<year>2006-2008</year>
<holder>Hans-Jürgen Koch.</holder>
</copyright>
+<copyright>
+ <year>2009</year>
+ <holder>Red Hat Inc, Michael S. Tsirkin (mst@redhat.com)</holder>
+</copyright>
<legalnotice>
<para>
<revhistory>
<revision>
+ <revnumber>0.9</revnumber>
+ <date>2009-07-16</date>
+ <authorinitials>mst</authorinitials>
+ <revremark>Added generic pci driver
+ </revremark>
+ </revision>
+ <revision>
<revnumber>0.8</revnumber>
<date>2008-12-24</date>
<authorinitials>hjk</authorinitials>
</chapter>
+<chapter id="uio_pci_generic" xreflabel="Using Generic driver for PCI cards">
+<?dbhtml filename="uio_pci_generic.html"?>
+<title>Generic PCI UIO driver</title>
+ <para>
+ The generic driver is a kernel module named uio_pci_generic.
+ It can work with any device compliant to PCI 2.3 (circa 2002) and
+ any compliant PCI Express device. Using this, you only need to
+ write the userspace driver, removing the need to write
+ a hardware-specific kernel module.
+ </para>
+
+<sect1 id="uio_pci_generic_binding">
+<title>Making the driver recognize the device</title>
+ <para>
+Since the driver does not declare any device ids, it will not get loaded
+automatically and will not automatically bind to any devices, you must load it
+and allocate id to the driver yourself. For example:
+ <programlisting>
+ modprobe uio_pci_generic
+ echo "8086 10f5" > /sys/bus/pci/drivers/uio_pci_generic/new_id
+ </programlisting>
+ </para>
+ <para>
+If there already is a hardware specific kernel driver for your device, the
+generic driver still won't bind to it, in this case if you want to use the
+generic driver (why would you?) you'll have to manually unbind the hardware
+specific driver and bind the generic driver, like this:
+ <programlisting>
+ echo -n 0000:00:19.0 > /sys/bus/pci/drivers/e1000e/unbind
+ echo -n 0000:00:19.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
+ </programlisting>
+ </para>
+ <para>
+You can verify that the device has been bound to the driver
+by looking for it in sysfs, for example like the following:
+ <programlisting>
+ ls -l /sys/bus/pci/devices/0000:00:19.0/driver
+ </programlisting>
+Which if successful should print
+ <programlisting>
+ .../0000:00:19.0/driver -> ../../../bus/pci/drivers/uio_pci_generic
+ </programlisting>
+Note that the generic driver will not bind to old PCI 2.2 devices.
+If binding the device failed, run the following command:
+ <programlisting>
+ dmesg
+ </programlisting>
+and look in the output for failure reasons
+ </para>
+</sect1>
+
+<sect1 id="uio_pci_generic_internals">
+<title>Things to know about uio_pci_generic</title>
+ <para>
+Interrupts are handled using the Interrupt Disable bit in the PCI command
+register and Interrupt Status bit in the PCI status register. All devices
+compliant to PCI 2.3 (circa 2002) and all compliant PCI Express devices should
+support these bits. uio_pci_generic detects this support, and won't bind to
+devices which do not support the Interrupt Disable Bit in the command register.
+ </para>
+ <para>
+On each interrupt, uio_pci_generic sets the Interrupt Disable bit.
+This prevents the device from generating further interrupts
+until the bit is cleared. The userspace driver should clear this
+bit before blocking and waiting for more interrupts.
+ </para>
+</sect1>
+<sect1 id="uio_pci_generic_userspace">
+<title>Writing userspace driver using uio_pci_generic</title>
+ <para>
+Userspace driver can use pci sysfs interface, or the
+libpci libray that wraps it, to talk to the device and to
+re-enable interrupts by writing to the command register.
+ </para>
+</sect1>
+<sect1 id="uio_pci_generic_example">
+<title>Example code using uio_pci_generic</title>
+ <para>
+Here is some sample userspace driver code using uio_pci_generic:
+<programlisting>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+int main()
+{
+ int uiofd;
+ int configfd;
+ int err;
+ int i;
+ unsigned icount;
+ unsigned char command_high;
+
+ uiofd = open("/dev/uio0", O_RDONLY);
+ if (uiofd < 0) {
+ perror("uio open:");
+ return errno;
+ }
+ configfd = open("/sys/class/uio/uio0/device/config", O_RDWR);
+ if (uiofd < 0) {
+ perror("config open:");
+ return errno;
+ }
+
+ /* Read and cache command value */
+ err = pread(configfd, &command_high, 1, 5);
+ if (err != 1) {
+ perror("command config read:");
+ return errno;
+ }
+ command_high &= ~0x4;
+
+ for(i = 0;; ++i) {
+ /* Print out a message, for debugging. */
+ if (i == 0)
+ fprintf(stderr, "Started uio test driver.\n");
+ else
+ fprintf(stderr, "Interrupts: %d\n", icount);
+
+ /****************************************/
+ /* Here we got an interrupt from the
+ device. Do something to it. */
+ /****************************************/
+
+ /* Re-enable interrupts. */
+ err = pwrite(configfd, &command_high, 1, 5);
+ if (err != 1) {
+ perror("config write:");
+ break;
+ }
+
+ /* Wait for next interrupt. */
+ err = read(uiofd, &icount, 4);
+ if (err != 4) {
+ perror("uio read:");
+ break;
+ }
+
+ }
+ return errno;
+}
+
+</programlisting>
+ </para>
+</sect1>
+
+</chapter>
+
<appendix id="app1">
<title>Further information</title>
<itemizedlist>
---------------------------------
The events which are available for tracing can be found in the file
-/debug/tracing/available_events.
+/sys/kernel/debug/tracing/available_events.
To enable a particular event, such as 'sched_wakeup', simply echo it
-to /debug/tracing/set_event. For example:
+to /sys/kernel/debug/tracing/set_event. For example:
- # echo sched_wakeup >> /debug/tracing/set_event
+ # echo sched_wakeup >> /sys/kernel/debug/tracing/set_event
[ Note: '>>' is necessary, otherwise it will firstly disable
all the events. ]
To disable an event, echo the event name to the set_event file prefixed
with an exclamation point:
- # echo '!sched_wakeup' >> /debug/tracing/set_event
+ # echo '!sched_wakeup' >> /sys/kernel/debug/tracing/set_event
To disable all events, echo an empty line to the set_event file:
- # echo > /debug/tracing/set_event
+ # echo > /sys/kernel/debug/tracing/set_event
To enable all events, echo '*:*' or '*:' to the set_event file:
- # echo *:* > /debug/tracing/set_event
+ # echo *:* > /sys/kernel/debug/tracing/set_event
The events are organized into subsystems, such as ext4, irq, sched,
etc., and a full event name looks like this: <subsystem>:<event>. The
"<subsystem>:*"; for example, to enable all irq events, you can use the
command:
- # echo 'irq:*' > /debug/tracing/set_event
+ # echo 'irq:*' > /sys/kernel/debug/tracing/set_event
2.2 Via the 'enable' toggle
---------------------------
-The events available are also listed in /debug/tracing/events/ hierarchy
+The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy
of directories.
To enable event 'sched_wakeup':
- # echo 1 > /debug/tracing/events/sched/sched_wakeup/enable
+ # echo 1 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
To disable it:
- # echo 0 > /debug/tracing/events/sched/sched_wakeup/enable
+ # echo 0 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
To enable all events in sched subsystem:
- # echo 1 > /debug/tracing/events/sched/enable
+ # echo 1 > /sys/kernel/debug/tracing/events/sched/enable
To eanble all events:
- # echo 1 > /debug/tracing/events/enable
+ # echo 1 > /sys/kernel/debug/tracing/events/enable
When reading one of these enable files, there are four results:
S: Maintained
F: include/asm-generic
+GENERIC UIO DRIVER FOR PCI DEVICES
+M: Michael S. Tsirkin <mst@redhat.com>
+L: kvm@vger.kernel.org
+L: linux-kernel@vger.kernel.org
+S: Supported
+F: drivers/uio/uio_pci_generic.c
+
GFS2 FILE SYSTEM
M: Steven Whitehouse <swhiteho@redhat.com>
L: cluster-devel@redhat.com
.attrs = disk_attrs,
};
-static struct attribute_group *disk_attr_groups[] = {
+static const struct attribute_group *disk_attr_groups[] = {
&disk_attr_group,
NULL
};
Path to uevent helper program forked by the kernel for
every uevent.
+config DEVTMPFS
+ bool "Create a kernel maintained /dev tmpfs (EXPERIMENTAL)"
+ depends on HOTPLUG && SHMEM && TMPFS
+ help
+ This creates a tmpfs filesystem, and mounts it at bootup
+ and mounts it at /dev. The kernel driver core creates device
+ nodes for all registered devices in that filesystem. All device
+ nodes are owned by root and have the default mode of 0600.
