diff options
Diffstat (limited to 'Documentation')
124 files changed, 4750 insertions, 1176 deletions
diff --git a/Documentation/ABI/stable/sysfs-driver-qla2xxx b/Documentation/ABI/stable/sysfs-driver-qla2xxx new file mode 100644 index 00000000000..9a59d84497e --- /dev/null +++ b/Documentation/ABI/stable/sysfs-driver-qla2xxx @@ -0,0 +1,8 @@ +What: /sys/bus/pci/drivers/qla2xxx/.../devices/* +Date: September 2009 +Contact: QLogic Linux Driver <linux-driver@qlogic.com> +Description: qla2xxx-udev.sh currently looks for uevent CHANGE events to + signal a firmware-dump has been generated by the driver and is + ready for retrieval. +Users: qla2xxx-udev.sh. Proposed changes should be mailed to + linux-driver@qlogic.com diff --git a/Documentation/ABI/testing/procfs-diskstats b/Documentation/ABI/testing/procfs-diskstats index 99233902e09..f91a973a37f 100644 --- a/Documentation/ABI/testing/procfs-diskstats +++ b/Documentation/ABI/testing/procfs-diskstats @@ -8,7 +8,7 @@ Description: 1 - major number 2 - minor mumber 3 - device name - 4 - reads completed succesfully + 4 - reads completed successfully 5 - reads merged 6 - sectors read 7 - time spent reading (ms) diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index 5f3bedaf8e3..d2f90334bb9 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -4,7 +4,7 @@ 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 + 1 - reads completed successfully 2 - reads merged 3 - sectors read 4 - time spent reading (ms) diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index 7772928ee48..deb6b489e4e 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -144,3 +144,16 @@ Description: Write a 1 to force the device to disconnect (equivalent to unplugging a wired USB device). + +What: /sys/bus/usb/drivers/.../remove_id +Date: November 2009 +Contact: CHENG Renquan <rqcheng@smu.edu.sg> +Description: + Writing a device ID to this file will remove an ID + that was dynamically added via the new_id sysfs entry. + The format for the device ID is: + idVendor idProduct. After successfully + removing an ID, the driver will no longer support the + device. This is useful to ensure auto probing won't + match the driver to the device. For example: + # echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id diff --git a/Documentation/ABI/testing/sysfs-class-usb_host b/Documentation/ABI/testing/sysfs-class-uwb_rc-wusbhc index 46b66ad1f1b..25b1e751b77 100644 --- a/Documentation/ABI/testing/sysfs-class-usb_host +++ b/Documentation/ABI/testing/sysfs-class-uwb_rc-wusbhc @@ -1,4 +1,4 @@ -What: /sys/class/usb_host/usb_hostN/wusb_chid +What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_chid Date: July 2008 KernelVersion: 2.6.27 Contact: David Vrabel <david.vrabel@csr.com> @@ -9,7 +9,7 @@ Description: Set an all zero CHID to stop the host controller. -What: /sys/class/usb_host/usb_hostN/wusb_trust_timeout +What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_trust_timeout Date: July 2008 KernelVersion: 2.6.27 Contact: David Vrabel <david.vrabel@csr.com> @@ -23,3 +23,16 @@ Description: Since this relates to security (specifically, the lifetime of PTKs and GTKs) it should not be changed from the default. + +What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_phy_rate +Date: August 2009 +KernelVersion: 2.6.32 +Contact: David Vrabel <david.vrabel@csr.com> +Description: + The maximum PHY rate to use for all connected devices. + This is only of limited use for testing and + development as the hardware's automatic rate + adaptation is better then this simple control. + + Refer to [ECMA-368] section 10.3.1.1 for the value to + use. diff --git a/Documentation/ABI/testing/sysfs-devices-cache_disable b/Documentation/ABI/testing/sysfs-devices-cache_disable deleted file mode 100644 index 175bb4f7051..00000000000 --- a/Documentation/ABI/testing/sysfs-devices-cache_disable +++ /dev/null @@ -1,18 +0,0 @@ -What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X -Date: August 2008 -KernelVersion: 2.6.27 -Contact: mark.langsdorf@amd.com -Description: These files exist in every cpu's cache index directories. - There are currently 2 cache_disable_# files in each - directory. Reading from these files on a supported - processor will return that cache disable index value - for that processor and node. Writing to one of these - files will cause the specificed cache index to be disabled. - - Currently, only AMD Family 10h Processors support cache index - disable, and only for their L3 caches. See the BIOS and - Kernel Developer's Guide at - http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/31116-Public-GH-BKDG_3.20_2-4-09.pdf - for formatting information and other details on the - cache index disable. -Users: joachim.deguara@amd.com diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu new file mode 100644 index 00000000000..974e29f5da8 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -0,0 +1,174 @@ +What: /sys/devices/system/cpu/ +Date: pre-git history +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: + A collection of both global and individual CPU attributes + + Individual CPU attributes are contained in subdirectories + named by the kernel's logical CPU number, e.g.: + + /sys/devices/system/cpu/cpu#/ + +What: /sys/devices/system/cpu/sched_mc_power_savings + /sys/devices/system/cpu/sched_smt_power_savings +Date: June 2006 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: Discover and adjust the kernel's multi-core scheduler support. + + Possible values are: + + 0 - No power saving load balance (default value) + 1 - Fill one thread/core/package first for long running threads + 2 - Also bias task wakeups to semi-idle cpu package for power + savings + + sched_mc_power_savings is dependent upon SCHED_MC, which is + itself architecture dependent. + + sched_smt_power_savings is dependent upon SCHED_SMT, which + is itself architecture dependent. + + The two files are independent of each other. It is possible + that one file may be present without the other. + + Introduced by git commit 5c45bf27. + + +What: /sys/devices/system/cpu/kernel_max + /sys/devices/system/cpu/offline + /sys/devices/system/cpu/online + /sys/devices/system/cpu/possible + /sys/devices/system/cpu/present +Date: December 2008 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: CPU topology files that describe kernel limits related to + hotplug. Briefly: + + kernel_max: the maximum cpu index allowed by the kernel + configuration. + + offline: cpus that are not online because they have been + HOTPLUGGED off or exceed the limit of cpus allowed by the + kernel configuration (kernel_max above). + + online: cpus that are online and being scheduled. + + possible: cpus that have been allocated resources and can be + brought online if they are present. + + present: cpus that have been identified as being present in + the system. + + See Documentation/cputopology.txt for more information. + + + +What: /sys/devices/system/cpu/cpu#/node +Date: October 2009 +Contact: Linux memory management mailing list <linux-mm@kvack.org> +Description: Discover NUMA node a CPU belongs to + + When CONFIG_NUMA is enabled, a symbolic link that points + to the corresponding NUMA node directory. + + For example, the following symlink is created for cpu42 + in NUMA node 2: + + /sys/devices/system/cpu/cpu42/node2 -> ../../node/node2 + + +What: /sys/devices/system/cpu/cpu#/topology/core_id + /sys/devices/system/cpu/cpu#/topology/core_siblings + /sys/devices/system/cpu/cpu#/topology/core_siblings_list + /sys/devices/system/cpu/cpu#/topology/physical_package_id + /sys/devices/system/cpu/cpu#/topology/thread_siblings + /sys/devices/system/cpu/cpu#/topology/thread_siblings_list +Date: December 2008 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: CPU topology files that describe a logical CPU's relationship + to other cores and threads in the same physical package. + + One cpu# directory is created per logical CPU in the system, + e.g. /sys/devices/system/cpu/cpu42/. + + Briefly, the files above are: + + core_id: the CPU core ID of cpu#. Typically it is the + hardware platform's identifier (rather than the kernel's). + The actual value is architecture and platform dependent. + + core_siblings: internal kernel map of cpu#'s hardware threads + within the same physical_package_id. + + core_siblings_list: human-readable list of the logical CPU + numbers within the same physical_package_id as cpu#. + + physical_package_id: physical package id of cpu#. Typically + corresponds to a physical socket number, but the actual value + is architecture and platform dependent. + + thread_siblings: internel kernel map of cpu#'s hardware + threads within the same core as cpu# + + thread_siblings_list: human-readable list of cpu#'s hardware + threads within the same core as cpu# + + See Documentation/cputopology.txt for more information. + + +What: /sys/devices/system/cpu/cpuidle/current_driver + /sys/devices/system/cpu/cpuidle/current_governer_ro +Date: September 2007 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: Discover cpuidle policy and mechanism + + Various CPUs today support multiple idle levels that are + differentiated by varying exit latencies and power + consumption during idle. + + Idle policy (governor) is differentiated from idle mechanism + (driver) + + current_driver: displays current idle mechanism + + current_governor_ro: displays current idle policy + + See files in Documentation/cpuidle/ for more information. + + +What: /sys/devices/system/cpu/cpu#/cpufreq/* +Date: pre-git history +Contact: cpufreq@vger.kernel.org +Description: Discover and change clock speed of CPUs + + Clock scaling allows you to change the clock speed of the + CPUs on the fly. This is a nice method to save battery + power, because the lower the clock speed, the less power + the CPU consumes. + + There are many knobs to tweak in this directory. + + See files in Documentation/cpu-freq/ for more information. + + In particular, read Documentation/cpu-freq/user-guide.txt + to learn how to control the knobs. + + +What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X +Date: August 2008 +KernelVersion: 2.6.27 +Contact: mark.langsdorf@amd.com +Description: These files exist in every cpu's cache index directories. + There are currently 2 cache_disable_# files in each + directory. Reading from these files on a supported + processor will return that cache disable index value + for that processor and node. Writing to one of these + files will cause the specificed cache index to be disabled. + + Currently, only AMD Family 10h Processors support cache index + disable, and only for their L3 caches. See the BIOS and + Kernel Developer's Guide at + http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/31116-Public-GH-BKDG_3.20_2-4-09.pdf + for formatting information and other details on the + cache index disable. +Users: joachim.deguara@amd.com diff --git a/Documentation/DMA-mapping.txt b/Documentation/DMA-mapping.txt index 01f24e94bdb..ecad88d9fe5 100644 --- a/Documentation/DMA-mapping.txt +++ b/Documentation/DMA-mapping.txt @@ -214,7 +214,7 @@ most specific mask. Here is pseudo-code showing how this might be done: #define PLAYBACK_ADDRESS_BITS DMA_BIT_MASK(32) - #define RECORD_ADDRESS_BITS 0x00ffffff + #define RECORD_ADDRESS_BITS DMA_BIT_MASK(24) struct my_sound_card *card; struct pci_dev *pdev; @@ -224,14 +224,14 @@ Here is pseudo-code showing how this might be done: card->playback_enabled = 1; } else { card->playback_enabled = 0; - printk(KERN_WARN "%s: Playback disabled due to DMA limitations.\n", + printk(KERN_WARNING "%s: Playback disabled due to DMA limitations.\n", card->name); } if (!pci_set_dma_mask(pdev, RECORD_ADDRESS_BITS)) { card->record_enabled = 1; } else { card->record_enabled = 0; - printk(KERN_WARN "%s: Record disabled due to DMA limitations.\n", + printk(KERN_WARNING "%s: Record disabled due to DMA limitations.\n", card->name); } diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl index 94a20fe8fed..f9a6e2c75f1 100644 --- a/Documentation/DocBook/device-drivers.tmpl +++ b/Documentation/DocBook/device-drivers.tmpl @@ -293,10 +293,23 @@ X!Idrivers/video/console/fonts.c <chapter id="input_subsystem"> <title>Input Subsystem</title> + <sect1><title>Input core</title> !Iinclude/linux/input.h !Edrivers/input/input.c !Edrivers/input/ff-core.c !Edrivers/input/ff-memless.c + </sect1> + <sect1><title>Polled input devices</title> +!Iinclude/linux/input-polldev.h +!Edrivers/input/input-polldev.c + </sect1> + <sect1><title>Matrix keyboars/keypads</title> +!Iinclude/linux/input/matrix_keypad.h + </sect1> + <sect1><title>Sparse keymap support</title> +!Iinclude/linux/input/sparse-keymap.h +!Edrivers/input/sparse-keymap.c + </sect1> </chapter> <chapter id="spi"> diff --git a/Documentation/DocBook/dvb/dvbapi.xml b/Documentation/DocBook/dvb/dvbapi.xml index 4fc5b23470a..63c528fee62 100644 --- a/Documentation/DocBook/dvb/dvbapi.xml +++ b/Documentation/DocBook/dvb/dvbapi.xml @@ -30,6 +30,14 @@ <revhistory> <!-- Put document revisions here, newest first. --> <revision> + <revnumber>2.0.2</revnumber> + <date>2009-10-25</date> + <authorinitials>mcc</authorinitials> + <revremark> + documents FE_SET_FRONTEND_TUNE_MODE and FE_DISHETWORK_SEND_LEGACY_CMD ioctls. + </revremark> +</revision> +<revision> <revnumber>2.0.1</revnumber> <date>2009-09-16</date> <authorinitials>mcc</authorinitials> @@ -85,3 +93,8 @@ Added ISDB-T test originally written by Patrick Boettcher &sub-examples; </chapter> <!-- END OF CHAPTERS --> + <appendix id="frontend_h"> + <title>DVB Frontend Header File</title> + &sub-frontend-h; + </appendix> + diff --git a/Documentation/DocBook/dvb/isdbt.xml b/Documentation/DocBook/dvb/dvbproperty.xml index 92855222fcc..5f57c7ccd4b 100644 --- a/Documentation/DocBook/dvb/isdbt.xml +++ b/Documentation/DocBook/dvb/dvbproperty.xml @@ -1,3 +1,6 @@ +<section id="FE_GET_PROPERTY"> +<title>FE_GET_PROPERTY/FE_SET_PROPERTY</title> + <section id="isdbt"> <title>ISDB-T frontend</title> <para>This section describes shortly what are the possible parameters in the Linux @@ -312,3 +315,4 @@ </section> </section> </section> +</section> diff --git a/Documentation/DocBook/dvb/frontend.h.xml b/Documentation/DocBook/dvb/frontend.h.xml new file mode 100644 index 00000000000..b99644f5340 --- /dev/null +++ b/Documentation/DocBook/dvb/frontend.h.xml @@ -0,0 +1,415 @@ +<programlisting> +/* + * frontend.h + * + * Copyright (C) 2000 Marcus Metzler <marcus@convergence.de> + * Ralph Metzler <ralph@convergence.de> + * Holger Waechtler <holger@convergence.de> + * Andre Draszik <ad@convergence.de> + * for convergence integrated media GmbH + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 2.1 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#ifndef _DVBFRONTEND_H_ +#define _DVBFRONTEND_H_ + +#include <linux/types.h> + +typedef enum fe_type { + FE_QPSK, + FE_QAM, + FE_OFDM, + FE_ATSC +} fe_type_t; + + +typedef enum fe_caps { + FE_IS_STUPID = 0, + FE_CAN_INVERSION_AUTO = 0x1, + FE_CAN_FEC_1_2 = 0x2, + FE_CAN_FEC_2_3 = 0x4, + FE_CAN_FEC_3_4 = 0x8, + FE_CAN_FEC_4_5 = 0x10, + FE_CAN_FEC_5_6 = 0x20, + FE_CAN_FEC_6_7 = 0x40, + FE_CAN_FEC_7_8 = 0x80, + FE_CAN_FEC_8_9 = 0x100, + FE_CAN_FEC_AUTO = 0x200, + FE_CAN_QPSK = 0x400, + FE_CAN_QAM_16 = 0x800, + FE_CAN_QAM_32 = 0x1000, + FE_CAN_QAM_64 = 0x2000, + FE_CAN_QAM_128 = 0x4000, + FE_CAN_QAM_256 = 0x8000, + FE_CAN_QAM_AUTO = 0x10000, + FE_CAN_TRANSMISSION_MODE_AUTO = 0x20000, + FE_CAN_BANDWIDTH_AUTO = 0x40000, + FE_CAN_GUARD_INTERVAL_AUTO = 0x80000, + FE_CAN_HIERARCHY_AUTO = 0x100000, + FE_CAN_8VSB = 0x200000, + FE_CAN_16VSB = 0x400000, + FE_HAS_EXTENDED_CAPS = 0x800000, /* We need more bitspace for newer APIs, indicate this. */ + FE_CAN_2G_MODULATION = 0x10000000, /* frontend supports "2nd generation modulation" (DVB-S2) */ + FE_NEEDS_BENDING = 0x20000000, /* not supported anymore, don't use (frontend requires frequency bending) */ + FE_CAN_RECOVER = 0x40000000, /* frontend can recover from a cable unplug automatically */ + FE_CAN_MUTE_TS = 0x80000000 /* frontend can stop spurious TS data output */ +} fe_caps_t; + + +struct dvb_frontend_info { + char name[128]; + fe_type_t type; + __u32 frequency_min; + __u32 frequency_max; + __u32 frequency_stepsize; + __u32 frequency_tolerance; + __u32 symbol_rate_min; + __u32 symbol_rate_max; + __u32 symbol_rate_tolerance; /* ppm */ + __u32 notifier_delay; /* DEPRECATED */ + fe_caps_t caps; +}; + + +/** + * Check out the DiSEqC bus spec available on http://www.eutelsat.org/ for + * the meaning of this struct... + */ +struct dvb_diseqc_master_cmd { + __u8 msg [6]; /* { framing, address, command, data [3] } */ + __u8 msg_len; /* valid values are 3...6 */ +}; + + +struct dvb_diseqc_slave_reply { + __u8 msg [4]; /* { framing, data [3] } */ + __u8 msg_len; /* valid values are 0...4, 0 means no msg */ + int timeout; /* return from ioctl after timeout ms with */ +}; /* errorcode when no message was received */ + + +typedef enum fe_sec_voltage { + SEC_VOLTAGE_13, + SEC_VOLTAGE_18, + SEC_VOLTAGE_OFF +} fe_sec_voltage_t; + + +typedef enum fe_sec_tone_mode { + SEC_TONE_ON, + SEC_TONE_OFF +} fe_sec_tone_mode_t; + + +typedef enum fe_sec_mini_cmd { + SEC_MINI_A, + SEC_MINI_B +} fe_sec_mini_cmd_t; + + +typedef enum fe_status { + FE_HAS_SIGNAL = 0x01, /* found something above the noise level */ + FE_HAS_CARRIER = 0x02, /* found a DVB signal */ + FE_HAS_VITERBI = 0x04, /* FEC is stable */ + FE_HAS_SYNC = 0x08, /* found sync bytes */ + FE_HAS_LOCK = 0x10, /* everything's working... */ + FE_TIMEDOUT = 0x20, /* no lock within the last ~2 seconds */ + FE_REINIT = 0x40 /* frontend was reinitialized, */ +} fe_status_t; /* application is recommended to reset */ + /* DiSEqC, tone and parameters */ + +typedef enum fe_spectral_inversion { + INVERSION_OFF, + INVERSION_ON, + INVERSION_AUTO +} fe_spectral_inversion_t; + + +typedef enum fe_code_rate { + FEC_NONE = 0, + FEC_1_2, + FEC_2_3, + FEC_3_4, + FEC_4_5, + FEC_5_6, + FEC_6_7, + FEC_7_8, + FEC_8_9, + FEC_AUTO, + FEC_3_5, + FEC_9_10, +} fe_code_rate_t; + + +typedef enum fe_modulation { + QPSK, + QAM_16, + QAM_32, + QAM_64, + QAM_128, + QAM_256, + QAM_AUTO, + VSB_8, + VSB_16, + PSK_8, + APSK_16, + APSK_32, + DQPSK, +} fe_modulation_t; + +typedef enum fe_transmit_mode { + TRANSMISSION_MODE_2K, + TRANSMISSION_MODE_8K, + TRANSMISSION_MODE_AUTO, + TRANSMISSION_MODE_4K +} fe_transmit_mode_t; + +typedef enum fe_bandwidth { + BANDWIDTH_8_MHZ, + BANDWIDTH_7_MHZ, + BANDWIDTH_6_MHZ, + BANDWIDTH_AUTO +} fe_bandwidth_t; + + +typedef enum fe_guard_interval { + GUARD_INTERVAL_1_32, + GUARD_INTERVAL_1_16, + GUARD_INTERVAL_1_8, + GUARD_INTERVAL_1_4, + GUARD_INTERVAL_AUTO +} fe_guard_interval_t; + + +typedef enum fe_hierarchy { + HIERARCHY_NONE, + HIERARCHY_1, + HIERARCHY_2, + HIERARCHY_4, + HIERARCHY_AUTO +} fe_hierarchy_t; + + +struct dvb_qpsk_parameters { + __u32 symbol_rate; /* symbol rate in Symbols per second */ + fe_code_rate_t fec_inner; /* forward error correction (see above) */ +}; + +struct dvb_qam_parameters { + __u32 symbol_rate; /* symbol rate in Symbols per second */ + fe_code_rate_t fec_inner; /* forward error correction (see above) */ + fe_modulation_t modulation; /* modulation type (see above) */ +}; + +struct dvb_vsb_parameters { + fe_modulation_t modulation; /* modulation type (see above) */ +}; + +struct dvb_ofdm_parameters { + fe_bandwidth_t bandwidth; + fe_code_rate_t code_rate_HP; /* high priority stream code rate */ + fe_code_rate_t code_rate_LP; /* low priority stream code rate */ + fe_modulation_t constellation; /* modulation type (see above) */ + fe_transmit_mode_t transmission_mode; + fe_guard_interval_t guard_interval; + fe_hierarchy_t hierarchy_information; +}; + + +struct dvb_frontend_parameters { + __u32 frequency; /* (absolute) frequency in Hz for QAM/OFDM/ATSC */ + /* intermediate frequency in kHz for QPSK */ + fe_spectral_inversion_t inversion; + union { + struct dvb_qpsk_parameters qpsk; + struct dvb_qam_parameters qam; + struct dvb_ofdm_parameters ofdm; + struct dvb_vsb_parameters vsb; + } u; +}; + + +struct dvb_frontend_event { + fe_status_t status; + struct dvb_frontend_parameters parameters; +}; + +/* S2API Commands */ +#define DTV_UNDEFINED 0 +#define DTV_TUNE 1 +#define DTV_CLEAR 2 +#define DTV_FREQUENCY 3 +#define DTV_MODULATION 4 +#define DTV_BANDWIDTH_HZ 5 +#define DTV_INVERSION 6 +#define DTV_DISEQC_MASTER 7 +#define DTV_SYMBOL_RATE 8 +#define DTV_INNER_FEC 9 +#define DTV_VOLTAGE 10 +#define DTV_TONE 11 +#define DTV_PILOT 12 +#define DTV_ROLLOFF 13 +#define DTV_DISEQC_SLAVE_REPLY 14 + +/* Basic enumeration set for querying unlimited capabilities */ +#define DTV_FE_CAPABILITY_COUNT 15 +#define DTV_FE_CAPABILITY 16 +#define DTV_DELIVERY_SYSTEM 17 + +/* ISDB-T and ISDB-Tsb */ +#define DTV_ISDBT_PARTIAL_RECEPTION 18 +#define DTV_ISDBT_SOUND_BROADCASTING 19 + +#define DTV_ISDBT_SB_SUBCHANNEL_ID 20 +#define DTV_ISDBT_SB_SEGMENT_IDX 21 +#define DTV_ISDBT_SB_SEGMENT_COUNT 22 + +#define DTV_ISDBT_LAYERA_FEC 23 +#define DTV_ISDBT_LAYERA_MODULATION 24 +#define DTV_ISDBT_LAYERA_SEGMENT_COUNT 25 +#define DTV_ISDBT_LAYERA_TIME_INTERLEAVING 26 + +#define DTV_ISDBT_LAYERB_FEC 27 +#define DTV_ISDBT_LAYERB_MODULATION 28 +#define DTV_ISDBT_LAYERB_SEGMENT_COUNT 29 +#define DTV_ISDBT_LAYERB_TIME_INTERLEAVING 30 + +#define DTV_ISDBT_LAYERC_FEC 31 +#define DTV_ISDBT_LAYERC_MODULATION 32 +#define DTV_ISDBT_LAYERC_SEGMENT_COUNT 33 +#define DTV_ISDBT_LAYERC_TIME_INTERLEAVING 34 + +#define DTV_API_VERSION 35 + +#define DTV_CODE_RATE_HP 36 +#define DTV_CODE_RATE_LP 37 +#define DTV_GUARD_INTERVAL 38 +#define DTV_TRANSMISSION_MODE 39 +#define DTV_HIERARCHY 40 + +#define DTV_ISDBT_LAYER_ENABLED 41 + +#define DTV_ISDBS_TS_ID 42 + +#define DTV_MAX_COMMAND DTV_ISDBS_TS_ID + +typedef enum fe_pilot { + PILOT_ON, + PILOT_OFF, + PILOT_AUTO, +} fe_pilot_t; + +typedef enum fe_rolloff { + ROLLOFF_35, /* Implied value in DVB-S, default for DVB-S2 */ + ROLLOFF_20, + ROLLOFF_25, + ROLLOFF_AUTO, +} fe_rolloff_t; + +typedef enum fe_delivery_system { + SYS_UNDEFINED, + SYS_DVBC_ANNEX_AC, + SYS_DVBC_ANNEX_B, + SYS_DVBT, + SYS_DSS, + SYS_DVBS, + SYS_DVBS2, + SYS_DVBH, + SYS_ISDBT, + SYS_ISDBS, + SYS_ISDBC, + SYS_ATSC, + SYS_ATSCMH, + SYS_DMBTH, + SYS_CMMB, + SYS_DAB, +} fe_delivery_system_t; + +struct dtv_cmds_h { + char *name; /* A display name for debugging purposes */ + + __u32 cmd; /* A unique ID */ + + /* Flags */ + __u32 set:1; /* Either a set or get property */ + __u32 buffer:1; /* Does this property use the buffer? */ + __u32 reserved:30; /* Align */ +}; + +struct dtv_property { + __u32 cmd; + __u32 reserved[3]; + union { + __u32 data; + struct { + __u8 data[32]; + __u32 len; + __u32 reserved1[3]; + void *reserved2; + } buffer; + } u; + int result; +} __attribute__ ((packed)); + +/* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */ +#define DTV_IOCTL_MAX_MSGS 64 + +struct dtv_properties { + __u32 num; + struct dtv_property *props; +}; + +#define <link linkend="FE_GET_PROPERTY">FE_SET_PROPERTY</link> _IOW('o', 82, struct dtv_properties) +#define <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link> _IOR('o', 83, struct dtv_properties) + + +/** + * When set, this flag will disable any zigzagging or other "normal" tuning + * behaviour. Additionally, there will be no automatic monitoring of the lock + * status, and hence no frontend events will be generated. If a frontend device + * is closed, this flag will be automatically turned off when the device is + * reopened read-write. + */ +#define FE_TUNE_MODE_ONESHOT 0x01 + + +#define <link linkend="FE_GET_INFO">FE_GET_INFO</link> _IOR('o', 61, struct dvb_frontend_info) + +#define <link linkend="FE_DISEQC_RESET_OVERLOAD">FE_DISEQC_RESET_OVERLOAD</link> _IO('o', 62) +#define <link linkend="FE_DISEQC_SEND_MASTER_CMD">FE_DISEQC_SEND_MASTER_CMD</link> _IOW('o', 63, struct dvb_diseqc_master_cmd) +#define <link linkend="FE_DISEQC_RECV_SLAVE_REPLY">FE_DISEQC_RECV_SLAVE_REPLY</link> _IOR('o', 64, struct dvb_diseqc_slave_reply) +#define <link linkend="FE_DISEQC_SEND_BURST">FE_DISEQC_SEND_BURST</link> _IO('o', 65) /* fe_sec_mini_cmd_t */ + +#define <link linkend="FE_SET_TONE">FE_SET_TONE</link> _IO('o', 66) /* fe_sec_tone_mode_t */ +#define <link linkend="FE_SET_VOLTAGE">FE_SET_VOLTAGE</link> _IO('o', 67) /* fe_sec_voltage_t */ +#define <link linkend="FE_ENABLE_HIGH_LNB_VOLTAGE">FE_ENABLE_HIGH_LNB_VOLTAGE</link> _IO('o', 68) /* int */ + +#define <link linkend="FE_READ_STATUS">FE_READ_STATUS</link> _IOR('o', 69, fe_status_t) +#define <link linkend="FE_READ_BER">FE_READ_BER</link> _IOR('o', 70, __u32) +#define <link linkend="FE_READ_SIGNAL_STRENGTH">FE_READ_SIGNAL_STRENGTH</link> _IOR('o', 71, __u16) +#define <link linkend="FE_READ_SNR">FE_READ_SNR</link> _IOR('o', 72, __u16) +#define <link linkend="FE_READ_UNCORRECTED_BLOCKS">FE_READ_UNCORRECTED_BLOCKS</link> _IOR('o', 73, __u32) + +#define <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> _IOW('o', 76, struct dvb_frontend_parameters) +#define <link linkend="FE_GET_FRONTEND">FE_GET_FRONTEND</link> _IOR('o', 77, struct dvb_frontend_parameters) +#define <link linkend="FE_SET_FRONTEND_TUNE_MODE">FE_SET_FRONTEND_TUNE_MODE</link> _IO('o', 81) /* unsigned int */ +#define <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> _IOR('o', 78, struct dvb_frontend_event) + +#define <link linkend="FE_DISHNETWORK_SEND_LEGACY_CMD">FE_DISHNETWORK_SEND_LEGACY_CMD</link> _IO('o', 80) /* unsigned int */ + +#endif /*_DVBFRONTEND_H_*/ +</programlisting> diff --git a/Documentation/DocBook/dvb/frontend.xml b/Documentation/DocBook/dvb/frontend.xml index 9d89a7b94fd..300ba1f0417 100644 --- a/Documentation/DocBook/dvb/frontend.xml +++ b/Documentation/DocBook/dvb/frontend.xml @@ -73,7 +73,8 @@ a specific frontend type.</para> <section id="frontend_info"> <title>frontend information</title> -<para>Information about the frontend ca be queried with FE_GET_INFO.</para> +<para>Information about the frontend ca be queried with + <link linkend="FE_GET_INFO">FE_GET_INFO</link>.</para> <programlisting> struct dvb_frontend_info { @@ -338,7 +339,7 @@ modulation mode which can be one of the following: <entry align="char"> <para>This system call opens a named frontend device (/dev/dvb/adapter0/frontend0) for subsequent use. Usually the first thing to do after a successful open is to - find out the frontend type with FE_GET_INFO.</para> + find out the frontend type with <link linkend="FE_GET_INFO">FE_GET_INFO</link>.</para> <para>The device can be opened in read-only mode, which only allows monitoring of device status and statistics, or read/write mode, which allows any kind of use (e.g. performing tuning operations.) @@ -478,7 +479,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_read_status"> +<section id="FE_READ_STATUS"> <title>FE_READ_STATUS</title> <para>DESCRIPTION </para> @@ -492,7 +493,7 @@ modulation mode which can be one of the following: </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>int ioctl(int fd, int request = FE_READ_STATUS, +<para>int ioctl(int fd, int request = <link linkend="FE_READ_STATUS">FE_READ_STATUS</link>, fe_status_t ⋆status);</para> </entry> </row></tbody></tgroup></informaltable> @@ -511,7 +512,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_READ_STATUS for this command.</para> +<para>Equals <link linkend="FE_READ_STATUS">FE_READ_STATUS</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -542,7 +543,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_read_ber"> +<section id="FE_READ_BER"> <title>FE_READ_BER</title> <para>DESCRIPTION </para> @@ -557,7 +558,7 @@ modulation mode which can be one of the following: </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>int ioctl(int fd, int request = FE_READ_BER, +<para>int ioctl(int fd, int request = <link linkend="FE_READ_BER">FE_READ_BER</link>, uint32_t ⋆ber);</para> </entry> </row></tbody></tgroup></informaltable> @@ -575,7 +576,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_READ_BER for this command.</para> +<para>Equals <link linkend="FE_READ_BER">FE_READ_BER</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -619,7 +620,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_read_snr"> +<section id="FE_READ_SNR"> <title>FE_READ_SNR</title> <para>DESCRIPTION @@ -634,7 +635,7 @@ modulation mode which can be one of the following: </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>int ioctl(int fd, int request = FE_READ_SNR, int16_t +<para>int ioctl(int fd, int request = <link linkend="FE_READ_SNR">FE_READ_SNR</link>, int16_t ⋆snr);</para> </entry> </row></tbody></tgroup></informaltable> @@ -652,7 +653,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_READ_SNR for this command.</para> +<para>Equals <link linkend="FE_READ_SNR">FE_READ_SNR</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -697,7 +698,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_read_signal_strength"> +<section id="FE_READ_SIGNAL_STRENGTH"> <title>FE_READ_SIGNAL_STRENGTH</title> <para>DESCRIPTION </para> @@ -712,7 +713,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> <para>int ioctl( int fd, int request = - FE_READ_SIGNAL_STRENGTH, int16_t ⋆strength);</para> + <link linkend="FE_READ_SIGNAL_STRENGTH">FE_READ_SIGNAL_STRENGTH</link>, int16_t ⋆strength);</para> </entry> </row></tbody></tgroup></informaltable> @@ -730,7 +731,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_READ_SIGNAL_STRENGTH for this +<para>Equals <link linkend="FE_READ_SIGNAL_STRENGTH">FE_READ_SIGNAL_STRENGTH</link> for this command.</para> </entry> </row><row><entry @@ -775,7 +776,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_read_ub"> +<section id="FE_READ_UNCORRECTED_BLOCKS"> <title>FE_READ_UNCORRECTED_BLOCKS</title> <para>DESCRIPTION </para> @@ -797,7 +798,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> <para>int ioctl( int fd, int request = - FE_READ_UNCORRECTED_BLOCKS, uint32_t ⋆ublocks);</para> + <link linkend="FE_READ_UNCORRECTED_BLOCKS">FE_READ_UNCORRECTED_BLOCKS</link>, uint32_t ⋆ublocks);</para> </entry> </row></tbody></tgroup></informaltable> <para>PARAMETERS @@ -814,7 +815,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_READ_UNCORRECTED_BLOCKS for this +<para>Equals <link linkend="FE_READ_UNCORRECTED_BLOCKS">FE_READ_UNCORRECTED_BLOCKS</link> for this command.</para> </entry> </row><row><entry @@ -852,7 +853,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_set_fe"> +<section id="FE_SET_FRONTEND"> <title>FE_SET_FRONTEND</title> <para>DESCRIPTION </para> @@ -861,8 +862,8 @@ modulation mode which can be one of the following: <para>This ioctl call starts a tuning operation using specified parameters. The result of this call will be successful if the parameters were valid and the tuning could be initiated. The result of the tuning operation in itself, however, will arrive - asynchronously as an event (see documentation for FE_GET_EVENT and - FrontendEvent.) If a new FE_SET_FRONTEND operation is initiated before + asynchronously as an event (see documentation for <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> and + FrontendEvent.) If a new <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> operation is initiated before the previous one was completed, the previous operation will be aborted in favor of the new one. This command requires read/write access to the device.</para> </entry> @@ -872,7 +873,7 @@ modulation mode which can be one of the following: </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>int ioctl(int fd, int request = FE_SET_FRONTEND, +<para>int ioctl(int fd, int request = <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link>, struct dvb_frontend_parameters ⋆p);</para> </entry> </row></tbody></tgroup></informaltable> @@ -890,7 +891,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_SET_FRONTEND for this command.</para> +<para>Equals <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -928,7 +929,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_get_fe"> +<section id="FE_GET_FRONTEND"> <title>FE_GET_FRONTEND</title> <para>DESCRIPTION </para> @@ -943,7 +944,7 @@ modulation mode which can be one of the following: </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>int ioctl(int fd, int request = FE_GET_FRONTEND, +<para>int ioctl(int fd, int request = <link linkend="FE_GET_FRONTEND">FE_GET_FRONTEND</link>, struct dvb_frontend_parameters ⋆p);</para> </entry> </row></tbody></tgroup></informaltable> @@ -962,7 +963,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_SET_FRONTEND for this command.</para> +<para>Equals <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -1003,7 +1004,7 @@ modulation mode which can be one of the following: </section> -<section id="frontend_get_event"> +<section id="FE_GET_EVENT"> <title>FE_GET_EVENT</title> <para>DESCRIPTION </para> @@ -1024,7 +1025,8 @@ modulation mode which can be one of the following: rather small (room for 8 events), the queue must be serviced regularly to avoid overflow. If an overflow happens, the oldest event is discarded from the queue, and an error (EOVERFLOW) occurs the next time the queue is read. After - reporting the error condition in this fashion, subsequent FE_GET_EVENT + reporting the error condition in this fashion, subsequent + <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> calls will return events from the queue as usual.</para> </entry> </row><row><entry @@ -1057,7 +1059,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_GET_EVENT for this command.</para> +<para>Equals <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -1115,7 +1117,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_get_info"> +<section id="FE_GET_INFO"> <title>FE_GET_INFO</title> <para>DESCRIPTION </para> @@ -1130,7 +1132,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para> int ioctl(int fd, int request = FE_GET_INFO, struct +<para> int ioctl(int fd, int request = <link linkend="FE_GET_INFO">FE_GET_INFO</link>, struct dvb_frontend_info ⋆info);</para> </entry> </row></tbody></tgroup></informaltable> @@ -1149,7 +1151,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_GET_INFO for this command.</para> +<para>Equals <link linkend="FE_GET_INFO">FE_GET_INFO</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -1181,7 +1183,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_diseqc_reset_overload"> +<section id="FE_DISEQC_RESET_OVERLOAD"> <title>FE_DISEQC_RESET_OVERLOAD</title> <para>DESCRIPTION </para> @@ -1199,7 +1201,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> <para>int ioctl(int fd, int request = - FE_DISEQC_RESET_OVERLOAD);</para> + <link linkend="FE_DISEQC_RESET_OVERLOAD">FE_DISEQC_RESET_OVERLOAD</link>);</para> </entry> </row></tbody></tgroup></informaltable> <para>PARAMETERS @@ -1216,7 +1218,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_DISEQC_RESET_OVERLOAD for this +<para>Equals <link linkend="FE_DISEQC_RESET_OVERLOAD">FE_DISEQC_RESET_OVERLOAD</link> for this command.</para> </entry> </row></tbody></tgroup></informaltable> @@ -1247,7 +1249,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_diseqc_send_master_cmd"> +<section id="FE_DISEQC_SEND_MASTER_CMD"> <title>FE_DISEQC_SEND_MASTER_CMD</title> <para>DESCRIPTION </para> @@ -1261,7 +1263,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> <para>int ioctl(int fd, int request = - FE_DISEQC_SEND_MASTER_CMD, struct + <link linkend="FE_DISEQC_SEND_MASTER_CMD">FE_DISEQC_SEND_MASTER_CMD</link>, struct dvb_diseqc_master_cmd ⋆cmd);</para> </entry> </row></tbody></tgroup></informaltable> @@ -1280,7 +1282,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_DISEQC_SEND_MASTER_CMD for this +<para>Equals <link linkend="FE_DISEQC_SEND_MASTER_CMD">FE_DISEQC_SEND_MASTER_CMD</link> for this command.