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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

This commit is contained in:
David Woodhouse 2008-04-22 12:34:25 +01:00
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2
.gitignore поставляемый
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@ -53,3 +53,5 @@ cscope.*
*.orig
*.rej
*~
\#*#

28
Documentation/00-INDEX
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@ -25,8 +25,6 @@ DMA-API.txt
- DMA API, pci_ API & extensions for non-consistent memory machines.
DMA-ISA-LPC.txt
- How to do DMA with ISA (and LPC) devices.
DMA-mapping.txt
- info for PCI drivers using DMA portably across all platforms.
DocBook/
- directory with DocBook templates etc. for kernel documentation.
HOWTO
@ -43,8 +41,6 @@ ManagementStyle
- how to (attempt to) manage kernel hackers.
MSI-HOWTO.txt
- the Message Signaled Interrupts (MSI) Driver Guide HOWTO and FAQ.
PCIEBUS-HOWTO.txt
- a guide describing the PCI Express Port Bus driver.
RCU/
- directory with info on RCU (read-copy update).
README.DAC960
@ -167,10 +163,8 @@ highuid.txt
- notes on the change from 16 bit to 32 bit user/group IDs.
hpet.txt
- High Precision Event Timer Driver for Linux.
hrtimer/
- info on the timer_stats debugging facility for timer (ab)use.
hrtimers/
- info on the hrtimers subsystem for high-resolution kernel timers.
timers/
- info on the timer related topics
hw_random.txt
- info on Linux support for random number generator in i8xx chipsets.
hwmon/
@ -183,8 +177,6 @@ i386/
- directory with info about Linux on Intel 32 bit architecture.
ia64/
- directory with info about Linux on Intel 64 bit architecture.
ide.txt
- important info for users of ATA devices (IDE/EIDE disks and CD-ROMS).
infiniband/
- directory with documents concerning Linux InfiniBand support.
initrd.txt
@ -227,8 +219,6 @@ kprobes.txt
- documents the kernel probes debugging feature.
kref.txt
- docs on adding reference counters (krefs) to kernel objects.
laptop-mode.txt
- how to conserve battery power using laptop-mode.
laptops/
- directory with laptop related info and laptop driver documentation.
ldm.txt
@ -275,8 +265,6 @@ netlabel/
- directory with information on the NetLabel subsystem.
networking/
- directory with info on various aspects of networking with Linux.
nfsroot.txt
- short guide on setting up a diskless box with NFS root filesystem.
nmi_watchdog.txt
- info on NMI watchdog for SMP systems.
nommu-mmap.txt
@ -293,22 +281,12 @@ parport.txt
- how to use the parallel-port driver.
parport-lowlevel.txt
- description and usage of the low level parallel port functions.
pci-error-recovery.txt
- info on PCI error recovery.
pci.txt
- info on the PCI subsystem for device driver authors.
pcieaer-howto.txt
- the PCI Express Advanced Error Reporting Driver Guide HOWTO.
pcmcia/
- info on the Linux PCMCIA driver.
pi-futex.txt
- documentation on lightweight PI-futexes.
pm.txt
- info on Linux power management support.
pnp.txt
- Linux Plug and Play documentation.
power_supply_class.txt
- Tells userspace about battery, UPS, AC or DC power supply properties
power/
- directory with info on Linux PCI power management.
powerpc/
@ -329,8 +307,6 @@ robust-futexes.txt
- a description of what robust futexes are.
rocket.txt
- info on the Comtrol RocketPort multiport serial driver.
rpc-cache.txt
- introduction to the caching mechanisms in the sunrpc layer.
rt-mutex-design.txt
- description of the RealTime mutex implementation design.
rt-mutex.txt

11
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@ -0,0 +1,11 @@
What: /sys/o2cb symlink
Date: Dec 2005
KernelVersion: 2.6.16
Contact: ocfs2-devel@oss.oracle.com
Description: This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink will
be removed when new versions of ocfs2-tools which know to look
in /sys/fs/o2cb are sufficiently prevalent. Don't code new
software to look here, it should try /sys/fs/o2cb instead.
See Documentation/ABI/stable/o2cb for more information on usage.
Users: ocfs2-tools. It's sufficient to mail proposed changes to
ocfs2-devel@oss.oracle.com.

10
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@ -0,0 +1,10 @@
What: /sys/fs/o2cb/ (was /sys/o2cb)
Date: Dec 2005
KernelVersion: 2.6.16
Contact: ocfs2-devel@oss.oracle.com
Description: Ocfs2-tools looks at 'interface-revision' for versioning
information. Each logmask/ file controls a set of debug prints
and can be written into with the strings "allow", "deny", or
"off". Reading the file returns the current state.
Users: ocfs2-tools. It's sufficient to mail proposed changes to
ocfs2-devel@oss.oracle.com.

11
Documentation/ABI/testing/sysfs-bus-pci Normal file
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@ -0,0 +1,11 @@
What: /sys/bus/pci/devices/.../vpd
Date: February 2008
Contact: Ben Hutchings <bhutchings@solarflare.com>
Description:
A file named vpd in a device directory will be a
binary file containing the Vital Product Data for the
device. It should follow the VPD format defined in
PCI Specification 2.1 or 2.2, but users should consider
that some devices may have malformatted data. If the
underlying VPD has a writable section then the
corresponding section of this file will be writable.

23
Documentation/ABI/testing/sysfs-ibft Normal file
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@ -0,0 +1,23 @@
What: /sys/firmware/ibft/initiator
Date: November 2007
Contact: Konrad Rzeszutek <ketuzsezr@darnok.org>
Description: The /sys/firmware/ibft/initiator directory will contain
files that expose the iSCSI Boot Firmware Table initiator data.
Usually this contains the Initiator name.
What: /sys/firmware/ibft/targetX
Date: November 2007
Contact: Konrad Rzeszutek <ketuzsezr@darnok.org>
Description: The /sys/firmware/ibft/targetX directory will contain
files that expose the iSCSI Boot Firmware Table target data.
Usually this contains the target's IP address, boot LUN,
target name, and what NIC it is associated with. It can also
contain the CHAP name (and password), the reverse CHAP
name (and password)
What: /sys/firmware/ibft/ethernetX
Date: November 2007
Contact: Konrad Rzeszutek <ketuzsezr@darnok.org>
Description: The /sys/firmware/ibft/ethernetX directory will contain
files that expose the iSCSI Boot Firmware Table NIC data.
This can this can the IP address, MAC, and gateway of the NIC.

89
Documentation/ABI/testing/sysfs-ocfs2 Normal file
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@ -0,0 +1,89 @@
What: /sys/fs/ocfs2/
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2 directory contains knobs used by the
ocfs2-tools to interact with the filesystem.
What: /sys/fs/ocfs2/max_locking_protocol
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/max_locking_protocol file displays version
of ocfs2 locking supported by the filesystem. This version
covers how ocfs2 uses distributed locking between cluster
nodes.
The protocol version has a major and minor number. Two
cluster nodes can interoperate if they have an identical
major number and an overlapping minor number - thus,
a node with version 1.10 can interoperate with a node
sporting version 1.8, as long as both use the 1.8 protocol.
Reading from this file returns a single line, the major
number and minor number joined by a period, eg "1.10".
This file is read-only. The value is compiled into the
driver.
What: /sys/fs/ocfs2/loaded_cluster_plugins
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/loaded_cluster_plugins file describes
the available plugins to support ocfs2 cluster operation.
A cluster plugin is required to use ocfs2 in a cluster.
There are currently two available plugins:
* 'o2cb' - The classic o2cb cluster stack that ocfs2 has
used since its inception.
* 'user' - A plugin supporting userspace cluster software
in conjunction with fs/dlm.
Reading from this file returns the names of all loaded
plugins, one per line.
This file is read-only. Its contents may change as
plugins are loaded or removed.
What: /sys/fs/ocfs2/active_cluster_plugin
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/active_cluster_plugin displays which
cluster plugin is currently in use by the filesystem.
The active plugin will appear in the loaded_cluster_plugins
file as well. Only one plugin can be used at a time.
Reading from this file returns the name of the active plugin
on a single line.
This file is read-only. Which plugin is active depends on
the cluster stack in use. The contents may change
when all filesystems are unmounted and the cluster stack
is changed.
What: /sys/fs/ocfs2/cluster_stack
Date: April 2008
Contact: ocfs2-devel@oss.oracle.com
Description:
The /sys/fs/ocfs2/cluster_stack file contains the name
of current ocfs2 cluster stack. This value is set by
userspace tools when bringing the cluster stack online.
Cluster stack names are 4 characters in length.
When the 'o2cb' cluster stack is used, the 'o2cb' cluster
plugin is active. All other cluster stacks use the 'user'
cluster plugin.
Reading from this file returns the name of the current
cluster stack on a single line.
Writing a new stack name to this file changes the current
cluster stack unless there are mounted ocfs2 filesystems.
If there are mounted filesystems, attempts to change the
stack return an error.
Users:
ocfs2-tools <ocfs2-tools-devel@oss.oracle.com>

5
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@ -9,9 +9,10 @@
DOCBOOKS := wanbook.xml z8530book.xml mcabook.xml videobook.xml \
kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
procfs-guide.xml writing_usb_driver.xml networking.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml
genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \
mac80211.xml
###
# The build process is as follows (targets):

7
Documentation/DocBook/kernel-api.tmpl
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@ -297,11 +297,6 @@ X!Earch/x86/kernel/mca_32.c
!Ikernel/acct.c
</chapter>
<chapter id="pmfuncs">
<title>Power Management</title>
!Ekernel/power/pm.c
</chapter>
<chapter id="devdrivers">
<title>Device drivers infrastructure</title>
<sect1><title>Device Drivers Base</title>
@ -361,12 +356,14 @@ X!Edrivers/pnp/system.c
<chapter id="blkdev">
<title>Block Devices</title>
!Eblock/blk-core.c
!Iblock/blk-core.c
!Eblock/blk-map.c
!Iblock/blk-sysfs.c
!Eblock/blk-settings.c
!Eblock/blk-exec.c
!Eblock/blk-barrier.c
!Eblock/blk-tag.c
!Iblock/blk-tag.c
</chapter>
<chapter id="chrdev">

10
Documentation/DocBook/kernel-locking.tmpl
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@ -241,7 +241,7 @@
</para>
<para>
The third type is a semaphore
(<filename class="headerfile">include/asm/semaphore.h</filename>): it
(<filename class="headerfile">include/linux/semaphore.h</filename>): it
can have more than one holder at any time (the number decided at
initialization time), although it is most commonly used as a
single-holder lock (a mutex). If you can't get a semaphore, your
@ -290,7 +290,7 @@
<para>
If you have a data structure which is only ever accessed from
user context, then you can use a simple semaphore
(<filename>linux/asm/semaphore.h</filename>) to protect it. This
(<filename>linux/linux/semaphore.h</filename>) to protect it. This
is the most trivial case: you initialize the semaphore to the number
of resources available (usually 1), and call
<function>down_interruptible()</function> to grab the semaphore, and
@ -854,7 +854,7 @@ The change is shown below, in standard patch format: the
};
-static DEFINE_MUTEX(cache_lock);
+static spinlock_t cache_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(cache_lock);
static LIST_HEAD(cache);
static unsigned int cache_num = 0;
#define MAX_CACHE_SIZE 10
@ -1238,7 +1238,7 @@ Here is the "lock-per-object" implementation:
- int popularity;
};
static spinlock_t cache_lock = SPIN_LOCK_UNLOCKED;
static DEFINE_SPINLOCK(cache_lock);
@@ -77,6 +84,7 @@
obj-&gt;id = id;
obj-&gt;popularity = 0;
@ -1656,7 +1656,7 @@ the amount of locking which needs to be done.
#include &lt;linux/slab.h&gt;
#include &lt;linux/string.h&gt;
+#include &lt;linux/rcupdate.h&gt;
#include &lt;asm/semaphore.h&gt;
#include &lt;linux/semaphore.h&gt;
#include &lt;asm/errno.h&gt;
struct object

447
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@ -0,0 +1,447 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="kgdbOnLinux">
<bookinfo>
<title>Using kgdb and the kgdb Internals</title>
<authorgroup>
<author>
<firstname>Jason</firstname>
<surname>Wessel</surname>
<affiliation>
<address>
<email>jason.wessel@windriver.com</email>
</address>
</affiliation>
</author>
</authorgroup>
<authorgroup>
<author>
<firstname>Tom</firstname>
<surname>Rini</surname>
<affiliation>
<address>
<email>trini@kernel.crashing.org</email>
</address>
</affiliation>
</author>
</authorgroup>
<authorgroup>
<author>
<firstname>Amit S.</firstname>
<surname>Kale</surname>
<affiliation>
<address>
<email>amitkale@linsyssoft.com</email>
</address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2008</year>
<holder>Wind River Systems, Inc.</holder>
</copyright>
<copyright>
<year>2004-2005</year>
<holder>MontaVista Software, Inc.</holder>
</copyright>
<copyright>
<year>2004</year>
<holder>Amit S. Kale</holder>
</copyright>
<legalnotice>
<para>
This file is licensed under the terms of the GNU General Public License
version 2. This program is licensed "as is" without any warranty of any
kind, whether express or implied.
</para>
</legalnotice>
</bookinfo>
<toc></toc>
<chapter id="Introduction">
<title>Introduction</title>
<para>
kgdb is a source level debugger for linux kernel. It is used along
with gdb to debug a linux kernel. The expectation is that gdb can
be used to "break in" to the kernel to inspect memory, variables
and look through a cal stack information similar to what an
application developer would use gdb for. It is possible to place
breakpoints in kernel code and perform some limited execution
stepping.
</para>
<para>
Two machines are required for using kgdb. One of these machines is a
development machine and the other is a test machine. The kernel
to be debugged runs on the test machine. The development machine
runs an instance of gdb against the vmlinux file which contains
the symbols (not boot image such as bzImage, zImage, uImage...).
In gdb the developer specifies the connection parameters and
connects to kgdb. Depending on which kgdb I/O modules exist in
the kernel for a given architecture, it may be possible to debug
the test machine's kernel with the development machine using a
rs232 or ethernet connection.
</para>
</chapter>
<chapter id="CompilingAKernel">
<title>Compiling a kernel</title>
<para>
To enable <symbol>CONFIG_KGDB</symbol>, look under the "Kernel debugging"
and then select "KGDB: kernel debugging with remote gdb".
</para>
<para>
Next you should choose one of more I/O drivers to interconnect debugging
host and debugged target. Early boot debugging requires a KGDB
I/O driver that supports early debugging and the driver must be
built into the kernel directly. Kgdb I/O driver configuration
takes place via kernel or module parameters, see following
chapter.
</para>
<para>
The kgdb test compile options are described in the kgdb test suite chapter.
</para>
</chapter>
<chapter id="EnableKGDB">
<title>Enable kgdb for debugging</title>
<para>
In order to use kgdb you must activate it by passing configuration
information to one of the kgdb I/O drivers. If you do not pass any
configuration information kgdb will not do anything at all. Kgdb
will only actively hook up to the kernel trap hooks if a kgdb I/O
driver is loaded and configured. If you unconfigure a kgdb I/O
driver, kgdb will unregister all the kernel hook points.
</para>
<para>
All drivers can be reconfigured at run time, if
<symbol>CONFIG_SYSFS</symbol> and <symbol>CONFIG_MODULES</symbol>
are enabled, by echo'ing a new config string to
<constant>/sys/module/&lt;driver&gt;/parameter/&lt;option&gt;</constant>.
The driver can be unconfigured by passing an empty string. You cannot
change the configuration while the debugger is attached. Make sure
to detach the debugger with the <constant>detach</constant> command
prior to trying unconfigure a kgdb I/O driver.
</para>
<sect1 id="kgdbwait">
<title>Kernel parameter: kgdbwait</title>
<para>
The Kernel command line option <constant>kgdbwait</constant> makes
kgdb wait for a debugger connection during booting of a kernel. You
can only use this option you compiled a kgdb I/O driver into the
kernel and you specified the I/O driver configuration as a kernel
command line option. The kgdbwait parameter should always follow the
configuration parameter for the kgdb I/O driver in the kernel
command line else the I/O driver will not be configured prior to
asking the kernel to use it to wait.
</para>
<para>
The kernel will stop and wait as early as the I/O driver and
architecture will allow when you use this option. If you build the
kgdb I/O driver as a kernel module kgdbwait will not do anything.
</para>
</sect1>
<sect1 id="kgdboc">
<title>Kernel parameter: kgdboc</title>
<para>
The kgdboc driver was originally an abbreviation meant to stand for
"kgdb over console". Kgdboc is designed to work with a single
serial port. It was meant to cover the circumstance
where you wanted to use a serial console as your primary console as
well as using it to perform kernel debugging. Of course you can
also use kgdboc without assigning a console to the same port.
</para>
<sect2 id="UsingKgdboc">
<title>Using kgdboc</title>
<para>
You can configure kgdboc via sysfs or a module or kernel boot line
parameter depending on if you build with CONFIG_KGDBOC as a module
or built-in.
<orderedlist>
<listitem><para>From the module load or build-in</para>
<para><constant>kgdboc=&lt;tty-device&gt;,[baud]</constant></para>
<para>
The example here would be if your console port was typically ttyS0, you would use something like <constant>kgdboc=ttyS0,115200</constant> or on the ARM Versatile AB you would likely use <constant>kgdboc=ttyAMA0,115200</constant>
</para>
</listitem>
<listitem><para>From sysfs</para>
<para><constant>echo ttyS0 &gt; /sys/module/kgdboc/parameters/kgdboc</constant></para>
</listitem>
</orderedlist>
</para>
<para>
NOTE: Kgdboc does not support interrupting the target via the
gdb remote protocol. You must manually send a sysrq-g unless you
have a proxy that splits console output to a terminal problem and
has a separate port for the debugger to connect to that sends the
sysrq-g for you.
</para>
<para>When using kgdboc with no debugger proxy, you can end up
connecting the debugger for one of two entry points. If an
exception occurs after you have loaded kgdboc a message should print
on the console stating it is waiting for the debugger. In case you
disconnect your terminal program and then connect the debugger in
its place. If you want to interrupt the target system and forcibly
enter a debug session you have to issue a Sysrq sequence and then
type the letter <constant>g</constant>. Then you disconnect the
terminal session and connect gdb. Your options if you don't like
this are to hack gdb to send the sysrq-g for you as well as on the
initial connect, or to use a debugger proxy that allows an
unmodified gdb to do the debugging.
</para>
</sect2>
</sect1>
<sect1 id="kgdbcon">
<title>Kernel parameter: kgdbcon</title>
<para>
Kgdb supports using the gdb serial protocol to send console messages
to the debugger when the debugger is connected and running. There
are two ways to activate this feature.
<orderedlist>
<listitem><para>Activate with the kernel command line option:</para>
<para><constant>kgdbcon</constant></para>
</listitem>
<listitem><para>Use sysfs before configuring an io driver</para>
<para>
<constant>echo 1 &gt; /sys/module/kgdb/parameters/kgdb_use_con</constant>
</para>
<para>
NOTE: If you do this after you configure the kgdb I/O driver, the
setting will not take effect until the next point the I/O is
reconfigured.
</para>
</listitem>
</orderedlist>
</para>
<para>
IMPORTANT NOTE: Using this option with kgdb over the console
(kgdboc) or kgdb over ethernet (kgdboe) is not supported.
</para>
</sect1>
</chapter>
<chapter id="ConnectingGDB">
<title>Connecting gdb</title>
<para>
If you are using kgdboc, you need to have used kgdbwait as a boot
argument, issued a sysrq-g, or the system you are going to debug
has already taken an exception and is waiting for the debugger to
attach before you can connect gdb.
</para>
<para>
If you are not using different kgdb I/O driver other than kgdboc,
you should be able to connect and the target will automatically
respond.
</para>
<para>
Example (using a serial port):
</para>
<programlisting>
% gdb ./vmlinux
(gdb) set remotebaud 115200
(gdb) target remote /dev/ttyS0
</programlisting>
<para>
Example (kgdb to a terminal server):
</para>
<programlisting>
% gdb ./vmlinux
(gdb) target remote udp:192.168.2.2:6443
</programlisting>
<para>
Example (kgdb over ethernet):
</para>
<programlisting>
% gdb ./vmlinux
(gdb) target remote udp:192.168.2.2:6443
</programlisting>
<para>
Once connected, you can debug a kernel the way you would debug an
application program.
</para>
<para>
If you are having problems connecting or something is going
seriously wrong while debugging, it will most often be the case
that you want to enable gdb to be verbose about its target
communications. You do this prior to issuing the <constant>target
remote</constant> command by typing in: <constant>set remote debug 1</constant>
</para>
</chapter>
<chapter id="KGDBTestSuite">
<title>kgdb Test Suite</title>
<para>
When kgdb is enabled in the kernel config you can also elect to
enable the config parameter KGDB_TESTS. Turning this on will
enable a special kgdb I/O module which is designed to test the
kgdb internal functions.
</para>
<para>
The kgdb tests are mainly intended for developers to test the kgdb
internals as well as a tool for developing a new kgdb architecture
specific implementation. These tests are not really for end users
of the Linux kernel. The primary source of documentation would be
to look in the drivers/misc/kgdbts.c file.
</para>
<para>
The kgdb test suite can also be configured at compile time to run
the core set of tests by setting the kernel config parameter
KGDB_TESTS_ON_BOOT. This particular option is aimed at automated
regression testing and does not require modifying the kernel boot
config arguments. If this is turned on, the kgdb test suite can
be disabled by specifying "kgdbts=" as a kernel boot argument.
</para>
</chapter>
<chapter id="CommonBackEndReq">
<title>KGDB Internals</title>
<sect1 id="kgdbArchitecture">
<title>Architecture Specifics</title>
<para>
Kgdb is organized into three basic components:
<orderedlist>
<listitem><para>kgdb core</para>
<para>
The kgdb core is found in kernel/kgdb.c. It contains:
<itemizedlist>
<listitem><para>All the logic to implement the gdb serial protocol</para></listitem>
<listitem><para>A generic OS exception handler which includes sync'ing the processors into a stopped state on an multi cpu system.</para></listitem>
<listitem><para>The API to talk to the kgdb I/O drivers</para></listitem>
<listitem><para>The API to make calls to the arch specific kgdb implementation</para></listitem>
<listitem><para>The logic to perform safe memory reads and writes to memory while using the debugger</para></listitem>
<listitem><para>A full implementation for software breakpoints unless overridden by the arch</para></listitem>
</itemizedlist>
</para>
</listitem>
<listitem><para>kgdb arch specific implementation</para>
<para>
This implementation is generally found in arch/*/kernel/kgdb.c.
As an example, arch/x86/kernel/kgdb.c contains the specifics to
implement HW breakpoint as well as the initialization to
dynamically register and unregister for the trap handlers on
this architecture. The arch specific portion implements:
<itemizedlist>
<listitem><para>contains an arch specific trap catcher which
invokes kgdb_handle_exception() to start kgdb about doing its
work</para></listitem>
<listitem><para>translation to and from gdb specific packet format to pt_regs</para></listitem>
<listitem><para>Registration and unregistration of architecture specific trap hooks</para></listitem>
<listitem><para>Any special exception handling and cleanup</para></listitem>
<listitem><para>NMI exception handling and cleanup</para></listitem>
<listitem><para>(optional)HW breakpoints</para></listitem>
</itemizedlist>
</para>
</listitem>
<listitem><para>kgdb I/O driver</para>
<para>
Each kgdb I/O driver has to provide an implemenation for the following:
<itemizedlist>
<listitem><para>configuration via builtin or module</para></listitem>
<listitem><para>dynamic configuration and kgdb hook registration calls</para></listitem>
<listitem><para>read and write character interface</para></listitem>
<listitem><para>A cleanup handler for unconfiguring from the kgdb core</para></listitem>
<listitem><para>(optional) Early debug methodology</para></listitem>
</itemizedlist>
Any given kgdb I/O driver has to operate very closely with the
hardware and must do it in such a way that does not enable
interrupts or change other parts of the system context without
completely restoring them. The kgdb core will repeatedly "poll"
a kgdb I/O driver for characters when it needs input. The I/O
driver is expected to return immediately if there is no data
available. Doing so allows for the future possibility to touch
watch dog hardware in such a way as to have a target system not
reset when these are enabled.
</para>
</listitem>
</orderedlist>
</para>
<para>
If you are intent on adding kgdb architecture specific support
for a new architecture, the architecture should define
<constant>HAVE_ARCH_KGDB</constant> in the architecture specific
Kconfig file. This will enable kgdb for the architecture, and
at that point you must create an architecture specific kgdb
implementation.
</para>
<para>
There are a few flags which must be set on every architecture in
their &lt;asm/kgdb.h&gt; file. These are:
<itemizedlist>
<listitem>
<para>
NUMREGBYTES: The size in bytes of all of the registers, so
that we can ensure they will all fit into a packet.
</para>
<para>
BUFMAX: The size in bytes of the buffer GDB will read into.
This must be larger than NUMREGBYTES.
</para>
<para>
CACHE_FLUSH_IS_SAFE: Set to 1 if it is always safe to call
flush_cache_range or flush_icache_range. On some architectures,
these functions may not be safe to call on SMP since we keep other
CPUs in a holding pattern.
</para>
</listitem>
</itemizedlist>
</para>
<para>
There are also the following functions for the common backend,
found in kernel/kgdb.c, that must be supplied by the
architecture-specific backend unless marked as (optional), in
which case a default function maybe used if the architecture
does not need to provide a specific implementation.
</para>
!Iinclude/linux/kgdb.h
</sect1>
<sect1 id="kgdbocDesign">
<title>kgdboc internals</title>
<para>
The kgdboc driver is actually a very thin driver that relies on the
underlying low level to the hardware driver having "polling hooks"
which the to which the tty driver is attached. In the initial
implementation of kgdboc it the serial_core was changed to expose a
low level uart hook for doing polled mode reading and writing of a
single character while in an atomic context. When kgdb makes an I/O
request to the debugger, kgdboc invokes a call back in the serial
core which in turn uses the call back in the uart driver. It is
certainly possible to extend kgdboc to work with non-uart based
consoles in the future.
</para>
<para>
When using kgdboc with a uart, the uart driver must implement two callbacks in the <constant>struct uart_ops</constant>. Example from drivers/8250.c:<programlisting>
#ifdef CONFIG_CONSOLE_POLL
.poll_get_char = serial8250_get_poll_char,
.poll_put_char = serial8250_put_poll_char,
#endif
</programlisting>
Any implementation specifics around creating a polling driver use the
<constant>#ifdef CONFIG_CONSOLE_POLL</constant>, as shown above.
Keep in mind that polling hooks have to be implemented in such a way
that they can be called from an atomic context and have to restore
the state of the uart chip on return such that the system can return
to normal when the debugger detaches. You need to be very careful
with any kind of lock you consider, because failing here is most
going to mean pressing the reset button.
</para>
</sect1>
</chapter>
<chapter id="credits">
<title>Credits</title>
<para>
The following people have contributed to this document:
<orderedlist>
<listitem><para>Amit Kale<email>amitkale@linsyssoft.com</email></para></listitem>
<listitem><para>Tom Rini<email>trini@kernel.crashing.org</email></para></listitem>
</orderedlist>
In March 2008 this document was completely rewritten by:
<itemizedlist>
<listitem><para>Jason Wessel<email>jason.wessel@windriver.com</email></para></listitem>
</itemizedlist>
</para>
</chapter>
</book>

335
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@ -0,0 +1,335 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="mac80211-developers-guide">
<bookinfo>
<title>The mac80211 subsystem for kernel developers</title>
<authorgroup>
<author>
<firstname>Johannes</firstname>
<surname>Berg</surname>
<affiliation>
<address><email>johannes@sipsolutions.net</email></address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2007</year>
<year>2008</year>
<holder>Johannes Berg</holder>
</copyright>
<legalnotice>
<para>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License version 2 as published by the Free Software Foundation.
</para>
<para>
This documentation is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
</para>
<para>
You should have received a copy of the GNU General Public
License along with this documentation; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
</para>
<para>
For more details see the file COPYING in the source
distribution of Linux.
</para>
</legalnotice>
<abstract>
!Pinclude/net/mac80211.h Introduction
!Pinclude/net/mac80211.h Warning
</abstract>
</bookinfo>
<toc></toc>
<!--
Generally, this document shall be ordered by increasing complexity.
It is important to note that readers should be able to read only
the first few sections to get a working driver and only advanced
usage should require reading the full document.
-->
<part>
<title>The basic mac80211 driver interface</title>
<partintro>
<para>
You should read and understand the information contained
within this part of the book while implementing a driver.
In some chapters, advanced usage is noted, that may be
skipped at first.
</para>
<para>
This part of the book only covers station and monitor mode
functionality, additional information required to implement
the other modes is covered in the second part of the book.
</para>
</partintro>
<chapter id="basics">
<title>Basic hardware handling</title>
<para>TBD</para>
<para>
This chapter shall contain information on getting a hw
struct allocated and registered with mac80211.
</para>
<para>
Since it is required to allocate rates/modes before registering
a hw struct, this chapter shall also contain information on setting
up the rate/mode structs.
</para>
<para>
Additionally, some discussion about the callbacks and
the general programming model should be in here, including
the definition of ieee80211_ops which will be referred to
a lot.
</para>
<para>
Finally, a discussion of hardware capabilities should be done
with references to other parts of the book.
</para>
<!-- intentionally multiple !F lines to get proper order -->
!Finclude/net/mac80211.h ieee80211_hw
!Finclude/net/mac80211.h ieee80211_hw_flags
!Finclude/net/mac80211.h SET_IEEE80211_DEV
!Finclude/net/mac80211.h SET_IEEE80211_PERM_ADDR
!Finclude/net/mac80211.h ieee80211_ops
!Finclude/net/mac80211.h ieee80211_alloc_hw
!Finclude/net/mac80211.h ieee80211_register_hw
!Finclude/net/mac80211.h ieee80211_get_tx_led_name
!Finclude/net/mac80211.h ieee80211_get_rx_led_name
!Finclude/net/mac80211.h ieee80211_get_assoc_led_name
!Finclude/net/mac80211.h ieee80211_get_radio_led_name
!Finclude/net/mac80211.h ieee80211_unregister_hw
!Finclude/net/mac80211.h ieee80211_free_hw
</chapter>
<chapter id="phy-handling">
<title>PHY configuration</title>
<para>TBD</para>
<para>
This chapter should describe PHY handling including
start/stop callbacks and the various structures used.
</para>
!Finclude/net/mac80211.h ieee80211_conf
!Finclude/net/mac80211.h ieee80211_conf_flags
</chapter>
<chapter id="iface-handling">
<title>Virtual interfaces</title>
<para>TBD</para>
<para>
This chapter should describe virtual interface basics
that are relevant to the driver (VLANs, MGMT etc are not.)
It should explain the use of the add_iface/remove_iface
callbacks as well as the interface configuration callbacks.
</para>
<para>Things related to AP mode should be discussed there.</para>
<para>
Things related to supporting multiple interfaces should be
in the appropriate chapter, a BIG FAT note should be here about
this though and the recommendation to allow only a single
interface in STA mode at first!
</para>
!Finclude/net/mac80211.h ieee80211_if_types
!Finclude/net/mac80211.h ieee80211_if_init_conf
!Finclude/net/mac80211.h ieee80211_if_conf
</chapter>
<chapter id="rx-tx">
<title>Receive and transmit processing</title>
<sect1>
<title>what should be here</title>
<para>TBD</para>
<para>
This should describe the receive and transmit
paths in mac80211/the drivers as well as
transmit status handling.
</para>
</sect1>
<sect1>
<title>Frame format</title>
!Pinclude/net/mac80211.h Frame format
</sect1>
<sect1>
<title>Alignment issues</title>
<para>TBD</para>
</sect1>
<sect1>
<title>Calling into mac80211 from interrupts</title>
!Pinclude/net/mac80211.h Calling mac80211 from interrupts
</sect1>
<sect1>
<title>functions/definitions</title>
!Finclude/net/mac80211.h ieee80211_rx_status
!Finclude/net/mac80211.h mac80211_rx_flags
!Finclude/net/mac80211.h ieee80211_tx_control
!Finclude/net/mac80211.h ieee80211_tx_status_flags
!Finclude/net/mac80211.h ieee80211_rx
!Finclude/net/mac80211.h ieee80211_rx_irqsafe
!Finclude/net/mac80211.h ieee80211_tx_status
!Finclude/net/mac80211.h ieee80211_tx_status_irqsafe
!Finclude/net/mac80211.h ieee80211_rts_get
!Finclude/net/mac80211.h ieee80211_rts_duration
!Finclude/net/mac80211.h ieee80211_ctstoself_get
!Finclude/net/mac80211.h ieee80211_ctstoself_duration
!Finclude/net/mac80211.h ieee80211_generic_frame_duration
!Finclude/net/mac80211.h ieee80211_get_hdrlen_from_skb
!Finclude/net/mac80211.h ieee80211_get_hdrlen
!Finclude/net/mac80211.h ieee80211_wake_queue
!Finclude/net/mac80211.h ieee80211_stop_queue
!Finclude/net/mac80211.h ieee80211_start_queues
!Finclude/net/mac80211.h ieee80211_stop_queues
!Finclude/net/mac80211.h ieee80211_wake_queues
</sect1>
</chapter>
<chapter id="filters">
<title>Frame filtering</title>
!Pinclude/net/mac80211.h Frame filtering
!Finclude/net/mac80211.h ieee80211_filter_flags
</chapter>
</part>
<part id="advanced">
<title>Advanced driver interface</title>
<partintro>
<para>
Information contained within this part of the book is
of interest only for advanced interaction of mac80211
with drivers to exploit more hardware capabilities and
improve performance.
</para>
</partintro>
<chapter id="hardware-crypto-offload">
<title>Hardware crypto acceleration</title>
!Pinclude/net/mac80211.h Hardware crypto acceleration
<!-- intentionally multiple !F lines to get proper order -->
!Finclude/net/mac80211.h set_key_cmd
!Finclude/net/mac80211.h ieee80211_key_conf
!Finclude/net/mac80211.h ieee80211_key_alg
!Finclude/net/mac80211.h ieee80211_key_flags
</chapter>
<chapter id="qos">
<title>Multiple queues and QoS support</title>
<para>TBD</para>
!Finclude/net/mac80211.h ieee80211_tx_queue_params
!Finclude/net/mac80211.h ieee80211_tx_queue_stats_data
!Finclude/net/mac80211.h ieee80211_tx_queue
</chapter>
<chapter id="AP">
<title>Access point mode support</title>
<para>TBD</para>
<para>Some parts of the if_conf should be discussed here instead</para>
<para>
Insert notes about VLAN interfaces with hw crypto here or
in the hw crypto chapter.
</para>
!Finclude/net/mac80211.h ieee80211_get_buffered_bc
!Finclude/net/mac80211.h ieee80211_beacon_get
</chapter>
<chapter id="multi-iface">
<title>Supporting multiple virtual interfaces</title>
<para>TBD</para>
<para>
Note: WDS with identical MAC address should almost always be OK
</para>
<para>
Insert notes about having multiple virtual interfaces with
different MAC addresses here, note which configurations are
supported by mac80211, add notes about supporting hw crypto
with it.
</para>
</chapter>
<chapter id="hardware-scan-offload">
<title>Hardware scan offload</title>
<para>TBD</para>
!Finclude/net/mac80211.h ieee80211_scan_completed
</chapter>
</part>
<part id="rate-control">
<title>Rate control interface</title>
<partintro>
<para>TBD</para>
<para>
This part of the book describes the rate control algorithm
interface and how it relates to mac80211 and drivers.
</para>
</partintro>
<chapter id="dummy">
<title>dummy chapter</title>
<para>TBD</para>
</chapter>
</part>
<part id="internal">
<title>Internals</title>
<partintro>
<para>TBD</para>
<para>
This part of the book describes mac80211 internals.
</para>
</partintro>
<chapter id="key-handling">
<title>Key handling</title>
<sect1>
<title>Key handling basics</title>
!Pnet/mac80211/key.c Key handling basics
</sect1>
<sect1>
<title>MORE TBD</title>
<para>TBD</para>
</sect1>
</chapter>
<chapter id="rx-processing">
<title>Receive processing</title>
<para>TBD</para>
</chapter>
<chapter id="tx-processing">
<title>Transmit processing</title>
<para>TBD</para>
</chapter>
<chapter id="sta-info">
<title>Station info handling</title>
<sect1>
<title>Programming information</title>
!Fnet/mac80211/sta_info.h sta_info
!Fnet/mac80211/sta_info.h ieee80211_sta_info_flags
</sect1>
<sect1>
<title>STA information lifetime rules</title>
!Pnet/mac80211/sta_info.c STA information lifetime rules
</sect1>
</chapter>
<chapter id="synchronisation">
<title>Synchronisation</title>
<para>TBD</para>
<para>Locking, lots of RCU</para>
</chapter>
</part>
</book>

