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/linux-5.10/Documentation/admin-guide/cgroup-v1/
Dblkio-controller.rst16 level logical devices like device mapper.
21 -----------------------------
22 - Enable Block IO controller::
26 - Enable throttling in block layer::
30 - Mount blkio controller (see cgroups.txt, Why are cgroups needed?)::
32 mount -t cgroup -o blkio none /sys/fs/cgroup/blkio
34 - Specify a bandwidth rate on particular device for root group. The format
40 on device having major/minor number 8:16.
42 - Run dd to read a file and see if rate is throttled to 1MB/s or not::
83 - Block IO controller.
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Drdma.rst8 1-1. What is RDMA controller?
9 1-2. Why RDMA controller needed?
10 1-3. How is RDMA controller implemented?
16 1-1. What is RDMA controller?
17 -----------------------------
25 1-2. Why RDMA controller needed?
26 --------------------------------
37 1-3. How is RDMA controller implemented?
38 ----------------------------------------
41 resource accounting per cgroup, per device using resource pool structure.
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/linux-5.10/include/linux/mtd/
Dnand.h1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright 2017 - Free Electrons
6 * Boris Brezillon <boris.brezillon@free-electrons.com>
18 * struct nand_memory_organization - Memory organization structure
19 * @bits_per_cell: number of bits per NAND cell
22 * @pages_per_eraseblock: number of pages per eraseblock
23 * @eraseblocks_per_lun: number of eraseblocks per LUN (Logical Unit Number)
24 * @max_bad_eraseblocks_per_lun: maximum number of eraseblocks per LUN
25 * @planes_per_lun: number of planes per LUN
26 * @luns_per_target: number of LUN per target (target is a synonym for die)
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/linux-5.10/Documentation/timers/
Dhighres.rst8 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
11 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
23 - hrtimer base infrastructure
24 - timeofday and clock source management
25 - clock event management
26 - high resolution timer functionality
27 - dynamic ticks
31 ---------------------------
40 - time ordered enqueueing into a rb-tree
41 - independent of ticks (the processing is based on nanoseconds)
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/linux-5.10/include/drm/
Di915_mei_hdcp_interface.h1 /* SPDX-License-Identifier: (GPL-2.0+) */
3 * Copyright © 2017-2019 Intel Corporation
13 #include <linux/device.h>
17 * enum hdcp_port_type - HDCP port implementation type defined by ME FW
19 * @HDCP_PORT_TYPE_INTEGRATED: In-Host HDCP2.x port
33 * enum hdcp_wired_protocol - HDCP adaptation used on the port
57 * enum mei_fw_tc - ME Firmware defined index for transcoders
79 * struct hdcp_port_data - intel specific HDCP port data
80 * @fw_ddi: ddi index as per ME FW
81 * @fw_tc: transcoder index as per ME FW
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Ddrm_device.h30 * enum drm_switch_power - power state of drm device
48 * struct drm_device - DRM device structure
57 * List of devices per driver for stealth attach cleanup
64 /** @ref: Object ref-count */
67 /** @dev: Device structure of bus-device */
68 struct device *dev;
85 /** @driver: DRM driver managing the device */
96 * per-device structure.
116 * Currently active master for this device.
122 * @driver_features: per-device driver features
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/linux-5.10/drivers/scsi/aic7xxx/
DKconfig.aic79xx1 # SPDX-License-Identifier: GPL-2.0-only
4 # $Id: //depot/linux-aic79xx-2.5.0/drivers/scsi/aic7xxx/Kconfig.aic79xx#4 $
11 This driver supports all of Adaptec's Ultra 320 PCI-X
15 int "Maximum number of TCQ commands per device"
19 Specify the number of commands you would like to allocate per SCSI
20 device when Tagged Command Queueing (TCQ) is enabled on that device.