</para> </entry> </row><row><entry @@ -1335,7 +1337,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_diseqc_recv_slave_reply"> +<section id="FE_DISEQC_RECV_SLAVE_REPLY"> <title>FE_DISEQC_RECV_SLAVE_REPLY</title> <para>DESCRIPTION </para> @@ -1350,7 +1352,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> <para>int ioctl(int fd, int request = - FE_DISEQC_RECV_SLAVE_REPLY, struct + <link linkend="FE_DISEQC_RECV_SLAVE_REPLY">FE_DISEQC_RECV_SLAVE_REPLY</link>, struct dvb_diseqc_slave_reply ⋆reply);</para> </entry> </row></tbody></tgroup></informaltable> @@ -1369,7 +1371,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_DISEQC_RECV_SLAVE_REPLY for this +<para>Equals <link linkend="FE_DISEQC_RECV_SLAVE_REPLY">FE_DISEQC_RECV_SLAVE_REPLY</link> for this command.</para> </entry> </row><row><entry @@ -1423,7 +1425,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_diseqc_send_burst"> +<section id="FE_DISEQC_SEND_BURST"> <title>FE_DISEQC_SEND_BURST</title> <para>DESCRIPTION </para> @@ -1438,7 +1440,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> <para>int ioctl(int fd, int request = - FE_DISEQC_SEND_BURST, fe_sec_mini_cmd_t burst);</para> + <link linkend="FE_DISEQC_SEND_BURST">FE_DISEQC_SEND_BURST</link>, fe_sec_mini_cmd_t burst);</para> </entry> </row></tbody></tgroup></informaltable> @@ -1456,7 +1458,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_DISEQC_SEND_BURST for this command.</para> +<para>Equals <link linkend="FE_DISEQC_SEND_BURST">FE_DISEQC_SEND_BURST</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -1509,7 +1511,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_set_tone"> +<section id="FE_SET_TONE"> <title>FE_SET_TONE</title> <para>DESCRIPTION </para> @@ -1523,7 +1525,7 @@ modulation mode which can be one of the following: </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>int ioctl(int fd, int request = FE_SET_TONE, +<para>int ioctl(int fd, int request = <link linkend="FE_SET_TONE">FE_SET_TONE</link>, fe_sec_tone_mode_t tone);</para> </entry> </row></tbody></tgroup></informaltable> @@ -1541,7 +1543,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_SET_TONE for this command.</para> +<para>Equals <link linkend="FE_SET_TONE">FE_SET_TONE</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -1592,7 +1594,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="fe_set_voltage"> +<section id="FE_SET_VOLTAGE"> <title>FE_SET_VOLTAGE</title> <para>DESCRIPTION </para> @@ -1606,7 +1608,7 @@ modulation mode which can be one of the following: </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>int ioctl(int fd, int request = FE_SET_VOLTAGE, +<para>int ioctl(int fd, int request = <link linkend="FE_SET_VOLTAGE">FE_SET_VOLTAGE</link>, fe_sec_voltage_t voltage);</para> </entry> </row></tbody></tgroup></informaltable> @@ -1625,7 +1627,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_SET_VOLTAGE for this command.</para> +<para>Equals <link linkend="FE_SET_VOLTAGE">FE_SET_VOLTAGE</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -1677,7 +1679,7 @@ modulation mode which can be one of the following: </row></tbody></tgroup></informaltable> </section> -<section id="frontend_enable_high_lnb_volt"> +<section id="FE_ENABLE_HIGH_LNB_VOLTAGE"> <title>FE_ENABLE_HIGH_LNB_VOLTAGE</title> <para>DESCRIPTION </para> @@ -1694,7 +1696,7 @@ modulation mode which can be one of the following: <informaltable><tgroup cols="1"><tbody><row><entry align="char"> <para>int ioctl(int fd, int request = - FE_ENABLE_HIGH_LNB_VOLTAGE, int high);</para> + <link linkend="FE_ENABLE_HIGH_LNB_VOLTAGE">FE_ENABLE_HIGH_LNB_VOLTAGE</link>, int high);</para> </entry> </row></tbody></tgroup></informaltable> @@ -1712,7 +1714,7 @@ modulation mode which can be one of the following: <para>int request</para> </entry><entry align="char"> -<para>Equals FE_SET_VOLTAGE for this command.</para> +<para>Equals <link linkend="FE_SET_VOLTAGE">FE_SET_VOLTAGE</link> for this command.</para> </entry> </row><row><entry align="char"> @@ -1762,5 +1764,82 @@ modulation mode which can be one of the following: </entry> </row></tbody></tgroup></informaltable> </section> + +<section id="FE_SET_FRONTEND_TUNE_MODE"> +<title>FE_SET_FRONTEND_TUNE_MODE</title> +<para>DESCRIPTION</para> +<informaltable><tgroup cols="1"><tbody><row> +<entry align="char"> +<para>Allow setting tuner mode flags to the frontend.</para> +</entry> +</row></tbody></tgroup></informaltable> + +<para>SYNOPSIS</para> +<informaltable><tgroup cols="1"><tbody><row> +<entry align="char"> +<para>int ioctl(int fd, int request = +<link linkend="FE_SET_FRONTEND_TUNE_MODE">FE_SET_FRONTEND_TUNE_MODE</link>, unsigned int flags);</para> +</entry> +</row></tbody></tgroup></informaltable> + +<para>PARAMETERS</para> +<informaltable><tgroup cols="2"><tbody><row> +<entry align="char"> + <para>unsigned int flags</para> +</entry> +<entry align="char"> +<para> +FE_TUNE_MODE_ONESHOT When set, this flag will disable any zigzagging or other "normal" tuning behaviour. Additionally, there will be no automatic monitoring of the lock status, and hence no frontend events will be generated. If a frontend device is closed, this flag will be automatically turned off when the device is reopened read-write. +</para> +</entry> + </row></tbody></tgroup></informaltable> + +<para>ERRORS</para> +<informaltable><tgroup cols="2"><tbody><row> +<entry align="char"><para>EINVAL</para></entry> +<entry align="char"><para>Invalid argument.</para></entry> + </row></tbody></tgroup></informaltable> </section> -&sub-isdbt; + +<section id="FE_DISHNETWORK_SEND_LEGACY_CMD"> + <title>FE_DISHNETWORK_SEND_LEGACY_CMD</title> +<para>DESCRIPTION</para> +<informaltable><tgroup cols="1"><tbody><row> +<entry align="char"> +<para>WARNING: This is a very obscure legacy command, used only at stv0299 driver. Should not be used on newer drivers.</para> +<para>It provides a non-standard method for selecting Diseqc voltage on the frontend, for Dish Network legacy switches.</para> +<para>As support for this ioctl were added in 2004, this means that such dishes were already legacy in 2004.</para> +</entry> +</row></tbody></tgroup></informaltable> + +<para>SYNOPSIS</para> +<informaltable><tgroup cols="1"><tbody><row> +<entry align="char"> +<para>int ioctl(int fd, int request = + <link linkend="FE_DISHNETWORK_SEND_LEGACY_CMD">FE_DISHNETWORK_SEND_LEGACY_CMD</link>, unsigned long cmd);</para> +</entry> +</row></tbody></tgroup></informaltable> + +<para>PARAMETERS</para> +<informaltable><tgroup cols="2"><tbody><row> +<entry align="char"> + <para>unsigned long cmd</para> +</entry> +<entry align="char"> +<para> +sends the specified raw cmd to the dish via DISEqC. +</para> +</entry> + </row></tbody></tgroup></informaltable> + +<para>ERRORS</para> +<informaltable><tgroup cols="1"><tbody><row> +<entry align="char"> + <para>There are no errors in use for this call</para> +</entry> +</row></tbody></tgroup></informaltable> +</section> + +</section> + +&sub-dvbproperty; diff --git a/Documentation/DocBook/genericirq.tmpl b/Documentation/DocBook/genericirq.tmpl index c671a016809..1448b33fd22 100644 --- a/Documentation/DocBook/genericirq.tmpl +++ b/Documentation/DocBook/genericirq.tmpl @@ -417,8 +417,8 @@ desc->chip->end(); </para> <para> To make use of the split implementation, replace the call to - __do_IRQ by a call to desc->chip->handle_irq() and associate - the appropriate handler function to desc->chip->handle_irq(). + __do_IRQ by a call to desc->handle_irq() and associate + the appropriate handler function to desc->handle_irq(). In most cases the generic handler implementations should be sufficient. </para> diff --git a/Documentation/DocBook/kernel-hacking.tmpl b/Documentation/DocBook/kernel-hacking.tmpl index 992e67e6be7..7b3f4936341 100644 --- a/Documentation/DocBook/kernel-hacking.tmpl +++ b/Documentation/DocBook/kernel-hacking.tmpl @@ -352,7 +352,7 @@ asmlinkage long sys_mycall(int arg) </para> <programlisting> -if (signal_pending()) +if (signal_pending(current)) return -ERESTARTSYS; </programlisting> diff --git a/Documentation/DocBook/media-entities.tmpl b/Documentation/DocBook/media-entities.tmpl index 0eb43c1970b..bb5ab741220 100644 --- a/Documentation/DocBook/media-entities.tmpl +++ b/Documentation/DocBook/media-entities.tmpl @@ -280,7 +280,7 @@ <!ENTITY sub-v4l2 SYSTEM "v4l/v4l2.xml"> <!ENTITY sub-intro SYSTEM "dvb/intro.xml"> <!ENTITY sub-frontend SYSTEM "dvb/frontend.xml"> -<!ENTITY sub-isdbt SYSTEM "dvb/isdbt.xml"> +<!ENTITY sub-dvbproperty SYSTEM "dvb/dvbproperty.xml"> <!ENTITY sub-demux SYSTEM "dvb/demux.xml"> <!ENTITY sub-video SYSTEM "dvb/video.xml"> <!ENTITY sub-audio SYSTEM "dvb/audio.xml"> @@ -288,6 +288,7 @@ <!ENTITY sub-net SYSTEM "dvb/net.xml"> <!ENTITY sub-kdapi SYSTEM "dvb/kdapi.xml"> <!ENTITY sub-examples SYSTEM "dvb/examples.xml"> +<!ENTITY sub-frontend-h SYSTEM "dvb/frontend.h.xml"> <!ENTITY sub-dvbapi SYSTEM "dvb/dvbapi.xml"> <!ENTITY sub-media SYSTEM "media.xml"> <!ENTITY sub-media-entities SYSTEM "media-entities.tmpl"> diff --git a/Documentation/DocBook/mtdnand.tmpl b/Documentation/DocBook/mtdnand.tmpl index df0d089d0fb..f508a8a27fe 100644 --- a/Documentation/DocBook/mtdnand.tmpl +++ b/Documentation/DocBook/mtdnand.tmpl @@ -362,7 +362,7 @@ module_exit(board_cleanup); <sect1 id="Multiple_chip_control"> <title>Multiple chip control</title> <para> - The nand driver can control chip arrays. Therefor the + The nand driver can control chip arrays. Therefore the board driver must provide an own select_chip function. This function must (de)select the requested chip. The function pointer in the nand_chip structure must diff --git a/Documentation/DocBook/tracepoint.tmpl b/Documentation/DocBook/tracepoint.tmpl index b0756d0fd57..8bca1d5cec0 100644 --- a/Documentation/DocBook/tracepoint.tmpl +++ b/Documentation/DocBook/tracepoint.tmpl @@ -86,4 +86,9 @@ !Iinclude/trace/events/irq.h </chapter> + <chapter id="signal"> + <title>SIGNAL</title> +!Iinclude/trace/events/signal.h + </chapter> + </book> diff --git a/Documentation/DocBook/v4l/controls.xml b/Documentation/DocBook/v4l/controls.xml index f492accb691..f4645061041 100644 --- a/Documentation/DocBook/v4l/controls.xml +++ b/Documentation/DocBook/v4l/controls.xml @@ -281,10 +281,28 @@ minimum value disables backlight compensation.</entry> <constant>V4L2_COLORFX_SEPIA</constant> (2).</entry> </row> <row> + <entry><constant>V4L2_CID_ROTATE</constant></entry> + <entry>integer</entry> + <entry>Rotates the image by specified angle. Common angles are 90, + 270 and 180. Rotating the image to 90 and 270 will reverse the height + and width of the display window. It is necessary to set the new height and + width of the picture using the &VIDIOC-S-FMT; ioctl according to + the rotation angle selected.</entry> + </row> + <row> + <entry><constant>V4L2_CID_BG_COLOR</constant></entry> + <entry>integer</entry> + <entry>Sets the background color on the current output device. + Background color needs to be specified in the RGB24 format. The + supplied 32 bit value is interpreted as bits 0-7 Red color information, + bits 8-15 Green color information, bits 16-23 Blue color + information and bits 24-31 must be zero.</entry> + </row> + <row> <entry><constant>V4L2_CID_LASTP1</constant></entry> <entry></entry> <entry>End of the predefined control IDs (currently -<constant>V4L2_CID_COLORFX</constant> + 1).</entry> +<constant>V4L2_CID_BG_COLOR</constant> + 1).</entry> </row> <row> <entry><constant>V4L2_CID_PRIVATE_BASE</constant></entry> diff --git a/Documentation/DocBook/v4l/pixfmt.xml b/Documentation/DocBook/v4l/pixfmt.xml index 7d396a3785f..885968d6a2f 100644 --- a/Documentation/DocBook/v4l/pixfmt.xml +++ b/Documentation/DocBook/v4l/pixfmt.xml @@ -770,6 +770,11 @@ kernel sources in the file <filename>Documentation/video4linux/cx2341x/README.hm <entry>'S920'</entry> <entry>YUV 4:2:0 format of the gspca sn9c20x driver.</entry> </row> + <row id="V4L2-PIX-FMT-STV0680"> + <entry><constant>V4L2_PIX_FMT_STV0680</constant></entry> + <entry>'S680'</entry> + <entry>Bayer format of the gspca stv0680 driver.</entry> + </row> <row id="V4L2-PIX-FMT-WNVA"> <entry><constant>V4L2_PIX_FMT_WNVA</constant></entry> <entry>'WNVA'</entry> diff --git a/Documentation/DocBook/v4l/videodev2.h.xml b/Documentation/DocBook/v4l/videodev2.h.xml index 97002060ac4..3e282ed9f59 100644 --- a/Documentation/DocBook/v4l/videodev2.h.xml +++ b/Documentation/DocBook/v4l/videodev2.h.xml @@ -363,6 +363,7 @@ struct <link linkend="v4l2-pix-format">v4l2_pix_format</link> { #define <link linkend="V4L2-PIX-FMT-OV511">V4L2_PIX_FMT_OV511</link> v4l2_fourcc('O', '5', '1', '1') /* ov511 JPEG */ #define <link linkend="V4L2-PIX-FMT-OV518">V4L2_PIX_FMT_OV518</link> v4l2_fourcc('O', '5', '1', '8') /* ov518 JPEG */ #define <link linkend="V4L2-PIX-FMT-TM6000">V4L2_PIX_FMT_TM6000</link> v4l2_fourcc('T', 'M', '6', '0') /* tm5600/tm60x0 */ +#define <link linkend="V4L2-PIX-FMT-STV0680">V4L2_PIX_FMT_STV0680</link> v4l2_fourcc('S', '6', '8', '0') /* stv0680 bayer */ /* * F O R M A T E N U M E R A T I O N @@ -492,7 +493,7 @@ struct <link linkend="v4l2-jpegcompression">v4l2_jpegcompression</link> { * you do, leave them untouched. * Inluding less markers will make the * resulting code smaller, but there will - * be fewer aplications which can read it. + * be fewer applications which can read it. * The presence of the APP and COM marker * is influenced by APP_len and COM_len * ONLY, not by this property! */ @@ -565,6 +566,7 @@ struct <link linkend="v4l2-framebuffer">v4l2_framebuffer</link> { #define V4L2_FBUF_CAP_LOCAL_ALPHA 0x0010 #define V4L2_FBUF_CAP_GLOBAL_ALPHA 0x0020 #define V4L2_FBUF_CAP_LOCAL_INV_ALPHA 0x0040 +#define V4L2_FBUF_CAP_SRC_CHROMAKEY 0x0080 /* Flags for the 'flags' field. */ #define V4L2_FBUF_FLAG_PRIMARY 0x0001 #define V4L2_FBUF_FLAG_OVERLAY 0x0002 @@ -572,6 +574,7 @@ struct <link linkend="v4l2-framebuffer">v4l2_framebuffer</link> { #define V4L2_FBUF_FLAG_LOCAL_ALPHA 0x0008 #define V4L2_FBUF_FLAG_GLOBAL_ALPHA 0x0010 #define V4L2_FBUF_FLAG_LOCAL_INV_ALPHA 0x0020 +#define V4L2_FBUF_FLAG_SRC_CHROMAKEY 0x0040 struct <link linkend="v4l2-clip">v4l2_clip</link> { struct <link linkend="v4l2-rect">v4l2_rect</link> c; @@ -914,8 +917,10 @@ enum <link linkend="v4l2-colorfx">v4l2_colorfx</link> { #define V4L2_CID_AUTOBRIGHTNESS (V4L2_CID_BASE+32) #define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33) +#define V4L2_CID_ROTATE (V4L2_CID_BASE+34) +#define V4L2_CID_BG_COLOR (V4L2_CID_BASE+35) /* last CID + 1 */ -#define V4L2_CID_LASTP1 (V4L2_CID_BASE+34) +#define V4L2_CID_LASTP1 (V4L2_CID_BASE+36) /* MPEG-class control IDs defined by V4L2 */ #define V4L2_CID_MPEG_BASE (V4L2_CTRL_CLASS_MPEG | 0x900) diff --git a/Documentation/DocBook/v4l/vidioc-g-fbuf.xml b/Documentation/DocBook/v4l/vidioc-g-fbuf.xml index f7017062656..e7dda4822f0 100644 --- a/Documentation/DocBook/v4l/vidioc-g-fbuf.xml +++ b/Documentation/DocBook/v4l/vidioc-g-fbuf.xml @@ -336,6 +336,13 @@ alpha value. Alpha blending makes no sense for destructive overlays.</entry> inverted alpha channel of the framebuffer or VGA signal. Alpha blending makes no sense for destructive overlays.</entry> </row> + <row> + <entry><constant>V4L2_FBUF_CAP_SRC_CHROMAKEY</constant></entry> + <entry>0x0080</entry> + <entry>The device supports Source Chroma-keying. Framebuffer pixels +with the chroma-key colors are replaced by video pixels, which is exactly opposite of +<constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry> + </row> </tbody> </tgroup> </table> @@ -411,6 +418,16 @@ images, but with an inverted alpha value. The blend function is: output = framebuffer pixel * (1 - alpha) + video pixel * alpha. The actual alpha depth depends on the framebuffer pixel format.</entry> </row> + <row> + <entry><constant>V4L2_FBUF_FLAG_SRC_CHROMAKEY</constant></entry> + <entry>0x0040</entry> + <entry>Use source chroma-keying. The source chroma-key color is +determined by the <structfield>chromakey</structfield> field of +&v4l2-window; and negotiated with the &VIDIOC-S-FMT; ioctl, see <xref +linkend="overlay" /> and <xref linkend="osd" />. +Both chroma-keying are mutual exclusive to each other, so same +<structfield>chromakey</structfield> field of &v4l2-window; is being used.</entry> + </row> </tbody> </tgroup> </table> diff --git a/Documentation/DocBook/writing-an-alsa-driver.tmpl b/Documentation/DocBook/writing-an-alsa-driver.tmpl index 7a2e0e98986..0d0f7b4d4b1 100644 --- a/Documentation/DocBook/writing-an-alsa-driver.tmpl +++ b/Documentation/DocBook/writing-an-alsa-driver.tmpl @@ -5318,7 +5318,7 @@ struct _snd_pcm_runtime { pages of the given size and map them onto the virtually contiguous memory. The virtual pointer is addressed in runtime->dma_area. The physical address (runtime->dma_addr) is set to zero, - because the buffer is physically non-contigous. + because the buffer is physically non-contiguous. The physical address table is set up in sgbuf->table. You can get the physical address at a certain offset via <function>snd_pcm_sgbuf_get_addr()</function>. diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt index 187bbf10c92..8608fd85e92 100644 --- a/Documentation/RCU/trace.txt +++ b/Documentation/RCU/trace.txt @@ -1,185 +1,10 @@ CONFIG_RCU_TRACE debugfs Files and Formats -The rcupreempt and rcutree implementations of RCU provide debugfs trace -output that summarizes counters and state. This information is useful for -debugging RCU itself, and can sometimes also help to debug abuses of RCU. -Note that the rcuclassic implementation of RCU does not provide debugfs -trace output. - -The following sections describe the debugfs files and formats for -preemptable RCU (rcupreempt) and hierarchical RCU (rcutree). - - -Preemptable RCU debugfs Files and Formats - -This implementation of RCU provides three debugfs files under the -top-level directory RCU: rcu/rcuctrs (which displays the per-CPU -counters used by preemptable RCU) rcu/rcugp (which displays grace-period -counters), and rcu/rcustats (which internal counters for debugging RCU). - -The output of "cat rcu/rcuctrs" looks as follows: - -CPU last cur F M - 0 5 -5 0 0 - 1 -1 0 0 0 - 2 0 1 0 0 - 3 0 1 0 0 - 4 0 1 0 0 - 5 0 1 0 0 - 6 0 2 0 0 - 7 0 -1 0 0 - 8 0 1 0 0 -ggp = 26226, state = waitzero - -The per-CPU fields are as follows: - -o "CPU" gives the CPU number. Offline CPUs are not displayed. - -o "last" gives the value of the counter that is being decremented - for the current grace period phase. In the example above, - the counters sum to 4, indicating that there are still four - RCU read-side critical sections still running that started - before the last counter flip. - -o "cur" gives the value of the counter that is currently being - both incremented (by rcu_read_lock()) and decremented (by - rcu_read_unlock()). In the example above, the counters sum to - 1, indicating that there is only one RCU read-side critical section - still running that started after the last counter flip. - -o "F" indicates whether RCU is waiting for this CPU to acknowledge - a counter flip. In the above example, RCU is not waiting on any, - which is consistent with the state being "waitzero" rather than - "waitack". - -o "M" indicates whether RCU is waiting for this CPU to execute a - memory barrier. In the above example, RCU is not waiting on any, - which is consistent with the state being "waitzero" rather than - "waitmb". - -o "ggp" is the global grace-period counter. - -o "state" is the RCU state, which can be one of the following: - - o "idle": there is no grace period in progress. - - o "waitack": RCU just incremented the global grace-period - counter, which has the effect of reversing the roles of - the "last" and "cur" counters above, and is waiting for - all the CPUs to acknowledge the flip. Once the flip has - been acknowledged, CPUs will no longer be incrementing - what are now the "last" counters, so that their sum will - decrease monotonically down to zero. - - o "waitzero": RCU is waiting for the sum of the "last" counters - to decrease to zero. - - o "waitmb": RCU is waiting for each CPU to execute a memory - barrier, which ensures that instructions from a given CPU's - last RCU read-side critical section cannot be reordered - with instructions following the memory-barrier instruction. - -The output of "cat rcu/rcugp" looks as follows: - -oldggp=48870 newggp=48873 - -Note that reading from this file provokes a synchronize_rcu(). The -"oldggp" value is that of "ggp" from rcu/rcuctrs above, taken before -executing the synchronize_rcu(), and the "newggp" value is also the -"ggp" value, but taken after the synchronize_rcu() command returns. - - -The output of "cat rcu/rcugp" looks as follows: - -na=1337955 nl=40 wa=1337915 wl=44 da=1337871 dl=0 dr=1337871 di=1337871 -1=50989 e1=6138 i1=49722 ie1=82 g1=49640 a1=315203 ae1=265563 a2=49640 -z1=1401244 ze1=1351605 z2=49639 m1=5661253 me1=5611614 m2=49639 - -These are counters tracking internal preemptable-RCU events, however, -some of them may be useful for debugging algorithms using RCU. In -particular, the "nl", "wl", and "dl" values track the number of RCU -callbacks in various states. The fields are as follows: - -o "na" is the total number of RCU callbacks that have been enqueued - since boot. - -o "nl" is the number of RCU callbacks waiting for the previous - grace period to end so that they can start waiting on the next - grace period. - -o "wa" is the total number of RCU callbacks that have started waiting - for a grace period since boot. "na" should be roughly equal to - "nl" plus "wa". - -o "wl" is the number of RCU callbacks currently waiting for their - grace period to end. - -o "da" is the total number of RCU callbacks whose grace periods - have completed since boot. "wa" should be roughly equal to - "wl" plus "da". - -o "dr" is the total number of RCU callbacks that have been removed - from the list of callbacks ready to invoke. "dr" should be roughly - equal to "da". - -o "di" is the total number of RCU callbacks that have been invoked - since boot. "di" should be roughly equal to "da", though some - early versions of preemptable RCU had a bug so that only the - last CPU's count of invocations was displayed, rather than the - sum of all CPU's counts. - -o "1" is the number of calls to rcu_try_flip(). This should be - roughly equal to the sum of "e1", "i1", "a1", "z1", and "m1" - described below. In other words, the number of times that - the state machine is visited should be equal to the sum of the - number of times that each state is visited plus the number of - times that the state-machine lock acquisition failed. - -o "e1" is the number of times that rcu_try_flip() was unable to - acquire the fliplock. - -o "i1" is the number of calls to rcu_try_flip_idle(). - -o "ie1" is the number of times rcu_try_flip_idle() exited early - due to the calling CPU having no work for RCU. - -o "g1" is the number of times that rcu_try_flip_idle() decided - to start a new grace period. "i1" should be roughly equal to - "ie1" plus "g1". - -o "a1" is the number of calls to rcu_try_flip_waitack(). - -o "ae1" is the number of times that rcu_try_flip_waitack() found - that at least one CPU had not yet acknowledge the new grace period - (AKA "counter flip"). - -o "a2" is the number of time rcu_try_flip_waitack() found that - all CPUs had acknowledged. "a1" should be roughly equal to - "ae1" plus "a2". (This particular output was collected on - a 128-CPU machine, hence the smaller-than-usual fraction of - calls to rcu_try_flip_waitack() finding all CPUs having already - acknowledged.) - -o "z1" is the number of calls to rcu_try_flip_waitzero(). - -o "ze1" is the number of times that rcu_try_flip_waitzero() found - that not all of the old RCU read-side critical sections had - completed. - -o "z2" is the number of times that rcu_try_flip_waitzero() finds - the sum of the counters equal to zero, in other words, that - all of the old RCU read-side critical sections had completed. - The value of "z1" should be roughly equal to "ze1" plus - "z2". - -o "m1" is the number of calls to rcu_try_flip_waitmb(). - -o "me1" is the number of times that rcu_try_flip_waitmb() finds - that at least one CPU has not yet executed a memory barrier. - -o "m2" is the number of times that rcu_try_flip_waitmb() finds that - all CPUs have executed a memory barrier. +The rcutree implementation of RCU provides debugfs trace output that +summarizes counters and state. This information is useful for debugging +RCU itself, and can sometimes also help to debug abuses of RCU. +The following sections describe the debugfs files and formats. Hierarchical RCU debugfs Files and Formats @@ -210,9 +35,10 @@ rcu_bh: 6 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=859/1 dn=0 df=15 of=0 ri=0 ql=0 b=10 7 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=3761/1 dn=0 df=15 of=0 ri=0 ql=0 b=10 -The first section lists the rcu_data structures for rcu, the second for -rcu_bh. Each section has one line per CPU, or eight for this 8-CPU system. -The fields are as follows: +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: o The number at the beginning of each line is the CPU number. CPUs numbers followed by an exclamation mark are offline, @@ -223,9 +49,9 @@ o The number at the beginning of each line is the CPU number. o "c" is the count of grace periods that this CPU believes have completed. CPUs in dynticks idle mode may lag quite a ways - behind, for example, CPU 4 under "rcu" above, which has slept - through the past 25 RCU grace periods. It is not unusual to - see CPUs lagging by thousands of grace periods. + behind, for example, CPU 4 under "rcu_sched" above, which has + slept through the past 25 RCU grace periods. It is not unusual + to see CPUs lagging by thousands of grace periods. o "g" is the count of grace periods that this CPU believes have started. Again, CPUs in dynticks idle mode may lag behind. @@ -308,8 +134,10 @@ The output of "cat rcu/rcugp" looks as follows: rcu_sched: completed=33062 gpnum=33063 rcu_bh: completed=464 gpnum=464 -Again, this output is for both "rcu" and "rcu_bh". The fields are -taken from the rcu_state structure, and are as follows: +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: o "completed" is the number of grace periods that have completed. It is comparable to the "c" field from rcu/rcudata in that a @@ -324,23 +152,24 @@ o "gpnum" is the number of grace periods that have started. It is 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" above), then an RCU grace period is in progress. + do for "rcu_sched" above), then an RCU grace period is in progress. The output of "cat rcu/rcuhier" looks as follows, with very long lines: -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 +c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6 oqlen=0 +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=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0 oqlen=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 -This is once again split into "rcu" and "rcu_bh" portions. The fields are -as follows: +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: o "c" is exactly the same as "completed" under rcu/rcugp. @@ -372,6 +201,11 @@ 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 "oqlen" is the number of callbacks on the "orphan" callback + list. RCU callbacks are placed on this list by CPUs going + offline, and are "adopted" either by the CPU helping the outgoing + CPU or by the next rcu_barrier*() call, whichever comes first. + 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 @@ -379,7 +213,7 @@ o Each element of the form "1/1 0:127 ^0" represents one struct 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 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 @@ -389,10 +223,19 @@ o Each element of the form "1/1 0:127 ^0" represents one struct The value of qsmaskinit is assigned to that of qsmask at the beginning of each grace period. - For example, for "rcu", 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. + 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 "T" preceding the ">" + indicates that at least one task blocked in an RCU + read-side critical section blocks the current grace + period, while a "." preceding the ">" indicates otherwise. + The character following the ">" indicates similarly for + the next grace period. A "T" should appear in this + field only for rcu-preempt. o The numbers separated by the ":" are the range of CPUs served by this struct rcu_node. This can be helpful @@ -431,8 +274,9 @@ rcu_bh: 6 np=120834 qsp=9902 cbr=0 cng=0 gpc=6 gps=3 nf=2 nn=110921 7 np=144888 qsp=26336 cbr=0 cng=0 gpc=8 gps=2 nf=0 nn=118542 -As always, this is once again split into "rcu" and "rcu_bh" portions. -The fields are as follows: +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: o "np" is the number of times that __rcu_pending() has been invoked for the corresponding flavor of RCU. diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt index e41a7fecf0d..d542ca243b8 100644 --- a/Documentation/RCU/whatisRCU.txt +++ b/Documentation/RCU/whatisRCU.txt @@ -830,7 +830,7 @@ sched: Critical sections Grace period Barrier SRCU: Critical sections Grace period Barrier srcu_read_lock synchronize_srcu N/A - srcu_read_unlock + srcu_read_unlock synchronize_srcu_expedited SRCU: Initialization/cleanup init_srcu_struct diff --git a/Documentation/arm/OMAP/DSS b/Documentation/arm/OMAP/DSS new file mode 100644 index 00000000000..0af0e9eed5d --- /dev/null +++ b/Documentation/arm/OMAP/DSS @@ -0,0 +1,317 @@ +OMAP2/3 Display Subsystem +------------------------- + +This is an almost total rewrite of the OMAP FB driver in drivers/video/omap +(let's call it DSS1). The main differences between DSS1 and DSS2 are DSI, +TV-out and multiple display support, but there are lots of small improvements +also. + +The DSS2 driver (omapdss module) is in arch/arm/plat-omap/dss/, and the FB, +panel and controller drivers are in drivers/video/omap2/. DSS1 and DSS2 live +currently side by side, you can choose which one to use. + +Features +-------- + +Working and tested features include: + +- MIPI DPI (parallel) output +- MIPI DSI output in command mode +- MIPI DBI (RFBI) output +- SDI output +- TV output +- All pieces can be compiled as a module or inside kernel +- Use DISPC to update any of the outputs +- Use CPU to update RFBI or DSI output +- OMAP DISPC planes +- RGB16, RGB24 packed, RGB24 unpacked +- YUV2, UYVY +- Scaling +- Adjusting DSS FCK to find a good pixel clock +- Use DSI DPLL to create DSS FCK + +Tested boards include: +- OMAP3 SDP board +- Beagle board +- N810 + +omapdss driver +-------------- + +The DSS driver does not itself have any support for Linux framebuffer, V4L or +such like the current ones, but it has an internal kernel API that upper level +drivers can use. + +The DSS driver models OMAP's overlays, overlay managers and displays in a +flexible way to enable non-common multi-display configuration. In addition to +modelling the hardware overlays, omapdss supports virtual overlays and overlay +managers. These can be used when updating a display with CPU or system DMA. + +Panel and controller drivers +---------------------------- + +The drivers implement panel or controller specific functionality and are not +usually visible to users except through omapfb driver. They register +themselves to the DSS driver. + +omapfb driver +------------- + +The omapfb driver implements arbitrary number of standard linux framebuffers. +These framebuffers can be routed flexibly to any overlays, thus allowing very +dynamic display architecture. + +The driver exports some omapfb specific ioctls, which are compatible with the +ioctls in the old driver. + +The rest of the non standard features are exported via sysfs. Whether the final +implementation will use sysfs, or ioctls, is still open. + +V4L2 drivers +------------ + +V4L2 is being implemented in TI. + +From omapdss point of view the V4L2 drivers should be similar to framebuffer +driver. + +Architecture +-------------------- + +Some clarification what the different components do: + + - Framebuffer is a memory area inside OMAP's SRAM/SDRAM that contains the + pixel data for the image. Framebuffer has width and height and color + depth. + - Overlay defines where the pixels are read from and where they go on the + screen. The overlay may be smaller than framebuffer, thus displaying only + part of the framebuffer. The position of the overlay may be changed if + the overlay is smaller than the display. + - Overlay manager combines the overlays in to one image and feeds them to + display. + - Display is the actual physical display device. + +A framebuffer can be connected to multiple overlays to show the same pixel data +on all of the overlays. Note that in this case the overlay input sizes must be +the same, but, in case of video overlays, the output size can be different. Any +framebuffer can be connected to any overlay. + +An overlay can be connected to one overlay manager. Also DISPC overlays can be +connected only to DISPC overlay managers, and virtual overlays can be only +connected to virtual overlays. + +An overlay manager can be connected to one display. There are certain +restrictions which kinds of displays an overlay manager can be connected: + + - DISPC TV overlay manager can be only connected to TV display. + - Virtual overlay managers can only be connected to DBI or DSI displays. + - DISPC LCD overlay manager can be connected to all displays, except TV + display. + +Sysfs +----- +The sysfs interface is mainly used for testing. I don't think sysfs +interface is the best for this in the final version, but I don't quite know +what would be the best interfaces for these things. + +The sysfs interface is divided to two parts: DSS and FB. + +/sys/class/graphics/fb? directory: +mirror 0=off, 1=on +rotate Rotation 0-3 for 0, 90, 180, 270 degrees +rotate_type 0 = DMA rotation, 1 = VRFB rotation +overlays List of overlay numbers to which framebuffer pixels go +phys_addr Physical address of the framebuffer +virt_addr Virtual address of the framebuffer +size Size of the framebuffer + +/sys/devices/platform/omapdss/overlay? directory: +enabled 0=off, 1=on +input_size width,height (ie. the framebuffer size) +manager Destination overlay manager name +name +output_size width,height +position x,y +screen_width width +global_alpha global alpha 0-255 0=transparent 255=opaque + +/sys/devices/platform/omapdss/manager? directory: +display Destination display +name +alpha_blending_enabled 0=off, 1=on +trans_key_enabled 0=off, 1=on +trans_key_type gfx-destination, video-source +trans_key_value transparency color key (RGB24) +default_color default background color (RGB24) + +/sys/devices/platform/omapdss/display? directory: +ctrl_name Controller name +mirror 0=off, 1=on +update_mode 0=off, 1=auto, 2=manual +enabled 0=off, 1=on +name +rotate Rotation 0-3 for 0, 90, 180, 270 degrees +timings Display timings (pixclock,xres/hfp/hbp/hsw,yres/vfp/vbp/vsw) + When writing, two special timings are accepted for tv-out: + "pal" and "ntsc" +panel_name +tear_elim Tearing elimination 0=off, 1=on + +There are also some debugfs files at <debugfs>/omapdss/ which show information +about clocks and registers. + +Examples +-------- + +The following definitions have been made for the examples below: + +ovl0=/sys/devices/platform/omapdss/overlay0 +ovl1=/sys/devices/platform/omapdss/overlay1 +ovl2=/sys/devices/platform/omapdss/overlay2 + +mgr0=/sys/devices/platform/omapdss/manager0 +mgr1=/sys/devices/platform/omapdss/manager1 + +lcd=/sys/devices/platform/omapdss/display0 +dvi=/sys/devices/platform/omapdss/display1 +tv=/sys/devices/platform/omapdss/display2 + +fb0=/sys/class/graphics/fb0 +fb1=/sys/class/graphics/fb1 +fb2=/sys/class/graphics/fb2 + +Default setup on OMAP3 SDP +-------------------------- + +Here's the default setup on OMAP3 SDP board. All planes go to LCD. DVI +and TV-out are not in use. The columns from left to right are: +framebuffers, overlays, overlay managers, displays. Framebuffers are +handled by omapfb, and the rest by the DSS. + +FB0 --- GFX -\ DVI +FB1 --- VID1 --+- LCD ---- LCD +FB2 --- VID2 -/ TV ----- TV + +Example: Switch from LCD to DVI +---------------------- + +w=`cat $dvi/timings | cut -d "," -f 2 | cut -d "/" -f 1` +h=`cat $dvi/timings | cut -d "," -f 3 | cut -d "/" -f 1` + +echo "0" > $lcd/enabled +echo "" > $mgr0/display +fbset -fb /dev/fb0 -xres $w -yres $h -vxres $w -vyres $h +# at this point you have to switch the dvi/lcd dip-switch from the omap board +echo "dvi" > $mgr0/display +echo "1" > $dvi/enabled + +After this the configuration looks like: + +FB0 --- GFX -\ -- DVI +FB1 --- VID1 --+- LCD -/ LCD +FB2 --- VID2 -/ TV ----- TV + +Example: Clone GFX overlay to LCD and TV +------------------------------- + +w=`cat $tv/timings | cut -d "," -f 2 | cut -d "/" -f 1` +h=`cat $tv/timings | cut -d "," -f 3 | cut -d "/" -f 1` + +echo "0" > $ovl0/enabled +echo "0" > $ovl1/enabled + +echo "" > $fb1/overlays +echo "0,1" > $fb0/overlays + +echo "$w,$h" > $ovl1/output_size +echo "tv" > $ovl1/manager + +echo "1" > $ovl0/enabled +echo "1" > $ovl1/enabled + +echo "1" > $tv/enabled + +After this the configuration looks like (only relevant parts shown): + +FB0 +-- GFX ---- LCD ---- LCD + \- VID1 ---- TV ---- TV + +Misc notes +---------- + +OMAP FB allocates the framebuffer memory using the OMAP VRAM allocator. + +Using DSI DPLL to generate pixel clock it is possible produce the pixel clock +of 86.5MHz (max possible), and with that you get 1280x1024@57 output from DVI. + +Rotation and mirroring currently only supports RGB565 and RGB8888 modes. VRFB +does not support mirroring. + +VRFB rotation requires much more memory than non-rotated framebuffer, so you +probably need to increase your vram setting before using VRFB rotation. Also, +many applications may not work with VRFB if they do not pay attention to all +framebuffer parameters. + +Kernel boot arguments +--------------------- + +vram=<size> + - Amount of total VRAM to preallocate. For example, "10M". omapfb + allocates memory for framebuffers from VRAM. + +omapfb.mode=<display>:<mode>[,...] + - Default video mode for specified displays. For example, + "dvi:800x400MR-24@60". See drivers/video/modedb.c. + There are also two special modes: "pal" and "ntsc" that + can be used to tv out. + +omapfb.vram=<fbnum>:<size>[@<physaddr>][,...] + - VRAM allocated for a framebuffer. Normally omapfb allocates vram + depending on the display size. With this you can manually allocate + more or define the physical address of each framebuffer. For example, + "1:4M" to allocate 4M for fb1. + +omapfb.debug=<y|n> + - Enable debug printing. You have to have OMAPFB debug support enabled + in kernel config. + +omapfb.test=<y|n> + - Draw test pattern to framebuffer whenever framebuffer settings change. + You need to have OMAPFB debug support enabled in kernel config. + +omapfb.vrfb=<y|n> + - Use VRFB rotation for all framebuffers. + +omapfb.rotate=<angle> + - Default rotation applied to all framebuffers. + 0 - 0 degree rotation + 1 - 90 degree rotation + 2 - 180 degree rotation + 3 - 270 degree rotation + +omapfb.mirror=<y|n> + - Default mirror for all framebuffers. Only works with DMA rotation. + +omapdss.def_disp=<display> + - Name of default display, to which all overlays will be connected. + Common examples are "lcd" or "tv". + +omapdss.debug=<y|n> + - Enable debug printing. You have to have DSS debug support enabled in + kernel config. + +TODO +---- + +DSS locking + +Error checking +- Lots of checks are missing or implemented just as BUG() + +System DMA update for DSI +- Can be used for RGB16 and RGB24P modes. Probably not for RGB24U (how + to skip the empty byte?) + +OMAP1 support +- Not sure if needed + diff --git a/Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt b/Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt index 26422f0f908..b87292e05f2 100644 --- a/Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt +++ b/Documentation/arm/Samsung-S3C24XX/EB2410ITX.txt @@ -55,4 +55,4 @@ Maintainers This board is maintained by Simtec Electronics. -(c) 2004 Ben Dooks, Simtec Electronics +Copyright 2004 Ben Dooks, Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/GPIO.txt b/Documentation/arm/Samsung-S3C24XX/GPIO.txt index 948c8718d96..2af2cf39915 100644 --- a/Documentation/arm/Samsung-S3C24XX/GPIO.txt +++ b/Documentation/arm/Samsung-S3C24XX/GPIO.txt @@ -134,4 +134,4 @@ Authour Ben Dooks, 03 October 2004 -(c) 2004 Ben Dooks, Simtec Electronics +Copyright 2004 Ben Dooks, Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/Overview.txt b/Documentation/arm/Samsung-S3C24XX/Overview.txt index cff6227b448..081892df4fd 100644 --- a/Documentation/arm/Samsung-S3C24XX/Overview.txt +++ b/Documentation/arm/Samsung-S3C24XX/Overview.txt @@ -299,4 +299,4 @@ Port Contributors Document Author --------------- -Ben Dooks, (c) 2004-2005,2006 Simtec Electronics +Ben Dooks, Copyright 2004-2006 Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/S3C2412.txt b/Documentation/arm/Samsung-S3C24XX/S3C2412.txt index 295d971a15e..f057876b920 100644 --- a/Documentation/arm/Samsung-S3C24XX/S3C2412.txt +++ b/Documentation/arm/Samsung-S3C24XX/S3C2412.txt @@ -117,4 +117,4 @@ ATA Document Author --------------- -Ben Dooks, (c) 2006 Simtec Electronics +Ben Dooks, Copyright 2006 Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/S3C2413.txt b/Documentation/arm/Samsung-S3C24XX/S3C2413.txt index ab2a88858f1..909bdc7dd7b 100644 --- a/Documentation/arm/Samsung-S3C24XX/S3C2413.txt +++ b/Documentation/arm/Samsung-S3C24XX/S3C2413.txt @@ -18,4 +18,4 @@ Camera Interface Document Author --------------- -Ben Dooks, (c) 2006 Simtec Electronics +Ben Dooks, Copyright 2006 Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/Suspend.txt b/Documentation/arm/Samsung-S3C24XX/Suspend.txt index a30fe510572..7edd0e2e6c5 100644 --- a/Documentation/arm/Samsung-S3C24XX/Suspend.txt +++ b/Documentation/arm/Samsung-S3C24XX/Suspend.txt @@ -133,5 +133,5 @@ Configuration Document Author --------------- -Ben Dooks, (c) 2004 Simtec Electronics +Ben Dooks, Copyright 2004 Simtec Electronics diff --git a/Documentation/arm/Samsung-S3C24XX/USB-Host.txt b/Documentation/arm/Samsung-S3C24XX/USB-Host.txt index 67671eba423..f82b1faefad 100644 --- a/Documentation/arm/Samsung-S3C24XX/USB-Host.txt +++ b/Documentation/arm/Samsung-S3C24XX/USB-Host.txt @@ -90,4 +90,4 @@ Platform Data Document Author --------------- -Ben Dooks, (c) 2005 Simtec Electronics +Ben Dooks, Copyright 2005 Simtec 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style="font-size:318px;font-weight:400;fill:#000000;visibility:visible;font-family:Helvetica embedded"> + <tspan + x="1626 1732 1893 2071 2231 2409 2672 2849 2921 3099 3188 3366 3544 3616 3793 3899" + y="22331" + id="tspan997">rs_complete_io()</tspan> + </text> + <text + id="text1011" + style="font-size:318px;font-weight:400;fill:#000000;visibility:visible;font-family:Helvetica embedded"> + <tspan + x="16027 16133 16294 16472 16649 16827 17005 17077 17255 17432 17504 17682 17788" + y="18402" + id="tspan1013">rs_begin_io()</tspan> + </text> + <text + id="text1027" + style="font-size:318px;font-weight:400;fill:#000000;visibility:visible;font-family:Helvetica embedded"> + <tspan + x="16115 16221 16382 16560 16720 16898 17161 17338 17410 17588 17677 17855 18033 18105 18282 18388" + y="20331" + id="tspan1029">rs_complete_io()</tspan> + </text> +</svg> diff --git a/Documentation/blockdev/drbd/README.txt b/Documentation/blockdev/drbd/README.txt new file mode 100644 index 00000000000..627b0a1bf35 --- /dev/null +++ b/Documentation/blockdev/drbd/README.txt @@ -0,0 +1,16 @@ +Description + + DRBD is a shared-nothing, synchronously replicated block device. It + is designed to serve as a building block for high availability + clusters and in this context, is a "drop-in" replacement for shared + storage. Simplistically, you could see it as a network RAID 1. + + Please visit http://www.drbd.org to find out more. + +The here included files are intended to help understand the implementation + +DRBD-8.3-data-packets.svg, DRBD-data-packets.svg + relates some functions, and write packets. + +conn-states-8.dot, disk-states-8.dot, node-states-8.dot + The sub graphs of DRBD's state transitions diff --git a/Documentation/blockdev/drbd/conn-states-8.dot b/Documentation/blockdev/drbd/conn-states-8.dot new file mode 100644 index 00000000000..025e8cf5e64 --- /dev/null +++ b/Documentation/blockdev/drbd/conn-states-8.dot @@ -0,0 +1,18 @@ +digraph conn_states { + StandAllone -> WFConnection [ label = "ioctl_set_net()" ] + WFConnection -> Unconnected [ label = "unable to bind()" ] + WFConnection -> WFReportParams [ label = "in connect() after accept" ] + WFReportParams -> StandAllone [ label = "checks in receive_param()" ] + WFReportParams -> Connected [ label = "in receive_param()" ] + WFReportParams -> WFBitMapS [ label = "sync_handshake()" ] + WFReportParams -> WFBitMapT [ label = "sync_handshake()" ] + WFBitMapS -> SyncSource [ label = "receive_bitmap()" ] + WFBitMapT -> SyncTarget [ label = "receive_bitmap()" ] + SyncSource -> Connected + SyncTarget -> Connected + SyncSource -> PausedSyncS + SyncTarget -> PausedSyncT + PausedSyncS -> SyncSource + PausedSyncT -> SyncTarget + Connected -> WFConnection [ label = "* on network error" ] +} diff --git a/Documentation/blockdev/drbd/disk-states-8.dot b/Documentation/blockdev/drbd/disk-states-8.dot new file mode 100644 index 00000000000..d06cfb46fb9 --- /dev/null +++ b/Documentation/blockdev/drbd/disk-states-8.dot @@ -0,0 +1,16 @@ +digraph disk_states { + Diskless -> Inconsistent [ label = "ioctl_set_disk()" ] + Diskless -> Consistent [ label = "ioctl_set_disk()" ] + Diskless -> Outdated [ label = "ioctl_set_disk()" ] + Consistent -> Outdated [ label = "receive_param()" ] + Consistent -> UpToDate [ label = "receive_param()" ] + Consistent -> Inconsistent [ label = "start resync" ] + Outdated -> Inconsistent [ label = "start resync" ] + UpToDate -> Inconsistent [ label = "ioctl_replicate" ] + Inconsistent -> UpToDate [ label = "resync completed" ] + Consistent -> Failed [ label = "io completion error" ] + Outdated -> Failed [ label = "io completion error" ] + UpToDate -> Failed [ label = "io completion error" ] + Inconsistent -> Failed [ label = "io completion error" ] + Failed -> Diskless [ label = "sending notify to peer" ] +} diff --git a/Documentation/blockdev/drbd/drbd-connection-state-overview.dot b/Documentation/blockdev/drbd/drbd-connection-state-overview.dot new file mode 100644 index 00000000000..6d9cf0a7b11 --- /dev/null +++ b/Documentation/blockdev/drbd/drbd-connection-state-overview.dot @@ -0,0 +1,85 @@ +// vim: set sw=2 sts=2 : +digraph { + rankdir=BT + bgcolor=white + + node [shape=plaintext] + node [fontcolor=black] + + StandAlone [ style=filled,fillcolor=gray,label=StandAlone ] + + node [fontcolor=lightgray] + + Unconnected [ label=Unconnected ] + + CommTrouble [ shape=record, + label="{communication loss|{Timeout|BrokenPipe|NetworkFailure}}" ] + + node [fontcolor=gray] + + subgraph cluster_try_connect { + label="try to connect, handshake" + rank=max + WFConnection [ label=WFConnection ] + WFReportParams [ label=WFReportParams ] + } + + TearDown [ label=TearDown ] + + Connected [ label=Connected,style=filled,fillcolor=green,fontcolor=black ] + + node [fontcolor=lightblue] + + StartingSyncS [ label=StartingSyncS ] + StartingSyncT [ label=StartingSyncT ] + + subgraph cluster_bitmap_exchange { + node [fontcolor=red] + fontcolor=red + label="new application (WRITE?) requests blocked\lwhile bitmap is exchanged" + + WFBitMapT [ label=WFBitMapT ] + WFSyncUUID [ label=WFSyncUUID ] + WFBitMapS [ label=WFBitMapS ] + } + + node [fontcolor=blue] + + cluster_resync [ shape=record,label="{<any>resynchronisation process running\l'concurrent' application requests allowed|{{<T>PausedSyncT\nSyncTarget}|{<S>PausedSyncS\nSyncSource}}}" ] + + node [shape=box,fontcolor=black] + + // drbdadm [label="drbdadm connect"] + // handshake [label="drbd_connect()\ndrbd_do_handshake\ndrbd_sync_handshake() etc."] + // comm_error [label="communication trouble"] + + // + // edges + // -------------------------------------- + + StandAlone -> Unconnected [ label="drbdadm connect" ] + Unconnected -> StandAlone [ label="drbdadm disconnect\lor serious communication trouble" ] + Unconnected -> WFConnection [ label="receiver thread is started" ] + WFConnection -> WFReportParams [ headlabel="accept()\land/or \lconnect()\l" ] + + WFReportParams -> StandAlone [ label="during handshake\lpeers do not agree\labout something essential" ] + WFReportParams -> Connected [ label="data identical\lno sync needed",color=green,fontcolor=green ] + + WFReportParams -> WFBitMapS + WFReportParams -> WFBitMapT + WFBitMapT -> WFSyncUUID [minlen=0.1,constraint=false] + + WFBitMapS -> cluster_resync:S + WFSyncUUID -> cluster_resync:T + + edge [color=green] + cluster_resync:any -> Connected [ label="resnyc done",fontcolor=green ] + + edge [color=red] + WFReportParams -> CommTrouble + Connected -> CommTrouble + cluster_resync:any -> CommTrouble + edge [color=black] + CommTrouble -> Unconnected [label="receiver thread is stopped" ] + +} diff --git a/Documentation/blockdev/drbd/node-states-8.dot b/Documentation/blockdev/drbd/node-states-8.dot new file mode 100644 index 00000000000..4a2b00c2354 --- /dev/null +++ b/Documentation/blockdev/drbd/node-states-8.dot @@ -0,0 +1,14 @@ +digraph node_states { + Secondary -> Primary [ label = "ioctl_set_state()" ] + Primary -> Secondary [ label = "ioctl_set_state()" ] +} + +digraph peer_states { + Secondary -> Primary [ label = "recv state packet" ] + Primary -> Secondary [ label = "recv state packet" ] + Primary -> Unknown [ label = "connection lost" ] + Secondary -> Unknown [ label = "connection lost" ] + Unknown -> Primary [ label = "connected" ] + Unknown -> Secondary [ label = "connected" ] +} + diff --git a/Documentation/cgroups/blkio-controller.txt b/Documentation/cgroups/blkio-controller.txt new file mode 100644 index 00000000000..630879cd9a4 --- /dev/null +++ b/Documentation/cgroups/blkio-controller.txt @@ -0,0 +1,135 @@ + Block IO Controller + =================== +Overview +======== +cgroup subsys "blkio" implements the block io controller. There seems to be +a need of various kinds of IO control policies (like proportional BW, max BW) +both at leaf nodes as well as at intermediate nodes in a storage hierarchy. +Plan is to use the same cgroup based management interface for blkio controller +and based on user options switch IO policies in the background. + +In the first phase, this patchset implements proportional weight time based +division of disk policy. It is implemented in CFQ. Hence this policy takes +effect only on leaf nodes when CFQ is being used. + +HOWTO +===== +You can do a very simple testing of running two dd threads in two different +cgroups. Here is what you can do. + +- Enable group scheduling in CFQ + CONFIG_CFQ_GROUP_IOSCHED=y + +- Compile and boot into kernel and mount IO controller (blkio). + + mount -t cgroup -o blkio none /cgroup + +- Create two cgroups + mkdir -p /cgroup/test1/ /cgroup/test2 + +- Set weights of group test1 and test2 + echo 1000 > /cgroup/test1/blkio.weight + echo 500 > /cgroup/test2/blkio.weight + +- Create two same size files (say 512MB each) on same disk (file1, file2) and + launch two dd threads in different cgroup to read those files. + + sync + echo 3 > /proc/sys/vm/drop_caches + + dd if=/mnt/sdb/zerofile1 of=/dev/null & + echo $! > /cgroup/test1/tasks + cat /cgroup/test1/tasks + + dd if=/mnt/sdb/zerofile2 of=/dev/null & + echo $! > /cgroup/test2/tasks + cat /cgroup/test2/tasks + +- At macro level, first dd should finish first. To get more precise data, keep + on looking at (with the help of script), at blkio.disk_time and + blkio.disk_sectors files of both test1 and test2 groups. This will tell how + much disk time (in milli seconds), each group got and how many secotors each + group dispatched to the disk. We provide fairness in terms of disk time, so + ideally io.disk_time of cgroups should be in proportion to the weight. + +Various user visible config options +=================================== +CONFIG_CFQ_GROUP_IOSCHED + - Enables group scheduling in CFQ. Currently only 1 level of group + creation is allowed. + +CONFIG_DEBUG_CFQ_IOSCHED + - Enables some debugging messages in blktrace. Also creates extra + cgroup file blkio.dequeue. + +Config options selected automatically +===================================== +These config options are not user visible and are selected/deselected +automatically based on IO scheduler configuration. + +CONFIG_BLK_CGROUP + - Block IO controller. Selected by CONFIG_CFQ_GROUP_IOSCHED. + +CONFIG_DEBUG_BLK_CGROUP + - Debug help. Selected by CONFIG_DEBUG_CFQ_IOSCHED. + +Details of cgroup files +======================= +- blkio.weight + - Specifies per cgroup weight. + + Currently allowed range of weights is from 100 to 1000. + +- blkio.time + - disk time allocated to cgroup per device in milliseconds. First + two fields specify the major and minor number of the device and + third field specifies the disk time allocated to group in + milliseconds. + +- blkio.sectors + - number of sectors transferred to/from disk by the group. First + two fields specify the major and minor number of the device and + third field specifies the number of sectors transferred by the + group to/from the device. + +- blkio.dequeue + - Debugging aid only enabled if CONFIG_DEBUG_CFQ_IOSCHED=y. This + gives the statistics about how many a times a group was dequeued + from service tree of the device. First two fields specify the major + and minor number of the device and third field specifies the number + of times a group was dequeued from a particular device. + +CFQ sysfs tunable +================= +/sys/block/<disk>/queue/iosched/group_isolation + +If group_isolation=1, it provides stronger isolation between groups at the +expense of throughput. By default group_isolation is 0. In general that +means that if group_isolation=0, expect fairness for sequential workload +only. Set group_isolation=1 to see fairness for random IO workload also. + +Generally CFQ will put random seeky workload in sync-noidle category. CFQ +will disable idling on these queues and it does a collective idling on group +of such queues. Generally these are slow moving queues and if there is a +sync-noidle service tree in each group, that group gets exclusive access to +disk for certain period. That means it will bring the throughput down if +group does not have enough IO to drive deeper queue depths and utilize disk +capacity to the fullest in the slice allocated to it. But the flip side is +that even a random reader should get better latencies and overall throughput +if there are lots of sequential readers/sync-idle workload running in the +system. + +If group_isolation=0, then CFQ automatically moves all the random seeky queues +in the root group. That means there will be no service differentiation for +that kind of workload. This leads to better throughput as we do collective +idling on root sync-noidle tree. + +By default one should run with group_isolation=0. If that is not sufficient +and one wants stronger isolation between groups, then set group_isolation=1 +but this will come at cost of reduced throughput. + +What works +========== +- Currently only sync IO queues are support. All the buffered writes are + still system wide and not per group. Hence we will not see service + differentiation between buffered writes between groups. diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index 455d4e6d346..0b33bfe7dde 100644 --- a/Documentation/cgroups/cgroups.txt +++ b/Documentation/cgroups/cgroups.txt @@ -227,7 +227,14 @@ as the path relative to the root of the cgroup file system. Each cgroup is represented by a directory in the cgroup file system containing the following files describing that cgroup: - - tasks: list of tasks (by pid) attached to that cgroup + - tasks: list of tasks (by pid) attached to that cgroup. This list + is not guaranteed to be sorted. Writing a thread id into this file + moves the thread into this cgroup. + - cgroup.procs: list of tgids in the cgroup. This list is not + guaranteed to be sorted or free of duplicate tgids, and userspace + should sort/uniquify the list if this property is required. + Writing a tgid into this file moves all threads with that tgid into + this cgroup. - notify_on_release flag: run the release agent on exit? - release_agent: the path to use for release notifications (this file exists in the top cgroup only) @@ -374,7 +381,7 @@ Now you want to do something with this cgroup. In this directory you can find several files: # ls -notify_on_release tasks +cgroup.procs notify_on_release tasks (plus whatever files added by the attached subsystems) Now attach your shell to this cgroup: diff --git a/Documentation/cpu-freq/cpu-drivers.txt b/Documentation/cpu-freq/cpu-drivers.txt index 75a58d14d3c..6c30e930c12 100644 --- a/Documentation/cpu-freq/cpu-drivers.txt +++ b/Documentation/cpu-freq/cpu-drivers.txt @@ -92,9 +92,9 @@ policy->cpuinfo.max_freq - the minimum and maximum frequency (in kHz) which is supported by this CPU policy->cpuinfo.transition_latency the time it takes on this CPU to - switch between two frequencies (if - appropriate, else specify - CPUFREQ_ETERNAL) + switch between two frequencies in + nanoseconds (if appropriate, else + specify CPUFREQ_ETERNAL) policy->cur The current operating frequency of this CPU (if appropriate) diff --git a/Documentation/cpu-freq/user-guide.txt b/Documentation/cpu-freq/user-guide.txt index 2a5b850847c..04f6b32993e 100644 --- a/Documentation/cpu-freq/user-guide.txt +++ b/Documentation/cpu-freq/user-guide.txt @@ -203,6 +203,17 @@ scaling_cur_freq : Current frequency of the CPU as determined by the frequency the kernel thinks the CPU runs at. +bios_limit : If the BIOS tells the OS to limit a CPU to + lower frequencies, the user can read out the + maximum available frequency from this file. + This typically can happen through (often not + intended) BIOS settings, restrictions + triggered through a service processor or other + BIOS/HW based implementations. + This does not cover thermal ACPI limitations + which can be detected through the generic + thermal driver. + If you have selected the "userspace" governor which allows you to set the CPU operating frequency to a specific value, you can read out the current frequency in diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt index b41f3e58aef..f1c5c4bccd3 100644 --- a/Documentation/cputopology.txt +++ b/Documentation/cputopology.txt @@ -1,15 +1,28 @@ -Export cpu topology info via sysfs. Items (attributes) are similar +Export CPU topology info via sysfs. Items (attributes) are similar to /proc/cpuinfo. 1) /sys/devices/system/cpu/cpuX/topology/physical_package_id: -represent the physical package id of cpu X; + + physical package id of cpuX. Typically corresponds to a physical + socket number, but the actual value is architecture and platform + dependent. + 2) /sys/devices/system/cpu/cpuX/topology/core_id: -represent the cpu core id to cpu X; + + the CPU core ID of cpuX. Typically it is the hardware platform's + identifier (rather than the kernel's). The actual value is + architecture and platform dependent. + 3) /sys/devices/system/cpu/cpuX/topology/thread_siblings: -represent the thread siblings to cpu X in the same core; + + internel kernel map of cpuX's hardware threads within the same + core as cpuX + 4) /sys/devices/system/cpu/cpuX/topology/core_siblings: -represent the thread siblings to cpu X in the same physical package; + + internal kernel map of cpuX's hardware threads within the same + physical_package_id. To implement it in an architecture-neutral way, a new source file, drivers/base/topology.c, is to export the 4 attributes. @@ -32,32 +45,32 @@ not defined by include/asm-XXX/topology.h: 3) thread_siblings: just the given CPU 4) core_siblings: just the given CPU -Additionally, cpu topology information is provided under +Additionally, CPU topology information is provided under /sys/devices/system/cpu and includes these files. The internal source for the output is in brackets ("[]"). - kernel_max: the maximum cpu index allowed by the kernel configuration. + kernel_max: the maximum CPU index allowed by the kernel configuration. [NR_CPUS-1] - offline: cpus that are not online because they have been + offline: CPUs that are not online because they have been HOTPLUGGED off (see cpu-hotplug.txt) or exceed the limit - of cpus allowed by the kernel configuration (kernel_max + of CPUs allowed by the kernel configuration (kernel_max above). [~cpu_online_mask + cpus >= NR_CPUS] - online: cpus that are online and being scheduled [cpu_online_mask] + online: CPUs that are online and being scheduled [cpu_online_mask] - possible: cpus that have been allocated resources and can be + possible: CPUs that have been allocated resources and can be brought online if they are present. [cpu_possible_mask] - present: cpus that have been identified as being present in the + present: CPUs that have been identified as being present in the system. [cpu_present_mask] The format for the above output is compatible with cpulist_parse() [see <linux/cpumask.h>]. Some examples follow. -In this example, there are 64 cpus in the system but cpus 32-63 exceed +In this example, there are 64 CPUs in the system but cpus 32-63 exceed the kernel max which is limited to 0..31 by the NR_CPUS config option -being 32. Note also that cpus 2 and 4-31 are not online but could be +being 32. Note also that CPUs 2 and 4-31 are not online but could be brought online as they are both present and possible. kernel_max: 31 @@ -67,8 +80,8 @@ brought online as they are both present and possible. present: 0-31 In this example, the NR_CPUS config option is 128, but the kernel was -started with possible_cpus=144. There are 4 cpus in the system and cpu2 -was manually taken offline (and is the only cpu that can be brought +started with possible_cpus=144. There are 4 CPUs in the system and cpu2 +was manually taken offline (and is the only CPU that can be brought online.) kernel_max: 127 @@ -78,4 +91,4 @@ online.) present: 0-3 See cpu-hotplug.txt for the possible_cpus=NUM kernel start parameter -as well as more information on the various cpumask's. +as well as more information on the various cpumasks. diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt index 59a91e5c690..611f5a5499b 100644 --- a/Documentation/debugging-via-ohci1394.txt +++ b/Documentation/debugging-via-ohci1394.txt @@ -64,14 +64,14 @@ be used to view the printk buffer of a remote machine, even with live update. Bernhard Kaindl enhanced firescope to support accessing 64-bit machines from 32-bit firescope and vice versa: -- ftp://ftp.suse.de/private/bk/firewire/tools/firescope-0.2.2.tar.bz2 +- http://halobates.de/firewire/firescope-0.2.2.tar.bz2 and he implemented fast system dump (alpha version - read README.txt): -- ftp://ftp.suse.de/private/bk/firewire/tools/firedump-0.1.tar.bz2 +- http://halobates.de/firewire/firedump-0.1.tar.bz2 There is also a gdb proxy for firewire which allows to use gdb to access data which can be referenced from symbols found by gdb in vmlinux: -- ftp://ftp.suse.de/private/bk/firewire/tools/fireproxy-0.33.tar.bz2 +- http://halobates.de/firewire/fireproxy-0.33.tar.bz2 The latest version of this gdb proxy (fireproxy-0.34) can communicate (not yet stable) with kgdb over an memory-based communication module (kgdbom). @@ -178,7 +178,7 @@ Step-by-step instructions for using firescope with early OHCI initialization: Notes ----- -Documentation and specifications: ftp://ftp.suse.de/private/bk/firewire/docs +Documentation and specifications: http://halobates.de/firewire/ FireWire is a trademark of Apple Inc. - for more information please refer to: http://en.wikipedia.org/wiki/FireWire diff --git a/Documentation/dontdiff b/Documentation/dontdiff index e1efc400bed..e151b2a3626 100644 --- a/Documentation/dontdiff +++ b/Documentation/dontdiff @@ -65,6 +65,7 @@ aicdb.h* asm-offsets.h asm_offsets.h autoconf.h* +av_permissions.h bbootsect bin2c binkernel.spec @@ -95,12 +96,14 @@ docproc elf2ecoff elfconfig.h* fixdep +flask.h fore200e_mkfirm fore200e_pca_fw.c* gconf gen-devlist gen_crc32table gen_init_cpio +genheaders genksyms *_gray256.c ihex2fw diff --git a/Documentation/dvb/README.dvb-usb b/Documentation/dvb/README.dvb-usb index bf2a9cdfe7b..c8238e44ed6 100644 --- a/Documentation/dvb/README.dvb-usb +++ b/Documentation/dvb/README.dvb-usb @@ -85,7 +85,7 @@ http://www.linuxtv.org/wiki/index.php/DVB_USB - moved transfer control (pid filter, fifo control) from usb driver to frontend, it seems better settled there (added xfer_ops-struct) - created a common files for frontends (mc/p/mb) - 2004-09-28 - added support for a new device (Unkown, vendor ID is Hyper-Paltek) + 2004-09-28 - added support for a new device (Unknown, vendor ID is Hyper-Paltek) 2004-09-20 - added support for a new device (Compro DVB-U2000), thanks to Amaury Demol for reporting - changed usb TS transfer method (several urbs, stopping transfer diff --git a/Documentation/edac.txt b/Documentation/edac.txt index 06f8f46692d..79c53322376 100644 --- a/Documentation/edac.txt +++ b/Documentation/edac.txt @@ -80,7 +80,7 @@ is: broken_parity_status -as is located in /sys/devices/pci<XXX>/0000:XX:YY.Z directorys for +as is located in /sys/devices/pci<XXX>/0000:XX:YY.Z directories for PCI devices. FUTURE HARDWARE SCANNING @@ -288,9 +288,8 @@ Total UE count that had no information attribute fileY: 'ue_noinfo_count' - This attribute file displays the number of UEs that - have occurred have occurred with no informations as to which DIMM - slot is having errors. + This attribute file displays the number of UEs that have occurred + with no information as to which DIMM slot is having errors. Total Correctable Errors count attribute file: diff --git a/Documentation/fb/framebuffer.txt b/Documentation/fb/framebuffer.txt index b3e3a035683..fe79e3c8847 100644 --- a/Documentation/fb/framebuffer.txt +++ b/Documentation/fb/framebuffer.txt @@ -312,10 +312,8 @@ and to the following documentation: 8. Mailing list --------------- -There are several frame buffer device related mailing lists at SourceForge: - - linux-fbdev-announce@lists.sourceforge.net, for announcements, - - linux-fbdev-user@lists.sourceforge.net, for generic user support, - - linux-fbdev-devel@lists.sourceforge.net, for project developers. +There is a frame buffer device related mailing list at kernel.org: +linux-fbdev@vger.kernel.org. Point your web browser to http://sourceforge.net/projects/linux-fbdev/ for subscription information and archive browsing. diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 89a47b5aff0..2a4d77946c7 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -6,6 +6,21 @@ be removed from this file. --------------------------- +What: USER_SCHED +When: 2.6.34 + +Why: USER_SCHED was implemented as a proof of concept for group scheduling. + The effect of USER_SCHED can already be achieved from userspace with + the help of libcgroup. The removal of USER_SCHED will also simplify + the scheduler code with the removal of one major ifdef. There are also + issues USER_SCHED has with USER_NS. A decision was taken not to fix + those and instead remove USER_SCHED. Also new group scheduling + features will not be implemented for USER_SCHED. + +Who: Dhaval Giani <dhaval@linux.vnet.ibm.com> + +--------------------------- + What: PRISM54 When: 2.6.34 @@ -302,18 +317,6 @@ Who: ocfs2-devel@oss.oracle.com --------------------------- -What: SCTP_GET_PEER_ADDRS_NUM_OLD, SCTP_GET_PEER_ADDRS_OLD, - SCTP_GET_LOCAL_ADDRS_NUM_OLD, SCTP_GET_LOCAL_ADDRS_OLD -When: June 2009 -Why: A newer version of the options have been introduced in 2005 that - removes the limitions of the old API. The sctp library has been - converted to use these new options at the same time. Any user - space app that directly uses the old options should convert to using - the new options. -Who: Vlad Yasevich <vladislav.yasevich@hp.com> - ---------------------------- - What: Ability for non root users to shm_get hugetlb pages based on mlock resource limits When: 2.6.31 @@ -404,20 +407,19 @@ Who: Alex Chiang <achiang@hp.com> --------------------------- -What: i2c-voodoo3 driver -When: October 2009 -Why: Superseded by tdfxfb. I2C/DDC support used to live in a separate - driver but this caused driver conflicts. -Who: Jean Delvare <khali@linux-fr.org> - Krzysztof Helt <krzysztof.h1@wp.pl> - ---------------------------- - What: CONFIG_RFKILL_INPUT When: 2.6.33 Why: Should be implemented in userspace, policy daemon. Who: Johannes Berg <johannes@sipsolutions.net> +--------------------------- + +What: CONFIG_INOTIFY +When: 2.6.33 +Why: last user (audit) will be converted to the newer more generic + and more easily maintained fsnotify subsystem +Who: Eric Paris <eparis@redhat.com> + ---------------------------- What: lock_policy_rwsem_* and unlock_policy_rwsem_* will not be @@ -451,3 +453,40 @@ Why: OSS sound_core grabs all legacy minors (0-255) of SOUND_MAJOR will also allow making ALSA OSS emulation independent of sound_core. The dependency will be broken then too. Who: Tejun Heo <tj@kernel.org> + +---------------------------- + +What: Support for VMware's guest paravirtuliazation technique [VMI] will be + dropped. +When: 2.6.37 or earlier. +Why: With the recent innovations in CPU hardware acceleration technologies + from Intel and AMD, VMware ran a few experiments to compare these + techniques to guest paravirtualization technique on VMware's platform. + These hardware assisted virtualization techniques have outperformed the + performance benefits provided by VMI in most of the workloads. VMware + expects that these hardware features will be ubiquitous in a couple of + years, as a result, VMware has started a phased retirement of this + feature from the hypervisor. We will be removing this feature from the + Kernel too. Right now we are targeting 2.6.37 but can retire earlier if + technical reasons (read opportunity to remove major chunk