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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux 

Merge upstream tree in order to reinstate crct10dif.
This commit is contained in:
Herbert Xu 2013-09-07 12:53:35 +10:00
parent ff6f83fc9d b48a97be8e
commit eeca9fad52
4397 changed files with 249244 additions and 171906 deletions
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7
Documentation/ABI/stable/sysfs-driver-ib_srp
View File

@ -54,6 +54,13 @@ Description: Interface for making ib_srp connect to a new target.
ib_srp. Specifying a value that exceeds cmd_sg_entries is
only safe with partial memory descriptor list support enabled
(allow_ext_sg=1).
* comp_vector, a number in the range 0..n-1 specifying the
MSI-X completion vector. Some HCA's allocate multiple (n)
MSI-X vectors per HCA port. If the IRQ affinity masks of
these interrupts have been configured such that each MSI-X
interrupt is handled by a different CPU then the comp_vector
parameter can be used to spread the SRP completion workload
over multiple CPU's.
What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/ibdev
Date: January 2, 2006

10
Documentation/ABI/stable/sysfs-module
View File

@ -4,9 +4,13 @@ Description:
/sys/module/MODULENAME
The name of the module that is in the kernel. This
module name will show up either if the module is built
directly into the kernel, or if it is loaded as a
dynamic module.
module name will always show up if the module is loaded as a
dynamic module. If it is built directly into the kernel, it
will only show up if it has a version or at least one
parameter.
Note: The conditions of creation in the built-in case are not
by design and may be removed in the future.
/sys/module/MODULENAME/parameters
This directory contains individual files that are each

2
Documentation/ABI/testing/sysfs-bus-event_source-devices-events
View File

@ -29,7 +29,7 @@ Description: Generic performance monitoring events
What: /sys/devices/cpu/events/PM_1PLUS_PPC_CMPL
/sys/devices/cpu/events/PM_BRU_FIN
/sys/devices/cpu/events/PM_BRU_MPRED
/sys/devices/cpu/events/PM_BR_MPRED
/sys/devices/cpu/events/PM_CMPLU_STALL
/sys/devices/cpu/events/PM_CMPLU_STALL_BRU
/sys/devices/cpu/events/PM_CMPLU_STALL_DCACHE_MISS

79
Documentation/ABI/testing/sysfs-class-pwm Normal file
View File

@ -0,0 +1,79 @@
What: /sys/class/pwm/
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
The pwm/ class sub-directory belongs to the Generic PWM
Framework and provides a sysfs interface for using PWM
channels.
What: /sys/class/pwm/pwmchipN/
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
A /sys/class/pwm/pwmchipN directory is created for each
probed PWM controller/chip where N is the base of the
PWM chip.
What: /sys/class/pwm/pwmchipN/npwm
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
The number of PWM channels supported by the PWM chip.
What: /sys/class/pwm/pwmchipN/export
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Exports a PWM channel from the PWM chip for sysfs control.
Value is between 0 and /sys/class/pwm/pwmchipN/npwm - 1.
What: /sys/class/pwm/pwmchipN/unexport
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Unexports a PWM channel.
What: /sys/class/pwm/pwmchipN/pwmX
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
A /sys/class/pwm/pwmchipN/pwmX directory is created for
each exported PWM channel where X is the exported PWM
channel number.
What: /sys/class/pwm/pwmchipN/pwmX/period
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Sets the PWM signal period in nanoseconds.
What: /sys/class/pwm/pwmchipN/pwmX/duty_cycle
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Sets the PWM signal duty cycle in nanoseconds.
What: /sys/class/pwm/pwmchipN/pwmX/polarity
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Sets the output polarity of the PWM signal to "normal" or
"inversed".
What: /sys/class/pwm/pwmchipN/pwmX/enable
Date: May 2013
KernelVersion: 3.11
Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
Description:
Enable/disable the PWM signal.
0 is disabled
1 is enabled

14
Documentation/ABI/testing/sysfs-devices-edac
View File

@ -77,7 +77,7 @@ Description: Read/Write attribute file that controls memory scrubbing.
What: /sys/devices/system/edac/mc/mc*/max_location
Date: April 2012
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
linux-edac@vger.kernel.org
Description: This attribute file displays the information about the last
available memory slot in this memory controller. It is used by
@ -85,7 +85,7 @@ Description: This attribute file displays the information about the last
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/size
Date: April 2012
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
linux-edac@vger.kernel.org
Description: This attribute file will display the size of dimm or rank.
For dimm*/size, this is the size, in MB of the DIMM memory
@ -96,14 +96,14 @@ Description: This attribute file will display the size of dimm or rank.
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_dev_type
Date: April 2012
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
linux-edac@vger.kernel.org
Description: This attribute file will display what type of DRAM device is
being utilized on this DIMM (x1, x2, x4, x8, ...).
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_edac_mode
Date: April 2012
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
linux-edac@vger.kernel.org
Description: This attribute file will display what type of Error detection
and correction is being utilized. For example: S4ECD4ED would
@ -111,7 +111,7 @@ Description: This attribute file will display what type of Error detection
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_label
Date: April 2012
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
linux-edac@vger.kernel.org
Description: This control file allows this DIMM to have a label assigned
to it. With this label in the module, when errors occur
@ -126,14 +126,14 @@ Description: This control file allows this DIMM to have a label assigned
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_location
Date: April 2012
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
linux-edac@vger.kernel.org
Description: This attribute file will display the location (csrow/channel,
branch/channel/slot or channel/slot) of the dimm or rank.
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_mem_type
Date: April 2012
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
linux-edac@vger.kernel.org
Description: This attribute file will display what type of memory is
currently on this csrow. Normally, either buffered or

21
Documentation/ABI/testing/sysfs-driver-intel-rapid-start Normal file
View File

@ -0,0 +1,21 @@
What: /sys/bus/acpi/intel-rapid-start/wakeup_events
Date: July 2, 2013
KernelVersion: 3.11
Contact: Matthew Garrett <mjg59@srcf.ucam.org>
Description: An integer representing a set of wakeup events as follows:
1: Wake to enter hibernation when the wakeup timer expires
2: Wake to enter hibernation when the battery reaches a
critical level
These values are ORed together. For example, a value of 3
indicates that the system will wake to enter hibernation when
either the wakeup timer expires or the battery reaches a
critical level.
What: /sys/bus/acpi/intel-rapid-start/wakeup_time
Date: July 2, 2013
KernelVersion: 3.11
Contact: Matthew Garrett <mjg59@srcf.ucam.org>
Description: An integer representing the length of time the system will
remain asleep before waking up to enter hibernation.
This value is in minutes.

17
Documentation/ABI/testing/sysfs-driver-xen-blkback Normal file
View File

@ -0,0 +1,17 @@
What: /sys/module/xen_blkback/parameters/max_buffer_pages
Date: March 2013
KernelVersion: 3.11
Contact: Roger Pau Monné <roger.pau@citrix.com>
Description:
Maximum number of free pages to keep in each block
backend buffer.
What: /sys/module/xen_blkback/parameters/max_persistent_grants
Date: March 2013
KernelVersion: 3.11
Contact: Roger Pau Monné <roger.pau@citrix.com>
Description:
Maximum number of grants to map persistently in
blkback. If the frontend tries to use more than
max_persistent_grants, the LRU kicks in and starts
removing 5% of max_persistent_grants every 100ms.

10
Documentation/ABI/testing/sysfs-driver-xen-blkfront Normal file
View File

@ -0,0 +1,10 @@
What: /sys/module/xen_blkfront/parameters/max
Date: June 2013
KernelVersion: 3.11
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Maximum number of segments that the frontend will negotiate
with the backend for indirect descriptors. The default value
is 32 - higher value means more potential throughput but more
memory usage. The backend picks the minimum of the frontend
and its default backend value.

13
Documentation/DocBook/80211.tmpl
View File

@ -127,14 +127,11 @@
!Finclude/net/cfg80211.h cfg80211_ibss_params
!Finclude/net/cfg80211.h cfg80211_connect_params
!Finclude/net/cfg80211.h cfg80211_pmksa
!Finclude/net/cfg80211.h cfg80211_send_rx_auth
!Finclude/net/cfg80211.h cfg80211_send_auth_timeout
!Finclude/net/cfg80211.h cfg80211_send_rx_assoc
!Finclude/net/cfg80211.h cfg80211_send_assoc_timeout
!Finclude/net/cfg80211.h cfg80211_send_deauth
!Finclude/net/cfg80211.h __cfg80211_send_deauth
!Finclude/net/cfg80211.h cfg80211_send_disassoc
!Finclude/net/cfg80211.h __cfg80211_send_disassoc
!Finclude/net/cfg80211.h cfg80211_rx_mlme_mgmt
!Finclude/net/cfg80211.h cfg80211_auth_timeout
!Finclude/net/cfg80211.h cfg80211_rx_assoc_resp
!Finclude/net/cfg80211.h cfg80211_assoc_timeout
!Finclude/net/cfg80211.h cfg80211_tx_mlme_mgmt
!Finclude/net/cfg80211.h cfg80211_ibss_joined
!Finclude/net/cfg80211.h cfg80211_connect_result
!Finclude/net/cfg80211.h cfg80211_roamed

2
Documentation/DocBook/device-drivers.tmpl
View File

@ -126,6 +126,8 @@ X!Edrivers/base/interface.c
</sect1>
<sect1><title>Device Drivers DMA Management</title>
!Edrivers/base/dma-buf.c
!Edrivers/base/reservation.c
!Iinclude/linux/reservation.h
!Edrivers/base/dma-coherent.c
!Edrivers/base/dma-mapping.c
</sect1>

271
Documentation/DocBook/drm.tmpl
View File

@ -186,11 +186,12 @@
<varlistentry>
<term>DRIVER_HAVE_IRQ</term><term>DRIVER_IRQ_SHARED</term>
<listitem><para>
DRIVER_HAVE_IRQ indicates whether the driver has an IRQ handler. The
DRM core will automatically register an interrupt handler when the
flag is set. DRIVER_IRQ_SHARED indicates whether the device &amp;
handler support shared IRQs (note that this is required of PCI
drivers).
DRIVER_HAVE_IRQ indicates whether the driver has an IRQ handler
managed by the DRM Core. The core will support simple IRQ handler
installation when the flag is set. The installation process is
described in <xref linkend="drm-irq-registration"/>.</para>
<para>DRIVER_IRQ_SHARED indicates whether the device &amp; handler
support shared IRQs (note that this is required of PCI drivers).
</para></listitem>
</varlistentry>
<varlistentry>
@ -344,50 +345,71 @@ char *date;</synopsis>
The DRM core tries to facilitate IRQ handler registration and
unregistration by providing <function>drm_irq_install</function> and
<function>drm_irq_uninstall</function> functions. Those functions only
support a single interrupt per device.
</para>
<!--!Fdrivers/char/drm/drm_irq.c drm_irq_install-->
<para>
Both functions get the device IRQ by calling
<function>drm_dev_to_irq</function>. This inline function will call a
bus-specific operation to retrieve the IRQ number. For platform devices,
<function>platform_get_irq</function>(..., 0) is used to retrieve the
IRQ number.
</para>
<para>
<function>drm_irq_install</function> starts by calling the
<methodname>irq_preinstall</methodname> driver operation. The operation
is optional and must make sure that the interrupt will not get fired by
clearing all pending interrupt flags or disabling the interrupt.
</para>
<para>
The IRQ will then be requested by a call to
<function>request_irq</function>. If the DRIVER_IRQ_SHARED driver
feature flag is set, a shared (IRQF_SHARED) IRQ handler will be
requested.
</para>
<para>
The IRQ handler function must be provided as the mandatory irq_handler
driver operation. It will get passed directly to
<function>request_irq</function> and thus has the same prototype as all
IRQ handlers. It will get called with a pointer to the DRM device as the
second argument.
</para>
<para>
Finally the function calls the optional
<methodname>irq_postinstall</methodname> driver operation. The operation
usually enables interrupts (excluding the vblank interrupt, which is
enabled separately), but drivers may choose to enable/disable interrupts
at a different time.
</para>
<para>
<function>drm_irq_uninstall</function> is similarly used to uninstall an
IRQ handler. It starts by waking up all processes waiting on a vblank
interrupt to make sure they don't hang, and then calls the optional
<methodname>irq_uninstall</methodname> driver operation. The operation
must disable all hardware interrupts. Finally the function frees the IRQ
by calling <function>free_irq</function>.
support a single interrupt per device, devices that use more than one
IRQs need to be handled manually.
</para>
<sect4>
<title>Managed IRQ Registration</title>
<para>
Both the <function>drm_irq_install</function> and
<function>drm_irq_uninstall</function> functions get the device IRQ by
calling <function>drm_dev_to_irq</function>. This inline function will
call a bus-specific operation to retrieve the IRQ number. For platform
devices, <function>platform_get_irq</function>(..., 0) is used to
retrieve the IRQ number.
</para>
<para>
<function>drm_irq_install</function> starts by calling the
<methodname>irq_preinstall</methodname> driver operation. The operation
is optional and must make sure that the interrupt will not get fired by
clearing all pending interrupt flags or disabling the interrupt.
</para>
<para>
The IRQ will then be requested by a call to
<function>request_irq</function>. If the DRIVER_IRQ_SHARED driver
feature flag is set, a shared (IRQF_SHARED) IRQ handler will be
requested.
</para>
<para>
The IRQ handler function must be provided as the mandatory irq_handler
driver operation. It will get passed directly to
<function>request_irq</function> and thus has the same prototype as all
IRQ handlers. It will get called with a pointer to the DRM device as the
second argument.
</para>
<para>
Finally the function calls the optional
<methodname>irq_postinstall</methodname> driver operation. The operation
usually enables interrupts (excluding the vblank interrupt, which is
enabled separately), but drivers may choose to enable/disable interrupts
at a different time.
</para>
<para>
<function>drm_irq_uninstall</function> is similarly used to uninstall an
IRQ handler. It starts by waking up all processes waiting on a vblank
interrupt to make sure they don't hang, and then calls the optional
<methodname>irq_uninstall</methodname> driver operation. The operation
must disable all hardware interrupts. Finally the function frees the IRQ
by calling <function>free_irq</function>.
</para>
</sect4>
<sect4>
<title>Manual IRQ Registration</title>
<para>
Drivers that require multiple interrupt handlers can't use the managed
IRQ registration functions. In that case IRQs must be registered and
unregistered manually (usually with the <function>request_irq</function>
and <function>free_irq</function> functions, or their devm_* equivalent).
</para>
<para>
When manually registering IRQs, drivers must not set the DRIVER_HAVE_IRQ
driver feature flag, and must not provide the
<methodname>irq_handler</methodname> driver operation. They must set the
<structname>drm_device</structname> <structfield>irq_enabled</structfield>
field to 1 upon registration of the IRQs, and clear it to 0 after
unregistering the IRQs.
</para>
</sect4>
</sect3>
<sect3>
<title>Memory Manager Initialization</title>
@ -1213,6 +1235,15 @@ int max_width, max_height;</synopsis>
<sect4>
<title>Miscellaneous</title>
<itemizedlist>
<listitem>
<synopsis>void (*set_property)(struct drm_crtc *crtc,
struct drm_property *property, uint64_t value);</synopsis>
<para>
Set the value of the given CRTC property to
<parameter>value</parameter>. See <xref linkend="drm-kms-properties"/>
for more information about properties.
</para>
</listitem>
<listitem>
<synopsis>void (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
uint32_t start, uint32_t size);</synopsis>
@ -1363,6 +1394,15 @@ int max_width, max_height;</synopsis>
<xref linkend="drm-kms-init"/>.
</para>
</listitem>
<listitem>
<synopsis>void (*set_property)(struct drm_plane *plane,
struct drm_property *property, uint64_t value);</synopsis>
<para>
Set the value of the given plane property to
<parameter>value</parameter>. See <xref linkend="drm-kms-properties"/>
for more information about properties.
</para>
</listitem>
</itemizedlist>
</sect3>
</sect2>
@ -1571,6 +1611,15 @@ int max_width, max_height;</synopsis>
<sect4>
<title>Miscellaneous</title>
<itemizedlist>
<listitem>
<synopsis>void (*set_property)(struct drm_connector *connector,
struct drm_property *property, uint64_t value);</synopsis>
<para>
Set the value of the given connector property to
<parameter>value</parameter>. See <xref linkend="drm-kms-properties"/>
for more information about properties.
</para>
</listitem>
<listitem>
<synopsis>void (*destroy)(struct drm_connector *connector);</synopsis>
<para>
@ -1846,10 +1895,6 @@ void intel_crt_init(struct drm_device *dev)
<synopsis>bool (*mode_fixup)(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);</synopsis>
<note><para>
FIXME: The mode argument be const, but the i915 driver modifies
mode-&gt;clock in <function>intel_dp_mode_fixup</function>.
</para></note>
<para>
Let encoders adjust the requested mode or reject it completely. This
operation returns true if the mode is accepted (possibly after being
@ -2161,6 +2206,128 @@ void intel_crt_init(struct drm_device *dev)
<title>EDID Helper Functions Reference</title>
!Edrivers/gpu/drm/drm_edid.c
</sect2>
<sect2>
<title>Rectangle Utilities Reference</title>
!Pinclude/drm/drm_rect.h rect utils
!Iinclude/drm/drm_rect.h
!Edrivers/gpu/drm/drm_rect.c
</sect2>
</sect1>
<!-- Internals: kms properties -->
<sect1 id="drm-kms-properties">
<title>KMS Properties</title>
<para>
Drivers may need to expose additional parameters to applications than
those described in the previous sections. KMS supports attaching
properties to CRTCs, connectors and planes and offers a userspace API to
list, get and set the property values.
</para>
<para>
Properties are identified by a name that uniquely defines the property
purpose, and store an associated value. For all property types except blob
properties the value is a 64-bit unsigned integer.
</para>
<para>
KMS differentiates between properties and property instances. Drivers
first create properties and then create and associate individual instances
of those properties to objects. A property can be instantiated multiple
times and associated with different objects. Values are stored in property
instances, and all other property information are stored in the propery
and shared between all instances of the property.
</para>
<para>
Every property is created with a type that influences how the KMS core
handles the property. Supported property types are
<variablelist>
<varlistentry>
<term>DRM_MODE_PROP_RANGE</term>
<listitem><para>Range properties report their minimum and maximum
admissible values. The KMS core verifies that values set by
application fit in that range.</para></listitem>
</varlistentry>
<varlistentry>
<term>DRM_MODE_PROP_ENUM</term>
<listitem><para>Enumerated properties take a numerical value that
ranges from 0 to the number of enumerated values defined by the
property minus one, and associate a free-formed string name to each
value. Applications can retrieve the list of defined value-name pairs
and use the numerical value to get and set property instance values.
</para></listitem>
</varlistentry>
<varlistentry>
<term>DRM_MODE_PROP_BITMASK</term>
<listitem><para>Bitmask properties are enumeration properties that
additionally restrict all enumerated values to the 0..63 range.
Bitmask property instance values combine one or more of the
enumerated bits defined by the property.</para></listitem>
</varlistentry>
<varlistentry>
<term>DRM_MODE_PROP_BLOB</term>
<listitem><para>Blob properties store a binary blob without any format
restriction. The binary blobs are created as KMS standalone objects,
and blob property instance values store the ID of their associated
blob object.</para>
<para>Blob properties are only used for the connector EDID property
and cannot be created by drivers.</para></listitem>
</varlistentry>
</variablelist>
</para>
<para>
To create a property drivers call one of the following functions depending
on the property type. All property creation functions take property flags
and name, as well as type-specific arguments.
<itemizedlist>
<listitem>
<synopsis>struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
const char *name,
uint64_t min, uint64_t max);</synopsis>
<para>Create a range property with the given minimum and maximum
values.</para>
</listitem>
<listitem>
<synopsis>struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
const char *name,
const struct drm_prop_enum_list *props,
int num_values);</synopsis>
<para>Create an enumerated property. The <parameter>props</parameter>
argument points to an array of <parameter>num_values</parameter>
value-name pairs.</para>
</listitem>
<listitem>
<synopsis>struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
int flags, const char *name,
const struct drm_prop_enum_list *props,
int num_values);</synopsis>
<para>Create a bitmask property. The <parameter>props</parameter>
argument points to an array of <parameter>num_values</parameter>
value-name pairs.</para>
</listitem>
</itemizedlist>
</para>
<para>
Properties can additionally be created as immutable, in which case they
will be read-only for applications but can be modified by the driver. To
create an immutable property drivers must set the DRM_MODE_PROP_IMMUTABLE
flag at property creation time.
</para>
<para>
When no array of value-name pairs is readily available at property
creation time for enumerated or range properties, drivers can create
the property using the <function>drm_property_create</function> function
and manually add enumeration value-name pairs by calling the
<function>drm_property_add_enum</function> function. Care must be taken to
properly specify the property type through the <parameter>flags</parameter>
argument.
</para>
<para>
After creating properties drivers can attach property instances to CRTC,
connector and plane objects by calling the
<function>drm_object_attach_property</function>. The function takes a
pointer to the target object, a pointer to the previously created property
and an initial instance value.
</para>
</sect1>
<!-- Internals: vertical blanking -->

