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/kernel/linux/linux-5.10/tools/testing/selftests/rcutorture/doc/
DTREE_RCU-kconfig.txt1 This document gives a brief rationale for the TREE_RCU-related test
7 CONFIG_DEBUG_LOCK_ALLOC -- Do three, covering CONFIG_PROVE_LOCKING & not.
8 CONFIG_DEBUG_OBJECTS_RCU_HEAD -- Do one.
9 CONFIG_HZ_PERIODIC -- Do one.
10 CONFIG_NO_HZ_IDLE -- Do those not otherwise specified. (Groups of two.)
11 CONFIG_NO_HZ_FULL -- Do two, one with partial CPU enablement.
12 CONFIG_PREEMPT -- Do half. (First three and #8.)
13 CONFIG_PROVE_LOCKING -- Do several, covering CONFIG_DEBUG_LOCK_ALLOC=y and not.
14 CONFIG_PROVE_RCU -- Hardwired to CONFIG_PROVE_LOCKING.
15 CONFIG_RCU_BOOST -- one of PREEMPT_RCU.
[all …]
/kernel/linux/linux-5.10/net/netfilter/ipset/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
7 This option adds IP set support to the kernel.
8 In order to define and use the sets, you need the userspace utility
12 To compile it as a module, choose M here. If unsure, say N.
32 This option adds the bitmap:ip set type support, by which one
35 To compile it as a module, choose M here. If unsure, say N.
41 This option adds the bitmap:ip,mac set type support, by which one
44 To compile it as a module, choose M here. If unsure, say N.
50 This option adds the bitmap:port set type support, by which one
53 To compile it as a module, choose M here. If unsure, say N.
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/kernel/linux/linux-5.10/drivers/media/pci/cx18/
Dcx23418.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
11 #include <media/drv-intf/cx2341x.h>
19 IN[0] - Task ID. This is one of the XPU_CMD_MASK_YYY where XPU is
21 OUT[0] - Task handle. This handle is passed along with commands to
22 dispatch to the right instance of the task
23 ReturnCode - One of the ERR_SYS_... */
27 IN[0] - Task handle. Hanlde of the task to destroy
28 ReturnCode - One of the ERR_SYS_... */
48 /* Description: Command APU to start audio
49 IN[0] - audio parameters (same as CX18_CPU_SET_AUDIO_PARAMETERS?)
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/kernel/linux/linux-5.10/Documentation/userspace-api/media/v4l/
Dtuner.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 Video input devices can have one or more tuners demodulating a RF
14 signal. Each tuner is associated with one or more video inputs,
18 set to ``V4L2_INPUT_TYPE_TUNER`` and its ``tuner`` field contains the
21 Radio input devices have exactly one tuner with index zero, no video
24 To query and change tuner properties applications use the
34 current tuner, when there is more than one. The tuner is solely
38 device has one or more tuners.
44 Video output devices can have one or more modulators, that modulate a
45 video signal for radiation or connection to the antenna input of a TV
[all …]
Dpixfmt-compressed.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
8 .. _compressed-formats:
12 .. flat-table:: Compressed Image Formats
13 :header-rows: 1
14 :stub-columns: 0
17 * - Identifier
18 - Code
19 - Details
20 * .. _V4L2-PIX-FMT-JPEG:
22 - ``V4L2_PIX_FMT_JPEG``
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/kernel/linux/linux-5.10/Documentation/devicetree/bindings/pinctrl/
Dsprd,pinctrl.txt6 register contains several bit fields with one bit or several bits
7 to configure for some global common configuration, such as domain
9 driving level": One pin can output 3.0v or 1.8v, depending on the
12 to choose one function (like: UART0) for which system, since we
13 have several systems (AP/CP/CM4) on one SoC.).
