| /* |
| * drivers/s390/cio/device_fsm.c |
| * finite state machine for device handling |
| * |
| * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, |
| * IBM Corporation |
| * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) |
| * Martin Schwidefsky (schwidefsky@de.ibm.com) |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/jiffies.h> |
| #include <linux/string.h> |
| |
| #include <asm/ccwdev.h> |
| #include <asm/cio.h> |
| |
| #include "cio.h" |
| #include "cio_debug.h" |
| #include "css.h" |
| #include "device.h" |
| #include "chsc.h" |
| #include "ioasm.h" |
| |
| int |
| device_is_online(struct subchannel *sch) |
| { |
| struct ccw_device *cdev; |
| |
| if (!sch->dev.driver_data) |
| return 0; |
| cdev = sch->dev.driver_data; |
| return (cdev->private->state == DEV_STATE_ONLINE); |
| } |
| |
| int |
| device_is_disconnected(struct subchannel *sch) |
| { |
| struct ccw_device *cdev; |
| |
| if (!sch->dev.driver_data) |
| return 0; |
| cdev = sch->dev.driver_data; |
| return (cdev->private->state == DEV_STATE_DISCONNECTED || |
| cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID); |
| } |
| |
| void |
| device_set_disconnected(struct subchannel *sch) |
| { |
| struct ccw_device *cdev; |
| |
| if (!sch->dev.driver_data) |
| return; |
| cdev = sch->dev.driver_data; |
| ccw_device_set_timeout(cdev, 0); |
| cdev->private->flags.fake_irb = 0; |
| cdev->private->state = DEV_STATE_DISCONNECTED; |
| } |
| |
| void |
| device_set_waiting(struct subchannel *sch) |
| { |
| struct ccw_device *cdev; |
| |
| if (!sch->dev.driver_data) |
| return; |
| cdev = sch->dev.driver_data; |
| ccw_device_set_timeout(cdev, 10*HZ); |
| cdev->private->state = DEV_STATE_WAIT4IO; |
| } |
| |
| /* |
| * Timeout function. It just triggers a DEV_EVENT_TIMEOUT. |
| */ |
| static void |
| ccw_device_timeout(unsigned long data) |
| { |
| struct ccw_device *cdev; |
| |
| cdev = (struct ccw_device *) data; |
| spin_lock_irq(cdev->ccwlock); |
| dev_fsm_event(cdev, DEV_EVENT_TIMEOUT); |
| spin_unlock_irq(cdev->ccwlock); |
| } |
| |
| /* |
| * Set timeout |
| */ |
| void |
| ccw_device_set_timeout(struct ccw_device *cdev, int expires) |
| { |
| if (expires == 0) { |
| del_timer(&cdev->private->timer); |
| return; |
| } |
| if (timer_pending(&cdev->private->timer)) { |
| if (mod_timer(&cdev->private->timer, jiffies + expires)) |
| return; |
| } |
| cdev->private->timer.function = ccw_device_timeout; |
| cdev->private->timer.data = (unsigned long) cdev; |
| cdev->private->timer.expires = jiffies + expires; |
| add_timer(&cdev->private->timer); |
| } |
| |
| /* Kill any pending timers after machine check. */ |
| void |
| device_kill_pending_timer(struct subchannel *sch) |
| { |
| struct ccw_device *cdev; |
| |
| if (!sch->dev.driver_data) |
| return; |
| cdev = sch->dev.driver_data; |
| ccw_device_set_timeout(cdev, 0); |
| } |
| |
| /* |
| * Cancel running i/o. This is called repeatedly since halt/clear are |
| * asynchronous operations. We do one try with cio_cancel, two tries |
| * with cio_halt, 255 tries with cio_clear. If everythings fails panic. |
| * Returns 0 if device now idle, -ENODEV for device not operational and |
| * -EBUSY if an interrupt is expected (either from halt/clear or from a |
| * status pending). |
| */ |
| int |
| ccw_device_cancel_halt_clear(struct ccw_device *cdev) |
| { |
| struct subchannel *sch; |
| int ret; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| ret = stsch(sch->schid, &sch->schib); |
| if (ret || !sch->schib.pmcw.dnv) |
| return -ENODEV; |
| if (!sch->schib.pmcw.ena || sch->schib.scsw.actl == 0) |
| /* Not operational or no activity -> done. */ |
| return 0; |
| /* Stage 1: cancel io. */ |
| if (!(sch->schib.scsw.actl & SCSW_ACTL_HALT_PEND) && |
