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);
- cc = stsch(sch->schid, &schib);
+ orb = &private->orb;
+ cc = stsch_err(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);
- 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);
+ orb, sizeof(*orb), 0);
+ printk(KERN_WARNING "cio: ccw device bus id: %s\n",
+ dev_name(&cdev->dev));
+ printk(KERN_WARNING "cio: subchannel bus id: %s\n",
+ dev_name(&sch->dev));
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");
-
- print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
- (void *)(addr_t)private->orb.cpa,
- sizeof(struct ccw1), 0);
+ 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)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);
int ret;
sch = to_subchannel(cdev->dev.parent);
- ret = stsch(sch->schid, &sch->schib);
- if (ret || !sch->schib.pmcw.dnv)
+ if (cio_update_schib(sch))
return -ENODEV;
if (!sch->schib.pmcw.ena)
/* Not operational -> done. */
/* 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)) {
panic("Can't stop i/o on subchannel.\n");
}
-static int
-ccw_device_handle_oper(struct ccw_device *cdev)
+void ccw_device_update_sense_data(struct ccw_device *cdev)
{
- struct subchannel *sch;
+ memset(&cdev->id, 0, sizeof(cdev->id));
+ cdev->id.cu_type = cdev->private->senseid.cu_type;
+ cdev->id.cu_model = cdev->private->senseid.cu_model;
+ cdev->id.dev_type = cdev->private->senseid.dev_type;
+ cdev->id.dev_model = cdev->private->senseid.dev_model;
+}
- sch = to_subchannel(cdev->dev.parent);
- cdev->private->flags.recog_done = 1;
- /*
- * Check if cu type and device type still match. If
- * not, it is certainly another device and we have to
- * de- and re-register.
- */
- if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
- cdev->id.cu_model != cdev->private->senseid.cu_model ||
- cdev->id.dev_type != cdev->private->senseid.dev_type ||
- cdev->id.dev_model != cdev->private->senseid.dev_model) {
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_do_unreg_rereg);
- queue_work(ccw_device_work, &cdev->private->kick_work);
- return 0;
- }
- cdev->private->flags.donotify = 1;
- return 1;
+int ccw_device_test_sense_data(struct ccw_device *cdev)
+{
+ return cdev->id.cu_type == cdev->private->senseid.cu_type &&
+ cdev->id.cu_model == cdev->private->senseid.cu_model &&
+ cdev->id.dev_type == cdev->private->senseid.dev_type &&
+ cdev->id.dev_model == cdev->private->senseid.dev_model;
}
/*
ccw_device_recog_done(struct ccw_device *cdev, int state)
{
struct subchannel *sch;
- int notify, old_lpm, same_dev;
+ int old_lpm;
sch = to_subchannel(cdev->dev.parent);
- ccw_device_set_timeout(cdev, 0);
- cio_disable_subchannel(sch);
+ if (cio_disable_subchannel(sch))
+ state = DEV_STATE_NOT_OPER;
/*
* Now that we tried recognition, we have performed device selection
* through ssch() and the path information is up to date.
