/*
* drivers/s390/cio/device.c
* bus driver for ccw devices
- * $Revision: 1.131 $
*
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
* Author(s): Arnd Bergmann (arndb@de.ibm.com)
- * Cornelia Huck (cohuck@de.ibm.com)
+ * Cornelia Huck (cornelia.huck@de.ibm.com)
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#include <linux/config.h>
#include <asm/ccwdev.h>
#include <asm/cio.h>
+#include <asm/param.h> /* HZ */
#include "cio.h"
#include "css.h"
* Heavily modeled on pci and usb hotplug.
*/
static int
-ccw_hotplug (struct device *dev, char **envp, int num_envp,
+ccw_uevent (struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
{
struct ccw_device *cdev = to_ccwdev(dev);
return 0;
}
-struct bus_type ccw_bus_type = {
- .name = "ccw",
- .match = &ccw_bus_match,
- .hotplug = &ccw_hotplug,
-};
+struct bus_type ccw_bus_type;
-static int io_subchannel_probe (struct device *);
-static int io_subchannel_remove (struct device *);
+static int io_subchannel_probe (struct subchannel *);
+static int io_subchannel_remove (struct subchannel *);
void io_subchannel_irq (struct device *);
static int io_subchannel_notify(struct device *, int);
static void io_subchannel_verify(struct device *);
static void io_subchannel_ioterm(struct device *);
-static void io_subchannel_shutdown(struct device *);
+static void io_subchannel_shutdown(struct subchannel *);
struct css_driver io_subchannel_driver = {
.subchannel_type = SUBCHANNEL_TYPE_IO,
.drv = {
.name = "io_subchannel",
.bus = &css_bus_type,
- .probe = &io_subchannel_probe,
- .remove = &io_subchannel_remove,
- .shutdown = &io_subchannel_shutdown,
},
.irq = io_subchannel_irq,
.notify = io_subchannel_notify,
.verify = io_subchannel_verify,
.termination = io_subchannel_ioterm,
+ .probe = io_subchannel_probe,
+ .remove = io_subchannel_remove,
+ .shutdown = io_subchannel_shutdown,
};
struct workqueue_struct *ccw_device_work;
* TODO: Split chpids and pimpampom up? Where is "in use" in the tree?
*/
static ssize_t
-chpids_show (struct device * dev, char * buf)
+chpids_show (struct device * dev, struct device_attribute *attr, char * buf)
{
struct subchannel *sch = to_subchannel(dev);
struct ssd_info *ssd = &sch->ssd_info;
}
static ssize_t
-pimpampom_show (struct device * dev, char * buf)
+pimpampom_show (struct device * dev, struct device_attribute *attr, char * buf)
{
struct subchannel *sch = to_subchannel(dev);
struct pmcw *pmcw = &sch->schib.pmcw;
}
static ssize_t
-devtype_show (struct device *dev, char *buf)
+devtype_show (struct device *dev, struct device_attribute *attr, char *buf)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct ccw_device_id *id = &(cdev->id);
}
static ssize_t
-cutype_show (struct device *dev, char *buf)
+cutype_show (struct device *dev, struct device_attribute *attr, char *buf)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct ccw_device_id *id = &(cdev->id);
}
static ssize_t
-online_show (struct device *dev, char *buf)
+modalias_show (struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct ccw_device *cdev = to_ccwdev(dev);
+ struct ccw_device_id *id = &(cdev->id);
+ int ret;
+
+ 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;
+}
+
+static ssize_t
+online_show (struct device *dev, struct device_attribute *attr, char *buf)
{
struct ccw_device *cdev = to_ccwdev(dev);
else
pr_debug("ccw_device_offline returned %d, device %s\n",
ret, cdev->dev.bus_id);
- return (ret = 0) ? -ENODEV : ret;
+ return (ret == 0) ? -ENODEV : ret;
}
static ssize_t
-online_store (struct device *dev, const char *buf, size_t count)
+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;
char *tmp;
- if (atomic_compare_and_swap(0, 1, &cdev->private->onoff))
+ if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
return -EAGAIN;
if (cdev->drv && !try_module_get(cdev->drv->owner)) {
}
static ssize_t
-available_show (struct device *dev, char *buf)
+available_show (struct device *dev, struct device_attribute *attr, char *buf)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch;