14
Documentation/DocBook/media/v4l/compat.xml
View File

@ -2254,7 +2254,7 @@ video encoding.</para>
<orderedlist>
<listitem>
<para>The <constant>VIDIOC_G_CHIP_IDENT</constant> ioctl was renamed
to <constant>VIDIOC_G_CHIP_IDENT_OLD</constant> and &VIDIOC-DBG-G-CHIP-IDENT;
to <constant>VIDIOC_G_CHIP_IDENT_OLD</constant> and <constant>VIDIOC_DBG_G_CHIP_IDENT</constant>
was introduced in its place. The old struct <structname>v4l2_chip_ident</structname>
was renamed to <structname id="v4l2-chip-ident-old">v4l2_chip_ident_old</structname>.</para>
</listitem>
@ -2513,6 +2513,16 @@ that used it. It was originally scheduled for removal in 2.6.35.
</orderedlist>
</section>
<section>
<title>V4L2 in Linux 3.11</title>
<orderedlist>
<listitem>
<para>Remove obsolete <constant>VIDIOC_DBG_G_CHIP_IDENT</constant> ioctl.
</para>
</listitem>
</orderedlist>
</section>
<section id="other">
<title>Relation of V4L2 to other Linux multimedia APIs</title>
@ -2596,7 +2606,7 @@ and may change in the future.</para>
ioctls.</para>
</listitem>
<listitem>
<para>&VIDIOC-DBG-G-CHIP-IDENT; ioctl.</para>
<para>&VIDIOC-DBG-G-CHIP-INFO; ioctl.</para>
</listitem>
<listitem>
<para>&VIDIOC-ENUM-DV-TIMINGS;, &VIDIOC-QUERY-DV-TIMINGS; and

11
Documentation/DocBook/media/v4l/v4l2.xml
View File

@ -140,6 +140,14 @@ 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>3.11</revnumber>
<date>2013-05-26</date>
<authorinitials>hv</authorinitials>
<revremark>Remove obsolete VIDIOC_DBG_G_CHIP_IDENT ioctl.
</revremark>
</revision>
<revision>
<revnumber>3.10</revnumber>
<date>2013-03-25</date>
@ -493,7 +501,7 @@ and discussions on the V4L mailing list.</revremark>
</partinfo>
<title>Video for Linux Two API Specification</title>
<subtitle>Revision 3.10</subtitle>
<subtitle>Revision 3.11</subtitle>
<chapter id="common">
&sub-common;
@ -547,7 +555,6 @@ and discussions on the V4L mailing list.</revremark>
<!-- All ioctls go here. -->
&sub-create-bufs;
&sub-cropcap;
&sub-dbg-g-chip-ident;
&sub-dbg-g-chip-info;
&sub-dbg-g-register;
&sub-decoder-cmd;

271
Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-ident.xml
View File

@ -1,271 +0,0 @@
<refentry id="vidioc-dbg-g-chip-ident">
<refmeta>
<refentrytitle>ioctl VIDIOC_DBG_G_CHIP_IDENT</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>VIDIOC_DBG_G_CHIP_IDENT</refname>
<refpurpose>Identify the chips on a TV card</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>struct v4l2_dbg_chip_ident
*<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>&fd;</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>VIDIOC_DBG_G_CHIP_IDENT</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<note>
<title>Experimental</title>
<para>This is an <link
linkend="experimental">experimental</link> interface and may change in
the future.</para>
</note>
<para>For driver debugging purposes this ioctl allows test
applications to query the driver about the chips present on the TV
card. Regular applications must not use it. When you found a chip
specific bug, please contact the linux-media mailing list (&v4l-ml;)
so it can be fixed.</para>
<para>To query the driver applications must initialize the
<structfield>match.type</structfield> and
<structfield>match.addr</structfield> or <structfield>match.name</structfield>
fields of a &v4l2-dbg-chip-ident;
and call <constant>VIDIOC_DBG_G_CHIP_IDENT</constant> with a pointer to
this structure. On success the driver stores information about the
selected chip in the <structfield>ident</structfield> and
<structfield>revision</structfield> fields. On failure the structure
remains unchanged.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_HOST</constant>,
<structfield>match.addr</structfield> selects the nth non-&i2c; chip
on the TV card. You can enumerate all chips by starting at zero and
incrementing <structfield>match.addr</structfield> by one until
<constant>VIDIOC_DBG_G_CHIP_IDENT</constant> fails with an &EINVAL;.
The number zero always selects the host chip, &eg; the chip connected
to the PCI or USB bus.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_I2C_DRIVER</constant>,
<structfield>match.name</structfield> contains the I2C driver name.
For instance
<constant>"saa7127"</constant> will match any chip
supported by the saa7127 driver, regardless of its &i2c; bus address.
When multiple chips supported by the same driver are present, the
ioctl will return <constant>V4L2_IDENT_AMBIGUOUS</constant> in the
<structfield>ident</structfield> field.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_I2C_ADDR</constant>,
<structfield>match.addr</structfield> selects a chip by its 7 bit
&i2c; bus address.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_AC97</constant>,
<structfield>match.addr</structfield> selects the nth AC97 chip
on the TV card. You can enumerate all chips by starting at zero and
incrementing <structfield>match.addr</structfield> by one until
<constant>VIDIOC_DBG_G_CHIP_IDENT</constant> fails with an &EINVAL;.</para>
<para>On success, the <structfield>ident</structfield> field will
contain a chip ID from the Linux
<filename>media/v4l2-chip-ident.h</filename> header file, and the
<structfield>revision</structfield> field will contain a driver
specific value, or zero if no particular revision is associated with
this chip.</para>
<para>When the driver could not identify the selected chip,
<structfield>ident</structfield> will contain
<constant>V4L2_IDENT_UNKNOWN</constant>. When no chip matched
the ioctl will succeed but the
<structfield>ident</structfield> field will contain
<constant>V4L2_IDENT_NONE</constant>. If multiple chips matched,
<structfield>ident</structfield> will contain
<constant>V4L2_IDENT_AMBIGUOUS</constant>. In all these cases the
<structfield>revision</structfield> field remains unchanged.</para>
<para>This ioctl is optional, not all drivers may support it. It
was introduced in Linux 2.6.21, but the API was changed to the
one described here in 2.6.29.</para>
<para>We recommended the <application>v4l2-dbg</application>
utility over calling this ioctl directly. It is available from the
LinuxTV v4l-dvb repository; see <ulink
url="http://linuxtv.org/repo/">http://linuxtv.org/repo/</ulink> for
access instructions.</para>
<!-- Note for convenience vidioc-dbg-g-register.sgml
contains a duplicate of this table. -->
<table pgwide="1" frame="none" id="ident-v4l2-dbg-match">
<title>struct <structname>v4l2_dbg_match</structname></title>
<tgroup cols="4">
&cs-ustr;
<tbody valign="top">
<row>
<entry>__u32</entry>
<entry><structfield>type</structfield></entry>
<entry>See <xref linkend="ident-chip-match-types" /> for a list of
possible types.</entry>
</row>
<row>
<entry>union</entry>
<entry>(anonymous)</entry>
</row>
<row>
<entry></entry>
<entry>__u32</entry>
<entry><structfield>addr</structfield></entry>
<entry>Match a chip by this number, interpreted according
to the <structfield>type</structfield> field.</entry>
</row>
<row>
<entry></entry>
<entry>char</entry>
<entry><structfield>name[32]</structfield></entry>
<entry>Match a chip by this name, interpreted according
to the <structfield>type</structfield> field.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="v4l2-dbg-chip-ident">
<title>struct <structname>v4l2_dbg_chip_ident</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>struct v4l2_dbg_match</entry>
<entry><structfield>match</structfield></entry>
<entry>How to match the chip, see <xref linkend="ident-v4l2-dbg-match" />.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>ident</structfield></entry>
<entry>A chip identifier as defined in the Linux
<filename>media/v4l2-chip-ident.h</filename> header file, or one of
the values from <xref linkend="chip-ids" />.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>revision</structfield></entry>
<entry>A chip revision, chip and driver specific.</entry>
</row>
</tbody>
</tgroup>
</table>
<!-- Note for convenience vidioc-dbg-g-register.sgml
contains a duplicate of this table. -->
<table pgwide="1" frame="none" id="ident-chip-match-types">
<title>Chip Match Types</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>V4L2_CHIP_MATCH_BRIDGE</constant></entry>
<entry>0</entry>
<entry>Match the nth chip on the card, zero for the
bridge chip. Does not match sub-devices.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_I2C_DRIVER</constant></entry>
<entry>1</entry>
<entry>Match an &i2c; chip by its driver name.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_I2C_ADDR</constant></entry>
<entry>2</entry>
<entry>Match a chip by its 7 bit &i2c; bus address.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_AC97</constant></entry>
<entry>3</entry>
<entry>Match the nth anciliary AC97 chip.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
<entry>4</entry>
<entry>Match the nth sub-device. Can't be used with this ioctl.</entry>
</row>
</tbody>
</tgroup>
</table>
<!-- This is an anonymous enum in media/v4l2-chip-ident.h. -->
<table pgwide="1" frame="none" id="chip-ids">
<title>Chip Identifiers</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>V4L2_IDENT_NONE</constant></entry>
<entry>0</entry>
<entry>No chip matched.</entry>
</row>
<row>
<entry><constant>V4L2_IDENT_AMBIGUOUS</constant></entry>
<entry>1</entry>
<entry>Multiple chips matched.</entry>
</row>
<row>
<entry><constant>V4L2_IDENT_UNKNOWN</constant></entry>
<entry>2</entry>
<entry>A chip is present at this address, but the driver
could not identify it.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
<variablelist>
<varlistentry>
<term><errorcode>EINVAL</errorcode></term>
<listitem>
<para>The <structfield>match_type</structfield> is invalid.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>

20
Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-info.xml
View File

@ -73,8 +73,7 @@ fields of a &v4l2-dbg-chip-info;
and call <constant>VIDIOC_DBG_G_CHIP_INFO</constant> with a pointer to
this structure. On success the driver stores information about the
selected chip in the <structfield>name</structfield> and
<structfield>flags</structfield> fields. On failure the structure
remains unchanged.</para>
<structfield>flags</structfield> fields.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_BRIDGE</constant>,
@ -132,7 +131,7 @@ to the <structfield>type</structfield> field.</entry>
<entry>char</entry>
<entry><structfield>name[32]</structfield></entry>
<entry>Match a chip by this name, interpreted according
to the <structfield>type</structfield> field.</entry>
to the <structfield>type</structfield> field. Currently unused.</entry>
</row>
</tbody>
</tgroup>
@ -182,21 +181,6 @@ is set, then the driver supports reading registers from the device. If
<entry>Match the nth chip on the card, zero for the
bridge chip. Does not match sub-devices.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_I2C_DRIVER</constant></entry>
<entry>1</entry>
<entry>Match an &i2c; chip by its driver name. Can't be used with this ioctl.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_I2C_ADDR</constant></entry>
<entry>2</entry>
<entry>Match a chip by its 7 bit &i2c; bus address. Can't be used with this ioctl.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_AC97</constant></entry>
<entry>3</entry>
<entry>Match the nth anciliary AC97 chip. Can't be used with this ioctl.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
<entry>4</entry>

64
Documentation/DocBook/media/v4l/vidioc-dbg-g-register.xml
View File

@ -76,7 +76,7 @@ compiled with the <constant>CONFIG_VIDEO_ADV_DEBUG</constant> option
to enable these ioctls.</para>
<para>To write a register applications must initialize all fields
of a &v4l2-dbg-register; and call
of a &v4l2-dbg-register; except for <structfield>size</structfield> and call
<constant>VIDIOC_DBG_S_REGISTER</constant> with a pointer to this
structure. The <structfield>match.type</structfield> and
<structfield>match.addr</structfield> or <structfield>match.name</structfield>
@ -91,8 +91,8 @@ written into the register.</para>
<structfield>reg</structfield> fields, and call
<constant>VIDIOC_DBG_G_REGISTER</constant> with a pointer to this
structure. On success the driver stores the register value in the
<structfield>val</structfield> field. On failure the structure remains
unchanged.</para>
<structfield>val</structfield> field and the size (in bytes) of the
value in <structfield>size</structfield>.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_BRIDGE</constant>,
@ -101,40 +101,10 @@ on the TV card. The number zero always selects the host chip, &eg; the
chip connected to the PCI or USB bus. You can find out which chips are
present with the &VIDIOC-DBG-G-CHIP-INFO; ioctl.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_I2C_DRIVER</constant>,
<structfield>match.name</structfield> contains the I2C driver name.
For instance
<constant>"saa7127"</constant> will match any chip
supported by the saa7127 driver, regardless of its &i2c; bus address.
When multiple chips supported by the same driver are present, the
effect of these ioctls is undefined. Again with the
&VIDIOC-DBG-G-CHIP-INFO; ioctl you can find out which &i2c; chips are
present.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_I2C_ADDR</constant>,
<structfield>match.addr</structfield> selects a chip by its 7 bit &i2c;
bus address.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_AC97</constant>,
<structfield>match.addr</structfield> selects the nth AC97 chip
on the TV card.</para>
<para>When <structfield>match.type</structfield> is
<constant>V4L2_CHIP_MATCH_SUBDEV</constant>,
<structfield>match.addr</structfield> selects the nth sub-device.</para>
<note>
<title>Success not guaranteed</title>
<para>Due to a flaw in the Linux &i2c; bus driver these ioctls may
return successfully without actually reading or writing a register. To
catch the most likely failure we recommend a &VIDIOC-DBG-G-CHIP-INFO;
call confirming the presence of the selected &i2c; chip.</para>
</note>
<para>These ioctls are optional, not all drivers may support them.
However when a driver supports these ioctls it must also support
&VIDIOC-DBG-G-CHIP-INFO;. Conversely it may support
@ -150,7 +120,7 @@ LinuxTV v4l-dvb repository; see <ulink
url="http://linuxtv.org/repo/">http://linuxtv.org/repo/</ulink> for
access instructions.</para>
<!-- Note for convenience vidioc-dbg-g-chip-ident.sgml
<!-- Note for convenience vidioc-dbg-g-chip-info.sgml
contains a duplicate of this table. -->
<table pgwide="1" frame="none" id="v4l2-dbg-match">
<title>struct <structname>v4l2_dbg_match</structname></title>
@ -160,7 +130,7 @@ access instructions.</para>
<row>
<entry>__u32</entry>
<entry><structfield>type</structfield></entry>
<entry>See <xref linkend="ident-chip-match-types" /> for a list of
<entry>See <xref linkend="chip-match-types" /> for a list of
possible types.</entry>
</row>
<row>
@ -179,7 +149,7 @@ to the <structfield>type</structfield> field.</entry>
<entry>char</entry>
<entry><structfield>name[32]</structfield></entry>
<entry>Match a chip by this name, interpreted according
to the <structfield>type</structfield> field.</entry>
to the <structfield>type</structfield> field. Currently unused.</entry>
</row>
</tbody>
</tgroup>
@ -198,6 +168,11 @@ to the <structfield>type</structfield> field.</entry>
<entry><structfield>match</structfield></entry>
<entry>How to match the chip, see <xref linkend="v4l2-dbg-match" />.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>size</structfield></entry>
<entry>The register size in bytes.</entry>
</row>
<row>
<entry>__u64</entry>
<entry><structfield>reg</structfield></entry>
@ -213,7 +188,7 @@ register.</entry>
</tgroup>
</table>
<!-- Note for convenience vidioc-dbg-g-chip-ident.sgml
<!-- Note for convenience vidioc-dbg-g-chip-info.sgml
contains a duplicate of this table. -->
<table pgwide="1" frame="none" id="chip-match-types">
<title>Chip Match Types</title>
@ -226,21 +201,6 @@ register.</entry>
<entry>Match the nth chip on the card, zero for the
bridge chip. Does not match sub-devices.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_I2C_DRIVER</constant></entry>
<entry>1</entry>
<entry>Match an &i2c; chip by its driver name.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_I2C_ADDR</constant></entry>
<entry>2</entry>
<entry>Match a chip by its 7 bit &i2c; bus address.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_AC97</constant></entry>
<entry>3</entry>
<entry>Match the nth anciliary AC97 chip.</entry>
</row>
<row>
<entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
<entry>4</entry>

3
Documentation/DocBook/media/v4l/vidioc-querystd.xml
View File

@ -54,7 +54,8 @@ standard automatically. To do so, applications call <constant>
VIDIOC_QUERYSTD</constant> with a pointer to a &v4l2-std-id; type. The
driver stores here a set of candidates, this can be a single flag or a
set of supported standards if for example the hardware can only
distinguish between 50 and 60 Hz systems. When detection is not
distinguish between 50 and 60 Hz systems. If no signal was detected,
then the driver will return V4L2_STD_UNKNOWN. When detection is not
possible or fails, the set must contain all standards supported by the
current video input or output.</para>

37
Documentation/bcache.txt
View File

@ -46,29 +46,33 @@ you format your backing devices and cache device at the same time, you won't
have to manually attach:
make-bcache -B /dev/sda /dev/sdb -C /dev/sdc
To make bcache devices known to the kernel, echo them to /sys/fs/bcache/register:
bcache-tools now ships udev rules, and bcache devices are known to the kernel
immediately. Without udev, you can manually register devices like this:
echo /dev/sdb > /sys/fs/bcache/register
echo /dev/sdc > /sys/fs/bcache/register
To register your bcache devices automatically, you could add something like
this to an init script:
Registering the backing device makes the bcache device show up in /dev; you can
now format it and use it as normal. But the first time using a new bcache
device, it'll be running in passthrough mode until you attach it to a cache.
See the section on attaching.
echo /dev/sd* > /sys/fs/bcache/register_quiet
The devices show up as:
It'll look for bcache superblocks and ignore everything that doesn't have one.
/dev/bcache<N>
Registering the backing device makes the bcache show up in /dev; you can now
format it and use it as normal. But the first time using a new bcache device,
it'll be running in passthrough mode until you attach it to a cache. See the
section on attaching.
As well as (with udev):
The devices show up at /dev/bcacheN, and can be controlled via sysfs from
/sys/block/bcacheN/bcache:
/dev/bcache/by-uuid/<uuid>
/dev/bcache/by-label/<label>
To get started:
mkfs.ext4 /dev/bcache0
mount /dev/bcache0 /mnt
You can control bcache devices through sysfs at /sys/block/bcache<N>/bcache .
Cache devices are managed as sets; multiple caches per set isn't supported yet
but will allow for mirroring of metadata and dirty data in the future. Your new
cache set shows up as /sys/fs/bcache/<UUID>
@ -80,11 +84,11 @@ must be attached to your cache set to enable caching. Attaching a backing
device to a cache set is done thusly, with the UUID of the cache set in
/sys/fs/bcache:
echo <UUID> > /sys/block/bcache0/bcache/attach
echo <CSET-UUID> > /sys/block/bcache0/bcache/attach
This only has to be done once. The next time you reboot, just reregister all
your bcache devices. If a backing device has data in a cache somewhere, the
/dev/bcache# device won't be created until the cache shows up - particularly
/dev/bcache<N> device won't be created until the cache shows up - particularly
important if you have writeback caching turned on.
If you're booting up and your cache device is gone and never coming back, you
@ -191,6 +195,9 @@ want for getting the best possible numbers when benchmarking.
SYSFS - BACKING DEVICE:
Available at /sys/block/<bdev>/bcache, /sys/block/bcache*/bcache and
(if attached) /sys/fs/bcache/<cset-uuid>/bdev*
attach
Echo the UUID of a cache set to this file to enable caching.
@ -300,6 +307,8 @@ cache_readaheads
SYSFS - CACHE SET:
Available at /sys/fs/bcache/<cset-uuid>
average_key_size
Average data per key in the btree.
@ -390,6 +399,8 @@ trigger_gc
SYSFS - CACHE DEVICE:
Available at /sys/block/<cdev>/bcache
block_size
Minimum granularity of writes - should match hardware sector size.

