| /linux/Documentation/networking/ |
| H A D | tcp-thin.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 Thin-streams and TCP
7 A wide range of Internet-based services that use reliable transport
8 protocols display what we call thin-stream properties. This means
9 that the application sends data with such a low rate that the
11 effective. In time-dependent scenarios (like online games, control
15 dependency on the arrival of new data from the application to trigger
19 After analysing a large number of time-dependent interactive
22 lifespan. The combination of time-dependency and the fact that the
25 In order to reduce application-layer latency when packets are lost,
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| H A D | napi.rst | 1 .. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
30 of the NAPI instance while the method is the driver-specific event
37 -----------
55 ------------
64 argument - drivers can process completions for any number of Tx
96 or return ``budget - 1``.
101 -------------
109 As mentioned in the :ref:`drv_ctrl` section - napi_disable() and subsequent
118 --------------------------
121 the NAPI instance - until NAPI polling finishes any further
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| /linux/Documentation/devicetree/bindings/pci/ |
| H A D | snps,dw-pcie-common.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pci/snps,dw-pcie-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jingoo Han <jingoohan1@gmail.com>
11 - Gustavo Pimentel <gustavo.pimentel@synopsys.com>
23 Interface - DBI. In accordance with the reference manual the register
24 configuration space belongs to the Configuration-Dependent Module (CDM)
25 and is split up into several sub-parts Standard PCIe configuration
26 space, Port Logic Registers (PL), Shadow Config-space Registers,
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| H A D | snps,dw-pcie-ep.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/pci/snps,dw-pcie-ep.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jingoo Han <jingoohan1@gmail.com>
11 - Gustavo Pimentel <gustavo.pimentel@synopsys.com>
16 # Please create a separate DT-schema for your DWC PCIe Endpoint controller
17 # and make sure it's assigned with the vendor-specific compatible string.
21 const: snps,dw-pcie-ep
23 - compatible
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| /linux/Documentation/crypto/ |
| H A D | async-tx-api.rst | 1 .. SPDX-License-Identifier: GPL-2.0
24 4.2 "My application needs exclusive control of hardware channels"
32 bulk memory transfers/transforms with support for inter-transactional
43 xor-parity-calculations of the md-raid5 driver using the offload engines
53 2. cross channel dependency chains: the API allows a chain of dependent
54 operations to be submitted, like xor->copy->xor in the raid5 case. The
64 -----------------------------
72 ------------------------
92 -------------------------
94 The return value is non-NULL and points to a 'descriptor' when the operation
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| /linux/Documentation/admin-guide/media/ |
| H A D | ci.rst | 1 .. SPDX-License-Identifier: GPL-2.0
25 A userspace application, like ``ca_zap`` is required to handle encrypted
26 MPEG-TS streams.
28 The ``ca_zap`` userland application is in charge of sending the
31 This application requires the following to function properly as of now.
35 eg: $ szap -c channels.conf -r "TMC" -x
68 The CI module support is largely dependent upon the firmware on the cards
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| /linux/Documentation/userspace-api/media/v4l/ |
| H A D | selection-api-configuration.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
18 parameters and return the actual values selected. An application can
20 :ref:`constraint flags <v4l2-selection-flags>`.
26 See figure :ref:`sel-targets-capture` for examples of the selection
61 adjustments according to hardware limitations. The application can
63 :ref:`constraint flags <v4l2-selection-flags>`.
74 padded area but outside active area is undefined. The application can
123 However, such a padded area is driver-dependent feature not covered by
133 An application can detect if scaling is performed by comparing the width
136 scaling is applied. The application can compute the scaling ratios using
|
| H A D | open.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
22 the hardware, which may also expose device nodes, called V4L2 sub-devices.
24 When such V4L2 sub-devices are exposed, they allow controlling those
25 other hardware components - usually connected via a serial bus (like
26 I²C, SMBus or SPI). Depending on the bridge driver, those sub-devices
29 :ref:`V4L2 sub-devices <subdev>`.
32 :ref:`Media Controller <media_controller>` are called **MC-centric**
34 are called **video-node-centric**.
36 Userspace can check if a V4L2 hardware peripheral is MC-centric by
38 :ref:`device_caps field <device-capabilities>`.
