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Driver core / Documentation fixes for 5.10-rc2 

Here is one tiny debugfs change to fix up an API where the last user was
 successfully fixed up in 5.10-rc1 (so it couldn't be merged earlier),
 and a much larger Documentation/ABI/ update to the files so they can be
 automatically parsed by our tools.
 
 The Documentation/ABI/ updates are just formatting issues, small ones to
 bring the files into parsable format, and have been acked by numerous
 subsystem maintainers and the documentation maintainer.  I figured it
 was good to get this into 5.10-rc2 to help with the merge issues that
 would arise if these were to stick in linux-next until 5.11-rc1.
 
 The debugfs change has been in linux-next for a long time, and the
 Documentation updates only for the last linux-next release.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core and documentation fixes from Greg KH:
 "Here is one tiny debugfs change to fix up an API where the last user
  was successfully fixed up in 5.10-rc1 (so it couldn't be merged
  earlier), and a much larger Documentation/ABI/ update to the files so
  they can be automatically parsed by our tools.

  The Documentation/ABI/ updates are just formatting issues, small ones
  to bring the files into parsable format, and have been acked by
  numerous subsystem maintainers and the documentation maintainer. I
  figured it was good to get this into 5.10-rc2 to help wih the merge
  issues that would arise if these were to stick in linux-next until
  5.11-rc1.

  The debugfs change has been in linux-next for a long time, and the
  Documentation updates only for the last linux-next release"

* tag 'driver-core-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (40 commits)
  scripts: get_abi.pl: assume ReST format by default
  docs: ABI: sysfs-class-led-trigger-pattern: remove hw_pattern duplication
  docs: ABI: sysfs-class-backlight: unify ABI documentation
  docs: ABI: sysfs-c2port: remove a duplicated entry
  docs: ABI: sysfs-class-power: unify duplicated properties
  docs: ABI: unify /sys/class/leds/<led>/brightness documentation
  docs: ABI: stable: remove a duplicated documentation
  docs: ABI: change read/write attributes
  docs: ABI: cleanup several ABI documents
  docs: ABI: sysfs-bus-nvdimm: use the right format for ABI
  docs: ABI: vdso: use the right format for ABI
  docs: ABI: fix syntax to be parsed using ReST notation
  docs: ABI: convert testing/configfs-acpi to ReST
  docs: Kconfig/Makefile: add a check for broken ABI files
  docs: abi-testing.rst: enable --rst-sources when building docs
  docs: ABI: don't escape ReST-incompatible chars from obsolete and removed
  docs: ABI: create a 2-depth index for ABI
  docs: ABI: make it parse ABI/stable as ReST-compatible files
  docs: ABI: sysfs-uevent: make it compatible with ReST output
  docs: ABI: testing: make the files compatible with ReST output
  ...
This commit is contained in:
Linus Torvalds 2020-11-01 09:59:13 -08:00
parent 2376cca02d 2fcce37a3d
commit 9c75b68b91
250 changed files with 4107 additions and 2466 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Documentation/ABI/README
View File

@ -32,7 +32,7 @@ The different levels of stability are:
layout of the files below for details on how to do this.)
obsolete/
This directory documents interfaces that are still remaining in
This directory documents interfaces that are still remaining in
the kernel, but are marked to be removed at some later point in
time. The description of the interface will document the reason
why it is obsolete and when it can be expected to be removed.
@ -58,6 +58,14 @@ Users: All users of this interface who wish to be notified when
be changed further.
Note:
The fields should be use a simple notation, compatible with ReST markup.
Also, the file **should not** have a top-level index, like::
===
foo
===
How things move between levels:
Interfaces in stable may move to obsolete, as long as the proper

8
Documentation/ABI/obsolete/sysfs-class-dax
View File

@ -8,11 +8,11 @@ Description: Device DAX is the device-centric analogue of Filesystem
system. Device DAX is strict, precise and predictable.
Specifically this interface:
1/ Guarantees fault granularity with respect to a given
page size (pte, pmd, or pud) set at configuration time.
1. Guarantees fault granularity with respect to a given
page size (pte, pmd, or pud) set at configuration time.
2/ Enforces deterministic behavior by being strict about
what fault scenarios are supported.
2. Enforces deterministic behavior by being strict about
what fault scenarios are supported.
The /sys/class/dax/ interface enumerates all the
device-dax instances in the system. The ABI is

3
Documentation/ABI/obsolete/sysfs-driver-hid-roccat-pyra
View File

@ -7,10 +7,13 @@ Description: It is possible to switch the cpi setting of the mouse with the
setting reported by the mouse. This number has to be further
processed to receive the real dpi value:
===== ====
VALUE DPI
===== ====
1 400
2 800
4 1600
===== ====
This file is readonly.
Has never been used. If bookkeeping is done, it's done in userland tools.

2
Documentation/ABI/obsolete/sysfs-gpio
View File

@ -13,6 +13,8 @@ Description:
GPIOs are identified as they are inside the kernel, using integers in
the range 0..INT_MAX. See Documentation/admin-guide/gpio for more information.
::
/sys/class/gpio
/export ... asks the kernel to export a GPIO to userspace
/unexport ... to return a GPIO to the kernel

1
Documentation/ABI/removed/devfs
View File

@ -5,6 +5,7 @@ Description:
devfs has been unmaintained for a number of years, has unfixable
races, contains a naming policy within the kernel that is
against the LSB, and can be replaced by using udev.
The files fs/devfs/*, include/linux/devfs_fs*.h were removed,
along with the assorted devfs function calls throughout the
kernel tree.

1
Documentation/ABI/removed/raw1394
View File

@ -7,6 +7,7 @@ Description:
to implement sensible device security policies, and its low level
of abstraction that required userspace clients to duplicate much
of the kernel's ieee1394 core functionality.
Replaced by /dev/fw*, i.e. the <linux/firewire-cdev.h> ABI of
firewire-core.

2
Documentation/ABI/removed/sysfs-class-rfkill
View File

@ -10,4 +10,4 @@ Description: This file was deprecated because there no longer was a way to
claim just control over a single rfkill instance.
This file was scheduled to be removed in 2012, and was removed
in 2016.
Values: 0: Kernel handles events
Values: 0: Kernel handles events

1
Documentation/ABI/removed/video1394
View File

@ -8,6 +8,7 @@ Description:
performance issues in its first generation. Any video1394 user had
to use raw1394 + libraw1394 too because video1394 did not provide
asynchronous I/O for device discovery and configuration.
Replaced by /dev/fw*, i.e. the <linux/firewire-cdev.h> ABI of
firewire-core.

67
Documentation/ABI/stable/firewire-cdev
View File

@ -14,13 +14,17 @@ Description:
Each /dev/fw* is associated with one IEEE 1394 node, which can
be remote or local nodes. Operations on a /dev/fw* file have
different scope:
- The 1394 node which is associated with the file:
- Asynchronous request transmission
- Get the Configuration ROM
- Query node ID
- Query maximum speed of the path between this node
and local node
- The 1394 bus (i.e. "card") to which the node is attached to:
- Isochronous stream transmission and reception
- Asynchronous stream transmission and reception
- Asynchronous broadcast request transmission
@ -31,7 +35,9 @@ Description:
manager
- Query cycle time
- Bus reset initiation, bus reset event reception
- All 1394 buses:
- Allocation of IEEE 1212 address ranges on the local
link layers, reception of inbound requests to such
an address range, asynchronous response transmission
@ -43,6 +49,7 @@ Description:
userland implement different access permission models, some
operations are restricted to /dev/fw* files that are associated
with a local node:
- Addition of descriptors or directories to the local
nodes' Configuration ROM
- PHY packet transmission and reception
@ -55,50 +62,50 @@ Description:
The following file operations are supported:
open(2)
Currently the only useful flags are O_RDWR.
Currently the only useful flags are O_RDWR.
ioctl(2)
Initiate various actions. Some take immediate effect, others
are performed asynchronously while or after the ioctl returns.
See the inline documentation in <linux/firewire-cdev.h> for
descriptions of all ioctls.
Initiate various actions. Some take immediate effect, others
are performed asynchronously while or after the ioctl returns.
See the inline documentation in <linux/firewire-cdev.h> for
descriptions of all ioctls.
poll(2), select(2), epoll_wait(2) etc.
Watch for events to become available to be read.
Watch for events to become available to be read.
read(2)
Receive various events. There are solicited events like
outbound asynchronous transaction completion or isochronous
buffer completion, and unsolicited events such as bus resets,
request reception, or PHY packet reception. Always use a read
buffer which is large enough to receive the largest event that
could ever arrive. See <linux/firewire-cdev.h> for descriptions
of all event types and for which ioctls affect reception of
events.
Receive various events. There are solicited events like
outbound asynchronous transaction completion or isochronous
buffer completion, and unsolicited events such as bus resets,
request reception, or PHY packet reception. Always use a read
buffer which is large enough to receive the largest event that
could ever arrive. See <linux/firewire-cdev.h> for descriptions
of all event types and for which ioctls affect reception of
events.
mmap(2)
Allocate a DMA buffer for isochronous reception or transmission
and map it into the process address space. The arguments should
be used as follows: addr = NULL, length = the desired buffer
size, i.e. number of packets times size of largest packet,
prot = at least PROT_READ for reception and at least PROT_WRITE
for transmission, flags = MAP_SHARED, fd = the handle to the
/dev/fw*, offset = 0.
Allocate a DMA buffer for isochronous reception or transmission
and map it into the process address space. The arguments should
be used as follows: addr = NULL, length = the desired buffer
size, i.e. number of packets times size of largest packet,
prot = at least PROT_READ for reception and at least PROT_WRITE
for transmission, flags = MAP_SHARED, fd = the handle to the
/dev/fw*, offset = 0.
Isochronous reception works in packet-per-buffer fashion except
for multichannel reception which works in buffer-fill mode.
munmap(2)
Unmap the isochronous I/O buffer from the process address space.
Unmap the isochronous I/O buffer from the process address space.
close(2)
Besides stopping and freeing I/O contexts that were associated
with the file descriptor, back out any changes to the local
nodes' Configuration ROM. Deallocate isochronous channels and
bandwidth at the IRM that were marked for kernel-assisted
re- and deallocation.
Besides stopping and freeing I/O contexts that were associated
with the file descriptor, back out any changes to the local
nodes' Configuration ROM. Deallocate isochronous channels and
bandwidth at the IRM that were marked for kernel-assisted
re- and deallocation.
Users: libraw1394
libdc1394
libhinawa
Users: libraw1394;
libdc1394;
libhinawa;
tools like linux-firewire-utils, fwhack, ...