*/
old_lpm = sch->lpm;
- stsch(sch->schid, &sch->schib);
- sch->lpm = sch->schib.pmcw.pam & sch->opm;
+
/* Check since device may again have become not operational. */
- if (!sch->schib.pmcw.dnv)
+ if (cio_update_schib(sch))
state = DEV_STATE_NOT_OPER;
+ else
+ sch->lpm = sch->schib.pmcw.pam & sch->opm;
+
if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
/* Force reprobe on all chpids. */
old_lpm = 0;
if (sch->lpm != old_lpm)
__recover_lost_chpids(sch, old_lpm);
- if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
- if (state == DEV_STATE_NOT_OPER) {
- cdev->private->flags.recog_done = 1;
- cdev->private->state = DEV_STATE_DISCONNECTED;
- return;
- }
- /* Boxed devices don't need extra treatment. */
+ if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID &&
+ (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) {
+ cdev->private->flags.recog_done = 1;
+ cdev->private->state = DEV_STATE_DISCONNECTED;
+ wake_up(&cdev->private->wait_q);
+ return;
+ }
+ if (cdev->private->flags.resuming) {
+ cdev->private->state = state;
+ cdev->private->flags.recog_done = 1;
+ wake_up(&cdev->private->wait_q);
+ return;
}
- notify = 0;
- same_dev = 0; /* Keep the compiler quiet... */
switch (state) {
case DEV_STATE_NOT_OPER:
- CIO_MSG_EVENT(2, "SenseID : unknown device %04x on "
- "subchannel 0.%x.%04x\n",
- cdev->private->dev_id.devno,
- sch->schid.ssid, sch->schid.sch_no);
break;
case DEV_STATE_OFFLINE:
- if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
- same_dev = ccw_device_handle_oper(cdev);
- notify = 1;
+ if (!cdev->online) {
+ ccw_device_update_sense_data(cdev);
+ break;
}
- /* fill out sense information */
- memset(&cdev->id, 0, sizeof(cdev->id));
- cdev->id.cu_type = cdev->private->senseid.cu_type;
- cdev->id.cu_model = cdev->private->senseid.cu_model;
- cdev->id.dev_type = cdev->private->senseid.dev_type;
- cdev->id.dev_model = cdev->private->senseid.dev_model;
- if (notify) {
- cdev->private->state = DEV_STATE_OFFLINE;
- if (same_dev) {
- /* Get device online again. */
- ccw_device_online(cdev);
- wake_up(&cdev->private->wait_q);
- }
- return;
+ cdev->private->state = DEV_STATE_OFFLINE;
+ cdev->private->flags.recog_done = 1;
+ if (ccw_device_test_sense_data(cdev)) {
+ cdev->private->flags.donotify = 1;
+ ccw_device_online(cdev);
+ wake_up(&cdev->private->wait_q);
+ } else {
+ ccw_device_update_sense_data(cdev);
+ ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
}
- /* Issue device info message. */
- CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
- "CU Type/Mod = %04X/%02X, Dev Type/Mod = "
- "%04X/%02X\n",
- cdev->private->dev_id.ssid,
- cdev->private->dev_id.devno,
- cdev->id.cu_type, cdev->id.cu_model,
- cdev->id.dev_type, cdev->id.dev_model);
- break;
+ return;
case DEV_STATE_BOXED:
- CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
- " subchannel 0.%x.%04x\n",
- cdev->private->dev_id.devno,
- sch->schid.ssid, sch->schid.sch_no);
+ if (cdev->id.cu_type != 0) { /* device was recognized before */
+ cdev->private->flags.recog_done = 1;
+ cdev->private->state = DEV_STATE_BOXED;
+ wake_up(&cdev->private->wait_q);
+ return;
+ }
break;
}
cdev->private->state = state;
io_subchannel_recog_done(cdev);
- if (state != DEV_STATE_NOT_OPER)
- wake_up(&cdev->private->wait_q);
+ wake_up(&cdev->private->wait_q);
}
/*
}
}
+/**
+ * ccw_device_notify() - inform the device's driver about an event
+ * @cdev: device for which an event occured
+ * @event: event that occurred
+ *
+ * Returns:
+ * -%EINVAL if the device is offline or has no driver.
+ * -%EOPNOTSUPP if the device's driver has no notifier registered.
+ * %NOTIFY_OK if the driver wants to keep the device.
+ * %NOTIFY_BAD if the driver doesn't want to keep the device.