29
Documentation/cgroups/blkio-controller.txt
View File

@ -94,11 +94,13 @@ Throttling/Upper Limit policy
Hierarchical Cgroups
====================
- Currently only CFQ supports hierarchical groups. For throttling,
cgroup interface does allow creation of hierarchical cgroups and
internally it treats them as flat hierarchy.
If somebody created a hierarchy like as follows.
Both CFQ and throttling implement hierarchy support; however,
throttling's hierarchy support is enabled iff "sane_behavior" is
enabled from cgroup side, which currently is a development option and
not publicly available.
If somebody created a hierarchy like as follows.
root
/ \
@ -106,21 +108,20 @@ Hierarchical Cgroups
|
test3
CFQ will handle the hierarchy correctly but and throttling will
practically treat all groups at same level. For details on CFQ
hierarchy support, refer to Documentation/block/cfq-iosched.txt.
Throttling will treat the hierarchy as if it looks like the
following.
CFQ by default and throttling with "sane_behavior" will handle the
hierarchy correctly. For details on CFQ hierarchy support, refer to
Documentation/block/cfq-iosched.txt. For throttling, all limits apply
to the whole subtree while all statistics are local to the IOs
directly generated by tasks in that cgroup.
Throttling without "sane_behavior" enabled from cgroup side will
practically treat all groups at same level as if it looks like the
following.
pivot
/ / \ \
root test1 test2 test3
Nesting cgroups, while allowed, isn't officially supported and blkio
genereates warning when cgroups nest. Once throttling implements
hierarchy support, hierarchy will be supported and the warning will
be removed.
Various user visible config options
===================================
CONFIG_BLK_CGROUP

63
Documentation/coccinelle.txt
View File

@ -6,15 +6,17 @@ Copyright 2010 Gilles Muller <Gilles.Muller@lip6.fr>
Getting Coccinelle
~~~~~~~~~~~~~~~~~~~~
The semantic patches included in the kernel use the 'virtual rule'
feature which was introduced in Coccinelle version 0.1.11.
The semantic patches included in the kernel use features and options
which are provided by Coccinelle version 1.0.0-rc11 and above.
Using earlier versions will fail as the option names used by
the Coccinelle files and coccicheck have been updated.
Coccinelle (>=0.2.0) is available through the package manager
Coccinelle is available through the package manager
of many distributions, e.g. :
- Debian (>=squeeze)
- Fedora (>=13)
- Ubuntu (>=10.04 Lucid Lynx)
- Debian
- Fedora
- Ubuntu
- OpenSUSE
- Arch Linux
- NetBSD
@ -36,11 +38,6 @@ as a regular user, and install it with
sudo make install
The semantic patches in the kernel will work best with Coccinelle version
0.2.4 or later. Using earlier versions may incur some parse errors in the
semantic patch code, but any results that are obtained should still be
correct.
Using Coccinelle on the Linux kernel
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@ -48,7 +45,7 @@ A Coccinelle-specific target is defined in the top level
Makefile. This target is named 'coccicheck' and calls the 'coccicheck'
front-end in the 'scripts' directory.
Four modes are defined: patch, report, context, and org. The mode to
Four basic modes are defined: patch, report, context, and org. The mode to
use is specified by setting the MODE variable with 'MODE=<mode>'.
'patch' proposes a fix, when possible.
@ -62,18 +59,24 @@ diff-like style.Lines of interest are indicated with '-'.
'org' generates a report in the Org mode format of Emacs.
Note that not all semantic patches implement all modes. For easy use
of Coccinelle, the default mode is "chain" which tries the previous
modes in the order above until one succeeds.
of Coccinelle, the default mode is "report".
To make a report for every semantic patch, run the following command:
Two other modes provide some common combinations of these modes.
make coccicheck MODE=report
'chain' tries the previous modes in the order above until one succeeds.
NB: The 'report' mode is the default one.
'rep+ctxt' runs successively the report mode and the context mode.
It should be used with the C option (described later)
which checks the code on a file basis.
To produce patches, run:
Examples:
To make a report for every semantic patch, run the following command:
make coccicheck MODE=patch
make coccicheck MODE=report
To produce patches, run:
make coccicheck MODE=patch
The coccicheck target applies every semantic patch available in the
@ -91,6 +94,11 @@ To enable verbose messages set the V= variable, for example:
make coccicheck MODE=report V=1
By default, coccicheck tries to run as parallel as possible. To change
the parallelism, set the J= variable. For example, to run across 4 CPUs:
make coccicheck MODE=report J=4
Using Coccinelle with a single semantic patch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@ -124,26 +132,33 @@ To check only newly edited code, use the value 2 for the C flag, i.e.
make C=2 CHECK="scripts/coccicheck"
In these modes, which works on a file basis, there is no information
about semantic patches displayed, and no commit message proposed.
This runs every semantic patch in scripts/coccinelle by default. The
COCCI variable may additionally be used to only apply a single
semantic patch as shown in the previous section.
The "chain" mode is the default. You can select another one with the
The "report" mode is the default. You can select another one with the
MODE variable explained above.
In this mode, there is no information about semantic patches
displayed, and no commit message proposed.
Additional flags
~~~~~~~~~~~~~~~~~~
Additional flags can be passed to spatch through the SPFLAGS
variable.
make SPFLAGS=--use_glimpse coccicheck
make SPFLAGS=--use-glimpse coccicheck
make SPFLAGS=--use-idutils coccicheck
See spatch --help to learn more about spatch options.
Note that the '--use-glimpse' and '--use-idutils' options
require external tools for indexing the code. None of them is
thus active by default. However, by indexing the code with
one of these tools, and according to the cocci file used,
spatch could proceed the entire code base more quickly.
Proposing new semantic patches
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

6
Documentation/cpu-hotplug.txt
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@ -267,8 +267,8 @@ Q: If i have some kernel code that needs to be aware of CPU arrival and
A: This is what you would need in your kernel code to receive notifications.
#include <linux/cpu.h>
static int __cpuinit foobar_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
static int foobar_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
@ -285,7 +285,7 @@ A: This is what you would need in your kernel code to receive notifications.
return NOTIFY_OK;
}
static struct notifier_block __cpuinitdata foobar_cpu_notifer =
static struct notifier_block foobar_cpu_notifer =
{
.notifier_call = foobar_cpu_callback,
};

126
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@ -0,0 +1,126 @@
dm-switch
=========
The device-mapper switch target creates a device that supports an
arbitrary mapping of fixed-size regions of I/O across a fixed set of
paths. The path used for any specific region can be switched
dynamically by sending the target a message.
It maps I/O to underlying block devices efficiently when there is a large
number of fixed-sized address regions but there is no simple pattern
that would allow for a compact representation of the mapping such as
dm-stripe.
Background
----------
Dell EqualLogic and some other iSCSI storage arrays use a distributed
frameless architecture. In this architecture, the storage group
consists of a number of distinct storage arrays ("members") each having
independent controllers, disk storage and network adapters. When a LUN
is created it is spread across multiple members. The details of the
spreading are hidden from initiators connected to this storage system.
The storage group exposes a single target discovery portal, no matter
how many members are being used. When iSCSI sessions are created, each
session is connected to an eth port on a single member. Data to a LUN
can be sent on any iSCSI session, and if the blocks being accessed are
stored on another member the I/O will be forwarded as required. This
forwarding is invisible to the initiator. The storage layout is also
dynamic, and the blocks stored on disk may be moved from member to
member as needed to balance the load.
This architecture simplifies the management and configuration of both
the storage group and initiators. In a multipathing configuration, it
is possible to set up multiple iSCSI sessions to use multiple network
interfaces on both the host and target to take advantage of the
increased network bandwidth. An initiator could use a simple round
robin algorithm to send I/O across all paths and let the storage array
members forward it as necessary, but there is a performance advantage to
sending data directly to the correct member.
A device-mapper table already lets you map different regions of a
device onto different targets. However in this architecture the LUN is
spread with an address region size on the order of 10s of MBs, which
means the resulting table could have more than a million entries and
consume far too much memory.
Using this device-mapper switch target we can now build a two-layer
device hierarchy:
Upper Tier – Determine which array member the I/O should be sent to.
Lower Tier – Load balance amongst paths to a particular member.
The lower tier consists of a single dm multipath device for each member.
Each of these multipath devices contains the set of paths directly to
the array member in one priority group, and leverages existing path
selectors to load balance amongst these paths. We also build a
non-preferred priority group containing paths to other array members for
failover reasons.
The upper tier consists of a single dm-switch device. This device uses
a bitmap to look up the location of the I/O and choose the appropriate
lower tier device to route the I/O. By using a bitmap we are able to
use 4 bits for each address range in a 16 member group (which is very
large for us). This is a much denser representation than the dm table
b-tree can achieve.
Construction Parameters
=======================
<num_paths> <region_size> <num_optional_args> [<optional_args>...]
[<dev_path> <offset>]+
<num_paths>
The number of paths across which to distribute the I/O.
<region_size>
The number of 512-byte sectors in a region. Each region can be redirected
to any of the available paths.
<num_optional_args>
The number of optional arguments. Currently, no optional arguments
are supported and so this must be zero.
<dev_path>
The block device that represents a specific path to the device.
<offset>
The offset of the start of data on the specific <dev_path> (in units
of 512-byte sectors). This number is added to the sector number when
forwarding the request to the specific path. Typically it is zero.
Messages
========
set_region_mappings <index>:<path_nr> [<index>]:<path_nr> [<index>]:<path_nr>...
Modify the region table by specifying which regions are redirected to
which paths.
<index>
The region number (region size was specified in constructor parameters).
If index is omitted, the next region (previous index + 1) is used.
Expressed in hexadecimal (WITHOUT any prefix like 0x).
<path_nr>
The path number in the range 0 ... (<num_paths> - 1).
Expressed in hexadecimal (WITHOUT any prefix like 0x).
Status
======
No status line is reported.
Example
=======
Assume that you have volumes vg1/switch0 vg1/switch1 vg1/switch2 with
the same size.
Create a switch device with 64kB region size:
dmsetup create switch --table "0 `blockdev --getsize /dev/vg1/switch0`
switch 3 128 0 /dev/vg1/switch0 0 /dev/vg1/switch1 0 /dev/vg1/switch2 0"
Set mappings for the first 7 entries to point to devices switch0, switch1,
switch2, switch0, switch1, switch2, switch1:
dmsetup message switch 0 set_region_mappings 0:0 :1 :2 :0 :1 :2 :1

24
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@ -0,0 +1,24 @@
* ARM Global Timer
Cortex-A9 are often associated with a per-core Global timer.
** Timer node required properties:
- compatible : Should be "arm,cortex-a9-global-timer"
Driver supports versions r2p0 and above.
- interrupts : One interrupt to each core
- reg : Specify the base address and the size of the GT timer
register window.
- clocks : Should be phandle to a clock.
Example:
timer@2c000600 {
compatible = "arm,cortex-a9-global-timer";
reg = <0x2c000600 0x20>;
interrupts = <1 13 0xf01>;
clocks = <&arm_periph_clk>;
};

7
Documentation/devicetree/bindings/dma/atmel-dma.txt
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@ -24,8 +24,11 @@ The three cells in order are:
1. A phandle pointing to the DMA controller.
2. The memory interface (16 most significant bits), the peripheral interface
(16 less significant bits).
3. The peripheral identifier for the hardware handshaking interface. The
identifier can be different for tx and rx.
3. Parameters for the at91 DMA configuration register which are device
dependant:
- bit 7-0: peripheral identifier for the hardware handshaking interface. The
identifier can be different for tx and rx.
- bit 11-8: FIFO configuration. 0 for half FIFO, 1 for ALAP, 1 for ASAP.
Example:

48
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@ -0,0 +1,48 @@
* Freescale Direct Memory Access (DMA) Controller for i.MX
This document will only describe differences to the generic DMA Controller and
DMA request bindings as described in dma/dma.txt .
* DMA controller
Required properties:
- compatible : Should be "fsl,<chip>-dma". chip can be imx1, imx21 or imx27
- reg : Should contain DMA registers location and length
- interrupts : First item should be DMA interrupt, second one is optional and
should contain DMA Error interrupt
- #dma-cells : Has to be 1. imx-dma does not support anything else.
Optional properties:
- #dma-channels : Number of DMA channels supported. Should be 16.
- #dma-requests : Number of DMA requests supported.
Example:
dma: dma@10001000 {
compatible = "fsl,imx27-dma";
reg = <0x10001000 0x1000>;
interrupts = <32 33>;
#dma-cells = <1>;
#dma-channels = <16>;
};
* DMA client
Clients have to specify the DMA requests with phandles in a list.
Required properties:
- dmas: List of one or more DMA request specifiers. One DMA request specifier
consists of a phandle to the DMA controller followed by the integer
specifiying the request line.
- dma-names: List of string identifiers for the DMA requests. For the correct
names, have a look at the specific client driver.
Example:
sdhci1: sdhci@10013000 {
...
dmas = <&dma 7>;
dma-names = "rx-tx";
...
};

56
Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
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@ -4,14 +4,70 @@ Required properties:
- compatible : Should be "fsl,<chip>-sdma"
- reg : Should contain SDMA registers location and length
- interrupts : Should contain SDMA interrupt
- #dma-cells : Must be <3>.
The first cell specifies the DMA request/event ID. See details below
about the second and third cell.
- fsl,sdma-ram-script-name : Should contain the full path of SDMA RAM
scripts firmware
The second cell of dma phandle specifies the peripheral type of DMA transfer.
The full ID of peripheral types can be found below.
ID transfer type
---------------------
0 MCU domain SSI
1 Shared SSI
2 MMC
3 SDHC
4 MCU domain UART
5 Shared UART
6 FIRI
7 MCU domain CSPI
8 Shared CSPI
9 SIM
10 ATA
11 CCM
12 External peripheral
13 Memory Stick Host Controller
14 Shared Memory Stick Host Controller
15 DSP
16 Memory
17 FIFO type Memory
18 SPDIF
19 IPU Memory
20 ASRC
21 ESAI
The third cell specifies the transfer priority as below.
ID transfer priority
-------------------------
0 High
1 Medium
2 Low
Examples:
sdma@83fb0000 {
compatible = "fsl,imx51-sdma", "fsl,imx35-sdma";
reg = <0x83fb0000 0x4000>;
interrupts = <6>;
#dma-cells = <3>;
fsl,sdma-ram-script-name = "sdma-imx51.bin";
};
DMA clients connected to the i.MX SDMA controller must use the format
described in the dma.txt file.
Examples:
ssi2: ssi@70014000 {
compatible = "fsl,imx51-ssi", "fsl,imx21-ssi";
reg = <0x70014000 0x4000>;
interrupts = <30>;
clocks = <&clks 49>;
dmas = <&sdma 24 1 0>,
<&sdma 25 1 0>;
dma-names = "rx", "tx";
fsl,fifo-depth = <15>;
};

75
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@ -0,0 +1,75 @@
* SHDMA Device Tree bindings
Sh-/r-mobile and r-car systems often have multiple identical DMA controller
instances, capable of serving any of a common set of DMA slave devices, using
the same configuration. To describe this topology we require all compatible
SHDMA DT nodes to be placed under a DMA multiplexer node. All such compatible
DMAC instances have the same number of channels and use the same DMA
descriptors. Therefore respective DMA DT bindings can also all be placed in the
multiplexer node. Even if there is only one such DMAC instance on a system, it
still has to be placed under such a multiplexer node.
* DMA multiplexer
Required properties:
- compatible: should be "renesas,shdma-mux"
- #dma-cells: should be <1>, see "dmas" property below
Optional properties (currently unused):
- dma-channels: number of DMA channels
- dma-requests: number of DMA request signals
* DMA controller
Required properties:
- compatible: should be "renesas,shdma"
Example:
dmac: dma-mux0 {
compatible = "renesas,shdma-mux";
#dma-cells = <1>;
dma-channels = <6>;
dma-requests = <256>;
reg = <0 0>; /* Needed for AUXDATA */
#address-cells = <1>;
#size-cells = <1>;
ranges;
dma0: shdma@fe008020 {
compatible = "renesas,shdma";
reg = <0xfe008020 0x270>,
<0xfe009000 0xc>;
interrupt-parent = <&gic>;
interrupts = <0 34 4
0 28 4
0 29 4
0 30 4
0 31 4
0 32 4
0 33 4>;
interrupt-names = "error",
"ch0", "ch1", "ch2", "ch3",
"ch4", "ch5";
};
dma1: shdma@fe018020 {
...
};
dma2: shdma@fe028020 {
...
};
};
* DMA client
Required properties:
- dmas: a list of <[DMA multiplexer phandle] [MID/RID value]> pairs,
where MID/RID values are fixed handles, specified in the SoC
manual
- dma-names: a list of DMA channel names, one per "dmas" entry
Example:
dmas = <&dmac 0xd1
&dmac 0xd2>;
dma-names = "tx", "rx";

8
Documentation/devicetree/bindings/drm/tilcdc/tilcdc.txt
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@ -10,6 +10,14 @@ Recommended properties:
services interrupts for this device.
- ti,hwmods: Name of the hwmod associated to the LCDC
Optional properties:
- max-bandwidth: The maximum pixels per second that the memory
interface / lcd controller combination can sustain
- max-width: The maximum horizontal pixel width supported by
the lcd controller.
- max-pixelclock: The maximum pixel clock that can be supported
by the lcd controller in KHz.
Example:
fb: fb@4830e000 {

