATA channel locked */
static int
ata_transaction(struct ata_request *request)
{
/* safety check, device might have been detached FIXME SOS */
if (!request->device->param) {
request->result = ENXIO;
return ATA_OP_FINISHED;
}
/* record the request as running */
request->device->channel->running = request;
ATA_DEBUG_RQ(request, "transaction");
/* disable ATAPI DMA writes if HW doesn't support it */
if ((request->device->channel->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 (ata_command(request->device, request->u.ata.command,
request->u.ata.lba, request->u.ata.count,
request->u.ata.feature)) {
ata_prtdev(request->device, "error issueing PIO command\n");
request->result = EIO;
break;
}
/* if write command output the data */
if (write) {
if (ata_wait(request->device,
(ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
ata_prtdev(request->device,"timeout waiting for write DRQ");
request->result = EIO;
break;
}
ata_pio_write(request, request->transfersize);
}
}
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* check sanity, setup SG list and DMA engine */
if (request->device->channel->dma->load(request->device,
request->data,
request->bytecount,
request->flags & ATA_R_READ)) {
ata_prtdev(request->device, "setting up DMA failed\n");
request->result = EIO;
break;
}
/* issue command */
if (ata_command(request->device, request->u.ata.command,
request->u.ata.lba, request->u.ata.count,
request->u.ata.feature)) {
ata_prtdev(request->device, "error issuing DMA command\n");
request->result = EIO;
break;
}
/* start DMA engine */
if (request->device->channel->dma->start(request->device->channel)) {
ata_prtdev(request->device, "error starting DMA\n");
request->result = EIO;
break;
}
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
/* 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(request->device->channel, ATA_DRIVE,
ATA_D_IBM | request->device->unit);
DELAY(10);
if (!(ATA_IDX_INB(request->device->channel, ATA_ALTSTAT)&ATA_S_DSC))
request->result = EBUSY;
break;
}
/* start ATAPI operation */
if (ata_command(request->device, ATA_PACKET_CMD,
request->transfersize << 8, 0, 0)) {
ata_prtdev(request->device, "error issuing ATA PACKET command\n");
request->result = EIO;
break;
}
/* command interrupt device ? just return and wait for interrupt */
if ((request->device->param->config & ATA_DRQ_MASK) == ATA_DRQ_INTR)
return ATA_OP_CONTINUES;
/* wait for ready to write ATAPI command block */
{
int timeout = 5000; /* might be less for fast devices */
while (timeout--) {
int reason = ATA_IDX_INB(request->device->channel, ATA_IREASON);
int status = ATA_IDX_INB(request->device->channel, 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) {
ata_prtdev(request->device,
"timeout waiting for ATAPI ready\n");
request->result = EIO;
break;
}
}
/* this seems to be needed for some (slow) devices */
DELAY(10);
/* output actual command block */
ATA_IDX_OUTSW_STRM(request->device->channel, ATA_DATA,
(int16_t *)request->u.atapi.ccb,
(request->device->param->config & ATA_PROTO_MASK) ==
ATA_PROTO_ATAPI_12 ? 6 : 8);
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
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(request->device->channel, ATA_DRIVE,
ATA_D_IBM | request->device->unit);
DELAY(10);
if (!(ATA_IDX_INB(request->device->channel, ATA_ALTSTAT)&ATA_S_DSC))
request->result = EBUSY;
break;
}
/* check sanity, setup SG list and DMA engine */
if (request->device->channel->dma->load(request->device,
request->data,
request->bytecount,
request->flags & ATA_R_READ)) {
ata_prtdev(request->device, "setting up DMA failed\n");
request->result = EIO;
break;
}
/* start ATAPI operation */
if (ata_command(request->device, ATA_PACKET_CMD, 0, 0, ATA_F_DMA)) {
ata_prtdev(request->device, "error issuing ATAPI packet command\n");
request->result = EIO;
break;
}
/* wait for ready to write ATAPI command block */
{
int timeout = 5000; /* might be less for fast devices */
while (timeout--) {
int reason = ATA_IDX_INB(request->device->channel, ATA_IREASON);
int status = ATA_IDX_INB(request->device->channel, 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) {
ata_prtdev(request->device,"timeout waiting for ATAPI ready\n");
request->result = EIO;
break;
}
}
/* this seems to be needed for some (slow) devices */
