/* Thread to carry out delayed SCSI-device scanning */
static int rtsx_scan_thread(void *__dev)
{
struct rtsx_dev *dev = __dev;
struct rtsx_chip *chip = dev->chip;
/* Wait for the timeout to expire or for a disconnect */
if (delay_use > 0) {
dev_info(&dev->pci->dev,
"%s: waiting for device to settle before scanning\n",
CR_DRIVER_NAME);
wait_event_interruptible_timeout(dev->delay_wait,
rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT),
delay_use * HZ);
}
/* If the device is still connected, perform the scanning */
if (!rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
scsi_scan_host(rtsx_to_host(dev));
dev_info(&dev->pci->dev, "%s: device scan complete\n",
CR_DRIVER_NAME);
/* Should we unbind if no devices were detected? */
}
complete_and_exit(&dev->scanning_done, 0);
}
static int rtsx_scan_thread(void * __dev)
{
struct rtsx_dev *dev = (struct rtsx_dev *)__dev;
struct rtsx_chip *chip = dev->chip;
if (delay_use > 0) {
printk(KERN_INFO "%s: waiting for device "
"to settle before scanning\n", CR_DRIVER_NAME);
wait_event_interruptible_timeout(dev->delay_wait,
rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT),
delay_use * HZ);
}
if (!rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
scsi_scan_host(rtsx_to_host(dev));
printk(KERN_INFO "%s: device scan complete\n", CR_DRIVER_NAME);
}
scsi_host_put(rtsx_to_host(dev));
complete_and_exit(&threads_gone, 0);
}
/* This is always called with scsi_lock(host) held */
static int queuecommand_lck(struct scsi_cmnd *srb,
void (*done)(struct scsi_cmnd *))
{
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
struct rtsx_chip *chip = dev->chip;
/* check for state-transition errors */
if (chip->srb) {
dev_err(&dev->pci->dev, "Error: chip->srb = %p\n",
chip->srb);
return SCSI_MLQUEUE_HOST_BUSY;
}
/* fail the command if we are disconnecting */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
dev_info(&dev->pci->dev, "Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
return 0;
}
/* enqueue the command and wake up the control thread */
srb->scsi_done = done;
chip->srb = srb;
complete(&dev->cmnd_ready);
return 0;
}
static int queuecommand_lck(struct scsi_cmnd *srb,
void (*done)(struct scsi_cmnd *))
{
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
struct rtsx_chip *chip = dev->chip;
if (chip->srb != NULL) {
printk(KERN_ERR "Error in %s: chip->srb = %p\n",
__FUNCTION__, chip->srb);
return SCSI_MLQUEUE_HOST_BUSY;
}
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
return 0;
}
srb->scsi_done = done;
chip->srb = srb;
up(&(dev->sema));
return 0;
}
/* This is always called with scsi_lock(host) held */
static int queuecommand_lck(struct scsi_cmnd *srb,
void (*done)(struct scsi_cmnd *))
{
struct rtsx_dev *dev = host_to_rtsx(srb->device->host);
struct rtsx_chip *chip = dev->chip;
/* check for state-transition errors */
if (chip->srb != NULL) {
printk(KERN_ERR "Error in %s: chip->srb = %p\n",
__func__, chip->srb);
return SCSI_MLQUEUE_HOST_BUSY;
}
/* fail the command if we are disconnecting */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
return 0;
}
/* enqueue the command and wake up the control thread */
srb->scsi_done = done;
chip->srb = srb;
up(&(dev->sema));
return 0;
}
static int rtsx_polling_thread(void *__dev)
{
struct rtsx_dev *dev = (struct rtsx_dev *)__dev;
struct rtsx_chip *chip = dev->chip;
struct Scsi_Host *host = rtsx_to_host(dev);
struct sd_info *sd_card = &(chip->sd_card);
struct xd_info *xd_card = &(chip->xd_card);
struct ms_info *ms_card = &(chip->ms_card);
sd_card->cleanup_counter = 0;
xd_card->cleanup_counter = 0;
ms_card->cleanup_counter = 0;
/* Wait until SCSI scan finished */
wait_timeout((delay_use + 5) * 1000);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(POLLING_INTERVAL);
/* lock the device pointers */
mutex_lock(&(dev->dev_mutex));
/* if the device has disconnected, we are free to exit */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "-- rtsx-polling exiting\n");
mutex_unlock(&dev->dev_mutex);
break;
}
mutex_unlock(&dev->dev_mutex);
mspro_polling_format_status(chip);
/* lock the device pointers */
mutex_lock(&(dev->dev_mutex));
rtsx_polling_func(chip);
/* unlock the device pointers */
mutex_unlock(&dev->dev_mutex);
}
scsi_host_put(host);
complete_and_exit(&threads_gone, 0);
}
