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/linux/Documentation/networking/devlink/
H A Ddevlink-reload.rst1 .. SPDX-License-Identifier: GPL-2.0
7 ``devlink-reload`` provides mechanism to reinit driver entities, applying
8 ``devlink-params`` and ``devlink-resources`` new values. It also provides
17 .. list-table:: Possible reload actions
20 * - Name
21 - Description
22 * - ``driver-reinit``
23 - Devlink driver entities re-initialization, including applying
27 * ``devlink-params`` in configuration mode ``driverinit``
28 * ``devlink-resources``
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/linux/drivers/gpu/drm/xe/
H A Dxe_validation.h1 /* SPDX-License-Identifier: MIT */
8 #include <linux/dma-resv.h>
19 * xe_validation_lockdep() - Assert that a drm_exec locking transaction can
45 * XE_VALIDATION_UNSUPPORTED is for dma-buf code only where
46 * the dma-buf layer doesn't support WW locking.
51 #define __XE_VAL_UNIMPLEMENTED -EINVAL
55 #define __XE_VAL_UNSUPPORTED -EOPNOTSUPP
58 #define __XE_VAL_OPT_OUT -ENOMEM
72 * struct xe_validation_device - The domain for exhaustive eviction
84 * struct xe_val_flags - Flags for xe_validation_ctx_init().
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/linux/drivers/net/ipa/
H A Dipa_main.c1 // SPDX-License-Identifier: GPL-2.0
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2018-2024 Linaro Ltd.
51 * currently supported. Despite that, some resources--including routing
52 * tables and filter tables--are defined in this driver because they must
58 * well-defined communication layer between the AP subsystem and the IPA
101 * ipa_setup() - Set up IPA hardware
104 * Perform initialization that requires issuing immediate commands on
106 * and initialization, this function will be called when an SMP2P
115 struct device *dev = ipa->dev; in ipa_setup()
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/linux/drivers/net/wireless/intel/iwlegacy/
H A Dprph.h8 * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
106 * processor is sleeping (e.g. for periodic power-saving shutdowns of radio).
119 * The uCode used for open-source drivers includes two programs:
121 * 1) Initialization -- performs hardware calibration and sets up some
125 * The initialization program must be used when initially setting up the
128 * 2) Runtime/Protocol -- performs all normal runtime operations. This
157 * The bootstrap uCode (already in instruction SRAM) loads initialization
158 * uCode. Initialization uCode performs data initialization, sends
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/linux/drivers/platform/surface/
H A Dsurface_aggregator_hub.c1 // SPDX-License-Identifier: GPL-2.0+
7 * (hot-)removal.
9 * Copyright (C) 2020-2022 Maximilian Luz <luzmaximilian@gmail.com>
21 /* -- SSAM generic subsystem hub driver framework. -------------------------- */
24 SSAM_HUB_UNINITIALIZED, /* Only set during initialization. */
73 status = hub->ops.get_state(hub, &state); in ssam_hub_update_workfn()
78 * There is a small possibility that hub devices were hot-removed and in ssam_hub_update_workfn()
79 * re-added before we were able to remove them here. In that case, both in ssam_hub_update_workfn()
82 * leave child devices without proper (re-)initialization and the in ssam_hub_update_workfn()
83 * hot-remove flag set. in ssam_hub_update_workfn()
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/linux/drivers/net/wwan/t7xx/
H A Dt7xx_modem_ops.h1 /* SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (c) 2021-2022, Intel Corporation.
31 * enum hif_ex_stage - HIF exception handshake stages with the HW.
33 * @HIF_EX_INIT_DONE: Polling for initialization to be done.
35 * @HIF_EX_ALLQ_RESET: HW is back in safe mode for re-initialization and restart.
/linux/drivers/clocksource/
H A Dhyperv_timer.c1 // SPDX-License-Identifier: GPL-2.0
5 * provided by the Hyper-V hypervisor to guest VMs, as described
6 * in the Hyper-V Top Level Functional Spec (TLFS). This driver
35 * If false, we're using the old mechanism for stimer0 interrupts
37 * mechanism is used when running on older versions of Hyper-V
38 * that don't support Direct Mode. While Hyper-V provides
45 * However, for legacy versions of Hyper-V when Direct Mode
52 static int stimer0_irq = -1;
65 ce->event_handler(ce); in hv_stimer0_isr()
71 * per-cpu interrupts, which also implies Direct Mode.
