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| author | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
| commit | fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 (patch) | |
| tree | 22962a4387943edc841c72a4e636a068c66d58fd /Documentation/ABI | |
| download | ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.zip ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.tar.gz | |
Initial import of modified Linux 2.6.28 tree
Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
Diffstat (limited to 'Documentation/ABI')
40 files changed, 2240 insertions, 0 deletions
diff --git a/Documentation/ABI/README b/Documentation/ABI/README new file mode 100644 index 0000000..9feaf16 --- /dev/null +++ b/Documentation/ABI/README @@ -0,0 +1,77 @@ +This directory attempts to document the ABI between the Linux kernel and +userspace, and the relative stability of these interfaces. Due to the +everchanging nature of Linux, and the differing maturity levels, these +interfaces should be used by userspace programs in different ways. + +We have four different levels of ABI stability, as shown by the four +different subdirectories in this location. Interfaces may change levels +of stability according to the rules described below. + +The different levels of stability are: + + stable/ + This directory documents the interfaces that the developer has + defined to be stable. Userspace programs are free to use these + interfaces with no restrictions, and backward compatibility for + them will be guaranteed for at least 2 years. Most interfaces + (like syscalls) are expected to never change and always be + available. + + testing/ + This directory documents interfaces that are felt to be stable, + as the main development of this interface has been completed. + The interface can be changed to add new features, but the + current interface will not break by doing this, unless grave + errors or security problems are found in them. Userspace + programs can start to rely on these interfaces, but they must be + aware of changes that can occur before these interfaces move to + be marked stable. Programs that use these interfaces are + strongly encouraged to add their name to the description of + these interfaces, so that the kernel developers can easily + notify them if any changes occur (see the description of the + layout of the files below for details on how to do this.) + + obsolete/ + This directory documents interfaces that are still remaining in + the kernel, but are marked to be removed at some later point in + time. The description of the interface will document the reason + why it is obsolete and when it can be expected to be removed. + The file Documentation/feature-removal-schedule.txt may describe + some of these interfaces, giving a schedule for when they will + be removed. + + removed/ + This directory contains a list of the old interfaces that have + been removed from the kernel. + +Every file in these directories will contain the following information: + +What: Short description of the interface +Date: Date created +KernelVersion: Kernel version this feature first showed up in. +Contact: Primary contact for this interface (may be a mailing list) +Description: Long description of the interface and how to use it. +Users: All users of this interface who wish to be notified when + it changes. This is very important for interfaces in + the "testing" stage, so that kernel developers can work + with userspace developers to ensure that things do not + break in ways that are unacceptable. It is also + important to get feedback for these interfaces to make + sure they are working in a proper way and do not need to + be changed further. + + +How things move between levels: + +Interfaces in stable may move to obsolete, as long as the proper +notification is given. + +Interfaces may be removed from obsolete and the kernel as long as the +documented amount of time has gone by. + +Interfaces in the testing state can move to the stable state when the +developers feel they are finished. They cannot be removed from the +kernel tree without going through the obsolete state first. + +It's up to the developer to place their interfaces in the category they +wish for it to start out in. diff --git a/Documentation/ABI/obsolete/dv1394 b/Documentation/ABI/obsolete/dv1394 new file mode 100644 index 0000000..2ee3686 --- /dev/null +++ b/Documentation/ABI/obsolete/dv1394 @@ -0,0 +1,9 @@ +What: dv1394 (a.k.a. "OHCI-DV I/O support" for FireWire) +Contact: linux1394-devel@lists.sourceforge.net +Description: + New application development should use raw1394 + userspace libraries + instead, notably libiec61883 which is functionally equivalent. + +Users: + ffmpeg/libavformat (used by a variety of media players) + dvgrab v1.x (replaced by dvgrab2 on top of raw1394 and resp. libraries) diff --git a/Documentation/ABI/obsolete/o2cb b/Documentation/ABI/obsolete/o2cb new file mode 100644 index 0000000..9c49d8e --- /dev/null +++ b/Documentation/ABI/obsolete/o2cb @@ -0,0 +1,11 @@ +What: /sys/o2cb symlink +Date: Dec 2005 +KernelVersion: 2.6.16 +Contact: ocfs2-devel@oss.oracle.com +Description: This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink will + be removed when new versions of ocfs2-tools which know to look + in /sys/fs/o2cb are sufficiently prevalent. Don't code new + software to look here, it should try /sys/fs/o2cb instead. + See Documentation/ABI/stable/o2cb for more information on usage. +Users: ocfs2-tools. It's sufficient to mail proposed changes to + ocfs2-devel@oss.oracle.com. diff --git a/Documentation/ABI/removed/devfs b/Documentation/ABI/removed/devfs new file mode 100644 index 0000000..8ffd28b --- /dev/null +++ b/Documentation/ABI/removed/devfs @@ -0,0 +1,12 @@ +What: devfs +Date: July 2005 (scheduled), finally removed in kernel v2.6.18 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + devfs has been unmaintained for a number of years, has unfixable + races, contains a naming policy within the kernel that is + against the LSB, and can be replaced by using udev. + The files fs/devfs/*, include/linux/devfs_fs*.h were removed, + along with the assorted devfs function calls throughout the + kernel tree. + +Users: diff --git a/Documentation/ABI/removed/raw1394_legacy_isochronous b/Documentation/ABI/removed/raw1394_legacy_isochronous new file mode 100644 index 0000000..1b62962 --- /dev/null +++ b/Documentation/ABI/removed/raw1394_legacy_isochronous @@ -0,0 +1,16 @@ +What: legacy isochronous ABI of raw1394 (1st generation iso ABI) +Date: June 2007 (scheduled), removed in kernel v2.6.23 +Contact: linux1394-devel@lists.sourceforge.net +Description: + The two request types RAW1394_REQ_ISO_SEND, RAW1394_REQ_ISO_LISTEN have + been deprecated for quite some time. They are very inefficient as they + come with high interrupt load and several layers of callbacks for each + packet. Because of these deficiencies, the video1394 and dv1394 drivers + and the 3rd-generation isochronous ABI in raw1394 (rawiso) were created. + +Users: + libraw1394 users via the long deprecated API raw1394_iso_write, + raw1394_start_iso_write, raw1394_start_iso_rcv, raw1394_stop_iso_rcv + + libdc1394, which optionally uses these old libraw1394 calls + alternatively to the more efficient video1394 ABI diff --git a/Documentation/ABI/stable/o2cb b/Documentation/ABI/stable/o2cb new file mode 100644 index 0000000..5eb1545 --- /dev/null +++ b/Documentation/ABI/stable/o2cb @@ -0,0 +1,10 @@ +What: /sys/fs/o2cb/ (was /sys/o2cb) +Date: Dec 2005 +KernelVersion: 2.6.16 +Contact: ocfs2-devel@oss.oracle.com +Description: Ocfs2-tools looks at 'interface-revision' for versioning + information. Each logmask/ file controls a set of debug prints + and can be written into with the strings "allow", "deny", or + "off". Reading the file returns the current state. +Users: ocfs2-tools. It's sufficient to mail proposed changes to + ocfs2-devel@oss.oracle.com. diff --git a/Documentation/ABI/stable/syscalls b/Documentation/ABI/stable/syscalls new file mode 100644 index 0000000..c3ae3e7 --- /dev/null +++ b/Documentation/ABI/stable/syscalls @@ -0,0 +1,10 @@ +What: The kernel syscall interface +Description: + This interface matches much of the POSIX interface and is based + on it and other Unix based interfaces. It will only be added to + over time, and not have things removed from it. + + Note that this interface is different for every architecture + that Linux supports. Please see the architecture-specific + documentation for details on the syscall numbers that are to be + mapped to each syscall. diff --git a/Documentation/ABI/stable/sysfs-class-ubi b/Documentation/ABI/stable/sysfs-class-ubi new file mode 100644 index 0000000..18d471d --- /dev/null +++ b/Documentation/ABI/stable/sysfs-class-ubi @@ -0,0 +1,212 @@ +What: /sys/class/ubi/ +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + The ubi/ class sub-directory belongs to the UBI subsystem and + provides general UBI information, per-UBI device information + and per-UBI volume information. + +What: /sys/class/ubi/version +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + This file contains version of the latest supported UBI on-media + format. Currently it is 1, and there is no plan to change this. + However, if in the future UBI needs on-flash format changes + which cannot be done in a compatible manner, a new format + version will be added. So this is a mechanism for possible + future backward-compatible (but forward-incompatible) + improvements. + +What: /sys/class/ubiX/ +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + The /sys/class/ubi0, /sys/class/ubi1, etc directories describe + UBI devices (UBI device 0, 1, etc). They contain general UBI + device information and per UBI volume information (each UBI + device may have many UBI volumes) + +What: /sys/class/ubi/ubiX/avail_eraseblocks +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Amount of available logical eraseblock. For example, one may + create a new UBI volume which has this amount of logical + eraseblocks. + +What: /sys/class/ubi/ubiX/bad_peb_count +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Count of bad physical eraseblocks on the underlying MTD device. + +What: /sys/class/ubi/ubiX/bgt_enabled +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Contains ASCII "0\n" if the UBI background thread is disabled, + and ASCII "1\n" if it is enabled. + +What: /sys/class/ubi/ubiX/dev +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Major and minor numbers of the character device corresponding + to this UBI device (in <major>:<minor> format). + +What: /sys/class/ubi/ubiX/eraseblock_size +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Maximum logical eraseblock size this UBI device may provide. UBI + volumes may have smaller logical eraseblock size because of their + alignment. + +What: /sys/class/ubi/ubiX/max_ec +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Maximum physical eraseblock erase counter value. + +What: /sys/class/ubi/ubiX/max_vol_count +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Maximum number of volumes which this UBI device may have. + +What: /sys/class/ubi/ubiX/min_io_size +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Minimum input/output unit size. All the I/O may only be done + in fractions of the contained number. + +What: /sys/class/ubi/ubiX/mtd_num +Date: January 2008 +KernelVersion: 2.6.25 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Number of the underlying MTD device. + +What: /sys/class/ubi/ubiX/reserved_for_bad +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Number of physical eraseblocks reserved for bad block handling. + +What: /sys/class/ubi/ubiX/total_eraseblocks +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Total number of good (not marked as bad) physical eraseblocks on + the underlying MTD device. + +What: /sys/class/ubi/ubiX/volumes_count +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Count of volumes on this UBI device. + +What: /sys/class/ubi/ubiX/ubiX_Y/ +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + The /sys/class/ubi/ubiX/ubiX_0/, /sys/class/ubi/ubiX/ubiX_1/, + etc directories describe UBI volumes on UBI device X (volumes + 0, 1, etc). + +What: /sys/class/ubi/ubiX/ubiX_Y/alignment +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Volume alignment - the value the logical eraseblock size of + this volume has to be aligned on. For example, 2048 means that + logical eraseblock size is multiple of 2048. In other words, + volume logical eraseblock size is UBI device logical eraseblock + size aligned to the alignment value. + +What: /sys/class/ubi/ubiX/ubiX_Y/corrupted +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Contains ASCII "0\n" if the UBI volume is OK, and ASCII "1\n" + if it is corrupted (e.g., due to an interrupted volume update). + +What: /sys/class/ubi/ubiX/ubiX_Y/data_bytes +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + The amount of data this volume contains. This value makes sense + only for static volumes, and for dynamic volume it equivalent + to the total volume size in bytes. + +What: /sys/class/ubi/ubiX/ubiX_Y/dev +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Major and minor numbers of the character device corresponding + to this UBI volume (in <major>:<minor> format). + +What: /sys/class/ubi/ubiX/ubiX_Y/name +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Volume name. + +What: /sys/class/ubi/ubiX/ubiX_Y/reserved_ebs +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Count of physical eraseblock reserved for this volume. + Equivalent to the volume size in logical eraseblocks. + +What: /sys/class/ubi/ubiX/ubiX_Y/type +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Volume type. Contains ASCII "dynamic\n" for dynamic volumes and + "static\n" for static volumes. + +What: /sys/class/ubi/ubiX/ubiX_Y/upd_marker +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Contains ASCII "0\n" if the update marker is not set for this + volume, and "1\n" if it is set. The update marker is set when + volume update starts, and cleaned when it ends. So the presence + of the update marker indicates that the volume is being updated + at the moment of the update was interrupted. The later may be + checked using the "corrupted" sysfs file. + +What: /sys/class/ubi/ubiX/ubiX_Y/usable_eb_size +Date: July 2006 +KernelVersion: 2.6.22 +Contact: Artem Bityutskiy <dedekind@infradead.org> +Description: + Logical eraseblock size of this volume. Equivalent to logical + eraseblock size of the device aligned on the volume alignment + value. diff --git a/Documentation/ABI/stable/sysfs-driver-usb-usbtmc b/Documentation/ABI/stable/sysfs-driver-usb-usbtmc new file mode 100644 index 0000000..9a75fb2 --- /dev/null +++ b/Documentation/ABI/stable/sysfs-driver-usb-usbtmc @@ -0,0 +1,62 @@ +What: /sys/bus/usb/drivers/usbtmc/devices/*/interface_capabilities +What: /sys/bus/usb/drivers/usbtmc/devices/*/device_capabilities +Date: August 2008 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + These files show the various USB TMC capabilities as described + by the device itself. The full description of the bitfields + can be found in the USB TMC documents from the USB-IF entitled + "Universal Serial Bus Test and Measurement Class Specification + (USBTMC) Revision 1.0" section 4.2.1.8. + + The files are read only. + + +What: /sys/bus/usb/drivers/usbtmc/devices/*/usb488_interface_capabilities +What: /sys/bus/usb/drivers/usbtmc/devices/*/usb488_device_capabilities +Date: August 2008 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + These files show the various USB TMC capabilities as described + by the device itself. The full description of the bitfields + can be found in the USB TMC documents from the USB-IF entitled + "Universal Serial Bus Test and Measurement Class, Subclass + USB488 Specification (USBTMC-USB488) Revision 1.0" section + 4.2.2. + + The files are read only. + + +What: /sys/bus/usb/drivers/usbtmc/devices/*/TermChar +Date: August 2008 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + This file is the TermChar value to be sent to the USB TMC + device as described by the document, "Universal Serial Bus Test + and Measurement Class Specification + (USBTMC) Revision 1.0" as published by the USB-IF. + + Note that the TermCharEnabled file determines if this value is + sent to the device or not. + + +What: /sys/bus/usb/drivers/usbtmc/devices/*/TermCharEnabled +Date: August 2008 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + This file determines if the TermChar is to be sent to the + device on every transaction or not. For more details about + this, please see the document, "Universal Serial Bus Test and + Measurement Class Specification (USBTMC) Revision 1.0" as + published by the USB-IF. + + +What: /sys/bus/usb/drivers/usbtmc/devices/*/auto_abort +Date: August 2008 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + This file determines if the the transaction of the USB TMC + device is to be automatically aborted if there is any error. + For more details about this, please see the document, + "Universal Serial Bus Test and Measurement Class Specification + (USBTMC) Revision 1.0" as published by the USB-IF. diff --git a/Documentation/ABI/stable/sysfs-module b/Documentation/ABI/stable/sysfs-module new file mode 100644 index 0000000..75be431 --- /dev/null +++ b/Documentation/ABI/stable/sysfs-module @@ -0,0 +1,30 @@ +What: /sys/module +Description: + The /sys/module tree consists of the following structure: + + /sys/module/MODULENAME + The name of the module that is in the kernel. This + module name will show up either if the module is built + directly into the kernel, or if it is loaded as a + dyanmic module. + + /sys/module/MODULENAME/parameters + This directory contains individual files that are each + individual parameters of the module that are able to be + changed at runtime. See the individual module + documentation as to the contents of these parameters and + what they accomplish. + + Note: The individual parameter names and values are not + considered stable, only the fact that they will be + placed in this location within sysfs. See the + individual driver documentation for details as to the + stability of the different parameters. + + /sys/module/MODULENAME/refcnt + If the module is able to be unloaded from the kernel, this file + will contain the current reference count of the module. + + Note: If the module is built into the kernel, or if the + CONFIG_MODULE_UNLOAD kernel configuration value is not enabled, + this file will not be present. diff --git a/Documentation/ABI/testing/debugfs-pktcdvd b/Documentation/ABI/testing/debugfs-pktcdvd new file mode 100644 index 0000000..bf9c16b --- /dev/null +++ b/Documentation/ABI/testing/debugfs-pktcdvd @@ -0,0 +1,19 @@ +What: /debug/pktcdvd/pktcdvd[0-7] +Date: Oct. 2006 +KernelVersion: 2.6.20 +Contact: Thomas Maier <balagi@justmail.de> +Description: + +debugfs interface +----------------- + +The pktcdvd module (packet writing driver) creates +these files in debugfs: + +/debug/pktcdvd/pktcdvd[0-7]/ + info (0444) Lots of driver statistics and infos. + +Example: +------- + +cat /debug/pktcdvd/pktcdvd0/info diff --git a/Documentation/ABI/testing/procfs-diskstats b/Documentation/ABI/testing/procfs-diskstats new file mode 100644 index 0000000..9923390 --- /dev/null +++ b/Documentation/ABI/testing/procfs-diskstats @@ -0,0 +1,22 @@ +What: /proc/diskstats +Date: February 2008 +Contact: Jerome Marchand <jmarchan@redhat.com> +Description: + The /proc/diskstats file displays the I/O statistics + of block devices. Each line contains the following 14 + fields: + 1 - major number + 2 - minor mumber + 3 - device name + 4 - reads completed succesfully + 5 - reads merged + 6 - sectors read + 7 - time spent reading (ms) + 8 - writes completed + 9 - writes merged + 10 - sectors written + 11 - time spent writing (ms) + 12 - I/Os currently in progress + 13 - time spent doing I/Os (ms) + 14 - weighted time spent doing I/Os (ms) + For more details refer to Documentation/iostats.txt diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block new file mode 100644 index 0000000..44f52a4 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-block @@ -0,0 +1,62 @@ +What: /sys/block/<disk>/stat +Date: February 2008 +Contact: Jerome Marchand <jmarchan@redhat.com> +Description: + The /sys/block/<disk>/stat files displays the I/O + statistics of disk <disk>. They contain 11 fields: + 1 - reads completed succesfully + 2 - reads merged + 3 - sectors read + 4 - time spent reading (ms) + 5 - writes completed + 6 - writes merged + 7 - sectors written + 8 - time spent writing (ms) + 9 - I/Os currently in progress + 10 - time spent doing I/Os (ms) + 11 - weighted time spent doing I/Os (ms) + For more details refer Documentation/iostats.txt + + +What: /sys/block/<disk>/<part>/stat +Date: February 2008 +Contact: Jerome Marchand <jmarchan@redhat.com> +Description: + The /sys/block/<disk>/<part>/stat files display the + I/O statistics of partition <part>. The format is the + same as the above-written /sys/block/<disk>/stat + format. + + +What: /sys/block/<disk>/integrity/format +Date: June 2008 +Contact: Martin K. Petersen <martin.petersen@oracle.com> +Description: + Metadata format for integrity capable block device. + E.g. T10-DIF-TYPE1-CRC. + + +What: /sys/block/<disk>/integrity/read_verify +Date: June 2008 +Contact: Martin K. Petersen <martin.petersen@oracle.com> +Description: + Indicates whether the block layer should verify the + integrity of read requests serviced by devices that + support sending integrity metadata. + + +What: /sys/block/<disk>/integrity/tag_size +Date: June 2008 +Contact: Martin K. Petersen <martin.petersen@oracle.com> +Description: + Number of bytes of integrity tag space available per + 512 bytes of data. + + +What: /sys/block/<disk>/integrity/write_generate +Date: June 2008 +Contact: Martin K. Petersen <martin.petersen@oracle.com> +Description: + Indicates whether the block layer should automatically + generate checksums for write requests bound for + devices that support receiving integrity metadata. diff --git a/Documentation/ABI/testing/sysfs-bus-css b/Documentation/ABI/testing/sysfs-bus-css new file mode 100644 index 0000000..b585ec2 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-css @@ -0,0 +1,35 @@ +What: /sys/bus/css/devices/.../type +Date: March 2008 +Contact: Cornelia Huck <cornelia.huck@de.ibm.com> + linux-s390@vger.kernel.org +Description: Contains the subchannel type, as reported by the hardware. + This attribute is present for all subchannel types. + +What: /sys/bus/css/devices/.../modalias +Date: March 2008 +Contact: Cornelia Huck <cornelia.huck@de.ibm.com> + linux-s390@vger.kernel.org +Description: Contains the module alias as reported with uevents. + It is of the format css:t<type> and present for all + subchannel types. + +What: /sys/bus/css/drivers/io_subchannel/.../chpids +Date: December 2002 +Contact: Cornelia Huck <cornelia.huck@de.ibm.com> + linux-s390@vger.kernel.org +Description: Contains the ids of the channel paths used by this + subchannel, as reported by the channel subsystem + during subchannel recognition. + Note: This is an I/O-subchannel specific attribute. +Users: s390-tools, HAL + +What: /sys/bus/css/drivers/io_subchannel/.../pimpampom +Date: December 2002 +Contact: Cornelia Huck <cornelia.huck@de.ibm.com> + linux-s390@vger.kernel.org +Description: Contains the PIM/PAM/POM values, as reported by the + channel subsystem when last queried by the common I/O + layer (this implies that this attribute is not neccessarily + in sync with the values current in the channel subsystem). + Note: This is an I/O-subchannel specific attribute. +Users: s390-tools, HAL diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci new file mode 100644 index 0000000..ceddcff --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-pci @@ -0,0 +1,11 @@ +What: /sys/bus/pci/devices/.../vpd +Date: February 2008 +Contact: Ben Hutchings <bhutchings@solarflare.com> +Description: + A file named vpd in a device directory will be a + binary file containing the Vital Product Data for the + device. It should follow the VPD format defined in + PCI Specification 2.1 or 2.2, but users should consider + that some devices may have malformatted data. If the + underlying VPD has a writable section then the + corresponding section of this file will be writable. diff --git a/Documentation/ABI/testing/sysfs-bus-umc b/Documentation/ABI/testing/sysfs-bus-umc new file mode 100644 index 0000000..948fec4 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-umc @@ -0,0 +1,28 @@ +What: /sys/bus/umc/ +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The Wireless Host Controller Interface (WHCI) + specification describes a PCI-based device with + multiple capabilities; the UWB Multi-interface + Controller (UMC). + + The umc bus presents each of the individual + capabilties as a device. + +What: /sys/bus/umc/devices/.../capability_id +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The ID of this capability, with 0 being the radio + controller capability. + +What: /sys/bus/umc/devices/.../version +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The specification version this capability's hardware + interface complies with. diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb new file mode 100644 index 0000000..7772928 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -0,0 +1,146 @@ +What: /sys/bus/usb/devices/.../power/autosuspend +Date: March 2007 +KernelVersion: 2.6.21 +Contact: Alan Stern <stern@rowland.harvard.edu> +Description: + Each USB device directory will contain a file named + power/autosuspend. This file holds the time (in seconds) + the device must be idle before it will be autosuspended. + 0 means the device will be autosuspended as soon as + possible. Negative values will prevent the device from + being autosuspended at all, and writing a negative value + will resume the device if it is already suspended. + + The autosuspend delay for newly-created devices is set to + the value of the usbcore.autosuspend module parameter. + +What: /sys/bus/usb/devices/.../power/level +Date: March 2007 +KernelVersion: 2.6.21 +Contact: Alan Stern <stern@rowland.harvard.edu> +Description: + Each USB device directory will contain a file named + power/level. This file holds a power-level setting for + the device, one of "on", "auto", or "suspend". + + "on" means that the device is not allowed to autosuspend, + although normal suspends for system sleep will still + be honored. "auto" means the device will autosuspend + and autoresume in the usual manner, according to the + capabilities of its driver. "suspend" means the device + is forced into a suspended state and it will not autoresume + in response to I/O requests. However remote-wakeup requests + from the device may still be enabled (the remote-wakeup + setting is controlled separately by the power/wakeup + attribute). + + During normal use, devices should be left in the "auto" + level. The other levels are meant for administrative uses. + If you want to suspend a device immediately but leave it + free to wake up in response to I/O requests, you should + write "0" to power/autosuspend. + +What: /sys/bus/usb/devices/.../power/persist +Date: May 2007 +KernelVersion: 2.6.23 +Contact: Alan Stern <stern@rowland.harvard.edu> +Description: + If CONFIG_USB_PERSIST is set, then each USB device directory + will contain a file named power/persist. The file holds a + boolean value (0 or 1) indicating whether or not the + "USB-Persist" facility is enabled for the device. Since the + facility is inherently dangerous, it is disabled by default + for all devices except hubs. For more information, see + Documentation/usb/persist.txt. + +What: /sys/bus/usb/device/.../power/connected_duration +Date: January 2008 +KernelVersion: 2.6.25 +Contact: Sarah Sharp <sarah.a.sharp@intel.com> +Description: + If CONFIG_PM and CONFIG_USB_SUSPEND are enabled, then this file + is present. When read, it returns the total time (in msec) + that the USB device has been connected to the machine. This + file is read-only. +Users: + PowerTOP <power@bughost.org> + http://www.lesswatts.org/projects/powertop/ + +What: /sys/bus/usb/device/.../power/active_duration +Date: January 2008 +KernelVersion: 2.6.25 +Contact: Sarah Sharp <sarah.a.sharp@intel.com> +Description: + If CONFIG_PM and CONFIG_USB_SUSPEND are enabled, then this file + is present. When read, it returns the total time (in msec) + that the USB device has been active, i.e. not in a suspended + state. This file is read-only. + + Tools can use this file and the connected_duration file to + compute the percentage of time that a device has been active. + For example, + echo $((100 * `cat active_duration` / `cat connected_duration`)) + will give an integer percentage. Note that this does not + account for counter wrap. +Users: + PowerTOP <power@bughost.org> + http://www.lesswatts.org/projects/powertop/ + +What: /sys/bus/usb/device/<busnum>-<devnum>...:<config num>-<interface num>/supports_autosuspend +Date: January 2008 +KernelVersion: 2.6.27 +Contact: Sarah Sharp <sarah.a.sharp@intel.com> +Description: + When read, this file returns 1 if the interface driver + for this interface supports autosuspend. It also + returns 1 if no driver has claimed this interface, as an + unclaimed interface will not stop the device from being + autosuspended if all other interface drivers are idle. + The file returns 0 if autosuspend support has not been + added to the driver. +Users: + USB PM tool + git://git.moblin.org/users/sarah/usb-pm-tool/ + +What: /sys/bus/usb/device/.../authorized +Date: July 2008 +KernelVersion: 2.6.26 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + Authorized devices are available for use by device + drivers, non-authorized one are not. By default, wired + USB devices are authorized. + + Certified Wireless USB devices are not authorized + initially and should be (by writing 1) after the + device has been authenticated. + +What: /sys/bus/usb/device/.../wusb_cdid +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + For Certified Wireless USB devices only. + + A devices's CDID, as 16 space-separated hex octets. + +What: /sys/bus/usb/device/.../wusb_ck +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + For Certified Wireless USB devices only. + + Write the device's connection key (CK) to start the + authentication of the device. The CK is 16 + space-separated hex octets. + +What: /sys/bus/usb/device/.../wusb_disconnect +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + For Certified Wireless USB devices only. + + Write a 1 to force the device to disconnect + (equivalent to unplugging a wired USB device). diff --git a/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg new file mode 100644 index 0000000..cb830df --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg @@ -0,0 +1,43 @@ +Where: /sys/bus/usb/.../powered +Date: August 2008 +Kernel Version: 2.6.26 +Contact: Harrison Metzger <harrisonmetz@gmail.com> +Description: Controls whether the device's display will powered. + A value of 0 is off and a non-zero value is on. + +Where: /sys/bus/usb/.../mode_msb +Where: /sys/bus/usb/.../mode_lsb +Date: August 2008 +Kernel Version: 2.6.26 +Contact: Harrison Metzger <harrisonmetz@gmail.com> +Description: Controls the devices display mode. + For a 6 character display the values are + MSB 0x06; LSB 0x3F, and + for an 8 character display the values are + MSB 0x08; LSB 0xFF. + +Where: /sys/bus/usb/.../textmode +Date: August 2008 +Kernel Version: 2.6.26 +Contact: Harrison Metzger <harrisonmetz@gmail.com> +Description: Controls the way the device interprets its text buffer. + raw: each character controls its segment manually + hex: each character is between 0-15 + ascii: each character is between '0'-'9' and 'A'-'F'. + +Where: /sys/bus/usb/.../text +Date: August 2008 +Kernel Version: 2.6.26 +Contact: Harrison Metzger <harrisonmetz@gmail.com> +Description: The text (or data) for the device to display + +Where: /sys/bus/usb/.../decimals +Date: August 2008 +Kernel Version: 2.6.26 +Contact: Harrison Metzger <harrisonmetz@gmail.com> +Description: Controls the decimal places on the device. + To set the nth decimal place, give this field + the value of 10 ** n. Assume this field has + the value k and has 1 or more decimal places set, + to set the mth place (where m is not already set), + change this fields value to k + 10 ** m.
\ No newline at end of file diff --git a/Documentation/ABI/testing/sysfs-c2port b/Documentation/ABI/testing/sysfs-c2port new file mode 100644 index 0000000..716cffc --- /dev/null +++ b/Documentation/ABI/testing/sysfs-c2port @@ -0,0 +1,88 @@ +What: /sys/class/c2port/ +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/ directory will contain files and + directories that will provide a unified interface to + the C2 port interface. + +What: /sys/class/c2port/c2portX +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/ directory is related to X-th + C2 port into the system. Each directory will contain files to + manage and control its C2 port. + +What: /sys/class/c2port/c2portX/access +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/access file enable the access + to the C2 port from the system. No commands can be sent + till this entry is set to 0. + +What: /sys/class/c2port/c2portX/dev_id +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/dev_id file show the device ID + of the connected micro. + +What: /sys/class/c2port/c2portX/flash_access +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/flash_access file enable the + access to the on-board flash of the connected micro. + No commands can be sent till this entry is set to 0. + +What: /sys/class/c2port/c2portX/flash_block_size +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/flash_block_size file show + the on-board flash block size of the connected micro. + +What: /sys/class/c2port/c2portX/flash_blocks_num +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/flash_blocks_num file show + the on-board flash blocks number of the connected micro. + +What: /sys/class/c2port/c2portX/flash_data +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/flash_data file export + the content of the on-board flash of the connected micro. + +What: /sys/class/c2port/c2portX/flash_erase +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/flash_erase file execute + the "erase" command on the on-board flash of the connected + micro. + +What: /sys/class/c2port/c2portX/flash_erase +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/flash_erase file show the + on-board flash size of the connected micro. + +What: /sys/class/c2port/c2portX/reset +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/reset file execute a "reset" + command on the connected micro. + +What: /sys/class/c2port/c2portX/rev_id +Date: October 2008 +Contact: Rodolfo Giometti <giometti@linux.it> +Description: + The /sys/class/c2port/c2portX/rev_id file show the revision ID + of the connected micro. diff --git a/Documentation/ABI/testing/sysfs-class b/Documentation/ABI/testing/sysfs-class new file mode 100644 index 0000000..4b0cb89 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class @@ -0,0 +1,16 @@ +What: /sys/class/ +Date: Febuary 2006 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + The /sys/class directory will consist of a group of + subdirectories describing individual classes of devices + in the kernel. The individual directories will consist + of either subdirectories, or symlinks to other + directories. + + All programs that use this directory tree must be able + to handle both subdirectories or symlinks in order to + work properly. + +Users: + udev <linux-hotplug-devel@lists.sourceforge.net> diff --git a/Documentation/ABI/testing/sysfs-class-bdi b/Documentation/ABI/testing/sysfs-class-bdi new file mode 100644 index 0000000..5f50097 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-bdi @@ -0,0 +1,50 @@ +What: /sys/class/bdi/<bdi>/ +Date: January 2008 +Contact: Peter Zijlstra <a.p.zijlstra@chello.nl> +Description: + +Provide a place in sysfs for the backing_dev_info object. This allows +setting and retrieving various BDI specific variables. + +The <bdi> identifier can be either of the following: + +MAJOR:MINOR + + Device number for block devices, or value of st_dev on + non-block filesystems which provide their own BDI, such as NFS + and FUSE. + +MAJOR:MINOR-fuseblk + + Value of st_dev on fuseblk filesystems. + +default + + The default backing dev, used for non-block device backed + filesystems which do not provide their own BDI. + +Files under /sys/class/bdi/<bdi>/ +--------------------------------- + +read_ahead_kb (read-write) + + Size of the read-ahead window in kilobytes + +min_ratio (read-write) + + Under normal circumstances each device is given a part of the + total write-back cache that relates to its current average + writeout speed in relation to the other devices. + + The 'min_ratio' parameter allows assigning a minimum + percentage of the write-back cache to a particular device. + For example, this is useful for providing a minimum QoS. + +max_ratio (read-write) + + Allows limiting a particular device to use not more than the + given percentage of the write-back cache. This is useful in + situations where we want to avoid one device taking all or + most of the write-back cache. For example in case of an NFS + mount that is prone to get stuck, or a FUSE mount which cannot + be trusted to play fair. diff --git a/Documentation/ABI/testing/sysfs-class-pktcdvd b/Documentation/ABI/testing/sysfs-class-pktcdvd new file mode 100644 index 0000000..b1c3f02 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-pktcdvd @@ -0,0 +1,72 @@ +What: /sys/class/pktcdvd/ +Date: Oct. 2006 +KernelVersion: 2.6.20 +Contact: Thomas Maier <balagi@justmail.de> +Description: + +sysfs interface +--------------- + +The pktcdvd module (packet writing driver) creates +these files in the sysfs: +(<devid> is in format major:minor ) + +/sys/class/pktcdvd/ + add (0200) Write a block device id (major:minor) + to create a new pktcdvd device and map + it to the block device. + + remove (0200) Write the pktcdvd device id (major:minor) + to it to remove the pktcdvd device. + + device_map (0444) Shows the device mapping in format: + pktcdvd[0-7] <pktdevid> <blkdevid> + +/sys/class/pktcdvd/pktcdvd[0-7]/ + dev (0444) Device id + uevent (0200) To send an uevent. + +/sys/class/pktcdvd/pktcdvd[0-7]/stat/ + packets_started (0444) Number of started packets. + packets_finished (0444) Number of finished packets. + + kb_written (0444) kBytes written. + kb_read (0444) kBytes read. + kb_read_gather (0444) kBytes read to fill write packets. + + reset (0200) Write any value to it to reset + pktcdvd device statistic values, like + bytes read/written. + +/sys/class/pktcdvd/pktcdvd[0-7]/write_queue/ + size (0444) Contains the size of the bio write + queue. + + congestion_off (0644) If bio write queue size is below + this mark, accept new bio requests + from the block layer. + + congestion_on (0644) If bio write queue size is higher + as this mark, do no longer accept + bio write requests from the block + layer and wait till the pktcdvd + device has processed enough bio's + so that bio write queue size is + below congestion off mark. + A value of <= 0 disables congestion + control. + + +Example: +-------- +To use the pktcdvd sysfs interface directly, you can do: + +# create a new pktcdvd device mapped to /dev/hdc +echo "22:0" >/sys/class/pktcdvd/add +cat /sys/class/pktcdvd/device_map +# assuming device pktcdvd0 was created, look at stat's +cat /sys/class/pktcdvd/pktcdvd0/stat/kb_written +# print the device id of the mapped block device +fgrep pktcdvd0 /sys/class/pktcdvd/device_map +# remove device, using pktcdvd0 device id 253:0 +echo "253:0" >/sys/class/pktcdvd/remove diff --git a/Documentation/ABI/testing/sysfs-class-regulator b/Documentation/ABI/testing/sysfs-class-regulator new file mode 100644 index 0000000..3731f6f --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-regulator @@ -0,0 +1,328 @@ +What: /sys/class/regulator/.../state +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + state. This holds the regulator output state. + + This will be one of the following strings: + + 'enabled' + 'disabled' + 'unknown' + + 'enabled' means the regulator output is ON and is supplying + power to the system. + + 'disabled' means the regulator output is OFF and is not + supplying power to the system.. + + 'unknown' means software cannot determine the state. + + NOTE: this field can be used in conjunction with microvolts + and microamps to determine regulator output levels. + + +What: /sys/class/regulator/.../type +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + type. This holds the regulator type. + + This will be one of the following strings: + + 'voltage' + 'current' + 'unknown' + + 'voltage' means the regulator output voltage can be controlled + by software. + + 'current' means the regulator output current limit can be + controlled by software. + + 'unknown' means software cannot control either voltage or + current limit. + + +What: /sys/class/regulator/.../microvolts +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + microvolts. This holds the regulator output voltage setting + measured in microvolts (i.e. E-6 Volts). + + NOTE: This value should not be used to determine the regulator + output voltage level as this value is the same regardless of + whether the regulator is enabled or disabled. + + +What: /sys/class/regulator/.../microamps +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + microamps. This holds the regulator output current limit + setting measured in microamps (i.e. E-6 Amps). + + NOTE: This value should not be used to determine the regulator + output current level as this value is the same regardless of + whether the regulator is enabled or disabled. + + +What: /sys/class/regulator/.../opmode +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + opmode. This holds the regulator operating mode setting. + + The opmode value can be one of the following strings: + + 'fast' + 'normal' + 'idle' + 'standby' + 'unknown' + + The modes are described in include/linux/regulator/regulator.h + + NOTE: This value should not be used to determine the regulator + output operating mode as this value is the same regardless of + whether the regulator is enabled or disabled. + + +What: /sys/class/regulator/.../min_microvolts +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + min_microvolts. This holds the minimum safe working regulator + output voltage setting for this domain measured in microvolts. + + NOTE: this will return the string 'constraint not defined' if + the power domain has no min microvolts constraint defined by + platform code. + + +What: /sys/class/regulator/.../max_microvolts +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + max_microvolts. This holds the maximum safe working regulator + output voltage setting for this domain measured in microvolts. + + NOTE: this will return the string 'constraint not defined' if + the power domain has no max microvolts constraint defined by + platform code. + + +What: /sys/class/regulator/.../min_microamps +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + min_microamps. This holds the minimum safe working regulator + output current limit setting for this domain measured in + microamps. + + NOTE: this will return the string 'constraint not defined' if + the power domain has no min microamps constraint defined by + platform code. + + +What: /sys/class/regulator/.../max_microamps +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + max_microamps. This holds the maximum safe working regulator + output current limit setting for this domain measured in + microamps. + + NOTE: this will return the string 'constraint not defined' if + the power domain has no max microamps constraint defined by + platform code. + + +What: /sys/class/regulator/.../name +Date: October 2008 +KernelVersion: 2.6.28 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + name. This holds a string identifying the regulator for + display purposes. + + NOTE: this will be empty if no suitable name is provided + by platform or regulator drivers. + + +What: /sys/class/regulator/.../num_users +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + num_users. This holds the number of consumer devices that + have called regulator_enable() on this regulator. + + +What: /sys/class/regulator/.../requested_microamps +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + requested_microamps. This holds the total requested load + current in microamps for this regulator from all its consumer + devices. + + +What: /sys/class/regulator/.../parent +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Some regulator directories will contain a link called parent. + This points to the parent or supply regulator if one exists. + +What: /sys/class/regulator/.../suspend_mem_microvolts +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_mem_microvolts. This holds the regulator output + voltage setting for this domain measured in microvolts when + the system is suspended to memory. + + NOTE: this will return the string 'not defined' if + the power domain has no suspend to memory voltage defined by + platform code. + +What: /sys/class/regulator/.../suspend_disk_microvolts +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_disk_microvolts. This holds the regulator output + voltage setting for this domain measured in microvolts when + the system is suspended to disk. + + NOTE: this will return the string 'not defined' if + the power domain has no suspend to disk voltage defined by + platform code. + +What: /sys/class/regulator/.../suspend_standby_microvolts +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_standby_microvolts. This holds the regulator output + voltage setting for this domain measured in microvolts when + the system is suspended to standby. + + NOTE: this will return the string 'not defined' if + the power domain has no suspend to standby voltage defined by + platform code. + +What: /sys/class/regulator/.../suspend_mem_mode +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_mem_mode. This holds the regulator operating mode + setting for this domain when the system is suspended to + memory. + + NOTE: this will return the string 'not defined' if + the power domain has no suspend to memory mode defined by + platform code. + +What: /sys/class/regulator/.../suspend_disk_mode +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_disk_mode. This holds the regulator operating mode + setting for this domain when the system is suspended to disk. + + NOTE: this will return the string 'not defined' if + the power domain has no suspend to disk mode defined by + platform code. + +What: /sys/class/regulator/.../suspend_standby_mode +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_standby_mode. This holds the regulator operating mode + setting for this domain when the system is suspended to + standby. + + NOTE: this will return the string 'not defined' if + the power domain has no suspend to standby mode defined by + platform code. + +What: /sys/class/regulator/.../suspend_mem_state +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_mem_state. This holds the regulator operating state + when suspended to memory. + + This will be one of the following strings: + + 'enabled' + 'disabled' + 'not defined' + +What: /sys/class/regulator/.../suspend_disk_state +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_disk_state. This holds the regulator operating state + when suspended to disk. + + This will be one of the following strings: + + 'enabled' + 'disabled' + 'not defined' + +What: /sys/class/regulator/.../suspend_standby_state +Date: May 2008 +KernelVersion: 2.6.26 +Contact: Liam Girdwood <lrg@slimlogic.co.uk> +Description: + Each regulator directory will contain a field called + suspend_standby_state. This holds the regulator operating + state when suspended to standby. + + This will be one of the following strings: + + 'enabled' + 'disabled' + 'not defined' diff --git a/Documentation/ABI/testing/sysfs-class-usb_host b/Documentation/ABI/testing/sysfs-class-usb_host new file mode 100644 index 0000000..46b66ad --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-usb_host @@ -0,0 +1,25 @@ +What: /sys/class/usb_host/usb_hostN/wusb_chid +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + Write the CHID (16 space-separated hex octets) for this host controller. + This starts the host controller, allowing it to accept connection from + WUSB devices. + + Set an all zero CHID to stop the host controller. + +What: /sys/class/usb_host/usb_hostN/wusb_trust_timeout +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + Devices that haven't sent a WUSB packet to the host + within 'wusb_trust_timeout' ms are considered to have + disconnected and are removed. The default value of + 4000 ms is the value required by the WUSB + specification. + + Since this relates to security (specifically, the + lifetime of PTKs and GTKs) it should not be changed + from the default. diff --git a/Documentation/ABI/testing/sysfs-class-uwb_rc b/Documentation/ABI/testing/sysfs-class-uwb_rc new file mode 100644 index 0000000..a0d18db --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-uwb_rc @@ -0,0 +1,144 @@ +What: /sys/class/uwb_rc +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + Interfaces for WiMedia Ultra Wideband Common Radio + Platform (UWB) radio controllers. + + Familiarity with the ECMA-368 'High Rate Ultra + Wideband MAC and PHY Specification' is assumed. + +What: /sys/class/uwb_rc/beacon_timeout_ms +Date: July 2008 +KernelVersion: 2.6.27 +Description: + If no beacons are received from a device for at least + this time, the device will be considered to have gone + and it will be removed. The default is 3 superframes + (~197 ms) as required by the specification. + +What: /sys/class/uwb_rc/uwbN/ +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + An individual UWB radio