+ Userspace can add and delete the nodes as needed. This is
+ intended to simplify bootup, and make it possible to delay
+ the initial coldplug at bootup done by udev in userspace.
+ It should also provide a simpler way for rescue systems
+ to bring up a kernel with dynamic major/minor numbers.
+ Meaningful symlinks, permissions and device ownership must
+ still be handled by userspace.
+ If unsure, say N here.
+
+config DEVTMPFS_MOUNT
+ bool "Automount devtmpfs at /dev"
+ depends on DEVTMPFS
+ help
+ This will mount devtmpfs at /dev if the kernel mounts the root
+ filesystem. It will not affect initramfs based mounting.
+ If unsure, say N here.
+
config STANDALONE
bool "Select only drivers that don't need compile-time external firmware" if EXPERIMENTAL
default y
driver.o class.o platform.o \
cpu.o firmware.o init.o map.o devres.o \
attribute_container.o transport_class.o
+obj-$(CONFIG_DEVTMPFS) += devtmpfs.o
obj-y += power/
obj-$(CONFIG_HAS_DMA) += dma-mapping.o
+obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
obj-$(CONFIG_ISA) += isa.o
obj-$(CONFIG_FW_LOADER) += firmware_class.o
obj-$(CONFIG_NUMA) += node.o
* @knode_parent - node in sibling list
* @knode_driver - node in driver list
* @knode_bus - node in bus list
+ * @driver_data - private pointer for driver specific info. Will turn into a
+ * list soon.
* @device - pointer back to the struct class that this structure is
* associated with.
*
struct klist_node knode_parent;
struct klist_node knode_driver;
struct klist_node knode_bus;
+ void *driver_data;
struct device *device;
};
#define to_device_private_parent(obj) \
#define to_device_private_bus(obj) \
container_of(obj, struct device_private, knode_bus)
+extern int device_private_init(struct device *dev);
+
/* initialisation functions */
extern int devices_init(void);
extern int buses_init(void);
extern int cpu_dev_init(void);
extern int bus_add_device(struct device *dev);
-extern void bus_attach_device(struct device *dev);
+extern void bus_probe_device(struct device *dev);
extern void bus_remove_device(struct device *dev);
extern int bus_add_driver(struct device_driver *drv);
struct device_driver *drv) { }
static inline void module_remove_driver(struct device_driver *drv) { }
#endif
+
+#ifdef CONFIG_DEVTMPFS
+extern int devtmpfs_init(void);
+#else
+static inline int devtmpfs_init(void) { return 0; }
+#endif
* bus_add_device - add device to bus
* @dev: device being added
*
+ * - Add device's bus attributes.
+ * - Create links to device's bus.
* - Add the device to its bus's list of devices.
- * - Create link to device's bus.
*/
int bus_add_device(struct device *dev)
{
error = make_deprecated_bus_links(dev);
if (error)
goto out_deprecated;
+ klist_add_tail(&dev->p->knode_bus, &bus->p->klist_devices);
}
return 0;
}
/**
- * bus_attach_device - add device to bus
- * @dev: device tried to attach to a driver
+ * bus_probe_device - probe drivers for a new device
+ * @dev: device to probe
*
- * - Add device to bus's list of devices.
- * - Try to attach to driver.
+ * - Automatically probe for a driver if the bus allows it.
*/
-void bus_attach_device(struct device *dev)
+void bus_probe_device(struct device *dev)
{
struct bus_type *bus = dev->bus;
- int ret = 0;
+ int ret;
- if (bus) {
- if (bus->p->drivers_autoprobe)
- ret = device_attach(dev);
+ if (bus && bus->p->drivers_autoprobe) {
+ ret = device_attach(dev);
WARN_ON(ret < 0);
- if (ret >= 0)
- klist_add_tail(&dev->p->knode_bus,
- &bus->p->klist_devices);
}
}
class_put(parent);
}
+struct class_compat {
+ struct kobject *kobj;
+};
+
+/**
+ * class_compat_register - register a compatibility class
+ * @name: the name of the class
+ *
+ * Compatibility class are meant as a temporary user-space compatibility
+ * workaround when converting a family of class devices to a bus devices.
+ */
+struct class_compat *class_compat_register(const char *name)
+{
+ struct class_compat *cls;
+
+ cls = kmalloc(sizeof(struct class_compat), GFP_KERNEL);
+ if (!cls)
+ return NULL;
+ cls->kobj = kobject_create_and_add(name, &class_kset->kobj);
+ if (!cls->kobj) {
+ kfree(cls);
+ return NULL;
+ }
+ return cls;
+}
+EXPORT_SYMBOL_GPL(class_compat_register);
+
+/**
+ * class_compat_unregister - unregister a compatibility class
+ * @cls: the class to unregister
+ */
+void class_compat_unregister(struct class_compat *cls)
+{
+ kobject_put(cls->kobj);
+ kfree(cls);
+}
+EXPORT_SYMBOL_GPL(class_compat_unregister);
+
+/**
+ * class_compat_create_link - create a compatibility class device link to
+ * a bus device
+ * @cls: the compatibility class
+ * @dev: the target bus device
+ * @device_link: an optional device to which a "device" link should be created
+ */
+int class_compat_create_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link)
+{
+ int error;
+
+ error = sysfs_create_link(cls->kobj, &dev->kobj, dev_name(dev));
+ if (error)
+ return error;
+
+ /*
+ * Optionally add a "device" link (typically to the parent), as a
+ * class device would have one and we want to provide as much
+ * backwards compatibility as possible.
+ */
+ if (device_link) {
+ error = sysfs_create_link(&dev->kobj, &device_link->kobj,
+ "device");
+ if (error)
+ sysfs_remove_link(cls->kobj, dev_name(dev));
+ }
+
+ return error;
+}
+EXPORT_SYMBOL_GPL(class_compat_create_link);
+
+/**
+ * class_compat_remove_link - remove a compatibility class device link to
+ * a bus device
+ * @cls: the compatibility class
+ * @dev: the target bus device
+ * @device_link: an optional device to which a "device" link was previously
+ * created
+ */
+void class_compat_remove_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link)
+{
+ if (device_link)
+ sysfs_remove_link(&dev->kobj, "device");
+ sysfs_remove_link(cls->kobj, dev_name(dev));
+}
+EXPORT_SYMBOL_GPL(class_compat_remove_link);
+
int __init classes_init(void)
{
class_kset = kset_create_and_add("class", NULL, NULL);
}
static int device_add_groups(struct device *dev,
- struct attribute_group **groups)
+ const struct attribute_group **groups)
{
int error = 0;
int i;
}
static void device_remove_groups(struct device *dev,
- struct attribute_group **groups)
+ const struct attribute_group **groups)
{
int i;
}
}
+int device_private_init(struct device *dev)
+{
+ dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
+ if (!dev->p)
+ return -ENOMEM;
+ dev->p->device = dev;
+ klist_init(&dev->p->klist_children, klist_children_get,
+ klist_children_put);
+ return 0;
+}
+
/**
* device_add - add device to device hierarchy.
* @dev: device.
if (!dev)
goto done;
- dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
if (!dev->p) {
- error = -ENOMEM;
- goto done;
+ error = device_private_init(dev);
+ if (error)
+ goto done;
}
- dev->p->device = dev;
- klist_init(&dev->p->klist_children, klist_children_get,
- klist_children_put);
/*
* for statically allocated devices, which should all be converted
error = device_create_sys_dev_entry(dev);
if (error)
goto devtattrError;
+
+ devtmpfs_create_node(dev);
}
error = device_add_class_symlinks(dev);
BUS_NOTIFY_ADD_DEVICE, dev);
kobject_uevent(&dev->kobj, KOBJ_ADD);
- bus_attach_device(dev);
+ bus_probe_device(dev);
if (parent)
klist_add_tail(&dev->p->knode_parent,
&parent->p->klist_children);
if (parent)
klist_del(&dev->p->knode_parent);
if (MAJOR(dev->devt)) {
+ devtmpfs_delete_node(dev);
device_remove_sys_dev_entry(dev);
device_remove_file(dev, &devt_attr);
}
*
* Copyright (c) 2002-5 Patrick Mochel
* Copyright (c) 2002-3 Open Source Development Labs
- * Copyright (c) 2007 Greg Kroah-Hartman <gregkh@suse.de>
- * Copyright (c) 2007 Novell Inc.
+ * Copyright (c) 2007-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2007-2009 Novell Inc.
*
* This file is released under the GPLv2
*/
put_device(dev);
}
}
+
+/*
+ * These exports can't be _GPL due to .h files using this within them, and it
+ * might break something that was previously working...
