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-rw-r--r--drivers/s390/cio/ccwgroup.c78
-rw-r--r--drivers/s390/cio/chsc.c3
-rw-r--r--drivers/s390/cio/chsc.h1
-rw-r--r--drivers/s390/cio/chsc_sch.c32
-rw-r--r--drivers/s390/cio/cmf.c5
-rw-r--r--drivers/s390/cio/css.c157
-rw-r--r--drivers/s390/cio/css.h10
-rw-r--r--drivers/s390/cio/device.c260
-rw-r--r--drivers/s390/cio/device.h3
-rw-r--r--drivers/s390/cio/device_fsm.c96
-rw-r--r--drivers/s390/cio/device_ops.c26
-rw-r--r--drivers/s390/cio/io_sch.h1
12 files changed, 599 insertions, 73 deletions
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 22ce765d537e..a5a62f1f7747 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -1,11 +1,10 @@
/*
- * drivers/s390/cio/ccwgroup.c
* bus driver for ccwgroup
*
- * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
- * IBM Corporation
- * Author(s): Arnd Bergmann (arndb@de.ibm.com)
- * Cornelia Huck (cornelia.huck@de.ibm.com)
+ * Copyright IBM Corp. 2002, 2009
+ *
+ * Author(s): Arnd Bergmann (arndb@de.ibm.com)
+ * Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#include <linux/module.h>
#include <linux/errno.h>
@@ -501,6 +500,74 @@ static void ccwgroup_shutdown(struct device *dev)
gdrv->shutdown(gdev);
}
+static int ccwgroup_pm_prepare(struct device *dev)
+{
+ struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+ struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
+
+ /* Fail while device is being set online/offline. */
+ if (atomic_read(&gdev->onoff))
+ return -EAGAIN;
+
+ if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
+ return 0;
+
+ return gdrv->prepare ? gdrv->prepare(gdev) : 0;
+}
+
+static void ccwgroup_pm_complete(struct device *dev)
+{
+ struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+ struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
+
+ if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
+ return;
+
+ if (gdrv->complete)
+ gdrv->complete(gdev);
+}
+
+static int ccwgroup_pm_freeze(struct device *dev)
+{
+ struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+ struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
+
+ if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
+ return 0;
+
+ return gdrv->freeze ? gdrv->freeze(gdev) : 0;
+}
+
+static int ccwgroup_pm_thaw(struct device *dev)
+{
+ struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+ struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
+
+ if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
+ return 0;
+
+ return gdrv->thaw ? gdrv->thaw(gdev) : 0;
+}
+
+static int ccwgroup_pm_restore(struct device *dev)
+{
+ struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+ struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
+
+ if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
+ return 0;
+
+ return gdrv->restore ? gdrv->restore(gdev) : 0;
+}
+
+static struct dev_pm_ops ccwgroup_pm_ops = {
+ .prepare = ccwgroup_pm_prepare,
+ .complete = ccwgroup_pm_complete,
+ .freeze = ccwgroup_pm_freeze,
+ .thaw = ccwgroup_pm_thaw,
+ .restore = ccwgroup_pm_restore,
+};
+
static struct bus_type ccwgroup_bus_type = {
.name = "ccwgroup",
.match = ccwgroup_bus_match,
@@ -508,6 +575,7 @@ static struct bus_type ccwgroup_bus_type = {
.probe = ccwgroup_probe,
.remove = ccwgroup_remove,
.shutdown = ccwgroup_shutdown,
+ .pm = &ccwgroup_pm_ops,
};
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 883f16f96f22..1ecd3e567648 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -549,8 +549,7 @@ cleanup:
return ret;
}
-static int
-__chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
+int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
{
struct {
struct chsc_header request;
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index ba59bceace98..425e8f89a6c5 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -90,6 +90,7 @@ extern void chsc_free_sei_area(void);
extern int chsc_enable_facility(int);
struct channel_subsystem;
extern int chsc_secm(struct channel_subsystem *, int);
+int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page);
int chsc_chp_vary(struct chp_id chpid, int on);
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index 93eca1731b81..cc5144b6f9d9 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -1,7 +1,8 @@
/*
* Driver for s390 chsc subchannels
*
- * Copyright IBM Corp. 2008
+ * Copyright IBM Corp. 2008, 2009
+ *
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
*
*/
@@ -112,6 +113,31 @@ static void chsc_subchannel_shutdown(struct subchannel *sch)
cio_disable_subchannel(sch);
}
+static int chsc_subchannel_prepare(struct subchannel *sch)
+{
+ int cc;
+ struct schib schib;
+ /*
+ * Don't allow suspend while the subchannel is not idle
+ * since we don't have a way to clear the subchannel and
+ * cannot disable it with a request running.