static DEVICE_ATTR(pimpampom, 0444, pimpampom_show, NULL);
static DEVICE_ATTR(devtype, 0444, devtype_show, NULL);
static DEVICE_ATTR(cutype, 0444, cutype_show, NULL);
+static DEVICE_ATTR(modalias, 0444, modalias_show, NULL);
static DEVICE_ATTR(online, 0644, online_show, online_store);
extern struct device_attribute dev_attr_cmb_enable;
static DEVICE_ATTR(availability, 0444, available_show, NULL);
static struct attribute * ccwdev_attrs[] = {
&dev_attr_devtype.attr,
&dev_attr_cutype.attr,
+ &dev_attr_modalias.attr,
&dev_attr_online.attr,
&dev_attr_cmb_enable.attr,
&dev_attr_availability.attr,
return ret;
}
+struct match_data {
+ unsigned int devno;
+ unsigned int ssid;
+ struct ccw_device * sibling;
+};
+
+static int
+match_devno(struct device * dev, void * data)
+{
+ struct match_data * d = (struct match_data *)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) &&
+ (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, struct ccw_device *sibling)
+get_disc_ccwdev_by_devno(unsigned int devno, unsigned int ssid,
+ struct ccw_device *sibling)
{
- struct ccw_device *cdev;
- struct list_head *entry;
struct device *dev;
+ struct match_data data = {
+ .devno = devno,
+ .ssid = ssid,
+ .sibling = sibling,
+ };
- if (!get_bus(&ccw_bus_type))
- return NULL;
- down_read(&ccw_bus_type.subsys.rwsem);
- cdev = NULL;
- list_for_each(entry, &ccw_bus_type.devices.list) {
- dev = get_device(container_of(entry,
- struct device, bus_list));
- if (!dev)
- continue;
- cdev = to_ccwdev(dev);
- if ((cdev->private->state == DEV_STATE_DISCONNECTED) &&
- (cdev->private->devno == devno) &&
- (cdev != sibling)) {
- cdev->private->state = DEV_STATE_NOT_OPER;
- break;
- }
- put_device(dev);
- cdev = NULL;
- }
- up_read(&ccw_bus_type.subsys.rwsem);
- put_bus(&ccw_bus_type);
+ dev = bus_find_device(&ccw_bus_type, NULL, &data, match_devno);
- return cdev;
+ return dev ? to_ccwdev(dev) : NULL;
}
static void
need_rename = 1;
other_cdev = get_disc_ccwdev_by_devno(sch->schib.pmcw.dev,
- cdev);
+ sch->schid.ssid, cdev);
if (other_cdev) {
struct subchannel *other_sch;
other_sch = to_subchannel(other_cdev->dev.parent);
if (get_device(&other_sch->dev)) {
- stsch(other_sch->irq, &other_sch->schib);
+ stsch(other_sch->schid, &other_sch->schib);
if (other_sch->schib.pmcw.dnv) {
other_sch->schib.pmcw.intparm = 0;
cio_modify(other_sch);
if (test_and_clear_bit(1, &cdev->private->registered))
device_del(&cdev->dev);
if (need_rename)
- snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.0.%04x",
- sch->schib.pmcw.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);
queue_work(ccw_device_work, &cdev->private->kick_work);
cdev = (struct ccw_device *) data;
sch = to_subchannel(cdev->dev.parent);
- if (!list_empty(&sch->dev.children)) {
+ if (klist_node_attached(&cdev->dev.knode_parent)) {
bus_rescan_devices(&ccw_bus_type);
goto out;
}
sch->dev.driver_data = cdev;
sch->driver = &io_subchannel_driver;
cdev->ccwlock = &sch->lock;
+
/* Init private data. */
priv = cdev->private;
priv->devno = sch->schib.pmcw.dev;
- priv->irq = sch->irq;
+ priv->ssid = sch->schid.ssid;
+ priv->sch_no = sch->schid.sch_no;
priv->state = DEV_STATE_NOT_OPER;
INIT_LIST_HEAD(&priv->cmb_list);
init_waitqueue_head(&priv->wait_q);
init_timer(&priv->timer);
/* Set an initial name for the device. */
- snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.0.%04x",
- sch->schib.pmcw.dev);
+ snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
+ sch->schid.ssid, sch->schib.pmcw.dev);
/* Increase counter of devices currently in recognition. */
atomic_inc(&ccw_device_init_count);
}
static int
-io_subchannel_probe (struct device *pdev)
+io_subchannel_probe (struct subchannel *sch)
{
- struct subchannel *sch;
struct ccw_device *cdev;
int rc;
unsigned long flags;
- sch = to_subchannel(pdev);
if (sch->dev.driver_data) {
/*
* This subchannel already has an associated ccw_device.
