| /linux/net/ipv4/ |
| H A D | tcp_bbr.c | 21 * +---> STARTUP ----+
24 * | DRAIN ----+
27 * +---> PROBE_BW ----+
30 * | +----+ |
32 * +---- PROBE_RTT <--+
37 * A long-lived BBR flow spends the vast majority of its time remaining
42 * it briefly enters PROBE_RTT to cut inflight to a minimum value to re-probe
43 * the path's two-way propagation delay (min_rtt). When exiting PROBE_RTT, if
48 * "BBR: Congestion-Based Congestion Control",
50 * Van Jacobson. ACM Queue, Vol. 14 No. 5, September-October 2016.
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| H A D | tcp_vegas.c | 1 // SPDX-License-Identifier: GPL-2.0-only
8 * IEEE Journal on Selected Areas in Communication, 13(8):1465--1480,
17 * using fine-grained timers, NewReno, and FACK.
19 * only every-other RTT during slow start, we increase during
29 * o When the sender re-starts from idle, it waits until it has
55 /* There are several situations when we must "re-start" Vegas:
65 * stale info -- both the saved cwnd and congestion feedback are
77 vegas->doing_vegas_now = 1; in vegas_enable()
80 vegas->beg_snd_nxt = tp->snd_nxt; in vegas_enable()
82 vegas->cntRTT = 0; in vegas_enable()
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| /linux/Documentation/admin-guide/hw-vuln/ |
| H A D | gather_data_sampling.rst | 1 .. SPDX-License-Identifier: GPL-2.0
3 GDS - Gather Data Sampling
6 Gather Data Sampling is a hardware vulnerability which allows unprivileged
10 -------
17 attacks. GDS is a purely sampling-based attack.
24 Because the buffers are shared between Hyper-Threads cross Hyper-Thread attacks
28 ----------------
32 Non-enclaves can infer SGX enclave data
39 lower-privilege contexts like guests and when running outside SGX enclaves.
44 attack, and re-enable it.
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| /linux/sound/usb/ |
| H A D | card.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
16 unsigned int fmt_type; /* USB audio format type (1-3) */
19 unsigned int frame_size; /* samples per frame for non-audio */
69 int opened; /* open refcount; protect with chip->mutex */
112 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
113 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
115 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
132 bool lowlatency_playback; /* low-latency playback mode */
133 bool need_setup; /* (re-)need for hw_params? */
134 bool need_prepare; /* (re-)need for prepare? */
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| /linux/sound/soc/tegra/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
5 tristate "SoC Audio for the Tegra System-on-Chip"
85 Config to enable the Inter-IC Sound (I2S) Controller which
86 implements full-duplex and bidirectional and single direction
87 point-to-point serial interfaces. It can interface with I2S
104 which converts the sampling frequency of the input signal from
116 converts the multi-bit Pulse Code Modulation (PCM) audio input to
117 oversampled 1-bit Pulse Density Modulation (PDM) output. From the
119 that up-samples the input to the desired sampling rate by
121 the desired 1-bit output via Delta Sigma Modulation (DSM).
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| /linux/sound/aoa/soundbus/ |
| H A D | soundbus.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
22 * The constants here are codec-point of view, so when we switch
23 * the soundbus to master we tell the codec we're going to switch
54 * what we're going to drive the bus with */
71 * to be used (master clock speed = sysclock_factor * sampling freq)
76 /* Bus factor, bus clock speed = bus_factor * sampling freq)
89 * That can depend on other user-switchable controls.
