diff options
Diffstat (limited to 'Documentation')
167 files changed, 4164 insertions, 1040 deletions
diff --git a/Documentation/ABI/testing/dev-kmsg b/Documentation/ABI/testing/dev-kmsg index 7e7e07a82e0e..bb820be48179 100644 --- a/Documentation/ABI/testing/dev-kmsg +++ b/Documentation/ABI/testing/dev-kmsg @@ -92,7 +92,7 @@ Description: The /dev/kmsg character device node provides userspace access The flags field carries '-' by default. A 'c' indicates a fragment of a line. All following fragments are flagged with '+'. Note, that these hints about continuation lines are not - neccessarily correct, and the stream could be interleaved with + necessarily correct, and the stream could be interleaved with unrelated messages, but merging the lines in the output usually produces better human readable results. A similar logic is used internally when messages are printed to the diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 2f06d40fe07d..2e33dc6b2346 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -189,6 +189,14 @@ Description: A computed peak value based on the sum squared magnitude of the underlying value in the specified directions. +What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_raw +What: /sys/bus/iio/devices/iio:deviceX/in_pressure_raw +KernelVersion: 3.8 +Contact: linux-iio@vger.kernel.org +Description: + Raw pressure measurement from channel Y. Units after + application of scale and offset are kilopascal. + What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset @@ -197,6 +205,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset +What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_offset +What: /sys/bus/iio/devices/iio:deviceX/in_pressure_offset KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -226,6 +236,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale +What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale +What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -245,6 +257,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias +What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibbias +What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibbias KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -262,6 +276,8 @@ What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale +What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale +What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -275,6 +291,8 @@ What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available What: /sys/.../iio:deviceX/out_voltageX_scale_available What: /sys/.../iio:deviceX/out_altvoltageX_scale_available What: /sys/.../iio:deviceX/in_capacitance_scale_available +What: /sys/.../iio:deviceX/in_pressure_scale_available +What: /sys/.../iio:deviceX/in_pressureY_scale_available KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -694,6 +712,8 @@ What: /sys/.../buffer/scan_elements/in_voltageY_en What: /sys/.../buffer/scan_elements/in_voltageY-voltageZ_en What: /sys/.../buffer/scan_elements/in_incli_x_en What: /sys/.../buffer/scan_elements/in_incli_y_en +What: /sys/.../buffer/scan_elements/in_pressureY_en +What: /sys/.../buffer/scan_elements/in_pressure_en KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: @@ -707,6 +727,8 @@ What: /sys/.../buffer/scan_elements/in_voltageY_type What: /sys/.../buffer/scan_elements/in_voltage_type What: /sys/.../buffer/scan_elements/in_voltageY_supply_type What: /sys/.../buffer/scan_elements/in_timestamp_type +What: /sys/.../buffer/scan_elements/in_pressureY_type +What: /sys/.../buffer/scan_elements/in_pressure_type KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: @@ -751,6 +773,8 @@ What: /sys/.../buffer/scan_elements/in_magn_z_index What: /sys/.../buffer/scan_elements/in_incli_x_index What: /sys/.../buffer/scan_elements/in_incli_y_index What: /sys/.../buffer/scan_elements/in_timestamp_index +What: /sys/.../buffer/scan_elements/in_pressureY_index +What: /sys/.../buffer/scan_elements/in_pressure_index KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: diff --git a/Documentation/ABI/testing/sysfs-bus-mdio b/Documentation/ABI/testing/sysfs-bus-mdio new file mode 100644 index 000000000000..6349749ebc29 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-mdio @@ -0,0 +1,9 @@ +What: /sys/bus/mdio_bus/devices/.../phy_id +Date: November 2012 +KernelVersion: 3.8 +Contact: netdev@vger.kernel.org +Description: + This attribute contains the 32-bit PHY Identifier as reported + by the device during bus enumeration, encoded in hexadecimal. + This ID is used to match the device with the appropriate + driver. diff --git a/Documentation/ABI/testing/sysfs-class-devfreq b/Documentation/ABI/testing/sysfs-class-devfreq index 23d78b5aab11..0ba6ea2f89d9 100644 --- a/Documentation/ABI/testing/sysfs-class-devfreq +++ b/Documentation/ABI/testing/sysfs-class-devfreq @@ -11,7 +11,7 @@ What: /sys/class/devfreq/.../governor Date: September 2011 Contact: MyungJoo Ham <myungjoo.ham@samsung.com> Description: - The /sys/class/devfreq/.../governor shows the name of the + The /sys/class/devfreq/.../governor show or set the name of the governor used by the corresponding devfreq object. What: /sys/class/devfreq/.../cur_freq @@ -19,15 +19,16 @@ Date: September 2011 Contact: MyungJoo Ham <myungjoo.ham@samsung.com> Description: The /sys/class/devfreq/.../cur_freq shows the current - frequency of the corresponding devfreq object. + frequency of the corresponding devfreq object. Same as + target_freq when get_cur_freq() is not implemented by + devfreq driver. -What: /sys/class/devfreq/.../central_polling -Date: September 2011 -Contact: MyungJoo Ham <myungjoo.ham@samsung.com> +What: /sys/class/devfreq/.../target_freq +Date: September 2012 +Contact: Rajagopal Venkat <rajagopal.venkat@linaro.org> Description: - The /sys/class/devfreq/.../central_polling shows whether - the devfreq ojbect is using devfreq-provided central - polling mechanism or not. + The /sys/class/devfreq/.../target_freq shows the next governor + predicted target frequency of the corresponding devfreq object. What: /sys/class/devfreq/.../polling_interval Date: September 2011 @@ -43,6 +44,17 @@ Description: (/sys/class/devfreq/.../central_polling is 0), this value may be useless. +What: /sys/class/devfreq/.../trans_stat +Date: October 2012 +Contact: MyungJoo Ham <myungjoo.ham@samsung.com> +Descrtiption: + This ABI shows the statistics of devfreq behavior on a + specific device. It shows the time spent in each state and + the number of transitions between states. + In order to activate this ABI, the devfreq target device + driver should provide the list of available frequencies + with its profile. + What: /sys/class/devfreq/.../userspace/set_freq Date: September 2011 Contact: MyungJoo Ham <myungjoo.ham@samsung.com> @@ -50,3 +62,19 @@ Description: The /sys/class/devfreq/.../userspace/set_freq shows and sets the requested frequency for the devfreq object if userspace governor is in effect. + +What: /sys/class/devfreq/.../available_frequencies +Date: October 2012 +Contact: Nishanth Menon <nm@ti.com> +Description: + The /sys/class/devfreq/.../available_frequencies shows + the available frequencies of the corresponding devfreq object. + This is a snapshot of available frequencies and not limited + by the min/max frequency restrictions. + +What: /sys/class/devfreq/.../available_governors +Date: October 2012 +Contact: Nishanth Menon <nm@ti.com> +Description: + The /sys/class/devfreq/.../available_governors shows + currently available governors in the system. diff --git a/Documentation/ABI/testing/sysfs-class-net-batman-adv b/Documentation/ABI/testing/sysfs-class-net-batman-adv index 38dd762def4b..bdc00707c751 100644 --- a/Documentation/ABI/testing/sysfs-class-net-batman-adv +++ b/Documentation/ABI/testing/sysfs-class-net-batman-adv @@ -1,4 +1,10 @@ +What: /sys/class/net/<iface>/batman-adv/iface_status +Date: May 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Indicates the status of <iface> as it is seen by batman. + What: /sys/class/net/<iface>/batman-adv/mesh_iface Date: May 2010 Contact: Marek Lindner <lindner_marek@yahoo.de> @@ -7,8 +13,3 @@ Description: displays the batman mesh interface this <iface> currently is associated with. -What: /sys/class/net/<iface>/batman-adv/iface_status -Date: May 2010 -Contact: Marek Lindner <lindner_marek@yahoo.de> -Description: - Indicates the status of <iface> as it is seen by batman. diff --git a/Documentation/ABI/testing/sysfs-class-net-grcan b/Documentation/ABI/testing/sysfs-class-net-grcan new file mode 100644 index 000000000000..f418c92ca555 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-net-grcan @@ -0,0 +1,35 @@ + +What: /sys/class/net/<iface>/grcan/enable0 +Date: October 2012 +KernelVersion: 3.8 +Contact: Andreas Larsson <andreas@gaisler.com> +Description: + Hardware configuration of physical interface 0. This file reads + and writes the "Enable 0" bit of the configuration register. + Possible values: 0 or 1. See the GRCAN chapter of the GRLIB IP + core library documentation for details. The default value is 0 + or set by the module parameter grcan.enable0 and can be read at + /sys/module/grcan/parameters/enable0. + +What: /sys/class/net/<iface>/grcan/enable1 +Date: October 2012 +KernelVersion: 3.8 +Contact: Andreas Larsson <andreas@gaisler.com> +Description: + Hardware configuration of physical interface 1. This file reads + and writes the "Enable 1" bit of the configuration register. + Possible values: 0 or 1. See the GRCAN chapter of the GRLIB IP + core library documentation for details. The default value is 0 + or set by the module parameter grcan.enable1 and can be read at + /sys/module/grcan/parameters/enable1. + +What: /sys/class/net/<iface>/grcan/select +Date: October 2012 +KernelVersion: 3.8 +Contact: Andreas Larsson <andreas@gaisler.com> +Description: + Configuration of which physical interface to be used. Possible + values: 0 or 1. See the GRCAN chapter of the GRLIB IP core + library documentation for details. The default value is 0 or is + set by the module parameter grcan.select and can be read at + /sys/module/grcan/parameters/select. diff --git a/Documentation/ABI/testing/sysfs-class-net-mesh b/Documentation/ABI/testing/sysfs-class-net-mesh index c81fe89c4c46..bc41da61608d 100644 --- a/Documentation/ABI/testing/sysfs-class-net-mesh +++ b/Documentation/ABI/testing/sysfs-class-net-mesh @@ -6,6 +6,14 @@ Description: Indicates whether the batman protocol messages of the mesh <mesh_iface> shall be aggregated or not. +What: /sys/class/net/<mesh_iface>/mesh/ap_isolation +Date: May 2011 +Contact: Antonio Quartulli <ordex@autistici.org> +Description: + Indicates whether the data traffic going from a + wireless client to another wireless client will be + silently dropped. + What: /sys/class/net/<mesh_iface>/mesh/bonding Date: June 2010 Contact: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> @@ -31,14 +39,6 @@ Description: mesh will be fragmented or silently discarded if the packet size exceeds the outgoing interface MTU. -What: /sys/class/net/<mesh_iface>/mesh/ap_isolation -Date: May 2011 -Contact: Antonio Quartulli <ordex@autistici.org> -Description: - Indicates whether the data traffic going from a - wireless client to another wireless client will be - silently dropped. - What: /sys/class/net/<mesh_iface>/mesh/gw_bandwidth Date: October 2010 Contact: Marek Lindner <lindner_marek@yahoo.de> @@ -60,6 +60,13 @@ Description: Defines the selection criteria this node will use to choose a gateway if gw_mode was set to 'client'. +What: /sys/class/net/<mesh_iface>/mesh/hop_penalty +Date: Oct 2010 +Contact: Linus Lüssing <linus.luessing@web.de> +Description: + Defines the penalty which will be applied to an + originator message's tq-field on every hop. + What: /sys/class/net/<mesh_iface>/mesh/orig_interval Date: May 2010 Contact: Marek Lindner <lindner_marek@yahoo.de> @@ -67,19 +74,12 @@ Description: Defines the interval in milliseconds in which batman sends its protocol messages. -What: /sys/class/net/<mesh_iface>/mesh/hop_penalty -Date: Oct 2010 -Contact: Linus Lüssing <linus.luessing@web.de> -Description: - Defines the penalty which will be applied to an - originator message's tq-field on every hop. - -What: /sys/class/net/<mesh_iface>/mesh/routing_algo -Date: Dec 2011 -Contact: Marek Lindner <lindner_marek@yahoo.de> +What: /sys/class/net/<mesh_iface>/mesh/routing_algo +Date: Dec 2011 +Contact: Marek Lindner <lindner_marek@yahoo.de> Description: - Defines the routing procotol this mesh instance - uses to find the optimal paths through the mesh. + Defines the routing procotol this mesh instance + uses to find the optimal paths through the mesh. What: /sys/class/net/<mesh_iface>/mesh/vis_mode Date: May 2010 diff --git a/Documentation/ABI/testing/sysfs-devices-power b/Documentation/ABI/testing/sysfs-devices-power index 45000f0db4d4..9d43e7670841 100644 --- a/Documentation/ABI/testing/sysfs-devices-power +++ b/Documentation/ABI/testing/sysfs-devices-power @@ -164,7 +164,7 @@ Contact: Rafael J. Wysocki <rjw@sisk.pl> Description: The /sys/devices/.../wakeup_prevent_sleep_time_ms attribute contains the total time the device has been preventing - opportunistic transitions to sleep states from occuring. + opportunistic transitions to sleep states from occurring. This attribute is read-only. If the device is not enabled to wake up the system from sleep states, this attribute is not present. @@ -204,3 +204,34 @@ Description: This attribute has no effect on system-wide suspend/resume and hibernation. + +What: /sys/devices/.../power/pm_qos_no_power_off +Date: September 2012 +Contact: Rafael J. Wysocki <rjw@sisk.pl> +Description: + The /sys/devices/.../power/pm_qos_no_power_off attribute + is used for manipulating the PM QoS "no power off" flag. If + set, this flag indicates to the kernel that power should not + be removed entirely from the device. + + Not all drivers support this attribute. If it isn't supported, + it is not present. + + This attribute has no effect on system-wide suspend/resume and + hibernation. + +What: /sys/devices/.../power/pm_qos_remote_wakeup +Date: September 2012 +Contact: Rafael J. Wysocki <rjw@sisk.pl> +Description: + The /sys/devices/.../power/pm_qos_remote_wakeup attribute + is used for manipulating the PM QoS "remote wakeup required" + flag. If set, this flag indicates to the kernel that the + device is a source of user events that have to be signaled from + its low-power states. + + Not all drivers support this attribute. If it isn't supported, + it is not present. + + This attribute has no effect on system-wide suspend/resume and + hibernation. diff --git a/Documentation/ABI/testing/sysfs-devices-sun b/Documentation/ABI/testing/sysfs-devices-sun new file mode 100644 index 000000000000..86be9848a77e --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-sun @@ -0,0 +1,14 @@ +Whatt: /sys/devices/.../sun +Date: October 2012 +Contact: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> +Description: + The file contains a Slot-unique ID which provided by the _SUN + method in the ACPI namespace. The value is written in Advanced + Configuration and Power Interface Specification as follows: + + "The _SUN value is required to be unique among the slots of + the same type. It is also recommended that this number match + the slot number printed on the physical slot whenever possible." + + So reading the sysfs file, we can identify a physical position + of the slot in the system. diff --git a/Documentation/ABI/testing/sysfs-driver-ppi b/Documentation/ABI/testing/sysfs-driver-ppi index 97a003ee058b..7d1435bc976c 100644 --- a/Documentation/ABI/testing/sysfs-driver-ppi +++ b/Documentation/ABI/testing/sysfs-driver-ppi @@ -5,7 +5,7 @@ Contact: xiaoyan.zhang@intel.com Description: This folder includes the attributes related with PPI (Physical Presence Interface). Only if TPM is supported by BIOS, this - folder makes sence. The folder path can be got by command + folder makes sense. The folder path can be got by command 'find /sys/ -name 'pcrs''. For the detail information of PPI, please refer to the PPI specification from http://www.trustedcomputinggroup.org/ diff --git a/Documentation/ABI/testing/sysfs-profiling b/Documentation/ABI/testing/sysfs-profiling index b02d8b8c173a..8a8e466eb2c0 100644 --- a/Documentation/ABI/testing/sysfs-profiling +++ b/Documentation/ABI/testing/sysfs-profiling @@ -1,13 +1,13 @@ -What: /sys/kernel/profile +What: /sys/kernel/profiling Date: September 2008 Contact: Dave Hansen <dave@linux.vnet.ibm.com> Description: - /sys/kernel/profile is the runtime equivalent + /sys/kernel/profiling is the runtime equivalent of the boot-time profile= option. You can get the same effect running: - echo 2 > /sys/kernel/profile + echo 2 > /sys/kernel/profiling as you would by issuing profile=2 on the boot command line. diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty index 0c430150d929..ad22fb0ee765 100644 --- a/Documentation/ABI/testing/sysfs-tty +++ b/Documentation/ABI/testing/sysfs-tty @@ -26,3 +26,115 @@ Description: UART port in serial_core, that is bound to TTY like ttyS0. uartclk = 16 * baud_base + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/type +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Shows the current tty type for this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/line +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Shows the current tty line number for this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/port +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Shows the current tty port I/O address for this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/irq +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Shows the current primary interrupt for this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/flags +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Show the tty port status flags for this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/xmit_fifo_size +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Show the transmit FIFO size for this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/close_delay +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Show the closing delay time for this port in ms. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/closing_wait +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Show the close wait time for this port in ms. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/custom_divisor +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Show the custom divisor if any that is set on this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/io_type +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Show the I/O type that is to be used with the iomem base + address. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/iomem_base +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + The I/O memory base for this port. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. + +What: /sys/class/tty/ttyS0/iomem_reg_shift +Date: October 2012 +Contact: Alan Cox <alan@linux.intel.com> +Description: + Show the register shift indicating the spacing to be used + for accesses on this iomem address. + + These sysfs values expose the TIOCGSERIAL interface via + sysfs rather than via ioctls. diff --git a/Documentation/DocBook/gadget.tmpl b/Documentation/DocBook/gadget.tmpl index 6ef2f0073e5a..4017f147ba2f 100644 --- a/Documentation/DocBook/gadget.tmpl +++ b/Documentation/DocBook/gadget.tmpl @@ -671,7 +671,7 @@ than a kernel driver. <para>There's a USB Mass Storage class driver, which provides a different solution for interoperability with systems such as MS-Windows and MacOS. -That <emphasis>File-backed Storage</emphasis> driver uses a +That <emphasis>Mass Storage</emphasis> driver uses a file or block device as backing store for a drive, like the <filename>loop</filename> driver. The USB host uses the BBB, CB, or CBI versions of the mass diff --git a/Documentation/DocBook/uio-howto.tmpl b/Documentation/DocBook/uio-howto.tmpl index ac3d0018140c..ddb05e98af0d 100644 --- a/Documentation/DocBook/uio-howto.tmpl +++ b/Documentation/DocBook/uio-howto.tmpl @@ -719,6 +719,62 @@ framework to set up sysfs files for this region. Simply leave it alone. </para> </sect1> +<sect1 id="using uio_dmem_genirq"> +<title>Using uio_dmem_genirq for platform devices</title> + <para> + In addition to statically allocated memory ranges, they may also be + a desire to use dynamically allocated regions in a user space driver. + In particular, being able to access memory made available through the + dma-mapping API, may be particularly useful. The + <varname>uio_dmem_genirq</varname> driver provides a way to accomplish + this. + </para> + <para> + This driver is used in a similar manner to the + <varname>"uio_pdrv_genirq"</varname> driver with respect to interrupt + configuration and handling. + </para> + <para> + Set the <varname>.name</varname> element of + <varname>struct platform_device</varname> to + <varname>"uio_dmem_genirq"</varname> to use this driver. + </para> + <para> + When using this driver, fill in the <varname>.platform_data</varname> + element of <varname>struct platform_device</varname>, which is of type + <varname>struct uio_dmem_genirq_pdata</varname> and which contains the + following elements: + </para> + <itemizedlist> + <listitem><varname>struct uio_info uioinfo</varname>: The same + structure used as the <varname>uio_pdrv_genirq</varname> platform + data</listitem> + <listitem><varname>unsigned int *dynamic_region_sizes</varname>: + Pointer to list of sizes of dynamic memory regions to be mapped into + user space. + </listitem> + <listitem><varname>unsigned int num_dynamic_regions</varname>: + Number of elements in <varname>dynamic_region_sizes</varname> array. + </listitem> + </itemizedlist> + <para> + The dynamic regions defined in the platform data will be appended to + the <varname> mem[] </varname> array after the platform device + resources, which implies that the total number of static and dynamic + memory regions cannot exceed <varname>MAX_UIO_MAPS</varname>. + </para> + <para> + The dynamic memory regions will be allocated when the UIO device file, + <varname>/dev/uioX</varname> is opened. + Simiar to static memory resources, the memory region information for + dynamic regions is then visible via sysfs at + <varname>/sys/class/uio/uioX/maps/mapY/*</varname>. + The dynmaic memory regions will be freed when the UIO device file is + closed. When no processes are holding the device file open, the address + returned to userspace is ~0. + </para> +</sect1> + </chapter> <chapter id="userspace_driver" xreflabel="Writing a driver in user space"> diff --git a/Documentation/DocBook/writing-an-alsa-driver.tmpl b/Documentation/DocBook/writing-an-alsa-driver.tmpl index cab4ec58e46e..fb32aead5a0b 100644 --- a/Documentation/DocBook/writing-an-alsa-driver.tmpl +++ b/Documentation/DocBook/writing-an-alsa-driver.tmpl @@ -433,9 +433,9 @@ /* chip-specific constructor * (see "Management of Cards and Components") */ - static int __devinit snd_mychip_create(struct snd_card *card, - struct pci_dev *pci, - struct mychip **rchip) + static int snd_mychip_create(struct snd_card *card, + struct pci_dev *pci, + struct mychip **rchip) { struct mychip *chip; int err; @@ -475,8 +475,8 @@ } /* constructor -- see "Constructor" sub-section */ - static int __devinit snd_mychip_probe(struct pci_dev *pci, - const struct pci_device_id *pci_id) + static int snd_mychip_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) { static int dev; struct snd_card *card; @@ -526,7 +526,7 @@ } /* destructor -- see the "Destructor" sub-section */ - static void __devexit snd_mychip_remove(struct pci_dev *pci) + static void snd_mychip_remove(struct pci_dev *pci) { snd_card_free(pci_get_drvdata(pci)); pci_set_drvdata(pci, NULL); @@ -542,9 +542,8 @@ <para> The real constructor of PCI drivers is the <function>probe</function> callback. The <function>probe</function> callback and other component-constructors which are called - from the <function>probe</function> callback should be defined with - the <parameter>__devinit</parameter> prefix. You - cannot use the <parameter>__init</parameter> prefix for them, + from the <function>probe</function> callback cannot be used with + the <parameter>__init</parameter> prefix because any PCI device could be a hotplug device. </para> @@ -728,7 +727,7 @@ <informalexample> <programlisting> <![CDATA[ - static void __devexit snd_mychip_remove(struct pci_dev *pci) + static void snd_mychip_remove(struct pci_dev *pci) { snd_card_free(pci_get_drvdata(pci)); pci_set_drvdata(pci, NULL); @@ -1059,14 +1058,6 @@ </para> <para> - As further notes, the destructors (both - <function>snd_mychip_dev_free</function> and - <function>snd_mychip_free</function>) cannot be defined with - the <parameter>__devexit</parameter> prefix, because they may be - called from the constructor, too, at the false path. - </para> - - <para> For a device which allows hotplugging, you can use <function>snd_card_free_when_closed</function>. This one will postpone the destruction until all devices are closed. @@ -1120,9 +1111,9 @@ } /* chip-specific constructor */ - static int __devinit snd_mychip_create(struct snd_card *card, - struct pci_dev *pci, - struct mychip **rchip) + static int snd_mychip_create(struct snd_card *card, + struct pci_dev *pci, + struct mychip **rchip) { struct mychip *chip; int err; @@ -1200,7 +1191,7 @@ .name = KBUILD_MODNAME, .id_table = snd_mychip_ids, .probe = snd_mychip_probe, - .remove = __devexit_p(snd_mychip_remove), + .remove = snd_mychip_remove, }; /* module initialization */ @@ -1465,11 +1456,6 @@ </para> <para> - Again, remember that you cannot - use the <parameter>__devexit</parameter> prefix for this destructor. - </para> - - <para> We didn't implement the hardware disabling part in the above. If you need to do this, please note that the destructor may be called even before the initialization of the chip is completed. @@ -1619,7 +1605,7 @@ .name = KBUILD_MODNAME, .id_table = snd_mychip_ids, .probe = snd_mychip_probe, - .remove = __devexit_p(snd_mychip_remove), + .remove = snd_mychip_remove, }; ]]> </programlisting> @@ -1630,11 +1616,7 @@ The <structfield>probe</structfield> and <structfield>remove</structfield> functions have already been defined in the previous sections. - The <structfield>remove</structfield> function should - be defined with the - <function>__devexit_p()</function> macro, so that it's not - defined for built-in (and non-hot-pluggable) case. The - <structfield>name</structfield> + The <structfield>name</structfield> field is the name string of this device. Note that you must not use a slash <quote>/</quote> in this string. </para> @@ -1665,9 +1647,7 @@ <para> Note that these module entries are tagged with <parameter>__init</parameter> and - <parameter>__exit</parameter> prefixes, not - <parameter>__devinit</parameter> nor - <parameter>__devexit</parameter>. + <parameter>__exit</parameter> prefixes. </para> <para> @@ -1918,7 +1898,7 @@ */ /* create a pcm device */ - static int __devinit snd_mychip_new_pcm(struct mychip *chip) + static int snd_mychip_new_pcm(struct mychip *chip) { struct snd_pcm *pcm; int err; @@ -1957,7 +1937,7 @@ <informalexample> <programlisting> <![CDATA[ - static int __devinit snd_mychip_new_pcm(struct mychip *chip) + static int snd_mychip_new_pcm(struct mychip *chip) { struct snd_pcm *pcm; int err; @@ -2124,7 +2104,7 @@ .... } - static int __devinit snd_mychip_new_pcm(struct mychip *chip) + static int snd_mychip_new_pcm(struct mychip *chip) { struct snd_pcm *pcm; .... @@ -3399,7 +3379,7 @@ struct _snd_pcm_runtime { <title>Definition of a Control</title> <programlisting> <![CDATA[ - static struct snd_kcontrol_new my_control __devinitdata = { + static struct snd_kcontrol_new my_control = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "PCM Playback Switch", .index = 0, @@ -3415,13 +3395,6 @@ struct _snd_pcm_runtime { </para> <para> - Most likely the control is created via - <function>snd_ctl_new1()</function>, and in such a case, you can - add the <parameter>__devinitdata</parameter> prefix to the - definition as above. - </para> - - <para> The <structfield>iface</structfield> field specifies the control type, <constant>SNDRV_CTL_ELEM_IFACE_XXX</constant>, which is usually <constant>MIXER</constant>. @@ -3847,10 +3820,8 @@ struct _snd_pcm_runtime { <para> <function>snd_ctl_new1()</function> allocates a new - <structname>snd_kcontrol</structname> instance (that's why the definition - of <parameter>my_control</parameter> can be with - the <parameter>__devinitdata</parameter> - prefix), and <function>snd_ctl_add</function> assigns the given + <structname>snd_kcontrol</structname> instance, + and <function>snd_ctl_add</function> assigns the given control component to the card. </para> </section> @@ -3896,7 +3867,7 @@ struct _snd_pcm_runtime { <![CDATA[ static DECLARE_TLV_DB_SCALE(db_scale_my_control, -4050, 150, 0); - static struct snd_kcontrol_new my_control __devinitdata = { + static struct snd_kcontrol_new my_control = { ... .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, @@ -5761,8 +5732,8 @@ struct _snd_pcm_runtime { <informalexample> <programlisting> <![CDATA[ - static int __devinit snd_mychip_probe(struct pci_dev *pci, - const struct pci_device_id *pci_id) + static int snd_mychip_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) { .... struct snd_card *card; @@ -5787,8 +5758,8 @@ struct _snd_pcm_runtime { <informalexample> <programlisting> <![CDATA[ - static int __devinit snd_mychip_probe(struct pci_dev *pci, - const struct pci_device_id *pci_id) + static int snd_mychip_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) { .... struct snd_card *card; @@ -5825,7 +5796,7 @@ struct _snd_pcm_runtime { .name = KBUILD_MODNAME, .id_table = snd_my_ids, .probe = snd_my_probe, - .remove = __devexit_p(snd_my_remove), + .remove = snd_my_remove, #ifdef CONFIG_PM .suspend = snd_my_suspend, .resume = snd_my_resume, diff --git a/Documentation/HOWTO b/Documentation/HOWTO index 59c080f084ef..a9f288ff54f9 100644 --- a/Documentation/HOWTO +++ b/Documentation/HOWTO @@ -462,7 +462,7 @@ Differences between the kernel community and corporate structures The kernel community works differently than most traditional corporate development environments. Here are a list of things that you can try to -do to try to avoid problems: +do to avoid problems: Good things to say regarding your proposed changes: - "This solves multiple problems." - "This deletes 2000 lines of code." diff --git a/Documentation/IRQ-domain.txt b/Documentation/IRQ-domain.txt index 1401cece745a..9bc95942ec22 100644 --- a/Documentation/IRQ-domain.txt +++ b/Documentation/IRQ-domain.txt @@ -7,6 +7,21 @@ systems with multiple interrupt controllers the kernel must ensure that each one gets assigned non-overlapping allocations of Linux IRQ numbers. +The number of interrupt controllers registered as unique irqchips +show a rising tendency: for example subdrivers of different kinds +such as GPIO controllers avoid reimplementing identical callback +mechanisms as the IRQ core system by modelling their interrupt +handlers as irqchips, i.e. in effect cascading interrupt controllers. + +Here the interrupt number loose all kind of correspondence to +hardware interrupt numbers: whereas in the past, IRQ numbers could +be chosen so they matched the hardware IRQ line into the root +interrupt controller (i.e. the component actually fireing the +interrupt line to the CPU) nowadays this number is just a number. + +For this reason we need a mechanism to separate controller-local +interrupt numbers, called hardware irq's, from Linux IRQ numbers. + The irq_alloc_desc*() and irq_free_desc*() APIs provide allocation of irq numbers, but they don't provide any support for reverse mapping of the controller-local IRQ (hwirq) number into the Linux IRQ number @@ -40,6 +55,10 @@ required hardware setup. When an interrupt is received, irq_find_mapping() function should be used to find the Linux IRQ number from the hwirq number. +The irq_create_mapping() function must be called *atleast once* +before any call to irq_find_mapping(), lest the descriptor will not +be allocated. + If the driver has the Linux IRQ number or the irq_data pointer, and needs to know the associated hwirq number (such as in the irq_chip callbacks) then it can be directly obtained from irq_data->hwirq. @@ -119,4 +138,17 @@ numbers. Most users of legacy mappings should use irq_domain_add_simple() which will use a legacy domain only if an IRQ range is supplied by the -system and will otherwise use a linear domain mapping. +system and will otherwise use a linear domain mapping. The semantics +of this call are such that if an IRQ range is specified then +descriptors will be allocated on-the-fly for it, and if no range is +specified it will fall through to irq_domain_add_linear() which meand +*no* irq descriptors will be allocated. + +A typical use case for simple domains is where an irqchip provider +is supporting both dynamic and static IRQ assignments. + +In order to avoid ending up in a situation where a linear domain is +used and no descriptor gets allocated it is very important to make sure +that the driver using the simple domain call irq_create_mapping() +before any irq_find_mapping() since the latter will actually work +for the static IRQ assignment case. diff --git a/Documentation/RCU/RTFP.txt b/Documentation/RCU/RTFP.txt index 7c1dfb19fc40..7f40c72a9c51 100644 --- a/Documentation/RCU/RTFP.txt +++ b/Documentation/RCU/RTFP.txt @@ -186,7 +186,7 @@ Bibtex Entries @article{Kung80 ,author="H. T. Kung and Q. Lehman" -,title="Concurrent Maintenance of Binary Search Trees" +,title="Concurrent Manipulation of Binary Search Trees" ,Year="1980" ,Month="September" ,journal="ACM Transactions on Database Systems" diff --git a/Documentation/RCU/checklist.txt b/Documentation/RCU/checklist.txt index cdb20d41a44a..31ef8fe07f82 100644 --- a/Documentation/RCU/checklist.txt +++ b/Documentation/RCU/checklist.txt @@ -271,15 +271,14 @@ over a rather long period of time, but improvements are always welcome! The same cautions apply to call_rcu_bh() and call_rcu_sched(). 