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提交 d6363844 编写于 作者: P Paul Mundt
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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into rmobile-latest
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Documentation/ABI/removed/o2cb
浏览文件 @ d6363844
What: /sys/o2cb symlink
Date: May 2011
KernelVersion: 2.6.40
KernelVersion: 3.0
Contact: ocfs2-devel@oss.oracle.com
Description: This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink is
removed when new versions of ocfs2-tools which know to look
......
Documentation/ABI/removed/raw1394
浏览文件 @ d6363844
......@@ -5,7 +5,7 @@ Description:
/dev/raw1394 was a character device file that allowed low-level
access to FireWire buses. Its major drawbacks were its inability
to implement sensible device security policies, and its low level
of abstraction that required userspace clients do duplicate much
of abstraction that required userspace clients to duplicate much
of the kernel's ieee1394 core functionality.
Replaced by /dev/fw*, i.e. the <linux/firewire-cdev.h> ABI of
firewire-core.
......
Documentation/ABI/testing/debugfs-ideapad 0 → 100644
浏览文件 @ d6363844
What: /sys/kernel/debug/ideapad/cfg
Date: Sep 2011
KernelVersion: 3.2
Contact: Ike Panhc <ike.pan@canonical.com>
Description:
cfg shows the return value of _CFG method in VPC2004 device. It tells machine
capability and what graphic component within the machine.
What: /sys/kernel/debug/ideapad/status
Date: Sep 2011
KernelVersion: 3.2
Contact: Ike Panhc <ike.pan@canonical.com>
Description:
status shows infos we can read and tells its meaning and value.
Documentation/ABI/testing/evm 0 → 100644
浏览文件 @ d6363844
What: security/evm
Date: March 2011
Contact: Mimi Zohar <zohar@us.ibm.com>
Description:
EVM protects a file's security extended attributes(xattrs)
against integrity attacks. The initial method maintains an
HMAC-sha1 value across the extended attributes, storing the
value as the extended attribute 'security.evm'.
EVM depends on the Kernel Key Retention System to provide it
with a trusted/encrypted key for the HMAC-sha1 operation.
The key is loaded onto the root's keyring using keyctl. Until
EVM receives notification that the key has been successfully
loaded onto the keyring (echo 1 > <securityfs>/evm), EVM
can not create or validate the 'security.evm' xattr, but
returns INTEGRITY_UNKNOWN. Loading the key and signaling EVM
should be done as early as possible. Normally this is done
in the initramfs, which has already been measured as part
of the trusted boot. For more information on creating and
loading existing trusted/encrypted keys, refer to:
Documentation/keys-trusted-encrypted.txt. (A sample dracut
patch, which loads the trusted/encrypted key and enables
EVM, is available from http://linux-ima.sourceforge.net/#EVM.)
Documentation/ABI/testing/sysfs-block
浏览文件 @ d6363844
......@@ -206,3 +206,16 @@ Description:
when a discarded area is read the discard_zeroes_data
parameter will be set to one. Otherwise it will be 0 and
the result of reading a discarded area is undefined.
What: /sys/block/<disk>/alias
Date: Aug 2011
Contact: Nao Nishijima <nao.nishijima.xt@hitachi.com>
Description:
A raw device name of a disk does not always point a same disk
each boot-up time. Therefore, users have to use persistent
device names, which udev creates when the kernel finds a disk,
instead of raw device name. However, kernel doesn't show those
persistent names on its messages (e.g. dmesg).
This file can store an alias of the disk and it would be
appeared in kernel messages if it is set. A disk can have an
alias which length is up to 255bytes. Users can use alphabets,
numbers, "-" and "_" in alias name. This file is writeonce.
Documentation/ABI/testing/sysfs-bus-bcma
浏览文件 @ d6363844
What: /sys/bus/bcma/devices/.../manuf
Date: May 2011
KernelVersion: 2.6.40
KernelVersion: 3.0
Contact: Rafał Miłecki <zajec5@gmail.com>
Description:
Each BCMA core has it's manufacturer id. See
......@@ -8,7 +8,7 @@ Description:
What: /sys/bus/bcma/devices/.../id
Date: May 2011
KernelVersion: 2.6.40
KernelVersion: 3.0
Contact: Rafał Miłecki <zajec5@gmail.com>
Description:
There are a few types of BCMA cores, they can be identified by
......@@ -16,7 +16,7 @@ Description:
What: /sys/bus/bcma/devices/.../rev
Date: May 2011
KernelVersion: 2.6.40
KernelVersion: 3.0
Contact: Rafał Miłecki <zajec5@gmail.com>
Description:
BCMA cores of the same type can still slightly differ depending
......@@ -24,7 +24,7 @@ Description:
What: /sys/bus/bcma/devices/.../class
Date: May 2011
KernelVersion: 2.6.40
KernelVersion: 3.0
Contact: Rafał Miłecki <zajec5@gmail.com>
Description:
Each BCMA core is identified by few fields, including class it
......
Documentation/ABI/testing/sysfs-bus-pci-drivers-ehci_hcd 0 → 100644
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What: /sys/bus/pci/drivers/ehci_hcd/.../companion
/sys/bus/usb/devices/usbN/../companion
Date: January 2007
KernelVersion: 2.6.21
Contact: Alan Stern <stern@rowland.harvard.edu>
Description:
PCI-based EHCI USB controllers (i.e., high-speed USB-2.0
controllers) are often implemented along with a set of
"companion" full/low-speed USB-1.1 controllers. When a
high-speed device is plugged in, the connection is routed
to the EHCI controller; when a full- or low-speed device
is plugged in, the connection is routed to the companion
controller.
Sometimes you want to force a high-speed device to connect
at full speed, which can be accomplished by forcing the
connection to be routed to the companion controller.
That's what this file does. Writing a port number to the
file causes connections on that port to be routed to the
companion controller, and writing the negative of a port
number returns the port to normal operation.
For example: To force the high-speed device attached to
port 4 on bus 2 to run at full speed:
echo 4 >/sys/bus/usb/devices/usb2/../companion
To return the port to high-speed operation:
echo -4 >/sys/bus/usb/devices/usb2/../companion
Reading the file gives the list of ports currently forced
to the companion controller.
Note: Some EHCI controllers do not have companions; they
may contain an internal "transaction translator" or they
may be attached directly to a "rate-matching hub". This
mechanism will not work with such controllers. Also, it
cannot be used to force a port on a high-speed hub to
connect at full speed.
Note: When this file was first added, it appeared in a
different sysfs directory. The location given above is
correct for 2.6.35 (and probably several earlier kernel
versions as well).
Documentation/ABI/testing/sysfs-bus-usb
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......@@ -142,3 +142,18 @@ Description:
such devices.
Users:
usb_modeswitch
What: /sys/bus/usb/devices/.../power/usb2_hardware_lpm
Date: September 2011
Contact: Andiry Xu <andiry.xu@amd.com>
Description:
If CONFIG_USB_SUSPEND is set and a USB 2.0 lpm-capable device
is plugged in to a xHCI host which support link PM, it will
perform a LPM test; if the test is passed and host supports
USB2 hardware LPM (xHCI 1.0 feature), USB2 hardware LPM will
be enabled for the device and the USB device directory will
contain a file named power/usb2_hardware_lpm. The file holds
a string value (enable or disable) indicating whether or not
USB2 hardware LPM is enabled for the device. Developer can
write y/Y/1 or n/N/0 to the file to enable/disable the
feature.
Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870
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......@@ -4,8 +4,8 @@ What: /sys/class/backlight/<backlight>/l2_bright_max
What: /sys/class/backlight/<backlight>/l3_office_max
What: /sys/class/backlight/<backlight>/l4_indoor_max
What: /sys/class/backlight/<backlight>/l5_dark_max
Date: Mai 2011
KernelVersion: 2.6.40
Date: May 2011
KernelVersion: 3.0
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Control the maximum brightness for <ambient light zone>
......@@ -18,8 +18,8 @@ What: /sys/class/backlight/<backlight>/l2_bright_dim
What: /sys/class/backlight/<backlight>/l3_office_dim
What: /sys/class/backlight/<backlight>/l4_indoor_dim
What: /sys/class/backlight/<backlight>/l5_dark_dim
Date: Mai 2011
KernelVersion: 2.6.40
Date: May 2011
KernelVersion: 3.0
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Control the dim brightness for <ambient light zone>
......@@ -29,8 +29,8 @@ Description:
this <ambient light zone>.
What: /sys/class/backlight/<backlight>/ambient_light_level
Date: Mai 2011
KernelVersion: 2.6.40
Date: May 2011
KernelVersion: 3.0
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Get conversion value of the light sensor.
......@@ -39,8 +39,8 @@ Description:
8000 (max ambient brightness)
What: /sys/class/backlight/<backlight>/ambient_light_zone
Date: Mai 2011
KernelVersion: 2.6.40
Date: May 2011
KernelVersion: 3.0
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Get/Set current ambient light zone. Reading returns
......
Documentation/ABI/testing/sysfs-class-devfreq 0 → 100644
浏览文件 @ d6363844
What: /sys/class/devfreq/.../
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
Provide a place in sysfs for the devfreq objects.
This allows accessing various devfreq specific variables.
The name of devfreq object denoted as ... is same as the
name of device using devfreq.
What: /sys/class/devfreq/.../governor
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/devfreq/.../governor shows the name of the
governor used by the corresponding devfreq object.
What: /sys/class/devfreq/.../cur_freq
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/devfreq/.../cur_freq shows the current
frequency of the corresponding devfreq object.
What: /sys/class/devfreq/.../central_polling
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/devfreq/.../central_polling shows whether
the devfreq ojbect is using devfreq-provided central
polling mechanism or not.
What: /sys/class/devfreq/.../polling_interval
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/devfreq/.../polling_interval shows and sets
the requested polling interval of the corresponding devfreq
object. The values are represented in ms. If the value is
less than 1 jiffy, it is considered to be 0, which means
no polling. This value is meaningless if the governor is
not polling; thus. If the governor is not using
devfreq-provided central polling
(/sys/class/devfreq/.../central_polling is 0), this value
may be useless.
What: /sys/class/devfreq/.../userspace/set_freq
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/devfreq/.../userspace/set_freq shows and
sets the requested frequency for the devfreq object if
userspace governor is in effect.
Documentation/ABI/testing/sysfs-class-net-mesh
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......@@ -22,6 +22,14 @@ Description:
mesh will be fragmented or silently discarded if the
packet size exceeds the outgoing interface MTU.
What: /sys/class/net/<mesh_iface>/mesh/ap_isolation
Date: May 2011
Contact: Antonio Quartulli <ordex@autistici.org>
Description:
Indicates whether the data traffic going from a
wireless client to another wireless client will be
silently dropped.
What: /sys/class/net/<mesh_iface>/mesh/gw_bandwidth
Date: October 2010
Contact: Marek Lindner <lindner_marek@yahoo.de>
......
Documentation/ABI/testing/sysfs-class-scsi_host 0 → 100644
浏览文件 @ d6363844
What: /sys/class/scsi_host/hostX/isci_id
Date: June 2011
Contact: Dave Jiang <dave.jiang@intel.com>
Description:
This file contains the enumerated host ID for the Intel
SCU controller. The Intel(R) C600 Series Chipset SATA/SAS
Storage Control Unit embeds up to two 4-port controllers in
a single PCI device. The controllers are enumerated in order
which usually means the lowest number scsi_host corresponds
with the first controller, but this association is not
guaranteed. The 'isci_id' attribute unambiguously identifies
the controller index: '0' for the first controller,
'1' for the second.
Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff 0 → 100644
浏览文件 @ d6363844
What: /sys/module/hid_logitech/drivers/hid:logitech/<dev>/range.
Date: July 2011
KernelVersion: 3.2
Contact: Michal Malý <madcatxster@gmail.com>
Description: Display minimum, maximum and current range of the steering
wheel. Writing a value within min and max boundaries sets the
range of the wheel.
Documentation/ABI/testing/sysfs-driver-wacom 0 → 100644
浏览文件 @ d6363844
What: /sys/class/hidraw/hidraw*/device/speed
Date: April 2010
Kernel Version: 2.6.35
Contact: linux-bluetooth@vger.kernel.org
Description:
The /sys/class/hidraw/hidraw*/device/speed file controls
reporting speed of Wacom bluetooth tablet. Reading from
this file returns 1 if tablet reports in high speed mode
or 0 otherwise. Writing to this file one of these values
switches reporting speed.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/led
Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
Attribute group for control of the status LEDs and the OLEDs.
This attribute group is only available for Intuos 4 M, L,
and XL (with LEDs and OLEDs) and Cintiq 21UX2 (LEDs only).
Therefore its presence implicitly signifies the presence of
said LEDs and OLEDs on the tablet device.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status0_luminance
Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets the status LED luminance (1..127)
when the stylus does not touch the tablet surface, and no
button is pressed on the stylus. This luminance level is
normally lower than the level when a button is pressed.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status1_luminance
Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets the status LED luminance (1..127)
when the stylus touches the tablet surface, or any button is
pressed on the stylus.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status_led0_select
Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets which one of the four (for Intuos 4)
or of the right four (for Cintiq 21UX2) status LEDs is active (0..3).
The other three LEDs on the same side are always inactive.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status_led1_select
Date: September 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets which one of the left four (for Cintiq 21UX2)
status LEDs is active (0..3). The other three LEDs on the left are always
inactive.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/buttons_luminance
Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets the overall luminance level (0..15)
of all eight button OLED displays.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/button<n>_rawimg
Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
When writing a 1024 byte raw image in Wacom Intuos 4
interleaving format to the file, the image shows up on Button N
of the device. The image is a 64x32 pixel 4-bit gray image. The
1024 byte binary is split up into 16x 64 byte chunks. Each 64
byte chunk encodes the image data for two consecutive lines on
the display. The low nibble of each byte contains the first
line, and the high nibble contains the second line.
Documentation/ABI/testing/sysfs-platform-ideapad-laptop
浏览文件 @ d6363844
......@@ -5,19 +5,4 @@ Contact: "Ike Panhc <ike.pan@canonical.com>"
Description:
Control the power of camera module. 1 means on, 0 means off.
What: /sys/devices/platform/ideapad/cfg
Date: Jun 2011
KernelVersion: 3.1
Contact: "Ike Panhc <ike.pan@canonical.com>"
Description:
Ideapad capability bits.
Bit 8-10: 1 - Intel graphic only
2 - ATI graphic only
3 - Nvidia graphic only
4 - Intel and ATI graphic
5 - Intel and Nvidia graphic
Bit 16: Bluetooth exist (1 for exist)
Bit 17: 3G exist (1 for exist)
Bit 18: Wifi exist (1 for exist)
Bit 19: Camera exist (1 for exist)
Documentation/ABI/testing/sysfs-wacom 已删除 100644 → 0
浏览文件 @ f1e0477a
What: /sys/class/hidraw/hidraw*/device/speed
Date: April 2010
Kernel Version: 2.6.35
Contact: linux-bluetooth@vger.kernel.org
Description:
The /sys/class/hidraw/hidraw*/device/speed file controls
reporting speed of wacom bluetooth tablet. Reading from
this file returns 1 if tablet reports in high speed mode
or 0 otherwise. Writing to this file one of these values
switches reporting speed.
Documentation/DMA-API.txt
浏览文件 @ d6363844
......@@ -50,6 +50,13 @@ specify the GFP_ flags (see kmalloc) for the allocation (the
implementation may choose to ignore flags that affect the location of
the returned memory, like GFP_DMA).
void *
dma_zalloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
Wraps dma_alloc_coherent() and also zeroes the returned memory if the
allocation attempt succeeded.
void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle)
......