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| /linux/arch/s390/kernel/ |
| H A D | perf_cpum_sf.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Performance event support for the System z CPU-measurement Sampling Facility
26 /* Perf PMU definitions for the sampling facility */
28 #define PERF_EVENT_CPUM_SF 0xB0000UL /* Event: Basic-sampling */
29 #define PERF_EVENT_CPUM_SF_DIAG 0xBD000UL /* Event: Combined-sampling */
30 #define PERF_CPUM_SF_BASIC_MODE 0x0001 /* Basic-sampling flag */
31 #define PERF_CPUM_SF_DIAG_MODE 0x0002 /* Diagnostic-sampling flag */
32 #define PERF_CPUM_SF_FREQ_MODE 0x0008 /* Sampling with frequency */
34 #define OVERFLOW_REG(hwc) ((hwc)->extra_reg.config)
35 #define SFB_ALLOC_REG(hwc) ((hwc)->extra_reg.alloc)
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| /linux/Documentation/devicetree/bindings/mmc/ |
| H A D | marvell,xenon-sdhci.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/mmc/marvell,xenon-sdhci.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 mmc-controller.yaml and the properties used by the Xenon implementation.
20 - Ulf Hansson <ulf.hansson@linaro.org>
25 - enum:
26 - marvell,armada-cp110-sdhci
27 - marvell,armada-ap806-sdhci
29 - items:
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| /linux/include/linux/ |
| H A D | psi_types.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
67 /* Only per-CPU, to weigh the CPU in the global average: */
75 /* Flag whether to re-arm avgs_work, see details in get_recent_times() */
94 /* Period time sampling buckets for each state of interest (ns) */
102 /* Delta detection against the sampling buckets */
126 /* User-spacified threshold in ns */
148 * Time last event was generated. Used for rate-limiting
156 /* Trigger type - PSI_AVGS for unprivileged, PSI_POLL for RT */
167 /* Per-cpu task state & time tracking */
171 u64 avg_total[NR_PSI_STATES - 1];
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| /linux/sound/firewire/dice/ |
| H A D | dice-stream.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * dice_stream.c - a part of driver for DICE based devices
6 * Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
48 if (!(dice->clock_caps & BIT(i))) in snd_dice_stream_get_rate_mode()
57 return -EINVAL; in snd_dice_stream_get_rate_mode()
80 return -EINVAL; in select_clock()
83 if (completion_done(&dice->clock_accepted)) in select_clock()
84 reinit_completion(&dice->clock_accepted); in select_clock()
92 if (wait_for_completion_timeout(&dice->clock_accepted, in select_clock()
95 return -ETIMEDOUT; in select_clock()
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| /linux/drivers/iio/pressure/ |
| H A D | zpa2326.c | 1 // SPDX-License-Identifier: GPL-2.0-only
18 * ZPA2326 hardware supports 2 sampling mode: one shot and continuous.
20 * A complete one shot sampling cycle gets device out of low power mode,
22 * back to low power mode. It is meant for on demand sampling with optimal power
23 * saving at the cost of lower sampling rate and higher software overhead.
34 * - get device out of low power mode,
35 * - setup hardware sampling period,
36 * - at end of period, upon data ready interrupt: pop pressure samples out of
38 * - when no longer needed, stop sampling process by putting device into
44 * Note that hardware sampling frequency is taken into account only when
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| /linux/Documentation/admin-guide/mm/damon/ |
| H A D | reclaim.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based Reclamation
7 DAMON-based Reclamation (DAMON_RECLAIM) is a static kernel module that aimed to
9 It doesn't aim to replace the LRU-list based page_granularity reclamation, but
15 On general memory over-committed systems, proactively reclaiming cold pages
20 Free Pages Reporting [3]_ based memory over-commit virtualization systems are
24 guests could be not so memory-frugal, mainly because some kernel subsystems and
25 user-space applications are designed to use as much memory as available. Then,
54 -------
60 no real monitoring and reclamation due to the watermarks-based activation
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| H A D | lru_sort.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based LRU-lists Sorting
7 DAMON-based LRU-lists Sorting (DAMON_LRU_SORT) is a static kernel module that
9 (de)prioritization of pages on their LRU-lists for making LRU-lists a more
12 Where Proactive LRU-lists Sorting is Required?
15 As page-granularity access checking overhead could be significant on huge
23 Because DAMON can identify access patterns of best-effort accuracy while
24 inducing only user-specified range of overhead, proactively running
32 rates that higher than a user-specified threshold) and cold pages (pages of
34 user-specified threshold) using DAMON, and prioritizes hot pages while
[all …]
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| /linux/sound/soc/ti/ |
| H A D | omap-dmic.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * omap-dmic.c -- OMAP ASoC DMIC DAI driver
5 * Copyright (C) 2010 - 2011 Texas Instruments
30 #include "omap-dmic.h"
31 #include "sdma-pcm.h"
53 writel_relaxed(val, dmic->io_base + reg); in omap_dmic_write()
58 return readl_relaxed(dmic->io_base + reg); in omap_dmic_read()
69 omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG, ctrl | dmic->ch_enabled); in omap_dmic_start()
96 mutex_lock(&dmic->mutex); in omap_dmic_dai_startup()
99 dmic->active = 1; in omap_dmic_dai_startup()
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| /linux/drivers/gpu/drm/i915/ |
| H A D | i915_perf.c | 2 * Copyright © 2015-2016 Intel Corporation
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
112 * as a way to forward device-specific status records.
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| H A D | i915_pmu.c | 2 * SPDX-License-Identifier: MIT
4 * Copyright © 2017-2018 Intel Corporation
22 /* Frequency for the sampling timer for events which need it. */
33 return container_of(event->pmu, struct i915_pmu, base); in event_to_pmu()
48 return engine_config_sample(event->attr.config); in engine_event_sample()
53 return (event->attr.config >> I915_PMU_CLASS_SHIFT) & 0xff; in engine_event_class()
58 return (event->attr.config >> I915_PMU_SAMPLE_BITS) & 0xff; in engine_event_instance()
92 * Events that do not require sampling, or tracking state in other_bit()
95 return -1; in other_bit()
118 enable)) - 1); in config_mask()
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| /linux/tools/perf/Documentation/ |
| H A D | perf-record.txt | 1 perf-record(1)
5 ----
6 perf-record - Run a command and record its profile into perf.data
9 --------
11 'perf record' [-e <EVENT> | --event=EVENT] [-a] <command>
12 'perf record' [-e <EVENT> | --event=EVENT] [-a] \-- <command> [<options>]
15 -----------
17 from it, into perf.data - without displaying anything.
23 -------
27 -e::
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| /linux/drivers/mmc/host/ |
| H A D | sdhci-xenon-phy.c | 1 // SPDX-License-Identifier: GPL-2.0-only
8 * Date: 2016-8-24
17 #include "sdhci-pltfm.h"
18 #include "sdhci-xenon.h"
195 /* Nr of consecutive Sampling Points of a Valid Sampling Window */
209 params = devm_kzalloc(mmc_dev(host->mmc), sizeof(*params), GFP_KERNEL); in xenon_alloc_emmc_phy()
211 return -ENOMEM; in xenon_alloc_emmc_phy()
213 priv->phy_params = params; in xenon_alloc_emmc_phy()
214 if (priv->phy_type == EMMC_5_0_PHY) in xenon_alloc_emmc_phy()
215 priv->emmc_phy_regs = &xenon_emmc_5_0_phy_regs; in xenon_alloc_emmc_phy()
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| /linux/drivers/watchdog/ |
| H A D | riowd.c | 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* riowd.c - driver for hw watchdog inside Super I/O of RIO
28 * trigger a power-on reset when the signal is asserted. The BBC
32 * 0x05 (WDTO_INDEX) which is the watchdog time-out in minutes (1-255).
35 * re-set the watchdog else it will trigger.
39 * the watchdog control and can be used to make the watchdog timer re-set
41 * index 0x07 is merely a sampling of the line from the watchdog to the
71 spin_lock_irqsave(&p->lock, flags); in riowd_writereg()
72 writeb(index, p->regs + 0); in riowd_writereg()
73 writeb(val, p->regs + 1); in riowd_writereg()
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| /linux/kernel/sched/ |
| H A D | psi.c | 1 // SPDX-License-Identifier: GPL-2.0
34 * In the FULL state of a given resource, all non-idle tasks are
44 * CPU, productive means an on-CPU task.