25
Documentation/devicetree/bindings/gpio/men-a021-wdt.txt Normal file
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@ -0,0 +1,25 @@
Bindings for MEN A21 Watchdog device connected to GPIO lines
Required properties:
- compatible: "men,a021-wdt"
- gpios: Specifies the pins that control the Watchdog, order:
1: Watchdog enable
2: Watchdog fast-mode
3: Watchdog trigger
4: Watchdog reset cause bit 0
5: Watchdog reset cause bit 1
6: Watchdog reset cause bit 2
Optional properties:
- None
Example:
watchdog {
compatible ="men,a021-wdt";
gpios = <&gpio3 9 1 /* WD_EN */
&gpio3 10 1 /* WD_FAST */
&gpio3 11 1 /* WD_TRIG */
&gpio3 6 1 /* RST_CAUSE[0] */
&gpio3 7 1 /* RST_CAUSE[1] */
&gpio3 8 1>; /* RST_CAUSE[2] */
};

91
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@ -0,0 +1,91 @@
Device tree bindings for TI's ADS7843, ADS7845, ADS7846, ADS7873, TSC2046
SPI driven touch screen controllers.
The node for this driver must be a child node of a SPI controller, hence
all mandatory properties described in
Documentation/devicetree/bindings/spi/spi-bus.txt
must be specified.
Additional required properties:
compatible Must be one of the following, depending on the
model:
"ti,tsc2046"
"ti,ads7843"
"ti,ads7845"
"ti,ads7846"
"ti,ads7873"
interrupt-parent
interrupts An interrupt node describing the IRQ line the chip's
!PENIRQ pin is connected to.
vcc-supply A regulator node for the supply voltage.
Optional properties:
ti,vref-delay-usecs vref supply delay in usecs, 0 for
external vref (u16).
ti,vref-mv The VREF voltage, in millivolts (u16).
ti,keep-vref-on set to keep vref on for differential
measurements as well
ti,swap-xy swap x and y axis
ti,settle-delay-usec Settling time of the analog signals;
a function of Vcc and the capacitance
on the X/Y drivers. If set to non-zero,
two samples are taken with settle_delay
us apart, and the second one is used.
~150 uSec with 0.01uF caps (u16).
ti,penirq-recheck-delay-usecs If set to non-zero, after samples are
taken this delay is applied and penirq
is rechecked, to help avoid false
events. This value is affected by the
material used to build the touch layer
(u16).
ti,x-plate-ohms Resistance of the X-plate,
in Ohms (u16).
ti,y-plate-ohms Resistance of the Y-plate,
in Ohms (u16).
ti,x-min Minimum value on the X axis (u16).
ti,y-min Minimum value on the Y axis (u16).
ti,x-max Maximum value on the X axis (u16).
ti,y-max Minimum value on the Y axis (u16).
ti,pressure-min Minimum reported pressure value
(threshold) - u16.
ti,pressure-max Maximum reported pressure value (u16).
ti,debounce-max Max number of additional readings per
sample (u16).
ti,debounce-tol Tolerance used for filtering (u16).
ti,debounce-rep Additional consecutive good readings
required after the first two (u16).
ti,pendown-gpio-debounce Platform specific debounce time for the
pendown-gpio (u32).
pendown-gpio GPIO handle describing the pin the !PENIRQ
line is connected to.
linux,wakeup use any event on touchscreen as wakeup event.
Example for a TSC2046 chip connected to an McSPI controller of an OMAP SoC::
spi_controller {
tsc2046@0 {
reg = <0>; /* CS0 */
compatible = "ti,tsc2046";
interrupt-parent = <&gpio1>;
interrupts = <8 0>; /* BOOT6 / GPIO 8 */
spi-max-frequency = <1000000>;
pendown-gpio = <&gpio1 8 0>;
vcc-supply = <&reg_vcc3>;
ti,x-min = /bits/ 16 <0>;
ti,x-max = /bits/ 16 <8000>;
ti,y-min = /bits/ 16 <0>;
ti,y-max = /bits/ 16 <4800>;
ti,x-plate-ohms = /bits/ 16 <40>;
ti,pressure-max = /bits/ 16 <255>;
linux,wakeup;
};
};

44
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@ -0,0 +1,44 @@
* TI - TSC ADC (Touschscreen and analog digital converter)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Required properties:
- child "tsc"
ti,wires: Wires refer to application modes i.e. 4/5/8 wire touchscreen
support on the platform.
ti,x-plate-resistance: X plate resistance
ti,coordiante-readouts: The sequencer supports a total of 16
programmable steps each step is used to
read a single coordinate. A single
readout is enough but multiple reads can
increase the quality.
A value of 5 means, 5 reads for X, 5 for
Y and 2 for Z (always). This utilises 12
of the 16 software steps available. The
remaining 4 can be used by the ADC.
ti,wire-config: Different boards could have a different order for
connecting wires on touchscreen. We need to provide an
8 bit number where in the 1st four bits represent the
analog lines and the next 4 bits represent positive/
negative terminal on that input line. Notations to
represent the input lines and terminals resoectively
is as follows:
AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7.
XP = 0, XN = 1, YP = 2, YN = 3.
- child "adc"
ti,adc-channels: List of analog inputs available for ADC.
AIN0 = 0, AIN1 = 1 and so on till AIN7 = 7.
Example:
tscadc: tscadc@44e0d000 {
compatible = "ti,am3359-tscadc";
tsc {
ti,wires = <4>;
ti,x-plate-resistance = <200>;
ti,coordiante-readouts = <5>;
ti,wire-config = <0x00 0x11 0x22 0x33>;
};
adc {
ti,adc-channels = <4 5 6 7>;
};
}

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@ -0,0 +1,70 @@
* ARM System MMU Architecture Implementation
ARM SoCs may contain an implementation of the ARM System Memory
Management Unit Architecture, which can be used to provide 1 or 2 stages
of address translation to bus masters external to the CPU.
The SMMU may also raise interrupts in response to various fault
conditions.
** System MMU required properties:
- compatible : Should be one of:
"arm,smmu-v1"
"arm,smmu-v2"
"arm,mmu-400"
"arm,mmu-500"
depending on the particular implementation and/or the
version of the architecture implemented.
- reg : Base address and size of the SMMU.
- #global-interrupts : The number of global interrupts exposed by the
device.
- interrupts : Interrupt list, with the first #global-irqs entries
corresponding to the global interrupts and any
following entries corresponding to context interrupts,
specified in order of their indexing by the SMMU.
For SMMUv2 implementations, there must be exactly one
interrupt per context bank. In the case of a single,
combined interrupt, it must be listed multiple times.
- mmu-masters : A list of phandles to device nodes representing bus
masters for which the SMMU can provide a translation
and their corresponding StreamIDs (see example below).
Each device node linked from this list must have a
"#stream-id-cells" property, indicating the number of
StreamIDs associated with it.
** System MMU optional properties:
- smmu-parent : When multiple SMMUs are chained together, this
property can be used to provide a phandle to the
parent SMMU (that is the next SMMU on the path going
from the mmu-masters towards memory) node for this
SMMU.
Example:
smmu {
compatible = "arm,smmu-v1";
reg = <0xba5e0000 0x10000>;
#global-interrupts = <2>;
interrupts = <0 32 4>,
<0 33 4>,
<0 34 4>, /* This is the first context interrupt */
<0 35 4>,
<0 36 4>,
<0 37 4>;
/*
* Two DMA controllers, the first with two StreamIDs (0xd01d
* and 0xd01e) and the second with only one (0xd11c).
*/
mmu-masters = <&dma0 0xd01d 0xd01e>,
<&dma1 0xd11c>;
};

6
Documentation/devicetree/bindings/media/exynos-fimc-lite.txt
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@ -2,8 +2,10 @@ Exynos4x12/Exynos5 SoC series camera host interface (FIMC-LITE)
Required properties:
- compatible : should be "samsung,exynos4212-fimc-lite" for Exynos4212 and
Exynos4412 SoCs;
- compatible : should be one of:
"samsung,exynos4212-fimc-lite" for Exynos4212/4412 SoCs,
"samsung,exynos5250-fimc-lite" for Exynos5250 compatible
devices;
- reg : physical base address and size of the device memory mapped
registers;
- interrupts : should contain FIMC-LITE interrupt;

40
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@ -0,0 +1,40 @@
* Aptina 1/2.5-Inch 5Mp CMOS Digital Image Sensor
The Aptina MT9P031 is a 1/2.5-inch CMOS active pixel digital image sensor with
an active array size of 2592H x 1944V. It is programmable through a simple
two-wire serial interface.
Required Properties:
- compatible: value should be either one among the following
(a) "aptina,mt9p031" for mt9p031 sensor
(b) "aptina,mt9p031m" for mt9p031m sensor
- input-clock-frequency: Input clock frequency.
- pixel-clock-frequency: Pixel clock frequency.
Optional Properties:
- reset-gpios: Chip reset GPIO
For further reading on port node refer to
Documentation/devicetree/bindings/media/video-interfaces.txt.
Example:
i2c0@1c22000 {
...
...
mt9p031@5d {
compatible = "aptina,mt9p031";
reg = <0x5d>;
reset-gpios = <&gpio3 30 0>;
port {
mt9p031_1: endpoint {
input-clock-frequency = <6000000>;
pixel-clock-frequency = <96000000>;
};
};
};
...
};

44
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@ -0,0 +1,44 @@
* Texas Instruments TVP514x video decoder
The TVP5146/TVP5146m2/TVP5147/TVP5147m1 device is high quality, single-chip
digital video decoder that digitizes and decodes all popular baseband analog
video formats into digital video component. The tvp514x decoder supports analog-
to-digital (A/D) conversion of component RGB and YPbPr signals as well as A/D
conversion and decoding of NTSC, PAL and SECAM composite and S-video into
component YCbCr.
Required Properties :
- compatible : value should be either one among the following
(a) "ti,tvp5146" for tvp5146 decoder.
(b) "ti,tvp5146m2" for tvp5146m2 decoder.
(c) "ti,tvp5147" for tvp5147 decoder.
(d) "ti,tvp5147m1" for tvp5147m1 decoder.
- hsync-active: HSYNC Polarity configuration for endpoint.
- vsync-active: VSYNC Polarity configuration for endpoint.
- pclk-sample: Clock polarity of the endpoint.
For further reading on port node refer to Documentation/devicetree/bindings/
media/video-interfaces.txt.
Example:
i2c0@1c22000 {
...
...
tvp514x@5c {
compatible = "ti,tvp5146";
reg = <0x5c>;
port {
tvp514x_1: endpoint {
hsync-active = <1>;
vsync-active = <1>;
pclk-sample = <0>;
};
};
};
...
};

26
Documentation/devicetree/bindings/media/samsung-fimc.txt
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@ -127,22 +127,22 @@ Example:
};
};
};
};
/* MIPI CSI-2 bus IF sensor */
s5c73m3: sensor@0x1a {
compatible = "samsung,s5c73m3";
reg = <0x1a>;
vddio-supply = <...>;
/* MIPI CSI-2 bus IF sensor */
s5c73m3: sensor@0x1a {
compatible = "samsung,s5c73m3";
reg = <0x1a>;
vddio-supply = <...>;
clock-frequency = <24000000>;
clocks = <...>;
clock-names = "mclk";
clock-frequency = <24000000>;
clocks = <...>;
clock-names = "mclk";
port {
s5c73m3_1: endpoint {
data-lanes = <1 2 3 4>;
remote-endpoint = <&csis0_ep>;
port {
s5c73m3_1: endpoint {
data-lanes = <1 2 3 4>;
remote-endpoint = <&csis0_ep>;
};
};
};
};

4
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@ -5,8 +5,8 @@ Required properties:
- compatible : "samsung,s5pv210-csis" for S5PV210 (S5PC110),
"samsung,exynos4210-csis" for Exynos4210 (S5PC210),
"samsung,exynos4212-csis" for Exynos4212/Exynos4412
SoC series;
"samsung,exynos4212-csis" for Exynos4212/Exynos4412,
"samsung,exynos5250-csis" for Exynos5250;
- reg : offset and length of the register set for the device;
- interrupts : should contain MIPI CSIS interrupt; the format of the
interrupt specifier depends on the interrupt controller;

18
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@ -0,0 +1,18 @@
Bindings, specific for the sh_mobile_ceu_camera.c driver:
- compatible: Should be "renesas,sh-mobile-ceu"
- reg: register base and size
- interrupts: the interrupt number
- interrupt-parent: the interrupt controller
- renesas,max-width: maximum image width, supported on this SoC
- renesas,max-height: maximum image height, supported on this SoC
Example:
ceu0: ceu@0xfe910000 {
compatible = "renesas,sh-mobile-ceu";
reg = <0xfe910000 0xa0>;
interrupt-parent = <&intcs>;
interrupts = <0x880>;
renesas,max-width = <8188>;
renesas,max-height = <8188>;
};

30
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@ -0,0 +1,30 @@
* Meta Processor Binding
This binding specifies what properties must be available in the device tree
representation of a Meta Processor Core, which is the root node in the tree.
Required properties:
- compatible: Specifies the compatibility list for the Meta processor.
The type shall be <string> and the value shall include "img,meta".
Optional properties:
- clocks: Clock consumer specifiers as described in
Documentation/devicetree/bindings/clock/clock-bindings.txt
- clock-names: Clock consumer names as described in
Documentation/devicetree/bindings/clock/clock-bindings.txt.
Clocks are identified by name. Valid clocks are:
- "core": The Meta core clock from which the Meta timers are derived.
* Examples
/ {
compatible = "toumaz,tz1090", "img,meta";
clocks = <&meta_core_clk>;
clock-names = "core";
};

119
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@ -0,0 +1,119 @@
* Maxim MAX8998, National/TI LP3974 multi-function device
The Maxim MAX8998 is a multi-function device which includes voltage/current
regulators, real time clock, battery charging controller and several
other sub-blocks. It is interfaced using an I2C interface. Each sub-block
is addressed by the host system using different i2c slave address.
PMIC sub-block
--------------
The PMIC sub-block contains a number of voltage and current regulators,
with controllable parameters and dynamic voltage scaling capability.
In addition, it includes a real time clock and battery charging controller
as well. It is accessible at I2C address 0x66.
Required properties:
- compatible: Should be one of the following:
- "maxim,max8998" for Maxim MAX8998
- "national,lp3974" or "ti,lp3974" for National/TI LP3974.
- reg: Specifies the i2c slave address of the pmic block. It should be 0x66.
Optional properties:
- interrupt-parent: Specifies the phandle of the interrupt controller to which
the interrupts from MAX8998 are routed to.
- interrupts: Interrupt specifiers for two interrupt sources.
- First interrupt specifier is for main interrupt.
- Second interrupt specifier is for power-on/-off interrupt.
- max8998,pmic-buck1-dvs-gpios: GPIO specifiers for two host gpios used
for buck 1 dvs. The format of the gpio specifier depends on the gpio
controller.
- max8998,pmic-buck2-dvs-gpio: GPIO specifier for host gpio used
for buck 2 dvs. The format of the gpio specifier depends on the gpio
controller.
- max8998,pmic-buck1-default-dvs-idx: Default voltage setting selected from
the possible 4 options selectable by the dvs gpios. The value of this
property should be 0, 1, 2 or 3. If not specified or out of range,
a default value of 0 is taken.
- max8998,pmic-buck2-default-dvs-idx: Default voltage setting selected from
the possible 2 options selectable by the dvs gpios. The value of this
property should be 0 or 1. If not specified or out of range, a default
value of 0 is taken.
- max8998,pmic-buck-voltage-lock: If present, disallows changing of
preprogrammed buck dvfs voltages.
Additional properties required if max8998,pmic-buck1-dvs-gpios is defined:
- max8998,pmic-buck1-dvs-voltage: An array of 4 voltage values in microvolts
for buck1 regulator that can be selected using dvs gpio.
Additional properties required if max8998,pmic-buck2-dvs-gpio is defined:
- max8998,pmic-buck2-dvs-voltage: An array of 2 voltage values in microvolts
for buck2 regulator that can be selected using dvs gpio.
Regulators: All the regulators of MAX8998 to be instantiated shall be
listed in a child node named 'regulators'. Each regulator is represented
by a child node of the 'regulators' node.
regulator-name {
/* standard regulator bindings here */
};
Following regulators of the MAX8998 PMIC block are supported. Note that
the 'n' in regulator name, as in LDOn or BUCKn, represents the LDO or BUCK
number as described in MAX8998 datasheet.
- LDOn
- valid values for n are 2 to 17
- Example: LDO2, LDO10, LDO17
- BUCKn
- valid values for n are 1 to 4.
- Example: BUCK1, BUCK2, BUCK3, BUCK4
- ENVICHG: Battery Charging Current Monitor Output. This is a fixed
voltage type regulator
- ESAFEOUT1: (ldo19)
- ESAFEOUT2: (ld020)
Standard regulator bindings are used inside regulator subnodes. Check
Documentation/devicetree/bindings/regulator/regulator.txt
for more details.
Example:
pmic@66 {
compatible = "maxim,max8998-pmic";
reg = <0x66>;
interrupt-parent = <&wakeup_eint>;
interrupts = <4 0>, <3 0>;
/* Buck 1 DVS settings */
max8998,pmic-buck1-default-dvs-idx = <0>;
max8998,pmic-buck1-dvs-gpios = <&gpx0 0 1 0 0>, /* SET1 */
<&gpx0 1 1 0 0>; /* SET2 */
max8998,pmic-buck1-dvs-voltage = <1350000>, <1300000>,
<1000000>, <950000>;
/* Buck 2 DVS settings */
max8998,pmic-buck2-default-dvs-idx = <0>;
max8998,pmic-buck2-dvs-gpio = <&gpx0 0 3 0 0>; /* SET3 */
max8998,pmic-buck2-dvs-voltage = <1350000>, <1300000>;
/* Regulators to instantiate */
regulators {
ldo2_reg: LDO2 {
regulator-name = "VDD_ALIVE_1.1V";
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-always-on;
};
buck1_reg: BUCK1 {
regulator-name = "VDD_ARM_1.2V";
regulator-min-microvolt = <950000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-boot-on;
};
};
};

28
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@ -0,0 +1,28 @@
Texas Instruments TWL family (twl4030) reset and power management module
The power management module inside the TWL family provides several facilities
to control the power resources, including power scripts. For now, the
binding only supports the complete shutdown of the system after poweroff.
Required properties:
- compatible : must be "ti,twl4030-power"
Optional properties:
- ti,use_poweroff: With this flag, the chip will initiates an ACTIVE-to-OFF or
SLEEP-to-OFF transition when the system poweroffs.
Example:
&i2c1 {
clock-frequency = <2600000>;
twl: twl@48 {
reg = <0x48>;
interrupts = <7>; /* SYS_NIRQ cascaded to intc */
interrupt-parent = <&intc>;
twl_power: power {
compatible = "ti,twl4030-power";
ti,use_poweroff;
};
};
};

1
Documentation/devicetree/bindings/mmc/mmc.txt
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@ -28,6 +28,7 @@ Optional properties:
- cap-mmc-highspeed: MMC high-speed timing is supported
- cap-power-off-card: powering off the card is safe
- cap-sdio-irq: enable SDIO IRQ signalling on this interface
- full-pwr-cycle: full power cycle of the card is supported
*NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line
polarity properties, we have to fix the meaning of the "normal" and "inverted"

23
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@ -0,0 +1,23 @@
* Rockchip specific extensions to the Synopsis Designware Mobile
Storage Host Controller
The Synopsis designware mobile storage host controller is used to interface
a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
differences between the core Synopsis dw mshc controller properties described
by synopsis-dw-mshc.txt and the properties used by the Rockchip specific
extensions to the Synopsis Designware Mobile Storage Host Controller.
Required Properties:
* compatible: should be
- "rockchip,rk2928-dw-mshc": for Rockchip RK2928 and following
Example:
rkdwmmc0@12200000 {
compatible = "rockchip,rk2928-dw-mshc";
reg = <0x12200000 0x1000>;
interrupts = <0 75 0>;
#address-cells = <1>;
#size-cells = <0>;
};