+ */
int ccw_device_notify(struct ccw_device *cdev, int event)
{
+ int ret = -EINVAL;
+
if (!cdev->drv)
- return 0;
+ goto out;
if (!cdev->online)
- return 0;
- return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0;
+ goto out;
+ CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n",
+ cdev->private->dev_id.ssid, cdev->private->dev_id.devno,
+ event);
+ if (!cdev->drv->notify) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+ if (cdev->drv->notify(cdev, event))
+ ret = NOTIFY_OK;
+ else
+ ret = NOTIFY_BAD;
+out:
+ return ret;
}
-static void
-ccw_device_oper_notify(struct work_struct *work)
+static void ccw_device_oper_notify(struct ccw_device *cdev)
{
- struct ccw_device_private *priv;
- struct ccw_device *cdev;
- int ret;
- unsigned long flags;
-
- priv = container_of(work, struct ccw_device_private, kick_work);
- cdev = priv->cdev;
- ret = ccw_device_notify(cdev, CIO_OPER);
- spin_lock_irqsave(cdev->ccwlock, flags);
- if (ret) {
+ if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) {
/* Reenable channel measurements, if needed. */
- spin_unlock_irqrestore(cdev->ccwlock, flags);
- cmf_reenable(cdev);
- spin_lock_irqsave(cdev->ccwlock, flags);
- wake_up(&cdev->private->wait_q);
+ ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF);
+ return;
}
- spin_unlock_irqrestore(cdev->ccwlock, flags);
- if (!ret)
- /* Driver doesn't want device back. */
- ccw_device_do_unreg_rereg(work);
+ /* Driver doesn't want device back. */
+ ccw_device_set_notoper(cdev);
+ ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
}
/*
cdev->private->state = state;
-
- if (state == DEV_STATE_BOXED)
+ switch (state) {
+ case DEV_STATE_BOXED:
CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
cdev->private->dev_id.devno, sch->schid.sch_no);
-
- if (cdev->private->flags.donotify) {
+ if (cdev->online &&
+ ccw_device_notify(cdev, CIO_BOXED) != NOTIFY_OK)
+ ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
cdev->private->flags.donotify = 0;
- PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify);
- queue_work(ccw_device_notify_work, &cdev->private->kick_work);
- }
- wake_up(&cdev->private->wait_q);
-
- if (css_init_done && state != DEV_STATE_ONLINE)
- put_device (&cdev->dev);
-}
-
-static int cmp_pgid(struct pgid *p1, struct pgid *p2)
-{
- char *c1;
- char *c2;
-
- c1 = (char *)p1;
- c2 = (char *)p2;
-
- return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
-}
-
-static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
-{
- int i;
- int last;
-
- last = 0;
- for (i = 0; i < 8; i++) {
- if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
- /* No PGID yet */
- continue;
- if (cdev->private->pgid[last].inf.ps.state1 ==
- SNID_STATE1_RESET) {
- /* First non-zero PGID */
- last = i;
- continue;
- }
- if (cmp_pgid(&cdev->private->pgid[i],
- &cdev->private->pgid[last]) == 0)
- /* Non-conflicting PGIDs */
- continue;
-
- /* PGID mismatch, can't pathgroup. */
- CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
- "0.%x.%04x, can't pathgroup\n",
- cdev->private->dev_id.ssid,
- cdev->private->dev_id.devno);
- cdev->private->options.pgroup = 0;
- return;
- }
- if (cdev->private->pgid[last].inf.ps.state1 ==
- SNID_STATE1_RESET)
- /* No previous pgid found */
- memcpy(&cdev->private->pgid[0],
- &channel_subsystems[0]->global_pgid,
- sizeof(struct pgid));
- else
- /* Use existing pgid */
- memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
- sizeof(struct pgid));
-}
-
-/*
- * Function called from device_pgid.c after sense path ground has completed.
- */
-void
-ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
-{
- struct subchannel *sch;
-
- sch = to_subchannel(cdev->dev.parent);
- switch (err) {
- case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
- cdev->private->options.pgroup = 0;
break;
- case 0: /* success */
- case -EACCES: /* partial success, some paths not operational */
- /* Check if all pgids are equal or 0. */
- __ccw_device_get_common_pgid(cdev);
+ case DEV_STATE_NOT_OPER:
+ CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
+ cdev->private->dev_id.devno, sch->schid.sch_no);
+ if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK)
+ ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
+ else
+ ccw_device_set_disconnected(cdev);
+ cdev->private->flags.donotify = 0;
+ break;
+ case DEV_STATE_DISCONNECTED:
+ CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel "
+ "%04x\n", cdev->private->dev_id.devno,
+ sch->schid.sch_no);
+ if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK)
+ ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
+ else
+ ccw_device_set_disconnected(cdev);
+ cdev->private->flags.donotify = 0;
break;
- case -ETIME: /* Sense path group id stopped by timeout. */
- case -EUSERS: /* device is reserved for someone else. */
- ccw_device_done(cdev, DEV_STATE_BOXED);
- return;
default:
- ccw_device_done(cdev, DEV_STATE_NOT_OPER);
- return;
+ break;
}
- /* Start Path Group verification. */
- cdev->private->state = DEV_STATE_VERIFY;
- cdev->private->flags.doverify = 0;
- ccw_device_verify_start(cdev);
+
+ if (cdev->private->flags.donotify) {
+ cdev->private->flags.donotify = 0;
+ ccw_device_oper_notify(cdev);
+ }
+ wake_up(&cdev->private->wait_q);
}
/*
* Start device recognition.