+ */
+void *dev_get_drvdata(const struct device *dev)
+{
+ if (dev && dev->p)
+ return dev->p->driver_data;
+ return NULL;
+}
+EXPORT_SYMBOL(dev_get_drvdata);
+
+void dev_set_drvdata(struct device *dev, void *data)
+{
+ int error;
+
+ if (!dev)
+ return;
+ if (!dev->p) {
+ error = device_private_init(dev);
+ if (error)
+ return;
+ }
+ dev->p->driver_data = data;
+}
+EXPORT_SYMBOL(dev_set_drvdata);
--- /dev/null
+/*
+ * devtmpfs - kernel-maintained tmpfs-based /dev
+ *
+ * Copyright (C) 2009, Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * During bootup, before any driver core device is registered,
+ * devtmpfs, a tmpfs-based filesystem is created. Every driver-core
+ * device which requests a device node, will add a node in this
+ * filesystem. The node is named after the the name of the device,
+ * or the susbsytem can provide a custom name. All devices are
+ * owned by root and have a mode of 0600.
+ */
+
+#include <linux/kernel.h>
+#include <linux/syscalls.h>
+#include <linux/mount.h>
+#include <linux/device.h>
+#include <linux/genhd.h>
+#include <linux/namei.h>
+#include <linux/fs.h>
+#include <linux/shmem_fs.h>
+#include <linux/cred.h>
+#include <linux/init_task.h>
+
+static struct vfsmount *dev_mnt;
+
+#if defined CONFIG_DEVTMPFS_MOUNT
+static int dev_mount = 1;
+#else
+static int dev_mount;
+#endif
+
+static int __init mount_param(char *str)
+{
+ dev_mount = simple_strtoul(str, NULL, 0);
+ return 1;
+}
+__setup("devtmpfs.mount=", mount_param);
+
+static int dev_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data, struct vfsmount *mnt)
+{
+ return get_sb_single(fs_type, flags, data, shmem_fill_super, mnt);
+}
+
+static struct file_system_type dev_fs_type = {
+ .name = "devtmpfs",
+ .get_sb = dev_get_sb,
+ .kill_sb = kill_litter_super,
+};
+
+#ifdef CONFIG_BLOCK
+static inline int is_blockdev(struct device *dev)
+{
+ return dev->class == &block_class;
+}
+#else
+static inline int is_blockdev(struct device *dev) { return 0; }
+#endif
+
+static int dev_mkdir(const char *name, mode_t mode)
+{
+ struct nameidata nd;
+ struct dentry *dentry;
+ int err;
+
+ err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
+ name, LOOKUP_PARENT, &nd);
+ if (err)
+ return err;
+
+ dentry = lookup_create(&nd, 1);
+ if (!IS_ERR(dentry)) {
+ err = vfs_mkdir(nd.path.dentry->d_inode, dentry, mode);
+ dput(dentry);
+ } else {
+ err = PTR_ERR(dentry);
+ }
+ mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+
+ path_put(&nd.path);
+ return err;
+}
+
+static int create_path(const char *nodepath)
+{
+ char *path;
+ struct nameidata nd;
+ int err = 0;
+
+ path = kstrdup(nodepath, GFP_KERNEL);
+ if (!path)
+ return -ENOMEM;
+
+ err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
+ path, LOOKUP_PARENT, &nd);
+ if (err == 0) {
+ struct dentry *dentry;
+
+ /* create directory right away */
+ dentry = lookup_create(&nd, 1);
+ if (!IS_ERR(dentry)) {
+ err = vfs_mkdir(nd.path.dentry->d_inode,
+ dentry, 0755);
+ dput(dentry);
+ }
+ mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+
+ path_put(&nd.path);
+ } else if (err == -ENOENT) {
+ char *s;
+
+ /* parent directories do not exist, create them */
+ s = path;
+ while (1) {
+ s = strchr(s, '/');
+ if (!s)
+ break;
+ s[0] = '\0';
+ err = dev_mkdir(path, 0755);
+ if (err && err != -EEXIST)
+ break;
+ s[0] = '/';
+ s++;
+ }
+ }
+
+ kfree(path);
+ return err;
+}
+
+int devtmpfs_create_node(struct device *dev)
+{
+ const char *tmp = NULL;
+ const char *nodename;
+ const struct cred *curr_cred;
+ mode_t mode;
+ struct nameidata nd;
+ struct dentry *dentry;
+ int err;
+
+ if (!dev_mnt)
+ return 0;
+
+ nodename = device_get_nodename(dev, &tmp);
+ if (!nodename)
+ return -ENOMEM;
+
+ if (is_blockdev(dev))
+ mode = S_IFBLK|0600;
+ else
+ mode = S_IFCHR|0600;
+
+ curr_cred = override_creds(&init_cred);
+ err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
+ nodename, LOOKUP_PARENT, &nd);
+ if (err == -ENOENT) {
+ /* create missing parent directories */
+ create_path(nodename);
+ err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
+ nodename, LOOKUP_PARENT, &nd);
+ if (err)
+ goto out;
+ }
+
+ dentry = lookup_create(&nd, 0);
+ if (!IS_ERR(dentry)) {
+ err = vfs_mknod(nd.path.dentry->d_inode,
+ dentry, mode, dev->devt);
+ /* mark as kernel created inode */
+ if (!err)
+ dentry->d_inode->i_private = &dev_mnt;
+ dput(dentry);
+ } else {
+ err = PTR_ERR(dentry);
+ }
+ mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+
+ path_put(&nd.path);
+out:
+ kfree(tmp);
+ revert_creds(curr_cred);
+ return err;
+}
+
+static int dev_rmdir(const char *name)
+{
+ struct nameidata nd;
+ struct dentry *dentry;
+ int err;
+
+ err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
+ name, LOOKUP_PARENT, &nd);
+ if (err)
+ return err;
+
+ mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
+ dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
+ if (!IS_ERR(dentry)) {
+ if (dentry->d_inode)
+ err = vfs_rmdir(nd.path.dentry->d_inode, dentry);
+ else
+ err = -ENOENT;
+ dput(dentry);
+ } else {
+ err = PTR_ERR(dentry);
+ }
+ mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+
+ path_put(&nd.path);
+ return err;
+}
+
+static int delete_path(const char *nodepath)
+{
+ const char *path;
+ int err = 0;
+
+ path = kstrdup(nodepath, GFP_KERNEL);
+ if (!path)
+ return -ENOMEM;
+
+ while (1) {
+ char *base;
+
+ base = strrchr(path, '/');
+ if (!base)
+ break;
+ base[0] = '\0';
+ err = dev_rmdir(path);
+ if (err)
+ break;
+ }
+
+ kfree(path);
+ return err;
+}
+
+static int dev_mynode(struct device *dev, struct inode *inode, struct kstat *stat)
+{
+ /* did we create it */
+ if (inode->i_private != &dev_mnt)
+ return 0;
+
+ /* does the dev_t match */
+ if (is_blockdev(dev)) {
+ if (!S_ISBLK(stat->mode))
+ return 0;
+ } else {
+ if (!S_ISCHR(stat->mode))
+ return 0;
+ }
+ if (stat->rdev != dev->devt)
+ return 0;
+
+ /* ours */
+ return 1;
+}
+
+int devtmpfs_delete_node(struct device *dev)
+{
+ const char *tmp = NULL;
+ const char *nodename;
+ const struct cred *curr_cred;
+ struct nameidata nd;
+ struct dentry *dentry;
+ struct kstat stat;
+ int deleted = 1;
+ int err;
+
+ if (!dev_mnt)
+ return 0;
+
+ nodename = device_get_nodename(dev, &tmp);
+ if (!nodename)
+ return -ENOMEM;
+
+ curr_cred = override_creds(&init_cred);
+ err = vfs_path_lookup(dev_mnt->mnt_root, dev_mnt,
+ nodename, LOOKUP_PARENT, &nd);
+ if (err)
+ goto out;
+
+ mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
+ dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
+ if (!IS_ERR(dentry)) {
+ if (dentry->d_inode) {
+ err = vfs_getattr(nd.path.mnt, dentry, &stat);
+ if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
+ err = vfs_unlink(nd.path.dentry->d_inode,
+ dentry);
+ if (!err || err == -ENOENT)
+ deleted = 1;
+ }
+ } else {
+ err = -ENOENT;
+ }
+ dput(dentry);
+ } else {
+ err = PTR_ERR(dentry);
+ }
+ mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+
+ path_put(&nd.path);
+ if (deleted && strchr(nodename, '/'))
+ delete_path(nodename);
+out:
+ kfree(tmp);
+ revert_creds(curr_cred);
+ return err;
+}
+
+/*
+ * If configured, or requested by the commandline, devtmpfs will be
+ * auto-mounted after the kernel mounted the root filesystem.