20
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@ -39,6 +39,19 @@ Required Properties:
Optional properties:
* clocks: from common clock binding: handle to biu and ciu clocks for the
bus interface unit clock and the card interface unit clock.
* clock-names: from common clock binding: Shall be "biu" and "ciu".
If the biu clock is missing we'll simply skip enabling it. If the
ciu clock is missing we'll just assume that the clock is running at
clock-frequency. It is an error to omit both the ciu clock and the
clock-frequency.
* clock-frequency: should be the frequency (in Hz) of the ciu clock. If this
is specified and the ciu clock is specified then we'll try to set the ciu
clock to this at probe time.
* num-slots: specifies the number of slots supported by the controller.
The number of physical slots actually used could be equal or less than the
value specified by num-slots. If this property is not specified, the value
@ -55,6 +68,9 @@ Optional properties:
* broken-cd: as documented in mmc core bindings.
* vmmc-supply: The phandle to the regulator to use for vmmc. If this is
specified we'll defer probe until we can find this regulator.
Aliases:
- All the MSHC controller nodes should be represented in the aliases node using
@ -67,6 +83,8 @@ board specific portions as listed below.
dwmmc0@12200000 {
compatible = "snps,dw-mshc";
clocks = <&clock 351>, <&clock 132>;
clock-names = "biu", "ciu";
reg = <0x12200000 0x1000>;
interrupts = <0 75 0>;
#address-cells = <1>;
@ -74,11 +92,13 @@ board specific portions as listed below.
};
dwmmc0@12200000 {
clock-frequency = <400000000>;
num-slots = <1>;
supports-highspeed;
broken-cd;
fifo-depth = <0x80>;
card-detect-delay = <200>;
vmmc-supply = <&buck8>;
slot@0 {
reg = <0>;

22
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@ -0,0 +1,22 @@
* Allwinner EMAC ethernet controller
Required properties:
- compatible: should be "allwinner,sun4i-emac".
- reg: address and length of the register set for the device.
- interrupts: interrupt for the device
- phy: A phandle to a phy node defining the PHY address (as the reg
property, a single integer).
- clocks: A phandle to the reference clock for this device
Optional properties:
- (local-)mac-address: mac address to be used by this driver
Example:
emac: ethernet@01c0b000 {
compatible = "allwinner,sun4i-emac";
reg = <0x01c0b000 0x1000>;
interrupts = <55>;
clocks = <&ahb_gates 17>;
phy = <&phy0>;
};

26
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@ -0,0 +1,26 @@
* Allwinner A10 MDIO Ethernet Controller interface
Required properties:
- compatible: should be "allwinner,sun4i-mdio".
- reg: address and length of the register set for the device.
Optional properties:
- phy-supply: phandle to a regulator if the PHY needs one
Example at the SoC level:
mdio@01c0b080 {
compatible = "allwinner,sun4i-mdio";
reg = <0x01c0b080 0x14>;
#address-cells = <1>;
#size-cells = <0>;
};
And at the board level:
mdio@01c0b080 {
phy-supply = <&reg_emac_3v3>;
phy0: ethernet-phy@0 {
reg = <0>;
};
};

38
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@ -0,0 +1,38 @@
* Synopsys ARC EMAC 10/100 Ethernet driver (EMAC)
Required properties:
- compatible: Should be "snps,arc-emac"
- reg: Address and length of the register set for the device
- interrupts: Should contain the EMAC interrupts
- clock-frequency: CPU frequency. It is needed to calculate and set polling
period of EMAC.
- max-speed: Maximum supported data-rate in Mbit/s. In some HW configurations
bandwidth of external memory controller might be a limiting factor. That's why
it's required to specify which data-rate is supported on current SoC or FPGA.
For example if only 10 Mbit/s is supported (10BASE-T) set "10". If 100 Mbit/s is
supported (100BASE-TX) set "100".
- phy: PHY device attached to the EMAC via MDIO bus
Child nodes of the driver are the individual PHY devices connected to the
MDIO bus. They must have a "reg" property given the PHY address on the MDIO bus.
Optional properties:
- mac-address: 6 bytes, mac address
Examples:
ethernet@c0fc2000 {
compatible = "snps,arc-emac";
reg = <0xc0fc2000 0x3c>;
interrupts = <6>;
mac-address = [ 00 11 22 33 44 55 ];
clock-frequency = <80000000>;
max-speed = <100>;
phy = <&phy0>;
#address-cells = <1>;
#size-cells = <0>;
phy0: ethernet-phy@0 {
reg = <1>;
};
};

2
Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
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@ -16,6 +16,8 @@ Optional properties:
- clock-frequency : The oscillator frequency driving the flexcan device
- xceiver-supply: Regulator that powers the CAN transceiver
Example:
can@1c000 {

6
Documentation/devicetree/bindings/net/cpsw.txt
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@ -28,6 +28,8 @@ Optional properties:
Slave Properties:
Required properties:
- phy_id : Specifies slave phy id
- phy-mode : The interface between the SoC and the PHY (a string
that of_get_phy_mode() can understand)
- mac-address : Specifies slave MAC address
Optional properties:
@ -58,11 +60,13 @@ Examples:
cpts_clock_shift = <29>;
cpsw_emac0: slave@0 {
phy_id = <&davinci_mdio>, <0>;
phy-mode = "rgmii-txid";
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
};
cpsw_emac1: slave@1 {
phy_id = <&davinci_mdio>, <1>;
phy-mode = "rgmii-txid";
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
};
@ -84,11 +88,13 @@ Examples:
cpts_clock_shift = <29>;
cpsw_emac0: slave@0 {
phy_id = <&davinci_mdio>, <0>;
phy-mode = "rgmii-txid";
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
};
cpsw_emac1: slave@1 {
phy_id = <&davinci_mdio>, <1>;
phy-mode = "rgmii-txid";
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
};

26
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@ -0,0 +1,26 @@
Davicom DM9000 Fast Ethernet controller
Required properties:
- compatible = "davicom,dm9000";
- reg : physical addresses and sizes of registers, must contain 2 entries:
first entry : address register,
second entry : data register.
- interrupt-parent : interrupt controller to which the device is connected
- interrupts : interrupt specifier specific to interrupt controller
Optional properties:
- local-mac-address : A bytestring of 6 bytes specifying Ethernet MAC address
to use (from firmware or bootloader)
- davicom,no-eeprom : Configuration EEPROM is not available
- davicom,ext-phy : Use external PHY
Example:
ethernet@18000000 {
compatible = "davicom,dm9000";
reg = <0x18000000 0x2 0x18000004 0x2>;
interrupt-parent = <&gpn>;
interrupts = <7 4>;
local-mac-address = [00 00 de ad be ef];
davicom,no-eeprom;
};

85
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@ -0,0 +1,85 @@
Marvell Orion/Discovery ethernet controller
=============================================
The Marvell Discovery ethernet controller can be found on Marvell Orion SoCs
(Kirkwood, Dove, Orion5x, and Discovery Innovation) and as part of Marvell
Discovery system controller chips (mv64[345]60).
The Discovery ethernet controller is described with two levels of nodes. The
first level describes the ethernet controller itself and the second level
describes up to 3 ethernet port nodes within that controller. The reason for
the multiple levels is that the port registers are interleaved within a single
set of controller registers. Each port node describes port-specific properties.
Note: The above separation is only true for Discovery system controllers.
For Orion SoCs we stick to the separation, although there each controller has
only one port associated. Multiple ports are implemented as multiple single-port
controllers. As Kirkwood has some issues with proper initialization after reset,
an extra compatible string is added for it.
* Ethernet controller node
Required controller properties:
- #address-cells: shall be 1.
- #size-cells: shall be 0.
- compatible: shall be one of "marvell,orion-eth", "marvell,kirkwood-eth".
- reg: address and length of the controller registers.
Optional controller properties:
- clocks: phandle reference to the controller clock.
- marvell,tx-checksum-limit: max tx packet size for hardware checksum.
* Ethernet port node
Required port properties:
- device_type: shall be "network".
- compatible: shall be one of "marvell,orion-eth-port",
"marvell,kirkwood-eth-port".
- reg: port number relative to ethernet controller, shall be 0, 1, or 2.
- interrupts: port interrupt.
- local-mac-address: 6 bytes MAC address.
Optional port properties:
- marvell,tx-queue-size: size of the transmit ring buffer.
- marvell,tx-sram-addr: address of transmit descriptor buffer located in SRAM.
- marvell,tx-sram-size: size of transmit descriptor buffer located in SRAM.
- marvell,rx-queue-size: size of the receive ring buffer.
- marvell,rx-sram-addr: address of receive descriptor buffer located in SRAM.
- marvell,rx-sram-size: size of receive descriptor buffer located in SRAM.
and
- phy-handle: phandle reference to ethernet PHY.
or
- speed: port speed if no PHY connected.
- duplex: port mode if no PHY connected.
* Node example:
mdio-bus {
...
ethphy: ethernet-phy@8 {
device_type = "ethernet-phy";
...
};
};
eth: ethernet-controller@72000 {
compatible = "marvell,orion-eth";
#address-cells = <1>;
#size-cells = <0>;
reg = <0x72000 0x2000>;
clocks = <&gate_clk 2>;
marvell,tx-checksum-limit = <1600>;
ethernet@0 {
device_type = "network";
compatible = "marvell,orion-eth-port";
reg = <0>;
interrupts = <29>;
phy-handle = <&ethphy>;
local-mac-address = [00 00 00 00 00 00];
};
};

9
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@ -0,0 +1,9 @@
Micrel KS8851 Ethernet mac
Required properties:
- compatible = "micrel,ks8851-ml" of parallel interface
- reg : 2 physical address and size of registers for data and command
- interrupts : interrupt connection
Optional properties:
- local-mac-address : Ethernet mac address to use

10
Documentation/devicetree/bindings/net/stmmac.txt
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@ -12,6 +12,16 @@ Required properties:
property
- phy-mode: String, operation mode of the PHY interface.
Supported values are: "mii", "rmii", "gmii", "rgmii".
- snps,phy-addr phy address to connect to.
- snps,reset-gpio gpio number for phy reset.
- snps,reset-active-low boolean flag to indicate if phy reset is active low.
- snps,reset-delays-us is triplet of delays
The 1st cell is reset pre-delay in micro seconds.
The 2nd cell is reset pulse in micro seconds.
The 3rd cell is reset post-delay in micro seconds.
- snps,pbl Programmable Burst Length
- snps,fixed-burst Program the DMA to use the fixed burst mode
- snps,mixed-burst Program the DMA to use the mixed burst mode
Optional properties:
- mac-address: 6 bytes, mac address

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@ -0,0 +1,20 @@
* VIA Velocity 10/100/1000 Network Controller
Required properties:
- compatible : Should be "via,velocity-vt6110"
- reg : Address and length of the io space
- interrupts : Should contain the controller interrupt line
Optional properties:
- no-eeprom : PCI network cards use an external EEPROM to store data. Embedded
devices quite often set this data in uboot and do not provide an eeprom.
Specify this option if you have no external eeprom.
Examples:
eth0@d8004000 {
compatible = "via,velocity-vt6110";
reg = <0xd8004000 0x400>;
interrupts = <10>;
no-eeprom;
};

44
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@ -0,0 +1,44 @@
Binding for TI/National Semiconductor LP8727 Charger
Required properties:
- compatible: "ti,lp8727"
- reg: I2C slave address 27h
Optional properties:
- interrupt-parent: interrupt controller node (see interrupt binding[0])
- interrupts: interrupt specifier (see interrupt binding[0])
- debounce-ms: interrupt debounce time. (u32)
AC and USB charging parameters
- charger-type: "ac" or "usb" (string)
- eoc-level: value of 'enum lp8727_eoc_level' (u8)
- charging-current: value of 'enum lp8727_ichg' (u8)
[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
Example)
lp8727@27 {
compatible = "ti,lp8727";
reg = <0x27>;
/* GPIO 134 is used for LP8728 interrupt pin */
interrupt-parent = <&gpio5>; /* base = 128 */
interrupts = <6 0x2>; /* offset = 6, falling edge type */
debounce-ms = <300>;
/* AC charger: 5% EOC and 500mA charging current */
ac {
charger-type = "ac";
eoc-level = /bits/ 8 <0>;
charging-current = /bits/ 8 <4>;
};
/* USB charger: 10% EOC and 400mA charging current */
usb {
charger-type = "usb";
eoc-level = /bits/ 8 <1>;
charging-current = /bits/ 8 <2>;
};
};

27
Documentation/devicetree/bindings/pwm/nxp,pca9685-pwm.txt Normal file
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@ -0,0 +1,27 @@
NXP PCA9685 16-channel 12-bit PWM LED controller
================================================
Required properties:
- compatible: "nxp,pca9685-pwm"
- #pwm-cells: should be 2. The first cell specifies the per-chip index
of the PWM to use and the second cell is the period in nanoseconds.
The index 16 is the ALLCALL channel, that sets all PWM channels at the same
time.
Optional properties:
- invert (bool): boolean to enable inverted logic
- open-drain (bool): boolean to configure outputs with open-drain structure;
if omitted use totem-pole structure
Example:
For LEDs that are directly connected to the PCA, the following setting is
applicable:
pca: pca@41 {
compatible = "nxp,pca9685-pwm";
#pwm-cells = <2>;
reg = <0x41>;
invert;
open-drain;
};

2
Documentation/devicetree/bindings/regulator/max8997-regulator.txt
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@ -1,6 +1,6 @@
* Maxim MAX8997 Voltage and Current Regulator
The Maxim MAX8997 is a multi-function device which includes volatage and
The Maxim MAX8997 is a multi-function device which includes voltage and
current regulators, rtc, charger controller and other sub-blocks. It is
interfaced to the host controller using a i2c interface. Each sub-block is
addressed by the host system using different i2c slave address. This document

14
Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt
View File

@ -1,6 +1,6 @@
* Samsung S5M8767 Voltage and Current Regulator
The Samsung S5M8767 is a multi-function device which includes volatage and
The Samsung S5M8767 is a multi-function device which includes voltage and
current regulators, rtc, charger controller and other sub-blocks. It is
interfaced to the host controller using a i2c interface. Each sub-block is
addressed by the host system using different i2c slave address. This document
@ -103,13 +103,13 @@ Example:
s5m8767,pmic-buck-default-dvs-idx = <0>;
s5m8767,pmic-buck-dvs-gpios = <&gpx0 0 1 0 0>, /* DVS1 */
<&gpx0 1 1 0 0>, /* DVS2 */
<&gpx0 2 1 0 0>; /* DVS3 */
s5m8767,pmic-buck-dvs-gpios = <&gpx0 0 0>, /* DVS1 */
<&gpx0 1 0>, /* DVS2 */
<&gpx0 2 0>; /* DVS3 */
s5m8767,pmic-buck-ds-gpios = <&gpx2 3 1 0 0>, /* SET1 */
<&gpx2 4 1 0 0>, /* SET2 */
<&gpx2 5 1 0 0>; /* SET3 */
s5m8767,pmic-buck-ds-gpios = <&gpx2 3 0>, /* SET1 */
<&gpx2 4 0>, /* SET2 */
<&gpx2 5 0>; /* SET3 */
s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>,
<1250000>, <1200000>,

26
Documentation/devicetree/bindings/regulator/twl-regulator.txt
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@ -18,20 +18,20 @@ For twl6030 regulators/LDOs
- "ti,twl6030-vdd1" for VDD1 SMPS
- "ti,twl6030-vdd2" for VDD2 SMPS
- "ti,twl6030-vdd3" for VDD3 SMPS
For twl6025 regulators/LDOs
For twl6032 regulators/LDOs
- compatible:
- "ti,twl6025-ldo1" for LDO1 LDO
- "ti,twl6025-ldo2" for LDO2 LDO
- "ti,twl6025-ldo3" for LDO3 LDO
- "ti,twl6025-ldo4" for LDO4 LDO
- "ti,twl6025-ldo5" for LDO5 LDO
- "ti,twl6025-ldo6" for LDO6 LDO
- "ti,twl6025-ldo7" for LDO7 LDO
- "ti,twl6025-ldoln" for LDOLN LDO
- "ti,twl6025-ldousb" for LDOUSB LDO
- "ti,twl6025-smps3" for SMPS3 SMPS
- "ti,twl6025-smps4" for SMPS4 SMPS
- "ti,twl6025-vio" for VIO SMPS
- "ti,twl6032-ldo1" for LDO1 LDO
- "ti,twl6032-ldo2" for LDO2 LDO
- "ti,twl6032-ldo3" for LDO3 LDO
- "ti,twl6032-ldo4" for LDO4 LDO
- "ti,twl6032-ldo5" for LDO5 LDO
- "ti,twl6032-ldo6" for LDO6 LDO
- "ti,twl6032-ldo7" for LDO7 LDO
- "ti,twl6032-ldoln" for LDOLN LDO
- "ti,twl6032-ldousb" for LDOUSB LDO
- "ti,twl6032-smps3" for SMPS3 SMPS
- "ti,twl6032-smps4" for SMPS4 SMPS
- "ti,twl6032-vio" for VIO SMPS
For twl4030 regulators/LDOs
- compatible:
- "ti,twl4030-vaux1" for VAUX1 LDO

21
drivers/staging/ti-soc-thermal/ti_soc_thermal.txt → Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt
View File

@ -17,8 +17,9 @@ Required properties:
- interrupts : this entry should indicate which interrupt line
the talert signal is routed to;
Specific:
- ti,tshut-gpio : this entry should be used to inform which GPIO
line the tshut signal is routed to;
- gpios : this entry should be used to inform which GPIO
line the tshut signal is routed to. The informed GPIO will
be treated as an IRQ;
- regs : this entry must also be specified and it is specific
to each bandgap version, because the mapping may change from
soc to soc, apart of depending on available features.
@ -37,7 +38,7 @@ bandgap {
0x4a002378 0x18>;
compatible = "ti,omap4460-bandgap";
interrupts = <0 126 4>; /* talert */
ti,tshut-gpio = <86>;
gpios = <&gpio3 22 0>; /* tshut */
};
OMAP4470:
@ -47,7 +48,7 @@ bandgap {
0x4a002378 0x18>;
compatible = "ti,omap4470-bandgap";
interrupts = <0 126 4>; /* talert */
ti,tshut-gpio = <86>;
gpios = <&gpio3 22 0>; /* tshut */
};
OMAP5430:
@ -59,3 +60,15 @@ bandgap {
compatible = "ti,omap5430-bandgap";
interrupts = <0 126 4>; /* talert */
};
DRA752:
bandgap {
reg = <0x4a0021e0 0xc
0x4a00232c 0xc
0x4a002380 0x2c
0x4a0023C0 0x3c
0x4a002564 0x8
0x4a002574 0x50>;
compatible = "ti,dra752-bandgap";
interrupts = <0 126 4>; /* talert */
};

33
Documentation/devicetree/bindings/timer/lsi,zevio-timer.txt Normal file
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@ -0,0 +1,33 @@
TI-NSPIRE timer
Required properties:
- compatible : should be "lsi,zevio-timer".
- reg : The physical base address and size of the timer (always first).
- clocks: phandle to the source clock.
Optional properties:
- interrupts : The interrupt number of the first timer.
- reg : The interrupt acknowledgement registers
(always after timer base address)
If any of the optional properties are not given, the timer is added as a
clock-source only.
Example:
timer {
compatible = "lsi,zevio-timer";
reg = <0x900D0000 0x1000>, <0x900A0020 0x8>;
interrupts = <19>;
clocks = <&timer_clk>;
};
Example (no clock-events):
timer {
compatible = "lsi,zevio-timer";
reg = <0x900D0000 0x1000>;
clocks = <&timer_clk>;
};

