| /linux/Documentation/accounting/ |
| H A D | psi.rst | 4 PSI - Pressure Stall Information
14 either play it safe and under-utilize their hardware resources, or
23 scarcity aids users in sizing workloads to hardware--or provisioning
24 hardware according to workload demand.
27 dynamically using techniques such as load shedding, migrating jobs to
29 priority or restartable batch jobs.
31 This allows maximizing hardware utilization without sacrificing
37 Pressure information for each resource is exported through the
38 respective file in /proc/pressure/ -- cpu, memory, and io.
48 The "full" line indicates the share of time in which all non-idle
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| /linux/Documentation/admin-guide/cgroup-v1/ |
| H A D | cpusets.rst | 11 - Portions Copyright (c) 2004-2006 Silicon Graphics, Inc.
12 - Modified by Paul Jackson <pj@sgi.com>
13 - Modified by Christoph Lameter <cl@gentwo.org>
14 - Modified by Paul Menage <menage@google.com>
15 - Modified by Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
41 ----------------------
43 Cpusets provide a mechanism for assigning a set of CPUs and Memory
45 an on-line node that contains memory.
50 hooks, beyond what is already present, required to manage dynamic
54 Documentation/admin-guide/cgroup-v1/cgroups.rst.
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| /linux/include/uapi/drm/ |
| H A D | pvr_drm.h | 1 /* SPDX-License-Identifier: (GPL-2.0-only WITH Linux-syscall-note) OR MIT */
22 * - All members must be type-aligned.
23 * - The overall struct must be padded to 64-bit alignment.
24 * - Explicit padding is almost always required. This takes the form of
25 * ``_padding_[x]`` members of sufficient size to pad to the next power-of-two
27 * are never used for alignment. Padding fields must be zeroed; this is
29 * - Unions may only appear as the last member of a struct.
30 * - Individual union members may grow in the future. The space between the
41 * struct drm_pvr_obj_array - Container used to pass arrays of objects
56 /** @stride: Stride of object struct. Used for versioning. */
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| H A D | habanalabs_accel.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
3 * Copyright 2016-2023 HabanaLabs, Ltd.
14 * Defines that are asic-specific but constitutes as ABI between kernel driver
21 * 128 SOBs reserved for collective wait
22 * 16 SOBs reserved for sync stream
27 * 64 monitors reserved for collective wait
28 * 8 monitors reserved for sync stream
189 * 2. F/W mode, where we use F/W to schedule the JOBS to the different queues.
195 * stream id is a running number from 0 up to (N-1), where N is the number
656 * enum hl_goya_dma_direction - Direction of DMA operation inside a LIN_DMA packet that is
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| /linux/Documentation/gpu/rfc/ |
| H A D | i915_vm_bind.rst | 11 issued by the UMD, without user having to provide a list of all required
12 mappings during each submission (as required by older execbuf mode).
14 The VM_BIND/UNBIND calls allow UMDs to request a timeline out fence for
18 User has to opt-in for VM_BIND mode of binding for an address space (VM)
31 * Support for userptr gem objects (no special uapi is required for this).
34 ------------------------
35 The i915 driver flushes the TLB for each submission and when an object's
37 TLB flush. Any VM_BIND mapping added will be in the working set for subsequent
38 submissions on that VM and will not be in the working set for currently running
42 -------------------------------
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| /linux/Documentation/driver-api/ |
| H A D | dma-buf.rst | 1 Buffer Sharing and Synchronization (dma-buf)
4 The dma-buf subsystem provides the framework for sharing buffers for
5 hardware (DMA) access across multiple device drivers and subsystems, and
6 for synchronizing asynchronous hardware access.
14 interact with the three main primitives offered by dma-buf:
16 - dma-buf, representing a sg_table and exposed to userspace as a file
19 - dma-fence, providing a mechanism to signal when an asynchronous
20 hardware operation has completed; and
21 - dma-resv, which manages a set of dma-fences for a particular dma-buf
22 allowing implicit (kernel-ordered) synchronization of work to
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| /linux/Documentation/gpu/ |
| H A D | tegra.rst | 8 or blocks amongst themselves, can use syncpoints for synchronization.
11 supports the built-in GPU, comprised of the gr2d and gr3d engines. Starting
18 - A host1x driver that provides infrastructure and access to the host1x
21 - A KMS driver that supports the display controllers as well as a number of
24 - A set of custom userspace IOCTLs that can be used to submit jobs to the
35 tree for matching device nodes, adding the required clients to a list. Drivers
36 for individual clients register with the infrastructure as well and are added
40 device using a driver-provided function which will set up the bits specific to
48 -------------------------------
50 .. kernel-doc:: include/linux/host1x.h
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| /linux/drivers/dma/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
21 This is an option for use by developers; most people should
28 This is an option for use by developers; most people should
65 Enable support for Altera / Intel mSGDMA controller.
86 Enable support for the AMCC PPC440SPe RAID engines.
93 Enable support for Audio DMA Controller found on Apple Silicon SoCs.
96 tristate "Arm DMA-350 support"
101 Enable support for the Arm DMA-350 controller.
119 tristate "Analog Devices AXI-DMAC DMA support"
125 Enable support for the Analog Devices AXI-DMAC peripheral. This DMA
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| H A D | ste_dma40.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Ericsson AB 2007-2008
4 * Copyright (C) ST-Ericsson SA 2008-2010
5 * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
6 * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
9 #include <linux/dma-mapping.h>
32 * struct stedma40_platform_data - Configuration struct for the dma device.