+ */
+ cc = stsch(sch->schid, &schib);
+ if (!cc && scsw_stctl(&schib.scsw))
+ return -EAGAIN;
+ return 0;
+}
+
+static int chsc_subchannel_freeze(struct subchannel *sch)
+{
+ return cio_disable_subchannel(sch);
+}
+
+static int chsc_subchannel_restore(struct subchannel *sch)
+{
+ return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
+}
+
static struct css_device_id chsc_subchannel_ids[] = {
{ .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
{ /* end of list */ },
@@ -125,6 +151,10 @@ static struct css_driver chsc_subchannel_driver = {
.probe = chsc_subchannel_probe,
.remove = chsc_subchannel_remove,
.shutdown = chsc_subchannel_shutdown,
+ .prepare = chsc_subchannel_prepare,
+ .freeze = chsc_subchannel_freeze,
+ .thaw = chsc_subchannel_restore,
+ .restore = chsc_subchannel_restore,
.name = "chsc_subchannel",
};
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index dc98b2c63862..30f516111307 100644
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -1204,6 +1204,11 @@ static ssize_t cmb_enable_store(struct device *dev,
DEVICE_ATTR(cmb_enable, 0644, cmb_enable_show, cmb_enable_store);
+int ccw_set_cmf(struct ccw_device *cdev, int enable)
+{
+ return cmbops->set(cdev, enable ? 2 : 0);
+}
+
/**
* enable_cmf() - switch on the channel measurement for a specific device
* @cdev: The ccw device to be enabled
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 0085d8901792..85d43c6bcb66 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -1,10 +1,10 @@
/*
- * drivers/s390/cio/css.c
- * driver for channel subsystem
+ * driver for channel subsystem
*
- * Copyright IBM Corp. 2002,2008
- * Author(s): Arnd Bergmann (arndb@de.ibm.com)
- * Cornelia Huck (cornelia.huck@de.ibm.com)
+ * Copyright IBM Corp. 2002, 2009
+ *
+ * Author(s): Arnd Bergmann (arndb@de.ibm.com)
+ * Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#define KMSG_COMPONENT "cio"
@@ -17,6 +17,7 @@
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/reboot.h>
+#include <linux/suspend.h>
#include <asm/isc.h>
#include <asm/crw.h>
@@ -780,6 +781,79 @@ static struct notifier_block css_reboot_notifier = {
};
/*
+ * Since the css devices are neither on a bus nor have a class
+ * nor have a special device type, we cannot stop/restart channel
+ * path measurements via the normal suspend/resume callbacks, but have
+ * to use notifiers.
+ */
+static int css_power_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ void *secm_area;
+ int ret, i;
+
+ switch (event) {
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ ret = NOTIFY_DONE;
+ for (i = 0; i <= __MAX_CSSID; i++) {
+ struct channel_subsystem *css;
+
+ css = channel_subsystems[i];
+ mutex_lock(&css->mutex);
+ if (!css->cm_enabled) {
+ mutex_unlock(&css->mutex);
+ continue;
+ }
+ secm_area = (void *)get_zeroed_page(GFP_KERNEL |
+ GFP_DMA);
+ if (secm_area) {
+ if (__chsc_do_secm(css, 0, secm_area))
+ ret = NOTIFY_BAD;
+ free_page((unsigned long)secm_area);
+ } else
+ ret = NOTIFY_BAD;
+
+ mutex_unlock(&css->mutex);
+ }
+ break;
+ case PM_POST_HIBERNATION:
+ case PM_POST_SUSPEND:
+ ret = NOTIFY_DONE;
+ for (i = 0; i <= __MAX_CSSID; i++) {
+ struct channel_subsystem *css;
+
+ css = channel_subsystems[i];
+ mutex_lock(&css->mutex);
+ if (!css->cm_enabled) {
+ mutex_unlock(&css->mutex);
+ continue;
+ }
+ secm_area = (void *)get_zeroed_page(GFP_KERNEL |
+ GFP_DMA);
+ if (secm_area) {
+ if (__chsc_do_secm(css, 1, secm_area))
+ ret = NOTIFY_BAD;
+ free_page((unsigned long)secm_area);
+ } else
+ ret = NOTIFY_BAD;
+
+ mutex_unlock(&css->mutex);
+ }
+ /* search for subchannels, which appeared during hibernation */
+ css_schedule_reprobe();
+ break;
+ default:
+ ret = NOTIFY_DONE;
+ }
+ return ret;
+
+}
+static struct notifier_block css_power_notifier = {
+ .notifier_call = css_power_event,
+};
+
+/*
* Now that the driver core is running, we can setup our channel subsystem.
