* Cornelia Huck (cornelia.huck@de.ibm.com)
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
return 1;
}
-/*
- * Hotplugging interface for ccw devices.
- * Heavily modeled on pci and usb hotplug.
- */
-static int
-ccw_uevent (struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+/* 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,
+ struct ccw_device_id *id, const char *suffix)
{
- struct ccw_device *cdev = to_ccwdev(dev);
- int i = 0;
- int length = 0;
+ int len;
- if (!cdev)
- return -ENODEV;
+ len = snprintf(buf, size, "%sccw:t%04Xm%02X", prefix, id->cu_type,
+ id->cu_model);
+ if (len > size)
+ return len;
+ buf += len;
+ size -= len;
- /* what we want to pass to /sbin/hotplug */
+ if (id->dev_type != 0)
+ len += snprintf(buf, size, "dt%04Xdm%02X%s", id->dev_type,
+ id->dev_model, suffix);
+ else
+ len += snprintf(buf, size, "dtdm%s", suffix);
- envp[i++] = buffer;
- length += scnprintf(buffer, buffer_size - length, "CU_TYPE=%04X",
- cdev->id.cu_type);
- if ((buffer_size - length <= 0) || (i >= num_envp))
- return -ENOMEM;
- ++length;
- buffer += length;
+ return len;
+}
+
+/* Set up environment variables for ccw device uevent. Return 0 on success,
+ * non-zero otherwise. */
+static int ccw_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+ struct ccw_device_id *id = &(cdev->id);
+ int i = 0;
+ int len;
+ /* 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;
- length += scnprintf(buffer, buffer_size - length, "CU_MODEL=%02X",
- cdev->id.cu_model);
- if ((buffer_size - length <= 0) || (i >= num_envp))
+ buffer += len;
+ buffer_size -= len;
+
+ /* CU_MODEL= */
+ len = snprintf(buffer, buffer_size, "CU_MODEL=%02X", id->cu_model) + 1;
+ if (len > buffer_size || i >= num_envp)
return -ENOMEM;
- ++length;
- buffer += length;
+ envp[i++] = buffer;
+ buffer += len;
+ buffer_size -= len;
/* The next two can be zero, that's ok for us */
- envp[i++] = buffer;
- length += scnprintf(buffer, buffer_size - length, "DEV_TYPE=%04X",
- cdev->id.dev_type);
- if ((buffer_size - length <= 0) || (i >= num_envp))
+ /* DEV_TYPE= */
+ len = snprintf(buffer, buffer_size, "DEV_TYPE=%04X", id->dev_type) + 1;
+ if (len > buffer_size || i >= num_envp)
return -ENOMEM;
- ++length;
- buffer += length;
+ envp[i++] = buffer;
+ buffer += len;
+ buffer_size -= len;
+ /* 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;
- length += scnprintf(buffer, buffer_size - length, "DEV_MODEL=%02X",
- cdev->id.dev_model);
- if ((buffer_size - length <= 0) || (i >= num_envp))
+ buffer += len;
+ buffer_size -= len;
+
+ /* 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] = 0;
+ envp[i] = NULL;
return 0;
}
{
struct ccw_device *cdev = to_ccwdev(dev);
struct ccw_device_id *id = &(cdev->id);
- int ret;
+ int len;
- ret = sprintf(buf, "ccw:t%04Xm%02X",
- id->cu_type, id->cu_model);
- if (id->dev_type != 0)
- ret += sprintf(buf + ret, "dt%04Xdm%02X\n",
- id->dev_type, id->dev_model);
- else
- ret += sprintf(buf + ret, "dtdm\n");
- return ret;
+ len = snprint_alias(buf, PAGE_SIZE, "", id, "\n") + 1;
+
+ return len > PAGE_SIZE ? PAGE_SIZE : len;
}
static ssize_t
* 'throw away device'.
*/
sch = to_subchannel(cdev->dev.parent);
- device_unregister(&sch->dev);
+ css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
cio_modify(sch);
}
struct match_data {
- unsigned int devno;
- unsigned int ssid;
+ struct ccw_dev_id dev_id;
struct ccw_device * sibling;
};
static int
match_devno(struct device * dev, void * data)
{
- struct match_data * d = (struct match_data *)data;
+ struct match_data * d = data;
struct ccw_device * cdev;
cdev = to_ccwdev(dev);
if ((cdev->private->state == DEV_STATE_DISCONNECTED) &&
- (cdev->private->devno == d->devno) &&
- (cdev->private->ssid == d->ssid) &&
+ ccw_dev_id_is_equal(&cdev->private->dev_id, &d->dev_id) &&
(cdev != d->sibling)) {
cdev->private->state = DEV_STATE_NOT_OPER;
return 1;
return 0;
}
-static struct ccw_device *
-get_disc_ccwdev_by_devno(unsigned int devno, unsigned int ssid,
- struct ccw_device *sibling)
+static struct ccw_device * get_disc_ccwdev_by_dev_id(struct ccw_dev_id *dev_id,
+ struct ccw_device *sibling)
{
struct device *dev;
- struct match_data data = {
- .devno = devno,
- .ssid = ssid,
- .sibling = sibling,
- };
+ struct match_data data;
+ data.dev_id = *dev_id;
+ data.sibling = sibling;
dev = bus_find_device(&ccw_bus_type, NULL, &data, match_devno);
return dev ? to_ccwdev(dev) : NULL;
struct ccw_device *cdev;
- cdev = (struct ccw_device *)data;
+ cdev = data;
if (device_add(&cdev->dev)) {
put_device(&cdev->dev);
return;
struct subchannel *sch;
int need_rename;
- cdev = (struct ccw_device *)data;
+ cdev = data;
sch = to_subchannel(cdev->dev.parent);
- if (cdev->private->devno != sch->schib.pmcw.dev) {
+ if (cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
/*
* The device number has changed. This is usually only when
* a device has been detached under VM and then re-appeared
* get possibly sick...