*/
-int
-ccw_device_recognition(struct ccw_device *cdev)
+void ccw_device_recognition(struct ccw_device *cdev)
{
- struct subchannel *sch;
- int ret;
-
- if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
- (cdev->private->state != DEV_STATE_BOXED))
- return -EINVAL;
- sch = to_subchannel(cdev->dev.parent);
- ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
- if (ret != 0)
- /* Couldn't enable the subchannel for i/o. Sick device. */
- return ret;
-
- /* After 60s the device recognition is considered to have failed. */
- ccw_device_set_timeout(cdev, 60*HZ);
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
/*
* We used to start here with a sense pgid to find out whether a device
*/
cdev->private->flags.recog_done = 0;
cdev->private->state = DEV_STATE_SENSE_ID;
+ if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) {
+ ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
+ return;
+ }
ccw_device_sense_id_start(cdev);
- return 0;
}
/*
- * Handle timeout in device recognition.
+ * Handle events for states that use the ccw request infrastructure.
*/
-static void
-ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
+static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e)
{
- int ret;
-
- ret = ccw_device_cancel_halt_clear(cdev);
- switch (ret) {
- case 0:
- ccw_device_recog_done(cdev, DEV_STATE_BOXED);
+ switch (e) {
+ case DEV_EVENT_NOTOPER:
+ ccw_request_notoper(cdev);
break;
- case -ENODEV:
- ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
+ case DEV_EVENT_INTERRUPT:
+ ccw_request_handler(cdev);
+ break;
+ case DEV_EVENT_TIMEOUT:
+ ccw_request_timeout(cdev);
break;
default:
- ccw_device_set_timeout(cdev, 3*HZ);
+ break;
}
}
-
void
ccw_device_verify_done(struct ccw_device *cdev, int err)
{
sch = to_subchannel(cdev->dev.parent);
/* Update schib - pom may have changed. */
- stsch(sch->schid, &sch->schib);
+ if (cio_update_schib(sch)) {
+ err = -ENODEV;
+ goto callback;
+ }
/* Update lpm with verified path mask. */
sch->lpm = sch->vpm;
/* Repeat path verification? */
if (cdev->private->flags.doverify) {
- cdev->private->flags.doverify = 0;
ccw_device_verify_start(cdev);
return;
}
+callback:
switch (err) {
- case -EOPNOTSUPP: /* path grouping not supported, just set online. */
- cdev->private->options.pgroup = 0;
case 0:
ccw_device_done(cdev, DEV_STATE_ONLINE);
/* Deliver fake irb to device driver, if needed. */
}
break;
case -ETIME:
+ case -EUSERS:
/* Reset oper notify indication after verify error. */
cdev->private->flags.donotify = 0;
ccw_device_done(cdev, DEV_STATE_BOXED);
break;
+ case -EACCES:
+ /* Reset oper notify indication after verify error. */
+ cdev->private->flags.donotify = 0;
+ ccw_device_done(cdev, DEV_STATE_DISCONNECTED);
+ break;
default:
/* Reset oper notify indication after verify error. */
cdev->private->flags.donotify = 0;
- if (cdev->online) {
- ccw_device_set_timeout(cdev, 0);
- dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
- } else
- ccw_device_done(cdev, DEV_STATE_NOT_OPER);
+ ccw_device_done(cdev, DEV_STATE_NOT_OPER);
break;
}
}
(cdev->private->state != DEV_STATE_BOXED))
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
- if (css_init_done && !get_device(&cdev->dev))
- return -ENODEV;
ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
if (ret != 0) {
/* Couldn't enable the subchannel for i/o. Sick device. */
dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
return ret;
}
- /* Do we want to do path grouping? */
- if (!cdev->private->options.pgroup) {
- /* Start initial path verification. */
- cdev->private->state = DEV_STATE_VERIFY;
- cdev->private->flags.doverify = 0;
- ccw_device_verify_start(cdev);
- return 0;
- }
- /* Do a SensePGID first. */
