diff options
Diffstat (limited to 'Documentation')
45 files changed, 1607 insertions, 904 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-net-batman-adv b/Documentation/ABI/testing/sysfs-class-net-batman-adv new file mode 100644 index 00000000000..38dd762def4 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-net-batman-adv @@ -0,0 +1,14 @@ + +What: /sys/class/net/<iface>/batman-adv/mesh_iface +Date: May 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + The /sys/class/net/<iface>/batman-adv/mesh_iface file + displays the batman mesh interface this <iface> + currently is associated with. + +What: /sys/class/net/<iface>/batman-adv/iface_status +Date: May 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Indicates the status of <iface> as it is seen by batman. diff --git a/Documentation/ABI/testing/sysfs-class-net-mesh b/Documentation/ABI/testing/sysfs-class-net-mesh new file mode 100644 index 00000000000..748fe1701d2 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-net-mesh @@ -0,0 +1,69 @@ + +What: /sys/class/net/<mesh_iface>/mesh/aggregated_ogms +Date: May 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Indicates whether the batman protocol messages of the + mesh <mesh_iface> shall be aggregated or not. + +What: /sys/class/net/<mesh_iface>/mesh/bonding +Date: June 2010 +Contact: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> +Description: + Indicates whether the data traffic going through the + mesh will be sent using multiple interfaces at the + same time (if available). + +What: /sys/class/net/<mesh_iface>/mesh/fragmentation +Date: October 2010 +Contact: Andreas Langer <an.langer@gmx.de> +Description: + Indicates whether the data traffic going through the + mesh will be fragmented or silently discarded if the + packet size exceeds the outgoing interface MTU. + +What: /sys/class/net/<mesh_iface>/mesh/gw_bandwidth +Date: October 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Defines the bandwidth which is propagated by this + node if gw_mode was set to 'server'. + +What: /sys/class/net/<mesh_iface>/mesh/gw_mode +Date: October 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Defines the state of the gateway features. Can be + either 'off', 'client' or 'server'. + +What: /sys/class/net/<mesh_iface>/mesh/gw_sel_class +Date: October 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Defines the selection criteria this node will use + to choose a gateway if gw_mode was set to 'client'. + +What: /sys/class/net/<mesh_iface>/mesh/orig_interval +Date: May 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Defines the interval in milliseconds in which batman + sends its protocol messages. + +What: /sys/class/net/<mesh_iface>/mesh/hop_penalty +Date: Oct 2010 +Contact: Linus Lüssing <linus.luessing@web.de> +Description: + Defines the penalty which will be applied to an + originator message's tq-field on every hop. + +What: /sys/class/net/<mesh_iface>/mesh/vis_mode +Date: May 2010 +Contact: Marek Lindner <lindner_marek@yahoo.de> +Description: + Each batman node only maintains information about its + own local neighborhood, therefore generating graphs + showing the topology of the entire mesh is not easily + feasible without having a central instance to collect + the local topologies from all nodes. This file allows + to activate the collecting (server) mode. diff --git a/Documentation/DocBook/80211.tmpl b/Documentation/DocBook/80211.tmpl index 19a1210c253..03641a08e27 100644 --- a/Documentation/DocBook/80211.tmpl +++ b/Documentation/DocBook/80211.tmpl @@ -146,6 +146,7 @@ !Finclude/net/cfg80211.h cfg80211_rx_mgmt !Finclude/net/cfg80211.h cfg80211_mgmt_tx_status !Finclude/net/cfg80211.h cfg80211_cqm_rssi_notify +!Finclude/net/cfg80211.h cfg80211_cqm_pktloss_notify !Finclude/net/cfg80211.h cfg80211_michael_mic_failure </chapter> <chapter> @@ -332,10 +333,16 @@ <title>functions/definitions</title> !Finclude/net/mac80211.h ieee80211_rx_status !Finclude/net/mac80211.h mac80211_rx_flags +!Finclude/net/mac80211.h mac80211_tx_control_flags +!Finclude/net/mac80211.h mac80211_rate_control_flags +!Finclude/net/mac80211.h ieee80211_tx_rate !Finclude/net/mac80211.h ieee80211_tx_info +!Finclude/net/mac80211.h ieee80211_tx_info_clear_status !Finclude/net/mac80211.h ieee80211_rx +!Finclude/net/mac80211.h ieee80211_rx_ni !Finclude/net/mac80211.h ieee80211_rx_irqsafe !Finclude/net/mac80211.h ieee80211_tx_status +!Finclude/net/mac80211.h ieee80211_tx_status_ni !Finclude/net/mac80211.h ieee80211_tx_status_irqsafe !Finclude/net/mac80211.h ieee80211_rts_get !Finclude/net/mac80211.h ieee80211_rts_duration @@ -346,6 +353,7 @@ !Finclude/net/mac80211.h ieee80211_stop_queue !Finclude/net/mac80211.h ieee80211_wake_queues !Finclude/net/mac80211.h ieee80211_stop_queues +!Finclude/net/mac80211.h ieee80211_queue_stopped </sect1> </chapter> @@ -354,6 +362,13 @@ !Pinclude/net/mac80211.h Frame filtering !Finclude/net/mac80211.h ieee80211_filter_flags </chapter> + + <chapter id="workqueue"> + <title>The mac80211 workqueue</title> +!Pinclude/net/mac80211.h mac80211 workqueue +!Finclude/net/mac80211.h ieee80211_queue_work +!Finclude/net/mac80211.h ieee80211_queue_delayed_work + </chapter> </part> <part id="advanced"> @@ -374,6 +389,9 @@ !Finclude/net/mac80211.h set_key_cmd !Finclude/net/mac80211.h ieee80211_key_conf !Finclude/net/mac80211.h ieee80211_key_flags +!Finclude/net/mac80211.h ieee80211_tkip_key_type +!Finclude/net/mac80211.h ieee80211_get_tkip_key +!Finclude/net/mac80211.h ieee80211_key_removed </chapter> <chapter id="powersave"> @@ -417,6 +435,18 @@ supported by mac80211, add notes about supporting hw crypto with it. </para> +!Finclude/net/mac80211.h ieee80211_iterate_active_interfaces +!Finclude/net/mac80211.h ieee80211_iterate_active_interfaces_atomic + </chapter> + + <chapter id="station-handling"> + <title>Station handling</title> + <para>TODO</para> +!Finclude/net/mac80211.h ieee80211_sta +!Finclude/net/mac80211.h sta_notify_cmd +!Finclude/net/mac80211.h ieee80211_find_sta +!Finclude/net/mac80211.h ieee80211_find_sta_by_ifaddr +!Finclude/net/mac80211.h ieee80211_sta_block_awake </chapter> <chapter id="hardware-scan-offload"> @@ -424,6 +454,28 @@ <para>TBD</para> !Finclude/net/mac80211.h ieee80211_scan_completed </chapter> + + <chapter id="aggregation"> + <title>Aggregation</title> + <sect1> + <title>TX A-MPDU aggregation</title> +!Pnet/mac80211/agg-tx.c TX A-MPDU aggregation +!Cnet/mac80211/agg-tx.c + </sect1> + <sect1> + <title>RX A-MPDU aggregation</title> +!Pnet/mac80211/agg-rx.c RX A-MPDU aggregation +!Cnet/mac80211/agg-rx.c + </sect1> +!Finclude/net/mac80211.h ieee80211_ampdu_mlme_action + </chapter> + + <chapter id="smps"> + <title>Spatial Multiplexing Powersave (SMPS)</title> +!Pinclude/net/mac80211.h Spatial multiplexing power save +!Finclude/net/mac80211.h ieee80211_request_smps +!Finclude/net/mac80211.h ieee80211_smps_mode + </chapter> </part> <part id="rate-control"> @@ -435,9 +487,16 @@ interface and how it relates to mac80211 and drivers. </para> </partintro> - <chapter id="dummy"> - <title>dummy chapter</title> + <chapter id="ratecontrol-api"> + <title>Rate Control API</title> <para>TBD</para> +!Finclude/net/mac80211.h ieee80211_start_tx_ba_session +!Finclude/net/mac80211.h ieee80211_start_tx_ba_cb_irqsafe +!Finclude/net/mac80211.h ieee80211_stop_tx_ba_session +!Finclude/net/mac80211.h ieee80211_stop_tx_ba_cb_irqsafe +!Finclude/net/mac80211.h rate_control_changed +!Finclude/net/mac80211.h ieee80211_tx_rate_control +!Finclude/net/mac80211.h rate_control_send_low </chapter> </part> @@ -485,6 +544,13 @@ </sect1> </chapter> + <chapter id="aggregation-internals"> + <title>Aggregation</title> +!Fnet/mac80211/sta_info.h sta_ampdu_mlme +!Fnet/mac80211/sta_info.h tid_ampdu_tx +!Fnet/mac80211/sta_info.h tid_ampdu_rx + </chapter> + <chapter id="synchronisation"> <title>Synchronisation</title> <para>TBD</para> diff --git a/Documentation/DocBook/v4l/func-ioctl.xml b/Documentation/DocBook/v4l/func-ioctl.xml index 00f9690e1c2..b60fd37a629 100644 --- a/Documentation/DocBook/v4l/func-ioctl.xml +++ b/Documentation/DocBook/v4l/func-ioctl.xml @@ -34,8 +34,7 @@ <varlistentry> <term><parameter>request</parameter></term> <listitem> - <para>V4L2 ioctl request code as defined in the <link -linkend="videodev">videodev.h</link> header file, for example + <para>V4L2 ioctl request code as defined in the <filename>videodev2.h</filename> header file, for example VIDIOC_QUERYCAP.</para> </listitem> </varlistentry> @@ -57,7 +56,7 @@ file descriptor. An ioctl <parameter>request</parameter> has encoded in it whether the argument is an input, output or read/write parameter, and the size of the argument <parameter>argp</parameter> in bytes. Macros and defines specifying V4L2 ioctl requests are located -in the <link linkend="videodev">videodev.h</link> header file. +in the <filename>videodev2.h</filename> header file. Applications should use their own copy, not include the version in the kernel sources on the system they compile on. All V4L2 ioctl requests, their respective function and parameters are specified in <xref diff --git a/Documentation/DocBook/v4l/pixfmt.xml b/Documentation/DocBook/v4l/pixfmt.xml index d7c46718709..cfffc88d738 100644 --- a/Documentation/DocBook/v4l/pixfmt.xml +++ b/Documentation/DocBook/v4l/pixfmt.xml @@ -142,8 +142,8 @@ leftmost pixel of the second row from the top, and so on. The last row has just as many pad bytes after it as the other rows.</para> <para>In V4L2 each format has an identifier which looks like -<constant>PIX_FMT_XXX</constant>, defined in the <link -linkend="videodev">videodev.h</link> header file. These identifiers +<constant>PIX_FMT_XXX</constant>, defined in the <filename>videodev2.h</filename> +header file. These identifiers represent <link linkend="v4l2-fourcc">four character codes</link> which are also listed below, however they are not the same as those used in the Windows world.</para> diff --git a/Documentation/Makefile b/Documentation/Makefile index 6fc7ea1d1f9..9b4bc5c76f3 100644 --- a/Documentation/Makefile +++ b/Documentation/Makefile @@ -1,3 +1,3 @@ obj-m := DocBook/ accounting/ auxdisplay/ connector/ \ filesystems/ filesystems/configfs/ ia64/ laptops/ networking/ \ - pcmcia/ spi/ timers/ video4linux/ vm/ watchdog/src/ + pcmcia/ spi/ timers/ vm/ watchdog/src/ diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt index a851118775d..6a8c73f55b8 100644 --- a/Documentation/RCU/trace.txt +++ b/Documentation/RCU/trace.txt @@ -1,18 +1,22 @@ CONFIG_RCU_TRACE debugfs Files and Formats -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. +The rcutree and rcutiny 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. +The following sections describe the debugfs files and formats, first +for rcutree and next for rcutiny. -Hierarchical RCU debugfs Files and Formats +CONFIG_TREE_RCU and CONFIG_TREE_PREEMPT_RCU debugfs Files and Formats -This implementation of RCU provides three debugfs files under the +These implementations of RCU provides five debugfs files under the top-level directory RCU: rcu/rcudata (which displays fields in struct -rcu_data), rcu/rcugp (which displays grace-period counters), and -rcu/rcuhier (which displays the struct rcu_node hierarchy). +rcu_data), rcu/rcudata.csv (which is a .csv spreadsheet version of +rcu/rcudata), rcu/rcugp (which displays grace-period counters), +rcu/rcuhier (which displays the struct rcu_node hierarchy), and +rcu/rcu_pending (which displays counts of the reasons that the +rcu_pending() function decided that there was core RCU work to do). The output of "cat rcu/rcudata" looks as follows: @@ -130,7 +134,8 @@ o "ci" is the number of RCU callbacks that have been invoked for been registered in absence of CPU-hotplug activity. o "co" is the number of RCU callbacks that have been orphaned due to - this CPU going offline. + this CPU going offline. These orphaned callbacks have been moved + to an arbitrarily chosen online CPU. o "ca" is the number of RCU callbacks that have been adopted due to other CPUs going offline. Note that ci+co-ca+ql is the number of @@ -168,12 +173,12 @@ o "gpnum" is the number of grace periods that have started. It is 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 oqlen=0 +c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6 1/1 .>. 0:127 ^0 3/3 .>. 0:35 ^0 0/0 .>. 36:71 ^1 0/0 .>. 72:107 ^2 0/0 .>. 108:127 ^3 3/3f .>. 0:5 ^0 2/3 .>. 6:11 ^1 0/0 .>. 12:17 ^2 0/0 .>. 18:23 ^3 0/0 .>. 24:29 ^4 0/0 .>. 30:35 ^5 0/0 .>. 36:41 ^0 0/0 .>. 42:47 ^1 0/0 .>. 48:53 ^2 0/0 .>. 54:59 ^3 0/0 .>. 60:65 ^4 0/0 .>. 66:71 ^5 0/0 .>. 72:77 ^0 0/0 .>. 78:83 ^1 0/0 .>. 84:89 ^2 0/0 .>. 90:95 ^3 0/0 .>. 96:101 ^4 0/0 .>. 102:107 ^5 0/0 .>. 108:113 ^0 0/0 .>. 114:119 ^1 0/0 .>. 120:125 ^2 0/0 .>. 126:127 ^3 rcu_bh: -c=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0 oqlen=0 +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 @@ -212,11 +217,6 @@ 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 @@ -326,3 +326,115 @@ o "nn" is the number of times that this CPU needed nothing. Alert readers will note that the rcu "nn" number for a given CPU very closely matches the rcu_bh "np" number for that same CPU. This is due to short-circuit evaluation in rcu_pending(). + + +CONFIG_TINY_RCU and CONFIG_TINY_PREEMPT_RCU debugfs Files and Formats + +These implementations of RCU provides a single debugfs file under the +top-level directory RCU, namely rcu/rcudata, which displays fields in +rcu_bh_ctrlblk, rcu_sched_ctrlblk and, for CONFIG_TINY_PREEMPT_RCU, +rcu_preempt_ctrlblk. + +The output of "cat rcu/rcudata" is as follows: + +rcu_preempt: qlen=24 gp=1097669 g197/p197/c197 tasks=... + ttb=. btg=no ntb=184 neb=0 nnb=183 j=01f7 bt=0274 + normal balk: nt=1097669 gt=0 bt=371 b=0 ny=25073378 nos=0 + exp balk: bt=0 nos=0 +rcu_sched: qlen: 0 +rcu_bh: qlen: 0 + +This is split into rcu_preempt, rcu_sched, and rcu_bh sections, with the +rcu_preempt section appearing only in CONFIG_TINY_PREEMPT_RCU builds. +The last three lines of the rcu_preempt section appear only in +CONFIG_RCU_BOOST kernel builds. The fields are as follows: + +o "qlen" is the number of RCU callbacks currently waiting either + for an RCU grace period or waiting to be invoked. This is the + only field present for rcu_sched and rcu_bh, due to the + short-circuiting of grace period in those two cases. + +o "gp" is the number of grace periods that have completed. + +o "g197/p197/c197" displays the grace-period state, with the + "g" number being the number of grace periods that have started + (mod 256), the "p" number being the number of grace periods + that the CPU has responded to (also mod 256), and the "c" + number being the number of grace periods that have completed + (once again mode 256). + + Why have both "gp" and "g"? Because the data flowing into + "gp" is only present in a CONFIG_RCU_TRACE kernel. + +o "tasks" is a set of bits. The first bit is "T" if there are + currently tasks that have recently blocked within an RCU + read-side critical section, the second bit is "N" if any of the + aforementioned tasks are blocking the current RCU grace period, + and the third bit is "E" if any of the aforementioned tasks are + blocking the current expedited grace period. Each bit is "." + if the corresponding condition does not hold. + +o "ttb" is a single bit. It is "B" if any of the blocked tasks + need to be priority boosted and "." otherwise. + +o "btg" indicates whether boosting has been carried out during + the current grace period, with "exp" indicating that boosting + is in progress for an expedited grace period, "no" indicating + that boosting has not yet started for a normal grace period, + "begun" indicating that boosting has bebug for a normal grace + period, and "done" indicating that boosting has completed for + a normal grace period. + +o "ntb" is the total number of tasks subjected to RCU priority boosting + periods since boot. + +o "neb" is the number of expedited grace periods that have had + to resort to RCU priority boosting since boot. + +o "nnb" is the number of normal grace periods that have had + to resort to RCU priority boosting since boot. + +o "j" is the low-order 12 bits of the jiffies counter in hexadecimal. + +o "bt" is the low-order 12 bits of the value that the jiffies counter + will have at the next time that boosting is scheduled to begin. + +o In the line beginning with "normal balk", the fields are as follows: + + o "nt" is the number of times that the system balked from + boosting because there were no blocked tasks to boost. + Note that the system will balk from boosting even if the + grace period is overdue when the currently running task + is looping within an RCU read-side critical section. + There is no point in boosting in this case, because + boosting a running task won't make it run any faster. + + o "gt" is the number of times that the system balked + from boosting because, although there were blocked tasks, + none of them were preventing the current grace period + from completing. + + o "bt" is the number of times that the system balked + from boosting because boosting was already in progress. + + o "b" is the number of times that the system balked from + boosting because boosting had already completed for + the grace period in question. + + o "ny" is the number of times that the system balked from + boosting because it was not yet time to start boosting + the grace period in question. + + o "nos" is the number of times that the system balked from + boosting for inexplicable ("not otherwise specified") + reasons. This can actually happen due to races involving + increments of the jiffies counter. + +o In the line beginning with "exp balk", the fields are as follows: + + o "bt" is the number of times that the system balked from + boosting because there were no blocked tasks to boost. + + o "nos" is the number of times that the system balked from + boosting for inexplicable ("not otherwise specified") + reasons. diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c index a2976a6de03..e9c77788a39 100644 --- a/Documentation/accounting/getdelays.c +++ b/Documentation/accounting/getdelays.c @@ -516,6 +516,7 @@ int main(int argc, char *argv[]) default: fprintf(stderr, "Unknown nla_type %d\n", na->nla_type); + case TASKSTATS_TYPE_NULL: break; } na = (struct nlattr *) (GENLMSG_DATA(&msg) + len); diff --git a/Documentation/arm/00-INDEX b/Documentation/arm/00-INDEX index ecf7d04bca2..91c24a1e8a9 100644 --- a/Documentation/arm/00-INDEX +++ b/Documentation/arm/00-INDEX @@ -34,3 +34,5 @@ memory.txt - description of the virtual memory layout nwfpe/ - NWFPE floating point emulator documentation +swp_emulation + - SWP/SWPB emulation handler/logging description diff --git a/Documentation/arm/swp_emulation b/Documentation/arm/swp_emulation new file mode 100644 index 00000000000..af903d22fd9 --- /dev/null +++ b/Documentation/arm/swp_emulation @@ -0,0 +1,27 @@ +Software emulation of deprecated SWP instruction (CONFIG_SWP_EMULATE) +--------------------------------------------------------------------- + +ARMv6 architecture deprecates use of the SWP/SWPB instructions, and recommeds +moving to the load-locked/store-conditional instructions LDREX and STREX. + +ARMv7 multiprocessing extensions introduce the ability to disable these +instructions, triggering an undefined instruction exception when executed. +Trapped instructions are emulated using an LDREX/STREX or LDREXB/STREXB +sequence. If a memory access fault (an abort) occurs, a segmentation fault is +signalled to the triggering process. + +/proc/cpu/swp_emulation holds some statistics/information, including the PID of +the last process to trigger the emulation to be invocated. For example: +--- +Emulated SWP: 12 +Emulated SWPB: 0 +Aborted SWP{B}: 1 +Last process: 314 +--- + +NOTE: when accessing uncached shared regions, LDREX/STREX rely on an external +transaction monitoring block called a global monitor to maintain update +atomicity. If your system does not implement a global monitor, this option can +cause programs that perform SWP operations to uncached memory to deadlock, as +the STREX operation will always fail. + diff --git a/Documentation/dontdiff b/Documentation/dontdiff index d9bcffd5943..470d3dba1a6 100644 --- a/Documentation/dontdiff +++ b/Documentation/dontdiff @@ -62,6 +62,10 @@ aic7*reg_print.c* aic7*seq.h* aicasm aicdb.h* +altivec1.c +altivec2.c +altivec4.c +altivec8.c asm-offsets.h asm_offsets.h autoconf.h* @@ -76,6 +80,7 @@ btfixupprep build bvmlinux bzImage* +capflags.c classlist.h* comp*.log compile.h* @@ -94,6 +99,7 @@ devlist.h* docproc elf2ecoff elfconfig.h* +evergreen_reg_safe.h fixdep flask.h fore200e_mkfirm @@ -108,9 +114,16 @@ genksyms *_gray256.c ihex2fw ikconfig.h* +inat-tables.c initramfs_data.cpio initramfs_data.cpio.gz initramfs_list +int16.c +int1.c +int2.c +int32.c +int4.c +int8.c kallsyms kconfig keywords.c @@ -140,6 +153,7 @@ mkprep mktables mktree modpost +modules.builtin modules.order modversions.h* ncscope.* @@ -153,14 +167,23 @@ pca200e.bin pca200e_ecd.bin2 piggy.gz piggyback +piggy.S pnmtologo ppc_defs.h* pss_boot.h qconf +r100_reg_safe.h +r200_reg_safe.h +r300_reg_safe.h +r420_reg_safe.h +r600_reg_safe.h raid6altivec*.c raid6int*.c raid6tables.c relocs +rn50_reg_safe.h +rs600_reg_safe.h +rv515_reg_safe.h series setup setup.bin @@ -169,6 +192,7 @@ sImage sm_tbl* split-include syscalltab.h +tables.c tags tftpboot.img timeconst.h @@ -190,6 +214,7 @@ vmlinux vmlinux-* vmlinux.aout vmlinux.lds +voffset.h vsyscall.lds vsyscall_32.lds wanxlfw.inc @@ -200,3 +225,4 @@ wakeup.elf wakeup.lds zImage* zconf.hash.c +zoffset.h diff --git a/Documentation/dvb/lmedm04.txt b/Documentation/dvb/lmedm04.txt index e175784b89b..64188650420 100644 --- a/Documentation/dvb/lmedm04.txt +++ b/Documentation/dvb/lmedm04.txt @@ -46,7 +46,7 @@ and run Other LG firmware can be extracted manually from US280D.sys only found in windows/system32/driver. -dd if=US280D.sys ibs=1 skip=42616 count=3668 of=dvb-usb-lme2510-lg.fw +dd if=US280D.sys ibs=1 skip=42360 count=3924 of=dvb-usb-lme2510-lg.fw for DM04 LME2510C (LG Tuner) --------------------------- diff --git a/Documentation/fb/udlfb.txt b/Documentation/fb/udlfb.txt new file mode 100644 index 00000000000..7fdde2a02a2 --- /dev/null +++ b/Documentation/fb/udlfb.txt @@ -0,0 +1,144 @@ + +What is udlfb? +=============== + +This is a driver for DisplayLink USB 2.0 era graphics chips. + +DisplayLink chips provide simple hline/blit operations with some compression, +pairing that with a hardware framebuffer (16MB) on the other end of the +USB wire. That hardware framebuffer is able to drive the VGA, DVI, or HDMI +monitor with no CPU involvement until a pixel has to change. + +The CPU or other local resource does all the rendering; optinally compares the +result with a local shadow of the remote hardware framebuffer to identify +the minimal set of pixels that have changed; and compresses and sends those +pixels line-by-line via USB bulk transfers. + +Because of the efficiency of bulk transfers and a protocol on top that +does not require any acks - the effect is very low latency that +can support surprisingly high resolutions with good performance for +non-gaming and non-video applications. + +Mode setting, EDID read, etc are other bulk or control transfers. Mode +setting is very flexible - able to set nearly arbitrary modes from any timing. + +Advantages of USB graphics in general: + + * Ability to add a nearly arbitrary number of displays to any USB 2.0 + capable system. On Linux, number of displays is limited by fbdev interface + (FB_MAX is currently 32). Of course, all USB devices on the same + host controller share the same 480Mbs USB 2.0 interface. + +Advantages of supporting DisplayLink chips with kernel framebuffer interface: + + * The actual hardware functionality of DisplayLink chips matches nearly + one-to-one with the fbdev interface, making the driver quite small and + tight relative to the functionality it provides. + * X servers and other applications can use the standard fbdev interface + from user mode to talk to the device, without needing to know anything + about USB or DisplayLink's protocol at all. A "displaylink" X driver + and a slightly modified "fbdev" X driver are among those that already do. + +Disadvantages: + + * Fbdev's mmap interface assumes a real hardware framebuffer is mapped. + In the case of USB graphics, it is just an allocated (virtual) buffer. + Writes need to be detected and encoded into USB bulk transfers by the CPU. + Accurate damage/changed area notifications work around this problem. + In the future, hopefully fbdev will be enhanced with an small standard + interface to allow mmap clients to report damage, for the benefit + of virtual or remote framebuffers. + * Fbdev does not arbitrate client ownership of the framebuffer well. + * Fbcon assumes the first framebuffer it finds should be consumed for console. + * It's not clear what the future of fbdev is, given the rise of KMS/DRM. + +How to use it? +============== + +Udlfb, when loaded as a module, will match against all USB 2.0 generation +DisplayLink chips (Alex and Ollie family). It will then attempt to read the EDID +of the monitor, and set the best common mode between the DisplayLink device +and the monitor's capabilities. + +If the DisplayLink device is successful, it will paint a "green screen" which +means that from a hardware and fbdev software perspective, everything is good. + +At that point, a /dev/fb? interface will be present for user-mode applications +to open and begin writing to the framebuffer of the DisplayLink device using +standard fbdev calls. Note that if mmap() is used, by default the user mode +application must send down damage notifcations to trigger repaints of the +changed regions. Alternatively, udlfb can be recompiled with experimental +defio support enabled, to support a page-fault based detection mechanism +that can work without explicit notifcation. + +The most common client of udlfb is xf86-video-displaylink or a modified +xf86-video-fbdev X server. These servers have no real DisplayLink specific +code. They write to the standard framebuffer interface and rely on udlfb +to do its thing. The one extra feature they have is the ability to report +rectangles from the X DAMAGE protocol extension down to udlfb via udlfb's +damage interface (which will hopefully be standardized for all virtual +framebuffers that need damage info). These damage notifications allow +udlfb to efficiently process the changed pixels. + +Module Options +============== + +Special configuration for udlfb is usually unnecessary. There are a few +options, however. + +From the command line, pass options to modprobe +modprobe udlfb defio=1 console=1 + +Or for permanent option, create file like /etc/modprobe.d/options with text +options udlfb defio=1 console=1 + +Accepted options: + +fb_defio Make use of the fb_defio (CONFIG_FB_DEFERRED_IO) kernel + module to track changed areas of the framebuffer by page faults. + Standard fbdev applications that use mmap but that do not + report damage, may be able to work with this enabled. + Disabled by default because of overhead and other issues. + +console Allow fbcon to attach to udlfb provided framebuffers. This + is disabled by default because fbcon will aggressively consume + the first framebuffer it finds, which isn't usually what the + user wants in the case of USB displays. + +Sysfs Attributes +================ + +Udlfb creates several files in /sys/class/graphics/fb? +Where ? is the sequential framebuffer id of the particular DisplayLink device + +edid If a valid EDID blob is written to this file (typically + by a udev rule), then udlfb will use this EDID as a + backup in case reading the actual EDID of the monitor + attached to the DisplayLink device fails. This is + especially useful for fixed panels, etc. that cannot + communicate their capabilities via EDID. Reading + this file returns the current EDID of the attached + monitor (or last backup value written). This is + useful to get the EDID of the attached monitor, + which can be passed to utilities like parse-edid. + +metrics_bytes_rendered 32-bit count of pixel bytes rendered + +metrics_bytes_identical 32-bit count of how many of those bytes were found to be + unchanged, based on a shadow framebuffer check + +metrics_bytes_sent 32-bit count of how many bytes were transferred over + USB to communicate the resulting changed pixels to the + hardware. Includes compression and protocol overhead + +metrics_cpu_kcycles_used 32-bit count of CPU cycles used in processing the + above pixels (in thousands of cycles). + +metrics_reset Write-only. Any write to this file resets all metrics + above to zero. Note that the 32-bit counters above + roll over very quickly. To get reliable results, design + performance tests to start and finish in a very short + period of time (one minute or less is safe). + +-- +Bernie Thompson <bernie@plugable.com> diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 6c2f55e05f1..f2742e115b0 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -97,36 +97,38 @@ Who: Pavel Machek <pavel@ucw.cz> --------------------------- -What: Video4Linux API 1 ioctls and from Video devices. -When: kernel 2.6.38 -Files: include/linux/videodev.h -Check: include/linux/videodev.h -Why: V4L1 AP1 was replaced by V4L2 API during migration from 2.4 to 2.6 - series. The old API have lots of drawbacks and don't provide enough - means to work with all video and audio standards. The newer API is - already available on the main drivers and should be used instead. - Newer drivers should use v4l_compat_translate_ioctl function to handle - old calls, replacing to newer ones. - Decoder iocts are using internally to allow video drivers to - communicate with video decoders. This should also be improved to allow - V4L2 calls being translated into compatible internal ioctls. - Compatibility ioctls will be provided, for a while, via - v4l1-compat module. -Who: Mauro Carvalho Chehab <mchehab@infradead.org> - ---------------------------- - What: Video4Linux obsolete drivers using V4L1 API -When: kernel 2.6.38 -Files: drivers/staging/cpia/* drivers/staging/stradis/* -Check: drivers/staging/cpia/cpia.c drivers/staging/stradis/stradis.c +When: kernel 2.6.39 +Files: drivers/staging/se401/* drivers/staging/usbvideo/* +Check: drivers/staging/se401/se401.c drivers/staging/usbvideo/usbvideo.c Why: There are some drivers still using V4L1 API, despite all efforts we've done to migrate. Those drivers are for obsolete hardware that the old maintainer didn't care (or not have the hardware anymore), and that no other developer could find any hardware to buy. They probably have no practical usage today, and people with such old hardware could probably