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/linux/drivers/gpu/drm/
H A Ddrm_gem_atomic_helper.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 #include <linux/dma-resv.h>
4 #include <linux/dma-fence-chain.h>
20 * The GEM atomic helpers library implements generic atomic-commit
33 * .. code-block:: c
45 * cannot be established by commit-tail functions, such as atomic_update,
48 * The helpers for shadow-buffered planes establish and release mappings,
50 * for commit-tail functions.
52 * Shadow-buffered planes can easily be enabled by using the provided macros
54 * These macros set up the plane and plane-helper callbacks to point to the
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/linux/Documentation/devicetree/bindings/iio/adc/
H A Dadi,ad4130.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Cosmin Tanislav <cosmin.tanislav@analog.com>
15 https://www.analog.com/media/en/technical-documentation/data-sheets/AD4130-8.pdf
20 - adi,ad4130
29 clock-names:
31 - const: mclk
36 interrupt-names:
42 - int
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H A Dadi,max11410.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Ibrahim Tilki <Ibrahim.Tilki@analog.com>
21 - adi,max11410
30 interrupt-names:
34 - enum: [gpio0, gpio1]
35 - const: gpio1
37 '#address-cells':
40 '#size-cells':
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H A Dadi,ad4851.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Sergiu Cuciurean <sergiu.cuciurean@analog.com>
12 - Dragos Bogdan <dragos.bogdan@analog.com>
13 - Antoniu Miclaus <antoniu.miclaus@analog.com>
16 Analog Devices AD485X fully buffered, 8-channel simultaneous sampling,
17 16/20-bit, 1 MSPS data acquisition system (DAS) with differential, wide
18 common-mode range inputs.
20 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4855.pdf
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/linux/drivers/net/ethernet/engleder/
H A Dtsnep_ptp.c1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2021 Gerhard Engleder <gerhard@engleder-embedded.com> */
13 high = ioread32(adapter->addr + ECM_SYSTEM_TIME_HIGH); in tsnep_get_system_time()
15 low = ioread32(adapter->addr + ECM_SYSTEM_TIME_LOW); in tsnep_get_system_time()
17 high = ioread32(adapter->addr + ECM_SYSTEM_TIME_HIGH); in tsnep_get_system_time()
28 return -EINVAL; in tsnep_ptp_ioctl()
31 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) in tsnep_ptp_ioctl()
32 return -EFAULT; in tsnep_ptp_ioctl()
39 return -ERANGE; in tsnep_ptp_ioctl()
62 return -ERANGE; in tsnep_ptp_ioctl()
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/linux/fs/nilfs2/
H A Dbtnode.c1 // SPDX-License-Identifier: GPL-2.0+
3 * NILFS B-tree node cache
5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
15 #include <linux/backing-dev.h>
25 * nilfs_init_btnc_inode - initialize B-tree node cache inode
28 * nilfs_init_btnc_inode() sets up an inode for B-tree node cache.