| !(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) { |
| ret = cio_cancel(sch); |
| if (ret != -EINVAL) |
| return ret; |
| /* cancel io unsuccessful. From now on it is asynchronous. */ |
| cdev->private->iretry = 3; /* 3 halt retries. */ |
| } |
| if (!(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) { |
| /* Stage 2: halt io. */ |
| if (cdev->private->iretry) { |
| cdev->private->iretry--; |
| ret = cio_halt(sch); |
| if (ret != -EBUSY) |
| return (ret == 0) ? -EBUSY : ret; |
| } |
| /* halt io unsuccessful. */ |
| cdev->private->iretry = 255; /* 255 clear retries. */ |
| } |
| /* Stage 3: clear io. */ |
| if (cdev->private->iretry) { |
| cdev->private->iretry--; |
| ret = cio_clear (sch); |
| return (ret == 0) ? -EBUSY : ret; |
| } |
| panic("Can't stop i/o on subchannel.\n"); |
| } |
| |
| static int |
| ccw_device_handle_oper(struct ccw_device *cdev) |
| { |
| struct subchannel *sch; |
| |
| 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. Also check here for non-matching devno. |
| */ |
| 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 || |
| cdev->private->devno != sch->schib.pmcw.dev) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_do_unreg_rereg, (void *)cdev); |
| queue_work(ccw_device_work, &cdev->private->kick_work); |
| return 0; |
| } |
| cdev->private->flags.donotify = 1; |
| return 1; |
| } |
| |
| /* |
| * The machine won't give us any notification by machine check if a chpid has |
| * been varied online on the SE so we have to find out by magic (i. e. driving |
| * the channel subsystem to device selection and updating our path masks). |
| */ |
| static inline void |
| __recover_lost_chpids(struct subchannel *sch, int old_lpm) |
| { |
| int mask, i; |
| |
| for (i = 0; i<8; i++) { |
| mask = 0x80 >> i; |
| if (!(sch->lpm & mask)) |
| continue; |
| if (old_lpm & mask) |
| continue; |
| chpid_is_actually_online(sch->schib.pmcw.chpid[i]); |
| } |
| } |
| |
| /* |
| * Stop device recognition. |
| */ |
| static void |
| ccw_device_recog_done(struct ccw_device *cdev, int state) |
| { |
| struct subchannel *sch; |
| int notify, old_lpm, same_dev; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| |
| ccw_device_set_timeout(cdev, 0); |
| cio_disable_subchannel(sch); |
| /* |
| * 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) |
| state = DEV_STATE_NOT_OPER; |
| 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. */ |
| } |
| notify = 0; |
| same_dev = 0; /* Keep the compiler quiet... */ |
| switch (state) { |
| case DEV_STATE_NOT_OPER: |
| CIO_DEBUG(KERN_WARNING, 2, |
| "SenseID : unknown device %04x on subchannel " |
| "0.%x.%04x\n", cdev->private->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; |
| } |
| /* 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; |
| } |
| /* Issue device info message. */ |
| CIO_DEBUG(KERN_INFO, 2, "SenseID : device 0.%x.%04x reports: " |
| "CU Type/Mod = %04X/%02X, Dev Type/Mod = " |
| "%04X/%02X\n", |
| cdev->private->ssid, cdev->private->devno, |
| cdev->id.cu_type, cdev->id.cu_model, |
| cdev->id.dev_type, cdev->id.dev_model); |
| break; |
| case DEV_STATE_BOXED: |
| CIO_DEBUG(KERN_WARNING, 2, |
| "SenseID : boxed device %04x on subchannel " |
| "0.%x.%04x\n", cdev->private->devno, |
| sch->schid.ssid, sch->schid.sch_no); |
| break; |
| } |
| cdev->private->state = state; |
| io_subchannel_recog_done(cdev); |
| if (state != DEV_STATE_NOT_OPER) |
| wake_up(&cdev->private->wait_q); |
| } |
| |
| /* |
| * Function called from device_id.c after sense id has completed. |
| */ |
| void |
| ccw_device_sense_id_done(struct ccw_device *cdev, int err) |
| { |
| switch (err) { |
| case 0: |
| ccw_device_recog_done(cdev, DEV_STATE_OFFLINE); |
| break; |
| case -ETIME: /* Sense id stopped by timeout. */ |
| ccw_device_recog_done(cdev, DEV_STATE_BOXED); |