keep using an older version - of the kernel. Those drivers will be moved to staging on 2.6.37 and, if nobody - care enough to port and test them with V4L2 API, they'll be removed on 2.6.38. + of the kernel. Those drivers will be moved to staging on 2.6.38 and, if nobody + cares enough to port and test them with V4L2 API, they'll be removed on 2.6.39. +Who: Mauro Carvalho Chehab <mchehab@infradead.org> + +--------------------------- + +What: Video4Linux: Remove obsolete ioctl's +When: kernel 2.6.39 +Files: include/media/videodev2.h +Why: Some ioctl's were defined wrong on 2.6.2 and 2.6.6, using the wrong + type of R/W arguments. They were fixed, but the old ioctl names are + still there, maintained to avoid breaking binary compatibility: + #define VIDIOC_OVERLAY_OLD _IOWR('V', 14, int) + #define VIDIOC_S_PARM_OLD _IOW('V', 22, struct v4l2_streamparm) + #define VIDIOC_S_CTRL_OLD _IOW('V', 28, struct v4l2_control) + #define VIDIOC_G_AUDIO_OLD _IOWR('V', 33, struct v4l2_audio) + #define VIDIOC_G_AUDOUT_OLD _IOWR('V', 49, struct v4l2_audioout) + #define VIDIOC_CROPCAP_OLD _IOR('V', 58, struct v4l2_cropcap) + There's no sense on preserving those forever, as it is very doubtful + that someone would try to use a such old binary with a modern kernel. + Removing them will allow us to remove some magic done at the V4L ioctl + handler. + Who: Mauro Carvalho Chehab <mchehab@infradead.org> --------------------------- diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index b6426f15b4a..33fa3e5d38f 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -18,7 +18,6 @@ prototypes: char *(*d_dname)((struct dentry *dentry, char *buffer, int buflen); locking rules: - none have BKL dcache_lock rename_lock ->d_lock may block d_revalidate: no no no yes d_hash no no no yes @@ -42,18 +41,23 @@ ata *); int (*rename) (struct inode *, struct dentry *, struct inode *, struct dentry *); int (*readlink) (struct dentry *, char __user *,int); - int (*follow_link) (struct dentry *, struct nameidata *); + void * (*follow_link) (struct dentry *, struct nameidata *); + void (*put_link) (struct dentry *, struct nameidata *, void *); void (*truncate) (struct inode *); int (*permission) (struct inode *, int, struct nameidata *); + int (*check_acl)(struct inode *, int); int (*setattr) (struct dentry *, struct iattr *); int (*getattr) (struct vfsmount *, struct dentry *, struct kstat *); int (*setxattr) (struct dentry *, const char *,const void *,size_t,int); ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t); ssize_t (*listxattr) (struct dentry *, char *, size_t); int (*removexattr) (struct dentry *, const char *); + void (*truncate_range)(struct inode *, loff_t, loff_t); + long (*fallocate)(struct inode *inode, int mode, loff_t offset, loff_t len); + int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len); locking rules: - all may block, none have BKL + all may block i_mutex(inode) lookup: yes create: yes @@ -66,19 +70,24 @@ rmdir: yes (both) (see below) rename: yes (all) (see below) readlink: no follow_link: no +put_link: no truncate: yes (see below) setattr: yes permission: no +check_acl: no getattr: no setxattr: yes getxattr: no listxattr: no removexattr: yes +truncate_range: yes +fallocate: no +fiemap: no Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on victim. cross-directory ->rename() has (per-superblock) ->s_vfs_rename_sem. ->truncate() is never called directly - it's a callback, not a -method. It's called by vmtruncate() - library function normally used by +method. It's called by vmtruncate() - deprecated library function used by ->setattr(). Locking information above applies to that call (i.e. is inherited from ->setattr() - vmtruncate() is used when ATTR_SIZE had been passed). @@ -91,7 +100,7 @@ prototypes: struct inode *(*alloc_inode)(struct super_block *sb); void (*destroy_inode)(struct inode *); void (*dirty_inode) (struct inode *); - int (*write_inode) (struct inode *, int); + int (*write_inode) (struct inode *, struct writeback_control *wbc); int (*drop_inode) (struct inode *); void (*evict_inode) (struct inode *); void (*put_super) (struct super_block *); @@ -105,10 +114,10 @@ prototypes: int (*show_options)(struct seq_file *, struct vfsmount *); ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t); ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t); + int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t); locking rules: All may block [not true, see below] - None have BKL s_umount alloc_inode: destroy_inode: @@ -127,6 +136,7 @@ umount_begin: no show_options: no (namespace_sem) quota_read: no (see below) quota_write: no (see below) +bdev_try_to_free_page: no (see below) ->statfs() has s_umount (shared) when called by ustat(2) (native or compat), but that's an accident of bad API; s_umount is used to pin @@ -139,19 +149,25 @@ be the only ones operating on the quota file by the quota code (via dqio_sem) (unless an admin really wants to screw up something and writes to quota files with quotas on). For other details about locking see also dquot_operations section. +->bdev_try_to_free_page is called from the ->releasepage handler of +the block device inode. See there for more details. --------------------------- file_system_type --------------------------- prototypes: int (*get_sb) (struct file_system_type *, int, const char *, void *, struct vfsmount *); + struct dentry *(*mount) (struct file_system_type *, int, + const char *, void *); void (*kill_sb) (struct super_block *); locking rules: - may block BKL -get_sb yes no -kill_sb yes no + may block +get_sb yes +mount yes +kill_sb yes ->get_sb() returns error or 0 with locked superblock attached to the vfsmount (exclusive on ->s_umount). +->mount() returns ERR_PTR or the root dentry. ->kill_sb() takes a write-locked superblock, does all shutdown work on it, unlocks and drops the reference. @@ -176,27 +192,35 @@ prototypes: void (*freepage)(struct page *); int (*direct_IO)(int, struct kiocb *, const struct iovec *iov, loff_t offset, unsigned long nr_segs); - int (*launder_page) (struct page *); + int (*get_xip_mem)(struct address_space *, pgoff_t, int, void **, + unsigned long *); + int (*migratepage)(struct address_space *, struct page *, struct page *); + int (*launder_page)(struct page *); + int (*is_partially_uptodate)(struct page *, read_descriptor_t *, unsigned long); + int (*error_remove_page)(struct address_space *, struct page *); locking rules: All except set_page_dirty and freepage may block - BKL PageLocked(page) i_mutex -writepage: no yes, unlocks (see below) -readpage: no yes, unlocks -sync_page: no maybe -writepages: no -set_page_dirty no no -readpages: no -write_begin: no locks the page yes -write_end: no yes, unlocks yes -perform_write: no n/a yes -bmap: no -invalidatepage: no yes -releasepage: no yes -freepage: no yes -direct_IO: no -launder_page: no yes + PageLocked(page) i_mutex +writepage: yes, unlocks (see below) +readpage: yes, unlocks +sync_page: maybe +writepages: +set_page_dirty no +readpages: +write_begin: locks the page yes +write_end: yes, unlocks yes +bmap: +invalidatepage: yes +releasepage: yes +freepage: yes +direct_IO: +get_xip_mem: maybe +migratepage: yes (both) +launder_page: yes +is_partially_uptodate: yes +error_remove_page: yes ->write_begin(), ->write_end(), ->sync_page() and ->readpage() may be called from the request handler (/dev/loop). @@ -276,9 +300,8 @@ under spinlock (it cannot block) and is sometimes called with the page not locked. ->bmap() is currently used by legacy ioctl() (FIBMAP) provided by some -filesystems and by the swapper. The latter will eventually go away. All -instances do not actually need the BKL. Please, keep it that way and don't -breed new callers. +filesystems and by the swapper. The latter will eventually go away. Please, +keep it that way and don't breed new callers. ->invalidatepage() is called when the filesystem must attempt to drop some or all of the buffers from the page when it is being truncated. It @@ -299,47 +322,37 @@ cleaned, or an error value if not. Note that in order to prevent the page getting mapped back in and redirtied, it needs to be kept locked across the entire operation. - Note: currently almost all instances of address_space methods are -using BKL for internal serialization and that's one of the worst sources -of contention. Normally they are calling library functions (in fs/buffer.c) -and pass foo_get_block() as a callback (on local block-based filesystems, -indeed). BKL is not needed for library stuff and is usually taken by -foo_get_block(). It's an overkill, since block bitmaps can be protected by -internal fs locking and real critical areas are much smaller than the areas -filesystems protect now. - ----------------------- file_lock_operations ------------------------------ prototypes: - void (*fl_insert)(struct file_lock *); /* lock insertion callback */ - void (*fl_remove)(struct file_lock *); /* lock removal callback */ void (*fl_copy_lock)(struct file_lock *, struct file_lock *); void (*fl_release_private)(struct file_lock *); locking rules: - BKL may block -fl_insert: yes no -fl_remove: yes no -fl_copy_lock: yes no -fl_release_private: yes yes + file_lock_lock may block +fl_copy_lock: yes no +fl_release_private: maybe no ----------------------- lock_manager_operations --------------------------- prototypes: int (*fl_compare_owner)(struct file_lock *, struct file_lock *); void (*fl_notify)(struct file_lock *); /* unblock callback */ + int (*fl_grant)(struct file_lock *, struct file_lock *, int); void (*fl_release_private)(struct file_lock *); void (*fl_break)(struct file_lock *); /* break_lease callback */ + int (*fl_mylease)(struct file_lock *, struct file_lock *); + int (*fl_change)(struct file_lock **, int); locking rules: - BKL may block -fl_compare_owner: yes no -fl_notify: yes no -fl_release_private: yes yes -fl_break: yes no - - Currently only NFSD and NLM provide instances of this class. None of the -them block. If you have out-of-tree instances - please, show up. Locking -in that area will change. + file_lock_lock may block +fl_compare_owner: yes no +fl_notify: yes no +fl_grant: no no +fl_release_private: maybe no +fl_break: yes no +fl_mylease: yes no +fl_change yes no + --------------------------- buffer_head ----------------------------------- prototypes: void (*b_end_io)(struct buffer_head *bh, int uptodate); @@ -364,17 +377,17 @@ prototypes: void (*swap_slot_free_notify) (struct block_device *, unsigned long); locking rules: - BKL bd_mutex -open: no yes -release: no yes -ioctl: no no -compat_ioctl: no no -direct_access: no no -media_changed: no no -unlock_native_capacity: no no -revalidate_disk: no no -getgeo: no no -swap_slot_free_notify: no no (see below) + bd_mutex +open: yes +release: yes +ioctl: no +compat_ioctl: no +direct_access: no +media_changed: no +unlock_native_capacity: no +revalidate_disk: no +getgeo: no +swap_slot_free_notify: no (see below) media_changed, unlock_native_capacity and revalidate_disk are called only from check_disk_change(). @@ -413,34 +426,21 @@ prototypes: unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long); int (*check_flags)(int); + int (*flock) (struct file *, int, struct file_lock *); + ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, + size_t, unsigned int); + ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, + size_t, unsigned int); + int (*setlease)(struct file *, long, struct file_lock **); }; locking rules: - All may block. - BKL -llseek: no (see below) -read: no -aio_read: no -write: no -aio_write: no -readdir: no -poll: no -unlocked_ioctl: no -compat_ioctl: no -mmap: no -open: no -flush: no -release: no -fsync: no (see below) -aio_fsync: no -fasync: no -lock: yes -readv: no -writev: no -sendfile: no -sendpage: no -get_unmapped_area: no -check_flags: no + All may block except for ->setlease. + No VFS locks held on entry except for ->fsync and ->setlease. + +->fsync() has i_mutex on inode. + +->setlease has the file_list_lock held and must not sleep. ->llseek() locking has moved from llseek to the individual llseek implementations. If your fs is not using generic_file_llseek, you @@ -450,17 +450,10 @@ mutex or just to use i_size_read() instead. Note: this does not protect the file->f_pos against concurrent modifications since this is something the userspace has to take care about. -Note: ext2_release() was *the* source of contention on fs-intensive -loads and dropping BKL on ->release() helps to get rid of that (we still -grab BKL for cases when we close a file that had been opened r/w, but that -can and should be done using the internal locking with smaller critical areas). -Current worst offender is ext2_get_block()... - -->fasync() is called without BKL protection, and is responsible for -maintaining the FASYNC bit in filp->f_flags. Most instances call -fasync_helper(), which does that maintenance, so it's not normally -something one needs to worry about. Return values > 0 will be mapped to -zero in the VFS layer. +->fasync() is responsible for maintaining the FASYNC bit in filp->f_flags. +Most instances call fasync_helper(), which does that maintenance, so it's +not normally something one needs to worry about. Return values > 0 will be +mapped to zero in the VFS layer. ->readdir() and ->ioctl() on directories must be changed. Ideally we would move ->readdir() to inode_operations and use a separate method for directory @@ -471,8 +464,6 @@ components. And there are other reasons why the current interface is a mess... ->read on directories probably must go away - we should just enforce -EISDIR in sys_read() and friends. -->fsync() has i_mutex on inode. - --------------------------- dquot_operations ------------------------------- prototypes: int (*write_dquot) (struct dquot *); @@ -507,12 +498,12 @@ prototypes: int (*access)(struct vm_area_struct *, unsigned long, void*, int, int); locking rules: - BKL mmap_sem PageLocked(page) -open: no yes -close: no yes -fault: no yes can return with page locked -page_mkwrite: no yes can return with page locked -access: no yes + mmap_sem PageLocked(page) +open: yes +close: yes +fault: yes can return with page locked +page_mkwrite: yes can return with page locked +access: yes ->fault() is called when a previously not present pte is about to be faulted in. The filesystem must find and return the page associated @@ -539,6 +530,3 @@ VM_IO | VM_PFNMAP VMAs. (if you break something or notice that it is broken and do not fix it yourself - at least put it here) - -ipc/shm.c::shm_delete() - may need BKL. -->read() and ->write() in many drivers are (probably) missing BKL. diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt index 63ffd78824d..d6a63c7b447 100644 --- a/Documentation/ioctl/ioctl-number.txt +++ b/Documentation/ioctl/ioctl-number.txt @@ -155,7 +155,6 @@ Code Seq#(hex) Include File Comments 'Q' all linux/soundcard.h 'R' 00-1F linux/random.h conflict! 'R' 01 linux/rfkill.h conflict! -'R' 01-0F media/rds.h conflict! 'R' C0-DF net/bluetooth/rfcomm.h 'S' all linux/cdrom.h conflict! 'S' 80-81 scsi/scsi_ioctl.h conflict! @@ -194,7 +193,6 @@ Code Seq#(hex) Include File Comments <http://lrcwww.epfl.ch/> 'b' 00-FF conflict! bit3 vme host bridge <mailto:natalia@nikhefk.nikhef.nl> -'b' 00-0F media/bt819.h conflict! 'c' all linux/cm4000_cs.h conflict! 'c' 00-7F linux/comstats.h conflict! 