DELAY(10);
/* output actual command block */
ATA_IDX_OUTSW_STRM(request->device->channel, ATA_DATA,
(int16_t *)request->u.atapi.ccb,
(request->device->param->config & ATA_PROTO_MASK) ==
ATA_PROTO_ATAPI_12 ? 6 : 8);
/* start DMA engine */
if (request->device->channel->dma->start(request->device->channel)) {
request->result = EIO;
break;
}
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
}
/* request finish here */
if (request->device->channel->dma->flags & ATA_DMA_ACTIVE)
request->device->channel->dma->unload(request->device->channel);
request->device->channel->running = NULL;
return ATA_OP_FINISHED;
}
static void
ata_interrupt(void *data)
{
struct ata_channel *ch = (struct ata_channel *)data;
struct ata_request *request = ch->running;
int length;
/* ignore this interrupt if there is no running request */
if (!request) {
if (ATA_LOCK_CH(ch, ATA_CONTROL)) {
u_int8_t status = ATA_IDX_INB(ch, ATA_STATUS);
u_int8_t error = ATA_IDX_INB(ch, ATA_ERROR);
if (bootverbose)
ata_printf(ch, -1,
"spurious interrupt - status=0x%02x error=0x%02x\n",
status, error);
ATA_UNLOCK_CH(ch);
}
else {
if (bootverbose)
ata_printf(ch, -1, "spurious interrupt - channel busy\n");
}
return;
}
ATA_DEBUG_RQ(request, "interrupt");
/* ignore interrupt if device is busy */
if (!(request->flags & ATA_R_TIMEOUT) &&
ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
DELAY(100);
if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DRQ))
return;
}
ATA_DEBUG_RQ(request, "interrupt accepted");
/* clear interrupt and get status */
request->status = ATA_IDX_INB(ch, ATA_STATUS);
request->flags |= ATA_R_INTR_SEEN;
switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_CONTROL)) {
/* ATA PIO data transfer and control commands */
default:
/* on control commands read back registers to the request struct */
if (request->flags & ATA_R_CONTROL) {
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);
}
/* 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);
break;
}
/* are we moving data ? */
if (request->flags & (ATA_R_READ | ATA_R_WRITE)) {
/* if read data get it */
if (request->flags & ATA_R_READ)
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);
/* clear interrupt seen flag as we need to wait again */
request->flags &= ~ATA_R_INTR_SEEN;
/* 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(request->device,
(ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
ata_prtdev(request->device,
"timeout waiting for write DRQ");
request->status = ATA_IDX_INB(ch, ATA_STATUS);
break;
}
/* output data and return waiting for new interrupt */
ata_pio_write(request, request->transfersize);
return;
}
/* if data read command, return & wait for interrupt */
if (request->flags & ATA_R_READ)
return;
}
}
/* done with HW */
break;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* stop DMA engine and get status */
request->dmastat = ch->dma->stop(ch);
/* did we get error or data */
if (request->status & ATA_S_ERROR)
request->error = ATA_IDX_INB(ch, ATA_ERROR);
else if (request->dmastat & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else
request->donecount = request->bytecount;
/* release SG list etc */
ch->dma->unload(ch);
/* done with HW */
break;
/* ATAPI PIO commands */
case ATA_R_ATAPI:
length = ATA_IDX_INB(ch, ATA_CYL_LSB)|(ATA_IDX_INB(ch, ATA_CYL_MSB)<<8);
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)) {
ata_prtdev(request->device, "command interrupt without DRQ\n");
request->status = ATA_S_ERROR;
break;
}
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
(request->device->param->config &
ATA_PROTO_MASK)== ATA_PROTO_ATAPI_12 ? 6 : 8);
/* return wait for interrupt */
return;
case ATAPI_P_WRITE:
if (request->flags & ATA_R_READ) {
request->status = ATA_S_ERROR;
ata_prtdev(request->device,
"%s trying to write on read buffer\n",
ata_cmd2str(request));
break;
}
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 */
return;
case ATAPI_P_READ:
if (request->flags & ATA_R_WRITE) {
request->status = ATA_S_ERROR;
ata_prtdev(request->device,
"%s trying to read on write buffer\n",
ata_cmd2str(request));
break;
}
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 */
return;
case ATAPI_P_DONEDRQ:
ata_prtdev(request->device,
"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);