controller. + +What: /sys/class/uwb_rc/uwbN/beacon +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + Write: + + <channel> [<bpst offset>] + + to start beaconing on a specific channel, or stop + beaconing if <channel> is -1. Valid channels depends + on the radio controller's supported band groups. + + <bpst offset> may be used to try and join a specific + beacon group if more than one was found during a scan. + +What: /sys/class/uwb_rc/uwbN/scan +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + Write: + + <channel> <type> [<bpst offset>] + + to start (or stop) scanning on a channel. <type> is one of: + 0 - scan + 1 - scan outside BP + 2 - scan while inactive + 3 - scanning disabled + 4 - scan (with start time of <bpst offset>) + +What: /sys/class/uwb_rc/uwbN/mac_address +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + The EUI-48, in colon-separated hex octets, for this + radio controller. A write will change the radio + controller's EUI-48 but only do so while the device is + not beaconing or scanning. + +What: /sys/class/uwb_rc/uwbN/wusbhc +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + A symlink to the device (if any) of the WUSB Host + Controller PAL using this radio controller. + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/ +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + A neighbour UWB device that has either been detected + as part of a scan or is a member of the radio + controllers beacon group. + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/BPST +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + The time (using the radio controllers internal 1 ms + interval superframe timer) of the last beacon from + this device was received. + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/DevAddr +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + The current DevAddr of this device in colon separated + hex octets. + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/EUI_48 +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + + The EUI-48 of this device in colon separated hex + octets. + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/BPST +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/IEs +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + The latest IEs included in this device's beacon, in + space separated hex octets with one IE per line. + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/LQE +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + Link Quality Estimate - the Signal to Noise Ratio + (SNR) of all packets received from this device in dB. + This gives an estimate on a suitable PHY rate. Refer + to [ECMA-368] section 13.3 for more details. + +What: /sys/class/uwb_rc/uwbN/<EUI-48>/RSSI +Date: July 2008 +KernelVersion: 2.6.27 +Contact: linux-usb@vger.kernel.org +Description: + Received Signal Strength Indication - the strength of + the received signal in dB. LQE is a more useful + measure of the radio link quality. diff --git a/Documentation/ABI/testing/sysfs-dev b/Documentation/ABI/testing/sysfs-dev new file mode 100644 index 0000000..a9f2b8b --- /dev/null +++ b/Documentation/ABI/testing/sysfs-dev @@ -0,0 +1,20 @@ +What: /sys/dev +Date: April 2008 +KernelVersion: 2.6.26 +Contact: Dan Williams <dan.j.williams@intel.com> +Description: The /sys/dev tree provides a method to look up the sysfs + path for a device using the information returned from + stat(2). There are two directories, 'block' and 'char', + beneath /sys/dev containing symbolic links with names of + the form "<major>:<minor>". These links point to the + corresponding sysfs path for the given device. + + Example: + $ readlink /sys/dev/block/8:32 + ../../block/sdc + + Entries in /sys/dev/char and /sys/dev/block will be + dynamically created and destroyed as devices enter and + leave the system. + +Users: mdadm <linux-raid@vger.kernel.org> diff --git a/Documentation/ABI/testing/sysfs-devices b/Documentation/ABI/testing/sysfs-devices new file mode 100644 index 0000000..6a25671 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices @@ -0,0 +1,25 @@ +What: /sys/devices +Date: February 2006 +Contact: Greg Kroah-Hartman <gregkh@suse.de> +Description: + The /sys/devices tree contains a snapshot of the + internal state of the kernel device tree. Devices will + be added and removed dynamically as the machine runs, + and between different kernel versions, the layout of the + devices within this tree will change. + + Please do not rely on the format of this tree because of + this. If a program wishes to find different things in + the tree, please use the /sys/class structure and rely + on the symlinks there to point to the proper location + within the /sys/devices tree of the individual devices. + Or rely on the uevent messages to notify programs of + devices being added and removed from this tree to find + the location of those devices. + + Note that sometimes not all devices along the directory + chain will have emitted uevent messages, so userspace + programs must be able to handle such occurrences. + +Users: + udev <linux-hotplug-devel@lists.sourceforge.net> diff --git a/Documentation/ABI/testing/sysfs-devices-memory b/Documentation/ABI/testing/sysfs-devices-memory new file mode 100644 index 0000000..7a16fe1 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-memory @@ -0,0 +1,24 @@ +What: /sys/devices/system/memory +Date: June 2008 +Contact: Badari Pulavarty <pbadari@us.ibm.com> +Description: + The /sys/devices/system/memory contains a snapshot of the + internal state of the kernel memory blocks. Files could be + added or removed dynamically to represent hot-add/remove + operations. + +Users: hotplug memory add/remove tools + https://w3.opensource.ibm.com/projects/powerpc-utils/ + +What: /sys/devices/system/memory/memoryX/removable +Date: June 2008 +Contact: Badari Pulavarty <pbadari@us.ibm.com> +Description: + The file /sys/devices/system/memory/memoryX/removable + indicates whether this memory block is removable or not. + This is useful for a user-level agent to determine + identify removable sections of the memory before attempting + potentially expensive hot-remove memory operation + +Users: hotplug memory remove tools + https://w3.opensource.ibm.com/projects/powerpc-utils/ diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi new file mode 100644 index 0000000..e8ffc70 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-acpi @@ -0,0 +1,146 @@ +What: /sys/firmware/acpi/interrupts/ +Date: February 2008 +Contact: Len Brown <lenb@kernel.org> +Description: + All ACPI interrupts are handled via a single IRQ, + the System Control Interrupt (SCI), which appears + as "acpi" in /proc/interrupts. + + However, one of the main functions of ACPI is to make + the platform understand random hardware without + special driver support. So while the SCI handles a few + well known (fixed feature) interrupts sources, such + as the power button, it can also handle a variable + number of a "General Purpose Events" (GPE). + + A GPE vectors to a specified handler in AML, which + can do a anything the BIOS writer wants from + OS context. GPE 0x12, for example, would vector + to a level or edge handler called _L12 or _E12. + The handler may do its business and return. + Or the handler may send send a Notify event + to a Linux device driver registered on an ACPI device, + such as a battery, or a processor. + + To figure out where all the SCI's are coming from, + /sys/firmware/acpi/interrupts contains a file listing + every possible source, and the count of how many + times it has triggered. + + $ cd /sys/firmware/acpi/interrupts + $ grep . * + error: 0 + ff_gbl_lock: 0 enable + ff_pmtimer: 0 invalid + ff_pwr_btn: 0 enable + ff_rt_clk: 2 disable + ff_slp_btn: 0 invalid + gpe00: 0 invalid + gpe01: 0 enable + gpe02: 108 enable + gpe03: 0 invalid + gpe04: 0 invalid + gpe05: 0 invalid + gpe06: 0 enable + gpe07: 0 enable + gpe08: 0 invalid + gpe09: 0 invalid + gpe0A: 0 invalid + gpe0B: 0 invalid + gpe0C: 0 invalid + gpe0D: 0 invalid + gpe0E: 0 invalid + gpe0F: 0 invalid + gpe10: 0 invalid + gpe11: 0 invalid + gpe12: 0 invalid + gpe13: 0 invalid + gpe14: 0 invalid + gpe15: 0 invalid + gpe16: 0 invalid + gpe17: 1084 enable + gpe18: 0 enable + gpe19: 0 invalid + gpe1A: 0 invalid + gpe1B: 0 invalid + gpe1C: 0 invalid + gpe1D: 0 invalid + gpe1E: 0 invalid + gpe1F: 0 invalid + gpe_all: 1192 + sci: 1194 + + sci - The total number of times the ACPI SCI + has claimed an interrupt. + + gpe_all - count of SCI caused by GPEs. + + gpeXX - count for individual GPE source + + ff_gbl_lock - Global Lock + + ff_pmtimer - PM Timer + + ff_pwr_btn - Power Button + + ff_rt_clk - Real Time Clock + + ff_slp_btn - Sleep Button + + error - an interrupt that can't be accounted for above. + + invalid: it's either a GPE or a Fixed Event that + doesn't have an event handler. + + disable: the GPE/Fixed Event is valid but disabled. + + enable: the GPE/Fixed Event is valid and enabled. + + Root has permission to clear any of these counters. Eg. + # echo 0 > gpe11 + + All counters can be cleared by clearing the total "sci": + # echo 0 > sci + + None of these counters has an effect on the function + of the system, they are simply statistics. + + Besides this, user can also write specific strings to these files + to enable/disable/clear ACPI interrupts in user space, which can be + used to debug some ACPI interrupt storm issues. + + Note that only writting to VALID GPE/Fixed Event is allowed, + i.e. user can only change the status of runtime GPE and + Fixed Event with event handler installed. + + Let's take power button fixed event for example, please kill acpid + and other user space applications so that the machine won't shutdown + when pressing the power button. + # cat ff_pwr_btn + 0 enabled + # press the power button for 3 times; + # cat ff_pwr_btn + 3 enabled + # echo disable > ff_pwr_btn + # cat ff_pwr_btn + 3 disabled + # press the power button for 3 times; + # cat ff_pwr_btn + 3 disabled + # echo enable > ff_pwr_btn + # cat ff_pwr_btn + 4 enabled + /* + * this is because the status bit is set even if the enable bit is cleared, + * and it triggers an ACPI fixed event when the enable bit is set again + */ + # press the power button for 3 times; + # cat ff_pwr_btn + 7 enabled + # echo disable > ff_pwr_btn + # press the power button for 3 times; + # echo clear > ff_pwr_btn /* clear the status bit */ + # echo disable > ff_pwr_btn + # cat ff_pwr_btn + 7 enabled + diff --git a/Documentation/ABI/testing/sysfs-firmware-memmap b/Documentation/ABI/testing/sysfs-firmware-memmap new file mode 100644 index 0000000..0d99ee6 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-memmap @@ -0,0 +1,71 @@ +What: /sys/firmware/memmap/ +Date: June 2008 +Contact: Bernhard Walle <bwalle@suse.de> +Description: + On all platforms, the firmware provides a memory map which the + kernel reads. The resources from that memory map are registered + in the kernel resource tree and exposed to userspace via + /proc/iomem (together with other resources). + + However, on most architectures that firmware-provided memory + map is modified afterwards by the kernel itself, either because + the kernel merges that memory map with other information or + just because the user overwrites that memory map via command + line. + + kexec needs the raw firmware-provided memory map to setup the + parameter segment of the kernel that should be booted with + kexec. Also, the raw memory map is useful for debugging. For + that reason, /sys/firmware/memmap is an interface that provides + the raw memory map to userspace. + + The structure is as follows: Under /sys/firmware/memmap there + are subdirectories with the number of the entry as their name: + + /sys/firmware/memmap/0 + /sys/firmware/memmap/1 + /sys/firmware/memmap/2 + /sys/firmware/memmap/3 + ... + + The maximum depends on the number of memory map entries provided + by the firmware. The order is just the order that the firmware + provides. + + Each directory contains three files: + + start : The start address (as hexadecimal number with the + '0x' prefix). + end : The end address, inclusive (regardless whether the + firmware provides inclusive or exclusive ranges). + type : Type of the entry as string. See below for a list of + valid types. + + So, for example: + + /sys/firmware/memmap/0/start + /sys/firmware/memmap/0/end + /sys/firmware/memmap/0/type + /sys/firmware/memmap/1/start + ... + + Currently following types exist: + + - System RAM + - ACPI Tables + - ACPI Non-volatile Storage + - reserved + + Following shell snippet can be used to display that memory + map in a human-readable format: + + -------------------- 8< ---------------------------------------- + #!/bin/bash + cd /sys/firmware/memmap + for dir in * ; do + start=$(cat $dir/start) + end=$(cat $dir/end) + type=$(cat $dir/type) + printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type" + done + -------------------- >8 ---------------------------------------- diff --git a/Documentation/ABI/testing/sysfs-firmware-sgi_uv b/Documentation/ABI/testing/sysfs-firmware-sgi_uv new file mode 100644 index 0000000..4573fd4 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-sgi_uv @@ -0,0 +1,27 @@ +What: /sys/firmware/sgi_uv/ +Date: August 2008 +Contact: Russ Anderson <rja@sgi.com> +Description: + The /sys/firmware/sgi_uv directory contains information + about the SGI UV platform. + + Under that directory are a number of files: + + partition_id + coherence_id + + The partition_id entry contains the partition id. + SGI UV systems can be partitioned into multiple physical + machines, which each partition running a unique copy + of the operating system. Each partition will have a unique + partition id. To display the partition id, use the command: + + cat /sys/firmware/sgi_uv/partition_id + + The coherence_id entry contains the coherence id. + A partitioned SGI UV system can have one or more coherence + domain. The coherence id indicates which coherence domain + this partition is in. To display the coherence id, use the + command: + + cat /sys/firmware/sgi_uv/coherence_id diff --git a/Documentation/ABI/testing/sysfs-gpio b/Documentation/ABI/testing/sysfs-gpio new file mode 100644 index 0000000..8aab809 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-gpio @@ -0,0 +1,26 @@ +What: /sys/class/gpio/ +Date: July 2008 +KernelVersion: 2.6.27 +Contact: David Brownell <dbrownell@users.sourceforge.net> +Description: + + As a Kconfig option, individual GPIO signals may be accessed from + userspace. GPIOs are only made available to userspace by an explicit + "export" operation. If a given GPIO is not claimed for use by + kernel code, it may be exported by userspace (and unexported later). + Kernel code may export it for complete or partial access. + + GPIOs are identified as they are inside the kernel, using integers in + the range 0..INT_MAX. See Documentation/gpio.txt for more information. + + /sys/class/gpio + /export ... asks the kernel to export a GPIO to userspace + /unexport ... to return a GPIO to the kernel + /gpioN ... for each exported GPIO #N + /value ... always readable, writes fail for input GPIOs + /direction ... r/w as: in, out (default low); write: high, low + /gpiochipN ... for each gpiochip; #N is its first GPIO + /base ... (r/o) same as N + /label ... (r/o) descriptive, not necessarily unique + /ngpio ... (r/o) number of GPIOs; numbered N to N + (ngpio - 1) + diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft new file mode 100644 index 0000000..c2b7d11 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-ibft @@ -0,0 +1,23 @@ +What: /sys/firmware/ibft/initiator +Date: November 2007 +Contact: Konrad Rzeszutek <ketuzsezr@darnok.org> +Description: The /sys/firmware/ibft/initiator directory will contain + files that expose the iSCSI Boot Firmware Table initiator data. + Usually this contains the Initiator name. + +What: /sys/firmware/ibft/targetX +Date: November 2007 +Contact: Konrad Rzeszutek <ketuzsezr@darnok.org> +Description: The /sys/firmware/ibft/targetX directory will contain + files that expose the iSCSI Boot Firmware Table target data. + Usually this contains the target's IP address, boot LUN, + target name, and what NIC it is associated with. It can also + contain the CHAP name (and password), the reverse CHAP + name (and password) + +What: /sys/firmware/ibft/ethernetX +Date: November 2007 +Contact: Konrad Rzeszutek <ketuzsezr@darnok.org> +Description: The /sys/firmware/ibft/ethernetX directory will contain + files that expose the iSCSI Boot Firmware Table NIC data. + This can this can the IP address, MAC, and gateway of the NIC. diff --git a/Documentation/ABI/testing/sysfs-kernel-mm b/Documentation/ABI/testing/sysfs-kernel-mm new file mode 100644 index 0000000..190d523 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-kernel-mm @@ -0,0 +1,6 @@ +What: /sys/kernel/mm +Date: July 2008 +Contact: Nishanth Aravamudan <nacc@us.ibm.com>, VM maintainers +Description: + /sys/kernel/mm/ should contain any and all VM + related information in /sys/kernel/. diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-hugepages b/Documentation/ABI/testing/sysfs-kernel-mm-hugepages new file mode 100644 index 0000000..e21c005 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-kernel-mm-hugepages @@ -0,0 +1,15 @@ +What: /sys/kernel/mm/hugepages/ +Date: June 2008 +Contact: Nishanth Aravamudan <nacc@us.ibm.com>, hugetlb maintainers +Description: + /sys/kernel/mm/hugepages/ contains a number of subdirectories + of the form hugepages-<size>kB, where <size> is the page size + of the hugepages supported by the kernel/CPU combination. + + Under these directories are a number of files: + nr_hugepages + nr_overcommit_hugepages + free_hugepages + surplus_hugepages + resv_hugepages + See Documentation/vm/hugetlbpage.txt for details. diff --git a/Documentation/ABI/testing/sysfs-kernel-uids b/Documentation/ABI/testing/sysfs-kernel-uids new file mode 100644 index 0000000..28f1469 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-kernel-uids @@ -0,0 +1,14 @@ +What: /sys/kernel/uids/<uid>/cpu_shares +Date: December 2007 +Contact: Dhaval Giani <dhaval@linux.vnet.ibm.com> + Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> +Description: + The /sys/kernel/uids/<uid>/cpu_shares tunable is used + to set the cpu bandwidth a user is allowed. This is a + propotional value. What that means is that if there + are two users logged in, each with an equal number of + shares, then they will get equal CPU bandwidth. Another + example would be, if User A has shares = 1024 and user + B has shares = 2048, User B will get twice the CPU + bandwidth user A will. For more details refer + Documentation/scheduler/sched-design-CFS.txt diff --git a/Documentation/ABI/testing/sysfs-ocfs2 b/Documentation/ABI/testing/sysfs-ocfs2 new file mode 100644 index 0000000..b7cc516 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-ocfs2 @@ -0,0 +1,89 @@ +What: /sys/fs/ocfs2/ +Date: April 2008 +Contact: ocfs2-devel@oss.oracle.com +Description: + The /sys/fs/ocfs2 directory contains knobs used by the + ocfs2-tools to interact with the filesystem. + +What: /sys/fs/ocfs2/max_locking_protocol +Date: April 2008 +Contact: ocfs2-devel@oss.oracle.com +Description: + The /sys/fs/ocfs2/max_locking_protocol file displays version + of ocfs2 locking supported by the filesystem. This version + covers how ocfs2 uses distributed locking between cluster + nodes. + + The protocol version has a major and minor number. Two + cluster nodes can interoperate if they have an identical + major number and an overlapping minor number - thus, + a node with version 1.10 can interoperate with a node + sporting version 1.8, as long as both use the 1.8 protocol. + + Reading from this file returns a single line, the major + number and minor number joined by a period, eg "1.10". + + This file is read-only. The value is compiled into the + driver. + +What: /sys/fs/ocfs2/loaded_cluster_plugins +Date: April 2008 +Contact: ocfs2-devel@oss.oracle.com +Description: + The /sys/fs/ocfs2/loaded_cluster_plugins file