| break; |
| default: |
| ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); |
| break; |
| } |
| } |
| |
| static void |
| ccw_device_oper_notify(void *data) |
| { |
| struct ccw_device *cdev; |
| struct subchannel *sch; |
| int ret; |
| |
| cdev = (struct ccw_device *)data; |
| sch = to_subchannel(cdev->dev.parent); |
| ret = (sch->driver && sch->driver->notify) ? |
| sch->driver->notify(&sch->dev, CIO_OPER) : 0; |
| if (!ret) |
| /* Driver doesn't want device back. */ |
| ccw_device_do_unreg_rereg((void *)cdev); |
| else { |
| /* Reenable channel measurements, if needed. */ |
| cmf_reenable(cdev); |
| wake_up(&cdev->private->wait_q); |
| } |
| } |
| |
| /* |
| * Finished with online/offline processing. |
| */ |
| static void |
| ccw_device_done(struct ccw_device *cdev, int state) |
| { |
| struct subchannel *sch; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| |
| ccw_device_set_timeout(cdev, 0); |
| |
| if (state != DEV_STATE_ONLINE) |
| cio_disable_subchannel(sch); |
| |
| /* Reset device status. */ |
| memset(&cdev->private->irb, 0, sizeof(struct irb)); |
| |
| cdev->private->state = state; |
| |
| |
| if (state == DEV_STATE_BOXED) |
| CIO_DEBUG(KERN_WARNING, 2, |
| "Boxed device %04x on subchannel %04x\n", |
| cdev->private->devno, sch->schid.sch_no); |
| |
| if (cdev->private->flags.donotify) { |
| cdev->private->flags.donotify = 0; |
| PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify, |
| (void *)cdev); |
| 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 inline 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->ssid, cdev->private->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], &css[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); |
| 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; |
| } |
| /* Start Path Group verification. */ |
| cdev->private->state = DEV_STATE_VERIFY; |
| cdev->private->flags.doverify = 0; |
| ccw_device_verify_start(cdev); |
| } |
| |
| /* |
| * Start device recognition. |
| */ |
| int |
| 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, sch->schib.pmcw.isc); |
| 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); |
| |
| /* |
| * We used to start here with a sense pgid to find out whether a device |
| * is locked by someone else. Unfortunately, the sense pgid command |
| * code has other meanings on devices predating the path grouping |
| * algorithm, so we start with sense id and box the device after an |
| * timeout (or if sense pgid during path verification detects the device |
| * is locked, as may happen on newer devices). |
| */ |
| cdev->private->flags.recog_done = 0; |
| cdev->private->state = DEV_STATE_SENSE_ID; |
| ccw_device_sense_id_start(cdev); |
| return 0; |
| } |
| |
| /* |
| * Handle timeout in device recognition. |
| */ |
| static void |
| ccw_device_recog_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_recog_done(cdev, DEV_STATE_BOXED); |
| break; |
| case -ENODEV: |
| ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); |
| break; |
| default: |
| ccw_device_set_timeout(cdev, 3*HZ); |
| } |
| } |
| |
| |
| static void |
| ccw_device_nopath_notify(void *data) |
| { |
| struct ccw_device *cdev; |
| struct subchannel *sch; |
| int ret; |
| |
| cdev = (struct ccw_device *)data; |
| sch = to_subchannel(cdev->dev.parent); |
| /* Extra sanity. */ |
| if (sch->lpm) |
| return; |
| ret = (sch->driver && sch->driver->notify) ? |
| sch->driver->notify(&sch->dev, CIO_NO_PATH) : 0; |
| if (!ret) { |
| if (get_device(&sch->dev)) { |
| /* Driver doesn't want to keep device. */ |
| cio_disable_subchannel(sch); |
| if (get_device(&cdev->dev)) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_call_sch_unregister, |
| (void *)cdev); |
| queue_work(ccw_device_work, |