*/
struct ccw_device *other_cdev;
+ struct ccw_dev_id dev_id;
need_rename = 1;
- other_cdev = get_disc_ccwdev_by_devno(sch->schib.pmcw.dev,
- sch->schid.ssid, cdev);
+ dev_id.devno = sch->schib.pmcw.dev;
+ dev_id.ssid = sch->schid.ssid;
+ other_cdev = get_disc_ccwdev_by_dev_id(&dev_id, cdev);
if (other_cdev) {
struct subchannel *other_sch;
other_sch->schib.pmcw.intparm = 0;
cio_modify(other_sch);
}
- device_unregister(&other_sch->dev);
+ css_sch_device_unregister(other_sch);
}
}
/* Update ssd info here. */
css_get_ssd_info(sch);
- cdev->private->devno = sch->schib.pmcw.dev;
+ cdev->private->dev_id.devno = sch->schib.pmcw.dev;
} else
need_rename = 0;
device_remove_files(&cdev->dev);
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
sch->schid.ssid, sch->schib.pmcw.dev);
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_add_changed, (void *)cdev);
+ ccw_device_add_changed, cdev);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
int ret;
unsigned long flags;
- cdev = (struct ccw_device *) data;
+ cdev = data;
sch = to_subchannel(cdev->dev.parent);
if (klist_node_attached(&cdev->dev.knode_parent)) {
struct subchannel *sch;
sch = to_subchannel(cdev->dev.parent);
- device_unregister(&sch->dev);
+ css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
cio_modify(sch);
break;
sch = to_subchannel(cdev->dev.parent);
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister, (void *) cdev);
+ ccw_device_call_sch_unregister, cdev);
queue_work(slow_path_wq, &cdev->private->kick_work);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
if (!get_device(&cdev->dev))
break;
PREPARE_WORK(&cdev->private->kick_work,
- io_subchannel_register, (void *) cdev);
+ io_subchannel_register, cdev);
queue_work(slow_path_wq, &cdev->private->kick_work);
break;
}
/* Init private data. */
priv = cdev->private;
- priv->devno = sch->schib.pmcw.dev;
- priv->ssid = sch->schid.ssid;
- priv->sch_no = sch->schid.sch_no;
+ priv->dev_id.devno = sch->schib.pmcw.dev;
+ priv->dev_id.ssid = sch->schid.ssid;
+ priv->schid = sch->schid;
priv->state = DEV_STATE_NOT_OPER;
INIT_LIST_HEAD(&priv->cmb_list);
init_waitqueue_head(&priv->wait_q);
return -ENOMEM;
}
atomic_set(&cdev->private->onoff, 0);
- cdev->dev = (struct device) {
- .parent = &sch->dev,
- .release = ccw_device_release,
- };
+ cdev->dev.parent = &sch->dev;
+ cdev->dev.release = ccw_device_release;
INIT_LIST_HEAD(&cdev->private->kick_work.entry);
/* Do first half of device_register. */
device_initialize(&cdev->dev);
*/
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_unregister, (void *) cdev);
+ ccw_device_unregister, cdev);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
return 0;
int rc;
/* Initialize the ccw_device structure. */
- cdev->dev = (struct device) {
- .parent = &sch->dev,
- };
+ cdev->dev.parent= &sch->dev;
rc = io_subchannel_recog(cdev, sch);
if (rc)
return rc;
{
char *bus_id;
- bus_id = (char *)id;
+ bus_id = id;
return (strncmp(bus_id, dev->bus_id, BUS_ID_SIZE) == 0);
}
__ccwdev_check_busid);
put_driver(drv);
- return dev ? to_ccwdev(dev) : 0;
+ return dev ? to_ccwdev(dev) : NULL;
}
/************************** device driver handling ************************/
ret = cdrv->probe ? cdrv->probe(cdev) : -ENODEV;
if (ret) {
- cdev->drv = 0;
+ cdev->drv = NULL;
return ret;
}
ret, cdev->dev.bus_id);
}
ccw_device_set_timeout(cdev, 0);
- cdev->drv = 0;
+ cdev->drv = NULL;
return 0;
}
git.openpandora.org / pandora-kernel.git / blobdiff