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/linux/fs/btrfs/
H A Dlocking.h1 /* SPDX-License-Identifier: GPL-2.0 */
71 * has this problem as it appears we're locking the same block again
79 * the limit. As of this writing we're limited to 8, and we're
106 rwsem_acquire(&owner->lock##_map, 0, 0, _THIS_IP_); \
107 rwsem_release(&owner->lock##_map, _THIS_IP_); \
122 rwsem_acquire_read(&owner->lock##_map, 0, 0, _THIS_IP_)
129 rwsem_release(&owner->lock##_map, _THIS_IP_)
136 rwsem_acquire_read(&owner->vfs_inode.lock.dep_map, 0, 0, _THIS_IP_)
139 rwsem_release(&owner->vfs_inode.lock.dep_map, _THIS_IP_)
147 rwsem_acquire(&owner->btrfs_state_change_map[i], 0, 0, _THIS_IP_); \
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/linux/lib/zstd/compress/
H A Dzstd_cwksp.h1 /* 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.
15 /*-*************************************
23 /*-*************************************
42 /*-*************************************
55 * expect a well-formed caller to free this.
71 * - These different internal datastructures have different setup requirements:
73 * - The static objects need to be cleared once and can then be trivially
76 * - Various buffers don't need to be initialized at all--they are always
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/linux/Documentation/scheduler/
H A Dcompletion.rst2 Completions - "wait for completion" barrier APIs
6 -------------
10 race-free solution to this problem. Semantically they are somewhat like a
11 pthread_barrier() and have similar use-cases.
14 misuse of locks/semaphores and busy-loops. Any time you think of using
34 ------
38 - the initialization of the 'struct completion' synchronization object
39 - the waiting part through a call to one of the variants of wait_for_completion(),
40 - the signaling side through a call to complete() or complete_all().
43 Note that while initialization must happen first, the waiting and signaling
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/linux/Documentation/PCI/
H A Dpci-error-recovery.rst1 .. SPDX-License-Identifier: GPL-2.0
8 :Authors: - Linas Vepstas <linasvepstas@gmail.com>
9 - Richard Lary <rlary@us.ibm.com>
10 - Mike Mason <mmlnx@us.ibm.com>
17 and the PCI-host bridges found on IBM Power4, Power5 and Power6-based
32 including multiple instances of a device driver on multi-function
34 waiting for some i/o-space register to change, when it never will.
39 is forced by the need to handle multi-function devices, that is,
42 of reset it desires, the choices being a simple re-enabling of I/O
47 After a reset and/or a re-enabling of I/O, all drivers are
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/linux/drivers/pcmcia/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
9 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
10 computer. These are credit-card size devices such as network cards,
21 tristate "16-bit PCMCIA support"
26 This option enables support for 16-bit PCMCIA cards. Most older
27 PC-cards are such 16-bit PCMCIA cards, so unless you know you're
28 only using 32-bit CardBus cards, say Y or M here.
30 To use 16-bit PCMCIA cards, you will need supporting software in
48 automatically using the in-kernel firmware loader and the hotplug
49 subsystem, instead of relying on cardmgr from pcmcia-cs to do so.
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/linux/sound/hda/common/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
13 bool "Build hwdep interface for HD-audio driver"
16 Say Y here to build a hwdep interface for HD-audio driver.
17 This interface can be used for out-of-band communication
23 Say Y here to enable the HD-audio codec re-configuration feature.
25 codec setup, add extra verbs, and re-configure the codec dynamically.
36 Say Y here to build a digital beep interface for HD-audio
45 Set 0 to disable the digital beep interface for HD-audio by default.
46 Set 1 to always enable the digital beep interface for HD-audio by
50 bool "Support initialization patch loading for HD-audio"
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/linux/include/sound/
H A Dcs4271.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
16 * line is de-asserted. That also means that clocks cannot be changed
18 * a complete re-initialization of all registers.
20 * One (undocumented) workaround is to assert and de-assert the PDN bit
/linux/drivers/firewire/
H A Dinit_ohci1394_dma.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * init_ohci1394_dma.c - Initializes physical DMA on all OHCI 1394 controllers
5 * Copyright (C) 2006-2007 Bernhard Kaindl <bk@suse.de>
7 * Derived from drivers/ieee1394/ohci1394.c and arch/x86/kernel/early-quirks.c
9 * - scan the PCI very early on boot for all OHCI 1394-compliant controllers
10 * - reset and initialize them and make them join the IEEE1394 bus and
11 * - enable physical DMA on them to allow remote debugging
17 * To use physical DMA after the initialization of the firewire stack,
18 * be sure that the stack enables it and (re-)attach after the bus reset
19 * which may be caused by the firewire stack initialization.
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/linux/include/linux/
H A Drculist_nulls.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 * RCU-protected list version
14 * hlist_nulls_del_init_rcu - deletes entry from hash list with re-initialization
28 * list-mutation primitive, such as hlist_nulls_add_head_rcu() or
30 * perfectly legal to run concurrently with the _rcu list-traversal
37 WRITE_ONCE(n->pprev, NULL); in hlist_nulls_del_init_rcu()
42 * hlist_nulls_first_rcu - returns the first element of the hash list.
46 (*((struct hlist_nulls_node __rcu __force **)&(head)->first))
49 * hlist_nulls_next_rcu - returns the element of the list after @node.
53 (*((struct hlist_nulls_node __rcu __force **)&(node)->next))
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H A Drculist_bl.h1 /* SPDX-License-Identifier: GPL-2.0 */
6 * RCU-protected bl list version. See include/linux/list_bl.h.
15 LIST_BL_BUG_ON(((unsigned long)h->first & LIST_BL_LOCKMASK) != in hlist_bl_set_first_rcu()
17 rcu_assign_pointer(h->first, in hlist_bl_set_first_rcu()
24 ((unsigned long)rcu_dereference_check(h->first, hlist_bl_is_locked(h)) & ~LIST_BL_LOCKMASK); in hlist_bl_first_rcu()
28 * hlist_bl_del_rcu - deletes entry from hash list without re-initialization
40 * with another list-mutation primitive, such as hlist_bl_add_head_rcu()
43 * the _rcu list-traversal primitives, such as
49 n->pprev = LIST_POISON2; in hlist_bl_del_rcu()
63 * with another list-mutation primitive, such as hlist_bl_add_head_rcu()
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/linux/drivers/atm/
H A Dnicstarmac.copyright6 * 10/1/97 - commented out CFG_PHYIE bit - we don't care when the PHY
8 * 10/4/97 - began heavy inline documentation of the code. Corrected typos
10 * 10/5/97 - added code to handle PHY interrupts, disable PHY on
11 * loss of link, and correctly re-enable PHY when link is
12 * re-established. (put back CFG_PHYIE)
14 * Modified to work with the IDT7721 nicstar -- AAL5 (tested) only.
19 * PHY component is expected to be 155 Mbps S/UNI-Lite or IDT 77155;
20 * see init_nicstar() for PHY initialization to change this. This driver
21 * expects the Linux ATM stack to support scatter-gather lists
22 * (skb->atm.iovcnt != 0) for Rx skb's passed to vcc->push.
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/linux/Documentation/driver-api/surface_aggregator/
H A Dinternal.rst1 .. SPDX-License-Identifier: GPL-2.0+
54 internal-api
63 Lower-level packet transport is implemented in the *packet transport layer
68 packet payloads to higher-level layers.
71 around command-type packet payloads, i.e. requests (sent from host to EC),
90 Refer to Documentation/driver-api/surface_aggregator/client.rst for
93 that chapter and the Documentation/driver-api/surface_aggregator/ssh.rst
104 -------
153 ------------
163 re-submitted to this queue due to timeouts or NAK packets sent by the EC.
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/linux/mm/kfence/
H A Dcore.c1 // SPDX-License-Identifier: GPL-2.0
16 #include <linux/kcsan-checks.h>
78 *((unsigned long *)kp->arg) = num; in param_set_sample_interval()
81 return disabled_by_warn ? -EINVAL : kfence_enable_late(); in param_set_sample_interval()
120 * Per-object metadata, with one-to-one mapping of object metadata to
129 * kfence_metadata visible after initialization is successful. This prevents
151 * Assuming a range of 15%-85% unique allocations in the pool at any point in
152 * time, the below parameters provide a probablity of 0.02-0.33 for false
155 * P(alloc_traces) = (1 - e^(-HNUM * (alloc_traces / SIZE)) ^ HNUM
161 #define ALLOC_COVERED_MASK (ALLOC_COVERED_SIZE - 1)
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/linux/drivers/media/usb/pvrusb2/
H A Dpvrusb2-hdw.h1 /* SPDX-License-Identifier: GPL-2.0-only */
11 #include <media/v4l2-dev.h>
12 #include "pvrusb2-io.h"
13 #include "pvrusb2-ctrl.h"
17 pvr2_hdw_get_ctrl_by_id() - these are NOT visible in V4L */
61 * DEAD - Device is in an unusable state and cannot be recovered. This
66 * COLD - Device is in an unusable state, needs microcontroller firmware.
