diff options
Diffstat (limited to 'Documentation')
61 files changed, 1705 insertions, 334 deletions
diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX index 49c051380daf..f54273e2ac97 100644 --- a/Documentation/00-INDEX +++ b/Documentation/00-INDEX @@ -270,8 +270,6 @@ preempt-locking.txt - info on locking under a preemptive kernel. printk-formats.txt - how to get printk format specifiers right -prio_tree.txt - - info on radix-priority-search-tree use for indexing vmas. ramoops.txt - documentation of the ramoops oops/panic logging module. rbtree.txt diff --git a/Documentation/ABI/obsolete/proc-pid-oom_adj b/Documentation/ABI/obsolete/proc-pid-oom_adj deleted file mode 100644 index 9a3cb88ade47..000000000000 --- a/Documentation/ABI/obsolete/proc-pid-oom_adj +++ /dev/null @@ -1,22 +0,0 @@ -What: /proc/<pid>/oom_adj -When: August 2012 -Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's - badness heuristic used to determine which task to kill when the kernel - is out of memory. - - The badness heuristic has since been rewritten since the introduction of - this tunable such that its meaning is deprecated. The value was - implemented as a bitshift on a score generated by the badness() - function that did not have any precise units of measure. With the - rewrite, the score is given as a proportion of available memory to the - task allocating pages, so using a bitshift which grows the score - exponentially is, thus, impossible to tune with fine granularity. - - A much more powerful interface, /proc/<pid>/oom_score_adj, was - introduced with the oom killer rewrite that allows users to increase or - decrease the badness score linearly. This interface will replace - /proc/<pid>/oom_adj. - - A warning will be emitted to the kernel log if an application uses this - deprecated interface. After it is printed once, future warnings will be - suppressed until the kernel is rebooted. diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index c1eb41cb9876..279da08f7541 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -206,3 +206,17 @@ Description: when a discarded area is read the discard_zeroes_data parameter will be set to one. Otherwise it will be 0 and the result of reading a discarded area is undefined. + +What: /sys/block/<disk>/queue/write_same_max_bytes +Date: January 2012 +Contact: Martin K. Petersen <martin.petersen@oracle.com> +Description: + Some devices support a write same operation in which a + single data block can be written to a range of several + contiguous blocks on storage. This can be used to wipe + areas on disk or to initialize drives in a RAID + configuration. write_same_max_bytes indicates how many + bytes can be written in a single write same command. If + write_same_max_bytes is 0, write same is not supported + by the device. + diff --git a/Documentation/ABI/testing/sysfs-bus-fcoe b/Documentation/ABI/testing/sysfs-bus-fcoe index 469d09c02f6b..50e2a80ea28f 100644 --- a/Documentation/ABI/testing/sysfs-bus-fcoe +++ b/Documentation/ABI/testing/sysfs-bus-fcoe @@ -9,19 +9,19 @@ Attributes: this value will change the dev_loss_tmo for all FCFs discovered by this controller. - lesb_link_fail: Link Error Status Block (LESB) link failure count. + lesb/link_fail: Link Error Status Block (LESB) link failure count. - lesb_vlink_fail: Link Error Status Block (LESB) virtual link + lesb/vlink_fail: Link Error Status Block (LESB) virtual link failure count. - lesb_miss_fka: Link Error Status Block (LESB) missed FCoE + lesb/miss_fka: Link Error Status Block (LESB) missed FCoE Initialization Protocol (FIP) Keep-Alives (FKA). - lesb_symb_err: Link Error Status Block (LESB) symbolic error count. + lesb/symb_err: Link Error Status Block (LESB) symbolic error count. - lesb_err_block: Link Error Status Block (LESB) block error count. + lesb/err_block: Link Error Status Block (LESB) block error count. - lesb_fcs_error: Link Error Status Block (LESB) Fibre Channel + lesb/fcs_error: Link Error Status Block (LESB) Fibre Channel Serivces error count. Notes: ctlr_X (global increment starting at 0) diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index c6ae4c9d0e0c..4fdf6b562d1c 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -2582,6 +2582,10 @@ ioctls.</para> <listitem> <para>Support for frequency band enumeration: &VIDIOC-ENUM-FREQ-BANDS; ioctl.</para> </listitem> + <listitem> + <para>Vendor and device specific media bus pixel formats. + <xref linkend="v4l2-mbus-vendor-spec-fmts" />.</para> + </listitem> </itemizedlist> </section> diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index 272a5f718509..7fe5be1d3bbb 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -1586,7 +1586,6 @@ frame counter of the frame that is currently displayed (decoded). This value is the decoder is started.</entry> </row> - <row><entry></entry></row> <row> <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE</constant> </entry> @@ -2270,6 +2269,14 @@ Applicable to the MPEG1, MPEG2, MPEG4 encoders.</entry> </row> <row><entry></entry></row> + <row id="v4l2-mpeg-video-vbv-delay"> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VBV_DELAY</constant> </entry> + <entry>integer</entry> + </row><row><entry spanname="descr">Sets the initial delay in milliseconds for +VBV buffer control.</entry> + </row> + + <row><entry></entry></row> <row> <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE</constant> </entry> <entry>integer</entry> @@ -2334,6 +2341,265 @@ Applicable to the MPEG4 decoder.</entry> </row><row><entry spanname="descr">vop_time_increment value for MPEG4. Applicable to the MPEG4 encoder.</entry> </row> + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING</constant> </entry> + <entry>boolean</entry> + </row> + <row><entry spanname="descr">Enable generation of frame packing supplemental enhancement information in the encoded bitstream. +The frame packing SEI message contains the arrangement of L and R planes for 3D viewing. Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0</constant> </entry> + <entry>boolean</entry> + </row> + <row><entry spanname="descr">Sets current frame as frame0 in frame packing SEI. +Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row id="v4l2-mpeg-video-h264-sei-fp-arrangement-type"> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE</constant> </entry> + <entry>enum v4l2_mpeg_video_h264_sei_fp_arrangement_type</entry> + </row> + <row><entry spanname="descr">Frame packing arrangement type for H264 SEI. +Applicable to the H264 encoder. +Possible values are:</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD</constant> </entry> + <entry>Pixels are alternatively from L and R.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN</constant> </entry> + <entry>L and R are interlaced by column.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW</constant> </entry> + <entry>L and R are interlaced by row.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE</constant> </entry> + <entry>L is on the left, R on the right.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM</constant> </entry> + <entry>L is on top, R on bottom.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL</constant> </entry> + <entry>One view per frame.</entry> + </row> + </tbody> + </entrytbl> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO</constant> </entry> + <entry>boolean</entry> + </row> + <row><entry spanname="descr">Enables flexible macroblock ordering in the encoded bitstream. It is a technique +used for restructuring the ordering of macroblocks in pictures. Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row id="v4l2-mpeg-video-h264-fmo-map-type"> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE</constant> </entry> + <entry>enum v4l2_mpeg_video_h264_fmo_map_type</entry> + </row> + <row><entry spanname="descr">When using FMO, the map type divides the image in different scan patterns of macroblocks. +Applicable to the H264 encoder. +Possible values are:</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES</constant> </entry> + <entry>Slices are interleaved one after other with macroblocks in run length order.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES</constant> </entry> + <entry>Scatters the macroblocks based on a mathematical function known to both encoder and decoder.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER</constant> </entry> + <entry>Macroblocks arranged in rectangular areas or regions of interest.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT</constant> </entry> + <entry>Slice groups grow in a cyclic way from centre to outwards.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN</constant> </entry> + <entry>Slice groups grow in raster scan pattern from left to right.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN</constant> </entry> + <entry>Slice groups grow in wipe scan pattern from top to bottom.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT</constant> </entry> + <entry>User defined map type.</entry> + </row> + </tbody> + </entrytbl> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP</constant> </entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Number of slice groups in FMO. +Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row id="v4l2-mpeg-video-h264-fmo-change-direction"> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION</constant> </entry> + <entry>enum v4l2_mpeg_video_h264_fmo_change_dir</entry> + </row> + <row><entry spanname="descr">Specifies a direction of the slice group change for raster and wipe maps. +Applicable to the H264 encoder. +Possible values are:</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT</constant> </entry> + <entry>Raster scan or wipe right.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT</constant> </entry> + <entry>Reverse raster scan or wipe left.</entry> + </row> + </tbody> + </entrytbl> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE</constant> </entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Specifies the size of the first slice group for raster and wipe map. +Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH</constant> </entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Specifies the number of consecutive macroblocks for the interleaved map. +Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_ASO</constant> </entry> + <entry>boolean</entry> + </row> + <row><entry spanname="descr">Enables arbitrary slice ordering in encoded bitstream. +Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER</constant> </entry> + <entry>integer</entry> + </row><row><entry spanname="descr">Specifies the slice order in ASO. Applicable to the H264 encoder. +The supplied 32-bit integer is interpreted as follows (bit +0 = least significant bit):</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry>Bit 0:15</entry> + <entry>Slice ID</entry> + </row> + <row> + <entry>Bit 16:32</entry> + <entry>Slice position or order</entry> + </row> + </tbody> + </entrytbl> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING</constant> </entry> + <entry>boolean</entry> + </row> + <row><entry spanname="descr">Enables H264 hierarchical coding. +Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row id="v4l2-mpeg-video-h264-hierarchical-coding-type"> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE</constant> </entry> + <entry>enum v4l2_mpeg_video_h264_hierarchical_coding_type</entry> + </row> + <row><entry spanname="descr">Specifies the hierarchical coding type. +Applicable to the H264 encoder. +Possible values are:</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B</constant> </entry> + <entry>Hierarchical B coding.</entry> + </row> + <row> + <entry><constant>V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P</constant> </entry> + <entry>Hierarchical P coding.</entry> + </row> + </tbody> + </entrytbl> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER</constant> </entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Specifies the number of hierarchical coding layers. +Applicable to the H264 encoder.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP</constant> </entry> + <entry>integer</entry> + </row><row><entry spanname="descr">Specifies a user defined QP for each layer. Applicable to the H264 encoder. +The supplied 32-bit integer is interpreted as follows (bit +0 = least significant bit):</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry>Bit 0:15</entry> + <entry>QP value</entry> + </row> + <row> + <entry>Bit 16:32</entry> + <entry>Layer number</entry> + </row> + </tbody> + </entrytbl> + </row> + </tbody> </tgroup> </table> @@ -4267,6 +4533,16 @@ interface and may change in the future.</para> pixels / second. </entry> </row> + <row> + <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN</constant></entry> + <entry>menu</entry> + </row> + <row id="v4l2-test-pattern"> + <entry spanname="descr"> Some capture/display/sensor devices have + the capability to generate test pattern images. These hardware + specific test patterns can be used to test if a device is working + properly.</entry> + </row> <row><entry></entry></row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml index 97f785add841..b5d1cbdc558b 100644 --- a/Documentation/DocBook/media/v4l/io.xml +++ b/Documentation/DocBook/media/v4l/io.xml @@ -677,8 +677,10 @@ memory, set by the application. See <xref linkend="userp" /> for details. <entry><structfield>length</structfield></entry> <entry></entry> <entry>Size of the buffer (not the payload) in bytes for the - single-planar API. For the multi-planar API should contain the - number of elements in the <structfield>planes</structfield> array. + single-planar API. For the multi-planar API the application sets + this to the number of elements in the <structfield>planes</structfield> + array. The driver will fill in the actual number of valid elements in + that array. </entry> </row> <row> diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml b/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml index 5274c24d11e0..a990b34d911a 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml @@ -1,11 +1,13 @@ - <refentry id="V4L2-PIX-FMT-NV12M"> + <refentry> <refmeta> - <refentrytitle>V4L2_PIX_FMT_NV12M ('NM12')</refentrytitle> + <refentrytitle>V4L2_PIX_FMT_NV12M ('NM12'), V4L2_PIX_FMT_NV21M ('NM21'), V4L2_PIX_FMT_NV12MT_16X16</refentrytitle> &manvol; </refmeta> <refnamediv> - <refname> <constant>V4L2_PIX_FMT_NV12M</constant></refname> - <refpurpose>Variation of <constant>V4L2_PIX_FMT_NV12</constant> with planes + <refname id="V4L2-PIX-FMT-NV12M"><constant>V4L2_PIX_FMT_NV12M</constant></refname> + <refname id="V4L2-PIX-FMT-NV21M"><constant>V4L2_PIX_FMT_NV21M</constant></refname> + <refname id="V4L2-PIX-FMT-NV12MT_16X16"><constant>V4L2_PIX_FMT_NV12MT_16X16</constant></refname> + <refpurpose>Variation of <constant>V4L2_PIX_FMT_NV12</constant> and <constant>V4L2_PIX_FMT_NV21</constant> with planes non contiguous in memory. </refpurpose> </refnamediv> <refsect1> @@ -22,7 +24,12 @@ The CbCr plane is the same width, in bytes, as the Y plane (and of the image), but is half as tall in pixels. Each CbCr pair belongs to four pixels. For example, Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to Y'<subscript>00</subscript>, Y'<subscript>01</subscript>, -Y'<subscript>10</subscript>, Y'<subscript>11</subscript>. </para> +Y'<subscript>10</subscript>, Y'<subscript>11</subscript>. +<constant>V4L2_PIX_FMT_NV12MT_16X16</constant> is the tiled version of +<constant>V4L2_PIX_FMT_NV12M</constant> with 16x16 macroblock tiles. Here pixels +are arranged in 16x16 2D tiles and tiles are arranged in linear order in memory. +<constant>V4L2_PIX_FMT_NV21M</constant> is the same as <constant>V4L2_PIX_FMT_NV12M</constant> +except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para> <para><constant>V4L2_PIX_FMT_NV12M</constant> is intended to be used only in drivers and applications that support the multi-planar API, diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml index 1ddbfabe3195..bf94f417592c 100644 --- a/Documentation/DocBook/media/v4l/pixfmt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt.xml @@ -758,6 +758,11 @@ extended control <constant>V4L2_CID_MPEG_STREAM_TYPE</constant>, see <entry>'AVC1'</entry> <entry>H264 video elementary stream without start codes.</entry> </row> + <row id="V4L2-PIX-FMT-H264-MVC"> + <entry><constant>V4L2_PIX_FMT_H264_MVC</constant></entry> + <entry>'MVC'</entry> + <entry>H264 MVC video elementary stream.</entry> + </row> <row id="V4L2-PIX-FMT-H263"> <entry><constant>V4L2_PIX_FMT_H263</constant></entry> <entry>'H263'</entry> @@ -793,6 +798,11 @@ extended control <constant>V4L2_CID_MPEG_STREAM_TYPE</constant>, see <entry>'VC1L'</entry> <entry>VC1, SMPTE 421M Annex L compliant stream.</entry> </row> + <row id="V4L2-PIX-FMT-VP8"> + <entry><constant>V4L2_PIX_FMT_VP8</constant></entry> + <entry>'VP8'</entry> + <entry>VP8 video elementary stream.</entry> + </row> </tbody> </tgroup> </table> @@ -996,6 +1006,34 @@ the other bits are set to 0.</entry> <entry>Old 6-bit greyscale format. Only the most significant 6 bits of each byte are used, the other bits are set to 0.</entry> </row> + <row id="V4L2-PIX-FMT-S5C-UYVY-JPG"> + <entry><constant>V4L2_PIX_FMT_S5C_UYVY_JPG</constant></entry> + <entry>'S5CI'</entry> + <entry>Two-planar format used by Samsung S5C73MX cameras. The +first plane contains interleaved JPEG and UYVY image data, followed by meta data +in form of an array of offsets to the UYVY data blocks. The actual pointer array +follows immediately the interleaved JPEG/UYVY data, the number of entries in +this array equals the height of the UYVY image. Each entry is a 4-byte unsigned +integer in big endian order and it's an offset to a single pixel line of the +UYVY image. The first plane can start either with JPEG or UYVY data chunk. The +size of a single UYVY block equals the UYVY image's width multiplied by 2. The +size of a JPEG chunk depends on the image and can vary with each line. +<para>The second plane, at an offset of 4084 bytes, contains a 4-byte offset to +the pointer array in the first plane. This offset is followed by a 4-byte value +indicating size of the pointer array. All numbers in the second plane are also +in big endian order. Remaining data in the second plane is undefined. The +information in the second plane allows to easily find location of the pointer +array, which can be different for each frame. The size of the pointer array is +constant for given UYVY image height.</para> +<para>In order to extract UYVY and JPEG frames an application can initially set +a data pointer to the start of first plane and then add an offset from the first +entry of the pointers table. Such a pointer indicates start of an UYVY image +pixel line. Whole UYVY line can be copied to a separate buffer. These steps +should be repeated for each line, i.e. the number of entries in the pointer +array. Anything what's in between the UYVY lines is JPEG data and should be +concatenated to form the JPEG stream. </para> +</entry> + </row> </tbody> </tgroup> </table> diff --git a/Documentation/DocBook/media/v4l/subdev-formats.xml b/Documentation/DocBook/media/v4l/subdev-formats.xml index 49c532ebbbbe..a0a936455fae 100644 --- a/Documentation/DocBook/media/v4l/subdev-formats.xml +++ b/Documentation/DocBook/media/v4l/subdev-formats.xml @@ -2565,5 +2565,49 @@ </tgroup> </table> </section> + + <section id="v4l2-mbus-vendor-spec-fmts"> + <title>Vendor and Device Specific Formats</title> + + <note> + <title>Experimental</title> + <para>This is an <link linkend="experimental">experimental</link> +interface and may change in the future.</para> + </note> + + <para>This section lists complex data formats that are either vendor or + device specific. + </para> + + <para>The following table lists the existing vendor and device specific + formats.</para> + + <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-vendor-specific"> + <title>Vendor and device specific formats</title> + <tgroup cols="3"> + <colspec colname="id" align="left" /> + <colspec colname="code" align="left"/> + <colspec colname="remarks" align="left"/> + <thead> + <row> + <entry>Identifier</entry> + <entry>Code</entry> + <entry>Comments</entry> + </row> + </thead> + <tbody valign="top"> + <row id="V4L2-MBUS-FMT-S5C-UYVY-JPEG-1X8"> + <entry>V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8</entry> + <entry>0x5001</entry> + <entry> + Interleaved raw UYVY and JPEG image format with embedded + meta-data used by Samsung S3C73MX camera sensors. + </entry> + </row> + </tbody> + </tgroup> + </table> + </section> + </section> </section> diff --git a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml index 6a821a65a5ae..2d37abefce13 100644 --- a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml +++ b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml @@ -121,8 +121,7 @@ remaining fields or returns an error code. The driver may also set field. It indicates a non-critical (recoverable) streaming error. In such case the application may continue as normal, but should be aware that data in the dequeued buffer might be corrupted. When using the multi-planar API, the -planes array does not have to be passed; the <structfield>m.planes</structfield> -member must be set to NULL in that case.</para> +planes array must be passed in as well.</para> <para>By default <constant>VIDIOC_DQBUF</constant> blocks when no buffer is in the outgoing queue. When the diff --git a/Documentation/DocBook/media/v4l/vidioc-querybuf.xml b/Documentation/DocBook/media/v4l/vidioc-querybuf.xml index 6e414d7b6df7..a597155c052d 100644 --- a/Documentation/DocBook/media/v4l/vidioc-querybuf.xml +++ b/Documentation/DocBook/media/v4l/vidioc-querybuf.xml @@ -48,8 +48,8 @@ <refsect1> <title>Description</title> - <para>This ioctl is part of the <link linkend="mmap">memory -mapping</link> I/O method. It can be used to query the status of a + <para>This ioctl is part of the <link linkend="mmap">streaming +</link> I/O method. It can be used to query the status of a buffer at any time after buffers have been allocated with the &VIDIOC-REQBUFS; ioctl.</para> @@ -71,6 +71,7 @@ the structure.</para> <para>In the <structfield>flags</structfield> field the <constant>V4L2_BUF_FLAG_MAPPED</constant>, +<constant>V4L2_BUF_FLAG_PREPARED</constant>, <constant>V4L2_BUF_FLAG_QUEUED</constant> and <constant>V4L2_BUF_FLAG_DONE</constant> flags will be valid. The <structfield>memory</structfield> field will be set to the current @@ -79,8 +80,10 @@ contains the offset of the buffer from the start of the device memory, the <structfield>length</structfield> field its size. For the multi-planar API, fields <structfield>m.mem_offset</structfield> and <structfield>length</structfield> in the <structfield>m.planes</structfield> -array elements will be used instead. The driver may or may not set the remaining -fields and flags, they are meaningless in this context.</para> +array elements will be used instead and the <structfield>length</structfield> +field of &v4l2-buffer; is set to the number of filled-in array elements. +The driver may or may not set the remaining fields and flags, they are +meaningless in this context.</para> <para>The <structname>v4l2_buffer</structname> structure is specified in <xref linkend="buffer" />.</para> diff --git a/Documentation/DocBook/mtdnand.tmpl b/Documentation/DocBook/mtdnand.tmpl index e0aedb7a7827..fe122d6e686f 100644 --- a/Documentation/DocBook/mtdnand.tmpl +++ b/Documentation/DocBook/mtdnand.tmpl @@ -1216,8 +1216,6 @@ in this page</entry> #define NAND_BBT_LASTBLOCK 0x00000010 /* The bbt is at the given page, else we must scan for the bbt */ #define NAND_BBT_ABSPAGE 0x00000020 -/* The bbt is at the given page, else we must scan for the bbt */ -#define NAND_BBT_SEARCH 0x00000040 /* bbt is stored per chip on multichip devices */ #define NAND_BBT_PERCHIP 0x00000080 /* bbt has a version counter at offset veroffs */ diff --git a/Documentation/arm/Booting b/Documentation/arm/Booting index a341d87d276e..0c1f475fdf36 100644 --- a/Documentation/arm/Booting +++ b/Documentation/arm/Booting @@ -154,13 +154,33 @@ In either case, the following conditions must be met: - CPU mode All forms of interrupts must be disabled (IRQs and FIQs) - The CPU must be in SVC mode. (A special exception exists for Angel) + + For CPUs which do not include the ARM virtualization extensions, the + CPU must be in SVC mode. (A special exception exists for Angel) + + CPUs which include support for the virtualization extensions can be + entered in HYP mode in order to enable the kernel to make full use of + these extensions. This is the recommended boot method for such CPUs, + unless the virtualisations are already in use by a pre-installed + hypervisor. + + If the kernel is not entered in HYP mode for any reason, it must be + entered in SVC mode. - Caches, MMUs The MMU must be off. Instruction cache may be on or off. Data cache must be off. + If the kernel is entered in HYP mode, the above requirements apply to + the HYP mode configuration in addition to the ordinary PL1 (privileged + kernel modes) configuration. In addition, all traps into the + hypervisor must be disabled, and PL1 access must be granted for all + peripherals and CPU resources for which this is architecturally + possible. Except for entering in HYP mode, the system configuration + should be such that a kernel which does not include support for the + virtualization extensions can boot correctly without extra help. + - The boot loader is expected to call the kernel image by jumping directly to the first instruction of the kernel image. diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt index e418dc0a7086..8df5e8e6dceb 100644 --- a/Documentation/block/biodoc.txt +++ b/Documentation/block/biodoc.txt @@ -465,7 +465,6 @@ struct bio { bio_end_io_t *bi_end_io; /* bi_end_io (bio) */ atomic_t bi_cnt; /* pin count: free when it hits zero */ void *bi_private; - bio_destructor_t *bi_destructor; /* bi_destructor (bio) */ }; With this multipage bio design: @@ -647,10 +646,6 @@ for a non-clone bio. There are the 6 pools setup for different size biovecs, so bio_alloc(gfp_mask, nr_iovecs) will allocate a vec_list of the given size from these slabs. -The bi_destructor() routine takes into account the possibility of the bio -having originated from a different source (see later discussions on -n/w to block transfers and kvec_cb) - The bio_get() routine may be used to hold an extra reference on a bio prior to i/o submission, if the bio fields are likely to be accessed after the i/o is issued (since the bio may otherwise get freed in case i/o completion diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 4372e6b8a353..c07f7b4fb88d 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -18,16 +18,16 @@ from the rest of the system. The article on LWN [12] mentions some probable uses of the memory controller. The memory controller can be used to a. Isolate an application or a group of applications - Memory hungry applications can be isolated and limited to a smaller + Memory-hungry applications can be isolated and limited to a smaller amount of memory. -b. Create a cgroup with limited amount of memory, this can be used +b. Create a cgroup with a limited amount of memory; this can be used as a good alternative to booting with mem=XXXX. c. Virtualization solutions can control the amount of memory they want to assign to a virtual machine instance. d. A CD/DVD burner could control the amount of memory used by the rest of the system to ensure that burning does not fail due to lack of available memory. -e. There are several other use cases, find one or use the controller just +e. There are several other use cases; find one or use the controller just for fun (to learn and hack on the VM subsystem). Current Status: linux-2.6.34-mmotm(development version of 2010/April) @@ -38,12 +38,12 @@ Features: - optionally, memory+swap usage can be accounted and limited. - hierarchical accounting - soft limit - - moving(recharging) account at moving a task is selectable. + - moving (recharging) account at moving a task is selectable. - usage threshold notifier - oom-killer disable knob and oom-notifier - Root cgroup has no limit controls. - Kernel memory support is work in progress, and the current version provides + Kernel memory support is a work in progress, and the current version provides basically functionality. (See Section 2.7) Brief summary of control files. @@ -144,9 +144,9 @@ Figure 1 shows the important aspects of the controller 3. Each page has a pointer to the page_cgroup, which in turn knows the cgroup it belongs to -The accounting is done as follows: mem_cgroup_charge() is invoked to setup +The accounting is done as follows: mem_cgroup_charge() is invoked to set up the necessary data structures and check if the cgroup that is being charged -is over its limit. If it is then reclaim is invoked on the cgroup. +is over its limit. If it is, then reclaim is invoked on the cgroup. More details can be found in the reclaim section of this document. If everything goes well, a page meta-data-structure called page_cgroup is updated. page_cgroup has its own LRU on cgroup. @@ -163,13 +163,13 @@ for earlier. A file page will be accounted for as Page Cache when it's inserted into inode (radix-tree). While it's mapped into the page tables of processes, duplicate accounting is carefully avoided. -A RSS page is unaccounted when it's fully unmapped. A PageCache page is +An RSS page is unaccounted when it's fully unmapped. A PageCache page is unaccounted when it's removed from radix-tree. Even if RSS pages are fully unmapped (by kswapd), they may exist as SwapCache in the system until they -are really freed. Such SwapCaches also also accounted. +are really freed. Such SwapCaches are also accounted. A swapped-in page is not accounted until it's mapped. -Note: The kernel does swapin-readahead and read multiple swaps at once. +Note: The kernel does swapin-readahead and reads multiple swaps at once. This means swapped-in pages may contain pages for other tasks than a task causing page fault. So, we avoid accounting at swap-in I/O. @@ -209,7 +209,7 @@ memsw.limit_in_bytes. Example: Assume a system with 4G of swap. A task which allocates 6G of memory (by mistake) under 2G memory limitation will use all swap. In this case, setting memsw.limit_in_bytes=3G will prevent bad use of swap. -By using memsw limit, you can avoid system OOM which can be caused by swap +By using the memsw limit, you can avoid system OOM which can be caused by swap shortage. * why 'memory+swap' rather than swap. @@ -217,7 +217,7 @@ The global LRU(kswapd) can swap out arbitrary pages. Swap-out means to move account from memory to swap...there is no change in usage of memory+swap. In other words, when we want to limit the usage of swap without affecting global LRU, memory+swap limit is better than just limiting swap from -OS point of view. +an OS point of view. * What happens when a cgroup hits memory.memsw.limit_in_bytes When a cgroup hits memory.memsw.limit_in_bytes, it's useless to do swap-out @@ -236,7 +236,7 @@ an OOM routine is invoked to select and kill the bulkiest task in the cgroup. (See 10. OOM Control below.) The reclaim algorithm has not been modified for cgroups, except that -pages that are selected for reclaiming come from the per cgroup LRU +pages that are selected for reclaiming come from the per-cgroup LRU list. NOTE: Reclaim does not work for the root cgroup, since we cannot set any @@ -316,7 +316,7 @@ We can check the usage: # cat /sys/fs/cgroup/memory/0/memory.usage_in_bytes 1216512 -A successful write to this file does not guarantee a successful set of +A successful write to this file does not guarantee a successful setting of this limit to the value written into the file. This can be due to a number of factors, such as rounding up to page boundaries or the total availability of memory on the system. The user is required to re-read @@ -350,7 +350,7 @@ Trying usual test under memory controller is always helpful. 4.1 Troubleshooting Sometimes a user might find that the application under a cgroup is -terminated by OOM killer. There are several causes for this: +terminated by the OOM killer. There are several causes for this: 1. The cgroup limit is too low (just too low to do anything useful) 2. The user is using anonymous memory and swap is turned off or too low @@ -358,7 +358,7 @@ terminated by OOM killer. There are several causes for this: A sync followed by echo 1 > /proc/sys/vm/drop_caches will help get rid of some of the pages cached in the cgroup (page cache pages). -To know what happens, disable OOM_Kill by 10. OOM Control(see below) and +To know what happens, disabling OOM_Kill as per "10. OOM Control" (below) and seeing what happens will be helpful. 4.2 Task migration @@ -399,10 +399,10 @@ About use_hierarchy, see Section 6. Almost all pages tracked by this memory cgroup will be unmapped and freed. Some pages cannot be freed because they are locked or in-use. Such pages are - moved to parent(if use_hierarchy==1) or root (if use_hierarchy==0) and this + moved to parent (if use_hierarchy==1) or root (if use_hierarchy==0) and this cgroup will be empty. - Typical use case of this interface is that calling this before rmdir(). + The typical use case for this interface is before calling rmdir(). Because rmdir() moves all pages to parent, some out-of-use page caches can be moved to the parent. If you want to avoid that, force_empty will be useful. @@ -486,7 +486,7 @@ You can reset failcnt by writing 0 to failcnt file. For efficiency, as other kernel components, memory cgroup uses some optimization to avoid unnecessary cacheline false sharing. usage_in_bytes is affected by the -method and doesn't show 'exact' value of memory(and swap) usage, it's an fuzz +method and doesn't show 'exact' value of memory (and swap) usage, it's a fuzz value for efficient access. (Of course, when necessary, it's synchronized.) If you want to know more exact memory usage, you should use RSS+CACHE(+SWAP) value in memory.stat(see 5.2). @@ -496,8 +496,8 @@ value in memory.stat(see 5.2). This is similar to numa_maps but operates on a per-memcg basis. This is useful for providing visibility into the numa locality information within an memcg since the pages are allowed to be allocated from any physical -node. One of the usecases is evaluating application performance by -combining this information with the application's cpu allocation. +node. One of the use cases is evaluating application performance by +combining this information with the application's CPU allocation. We export "total", "file", "anon" and "unevictable" pages per-node for each memcg. The ouput format of memory.numa_stat is: @@ -561,10 +561,10 @@ are pushed back to their soft limits. If the soft limit of each control group is very high, they are pushed back as much as possible to make sure that one control group does not starve the others of memory. -Please note that soft limits is a best effort feature, it comes with +Please note that soft limits is a best-effort feature; it comes with no guarantees, but it does its best to make sure that when memory is heavily contended for, memory is allocated based on the soft limit -hints/setup. Currently soft limit based reclaim is setup such that +hints/setup. Currently soft limit based reclaim is set up such that it gets invoked from balance_pgdat (kswapd). 7.1 Interface @@ -592,7 +592,7 @@ page tables. 8.1 Interface -This feature is disabled by default. It can be enabled(and disabled again) by +This feature is disabled by default. It can be enabledi (and disabled again) by writing to memory.move_charge_at_immigrate of the destination cgroup. If you want to enable it: @@ -601,8 +601,8 @@ If you want to enable it: Note: Each bits of move_charge_at_immigrate has its own meaning about what type of charges should be moved. See 8.2 for details. -Note: Charges are moved only when you move mm->owner, IOW, a leader of a thread - group. +Note: Charges are moved only when you move mm->owner, in other words, + a leader of a thread group. Note: If we cannot find enough space for the task in the destination cgroup, we try to make space by reclaiming memory. Task migration may fail if we cannot make enough space. @@ -612,25 +612,25 @@ And if you want disable it again: # echo 0 > memory.move_charge_at_immigrate -8.2 Type of charges which can be move +8.2 Type of charges which can be moved -Each bits of move_charge_at_immigrate has its own meaning about what type of -charges should be moved. But in any cases, it must be noted that an account of -a page or a swap can be moved only when it is charged to the task's current(old) -memory cgroup. +Each bit in move_charge_at_immigrate has its own meaning about what type of +charges should be moved. But in any case, it must be noted that an account of +a page or a swap can be moved only when it is charged to the task's current +(old) memory cgroup. bit | what type of charges would be moved ? -----+------------------------------------------------------------------------ - 0 | A charge of an anonymous page(or swap of it) used by the target task. - | You must enable Swap Extension(see 2.4) to enable move of swap charges. + 0 | A charge of an anonymous page (or swap of it) used by the target task. + | You must enable Swap Extension (see 2.4) to enable move of swap charges. -----+------------------------------------------------------------------------ - 1 | A charge of file pages(normal file, tmpfs file(e.g. ipc shared memory) + 1 | A charge of file pages (normal file, tmpfs file (e.g. ipc shared memory) | and swaps of tmpfs file) mmapped by the target task. Unlike the case of - | anonymous pages, file pages(and swaps) in the range mmapped by the task + | anonymous pages, file pages (and swaps) in the range mmapped by the task | will be moved even if the task hasn't done page fault, i.e. they might | not be the task's "RSS", but other task's "RSS" that maps the same file. - | And mapcount of the page is ignored(the page can be moved even if - | page_mapcount(page) > 1). You must enable Swap Extension(see 2.4) to + | And mapcount of the page is ignored (the page can be moved even if + | page_mapcount(page) > 1). You must enable Swap Extension (see 2.4) to | enable move of swap charges. 8.3 TODO @@ -640,11 +640,11 @@ memory cgroup. 9. Memory thresholds -Memory cgroup implements memory thresholds using cgroups notification +Memory cgroup implements memory thresholds using the cgroups notification API (see cgroups.txt). It allows to register multiple memory and memsw thresholds and gets notifications when it crosses. -To register a threshold application need: +To register a threshold, an application must: - create an eventfd using eventfd(2); - open memory.usage_in_bytes or memory.memsw.usage_in_bytes; - write string like "<event_fd> <fd of memory.usage_in_bytes> <threshold>" to @@ -659,24 +659,24 @@ It's applicable for root and non-root cgroup. memory.oom_control file is for OOM notification and other controls. -Memory cgroup implements OOM notifier using cgroup notification +Memory cgroup implements OOM notifier using the cgroup notification API (See cgroups.txt). It allows to register multiple OOM notification delivery and gets notification when OOM happens. -To register a notifier, application need: +To register a notifier, an application must: - create an eventfd using eventfd(2) - open memory.oom_control file - write string like "<event_fd> <fd of memory.oom_control>" to cgroup.event_control -Application will be notified through eventfd when OOM happens. -OOM notification doesn't work for root cgroup. +The application will be notified through eventfd when OOM happens. +OOM notification doesn't work for the root cgroup. -You can disable OOM-killer by writing "1" to memory.oom_control file, as: +You can disable the OOM-killer by writing "1" to memory.oom_control file, as: #echo 1 > memory.oom_control -This operation is only allowed to the top cgroup of sub-hierarchy. +This operation is only allowed to the top cgroup of a sub-hierarchy. If OOM-killer is disabled, tasks under cgroup will hang/sleep in memory cgroup's OOM-waitqueue when they request accountable memory. diff --git a/Documentation/devicetree/bindings/arm/davinci/nand.txt b/Documentation/devicetree/bindings/arm/davinci/nand.txt new file mode 100644 index 000000000000..e37241f1fdd8 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/davinci/nand.txt @@ -0,0 +1,51 @@ +* Texas Instruments Davinci NAND + +This file provides information, what the device node for the +davinci nand interface contain. + +Required properties: +- compatible: "ti,davinci-nand"; +- reg : contain 2 offset/length values: + - offset and length for the access window + - offset and length for accessing the aemif control registers +- ti,davinci-chipselect: Indicates on the davinci_nand driver which + chipselect is used for accessing the nand. + +Recommended properties : +- ti,davinci-mask-ale: mask for ale +- ti,davinci-mask-cle: mask for cle +- ti,davinci-mask-chipsel: mask for chipselect +- ti,davinci-ecc-mode: ECC mode valid values for davinci driver: + - "none" + - "soft" + - "hw" +- ti,davinci-ecc-bits: used ECC bits, currently supported 1 or 4. +- ti,davinci-nand-buswidth: buswidth 8 or 16 +- ti,davinci-nand-use-bbt: use flash based bad block table support. + +Example (enbw_cmc board): +aemif@60000000 { + compatible = "ti,davinci-aemif"; + #address-cells = <2>; + #size-cells = <1>; + reg = <0x68000000 0x80000>; + ranges = <2 0 0x60000000 0x02000000 + 3 0 0x62000000 0x02000000 + 4 0 0x64000000 0x02000000 + 5 0 0x66000000 0x02000000 + 6 0 0x68000000 0x02000000>; + nand@3,0 { + compatible = "ti,davinci-nand"; + reg = <3 0x0 0x807ff + 6 0x0 0x8000>; + #address-cells = <1>; + #size-cells = <1>; + ti,davinci-chipselect = <1>; + ti,davinci-mask-ale = <0>; + ti,davinci-mask-cle = <0>; + ti,davinci-mask-chipsel = <0>; + ti,davinci-ecc-mode = "hw"; + ti,davinci-ecc-bits = <4>; + ti,davinci-nand-use-bbt; + }; +}; diff --git a/Documentation/devicetree/bindings/i2c/atmel-i2c.txt b/Documentation/devicetree/bindings/i2c/atmel-i2c.txt new file mode 100644 index 000000000000..b689a0d9441c --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/atmel-i2c.txt @@ -0,0 +1,30 @@ +I2C for Atmel platforms + +Required properties : +- compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c", + "atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c" + or "atmel,at91sam9x5-i2c" +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: interrupt number to the cpu. +- #address-cells = <1>; +- #size-cells = <0>; + +Optional properties: +- Child nodes conforming to i2c bus binding + +Examples : + +i2c0: i2c@fff84000 { + compatible = "atmel,at91sam9g20-i2c"; + reg = <0xfff84000 0x100>; + interrupts = <12 4 6>; + #address-cells = <1>; + #size-cells = <0>; + + 24c512@50 { + compatible = "24c512"; + reg = <0x50>; + pagesize = <128>; + } +} diff --git a/Documentation/devicetree/bindings/i2c/davinci.txt b/Documentation/devicetree/bindings/i2c/davinci.txt new file mode 100644 index 000000000000..2dc935b4113d --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/davinci.txt @@ -0,0 +1,28 @@ +* Texas Instruments Davinci I2C + +This file provides information, what the device node for the +davinci i2c interface contain. + +Required properties: +- compatible: "ti,davinci-i2c"; +- reg : Offset and length of the register set for the device + +Recommended properties : +- interrupts : standard interrupt property. +- clock-frequency : desired I2C bus clock frequency in Hz. + +Example (enbw_cmc board): + i2c@1c22000 { + compatible = "ti,davinci-i2c"; + reg = <0x22000 0x1000>; + clock-frequency = <100000>; + interrupts = <15>; + interrupt-parent = <&intc>; + #address-cells = <1>; + #size-cells = <0>; + + dtt@48 { + compatible = "national,lm75"; + reg = <0x48>; + }; + }; diff --git a/Documentation/devicetree/bindings/i2c/i2c-mxs.txt b/Documentation/devicetree/bindings/i2c/i2c-mxs.txt index 30ac3a0557f7..7a3fe9e5f4cb 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-mxs.