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| H A D | vidioc-g-selection.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_G_SELECTION - VIDIOC_S_SELECTION - Get or set one of the selection rectangles
45 to table :ref:`v4l2-selections-common` or :ref:`selection-api` for
54 expressed in driver-dependent units. The only exception are rectangles
63 :ref:`v4l2-selections-common` or :ref:`selection-api` for additional
68 requested rectangle. An application may introduce constraints to control
72 - ``0`` - The driver can adjust the rectangle size freely and shall
76 - ``V4L2_SEL_FLAG_GE`` - The driver is not allowed to shrink the
79 - ``V4L2_SEL_FLAG_LE`` - The driver is not allowed to enlarge the
82 - ``V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE`` - The driver must choose the
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| /linux/Documentation/driver-api/memory-devices/ |
| H A D | ti-gpmc.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 * Asynchronous SRAM like memories and application specific integrated
14 * Pseudo-SRAM devices
85 4. read async non-muxed
107 6. read sync non-muxed
131 8. write async non-muxed
157 10. write sync non-muxed
172 Many of gpmc timings are dependent on other gpmc timings (a few
173 gpmc timings purely dependent on other gpmc timings, a reason that
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| /linux/Documentation/fb/ |
| H A D | api.rst | 9 ---------------
12 with frame buffer devices. In-kernel APIs between device drivers and the frame
22 ---------------
33 Application should use those capabilities to find out what features they can
36 - FB_CAP_FOURCC
44 --------------------
46 Pixels are stored in memory in hardware-dependent formats. Applications need
58 - FB_TYPE_PACKED_PIXELS
67 - FB_TYPE_PLANES
75 - FB_TYPE_INTERLEAVED_PLANES
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| /linux/Documentation/userspace-api/media/drivers/ |
| H A D | omap3isp-uapi.rst | 1 .. SPDX-License-Identifier: GPL-2.0
17 ------
34 application using the VIDIOC_OMAP3ISP_STAT_REQ IOCTL. The events available
37 - V4L2_EVENT_OMAP3ISP_AEWB
38 - V4L2_EVENT_OMAP3ISP_AF
39 - V4L2_EVENT_OMAP3ISP_HIST
44 omap3isp_stat_event_status.buf_err is set to non-zero.
48 --------------
52 does not fall under the standard IOCTLs --- gamma tables and configuration of
56 containing hardware-dependent functions.
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| /linux/Documentation/userspace-api/media/dvb/ |
| H A D | legacy_dvb_decoder_api.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later OR GPL-2.0
15 the :ref:`legacy_dvb_decoder_formats` used in such digital TV-broadcastsystems.
29 Practically the decoders seem to be treated differently. The application typically
40 Because of that fact the only supported data formats are ISO/IEC 13818-1
44 Timestamps are always MPEG PTS as defined in ITU T-REC-H.222.0 /
45 ISO/IEC 13818-1, if not otherwise noted.
48 Both variants are commonly accepted for playback, but it may be driver dependent.
|
| /linux/Documentation/hid/ |
| H A D | hidraw.rst | 2 HIDRAW - Raw Access to USB and Bluetooth Human Interface Devices
10 Hidraw should be used if the userspace application knows exactly how to
15 Hidraw is also useful for communicating with non-conformant HID devices
19 communication with these non-conformant devices is impossible using hiddev.
21 these non-conformant devices.
31 directly under /dev (eg: /dev/hidraw0). As this location is distribution-
32 and udev rule-dependent, applications should use libudev to locate hidraw
40 ---------------
43 -------
47 a report available to be read. read() can be made non-blocking, by passing
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| /linux/Documentation/usb/ |
| H A D | gadget_uvc.rst | 6 --------
8 connection. It is intended to run on a Linux system that has USB device-side
20 peripheral, but the source of the buffer is entirely dependent on the userspace
24 -----------------------------
29 ---------------------------------------
35 see Documentation/ABI/testing/configfs-usb-gadget-uvc
47 .. code-block:: bash
54 mkdir -p $FUNCTION
99 .. code-block:: bash
112 mkdir -p $wdir
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| /linux/Documentation/networking/device_drivers/ethernet/huawei/ |
| H A D | hinic.rst | 1 .. SPDX-License-Identifier: GPL-2.0
11 The driver supports a range of link-speed devices (10GbE, 25GbE, 40GbE, etc.).
14 Some HiNIC devices support SR-IOV. This driver is used for Physical Function
17 HiNIC devices support MSI-X interrupt vector for each Tx/Rx queue and
21 TCP Transmit Segmentation Offload(TSO), Receive-Side Scaling(RSS) and
28 19e5:1822 - HiNIC PF
34 hinic_dev - Implement a Logical Network device that is independent from
37 hinic_hwdev - Implement the HW details of the device and include the components
55 Asynchronous Event Queues(AEQs) - The event queues for receiving messages from
58 Application Programmable Interface commands(API CMD) - Interface for sending
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| /linux/Documentation/infiniband/ |
| H A D | opa_vnic.rst | 2 Intel Omni-Path (OPA) Virtual Network Interface Controller (VNIC)
5 Intel Omni-Path (OPA) Virtual Network Interface Controller (VNIC) feature
6 supports Ethernet functionality over Omni-Path fabric by encapsulating
11 The patterns of exchanges of Omni-Path encapsulated Ethernet packets
12 involves one or more virtual Ethernet switches overlaid on the Omni-Path
13 fabric topology. A subset of HFI nodes on the Omni-Path fabric are
22 application. HFI nodes can have multiple VNICs each connected to a
26 +-------------------+
30 +-------------------+
35 +-----------------------------+ +------------------------------+
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| /linux/Documentation/iio/ |
| H A D | iio_devbuf.rst | 1 .. SPDX-License-Identifier: GPL-2.0
14 Devices with buffer support feature an additional sub-directory in the
25 ----------
31 ----------
34 be written last, after length and selection of scan elements. Writing a non-zero
39 -------------
49 Non-blocking read will retrieve the available samples from the buffer even if
50 there are less samples than the watermark level. This allows the application to
55 --------------
57 Read-only attribute indicating the bytes of data available in the buffer. In the
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| /linux/drivers/media/rc/keymaps/ |
| H A D | rc-cec.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * instead it is registered directly in rc-main.c if CONFIG_MEDIA_CEC_RC
8 * allowed to use request_module() to load rc-cec.ko in that case.
