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/Documentation/devicetree/bindings/usb/
Dgeneric-ohci.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/usb/generic-ohci.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Greg Kroah-Hartman <gregkh@linuxfoundation.org>
15 - items:
16 - enum:
17 - allwinner,sun4i-a10-ohci
18 - allwinner,sun50i-a64-ohci
19 - allwinner,sun50i-h6-ohci
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/Documentation/userspace-api/media/v4l/
Ddev-overlay.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
11 Video overlay devices have the ability to genlock (TV-)video into the
12 (VGA-)video signal of a graphics card, or to store captured images
30 frame rate of the video standard is not guaranteed. Frames may be
62 :ref:`streaming parameter <streaming-par>` ioctls as needed. The
72 frame buffer parameters, namely the address and size of the frame buffer
79 superuser can change the frame buffer address and size. Users are not
85 card. In this case the frame buffer is not modified by the video device,
86 and the frame buffer address and pixel format are not needed by the
93 1. Chroma-keying displays the overlaid image only where pixels in the
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Dpixfmt-reserved.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _pixfmt-reserved:
11 register your own format, send an e-mail to the linux-media mailing list
15 copy to the linux-media mailing list for inclusion in this section. If
17 please make a proposal on the linux-media mailing list.
26 .. _reserved-formats:
28 .. flat-table:: Reserved Image Formats
29 :header-rows: 1
30 :stub-columns: 0
33 * - Identifier
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Ddiff-v4l.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
4 .. _diff-v4l:
23 and below in :ref:`v4l-dev`.
25 The teletext devices (minor range 192-223) have been removed in V4L2 and
26 no longer exist. There is no hardware available anymore for handling
35 .. _v4l-dev:
37 .. flat-table:: V4L Device Types, Names and Numbers
38 :header-rows: 1
39 :stub-columns: 0
41 * - Device Type
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Dhist-v4l2.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
4 .. _hist-v4l2:
21 1998-08-20: First version.
23 1998-08-27: The :c:func:`select()` function was introduced.
25 1998-09-10: New video standard interface.
27 1998-09-18: The ``VIDIOC_NONCAP`` ioctl was replaced by the otherwise
36 1998-09-28: Revamped video standard. Made video controls individually
39 1998-10-02: The ``id`` field was removed from
47 1998-11-08: Many minor changes. Most symbols have been renamed. Some
50 1998-11-12: The read/write direction of some ioctls was misdefined.
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Dpixfmt-yuv-planar.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. planar-yuv:
12 - Semi-planar formats use two planes. The first plane is the luma plane and
16 - Fully planar formats use three planes to store the Y, Cb and Cr components
26 and applications that support the multi-planar API, described in
27 :ref:`planar-apis`. Unless explicitly documented as supporting non-contiguous
31 Semi-Planar YUV Formats
46 For non-contiguous formats, no constraints are enforced by the format on the
57 .. flat-table:: Overview of Semi-Planar YUV Formats
58 :header-rows: 1
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/Documentation/arch/x86/
Dkernel-stacks.rst1 .. SPDX-License-Identifier: GPL-2.0
7 Kernel stacks on x86-64 bit
15 active thread. These thread stacks are THREAD_SIZE (4*PAGE_SIZE) big.
23 specialized stacks contain no useful data. The main CPU stacks are:
37 per CPU interrupt nest counter. This is needed because x86-64 "IST"
48 An IST is selected by a non-zero value in the IST field of an
49 interrupt-gate descriptor. When an interrupt occurs and the hardware
53 will switch back to the per-thread stack. If software wants to allow
63 stack size allocated to an IST assumes no nesting for the same code.
70 Used for interrupt 8 - Double Fault Exception (#DF).
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/Documentation/devicetree/bindings/net/
Dfsl,fman-mdio.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/net/fsl,fman-mdio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Freescale Frame Manager MDIO Device
10 - Frank Li <Frank.Li@nxp.com>
18 - fsl,fman-mdio
19 - fsl,fman-xmdio
20 - fsl,fman-memac-mdio
22 Must include "fsl,fman-mdio" for 1 Gb/s MDIO from FMan v2.
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/Documentation/networking/device_drivers/ethernet/freescale/
Ddpaa.rst1 .. SPDX-License-Identifier: GPL-2.0
8 - Madalin Bucur <madalin.bucur@nxp.com>
9 - Camelia Groza <camelia.groza@nxp.com>
13 - DPAA Ethernet Overview
14 - DPAA Ethernet Supported SoCs
15 - Configuring DPAA Ethernet in your kernel
16 - DPAA Ethernet Frame Processing
17 - DPAA Ethernet Features
18 - DPAA IRQ Affinity and Receive Side Scaling
19 - Debugging
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/Documentation/arch/arm64/
Dsme.rst19 -----------
26 instructions and registers, and the Linux-specific system interfaces
31 the SME2 instructions and ZT0, and the Linux-specific system interfaces
58 cpu-feature-registers.txt for details.