+ */
+int devtmpfs_mount(const char *mountpoint)
+{
+ struct path path;
+ int err;
+
+ if (!dev_mount)
+ return 0;
+
+ if (!dev_mnt)
+ return 0;
+
+ err = kern_path(mountpoint, LOOKUP_FOLLOW, &path);
+ if (err)
+ return err;
+ err = do_add_mount(dev_mnt, &path, 0, NULL);
+ if (err)
+ printk(KERN_INFO "devtmpfs: error mounting %i\n", err);
+ else
+ printk(KERN_INFO "devtmpfs: mounted\n");
+ path_put(&path);
+ return err;
+}
+
+/*
+ * Create devtmpfs instance, driver-core devices will add their device
+ * nodes here.
+ */
+int __init devtmpfs_init(void)
+{
+ int err;
+ struct vfsmount *mnt;
+
+ err = register_filesystem(&dev_fs_type);
+ if (err) {
+ printk(KERN_ERR "devtmpfs: unable to register devtmpfs "
+ "type %i\n", err);
+ return err;
+ }
+
+ mnt = kern_mount(&dev_fs_type);
+ if (IS_ERR(mnt)) {
+ err = PTR_ERR(mnt);
+ printk(KERN_ERR "devtmpfs: unable to create devtmpfs %i\n", err);
+ unregister_filesystem(&dev_fs_type);
+ return err;
+ }
+ dev_mnt = mnt;
+
+ printk(KERN_INFO "devtmpfs: initialized\n");
+ return 0;
+}
EXPORT_SYMBOL_GPL(put_driver);
static int driver_add_groups(struct device_driver *drv,
- struct attribute_group **groups)
+ const struct attribute_group **groups)
{
int error = 0;
int i;
}
static void driver_remove_groups(struct device_driver *drv,
- struct attribute_group **groups)
+ const struct attribute_group **groups)
{
int i;
void __init driver_init(void)
{
/* These are the core pieces */
+ devtmpfs_init();
devices_init();
buses_init();
classes_init();
* information.
*/
+#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/init.h>
int platform_device_add_data(struct platform_device *pdev, const void *data,
size_t size)
{
- void *d;
+ void *d = kmemdup(data, size, GFP_KERNEL);
- d = kmalloc(size, GFP_KERNEL);
if (d) {
- memcpy(d, data, size);
pdev->dev.platform_data = d;
+ return 0;
}
- return d ? 0 : -ENOMEM;
+ return -ENOMEM;
}
EXPORT_SYMBOL_GPL(platform_device_add_data);
.attrs = cciss_dev_attrs,
};
-static struct attribute_group *cciss_dev_attr_groups[] = {
+static const struct attribute_group *cciss_dev_attr_groups[] = {
&cciss_dev_attr_group,
NULL
};
static mempool_t *psd_pool;
static struct class *class_pktcdvd = NULL; /* /sys/class/pktcdvd */
-static struct dentry *pkt_debugfs_root = NULL; /* /debug/pktcdvd */
+static struct dentry *pkt_debugfs_root = NULL; /* /sys/kernel/debug/pktcdvd */
/* forward declaration */
static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev);
.write = kmsg_write,
};
-static const struct {
- unsigned int minor;
- char *name;
- umode_t mode;
- const struct file_operations *fops;
- struct backing_dev_info *dev_info;
-} devlist[] = { /* list of minor devices */
- {1, "mem", S_IRUSR | S_IWUSR | S_IRGRP, &mem_fops,
- &directly_mappable_cdev_bdi},
+static const struct memdev {
+ const char *name;
+ const struct file_operations *fops;
+ struct backing_dev_info *dev_info;
+} devlist[] = {
+ [ 1] = { "mem", &mem_fops, &directly_mappable_cdev_bdi },
#ifdef CONFIG_DEVKMEM
- {2, "kmem", S_IRUSR | S_IWUSR | S_IRGRP, &kmem_fops,
- &directly_mappable_cdev_bdi},
+ [ 2] = { "kmem", &kmem_fops, &directly_mappable_cdev_bdi },
#endif
- {3, "null", S_IRUGO | S_IWUGO, &null_fops, NULL},
+ [ 3] = {"null", &null_fops, NULL },
#ifdef CONFIG_DEVPORT
- {4, "port", S_IRUSR | S_IWUSR | S_IRGRP, &port_fops, NULL},
+ [ 4] = { "port", &port_fops, NULL },
#endif
- {5, "zero", S_IRUGO | S_IWUGO, &zero_fops, &zero_bdi},
- {7, "full", S_IRUGO | S_IWUGO, &full_fops, NULL},
- {8, "random", S_IRUGO | S_IWUSR, &random_fops, NULL},
- {9, "urandom", S_IRUGO | S_IWUSR, &urandom_fops, NULL},
- {11,"kmsg", S_IRUGO | S_IWUSR, &kmsg_fops, NULL},
+ [ 5] = { "zero", &zero_fops, &zero_bdi },
+ [ 7] = { "full", &full_fops, NULL },
+ [ 8] = { "random", &random_fops, NULL },
+ [ 9] = { "urandom", &urandom_fops, NULL },
+ [11] = { "kmsg", &kmsg_fops, NULL },
#ifdef CONFIG_CRASH_DUMP
- {12,"oldmem", S_IRUSR | S_IWUSR | S_IRGRP, &oldmem_fops, NULL},
+ [12] = { "oldmem", &oldmem_fops, NULL },
#endif
};
static int memory_open(struct inode *inode, struct file *filp)
{
- int ret = 0;
- int i;
+ int minor;
+ const struct memdev *dev;
+ int ret = -ENXIO;
lock_kernel();
- for (i = 0; i < ARRAY_SIZE(devlist); i++) {
- if (devlist[i].minor == iminor(inode)) {
- filp->f_op = devlist[i].fops;
- if (devlist[i].dev_info) {
- filp->f_mapping->backing_dev_info =
- devlist[i].dev_info;
- }
+ minor = iminor(inode);
+ if (minor >= ARRAY_SIZE(devlist))
+ goto out;
- break;
- }
- }
+ dev = &devlist[minor];
+ if (!dev->fops)
+ goto out;
- if (i == ARRAY_SIZE(devlist))
- ret = -ENXIO;
- else
- if (filp->f_op && filp->f_op->open)
- ret = filp->f_op->open(inode, filp);
+ filp->f_op = dev->fops;
+ if (dev->dev_info)
+ filp->f_mapping->backing_dev_info = dev->dev_info;
+ if (dev->fops->open)
+ ret = dev->fops->open(inode, filp);
+ else
+ ret = 0;
+out:
unlock_kernel();
return ret;
}
static const struct file_operations memory_fops = {
- .open = memory_open, /* just a selector for the real open */
+ .open = memory_open,
};
static struct class *mem_class;
static int __init chr_dev_init(void)
{
- int i;
+ int minor;
int err;
err = bdi_init(&zero_bdi);
printk("unable to get major %d for memory devs\n", MEM_MAJOR);
mem_class = class_create(THIS_MODULE, "mem");
- for (i = 0; i < ARRAY_SIZE(devlist); i++)
- device_create(mem_class, NULL,
- MKDEV(MEM_MAJOR, devlist[i].minor), NULL,
- devlist[i].name);
+ for (minor = 1; minor < ARRAY_SIZE(devlist); minor++) {
+ if (!devlist[minor].name)
+ continue;
+ device_create(mem_class, NULL, MKDEV(MEM_MAJOR, minor),
+ NULL, devlist[minor].name);
+ }
return 0;
}
group->groups[0] = &group->group;
group->groups[1] = NULL;
group->group.attrs = group->attrs;
- dev->groups = group->groups;
+ dev->groups = (const struct attribute_group **) group->groups;
}
static ssize_t modalias_show(struct device *dev,
.attrs = sys_dmi_attributes,
};
-static struct attribute_group* sys_dmi_attribute_groups[] = {
+static const struct attribute_group* sys_dmi_attribute_groups[] = {
&sys_dmi_attribute_group,
NULL
};
.attrs = ehca_drv_attrs
};
-static struct attribute_group *ehca_drv_attr_groups[] = {
+static const struct attribute_group *ehca_drv_attr_groups[] = {
&ehca_drv_attr_grp,
NULL,
};
extern const char ib_ipath_version[];
-extern struct attribute_group *ipath_driver_attr_groups[];
+extern const struct attribute_group *ipath_driver_attr_groups[];
int ipath_device_create_group(struct device *, struct ipath_devdata *);
void ipath_device_remove_group(struct device *, struct ipath_devdata *);
return ret;
}
-struct attribute_group *ipath_driver_attr_groups[] = {
+const struct attribute_group *ipath_driver_attr_groups[] = {
&driver_attr_group,
NULL,
};
.attrs = input_dev_caps_attrs,
};
-static struct attribute_group *input_dev_attr_groups[] = {
+static const struct attribute_group *input_dev_attr_groups[] = {
&input_dev_attr_group,
&input_dev_id_attr_group,
&input_dev_caps_attr_group,
put_device(dev->parent);
}
-static struct attribute_group *enclosure_groups[];
+static const struct attribute_group *enclosure_groups[];
/**
* enclosure_component_register - add a particular component to an enclosure
.attrs = enclosure_component_attrs,
};
-static struct attribute_group *enclosure_groups[] = {
+static const struct attribute_group *enclosure_groups[] = {
&enclosure_group,
NULL
};
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/pci.h>