34 btnc_inode->i_mode = S_IFREG; in nilfs_init_btnc_inode()
35 ii->i_flags = 0; in nilfs_init_btnc_inode()
36 memset(&ii->i_bmap_data, 0, sizeof(struct nilfs_bmap)); in nilfs_init_btnc_inode()
37 mapping_set_gfp_mask(btnc_inode->i_mapping, GFP_NOFS); in nilfs_init_btnc_inode()
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/linux/fs/netfs/
H A Dread_collect.c1 // SPDX-License-Identifier: GPL-2.0-only
20 #define BUFFERED 0x08 /* The pagecache needs cleaning up */ macro
31 WARN_ON_ONCE(subreq->len - subreq->transferred != iov_iter_count(&subreq->io_iter)); in netfs_clear_unread()
32 iov_iter_zero(iov_iter_count(&subreq->io_iter), &subreq->io_iter); in netfs_clear_unread()
33 if (subreq->start + subreq->transferred >= subreq->rreq->i_size) in netfs_clear_unread()
34 __set_bit(NETFS_SREQ_HIT_EOF, &subreq->flags); in netfs_clear_unread()
49 if (unlikely(folio_pos(folio) < rreq->abandon_to)) { in netfs_unlock_read_folio()
57 if (!test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags)) { in netfs_unlock_read_folio()
61 if (finfo->netfs_group) in netfs_unlock_read_folio()
62 folio_change_private(folio, finfo->netfs_group); in netfs_unlock_read_folio()
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H A Ddirect_write.c1 // SPDX-License-Identifier: GPL-2.0-or-later
20 unsigned long long start = iocb->ki_pos; in netfs_unbuffered_write_iter_locked()
34 _debug("uw %llx-%llx", start, end); in netfs_unbuffered_write_iter_locked()
36 wreq = netfs_create_write_req(iocb->ki_filp->f_mapping, iocb->ki_filp, start, in netfs_unbuffered_write_iter_locked()
37 iocb->ki_flags & IOCB_DIRECT ? in netfs_unbuffered_write_iter_locked()
42 wreq->io_streams[0].avail = true; in netfs_unbuffered_write_iter_locked()
43 trace_netfs_write(wreq, (iocb->ki_flags & IOCB_DIRECT ? in netfs_unbuffered_write_iter_locked()
57 n = netfs_extract_user_iter(iter, len, &wreq->buffer.iter, 0); in netfs_unbuffered_write_iter_locked()
62 wreq->direct_bv = (struct bio_vec *)wreq->buffer.iter.bvec; in netfs_unbuffered_write_iter_locked()
63 wreq->direct_bv_count = n; in netfs_unbuffered_write_iter_locked()
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H A Dbuffered_write.c1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Network filesystem high-level buffered write support.
66 if (ctx->ops->update_i_size) { in netfs_update_i_size()
67 ctx->ops->update_i_size(inode, end); in netfs_update_i_size()
71 spin_lock(&inode->i_lock); in netfs_update_i_size()
77 fscache_update_cookie(ctx->cache, NULL, &end); in netfs_update_i_size()
80 gap = SECTOR_SIZE - (i_size & (SECTOR_SIZE - 1)); in netfs_update_i_size()
82 add = DIV_ROUND_UP(copied - gap, SECTOR_SIZE); in netfs_update_i_size()
84 inode->i_blocks = min_t(blkcnt_t, in netfs_update_i_size()
86 inode->i_blocks + add); in netfs_update_i_size()
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H A Dbuffered_read.c1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Network filesystem high-level buffered read support.
17 struct netfs_cache_resources *cres = &rreq->cache_resources; in netfs_cache_expand_readahead()
19 if (cres->ops && cres->ops->expand_readahead) in netfs_cache_expand_readahead()
20 cres->ops->expand_readahead(cres, _start, _len, i_size); in netfs_cache_expand_readahead()
29 netfs_cache_expand_readahead(rreq, &rreq->start, &rreq->len, rreq->i_size); in netfs_rreq_expand()
34 if (rreq->netfs_ops->expand_readahead) in netfs_rreq_expand()
35 rreq->netfs_ops->expand_readahead(rreq); in netfs_rreq_expand()
46 if (rreq->start != readahead_pos(ractl) || in netfs_rreq_expand()
47 rreq->len != readahead_length(ractl)) { in netfs_rreq_expand()
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/linux/net/batman-adv/
H A Dfragmentation.c1 // SPDX-License-Identifier: GPL-2.0
26 #include "hard-interface.h"
31 * batadv_frag_clear_chain() - delete entries in the fragment buffer chain
43 hlist_del(&entry->list); in batadv_frag_clear_chain()
46 kfree_skb(entry->skb); in batadv_frag_clear_chain()
48 consume_skb(entry->skb); in batadv_frag_clear_chain()
55 * batadv_frag_purge_orig() - free fragments associated to an orig
66 chain = &orig_node->fragments[i]; in batadv_frag_purge_orig()
67 spin_lock_bh(&chain->lock); in batadv_frag_purge_orig()
70 batadv_frag_clear_chain(&chain->fragment_list, true); in batadv_frag_purge_orig()
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H A Dsend.c1 // SPDX-License-Identifier: GPL-2.0
31 #include "distributed-arp-table.h"
34 #include "hard-interface.h"
36 #include "mesh-interface.h"
39 #include "translation-table.h"
44 * batadv_send_skb_packet() - send an already prepared packet
57 * Return: A negative errn
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/linux/drivers/usb/serial/
H A Dgeneric.c1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2010 - 2013 Johan Hovold (jhovold@gmail.com)
6 * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
40 struct device *dev = &serial->interface->dev; in usb_serial_generic_probe()
42 dev_info(dev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n"); in usb_serial_generic_probe()
43 dev_info(dev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n"); in usb_serial_generic_probe()
51 struct device *dev = &serial->interface->dev; in usb_serial_generic_calc_num_ports()
54 num_ports = max(epds->num_bulk_in, epds->num_bulk_out); in usb_serial_generic_calc_num_ports()
58 return -ENODEV; in usb_serial_generic_calc_num_ports()
109 clear_bit(USB_SERIAL_THROTTLED, &port->flags); in usb_serial_generic_open()
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H A Ddigi_acceleport.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Digi AccelePort USB-4 and USB-2 Serial Converters
7 * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's
8 * usb-serial driver.