16 of them, so we can not make every Spreadtrum-special configuration
17 as one generic configuration, and maybe it will add more strange
18 global configuration in future. Then we add one "sprd,control" to
22 Moreover we recognise every fields comprising one bit or several
23 bits in one global control register as one pin, thus we should
[all …]
/kernel/linux/linux-5.10/include/linux/dma/
Dsprd-dma.h1 /* SPDX-License-Identifier: GPL-2.0 */
15 * The Spreadtrum DMA controller supports channel 2-stage tansfer, that means
16 * we can request 2 dma channels, one for source channel, and another one for
22 * To support 2-stage tansfer, we must configure the channel mode and trigger
27 * enum sprd_dma_chn_mode: define the DMA channel mode for 2-stage transfer
29 * support the 2-stage transfer.
35 * Now the DMA controller can supports 2 groups 2-stage transfer.
46 * enum sprd_dma_trg_mode: define the DMA channel trigger mode for 2-stage
56 * automatically once the source channel's link-list request is done.
71 * @SPRD_DMA_LIST_REQ: link-list request mode
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/kernel/linux/linux-5.10/Documentation/userspace-api/media/mediactl/
Dmedia-types.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _media-controller-types:
5 Types and flags used to represent the media graph elements
10 .. _media-entity-functions:
11 .. _MEDIA-ENT-F-UNKNOWN:
12 .. _MEDIA-ENT-F-V4L2-SUBDEV-UNKNOWN:
13 .. _MEDIA-ENT-F-IO-V4L:
14 .. _MEDIA-ENT-F-IO-VBI:
15 .. _MEDIA-ENT-F-IO-SWRADIO:
16 .. _MEDIA-ENT-F-IO-DTV:
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/kernel/linux/linux-5.10/Documentation/ABI/obsolete/
Dsysfs-driver-hid-roccat-ryos1 What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<p…
4 Description: When written, this file lets one select which data from which
5 profile will be read next. The data has to be 3 bytes long.
9 What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<p…
17 The data has to be 3 bytes long.
21 What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<p…
24 Description: When written, this file lets one set the default of all keys for
26 The data has to be 125 bytes long.
27 Before reading this file, control has to be written to select
28 which profile to read.
[all …]
Dsysfs-driver-hid-roccat-isku1 What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<p…
4 Description: The integer value of this attribute ranges from 0-4.
6 profile. This value is persistent, so its equivalent to the
12 What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<p…
20 What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<p…
23 Description: When written, this file lets one deactivate certain keys like
24 windows and application keys, to prevent accidental presses.
26 written data. The data has to be 6 bytes long.
27 Before reading this file, control has to be written to select
28 which profile to read.
[all …]
/kernel/linux/linux-5.10/include/sound/sof/
Dchannel_map.h1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
16 * \brief Channel map, specifies transformation of one-to-many or many-to-one.
18 * In case of one-to-many specifies how the output channels are computed out of
20 * in case of many-to-one specifies how a single target channel is computed
23 * Channel index specifies position of the channel in the stream on the 'one'
30 * side. Bit[i] set to 1 means that i-th channel is used for computation
34 * one per each channel set in the mask (left to right, LS bit set in the
35 * mask corresponds to ch_coeffs[0]).
49 * More than one transformation per a single channel is allowed (in case
/kernel/linux/linux-5.10/Documentation/filesystems/
Dinotify.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Inotify - A Powerful yet Simple File Change Notification System
13 - Deleted obsoleted interface, just refer to manpages for user interface.
18 What is the design decision behind not tying the watch to the open fd of
29 What is the design decision behind using an-fd-per-instance as opposed to
30 an fd-per-watch?
33 An fd-per-watch quickly consumes more file descriptors than are allowed,
34 more fd's than are feasible to manage, and more fd's than are optimally
35 select()-able. Yes, root can bump the per-process fd limit and yes, users
38 spaces is thus sensible. The current design is what user-space developers
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/kernel/linux/linux-5.10/arch/m68k/include/asm/
Dmac_psc.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * The PSC is used on the AV Macs to control IO functions not handled
9 * The first seven DMA channels appear to be "one-shot" and are actually
10 * sets of two channels; one member is active while the other is being
12 * The one-shot channels are grouped together and are:
23 * to be closely tied and share one set of registers. They also seem to run
25 * not understood as there seems to be only one input and one output buffer
30 * machine with easy-to-find patterns and looking for them in the DMA
34 * 1999-05-25 (jmt)
42 * set only seems to handle four interrupts instead of seven.