+#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/file.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <linux/io.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
#include "hpilo.h"
static struct class *ilo_class;
static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry)
{
struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
+ unsigned long flags;
int ret = 0;
- spin_lock(&hw->fifo_lock);
+ spin_lock_irqsave(&hw->fifo_lock, flags);
if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask]
& ENTRY_MASK_O)) {
fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |=
fifo_q->tail += 1;
ret = 1;
}
- spin_unlock(&hw->fifo_lock);
+ spin_unlock_irqrestore(&hw->fifo_lock, flags);
return ret;
}
static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry)
{
struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
+ unsigned long flags;
int ret = 0;
u64 c;
- spin_lock(&hw->fifo_lock);
+ spin_lock_irqsave(&hw->fifo_lock, flags);
c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
if (c & ENTRY_MASK_C) {
if (entry)
fifo_q->head += 1;
ret = 1;
}
- spin_unlock(&hw->fifo_lock);
+ spin_unlock_irqrestore(&hw->fifo_lock, flags);
+
+ return ret;
+}
+
+static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar)
+{
+ struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
+ unsigned long flags;
+ int ret = 0;
+ u64 c;
+
+ spin_lock_irqsave(&hw->fifo_lock, flags);
+ c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
+ if (c & ENTRY_MASK_C)
+ ret = 1;
+ spin_unlock_irqrestore(&hw->fifo_lock, flags);
return ret;
}
return ret;
}
+static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb)
+{
+ char *fifobar = ccb->ccb_u3.recv_fifobar;
+
+ return fifo_check_recv(hw, fifobar);
+}
+
static inline void doorbell_set(struct ccb *ccb)
{
iowrite8(1, ccb->ccb_u5.db_base);
{
iowrite8(2, ccb->ccb_u5.db_base);
}
+
static inline int ctrl_set(int l2sz, int idxmask, int desclim)
{
int active = 0, go = 1;
active << CTRL_BITPOS_A |
go << CTRL_BITPOS_G;
}
+
static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz)
{
/* for simplicity, use the same parameters for send and recv ctrls */
static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
{
- struct ccb *driver_ccb;
- struct ccb __iomem *device_ccb;
+ struct ccb *driver_ccb = &data->driver_ccb;
+ struct ccb __iomem *device_ccb = data->mapped_ccb;
int retries;
- driver_ccb = &data->driver_ccb;
- device_ccb = data->mapped_ccb;
-
/* complicated dance to tell the hw we are stopping */
doorbell_clr(driver_ccb);
iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G),
pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa);
}
-static int ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
+static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
{
char *dma_va, *dma_pa;
- int pkt_id, pkt_sz, i, error;
struct ccb *driver_ccb, *ilo_ccb;
- struct pci_dev *pdev;
driver_ccb = &data->driver_ccb;
ilo_ccb = &data->ilo_ccb;
- pdev = hw->ilo_dev;
data->dma_size = 2 * fifo_sz(NR_QENTRY) +
2 * desc_mem_sz(NR_QENTRY) +
ILO_START_ALIGN + ILO_CACHE_SZ;
- error = -ENOMEM;
- data->dma_va = pci_alloc_consistent(pdev, data->dma_size,
+ data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size,
&data->dma_pa);
if (!data->dma_va)
- goto out;
+ return -ENOMEM;
dma_va = (char *)data->dma_va;
dma_pa = (char *)data->dma_pa;
driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE);
ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */
+ return 0;
+}
+
+static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
+{
+ int pkt_id, pkt_sz;
+ struct ccb *driver_ccb = &data->driver_ccb;
+
/* copy the ccb with physical addrs to device memory */
data->mapped_ccb = (struct ccb __iomem *)
(hw->ram_vaddr + (slot * ILOHW_CCB_SZ));
- memcpy_toio(data->mapped_ccb, ilo_ccb, sizeof(struct ccb));
+ memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb));
/* put packets on the send and receive queues */
pkt_sz = 0;
for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++)
ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz);
+ /* the ccb is ready to use */
doorbell_clr(driver_ccb);
+}
+
+static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data)
+{
+ int pkt_id, i;
+ struct ccb *driver_ccb = &data->driver_ccb;
/* make sure iLO is really handling requests */
for (i = MAX_WAIT; i > 0; i--) {
udelay(WAIT_TIME);
}
- if (i) {
- ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
- doorbell_set(driver_ccb);
- } else {
- dev_err(&pdev->dev, "Open could not dequeue a packet\n");
- error = -EBUSY;
- goto free;
+ if (i == 0) {
+ dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n");
+ return -EBUSY;
}
+ ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
+ doorbell_set(driver_ccb);
return 0;
-free:
- ilo_ccb_close(pdev, data);
-out:
- return error;
}
static inline int is_channel_reset(struct ccb *ccb)
FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1;
}
+static inline int get_device_outbound(struct ilo_hwinfo *hw)
+{
+ return ioread32(&hw->mmio_vaddr[DB_OUT]);
+}
+
+static inline int is_db_reset(int db_out)
+{
+ return db_out & (1 << DB_RESET);
+}
+
static inline int is_device_reset(struct ilo_hwinfo *hw)
{
/* check for global reset condition */
- return ioread32(&hw->mmio_vaddr[DB_OUT]) & (1 << DB_RESET);
+ return is_db_reset(get_device_outbound(hw));
+}
+
+static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr)
+{
+ iowrite32(clr, &hw->mmio_vaddr[DB_OUT]);
}
static inline void clear_device(struct ilo_hwinfo *hw)
{
/* clear the device (reset bits, pending channel entries) */
- iowrite32(-1, &hw->mmio_vaddr[DB_OUT]);
+ clear_pending_db(hw, -1);
+}
+
+static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw)
+{
+ iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]);
}
-static void ilo_locked_reset(struct ilo_hwinfo *hw)
+static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw)
+{
+ iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1,
+ &hw->mmio_vaddr[DB_IRQ]);
+}
+
+static void ilo_set_reset(struct ilo_hwinfo *hw)
{
int slot;
continue;
set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb);
}
-
- clear_device(hw);
-}
-
-static void ilo_reset(struct ilo_hwinfo *hw)
-{
- spin_lock(&hw->alloc_lock);
-
- /* reset might have been handled after lock was taken */
- if (is_device_reset(hw))
- ilo_locked_reset(hw);
-
- spin_unlock(&hw->alloc_lock);
}
static ssize_t ilo_read(struct file *fp, char __user *buf,
size_t len, loff_t *off)
{
int err, found, cnt, pkt_id, pkt_len;
- struct ccb_data *data;
- struct ccb *driver_ccb;
- struct ilo_hwinfo *hw;
+ struct ccb_data *data = fp->private_data;
+ struct ccb *driver_ccb = &data->driver_ccb;
+ struct ilo_hwinfo *hw = data->ilo_hw;
void *pkt;
- data = fp->private_data;
- driver_ccb = &data->driver_ccb;
- hw = data->ilo_hw;
-
- if (is_device_reset(hw) || is_channel_reset(driver_ccb)) {
+ if (is_channel_reset(driver_ccb)) {
/*
* If the device has been reset, applications
* need to close and reopen all ccbs.
*/
- ilo_reset(hw);
return -ENODEV;
}
size_t len, loff_t *off)
{
int err, pkt_id, pkt_len;
- struct ccb_data *data;
- struct ccb *driver_ccb;
- struct ilo_hwinfo *hw;
+ struct ccb_data *data = fp->private_data;
+ struct ccb *driver_ccb = &data->driver_ccb;
+ struct ilo_hwinfo *hw = data->ilo_hw;
void *pkt;
- data = fp->private_data;
- driver_ccb = &data->driver_ccb;
- hw = data->ilo_hw;
-
- if (is_device_reset(hw) || is_channel_reset(driver_ccb)) {
- /*
- * If the device has been reset, applications
- * need to close and reopen all ccbs.
