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path: root/drivers/s390/cio/device.c
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Diffstat (limited to 'drivers/s390/cio/device.c')
-rw-r--r--drivers/s390/cio/device.c252
1 files changed, 117 insertions, 135 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index e322111fb36..a23ff582db9 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -56,13 +56,12 @@ ccw_bus_match (struct device * dev, struct device_driver * drv)
/* Store modalias string delimited by prefix/suffix string into buffer with
* specified size. Return length of resulting string (excluding trailing '\0')
* even if string doesn't fit buffer (snprintf semantics). */
-static int snprint_alias(char *buf, size_t size, const char *prefix,
+static int snprint_alias(char *buf, size_t size,
struct ccw_device_id *id, const char *suffix)
{
int len;
- len = snprintf(buf, size, "%sccw:t%04Xm%02X", prefix, id->cu_type,
- id->cu_model);
+ len = snprintf(buf, size, "ccw:t%04Xm%02X", id->cu_type, id->cu_model);
if (len > size)
return len;
buf += len;
@@ -85,53 +84,40 @@ static int ccw_uevent(struct device *dev, char **envp, int num_envp,
struct ccw_device *cdev = to_ccwdev(dev);
struct ccw_device_id *id = &(cdev->id);
int i = 0;
- int len;
+ int len = 0;
+ int ret;
+ char modalias_buf[30];
/* CU_TYPE= */
- len = snprintf(buffer, buffer_size, "CU_TYPE=%04X", id->cu_type) + 1;
- if (len > buffer_size || i >= num_envp)
- return -ENOMEM;
- envp[i++] = buffer;
- buffer += len;
- buffer_size -= len;
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+ "CU_TYPE=%04X", id->cu_type);
+ if (ret)
+ return ret;
/* CU_MODEL= */
- len = snprintf(buffer, buffer_size, "CU_MODEL=%02X", id->cu_model) + 1;
- if (len > buffer_size || i >= num_envp)
- return -ENOMEM;
- envp[i++] = buffer;
- buffer += len;
- buffer_size -= len;
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+ "CU_MODEL=%02X", id->cu_model);
+ if (ret)
+ return ret;
/* The next two can be zero, that's ok for us */
/* DEV_TYPE= */
- len = snprintf(buffer, buffer_size, "DEV_TYPE=%04X", id->dev_type) + 1;
- if (len > buffer_size || i >= num_envp)
- return -ENOMEM;
- envp[i++] = buffer;
- buffer += len;
- buffer_size -= len;
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+ "DEV_TYPE=%04X", id->dev_type);
+ if (ret)
+ return ret;
/* DEV_MODEL= */
- len = snprintf(buffer, buffer_size, "DEV_MODEL=%02X",
- (unsigned char) id->dev_model) + 1;
- if (len > buffer_size || i >= num_envp)
- return -ENOMEM;
- envp[i++] = buffer;
- buffer += len;
- buffer_size -= len;
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+ "DEV_MODEL=%02X", id->dev_model);
+ if (ret)
+ return ret;
/* MODALIAS= */
- len = snprint_alias(buffer, buffer_size, "MODALIAS=", id, "") + 1;
- if (len > buffer_size || i >= num_envp)
- return -ENOMEM;
- envp[i++] = buffer;
- buffer += len;
- buffer_size -= len;
-
- envp[i] = NULL;
-
- return 0;
+ snprint_alias(modalias_buf, sizeof(modalias_buf), id, "");
+ ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+ "MODALIAS=%s", modalias_buf);
+ return ret;
}
struct bus_type ccw_bus_type;
@@ -230,12 +216,18 @@ static ssize_t
chpids_show (struct device * dev, struct device_attribute *attr, char * buf)
{
struct subchannel *sch = to_subchannel(dev);
- struct ssd_info *ssd = &sch->ssd_info;
+ struct chsc_ssd_info *ssd = &sch->ssd_info;
ssize_t ret = 0;
int chp;
+ int mask;
- for (chp = 0; chp < 8; chp++)
- ret += sprintf (buf+ret, "%02x ", ssd->chpid[chp]);
+ for (chp = 0; chp < 8; chp++) {
+ mask = 0x80 >> chp;
+ if (ssd->path_mask & mask)
+ ret += sprintf(buf + ret, "%02x ", ssd->chpid[chp].id);
+ else
+ ret += sprintf(buf + ret, "00 ");
+ }
ret += sprintf (buf+ret, "\n");
return min((ssize_t)PAGE_SIZE, ret);
}
@@ -280,7 +272,7 @@ modalias_show (struct device *dev, struct device_attribute *attr, char *buf)
struct ccw_device_id *id = &(cdev->id);