| &cdev->private->kick_work); |
| } else |
| put_device(&sch->dev); |
| } |
| } else { |
| cio_disable_subchannel(sch); |
| ccw_device_set_timeout(cdev, 0); |
| cdev->private->flags.fake_irb = 0; |
| cdev->private->state = DEV_STATE_DISCONNECTED; |
| wake_up(&cdev->private->wait_q); |
| } |
| } |
| |
| void |
| ccw_device_verify_done(struct ccw_device *cdev, int err) |
| { |
| struct subchannel *sch; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| /* Update schib - pom may have changed. */ |
| stsch(sch->schid, &sch->schib); |
| /* 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; |
| } |
| 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. */ |
| if (cdev->private->flags.fake_irb) { |
| memset(&cdev->private->irb, 0, sizeof(struct irb)); |
| cdev->private->irb.scsw.cc = 1; |
| cdev->private->irb.scsw.fctl = SCSW_FCTL_START_FUNC; |
| cdev->private->irb.scsw.actl = SCSW_ACTL_START_PEND; |
| cdev->private->irb.scsw.stctl = SCSW_STCTL_STATUS_PEND; |
| cdev->private->flags.fake_irb = 0; |
| if (cdev->handler) |
| cdev->handler(cdev, cdev->private->intparm, |
| &cdev->private->irb); |
| memset(&cdev->private->irb, 0, sizeof(struct irb)); |
| } |
| break; |
| case -ETIME: |
| ccw_device_done(cdev, DEV_STATE_BOXED); |
| break; |
| default: |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_nopath_notify, (void *)cdev); |
| queue_work(ccw_device_notify_work, &cdev->private->kick_work); |
| ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
| break; |
| } |
| } |
| |
| /* |
| * Get device online. |
| */ |
| int |
| ccw_device_online(struct ccw_device *cdev) |
| { |
| struct subchannel *sch; |
| int ret; |
| |
| if ((cdev->private->state != DEV_STATE_OFFLINE) && |
| (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, sch->schib.pmcw.isc); |
| if (ret != 0) { |
| /* Couldn't enable the subchannel for i/o. Sick device. */ |
| if (ret == -ENODEV) |
| 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); |
| return 0; |
| } |
| |
| void |
| ccw_device_disband_done(struct ccw_device *cdev, int err) |
| { |
| switch (err) { |
| case 0: |
| ccw_device_done(cdev, DEV_STATE_OFFLINE); |
| break; |
| case -ETIME: |
| ccw_device_done(cdev, DEV_STATE_BOXED); |
| break; |
| default: |
| ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
| break; |
| } |
| } |
| |
| /* |
| * Shutdown device. |
| */ |
| int |
| ccw_device_offline(struct ccw_device *cdev) |
| { |
| struct subchannel *sch; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv) |
| return -ENODEV; |
| if (cdev->private->state != DEV_STATE_ONLINE) { |
| if (sch->schib.scsw.actl != 0) |
| return -EBUSY; |
| return -EINVAL; |
| } |
| if (sch->schib.scsw.actl != 0) |
| return -EBUSY; |
| /* Are we doing path grouping? */ |
| if (!cdev->private->options.pgroup) { |
| /* No, set state offline immediately. */ |
| ccw_device_done(cdev, DEV_STATE_OFFLINE); |
| return 0; |
| } |
| /* Start Set Path Group commands. */ |
| cdev->private->state = DEV_STATE_DISBAND_PGID; |
| ccw_device_disband_start(cdev); |
| 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. |
| */ |
| static void |
| ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); |
| } |
| |
| /* |
| * Handle not operational event while offline. |
| */ |
| static void |
| ccw_device_offline_notoper(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| struct subchannel *sch; |
| |
| cdev->private->state = DEV_STATE_NOT_OPER; |
| sch = to_subchannel(cdev->dev.parent); |
| if (get_device(&cdev->dev)) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_call_sch_unregister, (void *)cdev); |
| queue_work(ccw_device_work, &cdev->private->kick_work); |
| } |
| wake_up(&cdev->private->wait_q); |
| } |
| |
| /* |
| * Handle not operational event while online. |
| */ |
| static void |