Documentation/DocBook/80211.tmpl
浏览文件 @ d6363844
......@@ -433,8 +433,18 @@
Insert notes about VLAN interfaces with hw crypto here or
in the hw crypto chapter.
</para>
<section id="ps-client">
<title>support for powersaving clients</title>
!Pinclude/net/mac80211.h AP support for powersaving clients
</section>
!Finclude/net/mac80211.h ieee80211_get_buffered_bc
!Finclude/net/mac80211.h ieee80211_beacon_get
!Finclude/net/mac80211.h ieee80211_sta_eosp_irqsafe
!Finclude/net/mac80211.h ieee80211_frame_release_type
!Finclude/net/mac80211.h ieee80211_sta_ps_transition
!Finclude/net/mac80211.h ieee80211_sta_ps_transition_ni
!Finclude/net/mac80211.h ieee80211_sta_set_buffered
!Finclude/net/mac80211.h ieee80211_sta_block_awake
</chapter>
<chapter id="multi-iface">
......@@ -460,7 +470,6 @@
!Finclude/net/mac80211.h sta_notify_cmd
!Finclude/net/mac80211.h ieee80211_find_sta
!Finclude/net/mac80211.h ieee80211_find_sta_by_ifaddr
!Finclude/net/mac80211.h ieee80211_sta_block_awake
</chapter>
<chapter id="hardware-scan-offload">
......
Documentation/DocBook/media/dvb/dvbproperty.xml
浏览文件 @ d6363844
......@@ -352,6 +352,7 @@ typedef enum fe_delivery_system {
SYS_CMMB,
SYS_DAB,
SYS_DVBT2,
SYS_TURBO,
} fe_delivery_system_t;
</programlisting>
</section>
......@@ -809,6 +810,8 @@ typedef enum fe_hierarchy {
<listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
<listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem>
</itemizedlist>
<para>Future implementations might add those two missing parameters:</para>
<itemizedlist mark='opencircle'>
......@@ -818,25 +821,18 @@ typedef enum fe_hierarchy {
</section>
<section id="dvbs2-params">
<title>DVB-S2 delivery system</title>
<para>The following parameters are valid for DVB-S2:</para>
<para>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para>
<itemizedlist mark='opencircle'>
<listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
<listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
<listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
<listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
<listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem>
<listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem>
</itemizedlist>
<para>Future implementations might add those two missing parameters:</para>
</section>
<section id="turbo-params">
<title>Turbo code delivery system</title>
<para>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para>
<itemizedlist mark='opencircle'>
<listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem>
<listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem>
<listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
</itemizedlist>
</section>
<section id="isdbs-params">
......
Documentation/DocBook/media/dvb/intro.xml
浏览文件 @ d6363844
......@@ -205,7 +205,7 @@ a partial path like:</para>
additional include file <emphasis
role="tt">linux/dvb/version.h</emphasis> exists, which defines the
constant <emphasis role="tt">DVB_API_VERSION</emphasis>. This document
describes <emphasis role="tt">DVB_API_VERSION&#x00A0;3</emphasis>.
describes <emphasis role="tt">DVB_API_VERSION 5.4</emphasis>.
</para>
</section>
......
Documentation/DocBook/media/v4l/compat.xml
浏览文件 @ d6363844
......@@ -2370,6 +2370,14 @@ that used it. It was originally scheduled for removal in 2.6.35.
</listitem>
</orderedlist>
</section>
<section>
<title>V4L2 in Linux 3.2</title>
<orderedlist>
<listitem>
<para>V4L2_CTRL_FLAG_VOLATILE was added to signal volatile controls to userspace.</para>
</listitem>
</orderedlist>
</section>
<section id="other">
<title>Relation of V4L2 to other Linux multimedia APIs</title>
......
Documentation/DocBook/media/v4l/controls.xml
浏览文件 @ d6363844
......@@ -1455,7 +1455,7 @@ Applicable to the H264 encoder.</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-h264-vui-sar-idc">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_video_h264_vui_sar_idc</entry>
</row>
......@@ -1561,7 +1561,7 @@ Applicable to the H264 encoder.</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-h264-level">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_LEVEL</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_video_h264_level</entry>
</row>
......@@ -1641,7 +1641,7 @@ Possible values are:</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-mpeg4-level">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_video_mpeg4_level</entry>
</row>
......@@ -1689,9 +1689,9 @@ Possible values are:</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-h264-profile">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_PROFILE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_h264_profile</entry>
<entry>enum&nbsp;v4l2_mpeg_video_h264_profile</entry>
</row>
<row><entry spanname="descr">The profile information for H264.
Applicable to the H264 encoder.
......@@ -1774,9 +1774,9 @@ Possible values are:</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-mpeg4-profile">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_mpeg4_profile</entry>
<entry>enum&nbsp;v4l2_mpeg_video_mpeg4_profile</entry>
</row>
<row><entry spanname="descr">The profile information for MPEG4.
Applicable to the MPEG4 encoder.
......@@ -1820,9 +1820,9 @@ Applicable to the encoder.
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-multi-slice-mode">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_multi_slice_mode</entry>
<entry>enum&nbsp;v4l2_mpeg_video_multi_slice_mode</entry>
</row>
<row><entry spanname="descr">Determines how the encoder should handle division of frame into slices.
Applicable to the encoder.
......@@ -1868,9 +1868,9 @@ Applicable to the encoder.</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-h264-loop-filter-mode">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_h264_loop_filter_mode</entry>
<entry>enum&nbsp;v4l2_mpeg_video_h264_loop_filter_mode</entry>
</row>
<row><entry spanname="descr">Loop filter mode for H264 encoder.
Possible values are:</entry>
......@@ -1913,9 +1913,9 @@ Applicable to the H264 encoder.</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-h264-entropy-mode">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_h264_symbol_mode</entry>
<entry>enum&nbsp;v4l2_mpeg_video_h264_entropy_mode</entry>
</row>
<row><entry spanname="descr">Entropy coding mode for H264 - CABAC/CAVALC.
Applicable to the H264 encoder.
......@@ -2140,9 +2140,9 @@ previous frames. Applicable to the H264 encoder.</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-video-header-mode">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_HEADER_MODE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_header_mode</entry>
<entry>enum&nbsp;v4l2_mpeg_video_header_mode</entry>
</row>
<row><entry spanname="descr">Determines whether the header is returned as the first buffer or is
it returned together with the first frame. Applicable to encoders.
......@@ -2320,9 +2320,9 @@ Valid only when H.264 and macroblock level RC is enabled (<constant>V4L2_CID_MPE
Applicable to the H264 encoder.</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-mfc51-video-frame-skip-mode">
<entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_mfc51_frame_skip_mode</entry>
<entry>enum&nbsp;v4l2_mpeg_mfc51_video_frame_skip_mode</entry>
</row>
<row><entry spanname="descr">
Indicates in what conditions the encoder should skip frames. If encoding a frame would cause the encoded stream to be larger then
......@@ -2361,9 +2361,9 @@ the stream will meet tight bandwidth contraints. Applicable to encoders.
</entry>
</row>
<row><entry></entry></row>
<row>
<row id="v4l2-mpeg-mfc51-video-force-frame-type">
<entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_mpeg_mfc51_force_frame_type</entry>
<entry>enum&nbsp;v4l2_mpeg_mfc51_video_force_frame_type</entry>
</row>
<row><entry spanname="descr">Force a frame type for the next queued buffer. Applicable to encoders.
Possible values are:</entry>
......
Documentation/DocBook/media/v4l/dev-subdev.xml
浏览文件 @ d6363844
......@@ -266,7 +266,7 @@
<para>When satisfied with the try results, applications can set the active
formats by setting the <structfield>which</structfield> argument to
<constant>V4L2_SUBDEV_FORMAT_TRY</constant>. Active formats are changed
<constant>V4L2_SUBDEV_FORMAT_ACTIVE</constant>. Active formats are changed
exactly as try formats by drivers. To avoid modifying the hardware state
during format negotiation, applications should negotiate try formats first
and then modify the active settings using the try formats returned during
......
Documentation/DocBook/media/v4l/v4l2.xml
浏览文件 @ d6363844
......@@ -127,6 +127,13 @@ structs, ioctls) must be noted in more detail in the history chapter
(compat.xml), along with the possible impact on existing drivers and
applications. -->
<revision>
<revnumber>3.2</revnumber>
<date>2011-08-26</date>
<authorinitials>hv</authorinitials>
<revremark>Added V4L2_CTRL_FLAG_VOLATILE.</revremark>
</revision>
<revision>
<revnumber>3.1</revnumber>
<date>2011-06-27</date>
......@@ -410,7 +417,7 @@ and discussions on the V4L mailing list.</revremark>
</partinfo>
<title>Video for Linux Two API Specification</title>
<subtitle>Revision 3.1</subtitle>
<subtitle>Revision 3.2</subtitle>
<chapter id="common">
&sub-common;
......
Documentation/DocBook/media/v4l/vidioc-dqevent.xml
浏览文件 @ d6363844
......@@ -86,6 +86,12 @@
<entry>Event data for event V4L2_EVENT_CTRL.
</entry>
</row>
<row>
<entry></entry>
<entry>&v4l2-event-frame-sync;</entry>
<entry><structfield>frame</structfield></entry>
<entry>Event data for event V4L2_EVENT_FRAME_SYNC.</entry>
</row>
<row>
<entry></entry>
<entry>__u8</entry>
......@@ -135,6 +141,129 @@
</tgroup>
</table>
<table frame="none" pgwide="1" id="v4l2-event-vsync">
<title>struct <structname>v4l2_event_vsync</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u8</entry>
<entry><structfield>field</structfield></entry>
<entry>The upcoming field. See &v4l2-field;.</entry>
</row>
</tbody>
</tgroup>
</table>
<table frame="none" pgwide="1" id="v4l2-event-ctrl">
<title>struct <structname>v4l2_event_ctrl</structname></title>
<tgroup cols="4">
&cs-str;
<tbody valign="top">
<row>
<entry>__u32</entry>
<entry><structfield>changes</structfield></entry>
<entry></entry>
<entry>A bitmask that tells what has changed. See <xref linkend="changes-flags" />.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>type</structfield></entry>
<entry></entry>
<entry>The type of the control. See &v4l2-ctrl-type;.</entry>
</row>
<row>
<entry>union (anonymous)</entry>
<entry></entry>
<entry></entry>
<entry></entry>
</row>
<row>
<entry></entry>
<entry>__s32</entry>
<entry><structfield>value</structfield></entry>
<entry>The 32-bit value of the control for 32-bit control types.
This is 0 for string controls since the value of a string
cannot be passed using &VIDIOC-DQEVENT;.</entry>
</row>
<row>
<entry></entry>
<entry>__s64</entry>
<entry><structfield>value64</structfield></entry>
<entry>The 64-bit value of the control for 64-bit control types.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>flags</structfield></entry>
<entry></entry>
<entry>The control flags. See <xref linkend="control-flags" />.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>minimum</structfield></entry>
<entry></entry>
<entry>The minimum value of the control. See &v4l2-queryctrl;.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>maximum</structfield></entry>
<entry></entry>
<entry>The maximum value of the control. See &v4l2-queryctrl;.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>step</structfield></entry>
<entry></entry>
<entry>The step value of the control. See &v4l2-queryctrl;.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>default_value</structfield></entry>
<entry></entry>
<entry>The default value value of the control. See &v4l2-queryctrl;.</entry>
</row>
</tbody>
</tgroup>
</table>
<table frame="none" pgwide="1" id="v4l2-event-frame-sync">
<title>struct <structname>v4l2_event_frame_sync</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u32</entry>
<entry><structfield>frame_sequence</structfield></entry>
<entry>
The sequence number of the frame being received.
</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="changes-flags">
<title>Changes</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>V4L2_EVENT_CTRL_CH_VALUE</constant></entry>
<entry>0x0001</entry>
<entry>This control event was triggered because the value of the control
changed. Special case: if a button control is pressed, then this
event is sent as well, even though there is not explicit value
associated with a button control.</entry>
</row>
<row>
<entry><constant>V4L2_EVENT_CTRL_CH_FLAGS</constant></entry>
<entry>0x0002</entry>
<entry>This control event was triggered because the control flags
changed.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
......
Documentation/DocBook/media/v4l/vidioc-queryctrl.xml
浏览文件 @ d6363844
......@@ -406,6 +406,15 @@ flag is typically present for relative controls or action controls where
writing a value will cause the device to carry out a given action
(&eg; motor control) but no meaningful value can be returned.</entry>
</row>
<row>
<entry><constant>V4L2_CTRL_FLAG_VOLATILE</constant></entry>
<entry>0x0080</entry>
<entry>This control is volatile, which means that the value of the control
changes continuously. A typical example would be the current gain value if the device
is in auto-gain mode. In such a case the hardware calculates the gain value based on
the lighting conditions which can change over time. Note that setting a new value for
a volatile control will have no effect. The new value will just be ignored.</entry>
</row>
</tbody>
</tgroup>
</table>
......
Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml
浏览文件 @ d6363844
......@@ -138,6 +138,22 @@
field of the oldest event.</para>
</entry>
</row>
<row>
<entry><constant>V4L2_EVENT_FRAME_SYNC</constant></entry>
<entry>4</entry>
<entry>
<para>Triggered immediately when the reception of a
frame has begun. This event has a
&v4l2-event-frame-sync; associated with it.</para>
<para>If the hardware needs to be stopped in the case of a
buffer underrun it might not be able to generate this event.
In such cases the <structfield>frame_sequence</structfield>
field in &v4l2-event-frame-sync; will not be incremented. This
causes two consecutive frame sequence numbers to have n times
frame interval in between them.</para>
</entry>
</row>
<row>
<entry><constant>V4L2_EVENT_PRIVATE_START</constant></entry>
<entry>0x08000000</entry>
......@@ -183,113 +199,6 @@
</tgroup>
</table>
<table frame="none" pgwide="1" id="v4l2-event-vsync">
<title>struct <structname>v4l2_event_vsync</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u8</entry>
<entry><structfield>field</structfield></entry>
<entry>The upcoming field. See &v4l2-field;.</entry>
</row>
</tbody>
</tgroup>
</table>
<table frame="none" pgwide="1" id="v4l2-event-ctrl">
<title>struct <structname>v4l2_event_ctrl</structname></title>
<tgroup cols="4">
&cs-str;
<tbody valign="top">
<row>
<entry>__u32</entry>
<entry><structfield>changes</structfield></entry>
<entry></entry>
<entry>A bitmask that tells what has changed. See <xref linkend="changes-flags" />.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>type</structfield></entry>
<entry></entry>
<entry>The type of the control. See &v4l2-ctrl-type;.</entry>
</row>
<row>
<entry>union (anonymous)</entry>
<entry></entry>
<entry></entry>
<entry></entry>
</row>
<row>
<entry></entry>
<entry>__s32</entry>
<entry><structfield>value</structfield></entry>
<entry>The 32-bit value of the control for 32-bit control types.
This is 0 for string controls since the value of a string
cannot be passed using &VIDIOC-DQEVENT;.</entry>
</row>
<row>
<entry></entry>
<entry>__s64</entry>
<entry><structfield>value64</structfield></entry>
<entry>The 64-bit value of the control for 64-bit control types.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>flags</structfield></entry>
<entry></entry>
<entry>The control flags. See <xref linkend="control-flags" />.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>minimum</structfield></entry>
<entry></entry>
<entry>The minimum value of the control. See &v4l2-queryctrl;.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>maximum</structfield></entry>
<entry></entry>
<entry>The maximum value of the control. See &v4l2-queryctrl;.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>step</structfield></entry>
<entry></entry>
<entry>The step value of the control. See &v4l2-queryctrl;.</entry>
</row>
<row>
<entry>__s32</entry>
<entry><structfield>default_value</structfield></entry>
<entry></entry>
<entry>The default value value of the control. See &v4l2-queryctrl;.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="changes-flags">
<title>Changes</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>V4L2_EVENT_CTRL_CH_VALUE</constant></entry>
<entry>0x0001</entry>
<entry>This control event was triggered because the value of the control
changed. Special case: if a button control is pressed, then this
event is sent as well, even though there is not explicit value
associated with a button control.</entry>
</row>
<row>
<entry><constant>V4L2_EVENT_CTRL_CH_FLAGS</constant></entry>
<entry>0x0002</entry>
<entry>This control event was triggered because the control flags
changed.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
......