- cdev->private->state = DEV_STATE_SENSE_PGID;
- ccw_device_sense_pgid_start(cdev);
+ /* Start initial path verification. */
+ cdev->private->state = DEV_STATE_VERIFY;
+ ccw_device_verify_start(cdev);
return 0;
}
break;
default:
cdev->private->flags.donotify = 0;
- dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
ccw_device_done(cdev, DEV_STATE_NOT_OPER);
break;
}
{
struct subchannel *sch;
+ /* Allow ccw_device_offline while disconnected. */
+ if (cdev->private->state == DEV_STATE_DISCONNECTED ||
+ cdev->private->state == DEV_STATE_NOT_OPER) {
+ cdev->private->flags.donotify = 0;
+ ccw_device_done(cdev, DEV_STATE_NOT_OPER);
+ return 0;
+ }
+ if (cdev->private->state == DEV_STATE_BOXED) {
+ ccw_device_done(cdev, DEV_STATE_BOXED);
+ return 0;
+ }
if (ccw_device_is_orphan(cdev)) {
ccw_device_done(cdev, DEV_STATE_OFFLINE);
return 0;
}
sch = to_subchannel(cdev->dev.parent);
- if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv)
+ if (cio_update_schib(sch))
return -ENODEV;
if (scsw_actl(&sch->schib.scsw) != 0)
return -EBUSY;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EINVAL;
/* Are we doing path grouping? */
- if (!cdev->private->options.pgroup) {
+ if (!cdev->private->flags.pgroup) {
/* No, set state offline immediately. */
ccw_device_done(cdev, DEV_STATE_OFFLINE);
return 0;
}
/*
- * Handle timeout in device online/offline process.
- */
-static void
-ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
-{
- int ret;
-
- ret = ccw_device_cancel_halt_clear(cdev);
- switch (ret) {
- case 0:
- ccw_device_done(cdev, DEV_STATE_BOXED);
- break;
- case -ENODEV:
- ccw_device_done(cdev, DEV_STATE_NOT_OPER);
- break;
- default:
- ccw_device_set_timeout(cdev, 3*HZ);
- }
-}
-
-/*
- * Handle not oper event in device recognition.
+ * Handle not operational event in non-special state.
*/
-static void
-ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
+static void ccw_device_generic_notoper(struct ccw_device *cdev,
+ enum dev_event dev_event)
{
- ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
+ if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK)
+ ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
+ else
+ ccw_device_set_disconnected(cdev);
}
/*
- * Handle not operational event in non-special state.
+ * Handle path verification event in offline state.
*/
-static void ccw_device_generic_notoper(struct ccw_device *cdev,
- enum dev_event dev_event)
+static void ccw_device_offline_verify(struct ccw_device *cdev,
+ enum dev_event dev_event)
{
- struct subchannel *sch;
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
- cdev->private->state = DEV_STATE_NOT_OPER;
- sch = to_subchannel(cdev->dev.parent);
css_schedule_eval(sch->schid);
}
* Since we might not just be coming from an interrupt from the
* subchannel we have to update the schib.
*/
- stsch(sch->schid, &sch->schib);
+ if (cio_update_schib(sch)) {
+ ccw_device_verify_done(cdev, -ENODEV);
+ return;
+ }
if (scsw_actl(&sch->schib.scsw) != 0 ||
(scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
}
/* Device is idle, we can do the path verification. */
cdev->private->state = DEV_STATE_VERIFY;
- cdev->private->flags.doverify = 0;
ccw_device_verify_start(cdev);
}
/*
+ * Handle path verification event in boxed state.
+ */
+static void ccw_device_boxed_verify(struct ccw_device *cdev,
+ enum dev_event dev_event)
+{
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+
+ if (cdev->online) {
+ if (cio_enable_subchannel(sch, (u32) (addr_t) sch))
+ ccw_device_done(cdev, DEV_STATE_NOT_OPER);
+ else
+ ccw_device_online_verify(cdev, dev_event);
+ } else
+ css_schedule_eval(sch->schid);
+}
+
+/*
* Got an interrupt for a normal io (state online).