26
Documentation/ABI/stable/sysfs-acpi-pmprofile
View File

@ -1,22 +1,26 @@
What: /sys/firmware/acpi/pm_profile
What: /sys/firmware/acpi/pm_profile
Date: 03-Nov-2011
KernelVersion: v3.2
Contact: linux-acpi@vger.kernel.org
Description: The ACPI pm_profile sysfs interface exports the platform
Description: The ACPI pm_profile sysfs interface exports the platform
power management (and performance) requirement expectations
as provided by BIOS. The integer value is directly passed as
retrieved from the FADT ACPI table.
Values: For possible values see ACPI specification:
Values: For possible values see ACPI specification:
5.2.9 Fixed ACPI Description Table (FADT)
Field: Preferred_PM_Profile
Currently these values are defined by spec:
0 Unspecified
1 Desktop
2 Mobile
3 Workstation
4 Enterprise Server
5 SOHO Server
6 Appliance PC
7 Performance Server
== =================
0 Unspecified
1 Desktop
2 Mobile
3 Workstation
4 Enterprise Server
5 SOHO Server
6 Appliance PC
7 Performance Server
>7 Reserved
== =================

3
Documentation/ABI/stable/sysfs-bus-firewire
View File

@ -47,6 +47,7 @@ Description:
IEEE 1394 node device attribute.
Read-only and immutable.
Values: 1: The sysfs entry represents a local node (a controller card).
0: The sysfs entry represents a remote node.
@ -125,7 +126,9 @@ Description:
Read-only attribute, immutable during the target's lifetime.
Format, as exposed by firewire-sbp2 since 2.6.22, May 2007:
Colon-separated hexadecimal string representations of
u64 EUI-64 : u24 directory_ID : u16 LUN
without 0x prefixes, without whitespace. The former sbp2 driver
(removed in 2.6.37 after being superseded by firewire-sbp2) used
a somewhat shorter format which was not as close to SAM.

19
Documentation/ABI/stable/sysfs-bus-nvmem
View File

@ -9,13 +9,14 @@ Description:
Note: This file is only present if CONFIG_NVMEM_SYSFS
is enabled
ex:
hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
ex::
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
0000000 0000 0000 0000 0000 0000 0000 0000 0000
...
*
0001000
hexdump /sys/bus/nvmem/devices/qfprom0/nvmem
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
0000000 0000 0000 0000 0000 0000 0000 0000 0000
...
*
0001000

6
Documentation/ABI/stable/sysfs-bus-usb
View File

@ -50,8 +50,10 @@ Description:
Tools can use this file and the connected_duration file to
compute the percentage of time that a device has been active.
For example,
echo $((100 * `cat active_duration` / `cat connected_duration`))
For example::
echo $((100 * `cat active_duration` / `cat connected_duration`))
will give an integer percentage. Note that this does not
account for counter wrap.
Users:

7
Documentation/ABI/stable/sysfs-bus-vmbus
View File

@ -63,13 +63,6 @@ Contact: Stephen Hemminger <sthemmin@microsoft.com>
Description: VCPU (sub)channel is affinitized to
Users: tools/hv/lsvmbus and other debugging tools
What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/cpu
Date: September. 2017
KernelVersion: 4.14
Contact: Stephen Hemminger <sthemmin@microsoft.com>
Description: VCPU (sub)channel is affinitized to
Users: tools/hv/lsvmbus and other debugging tools
What: /sys/bus/vmbus/devices/<UUID>/channels/<N>/in_mask
Date: September. 2017
KernelVersion: 4.14

1
Documentation/ABI/stable/sysfs-bus-w1
View File

@ -6,6 +6,7 @@ Description: Bus scanning interval, microseconds component.
control systems are attached/generate presence for as short as
100 ms - hence the tens-to-hundreds milliseconds scan intervals
are required.
see Documentation/w1/w1-generic.rst for detailed information.
Users: any user space application which wants to know bus scanning
interval

1
Documentation/ABI/stable/sysfs-class-backlight
View File

@ -4,6 +4,7 @@ KernelVersion: 2.6.12
Contact: Richard Purdie <rpurdie@rpsys.net>
Description:
Control BACKLIGHT power, values are FB_BLANK_* from fb.h
- FB_BLANK_UNBLANK (0) : power on.
- FB_BLANK_POWERDOWN (4) : power off
Users: HAL