'c' 00-7F linux/coda.h conflict! @@ -260,14 +258,11 @@ Code Seq#(hex) Include File Comments 't' 80-8F linux/isdn_ppp.h 't' 90 linux/toshiba.h 'u' 00-1F linux/smb_fs.h gone -'v' all linux/videodev.h conflict! 'v' 00-1F linux/ext2_fs.h conflict! 'v' 00-1F linux/fs.h conflict! 'v' 00-0F linux/sonypi.h conflict! -'v' C0-CF drivers/media/video/ov511.h conflict! 'v' C0-DF media/pwc-ioctl.h conflict! 'v' C0-FF linux/meye.h conflict! -'v' C0-CF drivers/media/video/zoran/zoran.h conflict! 'v' D0-DF drivers/media/video/cpia2/cpia2dev.h conflict! 'w' all CERN SCI driver 'y' 00-1F packet based user level communications @@ -278,7 +273,6 @@ Code Seq#(hex) Include File Comments <mailto:oe@port.de> 'z' 10-4F drivers/s390/crypto/zcrypt_api.h conflict! 0x80 00-1F linux/fb.h -0x88 00-3F media/ovcamchip.h 0x89 00-06 arch/x86/include/asm/sockios.h 0x89 0B-DF linux/sockios.h 0x89 E0-EF linux/sockios.h SIOCPROTOPRIVATE range diff --git a/Documentation/kernel-docs.txt b/Documentation/kernel-docs.txt index 715eaaf1519..9a8674629a0 100644 --- a/Documentation/kernel-docs.txt +++ b/Documentation/kernel-docs.txt @@ -537,7 +537,7 @@ Notes: Further information in http://www.oreilly.com/catalog/linuxdrive2/ - * Title: "Linux Device Drivers, 3nd Edition" + * Title: "Linux Device Drivers, 3rd Edition" Authors: Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman Publisher: O'Reilly & Associates. Date: 2005. @@ -592,14 +592,6 @@ Pages: 600. ISBN: 0-13-101908-2 - * Title: "The Design and Implementation of the 4.4 BSD UNIX - Operating System" - Author: Marshall Kirk McKusick, Keith Bostic, Michael J. Karels, - John S. Quarterman. - Publisher: Addison-Wesley. - Date: 1996. - ISBN: 0-201-54979-4 - * Title: "Programming for the real world - POSIX.4" Author: Bill O. Gallmeister. Publisher: O'Reilly & Associates, Inc.. @@ -610,28 +602,13 @@ POSIX. Good reference. * Title: "UNIX Systems for Modern Architectures: Symmetric - Multiprocesssing and Caching for Kernel Programmers" + Multiprocessing and Caching for Kernel Programmers" Author: Curt Schimmel. Publisher: Addison Wesley. Date: June, 1994. Pages: 432. ISBN: 0-201-63338-8 - * Title: "The Design and Implementation of the 4.3 BSD UNIX - Operating System" - Author: Samuel J. Leffler, Marshall Kirk McKusick, Michael J. - Karels, John S. Quarterman. - Publisher: Addison-Wesley. - Date: 1989 (reprinted with corrections on October, 1990). - ISBN: 0-201-06196-1 - - * Title: "The Design of the UNIX Operating System" - Author: Maurice J. Bach. - Publisher: Prentice Hall. - Date: 1986. - Pages: 471. - ISBN: 0-13-201757-1 - MISCELLANEOUS: * Name: linux/Documentation diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 8b61c936099..f3dc951e949 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1579,20 +1579,12 @@ and is between 256 and 4096 characters. It is defined in the file nmi_watchdog= [KNL,BUGS=X86] Debugging features for SMP kernels Format: [panic,][num] - Valid num: 0,1,2 + Valid num: 0 0 - turn nmi_watchdog off - 1 - use the IO-APIC timer for the NMI watchdog - 2 - use the local APIC for the NMI watchdog using - a performance counter. Note: This will use one - performance counter and the local APIC's performance - vector. When panic is specified, panic when an NMI watchdog timeout occurs. This is useful when you use a panic=... timeout and need the box quickly up again. - Instead of 1 and 2 it is possible to use the following - symbolic names: lapic and ioapic - Example: nmi_watchdog=2 or nmi_watchdog=panic,lapic netpoll.carrier_timeout= [NET] Specifies amount of time (in seconds) that @@ -1622,6 +1614,8 @@ and is between 256 and 4096 characters. It is defined in the file noapic [SMP,APIC] Tells the kernel to not make use of any IOAPICs that may be present in the system. + noautogroup Disable scheduler automatic task group creation. + nobats [PPC] Do not use BATs for mapping kernel lowmem on "Classic" PPC cores. @@ -1759,7 +1753,7 @@ and is between 256 and 4096 characters. It is defined in the file nousb [USB] Disable the USB subsystem - nowatchdog [KNL] Disable the lockup detector. + nowatchdog [KNL] Disable the lockup detector (NMI watchdog). nowb [ARM] @@ -2467,12 +2461,13 @@ and is between 256 and 4096 characters. It is defined in the file to facilitate early boot debugging. See also Documentation/trace/events.txt - tsc= Disable clocksource-must-verify flag for TSC. + tsc= Disable clocksource stability checks for TSC. Format: <string> [x86] reliable: mark tsc clocksource as reliable, this - disables clocksource verification at runtime. - Used to enable high-resolution timer mode on older - hardware, and in virtualized environment. + disables clocksource verification at runtime, as well + as the stability checks done at bootup. Used to enable + high-resolution timer mode on older hardware, and in + virtualized environment. [x86] noirqtime: Do not use TSC to do irq accounting. Used to run time disable IRQ_TIME_ACCOUNTING on any platforms where RDTSC is slow and this accounting diff --git a/Documentation/networking/LICENSE.qlcnic b/Documentation/networking/LICENSE.qlcnic new file mode 100644 index 00000000000..29ad4b10642 --- /dev/null +++ b/Documentation/networking/LICENSE.qlcnic @@ -0,0 +1,327 @@ +Copyright (c) 2009-2010 QLogic Corporation +QLogic Linux qlcnic NIC Driver + +This program includes a device driver for Linux 2.6 that may be +distributed with QLogic hardware specific firmware binary file. +You may modify and redistribute the device driver code under the +GNU General Public License (a copy of which is attached hereto as +Exhibit A) published by the Free Software Foundation (version 2). + +You may redistribute the hardware specific firmware binary file +under the following terms: + + 1. Redistribution of source code (only if applicable), + must retain the above copyright notice, this list of + conditions and the following disclaimer. + + 2. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. diff --git a/Documentation/networking/batman-adv.txt b/Documentation/networking/batman-adv.txt new file mode 100644 index 00000000000..77f0cdd5b0d --- /dev/null +++ b/Documentation/networking/batman-adv.txt @@ -0,0 +1,240 @@ +[state: 21-11-2010] + +BATMAN-ADV +---------- + +Batman advanced is a new approach to wireless networking which +does no longer operate on the IP basis. Unlike the batman daemon, +which exchanges information using UDP packets and sets routing +tables, batman-advanced operates on ISO/OSI Layer 2 only and uses +and routes (or better: bridges) Ethernet Frames. It emulates a +virtual network switch of all nodes participating. Therefore all +nodes appear to be link local, thus all higher operating proto- +cols won't be affected by any changes within the network. You can +run almost any protocol above batman advanced, prominent examples +are: IPv4, IPv6, DHCP, IPX. + +Batman advanced was implemented as a Linux kernel driver to re- +duce the overhead to a minimum. It does not depend on any (other) +network driver, and can be used on wifi as well as ethernet lan, +vpn, etc ... (anything with ethernet-style layer 2). + +CONFIGURATION +------------- + +Load the batman-adv module into your kernel: + +# insmod batman-adv.ko + +The module is now waiting for activation. You must add some in- +terfaces on which batman can operate. After loading the module +batman advanced will scan your systems interfaces to search for +compatible interfaces. Once found, it will create subfolders in +the /sys directories of each supported interface, e.g. + +# ls /sys/class/net/eth0/batman_adv/ +# iface_status mesh_iface + +If an interface does not have the "batman_adv" subfolder it prob- +ably is not supported. Not supported interfaces are: loopback, +non-ethernet and batman's own interfaces. + +Note: After the module was loaded it will continuously watch for +new interfaces to verify the compatibility. There is no need to +reload the module if you plug your USB wifi adapter into your ma- +chine after batman advanced was initially loaded. + +To activate a given interface simply write "bat0" into its +"mesh_iface" file inside the batman_adv subfolder: + +# echo bat0 > /sys/class/net/eth0/batman_adv/mesh_iface + +Repeat this step for all interfaces you wish to add. Now batman +starts using/broadcasting on this/these interface(s). + +By reading the "iface_status" file you can check its status: + +# cat /sys/class/net/eth0/batman_adv/iface_status +# active + +To deactivate an interface you have to write "none" into its +"mesh_iface" file: + +# echo none > /sys/class/net/eth0/batman_adv/mesh_iface + + +All mesh wide settings can be found in batman's own interface +folder: + +# ls /sys/class/net/bat0/mesh/ +# aggregated_ogms bonding fragmentation orig_interval +# vis_mode + + +There is a special folder for debugging informations: + +# ls /sys/kernel/debug/batman_adv/bat0/ +# originators socket transtable_global transtable_local +# vis_data + + +Some of the files contain all sort of status information regard- +ing the mesh network. For example, you can view the table of +originators (mesh participants) with: + +# cat /sys/kernel/debug/batman_adv/bat0/originators + +Other files allow to change batman's behaviour to better fit your +requirements. For instance, you can check the current originator +interval (value in milliseconds which determines how often batman +sends its broadcast packets): + +# cat /sys/class/net/bat0/mesh/orig_interval +# 1000 + +and also change its value: + +# echo 3000 > /sys/class/net/bat0/mesh/orig_interval + +In very mobile scenarios, you might want to adjust the originator +interval to a lower value. This will make the mesh more respon- +sive to topology changes, but will also increase the overhead. + + +USAGE +----- + +To make use of your newly created mesh, batman advanced provides +a new interface "bat0" which you should use from this point on. +All interfaces added to batman advanced are not relevant any +longer because batman handles them for you. Basically, one "hands +over" the data by using the batman interface and batman will make +sure it reaches its destination. + +The "bat0" interface can be used like any other regular inter- +face. It needs an IP address which can be either statically con- +figured or dynamically (by using DHCP or similar services): + +# NodeA: ifconfig bat0 192.168.0.1 +# NodeB: ifconfig bat0 192.168.0.2 +# NodeB: ping 192.168.0.1 + +Note: In order to avoid problems remove all IP addresses previ- +ously assigned to interfaces now used by batman advanced, e.g. + +# ifconfig eth0 0.0.0.0 + + +VISUALIZATION +------------- + +If you want topology visualization, at least one mesh node must +be configured as VIS-server: + +# echo "server" > /sys/class/net/bat0/mesh/vis_mode + +Each node is either configured as "server" or as "client" (de- +fault: "client"). Clients send their topology data to the server +next to them, and server synchronize with other servers. If there +is no server configured (default) within the mesh, no topology +information will be transmitted. With these "synchronizing +servers", there can be 1 or more vis servers sharing the same (or +at least very similar) data. + +When configured as server, you can get a topology snapshot of +your mesh: + +# cat /sys/kernel/debug/batman_adv/bat0/vis_data + +This raw output is intended to be easily parsable and convertable +with other tools. Have a look at the batctl README if you want a +vis output in dot or json format for instance and how those out- +puts could then be visualised in an image. + +The raw format consists of comma separated values per entry where +each entry is giving information about a certain source inter- +face. Each entry can/has to have the following values: +-> "mac" - mac address of an originator's source interface + (each line begins with it) +-> "TQ mac value" - src mac's link quality towards mac address + of a neighbor originator's interface which + is being used for routing +-> "HNA mac" - HNA announced by source mac +-> "PRIMARY" - this is a primary interface +-> "SEC mac" - secondary mac address of source + (requires preceding PRIMARY) + +The TQ value has a range from 4 to 255 with 255 being the best. +The HNA entries are showing which hosts are connected to the mesh +via bat0 or being bridged into the mesh network. The PRIMARY/SEC +values are only applied on primary interfaces + + +LOGGING/DEBUGGING +----------------- + +All error messages, warnings and information messages are sent to +the kernel log. Depending on your operating system distribution +this can be read in one of a number of ways. Try using the com- +mands: dmesg, logread, or looking in the files /var/log/kern.log +or /var/log/syslog. All batman-adv messages are prefixed with +"batman-adv:" So to see just these messages try + +# dmesg | grep batman-adv + +When investigating problems with your mesh network it is some- +times necessary to see more detail debug messages. This must be +enabled when compiling the batman-adv module. When building bat- +man-adv as part of kernel, use "make menuconfig" and enable the +option "B.A.T.M.A.N. debugging". + +Those additional debug messages can be accessed using a special +file in debugfs + +# cat /sys/kernel/debug/batman_adv/bat0/log + +The additional debug output is by default disabled. It can be en- +abled during run time. Following log_levels are defined: + +0 - All debug output disabled +1 - Enable messages related to routing / flooding / broadcasting +2 - Enable route or hna added / changed / deleted +3 - Enable all messages + +The debug output can be changed at runtime using the file +/sys/class/net/bat0/mesh/log_level. e.g. + +# echo 2 > /sys/class/net/bat0/mesh/log_level + +will enable debug messages for when routes or HNAs change. + + +BATCTL +------ + +As batman advanced operates on layer 2 all hosts participating in +the virtual switch are completely transparent for all protocols +above layer 2. Therefore the common diagnosis tools do not work +as expected. To overcome these problems batctl was created. At +the moment the batctl contains ping, traceroute, tcpdump and +interfaces to the kernel module settings. + +For more information, please see the manpage (man batctl). + +batctl is available on http://www.open-mesh.org/ + + +CONTACT +------- + +Please send us comments, experiences, questions, anything :) + +IRC: #batman on irc.freenode.org +Mailing-list: b.a.t.m.a.n@b.a.t.m.a.n@lists.open-mesh.org + (optional subscription at + https://lists.open-mesh.org/mm/listinfo/b.a.t.m.a.n) + +You can also contact the Authors: + +Marek Lindner <lindner_marek@yahoo.de> +Simon Wunderlich <siwu@hrz.tu-chemnitz.de> diff --git a/Documentation/networking/dccp.txt b/Documentation/networking/dccp.txt index 271d524a4c8..b395ca6a49f 100644 --- a/Documentation/networking/dccp.txt +++ b/Documentation/networking/dccp.txt @@ -47,6 +47,26 @@ http://linux-net.osdl.org/index.php/DCCP_Testing#Experimental_DCCP_source_tree Socket options ============== +DCCP_SOCKOPT_QPOLICY_ID sets the dequeuing policy for outgoing packets. It takes +a policy ID as argument and can only be set before the connection (i.e. changes +during an established connection are not supported). Currently, two policies are +defined: the "simple" policy (DCCPQ_POLICY_SIMPLE), which does nothing special, +and a priority-based variant (DCCPQ_POLICY_PRIO). The latter allows to pass an +u32 priority value as ancillary data to sendmsg(), where