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-mxs.txt @@ -6,6 +6,7 @@ Required properties: - interrupts: Should contain ERROR and DMA interrupts - clock-frequency: Desired I2C bus clock frequency in Hz. Only 100000Hz and 400000Hz modes are supported. +- fsl,i2c-dma-channel: APBX DMA channel for the I2C Examples: @@ -16,4 +17,5 @@ i2c0: i2c@80058000 { reg = <0x80058000 2000>; interrupts = <111 68>; clock-frequency = <100000>; + fsl,i2c-dma-channel = <6>; }; diff --git a/Documentation/devicetree/bindings/i2c/nomadik.txt b/Documentation/devicetree/bindings/i2c/nomadik.txt new file mode 100644 index 000000000000..72065b0ff680 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/nomadik.txt @@ -0,0 +1,23 @@ +I2C for Nomadik based systems + +Required (non-standard) properties: + - Nil + +Recommended (non-standard) properties: + - clock-frequency : Maximum bus clock frequency for the device + +Optional (non-standard) properties: + - Nil + +Example : + +i2c@80004000 { + compatible = "stericsson,db8500-i2c", "st,nomadik-i2c"; + reg = <0x80004000 0x1000>; + interrupts = <0 21 0x4>; + #address-cells = <1>; + #size-cells = <0>; + v-i2c-supply = <&db8500_vape_reg>; + + clock-frequency = <400000>; +}; diff --git a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt index 548892c08c59..7da578d72123 100644 --- a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt +++ b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt @@ -7,7 +7,7 @@ as "armctrl" in the SoC documentation, hence naming of this binding. Required properties: -- compatible : should be "brcm,bcm2835-armctrl-ic.txt" +- compatible : should be "brcm,bcm2835-armctrl-ic" - reg : Specifies base physical address and size of the registers. - interrupt-controller : Identifies the node as an interrupt controller - #interrupt-cells : Specifies the number of cells needed to encode an diff --git a/Documentation/devicetree/bindings/mmc/atmel-hsmci.txt b/Documentation/devicetree/bindings/mmc/atmel-hsmci.txt new file mode 100644 index 000000000000..0a85c70cd30a --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/atmel-hsmci.txt @@ -0,0 +1,68 @@ +* Atmel High Speed MultiMedia Card Interface + +This controller on atmel products provides an interface for MMC, SD and SDIO +types of memory cards. + +This file documents differences between the core properties described +by mmc.txt and the properties used by the atmel-mci driver. + +1) MCI node + +Required properties: +- compatible: should be "atmel,hsmci" +- #address-cells: should be one. The cell is the slot id. +- #size-cells: should be zero. +- at least one slot node + +The node contains child nodes for each slot that the platform uses + +Example MCI node: + +mmc0: mmc@f0008000 { + compatible = "atmel,hsmci"; + reg = <0xf0008000 0x600>; + interrupts = <12 4>; + #address-cells = <1>; + #size-cells = <0>; + + [ child node definitions...] +}; + +2) slot nodes + +Required properties: +- reg: should contain the slot id. +- bus-width: number of data lines connected to the controller + +Optional properties: +- cd-gpios: specify GPIOs for card detection +- cd-inverted: invert the value of external card detect gpio line +- wp-gpios: specify GPIOs for write protection + +Example slot node: + +slot@0 { + reg = <0>; + bus-width = <4>; + cd-gpios = <&pioD 15 0> + cd-inverted; +}; + +Example full MCI node: +mmc0: mmc@f0008000 { + compatible = "atmel,hsmci"; + reg = <0xf0008000 0x600>; + interrupts = <12 4>; + #address-cells = <1>; + #size-cells = <0>; + slot@0 { + reg = <0>; + bus-width = <4>; + cd-gpios = <&pioD 15 0> + cd-inverted; + }; + slot@1 { + reg = <1>; + bus-width = <4>; + }; +}; diff --git a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt new file mode 100644 index 000000000000..792768953330 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt @@ -0,0 +1,87 @@ +* Samsung Exynos specific extensions to the Synopsis Designware Mobile + Storage Host Controller + +The Synopsis designware mobile storage host controller is used to interface +a SoC with storage medium such as eMMC or SD/MMC cards. This file documents +differences between the core Synopsis dw mshc controller properties described +by synposis-dw-mshc.txt and the properties used by the Samsung Exynos specific +extensions to the Synopsis Designware Mobile Storage Host Controller. + +Required Properties: + +* compatible: should be + - "samsung,exynos4210-dw-mshc": for controllers with Samsung Exynos4210 + specific extentions. + - "samsung,exynos4412-dw-mshc": for controllers with Samsung Exynos4412 + specific extentions. + - "samsung,exynos5250-dw-mshc": for controllers with Samsung Exynos5250 + specific extentions. + +* samsung,dw-mshc-ciu-div: Specifies the divider value for the card interface + unit (ciu) clock. This property is applicable only for Exynos5 SoC's and + ignored for Exynos4 SoC's. The valid range of divider value is 0 to 7. + +* samsung,dw-mshc-sdr-timing: Specifies the value of CIU clock phase shift value + in transmit mode and CIU clock phase shift value in receive mode for single + data rate mode operation. Refer notes below for the order of the cells and the + valid values. + +* samsung,dw-mshc-ddr-timing: Specifies the value of CUI clock phase shift value + in transmit mode and CIU clock phase shift value in receive mode for double + data rate mode operation. Refer notes below for the order of the cells and the + valid values. + + Notes for the sdr-timing and ddr-timing values: + + The order of the cells should be + - First Cell: CIU clock phase shift value for tx mode. + - Second Cell: CIU clock phase shift value for rx mode. + + Valid values for SDR and DDR CIU clock timing for Exynos5250: + - valid value for tx phase shift and rx phase shift is 0 to 7. + - when CIU clock divider value is set to 3, all possible 8 phase shift + values can be used. + - if CIU clock divider value is 0 (that is divide by 1), both tx and rx + phase shift clocks should be 0. + +Required properties for a slot: + +* gpios: specifies a list of gpios used for command, clock and data bus. The + first gpio is the command line and the second gpio is the clock line. The + rest of the gpios (depending on the bus-width property) are the data lines in + no particular order. The format of the gpio specifier depends on the gpio + controller. + +Example: + + The MSHC controller node can be split into two portions, SoC specific and + board specific portions as listed below. + + dwmmc0@12200000 { + compatible = "samsung,exynos5250-dw-mshc"; + reg = <0x12200000 0x1000>; + interrupts = <0 75 0>; + #address-cells = <1>; + #size-cells = <0>; + }; + + dwmmc0@12200000 { + num-slots = <1>; + supports-highspeed; + broken-cd; + fifo-depth = <0x80>; + card-detect-delay = <200>; + samsung,dw-mshc-ciu-div = <3>; + samsung,dw-mshc-sdr-timing = <2 3>; + samsung,dw-mshc-ddr-timing = <1 2>; + + slot@0 { + reg = <0>; + bus-width = <8>; + gpios = <&gpc0 0 2 0 3>, <&gpc0 1 2 0 3>, + <&gpc1 0 2 3 3>, <&gpc1 1 2 3 3>, + <&gpc1 2 2 3 3>, <&gpc1 3 2 3 3>, + <&gpc0 3 2 3 3>, <&gpc0 4 2 3 3>, + <&gpc0 5 2 3 3>, <&gpc0 6 2 3 3>; + }; + }; diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 8a6811f4a02f..8e2e0ba2f486 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -9,12 +9,17 @@ Interpreted by the OF core: Required properties: - bus-width: Number of data lines, can be <1>, <4>, or <8> +Card detection: +If no property below is supplied, standard SDHCI card detect is used. +Only one of the properties in this section should be supplied: + - broken-cd: There is no card detection available; polling must be used. + - cd-gpios: Specify GPIOs for card detection, see gpio binding + - non-removable: non-removable slot (like eMMC); assume always present. + Optional properties: -- cd-gpios: Specify GPIOs for card detection, see gpio binding - wp-gpios: Specify GPIOs for write protection, see gpio binding - cd-inverted: when present, polarity on the cd gpio line is inverted - wp-inverted: when present, polarity on the wp gpio line is inverted -- non-removable: non-removable slot (like eMMC) - max-frequency: maximum operating clock frequency Example: diff --git a/Documentation/devicetree/bindings/mmc/pxa-mmc.txt b/Documentation/devicetree/bindings/mmc/pxa-mmc.txt new file mode 100644 index 000000000000..b7025de7dced --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/pxa-mmc.txt @@ -0,0 +1,25 @@ +* PXA MMC drivers + +Driver bindings for the PXA MCI (MMC/SDIO) interfaces + +Required properties: +- compatible: Should be "marvell,pxa-mmc". +- vmmc-supply: A regulator for VMMC + +Optional properties: +- marvell,detect-delay-ms: sets the detection delay timeout in ms. +- marvell,gpio-power: GPIO spec for the card power enable pin + +This file documents differences between the core properties in mmc.txt +and the properties used by the pxa-mmc driver. + +Examples: + +mmc0: mmc@41100000 { + compatible = "marvell,pxa-mmc"; + reg = <0x41100000 0x1000>; + interrupts = <23>; + cd-gpios = <&gpio 23 0>; + wp-gpios = <&gpio 24 0>; +}; + diff --git a/Documentation/devicetree/bindings/mmc/samsung-sdhci.txt b/Documentation/devicetree/bindings/mmc/samsung-sdhci.txt new file mode 100644 index 000000000000..630a7d7f4718 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/samsung-sdhci.txt @@ -0,0 +1,53 @@ +* Samsung's SDHCI Controller device tree bindings + +Samsung's SDHCI controller is used as a connectivity interface with external +MMC, SD and eMMC storage mediums. This file documents differences between the +core mmc properties described by mmc.txt and the properties used by the +Samsung implmentation of the SDHCI controller. + +Note: The mmc core bindings documentation states that if none of the core +card-detect bindings are used, then the standard sdhci card detect mechanism +is used. The Samsung's SDHCI controller bindings extends this as listed below. + +[A] The property "samsung,cd-pinmux-gpio" can be used as stated in the + "Optional Board Specific Properties" section below. + +[B] If core card-detect bindings and "samsung,cd-pinmux-gpio" property + is not specified, it is assumed that there is no card detection + mechanism used. + +Required SoC Specific Properties: +- compatible: should be one of the following + - "samsung,s3c6410-sdhci": For controllers compatible with s3c6410 sdhci + controller. + - "samsung,exynos4210-sdhci": For controllers compatible with Exynos4 sdhci + controller. + +Required Board Specific Properties: +- gpios: Should specify the gpios used for clock, command and data lines. The + gpio specifier format depends on the gpio controller. + +Optional Board Specific Properties: +- samsung,cd-pinmux-gpio: Specifies the card detect line that is routed + through a pinmux to the card-detect pin of the card slot. This property + should be used only if none of the mmc core card-detect properties are + used. + +Example: + sdhci@12530000 { + compatible = "samsung,exynos4210-sdhci"; + reg = <0x12530000 0x100>; + interrupts = <0 75 0>; + bus-width = <4>; + cd-gpios = <&gpk2 2 2 3 3>; + gpios = <&gpk2 0 2 0 3>, /* clock line */ + <&gpk2 1 2 0 3>, /* command line */ + <&gpk2 3 2 3 3>, /* data line 0 */ + <&gpk2 4 2 3 3>, /* data line 1 */ + <&gpk2 5 2 3 3>, /* data line 2 */ + <&gpk2 6 2 3 3>; /* data line 3 */ + }; + + Note: This example shows both SoC specific and board specific properties + in a single device node. The properties can be actually be seperated + into SoC specific node and board specific node. diff --git a/Documentation/devicetree/bindings/mmc/sdhci-dove.txt b/Documentation/devicetree/bindings/mmc/sdhci-dove.txt new file mode 100644 index 000000000000..ae9aab9abcd7 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci-dove.txt @@ -0,0 +1,14 @@ +* Marvell sdhci-dove controller + +This file documents differences between the core properties in mmc.txt +and the properties used by the sdhci-pxav2 and sdhci-pxav3 drivers. + +- compatible: Should be "marvell,dove-sdhci". + +Example: + +sdio0: sdio@92000 { + compatible = "marvell,dove-sdhci"; + reg = <0x92000 0x100>; + interrupts = <35>; +}; diff --git a/Documentation/devicetree/bindings/mmc/sdhci-spear.txt b/Documentation/devicetree/bindings/mmc/sdhci-spear.txt new file mode 100644 index 000000000000..fd3643e7e467 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci-spear.txt @@ -0,0 +1,18 @@ +* SPEAr SDHCI Controller + +This file documents