17
Documentation/devicetree/bindings/timer/marvell,orion-timer.txt Normal file
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@ -0,0 +1,17 @@
Marvell Orion SoC timer
Required properties:
- compatible: shall be "marvell,orion-timer"
- reg: base address of the timer register starting with TIMERS CONTROL register
- interrupt-parent: phandle of the bridge interrupt controller
- interrupts: should contain the interrupts for Timer0 and Timer1
- clocks: phandle of timer reference clock (tclk)
Example:
timer: timer {
compatible = "marvell,orion-timer";
reg = <0x20300 0x20>;
interrupt-parent = <&bridge_intc>;
interrupts = <1>, <2>;
clocks = <&core_clk 0>;
};

2
Documentation/devicetree/bindings/usb/twlxxxx-usb.txt
View File

@ -8,7 +8,7 @@ TWL6030 USB COMPARATOR
usb interrupt number that raises VBUS interrupts when the controller has to
act as device
- usb-supply : phandle to the regulator device tree node. It should be vusb
if it is twl6030 or ldousb if it is twl6025 subclass.
if it is twl6030 or ldousb if it is twl6032 subclass.
twl6030-usb {
compatible = "ti,twl6030-usb";

4
Documentation/devicetree/bindings/vendor-prefixes.txt
View File

@ -18,6 +18,7 @@ chrp Common Hardware Reference Platform
cirrus Cirrus Logic, Inc.
cortina Cortina Systems, Inc.
dallas Maxim Integrated Products (formerly Dallas Semiconductor)
davicom DAVICOM Semiconductor, Inc.
denx Denx Software Engineering
emmicro EM Microelectronic
epson Seiko Epson Corp.
@ -25,6 +26,7 @@ est ESTeem Wireless Modems
fsl Freescale Semiconductor
GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc.
gef GE Fanuc Intelligent Platforms Embedded Systems, Inc.
hisilicon Hisilicon Limited.
hp Hewlett Packard
ibm International Business Machines (IBM)
idt Integrated Device Technologies, Inc.
@ -42,6 +44,7 @@ nxp NXP Semiconductors
onnn ON Semiconductor Corp.
picochip Picochip Ltd
powervr PowerVR (deprecated, use img)
qca Qualcomm Atheros, Inc.
qcom Qualcomm, Inc.
ralink Mediatek/Ralink Technology Corp.
ramtron Ramtron International
@ -58,6 +61,7 @@ snps Synopsys, Inc.
st STMicroelectronics
ste ST-Ericsson
stericsson ST-Ericsson
toumaz Toumaz
ti Texas Instruments
toshiba Toshiba Corporation
v3 V3 Semiconductor

1
Documentation/devicetree/bindings/video/display-timing.txt
View File

@ -34,6 +34,7 @@ optional properties:
- ignored = ignored
- interlaced (bool): boolean to enable interlaced mode
- doublescan (bool): boolean to enable doublescan mode
- doubleclk (bool): boolean to enable doubleclock mode
All the optional properties that are not bool follow the following logic:
<1>: high active

13
Documentation/devicetree/bindings/video/exynos_hdmi.txt
View File

@ -1,22 +1,23 @@
Device-Tree bindings for drm hdmi driver
Required properties:
- compatible: value should be "samsung,exynos5-hdmi".
- compatible: value should be one among the following:
1) "samsung,exynos5-hdmi" <DEPRECATED>
2) "samsung,exynos4210-hdmi"
3) "samsung,exynos4212-hdmi"
- reg: physical base address of the hdmi and length of memory mapped
region.
- interrupts: interrupt number to the cpu.
- hpd-gpio: following information about the hotplug gpio pin.
a) phandle of the gpio controller node.
b) pin number within the gpio controller.
c) pin function mode.
d) optional flags and pull up/down.
e) drive strength.
c) optional flags and pull up/down.
Example:
hdmi {
compatible = "samsung,exynos5-hdmi";
compatible = "samsung,exynos4212-hdmi";
reg = <0x14530000 0x100000>;
interrupts = <0 95 0>;
hpd-gpio = <&gpx3 7 0xf 1 3>;
hpd-gpio = <&gpx3 7 1>;
};

7
Documentation/devicetree/bindings/video/exynos_hdmiddc.txt
View File

@ -1,12 +1,15 @@
Device-Tree bindings for hdmiddc driver
Required properties:
- compatible: value should be "samsung,exynos5-hdmiddc".
- compatible: value should be one of the following
1) "samsung,exynos5-hdmiddc" <DEPRECATED>
2) "samsung,exynos4210-hdmiddc"
- reg: I2C address of the hdmiddc device.
Example:
hdmiddc {
compatible = "samsung,exynos5-hdmiddc";
compatible = "samsung,exynos4210-hdmiddc";
reg = <0x50>;
};

7
Documentation/devicetree/bindings/video/exynos_hdmiphy.txt
View File

@ -1,12 +1,15 @@
Device-Tree bindings for hdmiphy driver
Required properties:
- compatible: value should be "samsung,exynos5-hdmiphy".
- compatible: value should be one of the following:
1) "samsung,exynos5-hdmiphy" <DEPRECATED>
2) "samsung,exynos4210-hdmiphy".
3) "samsung,exynos4212-hdmiphy".
- reg: I2C address of the hdmiphy device.
Example:
hdmiphy {
compatible = "samsung,exynos5-hdmiphy";
compatible = "samsung,exynos4210-hdmiphy";
reg = <0x38>;
};

9
Documentation/devicetree/bindings/video/exynos_mixer.txt
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@ -1,7 +1,12 @@
Device-Tree bindings for mixer driver
Required properties:
- compatible: value should be "samsung,exynos5-mixer".
- compatible: value should be one of the following:
1) "samsung,exynos5-mixer" <DEPRECATED>
2) "samsung,exynos4210-mixer"
3) "samsung,exynos5250-mixer"
4) "samsung,exynos5420-mixer"
- reg: physical base address of the mixer and length of memory mapped
region.
- interrupts: interrupt number to the cpu.
@ -9,7 +14,7 @@ Required properties:
Example:
mixer {
compatible = "samsung,exynos5-mixer";
compatible = "samsung,exynos5250-mixer";
reg = <0x14450000 0x10000>;
interrupts = <0 94 0>;
};

51
Documentation/devicetree/bindings/video/fsl,imx-fb.txt Normal file
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@ -0,0 +1,51 @@
Freescale imx21 Framebuffer
This framebuffer driver supports devices imx1, imx21, imx25, and imx27.
Required properties:
- compatible : "fsl,<chip>-fb", chip should be imx1 or imx21
- reg : Should contain 1 register ranges(address and length)
- interrupts : One interrupt of the fb dev
Required nodes:
- display: Phandle to a display node as described in
Documentation/devicetree/bindings/video/display-timing.txt
Additional, the display node has to define properties:
- bits-per-pixel: Bits per pixel
- fsl,pcr: LCDC PCR value
Optional properties:
- fsl,dmacr: DMA Control Register value. This is optional. By default, the
register is not modified as recommended by the datasheet.
- fsl,lscr1: LCDC Sharp Configuration Register value.
Example:
imxfb: fb@10021000 {
compatible = "fsl,imx21-fb";
interrupts = <61>;
reg = <0x10021000 0x1000>;
display = <&display0>;
};
...
display0: display0 {
model = "Primeview-PD050VL1";
native-mode = <&timing_disp0>;
bits-per-pixel = <16>;
fsl,pcr = <0xf0c88080>; /* non-standard but required */
display-timings {
timing_disp0: 640x480 {
hactive = <640>;
vactive = <480>;
hback-porch = <112>;
hfront-porch = <36>;
hsync-len = <32>;
vback-porch = <33>;
vfront-porch = <33>;
vsync-len = <2>;
clock-frequency = <25000000>;
};
};
};

10
Documentation/devicetree/bindings/video/ssd1307fb.txt
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@ -1,13 +1,17 @@
* Solomon SSD1307 Framebuffer Driver
Required properties:
- compatible: Should be "solomon,ssd1307fb-<bus>". The only supported bus for
now is i2c.
- compatible: Should be "solomon,<chip>fb-<bus>". The only supported bus for
now is i2c, and the supported chips are ssd1306 and ssd1307.
- reg: Should contain address of the controller on the I2C bus. Most likely
0x3c or 0x3d
- pwm: Should contain the pwm to use according to the OF device tree PWM
specification [0]
specification [0]. Only required for the ssd1307.
- reset-gpios: Should contain the GPIO used to reset the OLED display
- solomon,height: Height in pixel of the screen driven by the controller
- solomon,width: Width in pixel of the screen driven by the controller
- solomon,page-offset: Offset of pages (band of 8 pixels) that the screen is
mapped to.
Optional properties:
- reset-active-low: Is the reset gpio is active on physical low?

5
Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt
View File

@ -5,9 +5,14 @@ Required properties:
- compatible : should be "brcm,bcm2835-pm-wdt"
- reg : Specifies base physical address and size of the registers.
Optional properties:
- timeout-sec : Contains the watchdog timeout in seconds
Example:
watchdog {
compatible = "brcm,bcm2835-pm-wdt";
reg = <0x7e100000 0x28>;
timeout-sec = <10>;
};

14
Documentation/fb/uvesafb.txt
View File

@ -81,17 +81,11 @@ pmipal Use the protected mode interface for palette changes.
mtrr:n Setup memory type range registers for the framebuffer
where n:
0 - disabled (equivalent to nomtrr) (default)
1 - uncachable
2 - write-back
3 - write-combining
4 - write-through
0 - disabled (equivalent to nomtrr)
3 - write-combining (default)
If you see the following in dmesg, choose the type that matches
the old one. In this example, use "mtrr:2".
...
mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining
...
Values other than 0 and 3 will result in a warning and will be
treated just like 3.
nomtrr Do not use memory type range registers.

307
Documentation/filesystems/xfs.txt
View File

@ -18,6 +18,8 @@ Mount Options
=============
When mounting an XFS filesystem, the following options are accepted.
For boolean mount options, the names with the (*) suffix is the
default behaviour.
allocsize=size
Sets the buffered I/O end-of-file preallocation size when
@ -25,97 +27,128 @@ When mounting an XFS filesystem, the following options are accepted.
Valid values for this option are page size (typically 4KiB)
through to 1GiB, inclusive, in power-of-2 increments.
attr2/noattr2
The options enable/disable (default is disabled for backward
compatibility on-disk) an "opportunistic" improvement to be
made in the way inline extended attributes are stored on-disk.
When the new form is used for the first time (by setting or
removing extended attributes) the on-disk superblock feature
bit field will be updated to reflect this format being in use.
The default behaviour is for dynamic end-of-file
preallocation size, which uses a set of heuristics to
optimise the preallocation size based on the current
allocation patterns within the file and the access patterns
to the file. Specifying a fixed allocsize value turns off
the dynamic behaviour.
attr2
noattr2
The options enable/disable an "opportunistic" improvement to
be made in the way inline extended attributes are stored
on-disk. When the new form is used for the first time when
attr2 is selected (either when setting or removing extended
attributes) the on-disk superblock feature bit field will be
updated to reflect this format being in use.
The default behaviour is determined by the on-disk feature
bit indicating that attr2 behaviour is active. If either
mount option it set, then that becomes the new default used
by the filesystem.
CRC enabled filesystems always use the attr2 format, and so
will reject the noattr2 mount option if it is set.
barrier
Enables the use of block layer write barriers for writes into
the journal and unwritten extent conversion. This allows for
drive level write caching to be enabled, for devices that
support write barriers.
barrier (*)
nobarrier
Enables/disables the use of block layer write barriers for
writes into the journal and for data integrity operations.
This allows for drive level write caching to be enabled, for
devices that support write barriers.
discard
Issue command to let the block device reclaim space freed by the
filesystem. This is useful for SSD devices, thinly provisioned
LUNs and virtual machine images, but may have a performance
impact.
nodiscard (*)
Enable/disable the issuing of commands to let the block
device reclaim space freed by the filesystem. This is
useful for SSD devices, thinly provisioned LUNs and virtual
machine images, but may have a performance impact.
dmapi
Enable the DMAPI (Data Management API) event callouts.
Use with the "mtpt" option.
Note: It is currently recommended that you use the fstrim
application to discard unused blocks rather than the discard
mount option because the performance impact of this option
is quite severe.
grpid/bsdgroups and nogrpid/sysvgroups
These options define what group ID a newly created file gets.
When grpid is set, it takes the group ID of the directory in
which it is created; otherwise (the default) it takes the fsgid
of the current process, unless the directory has the setgid bit
set, in which case it takes the gid from the parent directory,
and also gets the setgid bit set if it is a directory itself.
grpid/bsdgroups
nogrpid/sysvgroups (*)
These options define what group ID a newly created file
gets. When grpid is set, it takes the group ID of the
directory in which it is created; otherwise it takes the
fsgid of the current process, unless the directory has the
setgid bit set, in which case it takes the gid from the
parent directory, and also gets the setgid bit set if it is
a directory itself.
ihashsize=value
In memory inode hashes have been removed, so this option has
no function as of August 2007. Option is deprecated.
filestreams
Make the data allocator use the filestreams allocation mode
across the entire filesystem rather than just on directories
configured to use it.
ikeep/noikeep
When ikeep is specified, XFS does not delete empty inode clusters
and keeps them around on disk. ikeep is the traditional XFS
behaviour. When noikeep is specified, empty inode clusters
are returned to the free space pool. The default is noikeep for
non-DMAPI mounts, while ikeep is the default when DMAPI is in use.
inode64
Indicates that XFS is allowed to create inodes at any location
in the filesystem, including those which will result in inode
numbers occupying more than 32 bits of significance. This is
the default allocation option. Applications which do not handle
inode numbers bigger than 32 bits, should use inode32 option.
ikeep
noikeep (*)
When ikeep is specified, XFS does not delete empty inode
clusters and keeps them around on disk. When noikeep is
specified, empty inode clusters are returned to the free
space pool.
inode32
Indicates that XFS is limited to create inodes at locations which
will not result in inode numbers with more than 32 bits of
significance. This is provided for backwards compatibility, since
64 bits inode numbers might cause problems for some applications
that cannot handle large inode numbers.
inode64 (*)
When inode32 is specified, it indicates that XFS limits
inode creation to locations which will not result in inode
numbers with more than 32 bits of significance.
largeio/nolargeio
When inode64 is specified, it indicates that XFS is allowed
to create inodes at any location in the filesystem,
including those which will result in inode numbers occupying
more than 32 bits of significance.
inode32 is provided for backwards compatibility with older
systems and applications, since 64 bits inode numbers might
cause problems for some applications that cannot handle
large inode numbers. If applications are in use which do
not handle inode numbers bigger than 32 bits, the inode32
option should be specified.
largeio
nolargeio (*)
If "nolargeio" is specified, the optimal I/O reported in
st_blksize by stat(2) will be as small as possible to allow user
applications to avoid inefficient read/modify/write I/O.
If "largeio" specified, a filesystem that has a "swidth" specified
will return the "swidth" value (in bytes) in st_blksize. If the
filesystem does not have a "swidth" specified but does specify
an "allocsize" then "allocsize" (in bytes) will be returned
instead.
If neither of these two options are specified, then filesystem
will behave as if "nolargeio" was specified.
st_blksize by stat(2) will be as small as possible to allow
user applications to avoid inefficient read/modify/write
I/O. This is typically the page size of the machine, as
this is the granularity of the page cache.
If "largeio" specified, a filesystem that was created with a
"swidth" specified will return the "swidth" value (in bytes)
in st_blksize. If the filesystem does not have a "swidth"
specified but does specify an "allocsize" then "allocsize"
(in bytes) will be returned instead. Otherwise the behaviour
is the same as if "nolargeio" was specified.
logbufs=value
Set the number of in-memory log buffers. Valid numbers range
from 2-8 inclusive.
The default value is 8 buffers for filesystems with a
blocksize of 64KiB, 4 buffers for filesystems with a blocksize
of 32KiB, 3 buffers for filesystems with a blocksize of 16KiB
and 2 buffers for all other configurations. Increasing the
number of buffers may increase performance on some workloads
at the cost of the memory used for the additional log buffers
and their associated control structures.
Set the number of in-memory log buffers. Valid numbers
range from 2-8 inclusive.
The default value is 8 buffers.
If the memory cost of 8 log buffers is too high on small
systems, then it may be reduced at some cost to performance
on metadata intensive workloads. The logbsize option below
controls the size of each buffer and so is also relevent to
this case.
logbsize=value
Set the size of each in-memory log buffer.
Size may be specified in bytes, or in kilobytes with a "k" suffix.
Valid sizes for version 1 and version 2 logs are 16384 (16k) and
32768 (32k). Valid sizes for version 2 logs also include
65536 (64k), 131072 (128k) and 262144 (256k).
The default value for machines with more than 32MiB of memory
is 32768, machines with less memory use 16384 by default.
Set the size of each in-memory log buffer. The size may be
specified in bytes, or in kilobytes with a "k" suffix.
Valid sizes for version 1 and version 2 logs are 16384 (16k)
and 32768 (32k). Valid sizes for version 2 logs also
include 65536 (64k), 131072 (128k) and 262144 (256k). The
logbsize must be an integer multiple of the log
stripe unit configured at mkfs time.
The default value for for version 1 logs is 32768, while the
default value for version 2 logs is MAX(32768, log_sunit).
logdev=device and rtdev=device
Use an external log (metadata journal) and/or real-time device.
@ -124,16 +157,11 @@ When mounting an XFS filesystem, the following options are accepted.
optional, and the log section can be separate from the data
section or contained within it.
mtpt=mountpoint
Use with the "dmapi" option. The value specified here will be
included in the DMAPI mount event, and should be the path of
the actual mountpoint that is used.
noalign
Data allocations will not be aligned at stripe unit boundaries.
noatime
Access timestamps are not updated when a file is read.
Data allocations will not be aligned at stripe unit
boundaries. This is only relevant to filesystems created
with non-zero data alignment parameters (sunit, swidth) by
mkfs.
norecovery
The filesystem will be mounted without running log recovery.
@ -144,8 +172,14 @@ When mounting an XFS filesystem, the following options are accepted.
the mount will fail.
nouuid
Don't check for double mounted file systems using the file system uuid.
This is useful to mount LVM snapshot volumes.
Don't check for double mounted file systems using the file
system uuid. This is useful to mount LVM snapshot volumes,
and often used in combination with "norecovery" for mounting
read-only snapshots.
noquota
Forcibly turns off all quota accounting and enforcement
within the filesystem.
uquota/usrquota/uqnoenforce/quota
User disk quota accounting enabled, and limits (optionally)
@ -160,24 +194,64 @@ When mounting an XFS filesystem, the following options are accepted.
enforced. Refer to xfs_quota(8) for further details.
sunit=value and swidth=value
Used to specify the stripe unit and width for a RAID device or
a stripe volume. "value" must be specified in 512-byte block
units.
If this option is not specified and the filesystem was made on
a stripe volume or the stripe width or unit were specified for
the RAID device at mkfs time, then the mount system call will
restore the value from the superblock. For filesystems that
are made directly on RAID devices, these options can be used
to override the information in the superblock if the underlying
disk layout changes after the filesystem has been created.
The "swidth" option is required if the "sunit" option has been
specified, and must be a multiple of the "sunit" value.
Used to specify the stripe unit and width for a RAID device
or a stripe volume. "value" must be specified in 512-byte
block units. These options are only relevant to filesystems
that were created with non-zero data alignment parameters.
The sunit and swidth parameters specified must be compatible
with the existing filesystem alignment characteristics. In
general, that means the only valid changes to sunit are
increasing it by a power-of-2 multiple. Valid swidth values
are any integer multiple of a valid sunit value.
Typically the only time these mount options are necessary if
after an underlying RAID device has had it's geometry
modified, such as adding a new disk to a RAID5 lun and
reshaping it.
swalloc
Data allocations will be rounded up to stripe width boundaries
when the current end of file is being extended and the file
size is larger than the stripe width size.
wsync
When specified, all filesystem namespace operations are
executed synchronously. This ensures that when the namespace
operation (create, unlink, etc) completes, the change to the
namespace is on stable storage. This is useful in HA setups
where failover must not result in clients seeing
inconsistent namespace presentation during or after a
failover event.
Deprecated Mount Options
========================
delaylog/nodelaylog
Delayed logging is the only logging method that XFS supports
now, so these mount options are now ignored.
Due for removal in 3.12.
ihashsize=value
In memory inode hashes have been removed, so this option has
no function as of August 2007. Option is deprecated.
Due for removal in 3.12.
irixsgid
This behaviour is now controlled by a sysctl, so the mount
option is ignored.
Due for removal in 3.12.
osyncisdsync
osyncisosync
O_SYNC and O_DSYNC are fully supported, so there is no need
for these options any more.
Due for removal in 3.12.
sysctls
=======
@ -189,15 +263,20 @@ The following sysctls are available for the XFS filesystem:
in /proc/fs/xfs/stat. It then immediately resets to "0".
fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000)
The interval at which the xfssyncd thread flushes metadata
out to disk. This thread will flush log activity out, and
do some processing on unlinked inodes.
The interval at which the filesystem flushes metadata
out to disk and runs internal cache cleanup routines.
fs.xfs.xfsbufd_centisecs (Min: 50 Default: 100 Max: 3000)
The interval at which xfsbufd scans the dirty metadata buffers list.
fs.xfs.filestream_centisecs (Min: 1 Default: 3000 Max: 360000)
The interval at which the filesystem ages filestreams cache
references and returns timed-out AGs back to the free stream
pool.
fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000)
The age at which xfsbufd flushes dirty metadata buffers to disk.
fs.xfs.speculative_prealloc_lifetime
(Units: seconds Min: 1 Default: 300 Max: 86400)
The interval at which the background scanning for inodes
with unused speculative preallocation runs. The scan
removes unused preallocation from clean inodes and releases
the unused space back to the free pool.
fs.xfs.error_level (Min: 0 Default: 3 Max: 11)
A volume knob for error reporting when internal errors occur.
@ -254,9 +333,31 @@ The following sysctls are available for the XFS filesystem:
by the xfs_io(8) chattr command on a directory to be
inherited by files in that directory.
fs.xfs.inherit_nodefrag (Min: 0 Default: 1 Max: 1)
Setting this to "1" will cause the "nodefrag" flag set
by the xfs_io(8) chattr command on a directory to be
inherited by files in that directory.
fs.xfs.rotorstep (Min: 1 Default: 1 Max: 256)
In "inode32" allocation mode, this option determines how many
files the allocator attempts to allocate in the same allocation
group before moving to the next allocation group. The intent
is to control the rate at which the allocator moves between
allocation groups when allocating extents for new files.
Deprecated Sysctls
==================
fs.xfs.xfsbufd_centisecs (Min: 50 Default: 100 Max: 3000)
Dirty metadata is now tracked by the log subsystem and
flushing is driven by log space and idling demands. The
xfsbufd no longer exists, so this syctl does nothing.
Due for removal in 3.14.
fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000)
Dirty metadata is now tracked by the log subsystem and
flushing is driven by log space and idling demands. The
xfsbufd no longer exists, so this syctl does nothing.
Due for removal in 3.14.