higher numbers indicate +a higher packet priority (similar to SO_PRIORITY). This ancillary data needs to +be formatted using a cmsg(3) message header filled in as follows: + cmsg->cmsg_level = SOL_DCCP; + cmsg->cmsg_type = DCCP_SCM_PRIORITY; + cmsg->cmsg_len = CMSG_LEN(sizeof(uint32_t)); /* or CMSG_LEN(4) */ + +DCCP_SOCKOPT_QPOLICY_TXQLEN sets the maximum length of the output queue. A zero +value is always interpreted as unbounded queue length. If different from zero, +the interpretation of this parameter depends on the current dequeuing policy +(see above): the "simple" policy will enforce a fixed queue size by returning +EAGAIN, whereas the "prio" policy enforces a fixed queue length by dropping the +lowest-priority packet first. The default value for this parameter is +initialised from /proc/sys/net/dccp/default/tx_qlen. + DCCP_SOCKOPT_SERVICE sets the service. The specification mandates use of service codes (RFC 4340, sec. 8.1.2); if this socket option is not set, the socket will fall back to 0 (which means that no meaningful service code diff --git a/Documentation/networking/e100.txt b/Documentation/networking/e100.txt index 944aa55e79f..162f323a7a1 100644 --- a/Documentation/networking/e100.txt +++ b/Documentation/networking/e100.txt @@ -72,7 +72,7 @@ Tx Descriptors: Number of transmit descriptors. A transmit descriptor is a data ethtool -G eth? tx n, where n is the number of desired tx descriptors. Speed/Duplex: The driver auto-negotiates the link speed and duplex settings by - default. Ethtool can be used as follows to force speed/duplex. + default. The ethtool utility can be used as follows to force speed/duplex. ethtool -s eth? autoneg off speed {10|100} duplex {full|half} @@ -126,30 +126,21 @@ Additional Configurations ------- The driver utilizes the ethtool interface for driver configuration and - diagnostics, as well as displaying statistical information. Ethtool + diagnostics, as well as displaying statistical information. The ethtool version 1.6 or later is required for this functionality. The latest release of ethtool can be found from - http://sourceforge.net/projects/gkernel. - - NOTE: Ethtool 1.6 only supports a limited set of ethtool options. Support - for a more complete ethtool feature set can be enabled by upgrading - ethtool to ethtool-1.8.1. - + http://ftp.kernel.org/pub/software/network/ethtool/ Enabling Wake on LAN* (WoL) --------------------------- - WoL is provided through the Ethtool* utility. Ethtool is included with Red - Hat* 8.0. For other Linux distributions, download and install Ethtool from - the following website: http://sourceforge.net/projects/gkernel. - - For instructions on enabling WoL with Ethtool, refer to the Ethtool man page. + WoL is provided through the ethtool* utility. For instructions on enabling + WoL with ethtool, refer to the ethtool man page. WoL will be enabled on the system during the next shut down or reboot. For this driver version, in order to enable WoL, the e100 driver must be loaded when shutting down or rebooting the system. - NAPI ---- diff --git a/Documentation/networking/e1000.txt b/Documentation/networking/e1000.txt index d9271e74e48..71ca9585567 100644 --- a/Documentation/networking/e1000.txt +++ b/Documentation/networking/e1000.txt @@ -79,7 +79,7 @@ InterruptThrottleRate --------------------- (not supported on Intel(R) 82542, 82543 or 82544-based adapters) Valid Range: 0,1,3,4,100-100000 (0=off, 1=dynamic, 3=dynamic conservative, - 4=simplified balancing) + 4=simplified balancing) Default Value: 3 The driver can limit the amount of interrupts per second that the adapter @@ -124,8 +124,8 @@ InterruptThrottleRate is set to mode 1. In this mode, which operates the same as mode 3, the InterruptThrottleRate will be increased stepwise to 70000 for traffic in class "Lowest latency". -In simplified mode the interrupt rate is based on the ratio of Tx and -Rx traffic. If the bytes per second rate is approximately equal, the +In simplified mode the interrupt rate is based on the ratio of TX and +RX traffic. If the bytes per second rate is approximately equal, the interrupt rate will drop as low as 2000 interrupts per second. If the traffic is mostly transmit or mostly receive, the interrupt rate could be as high as 8000. @@ -245,7 +245,7 @@ NOTE: Depending on the available system resources, the request for a TxDescriptorStep ---------------- Valid Range: 1 (use every Tx Descriptor) - 4 (use every 4th Tx Descriptor) + 4 (use every 4th Tx Descriptor) Default Value: 1 (use every Tx Descriptor) @@ -312,7 +312,7 @@ Valid Range: 0-xxxxxxx (0=off) Default Value: 256 Usage: insmod e1000.ko copybreak=128 -Driver copies all packets below or equaling this size to a fresh Rx +Driver copies all packets below or equaling this size to a fresh RX buffer before handing it up the stack. This parameter is different than other parameters, in that it is a @@ -431,15 +431,15 @@ Additional Configurations Ethtool ------- The driver utilizes the ethtool interface for driver configuration and - diagnostics, as well as displaying statistical information. Ethtool + diagnostics, as well as displaying statistical information. The ethtool version 1.6 or later is required for this functionality. The latest release of ethtool can be found from - http://sourceforge.net/projects/gkernel. + http://ftp.kernel.org/pub/software/network/ethtool/ Enabling Wake on LAN* (WoL) --------------------------- - WoL is configured through the Ethtool* utility. + WoL is configured through the ethtool* utility. WoL will be enabled on the system during the next shut down or reboot. For this driver version, in order to enable WoL, the e1000 driver must be diff --git a/Documentation/networking/e1000e.txt b/Documentation/networking/e1000e.txt index 6aa048badf3..97b5ba942eb 100644 --- a/Documentation/networking/e1000e.txt +++ b/Documentation/networking/e1000e.txt @@ -1,5 +1,5 @@ Linux* Driver for Intel(R) Network Connection -=============================================================== +============================================= Intel Gigabit Linux driver. Copyright(c) 1999 - 2010 Intel Corporation. @@ -61,6 +61,12 @@ per second, even if more packets have come in. This reduces interrupt load on the system and can lower CPU utilization under heavy load, but will increase latency as packets are not processed as quickly. +The default behaviour of the driver previously assumed a static +InterruptThrottleRate value of 8000, providing a good fallback value for +all traffic types, but lacking in small packet performance and latency. +The hardware can handle many more small packets per second however, and +for this reason an adaptive interrupt moderation algorithm was implemented. + The driver has two adaptive modes (setting 1 or 3) in which it dynamically adjusts the InterruptThrottleRate value based on the traffic that it receives. After determining the type of incoming traffic in the last @@ -86,8 +92,8 @@ InterruptThrottleRate is set to mode 1. In this mode, which operates the same as mode 3, the InterruptThrottleRate will be increased stepwise to 70000 for traffic in class "Lowest latency". -In simplified mode the interrupt rate is based on the ratio of Tx and -Rx traffic. If the bytes per second rate is approximately equal the +In simplified mode the interrupt rate is based on the ratio of TX and +RX traffic. If the bytes per second rate is approximately equal, the interrupt rate will drop as low as 2000 interrupts per second. If the traffic is mostly transmit or mostly receive, the interrupt rate could be as high as 8000. @@ -177,7 +183,7 @@ Copybreak Valid Range: 0-xxxxxxx (0=off) Default Value: 256 -Driver copies all packets below or equaling this size to a fresh Rx +Driver copies all packets below or equaling this size to a fresh RX buffer before handing it up the stack. This parameter is different than other parameters, in that it is a @@ -223,17 +229,17 @@ loading or enabling the driver, try disabling this feature. WriteProtectNVM --------------- -Valid Range: 0-1 -Default Value: 1 (enabled) - -Set the hardware to ignore all write/erase cycles to the GbE region in the -ICHx NVM (non-volatile memory). This feature can be disabled by the -WriteProtectNVM module parameter (enabled by default) only after a hardware -reset, but the machine must be power cycled before trying to enable writes. - -Note: the kernel boot option iomem=relaxed may need to be set if the kernel -config option CONFIG_STRICT_DEVMEM=y, if the root user wants to write the -NVM from user space via ethtool. +Valid Range: 0,1 +Default Value: 1 + +If set to 1, configure the hardware to ignore all write/erase cycles to the +GbE region in the ICHx NVM (in order to prevent accidental corruption of the +NVM). This feature can be disabled by setting the parameter to 0 during initial +driver load. +NOTE: The machine must be power cycled (full off/on) when enabling NVM writes +via setting the parameter to zero. Once the NVM has been locked (via the +parameter at 1 when the driver loads) it cannot be unlocked except via power +cycle. Additional Configurations ========================= @@ -259,32 +265,30 @@ Additional Configurations - Some adapters limit Jumbo Frames sized packets to a maximum of 4096 bytes and some adapters do not support Jumbo Frames. - Ethtool ------- The driver utilizes the ethtool interface for driver configuration and diagnostics, as well as displaying statistical information. We - strongly recommend downloading the latest version of Ethtool at: + strongly recommend downloading the latest version of ethtool at: - http://sourceforge.net/projects/gkernel. + http://ftp.kernel.org/pub/software/network/ethtool/ Speed and Duplex ---------------- - Speed and Duplex are configured through the Ethtool* utility. For - instructions, refer to the Ethtool man page. + Speed and Duplex are configured through the ethtool* utility. For + instructions, refer to the ethtool man page. Enabling Wake on LAN* (WoL) --------------------------- - WoL is configured through the Ethtool* utility. For instructions on - enabling WoL with Ethtool, refer to the Ethtool man page. + WoL is configured through the ethtool* utility. For instructions on + enabling WoL with ethtool, refer to the ethtool man page. WoL will be enabled on the system during the next shut down or reboot. For this driver version, in order to enable WoL, the e1000e driver must be loaded when shutting down or rebooting the system. In most cases Wake On LAN is only supported on port A for multiple port - adapters. To verify if a port supports Wake on LAN run ethtool eth<X>. - + adapters. To verify if a port supports Wake on Lan run ethtool eth<X>. Support ======= diff --git a/Documentation/networking/igb.txt b/Documentation/networking/igb.txt index ab2d7183189..98953c0d534 100644 --- a/Documentation/networking/igb.txt +++ b/Documentation/networking/igb.txt @@ -36,6 +36,7 @@ Default Value: 0 This parameter adds support for SR-IOV. It causes the driver to spawn up to max_vfs worth of virtual function. + Additional Configurations ========================= @@ -60,15 +61,16 @@ Additional Configurations Ethtool ------- The driver utilizes the ethtool interface for driver configuration and - diagnostics, as well as displaying statistical information. + diagnostics, as well as displaying statistical information. The latest + version of ethtool can be found at: - http://sourceforge.net/projects/gkernel. + http://ftp.kernel.org/pub/software/network/ethtool/ Enabling Wake on LAN* (WoL) --------------------------- - WoL is configured through the Ethtool* utility. + WoL is configured through the ethtool* utility. - For instructions on enabling WoL with Ethtool, refer to the Ethtool man page. + For instructions on enabling WoL with ethtool, refer to the ethtool man page. WoL will be enabled on the system during the next shut down or reboot. For this driver version, in order to enable WoL, the igb driver must be @@ -91,31 +93,6 @@ Additional Configurations REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not found, the system will fallback to MSI or to Legacy interrupts. - LRO - --- - Large Receive Offload (LRO) is a technique for increasing inbound throughput - of high-bandwidth network connections by reducing CPU overhead. It works by - aggregating multiple incoming packets from a single stream into a larger - buffer before they are passed higher up the networking stack, thus reducing - the number of packets that have to be processed. LRO combines multiple - Ethernet frames into a single receive in the stack, thereby potentially - decreasing CPU utilization for receives. - - NOTE: You need to have inet_lro enabled via either the CONFIG_INET_LRO or - CONFIG_INET_LRO_MODULE kernel config option. Additionally, if - CONFIG_INET_LRO_MODULE is used, the inet_lro module needs to be loaded - before the igb driver. - - You can verify that the driver is using LRO by looking at these counters in - Ethtool: - - lro_aggregated - count of total packets that were combined - lro_flushed - counts the number of packets flushed out of LRO - lro_no_desc - counts the number of times an LRO descriptor was not available - for the LRO packet - - NOTE: IPv6 and UDP are not supported by LRO. - Support ======= diff --git a/Documentation/networking/igbvf.txt b/Documentation/networking/igbvf.txt index 056028138d9..cbfe4ee6553 100644 --- a/Documentation/networking/igbvf.txt +++ b/Documentation/networking/igbvf.txt @@ -58,9 +58,11 @@ Additional Configurations Ethtool ------- The driver utilizes the ethtool interface for driver configuration and - diagnostics, as well as displaying statistical information. + diagnostics, as well as displaying statistical information. The ethtool + version 3.0 or later is required for this functionality, although we + strongly recommend downloading the latest version at: - http://sourceforge.net/projects/gkernel. + http://ftp.kernel.org/pub/software/network/ethtool/ Support ======= diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 3c5e465296e..d99940dcfc4 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -11,7 +11,9 @@ ip_forward - BOOLEAN for routers) ip_default_ttl - INTEGER - default 64 + Default value of TTL field (Time To Live) for outgoing (but not + forwarded) IP packets. Should be between 1 and 255 inclusive. + Default: 64 (as recommended by RFC1700) ip_no_pmtu_disc - BOOLEAN Disable Path MTU Discovery. @@ -708,10 +710,28 @@ igmp_max_memberships - INTEGER Change the maximum number of multicast groups we can subscribe to. Default: 20 -conf/interface/* changes special settings per interface (where "interface" is - the name of your network interface) -conf/all/* is special, changes the settings for all interfaces + Theoretical maximum value is bounded by having to send a membership + report in a single datagram (i.e. the report can't span multiple + datagrams, or risk confusing the switch and leaving groups you don't + intend to). + The number of supported groups 'M' is bounded by the number of group + report entries you can fit into a single datagram of 65535 bytes. + + M = 65536-sizeof (ip header)/(sizeof(Group record)) + + Group records are variable length, with a minimum of 12 bytes. + So net.ipv4.igmp_max_memberships should not be set higher than: + + (65536-24) / 12 = 5459 + + The value 5459 assumes no IP header options, so in practice + this number may be