describes + the available plugins to support ocfs2 cluster operation. + A cluster plugin is required to use ocfs2 in a cluster. + There are currently two available plugins: + + * 'o2cb' - The classic o2cb cluster stack that ocfs2 has + used since its inception. + * 'user' - A plugin supporting userspace cluster software + in conjunction with fs/dlm. + + Reading from this file returns the names of all loaded + plugins, one per line. + + This file is read-only. Its contents may change as + plugins are loaded or removed. + +What: /sys/fs/ocfs2/active_cluster_plugin +Date: April 2008 +Contact: ocfs2-devel@oss.oracle.com +Description: + The /sys/fs/ocfs2/active_cluster_plugin displays which + cluster plugin is currently in use by the filesystem. + The active plugin will appear in the loaded_cluster_plugins + file as well. Only one plugin can be used at a time. + + Reading from this file returns the name of the active plugin + on a single line. + + This file is read-only. Which plugin is active depends on + the cluster stack in use. The contents may change + when all filesystems are unmounted and the cluster stack + is changed. + +What: /sys/fs/ocfs2/cluster_stack +Date: April 2008 +Contact: ocfs2-devel@oss.oracle.com +Description: + The /sys/fs/ocfs2/cluster_stack file contains the name + of current ocfs2 cluster stack. This value is set by + userspace tools when bringing the cluster stack online. + + Cluster stack names are 4 characters in length. + + When the 'o2cb' cluster stack is used, the 'o2cb' cluster + plugin is active. All other cluster stacks use the 'user' + cluster plugin. + + Reading from this file returns the name of the current + cluster stack on a single line. + + Writing a new stack name to this file changes the current + cluster stack unless there are mounted ocfs2 filesystems. + If there are mounted filesystems, attempts to change the + stack return an error. + +Users: + ocfs2-tools <ocfs2-tools-devel@oss.oracle.com> diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power new file mode 100644 index 0000000..dcff4d0 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-power @@ -0,0 +1,103 @@ +What: /sys/power/ +Date: August 2006 +Contact: Rafael J. Wysocki <rjw@sisk.pl> +Description: + The /sys/power directory will contain files that will + provide a unified interface to the power management + subsystem. + +What: /sys/power/state +Date: August 2006 +Contact: Rafael J. Wysocki <rjw@sisk.pl> +Description: + The /sys/power/state file controls the system power state. + Reading from this file returns what states are supported, + which is hard-coded to 'standby' (Power-On Suspend), 'mem' + (Suspend-to-RAM), and 'disk' (Suspend-to-Disk). + + Writing to this file one of these strings causes the system to + transition into that state. Please see the file + Documentation/power/states.txt for a description of each of + these states. + +What: /sys/power/disk +Date: September 2006 +Contact: Rafael J. Wysocki <rjw@sisk.pl> +Description: + The /sys/power/disk file controls the operating mode of the + suspend-to-disk mechanism. Reading from this file returns + the name of the method by which the system will be put to + sleep on the next suspend. There are four methods supported: + 'firmware' - means that the memory image will be saved to disk + by some firmware, in which case we also assume that the + firmware will handle the system suspend. + 'platform' - the memory image will be saved by the kernel and + the system will be put to sleep by the platform driver (e.g. + ACPI or other PM registers). + 'shutdown' - the memory image will be saved by the kernel and + the system will be powered off. + 'reboot' - the memory image will be saved by the kernel and + the system will be rebooted. + + Additionally, /sys/power/disk can be used to turn on one of the + two testing modes of the suspend-to-disk mechanism: 'testproc' + or 'test'. If the suspend-to-disk mechanism is in the + 'testproc' mode, writing 'disk' to /sys/power/state will cause + the kernel to disable nonboot CPUs and freeze tasks, wait for 5 + seconds, unfreeze tasks and enable nonboot CPUs. If it is in + the 'test' mode, writing 'disk' to /sys/power/state will cause + the kernel to disable nonboot CPUs and freeze tasks, shrink + memory, suspend devices, wait for 5 seconds, resume devices, + unfreeze tasks and enable nonboot CPUs. Then, we are able to + look in the log messages and work out, for example, which code + is being slow and which device drivers are misbehaving. + + The suspend-to-disk method may be chosen by writing to this + file one of the accepted strings: + + 'firmware' + 'platform' + 'shutdown' + 'reboot' + 'testproc' + 'test' + + It will only change to 'firmware' or 'platform' if the system + supports that. + +What: /sys/power/image_size +Date: August 2006 +Contact: Rafael J. Wysocki <rjw@sisk.pl> +Description: + The /sys/power/image_size file controls the size of the image + created by the suspend-to-disk mechanism. It can be written a + string representing a non-negative integer that will be used + as an upper limit of the image size, in bytes. The kernel's + suspend-to-disk code will do its best to ensure the image size + will not exceed this number. However, if it turns out to be + impossible, the kernel will try to suspend anyway using the + smallest image possible. In particular, if "0" is written to + this file, the suspend image will be as small as possible. + + Reading from this file will display the current image size + limit, which is set to 500 MB by default. + +What: /sys/power/pm_trace +Date: August 2006 +Contact: Rafael J. Wysocki <rjw@sisk.pl> +Description: + The /sys/power/pm_trace file controls the code which saves the + last PM event point in the RTC across reboots, so that you can + debug a machine that just hangs during suspend (or more + commonly, during resume). Namely, the RTC is only used to save + the last PM event point if this file contains '1'. Initially + it contains '0' which may be changed to '1' by writing a + string representing a nonzero integer into it. + + To use this debugging feature you should attempt to suspend + the machine, then reboot it and run + + dmesg -s 1000000 | grep 'hash matches' + + CAUTION: Using it will cause your machine's real-time (CMOS) + clock to be set to a random invalid time after a resume. diff --git a/Documentation/ABI/testing/sysfs-profiling b/Documentation/ABI/testing/sysfs-profiling new file mode 100644 index 0000000..b02d8b8 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-profiling @@ -0,0 +1,13 @@ +What: /sys/kernel/profile +Date: September 2008 +Contact: Dave Hansen <dave@linux.vnet.ibm.com> +Description: + /sys/kernel/profile is the runtime equivalent + of the boot-time profile= option. + + You can get the same effect running: + + echo 2 > /sys/kernel/profile + + as you would by issuing profile=2 on the boot + command line. diff --git a/Documentation/ABI/testing/sysfs-wusb_cbaf b/Documentation/ABI/testing/sysfs-wusb_cbaf new file mode 100644 index 0000000..a99c5f8 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-wusb_cbaf @@ -0,0 +1,100 @@ +What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_* +Date: August 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + Various files for managing Cable Based Association of + (wireless) USB devices. + + The sequence of operations should be: + + 1. Device is plugged in. + + 2. The connection manager (CM) sees a device with CBA capability. + (the wusb_chid etc. files in /sys/devices/blah/OURDEVICE). + + 3. The CM writes the host name, supported band groups, + and the CHID (host ID) into the wusb_host_name, + wusb_host_band_groups and wusb_chid files. These + get sent to the device and the CDID (if any) for + this host is requested. + + 4. The CM can verify that the device's supported band + groups (wusb_device_band_groups) are compatible + with the host. + + 5. The CM reads the wusb_cdid file. + + 6. The CM looks it up its database. + + - If it has a matching CHID,CDID entry, the device + has been authorized before and nothing further + needs to be done. + + - If the CDID is zero (or the CM doesn't find a + matching CDID in its database), the device is + assumed to be not known. The CM may associate + the host with device by: writing a randomly + generated CDID to wusb_cdid and then a random CK + to wusb_ck (this uploads the new CC to the + device). + + CMD may choose to prompt the user before + associating with a new device. + + 7. Device is unplugged. + + References: + [WUSB-AM] Association Models Supplement to the + Certified Wireless Universal Serial Bus + Specification, version 1.0. + +What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_chid +Date: August 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The CHID of the host formatted as 16 space-separated + hex octets. + + Writes fetches device's supported band groups and the + the CDID for any existing association with this host. + +What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_host_name +Date: August 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + A friendly name for the host as a UTF-8 encoded string. + +What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_host_band_groups +Date: August 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The band groups supported by the host, in the format + defined in [WUSB-AM]. + +What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_device_band_groups +Date: August 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The band groups supported by the device, in the format + defined in [WUSB-AM]. + +What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_cdid +Date: August 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The device's CDID formatted as 16 space-separated hex + octets. + +What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_ck +Date: August 2008 +KernelVersion: 2.6.27 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + Write 16 space-separated random, hex octets to + associate with the device. |