Documentation/DocBook/uio-howto.tmpl
浏览文件 @ d6363844
......@@ -529,7 +529,7 @@ memory (e.g. allocated with <function>kmalloc()</function>). There's also
</para></listitem>
<listitem><para>
<varname>unsigned long addr</varname>: Required if the mapping is used.
<varname>phys_addr_t addr</varname>: Required if the mapping is used.
Fill in the address of your memory block. This address is the one that
appears in sysfs.
</para></listitem>
......
Documentation/DocBook/writing-an-alsa-driver.tmpl
浏览文件 @ d6363844
......@@ -4288,7 +4288,7 @@ struct _snd_pcm_runtime {
<![CDATA[
struct snd_rawmidi *rmidi;
snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port, info_flags,
irq, irq_flags, &rmidi);
irq, &rmidi);
]]>
</programlisting>
</informalexample>
......@@ -4343,6 +4343,13 @@ struct _snd_pcm_runtime {
by itself to start processing the output stream in the irq handler.
</para>
<para>
If the MPU-401 interface shares its interrupt with the other logical
devices on the card, set <constant>MPU401_INFO_IRQ_HOOK</constant>
(see <link linkend="midi-interface-interrupt-handler"><citetitle>
below</citetitle></link>).
</para>
<para>
Usually, the port address corresponds to the command port and
port + 1 corresponds to the data port. If not, you may change
......@@ -4375,14 +4382,12 @@ struct _snd_pcm_runtime {
</para>
<para>
The 6th argument specifies the irq number for UART. If the irq
is already allocated, pass 0 to the 7th argument
(<parameter>irq_flags</parameter>). Otherwise, pass the flags
for irq allocation
(<constant>SA_XXX</constant> bits) to it, and the irq will be
reserved by the mpu401-uart layer. If the card doesn't generate
UART interrupts, pass -1 as the irq number. Then a timer
interrupt will be invoked for polling.
The 6th argument specifies the ISA irq number that will be
allocated. If no interrupt is to be allocated (because your
code is already allocating a shared interrupt, or because the
device does not use interrupts), pass -1 instead.
For a MPU-401 device without an interrupt, a polling timer
will be used instead.
</para>
</section>
......@@ -4390,12 +4395,13 @@ struct _snd_pcm_runtime {
<title>Interrupt Handler</title>
<para>
When the interrupt is allocated in
<function>snd_mpu401_uart_new()</function>, the private
interrupt handler is used, hence you don't have anything else to do
than creating the mpu401 stuff. Otherwise, you have to call
<function>snd_mpu401_uart_interrupt()</function> explicitly when
a UART interrupt is invoked and checked in your own interrupt
handler.
<function>snd_mpu401_uart_new()</function>, an exclusive ISA
interrupt handler is automatically used, hence you don't have
anything else to do than creating the mpu401 stuff. Otherwise, you
have to set <constant>MPU401_INFO_IRQ_HOOK</constant>, and call
<function>snd_mpu401_uart_interrupt()</function> explicitly from your
own interrupt handler when it has determined that a UART interrupt
has occurred.
</para>
<para>
......
Documentation/PCI/pci.txt
浏览文件 @ d6363844
......@@ -314,7 +314,7 @@ from the PCI device config space. Use the values in the pci_dev structure
as the PCI "bus address" might have been remapped to a "host physical"
address by the arch/chip-set specific kernel support.
See Documentation/IO-mapping.txt for how to access device registers
See Documentation/io-mapping.txt for how to access device registers
or device memory.
The device driver needs to call pci_request_region() to verify
......
Documentation/RCU/NMI-RCU.txt
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......@@ -95,7 +95,7 @@ not to return until all ongoing NMI handlers exit. It is therefore safe
to free up the handler's data as soon as synchronize_sched() returns.
Important note: for this to work, the architecture in question must
invoke irq_enter() and irq_exit() on NMI entry and exit, respectively.
invoke nmi_enter() and nmi_exit() on NMI entry and exit, respectively.
Answer to Quick Quiz
......
Documentation/RCU/lockdep-splat.txt 0 → 100644
浏览文件 @ d6363844
Lockdep-RCU was added to the Linux kernel in early 2010
(http://lwn.net/Articles/371986/). This facility checks for some common
misuses of the RCU API, most notably using one of the rcu_dereference()
family to access an RCU-protected pointer without the proper protection.
When such misuse is detected, an lockdep-RCU splat is emitted.
The usual cause of a lockdep-RCU slat is someone accessing an
RCU-protected data structure without either (1) being in the right kind of
RCU read-side critical section or (2) holding the right update-side lock.
This problem can therefore be serious: it might result in random memory
overwriting or worse. There can of course be false positives, this
being the real world and all that.
So let's look at an example RCU lockdep splat from 3.0-rc5, one that
has long since been fixed:
===============================
[ INFO: suspicious RCU usage. ]
-------------------------------
block/cfq-iosched.c:2776 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 0
3 locks held by scsi_scan_6/1552:
#0: (&shost->scan_mutex){+.+.+.}, at: [<ffffffff8145efca>]
scsi_scan_host_selected+0x5a/0x150
#1: (&eq->sysfs_lock){+.+...}, at: [<ffffffff812a5032>]
elevator_exit+0x22/0x60
#2: (&(&q->__queue_lock)->rlock){-.-...}, at: [<ffffffff812b6233>]
cfq_exit_queue+0x43/0x190
stack backtrace:
Pid: 1552, comm: scsi_scan_6 Not tainted 3.0.0-rc5 #17
Call Trace:
[<ffffffff810abb9b>] lockdep_rcu_dereference+0xbb/0xc0
[<ffffffff812b6139>] __cfq_exit_single_io_context+0xe9/0x120
[<ffffffff812b626c>] cfq_exit_queue+0x7c/0x190
[<ffffffff812a5046>] elevator_exit+0x36/0x60
[<ffffffff812a802a>] blk_cleanup_queue+0x4a/0x60
[<ffffffff8145cc09>] scsi_free_queue+0x9/0x10
[<ffffffff81460944>] __scsi_remove_device+0x84/0xd0
[<ffffffff8145dca3>] scsi_probe_and_add_lun+0x353/0xb10
[<ffffffff817da069>] ? error_exit+0x29/0xb0
[<ffffffff817d98ed>] ? _raw_spin_unlock_irqrestore+0x3d/0x80
[<ffffffff8145e722>] __scsi_scan_target+0x112/0x680
[<ffffffff812c690d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[<ffffffff817da069>] ? error_exit+0x29/0xb0
[<ffffffff812bcc60>] ? kobject_del+0x40/0x40
[<ffffffff8145ed16>] scsi_scan_channel+0x86/0xb0
[<ffffffff8145f0b0>] scsi_scan_host_selected+0x140/0x150
[<ffffffff8145f149>] do_scsi_scan_host+0x89/0x90
[<ffffffff8145f170>] do_scan_async+0x20/0x160
[<ffffffff8145f150>] ? do_scsi_scan_host+0x90/0x90
[<ffffffff810975b6>] kthread+0xa6/0xb0
[<ffffffff817db154>] kernel_thread_helper+0x4/0x10
[<ffffffff81066430>] ? finish_task_switch+0x80/0x110
[<ffffffff817d9c04>] ? retint_restore_args+0xe/0xe
[<ffffffff81097510>] ? __init_kthread_worker+0x70/0x70
[<ffffffff817db150>] ? gs_change+0xb/0xb
Line 2776 of block/cfq-iosched.c in v3.0-rc5 is as follows:
if (rcu_dereference(ioc->ioc_data) == cic) {
This form says that it must be in a plain vanilla RCU read-side critical
section, but the "other info" list above shows that this is not the
case. Instead, we hold three locks, one of which might be RCU related.
And maybe that lock really does protect this reference. If so, the fix
is to inform RCU, perhaps by changing __cfq_exit_single_io_context() to
take the struct request_queue "q" from cfq_exit_queue() as an argument,
which would permit us to invoke rcu_dereference_protected as follows:
if (rcu_dereference_protected(ioc->ioc_data,
lockdep_is_held(&q->queue_lock)) == cic) {
With this change, there would be no lockdep-RCU splat emitted if this
code was invoked either from within an RCU read-side critical section
or with the ->queue_lock held. In particular, this would have suppressed
the above lockdep-RCU splat because ->queue_lock is held (see #2 in the
list above).
On the other hand, perhaps we really do need an RCU read-side critical
section. In this case, the critical section must span the use of the
return value from rcu_dereference(), or at least until there is some
reference count incremented or some such. One way to handle this is to
add rcu_read_lock() and rcu_read_unlock() as follows:
rcu_read_lock();
if (rcu_dereference(ioc->ioc_data) == cic) {
spin_lock(&ioc->lock);
rcu_assign_pointer(ioc->ioc_data, NULL);
spin_unlock(&ioc->lock);
}
rcu_read_unlock();
With this change, the rcu_dereference() is always within an RCU
read-side critical section, which again would have suppressed the
above lockdep-RCU splat.
But in this particular case, we don't actually deference the pointer
returned from rcu_dereference(). Instead, that pointer is just compared
to the cic pointer, which means that the rcu_dereference() can be replaced
by rcu_access_pointer() as follows:
if (rcu_access_pointer(ioc->ioc_data) == cic) {
Because it is legal to invoke rcu_access_pointer() without protection,
this change would also suppress the above lockdep-RCU splat.
Documentation/RCU/lockdep.txt
浏览文件 @ d6363844
......@@ -32,9 +32,27 @@ checking of rcu_dereference() primitives:
srcu_dereference(p, sp):
Check for SRCU read-side critical section.
rcu_dereference_check(p, c):
Use explicit check expression "c". This is useful in
code that is invoked by both readers and updaters.
rcu_dereference_raw(p)
Use explicit check expression "c" along with
rcu_read_lock_held(). This is useful in code that is
invoked by both RCU readers and updaters.
rcu_dereference_bh_check(p, c):
Use explicit check expression "c" along with
rcu_read_lock_bh_held(). This is useful in code that
is invoked by both RCU-bh readers and updaters.
rcu_dereference_sched_check(p, c):
Use explicit check expression "c" along with
rcu_read_lock_sched_held(). This is useful in code that
is invoked by both RCU-sched readers and updaters.
srcu_dereference_check(p, c):
Use explicit check expression "c" along with
srcu_read_lock_held()(). This is useful in code that
is invoked by both SRCU readers and updaters.
rcu_dereference_index_check(p, c):
Use explicit check expression "c", but the caller
must supply one of the rcu_read_lock_held() functions.
This is useful in code that uses RCU-protected arrays
that is invoked by both RCU readers and updaters.
rcu_dereference_raw(p):
Don't check. (Use sparingly, if at all.)
rcu_dereference_protected(p, c):
Use explicit check expression "c", and omit all barriers
......@@ -48,13 +66,11 @@ checking of rcu_dereference() primitives:
value of the pointer itself, for example, against NULL.
The rcu_dereference_check() check expression can be any boolean
expression, but would normally include one of the rcu_read_lock_held()
family of functions and a lockdep expression. However, any boolean
expression can be used. For a moderately ornate example, consider
the following:
expression, but would normally include a lockdep expression. However,
any boolean expression can be used. For a moderately ornate example,
consider the following:
file = rcu_dereference_check(fdt->fd[fd],
rcu_read_lock_held() ||
lockdep_is_held(&files->file_lock) ||
atomic_read(&files->count) == 1);
......@@ -62,7 +78,7 @@ This expression picks up the pointer "fdt->fd[fd]" in an RCU-safe manner,
and, if CONFIG_PROVE_RCU is configured, verifies that this expression
is used in:
1. An RCU read-side critical section, or
1. An RCU read-side critical section (implicit), or
2. with files->file_lock held, or
3. on an unshared files_struct.
......
Documentation/RCU/torture.txt
浏览文件 @ d6363844
......@@ -42,7 +42,7 @@ fqs_holdoff Holdoff time (in microseconds) between consecutive calls
fqs_stutter Wait time (in seconds) between consecutive bursts
of calls to force_quiescent_state().
irqreaders Says to invoke RCU readers from irq level. This is currently
irqreader Says to invoke RCU readers from irq level. This is currently
done via timers. Defaults to "1" for variants of RCU that
permit this. (Or, more accurately, variants of RCU that do
-not- permit this know to ignore this variable.)
......@@ -79,19 +79,68 @@ stutter The length of time to run the test before pausing for this
Specifying "stutter=0" causes the test to run continuously
without pausing, which is the old default behavior.
test_boost Whether or not to test the ability of RCU to do priority
boosting. Defaults to "test_boost=1", which performs
RCU priority-inversion testing only if the selected
RCU implementation supports priority boosting. Specifying
"test_boost=0" never performs RCU priority-inversion
testing. Specifying "test_boost=2" performs RCU
priority-inversion testing even if the selected RCU
implementation does not support RCU priority boosting,
which can be used to test rcutorture's ability to
carry out RCU priority-inversion testing.
test_boost_interval
The number of seconds in an RCU priority-inversion test
cycle. Defaults to "test_boost_interval=7". It is
usually wise for this value to be relatively prime to
the value selected for "stutter".
test_boost_duration
The number of seconds to do RCU priority-inversion testing
within any given "test_boost_interval". Defaults to
"test_boost_duration=4".
test_no_idle_hz Whether or not to test the ability of RCU to operate in
a kernel that disables the scheduling-clock interrupt to
idle CPUs. Boolean parameter, "1" to test, "0" otherwise.
Defaults to omitting this test.
torture_type The type of RCU to test: "rcu" for the rcu_read_lock() API,
"rcu_sync" for rcu_read_lock() with synchronous reclamation,
"rcu_bh" for the rcu_read_lock_bh() API, "rcu_bh_sync" for
rcu_read_lock_bh() with synchronous reclamation, "srcu" for
the "srcu_read_lock()" API, "sched" for the use of
preempt_disable() together with synchronize_sched(),
and "sched_expedited" for the use of preempt_disable()
with synchronize_sched_expedited().
torture_type The type of RCU to test, with string values as follows:
"rcu": rcu_read_lock(), rcu_read_unlock() and call_rcu().
"rcu_sync": rcu_read_lock(), rcu_read_unlock(), and
synchronize_rcu().
"rcu_expedited": rcu_read_lock(), rcu_read_unlock(), and
synchronize_rcu_expedited().
"rcu_bh": rcu_read_lock_bh(), rcu_read_unlock_bh(), and
call_rcu_bh().
"rcu_bh_sync": rcu_read_lock_bh(), rcu_read_unlock_bh(),
and synchronize_rcu_bh().
"rcu_bh_expedited": rcu_read_lock_bh(), rcu_read_unlock_bh(),
and synchronize_rcu_bh_expedited().
"srcu": srcu_read_lock(), srcu_read_unlock() and
synchronize_srcu().
"srcu_expedited": srcu_read_lock(), srcu_read_unlock() and
synchronize_srcu_expedited().
"sched": preempt_disable(), preempt_enable(), and
call_rcu_sched().
"sched_sync": preempt_disable(), preempt_enable(), and
synchronize_sched().