31 #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver"
33 /* port output buffer length -- must be <= transfer buffer length - 2 */
37 /* port input buffer length -- must be >= transfer buffer length - 3 */
54 #define DIGI_2_ID 0x0002 /* USB-2 */
55 #define DIGI_4_ID 0x0004 /* USB-4 */
58 * "INB": can be used on the in-band endpoint
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/linux/Documentation/userspace-api/media/v4l/
H A Dvidioc-decoder-cmd.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_DECODER_CMD - VIDIOC_TRY_DECODER_CMD - Execute an decoder command
38 These ioctls control an audio/video (usually MPEG-) decoder.
55 command to the decoder, and all buffered data is discarded. Applies to both
68 .. flat-table:: struct v4l2_decoder_cmd
69 :header-rows: 0
70 :stub-columns: 0
73 * - __u32
74 - ``cmd``
75 -
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/linux/block/
H A Dblk-wbt.c1 // SPDX-License-Identifier: GPL-2.0
3 * buffered writeback throttling. loosely based on CoDel. We can't drop
6 * - Monitor latencies in a defined window of time.
7 * - If the minimum latency in the above window exceeds some target, increment
10 * - For any window where we don't have solid data on what the latencies
12 * - If latencies look good, decrement scaling step.
13 * - If we're only doing writes, allow the scaling step to go negative. This
16 * positive scaling steps where we shrink the monitoring window, a negative
25 #include <linux/backing-dev.h>
28 #include "blk-stat.h"
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/linux/include/net/
H A Dmac80211.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * mac80211 <-> driver interface
5 * Copyright 2002-2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 201
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/linux/drivers/gpu/drm/i915/
H A Di915_perf.c2 * Copyright © 2015-2016 Intel Corporation
39 * The interface is particularly suited to exposing buffered metrics that are
44 * without special privileges. Access to system-wide metrics requires root
58 * might sample sets of tightly-coupled counters, depending on the
70 * interleaved with event-type specific members.
76 * would be acceptable to expose them to unprivileged applications - to hide
96 * side-band OA data captured via MI_REPORT_PERF_COUNT commands; we're
102 * For posterity, in case we might re-visit trying to adapt core perf to be
106 * - The perf based OA PMU driver broke some significant design assumptions:
110 * implications, the need to fake cpu-related data (such as user/kernel
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/linux/Documentation/filesystems/iomap/
H A Ddesign.rst1 .. SPDX-License-Identifier: GPL-2.0
78 1. Obtain a space mapping via ``->iomap_begin``
80 2. For each sub-unit of work...
89 4. Release the mapping via ``->iomap_end``, if necessary
105 -----------
127 device pre-shutdown hook from returning before other threads have
152 ----------------
158 .. code-block:: c
192 ``->iomap_end`` function must delete the reservation.