14
Documentation/DocBook/writing_usb_driver.tmpl
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@ -100,8 +100,8 @@
useful documents, at the USB home page (see Resources). An excellent
introduction to the Linux USB subsystem can be found at the USB Working
Devices List (see Resources). It explains how the Linux USB subsystem is
structured and introduces the reader to the concept of USB urbs, which
are essential to USB drivers.
structured and introduces the reader to the concept of USB urbs
(USB Request Blocks), which are essential to USB drivers.
</para>
<para>
The first thing a Linux USB driver needs to do is register itself with
@ -162,8 +162,8 @@ static int __init usb_skel_init(void)
module_init(usb_skel_init);
</programlisting>
<para>
When the driver is unloaded from the system, it needs to unregister
itself with the USB subsystem. This is done with the usb_unregister
When the driver is unloaded from the system, it needs to deregister
itself with the USB subsystem. This is done with the usb_deregister
function:
</para>
<programlisting>
@ -232,7 +232,7 @@ static int skel_probe(struct usb_interface *interface,
were passed to the USB subsystem will be called from a user program trying
to talk to the device. The first function called will be open, as the
program tries to open the device for I/O. We increment our private usage
count and save off a pointer to our internal structure in the file
count and save a pointer to our internal structure in the file
structure. This is done so that future calls to file operations will
enable the driver to determine which device the user is addressing. All
of this is done with the following code:
@ -252,8 +252,8 @@ file->private_data = dev;
send to the device based on the size of the write urb it has created (this
size depends on the size of the bulk out end point that the device has).
Then it copies the data from user space to kernel space, points the urb to
the data and submits the urb to the USB subsystem. This can be shown in
he following code:
the data and submits the urb to the USB subsystem. This can be seen in
the following code:
</para>
<programlisting>
/* we can only write as much as 1 urb will hold */

12
Documentation/PCI/00-INDEX Normal file
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@ -0,0 +1,12 @@
00-INDEX
- this file
PCI-DMA-mapping.txt
- info for PCI drivers using DMA portably across all platforms
PCIEBUS-HOWTO.txt
- a guide describing the PCI Express Port Bus driver
pci-error-recovery.txt
- info on PCI error recovery
pci.txt
- info on the PCI subsystem for device driver authors
pcieaer-howto.txt
- the PCI Express Advanced Error Reporting Driver Guide HOWTO

0
Documentation/PCIEBUS-HOWTO.txt → Documentation/PCI/PCIEBUS-HOWTO.txt
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0
Documentation/pci-error-recovery.txt → Documentation/PCI/pci-error-recovery.txt
Просмотреть файл

8
Documentation/pci.txt → Documentation/PCI/pci.txt
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@ -119,11 +119,12 @@ initialization with a pointer to a structure describing the driver
the power state of a device before reboot.
e.g. drivers/net/e100.c.
err_handler See Documentation/pci-error-recovery.txt
err_handler See Documentation/PCI/pci-error-recovery.txt
The ID table is an array of struct pci_device_id entries ending with an
all-zero entry. Each entry consists of:
all-zero entry; use of the macro DEFINE_PCI_DEVICE_TABLE is the preferred
method of declaring the table. Each entry consists of:
vendor,device Vendor and device ID to match (or PCI_ANY_ID)
@ -191,7 +192,8 @@ Tips on when/where to use the above attributes:
o Do not mark the struct pci_driver.
o The ID table array should be marked __devinitdata.
o The ID table array should be marked __devinitconst; this is done
automatically if the table is declared with DEFINE_PCI_DEVICE_TABLE().
o The probe() and remove() functions should be marked __devinit
and __devexit respectively. All initialization functions

2
Documentation/pcieaer-howto.txt → Documentation/PCI/pcieaer-howto.txt
Просмотреть файл

@ -13,7 +13,7 @@ Reporting (AER) driver and provides information on how to use it, as
well as how to enable the drivers of endpoint devices to conform with
PCI Express AER driver.
1.2 Copyright © Intel Corporation 2006.
1.2 Copyright © Intel Corporation 2006.
1.3 What is the PCI Express AER Driver?

58
Documentation/SubmittingPatches
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@ -183,7 +183,7 @@ Even if the maintainer did not respond in step #4, make sure to ALWAYS
copy the maintainer when you change their code.
For small patches you may want to CC the Trivial Patch Monkey
trivial@kernel.org managed by Adrian Bunk; which collects "trivial"
trivial@kernel.org managed by Jesper Juhl; which collects "trivial"
patches. Trivial patches must qualify for one of the following rules:
Spelling fixes in documentation
Spelling fixes which could break grep(1)
@ -196,7 +196,7 @@ patches. Trivial patches must qualify for one of the following rules:
since people copy, as long as it's trivial)
Any fix by the author/maintainer of the file (ie. patch monkey
in re-transmission mode)
URL: <http://www.kernel.org/pub/linux/kernel/people/bunk/trivial/>
URL: <http://www.kernel.org/pub/linux/kernel/people/juhl/trivial/>
@ -328,7 +328,7 @@ now, but you can do this to mark internal company procedures or just
point out some special detail about the sign-off.
13) When to use Acked-by:
13) When to use Acked-by: and Cc:
The Signed-off-by: tag indicates that the signer was involved in the
development of the patch, or that he/she was in the patch's delivery path.
@ -352,8 +352,56 @@ the part which affects that maintainer's code. Judgement should be used here.
When in doubt people should refer to the original discussion in the mailing
list archives.
If a person has had the opportunity to comment on a patch, but has not
provided such comments, you may optionally add a "Cc:" tag to the patch.
This is the only tag which might be added without an explicit action by the
person it names. This tag documents that potentially interested parties
have been included in the discussion
14) The canonical patch format
14) Using Test-by: and Reviewed-by:
A Tested-by: tag indicates that the patch has been successfully tested (in
some environment) by the person named. This tag informs maintainers that
some testing has been performed, provides a means to locate testers for
future patches, and ensures credit for the testers.
Reviewed-by:, instead, indicates that the patch has been reviewed and found
acceptable according to the Reviewer's Statement:
Reviewer's statement of oversight
By offering my Reviewed-by: tag, I state that:
(a) I have carried out a technical review of this patch to
evaluate its appropriateness and readiness for inclusion into
the mainline kernel.
(b) Any problems, concerns, or questions relating to the patch
have been communicated back to the submitter. I am satisfied
with the submitter's response to my comments.
(c) While there may be things that could be improved with this
submission, I believe that it is, at this time, (1) a
worthwhile modification to the kernel, and (2) free of known
issues which would argue against its inclusion.
(d) While I have reviewed the patch and believe it to be sound, I
do not (unless explicitly stated elsewhere) make any
warranties or guarantees that it will achieve its stated
purpose or function properly in any given situation.
A Reviewed-by tag is a statement of opinion that the patch is an
appropriate modification of the kernel without any remaining serious
technical issues. Any interested reviewer (who has done the work) can
offer a Reviewed-by tag for a patch. This tag serves to give credit to
reviewers and to inform maintainers of the degree of review which has been
done on the patch. Reviewed-by: tags, when supplied by reviewers known to
understand the subject area and to perform thorough reviews, will normally
increase the liklihood of your patch getting into the kernel.
15) The canonical patch format
The canonical patch subject line is:
@ -512,7 +560,7 @@ They provide type safety, have no length limitations, no formatting
limitations, and under gcc they are as cheap as macros.
Macros should only be used for cases where a static inline is clearly
suboptimal [there a few, isolated cases of this in fast paths],
suboptimal [there are a few, isolated cases of this in fast paths],
or where it is impossible to use a static inline function [such as
string-izing].

12
Documentation/acpi/dsdt-override.txt
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@ -1,15 +1,7 @@
Linux supports two methods of overriding the BIOS DSDT:
Linux supports a method of overriding the BIOS DSDT:
CONFIG_ACPI_CUSTOM_DSDT builds the image into the kernel.
CONFIG_ACPI_CUSTOM_DSDT_INITRD adds the image to the initrd.
When to use these methods is described in detail on the
When to use this method is described in detail on the
Linux/ACPI home page:
http://www.lesswatts.org/projects/acpi/overridingDSDT.php
Note that if both options are used, the DSDT supplied
by the INITRD method takes precedence.
Documentation/initramfs-add-dsdt.sh is provided for convenience
for use with the CONFIG_ACPI_CUSTOM_DSDT_INITRD method.

43
Documentation/acpi/initramfs-add-dsdt.sh
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@ -1,43 +0,0 @@
#!/bin/bash
# Adds a DSDT file to the initrd (if it's an initramfs)
# first argument is the name of archive
# second argument is the name of the file to add
# The file will be copied as /DSDT.aml
# 20060126: fix "Premature end of file" with some old cpio (Roland Robic)
# 20060205: this time it should really work
# check the arguments
if [ $# -ne 2 ]; then
program_name=$(basename $0)
echo "\
$program_name: too few arguments
Usage: $program_name initrd-name.img DSDT-to-add.aml
Adds a DSDT file to an initrd (in initramfs format)
initrd-name.img: filename of the initrd in initramfs format
DSDT-to-add.aml: filename of the DSDT file to add
" 1>&2
exit 1
fi
# we should check it's an initramfs
tempcpio=$(mktemp -d)
# cleanup on exit, hangup, interrupt, quit, termination
trap 'rm -rf $tempcpio' 0 1 2 3 15
# extract the archive
gunzip -c "$1" > "$tempcpio"/initramfs.cpio || exit 1
# copy the DSDT file at the root of the directory so that we can call it "/DSDT.aml"
cp -f "$2" "$tempcpio"/DSDT.aml
# add the file
cd "$tempcpio"
(echo DSDT.aml | cpio --quiet -H newc -o -A -O "$tempcpio"/initramfs.cpio) || exit 1
cd "$OLDPWD"
# re-compress the archive
gzip -c "$tempcpio"/initramfs.cpio > "$1"

3
Documentation/atomic_ops.txt
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@ -186,7 +186,8 @@ If the atomic value v is not equal to u, this function adds a to v, and
returns non zero. If v is equal to u then it returns zero. This is done as
an atomic operation.
atomic_add_unless requires explicit memory barriers around the operation.
atomic_add_unless requires explicit memory barriers around the operation
unless it fails (returns 0).
atomic_inc_not_zero, equivalent to atomic_add_unless(v, 1, 0)

2
Documentation/block/biodoc.txt
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@ -1097,7 +1097,7 @@ lock themselves, if required. Drivers that explicitly used the
io_request_lock for serialization need to be modified accordingly.
Usually it's as easy as adding a global lock:
static spinlock_t my_driver_lock = SPIN_LOCK_UNLOCKED;
static DEFINE_SPINLOCK(my_driver_lock);
and passing the address to that lock to blk_init_queue().

2
Documentation/cdrom/cdrom-standard.tex
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@ -777,7 +777,7 @@ Note that a driver must have one static structure, $<device>_dops$, while
it may have as many structures $<device>_info$ as there are minor devices
active. $Register_cdrom()$ builds a linked list from these.
\subsection{$Int\ unregister_cdrom(struct\ cdrom_device_info * cdi)$}
\subsection{$Void\ unregister_cdrom(struct\ cdrom_device_info * cdi)$}
Unregistering device $cdi$ with minor number $MINOR(cdi\to dev)$ removes
the minor device from the list. If it was the last registered minor for

18
Documentation/cdrom/ide-cd
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@ -45,7 +45,7 @@ This driver provides the following features:
---------------
0. The ide-cd relies on the ide disk driver. See
Documentation/ide.txt for up-to-date information on the ide
Documentation/ide/ide.txt for up-to-date information on the ide
driver.
1. Make sure that the ide and ide-cd drivers are compiled into the
@ -64,7 +64,7 @@ This driver provides the following features:
Depending on what type of IDE interface you have, you may need to
specify additional configuration options. See
Documentation/ide.txt.
Documentation/ide/ide.txt.
2. You should also ensure that the iso9660 filesystem is either
compiled into the kernel or available as a loadable module. You
@ -84,7 +84,7 @@ This driver provides the following features:
on the primary IDE interface are called `hda' and `hdb',
respectively. The drives on the secondary interface are called
`hdc' and `hdd'. (Interfaces at other locations get other letters
in the third position; see Documentation/ide.txt.)
in the third position; see Documentation/ide/ide.txt.)
If you want your CDROM drive to be found automatically by the
driver, you should make sure your IDE interface uses either the
@ -93,7 +93,7 @@ This driver provides the following features:
be jumpered as `master'. (If for some reason you cannot configure
your system in this manner, you can probably still use the driver.
You may have to pass extra configuration information to the kernel
when you boot, however. See Documentation/ide.txt for more
when you boot, however. See Documentation/ide/ide.txt for more
information.)
4. Boot the system. If the drive is recognized, you should see a
@ -201,7 +201,7 @@ TEST
This section discusses some common problems encountered when trying to
use the driver, and some possible solutions. Note that if you are
experiencing problems, you should probably also review
Documentation/ide.txt for current information about the underlying
Documentation/ide/ide.txt for current information about the underlying
IDE support code. Some of these items apply only to earlier versions
of the driver, but are mentioned here for completeness.
@ -211,7 +211,7 @@ from the driver.
a. Drive is not detected during booting.
- Review the configuration instructions above and in
Documentation/ide.txt, and check how your hardware is
Documentation/ide/ide.txt, and check how your hardware is
configured.
- If your drive is the only device on an IDE interface, it should
@ -219,7 +219,7 @@ a. Drive is not detected during booting.
- If your IDE interface is not at the standard addresses of 0x170
or 0x1f0, you'll need to explicitly inform the driver using a
lilo option. See Documentation/ide.txt. (This feature was
lilo option. See Documentation/ide/ide.txt. (This feature was
added around kernel version 1.3.30.)
- If the autoprobing is not finding your drive, you can tell the
@ -245,7 +245,7 @@ a. Drive is not detected during booting.
Support for some interfaces needing extra initialization is
provided in later 1.3.x kernels. You may need to turn on
additional kernel configuration options to get them to work;
see Documentation/ide.txt.
see Documentation/ide/ide.txt.
Even if support is not available for your interface, you may be
able to get it to work with the following procedure. First boot
@ -299,7 +299,7 @@ c. System hangups.
be worked around by specifying the `serialize' option when
booting. Recent kernels should be able to detect the need for
this automatically in most cases, but the detection is not
foolproof. See Documentation/ide.txt for more information
foolproof. See Documentation/ide/ide.txt for more information
about the `serialize' option and the CMD640B.
- Note that many MS-DOS CDROM drivers will work with such buggy

66
Documentation/cgroups.txt
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@ -28,7 +28,7 @@ CONTENTS:
4. Questions
1. Control Groups
==========
=================
1.1 What are cgroups ?
----------------------
@ -143,10 +143,10 @@ proliferation of such cgroups.
Also lets say that the administrator would like to give enhanced network
access temporarily to a student's browser (since it is night and the user
wants to do online gaming :) OR give one of the students simulation
wants to do online gaming :)) OR give one of the students simulation
apps enhanced CPU power,
With ability to write pids directly to resource classes, its just a
With ability to write pids directly to resource classes, it's just a
matter of :
# echo pid > /mnt/network/<new_class>/tasks
@ -227,10 +227,13 @@ Each cgroup is represented by a directory in the cgroup file system
containing the following files describing that cgroup:
- tasks: list of tasks (by pid) attached to that cgroup
- notify_on_release flag: run /sbin/cgroup_release_agent on exit?
- releasable flag: cgroup currently removeable?
- notify_on_release flag: run the release agent on exit?
- release_agent: the path to use for release notifications (this file
exists in the top cgroup only)
Other subsystems such as cpusets may add additional files in each
cgroup dir
cgroup dir.
New cgroups are created using the mkdir system call or shell
command. The properties of a cgroup, such as its flags, are
@ -257,7 +260,7 @@ performance.
To allow access from a cgroup to the css_sets (and hence tasks)
that comprise it, a set of cg_cgroup_link objects form a lattice;
each cg_cgroup_link is linked into a list of cg_cgroup_links for
a single cgroup on its cont_link_list field, and a list of
a single cgroup on its cgrp_link_list field, and a list of
cg_cgroup_links for a single css_set on its cg_link_list.
Thus the set of tasks in a cgroup can be listed by iterating over
@ -271,9 +274,6 @@ for cgroups, with a minimum of additional kernel code.
1.4 What does notify_on_release do ?
------------------------------------
*** notify_on_release is disabled in the current patch set. It will be
*** reactivated in a future patch in a less-intrusive manner
If the notify_on_release flag is enabled (1) in a cgroup, then
whenever the last task in the cgroup leaves (exits or attaches to
some other cgroup) and the last child cgroup of that cgroup
@ -360,8 +360,8 @@ Now you want to do something with this cgroup.
In this directory you can find several files:
# ls
notify_on_release release_agent tasks
(plus whatever files are added by the attached subsystems)
notify_on_release releasable tasks
(plus whatever files added by the attached subsystems)
Now attach your shell to this cgroup:
# /bin/echo $$ > tasks
@ -404,19 +404,13 @@ with a subsystem id which will be assigned by the cgroup system.
Other fields in the cgroup_subsys object include:
- subsys_id: a unique array index for the subsystem, indicating which
entry in cgroup->subsys[] this subsystem should be
managing. Initialized by cgroup_register_subsys(); prior to this
it should be initialized to -1
entry in cgroup->subsys[] this subsystem should be managing.
- hierarchy: an index indicating which hierarchy, if any, this
subsystem is currently attached to. If this is -1, then the
subsystem is not attached to any hierarchy, and all tasks should be
considered to be members of the subsystem's top_cgroup. It should
be initialized to -1.
- name: should be initialized to a unique subsystem name. Should be
no longer than MAX_CGROUP_TYPE_NAMELEN.
- name: should be initialized to a unique subsystem name prior to
calling cgroup_register_subsystem. Should be no longer than
MAX_CGROUP_TYPE_NAMELEN
- early_init: indicate if the subsystem needs early initialization
at system boot.
Each cgroup object created by the system has an array of pointers,
indexed by subsystem id; this pointer is entirely managed by the
@ -434,8 +428,6 @@ situation.
See kernel/cgroup.c for more details.
Subsystems can take/release the cgroup_mutex via the functions
cgroup_lock()/cgroup_unlock(), and can
take/release the callback_mutex via the functions
cgroup_lock()/cgroup_unlock().
Accessing a task's cgroup pointer may be done in the following ways:
@ -444,7 +436,7 @@ Accessing a task's cgroup pointer may be done in the following ways:
- inside an rcu_read_lock() section via rcu_dereference()
3.3 Subsystem API
--------------------------
-----------------
Each subsystem should:
@ -455,7 +447,8 @@ Each subsystem may export the following methods. The only mandatory
methods are create/destroy. Any others that are null are presumed to
be successful no-ops.
struct cgroup_subsys_state *create(struct cgroup *cont)
struct cgroup_subsys_state *create(struct cgroup_subsys *ss,
struct cgroup *cgrp)
(cgroup_mutex held by caller)
Called to create a subsystem state object for a cgroup. The
@ -470,7 +463,7 @@ identified by the passed cgroup object having a NULL parent (since
it's the root of the hierarchy) and may be an appropriate place for
initialization code.
void destroy(struct cgroup *cont)
void destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
(cgroup_mutex held by caller)
The cgroup system is about to destroy the passed cgroup; the subsystem
@ -481,7 +474,14 @@ cgroup->parent is still valid. (Note - can also be called for a
newly-created cgroup if an error occurs after this subsystem's
create() method has been called for the new cgroup).
int can_attach(struct cgroup_subsys *ss, struct cgroup *cont,
void pre_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
(cgroup_mutex held by caller)
Called before checking the reference count on each subsystem. This may
be useful for subsystems which have some extra references even if
there are not tasks in the cgroup.
int can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct task_struct *task)
(cgroup_mutex held by caller)
@ -492,8 +492,8 @@ unspecified task can be moved into the cgroup. Note that this isn't
called on a fork. If this method returns 0 (success) then this should
remain valid while the caller holds cgroup_mutex.
void attach(struct cgroup_subsys *ss, struct cgroup *cont,
struct cgroup *old_cont, struct task_struct *task)
void attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct cgroup *old_cgrp, struct task_struct *task)
Called after the task has been attached to the cgroup, to allow any
post-attachment activity that requires memory allocations or blocking.
@ -505,9 +505,9 @@ registration for all existing tasks.
void exit(struct cgroup_subsys *ss, struct task_struct *task)
Called during task exit
Called during task exit.
int populate(struct cgroup_subsys *ss, struct cgroup *cont)
int populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
Called after creation of a cgroup to allow a subsystem to populate
the cgroup directory with file entries. The subsystem should make
@ -516,7 +516,7 @@ include/linux/cgroup.h for details). Note that although this
method can return an error code, the error code is currently not
always handled well.
void post_clone(struct cgroup_subsys *ss, struct cgroup *cont)
void post_clone(struct cgroup_subsys *ss, struct cgroup *cgrp)
Called at the end of cgroup_clone() to do any paramater
initialization which might be required before a task could attach. For

2
Documentation/cli-sti-removal.txt
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@ -43,7 +43,7 @@ would execute while the cli()-ed section is executing.
but from now on a more direct method of locking has to be used:
spinlock_t driver_lock = SPIN_LOCK_UNLOCKED;
DEFINE_SPINLOCK(driver_lock);
struct driver_data;
irq_handler (...)

38
Documentation/controllers/memory.txt
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@ -1,4 +1,8 @@
Memory Controller
Memory Resource Controller
NOTE: The Memory Resource Controller has been generically been referred
to as the memory controller in this document. Do not confuse memory controller
used here with the memory controller that is used in hardware.
Salient features
@ -152,7 +156,7 @@ The memory controller uses the following hierarchy
a. Enable CONFIG_CGROUPS
b. Enable CONFIG_RESOURCE_COUNTERS
c. Enable CONFIG_CGROUP_MEM_CONT
c. Enable CONFIG_CGROUP_MEM_RES_CTLR
1. Prepare the cgroups
# mkdir -p /cgroups
@ -164,20 +168,20 @@ c. Enable CONFIG_CGROUP_MEM_CONT
Since now we're in the 0 cgroup,
We can alter the memory limit:
# echo -n 4M > /cgroups/0/memory.limit_in_bytes
# echo 4M > /cgroups/0/memory.limit_in_bytes
NOTE: We can use a suffix (k, K, m, M, g or G) to indicate values in kilo,
mega or gigabytes.
# cat /cgroups/0/memory.limit_in_bytes
4194304 Bytes
4194304
NOTE: The interface has now changed to display the usage in bytes
instead of pages
We can check the usage:
# cat /cgroups/0/memory.usage_in_bytes
1216512 Bytes
1216512
A successful write to this file does not guarantee a successful set of
this limit to the value written into the file. This can be due to a
@ -185,9 +189,9 @@ number of factors, such as rounding up to page boundaries or the total
availability of memory on the system. The user is required to re-read
this file after a write to guarantee the value committed by the kernel.
# echo -n 1 > memory.limit_in_bytes
# echo 1 > memory.limit_in_bytes
# cat memory.limit_in_bytes
4096 Bytes
4096
The memory.failcnt field gives the number of times that the cgroup limit was
exceeded.
@ -197,7 +201,7 @@ caches, RSS and Active pages/Inactive pages are shown.
The memory.force_empty gives an interface to drop *all* charges by force.
# echo -n 1 > memory.force_empty
# echo 1 > memory.force_empty
will drop all charges in cgroup. Currently, this is maintained for test.
@ -233,13 +237,6 @@ cgroup might have some charge associated with it, even though all
tasks have migrated away from it. Such charges are automatically dropped at
rmdir() if there are no tasks.
4.4 Choosing what to account -- Page Cache (unmapped) vs RSS (mapped)?
The type of memory accounted by the cgroup can be limited to just
mapped pages by writing "1" to memory.control_type field
echo -n 1 > memory.control_type
5. TODO
1. Add support for accounting huge pages (as a separate controller)
@ -262,18 +259,19 @@ References
3. Emelianov, Pavel. Resource controllers based on process cgroups
http://lkml.org/lkml/2007/3/6/198
4. Emelianov, Pavel. RSS controller based on process cgroups (v2)
http://lkml.org/lkml/2007/4/9/74
http://lkml.org/lkml/2007/4/9/78
5. Emelianov, Pavel. RSS controller based on process cgroups (v3)
http://lkml.org/lkml/2007/5/30/244
6. Menage, Paul. Control Groups v10, http://lwn.net/Articles/236032/
7. Vaidyanathan, Srinivasan, Control Groups: Pagecache accounting and control
subsystem (v3), http://lwn.net/Articles/235534/
8. Singh, Balbir. RSS controller V2 test results (lmbench),
8. Singh, Balbir. RSS controller v2 test results (lmbench),
http://lkml.org/lkml/2007/5/17/232
9. Singh, Balbir. RSS controller V2 AIM9 results
9. Singh, Balbir. RSS controller v2 AIM9 results
http://lkml.org/lkml/2007/5/18/1
10. Singh, Balbir. Memory controller v6 results,
10. Singh, Balbir. Memory controller v6 test results,
http://lkml.org/lkml/2007/8/19/36
11. Singh, Balbir. Memory controller v6, http://lkml.org/lkml/2007/8/17/69
11. Singh, Balbir. Memory controller introduction (v6),
http://lkml.org/lkml/2007/8/17/69
12. Corbet, Jonathan, Controlling memory use in cgroups,
http://lwn.net/Articles/243795/

74
Documentation/cpusets.txt
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@ -8,6 +8,7 @@ Portions Copyright (c) 2004-2006 Silicon Graphics, Inc.
Modified by Paul Jackson <pj@sgi.com>
Modified by Christoph Lameter <clameter@sgi.com>
Modified by Paul Menage <menage@google.com>
Modified by Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
CONTENTS:
=========
@ -20,7 +21,8 @@ CONTENTS:
1.5 What is memory_pressure ?
1.6 What is memory spread ?
1.7 What is sched_load_balance ?
1.8 How do I use cpusets ?
1.8 What is sched_relax_domain_level ?
1.9 How do I use cpusets ?
2. Usage Examples and Syntax
2.1 Basic Usage
2.2 Adding/removing cpus
@ -209,7 +211,7 @@ and name space for cpusets, with a minimum of additional kernel code.
The cpus and mems files in the root (top_cpuset) cpuset are
read-only. The cpus file automatically tracks the value of
cpu_online_map using a CPU hotplug notifier, and the mems file
automatically tracks the value of node_states[N_MEMORY]--i.e.,
automatically tracks the value of node_states[N_HIGH_MEMORY]--i.e.,
nodes with memory--using the cpuset_track_online_nodes() hook.
@ -497,7 +499,73 @@ the cpuset code to update these sched domains, it compares the new
partition requested with the current, and updates its sched domains,
removing the old and adding the new, for each change.
1.8 How do I use cpusets ?
1.8 What is sched_relax_domain_level ?
--------------------------------------
In sched domain, the scheduler migrates tasks in 2 ways; periodic load
balance on tick, and at time of some schedule events.
When a task is woken up, scheduler try to move the task on idle CPU.
For example, if a task A running on CPU X activates another task B
on the same CPU X, and if CPU Y is X's sibling and performing idle,
then scheduler migrate task B to CPU Y so that task B can start on
CPU Y without waiting task A on CPU X.
And if a CPU run out of tasks in its runqueue, the CPU try to pull
extra tasks from other busy CPUs to help them before it is going to
be idle.
Of course it takes some searching cost to find movable tasks and/or
idle CPUs, the scheduler might not search all CPUs in the domain
everytime. In fact, in some architectures, the searching ranges on
events are limited in the same socket or node where the CPU locates,
while the load balance on tick searchs all.
For example, assume CPU Z is relatively far from CPU X. Even if CPU Z
is idle while CPU X and the siblings are busy, scheduler can't migrate
woken task B from X to Z since it is out of its searching range.
As the result, task B on CPU X need to wait task A or wait load balance
on the next tick. For some applications in special situation, waiting
1 tick may be too long.
The 'sched_relax_domain_level' file allows you to request changing
this searching range as you like. This file takes int value which
indicates size of searching range in levels ideally as follows,
otherwise initial value -1 that indicates the cpuset has no request.
-1 : no request. use system default or follow request of others.
0 : no search.
1 : search siblings (hyperthreads in a core).
2 : search cores in a package.
3 : search cpus in a node [= system wide on non-NUMA system]
( 4 : search nodes in a chunk of node [on NUMA system] )
( 5~ : search system wide [on NUMA system])
This file is per-cpuset and affect the sched domain where the cpuset
belongs to. Therefore if the flag 'sched_load_balance' of a cpuset
is disabled, then 'sched_relax_domain_level' have no effect since
there is no sched domain belonging the cpuset.
If multiple cpusets are overlapping and hence they form a single sched
domain, the largest value among those is used. Be careful, if one
requests 0 and others are -1 then 0 is used.
Note that modifying this file will have both good and bad effects,
and whether it is acceptable or not will be depend on your situation.
Don't modify this file if you are not sure.
If your situation is:
- The migration costs between each cpu can be assumed considerably
small(for you) due to your special application's behavior or
special hardware support for CPU cache etc.
- The searching cost doesn't have impact(for you) or you can make
the searching cost enough small by managing cpuset to compact etc.
- The latency is required even it sacrifices cache hit rate etc.
then increasing 'sched_relax_domain_level' would benefit you.
1.9 How do I use cpusets ?
--------------------------
In order to minimize the impact of cpusets on critical kernel