9. All RCU list-traversal primitives, which include - rcu_dereference(), list_for_each_entry_rcu(), - list_for_each_continue_rcu(), and list_for_each_safe_rcu(), - must be either within an RCU read-side critical section or - must be protected by appropriate update-side locks. RCU - read-side critical sections are delimited by rcu_read_lock() - and rcu_read_unlock(), or by similar primitives such as - rcu_read_lock_bh() and rcu_read_unlock_bh(), in which case - the matching rcu_dereference() primitive must be used in order - to keep lockdep happy, in this case, rcu_dereference_bh(). + rcu_dereference(), list_for_each_entry_rcu(), and + list_for_each_safe_rcu(), must be either within an RCU read-side + critical section or must be protected by appropriate update-side + locks. RCU read-side critical sections are delimited by + rcu_read_lock() and rcu_read_unlock(), or by similar primitives + such as rcu_read_lock_bh() and rcu_read_unlock_bh(), in which + case the matching rcu_dereference() primitive must be used in + order to keep lockdep happy, in this case, rcu_dereference_bh(). The reason that it is permissible to use RCU list-traversal primitives when the update-side lock is held is that doing so diff --git a/Documentation/RCU/listRCU.txt b/Documentation/RCU/listRCU.txt index 4349c1487e91..adb5a3782846 100644 --- a/Documentation/RCU/listRCU.txt +++ b/Documentation/RCU/listRCU.txt @@ -205,7 +205,7 @@ RCU ("read-copy update") its name. The RCU code is as follows: audit_copy_rule(&ne->rule, &e->rule); ne->rule.action = newaction; ne->rule.file_count = newfield_count; - list_replace_rcu(e, ne); + list_replace_rcu(&e->list, &ne->list); call_rcu(&e->rcu, audit_free_rule); return 0; } diff --git a/Documentation/RCU/rcuref.txt b/Documentation/RCU/rcuref.txt index 4202ad093130..141d531aa14b 100644 --- a/Documentation/RCU/rcuref.txt +++ b/Documentation/RCU/rcuref.txt @@ -20,7 +20,7 @@ release_referenced() delete() { { ... write_lock(&list_lock); atomic_dec(&el->rc, relfunc) ... - ... delete_element + ... remove_element } write_unlock(&list_lock); ... if (atomic_dec_and_test(&el->rc)) @@ -52,7 +52,7 @@ release_referenced() delete() { { ... spin_lock(&list_lock); if (atomic_dec_and_test(&el->rc)) ... - call_rcu(&el->head, el_free); delete_element + call_rcu(&el->head, el_free); remove_element ... spin_unlock(&list_lock); } ... if (atomic_dec_and_test(&el->rc)) @@ -64,3 +64,60 @@ Sometimes, a reference to the element needs to be obtained in the update (write) stream. In such cases, atomic_inc_not_zero() might be overkill, since we hold the update-side spinlock. One might instead use atomic_inc() in such cases. + +It is not always convenient to deal with "FAIL" in the +search_and_reference() code path. In such cases, the +atomic_dec_and_test() may be moved from delete() to el_free() +as follows: + +1. 2. +add() search_and_reference() +{ { + alloc_object rcu_read_lock(); + ... search_for_element + atomic_set(&el->rc, 1); atomic_inc(&el->rc); + spin_lock(&list_lock); ... + + add_element rcu_read_unlock(); + ... } + spin_unlock(&list_lock); 4. +} delete() +3. { +release_referenced() spin_lock(&list_lock); +{ ... + ... remove_element + if (atomic_dec_and_test(&el->rc)) spin_unlock(&list_lock); + kfree(el); ... + ... call_rcu(&el->head, el_free); +} ... +5. } +void el_free(struct rcu_head *rhp) +{ + release_referenced(); +} + +The key point is that the initial reference added by add() is not removed +until after a grace period has elapsed following removal. This means that +search_and_reference() cannot find this element, which means that the value +of el->rc cannot increase. Thus, once it reaches zero, there are no +readers that can or ever will be able to reference the element. The +element can therefore safely be freed. This in turn guarantees that if +any reader finds the element, that reader may safely acquire a reference +without checking the value of the reference counter. + +In cases where delete() can sleep, synchronize_rcu() can be called from +delete(), so that el_free() can be subsumed into delete as follows: + +4. +delete() +{ + spin_lock(&list_lock); + ... + remove_element + spin_unlock(&list_lock); + ... + synchronize_rcu(); + if (atomic_dec_and_test(&el->rc)) + kfree(el); + ... +} diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt index 672d19083252..c776968f4463 100644 --- a/Documentation/RCU/trace.txt +++ b/Documentation/RCU/trace.txt @@ -10,51 +10,63 @@ for rcutree and next for rcutiny. CONFIG_TREE_RCU and CONFIG_TREE_PREEMPT_RCU debugfs Files and Formats -These implementations of RCU provides several debugfs files under the +These implementations of RCU provide several debugfs directories under the top-level directory "rcu": -rcu/rcudata: +rcu/rcu_bh +rcu/rcu_preempt +rcu/rcu_sched + +Each directory contains files for the corresponding flavor of RCU. +Note that rcu/rcu_preempt is only present for CONFIG_TREE_PREEMPT_RCU. +For CONFIG_TREE_RCU, the RCU flavor maps onto the RCU-sched flavor, +so that activity for both appears in rcu/rcu_sched. + +In addition, the following file appears in the top-level directory: +rcu/rcutorture. This file displays rcutorture test progress. The output +of "cat rcu/rcutorture" looks as follows: + +rcutorture test sequence: 0 (test in progress) +rcutorture update version number: 615 + +The first line shows the number of rcutorture tests that have completed +since boot. If a test is currently running, the "(test in progress)" +string will appear as shown above. The second line shows the number of +update cycles that the current test has started, or zero if there is +no test in progress. + + +Within each flavor directory (rcu/rcu_bh, rcu/rcu_sched, and possibly +also rcu/rcu_preempt) the following files will be present: + +rcudata: Displays fields in struct rcu_data. -rcu/rcudata.csv: - Comma-separated values spreadsheet version of rcudata. -rcu/rcugp: +rcuexp: + Displays statistics for expedited grace periods. +rcugp: Displays grace-period counters. -rcu/rcuhier: +rcuhier: Displays the struct rcu_node hierarchy. -rcu/rcu_pending: +rcu_pending: Displays counts of the reasons rcu_pending() decided that RCU had work to do. -rcu/rcutorture: - Displays rcutorture test progress. -rcu/rcuboost: +rcuboost: Displays RCU boosting statistics. Only present if CONFIG_RCU_BOOST=y. -The output of "cat rcu/rcudata" looks as follows: - -rcu_sched: - 0 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=545/1/0 df=50 of=0 ql=163 qs=NRW. kt=0/W/0 ktl=ebc3 b=10 ci=153737 co=0 ca=0 - 1 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=967/1/0 df=58 of=0 ql=634 qs=NRW. kt=0/W/1 ktl=58c b=10 ci=191037 co=0 ca=0 - 2 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=1081/1/0 df=175 of=0 ql=74 qs=N.W. kt=0/W/2 ktl=da94 b=10 ci=75991 co=0 ca=0 - 3 c=20942 g=20943 pq=1 pgp=20942 qp=1 dt=1846/0/0 df=404 of=0 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=72261 co=0 ca=0 - 4 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=369/1/0 df=83 of=0 ql=48 qs=N.W. kt=0/W/4 ktl=e0e7 b=10 ci=128365 co=0 ca=0 - 5 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=381/1/0 df=64 of=0 ql=169 qs=NRW. kt=0/W/5 ktl=fb2f b=10 ci=164360 co=0 ca=0 - 6 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=1037/1/0 df=183 of=0 ql=62 qs=N.W. kt=0/W/6 ktl=d2ad b=10 ci=65663 co=0 ca=0 - 7 c=20897 g=20897 pq=1 pgp=20896 qp=0 dt=1572/0/0 df=382 of=0 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=75006 co=0 ca=0 -rcu_bh: - 0 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=545/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/0 ktl=ebc3 b=10 ci=0 co=0 ca=0 - 1 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=967/1/0 df=3 of=0 ql=0 qs=.... kt=0/W/1 ktl=58c b=10 ci=151 co=0 ca=0 - 2 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1081/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/2 ktl=da94 b=10 ci=0 co=0 ca=0 - 3 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1846/0/0 df=8 of=0 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=0 co=0 ca=0 - 4 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=369/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/4 ktl=e0e7 b=10 ci=0 co=0 ca=0 - 5 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=381/1/0 df=4 of=0 ql=0 qs=.... kt=0/W/5 ktl=fb2f b=10 ci=0 co=0 ca=0 - 6 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1037/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/6 ktl=d2ad b=10 ci=0 co=0 ca=0 - 7 c=1474 g=1474 pq=1 pgp=1473 qp=0 dt=1572/0/0 df=8 of=0 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=0 co=0 ca=0 - -The first section lists the rcu_data structures for rcu_sched, the second -for rcu_bh. Note that CONFIG_TREE_PREEMPT_RCU kernels will have an -additional section for rcu_preempt. Each section has one line per CPU, -or eight for this 8-CPU system. The fields are as follows: +The output of "cat rcu/rcu_preempt/rcudata" looks as follows: + + 0!c=30455 g=30456 pq=1 qp=1 dt=126535/140000000000000/0 df=2002 of=4 ql=0/0 qs=N... b=10 ci=74572 nci=0 co=1131 ca=716 + 1!c=30719 g=30720 pq=1 qp=0 dt=132007/140000000000000/0 df=1874 of=10 ql=0/0 qs=N... b=10 ci=123209 nci=0 co=685 ca=982 + 2!c=30150 g=30151 pq=1 qp=1 dt=138537/140000000000000/0 df=1707 of=8 ql=0/0 qs=N... b=10 ci=80132 nci=0 co=1328 ca=1458 + 3 c=31249 g=31250 pq=1 qp=0 dt=107255/140000000000000/0 df=1749 of=6 ql=0/450 qs=NRW. b=10 ci=151700 nci=0 co=509 ca=622 + 4!c=29502 g=29503 pq=1 qp=1 dt=83647/140000000000000/0 df=965 of=5 ql=0/0 qs=N... b=10 ci=65643 nci=0 co=1373 ca=1521 + 5 c=31201 g=31202 pq=1 qp=1 dt=70422/0/0 df=535 of=7 ql=0/0 qs=.... b=10 ci=58500 nci=0 co=764 ca=698 + 6!c=30253 g=30254 pq=1 qp=1 dt=95363/140000000000000/0 df=780 of=5 ql=0/0 qs=N... b=10 ci=100607 nci=0 co=1414 ca=1353 + 7 c=31178 g=31178 pq=1 qp=0 dt=91536/0/0 df=547 of=4 ql=0/0 qs=.... b=10 ci=109819 nci=0 co=1115 ca=969 + +This file has one line per CPU, or eight for this 8-CPU system. +The fields are as follows: o The number at the beginning of each line is the CPU number. CPUs numbers followed by an exclamation mark are offline, @@ -64,11 +76,13 @@ o The number at the beginning of each line is the CPU number. substantially larger than the number of actual CPUs. o "c" is the count of grace periods that this CPU believes have - completed. Offlined CPUs and CPUs in dynticks idle mode may - lag quite a ways behind, for example, CPU 6 under "rcu_sched" - above, which has been offline through not quite 40,000 RCU grace - periods. It is not unusual to see CPUs lagging by thousands of - grace periods. + completed. Offlined CPUs and CPUs in dynticks idle mode may lag + quite a ways behind, for example, CPU 4 under "rcu_sched" above, + which has been offline through 16 RCU grace periods. It is not + unusual to see offline CPUs lagging by thousands of grace periods. + Note that although the grace-period number is an unsigned long, + it is printed out as a signed long to allow more human-friendly + representation near boot time. o "g" is the count of grace periods that this CPU believes have started. Again, offlined CPUs and CPUs in dynticks idle mode @@ -84,30 +98,25 @@ o "pq" indicates that this CPU has passed through a quiescent state CPU has not yet reported that fact, (2) some other CPU has not yet reported for this grace period, or (3) both. -o "pgp" indicates which grace period the last-observed quiescent - state for this CPU corresponds to. This is important for handling - the race between CPU 0 reporting an extended dynticks-idle - quiescent state for CPU 1 and CPU 1 suddenly waking up and - reporting its own quiescent state. If CPU 1 was the last CPU - for the current grace period, then the CPU that loses this race - will attempt to incorrectly mark CPU 1 as having checked in for - the next grace period! - o "qp" indicates that RCU still expects a quiescent state from this CPU. Offlined CPUs and CPUs in dyntick idle mode might well have qp=1, which is OK: RCU is still ignoring them. o "dt" is the current value of the dyntick counter that is incremented - when entering or leaving dynticks idle state, either by the - scheduler or by irq. This number is even if the CPU is in - dyntick idle mode and odd otherwise. The number after the first - "/" is the interrupt nesting depth when in dyntick-idle state, - or one greater than the interrupt-nesting depth otherwise. - The number after the second "/" is the NMI nesting depth. + when entering or leaving idle, either due to a context switch or + due to an interrupt. This number is even if the CPU is in idle + from RCU's viewpoint and odd otherwise. The number after the + first "/" is the interrupt nesting depth when in idle state, + or a large number added to the interrupt-nesting depth when + running a non-idle task. Some architectures do not accurately + count interrupt nesting when running in non-idle kernel context, + which can result in interesting anomalies such as negative + interrupt-nesting levels. The number after the second "/" + is the NMI nesting depth. o "df" is the number of times that some other CPU has forced a quiescent state on behalf of this CPU due to this CPU being in - dynticks-idle state. + idle state. o "of" is the number of times that some other CPU has forced a quiescent state on behalf of this CPU due to this CPU being @@ -120,9 +129,13 @@ o "of" is the number of times that some other CPU has forced a error, so it makes sense to err conservatively. o "ql" is the number of RCU callbacks currently residing on - this CPU. This is the total number of callbacks, regardless - of what state they are in (new, waiting for grace period to - start, waiting for grace period to end, ready to invoke). + this CPU. The first number is the number of "lazy" callbacks + that are known to RCU to only be freeing memory, and the number + after the "/" is the total number of callbacks, lazy or not. + These counters count callbacks regardless of what phase of + grace-period processing that they are in (new, waiting for + grace period to start, waiting for grace period to end, ready + to invoke). o "qs" gives an indication of the state of the callback queue with four characters: @@ -150,6 +163,43 @@ o "qs" gives an indication of the state of the callback queue If there are no callbacks in a given one of the above states, the corresponding character is replaced by ".". +o "b" is the batch limit for this CPU. If more than this number + of RCU callbacks is ready to invoke, then the remainder will + be deferred. + +o "ci" is the number of RCU callbacks that have been invoked for + this CPU. Note that ci+nci+ql is the number of callbacks that have + been registered in absence of CPU-hotplug activity. + +o "nci" is the number of RCU callbacks that have been offloaded from + this CPU. This will always be zero unless the kernel was built + with CONFIG_RCU_NOCB_CPU=y and the "rcu_nocbs=" kernel boot + parameter was specified. + +o "co" is the number of RCU callbacks that have been orphaned due to + this CPU going offline. These orphaned callbacks have been moved + to an arbitrarily chosen online CPU. + +o "ca" is the number of RCU callbacks that have been adopted by this + CPU due to other CPUs going offline. Note that ci+co-ca+ql is + the number of RCU callbacks registered on this CPU. + + +Kernels compiled with CONFIG_RCU_BOOST=y display the following from +/debug/rcu/rcu_preempt/rcudata: + + 0!c=12865 g=12866 pq=1 qp=1 dt=83113/140000000000000/0 df=288 of=11 ql=0/0 qs=N... kt=0/O ktl=944 b=10 ci=60709 nci=0 co=748 ca=871 + 1 c=14407 g=14408 pq=1 qp=0 dt=100679/140000000000000/0 df=378 of=7 ql=0/119 qs=NRW. kt=0/W ktl=9b6 b=10 ci=109740 nci=0 co=589 ca=485 + 2 c=14407 g=14408 pq=1 qp=0 dt=105486/0/0 df=90 of=9 ql=0/89 qs=NRW. kt=0/W ktl=c0c b=10 ci=83113 nci=0 co=533 ca=490 + 3 c=14407 g=14408 pq=1 qp=0 dt=107138/0/0 df=142 of=8 ql=0/188 qs=NRW. kt=0/W ktl=b96 b=10 ci=121114 nci=0 co=426 ca=290 + 4 c=14405 g=14406 pq=1 qp=1 dt=50238/0/0 df=706 of=7 ql=0/0 qs=.... kt=0/W ktl=812 b=10 ci=34929 nci=0 co=643 ca=114 + 5!c=14168 g=14169 pq=1 qp=0 dt=45465/140000000000000/0 df=161 of=11 ql=0/0 qs=N... kt=0/O ktl=b4d b=10 ci=47712 nci=0 co=677 ca=722 + 6 c=14404 g=14405 pq=1 qp=0 dt=59454/0/0 df=94 of=6 ql=0/0 qs=.... kt=0/W ktl=e57 b=10 ci=55597 nci=0 co=701 ca=811 + 7 c=14407 g=14408 pq=1 qp=1 dt=68850/0/0 df=31 of=8 ql=0/0 qs=.... kt=0/W ktl=14bd b=10 ci=77475 nci=0 co=508 ca=1042 + +This is similar to the output discussed above, but contains the following +additional fields: + o "kt" is the per-CPU kernel-thread state. The digit preceding the first slash is zero if there is no work pending and 1 otherwise. The character between the first pair of slashes is @@ -184,35 +234,51 @@ o "ktl" is the low-order 16 bits (in hexadecimal) of the count of This field is displayed only for CONFIG_RCU_BOOST kernels. -o "b" is the batch limit for this CPU. If more than this number - of RCU callbacks is ready to invoke, then the remainder will - be deferred. -o "ci" is the number of RCU callbacks that have been invoked for - this CPU. Note that ci+ql is the number of callbacks that have - been registered in absence of CPU-hotplug activity. +The output of "cat rcu/rcu_preempt/rcuexp" looks as follows: -o "co" is the number of RCU callbacks that have been orphaned due to - this CPU going offline. These orphaned callbacks have been moved - to an arbitrarily chosen online CPU. +s=21872 d=21872 w=0 tf=0 wd1=0 wd2=0 n=0 sc=21872 dt=21872 dl=0 dx=21872 + +These fields are as follows: + +o "s" is the starting sequence number. -o "ca" is the number of RCU callbacks that have been adopted due to - other CPUs going offline. Note that ci+co-ca+ql is the number of - RCU callbacks registered on this CPU. +o "d" is the ending sequence number. When the starting and ending + numbers differ, there is an expedited grace period in progress. -There is also an rcu/rcudata.csv file with the same information in -comma-separated-variable spreadsheet format. +o "w" is the number of times that the sequence numbers have been + in danger of wrapping. +o "tf" is the number of times that contention has resulted in a + failure to begin an expedited grace period. -The output of "cat rcu/rcugp" looks as follows: +o "wd1" and "wd2" are the number of times that an attempt to + start an expedited grace period found that someone else had + completed an expedited grace period that satisfies the + attempted request. "Our work is done." -rcu_sched: completed=33062 gpnum=33063 -rcu_bh: completed=464 gpnum=464 +o "n" is number of times that contention was so great that + the request was demoted from an expedited grace period to + a normal grace period. + +o "sc" is the number of times that the attempt to start a + new expedited grace period succeeded. + +o "dt" is the number of times that we attempted to update + the "d" counter. + +o "dl" is the number of times that we failed to update the "d" + counter. + +o "dx" is the number of times that we succeeded in updating + the "d" counter. -Again, this output is for both "rcu_sched" and "rcu_bh". Note that -kernels built with CONFIG_TREE_PREEMPT_RCU will have an additional -"rcu_preempt" line. The fields are taken from the rcu_state structure, -and are as follows: + +The output of "cat rcu/rcu_preempt/rcugp" looks as follows: + +completed=31249 gpnum=31250 age=1 max=18 + +These fields are taken from the rcu_state structure, and are as follows: o "completed" is the number of grace periods that have completed. It is comparable to the "c" field from rcu/rcudata in that a @@ -220,44 +286,42 @@ o "completed" is the number of grace periods that have completed. that the corresponding RCU grace period has completed. o "gpnum" is the number of grace periods that have started. It is - comparable to the "g" field from rcu/rcudata in that a CPU - whose "g" field matches the value of "gpnum" is aware that the - corresponding RCU grace period has started. + similarly comparable to the "g" field from rcu/rcudata in that + a CPU whose "g" field matches the value of "gpnum" is aware that + the corresponding RCU grace period has started. + + If these two fields are equal, then there is no grace period + in progress, in other words, RCU is idle. On the other hand, + if the two fields differ (as they are above), then an RCU grace + period is in progress. - If these two fields are equal (as they are for "rcu_bh" above), - then there is no grace period in progress, in other words, RCU - is idle. On the other hand, if the two fields differ (as they - do for "rcu_sched" above), then an RCU grace period is in progress. +o "age" is the number of jiffies that the current grace period + has extended for, or zero if there is no grace period currently + in effect. +o "max" is the age in jiffies of the longest-duration grace period + thus far. -The output of "cat rcu/rcuhier" looks as follows, with very long lines: +The output of "cat rcu/rcu_preempt/rcuhier" looks as follows: -c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6 -1/1 ..>. 0:127 ^0 -3/3 ..>. 0:35 ^0 0/0 ..>. 36:71 ^1 0/0 ..>. 72:107 ^2 0/0 ..>. 108:127 ^3 -3/3f ..>. 0:5 ^0 2/3 ..>. 6:11 ^1 0/0 ..>. 12:17 ^2 0/0 ..>. 18:23 ^3 0/0 ..>. 24:29 ^4 0/0 ..>. 30:35 ^5 0/0 ..>. 36:41 ^0 0/0 ..>. 42:47 ^1 0/0 ..>. 48:53 ^2 0/0 ..>. 54:59 ^3 0/0 ..>. 60:65 ^4 0/0 ..>. 66:71 ^5 0/0 ..>. 72:77 ^0 0/0 ..>. 78:83 ^1 0/0 ..>. 84:89 ^2 0/0 ..>. 90:95 ^3 0/0 ..>. 96:101 ^4 0/0 ..>. 102:107 ^5 0/0 ..>. 108:113 ^0 0/0 ..>. 114:119 ^1 0/0 ..>. 120:125 ^2 0/0 ..>. 126:127 ^3 -rcu_bh: -c=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0 -0/1 ..>. 0:127 ^0 -0/3 ..>. 0:35 ^0 0/0 ..>. 36:71 ^1 0/0 ..>. 72:107 ^2 0/0 ..>. 108:127 ^3 -0/3f ..>. 0:5 ^0 0/3 ..>. 6:11 ^1 0/0 ..>. 12:17 ^2 0/0 ..>. 18:23 ^3 0/0 ..>. 24:29 ^4 0/0 ..>. 30:35 ^5 0/0 ..>. 36:41 ^0 0/0 ..>. 42:47 ^1 0/0 ..>. 48:53 ^2 0/0 ..>. 54:59 ^3 0/0 ..>. 60:65 ^4 0/0 ..>. 66:71 ^5 0/0 ..>. 72:77 ^0 0/0 ..>. 78:83 ^1 0/0 ..>. 84:89 ^2 0/0 ..>. 90:95 ^3 0/0 ..>. 96:101 ^4 0/0 ..>. 102:107 ^5 0/0 ..>. 108:113 ^0 0/0 ..>. 114:119 ^1 0/0 ..>. 120:125 ^2 0/0 ..>. 126:127 ^3 +c=14407 g=14408 s=0 jfq=2 j=c863 nfqs=12040/nfqsng=0(12040) fqlh=1051 oqlen=0/0 +3/3 ..>. 0:7 ^0 +e/e ..>. 0:3 ^0 d/d ..>. 4:7 ^1 -This is once again split into "rcu_sched" and "rcu_bh" portions, -and CONFIG_TREE_PREEMPT_RCU kernels will again have an additional -"rcu_preempt" section. The fields are as follows: +The fields are as follows: -o "c" is exactly the same as "completed" under rcu/rcugp. +o "c" is exactly the same as "completed" under rcu/rcu_preempt/rcugp. -o "g" is exactly the same as "gpnum" under rcu/rcugp. +o "g" is exactly the same as "gpnum" under rcu/rcu_preempt/rcugp. -o "s" is the "signaled" state that drives force_quiescent_state()'s +o "s" is the current state of the force_quiescent_state() state machine. o "jfq" is the number of jiffies remaining for this grace period before force_quiescent_state() is invoked to help push things - along. Note that CPUs in dyntick-idle mode throughout the grace - period will not report on their own, but rather must be check by - some other CPU via force_quiescent_state(). + along. Note that CPUs in idle mode throughout the grace period + will not report on their own, but rather must be check by some + other CPU via force_quiescent_state(). o "j" is the low-order four hex digits of the jiffies counter. Yes, Paul did run into a number of problems that turned out to @@ -268,7 +332,8 @@ o "nfqs" is the number of calls to force_quiescent_state() since o "nfqsng" is the number of useless calls to force_quiescent_state(), where there wasn't actually a grace period active. This can - happen due to races. The number in parentheses is the difference + no longer happen due to grace-period processing being pushed + into a kthread. The number in parentheses is the difference between "nfqs" and "nfqsng", or the number of times that force_quiescent_state() actually did some real work. @@ -276,28 +341,27 @@ o "fqlh" is the number of calls to force_quiescent_state() that exited immediately (without even being counted in nfqs above) due to contention on ->fqslock. -o Each element of the form "1/1 0:127 ^0" represents one struct - rcu_node. Each line represents one level of the hierarchy, from - root to leaves. It is best to think of the rcu_data structures - as forming yet another level after the leaves. Note that there - might be either one, two, or three levels of rcu_node structures, - depending on the relationship between CONFIG_RCU_FANOUT and - CONFIG_NR_CPUS. +o Each element of the form "3/3 ..>. 0:7 ^0" represents one rcu_node + structure. Each line represents one level of the hierarchy, + from root to leaves. It is best to think of the rcu_data + structures as forming yet another level after the leaves. + Note that there might be either one, two, three, or even four + levels of rcu_node structures, depending on the relationship + between CONFIG_RCU_FANOUT, CONFIG_RCU_FANOUT_LEAF (possibly + adjusted using the rcu_fanout_leaf kernel boot parameter), and + CONFIG_NR_CPUS (possibly adjusted using the nr_cpu_ids count of + possible CPUs for the booting hardware). o The numbers separated by the "/" are the qsmask followed by the qsmaskinit. The qsmask will have one bit - set for each entity in the next lower level that - has not yet checked in for the current grace period. + set for each entity in the next lower level that has + not yet checked in for the current grace period ("e" + indicating CPUs 5, 6, and 7 in the example above). The qsmaskinit will have one bit for each entity that is currently expected to check in during each grace period. The value of qsmaskinit is assigned to that of qsmask at the beginning of each grace period. - For example, for "rcu_sched", the qsmask of the first - entry of the lowest level is 0x14, meaning that we - are still waiting for CPUs 2 and 4 to check in for the - current grace period. - o The characters separated by the ">" indicate the state of the blocked-tasks lists. A "G" preceding the ">" indicates that at least one task blocked in an RCU @@ -312,48 +376,39 @@ o Each element of the form "1/1 0:127 ^0" represents one struct A "." character appears if the corresponding condition does not hold, so that "..>." indicates that no tasks are blocked. In contrast, "GE>T" indicates maximal - inconvenience from blocked tasks. + inconvenience from blocked tasks. CONFIG_TREE_RCU + builds of the kernel will always show "..>.". o The numbers separated by the ":" are the range of CPUs served by this struct rcu_node. This can be helpful in working out how the hierarchy is wired together. - For example, the first entry at the lowest level shows - "0:5", indicating that it covers CPUs 0 through 5. + For example, the example rcu_node structure shown above + has "0:7", indicating that it covers CPUs 0 through 7. o The number after the "^" indicates the bit in the - next higher level rcu_node structure that this - rcu_node structure corresponds to. - - For example, the first entry at the lowest level shows - "^0", indicating that it corresponds to bit zero in - the first entry at the middle level. - - -The output of "cat rcu/rcu_pending" looks as follows: - -rcu_sched: - 0 np=255892 qsp=53936 rpq=85 cbr=0 cng=14417 gpc=10033 gps=24320 nn=146741 - 1 np=261224 qsp=54638 rpq=33 cbr=0 cng=25723 gpc=16310 gps=2849 nn=155792 - 2 np=237496 qsp=49664 rpq=23 cbr=0 cng=2762 gpc=45478 gps=1762 nn=136629 - 3 np=236249 qsp=48766 rpq=98 cbr=0 cng=286 gpc=48049 gps=1218 nn=137723 - 4 np=221310 qsp=46850 rpq=7 cbr=0 cng=26 gpc=43161 gps=4634 nn=123110 - 5 np=237332 qsp=48449 rpq=9 cbr=0 cng=54 gpc=47920 gps=3252 nn=137456 - 6 np=219995 qsp=46718 rpq=12 cbr=0 cng=50 gpc=42098 gps=6093 nn=120834 - 7 np=249893 qsp=49390 rpq=42 cbr=0 cng=72 gpc=38400 gps=17102 nn=144888 -rcu_bh: - 0 np=146741 qsp=1419 rpq=6 cbr=0 cng=6 gpc=0 gps=0 nn=145314 - 1 np=155792 qsp=12597 rpq=3 cbr=0 cng=0 gpc=4 gps=8 nn=143180 - 2 np=136629 qsp=18680 rpq=1 cbr=0 cng=0 gpc=7 gps=6 nn=117936 - 3 np=137723 qsp=2843 rpq=0 cbr=0 cng=0 gpc=10 gps=7 nn=134863 - 4 np=123110 qsp=12433 rpq=0 cbr=0 cng=0 gpc=4 gps=2 nn=110671 - 5 np=137456 qsp=4210 rpq=1 cbr=0 cng=0 gpc=6 gps=5 nn=133235 - 6 np=120834 qsp=9902 rpq=2 cbr=0 cng=0 gpc=6 gps=3 nn=110921 - 7 np=144888 qsp=26336 rpq=0 cbr=0 cng=0 gpc=8 gps=2 nn=118542 - -As always, this is once again split into "rcu_sched" and "rcu_bh" -portions, with CONFIG_TREE_PREEMPT_RCU kernels having an additional -"rcu_preempt" section. The fields are as follows: + next higher level rcu_node structure that this rcu_node + structure corresponds to. For example, the "d/d ..>. 4:7 + ^1" has a "1" in this position, indicating that it + corresponds to the "1" bit in the "3" shown in the + "3/3 ..>. 0:7 ^0" entry on the next level up. + + +The output of "cat rcu/rcu_sched/rcu_pending" looks as follows: + + 0!np=26111 qsp=29 rpq=5386 cbr=1 cng=570 gpc=3674 gps=577 nn=15903 + 1!np=28913 qsp=35 rpq=6097 cbr=1 cng=448 gpc=3700 gps=554 nn=18113 + 2!np=32740 qsp=37 rpq=6202 cbr=0 cng=476 gpc=4627 gps=546 nn=20889 + 3 np=23679 qsp=22 rpq=5044 cbr=1 cng=415 gpc=3403 gps=347 nn=14469 + 4!np=30714 qsp=4 rpq=5574 cbr=0 cng=528 gpc=3931 gps=639 nn=20042 + 5 np=28910 qsp=2 rpq=5246 cbr=0 cng=428 gpc=4105 gps=709 nn=18422 + 6!np=38648 qsp=5 rpq=7076 cbr=0 cng=840 gpc=4072 gps=961 nn=25699 + 7 np=37275 qsp=2 rpq=6873 cbr=0 cng=868 gpc=3416 gps=971 nn=25147 + +The fields are as follows: + +o The leading number is the CPU number, with "!" indicating + an offline CPU. o "np" is the number of times that __rcu_pending() has been invoked for the corresponding flavor of RCU. @@ -377,38 +432,23 @@ o "gpc" is the number of times that an old grace period had o "gps" is the number of times that a new grace period had started, but this CPU was not yet aware of it. -o "nn" is the number of times that this CPU needed nothing. Alert - readers will note that the rcu "nn" number for a given CPU very - closely matches the rcu_bh "np" number for that same CPU. This - is due to short-circuit evaluation in rcu_pending(). - - -The output of "cat rcu/rcutorture" looks as follows: - -rcutorture test sequence: 0 (test in progress) -rcutorture update version number: 615 - -The first line shows the number of rcutorture tests that have completed -since boot. If a test is currently running, the "(test in progress)" -string will appear as shown above. The second line shows the number of -update cycles that the current test has started, or zero if there is -no test in progress. +o "nn" is the number of times that this CPU needed nothing. The output of "cat rcu/rcuboost" looks as follows: -0:5 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=2f95 bt=300f - balk: nt=0 egt=989 bt=0 nb=0 ny=0 nos=16 -6:7 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=2f95 bt=300f - balk: nt=0 egt=225 bt=0 nb=0 ny=0 nos=6 +0:3 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=c864 bt=c894 + balk: nt=0 egt=4695 bt=0 nb=0 ny=56 nos=0 +4:7 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=c864 bt=c894 + balk: nt=0 egt=6541 bt=0 nb=0 ny=126 nos=0 This information is output only for rcu_preempt. Each two-line entry corresponds to a leaf rcu_node strcuture. The fields are as follows: o "n:m" is the CPU-number range for the corresponding two-line entry. In the sample output above, the first entry covers - CPUs zero through five and the second entry covers CPUs 6 - and 7. + CPUs zero through three and the second entry covers CPUs four + through seven. o "tasks=TNEB" gives the state of the various segments of the rnp->blocked_tasks list: diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt index bf0f6de2aa00..0cc7820967f4 100644 --- a/Documentation/RCU/whatisRCU.txt +++ b/Documentation/RCU/whatisRCU.txt @@ -499,6 +499,8 @@ The foo_reclaim() function might appear as follows: { struct foo *fp = container_of(rp, struct foo, rcu); + foo_cleanup(fp->a); + kfree(fp); } @@ -521,6 +523,12 @@ o Use call_rcu() -after- removing a data element from an read-side critical sections that might be referencing that data item. +If the callback for call_rcu() is not doing anything more than calling +kfree() on the structure, you can use kfree_rcu() instead of call_rcu() +to avoid having to write your own callback: + + kfree_rcu(old_fp, rcu); + Again, see checklist.txt for additional rules governing the use of RCU. @@ -773,8 +781,8 @@ a single atomic update, converting to RCU will require special care. Also, the presence of synchronize_rcu() means that the RCU version of delete() can now block. If this is a problem, there is a callback-based -mechanism that never blocks, namely call_rcu(), that can be used in -place of synchronize_rcu(). +mechanism that never blocks, namely call_rcu() or kfree_rcu(), that can +be used in place of synchronize_rcu(). 