![Cornelia Huck](/assets/img/avatar_default.png)
- Move adding subchannel attributes to css_register_subchannel(). - Don't call device_trigger_reprobe() for non-operational devices. - Introduce io_subchannel_create_ccwdev(). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
1329 lines
35 KiB
C
1329 lines
35 KiB
C
/*
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* drivers/s390/cio/device_fsm.c
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* finite state machine for device handling
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*
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* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
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* IBM Corporation
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* Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
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* Martin Schwidefsky (schwidefsky@de.ibm.com)
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/jiffies.h>
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#include <linux/string.h>
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#include <asm/ccwdev.h>
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#include <asm/cio.h>
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#include "cio.h"
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#include "cio_debug.h"
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#include "css.h"
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#include "device.h"
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#include "chsc.h"
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#include "ioasm.h"
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int
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device_is_online(struct subchannel *sch)
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{
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struct ccw_device *cdev;
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if (!sch->dev.driver_data)
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return 0;
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cdev = sch->dev.driver_data;
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return (cdev->private->state == DEV_STATE_ONLINE);
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}
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int
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device_is_disconnected(struct subchannel *sch)
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{
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struct ccw_device *cdev;
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if (!sch->dev.driver_data)
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return 0;
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cdev = sch->dev.driver_data;
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return (cdev->private->state == DEV_STATE_DISCONNECTED ||
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cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID);
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}
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void
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device_set_disconnected(struct subchannel *sch)
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{
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struct ccw_device *cdev;
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if (!sch->dev.driver_data)
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return;
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cdev = sch->dev.driver_data;
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ccw_device_set_timeout(cdev, 0);
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cdev->private->flags.fake_irb = 0;
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cdev->private->state = DEV_STATE_DISCONNECTED;
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}
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void device_set_intretry(struct subchannel *sch)
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{
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struct ccw_device *cdev;
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cdev = sch->dev.driver_data;
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if (!cdev)
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return;
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cdev->private->flags.intretry = 1;
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}
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int device_trigger_verify(struct subchannel *sch)
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{
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struct ccw_device *cdev;
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cdev = sch->dev.driver_data;
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if (!cdev || !cdev->online)
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return -EINVAL;
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dev_fsm_event(cdev, DEV_EVENT_VERIFY);
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return 0;
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}
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/*
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* Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
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*/
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static void
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ccw_device_timeout(unsigned long data)
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{
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struct ccw_device *cdev;
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cdev = (struct ccw_device *) data;
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spin_lock_irq(cdev->ccwlock);
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dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
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spin_unlock_irq(cdev->ccwlock);
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}
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/*
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* Set timeout
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*/
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void
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ccw_device_set_timeout(struct ccw_device *cdev, int expires)
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{
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if (expires == 0) {
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del_timer(&cdev->private->timer);
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return;
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}
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if (timer_pending(&cdev->private->timer)) {
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if (mod_timer(&cdev->private->timer, jiffies + expires))
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return;
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}
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cdev->private->timer.function = ccw_device_timeout;
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cdev->private->timer.data = (unsigned long) cdev;
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cdev->private->timer.expires = jiffies + expires;
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add_timer(&cdev->private->timer);
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}
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/* Kill any pending timers after machine check. */
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void
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device_kill_pending_timer(struct subchannel *sch)
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{
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struct ccw_device *cdev;
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if (!sch->dev.driver_data)
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return;
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cdev = sch->dev.driver_data;
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ccw_device_set_timeout(cdev, 0);
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}
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/*
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* Cancel running i/o. This is called repeatedly since halt/clear are
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* asynchronous operations. We do one try with cio_cancel, two tries
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* with cio_halt, 255 tries with cio_clear. If everythings fails panic.
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* Returns 0 if device now idle, -ENODEV for device not operational and
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* -EBUSY if an interrupt is expected (either from halt/clear or from a
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* status pending).