25
Documentation/debugging-via-ohci1394.txt
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@ -36,19 +36,24 @@ available (notebooks) or too slow for extensive debug information (like ACPI).
Drivers
-------
The OHCI-1394 drivers in drivers/firewire and drivers/ieee1394 initialize
the OHCI-1394 controllers to a working state and can be used to enable
physical DMA. By default you only have to load the driver, and physical
DMA access will be granted to all remote nodes, but it can be turned off
when using the ohci1394 driver.
The ohci1394 driver in drivers/ieee1394 initializes the OHCI-1394 controllers
to a working state and enables physical DMA by default for all remote nodes.
This can be turned off by ohci1394's module parameter phys_dma=0.
Because these drivers depend on the PCI enumeration to be completed, an
initialization routine which can runs pretty early (long before console_init(),
which makes the printk buffer appear on the console can be called) was written.
The alternative firewire-ohci driver in drivers/firewire uses filtered physical
DMA by default, which is more secure but not suitable for remote debugging.
Compile the driver with CONFIG_FIREWIRE_OHCI_REMOTE_DMA (Kernel hacking menu:
Remote debugging over FireWire with firewire-ohci) to get unfiltered physical
DMA.
Because ohci1394 and firewire-ohci depend on the PCI enumeration to be
completed, an initialization routine which runs pretty early has been
implemented for x86. This routine runs long before console_init() can be
called, i.e. before the printk buffer appears on the console.
To activate it, enable CONFIG_PROVIDE_OHCI1394_DMA_INIT (Kernel hacking menu:
Provide code for enabling DMA over FireWire early on boot) and pass the
parameter "ohci1394_dma=early" to the recompiled kernel on boot.
Remote debugging over FireWire early on boot) and pass the parameter
"ohci1394_dma=early" to the recompiled kernel on boot.
Tools
-----

1
Documentation/dontdiff
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@ -47,7 +47,6 @@
.mm
53c700_d.h
53c8xx_d.h*
BitKeeper
COPYING
CREDITS
CVS

4
Documentation/early-userspace/README
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@ -89,8 +89,8 @@ the 2.7 era (it missed the boat for 2.5).
You can obtain somewhat infrequent snapshots of klibc from
ftp://ftp.kernel.org/pub/linux/libs/klibc/
For active users, you are better off using the klibc BitKeeper
repositories, at http://klibc.bkbits.net/
For active users, you are better off using the klibc git
repository, at http://git.kernel.org/?p=libs/klibc/klibc.git
The standalone klibc distribution currently provides three components,
in addition to the klibc library:

53
Documentation/fb/cmap_xfbdev.txt Normal file
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@ -0,0 +1,53 @@
Understanding fbdev's cmap
--------------------------
These notes explain how X's dix layer uses fbdev's cmap structures.
*. example of relevant structures in fbdev as used for a 3-bit grayscale cmap
struct fb_var_screeninfo {
.bits_per_pixel = 8,
.grayscale = 1,
.red = { 4, 3, 0 },
.green = { 0, 0, 0 },
.blue = { 0, 0, 0 },
}
struct fb_fix_screeninfo {
.visual = FB_VISUAL_STATIC_PSEUDOCOLOR,
}
for (i = 0; i < 8; i++)
info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/16;
memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*8);
memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*8);
*. X11 apps do something like the following when trying to use grayscale.
for (i=0; i < 8; i++) {
char colorspec[64];
memset(colorspec,0,64);
sprintf(colorspec, "rgb:%x/%x/%x", i*36,i*36,i*36);
if (!XParseColor(outputDisplay, testColormap, colorspec, &wantedColor))
printf("Can't get color %s\n",colorspec);
XAllocColor(outputDisplay, testColormap, &wantedColor);
grays[i] = wantedColor;
}
There's also named equivalents like gray1..x provided you have an rgb.txt.
Somewhere in X's callchain, this results in a call to X code that handles the
colormap. For example, Xfbdev hits the following:
xc-011010/programs/Xserver/dix/colormap.c:
FindBestPixel(pentFirst, size, prgb, channel)
dr = (long) pent->co.local.red - prgb->red;
dg = (long) pent->co.local.green - prgb->green;
db = (long) pent->co.local.blue - prgb->blue;
sq = dr * dr;
UnsignedToBigNum (sq, &sum);
BigNumAdd (&sum, &temp, &sum);
co.local.red are entries that were brought in through FBIOGETCMAP which come
directly from the info->cmap.red that was listed above. The prgb is the rgb
that the app wants to match to. The above code is doing what looks like a least
squares matching function. That's why the cmap entries can't be set to the left
hand side boundaries of a color range.

38
Documentation/fb/metronomefb.txt Normal file
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@ -0,0 +1,38 @@
Metronomefb
-----------
Maintained by Jaya Kumar <jayakumar.lkml.gmail.com>
Last revised: Nov 20, 2007
Metronomefb is a driver for the Metronome display controller. The controller
is from E-Ink Corporation. It is intended to be used to drive the E-Ink
Vizplex display media. E-Ink hosts some details of this controller and the
display media here http://www.e-ink.com/products/matrix/metronome.html .
Metronome is interfaced to the host CPU through the AMLCD interface. The
host CPU generates the control information and the image in a framebuffer
which is then delivered to the AMLCD interface by a host specific method.
Currently, that's implemented for the PXA's LCDC controller. The display and
error status are each pulled through individual GPIOs.
Metronomefb was written for the PXA255/gumstix/lyre combination and
therefore currently has board set specific code in it. If other boards based on
other architectures are available, then the host specific code can be separated
and abstracted out.
Metronomefb requires waveform information which is delivered via the AMLCD
interface to the metronome controller. The waveform information is expected to
be delivered from userspace via the firmware class interface. The waveform file
can be compressed as long as your udev or hotplug script is aware of the need
to uncompress it before delivering it. metronomefb will ask for waveform.wbf
which would typically go into /lib/firmware/waveform.wbf depending on your
udev/hotplug setup. I have only tested with a single waveform file which was
originally labeled 23P01201_60_WT0107_MTC. I do not know what it stands for.
Caution should be exercised when manipulating the waveform as there may be
a possibility that it could have some permanent effects on the display media.
I neither have access to nor know exactly what the waveform does in terms of
the physical media.
Metronomefb uses the deferred IO interface so that it can provide a memory
mappable frame buffer. It has been tested with tinyx (Xfbdev). It is known
to work at this time with xeyes, xclock, xloadimage, xpdf.

79
Documentation/feature-removal-schedule.txt
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@ -203,16 +203,8 @@ Who: linuxppc-dev@ozlabs.org
---------------------------
What: sk98lin network driver
When: Feburary 2008
Why: In kernel tree version of driver is unmaintained. Sk98lin driver
replaced by the skge driver.
Who: Stephen Hemminger <shemminger@linux-foundation.org>
---------------------------
What: i386/x86_64 bzImage symlinks
When: April 2008
When: April 2010
Why: The i386/x86_64 merge provides a symlink to the old bzImage
location so not yet updated user space tools, e.g. package
@ -221,8 +213,6 @@ Who: Thomas Gleixner <tglx@linutronix.de>
---------------------------
---------------------------
What: i2c-i810, i2c-prosavage and i2c-savage4
When: May 2008
Why: These drivers are superseded by i810fb, intelfb and savagefb.
@ -230,33 +220,6 @@ Who: Jean Delvare <khali@linux-fr.org>
---------------------------
What: bcm43xx wireless network driver
When: 2.6.26
Files: drivers/net/wireless/bcm43xx
Why: This driver's functionality has been replaced by the
mac80211-based b43 and b43legacy drivers.
Who: John W. Linville <linville@tuxdriver.com>
---------------------------
What: ieee80211 softmac wireless networking component
When: 2.6.26 (or after removal of bcm43xx and port of zd1211rw to mac80211)
Files: net/ieee80211/softmac
Why: No in-kernel drivers will depend on it any longer.
Who: John W. Linville <linville@tuxdriver.com>
---------------------------
What: rc80211-simple rate control algorithm for mac80211
When: 2.6.26
Files: net/mac80211/rc80211-simple.c
Why: This algorithm was provided for reference but always exhibited bad
responsiveness and performance and has some serious flaws. It has been
replaced by rc80211-pid.
Who: Stefano Brivio <stefano.brivio@polimi.it>
---------------------------
What (Why):
- include/linux/netfilter_ipv4/ipt_TOS.h ipt_tos.h header files
(superseded by xt_TOS/xt_tos target & match)
@ -298,11 +261,37 @@ Who: Michael Buesch <mb@bu3sch.de>
---------------------------
What: Solaris/SunOS syscall and binary support on Sparc
What: init_mm export
When: 2.6.26
Why: Largely unmaintained and almost entirely unused. File system
layering used to divert library and dynamic linker searches to
/usr/gnemul is extremely buggy and unfixable. Making it work
is largely pointless as without a lot of work only the most
trivial of Solaris binaries can work with the emulation code.
Who: David S. Miller <davem@davemloft.net>
Why: Not used in-tree. The current out-of-tree users used it to
work around problems in the CPA code which should be resolved
by now. One usecase was described to provide verification code
of the CPA operation. That's a good idea in general, but such
code / infrastructure should be in the kernel and not in some
out-of-tree driver.
Who: Thomas Gleixner <tglx@linutronix.de>
----------------------------
What: usedac i386 kernel parameter
When: 2.6.27
Why: replaced by allowdac and no dac combination
Who: Glauber Costa <gcosta@redhat.com>
---------------------------
What: /sys/o2cb symlink
When: January 2010
Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb
exists as a symlink for backwards compatibility for old versions of
ocfs2-tools. 2 years should be sufficient time to phase in new versions
which know to look in /sys/fs/o2cb.
Who: ocfs2-devel@oss.oracle.com
---------------------------
What: asm/semaphore.h
When: 2.6.26
Why: Implementation became generic; users should now include
linux/semaphore.h instead.
Who: Matthew Wilcox <willy@linux.intel.com>

6
Documentation/filesystems/00-INDEX
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@ -66,6 +66,8 @@ mandatory-locking.txt
- info on the Linux implementation of Sys V mandatory file locking.
ncpfs.txt
- info on Novell Netware(tm) filesystem using NCP protocol.
nfsroot.txt
- short guide on setting up a diskless box with NFS root filesystem.
ntfs.txt
- info and mount options for the NTFS filesystem (Windows NT).
ocfs2.txt
@ -82,6 +84,10 @@ relay.txt
- info on relay, for efficient streaming from kernel to user space.
romfs.txt
- description of the ROMFS filesystem.
rpc-cache.txt
- introduction to the caching mechanisms in the sunrpc layer.
seq_file.txt
- how to use the seq_file API
sharedsubtree.txt
- a description of shared subtrees for namespaces.
smbfs.txt

0
Documentation/nfsroot.txt → Documentation/filesystems/nfsroot.txt
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4
Documentation/filesystems/proc.txt
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@ -1506,13 +1506,13 @@ laptop_mode
-----------
laptop_mode is a knob that controls "laptop mode". All the things that are
controlled by this knob are discussed in Documentation/laptop-mode.txt.
controlled by this knob are discussed in Documentation/laptops/laptop-mode.txt.
block_dump
----------
block_dump enables block I/O debugging when set to a nonzero value. More
information on block I/O debugging is in Documentation/laptop-mode.txt.
information on block I/O debugging is in Documentation/laptops/laptop-mode.txt.
swap_token_timeout
------------------

0
Documentation/rpc-cache.txt → Documentation/filesystems/rpc-cache.txt
Просмотреть файл

283
Documentation/filesystems/seq_file.txt Normal file
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@ -0,0 +1,283 @@
The seq_file interface
Copyright 2003 Jonathan Corbet <corbet@lwn.net>
This file is originally from the LWN.net Driver Porting series at
http://lwn.net/Articles/driver-porting/
There are numerous ways for a device driver (or other kernel component) to
provide information to the user or system administrator. One useful
technique is the creation of virtual files, in debugfs, /proc or elsewhere.
Virtual files can provide human-readable output that is easy to get at
without any special utility programs; they can also make life easier for
script writers. It is not surprising that the use of virtual files has
grown over the years.
Creating those files correctly has always been a bit of a challenge,
however. It is not that hard to make a virtual file which returns a
string. But life gets trickier if the output is long - anything greater
than an application is likely to read in a single operation. Handling
multiple reads (and seeks) requires careful attention to the reader's
position within the virtual file - that position is, likely as not, in the
middle of a line of output. The kernel has traditionally had a number of
implementations that got this wrong.
The 2.6 kernel contains a set of functions (implemented by Alexander Viro)
which are designed to make it easy for virtual file creators to get it
right.
The seq_file interface is available via <linux/seq_file.h>. There are
three aspects to seq_file:
* An iterator interface which lets a virtual file implementation
step through the objects it is presenting.
* Some utility functions for formatting objects for output without
needing to worry about things like output buffers.
* A set of canned file_operations which implement most operations on
the virtual file.
We'll look at the seq_file interface via an extremely simple example: a
loadable module which creates a file called /proc/sequence. The file, when
read, simply produces a set of increasing integer values, one per line. The
sequence will continue until the user loses patience and finds something
better to do. The file is seekable, in that one can do something like the
following:
dd if=/proc/sequence of=out1 count=1
dd if=/proc/sequence skip=1 out=out2 count=1
Then concatenate the output files out1 and out2 and get the right
result. Yes, it is a thoroughly useless module, but the point is to show
how the mechanism works without getting lost in other details. (Those
wanting to see the full source for this module can find it at
http://lwn.net/Articles/22359/).
The iterator interface
Modules implementing a virtual file with seq_file must implement a simple
iterator object that allows stepping through the data of interest.
Iterators must be able to move to a specific position - like the file they
implement - but the interpretation of that position is up to the iterator
itself. A seq_file implementation that is formatting firewall rules, for
example, could interpret position N as the Nth rule in the chain.
Positioning can thus be done in whatever way makes the most sense for the
generator of the data, which need not be aware of how a position translates
to an offset in the virtual file. The one obvious exception is that a
position of zero should indicate the beginning of the file.
The /proc/sequence iterator just uses the count of the next number it
will output as its position.
Four functions must be implemented to make the iterator work. The first,
called start() takes a position as an argument and returns an iterator
which will start reading at that position. For our simple sequence example,
the start() function looks like:
static void *ct_seq_start(struct seq_file *s, loff_t *pos)
{
loff_t *spos = kmalloc(sizeof(loff_t), GFP_KERNEL);
if (! spos)
return NULL;
*spos = *pos;
return spos;
}
The entire data structure for this iterator is a single loff_t value
holding the current position. There is no upper bound for the sequence
iterator, but that will not be the case for most other seq_file
implementations; in most cases the start() function should check for a
"past end of file" condition and return NULL if need be.
For more complicated applications, the private field of the seq_file
structure can be used. There is also a special value which can be returned
by the start() function called SEQ_START_TOKEN; it can be used if you wish
to instruct your show() function (described below) to print a header at the
top of the output. SEQ_START_TOKEN should only be used if the offset is
zero, however.
The next function to implement is called, amazingly, next(); its job is to
move the iterator forward to the next position in the sequence. The
example module can simply increment the position by one; more useful
modules will do what is needed to step through some data structure. The
next() function returns a new iterator, or NULL if the sequence is
complete. Here's the example version:
static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
loff_t *spos = v;
*pos = ++*spos;
return spos;
}
The stop() function is called when iteration is complete; its job, of
course, is to clean up. If dynamic memory is allocated for the iterator,
stop() is the place to free it.
static void ct_seq_stop(struct seq_file *s, void *v)
{
kfree(v);
}
Finally, the show() function should format the object currently pointed to
by the iterator for output. It should return zero, or an error code if
something goes wrong. The example module's show() function is:
static int ct_seq_show(struct seq_file *s, void *v)
{
loff_t *spos = v;
seq_printf(s, "%lld\n", (long long)*spos);
return 0;
}
We will look at seq_printf() in a moment. But first, the definition of the
seq_file iterator is finished by creating a seq_operations structure with
the four functions we have just defined:
static const struct seq_operations ct_seq_ops = {
.start = ct_seq_start,
.next = ct_seq_next,
.stop = ct_seq_stop,
.show = ct_seq_show
};
This structure will be needed to tie our iterator to the /proc file in
a little bit.
It's worth noting that the iterator value returned by start() and
manipulated by the other functions is considered to be completely opaque by
the seq_file code. It can thus be anything that is useful in stepping
through the data to be output. Counters can be useful, but it could also be
a direct pointer into an array or linked list. Anything goes, as long as
the programmer is aware that things can happen between calls to the
iterator function. However, the seq_file code (by design) will not sleep
between the calls to start() and stop(), so holding a lock during that time
is a reasonable thing to do. The seq_file code will also avoid taking any
other locks while the iterator is active.
Formatted output
The seq_file code manages positioning within the output created by the
iterator and getting it into the user's buffer. But, for that to work, that
output must be passed to the seq_file code. Some utility functions have
been defined which make this task easy.
Most code will simply use seq_printf(), which works pretty much like
printk(), but which requires the seq_file pointer as an argument. It is
common to ignore the return value from seq_printf(), but a function
producing complicated output may want to check that value and quit if
something non-zero is returned; an error return means that the seq_file
buffer has been filled and further output will be discarded.
For straight character output, the following functions may be used:
int seq_putc(struct seq_file *m, char c);
int seq_puts(struct seq_file *m, const char *s);
int seq_escape(struct seq_file *m, const char *s, const char *esc);
The first two output a single character and a string, just like one would
expect. seq_escape() is like seq_puts(), except that any character in s
which is in the string esc will be represented in octal form in the output.
There is also a function for printing filenames:
int seq_path(struct seq_file *m, struct path *path, char *esc);
Here, path indicates the file of interest, and esc is a set of characters
which should be escaped in the output.
Making it all work
So far, we have a nice set of functions which can produce output within the
seq_file system, but we have not yet turned them into a file that a user
can see. Creating a file within the kernel requires, of course, the
creation of a set of file_operations which implement the operations on that
file. The seq_file interface provides a set of canned operations which do
most of the work. The virtual file author still must implement the open()
method, however, to hook everything up. The open function is often a single
line, as in the example module:
static int ct_open(struct inode *inode, struct file *file)
{
return seq_open(file, &ct_seq_ops);
}
Here, the call to seq_open() takes the seq_operations structure we created
before, and gets set up to iterate through the virtual file.
On a successful open, seq_open() stores the struct seq_file pointer in
file->private_data. If you have an application where the same iterator can
be used for more than one file, you can store an arbitrary pointer in the
private field of the seq_file structure; that value can then be retrieved
by the iterator functions.
The other operations of interest - read(), llseek(), and release() - are
all implemented by the seq_file code itself. So a virtual file's
file_operations structure will look like:
static const struct file_operations ct_file_ops = {
.owner = THIS_MODULE,
.open = ct_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release
};
There is also a seq_release_private() which passes the contents of the
seq_file private field to kfree() before releasing the structure.
The final step is the creation of the /proc file itself. In the example
code, that is done in the initialization code in the usual way:
static int ct_init(void)
{
struct proc_dir_entry *entry;
entry = create_proc_entry("sequence", 0, NULL);
if (entry)
entry->proc_fops = &ct_file_ops;
return 0;
}
module_init(ct_init);
And that is pretty much it.
seq_list
If your file will be iterating through a linked list, you may find these
routines useful:
struct list_head *seq_list_start(struct list_head *head,
loff_t pos);
struct list_head *seq_list_start_head(struct list_head *head,
loff_t pos);
struct list_head *seq_list_next(void *v, struct list_head *head,
loff_t *ppos);
These helpers will interpret pos as a position within the list and iterate
accordingly. Your start() and next() functions need only invoke the
seq_list_* helpers with a pointer to the appropriate list_head structure.
The extra-simple version
For extremely simple virtual files, there is an even easier interface. A
module can define only the show() function, which should create all the
output that the virtual file will contain. The file's open() method then
calls:
int single_open(struct file *file,
int (*show)(struct seq_file *m, void *p),
void *data);
When output time comes, the show() function will be called once. The data
value given to single_open() can be found in the private field of the
seq_file structure. When using single_open(), the programmer should use
single_release() instead of seq_release() in the file_operations structure
to avoid a memory leak.

9
Documentation/filesystems/sysfs.txt
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@ -176,8 +176,10 @@ implementations:
Recall that an attribute should only be exporting one value, or an
array of similar values, so this shouldn't be that expensive.
This allows userspace to do partial reads and seeks arbitrarily over
the entire file at will.
This allows userspace to do partial reads and forward seeks
arbitrarily over the entire file at will. If userspace seeks back to
zero or does a pread(2) with an offset of '0' the show() method will
be called again, rearmed, to fill the buffer.
- On write(2), sysfs expects the entire buffer to be passed during the
first write. Sysfs then passes the entire buffer to the store()
@ -192,6 +194,9 @@ implementations:
Other notes:
- Writing causes the show() method to be rearmed regardless of current
file position.
- The buffer will always be PAGE_SIZE bytes in length. On i386, this
is 4096.

15
Documentation/filesystems/xfs.txt
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@ -52,16 +52,15 @@ When mounting an XFS filesystem, the following options are accepted.
and also gets the setgid bit set if it is a directory itself.
ihashsize=value
Sets the number of hash buckets available for hashing the
in-memory inodes of the specified mount point. If a value
of zero is used, the value selected by the default algorithm
will be displayed in /proc/mounts.
In memory inode hashes have been removed, so this option has
no function as of August 2007. Option is deprecated.
ikeep/noikeep
When inode clusters are emptied of inodes, keep them around
on the disk (ikeep) - this is the traditional XFS behaviour
and is still the default for now. Using the noikeep option,
inode clusters are returned to the free space pool.
When ikeep is specified, XFS does not delete empty inode clusters
and keeps them around on disk. ikeep is the traditional XFS
behaviour. When noikeep is specified, empty inode clusters
are returned to the free space pool. The default is noikeep for
non-DMAPI mounts, while ikeep is the default when DMAPI is in use.
inode64
Indicates that XFS is allowed to create inodes at any location

16
Documentation/gpio.txt
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@ -2,6 +2,9 @@ GPIO Interfaces
This provides an overview of GPIO access conventions on Linux.
These calls use the gpio_* naming prefix. No other calls should use that
prefix, or the related __gpio_* prefix.
What is a GPIO?
===============
@ -69,11 +72,13 @@ in this document, but drivers acting as clients to the GPIO interface must
not care how it's implemented.)
That said, if the convention is supported on their platform, drivers should
use it when possible. Platforms should declare GENERIC_GPIO support in
Kconfig (boolean true), which multi-platform drivers can depend on when
using the include file:
use it when possible. Platforms must declare GENERIC_GPIO support in their
Kconfig (boolean true), and provide an <asm/gpio.h> file. Drivers that can't
work without standard GPIO calls should have Kconfig entries which depend
on GENERIC_GPIO. The GPIO calls are available, either as "real code" or as
optimized-away stubs, when drivers use the include file:
#include <asm/gpio.h>
#include <linux/gpio.h>
If you stick to this convention then it'll be easier for other developers to
see what your code is doing, and help maintain it.
@ -316,6 +321,9 @@ pulldowns integrated on some platforms. Not all platforms support them,
or support them in the same way; and any given board might use external
pullups (or pulldowns) so that the on-chip ones should not be used.
(When a circuit needs 5 kOhm, on-chip 100 kOhm resistors won't do.)
Likewise drive strength (2 mA vs 20 mA) and voltage (1.8V vs 3.3V) is a
platform-specific issue, as are models like (not) having a one-to-one
correspondence between configurable pins and GPIOs.
There are other system-specific mechanisms that are not specified here,
like the aforementioned options for input de-glitching and wire-OR output.

2
Documentation/highuid.txt
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@ -28,8 +28,6 @@ What's left to be done for 32-bit UIDs on all Linux architectures:
uses the 32-bit UID system calls properly otherwise.
This affects at least:
SunOS emulation
Solaris emulation
iBCS on Intel
sparc32 emulation on sparc64

63
Documentation/hw_random.txt
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@ -1,20 +1,54 @@
Hardware driver for Intel/AMD/VIA Random Number Generators (RNG)
Copyright 2000,2001 Jeff Garzik <jgarzik@pobox.com>
Copyright 2000,2001 Philipp Rumpf <prumpf@mandrakesoft.com>
Introduction:
The hw_random device driver is software that makes use of a
The hw_random framework is software that makes use of a
special hardware feature on your CPU or motherboard,
a Random Number Generator (RNG).
a Random Number Generator (RNG). The software has two parts:
a core providing the /dev/hw_random character device and its
sysfs support, plus a hardware-specific driver that plugs
into that core.
In order to make effective use of this device driver, you
To make the most effective use of these mechanisms, you
should download the support software as well. Download the
latest version of the "rng-tools" package from the
hw_random driver's official Web site:
http://sourceforge.net/projects/gkernel/
Those tools use /dev/hw_random to fill the kernel entropy pool,
which is used internally and exported by the /dev/urandom and
/dev/random special files.
Theory of operation:
CHARACTER DEVICE. Using the standard open()
and read() system calls, you can read random data from
the hardware RNG device. This data is NOT CHECKED by any
fitness tests, and could potentially be bogus (if the
hardware is faulty or has been tampered with). Data is only
output if the hardware "has-data" flag is set, but nevertheless
a security-conscious person would run fitness tests on the
data before assuming it is truly random.
The rng-tools package uses such tests in "rngd", and lets you
run them by hand with a "rngtest" utility.
/dev/hw_random is char device major 10, minor 183.
CLASS DEVICE. There is a /sys/class/misc/hw_random node with
two unique attributes, "rng_available" and "rng_current". The
"rng_available" attribute lists the hardware-specific drivers
available, while "rng_current" lists the one which is currently
connected to /dev/hw_random. If your system has more than one
RNG available, you may change the one used by writing a name from
the list in "rng_available" into "rng_current".
==========================================================================
Hardware driver for Intel/AMD/VIA Random Number Generators (RNG)
Copyright 2000,2001 Jeff Garzik <jgarzik@pobox.com>
Copyright 2000,2001 Philipp Rumpf <prumpf@mandrakesoft.com>
About the Intel RNG hardware, from the firmware hub datasheet:
The Firmware Hub integrates a Random Number Generator (RNG)
@ -25,20 +59,7 @@ About the Intel RNG hardware, from the firmware hub datasheet:
access to our RNG for use as a security feature. At this time,
the RNG is only to be used with a system in an OS-present state.
Theory of operation:
Character driver. Using the standard open()
and read() system calls, you can read random data from
the hardware RNG device. This data is NOT CHECKED by any
fitness tests, and could potentially be bogus (if the
hardware is faulty or has been tampered with). Data is only
output if the hardware "has-data" flag is set, but nevertheless
a security-conscious person would run fitness tests on the
data before assuming it is truly random.
/dev/hwrandom is char device major 10, minor 183.
Driver notes:
Intel RNG Driver notes:
* FIXME: support poll(2)

79
Documentation/hwmon/adt7473 Normal file
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@ -0,0 +1,79 @@
Kernel driver adt7473
======================
Supported chips:
* Analog Devices ADT7473
Prefix: 'adt7473'
Addresses scanned: I2C 0x2C, 0x2D, 0x2E
Datasheet: Publicly available at the Analog Devices website
Author: Darrick J. Wong
Description
-----------
This driver implements support for the Analog Devices ADT7473 chip family.
The LM85 uses the 2-wire interface compatible with the SMBUS 2.0
specification. Using an analog to digital converter it measures three (3)
temperatures and two (2) voltages. It has three (3) 16-bit counters for
measuring fan speed. There are three (3) PWM outputs that can be used
to control fan speed.
A sophisticated control system for the PWM outputs is designed into the
LM85 that allows fan speed to be adjusted automatically based on any of the
three temperature sensors. Each PWM output is individually adjustable and
programmable. Once configured, the ADT7473 will adjust the PWM outputs in
response to the measured temperatures without further host intervention.
This feature can also be disabled for manual control of the PWM's.
Each of the measured inputs (voltage, temperature, fan speed) has
corresponding high/low limit values. The ADT7473 will signal an ALARM if
any measured value exceeds either limit.
The ADT7473 samples all inputs continuously. The driver will not read
the registers more often than once every other second. Further,
configuration data is only read once per minute.
Special Features
----------------
The ADT7473 have a 10-bit ADC and can therefore measure temperatures
with 0.25 degC resolution. Temperature readings can be configured either
for twos complement format or "Offset 64" format, wherein 63 is subtracted
from the raw value to get the temperature value.
The Analog Devices datasheet is very detailed and describes a procedure for
determining an optimal configuration for the automatic PWM control.
Hardware Configurations
-----------------------
The ADT7473 chips have an optional SMBALERT output that can be used to
signal the chipset in case a limit is exceeded or the temperature sensors
fail. Individual sensor interrupts can be masked so they won't trigger
SMBALERT. The SMBALERT output if configured replaces the PWM2 function.
Configuration Notes
-------------------
Besides standard interfaces driver adds the following:
* PWM Control
* pwm#_auto_point1_pwm and pwm#_auto_point1_temp and
* pwm#_auto_point2_pwm and pwm#_auto_point2_temp -
point1: Set the pwm speed at a lower temperature bound.
point2: Set the pwm speed at a higher temperature bound.
The ADT7473 will scale the pwm between the lower and higher pwm speed when
the temperature is between the two temperature boundaries. PWM values range
from 0 (off) to 255 (full speed).
Notes
-----
The NVIDIA binary driver presents an ADT7473 chip via an on-card i2c bus.
Unfortunately, they fail to set the i2c adapter class, so this driver may
fail to find the chip until the nvidia driver is patched.

4
Documentation/hwmon/coretemp
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@ -4,9 +4,10 @@ Kernel driver coretemp
Supported chips:
* All Intel Core family
Prefix: 'coretemp'
CPUID: family 0x6, models 0xe, 0xf, 0x16
CPUID: family 0x6, models 0xe, 0xf, 0x16, 0x17
Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
Volume 3A: System Programming Guide
http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
Author: Rudolf Marek
@ -25,6 +26,7 @@ may be raised, if the temperature grows enough (more than TjMax) to trigger
the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
temp1_input - Core temperature (in millidegrees Celsius).
temp1_max - All cooling devices should be turned on (on Core2).
temp1_crit - Maximum junction temperature (in millidegrees Celsius).
temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
Correct CPU operation is no longer guaranteed.