93
Documentation/ABI/stable/sysfs-class-infiniband
View File

@ -8,12 +8,14 @@ Date: Apr, 2005
KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
Description:
=============== ===========================================
node_type: (RO) Node type (CA, RNIC, usNIC, usNIC UDP,
switch or router)
node_guid: (RO) Node GUID
sys_image_guid: (RO) System image GUID
=============== ===========================================
What: /sys/class/infiniband/<device>/node_desc
@ -47,6 +49,7 @@ KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
Description:
=============== ===============================================
lid: (RO) Port LID
rate: (RO) Port data rate (active width * active
@ -66,8 +69,9 @@ Description:
cap_mask: (RO) Port capability mask. 2 bits here are
settable- IsCommunicationManagementSupported
(set when CM module is loaded) and IsSM (set via
open of issmN file).
(set when CM module is loaded) and IsSM (set
via open of issmN file).
=============== ===============================================
What: /sys/class/infiniband/<device>/ports/<port-num>/link_layer
@ -103,8 +107,7 @@ Date: Apr, 2005
KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
Description:
Errors info:
-----------
**Errors info**:
symbol_error: (RO) Total number of minor link errors detected on
one or more physical lanes.
@ -142,8 +145,7 @@ Description:
intervention. It can also indicate hardware issues or extremely
poor link signal integrity
Data info:
---------
**Data info**:
port_xmit_data: (RO) Total number of data octets, divided by 4
(lanes), transmitted on all VLs. This is 64 bit counter
@ -176,8 +178,7 @@ Description:
transmitted on all VLs from the port. This may include multicast
packets with errors.
Misc info:
---------
**Misc info**:
port_xmit_discards: (RO) Total number of outbound packets
discarded by the port because the port is down or congested.
@ -244,9 +245,11 @@ Description:
two umad devices and two issm devices, while a switch will have
one device of each type (for switch port 0).
======= =====================================
ibdev: (RO) Show Infiniband (IB) device name
port: (RO) Display port number
======= =====================================
What: /sys/class/infiniband_mad/abi_version
@ -264,10 +267,12 @@ Date: Sept, 2005
KernelVersion: v2.6.14
Contact: linux-rdma@vger.kernel.org
Description:
=============== ===========================================
ibdev: (RO) Display Infiniband (IB) device name
abi_version: (RO) Show ABI version of IB device specific
interfaces.
=============== ===========================================
What: /sys/class/infiniband_verbs/abi_version
@ -289,12 +294,14 @@ Date: Apr, 2005
KernelVersion: v2.6.12
Contact: linux-rdma@vger.kernel.org
Description:
=============== ================================================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host Channel Adapter type: MT23108, MT25208
(MT23108 compat mode), MT25208 or MT25204
board_id: (RO) Manufacturing board ID
=============== ================================================
sysfs interface for Mellanox ConnectX HCA IB driver (mlx4)
@ -307,11 +314,13 @@ Date: Sep, 2007
KernelVersion: v2.6.24
Contact: linux-rdma@vger.kernel.org
Description:
=============== ===============================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host channel adapter type
board_id: (RO) Manufacturing board ID
=============== ===============================
What: /sys/class/infiniband/mlx4_X/iov/ports/<port-num>/gids/<n>
@ -337,6 +346,7 @@ Description:
example, ports/1/pkeys/10 contains the value at index 10 in port
1's P_Key table.
======================= ==========================================
gids/<n>: (RO) The physical port gids n = 0..127
admin_guids/<n>: (RW) Allows examining or changing the
@ -365,6 +375,7 @@ Description:
guest, whenever it uses its pkey index
1, will actually be using the real pkey
index 10.
======================= ==========================================
What: /sys/class/infiniband/mlx4_X/iov/<pci-slot-num>/ports/<m>/smi_enabled
@ -376,12 +387,14 @@ Description:
Enabling QP0 on VFs for selected VF/port. By default, no VFs are
enabled for QP0 operation.
smi_enabled: (RO) Indicates whether smi is currently enabled
for the indicated VF/port
================= ==== ===========================================
smi_enabled: (RO) Indicates whether smi is currently enabled
for the indicated VF/port
enable_smi_admin:(RW) Used by the admin to request that smi
capability be enabled or disabled for the
indicated VF/port. 0 = disable, 1 = enable.
enable_smi_admin: (RW) Used by the admin to request that smi
capability be enabled or disabled for the
indicated VF/port. 0 = disable, 1 = enable.
================= ==== ===========================================
The requested enablement will occur at the next reset of the VF
(e.g. driver restart on the VM which owns the VF).
@ -398,6 +411,7 @@ KernelVersion: v2.6.35
Contact: linux-rdma@vger.kernel.org
Description:
=============== =============================================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Driver short name. Should normally match
@ -406,6 +420,7 @@ Description:
board_id: (RO) Manufacturing board id. (Vendor + device
information)
=============== =============================================
sysfs interface for Intel IB driver qib
@ -426,6 +441,7 @@ Date: May, 2010
KernelVersion: v2.6.35
Contact: linux-rdma@vger.kernel.org
Description:
=============== ======================================================
version: (RO) Display version information of installed software
and drivers.
@ -452,6 +468,7 @@ Description:
chip_reset: (WO) Reset the chip if possible by writing
"reset" to this file. Only allowed if no user
contexts are open that use chip resources.
=============== ======================================================
What: /sys/class/infiniband/qibX/ports/N/sl2vl/[0-15]
@ -471,14 +488,16 @@ Contact: linux-rdma@vger.kernel.org
Description:
Per-port congestion control. Both are binary attributes.
cc_table_bin: (RO) Congestion control table size followed by
=============== ================================================
cc_table_bin (RO) Congestion control table size followed by
table entries.
cc_settings_bin:(RO) Congestion settings: port control, control
cc_settings_bin (RO) Congestion settings: port control, control
map and an array of 16 entries for the
congestion entries - increase, timer, event log
trigger threshold and the minimum injection rate
delay.
=============== ================================================
What: /sys/class/infiniband/qibX/ports/N/linkstate/loopback
What: /sys/class/infiniband/qibX/ports/N/linkstate/led_override
@ -491,6 +510,7 @@ Contact: linux-rdma@vger.kernel.org
Description:
[to be documented]
=============== ===============================================
loopback: (WO)
led_override: (WO)
hrtbt_enable: (RW)
@ -501,6 +521,7 @@ Description:
errors. Possible states are- "Initted",
"Present", "IB_link_up", "IB_configured" or
"Fatal_Hardware_Error".
=============== ===============================================
What: /sys/class/infiniband/qibX/ports/N/diag_counters/rc_resends
What: /sys/class/infiniband/qibX/ports/N/diag_counters/seq_naks
@ -549,6 +570,7 @@ Contact: Christian Benvenuti <benve@cisco.com>,
linux-rdma@vger.kernel.org
Description:
=============== ===============================================
board_id: (RO) Manufacturing board id
config: (RO) Report the configuration for this PF
@ -561,6 +583,7 @@ Description:
iface: (RO) Shows which network interface this usNIC
entry is associated to (visible with ifconfig).
=============== ===============================================
What: /sys/class/infiniband/usnic_X/qpn/summary
What: /sys/class/infiniband/usnic_X/qpn/context
@ -605,6 +628,7 @@ Date: May, 2016
KernelVersion: v4.6
Contact: linux-rdma@vger.kernel.org
Description:
=============== =============================================
hw_rev: (RO) Hardware revision number
board_id: (RO) Manufacturing board id
@ -623,6 +647,7 @@ Description:
available.
tempsense: (RO) Thermal sense information
=============== =============================================
What: /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_settings_bin
@ -634,19 +659,21 @@ Contact: linux-rdma@vger.kernel.org
Description:
Per-port congestion control.
cc_table_bin: (RO) CCA tables used by PSM2 Congestion control
=============== ================================================
cc_table_bin (RO) CCA tables used by PSM2 Congestion control
table size followed by table entries. Binary
attribute.
cc_settings_bin:(RO) Congestion settings: port control, control
cc_settings_bin (RO) Congestion settings: port control, control
map and an array of 16 entries for the
congestion entries - increase, timer, event log
trigger threshold and the minimum injection rate
delay. Binary attribute.
cc_prescan: (RW) enable prescanning for faster BECN
cc_prescan (RW) enable prescanning for faster BECN
response. Write "on" to enable and "off" to
disable.
=============== ================================================
What: /sys/class/infiniband/hfi1_X/ports/N/sc2vl/[0-31]
What: /sys/class/infiniband/hfi1_X/ports/N/sl2sc/[0-31]
@ -655,11 +682,13 @@ Date: May, 2016
KernelVersion: v4.6
Contact: linux-rdma@vger.kernel.org
Description:
=============== ===================================================
sc2vl/: (RO) 32 files (0 - 31) used to translate sl->vl
sl2sc/: (RO) 32 files (0 - 31) used to translate sl->sc
vl2mtu/: (RO) 16 files (0 - 15) used to determine MTU for vl
=============== ===================================================
What: /sys/class/infiniband/hfi1_X/sdma_N/cpu_list
@ -670,26 +699,28 @@ Contact: linux-rdma@vger.kernel.org
Description:
sdma<N>/ contains one directory per sdma engine (0 - 15)
=============== ==============================================
cpu_list: (RW) List of cpus for user-process to sdma
engine assignment.
vl: (RO) Displays the virtual lane (vl) the sdma
engine maps to.
=============== ==============================================
This interface gives the user control on the affinity settings
for the device. As an example, to set an sdma engine irq
affinity and thread affinity of a user processes to use the
sdma engine, which is "near" in terms of NUMA configuration, or
physical cpu location, the user will do:
physical cpu location, the user will do::
echo "3" > /proc/irq/<N>/smp_affinity_list
echo "4-7" > /sys/devices/.../sdma3/cpu_list
cat /sys/devices/.../sdma3/vl
0
echo "8" > /proc/irq/<M>/smp_affinity_list
echo "9-12" > /sys/devices/.../sdma4/cpu_list
cat /sys/devices/.../sdma4/vl
1
echo "3" > /proc/irq/<N>/smp_affinity_list
echo "4-7" > /sys/devices/.../sdma3/cpu_list
cat /sys/devices/.../sdma3/vl
0
echo "8" > /proc/irq/<M>/smp_affinity_list
echo "9-12" > /sys/devices/.../sdma4/cpu_list
cat /sys/devices/.../sdma4/vl
1
to make sure that when a process runs on cpus 4,5,6, or 7, and
uses vl=0, then sdma engine 3 is selected by the driver, and
@ -711,11 +742,13 @@ Date: Jan, 2016
KernelVersion: v4.10
Contact: linux-rdma@vger.kernel.org
Description:
=============== ==== ========================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Show HCA type (I40IW)
board_id: (RO) I40IW board ID
=============== ==== ========================
sysfs interface for QLogic qedr NIC Driver
@ -728,9 +761,11 @@ KernelVersion: v4.10
Contact: linux-rdma@vger.kernel.org
Description:
=============== ==== ========================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Display HCA type
=============== ==== ========================
sysfs interface for VMware Paravirtual RDMA driver
@ -744,11 +779,13 @@ KernelVersion: v4.10
Contact: linux-rdma@vger.kernel.org
Description:
=============== ==== =====================================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host channel adapter type
board_id: (RO) Display PVRDMA manufacturing board ID
=============== ==== =====================================
sysfs interface for Broadcom NetXtreme-E RoCE driver
@ -760,6 +797,8 @@ Date: Feb, 2017
KernelVersion: v4.11
Contact: linux-rdma@vger.kernel.org
Description:
=============== ==== =========================
hw_rev: (RO) Hardware revision number
hca_type: (RO) Host channel adapter type
=============== ==== =========================