23 to be used for any device. The aic7xxx driver will automatically
24 vary this number based on device behavior. For devices with a
28 Due to resource allocation issues in the Linux SCSI mid-layer, using
29 a high number of commands per device may result in memory allocation
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DKconfig.aic7xxx1 # SPDX-License-Identifier: GPL-2.0-only
4 # $Id: //depot/linux-aic79xx-2.5.0/drivers/scsi/aic7xxx/Kconfig.aic7xxx#7 $
7 tristate "Adaptec AIC7xxx Fast -> U160 support"
20 int "Maximum number of TCQ commands per device"
24 Specify the number of commands you would like to allocate per SCSI
25 device when Tagged Command Queueing (TCQ) is enabled on that device.
28 to be used for any device. The aic7xxx driver will automatically
29 vary this number based on device behavior. For devices with a
33 Due to resource allocation issues in the Linux SCSI mid-layer, using
34 a high number of commands per device may result in memory allocation
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/linux-5.10/Documentation/devicetree/bindings/remoteproc/
Dti,keystone-rproc.txt5 sub-systems that are used to offload some of the processor-intensive tasks or
8 These processor sub-systems usually contain additional sub-modules like L1
13 DSP Device Node:
15 Each DSP Core sub-system is represented as a single DT node, and should also
18 CorePac) to perform the device management of the remote processor and to
22 --------------------
25 - compatible: Should be one of the following,
26 "ti,k2hk-dsp" for DSPs on Keystone 2 66AK2H/K SoCs
27 "ti,k2l-dsp" for DSPs on Keystone 2 66AK2L SoCs
28 "ti,k2e-dsp" for DSPs on Keystone 2 66AK2E SoCs
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/linux-5.10/drivers/media/platform/mtk-mdp/
Dmtk_mdp_core.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2015-2016 MediaTek Inc.
12 #include <media/v4l2-ctrls.h>
13 #include <media/v4l2-device.h>
14 #include <media/v4l2-mem2mem.h>
15 #include <media/videobuf2-core.h>
16 #include <media/videobuf2-dma-contig.h>
22 #define MTK_MDP_MODULE_NAME "mtk-mdp"
34 * struct mtk_mdp_pix_align - alignment of image
48 * struct mtk_mdp_fmt - the driver's internal color format data
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/linux-5.10/drivers/misc/
Dhpilo.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
13 /* max number of open channel control blocks per device, hw limited to 32 */
15 /* min number of open channel control blocks per device, hw limited to 32 */
23 /* per spin wait time in usec */
29 * Per device, used to track global memory allocations.
32 /* mmio registers on device */
35 /* doorbell registers on device */
38 /* shared memory on device used for channel control blocks */
41 /* files corresponding to this device */
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/linux-5.10/Documentation/usb/
Ddwc3.rst11 - Convert interrupt handler to per-ep-thread-irq
13 As it turns out some DWC3-commands ~1ms to complete. Currently we spin
18 - dwc core implements a demultiplexing irq chip for interrupts per
20 to the device. If MSI provides per-endpoint interrupt this dummy
22 - interrupts are requested / allocated on usb_ep_enable() and removed on
25 - dwc3_send_gadget_ep_cmd() will sleep in wait_for_completion_timeout()
27 - the interrupt handler is split into the following pieces:
29 - primary handler of the device
34 - threaded handler of the device
37 - primary handler of the EP-interrupt
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Dauthorization.rst5 Copyright (C) 2007 Inaky Perez-Gonzalez <inaky@linux.intel.com> Intel Corporation
7 This feature allows you to control if a USB device can be used (or
8 not) in a system. This feature will allow you to implement a lock-down
11 As of now, when a USB device is connected it is configured and
13 modification, only if root authorizes the device to be configured will
19 Authorize a device to connect::
21 $ echo 1 > /sys/bus/usb/devices/DEVICE/authorized
23 De-authorize a device::
25 $ echo 0 > /sys/bus/usb/devices/DEVICE/authorized
45 ------------------------------
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/linux-5.10/Documentation/devicetree/bindings/c6x/
Ddscr.txt1 Device State Configuration Registers
2 ------------------------------------
8 In general, the Device State Configuration Registers (DSCR) will provide one or
14 write once or the individual bits are write once. In addition to device config,
16 provide device ID information, provide ethernet MAC addresses, as well as other
19 For device state control (enable/disable), each device control is assigned an
20 id which is used by individual device drivers to control the state as needed.