11 * just compile this keymap into the rc-core module and never as a
17 #include <media/rc-map.h>
21 * CEC Spec "High-Definition Multimedia Interface Specification" can be obtained
36 { 0x09, KEY_ROOT_MENU }, /* CEC Spec: Device Root Menu - see Note 2 */
39 * device-dependent and can be, for example, a contents menu, setup
47 /* 0x0e-0x0f: Reserved */
50 /* 0x12-0x1c: Reserved */
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| /linux/Documentation/devicetree/bindings/mailbox/ |
| H A D | hisilicon,hi6220-mailbox.txt | 13 --------------------
14 - compatible: Shall be "hisilicon,hi6220-mbox"
15 - reg: Contains the mailbox register address range (base
19 - #mbox-cells: Common mailbox binding property to identify the number
26 TX/RX interrupt to application processor,
28 - interrupts: Contains the interrupt information for the mailbox
29 device. The format is dependent on which interrupt
33 --------------------
34 - hi6220,mbox-tx-noirq: Property of MCU firmware's feature, so mailbox driver
40 --------
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| /linux/Documentation/sound/designs/ |
| H A D | seq-oss.rst | 15 What this does - it provides the emulation of the OSS sequencer, access
41 are dependent on the synth driver, as well as even on original OSS.
53 However, each MIDI device is exclusive - that is, if a MIDI device
54 is opened once by some application, other applications can't use
57 * Real-time event processing:
60 ioctl. To switch to real-time mode, send ABSTIME 0 event. The followed
61 events will be processed in real-time without queued. To switch off the
62 real-time mode, send RELTIME 0 event.
74 Run configure script with both sequencer support (``--with-sequencer=yes``)
75 and OSS emulation (``--with-oss=yes``) options. A module ``snd-seq-oss.o``
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| /linux/include/uapi/linux/ |
| H A D | msg.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
65 * MSGMNB is the default size of a new message queue. Non-root tasks can
68 * size. The optimal value is application dependent.
72 * (per-namespace) limit that applies for all message queues.
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| /linux/arch/microblaze/kernel/ |
| H A D | exceptions.c | 4 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
13 * This file handles the architecture-dependent parts of hardware exceptions
53 /* for user application debugging */
56 _exception(SIGTRAP, regs, TRAP_BRKPT, regs->r16); in sw_exception()
57 flush_dcache_range(regs->r16, regs->r16 + 0x4); in sw_exception()
58 flush_icache_range(regs->r16, regs->r16 + 0x4); in sw_exception()
72 addr = regs->pc; in full_exception()
77 (unsigned int) regs->pc, (unsigned int) regs->esr); in full_exception()
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| /linux/include/uapi/sound/ |
| H A D | firewire.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
30 unsigned int notification; /* DICE-specific bits */
33 #define SND_EFW_TRANSACTION_USER_SEQNUM_MAX ((__u32)((__u16)~0) - 1)
51 __u32 message; /* Digi00x-specific message */
56 __u32 message; /* MOTU-specific bits. */
77 * struct snd_firewire_event_ff400_message - the container for message from Fireface 400 when
139 * Returns -EBUSY if the driver is already streaming.
150 * - 828mk2
151 * - 896hd
152 * - Traveler
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| /linux/drivers/media/dvb-frontends/drx39xyj/ |
| H A D | drxj.h | 3 Copyright (c), 2004-2005,2007-2010 Trident Microsystems, Inc.
38 /*-------------------------------------------------------------------------
40 -------------------------------------------------------------------------*/
45 /* Check DRX-J specific dap condition */
55 /*-------------------------------------------------------------------------
57 -------------------------------------------------------------------------*/
151 * AGC status information from the DRXJ-IQM-AF.
175 u16 output_level; /* range dependent on AGC */
176 u16 min_output_level; /* range dependent on AGC */
177 u16 max_output_level; /* range dependent on AGC */
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