break;
default:
ata_prtdev(request->device, "unknown transfer phase\n");
request->status = ATA_S_ERROR;
}
/* done with HW */
break;
/* ATAPI DMA commands */
case ATA_R_ATAPI|ATA_R_DMA:
/* stop the engine and get engine status */
request->dmastat = ch->dma->stop(ch);
/* 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->dmastat & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else
request->donecount = request->bytecount;
/* release SG list etc */
ch->dma->unload(ch);
/* done with HW */
break;
}
/* if we timed out the unlocking of the ATA channel is done later */
if (!(request->flags & ATA_R_TIMEOUT)) {
ch->running = NULL;
ATA_UNLOCK_CH(ch);
ch->locking(ch, ATA_LF_UNLOCK);
}
/* schedule completition for this request */
ata_finish(request);
}
static int
ata_end_transaction(struct ata_request *request)
{
struct ata_channel *ch = request->device->channel;
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:
/* XXX Doesn't handle the non-PIO case. */
if (request->flags & ATA_R_TIMEOUT)
return ATA_OP_FINISHED;
/* on control commands read back registers to the request struct */
if (request->flags & ATA_R_CONTROL) {
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) & 0x0f) << 24);
}
/* 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);
return ATA_OP_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)
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);
/* clear interrupt seen flag as we need to wait again */
request->flags &= ~ATA_R_INTR_SEEN;
/* 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(request->device,
(ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
ata_prtdev(request->device,
"timeout waiting for write DRQ");
request->status = ATA_IDX_INB(ch, ATA_STATUS);
return ATA_OP_FINISHED;
}
/* output data and return waiting for new interrupt */
ata_pio_write(request, request->transfersize);
return ATA_OP_CONTINUES;
}
/* if data read command, return & wait for interrupt */
if (request->flags & ATA_R_READ)
return ATA_OP_CONTINUES;
}
}
/* done with HW */
return ATA_OP_FINISHED;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* stop DMA engine and get status */
if (ch->dma->stop)
request->dmastat = ch->dma->stop(ch);
/* did we get error or data */
if (request->status & ATA_S_ERROR)
request->error = ATA_IDX_INB(ch, ATA_ERROR);
else if (request->dmastat & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else
request->donecount = request->bytecount;
/* release SG list etc */
ch->dma->unload(ch);
/* done with HW */
return ATA_OP_FINISHED;
/* ATAPI PIO commands */
case ATA_R_ATAPI:
length = ATA_IDX_INB(ch, ATA_CYL_LSB)|(ATA_IDX_INB(ch, ATA_CYL_MSB)<<8);
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)) {
ata_prtdev(request->device, "command interrupt without DRQ\n");
request->status = ATA_S_ERROR;
return ATA_OP_FINISHED;
}
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
(request->device->param->config &
ATA_PROTO_MASK)== ATA_PROTO_ATAPI_12 ? 6 : 8);
/* return wait for interrupt */
return ATA_OP_CONTINUES;
case ATAPI_P_WRITE:
if (request->flags & ATA_R_READ) {
request->status = ATA_S_ERROR;
ata_prtdev(request->device,
"%s trying to write on read buffer\n",
ata_cmd2str(request));
return ATA_OP_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 */
return ATA_OP_CONTINUES;
case ATAPI_P_READ:
if (request->flags & ATA_R_WRITE) {
request->status = ATA_S_ERROR;
ata_prtdev(request->device,
"%s trying to read on write buffer\n",
ata_cmd2str(request));
return ATA_OP_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 */
return ATA_OP_CONTINUES;
case ATAPI_P_DONEDRQ:
ata_prtdev(request->device,
"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);
return ATA_OP_FINISHED;
default:
ata_prtdev(request->device, "unknown transfer phase\n");
request->status = ATA_S_ERROR;
}
/* done with HW */
return ATA_OP_FINISHED;
/* ATAPI DMA commands */
case ATA_R_ATAPI|ATA_R_DMA:
/* stop the engine and get engine status */
if (ch->dma->stop)
request->dmastat = ch->dma->stop(ch);
/* 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->dmastat & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else
request->donecount = request->bytecount;
/* release SG list etc */
ch->dma->unload(ch);
/* done with HW */
return ATA_OP_FINISHED;
}
}