3
Documentation/i2c/busses/i2c-i801
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@ -12,8 +12,9 @@ Supported adapters:
* Intel 82801G (ICH7)
* Intel 631xESB/632xESB (ESB2)
* Intel 82801H (ICH8)
* Intel ICH9
* Intel 82801I (ICH9)
* Intel Tolapai
* Intel ICH10
Datasheets: Publicly available at the Intel website
Authors:

34
Documentation/i386/IO-APIC.txt
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@ -1,12 +1,14 @@
Most (all) Intel-MP compliant SMP boards have the so-called 'IO-APIC',
which is an enhanced interrupt controller, it enables us to route
hardware interrupts to multiple CPUs, or to CPU groups.
which is an enhanced interrupt controller. It enables us to route
hardware interrupts to multiple CPUs, or to CPU groups. Without an
IO-APIC, interrupts from hardware will be delivered only to the
CPU which boots the operating system (usually CPU#0).
Linux supports all variants of compliant SMP boards, including ones with
multiple IO-APICs. (multiple IO-APICs are used in high-end servers to
distribute IRQ load further).
multiple IO-APICs. Multiple IO-APICs are used in high-end servers to
distribute IRQ load further.
There are (a few) known breakages in certain older boards, which bugs are
There are (a few) known breakages in certain older boards, such bugs are
usually worked around by the kernel. If your MP-compliant SMP board does
not boot Linux, then consult the linux-smp mailing list archives first.
@ -28,18 +30,18 @@ If your box boots fine with enabled IO-APIC IRQs, then your
hell:~>
<----------------------------
some interrupts are still listed as 'XT PIC', but this is not a problem,
Some interrupts are still listed as 'XT PIC', but this is not a problem;
none of those IRQ sources is performance-critical.
in the unlikely case that your board does not create a working mp-table,
In the unlikely case that your board does not create a working mp-table,
you can use the pirq= boot parameter to 'hand-construct' IRQ entries. This
is nontrivial though and cannot be automated. One sample /etc/lilo.conf
is non-trivial though and cannot be automated. One sample /etc/lilo.conf
entry:
append="pirq=15,11,10"
the actual numbers depend on your system, on your PCI cards and on their
The actual numbers depend on your system, on your PCI cards and on their
PCI slot position. Usually PCI slots are 'daisy chained' before they are
connected to the PCI chipset IRQ routing facility (the incoming PIRQ1-4
lines):
@ -54,7 +56,7 @@ lines):
PIRQ1 ----| |- `----| |- `----| |- `----| |--------| |
`-' `-' `-' `-' `-'
every PCI card emits a PCI IRQ, which can be INTA,INTB,INTC,INTD:
Every PCI card emits a PCI IRQ, which can be INTA, INTB, INTC or INTD:
,-.
INTD--| |
@ -68,7 +70,7 @@ every PCI card emits a PCI IRQ, which can be INTA,INTB,INTC,INTD:
These INTA-D PCI IRQs are always 'local to the card', their real meaning
depends on which slot they are in. If you look at the daisy chaining diagram,
a card in slot4, issuing INTA IRQ, it will end up as a signal on PIRQ2 of
a card in slot4, issuing INTA IRQ, it will end up as a signal on PIRQ4 of
the PCI chipset. Most cards issue INTA, this creates optimal distribution
between the PIRQ lines. (distributing IRQ sources properly is not a
necessity, PCI IRQs can be shared at will, but it's a good for performance
@ -95,21 +97,21 @@ card (IRQ11) in Slot3, and have Slot1 empty:
[value '0' is a generic 'placeholder', reserved for empty (or non-IRQ emitting)
slots.]
generally, it's always possible to find out the correct pirq= settings, just
Generally, it's always possible to find out the correct pirq= settings, just
permute all IRQ numbers properly ... it will take some time though. An
'incorrect' pirq line will cause the booting process to hang, or a device
won't function properly (if it's inserted as eg. a module).
won't function properly (e.g. if it's inserted as a module).
If you have 2 PCI buses, then you can use up to 8 pirq values. Although such
If you have 2 PCI buses, then you can use up to 8 pirq values, although such
boards tend to have a good configuration.
Be prepared that it might happen that you need some strange pirq line:
append="pirq=0,0,0,0,0,0,9,11"
use smart try-and-err techniques to find out the correct pirq line ...
Use smart trial-and-error techniques to find out the correct pirq line ...
good luck and mail to linux-smp@vger.kernel.org or
Good luck and mail to linux-smp@vger.kernel.org or
linux-kernel@vger.kernel.org if you have any problems that are not covered
by this document.

28
Documentation/i386/boot.txt
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@ -170,6 +170,8 @@ Offset Proto Name Meaning
0238/4 2.06+ cmdline_size Maximum size of the kernel command line
023C/4 2.07+ hardware_subarch Hardware subarchitecture
0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data
0248/4 2.08+ payload_offset Offset of kernel payload
024C/4 2.08+ payload_length Length of kernel payload
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
@ -512,6 +514,32 @@ Protocol: 2.07+
A pointer to data that is specific to hardware subarch
Field name: payload_offset
Type: read
Offset/size: 0x248/4
Protocol: 2.08+
If non-zero then this field contains the offset from the end of the
real-mode code to the payload.
The payload may be compressed. The format of both the compressed and
uncompressed data should be determined using the standard magic
numbers. Currently only gzip compressed ELF is used.
Field name: payload_length
Type: read
Offset/size: 0x24c/4
Protocol: 2.08+
The length of the payload.
**** THE IMAGE CHECKSUM
From boot protocol version 2.08 onwards the CRC-32 is calculated over
the entire file using the characteristic polynomial 0x04C11DB7 and an
initial remainder of 0xffffffff. The checksum is appended to the
file; therefore the CRC of the file up to the limit specified in the
syssize field of the header is always 0.
**** THE KERNEL COMMAND LINE

12
Documentation/ide/00-INDEX Normal file
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@ -0,0 +1,12 @@
00-INDEX
- this file
ChangeLog.ide-cd.1994-2004
- ide-cd changelog
ChangeLog.ide-floppy.1996-2002
- ide-floppy changelog
ChangeLog.ide-tape.1995-2002
- ide-tape changelog
ide-tape.txt
- info on the IDE ATAPI streaming tape driver
ide.txt
- important info for users of ATA devices (IDE/EIDE disks and CD-ROMS).

115
Documentation/ide.txt → Documentation/ide/ide.txt
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@ -71,29 +71,6 @@ This driver automatically probes for most IDE interfaces (including all PCI
ones), for the drives/geometries attached to those interfaces, and for the IRQ
lines being used by the interfaces (normally 14, 15 for ide0/ide1).
For special cases, interfaces may be specified using kernel "command line"
options. For example,
ide3=0x168,0x36e,10 /* ioports 0x168-0x16f,0x36e, irq 10 */
Normally the irq number need not be specified, as ide.c will probe for it:
ide3=0x168,0x36e /* ioports 0x168-0x16f,0x36e */
The standard port, and irq values are these:
ide0=0x1f0,0x3f6,14
ide1=0x170,0x376,15
ide2=0x1e8,0x3ee,11
ide3=0x168,0x36e,10
Note that the first parameter reserves 8 contiguous ioports, whereas the
second value denotes a single ioport. If in doubt, do a 'cat /proc/ioports'.
In all probability the device uses these ports and IRQs if it is attached
to the appropriate ide channel. Pass the parameter for the correct ide
channel to the kernel, as explained above.
Any number of interfaces may share a single IRQ if necessary, at a slight
performance penalty, whether on separate cards or a single VLB card.
The IDE driver automatically detects and handles this. However, this may
@ -105,7 +82,7 @@ Drives are normally found by auto-probing and/or examining the CMOS/BIOS data.
For really weird situations, the apparent (fdisk) geometry can also be specified
on the kernel "command line" using LILO. The format of such lines is:
hdx=cyls,heads,sects,wpcom,irq
hdx=cyls,heads,sects
or hdx=cdrom
where hdx can be any of hda through hdh, Three values are required
@ -184,13 +161,6 @@ provided it is mounted with the default block size of 1024 (as above).
Please pass on any feedback on any of this stuff to the maintainer,
whose address can be found in linux/MAINTAINERS.
Note that if BOTH hd.c and ide.c are configured into the kernel,
hd.c will normally be allowed to control the primary IDE interface.
This is useful for older hardware that may be incompatible with ide.c,
and still allows newer hardware to run on the 2nd/3rd/4th IDE ports
under control of ide.c. To have ide.c also "take over" the primary
IDE port in this situation, use the "command line" parameter: ide0=0x1f0
The IDE driver is modularized. The high level disk/CD-ROM/tape/floppy
drivers can always be compiled as loadable modules, the chipset drivers
can only be compiled into the kernel, and the core code (ide.c) can be
@ -206,7 +176,7 @@ When ide.c is used as a module, you can pass command line parameters to the
driver using the "options=" keyword to insmod, while replacing any ',' with
';'. For example:
insmod ide.o options="ide0=serialize ide1=serialize ide2=0x1e8;0x3ee;11"
insmod ide.o options="hda=nodma hdb=nodma"
================================================================================
@ -214,9 +184,9 @@ driver using the "options=" keyword to insmod, while replacing any ',' with
Summary of ide driver parameters for kernel command line
--------------------------------------------------------
"hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
"hdx=" is recognized for all "x" from "a" to "u", such as "hdc".
"idex=" is recognized for all "x" from "0" to "3", such as "ide1".
"idex=" is recognized for all "x" from "0" to "9", such as "ide1".
"hdx=noprobe" : drive may be present, but do not probe for it
@ -228,13 +198,6 @@ Summary of ide driver parameters for kernel command line
"hdx=cyl,head,sect" : disk drive is present, with specified geometry
"hdx=remap" : remap access of sector 0 to sector 1 (for EZDrive)
"hdx=remap63" : remap the drive: add 63 to all sector numbers
(for DM OnTrack)
"idex=noautotune" : driver will NOT attempt to tune interface speed
"hdx=autotune" : driver will attempt to tune interface speed
to the fastest PIO mode supported,
if possible for this drive only.
@ -244,10 +207,6 @@ Summary of ide driver parameters for kernel command line
"hdx=nodma" : disallow DMA
"hdx=scsi" : the return of the ide-scsi flag, this is useful for
allowing ide-floppy, ide-tape, and ide-cdrom|writers
to use ide-scsi emulation on a device specific option.
"idebus=xx" : inform IDE driver of VESA/PCI bus speed in MHz,
where "xx" is between 20 and 66 inclusive,
used when tuning chipset PIO modes.
@ -258,23 +217,11 @@ Summary of ide driver parameters for kernel command line
As for VLB, it is safest to not specify it.
Bigger values are safer than smaller ones.
"idex=noprobe" : do not attempt to access/use this interface
"idex=base" : probe for an interface at the addr specified,
where "base" is usually 0x1f0 or 0x170
and "ctl" is assumed to be "base"+0x206
"idex=base,ctl" : specify both base and ctl
"idex=base,ctl,irq" : specify base, ctl, and irq number
"idex=serialize" : do not overlap operations on idex. Please note
that you will have to specify this option for
both the respective primary and secondary channel
to take effect.
"idex=four" : four drives on idex and ide(x^1) share same ports
"idex=reset" : reset interface after probe
"idex=ata66" : informs the interface that it has an 80c cable
@ -282,12 +229,6 @@ Summary of ide driver parameters for kernel command line
ability to bit test for detection is currently
unknown.
"ide=reverse" : formerly called to pci sub-system, but now local.
The following are valid ONLY on ide0, which usually corresponds
to the first ATA interface found on the particular host, and the defaults for
the base,ctl ports must not be altered.
"ide=doubler" : probe/support IDE doublers on Amiga
There may be more options than shown -- use the source, Luke!
@ -307,52 +248,8 @@ Also for legacy CMD640 host driver (cmd640) you need to use "probe_vlb"
kernel paremeter to enable probing for VLB version of the chipset (PCI ones
are detected automatically).
================================================================================
IDE ATAPI streaming tape driver
-------------------------------
This driver is a part of the Linux ide driver and works in co-operation
with linux/drivers/block/ide.c.
The driver, in co-operation with ide.c, basically traverses the
request-list for the block device interface. The character device
interface, on the other hand, creates new requests, adds them
to the request-list of the block device, and waits for their completion.
Pipelined operation mode is now supported on both reads and writes.
The block device major and minor numbers are determined from the
tape's relative position in the ide interfaces, as explained in ide.c.
The character device interface consists of the following devices:
ht0 major 37, minor 0 first IDE tape, rewind on close.
ht1 major 37, minor 1 second IDE tape, rewind on close.
...
nht0 major 37, minor 128 first IDE tape, no rewind on close.
nht1 major 37, minor 129 second IDE tape, no rewind on close.
...
Run /dev/MAKEDEV to create the above entries.
The general magnetic tape commands compatible interface, as defined by
include/linux/mtio.h, is accessible through the character device.
General ide driver configuration options, such as the interrupt-unmask
flag, can be configured by issuing an ioctl to the block device interface,
as any other ide device.
Our own ide-tape ioctl's can be issued to either the block device or
the character device interface.
Maximal throughput with minimal bus load will usually be achieved in the
following scenario:
1. ide-tape is operating in the pipelined operation mode.
2. No buffering is performed by the user backup program.
You also need to use "probe" kernel parameter for ide-4drives driver
(support for IDE generic chipset with four drives on one port).
================================================================================

13
Documentation/ide/warm-plug-howto.txt Normal file
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@ -0,0 +1,13 @@
IDE warm-plug HOWTO
===================
To warm-plug devices on a port 'idex':
# echo -n "1" > /sys/class/ide_port/idex/delete_devices
unplug old device(s) and plug new device(s)
# echo -n "1" > /sys/class/ide_port/idex/scan
done

52
Documentation/input/notifier.txt Normal file
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@ -0,0 +1,52 @@
Keyboard notifier
One can use register_keyboard_notifier to get called back on keyboard
events (see kbd_keycode() function for details). The passed structure is
keyboard_notifier_param:
- 'vc' always provide the VC for which the keyboard event applies;
- 'down' is 1 for a key press event, 0 for a key release;
- 'shift' is the current modifier state, mask bit indexes are KG_*;
- 'value' depends on the type of event.
- KBD_KEYCODE events are always sent before other events, value is the keycode.
- KBD_UNBOUND_KEYCODE events are sent if the keycode is not bound to a keysym.
value is the keycode.
- KBD_UNICODE events are sent if the keycode -> keysym translation produced a
unicode character. value is the unicode value.
- KBD_KEYSYM events are sent if the keycode -> keysym translation produced a
non-unicode character. value is the keysym.
- KBD_POST_KEYSYM events are sent after the treatment of non-unicode keysyms.
That permits one to inspect the resulting LEDs for instance.
For each kind of event but the last, the callback may return NOTIFY_STOP in
order to "eat" the event: the notify loop is stopped and the keyboard event is
dropped.
In a rough C snippet, we have:
kbd_keycode(keycode) {
...
params.value = keycode;
if (notifier_call_chain(KBD_KEYCODE,&params) == NOTIFY_STOP)
|| !bound) {
notifier_call_chain(KBD_UNBOUND_KEYCODE,&params);
return;
}
if (unicode) {
param.value = unicode;
if (notifier_call_chain(KBD_UNICODE,&params) == NOTIFY_STOP)
return;
emit unicode;
return;
}
params.value = keysym;
if (notifier_call_chain(KBD_KEYSYM,&params) == NOTIFY_STOP)
return;
apply keysym;
notifier_call_chain(KBD_POST_KEYSYM,&params);
}
NOTE: This notifier is usually called from interrupt context.

106
Documentation/ja_JP/stable_kernel_rules.txt
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@ -11,69 +11,69 @@ comment or update of this file, please try to update Original(English)
file at first.
==================================
これは、
これは、
linux-2.6.24/Documentation/stable_kernel_rules.txt
の和訳です。
の和訳です。
翻訳団体： JF プロジェクト < http://www.linux.or.jp/JF/ >
翻訳日： 2007/12/30
翻訳者： Tsugikazu Shibata <tshibata at ab dot jp dot nec dot com>
校正者： 武井伸光さん、<takei at webmasters dot gr dot jp>
かねこさん (Seiji Kaneko) <skaneko at a2 dot mbn dot or dot jp>
小林 雅典さん (Masanori Kobayasi) <zap03216 at nifty dot ne dot jp>
野口さん (Kenji Noguchi) <tokyo246 at gmail dot com>
神宮信太郎さん <jin at libjingu dot jp>
翻訳団体： JF プロジェクト < http://www.linux.or.jp/JF/ >
翻訳日： 2007/12/30
翻訳者： Tsugikazu Shibata <tshibata at ab dot jp dot nec dot com>
校正者： 武井伸光さん、<takei at webmasters dot gr dot jp>
かねこさん (Seiji Kaneko) <skaneko at a2 dot mbn dot or dot jp>
小林 雅典さん (Masanori Kobayasi) <zap03216 at nifty dot ne dot jp>
野口さん (Kenji Noguchi) <tokyo246 at gmail dot com>
神宮信太郎さん <jin at libjingu dot jp>
==================================
ずっと知りたかった Linux 2.6 -stable リリースの全て
ずっと知りたかった Linux 2.6 -stable リリースの全て
"-stable" ツリーにどのような種類のパッチが受け入れられるか、どのような
ものが受け入れられないか、についての規則-
"-stable" ツリーにどのような種類のパッチが受け入れられるか、どのような
ものが受け入れられないか、についての規則-
- 明らかに正しく、テストされているものでなければならない。
- 文脈(変更行の前後)を含めて 100 行より大きくてはいけない。
- ただ一個のことだけを修正しているべき。
- 皆を悩ませている本物のバグを修正しなければならない。("これはバグで
あるかもしれないが..." のようなものではない)
- ビルドエラー(CONFIG_BROKENになっているものを除く), oops, ハング、デー
タ破壊、現実のセキュリティ問題、その他 "ああ、これはダメだね"という
ようなものを修正しなければならない。短く言えば、重大な問題。
- どのように競合状態が発生するかの説明も一緒に書かれていない限り、
"理論的には競合状態になる"ようなものは不可。
- いかなる些細な修正も含めることはできない。(スペルの修正、空白のクリー
ンアップなど)
- 対応するサブシステムメンテナが受け入れたものでなければならない。
- Documentation/SubmittingPatches の規則に従ったものでなければならない。
- 明らかに正しく、テストされているものでなければならない。
- 文脈(変更行の前後)を含めて 100 行より大きくてはいけない。
- ただ一個のことだけを修正しているべき。
- 皆を悩ませている本物のバグを修正しなければならない。("これはバグで
あるかもしれないが..." のようなものではない)
- ビルドエラー(CONFIG_BROKENになっているものを除く), oops, ハング、デー
タ破壊、現実のセキュリティ問題、その他 "ああ、これはダメだね"という
ようなものを修正しなければならない。短く言えば、重大な問題。
- どのように競合状態が発生するかの説明も一緒に書かれていない限り、
"理論的には競合状態になる"ようなものは不可。
- いかなる些細な修正も含めることはできない。(スペルの修正、空白のクリー
ンアップなど)
- 対応するサブシステムメンテナが受け入れたものでなければならない。
- Documentation/SubmittingPatches の規則に従ったものでなければならない。
-stable ツリーにパッチを送付する手続き-
-stable ツリーにパッチを送付する手続き-
- 上記の規則に従っているかを確認した後に、stable@kernel.org にパッチ
を送る。
- 送信者はパッチがキューに受け付けられた際には ACK を、却下された場合
には NAK を受け取る。この反応は開発者たちのスケジュールによって、数
日かかる場合がある。
- もし受け取られたら、パッチは他の開発者たちのレビューのために
-stable キューに追加される。
- セキュリティパッチはこのエイリアス (stable@kernel.org) に送られるべ
きではなく、代わりに security@kernel.org のアドレスに送られる。
- 上記の規則に従っているかを確認した後に、stable@kernel.org にパッチ
を送る。
- 送信者はパッチがキューに受け付けられた際には ACK を、却下された場合
には NAK を受け取る。この反応は開発者たちのスケジュールによって、数
日かかる場合がある。
- もし受け取られたら、パッチは他の開発者たちのレビューのために
-stable キューに追加される。
- セキュリティパッチはこのエイリアス (stable@kernel.org) に送られるべ
きではなく、代わりに security@kernel.org のアドレスに送られる。
レビューサイクル-
レビューサイクル-
- -stable メンテナがレビューサイクルを決めるとき、パッチはレビュー委
員会とパッチが影響する領域のメンテナ(提供者がその領域のメンテナで無
い限り)に送られ、linux-kernel メーリングリストにCCされる。
- レビュー委員会は 48時間の間に ACK か NAK を出す。
- もしパッチが委員会のメンバから却下れるか、メンテナ達やメンバが気付
かなかった問題が持ちあがり、linux-kernel メンバがパッチに異議を唱え
た場合には、パッチはキューから削除される。
- レビューサイクルの最後に、ACK を受けたパッチは最新の -stable リリー
スに追加され、その後に新しい -stable リリースが行われる。
- セキュリティパッチは、通常のレビューサイクルを通らず、セキュリティ
カーネルチームから直接 -stable ツリーに受け付けられる。
この手続きの詳細については kernel security チームに問い合わせること。
- -stable メンテナがレビューサイクルを決めるとき、パッチはレビュー委
員会とパッチが影響する領域のメンテナ(提供者がその領域のメンテナで無
い限り)に送られ、linux-kernel メーリングリストにCCされる。
- レビュー委員会は 48時間の間に ACK か NAK を出す。
- もしパッチが委員会のメンバから却下されるか、メンテナ達やメンバが気付
かなかった問題が持ちあがり、linux-kernel メンバがパッチに異議を唱え
た場合には、パッチはキューから削除される。
- レビューサイクルの最後に、ACK を受けたパッチは最新の -stable リリー
スに追加され、その後に新しい -stable リリースが行われる。
- セキュリティパッチは、通常のレビューサイクルを通らず、セキュリティ
カーネルチームから直接 -stable ツリーに受け付けられる。
この手続きの詳細については kernel security チームに問い合わせること。
レビュー委員会-
レビュー委員会-
- この委員会は、このタスクについて活動する多くのボランティアと、少数の
非ボランティアのカーネル開発者達で構成されている。
- この委員会は、このタスクについて活動する多くのボランティアと、少数の
非ボランティアのカーネル開発者達で構成されている。

128
Documentation/kernel-parameters.txt
Просмотреть файл

@ -138,7 +138,7 @@ and is between 256 and 4096 characters. It is defined in the file
strict -- Be less tolerant of platforms that are not
strictly ACPI specification compliant.
See also Documentation/pm.txt, pci=noacpi
See also Documentation/power/pm.txt, pci=noacpi
acpi_apic_instance= [ACPI, IOAPIC]
Format: <int>
@ -170,16 +170,8 @@ and is between 256 and 4096 characters. It is defined in the file
acpi_irq_isa= [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
Format: <irq>,<irq>...
acpi_new_pts_ordering [HW,ACPI]
Enforce the ACPI 2.0 ordering of the _PTS control
method wrt putting devices into low power states
default: pre ACPI 2.0 ordering of _PTS
acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT
acpi_no_initrd_override [KNL,ACPI]
Disable loading custom ACPI tables from the initramfs
acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS
Format: To spoof as Windows 98: ="Microsoft Windows"
@ -374,6 +366,12 @@ and is between 256 and 4096 characters. It is defined in the file
possible to determine what the correct size should be.
This option provides an override for these situations.
security= [SECURITY] Choose a security module to enable at boot.
If this boot parameter is not specified, only the first
security module asking for security registration will be
loaded. An invalid security module name will be treated
as if no module has been chosen.
capability.disable=
[SECURITY] Disable capabilities. This would normally
be used only if an alternative security model is to be
@ -383,6 +381,10 @@ and is between 256 and 4096 characters. It is defined in the file
ccw_timeout_log [S390]
See Documentation/s390/CommonIO for details.
cgroup_disable= [KNL] Disable a particular controller
Format: {name of the controller(s) to disable}
{Currently supported controllers - "memory"}
checkreqprot [SELINUX] Set initial checkreqprot flag value.
Format: { "0" | "1" }
See security/selinux/Kconfig help text.
@ -712,7 +714,7 @@ and is between 256 and 4096 characters. It is defined in the file
Format: <cyl>,<head>,<sect>
hd?= [HW] (E)IDE subsystem
hd?lun= See Documentation/ide.txt.
hd?lun= See Documentation/ide/ide.txt.
highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact
size of <nn>. This works even on boxes that have no
@ -735,6 +737,8 @@ and is between 256 and 4096 characters. It is defined in the file
(Don't attempt to blink the leds)
i8042.noaux [HW] Don't check for auxiliary (== mouse) port
i8042.nokbd [HW] Don't check/create keyboard port
i8042.noloop [HW] Disable the AUX Loopback command while probing
for the AUX port
i8042.nomux [HW] Don't check presence of an active multiplexing
controller
i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
@ -765,15 +769,15 @@ and is between 256 and 4096 characters. It is defined in the file
Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
ide= [HW] (E)IDE subsystem
Format: ide=nodma or ide=doubler or ide=reverse
See Documentation/ide.txt.
Format: ide=nodma or ide=doubler
See Documentation/ide/ide.txt.
ide?= [HW] (E)IDE subsystem
Format: ide?=noprobe or chipset specific parameters.
See Documentation/ide.txt.
Format: ide?=ata66 or chipset specific parameters.
See Documentation/ide/ide.txt.
idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed
See Documentation/ide.txt.
See Documentation/ide/ide.txt.
idle= [X86]
Format: idle=poll or idle=mwait
@ -814,6 +818,19 @@ and is between 256 and 4096 characters. It is defined in the file
inttest= [IA64]
iommu= [x86]
off
force
noforce
biomerge
panic
nopanic
merge
nomerge
forcesac
soft
intel_iommu= [DMAR] Intel IOMMU driver (DMAR) option
off
Disable intel iommu driver.
@ -830,6 +847,10 @@ and is between 256 and 4096 characters. It is defined in the file
than 32 bit addressing. The default is to look
for translation below 32 bit and if not available
then look in the higher range.
strict [Default Off]
With this option on every unmap_single operation will
result in a hardware IOTLB flush operation as opposed
to batching them for performance.
io_delay= [X86-32,X86-64] I/O delay method
0x80
@ -846,7 +867,7 @@ and is between 256 and 4096 characters. It is defined in the file
arch/alpha/kernel/core_marvel.c.
ip= [IP_PNP]
See Documentation/nfsroot.txt.
See Documentation/filesystems/nfsroot.txt.
ip2= [HW] Set IO/IRQ pairs for up to 4 IntelliPort boards
See comment before ip2_setup() in
@ -930,8 +951,15 @@ and is between 256 and 4096 characters. It is defined in the file
kstack=N [X86-32,X86-64] Print N words from the kernel stack
in oops dumps.
kgdboc= [HW] kgdb over consoles.
Requires a tty driver that supports console polling.
(only serial suported for now)
Format: <serial_device>[,baud]
l2cr= [PPC]
l3cr= [PPC]
lapic [X86-32,APIC] Enable the local APIC even if BIOS
disabled it.
@ -950,6 +978,41 @@ and is between 256 and 4096 characters. It is defined in the file
when set.
Format: <int>
libata.force= [LIBATA] Force configurations. The format is comma
separated list of "[ID:]VAL" where ID is
PORT[:DEVICE]. PORT and DEVICE are decimal numbers
matching port, link or device. Basically, it matches
the ATA ID string printed on console by libata. If
the whole ID part is omitted, the last PORT and DEVICE
values are used. If ID hasn't been specified yet, the
configuration applies to all ports, links and devices.
If only DEVICE is omitted, the parameter applies to
the port and all links and devices behind it. DEVICE
number of 0 either selects the first device or the
first fan-out link behind PMP device. It does not
select the host link. DEVICE number of 15 selects the
host link and device attached to it.
The VAL specifies the configuration to force. As long
as there's no ambiguity shortcut notation is allowed.
For example, both 1.5 and 1.5G would work for 1.5Gbps.
The following configurations can be forced.
* Cable type: 40c, 80c, short40c, unk, ign or sata.
Any ID with matching PORT is used.
* SATA link speed limit: 1.5Gbps or 3.0Gbps.
* Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7].
udma[/][16,25,33,44,66,100,133] notation is also
allowed.
* [no]ncq: Turn on or off NCQ.
If there are multiple matching configurations changing
the same attribute, the last one is used.
load_ramdisk= [RAM] List of ramdisks to load from floppy
See Documentation/ramdisk.txt.
@ -1056,8 +1119,6 @@ and is between 256 and 4096 characters. It is defined in the file
[SCSI] Maximum number of LUNs received.
Should be between 1 and 16384.
mca-pentium [BUGS=X86-32]
mcatest= [IA-64]
mce [X86-32] Machine Check Exception
@ -1098,6 +1159,15 @@ and is between 256 and 4096 characters. It is defined in the file
memmap=nn[KMG]$ss[KMG]
[KNL,ACPI] Mark specific memory as reserved.
Region of memory to be used, from ss to ss+nn.
Example: Exclude memory from 0x18690000-0x1869ffff
memmap=64K$0x18690000
or
memmap=0x10000$0x18690000
memtest= [KNL,X86_64] Enable memtest
Format: <integer>
range: 0,4 : pattern number
default : 0 <disable>
meye.*= [HW] Set MotionEye Camera parameters
See Documentation/video4linux/meye.txt.
@ -1163,10 +1233,10 @@ and is between 256 and 4096 characters. It is defined in the file
file if at all.
nfsaddrs= [NFS]
See Documentation/nfsroot.txt.
See Documentation/filesystems/nfsroot.txt.
nfsroot= [NFS] nfs root filesystem for disk-less boxes.
See Documentation/nfsroot.txt.
See Documentation/filesystems/nfsroot.txt.
nfs.callback_tcpport=
[NFS] set the TCP port on which the NFSv4 callback
@ -1216,8 +1286,16 @@ and is between 256 and 4096 characters. It is defined in the file
noexec [IA-64]
noexec [X86-32,X86-64]
On X86-32 available only on PAE configured kernels.
noexec=on: enable non-executable mappings (default)
noexec=off: disable nn-executable mappings
noexec=off: disable non-executable mappings
noexec32 [X86-64]
This affects only 32-bit executables.
noexec32=on: enable non-executable mappings (default)
read doesn't imply executable mappings
noexec32=off: disable non-executable mappings
read implies executable mappings
nofxsr [BUGS=X86-32] Disables x86 floating point extended
register save and restore. The kernel will only save
@ -1304,6 +1382,10 @@ and is between 256 and 4096 characters. It is defined in the file
nowb [ARM]
nptcg= [IA64] Override max number of concurrent global TLB
purges which is reported from either PAL_VM_SUMMARY or
SAL PALO.
numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.
one of ['zone', 'node', 'default'] can be specified
This can be set from sysctl after boot.
@ -1393,10 +1475,6 @@ and is between 256 and 4096 characters. It is defined in the file
nomsi [MSI] If the PCI_MSI kernel config parameter is
enabled, this kernel boot option can be used to
disable the use of MSI interrupts system-wide.
nosort [X86-32] Don't sort PCI devices according to
order given by the PCI BIOS. This sorting is
done to get a device order compatible with
older kernels.
biosirq [X86-32] Use PCI BIOS calls to get the interrupt
routing table. These calls are known to be buggy
on several machines and they hang the machine