static int rtsx_polling_thread(void *__dev)
{
struct rtsx_dev *dev = __dev;
struct rtsx_chip *chip = dev->chip;
struct sd_info *sd_card = &chip->sd_card;
struct xd_info *xd_card = &chip->xd_card;
struct ms_info *ms_card = &chip->ms_card;
sd_card->cleanup_counter = 0;
xd_card->cleanup_counter = 0;
ms_card->cleanup_counter = 0;
/* Wait until SCSI scan finished */
wait_timeout((delay_use + 5) * 1000);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(msecs_to_jiffies(POLLING_INTERVAL));
/* lock the device pointers */
mutex_lock(&dev->dev_mutex);
/* if the device has disconnected, we are free to exit */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
dev_info(&dev->pci->dev, "-- rtsx-polling exiting\n");
mutex_unlock(&dev->dev_mutex);
break;
}
mutex_unlock(&dev->dev_mutex);
mspro_polling_format_status(chip);
/* lock the device pointers */
mutex_lock(&dev->dev_mutex);
rtsx_polling_func(chip);
/* unlock the device pointers */
mutex_unlock(&dev->dev_mutex);
}
complete_and_exit(&dev->polling_exit, 0);
}
static int rtsx_polling_thread(void * __dev)
{
struct rtsx_dev *dev = (struct rtsx_dev *)__dev;
struct rtsx_chip *chip = dev->chip;
struct Scsi_Host *host = rtsx_to_host(dev);
struct sd_info *sd_card = &(chip->sd_card);
struct xd_info *xd_card = &(chip->xd_card);
struct ms_info *ms_card = &(chip->ms_card);
sd_card->cleanup_counter = 0;
xd_card->cleanup_counter = 0;
ms_card->cleanup_counter = 0;
wait_timeout((delay_use + 5) * 1000);
for(;;) {
wait_timeout(POLLING_INTERVAL);
mutex_lock(&(dev->dev_mutex));
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "-- rtsx-polling exiting\n");
mutex_unlock(&dev->dev_mutex);
break;
}
mutex_unlock(&dev->dev_mutex);
mspro_polling_format_status(chip);
mutex_lock(&(dev->dev_mutex));
rtsx_polling_func(chip);
mutex_unlock(&dev->dev_mutex);
}
scsi_host_put(host);
complete_and_exit(&threads_gone, 0);
}
static int rtsx_control_thread(void *__dev)
{
struct rtsx_dev *dev = __dev;
struct rtsx_chip *chip = dev->chip;
struct Scsi_Host *host = rtsx_to_host(dev);
for (;;) {
if (wait_for_completion_interruptible(&dev->cmnd_ready))
break;
/* lock the device pointers */
mutex_lock(&(dev->dev_mutex));
/* if the device has disconnected, we are free to exit */
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
dev_info(&dev->pci->dev, "-- rtsx-control exiting\n");
mutex_unlock(&dev->dev_mutex);
break;
}
/* lock access to the state */
scsi_lock(host);
/* has the command aborted ? */
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
chip->srb->result = DID_ABORT << 16;
goto SkipForAbort;
}
scsi_unlock(host);
/* reject the command if the direction indicator
* is UNKNOWN
*/
if (chip->srb->sc_data_direction == DMA_BIDIRECTIONAL) {
dev_err(&dev->pci->dev, "UNKNOWN data direction\n");
chip->srb->result = DID_ERROR << 16;
}
/* reject if target != 0 or if LUN is higher than
* the maximum known LUN
*/
else if (chip->srb->device->id) {
dev_err(&dev->pci->dev, "Bad target number (%d:%d)\n",
chip->srb->device->id,
(u8)chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else if (chip->srb->device->lun > chip->max_lun) {
dev_err(&dev->pci->dev, "Bad LUN (%d:%d)\n",
chip->srb->device->id,
(u8)chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
/* we've got a command, let's do it! */
else {
scsi_show_command(chip);
rtsx_invoke_transport(chip->srb, chip);
}
/* lock access to the state */
scsi_lock(host);
/* did the command already complete because of a disconnect? */
if (!chip->srb)
; /* nothing to do */
/* indicate that the command is done */
else if (chip->srb->result != DID_ABORT << 16) {
chip->srb->scsi_done(chip->srb);
} else {
SkipForAbort:
dev_err(&dev->pci->dev, "scsi command aborted\n");
}
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
complete(&(dev->notify));
rtsx_set_stat(chip, RTSX_STAT_IDLE);
}
/* finished working on this command */
chip->srb = NULL;
scsi_unlock(host);
/* unlock the device pointers */
mutex_unlock(&dev->dev_mutex);
} /* for (;;) */
/* notify the exit routine that we're actually exiting now
*
* complete()/wait_for_completion() is similar to up()/down(),
* except that complete() is safe in the case where the structure
* is getting deleted in a parallel mode of execution (i.e. just
* after the down() -- that's necessary for the thread-shutdown
* case.