of pvops) + arise. + + Please note that VMI has always been an optimization and non-VMI kernels + still work fine on VMware's platform. + Latest versions of VMware's product which support VMI are, + Workstation 7.0 and VSphere 4.0 on ESX side, future maintainence + releases for these products will continue supporting VMI. + + For more details about VMI retirement take a look at this, + http://blogs.vmware.com/guestosguide/2009/09/vmi-retirement.html + +Who: Alok N Kataria <akataria@vmware.com> + +---------------------------- + +What: adt7473 hardware monitoring driver +When: February 2010 +Why: Obsoleted by the adt7475 driver. +Who: Jean Delvare <khali@linux-fr.org> + +--------------------------- diff --git a/Documentation/filesystems/00-INDEX b/Documentation/filesystems/00-INDEX index f15621ee559..7001782ab93 100644 --- a/Documentation/filesystems/00-INDEX +++ b/Documentation/filesystems/00-INDEX @@ -36,6 +36,8 @@ dnotify.txt - info about directory notification in Linux. ecryptfs.txt - docs on eCryptfs: stacked cryptographic filesystem for Linux. +exofs.txt + - info, usage, mount options, design about EXOFS. ext2.txt - info, mount options and specifications for the Ext2 filesystem. ext3.txt diff --git a/Documentation/filesystems/caching/fscache.txt b/Documentation/filesystems/caching/fscache.txt index 9e94b9491d8..a91e2e2095b 100644 --- a/Documentation/filesystems/caching/fscache.txt +++ b/Documentation/filesystems/caching/fscache.txt @@ -235,6 +235,7 @@ proc files. neg=N Number of negative lookups made pos=N Number of positive lookups made crt=N Number of objects created by lookup + tmo=N Number of lookups timed out and requeued Updates n=N Number of update cookie requests seen nul=N Number of upd reqs given a NULL parent run=N Number of upd reqs granted CPU time @@ -250,8 +251,10 @@ proc files. ok=N Number of successful alloc reqs wt=N Number of alloc reqs that waited on lookup completion nbf=N Number of alloc reqs rejected -ENOBUFS + int=N Number of alloc reqs aborted -ERESTARTSYS ops=N Number of alloc reqs submitted owt=N Number of alloc reqs waited for CPU time + abt=N Number of alloc reqs aborted due to object death Retrvls n=N Number of retrieval (read) requests seen ok=N Number of successful retr reqs wt=N Number of retr reqs that waited on lookup completion @@ -261,6 +264,7 @@ proc files. oom=N Number of retr reqs failed -ENOMEM ops=N Number of retr reqs submitted owt=N Number of retr reqs waited for CPU time + abt=N Number of retr reqs aborted due to object death Stores n=N Number of storage (write) requests seen ok=N Number of successful store reqs agn=N Number of store reqs on a page already pending storage @@ -268,12 +272,37 @@ proc files. oom=N Number of store reqs failed -ENOMEM ops=N Number of store reqs submitted run=N Number of store reqs granted CPU time + pgs=N Number of pages given store req processing time + rxd=N Number of store reqs deleted from tracking tree + olm=N Number of store reqs over store limit + VmScan nos=N Number of release reqs against pages with no pending store + gon=N Number of release reqs against pages stored by time lock granted + bsy=N Number of release reqs ignored due to in-progress store + can=N Number of page stores cancelled due to release req Ops pend=N Number of times async ops added to pending queues run=N Number of times async ops given CPU time enq=N Number of times async ops queued for processing + can=N Number of async ops cancelled + rej=N Number of async ops rejected due to object lookup/create failure dfr=N Number of async ops queued for deferred release rel=N Number of async ops released gc=N Number of deferred-release async ops garbage collected + CacheOp alo=N Number of in-progress alloc_object() cache ops + luo=N Number of in-progress lookup_object() cache ops + luc=N Number of in-progress lookup_complete() cache ops + gro=N Number of in-progress grab_object() cache ops + upo=N Number of in-progress update_object() cache ops + dro=N Number of in-progress drop_object() cache ops + pto=N Number of in-progress put_object() cache ops + syn=N Number of in-progress sync_cache() cache ops + atc=N Number of in-progress attr_changed() cache ops + rap=N Number of in-progress read_or_alloc_page() cache ops + ras=N Number of in-progress read_or_alloc_pages() cache ops + alp=N Number of in-progress allocate_page() cache ops + als=N Number of in-progress allocate_pages() cache ops + wrp=N Number of in-progress write_page() cache ops + ucp=N Number of in-progress uncache_page() cache ops + dsp=N Number of in-progress dissociate_pages() cache ops (*) /proc/fs/fscache/histogram @@ -299,6 +328,87 @@ proc files. jiffy range covered, and the SECS field the equivalent number of seconds. +=========== +OBJECT LIST +=========== + +If CONFIG_FSCACHE_OBJECT_LIST is enabled, the FS-Cache facility will maintain a +list of all the objects currently allocated and allow them to be viewed +through: + + /proc/fs/fscache/objects + +This will look something like: + + [root@andromeda ~]# head /proc/fs/fscache/objects + OBJECT PARENT STAT CHLDN OPS OOP IPR EX READS EM EV F S | NETFS_COOKIE_DEF TY FL NETFS_DATA OBJECT_KEY, AUX_DATA + ======== ======== ==== ===== === === === == ===== == == = = | ================ == == ================ ================ + 17e4b 2 ACTV 0 0 0 0 0 0 7b 4 0 8 | NFS.fh DT 0 ffff88001dd82820 010006017edcf8bbc93b43298fdfbe71e50b57b13a172c0117f38472, e567634700000000000000000000000063f2404a000000000000000000000000c9030000000000000000000063f2404a + 1693a 2 ACTV 0 0 0 0 0 0 7b 4 0 8 | NFS.fh DT 0 ffff88002db23380 010006017edcf8bbc93b43298fdfbe71e50b57b1e0162c01a2df0ea6, 420ebc4a000000000000000000000000420ebc4a0000000000000000000000000e1801000000000000000000420ebc4a + +where the first set of columns before the '|' describe the object: + + COLUMN DESCRIPTION + ======= =============================================================== + OBJECT Object debugging ID (appears as OBJ%x in some debug messages) + PARENT Debugging ID of parent object + STAT Object state + CHLDN Number of child objects of this object + OPS Number of outstanding operations on this object + OOP Number of outstanding child object management operations + IPR + EX Number of outstanding exclusive operations + READS Number of outstanding read operations + EM Object's event mask + EV Events raised on this object + F Object flags + S Object slow-work work item flags + +and the second set of columns describe the object's cookie, if present: + + COLUMN DESCRIPTION + =============== ======================================================= + NETFS_COOKIE_DEF Name of netfs cookie definition + TY Cookie type (IX - index, DT - data, hex - special) + FL Cookie flags + NETFS_DATA Netfs private data stored in the cookie + OBJECT_KEY Object key } 1 column, with separating comma + AUX_DATA Object aux data } presence may be configured + +The data shown may be filtered by attaching the a key to an appropriate keyring +before viewing the file. Something like: + + keyctl add user fscache:objlist <restrictions> @s + +where <restrictions> are a selection of the following letters: + + K Show hexdump of object key (don't show if not given) + A Show hexdump of object aux data (don't show if not given) + +and the following paired letters: + + C Show objects that have a cookie + c Show objects that don't have a cookie + B Show objects that are busy + b Show objects that aren't busy + W Show objects that have pending writes + w Show objects that don't have pending writes + R Show objects that have outstanding reads + r Show objects that don't have outstanding reads + S Show objects that have slow work queued + s Show objects that don't have slow work queued + +If neither side of a letter pair is given, then both are implied. For example: + + keyctl add user fscache:objlist KB @s + +shows objects that are busy, and lists their object keys, but does not dump +their auxiliary data. It also implies "CcWwRrSs", but as 'B' is given, 'b' is +not implied. + +By default all objects and all fields will be shown. + + ========= DEBUGGING ========= diff --git a/Documentation/filesystems/caching/netfs-api.txt b/Documentation/filesystems/caching/netfs-api.txt index 2666b1ed5e9..1902c57b72e 100644 --- a/Documentation/filesystems/caching/netfs-api.txt +++ b/Documentation/filesystems/caching/netfs-api.txt @@ -641,7 +641,7 @@ data file must be retired (see the relinquish cookie function below). Furthermore, note that this does not cancel the asynchronous read or write operation started by the read/alloc and write functions, so the page -invalidation and release functions must use: +invalidation functions must use: bool fscache_check_page_write(struct fscache_cookie *cookie, struct page *page); @@ -654,6 +654,25 @@ to see if a page is being written to the cache, and: to wait for it to finish if it is. +When releasepage() is being implemented, a special FS-Cache function exists to +manage the heuristics of coping with vmscan trying to eject pages, which may +conflict with the cache trying to write pages to the cache (which may itself +need to allocate memory): + + bool fscache_maybe_release_page(struct fscache_cookie *cookie, + struct page *page, + gfp_t gfp); + +This takes the netfs cookie, and the page and gfp arguments as supplied to +releasepage(). It will return false if the page cannot be released yet for +some reason and if it returns true, the page has been uncached and can now be +released. + +To make a page available for release, this function may wait for an outstanding +storage request to complete, or it may attempt to cancel the storage request - +in which case the page will not be stored in the cache this time. + + ========================== INDEX AND DATA FILE UPDATE ========================== diff --git a/Documentation/filesystems/exofs.txt b/Documentation/filesystems/exofs.txt index 0ced74c2f73..abd2a9b5b78 100644 --- a/Documentation/filesystems/exofs.txt +++ b/Documentation/filesystems/exofs.txt @@ -60,13 +60,13 @@ USAGE mkfs.exofs --pid=65536 --format /dev/osd0 - The --format is optional if not specified no OSD_FORMAT will be - preformed and a clean file system will be created in the specified pid, + The --format is optional. If not specified, no OSD_FORMAT will be + performed and a clean file system will be created in the specified pid, in the available space of the target. (Use --format=size_in_meg to limit the total LUN space available) - If pid already exist it will be deleted and a new one will be created in it's - place. Be careful. + If pid already exists, it will be deleted and a new one will be created in + its place. Be careful. An exofs lives inside a single OSD partition. You can create multiple exofs filesystems on the same device using multiple pids. @@ -81,7 +81,7 @@ USAGE 7. For reference (See do-exofs example script): do-exofs start - an example of how to perform the above steps. - do-exofs stop - an example of how to unmount the file system. + do-exofs stop - an example of how to unmount the file system. do-exofs format - an example of how to format and mkfs a new exofs. 8. Extra compilation flags (uncomment in fs/exofs/Kbuild): @@ -104,8 +104,8 @@ Where: exofs specific options: Options are separated by commas (,) pid=<integer> - The partition number to mount/create as container of the filesystem. - This option is mandatory - to=<integer> - Timeout in ticks for a single command + This option is mandatory. + to=<integer> - Timeout in ticks for a single command. default is (60 * HZ) [for debugging only] =============================================================================== @@ -116,7 +116,7 @@ DESIGN with a special ID (defined in common.h). Information included in the file system control block is used to fill the in-memory superblock structure at mount time. This object is created before - the file system is used by mkexofs.c It contains information such as: + the file system is used by mkexofs.c. It contains information such as: - The file system's magic number - The next inode number to be allocated @@ -134,8 +134,8 @@ DESIGN attributes. This applies to both regular files and other types (directories, device files, symlinks, etc.). -* Credentials are generated per object (inode and superblock) when they is - created in memory (read off disk or created). The credential works for all +* Credentials are generated per object (inode and superblock) when they are + created in memory (read from disk or created). The credential works for all operations and is used as long as the object remains in memory. * Async OSD operations are used whenever possible, but the target may execute @@ -145,7 +145,8 @@ DESIGN from executing in reverse order: - The following are handled with the OBJ_CREATED and OBJ_2BCREATED flags. OBJ_CREATED is set when we know the object exists on the OSD - - in create's callback function, and when we successfully do a read_inode. + in create's callback function, and when we successfully do a + read_inode. OBJ_2BCREATED is set in the beginning of the create function, so we know that we should wait. - create/delete: delete should wait until the object is created diff --git a/Documentation/filesystems/ext3.txt b/Documentation/filesystems/ext3.txt index 570f9bd9be2..867c5b50cb4 100644 --- a/Documentation/filesystems/ext3.txt +++ b/Documentation/filesystems/ext3.txt @@ -32,8 +32,8 @@ journal_dev=devnum When the external journal device's major/minor numbers identified through its new major/minor numbers encoded in devnum. -noload Don't load the journal on mounting. Note that this forces - mount of inconsistent filesystem, which can lead to +norecovery Don't load the journal on mounting. Note that this forces +noload mount of inconsistent filesystem, which can lead to various problems. data=journal All data are committed into the journal prior to being @@ -123,10 +123,18 @@ resuid=n The user ID which may use the reserved blocks. sb=n Use alternate superblock at this location. -quota -noquota -grpquota -usrquota +quota These options are ignored by the filesystem. They +noquota are used only by quota tools to recognize volumes +grpquota where quota should be turned on. See documentation +usrquota in the quota-tools package for more details + (http://sourceforge.net/projects/linuxquota). + +jqfmt=<quota type> These options tell filesystem details about quota +usrjquota=<file> so that quota information can be properly updated +grpjquota=<file> during journal replay. They replace the above + quota options. See documentation in the quota-tools + package for more details + (http://sourceforge.net/projects/linuxquota). bh (*) ext3 associates buffer heads to data pages to nobh (a) cache disk block mapping information diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt index bf4f4b7e11b..af6885c3c82 100644 --- a/Documentation/filesystems/ext4.txt +++ b/Documentation/filesystems/ext4.txt @@ -134,9 +134,15 @@ ro Mount filesystem read only. Note that ext4 will mount options "ro,noload" can be used to prevent writes to the filesystem. +journal_checksum Enable checksumming of the journal transactions. + This will allow the recovery code in e2fsck and the + kernel to detect corruption in the kernel. It is a + compatible change and will be ignored by older kernels. + journal_async_commit Commit block can be written to disk without waiting for descriptor blocks. If enabled older kernels cannot - mount the device. + mount the device. This will enable 'journal_checksum' + internally. journal=update Update the ext4 file system's journal to the current format. @@ -147,8 +153,8 @@ journal_dev=devnum When the external journal device's major/minor numbers identified through its new major/minor numbers encoded in devnum. -noload Don't load the journal on mounting. Note that - if the filesystem was not unmounted cleanly, +norecovery Don't load the journal on mounting. Note that +noload if the filesystem was not unmounted cleanly, skipping the journal replay will lead to the filesystem containing inconsistencies that can lead to any number of problems. @@ -347,6 +353,12 @@ noauto_da_alloc replacing existing files via patterns such as system crashes before the delayed allocation blocks are forced to disk. +discard Controls whether ext4 should issue discard/TRIM +nodiscard(*) commands to the underlying block device when + blocks are freed. This is useful for SSD devices + and sparse/thinly-provisioned LUNs, but it is off + by default until sufficient testing has been done. + Data Mode ========= There are 3 different data modes: diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt index 01539f41067..4949fcaa6b6 100644 --- a/Documentation/filesystems/nilfs2.txt +++ b/Documentation/filesystems/nilfs2.txt @@ -49,8 +49,7 @@ Mount options NILFS2 supports the following mount options: (*) == default -barrier=on(*) This enables/disables barriers. barrier=off disables - it, barrier=on enables it. +nobarrier Disables barriers. errors=continue(*) Keep going on a filesystem error. errors=remount-ro Remount the filesystem read-only on an error. errors=panic Panic and halt the machine if an error occurs. @@ -71,6 +70,10 @@ order=strict Apply strict in-order semantics that preserves sequence blocks. That means, it is guaranteed that no overtaking of events occurs in the recovered file system after a crash. +norecovery Disable recovery of the filesystem on mount. + This disables every write access on the device for + read-only mounts or snapshots. This option will fail + for r/w mounts on an unclean volume. NILFS2 usage ============ diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt index c2a0871280a..c58b9f5ba00 100644 --- a/Documentation/filesystems/ocfs2.txt +++ b/Documentation/filesystems/ocfs2.txt @@ -20,15 +20,16 @@ Lots of code taken from ext3 and other projects. Authors in alphabetical order: Joel Becker <joel.becker@oracle.com> Zach Brown <zach.brown@oracle.com> -Mark Fasheh <mark.fasheh@oracle.com> +Mark Fasheh <mfasheh@suse.com> Kurt Hackel <kurt.hackel@oracle.com> +Tao Ma <tao.ma@oracle.com> Sunil Mushran <sunil.mushran@oracle.com> Manish Singh <manish.singh@oracle.com> +Tiger Yang <tiger.yang@oracle.com> Caveats ======= Features which OCFS2 does not support yet: - - quotas - Directory change notification (F_NOTIFY) - Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease) @@ -70,7 +71,6 @@ commit=nrsec (*) Ocfs2 can be told to sync all its data and metadata performance. localalloc=8(*) Allows custom localalloc size in MB. If the value is too large, the fs will silently revert it to the default. - Localalloc is not enabled for local mounts. localflocks This disables cluster aware flock. inode64 Indicates that Ocfs2 is allowed to create inodes at any location in the filesystem, including those which diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index 2c48f945546..94b9f2056f4 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -1072,7 +1072,8 @@ second). The meanings of the columns are as follows, from left to right: - irq: servicing interrupts - softirq: servicing softirqs - steal: involuntary wait -- guest: running a guest +- guest: running a normal guest +- guest_nice: running a niced guest The "intr" line gives counts of interrupts serviced since boot time, for each of the possible system interrupts. The first column is the total of all @@ -1088,8 +1089,8 @@ The "processes" line gives the number of processes and threads created, which includes (but is not limited to) those created by calls to the fork() and clone() system calls. -The "procs_running" line gives the number of processes currently running on -CPUs. +The "procs_running" line gives the total number of threads that are +running or ready to run (i.e., the total number of runnable threads). The "procs_blocked" line gives the number of processes currently blocked, waiting for I/O to complete. diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 623f094c9d8..3de2f32edd9 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -472,7 +472,7 @@ __sync_single_inode) to check if ->writepages has been successful in writing out the whole address_space. The Writeback tag is used by filemap*wait* and sync_page* functions, -via wait_on_page_writeback_range, to wait for all writeback to +via filemap_fdatawait_range, to wait for all writeback to complete. While waiting ->sync_page (if defined) will be called on each page that is found to require writeback. diff --git a/Documentation/flexible-arrays.txt b/Documentation/flexible-arrays.txt index 84eb26808de..cb8a3a00cc9 100644 --- a/Documentation/flexible-arrays.txt +++ b/Documentation/flexible-arrays.txt @@ -1,5 +1,5 @@ Using flexible arrays in the kernel -Last updated for 2.6.31 +Last updated for 2.6.32 Jonathan Corbet <corbet@lwn.net> Large contiguous memory allocations can be unreliable in the Linux kernel. @@ -40,6 +40,13 @@ argument is passed directly to the internal memory allocation calls. With the current code, using flags to ask for high memory is likely to lead to notably unpleasant side effects. +It is also possible to define flexible arrays at compile time with: + + DEFINE_FLEX_ARRAY(name, element_size, total); + +This macro will result in a definition of an array with the given name; the +element size and total will be checked for validity at compile time. + Storing data into a flexible array is accomplished with a call to: int flex_array_put(struct flex_array *array, unsigned int element_nr, @@ -76,16 +83,30 @@ particular element has never been allocated. Note that it is possible to get back a valid pointer for an element which has never been stored in the array. Memory for array elements is allocated one page at a time; a single allocation could provide memory for several -adjacent elements. The flexible array code does not know if a specific -element has been written; it only knows if the associated memory is -present. So a flex_array_get() call on an element which was never stored -in the array has the potential to return a pointer to random data. If the -caller does not have a separate way to know which elements were actually -stored, it might be wise, at least, to add GFP_ZERO to the flags argument -to ensure that all elements are zeroed. - -There is no way to remove a single element from the array. It is possible, -though, to remove all elements with a call to: +adjacent elements. Flexible array elements are normally initialized to the +value FLEX_ARRAY_FREE (defined as 0x6c in <linux/poison.h>), so errors +involving that number probably result from use of unstored array entries. +Note that, if array elements are allocated with __GFP_ZERO, they will be +initialized to zero and this poisoning will not happen. + +Individual elements in the array can be cleared with: + + int flex_array_clear(struct flex_array *array, unsigned int element_nr); + +This function will set the given element to FLEX_ARRAY_FREE and return +zero. If storage for the indicated element is not allocated for the array, +flex_array_clear() will return -EINVAL instead. Note that clearing an +element does not release the storage associated with it; to reduce the +allocated size of an array, call: + + int flex_array_shrink(struct flex_array *array); + +The return value will be the number of pages of memory actually freed. +This function works by scanning the array for pages containing nothing but +FLEX_ARRAY_FREE bytes, so (1) it can be expensive, and (2) it will not work +if the array's pages are allocated with __GFP_ZERO. + +It is possible to remove all elements of an array with a call to: void flex_array_free_parts(struct flex_array *array); diff --git a/Documentation/gpio.txt b/Documentation/gpio.txt index fa4dc077ae0..e4e7daed2ba 100644 --- a/Documentation/gpio.txt +++ b/Documentation/gpio.txt @@ -380,7 +380,7 @@ rare; use gpiochip_remove() when it is unavoidable. Most often a gpio_chip is part of an instance-specific structure with state not exposed by the GPIO interfaces, such as addressing, power management, -and more. Chips such as codecs will have complex non-GPIO state, +and more. Chips such as codecs will have complex non-GPIO state. Any debugfs dump method should normally ignore signals which haven't been requested as GPIOs. They can use gpiochip_is_requested(), which returns @@ -531,7 +531,7 @@ and have the following read/write attributes: This file exists only if the pin can be configured as an interrupt generating input pin. -GPIO controllers have paths like /sys/class/gpio/chipchip42/ (for the +GPIO controllers have paths like /sys/class/gpio/gpiochip42/ (for the controller implementing GPIOs starting at #42) and have the following read-only attributes: diff --git a/Documentation/hwmon/adt7473 b/Documentation/hwmon/adt7473 index 1cbf671822e..446612bd1fb 100644 --- a/Documentation/hwmon/adt7473 +++ b/Documentation/hwmon/adt7473 @@ -9,6 +9,8 @@ Supported chips: Author: Darrick J. Wong +This driver is depreacted, please use the adt7475 driver instead. + Description ----------- diff --git a/Documentation/hwmon/adt7475 b/Documentation/hwmon/adt7475 index a2b1abec850..0502f2b464e 100644 --- a/Documentation/hwmon/adt7475 +++ b/Documentation/hwmon/adt7475 @@ -1,87 +1,117 @@ -This describes the interface for the ADT7475 driver: - -(there are 4 fans, numbered fan1 to fan4): - -fanX_input Read the current speed of the fan (in RPMs) -fanX_min Read/write the minimum speed of the fan. Dropping - below this sets an alarm. - -(there are three PWMs, numbered pwm1 to pwm3): - -pwmX Read/write the current duty cycle of the PWM. Writes - only have effect when auto mode is turned off (see - below). Range is 0 - 255. - -pwmX_enable Fan speed control method: - - 0 - No control (fan at full speed) - 1 - Manual fan speed control (using pwm[1-*]) - 2 - Automatic fan speed control - -pwmX_auto_channels_temp Select which channels affect this PWM - - 1 - TEMP1 controls PWM - 2 - TEMP2 controls PWM - 4 - TEMP3 controls PWM - 6 - TEMP2 and TEMP3 control PWM - 7 - All three inputs control PWM - -pwmX_freq Read/write the PWM frequency in Hz. The number - should be one of the following: - - 11 Hz - 14 Hz - 22 Hz - 29 Hz - 35 Hz - 44 Hz - 58 Hz - 88 Hz - -pwmX_auto_point1_pwm Read/write the minimum PWM duty cycle in automatic mode - -pwmX_auto_point2_pwm Read/write the maximum PWM duty cycle in automatic mode - -(there are three temperature settings numbered temp1 to temp3): - -tempX_input Read the current temperature. The value is in milli - degrees of Celsius. - -tempX_max Read/write the upper temperature limit - exceeding this - will cause an alarm. - -tempX_min Read/write the lower temperature limit - exceeding this - will cause an alarm. - -tempX_offset Read/write the temperature adjustment offset - -tempX_crit Read/write the THERM limit for remote1. - -tempX_crit_hyst Set the temperature value below crit where the - fans will stay on - this helps drive the temperature - low enough so it doesn't stay near the edge and - cause THERM to keep tripping. - -tempX_auto_point1_temp Read/write the minimum temperature where the fans will - turn on in automatic mode. - -tempX_auto_point2_temp Read/write the maximum temperature over which the fans - will run in automatic mode. tempX_auto_point1_temp - and tempX_auto_point2_temp together define the - range of automatic control. - -tempX_alarm Read a 1 if the max/min alarm is set -tempX_fault Read a 1 if either temp1 or temp3 diode has a fault - -(There are two voltage settings, in1 and in2): - -inX_input Read the current voltage on VCC. Value is in - millivolts. - -inX_min read/write the minimum voltage limit. - Dropping below this causes an alarm. - -inX_max read/write the maximum voltage limit. - Exceeding this causes an alarm. - -inX_alarm Read a 1 if the max/min alarm is set. +Kernel driver adt7475 +===================== + +Supported chips: + * Analog Devices ADT7473 + Prefix: 'adt7473' + Addresses scanned: I2C 0x2C, 0x2D, 0x2E + Datasheet: Publicly available at the On Semiconductors website + * Analog Devices ADT7475 + Prefix: 'adt7475' + Addresses scanned: I2C 0x2E + Datasheet: Publicly available at the On Semiconductors website + * Analog Devices ADT7476 + Prefix: 'adt7476' + Addresses scanned: I2C 0x2C, 0x2D, 0x2E + Datasheet: Publicly available at the On Semiconductors website + * Analog Devices ADT7490 + Prefix: 'adt7490' + Addresses scanned: I2C 0x2C, 0x2D, 0x2E + Datasheet: Publicly available at the On Semiconductors website + +Authors: + Jordan Crouse + Hans de Goede + Darrick J. Wong (documentation) + Jean Delvare + + +Description +----------- + +This driver implements support for the Analog Devices ADT7473, ADT7475, +ADT7476 and ADT7490 chip family. The ADT7473 and ADT7475 differ only in +minor details. The ADT7476 has additional features, including extra voltage +measurement inputs and VID support. The ADT7490 also has additional +features, including extra voltage measurement inputs and PECI support. All +the supported chips will be collectively designed by the name "ADT747x" in +the rest of this document. + +The ADT747x uses the 2-wire interface compatible with the SMBus 2.0 +specification. Using an analog to digital converter it measures three (3) +temperatures and two (2) or more voltages. It has four (4) 16-bit counters +for measuring fan speed. There are three (3) PWM outputs that can be used +to control fan speed. + +A sophisticated control system for the PWM outputs is designed into the +ADT747x that allows fan speed to be adjusted automatically based on any of the +three temperature sensors. Each PWM output is individually adjustable and +programmable. Once configured, the ADT747x will adjust the PWM outputs in +response to the measured temperatures without further host intervention. +This feature can also be disabled for manual control of the PWM's. + +Each of the measured inputs (voltage, temperature, fan speed) has +corresponding high/low limit values. The ADT747x will signal an ALARM if +any measured value exceeds either limit. + +The ADT747x samples all inputs continuously. The driver will not read +the registers more often than once every other second. Further, +configuration data is only read once per minute. + +Chip Differences Summary +------------------------ + +ADT7473: + * 2 voltage inputs + * system acoustics optimizations (not implemented) + +ADT7475: + * 2 voltage inputs + +ADT7476: + * 5 voltage inputs + * VID support + +ADT7490: + * 6 voltage inputs + * 1 Imon input (not implemented) + * PECI support (not implemented) + * 2 GPIO pins (not implemented) + * system acoustics optimizations (not implemented) + +Special Features +---------------- + +The ADT747x has a 10-bit ADC and can therefore measure temperatures +with a resolution of 0.25 degree Celsius. Temperature readings can be +configured either for two's complement format or "Offset 64" format, +wherein 64 is subtracted from the raw value to get the temperature value. + +The datasheet is very detailed and describes a procedure for determining +an optimal configuration for the automatic PWM control. + +Fan Speed Control +----------------- + +The driver exposes two trip points per PWM channel. + +point1: Set the PWM speed at the lower temperature bound +point2: Set the PWM speed at the higher temperature bound + +The ADT747x will scale the PWM linearly between the lower and higher PWM +speed when the temperature is between the two temperature boundaries. +Temperature boundaries are associated to temperature channels rather than +PWM outputs, and a given PWM output can be controlled by several temperature +channels. As a result, the ADT747x may compute more than one PWM value +for a channel at a given time, in which case the maximum value (fastest +fan speed) is applied. PWM values range from 0 (off) to 255 (full speed). + +Fan speed may be set to maximum when the temperature sensor associated with +the PWM control exceeds temp#_max. + +Notes +----- + +The nVidia binary driver presents an ADT7473 chip via an on-card i2c bus. +Unfortunately, they fail to set the i2c adapter class, so this driver may +fail to find the chip until the nvidia driver is patched. diff --git a/Documentation/hwmon/f71882fg b/Documentation/hwmon/f71882fg index bee4c30bc1e..a7952c2bd95 100644 --- a/Documentation/hwmon/f71882fg +++ b/Documentation/hwmon/f71882fg @@ -14,6 +14,10 @@ Supported chips: Prefix: 'f71882fg' Addresses scanned: none, address read from Super I/O config space Datasheet: Available from the Fintek website + * Fintek F71889FG + Prefix: 'f71889fg' + Addresses scanned: none, address read from Super I/O config space + Datasheet: Should become available on the Fintek website soon * Fintek F8000 Prefix: 'f8000' Addresses scanned: none, address read from Super I/O config space @@ -51,6 +55,12 @@ supported. The right one to use depends on external circuitry on the motherboard, so the driver assumes that the BIOS set the method properly. +Note that the lowest numbered temperature zone trip point corresponds to +to the border between the highest and one but highest temperature zones, and +vica versa. So the temperature zone trip points 1-4 (or 1-2) go from high temp +to low temp! This is how things are implemented in the IC, and the driver +mimicks this. + There are 2 modes to specify the speed of the fan, PWM duty cycle (or DC voltage) mode, where 0-100% duty cycle (0-100% of 12V) is specified. And RPM mode where the actual RPM of the fan (as measured) is controlled and the speed diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87 index 659315d98e0..f9ba96c0ac4 100644 --- a/Documentation/hwmon/it87 +++ b/Documentation/hwmon/it87 @@ -86,7 +86,6 @@ The IT8712F and IT8716F additionally feature VID inputs, used to report the Vcore voltage of the processor. The early IT8712F have 5 VID pins, the IT8716F and late IT8712F have 6. They are shared with other functions though, so the functionality may not be available on a given system. -The driver dumbly assume it is there. The IT8718F and IT8720F also features VID inputs (up to 8 pins) but the value is stored in the Super-I/O configuration space. Due to technical limitations, diff --git a/Documentation/hwmon/mc13783-adc b/Documentation/hwmon/mc13783-adc new file mode 100644 index 00000000000..044531a8640 --- /dev/null +++ b/Documentation/hwmon/mc13783-adc @@ -0,0 +1,50 @@ +Kernel driver mc13783-adc +========================= + +Supported chips: + * Freescale Atlas MC13783 + Prefix: 'mc13783_adc' + Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1 + +Authors: + Sascha Hauer <s.hauer@pengutronix.de> + Luotao Fu <l.fu@pengutronix.de> + +Description +----------- + +The Freescale MC13783 is a Power Management and Audio Circuit. Among +other things it contains a 10-bit A/D converter. The converter has 16 +channels which can be used in different modes. +The A/D converter has a resolution of 2.25mV. Channels 0-4 have +a dedicated meaning with chip internal scaling applied. Channels 5-7 +can be used as general purpose inputs or alternatively in a dedicated +mode. Channels 12-15 are occupied by the touchscreen if it's active. + +Currently the driver only supports channels 2 and 5-15 with no alternative +modes for channels 5-7. + +See this table for the meaning of the different channels and their chip +internal scaling: + +Channel Signal Input Range Scaling +------------------------------------------------------------------------------- +0 Battery Voltage (BATT) 2.50 - 4.65V -2.40V +1 Battery Current (BATT - BATTISNS) -50 - 50 mV x20 +2 Application Supply (BP) 2.50 - 4.65V -2.40V +3 Charger Voltage (CHRGRAW) 0 - 10V / /5 + 0 - 20V /10 +4 Charger Current (CHRGISNSP-CHRGISNSN) -0.25V - 0.25V x4 +5 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V No +6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V / No / + 1.50 - 3.50V -1.20V +7 General Purpose ADIN7 / UID / Die Temperature 0 - 2.30V / No / + 0 - 2.55V / x0.9 / No +8 General Purpose ADIN8 0 - 2.30V No +9 General Purpose ADIN9 0 - 2.30V No +10 General Purpose ADIN10 0 - 2.30V No +11 General Purpose ADIN11 0 - 2.30V No +12 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.30V No +13 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.30V No +14 General Purpose TSY1 / Touchscreen Y-plate 1 0 - 2.30V No +15 General Purpose TSY2 / Touchscreen Y-plate 2 0 - 2.30V No diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface index dcbd502c879..3de6b0bcb14 100644 --- a/Documentation/hwmon/sysfs-interface +++ b/Documentation/hwmon/sysfs-interface @@ -225,8 +225,6 @@ pwm[1-*]_auto_point[1-*]_temp_hyst to PWM output channels. RW -OR - temp[1-*]_auto_point[1-*]_pwm temp[1-*]_auto_point[1-*]_temp temp[1-*]_auto_point[1-*]_temp_hyst @@ -235,6 +233,15 @@ temp[1-*]_auto_point[1-*]_temp_hyst to temperature channels. RW +There is a third case where trip points are associated to both PWM output +channels and temperature channels: the PWM values are associated to PWM +output channels while the temperature values are associated to temperature +channels. In that case, the result is determined by the mapping between +temperature inputs and PWM outputs. When several temperature inputs are +mapped to a given PWM output, this leads to several candidate PWM values. +The actual result is up to the chip, but in general the highest candidate +value (fastest fan speed) wins. + **************** * Temperatures * @@ -353,10 +360,20 @@ power[1-*]_average Average power use Unit: microWatt RO -power[1-*]_average_interval Power use averaging interval +power[1-*]_average_interval Power use averaging interval. A poll + notification is sent to this file if the + hardware changes the averaging interval. Unit: milliseconds RW +power[1-*]_average_interval_max Maximum power use averaging interval + Unit: milliseconds + RO + +power[1-*]_average_interval_min Minimum power use averaging interval + Unit: milliseconds + RO + power[1-*]_average_highest Historical average maximum power use Unit: microWatt RO @@ -365,6 +382,18 @@ power[1-*]_average_lowest Historical average minimum power use Unit: microWatt RO +power[1-*]_average_max A poll notification is sent to + power[1-*]_average when power use + rises above this value. + Unit: microWatt + RW + +power[1-*]_average_min A poll notification is sent to + power[1-*]_average when power use + sinks below this value. + Unit: microWatt + RW + power[1-*]_input Instantaneous power use Unit: microWatt RO @@ -381,6 +410,39 @@ power[1-*]_reset_history Reset input_highest, input_lowest, average_highest and average_lowest. WO +power[1-*]_accuracy Accuracy of the power meter. + Unit: Percent + RO + +power[1-*]_alarm 1 if the system is drawing more power than the + cap allows; 0 otherwise. A poll notification is + sent to this file when the power use exceeds the + cap. This file only appears if the cap is known + to be enforced by hardware. + RO + +power[1-*]_cap If power use rises above this limit, the + system should take action to reduce power use. + A poll notification is sent to this file if the + cap is changed by the hardware. The *_cap + files only appear if the cap is known to be + enforced by hardware. + Unit: microWatt + RW + +power[1-*]_cap_hyst Margin of hysteresis built around capping and + notification. + Unit: microWatt + RW + +power[1-*]_cap_max Maximum cap that can be set. + Unit: microWatt + RO + +power[1-*]_cap_min Minimum cap that can be set. + Unit: microWatt + RO + ********** * Energy * ********** diff --git a/Documentation/hwmon/w83627hf b/Documentation/hwmon/w83627hf index 6ee36dbafd6..44dd2bcc72b 100644 --- a/Documentation/hwmon/w83627hf +++ b/Documentation/hwmon/w83627hf @@ -32,8 +32,6 @@ Authors: Module Parameters ----------------- -* force_addr: int - Initialize the ISA address of the sensors * force_i2c: int Initialize the I2C address of the sensors * init: int @@ -70,3 +68,30 @@ doesn't help, you may just ignore the bogus VID reading with no harm done. For further information on this driver see the w83781d driver documentation. [1] http://www.lm-sensors.org/browser/lm-sensors/trunk/doc/vid + +Forcing the address +------------------- + +The driver used to have a module parameter named force_addr, which could +be used to force the base I/O address of the hardware monitoring block. +This was meant as a workaround for mainboards with a broken BIOS. This +module parameter is gone for technical reasons. If you need this feature, +you can obtain the same result by using the isaset tool (part of +lm-sensors) before loading the driver: + +# Enter the Super I/O config space +isaset -y -f 0x2e 0x87 +isaset -y -f 0x2e 0x87 + +# Select the hwmon logical device +isaset -y 0x2e 0x2f 0x07 0x0b + +# Set the base I/O address (to 0x290 in this example) +isaset -y 0x2e 0x2f 0x60 0x02 +isaset -y 0x2e 0x2f 0x61 0x90 + +# Exit the Super-I/O config space +isaset -y -f 0x2e 0xaa + +The above sequence assumes a Super-I/O config space at 0x2e/0x2f, but +0x4e/0x4f is also possible. diff --git a/Documentation/i2c/busses/i2c-piix4 b/Documentation/i2c/busses/i2c-piix4 index c5b37c57055..ac540c71c7e 100644 --- a/Documentation/i2c/busses/i2c-piix4 +++ b/Documentation/i2c/busses/i2c-piix4 @@ -8,7 +8,7 @@ Supported adapters: Datasheet: Only available via NDA from ServerWorks * ATI IXP200, IXP300, IXP400, SB600, SB700 and SB800 southbridges Datasheet: Not publicly available - * AMD SB900 + * AMD Hudson-2 Datasheet: Not publicly available * Standard Microsystems (SMSC) SLC90E66 (Victory66) southbridge Datasheet: Publicly available at the SMSC website http://www.smsc.com diff --git a/Documentation/i2c/busses/i2c-voodoo3 b/Documentation/i2c/busses/i2c-voodoo3 deleted file mode 100644 index 62d90a454d3..00000000000 --- a/Documentation/i2c/busses/i2c-voodoo3 +++ /dev/null @@ -1,62 +0,0 @@ -Kernel driver i2c-voodoo3 - -Supported adapters: - * 3dfx Voodoo3 based cards - * Voodoo Banshee based cards - -Authors: - Frodo Looijaard <frodol@dds.nl>, - Philip Edelbrock <phil@netroedge.com>, - Ralph Metzler <rjkm@thp.uni-koeln.de>, - Mark D. Studebaker <mdsxyz123@yahoo.com> - -Main contact: Philip Edelbrock <phil@netroedge.com> - -The code is based upon Ralph's test code (he did the hard stuff ;') - -Description ------------ - -The 3dfx Voodoo3 chip contains two I2C interfaces (aka a I2C 'master' or -'host'). - -The first interface is used for DDC (Data Display Channel) which is a -serial channel through the VGA monitor connector to a DDC-compliant -monitor. This interface is defined by the Video Electronics Standards -Association (VESA). The standards are available for purchase at -http://www.vesa.org . - -The second interface is a general-purpose I2C bus. The intent by 3dfx was -to allow manufacturers to add extra chips to the video card such as a -TV-out chip such as the BT869 or possibly even I2C based temperature -sensors like the ADM1021 or LM75. - -Stability ---------- - -Seems to be stable on the test machine, but needs more testing on other -machines. Simultaneous accesses of the DDC and I2C busses may cause errors. - -Supported Devices ------------------ - -Specifically, this driver was written and tested on the '3dfx Voodoo3 AGP -3000' which has a tv-out feature (s-video or composite). According to the -docs and discussions, this code should work for any Voodoo3 based cards as -well as Voodoo Banshee based cards. The DDC interface has been tested on a -Voodoo Banshee card. - -Issues ------- - -Probably many, but it seems to work OK on my system. :') - - -External Device Connection --------------------------- - -The digital video input jumpers give availability to the I2C bus. -Specifically, pins 13 and 25 (bottom row middle, and bottom right-end) are -the I2C clock and I2C data lines, respectively. +5V and GND are probably -also easily available making the addition of extra I2C/SMBus devices easy -to implement. diff --git a/Documentation/i2c/i2c-stub b/Documentation/i2c/i2c-stub index 0d8be1c20c1..fa4b669c166 100644 --- a/Documentation/i2c/i2c-stub +++ b/Documentation/i2c/i2c-stub @@ -2,9 +2,9 @@ MODULE: i2c-stub DESCRIPTION: -This module is a very simple fake I2C/SMBus driver. It implements four -types of SMBus commands: write quick, (r/w) byte, (r/w) byte data, and -(r/w) word data. +This module is a very simple fake I2C/SMBus driver. It implements five +types of SMBus commands: write quick, (r/w) byte, (r/w) byte data, (r/w) +word data, and (r/w) I2C block data. You need to provide chip addresses as a module parameter when loading this driver, which will then only react to SMBus commands to these addresses. @@ -21,8 +21,8 @@ EEPROMs, among others. The typical use-case is like this: 1. load this module - 2. use i2cset (from lm_sensors project) to pre-load some data - 3. load the target sensors chip driver module + 2. use i2cset (from the i2c-tools project) to pre-load some data + 3. load the target chip driver module 4. observe its behavior in the kernel log There's a script named i2c-stub-from-dump in the i2c-tools package which @@ -33,6 +33,12 @@ PARAMETERS: int chip_addr[10]: The SMBus addresses to emulate chips at. +unsigned long functionality: + Functionality override, to disable some commands. See I2C_FUNC_* + constants in <linux/i2c.h> for the suitable values. For example, + value 0x1f0000 would only enable the quick, byte and byte data + commands. + CAVEATS: If your target driver polls some byte or word waiting for it to change, the diff --git a/Documentation/i2c/old-module-parameters b/Documentation/i2c/old-module-parameters new file mode 100644 index 00000000000..8e2b629d533 --- /dev/null +++ b/Documentation/i2c/old-module-parameters @@ -0,0 +1,44 @@ +I2C device driver binding control from user-space +================================================= + +Up to kernel 2.6.32, many i2c drivers used helper macros provided by +<linux/i2c.h> which created standard module parameters to let the user +control how the driver would probe i2c buses and attach to devices. These +parameters were known as "probe" (to let the driver probe for an extra +address), "force" (to forcibly attach the driver to a given device) and +"ignore" (to prevent a driver from probing a given address). + +With the conversion of the i2c subsystem to the standard device driver +binding model, it became clear that these per-module parameters were no +longer needed, and that a centralized implementation was possible. The new, +sysfs-based interface is described in the documentation file +"instantiating-devices", section "Method 4: Instantiate from user-space". + +Below is a mapping from the old module parameters to the new interface. + +Attaching a driver to an I2C device +----------------------------------- + +Old method (module parameters): +# modprobe <driver> probe=1,0x2d +# modprobe <driver> force=1,0x2d +# modprobe <driver> force_<device>=1,0x2d + +New method (sysfs interface): +# echo <device> 0x2d > /sys/bus/i2c/devices/i2c-1/new_device + +Preventing a driver from attaching to an I2C device +--------------------------------------------------- + +Old method (module parameters): +# modprobe <driver> ignore=1,0x2f + +New method (sysfs interface): +# echo dummy 0x2f > /sys/bus/i2c/devices/i2c-1/new_device +# modprobe <driver> + +Of course, it is important to instantiate the "dummy" device before loading +the driver. The dummy device will be handled by i2c-core itself, preventing +other drivers from binding to it later on. If there is a real device at the +problematic address, and you want another driver to bind to it, then simply +pass the name of the device in question instead of "dummy". diff --git a/Documentation/infiniband/user_mad.txt b/Documentation/infiniband/user_mad.txt index 744687dd195..8a366959f5c 100644 --- a/Documentation/infiniband/user_mad.txt +++ b/Documentation/infiniband/user_mad.txt @@ -128,8 +128,8 @@ Setting IsSM Capability Bit To create the appropriate character device files automatically with udev, a rule like - KERNEL="umad*", NAME="infiniband/%k" - KERNEL="issm*", NAME="infiniband/%k" + KERNEL=="umad*", NAME="infiniband/%k" + KERNEL=="issm*", NAME="infiniband/%k" can be used. This will create device nodes named diff --git a/Documentation/infiniband/user_verbs.txt b/Documentation/infiniband/user_verbs.txt index f847501e50b..afe3f8da901 100644 --- a/Documentation/infiniband/user_verbs.txt +++ b/Documentation/infiniband/user_verbs.txt @@ -58,7 +58,7 @@ Memory pinning To create the appropriate character device files automatically with udev, a rule like - KERNEL="uverbs*", NAME="infiniband/%k" + KERNEL=="uverbs*", NAME="infiniband/%k" can be used. This will create device nodes named diff --git a/Documentation/isdn/INTERFACE.CAPI b/Documentation/isdn/INTERFACE.CAPI index 686e107923e..5fe8de5cc72 100644 --- a/Documentation/isdn/INTERFACE.CAPI +++ b/Documentation/isdn/INTERFACE.CAPI @@ -60,10 +60,9 @@ open() operation on regular files or character devices. After a successful return from register_appl(), CAPI messages from the application may be passed to the driver for the device via calls to the -send_message() callback function. The CAPI message to send is stored in the -data portion of an skb. Conversely, the driver may call Kernel CAPI's -capi_ctr_handle_message() function to pass a received CAPI message to Kernel -CAPI for forwarding to an application, specifying its ApplID. +send_message() callback function. Conversely, the driver may call Kernel +CAPI's capi_ctr_handle_message() function to pass a received CAPI message to +Kernel CAPI for forwarding to an application, specifying its ApplID. Deregistration requests (CAPI operation CAPI_RELEASE) from applications are forwarded as calls to the release_appl() callback function, passing the same @@ -142,6 +141,7 @@ u16 (*send_message)(struct capi_ctr *ctrlr, struct sk_buff *skb) to accepting or queueing the message. Errors occurring during the actual processing of the message should be signaled with an appropriate reply message. + May be called in process or interrupt context. Calls to this function are not serialized by Kernel CAPI, ie. it must be prepared to be re-entered. @@ -154,7 +154,8 @@ read_proc_t *ctr_read_proc system entry, /proc/capi/controllers/<n>; will be called with a pointer to the device's capi_ctr structure as the last (data) argument -Note: Callback functions are never called in interrupt context. +Note: Callback functions except send_message() are never called in interrupt +context. - to be filled in before calling capi_ctr_ready(): @@ -171,14 +172,40 @@ u8 serial[CAPI_SERIAL_LEN] value to return for CAPI_GET_SERIAL -4.3 The _cmsg Structure +4.3 SKBs + +CAPI messages are passed between Kernel CAPI and the driver via send_message() +and capi_ctr_handle_message(), stored in the data portion of a socket buffer +(skb). Each skb contains a single CAPI message coded according to the CAPI 2.0 +standard. + +For the data transfer messages, DATA_B3_REQ and DATA_B3_IND, the actual +payload data immediately follows the CAPI message itself within the same skb. +The Data and Data64 parameters are not used for processing. The Data64 +parameter may be omitted by setting the length field of the CAPI message to 22 +instead of 30. + + +4.4 The _cmsg Structure (declared in <linux/isdn/capiutil.h>) The _cmsg structure stores the contents of a CAPI 2.0 message in an easily -accessible form. It contains members for all possible CAPI 2.0 parameters, of -which only those appearing in the message type currently being processed are -actually used. Unused members should be set to zero. +accessible form. It contains members for all possible CAPI 2.0 parameters, +including subparameters of the Additional Info and B Protocol structured +parameters, with the following exceptions: + +* second Calling party number (CONNECT_IND) + +* Data64 (DATA_B3_REQ and DATA_B3_IND) + +* Sending complete (subparameter of Additional Info, CONNECT_REQ and INFO_REQ) + +* Global Configuration (subparameter of B Protocol, CONNECT_REQ, CONNECT_RESP + and SELECT_B_PROTOCOL_REQ) + +Only those parameters appearing in the message type currently being processed +are actually used. Unused members should be set to zero. Members are named after the CAPI 2.0 standard names of the parameters they represent. See <linux/isdn/capiutil.h> for the exact spelling. Member data @@ -190,18 +217,19 @@ u16 for CAPI parameters of type 'word' u32 for CAPI parameters of type 'dword' -_cstruct for CAPI parameters of type 'struct' not containing any - variably-sized (struct) subparameters (eg. 'Called Party Number') +_cstruct for CAPI parameters of type 'struct' The member is a pointer to a buffer containing the parameter in CAPI encoding (length + content). It may also be NULL, which will be taken to represent an empty (zero length) parameter. + Subparameters are stored in encoded form within the content part. -_cmstruct for CAPI parameters of type 'struct' containing 'struct' - subparameters ('Additional Info' and 'B Protocol') +_cmstruct alternative representation for CAPI parameters of type 'struct' + (used only for the 'Additional Info' and 'B Protocol' parameters) The representation is a single byte containing one of the values: - CAPI_DEFAULT: the parameter is empty - CAPI_COMPOSE: the values of the subparameters are stored - individually in the corresponding _cmsg structure members + CAPI_DEFAULT: The parameter is empty/absent. + CAPI_COMPOSE: The parameter is present. + Subparameter values are stored individually in the corresponding + _cmsg structure members. Functions capi_cmsg2message() and capi_message2cmsg() are provided to convert messages between their transport encoding described in the CAPI 2.0 standard @@ -297,3 +325,26 @@ char *capi_cmd2str(u8 Command, u8 Subcommand) be NULL if the command/subcommand is not one of those defined in the CAPI 2.0 standard. + +7. Debugging + +The module kernelcapi has a module parameter showcapimsgs controlling some +debugging output produced by the module. It can only be set when the module is +loaded, via a parameter "showcapimsgs=<n>" to the modprobe command, either on +the command line or in the configuration file. + +If the lowest bit of showcapimsgs is set, kernelcapi logs controller and +application up and down events. + +In addition, every registered CAPI controller has an associated traceflag +parameter controlling how CAPI messages sent from and to tha controller are +logged. The traceflag parameter is initialized with the value of the +showcapimsgs parameter when the controller is registered, but can later be +changed via the MANUFACTURER_REQ command KCAPI_CMD_TRACE. + +If the value of traceflag is non-zero, CAPI messages are logged. +DATA_B3 messages are only logged if the value of traceflag is > 2. + +If the lowest bit of traceflag is set, only the command/subcommand and message +length are logged. Otherwise, kernelcapi logs a readable representation of +the entire message. diff --git a/Documentation/isdn/README.gigaset b/Documentation/isdn/README.gigaset index f9963103ae3..794941fc949 100644 --- a/Documentation/isdn/README.gigaset +++ b/Documentation/isdn/README.gigaset @@ -5,7 +5,7 @@ GigaSet 307x Device Driver ------------ 1.1. Hardware -------- - This release supports the connection of the Gigaset 307x/417x family of + This driver supports the connection of the Gigaset 307x/417x family of ISDN DECT bases via Gigaset M101 Data, Gigaset M105 Data or direct USB connection. The following devices are reported to be compatible: @@ -33,7 +33,7 @@ GigaSet 307x Device Driver http://gigaset307x.sourceforge.net/ We had also reports from users of Gigaset M105 who could use the drivers - with SX 100 and CX 100 ISDN bases (only in unimodem mode, see section 2.4.) + with SX 100 and CX 100 ISDN bases (only in unimodem mode, see section 2.5.) If you have another device that works with our driver, please let us know. Chances of getting an USB device to work are good if the output of @@ -49,7 +49,7 @@ GigaSet 307x Device Driver -------- The driver works with ISDN4linux and so can be used with any software which is able to use ISDN4linux for ISDN connections (voice or data). - CAPI4Linux support is planned but not yet available. + Experimental Kernel CAPI support is available as a compilation option. There are some user space tools available at http://sourceforge.net/projects/gigaset307x/ @@ -68,22 +68,38 @@ GigaSet 307x Device Driver for troubleshooting or to pass module parameters. The module ser_gigaset provides a serial line discipline N_GIGASET_M101 - which drives the device through the regular serial line driver. It must - be attached to the serial line to which the M101 is connected with the - ldattach(8) command (requires util-linux-ng release 2.14 or later), for - example: - ldattach GIGASET_M101 /dev/ttyS1 + which uses the regular serial port driver to access the device, and must + therefore be attached to the serial device to which the M101 is connected. + The ldattach(8) command (included in util-linux-ng release 2.14 or later) + can be used for that purpose, for example: + ldattach GIGASET_M101 /dev/ttyS1 This will open the device file, attach the line discipline to it, and then sleep in the background, keeping the device open so that the line discipline remains active. To deactivate it, kill the daemon, for example with - killall ldattach + killall ldattach before disconnecting the device. To have this happen automatically at system startup/shutdown on an LSB compatible system, create and activate an appropriate LSB startup script /etc/init.d/gigaset. (The init name 'gigaset' is officially assigned to this project by LANANA.) Alternatively, just add the 'ldattach' command line to /etc/rc.local. + The modules accept the following parameters: + + Module Parameter Meaning + + gigaset debug debug level (see section 3.2.) + + startmode initial operation mode (see section 2.5.): + bas_gigaset ) 1=ISDN4linux/CAPI (default), 0=Unimodem + ser_gigaset ) + usb_gigaset ) cidmode initial Call-ID mode setting (see section + 2.5.): 1=on (default), 0=off + + Depending on your distribution you may want to create a separate module + configuration file /etc/modprobe.d/gigaset for these, or add them to a + custom file like /etc/modprobe.conf.local. + 2.2. Device nodes for user space programs ------------------------------------ The device can be accessed from user space (eg. by the user space tools @@ -93,29 +109,83 @@ GigaSet 307x Device Driver - /dev/ttyGU0 for M105 (USB data boxes) - /dev/ttyGB0 for the base driver (direct USB connection) - You can also select a "default device" which is used by the frontends when + If you connect more than one device of a type, they will get consecutive + device nodes, eg. /dev/ttyGU1 for a second M105. + + You can also set a "default device" for the user space tools to use when no device node is given as parameter, by creating a symlink /dev/ttyG to one of them, eg.: - ln -s /dev/ttyGB0 /dev/ttyG + ln -s /dev/ttyGB0 /dev/ttyG + + The devices accept the following device specific ioctl calls + (defined in gigaset_dev.h): + + ioctl(int fd, GIGASET_REDIR, int *cmd); + If cmd==1, the device is set to be controlled exclusively through the + character device node; access from the ISDN subsystem is blocked. + If cmd==0, the device is set to be used from the ISDN subsystem and does + not communicate through the character device node. + + ioctl(int fd, GIGASET_CONFIG, int *cmd); + (ser_gigaset and usb_gigaset only) + If cmd==1, the device is set to adapter configuration mode where commands + are interpreted by the M10x DECT adapter itself instead of being + forwarded to the base station. In this mode, the device accepts the + commands described in Siemens document "AT-Kommando Alignment M10x Data" + for setting the operation mode, associating with a base station and + querying parameters like field strengh and signal quality. + Note that there is no ioctl command for leaving adapter configuration + mode and returning to regular operation. In order to leave adapter + configuration mode, write the command ATO to the device. + + ioctl(int fd, GIGASET_BRKCHARS, unsigned char brkchars[6]); + (usb_gigaset only) + Set the break characters on an M105's internal serial adapter to the six + bytes stored in brkchars[]. Unused bytes should be set to zero. + + ioctl(int fd, GIGASET_VERSION, unsigned version[4]); + Retrieve version information from the driver. version[0] must be set to + one of: + - GIGVER_DRIVER: retrieve driver version + - GIGVER_COMPAT: retrieve interface compatibility version + - GIGVER_FWBASE: retrieve the firmware version of the base + Upon return, version[] is filled with the requested version information. 2.3. ISDN4linux ---------- This is the "normal" mode of operation. After loading the module you can - set up the ISDN system just as you'd do with any ISDN card. - Your distribution should provide some configuration utility. - If not, you can use some HOWTOs like + set up the ISDN system just as you'd do with any ISDN card supported by + the ISDN4Linux subsystem. Most distributions provide some configuration + utility. If not, you can use some HOWTOs like http://www.linuxhaven.de/dlhp/HOWTO/DE-ISDN-HOWTO-5.html - If this doesn't work, because you have some recent device like SX100 where + If this doesn't work, because you have some device like SX100 where debug output (see section 3.2.) shows something like this when dialing CMD Received: ERROR Available Params: 0 Connection State: 0, Response: -1 gigaset_process_response: resp_code -1 in ConState 0 ! Timeout occurred - you might need to use unimodem mode: - -2.4. Unimodem mode + you probably need to use unimodem mode. (see section 2.5.) + +2.4. CAPI + ---- + If the driver is compiled with CAPI support (kernel configuration option + GIGASET_CAPI, experimental) it can also be used with CAPI 2.0 kernel and + user space applications. For user space access, the module capi.ko must + be loaded. The capiinit command (included in the capi4k-utils package) + does this for you. + + The CAPI variant of the driver supports legacy ISDN4Linux applications + via the capidrv compatibility driver. The kernel module capidrv.ko must + be loaded explicitly with the command + modprobe capidrv + if needed, and cannot be unloaded again without unloading the driver + first. (These are limitations of capidrv.) + + The note about unimodem mode in the preceding section applies here, too. + +2.5. Unimodem mode ------------- This is needed for some devices [e.g. SX100] as they have problems with the "normal" commands. @@ -126,9 +196,14 @@ GigaSet 307x Device Driver You can switch back using gigacontr --mode isdn - You can also load the driver using e.g. - modprobe usb_gigaset startmode=0 - to prevent the driver from starting in "isdn4linux mode". + You can also put the driver directly into Unimodem mode when it's loaded, + by passing the module parameter startmode=0 to the hardware specific + module, e.g. + modprobe usb_gigaset startmode=0 + or by adding a line like + options usb_gigaset startmode=0 + to an appropriate module configuration file, like /etc/modprobe.d/gigaset + or /etc/modprobe.conf.local. In this mode the device works like a modem connected to a serial port (the /dev/ttyGU0, ... mentioned above) which understands the commands @@ -156,11 +231,10 @@ GigaSet 307x Device Driver options ppp_async flag_time=0 - to /etc/modprobe.conf. If your distribution has some local module - configuration file like /etc/modprobe.conf.local, - using that should be preferred. + to an appropriate module configuration file, like /etc/modprobe.d/gigaset + or /etc/modprobe.conf.local. -2.5. Call-ID (CID) mode +2.6. Call-ID (CID) mode ------------------ Call-IDs are numbers used to tag commands to, and responses from, the Gigaset base in order to support the simultaneous handling of multiple @@ -181,14 +255,15 @@ GigaSet 307x Device Driver settings (CID mode). - If you have several DECT data devices (M10x) which you want to use in turn, select Unimodem mode by passing the parameter "cidmode=0" to - the driver ("modprobe usb_gigaset cidmode=0" or modprobe.conf). + the appropriate driver module (ser_gigaset or usb_gigaset). If you want both of these at once, you are out of luck. - You can also use /sys/class/tty/ttyGxy/cidmode for changing the CID mode - setting (ttyGxy is ttyGU0 or ttyGB0). + You can also use the tty class parameter "cidmode" of the device to + change its CID mode while the driver is loaded, eg. + echo 0 > /sys/class/tty/ttyGU0/cidmode -2.6. Unregistered Wireless Devices (M101/M105) +2.7. Unregistered Wireless Devices (M101/M105) ----------------------------------------- The main purpose of the ser_gigaset and usb_gigaset drivers is to allow the M101 and M105 wireless devices to be used as ISDN devices for ISDN @@ -200,7 +275,7 @@ GigaSet 307x Device Driver driver. In that situation, a restricted set of functions is available which includes, in particular, those necessary for registering the device to a base or for switching it between Fixed Part and Portable Part - modes. + modes. See the gigacontr(8) manpage for details. 3. Troubleshooting --------------- @@ -214,9 +289,7 @@ GigaSet 307x Device Driver options isdn dialtimeout=15 - to /etc/modprobe.conf. If your distribution has some local module - configuration file like /etc/modprobe.conf.local, - using that should be preferred. + to /etc/modprobe.d/gigaset, /etc/modprobe.conf.local or a similar file. Problem: Your isdn script aborts with a message about isdnlog. @@ -228,7 +301,7 @@ GigaSet 307x Device Driver You have two or more DECT data adapters (M101/M105) and only the first one you turn on works. Solution: - Select Unimodem mode for all DECT data adapters. (see section 2.4.) + Select Unimodem mode for all DECT data adapters. (see section 2.5.) Problem: Messages like this: @@ -236,7 +309,7 @@ GigaSet 307x Device Driver appear in your syslog. Solution: Check whether your M10x wireless device is correctly registered to the - Gigaset base. (see section 2.6.) + Gigaset base. (see section 2.7.) 3.2. Telling the driver to provide more information ---------------------------------------------- @@ -256,7 +329,8 @@ GigaSet 307x Device Driver The initial value can be set using the debug parameter when loading the module "gigaset", e.g. by adding a line options gigaset debug=0 - to /etc/modprobe.conf, ... + to your module configuration file, eg. /etc/modprobe.d/gigaset or + /etc/modprobe.conf.local. Generated debugging information can be found - as output of the command diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 6fa7292947e..3f886e298f6 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -85,7 +85,6 @@ parameter is applicable: PPT Parallel port support is enabled. PS2 Appropriate PS/2 support is enabled. RAM RAM disk support is enabled. - ROOTPLUG The example Root Plug LSM is enabled. S390 S390 architecture is enabled. SCSI Appropriate SCSI support is enabled. A lot of drivers has their options described inside of @@ -345,6 +344,15 @@ and is between 256 and 4096 characters. It is defined in the file Change the amount of debugging information output when initialising the APIC and IO-APIC components. + show_lapic= [APIC,X86] Advanced Programmable Interrupt Controller + Limit apic dumping. The parameter defines the maximal + number of local apics being dumped. Also it is possible + to set it to "all" by meaning -- no limit here. + Format: { 1 (default) | 2 | ... | all }. + The parameter valid if only apic=debug or + apic=verbose is specified. + Example: apic=debug show_lapic=all + apm= [APM] Advanced Power Management See header of arch/x86/kernel/apm_32.c. @@ -671,6 +679,7 @@ and is between 256 and 4096 characters. It is defined in the file earlyprintk= [X86,SH,BLACKFIN] earlyprintk=vga earlyprintk=serial[,ttySn[,baudrate]] + earlyprintk=ttySn[,baudrate] earlyprintk=dbgp[debugController#] Append ",keep" to not disable it when the real console @@ -778,6 +787,13 @@ and is between 256 and 4096 characters. It is defined in the file by the set_ftrace_notrace file in the debugfs tracing directory. + ftrace_graph_filter=[function-list] + [FTRACE] Limit the top level callers functions traced + by the function graph tracer at boot up. + function-list is a comma separated list of functions + that can be changed at run time by the + set_graph_function file in the debugfs tracing directory. + gamecon.map[2|3]= [HW,JOY] Multisystem joystick and NES/SNES/PSX pad support via parallel port (up to 5 devices per port) @@ -2031,8 +2047,15 @@ and is between 256 and 4096 characters. It is defined in the file print-fatal-signals= [KNL] debug: print fatal signals - print-fatal-signals=1: print segfault info to - the kernel console. + + If enabled, warn about various signal handling + related application anomalies: too many signals, + too many POSIX.1 timers, fatal signals causing a + coredump - etc. + + If you hit the warning due to signal overflow, + you might want to try "ulimit -i unlimited". + default: off. printk.time= Show timing data prefixed to each printk message line @@ -2163,15 +2186,6 @@ and is between 256 and 4096 characters. It is defined in the file Useful for devices that are detected asynchronously (e.g. USB and MMC devices). - root_plug.vendor_id= - [ROOTPLUG] Override the default vendor ID - - root_plug.product_id= - [ROOTPLUG] Override the default product ID - - root_plug.debug= - [ROOTPLUG] Enable debugging output - rw [KNL] Mount root device read-write on boot S [KNL] Run init in single mode @@ -2181,6 +2195,8 @@ and is between 256 and 4096 characters. It is defined in the file sbni= [NET] Granch SBNI12 leased line adapter + sched_debug [KNL] Enables verbose scheduler debug messages. + sc1200wdt= [HW,WDT] SC1200 WDT (watchdog) driver Format: <io>[,<timeout>[,<isapnp>]] @@ -2589,6 +2605,9 @@ and is between 256 and 4096 characters. It is defined in the file uart6850= [HW,OSS] Format: <io>,<irq> + uhash_entries= [KNL,NET] + Set number of hash buckets for UDP/UDP-Lite connections + uhci-hcd.ignore_oc= [USB] Ignore overcurrent events (default N). Some badly-designed motherboards generate lots of @@ -2644,6 +2663,8 @@ and is between 256 and 4096 characters. It is defined in the file to a common usb-storage quirk flag as follows: a = SANE_SENSE (collect more than 18 bytes of sense data); + b = BAD_SENSE (don't collect more than 18 + bytes of sense data); c = FIX_CAPACITY (decrease the reported device capacity by one sector); h = CAPACITY_HEURISTICS (decrease the @@ -2728,6 +2749,15 @@ and is between 256 and 4096 characters. It is defined in the file Default is 1, i.e. UTF-8 mode is enabled for all newly opened terminals. + vt.global_cursor_default= + [VT] + Format=<-1|0|1> + Set system-wide default for whether a cursor + is shown on new VTs. Default is -1, + i.e. cursors will be created by default unless + overridden by individual drivers. 