*/
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;
+ irb = (struct irb *)&S390_lowcore.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)
}
/* 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;
}
{
struct irb *irb;
- irb = (struct irb *) __LC_IRB;
+ irb = (struct irb *)&S390_lowcore.irb;
/* Check for unsolicited interrupt. */
if (scsw_stctl(&irb->scsw) ==
(SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
*/
if (scsw_fctl(&irb->scsw) &
(SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
- /* Retry Basic Sense if requested. */
- if (cdev->private->flags.intretry) {
- cdev->private->flags.intretry = 0;
- ccw_device_do_sense(cdev, irb);
- return;
- }
cdev->private->flags.dosense = 0;
memset(&cdev->private->irb, 0, sizeof(struct irb));
ccw_device_accumulate_irb(cdev, irb);
}
call_handler:
cdev->private->state = DEV_STATE_ONLINE;
+ /* In case sensing interfered with setting the device online */
+ wake_up(&cdev->private->wait_q);
/* Call the handler. */
if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
/* Start delayed path verification. */
}
static void
-ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
-{
- struct irb *irb;
-
- irb = (struct irb *) __LC_IRB;
- /* Accumulate status. We don't do basic sense. */
- ccw_device_accumulate_irb(cdev, irb);
- /* Remember to clear irb to avoid residuals. */
- memset(&cdev->private->irb, 0, sizeof(struct irb));
- /* Try to start delayed device verification. */
- ccw_device_online_verify(cdev, 0);
- /* Note: Don't call handler for cio initiated clear! */
-}
-
-static void
ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
{
struct subchannel *sch;
}
static void
-ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
-{
- struct irb *irb;
-
- switch (dev_event) {
- case DEV_EVENT_INTERRUPT:
- irb = (struct irb *) __LC_IRB;
- /* Check for unsolicited interrupt. */
- if ((scsw_stctl(&irb->scsw) ==
- (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
- (!scsw_cc(&irb->scsw)))
- /* FIXME: we should restart stlck here, but this
- * is extremely unlikely ... */
- goto out_wakeup;
-
- ccw_device_accumulate_irb(cdev, irb);
- /* We don't care about basic sense etc. */
- break;
- default: /* timeout */
- break;
- }
-out_wakeup:
- wake_up(&cdev->private->wait_q);
-}
-
-static void
ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
{
struct subchannel *sch;
if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
/* Couldn't enable the subchannel for i/o. Sick device. */
return;
-
- /* After 60s the device recognition is considered to have failed. */
- ccw_device_set_timeout(cdev, 60*HZ);
-
cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
ccw_device_sense_id_start(cdev);
}
sch = to_subchannel(cdev->dev.parent);
/* Update some values. */
- if (stsch(sch->schid, &sch->schib))
- return;
- if (!sch->schib.pmcw.dnv)
+ if (cio_update_schib(sch))
return;
/*
* The pim, pam, pom values may not be accurate, but they are the best
* we have before performing device selection :/
*/
sch->lpm = sch->schib.pmcw.pam & sch->opm;
- /* Re-set some bits in the pmcw that were lost. */
- sch->schib.pmcw.csense = 1;
- sch->schib.pmcw.ena = 0;
- if ((sch->lpm & (sch->lpm - 1)) != 0)
- sch->schib.pmcw.mp = 1;
+ /*
+ * Use the initial configuration since we can't be shure that the old
+ * paths are valid.
+ */
+ io_subchannel_init_config(sch);
+ if (cio_commit_config(sch))
+ return;
+
/* We should also udate ssd info, but this has to wait. */
/* Check if this is another device which appeared on the same sch. */
- if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_move_to_orphanage);
- queue_work(slow_path_wq, &cdev->private->kick_work);
- } else
+ if (sch->schib.pmcw.dev != cdev->private->dev_id.devno)
+ css_schedule_eval(sch->schid);
+ else
ccw_device_start_id(cdev, 0);
}
-static void
-ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
+static void ccw_device_disabled_irq(struct ccw_device *cdev,
+ enum dev_event dev_event)
{
struct subchannel *sch;
sch = to_subchannel(cdev->dev.parent);
/*
- * An interrupt in state offline means a previous disable was not
- * successful. Try again.
+ * An interrupt in a disabled state means a previous disable was not
+ * successful - should not happen, but we try to disable again.
*/
cio_disable_subchannel(sch);
}
ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
{
ccw_device_set_timeout(cdev, 0);
- if (dev_event == DEV_EVENT_NOTOPER)
- cdev->private->state = DEV_STATE_NOT_OPER;
- else
- cdev->private->state = DEV_STATE_OFFLINE;
+ cdev->private->state = DEV_STATE_NOT_OPER;
wake_up(&cdev->private->wait_q);
}
int ret;
ret = ccw_device_cancel_halt_clear(cdev);
- switch (ret) {
- case 0:
- cdev->private->state = DEV_STATE_OFFLINE;
- wake_up(&cdev->private->wait_q);
- break;
- case -ENODEV:
+ if (ret == -EBUSY) {
+ ccw_device_set_timeout(cdev, HZ/10);
+ } else {
cdev->private->state = DEV_STATE_NOT_OPER;
wake_up(&cdev->private->wait_q);
- break;
- default:
- ccw_device_set_timeout(cdev, HZ/10);
}
}
}
/*
- * Bug operation action.