7. FULL LIST OF RCU APIs @@ -789,9 +797,7 @@ RCU list traversal: list_for_each_entry_rcu hlist_for_each_entry_rcu hlist_nulls_for_each_entry_rcu - - list_for_each_continue_rcu (to be deprecated in favor of new - list_for_each_entry_continue_rcu) + list_for_each_entry_continue_rcu RCU pointer/list update: @@ -813,6 +819,7 @@ RCU: Critical sections Grace period Barrier rcu_read_unlock synchronize_rcu rcu_dereference synchronize_rcu_expedited call_rcu + kfree_rcu bh: Critical sections Grace period Barrier diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c index 6f706aca2049..f8ebcde43b17 100644 --- a/Documentation/accounting/getdelays.c +++ b/Documentation/accounting/getdelays.c @@ -51,7 +51,6 @@ int dbg; int print_delays; int print_io_accounting; int print_task_context_switch_counts; -__u64 stime, utime; #define PRINTF(fmt, arg...) { \ if (dbg) { \ diff --git a/Documentation/acpi/enumeration.txt b/Documentation/acpi/enumeration.txt new file mode 100644 index 000000000000..4f27785ca0c8 --- /dev/null +++ b/Documentation/acpi/enumeration.txt @@ -0,0 +1,227 @@ +ACPI based device enumeration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ACPI 5 introduced a set of new resources (UartTSerialBus, I2cSerialBus, +SpiSerialBus, GpioIo and GpioInt) which can be used in enumerating slave +devices behind serial bus controllers. + +In addition we are starting to see peripherals integrated in the +SoC/Chipset to appear only in ACPI namespace. These are typically devices +that are accessed through memory-mapped registers. + +In order to support this and re-use the existing drivers as much as +possible we decided to do following: + + o Devices that have no bus connector resource are represented as + platform devices. + + o Devices behind real busses where there is a connector resource + are represented as struct spi_device or struct i2c_device + (standard UARTs are not busses so there is no struct uart_device). + +As both ACPI and Device Tree represent a tree of devices (and their +resources) this implementation follows the Device Tree way as much as +possible. + +The ACPI implementation enumerates devices behind busses (platform, SPI and +I2C), creates the physical devices and binds them to their ACPI handle in +the ACPI namespace. + +This means that when ACPI_HANDLE(dev) returns non-NULL the device was +enumerated from ACPI namespace. This handle can be used to extract other +device-specific configuration. There is an example of this below. + +Platform bus support +~~~~~~~~~~~~~~~~~~~~ +Since we are using platform devices to represent devices that are not +connected to any physical bus we only need to implement a platform driver +for the device and add supported ACPI IDs. If this same IP-block is used on +some other non-ACPI platform, the driver might work out of the box or needs +some minor changes. + +Adding ACPI support for an existing driver should be pretty +straightforward. Here is the simplest example: + + #ifdef CONFIG_ACPI + static struct acpi_device_id mydrv_acpi_match[] = { + /* ACPI IDs here */ + { } + }; + MODULE_DEVICE_TABLE(acpi, mydrv_acpi_match); + #endif + + static struct platform_driver my_driver = { + ... + .driver = { + .acpi_match_table = ACPI_PTR(mydrv_acpi_match), + }, + }; + +If the driver needs to perform more complex initialization like getting and +configuring GPIOs it can get its ACPI handle and extract this information +from ACPI tables. + +Currently the kernel is not able to automatically determine from which ACPI +device it should make the corresponding platform device so we need to add +the ACPI device explicitly to acpi_platform_device_ids list defined in +drivers/acpi/scan.c. This limitation is only for the platform devices, SPI +and I2C devices are created automatically as described below. + +SPI serial bus support +~~~~~~~~~~~~~~~~~~~~~~ +Slave devices behind SPI bus have SpiSerialBus resource attached to them. +This is extracted automatically by the SPI core and the slave devices are +enumerated once spi_register_master() is called by the bus driver. + +Here is what the ACPI namespace for a SPI slave might look like: + + Device (EEP0) + { + Name (_ADR, 1) + Name (_CID, Package() { + "ATML0025", + "AT25", + }) + ... + Method (_CRS, 0, NotSerialized) + { + SPISerialBus(1, PolarityLow, FourWireMode, 8, + ControllerInitiated, 1000000, ClockPolarityLow, + ClockPhaseFirst, "\\_SB.PCI0.SPI1",) + } + ... + +The SPI device drivers only need to add ACPI IDs in a similar way than with +the platform device drivers. Below is an example where we add ACPI support +to at25 SPI eeprom driver (this is meant for the above ACPI snippet): + + #ifdef CONFIG_ACPI + static struct acpi_device_id at25_acpi_match[] = { + { "AT25", 0 }, + { }, + }; + MODULE_DEVICE_TABLE(acpi, at25_acpi_match); + #endif + + static struct spi_driver at25_driver = { + .driver = { + ... + .acpi_match_table = ACPI_PTR(at25_acpi_match), + }, + }; + +Note that this driver actually needs more information like page size of the +eeprom etc. but at the time writing this there is no standard way of +passing those. One idea is to return this in _DSM method like: + + Device (EEP0) + { + ... + Method (_DSM, 4, NotSerialized) + { + Store (Package (6) + { + "byte-len", 1024, + "addr-mode", 2, + "page-size, 32 + }, Local0) + + // Check UUIDs etc. + + Return (Local0) + } + +Then the at25 SPI driver can get this configation by calling _DSM on its +ACPI handle like: + + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_object_list input; + acpi_status status; + + /* Fill in the input buffer */ + + status = acpi_evaluate_object(ACPI_HANDLE(&spi->dev), "_DSM", + &input, &output); + if (ACPI_FAILURE(status)) + /* Handle the error */ + + /* Extract the data here */ + + kfree(output.pointer); + +I2C serial bus support +~~~~~~~~~~~~~~~~~~~~~~ +The slaves behind I2C bus controller only need to add the ACPI IDs like +with the platform and SPI drivers. However the I2C bus controller driver +needs to call acpi_i2c_register_devices() after it has added the adapter. + +An I2C bus (controller) driver does: + + ... + ret = i2c_add_numbered_adapter(adapter); + if (ret) + /* handle error */ + + of_i2c_register_devices(adapter); + /* Enumerate the slave devices behind this bus via ACPI */ + acpi_i2c_register_devices(adapter); + +Below is an example of how to add ACPI support to the existing mpu3050 +input driver: + + #ifdef CONFIG_ACPI + static struct acpi_device_id mpu3050_acpi_match[] = { + { "MPU3050", 0 }, + { }, + }; + MODULE_DEVICE_TABLE(acpi, mpu3050_acpi_match); + #endif + + static struct i2c_driver mpu3050_i2c_driver = { + .driver = { + .name = "mpu3050", + .owner = THIS_MODULE, + .pm = &mpu3050_pm, + .of_match_table = mpu3050_of_match, + .acpi_match_table ACPI_PTR(mpu3050_acpi_match), + }, + .probe = mpu3050_probe, + .remove = __devexit_p(mpu3050_remove), + .id_table = mpu3050_ids, + }; + +GPIO support +~~~~~~~~~~~~ +ACPI 5 introduced two new resources to describe GPIO connections: GpioIo +and GpioInt. These resources are used be used to pass GPIO numbers used by +the device to the driver. For example: + + Method (_CRS, 0, NotSerialized) + { + Name (SBUF, ResourceTemplate() + { + GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, + IoRestrictionOutputOnly, "\\_SB.PCI0.GPI0", + 0x00, ResourceConsumer,,) + { + // Pin List + 0x0055 + } + ... + + Return (SBUF) + } + } + +These GPIO numbers are controller relative and path "\\_SB.PCI0.GPI0" +specifies the path to the controller. In order to use these GPIOs in Linux +we need to translate them to the Linux GPIO numbers. + +The driver can do this by including <linux/acpi_gpio.h> and then calling +acpi_get_gpio(path, gpio). This will return the Linux GPIO number or +negative errno if there was no translation found. + +Other GpioIo parameters must be converted first by the driver to be +suitable to the gpiolib before passing them. + +In case of GpioInt resource an additional call to gpio_to_irq() must be +done before calling request_irq(). diff --git a/Documentation/arm/sunxi/README b/Documentation/arm/sunxi/README new file mode 100644 index 000000000000..87a1e8fb6242 --- /dev/null +++ b/Documentation/arm/sunxi/README @@ -0,0 +1,19 @@ +ARM Allwinner SoCs +================== + +This document lists all the ARM Allwinner SoCs that are currently +supported in mainline by the Linux kernel. This document will also +provide links to documentation and or datasheet for these SoCs. + +SunXi family +------------ + + Flavors: + Allwinner A10 (sun4i) + Datasheet : http://dl.linux-sunxi.org/A10/A10%20Datasheet%20-%20v1.21%20%282012-04-06%29.pdf + + Allwinner A13 (sun5i) + Datasheet : http://dl.linux-sunxi.org/A13/A13%20Datasheet%20-%20v1.12%20%282012-03-29%29.pdf + + Core: Cortex A8 + Linux kernel mach directory: arch/arm/mach-sunxi
\ No newline at end of file diff --git a/Documentation/arm64/memory.txt b/Documentation/arm64/memory.txt index 4110cca96bd6..d758702fc03c 100644 --- a/Documentation/arm64/memory.txt +++ b/Documentation/arm64/memory.txt @@ -41,7 +41,7 @@ ffffffbbffff0000 ffffffbcffffffff ~2MB [guard] ffffffbffc000000 ffffffbfffffffff 64MB modules -ffffffc000000000 ffffffffffffffff 256GB memory +ffffffc000000000 ffffffffffffffff 256GB kernel logical memory map Translation table lookup with 4KB pages: diff --git a/Documentation/bus-devices/ti-gpmc.txt b/Documentation/bus-devices/ti-gpmc.txt new file mode 100644 index 000000000000..cc9ce57e0a26 --- /dev/null +++ b/Documentation/bus-devices/ti-gpmc.txt @@ -0,0 +1,122 @@ +GPMC (General Purpose Memory Controller): +========================================= + +GPMC is an unified memory controller dedicated to interfacing external +memory devices like + * Asynchronous SRAM like memories and application specific integrated + circuit devices. + * Asynchronous, synchronous, and page mode burst NOR flash devices + NAND flash + * Pseudo-SRAM devices + +GPMC is found on Texas Instruments SoC's (OMAP based) +IP details: http://www.ti.com/lit/pdf/spruh73 section 7.1 + + +GPMC generic timing calculation: +================================ + +GPMC has certain timings that has to be programmed for proper +functioning of the peripheral, while peripheral has another set of +timings. To have peripheral work with gpmc, peripheral timings has to +be translated to the form gpmc can understand. The way it has to be +translated depends on the connected peripheral. Also there is a +dependency for certain gpmc timings on gpmc clock frequency. Hence a +generic timing routine was developed to achieve above requirements. + +Generic routine provides a generic method to calculate gpmc timings +from gpmc peripheral timings. struct gpmc_device_timings fields has to +be updated with timings from the datasheet of the peripheral that is +connected to gpmc. A few of the peripheral timings can be fed either +in time or in cycles, provision to handle this scenario has been +provided (refer struct gpmc_device_timings definition). It may so +happen that timing as specified by peripheral datasheet is not present +in timing structure, in this scenario, try to correlate peripheral +timing to the one available. If that doesn't work, try to add a new +field as required by peripheral, educate generic timing routine to +handle it, make sure that it does not break any of the existing. +Then there may be cases where peripheral datasheet doesn't mention +certain fields of struct gpmc_device_timings, zero those entries. + +Generic timing routine has been verified to work properly on +multiple onenand's and tusb6010 peripherals. + +A word of caution: generic timing routine has been developed based +on understanding of gpmc timings, peripheral timings, available +custom timing routines, a kind of reverse engineering without +most of the datasheets & hardware (to be exact none of those supported +in mainline having custom timing routine) and by simulation. + +gpmc timing dependency on peripheral timings: +[<gpmc_timing>: <peripheral timing1>, <peripheral timing2> ...] + +1. common +cs_on: t_ceasu +adv_on: t_avdasu, t_ceavd + +2. sync common +sync_clk: clk +page_burst_access: t_bacc +clk_activation: t_ces, t_avds + +3. read async muxed +adv_rd_off: t_avdp_r +oe_on: t_oeasu, t_aavdh +access: t_iaa, t_oe, t_ce, t_aa +rd_cycle: t_rd_cycle, t_cez_r, t_oez + +4. read async non-muxed +adv_rd_off: t_avdp_r +oe_on: t_oeasu +access: t_iaa, t_oe, t_ce, t_aa +rd_cycle: t_rd_cycle, t_cez_r, t_oez + +5. read sync muxed +adv_rd_off: t_avdp_r, t_avdh +oe_on: t_oeasu, t_ach, cyc_aavdh_oe +access: t_iaa, cyc_iaa, cyc_oe +rd_cycle: t_cez_r, t_oez, t_ce_rdyz + +6. read sync non-muxed +adv_rd_off: t_avdp_r +oe_on: t_oeasu +access: t_iaa, cyc_iaa, cyc_oe +rd_cycle: t_cez_r, t_oez, t_ce_rdyz + +7. write async muxed +adv_wr_off: t_avdp_w +we_on, wr_data_mux_bus: t_weasu, t_aavdh, cyc_aavhd_we +we_off: t_wpl +cs_wr_off: t_wph +wr_cycle: t_cez_w, t_wr_cycle + +8. write async non-muxed +adv_wr_off: t_avdp_w +we_on, wr_data_mux_bus: t_weasu +we_off: t_wpl +cs_wr_off: t_wph +wr_cycle: t_cez_w, t_wr_cycle + +9. write sync muxed +adv_wr_off: t_avdp_w, t_avdh +we_on, wr_data_mux_bus: t_weasu, t_rdyo, t_aavdh, cyc_aavhd_we +we_off: t_wpl, cyc_wpl +cs_wr_off: t_wph +wr_cycle: t_cez_w, t_ce_rdyz + +10. write sync non-muxed +adv_wr_off: t_avdp_w +we_on, wr_data_mux_bus: t_weasu, t_rdyo +we_off: t_wpl, cyc_wpl +cs_wr_off: t_wph +wr_cycle: t_cez_w, t_ce_rdyz + + +Note: Many of gpmc timings are dependent on other gpmc timings (a few +gpmc timings purely dependent on other gpmc timings, a reason that +some of the gpmc timings are missing above), and it will result in +indirect dependency of peripheral timings to gpmc timings other than +mentioned above, refer timing routine for more details. To know what +these peripheral timings correspond to, please see explanations in +struct gpmc_device_timings definition. And for gpmc timings refer +IP details (link above). diff --git a/Documentation/cgroups/00-INDEX b/Documentation/cgroups/00-INDEX index 3f58fa3d6d00..f78b90a35ad0 100644 --- a/Documentation/cgroups/00-INDEX +++ b/Documentation/cgroups/00-INDEX @@ -1,7 +1,11 @@ 00-INDEX - this file +blkio-controller.txt + - Description for Block IO Controller, implementation and usage details. cgroups.txt - Control Groups definition, implementation details, examples and API. +cgroup_event_listener.c + - A user program for cgroup listener. cpuacct.txt - CPU Accounting Controller; account CPU usage for groups of tasks. cpusets.txt @@ -10,9 +14,13 @@ devices.txt - Device Whitelist Controller; description, interface and security. freezer-subsystem.txt - checkpointing; rationale to not use signals, interface. +hugetlb.txt + - HugeTLB Controller implementation and usage details. memcg_test.txt - Memory Resource Controller; implementation details. memory.txt - Memory Resource Controller; design, accounting, interface, testing. +net_prio.txt + - Network priority cgroups details and usages. resource_counter.txt - Resource Counter API. diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index 9e04196c4d78..bcf1a00b06a1 100644 --- a/Documentation/cgroups/cgroups.txt +++ b/Documentation/cgroups/cgroups.txt @@ -299,11 +299,9 @@ a cgroup hierarchy's release_agent path is empty. 1.5 What does clone_children do ? --------------------------------- -If the clone_children flag is enabled (1) in a cgroup, then all -cgroups created beneath will call the post_clone callbacks for each -subsystem of the newly created cgroup. Usually when this callback is -implemented for a subsystem, it copies the values of the parent -subsystem, this is the case for the cpuset. +This flag only affects the cpuset controller. If the clone_children +flag is enabled (1) in a cgroup, a new cpuset cgroup will copy its +configuration from the parent during initialization. 1.6 How do I use cgroups ? -------------------------- @@ -553,16 +551,16 @@ call to cgroup_unload_subsys(). It should also set its_subsys.module = THIS_MODULE in its .c file. Each subsystem may export the following methods. The only mandatory -methods are create/destroy. Any others that are null are presumed to +methods are css_alloc/free. Any others that are null are presumed to be successful no-ops. -struct cgroup_subsys_state *create(struct cgroup *cgrp) +struct cgroup_subsys_state *css_alloc(struct cgroup *cgrp) (cgroup_mutex held by caller) -Called to create a subsystem state object for a cgroup. The +Called to allocate a subsystem state object for a cgroup. The subsystem should allocate its subsystem state object for the passed cgroup, returning a pointer to the new object on success or a -negative error code. On success, the subsystem pointer should point to +ERR_PTR() value. On success, the subsystem pointer should point to a structure of type cgroup_subsys_state (typically embedded in a larger subsystem-specific object), which will be initialized by the cgroup system. Note that this will be called at initialization to @@ -571,24 +569,33 @@ identified by the passed cgroup object having a NULL parent (since it's the root of the hierarchy) and may be an appropriate place for initialization code. -void destroy(struct cgroup *cgrp) +int css_online(struct cgroup *cgrp) (cgroup_mutex held by caller) -The cgroup system is about to destroy the passed cgroup; the subsystem -should do any necessary cleanup and free its subsystem state -object. By the time this method is called, the cgroup has already been -unlinked from the file system and from the child list of its parent; -cgroup->parent is still valid. (Note - can also be called for a -newly-created cgroup if an error occurs after this subsystem's -create() method has been called for the new cgroup). +Called after @cgrp successfully completed all allocations and made +visible to cgroup_for_each_child/descendant_*() iterators. The +subsystem may choose to fail creation by returning -errno. This +callback can be used to implement reliable state sharing and +propagation along the hierarchy. See the comment on +cgroup_for_each_descendant_pre() for details. -int pre_destroy(struct cgroup *cgrp); +void css_offline(struct cgroup *cgrp); -Called before checking the reference count on each subsystem. This may -be useful for subsystems which have some extra references even if -there are not tasks in the cgroup. If pre_destroy() returns error code, -rmdir() will fail with it. From this behavior, pre_destroy() can be -called multiple times against a cgroup. +This is the counterpart of css_online() and called iff css_online() +has succeeded on @cgrp. This signifies the beginning of the end of +@cgrp. @cgrp is being removed and the subsystem should start dropping +all references it's holding on @cgrp. When all references are dropped, +cgroup removal will proceed to the next step - css_free(). After this +callback, @cgrp should be considered dead to the subsystem. + +void css_free(struct cgroup *cgrp) +(cgroup_mutex held by caller) + +The cgroup system is about to free @cgrp; the subsystem should free +its subsystem state object. By the time this method is called, @cgrp +is completely unused; @cgrp->parent is still valid. (Note - can also +be called for a newly-created cgroup if an error occurs after this +subsystem's create() method has been called for the new cgroup). int can_attach(struct cgroup *cgrp, struct cgroup_taskset *tset) (cgroup_mutex held by caller) @@ -635,14 +642,6 @@ void exit(struct task_struct *task) Called during task exit. -void post_clone(struct cgroup *cgrp) -(cgroup_mutex held by caller) - -Called during cgroup_create() to do any parameter -initialization which might be required before a task could attach. For -example, in cpusets, no task may attach before 'cpus' and 'mems' are set -up. - void bind(struct cgroup *root) (cgroup_mutex held by caller) diff --git a/Documentation/cgroups/freezer-subsystem.txt b/Documentation/cgroups/freezer-subsystem.txt index 7e62de1e59ff..c96a72cbb30a 100644 --- a/Documentation/cgroups/freezer-subsystem.txt +++ b/Documentation/cgroups/freezer-subsystem.txt @@ -49,13 +49,49 @@ prevent the freeze/unfreeze cycle from becoming visible to the tasks being frozen. This allows the bash example above and gdb to run as expected. -The freezer subsystem in the container filesystem defines a file named -freezer.state. Writing "FROZEN" to the state file will freeze all tasks in the -cgroup. Subsequently writing "THAWED" will unfreeze the tasks in the cgroup. -Reading will return the current state. +The cgroup freezer is hierarchical. Freezing a cgroup freezes all +tasks beloning to the cgroup and all its descendant cgroups. Each +cgroup has its own state (self-state) and the state inherited from the +parent (parent-state). Iff both states are THAWED, the cgroup is +THAWED. -Note freezer.state doesn't exist in root cgroup, which means root cgroup -is non-freezable. +The following cgroupfs files are created by cgroup freezer. + +* freezer.state: Read-write. + + When read, returns the effective state of the cgroup - "THAWED", + "FREEZING" or "FROZEN". This is the combined self and parent-states. + If any is freezing, the cgroup is freezing (FREEZING or FROZEN). + + FREEZING cgroup transitions into FROZEN state when all tasks + belonging to the cgroup and its descendants become frozen. Note that + a cgroup reverts to FREEZING from FROZEN after a new task is added + to the cgroup or one of its descendant cgroups until the new task is + frozen. + + When written, sets the self-state of the cgroup. Two values are + allowed - "FROZEN" and "THAWED". If FROZEN is written, the cgroup, + if not already freezing, enters FREEZING state along with all its + descendant cgroups. + + If THAWED is written, the self-state of the cgroup is changed to + THAWED. Note that the effective state may not change to THAWED if + the parent-state is still freezing. If a cgroup's effective state + becomes THAWED, all its descendants which are freezing because of + the cgroup also leave the freezing state. + +* freezer.self_freezing: Read only. + + Shows the self-state. 0 if the self-state is THAWED; otherwise, 1. + This value is 1 iff the last write to freezer.state was "FROZEN". + +* freezer.parent_freezing: Read only. + + Shows the parent-state. 0 if none of the cgroup's ancestors is + frozen; otherwise, 1. + +The root cgroup is non-freezable and the above interface files don't +exist. * Examples of usage : @@ -85,18 +121,3 @@ to unfreeze all tasks in the container : This is the basic mechanism which should do the right thing for user space task in a simple scenario. - -It's important to note that freezing can be incomplete. In that case we return -EBUSY. This means that some tasks in the cgroup are busy doing something that -prevents us from completely freezing the cgroup at this time. After EBUSY, -the cgroup will remain partially frozen -- reflected by freezer.state reporting -"FREEZING" when read. The state will remain "FREEZING" until one of these -things happens: - - 1) Userspace cancels the freezing operation by writing "THAWED" to - the freezer.state file - 2) Userspace retries the freezing operation by writing "FROZEN" to - the freezer.state file (writing "FREEZING" is not legal - and returns EINVAL) - 3) The tasks that blocked the cgroup from entering the "FROZEN" - state disappear from the cgroup's set of tasks. diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index c07f7b4fb88d..a25cb3fafeba 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -144,9 +144,9 @@ Figure 1 shows the important aspects of the controller 3. Each page has a pointer to the page_cgroup, which in turn knows the cgroup it belongs to -The accounting is done as follows: mem_cgroup_charge() is invoked to set up -the necessary data structures and check if the cgroup that is being charged -is over its limit. If it is, then reclaim is invoked on the cgroup. +The accounting is done as follows: mem_cgroup_charge_common() is invoked to +set up the necessary data structures and check if the cgroup that is being +charged is over its limit. If it is, then reclaim is invoked on the cgroup. More details can be found in the reclaim section of this document. If everything goes well, a page meta-data-structure called page_cgroup is updated. page_cgroup has its own LRU on cgroup. @@ -466,6 +466,10 @@ Note: 5.3 swappiness Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only. +Please note that unlike the global swappiness, memcg knob set to 0 +really prevents from any swapping even if there is a swap storage +available. This might lead to memcg OOM killer if there are no file +pages to reclaim. Following cgroups' swappiness can't be changed. - root cgroup (uses /proc/sys/vm/swappiness). diff --git a/Documentation/cgroups/net_prio.txt b/Documentation/cgroups/net_prio.txt index 01b322635591..a82cbd28ea8a 100644 --- a/Documentation/cgroups/net_prio.txt +++ b/Documentation/cgroups/net_prio.txt @@ -51,3 +51,5 @@ One usage for the net_prio cgroup is with mqprio qdisc allowing application traffic to be steered to hardware/driver based traffic classes. These mappings can then be managed by administrators or other networking protocols such as DCBX. + +A new net_prio cgroup inherits the parent's configuration. diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt index 66ef8f35613d..9f401350f502 100644 --- a/Documentation/cpu-hotplug.txt +++ b/Documentation/cpu-hotplug.txt @@ -207,6 +207,30 @@ by making it not-removable. In such cases you will also notice that the online file is missing under cpu0. +Q: Is CPU0 removable on X86? +A: Yes. If kernel is compiled with CONFIG_BOOTPARAM_HOTPLUG_CPU0=y, CPU0 is +removable by default. Otherwise, CPU0 is also removable by kernel option +cpu0_hotplug. + +But some features depend on CPU0. Two known dependencies are: + +1. Resume from hibernate/suspend depends on CPU0. Hibernate/suspend will fail if +CPU0 is offline and you need to online CPU0 before hibernate/suspend can +continue. +2. PIC interrupts also depend on CPU0. CPU0 can't be removed if a PIC interrupt +is detected. + +It's said poweroff/reboot may depend on CPU0 on some machines although I haven't +seen any poweroff/reboot failure so far after CPU0 is offline on a few tested +machines. + +Please let me know if you know or see any other dependencies of CPU0. + +If the dependencies are under your control, you can turn on CPU0 hotplug feature +either by CONFIG_BOOTPARAM_HOTPLUG_CPU0 or by kernel parameter cpu0_hotplug. + +--Fenghua Yu <fenghua.yu@intel.com> + Q: How do i find out if a particular CPU is not removable? A: Depending on the implementation, some architectures may show this by the absence of the "online" file. This is done if it can be determined ahead of diff --git a/Documentation/devices.txt b/Documentation/devices.txt index b6251cca9263..08f01e79c41a 100644 --- a/Documentation/devices.txt +++ b/Documentation/devices.txt @@ -2561,9 +2561,6 @@ Your cooperation is appreciated. 192 = /dev/usb/yurex1 First USB Yurex device ... 209 = /dev/usb/yurex16 16th USB Yurex device - 240 = /dev/usb/dabusb0 First daubusb device - ... - 243 = /dev/usb/dabusb3 Fourth dabusb device 180 block USB block devices 0 = /dev/uba First USB block device diff --git a/Documentation/devicetree/bindings/arm/arm-boards b/Documentation/devicetree/bindings/arm/arm-boards index fc81a7d6b0f1..db5858e32d3f 100644 --- a/Documentation/devicetree/bindings/arm/arm-boards +++ b/Documentation/devicetree/bindings/arm/arm-boards @@ -9,6 +9,10 @@ Required properties (in root node): FPGA type interrupt controllers, see the versatile-fpga-irq binding doc. +In the root node the Integrator/CP must have a /cpcon node pointing +to the CP control registers, and the Integrator/AP must have a +/syscon node pointing to the Integrator/AP system controller. + ARM Versatile Application and Platform Baseboards ------------------------------------------------- diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt index d187e9f7cf1c..1196290082d1 100644 --- a/Documentation/devicetree/bindings/arm/atmel-at91.txt +++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt @@ -7,6 +7,12 @@ PIT Timer required properties: - interrupts: Should contain interrupt for the PIT which is the IRQ line shared across all System Controller members. +System Timer (ST) required properties: +- compatible: Should be "atmel,at91rm9200-st" +- reg: Should contain registers location and length +- interrupts: Should contain interrupt for the ST which is the IRQ line + shared across all System Controller members. + TC/TCLIB Timer required properties: - compatible: Should be "atmel,<chip>-tcb". <chip> can be "at91rm9200" or "at91sam9x5" diff --git a/Documentation/devicetree/bindings/arm/bcm/bcm11351.txt b/Documentation/devicetree/bindings/arm/bcm/bcm11351.txt new file mode 100644 index 000000000000..fb7b5cd2652f --- /dev/null +++ b/Documentation/devicetree/bindings/arm/bcm/bcm11351.txt @@ -0,0 +1,9 @@ +Broadcom BCM11351 device tree bindings +------------------------------------------- + +Boards with the bcm281xx SoC family (which includes bcm11130, bcm11140, +bcm11351, bcm28145, bcm28155 SoCs) shall have the following properties: + +Required root node property: + +compatible = "bcm,bcm11351"; diff --git a/Documentation/devicetree/bindings/arm/calxeda.txt b/Documentation/devicetree/bindings/arm/calxeda.txt index 4755caaccba6..25fcf96795ca 100644 --- a/Documentation/devicetree/bindings/arm/calxeda.txt +++ b/Documentation/devicetree/bindings/arm/calxeda.txt @@ -1,8 +1,15 @@ -Calxeda Highbank Platforms Device Tree Bindings +Calxeda Platforms Device Tree Bindings ----------------------------------------------- -Boards with Calxeda Cortex-A9 based Highbank SOC shall have the following -properties. +Boards with Calxeda Cortex-A9 based ECX-1000 (Highbank) SOC shall have the +following properties. Required root node properties: - compatible = "calxeda,highbank"; + + +Boards with Calxeda Cortex-A15 based ECX-2000 SOC shall have the following +properties. + +Required root node properties: + - compatible = "calxeda,ecx-2000"; diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt new file mode 100644 index 000000000000..f32494dbfe19 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/cpus.txt @@ -0,0 +1,77 @@ +* ARM CPUs binding description + +The device tree allows to describe the layout of CPUs in a system through +the "cpus" node, which in turn contains a number of subnodes (ie "cpu") +defining properties for every cpu. + +Bindings for CPU nodes follow the ePAPR standard, available from: + +http://devicetree.org + +For the ARM architecture every CPU node must contain the following properties: + +- device_type: must be "cpu" +- reg: property matching the CPU MPIDR[23:0] register bits + reg[31:24] bits must be set to 0 +- compatible: should be one of: + "arm,arm1020" + "arm,arm1020e" + "arm,arm1022" + "arm,arm1026" + "arm,arm720" + "arm,arm740" + "arm,arm7tdmi" + "arm,arm920" + "arm,arm922" + "arm,arm925" + "arm,arm926" + "arm,arm940" + "arm,arm946" + "arm,arm9tdmi" + "arm,cortex-a5" + "arm,cortex-a7" + "arm,cortex-a8" + "arm,cortex-a9" + "arm,cortex-a15" + "arm,arm1136" + "arm,arm1156" + "arm,arm1176" + "arm,arm11mpcore" + "faraday,fa526" + "intel,sa110" + "intel,sa1100" + "marvell,feroceon" + "marvell,mohawk" + "marvell,xsc3" + "marvell,xscale" + +Example: + + cpus { + #size-cells = <0>; + #address-cells = <1>; + + CPU0: cpu@0 { + device_type = "cpu"; + compatible = "arm,cortex-a15"; + reg = <0x0>; + }; + + CPU1: cpu@1 { + device_type = "cpu"; + compatible = "arm,cortex-a15"; + reg = <0x1>; + }; + + CPU2: cpu@100 { + device_type = "cpu"; + compatible = "arm,cortex-a7"; + reg = <0x100>; + }; + + CPU3: cpu@101 { + device_type = "cpu"; + compatible = "arm,cortex-a7"; + reg = <0x101>; + }; + }; diff --git a/Documentation/devicetree/bindings/arm/davinci.txt b/Documentation/devicetree/bindings/arm/davinci.txt new file mode 100644 index 000000000000..cfaeda4274e6 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/davinci.txt @@ -0,0 +1,17 @@ +Texas Instruments DaVinci Platforms Device Tree Bindings +-------------------------------------------------------- + +DA850/OMAP-L138/AM18x Evaluation Module (EVM) board +Required root node properties: + - compatible = "ti,da850-evm", "ti,da850"; + +EnBW AM1808 based CMC board +Required root node properties: + - compatible = "enbw,cmc", "ti,da850; + +Generic DaVinci Boards +---------------------- + +DA850/OMAP-L138/AM18x generic board +Required root node properties: + - compatible = "ti,da850"; diff --git a/Documentation/devicetree/bindings/arm/davinci/nand.txt b/Documentation/devicetree/bindings/arm/davinci/nand.txt index e37241f1fdd8..49fc7ada929a 100644 --- a/Documentation/devicetree/bindings/arm/davinci/nand.txt +++ b/Documentation/devicetree/bindings/arm/davinci/nand.txt @@ -23,29 +23,16 @@ Recommended properties : - ti,davinci-nand-buswidth: buswidth 8 or 16 - ti,davinci-nand-use-bbt: use flash based bad block table support. -Example (enbw_cmc board): -aemif@60000000 { - compatible = "ti,davinci-aemif"; - #address-cells = <2>; - #size-cells = <1>; - reg = <0x68000000 0x80000>; - ranges = <2 0 0x60000000 0x02000000 - 3 0 0x62000000 0x02000000 - 4 0 0x64000000 0x02000000 - 5 0 0x66000000 0x02000000 - 6 0 0x68000000 0x02000000>; - nand@3,0 { - compatible = "ti,davinci-nand"; - reg = <3 0x0 0x807ff - 6 0x0 0x8000>; - #address-cells = <1>; - #size-cells = <1>; - ti,davinci-chipselect = <1>; - ti,davinci-mask-ale = <0>; - ti,davinci-mask-cle = <0>; - ti,davinci-mask-chipsel = <0>; - ti,davinci-ecc-mode = "hw"; - ti,davinci-ecc-bits = <4>; - ti,davinci-nand-use-bbt; - }; +Example(da850 EVM ): +nand_cs3@62000000 { + compatible = "ti,davinci-nand"; + reg = <0x62000000 0x807ff + 0x68000000 0x8000>; + ti,davinci-chipselect = <1>; + ti,davinci-mask-ale = <0>; + ti,davinci-mask-cle = <0>; + ti,davinci-mask-chipsel = <0>; + ti,davinci-ecc-mode = "hw"; + ti,davinci-ecc-bits = <4>; + ti,davinci-nand-use-bbt; }; diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt index 6528e215c5fe..5216b419016a 100644 --- a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt +++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt @@ -4,14 +4,13 @@ Exynos processors include support for multiple power domains which are used to gate power to one or more peripherals on the processor. Required Properties: -- compatiable: should be one of the following. +- compatible: should be one of the following. * samsung,exynos4210-pd - for exynos4210 type power domain. - reg: physical base address of the controller and length of memory mapped region. -Optional Properties: -- samsung,exynos4210-pd-off: Specifies that the power domain is in turned-off - state during boot and remains to be turned-off until explicitly turned-on. +Node of a device using power domains must have a samsung,power-domain property +defined with a phandle to respective power domain. Example: @@ -19,3 +18,11 @@ Example: compatible = "samsung,exynos4210-pd"; reg = <0x10023C00 0x10>; }; + +Example of the node using power domain: + + node { + /* ... */ + samsung,power-domain = <&lcd0>; + /* ... */ + }; diff --git a/Documentation/devicetree/bindings/arm/fsl.txt b/Documentation/devicetree/bindings/arm/fsl.txt index ac9e7516756e..f79818711e83 100644 --- a/Documentation/devicetree/bindings/arm/fsl.txt +++ b/Documentation/devicetree/bindings/arm/fsl.txt @@ -41,6 +41,10 @@ i.MX6 Quad SABRE Smart Device Board Required root node properties: - compatible = "fsl,imx6q-sabresd", "fsl,imx6q"; +i.MX6 Quad SABRE Automotive Board +Required root node properties: + - compatible = "fsl,imx6q-sabreauto", "fsl,imx6q"; + Generic i.MX boards ------------------- diff --git a/Documentation/devicetree/bindings/arm/l2cc.txt b/Documentation/devicetree/bindings/arm/l2cc.txt index 7ca52161e7ab..7c3ee3aeb7b7 100644 --- a/Documentation/devicetree/bindings/arm/l2cc.txt +++ b/Documentation/devicetree/bindings/arm/l2cc.txt @@ -37,7 +37,7 @@ L2: cache-controller { reg = <0xfff12000 0x1000>; arm,data-latency = <1 1 1>; arm,tag-latency = <2 2 2>; - arm,filter-latency = <0x80000000 0x8000000>; + arm,filter-ranges = <0x80000000 0x8000000>; cache-unified; cache-level = <2>; interrupts = <45>; diff --git