| ccw_device_online_notoper(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| struct subchannel *sch; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| if (sch->driver->notify && |
| sch->driver->notify(&sch->dev, sch->lpm ? CIO_GONE : CIO_NO_PATH)) { |
| ccw_device_set_timeout(cdev, 0); |
| cdev->private->flags.fake_irb = 0; |
| cdev->private->state = DEV_STATE_DISCONNECTED; |
| wake_up(&cdev->private->wait_q); |
| return; |
| } |
| cdev->private->state = DEV_STATE_NOT_OPER; |
| cio_disable_subchannel(sch); |
| if (sch->schib.scsw.actl != 0) { |
| // FIXME: not-oper indication to device driver ? |
| ccw_device_call_handler(cdev); |
| } |
| if (get_device(&cdev->dev)) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_call_sch_unregister, (void *)cdev); |
| queue_work(ccw_device_work, &cdev->private->kick_work); |
| } |
| wake_up(&cdev->private->wait_q); |
| } |
| |
| /* |
| * Handle path verification event. |
| */ |
| static void |
| ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| struct subchannel *sch; |
| |
| if (cdev->private->state == DEV_STATE_W4SENSE) { |
| cdev->private->flags.doverify = 1; |
| return; |
| } |
| sch = to_subchannel(cdev->dev.parent); |
| /* |
| * 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 (sch->schib.scsw.actl != 0 || |
| (sch->schib.scsw.stctl & SCSW_STCTL_STATUS_PEND) || |
| (cdev->private->irb.scsw.stctl & SCSW_STCTL_STATUS_PEND)) { |
| /* |
| * No final status yet or final status not yet delivered |
| * to the device driver. Can't do path verfication now, |
| * delay until final status was delivered. |
| */ |
| cdev->private->flags.doverify = 1; |
| return; |
| } |
| /* 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); |
| } |
| |
| /* |
| * 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; |
| |
| irb = (struct irb *) __LC_IRB; |
| /* Check for unsolicited interrupt. */ |
| if ((irb->scsw.stctl == |
| (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) |
| && (!irb->scsw.cc)) { |
| if ((irb->scsw.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) |
| goto call_handler_unsol; |
| memcpy(&cdev->private->irb, irb, sizeof(struct irb)); |
| cdev->private->state = DEV_STATE_W4SENSE; |
| cdev->private->intparm = 0; |
| return; |
| } |
| call_handler_unsol: |
| if (cdev->handler) |
| cdev->handler (cdev, 0, irb); |
| return; |
| } |
| /* Accumulate status and find out if a basic sense is needed. */ |
| ccw_device_accumulate_irb(cdev, irb); |
| if (cdev->private->flags.dosense) { |
| if (ccw_device_do_sense(cdev, irb) == 0) { |
| cdev->private->state = DEV_STATE_W4SENSE; |
| } |
| return; |
| } |
| /* Call the handler. */ |
| if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) |
| /* Start delayed path verification. */ |
| ccw_device_online_verify(cdev, 0); |
| } |
| |
| /* |
| * Got an timeout in online state. |
| */ |
| static void |
| ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| int ret; |
| |
| ccw_device_set_timeout(cdev, 0); |
| ret = ccw_device_cancel_halt_clear(cdev); |
| if (ret == -EBUSY) { |
| ccw_device_set_timeout(cdev, 3*HZ); |
| cdev->private->state = DEV_STATE_TIMEOUT_KILL; |
| return; |
| } |
| if (ret == -ENODEV) { |
| struct subchannel *sch; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| if (!sch->lpm) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_nopath_notify, (void *)cdev); |
| queue_work(ccw_device_notify_work, |
| &cdev->private->kick_work); |
| } else |
| dev_fsm_event(cdev, DEV_EVENT_NOTOPER); |
| } else if (cdev->handler) |
| cdev->handler(cdev, cdev->private->intparm, |
| ERR_PTR(-ETIMEDOUT)); |
| } |
| |
| /* |
| * Got an interrupt for a basic sense. |
| */ |
| void |
| ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| struct irb *irb; |
| |
| irb = (struct irb *) __LC_IRB; |