*
* complete_and_exit() goes even further than this -- it is safe in
* the case that the thread of the caller is going away (not just
* the structure) -- this is necessary for the module-remove case.
* This is important in preemption kernels, which transfer the flow
* of execution immediately upon a complete().
*/
complete_and_exit(&dev->control_exit, 0);
}
static int rtsx_control_thread(void * __dev)
{
struct rtsx_dev *dev = (struct rtsx_dev *)__dev;
struct rtsx_chip *chip = dev->chip;
struct Scsi_Host *host = rtsx_to_host(dev);
current->flags |= PF_NOFREEZE;
for(;;) {
if(down_interruptible(&dev->sema))
break;
mutex_lock(&(dev->dev_mutex));
if (rtsx_chk_stat(chip, RTSX_STAT_DISCONNECT)) {
printk(KERN_INFO "-- rtsx-control exiting\n");
mutex_unlock(&dev->dev_mutex);
break;
}
scsi_lock(host);
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
chip->srb->result = DID_ABORT << 16;
goto SkipForAbort;
}
scsi_unlock(host);
/* reject the command if the direction indicator
* is UNKNOWN
*/
if (chip->srb->sc_data_direction == DMA_BIDIRECTIONAL) {
printk(KERN_ERR "UNKNOWN data direction\n");
chip->srb->result = DID_ERROR << 16;
}
/* reject if target != 0 or if LUN is higher than
* the maximum known LUN
*/
else if (chip->srb->device->id) {
printk(KERN_ERR "Bad target number (%d:%d)\n",
chip->srb->device->id, chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else if (chip->srb->device->lun > chip->max_lun) {
printk(KERN_ERR "Bad LUN (%d:%d)\n",
chip->srb->device->id, chip->srb->device->lun);
chip->srb->result = DID_BAD_TARGET << 16;
}
else {
RTSX_DEBUG(scsi_show_command(chip->srb));
rtsx_invoke_transport(chip->srb, chip);
}
scsi_lock(host);
if (!chip->srb)
;
else if (chip->srb->result != DID_ABORT << 16) {
chip->srb->scsi_done(chip->srb);
} else {
SkipForAbort:
printk(KERN_ERR "scsi command aborted\n");
}
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
complete(&(dev->notify));
rtsx_set_stat(chip, RTSX_STAT_IDLE);
}
chip->srb = NULL;
scsi_unlock(host);
mutex_unlock(&dev->dev_mutex);
}
scsi_host_put(host);
/* notify the exit routine that we're actually exiting now
*
* complete()/wait_for_completion() is similar to up()/down(),
* except that complete() is safe in the case where the structure
* is getting deleted in a parallel mode of execution (i.e. just
* after the down() -- that's necessary for the thread-shutdown
* case.
*
* complete_and_exit() goes even further than this -- it is safe in
* the case that the thread of the caller is going away (not just
* the structure) -- this is necessary for the module-remove case.
* This is important in preemption kernels, which transfer the flow
* of execution immediately upon a complete().
*/
complete_and_exit(&threads_gone, 0);
}