* The struct subchannel's are created during probing (except for the
* static console subchannel).
@@ -852,6 +926,11 @@ init_channel_subsystem (void)
ret = register_reboot_notifier(&css_reboot_notifier);
if (ret)
goto out_unregister;
+ ret = register_pm_notifier(&css_power_notifier);
+ if (ret) {
+ unregister_reboot_notifier(&css_reboot_notifier);
+ goto out_unregister;
+ }
css_init_done = 1;
/* Enable default isc for I/O subchannels. */
@@ -953,6 +1032,73 @@ static int css_uevent(struct device *dev, struct kobj_uevent_env *env)
return ret;
}
+static int css_pm_prepare(struct device *dev)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ struct css_driver *drv;
+
+ if (mutex_is_locked(&sch->reg_mutex))
+ return -EAGAIN;
+ if (!sch->dev.driver)
+ return 0;
+ drv = to_cssdriver(sch->dev.driver);
+ /* Notify drivers that they may not register children. */
+ return drv->prepare ? drv->prepare(sch) : 0;
+}
+
+static void css_pm_complete(struct device *dev)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ struct css_driver *drv;
+
+ if (!sch->dev.driver)
+ return;
+ drv = to_cssdriver(sch->dev.driver);
+ if (drv->complete)
+ drv->complete(sch);
+}
+
+static int css_pm_freeze(struct device *dev)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ struct css_driver *drv;
+
+ if (!sch->dev.driver)
+ return 0;
+ drv = to_cssdriver(sch->dev.driver);
+ return drv->freeze ? drv->freeze(sch) : 0;
+}
+
+static int css_pm_thaw(struct device *dev)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ struct css_driver *drv;
+
+ if (!sch->dev.driver)
+ return 0;
+ drv = to_cssdriver(sch->dev.driver);
+ return drv->thaw ? drv->thaw(sch) : 0;
+}
+
+static int css_pm_restore(struct device *dev)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ struct css_driver *drv;
+
+ if (!sch->dev.driver)
+ return 0;
+ drv = to_cssdriver(sch->dev.driver);
+ return drv->restore ? drv->restore(sch) : 0;
+}
+
+static struct dev_pm_ops css_pm_ops = {
+ .prepare = css_pm_prepare,
+ .complete = css_pm_complete,
+ .freeze = css_pm_freeze,
+ .thaw = css_pm_thaw,
+ .restore = css_pm_restore,
+};
+
struct bus_type css_bus_type = {
.name = "css",
.match = css_bus_match,
@@ -960,6 +1106,7 @@ struct bus_type css_bus_type = {
.remove = css_remove,
.shutdown = css_shutdown,
.uevent = css_uevent,
+ .pm = &css_pm_ops,
};
/**
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 57ebf120f825..9763eeec7458 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -70,6 +70,11 @@ struct chp_link;
* @probe: function called on probe
* @remove: function called on remove
* @shutdown: called at device shutdown
+ * @prepare: prepare for pm state transition
+ * @complete: undo work done in @prepare
+ * @freeze: callback for freezing during hibernation snapshotting
+ * @thaw: undo work done in @freeze
+ * @restore: callback for restoring after hibernation
* @name: name of the device driver
*/
struct css_driver {
@@ -82,6 +87,11 @@ struct css_driver {
int (*probe)(struct subchannel *);
int (*remove)(struct subchannel *);
void (*shutdown)(struct subchannel *);
+ int (*prepare) (struct subchannel *);
+ void (*complete) (struct subchannel *);
+ int (*freeze)(struct subchannel *);
+ int (*thaw) (struct subchannel *);
+ int (*restore)(struct subchannel *);
const char *name;
};
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 35441fa16be1..3c57c1a18bb8 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -138,6 +138,19 @@ static struct css_device_id io_subchannel_ids[] = {
};
MODULE_DEVICE_TABLE(css, io_subchannel_ids);
+static int io_subchannel_prepare(struct subchannel *sch)
+{
+ struct ccw_device *cdev;
+ /*
+ * Don't allow suspend while a ccw device registration
+ * is still outstanding.