"sched_expedited": preempt_disable(), preempt_enable(), and
synchronize_sched_expedited().
Defaults to "rcu".
verbose Enable debug printk()s. Default is disabled.
......@@ -100,12 +149,12 @@ OUTPUT
The statistics output is as follows:
rcu-torture: --- Start of test: nreaders=16 stat_interval=0 verbose=0
rcu-torture: rtc: 0000000000000000 ver: 1916 tfle: 0 rta: 1916 rtaf: 0 rtf: 1915
rcu-torture: Reader Pipe: 1466408 9747 0 0 0 0 0 0 0 0 0
rcu-torture: Reader Batch: 1464477 11678 0 0 0 0 0 0 0 0
rcu-torture: Free-Block Circulation: 1915 1915 1915 1915 1915 1915 1915 1915 1915 1915 0
rcu-torture: --- End of test
rcu-torture:--- Start of test: nreaders=16 nfakewriters=4 stat_interval=30 verbose=0 test_no_idle_hz=1 shuffle_interval=3 stutter=5 irqreader=1 fqs_duration=0 fqs_holdoff=0 fqs_stutter=3 test_boost=1/0 test_boost_interval=7 test_boost_duration=4
rcu-torture: rtc: (null) ver: 155441 tfle: 0 rta: 155441 rtaf: 8884 rtf: 155440 rtmbe: 0 rtbke: 0 rtbre: 0 rtbf: 0 rtb: 0 nt: 3055767
rcu-torture: Reader Pipe: 727860534 34213 0 0 0 0 0 0 0 0 0
rcu-torture: Reader Batch: 727877838 17003 0 0 0 0 0 0 0 0 0
rcu-torture: Free-Block Circulation: 155440 155440 155440 155440 155440 155440 155440 155440 155440 155440 0
rcu-torture:--- End of test: SUCCESS: nreaders=16 nfakewriters=4 stat_interval=30 verbose=0 test_no_idle_hz=1 shuffle_interval=3 stutter=5 irqreader=1 fqs_duration=0 fqs_holdoff=0 fqs_stutter=3 test_boost=1/0 test_boost_interval=7 test_boost_duration=4
The command "dmesg | grep torture:" will extract this information on
most systems. On more esoteric configurations, it may be necessary to
......@@ -113,26 +162,55 @@ use other commands to access the output of the printk()s used by
the RCU torture test. The printk()s use KERN_ALERT, so they should
be evident. ;-)
The first and last lines show the rcutorture module parameters, and the
last line shows either "SUCCESS" or "FAILURE", based on rcutorture's
automatic determination as to whether RCU operated correctly.
The entries are as follows:
o "rtc": The hexadecimal address of the structure currently visible
to readers.
o "ver": The number of times since boot that the rcutw writer task
o "ver": The number of times since boot that the RCU writer task
has changed the structure visible to readers.
o "tfle": If non-zero, indicates that the "torture freelist"
containing structure to be placed into the "rtc" area is empty.
containing structures to be placed into the "rtc" area is empty.
This condition is important, since it can fool you into thinking
that RCU is working when it is not. :-/
o "rta": Number of structures allocated from the torture freelist.
o "rtaf": Number of allocations from the torture freelist that have
failed due to the list being empty.
failed due to the list being empty. It is not unusual for this
to be non-zero, but it is bad for it to be a large fraction of
the value indicated by "rta".
o "rtf": Number of frees into the torture freelist.
o "rtmbe": A non-zero value indicates that rcutorture believes that
rcu_assign_pointer() and rcu_dereference() are not working
correctly. This value should be zero.
o "rtbke": rcutorture was unable to create the real-time kthreads
used to force RCU priority inversion. This value should be zero.
o "rtbre": Although rcutorture successfully created the kthreads
used to force RCU priority inversion, it was unable to set them
to the real-time priority level of 1. This value should be zero.
o "rtbf": The number of times that RCU priority boosting failed
to resolve RCU priority inversion.
o "rtb": The number of times that rcutorture attempted to force
an RCU priority inversion condition. If you are testing RCU
priority boosting via the "test_boost" module parameter, this
value should be non-zero.
o "nt": The number of times rcutorture ran RCU read-side code from
within a timer handler. This value should be non-zero only
if you specified the "irqreader" module parameter.
o "Reader Pipe": Histogram of "ages" of structures seen by readers.
If any entries past the first two are non-zero, RCU is broken.
And rcutorture prints the error flag string "!!!" to make sure
......@@ -162,26 +240,15 @@ o "Free-Block Circulation": Shows the number of torture structures
somehow gets incremented farther than it should.
Different implementations of RCU can provide implementation-specific
additional information. For example, SRCU provides the following:
additional information. For example, SRCU provides the following
additional line:
srcu-torture: rtc: f8cf46a8 ver: 355 tfle: 0 rta: 356 rtaf: 0 rtf: 346 rtmbe: 0
srcu-torture: Reader Pipe: 559738 939 0 0 0 0 0 0 0 0 0
srcu-torture: Reader Batch: 560434 243 0 0 0 0 0 0 0 0
srcu-torture: Free-Block Circulation: 355 354 353 352 351 350 349 348 347 346 0
srcu-torture: per-CPU(idx=1): 0(0,1) 1(0,1) 2(0,0) 3(0,1)
The first four lines are similar to those for RCU. The last line shows
the per-CPU counter state. The numbers in parentheses are the values
of the "old" and "current" counters for the corresponding CPU. The
"idx" value maps the "old" and "current" values to the underlying array,
and is useful for debugging.
Similarly, sched_expedited RCU provides the following:
sched_expedited-torture: rtc: d0000000016c1880 ver: 1090796 tfle: 0 rta: 1090796 rtaf: 0 rtf: 1090787 rtmbe: 0 nt: 27713319
sched_expedited-torture: Reader Pipe: 12660320201 95875 0 0 0 0 0 0 0 0 0
sched_expedited-torture: Reader Batch: 12660424885 0 0 0 0 0 0 0 0 0 0
sched_expedited-torture: Free-Block Circulation: 1090795 1090795 1090794 1090793 1090792 1090791 1090790 1090789 1090788 1090787 0
This line shows the per-CPU counter state. The numbers in parentheses are
the values of the "old" and "current" counters for the corresponding CPU.
The "idx" value maps the "old" and "current" values to the underlying
array, and is useful for debugging.
USAGE
......
Documentation/RCU/trace.txt
浏览文件 @ d6363844
......@@ -33,23 +33,23 @@ rcu/rcuboost:
The output of "cat rcu/rcudata" looks as follows:
rcu_sched:
0 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=545/1/0 df=50 of=0 ri=0 ql=163 qs=NRW. kt=0/W/0 ktl=ebc3 b=10 ci=153737 co=0 ca=0
1 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=967/1/0 df=58 of=0 ri=0 ql=634 qs=NRW. kt=0/W/1 ktl=58c b=10 ci=191037 co=0 ca=0
2 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=1081/1/0 df=175 of=0 ri=0 ql=74 qs=N.W. kt=0/W/2 ktl=da94 b=10 ci=75991 co=0 ca=0
3 c=20942 g=20943 pq=1 pqc=20942 qp=1 dt=1846/0/0 df=404 of=0 ri=0 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=72261 co=0 ca=0
4 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=369/1/0 df=83 of=0 ri=0 ql=48 qs=N.W. kt=0/W/4 ktl=e0e7 b=10 ci=128365 co=0 ca=0
5 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=381/1/0 df=64 of=0 ri=0 ql=169 qs=NRW. kt=0/W/5 ktl=fb2f b=10 ci=164360 co=0 ca=0
6 c=20972 g=20973 pq=1 pqc=20972 qp=0 dt=1037/1/0 df=183 of=0 ri=0 ql=62 qs=N.W. kt=0/W/6 ktl=d2ad b=10 ci=65663 co=0 ca=0
7 c=20897 g=20897 pq=1 pqc=20896 qp=0 dt=1572/0/0 df=382 of=0 ri=0 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=75006 co=0 ca=0
0 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=545/1/0 df=50 of=0 ri=0 ql=163 qs=NRW. kt=0/W/0 ktl=ebc3 b=10 ci=153737 co=0 ca=0
1 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=967/1/0 df=58 of=0 ri=0 ql=634 qs=NRW. kt=0/W/1 ktl=58c b=10 ci=191037 co=0 ca=0
2 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=1081/1/0 df=175 of=0 ri=0 ql=74 qs=N.W. kt=0/W/2 ktl=da94 b=10 ci=75991 co=0 ca=0
3 c=20942 g=20943 pq=1 pgp=20942 qp=1 dt=1846/0/0 df=404 of=0 ri=0 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=72261 co=0 ca=0
4 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=369/1/0 df=83 of=0 ri=0 ql=48 qs=N.W. kt=0/W/4 ktl=e0e7 b=10 ci=128365 co=0 ca=0
5 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=381/1/0 df=64 of=0 ri=0 ql=169 qs=NRW. kt=0/W/5 ktl=fb2f b=10 ci=164360 co=0 ca=0
6 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=1037/1/0 df=183 of=0 ri=0 ql=62 qs=N.W. kt=0/W/6 ktl=d2ad b=10 ci=65663 co=0 ca=0
7 c=20897 g=20897 pq=1 pgp=20896 qp=0 dt=1572/0/0 df=382 of=0 ri=0 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=75006 co=0 ca=0
rcu_bh:
0 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=545/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/0 ktl=ebc3 b=10 ci=0 co=0 ca=0
1 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=967/1/0 df=3 of=0 ri=1 ql=0 qs=.... kt=0/W/1 ktl=58c b=10 ci=151 co=0 ca=0
2 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=1081/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/2 ktl=da94 b=10 ci=0 co=0 ca=0
3 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=1846/0/0 df=8 of=0 ri=1 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=0 co=0 ca=0
4 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=369/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/4 ktl=e0e7 b=10 ci=0 co=0 ca=0
5 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=381/1/0 df=4 of=0 ri=1 ql=0 qs=.... kt=0/W/5 ktl=fb2f b=10 ci=0 co=0 ca=0
6 c=1480 g=1480 pq=1 pqc=1479 qp=0 dt=1037/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/6 ktl=d2ad b=10 ci=0 co=0 ca=0
7 c=1474 g=1474 pq=1 pqc=1473 qp=0 dt=1572/0/0 df=8 of=0 ri=1 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=0 co=0 ca=0
0 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=545/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/0 ktl=ebc3 b=10 ci=0 co=0 ca=0
1 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=967/1/0 df=3 of=0 ri=1 ql=0 qs=.... kt=0/W/1 ktl=58c b=10 ci=151 co=0 ca=0
2 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1081/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/2 ktl=da94 b=10 ci=0 co=0 ca=0
3 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1846/0/0 df=8 of=0 ri=1 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=0 co=0 ca=0
4 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=369/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/4 ktl=e0e7 b=10 ci=0 co=0 ca=0
5 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=381/1/0 df=4 of=0 ri=1 ql=0 qs=.... kt=0/W/5 ktl=fb2f b=10 ci=0 co=0 ca=0
6 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1037/1/0 df=6 of=0 ri=1 ql=0 qs=.... kt=0/W/6 ktl=d2ad b=10 ci=0 co=0 ca=0
7 c=1474 g=1474 pq=1 pgp=1473 qp=0 dt=1572/0/0 df=8 of=0 ri=1 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=0 co=0 ca=0
The first section lists the rcu_data structures for rcu_sched, the second
for rcu_bh. Note that CONFIG_TREE_PREEMPT_RCU kernels will have an
......@@ -84,7 +84,7 @@ o "pq" indicates that this CPU has passed through a quiescent state
CPU has not yet reported that fact, (2) some other CPU has not
yet reported for this grace period, or (3) both.
o "pqc" indicates which grace period the last-observed quiescent
o "pgp" indicates which grace period the last-observed quiescent
state for this CPU corresponds to. This is important for handling
the race between CPU 0 reporting an extended dynticks-idle
quiescent state for CPU 1 and CPU 1 suddenly waking up and
......@@ -184,10 +184,14 @@ o "kt" is the per-CPU kernel-thread state. The digit preceding
The number after the final slash is the CPU that the kthread
is actually running on.
This field is displayed only for CONFIG_RCU_BOOST kernels.
o "ktl" is the low-order 16 bits (in hexadecimal) of the count of
the number of times that this CPU's per-CPU kthread has gone
through its loop servicing invoke_rcu_cpu_kthread() requests.
This field is displayed only for CONFIG_RCU_BOOST kernels.
o "b" is the batch limit for this CPU. If more than this number
of RCU callbacks is ready to invoke, then the remainder will
be deferred.
......
Documentation/blackfin/bfin-gpio-notes.txt
浏览文件 @ d6363844
/*
* File: Documentation/blackfin/bfin-gpio-note.txt
* File: Documentation/blackfin/bfin-gpio-notes.txt
* Based on:
* Author:
*
......
Documentation/block/biodoc.txt
浏览文件 @ d6363844
......@@ -186,7 +186,7 @@ a virtual address mapping (unlike the earlier scheme of virtual address
do not have a corresponding kernel virtual address space mapping) and
low-memory pages.
Note: Please refer to Documentation/PCI/PCI-DMA-mapping.txt for a discussion
Note: Please refer to Documentation/DMA-API-HOWTO.txt for a discussion
on PCI high mem DMA aspects and mapping of scatter gather lists, and support
for 64 bit PCI.
......
Documentation/bus-virt-phys-mapping.txt
浏览文件 @ d6363844
[ NOTE: The virt_to_bus() and bus_to_virt() functions have been
superseded by the functionality provided by the PCI DMA interface
(see Documentation/PCI/PCI-DMA-mapping.txt). They continue
(see Documentation/DMA-API-HOWTO.txt). They continue
to be documented below for historical purposes, but new code
must not use them. --davidm 00/12/12 ]
......
Documentation/cdrom/packet-writing.txt
浏览文件 @ d6363844
......@@ -109,7 +109,7 @@ this interface. (see http://tom.ist-im-web.de/download/pktcdvd )
For a description of the sysfs interface look into the file:
Documentation/ABI/testing/sysfs-block-pktcdvd
Documentation/ABI/testing/sysfs-class-pktcdvd
Using the pktcdvd debugfs interface
......
Documentation/cgroups/memory.txt
浏览文件 @ d6363844
......@@ -380,7 +380,7 @@ will be charged as a new owner of it.
5.2 stat file
5.2.1 memory.stat file includes following statistics
memory.stat file includes following statistics
# per-memory cgroup local status
cache - # of bytes of page cache memory.
......@@ -418,7 +418,6 @@ total_unevictable - sum of all children's "unevictable"
# The following additional stats are dependent on CONFIG_DEBUG_VM.
inactive_ratio - VM internal parameter. (see mm/page_alloc.c)
recent_rotated_anon - VM internal parameter. (see mm/vmscan.c)
recent_rotated_file - VM internal parameter. (see mm/vmscan.c)
recent_scanned_anon - VM internal parameter. (see mm/vmscan.c)
......@@ -438,89 +437,6 @@ Note:
file_mapped is accounted only when the memory cgroup is owner of page
cache.)
5.2.2 memory.vmscan_stat
memory.vmscan_stat includes statistics information for memory scanning and
freeing, reclaiming. The statistics shows memory scanning information since
memory cgroup creation and can be reset to 0 by writing 0 as
#echo 0 > ../memory.vmscan_stat
This file contains following statistics.
[param]_[file_or_anon]_pages_by_[reason]_[under_heararchy]
[param]_elapsed_ns_by_[reason]_[under_hierarchy]
For example,
scanned_file_pages_by_limit indicates the number of scanned
file pages at vmscan.
Now, 3 parameters are supported
scanned - the number of pages scanned by vmscan
rotated - the number of pages activated at vmscan
freed - the number of pages freed by vmscan
If "rotated" is high against scanned/freed, the memcg seems busy.
Now, 2 reason are supported
limit - the memory cgroup's limit
system - global memory pressure + softlimit
(global memory pressure not under softlimit is not handled now)
When under_hierarchy is added in the tail, the number indicates the
total memcg scan of its children and itself.
elapsed_ns is a elapsed time in nanosecond. This may include sleep time
and not indicates CPU usage. So, please take this as just showing
latency.
Here is an example.
# cat /cgroup/memory/A/memory.vmscan_stat
scanned_pages_by_limit 9471864
scanned_anon_pages_by_limit 6640629
scanned_file_pages_by_limit 2831235
rotated_pages_by_limit 4243974
rotated_anon_pages_by_limit 3971968
rotated_file_pages_by_limit 272006
freed_pages_by_limit 2318492
freed_anon_pages_by_limit 962052
freed_file_pages_by_limit 1356440
elapsed_ns_by_limit 351386416101
scanned_pages_by_system 0
scanned_anon_pages_by_system 0
scanned_file_pages_by_system 0
rotated_pages_by_system 0
rotated_anon_pages_by_system 0
rotated_file_pages_by_system 0
freed_pages_by_system 0
freed_anon_pages_by_system 0
freed_file_pages_by_system 0
elapsed_ns_by_system 0
scanned_pages_by_limit_under_hierarchy 9471864
scanned_anon_pages_by_limit_under_hierarchy 6640629
scanned_file_pages_by_limit_under_hierarchy 2831235
rotated_pages_by_limit_under_hierarchy 4243974
rotated_anon_pages_by_limit_under_hierarchy 3971968
rotated_file_pages_by_limit_under_hierarchy 272006
freed_pages_by_limit_under_hierarchy 2318492
freed_anon_pages_by_limit_under_hierarchy 962052
freed_file_pages_by_limit_under_hierarchy 1356440
elapsed_ns_by_limit_under_hierarchy 351386416101
scanned_pages_by_system_under_hierarchy 0
scanned_anon_pages_by_system_under_hierarchy 0
scanned_file_pages_by_system_under_hierarchy 0
rotated_pages_by_system_under_hierarchy 0
rotated_anon_pages_by_system_under_hierarchy 0
rotated_file_pages_by_system_under_hierarchy 0
freed_pages_by_system_under_hierarchy 0
freed_anon_pages_by_system_under_hierarchy 0
freed_file_pages_by_system_under_hierarchy 0
elapsed_ns_by_system_under_hierarchy 0
5.3 swappiness
Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only.
......
Documentation/cpu-freq/governors.txt
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......@@ -132,7 +132,7 @@ The sampling rate is limited by the HW transition latency:
transition_latency * 100
Or by kernel restrictions:
If CONFIG_NO_HZ is set, the limit is 10ms fixed.
If CONFIG_NO_HZ is not set or no_hz=off boot parameter is used, the
If CONFIG_NO_HZ is not set or nohz=off boot parameter is used, the
limits depend on the CONFIG_HZ option:
HZ=1000: min=20000us (20ms)
HZ=250: min=80000us (80ms)
......
Documentation/development-process/4.Coding
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......@@ -278,7 +278,7 @@ enabled, a configurable percentage of memory allocations will be made to
fail; these failures can be restricted to a specific range of code.
Running with fault injection enabled allows the programmer to see how the
code responds when things go badly. See
Documentation/fault-injection/fault-injection.text for more information on
Documentation/fault-injection/fault-injection.txt for more information on
how to use this facility.
Other kinds of errors can be found with the "sparse" static analysis tool.
......
Documentation/device-mapper/dm-log.txt
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......@@ -48,7 +48,7 @@ kernel and userspace, 'connector' is used as the interface for
communication.
There are currently two userspace log implementations that leverage this
framework - "clustered_disk" and "clustered_core". These implementations
framework - "clustered-disk" and "clustered-core". These implementations
provide a cluster-coherent log for shared-storage. Device-mapper mirroring
can be used in a shared-storage environment when the cluster log implementations
are employed.
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Introduction
============
The more-sophisticated device-mapper targets require complex metadata
that is managed in kernel. In late 2010 we were seeing that various
different targets were rolling their own data strutures, for example:
- Mikulas Patocka's multisnap implementation
- Heinz Mauelshagen's thin provisioning target
- Another btree-based caching target posted to dm-devel
- Another multi-snapshot target based on a design of Daniel Phillips
Maintaining these data structures takes a lot of work, so if possible
we'd like to reduce the number.
The persistent-data library is an attempt to provide a re-usable
framework for people who want to store metadata in device-mapper
targets. It's currently used by the thin-provisioning target and an
upcoming hierarchical storage target.
Overview
========
The main documentation is in the header files which can all be found
under drivers/md/persistent-data.
The block manager
-----------------
dm-block-manager.[hc]
This provides access to the data on disk in fixed sized-blocks. There
is a read/write locking interface to prevent concurrent accesses, and
keep data that is being used in the cache.
Clients of persistent-data are unlikely to use this directly.
The transaction manager
-----------------------
dm-transaction-manager.[hc]
This restricts access to blocks and enforces copy-on-write semantics.
The only way you can get hold of a writable block through the
transaction manager is by shadowing an existing block (ie. doing
copy-on-write) or allocating a fresh one. Shadowing is elided within
the same transaction so performance is reasonable. The commit method
ensures that all data is flushed before it writes the superblock.
On power failure your metadata will be as it was when last committed.
The Space Maps
--------------
dm-space-map.h
dm-space-map-metadata.[hc]
dm-space-map-disk.[hc]
On-disk data structures that keep track of reference counts of blocks.
Also acts as the allocator of new blocks. Currently two
implementations: a simpler one for managing blocks on a different
device (eg. thinly-provisioned data blocks); and one for managing
the metadata space. The latter is complicated by the need to store
its own data within the space it's managing.
The data structures
-------------------
dm-btree.[hc]
dm-btree-remove.c
dm-btree-spine.c
dm-btree-internal.h
Currently there is only one data structure, a hierarchical btree.
There are plans to add more. For example, something with an
array-like interface would see a lot of use.
The btree is 'hierarchical' in that you can define it to be composed
of nested btrees, and take multiple keys. For example, the
thin-provisioning target uses a btree with two levels of nesting.
The first maps a device id to a mapping tree, and that in turn maps a
virtual block to a physical block.
Values stored in the btrees can have arbitrary size. Keys are always
64bits, although nesting allows you to use multiple keys.
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Introduction
============
This document descibes a collection of device-mapper targets that
between them implement thin-provisioning and snapshots.
The main highlight of this implementation, compared to the previous
implementation of snapshots, is that it allows many virtual devices to
be stored on the same data volume. This simplifies administration and
allows the sharing of data between volumes, thus reducing disk usage.
Another significant feature is support for an arbitrary depth of
recursive snapshots (snapshots of snapshots of snapshots ...). The
previous implementation of snapshots did this by chaining together
lookup tables, and so performance was O(depth). This new
implementation uses a single data structure to avoid this degradation
with depth. Fragmentation may still be an issue, however, in some
scenarios.
Metadata is stored on a separate device from data, giving the
administrator some freedom, for example to:
- Improve metadata resilience by storing metadata on a mirrored volume
but data on a non-mirrored one.
- Improve performance by storing the metadata on SSD.
Status
======
These targets are very much still in the EXPERIMENTAL state. Please
do not yet rely on them in production. But do experiment and offer us
feedback. Different use cases will have different performance
characteristics, for example due to fragmentation of the data volume.
If you find this software is not performing as expected please mail
dm-devel@redhat.com with details and we'll try our best to improve
things for you.
Userspace tools for checking and repairing the metadata are under
development.
Cookbook
========
This section describes some quick recipes for using thin provisioning.
They use the dmsetup program to control the device-mapper driver
directly. End users will be advised to use a higher-level volume
manager such as LVM2 once support has been added.
Pool device
-----------
The pool device ties together the metadata volume and the data volume.
It maps I/O linearly to the data volume and updates the metadata via
two mechanisms:
- Function calls from the thin targets
- Device-mapper 'messages' from userspace which control the creation of new
virtual devices amongst other things.
Setting up a fresh pool device
------------------------------
Setting up a pool device requires a valid metadata device, and a
data device. If you do not have an existing metadata device you can
make one by zeroing the first 4k to indicate empty metadata.
dd if=/dev/zero of=$metadata_dev bs=4096 count=1
The amount of metadata you need will vary according to how many blocks
are shared between thin devices (i.e. through snapshots). If you have
less sharing than average you'll need a larger-than-average metadata device.
As a guide, we suggest you calculate the number of bytes to use in the
metadata device as 48 * $data_dev_size / $data_block_size but round it up
to 2MB if the answer is smaller. The largest size supported is 16GB.
If you're creating large numbers of snapshots which are recording large
amounts of change, you may need find you need to increase this.
Reloading a pool table
----------------------
You may reload a pool's table, indeed this is how the pool is resized
if it runs out of space. (N.B. While specifying a different metadata
device when reloading is not forbidden at the moment, things will go
wrong if it does not route I/O to exactly the same on-disk location as
previously.)
Using an existing pool device
-----------------------------
dmsetup create pool \
--table "0 20971520 thin-pool $metadata_dev $data_dev \
$data_block_size $low_water_mark"
$data_block_size gives the smallest unit of disk space that can be
allocated at a time expressed in units of 512-byte sectors. People
primarily interested in thin provisioning may want to use a value such
as 1024 (512KB). People doing lots of snapshotting may want a smaller value
such as 128 (64KB). If you are not zeroing newly-allocated data,
a larger $data_block_size in the region of 256000 (128MB) is suggested.
$data_block_size must be the same for the lifetime of the
metadata device.
$low_water_mark is expressed in blocks of size $data_block_size. If
free space on the data device drops below this level then a dm event
will be triggered which a userspace daemon should catch allowing it to
extend the pool device. Only one such event will be sent.
Resuming a device with a new table itself triggers an event so the
userspace daemon can use this to detect a situation where a new table
already exceeds the threshold.
Thin provisioning
-----------------
i) Creating a new thinly-provisioned volume.
To create a new thinly- provisioned volume you must send a message to an
active pool device, /dev/mapper/pool in this example.
dmsetup message /dev/mapper/pool 0 "create_thin 0"
Here '0' is an identifier for the volume, a 24-bit number. It's up
to the caller to allocate and manage these identifiers. If the
identifier is already in use, the message will fail with -EEXIST.
ii) Using a thinly-provisioned volume.
Thinly-provisioned volumes are activated using the 'thin' target:
dmsetup create thin --table "0 2097152 thin /dev/mapper/pool 0"
The last parameter is the identifier for the thinp device.
Internal snapshots
------------------
i) Creating an internal snapshot.
Snapshots are created with another message to the pool.
N.B. If the origin device that you wish to snapshot is active, you
must suspend it before creating the snapshot to avoid corruption.
This is NOT enforced at the moment, so please be careful!
dmsetup suspend /dev/mapper/thin
dmsetup message /dev/mapper/pool 0 "create_snap 1 0"
dmsetup resume /dev/mapper/thin
Here '1' is the identifier for the volume, a 24-bit number. '0' is the
identifier for the origin device.
ii) Using an internal snapshot.
Once created, the user doesn't have to worry about any connection
between the origin and the snapshot. Indeed the snapshot is no
different from any other thinly-provisioned device and can be
snapshotted itself via the same method. It's perfectly legal to
have only one of them active, and there's no ordering requirement on
activating or removing them both. (This differs from conventional
device-mapper snapshots.)
Activate it exactly the same way as any other thinly-provisioned volume:
dmsetup create snap --table "0 2097152 thin /dev/mapper/pool 1"
Deactivation
------------
All devices using a pool must be deactivated before the pool itself
can be.
dmsetup remove thin
dmsetup remove snap
dmsetup remove pool
Reference
=========
'thin-pool' target
------------------
i) Constructor
thin-pool <metadata dev> <data dev> <data block size (sectors)> \
<low water mark (blocks)> [<number of feature args> [<arg>]*]
Optional feature arguments:
- 'skip_block_zeroing': skips the zeroing of newly-provisioned blocks.
Data block size must be between 64KB (128 sectors) and 1GB
(2097152 sectors) inclusive.
ii) Status
<transaction id> <used metadata blocks>/<total metadata blocks>
<used data blocks>/<total data blocks> <held metadata root>
transaction id:
A 64-bit number used by userspace to help synchronise with metadata
from volume managers.
used data blocks / total data blocks
If the number of free blocks drops below the pool's low water mark a
dm event will be sent to userspace. This event is edge-triggered and
it will occur only once after each resume so volume manager writers
should register for the event and then check the target's status.
held metadata root:
The location, in sectors, of the metadata root that has been
'held' for userspace read access. '-' indicates there is no
held root. This feature is not yet implemented so '-' is
always returned.
iii) Messages
create_thin <dev id>
Create a new thinly-provisioned device.
<dev id> is an arbitrary unique 24-bit identifier chosen by
the caller.
create_snap <dev id> <origin id>
Create a new snapshot of another thinly-provisioned device.
<dev id> is an arbitrary unique 24-bit identifier chosen by
the caller.
<origin id> is the identifier of the thinly-provisioned device
of which the new device will be a snapshot.
delete <dev id>
Deletes a thin device. Irreversible.
trim <dev id> <new size in sectors>
Delete mappings from the end of a thin device. Irreversible.
You might want to use this if you're reducing the size of
your thinly-provisioned device. In many cases, due to the
sharing of blocks between devices, it is not possible to
determine in advance how much space 'trim' will release. (In
future a userspace tool might be able to perform this
calculation.)
set_transaction_id <current id> <new id>
Userland volume managers, such as LVM, need a way to
synchronise their external metadata with the internal metadata of the
pool target. The thin-pool target offers to store an
arbitrary 64-bit transaction id and return it on the target's
status line. To avoid races you must provide what you think
the current transaction id is when you change it with this
compare-and-swap message.
'thin' target
-------------
i) Constructor
thin <pool dev> <dev id>
pool dev:
the thin-pool device, e.g. /dev/mapper/my_pool or 253:0
dev id:
the internal device identifier of the device to be
activated.
The pool doesn't store any size against the thin devices. If you
load a thin target that is smaller than you've been using previously,
then you'll have no access to blocks mapped beyond the end. If you
load a target that is bigger than before, then extra blocks will be
provisioned as and when needed.
If you wish to reduce the size of your thin device and potentially
regain some space then send the 'trim' message to the pool.
ii) Status
<nr mapped sectors> <highest mapped sector>
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Calxeda Highbank Platforms Device Tree Bindings
-----------------------------------------------
Boards with Calxeda Cortex-A9 based Highbank SOC shall have the following
properties.
Required root node properties:
- compatible = "calxeda,highbank";
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Freescale i.MX Platforms Device Tree Bindings
-----------------------------------------------
i.MX51 Babbage Board
Required root node properties:
- compatible = "fsl,imx51-babbage", "fsl,imx51";
i.MX53 Automotive Reference Design Board
Required root node properties:
- compatible = "fsl,imx53-ard", "fsl,imx53";
i.MX53 Evaluation Kit
Required root node properties:
- compatible = "fsl,imx53-evk", "fsl,imx53";
i.MX53 Quick Start Board
Required root node properties:
- compatible = "fsl,imx53-qsb", "fsl,imx53";
i.MX53 Smart Mobile Reference Design Board
Required root node properties:
- compatible = "fsl,imx53-smd", "fsl,imx53";
i.MX6 Quad SABRE Automotive Board
Required root node properties:
- compatible = "fsl,imx6q-sabreauto", "fsl,imx6q";
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* ARM Generic Interrupt Controller
ARM SMP cores are often associated with a GIC, providing per processor
interrupts (PPI), shared processor interrupts (SPI) and software
generated interrupts (SGI).