13
Documentation/ABI/stable/sysfs-class-rfkill
View File

@ -2,7 +2,7 @@ rfkill - radio frequency (RF) connector kill switch support
For details to this subsystem look at Documentation/driver-api/rfkill.rst.
For the deprecated /sys/class/rfkill/*/claim knobs of this interface look in
For the deprecated ``/sys/class/rfkill/*/claim`` knobs of this interface look in
Documentation/ABI/removed/sysfs-class-rfkill.
What: /sys/class/rfkill
@ -36,9 +36,10 @@ KernelVersion v2.6.22
Contact: linux-wireless@vger.kernel.org
Description: Whether the soft blocked state is initialised from non-volatile
storage at startup.
Values: A numeric value.
0: false
1: true
Values: A numeric value:
- 0: false
- 1: true
What: /sys/class/rfkill/rfkill[0-9]+/state
@ -54,6 +55,7 @@ Description: Current state of the transmitter.
through this interface. There will likely be another attempt to
remove it in the future.
Values: A numeric value.
0: RFKILL_STATE_SOFT_BLOCKED
transmitter is turned off by software
1: RFKILL_STATE_UNBLOCKED
@ -69,6 +71,7 @@ KernelVersion v2.6.34
Contact: linux-wireless@vger.kernel.org
Description: Current hardblock state. This file is read only.
Values: A numeric value.
0: inactive
The transmitter is (potentially) active.
1: active
@ -82,7 +85,9 @@ KernelVersion v2.6.34
Contact: linux-wireless@vger.kernel.org
Description: Current softblock state. This file is read and write.
Values: A numeric value.
0: inactive
The transmitter is (potentially) active.
1: active
The transmitter is turned off by software.

94
Documentation/ABI/stable/sysfs-class-tpm
View File

@ -32,11 +32,11 @@ KernelVersion: 2.6.12
Contact: linux-integrity@vger.kernel.org
Description: The "caps" property contains TPM manufacturer and version info.
Example output:
Example output::
Manufacturer: 0x53544d20
TCG version: 1.2
Firmware version: 8.16
Manufacturer: 0x53544d20
TCG version: 1.2
Firmware version: 8.16
Manufacturer is a hex dump of the 4 byte manufacturer info
space in a TPM. TCG version shows the TCG TPM spec level that
@ -54,9 +54,9 @@ Description: The "durations" property shows the 3 vendor-specific values
any longer than necessary before starting to poll for a
result.
Example output:
Example output::
3015000 4508000 180995000 [original]
3015000 4508000 180995000 [original]
Here the short, medium and long durations are displayed in
usecs. "[original]" indicates that the values are displayed
@ -92,14 +92,14 @@ Description: The "pcrs" property will dump the current value of all Platform
values may be constantly changing, the output is only valid
for a snapshot in time.
Example output:
Example output::
PCR-00: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-01: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-02: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-03: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-04: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
...
PCR-00: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-01: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-02: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-03: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
PCR-04: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
...
The number of PCRs and hex bytes needed to represent a PCR
value will vary depending on TPM chip version. For TPM 1.1 and
@ -119,44 +119,44 @@ Description: The "pubek" property will return the TPM's public endorsement
ated at TPM manufacture time and exists for the life of the
chip.
Example output:
Example output::
Algorithm: 00 00 00 01
Encscheme: 00 03
Sigscheme: 00 01
Parameters: 00 00 08 00 00 00 00 02 00 00 00 00
Modulus length: 256
Modulus:
B4 76 41 82 C9 20 2C 10 18 40 BC 8B E5 44 4C 6C
3A B2 92 0C A4 9B 2A 83 EB 5C 12 85 04 48 A0 B6
1E E4 81 84 CE B2 F2 45 1C F0 85 99 61 02 4D EB
86 C4 F7 F3 29 60 52 93 6B B2 E5 AB 8B A9 09 E3
D7 0E 7D CA 41 BF 43 07 65 86 3C 8C 13 7A D0 8B
82 5E 96 0B F8 1F 5F 34 06 DA A2 52 C1 A9 D5 26
0F F4 04 4B D9 3F 2D F2 AC 2F 74 64 1F 8B CD 3E
1E 30 38 6C 70 63 69 AB E2 50 DF 49 05 2E E1 8D
6F 78 44 DA 57 43 69 EE 76 6C 38 8A E9 8E A3 F0
A7 1F 3C A8 D0 12 15 3E CA 0E BD FA 24 CD 33 C6
47 AE A4 18 83 8E 22 39 75 93 86 E6 FD 66 48 B6
10 AD 94 14 65 F9 6A 17 78 BD 16 53 84 30 BF 70
E0 DC 65 FD 3C C6 B0 1E BF B9 C1 B5 6C EF B1 3A
F8 28 05 83 62 26 11 DC B4 6B 5A 97 FF 32 26 B6
F7 02 71 CF 15 AE 16 DD D1 C1 8E A8 CF 9B 50 7B
C3 91 FF 44 1E CF 7C 39 FE 17 77 21 20 BD CE 9B
Algorithm: 00 00 00 01
Encscheme: 00 03
Sigscheme: 00 01
Parameters: 00 00 08 00 00 00 00 02 00 00 00 00
Modulus length: 256
Modulus:
B4 76 41 82 C9 20 2C 10 18 40 BC 8B E5 44 4C 6C
3A B2 92 0C A4 9B 2A 83 EB 5C 12 85 04 48 A0 B6
1E E4 81 84 CE B2 F2 45 1C F0 85 99 61 02 4D EB
86 C4 F7 F3 29 60 52 93 6B B2 E5 AB 8B A9 09 E3
D7 0E 7D CA 41 BF 43 07 65 86 3C 8C 13 7A D0 8B
82 5E 96 0B F8 1F 5F 34 06 DA A2 52 C1 A9 D5 26
0F F4 04 4B D9 3F 2D F2 AC 2F 74 64 1F 8B CD 3E
1E 30 38 6C 70 63 69 AB E2 50 DF 49 05 2E E1 8D
6F 78 44 DA 57 43 69 EE 76 6C 38 8A E9 8E A3 F0
A7 1F 3C A8 D0 12 15 3E CA 0E BD FA 24 CD 33 C6
47 AE A4 18 83 8E 22 39 75 93 86 E6 FD 66 48 B6
10 AD 94 14 65 F9 6A 17 78 BD 16 53 84 30 BF 70
E0 DC 65 FD 3C C6 B0 1E BF B9 C1 B5 6C EF B1 3A
F8 28 05 83 62 26 11 DC B4 6B 5A 97 FF 32 26 B6
F7 02 71 CF 15 AE 16 DD D1 C1 8E A8 CF 9B 50 7B
C3 91 FF 44 1E CF 7C 39 FE 17 77 21 20 BD CE 9B
Possible values:
Possible values::
Algorithm: TPM_ALG_RSA (1)
Encscheme: TPM_ES_RSAESPKCSv15 (2)
Algorithm: TPM_ALG_RSA (1)
Encscheme: TPM_ES_RSAESPKCSv15 (2)
TPM_ES_RSAESOAEP_SHA1_MGF1 (3)
Sigscheme: TPM_SS_NONE (1)
Parameters, a byte string of 3 u32 values:
Sigscheme: TPM_SS_NONE (1)
Parameters, a byte string of 3 u32 values:
Key Length (bits): 00 00 08 00 (2048)
Num primes: 00 00 00 02 (2)
Exponent Size: 00 00 00 00 (0 means the
default exp)
Modulus Length: 256 (bytes)
Modulus: The 256 byte Endorsement Key modulus
Modulus Length: 256 (bytes)
Modulus: The 256 byte Endorsement Key modulus
What: /sys/class/tpm/tpmX/device/temp_deactivated
Date: April 2006
@ -176,9 +176,9 @@ Description: The "timeouts" property shows the 4 vendor-specific values
timeouts is defined by the TPM interface spec that the chip
conforms to.
Example output:
Example output::
750000 750000 750000 750000 [original]
750000 750000 750000 750000 [original]
The four timeout values are shown in usecs, with a trailing
"[original]" or "[adjusted]" depending on whether the values
@ -191,6 +191,6 @@ Contact: linux-integrity@vger.kernel.org
Description: The "tpm_version_major" property shows the TCG spec major version
implemented by the TPM device.
Example output:
Example output::
2
2

5
Documentation/ABI/stable/sysfs-devices
View File

@ -1,5 +1,6 @@
# Note: This documents additional properties of any device beyond what
# is documented in Documentation/admin-guide/sysfs-rules.rst
Note:
This documents additional properties of any device beyond what
is documented in Documentation/admin-guide/sysfs-rules.rst
What: /sys/devices/*/of_node
Date: February 2015