13
Documentation/kbuild/kconfig.txt
View File

@ -174,6 +174,19 @@ Searching in menuconfig:
/^hotplug
When searching, symbols are sorted thus:
- exact match first: an exact match is when the search matches
the complete symbol name;
- alphabetical order: when two symbols do not match exactly,
they are sorted in alphabetical order (in the user's current
locale).
For example: ^ATH.K matches:
ATH5K ATH9K ATH5K_AHB ATH5K_DEBUG [...] ATH6KL ATH6KL_DEBUG
[...] ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_COMMON [...]
of which only ATH5K and ATH9K match exactly and so are sorted
first (and in alphabetical order), then come all other symbols,
sorted in alphabetical order.
______________________________________________________________________
User interface options for 'menuconfig'

27
Documentation/kernel-parameters.txt
View File

@ -2681,9 +2681,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Run specified binary instead of /init from the ramdisk,
used for early userspace startup. See initrd.
reboot= [BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
Format: <reboot_mode>[,<reboot_mode2>[,...]]
See arch/*/kernel/reboot.c or arch/*/kernel/process.c
reboot= [KNL]
Format (x86 or x86_64):
[w[arm] | c[old] | h[ard] | s[oft] | g[pio]] \
[[,]s[mp]#### \
[[,]b[ios] | a[cpi] | k[bd] | t[riple] | e[fi] | p[ci]] \
[[,]f[orce]
Where reboot_mode is one of warm (soft) or cold (hard) or gpio,
reboot_type is one of bios, acpi, kbd, triple, efi, or pci,
reboot_force is either force or not specified,
reboot_cpu is s[mp]#### with #### being the processor
to be used for rebooting.
relax_domain_level=
[KNL, SMP] Set scheduler's default relax_domain_level.
@ -3073,6 +3081,19 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
See also Documentation/trace/ftrace.txt "trace options"
section.
traceoff_on_warning
[FTRACE] enable this option to disable tracing when a
warning is hit. This turns off "tracing_on". Tracing can
be enabled again by echoing '1' into the "tracing_on"
file located in /sys/kernel/debug/tracing/
This option is useful, as it disables the trace before
the WARNING dump is called, which prevents the trace to
be filled with content caused by the warning output.
This option can also be set at run time via the sysctl
option: kernel/traceoff_on_warning
transparent_hugepage=
[KNL]
Format: [always|madvise|never]

2
Documentation/media-framework.txt
View File

@ -265,7 +265,7 @@ connected to another pad through an enabled link
media_entity_find_link(struct media_pad *source,
struct media_pad *sink);
media_entity_remote_source(struct media_pad *pad);
media_entity_remote_pad(struct media_pad *pad);
Refer to the kerneldoc documentation for more information.

1
Documentation/networking/.gitignore vendored
View File

@ -1 +0,0 @@
ifenslave

2
Documentation/networking/00-INDEX
View File

@ -88,8 +88,6 @@ gianfar.txt
- Gianfar Ethernet Driver.
ieee802154.txt
- Linux IEEE 802.15.4 implementation, API and drivers
ifenslave.c
- Configure network interfaces for parallel routing (bonding).
igb.txt
- README for the Intel Gigabit Ethernet Driver (igb).
igbvf.txt

5
Documentation/networking/Makefile
View File

@ -1,11 +1,6 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := ifenslave
HOSTCFLAGS_ifenslave.o += -I$(objtree)/usr/include
# Tell kbuild to always build the programs
always := $(hostprogs-y)

7
Documentation/networking/arcnet.txt
View File

@ -70,9 +70,10 @@ list, mail to linux-arcnet@tichy.ch.uj.edu.pl.
There are archives of the mailing list at:
http://epistolary.org/mailman/listinfo.cgi/arcnet
The people on linux-net@vger.kernel.org have also been known to be very
helpful, especially when we're talking about ALPHA Linux kernels that may or
may not work right in the first place.
The people on linux-net@vger.kernel.org (now defunct, replaced by
netdev@vger.kernel.org) have also been known to be very helpful, especially
when we're talking about ALPHA Linux kernels that may or may not work right
in the first place.
Other Drivers and Info

79
Documentation/networking/bonding.txt
View File

@ -104,8 +104,7 @@ Table of Contents
==============================
Most popular distro kernels ship with the bonding driver
already available as a module and the ifenslave user level control
program installed and ready for use. If your distro does not, or you
already available as a module. If your distro does not, or you
have need to compile bonding from source (e.g., configuring and
installing a mainline kernel from kernel.org), you'll need to perform
the following steps:
@ -124,46 +123,13 @@ device support" section. It is recommended that you configure the
driver as module since it is currently the only way to pass parameters
to the driver or configure more than one bonding device.
Build and install the new kernel and modules, then continue
below to install ifenslave.
Build and install the new kernel and modules.
1.2 Install ifenslave Control Utility
1.2 Bonding Control Utility
-------------------------------------
The ifenslave user level control program is included in the
kernel source tree, in the file Documentation/networking/ifenslave.c.
It is generally recommended that you use the ifenslave that
corresponds to the kernel that you are using (either from the same
source tree or supplied with the distro), however, ifenslave
executables from older kernels should function (but features newer
than the ifenslave release are not supported). Running an ifenslave
that is newer than the kernel is not supported, and may or may not
work.
To install ifenslave, do the following:
# gcc -Wall -O -I/usr/src/linux/include ifenslave.c -o ifenslave
# cp ifenslave /sbin/ifenslave
If your kernel source is not in "/usr/src/linux," then replace
"/usr/src/linux/include" in the above with the location of your kernel
source include directory.
You may wish to back up any existing /sbin/ifenslave, or, for
testing or informal use, tag the ifenslave to the kernel version
(e.g., name the ifenslave executable /sbin/ifenslave-2.6.10).
IMPORTANT NOTE:
If you omit the "-I" or specify an incorrect directory, you
may end up with an ifenslave that is incompatible with the kernel
you're trying to build it for. Some distros (e.g., Red Hat from 7.1
onwards) do not have /usr/include/linux symbolically linked to the
default kernel source include directory.
SECOND IMPORTANT NOTE:
If you plan to configure bonding using sysfs or using the
/etc/network/interfaces file, you do not need to use ifenslave.
It is recommended to configure bonding via iproute2 (netlink)
or sysfs, the old ifenslave control utility is obsolete.
2. Bonding Driver Options
=========================
@ -337,6 +303,12 @@ arp_validate
such a situation, validation of backup slaves must be
disabled.
The validation of ARP requests on backup slaves is mainly
helping bonding to decide which slaves are more likely to
work in case of the active slave failure, it doesn't really
guarantee that the backup slave will work if it's selected
as the next active slave.
This option is useful in network configurations in which
multiple bonding hosts are concurrently issuing ARPs to one or
more targets beyond a common switch. Should the link between
@ -349,6 +321,25 @@ arp_validate
This option was added in bonding version 3.1.0.
arp_all_targets
Specifies the quantity of arp_ip_targets that must be reachable
in order for the ARP monitor to consider a slave as being up.
This option affects only active-backup mode for slaves with
arp_validation enabled.
Possible values are:
any or 0
consider the slave up only when any of the arp_ip_targets
is reachable
all or 1
consider the slave up only when all of the arp_ip_targets
are reachable
downdelay
Specifies the time, in milliseconds, to wait before disabling
@ -851,7 +842,7 @@ resend_igmp
==============================
You can configure bonding using either your distro's network
initialization scripts, or manually using either ifenslave or the
initialization scripts, or manually using either iproute2 or the
sysfs interface. Distros generally use one of three packages for the
network initialization scripts: initscripts, sysconfig or interfaces.
Recent versions of these packages have support for bonding, while older
@ -1160,7 +1151,7 @@ not support this method for specifying multiple bonding interfaces; for
those instances, see the "Configuring Multiple Bonds Manually" section,
below.
3.3 Configuring Bonding Manually with Ifenslave
3.3 Configuring Bonding Manually with iproute2
-----------------------------------------------
This section applies to distros whose network initialization
@ -1171,7 +1162,7 @@ version 8.
The general method for these systems is to place the bonding
module parameters into a config file in /etc/modprobe.d/ (as
appropriate for the installed distro), then add modprobe and/or
ifenslave commands to the system's global init script. The name of
`ip link` commands to the system's global init script. The name of
the global init script differs; for sysconfig, it is
/etc/init.d/boot.local and for initscripts it is /etc/rc.d/rc.local.
@ -1183,8 +1174,8 @@ reboots, edit the appropriate file (/etc/init.d/boot.local or
modprobe bonding mode=balance-alb miimon=100
modprobe e100
ifconfig bond0 192.168.1.1 netmask 255.255.255.0 up
ifenslave bond0 eth0
ifenslave bond0 eth1
ip link set eth0 master bond0
ip link set eth1 master bond0
Replace the example bonding module parameters and bond0
network configuration (IP address, netmask, etc) with the appropriate

1105
Documentation/networking/ifenslave.c
View File

File diff suppressed because it is too large Load Diff

11
Documentation/networking/ip-sysctl.txt
View File

@ -685,6 +685,15 @@ ip_dynaddr - BOOLEAN
occurs.
Default: 0
ip_early_demux - BOOLEAN
Optimize input packet processing down to one demux for
certain kinds of local sockets. Currently we only do this
for established TCP sockets.
It may add an additional cost for pure routing workloads that
reduces overall throughput, in such case you should disable it.
Default: 1
icmp_echo_ignore_all - BOOLEAN
If set non-zero, then the kernel will ignore all ICMP ECHO
requests sent to it.
@ -729,7 +738,7 @@ icmp_ignore_bogus_error_responses - BOOLEAN
frames. Such violations are normally logged via a kernel warning.
If this is set to TRUE, the kernel will not give such warnings, which
will avoid log file clutter.
Default: FALSE
Default: 1
icmp_errors_use_inbound_ifaddr - BOOLEAN

13
Documentation/networking/ipvs-sysctl.txt
View File

@ -181,6 +181,19 @@ snat_reroute - BOOLEAN
always be the same as the original route so it is an optimisation
to disable snat_reroute and avoid the recalculation.
sync_persist_mode - INTEGER
default 0
Controls the synchronisation of connections when using persistence
0: All types of connections are synchronised
1: Attempt to reduce the synchronisation traffic depending on
the connection type. For persistent services avoid synchronisation
for normal connections, do it only for persistence templates.
In such case, for TCP and SCTP it may need enabling sloppy_tcp and
sloppy_sctp flags on backup servers. For non-persistent services
such optimization is not applied, mode 0 is assumed.
sync_version - INTEGER
default 1

6
Documentation/networking/netlink_mmap.txt
View File

@ -114,7 +114,7 @@ Some parameters are constrained, specifically:
- nm_frame_nr must equal the actual number of frames as specified above.
When the kernel can't allocate physically continuous memory for a ring block,
it will fall back to use physically discontinous memory. This might affect
it will fall back to use physically discontinuous memory. This might affect
performance negatively, in order to avoid this the nm_frame_size parameter
should be chosen to be as small as possible for the required frame size and
the number of blocks should be increased instead.
@ -274,9 +274,9 @@ This example assumes some ring parameters of the ring setup are available.
/* Get next frame header */
hdr = rx_ring + frame_offset;
if (hdr->nm_status == NL_MMAP_STATUS_VALID)
if (hdr->nm_status == NL_MMAP_STATUS_VALID) {
/* Regular memory mapped frame */
nlh = (void *hdr) + NL_MMAP_HDRLEN;
nlh = (void *)hdr + NL_MMAP_HDRLEN;
len = hdr->nm_len;
/* Release empty message immediately. May happen