- */
-static void
-ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
-{
- CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
- "0.%x.%04x\n", cdev->private->state, dev_event,
- cdev->private->dev_id.ssid,
- cdev->private->dev_id.devno);
- BUG();
-}
-
-/*
* device statemachine
*/
fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
[DEV_STATE_NOT_OPER] = {
[DEV_EVENT_NOTOPER] = ccw_device_nop,
- [DEV_EVENT_INTERRUPT] = ccw_device_bug,
+ [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
[DEV_EVENT_TIMEOUT] = ccw_device_nop,
[DEV_EVENT_VERIFY] = ccw_device_nop,
},
[DEV_STATE_SENSE_PGID] = {
- [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq,
- [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
+ [DEV_EVENT_NOTOPER] = ccw_device_request_event,
+ [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
+ [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
[DEV_EVENT_VERIFY] = ccw_device_nop,
},
[DEV_STATE_SENSE_ID] = {
- [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq,
- [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout,
+ [DEV_EVENT_NOTOPER] = ccw_device_request_event,
+ [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
+ [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
[DEV_EVENT_VERIFY] = ccw_device_nop,
},
[DEV_STATE_OFFLINE] = {
[DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq,
+ [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
[DEV_EVENT_TIMEOUT] = ccw_device_nop,
- [DEV_EVENT_VERIFY] = ccw_device_nop,
+ [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
},
[DEV_STATE_VERIFY] = {
- [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq,
- [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
+ [DEV_EVENT_NOTOPER] = ccw_device_request_event,
+ [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
+ [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
[DEV_EVENT_VERIFY] = ccw_device_delay_verify,
},
[DEV_STATE_ONLINE] = {
[DEV_EVENT_VERIFY] = ccw_device_online_verify,
},
[DEV_STATE_DISBAND_PGID] = {
- [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq,
- [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
+ [DEV_EVENT_NOTOPER] = ccw_device_request_event,
+ [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
+ [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
[DEV_EVENT_VERIFY] = ccw_device_nop,
},
[DEV_STATE_BOXED] = {
[DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_stlck_done,
- [DEV_EVENT_TIMEOUT] = ccw_device_stlck_done,
- [DEV_EVENT_VERIFY] = ccw_device_nop,
- },
- /* states to wait for i/o completion before doing something */
- [DEV_STATE_CLEAR_VERIFY] = {
- [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify,
+ [DEV_EVENT_INTERRUPT] = ccw_device_nop,
[DEV_EVENT_TIMEOUT] = ccw_device_nop,
- [DEV_EVENT_VERIFY] = ccw_device_nop,
+ [DEV_EVENT_VERIFY] = ccw_device_boxed_verify,
},
+ /* states to wait for i/o completion before doing something */
[DEV_STATE_TIMEOUT_KILL] = {
[DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
[DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
[DEV_STATE_DISCONNECTED] = {
[DEV_EVENT_NOTOPER] = ccw_device_nop,
[DEV_EVENT_INTERRUPT] = ccw_device_start_id,
- [DEV_EVENT_TIMEOUT] = ccw_device_bug,
+ [DEV_EVENT_TIMEOUT] = ccw_device_nop,
[DEV_EVENT_VERIFY] = ccw_device_start_id,
},
[DEV_STATE_DISCONNECTED_SENSE_ID] = {
- [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper,
- [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq,
- [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout,
+ [DEV_EVENT_NOTOPER] = ccw_device_request_event,
+ [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
+ [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
[DEV_EVENT_VERIFY] = ccw_device_nop,
},
[DEV_STATE_CMFCHANGE] = {
[DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
[DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
},
+ [DEV_STATE_STEAL_LOCK] = {
+ [DEV_EVENT_NOTOPER] = ccw_device_request_event,
+ [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
+ [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
+ [DEV_EVENT_VERIFY] = ccw_device_nop,
+ },
};
EXPORT_SYMBOL_GPL(ccw_device_set_timeout);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff