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/Linux-v6.1/Documentation/devicetree/bindings/pwm/
Dmicrochip,corepwm.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Conor Dooley <conor.dooley@microchip.com>
16 https://www.microsemi.com/existing-parts/parts/152118
19 - $ref: pwm.yaml#
24 - const: microchip,corepwm-rtl-v4
32 "#pwm-cells":
35 microchip,sync-update-mask:
46 Each bit of "microchip,sync-update-mask" corresponds to a PWM channel & represents
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/Linux-v6.1/drivers/firmware/efi/
Dmemmap.c1 // SPDX-License-Identifier: GPL-2.0
55 * efi_memmap_alloc - Allocate memory for the EFI memory map
68 WARN_ON(data->phys_map || data->size); in efi_memmap_alloc()
70 data->size = num_entries * efi.memmap.desc_size; in efi_memmap_alloc()
71 data->desc_version = efi.memmap.desc_version; in efi_memmap_alloc()
72 data->desc_size = efi.memmap.desc_size; in efi_memmap_alloc()
73 data->flags &= ~(EFI_MEMMAP_SLAB | EFI_MEMMAP_MEMBLOCK); in efi_memmap_alloc()
74 data->flags |= efi.memmap.flags & EFI_MEMMAP_LATE; in efi_memmap_alloc()
77 data->flags |= EFI_MEMMAP_SLAB; in efi_memmap_alloc()
78 data->phys_map = __efi_memmap_alloc_late(data->size); in efi_memmap_alloc()
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/Linux-v6.1/drivers/staging/r8188eu/
DTODO1 To-do list:
4 at https://www.kernel.org/doc/html/latest/process/coding-style.html.
8 * Use in-kernel API and remove unnecessary wrappers where possible.
10 * Remove the HAL layer and migrate its functionality into the relevant parts of
16 existing kernel APIs.
/Linux-v6.1/Documentation/userspace-api/
Dunshare.rst10 ----------
14 --------
26 -----------
37 outside the confinement of all-or-nothing shared resources of legacy
45 Al Viro in the August of 2000, on the Linux-Kernel mailing list, as part
53 -----------
59 even non-threaded applications if they have a need to disassociate
60 from default shared namespace. The following lists two use-cases
63 2.1 Per-security context namespaces
67 the kernel's per-process namespace mechanism. Polyinstantiated directories,
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/Linux-v6.1/Documentation/admin-guide/mm/
Dnommu-mmap.rst2 No-MMU memory mapping support
5 The kernel has limited support for memory mapping under no-MMU conditions, such
16 The behaviour is similar between the MMU and no-MMU cases, but not identical;
21 In the MMU case: VM regions backed by arbitrary pages; copy-on-write
24 In the no-MMU case: VM regions backed by arbitrary contiguous runs of
31 the no-MMU case doesn't support these, behaviour is identical to
39 In the no-MMU case:
41 - If one exists, the kernel will re-use an existing mapping to the
45 - If possible, the file mapping will be directly on the backing device
50 - If the backing device can't or won't permit direct sharing,
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/Linux-v6.1/Documentation/driver-api/usb/
Ddma.rst12 though they still must provide DMA-ready buffers (see
13 Documentation/core-api/dma-api-howto.rst). That's how they've worked through
14 the 2.4 (and earlier) kernels, or they can now be DMA-aware.
16 DMA-aware usb drivers:
18 - New calls enable DMA-aware drivers, letting them allocate dma buffers and
19 manage dma mappings for existing dma-ready buffers (see below).
21 - URBs have an additional "transfer_dma" field, as well as a transfer_flags
25 - "usbcore" will map this DMA address, if a DMA-aware driver didn't do
29 - There's a new "generic DMA API", parts of which are usable by USB device
37 and effects like cache-trashing can impose subtle penalties.
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/Linux-v6.1/drivers/net/ethernet/sfc/siena/
Defx.h1 /* SPDX-License-Identifier: GPL-2.0-only */
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2006-2013 Solarflare Communications Inc.