int len;
- len = snprint_alias(buf, PAGE_SIZE, "", id, "\n") + 1;
+ len = snprint_alias(buf, PAGE_SIZE, id, "\n") + 1;
return len > PAGE_SIZE ? PAGE_SIZE : len;
}
@@ -298,16 +290,10 @@ int ccw_device_is_orphan(struct ccw_device *cdev)
return sch_is_pseudo_sch(to_subchannel(cdev->dev.parent));
}
-static void ccw_device_unregister(struct work_struct *work)
+static void ccw_device_unregister(struct ccw_device *cdev)
{
- struct ccw_device_private *priv;
- struct ccw_device *cdev;
-
- priv = container_of(work, struct ccw_device_private, kick_work);
- cdev = priv->cdev;
if (test_and_clear_bit(1, &cdev->private->registered))
- device_unregister(&cdev->dev);
- put_device(&cdev->dev);
+ device_del(&cdev->dev);
}
static void
@@ -324,11 +310,8 @@ ccw_device_remove_disconnected(struct ccw_device *cdev)
spin_lock_irqsave(cdev->ccwlock, flags);
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
- if (get_device(&cdev->dev)) {
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_unregister);
- queue_work(ccw_device_work, &cdev->private->kick_work);
- }
+ ccw_device_unregister(cdev);
+ put_device(&cdev->dev);
return ;
}
sch = to_subchannel(cdev->dev.parent);
@@ -413,11 +396,60 @@ ccw_device_set_online(struct ccw_device *cdev)
return (ret == 0) ? -ENODEV : ret;
}
-static ssize_t
-online_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+static void online_store_handle_offline(struct ccw_device *cdev)
+{
+ if (cdev->private->state == DEV_STATE_DISCONNECTED)
+ ccw_device_remove_disconnected(cdev);
+ else if (cdev->drv && cdev->drv->set_offline)
+ ccw_device_set_offline(cdev);
+}
+
+static int online_store_recog_and_online(struct ccw_device *cdev)
+{
+ int ret;
+
+ /* Do device recognition, if needed. */
+ if (cdev->id.cu_type == 0) {
+ ret = ccw_device_recognition(cdev);
+ if (ret) {
+ printk(KERN_WARNING"Couldn't start recognition "
+ "for device %s (ret=%d)\n",
+ cdev->dev.bus_id, ret);
+ return ret;
+ }
+ wait_event(cdev->private->wait_q,
+ cdev->private->flags.recog_done);
+ }
+ if (cdev->drv && cdev->drv->set_online)
+ ccw_device_set_online(cdev);
+ return 0;
+}
+static void online_store_handle_online(struct ccw_device *cdev, int force)
+{
+ int ret;
+
+ ret = online_store_recog_and_online(cdev);
+ if (ret)
+ return;
+ if (force && cdev->private->state == DEV_STATE_BOXED) {
+ ret = ccw_device_stlck(cdev);
+ if (ret) {
+ printk(KERN_WARNING"ccw_device_stlck for device %s "
+ "returned %d!\n", cdev->dev.bus_id, ret);
+ return;
+ }
+ if (cdev->id.cu_type == 0)
+ cdev->private->state = DEV_STATE_NOT_OPER;
+ online_store_recog_and_online(cdev);
+ }
+
+}
+
+static ssize_t online_store (struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct ccw_device *cdev = to_ccwdev(dev);
- int i, force, ret;
+ int i, force;
char *tmp;
if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
@@ -434,51 +466,17 @@ online_store (struct device *dev, struct device_attribute *attr, const char *buf
force = 0;
i = simple_strtoul(buf, &tmp, 16);
}
- if (i == 1) {
- /* Do device recognition, if needed. */
- if (cdev->id.cu_type == 0) {
- ret = ccw_device_recognition(cdev);
- if (ret) {
- printk(KERN_WARNING"Couldn't start recognition "
- "for device %s (ret=%d)\n",
- cdev->dev.bus_id, ret);
- goto out;
- }
- wait_event(cdev->private->wait_q,
- cdev->private->flags.recog_done);
- }
- if (cdev->drv && cdev->drv->set_online)
- ccw_device_set_online(cdev);
- } else if (i == 0) {
- if (cdev->private->state == DEV_STATE_DISCONNECTED)
- ccw_device_remove_disconnected(cdev);
- else if (cdev->drv && cdev->drv->set_offline)
- ccw_device_set_offline(cdev);
- }
- if (force && cdev->private->state == DEV_STATE_BOXED) {
- ret = ccw_device_stlck(cdev);
- if (ret) {
- printk(KERN_WARNING"ccw_device_stlck for device %s "
- "returned %d!\n", cdev->dev.bus_id, ret);
- goto out;
- }
- /* Do device recognition, if needed. */
- if (cdev->id.cu_type == 0) {