69 vectors from 0 to VL/8-1 stored in the same endianness invariant format as is
76 ------------------
84 3. Sharing of streaming and non-streaming mode SVE state
85 ---------------------------------------------------------
88 between streaming and non-streaming modes. When switching between modes
89 via software interfaces such as ptrace if no register content is provided as
[all …]
Dsve.rst23 -----------
26 tracked per-thread.
34 instructions and registers, and the Linux-specific system interfaces
61 cpu-feature-registers.txt for details.
79 an endianness-invariant layout, with bits [(8 * i + 7) : (8 * i)] encoded at
81 example the signal frame (struct sve_context) and ptrace interface
84 Beware that on big-endian systems this results in a different byte order than
85 for the FPSIMD V-registers, which are stored as single host-endian 128-bit
86 values, with bits [(127 - 8 * i) : (120 - 8 * i)] of the register encoded at
91 -----------------------------
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/Documentation/networking/device_drivers/can/ctu/
Dctucanfd-driver.rst1 .. SPDX-License-Identifier: GPL-2.0-or-later
10 ------------------------
19 `Vivado integration <https://gitlab.fel.cvut.cz/canbus/zynq/zynq-can-sja1000-top>`_
20 and Intel Cyclone V 5CSEMA4U23C6 based DE0-Nano-SoC Terasic board
21 `QSys integration <https://gitlab.fel.cvut.cz/canbus/intel-soc-ctucanfd>`_
23 `PCIe integration <https://gitlab.fel.cvut.cz/canbus/pcie-ctucanfd>`_ of the core.
33 version of emulation support can be cloned from ctu-canfd branch of QEMU local
34 development `repository <https://gitlab.fel.cvut.cz/canbus/qemu-canbus>`_.
38 ---------------
59 it allows for device hot-plug.
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/Documentation/networking/
Dsegmentation-offloads.rst1 .. SPDX-License-Identifier: GPL-2.0
15 * TCP Segmentation Offload - TSO
16 * UDP Fragmentation Offload - UFO
18 * Generic Segmentation Offload - GSO
19 * Generic Receive Offload - GRO
20 * Partial Generic Segmentation Offload - GSO_PARTIAL
21 * SCTP acceleration with GSO - GSO_BY_FRAGS
27 TCP segmentation allows a device to segment a single frame into multiple
28 frames with a data payload size specified in skb_shinfo()->gso_size.
30 SKB_GSO_TCPV6 should be set in skb_shinfo()->gso_type and
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Dip-sysctl.rst1 .. SPDX-License-Identifier: GPL-2.0
10 ip_forward - BOOLEAN
11 - 0 - disabled (default)
12 - not 0 - enabled
20 ip_default_ttl - INTEGER
25 ip_no_pmtu_disc - INTEGER
27 fragmentation-required ICMP is received, the PMTU to this
38 accept fragmentation-needed errors if the underlying protocol
48 Possible values: 0-3
52 min_pmtu - INTEGER
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Dsnmp_counter.rst17 .. _RFC1213 ipInReceives: https://tools.ietf.org/html/rfc1213#page-26
30 .. _RFC1213 ipInDelivers: https://tools.ietf.org/html/rfc1213#page-28
33 ICMP and so on. If no one listens on a raw socket, only kernel
41 .. _RFC1213 ipOutRequests: https://tools.ietf.org/html/rfc1213#page-28
49 They are Linux kernel extensions, no RFC definitions. Please note,
60 .. _Explicit Congestion Notification: https://tools.ietf.org/html/rfc3168#page-6
63 status. They count the real frame number regardless the LRO/GRO. So
73 .. _RFC1213 ipInHdrErrors: https://tools.ietf.org/html/rfc1213#page-27
81 .. _RFC1213 ipInAddrErrors: https://tools.ietf.org/html/rfc1213#page-27
88 not a local address and there is no route for the destination IP
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/Documentation/usb/
Dusbmon.rst15 The usbmon reports requests made by peripheral-specific drivers to Host
35 ----------
41 # mount -t debugfs none_debugs /sys/kernel/debug
56 ------------------------------------------------
58 Run "cat /sys/kernel/debug/usb/devices", and find the T-line which corresponds
61 /sys/kernel/debug/usb/devices outputs. The T-line will have a bus number.
77 --------------
92 -----------------------------------------------
98 -----------
100 Usually it's done with a keyboard interrupt (Control-C).
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Dehci.rst5 27-Dec-2002
8 USB 2.0-capable host controller hardware. The USB 2.0 standard is
11 - "High Speed" 480 Mbit/sec (60 MByte/sec)
12 - "Full Speed" 12 Mbit/sec (1.5 MByte/sec)
13 - "Low Speed" 1.5 Mbit/sec
31 While usb-storage devices have been available since mid-2001 (working
34 appear to be on hold until more systems come with USB 2.0 built-in.