23 return INDIRECT_CALL_1(tx_queue->efx->type->tx_enqueue, in efx_enqueue_skb()
35 if (channel->rx_pkt_n_frags) in efx_rx_flush_packet()
39 /* Maximum number of TCP segments we support for soft-TSO */
57 return efx->rss_spread > 1; in efx_rss_enabled()
63 * efx_filter_insert_filter - add or replace a filter
67 * existing filter with equal priority
72 * If existing filters have equal match values to the new filter spec,
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/Linux-v6.1/drivers/net/ethernet/sfc/
Defx.h1 /* SPDX-License-Identifier: GPL-2.0-only */
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2006-2013 Solarflare Communications Inc.
28 return INDIRECT_CALL_2(tx_queue->efx->type->tx_enqueue, in efx_enqueue_skb()
43 if (channel->rx_pkt_n_frags) in efx_rx_flush_packet()
44 INDIRECT_CALL_2(channel->efx->type->rx_packet, in efx_rx_flush_packet()
50 if (efx->type->rx_buf_hash_valid) in efx_rx_buf_hash_valid()
51 return INDIRECT_CALL_1(efx->type->rx_buf_hash_valid, in efx_rx_buf_hash_valid()
57 /* Maximum number of TCP segments we support for soft-TSO */
75 return efx->rss_spread > 1; in efx_rss_enabled()
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/Linux-v6.1/drivers/net/ethernet/sfc/falcon/
Defx.h1 /* SPDX-License-Identifier: GPL-2.0-only */
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2006-2013 Solarflare Communications Inc.
51 if (channel->rx_pkt_n_frags) in ef4_rx_flush_packet()
63 /* Maximum number of TCP segments we support for soft-TSO */
75 return efx->rss_spread > 1; in ef4_rss_enabled()
83 * ef4_filter_insert_filter - add or replace a filter
87 * existing filter with equal priority
92 * If existing filters have equal match values to the new filter spec,
96 * 1. If the existing filters have lower priority, or @replace_equal
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/Linux-v6.1/Documentation/gpu/rfc/
Di915_scheduler.rst54 * Remove in-order completion assumptions from DRM scheduler
75 * -1k to -1 Low priority
84 ----------------
86 * https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/chap5.html#devsandqueues-priori…
87 * https://spec.oneapi.com/level-zero/latest/core/api.html#ze-command-queue-priority-t
91 The existing bonding uAPI is completely broken with GuC submission because
102 The new parallel submission uAPI consists of 3 parts:
110 ------------------------------
112 (e.g. split-frame on gen11+). The logical mapping of engine instances can change
114 logical mapping with the existing query engine info IOCTL. Also the GuC
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Di915_vm_bind.h1 /* SPDX-License-Identifier: MIT */
20 * any existing mappings.
32 * Flag to opt-in for VM_BIND mode of binding during VM creation.
51 * struct drm_i915_gem_timeline_fence - An input or output timeline fence.
74 #define __I915_TIMELINE_FENCE_UNKNOWN_FLAGS (-(I915_TIMELINE_FENCE_SIGNAL << 1))
86 * struct drm_i915_gem_vm_bind - VA to object mapping to bind.
98 * table. On those platforms, for binding device local-memory objects, the
103 * Error code -EINVAL will be returned if @start, @offset and @length are not
105 * -ENOSPC will be returned if the VA range specified can't be reserved.