62
Documentation/ABI/stable/sysfs-driver-firmware-zynqmp
View File

@ -12,13 +12,15 @@ Description:
resets. Three registers are used by the FSBL and
other Xilinx software products: GLOBAL_GEN_STORAGE{4:6}.
Usage:
# cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
# echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
Usage::
Example:
# cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
# echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
# cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
# echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
Example::
# cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
# echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
Users: Xilinx
@ -39,13 +41,15 @@ Description:
software products: PERS_GLOB_GEN_STORAGE{4:7}.
Register is reset only by a POR reset.
Usage:
# cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
# echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
Usage::
Example:
# cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
# echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
# cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
# echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
Example::
# cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
# echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
Users: Xilinx
@ -61,23 +65,28 @@ Description:
Following are available shutdown scopes(subtypes):
subsystem: Only the APU along with all of its peripherals
subsystem:
Only the APU along with all of its peripherals
not used by other processing units will be
shut down. This may result in the FPD power
domain being shut down provided that no other
processing unit uses FPD peripherals or DRAM.
ps_only: The complete PS will be shut down, including the
ps_only:
The complete PS will be shut down, including the
RPU, PMU, etc. Only the PL domain (FPGA)
remains untouched.
system: The complete system/device is shut down.
system:
The complete system/device is shut down.
Usage:
# cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
# echo <scope> > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
Usage::
Example:
# cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
# echo "subsystem" > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
# cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
# echo <scope> > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
Example::
# cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
# echo "subsystem" > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
Users: Xilinx
@ -94,10 +103,13 @@ Description:
system restart.
Usage:
Set healthy bit
# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
Unset healthy bit
# echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
Set healthy bit::
# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
Unset healthy bit::
# echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
Users: Xilinx

1
Documentation/ABI/stable/sysfs-driver-ib_srp
View File

@ -6,6 +6,7 @@ Description: Interface for making ib_srp connect to a new target.
One can request ib_srp to connect to a new target by writing
a comma-separated list of login parameters to this sysfs
attribute. The supported parameters are:
* id_ext, a 16-digit hexadecimal number specifying the eight
byte identifier extension in the 16-byte SRP target port
identifier. The target port identifier is sent by ib_srp

4
Documentation/ABI/stable/sysfs-driver-speakup
View File

@ -69,6 +69,7 @@ Description: Controls if typing interrupts output from speakup. With
speakup if for example
the say screen command is used before the
entire screen is read.
With no_interrupt set to one, if the say
screen command is used, and one then types on the keyboard,
speakup will continue to say the whole screen regardless until
@ -215,8 +216,10 @@ Description: This file contains names for key states.
Again, these are part of the help system. For instance, if you
had pressed speakup + keypad 3, you would hear:
"speakup keypad 3 is go to bottom edge."
The speakup key is depressed, so the name of the key state is
speakup.
This part of the message comes from the states collection.
What: /sys/accessibility/speakup/i18n/characters
@ -297,6 +300,7 @@ KernelVersion: 2.6
Contact: speakup@linux-speakup.org
Description: Controls if punctuation is spoken by speakup, or by the
synthesizer.
For example, speakup speaks ">" as "greater", while
the espeak synthesizer used by the soft driver speaks "greater
than". Zero lets speakup speak the punctuation. One lets the

4
Documentation/ABI/stable/sysfs-firmware-efi-vars
View File

@ -17,6 +17,7 @@ Description:
directory has a name of the form "<key>-<vendor guid>"
and contains the following files:
=============== ========================================
attributes: A read-only text file enumerating the
EFI variable flags. Potential values
include:
@ -59,12 +60,14 @@ Description:
size: As ASCII representation of the size of
the variable's value.
=============== ========================================
In addition, two other magic binary files are provided
in the top-level directory and are used for adding and
removing variables:
=============== ========================================
new_var: Takes a "struct efi_variable" and
instructs the EFI firmware to create a
new variable.
@ -73,3 +76,4 @@ Description:
instructs the EFI firmware to remove any
variable that has a matching vendor GUID
and variable key name.
=============== ========================================

5
Documentation/ABI/stable/sysfs-firmware-opal-dump
View File

@ -7,6 +7,7 @@ Description:
This is only for the powerpc/powernv platform.
=============== ===============================================
initiate_dump: When '1' is written to it,
we will initiate a dump.
Read this file for supported commands.
@ -19,8 +20,11 @@ Description:
and ID of the dump, use the id and type files.
Do not rely on any particular size of dump
type or dump id.
=============== ===============================================
Each dump has the following files:
=============== ===============================================
id: An ASCII representation of the dump ID
in hex (e.g. '0x01')
type: An ASCII representation of the type of
@ -39,3 +43,4 @@ Description:
inaccessible.
Reading this file will get a list of
supported actions.
=============== ===============================================

2
Documentation/ABI/stable/sysfs-firmware-opal-elog
View File

@ -38,6 +38,7 @@ Description:
For each log entry (directory), there are the following
files:
============== ================================================
id: An ASCII representation of the ID of the
error log, in hex - e.g. "0x01".
@ -58,3 +59,4 @@ Description:
entry will be removed from sysfs.
Reading this file will list the supported
operations (currently just acknowledge).
============== ================================================

3
Documentation/ABI/stable/sysfs-hypervisor-xen
View File

@ -33,6 +33,8 @@ Description: If running under Xen:
Space separated list of supported guest system types. Each type
is in the format: <class>-<major>.<minor>-<arch>
With:
======== ============================================
<class>: "xen" -- x86: paravirtualized, arm: standard
"hvm" -- x86 only: fully virtualized
<major>: major guest interface version
@ -43,6 +45,7 @@ Description: If running under Xen:
"x86_64": 64 bit x86 guest
"armv7l": 32 bit arm guest
"aarch64": 64 bit arm guest
======== ============================================
What: /sys/hypervisor/properties/changeset
Date: March 2009

11
Documentation/ABI/stable/vdso
View File

@ -1,3 +1,9 @@
What: vDSO
Date: July 2011
KernelVersion: 3.0
Contact: Andy Lutomirski <luto@kernel.org>
Description:
On some architectures, when the kernel loads any userspace program it
maps an ELF DSO into that program's address space. This DSO is called
the vDSO and it often contains useful and highly-optimized alternatives
@ -23,6 +29,7 @@ Unless otherwise noted, the set of symbols with any given version and the
ABI of those symbols is considered stable. It may vary across architectures,
though.
(As of this writing, this ABI documentation as been confirmed for x86_64.
Note:
As of this writing, this ABI documentation as been confirmed for x86_64.
The maintainers of the other vDSO-using architectures should confirm
that it is correct for their architecture.)
that it is correct for their architecture.

34
Documentation/ABI/testing/configfs-acpi
View File

@ -14,7 +14,8 @@ Description:
This group contains the configuration for user defined ACPI
tables. The attributes of a user define table are:
aml - a binary attribute that the user can use to
aml
- a binary attribute that the user can use to
fill in the ACPI aml definitions. Once the aml
data is written to this file and the file is
closed the table will be loaded and ACPI devices
@ -26,11 +27,26 @@ Description:
The rest of the attributes are read-only and are valid only
after the table has been loaded by filling the aml entry:
signature - ASCII table signature
length - length of table in bytes, including the header
revision - ACPI Specification minor version number
oem_id - ASCII OEM identification
oem_table_id - ASCII OEM table identification
oem_revision - OEM revision number
asl_compiler_id - ASCII ASL compiler vendor ID
asl_compiler_revision - ASL compiler version
signature
- ASCII table signature
length
- length of table in bytes, including the header
revision
- ACPI Specification minor version number
oem_id
- ASCII OEM identification
oem_table_id
- ASCII OEM table identification
oem_revision
- OEM revision number
asl_compiler_id
- ASCII ASL compiler vendor ID
asl_compiler_revision
- ASL compiler version