| /* Check for unsolicited interrupt. */ |
| if (irb->scsw.stctl == |
| (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) { |
| if (irb->scsw.cc == 1) |
| /* Basic sense hasn't started. Try again. */ |
| ccw_device_do_sense(cdev, irb); |
| else { |
| printk(KERN_INFO "Huh? %s(%s): unsolicited " |
| "interrupt...\n", |
| __FUNCTION__, cdev->dev.bus_id); |
| if (cdev->handler) |
| cdev->handler (cdev, 0, irb); |
| } |
| return; |
| } |
| /* |
| * Check if a halt or clear has been issued in the meanwhile. If yes, |
| * only deliver the halt/clear interrupt to the device driver as if it |
| * had killed the original request. |
| */ |
| if (irb->scsw.fctl & (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) { |
| cdev->private->flags.dosense = 0; |
| memset(&cdev->private->irb, 0, sizeof(struct irb)); |
| ccw_device_accumulate_irb(cdev, irb); |
| goto call_handler; |
| } |
| /* Add basic sense info to irb. */ |
| ccw_device_accumulate_basic_sense(cdev, irb); |
| if (cdev->private->flags.dosense) { |
| /* Another basic sense is needed. */ |
| ccw_device_do_sense(cdev, irb); |
| return; |
| } |
| call_handler: |
| cdev->private->state = DEV_STATE_ONLINE; |
| /* Call the handler. */ |
| if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) |
| /* Start delayed path verification. */ |
| ccw_device_online_verify(cdev, 0); |
| } |
| |
| 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; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| ccw_device_set_timeout(cdev, 0); |
| /* OK, i/o is dead now. Call interrupt handler. */ |
| cdev->private->state = DEV_STATE_ONLINE; |
| if (cdev->handler) |
| cdev->handler(cdev, cdev->private->intparm, |
| ERR_PTR(-ETIMEDOUT)); |
| if (!sch->lpm) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_nopath_notify, (void *)cdev); |
| queue_work(ccw_device_notify_work, &cdev->private->kick_work); |
| } else if (cdev->private->flags.doverify) |
| /* Start delayed path verification. */ |
| ccw_device_online_verify(cdev, 0); |
| } |
| |
| static void |
| ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| int ret; |
| |
| ret = ccw_device_cancel_halt_clear(cdev); |
| if (ret == -EBUSY) { |
| ccw_device_set_timeout(cdev, 3*HZ); |
| return; |
| } |
| if (ret == -ENODEV) { |
| struct subchannel *sch; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| if (!sch->lpm) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_nopath_notify, (void *)cdev); |
| queue_work(ccw_device_notify_work, |
| &cdev->private->kick_work); |
| } else |
| dev_fsm_event(cdev, DEV_EVENT_NOTOPER); |
| return; |
| } |
| //FIXME: Can we get here? |
| cdev->private->state = DEV_STATE_ONLINE; |
| if (cdev->handler) |
| cdev->handler(cdev, cdev->private->intparm, |
| ERR_PTR(-ETIMEDOUT)); |
| } |
| |
| static void |
| ccw_device_wait4io_irq(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| struct irb *irb; |
| struct subchannel *sch; |
| |
| irb = (struct irb *) __LC_IRB; |
| /* |
| * Accumulate status and find out if a basic sense is needed. |
| * This is fine since we have already adapted the lpm. |
| */ |
| ccw_device_accumulate_irb(cdev, irb); |
| if (cdev->private->flags.dosense) { |
| if (ccw_device_do_sense(cdev, irb) == 0) { |
| cdev->private->state = DEV_STATE_W4SENSE; |
| } |
| return; |
| } |
| |
| /* Iff device is idle, reset timeout. */ |
| sch = to_subchannel(cdev->dev.parent); |
| if (!stsch(sch->schid, &sch->schib)) |
| if (sch->schib.scsw.actl == 0) |
| ccw_device_set_timeout(cdev, 0); |
| /* Call the handler. */ |
| ccw_device_call_handler(cdev); |
| if (!sch->lpm) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_nopath_notify, (void *)cdev); |
| queue_work(ccw_device_notify_work, &cdev->private->kick_work); |
| } else if (cdev->private->flags.doverify) |