243
Documentation/kprobes.txt
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@ -192,7 +192,8 @@ code mapping.
The Kprobes API includes a "register" function and an "unregister"
function for each type of probe. Here are terse, mini-man-page
specifications for these functions and the associated probe handlers
that you'll write. See the latter half of this document for examples.
that you'll write. See the files in the samples/kprobes/ sub-directory
for examples.
4.1 register_kprobe
@ -420,249 +421,15 @@ e. Watchpoint probes (which fire on data references).
8. Kprobes Example
Here's a sample kernel module showing the use of kprobes to dump a
stack trace and selected i386 registers when do_fork() is called.
----- cut here -----
/*kprobe_example.c*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/sched.h>
/*For each probe you need to allocate a kprobe structure*/
static struct kprobe kp;
/*kprobe pre_handler: called just before the probed instruction is executed*/
int handler_pre(struct kprobe *p, struct pt_regs *regs)
{
printk("pre_handler: p->addr=0x%p, eip=%lx, eflags=0x%lx\n",
p->addr, regs->eip, regs->eflags);
dump_stack();
return 0;
}
/*kprobe post_handler: called after the probed instruction is executed*/
void handler_post(struct kprobe *p, struct pt_regs *regs, unsigned long flags)
{
printk("post_handler: p->addr=0x%p, eflags=0x%lx\n",
p->addr, regs->eflags);
}
/* fault_handler: this is called if an exception is generated for any
* instruction within the pre- or post-handler, or when Kprobes
* single-steps the probed instruction.
*/
int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr)
{
printk("fault_handler: p->addr=0x%p, trap #%dn",
p->addr, trapnr);
/* Return 0 because we don't handle the fault. */
return 0;
}
static int __init kprobe_init(void)
{
int ret;
kp.pre_handler = handler_pre;
kp.post_handler = handler_post;
kp.fault_handler = handler_fault;
kp.symbol_name = "do_fork";
ret = register_kprobe(&kp);
if (ret < 0) {
printk("register_kprobe failed, returned %d\n", ret);
return ret;
}
printk("kprobe registered\n");
return 0;
}
static void __exit kprobe_exit(void)
{
unregister_kprobe(&kp);
printk("kprobe unregistered\n");
}
module_init(kprobe_init)
module_exit(kprobe_exit)
MODULE_LICENSE("GPL");
----- cut here -----
You can build the kernel module, kprobe-example.ko, using the following
Makefile:
----- cut here -----
obj-m := kprobe-example.o
KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)
default:
$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
clean:
rm -f *.mod.c *.ko *.o
----- cut here -----
$ make
$ su -
...
# insmod kprobe-example.ko
You will see the trace data in /var/log/messages and on the console
whenever do_fork() is invoked to create a new process.
See samples/kprobes/kprobe_example.c
9. Jprobes Example
Here's a sample kernel module showing the use of jprobes to dump
the arguments of do_fork().
----- cut here -----
/*jprobe-example.c */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/uio.h>
#include <linux/kprobes.h>
/*
* Jumper probe for do_fork.
* Mirror principle enables access to arguments of the probed routine
* from the probe handler.
*/
/* Proxy routine having the same arguments as actual do_fork() routine */
long jdo_fork(unsigned long clone_flags, unsigned long stack_start,
struct pt_regs *regs, unsigned long stack_size,
int __user * parent_tidptr, int __user * child_tidptr)
{
printk("jprobe: clone_flags=0x%lx, stack_size=0x%lx, regs=0x%p\n",
clone_flags, stack_size, regs);
/* Always end with a call to jprobe_return(). */
jprobe_return();
/*NOTREACHED*/
return 0;
}
static struct jprobe my_jprobe = {
.entry = jdo_fork
};
static int __init jprobe_init(void)
{
int ret;
my_jprobe.kp.symbol_name = "do_fork";
if ((ret = register_jprobe(&my_jprobe)) <0) {
printk("register_jprobe failed, returned %d\n", ret);
return -1;
}
printk("Planted jprobe at %p, handler addr %p\n",
my_jprobe.kp.addr, my_jprobe.entry);
return 0;
}
static void __exit jprobe_exit(void)
{
unregister_jprobe(&my_jprobe);
printk("jprobe unregistered\n");
}
module_init(jprobe_init)
module_exit(jprobe_exit)
MODULE_LICENSE("GPL");
----- cut here -----
Build and insert the kernel module as shown in the above kprobe
example. You will see the trace data in /var/log/messages and on
the console whenever do_fork() is invoked to create a new process.
(Some messages may be suppressed if syslogd is configured to
eliminate duplicate messages.)
See samples/kprobes/jprobe_example.c
10. Kretprobes Example
Here's a sample kernel module showing the use of return probes to
report failed calls to sys_open().
----- cut here -----
/*kretprobe-example.c*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/ktime.h>
/* per-instance private data */
struct my_data {
ktime_t entry_stamp;
};
static const char *probed_func = "sys_open";
/* Timestamp function entry. */
static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
{
struct my_data *data;
if(!current->mm)
return 1; /* skip kernel threads */
data = (struct my_data *)ri->data;
data->entry_stamp = ktime_get();
return 0;
}
/* If the probed function failed, log the return value and duration.
* Duration may turn out to be zero consistently, depending upon the
* granularity of time accounting on the platform. */
static int return_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
{
int retval = regs_return_value(regs);
struct my_data *data = (struct my_data *)ri->data;
s64 delta;
ktime_t now;
if (retval < 0) {
now = ktime_get();
delta = ktime_to_ns(ktime_sub(now, data->entry_stamp));
printk("%s: return val = %d (duration = %lld ns)\n",
probed_func, retval, delta);
}
return 0;
}
static struct kretprobe my_kretprobe = {
.handler = return_handler,
.entry_handler = entry_handler,
.data_size = sizeof(struct my_data),
.maxactive = 20, /* probe up to 20 instances concurrently */
};
static int __init kretprobe_init(void)
{
int ret;
my_kretprobe.kp.symbol_name = (char *)probed_func;
if ((ret = register_kretprobe(&my_kretprobe)) < 0) {
printk("register_kretprobe failed, returned %d\n", ret);
return -1;
}
printk("Kretprobe active on %s\n", my_kretprobe.kp.symbol_name);
return 0;
}
static void __exit kretprobe_exit(void)
{
unregister_kretprobe(&my_kretprobe);
printk("kretprobe unregistered\n");
/* nmissed > 0 suggests that maxactive was set too low. */
printk("Missed probing %d instances of %s\n",
my_kretprobe.nmissed, probed_func);
}
module_init(kretprobe_init)
module_exit(kretprobe_exit)
MODULE_LICENSE("GPL");
----- cut here -----
Build and insert the kernel module as shown in the above kprobe
example. You will see the trace data in /var/log/messages and on the
console whenever sys_open() returns a negative value. (Some messages
may be suppressed if syslogd is configured to eliminate duplicate
messages.)
See samples/kprobes/kretprobe_example.c
For additional information on Kprobes, refer to the following URLs:
http://www-106.ibm.com/developerworks/library/l-kprobes.html?ca=dgr-lnxw42Kprobe

2
Documentation/laptops/00-INDEX
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@ -2,6 +2,8 @@
- This file
acer-wmi.txt
- information on the Acer Laptop WMI Extras driver.
laptop-mode.txt
- how to conserve battery power using laptop-mode.
sony-laptop.txt
- Sony Notebook Control Driver (SNC) Readme.
sonypi.txt

6
Documentation/laptops/acer-wmi.txt
Просмотреть файл

@ -48,7 +48,7 @@ DSDT.
To send me the DSDT, as root/sudo:
cat /sys/firmware/acpi/DSDT > dsdt
cat /sys/firmware/acpi/tables/DSDT > dsdt
And send me the resulting 'dsdt' file.
@ -80,7 +80,7 @@ once you enable the radio, will depend on your hardware and driver combination.
e.g. With the BCM4318 on the Acer Aspire 5020 series:
ndiswrapper: Light blinks on when transmitting
bcm43xx/b43: Solid light, blinks off when transmitting
b43: Solid light, blinks off when transmitting
Wireless radio control is unconditionally enabled - all Acer laptops that support
acer-wmi come with built-in wireless. However, should you feel so inclined to
@ -169,7 +169,7 @@ can be added to acer-wmi.
The LED is exposed through the LED subsystem, and can be found in:
/sys/devices/platform/acer-wmi/leds/acer-mail:green/
/sys/devices/platform/acer-wmi/leds/acer-wmi::mail/
The mail LED is autodetected, so if you don't have one, the LED device won't
be registered.

0
Documentation/laptop-mode.txt → Documentation/laptops/laptop-mode.txt
Просмотреть файл

63
Documentation/laptops/thinkpad-acpi.txt
Просмотреть файл

@ -160,7 +160,7 @@ Hot keys
procfs: /proc/acpi/ibm/hotkey
sysfs device attribute: hotkey_*
In a ThinkPad, the ACPI HKEY handler is responsible for comunicating
In a ThinkPad, the ACPI HKEY handler is responsible for communicating
some important events and also keyboard hot key presses to the operating
system. Enabling the hotkey functionality of thinkpad-acpi signals the
firmware that such a driver is present, and modifies how the ThinkPad
@ -193,7 +193,7 @@ Not all bits in the mask can be modified. Not all bits that can be
modified do anything. Not all hot keys can be individually controlled
by the mask. Some models do not support the mask at all, and in those
models, hot keys cannot be controlled individually. The behaviour of
the mask is, therefore, higly dependent on the ThinkPad model.
the mask is, therefore, highly dependent on the ThinkPad model.
Note that unmasking some keys prevents their default behavior. For
example, if Fn+F5 is unmasked, that key will no longer enable/disable
@ -288,7 +288,7 @@ sysfs notes:
in ACPI event mode, volume up/down/mute are reported as
separate events, but this behaviour may be corrected in
future releases of this driver, in which case the
ThinkPad volume mixer user interface semanthics will be
ThinkPad volume mixer user interface semantics will be
enforced.
hotkey_poll_freq:
@ -306,13 +306,20 @@ sysfs notes:
The recommended polling frequency is 10Hz.
hotkey_radio_sw:
if the ThinkPad has a hardware radio switch, this
If the ThinkPad has a hardware radio switch, this
attribute will read 0 if the switch is in the "radios
disabled" postition, and 1 if the switch is in the
disabled" position, and 1 if the switch is in the
"radios enabled" position.
This attribute has poll()/select() support.
hotkey_tablet_mode:
If the ThinkPad has tablet capabilities, this attribute
will read 0 if the ThinkPad is in normal mode, and
1 if the ThinkPad is in tablet mode.
This attribute has poll()/select() support.
hotkey_report_mode:
Returns the state of the procfs ACPI event report mode
filter for hot keys. If it is set to 1 (the default),
@ -339,7 +346,7 @@ sysfs notes:
wakeup_hotunplug_complete:
Set to 1 if the system was waken up because of an
undock or bay ejection request, and that request
was sucessfully completed. At this point, it might
was successfully completed. At this point, it might
be useful to send the system back to sleep, at the
user's choice. Refer to HKEY events 0x4003 and
0x3003, below.
@ -392,7 +399,7 @@ event code Key Notes
Lenovo: battery
0x1004 0x03 FN+F4 Sleep button (ACPI sleep button
semanthics, i.e. sleep-to-RAM).
semantics, i.e. sleep-to-RAM).
It is always generate some kind
of event, either the hot key
event or a ACPI sleep button
@ -403,12 +410,12 @@ event code Key Notes
time passes.
0x1005 0x04 FN+F5 Radio. Enables/disables
the internal BlueTooth hardware
the internal Bluetooth hardware
and W-WAN card if left in control
of the firmware. Does not affect
the WLAN card.
Should be used to turn on/off all
radios (bluetooth+W-WAN+WLAN),
radios (Bluetooth+W-WAN+WLAN),
really.
0x1006 0x05 FN+F6 -
@ -417,7 +424,7 @@ event code Key Notes
Do you feel lucky today?
0x1008 0x07 FN+F8 IBM: toggle screen expand
Lenovo: configure ultranav
Lenovo: configure UltraNav
0x1009 0x08 FN+F9 -
.. .. ..
@ -447,7 +454,7 @@ event code Key Notes
0x1011 0x10 FN+END Brightness down. See brightness
up for details.
0x1012 0x11 FN+PGUP Thinklight toggle. This key is
0x1012 0x11 FN+PGUP ThinkLight toggle. This key is
always handled by the firmware,
even when unmasked.
@ -469,7 +476,7 @@ event code Key Notes
key is always handled by the
firmware, even when unmasked.
0x1018 0x17 THINKPAD Thinkpad/Access IBM/Lenovo key
0x1018 0x17 THINKPAD ThinkPad/Access IBM/Lenovo key
0x1019 0x18 unknown
.. .. ..
@ -488,9 +495,17 @@ If a key is mapped to KEY_UNKNOWN, it generates an input event that
includes an scan code. If a key is mapped to anything else, it will
generate input device EV_KEY events.
In addition to the EV_KEY events, thinkpad-acpi may also issue EV_SW
events for switches:
SW_RADIO T60 and later hardare rfkill rocker switch
SW_TABLET_MODE Tablet ThinkPads HKEY events 0x5009 and 0x500A
Non hot-key ACPI HKEY event map:
0x5001 Lid closed
0x5002 Lid opened
0x5009 Tablet swivel: switched to tablet mode
0x500A Tablet swivel: switched to normal mode
0x7000 Radio Switch may have changed state
The above events are not propagated by the driver, except for legacy
@ -505,9 +520,7 @@ The above events are never propagated by the driver.
0x3003 Bay ejection (see 0x2x05) complete, can sleep again
0x4003 Undocked (see 0x2x04), can sleep again
0x5009 Tablet swivel: switched to tablet mode
0x500A Tablet swivel: switched to normal mode
0x500B Tablet pen insterted into its storage bay
0x500B Tablet pen inserted into its storage bay
0x500C Tablet pen removed from its storage bay
0x5010 Brightness level changed (newer Lenovo BIOSes)
@ -539,7 +552,7 @@ sysfs (it is read-only).
If the hotkey_report_mode module parameter is set to 1 or 2, it cannot
be changed later through sysfs (any writes will return -EPERM to signal
that hotkey_report_mode was locked. On 2.6.23 and later, where
hotkey_report_mode cannot be changed at all, writes will return -EACES).
hotkey_report_mode cannot be changed at all, writes will return -EACCES).
hotkey_report_mode set to 1 makes the driver export through the procfs
ACPI event interface all hot key presses (which are *also* sent to the
@ -584,7 +597,7 @@ Sysfs notes:
0: disables Bluetooth / Bluetooth is disabled
1: enables Bluetooth / Bluetooth is enabled.
Note: this interface will be probably be superseeded by the
Note: this interface will be probably be superseded by the
generic rfkill class, so it is NOT to be considered stable yet.
Video output control -- /proc/acpi/ibm/video
@ -791,12 +804,12 @@ on the X40 (tpb is the ThinkPad Buttons utility):
1 - Related to "Volume up" key press
2 - Related to "Mute on" key press
3 - Related to "Access IBM" key press
4 - Related to "LCD brightness up" key pess
4 - Related to "LCD brightness up" key press
5 - Related to "LCD brightness down" key press
11 - Related to "toggle screen expansion" key press/function
12 - Related to "ThinkLight on"
13 - Related to "ThinkLight off"
14 - Related to "ThinkLight" key press (toggle thinklight)
14 - Related to "ThinkLight" key press (toggle ThinkLight)
The cmos command interface is prone to firmware split-brain problems, as
in newer ThinkPads it is just a compatibility layer. Do not use it, it is
@ -1024,7 +1037,7 @@ There are two interfaces to the firmware for direct brightness control,
EC and CMOS. To select which one should be used, use the
brightness_mode module parameter: brightness_mode=1 selects EC mode,
brightness_mode=2 selects CMOS mode, brightness_mode=3 selects both EC
and CMOS. The driver tries to autodetect which interface to use.
and CMOS. The driver tries to auto-detect which interface to use.
When display backlight brightness controls are available through the
standard ACPI interface, it is best to use it instead of this direct
@ -1266,8 +1279,8 @@ experimental=1 parameter when loading the module.
This feature shows the presence and current state of a W-WAN (Sierra
Wireless EV-DO) device.
It was tested on a Lenovo Thinkpad X60. It should probably work on other
Thinkpad models which come with this module installed.
It was tested on a Lenovo ThinkPad X60. It should probably work on other
ThinkPad models which come with this module installed.
Procfs notes:
@ -1286,7 +1299,7 @@ Sysfs notes:
0: disables WWAN card / WWAN card is disabled
1: enables WWAN card / WWAN card is enabled.
Note: this interface will be probably be superseeded by the
Note: this interface will be probably be superseded by the
generic rfkill class, so it is NOT to be considered stable yet.
Multiple Commands, Module Parameters
@ -1309,7 +1322,7 @@ Enabling debugging output
The module takes a debug parameter which can be used to selectively
enable various classes of debugging output, for example:
modprobe ibm_acpi debug=0xffff
modprobe thinkpad_acpi debug=0xffff
will enable all debugging output classes. It takes a bitmask, so
to enable more than one output class, just add their values.
@ -1356,7 +1369,7 @@ Sysfs interface changelog:
NVRAM is compiled out by the user because it is
unneeded/undesired in the first place).
0x020101: Marker for thinkpad-acpi with hot key NVRAM polling
and proper hotkey_mask semanthics (version 8 of the
and proper hotkey_mask semantics (version 8 of the
NVRAM polling patch). Some development snapshots of
0.18 had an earlier version that did strange things
to hotkey_mask.

75
Documentation/lguest/lguest.c
Просмотреть файл

@ -1,7 +1,7 @@
/*P:100 This is the Launcher code, a simple program which lays out the
* "physical" memory for the new Guest by mapping the kernel image and the
* virtual devices, then reads repeatedly from /dev/lguest to run the Guest.
:*/
* "physical" memory for the new Guest by mapping the kernel image and
* the virtual devices, then opens /dev/lguest to tell the kernel
* about the Guest and control it. :*/
#define _LARGEFILE64_SOURCE
#define _GNU_SOURCE
#include <stdio.h>
@ -43,7 +43,7 @@
#include "linux/virtio_console.h"
#include "linux/virtio_ring.h"
#include "asm-x86/bootparam.h"
/*L:110 We can ignore the 38 include files we need for this program, but I do
/*L:110 We can ignore the 39 include files we need for this program, but I do
* want to draw attention to the use of kernel-style types.
*
* As Linus said, "C is a Spartan language, and so should your naming be." I
@ -320,7 +320,7 @@ static unsigned long map_elf(int elf_fd, const Elf32_Ehdr *ehdr)
err(1, "Reading program headers");
/* Try all the headers: there are usually only three. A read-only one,
* a read-write one, and a "note" section which isn't loadable. */
* a read-write one, and a "note" section which we don't load. */
for (i = 0; i < ehdr->e_phnum; i++) {
/* If this isn't a loadable segment, we ignore it */
if (phdr[i].p_type != PT_LOAD)
@ -387,7 +387,7 @@ static unsigned long load_kernel(int fd)
if (memcmp(hdr.e_ident, ELFMAG, SELFMAG) == 0)
return map_elf(fd, &hdr);
/* Otherwise we assume it's a bzImage, and try to unpack it */
/* Otherwise we assume it's a bzImage, and try to load it. */
return load_bzimage(fd);
}
@ -433,12 +433,12 @@ static unsigned long load_initrd(const char *name, unsigned long mem)
return len;
}
/* Once we know how much memory we have, we can construct simple linear page
/* Once we know how much memory we have we can construct simple linear page
* tables which set virtual == physical which will get the Guest far enough
* into the boot to create its own.
*
* We lay them out of the way, just below the initrd (which is why we need to
* know its size). */
* know its size here). */
static unsigned long setup_pagetables(unsigned long mem,
unsigned long initrd_size)
{
@ -486,9 +486,12 @@ static void concat(char *dst, char *args[])
unsigned int i, len = 0;
for (i = 0; args[i]; i++) {
strcpy(dst+len, args[i]);
if (i) {
strcat(dst+len, " ");
len += strlen(args[i]) + 1;
len++;
}
strcpy(dst+len, args[i]);
len += strlen(args[i]);
}
/* In case it's empty. */
dst[len] = '\0';
@ -847,7 +850,8 @@ static void handle_console_output(int fd, struct virtqueue *vq)
*
* Handling output for network is also simple: we get all the output buffers
* and write them (ignoring the first element) to this device's file descriptor
* (stdout). */
* (/dev/net/tun).
*/
static void handle_net_output(int fd, struct virtqueue *vq)
{
unsigned int head, out, in;
@ -921,7 +925,7 @@ static void enable_fd(int fd, struct virtqueue *vq)
write(waker_fd, &vq->dev->fd, sizeof(vq->dev->fd));
}
/* Resetting a device is fairly easy. */
/* When the Guest asks us to reset a device, it's is fairly easy. */
static void reset_device(struct device *dev)
{
struct virtqueue *vq;
@ -1000,8 +1004,8 @@ static void handle_input(int fd)
if (select(devices.max_infd+1, &fds, NULL, NULL, &poll) == 0)
break;
/* Otherwise, call the device(s) which have readable
* file descriptors and a method of handling them. */
/* Otherwise, call the device(s) which have readable file
* descriptors and a method of handling them. */
for (i = devices.dev; i; i = i->next) {
if (i->handle_input && FD_ISSET(i->fd, &fds)) {
int dev_fd;
@ -1012,8 +1016,7 @@ static void handle_input(int fd)
* should no longer service it. Networking and
* console do this when there's no input
* buffers to deliver into. Console also uses
* it when it discovers that stdin is
* closed. */
* it when it discovers that stdin is closed. */
FD_CLR(i->fd, &devices.infds);
/* Tell waker to ignore it too, by sending a
* negative fd number (-1, since 0 is a valid
@ -1030,7 +1033,8 @@ static void handle_input(int fd)
*
* All devices need a descriptor so the Guest knows it exists, and a "struct
* device" so the Launcher can keep track of it. We have common helper
* routines to allocate and manage them. */
* routines to allocate and manage them.
*/
/* The layout of the device page is a "struct lguest_device_desc" followed by a
* number of virtqueue descriptors, then two sets of feature bits, then an
@ -1075,7 +1079,7 @@ static void add_virtqueue(struct device *dev, unsigned int num_descs,
struct virtqueue **i, *vq = malloc(sizeof(*vq));
void *p;
/* First we need some pages for this virtqueue. */
/* First we need some memory for this virtqueue. */
pages = (vring_size(num_descs, getpagesize()) + getpagesize() - 1)
/ getpagesize();
p = get_pages(pages);
@ -1119,7 +1123,7 @@ static void add_virtqueue(struct device *dev, unsigned int num_descs,
}
/* The first half of the feature bitmask is for us to advertise features. The
* second half if for the Guest to accept features. */
* second half is for the Guest to accept features. */
static void add_feature(struct device *dev, unsigned bit)
{
u8 *features = get_feature_bits(dev);
@ -1148,7 +1152,9 @@ static void set_config(struct device *dev, unsigned len, const void *conf)
}
/* This routine does all the creation and setup of a new device, including
* calling new_dev_desc() to allocate the descriptor and device memory. */
* calling new_dev_desc() to allocate the descriptor and device memory.
*
* See what I mean about userspace being boring? */
static struct device *new_device(const char *name, u16 type, int fd,
bool (*handle_input)(int, struct device *))
{
@ -1380,7 +1386,6 @@ struct vblk_info
* Launcher triggers interrupt to Guest. */
int done_fd;
};
/*:*/
/*L:210
* The Disk
@ -1490,7 +1495,10 @@ static int io_thread(void *_dev)
while (read(vblk->workpipe[0], &c, 1) == 1) {
/* We acknowledge each request immediately to reduce latency,
* rather than waiting until we've done them all. I haven't
* measured to see if it makes any difference. */
* measured to see if it makes any difference.
*
* That would be an interesting test, wouldn't it? You could
* also try having more than one I/O thread. */
while (service_io(dev))
write(vblk->done_fd, &c, 1);
}
@ -1498,7 +1506,7 @@ static int io_thread(void *_dev)
}
/* Now we've seen the I/O thread, we return to the Launcher to see what happens
* when the thread tells us it's completed some I/O. */
* when that thread tells us it's completed some I/O. */
static bool handle_io_finish(int fd, struct device *dev)
{
char c;
@ -1570,7 +1578,8 @@ static void setup_block_file(const char *filename)
* more work. */
pipe(vblk->workpipe);
/* Create stack for thread and run it */
/* Create stack for thread and run it. Since stack grows upwards, we
* point the stack pointer to the end of this region. */
stack = malloc(32768);
/* SIGCHLD - We dont "wait" for our cloned thread, so prevent it from
* becoming a zombie. */
@ -1584,14 +1593,14 @@ static void setup_block_file(const char *filename)
verbose("device %u: virtblock %llu sectors\n",
devices.device_num, le64_to_cpu(conf.capacity));
}
/* That's the end of device setup. :*/
/* That's the end of device setup. */
/* Reboot */
/*L:230 Reboot is pretty easy: clean up and exec() the Launcher afresh. */
static void __attribute__((noreturn)) restart_guest(void)
{
unsigned int i;
/* Closing pipes causes the waker thread and io_threads to die, and
/* Closing pipes causes the Waker thread and io_threads to die, and
* closing /dev/lguest cleans up the Guest. Since we don't track all
* open fds, we simply close everything beyond stderr. */
for (i = 3; i < FD_SETSIZE; i++)
@ -1600,7 +1609,7 @@ static void __attribute__((noreturn)) restart_guest(void)
err(1, "Could not exec %s", main_args[0]);
}
/*L:220 Finally we reach the core of the Launcher, which runs the Guest, serves
/*L:220 Finally we reach the core of the Launcher which runs the Guest, serves
* its input and output, and finally, lays it to rest. */
static void __attribute__((noreturn)) run_guest(int lguest_fd)
{
@ -1641,7 +1650,7 @@ static void __attribute__((noreturn)) run_guest(int lguest_fd)
err(1, "Resetting break");
}
}
/*
/*L:240
* This is the end of the Launcher. The good news: we are over halfway
* through! The bad news: the most fiendish part of the code still lies ahead
* of us.
@ -1688,8 +1697,8 @@ int main(int argc, char *argv[])
* device receive input from a file descriptor, we keep an fdset
* (infds) and the maximum fd number (max_infd) with the head of the
* list. We also keep a pointer to the last device. Finally, we keep
* the next interrupt number to hand out (1: remember that 0 is used by
* the timer). */
* the next interrupt number to use for devices (1: remember that 0 is
* used by the timer). */
FD_ZERO(&devices.infds);
devices.max_infd = -1;
devices.lastdev = NULL;
@ -1790,8 +1799,8 @@ int main(int argc, char *argv[])
lguest_fd = tell_kernel(pgdir, start);
/* We fork off a child process, which wakes the Launcher whenever one
* of the input file descriptors needs attention. Otherwise we would
* run the Guest until it tries to output something. */
* of the input file descriptors needs attention. We call this the
* Waker, and we'll cover it in a moment. */
waker_fd = setup_waker(lguest_fd);
/* Finally, run the Guest. This doesn't return. */

13
Documentation/lguest/lguest.txt
Просмотреть файл

@ -1,6 +1,7 @@
Rusty's Remarkably Unreliable Guide to Lguest
- or, A Young Coder's Illustrated Hypervisor
http://lguest.ozlabs.org
__
(___()'`; Rusty's Remarkably Unreliable Guide to Lguest
/, /` - or, A Young Coder's Illustrated Hypervisor
\\"--\\ http://lguest.ozlabs.org
Lguest is designed to be a minimal hypervisor for the Linux kernel, for
Linux developers and users to experiment with virtualization with the
@ -41,9 +42,13 @@ Running Lguest:
CONFIG_PHYSICAL_ALIGN=0x100000)
"Device Drivers":
"Block devices"
"Virtio block driver (EXPERIMENTAL)" = M/Y
"Network device support"
"Universal TUN/TAP device driver support" = M/Y
(CONFIG_TUN=m)
"Virtio network driver (EXPERIMENTAL)" = M/Y
(CONFIG_VIRTIO_BLK=m, CONFIG_VIRTIO_NET=m and CONFIG_TUN=m)
"Virtualization"
"Linux hypervisor example code" = M/Y
(CONFIG_LGUEST=m)

1
Documentation/magic-number.txt
Просмотреть файл

@ -95,7 +95,6 @@ RFCOMM_TTY_MAGIC 0x6d02 net/bluetooth/rfcomm/tty.c
USB_SERIAL_PORT_MAGIC 0x7301 usb_serial_port drivers/usb/serial/usb-serial.h
CG_MAGIC 0x00090255 ufs_cylinder_group include/linux/ufs_fs.h
A2232_MAGIC 0x000a2232 gs_port drivers/char/ser_a2232.h
SOLARIS_SOCKET_MAGIC 0x000ADDED sol_socket_struct arch/sparc64/solaris/socksys.h
RPORT_MAGIC 0x00525001 r_port drivers/char/rocket_int.h
LSEMAGIC 0x05091998 lse drivers/fc4/fc.c
GDTIOCTL_MAGIC 0x06030f07 gdth_iowr_str drivers/scsi/gdth_ioctl.h

17
Documentation/mca.txt
Просмотреть файл

@ -143,14 +143,7 @@ MCA Device Drivers
Currently, there are a number of MCA-specific device drivers.
1) PS/2 ESDI
drivers/block/ps2esdi.c
include/linux/ps2esdi.h
Uses major number 36, and should use /dev files /dev/eda, /dev/edb.
Supports two drives, but only one controller. May use the
command-line args "ed=cyl,head,sec" and "tp720".
2) PS/2 SCSI
1) PS/2 SCSI
drivers/scsi/ibmmca.c
drivers/scsi/ibmmca.h
The driver for the IBM SCSI subsystem. Includes both integrated
@ -159,25 +152,25 @@ Currently, there are a number of MCA-specific device drivers.
machine with a front-panel display (i.e. model 95), you can use
"ibmmcascsi=display" to enable a drive activity indicator.
3) 3c523
2) 3c523
drivers/net/3c523.c
drivers/net/3c523.h
3Com 3c523 Etherlink/MC ethernet driver.
4) SMC Ultra/MCA and IBM Adapter/A
3) SMC Ultra/MCA and IBM Adapter/A
drivers/net/smc-mca.c
drivers/net/smc-mca.h
Driver for the MCA version of the SMC Ultra and various other
OEM'ed and work-alike cards (Elite, Adapter/A, etc).
5) NE/2
4) NE/2
driver/net/ne2.c
driver/net/ne2.h
The NE/2 is the MCA version of the NE2000. This may not work
with clones that have a different adapter id than the original
NE/2.
6) Future Domain MCS-600/700, OEM'd IBM Fast SCSI Adapter/A and
5) Future Domain MCS-600/700, OEM'd IBM Fast SCSI Adapter/A and
Reply Sound Blaster/SCSI (SCSI part)
Better support for these cards than the driver for ISA.
Supports multiple cards with IRQ sharing.