lower. + + conf/interface/* changes special settings per interface (where + "interface" is the name of your network interface) + + conf/all/* is special, changes the settings for all interfaces log_martians - BOOLEAN Log packets with impossible addresses to kernel log. diff --git a/Documentation/networking/ixgb.txt b/Documentation/networking/ixgb.txt index a0d0ffb5e58..e196f16df31 100644 --- a/Documentation/networking/ixgb.txt +++ b/Documentation/networking/ixgb.txt @@ -309,15 +309,15 @@ Additional Configurations Ethtool ------- The driver utilizes the ethtool interface for driver configuration and - diagnostics, as well as displaying statistical information. Ethtool + diagnostics, as well as displaying statistical information. The ethtool version 1.6 or later is required for this functionality. The latest release of ethtool can be found from - http://sourceforge.net/projects/gkernel + http://ftp.kernel.org/pub/software/network/ethtool/ - NOTE: Ethtool 1.6 only supports a limited set of ethtool options. Support - for a more complete ethtool feature set can be enabled by upgrading - to the latest version. + NOTE: The ethtool version 1.6 only supports a limited set of ethtool options. + Support for a more complete ethtool feature set can be enabled by + upgrading to the latest version. NAPI diff --git a/Documentation/networking/ixgbe.txt b/Documentation/networking/ixgbe.txt index eeb68685c78..af77ed3c417 100644 --- a/Documentation/networking/ixgbe.txt +++ b/Documentation/networking/ixgbe.txt @@ -1,107 +1,126 @@ Linux Base Driver for 10 Gigabit PCI Express Intel(R) Network Connection ======================================================================== -March 10, 2009 - +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. Contents ======== -- In This Release - Identifying Your Adapter -- Building and Installation - Additional Configurations +- Performance Tuning +- Known Issues - Support +Identifying Your Adapter +======================== +The driver in this release is compatible with 82598 and 82599-based Intel +Network Connections. -In This Release -=============== +For more information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: -This file describes the ixgbe Linux Base Driver for the 10 Gigabit PCI -Express Intel(R) Network Connection. This driver includes support for -Itanium(R)2-based systems. + http://support.intel.com/support/network/sb/CS-012904.htm -For questions related to hardware requirements, refer to the documentation -supplied with your 10 Gigabit adapter. All hardware requirements listed apply -to use with Linux. +SFP+ Devices with Pluggable Optics +---------------------------------- -The following features are available in this kernel: - - Native VLANs - - Channel Bonding (teaming) - - SNMP - - Generic Receive Offload - - Data Center Bridging +82599-BASED ADAPTERS -Channel Bonding documentation can be found in the Linux kernel source: -/Documentation/networking/bonding.txt +NOTES: If your 82599-based Intel(R) Network Adapter came with Intel optics, or +is an Intel(R) Ethernet Server Adapter X520-2, then it only supports Intel +optics and/or the direct attach cables listed below. -Ethtool, lspci, and ifconfig can be used to display device and driver -specific information. +When 82599-based SFP+ devices are connected back to back, they should be set to +the same Speed setting via ethtool. Results may vary if you mix speed settings. +82598-based adapters support all passive direct attach cables that comply +with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach +cables are not supported. +Supplier Type Part Numbers -Identifying Your Adapter -======================== +SR Modules +Intel DUAL RATE 1G/10G SFP+ SR (bailed) FTLX8571D3BCV-IT +Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDDZ-IN1 +Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDZ-IN2 +LR Modules +Intel DUAL RATE 1G/10G SFP+ LR (bailed) FTLX1471D3BCV-IT +Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDDZ-IN1 +Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDZ-IN2 -This driver supports devices based on the 82598 controller and the 82599 -controller. +The following is a list of 3rd party SFP+ modules and direct attach cables that +have received some testing. Not all modules are applicable to all devices. -For specific information on identifying which adapter you have, please visit: +Supplier Type Part Numbers - http://support.intel.com/support/network/sb/CS-008441.htm +Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL +Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ +Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL +Finisar DUAL RATE 1G/10G SFP+ SR (No Bail) FTLX8571D3QCV-IT +Avago DUAL RATE 1G/10G SFP+ SR (No Bail) AFBR-703SDZ-IN1 +Finisar DUAL RATE 1G/10G SFP+ LR (No Bail) FTLX1471D3QCV-IT +Avago DUAL RATE 1G/10G SFP+ LR (No Bail) AFCT-701SDZ-IN1 +Finistar 1000BASE-T SFP FCLF8522P2BTL +Avago 1000BASE-T SFP ABCU-5710RZ -Building and Installation -========================= +82599-based adapters support all passive and active limiting direct attach +cables that comply with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. -select m for "Intel(R) 10GbE PCI Express adapters support" located at: - Location: - -> Device Drivers - -> Network device support (NETDEVICES [=y]) - -> Ethernet (10000 Mbit) (NETDEV_10000 [=y]) +Laser turns off for SFP+ when ifconfig down +------------------------------------------- +"ifconfig down" turns off the laser for 82599-based SFP+ fiber adapters. +"ifconfig up" turns on the later. -1. make modules & make modules_install -2. Load the module: +82598-BASED ADAPTERS -# modprobe ixgbe +NOTES for 82598-Based Adapters: +- Intel(R) Network Adapters that support removable optical modules only support + their original module type (i.e., the Intel(R) 10 Gigabit SR Dual Port + Express Module only supports SR optical modules). If you plug in a different + type of module, the driver will not load. +- Hot Swapping/hot plugging optical modules is not supported. +- Only single speed, 10 gigabit modules are supported. +- LAN on Motherboard (LOMs) may support DA, SR, or LR modules. Other module + types are not supported. Please see your system documentation for details. - The insmod command can be used if the full - path to the driver module is specified. For example: +The following is a list of 3rd party SFP+ modules and direct attach cables that +have received some testing. Not all modules are applicable to all devices. - insmod /lib/modules/<KERNEL VERSION>/kernel/drivers/net/ixgbe/ixgbe.ko +Supplier Type Part Numbers - With 2.6 based kernels also make sure that older ixgbe drivers are - removed from the kernel, before loading the new module: +Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL +Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ +Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL - rmmod ixgbe; modprobe ixgbe +82598-based adapters support all passive direct attach cables that comply +with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach +cables are not supported. -3. Assign an IP address to the interface by entering the following, where - x is the interface number: - ifconfig ethx <IP_address> +Flow Control +------------ +Ethernet Flow Control (IEEE 802.3x) can be configured with ethtool to enable +receiving and transmitting pause frames for ixgbe. When TX is enabled, PAUSE +frames are generated when the receive packet buffer crosses a predefined +threshold. When rx is enabled, the transmit unit will halt for the time delay +specified when a PAUSE frame is received. -4. Verify that the interface works. Enter the following, where <IP_address> - is the IP address for another machine on the same subnet as the interface - that is being tested: +Flow Control is enabled by default. If you want to disable a flow control +capable link partner, use ethtool: - ping <IP_address> + ethtool -A eth? autoneg off RX off TX off +NOTE: For 82598 backplane cards entering 1 gig mode, flow control default +behavior is changed to off. Flow control in 1 gig mode on these devices can +lead to Tx hangs. Additional Configurations ========================= - Viewing Link Messages - --------------------- - Link messages will not be displayed to the console if the distribution is - restricting system messages. In order to see network driver link messages on - your console, set dmesg to eight by entering the following: - - dmesg -n 8 - - NOTE: This setting is not saved across reboots. - - Jumbo Frames ------------ The driver supports Jumbo Frames for all adapters. Jumbo Frames support is @@ -123,13 +142,8 @@ Additional Configurations other protocols besides TCP. It's also safe to use with configurations that are problematic for LRO, namely bridging and iSCSI. - GRO is enabled by default in the driver. Future versions of ethtool will - support disabling and re-enabling GRO on the fly. - - Data Center Bridging, aka DCB ----------------------------- - DCB is a configuration Quality of Service implementation in hardware. It uses the VLAN priority tag (802.1p) to filter traffic. That means that there are 8 different priorities that traffic can be filtered into. @@ -163,24 +177,71 @@ Additional Configurations http://e1000.sf.net - Ethtool ------- The driver utilizes the ethtool interface for driver configuration and - diagnostics, as well as displaying statistical information. Ethtool - version 3.0 or later is required for this functionality. + diagnostics, as well as displaying statistical information. The latest + ethtool version is required for this functionality. The latest release of ethtool can be found from - http://sourceforge.net/projects/gkernel. + http://ftp.kernel.org/pub/software/network/ethtool/ - - NAPI + FCoE ---- + This release of the ixgbe driver contains new code to enable users to use + Fiber Channel over Ethernet (FCoE) and Data Center Bridging (DCB) + functionality that is supported by the 82598-based hardware. This code has + no default effect on the regular driver operation, and configuring DCB and + FCoE is outside the scope of this driver README. Refer to + http://www.open-fcoe.org/ for FCoE project information and contact + e1000-eedc@lists.sourceforge.net for DCB information. + + MAC and VLAN anti-spoofing feature + ---------------------------------- + When a malicious driver attempts to send a spoofed packet, it is dropped by + the hardware and not transmitted. An interrupt is sent to the PF driver + notifying it of the spoof attempt. + + When a spoofed packet is detected the PF driver will send the following + message to the system log (displayed by the "dmesg" command): + + Spoof event(s) detected on VF (n) + + Where n=the VF that attempted to do the spoofing. + + +Performance Tuning +================== + +An excellent article on performance tuning can be found at: + +http://www.redhat.com/promo/summit/2008/downloads/pdf/Thursday/Mark_Wagner.pdf + + +Known Issues +============ + + Enabling SR-IOV in a 32-bit Microsoft* Windows* Server 2008 Guest OS using + Intel (R) 82576-based GbE or Intel (R) 82599-based 10GbE controller under KVM + ----------------------------------------------------------------------------- + KVM Hypervisor/VMM supports direct assignment of a PCIe device to a VM. This + includes traditional PCIe devices, as well as SR-IOV-capable devices using + Intel 82576-based and 82599-based controllers. + + While direct assignment of a PCIe device or an SR-IOV Virtual Function (VF) + to a Linux-based VM running 2.6.32 or later kernel works fine, there is a + known issue with Microsoft Windows Server 2008 VM that results in a "yellow + bang" error. This problem is within the KVM VMM itself, not the Intel driver, + or the SR-IOV logic of the VMM, but rather that KVM emulates an older CPU + model for the guests, and this older CPU model does not support MSI-X + interrupts, which is a requirement for Intel SR-IOV. - NAPI (Rx polling mode) is supported in the ixgbe driver. NAPI is enabled - by default in the driver. + If you wish to use the Intel 82576 or 82599-based controllers in SR-IOV mode + with KVM and a Microsoft Windows Server 2008 guest try the following + workaround. The workaround is to tell KVM to emulate a different model of CPU + when using qemu to create the KVM guest: - See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI. + "-cpu qemu64,model=13" Support diff --git a/Documentation/networking/ixgbevf.txt b/Documentation/networking/ixgbevf.txt index 21dd5d15b6b..5a91a41fa94 100644 --- a/Documentation/networking/ixgbevf.txt +++ b/Documentation/networking/ixgbevf.txt @@ -35,10 +35,6 @@ Driver ID Guide at: Known Issues/Troubleshooting ============================ - Unloading Physical Function (PF) Driver Causes System Reboots When VM is - Running and VF is Loaded on the VM - ------------------------------------------------------------------------ - Do not unload the PF driver (ixgbe) while VFs are assigned to guests. Support ======= diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt index 7ee770b5ef5..80a7a345490 100644 --- a/Documentation/networking/stmmac.txt +++ b/Documentation/networking/stmmac.txt @@ -7,7 +7,7 @@ This is the driver for the MAC 10/100/1000 on-chip Ethernet controllers (Synopsys IP blocks); it has been fully tested on STLinux platforms. Currently this network device driver is for all STM embedded MAC/GMAC -(7xxx SoCs). +(7xxx SoCs). Other platforms start using it i.e. ARM SPEAr. DWC Ether MAC 10/100/1000 Universal version 3.41a and DWC Ether MAC 10/100 Universal version 4.0 have been used for developing the first code @@ -95,9 +95,14 @@ Several information came from the platform; please refer to the driver's Header file in include/linux directory. struct plat_stmmacenet_data { - int bus_id; - int pbl; - int has_gmac; + int bus_id; + int pbl; + int clk_csr; + int has_gmac; + int enh_desc; + int tx_coe; + int bugged_jumbo; + int pmt; void (*fix_mac_speed)(void *priv, unsigned int speed); void (*bus_setup)(unsigned long ioaddr); #ifdef CONFIG_STM_DRIVERS @@ -114,6 +119,12 @@ Where: registers (on STM platforms); - has_gmac: GMAC core is on board (get it at run-time in the next step); - bus_id: bus identifier. +- tx_coe: core is able to perform the tx csum in HW. +- enh_desc: if sets the MAC will use the enhanced descriptor structure. +- clk_csr: CSR Clock range selection. +- bugged_jumbo: some HWs are not able to perform the csum in HW for + over-sized frames due to limited buffer sizes. Setting this + flag the csum will be done in SW on JUMBO frames. struct plat_stmmacphy_data { int bus_id; @@ -131,13 +142,28 @@ Where: - interface: physical MII interface mode; - phy_reset: hook to reset HW function. +SOURCES: +- Kconfig +- Makefile +- stmmac_main.c: main network device driver; +- stmmac_mdio.c: mdio functions; +- stmmac_ethtool.c: ethtool support; +- stmmac_timer.