a/Documentation/devicetree/bindings/arm/omap/counter.txt b/Documentation/devicetree/bindings/arm/omap/counter.txt new file mode 100644 index 000000000000..5bd8aa091315 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/omap/counter.txt @@ -0,0 +1,15 @@ +OMAP Counter-32K bindings + +Required properties: +- compatible: Must be "ti,omap-counter32k" for OMAP controllers +- reg: Contains timer register address range (base address and length) +- ti,hwmods: Name of the hwmod associated to the counter, which is typically + "counter_32k" + +Example: + +counter32k: counter@4a304000 { + compatible = "ti,omap-counter32k"; + reg = <0x4a304000 0x20>; + ti,hwmods = "counter_32k"; +}; diff --git a/Documentation/devicetree/bindings/arm/omap/timer.txt b/Documentation/devicetree/bindings/arm/omap/timer.txt new file mode 100644 index 000000000000..8732d4d41f8b --- /dev/null +++ b/Documentation/devicetree/bindings/arm/omap/timer.txt @@ -0,0 +1,31 @@ +OMAP Timer bindings + +Required properties: +- compatible: Must be "ti,omap2-timer" for OMAP2+ controllers. +- reg: Contains timer register address range (base address and + length). +- interrupts: Contains the interrupt information for the timer. The + format is being dependent on which interrupt controller + the OMAP device uses. +- ti,hwmods: Name of the hwmod associated to the timer, "timer<X>", + where <X> is the instance number of the timer from the + HW spec. + +Optional properties: +- ti,timer-alwon: Indicates the timer is in an alway-on power domain. +- ti,timer-dsp: Indicates the timer can interrupt the on-chip DSP in + addition to the ARM CPU. +- ti,timer-pwm: Indicates the timer can generate a PWM output. +- ti,timer-secure: Indicates the timer is reserved on a secure OMAP device + and therefore cannot be used by the kernel. + +Example: + +timer12: timer@48304000 { + compatible = "ti,omap2-timer"; + reg = <0x48304000 0x400>; + interrupts = <95>; + ti,hwmods = "timer12" + ti,timer-alwon; + ti,timer-secure; +}; diff --git a/Documentation/devicetree/bindings/arm/vexpress-sysreg.txt b/Documentation/devicetree/bindings/arm/vexpress-sysreg.txt new file mode 100644 index 000000000000..9cf3f25544c7 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/vexpress-sysreg.txt @@ -0,0 +1,50 @@ +ARM Versatile Express system registers +-------------------------------------- + +This is a system control registers block, providing multiple low level +platform functions like board detection and identification, software +interrupt generation, MMC and NOR Flash control etc. + +Required node properties: +- compatible value : = "arm,vexpress,sysreg"; +- reg : physical base address and the size of the registers window +- gpio-controller : specifies that the node is a GPIO controller +- #gpio-cells : size of the GPIO specifier, should be 2: + - first cell is the pseudo-GPIO line number: + 0 - MMC CARDIN + 1 - MMC WPROT + 2 - NOR FLASH WPn + - second cell can take standard GPIO flags (currently ignored). + +Example: + v2m_sysreg: sysreg@10000000 { + compatible = "arm,vexpress-sysreg"; + reg = <0x10000000 0x1000>; + gpio-controller; + #gpio-cells = <2>; + }; + +This block also can also act a bridge to the platform's configuration +bus via "system control" interface, addressing devices with site number, +position in the board stack, config controller, function and device +numbers - see motherboard's TRM for more details. + +The node describing a config device must refer to the sysreg node via +"arm,vexpress,config-bridge" phandle (can be also defined in the node's +parent) and relies on the board topology properties - see main vexpress +node documentation for more details. It must must also define the +following property: +- arm,vexpress-sysreg,func : must contain two cells: + - first cell defines function number (eg. 1 for clock generator, + 2 for voltage regulators etc.) + - device number (eg. osc 0, osc 1 etc.) + +Example: + mcc { + arm,vexpress,config-bridge = <&v2m_sysreg>; + + osc@0 { + compatible = "arm,vexpress-osc"; + arm,vexpress-sysreg,func = <1 0>; + }; + }; diff --git a/Documentation/devicetree/bindings/arm/vexpress.txt b/Documentation/devicetree/bindings/arm/vexpress.txt index ec8b50cbb2e8..ae49161e478a 100644 --- a/Documentation/devicetree/bindings/arm/vexpress.txt +++ b/Documentation/devicetree/bindings/arm/vexpress.txt @@ -11,6 +11,10 @@ the motherboard file using a /include/ directive. As the motherboard can be initialized in one of two different configurations ("memory maps"), care must be taken to include the correct one. + +Root node +--------- + Required properties in the root node: - compatible value: compatible = "arm,vexpress,<model>", "arm,vexpress"; @@ -45,6 +49,10 @@ Optional properties in the root node: - Coretile Express A9x4 (V2P-CA9) HBI-0225: arm,hbi = <0x225>; + +CPU nodes +--------- + Top-level standard "cpus" node is required. It must contain a node with device_type = "cpu" property for every available core, eg.: @@ -59,6 +67,52 @@ with device_type = "cpu" property for every available core, eg.: }; }; + +Configuration infrastructure +---------------------------- + +The platform has an elaborated configuration system, consisting of +microcontrollers residing on the mother- and daughterboards known +as Motherboard/Daughterboard Configuration Controller (MCC and DCC). +The controllers are responsible for the platform initialization +(reset generation, flash programming, FPGA bitfiles loading etc.) +but also control clock generators, voltage regulators, gather +environmental data like temperature, power consumption etc. Even +the video output switch (FPGA) is controlled that way. + +Nodes describing devices controlled by this infrastructure should +point at the bridge device node: +- bridge phandle: + arm,vexpress,config-bridge = <phandle>; +This property can be also defined in a parent node (eg. for a DCC) +and is effective for all children. + + +Platform topology +----------------- + +As Versatile Express can be configured in number of physically +different setups, the device tree should describe platform topology. +Root node and main motherboard node must define the following +property, describing physical location of the children nodes: +- site number: + arm,vexpress,site = <number>; + where 0 means motherboard, 1 or 2 are daugtherboard sites, + 0xf means "master" site (site containing main CPU tile) +- when daughterboards are stacked on one site, their position + in the stack be be described with: + arm,vexpress,position = <number>; +- when describing tiles consisting more than one DCC, its number + can be described with: + arm,vexpress,dcc = <number>; + +Any of the numbers above defaults to zero if not defined in +the node or any of its parent. + + +Motherboard +----------- + The motherboard description file provides a single "motherboard" node using 2 address cells corresponding to the Static Memory Bus used between the motherboard and the tile. The first cell defines the Chip @@ -87,22 +141,30 @@ can be used to obtain required phandle in the tile's "aliases" node: - SP804 timers: v2m_timer01 and v2m_timer23 -Current Linux implementation requires a "arm,v2m_timer" alias -pointing at one of the motherboard's SP804 timers, if it is to be -used as the system timer. This alias should be defined in the -motherboard files. +The tile description should define a "smb" node, describing the +Static Memory Bus between the tile and motherboard. It must define +the following properties: +- "simple-bus" compatible value (to ensure creation of the children) + compatible = "simple-bus"; +- mapping of the SMB CS/offset addresses into main address space: + #address-cells = <2>; + #size-cells = <1>; + ranges = <...>; +- interrupts mapping: + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 63>; + interrupt-map = <...>; -The tile description must define "ranges", "interrupt-map-mask" and -"interrupt-map" properties to translate the motherboard's address -and interrupt space into one used by the tile's processor. -Abbreviated example: +Example of a VE tile description (simplified) +--------------------------------------------- /dts-v1/; / { model = "V2P-CA5s"; arm,hbi = <0x225>; + arm,vexpress,site = <0xf>; compatible = "arm,vexpress-v2p-ca5s", "arm,vexpress"; interrupt-parent = <&gic>; #address-cells = <1>; @@ -134,13 +196,29 @@ Abbreviated example: <0x2c000100 0x100>; }; - motherboard { + dcc { + compatible = "simple-bus"; + arm,vexpress,config-bridge = <&v2m_sysreg>; + + osc@0 { + compatible = "arm,vexpress-osc"; + }; + }; + + smb { + compatible = "simple-bus"; + + #address-cells = <2>; + #size-cells = <1>; /* CS0 is visible at 0x08000000 */ ranges = <0 0 0x08000000 0x04000000>; + + #interrupt-cells = <1>; interrupt-map-mask = <0 0 63>; /* Active high IRQ 0 is connected to GIC's SPI0 */ interrupt-map = <0 0 0 &gic 0 0 4>; + + /include/ "vexpress-v2m-rs1.dtsi" }; }; -/include/ "vexpress-v2m-rs1.dtsi" diff --git a/Documentation/devicetree/bindings/ata/exynos-sata-phy.txt b/Documentation/devicetree/bindings/ata/exynos-sata-phy.txt new file mode 100644 index 000000000000..37824fac688e --- /dev/null +++ b/Documentation/devicetree/bindings/ata/exynos-sata-phy.txt @@ -0,0 +1,14 @@ +* Samsung SATA PHY Controller + +SATA PHY nodes are defined to describe on-chip SATA Physical layer controllers. +Each SATA PHY controller should have its own node. + +Required properties: +- compatible : compatible list, contains "samsung,exynos5-sata-phy" +- reg : <registers mapping> + +Example: + sata@ffe07000 { + compatible = "samsung,exynos5-sata-phy"; + reg = <0xffe07000 0x1000>; + }; diff --git a/Documentation/devicetree/bindings/ata/exynos-sata.txt b/Documentation/devicetree/bindings/ata/exynos-sata.txt new file mode 100644 index 000000000000..0849f1025e34 --- /dev/null +++ b/Documentation/devicetree/bindings/ata/exynos-sata.txt @@ -0,0 +1,17 @@ +* Samsung AHCI SATA Controller + +SATA nodes are defined to describe on-chip Serial ATA controllers. +Each SATA controller should have its own node. + +Required properties: +- compatible : compatible list, contains "samsung,exynos5-sata" +- interrupts : <interrupt mapping for SATA IRQ> +- reg : <registers mapping> +- samsung,sata-freq : <frequency in MHz> + +Example: + sata@ffe08000 { + compatible = "samsung,exynos5-sata"; + reg = <0xffe08000 0x1000>; + interrupts = <115>; + }; diff --git a/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt b/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt index d2fe064a828b..63dd8051521c 100644 --- a/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt +++ b/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt @@ -2,9 +2,27 @@ properties: - compatible : Should be "ti,omap-ocp2scp" +- reg : Address and length of the register set for the device - #address-cells, #size-cells : Must be present if the device has sub-nodes - ranges : the child address space are mapped 1:1 onto the parent address space - ti,hwmods : must be "ocp2scp_usb_phy" Sub-nodes: All the devices connected to ocp2scp are described using sub-node to ocp2scp + +ocp2scp@4a0ad000 { + compatible = "ti,omap-ocp2scp"; + reg = <0x4a0ad000 0x1f>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + ti,hwmods = "ocp2scp_usb_phy"; + + subnode1 { + ... + }; + + subnode2 { + ... + }; +}; diff --git a/Documentation/devicetree/bindings/clock/imx23-clock.txt b/Documentation/devicetree/bindings/clock/imx23-clock.txt index a0b867ef8d96..baadbb11fe98 100644 --- a/Documentation/devicetree/bindings/clock/imx23-clock.txt +++ b/Documentation/devicetree/bindings/clock/imx23-clock.txt @@ -52,7 +52,7 @@ clocks and IDs. lcdif 38 etm 39 usb 40 - usb_pwr 41 + usb_phy 41 Examples: diff --git a/Documentation/devicetree/bindings/clock/imx25-clock.txt b/Documentation/devicetree/bindings/clock/imx25-clock.txt new file mode 100644 index 000000000000..c2a3525ecb4e --- /dev/null +++ b/Documentation/devicetree/bindings/clock/imx25-clock.txt @@ -0,0 +1,162 @@ +* Clock bindings for Freescale i.MX25 + +Required properties: +- compatible: Should be "fsl,imx25-ccm" +- reg: Address and length of the register set +- interrupts: Should contain CCM interrupt +- #clock-cells: Should be <1> + +The clock consumer should specify the desired clock by having the clock +ID in its "clocks" phandle cell. The following is a full list of i.MX25 +clocks and IDs. + + Clock ID + --------------------------- + dummy 0 + osc 1 + mpll 2 + upll 3 + mpll_cpu_3_4 4 + cpu_sel 5 + cpu 6 + ahb 7 + usb_div 8 + ipg 9 + per0_sel 10 + per1_sel 11 + per2_sel 12 + per3_sel 13 + per4_sel 14 + per5_sel 15 + per6_sel 16 + per7_sel 17 + per8_sel 18 + per9_sel 19 + per10_sel 20 + per11_sel 21 + per12_sel 22 + per13_sel 23 + per14_sel 24 + per15_sel 25 + per0 26 + per1 27 + per2 28 + per3 29 + per4 30 + per5 31 + per6 32 + per7 33 + per8 34 + per9 35 + per10 36 + per11 37 + per12 38 + per13 39 + per14 40 + per15 41 + csi_ipg_per 42 + epit_ipg_per 43 + esai_ipg_per 44 + esdhc1_ipg_per 45 + esdhc2_ipg_per 46 + gpt_ipg_per 47 + i2c_ipg_per 48 + lcdc_ipg_per 49 + nfc_ipg_per 50 + owire_ipg_per 51 + pwm_ipg_per 52 + sim1_ipg_per 53 + sim2_ipg_per 54 + ssi1_ipg_per 55 + ssi2_ipg_per 56 + uart_ipg_per 57 + ata_ahb 58 + reserved 59 + csi_ahb 60 + emi_ahb 61 + esai_ahb 62 + esdhc1_ahb 63 + esdhc2_ahb 64 + fec_ahb 65 + lcdc_ahb 66 + rtic_ahb 67 + sdma_ahb 68 + slcdc_ahb 69 + usbotg_ahb 70 + reserved 71 + reserved 72 + reserved 73 + reserved 74 + can1_ipg 75 + can2_ipg 76 + csi_ipg 77 + cspi1_ipg 78 + cspi2_ipg 79 + cspi3_ipg 80 + dryice_ipg 81 + ect_ipg 82 + epit1_ipg 83 + epit2_ipg 84 + reserved 85 + esdhc1_ipg 86 + esdhc2_ipg 87 + fec_ipg 88 + reserved 89 + reserved 90 + reserved 91 + gpt1_ipg 92 + gpt2_ipg 93 + gpt3_ipg 94 + gpt4_ipg 95 + reserved 96 + reserved 97 + reserved 98 + iim_ipg 99 + reserved 100 + reserved 101 + kpp_ipg 102 + lcdc_ipg 103 + reserved 104 + pwm1_ipg 105 + pwm2_ipg 106 + pwm3_ipg 107 + pwm4_ipg 108 + rngb_ipg 109 + reserved 110 + scc_ipg 111 + sdma_ipg 112 + sim1_ipg 113 + sim2_ipg 114 + slcdc_ipg 115 + spba_ipg 116 + ssi1_ipg 117 + ssi2_ipg 118 + tsc_ipg 119 + uart1_ipg 120 + uart2_ipg 121 + uart3_ipg 122 + uart4_ipg 123 + uart5_ipg 124 + reserved 125 + wdt_ipg 126 + +Examples: + +clks: ccm@53f80000 { + compatible = "fsl,imx25-ccm"; + reg = <0x53f80000 0x4000>; + interrupts = <31>; + clock-output-names = ... + "uart_ipg", + "uart_serial", + ...; +}; + +uart1: serial@43f90000 { + compatible = "fsl,imx25-uart", "fsl,imx21-uart"; + reg = <0x43f90000 0x4000>; + interrupts = <45>; + clocks = <&clks 79>, <&clks 50>; + clock-names = "ipg", "per"; + status = "disabled"; +}; diff --git a/Documentation/devicetree/bindings/clock/imx28-clock.txt b/Documentation/devicetree/bindings/clock/imx28-clock.txt index aa2af2866fe8..52a49a4a50b3 100644 --- a/Documentation/devicetree/bindings/clock/imx28-clock.txt +++ b/Documentation/devicetree/bindings/clock/imx28-clock.txt @@ -73,8 +73,8 @@ clocks and IDs. can1 59 usb0 60 usb1 61 - usb0_pwr 62 - usb1_pwr 63 + usb0_phy 62 + usb1_phy 63 enet_out 64 Examples: diff --git a/Documentation/devicetree/bindings/clock/imx5-clock.txt b/Documentation/devicetree/bindings/clock/imx5-clock.txt new file mode 100644 index 000000000000..04ad47876be0 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/imx5-clock.txt @@ -0,0 +1,191 @@ +* Clock bindings for Freescale i.MX5 + +Required properties: +- compatible: Should be "fsl,<soc>-ccm" , where <soc> can be imx51 or imx53 +- reg: Address and length of the register set +- interrupts: Should contain CCM interrupt +- #clock-cells: Should be <1> + +The clock consumer should specify the desired clock by having the clock +ID in its "clocks" phandle cell. The following is a full list of i.MX5 +clocks and IDs. + + Clock ID + --------------------------- + dummy 0 + ckil 1 + osc 2 + ckih1 3 + ckih2 4 + ahb 5 + ipg 6 + axi_a 7 + axi_b 8 + uart_pred 9 + uart_root 10 + esdhc_a_pred 11 + esdhc_b_pred 12 + esdhc_c_s 13 + esdhc_d_s 14 + emi_sel 15 + emi_slow_podf 16 + nfc_podf 17 + ecspi_pred 18 + ecspi_podf 19 + usboh3_pred 20 + usboh3_podf 21 + usb_phy_pred 22 + usb_phy_podf 23 + cpu_podf 24 + di_pred 25 + tve_di 26 + tve_s 27 + uart1_ipg_gate 28 + uart1_per_gate 29 + uart2_ipg_gate 30 + uart2_per_gate 31 + uart3_ipg_gate 32 + uart3_per_gate 33 + i2c1_gate 34 + i2c2_gate 35 + gpt_ipg_gate 36 + pwm1_ipg_gate 37 + pwm1_hf_gate 38 + pwm2_ipg_gate 39 + pwm2_hf_gate 40 + gpt_hf_gate 41 + fec_gate 42 + usboh3_per_gate 43 + esdhc1_ipg_gate 44 + esdhc2_ipg_gate 45 + esdhc3_ipg_gate 46 + esdhc4_ipg_gate 47 + ssi1_ipg_gate 48 + ssi2_ipg_gate 49 + ssi3_ipg_gate 50 + ecspi1_ipg_gate 51 + ecspi1_per_gate 52 + ecspi2_ipg_gate 53 + ecspi2_per_gate 54 + cspi_ipg_gate 55 + sdma_gate 56 + emi_slow_gate 57 + ipu_s 58 + ipu_gate 59 + nfc_gate 60 + ipu_di1_gate 61 + vpu_s 62 + vpu_gate 63 + vpu_reference_gate 64 + uart4_ipg_gate 65 + uart4_per_gate 66 + uart5_ipg_gate 67 + uart5_per_gate 68 + tve_gate 69 + tve_pred 70 + esdhc1_per_gate 71 + esdhc2_per_gate 72 + esdhc3_per_gate 73 + esdhc4_per_gate 74 + usb_phy_gate 75 + hsi2c_gate 76 + mipi_hsc1_gate 77 + mipi_hsc2_gate 78 + mipi_esc_gate 79 + mipi_hsp_gate 80 + ldb_di1_div_3_5 81 + ldb_di1_div 82 + ldb_di0_div_3_5 83 + ldb_di0_div 84 + ldb_di1_gate 85 + can2_serial_gate 86 + can2_ipg_gate 87 + i2c3_gate 88 + lp_apm 89 + periph_apm 90 + main_bus 91 + ahb_max 92 + aips_tz1 93 + aips_tz2 94 + tmax1 95 + tmax2 96 + tmax3 97 + spba 98 + uart_sel 99 + esdhc_a_sel 100 + esdhc_b_sel 101 + esdhc_a_podf 102 + esdhc_b_podf 103 + ecspi_sel 104 + usboh3_sel 105 + usb_phy_sel 106 + iim_gate 107 + usboh3_gate 108 + emi_fast_gate 109 + ipu_di0_gate 110 + gpc_dvfs 111 + pll1_sw 112 + pll2_sw 113 + pll3_sw 114 + ipu_di0_sel 115 + ipu_di1_sel 116 + tve_ext_sel 117 + mx51_mipi 118 + pll4_sw 119 + ldb_di1_sel 120 + di_pll4_podf 121 + ldb_di0_sel 122 + ldb_di0_gate 123 + usb_phy1_gate 124 + usb_phy2_gate 125 + per_lp_apm 126 + per_pred1 127 + per_pred2 128 + per_podf 129 + per_root 130 + ssi_apm 131 + ssi1_root_sel 132 + ssi2_root_sel 133 + ssi3_root_sel 134 + ssi_ext1_sel 135 + ssi_ext2_sel 136 + ssi_ext1_com_sel 137 + ssi_ext2_com_sel 138 + ssi1_root_pred 139 + ssi1_root_podf 140 + ssi2_root_pred 141 + ssi2_root_podf 142 + ssi_ext1_pred 143 + ssi_ext1_podf 144 + ssi_ext2_pred 145 + ssi_ext2_podf 146 + ssi1_root_gate 147 + ssi2_root_gate 148 + ssi3_root_gate 149 + ssi_ext1_gate 150 + ssi_ext2_gate 151 + epit1_ipg_gate 152 + epit1_hf_gate 153 + epit2_ipg_gate 154 + epit2_hf_gate 155 + can_sel 156 + can1_serial_gate 157 + can1_ipg_gate 158 + +Examples (for mx53): + +clks: ccm@53fd4000{ + compatible = "fsl,imx53-ccm"; + reg = <0x53fd4000 0x4000>; + interrupts = <0 71 0x04 0 72 0x04>; + #clock-cells = <1>; +}; + +can1: can@53fc8000 { + compatible = "fsl,imx53-flexcan", "fsl,p1010-flexcan"; + reg = <0x53fc8000 0x4000>; + interrupts = <82>; + clocks = <&clks 158>, <&clks 157>; + clock-names = "ipg", "per"; + status = "disabled"; +}; diff --git a/Documentation/devicetree/bindings/clock/imx6q-clock.txt b/Documentation/devicetree/bindings/clock/imx6q-clock.txt index 492bd991d52a..d77b4e68dc42 100644 --- a/Documentation/devicetree/bindings/clock/imx6q-clock.txt +++ b/Documentation/devicetree/bindings/clock/imx6q-clock.txt @@ -187,9 +187,9 @@ clocks and IDs. pll3_usb_otg 172 pll4_audio 173 pll5_video 174 - pll6_mlb 175 + pll8_mlb 175 pll7_usb_host 176 - pll8_enet 177 + pll6_enet 177 ssi1_ipg 178 ssi2_ipg 179 ssi3_ipg 180 @@ -198,6 +198,11 @@ clocks and IDs. usbphy2 183 ldb_di0_div_3_5 184 ldb_di1_div_3_5 185 + sata_ref 186 + sata_ref_100m 187 + pcie_ref 188 + pcie_ref_125m 189 + enet_ref 190 Examples: diff --git a/Documentation/devicetree/bindings/clock/zynq-7000.txt b/Documentation/devicetree/bindings/clock/zynq-7000.txt new file mode 100644 index 000000000000..23ae1db1bc13 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/zynq-7000.txt @@ -0,0 +1,55 @@ +Device Tree Clock bindings for the Zynq 7000 EPP + +The Zynq EPP has several different clk providers, each with there own bindings. +The purpose of this document is to document their usage. + +See clock_bindings.txt for more information on the generic clock bindings. +See Chapter 25 of Zynq TRM for more information about Zynq clocks. + +== PLLs == + +Used to describe the ARM_PLL, DDR_PLL, and IO_PLL. + +Required properties: +- #clock-cells : shall be 0 (only one clock is output from this node) +- compatible : "xlnx,zynq-pll" +- reg : pair of u32 values, which are the address offsets within the SLCR + of the relevant PLL_CTRL register and PLL_CFG register respectively +- clocks : phandle for parent clock. should be the phandle for ps_clk + +Optional properties: +- clock-output-names : name of the output clock + +Example: + armpll: armpll { + #clock-cells = <0>; + compatible = "xlnx,zynq-pll"; + clocks = <&ps_clk>; + reg = <0x100 0x110>; + clock-output-names = "armpll"; + }; + +== Peripheral clocks == + +Describes clock node for the SDIO, SMC, SPI, QSPI, and UART clocks. + +Required properties: +- #clock-cells : shall be 1 +- compatible : "xlnx,zynq-periph-clock" +- reg : a single u32 value, describing the offset within the SLCR where + the CLK_CTRL register is found for this peripheral +- clocks : phandle for parent clocks. should hold phandles for + the IO_PLL, ARM_PLL, and DDR_PLL in order +- clock-output-names : names of the output clock(s). For peripherals that have + two output clocks (for example, the UART), two clocks + should be listed. + +Example: + uart_clk: uart_clk { + #clock-cells = <1>; + compatible = "xlnx,zynq-periph-clock"; + clocks = <&iopll &armpll &ddrpll>; + reg = <0x154>; + clock-output-names = "uart0_ref_clk", + "uart1_ref_clk"; + }; diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt new file mode 100644 index 000000000000..f3d44984d91c --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt @@ -0,0 +1,42 @@ +SPEAr cpufreq driver +------------------- + +SPEAr SoC cpufreq driver for CPU frequency scaling. +It supports both uniprocessor (UP) and symmetric multiprocessor (SMP) systems +which share clock across all CPUs. + +Required properties: +- cpufreq_tbl: Table of frequencies CPU could be transitioned into, in the + increasing order. + +Optional properties: +- clock-latency: Specify the possible maximum transition latency for clock, in + unit of nanoseconds. + +Both required and optional properties listed above must be defined under node +/cpus/cpu@0. + +Examples: +-------- +cpus { + + <...> + + cpu@0 { + compatible = "arm,cortex-a9"; + reg = <0>; + + <...> + + cpufreq_tbl = < 166000 + 200000 + 250000 + 300000 + 400000 + 500000 + 600000 >; + }; + + <...> + +}; diff --git a/Documentation/devicetree/bindings/drm/exynos/hdmi.txt b/Documentation/devicetree/bindings/drm/exynos/hdmi.txt new file mode 100644 index 000000000000..589edee37394 --- /dev/null +++ b/Documentation/devicetree/bindings/drm/exynos/hdmi.txt @@ -0,0 +1,22 @@ +Device-Tree bindings for drm hdmi driver + +Required properties: +- compatible: value should be "samsung,exynos5-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. + +Example: + + hdmi { + compatible = "samsung,exynos5-hdmi"; + reg = <0x14530000 0x100000>; + interrupts = <0 95 0>; + hpd-gpio = <&gpx3 7 0xf 1 3>; + }; diff --git a/Documentation/devicetree/bindings/drm/exynos/hdmiddc.txt b/Documentation/devicetree/bindings/drm/exynos/hdmiddc.txt new file mode 100644 index 000000000000..fa166d945809 --- /dev/null +++ b/Documentation/devicetree/bindings/drm/exynos/hdmiddc.txt @@ -0,0 +1,12 @@ +Device-Tree bindings for hdmiddc driver + +Required properties: +- compatible: value should be "samsung,exynos5-hdmiddc". +- reg: I2C address of the hdmiddc device. + +Example: + + hdmiddc { + compatible = "samsung,exynos5-hdmiddc"; + reg = <0x50>; + }; diff --git a/Documentation/devicetree/bindings/drm/exynos/hdmiphy.txt b/Documentation/devicetree/bindings/drm/exynos/hdmiphy.txt new file mode 100644 index 000000000000..858f4f9b902f --- /dev/null +++ b/Documentation/devicetree/bindings/drm/exynos/hdmiphy.txt @@ -0,0 +1,12 @@ +Device-Tree bindings for hdmiphy driver + +Required properties: +- compatible: value should be "samsung,exynos5-hdmiphy". +- reg: I2C address of the hdmiphy device. + +Example: + + hdmiphy { + compatible = "samsung,exynos5-hdmiphy"; + reg = <0x38>; + }; diff --git a/Documentation/devicetree/bindings/drm/exynos/mixer.txt b/Documentation/devicetree/bindings/drm/exynos/mixer.txt new file mode 100644 index 000000000000..9b2ea0343566 --- /dev/null +++ b/Documentation/devicetree/bindings/drm/exynos/mixer.txt @@ -0,0 +1,15 @@ +Device-Tree bindings for mixer driver + +Required properties: +- compatible: value should be "samsung,exynos5-mixer". +- reg: physical base address of the mixer and length of memory mapped + region. +- interrupts: interrupt number to the cpu. + +Example: + + mixer { + compatible = "samsung,exynos5-mixer"; + reg = <0x14450000 0x10000>; + interrupts = <0 94 0>; + }; diff --git a/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt b/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt new file mode 100644 index 000000000000..558cdf3c9abc --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt @@ -0,0 +1,22 @@ +GPIO line that should be set high/low to power off a device + +Required properties: +- compatible : should be "gpio-poweroff". +- gpios : The GPIO to set high/low, see "gpios property" in + Documentation/devicetree/bindings/gpio/gpio.txt. If the pin should be + low to power down the board set it to "Active Low", otherwise set + gpio to "Active High". + +Optional properties: +- input : Initially configure the GPIO line as an input. Only reconfigure + it to an output when the pm_power_off function is called. If this optional + property is not specified, the GPIO is initialized as an output in its + inactive state. + + +Examples: + +gpio-poweroff { + compatible = "gpio-poweroff"; + gpios = <&gpio 4 0>; /* GPIO 4 Active Low */ +}; diff --git a/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt b/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt new file mode 100644 index 000000000000..a0e4cf885213 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt @@ -0,0 +1,18 @@ +STMPE gpio +---------- + +Required properties: + - compatible: "st,stmpe-gpio" + +Optional properties: + - st,norequest-mask: bitmask specifying which GPIOs should _not_ be requestable + due to different usage (e.g. touch, keypad) + +Node name must be stmpe_gpio and should be child node of stmpe node to which it +belongs. + +Example: + stmpe_gpio { + compatible = "st,stmpe-gpio"; + st,norequest-mask = <0x20>; //gpio 5 can't be used + }; diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt index 4e16ba4feab0..a33628759d36 100644 --- a/Documentation/devicetree/bindings/gpio/gpio.txt +++ b/Documentation/devicetree/bindings/gpio/gpio.txt @@ -75,4 +75,40 @@ Example of two SOC GPIO banks defined as gpio-controller nodes: gpio-controller; }; +2.1) gpio-controller and pinctrl subsystem +------------------------------------------ +gpio-controller on a SOC might be tightly coupled with the pinctrl +subsystem, in the sense that the pins can be used by other functions +together with optional gpio feature. + +While the pin allocation is totally managed by the pin ctrl subsystem, +gpio (under gpiolib) is still maintained by gpio drivers. It may happen +that different pin ranges in a SoC is managed by different gpio drivers. + +This makes it logical to let gpio drivers announce their pin ranges to +the pin ctrl subsystem and call 'pinctrl_request_gpio' in order to +request the corresponding pin before any gpio usage. + +For this, the gpio controller can use a pinctrl phandle and pins to +announce the pinrange to the pin ctrl subsystem. For example, + + qe_pio_e: gpio-controller@1460 { + #gpio-cells = <2>; + compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank"; + reg = <0x1460 0x18>; + gpio-controller; + gpio-ranges = <&pinctrl1 20 10>, <&pinctrl2 50 20>; + + } + +where, + &pinctrl1 and &pinctrl2 is the phandle to the pinctrl DT node. + + Next values specify the base pin and number of pins for the range + handled by 'qe_pio_e' gpio. In the given example from base pin 20 to + pin 29 under pinctrl1 and pin 50 to pin 69 under pinctrl2 is handled + by this gpio controller. + +The pinctrl node must have "#gpio-range-cells" property to show number of +arguments to pass with phandle from gpio controllers node. diff --git a/Documentation/devicetree/bindings/gpio/gpio_atmel.txt b/Documentation/devicetree/bindings/gpio/gpio_atmel.txt index 66efc804806a..85f8c0d084fa 100644 --- a/Documentation/devicetree/bindings/gpio/gpio_atmel.txt +++ b/Documentation/devicetree/bindings/gpio/gpio_atmel.txt @@ -9,6 +9,10 @@ Required properties: unused). - gpio-controller: Marks the device node as a GPIO controller. +optional properties: +- #gpio-lines: Number of gpio if absent 32. + + Example: pioA: gpio@fffff200 { compatible = "atmel,at91rm9200-gpio"; @@ -16,5 +20,6 @@ Example: interrupts = <2 4>; #gpio-cells = <2>; gpio-controller; + #gpio-lines = <19>; }; diff --git a/Documentation/devicetree/bindings/gpio/leds-ns2.txt b/Documentation/devicetree/bindings/gpio/leds-ns2.txt new file mode 100644 index 000000000000..aef3aca34d2d --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/leds-ns2.txt @@ -0,0 +1,26 @@ +Binding for dual-GPIO LED found on Network Space v2 (and parents). + +Required properties: +- compatible: "lacie,ns2-leds". + +Each LED is represented as a sub-node of the ns2-leds device. + +Required sub-node properties: +- cmd-gpio: Command LED GPIO. See OF device-tree GPIO specification. +- slow-gpio: Slow LED GPIO. See OF device-tree GPIO specification. + +Optional sub-node properties: +- label: Name for this LED. If omitted, the label is taken from the node name. +- linux,default-trigger: Trigger assigned to the LED. + +Example: + +ns2-leds { + compatible = "lacie,ns2-leds"; + + blue-sata { + label = "ns2:blue:sata"; + slow-gpio = <&gpio0 29 0>; + cmd-gpio = <&gpio0 30 0>; + }; +}; diff --git a/Documentation/devicetree/bindings/gpio/spear_spics.txt b/Documentation/devicetree/bindings/gpio/spear_spics.txt new file mode 100644 index 000000000000..96c37eb15075 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/spear_spics.txt @@ -0,0 +1,50 @@ +=== ST Microelectronics SPEAr SPI CS Driver === + +SPEAr platform provides a provision to control chipselects of ARM PL022 Prime +Cell spi controller through its system registers, which otherwise remains under +PL022 control. If chipselect remain under PL022 control then they would be +released as soon as transfer is over and TxFIFO becomes empty. This is not +desired by some of the device protocols above spi which expect (multiple) +transfers without releasing their chipselects. + +Chipselects can be controlled by software by turning them as GPIOs. SPEAr +provides another interface through system registers through which software can +directly control each PL022 chipselect. Hence, it is natural for SPEAr to export +the control of this interface as gpio. + +Required properties: + + * compatible: should be defined as "st,spear-spics-gpio" + * reg: mentioning address range of spics controller + * st-spics,peripcfg-reg: peripheral configuration register offset + * st-spics,sw-enable-bit: bit offset to enable sw control + * st-spics,cs-value-bit: bit offset to drive chipselect low or high + * st-spics,cs-enable-mask: chip select number bit mask + * st-spics,cs-enable-shift: chip select number program offset + * gpio-controller: Marks the device node as gpio controller + * #gpio-cells: should be 1 and will mention chip select number + +All the above bit offsets are within peripcfg register. + +Example: +------- +spics: spics@e0700000{ + compatible = "st,spear-spics-gpio"; + reg = <0xe0700000 0x1000>; + st-spics,peripcfg-reg = <0x3b0>; + st-spics,sw-enable-bit = <12>; + st-spics,cs-value-bit = <11>; + st-spics,cs-enable-mask = <3>; + st-spics,cs-enable-shift = <8>; + gpio-controller; + #gpio-cells = <2>; +}; + + +spi0: spi@e0100000 { + status = "okay"; + num-cs = <3>; + cs-gpios = <&gpio1 7 0>, <&spics 0>, + <&spics 1>; + ... +} diff --git a/Documentation/devicetree/bindings/hwmon/vexpress.txt b/Documentation/devicetree/bindings/hwmon/vexpress.txt new file mode 100644 index 000000000000..9c27ed694bbb --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/vexpress.txt @@ -0,0 +1,23 @@ +Versatile Express hwmon sensors +------------------------------- + +Requires node properties: +- "compatible" value : one of + "arm,vexpress-volt" + "arm,vexpress-amp" + "arm,vexpress-temp" + "arm,vexpress-power" + "arm,vexpress-energy" +- "arm,vexpress-sysreg,func" when controlled via vexpress-sysreg + (see Documentation/devicetree/bindings/arm/vexpress-sysreg.txt + for more details) + +Optional node properties: +- label : string describing the monitored value + +Example: + energy@0 { + compatible = "arm,vexpress-energy"; + arm,vexpress-sysreg,func = <13 0>; + label = "A15 Jcore"; + }; diff --git a/Documentation/devicetree/bindings/i2c/atmel-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt index b689a0d9441c..b689a0d9441c 100644 --- a/Documentation/devicetree/bindings/i2c/atmel-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt diff --git a/Documentation/devicetree/bindings/i2c/davinci.txt b/Documentation/devicetree/bindings/i2c/i2c-davinci.txt index 2dc935b4113d..2dc935b4113d 100644 --- a/Documentation/devicetree/bindings/i2c/davinci.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-davinci.txt diff --git a/Documentation/devicetree/bindings/i2c/gpio-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-gpio.txt index 4f8ec947c6bd..4f8ec947c6bd 100644 --- a/Documentation/devicetree/bindings/i2c/gpio-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-gpio.txt diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-imx.txt index f3cf43b66f7e..3614242e7732 100644 --- a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-imx.txt @@ -12,13 +12,13 @@ Optional properties: Examples: i2c@83fc4000 { /* I2C2 on i.MX51 */ - compatible = "fsl,imx51-i2c", "fsl,imx1-i2c"; + compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; reg = <0x83fc4000 0x4000>; interrupts = <63>; }; i2c@70038000 { /* HS-I2C on i.MX51 */ - compatible = "fsl,imx51-i2c", "fsl,imx1-i2c"; + compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; reg = <0x70038000 0x4000>; interrupts = <64>; clock-frequency = <400000>; diff --git a/Documentation/devicetree/bindings/i2c/fsl-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-mpc.txt index 1eacd6b20ed5..1eacd6b20ed5 100644 --- a/Documentation/devicetree/bindings/i2c/fsl-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-mpc.txt diff --git a/Documentation/devicetree/bindings/i2c/mux.txt b/Documentation/devicetree/bindings/i2c/i2c-mux.txt index af84cce5cd7b..af84cce5cd7b 100644 --- a/Documentation/devicetree/bindings/i2c/mux.