Primary GIC is attached directly to the CPU and typically has PPIs and SGIs.
Secondary GICs are cascaded into the upward interrupt controller and do not
have PPIs or SGIs.
Main node required properties:
- compatible : should be one of:
"arm,cortex-a9-gic"
"arm,arm11mp-gic"
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Specifies the number of cells needed to encode an
interrupt source. The type shall be a <u32> and the value shall be 3.
The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
interrupts.
The 2nd cell contains the interrupt number for the interrupt type.
SPI interrupts are in the range [0-987]. PPI interrupts are in the
range [0-15].
The 3rd cell is the flags, encoded as follows:
bits[3:0] trigger type and level flags.
1 = low-to-high edge triggered
2 = high-to-low edge triggered
4 = active high level-sensitive
8 = active low level-sensitive
bits[15:8] PPI interrupt cpu mask. Each bit corresponds to each of
the 8 possible cpus attached to the GIC. A bit set to '1' indicated
the interrupt is wired to that CPU. Only valid for PPI interrupts.
- reg : Specifies base physical address(s) and size of the GIC registers. The
first region is the GIC distributor register base and size. The 2nd region is
the GIC cpu interface register base and size.
Optional
- interrupts : Interrupt source of the parent interrupt controller. Only
present on secondary GICs.
Example:
intc: interrupt-controller@fff11000 {
compatible = "arm,cortex-a9-gic";
#interrupt-cells = <3>;
#address-cells = <1>;
interrupt-controller;
reg = <0xfff11000 0x1000>,
<0xfff10100 0x100>;
};
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* ARM L2 Cache Controller
ARM cores often have a separate level 2 cache controller. There are various
implementations of the L2 cache controller with compatible programming models.
The ARM L2 cache representation in the device tree should be done as follows:
Required properties:
- compatible : should be one of:
"arm,pl310-cache"
"arm,l220-cache"
"arm,l210-cache"
- cache-unified : Specifies the cache is a unified cache.
- cache-level : Should be set to 2 for a level 2 cache.
- reg : Physical base address and size of cache controller's memory mapped
registers.
Optional properties:
- arm,data-latency : Cycles of latency for Data RAM accesses. Specifies 3 cells of
read, write and setup latencies. Minimum valid values are 1. Controllers
without setup latency control should use a value of 0.
- arm,tag-latency : Cycles of latency for Tag RAM accesses. Specifies 3 cells of
read, write and setup latencies. Controllers without setup latency control
should use 0. Controllers without separate read and write Tag RAM latency
values should only use the first cell.
- arm,dirty-latency : Cycles of latency for Dirty RAMs. This is a single cell.
- arm,filter-ranges : <start length> Starting address and length of window to
filter. Addresses in the filter window are directed to the M1 port. Other
addresses will go to the M0 port.
- interrupts : 1 combined interrupt.
Example:
L2: cache-controller {
compatible = "arm,pl310-cache";
reg = <0xfff12000 0x1000>;
arm,data-latency = <1 1 1>;
arm,tag-latency = <2 2 2>;
arm,filter-latency = <0x80000000 0x8000000>;
cache-unified;
cache-level = <2>;
interrupts = <45>;
};
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* TI - DSP (Digital Signal Processor)
TI DSP included in OMAP SoC
Required properties:
- compatible : Should be "ti,omap3-c64" for OMAP3 & 4
- ti,hwmods: "dsp"
Examples:
dsp {
compatible = "ti,omap3-c64";
ti,hwmods = "dsp";
};
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* TI - IVA (Imaging and Video Accelerator) subsystem
The IVA contain various audio, video or imaging HW accelerator
depending of the version.
Required properties:
- compatible : Should be:
- "ti,ivahd" for OMAP4
- "ti,iva2.2" for OMAP3
- "ti,iva2.1" for OMAP2430
- "ti,iva1" for OMAP2420
- ti,hwmods: "iva"
Examples:
iva {
compatible = "ti,ivahd", "ti,iva";
ti,hwmods = "iva";
};
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* TI - L3 Network On Chip (NoC)
This version is an implementation of the generic NoC IP
provided by Arteris.
Required properties:
- compatible : Should be "ti,omap3-l3-smx" for OMAP3 family
Should be "ti,omap4-l3-noc" for OMAP4 family
- ti,hwmods: "l3_main_1", ... One hwmod for each noc domain.
Examples:
ocp {
compatible = "ti,omap4-l3-noc", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges;
ti,hwmods = "l3_main_1", "l3_main_2", "l3_main_3";
};
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* TI - MPU (Main Processor Unit) subsystem
The MPU subsystem contain one or several ARM cores
depending of the version.
The MPU contain CPUs, GIC, L2 cache and a local PRCM.
Required properties:
- compatible : Should be "ti,omap3-mpu" for OMAP3
Should be "ti,omap4-mpu" for OMAP4
- ti,hwmods: "mpu"
Examples:
- For an OMAP4 SMP system:
mpu {
compatible = "ti,omap4-mpu";
ti,hwmods = "mpu";
};
- For an OMAP3 monocore system:
mpu {
compatible = "ti,omap3-mpu";
ti,hwmods = "mpu";
};
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* Texas Instruments OMAP
OMAP is currently using a static file per SoC family to describe the
IPs present in the SoC.
On top of that an omap_device is created to extend the platform_device
capabilities and to allow binding with one or several hwmods.
The hwmods will contain all the information to build the device:
adresse range, irq lines, dma lines, interconnect, PRCM register,
clock domain, input clocks.
For the moment just point to the existing hwmod, the next step will be
to move data from hwmod to device-tree representation.
Required properties:
- compatible: Every devices present in OMAP SoC should be in the
form: "ti,XXX"
- ti,hwmods: list of hwmod names (ascii strings), that comes from the OMAP
HW documentation, attached to a device. Must contain at least
one hwmod.
Optional properties:
- ti,no_idle_on_suspend: When present, it prevents the PM to idle the module
during suspend.
Example:
spinlock@1 {
compatible = "ti,omap4-spinlock";
ti,hwmods = "spinlock";
};
Boards:
- OMAP3 BeagleBoard : Low cost community board
compatible = "ti,omap3-beagle", "ti,omap3"
- OMAP4 SDP : Software Developement Board
compatible = "ti,omap4-sdp", "ti,omap4430"
- OMAP4 PandaBoard : Low cost community board
compatible = "ti,omap4-panda", "ti,omap4430"
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Picochip picoXcell device tree bindings.
========================================
Required root node properties:
- compatible:
- "picochip,pc7302-pc3x3" : PC7302 development board with PC3X3 device.
- "picochip,pc7302-pc3x2" : PC7302 development board with PC3X2 device.
- "picochip,pc3x3" : picoXcell PC3X3 device based board.
- "picochip,pc3x2" : picoXcell PC3X2 device based board.
Timers required properties:
- compatible = "picochip,pc3x2-timer"
- interrupts : The single IRQ line for the timer.
- clock-freq : The frequency in HZ of the timer.
- reg : The register bank for the timer.
Note: two timers are required - one for the scheduler clock and one for the
event tick/NOHZ.
VIC required properties:
- compatible = "arm,pl192-vic".
- interrupt-controller.
- reg : The register bank for the device.
- #interrupt-cells : Must be 1.
Documentation/devicetree/bindings/arm/primecell.txt
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......@@ -6,7 +6,9 @@ driver matching.
Required properties:
- compatible : should be a specific value for peripheral and "arm,primecell"
- compatible : should be a specific name for the peripheral and
"arm,primecell". The specific name will match the ARM
engineering name for the logic block in the form: "arm,pl???"
Optional properties:
......
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Picochip picoXcell SPAcc (Security Protocol Accelerator) bindings
Picochip picoXcell devices contain crypto offload engines that may be used for
IPSEC and femtocell layer 2 ciphering.
Required properties:
- compatible : "picochip,spacc-ipsec" for the IPSEC offload engine
"picochip,spacc-l2" for the femtocell layer 2 ciphering engine.
- reg : Offset and length of the register set for this device
- interrupt-parent : The interrupt controller that controls the SPAcc
interrupt.
- interrupts : The interrupt line from the SPAcc.
- ref-clock : The input clock that drives the SPAcc.
Example SPAcc node:
spacc@10000 {
compatible = "picochip,spacc-ipsec";
reg = <0x100000 0x10000>;
interrupt-parent = <&vic0>;
interrupts = <24>;
ref-clock = <&ipsec_clk>, "ref";
};
Documentation/devicetree/bindings/gpio/led.txt
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......@@ -8,7 +8,7 @@ node's name represents the name of the corresponding LED.
LED sub-node properties:
- gpios : Should specify the LED's GPIO, see "Specifying GPIO information
for devices" in Documentation/powerpc/booting-without-of.txt. Active
for devices" in Documentation/devicetree/booting-without-of.txt. Active
low LEDs should be indicated using flags in the GPIO specifier.
- label : (optional) The label for this LED. If omitted, the label is
taken from the node name (excluding the unit address).
......
Documentation/devicetree/bindings/gpio/pl061-gpio.txt 0 → 100644
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ARM PL061 GPIO controller
Required properties:
- compatible : "arm,pl061", "arm,primecell"
- #gpio-cells : Should be two. The first cell is the pin number and the
second cell is used to specify optional parameters:
- bit 0 specifies polarity (0 for normal, 1 for inverted)
- gpio-controller : Marks the device node as a GPIO controller.
- interrupts : Interrupt mapping for GPIO IRQ.
Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt 0 → 100644
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* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
Required properties:
- compatible : Should be "fsl,<chip>-i2c"
- reg : Should contain I2C/HS-I2C registers location and length
- interrupts : Should contain I2C/HS-I2C interrupt
Optional properties:
- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
The absence of the propoerty indicates the default frequency 100 kHz.
Examples:
i2c@83fc4000 { /* I2C2 on i.MX51 */
compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
reg = <0x83fc4000 0x4000>;
interrupts = <63>;
};
i2c@70038000 { /* HS-I2C on i.MX51 */
compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
reg = <0x70038000 0x4000>;
interrupts = <64>;
clock-frequency = <400000>;
};
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* Samsung's I2C controller
The Samsung's I2C controller is used to interface with I2C devices.
Required properties:
- compatible: value should be either of the following.
(a) "samsung, s3c2410-i2c", for i2c compatible with s3c2410 i2c.
(b) "samsung, s3c2440-i2c", for i2c compatible with s3c2440 i2c.
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: interrupt number to the cpu.
- samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges.
- gpios: The order of the gpios should be the following: <SDA, SCL>.
The gpio specifier depends on the gpio controller.
Optional properties:
- samsung,i2c-slave-addr: Slave address in multi-master enviroment. If not
specified, default value is 0.
- samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not
specified, the default value in Hz is 100000.
Example:
i2c@13870000 {
compatible = "samsung,s3c2440-i2c";
reg = <0x13870000 0x100>;
interrupts = <345>;
samsung,i2c-sda-delay = <100>;
samsung,i2c-max-bus-freq = <100000>;
gpios = <&gpd1 2 0 /* SDA */
&gpd1 3 0 /* SCL */>;
#address-cells = <1>;
#size-cells = <0>;
wm8994@1a {
compatible = "wlf,wm8994";
reg = <0x1a>;
};
};
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* NVIDIA Tegra Secure Digital Host Controller
This controller on Tegra family SoCs provides an interface for MMC, SD,
and SDIO types of memory cards.
Required properties:
- compatible : Should be "nvidia,<chip>-sdhci"
- reg : Should contain SD/MMC registers location and length
- interrupts : Should contain SD/MMC interrupt
Optional properties:
- cd-gpios : Specify GPIOs for card detection
- wp-gpios : Specify GPIOs for write protection
- power-gpios : Specify GPIOs for power control
- support-8bit : Boolean, indicates if 8-bit mode should be used.
Example:
sdhci@c8000200 {
compatible = "nvidia,tegra20-sdhci";
reg = <0xc8000200 0x200>;
interrupts = <47>;
cd-gpios = <&gpio 69 0>; /* gpio PI5 */
wp-gpios = <&gpio 57 0>; /* gpio PH1 */
power-gpios = <&gpio 155 0>; /* gpio PT3 */
support-8bit;
};
Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
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CAN Device Tree Bindings
------------------------
2011 Freescale Semiconductor, Inc.
Flexcan CAN contoller on Freescale's ARM and PowerPC system-on-a-chip (SOC).
fsl,flexcan-v1.0 nodes
-----------------------
In addition to the required compatible-, reg- and interrupt-properties, you can
also specify which clock source shall be used for the controller.
Required properties:
CPI Clock- Can Protocol Interface Clock
This CLK_SRC bit of CTRL(control register) selects the clock source to
the CAN Protocol Interface(CPI) to be either the peripheral clock
(driven by the PLL) or the crystal oscillator clock. The selected clock
is the one fed to the prescaler to generate the Serial Clock (Sclock).
The PRESDIV field of CTRL(control register) controls a prescaler that
generates the Serial Clock (Sclock), whose period defines the
time quantum used to compose the CAN waveform.
- compatible : Should be "fsl,<processor>-flexcan"
Can Engine Clock Source
There are two sources for CAN clock
- Platform Clock It represents the bus clock
- Oscillator Clock
An implementation should also claim any of the following compatibles
that it is fully backwards compatible with:
Peripheral Clock (PLL)
--------------
|
--------- -------------
| |CPI Clock | Prescaler | Sclock
| |---------------->| (1.. 256) |------------>
--------- -------------
| |
-------------- ---------------------CLK_SRC
Oscillator Clock
- fsl,p1010-flexcan
- fsl,flexcan-clock-source : CAN Engine Clock Source.This property selects
the peripheral clock. PLL clock is fed to the
prescaler to generate the Serial Clock (Sclock).
Valid values are "oscillator" and "platform"
"oscillator": CAN engine clock source is oscillator clock.
"platform" The CAN engine clock source is the bus clock
(platform clock).
- reg : Offset and length of the register set for this device
- interrupts : Interrupt tuple for this device
- clock-frequency : The oscillator frequency driving the flexcan device
- fsl,flexcan-clock-divider : for the reference and system clock, an additional
clock divider can be specified.
- clock-frequency: frequency required to calculate the bitrate for FlexCAN.
Example:
Note:
- v1.0 of flexcan-v1.0 represent the IP block version for P1010 SOC.
- P1010 does not have oscillator as the Clock Source.So the default
Clock Source is platform clock.
Examples:
can0@1c000 {
compatible = "fsl,flexcan-v1.0";
can@1c000 {
compatible = "fsl,p1010-flexcan";
reg = <0x1c000 0x1000>;
interrupts = <48 0x2>;
interrupt-parent = <&mpic>;
fsl,flexcan-clock-source = "platform";
fsl,flexcan-clock-divider = <2>;
clock-frequency = <fixed by u-boot>;
clock-frequency = <200000000>; // filled in by bootloader
};
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* Smart Mixed-Signal Connectivity (SMSC) LAN911x/912x Controller
Required properties:
- compatible : Should be "smsc,lan<model>", "smsc,lan9115"
- reg : Address and length of the io space for SMSC LAN
- interrupts : Should contain SMSC LAN interrupt line
- interrupt-parent : Should be the phandle for the interrupt controller
that services interrupts for this device
- phy-mode : String, operation mode of the PHY interface.
Supported values are: "mii", "gmii", "sgmii", "tbi", "rmii",
"rgmii", "rgmii-id", "rgmii-rxid", "rgmii-txid", "rtbi", "smii".