0 will hide + cursors, 1 will display them. + waveartist= [HW,OSS] Format: <io>,<irq>,<dma>,<dma2> diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt index 5a4bc8cf6d0..e1a11416102 100644 --- a/Documentation/kvm/api.txt +++ b/Documentation/kvm/api.txt @@ -593,6 +593,115 @@ struct kvm_irqchip { } chip; }; +4.27 KVM_XEN_HVM_CONFIG + +Capability: KVM_CAP_XEN_HVM +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_xen_hvm_config (in) +Returns: 0 on success, -1 on error + +Sets the MSR that the Xen HVM guest uses to initialize its hypercall +page, and provides the starting address and size of the hypercall +blobs in userspace. When the guest writes the MSR, kvm copies one +page of a blob (32- or 64-bit, depending on the vcpu mode) to guest +memory. + +struct kvm_xen_hvm_config { + __u32 flags; + __u32 msr; + __u64 blob_addr_32; + __u64 blob_addr_64; + __u8 blob_size_32; + __u8 blob_size_64; + __u8 pad2[30]; +}; + +4.27 KVM_GET_CLOCK + +Capability: KVM_CAP_ADJUST_CLOCK +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_clock_data (out) +Returns: 0 on success, -1 on error + +Gets the current timestamp of kvmclock as seen by the current guest. In +conjunction with KVM_SET_CLOCK, it is used to ensure monotonicity on scenarios +such as migration. + +struct kvm_clock_data { + __u64 clock; /* kvmclock current value */ + __u32 flags; + __u32 pad[9]; +}; + +4.28 KVM_SET_CLOCK + +Capability: KVM_CAP_ADJUST_CLOCK +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_clock_data (in) +Returns: 0 on success, -1 on error + +Sets the current timestamp of kvmclock to the valued specific in its parameter. +In conjunction with KVM_GET_CLOCK, it is used to ensure monotonicity on scenarios +such as migration. + +struct kvm_clock_data { + __u64 clock; /* kvmclock current value */ + __u32 flags; + __u32 pad[9]; +}; + +4.29 KVM_GET_VCPU_EVENTS + +Capability: KVM_CAP_VCPU_EVENTS +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_vcpu_event (out) +Returns: 0 on success, -1 on error + +Gets currently pending exceptions, interrupts, and NMIs as well as related +states of the vcpu. + +struct kvm_vcpu_events { + struct { + __u8 injected; + __u8 nr; + __u8 has_error_code; + __u8 pad; + __u32 error_code; + } exception; + struct { + __u8 injected; + __u8 nr; + __u8 soft; + __u8 pad; + } interrupt; + struct { + __u8 injected; + __u8 pending; + __u8 masked; + __u8 pad; + } nmi; + __u32 sipi_vector; + __u32 flags; /* must be zero */ +}; + +4.30 KVM_SET_VCPU_EVENTS + +Capability: KVM_CAP_VCPU_EVENTS +Architectures: x86 +Type: vm ioctl +Parameters: struct kvm_vcpu_event (in) +Returns: 0 on success, -1 on error + +Set pending exceptions, interrupts, and NMIs as well as related states of the +vcpu. + +See KVM_GET_VCPU_EVENTS for the data structure. + + 5. The kvm_run structure Application code obtains a pointer to the kvm_run structure by diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c index ba9373f82ab..42208511b5c 100644 --- a/Documentation/lguest/lguest.c +++ b/Documentation/lguest/lguest.c @@ -42,7 +42,6 @@ #include <signal.h> #include "linux/lguest_launcher.h" #include "linux/virtio_config.h" -#include <linux/virtio_ids.h> #include "linux/virtio_net.h" #include "linux/virtio_blk.h" #include "linux/virtio_console.h" @@ -305,7 +304,7 @@ static void *map_zeroed_pages(unsigned int num) addr = mmap(NULL, getpagesize() * num, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, fd, 0); if (addr == MAP_FAILED) - err(1, "Mmaping %u pages of /dev/zero", num); + err(1, "Mmapping %u pages of /dev/zero", num); /* * One neat mmap feature is that you can close the fd, and it diff --git a/Documentation/lockstat.txt b/Documentation/lockstat.txt index 9cb9138f7a7..65f4c795015 100644 --- a/Documentation/lockstat.txt +++ b/Documentation/lockstat.txt @@ -62,8 +62,20 @@ applicable). It also tracks 4 contention points per class. A contention point is a call site that had to wait on lock acquisition. + - CONFIGURATION + +Lock statistics are enabled via CONFIG_LOCK_STATS. + - USAGE +Enable collection of statistics: + +# echo 1 >/proc/sys/kernel/lock_stat + +Disable collection of statistics: + +# echo 0 >/proc/sys/kernel/lock_stat + Look at the current lock statistics: ( line numbers not part of actual output, done for clarity in the explanation diff --git a/Documentation/c2port.txt b/Documentation/misc-devices/c2port.txt index d9bf93ea439..d9bf93ea439 100644 --- a/Documentation/c2port.txt +++ b/Documentation/misc-devices/c2port.txt diff --git a/Documentation/ics932s401 b/Documentation/misc-devices/ics932s401 index 07a739f406d..07a739f406d 100644 --- a/Documentation/ics932s401 +++ b/Documentation/misc-devices/ics932s401 diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt index d5181ce9ff6..61f516b135b 100644 --- a/Documentation/networking/bonding.txt +++ b/Documentation/networking/bonding.txt @@ -1,7 +1,7 @@ Linux Ethernet Bonding Driver HOWTO - Latest update: 12 November 2007 + Latest update: 23 September 2009 Initial release : Thomas Davis <tadavis at lbl.gov> Corrections, HA extensions : 2000/10/03-15 : @@ -614,6 +614,46 @@ primary The primary option is only valid for active-backup mode. +primary_reselect + + Specifies the reselection policy for the primary slave. This + affects how the primary slave is chosen to become the active slave + when failure of the active slave or recovery of the primary slave + occurs. This option is designed to prevent flip-flopping between + the primary slave and other slaves. Possible values are: + + always or 0 (default) + + The primary slave becomes the active slave whenever it + comes back up. + + better or 1 + + The primary slave becomes the active slave when it comes + back up, if the speed and duplex of the primary slave is + better than the speed and duplex of the current active + slave. + + failure or 2 + + The primary slave becomes the active slave only if the + current active slave fails and the primary slave is up. + + The primary_reselect setting is ignored in two cases: + + If no slaves are active, the first slave to recover is + made the active slave. + + When initially enslaved, the primary slave is always made + the active slave. + + Changing the primary_reselect policy via sysfs will cause an + immediate selection of the best active slave according to the new + policy. This may or may not result in a change of the active + slave, depending upon the circumstances. + + This option was added for bonding version 3.6.0. + updelay Specifies the time, in milliseconds, to wait before enabling a diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index fbe427a6580..006b39dec87 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -164,6 +164,14 @@ tcp_congestion_control - STRING additional choices may be available based on kernel configuration. Default is set as part of kernel configuration. +tcp_cookie_size - INTEGER + Default size of TCP Cookie Transactions (TCPCT) option, that may be + overridden on a per socket basis by the TCPCT socket option. + Values greater than the maximum (16) are interpreted as the maximum. + Values greater than zero and less than the minimum (8) are interpreted + as the minimum. Odd values are interpreted as the next even value. + Default: 0 (off). + tcp_dsack - BOOLEAN Allows TCP to send "duplicate" SACKs. @@ -723,6 +731,12 @@ accept_source_route - BOOLEAN default TRUE (router) FALSE (host) +accept_local - BOOLEAN + Accept packets with local source addresses. In combination with + suitable routing, this can be used to direct packets between two + local interfaces over the wire and have them accepted properly. + default FALSE + rp_filter - INTEGER 0 - No source validation. 1 - Strict mode as defined in RFC3704 Strict Reverse Path @@ -738,8 +752,8 @@ rp_filter - INTEGER to prevent IP spoofing from DDos attacks. If using asymmetric routing or other complicated routing, then loose mode is recommended. - conf/all/rp_filter must also be set to non-zero to do source validation - on the interface + The max value from conf/{all,interface}/rp_filter is used + when doing source validation on the {interface}. Default value is 0. Note that some distributions enable it in startup scripts. @@ -1086,6 +1100,24 @@ accept_dad - INTEGER 2: Enable DAD, and disable IPv6 operation if MAC-based duplicate link-local address has been found. +force_tllao - BOOLEAN + Enable sending the target link-layer address option even when + responding to a unicast neighbor solicitation. + Default: FALSE + + Quoting from RFC 2461, section 4.4, Target link-layer address: + + "The option MUST be included for multicast solicitations in order to + avoid infinite Neighbor Solicitation "recursion" when the peer node + does not have a cache entry to return a Neighbor Advertisements + message. When responding to unicast solicitations, the option can be + omitted since the sender of the solicitation has the correct link- + layer address; otherwise it would not have be able to send the unicast + solicitation in the first place. However, including the link-layer + address in this case adds little overhead and eliminates a potential + race condition where the sender deletes the cached link-layer address + prior to receiving a response to a previous solicitation." + icmp/*: ratelimit - INTEGER Limit the maximal rates for sending ICMPv6 packets. diff --git a/Documentation/networking/pktgen.txt b/Documentation/networking/pktgen.txt index c6cf4a3c16e..61bb645d50e 100644 --- a/Documentation/networking/pktgen.txt +++ b/Documentation/networking/pktgen.txt @@ -90,6 +90,11 @@ Examples: pgset "dstmac 00:00:00:00:00:00" sets MAC destination address pgset "srcmac 00:00:00:00:00:00" sets MAC source address + pgset "queue_map_min 0" Sets the min value of tx queue interval + pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices + To select queue 1 of a given device, + use queue_map_min=1 and queue_map_max=1 + pgset "src_mac_count 1" Sets the number of MACs we'll range through. The 'minimum' MAC is what you set with srcmac. @@ -101,6 +106,9 @@ Examples: IPDST_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND MPLS_RND, VID_RND, SVID_RND + QUEUE_MAP_RND # queue map random + QUEUE_MAP_CPU # queue map mirrors smp_processor_id() + pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then cycle through the port range. diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt index b152e81da59..c10c022b911 100644 --- a/Documentation/oops-tracing.txt +++ b/Documentation/oops-tracing.txt @@ -257,6 +257,8 @@ characters, each representing a particular tainted value. 10: 'W' if a warning has previously been issued by the kernel. + 11: 'C' if a staging driver has been loaded. + The primary reason for the 'Tainted: ' string is to tell kernel debuggers if this is a clean kernel or if anything unusual has occurred. Tainting is permanent: even if an offending module is diff --git a/Documentation/pcmcia/driver-changes.txt b/Documentation/pcmcia/driver-changes.txt index 059934363ca..446f43b309d 100644 --- a/Documentation/pcmcia/driver-changes.txt +++ b/Documentation/pcmcia/driver-changes.txt @@ -1,5 +1,17 @@ This file details changes in 2.6 which affect PCMCIA card driver authors: +* no cs_error / CS_CHECK / CONFIG_PCMCIA_DEBUG (as of 2.6.33) + Instead of the cs_error() callback or the CS_CHECK() macro, please use + Linux-style checking of return values, and -- if necessary -- debug + messages using "dev_dbg()" or "pr_debug()". + +* New CIS tuple access (as of 2.6.33) + Instead of pcmcia_get_{first,next}_tuple(), pcmcia_get_tuple_data() and + pcmcia_parse_tuple(), a driver shall use "pcmcia_get_tuple()" if it is + only interested in one (raw) tuple, or "pcmcia_loop_tuple()" if it is + interested in all tuples of one type. To decode the MAC from CISTPL_FUNCE, + a new helper "pcmcia_get_mac_from_cis()" was added. + * New configuration loop helper (as of 2.6.28) By calling pcmcia_loop_config(), a driver can iterate over all available configuration options. During a driver's probe() phase, one doesn't need diff --git a/Documentation/power/regulator/consumer.txt b/Documentation/power/regulator/consumer.txt index 5f83fd24ea8..cdebb5145c2 100644 --- a/Documentation/power/regulator/consumer.txt +++ b/Documentation/power/regulator/consumer.txt @@ -104,7 +104,7 @@ to set the limit to 500mA when supplying power. Consumers can control their supply current limit by calling :- -int regulator_set_current_limit(regulator, min_uV, max_uV); +int regulator_set_current_limit(regulator, min_uA, max_uA); Where min_uA and max_uA are the minimum and maximum acceptable current limit in microamps. diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index f49a33b704d..4a3109b2884 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -38,7 +38,7 @@ struct dev_pm_ops { ... int (*runtime_suspend)(struct device *dev); int (*runtime_resume)(struct device *dev); - void (*runtime_idle)(struct device *dev); + int (*runtime_idle)(struct device *dev); ... }; @@ -71,9 +71,9 @@ what to do to handle the device). purpose). In particular, if the driver requires remote wakeup capability for proper -functioning and device_may_wakeup() returns 'false' for the device, then +functioning and device_run_wake() returns 'false' for the device, then ->runtime_suspend() should return -EBUSY. On the other hand, if -device_may_wakeup() returns 'true' for the device and the device is put +device_run_wake() returns 'true' for the device and the device is put into a low power state during the execution of its bus type's ->runtime_suspend(), it is expected that remote wake-up (i.e. hardware mechanism allowing the device to request a change of its power state, such as PCI PME) @@ -114,7 +114,8 @@ The action performed by a bus type's ->runtime_idle() callback is totally dependent on the bus type in question, but the expected and recommended action is to check if the device can be suspended (i.e. if all of the conditions necessary for suspending the device are satisfied) and to queue up a suspend -request for the device in that case. +request for the device in that case. The value returned by this callback is +ignored by the PM core. The helper functions provided by the PM core, described in Section 4, guarantee that the following constraints are met with respect to the bus type's run-time @@ -214,6 +215,9 @@ defined in include/linux/pm.h: being executed for that device and it is not practical to wait for the suspend to complete; means "start a resume as soon as you've suspended" + unsigned int run_wake; + - set if the device is capable of generating run-time wake-up events + enum rpm_status runtime_status; - the run-time PM status of the device; this field's initial value is RPM_SUSPENDED, which means that each device is initially regarded by the diff --git a/Documentation/powerpc/dts-bindings/fsl/mpc5200.txt b/Documentation/powerpc/dts-bindings/fsl/mpc5200.txt index 8447fd7090d..cabc780f725 100644 --- a/Documentation/powerpc/dts-bindings/fsl/mpc5200.txt +++ b/Documentation/powerpc/dts-bindings/fsl/mpc5200.txt @@ -178,3 +178,13 @@ External interrupts: external irq3: interrupts = <1 3 n>; 'n' is sense (0: level high, 1: edge rising, 2: edge falling 3: level low) +fsl,mpc5200-mscan nodes +----------------------- +In addition to the required compatible-, reg- and interrupt-properites, you can +also specify which clock source shall be used for the controller: + +- fsl,mscan-clock-source- a string describing the clock source. Valid values + are: "ip" for ip bus clock + "ref" for reference clock (XTAL) + "ref" is default in case this property is not + present. diff --git a/Documentation/powerpc/dts-bindings/xilinx.txt b/Documentation/powerpc/dts-bindings/xilinx.txt index 80339fe4300..ea68046bb9c 100644 --- a/Documentation/powerpc/dts-bindings/xilinx.txt +++ b/Documentation/powerpc/dts-bindings/xilinx.txt @@ -292,4 +292,15 @@ - reg-offset : A value of 3 is required - reg-shift : A value of 2 is required + vii) Xilinx USB Host controller + + The Xilinx USB host controller is EHCI compatible but with a different + base address for the EHCI registers, and it is always a big-endian + USB Host controller. The hardware can be configured as high speed only, + or high speed/full speed hybrid. + + Required properties: + - xlnx,support-usb-fs: A value 0 means the core is built as high speed + only. A value 1 means the core also supports + full speed devices. diff --git a/Documentation/scsi/ChangeLog.megaraid_sas b/Documentation/scsi/ChangeLog.megaraid_sas index c851ef49779..17ffa060771 100644 --- a/Documentation/scsi/ChangeLog.megaraid_sas +++ b/Documentation/scsi/ChangeLog.megaraid_sas @@ -1,3 +1,65 @@ +1 Release Date : Tues. July 28, 2009 10:12:45 PST 2009 - + (emaild-id:megaraidlinux@lsi.com) + Bo Yang + +2 Current Version : 00.00.04.12 +3 Older Version : 00.00.04.10 + +1. Change the AEN sys PD update from scsi_scan to + scsi_add_device and scsi_remove_device. +2. Takeoff the debug print-out in aen_polling routine. + +1 Release Date : Thur. July 02, 2009 10:12:45 PST 2009 - + (emaild-id:megaraidlinux@lsi.com) + Bo Yang + +2 Current Version : 00.00.04.10 +3 Older Version : 00.00.04.08 + +1. Add the 3 mins timeout during the controller initialize. +2. Add the fix for 64bit sense date errors. + +1 Release Date : Tues. May 05, 2009 10:12:45 PST 2009 - + (emaild-id:megaraidlinux@lsi.com) + Bo Yang + +2 Current Version : 00.00.04.08 +3 Older Version : 00.00.04.06 + +1. Add the fix of pending in FW after deleted the logic drives. +2. Add the fix of deallocating memory after get pdlist. + +1 Release Date : Tues. March 26, 2009 10:12:45 PST 2009 - + (emaild-id:megaraidlinux@lsi.com) + Bo Yang + +2 Current Version : 00.00.04.06 +3 Older Version : 00.00.04.04 + +1. Add the fix of the driver cmd empty fix of the driver cmd empty. +2. Add the fix of the driver MSM AEN CMD cause the system slow. + +1 Release Date : Tues. March 03, 2009 10:12:45 PST 2009 - + (emaild-id:megaraidlinux@lsi.com) + Bo Yang + +2 Current Version : 00.00.04.04 +3 Older Version : 00.00.04.01 + +1. Add the Tape drive fix to the driver: If the command is for + the tape device, set the pthru timeout to the os layer timeout value. + +2. Add Poll_wait mechanism to Gen-2 Linux driv. + In the aen handler, driver needs to wakeup poll handler similar to + the way it raises SIGIO. + +3. Add new controller new SAS2 support to the driver. + +4. Report the unconfigured PD (system PD) to OS. + +5. Add the IEEE SGL support to the driver + +6. Reasign the Application cmds to SAS2 controller 1 Release Date : Thur.July. 24 11:41:51 PST 2008 - (emaild-id:megaraidlinux@lsi.com) @@ -185,7 +247,7 @@ ii. FW enables WCE bit in Mode Sense cmd for drives that are configured Disks are exposed with WCE=1. User is advised to enable Write Back mode only when the controller has battery backup. At this time Synhronize cache is not supported by the FW. Driver will short-cycle - the cmd and return sucess without sending down to FW. + the cmd and return success without sending down to FW. 1 Release Date : Sun Jan. 14 11:21:32 PDT 2007 - Sumant Patro <Sumant.Patro@lsil.com>/Bo Yang diff --git a/Documentation/scsi/hptiop.txt b/Documentation/scsi/hptiop.txt index a6eb4add1be..9605179711f 100644 --- a/Documentation/scsi/hptiop.txt +++ b/Documentation/scsi/hptiop.txt @@ -3,6 +3,25 @@ HIGHPOINT ROCKETRAID 3xxx/4xxx ADAPTER DRIVER (hptiop) Controller Register Map ------------------------- +For RR44xx Intel IOP based adapters, the controller IOP is accessed via PCI BAR0 and BAR2: + + BAR0 offset Register + 0x11C5C Link Interface IRQ Set + 0x11C60 Link Interface IRQ Clear + + BAR2 offset Register + 0x10 Inbound Message Register 0 + 0x14 Inbound Message Register 1 + 0x18 Outbound Message Register 0 + 0x1C Outbound Message Register 1 + 0x20 Inbound Doorbell Register + 0x24 Inbound Interrupt Status Register + 0x28 Inbound Interrupt Mask Register + 0x30 Outbound Interrupt Status Register + 0x34 Outbound Interrupt Mask Register + 0x40 Inbound Queue Port + 0x44 Outbound Queue Port + For Intel IOP based adapters, the controller IOP is accessed via PCI BAR0: BAR0 offset Register @@ -93,7 +112,7 @@ The driver exposes following sysfs attributes: ----------------------------------------------------------------------------- -Copyright (C) 2006-2007 HighPoint Technologies, Inc. All Rights Reserved. +Copyright (C) 2006-2009 HighPoint Technologies, Inc. All Rights Reserved. This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of diff --git a/Documentation/serial/hayes-esp.txt b/Documentation/serial/hayes-esp.txt deleted file mode 100644 index 09b5d585675..00000000000 --- a/Documentation/serial/hayes-esp.txt +++ /dev/null @@ -1,154 +0,0 @@ -HAYES ESP DRIVER VERSION 2.1 - -A big thanks to the people at Hayes, especially Alan Adamson. Their support -has enabled me to provide enhancements to the driver. - -Please report your experiences with this driver to me (arobinso@nyx.net). I -am looking for both positive and negative feedback. - -*** IMPORTANT CHANGES FOR 2.1 *** -Support for PIO mode. Five situations will cause PIO mode to be used: -1) A multiport card is detected. PIO mode will always be used. (8 port cards -do not support DMA). -2) The DMA channel is set to an invalid value (anything other than 1 or 3). -3) The DMA buffer/channel could not be allocated. The port will revert to PIO -mode until it is reopened. -4) Less than a specified number of bytes need to be transferred to/from the -FIFOs. PIO mode will be used for that transfer only. -5) A port needs to do a DMA transfer and another port is already using the -DMA channel. PIO mode will be used for that transfer only. - -Since the Hayes ESP seems to conflict with other cards (notably sound cards) -when using DMA, DMA is turned off by default. To use DMA, it must be turned -on explicitly, either with the "dma=" option described below or with -setserial. A multiport card can be forced into DMA mode by using setserial; -however, most multiport cards don't support DMA. - -The latest version of setserial allows the enhanced configuration of the ESP -card to be viewed and modified. -*** - -This package contains the files needed to compile a module to support the Hayes -ESP card. The drivers are basically a modified version of the serial drivers. - -Features: - -- Uses the enhanced mode of the ESP card, allowing a wider range of - interrupts and features than compatibility mode -- Uses DMA and 16 bit PIO mode to transfer data to and from the ESP's FIFOs, - reducing CPU load -- Supports primary and secondary ports - - -If the driver is compiled as a module, the IRQs to use can be specified by -using the irq= option. The format is: - -irq=[0x100],[0x140],[0x180],[0x200],[0x240],[0x280],[0x300],[0x380] - -The address in brackets is the base address of the card. The IRQ of -nonexistent cards can be set to 0. If an IRQ of a card that does exist is set -to 0, the driver will attempt to guess at the correct IRQ. For example, to set -the IRQ of the card at address 0x300 to 12, the insmod command would be: - -insmod esp irq=0,0,0,0,0,0,12,0 - -The custom divisor can be set by using the divisor= option. The format is the -same as for the irq= option. Each divisor value is a series of hex digits, -with each digit representing the divisor to use for a corresponding port. The -divisor value is constructed RIGHT TO LEFT. Specifying a nonzero divisor value -will automatically set the spd_cust flag. To calculate the divisor to use for -a certain baud rate, divide the port's base baud (generally 921600) by the -desired rate. For example, to set the divisor of the primary port at 0x300 to -4 and the divisor of the secondary port at 0x308 to 8, the insmod command would -be: - -insmod esp divisor=0,0,0,0,0,0,0x84,0 - -The dma= option can be used to set the DMA channel. The channel can be either -1 or 3. Specifying any other value will force the driver to use PIO mode. -For example, to set the DMA channel to 3, the insmod command would be: - -insmod esp dma=3 - -The rx_trigger= and tx_trigger= options can be used to set the FIFO trigger -levels. They specify when the ESP card should send an interrupt. Larger -values will decrease the number of interrupts; however, a value too high may -result in data loss. Valid values are 1 through 1023, with 768 being the -default. For example, to set the receive trigger level to 512 bytes and the -transmit trigger level to 700 bytes, the insmod command would be: - -insmod esp rx_trigger=512 tx_trigger=700 - -The flow_off= and flow_on= options can be used to set the hardware flow off/ -flow on levels. The flow on level must be lower than the flow off level, and -the flow off level should be higher than rx_trigger. Valid values are 1 -through 1023, with 1016 being the default flow off level and 944 being the -default flow on level. For example, to set the flow off level to 1000 bytes -and the flow on level to 935 bytes, the insmod command would be: - -insmod esp flow_off=1000 flow_on=935 - -The rx_timeout= option can be used to set the receive timeout value. This -value indicates how long after receiving the last character that the ESP card -should wait before signalling an interrupt. Valid values are 0 though 255, -with 128 being the default. A value too high will increase latency, and a -value too low will cause unnecessary interrupts. For example, to set the -receive timeout to 255, the insmod command would be: - -insmod esp rx_timeout=255 - -The pio_threshold= option sets the threshold (in number of characters) for -using PIO mode instead of DMA mode. For example, if this value is 32, -transfers of 32 bytes or less will always use PIO mode. - -insmod esp pio_threshold=32 - -Multiple options can be listed on the insmod command line by separating each -option with a space. For example: - -insmod esp dma=3 trigger=512 - -The esp module can be automatically loaded when needed. To cause this to -happen, add the following lines to /etc/modprobe.conf (replacing the last line -with options for your configuration): - -alias char-major-57 esp -alias char-major-58 esp -options esp irq=0,0,0,0,0,0,3,0 divisor=0,0,0,0,0,0,0x4,0 - -You may also need to run 'depmod -a'. - -Devices must be created manually. To create the devices, note the output from -the module after it is inserted. The output will appear in the location where -kernel messages usually appear (usually /var/adm/messages). Create two devices -for each 'tty' mentioned, one with major of 57 and the other with major of 58. -The minor number should be the same as the tty number reported. The commands -would be (replace ? with the tty number): - -mknod /dev/ttyP? c 57 ? -mknod /dev/cup? c 58 ? - -For example, if the following line appears: - -Oct 24 18:17:23 techno kernel: ttyP8 at 0x0140 (irq = 3) is an ESP primary port - -...two devices should be created: - -mknod /dev/ttyP8 c 57 8 -mknod /dev/cup8 c 58 8 - -You may need to set the permissions on the devices: - -chmod 666 /dev/ttyP* -chmod 666 /dev/cup* - -The ESP module and the serial module should not conflict (they can be used at -the same time). After the ESP module has been loaded the ports on the ESP card -will no longer be accessible by the serial driver. - -If I/O errors are experienced when accessing the port, check for IRQ and DMA -conflicts ('cat /proc/interrupts' and 'cat /proc/dma' for a list of IRQs and -DMAs currently in use). - -Enjoy! -Andrew J. Robinson <arobinso@nyx.net> diff --git a/Documentation/serial/tty.txt b/Documentation/serial/tty.txt index 8e65c4498c5..5e5349a4fcd 100644 --- a/Documentation/serial/tty.txt +++ b/Documentation/serial/tty.txt @@ -42,7 +42,8 @@ TTY side interfaces: open() - Called when the line discipline is attached to the terminal. No other call into the line discipline for this tty will occur until it - completes successfully. Can sleep. + completes successfully. Returning an error will + prevent the ldisc from being attached. Can sleep. close() - This is called on a terminal when the line discipline is being unplugged. At the point of @@ -52,7 +53,7 @@ close() - This is called on a terminal when the line hangup() - Called when the tty line is hung up. The line discipline should cease I/O to the tty. No further calls into the ldisc code will occur. - Can sleep. + The return value is ignored. Can sleep. write() - A process is writing data through the line discipline. Multiple write calls are serialized @@ -83,6 +84,10 @@ ioctl() - Called when an ioctl is handed to the tty layer that might be for the ldisc. Multiple ioctl calls may occur in parallel. May sleep. +compat_ioctl() - Called when a 32 bit ioctl is handed to the tty layer + that might be for the ldisc. Multiple ioctl calls + may occur in parallel. May sleep. + Driver Side Interfaces: receive_buf() - Hand buffers of bytes from the driver to the ldisc diff --git a/Documentation/slow-work.txt b/Documentation/slow-work.txt index ebc50f808ea..9dbf4470c7e 100644 --- a/Documentation/slow-work.txt +++ b/Documentation/slow-work.txt @@ -41,6 +41,13 @@ expand files, provided the time taken to do so isn't too long. Operations of both types may sleep during execution, thus tying up the thread loaned to it. +A further class of work item is available, based on the slow work item class: + + (*) Delayed slow work items. + +These are slow work items that have a timer to defer queueing of the item for +a while. + THREAD-TO-CLASS ALLOCATION -------------------------- @@ -64,9 +71,11 @@ USING SLOW WORK ITEMS Firstly, a module or subsystem wanting to make use of slow work items must register its interest: - int ret = slow_work_register_user(); + int ret = slow_work_register_user(struct module *module); -This will return 0 if successful, or a -ve error upon failure. +This will return 0 if successful, or a -ve error upon failure. The module +pointer should be the module interested in using this facility (almost +certainly THIS_MODULE). Slow work items may then be set up by: @@ -93,6 +102,10 @@ Slow work items may then be set up by: or: + delayed_slow_work_init(&myitem, &myitem_ops); + + or: + vslow_work_init(&myitem, &myitem_ops); depending on its class. @@ -102,15 +115,92 @@ A suitably set up work item can then be enqueued for processing: int ret = slow_work_enqueue(&myitem); This will return a -ve error if the thread pool is unable to gain a reference -on the item, 0 otherwise. +on the item, 0 otherwise, or (for delayed work): + + int ret = delayed_slow_work_enqueue(&myitem, my_jiffy_delay); The items are reference counted, so there ought to be no need for a flush -operation. When all a module's slow work items have been processed, and the +operation. But as the reference counting is optional, means to cancel +existing work items are also included: + + cancel_slow_work(&myitem); + cancel_delayed_slow_work(&myitem); + +can be used to cancel pending work. The above cancel function waits for +existing work to have been executed (or prevent execution of them, depending +on timing). + + +When all a module's slow work items have been processed, and the module has no further interest in the facility, it should unregister its interest: - slow_work_unregister_user(); + slow_work_unregister_user(struct module *module); + +The module pointer is used to wait for all outstanding work items for that +module before completing the unregistration. This prevents the put_ref() code +from being taken away before it completes. module should almost certainly be +THIS_MODULE. + + +================ +HELPER FUNCTIONS +================ + +The slow-work facility provides a function by which it can be determined +whether or not an item is queued for later execution: + + bool queued = slow_work_is_queued(struct slow_work *work); + +If it returns false, then the item is not on the queue (it may be executing +with a requeue pending). This can be used to work out whether an item on which +another depends is on the queue, thus allowing a dependent item to be queued +after it. + +If the above shows an item on which another depends not to be queued, then the +owner of the dependent item might need to wait. However, to avoid locking up +the threads unnecessarily be sleeping in them, it can make sense under some +circumstances to return the work item to the queue, thus deferring it until +some other items have had a chance to make use of the yielded thread. + +To yield a thread and defer an item, the work function should simply enqueue +the work item again and return. However, this doesn't work if there's nothing +actually on the queue, as the thread just vacated will jump straight back into +the item's work function, thus busy waiting on a CPU. + +Instead, the item should use the thread to wait for the dependency to go away, +but rather than using schedule() or schedule_timeout() to sleep, it should use +the following function: + + bool requeue = slow_work_sleep_till_thread_needed( + struct slow_work *work, + signed long *_timeout); + +This will add a second wait and then sleep, such that it will be woken up if +either something appears on the queue that could usefully make use of the +thread - and behind which this item can be queued, or if the event the caller +set up to wait for happens. True will be returned if something else appeared +on the queue and this work function should perhaps return, of false if +something else woke it up. The timeout is as for schedule_timeout(). + +For example: + + wq = bit_waitqueue(&my_flags, MY_BIT); + init_wait(&wait); + requeue = false; + do { + prepare_to_wait(wq, &wait, TASK_UNINTERRUPTIBLE); + if (!test_bit(MY_BIT, &my_flags)) + break; + requeue = slow_work_sleep_till_thread_needed(&my_work, + &timeout); + } while (timeout > 0 && !requeue); + finish_wait(wq, &wait); + if (!test_bit(MY_BIT, &my_flags) + goto do_my_thing; + if (requeue) + return; // to slow_work =============== @@ -118,7 +208,8 @@ ITEM OPERATIONS =============== Each work item requires a table of operations of type struct slow_work_ops. -All members are required: +Only ->execute() is required; the getting and putting of a reference and the +describing of an item are all optional. (*) Get a reference on an item: @@ -148,6 +239,16 @@ All members are required: This should perform the work required of the item. It may sleep, it may perform disk I/O and it may wait for locks. + (*) View an item through /proc: + + void (*desc)(struct slow_work *work, struct seq_file *m); + + If supplied, this should print to 'm' a small string describing the work + the item is to do. This should be no more than about 40 characters, and + shouldn't include a newline character. + + See the 'Viewing executing and queued items' section below. + ================== POOL CONFIGURATION @@ -172,3 +273,50 @@ The slow-work thread pool has a number of configurables: is bounded to between 1 and one fewer than the number of active threads. This ensures there is always at least one thread that can process very slow work items, and always at least one thread that won't. + + +================================== +VIEWING EXECUTING AND QUEUED ITEMS +================================== + +If CONFIG_SLOW_WORK_DEBUG is enabled, a debugfs file is made available: + + /sys/kernel/debug/slow_work/runqueue + +through which the list of work items being executed and the queues of items to +be executed may be viewed. The owner of a work item is given the chance to +add some information of its own. + +The contents look something like the following: + + THR PID ITEM ADDR FL MARK DESC + === ===== ================ == ===== ========== + 0 3005 ffff880023f52348 a 952ms FSC: OBJ17d3: LOOK + 1 3006 ffff880024e33668 2 160ms FSC: OBJ17e5 OP60d3b: Write1/Store fl=2 + 2 3165 ffff8800296dd180 a 424ms FSC: OBJ17e4: LOOK + 3 4089 ffff8800262c8d78 a 212ms FSC: OBJ17ea: CRTN + 4 4090 ffff88002792bed8 2 388ms FSC: OBJ17e8 OP60d36: Write1/Store fl=2 + 5 4092 ffff88002a0ef308 2 388ms FSC: OBJ17e7 OP60d2e: Write1/Store fl=2 + 6 4094 ffff88002abaf4b8 2 132ms FSC: OBJ17e2 OP60d4e: Write1/Store fl=2 + 7 4095 ffff88002bb188e0 a 388ms FSC: OBJ17e9: CRTN + vsq - ffff880023d99668 1 308ms FSC: OBJ17e0 OP60f91: Write1/EnQ fl=2 + vsq - ffff8800295d1740 1 212ms FSC: OBJ16be OP4d4b6: Write1/EnQ fl=2 + vsq - ffff880025ba3308 1 160ms FSC: OBJ179a OP58dec: Write1/EnQ fl=2 + vsq - ffff880024ec83e0 1 160ms FSC: OBJ17ae OP599f2: Write1/EnQ fl=2 + vsq - ffff880026618e00 1 160ms FSC: OBJ17e6 OP60d33: Write1/EnQ fl=2 + vsq - ffff880025a2a4b8 1 132ms FSC: OBJ16a2 OP4d583: Write1/EnQ fl=2 + vsq - ffff880023cbe6d8 9 212ms FSC: OBJ17eb: LOOK + vsq - ffff880024d37590 9 212ms FSC: OBJ17ec: LOOK + vsq - ffff880027746cb0 9 212ms FSC: OBJ17ed: LOOK + vsq - ffff880024d37ae8 9 212ms FSC: OBJ17ee: LOOK + vsq - ffff880024d37cb0 9 212ms FSC: OBJ17ef: LOOK + vsq - ffff880025036550 9 212ms FSC: OBJ17f0: LOOK + vsq - ffff8800250368e0 9 212ms FSC: OBJ17f1: LOOK + vsq - ffff880025036aa8 9 212ms FSC: OBJ17f2: LOOK + +In the 'THR' column, executing items show the thread they're occupying and +queued threads indicate which queue they're on. 