68 * WARM - We can communicate with the device and the proper
69 * microcontroller firmware is running, but other device initialization is
72 * ERROR - A problem prevents capture operation (e.g. encoder firmware
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/linux/lib/
H A Dratelimit.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * ratelimit.c - Do something with rate limit.
7 * 2008-05-01 rewrite the function and use a ratelimit_state data struct as
16 * __ratelimit - rate limiting
20 * This enforces a rate limit: not more than @rs->burst callbacks
21 * in every @rs->interval
33 int interval = READ_ONCE(rs->interval); in ___ratelimit()
34 int burst = READ_ONCE(rs->burst); in ___ratelimit()
39 * Zero interval says never limit, otherwise, non-positive burst in ___ratelimit()
45 if (!(READ_ONCE(rs->flags) & RATELIMIT_INITIALIZED) || (!interval && !burst) || in ___ratelimit()
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/linux/drivers/gpu/drm/i915/gt/uc/
H A Dintel_uc.c1 // SPDX-License-Identifier: MIT
3 * Copyright © 2016-2019 Intel Corporation
28 struct drm_i915_private *i915 = uc_to_gt(uc)->i915; in uc_expand_default_options()
30 if (i915->params.enable_guc != -1) in uc_expand_default_options()
33 /* Don't enable GuC/HuC on pre-Gen12 */ in uc_expand_default_options()
35 i915->params.enable_guc = 0; in uc_expand_default_options()
41 i915->params.enable_guc = 0; in uc_expand_default_options()
47 i915->params.enable_guc = ENABLE_GUC_LOAD_HUC; in uc_expand_default_options()
52 i915->params.enable_guc = ENABLE_GUC_LOAD_HUC | ENABLE_GUC_SUBMISSION; in uc_expand_default_options()
63 ret = i915_inject_probe_error(gt->i915, -ENXIO); in __intel_uc_reset_hw()
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/linux/drivers/infiniband/hw/hfi1/
H A Dinit.c1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
3 * Copyright(c) 2015 - 2020 Intel Corporation.
50 int num_user_contexts = -1;
53 …num_user_contexts, "Set max number of user contexts to use (default: -1 will use the real (non-HT)…
58 MODULE_PARM_DESC(krcvqs, "Array of the number of non-control kernel receive queues by VL");
77 MODULE_PARM_DESC(hdrq_entsize, "Size of header queue entries: 2 - 8B, 16 - 64B, 32 - 128B (default)…
94 ret = hfi1_create_ctxtdata(ppd, dd->node, &rcd); in hfi1_create_kctxt()
105 rcd->flags = HFI1_CAP_KGET(MULTI_PKT_EGR) | in hfi1_create_kctxt()
111 if (rcd->ctxt == HFI1_CTRL_CTXT) in hfi1_create_kctxt()
112 rcd->flags |= HFI1_CAP_DMA_RTAIL; in hfi1_create_kctxt()
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/linux/Documentation/sound/cards/
H A Daudiophile-usb.rst2 Guide to using M-Audio Audiophile USB with ALSA and Jack
9 This document is a guide to using the M-Audio Audiophile USB (tm) device with
15 * v1.4 - Thibault Le Meur (2007-07-11)
17 - Added Low Endianness nature of 16bits-modes
19 - Modifying document structure
21 * v1.5 - Thibault Le Meur (2007-07-12)
22 - Added AC3/DTS passthru info
35 - This port supports 2 pairs of line-level audio inputs (1/4" TS and RCA)
36 - When the 1/4" TS (jack) connectors are connected, the RCA connectors
57 * 16-bit/48kHz ==> 4 channels in + 4 channels out
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