Optional properties:
- reg-shift : Specify the quantity to shift the register offsets by
- reg-io-width : Specify the size (in bytes) of the IO accesses that
should be performed on the device. Valid value for SMSC LAN is
2 or 4. If it's omitted or invalid, the size would be 2.
- smsc,irq-active-high : Indicates the IRQ polarity is active-high
- smsc,irq-push-pull : Indicates the IRQ type is push-pull
- smsc,force-internal-phy : Forces SMSC LAN controller to use
internal PHY
- smsc,force-external-phy : Forces SMSC LAN controller to use
external PHY
- smsc,save-mac-address : Indicates that mac address needs to be saved
before resetting the controller
- local-mac-address : 6 bytes, mac address
Examples:
lan9220@f4000000 {
compatible = "smsc,lan9220", "smsc,lan9115";
reg = <0xf4000000 0x2000000>;
phy-mode = "mii";
interrupt-parent = <&gpio1>;
interrupts = <31>;
reg-io-width = <4>;
smsc,irq-push-pull;
};
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NVIDIA Tegra 2 pinmux controller
Required properties:
- compatible : "nvidia,tegra20-pinmux"
Documentation/devicetree/bindings/serial/rs485.txt 0 → 100644
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* RS485 serial communications
The RTS signal is capable of automatically controlling line direction for
the built-in half-duplex mode.
The properties described hereafter shall be given to a half-duplex capable
UART node.
Required properties:
- rs485-rts-delay: prop-encoded-array <a b> where:
* a is the delay beteween rts signal and beginning of data sent in milliseconds.
it corresponds to the delay before sending data.
* b is the delay between end of data sent and rts signal in milliseconds
it corresponds to the delay after sending data and actual release of the line.
Optional properties:
- linux,rs485-enabled-at-boot-time: empty property telling to enable the rs485
feature at boot time. It can be disabled later with proper ioctl.
- rs485-rx-during-tx: empty property that enables the receiving of data even
whilst sending data.
RS485 example for Atmel USART:
usart0: serial@fff8c000 {
compatible = "atmel,at91sam9260-usart";
reg = <0xfff8c000 0x4000>;
interrupts = <7>;
atmel,use-dma-rx;
atmel,use-dma-tx;
linux,rs485-enabled-at-boot-time;
rs485-rts-delay = <0 200>; // in milliseconds
};
Documentation/devicetree/bindings/sound/soc/codecs/fsl-sgtl5000.txt 0 → 100644
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* Freescale SGTL5000 Stereo Codec
Required properties:
- compatible : "fsl,sgtl5000".
Example:
codec: sgtl5000@0a {
compatible = "fsl,sgtl5000";
reg = <0x0a>;
};
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WM8510 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8510"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8510@1a {
compatible = "wlf,wm8510";
reg = <0x1a>;
};
Documentation/devicetree/bindings/sound/wm8523.txt 0 → 100644
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WM8523 audio CODEC
This device supports I2C only.
Required properties:
- compatible : "wlf,wm8523"
- reg : the I2C address of the device.
Example:
codec: wm8523@1a {
compatible = "wlf,wm8523";
reg = <0x1a>;
};
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WM8580 audio CODEC
This device supports I2C only.
Required properties:
- compatible : "wlf,wm8580"
- reg : the I2C address of the device.
Example:
codec: wm8580@1a {
compatible = "wlf,wm8580";
reg = <0x1a>;
};
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WM8711 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8711"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8711@1a {
compatible = "wlf,wm8711";
reg = <0x1a>;
};
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WM8728 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8728"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8728@1a {
compatible = "wlf,wm8728";
reg = <0x1a>;
};
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WM8731 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8731"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8731@1a {
compatible = "wlf,wm8731";
reg = <0x1a>;
};
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WM8737 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8737"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8737@1a {
compatible = "wlf,wm8737";
reg = <0x1a>;
};
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WM8741 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8741"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8741@1a {
compatible = "wlf,wm8741";
reg = <0x1a>;
};
Documentation/devicetree/bindings/sound/wm8750.txt 0 → 100644
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WM8750 and WM8987 audio CODECs
These devices support both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8750" or "wlf,wm8987"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8750@1a {
compatible = "wlf,wm8750";
reg = <0x1a>;
};
Documentation/devicetree/bindings/sound/wm8753.txt 0 → 100644
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WM8753 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8753"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8737@1a {
compatible = "wlf,wm8753";
reg = <0x1a>;
};
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WM8770 audio CODEC
This device supports SPI.
Required properties:
- compatible : "wlf,wm8770"
- reg : the chip select number.
Example:
codec: wm8770@1 {
compatible = "wlf,wm8770";
reg = <1>;
};
Documentation/devicetree/bindings/sound/wm8776.txt 0 → 100644
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WM8776 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8776"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8776@1a {
compatible = "wlf,wm8776";
reg = <0x1a>;
};
Documentation/devicetree/bindings/sound/wm8804.txt 0 → 100644
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WM8804 audio CODEC
This device supports both I2C and SPI (configured with pin strapping
on the board).
Required properties:
- compatible : "wlf,wm8804"
- reg : the I2C address of the device for I2C, the chip select
number for SPI.
Example:
codec: wm8804@1a {
compatible = "wlf,wm8804";
reg = <0x1a>;
};
Documentation/devicetree/bindings/spi/spi_pl022.txt 0 → 100644
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ARM PL022 SPI controller
Required properties:
- compatible : "arm,pl022", "arm,primecell"
- reg : Offset and length of the register set for the device
- interrupts : Should contain SPI controller interrupt
Optional properties:
- cs-gpios : should specify GPIOs used for chipselects.
The gpios will be referred to as reg = <index> in the SPI child nodes.
If unspecified, a single SPI device without a chip select can be used.
Documentation/devicetree/bindings/tty/serial/atmel-usart.txt 0 → 100644
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* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
Required properties:
- compatible: Should be "atmel,<chip>-usart"
The compatible <chip> indicated will be the first SoC to support an
additional mode or an USART new feature.
- reg: Should contain registers location and length
- interrupts: Should contain interrupt
Optional properties:
- atmel,use-dma-rx: use of PDC or DMA for receiving data
- atmel,use-dma-tx: use of PDC or DMA for transmitting data
<chip> compatible description:
- at91rm9200: legacy USART support
- at91sam9260: generic USART implementation for SAM9 SoCs
Example:
usart0: serial@fff8c000 {
compatible = "atmel,at91sam9260-usart";
reg = <0xfff8c000 0x4000>;
interrupts = <7>;
atmel,use-dma-rx;
atmel,use-dma-tx;
};
Documentation/devicetree/bindings/tty/serial/msm_serial.txt 0 → 100644
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* Qualcomm MSM UART
Required properties:
- compatible :
- "qcom,msm-uart", and one of "qcom,msm-hsuart" or
"qcom,msm-lsuart".
- reg : offset and length of the register set for the device
for the hsuart operating in compatible mode, there should be a
second pair describing the gsbi registers.
- interrupts : should contain the uart interrupt.
There are two different UART blocks used in MSM devices,
"qcom,msm-hsuart" and "qcom,msm-lsuart". The msm-serial driver is
able to handle both of these, and matches against the "qcom,msm-uart"
as the compatibility.
The registers for the "qcom,msm-hsuart" device need to specify both
register blocks, even for the common driver.
Example:
uart@19c400000 {
compatible = "qcom,msm-hsuart", "qcom,msm-uart";
reg = <0x19c40000 0x1000>,
<0x19c00000 0x1000>;
interrupts = <195>;
};
Documentation/devicetree/bindings/tty/serial/snps-dw-apb-uart.txt 0 → 100644
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* Synopsys DesignWare ABP UART
Required properties:
- compatible : "snps,dw-apb-uart"
- reg : offset and length of the register set for the device.
- interrupts : should contain uart interrupt.
- clock-frequency : the input clock frequency for the UART.
Optional properties:
- reg-shift : quantity to shift the register offsets by. If this property is
not present then the register offsets are not shifted.
- reg-io-width : the size (in bytes) of the IO accesses that should be
performed on the device. If this property is not present then single byte
accesses are used.
Example:
uart@80230000 {
compatible = "snps,dw-apb-uart";
reg = <0x80230000 0x100>;
clock-frequency = <3686400>;
interrupts = <10>;
reg-shift = <2>;
reg-io-width = <4>;
};
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Device tree binding vendor prefix registry. Keep list in alphabetical order.
This isn't an exhaustive list, but you should add new prefixes to it before
using them to avoid name-space collisions.
adi Analog Devices, Inc.
amcc Applied Micro Circuits Corporation (APM, formally AMCC)
apm Applied Micro Circuits Corporation (APM)
arm ARM Ltd.
atmel Atmel Corporation
chrp Common Hardware Reference Platform
dallas Maxim Integrated Products (formerly Dallas Semiconductor)
denx Denx Software Engineering
epson Seiko Epson Corp.
est ESTeem Wireless Modems
fsl Freescale Semiconductor
GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc.
gef GE Fanuc Intelligent Platforms Embedded Systems, Inc.
hp Hewlett Packard
ibm International Business Machines (IBM)
idt Integrated Device Technologies, Inc.
intercontrol Inter Control Group
linux Linux-specific binding
marvell Marvell Technology Group Ltd.
maxim Maxim Integrated Products
mosaixtech Mosaix Technologies, Inc.
national National Semiconductor
nintendo Nintendo
nvidia NVIDIA
nxp NXP Semiconductors
powervr Imagination Technologies
qcom Qualcomm, Inc.
ramtron Ramtron International
samsung Samsung Semiconductor
schindler Schindler
simtek
sirf SiRF Technology, Inc.
stericsson ST-Ericsson
ti Texas Instruments
xlnx Xilinx
Documentation/devicetree/bindings/virtio/mmio.txt 0 → 100644
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* virtio memory mapped device
See http://ozlabs.org/~rusty/virtio-spec/ for more details.
Required properties:
- compatible: "virtio,mmio" compatibility string
- reg: control registers base address and size including configuration space
- interrupts: interrupt generated by the device
Example:
virtio_block@3000 {
compatible = "virtio,mmio";
reg = <0x3000 0x100>;
interrupts = <41>;
}
Documentation/driver-model/binding.txt
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......@@ -48,10 +48,6 @@ devclass_add_device is called to enumerate the device within the class
and actually register it with the class, which happens with the
class's register_dev callback.
NOTE: The device class structures and core routines to manipulate them
are not in the mainline kernel, so the discussion is still a bit
speculative.
Driver
~~~~~~
......
Documentation/driver-model/device.txt
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......@@ -45,33 +45,52 @@ struct device_attribute {
const char *buf, size_t count);
};
Attributes of devices can be exported via drivers using a simple
procfs-like interface.
Attributes of devices can be exported by a device driver through sysfs.
Please see Documentation/filesystems/sysfs.txt for more information
on how sysfs works.
As explained in Documentation/kobject.txt, device attributes must be be
created before the KOBJ_ADD uevent is generated. The only way to realize
that is by defining an attribute group.
Attributes are declared using a macro called DEVICE_ATTR:
#define DEVICE_ATTR(name,mode,show,store)
Example:
DEVICE_ATTR(power,0644,show_power,store_power);
static DEVICE_ATTR(type, 0444, show_type, NULL);
static DEVICE_ATTR(power, 0644, show_power, store_power);
This declares a structure of type struct device_attribute named
'dev_attr_power'. This can then be added and removed to the device's
directory using:
This declares two structures of type struct device_attribute with respective
names 'dev_attr_type' and 'dev_attr_power'. These two attributes can be
organized as follows into a group:
int device_create_file(struct device *device, struct device_attribute * entry);
void device_remove_file(struct device * dev, struct device_attribute * attr);
static struct attribute *dev_attrs[] = {
&dev_attr_type.attr,
&dev_attr_power.attr,
NULL,
};
Example:
static struct attribute_group dev_attr_group = {
.attrs = dev_attrs,
};
static const struct attribute_group *dev_attr_groups[] = {
&dev_attr_group,
NULL,
};
This array of groups can then be associated with a device by setting the
group pointer in struct device before device_register() is invoked:
device_create_file(dev,&dev_attr_power);
device_remove_file(dev,&dev_attr_power);
dev->groups = dev_attr_groups;
device_register(dev);
The file name will be 'power' with a mode of 0644 (-rw-r--r--).
The device_register() function will use the 'groups' pointer to create the
device attributes and the device_unregister() function will use this pointer
to remove the device attributes.
Word of warning: While the kernel allows device_create_file() and
device_remove_file() to be called on a device at any time, userspace has
......@@ -84,24 +103,4 @@ not know about the new attributes.
This is important for device driver that need to publish additional
attributes for a device at driver probe time. If the device driver simply
calls device_create_file() on the device structure passed to it, then
userspace will never be notified of the new attributes. Instead, it should
probably use class_create() and class->dev_attrs to set up a list of
desired attributes in the modules_init function, and then in the .probe()
hook, and then use device_create() to create a new device as a child
of the probed device. The new device will generate a new uevent and
properly advertise the new attributes to userspace.
For example, if a driver wanted to add the following attributes:
struct device_attribute mydriver_attribs[] = {
__ATTR(port_count, 0444, port_count_show),
__ATTR(serial_number, 0444, serial_number_show),
NULL
};
Then in the module init function is would do:
mydriver_class = class_create(THIS_MODULE, "my_attrs");
mydriver_class.dev_attr = mydriver_attribs;
And assuming 'dev' is the struct device passed into the probe hook, the driver
probe function would do something like:
device_create(&mydriver_class, dev, chrdev, &private_data, "my_name");
userspace will never be notified of the new attributes.
Documentation/dvb/get_dvb_firmware
浏览文件 @ d6363844
......@@ -27,7 +27,8 @@ use IO::Handle;
"or51211", "or51132_qam", "or51132_vsb", "bluebird",
"opera1", "cx231xx", "cx18", "cx23885", "pvrusb2", "mpc718",
"af9015", "ngene", "az6027", "lme2510_lg", "lme2510c_s7395",
"lme2510c_s7395_old", "drxk", "drxk_terratec_h5");
"lme2510c_s7395_old", "drxk", "drxk_terratec_h5", "tda10071",
"it9135" );
# Check args
syntax() if (scalar(@ARGV) != 1);
......@@ -575,19 +576,10 @@ sub ngene {
}
sub az6027{
my $file = "AZ6027_Linux_Driver.tar.gz";
my $url = "http://linux.terratec.de/files/$file";
my $firmware = "dvb-usb-az6027-03.fw";
my $url = "http://linux.terratec.de/files/TERRATEC_S7/$firmware";
wgetfile($file, $url);
#untar
if( system("tar xzvf $file $firmware")){
die "failed to untar firmware";
}
if( system("rm $file")){
die ("unable to remove unnecessary files");
}
wgetfile($firmware, $url);
$firmware;
}
......@@ -665,6 +657,41 @@ sub drxk_terratec_h5 {
"$fwfile"
}
sub it9135 {
my $url = "http://kworld.server261.com/kworld/CD/ITE_TiVme/V1.00/";
my $zipfile = "Driver_V10.323.1.0412.100412.zip";
my $hash = "79b597dc648698ed6820845c0c9d0d37";
my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 0);
my $drvfile = "Driver_V10.323.1.0412.100412/Data/x86/IT9135BDA.sys";
my $fwfile = "dvb-usb-it9137-01.fw";
checkstandard();
wgetfile($zipfile, $url . $zipfile);
verify($zipfile, $hash);
unzip($zipfile, $tmpdir);
extract("$tmpdir/$drvfile", 69632, 5731, "$fwfile");
"$fwfile"
}
sub tda10071 {
my $sourcefile = "PCTV_460e_reference.zip";
my $url = "ftp://ftp.pctvsystems.com/TV/driver/PCTV%2070e%2080e%20100e%20320e%20330e%20800e/";
my $hash = "4403de903bf2593464c8d74bbc200a57";
my $fwfile = "dvb-fe-tda10071.fw";
my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);
checkstandard();
wgetfile($sourcefile, $url . $sourcefile);
verify($sourcefile, $hash);
unzip($sourcefile, $tmpdir);
extract("$tmpdir/PCTV\ 70e\ 80e\ 100e\ 320e\ 330e\ 800e/32\ bit/emOEM.sys", 0x67d38, 40504, $fwfile);
"$fwfile";
}
# ---------------------------------------------------------------
# Utilities
......