135
Documentation/ABI/testing/configfs-most
View File

@ -15,22 +15,28 @@ KernelVersion: 5.2
Description:
The attributes:
buffer_size configure the buffer size for this channel
buffer_size
configure the buffer size for this channel
subbuffer_size configure the sub-buffer size for this channel
subbuffer_size
configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
num_buffers configure number of buffers used for this
num_buffers
configure number of buffers used for this
channel
datatype configure type of data that will travel over
datatype
configure type of data that will travel over
this channel
direction configure whether this link will be an input
direction
configure whether this link will be an input
or output
dbr_size configure DBR data buffer size (this is used
dbr_size
configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
@ -39,18 +45,23 @@ Description:
transmitted via USB (this is used for USB
communication only)
device name of the device the link is to be attached to
device
name of the device the link is to be attached to
channel name of the channel the link is to be attached to
channel
name of the channel the link is to be attached to
comp_params pass parameters needed by some components
comp_params
pass parameters needed by some components
create_link write '1' to this attribute to trigger the
create_link
write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
destroy_link write '1' to this attribute to destroy an
destroy_link
write '1' to this attribute to destroy an
active link
What: /sys/kernel/config/most_video/<link>
@ -59,22 +70,28 @@ KernelVersion: 5.2
Description:
The attributes:
buffer_size configure the buffer size for this channel
buffer_size
configure the buffer size for this channel
subbuffer_size configure the sub-buffer size for this channel
subbuffer_size
configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
num_buffers configure number of buffers used for this
num_buffers
configure number of buffers used for this
channel
datatype configure type of data that will travel over
datatype
configure type of data that will travel over
this channel
direction configure whether this link will be an input
direction
configure whether this link will be an input
or output
dbr_size configure DBR data buffer size (this is used
dbr_size
configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
@ -83,18 +100,23 @@ Description:
transmitted via USB (this is used for USB
communication only)
device name of the device the link is to be attached to
device
name of the device the link is to be attached to
channel name of the channel the link is to be attached to
channel
name of the channel the link is to be attached to
comp_params pass parameters needed by some components
comp_params
pass parameters needed by some components
create_link write '1' to this attribute to trigger the
create_link
write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
destroy_link write '1' to this attribute to destroy an
destroy_link
write '1' to this attribute to destroy an
active link
What: /sys/kernel/config/most_net/<link>
@ -103,22 +125,28 @@ KernelVersion: 5.2
Description:
The attributes:
buffer_size configure the buffer size for this channel
buffer_size
configure the buffer size for this channel
subbuffer_size configure the sub-buffer size for this channel
subbuffer_size
configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
num_buffers configure number of buffers used for this
num_buffers
configure number of buffers used for this
channel
datatype configure type of data that will travel over
datatype
configure type of data that will travel over
this channel
direction configure whether this link will be an input
direction
configure whether this link will be an input
or output
dbr_size configure DBR data buffer size (this is used
dbr_size
configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
@ -127,18 +155,23 @@ Description:
transmitted via USB (this is used for USB
communication only)
device name of the device the link is to be attached to
device
name of the device the link is to be attached to
channel name of the channel the link is to be attached to
channel
name of the channel the link is to be attached to
comp_params pass parameters needed by some components
comp_params
pass parameters needed by some components
create_link write '1' to this attribute to trigger the
create_link
write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
destroy_link write '1' to this attribute to destroy an
destroy_link
write '1' to this attribute to destroy an
active link
What: /sys/kernel/config/most_sound/<card>
@ -147,7 +180,8 @@ KernelVersion: 5.2
Description:
The attributes:
create_card write '1' to this attribute to trigger the
create_card
write '1' to this attribute to trigger the
registration of the sound card with the ALSA
subsystem.
@ -157,22 +191,28 @@ KernelVersion: 5.2
Description:
The attributes:
buffer_size configure the buffer size for this channel
buffer_size
configure the buffer size for this channel
subbuffer_size configure the sub-buffer size for this channel
subbuffer_size
configure the sub-buffer size for this channel
(needed for synchronous and isochrnous data)
num_buffers configure number of buffers used for this
num_buffers
configure number of buffers used for this
channel
datatype configure type of data that will travel over
datatype
configure type of data that will travel over
this channel
direction configure whether this link will be an input
direction
configure whether this link will be an input
or output
dbr_size configure DBR data buffer size (this is used
dbr_size
configure DBR data buffer size (this is used
for MediaLB communication only)
packets_per_xact
@ -181,16 +221,21 @@ Description:
transmitted via USB (this is used for USB
communication only)
device name of the device the link is to be attached to
device
name of the device the link is to be attached to
channel name of the channel the link is to be attached to
channel
name of the channel the link is to be attached to
comp_params pass parameters needed by some components
comp_params
pass parameters needed by some components
create_link write '1' to this attribute to trigger the
create_link
write '1' to this attribute to trigger the
creation of the link. In case of speculative
configuration, the creation is post-poned until
a physical device is being attached to the bus.
destroy_link write '1' to this attribute to destroy an
destroy_link
write '1' to this attribute to destroy an
active link

36
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@ -10,22 +10,24 @@ Description:
This interfaces can be used to show spear's PCIe device capability.
Nodes are only visible when configfs is mounted. To mount configfs
in /config directory use:
# mount -t configfs none /config/
in /config directory use::
For nth PCIe Device Controller
/config/pcie-gadget.n/
link ... used to enable ltssm and read its status.
int_type ...used to configure and read type of supported
interrupt
no_of_msi ... used to configure number of MSI vector needed and
# mount -t configfs none /config/
For nth PCIe Device Controller /config/pcie-gadget.n/:
=============== ======================================================
link used to enable ltssm and read its status.
int_type used to configure and read type of supported interrupt
no_of_msi used to configure number of MSI vector needed and
to read no of MSI granted.
inta ... write 1 to assert INTA and 0 to de-assert.
send_msi ... write MSI vector to be sent.
vendor_id ... used to write and read vendor id (hex)
device_id ... used to write and read device id (hex)
bar0_size ... used to write and read bar0_size
bar0_address ... used to write and read bar0 mapped area in hex.
bar0_rw_offset ... used to write and read offset of bar0 where
bar0_data will be written or read.
bar0_data ... used to write and read data at bar0_rw_offset.
inta write 1 to assert INTA and 0 to de-assert.
send_msi write MSI vector to be sent.
vendor_id used to write and read vendor id (hex)
device_id used to write and read device id (hex)
bar0_size used to write and read bar0_size
bar0_address used to write and read bar0 mapped area in hex.
bar0_rw_offset used to write and read offset of bar0 where bar0_data
will be written or read.
bar0_data used to write and read data at bar0_rw_offset.
=============== ======================================================

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@ -12,22 +12,24 @@ Description:
The attributes of a gadget:
UDC - bind a gadget to UDC/unbind a gadget;
write UDC's name found in /sys/class/udc/*
to bind a gadget, empty string "" to unbind.
================ ============================================
UDC bind a gadget to UDC/unbind a gadget;
write UDC's name found in /sys/class/udc/*
to bind a gadget, empty string "" to unbind.
max_speed - maximum speed the driver supports. Valid
names are super-speed-plus, super-speed,
high-speed, full-speed, and low-speed.
max_speed maximum speed the driver supports. Valid
names are super-speed-plus, super-speed,
high-speed, full-speed, and low-speed.
bDeviceClass - USB device class code
bDeviceSubClass - USB device subclass code
bDeviceProtocol - USB device protocol code
bMaxPacketSize0 - maximum endpoint 0 packet size
bcdDevice - bcd device release number
bcdUSB - bcd USB specification version number
idProduct - product ID
idVendor - vendor ID
bDeviceClass USB device class code
bDeviceSubClass USB device subclass code
bDeviceProtocol USB device protocol code
bMaxPacketSize0 maximum endpoint 0 packet size
bcdDevice bcd device release number
bcdUSB bcd USB specification version number
idProduct product ID
idVendor vendor ID
================ ============================================
What: /config/usb-gadget/gadget/configs
Date: Jun 2013
@ -41,8 +43,10 @@ KernelVersion: 3.11
Description:
The attributes of a configuration:
bmAttributes - configuration characteristics
MaxPower - maximum power consumption from the bus
================ ======================================
bmAttributes configuration characteristics
MaxPower maximum power consumption from the bus
================ ======================================
What: /config/usb-gadget/gadget/configs/config/strings
Date: Jun 2013
@ -57,7 +61,9 @@ KernelVersion: 3.11
Description:
The attributes:
configuration - configuration description
================ =========================
configuration configuration description
================ =========================
What: /config/usb-gadget/gadget/functions
@ -76,8 +82,10 @@ Description:
The attributes:
compatible_id - 8-byte string for "Compatible ID"
sub_compatible_id - 8-byte string for "Sub Compatible ID"
================= =====================================
compatible_id 8-byte string for "Compatible ID"
sub_compatible_id 8-byte string for "Sub Compatible ID"
================= =====================================
What: /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>/<property>
Date: May 2014
@ -89,16 +97,19 @@ Description:
The attributes:
type - value 1..7 for interpreting the data
1: unicode string
2: unicode string with environment variable
3: binary
4: little-endian 32-bit
5: big-endian 32-bit
6: unicode string with a symbolic link
7: multiple unicode strings
data - blob of data to be interpreted depending on
===== ===============================================
type value 1..7 for interpreting the data
- 1: unicode string
- 2: unicode string with environment variable
- 3: binary
- 4: little-endian 32-bit
- 5: big-endian 32-bit
- 6: unicode string with a symbolic link
- 7: multiple unicode strings
data blob of data to be interpreted depending on
type
===== ===============================================
What: /config/usb-gadget/gadget/strings
Date: Jun 2013
@ -113,9 +124,11 @@ KernelVersion: 3.11
Description:
The attributes:
serialnumber - gadget's serial number (string)
product - gadget's product description
manufacturer - gadget's manufacturer description
============ =================================
serialnumber gadget's serial number (string)
product gadget's product description
manufacturer gadget's manufacturer description
============ =================================
What: /config/usb-gadget/gadget/os_desc
Date: May 2014
@ -123,8 +136,10 @@ KernelVersion: 3.16
Description:
This group contains "OS String" extension handling attributes.
use - flag turning "OS Desctiptors" support on/off
b_vendor_code - one-byte value used for custom per-device and
============= ===============================================
use flag turning "OS Desctiptors" support on/off
b_vendor_code one-byte value used for custom per-device and
per-interface requests
qw_sign - an identifier to be reported as "OS String"
qw_sign an identifier to be reported as "OS String"
proper
============= ===============================================