[ch]: timer code used for mitigating the driver dma interrupts + Only tested on ST40 platforms based. +- stmmac.h: private driver structure; +- common.h: common definitions and VFTs; +- descs.h: descriptor structure definitions; +- dwmac1000_core.c: GMAC core functions; +- dwmac1000_dma.c: dma functions for the GMAC chip; +- dwmac1000.h: specific header file for the GMAC; +- dwmac100_core: MAC 100 core and dma code; +- dwmac100_dma.c: dma funtions for the MAC chip; +- dwmac1000.h: specific header file for the MAC; +- dwmac_lib.c: generic DMA functions shared among chips +- enh_desc.c: functions for handling enhanced descriptors +- norm_desc.c: functions for handling normal descriptors + TODO: -- Continue to make the driver more generic and suitable for other Synopsys - Ethernet controllers used on other architectures (i.e. ARM). -- 10G controllers are not supported. -- MAC uses Normal descriptors and GMAC uses enhanced ones. - This is a limit that should be reviewed. MAC could want to - use the enhanced structure. -- Checksumming: Rx/Tx csum is done in HW in case of GMAC only. +- XGMAC controller is not supported. - Review the timer optimisation code to use an embedded device that seems to be available in new chip generations. diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt index 570ef2b3d79..df322c10346 100644 --- a/Documentation/scsi/scsi_mid_low_api.txt +++ b/Documentation/scsi/scsi_mid_low_api.txt @@ -1044,9 +1044,9 @@ Details: /** - * queuecommand - queue scsi command, invoke 'done' on completion + * queuecommand - queue scsi command, invoke scp->scsi_done on completion + * @shost: pointer to the scsi host object * @scp: pointer to scsi command object - * @done: function pointer to be invoked on completion * * Returns 0 on success. * @@ -1074,42 +1074,45 @@ Details: * * Other types of errors that are detected immediately may be * flagged by setting scp->result to an appropriate value, - * invoking the 'done' callback, and then returning 0 from this - * function. If the command is not performed immediately (and the - * LLD is starting (or will start) the given command) then this - * function should place 0 in scp->result and return 0. + * invoking the scp->scsi_done callback, and then returning 0 + * from this function. If the command is not performed + * immediately (and the LLD is starting (or will start) the given + * command) then this function should place 0 in scp->result and + * return 0. * * Command ownership. If the driver returns zero, it owns the - * command and must take responsibility for ensuring the 'done' - * callback is executed. Note: the driver may call done before - * returning zero, but after it has called done, it may not - * return any value other than zero. If the driver makes a - * non-zero return, it must not execute the command's done - * callback at any time. - * - * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") - * and is expected to be held on return. + * command and must take responsibility for ensuring the + * scp->scsi_done callback is executed. Note: the driver may + * call scp->scsi_done before returning zero, but after it has + * called scp->scsi_done, it may not return any value other than + * zero. If the driver makes a non-zero return, it must not + * execute the command's scsi_done callback at any time. + * + * Locks: up to and including 2.6.36, struct Scsi_Host::host_lock + * held on entry (with "irqsave") and is expected to be + * held on return. From 2.6.37 onwards, queuecommand is + * called without any locks held. * * Calling context: in interrupt (soft irq) or process context * - * Notes: This function should be relatively fast. Normally it will - * not wait for IO to complete. Hence the 'done' callback is invoked - * (often directly from an interrupt service routine) some time after - * this function has returned. In some cases (e.g. pseudo adapter - * drivers that manufacture the response to a SCSI INQUIRY) - * the 'done' callback may be invoked before this function returns. - * If the 'done' callback is not invoked within a certain period - * the SCSI mid level will commence error processing. - * If a status of CHECK CONDITION is placed in "result" when the - * 'done' callback is invoked, then the LLD driver should - * perform autosense and fill in the struct scsi_cmnd::sense_buffer + * Notes: This function should be relatively fast. Normally it + * will not wait for IO to complete. Hence the scp->scsi_done + * callback is invoked (often directly from an interrupt service + * routine) some time after this function has returned. In some + * cases (e.g. pseudo adapter drivers that manufacture the + * response to a SCSI INQUIRY) the scp->scsi_done callback may be + * invoked before this function returns. If the scp->scsi_done + * callback is not invoked within a certain period the SCSI mid + * level will commence error processing. If a status of CHECK + * CONDITION is placed in "result" when the scp->scsi_done + * callback is invoked, then the LLD driver should perform + * autosense and fill in the struct scsi_cmnd::sense_buffer * array. The scsi_cmnd::sense_buffer array is zeroed prior to * the mid level queuing a command to an LLD. * * Defined in: LLD **/ - int queuecommand(struct scsi_cmnd * scp, - void (*done)(struct scsi_cmnd *)) + int queuecommand(struct Scsi_Host *shost, struct scsi_cmnd * scp) /** diff --git a/Documentation/trace/events-power.txt b/Documentation/trace/events-power.txt new file mode 100644 index 00000000000..96d87b67fe3 --- /dev/null +++ b/Documentation/trace/events-power.txt @@ -0,0 +1,90 @@ + + Subsystem Trace Points: power + +The power tracing system captures events related to power transitions +within the kernel. Broadly speaking there are three major subheadings: + + o Power state switch which reports events related to suspend (S-states), + cpuidle (C-states) and cpufreq (P-states) + o System clock related changes + o Power domains related changes and transitions + +This document describes what each of the tracepoints is and why they +might be useful. + +Cf. include/trace/events/power.h for the events definitions. + +1. Power state switch events +============================ + +1.1 New trace API +----------------- + +A 'cpu' event class gathers the CPU-related events: cpuidle and +cpufreq. + +cpu_idle "state=%lu cpu_id=%lu" +cpu_frequency "state=%lu cpu_id=%lu" + +A suspend event is used to indicate the system going in and out of the +suspend mode: + +machine_suspend "state=%lu" + + +Note: the value of '-1' or '4294967295' for state means an exit from the current state, +i.e. trace_cpu_idle(4, smp_processor_id()) means that the system +enters the idle state 4, while trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id()) +means that the system exits the previous idle state. + +The event which has 'state=4294967295' in the trace is very important to the user +space tools which are using it to detect the end of the current state, and so to +correctly draw the states diagrams and to calculate accurate statistics etc. + +1.2 DEPRECATED trace API +------------------------ + +A new Kconfig option CONFIG_EVENT_POWER_TRACING_DEPRECATED with the default value of +'y' has been created. This allows the legacy trace power API to be used conjointly +with the new trace API. +The Kconfig option, the old trace API (in include/trace/events/power.h) and the +old trace points will disappear in a future release (namely 2.6.41). + +power_start "type=%lu state=%lu cpu_id=%lu" +power_frequency "type=%lu state=%lu cpu_id=%lu" +power_end "cpu_id=%lu" + +The 'type' parameter takes one of those macros: + . POWER_NONE = 0, + . POWER_CSTATE = 1, /* C-State */ + . POWER_PSTATE = 2, /* Fequency change or DVFS */ + +The 'state' parameter is set depending on the type: + . Target C-state for type=POWER_CSTATE, + . Target frequency for type=POWER_PSTATE, + +power_end is used to indicate the exit of a state, corresponding to the latest +power_start event. + +2. Clocks events +================ +The clock events are used for clock enable/disable and for +clock rate change. + +clock_enable "%s state=%lu cpu_id=%lu" +clock_disable "%s state=%lu cpu_id=%lu" +clock_set_rate "%s state=%lu cpu_id=%lu" + +The first parameter gives the clock name (e.g. "gpio1_iclk"). +The second parameter is '1' for enable, '0' for disable, the target +clock rate for set_rate. + +3. Power domains events +======================= +The power domain events are used for power domains transitions + +power_domain_target "%s state=%lu cpu_id=%lu" + +The first parameter gives the power domain name (e.g. "mpu_pwrdm"). +The second parameter is the power domain target state. + diff --git a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl index b3e73ddb156..12cecc83cd9 100644 --- a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl +++ b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl @@ -373,9 +373,18 @@ EVENT_PROCESS: print " $regex_lru_isolate/o\n"; next; } + my $isolate_mode = $1; my $nr_scanned = $4; my $nr_contig_dirty = $7; - $perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned; + + # To closer match vmstat scanning statistics, only count isolate_both + # and isolate_inactive as scanning. isolate_active is rotation + # isolate_inactive == 0 + # isolate_active == 1 + # isolate_both == 2 + if ($isolate_mode != 1) { + $perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned; + } $perprocesspid{$process_pid}->{HIGH_NR_CONTIG_DIRTY} += $nr_contig_dirty; } elsif ($tracepoint eq "mm_vmscan_lru_shrink_inactive") { $details = $5; diff --git a/Documentation/video4linux/CARDLIST.em28xx b/Documentation/video4linux/CARDLIST.em28xx index ac2616a62fc..31b485723bc 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:2862,eb1a:2863,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:2863,eb1a:2870,eb1a:2881,eb1a:2883,eb1a:2868,eb1a:2875] 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] @@ -9,7 +9,7 @@ 8 -> Kworld USB2800 (em2800) 9 -> Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker (em2820/em2840) [1b80:e302,1b80:e304,2304:0207,2304:021a] 10 -> Hauppauge WinTV HVR 900 (em2880) [2040:6500] - 11 -> Terratec Hybrid XS (em2880) [0ccd:0042] + 11 -> Terratec Hybrid XS (em2880) 12 -> Kworld PVR TV 2800 RF (em2820/em2840) 13 -> Terratec Prodigy XS (em2880) [0ccd:0047] 14 -> SIIG AVTuner-PVR / Pixelview Prolink PlayTV USB 2.0 (em2820/em2840) @@ -53,7 +53,7 @@ 52 -> DNT DA2 Hybrid (em2881) 53 -> Pinnacle Hybrid Pro (em2881) 54 -> Kworld VS-DVB-T 323UR (em2882) [eb1a:e323] - 55 -> Terratec Hybrid XS (em2882) (em2882) [0ccd:005e] + 55 -> Terratec Cinnergy Hybrid T USB XS (em2882) (em2882) [0ccd:005e,0ccd:0042] 56 -> Pinnacle Hybrid Pro (2) (em2882) [2304:0226] 57 -> Kworld PlusTV HD Hybrid 330 (em2883) [eb1a:a316] 58 -> Compro VideoMate ForYou/Stereo (em2820/em2840) [185b:2041] diff --git a/Documentation/video4linux/CARDLIST.saa7134 b/Documentation/video4linux/CARDLIST.saa7134 index 8d9afc7d801..6b4c72d8862 100644 --- a/Documentation/video4linux/CARDLIST.saa7134 +++ b/Documentation/video4linux/CARDLIST.saa7134 @@ -180,3 +180,5 @@ 179 -> Beholder BeholdTV A7 [5ace:7090] 180 -> Avermedia PCI M733A [1461:4155,1461:4255] 181 -> TechoTrend TT-budget T-3000 [13c2:2804] +182 -> Kworld PCI SBTVD/ISDB-T Full-Seg Hybrid [17de:b136] +183 -> Compro VideoMate Vista M1F [185b:c900] diff --git a/Documentation/video4linux/Makefile b/Documentation/video4linux/Makefile deleted file mode 100644 index 1ed0e98d057..00000000000 --- a/Documentation/video4linux/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# kbuild trick to avoid linker error. Can be omitted if a module is built. -obj- := dummy.o - -# List of programs to build -hostprogs-y := v4lgrab - -# Tell kbuild to always build the programs -always := $(hostprogs-y) diff --git a/Documentation/video4linux/README.cpia b/Documentation/video4linux/README.cpia deleted file mode 100644 index 8a747fee661..00000000000 --- a/Documentation/video4linux/README.cpia +++ /dev/null @@ -1,191 +0,0 @@ -This is a driver for the CPiA PPC2 driven parallel connected -Camera. For example the Creative WebcamII is CPiA driven. - - ) [1]Peter Pregler, Linz 2000, published under the [2]GNU GPL - ---------------------------------------------------------------------------- - -USAGE: - -General: -======== - -1) Make sure you have created the video devices (/dev/video*): - -- if you have a recent MAKEDEV do a 'cd /dev;./MAKEDEV video' -- otherwise do a: - -cd /dev -mknod video0 c 81 0 -ln -s video0 video - -2) Compile the kernel (see below for the list of options to use), - configure your parport and reboot. - -3) If all worked well you should get messages similar - to the following (your versions may be different) on the console: - -V4L-Driver for Vision CPiA based cameras v0.7.4 -parport0: read2 timeout. -parport0: Multimedia device, VLSI Vision Ltd PPC2 -Parallel port driver for Vision CPiA based camera - CPIA Version: 1.20 (2.0) - CPIA PnP-ID: 0553:0002:0100 - VP-Version: 1.0 0100 - 1 camera(s) found - - -As modules: -=========== - -Make sure you have selected the following kernel options (you can -select all stuff as modules): - -The cpia-stuff is in the section 'Character devices -> Video For Linux'. - -CONFIG_PARPORT=m -CONFIG_PARPORT_PC=m -CONFIG_PARPORT_PC_FIFO=y -CONFIG_PARPORT_1284=y -CONFIG_VIDEO_DEV=m -CONFIG_VIDEO_CPIA=m -CONFIG_VIDEO_CPIA_PP=m - -For autoloading of all those modules you need to tell module-init-tools -some stuff. Add the following line to your module-init-tools config-file -(e.g. /etc/modprobe.conf or wherever your distribution does store that -stuff): - -options parport_pc io=0x378 irq=7 dma=3 -alias char-major-81 cpia_pp - -The first line tells the dma/irq channels to use. Those _must_ match -the settings of your BIOS. Do NOT simply use the values above. See -Documentation/parport.txt for more information about this. The second -line associates the video-device file with the driver. Of cause you -can also load the modules once upon boot (usually done in /etc/modules). - -Linked into the kernel: -======================= - -Make sure you have selected the following kernel options. Note that -you cannot compile the parport-stuff as modules and the cpia-driver -statically (the other way round is okay though). - -The cpia-stuff is in the section 'Character devices -> Video For Linux'. - -CONFIG_PARPORT=y -CONFIG_PARPORT_PC=y -CONFIG_PARPORT_PC_FIFO=y -CONFIG_PARPORT_1284=y -CONFIG_VIDEO_DEV=y -CONFIG_VIDEO_CPIA=y -CONFIG_VIDEO_CPIA_PP=y - -To use DMA/irq you will need to tell the kernel upon boot time the -hardware configuration of the parport. You can give the boot-parameter -at the LILO-prompt or specify it in lilo.conf. I use the following -append-line in lilo.conf: - - append="parport=0x378,7,3" - -See Documentation/parport.txt for more information about the -configuration of the parport and the values given above. Do not simply -use the values given above. - ---------------------------------------------------------------------------- -FEATURES: - -- mmap/read v4l-interface (but no overlay) -- image formats: CIF/QCIF, SIF/QSIF, various others used by isabel; - note: all sizes except CIF/QCIF are implemented by clipping, i.e. - pixels are not uploaded from the camera -- palettes: VIDEO_PALETTE_GRAY, VIDEO_PALETTE_RGB565, VIDEO_PALETTE_RGB555, - VIDEO_PALETTE_RGB24, VIDEO_PALETTE_RGB32, VIDEO_PALETTE_YUYV, - VIDEO_PALETTE_UYVY, VIDEO_PALETTE_YUV422 -- state information (color balance, exposure, ...) is preserved between - device opens -- complete control over camera via proc-interface (_all_ camera settings are - supported), there is also a python-gtk application available for this [3] -- works under SMP (but the driver is completely serialized and synchronous) - so you get no benefit from SMP, but at least it does not crash your box -- might work for non-Intel architecture, let us know about this - ---------------------------------------------------------------------------- -TESTED APPLICATIONS: - -- a simple test application based on Xt is available at [3] -- another test-application based on gqcam-0.4 (uses GTK) -- gqcam-0.6 should work -- xawtv-3.x (also the webcam software) -- xawtv-2.46 -- w3cam (cgi-interface and vidcat, e.g. you may try out 'vidcat |xv - -maxpect -root -quit +noresetroot -rmode 5 -') -- vic, the MBONE video conferencing tool (version 2.8ucl4-1) -- isabel 3R4beta (barely working, but AFAICT all the problems are on - their side) -- camserv-0.40 - -See [3] for pointers to v4l-applications. - ---------------------------------------------------------------------------- -KNOWN PROBLEMS: - -- some applications do not handle the image format correctly, you will - see strange horizontal stripes instead of a nice picture -> make sure - your application does use a supported image size or queries the driver - for the actually used size (reason behind this: the camera cannot - provide any image format, so if size NxM is requested the driver will - use a format to the closest fitting N1xM1, the application should now - query for this granted size, most applications do not). -- all the todo ;) -- if there is not enough light and the picture is too dark try to - adjust the SetSensorFPS setting, automatic frame rate adjustment - has its price -- do not try out isabel 3R4beta (built 135), you will be disappointed - ---------------------------------------------------------------------------- -TODO: - -- multiple camera support (struct camera or something) - This should work, - but hasn't been tested yet. -- architecture independence? -- SMP-safe asynchronous mmap interface -- nibble mode for old parport interfaces -- streaming capture, this should give a performance gain - ---------------------------------------------------------------------------- -IMPLEMENTATION NOTES: - -The camera can act in two modes, streaming or grabbing. Right now a -polling grab-scheme is used. Maybe interrupt driven streaming will be -used for a asynchronous mmap interface in the next major release of the -driver. This might give a better frame rate. - ---------------------------------------------------------------------------- -THANKS (in no particular order): - -- Scott J. Bertin <sbertin@mindspring.com> for cleanups, the proc-filesystem - and much more -- Henry Bruce <whb@vvl.co.uk> for providing developers information about - the CPiA chip, I wish all companies would treat Linux as seriously -- Karoly Erdei <Karoly.Erdei@risc.uni-linz.ac.at> and RISC-Linz for being - my boss ;) resp. my employer and for providing me the hardware and - allow me to devote some working time to this project -- Manuel J. Petit de Gabriel <mpetit@dit.upm.es> for providing help - with Isabel (http://isabel.dit.upm.es/) -- Bas Huisman <bhuism@cs.utwente.nl> for writing the initial parport code -- Jarl Totland <Jarl.Totland@bdc.no> for setting up the mailing list - and maintaining the web-server[3] -- Chris Whiteford <Chris@informinteractive.com> for fixes related to the - 1.02 firmware -- special kudos to all the tester whose machines crashed and/or - will crash. :) - ---------------------------------------------------------------------------- -REFERENCES - - 1. http://www.risc.uni-linz.ac.at/ - mailto:Peter_Pregler@email.com - 2. see the file COPYING in the top directory of the kernel tree - 3. http://webcam.sourceforge.net/ diff --git a/Documentation/video4linux/Zoran b/Documentation/video4linux/Zoran index 00e3f926781..699b60e070d 100644 --- a/Documentation/video4linux/Zoran +++ b/Documentation/video4linux/Zoran @@ -322,76 +322,11 @@ your IRQs and make sure the card has its own interrupts. 4. Programming interface -This driver conforms to video4linux and video4linux2, both can be used to -use the driver. Since video4linux didn't provide adequate calls to fully -use the cards' features, we've introduced several programming extensions, -which are currently officially accepted in the 2.4.x branch of the kernel. -These extensions are known as the v4l/mjpeg extensions. See zoran.h for -details (structs/ioctls). - -Information - video4linux: -http://linux.bytesex.org/v4l2/API.html -Documentation/video4linux/API.html -/usr/include/linux/videodev.h - -Information - video4linux/mjpeg extensions: -./zoran.h -(also see below) - -Information - video4linux2: -http://linuxtv.org -http://v4l2spec.bytesex.org/ -/usr/include/linux/videodev2.h - -More information on the video4linux/mjpeg extensions, by Serguei -Miridonovi and Rainer Johanni: --- -The ioctls for that interface are as follows: - -BUZIOC_G_PARAMS -BUZIOC_S_PARAMS - -Get and set the parameters of the buz. The user should always do a -BUZIOC_G_PARAMS (with a struct buz_params) to obtain the default -settings, change what he likes and then make a BUZIOC_S_PARAMS call. - -BUZIOC_REQBUFS - -Before being able to capture/playback, the user has to request -the buffers he is wanting to use. Fill the structure -zoran_requestbuffers with the size (recommended: 256*1024) and -the number (recommended 32 up to 256). There are no such restrictions -as for the Video for Linux buffers, you should LEAVE SUFFICIENT -MEMORY for your system however, else strange things will happen .... -On return, the zoran_requestbuffers structure contains number and -size of the actually allocated buffers. -You should use these numbers for doing a mmap of the buffers -into the user space. -The BUZIOC_REQBUFS ioctl also makes it happen, that the next mmap -maps the MJPEG buffer instead of the V4L buffers. - -BUZIOC_QBUF_CAPT -BUZIOC_QBUF_PLAY - -Queue a buffer for capture or playback. The first call also starts -streaming capture. When streaming capture is going on, you may -only queue further buffers or issue syncs until streaming -capture is switched off again with a argument of -1 to -a BUZIOC_QBUF_CAPT/BUZIOC_QBUF_PLAY ioctl. - -BUZIOC_SYNC - -Issue this ioctl when all buffers are queued. This ioctl will -block until the first buffer becomes free for saving its -data to disk (after BUZIOC_QBUF_CAPT) or for reuse (after BUZIOC_QBUF_PLAY). - -BUZIOC_G_STATUS - -Get the status of the input lines (video source connected/norm). +This driver conforms to video4linux2. Support for V4L1 and for the custom +zoran ioctls has been removed in kernel 2.6.38. For programming example, please, look at lavrec.c and lavplay.c code in -lavtools-1.2p2 package (URL: http://www.cicese.mx/) -and the 'examples' directory in the original Buz driver distribution. +the MJPEG-tools (http://mjpeg.sf.net/). Additional notes for software developers: @@ -402,9 +337,6 @@ Additional notes for software developers: standard is "more constant" for current country than geometry settings of a variety of TV capture cards which may work in ITU or square pixel format. --- -Please note that lavplay/lavrec are also included in the MJPEG-tools -(http://mjpeg.sf.net/). =========================== diff --git a/Documentation/video4linux/bttv/Cards b/Documentation/video4linux/bttv/Cards index 12217fc4972..db833ced2cb 100644 --- a/Documentation/video4linux/bttv/Cards +++ b/Documentation/video4linux/bttv/Cards @@ -464,10 +464,6 @@ Siemens ------- Multimedia eXtension Board (MXB) (SAA7146, SAA7111) -Stradis -------- - SDM275,SDM250,SDM026,SDM025 (SAA7146, IBMMPEG2): MPEG2 decoder only - Powercolor ---------- MTV878 diff --git a/Documentation/video4linux/gspca.txt b/Documentation/video4linux/gspca.txt index 6a562eeeb4c..261776e0c5e 100644 --- a/Documentation/video4linux/gspca.txt +++ b/Documentation/video4linux/gspca.txt @@ -366,6 +366,7 @@ t613 17a1:0128 TASCORP JPEG Webcam, NGS Cyclops vc032x 17ef:4802 Lenovo Vc0323+MI1310_SOC pac207 2001:f115 D-Link DSB-C120 sq905c 2770:9050 Disney pix micro (CIF) +sq905c 2770:9051 Lego Bionicle sq905c 2770:9052 Disney pix micro 2 (VGA) sq905c 2770:905c All 11 known cameras with this ID sq905 2770:9120 All 24 known cameras with this ID diff --git a/Documentation/video4linux/meye.txt b/Documentation/video4linux/meye.txt index bf3af5fe558..34e2842c70a 100644 --- a/Documentation/video4linux/meye.txt +++ b/Documentation/video4linux/meye.txt @@ -45,8 +45,6 @@ module argument syntax (<param>=<value> when passing the option to the module or meye.<param>=<value> on the kernel boot line when meye is statically linked into the kernel). Those options are: - forcev4l1: force use of V4L1 API instead of V4L2 - gbuffers: number of capture buffers, default is 2 (32 max) gbufsize: size of each capture buffer, default is 614400 @@ -79,9 +77,8 @@ Usage: Private API: ------------ - The driver supports frame grabbing with the video4linux API - (either v4l1 or v4l2), so all video4linux tools (like xawtv) - should work with this driver. + The driver supports frame grabbing with the video4linux API, + so all video4linux tools (like xawtv) should work with this driver. Besides the video4linux interface, the driver has a private interface for accessing the Motion Eye extended parameters (camera sharpness, @@ -123,7 +120,4 @@ Private API: Bugs / Todo: ------------ - - the driver could be much cleaned up by removing the v4l1 support. - However, this means all v4l1-only applications will stop working. - - 'motioneye' still uses the meye private v4l1 API extensions. diff --git a/Documentation/video4linux/v4lgrab.c b/Documentation/video4linux/v4lgrab.c deleted file mode 100644 index c8ded175796..00000000000 --- a/Documentation/video4linux/v4lgrab.c +++ /dev/null @@ -1,201 +0,0 @@ -/* Simple Video4Linux image grabber. */ -/* - * Video4Linux Driver Test/Example Framegrabbing Program - * - * Compile with: - * gcc -s -Wall -Wstrict-prototypes v4lgrab.c -o v4lgrab - * Use as: - * v4lgrab >image.ppm - * - * Copyright (C) 1998-05-03, Phil Blundell <philb@gnu.org> - * Copied from http://www.tazenda.demon.co.uk/phil/vgrabber.c - * with minor modifications (Dave Forrest, drf5n@virginia.edu). - * - * - * For some cameras you may need to pre-load libv4l to perform - * the necessary decompression, e.g.: - * - * export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so - * ./v4lgrab >image.ppm - * - * see http://hansdegoede.livejournal.com/3636.html for details. - * - */ - -#include <unistd.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <stdio.h> -#include <sys/ioctl.h> -#include <stdlib.h> - -#include <linux/types.h> -#include <linux/videodev.h> - -#define VIDEO_DEV "/dev/video0" - -/* Stole this from tvset.c */ - -#define READ_VIDEO_PIXEL(buf, format, depth, r, g, b) \ -{ \ - switch (format) \ - { \ - case VIDEO_PALETTE_GREY: \ - switch (depth) \ - { \ - case 4: \ - case 6: \ - case 8: \ - (r) = (g) = (b) = (*buf++ << 8);\ - break; \ - \ - case 16: \ - (r) = (g) = (b) = \ - *((unsigned short *) buf); \ - buf += 2; \ - break; \ - } \ - break; \ - \ - \ - case VIDEO_PALETTE_RGB565: \ - { \ - unsigned short tmp = *(unsigned short *)buf; \ - (r) = tmp&0xF800; \ - (g) = (tmp<<5)&0xFC00; \ - (b) = (tmp<<11)&0xF800; \ - buf += 2; \ - } \ - break; \ - \ - case VIDEO_PALETTE_RGB555: \ - (r) = (buf[0]&0xF8)<<8; \ - (g) = ((buf[0] << 5 | buf[1] >> 3)&0xF8)<<8; \ - (b) = ((buf[1] << 2 ) & 0xF8)<<8; \ - buf += 2; \ - break; \ - \ - case VIDEO_PALETTE_RGB24: \ - (r) = buf[0] << 8; (g) = buf[1] << 8; \ - (b) = buf[2] << 8; \ - buf += 3; \ - break; \ - \ - default: \ - fprintf(stderr, \ - "Format %d not yet supported\n", \ - format); \ - } \ -} - -static int get_brightness_adj(unsigned char *image, long size, int *brightness) { - long i, tot = 0; - for (i=0;i<size*3;i++) - tot += image[i]; - *brightness = (128 - tot/(size*3))/3; - return !((tot/(size*3)) >= 126 && (tot/(size*3)) <= 130); -} - -int main(int argc, char ** argv) -{ - int fd = open(VIDEO_DEV, O_RDONLY), f; - struct video_capability cap; - struct video_window win; - struct video_picture vpic; - - unsigned char *buffer, *src; - int bpp = 24, r = 0, g = 0, b = 0; - unsigned int i, src_depth = 16; - - if (fd < 0) { - perror(VIDEO_DEV); - exit(1); - } - - if (ioctl(fd, VIDIOCGCAP, &cap) < 0) { - perror("VIDIOGCAP"); - fprintf(stderr, "(" VIDEO_DEV " not a video4linux device?)\n"); - close(fd); - exit(1); - } - - if (ioctl(fd, VIDIOCGWIN, &win) < 0) { - perror("VIDIOCGWIN"); - close(fd); - exit(1); - } - - if (ioctl(fd, VIDIOCGPICT, &vpic) < 0) { - perror("VIDIOCGPICT"); - close(fd); - exit(1); - } - - if (cap.type & VID_TYPE_MONOCHROME) { - vpic.depth=8; - vpic.palette=VIDEO_PALETTE_GREY; /* 8bit grey */ - if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) { - vpic.depth=6; - if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) { - vpic.depth=4; - if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) { - fprintf(stderr, "Unable to find a supported capture format.\n"); - close(fd); - exit(1); - } - } - } - } else { - vpic.depth=24; - vpic.palette=VIDEO_PALETTE_RGB24; - - if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) { - vpic.palette=VIDEO_PALETTE_RGB565; - vpic.depth=16; - - if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) { - vpic.palette=VIDEO_PALETTE_RGB555; - vpic.depth=15; - - if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) { - fprintf(stderr, "Unable to find a supported capture format.\n"); - return -1; - } - } - } - } - - buffer = malloc(win.width * win.height * bpp); - if (!buffer) { - fprintf(stderr, "Out of memory.\n"); - exit(1); - } - - do { - int newbright; - read(fd, buffer, win.width * win.height * bpp); - f = get_brightness_adj(buffer, win.width * win.height, &newbright); - if (f) { - vpic.brightness += (newbright << 8); - if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) { - perror("VIDIOSPICT"); - break; - } - } - } while (f); - - fprintf(stdout, "P6\n%d %d 255\n", win.width, win.height); - - src = buffer; - - for (i = 0; i < win.width * win.height; i++) { - READ_VIDEO_PIXEL(src, vpic.palette, src_depth, r, g, b); - fputc(r>>8, stdout); - fputc(g>>8, stdout); - fputc(b>>8, stdout); - } - - close(fd); - return 0; -} diff --git a/Documentation/video4linux/videobuf b/Documentation/video4linux/videobuf index 17a1f9abf26..1d00d7f15b8 100644 --- a/Documentation/video4linux/videobuf +++ b/Documentation/video4linux/videobuf @@ -247,8 +247,6 @@ calls. The relevant helper functions are: int nonblocking); int videobuf_streamon(struct videobuf_queue *q); int videobuf_streamoff(struct videobuf_queue *q); - int videobuf_cgmbuf(struct videobuf_queue *q, struct video_mbuf *mbuf, - int count); So, for example, a VIDIOC_REQBUFS call turns into a call to the driver's vidioc_reqbufs() callback which, in turn, usually only needs to locate the @@ -258,10 +256,7 @@ boilerplate in a lot of V4L2 drivers. The vidioc_streamon() and vidioc_streamoff() functions will be a bit more complex, of course, since they will also need to deal with starting and -stopping the capture engine. videobuf_cgmbuf(), called from the driver's -vidiocgmbuf() function, only exists if the V4L1 compatibility module has -been selected with CONFIG_VIDEO_V4L1_COMPAT, so its use must be surrounded -with #ifdef directives. +stopping the capture engine. Buffer allocation diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt index 30b43e1b269..bdeb81ccb5f 100644 --- a/Documentation/x86/boot.txt +++ b/Documentation/x86/boot.txt @@ -600,6 +600,7 @@ Protocol: 2.07+ 0x00000001 lguest 0x00000002 Xen 0x00000003 Moorestown MID + 0x00000004 CE4100 TV Platform Field name: hardware_subarch_data Type: write (subarch-dependent) |