24 - compatible: must be "ti,c64x+dscr"
25 - reg: register area base and size
31 device tree will result in reduced functionality or possibly driver
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/linux-5.10/kernel/cgroup/
Drdma.c1 // SPDX-License-Identifier: GPL-2.0-only
21 * Protects list of resource pools maintained on per cgroup basis
22 * and rdma device list.
49 * resource pool object which represents per cgroup, per device
50 * resources. There are multiple instances of this object per cgroup,
55 struct rdmacg_device *device; member
74 return css_rdmacg(cg->css.parent); in parent_rdmacg()
86 if (rpool->resources[index].max != S32_MAX) in set_resource_limit()
87 rpool->num_max_cnt++; in set_resource_limit()
89 if (rpool->resources[index].max == S32_MAX) in set_resource_limit()
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/linux-5.10/drivers/gpu/drm/arm/display/komeda/
Dkomeda_dev.h1 /* SPDX-License-Identifier: GPL-2.0 */
10 #include <linux/device.h>
93 * initialize &komeda_dev->format_table, this function should be called
103 /** @cleanup: call to chip to cleanup komeda_dev->chip data */
139 * passed to CHIP by &komeda_dev_funcs->change_opmode(), then CHIP can do the
141 * - KOMEDA_MODE_DISP0: Only one display enabled, pipeline-0 work as master.
142 * - KOMEDA_MODE_DISP1: Only one display enabled, pipeline-0 work as master.
143 * - KOMEDA_MODE_DUAL_DISP: Dual display mode, both display has been enabled.
158 * komeda_device is for describing the whole view of the device, and the
159 * control-abilites of device.
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/linux-5.10/drivers/scsi/mpt3sas/
Dmpt3sas_scsih.c5 * Copyright (C) 2012-2014 LSI Corporation
6 * Copyright (C) 2013-2014 Avago Technologies
7 * (mailto: MPT-FusionLinux.pdl@avagotech.com)
22 * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
41 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
93 static u8 scsi_io_cb_idx = -1;
94 static u8 tm_cb_idx = -1;
95 static u8 ctl_cb_idx = -1;
96 static u8 base_cb_idx = -1;
97 static u8 port_enable_cb_idx = -1;
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/linux-5.10/drivers/infiniband/hw/qib/
Dqib_sysfs.c3 * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
16 * - Redistributions of source code must retain the above
20 * - Redistributions in binary form must reproduce the above
39 /* start of per-port functions */
45 struct qib_devdata *dd = ppd->dd; in show_hrtbt_enb()
48 ret = dd->f_get_ib_cfg(ppd, QIB_IB_CFG_HRTBT); in show_hrtbt_enb()
56 struct qib_devdata *dd = ppd->dd; in store_hrtbt_enb()
67 * Set the "intentional" heartbeat enable per either of in store_hrtbt_enb()
73 ret = dd->f_set_ib_cfg(ppd, QIB_IB_CFG_HRTBT, val); in store_hrtbt_enb()
80 struct qib_devdata *dd = ppd->dd; in store_loopback()
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/linux-5.10/drivers/net/ethernet/neterion/vxge/
Dvxge-config.h10 * vxge-config.h: Driver for Exar Corp's X3100 Series 10GbE PCIe I/O
12 * Copyright(c) 2002-2010 Exar Corp.
27 (((size) - (((u64)adrs) & ((size)-1))) & ((size)-1))
46 * @test: C-condition to check
145 VXGE_HW_EOF_TRACE_BUF = -1
149 * enum enum vxge_hw_device_link_state - Link state enumeration.
162 * enum enum vxge_hw_fw_upgrade_code - FW upgrade return codes.