'PID' shows the process ID of +a slow-work thread that's executing something. 'FL' shows the work item flags. +'MARK' indicates how long since an item was queued or began executing. Lastly, +the 'DESC' column permits the owner of an item to give some information. + diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index 1c8eb4518ce..8923597bd2b 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -522,7 +522,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. pcm_devs - Number of PCM devices assigned to each card (default = 1, up to 4) pcm_substreams - Number of PCM substreams assigned to each PCM - (default = 8, up to 16) + (default = 8, up to 128) hrtimer - Use hrtimer (=1, default) or system timer (=0) fake_buffer - Fake buffer allocations (default = 1) @@ -798,6 +798,9 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. setup before initializing the codecs. This option is available only when CONFIG_SND_HDA_PATCH_LOADER=y is set. See HD-Audio.txt for details. + beep_mode - Selects the beep registration mode (0=off, 1=on, 2= + dynamic registration via mute switch on/off); the default + value is set via CONFIG_SND_HDA_INPUT_BEEP_MODE kconfig. [Single (global) options] single_cmd - Use single immediate commands to communicate with @@ -1454,6 +1457,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. Module for internal PC-Speaker. + nopcm - Disable PC-Speaker PCM sound. Only beeps remain. nforce_wa - enable NForce chipset workaround. Expect bad sound. This module supports system beeps, some kind of PCM playback and @@ -1631,7 +1635,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. Module snd-sscape ----------------- - Module for ENSONIQ SoundScape PnP cards. + Module for ENSONIQ SoundScape cards. port - Port # (PnP setup) wss_port - WSS Port # (PnP setup) @@ -1639,10 +1643,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. mpu_irq - MPU-401 IRQ # (PnP setup) dma - DMA # (PnP setup) dma2 - 2nd DMA # (PnP setup, -1 to disable) + joystick - Enable gameport - 0 = disable (default), 1 = enable + + This module supports multiple cards. - This module supports multiple cards. ISA PnP must be enabled. - You need sscape_ctl tool in alsa-tools package for loading - the microcode. + The driver requires the firmware loader support on kernel. Module snd-sun-amd7930 (on sparc only) -------------------------------------- diff --git a/Documentation/sound/alsa/ControlNames.txt b/Documentation/sound/alsa/ControlNames.txt index 5b18298e949..fea65bb6269 100644 --- a/Documentation/sound/alsa/ControlNames.txt +++ b/Documentation/sound/alsa/ControlNames.txt @@ -18,8 +18,9 @@ SOURCE: Master Master Mono Hardware Master + Speaker (internal speaker) Headphone - PC Speaker + Beep (beep generator) Phone Phone Input Phone Output diff --git a/Documentation/sound/alsa/HD-Audio-Models.txt b/Documentation/sound/alsa/HD-Audio-Models.txt index 75fddb40f41..e93affff3af 100644 --- a/Documentation/sound/alsa/HD-Audio-Models.txt +++ b/Documentation/sound/alsa/HD-Audio-Models.txt @@ -126,6 +126,7 @@ ALC882/883/885/888/889 mb5 Macbook 5,1 mbp3 Macbook Pro rev3 imac24 iMac 24'' with jack detection + imac91 iMac 9,1 w2jc ASUS W2JC 3stack-2ch-dig 3-jack with SPDIF I/O (ALC883) alc883-6stack-dig 6-jack digital with SPDIF I/O (ALC883) @@ -359,6 +360,7 @@ STAC9227/9228/9229/927x 5stack-no-fp D965 5stack without front panel dell-3stack Dell Dimension E520 dell-bios Fixes with Dell BIOS setup + volknob Fixes with volume-knob widget 0x24 auto BIOS setup (default) STAC92HD71B* @@ -390,6 +392,7 @@ STAC92HD83* ref Reference board mic-ref Reference board with power management for ports dell-s14 Dell laptop + hp HP laptops with (inverted) mute-LED auto BIOS setup (default) STAC9872 diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt index 7b8a5f947d1..6325bec06a7 100644 --- a/Documentation/sound/alsa/HD-Audio.txt +++ b/Documentation/sound/alsa/HD-Audio.txt @@ -624,11 +624,13 @@ hda-verb. The program gives you an easy-to-use GUI stuff for showing the widget information and adjusting the amp values, as well as the proc-compatible output. -The hda-analyzer is a part of alsa.git repository in -alsa-project.org: +The hda-analyzer: - http://git.alsa-project.org/?p=alsa.git;a=tree;f=hda-analyzer +is a part of alsa.git repository in alsa-project.org: + +- git://git.alsa-project.org/alsa.git Codecgraph ~~~~~~~~~~ diff --git a/Documentation/spi/spi-summary b/Documentation/spi/spi-summary index deab51ddc33..4884cb33845 100644 --- a/Documentation/spi/spi-summary +++ b/Documentation/spi/spi-summary @@ -538,7 +538,7 @@ SPI MESSAGE QUEUE The bulk of the driver will be managing the I/O queue fed by transfer(). That queue could be purely conceptual. For example, a driver used only -for low-frequency sensor acess might be fine using synchronous PIO. +for low-frequency sensor access might be fine using synchronous PIO. But the queue will probably be very real, using message->queue, PIO, often DMA (especially if the root filesystem is in SPI flash), and diff --git a/Documentation/sysctl/ctl_unnumbered.txt b/Documentation/sysctl/ctl_unnumbered.txt deleted file mode 100644 index 23003a8ea3e..00000000000 --- a/Documentation/sysctl/ctl_unnumbered.txt +++ /dev/null @@ -1,22 +0,0 @@ - -Except for a few extremely rare exceptions user space applications do not use -the binary sysctl interface. Instead everyone uses /proc/sys/... with -readable ascii names. - -Recently the kernel has started supporting setting the binary sysctl value to -CTL_UNNUMBERED so we no longer need to assign a binary sysctl path to allow -sysctls to show up in /proc/sys. - -Assigning binary sysctl numbers is an endless source of conflicts in sysctl.h, -breaking of the user space ABI (because of those conflicts), and maintenance -problems. A complete pass through all of the sysctl users revealed multiple -instances where the sysctl binary interface was broken and had gone undetected -for years. - -So please do not add new binary sysctl numbers. They are unneeded and -problematic. - -If you really need a new binary sysctl number please first merge your sysctl -into the kernel and then as a separate patch allocate a binary sysctl number. - -(ebiederm@xmission.com, June 2007) diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index a028b92001e..8f7a0e73ef4 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -139,9 +139,9 @@ core_pattern is used to specify a core dumpfile pattern name. core_pipe_limit: This sysctl is only applicable when core_pattern is configured to pipe core -files to user space helper a (when the first character of core_pattern is a '|', +files to a user space helper (when the first character of core_pattern is a '|', see above). When collecting cores via a pipe to an application, it is -occasionally usefull for the collecting application to gather data about the +occasionally useful for the collecting application to gather data about the crashing process from its /proc/pid directory. In order to do this safely, the kernel must wait for the collecting process to exit, so as not to remove the crashing processes proc files prematurely. This in turn creates the possibility @@ -152,7 +152,7 @@ applications in parallel. If this value is exceeded, then those crashing processes above that value are noted via the kernel log and their cores are skipped. 0 is a special value, indicating that unlimited processes may be captured in parallel, but that no waiting will take place (i.e. the collecting -process is not guaranteed access to /proc/<crahing pid>/). This value defaults +process is not guaranteed access to /proc/<crashing pid>/). This value defaults to 0. ============================================================== diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt index a6e360d2055..fc5790d36cd 100644 --- a/Documentation/sysctl/vm.txt +++ b/Documentation/sysctl/vm.txt @@ -370,7 +370,7 @@ The default is 1 percent. mmap_min_addr This file indicates the amount of address space which a user process will -be restricted from mmaping. Since kernel null dereference bugs could +be restricted from mmapping. Since kernel null dereference bugs could accidentally operate based on the information in the first couple of pages of memory userspace processes should not be allowed to write to them. By default this value is set to 0 and no protections will be enforced by the diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index 70d68ce8640..a87dc277a5c 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -1,5 +1,5 @@ Generic Thermal Sysfs driver How To -========================= +=================================== Written by Sujith Thomas <sujith.thomas@intel.com>, Zhang Rui <rui.zhang@intel.com> @@ -10,20 +10,20 @@ Copyright (c) 2008 Intel Corporation 0. Introduction -The generic thermal sysfs provides a set of interfaces for thermal zone devices (sensors) -and thermal cooling devices (fan, processor...) to register with the thermal management -solution and to be a part of it. +The generic thermal sysfs provides a set of interfaces for thermal zone +devices (sensors) and thermal cooling devices (fan, processor...) to register +with the thermal management solution and to be a part of it. -This how-to focuses on enabling new thermal zone and cooling devices to participate -in thermal management. -This solution is platform independent and any type of thermal zone devices and -cooling devices should be able to make use of the infrastructure. +This how-to focuses on enabling new thermal zone and cooling devices to +participate in thermal management. +This solution is platform independent and any type of thermal zone devices +and cooling devices should be able to make use of the infrastructure. -The main task of the thermal sysfs driver is to expose thermal zone attributes as well -as cooling device attributes to the user space. -An intelligent thermal management application can make decisions based on inputs -from thermal zone attributes (the current temperature and trip point temperature) -and throttle appropriate devices. +The main task of the thermal sysfs driver is to expose thermal zone attributes +as well as cooling device attributes to the user space. +An intelligent thermal management application can make decisions based on +inputs from thermal zone attributes (the current temperature and trip point +temperature) and throttle appropriate devices. [0-*] denotes any positive number starting from 0 [1-*] denotes any positive number starting from 1 @@ -31,77 +31,77 @@ and throttle appropriate devices. 1. thermal sysfs driver interface functions 1.1 thermal zone device interface -1.1.1 struct thermal_zone_device *thermal_zone_device_register(char *name, int trips, - void *devdata, struct thermal_zone_device_ops *ops) - - This interface function adds a new thermal zone device (sensor) to - /sys/class/thermal folder as thermal_zone[0-*]. - It tries to bind all the thermal cooling devices registered at the same time. - - name: the thermal zone name. - trips: the total number of trip points this thermal zone supports. - devdata: device private data - ops: thermal zone device call-backs. - .bind: bind the thermal zone device with a thermal cooling device. - .unbind: unbind the thermal zone device with a thermal cooling device. - .get_temp: get the current temperature of the thermal zone. - .get_mode: get the current mode (user/kernel) of the thermal zone. - "kernel" means thermal management is done in kernel. - "user" will prevent kernel thermal driver actions upon trip points - so that user applications can take charge of thermal management. - .set_mode: set the mode (user/kernel) of the thermal zone. - .get_trip_type: get the type of certain trip point. - .get_trip_temp: get the temperature above which the certain trip point - will be fired. +1.1.1 struct thermal_zone_device *thermal_zone_device_register(char *name, + int trips, void *devdata, struct thermal_zone_device_ops *ops) + + This interface function adds a new thermal zone device (sensor) to + /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the + thermal cooling devices registered at the same time. + + name: the thermal zone name. + trips: the total number of trip points this thermal zone supports. + devdata: device private data + ops: thermal zone device call-backs. + .bind: bind the thermal zone device with a thermal cooling device. + .unbind: unbind the thermal zone device with a thermal cooling device. + .get_temp: get the current temperature of the thermal zone. + .get_mode: get the current mode (user/kernel) of the thermal zone. + - "kernel" means thermal management is done in kernel. + - "user" will prevent kernel thermal driver actions upon trip points + so that user applications can take charge of thermal management. + .set_mode: set the mode (user/kernel) of the thermal zone. + .get_trip_type: get the type of certain trip point. + .get_trip_temp: get the temperature above which the certain trip point + will be fired. 1.1.2 void thermal_zone_device_unregister(struct thermal_zone_device *tz) - This interface function removes the thermal zone device. - It deletes the corresponding entry form /sys/class/thermal folder and unbind all - the thermal cooling devices it uses. + This interface function removes the thermal zone device. + It deletes the corresponding entry form /sys/class/thermal folder and + unbind all the thermal cooling devices it uses. 1.2 thermal cooling device interface 1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name, - void *devdata, struct thermal_cooling_device_ops *) - - This interface function adds a new thermal cooling device (fan/processor/...) to - /sys/class/thermal/ folder as cooling_device[0-*]. - It tries to bind itself to all the thermal zone devices register at the same time. - name: the cooling device name. - devdata: device private data. - ops: thermal cooling devices call-backs. - .get_max_state: get the Maximum throttle state of the cooling device. - .get_cur_state: get the Current throttle state of the cooling device. - .set_cur_state: set the Current throttle state of the cooling device. + void *devdata, struct thermal_cooling_device_ops *) + + This interface function adds a new thermal cooling device (fan/processor/...) + to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself + to all the thermal zone devices register at the same time. + name: the cooling device name. + devdata: device private data. + ops: thermal cooling devices call-backs. + .get_max_state: get the Maximum throttle state of the cooling device. + .get_cur_state: get the Current throttle state of the cooling device. + .set_cur_state: set the Current throttle state of the cooling device. 1.2.2 void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) - This interface function remove the thermal cooling device. - It deletes the corresponding entry form /sys/class/thermal folder and unbind - itself from all the thermal zone devices using it. + This interface function remove the thermal cooling device. + It deletes the corresponding entry form /sys/class/thermal folder and + unbind itself from all the thermal zone devices using it. 1.3 interface for binding a thermal zone device with a thermal cooling device 1.3.1 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, - int trip, struct thermal_cooling_device *cdev); + int trip, struct thermal_cooling_device *cdev); - This interface function bind a thermal cooling device to the certain trip point - of a thermal zone device. - This function is usually called in the thermal zone device .bind callback. - tz: the thermal zone device - cdev: thermal cooling device - trip: indicates which trip point the cooling devices is associated with - in this thermal zone. + This interface function bind a thermal cooling device to the certain trip + point of a thermal zone device. + This function is usually called in the thermal zone device .bind callback. + tz: the thermal zone device + cdev: thermal cooling device + trip: indicates which trip point the cooling devices is associated with + in this thermal zone. 1.3.2 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, - int trip, struct thermal_cooling_device *cdev); + int trip, struct thermal_cooling_device *cdev); - This interface function unbind a thermal cooling device from the certain trip point - of a thermal zone device. - This function is usually called in the thermal zone device .unbind callback. - tz: the thermal zone device - cdev: thermal cooling device - trip: indicates which trip point the cooling devices is associated with - in this thermal zone. + This interface function unbind a thermal cooling device from the certain + trip point of a thermal zone device. This function is usually called in + the thermal zone device .unbind callback. + tz: the thermal zone device + cdev: thermal cooling device + trip: indicates which trip point the cooling devices is associated with + in this thermal zone. 2. sysfs attributes structure @@ -114,153 +114,166 @@ if hwmon is compiled in or built as a module. Thermal zone device sys I/F, created once it's registered: /sys/class/thermal/thermal_zone[0-*]: - |-----type: Type of the thermal zone - |-----temp: Current temperature - |-----mode: Working mode of the thermal zone - |-----trip_point_[0-*]_temp: Trip point temperature - |-----trip_point_[0-*]_type: Trip point type + |---type: Type of the thermal zone + |---temp: Current temperature + |---mode: Working mode of the thermal zone + |---trip_point_[0-*]_temp: Trip point temperature + |---trip_point_[0-*]_type: Trip point type Thermal cooling device sys I/F, created once it's registered: /sys/class/thermal/cooling_device[0-*]: - |-----type : Type of the cooling device(processor/fan/...) - |-----max_state: Maximum cooling state of the cooling device - |-----cur_state: Current cooling state of the cooling device + |---type: Type of the cooling device(processor/fan/...) + |---max_state: Maximum cooling state of the cooling device + |---cur_state: Current cooling state of the cooling device -These two dynamic attributes are created/removed in pairs. -They represent the relationship between a thermal zone and its associated cooling device. -They are created/removed for each -thermal_zone_bind_cooling_device/thermal_zone_unbind_cooling_device successful execution. +Then next two dynamic attributes are created/removed in pairs. They represent +the relationship between a thermal zone and its associated cooling device. +They are created/removed for each successful execution of +thermal_zone_bind_cooling_device/thermal_zone_unbind_cooling_device. -/sys/class/thermal/thermal_zone[0-*] - |-----cdev[0-*]: The [0-*]th cooling device in the current thermal zone - |-----cdev[0-*]_trip_point: Trip point that cdev[0-*] is associated with +/sys/class/thermal/thermal_zone[0-*]: + |---cdev[0-*]: [0-*]th cooling device in current thermal zone + |---cdev[0-*]_trip_point: Trip point that cdev[0-*] is associated with Besides the thermal zone device sysfs I/F and cooling device sysfs I/F, -the generic thermal driver also creates a hwmon sysfs I/F for each _type_ of -thermal zone device. E.g. the generic thermal driver registers one hwmon class device -and build the associated hwmon sysfs I/F for all the registered ACPI thermal zones. +the generic thermal driver also creates a hwmon sysfs I/F for each _type_ +of thermal zone device. E.g. the generic thermal driver registers one hwmon +class device and build the associated hwmon sysfs I/F for all the registered +ACPI thermal zones. + /sys/class/hwmon/hwmon[0-*]: - |-----name: The type of the thermal zone devices. - |-----temp[1-*]_input: The current temperature of thermal zone [1-*]. - |-----temp[1-*]_critical: The critical trip point of thermal zone [1-*]. + |---name: The type of the thermal zone devices + |---temp[1-*]_input: The current temperature of thermal zone [1-*] + |---temp[1-*]_critical: The critical trip point of thermal zone [1-*] + Please read Documentation/hwmon/sysfs-interface for additional information. *************************** * Thermal zone attributes * *************************** -type Strings which represent the thermal zone type. - This is given by thermal zone driver as part of registration. - Eg: "acpitz" indicates it's an ACPI thermal device. - In order to keep it consistent with hwmon sys attribute, - this should be a short, lowercase string, - not containing spaces nor dashes. - RO - Required - -temp Current temperature as reported by thermal zone (sensor) - Unit: millidegree Celsius - RO - Required - -mode One of the predefined values in [kernel, user] - This file gives information about the algorithm - that is currently managing the thermal zone. - It can be either default kernel based algorithm - or user space application. - RW - Optional - kernel = Thermal management in kernel thermal zone driver. - user = Preventing kernel thermal zone driver actions upon - trip points so that user application can take full - charge of the thermal management. - -trip_point_[0-*]_temp The temperature above which trip point will be fired - Unit: millidegree Celsius - RO - Optional - -trip_point_[0-*]_type Strings which indicate the type of the trip point - E.g. it can be one of critical, hot, passive, - active[0-*] for ACPI thermal zone. - RO - Optional - -cdev[0-*] Sysfs link to the thermal cooling device node where the sys I/F - for cooling device throttling control represents. - RO - Optional - -cdev[0-*]_trip_point The trip point with which cdev[0-*] is associated in this thermal zone - -1 means the cooling device is not associated with any trip point. - RO - Optional - -****************************** -* Cooling device attributes * -****************************** - -type String which represents the type of device - eg: For generic ACPI: this should be "Fan", - "Processor" or "LCD" - eg. For memory controller device on intel_menlow platform: - this should be "Memory controller" - RO - Required - -max_state The maximum permissible cooling state of this cooling device. - RO - Required - -cur_state The current cooling state of this cooling device. - the value can any integer numbers between 0 and max_state, - cur_state == 0 means no cooling - cur_state == max_state means the maximum cooling. - RW - Required +type + Strings which represent the thermal zone type. + This is given by thermal zone driver as part of registration. + E.g: "acpitz" indicates it's an ACPI thermal device. + In order to keep it consistent with hwmon sys attribute; this should + be a short, lowercase string, not containing spaces nor dashes. + RO, Required + +temp + Current temperature as reported by thermal zone (sensor). + Unit: millidegree Celsius + RO, Required + +mode + One of the predefined values in [kernel, user]. + This file gives information about the algorithm that is currently + managing the thermal zone. It can be either default kernel based + algorithm or user space application. + kernel = Thermal management in kernel thermal zone driver. + user = Preventing kernel thermal zone driver actions upon + trip points so that user application can take full + charge of the thermal management. + RW, Optional + +trip_point_[0-*]_temp + The temperature above which trip point will be fired. + Unit: millidegree Celsius + RO, Optional + +trip_point_[0-*]_type + Strings which indicate the type of the trip point. + E.g. it can be one of critical, hot, passive, active[0-*] for ACPI + thermal zone. + RO, Optional + +cdev[0-*] + Sysfs link to the thermal cooling device node where the sys I/F + for cooling device throttling control represents. + RO, Optional + +cdev[0-*]_trip_point + The trip point with which cdev[0-*] is associated in this thermal + zone; -1 means the cooling device is not associated with any trip + point. + RO, Optional + +passive + Attribute is only present for zones in which the passive cooling + policy is not supported by native thermal driver. Default is zero + and can be set to a temperature (in millidegrees) to enable a + passive trip point for the zone. Activation is done by polling with + an interval of 1 second. + Unit: millidegrees Celsius + RW, Optional + +***************************** +* Cooling device attributes * +***************************** + +type + String which represents the type of device, e.g: + - for generic ACPI: should be "Fan", "Processor" or "LCD" + - for memory controller device on intel_menlow platform: + should be "Memory controller". + RO, Required + +max_state + The maximum permissible cooling state of this cooling device. + RO, Required + +cur_state + The current cooling state of this cooling device. + The value can any integer numbers between 0 and max_state: + - cur_state == 0 means no cooling + - cur_state == max_state means the maximum cooling. + RW, Required 3. A simple implementation -ACPI thermal zone may support multiple trip points like critical/hot/passive/active. -If an ACPI thermal zone supports critical, passive, active[0] and active[1] at the same time, -it may register itself as a thermal_zone_device (thermal_zone1) with 4 trip points in all. -It has one processor and one fan, which are both registered as thermal_cooling_device. -If the processor is listed in _PSL method, and the fan is listed in _AL0 method, -the sys I/F structure will be built like this: +ACPI thermal zone may support multiple trip points like critical, hot, +passive, active. If an ACPI thermal zone supports critical, passive, +active[0] and active[1] at the same time, it may register itself as a +thermal_zone_device (thermal_zone1) with 4 trip points in all. +It has one processor and one fan, which are both registered as +thermal_cooling_device. + +If the processor is listed in _PSL method, and the fan is listed in _AL0 +method, the sys I/F structure will be built like this: /sys/class/thermal: |thermal_zone1: - |-----type: acpitz - |-----temp: 37000 - |-----mode: kernel - |-----trip_point_0_temp: 100000 - |-----trip_point_0_type: critical - |-----trip_point_1_temp: 80000 - |-----trip_point_1_type: passive - |-----trip_point_2_temp: 70000 - |-----trip_point_2_type: active0 - |-----trip_point_3_temp: 60000 - |-----trip_point_3_type: active1 - |-----cdev0: --->/sys/class/thermal/cooling_device0 - |-----cdev0_trip_point: 1 /* cdev0 can be used for passive */ - |-----cdev1: --->/sys/class/thermal/cooling_device3 - |-----cdev1_trip_point: 2 /* cdev1 can be used for active[0]*/ + |---type: acpitz + |---temp: 37000 + |---mode: kernel + |---trip_point_0_temp: 100000 + |---trip_point_0_type: critical + |---trip_point_1_temp: 80000 + |---trip_point_1_type: passive + |---trip_point_2_temp: 70000 + |---trip_point_2_type: active0 + |---trip_point_3_temp: 60000 + |---trip_point_3_type: active1 + |---cdev0: --->/sys/class/thermal/cooling_device0 + |---cdev0_trip_point: 1 /* cdev0 can be used for passive */ + |---cdev1: --->/sys/class/thermal/cooling_device3 + |---cdev1_trip_point: 2 /* cdev1 can be used for active[0]*/ |cooling_device0: - |-----type: Processor - |-----max_state: 8 - |-----cur_state: 0 + |---type: Processor + |---max_state: 8 + |---cur_state: 0 |cooling_device3: - |-----type: Fan - |-----max_state: 2 - |-----cur_state: 0 + |---type: Fan + |---max_state: 2 + |---cur_state: 0 /sys/class/hwmon: |hwmon0: - |-----name: acpitz - |-----temp1_input: 37000 - |-----temp1_crit: 100000 + |---name: acpitz + |---temp1_input: 37000 + |---temp1_crit: 100000 diff --git a/Documentation/timers/hpet.txt b/Documentation/timers/hpet.txt index 04763a32552..16d25e6b5a0 100644 --- a/Documentation/timers/hpet.txt +++ b/Documentation/timers/hpet.txt @@ -3,7 +3,7 @@ The High Precision Event Timer (HPET) hardware follows a specification by Intel and Microsoft which can be found at - http://www.intel.com/technology/architecture/hpetspec.htm + http://www.intel.com/hardwaredesign/hpetspec_1.pdf Each HPET has one fixed-rate counter (at 10+ MHz, hence "High Precision") and up to 32 comparators. Normally three or more comparators are provided, diff --git a/Documentation/trace/ftrace-design.txt b/Documentation/trace/ftrace-design.txt index 7003e10f10f..641a1ef2a7f 100644 --- a/Documentation/trace/ftrace-design.txt +++ b/Documentation/trace/ftrace-design.txt @@ -213,10 +213,19 @@ If you can't trace NMI functions, then skip this option. <details to be filled> -HAVE_FTRACE_SYSCALLS +HAVE_SYSCALL_TRACEPOINTS --------------------- -<details to be filled> +You need very few things to get the syscalls tracing in an arch. + +- Have a NR_syscalls variable in <asm/unistd.h> that provides the number + of syscalls supported by the arch. +- Implement arch_syscall_addr() that resolves a syscall address from a + syscall number. +- Support the TIF_SYSCALL_TRACEPOINT thread flags +- Put the trace_sys_enter() and trace_sys_exit() tracepoints calls from ptrace + in the ptrace syscalls tracing path. +- Tag this arch as HAVE_SYSCALL_TRACEPOINTS. HAVE_FTRACE_MCOUNT_RECORD diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 957b22fde2d..8179692fbb9 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -1231,6 +1231,7 @@ something like this simple program: #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> +#include <string.h> #define _STR(x) #x #define STR(x) _STR(x) @@ -1265,6 +1266,7 @@ const char *find_debugfs(void) return NULL; } + strcat(debugfs, "/tracing/"); debugfs_found = 1; return debugfs; diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt new file mode 100644 index 00000000000..47aabeebbdf --- /dev/null +++ b/Documentation/trace/kprobetrace.txt @@ -0,0 +1,149 @@ + Kprobe-based Event Tracing + ========================== + + Documentation is written by Masami Hiramatsu + + +Overview +-------- +These events are similar to tracepoint based events. Instead of Tracepoint, +this is based on kprobes (kprobe and kretprobe). So it can probe wherever +kprobes can probe (this means, all functions body except for __kprobes +functions). Unlike the Tracepoint based event, this can be added and removed +dynamically, on the fly. + +To enable this feature, build your kernel with CONFIG_KPROBE_TRACING=y. + +Similar to the events tracer, this doesn't need to be activated via +current_tracer. Instead of that, add probe points via +/sys/kernel/debug/tracing/kprobe_events, and enable it via +/sys/kernel/debug/tracing/events/kprobes/<EVENT>/enabled. + + +Synopsis of kprobe_events +------------------------- + p[:[GRP/]EVENT] SYMBOL[+offs]|MEMADDR [FETCHARGS] : Set a probe + r[:[GRP/]EVENT] SYMBOL[+0] [FETCHARGS] : Set a return probe + + GRP : Group name. If omitted, use "kprobes" for it. + EVENT : Event name. If omitted, the event name is generated + based on SYMBOL+offs or MEMADDR. + SYMBOL[+offs] : Symbol+offset where the probe is inserted. + MEMADDR : Address where the probe is inserted. + + FETCHARGS : Arguments. Each probe can have up to 128 args. + %REG : Fetch register REG + @ADDR : Fetch memory at ADDR (ADDR should be in kernel) + @SYM[+|-offs] : Fetch memory at SYM +|- offs (SYM should be a data symbol) + $stackN : Fetch Nth entry of stack (N >= 0) + $stack : Fetch stack address. + $argN : Fetch function argument. (N >= 0)(*) + $retval : Fetch return value.(**) + +|-offs(FETCHARG) : Fetch memory at FETCHARG +|- offs address.(***) + NAME=FETCHARG: Set NAME as the argument name of FETCHARG. + + (*) aN may not correct on asmlinkaged functions and at the middle of + function body. + (**) only for return probe. + (***) this is useful for fetching a field of data structures. + + +Per-Probe Event Filtering +------------------------- + Per-probe event filtering feature allows you to set different filter on each +probe and gives you what arguments will be shown in trace buffer. If an event +name is specified right after 'p:' or 'r:' in kprobe_events, it adds an event +under tracing/events/kprobes/<EVENT>, at the directory you can see 'id', +'enabled', 'format' and 'filter'. + +enabled: + You can enable/disable the probe by writing 1 or 0 on it. + +format: + This shows the format of this probe event. + +filter: + You can write filtering rules of this event. + +id: + This shows the id of this probe event. + + +Event Profiling +--------------- + You can check the total number of probe hits and probe miss-hits via +/sys/kernel/debug/tracing/kprobe_profile. + The first column is event name, the second is the number of probe hits, +the third is the number of probe miss-hits. + + +Usage examples +-------------- +To add a probe as a new event, write a new definition to kprobe_events +as below. + + echo p:myprobe do_sys_open dfd=$arg0 filename=$arg1 flags=$arg2 mode=$arg3 > /sys/kernel/debug/tracing/kprobe_events + + This sets a kprobe on the top of do_sys_open() function with recording +1st to 4th arguments as "myprobe" event. As this example shows, users can +choose more familiar names for each arguments. + + echo r:myretprobe do_sys_open $retval >> /sys/kernel/debug/tracing/kprobe_events + + This sets a kretprobe on the return point of do_sys_open() function with +recording return value as "myretprobe" event. + You can see the format of these events via +/sys/kernel/debug/tracing/events/kprobes/<EVENT>/format. + + cat /sys/kernel/debug/tracing/events/kprobes/myprobe/format +name: myprobe +ID: 75 +format: + field:unsigned short common_type; offset:0; size:2; + field:unsigned char common_flags; offset:2; size:1; + field:unsigned char common_preempt_count; offset:3; size:1; + field:int common_pid; offset:4; size:4; + field:int common_tgid; offset:8; size:4; + + field: unsigned long ip; offset:16;tsize:8; + field: int nargs; offset:24;tsize:4; + field: unsigned long dfd; offset:32;tsize:8; + field: unsigned long filename; offset:40;tsize:8; + field: unsigned long flags; offset:48;tsize:8; + field: unsigned long mode; offset:56;tsize:8; + +print fmt: "(%lx) dfd=%lx filename=%lx flags=%lx mode=%lx", REC->ip, REC->dfd, REC->filename, REC->flags, REC->mode + + + You can see that the event has 4 arguments as in the expressions you specified. + + echo > /sys/kernel/debug/tracing/kprobe_events + + This clears all probe points. + + Right after definition, each event is disabled by default. For tracing these +events, you need to enable it. + + echo 1 > /sys/kernel/debug/tracing/events/kprobes/myprobe/enable + echo 1 > /sys/kernel/debug/tracing/events/kprobes/myretprobe/enable + + And you can see the traced information via /sys/kernel/debug/tracing/trace. + + cat /sys/kernel/debug/tracing/trace +# tracer: nop +# +# TASK-PID CPU# TIMESTAMP FUNCTION +# | | | | | + <...