+ */
+ cdev = sch_get_cdev(sch);
+ if (cdev && !device_is_registered(&cdev->dev))
+ return -EAGAIN;
+ return 0;
+}
+
static struct css_driver io_subchannel_driver = {
.owner = THIS_MODULE,
.subchannel_type = io_subchannel_ids,
@@ -148,6 +161,7 @@ static struct css_driver io_subchannel_driver = {
.probe = io_subchannel_probe,
.remove = io_subchannel_remove,
.shutdown = io_subchannel_shutdown,
+ .prepare = io_subchannel_prepare,
};
struct workqueue_struct *ccw_device_work;
@@ -1775,6 +1789,15 @@ ccw_device_probe_console(void)
return &console_cdev;
}
+static int ccw_device_pm_restore(struct device *dev);
+
+int ccw_device_force_console(void)
+{
+ if (!console_cdev_in_use)
+ return -ENODEV;
+ return ccw_device_pm_restore(&console_cdev.dev);
+}
+EXPORT_SYMBOL_GPL(ccw_device_force_console);
const char *cio_get_console_cdev_name(struct subchannel *sch)
{
@@ -1895,6 +1918,242 @@ static void ccw_device_shutdown(struct device *dev)
disable_cmf(cdev);
}
+static int ccw_device_pm_prepare(struct device *dev)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+
+ if (work_pending(&cdev->private->kick_work))
+ return -EAGAIN;
+ /* Fail while device is being set online/offline. */
+ if (atomic_read(&cdev->private->onoff))
+ return -EAGAIN;
+
+ if (cdev->online && cdev->drv && cdev->drv->prepare)
+ return cdev->drv->prepare(cdev);
+
+ return 0;
+}
+
+static void ccw_device_pm_complete(struct device *dev)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+
+ if (cdev->online && cdev->drv && cdev->drv->complete)
+ cdev->drv->complete(cdev);
+}
+
+static int ccw_device_pm_freeze(struct device *dev)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ int ret, cm_enabled;
+
+ /* Fail suspend while device is in transistional state. */
+ if (!dev_fsm_final_state(cdev))
+ return -EAGAIN;
+ if (!cdev->online)
+ return 0;
+ if (cdev->drv && cdev->drv->freeze) {
+ ret = cdev->drv->freeze(cdev);
+ if (ret)
+ return ret;
+ }
+
+ spin_lock_irq(sch->lock);
+ cm_enabled = cdev->private->cmb != NULL;
+ spin_unlock_irq(sch->lock);
+ if (cm_enabled) {
+ /* Don't have the css write on memory. */
+ ret = ccw_set_cmf(cdev, 0);
+ if (ret)
+ return ret;
+ }
+ /* From here on, disallow device driver I/O. */
+ spin_lock_irq(sch->lock);
+ ret = cio_disable_subchannel(sch);
+ spin_unlock_irq(sch->lock);
+
+ return ret;
+}
+
+static int ccw_device_pm_thaw(struct device *dev)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ int ret, cm_enabled;
+
+ if (!cdev->online)
+ return 0;
+
+ spin_lock_irq(sch->lock);
+ /* Allow device driver I/O again. */
+ ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
+ cm_enabled = cdev->private->cmb != NULL;
+ spin_unlock_irq(sch->lock);
+ if (ret)
+ return ret;
+
+ if (cm_enabled) {
+ ret = ccw_set_cmf(cdev, 1);
+ if (ret)
+ return ret;
+ }
+
+ if (cdev->drv && cdev->drv->thaw)
+ ret = cdev->drv->thaw(cdev);
+
+ return ret;
+}
+
+static void __ccw_device_pm_restore(struct ccw_device *cdev)
+{
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ int ret;
+
+ if (cio_is_console(sch->schid))
+ goto out;
+ /*
+ * While we were sleeping, devices may have gone or become
+ * available again. Kick re-detection.