211 For write operation, the ``->iomap_end`` function presumably
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/linux/Documentation/scsi/
H A Dst.rst1 .. SPDX-License-Identifier: GPL-2.0
23 flexible method and applicable to single-user workstations. However,
32 drive performs auto-detection of the tape format well (like some
33 QIC-drives). The result is that any tape can be read, writing can be
37 does not perform auto-detection well enough and there is a single
40 or not :-).
56 users (buffered and asynchronous writes). The modes also allow choices
57 between formats in multi-tape operations (the explicitly overridden
72 limits). Both the auto-rewind (minor equals device number) and
73 non-rewind devices (minor is 128 + device number) are implemented.
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/linux/drivers/input/mouse/
H A Dcyapa_gen5.c6 * Copyright (C) 2014-2015 Cypress Semiconductor, Inc.
21 #include <linux/crc-itu-t.h>
33 #define CYAPA_TSG_IMG_MAX_RECORDS (CYAPA_TSG_IMG_END_ROW_NUM - \
141 * Bit 7 - 3: reserved
142 * Bit 2 - 0: touch type;
146 * 3 - 15 : reserved.
154 * Bit 6 - 5: indicates an event associated with this touch instance
159 * Bit 4 - 0: An arbitrary ID tag associated with a finger
164 /* Bit 7 - 0 of X-axis coordinate of the touch in pixel. */
167 /* Bit 15 - 8 of X-axis coordinate of the touch in pixel. */
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/linux/mm/
H A Dfilemap.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 1994-1999 Linus Torvalds
30 #include <linux/error-injection.h>
33 #include <linux/backing-dev.h>
73 * finished 'unifying' the page and buffer cache and SMP-threaded the
74 * page-cache, 21.05.1999, Ingo Molnar <mingo@redhat.com>
76 * SMP-threaded pagemap-LRU 1999, Andrea Arcangeli <andrea@suse.de>
82 * ->i_mmap_rwsem (truncate_pagecache)
83 * ->private_lock (__free_pte->block_dirty_folio)
84 * ->swap_lock (exclusive_swap_page, others)
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/linux/drivers/edac/
H A Dr82600_edac.c14 * www.radisys.com/files/support_downloads/007-01277-0002.82600DataBook.pdf
37 * signals buffered) and unbuffered DIMM types are supported. Mixing of
38 * registered and unbuffered DIMMs as well as mixing of ECC and non-ECC DIMMs
49 /* Radisys 82600 register addresses - device 0 function 0 - PCI bridge */
125 * 7:0 Address lines 30:24 - upper limit of
142 pdev = to_pci_dev(mci->pdev); in r82600_get_error_info()
143 pci_read_config_dword(pdev, R82600_EAP, &info->eapr); in r82600_get_error_info()
145 if (info->eapr & BIT(0)) in r82600_get_error_info()
151 if (info->eapr & BIT(1)) in r82600_get_error_info()
169 eapaddr = ((info->eapr >> 12) & 0x7FFF) << 13; in r82600_process_error_info()
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/linux/Documentation/filesystems/
H A Dvfs.rst1 .. SPDX-License-Identifier: GPL-2.0
9 - Copyright (C) 1999 Richard Gooch
10 - Copyright (C) 2005 Pekka Enberg
27 ------------------------------
32 cache or dcache). This provides a very fast look-up mechanism to
44 ----------------
64 ---------------
67 structure (this is the kernel-side implementation of file descriptors).
88 .. code-block:: c
99 ->mount() will be attached to the mountpoint, so that when pathname
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/linux/include/linux/
H A Dhid.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
4 * Copyright (c) 2000-2001 Vojtech Pavlik
5 * Copyright (c) 2006-2007 Jiri Kosina
10 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
33 * values are expanded to 32-bit signed int, long items contain a pointer
190 * System Multi-Axis, see:
191 …* http://www.usb.org/developers/hidpage/HUTRR62_-_Generic_Desktop_CA_for_System_Multi-Axis_Control…
459 * persistent for main-items. The global environment can be saved and
477 * This is the local environment. It is persistent up the next main-item.
499 int parent_idx; /* device->collection */
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