- */
- ilo_reset(hw);
+ if (is_channel_reset(driver_ccb))
return -ENODEV;
- }
/* get a packet to send the user command */
if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt))
return err ? -EFAULT : len;
}
+static unsigned int ilo_poll(struct file *fp, poll_table *wait)
+{
+ struct ccb_data *data = fp->private_data;
+ struct ccb *driver_ccb = &data->driver_ccb;
+
+ poll_wait(fp, &data->ccb_waitq, wait);
+
+ if (is_channel_reset(driver_ccb))
+ return POLLERR;
+ else if (ilo_pkt_recv(data->ilo_hw, driver_ccb))
+ return POLLIN | POLLRDNORM;
+
+ return 0;
+}
+
static int ilo_close(struct inode *ip, struct file *fp)
{
int slot;
struct ccb_data *data;
struct ilo_hwinfo *hw;
+ unsigned long flags;
slot = iminor(ip) % MAX_CCB;
hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
- spin_lock(&hw->alloc_lock);
-
- if (is_device_reset(hw))
- ilo_locked_reset(hw);
+ spin_lock(&hw->open_lock);
if (hw->ccb_alloc[slot]->ccb_cnt == 1) {
data = fp->private_data;
+ spin_lock_irqsave(&hw->alloc_lock, flags);
+ hw->ccb_alloc[slot] = NULL;
+ spin_unlock_irqrestore(&hw->alloc_lock, flags);
+
ilo_ccb_close(hw->ilo_dev, data);
kfree(data);
- hw->ccb_alloc[slot] = NULL;
} else
hw->ccb_alloc[slot]->ccb_cnt--;
- spin_unlock(&hw->alloc_lock);
+ spin_unlock(&hw->open_lock);
return 0;
}
int slot, error;
struct ccb_data *data;
struct ilo_hwinfo *hw;
+ unsigned long flags;
slot = iminor(ip) % MAX_CCB;
hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
if (!data)
return -ENOMEM;
- spin_lock(&hw->alloc_lock);
-
- if (is_device_reset(hw))
- ilo_locked_reset(hw);
+ spin_lock(&hw->open_lock);
/* each fd private_data holds sw/hw view of ccb */
if (hw->ccb_alloc[slot] == NULL) {
/* create a channel control block for this minor */
- error = ilo_ccb_open(hw, data, slot);
- if (!error) {
- hw->ccb_alloc[slot] = data;
- hw->ccb_alloc[slot]->ccb_cnt = 1;
- hw->ccb_alloc[slot]->ccb_excl = fp->f_flags & O_EXCL;
- hw->ccb_alloc[slot]->ilo_hw = hw;
- } else
+ error = ilo_ccb_setup(hw, data, slot);
+ if (error) {
kfree(data);
+ goto out;
+ }
+
+ data->ccb_cnt = 1;
+ data->ccb_excl = fp->f_flags & O_EXCL;
+ data->ilo_hw = hw;
+ init_waitqueue_head(&data->ccb_waitq);
+
+ /* write the ccb to hw */
+ spin_lock_irqsave(&hw->alloc_lock, flags);
+ ilo_ccb_open(hw, data, slot);
+ hw->ccb_alloc[slot] = data;
+ spin_unlock_irqrestore(&hw->alloc_lock, flags);
+
+ /* make sure the channel is functional */
+ error = ilo_ccb_verify(hw, data);
+ if (error) {
+
+ spin_lock_irqsave(&hw->alloc_lock, flags);
+ hw->ccb_alloc[slot] = NULL;
+ spin_unlock_irqrestore(&hw->alloc_lock, flags);
+
+ ilo_ccb_close(hw->ilo_dev, data);
+
+ kfree(data);
+ goto out;
+ }
+
} else {
kfree(data);
if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) {
error = 0;
}
}
- spin_unlock(&hw->alloc_lock);
+out:
+ spin_unlock(&hw->open_lock);
if (!error)
fp->private_data = hw->ccb_alloc[slot];
.owner = THIS_MODULE,
.read = ilo_read,
.write = ilo_write,
+ .poll = ilo_poll,
.open = ilo_open,
.release = ilo_close,
};
+static irqreturn_t ilo_isr(int irq, void *data)
+{
+ struct ilo_hwinfo *hw = data;
+ int pending, i;
+
+ spin_lock(&hw->alloc_lock);
+
+ /* check for ccbs which have data */
+ pending = get_device_outbound(hw);
+ if (!pending) {
+ spin_unlock(&hw->alloc_lock);
+ return IRQ_NONE;
+ }
+
+ if (is_db_reset(pending)) {
+ /* wake up all ccbs if the device was reset */
+ pending = -1;
+ ilo_set_reset(hw);
+ }
+
+ for (i = 0; i < MAX_CCB; i++) {
+ if (!hw->ccb_alloc[i])
+ continue;
+ if (pending & (1 << i))
+ wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq);
+ }
+
+ /* clear the device of the channels that have been handled */
+ clear_pending_db(hw, pending);
+
+ spin_unlock(&hw->alloc_lock);
+
+ return IRQ_HANDLED;
+}
+
static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
{
pci_iounmap(pdev, hw->db_vaddr);
device_destroy(ilo_class, MKDEV(ilo_major, i));
cdev_del(&ilo_hw->cdev);
+ ilo_disable_interrupts(ilo_hw);
+ free_irq(pdev->irq, ilo_hw);
ilo_unmap_device(pdev, ilo_hw);
pci_release_regions(pdev);
pci_disable_device(pdev);
ilo_hw->ilo_dev = pdev;
spin_lock_init(&ilo_hw->alloc_lock);
spin_lock_init(&ilo_hw->fifo_lock);
+ spin_lock_init(&ilo_hw->open_lock);
error = pci_enable_device(pdev);
if (error)
pci_set_drvdata(pdev, ilo_hw);
clear_device(ilo_hw);
+ error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw);
+ if (error)
+ goto unmap;
+
+ ilo_enable_interrupts(ilo_hw);
+
cdev_init(&ilo_hw->cdev, &ilo_fops);
ilo_hw->cdev.owner = THIS_MODULE;
start = devnum * MAX_CCB;
error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), MAX_CCB);
if (error) {
dev_err(&pdev->dev, "Could not add cdev\n");
- goto unmap;
+ goto remove_isr;
}
for (minor = 0 ; minor < MAX_CCB; minor++) {
}
return 0;
+remove_isr:
+ ilo_disable_interrupts(ilo_hw);
+ free_irq(pdev->irq, ilo_hw);
unmap:
ilo_unmap_device(pdev, ilo_hw);
free_regions:
class_destroy(ilo_class);
}
-MODULE_VERSION("1.1");
+MODULE_VERSION("1.2");
MODULE_ALIAS(ILO_NAME);
MODULE_DESCRIPTION(ILO_NAME);
MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>");
spinlock_t alloc_lock;
spinlock_t fifo_lock;
+ spinlock_t open_lock;
struct cdev cdev;
};
-/* offset from mmio_vaddr */
+/* offset from mmio_vaddr for enabling doorbell interrupts */
+#define DB_IRQ 0xB2
+/* offset from mmio_vaddr for outbound communications */
#define DB_OUT 0xD4
/* DB_OUT reset bit */
#define DB_RESET 26
/* pointer to hardware device info */
struct ilo_hwinfo *ilo_hw;
+ /* queue for this ccb to wait for recv data */
+ wait_queue_head_t ccb_waitq;
+
/* usage count, to allow for shared ccb's */
int ccb_cnt;
.attrs = mmc_std_attrs,
};
-static struct attribute_group *mmc_attr_groups[] = {
+static const struct attribute_group *mmc_attr_groups[] = {
&mmc_std_attr_group,
NULL,
};
.attrs = sd_std_attrs,
};
-static struct attribute_group *sd_attr_groups[] = {
+static const struct attribute_group *sd_attr_groups[] = {
&sd_std_attr_group,
NULL,
};
.attrs = mtd_attrs,
};
-struct attribute_group *mtd_groups[] = {
+const struct attribute_group *mtd_groups[] = {
&mtd_group,
NULL,
};
To see the list of debug modules and levels, see iwm/debug.h
For example, if you want the full MLME debug output:
- echo 0xff > /debug/iwm/phyN/debug/mlme
+ echo 0xff > /sys/kernel/debug/iwm/phyN/debug/mlme
Or, if you want the full debug, for all modules:
- echo 0xff > /debug/iwm/phyN/debug/level
- echo 0xff > /debug/iwm/phyN/debug/modules
+ echo 0xff > /sys/kernel/debug/iwm/phyN/debug/level
+ echo 0xff > /sys/kernel/debug/iwm/phyN/debug/modules
.attrs = subch_attrs,
};
-static struct attribute_group *default_subch_attr_groups[] = {
+static const struct attribute_group *default_subch_attr_groups[] = {
&subch_attr_group,
NULL,
};
.attrs = ccwdev_attrs,
};
-static struct attribute_group *ccwdev_attr_groups[] = {
+static const struct attribute_group *ccwdev_attr_groups[] = {
&ccwdev_attr_group,
NULL,
};
.attrs = netiucv_drv_attrs,
};
-static struct attribute_group *netiucv_drv_attr_groups[] = {
+static const struct attribute_group *netiucv_drv_attr_groups[] = {
&netiucv_drv_attr_group,
NULL,
};
extern void __scsi_remove_device(struct scsi_device *);
extern struct bus_type scsi_bus_type;
-extern struct attribute_group *scsi_sysfs_shost_attr_groups[];
+extern const struct attribute_group *scsi_sysfs_shost_attr_groups[];
/* scsi_netlink.c */
#ifdef CONFIG_SCSI_NETLINK
.attrs = scsi_sysfs_shost_attrs,
};
-struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
+const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
&scsi_shost_attr_group,
NULL
};
.attrs = scsi_sdev_attrs,
};
-static struct attribute_group *scsi_sdev_attr_groups[] = {
+static const struct attribute_group *scsi_sdev_attr_groups[] = {
&scsi_sdev_attr_group,
NULL
};
menuconfig UIO
tristate "Userspace I/O drivers"
depends on !S390
- default n
help
Enable this to allow the userspace driver core code to be
built. This code allows userspace programs easy access to
config UIO_CIF
tristate "generic Hilscher CIF Card driver"
depends on PCI
- default n
help
Driver for Hilscher CIF DeviceNet and Profibus cards. This
driver requires a userspace component that handles all of the
config UIO_SMX
tristate "SMX cryptengine UIO interface"
- default n
help
Userspace IO interface to the Cryptography engine found on the
Nias Digital SMX boards. These will be available from Q4 2008
config UIO_AEC
tristate "AEC video timestamp device"
depends on PCI
- default n
help
UIO driver for the Adrienne Electronics Corporation PCI time
config UIO_SERCOS3
tristate "Automata Sercos III PCI card driver"
- default n
help
Userspace I/O interface for the Sercos III PCI card from
Automata GmbH. The userspace part of this driver will be
If you compile this as a module, it will be called uio_sercos3.