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*/
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int
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ccw_device_cancel_halt_clear(struct ccw_device *cdev)
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{
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struct subchannel *sch;
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int ret;
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sch = to_subchannel(cdev->dev.parent);
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ret = stsch(sch->schid, &sch->schib);
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if (ret || !sch->schib.pmcw.dnv)
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return -ENODEV;
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if (!sch->schib.pmcw.ena || sch->schib.scsw.actl == 0)
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/* Not operational or no activity -> done. */
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return 0;
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/* Stage 1: cancel io. */
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if (!(sch->schib.scsw.actl & SCSW_ACTL_HALT_PEND) &&
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!(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) {
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ret = cio_cancel(sch);
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if (ret != -EINVAL)
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return ret;
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/* cancel io unsuccessful. From now on it is asynchronous. */
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cdev->private->iretry = 3; /* 3 halt retries. */
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}
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if (!(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) {
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/* Stage 2: halt io. */
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if (cdev->private->iretry) {
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cdev->private->iretry--;
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ret = cio_halt(sch);
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if (ret != -EBUSY)
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return (ret == 0) ? -EBUSY : ret;
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}
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/* halt io unsuccessful. */
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cdev->private->iretry = 255; /* 255 clear retries. */
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}
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/* Stage 3: clear io. */
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if (cdev->private->iretry) {
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cdev->private->iretry--;
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ret = cio_clear (sch);
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return (ret == 0) ? -EBUSY : ret;
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}
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panic("Can't stop i/o on subchannel.\n");
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}
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static int
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ccw_device_handle_oper(struct ccw_device *cdev)
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{
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struct subchannel *sch;
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sch = to_subchannel(cdev->dev.parent);
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cdev->private->flags.recog_done = 1;
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/*
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* Check if cu type and device type still match. If
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* not, it is certainly another device and we have to
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* de- and re-register. Also check here for non-matching devno.
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*/
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if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
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cdev->id.cu_model != cdev->private->senseid.cu_model ||
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cdev->id.dev_type != cdev->private->senseid.dev_type ||
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cdev->id.dev_model != cdev->private->senseid.dev_model ||
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cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
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PREPARE_WORK(&cdev->private->kick_work,
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ccw_device_do_unreg_rereg);
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queue_work(ccw_device_work, &cdev->private->kick_work);
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return 0;
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}
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cdev->private->flags.donotify = 1;
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return 1;
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}
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/*
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* The machine won't give us any notification by machine check if a chpid has
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* been varied online on the SE so we have to find out by magic (i. e. driving
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* the channel subsystem to device selection and updating our path masks).
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*/
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static inline void
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__recover_lost_chpids(struct subchannel *sch, int old_lpm)
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{
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int mask, i;
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for (i = 0; i<8; i++) {
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mask = 0x80 >> i;
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if (!(sch->lpm & mask))
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continue;
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if (old_lpm & mask)
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continue;
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chpid_is_actually_online(sch->schib.pmcw.chpid[i]);
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}
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}
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/*
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* Stop device recognition.
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*/
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static void
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ccw_device_recog_done(struct ccw_device *cdev, int state)
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{
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struct subchannel *sch;
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int notify, old_lpm, same_dev;
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sch = to_subchannel(cdev->dev.parent);
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ccw_device_set_timeout(cdev, 0);
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cio_disable_subchannel(sch);
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/*
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* Now that we tried recognition, we have performed device selection
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* through ssch() and the path information is up to date.