+ */
+ spin_lock_irq(sch->lock);
+ cdev->private->flags.resuming = 1;
+ ret = ccw_device_recognition(cdev);
+ spin_unlock_irq(sch->lock);
+ if (ret) {
+ CIO_MSG_EVENT(0, "Couldn't start recognition for device "
+ "%s (ret=%d)\n", dev_name(&cdev->dev), ret);
+ spin_lock_irq(sch->lock);
+ cdev->private->state = DEV_STATE_DISCONNECTED;
+ spin_unlock_irq(sch->lock);
+ /* notify driver after the resume cb */
+ goto out;
+ }
+ wait_event(cdev->private->wait_q, dev_fsm_final_state(cdev) ||
+ cdev->private->state == DEV_STATE_DISCONNECTED);
+
+out:
+ cdev->private->flags.resuming = 0;
+}
+
+static int resume_handle_boxed(struct ccw_device *cdev)
+{
+ cdev->private->state = DEV_STATE_BOXED;
+ if (ccw_device_notify(cdev, CIO_BOXED))
+ return 0;
+ ccw_device_schedule_sch_unregister(cdev);
+ return -ENODEV;
+}
+
+static int resume_handle_disc(struct ccw_device *cdev)
+{
+ cdev->private->state = DEV_STATE_DISCONNECTED;
+ if (ccw_device_notify(cdev, CIO_GONE))
+ return 0;
+ ccw_device_schedule_sch_unregister(cdev);
+ return -ENODEV;
+}
+
+static int ccw_device_pm_restore(struct device *dev)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ int ret = 0, cm_enabled;
+
+ __ccw_device_pm_restore(cdev);
+ spin_lock_irq(sch->lock);
+ if (cio_is_console(sch->schid)) {
+ cio_enable_subchannel(sch, (u32)(addr_t)sch);
+ spin_unlock_irq(sch->lock);
+ goto out_restore;
+ }
+ cdev->private->flags.donotify = 0;
+ /* check recognition results */
+ switch (cdev->private->state) {
+ case DEV_STATE_OFFLINE:
+ break;
+ case DEV_STATE_BOXED:
+ ret = resume_handle_boxed(cdev);
+ spin_unlock_irq(sch->lock);
+ if (ret)
+ goto out;
+ goto out_restore;
+ case DEV_STATE_DISCONNECTED:
+ goto out_disc_unlock;
+ default:
+ goto out_unreg_unlock;
+ }
+ /* check if the device id has changed */
+ if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
+ CIO_MSG_EVENT(0, "resume: sch %s: failed (devno changed from "
+ "%04x to %04x)\n", dev_name(&sch->dev),
+ cdev->private->dev_id.devno,
+ sch->schib.pmcw.dev);
+ goto out_unreg_unlock;
+ }
+ /* check if the device type has changed */
+ if (!ccw_device_test_sense_data(cdev)) {
+ ccw_device_update_sense_data(cdev);
+ PREPARE_WORK(&cdev->private->kick_work,
+ ccw_device_do_unbind_bind);
+ queue_work(ccw_device_work, &cdev->private->kick_work);
+ ret = -ENODEV;
+ goto out_unlock;
+ }
+ if (!cdev->online) {
+ ret = 0;
+ goto out_unlock;
+ }
+ ret = ccw_device_online(cdev);
+ if (ret)
+ goto out_disc_unlock;
+
+ cm_enabled = cdev->private->cmb != NULL;
+ spin_unlock_irq(sch->lock);
+
+ wait_event(cdev->private->wait_q, dev_fsm_final_state(cdev));
+ if (cdev->private->state != DEV_STATE_ONLINE) {
+ spin_lock_irq(sch->lock);
+ goto out_disc_unlock;
+ }
+ if (cm_enabled) {
+ ret = ccw_set_cmf(cdev, 1);
+ if (ret) {
+ CIO_MSG_EVENT(2, "resume: cdev %s: cmf failed "
+ "(rc=%d)\n", dev_name(&cdev->dev), ret);
+ ret = 0;
+ }
+ }
+
+out_restore:
+ if (cdev->online && cdev->drv && cdev->drv->restore)
+ ret = cdev->drv->restore(cdev);
+out:
+ return ret;
+
+out_disc_unlock:
+ ret = resume_handle_disc(cdev);
+ spin_unlock_irq(sch->lock);
+ if (ret)
+ return ret;
+ goto out_restore;
+
+out_unreg_unlock:
+ ccw_device_schedule_sch_unregister(cdev);
+ ret = -ENODEV;
+out_unlock:
+ spin_unlock_irq(sch->lock);
+ return ret;
+}
+
+static struct dev_pm_ops ccw_pm_ops = {
+ .prepare = ccw_device_pm_prepare,
+ .complete = ccw_device_pm_complete,
+ .freeze = ccw_device_pm_freeze,
+ .thaw = ccw_device_pm_thaw,
+ .restore = ccw_device_pm_restore,
+};
+
struct bus_type ccw_bus_type = {
.name = "ccw",
.match = ccw_bus_match,
@@ -1902,6 +2161,7 @@ struct bus_type ccw_bus_type = {
.probe = ccw_device_probe,
.remove = ccw_device_remove,
.shutdown = ccw_device_shutdown,
+ .pm = &ccw_pm_ops,
};
/**
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h