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-mux.txt diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt new file mode 100644 index 000000000000..f46d928aa73d --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt @@ -0,0 +1,18 @@ + +* Marvell MV64XXX I2C controller + +Required properties : + + - reg : Offset and length of the register set for the device + - compatible : Should be "marvell,mv64xxx-i2c" + - interrupts : The interrupt number + - clock-frequency : Desired I2C bus clock frequency in Hz. + +Examples: + + i2c@11000 { + compatible = "marvell,mv64xxx-i2c"; + reg = <0x11000 0x20>; + interrupts = <29>; + clock-frequency = <100000>; + }; diff --git a/Documentation/devicetree/bindings/i2c/nomadik.txt b/Documentation/devicetree/bindings/i2c/i2c-nomadik.txt index 72065b0ff680..72065b0ff680 100644 --- a/Documentation/devicetree/bindings/i2c/nomadik.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-nomadik.txt diff --git a/Documentation/devicetree/bindings/i2c/cavium-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-octeon.txt index dced82ebe31d..dced82ebe31d 100644 --- a/Documentation/devicetree/bindings/i2c/cavium-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-octeon.txt diff --git a/Documentation/devicetree/bindings/i2c/omap-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-omap.txt index 56564aa4b444..56564aa4b444 100644 --- a/Documentation/devicetree/bindings/i2c/omap-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-omap.txt diff --git a/Documentation/devicetree/bindings/i2c/pnx.txt b/Documentation/devicetree/bindings/i2c/i2c-pnx.txt index fe98ada33ee4..fe98ada33ee4 100644 --- a/Documentation/devicetree/bindings/i2c/pnx.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-pnx.txt diff --git a/Documentation/devicetree/bindings/i2c/ce4100-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-pxa-pci-ce4100.txt index 569b16248514..569b16248514 100644 --- a/Documentation/devicetree/bindings/i2c/ce4100-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-pxa-pci-ce4100.txt diff --git a/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-pxa.txt index 0f7945019f6f..12b78ac507e9 100644 --- a/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-pxa.txt @@ -31,21 +31,3 @@ Examples: reg = <0xd4025000 0x1000>; interrupts = <58>; }; - -* Marvell MV64XXX I2C controller - -Required properties : - - - reg : Offset and length of the register set for the device - - compatible : Should be "marvell,mv64xxx-i2c" - - interrupts : The interrupt number - - clock-frequency : Desired I2C bus clock frequency in Hz. - -Examples: - - i2c@11000 { - compatible = "marvell,mv64xxx-i2c"; - reg = <0x11000 0x20>; - interrupts = <29>; - clock-frequency = <100000>; - }; diff --git a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-s3c2410.txt index b6cb5a12c672..b6cb5a12c672 100644 --- a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-s3c2410.txt diff --git a/Documentation/devicetree/bindings/i2c/sirf-i2c.txt b/Documentation/devicetree/bindings/i2c/i2c-sirf.txt index 7baf9e133fa8..7baf9e133fa8 100644 --- a/Documentation/devicetree/bindings/i2c/sirf-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-sirf.txt diff --git a/Documentation/devicetree/bindings/i2c/arm-versatile.txt b/Documentation/devicetree/bindings/i2c/i2c-versatile.txt index 361d31c51b6f..361d31c51b6f 100644 --- a/Documentation/devicetree/bindings/i2c/arm-versatile.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-versatile.txt diff --git a/Documentation/devicetree/bindings/i2c/xiic.txt b/Documentation/devicetree/bindings/i2c/i2c-xiic.txt index ceabbe91ae44..ceabbe91ae44 100644 --- a/Documentation/devicetree/bindings/i2c/xiic.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-xiic.txt diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt index 2f5322b119eb..446859fcdca4 100644 --- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt +++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt @@ -55,5 +55,7 @@ st-micro,24c256 i2c serial eeprom (24cxx) stm,m41t00 Serial Access TIMEKEEPER stm,m41t62 Serial real-time clock (RTC) with alarm stm,m41t80 M41T80 - SERIAL ACCESS RTC WITH ALARMS +taos,tsl2550 Ambient Light Sensor with SMBUS/Two Wire Serial Interface ti,tsc2003 I2C Touch-Screen Controller ti,tmp102 Low Power Digital Temperature Sensor with SMBUS/Two Wire Serial Interface +ti,tmp275 Digital Temperature Sensor diff --git a/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt b/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt new file mode 100644 index 000000000000..ca5a2c86480c --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt @@ -0,0 +1,28 @@ +* Rohm BU21013 Touch Screen + +Required properties: + - compatible : "rohm,bu21013_tp" + - reg : I2C device address + +Optional properties: + - touch-gpio : GPIO pin registering a touch event + - <supply_name>-supply : Phandle to a regulator supply + - rohm,touch-max-x : Maximum outward permitted limit in the X axis + - rohm,touch-max-y : Maximum outward permitted limit in the Y axis + - rohm,flip-x : Flip touch coordinates on the X axis + - rohm,flip-y : Flip touch coordinates on the Y axis + +Example: + + i2c@80110000 { + bu21013_tp@0x5c { + compatible = "rohm,bu21013_tp"; + reg = <0x5c>; + touch-gpio = <&gpio2 20 0x4>; + avdd-supply = <&ab8500_ldo_aux1_reg>; + + rohm,touch-max-x = <384>; + rohm,touch-max-y = <704>; + rohm,flip-y; + }; + }; diff --git a/Documentation/devicetree/bindings/interrupt-controller/allwinner,sunxi-ic.txt b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sunxi-ic.txt new file mode 100644 index 000000000000..7f9fb85f5456 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/allwinner,sunxi-ic.txt @@ -0,0 +1,104 @@ +Allwinner Sunxi Interrupt Controller + +Required properties: + +- compatible : should be "allwinner,sunxi-ic" +- reg : Specifies base physical address and size of the registers. +- interrupt-controller : Identifies the node as an interrupt controller +- #interrupt-cells : Specifies the number of cells needed to encode an + interrupt source. The value shall be 1. + +The interrupt sources are as follows: + +0: ENMI +1: UART0 +2: UART1 +3: UART2 +4: UART3 +5: IR0 +6: IR1 +7: I2C0 +8: I2C1 +9: I2C2 +10: SPI0 +11: SPI1 +12: SPI2 +13: SPDIF +14: AC97 +15: TS +16: I2S +17: UART4 +18: UART5 +19: UART6 +20: UART7 +21: KEYPAD +22: TIMER0 +23: TIMER1 +24: TIMER2 +25: TIMER3 +26: CAN +27: DMA +28: PIO +29: TOUCH_PANEL +30: AUDIO_CODEC +31: LRADC +32: SDMC0 +33: SDMC1 +34: SDMC2 +35: SDMC3 +36: MEMSTICK +37: NAND +38: USB0 +39: USB1 +40: USB2 +41: SCR +42: CSI0 +43: CSI1 +44: LCDCTRL0 +45: LCDCTRL1 +46: MP +47: DEFEBE0 +48: DEFEBE1 +49: PMU +50: SPI3 +51: TZASC +52: PATA +53: VE +54: SS +55: EMAC +56: SATA +57: GPS +58: HDMI +59: TVE +60: ACE +61: TVD +62: PS2_0 +63: PS2_1 +64: USB3 +65: USB4 +66: PLE_PFM +67: TIMER4 +68: TIMER5 +69: GPU_GP +70: GPU_GPMMU +71: GPU_PP0 +72: GPU_PPMMU0 +73: GPU_PMU +74: GPU_RSV0 +75: GPU_RSV1 +76: GPU_RSV2 +77: GPU_RSV3 +78: GPU_RSV4 +79: GPU_RSV5 +80: GPU_RSV6 +82: SYNC_TIMER0 +83: SYNC_TIMER1 + +Example: + +intc: interrupt-controller { + compatible = "allwinner,sunxi-ic"; + reg = <0x01c20400 0x400>; + interrupt-controller; + #interrupt-cells = <2>; +}; diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt new file mode 100644 index 000000000000..2d88816dd550 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/common.txt @@ -0,0 +1,23 @@ +Common leds properties. + +Optional properties for child nodes: +- label : The label for this LED. If omitted, the label is + taken from the node name (excluding the unit address). + +- linux,default-trigger : This parameter, if present, is a + string defining the trigger assigned to the LED. Current triggers are: + "backlight" - LED will act as a back-light, controlled by the framebuffer + system + "default-on" - LED will turn on (but for leds-gpio see "default-state" + property in Documentation/devicetree/bindings/gpio/led.txt) + "heartbeat" - LED "double" flashes at a load average based rate + "ide-disk" - LED indicates disk activity + "timer" - LED flashes at a fixed, configurable rate + +Examples: + +system-status { + label = "Status"; + linux,default-trigger = "heartbeat"; + ... +}; diff --git a/Documentation/devicetree/bindings/gpio/led.txt b/Documentation/devicetree/bindings/leds/leds-gpio.txt index edc83c1c0d54..df1b3080f6b8 100644 --- a/Documentation/devicetree/bindings/gpio/led.txt +++ b/Documentation/devicetree/bindings/leds/leds-gpio.txt @@ -10,16 +10,10 @@ LED sub-node properties: - gpios : Should specify the LED's GPIO, see "gpios property" in Documentation/devicetree/bindings/gpio/gpio.txt. Active low LEDs should be indicated using flags in the GPIO specifier. -- label : (optional) The label for this LED. If omitted, the label is - taken from the node name (excluding the unit address). -- linux,default-trigger : (optional) This parameter, if present, is a - string defining the trigger assigned to the LED. Current triggers are: - "backlight" - LED will act as a back-light, controlled by the framebuffer - system - "default-on" - LED will turn on, but see "default-state" below - "heartbeat" - LED "double" flashes at a load average based rate - "ide-disk" - LED indicates disk activity - "timer" - LED flashes at a fixed, configurable rate +- label : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- linux,default-trigger : (optional) + see Documentation/devicetree/bindings/leds/common.txt - default-state: (optional) The initial state of the LED. Valid values are "on", "off", and "keep". If the LED is already on or off and the default-state property is set the to same value, then no diff --git a/Documentation/devicetree/bindings/media/s5p-mfc.txt b/Documentation/devicetree/bindings/media/s5p-mfc.txt new file mode 100644 index 000000000000..67ec3d4ccc7f --- /dev/null +++ b/Documentation/devicetree/bindings/media/s5p-mfc.txt @@ -0,0 +1,23 @@ +* Samsung Multi Format Codec (MFC) + +Multi Format Codec (MFC) is the IP present in Samsung SoCs which +supports high resolution decoding and encoding functionalities. +The MFC device driver is a v4l2 driver which can encode/decode +video raw/elementary streams and has support for all popular +video codecs. + +Required properties: + - compatible : value should be either one among the following + (a) "samsung,mfc-v5" for MFC v5 present in Exynos4 SoCs + (b) "samsung,mfc-v6" for MFC v6 present in Exynos5 SoCs + + - reg : Physical base address of the IP registers and length of memory + mapped region. + + - interrupts : MFC interrupt number to the CPU. + + - samsung,mfc-r : Base address of the first memory bank used by MFC + for DMA contiguous memory allocation and its size. + + - samsung,mfc-l : Base address of the second memory bank used by MFC + for DMA contiguous memory allocation and its size. diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt new file mode 100644 index 000000000000..38e51ad2e07e --- /dev/null +++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt @@ -0,0 +1,15 @@ +* Atmel SSC driver. + +Required properties: +- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc" + - atmel,at91rm9200-ssc: support pdc transfer + - atmel,at91sam9g45-ssc: support dma transfer +- reg: Should contain SSC registers location and length +- interrupts: Should contain SSC interrupt + +Example: +ssc0: ssc@fffbc000 { + compatible = "atmel,at91rm9200-ssc"; + reg = <0xfffbc000 0x4000>; + interrupts = <14 4 5>; +}; diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 8e2e0ba2f486..a591c6741d75 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -21,6 +21,12 @@ Optional properties: - cd-inverted: when present, polarity on the cd gpio line is inverted - wp-inverted: when present, polarity on the wp gpio line is inverted - max-frequency: maximum operating clock frequency +- no-1-8-v: when present, denotes that 1.8v card voltage is not supported on + this system, even if the controller claims it is. + +Optional SDIO properties: +- keep-power-in-suspend: Preserves card power during a suspend/resume cycle +- enable-sdio-wakeup: Enables wake up of host system on SDIO IRQ assertion Example: @@ -33,4 +39,6 @@ sdhci@ab000000 { cd-inverted; wp-gpios = <&gpio 70 0>; max-frequency = <50000000>; + keep-power-in-suspend; + enable-sdio-wakeup; } diff --git a/Documentation/devicetree/bindings/mmc/samsung-sdhci.txt b/Documentation/devicetree/bindings/mmc/samsung-sdhci.txt index 630a7d7f4718..97e9e315400d 100644 --- a/Documentation/devicetree/bindings/mmc/samsung-sdhci.txt +++ b/Documentation/devicetree/bindings/mmc/samsung-sdhci.txt @@ -12,10 +12,6 @@ is used. The Samsung's SDHCI controller bindings extends this as listed below. [A] The property "samsung,cd-pinmux-gpio" can be used as stated in the "Optional Board Specific Properties" section below. -[B] If core card-detect bindings and "samsung,cd-pinmux-gpio" property - is not specified, it is assumed that there is no card detection - mechanism used. - Required SoC Specific Properties: - compatible: should be one of the following - "samsung,s3c6410-sdhci": For controllers compatible with s3c6410 sdhci @@ -24,14 +20,18 @@ Required SoC Specific Properties: controller. Required Board Specific Properties: -- gpios: Should specify the gpios used for clock, command and data lines. The - gpio specifier format depends on the gpio controller. +- Samsung GPIO variant (will be completely replaced by pinctrl): + - gpios: Should specify the gpios used for clock, command and data lines. The + gpio specifier format depends on the gpio controller. +- Pinctrl variant (preferred if available): + - pinctrl-0: Should specify pin control groups used for this controller. + - pinctrl-names: Should contain only one value - "default". Optional Board Specific Properties: - samsung,cd-pinmux-gpio: Specifies the card detect line that is routed through a pinmux to the card-detect pin of the card slot. This property should be used only if none of the mmc core card-detect properties are - used. + used. Only for Samsung GPIO variant. Example: sdhci@12530000 { @@ -40,12 +40,18 @@ Example: interrupts = <0 75 0>; bus-width = <4>; cd-gpios = <&gpk2 2 2 3 3>; + + /* Samsung GPIO variant */ gpios = <&gpk2 0 2 0 3>, /* clock line */ <&gpk2 1 2 0 3>, /* command line */ <&gpk2 3 2 3 3>, /* data line 0 */ <&gpk2 4 2 3 3>, /* data line 1 */ <&gpk2 5 2 3 3>, /* data line 2 */ <&gpk2 6 2 3 3>; /* data line 3 */ + + /* Pinctrl variant */ + pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4>; + pinctrl-names = "default"; }; Note: This example shows both SoC specific and board specific properties diff --git a/Documentation/devicetree/bindings/mmc/synposis-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt index 06cd32d08052..06cd32d08052 100644 --- a/Documentation/devicetree/bindings/mmc/synposis-dw-mshc.txt +++ b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt index be76a23b34c4..ed271fc255b2 100644 --- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt @@ -19,6 +19,7 @@ ti,dual-volt: boolean, supports dual voltage cards "supply-name" examples are "vmmc", "vmmc_aux" etc ti,non-removable: non-removable slot (like eMMC) ti,needs-special-reset: Requires a special softreset sequence +ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed Example: mmc1: mmc@0x4809c000 { diff --git a/Documentation/devicetree/bindings/mmc/vt8500-sdmmc.txt b/Documentation/devicetree/bindings/mmc/vt8500-sdmmc.txt new file mode 100644 index 000000000000..d7fb6abb3eb8 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/vt8500-sdmmc.txt @@ -0,0 +1,23 @@ +* Wondermedia WM8505/WM8650 SD/MMC Host Controller + +This file documents differences between the core properties described +by mmc.txt and the properties used by the wmt-sdmmc driver. + +Required properties: +- compatible: Should be "wm,wm8505-sdhc". +- interrupts: Two interrupts are required - regular irq and dma irq. + +Optional properties: +- sdon-inverted: SD_ON bit is inverted on the controller + +Examples: + +sdhc@d800a000 { + compatible = "wm,wm8505-sdhc"; + reg = <0xd800a000 0x1000>; + interrupts = <20 21>; + clocks = <&sdhc>; + bus-width = <4>; + sdon-inverted; +}; + diff --git a/Documentation/devicetree/bindings/net/can/grcan.txt b/Documentation/devicetree/bindings/net/can/grcan.txt new file mode 100644 index 000000000000..34ef3498f887 --- /dev/null +++ b/Documentation/devicetree/bindings/net/can/grcan.txt @@ -0,0 +1,28 @@ +Aeroflex Gaisler GRCAN and GRHCAN CAN controllers. + +The GRCAN and CRHCAN CAN controllers are available in the GRLIB VHDL IP core +library. + +Note: These properties are built from the AMBA plug&play in a Leon SPARC system +(the ordinary environment for GRCAN and GRHCAN). There are no dts files for +sparc. + +Required properties: + +- name : Should be "GAISLER_GRCAN", "01_03d", "GAISLER_GRHCAN" or "01_034" + +- reg : Address and length of the register set for the device + +- freq : Frequency of the external oscillator clock in Hz (the frequency of + the amba bus in the ordinary case) + +- interrupts : Interrupt number for this device + +Optional properties: + +- systemid : If not present or if the value of the least significant 16 bits + of this 32-bit property is smaller than GRCAN_TXBUG_SAFE_GRLIB_VERSION + a bug workaround is activated. + +For further information look in the documentation for the GLIB IP core library: +http://www.gaisler.com/products/grlib/grip.pdf diff --git a/Documentation/devicetree/bindings/net/cdns-emac.txt b/Documentation/devicetree/bindings/net/cdns-emac.txt new file mode 100644 index 000000000000..09055c2495f0 --- /dev/null +++ b/Documentation/devicetree/bindings/net/cdns-emac.txt @@ -0,0 +1,23 @@ +* Cadence EMAC Ethernet controller + +Required properties: +- compatible: Should be "cdns,[<chip>-]{emac}" + Use "cdns,at91rm9200-emac" Atmel at91rm9200 SoC. + or the generic form: "cdns,emac". +- reg: Address and length of the register set for the device +- interrupts: Should contain macb interrupt +- phy-mode: String, operation mode of the PHY interface. + Supported values are: "mii", "rmii". + +Optional properties: +- local-mac-address: 6 bytes, mac address + +Examples: + + macb0: ethernet@fffc4000 { + compatible = "cdns,at91rm9200-emac"; + reg = <0xfffc4000 0x4000>; + interrupts = <21>; + phy-mode = "rmii"; + local-mac-address = [3a 0e 03 04 05 06]; + }; diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt index dcaabe9fe869..6ddd0286a9b7 100644 --- a/Documentation/devicetree/bindings/net/cpsw.txt +++ b/Documentation/devicetree/bindings/net/cpsw.txt @@ -9,21 +9,15 @@ Required properties: number - interrupt-parent : The parent interrupt controller - cpdma_channels : Specifies number of channels in CPDMA -- host_port_no : Specifies host port shift -- cpdma_reg_ofs : Specifies CPDMA submodule register offset -- cpdma_sram_ofs : Specifies CPDMA SRAM offset -- ale_reg_ofs : Specifies ALE submodule register offset - ale_entries : Specifies No of entries ALE can hold -- host_port_reg_ofs : Specifies host port register offset -- hw_stats_reg_ofs : Specifies hardware statistics register offset -- bd_ram_ofs : Specifies internal desciptor RAM offset - bd_ram_size : Specifies internal descriptor RAM size - rx_descs : Specifies number of Rx descriptors - mac_control : Specifies Default MAC control register content for the specific platform - slaves : Specifies number for slaves -- slave_reg_ofs : Specifies slave register offset -- sliver_reg_ofs : Specifies slave sliver register offset +- cpts_active_slave : Specifies the slave to use for time stamping +- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds +- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds - phy_id : Specifies slave phy id - mac-address : Specifies slave MAC address @@ -45,30 +39,22 @@ Examples: interrupts = <55 0x4>; interrupt-parent = <&intc>; cpdma_channels = <8>; - host_port_no = <0>; - cpdma_reg_ofs = <0x800>; - cpdma_sram_ofs = <0xa00>; - ale_reg_ofs = <0xd00>; ale_entries = <1024>; - host_port_reg_ofs = <0x108>; - hw_stats_reg_ofs = <0x900>; - bd_ram_ofs = <0x2000>; bd_ram_size = <0x2000>; no_bd_ram = <0>; rx_descs = <64>; mac_control = <0x20>; slaves = <2>; + cpts_active_slave = <0>; + cpts_clock_mult = <0x80000000>; + cpts_clock_shift = <29>; cpsw_emac0: slave@0 { - slave_reg_ofs = <0x208>; - sliver_reg_ofs = <0xd80>; - phy_id = "davinci_mdio.16:00"; + phy_id = <&davinci_mdio>, <0>; /* Filled in by U-Boot */ mac-address = [ 00 00 00 00 00 00 ]; }; cpsw_emac1: slave@1 { - slave_reg_ofs = <0x308>; - sliver_reg_ofs = <0xdc0>; - phy_id = "davinci_mdio.16:01"; + phy_id = <&davinci_mdio>, <1>; /* Filled in by U-Boot */ mac-address = [ 00 00 00 00 00 00 ]; }; @@ -79,30 +65,22 @@ Examples: compatible = "ti,cpsw"; ti,hwmods = "cpgmac0"; cpdma_channels = <8>; - host_port_no = <0>; - cpdma_reg_ofs = <0x800>; - cpdma_sram_ofs = <0xa00>; - ale_reg_ofs = <0xd00>; ale_entries = <1024>; - host_port_reg_ofs = <0x108>; - hw_stats_reg_ofs = <0x900>; - bd_ram_ofs = <0x2000>; bd_ram_size = <0x2000>; no_bd_ram = <0>; rx_descs = <64>; mac_control = <0x20>; slaves = <2>; + cpts_active_slave = <0>; + cpts_clock_mult = <0x80000000>; + cpts_clock_shift = <29>; cpsw_emac0: slave@0 { - slave_reg_ofs = <0x208>; - sliver_reg_ofs = <0xd80>; - phy_id = "davinci_mdio.16:00"; + phy_id = <&davinci_mdio>, <0>; /* Filled in by U-Boot */ mac-address = [ 00 00 00 00 00 00 ]; }; cpsw_emac1: slave@1 { - slave_reg_ofs = <0x308>; - sliver_reg_ofs = <0xdc0>; - phy_id = "davinci_mdio.16:01"; + phy_id = <&davinci_mdio>, <1>; /* Filled in by U-Boot */ mac-address = [ 00 00 00 00 00 00 ]; }; diff --git a/Documentation/devicetree/bindings/net/mdio-gpio.txt b/Documentation/devicetree/bindings/net/mdio-gpio.txt index bc9549529014..c79bab025369 100644 --- a/Documentation/devicetree/bindings/net/mdio-gpio.txt +++ b/Documentation/devicetree/bindings/net/mdio-gpio.txt @@ -8,9 +8,16 @@ gpios property as described in section VIII.1 in the following order: MDC, MDIO. +Note: Each gpio-mdio bus should have an alias correctly numbered in "aliases" +node. + Example: -mdio { +aliases { + mdio-gpio0 = <&mdio0>; +}; + +mdio0: mdio { compatible = "virtual,mdio-gpio"; #address-cells = <1>; #size-cells = <0>; diff --git a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt new file mode 100644 index 000000000000..3a268127b054 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt @@ -0,0 +1,141 @@ +* Atmel AT91 Pinmux Controller + +The AT91 Pinmux Controler, enables the IC +to share one PAD to several functional blocks. The sharing is done by +multiplexing the PAD input/output signals. For each PAD there are up to +8 muxing options (called periph modes). Since different modules require +different PAD settings (like pull up, keeper, etc) the contoller controls +also the PAD settings parameters. + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the meaning of the +phrase "pin configuration node". + +Atmel AT91 pin configuration node is a node of a group of pins which can be +used for a specific device or function. This node represents both mux and config +of the pins in that group. The 'pins' selects the function mode(also named pin +mode) this pin can work on and the 'config' configures various pad settings +such as pull-up, multi drive, etc. + +Required properties for iomux controller: +- compatible: "atmel,at91rm9200-pinctrl" +- atmel,mux-mask: array of mask (periph per bank) to describe if a pin can be + configured in this periph mode. All the periph and bank need to be describe. + +How to create such array: + +Each column will represent the possible peripheral of the pinctrl +Each line will represent a pio bank + +Take an example on the 9260 +Peripheral: 2 ( A and B) +Bank: 3 (A, B and C) +=> + + /* A B */ + 0xffffffff 0xffc00c3b /* pioA */ + 0xffffffff 0x7fff3ccf /* pioB */ + 0xffffffff 0x007fffff /* pioC */ + +For each peripheral/bank we will descibe in a u32 if a pin can can be +configured in it by putting 1 to the pin bit (1 << pin) + +Let's take the pioA on peripheral B +From the datasheet Table 10-2. +Peripheral B +PA0 MCDB0 +PA1 MCCDB +PA2 +PA3 MCDB3 +PA4 MCDB2 +PA5 MCDB1 +PA6 +PA7 +PA8 +PA9 +PA10 ETX2 +PA11 ETX3 +PA12 +PA13 +PA14 +PA15 +PA16 +PA17 +PA18 +PA19 +PA20 +PA21 +PA22 ETXER +PA23 ETX2 +PA24 ETX3 +PA25 ERX2 +PA26 ERX3 +PA27 ERXCK +PA28 ECRS +PA29 ECOL +PA30 RXD4 +PA31 TXD4 + +=> 0xffc00c3b + +Required properties for pin configuration node: +- atmel,pins: 4 integers array, represents a group of pins mux and config + setting. The format is atmel,pins = <PIN_BANK PIN_BANK_NUM PERIPH CONFIG>. + The PERIPH 0 means gpio. + +Bits used for CONFIG: +PULL_UP (1 << 0): indicate this pin need a pull up. +MULTIDRIVE (1 << 1): indicate this pin need to be configured as multidrive. +DEGLITCH (1 << 2): indicate this pin need deglitch. +PULL_DOWN (1 << 3): indicate this pin need a pull down. +DIS_SCHMIT (1 << 4): indicate this pin need to disable schmit trigger. +DEBOUNCE (1 << 16): indicate this pin need debounce. +DEBOUNCE_VAL (0x3fff << 17): debounce val. + +NOTE: +Some requirements for using atmel,at91rm9200-pinctrl binding: +1. We have pin function node defined under at91 controller node to represent + what pinmux functions this SoC supports. +2. The driver can use the function node's name and pin configuration node's + name describe the pin function and group hierarchy. + For example, Linux at91 pinctrl driver takes the function node's name + as the function name and pin configuration node's name as group name to + create the map table. +3. Each pin configuration node should have a phandle, devices can set pins + configurations by referring to the phandle of that pin configuration node. +4. The gpio controller must be describe in the pinctrl simple-bus. + +Examples: + +pinctrl@fffff400 { + #address-cells = <1>; + #size-cells = <1>; + ranges; + compatible = "atmel,at91rm9200-pinctrl", "simple-bus"; + reg = <0xfffff400 0x600>; + + atmel,mux-mask = < + /* A B */ + 0xffffffff 0xffc00c3b /* pioA */ + 0xffffffff 0x7fff3ccf /* pioB */ + 0xffffffff 0x007fffff /* pioC */ + >; + + /* shared pinctrl settings */ + dbgu { + pinctrl_dbgu: dbgu-0 { + atmel,pins = + <1 14 0x1 0x0 /* PB14 periph A */ + 1 15 0x1 0x1>; /* PB15 periph with pullup */ + }; + }; +}; + +dbgu: serial@fffff200 { + compatible = "atmel,at91sam9260-usart"; + reg = <0xfffff200 0x200>; + interrupts = <1 4 7>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_dbgu>; + status = "disabled"; +}; diff --git a/Documentation/devicetree/bindings/pinctrl/marvell,kirkwood-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/marvell,kirkwood-pinctrl.txt index 361bccb7ec89..95daf6335c37 100644 --- a/Documentation/devicetree/bindings/pinctrl/marvell,kirkwood-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/marvell,kirkwood-pinctrl.txt @@ -7,8 +7,10 @@ Required properties: - compatible: "marvell,88f6180-pinctrl", "marvell,88f6190-pinctrl", "marvell,88f6192-pinctrl", "marvell,88f6281-pinctrl", "marvell,88f6282-pinctrl" + "marvell,98dx4122-pinctrl" This driver supports all kirkwood variants, i.e. 88f6180, 88f619x, and 88f628x. +It also support the 88f6281-based variant in the 98dx412x Bobcat SoCs. Available mpp pins/groups and functions: Note: brackets (x) are not part of the mpp name for marvell,function and given @@ -277,3 +279,40 @@ mpp46 46 gpio, ts(mp10), tdm(fs), lcd(hsync) mpp47 47 gpio, ts(mp11), tdm(drx), lcd(vsync) mpp48 48 gpio, ts(mp12), tdm(dtx), lcd(d16) mpp49 49 gpo, tdm(rx0ql), pex(clkreq), lcd(d17) + +* Marvell Bobcat 98dx4122 + +name pins functions +================================================================================ +mpp0 0 gpio, nand(io2), spi(cs) +mpp1 1 gpo, nand(io3), spi(mosi) +mpp2 2 gpo, nand(io4), spi(sck) +mpp3 3 gpo, nand(io5), spi(miso) +mpp4 4 gpio, nand(io6), uart0(rxd) +mpp5 5 gpo, nand(io7), uart0(txd) +mpp6 6 sysrst(out), spi(mosi) +mpp7 7 gpo, pex(rsto), spi(cs) +mpp8 8 gpio, twsi0(sda), uart0(rts), uart1(rts) +mpp9 9 gpio, twsi(sck), uart0(cts), uart1(cts) +mpp10 10 gpo, spi(sck), uart0(txd) +mpp11 11 gpio, spi(miso), uart0(rxd) +mpp13 13 gpio, uart1(txd) +mpp14 14 gpio, uart1(rxd) +mpp15 15 gpio, uart0(rts) +mpp16 16 gpio, uart0(cts) +mpp18 18 gpo, nand(io0) +mpp19 19 gpo, nand(io1) +mpp34 34 gpio +mpp35 35 gpio +mpp36 36 gpio +mpp37 37 gpio +mpp38 38 gpio +mpp39 39 gpio +mpp40 40 gpio +mpp41 41 gpio +mpp42 42 gpio +mpp43 43 gpio +mpp44 44 gpio +mpp45 45 gpio +mpp49 49 gpio + diff --git a/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt index 03dee50532f5..e97a27856b21 100644 --- a/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt @@ -8,13 +8,20 @@ on-chip controllers onto these pads. Required Properties: - compatible: should be one of the following. - "samsung,pinctrl-exynos4210": for Exynos4210 compatible pin-controller. + - "samsung,pinctrl-exynos4x12": for Exynos4x12 compatible pin-controller. - "samsung,pinctrl-exynos5250": for Exynos5250 compatible pin-controller. - reg: Base address of the pin controller hardware module and length of the address space it occupies. -- interrupts: interrupt specifier for the controller. The format and value of - the interrupt specifier depends on the interrupt parent for the controller. +- Pin banks as child nodes: Pin banks of the controller are represented by child + nodes of the controller node. Bank name is taken from name of the node. Each + bank node must contain following properties: + + - gpio-controller: identifies the node as a gpio controller and pin bank. + - #gpio-cells: number of cells in GPIO specifier. Since the generic GPIO + binding is used, the amount of cells must be specified as 2. See generic + GPIO binding documentation for description of particular cells. - Pin mux/config groups as child nodes: The pin mux (selecting pin function mode) and pin config (pull up/down, driver strength) settings are represented @@ -72,16 +79,24 @@ used as system wakeup events. A. External GPIO Interrupts: For supporting external gpio interrupts, the following properties should be specified in the pin-controller device node. -- interrupt-controller: identifies the controller node as interrupt-parent. -- #interrupt-cells: the value of this property should be 2. - - First Cell: represents the external gpio interrupt number local to the - external gpio interrupt space of the controller. - - Second Cell: flags to identify the type of the interrupt - - 1 = rising edge triggered - - 2 = falling edge triggered - - 3 = rising and falling edge triggered - - 4 = high level triggered - - 8 = low level triggered + - interrupt-parent: phandle of the interrupt parent to which the external + GPIO interrupts are forwarded to. + - interrupts: interrupt specifier for the controller. The format and value of + the interrupt specifier depends on the interrupt parent for the controller. + + In addition, following properties must be present in node of every bank + of pins supporting GPIO interrupts: + + - interrupt-controller: identifies the controller node as interrupt-parent. + - #interrupt-cells: the value of this property should be 2. + - First Cell: represents the external gpio interrupt number local to the + external gpio interrupt space of the controller. + - Second Cell: flags to identify the type of the interrupt + - 1 = rising edge triggered + - 2 = falling edge triggered + - 3 = rising and falling edge triggered + - 4 = high level triggered + - 8 = low level triggered B. External Wakeup Interrupts: For supporting external wakeup interrupts, a child node representing the external wakeup interrupt controller should be @@ -94,6 +109,11 @@ B. External Wakeup Interrupts: For supporting external wakeup interrupts, a found on Samsung Exynos4210 SoC. - interrupt-parent: phandle of the interrupt parent to which the external wakeup interrupts are forwarded to. + - interrupts: interrupt used by multiplexed wakeup interrupts. + + In addition, following properties must be present in node of every bank + of pins supporting wake-up interrupts: + - interrupt-controller: identifies the node as interrupt-parent. - #interrupt-cells: the value of this property should be 2 - First Cell: represents the external wakeup interrupt number local to @@ -105,11 +125,63 @@ B. External Wakeup Interrupts: For supporting external wakeup interrupts, a - 4 = high level triggered - 8 = low level triggered + Node of every bank of pins supporting direct wake-up interrupts (without + multiplexing) must contain following properties: + + - interrupt-parent: phandle of the interrupt parent to which the external + wakeup interrupts are forwarded to. + - interrupts: interrupts of the interrupt parent which are used for external + wakeup interrupts from pins of the bank, must contain interrupts for all + pins of the bank. + Aliases: All the pin controller nodes should be represented in the aliases node using the following format 'pinctrl{n}' where n is a unique number for the alias. +Example: A pin-controller node with pin banks: + + pinctrl_0: pinctrl@11400000 { + compatible = "samsung,pinctrl-exynos4210"; + reg = <0x11400000 0x1000>; + interrupts = <0 47 0>; + + /* ... */ + + /* Pin bank without external interrupts */ + gpy0: gpy0 { + gpio-controller; + #gpio-cells = <2>; + }; + + /* ... */ + + /* Pin bank with external GPIO or muxed wake-up interrupts */ + gpj0: gpj0 { + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + }; + + /* ... */ + + /* Pin bank with external direct wake-up interrupts */ + gpx0: gpx0 { + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + interrupt-parent = <&gic>; + interrupts = <0 16 0>, <0 17 0>, <0 18 0>, <0 19 0>, + <0 20 0>, <0 21 0>, <0 22 0>, <0 23 0>; + #interrupt-cells = <2>; + }; + + /* ... */ + }; + Example 1: A pin-controller node with pin groups. pinctrl_0: pinctrl@11400000 { @@ -117,6 +189,8 @@ Example 1: A pin-controller node with pin groups. reg = <0x11400000 0x1000>; interrupts = <0 47 0>; + /* ... */ + uart0_data: uart0-data { samsung,pins = "gpa0-0", "gpa0-1"; samsung,pin-function = <2>; @@ -158,20 +232,14 @@ Example 2: A pin-controller node with external wakeup interrupt controller