34 * @disabled_channels: A vector, ending with -1, that marks physical channels
35 * that are for different reasons not available for the driver.
38 * SoftLLI introduces relink overhead that could impact performance for
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| H A D | amba-pl08x.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (c) 2010 ST-Ericsson SA
17 * The PL080 has 8 channels available for simultaneous use, and the PL081
27 * - CH_CONFIG register at different offset,
28 * - separate CH_CONTROL2 register for transfer size,
29 * - bigger maximum transfer size,
30 * - 8-word aligned LLI, instead of 4-word, due to extra CCTL2 word,
31 * - no support for peripheral flow control.
41 * For peripherals with a FIFO:
45 * (Bursts are irrelevant for mem to mem transfers - there are no burst
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| /linux/drivers/gpu/drm/vc4/ |
| H A D | vc4_gem.c | 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
30 #include <linux/dma-fence-array.h>
45 mod_timer(&vc4->hangcheck.timer, in vc4_queue_hangcheck()
61 for (i = 0; i < state->user_state.bo_count; i++) in vc4_free_hang_state()
62 drm_gem_object_put(state->bo[i]); in vc4_free_hang_state()
80 if (WARN_ON_ONCE(vc4->gen > VC4_GEN_4)) in vc4_get_hang_state_ioctl()
81 return -ENODEV; in vc4_get_hang_state_ioctl()
83 if (!vc4->v3d) { in vc4_get_hang_state_ioctl()
85 return -ENODEV; in vc4_get_hang_state_ioctl()
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| /linux/include/media/ |
| H A D | v4l2-mem2mem.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Memory-to-memory device framework for Video for Linux 2.
5 * Helper functions for device
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| /linux/drivers/media/platform/raspberrypi/pisp_be/ |
| H A D | pisp_be.c | 1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2021-2024 Raspberry Pi Limited.
17 #include <media/v4l2-device.h>
18 #include <media/v4l2-ioctl.h>
19 #include <media/videobuf2-dma-contig.h>
20 #include <media/videobuf2-vmalloc.h>
31 /* Some ISP-BE registers */
59 * context it means an input to the hardware (source image or metadata).
60 * Elsewhere it means an output from the hardware.
83 .ent_name = PISPBE_NAME "-input",
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| /linux/Documentation/virt/uml/ |
| H A D | user_mode_linux_howto_v2.rst | 1 .. SPDX-License-Identifier: GPL-2.0
16 release date 1991) and second virtualization platform for an x86 PC.
22 hardware emulation. In fact, it does not. As long as a virtualization
24 has a driver for, the devices do not need to emulate real hardware.
25 Most OSes today have built-in support for a number of "fake"
27 User Mode Linux takes this concept to the ultimate extreme - there
30 concepts which map onto something provided by the host - files, sockets,
36 The UML kernel is just a process running on Linux - same as any other
57 * You can run a usermode kernel as a non-root user (you may need to
58 arrange appropriate permissions for some devices).
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| /linux/drivers/gpu/drm/nouveau/ |
| H A D | nouveau_drm.c | 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
103 int nouveau_modeset = -1;
110 MODULE_PARM_DESC(runpm, "disable (0), force enable (1), optimus only default (-1)");
111 static int nouveau_runtime_pm = -1;
122 * gsp_logs - list of nvif_log GSP-RM logging buffers
124 * Head pointer to a a list of nvif_log buffers that is created for each GPU
125 * upon GSP shutdown if the "keep_gsp_logging" command-line parameter is
126 * specified. This is used to track the alternative debugfs entries for the
127 * GSP-RM logs.
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| /linux/init/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
8 - Re-run Kconfig when the compiler is updated
13 - Ensure full rebuild when the compiler is updated
14 include/linux/compiler-version.h contains this option in the comment
16 auto-generated dependency. When the compiler is updated, syncconfig
20 def_bool $(success,test "$(cc-nam
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| /linux/kernel/trace/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
21 API, which will be used by other function-entry hooking
27 See Documentation/trace/ftrace-design.rst
32 See Documentation/trace/ftrace-design.rst
45 See Documentation/trace/ftrace-design.rst
59 For architectures that use ipi_raise, ipi_entry and ipi_exit
68 This allows for use of ftrace_regs_get_argument() and
86 See Documentation/trace/ftrace-design.rst
91 Arch supports the gcc options -pg with -mfentry
96 Arch supports the gcc options -pg with -mrecord-mcount and -nop-mcount
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| /linux/Documentation/process/ |
| H A D | 2.Process.rst | 11 how the process works is required in order to be an effective part of it.