index f1cbbd94ad4e..e3975107a578 100644
--- a/drivers/s390/cio/device.h
+++ b/drivers/s390/cio/device.h
@@ -87,6 +87,8 @@ int ccw_device_is_orphan(struct ccw_device *);
int ccw_device_recognition(struct ccw_device *);
int ccw_device_online(struct ccw_device *);
int ccw_device_offline(struct ccw_device *);
+void ccw_device_update_sense_data(struct ccw_device *);
+int ccw_device_test_sense_data(struct ccw_device *);
void ccw_device_schedule_sch_unregister(struct ccw_device *);
int ccw_purge_blacklisted(void);
@@ -133,5 +135,6 @@ extern struct bus_type ccw_bus_type;
void retry_set_schib(struct ccw_device *cdev);
void cmf_retry_copy_block(struct ccw_device *);
int cmf_reenable(struct ccw_device *);
+int ccw_set_cmf(struct ccw_device *cdev, int enable);
extern struct device_attribute dev_attr_cmb_enable;
#endif
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index e46049261561..3db88c52d287 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -177,29 +177,21 @@ ccw_device_cancel_halt_clear(struct ccw_device *cdev)
panic("Can't stop i/o on subchannel.\n");
}
-static int
-ccw_device_handle_oper(struct ccw_device *cdev)
+void ccw_device_update_sense_data(struct ccw_device *cdev)
{
- struct subchannel *sch;
+ memset(&cdev->id, 0, sizeof(cdev->id));
+ cdev->id.cu_type = cdev->private->senseid.cu_type;
+ cdev->id.cu_model = cdev->private->senseid.cu_model;
+ cdev->id.dev_type = cdev->private->senseid.dev_type;
+ cdev->id.dev_model = cdev->private->senseid.dev_model;
+}
- sch = to_subchannel(cdev->dev.parent);
- cdev->private->flags.recog_done = 1;
- /*
- * Check if cu type and device type still match. If
- * not, it is certainly another device and we have to
- * de- and re-register.
- */
- if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
- cdev->id.cu_model != cdev->private->senseid.cu_model ||
- cdev->id.dev_type != cdev->private->senseid.dev_type ||
- cdev->id.dev_model != cdev->private->senseid.dev_model) {
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_do_unbind_bind);
- queue_work(ccw_device_work, &cdev->private->kick_work);
- return 0;
- }
- cdev->private->flags.donotify = 1;
- return 1;
+int ccw_device_test_sense_data(struct ccw_device *cdev)
+{
+ return cdev->id.cu_type == cdev->private->senseid.cu_type &&
+ cdev->id.cu_model == cdev->private->senseid.cu_model &&
+ cdev->id.dev_type == cdev->private->senseid.dev_type &&
+ cdev->id.dev_model == cdev->private->senseid.dev_model;
}
/*
@@ -233,7 +225,7 @@ static void
ccw_device_recog_done(struct ccw_device *cdev, int state)
{
struct subchannel *sch;
- int notify, old_lpm, same_dev;
+ int old_lpm;
sch = to_subchannel(cdev->dev.parent);
@@ -263,8 +255,12 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
wake_up(&cdev->private->wait_q);
return;
}
- notify = 0;
- same_dev = 0; /* Keep the compiler quiet... */
+ if (cdev->private->flags.resuming) {
+ cdev->private->state = state;
+ cdev->private->flags.recog_done = 1;
+ wake_up(&cdev->private->wait_q);
+ return;
+ }
switch (state) {
case DEV_STATE_NOT_OPER:
CIO_MSG_EVENT(2, "SenseID : unknown device %04x on "
@@ -273,34 +269,31 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
sch->schid.ssid, sch->schid.sch_no);
break;
case DEV_STATE_OFFLINE:
- if (cdev->online) {
- same_dev = ccw_device_handle_oper(cdev);
- notify = 1;
+ if (!cdev->online) {
+ ccw_device_update_sense_data(cdev);
+ /* Issue device info message. */
+ CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
+ "CU Type/Mod = %04X/%02X, Dev Type/Mod "
+ "= %04X/%02X\n",
+ cdev->private->dev_id.ssid,
+ cdev->private->dev_id.devno,
+ cdev->id.cu_type, cdev->id.cu_model,
+ cdev->id.dev_type, cdev->id.dev_model);
+ break;
}
- /* fill out sense information */
- memset(&cdev->id, 0, sizeof(cdev->id));