133
Documentation/networking/packet_mmap.txt
View File

@ -704,6 +704,12 @@ So it seems to be a good candidate to be used with packet fanout.
Minimal example code by Daniel Borkmann based on Chetan Loke's lolpcap (compile
it with gcc -Wall -O2 blob.c, and try things like "./a.out eth0", etc.):
/* Written from scratch, but kernel-to-user space API usage
* dissected from lolpcap:
* Copyright 2011, Chetan Loke <loke.chetan@gmail.com>
* License: GPL, version 2.0
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
@ -722,27 +728,6 @@ it with gcc -Wall -O2 blob.c, and try things like "./a.out eth0", etc.):
#include <linux/if_ether.h>
#include <linux/ip.h>
#define BLOCK_SIZE (1 << 22)
#define FRAME_SIZE 2048
#define NUM_BLOCKS 64
#define NUM_FRAMES ((BLOCK_SIZE * NUM_BLOCKS) / FRAME_SIZE)
#define BLOCK_RETIRE_TOV_IN_MS 64
#define BLOCK_PRIV_AREA_SZ 13
#define ALIGN_8(x) (((x) + 8 - 1) & ~(8 - 1))
#define BLOCK_STATUS(x) ((x)->h1.block_status)
#define BLOCK_NUM_PKTS(x) ((x)->h1.num_pkts)
#define BLOCK_O2FP(x) ((x)->h1.offset_to_first_pkt)
#define BLOCK_LEN(x) ((x)->h1.blk_len)
#define BLOCK_SNUM(x) ((x)->h1.seq_num)
#define BLOCK_O2PRIV(x) ((x)->offset_to_priv)
#define BLOCK_PRIV(x) ((void *) ((uint8_t *) (x) + BLOCK_O2PRIV(x)))
#define BLOCK_HDR_LEN (ALIGN_8(sizeof(struct block_desc)))
#define BLOCK_PLUS_PRIV(sz_pri) (BLOCK_HDR_LEN + ALIGN_8((sz_pri)))
#ifndef likely
# define likely(x) __builtin_expect(!!(x), 1)
#endif
@ -765,7 +750,7 @@ struct ring {
static unsigned long packets_total = 0, bytes_total = 0;
static sig_atomic_t sigint = 0;
void sighandler(int num)
static void sighandler(int num)
{
sigint = 1;
}
@ -774,6 +759,8 @@ static int setup_socket(struct ring *ring, char *netdev)
{
int err, i, fd, v = TPACKET_V3;
struct sockaddr_ll ll;
unsigned int blocksiz = 1 << 22, framesiz = 1 << 11;
unsigned int blocknum = 64;
fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (fd < 0) {
@ -788,13 +775,12 @@ static int setup_socket(struct ring *ring, char *netdev)
}
memset(&ring->req, 0, sizeof(ring->req));
ring->req.tp_block_size = BLOCK_SIZE;
ring->req.tp_frame_size = FRAME_SIZE;
ring->req.tp_block_nr = NUM_BLOCKS;
ring->req.tp_frame_nr = NUM_FRAMES;
ring->req.tp_retire_blk_tov = BLOCK_RETIRE_TOV_IN_MS;
ring->req.tp_sizeof_priv = BLOCK_PRIV_AREA_SZ;
ring->req.tp_feature_req_word |= TP_FT_REQ_FILL_RXHASH;
ring->req.tp_block_size = blocksiz;
ring->req.tp_frame_size = framesiz;
ring->req.tp_block_nr = blocknum;
ring->req.tp_frame_nr = (blocksiz * blocknum) / framesiz;
ring->req.tp_retire_blk_tov = 60;
ring->req.tp_feature_req_word = TP_FT_REQ_FILL_RXHASH;
err = setsockopt(fd, SOL_PACKET, PACKET_RX_RING, &ring->req,
sizeof(ring->req));
@ -804,8 +790,7 @@ static int setup_socket(struct ring *ring, char *netdev)
}
ring->map = mmap(NULL, ring->req.tp_block_size * ring->req.tp_block_nr,
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
fd, 0);
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED, fd, 0);
if (ring->map == MAP_FAILED) {
perror("mmap");
exit(1);
@ -835,58 +820,6 @@ static int setup_socket(struct ring *ring, char *netdev)
return fd;
}
#ifdef __checked
static uint64_t prev_block_seq_num = 0;
void assert_block_seq_num(struct block_desc *pbd)
{
if (unlikely(prev_block_seq_num + 1 != BLOCK_SNUM(pbd))) {
printf("prev_block_seq_num:%"PRIu64", expected seq:%"PRIu64" != "
"actual seq:%"PRIu64"\n", prev_block_seq_num,
prev_block_seq_num + 1, (uint64_t) BLOCK_SNUM(pbd));
exit(1);
}
prev_block_seq_num = BLOCK_SNUM(pbd);
}
static void assert_block_len(struct block_desc *pbd, uint32_t bytes, int block_num)
{
if (BLOCK_NUM_PKTS(pbd)) {
if (unlikely(bytes != BLOCK_LEN(pbd))) {
printf("block:%u with %upackets, expected len:%u != actual len:%u\n",
block_num, BLOCK_NUM_PKTS(pbd), bytes, BLOCK_LEN(pbd));
exit(1);
}
} else {
if (unlikely(BLOCK_LEN(pbd) != BLOCK_PLUS_PRIV(BLOCK_PRIV_AREA_SZ))) {
printf("block:%u, expected len:%lu != actual len:%u\n",
block_num, BLOCK_HDR_LEN, BLOCK_LEN(pbd));
exit(1);
}
}
}
static void assert_block_header(struct block_desc *pbd, const int block_num)
{
uint32_t block_status = BLOCK_STATUS(pbd);
if (unlikely((block_status & TP_STATUS_USER) == 0)) {
printf("block:%u, not in TP_STATUS_USER\n", block_num);
exit(1);
}
assert_block_seq_num(pbd);
}
#else
static inline void assert_block_header(struct block_desc *pbd, const int block_num)
{
}
static void assert_block_len(struct block_desc *pbd, uint32_t bytes, int block_num)
{
}
#endif
static void display(struct tpacket3_hdr *ppd)
{
struct ethhdr *eth = (struct ethhdr *) ((uint8_t *) ppd + ppd->tp_mac);
@ -916,37 +849,27 @@ static void display(struct tpacket3_hdr *ppd)
static void walk_block(struct block_desc *pbd, const int block_num)
{
int num_pkts = BLOCK_NUM_PKTS(pbd), i;
int num_pkts = pbd->h1.num_pkts, i;
unsigned long bytes = 0;
unsigned long bytes_with_padding = BLOCK_PLUS_PRIV(BLOCK_PRIV_AREA_SZ);
struct tpacket3_hdr *ppd;
assert_block_header(pbd, block_num);
ppd = (struct tpacket3_hdr *) ((uint8_t *) pbd + BLOCK_O2FP(pbd));
ppd = (struct tpacket3_hdr *) ((uint8_t *) pbd +
pbd->h1.offset_to_first_pkt);
for (i = 0; i < num_pkts; ++i) {
bytes += ppd->tp_snaplen;
if (ppd->tp_next_offset)
bytes_with_padding += ppd->tp_next_offset;
else
bytes_with_padding += ALIGN_8(ppd->tp_snaplen + ppd->tp_mac);
display(ppd);
ppd = (struct tpacket3_hdr *) ((uint8_t *) ppd + ppd->tp_next_offset);
__sync_synchronize();
ppd = (struct tpacket3_hdr *) ((uint8_t *) ppd +
ppd->tp_next_offset);
}
assert_block_len(pbd, bytes_with_padding, block_num);
packets_total += num_pkts;
bytes_total += bytes;
}
void flush_block(struct block_desc *pbd)
static void flush_block(struct block_desc *pbd)
{
BLOCK_STATUS(pbd) = TP_STATUS_KERNEL;
__sync_synchronize();
pbd->h1.block_status = TP_STATUS_KERNEL;
}
static void teardown_socket(struct ring *ring, int fd)
@ -962,7 +885,7 @@ int main(int argc, char **argp)
socklen_t len;
struct ring ring;
struct pollfd pfd;
unsigned int block_num = 0;
unsigned int block_num = 0, blocks = 64;
struct block_desc *pbd;
struct tpacket_stats_v3 stats;
@ -984,15 +907,15 @@ int main(int argc, char **argp)
while (likely(!sigint)) {
pbd = (struct block_desc *) ring.rd[block_num].iov_base;
retry_block:
if ((BLOCK_STATUS(pbd) & TP_STATUS_USER) == 0) {
if ((pbd->h1.block_status & TP_STATUS_USER) == 0) {
poll(&pfd, 1, -1);
goto retry_block;
continue;
}
walk_block(pbd, block_num);
flush_block(pbd);
block_num = (block_num + 1) % NUM_BLOCKS;
block_num = (block_num + 1) % blocks;
}
len = sizeof(stats);

58
Documentation/networking/scaling.txt
View File

@ -163,6 +163,64 @@ and unnecessary. If there are fewer hardware queues than CPUs, then
RPS might be beneficial if the rps_cpus for each queue are the ones that
share the same memory domain as the interrupting CPU for that queue.
==== RPS Flow Limit
RPS scales kernel receive processing across CPUs without introducing
reordering. The trade-off to sending all packets from the same flow
to the same CPU is CPU load imbalance if flows vary in packet rate.
In the extreme case a single flow dominates traffic. Especially on
common server workloads with many concurrent connections, such
behavior indicates a problem such as a misconfiguration or spoofed
source Denial of Service attack.
Flow Limit is an optional RPS feature that prioritizes small flows
during CPU contention by dropping packets from large flows slightly
ahead of those from small flows. It is active only when an RPS or RFS
destination CPU approaches saturation. Once a CPU's input packet
queue exceeds half the maximum queue length (as set by sysctl
net.core.netdev_max_backlog), the kernel starts a per-flow packet
count over the last 256 packets. If a flow exceeds a set ratio (by
default, half) of these packets when a new packet arrives, then the
new packet is dropped. Packets from other flows are still only
dropped once the input packet queue reaches netdev_max_backlog.
No packets are dropped when the input packet queue length is below
the threshold, so flow limit does not sever connections outright:
even large flows maintain connectivity.
== Interface
Flow limit is compiled in by default (CONFIG_NET_FLOW_LIMIT), but not
turned on. It is implemented for each CPU independently (to avoid lock
and cache contention) and toggled per CPU by setting the relevant bit
in sysctl net.core.flow_limit_cpu_bitmap. It exposes the same CPU
bitmap interface as rps_cpus (see above) when called from procfs:
/proc/sys/net/core/flow_limit_cpu_bitmap
Per-flow rate is calculated by hashing each packet into a hashtable
bucket and incrementing a per-bucket counter. The hash function is
the same that selects a CPU in RPS, but as the number of buckets can
be much larger than the number of CPUs, flow limit has finer-grained
identification of large flows and fewer false positives. The default
table has 4096 buckets. This value can be modified through sysctl
net.core.flow_limit_table_len
The value is only consulted when a new table is allocated. Modifying
it does not update active tables.
== Suggested Configuration
Flow limit is useful on systems with many concurrent connections,
where a single connection taking up 50% of a CPU indicates a problem.
In such environments, enable the feature on all CPUs that handle
network rx interrupts (as set in /proc/irq/N/smp_affinity).
The feature depends on the input packet queue length to exceed
the flow limit threshold (50%) + the flow history length (256).
Setting net.core.netdev_max_backlog to either 1000 or 10000
performed well in experiments.
RFS: Receive Flow Steering
==========================

2
Documentation/networking/vortex.txt
View File

@ -359,7 +359,7 @@ steps you should take:
- OK, it's a driver problem.
You need to generate a report. Typically this is an email to the
maintainer and/or linux-net@vger.kernel.org. The maintainer's
maintainer and/or netdev@vger.kernel.org. The maintainer's
email address will be in the driver source or in the MAINTAINERS file.
- The contents of your report will vary a lot depending upon the

8
Documentation/parisc/registers
View File

@ -77,6 +77,14 @@ PSW default E value 0
Shadow Registers used by interruption handler code
TOC enable bit 1
=========================================================================
The PA-RISC architecture defines 7 registers as "shadow registers".
Those are used in RETURN FROM INTERRUPTION AND RESTORE instruction to reduce
the state save and restore time by eliminating the need for general register
(GR) saves and restores in interruption handlers.
Shadow registers are the GRs 1, 8, 9, 16, 17, 24, and 25.
=========================================================================
Register usage notes, originally from John Marvin, with some additional
notes from Randolph Chung.

32
Documentation/printk-formats.txt
View File

@ -121,6 +121,38 @@ IPv6 addresses:
print a compressed IPv6 address as described by
http://tools.ietf.org/html/rfc5952
IPv4/IPv6 addresses (generic, with port, flowinfo, scope):
%pIS 1.2.3.4 or 0001:0002:0003:0004:0005:0006:0007:0008
%piS 001.002.003.004 or 00010002000300040005000600070008
%pISc 1.2.3.4 or 1:2:3:4:5:6:7:8
%pISpc 1.2.3.4:12345 or [1:2:3:4:5:6:7:8]:12345
%p[Ii]S[pfschnbl]
For printing an IP address without the need to distinguish whether it's
of type AF_INET or AF_INET6, a pointer to a valid 'struct sockaddr',
specified through 'IS' or 'iS', can be passed to this format specifier.
The additional 'p', 'f', and 's' specifiers are used to specify port
(IPv4, IPv6), flowinfo (IPv6) and scope (IPv6). Ports have a ':' prefix,
flowinfo a '/' and scope a '%', each followed by the actual value.
In case of an IPv6 address the compressed IPv6 address as described by
http://tools.ietf.org/html/rfc5952 is being used if the additional
specifier 'c' is given. The IPv6 address is surrounded by '[', ']' in
case of additional specifiers 'p', 'f' or 's' as suggested by
https://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-07
In case of IPv4 addresses, the additional 'h', 'n', 'b', and 'l'
specifiers can be used as well and are ignored in case of an IPv6
address.
Further examples:
%pISfc 1.2.3.4 or [1:2:3:4:5:6:7:8]/123456789
%pISsc 1.2.3.4 or [1:2:3:4:5:6:7:8]%1234567890
%pISpfc 1.2.3.4:12345 or [1:2:3:4:5:6:7:8]:12345/123456789
UUID/GUID addresses:
%pUb 00010203-0405-0607-0809-0a0b0c0d0e0f

37
Documentation/pwm.txt
View File

@ -45,6 +45,43 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns);
To start/stop toggling the PWM output use pwm_enable()/pwm_disable().
Using PWMs with the sysfs interface
-----------------------------------
If CONFIG_SYSFS is enabled in your kernel configuration a simple sysfs
interface is provided to use the PWMs from userspace. It is exposed at
/sys/class/pwm/. Each probed PWM controller/chip will be exported as
pwmchipN, where N is the base of the PWM chip. Inside the directory you
will find:
npwm - The number of PWM channels this chip supports (read-only).
export - Exports a PWM channel for use with sysfs (write-only).
unexport - Unexports a PWM channel from sysfs (write-only).
The PWM channels are numbered using a per-chip index from 0 to npwm-1.
When a PWM channel is exported a pwmX directory will be created in the
pwmchipN directory it is associated with, where X is the number of the
channel that was exported. The following properties will then be available:
period - The total period of the PWM signal (read/write).
Value is in nanoseconds and is the sum of the active and inactive
time of the PWM.
duty_cycle - The active time of the PWM signal (read/write).
Value is in nanoseconds and must be less than the period.
polarity - Changes the polarity of the PWM signal (read/write).
Writes to this property only work if the PWM chip supports changing
the polarity. The polarity can only be changed if the PWM is not
enabled. Value is the string "normal" or "inversed".
enable - Enable/disable the PWM signal (read/write).
0 - disabled
1 - enabled
Implementing a PWM driver
-------------------------

44
Documentation/sysctl/net.txt
View File

@ -26,7 +26,7 @@ Table : Subdirectories in /proc/sys/net
ipv4 IP version 4 x25 X.25 protocol
ipx IPX token-ring IBM token ring
bridge Bridging decnet DEC net
ipv6 IP version 6
ipv6 IP version 6 tipc TIPC
..............................................................................
1. /proc/sys/net/core - Network core options
@ -50,6 +50,30 @@ The maximum number of packets that kernel can handle on a NAPI interrupt,
it's a Per-CPU variable.
Default: 64
busy_read
----------------
Low latency busy poll timeout for socket reads. (needs CONFIG_NET_LL_RX_POLL)
Approximate time in us to busy loop waiting for packets on the device queue.
This sets the default value of the SO_BUSY_POLL socket option.
Can be set or overridden per socket by setting socket option SO_BUSY_POLL,
which is the preferred method of enabling. If you need to enable the feature
globally via sysctl, a value of 50 is recommended.
Will increase power usage.
Default: 0 (off)
busy_poll
----------------
Low latency busy poll timeout for poll and select. (needs CONFIG_NET_LL_RX_POLL)
Approximate time in us to busy loop waiting for events.
Recommended value depends on the number of sockets you poll on.
For several sockets 50, for several hundreds 100.
For more than that you probably want to use epoll.
Note that only sockets with SO_BUSY_POLL set will be busy polled,
so you want to either selectively set SO_BUSY_POLL on those sockets or set
sysctl.net.busy_read globally.
Will increase power usage.
Default: 0 (off)
rmem_default
------------
@ -93,8 +117,7 @@ netdev_budget
Maximum number of packets taken from all interfaces in one polling cycle (NAPI
poll). In one polling cycle interfaces which are registered to polling are
probed in a round-robin manner. The limit of packets in one such probe can be
set per-device via sysfs class/net/<device>/weight .
probed in a round-robin manner.
netdev_max_backlog
------------------
@ -201,3 +224,18 @@ IPX.
The /proc/net/ipx_route table holds a list of IPX routes. For each route it
gives the destination network, the router node (or Directly) and the network
address of the router (or Connected) for internal networks.
6. TIPC
-------------------------------------------------------
The TIPC protocol now has a tunable for the receive memory, similar to the
tcp_rmem - i.e. a vector of 3 INTEGERs: (min, default, max)
# cat /proc/sys/net/tipc/tipc_rmem
4252725 34021800 68043600
#
The max value is set to CONN_OVERLOAD_LIMIT, and the default and min values
are scaled (shifted) versions of that same value. Note that the min value
is not at this point in time used in any meaningful way, but the triplet is
preserved in order to be consistent with things like tcp_rmem.

2
Documentation/sysctl/vm.txt
View File

@ -510,7 +510,7 @@ Specify "[Dd]efault" to request automatic configuration. Autoconfiguration
will select "node" order in following case.
(1) if the DMA zone does not exist or
(2) if the DMA zone comprises greater than 50% of the available memory or
(3) if any node's DMA zone comprises greater than 60% of its local memory and
(3) if any node's DMA zone comprises greater than 70% of its local memory and
the amount of local memory is big enough.
Otherwise, "zone" order will be selected. Default order is recommended unless

47
Documentation/thermal/x86_pkg_temperature_thermal Normal file
View File

@ -0,0 +1,47 @@
Kernel driver: x86_pkg_temp_thermal
===================
Supported chips:
* x86: with package level thermal management
(Verify using: CPUID.06H:EAX[bit 6] =1)
Authors: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reference
---
Intel® 64 and IA-32 Architectures Software Developer’s Manual (Jan, 2013):
Chapter 14.6: PACKAGE LEVEL THERMAL MANAGEMENT
Description
---------
This driver register CPU digital temperature package level sensor as a thermal
zone with maximum two user mode configurable trip points. Number of trip points
depends on the capability of the package. Once the trip point is violated,
user mode can receive notification via thermal notification mechanism and can
take any action to control temperature.
Threshold management
--------------------
Each package will register as a thermal zone under /sys/class/thermal.
Example:
/sys/class/thermal/thermal_zone1
This contains two trip points:
- trip_point_0_temp
- trip_point_1_temp
User can set any temperature between 0 to TJ-Max temperature. Temperature units
are in milli-degree Celsius. Refer to "Documentation/thermal/sysfs-api.txt" for
thermal sys-fs details.
Any value other than 0 in these trip points, can trigger thermal notifications.
Setting 0, stops sending thermal notifications.
Thermal notifications: To get kobject-uevent notifications, set the thermal zone
policy to "user_space". For example: echo -n "user_space" > policy

15
Documentation/trace/events.txt
View File

@ -183,13 +183,22 @@ The relational-operators depend on the type of the field being tested:
The operators available for numeric fields are:
==, !=, <, <=, >, >=
==, !=, <, <=, >, >=, &
And for string fields they are:
==, !=
==, !=, ~
Currently, only exact string matches are supported.
The glob (~) only accepts a wild card character (*) at the start and or
end of the string. For example:
prev_comm ~ "*sh"
prev_comm ~ "sh*"
prev_comm ~ "*sh*"
But does not allow for it to be within the string:
prev_comm ~ "ba*sh" <-- is invalid
5.2 Setting filters
-------------------

13
Documentation/trace/ftrace.txt
View File

@ -2430,6 +2430,19 @@ The following commands are supported:
echo '!schedule:disable_event:sched:sched_switch' > \
set_ftrace_filter
- dump
When the function is hit, it will dump the contents of the ftrace
ring buffer to the console. This is useful if you need to debug
something, and want to dump the trace when a certain function
is hit. Perhaps its a function that is called before a tripple
fault happens and does not allow you to get a regular dump.
- cpudump
When the function is hit, it will dump the contents of the ftrace
ring buffer for the current CPU to the console. Unlike the "dump"
command, it only prints out the contents of the ring buffer for the
CPU that executed the function that triggered the dump.
trace_pipe
----------

6
Documentation/vfio.txt
View File

@ -172,12 +172,12 @@ group and can access them as follows:
struct vfio_device_info device_info = { .argsz = sizeof(device_info) };
/* Create a new container */
container = open("/dev/vfio/vfio, O_RDWR);
container = open("/dev/vfio/vfio", O_RDWR);
if (ioctl(container, VFIO_GET_API_VERSION) != VFIO_API_VERSION)
/* Unknown API version */
if (!ioctl(container, VFIO_CHECK_EXTENSION, VFIO_X86_IOMMU))
if (!ioctl(container, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU))
/* Doesn't support the IOMMU driver we want. */
/* Open the group */
@ -193,7 +193,7 @@ group and can access them as follows:
ioctl(group, VFIO_GROUP_SET_CONTAINER, &container);
/* Enable the IOMMU model we want */
ioctl(container, VFIO_SET_IOMMU, VFIO_X86_IOMMU)
ioctl(container, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU)
/* Get addition IOMMU info */
ioctl(container, VFIO_IOMMU_GET_INFO, &iommu_info);

3
Documentation/video4linux/CARDLIST.bttv
View File

@ -160,3 +160,6 @@
159 -> ProVideo PV183 [1830:1540,1831:1540,1832:1540,1833:1540,1834:1540,1835:1540,1836:1540,1837:1540]
160 -> Tongwei Video Technology TD-3116 [f200:3116]
161 -> Aposonic W-DVR [0279:0228]
162 -> Adlink MPG24
163 -> Bt848 Capture 14MHz
164 -> CyberVision CV06 (SV)

1
Documentation/video4linux/CARDLIST.saa7134
View File

@ -190,3 +190,4 @@
189 -> Kworld PC150-U [17de:a134]
190 -> Asus My Cinema PS3-100 [1043:48cd]
191 -> Hawell HW-9004V1
192 -> AverMedia AverTV Satellite Hybrid+FM A706 [1461:2055]

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