6
Documentation/memory-barriers.txt
Просмотреть файл

@ -430,8 +430,8 @@ There are certain things that the Linux kernel memory barriers do not guarantee:
[*] For information on bus mastering DMA and coherency please read:
Documentation/pci.txt
Documentation/DMA-mapping.txt
Documentation/PCI/pci.txt
Documentation/PCI/PCI-DMA-mapping.txt
Documentation/DMA-API.txt
@ -1493,7 +1493,7 @@ explicit lock operations, described later). These include:
atomic_dec_and_test();
atomic_sub_and_test();
atomic_add_negative();
atomic_add_unless();
atomic_add_unless(); /* when succeeds (returns 1) */
test_and_set_bit();
test_and_clear_bit();
test_and_change_bit();

5
Documentation/networking/00-INDEX
Просмотреть файл

@ -84,9 +84,6 @@ policy-routing.txt
- IP policy-based routing
ray_cs.txt
- Raylink Wireless LAN card driver info.
sk98lin.txt
- Marvell Yukon Chipset / SysKonnect SK-98xx compliant Gigabit
Ethernet Adapter family driver info
skfp.txt
- SysKonnect FDDI (SK-5xxx, Compaq Netelligent) driver info.
smc9.txt
@ -103,8 +100,6 @@ tuntap.txt
- TUN/TAP device driver, allowing user space Rx/Tx of packets.
vortex.txt
- info on using 3Com Vortex (3c590, 3c592, 3c595, 3c597) Ethernet cards.
wan-router.txt
- WAN router documentation
wavelan.txt
- AT&T GIS (nee NCR) WaveLAN card: An Ethernet-like radio transceiver
x25.txt

89
Documentation/networking/bcm43xx.txt
Просмотреть файл

@ -1,89 +0,0 @@
BCM43xx Linux Driver Project
============================
Introduction
------------
Many of the wireless devices found in modern notebook computers are
based on the wireless chips produced by Broadcom. These devices have
been a problem for Linux users as there is no open-source driver
available. In addition, Broadcom has not released specifications
for the device, and driver availability has been limited to the
binary-only form used in the GPL versions of AP hardware such as the
Linksys WRT54G, and the Windows and OS X drivers. Before this project
began, the only way to use these devices were to use the Windows or
OS X drivers with either the Linuxant or ndiswrapper modules. There
is a strong penalty if this method is used as loading the binary-only
module "taints" the kernel, and no kernel developer will help diagnose
any kernel problems.
Development
-----------
This driver has been developed using
a clean-room technique that is described at
http://bcm-specs.sipsolutions.net/ReverseEngineeringProcess. For legal
reasons, none of the clean-room crew works on the on the Linux driver,
and none of the Linux developers sees anything but the specifications,
which are the ultimate product of the reverse-engineering group.
Software
--------
Since the release of the 2.6.17 kernel, the bcm43xx driver has been
distributed with the kernel source, and is prebuilt in most, if not
all, distributions. There is, however, additional software that is
required. The firmware used by the chip is the intellectual property
of Broadcom and they have not given the bcm43xx team redistribution
rights to this firmware. Since we cannot legally redistribute
the firmware we cannot include it with the driver. Furthermore, it
cannot be placed in the downloadable archives of any distributing
organization; therefore, the user is responsible for obtaining the
firmware and placing it in the appropriate location so that the driver
can find it when initializing.
To help with this process, the bcm43xx developers provide a separate
program named bcm43xx-fwcutter to "cut" the firmware out of a
Windows or OS X driver and write the extracted files to the proper
location. This program is usually provided with the distribution;
however, it may be downloaded from
http://developer.berlios.de/project/showfiles.php?group_id=4547
The firmware is available in two versions. V3 firmware is used with
the in-kernel bcm43xx driver that uses a software MAC layer called
SoftMAC, and will have a microcode revision of 0x127 or smaller. The
V4 firmware is used by an out-of-kernel driver employing a variation of
the Devicescape MAC layer known as d80211. Once bcm43xx-d80211 reaches
a satisfactory level of development, it will replace bcm43xx-softmac
in the kernel as it is much more flexible and powerful.
A source for the latest V3 firmware is
http://downloads.openwrt.org/sources/wl_apsta-3.130.20.0.o
Once this file is downloaded, the command
'bcm43xx-fwcutter -w <dir> <filename>'
will extract the microcode and write it to directory
<dir>. The correct directory will depend on your distribution;
however, most use '/lib/firmware'. Once this step is completed,
the bcm3xx driver should load when the system is booted. To see
any messages relating to the driver, issue the command 'dmesg |
grep bcm43xx' from a terminal window. If there are any problems,
please send that output to Bcm43xx-dev@lists.berlios.de.
Although the driver has been in-kernel since 2.6.17, the earliest
version is quite limited in its capability. Patches that include
all features of later versions are available for the stable kernel
versions from 2.6.18. These will be needed if you use a BCM4318,
or a PCI Express version (BCM4311 and BCM4312). In addition, if you
have an early BCM4306 and more than 1 GB RAM, your kernel will need
to be patched. These patches, which are being updated regularly,
are available at ftp://lwfinger.dynalias.org/patches. Look for
combined_2.6.YY.patch. Of course you will need kernel source downloaded
from kernel.org, or the source from your distribution.
If you build your own kernel, please enable CONFIG_BCM43XX_DEBUG
and CONFIG_IEEE80211_SOFTMAC_DEBUG. The log information provided is
essential for solving any problems.

8
Documentation/networking/can.txt
Просмотреть файл

@ -281,10 +281,10 @@ solution for a couple of reasons:
sa_family_t can_family;
int can_ifindex;
union {
struct { canid_t rx_id, tx_id; } tp16;
struct { canid_t rx_id, tx_id; } tp20;
struct { canid_t rx_id, tx_id; } mcnet;
struct { canid_t rx_id, tx_id; } isotp;
/* transport protocol class address info (e.g. ISOTP) */
struct { canid_t rx_id, tx_id; } tp;
/* reserved for future CAN protocols address information */
} can_addr;
};

568
Documentation/networking/sk98lin.txt
Просмотреть файл

@ -1,568 +0,0 @@
(C)Copyright 1999-2004 Marvell(R).
All rights reserved
===========================================================================
sk98lin.txt created 13-Feb-2004
Readme File for sk98lin v6.23
Marvell Yukon/SysKonnect SK-98xx Gigabit Ethernet Adapter family driver for LINUX
This file contains
1 Overview
2 Required Files
3 Installation
3.1 Driver Installation
3.2 Inclusion of adapter at system start
4 Driver Parameters
4.1 Per-Port Parameters
4.2 Adapter Parameters
5 Large Frame Support
6 VLAN and Link Aggregation Support (IEEE 802.1, 802.1q, 802.3ad)
7 Troubleshooting
===========================================================================
1 Overview
===========
The sk98lin driver supports the Marvell Yukon and SysKonnect
SK-98xx/SK-95xx compliant Gigabit Ethernet Adapter on Linux. It has
been tested with Linux on Intel/x86 machines.
***
2 Required Files
=================
The linux kernel source.
No additional files required.
***
3 Installation
===============
It is recommended to download the latest version of the driver from the
SysKonnect web site www.syskonnect.com. If you have downloaded the latest
driver, the Linux kernel has to be patched before the driver can be
installed. For details on how to patch a Linux kernel, refer to the
patch.txt file.
3.1 Driver Installation
------------------------
The following steps describe the actions that are required to install
the driver and to start it manually. These steps should be carried
out for the initial driver setup. Once confirmed to be ok, they can
be included in the system start.
NOTE 1: To perform the following tasks you need 'root' access.
NOTE 2: In case of problems, please read the section "Troubleshooting"
below.
The driver can either be integrated into the kernel or it can be compiled
as a module. Select the appropriate option during the kernel
configuration.
Compile/use the driver as a module
----------------------------------
To compile the driver, go to the directory /usr/src/linux and
execute the command "make menuconfig" or "make xconfig" and proceed as
follows:
To integrate the driver permanently into the kernel, proceed as follows:
1. Select the menu "Network device support" and then "Ethernet(1000Mbit)"
2. Mark "Marvell Yukon Chipset / SysKonnect SK-98xx family support"
with (*)
3. Build a new kernel when the configuration of the above options is
finished.
4. Install the new kernel.
5. Reboot your system.
To use the driver as a module, proceed as follows:
1. Enable 'loadable module support' in the kernel.
2. For automatic driver start, enable the 'Kernel module loader'.
3. Select the menu "Network device support" and then "Ethernet(1000Mbit)"
4. Mark "Marvell Yukon Chipset / SysKonnect SK-98xx family support"
with (M)
5. Execute the command "make modules".
6. Execute the command "make modules_install".
The appropriate modules will be installed.
7. Reboot your system.
Load the module manually
------------------------
To load the module manually, proceed as follows:
1. Enter "modprobe sk98lin".
2. If a Marvell Yukon or SysKonnect SK-98xx adapter is installed in
your computer and you have a /proc file system, execute the command:
"ls /proc/net/sk98lin/"
This should produce an output containing a line with the following
format:
eth0 eth1 ...
which indicates that your adapter has been found and initialized.
NOTE 1: If you have more than one Marvell Yukon or SysKonnect SK-98xx
adapter installed, the adapters will be listed as 'eth0',
'eth1', 'eth2', etc.
For each adapter, repeat steps 3 and 4 below.
NOTE 2: If you have other Ethernet adapters installed, your Marvell
Yukon or SysKonnect SK-98xx adapter will be mapped to the
next available number, e.g. 'eth1'. The mapping is executed
automatically.
The module installation message (displayed either in a system
log file or on the console) prints a line for each adapter
found containing the corresponding 'ethX'.
3. Select an IP address and assign it to the respective adapter by
entering:
ifconfig eth0 <ip-address>
With this command, the adapter is connected to the Ethernet.
SK-98xx Gigabit Ethernet Server Adapters: The yellow LED on the adapter
is now active, the link status LED of the primary port is active and
the link status LED of the secondary port (on dual port adapters) is
blinking (if the ports are connected to a switch or hub).
SK-98xx V2.0 Gigabit Ethernet Adapters: The link status LED is active.
In addition, you will receive a status message on the console stating
"ethX: network connection up using port Y" and showing the selected
connection parameters (x stands for the ethernet device number
(0,1,2, etc), y stands for the port name (A or B)).
NOTE: If you are in doubt about IP addresses, ask your network
administrator for assistance.
4. Your adapter should now be fully operational.
Use 'ping <otherstation>' to verify the connection to other computers
on your network.
5. To check the adapter configuration view /proc/net/sk98lin/[devicename].
For example by executing:
"cat /proc/net/sk98lin/eth0"
Unload the module
-----------------
To stop and unload the driver modules, proceed as follows:
1. Execute the command "ifconfig eth0 down".
2. Execute the command "rmmod sk98lin".
3.2 Inclusion of adapter at system start
-----------------------------------------
Since a large number of different Linux distributions are
available, we are unable to describe a general installation procedure
for the driver module.
Because the driver is now integrated in the kernel, installation should
be easy, using the standard mechanism of your distribution.
Refer to the distribution's manual for installation of ethernet adapters.
***
4 Driver Parameters
====================
Parameters can be set at the command line after the module has been
loaded with the command 'modprobe'.
In some distributions, the configuration tools are able to pass parameters
to the driver module.
If you use the kernel module loader, you can set driver parameters
in the file /etc/modprobe.conf (or /etc/modules.conf in 2.4 or earlier).
To set the driver parameters in this file, proceed as follows:
1. Insert a line of the form :
options sk98lin ...
For "...", the same syntax is required as described for the command
line parameters of modprobe below.
2. To activate the new parameters, either reboot your computer
or
unload and reload the driver.
The syntax of the driver parameters is:
modprobe sk98lin parameter=value1[,value2[,value3...]]
where value1 refers to the first adapter, value2 to the second etc.
NOTE: All parameters are case sensitive. Write them exactly as shown
below.
Example:
Suppose you have two adapters. You want to set auto-negotiation
on the first adapter to ON and on the second adapter to OFF.
You also want to set DuplexCapabilities on the first adapter
to FULL, and on the second adapter to HALF.
Then, you must enter:
modprobe sk98lin AutoNeg_A=On,Off DupCap_A=Full,Half
NOTE: The number of adapters that can be configured this way is
limited in the driver (file skge.c, constant SK_MAX_CARD_PARAM).
The current limit is 16. If you happen to install
more adapters, adjust this and recompile.
4.1 Per-Port Parameters
------------------------
These settings are available for each port on the adapter.
In the following description, '?' stands for the port for
which you set the parameter (A or B).
Speed
-----
Parameter: Speed_?
Values: 10, 100, 1000, Auto
Default: Auto
This parameter is used to set the speed capabilities. It is only valid
for the SK-98xx V2.0 copper adapters.
Usually, the speed is negotiated between the two ports during link
establishment. If this fails, a port can be forced to a specific setting
with this parameter.
Auto-Negotiation
----------------
Parameter: AutoNeg_?
Values: On, Off, Sense
Default: On
The "Sense"-mode automatically detects whether the link partner supports
auto-negotiation or not.
Duplex Capabilities
-------------------
Parameter: DupCap_?
Values: Half, Full, Both
Default: Both
This parameters is only relevant if auto-negotiation for this port is
not set to "Sense". If auto-negotiation is set to "On", all three values
are possible. If it is set to "Off", only "Full" and "Half" are allowed.
This parameter is useful if your link partner does not support all
possible combinations.
Flow Control
------------
Parameter: FlowCtrl_?
Values: Sym, SymOrRem, LocSend, None
Default: SymOrRem
This parameter can be used to set the flow control capabilities the
port reports during auto-negotiation. It can be set for each port
individually.
Possible modes:
-- Sym = Symmetric: both link partners are allowed to send
PAUSE frames
-- SymOrRem = SymmetricOrRemote: both or only remote partner
are allowed to send PAUSE frames
-- LocSend = LocalSend: only local link partner is allowed
to send PAUSE frames
-- None = no link partner is allowed to send PAUSE frames
NOTE: This parameter is ignored if auto-negotiation is set to "Off".
Role in Master-Slave-Negotiation (1000Base-T only)
--------------------------------------------------
Parameter: Role_?
Values: Auto, Master, Slave
Default: Auto
This parameter is only valid for the SK-9821 and SK-9822 adapters.
For two 1000Base-T ports to communicate, one must take the role of the
master (providing timing information), while the other must be the
slave. Usually, this is negotiated between the two ports during link
establishment. If this fails, a port can be forced to a specific setting
with this parameter.
4.2 Adapter Parameters
-----------------------
Connection Type (SK-98xx V2.0 copper adapters only)
---------------
Parameter: ConType
Values: Auto, 100FD, 100HD, 10FD, 10HD
Default: Auto
The parameter 'ConType' is a combination of all five per-port parameters
within one single parameter. This simplifies the configuration of both ports
of an adapter card! The different values of this variable reflect the most
meaningful combinations of port parameters.
The following table shows the values of 'ConType' and the corresponding
combinations of the per-port parameters:
ConType | DupCap AutoNeg FlowCtrl Role Speed
----------+------------------------------------------------------
Auto | Both On SymOrRem Auto Auto
100FD | Full Off None Auto (ignored) 100
100HD | Half Off None Auto (ignored) 100
10FD | Full Off None Auto (ignored) 10
10HD | Half Off None Auto (ignored) 10
Stating any other port parameter together with this 'ConType' variable
will result in a merged configuration of those settings. This due to
the fact, that the per-port parameters (e.g. Speed_? ) have a higher
priority than the combined variable 'ConType'.
NOTE: This parameter is always used on both ports of the adapter card.
Interrupt Moderation
--------------------
Parameter: Moderation
Values: None, Static, Dynamic
Default: None
Interrupt moderation is employed to limit the maximum number of interrupts
the driver has to serve. That is, one or more interrupts (which indicate any
transmit or receive packet to be processed) are queued until the driver
processes them. When queued interrupts are to be served, is determined by the
'IntsPerSec' parameter, which is explained later below.
Possible modes:
-- None - No interrupt moderation is applied on the adapter card.
Therefore, each transmit or receive interrupt is served immediately
as soon as it appears on the interrupt line of the adapter card.
-- Static - Interrupt moderation is applied on the adapter card.
All transmit and receive interrupts are queued until a complete
moderation interval ends. If such a moderation interval ends, all
queued interrupts are processed in one big bunch without any delay.
The term 'static' reflects the fact, that interrupt moderation is
always enabled, regardless how much network load is currently
passing via a particular interface. In addition, the duration of
the moderation interval has a fixed length that never changes while
the driver is operational.
-- Dynamic - Interrupt moderation might be applied on the adapter card,
depending on the load of the system. If the driver detects that the
system load is too high, the driver tries to shield the system against
too much network load by enabling interrupt moderation. If - at a later
time - the CPU utilization decreases again (or if the network load is
negligible) the interrupt moderation will automatically be disabled.
Interrupt moderation should be used when the driver has to handle one or more
interfaces with a high network load, which - as a consequence - leads also to a
high CPU utilization. When moderation is applied in such high network load
situations, CPU load might be reduced by 20-30%.
NOTE: The drawback of using interrupt moderation is an increase of the round-
trip-time (RTT), due to the queueing and serving of interrupts at dedicated
moderation times.
Interrupts per second
---------------------
Parameter: IntsPerSec
Values: 30...40000 (interrupts per second)
Default: 2000
This parameter is only used if either static or dynamic interrupt moderation
is used on a network adapter card. Using this parameter if no moderation is
applied will lead to no action performed.
This parameter determines the length of any interrupt moderation interval.
Assuming that static interrupt moderation is to be used, an 'IntsPerSec'
parameter value of 2000 will lead to an interrupt moderation interval of
500 microseconds.
NOTE: The duration of the moderation interval is to be chosen with care.
At first glance, selecting a very long duration (e.g. only 100 interrupts per
second) seems to be meaningful, but the increase of packet-processing delay
is tremendous. On the other hand, selecting a very short moderation time might
compensate the use of any moderation being applied.
Preferred Port
--------------
Parameter: PrefPort
Values: A, B
Default: A
This is used to force the preferred port to A or B (on dual-port network
adapters). The preferred port is the one that is used if both are detected
as fully functional.
RLMT Mode (Redundant Link Management Technology)
------------------------------------------------
Parameter: RlmtMode
Values: CheckLinkState,CheckLocalPort, CheckSeg, DualNet
Default: CheckLinkState
RLMT monitors the status of the port. If the link of the active port
fails, RLMT switches immediately to the standby link. The virtual link is
maintained as long as at least one 'physical' link is up.
Possible modes:
-- CheckLinkState - Check link state only: RLMT uses the link state
reported by the adapter hardware for each individual port to
determine whether a port can be used for all network traffic or
not.
-- CheckLocalPort - In this mode, RLMT monitors the network path
between the two ports of an adapter by regularly exchanging packets
between them. This mode requires a network configuration in which
the two ports are able to "see" each other (i.e. there must not be
any router between the ports).
-- CheckSeg - Check local port and segmentation: This mode supports the
same functions as the CheckLocalPort mode and additionally checks
network segmentation between the ports. Therefore, this mode is only
to be used if Gigabit Ethernet switches are installed on the network
that have been configured to use the Spanning Tree protocol.
-- DualNet - In this mode, ports A and B are used as separate devices.
If you have a dual port adapter, port A will be configured as eth0
and port B as eth1. Both ports can be used independently with
distinct IP addresses. The preferred port setting is not used.
RLMT is turned off.
NOTE: RLMT modes CLP and CLPSS are designed to operate in configurations
where a network path between the ports on one adapter exists.
Moreover, they are not designed to work where adapters are connected
back-to-back.
***
5 Large Frame Support
======================
The driver supports large frames (also called jumbo frames). Using large
frames can result in an improved throughput if transferring large amounts
of data.
To enable large frames, set the MTU (maximum transfer unit) of the
interface to the desired value (up to 9000), execute the following
command:
ifconfig eth0 mtu 9000
This will only work if you have two adapters connected back-to-back
or if you use a switch that supports large frames. When using a switch,
it should be configured to allow large frames and auto-negotiation should
be set to OFF. The setting must be configured on all adapters that can be
reached by the large frames. If one adapter is not set to receive large
frames, it will simply drop them.
You can switch back to the standard ethernet frame size by executing the
following command:
ifconfig eth0 mtu 1500
To permanently configure this setting, add a script with the 'ifconfig'
line to the system startup sequence (named something like "S99sk98lin"
in /etc/rc.d/rc2.d).
***
6 VLAN and Link Aggregation Support (IEEE 802.1, 802.1q, 802.3ad)
==================================================================
The Marvell Yukon/SysKonnect Linux drivers are able to support VLAN and
Link Aggregation according to IEEE standards 802.1, 802.1q, and 802.3ad.
These features are only available after installation of open source
modules available on the Internet:
For VLAN go to: http://www.candelatech.com/~greear/vlan.html
For Link Aggregation go to: http://www.st.rim.or.jp/~yumo
NOTE: SysKonnect GmbH does not offer any support for these open source
modules and does not take the responsibility for any kind of
failures or problems arising in connection with these modules.
NOTE: Configuring Link Aggregation on a SysKonnect dual link adapter may
cause problems when unloading the driver.
7 Troubleshooting
==================
If any problems occur during the installation process, check the
following list:
Problem: The SK-98xx adapter cannot be found by the driver.
Solution: In /proc/pci search for the following entry:
'Ethernet controller: SysKonnect SK-98xx ...'
If this entry exists, the SK-98xx or SK-98xx V2.0 adapter has
been found by the system and should be operational.
If this entry does not exist or if the file '/proc/pci' is not
found, there may be a hardware problem or the PCI support may
not be enabled in your kernel.
The adapter can be checked using the diagnostics program which
is available on the SysKonnect web site:
www.syskonnect.com
Some COMPAQ machines have problems dealing with PCI under Linux.
This problem is described in the 'PCI howto' document
(included in some distributions or available from the
web, e.g. at 'www.linux.org').
Problem: Programs such as 'ifconfig' or 'route' cannot be found or the
error message 'Operation not permitted' is displayed.
Reason: You are not logged in as user 'root'.
Solution: Logout and login as 'root' or change to 'root' via 'su'.
Problem: Upon use of the command 'ping <address>' the message
"ping: sendto: Network is unreachable" is displayed.
Reason: Your route is not set correctly.
Solution: If you are using RedHat, you probably forgot to set up the
route in the 'network configuration'.
Check the existing routes with the 'route' command and check
if an entry for 'eth0' exists, and if so, if it is set correctly.
Problem: The driver can be started, the adapter is connected to the
network, but you cannot receive or transmit any packets;
e.g. 'ping' does not work.
Reason: There is an incorrect route in your routing table.
Solution: Check the routing table with the command 'route' and read the
manual help pages dealing with routes (enter 'man route').
NOTE: Although the 2.2.x kernel versions generate the routing entry
automatically, problems of this kind may occur here as well. We've
come across a situation in which the driver started correctly at
system start, but after the driver has been removed and reloaded,
the route of the adapter's network pointed to the 'dummy0'device
and had to be corrected manually.
Problem: Your computer should act as a router between multiple
IP subnetworks (using multiple adapters), but computers in
other subnetworks cannot be reached.
Reason: Either the router's kernel is not configured for IP forwarding
or the routing table and gateway configuration of at least one
computer is not working.
Problem: Upon driver start, the following error message is displayed:
"eth0: -- ERROR --
Class: internal Software error
Nr: 0xcc
Msg: SkGeInitPort() cannot init running ports"
Reason: You are using a driver compiled for single processor machines
on a multiprocessor machine with SMP (Symmetric MultiProcessor)
kernel.
Solution: Configure your kernel appropriately and recompile the kernel or
the modules.
If your problem is not listed here, please contact SysKonnect's technical
support for help (linux@syskonnect.de).
When contacting our technical support, please ensure that the following
information is available:
- System Manufacturer and HW Informations (CPU, Memory... )
- PCI-Boards in your system
- Distribution
- Kernel version
- Driver version
***
***End of Readme File***

8
Documentation/networking/tcp.txt
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@ -1,7 +1,7 @@
TCP protocol
============
Last updated: 21 June 2005
Last updated: 9 February 2008
Contents
========
@ -52,9 +52,9 @@ research and RFC's before developing new modules.
The method that is used to determine which congestion control mechanism is
determined by the setting of the sysctl net.ipv4.tcp_congestion_control.
The default congestion control will be the last one registered (LIFO);
so if you built everything as modules. the default will be reno. If you
build with the default's from Kconfig, then BIC will be builtin (not a module)
and it will end up the default.
so if you built everything as modules, the default will be reno. If you
build with the defaults from Kconfig, then CUBIC will be builtin (not a
module) and it will end up the default.
If you really want a particular default value then you will need
to set it with the sysctl. If you use a sysctl, the module will be autoloaded