+config UIO_PCI_GENERIC
+ tristate "Generic driver for PCI 2.3 and PCI Express cards"
+ depends on PCI
+ default n
+ help
+ Generic driver that you can bind, dynamically, to any
+ PCI 2.3 compliant and PCI Express card. It is useful,
+ primarily, for virtualization scenarios.
+ If you compile this as a module, it will be called uio_pci_generic.
+
endif
obj-$(CONFIG_UIO_SMX) += uio_smx.o
obj-$(CONFIG_UIO_AEC) += uio_aec.o
obj-$(CONFIG_UIO_SERCOS3) += uio_sercos3.o
+obj-$(CONFIG_UIO_PCI_GENERIC) += uio_pci_generic.o
--- /dev/null
+/* uio_pci_generic - generic UIO driver for PCI 2.3 devices
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ * Author: Michael S. Tsirkin <mst@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ *
+ * Since the driver does not declare any device ids, you must allocate
+ * id and bind the device to the driver yourself. For example:
+ *
+ * # echo "8086 10f5" > /sys/bus/pci/drivers/uio_pci_generic/new_id
+ * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/e1000e/unbind
+ * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
+ * # ls -l /sys/bus/pci/devices/0000:00:19.0/driver
+ * .../0000:00:19.0/driver -> ../../../bus/pci/drivers/uio_pci_generic
+ *
+ * Driver won't bind to devices which do not support the Interrupt Disable Bit
+ * in the command register. All devices compliant to PCI 2.3 (circa 2002) and
+ * all compliant PCI Express devices should support this bit.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/uio_driver.h>
+#include <linux/spinlock.h>
+
+#define DRIVER_VERSION "0.01.0"
+#define DRIVER_AUTHOR "Michael S. Tsirkin <mst@redhat.com>"
+#define DRIVER_DESC "Generic UIO driver for PCI 2.3 devices"
+
+struct uio_pci_generic_dev {
+ struct uio_info info;
+ struct pci_dev *pdev;
+ spinlock_t lock; /* guards command register accesses */
+};
+
+static inline struct uio_pci_generic_dev *
+to_uio_pci_generic_dev(struct uio_info *info)
+{
+ return container_of(info, struct uio_pci_generic_dev, info);
+}
+
+/* Interrupt handler. Read/modify/write the command register to disable
+ * the interrupt. */
+static irqreturn_t irqhandler(int irq, struct uio_info *info)
+{
+ struct uio_pci_generic_dev *gdev = to_uio_pci_generic_dev(info);
+ struct pci_dev *pdev = gdev->pdev;
+ irqreturn_t ret = IRQ_NONE;
+ u32 cmd_status_dword;
+ u16 origcmd, newcmd, status;
+
+ /* We do a single dword read to retrieve both command and status.
+ * Document assumptions that make this possible. */
+ BUILD_BUG_ON(PCI_COMMAND % 4);
+ BUILD_BUG_ON(PCI_COMMAND + 2 != PCI_STATUS);
+
+ spin_lock_irq(&gdev->lock);
+ pci_block_user_cfg_access(pdev);
+
+ /* Read both command and status registers in a single 32-bit operation.
+ * Note: we could cache the value for command and move the status read
+ * out of the lock if there was a way to get notified of user changes
+ * to command register through sysfs. Should be good for shared irqs. */
+ pci_read_config_dword(pdev, PCI_COMMAND, &cmd_status_dword);
+ origcmd = cmd_status_dword;
+ status = cmd_status_dword >> 16;
+
+ /* Check interrupt status register to see whether our device
+ * triggered the interrupt. */
+ if (!(status & PCI_STATUS_INTERRUPT))
+ goto done;
+
+ /* We triggered the interrupt, disable it. */
+ newcmd = origcmd | PCI_COMMAND_INTX_DISABLE;
+ if (newcmd != origcmd)
+ pci_write_config_word(pdev, PCI_COMMAND, newcmd);
+
+ /* UIO core will signal the user process. */
+ ret = IRQ_HANDLED;
+done:
+
+ pci_unblock_user_cfg_access(pdev);
+ spin_unlock_irq(&gdev->lock);
+ return ret;
+}
+
+/* Verify that the device supports Interrupt Disable bit in command register,
+ * per PCI 2.3, by flipping this bit and reading it back: this bit was readonly
+ * in PCI 2.2. */
+static int __devinit verify_pci_2_3(struct pci_dev *pdev)
+{
+ u16 orig, new;
+ int err = 0;
+
+ pci_block_user_cfg_access(pdev);
+ pci_read_config_word(pdev, PCI_COMMAND, &orig);
+ pci_write_config_word(pdev, PCI_COMMAND,
+ orig ^ PCI_COMMAND_INTX_DISABLE);
+ pci_read_config_word(pdev, PCI_COMMAND, &new);
+ /* There's no way to protect against
+ * hardware bugs or detect them reliably, but as long as we know
+ * what the value should be, let's go ahead and check it. */
+ if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
+ err = -EBUSY;
+ dev_err(&pdev->dev, "Command changed from 0x%x to 0x%x: "
+ "driver or HW bug?\n", orig, new);
+ goto err;
+ }
+ if (!((new ^ orig) & PCI_COMMAND_INTX_DISABLE)) {
+ dev_warn(&pdev->dev, "Device does not support "
+ "disabling interrupts: unable to bind.\n");
+ err = -ENODEV;
+ goto err;
+ }
+ /* Now restore the original value. */
+ pci_write_config_word(pdev, PCI_COMMAND, orig);
+err:
+ pci_unblock_user_cfg_access(pdev);
+ return err;
+}
+
+static int __devinit probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct uio_pci_generic_dev *gdev;
+ int err;
+
+ if (!pdev->irq) {
+ dev_warn(&pdev->dev, "No IRQ assigned to device: "
+ "no support for interrupts?\n");
+ return -ENODEV;
+ }
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "%s: pci_enable_device failed: %d\n",
+ __func__, err);
+ return err;
+ }
+
+ err = verify_pci_2_3(pdev);
+ if (err)
+ goto err_verify;
+
+ gdev = kzalloc(sizeof(struct uio_pci_generic_dev), GFP_KERNEL);
+ if (!gdev) {
+ err = -ENOMEM;
+ goto err_alloc;
+ }
+
+ gdev->info.name = "uio_pci_generic";
+ gdev->info.version = DRIVER_VERSION;
+ gdev->info.irq = pdev->irq;
+ gdev->info.irq_flags = IRQF_SHARED;
+ gdev->info.handler = irqhandler;
+ gdev->pdev = pdev;
+ spin_lock_init(&gdev->lock);
+
+ if (uio_register_device(&pdev->dev, &gdev->info))
+ goto err_register;
+ pci_set_drvdata(pdev, gdev);
+
+ return 0;
+err_register:
+ kfree(gdev);
+err_alloc:
+err_verify:
+ pci_disable_device(pdev);
+ return err;
+}
+
+static void remove(struct pci_dev *pdev)
+{
+ struct uio_pci_generic_dev *gdev = pci_get_drvdata(pdev);
+
+ uio_unregister_device(&gdev->info);
+ pci_disable_device(pdev);
+ kfree(gdev);
+}
+
+static struct pci_driver driver = {
+ .name = "uio_pci_generic",
+ .id_table = NULL, /* only dynamic id's */
+ .probe = probe,
+ .remove = remove,
+};
+
+static int __init init(void)
+{
+ pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+ return pci_register_driver(&driver);
+}
+
+static void __exit cleanup(void)
+{
+ pci_unregister_driver(&driver);
+}
+
+module_init(init);
+module_exit(cleanup);
+
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
static struct attribute_group ep_dev_attr_grp = {
.attrs = ep_dev_attrs,
};
-static struct attribute_group *ep_dev_groups[] = {
+static const struct attribute_group *ep_dev_groups[] = {
&ep_dev_attr_grp,
NULL
};
.is_visible = dev_string_attrs_are_visible,
};
-struct attribute_group *usb_device_groups[] = {
+const struct attribute_group *usb_device_groups[] = {
&dev_attr_grp,
&dev_string_attr_grp,
NULL
.is_visible = intf_assoc_attrs_are_visible,
};
-struct attribute_group *usb_interface_groups[] = {
+const struct attribute_group *usb_interface_groups[] = {
&intf_attr_grp,
&intf_assoc_attr_grp,
NULL
extern const char *usbcore_name;
/* sysfs stuff */
-extern struct attribute_group *usb_device_groups[];
-extern struct attribute_group *usb_interface_groups[];
+extern const struct attribute_group *usb_device_groups[];
+extern const struct attribute_group *usb_interface_groups[];
/* usbfs stuff */
extern struct mutex usbfs_mutex;
* debug = 0, no debugging messages
* debug = 1, dump failed URBs except for stalls
* debug = 2, dump all failed URBs (including stalls)
- * show all queues in /debug/uhci/[pci_addr]
+ * show all queues in /sys/kernel/debug/uhci/[pci_addr]
* debug = 3, show all TDs in URBs when dumping
*/
#ifdef DEBUG
.attrs = dev_attrs,
};
-static struct attribute_group *groups[] = {
+static const struct attribute_group *groups[] = {
&dev_attr_group,
NULL,
};
.attrs = part_attrs,
};
-static struct attribute_group *part_attr_groups[] = {
+static const struct attribute_group *part_attr_groups[] = {
&part_attr_group,
#ifdef CONFIG_BLK_DEV_IO_TRACE
&blk_trace_attr_group,
struct list_head node;
struct klist containers;
struct class *class;
- struct attribute_group *grp;
+ const struct attribute_group *grp;
struct device_attribute **attrs;
int (*match)(struct attribute_container *, struct device *);
#define ATTRIBUTE_CONTAINER_NO_CLASSDEVS 0x01
* device.h - generic, centralized driver model
*
* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
- * Copyright (c) 2004-2007 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2009 Novell Inc.