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*/
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old_lpm = sch->lpm;
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stsch(sch->schid, &sch->schib);
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sch->lpm = sch->schib.pmcw.pam & sch->opm;
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/* Check since device may again have become not operational. */
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if (!sch->schib.pmcw.dnv)
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state = DEV_STATE_NOT_OPER;
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if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
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/* Force reprobe on all chpids. */
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old_lpm = 0;
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if (sch->lpm != old_lpm)
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__recover_lost_chpids(sch, old_lpm);
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if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
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if (state == DEV_STATE_NOT_OPER) {
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cdev->private->flags.recog_done = 1;
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cdev->private->state = DEV_STATE_DISCONNECTED;
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return;
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}
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/* Boxed devices don't need extra treatment. */
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}
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notify = 0;
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same_dev = 0; /* Keep the compiler quiet... */
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switch (state) {
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case DEV_STATE_NOT_OPER:
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CIO_DEBUG(KERN_WARNING, 2,
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"SenseID : unknown device %04x on subchannel "
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"0.%x.%04x\n", cdev->private->dev_id.devno,
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sch->schid.ssid, sch->schid.sch_no);
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break;
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case DEV_STATE_OFFLINE:
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if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
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same_dev = ccw_device_handle_oper(cdev);
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notify = 1;
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}
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/* fill out sense information */
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memset(&cdev->id, 0, sizeof(cdev->id));
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cdev->id.cu_type = cdev->private->senseid.cu_type;
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cdev->id.cu_model = cdev->private->senseid.cu_model;
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cdev->id.dev_type = cdev->private->senseid.dev_type;
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cdev->id.dev_model = cdev->private->senseid.dev_model;
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if (notify) {
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cdev->private->state = DEV_STATE_OFFLINE;
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if (same_dev) {
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/* Get device online again. */
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ccw_device_online(cdev);
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wake_up(&cdev->private->wait_q);
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}
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return;
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}
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/* Issue device info message. */
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CIO_DEBUG(KERN_INFO, 2, "SenseID : device 0.%x.%04x reports: "
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"CU Type/Mod = %04X/%02X, Dev Type/Mod = "
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"%04X/%02X\n",
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cdev->private->dev_id.ssid,
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cdev->private->dev_id.devno,
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cdev->id.cu_type, cdev->id.cu_model,
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cdev->id.dev_type, cdev->id.dev_model);
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break;
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case DEV_STATE_BOXED:
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CIO_DEBUG(KERN_WARNING, 2,
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"SenseID : boxed device %04x on subchannel "
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"0.%x.%04x\n", cdev->private->dev_id.devno,
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sch->schid.ssid, sch->schid.sch_no);
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break;
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}
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cdev->private->state = state;
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io_subchannel_recog_done(cdev);
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if (state != DEV_STATE_NOT_OPER)
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wake_up(&cdev->private->wait_q);
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}
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/*
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* Function called from device_id.c after sense id has completed.
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*/
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void
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ccw_device_sense_id_done(struct ccw_device *cdev, int err)
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{
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switch (err) {
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case 0:
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ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
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break;
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case -ETIME: /* Sense id stopped by timeout. */
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ccw_device_recog_done(cdev, DEV_STATE_BOXED);
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break;
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default:
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ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
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break;
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}
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}
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static void
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ccw_device_oper_notify(struct work_struct *work)
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{
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struct ccw_device_private *priv;
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struct ccw_device *cdev;
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struct subchannel *sch;
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int ret;
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priv = container_of(work, struct ccw_device_private, kick_work);
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cdev = priv->cdev;
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sch = to_subchannel(cdev->dev.parent);
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ret = (sch->driver && sch->driver->notify) ?
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sch->driver->notify(&sch->dev, CIO_OPER) : 0;
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if (!ret)
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/* Driver doesn't want device back. */
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ccw_device_do_unreg_rereg(work);
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else {
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/* Reenable channel measurements, if needed. */
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cmf_reenable(cdev);
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wake_up(&cdev->private->wait_q);
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}
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}
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/*
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* Finished with online/offline processing.
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*/
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static void
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ccw_device_done(struct ccw_device *cdev, int state)
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{
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struct subchannel *sch;
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sch = to_subchannel(cdev->dev.parent);
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ccw_device_set_timeout(cdev, 0);
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if (state != DEV_STATE_ONLINE)
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cio_disable_subchannel(sch);
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/* Reset device status. */
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memset(&cdev->private->irb, 0, sizeof(struct irb));
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cdev->private->state = state;
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if (state == DEV_STATE_BOXED)
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CIO_DEBUG(KERN_WARNING, 2,
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"Boxed device %04x on subchannel %04x\n",
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cdev->private->dev_id.devno, sch->schid.sch_no);
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if (cdev->private->flags.donotify) {
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cdev->private->flags.donotify = 0;
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PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify);
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queue_work(ccw_device_notify_work, &cdev->private->kick_work);
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}
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wake_up(&cdev->private->wait_q);
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if (css_init_done && state != DEV_STATE_ONLINE)
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put_device (&cdev->dev);
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}
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static inline int cmp_pgid(struct pgid *p1, struct pgid *p2)
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{
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char *c1;
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char *c2;
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c1 = (char *)p1;
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c2 = (char *)p2;
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return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
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}
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static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
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{
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int i;
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int last;
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last = 0;
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for (i = 0; i < 8; i++) {
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if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
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/* No PGID yet */
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continue;
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if (cdev->private->pgid[last].inf.ps.state1 ==
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SNID_STATE1_RESET) {
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/* First non-zero PGID */
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last = i;
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continue;
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}
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if (cmp_pgid(&cdev->private->pgid[i],
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&cdev->private->pgid[last]) == 0)
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/* Non-conflicting PGIDs */
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continue;
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/* PGID mismatch, can't pathgroup. */
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CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
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"0.%x.%04x, can't pathgroup\n",
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cdev->private->dev_id.ssid,
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cdev->private->dev_id.devno);
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cdev->private->options.pgroup = 0;
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return;
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}
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if (cdev->private->pgid[last].inf.ps.state1 ==
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SNID_STATE1_RESET)
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/* No previous pgid found */
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memcpy(&cdev->private->pgid[0], &css[0]->global_pgid,
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sizeof(struct pgid));
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else
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/* Use existing pgid */
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memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
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sizeof(struct pgid));
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}
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/*
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* Function called from device_pgid.c after sense path ground has completed.