| ccw_device_online_verify(cdev, 0); |
| } |
| |
| static void |
| ccw_device_wait4io_timeout(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| int ret; |
| struct subchannel *sch; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| ccw_device_set_timeout(cdev, 0); |
| ret = ccw_device_cancel_halt_clear(cdev); |
| if (ret == -EBUSY) { |
| ccw_device_set_timeout(cdev, 3*HZ); |
| cdev->private->state = DEV_STATE_TIMEOUT_KILL; |
| return; |
| } |
| if (ret == -ENODEV) { |
| if (!sch->lpm) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_nopath_notify, (void *)cdev); |
| queue_work(ccw_device_notify_work, |
| &cdev->private->kick_work); |
| } else |
| dev_fsm_event(cdev, DEV_EVENT_NOTOPER); |
| return; |
| } |
| if (cdev->handler) |
| cdev->handler(cdev, cdev->private->intparm, |
| ERR_PTR(-ETIMEDOUT)); |
| if (!sch->lpm) { |
| PREPARE_WORK(&cdev->private->kick_work, |
| ccw_device_nopath_notify, (void *)cdev); |
| queue_work(ccw_device_notify_work, &cdev->private->kick_work); |
| } else if (cdev->private->flags.doverify) |
| /* Start delayed path verification. */ |
| ccw_device_online_verify(cdev, 0); |
| } |
| |
| static void |
| ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| /* Start verification after current task finished. */ |
| cdev->private->flags.doverify = 1; |
| } |
| |
| 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 ((irb->scsw.stctl == |
| (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) && |
| (!irb->scsw.cc)) |
| /* 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; |
| |
| sch = to_subchannel(cdev->dev.parent); |
| if (cio_enable_subchannel(sch, sch->schib.pmcw.isc) != 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); |
| } |
| |
| void |
| device_trigger_reprobe(struct subchannel *sch) |
| { |
| struct ccw_device *cdev; |
| |
| if (!sch->dev.driver_data) |
| return; |
| cdev = sch->dev.driver_data; |
| if (cdev->private->state != DEV_STATE_DISCONNECTED) |
| return; |
| |
| /* Update some values. */ |
| if (stsch(sch->schid, &sch->schib)) |
| 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.isc = 3; |
| sch->schib.pmcw.csense = 1; |
| sch->schib.pmcw.ena = 0; |
| if ((sch->lpm & (sch->lpm - 1)) != 0) |
| sch->schib.pmcw.mp = 1; |
| sch->schib.pmcw.intparm = (__u32)(unsigned long)sch; |
| /* We should also udate ssd info, but this has to wait. */ |
| ccw_device_start_id(cdev, 0); |
| } |
| |
| static void |
| ccw_device_offline_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. |
| */ |
| cio_disable_subchannel(sch); |
| } |
| |
| static void |
| ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| retry_set_schib(cdev); |
| cdev->private->state = DEV_STATE_ONLINE; |
| dev_fsm_event(cdev, dev_event); |
| } |
| |
| static void ccw_device_update_cmfblock(struct ccw_device *cdev, |
| enum dev_event dev_event) |
| { |
| cmf_retry_copy_block(cdev); |
| cdev->private->state = DEV_STATE_ONLINE; |
| dev_fsm_event(cdev, dev_event); |
| } |
| |
| static void |
| 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; |
| wake_up(&cdev->private->wait_q); |
| } |
| |
| static void |
| ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| 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: |
| cdev->private->state = DEV_STATE_NOT_OPER; |
| wake_up(&cdev->private->wait_q); |
| break; |
| default: |
| ccw_device_set_timeout(cdev, HZ/10); |
| } |
| } |
| |
| /* |
| * No operation action. This is used e.g. to ignore a timeout event in |
| * state offline. |
| */ |
| static void |
| ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| } |
| |
| /* |
| * Bug operation action. |
| */ |
| static void |
| ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event) |
| { |
| printk(KERN_EMERG "dev_jumptable[%i][%i] == NULL\n", |
| cdev->private->state, dev_event); |