[all …]
/kernel/linux/linux-5.10/Documentation/admin-guide/pm/
Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
19 Modern processors are generally able to enter states in which the execution of
20 a program is suspended and instructions belonging to it are not fetched from
24 generally allows power drawn by the processor to be reduced and, in consequence,
25 it is an opportunity to save energy.
27 CPU idle time management is an energy-efficiency feature concerned about using
31 ------------
36 not be separate physical entities and may just be interfaces appearing to
37 software as individual single-core processors. In other words, a CPU is an
38 entity which appears to be fetching instructions that belong to one sequence
[all …]
/kernel/linux/linux-5.10/Documentation/networking/
Daf_xdp.rst1 .. SPDX-License-Identifier: GPL-2.0
18 redirect ingress frames to other XDP enabled netdevs, using the
20 XDP programs to redirect frames to a memory buffer in a user-space
28 to have at least one of these rings for each socket. An RX or TX
29 descriptor ring points to a data buffer in a memory area called a
31 to be copied between RX and TX. Moreover, if a packet needs to be kept
32 for a while due to a possible retransmit, the descriptor that points
33 to that packet can be changed to point to another and reused right
37 one of the rings references a frame by referencing its addr. The addr
43 FILL ring is used by the application to send down addr for the kernel
[all …]
/kernel/liteos_a/kernel/base/include/
Dlos_sys_pri.h2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
16 * to endorse or promote products derived from this software without specific prior written
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
46 * Number of milliseconds in one second.
52 * Number of microseconds in one second.
58 * Number of nanoseconds in one second.
64 * Number of microseconds in one milliseconds.
70 * Number of nanoseconds in one milliseconds.
[all …]
/kernel/linux/linux-5.10/drivers/mtd/spi-nor/
Dsfdp.h1 /* SPDX-License-Identifier: GPL-2.0 */
22 #define BFPT_DWORD(i) ((i) - 1)
57 * - 000b: Device does not have a QE bit. Device detects 1-1-4 and 1-4-4
60 * - 001b: QE is bit 1 of status register 2. It is set via Write Status with
61 * two data bytes where bit 1 of the second byte is one.
63 * Writing only one byte to the status register has the side-effect of
65 * used if writing one byte to the status register does not modify
67 * - 010b: QE is bit 6 of status register 1. It is set via Write Status with
68 * one data byte where bit 6 is one.
70 * - 011b: QE is bit 7 of status register 2. It is set via Write status
[all …]
/kernel/linux/linux-5.10/Documentation/powerpc/
Dpci_iov_resource_on_powernv.rst19 1. Introduction to Partitionable Endpoints
22 A Partitionable Endpoint (PE) is a way to group the various resources
23 associated with a device or a set of devices to provide isolation between
24 partitions (i.e., filtering of DMA, MSIs etc.) and to provide a mechanism
25 to freeze a device that is causing errors in order to limit the possibility
29 state bits (one for MMIO and one for DMA, they get set together but can be
38 are matched to their corresponding PEs.
48 P8 supports up to 256 Partitionable Endpoints per PHB.
57 - For DMA we then provide an entire address space for each PE that can
59 Each window can be configured to be remapped via a "TCE table" (IOMMU
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/kernel/linux/linux-5.10/drivers/accessibility/speakup/
DDefaultKeyAssignments1 This file is intended to give you an overview of the default keys used
2 by speakup for it's review functions. You may change them to be
6 We have remapped the insert or zero key on the keypad to act as a
8 InsKeyPad-period means hold down the insert key like a shift key and
11 KeyPad-8 Say current Line
12 InsKeyPad-8 say from top of screen to reading cursor.
13 KeyPad-7 Say Previous Line (UP one line)
14 KeyPad-9 Say Next Line (down one line)
15 KeyPad-5 Say Current Word
16 InsKeyPad-5 Spell Current Word
[all …]
/kernel/linux/linux-5.10/drivers/staging/fsl-dpaa2/ethsw/
Ddpsw.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright 2014-2016 Freescale Semiconductor Inc.