39 other changes to the Linux-USB core APIs, including the hub driver,
43 - David Brownell
51 used on PPC hardware so big/little endianness issues should be gone.
[all …]
/Documentation/staging/
Dcrc32.rst5 A CRC is a long-division remainder. You add the CRC to the message,
11 protocols put the end-of-frame flag after the CRC.
15 - We're working in binary, so the digits are only 0 and 1, and
16 - When dividing polynomials, there are no carries. Rather than add and
21 To produce a 32-bit CRC, the divisor is actually a 33-bit CRC polynomial.
24 familiar with the IEEE 754 floating-point format, it's the same idea.)
28 the best error-detecting properties, this should correspond to the
29 order they're actually sent. For example, standard RS-232 serial is
30 little-endian; the most significant bit (sometimes used for parity)
38 back into range. In binary, this is easy - it has to be either 0 or 1,
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/Documentation/fb/
Dmatroxfb.rst16 * Most important: boot logo :-)
34 box) and matroxfb (for graphics mode). You should not compile-in vesafb
35 unless you have primary display on non-Matrox VBE2.0 device (see
43 -------------
58 -------------------------
73 ----------
86 Non-listed number can be achieved by more complicated command-line, for
93 XF{68,86}_FBDev should work just fine, but it is non-accelerated. On non-intel
97 Running another (accelerated) X-Server like XF86_SVGA works too. But (at least)
98 XFree servers have big troubles in multihead configurations (even on first
[all …]
/Documentation/scheduler/
Dsched-util-clamp.rst1 .. SPDX-License-Identifier: GPL-2.0
44 performance point required by its display pipeline to ensure no frame is
57 foreground, top-app, etc. Util clamp can be used to constrain how much
60 the ones belonging to the currently active app (top-app group). Beside this
62 heterogeneous systems (e.g. Arm big.LITTLE); the constraint will help bias the
65 1. The big cores are free to run top-app tasks immediately. top-app
75 **big cores**:
106 Note that by design RT tasks don't have per-task PELT signal and must always
114 See :ref:`section 3.4 <uclamp-default-values>` for default values and
115 :ref:`3.4.1 <sched-util-clamp-min-rt-default>` on how to change RT tasks
[all …]
/Documentation/filesystems/
Dpath-lookup.rst5 This write-up is based on three articles published at lwn.net:
7 - <https://lwn.net/Articles/649115/> Pathname lookup in Linux
8 - <https://lwn.net/Articles/649729/> RCU-walk: faster pathname lookup in Linux
9 - <https://lwn.net/Articles/650786/> A walk among the symlinks
15 - per-directory parallel name lookup.
16 - ``openat2()`` resolution restriction flags.
27 the early parts of the analysis we will divide off symlinks - leaving
30 will allow us to review "REF-walk" and "RCU-walk" separately. But we
35 --------------------------
37 .. _openat: http://man7.org/linux/man-pages/man2/openat.2.html
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/Documentation/process/
Dbotching-up-ioctls.rst5 From: https://blog.ffwll.ch/2013/11/botching-up-ioctls.html
13 Which is nice, since there's no more insanity in the form of fake-generic, but
19 only cover technicalities and not the big-picture issues like what the command
25 -------------
28 will need to add a 32-bit compat layer:
33 * Align everything to the natural size and use explicit padding. 32-bit
34 platforms don't necessarily align 64-bit values to 64-bit boundaries, but
35 64-bit platforms do. So we always need padding to the natural size to get
38 * Pad the entire struct to a multiple of 64-bits if the structure contains
39 64-bit types - the structure size will otherwise differ on 32-bit versus
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/Documentation/netlink/specs/
Drt_link.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 name: rt-link
4 protocol: netlink-raw
11 -
12 name: ifinfo-flags
15 -
17 -
19 -
21 -
23 -
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/Documentation/translations/it_IT/process/
D4.Coding.rst1 .. include:: ../disclaimer-ita.rst
14 altri sviluppatori ed inserito (o no) nel ramo principale. Quindi è la
23 --------
29 :ref:`Documentation/translations/it_IT/process/coding-style.rst <codingstyle>`.
49 in differenti modi - incluso il controllo sul come formattare il codice.
66 Notate che potete utilizzare lo strumento “clang-format” per aiutarvi con
72 :ref:`Documentation/translations/it_IT/process/clang-format.rst <clangformat>`
97 sottile, in un modo che non è mai stato notato - perché non è mai stato usato.
103 I livelli di astrazione che nascondono l'accesso all'hardware -
104 spesso per poter usare dei driver su diversi sistemi operativi - vengono
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/Documentation/admin-guide/
Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nospcr -- disable console in ACPI SPCR table as
41 If set to vendor, prefer vendor-specific driver
73 Documentation/firmware-guide/acpi/debug.rst for more information about
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