differences between the core properties in mmc.txt +and the properties used by the sdhci-spear driver. + +Required properties: +- compatible: "st,spear300-sdhci" + +Optional properties: +- cd-gpios: card detect gpio, with zero flags. + +Example: + + sdhci@fc000000 { + compatible = "st,spear300-sdhci"; + reg = <0xfc000000 0x1000>; + cd-gpios = <&gpio0 6 0>; + }; diff --git a/Documentation/devicetree/bindings/mmc/synposis-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/synposis-dw-mshc.txt new file mode 100644 index 000000000000..06cd32d08052 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/synposis-dw-mshc.txt @@ -0,0 +1,79 @@ +* Synopsis Designware Mobile Storage Host Controller + +The Synopsis designware mobile storage host controller is used to interface +a SoC with storage medium such as eMMC or SD/MMC cards. This file documents +differences between the core mmc properties described by mmc.txt and the +properties used by the Synopsis Designware Mobile Storage Host Controller. + +Required Properties: + +* compatible: should be + - snps,dw-mshc: for controllers compliant with synopsis dw-mshc. +* #address-cells: should be 1. +* #size-cells: should be 0. + +# Slots: The slot specific information are contained within child-nodes with + each child-node representing a supported slot. There should be atleast one + child node representing a card slot. The name of the child node representing + the slot is recommended to be slot@n where n is the unique number of the slot + connnected to the controller. The following are optional properties which + can be included in the slot child node. + + * reg: specifies the physical slot number. The valid values of this + property is 0 to (num-slots -1), where num-slots is the value + specified by the num-slots property. + + * bus-width: as documented in mmc core bindings. + + * wp-gpios: specifies the write protect gpio line. The format of the + gpio specifier depends on the gpio controller. If the write-protect + line is not available, this property is optional. + +Optional properties: + +* num-slots: specifies the number of slots supported by the controller. + The number of physical slots actually used could be equal or less than the + value specified by num-slots. If this property is not specified, the value + of num-slot property is assumed to be 1. + +* fifo-depth: The maximum size of the tx/rx fifo's. If this property is not + specified, the default value of the fifo size is determined from the + controller registers. + +* card-detect-delay: Delay in milli-seconds before detecting card after card + insert event. The default value is 0. + +* supports-highspeed: Enables support for high speed cards (upto 50MHz) + +* broken-cd: as documented in mmc core bindings. + +Aliases: + +- All the MSHC controller nodes should be represented in the aliases node using + the following format 'mshc{n}' where n is a unique number for the alias. + +Example: + +The MSHC controller node can be split into two portions, SoC specific and +board specific portions as listed below. + + dwmmc0@12200000 { + compatible = "snps,dw-mshc"; + reg = <0x12200000 0x1000>; + interrupts = <0 75 0>; + #address-cells = <1>; + #size-cells = <0>; + }; + + dwmmc0@12200000 { + num-slots = <1>; + supports-highspeed; + broken-cd; + fifo-depth = <0x80>; + card-detect-delay = <200>; + + slot@0 { + reg = <0>; + bus-width = <8>; + }; + }; diff --git a/Documentation/devicetree/bindings/mtd/atmel-nand.txt b/Documentation/devicetree/bindings/mtd/atmel-nand.txt index a20069502f5a..d555421ea49f 100644 --- a/Documentation/devicetree/bindings/mtd/atmel-nand.txt +++ b/Documentation/devicetree/bindings/mtd/atmel-nand.txt @@ -3,7 +3,9 @@ Atmel NAND flash Required properties: - compatible : "atmel,at91rm9200-nand". - reg : should specify localbus address and size used for the chip, - and if availlable the ECC. + and hardware ECC controller if available. + If the hardware ECC is PMECC, it should contain address and size for + PMECC, PMECC Error Location controller and ROM which has lookup tables. - atmel,nand-addr-offset : offset for the address latch. - atmel,nand-cmd-offset : offset for the command latch. - #address-cells, #size-cells : Must be present if the device has sub-nodes @@ -16,6 +18,15 @@ Optional properties: - nand-ecc-mode : String, operation mode of the NAND ecc mode, soft by default. Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first", "soft_bch". +- atmel,has-pmecc : boolean to enable Programmable Multibit ECC hardware. + Only supported by at91sam9x5 or later sam9 product. +- atmel,pmecc-cap : error correct capability for Programmable Multibit ECC + Controller. Supported values are: 2, 4, 8, 12, 24. +- atmel,pmecc-sector-size : sector size for ECC computation. Supported values + are: 512, 1024. +- atmel,pmecc-lookup-table-offset : includes two offsets of lookup table in ROM + for different sector size. First one is for sector size 512, the next is for + sector size 1024. - nand-bus-width : 8 or 16 bus width if not present 8 - nand-on-flash-bbt: boolean to enable on flash bbt option if not present false @@ -39,3 +50,30 @@ nand0: nand@40000000,0 { ... }; }; + +/* for PMECC supported chips */ +nand0: nand@40000000 { + compatible = "atmel,at91rm9200-nand"; + #address-cells = <1>; + #size-cells = <1>; + reg = < 0x40000000 0x10000000 /* bus addr & size */ + 0xffffe000 0x00000600 /* PMECC addr & size */ + 0xffffe600 0x00000200 /* PMECC ERRLOC addr & size */ + 0x00100000 0x00100000 /* ROM addr & size */ + >; + atmel,nand-addr-offset = <21>; /* ale */ + atmel,nand-cmd-offset = <22>; /* cle */ + nand-on-flash-bbt; + nand-ecc-mode = "hw"; + atmel,has-pmecc; /* enable PMECC */ + atmel,pmecc-cap = <2>; + atmel,pmecc-sector-size = <512>; + atmel,pmecc-lookup-table-offset = <0x8000 0x10000>; + gpios = <&pioD 5 0 /* rdy */ + &pioD 4 0 /* nce */ + 0 /* cd */ + >; + partition@0 { + ... + }; +}; diff --git a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt index 1a5bbd346d22..3fb3f9015365 100644 --- a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt +++ b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt @@ -12,6 +12,10 @@ Required properties: - interrupt-names : The interrupt names "gpmi-dma", "bch"; - fsl,gpmi-dma-channel : Should contain the dma channel it uses. +Optional properties: + - nand-on-flash-bbt: boolean to enable on flash bbt option if not + present false + The device tree may optionally contain sub-nodes describing partitions of the address space. See partition.txt for more detail. diff --git a/Documentation/devicetree/bindings/mtd/lpc32xx-mlc.txt b/Documentation/devicetree/bindings/mtd/lpc32xx-mlc.txt new file mode 100644 index 000000000000..d0a37252eb22 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/lpc32xx-mlc.txt @@ -0,0 +1,50 @@ +NXP LPC32xx SoC NAND MLC controller + +Required properties: +- compatible: "nxp,lpc3220-mlc" +- reg: Address and size of the controller +- interrupts: The NAND interrupt specification +- gpios: GPIO specification for NAND write protect + +The following required properties are very controller specific. See the LPC32xx +User Manual 7.5.14 MLC NAND Timing Register (the values here are specified in +Hz, to make them independent of actual clock speed and to provide for good +accuracy:) +- nxp,tcea_delay: TCEA_DELAY +- nxp,busy_delay: BUSY_DELAY +- nxp,nand_ta: NAND_TA +- nxp,rd_high: RD_HIGH +- nxp,rd_low: RD_LOW +- nxp,wr_high: WR_HIGH +- nxp,wr_low: WR_LOW + +Optional subnodes: +- Partitions, see Documentation/devicetree/bindings/mtd/partition.txt + +Example: + + mlc: flash@200A8000 { + compatible = "nxp,lpc3220-mlc"; + reg = <0x200A8000 0x11000>; + interrupts = <11 0>; + #address-cells = <1>; + #size-cells = <1>; + + nxp,tcea-delay = <333333333>; + nxp,busy-delay = <10000000>; + nxp,nand-ta = <18181818>; + nxp,rd-high = <31250000>; + nxp,rd-low = <45454545>; + nxp,wr-high = <40000000>; + nxp,wr-low = <83333333>; + gpios = <&gpio 5 19 1>; /* GPO_P3 19, active low */ + + mtd0@00000000 { + label = "boot"; + reg = <0x00000000 0x00064000>; + read-only; + }; + + ... + + }; diff --git a/Documentation/devicetree/bindings/mtd/lpc32xx-slc.txt b/Documentation/devicetree/bindings/mtd/lpc32xx-slc.txt new file mode 100644 index 000000000000..d94edc0fc554 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/lpc32xx-slc.txt @@ -0,0 +1,52 @@ +NXP LPC32xx SoC NAND SLC controller + +Required properties: +- compatible: "nxp,lpc3220-slc" +- reg: Address and size of the controller +- nand-on-flash-bbt: Use bad block table on flash +- gpios: GPIO specification for NAND write protect + +The following required properties are very controller specific. See the LPC32xx +User Manual: +- nxp,wdr-clks: Delay before Ready signal is tested on write (W_RDY) +- nxp,rdr-clks: Delay before Ready signal is tested on read (R_RDY) +(The following values are specified in Hz, to make them independent of actual +clock speed:) +- nxp,wwidth: Write pulse width (W_WIDTH) +- nxp,whold: Write hold time (W_HOLD) +- nxp,wsetup: Write setup time (W_SETUP) +- nxp,rwidth: Read pulse width (R_WIDTH) +- nxp,rhold: Read hold time (R_HOLD) +- nxp,rsetup: Read setup time (R_SETUP) + +Optional subnodes: +- Partitions, see Documentation/devicetree/bindings/mtd/partition.txt + +Example: + + slc: flash@20020000 { + compatible = "nxp,lpc3220-slc"; + reg = <0x20020000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + + nxp,wdr-clks = <14>; + nxp,wwidth = <40000000>; + nxp,whold = <100000000>; + nxp,wsetup = <100000000>; + nxp,rdr-clks = <14>; + nxp,rwidth = <40000000>; + nxp,rhold = <66666666>; + nxp,rsetup = <100000000>; + nand-on-flash-bbt; + gpios = <&gpio 5 19 1>; /* GPO_P3 19, active low */ + + mtd0@00000000 { + label = "phy3250-boot"; + reg = <0x00000000 0x00064000>; + read-only; + }; + + ... + + }; diff --git a/Documentation/devicetree/bindings/mtd/mtd-physmap.txt b/Documentation/devicetree/bindings/mtd/mtd-physmap.txt index a63c2bd7de2b..94de19b8f16b 100644 --- a/Documentation/devicetree/bindings/mtd/mtd-physmap.txt +++ b/Documentation/devicetree/bindings/mtd/mtd-physmap.txt @@ -16,6 +16,13 @@ file systems on embedded devices. - #address-cells, #size-cells : Must be present if the device has sub-nodes representing partitions (see below). In this case both #address-cells and #size-cells must be equal to 1. + - no-unaligned-direct-access: boolean to disable the default direct + mapping of the flash. + On some platforms (e.g. MPC5200) a direct 1:1 mapping may cause + problems with JFFS2 usage, as the local bus (LPB) doesn't support + unaligned accesses as implemented in the JFFS2 code via memcpy(). + By defining "no-unaligned-direct-access", the flash will not be + exposed directly to the MTD users (e.g. JFFS2) any more. For JEDEC compatible devices, the following additional properties are defined: diff --git a/Documentation/devicetree/bindings/pinctrl/lantiq,falcon-pinumx.txt b/Documentation/devicetree/bindings/pinctrl/lantiq,falcon-pinumx.txt new file mode 100644 index 000000000000..daa768956069 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/lantiq,falcon-pinumx.txt @@ -0,0 +1,83 @@ +Lantiq FALCON pinmux controller + +Required properties: +- compatible: "lantiq,pinctrl-falcon" +- reg: Should contain the physical address and length of the gpio/pinmux + register range + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the meaning of the +phrase "pin configuration node". + +Lantiq's pin configuration nodes act as a container for an abitrary number of +subnodes. Each of these subnodes represents some desired configuration for a +pin, a group, or a list of pins or groups. This configuration can include the +mux function to select on those group(s), and two pin configuration parameters: +pull-up and open-drain + +The name of each subnode is not important as long as it is unique; all subnodes +should be enumerated and processed purely based on their content. + +Each subnode only affects those parameters that are explicitly listed. In +other words, a subnode that lists a mux function but no pin configuration +parameters implies no information about any pin configuration parameters. +Similarly, a pin subnode that describes a pullup parameter implies no +information about e.g. the mux function. + +We support 2 types of nodes. + +Definition of mux function groups: + +Required subnode-properties: +- lantiq,groups : An array of strings. Each string contains the name of a group. + Valid values for these names are listed below. +- lantiq,function: A string containing the name of the function to mux to the + group. Valid values for function names are listed below. + +Valid values for group and function names: + + mux groups: + por, ntr, ntr8k, hrst, mdio, bootled, asc0, spi, spi cs0, spi cs1, i2c, + jtag, slic, pcm, asc1 + + functions: + rst, ntr, mdio, led, asc, spi, i2c, jtag, slic, pcm + + +Definition of pin configurations: + +Required subnode-properties: +- lantiq,pins : An array of strings. Each string contains the name of a pin. + Valid values for these names are listed below. + +Optional subnode-properties: +- lantiq,pull: Integer, representing the pull-down/up to apply to the pin. + 0: none, 1: down +- lantiq,drive-current: Boolean, enables drive-current +- lantiq,slew-rate: Boolean, enables slew-rate + +Example: + pinmux0 { + compatible = "lantiq,pinctrl-falcon"; + pinctrl-names = "default"; + pinctrl-0 = <&state_default>; + + state_default: pinmux { + asc0 { + lantiq,groups = "asc0"; + lantiq,function = "asc"; + }; + ntr { + lantiq,groups = "ntr8k"; + lantiq,function = "ntr"; + }; + i2c { + lantiq,groups = "i2c"; + lantiq,function = "i2c"; + }; + hrst { + lantiq,groups = "hrst"; + lantiq,function = "rst"; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/pinctrl/lantiq,xway-pinumx.txt b/Documentation/devicetree/bindings/pinctrl/lantiq,xway-pinumx.txt new file mode 100644 index 000000000000..b5469db1d7ad --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/lantiq,xway-pinumx.txt @@ -0,0 +1,97 @@ +Lantiq XWAY pinmux controller + +Required properties: +- compatible: "lantiq,pinctrl-xway" or "lantiq,pinctrl-xr9" +- reg: Should contain