108 * are not ordered. Furthermore, parts of the VM_BIND operation can be done
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/Linux-v6.1/Documentation/driver-api/
Dedac.rst5 ----------------------------------------
8 *sockets, *socket sets*, *banks*, *rows*, *chip-select rows*, *channels*,
43 It is typically the highest hierarchy on a Fully-Buffered DIMM memory
52 * Single-channel
55 only. E. g. if the data is 64 bits-wide, the data flows to the CPU using
57 memories. FB-DIMM and RAMBUS use a different concept for channel, so
60 * Double-channel
63 dimms, accessed at the same time. E. g. if the DIMM is 64 bits-wide (72
67 * Chip-select row
70 accessed. Common chip-select rows for single channel are 64 bits, for
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Dreset.rst1 .. SPDX-License-Identifier: GPL-2.0-only
12 The reset controller API is split into two parts:
13 the `consumer driver interface <#consumer-driver-interface>`__ (`API reference
14 <#reset-consumer-api>`__), which allows peripheral drivers to request control
16 <#reset-controller-driver-interface>`__ (`API reference
17 <#reset-controller-driver-api>`__), which is used by drivers for reset
25 --------
39 is self-clearing and can be used to trigger a predetermined pulse on the
64 reset inputs, which are mapped to an actual reset control on an existing reset
71 ---------------------------
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/Linux-v6.1/drivers/gpu/drm/
Ddrm_aperture.c1 // SPDX-License-Identifier: MIT
15 * graphics drivers, such as EFI-GOP or VESA, early during the boot process.
17 * hardware-specific driver. To take over the device the dedicated driver
19 * ownership of DRM framebuffer memory and hand-over between drivers.
27 * .. code-block:: c
42 * primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
79 * .. code-block:: c
87 * return -EINVAL;
88 * base = mem->start;
123 * devm_aperture_acquire_from_firmware - Acquires ownership of a firmware framebuffer
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/Linux-v6.1/Documentation/devicetree/bindings/eeprom/
Dat25.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
10 - Christian Eggers <ceggers@arri.de>
15 - pattern: "^eeprom@[0-9a-f]{1,2}$"
16 - pattern: "^fram@[0-9a-f]{1,2}$"
20 # 'vendor' and 'model' parts of the first are the actual chip and the second
21 # item is fixed to "atmel,at25". Some existing bindings only have the
26 - items:
27 - enum:
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/Linux-v6.1/Documentation/dev-tools/kunit/
Darchitecture.rst1 .. SPDX-License-Identifier: GPL-2.0
7 The KUnit architecture can be divided into two parts:
9 - `In-Kernel Testing Framework`_
10 - `kunit_tool (Command Line Test Harness)`_
12 In-Kernel Testing Framework
18 - Organizes tests
19 - Reports test results
20 - Provides test utilities
23 ----------
32 ``generate_params`` is optional for non-parameterized tests.
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Dstyle.rst1 .. SPDX-License-Identifier: GPL-2.0
15 1. Porting tests to KUnit which are already known with an existing name.
17 example, non-deterministically producing false positives or negatives, or
25 is a set of test suites which test different parts of a kernel subsystem
29 ----------
59 ``linear-ranges``
62 ``qos-kunit-test``
63 This name should use underscores, and not have "kunit-test" as a
64 suffix. ``qos`` is also ambiguous as a subsystem name, because several parts
77 ------
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/Linux-v6.1/tools/perf/tests/attr/
DREADME12 The attr tests consist of following parts:
15 ------------
18 defined. It must contain name of existing directory with access
26 -------------
31 -----------
35 perf record kill (test-record-basic)
36 perf record -b kill (test-record-branch-any)
37 perf record -j any kill (test-record-branch-filter-any)
38 perf record -j any_call kill (test-record-branch-filter-any_call)
39 perf record -j any_ret kill (test-record-branch-filter-any_ret)
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/Linux-v6.1/drivers/video/
Daperture.c1 // SPDX-License-Identifier: MIT
21 * graphics drivers, such as EFI-GOP or VESA, early during the boot process.
23 * hardware-specific driver. To take over the device the dedicated driver
25 * ownership of framebuffer memory and hand-over between drivers.