>-1447 [001] 1038282.286875: myprobe: (do_sys_open+0x0/0xd6) dfd=3 filename=7fffd1ec4440 flags=8000 mode=0 + <...>-1447 [001] 1038282.286878: myretprobe: (sys_openat+0xc/0xe <- do_sys_open) $retval=fffffffffffffffe + <...>-1447 [001] 1038282.286885: myprobe: (do_sys_open+0x0/0xd6) dfd=ffffff9c filename=40413c flags=8000 mode=1b6 + <...>-1447 [001] 1038282.286915: myretprobe: (sys_open+0x1b/0x1d <- do_sys_open) $retval=3 + <...>-1447 [001] 1038282.286969: myprobe: (do_sys_open+0x0/0xd6) dfd=ffffff9c filename=4041c6 flags=98800 mode=10 + <...>-1447 [001] 1038282.286976: myretprobe: (sys_open+0x1b/0x1d <- do_sys_open) $retval=3 + + + Each line shows when the kernel hits an event, and <- SYMBOL means kernel +returns from SYMBOL(e.g. "sys_open+0x1b/0x1d <- do_sys_open" means kernel +returns from do_sys_open to sys_open+0x1b). + + diff --git a/Documentation/usb/power-management.txt b/Documentation/usb/power-management.txt index ad642615ad4..c7c1dc2f801 100644 --- a/Documentation/usb/power-management.txt +++ b/Documentation/usb/power-management.txt @@ -2,7 +2,7 @@ Alan Stern <stern@rowland.harvard.edu> - October 5, 2007 + November 10, 2009 @@ -123,9 +123,9 @@ relevant attribute files are: wakeup, level, and autosuspend. power/level - This file contains one of three words: "on", "auto", - or "suspend". You can write those words to the file - to change the device's setting. + This file contains one of two words: "on" or "auto". + You can write those words to the file to change the + device's setting. "on" means that the device should be resumed and autosuspend is not allowed. (Of course, system @@ -134,10 +134,10 @@ relevant attribute files are: wakeup, level, and autosuspend. "auto" is the normal state in which the kernel is allowed to autosuspend and autoresume the device. - "suspend" means that the device should remain - suspended, and autoresume is not allowed. (But remote - wakeup may still be allowed, since it is controlled - separately by the power/wakeup attribute.) + (In kernels up to 2.6.32, you could also specify + "suspend", meaning that the device should remain + suspended and autoresume was not allowed. This + setting is no longer supported.) power/autosuspend @@ -313,13 +313,14 @@ three of the methods listed above. In addition, a driver indicates that it supports autosuspend by setting the .supports_autosuspend flag in its usb_driver structure. It is then responsible for informing the USB core whenever one of its interfaces becomes busy or idle. The -driver does so by calling these five functions: +driver does so by calling these six functions: int usb_autopm_get_interface(struct usb_interface *intf); void usb_autopm_put_interface(struct usb_interface *intf); - int usb_autopm_set_interface(struct usb_interface *intf); int usb_autopm_get_interface_async(struct usb_interface *intf); void usb_autopm_put_interface_async(struct usb_interface *intf); + void usb_autopm_get_interface_no_resume(struct usb_interface *intf); + void usb_autopm_put_interface_no_suspend(struct usb_interface *intf); The functions work by maintaining a counter in the usb_interface structure. When intf->pm_usage_count is > 0 then the interface is @@ -331,11 +332,13 @@ considered to be idle, and the kernel may autosuspend the device. associated with the device itself rather than any of its interfaces. This field is used only by the USB core.) -The driver owns intf->pm_usage_count; it can modify the value however -and whenever it likes. A nice aspect of the non-async usb_autopm_* -routines is that the changes they make are protected by the usb_device -structure's PM mutex (udev->pm_mutex); however drivers may change -pm_usage_count without holding the mutex. Drivers using the async +Drivers must not modify intf->pm_usage_count directly; its value +should be changed only be using the functions listed above. Drivers +are responsible for insuring that the overall change to pm_usage_count +during their lifetime balances out to 0 (it may be necessary for the +disconnect method to call usb_autopm_put_interface() one or more times +to fulfill this requirement). The first two routines use the PM mutex +in struct usb_device for mutual exclusion; drivers using the async routines are responsible for their own synchronization and mutual exclusion. @@ -347,11 +350,6 @@ exclusion. attempts an autosuspend if the new value is <= 0 and the device isn't suspended. - usb_autopm_set_interface() leaves pm_usage_count alone. - It attempts an autoresume if the value is > 0 and the device - is suspended, and it attempts an autosuspend if the value is - <= 0 and the device isn't suspended. - usb_autopm_get_interface_async() and usb_autopm_put_interface_async() do almost the same things as their non-async counterparts. The differences are: they do @@ -360,13 +358,11 @@ exclusion. such as an URB's completion handler, but when they return the device will not generally not yet be in the desired state. -There also are a couple of utility routines drivers can use: - - usb_autopm_enable() sets pm_usage_cnt to 0 and then calls - usb_autopm_set_interface(), which will attempt an autosuspend. - - usb_autopm_disable() sets pm_usage_cnt to 1 and then calls - usb_autopm_set_interface(), which will attempt an autoresume. + usb_autopm_get_interface_no_resume() and + usb_autopm_put_interface_no_suspend() merely increment or + decrement the pm_usage_count value; they do not attempt to + carry out an autoresume or an autosuspend. Hence they can be + called in an atomic context. The conventional usage pattern is that a driver calls usb_autopm_get_interface() in its open routine and @@ -400,11 +396,11 @@ though, setting this flag won't cause the kernel to autoresume it. Normally a driver would set this flag in its probe method, at which time the device is guaranteed not to be autosuspended.) -The usb_autopm_* routines have to run in a sleepable process context; -they must not be called from an interrupt handler or while holding a -spinlock. In fact, the entire autosuspend mechanism is not well geared -toward interrupt-driven operation. However there is one thing a -driver can do in an interrupt handler: +The synchronous usb_autopm_* routines have to run in a sleepable +process context; they must not be called from an interrupt handler or +while holding a spinlock. In fact, the entire autosuspend mechanism +is not well geared toward interrupt-driven operation. However there +is one thing a driver can do in an interrupt handler: usb_mark_last_busy(struct usb_device *udev); @@ -423,15 +419,16 @@ an URB had completed too recently. External suspend calls should never be allowed to fail in this way, only autosuspend calls. The driver can tell them apart by checking -udev->auto_pm; this flag will be set to 1 for internal PM events -(autosuspend or autoresume) and 0 for external PM events. +the PM_EVENT_AUTO bit in the message.event argument to the suspend +method; this bit will be set for internal PM events (autosuspend) and +clear for external PM events. Many of the ingredients in the autosuspend framework are oriented towards interfaces: The usb_interface structure contains the pm_usage_cnt field, and the usb_autopm_* routines take an interface pointer as their argument. But somewhat confusingly, a few of the -pieces (usb_mark_last_busy() and udev->auto_pm) use the usb_device -structure instead. Drivers need to keep this straight; they can call +pieces (i.e., usb_mark_last_busy()) use the usb_device structure +instead. Drivers need to keep this straight; they can call interface_to_usbdev() to find the device structure for a given interface. diff --git a/Documentation/video4linux/CARDLIST.cx23885 b/Documentation/video4linux/CARDLIST.cx23885 index 5f33d848610..7539e8fa1ff 100644 --- a/Documentation/video4linux/CARDLIST.cx23885 +++ b/Documentation/video4linux/CARDLIST.cx23885 @@ -24,3 +24,5 @@ 23 -> Magic-Pro ProHDTV Extreme 2 [14f1:8657] 24 -> Hauppauge WinTV-HVR1850 [0070:8541] 25 -> Compro VideoMate E800 [1858:e800] + 26 -> Hauppauge WinTV-HVR1290 [0070:8551] + 27 -> Mygica X8558 PRO DMB-TH [14f1:8578] diff --git a/Documentation/video4linux/CARDLIST.cx88 b/Documentation/video4linux/CARDLIST.cx88 index 3385f8b094a..7ec3c4e4b60 100644 --- a/Documentation/video4linux/CARDLIST.cx88 +++ b/Documentation/video4linux/CARDLIST.cx88 @@ -81,3 +81,4 @@ 80 -> Hauppauge WinTV-IR Only [0070:9290] 81 -> Leadtek WinFast DTV1800 Hybrid [107d:6654] 82 -> WinFast DTV2000 H rev. J [107d:6f2b] + 83 -> Prof 7301 DVB-S/S2 [b034:3034] diff --git a/Documentation/video4linux/CARDLIST.em28xx b/Documentation/video4linux/CARDLIST.em28xx index b8afef4c0e0..0c166ff003a 100644 --- a/Documentation/video4linux/CARDLIST.em28xx +++ b/Documentation/video4linux/CARDLIST.em28xx @@ -1,5 +1,5 @@ 0 -> Unknown EM2800 video grabber (em2800) [eb1a:2800] - 1 -> Unknown EM2750/28xx video grabber (em2820/em2840) [eb1a:2710,eb1a:2820,eb1a:2821,eb1a:2860,eb1a:2861,eb1a:2870,eb1a:2881,eb1a:2883,eb1a:2868] + 1 -> Unknown EM2750/28xx video grabber (em2820/em2840) [eb1a:2710,eb1a:2820,eb1a:2821,eb1a:2860,eb1a:2861,eb1a:2862,eb1a:2870,eb1a:2881,eb1a:2883,eb1a:2868] 2 -> Terratec Cinergy 250 USB (em2820/em2840) [0ccd:0036] 3 -> Pinnacle PCTV USB 2 (em2820/em2840) [2304:0208] 4 -> Hauppauge WinTV USB 2 (em2820/em2840) [2040:4200,2040:4201] @@ -69,3 +69,4 @@ 71 -> Silvercrest Webcam 1.3mpix (em2820/em2840) 72 -> Gadmei UTV330+ (em2861) 73 -> Reddo DVB-C USB TV Box (em2870) + 74 -> Actionmaster/LinXcel/Digitus VC211A (em2800) diff --git a/Documentation/video4linux/CARDLIST.saa7134 b/Documentation/video4linux/CARDLIST.saa7134 index 2620d60341e..fce1e7eb047 100644 --- a/Documentation/video4linux/CARDLIST.saa7134 +++ b/Documentation/video4linux/CARDLIST.saa7134 @@ -172,3 +172,5 @@ 171 -> Beholder BeholdTV X7 [5ace:7595] 172 -> RoverMedia TV Link Pro FM [19d1:0138] 173 -> Zolid Hybrid TV Tuner PCI [1131:2004] +174 -> Asus Europa Hybrid OEM [1043:4847] +175 -> Leadtek Winfast DTV1000S [107d:6655] diff --git a/Documentation/video4linux/gspca.txt b/Documentation/video4linux/gspca.txt index 3f61825be49..319d9838e87 100644 --- a/Documentation/video4linux/gspca.txt +++ b/Documentation/video4linux/gspca.txt @@ -6,7 +6,8 @@ The modules are: xxxx vend:prod ---- -spca501 0000:0000 MystFromOri Unknow Camera +spca501 0000:0000 MystFromOri Unknown Camera +spca508 0130:0130 Clone Digital Webcam 11043 m5602 0402:5602 ALi Video Camera Controller spca501 040a:0002 Kodak DVC-325 spca500 040a:0300 Kodak EZ200 @@ -37,6 +38,7 @@ ov519 041e:405f Creative Live! VISTA VF0330 ov519 041e:4060 Creative Live! VISTA VF0350 ov519 041e:4061 Creative Live! VISTA VF0400 ov519 041e:4064 Creative Live! VISTA VF0420 +ov519 041e:4067 Creative Live! Cam Video IM (VF0350) ov519 041e:4068 Creative Live! VISTA VF0470 spca561 0458:7004 Genius VideoCAM Express V2 sunplus 0458:7006 Genius Dsc 1.3 Smart @@ -68,12 +70,12 @@ zc3xx 046d:08a3 Logitech QC Chat zc3xx 046d:08a6 Logitech QCim zc3xx 046d:08a7 Logitech QuickCam Image zc3xx 046d:08a9 Logitech Notebook Deluxe -zc3xx 046d:08aa Labtec Webcam Notebook +zc3xx 046d:08aa Labtec Webcam Notebook zc3xx 046d:08ac Logitech QuickCam Cool zc3xx 046d:08ad Logitech QCCommunicate STX zc3xx 046d:08ae Logitech QuickCam for Notebooks zc3xx 046d:08af Logitech QuickCam Cool -zc3xx 046d:08b9 Logitech QC IM ??? +zc3xx 046d:08b9 Logitech QuickCam Express zc3xx 046d:08d7 Logitech QCam STX zc3xx 046d:08d9 Logitech QuickCam IM/Connect zc3xx 046d:08d8 Logitech Notebook Deluxe @@ -82,7 +84,7 @@ zc3xx 046d:08dd Logitech QuickCam for Notebooks spca500 046d:0900 Logitech Inc. ClickSmart 310 spca500 046d:0901 Logitech Inc. ClickSmart 510 sunplus 046d:0905 Logitech ClickSmart 820 -tv8532 046d:0920 QC Express +tv8532 046d:0920 Logitech QuickCam Express tv8532 046d:0921 Labtec Webcam spca561 046d:0928 Logitech QC Express Etch2 spca561 046d:0929 Labtec Webcam Elch2 @@ -91,7 +93,7 @@ spca561 046d:092b Labtec Webcam Plus spca561 046d:092c Logitech QC chat Elch2 spca561 046d:092d Logitech QC Elch2 spca561 046d:092e Logitech QC Elch2 -spca561 046d:092f Logitech QuickCam Express Plus +spca561 046d:092f Logitech QuickCam Express Plus sunplus 046d:0960 Logitech ClickSmart 420 sunplus 0471:0322 Philips DMVC1300K zc3xx 0471:0325 Philips SPC 200 NC @@ -187,7 +189,6 @@ sonixj 06f8:3004 Hercules Classic Silver sonixj 06f8:3008 Hercules Deluxe Optical Glass pac7311 06f8:3009 Hercules Classic Link spca508 0733:0110 ViewQuest VQ110 -spca508 0130:0130 Clone Digital Webcam 11043 spca501 0733:0401 Intel Create and Share spca501 0733:0402 ViewQuest M318B spca505 0733:0430 Intel PC Camera Pro @@ -202,6 +203,7 @@ spca500 084d:0003 D-Link DSC-350 spca500 08ca:0103 Aiptek PocketDV sunplus 08ca:0104 Aiptek PocketDVII 1.3 sunplus 08ca:0106 Aiptek Pocket DV3100+ +mr97310a 08ca:0110 Trust Spyc@m 100 mr97310a 08ca:0111 Aiptek PenCam VGA+ sunplus 08ca:2008 Aiptek Mini PenCam 2 M sunplus 08ca:2010 Aiptek PocketCam 3M @@ -222,7 +224,7 @@ pac207 093a:2460 Qtec Webcam 100 pac207 093a:2461 HP Webcam pac207 093a:2463 Philips SPC 220 NC pac207 093a:2464 Labtec Webcam 1200 -pac207 093a:2468 PAC207 +pac207 093a:2468 Webcam WB-1400T pac207 093a:2470 Genius GF112 pac207 093a:2471 Genius VideoCam ge111 pac207 093a:2472 Genius VideoCam ge110 @@ -230,7 +232,7 @@ pac207 093a:2474 Genius iLook 111 pac207 093a:2476 Genius e-Messenger 112 pac7311 093a:2600 PAC7311 Typhoon pac7311 093a:2601 Philips SPC 610 NC -pac7311 093a:2603 PAC7312 +pac7311 093a:2603 Philips SPC 500 NC pac7311 093a:2608 Trust WB-3300p pac7311 093a:260e Gigaware VGA PC Camera, Trust WB-3350p, SIGMA cam 2350 pac7311 093a:260f SnakeCam @@ -239,6 +241,7 @@ pac7311 093a:2621 PAC731x pac7311 093a:2622 Genius Eye 312 pac7311 093a:2624 PAC7302 pac7311 093a:2626 Labtec 2200 +pac7311 093a:2628 Genius iLook 300 pac7311 093a:2629 Genious iSlim 300 pac7311 093a:262a Webcam 300k pac7311 093a:262c Philips SPC 230 NC @@ -250,7 +253,7 @@ vc032x 0ac8:0328 A4Tech PK-130MG zc3xx 0ac8:301b Z-Star zc301b zc3xx 0ac8:303b Vimicro 0x303b zc3xx 0ac8:305b Z-star Vimicro zc0305b -zc3xx 0ac8:307b Ldlc VC302+Ov7620 +zc3xx 0ac8:307b PC Camera (ZS0211) vc032x 0ac8:c001 Sony embedded vimicro vc032x 0ac8:c002 Sony embedded vimicro vc032x 0ac8:c301 Samsung Q1 Ultra Premium diff --git a/Documentation/video4linux/si4713.txt b/Documentation/video4linux/si4713.txt index 25abdb78209..2e7392a4fee 100644 --- a/Documentation/video4linux/si4713.txt +++ b/Documentation/video4linux/si4713.txt @@ -164,7 +164,7 @@ Stereo/Mono and RDS subchannels The device can also be configured using the available sub channels for transmission. To do that use S/G_MODULATOR ioctl and configure txsubchans properly. -Refer to v4l2-spec for proper use of this ioctl. +Refer to the V4L2 API specification for proper use of this ioctl. Testing ======= diff --git a/Documentation/video4linux/zr364xx.txt b/Documentation/video4linux/zr364xx.txt index 7f3d1955d21..d98e4d30297 100644 --- a/Documentation/video4linux/zr364xx.txt +++ b/Documentation/video4linux/zr364xx.txt @@ -66,3 +66,4 @@ Vendor Product Distributor Model 0x0a17 0x004e Pentax Optio 50 0x041e 0x405d Creative DiVi CAM 516 0x08ca 0x2102 Aiptek DV T300 +0x06d6 0x003d Trust Powerc@m 910Z diff --git a/Documentation/vm/hwpoison.txt b/Documentation/vm/hwpoison.txt new file mode 100644 index 00000000000..3ffadf8da61 --- /dev/null +++ b/Documentation/vm/hwpoison.txt @@ -0,0 +1,136 @@ +What is hwpoison? + +Upcoming Intel CPUs have support for recovering from some memory errors +(``MCA recovery''). This requires the OS to declare a page "poisoned", +kill the processes associated with it and avoid using it in the future. + +This patchkit implements the necessary infrastructure in the VM. + +To quote the overview comment: + + * High level machine check handler. Handles pages reported by the + * hardware as being corrupted usually due to a 2bit ECC memory or cache + * failure. + * + * This focusses on pages detected as corrupted in the background. + * When the current CPU tries to consume corruption the currently + * running process can just be killed directly instead. This implies + * that if the error cannot be handled for some reason it's safe to + * just ignore it because no corruption has been consumed yet. Instead + * when that happens another machine check will happen. + * + * Handles page cache pages in various states. The tricky part + * here is that we can access any page asynchronous to other VM + * users, because memory failures could happen anytime and anywhere, + * possibly violating some of their assumptions. This is why this code + * has to be extremely careful. Generally it tries to use normal locking + * rules, as in get the standard locks, even if that means the + * error handling takes potentially a long time. + * + * Some of the operations here are somewhat inefficient and have non + * linear algorithmic complexity, because the data structures have not + * been optimized for this case. This is in particular the case + * for the mapping from a vma to a process. Since this case is expected + * to be rare we hope we can get away with this. + +The code consists of a the high level handler in mm/memory-failure.c, +a new page poison bit and various checks in the VM to handle poisoned +pages. + +The main target right now is KVM guests, but it works for all kinds +of applications. KVM support requires a recent qemu-kvm release. + +For the KVM use there was need for a new signal type so that +KVM can inject the machine check into the guest with the proper +address. This in theory allows other applications to handle +memory failures too. The expection is that near all applications +won't do that, but some very specialized ones might. + +--- + +There are two (actually three) modi memory failure recovery can be in: + +vm.memory_failure_recovery sysctl set to zero: + All memory failures cause a panic. Do not attempt recovery. + (on x86 this can be also affected by the tolerant level of the + MCE subsystem) + +early kill + (can be controlled globally and per process) + Send SIGBUS to the application as soon as the error is detected + This allows applications who can process memory errors in a gentle + way (e.g. drop affected object) + This is the mode used by KVM qemu. + +late kill + Send SIGBUS when the application runs into the corrupted page. + This is best for memory error unaware applications and default + Note some pages are always handled as late kill. + +--- + +User control: + +vm.memory_failure_recovery + See sysctl.txt + +vm.memory_failure_early_kill + Enable early kill mode globally + +PR_MCE_KILL + Set early/late kill mode/revert to system default + arg1: PR_MCE_KILL_CLEAR: Revert to system default + arg1: PR_MCE_KILL_SET: arg2 defines thread specific mode + PR_MCE_KILL_EARLY: Early kill + PR_MCE_KILL_LATE: Late kill + PR_MCE_KILL_DEFAULT: Use system global default +PR_MCE_KILL_GET + return current mode + + +--- + +Testing: + +madvise(MADV_POISON, ....) + (as root) + Poison a page in the process for testing + + +hwpoison-inject module through debugfs + /sys/debug/hwpoison/corrupt-pfn + +Inject hwpoison fault at PFN echoed into this file + + +Architecture specific MCE injector + +x86 has mce-inject, mce-test + +Some portable hwpoison test programs in mce-test, see blow. + +--- + +References: + +http://halobates.de/mce-lc09-2.pdf + Overview presentation from LinuxCon 09 + +git://git.kernel.org/pub/scm/utils/cpu/mce/mce-test.git + Test suite (hwpoison specific portable tests in tsrc) + +git://git.kernel.org/pub/scm/utils/cpu/mce/mce-inject.git + x86 specific injector + + +--- + +Limitations: + +- Not all page types are supported and never will. Most kernel internal +objects cannot be recovered, only LRU pages for now. +- Right now hugepage support is missing. + +--- +Andi Kleen, Oct 2009 + diff --git a/Documentation/vm/ksm.txt b/Documentation/vm/ksm.txt index 72a22f65960..262d8e6793a 100644 --- a/Documentation/vm/ksm.txt +++ b/Documentation/vm/ksm.txt @@ -52,15 +52,15 @@ The KSM daemon is controlled by sysfs files in /sys/kernel/mm/ksm/, readable by all but writable only by root: max_kernel_pages - set to maximum number of kernel pages that KSM may use - e.g. "echo 2000 > /sys/kernel/mm/ksm/max_kernel_pages" + e.g. "echo 100000 > /sys/kernel/mm/ksm/max_kernel_pages" Value 0 imposes no limit on the kernel pages KSM may use; but note that any process using MADV_MERGEABLE can cause KSM to allocate these pages, unswappable until it exits. - Default: 2000 (chosen for demonstration purposes) + Default: quarter of memory (chosen to not pin too much) pages_to_scan - how many present pages to scan before ksmd goes to sleep - e.g. "echo 200 > /sys/kernel/mm/ksm/pages_to_scan" - Default: 200 (chosen for demonstration purposes) + e.g. "echo 100 > /sys/kernel/mm/ksm/pages_to_scan" + Default: 100 (chosen for demonstration purposes) sleep_millisecs - how many milliseconds ksmd should sleep before next scan e.g. "echo 20 > /sys/kernel/mm/ksm/sleep_millisecs" @@ -70,7 +70,8 @@ run - set 0 to stop ksmd from running but keep merged pages, set 1 to run ksmd e.g. "echo 1 > /sys/kernel/mm/ksm/run", set 2 to stop ksmd and unmerge all pages currently merged, but leave mergeable areas registered for next run - Default: 1 (for immediate use by apps which register) + Default: 0 (must be changed to 1 to activate KSM, + except if CONFIG_SYSFS is disabled) The effectiveness of KSM and MADV_MERGEABLE is shown in /sys/kernel/mm/ksm/: @@ -86,4 +87,4 @@ pages_volatile embraces several different kinds of activity, but a high proportion there would also indicate poor use of madvise MADV_MERGEABLE. Izik Eidus, -Hugh Dickins, 30 July 2009 +Hugh Dickins, 24 Sept 2009 diff --git a/Documentation/vm/page-types.c b/Documentation/vm/page-types.c index fa1a30d9e9d..ea44ea502da 100644 --- a/Documentation/vm/page-types.c +++ b/Documentation/vm/page-types.c @@ -2,7 +2,10 @@ * page-types: Tool for querying page flags * * Copyright (C) 2009 Intel corporation - * Copyright (C) 2009 Wu Fengguang <fengguang.wu@intel.com> + * + * Authors: Wu Fengguang <fengguang.wu@intel.com> + * + * Released under the General Public License (GPL). */ #define _LARGEFILE64_SOURCE @@ -69,7 +72,9 @@ #define KPF_COMPOUND_TAIL 16 #define KPF_HUGE 17 #define KPF_UNEVICTABLE 18 +#define KPF_HWPOISON 19 #define KPF_NOPAGE 20 +#define KPF_KSM 21 /* [32-] kernel hacking assistances */ #define KPF_RESERVED 32 @@ -116,7 +121,9 @@ static char *page_flag_names[] = { [KPF_COMPOUND_TAIL] = "T:compound_tail", [KPF_HUGE] = "G:huge", [KPF_UNEVICTABLE] = "u:unevictable", + [KPF_HWPOISON] = "X:hwpoison", [KPF_NOPAGE] = "n:nopage", + [KPF_KSM] = "x:ksm", [KPF_RESERVED] = "r:reserved", [KPF_MLOCKED] = "m:mlocked", @@ -152,9 +159,6 @@ static unsigned long opt_size[MAX_ADDR_RANGES]; static int nr_vmas; static unsigned long pg_start[MAX_VMAS]; static unsigned long pg_end[MAX_VMAS]; -static unsigned long voffset; - -static int pagemap_fd; #define MAX_BIT_FILTERS 64 static int nr_bit_filters; @@ -163,9 +167,16 @@ static uint64_t opt_bits[MAX_BIT_FILTERS]; static int page_size; -#define PAGES_BATCH (64 << 10) /* 64k pages */ +static int pagemap_fd; static int kpageflags_fd; +static int opt_hwpoison; +static int opt_unpoison; + +static char *hwpoison_debug_fs = "/debug/hwpoison"; +static int hwpoison_inject_fd; +static int hwpoison_forget_fd; + #define HASH_SHIFT 13 #define HASH_SIZE (1 << HASH_SHIFT) #define HASH_MASK (HASH_SIZE - 1) @@ -207,6 +218,74 @@ static void fatal(const char *x, ...) exit(EXIT_FAILURE); } +static int checked_open(const char *pathname, int flags) +{ + int fd = open(pathname, flags); + + if (fd < 0) { + perror(pathname); + exit(EXIT_FAILURE); + } + + return fd; +} + +/* + * pagemap/kpageflags routines + */ + +static unsigned long do_u64_read(int fd, char *name, + uint64_t *buf, + unsigned long index, + unsigned long count) +{ + long bytes; + + if (index > ULONG_MAX / 8) + fatal("index overflow: %lu\n", index); + + if (lseek(fd, index * 8, SEEK_SET) < 0) { + perror(name); + exit(EXIT_FAILURE); + } + + bytes = read(fd, buf, count * 8); + if (bytes < 0) { + perror(name); + exit(EXIT_FAILURE); + } + if (bytes % 8) + fatal("partial read: %lu bytes\n", bytes); + + return bytes / 8; +} + +static unsigned long kpageflags_read(uint64_t *buf, + unsigned long index, + unsigned long pages) +{ + return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages); +} + +static unsigned long pagemap_read(uint64_t *buf, + unsigned long index, + unsigned long pages) +{ + return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); +} + +static unsigned long pagemap_pfn(uint64_t val) +{ + unsigned long pfn; + + if (val & PM_PRESENT) + pfn = PM_PFRAME(val); + else + pfn = 0; + + return pfn; +} + /* * page flag names @@ -222,7 +301,7 @@ static char *page_flag_name(uint64_t flags) present = (flags >> i) & 1; if (!page_flag_names[i]) { if (present) - fatal("unkown flag bit %d\n", i); + fatal("unknown flag bit %d\n", i); continue; } buf[j++] = present ? page_flag_names[i][0] : '_'; @@ -255,7 +334,8 @@ static char *page_flag_longname(uint64_t flags) * page list and summary */ -static void show_page_range(unsigned long offset, uint64_t flags) +static void show_page_range(unsigned long voffset, + unsigned long offset, uint64_t flags) { static uint64_t flags0; static unsigned long voff; @@ -281,7 +361,8 @@ static void show_page_range(unsigned long offset, uint64_t flags) count = 1; } -static void show_page(unsigned long offset, uint64_t flags) +static void show_page(unsigned long voffset, + unsigned long offset, uint64_t flags) { if (opt_pid) printf("%lx\t", voffset); @@ -362,6 +443,62 @@ static uint64_t well_known_flags(uint64_t flags) return flags; } +static uint64_t kpageflags_flags(uint64_t flags) +{ + flags = expand_overloaded_flags(flags); + + if (!opt_raw) + flags = well_known_flags(flags); + + return flags; +} + +/* + * page actions + */ + +static void prepare_hwpoison_fd(void) +{ + char buf[100]; + + if (opt_hwpoison && !hwpoison_inject_fd) { + sprintf(buf, "%s/corrupt-pfn", hwpoison_debug_fs); + hwpoison_inject_fd = checked_open(buf, O_WRONLY); + } + + if (opt_unpoison && !hwpoison_forget_fd) { + sprintf(buf, "%s/renew-pfn", hwpoison_debug_fs); + hwpoison_forget_fd = checked_open(buf, O_WRONLY); + } +} + +static int hwpoison_page(unsigned long offset) +{ + char buf[100]; + int len; + + len = sprintf(buf, "0x%lx\n", offset); + len = write(hwpoison_inject_fd, buf, len); + if (len < 0) { + perror("hwpoison inject"); + return len; + } + return 0; +} + +static int unpoison_page(unsigned long offset) +{ + char buf[100]; + int len; + + len = sprintf(buf, "0x%lx\n", offset); + len = write(hwpoison_forget_fd, buf, len); + if (len < 0) { + perror("hwpoison forget"); + return len; + } + return 0; +} /* * page frame walker @@ -394,104 +531,83 @@ static int hash_slot(uint64_t flags) exit(EXIT_FAILURE); } -static void add_page(unsigned long offset, uint64_t flags) +static void add_page(unsigned long voffset, + unsigned long offset, uint64_t flags) { - flags = expand_overloaded_flags(flags); - - if (!opt_raw) - flags = well_known_flags(flags); + flags = kpageflags_flags(flags); if (!bit_mask_ok(flags)) return; + if (opt_hwpoison) + hwpoison_page(offset); + if (opt_unpoison) + unpoison_page(offset); + if (opt_list == 1) - show_page_range(offset, flags); + show_page_range(voffset, offset, flags); else if (opt_list == 2) - show_page(offset, flags); + show_page(voffset, offset, flags); nr_pages[hash_slot(flags)]++; total_pages++; } -static void walk_pfn(unsigned long index, unsigned long count) +#define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ +static void walk_pfn(unsigned long voffset, + unsigned long index, + unsigned long count) { + uint64_t buf[KPAGEFLAGS_BATCH]; unsigned long batch; - unsigned long n; + unsigned long pages; unsigned long i; - if (index > ULONG_MAX / KPF_BYTES) - fatal("index overflow: %lu\n", index); - - lseek(kpageflags_fd, index * KPF_BYTES, SEEK_SET); - while (count) { - uint64_t kpageflags_buf[KPF_BYTES * PAGES_BATCH]; - - batch = min_t(unsigned long, count, PAGES_BATCH); - n = read(kpageflags_fd, kpageflags_buf, batch * KPF_BYTES); - if (n == 0) + batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); + pages = kpageflags_read(buf, index, batch); + if (pages == 0) break; - if (n < 0) { - perror(PROC_KPAGEFLAGS); - exit(EXIT_FAILURE); - } - if (n % KPF_BYTES != 0) - fatal("partial read: %lu bytes\n", n); - n = n / KPF_BYTES; + for (i = 0; i < pages; i++) + add_page(voffset + i, index + i, buf[i]); - for (i = 0; i < n; i++) - add_page(index + i, kpageflags_buf[i]); - - index += batch; - count -= batch; + index += pages; + count -= pages; } } - -#define PAGEMAP_BATCH 4096 -static unsigned long task_pfn(unsigned long pgoff) +#define PAGEMAP_BATCH (64 << 10) +static void walk_vma(unsigned long index, unsigned long count) { - static uint64_t buf[PAGEMAP_BATCH]; - static unsigned long start; - static long count; - uint64_t pfn; + uint64_t buf[PAGEMAP_BATCH]; + unsigned long batch; + unsigned long pages; + unsigned long pfn; + unsigned long i; - if (pgoff < start || pgoff >= start + count) { - if (lseek64(pagemap_fd, - (uint64_t)pgoff * PM_ENTRY_BYTES, - SEEK_SET) < 0) { - perror("pagemap seek"); - exit(EXIT_FAILURE); - } - count = read(pagemap_fd, buf, sizeof(buf)); - if (count == 0) - return 0; - if (count < 0) { - perror("pagemap read"); - exit(EXIT_FAILURE); - } - if (count % PM_ENTRY_BYTES) { - fatal("pagemap read not aligned.\n"); - exit(EXIT_FAILURE); - } - count /= PM_ENTRY_BYTES; - start = pgoff; - } + while (count) { + batch = min_t(unsigned long, count, PAGEMAP_BATCH); + pages = pagemap_read(buf, index, batch); + if (pages == 0) + break; - pfn = buf[pgoff - start]; - if (pfn & PM_PRESENT) - pfn = PM_PFRAME(pfn); - else - pfn = 0; + for (i = 0; i < pages; i++) { + pfn = pagemap_pfn(buf[i]); + if (pfn) + walk_pfn(index + i, pfn, 1); + } - return pfn; + index += pages; + count -= pages; + } } static void walk_task(unsigned long index, unsigned long count) { - int i = 0; const unsigned long end = index + count; + unsigned long start; + int i = 0; while (index < end) { @@ -501,15 +617,11 @@ static void walk_task(unsigned long index, unsigned long count) if (pg_start[i] >= end) return; - voffset = max_t(unsigned long, pg_start[i], index); - index = min_t(unsigned long, pg_end[i], end); + start = max_t(unsigned long, pg_start[i], index); + index = min_t(unsigned long, pg_end[i], end); - assert(voffset < index); - for (; voffset < index; voffset++) { - unsigned long pfn = task_pfn(voffset); - if (pfn) - walk_pfn(pfn, 1); - } + assert(start < index); + walk_vma(start, index - start); } } @@ -527,18 +639,14 @@ static void walk_addr_ranges(void) { int i; - kpageflags_fd = open(PROC_KPAGEFLAGS, O_RDONLY); - if (kpageflags_fd < 0) { - perror(PROC_KPAGEFLAGS); - exit(EXIT_FAILURE); - } + kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); if (!nr_addr_ranges) add_addr_range(0, ULONG_MAX); for (i = 0; i < nr_addr_ranges; i++) if (!opt_pid) - walk_pfn(opt_offset[i], opt_size[i]); + walk_pfn(0, opt_offset[i], opt_size[i]); else walk_task(opt_offset[i], opt_size[i]); @@ -575,6 +683,8 @@ static void usage(void) " -l|--list Show page details in ranges\n" " -L|--list-each Show page details one by one\n" " -N|--no-summary Don't show summay info\n" +" -X|--hwpoison hwpoison pages\n" +" -x|--unpoison unpoison pages\n" " -h|--help Show this usage message\n" "addr-spec:\n" " N one page at offset N (unit: pages)\n" @@ -624,11 +734,7 @@ static void parse_pid(const char *str) opt_pid = parse_number(str); sprintf(buf, "/proc/%d/pagemap", opt_pid); - pagemap_fd = open(buf, O_RDONLY); - if (pagemap_fd < 0) { - perror(buf); - exit(EXIT_FAILURE); - } + pagemap_fd = checked_open(buf, O_RDONLY); sprintf(buf, "/proc/%d/maps", opt_pid); file = fopen(buf, "r"); @@ -788,6 +894,8 @@ static struct option opts[] = { { "list" , 0, NULL, 'l' }, { "list-each" , 0, NULL, 'L' }, { "no-summary", 0, NULL, 'N' }, + { "hwpoison" , 0, NULL, 'X' }, + { "unpoison" , 0, NULL, 'x' }, { "help" , 0, NULL, 'h' }, { NULL , 0, NULL, 0 } }; @@ -799,7 +907,7 @@ int main(int argc, char *argv[]) page_size = getpagesize(); while ((c = getopt_long(argc, argv, - "rp:f:a:b:lLNh", opts, NULL)) != -1) { + "rp:f:a:b:lLNXxh", opts, NULL)) != -1) { switch (c) { case 'r': opt_raw = 1; @@ -825,6 +933,14 @@ int main(int argc, char *argv[]) case 'N': opt_no_summary = 1; break; + case 'X': + opt_hwpoison = 1; + prepare_hwpoison_fd(); + break; + case 'x': + opt_unpoison = 1; + prepare_hwpoison_fd(); + break; case 'h': usage(); exit(0); @@ -844,7 +960,7 @@ int main(int argc, char *argv[]) walk_addr_ranges(); if (opt_list == 1) - show_page_range(0, 0); /* drain the buffer */ + show_page_range(0, 0, 0); /* drain the buffer */ if (opt_no_summary) return 0; diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt index 600a304a828..df09b9650a8 100644 --- a/Documentation/vm/pagemap.txt +++ b/Documentation/vm/pagemap.txt @@ -57,7 +57,9 @@ There are three components to pagemap: 16. COMPOUND_TAIL 16. HUGE 18. UNEVICTABLE + 19. HWPOISON 20. NOPAGE + 21. KSM Short descriptions to the page flags: @@ -86,9 +88,15 @@ Short descriptions to the page flags: 17. HUGE this is an integral part of a HugeTLB page +19. HWPOISON + hardware detected memory corruption on this page: don't touch the data! + 20. NOPAGE no page frame exists at the requested address +21. KSM + identical memory pages dynamically shared between one or more processes + [IO related page flags] 1. ERROR IO error occurred 3. UPTODATE page has up-to-date data diff --git a/Documentation/vm/slub.txt b/Documentation/vm/slub.txt index 510917ff59e..b37300edf27 100644 --- a/Documentation/vm/slub.txt +++ b/Documentation/vm/slub.txt @@ -245,7 +245,7 @@ been overwritten. Here a string of 8 characters was written into a slab that has the length of 8 characters. However, a 8 character string needs a terminating 0. That zero has overwritten the first byte of the Redzone field. After reporting the details of the issue encountered the FIX SLUB message -tell us that SLUB has restored the Redzone to its proper value and then +tells us that SLUB has restored the Redzone to its proper value and then system operations continue. Emergency operations: |