14 ---------------
16 The kernel developers use a loosely time-based release process, with a new
36 merging of patches for each release. At the beginning of each development
39 community) is merged into the mainline kernel. The bulk of changes for a
49 The merge window lasts for approximately two weeks. At the end of this
51 first of the "rc" kernels. For the kernel which is destined to be 5.6,
52 for example, the release which happens at the end of the merge window will
53 be called 5.6-rc1. The -rc1 release is the signal that the time to
61 As a general rule, if you miss the merge window for a given feature, the
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| /linux/drivers/infiniband/hw/hfi1/ |
| H A D | pcie.c | 1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
3 * Copyright(c) 2015 - 2019 Intel Corporation.
27 struct pci_dev *pdev = dd->pcidev; in hfi1_pcie_init()
37 * Both reset cases set the BAR back to initial state. For in hfi1_pcie_init()
43 dd_dev_err(dd, "pci enable failed: error %d\n", -ret); in hfi1_pcie_init()
49 dd_dev_err(dd, "pci_request_regions fails: err %d\n", -ret); in hfi1_pcie_init()
53 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); in hfi1_pcie_init()
60 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); in hfi1_pcie_init()
90 * fields required to re-initialize after a chip reset, or for
111 return -EINVAL; in hfi1_pcie_ddinit()
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| /linux/include/uapi/linux/ |
| H A D | kfd_ioctl.h | 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
30 * - 1.1 - initial version
31 * - 1.3 - Add SMI events support
32 * - 1.4 - Indicate new SRAM EDC bit in device properties
33 * - 1.5 - Ad
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| /linux/drivers/gpu/drm/etnaviv/ |
| H A D | etnaviv_gpu.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2015-2018 Etnaviv Project
9 #include <linux/dma-fence.h>
10 #include <linux/dma-mapping.h>
32 { .name = "etnaviv-gpu,2d" },
42 struct etnaviv_drm_private *priv = gpu->drm->dev_private; in etnaviv_gpu_get_param()
46 *value = gpu->identity.model; in etnaviv_gpu_get_param()
50 *value = gpu->identity.revision; in etnaviv_gpu_get_param()
54 *value = gpu->identity.features; in etnaviv_gpu_get_param()
58 *value = gpu->identity.minor_features0; in etnaviv_gpu_get_param()
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| /linux/drivers/scsi/sym53c8xx_2/ |
| H A D | sym_hipd.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
4 * of PCI-SCSI IO processors.
6 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
7 * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
10 * Copyright (C) 1998-2000 Gerard Roudier
13 * a port of the FreeBSD ncr driver to Linux-1.2.13.
15 * The original ncr driver has been written for 386bsd and FreeBSD by
17 * Stefan Esser <se@mi.Uni-Koeln.de>
25 *-----------------------------------------------------------------------------
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| /linux/drivers/crypto/axis/ |
| H A D | artpec6_crypto.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Driver for ARTPEC-6 crypto block using the kernel asynchronous crypto api.
5 * Copyright (C) 2014-2017 Axis Communications AB
13 #include <linux/dma-mapping.h>
14 #include <linux/fault-inject.h>
35 /* Max length of a line in all cache levels for Artpec SoCs. */
186 #define MODULE_NAME "Artpec-6 CA"
198 /* The PDMA is a DMA-engine tightly coupled with a ciphering engine.
203 * a 4-byte metadata that is inserted at the beginning of each dma packet.
208 * Multiple packets are used for providing context data, key data and
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| /linux/include/linux/ |
| H A D | zstd_lib.h | 1 /* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
6 * This source code is licensed under both the BSD-style license (found in the
9 * You may select, at your option, one of the above-listed licenses.
40 * typically with -Wno-deprecated-declarations for gcc or _CRT_SECURE_NO_WARNINGS in Visual.
51 # pragma message("WARNING: You need to implement ZSTD_DEPRECATED for this compiler")
60 zstd, short for Zstandard, is a fast lossless compression algorithm, targeting
61 real-time compression scenarios at zlib-level and better compression ratios.
62 The zstd compression library provides in-memory compression and decompression
66 which is currently 22. Levels >= 20, labeled `--ultra`, should be used with
72 - a single step (described as Simple API)
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| /linux/drivers/isdn/hardware/mISDN/ |
| H A D | hfcmulti.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * hfcmulti.c low level driver for hfc-4s/hfc-8s/hfc-e1 based cards
7 * Peter Sprenger (sprengermoving-bytes.de)
9 * inspired by existing hfc-pci driver:
10 * Copyright 1999 by Werner Cornelius (werner@isdn-development.de)
14 * Thanks to Cologne Chip AG for this great controller!
22 * Bit 0-7 = 0x00001 = HFC-E1 (1 port)
23 * or Bit 0-7 = 0x00004 = HFC-4S (4 ports)
24 * or Bit 0-7 = 0x00008 = HFC-8S (8 ports)
26 * Bit 9 = 0x00200 = Disable DTMF detect on all B-channels via hardware
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