the physical address and length of the gpio/pinmux + register range + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the meaning of the +phrase "pin configuration node". + +Lantiq's pin configuration nodes act as a container for an abitrary number of +subnodes. Each of these subnodes represents some desired configuration for a +pin, a group, or a list of pins or groups. This configuration can include the +mux function to select on those group(s), and two pin configuration parameters: +pull-up and open-drain + +The name of each subnode is not important as long as it is unique; all subnodes +should be enumerated and processed purely based on their content. + +Each subnode only affects those parameters that are explicitly listed. In +other words, a subnode that lists a mux function but no pin configuration +parameters implies no information about any pin configuration parameters. +Similarly, a pin subnode that describes a pullup parameter implies no +information about e.g. the mux function. + +We support 2 types of nodes. + +Definition of mux function groups: + +Required subnode-properties: +- lantiq,groups : An array of strings. Each string contains the name of a group. + Valid values for these names are listed below. +- lantiq,function: A string containing the name of the function to mux to the + group. Valid values for function names are listed below. + +Valid values for group and function names: + + mux groups: + exin0, exin1, exin2, jtag, ebu a23, ebu a24, ebu a25, ebu clk, ebu cs1, + ebu wait, nand ale, nand cs1, nand cle, spi, spi_cs1, spi_cs2, spi_cs3, + spi_cs4, spi_cs5, spi_cs6, asc0, asc0 cts rts, stp, nmi , gpt1, gpt2, + gpt3, clkout0, clkout1, clkout2, clkout3, gnt1, gnt2, gnt3, req1, req2, + req3 + + additional mux groups (XR9 only): + mdio, nand rdy, nand rd, exin3, exin4, gnt4, req4 + + functions: + spi, asc, cgu, jtag, exin, stp, gpt, nmi, pci, ebu, mdio + + + +Definition of pin configurations: + +Required subnode-properties: +- lantiq,pins : An array of strings. Each string contains the name of a pin. + Valid values for these names are listed below. + +Optional subnode-properties: +- lantiq,pull: Integer, representing the pull-down/up to apply to the pin. + 0: none, 1: down, 2: up. +- lantiq,open-drain: Boolean, enables open-drain on the defined pin. + +Valid values for XWAY pin names: + Pinconf pins can be referenced via the names io0-io31. + +Valid values for XR9 pin names: + Pinconf pins can be referenced via the names io0-io55. + +Example: + gpio: pinmux@E100B10 { + compatible = "lantiq,pinctrl-xway"; + pinctrl-names = "default"; + pinctrl-0 = <&state_default>; + + #gpio-cells = <2>; + gpio-controller; + reg = <0xE100B10 0xA0>; + + state_default: pinmux { + stp { + lantiq,groups = "stp"; + lantiq,function = "stp"; + }; + pci { + lantiq,groups = "gnt1"; + lantiq,function = "pci"; + }; + conf_out { + lantiq,pins = "io4", "io5", "io6"; /* stp */ + lantiq,open-drain; + lantiq,pull = <0>; + }; + }; + }; + diff --git a/Documentation/devicetree/bindings/pwm/imx-pwm.txt b/Documentation/devicetree/bindings/pwm/imx-pwm.txt new file mode 100644 index 000000000000..8522bfbccfd7 --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/imx-pwm.txt @@ -0,0 +1,17 @@ +Freescale i.MX PWM controller + +Required properties: +- compatible: should be "fsl,<soc>-pwm" +- reg: physical base address and length of the controller's registers +- #pwm-cells: should be 2. The first cell specifies the per-chip index + of the PWM to use and the second cell is the period in nanoseconds. +- interrupts: The interrupt for the pwm controller + +Example: + +pwm1: pwm@53fb4000 { + #pwm-cells = <2>; + compatible = "fsl,imx53-pwm", "fsl,imx27-pwm"; + reg = <0x53fb4000 0x4000>; + interrupts = <61>; +}; diff --git a/Documentation/devicetree/bindings/pwm/mxs-pwm.txt b/Documentation/devicetree/bindings/pwm/mxs-pwm.txt index 11963e4d6bc4..9e3f8f1d46a2 100644 --- a/Documentation/devicetree/bindings/pwm/mxs-pwm.txt +++ b/Documentation/devicetree/bindings/pwm/mxs-pwm.txt @@ -4,7 +4,7 @@ Required properties: - compatible: should be "fsl,imx23-pwm" - reg: physical base address and length of the controller's registers - #pwm-cells: should be 2. The first cell specifies the per-chip index - of the PWM to use and the second cell is the duty cycle in nanoseconds. + of the PWM to use and the second cell is the period in nanoseconds. - fsl,pwm-number: the number of PWM devices Example: diff --git a/Documentation/devicetree/bindings/pwm/nvidia,tegra20-pwm.txt b/Documentation/devicetree/bindings/pwm/nvidia,tegra20-pwm.txt index bbbeedb4ec05..01438ecd6628 100644 --- a/Documentation/devicetree/bindings/pwm/nvidia,tegra20-pwm.txt +++ b/Documentation/devicetree/bindings/pwm/nvidia,tegra20-pwm.txt @@ -7,7 +7,7 @@ Required properties: - reg: physical base address and length of the controller's registers - #pwm-cells: On Tegra the number of cells used to specify a PWM is 2. The first cell specifies the per-chip index of the PWM to use and the second - cell is the duty cycle in nanoseconds. + cell is the period in nanoseconds. Example: diff --git a/Documentation/devicetree/bindings/spi/spi-octeon.txt b/Documentation/devicetree/bindings/spi/spi-octeon.txt new file mode 100644 index 000000000000..431add192342 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-octeon.txt @@ -0,0 +1,33 @@ +Cavium, Inc. OCTEON SOC SPI master controller. + +Required properties: +- compatible : "cavium,octeon-3010-spi" +- reg : The register base for the controller. +- interrupts : One interrupt, used by the controller. +- #address-cells : <1>, as required by generic SPI binding. +- #size-cells : <0>, also as required by generic SPI binding. + +Child nodes as per the generic SPI binding. + +Example: + + spi@1070000001000 { + compatible = "cavium,octeon-3010-spi"; + reg = <0x10700 0x00001000 0x0 0x100>; + interrupts = <0 58>; + #address-cells = <1>; + #size-cells = <0>; + + eeprom@0 { + compatible = "st,m95256", "atmel,at25"; + reg = <0>; + spi-max-frequency = <5000000>; + spi-cpha; + spi-cpol; + + pagesize = <64>; + size = <32768>; + address-width = <16>; + }; + }; + diff --git a/Documentation/devicetree/bindings/timer/brcm,bcm2835-system-timer.txt b/Documentation/devicetree/bindings/timer/brcm,bcm2835-system-timer.txt index 2de21c2acf55..844bd5fbd04c 100644 --- a/Documentation/devicetree/bindings/timer/brcm,bcm2835-system-timer.txt +++ b/Documentation/devicetree/bindings/timer/brcm,bcm2835-system-timer.txt @@ -7,7 +7,7 @@ free running counter values, and generates an interrupt. Required properties: -- compatible : should be "brcm,bcm2835-system-timer.txt" +- compatible : should be "brcm,bcm2835-system-timer" - reg : Specifies base physical address and size of the registers. - interrupts : A list of 4 interrupt sinks; one per timer channel. - clock-frequency : The frequency of the clock that drives the counter, in Hz. diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index 950856bd2e39..43cff70465ab 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -284,3 +284,7 @@ CLOCK PINCTRL devm_pinctrl_get() devm_pinctrl_put() + +PWM + devm_pwm_get() + devm_pwm_put() diff --git a/Documentation/filesystems/nfs/nfs.txt b/Documentation/filesystems/nfs/nfs.txt index f50f26ce6cd0..f2571c8bef74 100644 --- a/Documentation/filesystems/nfs/nfs.txt +++ b/Documentation/filesystems/nfs/nfs.txt @@ -12,9 +12,47 @@ and work is in progress on adding support for minor version 1 of the NFSv4 protocol. The purpose of this document is to provide information on some of the -upcall interfaces that are used in order to provide the NFS client with -some of the information that it requires in order to fully comply with -the NFS spec. +special features of the NFS client that can be configured by system +administrators. + + +The nfs4_unique_id parameter +============================ + +NFSv4 requires clients to identify themselves to servers with a unique +string. File open and lock state shared between one client and one server +is associated with this identity. To support robust NFSv4 state recovery +and transparent state migration, this identity string must not change +across client reboots. + +Without any other intervention, the Linux client uses a string that contains +the local system's node name. System administrators, however, often do not +take care to ensure that node names are fully qualified and do not change +over the lifetime of a client system. Node names can have other +administrative requirements that require particular behavior that does not +work well as part of an nfs_client_id4 string. + +The nfs.nfs4_unique_id boot parameter specifies a unique string that can be +used instead of a system's node name when an NFS client identifies itself to +a server. Thus, if the system's node name is not unique, or it changes, its +nfs.nfs4_unique_id stays the same, preventing collision with other clients +or loss of state during NFS reboot recovery or transparent state migration. + +The nfs.nfs4_unique_id string is typically a UUID, though it can contain +anything that is believed to be unique across all NFS clients. An +nfs4_unique_id string should be chosen when a client system is installed, +just as a system's root file system gets a fresh UUID in its label at +install time. + +The string should remain fixed for the lifetime of the client. It can be +changed safely if care is taken that the client shuts down cleanly and all +outstanding NFSv4 state has expired, to prevent loss of NFSv4 state. + +This string can be stored in an NFS client's grub.conf, or it can be provided +via a net boot facility such as PXE. It may also be specified as an nfs.ko +module parameter. Specifying a uniquifier string is not support for NFS +clients running in containers. + The DNS resolver ================ diff --git a/Documentation/filesystems/nfs/nfsd-admin-interfaces.txt b/Documentation/filesystems/nfs/nfsd-admin-interfaces.txt new file mode 100644 index 000000000000..56a96fb08a73 --- /dev/null +++ b/Documentation/filesystems/nfs/nfsd-admin-interfaces.txt @@ -0,0 +1,41 @@ +Administrative interfaces for nfsd +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Note that normally these interfaces are used only by the utilities in +nfs-utils. + +nfsd is controlled mainly by pseudofiles under the "nfsd" filesystem, +which is normally mounted at /proc/fs/nfsd/. + +The server is always started by the first write of a nonzero value to +nfsd/threads. + +Before doing that, NFSD can be told which sockets to listen on by +writing to nfsd/portlist; that write may be: + + - an ascii-encoded file descriptor, which should refer to a + bound (and listening, for tcp) socket, or + - "transportname port", where transportname is currently either + "udp", "tcp", or "rdma". + +If nfsd is started without doing any of these, then it will create one +udp and one tcp listener at port 2049 (see nfsd_init_socks). + +On startup, nfsd and lockd grace periods start. + +nfsd is shut down by a write of 0 to nfsd/threads. All locks and state +are thrown away at that point. + +Between startup and shutdown, the number of threads may be adjusted up +or down by additional writes to nfsd/threads or by writes to +nfsd/pool_threads. + +For more detail about files under nfsd/ and what they control, see +fs/nfsd/nfsctl.c; most of them have detailed comments. + +Implementation notes +^^^^^^^^^^^^^^^^^^^^ + +Note that the rpc server requires the caller to serialize addition and +removal of listening sockets, and startup and shutdown of the server. +For nfsd this is done using nfsd_mutex. diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index fb0a6aeb936c..a1793d670cd0 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -33,7 +33,7 @@ Table of Contents 2 Modifying System Parameters 3 Per-Process Parameters - 3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj - Adjust the oom-killer + 3.1 /proc/<pid>/oom_score_adj - Adjust the oom-killer score 3.2 /proc/<pid>/oom_score - Display current oom-killer score 3.3 /proc/<pid>/io - Display the IO accounting fields @@ -1320,10 +1320,10 @@ of the kernel. CHAPTER 3: PER-PROCESS PARAMETERS ------------------------------------------------------------------------------ -3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj- Adjust the oom-killer score +3.1 /proc/<pid>/oom_score_adj- Adjust the oom-killer score -------------------------------------------------------------------------------- -These file can be used to adjust the badness heuristic used to select which +This file can be used to adjust the badness heuristic used to select which process gets killed in out of memory conditions. The badness heuristic assigns a value to each candidate task ranging from 0 @@ -1361,22 +1361,10 @@ same system, cpuset, mempolicy, or memory controller resources to use at least equivalent to discounting 50% of the task's allowed memory from being considered as scoring against the task. -For backwards compatibility with previous kernels, /proc/<pid>/oom_adj may also -be used to tune the badness score. Its acceptable values range from -16 -(OOM_ADJUST_MIN) to +15 (OOM_ADJUST_MAX) and a special value of -17 -(OOM_DISABLE) to disable oom killing entirely for that task. Its value is -scaled linearly with /proc/<pid>/oom_score_adj. - -Writing to /proc/<pid>/oom_score_adj or /proc/<pid>/oom_adj will change the -other with its scaled value. - The value of /proc/<pid>/oom_score_adj may be reduced no lower than the last value set by a CAP_SYS_RESOURCE process. To reduce the value any lower requires CAP_SYS_RESOURCE. -NOTICE: /proc/<pid>/oom_adj is deprecated and will be removed, please see -Documentation/feature-removal-schedule.txt. - Caveat: when a parent task is selected, the oom killer will sacrifice any first generation children with separate address spaces instead, if possible. This avoids servers and important system daemons from being killed and loses the @@ -1387,9 +1375,7 @@ minimal amount of work. ------------------------------------------------------------- This file can be used to check the current score used by the oom-killer is for -any given <pid>. Use it together with /proc/<pid>/oom_adj to tune which -process should be killed in an out-of-memory situation. - +any given <pid>. 