| 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_TIMEOUT] = ccw_device_nop, |
| [DEV_EVENT_VERIFY] = ccw_device_nop, |
| }, |
| [DEV_STATE_SENSE_PGID] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq, |
| [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, |
| [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_VERIFY] = ccw_device_nop, |
| }, |
| [DEV_STATE_OFFLINE] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_offline_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq, |
| [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| [DEV_EVENT_VERIFY] = ccw_device_nop, |
| }, |
| [DEV_STATE_VERIFY] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq, |
| [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, |
| [DEV_EVENT_VERIFY] = ccw_device_delay_verify, |
| }, |
| [DEV_STATE_ONLINE] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_irq, |
| [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout, |
| [DEV_EVENT_VERIFY] = ccw_device_online_verify, |
| }, |
| [DEV_STATE_W4SENSE] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_w4sense, |
| [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| [DEV_EVENT_VERIFY] = ccw_device_online_verify, |
| }, |
| [DEV_STATE_DISBAND_PGID] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq, |
| [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, |
| [DEV_EVENT_VERIFY] = ccw_device_nop, |
| }, |
| [DEV_STATE_BOXED] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_offline_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_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify, |
| [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
| [DEV_EVENT_VERIFY] = ccw_device_nop, |
| }, |
| [DEV_STATE_TIMEOUT_KILL] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, |
| [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout, |
| [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME |
| }, |
| [DEV_STATE_WAIT4IO] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, |
| [DEV_EVENT_INTERRUPT] = ccw_device_wait4io_irq, |
| [DEV_EVENT_TIMEOUT] = ccw_device_wait4io_timeout, |
| [DEV_EVENT_VERIFY] = ccw_device_delay_verify, |
| }, |
| [DEV_STATE_QUIESCE] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done, |
| [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done, |
| [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout, |
| [DEV_EVENT_VERIFY] = ccw_device_nop, |
| }, |
| /* special states for devices gone not operational */ |
| [DEV_STATE_DISCONNECTED] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_nop, |
| [DEV_EVENT_INTERRUPT] = ccw_device_start_id, |
| [DEV_EVENT_TIMEOUT] = ccw_device_bug, |
| [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_VERIFY] = ccw_device_nop, |
| }, |
| [DEV_STATE_CMFCHANGE] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate, |
| [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate, |
| [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, |
| [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, |
| }, |
| [DEV_STATE_CMFUPDATE] = { |
| [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock, |
| [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock, |
| [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock, |
| [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock, |
| }, |
| }; |
| |
| /* |
| * io_subchannel_irq is called for "real" interrupts or for status |
| * pending conditions on msch. |
| */ |
| void |
| io_subchannel_irq (struct device *pdev) |
| { |
| struct ccw_device *cdev; |
| |
| cdev = to_subchannel(pdev)->dev.driver_data; |
| |
| CIO_TRACE_EVENT (3, "IRQ"); |
| CIO_TRACE_EVENT (3, pdev->bus_id); |
| if (cdev) |
| dev_fsm_event(cdev, DEV_EVENT_INTERRUPT); |
| } |
| |
| EXPORT_SYMBOL_GPL(ccw_device_set_timeout); |