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@ -4,13 +4,17 @@ KernelVersion: 3.11
Description:
The attributes:
ifname - network device interface name associated with
ifname
- network device interface name associated with
this function instance
qmult - queue length multiplier for high and
qmult
- queue length multiplier for high and
super speed
host_addr - MAC address of host's end of this
host_addr
- MAC address of host's end of this
Ethernet over USB link
dev_addr - MAC address of device's end of this
dev_addr
- MAC address of device's end of this
Ethernet over USB link

10
Documentation/ABI/testing/configfs-usb-gadget-eem
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@ -4,11 +4,13 @@ KernelVersion: 3.11
Description:
The attributes:
ifname - network device interface name associated with
========== =============================================
ifname network device interface name associated with
this function instance
qmult - queue length multiplier for high and
qmult queue length multiplier for high and
super speed
host_addr - MAC address of host's end of this
host_addr MAC address of host's end of this
Ethernet over USB link
dev_addr - MAC address of device's end of this
dev_addr MAC address of device's end of this
Ethernet over USB link
========== =============================================

10
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@ -4,8 +4,10 @@ KernelVersion: 3.19
Description:
The attributes:
protocol - HID protocol to use
report_desc - blob corresponding to HID report descriptors
============= ============================================
protocol HID protocol to use
report_desc blob corresponding to HID report descriptors
except the data passed through /dev/hidg<N>
report_length - HID report length
subclass - HID device subclass to use
report_length HID report length
subclass HID device subclass to use
============= ============================================

6
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@ -4,5 +4,7 @@ KernelVersion: 3.13
Description:
The attributes:
qlen - depth of loopback queue
buflen - buffer length
======= =======================
qlen depth of loopback queue
buflen buffer length
======= =======================

18
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@ -4,12 +4,14 @@ KernelVersion: 3.13
Description:
The attributes:
stall - Set to permit function to halt bulk endpoints.
=========== ==============================================
stall Set to permit function to halt bulk endpoints.
Disabled on some USB devices known not to work
correctly. You should set it to true.
num_buffers - Number of pipeline buffers. Valid numbers
num_buffers Number of pipeline buffers. Valid numbers
are 2..4. Available only if
CONFIG_USB_GADGET_DEBUG_FILES is set.
=========== ==============================================
What: /config/usb-gadget/gadget/functions/mass_storage.name/lun.name
Date: Oct 2013
@ -17,15 +19,17 @@ KernelVersion: 3.13
Description:
The attributes:
file - The path to the backing file for the LUN.
=========== ==============================================
file The path to the backing file for the LUN.
Required if LUN is not marked as removable.
ro - Flag specifying access to the LUN shall be
ro Flag specifying access to the LUN shall be
read-only. This is implied if CD-ROM emulation
is enabled as well as when it was impossible
to open "filename" in R/W mode.
removable - Flag specifying that LUN shall be indicated as
removable Flag specifying that LUN shall be indicated as
being removable.
cdrom - Flag specifying that LUN shall be reported as
cdrom Flag specifying that LUN shall be reported as
being a CD-ROM.
nofua - Flag specifying that FUA flag
nofua Flag specifying that FUA flag
in SCSI WRITE(10,12)
=========== ==============================================

14
Documentation/ABI/testing/configfs-usb-gadget-midi
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@ -4,9 +4,11 @@ KernelVersion: 3.19
Description:
The attributes:
index - index value for the USB MIDI adapter
id - ID string for the USB MIDI adapter
buflen - MIDI buffer length
qlen - USB read request queue length
in_ports - number of MIDI input ports
out_ports - number of MIDI output ports
========== ====================================
index index value for the USB MIDI adapter
id ID string for the USB MIDI adapter
buflen MIDI buffer length
qlen USB read request queue length
in_ports number of MIDI input ports
out_ports number of MIDI output ports
========== ====================================

6
Documentation/ABI/testing/configfs-usb-gadget-printer
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@ -4,6 +4,8 @@ KernelVersion: 4.1
Description:
The attributes:
pnp_string - Data to be passed to the host in pnp string
q_len - Number of requests per endpoint
========== ===========================================
pnp_string Data to be passed to the host in pnp string
q_len Number of requests per endpoint
========== ===========================================

16
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@ -4,14 +4,16 @@ KernelVersion: 3.11
Description:
The attributes:
ifname - network device interface name associated with
========= =============================================
ifname network device interface name associated with
this function instance
qmult - queue length multiplier for high and
qmult queue length multiplier for high and
super speed
host_addr - MAC address of host's end of this
host_addr MAC address of host's end of this
Ethernet over USB link
dev_addr - MAC address of device's end of this
dev_addr MAC address of device's end of this
Ethernet over USB link
class - USB interface class, default is 02 (hex)
subclass - USB interface subclass, default is 06 (hex)
protocol - USB interface protocol, default is 00 (hex)
class USB interface class, default is 02 (hex)
subclass USB interface subclass, default is 06 (hex)
protocol USB interface protocol, default is 00 (hex)
========= =============================================

18
Documentation/ABI/testing/configfs-usb-gadget-sourcesink
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@ -4,11 +4,13 @@ KernelVersion: 3.13
Description:
The attributes:
pattern - 0 (all zeros), 1 (mod63), 2 (none)
isoc_interval - 1..16
isoc_maxpacket - 0 - 1023 (fs), 0 - 1024 (hs/ss)
isoc_mult - 0..2 (hs/ss only)
isoc_maxburst - 0..15 (ss only)
buflen - buffer length
bulk_qlen - depth of queue for bulk
iso_qlen - depth of queue for iso
============== ==================================
pattern 0 (all zeros), 1 (mod63), 2 (none)
isoc_interval 1..16
isoc_maxpacket 0 - 1023 (fs), 0 - 1024 (hs/ss)
isoc_mult 0..2 (hs/ss only)
isoc_maxburst 0..15 (ss only)
buflen buffer length
bulk_qlen depth of queue for bulk
iso_qlen depth of queue for iso
============== ==================================

10
Documentation/ABI/testing/configfs-usb-gadget-subset
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@ -4,11 +4,13 @@ KernelVersion: 3.11
Description:
The attributes:
ifname - network device interface name associated with
========== =============================================
ifname network device interface name associated with
this function instance
qmult - queue length multiplier for high and
qmult queue length multiplier for high and
super speed
host_addr - MAC address of host's end of this
host_addr MAC address of host's end of this
Ethernet over USB link
dev_addr - MAC address of device's end of this
dev_addr MAC address of device's end of this
Ethernet over USB link
========== =============================================

18
Documentation/ABI/testing/configfs-usb-gadget-uac1
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@ -4,11 +4,13 @@ KernelVersion: 4.14
Description:
The attributes:
c_chmask - capture channel mask
c_srate - capture sampling rate
c_ssize - capture sample size (bytes)
p_chmask - playback channel mask
p_srate - playback sampling rate
p_ssize - playback sample size (bytes)
req_number - the number of pre-allocated request
for both capture and playback
========== ===================================
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
req_number the number of pre-allocated request
for both capture and playback
========== ===================================

14
Documentation/ABI/testing/configfs-usb-gadget-uac2
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@ -4,9 +4,11 @@ KernelVersion: 3.18
Description:
The attributes:
c_chmask - capture channel mask
c_srate - capture sampling rate
c_ssize - capture sample size (bytes)
p_chmask - playback channel mask
p_srate - playback sampling rate
p_ssize - playback sample size (bytes)
========= ============================
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
========= ============================