3.3 /proc/<pid>/io - Display the IO accounting fields ------------------------------------------------------- diff --git a/Documentation/hwmon/da9052 b/Documentation/hwmon/da9052 index ef898553638e..5bc51346b689 100644 --- a/Documentation/hwmon/da9052 +++ b/Documentation/hwmon/da9052 @@ -56,6 +56,6 @@ The junction temperature is calculated: The junction temperature attribute is supported by the driver. The battery temperature is calculated: - Degree Celcius = 1 / (t1 + 1/298)- 273 + Degree Celsius = 1 / (t1 + 1/298)- 273 where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255)) Default values of R25, B, ITBAT are 10e3, 3380 and 50e-6 respectively. diff --git a/Documentation/hwmon/max1619 b/Documentation/hwmon/max1619 index d6f8d9cd7d7f..e6d87398cc8f 100644 --- a/Documentation/hwmon/max1619 +++ b/Documentation/hwmon/max1619 @@ -9,7 +9,7 @@ Supported chips: http://pdfserv.maxim-ic.com/en/ds/MAX1619.pdf Authors: - Alexey Fisher <fishor@mail.ru>, + Oleksij Rempel <bug-track@fisher-privat.net>, Jean Delvare <khali@linux-fr.org> Description diff --git a/Documentation/hwmon/twl4030-madc-hwmon b/Documentation/hwmon/twl4030-madc-hwmon index ef7984317cec..c3a3a5be10ad 100644 --- a/Documentation/hwmon/twl4030-madc-hwmon +++ b/Documentation/hwmon/twl4030-madc-hwmon @@ -41,5 +41,5 @@ Channel Signal The Sysfs nodes will represent the voltage in the units of mV, the temperature channel shows the converted temperature in -degree celcius. The Battery charging current channel represents +degree Celsius. The Battery charging current channel represents battery charging current in mA. diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index f777fa96243d..e2ed3360b708 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1730,6 +1730,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. will be autodetected by the client, and it will fall back to using the idmapper. To turn off this behaviour, set the value to '0'. + nfs.nfs4_unique_id= + [NFS4] Specify an additional fixed unique ident- + ification string that NFSv4 clients can insert into + their nfs_client_id4 string. This is typically a + UUID that is generated at system install time. nfs.send_implementation_id = [NFSv4.1] Send client implementation identification diff --git a/Documentation/leds/leds-lp5523.txt b/Documentation/leds/leds-lp5523.txt index fad2feb8b7ce..c2743f59f9ac 100644 --- a/Documentation/leds/leds-lp5523.txt +++ b/Documentation/leds/leds-lp5523.txt @@ -10,8 +10,22 @@ Contact: Samu Onkalo (samu.p.onkalo-at-nokia.com) Description ----------- LP5523 can drive up to 9 channels. Leds can be controlled directly via -the led class control interface. Channels have generic names: -lp5523:channelx where x is 0...8 +the led class control interface. +The name of each channel is configurable in the platform data - name and label. +There are three options to make the channel name. + +a) Define the 'name' in the platform data +To make specific channel name, then use 'name' platform data. +/sys/class/leds/R1 (name: 'R1') +/sys/class/leds/B1 (name: 'B1') + +b) Use the 'label' with no 'name' field +For one device name with channel number, then use 'label'. +/sys/class/leds/RGB:channelN (label: 'RGB', N: 0 ~ 8) + +c) Default +If both fields are NULL, 'lp5523' is used by default. +/sys/class/leds/lp5523:channelN (N: 0 ~ 8) The chip provides 3 engines. Each engine can control channels without interaction from the main CPU. Details of the micro engine code can be found @@ -46,12 +60,13 @@ Note - chan_nr can have values between 0 and 8. static struct lp5523_led_config lp5523_led_config[] = { { + .name = "D1", .chan_nr = 0, .led_current = 50, .max_current = 130, }, ... - }, { + { .chan_nr = 8, .led_current = 50, .max_current = 130, diff --git a/Documentation/memory.txt b/Documentation/memory.txt deleted file mode 100644 index 802efe58647c..000000000000 --- a/Documentation/memory.txt +++ /dev/null @@ -1,33 +0,0 @@ -There are several classic problems related to memory on Linux -systems. - - 1) There are some motherboards that will not cache above - a certain quantity of memory. If you have one of these - motherboards, your system will be SLOWER, not faster - as you add more memory. Consider exchanging your - motherboard. - -All of these problems can be addressed with the "mem=XXXM" boot option -(where XXX is the size of RAM to use in megabytes). -It can also tell Linux to use less memory than is actually installed. -If you use "mem=" on a machine with PCI, consider using "memmap=" to avoid -physical address space collisions. - -See the documentation of your boot loader (LILO, grub, loadlin, etc.) about -how to pass options to the kernel. - -There are other memory problems which Linux cannot deal with. Random -corruption of memory is usually a sign of serious hardware trouble. -Try: - - * Reducing memory settings in the BIOS to the most conservative - timings. - - * Adding a cooling fan. - - * Not overclocking your CPU. - - * Having the memory tested in a memory tester or exchanged - with the vendor. Consider testing it with memtest86 yourself. - - * Exchanging your CPU, cache, or motherboard for one that works. diff --git a/Documentation/percpu-rw-semaphore.txt b/Documentation/percpu-rw-semaphore.txt new file mode 100644 index 000000000000..7d3c82431909 --- /dev/null +++ b/Documentation/percpu-rw-semaphore.txt @@ -0,0 +1,27 @@ +Percpu rw semaphores +-------------------- + +Percpu rw semaphores is a new read-write semaphore design that is +optimized for locking for reading. + +The problem with traditional read-write semaphores is that when multiple +cores take the lock for reading, the cache line containing the semaphore +is bouncing between L1 caches of the cores, causing performance +degradation. + +Locking for reading is very fast, it uses RCU and it avoids any atomic +instruction in the lock and unlock path. On the other hand, locking for +writing is very expensive, it calls synchronize_rcu() that can take +hundreds of milliseconds. + +The lock is declared with "struct percpu_rw_semaphore" type. +The lock is initialized percpu_init_rwsem, it returns 0 on success and +-ENOMEM on allocation failure. +The lock must be freed with percpu_free_rwsem to avoid memory leak. + +The lock is locked for read with percpu_down_read, percpu_up_read and +for write with percpu_down_write, percpu_up_write. + +The idea of using RCU for optimized rw-lock was introduced by +Eric Dumazet <eric.dumazet@gmail.com>. +The code was written by Mikulas Patocka <mpatocka@redhat.com> diff --git a/Documentation/prio_tree.txt b/Documentation/prio_tree.txt deleted file mode 100644 index 3aa68f9a117b..000000000000 --- a/Documentation/prio_tree.txt +++ /dev/null @@ -1,107 +0,0 @@ -The prio_tree.c code indexes vmas using 3 different indexes: - * heap_index = vm_pgoff + vm_size_in_pages : end_vm_pgoff - * radix_index = vm_pgoff : start_vm_pgoff - * size_index = vm_size_in_pages - -A regular radix-priority-search-tree indexes vmas using only heap_index and -radix_index. The conditions for indexing are: - * ->heap_index >= ->left->heap_index && - ->heap_index >= ->right->heap_index - * if (->heap_index == ->left->heap_index) - then ->radix_index < ->left->radix_index; - * if (->heap_index == ->right->heap_index) - then ->radix_index < ->right->radix_index; - * nodes are hashed to left or right subtree using radix_index - similar to a pure binary radix tree. - -A regular radix-priority-search-tree helps to store and query -intervals (vmas). However, a regular radix-priority-search-tree is only -suitable for storing vmas with different radix indices (vm_pgoff). - -Therefore, the prio_tree.c extends the regular radix-priority-search-tree -to handle many vmas with the same vm_pgoff. Such vmas are handled in -2 different ways: 1) All vmas with the same radix _and_ heap indices are -linked using vm_set.list, 2) if there are many vmas with the same radix -index, but different heap indices and if the regular radix-priority-search -tree cannot index them all, we build an overflow-sub-tree that indexes such -vmas using heap and size indices instead of heap and radix indices. For -example, in the figure below some vmas with vm_pgoff = 0 (zero) are -indexed by regular radix-priority-search-tree whereas others are pushed -into an overflow-subtree. Note that all vmas in an overflow-sub-tree have -the same vm_pgoff (radix_index) and if necessary we build different -overflow-sub-trees to handle each possible radix_index. For example, -in figure we have 3 overflow-sub-trees corresponding to radix indices -0, 2, and 4. - -In the final tree the first few (prio_tree_root->index_bits) levels -are indexed using heap and radix indices whereas the overflow-sub-trees below -those levels (i.e. levels prio_tree_root->index_bits + 1 and higher) are -indexed using heap and size indices. In overflow-sub-trees the size_index -is used for hashing the nodes to appropriate places. - -Now, an example prio_tree: - - vmas are represented [radix_index, size_index, heap_index] - i.e., [start_vm_pgoff, vm_size_in_pages, end_vm_pgoff] - -level prio_tree_root->index_bits = 3 ------ - _ - 0 [0,7,7] | - / \ | - ------------------ ------------ | Regular - / \ | radix priority - 1 [1,6,7] [4,3,7] | search tree - / \ / \ | - ------- ----- ------ ----- | heap-and-radix - / \ / \ | indexed - 2 [0,6,6] [2,5,7] [5,2,7] [6,1,7] | - / \ / \ / \ / \ | - 3 [0,5,5] [1,5,6] [2,4,6] [3,4,7] [4,2,6] [5,1,6] [6,0,6] [7,0,7] | - / / / _ - / / / _ - 4 [0,4,4] [2,3,5] [4,1,5] | - / / / | - 5 [0,3,3] [2,2,4] [4,0,4] | Overflow-sub-trees - / / | - 6 [0,2,2] [2,1,3] | heap-and-size - / / | indexed - 7 [0,1,1] [2,0,2] | - / | - 8 [0,0,0] | - _ - -Note that we use prio_tree_root->index_bits to optimize the height -of the heap-and-radix indexed tree. Since prio_tree_root->index_bits is -set according to the maximum end_vm_pgoff mapped, we are sure that all -bits (in vm_pgoff) above prio_tree_root->index_bits are 0 (zero). Therefore, -we only use the first prio_tree_root->index_bits as radix_index. -Whenever index_bits is increased in prio_tree_expand, we shuffle the tree -to make sure that the first prio_tree_root->index_bits levels of the tree -is indexed properly using heap and radix indices. - -We do not optimize the height of overflow-sub-trees using index_bits. -The reason is: there can be many such overflow-sub-trees and all of -them have to be suffled whenever the index_bits increases. This may involve -walking the whole prio_tree in prio_tree_insert->prio_tree_expand code -path which is not desirable. Hence, we do not optimize the height of the -heap-and-size indexed overflow-sub-trees using prio_tree->index_bits. -Instead the overflow sub-trees are indexed using full BITS_PER_LONG bits -of size_index. This may lead to skewed sub-trees because most of the -higher significant bits of the size_index are likely to be 0 (zero). In -the example above, all 3 overflow-sub-trees are skewed. This may marginally -affect the performance. However, processes rarely map many vmas with the -same start_vm_pgoff but different end_vm_pgoffs. Therefore, we normally -do not require overflow-sub-trees to index all vmas. - -From the above discussion it is clear that the maximum height of -a prio_tree can be prio_tree_root->index_bits + BITS_PER_LONG. -However, in most of the common cases we do not need overflow-sub-trees, -so the tree height in the common cases will be prio_tree_root->index_bits. - -It is fair to mention here that the prio_tree_root->index_bits -is increased on demand, however, the index_bits is not decreased when -vmas are removed from the prio_tree. That's tricky to do. Hence, it's -left as a home work problem. - - diff --git a/Documentation/pwm.txt b/Documentation/pwm.txt index 554290ebab94..7d2b4c9b544b 100644 --- a/Documentation/pwm.txt +++ b/Documentation/pwm.txt @@ -36,7 +36,8 @@ Legacy users can request a PWM device using pwm_request() and free it after usage with pwm_free(). New users should use the pwm_get() function and pass to it the consumer -device or a consumer name. pwm_put() is used to free the PWM device. +device or a consumer name. pwm_put() is used to free the PWM device. Managed +variants of these functions, devm_pwm_get() and devm_pwm_put(), also exist. After being requested a PWM has to be configured using: diff --git a/Documentation/rbtree.txt b/Documentation/rbtree.txt index 8d32d85a5234..61b6c48871a0 100644 --- a/Documentation/rbtree.txt +++ b/Documentation/rbtree.txt @@ -193,24 +193,55 @@ Example: Support for Augmented rbtrees ----------------------------- -Augmented rbtree is an rbtree with "some" additional data stored in each node. -This data can be used to augment some new functionality to rbtree. -Augmented rbtree is an optional feature built on top of basic rbtree -infrastructure. An rbtree user who wants this feature will have to call the -augmentation functions with the user provided augmentation callback -when inserting and erasing nodes. - -On insertion, the user must call rb_augment_insert() once the new node is in -place. This will cause the augmentation function callback to be called for -each node between the new node and the root which has been affected by the -insertion. - -When erasing a node, the user must call rb_augment_erase_begin() first to -retrieve the deepest node on the rebalance path. Then, after erasing the -original node, the user must call rb_augment_erase_end() with the deepest -node found earlier. This will cause the augmentation function to be called -for each affected node between the deepest node and the root. - +Augmented rbtree is an rbtree with "some" additional data stored in +each node, where the additional data for node N must be a function of +the contents of all nodes in the subtree rooted at N. This data can +be used to augment some new functionality to rbtree. Augmented rbtree +is an optional feature built on top of basic rbtree infrastructure. +An rbtree user who wants this feature will have to call the augmentation +functions