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浏览文件 @ d6363844
To extract firmware for Kworld UB499-2T (id 1b80:e409) you need to copy the
following file(s) to this directory.
IT9135BDA.sys Dated Mon 22 Mar 2010 02:20:08 GMT
extract using dd
dd if=IT9135BDA.sys ibs=1 skip=69632 count=5731 of=dvb-usb-it9137-01.fw
copy to default firmware location.
Documentation/fault-injection/fault-injection.txt
浏览文件 @ d6363844
......@@ -21,6 +21,11 @@ o fail_make_request
/sys/block/<device>/make-it-fail or
/sys/block/<device>/<partition>/make-it-fail. (generic_make_request())
o fail_mmc_request
injects MMC data errors on devices permitted by setting
debugfs entries under /sys/kernel/debug/mmc0/fail_mmc_request
Configure fault-injection capabilities behavior
-----------------------------------------------
......@@ -115,7 +120,8 @@ use the boot option:
failslab=
fail_page_alloc=
fail_make_request=<interval>,<probability>,<space>,<times>
fail_make_request=
mmc_core.fail_request=<interval>,<probability>,<space>,<times>
How to add new fault injection capability
-----------------------------------------
......
Documentation/fb/udlfb.txt
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......@@ -87,23 +87,38 @@ Special configuration for udlfb is usually unnecessary. There are a few
options, however.
From the command line, pass options to modprobe
modprobe udlfb defio=1 console=1
modprobe udlfb fb_defio=0 console=1 shadow=1
Or for permanent option, create file like /etc/modprobe.d/options with text
options udlfb defio=1 console=1
Or modify options on the fly at /sys/module/udlfb/parameters directory via
sudo nano fb_defio
change the parameter in place, and save the file.
Accepted options:
Unplug/replug USB device to apply with new settings
Or for permanent option, create file like /etc/modprobe.d/udlfb.conf with text
options udlfb fb_defio=0 console=1 shadow=1
Accepted boolean options:
fb_defio Make use of the fb_defio (CONFIG_FB_DEFERRED_IO) kernel
module to track changed areas of the framebuffer by page faults.
Standard fbdev applications that use mmap but that do not
report damage, may be able to work with this enabled.
Disabled by default because of overhead and other issues.
console Allow fbcon to attach to udlfb provided framebuffers. This
is disabled by default because fbcon will aggressively consume
the first framebuffer it finds, which isn't usually what the
user wants in the case of USB displays.
Standard fbdev applications that use mmap but that do not
report damage, should be able to work with this enabled.
Disable when running with X server that supports reporting
changed regions via ioctl, as this method is simpler,
more stable, and higher performance.
default: fb_defio=1
console Allow fbcon to attach to udlfb provided framebuffers.
Can be disabled if fbcon and other clients
(e.g. X with --shared-vt) are in conflict.
default: console=1
shadow Allocate a 2nd framebuffer to shadow what's currently across
the USB bus in device memory. If any pixels are unchanged,
do not transmit. Spends host memory to save USB transfers.
Enabled by default. Only disable on very low memory systems.
default: shadow=1
Sysfs Attributes
================
......
Documentation/feature-removal-schedule.txt
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......@@ -133,41 +133,6 @@ Who: Pavel Machek <pavel@ucw.cz>
---------------------------
What: sys_sysctl
When: September 2010
Option: CONFIG_SYSCTL_SYSCALL
Why: The same information is available in a more convenient from
/proc/sys, and none of the sysctl variables appear to be
important performance wise.
Binary sysctls are a long standing source of subtle kernel
bugs and security issues.
When I looked several months ago all I could find after
searching several distributions were 5 user space programs and
glibc (which falls back to /proc/sys) using this syscall.
The man page for sysctl(2) documents it as unusable for user
space programs.
sysctl(2) is not generally ABI compatible to a 32bit user
space application on a 64bit and a 32bit kernel.
For the last several months the policy has been no new binary
sysctls and no one has put forward an argument to use them.
Binary sysctls issues seem to keep happening appearing so
properly deprecating them (with a warning to user space) and a
2 year grace warning period will mean eventually we can kill
them and end the pain.
In the mean time individual binary sysctls can be dealt with
in a piecewise fashion.
Who: Eric Biederman <ebiederm@xmission.com>
---------------------------
What: /proc/<pid>/oom_adj
When: August 2012
Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's
......@@ -495,29 +460,6 @@ Who: Jean Delvare <khali@linux-fr.org>
----------------------------
What: Support for UVCIOC_CTRL_ADD in the uvcvideo driver
When: 3.2
Why: The information passed to the driver by this ioctl is now queried
dynamically from the device.
Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
----------------------------
What: Support for UVCIOC_CTRL_MAP_OLD in the uvcvideo driver
When: 3.2
Why: Used only by applications compiled against older driver versions.
Superseded by UVCIOC_CTRL_MAP which supports V4L2 menu controls.
Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
----------------------------
What: Support for UVCIOC_CTRL_GET and UVCIOC_CTRL_SET in the uvcvideo driver
When: 3.2
Why: Superseded by the UVCIOC_CTRL_QUERY ioctl.
Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
----------------------------
What: Support for driver specific ioctls in the pwc driver (everything
defined in media/pwc-ioctl.h)
When: 3.3
......@@ -592,3 +534,20 @@ Why: In 3.0, we can now autodetect internal 3G device and already have
interface that was used by acer-wmi driver. It will replaced by
information log when acer-wmi initial.
Who: Lee, Chun-Yi <jlee@novell.com>
----------------------------
What: The XFS nodelaylog mount option
When: 3.3
Why: The delaylog mode that has been the default since 2.6.39 has proven
stable, and the old code is in the way of additional improvements in
the log code.
Who: Christoph Hellwig <hch@lst.de>
----------------------------
What: iwlagn alias support
When: 3.5
Why: The iwlagn module has been renamed iwlwifi. The alias will be around
for backward compatibility for several cycles and then dropped.
Who: Don Fry <donald.h.fry@intel.com>
Documentation/filesystems/9p.txt
浏览文件 @ d6363844
......@@ -92,7 +92,7 @@ OPTIONS
wfdno=n the file descriptor for writing with trans=fd
maxdata=n the number of bytes to use for 9p packet payload (msize)
msize=n the number of bytes to use for 9p packet payload
port=n port to connect to on the remote server
......
Documentation/filesystems/Locking
浏览文件 @ d6363844
......@@ -29,6 +29,7 @@ d_hash no no no maybe
d_compare: yes no no maybe
d_delete: no yes no no
d_release: no no yes no
d_prune: no yes no no
d_iput: no no yes no
d_dname: no no no no
d_automount: no no yes no
......
Documentation/filesystems/caching/object.txt
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......@@ -127,9 +127,9 @@ fscache_enqueue_object()).
PROVISION OF CPU TIME
---------------------
The work to be done by the various states is given CPU time by the threads of
the slow work facility (see Documentation/slow-work.txt). This is used in
preference to the workqueue facility because:
The work to be done by the various states was given CPU time by the threads of
the slow work facility. This was used in preference to the workqueue facility
because:
(1) Threads may be completely occupied for very long periods of time by a
particular work item. These state actions may be doing sequences of
......
Documentation/filesystems/ext3.txt
浏览文件 @ d6363844
......@@ -73,14 +73,6 @@ nobarrier (*) This also requires an IO stack which can support
also be used to enable or disable barriers, for
consistency with other ext3 mount options.
orlov (*) This enables the new Orlov block allocator. It is
enabled by default.
oldalloc This disables the Orlov block allocator and enables
the old block allocator. Orlov should have better
performance - we'd like to get some feedback if it's
the contrary for you.
user_xattr Enables Extended User Attributes. Additionally, you
need to have extended attribute support enabled in the
kernel configuration (CONFIG_EXT3_FS_XATTR). See the
......
Documentation/filesystems/ext4.txt
浏览文件 @ d6363844
......@@ -160,7 +160,9 @@ noload if the filesystem was not unmounted cleanly,
lead to any number of problems.
data=journal All data are committed into the journal prior to being
written into the main file system.
written into the main file system. Enabling
this mode will disable delayed allocation and
O_DIRECT support.
data=ordered (*) All data are forced directly out to the main file
system prior to its metadata being committed to the
......@@ -201,30 +203,19 @@ inode_readahead_blks=n This tuning parameter controls the maximum
table readahead algorithm will pre-read into
the buffer cache. The default value is 32 blocks.
orlov (*) This enables the new Orlov block allocator. It is
enabled by default.
oldalloc This disables the Orlov block allocator and enables
the old block allocator. Orlov should have better
performance - we'd like to get some feedback if it's
the contrary for you.
user_xattr Enables Extended User Attributes. Additionally, you
need to have extended attribute support enabled in the
kernel configuration (CONFIG_EXT4_FS_XATTR). See the
attr(5) manual page and http://acl.bestbits.at/ to
learn more about extended attributes.
nouser_xattr Disables Extended User Attributes.
acl Enables POSIX Access Control Lists support.
Additionally, you need to have ACL support enabled in
the kernel configuration (CONFIG_EXT4_FS_POSIX_ACL).
See the acl(5) manual page and http://acl.bestbits.at/
for more information.
nouser_xattr Disables Extended User Attributes. If you have extended
attribute support enabled in the kernel configuration
(CONFIG_EXT4_FS_XATTR), extended attribute support
is enabled by default on mount. See the attr(5) manual
page and http://acl.bestbits.at/ for more information
about extended attributes.
noacl This option disables POSIX Access Control List
support.
support. If ACL support is enabled in the kernel
configuration (CONFIG_EXT4_FS_POSIX_ACL), ACL is
enabled by default on mount. See the acl(5) manual
page and http://acl.bestbits.at/ for more information
about acl.
bsddf (*) Make 'df' act like BSD.
minixdf Make 'df' act like Minix.
......@@ -419,8 +410,8 @@ written to the journal first, and then to its final location.
In the event of a crash, the journal can be replayed, bringing both data and
metadata into a consistent state. This mode is the slowest except when data
needs to be read from and written to disk at the same time where it
outperforms all others modes. Currently ext4 does not have delayed
allocation support if this data journalling mode is selected.
outperforms all others modes. Enabling this mode will disable delayed
allocation and O_DIRECT support.
/proc entries
=============
......
Documentation/filesystems/locks.txt
浏览文件 @ d6363844
......@@ -53,11 +53,12 @@ fcntl(), with all the problems that implies.
1.3 Mandatory Locking As A Mount Option
---------------------------------------
Mandatory locking, as described in 'Documentation/filesystems/mandatory.txt'
was prior to this release a general configuration option that was valid for
all mounted filesystems. This had a number of inherent dangers, not the
least of which was the ability to freeze an NFS server by asking it to read
a file for which a mandatory lock existed.
Mandatory locking, as described in
'Documentation/filesystems/mandatory-locking.txt' was prior to this release a
general configuration option that was valid for all mounted filesystems. This
had a number of inherent dangers, not the least of which was the ability to
freeze an NFS server by asking it to read a file for which a mandatory lock
existed.
From this release of the kernel, mandatory locking can be turned on and off
on a per-filesystem basis, using the mount options 'mand' and 'nomand'.
......
Documentation/filesystems/nfs/idmapper.txt
浏览文件 @ d6363844
......@@ -47,7 +47,7 @@ request-key will find the first matching line and corresponding program. In
this case, /some/other/program will handle all uid lookups and
/usr/sbin/nfs.idmap will handle gid, user, and group lookups.
See <file:Documentation/security/keys-request-keys.txt> for more information
See <file:Documentation/security/keys-request-key.txt> for more information
about the request-key function.
......
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arch/arm/mach-imx/iomux-imx31.c
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arch/arm/mach-imx/mach-apf9328.c
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arch/arm/mach-imx/mach-bug.c
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arch/arm/mach-imx/mach-cpuimx27.c
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arch/arm/mach-imx/mach-cpuimx35.c
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arch/arm/mach-imx/mach-imx27ipcam.c
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arch/arm/mach-imx/mach-imx27lite.c
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arch/arm/mach-imx/mach-mx1ads.c
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arch/arm/mach-imx/mach-mx21ads.c
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arch/arm/mach-imx/mach-mx25_3ds.c
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arch/arm/mach-imx/mach-mx27_3ds.c
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arch/arm/mach-imx/mach-mx27ads.c
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arch/arm/mach-imx/mach-mx31ads.c
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arch/arm/mach-imx/mach-mx31lilly.c
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arch/arm/mach-imx/mach-mx31lite.c
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arch/arm/mach-imx/mach-mx35_3ds.c
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arch/arm/mach-imx/mach-mxt_td60.c
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arch/arm/mach-imx/mach-pca100.c
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arch/arm/mach-imx/mach-pcm037.c
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arch/arm/mach-imx/mach-qong.c
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arch/arm/mach-imx/mach-scb9328.c
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arch/arm/mach-imx/mach-vpr200.c
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arch/arm/mach-imx/pm-imx27.c
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arch/arm/mach-integrator/core.c
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arch/arm/mach-integrator/pci_v3.c
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arch/arm/mach-iop13xx/Makefile.boot
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arch/arm/mach-iop13xx/iq81340mc.c
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arch/arm/mach-iop13xx/iq81340sc.c
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arch/arm/mach-iop32x/Makefile.boot
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arch/arm/mach-iop32x/em7210.c
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arch/arm/mach-iop32x/glantank.c
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arch/arm/mach-iop32x/iq31244.c
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arch/arm/mach-iop32x/iq80321.c
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arch/arm/mach-iop32x/n2100.c
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arch/arm/mach-iop33x/iq80331.c
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arch/arm/mach-iop33x/iq80332.c
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arch/arm/mach-ixp2000/core.c
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arch/arm/mach-ixp2000/enp2611.c
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arch/arm/mach-ixp2000/ixdp2400.c
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arch/arm/mach-ixp23xx/roadrunner.c
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arch/arm/mach-ixp4xx/coyote-setup.c
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arch/arm/mach-ixp4xx/fsg-setup.c
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arch/arm/mach-ixp4xx/nslu2-setup.c
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arch/arm/mach-ixp4xx/vulcan-setup.c
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arch/arm/mach-omap2/io.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/io.h
浏览文件 @ d6363844
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arch/arm/mach-omap2/iommu2.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/irq.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/mcbsp.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/omap-smp.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/omap_hwmod.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/omap_l3_noc.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/omap_l3_noc.h
浏览文件 @ d6363844
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arch/arm/mach-omap2/omap_l3_smx.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/omap_l3_smx.h
浏览文件 @ d6363844
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arch/arm/mach-omap2/omap_twl.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/opp.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/pm.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/pm24xx.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/pm34xx.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/powerdomain.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/powerdomain.h
浏览文件 @ d6363844
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arch/arm/mach-omap2/prcm.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/prm2xxx_3xxx.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/prm2xxx_3xxx.h
浏览文件 @ d6363844
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arch/arm/mach-omap2/prm44xx.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/prm44xx.h
浏览文件 @ d6363844
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arch/arm/mach-omap2/sdrc.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/serial.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/smartreflex.c
浏览文件 @ d6363844
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arch/arm/mach-omap2/sr_device.c
浏览文件 @ d6363844
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