node. pinctrl_1: pinctrl@11000000 { compatible = "samsung,pinctrl-exynos4210"; reg = <0x11000000 0x1000>; - interrupts = <0 46 0>; - interrupt-controller; - #interrupt-cells = <2>; + interrupts = <0 46 0> - wakup_eint: wakeup-interrupt-controller { + /* ... */ + + wakeup-interrupt-controller { compatible = "samsung,exynos4210-wakeup-eint"; interrupt-parent = <&gic>; - interrupt-controller; - #interrupt-cells = <2>; - interrupts = <0 16 0>, <0 17 0>, <0 18 0>, <0 19 0>, - <0 20 0>, <0 21 0>, <0 22 0>, <0 23 0>, - <0 24 0>, <0 25 0>, <0 26 0>, <0 27 0>, - <0 28 0>, <0 29 0>, <0 30 0>, <0 31 0>, - <0 32 0>; + interrupts = <0 32 0>; }; }; @@ -190,7 +258,8 @@ Example 4: Set up the default pin state for uart controller. static int s3c24xx_serial_probe(struct platform_device *pdev) { struct pinctrl *pinctrl; - ... - ... + + /* ... */ + pinctrl = devm_pinctrl_get_select_default(&pdev->dev); } diff --git a/Documentation/devicetree/bindings/rtc/nvidia,tegra20-rtc.txt b/Documentation/devicetree/bindings/rtc/nvidia,tegra20-rtc.txt new file mode 100644 index 000000000000..93f45e9dce7c --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/nvidia,tegra20-rtc.txt @@ -0,0 +1,19 @@ +NVIDIA Tegra20 real-time clock + +The Tegra RTC maintains seconds and milliseconds counters, and five alarm +registers. The alarms and other interrupts may wake the system from low-power +state. + +Required properties: + +- compatible : should be "nvidia,tegra20-rtc". +- reg : Specifies base physical address and size of the registers. +- interrupts : A single interrupt specifier. + +Example: + +timer { + compatible = "nvidia,tegra20-rtc"; + reg = <0x7000e000 0x100>; + interrupts = <0 2 0x04>; +}; diff --git a/Documentation/devicetree/bindings/rtc/orion-rtc.txt b/Documentation/devicetree/bindings/rtc/orion-rtc.txt new file mode 100644 index 000000000000..3bf63ffa5160 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/orion-rtc.txt @@ -0,0 +1,18 @@ +* Mvebu Real Time Clock + +RTC controller for the Kirkwood, the Dove, the Armada 370 and the +Armada XP SoCs + +Required properties: +- compatible : Should be "marvell,orion-rtc" +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: IRQ line for the RTC. + +Example: + +rtc@10300 { + compatible = "marvell,orion-rtc"; + reg = <0xd0010300 0x20>; + interrupts = <50>; +}; diff --git a/Documentation/devicetree/bindings/sound/ak4104.txt b/Documentation/devicetree/bindings/sound/ak4104.txt new file mode 100644 index 000000000000..b902ee39cf89 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/ak4104.txt @@ -0,0 +1,22 @@ +AK4104 S/PDIF transmitter + +This device supports SPI mode only. + +Required properties: + + - compatible : "asahi-kasei,ak4104" + + - reg : The chip select number on the SPI bus + +Optional properties: + + - reset-gpio : a GPIO spec for the reset pin. If specified, it will be + deasserted before communication to the device starts. + +Example: + +spdif: ak4104@0 { + compatible = "asahi-kasei,ak4104"; + reg = <0>; + spi-max-frequency = <5000000>; +}; diff --git a/Documentation/devicetree/bindings/sound/atmel-at91sam9g20ek-wm8731-audio.txt b/Documentation/devicetree/bindings/sound/atmel-at91sam9g20ek-wm8731-audio.txt new file mode 100644 index 000000000000..9c5a9947b64d --- /dev/null +++ b/Documentation/devicetree/bindings/sound/atmel-at91sam9g20ek-wm8731-audio.txt @@ -0,0 +1,26 @@ +* Atmel at91sam9g20ek wm8731 audio complex + +Required properties: + - compatible: "atmel,at91sam9g20ek-wm8731-audio" + - atmel,model: The user-visible name of this sound complex. + - atmel,audio-routing: A list of the connections between audio components. + - atmel,ssc-controller: The phandle of the SSC controller + - atmel,audio-codec: The phandle of the WM8731 audio codec +Optional properties: + - pinctrl-names, pinctrl-0: Please refer to pinctrl-bindings.txt + +Example: +sound { + compatible = "atmel,at91sam9g20ek-wm8731-audio"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_pck0_as_mck>; + + atmel,model = "wm8731 @ AT91SAMG20EK"; + + atmel,audio-routing = + "Ext Spk", "LHPOUT", + "Int MIC", "MICIN"; + + atmel,ssc-controller = <&ssc0>; + atmel,audio-codec = <&wm8731>; +}; diff --git a/Documentation/devicetree/bindings/sound/cs4271.txt b/Documentation/devicetree/bindings/sound/cs4271.txt index c81b5fd5a5bc..a850fb9c88ea 100644 --- a/Documentation/devicetree/bindings/sound/cs4271.txt +++ b/Documentation/devicetree/bindings/sound/cs4271.txt @@ -18,6 +18,8 @@ Optional properties: - reset-gpio: a GPIO spec to define which pin is connected to the chip's !RESET pin + - cirrus,amuteb-eq-bmutec: When given, the Codec's AMUTEB=BMUTEC flag + is enabled. Examples: diff --git a/Documentation/devicetree/bindings/sound/omap-abe-twl6040.txt b/Documentation/devicetree/bindings/sound/omap-abe-twl6040.txt index 65dec876cb2d..fd40c852d7c7 100644 --- a/Documentation/devicetree/bindings/sound/omap-abe-twl6040.txt +++ b/Documentation/devicetree/bindings/sound/omap-abe-twl6040.txt @@ -12,7 +12,7 @@ Required properties: Optional properties: - ti,dmic: phandle for the OMAP dmic node if the machine have it connected -- ti,jack_detection: Need to be set to <1> if the board capable to detect jack +- ti,jack_detection: Need to be present if the board capable to detect jack insertion, removal. Available audio endpoints for the audio-routing table: @@ -59,7 +59,7 @@ sound { compatible = "ti,abe-twl6040"; ti,model = "SDP4430"; - ti,jack-detection = <1>; + ti,jack-detection; ti,mclk-freq = <38400000>; ti,mcpdm = <&mcpdm>; diff --git a/Documentation/devicetree/bindings/thermal/db8500-thermal.txt b/Documentation/devicetree/bindings/thermal/db8500-thermal.txt new file mode 100644 index 000000000000..2e1c06fad81f --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/db8500-thermal.txt @@ -0,0 +1,44 @@ +* ST-Ericsson DB8500 Thermal + +** Thermal node properties: + +- compatible : "stericsson,db8500-thermal"; +- reg : address range of the thermal sensor registers; +- interrupts : interrupts generated from PRCMU; +- interrupt-names : "IRQ_HOTMON_LOW" and "IRQ_HOTMON_HIGH"; +- num-trips : number of total trip points, this is required, set it 0 if none, + if greater than 0, the following properties must be defined; +- tripN-temp : temperature of trip point N, should be in ascending order; +- tripN-type : type of trip point N, should be one of "active" "passive" "hot" + "critical"; +- tripN-cdev-num : number of the cooling devices which can be bound to trip + point N, this is required if trip point N is defined, set it 0 if none, + otherwise the following cooling device names must be defined; +- tripN-cdev-nameM : name of the No. M cooling device of trip point N; + +Usually the num-trips and tripN-*** are separated in board related dts files. + +Example: +thermal@801573c0 { + compatible = "stericsson,db8500-thermal"; + reg = <0x801573c0 0x40>; + interrupts = <21 0x4>, <22 0x4>; + interrupt-names = "IRQ_HOTMON_LOW", "IRQ_HOTMON_HIGH"; + + num-trips = <3>; + + trip0-temp = <75000>; + trip0-type = "active"; + trip0-cdev-num = <1>; + trip0-cdev-name0 = "thermal-cpufreq-0"; + + trip1-temp = <80000>; + trip1-type = "active"; + trip1-cdev-num = <2>; + trip1-cdev-name0 = "thermal-cpufreq-0"; + trip1-cdev-name1 = "thermal-fan"; + + trip2-temp = <85000>; + trip2-type = "critical"; + trip2-cdev-num = <0>; +} diff --git a/Documentation/devicetree/bindings/timer/allwinner,sunxi-timer.txt b/Documentation/devicetree/bindings/timer/allwinner,sunxi-timer.txt new file mode 100644 index 000000000000..0c7b64e95a61 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/allwinner,sunxi-timer.txt @@ -0,0 +1,17 @@ +Allwinner A1X SoCs Timer Controller + +Required properties: + +- compatible : should be "allwinner,sunxi-timer" +- reg : Specifies base physical address and size of the registers. +- interrupts : The interrupt of the first timer +- clocks: phandle to the source clock (usually a 24 MHz fixed clock) + +Example: + +timer { + compatible = "allwinner,sunxi-timer"; + reg = <0x01c20c00 0x400>; + interrupts = <22>; + clocks = <&osc>; +}; diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt b/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt new file mode 100644 index 000000000000..e019fdc38773 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt @@ -0,0 +1,21 @@ +NVIDIA Tegra20 timer + +The Tegra20 timer provides four 29-bit timer channels and a single 32-bit free +running counter. The first two channels may also trigger a watchdog reset. + +Required properties: + +- compatible : should be "nvidia,tegra20-timer". +- reg : Specifies base physical address and size of the registers. +- interrupts : A list of 4 interrupts; one per timer channel. + +Example: + +timer { + compatible = "nvidia,tegra20-timer"; + reg = <0x60005000 0x60>; + interrupts = <0 0 0x04 + 0 1 0x04 + 0 41 0x04 + 0 42 0x04>; +}; diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt b/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt new file mode 100644 index 000000000000..906109d4c593 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt @@ -0,0 +1,23 @@ +NVIDIA Tegra30 timer + +The Tegra30 timer provides ten 29-bit timer channels, a single 32-bit free +running counter, and 5 watchdog modules. The first two channels may also +trigger a legacy watchdog reset. + +Required properties: + +- compatible : should be "nvidia,tegra30-timer", "nvidia,tegra20-timer". +- reg : Specifies base physical address and size of the registers. +- interrupts : A list of 6 interrupts; one per each of timer channels 1 + through 5, and one for the shared interrupt for the remaining channels. + +timer { + compatible = "nvidia,tegra30-timer", "nvidia,tegra20-timer"; + reg = <0x60005000 0x400>; + interrupts = <0 0 0x04 + 0 1 0x04 + 0 41 0x04 + 0 42 0x04 + 0 121 0x04 + 0 122 0x04>; +}; diff --git a/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt b/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt index 2ee903fad25c..273a8d5b3300 100644 --- a/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt +++ b/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt @@ -6,11 +6,19 @@ Required properties: - reg : Address and length of the register set for the device - interrupts : Should contain the auart interrupt numbers +Optional properties: +- fsl,auart-dma-channel : The DMA channels, the first is for RX, the other + is for TX. If you add this property, it also means that you + will enable the DMA support for the auart. + Note: due to the hardware bug in imx23(see errata : 2836), + only the imx28 can enable the DMA support for the auart. + Example: auart0: serial@8006a000 { compatible = "fsl,imx28-auart", "fsl,imx23-auart"; reg = <0x8006a000 0x2000>; interrupts = <112 70 71>; + fsl,auart-dma-channel = <8 9>; }; Note: Each auart port should have an alias correctly numbered in "aliases" diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt index ba385f2e0ddc..1e1145ca4f3c 100644 --- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt @@ -14,7 +14,10 @@ Required properties: - "serial" if the port type is unknown. - reg : offset and length of the register set for the device. - interrupts : should contain uart interrupt. -- clock-frequency : the input clock frequency for the UART. +- clock-frequency : the input clock frequency for the UART + or + clocks phandle to refer to the clk used as per Documentation/devicetree + /bindings/clock/clock-bindings.txt Optional properties: - current-speed : the current active speed of the UART. diff --git a/Documentation/devicetree/bindings/usb/am33xx-usb.txt b/Documentation/devicetree/bindings/usb/am33xx-usb.txt index ca8fa56e9f03..ea840f7f9258 100644 --- a/Documentation/devicetree/bindings/usb/am33xx-usb.txt +++ b/Documentation/devicetree/bindings/usb/am33xx-usb.txt @@ -1,14 +1,35 @@ AM33XX MUSB GLUE - compatible : Should be "ti,musb-am33xx" + - reg : offset and length of register sets, first usbss, then for musb instances + - interrupts : usbss, musb instance interrupts in order - ti,hwmods : must be "usb_otg_hs" - multipoint : Should be "1" indicating the musb controller supports multipoint. This is a MUSB configuration-specific setting. - - num_eps : Specifies the number of endpoints. This is also a + - num-eps : Specifies the number of endpoints. This is also a MUSB configuration-specific setting. Should be set to "16" - - ram_bits : Specifies the ram address size. Should be set to "12" - - port0_mode : Should be "3" to represent OTG. "1" signifies HOST and "2" + - ram-bits : Specifies the ram address size. Should be set to "12" + - port0-mode : Should be "3" to represent OTG. "1" signifies HOST and "2" represents PERIPHERAL. - - port1_mode : Should be "1" to represent HOST. "3" signifies OTG and "2" + - port1-mode : Should be "1" to represent HOST. "3" signifies OTG and "2" represents PERIPHERAL. - power : Should be "250". This signifies the controller can supply upto 500mA when operating in host mode. + +Example: + +usb@47400000 { + compatible = "ti,musb-am33xx"; + reg = <0x47400000 0x1000 /* usbss */ + 0x47401000 0x800 /* musb instance 0 */ + 0x47401800 0x800>; /* musb instance 1 */ + interrupts = <17 /* usbss */ + 18 /* musb instance 0 */ + 19>; /* musb instance 1 */ + multipoint = <1>; + num-eps = <16>; + ram-bits = <12>; + port0-mode = <3>; + port1-mode = <3>; + power = <250>; + ti,hwmods = "usb_otg_hs"; +}; diff --git a/Documentation/devicetree/bindings/usb/ehci-orion.txt b/Documentation/devicetree/bindings/usb/ehci-orion.txt new file mode 100644 index 000000000000..6bc09ec14c4d --- /dev/null +++ b/Documentation/devicetree/bindings/usb/ehci-orion.txt @@ -0,0 +1,15 @@ +* EHCI controller, Orion Marvell variants + +Required properties: +- compatible: must be "marvell,orion-ehci" +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: The EHCI interrupt + +Example: + + ehci@50000 { + compatible = "marvell,orion-ehci"; + reg = <0x50000 0x1000>; + interrupts = <19>; + }; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 9de2b9ff9d6e..902b1b1f568e 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -5,6 +5,7 @@ using them to avoid name-space collisions. ad Avionic Design GmbH adi Analog Devices, Inc. +ak Asahi Kasei Corp. amcc Applied Micro Circuits Corporation (APM, formally AMCC) apm Applied Micro Circuits Corporation (APM) arm ARM Ltd. @@ -25,6 +26,7 @@ gef GE Fanuc Intelligent Platforms Embedded Systems, Inc. hp Hewlett Packard ibm International Business Machines (IBM) idt Integrated Device Technologies, Inc. +img Imagination Technologies Ltd. intercontrol Inter Control Group linux Linux-specific binding marvell Marvell Technology Group Ltd. @@ -34,8 +36,9 @@ national National Semiconductor nintendo Nintendo nvidia NVIDIA nxp NXP Semiconductors +onnn ON Semiconductor Corp. picochip Picochip Ltd -powervr Imagination Technologies +powervr PowerVR (deprecated, use img) qcom Qualcomm, Inc. ramtron Ramtron International realtek Realtek Semiconductor Corp. @@ -45,10 +48,12 @@ schindler Schindler sil Silicon Image simtek sirf SiRF Technology, Inc. +snps Synopsys, Inc. st STMicroelectronics stericsson ST-Ericsson ti Texas Instruments via VIA Technologies, Inc. wlf Wolfson Microelectronics wm Wondermedia Technologies, Inc. +winbond Winbond Electronics corp. xlnx Xilinx diff --git a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt new file mode 100644 index 000000000000..2957ebb5aa71 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt @@ -0,0 +1,15 @@ +* Atmel Watchdog Timers + +** at91sam9-wdt + +Required properties: +- compatible: must be "atmel,at91sam9260-wdt". +- reg: physical base address of the controller and length of memory mapped + region. + +Example: + + watchdog@fffffd40 { + compatible = "atmel,at91sam9260-wdt"; + reg = <0xfffffd40 0x10>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt b/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt new file mode 100644 index 000000000000..d209366b4a69 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt @@ -0,0 +1,13 @@ +BCM2835 Watchdog timer + +Required properties: + +- compatible : should be "brcm,bcm2835-pm-wdt" +- reg : Specifies base physical address and size of the registers. + +Example: + +watchdog { + compatible = "brcm,bcm2835-pm-wdt"; + reg = <0x7e100000 0x28>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt new file mode 100644 index 000000000000..0b2717775600 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt @@ -0,0 +1,13 @@ +Allwinner sunXi Watchdog timer + +Required properties: + +- compatible : should be "allwinner,sunxi-wdt" +- reg : Specifies base physical address and size of the registers. + +Example: + +wdt: watchdog@01c20c90 { + compatible = "allwinner,sunxi-wdt"; + reg = <0x01c20c90 0x10>; +}; diff --git a/Documentation/devicetree/usage-model.txt b/Documentation/devicetree/usage-model.txt index dca90fe22a90..ef9d06c9f8fd 100644 --- a/Documentation/devicetree/usage-model.txt +++ b/Documentation/devicetree/usage-model.txt @@ -347,7 +347,7 @@ later), which will happily live at the base of the Linux /sys/devices tree. Therefore, if a DT node is at the root of the tree, then it really probably is best registered as a platform_device. -Linux board support code calls of_platform_populate(NULL, NULL, NULL) +Linux board support code calls of_platform_populate(NULL, NULL, NULL, NULL) to kick off discovery of devices at the root of the tree. The parameters are all NULL because when starting from the root of the tree, there is no need to provide a starting node (the first NULL), a diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt index ad86fb86c9a0..0188903bc9e1 100644 --- a/Documentation/dma-buf-sharing.txt +++ b/Documentation/dma-buf-sharing.txt @@ -376,7 +376,7 @@ Being able to mmap an export dma-buf buffer object has 2 main use-cases: leaving the cpu domain and flushing caches at fault time. Note that all the dma_buf files share the same anon inode, hence the exporter needs to replace the dma_buf file stored in vma->vm_file with it's own if pte shootdown is - requred. This is because the kernel uses the underlying inode's address_space + required. This is because the kernel uses the underlying inode's address_space for vma tracking (and hence pte tracking at shootdown time with unmap_mapping_range). @@ -388,7 +388,7 @@ Being able to mmap an export dma-buf buffer object has 2 main use-cases: Exporters that shoot down mappings (for any reasons) shall not do any synchronization at fault time with outstanding device operations. Synchronization is an orthogonal issue to sharing the backing storage of a - buffer and hence should not be handled by dma-buf itself. This is explictly + buffer and hence should not be handled by dma-buf itself. This is explicitly mentioned here because many people seem to want something like this, but if different exporters handle this differently, buffer sharing can fail in interesting ways depending upong the exporter (if userspace starts depending diff --git a/Documentation/dontdiff b/Documentation/dontdiff index 74c25c8d8884..b89a739a3276 100644 --- a/Documentation/dontdiff +++ b/Documentation/dontdiff @@ -181,7 +181,6 @@ modversions.h* nconf ncscope.* offset.h -offsets.h oui.c* page-types parse.c diff --git a/Documentation/fault-injection/notifier-error-inject.txt b/Documentation/fault-injection/notifier-error-inject.txt index c83526c364e5..09adabef513f 100644 --- a/Documentation/fault-injection/notifier-error-inject.txt +++ b/Documentation/fault-injection/notifier-error-inject.txt @@ -1,7 +1,7 @@ Notifier error injection ======================== -Notifier error injection provides the ability to inject artifical errors to +Notifier error injection provides the ability to inject artificial errors to specified notifier chain callbacks. It is useful to test the error handling of notifier call chain failures which is rarely executed. There are kernel modules that can be used to test the following notifiers. @@ -14,7 +14,7 @@ modules that can be used to test the following notifiers. CPU notifier error injection module ----------------------------------- This feature can be used to test the error handling of the CPU notifiers by -injecting artifical errors to CPU notifier chain callbacks. +injecting artificial errors to CPU notifier chain callbacks. If the notifier call chain should be failed with some events notified, write the error code to debugfs interface diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index a1793d670cd0..3844d21d6ca3 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -33,7 +33,7 @@ Table of Contents 2 Modifying System Parameters 3 Per-Process Parameters - 3.1 /proc/<pid>/oom_score_adj - Adjust the oom-killer + 3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj - Adjust the oom-killer score 3.2 /proc/<pid>/oom_score - Display current oom-killer score 3.3 /proc/<pid>/io - Display the IO accounting fields @@ -1320,10 +1320,10 @@ of the kernel. CHAPTER 3: PER-PROCESS PARAMETERS ------------------------------------------------------------------------------ -3.1 /proc/<pid>/oom_score_adj- Adjust the oom-killer score +3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj- Adjust the oom-killer score -------------------------------------------------------------------------------- -This file can be used to adjust the badness heuristic used to select which +These file can be used to adjust the badness heuristic used to select which process gets killed in out of memory conditions. The badness heuristic assigns a value to each candidate task ranging from 0 @@ -1361,6 +1361,12 @@ same system, cpuset, mempolicy, or memory controller resources to use at least equivalent to discounting 50% of the task's allowed memory from being considered as scoring against the task. +For backwards compatibility with previous kernels, /proc/<pid>/oom_adj may also +be used to tune the badness score. Its acceptable values range from -16 +(OOM_ADJUST_MIN) to +15 (OOM_ADJUST_MAX) and a special value of -17 +(OOM_DISABLE) to disable oom killing entirely for that task. Its value is +scaled linearly with /proc/<pid>/oom_score_adj. + The value of /proc/<pid>/oom_score_adj may be reduced no lower than the last value set by a CAP_SYS_RESOURCE process. To reduce the value any lower requires CAP_SYS_RESOURCE. @@ -1375,7 +1381,9 @@ minimal amount of work. ------------------------------------------------------------- This file can be used to check the current score used by the oom-killer is for -any given <pid>. +any given <pid>. Use it together with /proc/<pid>/oom_score_adj to tune which +process should be killed in an out-of-memory situation. + 3.3 /proc/<pid>/io - Display the IO accounting fields ------------------------------------------------------- diff --git a/Documentation/filesystems/xfs.txt b/Documentation/filesystems/xfs.txt index 3fc0c31a6f5d..3e4b3dd1e046 100644 --- a/Documentation/filesystems/xfs.txt +++ b/Documentation/filesystems/xfs.txt @@ -43,7 +43,7 @@ When mounting an XFS filesystem, the following options are accepted. 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. This option is incompatible with the nodelaylog option. + impact. dmapi Enable the DMAPI (Data Management API) event callouts. @@ -72,8 +72,15 @@ When mounting an XFS filesystem, the following options are accepted. 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 - provided for backwards compatibility, but causes problems for - backup applications that cannot handle large inode numbers. + the default allocation option. Applications which do not handle + inode numbers bigger than 32 bits, should use inode32 option. + + 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. largeio/nolargeio If "nolargeio" is specified, the optimal I/O reported in diff --git a/Documentation/firmware_class/README b/Documentation/firmware_class/README index 815b711bcd85..43fada989e65 100644 --- a/Documentation/firmware_class/README +++ b/Documentation/firmware_class/README @@ -22,12 +22,17 @@ - calls request_firmware(&fw_entry, $FIRMWARE, device) - kernel searchs the fimware image with name $FIRMWARE directly in the below search path of root filesystem: + User customized search path by module parameter 'path'[1] "/lib/firmware/updates/" UTS_RELEASE, "/lib/firmware/updates", "/lib/firmware/" UTS_RELEASE, "/lib/firmware" - If found, goto 7), else goto 2) + [1], the 'path' is a string parameter which length should be less + than 256, user should pass 'firmware_class.path=$CUSTOMIZED_PATH' + if firmware_class is built in kernel(the general situation) + 2), userspace: - /sys/class/firmware/xxx/{loading,data} appear. - hotplug gets called with a firmware identifier in $FIRMWARE @@ -114,3 +119,10 @@ on the setup, so I think that the choice on what firmware to make persistent should be left to userspace. + about firmware cache: + -------------------- + After firmware cache mechanism is introduced during system sleep, + request_firmware can be called safely inside device's suspend and + resume callback, and callers need't cache the firmware by + themselves any more for dealing with firmware loss during system + resume. diff --git a/Documentation/gpio.txt b/Documentation/gpio.txt index e08a883de36e..77a1d11af723 100644 --- a/Documentation/gpio.txt +++ b/Documentation/gpio.txt @@ -439,6 +439,48 @@ slower clock delays the rising edge of SCK, and the I2C master adjusts its signaling rate accordingly. +GPIO controllers and the pinctrl subsystem +------------------------------------------ + +A GPIO controller on a SOC might be tightly coupled with the pinctrl +subsystem, in the sense that the pins can be used by other functions +together with an optional gpio feature. We have already covered the +case where e.g. a GPIO controller need to reserve a pin or set the +direction of a pin by calling any of: + +pinctrl_request_gpio() +pinctrl_free_gpio() +pinctrl_gpio_direction_input() +pinctrl_gpio_direction_output() + +But how does the pin control subsystem cross-correlate the GPIO +numbers (which are a global business) to a certain pin on a certain +pin controller? + +This is done by registering "ranges" of pins, which are essentially +cross-reference tables. These are described in +Documentation/pinctrl.txt + +While the pin allocation is totally managed by the pinctrl subsystem, +gpio (under gpiolib) is still maintained by gpio drivers. It may happen +that different pin ranges in a SoC is managed by different gpio drivers. + +This makes it logical to let gpio drivers announce their pin ranges to +the pin ctrl subsystem before it will call 'pinctrl_request_gpio' in order +to request the corresponding pin to be prepared by the pinctrl subsystem +before any gpio usage. + +For this, the gpio controller can register its pin range with pinctrl +subsystem. There are two ways of doing it currently: with or without DT. + +For with DT support refer to Documentation/devicetree/bindings/gpio/gpio.txt. + +For non-DT support, user can call gpiochip_add_pin_range() with appropriate +parameters to register a range of gpio pins with a pinctrl driver. For this +exact name string of pinctrl device has to be passed as one of the +argument to this routine. + + What do these conventions omit? =============================== One of the biggest things these conventions omit is pin multiplexing, since diff --git a/Documentation/hid/uhid.txt b/Documentation/hid/uhid.txt index 4627c4241ece..3c741214dfbb 100644 --- a/Documentation/hid/uhid.txt +++ b/Documentation/hid/uhid.txt @@ -108,7 +108,7 @@ the request was handled successfully. UHID_FEATURE_ANSWER: If you receive a UHID_FEATURE request you must answer with this request. You must copy the "id" field from the request into the answer. Set the "err" field - to 0 if no error occured or to EIO if an I/O error occurred. + to 0 if no error occurred or to EIO if an I/O error occurred. If "err" is 0 then you should fill the buffer of the answer with the results of the feature request and set "size" correspondingly. diff --git a/Documentation/hwmon/ads7828 b/Documentation/hwmon/ads7828 index 2bbebe6f771f..f6e263e0f607 100644 --- a/Documentation/hwmon/ads7828 +++ b/Documentation/hwmon/ads7828 @@ -4,29 +4,47 @@ Kernel driver ads7828 Supported chips: * Texas Instruments/Burr-Brown ADS7828 Prefix: 'ads7828' - Addresses scanned: I2C 0x48, 0x49, 0x4a, 0x4b - Datasheet: Publicly available at the Texas Instruments website : + Datasheet: Publicly available at the Texas Instruments website: http://focus.ti.com/lit/ds/symlink/ads7828.pdf + * Texas Instruments ADS7830 + Prefix: 'ads7830' + Datasheet: Publicly available at the Texas Instruments website: + http://focus.ti.com/lit/ds/symlink/ads7830.pdf + Authors: Steve Hardy <shardy@redhat.com> + Vivien Didelot <vivien.didelot@savoirfairelinux.com> + Guillaume Roguez <guillaume.roguez@savoirfairelinux.com> + +Platform data +------------- + +The ads7828 driver accepts an optional ads7828_platform_data structure (defined +in include/linux/platform_data/ads7828.h). The structure fields are: -Module Parameters ------------------ +* diff_input: (bool) Differential operation + set to true for differential mode, false for default single ended mode. -* se_input: bool (default Y) - Single ended operation - set to N for differential mode -* int_vref: bool (default Y) - Operate with the internal 2.5V reference - set to N for external reference -* vref_mv: int (default 2500) - If using an external reference, set this to the reference voltage in mV +* ext_vref: (bool) External reference + set to true if it operates with an external reference, false for default + internal reference. + +* vref_mv: (unsigned int) Voltage reference + if using an external reference, set this to the reference voltage in mV, + otherwise it will default to the internal value (2500mV). This value will be + bounded with limits accepted by the chip, described in the datasheet. + + If no structure is provided, the configuration defaults to single ended + operation and internal voltage reference (2.5V). Description ----------- -This driver implements support for the Texas Instruments ADS7828. +This driver implements support for the Texas Instruments ADS7828 and ADS7830. -This device is a 12-bit 8-channel A-D converter. +The ADS7828 device is a 12-bit 8-channel A/D converter, while the ADS7830 does +8-bit sampling. It can operate in single ended mode (8 +ve inputs) or in differential mode, where 4 differential pairs can be measured. @@ -34,3 +52,7 @@ where 4 differential pairs can be measured. The chip also has the facility to use an external voltage reference. This may be required if your hardware supplies the ADS7828 from a 5V supply, see the datasheet for more details. + +There is no reliable way to identify this chip, so the driver will not scan +some addresses to try to auto-detect it. That means that you will have to +statically declare the device in the platform support code. diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp index f17256f069ba..3374c085678d 100644 --- a/Documentation/hwmon/coretemp +++ b/Documentation/hwmon/coretemp @@ -98,8 +98,10 @@ Process Processor TjMax(C) 45nm Atom Processors D525/510/425/410 100 + Z670/650 90 Z560/550/540/530P/530/520PT/520/515/510PT/510P 90 Z510/500 90 + N570/550 100 N475/470/455/450 100 N280/270 90 330/230 125 diff --git a/Documentation/hwmon/da9055 b/Documentation/hwmon/da9055 new file mode 100644 index 000000000000..855c3f536e00 --- /dev/null +++ b/Documentation/hwmon/da9055 @@ -0,0 +1,47 @@ +Supported chips: + * Dialog Semiconductors DA9055 PMIC + Prefix: 'da9055' + Datasheet: Datasheet is not publicly available. + +Authors: David Dajun Chen <dchen@diasemi.com> + +Description +----------- + +The DA9055 provides an Analogue to Digital Converter (ADC) with 10 bits +resolution and track and hold circuitry combined with an analogue input +multiplexer. The analogue input multiplexer will allow conversion of up to 5 +different inputs. The track and hold circuit ensures stable input voltages at +the input of the ADC during the conversion. + +The ADC is used to measure the following inputs: +Channel 0: VDDOUT - measurement of the system voltage +Channel 1: ADC_IN1 - high impedance input (0 - 2.5V) +Channel 2: ADC_IN2 - high impedance input (0 - 2.5V) +Channel 3: ADC_IN3 - high impedance input (0 - 2.5V) +Channel 4: Internal Tjunc. - sense (internal temp. sensor) + +By using sysfs attributes we can measure the system voltage VDDOUT, +chip junction temperature and auxiliary channels voltages. + +Voltage Monitoring +------------------ + +Voltages are sampled in a AUTO mode it can be manually sampled too and results +are stored in a 10 bit ADC. + +The system voltage is calculated as: + Milli volt = ((ADC value * 1000) / 85) + 2500 + +The voltages on ADC channels 1, 2 and 3 are calculated as: + Milli volt = (ADC value * 1000) / 102 + +Temperature Monitoring +---------------------- + +Temperatures are sampled by a 10 bit ADC. Junction temperatures +are monitored by the ADC channels. + +The junction temperature is calculated: + Degrees celsius = -0.4084 * (ADC_RES - T_OFFSET) + 307.6332 +The junction temperature attribute is supported by the driver. diff --git a/Documentation/hwmon/pmbus b/Documentation/hwmon/pmbus index f90f99920cc5..3d3a0f97f966 100644 --- a/Documentation/hwmon/pmbus +++ b/Documentation/hwmon/pmbus @@ -138,7 +138,7 @@ Sysfs entries When probing the chip, the driver identifies which PMBus registers are supported, and determines available sensors from this information. -Attribute files only exist if respective sensors are suported by the chip. +Attribute files only exist if respective sensors are supported by the chip. Labels are provided to inform the user about the sensor associated with a given sysfs entry. diff --git a/Documentation/hwmon/vexpress b/Documentation/hwmon/vexpress new file mode 100644 index 000000000000..557d6d5ad90d --- /dev/null +++ b/Documentation/hwmon/vexpress @@ -0,0 +1,34 @@ +Kernel driver vexpress +====================== + +Supported systems: + * ARM Ltd. Versatile Express platform + Prefix: 'vexpress' + Datasheets: + * "Hardware Description" sections of the Technical Reference Manuals + for the Versatile Express boards: + http://infocenter.arm.com/help/topic/com.arm.doc.subset.boards.express/index.html + * Section "4.4.14. System Configuration registers" of the V2M-P1 TRM: + http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0447-/index.html + +Author: Pawel Moll + +Description +----------- + +Versatile Express platform (http://www.arm.com/versatileexpress/) is a +reference & prototyping system for ARM Ltd. processors. It can be set up +from a wide range of boards, each of them containing (apart of the main +chip/FPGA) a number of microcontrollers responsible for platform +configuration and control. Theses microcontrollers can also monitor the +board and its environment by a number of internal and external sensors, +providing information about power lines voltages and currents, board +temperature and power usage. Some of them also calculate consumed energy +and provide a cumulative use counter. + +The configuration devices are _not_ memory mapped and must be accessed +via a custom interface, abstracted by the "vexpress_config" API. + +As these devices are non-discoverable, they must be described in a Device +Tree passed to the kernel. Details of the DT binding for them can be found +in Documentation/devicetree/bindings/hwmon/vexpress.txt. diff --git a/Documentation/input/alps.txt b/Documentation/input/alps.txt index ae8ba9a74ce1..3262b6e4d686 100644 --- a/Documentation/input/alps.txt +++ b/Documentation/input/alps.txt @@ -133,7 +133,7 @@ number of contacts (f1 and f0 in the table below). This packet only appears after a position packet with the mt bit set, and usually only appears when there are two or more contacts (although -occassionally it's seen with only a single contact). +occasionally it's seen with only a single contact). The final v3 packet type is the trackstick packet. diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index ec9ae6708691..14c3f4f1b617 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -1175,15 +1175,16 @@ When kbuild executes, the following steps are followed (roughly): in an init section in the image. Platform code *must* copy the blob to non-init memory prior to calling unflatten_device_tree(). - Example: - #arch/x86/platform/ce4100/Makefile - clean-files := *dtb.S + To use this command, simply add *.dtb into obj-y or targets, or make + some other target depend on %.dtb - DTC_FLAGS := -p 1024 - obj-y += foo.dtb.o + A central rule exists to create $(obj)/%.dtb from $(src)/%.dts; + architecture Makefiles do no need to explicitly write out that rule. - $(obj)/%.dtb: $(src)/%.dts - $(call cmd,dtc) + Example: + targets += $(dtb-y) + clean-files += *.dtb + DTC_FLAGS ?