get_device(&cdev->dev);
return 0;
}
- cdev = kmalloc (sizeof(*cdev), GFP_KERNEL);
+ cdev = kzalloc (sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return -ENOMEM;
- memset(cdev, 0, sizeof(struct ccw_device));
- cdev->private = kmalloc(sizeof(struct ccw_device_private),
+ cdev->private = kzalloc(sizeof(struct ccw_device_private),
GFP_KERNEL | GFP_DMA);
if (!cdev->private) {
kfree(cdev);
return -ENOMEM;
}
- memset(cdev->private, 0, sizeof(struct ccw_device_private));
atomic_set(&cdev->private->onoff, 0);
cdev->dev = (struct device) {
- .parent = pdev,
+ .parent = &sch->dev,
.release = ccw_device_release,
};
INIT_LIST_HEAD(&cdev->private->kick_work.entry);
return -ENODEV;
}
- rc = io_subchannel_recog(cdev, to_subchannel(pdev));
+ rc = io_subchannel_recog(cdev, sch);
if (rc) {
spin_lock_irqsave(&sch->lock, flags);
sch->dev.driver_data = NULL;
}
static int
-io_subchannel_remove (struct device *dev)
+io_subchannel_remove (struct subchannel *sch)
{
struct ccw_device *cdev;
unsigned long flags;
- if (!dev->driver_data)
+ if (!sch->dev.driver_data)
return 0;
- cdev = dev->driver_data;
+ cdev = sch->dev.driver_data;
/* Set ccw device to not operational and drop reference. */
spin_lock_irqsave(cdev->ccwlock, flags);
- dev->driver_data = NULL;
+ sch->dev.driver_data = NULL;
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
/*
}
static void
-io_subchannel_shutdown(struct device *dev)
+io_subchannel_shutdown(struct subchannel *sch)
{
- struct subchannel *sch;
struct ccw_device *cdev;
int ret;
- sch = to_subchannel(dev);
- cdev = dev->driver_data;
+ cdev = sch->dev.driver_data;
- if (cio_is_console(sch->irq))
+ if (cio_is_console(sch->schid))
return;
if (!sch->schib.pmcw.ena)
/* Nothing to do. */
cdev->dev = (struct device) {
.parent = &sch->dev,
};
- /* Initialize the subchannel structure */
- sch->dev.parent = &css_bus_device;
- sch->dev.bus = &css_bus_type;
-
rc = io_subchannel_recog(cdev, sch);
if (rc)
return rc;
int ret;
if (xchg(&console_cdev_in_use, 1) != 0)
- return NULL;
+ return ERR_PTR(-EBUSY);
sch = cio_probe_console();
if (IS_ERR(sch)) {
console_cdev_in_use = 0;
/*
* get ccw_device matching the busid, but only if owned by cdrv
*/
+static int
+__ccwdev_check_busid(struct device *dev, void *id)
+{
+ char *bus_id;
+
+ bus_id = (char *)id;
+
+ return (strncmp(bus_id, dev->bus_id, BUS_ID_SIZE) == 0);
+}
+
+
struct ccw_device *
get_ccwdev_by_busid(struct ccw_driver *cdrv, const char *bus_id)
{
- struct device *d, *dev;
+ struct device *dev;
struct device_driver *drv;
drv = get_driver(&cdrv->driver);
if (!drv)
- return 0;
-
- down_read(&drv->bus->subsys.rwsem);
-
- dev = NULL;
- list_for_each_entry(d, &drv->devices, driver_list) {
- dev = get_device(d);
+ return NULL;
- if (dev && !strncmp(bus_id, dev->bus_id, BUS_ID_SIZE))
- break;
- else if (dev) {
- put_device(dev);
- dev = NULL;
- }
- }
- up_read(&drv->bus->subsys.rwsem);
+ dev = driver_find_device(drv, NULL, (void *)bus_id,
+ __ccwdev_check_busid);
put_driver(drv);
return dev ? to_ccwdev(dev) : 0;
return 0;
}
+struct bus_type ccw_bus_type = {
+ .name = "ccw",
+ .match = ccw_bus_match,
+ .uevent = ccw_uevent,
+ .probe = ccw_device_probe,
+ .remove = ccw_device_remove,
+};
+
int
ccw_driver_register (struct ccw_driver *cdriver)
{
drv->bus = &ccw_bus_type;
drv->name = cdriver->name;
- drv->probe = ccw_device_probe;
- drv->remove = ccw_device_remove;
return driver_register(drv);
}
driver_unregister(&cdriver->driver);
}
+/* Helper func for qdio. */
+struct subchannel_id
+ccw_device_get_subchannel_id(struct ccw_device *cdev)
+{
+ struct subchannel *sch;
+
+ sch = to_subchannel(cdev->dev.parent);
+ return sch->schid;
+}
+
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(ccw_device_set_online);
EXPORT_SYMBOL(ccw_device_set_offline);
EXPORT_SYMBOL(ccw_bus_type);
EXPORT_SYMBOL(ccw_device_work);
EXPORT_SYMBOL(ccw_device_notify_work);
+EXPORT_SYMBOL_GPL(ccw_device_get_subchannel_id);
git://git.onelab.eu / linux-2.6.git / blobdiff