621
Documentation/networking/wan-router.txt
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@ -1,621 +0,0 @@
------------------------------------------------------------------------------
Linux WAN Router Utilities Package
------------------------------------------------------------------------------
Version 2.2.1
Mar 28, 2001
Author: Nenad Corbic <ncorbic@sangoma.com>
Copyright (c) 1995-2001 Sangoma Technologies Inc.
------------------------------------------------------------------------------
INTRODUCTION
Wide Area Networks (WANs) are used to interconnect Local Area Networks (LANs)
and/or stand-alone hosts over vast distances with data transfer rates
significantly higher than those achievable with commonly used dial-up
connections.
Usually an external device called `WAN router' sitting on your local network
or connected to your machine's serial port provides physical connection to
WAN. Although router's job may be as simple as taking your local network
traffic, converting it to WAN format and piping it through the WAN link, these
devices are notoriously expensive, with prices as much as 2 - 5 times higher
then the price of a typical PC box.
Alternatively, considering robustness and multitasking capabilities of Linux,
an internal router can be built (most routers use some sort of stripped down
Unix-like operating system anyway). With a number of relatively inexpensive WAN
interface cards available on the market, a perfectly usable router can be
built for less than half a price of an external router. Yet a Linux box
acting as a router can still be used for other purposes, such as fire-walling,
running FTP, WWW or DNS server, etc.
This kernel module introduces the notion of a WAN Link Driver (WLD) to Linux
operating system and provides generic hardware-independent services for such
drivers. Why can existing Linux network device interface not be used for
this purpose? Well, it can. However, there are a few key differences between
a typical network interface (e.g. Ethernet) and a WAN link.
Many WAN protocols, such as X.25 and frame relay, allow for multiple logical
connections (known as `virtual circuits' in X.25 terminology) over a single
physical link. Each such virtual circuit may (and almost always does) lead
to a different geographical location and, therefore, different network. As a
result, it is the virtual circuit, not the physical link, that represents a
route and, therefore, a network interface in Linux terms.
To further complicate things, virtual circuits are usually volatile in nature
(excluding so called `permanent' virtual circuits or PVCs). With almost no
time required to set up and tear down a virtual circuit, it is highly desirable
to implement on-demand connections in order to minimize network charges. So
unlike a typical network driver, the WAN driver must be able to handle multiple
network interfaces and cope as multiple virtual circuits come into existence
and go away dynamically.
Last, but not least, WAN configuration is much more complex than that of say
Ethernet and may well amount to several dozens of parameters. Some of them
are "link-wide" while others are virtual circuit-specific. The same holds
true for WAN statistics which is by far more extensive and extremely useful
when troubleshooting WAN connections. Extending the ifconfig utility to suit
these needs may be possible, but does not seem quite reasonable. Therefore, a
WAN configuration utility and corresponding application programmer's interface
is needed for this purpose.
Most of these problems are taken care of by this module. Its goal is to
provide a user with more-or-less standard look and feel for all WAN devices and
assist a WAN device driver writer by providing common services, such as:
o User-level interface via /proc file system
o Centralized configuration
o Device management (setup, shutdown, etc.)
o Network interface management (dynamic creation/destruction)
o Protocol encapsulation/decapsulation
To ba able to use the Linux WAN Router you will also need a WAN Tools package
available from
ftp.sangoma.com/pub/linux/current_wanpipe/wanpipe-X.Y.Z.tgz
where vX.Y.Z represent the wanpipe version number.
For technical questions and/or comments please e-mail to ncorbic@sangoma.com.
For general inquiries please contact Sangoma Technologies Inc. by
Hotline: 1-800-388-2475 (USA and Canada, toll free)
Phone: (905) 474-1990 ext: 106
Fax: (905) 474-9223
E-mail: dm@sangoma.com (David Mandelstam)
WWW: http://www.sangoma.com
INSTALLATION
Please read the WanpipeForLinux.pdf manual on how to
install the WANPIPE tools and drivers properly.
After installing wanpipe package: /usr/local/wanrouter/doc.
On the ftp.sangoma.com : /linux/current_wanpipe/doc
COPYRIGHT AND LICENSING INFORMATION
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 675 Mass
Ave, Cambridge, MA 02139, USA.
ACKNOWLEDGEMENTS
This product is based on the WANPIPE(tm) Multiprotocol WAN Router developed
by Sangoma Technologies Inc. for Linux 2.0.x and 2.2.x. Success of the WANPIPE
together with the next major release of Linux kernel in summer 1996 commanded
adequate changes to the WANPIPE code to take full advantage of new Linux
features.
Instead of continuing developing proprietary interface tied to Sangoma WAN
cards, we decided to separate all hardware-independent code into a separate
module and defined two levels of interfaces - one for user-level applications
and another for kernel-level WAN drivers. WANPIPE is now implemented as a
WAN driver compliant with the WAN Link Driver interface. Also a general
purpose WAN configuration utility and a set of shell scripts was developed to
support WAN router at the user level.
Many useful ideas concerning hardware-independent interface implementation
were given by Mike McLagan <mike.mclagan@linux.org> and his implementation
of the Frame Relay router and drivers for Sangoma cards (dlci/sdla).
With the new implementation of the APIs being incorporated into the WANPIPE,
a special thank goes to Alan Cox in providing insight into BSD sockets.
Special thanks to all the WANPIPE users who performed field-testing, reported
bugs and made valuable comments and suggestions that help us to improve this
product.
NEW IN THIS RELEASE
o Updated the WANCFG utility
Calls the pppconfig to configure the PPPD
for async connections.
o Added the PPPCONFIG utility
Used to configure the PPPD daemon for the
WANPIPE Async PPP and standard serial port.
The wancfg calls the pppconfig to configure
the pppd.
o Fixed the PCI autodetect feature.
The SLOT 0 was used as an autodetect option
however, some high end PC's slot numbers start
from 0.
o This release has been tested with the new backupd
daemon release.
PRODUCT COMPONENTS AND RELATED FILES
/etc: (or user defined)
wanpipe1.conf default router configuration file
/lib/modules/X.Y.Z/misc:
wanrouter.o router kernel loadable module
af_wanpipe.o wanpipe api socket module
/lib/modules/X.Y.Z/net:
sdladrv.o Sangoma SDLA support module
wanpipe.o Sangoma WANPIPE(tm) driver module
/proc/net/wanrouter
Config reads current router configuration
Status reads current router status
{name} reads WAN driver statistics
/usr/sbin:
wanrouter wanrouter start-up script
wanconfig wanrouter configuration utility
sdladump WANPIPE adapter memory dump utility
fpipemon Monitor for Frame Relay
cpipemon Monitor for Cisco HDLC
ppipemon Monitor for PPP
xpipemon Monitor for X25
wpkbdmon WANPIPE keyboard led monitor/debugger
/usr/local/wanrouter:
README this file
COPYING GNU General Public License
Setup installation script
Filelist distribution definition file
wanrouter.rc meta-configuration file
(used by the Setup and wanrouter script)
/usr/local/wanrouter/doc:
wanpipeForLinux.pdf WAN Router User's Manual
/usr/local/wanrouter/patches:
wanrouter-v2213.gz patch for Linux kernels 2.2.11 up to 2.2.13.
wanrouter-v2214.gz patch for Linux kernel 2.2.14.
wanrouter-v2215.gz patch for Linux kernels 2.2.15 to 2.2.17.
wanrouter-v2218.gz patch for Linux kernels 2.2.18 and up.
wanrouter-v240.gz patch for Linux kernel 2.4.0.
wanrouter-v242.gz patch for Linux kernel 2.4.2 and up.
wanrouter-v2034.gz patch for Linux kernel 2.0.34
wanrouter-v2036.gz patch for Linux kernel 2.0.36 and up.
/usr/local/wanrouter/patches/kdrivers:
Sources of the latest WANPIPE device drivers.
These are used to UPGRADE the linux kernel to the newest
version if the kernel source has already been patched with
WANPIPE drivers.
/usr/local/wanrouter/samples:
interface sample interface configuration file
wanpipe1.cpri CHDLC primary port
wanpipe2.csec CHDLC secondary port
wanpipe1.fr Frame Relay protocol
wanpipe1.ppp PPP protocol )
wanpipe1.asy CHDLC ASYNC protocol
wanpipe1.x25 X25 protocol
wanpipe1.stty Sync TTY driver (Used by Kernel PPPD daemon)
wanpipe1.atty Async TTY driver (Used by Kernel PPPD daemon)
wanrouter.rc sample meta-configuration file
/usr/local/wanrouter/util:
* wan-tools utilities source code
/usr/local/wanrouter/api/x25:
* x25 api sample programs.
/usr/local/wanrouter/api/chdlc:
* chdlc api sample programs.
/usr/local/wanrouter/api/fr:
* fr api sample programs.
/usr/local/wanrouter/config/wancfg:
wancfg WANPIPE GUI configuration program.
Creates wanpipe#.conf files.
/usr/local/wanrouter/config/cfgft1:
cfgft1 GUI CSU/DSU configuration program.
/usr/include/linux:
wanrouter.h router API definitions
wanpipe.h WANPIPE API definitions
sdladrv.h SDLA support module API definitions
sdlasfm.h SDLA firmware module definitions
if_wanpipe.h WANPIPE Socket definitions
sdlapci.h WANPIPE PCI definitions
/usr/src/linux/net/wanrouter:
* wanrouter source code
/var/log:
wanrouter wanrouter start-up log (created by the Setup script)
/var/lock: (or /var/lock/subsys for RedHat)
wanrouter wanrouter lock file (created by the Setup script)
/usr/local/wanrouter/firmware:
fr514.sfm Frame relay firmware for Sangoma S508/S514 card
cdual514.sfm Dual Port Cisco HDLC firmware for Sangoma S508/S514 card
ppp514.sfm PPP Firmware for Sangoma S508 and S514 cards
x25_508.sfm X25 Firmware for Sangoma S508 card.
REVISION HISTORY
1.0.0 December 31, 1996 Initial version
1.0.1 January 30, 1997 Status and statistics can be read via /proc
filesystem entries.
1.0.2 April 30, 1997 Added UDP management via monitors.
1.0.3 June 3, 1997 UDP management for multiple boards using Frame
Relay and PPP
Enabled continuous transmission of Configure
Request Packet for PPP (for 508 only)
Connection Timeout for PPP changed from 900 to 0
Flow Control Problem fixed for Frame Relay
1.0.4 July 10, 1997 S508/FT1 monitoring capability in fpipemon and
ppipemon utilities.
Configurable TTL for UDP packets.
Multicast and Broadcast IP source addresses are
silently discarded.
1.0.5 July 28, 1997 Configurable T391,T392,N391,N392,N393 for Frame
Relay in router.conf.
Configurable Memory Address through router.conf
for Frame Relay, PPP and X.25. (commenting this
out enables auto-detection).
Fixed freeing up received buffers using kfree()
for Frame Relay and X.25.
Protect sdla_peek() by calling save_flags(),
cli() and restore_flags().
Changed number of Trace elements from 32 to 20
Added DLCI specific data monitoring in FPIPEMON.
2.0.0 Nov 07, 1997 Implemented protection of RACE conditions by
critical flags for FRAME RELAY and PPP.
DLCI List interrupt mode implemented.
IPX support in FRAME RELAY and PPP.
IPX Server Support (MARS)
More driver specific stats included in FPIPEMON
and PIPEMON.
2.0.1 Nov 28, 1997 Bug Fixes for version 2.0.0.
Protection of "enable_irq()" while
"disable_irq()" has been enabled from any other
routine (for Frame Relay, PPP and X25).
Added additional Stats for Fpipemon and Ppipemon
Improved Load Sharing for multiple boards
2.0.2 Dec 09, 1997 Support for PAP and CHAP for ppp has been
implemented.
2.0.3 Aug 15, 1998 New release supporting Cisco HDLC, CIR for Frame
relay, Dynamic IP assignment for PPP and Inverse
Arp support for Frame-relay. Man Pages are
included for better support and a new utility
for configuring FT1 cards.
2.0.4 Dec 09, 1998 Dual Port support for Cisco HDLC.
Support for HDLC (LAPB) API.
Supports BiSync Streaming code for S502E
and S503 cards.
Support for Streaming HDLC API.
Provides a BSD socket interface for
creating applications using BiSync
streaming.
2.0.5 Aug 04, 1999 CHDLC initialization bug fix.
PPP interrupt driven driver:
Fix to the PPP line hangup problem.
New PPP firmware
Added comments to the startup SYSTEM ERROR messages
Xpipemon debugging application for the X25 protocol
New USER_MANUAL.txt
Fixed the odd boundary 4byte writes to the board.
BiSync Streaming code has been taken out.
Available as a patch.
Streaming HDLC API has been taken out.
Available as a patch.
2.0.6 Aug 17, 1999 Increased debugging in statup scripts
Fixed installation bugs from 2.0.5
Kernel patch works for both 2.2.10 and 2.2.11 kernels.
There is no functional difference between the two packages
2.0.7 Aug 26, 1999 o Merged X25API code into WANPIPE.
o Fixed a memory leak for X25API
o Updated the X25API code for 2.2.X kernels.
o Improved NEM handling.
2.1.0 Oct 25, 1999 o New code for S514 PCI Card
o New CHDLC and Frame Relay drivers
o PPP and X25 are not supported in this release
2.1.1 Nov 30, 1999 o PPP support for S514 PCI Cards
2.1.3 Apr 06, 2000 o Socket based x25api
o Socket based chdlc api
o Socket based fr api
o Dual Port Receive only CHDLC support.
o Asynchronous CHDLC support (Secondary Port)
o cfgft1 GUI csu/dsu configurator
o wancfg GUI configuration file
configurator.
o Architectural directory changes.
beta-2.1.4 Jul 2000 o Dynamic interface configuration:
Network interfaces reflect the state
of protocol layer. If the protocol becomes
disconnected, driver will bring down
the interface. Once the protocol reconnects
the interface will be brought up.
Note: This option is turned off by default.
o Dynamic wanrouter setup using 'wanconfig':
wanconfig utility can be used to
shutdown,restart,start or reconfigure
a virtual circuit dynamically.
Frame Relay: Each DLCI can be:
created,stopped,restarted and reconfigured
dynamically using wanconfig.
ex: wanconfig card wanpipe1 dev wp1_fr16 up
o Wanrouter startup via command line arguments:
wanconfig also supports wanrouter startup via command line
arguments. Thus, there is no need to create a wanpipe#.conf
configuration file.
o Socket based x25api update/bug fixes.
Added support for LCN numbers greater than 255.
Option to pass up modem messages.
Provided a PCI IRQ check, so a single S514
card is guaranteed to have a non-sharing interrupt.
o Fixes to the wancfg utility.
o New FT1 debugging support via *pipemon utilities.
o Frame Relay ARP support Enabled.
beta3-2.1.4 Jul 2000 o X25 M_BIT Problem fix.
o Added the Multi-Port PPP
Updated utilities for the Multi-Port PPP.
2.1.4 Aut 2000
o In X25API:
Maximum packet an application can send
to the driver has been extended to 4096 bytes.
Fixed the x25 startup bug. Enable
communications only after all interfaces
come up. HIGH SVC/PVC is used to calculate
the number of channels.
Enable protocol only after all interfaces
are enabled.
o Added an extra state to the FT1 config, kernel module.
o Updated the pipemon debuggers.
o Blocked the Multi-Port PPP from running on kernels
2.2.16 or greater, due to syncppp kernel module
change.
beta1-2.1.5 Nov 15 2000
o Fixed the MultiPort PPP Support for kernels 2.2.16 and above.
2.2.X kernels only
o Secured the driver UDP debugging calls
- All illegal network debugging calls are reported to
the log.
- Defined a set of allowed commands, all other denied.
o Cpipemon
- Added set FT1 commands to the cpipemon. Thus CSU/DSU
configuration can be performed using cpipemon.
All systems that cannot run cfgft1 GUI utility should
use cpipemon to configure the on board CSU/DSU.
o Keyboard Led Monitor/Debugger
- A new utility /usr/sbin/wpkbdmon uses keyboard leds
to convey operational statistic information of the
Sangoma WANPIPE cards.
NUM_LOCK = Line State (On=connected, Off=disconnected)
CAPS_LOCK = Tx data (On=transmitting, Off=no tx data)
SCROLL_LOCK = Rx data (On=receiving, Off=no rx data
o Hardware probe on module load and dynamic device allocation
- During WANPIPE module load, all Sangoma cards are probed
and found information is printed in the /var/log/messages.
- If no cards are found, the module load fails.
- Appropriate number of devices are dynamically loaded
based on the number of Sangoma cards found.
Note: The kernel configuration option
CONFIG_WANPIPE_CARDS has been taken out.
o Fixed the Frame Relay and Chdlc network interfaces so they are
compatible with libpcap libraries. Meaning, tcpdump, snort,
ethereal, and all other packet sniffers and debuggers work on
all WANPIPE network interfaces.
- Set the network interface encoding type to ARPHRD_PPP.
This tell the sniffers that data obtained from the
network interface is in pure IP format.
Fix for 2.2.X kernels only.
o True interface encoding option for Frame Relay and CHDLC
- The above fix sets the network interface encoding
type to ARPHRD_PPP, however some customers use
the encoding interface type to determine the
protocol running. Therefore, the TURE ENCODING
option will set the interface type back to the
original value.
NOTE: If this option is used with Frame Relay and CHDLC
libpcap library support will be broken.
i.e. tcpdump will not work.
Fix for 2.2.x Kernels only.
o Ethernet Bridgind over Frame Relay
- The Frame Relay bridging has been developed by
Kristian Hoffmann and Mark Wells.
- The Linux kernel bridge is used to send ethernet
data over the frame relay links.
For 2.2.X Kernels only.
o Added extensive 2.0.X support. Most new features of
2.1.5 for protocols Frame Relay, PPP and CHDLC are
supported under 2.0.X kernels.
beta1-2.2.0 Dec 30 2000
o Updated drivers for 2.4.X kernels.
o Updated drivers for SMP support.
o X25API is now able to share PCI interrupts.
o Took out a general polling routine that was used
only by X25API.
o Added appropriate locks to the dynamic reconfiguration
code.
o Fixed a bug in the keyboard debug monitor.
beta2-2.2.0 Jan 8 2001
o Patches for 2.4.0 kernel
o Patches for 2.2.18 kernel
o Minor updates to PPP and CHLDC drivers.
Note: No functional difference.
beta3-2.2.9 Jan 10 2001
o I missed the 2.2.18 kernel patches in beta2-2.2.0
release. They are included in this release.
Stable Release
2.2.0 Feb 01 2001
o Bug fix in wancfg GUI configurator.
The edit function didn't work properly.
bata1-2.2.1 Feb 09 2001
o WANPIPE TTY Driver emulation.
Two modes of operation Sync and Async.
Sync: Using the PPPD daemon, kernel SyncPPP layer
and the Wanpipe sync TTY driver: a PPP protocol
connection can be established via Sangoma adapter, over
a T1 leased line.
The 2.4.0 kernel PPP layer supports MULTILINK
protocol, that can be used to bundle any number of Sangoma
adapters (T1 lines) into one, under a single IP address.
Thus, efficiently obtaining multiple T1 throughput.
NOTE: The remote side must also implement MULTILINK PPP
protocol.
Async:Using the PPPD daemon, kernel AsyncPPP layer
and the WANPIPE async TTY driver: a PPP protocol
connection can be established via Sangoma adapter and
a modem, over a telephone line.
Thus, the WANPIPE async TTY driver simulates a serial
TTY driver that would normally be used to interface the
MODEM to the linux kernel.
o WANPIPE PPP Backup Utility
This utility will monitor the state of the PPP T1 line.
In case of failure, a dial up connection will be established
via pppd daemon, ether via a serial tty driver (serial port),
or a WANPIPE async TTY driver (in case serial port is unavailable).
Furthermore, while in dial up mode, the primary PPP T1 link
will be monitored for signs of life.
If the PPP T1 link comes back to life, the dial up connection
will be shutdown and T1 line re-established.
o New Setup installation script.
Option to UPGRADE device drivers if the kernel source has
already been patched with WANPIPE.
Option to COMPILE WANPIPE modules against the currently
running kernel, thus no need for manual kernel and module
re-compilation.
o Updates and Bug Fixes to wancfg utility.
bata2-2.2.1 Feb 20 2001
o Bug fixes to the CHDLC device drivers.
The driver had compilation problems under kernels
2.2.14 or lower.
o Bug fixes to the Setup installation script.
The device drivers compilation options didn't work
properly.
o Update to the wpbackupd daemon.
Optimized the cross-over times, between the primary
link and the backup dialup.
beta3-2.2.1 Mar 02 2001
o Patches for 2.4.2 kernel.
o Bug fixes to util/ make files.
o Bug fixes to the Setup installation script.
o Took out the backupd support and made it into
as separate package.
beta4-2.2.1 Mar 12 2001
o Fix to the Frame Relay Device driver.
IPSAC sends a packet of zero length
header to the frame relay driver. The
driver tries to push its own 2 byte header
into the packet, which causes the driver to
crash.
o Fix the WANPIPE re-configuration code.
Bug was found by trying to run the cfgft1 while the
interface was already running.
o Updates to cfgft1.
Writes a wanpipe#.cfgft1 configuration file
once the CSU/DSU is configured. This file can
holds the current CSU/DSU configuration.
>>>>>> END OF README <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

3
Documentation/nmi_watchdog.txt
Просмотреть файл

@ -23,8 +23,7 @@ kernel debugging options, such as Kernel Stack Meter or Kernel Tracer,
may implicitly disable the NMI watchdog.]
For x86-64, the needed APIC is always compiled in, and the NMI watchdog is
always enabled with I/O-APIC mode (nmi_watchdog=1). Currently, local APIC
mode (nmi_watchdog=2) does not work on x86-64.
always enabled with I/O-APIC mode (nmi_watchdog=1).
Using local APIC (nmi_watchdog=2) needs the first performance register, so
you can't use it for other purposes (such as high precision performance

6
Documentation/power/00-INDEX
Просмотреть файл

@ -14,6 +14,12 @@ notifiers.txt
- Registering suspend notifiers in device drivers
pci.txt
- How the PCI Subsystem Does Power Management
pm.txt
- info on Linux power management support.
pm_qos_interface.txt
- info on Linux PM Quality of Service interface
power_supply_class.txt
- Tells userspace about battery, UPS, AC or DC power supply properties
s2ram.txt
- How to get suspend to ram working (and debug it when it isn't)
states.txt

18
Documentation/power/devices.txt
Просмотреть файл

@ -196,6 +196,11 @@ its parent; and can't be removed or suspended after that parent.
The policy is that the device tree should match hardware bus topology.
(Or at least the control bus, for devices which use multiple busses.)
In particular, this means that a device registration may fail if the parent of
the device is suspending (ie. has been chosen by the PM core as the next
device to suspend) or has already suspended, as well as after all of the other
devices have been suspended. Device drivers must be prepared to cope with such
situations.
Suspending Devices
@ -310,9 +315,12 @@ used with suspend-to-disk:
PM_EVENT_SUSPEND -- quiesce the driver and put hardware into a low-power
state. When used with system sleep states like "suspend-to-RAM" or
"standby", the upcoming resume() call will often be able to rely on
state kept in hardware, or issue system wakeup events. When used
instead with suspend-to-disk, few devices support this capability;
most are completely powered off.
state kept in hardware, or issue system wakeup events.
PM_EVENT_HIBERNATE -- Put hardware into a low-power state and enable wakeup
events as appropriate. It is only used with hibernation
(suspend-to-disk) and few devices are able to wake up the system from
this state; most are completely powered off.
PM_EVENT_FREEZE -- quiesce the driver, but don't necessarily change into
any low power mode. A system snapshot is about to be taken, often
@ -329,8 +337,8 @@ used with suspend-to-disk:
wakeup events nor DMA are allowed.
To enter "standby" (ACPI S1) or "Suspend to RAM" (STR, ACPI S3) states, or
the similarly named APM states, only PM_EVENT_SUSPEND is used; for "Suspend
to Disk" (STD, hibernate, ACPI S4), all of those event codes are used.
the similarly named APM states, only PM_EVENT_SUSPEND is used; the other event
codes are used for hibernation ("Suspend to Disk", STD, ACPI S4).
There's also PM_EVENT_ON, a value which never appears as a suspend event
but is sometimes used to record the "not suspended" device state.

0
Documentation/pm.txt → Documentation/power/pm.txt
Просмотреть файл

0
Documentation/pm_qos_interface.txt → Documentation/power/pm_qos_interface.txt
Просмотреть файл

0
Documentation/power_supply_class.txt → Documentation/power/power_supply_class.txt
Просмотреть файл

622
Documentation/powerpc/booting-without-of.txt
Просмотреть файл

@ -59,12 +59,39 @@ Table of Contents
p) Freescale Synchronous Serial Interface
q) USB EHCI controllers
VII - Specifying interrupt information for devices
VII - Marvell Discovery mv64[345]6x System Controller chips
1) The /system-controller node
2) Child nodes of /system-controller
a) Marvell Discovery MDIO bus
b) Marvell Discovery ethernet controller
c) Marvell Discovery PHY nodes
d) Marvell Discovery SDMA nodes
e) Marvell Discovery BRG nodes
f) Marvell Discovery CUNIT nodes
g) Marvell Discovery MPSCROUTING nodes
h) Marvell Discovery MPSCINTR nodes
i) Marvell Discovery MPSC nodes
j) Marvell Discovery Watch Dog Timer nodes
k) Marvell Discovery I2C nodes
l) Marvell Discovery PIC (Programmable Interrupt Controller) nodes
m) Marvell Discovery MPP (Multipurpose Pins) multiplexing nodes
n) Marvell Discovery GPP (General Purpose Pins) nodes
o) Marvell Discovery PCI host bridge node
p) Marvell Discovery CPU Error nodes
q) Marvell Discovery SRAM Controller nodes
r) Marvell Discovery PCI Error Handler nodes
s) Marvell Discovery Memory Controller nodes
VIII - Specifying interrupt information for devices
1) interrupts property
2) interrupt-parent property
3) OpenPIC Interrupt Controllers
4) ISA Interrupt Controllers
VIII - Specifying GPIO information for devices
1) gpios property
2) gpio-controller nodes
Appendix A - Sample SOC node for MPC8540
@ -1269,10 +1296,6 @@ platforms are moved over to use the flattened-device-tree model.
Recommended properties:
- linux,network-index : This is the intended "index" of this
network device. This is used by the bootwrapper to interpret
MAC addresses passed by the firmware when no information other
than indices is available to associate an address with a device.
- phy-connection-type : a string naming the controller/PHY interface type,
i.e., "mii" (default), "rmii", "gmii", "rgmii", "rgmii-id", "sgmii",
"tbi", or "rtbi". This property is only really needed if the connection
@ -1622,8 +1645,7 @@ platforms are moved over to use the flattened-device-tree model.
- device_type : should be "network", "hldc", "uart", "transparent"
"bisync", "atm", or "serial".
- compatible : could be "ucc_geth" or "fsl_atm" and so on.
- model : should be "UCC".
- device-id : the ucc number(1-8), corresponding to UCCx in UM.
- cell-index : the ucc number(1-8), corresponding to UCCx in UM.
- reg : Offset and length of the register set for the device
- interrupts : <a b> where a is the interrupt number and b is a
field that represents an encoding of the sense and level
@ -1667,10 +1689,6 @@ platforms are moved over to use the flattened-device-tree model.
- phy-handle : The phandle for the PHY connected to this controller.
Recommended properties:
- linux,network-index : This is the intended "index" of this
network device. This is used by the bootwrapper to interpret
MAC addresses passed by the firmware when no information other
than indices is available to associate an address with a device.
- phy-connection-type : a string naming the controller/PHY interface type,
i.e., "mii" (default), "rmii", "gmii", "rgmii", "rgmii-id" (Internal
Delay), "rgmii-txid" (delay on TX only), "rgmii-rxid" (delay on RX only),
@ -1680,8 +1698,7 @@ platforms are moved over to use the flattened-device-tree model.
ucc@2000 {
device_type = "network";
compatible = "ucc_geth";
model = "UCC";
device-id = <1>;
cell-index = <1>;
reg = <2000 200>;
interrupts = <a0 0>;
interrupt-parent = <700>;
@ -1995,7 +2012,6 @@ platforms are moved over to use the flattened-device-tree model.
interrupts = <20 8>;
interrupt-parent = <&PIC>;
phy-handle = <&PHY0>;
linux,network-index = <0>;
fsl,cpm-command = <12000300>;
};
@ -2217,12 +2233,6 @@ platforms are moved over to use the flattened-device-tree model.
EMAC, that is the content of the current (bogus) "phy-port"
property.
Recommended properties:
- linux,network-index : This is the intended "index" of this
network device. This is used by the bootwrapper to interpret
MAC addresses passed by the firmware when no information other
than indices is available to associate an address with a device.
Optional properties:
- phy-address : 1 cell, optional, MDIO address of the PHY. If absent,
a search is performed.
@ -2246,7 +2256,6 @@ platforms are moved over to use the flattened-device-tree model.
Example:
EMAC0: ethernet@40000800 {
linux,network-index = <0>;
device_type = "network";
compatible = "ibm,emac-440gp", "ibm,emac";
interrupt-parent = <&UIC1>;
@ -2817,9 +2826,528 @@ platforms are moved over to use the flattened-device-tree model.
};
More devices will be defined as this spec matures.
VII - Marvell Discovery mv64[345]6x System Controller chips
===========================================================
VII - Specifying interrupt information for devices
The Marvell mv64[345]60 series of system controller chips contain
many of the peripherals needed to implement a complete computer
system. In this section, we define device tree nodes to describe
the system controller chip itself and each of the peripherals
which it contains. Compatible string values for each node are
prefixed with the string "marvell,", for Marvell Technology Group Ltd.
1) The /system-controller node
This node is used to represent the system-controller and must be
present when the system uses a system contller chip. The top-level
system-controller node contains information that is global to all
devices within the system controller chip. The node name begins
with "system-controller" followed by the unit address, which is
the base address of the memory-mapped register set for the system
controller chip.
Required properties:
- ranges : Describes the translation of system controller addresses
for memory mapped registers.
- clock-frequency: Contains the main clock frequency for the system
controller chip.
- reg : This property defines the address and size of the
memory-mapped registers contained within the system controller
chip. The address specified in the "reg" property should match
the unit address of the system-controller node.
- #address-cells : Address representation for system controller
devices. This field represents the number of cells needed to
represent the address of the memory-mapped registers of devices
within the system controller chip.
- #size-cells : Size representation for for the memory-mapped
registers within the system controller chip.
- #interrupt-cells : Defines the width of cells used to represent
interrupts.
Optional properties:
- model : The specific model of the system controller chip. Such
as, "mv64360", "mv64460", or "mv64560".
- compatible : A string identifying the compatibility identifiers
of the system controller chip.
The system-controller node contains child nodes for each system
controller device that the platform uses. Nodes should not be created
for devices which exist on the system controller chip but are not used
Example Marvell Discovery mv64360 system-controller node:
system-controller@f1000000 { /* Marvell Discovery mv64360 */
#address-cells = <1>;
#size-cells = <1>;
model = "mv64360"; /* Default */
compatible = "marvell,mv64360";
clock-frequency = <133333333>;
reg = <0xf1000000 0x10000>;
virtual-reg = <0xf1000000>;
ranges = <0x88000000 0x88000000 0x1000000 /* PCI 0 I/O Space */
0x80000000 0x80000000 0x8000000 /* PCI 0 MEM Space */
0xa0000000 0xa0000000 0x4000000 /* User FLASH */
0x00000000 0xf1000000 0x0010000 /* Bridge's regs */
0xf2000000 0xf2000000 0x0040000>;/* Integrated SRAM */
[ child node definitions... ]
}
2) Child nodes of /system-controller
a) Marvell Discovery MDIO bus
The MDIO is a bus to which the PHY devices are connected. For each
device that exists on this bus, a child node should be created. See
the definition of the PHY node below for an example of how to define
a PHY.
Required properties:
- #address-cells : Should be <1>
- #size-cells : Should be <0>
- device_type : Should be "mdio"
- compatible : Should be "marvell,mv64360-mdio"
Example:
mdio {
#address-cells = <1>;
#size-cells = <0>;
device_type = "mdio";
compatible = "marvell,mv64360-mdio";
ethernet-phy@0 {
......
};
};
b) Marvell Discovery ethernet controller
The Discover ethernet controller is described with two levels
of nodes. The first level describes an ethernet silicon block
and the second level describes up to 3 ethernet nodes within
that block. The reason for the multiple levels is that the
registers for the node are interleaved within a single set
of registers. The "ethernet-block" level describes the
shared register set, and the "ethernet" nodes describe ethernet
port-specific properties.
Ethernet block node
Required properties:
- #address-cells : <1>
- #size-cells : <0>
- compatible : "marvell,mv64360-eth-block"
- reg : Offset and length of the register set for this block
Example Discovery Ethernet block node:
ethernet-block@2000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "marvell,mv64360-eth-block";
reg = <0x2000 0x2000>;
ethernet@0 {
.......
};
};
Ethernet port node
Required properties:
- device_type : Should be "network".
- compatible : Should be "marvell,mv64360-eth".
- reg : Should be <0>, <1>, or <2>, according to which registers
within the silicon block the device uses.
- interrupts : <a> where a is the interrupt number for the port.
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
- phy : the phandle for the PHY connected to this ethernet
controller.
- local-mac-address : 6 bytes, MAC address
Example Discovery Ethernet port node:
ethernet@0 {
device_type = "network";
compatible = "marvell,mv64360-eth";
reg = <0>;
interrupts = <32>;
interrupt-parent = <&PIC>;
phy = <&PHY0>;
local-mac-address = [ 00 00 00 00 00 00 ];
};
c) Marvell Discovery PHY nodes
Required properties:
- device_type : Should be "ethernet-phy"
- interrupts : <a> where a is the interrupt number for this phy.
- interrupt-parent : the phandle for the interrupt controller that
services interrupts for this device.
- reg : The ID number for the phy, usually a small integer
Example Discovery PHY node:
ethernet-phy@1 {
device_type = "ethernet-phy";
compatible = "broadcom,bcm5421";
interrupts = <76>; /* GPP 12 */
interrupt-parent = <&PIC>;
reg = <1>;
};
d) Marvell Discovery SDMA nodes
Represent DMA hardware associated with the MPSC (multiprotocol
serial controllers).
Required properties:
- compatible : "marvell,mv64360-sdma"
- reg : Offset and length of the register set for this device
- interrupts : <a> where a is the interrupt number for the DMA
device.
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
Example Discovery SDMA node:
sdma@4000 {
compatible = "marvell,mv64360-sdma";
reg = <0x4000 0xc18>;
virtual-reg = <0xf1004000>;
interrupts = <36>;
interrupt-parent = <&PIC>;
};
e) Marvell Discovery BRG nodes
Represent baud rate generator hardware associated with the MPSC
(multiprotocol serial controllers).
Required properties:
- compatible : "marvell,mv64360-brg"
- reg : Offset and length of the register set for this device
- clock-src : A value from 0 to 15 which selects the clock
source for the baud rate generator. This value corresponds
to the CLKS value in the BRGx configuration register. See
the mv64x60 User's Manual.
- clock-frequence : The frequency (in Hz) of the baud rate
generator's input clock.
- current-speed : The current speed setting (presumably by
firmware) of the baud rate generator.
Example Discovery BRG node:
brg@b200 {
compatible = "marvell,mv64360-brg";
reg = <0xb200 0x8>;
clock-src = <8>;
clock-frequency = <133333333>;
current-speed = <9600>;
};
f) Marvell Discovery CUNIT nodes
Represent the Serial Communications Unit device hardware.
Required properties:
- reg : Offset and length of the register set for this device
Example Discovery CUNIT node:
cunit@f200 {
reg = <0xf200 0x200>;
};
g) Marvell Discovery MPSCROUTING nodes
Represent the Discovery's MPSC routing hardware
Required properties:
- reg : Offset and length of the register set for this device
Example Discovery CUNIT node:
mpscrouting@b500 {
reg = <0xb400 0xc>;
};
h) Marvell Discovery MPSCINTR nodes
Represent the Discovery's MPSC DMA interrupt hardware registers
(SDMA cause and mask registers).
Required properties:
- reg : Offset and length of the register set for this device
Example Discovery MPSCINTR node:
mpsintr@b800 {
reg = <0xb800 0x100>;
};
i) Marvell Discovery MPSC nodes
Represent the Discovery's MPSC (Multiprotocol Serial Controller)
serial port.
Required properties:
- device_type : "serial"
- compatible : "marvell,mv64360-mpsc"
- reg : Offset and length of the register set for this device
- sdma : the phandle for the SDMA node used by this port
- brg : the phandle for the BRG node used by this port
- cunit : the phandle for the CUNIT node used by this port
- mpscrouting : the phandle for the MPSCROUTING node used by this port
- mpscintr : the phandle for the MPSCINTR node used by this port
- cell-index : the hardware index of this cell in the MPSC core
- max_idle : value needed for MPSC CHR3 (Maximum Frame Length)
register
- interrupts : <a> where a is the interrupt number for the MPSC.
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
Example Discovery MPSCINTR node:
mpsc@8000 {
device_type = "serial";
compatible = "marvell,mv64360-mpsc";
reg = <0x8000 0x38>;
virtual-reg = <0xf1008000>;
sdma = <&SDMA0>;
brg = <&BRG0>;
cunit = <&CUNIT>;
mpscrouting = <&MPSCROUTING>;
mpscintr = <&MPSCINTR>;
cell-index = <0>;
max_idle = <40>;
interrupts = <40>;
interrupt-parent = <&PIC>;
};
j) Marvell Discovery Watch Dog Timer nodes
Represent the Discovery's watchdog timer hardware
Required properties:
- compatible : "marvell,mv64360-wdt"
- reg : Offset and length of the register set for this device
Example Discovery Watch Dog Timer node:
wdt@b410 {
compatible = "marvell,mv64360-wdt";
reg = <0xb410 0x8>;
};
k) Marvell Discovery I2C nodes
Represent the Discovery's I2C hardware
Required properties:
- device_type : "i2c"
- compatible : "marvell,mv64360-i2c"
- reg : Offset and length of the register set for this device
- interrupts : <a> where a is the interrupt number for the I2C.
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
Example Discovery I2C node:
compatible = "marvell,mv64360-i2c";
reg = <0xc000 0x20>;
virtual-reg = <0xf100c000>;
interrupts = <37>;
interrupt-parent = <&PIC>;
};
l) Marvell Discovery PIC (Programmable Interrupt Controller) nodes
Represent the Discovery's PIC hardware
Required properties:
- #interrupt-cells : <1>
- #address-cells : <0>
- compatible : "marvell,mv64360-pic"
- reg : Offset and length of the register set for this device
- interrupt-controller
Example Discovery PIC node:
pic {
#interrupt-cells = <1>;
#address-cells = <0>;
compatible = "marvell,mv64360-pic";
reg = <0x0 0x88>;
interrupt-controller;
};
m) Marvell Discovery MPP (Multipurpose Pins) multiplexing nodes
Represent the Discovery's MPP hardware
Required properties:
- compatible : "marvell,mv64360-mpp"
- reg : Offset and length of the register set for this device
Example Discovery MPP node:
mpp@f000 {
compatible = "marvell,mv64360-mpp";
reg = <0xf000 0x10>;
};
n) Marvell Discovery GPP (General Purpose Pins) nodes
Represent the Discovery's GPP hardware
Required properties:
- compatible : "marvell,mv64360-gpp"
- reg : Offset and length of the register set for this device
Example Discovery GPP node:
gpp@f000 {
compatible = "marvell,mv64360-gpp";
reg = <0xf100 0x20>;
};
o) Marvell Discovery PCI host bridge node
Represents the Discovery's PCI host bridge device. The properties
for this node conform to Rev 2.1 of the PCI Bus Binding to IEEE
1275-1994. A typical value for the compatible property is
"marvell,mv64360-pci".
Example Discovery PCI host bridge node
pci@80000000 {
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
device_type = "pci";
compatible = "marvell,mv64360-pci";
reg = <0xcf8 0x8>;
ranges = <0x01000000 0x0 0x0
0x88000000 0x0 0x01000000
0x02000000 0x0 0x80000000
0x80000000 0x0 0x08000000>;
bus-range = <0 255>;
clock-frequency = <66000000>;
interrupt-parent = <&PIC>;
interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
interrupt-map = <
/* IDSEL 0x0a */
0x5000 0 0 1 &PIC 80
0x5000 0 0 2 &PIC 81
0x5000 0 0 3 &PIC 91
0x5000 0 0 4 &PIC 93
/* IDSEL 0x0b */
0x5800 0 0 1 &PIC 91
0x5800 0 0 2 &PIC 93
0x5800 0 0 3 &PIC 80
0x5800 0 0 4 &PIC 81
/* IDSEL 0x0c */
0x6000 0 0 1 &PIC 91
0x6000 0 0 2 &PIC 93
0x6000 0 0 3 &PIC 80
0x6000 0 0 4 &PIC 81
/* IDSEL 0x0d */
0x6800 0 0 1 &PIC 93
0x6800 0 0 2 &PIC 80
0x6800 0 0 3 &PIC 81
0x6800 0 0 4 &PIC 91
>;
};
p) Marvell Discovery CPU Error nodes
Represent the Discovery's CPU error handler device.
Required properties:
- compatible : "marvell,mv64360-cpu-error"
- reg : Offset and length of the register set for this device
- interrupts : the interrupt number for this device
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
Example Discovery CPU Error node:
cpu-error@0070 {
compatible = "marvell,mv64360-cpu-error";
reg = <0x70 0x10 0x128 0x28>;
interrupts = <3>;
interrupt-parent = <&PIC>;
};
q) Marvell Discovery SRAM Controller nodes
Represent the Discovery's SRAM controller device.
Required properties:
- compatible : "marvell,mv64360-sram-ctrl"
- reg : Offset and length of the register set for this device
- interrupts : the interrupt number for this device
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
Example Discovery SRAM Controller node:
sram-ctrl@0380 {
compatible = "marvell,mv64360-sram-ctrl";
reg = <0x380 0x80>;
interrupts = <13>;
interrupt-parent = <&PIC>;
};
r) Marvell Discovery PCI Error Handler nodes
Represent the Discovery's PCI error handler device.
Required properties:
- compatible : "marvell,mv64360-pci-error"
- reg : Offset and length of the register set for this device
- interrupts : the interrupt number for this device
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
Example Discovery PCI Error Handler node:
pci-error@1d40 {
compatible = "marvell,mv64360-pci-error";
reg = <0x1d40 0x40 0xc28 0x4>;
interrupts = <12>;
interrupt-parent = <&PIC>;
};
s) Marvell Discovery Memory Controller nodes
Represent the Discovery's memory controller device.
Required properties:
- compatible : "marvell,mv64360-mem-ctrl"
- reg : Offset and length of the register set for this device
- interrupts : the interrupt number for this device
- interrupt-parent : the phandle for the interrupt controller
that services interrupts for this device.
Example Discovery Memory Controller node:
mem-ctrl@1400 {
compatible = "marvell,mv64360-mem-ctrl";
reg = <0x1400 0x60>;
interrupts = <17>;
interrupt-parent = <&PIC>;
};
VIII - Specifying interrupt information for devices
===================================================
The device tree represents the busses and devices of a hardware
@ -2905,6 +3433,54 @@ encodings listed below:
2 = high to low edge sensitive type enabled
3 = low to high edge sensitive type enabled
VIII - Specifying GPIO information for devices
==============================================
1) gpios property
-----------------
Nodes that makes use of GPIOs should define them using `gpios' property,
format of which is: <&gpio-controller1-phandle gpio1-specifier
&gpio-controller2-phandle gpio2-specifier
0 /* holes are permitted, means no GPIO 3 */
&gpio-controller4-phandle gpio4-specifier
...>;
Note that gpio-specifier length is controller dependent.
gpio-specifier may encode: bank, pin position inside the bank,
whether pin is open-drain and whether pin is logically inverted.
Example of the node using GPIOs:
node {
gpios = <&qe_pio_e 18 0>;
};
In this example gpio-specifier is "18 0" and encodes GPIO pin number,
and empty GPIO flags as accepted by the "qe_pio_e" gpio-controller.
2) gpio-controller nodes
------------------------
Every GPIO controller node must have #gpio-cells property defined,
this information will be used to translate gpio-specifiers.
Example of two SOC GPIO banks defined as gpio-controller nodes:
qe_pio_a: gpio-controller@1400 {
#gpio-cells = <2>;
compatible = "fsl,qe-pario-bank-a", "fsl,qe-pario-bank";
reg = <0x1400 0x18>;
gpio-controller;
};
qe_pio_e: gpio-controller@1460 {
#gpio-cells = <2>;
compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank";
reg = <0x1460 0x18>;
gpio-controller;
};
Appendix A - Sample SOC node for MPC8540
========================================

