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[S390] cio: provide functions for fcx enabled I/O

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Provide functions for assembling and starting fcx enabled I/O request
blocks.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Peter Oberparleiter
2008-07-14 09:58:51 +02:00
committed by Heiko Carstens
parent 23d805b647
commit 83262d6349
11 changed files with 938 additions and 37 deletions
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47
drivers/s390/cio/device_fsm.c
View File

@@ -39,31 +39,43 @@ static void ccw_timeout_log(struct ccw_device *cdev)
struct schib schib;
struct subchannel *sch;
struct io_subchannel_private *private;
union orb *orb;
int cc;
sch = to_subchannel(cdev->dev.parent);
private = to_io_private(sch);
orb = &private->orb;
cc = stsch(sch->schid, &schib);
printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
"device information:\n", get_clock());
printk(KERN_WARNING "cio: orb:\n");
print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
&private->orb, sizeof(private->orb), 0);
orb, sizeof(*orb), 0);
printk(KERN_WARNING "cio: ccw device bus id: %s\n", cdev->dev.bus_id);
printk(KERN_WARNING "cio: subchannel bus id: %s\n", sch->dev.bus_id);
printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
"vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
if ((void *)(addr_t)private->orb.cpa == &private->sense_ccw ||
(void *)(addr_t)private->orb.cpa == cdev->private->iccws)
printk(KERN_WARNING "cio: last channel program (intern):\n");
else
printk(KERN_WARNING "cio: last channel program:\n");
if (orb->tm.b) {
printk(KERN_WARNING "cio: orb indicates transport mode\n");
printk(KERN_WARNING "cio: last tcw:\n");
print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
(void *)(addr_t)orb->tm.tcw,
sizeof(struct tcw), 0);
} else {
printk(KERN_WARNING "cio: orb indicates command mode\n");
if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw ||
(void *)(addr_t)orb->cmd.cpa == cdev->private->iccws)
printk(KERN_WARNING "cio: last channel program "
"(intern):\n");
else
printk(KERN_WARNING "cio: last channel program:\n");
print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
(void *)(addr_t)private->orb.cpa,
sizeof(struct ccw1), 0);
print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
(void *)(addr_t)orb->cmd.cpa,
sizeof(struct ccw1), 0);
}
printk(KERN_WARNING "cio: ccw device state: %d\n",
cdev->private->state);
printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
@@ -135,10 +147,13 @@ ccw_device_cancel_halt_clear(struct ccw_device *cdev)
/* Stage 1: cancel io. */
if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) &&
!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
ret = cio_cancel(sch);
if (ret != -EINVAL)
return ret;
/* cancel io unsuccessful. From now on it is asynchronous. */
if (!scsw_is_tm(&sch->schib.scsw)) {
ret = cio_cancel(sch);
if (ret != -EINVAL)
return ret;
}
/* cancel io unsuccessful or not applicable (transport mode).
* Continue with asynchronous instructions. */
cdev->private->iretry = 3; /* 3 halt retries. */
}
if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
@@ -751,11 +766,13 @@ static void
ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
{
struct irb *irb;
int is_cmd;
irb = (struct irb *) __LC_IRB;
is_cmd = !scsw_is_tm(&irb->scsw);
/* Check for unsolicited interrupt. */
if (!scsw_is_solicited(&irb->scsw)) {
if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
!irb->esw.esw0.erw.cons) {
/* Unit check but no sense data. Need basic sense. */
if (ccw_device_do_sense(cdev, irb) != 0)
@@ -774,7 +791,7 @@ call_handler_unsol:
}
/* Accumulate status and find out if a basic sense is needed. */
ccw_device_accumulate_irb(cdev, irb);
if (cdev->private->flags.dosense) {
if (is_cmd && cdev->private->flags.dosense) {
if (ccw_device_do_sense(cdev, irb) == 0) {
cdev->private->state = DEV_STATE_W4SENSE;
}