177 * enum enum vxge_hw_fw_upgrade_err_code - FW upgrade error codes.
203 * struct vxge_hw_device_date - Date Format
228 * struct vxge_hw_fifo_config - Configuration of fifo.
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/linux-5.10/Documentation/driver-api/
Dmtdnand.rst10 The generic NAND driver supports almost all NAND and AG-AND based chips
31 --------------------------
37 - [MTD Interface]
43 - [NAND Interface]
48 - [GENERIC]
53 - [DEFAULT]
65 -------------------------------
71 - [INTERN]
77 - [REPLACEABLE]
86 - [BOARDSPECIFIC]
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/linux-5.10/Documentation/hwmon/
Dg762.rst5 and performs closed-loop or open-loop control of the fan speed. Two
6 modes - PWM or DC - are supported by the device.
9 http://natisbad.org/NAS/ref/GMT_EDS-762_763-080710-0.2.pdf. sysfs
10 bindings are described in Documentation/hwmon/sysfs-interface.rst.
13 /sys/bus/i2c/drivers/g762/ to control the operation of the device.
18 hardware characteristics of the system (reference clock, pulses per
25 set desired fan speed. This only makes sense in closed-loop
30 the fan to the device.
36 number of pulses per fan revolution. Supported values
44 in closed-loop control mode, if fan RPM value is 25% out
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/linux-5.10/Documentation/power/
Dpm_qos_interface.rst11 * The per-device PM QoS framework provides the API to manage the
12 per-device latency constraints and PM QoS flags.
65 The infrastructure exposes one device node, /dev/cpu_dma_latency, for the CPU
75 As long as the device node is held open that process has a registered
79 the open device node. Alternatively, it can write a hex string for the value
83 To remove the user mode request for a target value simply close the device
87 2. PM QoS per-device latency and flags framework
90 For each device, there are three lists of PM QoS requests. Two of them are
98 values. One device PM QoS flag is defined currently: PM_QOS_FLAG_NO_POWER_OFF.
106 int dev_pm_qos_add_request(device, handle, type, value):
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/linux-5.10/include/linux/platform_data/
Ddma-dw.h1 /* SPDX-License-Identifier: GPL-2.0 */
6 * Copyright (C) 2010-2011 ST Microelectronics
19 struct device;
22 * struct dw_dma_slave - Controller-specific information about a slave
24 * @dma_dev: required DMA master device
33 struct device *dma_dev;
43 * struct dw_dma_platform_data - Controller configuration parameters
49 * @data_width: Maximum data width supported by hardware per AHB master
51 * @multi_block: Multi block transfers supported by hardware per channel.
53 * per channel (in units of CTL.SRC_TR_WIDTH/CTL.DST_TR_WIDTH).
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/linux-5.10/drivers/media/platform/am437x/
Dam437x-vpfe.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
12 #include <linux/am437x-vpfe.h>
15 #include <linux/device.h>
20 #include <media/v4l2-dev.h>
21 #include <media/v4l2-device.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/videobuf2-v4l2.h>
24 #include <media/videobuf2-dma-contig.h>
26 #include "am437x-vpfe_regs.h"
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/linux-5.10/kernel/dma/
Dcoherent.c1 // SPDX-License-Identifier: GPL-2.0
3 * Coherent per-device memory handling.
10 #include <linux/dma-direct.h>
11 #include <linux/dma-map-ops.h>
25 static inline struct dma_coherent_mem *dev_get_coherent_memory(struct device *dev) in dev_get_coherent_memory()
27 if (dev && dev->dma_mem) in dev_get_coherent_memory()
28 return dev->dma_mem; in dev_get_coherent_memory()
32 static inline dma_addr_t dma_get_device_base(struct device *dev, in dma_get_device_base()
35 if (mem->use_dev_dma_pfn_offset) in dma_get_device_base()
36 return phys_to_dma(dev, PFN_PHYS(mem->pfn_base)); in dma_get_device_base()
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