- cdev->id.cu_type = cdev->private->senseid.cu_type;
- cdev->id.cu_model = cdev->private->senseid.cu_model;
- cdev->id.dev_type = cdev->private->senseid.dev_type;
- cdev->id.dev_model = cdev->private->senseid.dev_model;
- if (notify) {
- cdev->private->state = DEV_STATE_OFFLINE;
- if (same_dev) {
- /* Get device online again. */
- ccw_device_online(cdev);
- wake_up(&cdev->private->wait_q);
- }
- return;
+ cdev->private->state = DEV_STATE_OFFLINE;
+ cdev->private->flags.recog_done = 1;
+ if (ccw_device_test_sense_data(cdev)) {
+ cdev->private->flags.donotify = 1;
+ ccw_device_online(cdev);
+ wake_up(&cdev->private->wait_q);
+ } else {
+ ccw_device_update_sense_data(cdev);
+ PREPARE_WORK(&cdev->private->kick_work,
+ ccw_device_do_unbind_bind);
+ queue_work(ccw_device_work, &cdev->private->kick_work);
}
- /* Issue device info message. */
- CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
- "CU Type/Mod = %04X/%02X, Dev Type/Mod = "
- "%04X/%02X\n",
- cdev->private->dev_id.ssid,
- cdev->private->dev_id.devno,
- cdev->id.cu_type, cdev->id.cu_model,
- cdev->id.dev_type, cdev->id.dev_model);
- break;
+ return;
case DEV_STATE_BOXED:
CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
" subchannel 0.%x.%04x\n",
@@ -502,9 +495,6 @@ ccw_device_recognition(struct ccw_device *cdev)
struct subchannel *sch;
int ret;
- if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
- (cdev->private->state != DEV_STATE_BOXED))
- return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
if (ret != 0)
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index bf0a24af39a0..2d0efee8a290 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -1,10 +1,8 @@
/*
- * drivers/s390/cio/device_ops.c
+ * Copyright IBM Corp. 2002, 2009
*
- * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
- * IBM Corporation
- * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
- * Cornelia Huck (cornelia.huck@de.ibm.com)
+ * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ * Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#include <linux/module.h>
#include <linux/init.h>
@@ -116,12 +114,15 @@ int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
+ sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
- sch = to_subchannel(cdev->dev.parent);
+
ret = cio_clear(sch);
if (ret == 0)
cdev->private->intparm = intparm;
@@ -162,6 +163,8 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state == DEV_STATE_VERIFY ||
@@ -337,12 +340,15 @@ int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
+ sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
- sch = to_subchannel(cdev->dev.parent);
+
ret = cio_halt(sch);
if (ret == 0)
cdev->private->intparm = intparm;
@@ -369,6 +375,8 @@ int ccw_device_resume(struct ccw_device *cdev)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE ||
@@ -580,6 +588,8 @@ int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw,
int rc;
sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
/* Adjust requested path mask to excluded varied off paths. */
@@ -669,6 +679,8 @@ int ccw_device_tm_intrg(struct ccw_device *cdev)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
if (!scsw_is_tm(&sch->schib.scsw) ||
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h
index c4f3e7c9a854..0b8f381bd20e 100644
--- a/drivers/s390/cio/io_sch.h
+++ b/drivers/s390/cio/io_sch.h
@@ -107,6 +107,7 @@ struct ccw_device_private {
unsigned int recog_done:1; /* dev. recog. complete */
unsigned int fake_irb:1; /* deliver faked irb */
unsigned int intretry:1; /* retry internal operation */
+ unsigned int resuming:1; /* recognition while resume */
} __attribute__((packed)) flags;
unsigned long intparm; /* user interruption parameter */
struct qdio_irq *qdio_data;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-20 00:44:38 +0000