4 * Copyright 2017-2018 NXP
10 #include "dpsw-cmd.h"
25 * dpsw_open() - Open a control session for the specified object
26 * @mc_io: Pointer to MC portal's I/O object
27 * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
31 * This function can be used to open a control session for an
55 cmd_params->dpsw_id = cpu_to_le32(dpsw_id); in dpsw_open()
57 /* send command to mc*/ in dpsw_open()
[all …]
/kernel/linux/linux-5.10/Documentation/devicetree/bindings/iommu/
Dsamsung,sysmmu.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marek Szyprowski <m.szyprowski@samsung.com>
14 physical memory chunks visible as a contiguous region to DMA-capable peripheral
15 devices like MFC, FIMC, FIMD, GScaler, FIMC-IS and so forth.
17 System MMU is an IOMMU and supports identical translation table format to
20 another capabilities like L2 TLB or block-fetch buffers to minimize translation
23 System MMUs are in many to one relation with peripheral devices, i.e. single
24 peripheral device might have multiple System MMUs (usually one for each bus
[all …]
/kernel/linux/linux-5.10/drivers/usb/dwc3/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
12 If you choose to build this driver is a dynamically linked
21 Select this if you have ULPI type PHY attached to your DWC3
34 Select this when you want to use DWC3 in host mode only,
41 Select this when you want to use DWC3 in gadget mode only,
66 Say 'Y' or 'M' here if you have one such device
73 Recent Exynos5 SoCs ship with one DesignWare Core USB3 IP inside,
74 say 'Y' or 'M' if you have one such device.
77 tristate "PCIe-based Platforms"
85 tristate "Synopsys PCIe-based HAPS Platforms"
[all …]
/kernel/linux/linux-5.10/Documentation/ABI/testing/
Dsysfs-driver-ufs3 Contact: linux-scsi@vger.kernel.org
5 This file contains the auto-hibernate idle timer setting of a
6 UFS host controller. A value of '0' means auto-hibernate is not
11 10-bit values with a power-of-ten multiplier which allows a
12 maximum value of 102300000. Refer to the UFS Host Controller
18 Description: This file shows the device type. This is one of the UFS
27 Description: This file shows the device class. This is one of the UFS
36 Description: This file shows the UFS storage subclass. This is one of
46 This is one of the UFS device descriptor parameters.
55 Description: This file shows number of logical units. This is one of
[all …]
/kernel/linux/linux-5.10/Documentation/driver-api/usb/
Dusb.rst1 .. _usb-hostside-api:
4 The Linux-USB Host Side API
7 Introduction to USB on Linux
10 A Universal Serial Bus (USB) is used to connect a host, such as a PC or
11 workstation, to a number of peripheral devices. USB uses a tree
18 That master/slave asymmetry was designed-in for a number of reasons, one
19 being ease of use. It is not physically possible to mistake upstream and
21 peripheral). Also, the host software doesn't need to deal with
22 distributed auto-configuration since the pre-designated master node
25 Kernel developers added USB support to Linux early in the 2.2 kernel
[all …]
/kernel/linux/linux-5.10/Documentation/sound/soc/
Djack.rst5 ALSA has a standard API for representing physical jacks to user space,
9 - It allows more than one jack detection method to work together on one
11 to be present on a single jack but handled by separate bits of
14 - Integration with DAPM, allowing DAPM endpoints to be updated
20 snd_soc_jack_pins representing DAPM endpoints to update and blocks of
24 mechanisms, one for the headphone and one for the microphone. Some
25 systems won't be able to use their speaker output while a headphone is
26 connected and so will want to make sure to update both speaker and
29 The jack - struct snd_soc_jack
32 This represents a physical jack on the system and is what is visible to
[all …]

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