= -p 1024 --- 6.8 Custom kbuild commands diff --git a/Documentation/kbuild/modules.txt b/Documentation/kbuild/modules.txt index 3fb39e0116b4..69372fb98cf8 100644 --- a/Documentation/kbuild/modules.txt +++ b/Documentation/kbuild/modules.txt @@ -470,7 +470,7 @@ build. Sometimes, an external module uses exported symbols from another external module. kbuild needs to have full knowledge of - all symbols to avoid spitting out warnings about undefined + all symbols to avoid spliitting out warnings about undefined symbols. Three solutions exist for this situation. NOTE: The method with a top-level kbuild file is recommended diff --git a/Documentation/kernel-doc-nano-HOWTO.txt b/Documentation/kernel-doc-nano-HOWTO.txt index 3d8a97747f77..99b57abddf8a 100644 --- a/Documentation/kernel-doc-nano-HOWTO.txt +++ b/Documentation/kernel-doc-nano-HOWTO.txt @@ -64,6 +64,8 @@ Example kernel-doc function comment: * comment lines. * * The longer description can have multiple paragraphs. + * + * Return: Describe the return value of foobar. */ The short description following the subject can span multiple lines @@ -78,6 +80,8 @@ If a function parameter is "..." (varargs), it should be listed in kernel-doc notation as: * @...: description +The return value, if any, should be described in a dedicated section +named "Return". Example kernel-doc data structure comment. @@ -222,6 +226,9 @@ only a "*"). "section header:" names must be unique per function (or struct, union, typedef, enum). +Use the section header "Return" for sections describing the return value +of a function. + Avoid putting a spurious blank line after the function name, or else the description will be repeated! @@ -237,21 +244,21 @@ patterns, which are highlighted appropriately. NOTE 1: The multi-line descriptive text you provide does *not* recognize line breaks, so if you try to format some text nicely, as in: - Return codes + Return: 0 - cool 1 - invalid arg 2 - out of memory this will all run together and produce: - Return codes 0 - cool 1 - invalid arg 2 - out of memory + Return: 0 - cool 1 - invalid arg 2 - out of memory NOTE 2: If the descriptive text you provide has lines that begin with some phrase followed by a colon, each of those phrases will be taken as a new section heading, which means you should similarly try to avoid text like: - Return codes: + Return: 0: cool 1: invalid arg 2: out of memory diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 9776f068306b..20e248cc03a9 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -905,6 +905,24 @@ bytes respectively. Such letter suffixes can also be entirely omitted. gpt [EFI] Forces disk with valid GPT signature but invalid Protective MBR to be treated as GPT. + grcan.enable0= [HW] Configuration of physical interface 0. Determines + the "Enable 0" bit of the configuration register. + Format: 0 | 1 + Default: 0 + grcan.enable1= [HW] Configuration of physical interface 1. Determines + the "Enable 0" bit of the configuration register. + Format: 0 | 1 + Default: 0 + grcan.select= [HW] Select which physical interface to use. + Format: 0 | 1 + Default: 0 + grcan.txsize= [HW] Sets the size of the tx buffer. + Format: <unsigned int> such that (txsize & ~0x1fffc0) == 0. + Default: 1024 + grcan.rxsize= [HW] Sets the size of the rx buffer. + Format: <unsigned int> such that (rxsize & ~0x1fffc0) == 0. + Default: 1024 + hashdist= [KNL,NUMA] Large hashes allocated during boot are distributed across NUMA nodes. Defaults on for 64-bit NUMA, off otherwise. @@ -1304,6 +1322,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. lapic [X86-32,APIC] Enable the local APIC even if BIOS disabled it. + lapic= [x86,APIC] "notscdeadline" Do not use TSC deadline + value for LAPIC timer one-shot implementation. Default + back to the programmable timer unit in the LAPIC. + lapic_timer_c2_ok [X86,APIC] trust the local apic timer in C2 power state. @@ -1984,6 +2006,20 @@ bytes respectively. Such letter suffixes can also be entirely omitted. nox2apic [X86-64,APIC] Do not enable x2APIC mode. + cpu0_hotplug [X86] Turn on CPU0 hotplug feature when + CONFIG_BOOTPARAM_HOTPLUG_CPU0 is off. + Some features depend on CPU0. Known dependencies are: + 1. Resume from suspend/hibernate depends on CPU0. + Suspend/hibernate will fail if CPU0 is offline and you + need to online CPU0 before suspend/hibernate. + 2. PIC interrupts also depend on CPU0. CPU0 can't be + removed if a PIC interrupt is detected. + It's said poweroff/reboot may depend on CPU0 on some + machines although I haven't seen such issues so far + after CPU0 is offline on a few tested machines. + If the dependencies are under your control, you can + turn on cpu0_hotplug. + nptcg= [IA-64] Override max number of concurrent global TLB purges which is reported from either PAL_VM_SUMMARY or SAL PALO. @@ -2394,6 +2430,27 @@ bytes respectively. Such letter suffixes can also be entirely omitted. ramdisk_size= [RAM] Sizes of RAM disks in kilobytes See Documentation/blockdev/ramdisk.txt. + rcu_nocbs= [KNL,BOOT] + In kernels built with CONFIG_RCU_NOCB_CPU=y, set + the specified list of CPUs to be no-callback CPUs. + Invocation of these CPUs' RCU callbacks will + be offloaded to "rcuoN" kthreads created for + that purpose. This reduces OS jitter on the + offloaded CPUs, which can be useful for HPC and + real-time workloads. It can also improve energy + efficiency for asymmetric multiprocessors. + + rcu_nocbs_poll [KNL,BOOT] + Rather than requiring that offloaded CPUs + (specified by rcu_nocbs= above) explicitly + awaken the corresponding "rcuoN" kthreads, + make these kthreads poll for callbacks. + This improves the real-time response for the + offloaded CPUs by relieving them of the need to + wake up the corresponding kthread, but degrades + energy efficiency by requiring that the kthreads + periodically wake up to do the polling. + rcutree.blimit= [KNL,BOOT] Set maximum number of finished RCU callbacks to process in one batch. @@ -2859,6 +2916,22 @@ bytes respectively. Such letter suffixes can also be entirely omitted. to facilitate early boot debugging. See also Documentation/trace/events.txt + trace_options=[option-list] + [FTRACE] Enable or disable tracer options at boot. + The option-list is a comma delimited list of options + that can be enabled or disabled just as if you were + to echo the option name into + + /sys/kernel/debug/tracing/trace_options + + For example, to enable stacktrace option (to dump the + stack trace of each event), add to the command line: + + trace_options=stacktrace + + See also Documentation/trace/ftrace.txt "trace options" + section. + transparent_hugepage= [KNL] Format: [always|madvise|never] diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt index 2759f7c188f0..3c4e1b3b80a1 100644 --- a/Documentation/memory-barriers.txt +++ b/Documentation/memory-barriers.txt @@ -251,12 +251,13 @@ And there are a number of things that _must_ or _must_not_ be assumed: And for: - *A = X; Y = *A; + *A = X; *(A + 4) = Y; - we may get either of: + we may get any of: - STORE *A = X; Y = LOAD *A; - STORE *A = Y = X; + STORE *A = X; STORE *(A + 4) = Y; + STORE *(A + 4) = Y; STORE *A = X; + STORE {*A, *(A + 4) } = {X, Y}; ========================= diff --git a/Documentation/memory-hotplug.txt b/Documentation/memory-hotplug.txt index 6d0c2519cf47..c6f993d491b5 100644 --- a/Documentation/memory-hotplug.txt +++ b/Documentation/memory-hotplug.txt @@ -161,7 +161,8 @@ a recent addition and not present on older kernels. in the memory block. 'state' : read-write at read: contains online/offline state of memory. - at write: user can specify "online", "offline" command + at write: user can specify "online_kernel", + "online_movable", "online", "offline" command which will be performed on al sections in the block. 'phys_device' : read-only: designed to show the name of physical memory device. This is not well implemented now. @@ -255,6 +256,17 @@ For onlining, you have to write "online" to the section's state file as: % echo online > /sys/devices/system/memory/memoryXXX/state +This onlining will not change the ZONE type of the target memory section, +If the memory section is in ZONE_NORMAL, you can change it to ZONE_MOVABLE: + +% echo online_movable > /sys/devices/system/memory/memoryXXX/state +(NOTE: current limit: this memory section must be adjacent to ZONE_MOVABLE) + +And if the memory section is in ZONE_MOVABLE, you can change it to ZONE_NORMAL: + +% echo online_kernel > /sys/devices/system/memory/memoryXXX/state +(NOTE: current limit: this memory section must be adjacent to ZONE_NORMAL) + After this, section memoryXXX's state will be 'online' and the amount of available memory will be increased. @@ -377,15 +389,18 @@ The third argument is passed by pointer of struct memory_notify. struct memory_notify { unsigned long start_pfn; unsigned long nr_pages; + int status_change_nid_normal; int status_change_nid; } start_pfn is start_pfn of online/offline memory. nr_pages is # of pages of online/offline memory. +status_change_nid_normal is set node id when N_NORMAL_MEMORY of nodemask +is (will be) set/clear, if this is -1, then nodemask status is not changed. status_change_nid is set node id when N_HIGH_MEMORY of nodemask is (will be) set/clear. It means a new(memoryless) node gets new memory by online and a node loses all memory. If this is -1, then nodemask status is not changed. -If status_changed_nid >= 0, callback should create/discard structures for the +If status_changed_nid* >= 0, callback should create/discard structures for the node if necessary. -------------- diff --git a/Documentation/misc-devices/mei/mei-amt-version.c b/Documentation/misc-devices/mei/mei-amt-version.c index 01804f216312..49e4f770864a 100644 --- a/Documentation/misc-devices/mei/mei-amt-version.c +++ b/Documentation/misc-devices/mei/mei-amt-version.c @@ -214,7 +214,7 @@ out: } /*************************************************************************** - * Intel Advanced Management Technolgy ME Client + * Intel Advanced Management Technology ME Client ***************************************************************************/ #define AMT_MAJOR_VERSION 1 @@ -256,7 +256,7 @@ struct amt_code_versions { } __attribute__((packed)); /*************************************************************************** - * Intel Advanced Management Technolgy Host Interface + * Intel Advanced Management Technology Host Interface ***************************************************************************/ struct amt_host_if_msg_header { diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt index 22ae8441489f..0d98fac8893b 100644 --- a/Documentation/mmc/mmc-dev-attrs.txt +++ b/Documentation/mmc/mmc-dev-attrs.txt @@ -25,6 +25,8 @@ All attributes are read-only. serial Product Serial Number (from CID Register) erase_size Erase group size preferred_erase_size Preferred erase size + raw_rpmb_size_mult RPMB partition size + rel_sectors Reliable write sector count Note on Erase Size and Preferred Erase Size: @@ -65,6 +67,11 @@ Note on Erase Size and Preferred Erase Size: "preferred_erase_size" is in bytes. +Note on raw_rpmb_size_mult: + "raw_rpmb_size_mult" is a mutliple of 128kB block. + RPMB size in byte is calculated by using the following equation: + RPMB partition size = 128kB x raw_rpmb_size_mult + SD/MMC/SDIO Clock Gating Attribute ================================== diff --git a/Documentation/networking/batman-adv.txt b/Documentation/networking/batman-adv.txt index a173d2a879f5..c1d82047a4b1 100644 --- a/Documentation/networking/batman-adv.txt +++ b/Documentation/networking/batman-adv.txt @@ -203,7 +203,8 @@ abled during run time. Following log_levels are defined: 2 - Enable messages related to route added / changed / deleted 4 - Enable messages related to translation table operations 8 - Enable messages related to bridge loop avoidance -15 - enable all messages +16 - Enable messaged related to DAT, ARP snooping and parsing +31 - Enable all messages The debug output can be changed at runtime using the file /sys/class/net/bat0/mesh/log_level. e.g. diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index c7fc10724948..dd52d516cb89 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -30,16 +30,24 @@ neigh/default/gc_thresh3 - INTEGER Maximum number of neighbor entries allowed. Increase this when using large numbers of interfaces and when communicating with large numbers of directly-connected peers. + Default: 1024 neigh/default/unres_qlen_bytes - INTEGER The maximum number of bytes which may be used by packets queued for each unresolved address by other network layers. (added in linux 3.3) + Seting negative value is meaningless and will retrun error. + Default: 65536 Bytes(64KB) neigh/default/unres_qlen - INTEGER The maximum number of packets which may be queued for each unresolved address by other network layers. (deprecated in linux 3.3) : use unres_qlen_bytes instead. + Prior to linux 3.3, the default value is 3 which may cause + unexpected packet loss. The current default value is calculated + according to default value of unres_qlen_bytes and true size of + packet. + Default: 31 mtu_expires - INTEGER Time, in seconds, that cached PMTU information is kept. @@ -199,15 +207,16 @@ tcp_early_retrans - INTEGER Default: 2 tcp_ecn - INTEGER - Enable Explicit Congestion Notification (ECN) in TCP. ECN is only - used when both ends of the TCP flow support it. It is useful to - avoid losses due to congestion (when the bottleneck router supports - ECN). + Control use of Explicit Congestion Notification (ECN) by TCP. + ECN is used only when both ends of the TCP connection indicate + support for it. This feature is useful in avoiding losses due + to congestion by allowing supporting routers to signal + congestion before having to drop packets. Possible values are: - 0 disable ECN - 1 ECN enabled - 2 Only server-side ECN enabled. If the other end does - not support ECN, behavior is like with ECN disabled. + 0 Disable ECN. Neither initiate nor accept ECN. + 1 Always request ECN on outgoing connection attempts. + 2 Enable ECN when requested by incomming connections + but do not request ECN on outgoing connections. Default: 2 tcp_fack - BOOLEAN @@ -215,15 +224,14 @@ tcp_fack - BOOLEAN The value is not used, if tcp_sack is not enabled. tcp_fin_timeout - INTEGER - Time to hold socket in state FIN-WAIT-2, if it was closed - by our side. Peer can be broken and never close its side, - or even died unexpectedly. Default value is 60sec. - Usual value used in 2.2 was 180 seconds, you may restore - it, but remember that if your machine is even underloaded WEB server, - you risk to overflow memory with kilotons of dead sockets, - FIN-WAIT-2 sockets are less dangerous than FIN-WAIT-1, - because they eat maximum 1.5K of memory, but they tend - to live longer. Cf. tcp_max_orphans. + The length of time an orphaned (no longer referenced by any + application) connection will remain in the FIN_WAIT_2 state + before it is aborted at the local end. While a perfectly + valid "receive only" state for an un-orphaned connection, an + orphaned connection in FIN_WAIT_2 state could otherwise wait + forever for the remote to close its end of the connection. + Cf. tcp_max_orphans + Default: 60 seconds tcp_frto - INTEGER Enables Forward RTO-Recovery (F-RTO) defined in RFC4138. @@ -1514,6 +1522,20 @@ cookie_preserve_enable - BOOLEAN Default: 1 +cookie_hmac_alg - STRING + Select the hmac algorithm used when generating the cookie value sent by + a listening sctp socket to a connecting client in the INIT-ACK chunk. + Valid values are: + * md5 + * sha1 + * none + Ability to assign md5 or sha1 as the selected alg is predicated on the + configuarion of those algorithms at build time (CONFIG_CRYPTO_MD5 and + CONFIG_CRYPTO_SHA1). + + Default: Dependent on configuration. MD5 if available, else SHA1 if + available, else none. + rcvbuf_policy - INTEGER Determines if the receive buffer is attributed to the socket or to association. SCTP supports the capability to create multiple diff --git a/Documentation/networking/netdev-features.txt b/Documentation/networking/netdev-features.txt index 4164f5c02e4b..f310edec8a77 100644 --- a/Documentation/networking/netdev-features.txt +++ b/Documentation/networking/netdev-features.txt @@ -164,4 +164,4 @@ read the CRC recorded by the NIC on receipt of the packet. This requests that the NIC receive all possible frames, including errored frames (such as bad FCS, etc). This can be helpful when sniffing a link with bad packets on it. Some NICs may receive more packets if also put into normal -PROMISC mdoe. +PROMISC mode. diff --git a/Documentation/networking/packet_mmap.txt b/Documentation/networking/packet_mmap.txt index 1c08a4b0981f..94444b152fbc 100644 --- a/Documentation/networking/packet_mmap.txt +++ b/Documentation/networking/packet_mmap.txt @@ -3,9 +3,9 @@ -------------------------------------------------------------------------------- This file documents the mmap() facility available with the PACKET -socket interface on 2.4 and 2.6 kernels. This type of sockets is used for -capture network traffic with utilities like tcpdump or any other that needs -raw access to network interface. +socket interface on 2.4/2.6/3.x kernels. This type of sockets is used for +i) capture network traffic with utilities like tcpdump, ii) transmit network +traffic, or any other that needs raw access to network interface. You can find the latest version of this document at: http://wiki.ipxwarzone.com/index.php5?title=Linux_packet_mmap @@ -21,19 +21,18 @@ Please send your comments to + Why use PACKET_MMAP -------------------------------------------------------------------------------- -In Linux 2.4/2.6 if PACKET_MMAP is not enabled, the capture process is very -inefficient. It uses very limited buffers and requires one system call -to capture each packet, it requires two if you want to get packet's -timestamp (like libpcap always does). +In Linux 2.4/2.6/3.x if PACKET_MMAP is not enabled, the capture process is very +inefficient. It uses very limited buffers and requires one system call to +capture each packet, it requires two if you want to get packet's timestamp +(like libpcap always does). In the other hand PACKET_MMAP is very efficient. PACKET_MMAP provides a size configurable circular buffer mapped in user space that can be used to either send or receive packets. This way reading packets just needs to wait for them, most of the time there is no need to issue a single system call. Concerning transmission, multiple packets can be sent through one system call to get the -highest bandwidth. -By using a shared buffer between the kernel and the user also has the benefit -of minimizing packet copies. +highest bandwidth. By using a shared buffer between the kernel and the user +also has the benefit of minimizing packet copies. It's fine to use PACKET_MMAP to improve the performance of the capture and transmission process, but it isn't everything. At least, if you are capturing @@ -41,7 +40,8 @@ at high speeds (this is relative to the cpu speed), you should check if the device driver of your network interface card supports some sort of interrupt load mitigation or (even better) if it supports NAPI, also make sure it is enabled. For transmission, check the MTU (Maximum Transmission Unit) used and -supported by devices of your network. +supported by devices of your network. CPU IRQ pinning of your network interface +card can also be an advantage. -------------------------------------------------------------------------------- + How to use mmap() to improve capture process @@ -87,9 +87,7 @@ the following process: socket creation and destruction is straight forward, and is done the same way with or without PACKET_MMAP: -int fd; - -fd= socket(PF_PACKET, mode, htons(ETH_P_ALL)) + int fd = socket(PF_PACKET, mode, htons(ETH_P_ALL)); where mode is SOCK_RAW for the raw interface were link level information can be captured or SOCK_DGRAM for the cooked @@ -163,11 +161,23 @@ As capture, each frame contains two parts: A complete tutorial is available at: http://wiki.gnu-log.net/ +By default, the user should put data at : + frame base + TPACKET_HDRLEN - sizeof(struct sockaddr_ll) + +So, whatever you choose for the socket mode (SOCK_DGRAM or SOCK_RAW), +the beginning of the user data will be at : + frame base + TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + +If you wish to put user data at a custom offset from the beginning of +the frame (for payload alignment with SOCK_RAW mode for instance) you +can set tp_net (with SOCK_DGRAM) or tp_mac (with SOCK_RAW). In order +to make this work it must be enabled previously with setsockopt() +and the PACKET_TX_HAS_OFF option. + -------------------------------------------------------------------------------- + PACKET_MMAP settings -------------------------------------------------------------------------------- - To setup PACKET_MMAP from user level code is done with a call like - Capture process @@ -201,7 +211,6 @@ indeed, packet_set_ring checks that the following condition is true frames_per_block * tp_block_nr == tp_frame_nr - Lets see an example, with the following values: tp_block_size= 4096 @@ -227,7 +236,6 @@ be spawned across two blocks, so there are some details you have to take into account when choosing the frame_size. See "Mapping and use of the circular buffer (ring)". - -------------------------------------------------------------------------------- + PACKET_MMAP setting constraints -------------------------------------------------------------------------------- @@ -264,7 +272,6 @@ User space programs can include /usr/include/sys/user.h and The pagesize can also be determined dynamically with the getpagesize (2) system call. - Block number limit -------------------- @@ -284,7 +291,6 @@ called pg_vec, its size limits the number of blocks that can be allocated. v block #2 block #1 - kmalloc allocates any number of bytes of physically contiguous memory from a pool of pre-determined sizes. This pool of memory is maintained by the slab allocator which is at the end the responsible for doing the allocation and @@ -299,7 +305,6 @@ pointers to blocks is 131072/4 = 32768 blocks - PACKET_MMAP buffer size calculator ------------------------------------ @@ -340,7 +345,6 @@ and a value for <frame size> of 2048 bytes. These parameters will yield and hence the buffer will have a 262144 MiB size. So it can hold 262144 MiB / 2048 bytes = 134217728 frames - Actually, this buffer size is not possible with an i386 architecture. Remember that the memory is allocated in kernel space, in the case of an i386 kernel's memory size is limited to 1GiB. @@ -372,7 +376,6 @@ the following (from include/linux/if_packet.h): - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. - Pad to align to TPACKET_ALIGNMENT=16 */ - The following are conditions that are checked in packet_set_ring @@ -413,7 +416,6 @@ and the following flags apply: #define TP_STATUS_LOSING 4 #define TP_STATUS_CSUMNOTREADY 8 - TP_STATUS_COPY : This flag indicates that the frame (and associated meta information) has been truncated because it's larger than tp_frame_size. This packet can be @@ -462,7 +464,6 @@ packets are in the ring: It doesn't incur in a race condition to first check the status value and then poll for frames. - ++ Transmission process Those defines are also used for transmission: @@ -494,6 +495,196 @@ The user can also use poll() to check if a buffer is available: retval = poll(&pfd, 1, timeout); ------------------------------------------------------------------------------- ++ What TPACKET versions are available and when to use them? +------------------------------------------------------------------------------- + + int val = tpacket_version; + setsockopt(fd, SOL_PACKET, PACKET_VERSION, &val, sizeof(val)); + getsockopt(fd, SOL_PACKET, PACKET_VERSION, &val, sizeof(val)); + +where 'tpacket_version' can be TPACKET_V1 (default), TPACKET_V2, TPACKET_V3. + +TPACKET_V1: + - Default if not otherwise specified by setsockopt(2) + - RX_RING, TX_RING available + - VLAN metadata information available for packets + (TP_STATUS_VLAN_VALID) + +TPACKET_V1 --> TPACKET_V2: + - Made 64 bit clean due to unsigned long usage in TPACKET_V1 + structures, thus this also works on 64 bit kernel with 32 bit + userspace and the like + - Timestamp resolution in nanoseconds instead of microseconds + - RX_RING, TX_RING available + - How to switch to TPACKET_V2: + 1. Replace struct tpacket_hdr by struct tpacket2_hdr + 2. Query header len and save + 3. Set protocol version to 2, set up ring as usual + 4. For getting the sockaddr_ll, + use (void *)hdr + TPACKET_ALIGN(hdrlen) instead of + (void *)hdr + TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + +TPACKET_V2 --> TPACKET_V3: + - Flexible buffer implementation: + 1. Blocks can be configured with non-static frame-size + 2. Read/poll is at a block-level (as opposed to packet-level) + 3. Added poll timeout to avoid indefinite user-space wait + on idle links + 4. Added user-configurable knobs: + 4.1 block::timeout + 4.2 tpkt_hdr::sk_rxhash + - RX Hash data available in user space + - Currently only RX_RING available + +------------------------------------------------------------------------------- ++ AF_PACKET fanout mode +------------------------------------------------------------------------------- + +In the AF_PACKET fanout mode, packet reception can be load balanced among +processes. This also works in combination with mmap(2) on packet sockets. + +Minimal example code by David S. Miller (try things like "./test eth0 hash", +"./test eth0 lb", etc.): + +#include <stddef.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/socket.h> +#include <sys/ioctl.h> + +#include <unistd.h> + +#include <linux/if_ether.h> +#include <linux/if_packet.h> + +#include <net/if.h> + +static const char *device_name; +static int fanout_type; +static int fanout_id; + +#ifndef PACKET_FANOUT +# define PACKET_FANOUT 18 +# define PACKET_FANOUT_HASH 0 +# define PACKET_FANOUT_LB 1 +#endif + +static int setup_socket(void) +{ + int err, fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_IP)); + struct sockaddr_ll ll; + struct ifreq ifr; + int fanout_arg; + + if (fd < 0) { + perror("socket"); + return EXIT_FAILURE; + } + + memset(&ifr, 0, sizeof(ifr)); + strcpy(ifr.ifr_name, device_name); + err = ioctl(fd, SIOCGIFINDEX, &ifr); + if (err < 0) { + perror("SIOCGIFINDEX"); + return EXIT_FAILURE; + } + + memset(&ll, 0, sizeof(ll)); + ll.sll_family = AF_PACKET; + ll.sll_ifindex = ifr.ifr_ifindex; + err = bind(fd, (struct sockaddr *) &ll, sizeof(ll)); + if (err < 0) { + perror("bind"); + return EXIT_FAILURE; + } + + fanout_arg = (fanout_id | (fanout_type << 16)); + err = setsockopt(fd, SOL_PACKET, PACKET_FANOUT, + &fanout_arg, sizeof(fanout_arg)); + if (err) { + perror("setsockopt"); + return EXIT_FAILURE; + } + + return fd; +} + +static void fanout_thread(void) +{ + int fd = setup_socket(); + int limit = 10000; + + if (fd < 0) + exit(fd); + + while (limit-- > 0) { + char buf[1600]; + int err; + + err = read(fd, buf, sizeof(buf)); + if (err < 0) { + perror("read"); + exit(EXIT_FAILURE); + } + if ((limit % 10) == 0) + fprintf(stdout, "(%d) \n", getpid()); + } + + fprintf(stdout, "%d: Received 10000 packets\n", getpid()); + + close(fd); + exit(0); +} + +int main(int argc, char **argp) +{ + int fd, err; + int i; + + if (argc != 3) { + fprintf(stderr, "Usage: %s INTERFACE {hash|lb}\n", argp[0]); + return EXIT_FAILURE; + } + + if (!strcmp(argp[2], "hash")) + fanout_type = PACKET_FANOUT_HASH; + else if (!strcmp(argp[2], "lb")) + fanout_type = PACKET_FANOUT_LB; + else { + fprintf(stderr, "Unknown fanout type [%s]\n", argp[2]); + exit(EXIT_FAILURE); + } + + device_name = argp[1]; + fanout_id = getpid() & 0xffff; + + for (i = 0; i < 4; i++) { + pid_t pid = fork(); + + switch (pid) { + case 0: + fanout_thread(); + + case -1: + perror("fork"); + exit(EXIT_FAILURE); + } + } + + for (i = 0; i < 4; i++) { + int status; + + wait(&status); + } + + return 0; +} + +------------------------------------------------------------------------------- + PACKET_TIMESTAMP ------------------------------------------------------------------------------- @@ -519,6 +710,13 @@ the networking stack is used (the behavior before this setting was added). See include/linux/net_tstamp.h and Documentation/networking/timestamping for more information on hardware timestamps. +------------------------------------------------------------------------------- ++ Miscellaneous bits +------------------------------------------------------------------------------- + +- Packet sockets work well together with Linux socket filters, thus you also + might want to have a look at Documentation/networking/filter.txt + -------------------------------------------------------------------------------- + THANKS -------------------------------------------------------------------------------- diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt index ef9ee71b4d7f..f9fa6db40a52 100644 --- a/Documentation/networking/stmmac.txt +++ b/Documentation/networking/stmmac.txt @@ -29,11 +29,9 @@ The kernel configuration option is STMMAC_ETH: dma_txsize: DMA tx ring size; buf_sz: DMA buffer size; tc: control the HW FIFO threshold; - tx_coe: Enable/Disable Tx Checksum Offload engine; watchdog: transmit timeout (in milliseconds); flow_ctrl: Flow control ability [on/off]; pause: Flow Control Pause Time; - tmrate: timer period (only if timer optimisation is configured). 3) Command line options Driver parameters can be also passed in command line by using: @@ -60,17 +58,19 @@ Then the poll method will be scheduled at some future point. The incoming packets are stored, by the DMA, in a list of pre-allocated socket buffers in order to avoid the memcpy (Zero-copy). -4.3) Timer-Driver Interrupt -Instead of having the device that asynchronously notifies the frame receptions, -the driver configures a timer to generate an interrupt at regular intervals. -Based on the granularity of the timer, the frames that are received by the -device will experience different levels of latency. Some NICs have dedicated -timer device to perform this task. STMMAC can use either the RTC device or the -TMU channel 2 on STLinux platforms. -The timers frequency can be passed to the driver as parameter; when change it, -take care of both hardware capability and network stability/performance impact. -Several performance tests on STM platforms showed this optimisation allows to -spare the CPU while having the maximum throughput. +4.3) Interrupt Mitigation +The driver is able to mitigate the number of its DMA interrupts +using NAPI for the reception on chips older than the 3.50. +New chips have an HW RX-Watchdog used for this mitigation. + +On Tx-side, the mitigation schema is based on a SW timer that calls the +tx function (stmmac_tx) to reclaim the resource after transmitting the +frames. +Also there is another parameter (like a threshold) used to program +the descriptors avoiding to set the interrupt on completion bit in +when the frame is sent (xmit). + +Mitigation parameters can be tuned by ethtool. 