32 * .. code-block:: c
42 * return -ENODEV;
43 * base = mem->start;
61 * The given example reads the platform device's I/O-memory range from the
82 * .. code-block:: c
91 * return -ENODEV;
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/Linux-v6.1/drivers/hwmon/
Dnzxt-kraken2.c1 // SPDX-License-Identifier: GPL-2.0+
3 * nzxt-kraken2.c - hwmon driver for NZXT Kraken X42/X52/X62/X72 coolers
9 * Copyright 2019-2021 Jonas Malaco <jonas@protocubo.io>
50 if (time_after(jiffies, priv->updated + STATUS_VALIDITY * HZ)) in kraken2_read()
51 return -ENODATA; in kraken2_read()
55 *val = priv->temp_input[channel]; in kraken2_read()
58 *val = priv->fan_input[channel]; in kraken2_read()
61 return -EOPNOTSUPP; /* unreachable */ in kraken2_read()
78 return -EOPNOTSUPP; /* unreachable */ in kraken2_read_string()
108 if (size < 7 || report->id != STATUS_REPORT_ID) in kraken2_raw_event()
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/Linux-v6.1/Documentation/filesystems/
Dubifs-authentication.rst1 .. SPDX-License-Identifier: GPL-2.0
24 binary to perform a malicious action when executed [DMC-CBC-ATTACK]. Since
28 Other full disk encryption systems like dm-crypt cover all filesystem metadata,
31 time. For dm-crypt and other filesystems that build upon the Linux block IO
32 layer, the dm-integrity or dm-verity subsystems [DM-INTEGRITY, DM-VERITY]
34 These can also be combined with dm-crypt [CRYPTSETUP2].
39 existing features like key derivation can be utilized. It should however also
44 ----------------
50 addition, it deals with flash-specific wear-leveling and transparent I/O error
60 +------------+ +*******+ +-----------+ +-----+
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Dmount_api.rst1 .. SPDX-License-Identifier: GPL-2.0
37 (3) Validate and pre-process the context.
52 The first is invoked to set up the filesystem-specific parts of a filesystem
94 below). This must be set by the ->init_fs_context() file_system_type
116 superblock thereof). This is filled in by the ->get_tree() op. If this
117 is set, an active reference on root->d_sb must also be held.
175 These will be bitwise-OR'd with s->s_iflags when a superblock is created.
187 FS_CONTEXT_FOR_RECONFIGURE Change an existing mount
229 Called to clean up the filesystem-specific part of the filesystem context
230 when the context is destroyed. It should be aware that parts of the
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/Linux-v6.1/fs/btrfs/
Dextent_map.c1 // SPDX-License-Identifier: GPL-2.0
21 return -ENOMEM; in extent_map_init()
31 * extent_map_tree_init - initialize extent map tree
39 tree->map = RB_ROOT_CACHED; in extent_map_tree_init()
40 INIT_LIST_HEAD(&tree->modified_extents); in extent_map_tree_init()
41 rwlock_init(&tree->lock); in extent_map_tree_init()
45 * alloc_extent_map - allocate new extent map structure
57 RB_CLEAR_NODE(&em->rb_node); in alloc_extent_map()
58 em->compress_type = BTRFS_COMPRESS_NONE; in alloc_extent_map()
59 refcount_set(&em->refs, 1); in alloc_extent_map()
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/Linux-v6.1/Documentation/target/
Dtcmu-design.rst19 2) Writing a user pass-through handler
29 TCM is another name for LIO, an in-kernel iSCSI target (server).
30 Existing TCM targets run in the kernel. TCMU (TCM in Userspace)
34 The existing kernel provides modules for different SCSI transport
35 protocols. TCM also modularizes the data storage. There are existing
38 built-in modules are implemented entirely as kernel code.
41 ----------
52 use case that other non-kernel target solutions, such as tgt, are able
55 in these non-traditional networked storage systems, while still only
65 kernel, another approach is to create a userspace pass-through
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/Linux-v6.1/Documentation/networking/devlink/
Ddevlink-info.rst1 .. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
7 The ``devlink-info`` mechanism enables device drivers to report device
10 The original motivation for the ``devlink-info`` API was twofold:
12 - making it possible to automate device and firmware management in a fleet
13 of machines in a vendor-independent fashion (see also
14 :ref:`Documentation/networking/devlink/devlink-flash.rst <devlink_flash>`);
15 - name the per component FW versions (as opposed to the crowded ethtool
18 ``devlink-info`` supports reporting multiple types of objects. Reporting driver
19 versions is generally discouraged - here, and via any other Linux API.
21 .. list-table:: List of top level info objects
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