- cdev->private->state = DEV_STATE_NOT_OPER;
- ret = ccw_device_recognition(cdev);
- if (ret) {
- printk(KERN_WARNING"Couldn't start recognition "
- "for device %s (ret=%d)\n",
- cdev->dev.bus_id, ret);
- goto out;
- }
- wait_event(cdev->private->wait_q,
- cdev->private->flags.recog_done);
- }
- if (cdev->drv && cdev->drv->set_online)
- ccw_device_set_online(cdev);
+
+ switch (i) {
+ case 0:
+ online_store_handle_offline(cdev);
+ break;
+ case 1:
+ online_store_handle_online(cdev, force);
+ break;
+ default:
+ count = -EINVAL;
}
- out:
if (cdev->drv)
module_put(cdev->drv->owner);
atomic_set(&cdev->private->onoff, 0);
@@ -548,17 +546,10 @@ static struct attribute_group ccwdev_attr_group = {
.attrs = ccwdev_attrs,
};
-static int
-device_add_files (struct device *dev)
-{
- return sysfs_create_group(&dev->kobj, &ccwdev_attr_group);
-}
-
-static void
-device_remove_files(struct device *dev)
-{
- sysfs_remove_group(&dev->kobj, &ccwdev_attr_group);
-}
+struct attribute_group *ccwdev_attr_groups[] = {
+ &ccwdev_attr_group,
+ NULL,
+};
/* this is a simple abstraction for device_register that sets the
* correct bus type and adds the bus specific files */
@@ -573,10 +564,6 @@ static int ccw_device_register(struct ccw_device *cdev)
return ret;
set_bit(1, &cdev->private->registered);
- if ((ret = device_add_files(dev))) {
- if (test_and_clear_bit(1, &cdev->private->registered))
- device_del(dev);
- }
return ret;
}
@@ -648,10 +635,6 @@ ccw_device_add_changed(struct work_struct *work)
return;
}
set_bit(1, &cdev->private->registered);
- if (device_add_files(&cdev->dev)) {
- if (test_and_clear_bit(1, &cdev->private->registered))
- device_unregister(&cdev->dev);
- }
}
void ccw_device_do_unreg_rereg(struct work_struct *work)
@@ -664,9 +647,7 @@ void ccw_device_do_unreg_rereg(struct work_struct *work)
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
- device_remove_files(&cdev->dev);
- if (test_and_clear_bit(1, &cdev->private->registered))
- device_del(&cdev->dev);
+ ccw_device_unregister(cdev);
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_add_changed);
queue_work(ccw_device_work, &cdev->private->kick_work);
@@ -705,6 +686,7 @@ static int io_subchannel_initialize_dev(struct subchannel *sch,
cdev->dev.parent = &sch->dev;
cdev->dev.release = ccw_device_release;
INIT_LIST_HEAD(&cdev->private->kick_work.entry);
+ cdev->dev.groups = ccwdev_attr_groups;
/* Do first half of device_register. */
device_initialize(&cdev->dev);
if (!get_device(&sch->dev)) {
@@ -736,6 +718,7 @@ static int io_subchannel_recog(struct ccw_device *, struct subchannel *);
static void sch_attach_device(struct subchannel *sch,
struct ccw_device *cdev)
{
+ css_update_ssd_info(sch);
spin_lock_irq(sch->lock);
sch->dev.driver_data = cdev;
cdev->private->schid = sch->schid;
@@ -871,7 +854,7 @@ io_subchannel_register(struct work_struct *work)
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
-
+ css_update_ssd_info(sch);
/*
* io_subchannel_register() will also be called after device
* recognition has been done for a boxed device (which will already
@@ -888,6 +871,12 @@ io_subchannel_register(struct work_struct *work)
}
goto out;
}
+ /*
+ * Now we know this subchannel will stay, we can throw
+ * our delayed uevent.
+ */
+ sch->dev.uevent_suppress = 0;
+ kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
/* make it known to the system */
ret = ccw_device_register(cdev);
if (ret) {
@@ -1133,15 +1122,8 @@ io_subchannel_remove (struct subchannel *sch)
sch->dev.driver_data = NULL;
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
- /*
- * Put unregistration on workqueue to avoid livelocks on the css bus
- * semaphore.
- */
- if (get_device(&cdev->dev)) {
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_unregister);
- queue_work(ccw_device_work, &cdev->private->kick_work);
- }
+ ccw_device_unregister(cdev);
+ put_device(&cdev->dev);
return 0;
}