4.4) WOL Wake up on Lan feature through Magic and Unicast frames are supported for the @@ -121,6 +121,7 @@ struct plat_stmmacenet_data { int bugged_jumbo; int pmt; int force_sf_dma_mode; + int riwt_off; void (*fix_mac_speed)(void *priv, unsigned int speed); void (*bus_setup)(void __iomem *ioaddr); int (*init)(struct platform_device *pdev); @@ -156,6 +157,7 @@ Where: o pmt: core has the embedded power module (optional). o force_sf_dma_mode: force DMA to use the Store and Forward mode instead of the Threshold. + o riwt_off: force to disable the RX watchdog feature and switch to NAPI mode. o fix_mac_speed: this callback is used for modifying some syscfg registers (on ST SoCs) according to the link speed negotiated by the physical layer . diff --git a/Documentation/networking/vxlan.txt b/Documentation/networking/vxlan.txt index 5b34b762d7d5..6d993510f091 100644 --- a/Documentation/networking/vxlan.txt +++ b/Documentation/networking/vxlan.txt @@ -32,7 +32,7 @@ no entry is in the forwarding table. # ip link delete vxlan0 3. Show vxlan info - # ip -d show vxlan0 + # ip -d link show vxlan0 It is possible to create, destroy and display the vxlan forwarding table using the new bridge command. @@ -41,7 +41,7 @@ forwarding table using the new bridge command. # bridge fdb add to 00:17:42:8a:b4:05 dst 192.19.0.2 dev vxlan0 2. Delete forwarding table entry - # bridge fdb delete 00:17:42:8a:b4:05 + # bridge fdb delete 00:17:42:8a:b4:05 dev vxlan0 3. Show forwarding table # bridge fdb show dev vxlan0 diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt index 3b4ee5328868..da40efbef6ec 100644 --- a/Documentation/pinctrl.txt +++ b/Documentation/pinctrl.txt @@ -364,6 +364,9 @@ will get an pin number into its handled number range. Further it is also passed the range ID value, so that the pin controller knows which range it should deal with. +Calling pinctrl_add_gpio_range from pinctrl driver is DEPRECATED. Please see +section 2.1 of Documentation/devicetree/bindings/gpio/gpio.txt on how to bind +pinctrl and gpio drivers. PINMUX interfaces ================= @@ -1193,4 +1196,6 @@ foo_switch() ... } -The above has to be done from process context. +The above has to be done from process context. The reservation of the pins +will be done when the state is activated, so in effect one specific pin +can be used by different functions at different times on a running system. diff --git a/Documentation/power/pm_qos_interface.txt b/Documentation/power/pm_qos_interface.txt index 17e130a80347..79a2a58425ee 100644 --- a/Documentation/power/pm_qos_interface.txt +++ b/Documentation/power/pm_qos_interface.txt @@ -99,7 +99,7 @@ reading the aggregated value does not require any locking mechanism. From kernel mode the use of this interface is the following: -int dev_pm_qos_add_request(device, handle, value): +int dev_pm_qos_add_request(device, handle, type, value): Will insert an element into the list for that identified device with the target value. Upon change to this list the new target is recomputed and any registered notifiers are called only if the target value is now different. diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index d90d8ec2853d..b9cfd339a6fa 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -1905,7 +1905,6 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. vid - Vendor ID for the device (optional) pid - Product ID for the device (optional) nrpacks - Max. number of packets per URB (default: 8) - async_unlink - Use async unlink mode (default: yes) device_setup - Device specific magic number (optional) - Influence depends on the device - Default: 0x0000 @@ -1917,8 +1916,6 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. NB: nrpacks parameter can be modified dynamically via sysfs. Don't put the value over 20. Changing via sysfs has no sanity check. - NB: async_unlink=0 would cause Oops. It remains just for - debugging purpose (if any). NB: ignore_ctl_error=1 may help when you get an error at accessing the mixer element such as URB error -22. This happens on some buggy USB device or the controller. diff --git a/Documentation/telephony/00-INDEX b/Documentation/telephony/00-INDEX deleted file mode 100644 index 4ffe0ed5b6fb..000000000000 --- a/Documentation/telephony/00-INDEX +++ /dev/null @@ -1,4 +0,0 @@ -00-INDEX - - this file. -ixj.txt - - document describing the Quicknet drivers. diff --git a/Documentation/telephony/ixj.txt b/Documentation/telephony/ixj.txt deleted file mode 100644 index db94fb6c5678..000000000000 --- a/Documentation/telephony/ixj.txt +++ /dev/null @@ -1,394 +0,0 @@ -Linux Quicknet-Drivers-Howto -Quicknet Technologies, Inc. (www.quicknet.net) -Version 0.3.4 December 18, 1999 - -1.0 Introduction - -This document describes the first GPL release version of the Linux -driver for the Quicknet Internet PhoneJACK and Internet LineJACK -cards. More information about these cards is available at -www.quicknet.net. The driver version discussed in this document is -0.3.4. - -These cards offer nice telco style interfaces to use your standard -telephone/key system/PBX as the user interface for VoIP applications. -The Internet LineJACK also offers PSTN connectivity for a single line -Internet to PSTN gateway. Of course, you can add more than one card -to a system to obtain multi-line functionality. At this time, the -driver supports the POTS port on both the Internet PhoneJACK and the -Internet LineJACK, but the PSTN port on the latter card is not yet -supported. - -This document, and the drivers for the cards, are intended for a -limited audience that includes technically capable programmers who -would like to experiment with Quicknet cards. The drivers are -considered in ALPHA status and are not yet considered stable enough -for general, widespread use in an unlimited audience. - -That's worth saying again: - -THE LINUX DRIVERS FOR QUICKNET CARDS ARE PRESENTLY IN A ALPHA STATE -AND SHOULD NOT BE CONSIDERED AS READY FOR NORMAL WIDESPREAD USE. - -They are released early in the spirit of Internet development and to -make this technology available to innovators who would benefit from -early exposure. - -When we promote the device driver to "beta" level it will be -considered ready for non-programmer, non-technical users. Until then, -please be aware that these drivers may not be stable and may affect -the performance of your system. - - -1.1 Latest Additions/Improvements - -The 0.3.4 version of the driver is the first GPL release. Several -features had to be removed from the prior binary only module, mostly -for reasons of Intellectual Property rights. We can't release -information that is not ours - so certain aspects of the driver had to -be removed to protect the rights of others. - -Specifically, very old Internet PhoneJACK cards have non-standard -G.723.1 codecs (due to the early nature of the DSPs in those days). -The auto-conversion code to bring those cards into compliance with -today's standards is available as a binary only module to those people -needing it. If you bought your card after 1997 or so, you are OK - -it's only the very old cards that are affected. - -Also, the code to download G.728/G.729/G.729a codecs to the DSP is -available as a binary only module as well. This IP is not ours to -release. - -Hooks are built into the GPL driver to allow it to work with other -companion modules that are completely separate from this module. - -1.2 Copyright, Trademarks, Disclaimer, & Credits - -Copyright - -Copyright (c) 1999 Quicknet Technologies, Inc. Permission is granted -to freely copy and distribute this document provided you preserve it -in its original form. For corrections and minor changes contact the -maintainer at linux@quicknet.net. - -Trademarks - -Internet PhoneJACK and Internet LineJACK are registered trademarks of -Quicknet Technologies, Inc. - -Disclaimer - -Much of the info in this HOWTO is early information released by -Quicknet Technologies, Inc. for the express purpose of allowing early -testing and use of the Linux drivers developed for their products. -While every attempt has been made to be thorough, complete and -accurate, the information contained here may be unreliable and there -are likely a number of errors in this document. Please let the -maintainer know about them. Since this is free documentation, it -should be obvious that neither I nor previous authors can be held -legally responsible for any errors. - -Credits - -This HOWTO was written by: - - Greg Herlein <gherlein@quicknet.net> - Ed Okerson <eokerson@quicknet.net> - -1.3 Future Plans: You Can Help - -Please let the maintainer know of any errors in facts, opinions, -logic, spelling, grammar, clarity, links, etc. But first, if the date -is over a month old, check to see that you have the latest -version. Please send any info that you think belongs in this document. - -You can also contribute code and/or bug-fixes for the sample -applications. - - -1.4 Where to get things - -Info on latest versions of the driver are here: - -http://web.archive.org/web/*/http://www.quicknet.net/develop.htm - -1.5 Mailing List - -Quicknet operates a mailing list to provide a public forum on using -these drivers. - -To subscribe to the linux-sdk mailing list, send an email to: - - majordomo@linux.quicknet.net - -In the body of the email, type: - - subscribe linux-sdk <your-email-address> - -Please delete any signature block that you would normally add to the -bottom of your email - it tends to confuse majordomo. - -To send mail to the list, address your mail to - - linux-sdk@linux.quicknet.net - -Your message will go out to everyone on the list. - -To unsubscribe to the linux-sdk mailing list, send an email to: - - majordomo@linux.quicknet.net - -In the body of the email, type: - - unsubscribe linux-sdk <your-email-address> - - - -2.0 Requirements - -2.1 Quicknet Card(s) - -You will need at least one Internet PhoneJACK or Internet LineJACK -cards. These are ISA or PCI bus devices that use Plug-n-Play for -configuration, and use no IRQs. The driver will support up to 16 -cards in any one system, of any mix between the two types. - -Note that you will need two cards to do any useful testing alone, since -you will need a card on both ends of the connection. Of course, if -you are doing collaborative work, perhaps your friends or coworkers -have cards too. If not, we'll gladly sell them some! - - -2.2 ISAPNP - -Since the Quicknet cards are Plug-n-Play devices, you will need the -isapnp tools package to configure the cards, or you can use the isapnp -module to autoconfigure them. The former package probably came with -your Linux distribution. Documentation on this package is available -online at: - -http://mailer.wiwi.uni-marburg.de/linux/LDP/HOWTO/Plug-and-Play-HOWTO.html - -The isapnp autoconfiguration is available on the Quicknet website at: - - http://www.quicknet.net/develop.htm - -though it may be in the kernel by the time you read this. - - -3.0 Card Configuration - -If you did not get your drivers as part of the linux kernel, do the -following to install them: - - a. untar the distribution file. We use the following command: - tar -xvzf ixj-0.x.x.tgz - -This creates a subdirectory holding all the necessary files. Go to that -subdirectory. - - b. run the "ixj_dev_create" script to remove any stray device -files left in the /dev directory, and to create the new officially -designated device files. Note that the old devices were called -/dev/ixj, and the new method uses /dev/phone. - - c. type "make;make install" - this will compile and install the -module. - - d. type "depmod -av" to rebuild all your kernel version dependencies. - - e. if you are using the isapnp module to configure the cards - automatically, then skip to step f. Otherwise, ensure that you - have run the isapnp configuration utility to properly configure - the cards. - - e1. The Internet PhoneJACK has one configuration register that - requires 16 IO ports. The Internet LineJACK card has two - configuration registers and isapnp reports that IO 0 - requires 16 IO ports and IO 1 requires 8. The Quicknet - driver assumes that these registers are configured to be - contiguous, i.e. if IO 0 is set to 0x340 then IO 1 should - be set to 0x350. - - Make sure that none of the cards overlap if you have - multiple cards in the system. - - If you are new to the isapnp tools, you can jumpstart - yourself by doing the following: - - e2. go to the /etc directory and run pnpdump to get a blank - isapnp.conf file. - - pnpdump > /etc/isapnp.conf - - e3. edit the /etc/isapnp.conf file to set the IO warnings and - the register IO addresses. The IO warnings means that you - should find the line in the file that looks like this: - - (CONFLICT (IO FATAL)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) # or WARNING - - and you should edit the line to look like this: - - (CONFLICT (IO WARNING)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) # - or WARNING - - The next step is to set the IO port addresses. The issue - here is that isapnp does not identify all of the ports out - there. Specifically any device that does not have a driver - or module loaded by Linux will not be registered. This - includes older sound cards and network cards. We have - found that the IO port 0x300 is often used even though - isapnp claims that no-one is using those ports. We - recommend that for a single card installation that port - 0x340 (and 0x350) be used. The IO port line should change - from this: - - (IO 0 (SIZE 16) (BASE 0x0300) (CHECK)) - - to this: - - (IO 0 (SIZE 16) (BASE 0x0340) ) - - e4. if you have multiple Quicknet cards, make sure that you do - not have any overlaps. Be especially careful if you are - mixing Internet PhoneJACK and Internet LineJACK cards in - the same system. In these cases we recommend moving the - IO port addresses to the 0x400 block. Please note that on - a few machines the 0x400 series are used. Feel free to - experiment with other addresses. Our cards have been - proven to work using IO addresses of up to 0xFF0. - - e5. the last step is to uncomment the activation line so the - drivers will be associated with the port. This means the - line (immediately below) the IO line should go from this: - - # (ACT Y) - - to this: - - (ACT Y) - - Once you have finished editing the isapnp.conf file you - must submit it into the pnp driverconfigure the cards. - This is done using the following command: - - isapnp isapnp.conf - - If this works you should see a line that identifies the - Quicknet device, the IO port(s) chosen, and a message - "Enabled OK". - - f. if you are loading the module by hand, use insmod. An example -of this would look like this: - - insmod phonedev - insmod ixj dspio=0x320,0x310 xio=0,0x330 - -Then verify the module loaded by running lsmod. If you are not using a -module that matches your kernel version, you may need to "force" the -load using the -f option in the insmod command. - - insmod phonedev - insmod -f ixj dspio=0x320,0x310 xio=0,0x330 - - -If you are using isapnp to autoconfigure your card, then you do NOT -need any of the above, though you need to use depmod to load the -driver, like this: - - depmod ixj - -which will result in the needed drivers getting loaded automatically. - - g. if you are planning on having the kernel automatically request -the module for you, then you need to edit /etc/conf.modules and add the -following lines: - - options ixj dspio=0x340 xio=0x330 ixjdebug=0 - -If you do this, then when you execute an application that uses the -module the kernel will request that it is loaded. - - h. if you want non-root users to be able to read and write to the -ixj devices (this is a good idea!) you should do the following: - - - decide upon a group name to use and create that group if - needed. Add the user names to that group that you wish to - have access to the device. For example, we typically will - create a group named "ixj" in /etc/group and add all users - to that group that we want to run software that can use the - ixjX devices. - - - change the permissions on the device files, like this: - - chgrp ixj /dev/ixj* - chmod 660 /dev/ixj* - -Once this is done, then non-root users should be able to use the -devices. If you have enabled autoloading of modules, then the user -should be able to open the device and have the module loaded -automatically for them. - - -4.0 Driver Installation problems. - -We have tested these drivers on the 2.2.9, 2.2.10, 2.2.12, and 2.2.13 kernels -and in all cases have eventually been able to get the drivers to load and -run. We have found four types of problems that prevent this from happening. -The problems and solutions are: - - a. A step was missed in the installation. Go back and use section 3 -as a checklist. Many people miss running the ixj_dev_create script and thus -never load the device names into the filesystem. - - b. The kernel is inconsistently linked. We have found this problem in -the Out Of the Box installation of several distributions. The symptoms -are that neither driver will load, and that the unknown symbols include "jiffy" -and "kmalloc". The solution is to recompile both the kernel and the -modules. The command string for the final compile looks like this: - - In the kernel directory: - 1. cp .config /tmp - 2. make mrproper - 3. cp /tmp/.config . - 4. make clean;make bzImage;make modules;make modules_install - -This rebuilds both the kernel and all the modules and makes sure they all -have the same linkages. This generally solves the problem once the new -kernel is installed and the system rebooted. - - c. The kernel has been patched, then unpatched. This happens when -someone decides to use an earlier kernel after they load a later kernel. -The symptoms are proceeding through all three above steps and still not -being able to load the driver. What has happened is that the generated -header files are out of sync with the kernel itself. The solution is -to recompile (again) using "make mrproper". This will remove and then -regenerate all the necessary header files. Once this is done, then you -need to install and reboot the kernel. We have not seen any problem -loading one of our drivers after this treatment. - -5.0 Known Limitations - -We cannot currently play "dial-tone" and listen for DTMF digits at the -same time using the ISA PhoneJACK. This is a bug in the 8020 DSP chip -used on that product. All other Quicknet products function normally -in this regard. We have a work-around, but it's not done yet. Until -then, if you want dial-tone, you can always play a recorded dial-tone -sound into the audio until you have gathered the DTMF digits. - - - - - - - - - - - - - - - - - diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index ca1a1a34970e..88c02334e356 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -112,6 +112,29 @@ temperature) and throttle appropriate devices. trip: indicates which trip point the cooling devices is associated with in this thermal zone. +1.4 Thermal Zone Parameters +1.4.1 struct thermal_bind_params + This structure defines the following parameters that are used to bind + a zone with a cooling device for a particular trip point. + .cdev: The cooling device pointer + .weight: The 'influence' of a particular cooling device on this zone. + This is on a percentage scale. The sum of all these weights + (for a particular zone) cannot exceed 100. + .trip_mask:This is a bit mask that gives the binding relation between + this thermal zone and cdev, for a particular trip point. + If nth bit is set, then the cdev and thermal zone are bound + for trip point n. + .match: This call back returns success(0) if the 'tz and cdev' need to + be bound, as per platform data. +1.4.2 struct thermal_zone_params + This structure defines the platform level parameters for a thermal zone. + This data, for each thermal zone should come from the platform layer. + This is an optional feature where some platforms can choose not to + provide this data. + .governor_name: Name of the thermal governor used for this zone + .num_tbps: Number of thermal_bind_params entries for this zone + .tbp: thermal_bind_params entries + 2. sysfs attributes structure RO read only value @@ -126,6 +149,7 @@ Thermal zone device sys I/F, created once it's registered: |---type: Type of the thermal zone |---temp: Current temperature |---mode: Working mode of the thermal zone + |---policy: Thermal governor used for this zone |---trip_point_[0-*]_temp: Trip point temperature |---trip_point_[0-*]_type: Trip point type |---trip_point_[0-*]_hyst: Hysteresis value for this trip point @@ -187,6 +211,10 @@ mode charge of the thermal management. RW, Optional +policy + One of the various thermal governors used for a particular zone. + RW, Required + trip_point_[0-*]_temp The temperature above which trip point will be fired. Unit: millidegree Celsius @@ -264,6 +292,7 @@ method, the sys I/F structure will be built like this: |---type: acpitz |---temp: 37000 |---mode: enabled + |---policy: step_wise |---trip_point_0_temp: 100000 |---trip_point_0_type: critical |---trip_point_1_temp: 80000 @@ -305,3 +334,38 @@ to a thermal_zone_device when it registers itself with the framework. The event will be one of:{THERMAL_AUX0, THERMAL_AUX1, THERMAL_CRITICAL, THERMAL_DEV_FAULT}. Notification can be sent when the current temperature crosses any of the configured thresholds. + +5. Export Symbol APIs: + +5.1: get_tz_trend: +This function returns the trend of a thermal zone, i.e the rate of change +of temperature of the thermal zone. Ideally, the thermal sensor drivers +are supposed to implement the callback. If they don't, the thermal +framework calculated the trend by comparing the previous and the current +temperature values. + +5.2:get_thermal_instance: +This function returns the thermal_instance corresponding to a given +{thermal_zone, cooling_device, trip_point} combination. Returns NULL +if such an instance does not exist. + +5.3:notify_thermal_framework: +This function handles the trip events from sensor drivers. It starts +throttling the cooling devices according to the policy configured. +For CRITICAL and HOT trip points, this notifies the respective drivers, +and does actual throttling for other trip points i.e ACTIVE and PASSIVE. +The throttling policy is based on the configured platform data; if no +platform data is provided, this uses the step_wise throttling policy. + +5.4:thermal_cdev_update: +This function serves as an arbitrator to set the state of a cooling +device. It sets the cooling device to the deepest cooling state if +possible. + +5.5:thermal_register_governor: +This function lets the various thermal governors to register themselves +with the Thermal framework. At run time, depending on a zone's platform +data, a particular governor is used for throttling. + +5.6:thermal_unregister_governor: +This function unregisters a governor from the thermal framework. diff --git a/Documentation/usb/error-codes.txt b/Documentation/usb/error-codes.txt index b3f606b81a03..9c3eb845ebe5 100644 --- a/Documentation/usb/error-codes.txt +++ b/Documentation/usb/error-codes.txt @@ -21,6 +21,8 @@ Non-USB-specific: USB-specific: +-EBUSY The URB is already active. + -ENODEV specified USB-device or bus doesn't exist -ENOENT specified interface or endpoint does not exist or @@ -35,9 +37,8 @@ USB-specific: d) ISO: number_of_packets is < 0 e) various other cases --EAGAIN a) specified ISO start frame too early - b) (using ISO-ASAP) too much scheduled for the future - wait some time and try again. +-EXDEV ISO: URB_ISO_ASAP wasn't specified and all the frames + the URB would be scheduled in have already expired. -EFBIG Host controller driver can't schedule that many ISO frames. diff --git a/Documentation/usb/mass-storage.txt b/Documentation/usb/mass-storage.txt index e9b9334627bf..59063ad7a60d 100644 --- a/Documentation/usb/mass-storage.txt +++ b/Documentation/usb/mass-storage.txt @@ -20,9 +20,9 @@ This document describes how to use the gadget from user space, its relation to mass storage function (or MSF) and different gadgets - using it, and how it differs from File Storage Gadget (or FSG). It - will talk only briefly about how to use MSF within composite - gadgets. + using it, and how it differs from File Storage Gadget (or FSG) + (which is no longer included in Linux). It will talk only briefly + about how to use MSF within composite gadgets. * Module parameters @@ -198,16 +198,15 @@ The Mass Storage Function and thus the Mass Storage Gadget has been based on the File Storage Gadget. The difference between the two is that MSG is a composite gadget (ie. uses the composite framework) - while file storage gadget is a traditional gadget. From userspace + while file storage gadget was a traditional gadget. From userspace point of view this distinction does not really matter, but from kernel hacker's point of view, this means that (i) MSG does not duplicate code needed for handling basic USB protocol commands and (ii) MSF can be used in any other composite gadget. - Because of that, File Storage Gadget has been deprecated and - scheduled to be removed in Linux 3.8. All users need to transition - to the Mass Storage Gadget by that time. The two gadgets behave - mostly the same from the outside except: + Because of that, File Storage Gadget has been removed in Linux 3.8. + All users need to transition to the Mass Storage Gadget. The two + gadgets behave mostly the same from the outside except: 1. In FSG the “removable” and “cdrom” module parameters set the flag for all logical units whereas in MSG they accept a list of y/n diff --git a/Documentation/video4linux/bttv/Cards b/Documentation/video4linux/bttv/Cards index db833ced2cb8..a8fb6e2d3c8b 100644 --- a/Documentation/video4linux/bttv/Cards +++ b/Documentation/video4linux/bttv/Cards @@ -43,7 +43,7 @@ Very nice card if you only have satellite TV but several tuners connected to the card via composite. Many thanks to Matrix-Vision for giving us 2 cards for free which made -Bt848a/Bt849 single crytal operation support possible!!! +Bt848a/Bt849 single crystal operation support possible!!! diff --git a/Documentation/video4linux/bttv/Sound-FAQ b/Documentation/video4linux/bttv/Sound-FAQ index 395f6c6fdd98..d3f1d7783d1c 100644 --- a/Documentation/video4linux/bttv/Sound-FAQ +++ b/Documentation/video4linux/bttv/Sound-FAQ @@ -82,7 +82,7 @@ card installed, you might to check out if you can read these registers values used by the windows driver. A tool to do this is available from ftp://telepresence.dmem.strath.ac.uk/pub/bt848/winutil, but it does'nt work with bt878 boards according to some reports I received. -Another one with bt878 suport is available from +Another one with bt878 support is available from http://btwincap.sourceforge.net/Files/btspy2.00.zip You might also dig around in the *.ini files of the Windows applications. diff --git a/Documentation/vm/frontswap.txt b/Documentation/vm/frontswap.txt index 5ef2d1366425..c71a019be600 100644 --- a/Documentation/vm/frontswap.txt +++ b/Documentation/vm/frontswap.txt @@ -193,7 +193,7 @@ faster. or maybe swap-over-nbd/NFS)? No. First, the existing swap subsystem doesn't allow for any kind of -swap hierarchy. Perhaps it could be rewritten to accomodate a hierarchy, +swap hierarchy. Perhaps it could be rewritten to accommodate a hierarchy, but this would require fairly drastic changes. Even if it were rewritten, the existing swap subsystem uses the block I/O layer which assumes a swap device is fixed size and any page in it is linearly diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt index 9efceff51bfb..f15cb74c4f78 100644 --- a/Documentation/x86/boot.txt +++ b/Documentation/x86/boot.txt @@ -1013,7 +1013,7 @@ boot_params as that of 16-bit boot protocol, the boot loader should also fill the additional fields of the struct boot_params as that described in zero-page.txt. -After setupping the struct boot_params, the boot loader can load the +After setting up the struct boot_params, the boot loader can load the 32/64-bit kernel in the same way as that of 16-bit boot protocol. In 32-bit boot protocol, the kernel is started by jumping to the @@ -1023,7 +1023,7 @@ In 32-bit boot protocol, the kernel is started by jumping to the At entry, the CPU must be in 32-bit protected mode with paging disabled; a GDT must be loaded with the descriptors for selectors __BOOT_CS(0x10) and __BOOT_DS(0x18); both descriptors must be 4G flat -segment; __BOOS_CS must have execute/read permission, and __BOOT_DS +segment; __BOOT_CS must have execute/read permission, and __BOOT_DS must have read/write permission; CS must be __BOOT_CS and DS, ES, SS must be __BOOT_DS; interrupt must be disabled; %esi must hold the base address of the struct boot_params; %ebp, %edi and %ebx must be zero. diff --git a/Documentation/zh_CN/arm/kernel_user_helpers.txt b/Documentation/zh_CN/arm/kernel_user_helpers.txt new file mode 100644 index 000000000000..cd7fc8f34cf9 --- /dev/null +++ b/Documentation/zh_CN/arm/kernel_user_helpers.txt @@ -0,0 +1,284 @@ +Chinese translated version of Documentation/arm/kernel_user_helpers.txt + +If you have any comment or update to the content, please contact the +original document maintainer directly. However, if you have a problem +communicating in English you can also ask the Chinese maintainer for +help. Contact the Chinese maintainer if this translation is outdated +or if there is a problem with the translation. + +Maintainer: Nicolas Pitre <nicolas.pitre@linaro.org> + Dave Martin <dave.martin@linaro.org> +Chinese maintainer: Fu Wei <tekkamanninja@gmail.com> +--------------------------------------------------------------------- +Documentation/arm/kernel_user_helpers.txt 的中文翻译 + +如果想评论或更新本文的内容，请直接联系原文档的维护者。如果你使用英文 +交流有困难的话，也可以向中文版维护者求助。如果本翻译更新不及时或者翻 +译存在问题，请联系中文版维护者。 +英文版维护者： Nicolas Pitre <nicolas.pitre@linaro.org> + Dave Martin <dave.martin@linaro.org> +中文版维护者： 傅炜 Fu Wei <tekkamanninja@gmail.com> +中文版翻译者： 傅炜 Fu Wei <tekkamanninja@gmail.com> +中文版校译者： 宋冬生 Dongsheng Song <dongshneg.song@gmail.com> + 傅炜 Fu Wei <tekkamanninja@gmail.com> + + +以下为正文 +--------------------------------------------------------------------- +内核提供的用户空间辅助代码 +========================= + +在内核内存空间的固定地址处，有一个由内核提供并可从用户空间访问的代码 +段。它用于向用户空间提供因在许多 ARM CPU 中未实现的特性和/或指令而需 +内核提供帮助的某些操作。这些代码直接在用户模式下执行的想法是为了获得 +最佳效率，但那些与内核计数器联系过于紧密的部分，则被留给了用户库实现。 +事实上，此代码甚至可能因不同的 CPU 而异，这取决于其可用的指令集或它 +是否为 SMP 系统。换句话说，内核保留在不作出警告的情况下根据需要更改 +这些代码的权利。只有本文档描述的入口及其结果是保证稳定的。 + +这与完全成熟的 VDSO 实现不同（但两者并不冲突），尽管如此，VDSO 可阻止 +某些通过常量高效跳转到那些代码段的汇编技巧。且由于那些代码段在返回用户 +代码前仅使用少量的代码周期，则一个 VDSO 间接远程调用将会在这些简单的 +操作上增加一个可测量的开销。 + +在对那些拥有原生支持的新型处理器进行代码优化时，仅在已为其他操作使用 +了类似的新增指令，而导致二进制结果已与早期 ARM 处理器不兼容的情况下， +用户空间才应绕过这些辅助代码，并在内联函数中实现这些操作（无论是通过 +编译器在代码中直接放置，还是作为库函数调用实现的一部分）。也就是说， +如果你编译的代码不会为了其他目的使用新指令，则不要仅为了避免使用这些 +内核辅助代码，导致二进制程序无法在早期处理器上运行。 + +新的辅助代码可能随着时间的推移而增加，所以新内核中的某些辅助代码在旧 +内核中可能不存在。因此，程序必须在对任何辅助代码调用假设是安全之前， +检测 __kuser_helper_version 的值（见下文）。理想情况下，这种检测应该 +只在进程启动时执行一次；如果内核版本不支持所需辅助代码，则该进程可尽早 +中止执行。 + +kuser_helper_version +-------------------- + +位置: 0xffff0ffc + +参考声明: + + extern int32_t __kuser_helper_version; + +定义: + + 这个区域包含了当前运行内核实现的辅助代码版本号。用户空间可以通过读 + 取此版本号以确定特定的辅助代码是否存在。 + +使用范例: + +#define __kuser_helper_version (*(int32_t *)0xffff0ffc) + +void check_kuser_version(void) +{ + if (__kuser_helper_version < 2) { + fprintf(stderr, "can't do atomic operations, kernel too old\n"); + abort(); + } +} + +注意: + + 用户空间可以假设这个域的值不会在任何单个进程的生存期内改变。也就 + 是说，这个域可以仅在库的初始化阶段或进程启动阶段读取一次。 + +kuser_get_tls +------------- + +位置: 0xffff0fe0 + +参考原型: + + void * __kuser_get_tls(void); + +输入: + + lr = 返回地址 + +输出: + + r0 = TLS 值 + +被篡改的寄存器: + + 无 + +定义: + + 获取之前通过 __ARM_NR_set_tls 系统调用设置的 TLS 值。 + +使用范例: + +typedef void * (__kuser_get_tls_t)(void); +#define __kuser_get_tls (*(__kuser_get_tls_t *)0xffff0fe0) + +void foo() +{ + void *tls = __kuser_get_tls(); + printf("TLS = %p\n", tls); +} + +注意: + + - 仅在 __kuser_helper_version >= 1 时，此辅助代码存在 + （从内核版本 2.6.12 开始）。 + +kuser_cmpxchg +------------- + +位置: 0xffff0fc0 + +参考原型: + + int __kuser_cmpxchg(int32_t oldval, int32_t newval, volatile int32_t *ptr); + +输入: + + r0 = oldval + r1 = newval + r2 = ptr + lr = 返回地址 + +输出: + + r0 = 成功代码 (零或非零) + C flag = 如果 r0 == 0 则置 1，如果 r0 != 0 则清零。 + +被篡改的寄存器: + + r3, ip, flags + +定义: + + 仅在 *ptr 为 oldval 时原子保存 newval 于 *ptr 中。 + 如果 *ptr 被改变，则返回值为零，否则为非零值。 + 如果 *ptr 被改变，则 C flag 也会被置 1，以实现调用代码中的汇编 + 优化。 + +使用范例: + +typedef int (__kuser_cmpxchg_t)(int oldval, int newval, volatile int *ptr); +#define __kuser_cmpxchg (*(__kuser_cmpxchg_t *)0xffff0fc0) + +int atomic_add(volatile int *ptr, int val) +{ + int old, new; + + do { + old = *ptr; + new = old + val; + } while(__kuser_cmpxchg(old, new, ptr)); + + return new; +} + +注意: + + - 这个例程已根据需要包含了内存屏障。 + + - 仅在 __kuser_helper_version >= 2 时，此辅助代码存在 + （从内核版本 2.6.12 开始）。 + +kuser_memory_barrier +-------------------- + +位置: 0xffff0fa0 + +参考原型: + + void __kuser_memory_barrier(void); + +输入: + + lr = 返回地址 + +输出: + + 无 + +被篡改的寄存器: + + 无 + +定义: + + 应用于任何需要内存屏障以防止手动数据修改带来的一致性问题，以及 + __kuser_cmpxchg 中。 + +使用范例: + +typedef void (__kuser_dmb_t)(void); +#define __kuser_dmb (*(__kuser_dmb_t *)0xffff0fa0) + +注意: + + - 仅在 __kuser_helper_version >= 3 时，此辅助代码存在 + （从内核版本 2.6.15 开始）。 + +kuser_cmpxchg64 +--------------- + +位置: 0xffff0f60 + +参考原型: + + int __kuser_cmpxchg64(const int64_t *oldval, + const int64_t *newval, + volatile int64_t *ptr); + +输入: + + r0 = 指向 oldval + r1 = 指向 newval + r2 = 指向目标值 + lr = 返回地址 + +输出: + + r0 = 成功代码 (零或非零) + C flag = 如果 r0 == 0 则置 1，如果 r0 != 0 则清零。 + +被篡改的寄存器: + + r3, lr, flags + +定义: + + 仅在 *ptr 等于 *oldval 指向的 64 位值时，原子保存 *newval + 指向的 64 位值于 *ptr 中。如果 *ptr 被改变，则返回值为零， + 否则为非零值。 + + 如果 *ptr 被改变，则 C flag 也会被置 1，以实现调用代码中的汇编 + 优化。 + +使用范例: + +typedef int (__kuser_cmpxchg64_t)(const int64_t *oldval, + const int64_t *newval, + volatile int64_t *ptr); +#define __kuser_cmpxchg64 (*(__kuser_cmpxchg64_t *)0xffff0f60) + +int64_t atomic_add64(volatile int64_t *ptr, int64_t val) +{ + int64_t old, new; + + do { + old = *ptr; + new = old + val; + } while(__kuser_cmpxchg64(&old, &new, ptr)); + + return new; +} + +注意: + + - 这个例程已根据需要包含了内存屏障。 + + - 由于这个过程的代码长度（此辅助代码跨越 2 个常规的 kuser “槽”）， + 因此 0xffff0f80 不被作为有效的入口点。 + + - 仅在 __kuser_helper_version >= 5 时，此辅助代码存在 + （从内核版本 3.1 开始）。 diff --git a/Documentation/zh_CN/arm64/memory.txt b/Documentation/zh_CN/arm64/memory.txt index 83b519314706..a5f6283829f9 100644 --- a/Documentation/zh_CN/arm64/memory.txt +++ b/Documentation/zh_CN/arm64/memory.txt @@ -47,21 +47,21 @@ AArch64 Linux 内存布局： ----------------------------------------------------------------------- 0000000000000000 0000007fffffffff 512GB 用户空间 -ffffff8000000000 ffffffbbfffcffff ~240GB vmalloc +ffffff8000000000 ffffffbbfffeffff ~240GB vmalloc -ffffffbbfffd0000 ffffffbcfffdffff 64KB [防护页] +ffffffbbffff0000 ffffffbbffffffff 64KB [防护页] -ffffffbbfffe0000 ffffffbcfffeffff 64KB PCI I/O 空间 +ffffffbc00000000 ffffffbdffffffff 8GB vmemmap -ffffffbbffff0000 ffffffbcffffffff 64KB [防护页] +ffffffbe00000000 ffffffbffbbfffff ~8GB [防护页，未来用于 vmmemap] -ffffffbc00000000 ffffffbdffffffff 8GB vmemmap +ffffffbffbe00000 ffffffbffbe0ffff 64KB PCI I/O 空间 -ffffffbe00000000 ffffffbffbffffff ~8GB [防护页，未来用于 vmmemap] +ffffffbbffff0000 ffffffbcffffffff ~2MB [防护页] ffffffbffc000000 ffffffbfffffffff 64MB 模块 -ffffffc000000000 ffffffffffffffff 256GB 内存空间 +ffffffc000000000 ffffffffffffffff 256GB 内核逻辑内存映射 4KB 页大小的转换表查找： |