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Hypervisor-Assisted Dump
------------------------
November 2007
The goal of hypervisor-assisted dump is to enable the dump of
a crashed system, and to do so from a fully-reset system, and
to minimize the total elapsed time until the system is back
in production use.
As compared to kdump or other strategies, hypervisor-assisted
dump offers several strong, practical advantages:
-- Unlike kdump, the system has been reset, and loaded
with a fresh copy of the kernel. In particular,
PCI and I/O devices have been reinitialized and are
in a clean, consistent state.
-- As the dump is performed, the dumped memory becomes
immediately available to the system for normal use.
-- After the dump is completed, no further reboots are
required; the system will be fully usable, and running
in it's normal, production mode on it normal kernel.
The above can only be accomplished by coordination with,
and assistance from the hypervisor. The procedure is
as follows:
-- When a system crashes, the hypervisor will save
the low 256MB of RAM to a previously registered
save region. It will also save system state, system
registers, and hardware PTE's.
-- After the low 256MB area has been saved, the
hypervisor will reset PCI and other hardware state.
It will *not* clear RAM. It will then launch the
bootloader, as normal.
-- The freshly booted kernel will notice that there
is a new node (ibm,dump-kernel) in the device tree,
indicating that there is crash data available from
a previous boot. It will boot into only 256MB of RAM,
reserving the rest of system memory.
-- Userspace tools will parse /sys/kernel/release_region
and read /proc/vmcore to obtain the contents of memory,
which holds the previous crashed kernel. The userspace
tools may copy this info to disk, or network, nas, san,
iscsi, etc. as desired.
For Example: the values in /sys/kernel/release-region
would look something like this (address-range pairs).
CPU:0x177fee000-0x10000: HPTE:0x177ffe020-0x1000: /
DUMP:0x177fff020-0x10000000, 0x10000000-0x16F1D370A
-- As the userspace tools complete saving a portion of
dump, they echo an offset and size to
/sys/kernel/release_region to release the reserved
memory back to general use.
An example of this is:
"echo 0x40000000 0x10000000 > /sys/kernel/release_region"
which will release 256MB at the 1GB boundary.
Please note that the hypervisor-assisted dump feature
is only available on Power6-based systems with recent
firmware versions.
Implementation details:
----------------------
During boot, a check is made to see if firmware supports
this feature on this particular machine. If it does, then
we check to see if a active dump is waiting for us. If yes
then everything but 256 MB of RAM is reserved during early
boot. This area is released once we collect a dump from user
land scripts that are run. If there is dump data, then
the /sys/kernel/release_region file is created, and
the reserved memory is held.
If there is no waiting dump data, then only the highest
256MB of the ram is reserved as a scratch area. This area
is *not* released: this region will be kept permanently
reserved, so that it can act as a receptacle for a copy
of the low 256MB in the case a crash does occur. See,
however, "open issues" below, as to whether
such a reserved region is really needed.
Currently the dump will be copied from /proc/vmcore to a
a new file upon user intervention. The starting address
to be read and the range for each data point in provided
in /sys/kernel/release_region.
The tools to examine the dump will be same as the ones
used for kdump.
General notes:
--------------
Security: please note that there are potential security issues
with any sort of dump mechanism. In particular, plaintext
(unencrypted) data, and possibly passwords, may be present in
the dump data. Userspace tools must take adequate precautions to
preserve security.
Open issues/ToDo:
------------
o The various code paths that tell the hypervisor that a crash
occurred, vs. it simply being a normal reboot, should be
reviewed, and possibly clarified/fixed.
o Instead of using /sys/kernel, should there be a /sys/dump
instead? There is a dump_subsys being created by the s390 code,
perhaps the pseries code should use a similar layout as well.
o Is reserving a 256MB region really required? The goal of
reserving a 256MB scratch area is to make sure that no
important crash data is clobbered when the hypervisor
save low mem to the scratch area. But, if one could assure
that nothing important is located in some 256MB area, then
it would not need to be reserved. Something that can be
improved in subsequent versions.
o Still working the kdump team to integrate this with kdump,
some work remains but this would not affect the current
patches.
o Still need to write a shell script, to copy the dump away.
Currently I am parsing it manually.

96
Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c Normal file
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/*
* Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
*
* Tests if the control register is updated correctly
* at context switches
*
* Warning: this test will cause a very high load for a few seconds
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <inttypes.h>
#include <wait.h>
#include <sys/prctl.h>
#include <linux/prctl.h>
/* Get/set the process' ability to use the timestamp counter instruction */
#ifndef PR_GET_TSC
#define PR_GET_TSC 25
#define PR_SET_TSC 26
# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
#endif
uint64_t rdtsc() {
uint32_t lo, hi;
/* We cannot use "=A", since this would use %rax on x86_64 */
__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
return (uint64_t)hi << 32 | lo;
}
void sigsegv_expect(int sig)
{
/* */
}
void segvtask(void)
{
if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0)
{
perror("prctl");
exit(0);
}
signal(SIGSEGV, sigsegv_expect);
alarm(10);
rdtsc();
fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n");
exit(0);
}
void sigsegv_fail(int sig)
{
fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n");
exit(0);
}
void rdtsctask(void)
{
if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0)
{
perror("prctl");
exit(0);
}
signal(SIGSEGV, sigsegv_fail);
alarm(10);
for(;;) rdtsc();
}
int main(int argc, char **argv)
{
int n_tasks = 100, i;
fprintf(stderr, "[No further output means we're allright]\n");
for (i=0; i<n_tasks; i++)
if (fork() == 0)
{
if (i & 1)
segvtask();
else
rdtsctask();
}
for (i=0; i<n_tasks; i++)
wait(NULL);
exit(0);
}

95
Documentation/prctl/disable-tsc-on-off-stress-test.c Normal file
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@ -0,0 +1,95 @@
/*
* Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
*
* Tests if the control register is updated correctly
* when set with prctl()
*
* Warning: this test will cause a very high load for a few seconds
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <inttypes.h>
#include <wait.h>
#include <sys/prctl.h>
#include <linux/prctl.h>
/* Get/set the process' ability to use the timestamp counter instruction */
#ifndef PR_GET_TSC
#define PR_GET_TSC 25
#define PR_SET_TSC 26
# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
#endif
/* snippet from wikipedia :-) */
uint64_t rdtsc() {
uint32_t lo, hi;
/* We cannot use "=A", since this would use %rax on x86_64 */
__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
return (uint64_t)hi << 32 | lo;
}
int should_segv = 0;
void sigsegv_cb(int sig)
{
if (!should_segv)
{
fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n");
exit(0);
}
if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0)
{
perror("prctl");
exit(0);
}
should_segv = 0;
rdtsc();
}
void task(void)
{
signal(SIGSEGV, sigsegv_cb);
alarm(10);
for(;;)
{
rdtsc();
if (should_segv)
{
fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n");
exit(0);
}
if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0)
{
perror("prctl");
exit(0);
}
should_segv = 1;
}
}
int main(int argc, char **argv)
{
int n_tasks = 100, i;
fprintf(stderr, "[No further output means we're allright]\n");
for (i=0; i<n_tasks; i++)
if (fork() == 0)
task();
for (i=0; i<n_tasks; i++)
wait(NULL);
exit(0);
}

94
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@ -0,0 +1,94 @@
/*
* Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...)
*
* Basic test to test behaviour of PR_GET_TSC and PR_SET_TSC
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <inttypes.h>
#include <sys/prctl.h>
#include <linux/prctl.h>
/* Get/set the process' ability to use the timestamp counter instruction */
#ifndef PR_GET_TSC
#define PR_GET_TSC 25
#define PR_SET_TSC 26
# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */
# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */
#endif
const char *tsc_names[] =
{
[0] = "[not set]",
[PR_TSC_ENABLE] = "PR_TSC_ENABLE",
[PR_TSC_SIGSEGV] = "PR_TSC_SIGSEGV",
};
uint64_t rdtsc() {
uint32_t lo, hi;
/* We cannot use "=A", since this would use %rax on x86_64 */
__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
return (uint64_t)hi << 32 | lo;
}
void sigsegv_cb(int sig)
{
int tsc_val = 0;
printf("[ SIG_SEGV ]\n");
printf("prctl(PR_GET_TSC, &tsc_val); ");
fflush(stdout);
if ( prctl(PR_GET_TSC, &tsc_val) == -1)
perror("prctl");
printf("tsc_val == %s\n", tsc_names[tsc_val]);
printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n");
fflush(stdout);
if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1)
perror("prctl");
printf("rdtsc() == ");
}
int main(int argc, char **argv)
{
int tsc_val = 0;
signal(SIGSEGV, sigsegv_cb);
printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
printf("prctl(PR_GET_TSC, &tsc_val); ");
fflush(stdout);
if ( prctl(PR_GET_TSC, &tsc_val) == -1)
perror("prctl");
printf("tsc_val == %s\n", tsc_names[tsc_val]);
printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n");
fflush(stdout);
if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1)
perror("prctl");
printf("rdtsc() == %llu\n", (unsigned long long)rdtsc());
printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV)\n");
fflush(stdout);
if ( prctl(PR_SET_TSC, PR_TSC_SIGSEGV) == -1)
perror("prctl");
printf("rdtsc() == ");
fflush(stdout);
printf("%llu\n", (unsigned long long)rdtsc());
fflush(stdout);
exit(EXIT_SUCCESS);
}

21
Documentation/s390/s390dbf.txt
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@ -115,6 +115,27 @@ Return Value: Handle for generated debug area
Description: Allocates memory for a debug log
Must not be called within an interrupt handler
----------------------------------------------------------------------------
debug_info_t *debug_register_mode(char *name, int pages, int nr_areas,
int buf_size, mode_t mode, uid_t uid,
gid_t gid);
Parameter: name: Name of debug log (e.g. used for debugfs entry)
pages: Number of pages, which will be allocated per area
nr_areas: Number of debug areas
buf_size: Size of data area in each debug entry
mode: File mode for debugfs files. E.g. S_IRWXUGO
uid: User ID for debugfs files. Currently only 0 is
supported.
gid: Group ID for debugfs files. Currently only 0 is
supported.
Return Value: Handle for generated debug area
NULL if register failed
Description: Allocates memory for a debug log
Must not be called within an interrupt handler
---------------------------------------------------------------------------
void debug_unregister (debug_info_t * id);

59
Documentation/sched-rt-group.txt
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@ -1,59 +0,0 @@
Real-Time group scheduling.
The problem space:
In order to schedule multiple groups of realtime tasks each group must
be assigned a fixed portion of the CPU time available. Without a minimum
guarantee a realtime group can obviously fall short. A fuzzy upper limit
is of no use since it cannot be relied upon. Which leaves us with just
the single fixed portion.
CPU time is divided by means of specifying how much time can be spent
running in a given period. Say a frame fixed realtime renderer must
deliver 25 frames a second, which yields a period of 0.04s. Now say
it will also have to play some music and respond to input, leaving it
with around 80% for the graphics. We can then give this group a runtime
of 0.8 * 0.04s = 0.032s.
This way the graphics group will have a 0.04s period with a 0.032s runtime
limit.
Now if the audio thread needs to refill the DMA buffer every 0.005s, but
needs only about 3% CPU time to do so, it can do with a 0.03 * 0.005s
= 0.00015s.
The Interface:
system wide:
/proc/sys/kernel/sched_rt_period_ms
/proc/sys/kernel/sched_rt_runtime_us
CONFIG_FAIR_USER_SCHED
/sys/kernel/uids/<uid>/cpu_rt_runtime_us
or
CONFIG_FAIR_CGROUP_SCHED
/cgroup/<cgroup>/cpu.rt_runtime_us
[ time is specified in us because the interface is s32; this gives an
operating range of ~35m to 1us ]
The period takes values in [ 1, INT_MAX ], runtime in [ -1, INT_MAX - 1 ].
A runtime of -1 specifies runtime == period, ie. no limit.
New groups get the period from /proc/sys/kernel/sched_rt_period_us and
a runtime of 0.
Settings are constrained to:
\Sum_{i} runtime_{i} / global_period <= global_runtime / global_period
in order to keep the configuration schedulable.

2
Documentation/scheduler/00-INDEX
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@ -12,5 +12,7 @@ sched-domains.txt
- information on scheduling domains.
sched-nice-design.txt
- How and why the scheduler's nice levels are implemented.
sched-rt-group.txt
- real-time group scheduling.
sched-stats.txt
- information on schedstats (Linux Scheduler Statistics).

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Real-Time group scheduling
--------------------------
CONTENTS
========
1. Overview
1.1 The problem
1.2 The solution
2. The interface
2.1 System-wide settings
2.2 Default behaviour
2.3 Basis for grouping tasks
3. Future plans
1. Overview
===========
1.1 The problem
---------------
Realtime scheduling is all about determinism, a group has to be able to rely on
the amount of bandwidth (eg. CPU time) being constant. In order to schedule
multiple groups of realtime tasks, each group must be assigned a fixed portion
of the CPU time available. Without a minimum guarantee a realtime group can
obviously fall short. A fuzzy upper limit is of no use since it cannot be
relied upon. Which leaves us with just the single fixed portion.
1.2 The solution
----------------
CPU time is divided by means of specifying how much time can be spent running
in a given period. We allocate this "run time" for each realtime group which
the other realtime groups will not be permitted to use.
Any time not allocated to a realtime group will be used to run normal priority
tasks (SCHED_OTHER). Any allocated run time not used will also be picked up by
SCHED_OTHER.
Let's consider an example: a frame fixed realtime renderer must deliver 25
frames a second, which yields a period of 0.04s per frame. Now say it will also
have to play some music and respond to input, leaving it with around 80% CPU
time dedicated for the graphics. We can then give this group a run time of 0.8
* 0.04s = 0.032s.
This way the graphics group will have a 0.04s period with a 0.032s run time
limit. Now if the audio thread needs to refill the DMA buffer every 0.005s, but
needs only about 3% CPU time to do so, it can do with a 0.03 * 0.005s =
0.00015s. So this group can be scheduled with a period of 0.005s and a run time
of 0.00015s.
The remaining CPU time will be used for user input and other tass. Because
realtime tasks have explicitly allocated the CPU time they need to perform
their tasks, buffer underruns in the graphocs or audio can be eliminated.
NOTE: the above example is not fully implemented as of yet (2.6.25). We still
lack an EDF scheduler to make non-uniform periods usable.
2. The Interface
================
2.1 System wide settings
------------------------
The system wide settings are configured under the /proc virtual file system:
/proc/sys/kernel/sched_rt_period_us:
The scheduling period that is equivalent to 100% CPU bandwidth
/proc/sys/kernel/sched_rt_runtime_us:
A global limit on how much time realtime scheduling may use. Even without
CONFIG_RT_GROUP_SCHED enabled, this will limit time reserved to realtime
processes. With CONFIG_RT_GROUP_SCHED it signifies the total bandwidth
available to all realtime groups.
* Time is specified in us because the interface is s32. This gives an
operating range from 1us to about 35 minutes.
* sched_rt_period_us takes values from 1 to INT_MAX.
* sched_rt_runtime_us takes values from -1 to (INT_MAX - 1).
* A run time of -1 specifies runtime == period, ie. no limit.
2.2 Default behaviour
---------------------
The default values for sched_rt_period_us (1000000 or 1s) and
sched_rt_runtime_us (950000 or 0.95s). This gives 0.05s to be used by
SCHED_OTHER (non-RT tasks). These defaults were chosen so that a run-away
realtime tasks will not lock up the machine but leave a little time to recover
it. By setting runtime to -1 you'd get the old behaviour back.
By default all bandwidth is assigned to the root group and new groups get the
period from /proc/sys/kernel/sched_rt_period_us and a run time of 0. If you
want to assign bandwidth to another group, reduce the root group's bandwidth
and assign some or all of the difference to another group.
Realtime group scheduling means you have to assign a portion of total CPU
bandwidth to the group before it will accept realtime tasks. Therefore you will
not be able to run realtime tasks as any user other than root until you have
done that, even if the user has the rights to run processes with realtime
priority!
2.3 Basis for grouping tasks
----------------------------
There are two compile-time settings for allocating CPU bandwidth. These are
configured using the "Basis for grouping tasks" multiple choice menu under
General setup > Group CPU Scheduler:
a. CONFIG_USER_SCHED (aka "Basis for grouping tasks" = "user id")
This lets you use the virtual files under
"/sys/kernel/uids/<uid>/cpu_rt_runtime_us" to control he CPU time reserved for
each user .
The other option is:
.o CONFIG_CGROUP_SCHED (aka "Basis for grouping tasks" = "Control groups")
This uses the /cgroup virtual file system and "/cgroup/<cgroup>/cpu.rt_runtime_us"
to control the CPU time reserved for each control group instead.
For more information on working with control groups, you should read
Documentation/cgroups.txt as well.
Group settings are checked against the following limits in order to keep the configuration
schedulable:
\Sum_{i} runtime_{i} / global_period <= global_runtime / global_period
For now, this can be simplified to just the following (but see Future plans):
\Sum_{i} runtime_{i} <= global_runtime
3. Future plans
===============
There is work in progress to make the scheduling period for each group
("/sys/kernel/uids/<uid>/cpu_rt_period_us" or
"/cgroup/<cgroup>/cpu.rt_period_us" respectively) configurable as well.
The constraint on the period is that a subgroup must have a smaller or
equal period to its parent. But realistically its not very useful _yet_
as its prone to starvation without deadline scheduling.
Consider two sibling groups A and B; both have 50% bandwidth, but A's
period is twice the length of B's.
* group A: period=100000us, runtime=10000us
- this runs for 0.01s once every 0.1s
* group B: period= 50000us, runtime=10000us
- this runs for 0.01s twice every 0.1s (or once every 0.05 sec).
This means that currently a while (1) loop in A will run for the full period of
B and can starve B's tasks (assuming they are of lower priority) for a whole
period.
The next project will be SCHED_EDF (Earliest Deadline First scheduling) to bring
full deadline scheduling to the linux kernel. Deadline scheduling the above
groups and treating end of the period as a deadline will ensure that they both
get their allocated time.
Implementing SCHED_EDF might take a while to complete. Priority Inheritance is
the biggest challenge as the current linux PI infrastructure is geared towards
the limited static priority levels 0-139. With deadline scheduling you need to
do deadline inheritance (since priority is inversely proportional to the
deadline delta (deadline - now).
This means the whole PI machinery will have to be reworked - and that is one of
the most complex pieces of code we have.

2
Documentation/scheduler/sched-stats.txt
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@ -142,7 +142,7 @@ of idleness (idle, busy, and newly idle):
/proc/<pid>/schedstat
----------------
schedstats also adds a new /proc/<pid/schedstat file to include some of
schedstats also adds a new /proc/<pid>/schedstat file to include some of
the same information on a per-process level. There are three fields in
this file correlating for that process to:
1) time spent on the cpu

6
Documentation/scsi/ChangeLog.arcmsr
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@ -109,4 +109,10 @@
** 8.replace pci_alloc_consistent()/pci_free_consistent() with kmalloc()/kfree() in arcmsr_iop_message_xfer()
** 9. fix the release of dma memory for type B in arcmsr_free_ccb_pool()
** 10.fix the arcmsr_polling_hbb_ccbdone()
** 1.20.00.15 02/27/2008 Erich Chen & Nick Cheng
** 1.arcmsr_iop_message_xfer() is called from atomic context under the
** queuecommand scsi_host_template handler. James Bottomley pointed out
** that the current GFP_KERNEL|GFP_DMA flags are wrong: firstly we are in
** atomic context, secondly this memory is not used for DMA.
** Also removed some unneeded casts. Thanks to Daniel Drake <dsd@gentoo.org>
**************************************************************************

12
Documentation/scsi/st.txt
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@ -2,7 +2,7 @@ This file contains brief information about the SCSI tape driver.
The driver is currently maintained by Kai Mäkisara (email
Kai.Makisara@kolumbus.fi)
Last modified: Mon Mar 7 21:14:44 2005 by kai.makisara
Last modified: Sun Feb 24 21:59:07 2008 by kai.makisara
BASICS
@ -133,6 +133,11 @@ the defaults set by the user. The value -1 means the default is not set. The
file 'dev' contains the device numbers corresponding to this device. The links
'device' and 'driver' point to the SCSI device and driver entries.
Each directory also contains the entry 'options' which shows the currently
enabled driver and mode options. The value in the file is a bit mask where the
bit definitions are the same as those used with MTSETDRVBUFFER in setting the
options.
A link named 'tape' is made from the SCSI device directory to the class
directory corresponding to the mode 0 auto-rewind device (e.g., st0).
@ -372,6 +377,11 @@ MTSETDRVBUFFER
MT_ST_SYSV sets the SYSV semantics (mode)
MT_ST_NOWAIT enables immediate mode (i.e., don't wait for
the command to finish) for some commands (e.g., rewind)
MT_ST_SILI enables setting the SILI bit in SCSI commands when
reading in variable block mode to enhance performance when
reading blocks shorter than the byte count; set this only
if you are sure that the drive supports SILI and the HBA
correctly returns transfer residuals
MT_ST_DEBUGGING debugging (global; debugging must be
compiled into the driver)
MT_ST_SETBOOLEANS

15
Documentation/spi/spi-summary
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@ -116,6 +116,13 @@ low order bit. So when a chip's timing diagram shows the clock
starting low (CPOL=0) and data stabilized for sampling during the
trailing clock edge (CPHA=1), that's SPI mode 1.
Note that the clock mode is relevant as soon as the chipselect goes
active. So the master must set the clock to inactive before selecting
a slave, and the slave can tell the chosen polarity by sampling the
clock level when its select line goes active. That's why many devices
support for example both modes 0 and 3: they don't care about polarity,
and alway clock data in/out on rising clock edges.
How do these driver programming interfaces work?
------------------------------------------------
@ -379,8 +386,14 @@ any more such messages.
+ when bidirectional reads and writes start ... by how its
sequence of spi_transfer requests is arranged;
+ which I/O buffers are used ... each spi_transfer wraps a
buffer for each transfer direction, supporting full duplex
(two pointers, maybe the same one in both cases) and half
duplex (one pointer is NULL) transfers;
+ optionally defining short delays after transfers ... using
the spi_transfer.delay_usecs setting;
the spi_transfer.delay_usecs setting (this delay can be the
only protocol effect, if the buffer length is zero);
+ whether the chipselect becomes inactive after a transfer and
any delay ... by using the spi_transfer.cs_change flag;

22
Documentation/spinlocks.txt
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@ -5,6 +5,28 @@ Please use DEFINE_SPINLOCK()/DEFINE_RWLOCK() or
__SPIN_LOCK_UNLOCKED()/__RW_LOCK_UNLOCKED() as appropriate for static
initialization.
Most of the time, you can simply turn:
static spinlock_t xxx_lock = SPIN_LOCK_UNLOCKED;
into:
static DEFINE_SPINLOCK(xxx_lock);
Static structure member variables go from:
struct foo bar {
.lock = SPIN_LOCK_UNLOCKED;
};
to:
struct foo bar {
.lock = __SPIN_LOCK_UNLOCKED(bar.lock);
};
Declaration of static rw_locks undergo a similar transformation.
Dynamic initialization, when necessary, may be performed as
demonstrated below.

7
Documentation/stable_kernel_rules.txt
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@ -16,8 +16,9 @@ Rules on what kind of patches are accepted, and which ones are not, into the
race can be exploited is also provided.
- It cannot contain any "trivial" fixes in it (spelling changes,
whitespace cleanups, etc).
- It must be accepted by the relevant subsystem maintainer.
- It must follow the Documentation/SubmittingPatches rules.
- It or an equivalent fix must already exist in Linus' tree. Quote the
respective commit ID in Linus' tree in your patch submission to -stable.
Procedure for submitting patches to the -stable tree:
@ -28,7 +29,9 @@ Procedure for submitting patches to the -stable tree:
queue, or a NAK if the patch is rejected. This response might take a few
days, according to the developer's schedules.
- If accepted, the patch will be added to the -stable queue, for review by
other developers.
other developers and by the relevant subsystem maintainer.
- If the stable@kernel.org address is added to a patch, when it goes into
Linus's tree it will automatically be emailed to the stable team.
- Security patches should not be sent to this alias, but instead to the
documented security@kernel.org address.

22
Documentation/thermal/sysfs-api.txt
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@ -143,10 +143,10 @@ type Strings which represent the thermal zone type.
This is given by thermal zone driver as part of registration.
Eg: "ACPI thermal zone" indicates it's a ACPI thermal device
RO
Optional
Required
temp Current temperature as reported by thermal zone (sensor)
Unit: degree Celsius
Unit: millidegree Celsius
RO
Required
@ -163,7 +163,7 @@ mode One of the predefined values in [kernel, user]
charge of the thermal management.
trip_point_[0-*]_temp The temperature above which trip point will be fired
Unit: degree Celsius
Unit: millidegree Celsius
RO
Optional
@ -193,7 +193,7 @@ type String which represents the type of device
eg. For memory controller device on intel_menlow platform:
this should be "Memory controller"
RO
Optional
Required
max_state The maximum permissible cooling state of this cooling device.
RO
@ -219,16 +219,16 @@ the sys I/F structure will be built like this:
|thermal_zone1:
|-----type: ACPI thermal zone
|-----temp: 37
|-----temp: 37000
|-----mode: kernel
|-----trip_point_0_temp: 100
|-----trip_point_0_temp: 100000
|-----trip_point_0_type: critical
|-----trip_point_1_temp: 80
|-----trip_point_1_temp: 80000
|-----trip_point_1_type: passive
|-----trip_point_2_temp: 70
|-----trip_point_2_type: active[0]
|-----trip_point_3_temp: 60
|-----trip_point_3_type: active[1]
|-----trip_point_2_temp: 70000
|-----trip_point_2_type: active0
|-----trip_point_3_temp: 60000
|-----trip_point_3_type: active1
|-----cdev0: --->/sys/class/thermal/cooling_device0
|-----cdev0_trip_point: 1 /* cdev0 can be used for passive */
|-----cdev1: --->/sys/class/thermal/cooling_device3

2
Documentation/hrtimers/highres.txt → Documentation/timers/highres.txt
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@ -98,7 +98,7 @@ System-level global event devices are used for the Linux periodic tick. Per-CPU
event devices are used to provide local CPU functionality such as process
accounting, profiling, and high resolution timers.
The management layer assignes one or more of the folliwing functions to a clock
The management layer assigns one or more of the following functions to a clock
event device:
- system global periodic tick (jiffies update)
- cpu local update_process_times

0
Documentation/hrtimers/hrtimers.txt → Documentation/timers/hrtimers.txt
Просмотреть файл

0
Documentation/hrtimer/timer_stats.txt → Documentation/timers/timer_stats.txt
Просмотреть файл

4
Documentation/unaligned-memory-access.txt
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@ -57,7 +57,7 @@ here; a summary of the common scenarios is presented below:
unaligned access to be corrected.
- Some architectures are not capable of unaligned memory access, but will
silently perform a different memory access to the one that was requested,
resulting a a subtle code bug that is hard to detect!
resulting in a subtle code bug that is hard to detect!
It should be obvious from the above that if your code causes unaligned
memory accesses to happen, your code will not work correctly on certain
@ -209,7 +209,7 @@ memory and you wish to avoid unaligned access, its usage is as follows:
u32 value = get_unaligned((u32 *) data);
These macros work work for memory accesses of any length (not just 32 bits as
These macros work for memory accesses of any length (not just 32 bits as
in the examples above). Be aware that when compared to standard access of
aligned memory, using these macros to access unaligned memory can be costly in
terms of performance.

6
Documentation/usb/usb-help.txt
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@ -1,5 +1,5 @@
usb-help.txt
2000-July-12
2008-Mar-7
For USB help other than the readme files that are located in
Documentation/usb/*, see the following:
@ -11,8 +11,6 @@ Linux USB Guide: http://linux-usb.sourceforge.net
Linux-USB device overview (working devices and drivers):
http://www.qbik.ch/usb/devices/
The Linux-USB mailing lists are:
linux-usb-users@lists.sourceforge.net for general user help
linux-usb-devel@lists.sourceforge.net for developer discussions
The Linux-USB mailing list is at linux-usb@vger.kernel.org
###

2
Documentation/video4linux/CARDLIST.em28xx
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@ -8,7 +8,7 @@
7 -> Leadtek Winfast USB II (em2800)
8 -> Kworld USB2800 (em2800)
9 -> Pinnacle Dazzle DVC 90/DVC 100 (em2820/em2840) [2304:0207,2304:021a]
10 -> Hauppauge WinTV HVR 900 (em2880) [2040:6500]
10 -> Hauppauge WinTV HVR 900 (em2880) [2040:6500,2040:6502]
11 -> Terratec Hybrid XS (em2880) [0ccd:0042]
12 -> Kworld PVR TV 2800 RF (em2820/em2840)
13 -> Terratec Prodigy XS (em2880) [0ccd:0047]

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