48 * FULL means all non-idle tasks in the cgroup are delayed on the CPU
64 * unrealized due to resource contention *also* scales with non-idle
83 * we have to base our calculation on the number of non-idle tasks in
91 * FULL = (threads - min(nr_productive_tasks, threads)) / threads
97 * FULL = (256 - min(256, 256)) / 256 = 0%
99 * For the 1 out of 4 memory-delayed tasks, this yields:
103 * FULL = (4 - min(3, 4)) / 4 = 25%
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| /linux/drivers/platform/x86/ |
| H A D | winmate-fm07-keys.c | 1 // SPDX-License-Identifier: GPL-2.0
3 // Driver for the Winmate FM07 front-panel keys
15 #define DRV_NAME "winmate-fm07keys"
26 /* Typically we're done in fewer than 10 iterations */
72 dev_warn_ratelimited(&input->dev, "timeout polling IO memory\n"); in fm07keys_poll()
77 struct device *dev = &pdev->dev; in fm07keys_probe()
85 return -ENOMEM; in fm07keys_probe()
89 return -EBUSY; in fm07keys_probe()
91 return -EBUSY; in fm07keys_probe()
93 input->name = "Winmate FM07 front-panel keys"; in fm07keys_probe()
[all …]
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| /linux/include/uapi/linux/can/ |
| H A D | netlink.h | 1 /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
25 * CAN bit-timing parameters
32 __u32 bitrate; /* Bit-rate in bits/second */
33 __u32 sample_point; /* Sample point in one-tenth of a percent */
39 __u32 brp; /* Bit-rate prescaler */
43 * CAN hardware-dependent bit-timing constant
45 * Used for calculating and checking bit-timing parameters
54 __u32 brp_min; /* Bit-rate prescaler */
96 #define CAN_CTRLMODE_LISTENONLY 0x02 /* Listen-only mode */
97 #define CAN_CTRLMODE_3_SAMPLES 0x04 /* Triple sampling mode */
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| /linux/drivers/media/dvb-frontends/ |
| H A D | lgdt3306a.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Support for LGDT3306A - 8VSB/QAM-B
6 * - driver structure based on lgdt3305.[ch] by Michael Krufky
7 * - code based on LG3306_V0.35 API by LG Electronics Inc.
17 #include <linux/i2c-mux.h>
22 MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");
37 #define DBG_DUMP 4 /* FGR - comment out to remove dump code */
80 * 0000 -> 00FF Common control and status
81 * 1000 -> 10FF Synchronizer control and status
82 * 1F00 -> 1FFF Smart Antenna control and status
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| /linux/kernel/trace/ |
| H A D | trace_osnoise.c | 1 // SPDX-License-Identifier: GPL-2.0
7 * Copyright (C) 2008-2009 Jon Masters, Red Hat, Inc. <jcm@redhat.com>
8 * Copyright (C) 2013-2016 Steven Rostedt, Red Hat, Inc. <srostedt@redhat.com>
12 * DE OLIVEIRA, Daniel Bristot, et al. Demystifying the real-time linux
13 * scheduling latency. In: 32nd Euromicro Conference on Real-Time Systems
14 * (ECRTS 2020). Schloss Dagstuhl-Leibniz-Zentrum fur Informatik, 2020.
91 * osnoise_instance_registered - check if a tr is already registered
100 if (inst->tr == tr) in osnoise_instance_registered()
109 * osnoise_register_instance - register a new trace instance
126 return -ENOMEM; in osnoise_register_instance()
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| /linux/drivers/iio/adc/ |
| H A D | pac1934.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * IIO driver for PAC1934 Multi-Channel DC Power/Energy Monitor
5 * Copyright (C) 2017-2024 Microchip Technology Inc. and its subsidiaries
12 …oads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/PAC1931-Family-Data-Sheet-DS20005850E.…
46 * (2^31 - 1) * 10^8 + 99999999
51 * -(2^31) * 10^8 - 99999999
53 #define PAC_193X_MIN_POWER_ACC -214748364899999999LL
118 * relative offsets when using multi-byte reads/writes even though these
147 /* Scale constant = (10^3 * 3.2 * 10^9 / 2^28) for mili Watt-second */
187 * 033771E0-1705-47B4-9535-D1BBE14D9A09,
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