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*/
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void
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ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
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{
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struct subchannel *sch;
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sch = to_subchannel(cdev->dev.parent);
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switch (err) {
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case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
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cdev->private->options.pgroup = 0;
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break;
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case 0: /* success */
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case -EACCES: /* partial success, some paths not operational */
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/* Check if all pgids are equal or 0. */
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__ccw_device_get_common_pgid(cdev);
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break;
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case -ETIME: /* Sense path group id stopped by timeout. */
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case -EUSERS: /* device is reserved for someone else. */
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ccw_device_done(cdev, DEV_STATE_BOXED);
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return;
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default:
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ccw_device_done(cdev, DEV_STATE_NOT_OPER);
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return;
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}
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/* Start Path Group verification. */
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cdev->private->state = DEV_STATE_VERIFY;
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cdev->private->flags.doverify = 0;
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ccw_device_verify_start(cdev);
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}
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/*
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* Start device recognition.
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*/
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int
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ccw_device_recognition(struct ccw_device *cdev)
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{
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struct subchannel *sch;
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int ret;
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if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
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(cdev->private->state != DEV_STATE_BOXED))
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return -EINVAL;
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sch = to_subchannel(cdev->dev.parent);
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ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc);
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if (ret != 0)
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/* Couldn't enable the subchannel for i/o. Sick device. */
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return ret;
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|
|
/* 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(struct work_struct *work)
|
|
{
|
|
struct ccw_device_private *priv;
|
|
struct ccw_device *cdev;
|
|
struct subchannel *sch;
|
|
int ret;
|
|
|
|
priv = container_of(work, struct ccw_device_private, kick_work);
|
|
cdev = priv->cdev;
|
|
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);
|
|
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:
|
|
/* Reset oper notify indication after verify error. */
|
|
cdev->private->flags.donotify = 0;
|
|
ccw_device_done(cdev, DEV_STATE_BOXED);
|
|
break;
|
|
default:
|
|
/* Reset oper notify indication after verify error. */
|
|
cdev->private->flags.donotify = 0;
|
|
PREPARE_WORK(&cdev->private->kick_work,
|
|
ccw_device_nopath_notify);
|
|
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);
|
|
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);
|
|
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);
|
|
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)) {
|
|
/* 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);
|
|
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(-EIO));
|
|
if (!sch->lpm) {
|
|
PREPARE_WORK(&cdev->private->kick_work,
|
|
ccw_device_nopath_notify);
|
|
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);
|
|
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(-EIO));
|
|
}
|
|
|
|
void device_kill_io(struct subchannel *sch)
|
|
{
|
|
int ret;
|
|
struct ccw_device *cdev;
|
|
|
|
cdev = sch->dev.driver_data;
|
|
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);
|
|
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(-EIO));
|
|
if (!sch->lpm) {
|
|
PREPARE_WORK(&cdev->private->kick_work,
|
|
ccw_device_nopath_notify);
|
|
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
|
|
} else
|
|
/* 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;
|
|
if (!sch->schib.pmcw.dnv)
|
|
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_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);
|