*
* This file is released under the GPLv2
*
void (*shutdown) (struct device *dev);
int (*suspend) (struct device *dev, pm_message_t state);
int (*resume) (struct device *dev);
- struct attribute_group **groups;
+ const struct attribute_group **groups;
const struct dev_pm_ops *pm;
__class_register(class, &__key); \
})
+struct class_compat;
+struct class_compat *class_compat_register(const char *name);
+void class_compat_unregister(struct class_compat *cls);
+int class_compat_create_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link);
+void class_compat_remove_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link);
+
extern void class_dev_iter_init(struct class_dev_iter *iter,
struct class *class,
struct device *start,
*/
struct device_type {
const char *name;
- struct attribute_group **groups;
+ const struct attribute_group **groups;
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
char *(*nodename)(struct device *dev);
void (*release)(struct device *dev);
struct bus_type *bus; /* type of bus device is on */
struct device_driver *driver; /* which driver has allocated this
device */
- void *driver_data; /* data private to the driver */
void *platform_data; /* Platform specific data, device
core doesn't touch it */
struct dev_pm_info power;
struct klist_node knode_class;
struct class *class;
- struct attribute_group **groups; /* optional groups */
+ const struct attribute_group **groups; /* optional groups */
void (*release)(struct device *dev);
};
}
#endif
-static inline void *dev_get_drvdata(const struct device *dev)
-{
- return dev->driver_data;
-}
-
-static inline void dev_set_drvdata(struct device *dev, void *data)
-{
- dev->driver_data = data;
-}
-
static inline unsigned int dev_get_uevent_suppress(const struct device *dev)
{
return dev->kobj.uevent_suppress;
extern int device_move(struct device *dev, struct device *new_parent,
enum dpm_order dpm_order);
extern const char *device_get_nodename(struct device *dev, const char **tmp);
+extern void *dev_get_drvdata(const struct device *dev);
+extern void dev_set_drvdata(struct device *dev, void *data);
/*
* Root device objects for grouping under /sys/devices
}
extern void root_device_unregister(struct device *root);
+static inline void *dev_get_platdata(const struct device *dev)
+{
+ return dev->platform_data;
+}
+
/*
* Manual binding of a device to driver. See drivers/base/bus.c
* for information on use.
extern void wait_for_device_probe(void);
+#ifdef CONFIG_DEVTMPFS
+extern int devtmpfs_create_node(struct device *dev);
+extern int devtmpfs_delete_node(struct device *dev);
+extern int devtmpfs_mount(const char *mountpoint);
+#else
+static inline int devtmpfs_create_node(struct device *dev) { return 0; }
+static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
+static inline int devtmpfs_mount(const char *mountpoint) { return 0; }
+#endif
+
/* drivers/base/power/shutdown.c */
extern void device_shutdown(void);
/* class/net/name entry */
struct device dev;
/* space for optional statistics and wireless sysfs groups */
- struct attribute_group *sysfs_groups[3];
+ const struct attribute_group *sysfs_groups[3];
/* rtnetlink link ops */
const struct rtnl_link_ops *rtnl_link_ops;
#define PCI_COMMAND_INTX_DISABLE 0x400 /* INTx Emulation Disable */
#define PCI_STATUS 0x06 /* 16 bits */
+#define PCI_STATUS_INTERRUPT 0x08 /* Interrupt status */
#define PCI_STATUS_CAP_LIST 0x10 /* Support Capability List */
#define PCI_STATUS_66MHZ 0x20 /* Support 66 Mhz PCI 2.1 bus */
#define PCI_STATUS_UDF 0x40 /* Support User Definable Features [obsolete] */
return container_of(inode, struct shmem_inode_info, vfs_inode);
}
+extern int init_tmpfs(void);
+extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
+
#ifdef CONFIG_TMPFS_POSIX_ACL
int shmem_check_acl(struct inode *, int);
int shmem_acl_init(struct inode *, struct inode *);
struct transport_container {
struct attribute_container ac;
- struct attribute_group *statistics;
+ const struct attribute_group *statistics;
};
#define attribute_container_to_transport_container(x) \
mount_root();
out:
+ devtmpfs_mount("dev");
sys_mount(".", "/", NULL, MS_MOVE, NULL);
sys_chroot(".");
}
-
#include <linux/async.h>
#include <linux/kmemcheck.h>
#include <linux/kmemtrace.h>
+#include <linux/shmem_fs.h>
#include <trace/boot.h>
#include <asm/io.h>
init_workqueues();
cpuset_init_smp();
usermodehelper_init();
+ init_tmpfs();
driver_init();
init_irq_proc();
do_ctors();
obj-$(CONFIG_MARKERS) += marker.o
obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
obj-$(CONFIG_LATENCYTOP) += latencytop.o
-obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_X86_DS) += trace/
sb->s_fs_info = NULL;
}
-static int shmem_fill_super(struct super_block *sb,
- void *data, int silent)
+int shmem_fill_super(struct super_block *sb, void *data, int silent)
{
struct inode *inode;
struct dentry *root;
.kill_sb = kill_litter_super,
};
-static int __init init_tmpfs(void)
+int __init init_tmpfs(void)
{
int error;
.kill_sb = kill_litter_super,
};
-static int __init init_tmpfs(void)
+int __init init_tmpfs(void)
{
BUG_ON(register_filesystem(&tmpfs_fs_type) != 0);
vma->vm_ops = &shmem_vm_ops;
return 0;
}
-
-module_init(init_tmpfs)
.attrs = bt_link_attrs,
};
-static struct attribute_group *bt_link_groups[] = {
+static const struct attribute_group *bt_link_groups[] = {
&bt_link_group,
NULL
};
.attrs = bt_host_attrs,
};
-static struct attribute_group *bt_host_groups[] = {
+static const struct attribute_group *bt_host_groups[] = {
&bt_host_group,
NULL
};
int netdev_register_kobject(struct net_device *net)
{
struct device *dev = &(net->dev);
- struct attribute_group **groups = net->sysfs_groups;
+ const struct attribute_group **groups = net->sysfs_groups;
dev->class = &net_class;
dev->platform_data = net;
/*
* If TRACE_SYSTEM is defined, that will be the directory created
- * in the ftrace directory under /debugfs/tracing/events/<system>
+ * in the ftrace directory under /sys/kernel/debug/tracing/events/<system>
*
* The define_trace.h below will also look for a file name of
* TRACE_SYSTEM.h where TRACE_SYSTEM is what is defined here.
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