with the user provided augmentation callback when inserting +and erasing nodes. + +C files implementing augmented rbtree manipulation must include +<linux/rbtree_augmented.h> instead of <linus/rbtree.h>. Note that +linux/rbtree_augmented.h exposes some rbtree implementations details +you are not expected to rely on; please stick to the documented APIs +there and do not include <linux/rbtree_augmented.h> from header files +either so as to minimize chances of your users accidentally relying on +such implementation details. + +On insertion, the user must update the augmented information on the path +leading to the inserted node, then call rb_link_node() as usual and +rb_augment_inserted() instead of the usual rb_insert_color() call. +If rb_augment_inserted() rebalances the rbtree, it will callback into +a user provided function to update the augmented information on the +affected subtrees. + +When erasing a node, the user must call rb_erase_augmented() instead of +rb_erase(). rb_erase_augmented() calls back into user provided functions +to updated the augmented information on affected subtrees. + +In both cases, the callbacks are provided through struct rb_augment_callbacks. +3 callbacks must be defined: + +- A propagation callback, which updates the augmented value for a given + node and its ancestors, up to a given stop point (or NULL to update + all the way to the root). + +- A copy callback, which copies the augmented value for a given subtree + to a newly assigned subtree root. + +- A tree rotation callback, which copies the augmented value for a given + subtree to a newly assigned subtree root AND recomputes the augmented + information for the former subtree root. + +The compiled code for rb_erase_augmented() may inline the propagation and +copy callbacks, which results in a large function, so each augmented rbtree +user should have a single rb_erase_augmented() call site in order to limit +compiled code size. + + +Sample usage: Interval tree is an example of augmented rb tree. Reference - "Introduction to Algorithms" by Cormen, Leiserson, Rivest and Stein. @@ -230,26 +261,132 @@ and its immediate children. And this will be used in O(log n) lookup for lowest match (lowest start address among all possible matches) with something like: -find_lowest_match(lo, hi, node) +struct interval_tree_node * +interval_tree_first_match(struct rb_root *root, + unsigned long start, unsigned long last) { - lowest_match = NULL; - while (node) { - if (max_hi(node->left) > lo) { - // Lowest overlap if any must be on left side - node = node->left; - } else if (overlap(lo, hi, node)) { - lowest_match = node; - break; - } else if (lo > node->lo) { - // Lowest overlap if any must be on right side - node = node->right; - } else { - break; + struct interval_tree_node *node; + + if (!root->rb_node) + return NULL; + node = rb_entry(root->rb_node, struct interval_tree_node, rb); + + while (true) { + if (node->rb.rb_left) { + struct interval_tree_node *left = + rb_entry(node->rb.rb_left, + struct interval_tree_node, rb); + if (left->__subtree_last >= start) { + /* + * Some nodes in left subtree satisfy Cond2. + * Iterate to find the leftmost such node N. + * If it also satisfies Cond1, that's the match + * we are looking for. Otherwise, there is no + * matching interval as nodes to the right of N + * can't satisfy Cond1 either. + */ + node = left; + continue; + } } + if (node->start <= last) { /* Cond1 */ + if (node->last >= start) /* Cond2 */ + return node; /* node is leftmost match */ + if (node->rb.rb_right) { + node = rb_entry(node->rb.rb_right, + struct interval_tree_node, rb); + if (node->__subtree_last >= start) + continue; + } + } + return NULL; /* No match */ + } +} + +Insertion/removal are defined using the following augmented callbacks: + +static inline unsigned long +compute_subtree_last(struct interval_tree_node *node) +{ + unsigned long max = node->last, subtree_last; + if (node->rb.rb_left) { + subtree_last = rb_entry(node->rb.rb_left, + struct interval_tree_node, rb)->__subtree_last; + if (max < subtree_last) + max = subtree_last; + } + if (node->rb.rb_right) { + subtree_last = rb_entry(node->rb.rb_right, + struct interval_tree_node, rb)->__subtree_last; + if (max < subtree_last) + max = subtree_last; + } + return max; +} + +static void augment_propagate(struct rb_node *rb, struct rb_node *stop) +{ + while (rb != stop) { + struct interval_tree_node *node = + rb_entry(rb, struct interval_tree_node, rb); + unsigned long subtree_last = compute_subtree_last(node); + if (node->__subtree_last == subtree_last) + break; + node->__subtree_last = subtree_last; + rb = rb_parent(&node->rb); } - return lowest_match; } -Finding exact match will be to first find lowest match and then to follow -successor nodes looking for exact match, until the start of a node is beyond -the hi value we are looking for. +static void augment_copy(struct rb_node *rb_old, struct rb_node *rb_new) +{ + struct interval_tree_node *old = + rb_entry(rb_old, struct interval_tree_node, rb); + struct interval_tree_node *new = + rb_entry(rb_new, struct interval_tree_node, rb); + + new->__subtree_last = old->__subtree_last; +} + +static void augment_rotate(struct rb_node *rb_old, struct rb_node *rb_new) +{ + struct interval_tree_node *old = + rb_entry(rb_old, struct interval_tree_node, rb); + struct interval_tree_node *new = + rb_entry(rb_new, struct interval_tree_node, rb); + + new->__subtree_last = old->__subtree_last; + old->__subtree_last = compute_subtree_last(old); +} + +static const struct rb_augment_callbacks augment_callbacks = { + augment_propagate, augment_copy, augment_rotate +}; + +void interval_tree_insert(struct interval_tree_node *node, + struct rb_root *root) +{ + struct rb_node **link = &root->rb_node, *rb_parent = NULL; + unsigned long start = node->start, last = node->last; + struct interval_tree_node *parent; + + while (*link) { + rb_parent = *link; + parent = rb_entry(rb_parent, struct interval_tree_node, rb); + if (parent->__subtree_last < last) + parent->__subtree_last = last; + if (start < parent->start) + link = &parent->rb.rb_left; + else + link = &parent->rb.rb_right; + } + + node->__subtree_last = last; + rb_link_node(&node->rb, rb_parent, link); + rb_insert_augmented(&node->rb, root, &augment_callbacks); +} + +void interval_tree_remove(struct interval_tree_node *node, + struct rb_root *root) +{ + rb_erase_augmented(&node->rb, root, &augment_callbacks); +} diff --git a/Documentation/scsi/ChangeLog.megaraid_sas b/Documentation/scsi/ChangeLog.megaraid_sas index 3a3079411a3d..da03146c182a 100644 --- a/Documentation/scsi/ChangeLog.megaraid_sas +++ b/Documentation/scsi/ChangeLog.megaraid_sas @@ -1,3 +1,16 @@ +Release Date : Mon. Oct 1, 2012 17:00:00 PST 2012 - + (emaild-id:megaraidlinux@lsi.com) + Adam Radford +Current Version : 06.504.01.00-rc1 +Old Version : 00.00.06.18-rc1 + 1. Removed un-needed completion_lock spinlock calls. + 2. Add module param for configurable MSI-X vector count. + 3. Load io_request DataLength in bytes. + 4. Add array boundary check for SystemPD. + 5. Add SystemPD FastPath support. + 6. Remove duplicate code. + 7. Version, Changelog, Copyright update. +------------------------------------------------------------------------------- Release Date : Tue. Jun 17, 2012 17:00:00 PST 2012 - (emaild-id:megaraidlinux@lsi.com) Adam Radford/Kashyap Desai diff --git a/Documentation/target/tcm_mod_builder.py b/Documentation/target/tcm_mod_builder.py index a78879b01f09..3fe0d812dcec 100755 --- a/Documentation/target/tcm_mod_builder.py +++ b/Documentation/target/tcm_mod_builder.py @@ -402,8 +402,6 @@ def tcm_mod_build_configfs(proto_ident, fabric_mod_dir_var, fabric_mod_name): buf += " .queue_data_in = " + fabric_mod_name + "_queue_data_in,\n" buf += " .queue_status = " + fabric_mod_name + "_queue_status,\n" buf += " .queue_tm_rsp = " + fabric_mod_name + "_queue_tm_rsp,\n" - buf += " .get_fabric_sense_len = " + fabric_mod_name + "_get_fabric_sense_len,\n" - buf += " .set_fabric_sense_len = " + fabric_mod_name + "_set_fabric_sense_len,\n" buf += " .is_state_remove = " + fabric_mod_name + "_is_state_remove,\n" buf += " /*\n" buf += " * Setup function pointers for generic logic in target_core_fabric_configfs.c\n" @@ -906,20 +904,6 @@ def tcm_mod_dump_fabric_ops(proto_ident, fabric_mod_dir_var, fabric_mod_name): buf += "}\n\n" bufi += "int " + fabric_mod_name + "_queue_tm_rsp(struct se_cmd *);\n" - if re.search('get_fabric_sense_len\)\(', fo): - buf += "u16 " + fabric_mod_name + "_get_fabric_sense_len(void)\n" - buf += "{\n" - buf += " return 0;\n" - buf += "}\n\n" - bufi += "u16 " + fabric_mod_name + "_get_fabric_sense_len(void);\n" - - if re.search('set_fabric_sense_len\)\(', fo): - buf += "u16 " + fabric_mod_name + "_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)\n" - buf += "{\n" - buf += " return 0;\n" - buf += "}\n\n" - bufi += "u16 " + fabric_mod_name + "_set_fabric_sense_len(struct se_cmd *, u32);\n" - if re.search('is_state_remove\)\(', fo): buf += "int " + fabric_mod_name + "_is_state_remove(struct se_cmd *se_cmd)\n" buf += "{\n" diff --git a/Documentation/video4linux/v4l2-controls.txt b/Documentation/video4linux/v4l2-controls.txt index 54270df99d5c..cfe52c798d74 100644 --- a/Documentation/video4linux/v4l2-controls.txt +++ b/Documentation/video4linux/v4l2-controls.txt @@ -136,11 +136,25 @@ Or alternatively for integer menu controls, by calling v4l2_ctrl_new_int_menu: const struct v4l2_ctrl_ops *ops, u32 id, s32 max, s32 def, const s64 *qmenu_int); +Standard menu controls with a driver specific menu are added by calling +v4l2_ctrl_new_std_menu_items: + + struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items( + struct v4l2_ctrl_handler *hdl, + const struct v4l2_ctrl_ops *ops, u32 id, s32 max, + s32 skip_mask, s32 def, const char * const *qmenu); + These functions are typically called right after the v4l2_ctrl_handler_init: static const s64 exp_bias_qmenu[] = { -2, -1, 0, 1, 2 }; + static const char * const test_pattern[] = { + "Disabled", + "Vertical Bars", + "Solid Black", + "Solid White", + }; v4l2_ctrl_handler_init(&foo->ctrl_handler, nr_of_controls); v4l2_ctrl_new_std(&foo->ctrl_handler, &foo_ctrl_ops, @@ -156,6 +170,9 @@ These functions are typically called right after the v4l2_ctrl_handler_init: ARRAY_SIZE(exp_bias_qmenu) - 1, ARRAY_SIZE(exp_bias_qmenu) / 2 - 1, exp_bias_qmenu); + v4l2_ctrl_new_std_menu_items(&foo->ctrl_handler, &foo_ctrl_ops, + V4L2_CID_TEST_PATTERN, ARRAY_SIZE(test_pattern) - 1, 0, + 0, test_pattern); ... if (foo->ctrl_handler.error) { int err = foo->ctrl_handler.error; @@ -185,6 +202,13 @@ v4l2_ctrl_new_std_menu in that it doesn't have the mask argument and takes as the last argument an array of signed 64-bit integers that form an exact menu item list. +The v4l2_ctrl_new_std_menu_items function is very similar to +v4l2_ctrl_new_std_menu but takes an extra parameter qmenu, which is the driver +specific menu for an otherwise standard menu control. A good example for this +control is the test pattern control for capture/display/sensors devices that +have the capability to generate test patterns. These test patterns are hardware +specific, so the contents of the menu will vary from device to device. + Note that if something fails, the function will return NULL or an error and set ctrl_handler->error to the error code. If ctrl_handler->error was already set, then it will just return and do nothing. This is also true for diff --git a/Documentation/virtual/uml/UserModeLinux-HOWTO.txt b/Documentation/virtual/uml/UserModeLinux-HOWTO.txt index 77dfecf4e2d6..a5f8436753e7 100644 --- a/Documentation/virtual/uml/UserModeLinux-HOWTO.txt +++ b/Documentation/virtual/uml/UserModeLinux-HOWTO.txt @@ -3591,7 +3591,7 @@ Looking at the source shows that the fault happened during a call to - copy_to_user to copy the data into the kernel: + copy_from_user to copy the data into the kernel: 107 count -= chars; diff --git a/Documentation/vm/unevictable-lru.txt b/Documentation/vm/unevictable-lru.txt index fa206cccf89f..a68db7692ee8 100644 --- a/Documentation/vm/unevictable-lru.txt +++ b/Documentation/vm/unevictable-lru.txt @@ -197,12 +197,8 @@ the pages are also "rescued" from the unevictable list in the process of freeing them. page_evictable() also checks for mlocked pages by testing an additional page -flag, PG_mlocked (as wrapped by PageMlocked()). If the page is NOT mlocked, -and a non-NULL VMA is supplied, page_evictable() will check whether the VMA is -VM_LOCKED via is_mlocked_vma(). is_mlocked_vma() will SetPageMlocked() and -update the appropriate statistics if the vma is VM_LOCKED. This method allows -efficient "culling" of pages in the fault path that are being faulted in to -VM_LOCKED VMAs. +flag, PG_mlocked (as wrapped by PageMlocked()), which is set when a page is +faulted into a VM_LOCKED vma, or found in a vma being VM_LOCKED. VMSCAN'S HANDLING OF UNEVICTABLE PAGES @@ -371,8 +367,8 @@ mlock_fixup() filters several classes of "special" VMAs: mlock_fixup() will call make_pages_present() in the hugetlbfs VMA range to allocate the huge pages and populate the ptes. -3) VMAs with VM_DONTEXPAND or VM_RESERVED are generally userspace mappings of - kernel pages, such as the VDSO page, relay channel pages, etc. These pages +3) VMAs with VM_DONTEXPAND are generally userspace mappings of kernel pages, + such as the VDSO page, relay channel pages, etc. These pages are inherently unevictable and are not managed on the LRU lists. mlock_fixup() treats these VMAs the same as hugetlbfs VMAs. It calls make_pages_present() to populate the ptes. @@ -651,7 +647,7 @@ PAGE RECLAIM IN shrink_*_list() ------------------------------- shrink_active_list() culls any obviously unevictable pages - i.e. -!page_evictable(page, NULL) - diverting these to the unevictable list. +!page_evictable(page) - diverting these to the unevictable list. However, shrink_active_list() only sees unevictable pages that made it onto the active/inactive lru lists. Note that these pages do not have PageUnevictable set - otherwise they would be on the unevictable list and shrink_active_list |