220
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@ -3,9 +3,11 @@ Date: Dec 2014
KernelVersion: 4.0
Description: UVC function directory
streaming_maxburst - 0..15 (ss only)
streaming_maxpacket - 1..1023 (fs), 1..3072 (hs/ss)
streaming_interval - 1..16
=================== =============================
streaming_maxburst 0..15 (ss only)
streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss)
streaming_interval 1..16
=================== =============================
What: /config/usb-gadget/gadget/functions/uvc.name/control
Date: Dec 2014
@ -13,8 +15,11 @@ KernelVersion: 4.0
Description: Control descriptors
All attributes read only:
bInterfaceNumber - USB interface number for this
streaming interface
================ =============================
bInterfaceNumber USB interface number for this
streaming interface
================ =============================
What: /config/usb-gadget/gadget/functions/uvc.name/control/class
Date: Dec 2014
@ -47,13 +52,16 @@ KernelVersion: 4.0
Description: Default output terminal descriptors
All attributes read only:
iTerminal - index of string descriptor
bSourceID - id of the terminal to which this terminal
============== =============================================
iTerminal index of string descriptor
bSourceID id of the terminal to which this terminal
is connected
bAssocTerminal - id of the input terminal to which this output
bAssocTerminal id of the input terminal to which this output
terminal is associated
wTerminalType - terminal type
bTerminalID - a non-zero id of this terminal
wTerminalType terminal type
bTerminalID a non-zero id of this terminal
============== =============================================
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera
Date: Dec 2014
@ -66,16 +74,19 @@ KernelVersion: 4.0
Description: Default camera terminal descriptors
All attributes read only:
bmControls - bitmap specifying which controls are
supported for the video stream
wOcularFocalLength - the value of Locular
wObjectiveFocalLengthMax- the value of Lmin
wObjectiveFocalLengthMin- the value of Lmax
iTerminal - index of string descriptor
bAssocTerminal - id of the output terminal to which
this terminal is connected
wTerminalType - terminal type
bTerminalID - a non-zero id of this terminal
======================== ====================================
bmControls bitmap specifying which controls are
supported for the video stream
wOcularFocalLength the value of Locular
wObjectiveFocalLengthMax the value of Lmin
wObjectiveFocalLengthMin the value of Lmax
iTerminal index of string descriptor
bAssocTerminal id of the output terminal to which
this terminal is connected
wTerminalType terminal type
bTerminalID a non-zero id of this terminal
======================== ====================================
What: /config/usb-gadget/gadget/functions/uvc.name/control/processing
Date: Dec 2014
@ -88,13 +99,16 @@ KernelVersion: 4.0
Description: Default processing unit descriptors
All attributes read only:
iProcessing - index of string descriptor
bmControls - bitmap specifying which controls are
=============== ========================================
iProcessing index of string descriptor
bmControls bitmap specifying which controls are
supported for the video stream
wMaxMultiplier - maximum digital magnification x100
bSourceID - id of the terminal to which this unit is
wMaxMultiplier maximum digital magnification x100
bSourceID id of the terminal to which this unit is
connected
bUnitID - a non-zero id of this unit
bUnitID a non-zero id of this unit
=============== ========================================
What: /config/usb-gadget/gadget/functions/uvc.name/control/header
Date: Dec 2014
@ -114,8 +128,11 @@ KernelVersion: 4.0
Description: Streaming descriptors
All attributes read only:
bInterfaceNumber - USB interface number for this
streaming interface
================ =============================
bInterfaceNumber USB interface number for this
streaming interface
================ =============================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class
Date: Dec 2014
@ -148,13 +165,16 @@ KernelVersion: 4.0
Description: Default color matching descriptors
All attributes read only:
bMatrixCoefficients - matrix used to compute luma and
chroma values from the color primaries
bTransferCharacteristics- optoelectronic transfer
characteristic of the source picutre,
also called the gamma function
bColorPrimaries - color primaries and the reference
white
======================== ======================================
bMatrixCoefficients matrix used to compute luma and
chroma values from the color primaries
bTransferCharacteristics optoelectronic transfer
characteristic of the source picutre,
also called the gamma function
bColorPrimaries color primaries and the reference
white
======================== ======================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg
Date: Dec 2014
@ -168,47 +188,52 @@ Description: Specific MJPEG format descriptors
All attributes read only,
except bmaControls and bDefaultFrameIndex:
bFormatIndex - unique id for this format descriptor;
=================== =====================================
bFormatIndex unique id for this format descriptor;
only defined after parent header is
linked into the streaming class;
read-only
bmaControls - this format's data for bmaControls in
bmaControls this format's data for bmaControls in
the streaming header
bmInterfaceFlags - specifies interlace information,
bmInterfaceFlags specifies interlace information,
read-only
bAspectRatioY - the X dimension of the picture aspect
bAspectRatioY the X dimension of the picture aspect
ratio, read-only
bAspectRatioX - the Y dimension of the picture aspect
bAspectRatioX the Y dimension of the picture aspect
ratio, read-only
bmFlags - characteristics of this format,
bmFlags characteristics of this format,
read-only
bDefaultFrameIndex - optimum frame index for this stream
bDefaultFrameIndex optimum frame index for this stream
=================== =====================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific MJPEG frame descriptors
bFrameIndex - unique id for this framedescriptor;
only defined after parent format is
linked into the streaming header;
read-only
dwFrameInterval - indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval - the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize- the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate - the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate - the minimum bit rate at the longest
frame interval in bps
wHeight - height of decoded bitmap frame in px
wWidth - width of decoded bitmam frame in px
bmCapabilities - still image support, fixed frame-rate
support
========================= =====================================
bFrameIndex unique id for this framedescriptor;
only defined after parent format is
linked into the streaming header;
read-only
dwFrameInterval indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate the minimum bit rate at the longest
frame interval in bps
wHeight height of decoded bitmap frame in px
wWidth width of decoded bitmam frame in px
bmCapabilities still image support, fixed frame-rate
support
========================= =====================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed
Date: Dec 2014
@ -220,50 +245,54 @@ Date: Dec 2014
KernelVersion: 4.0
Description: Specific uncompressed format descriptors
bFormatIndex - unique id for this format descriptor;
================== =======================================
bFormatIndex unique id for this format descriptor;
only defined after parent header is
linked into the streaming class;
read-only
bmaControls - this format's data for bmaControls in
bmaControls this format's data for bmaControls in
the streaming header
bmInterfaceFlags - specifies interlace information,
bmInterfaceFlags specifies interlace information,
read-only
bAspectRatioY - the X dimension of the picture aspect
bAspectRatioY the X dimension of the picture aspect
ratio, read-only
bAspectRatioX - the Y dimension of the picture aspect
bAspectRatioX the Y dimension of the picture aspect
ratio, read-only
bDefaultFrameIndex - optimum frame index for this stream
bBitsPerPixel - number of bits per pixel used to
bDefaultFrameIndex optimum frame index for this stream
bBitsPerPixel number of bits per pixel used to
specify color in the decoded video
frame
guidFormat - globally unique id used to identify
guidFormat globally unique id used to identify
stream-encoding format
================== =======================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name
Date: Dec 2014
KernelVersion: 4.0
Description: Specific uncompressed frame descriptors
bFrameIndex - unique id for this framedescriptor;
only defined after parent format is
linked into the streaming header;
read-only
dwFrameInterval - indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval - the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize- the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate - the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate - the minimum bit rate at the longest
frame interval in bps
wHeight - height of decoded bitmap frame in px
wWidth - width of decoded bitmam frame in px
bmCapabilities - still image support, fixed frame-rate
support
========================= =====================================
bFrameIndex unique id for this framedescriptor;
only defined after parent format is
linked into the streaming header;
read-only
dwFrameInterval indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate the minimum bit rate at the longest
frame interval in bps
wHeight height of decoded bitmap frame in px
wWidth width of decoded bitmam frame in px
bmCapabilities still image support, fixed frame-rate
support
========================= =====================================
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header
Date: Dec 2014
@ -276,17 +305,20 @@ KernelVersion: 4.0
Description: Specific streaming header descriptors
All attributes read only:
bTriggerUsage - how the host software will respond to
==================== =====================================
bTriggerUsage how the host software will respond to
a hardware trigger interrupt event
bTriggerSupport - flag specifying if hardware
bTriggerSupport flag specifying if hardware
triggering is supported
bStillCaptureMethod - method of still image caputre
bStillCaptureMethod method of still image caputre
supported
bTerminalLink - id of the output terminal to which
bTerminalLink id of the output terminal to which
the video endpoint of this interface
is connected
bmInfo - capabilities of this video streaming
bmInfo capabilities of this video streaming
interface
==================== =====================================
What: /sys/class/udc/udc.name/device/gadget/video4linux/video.name/function_name
Date: May 2018

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Documentation/ABI/testing/debugfs-cec-error-inj
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@ -23,7 +23,7 @@ error injections without having to know the details of the driver-specific
commands.
Note that the output of 'error-inj' shall be valid as input to 'error-inj'.
So this must work:
So this must work::
$ cat error-inj >einj.txt
$ cat einj.txt >error-inj

12
Documentation/ABI/testing/debugfs-driver-habanalabs
View File

@ -20,9 +20,13 @@ Description: Allow the root user to disable/enable in runtime the clock
The user can supply a bitmask value, each bit represents
a different engine to disable/enable its clock gating feature.
The bitmask is composed of 20 bits:
0 - 7 : DMA channels
8 - 11 : MME engines
12 - 19 : TPC engines
======= ============
0 - 7 DMA channels
8 - 11 MME engines
12 - 19 TPC engines
======= ============
The bit's location of a specific engine can be determined
using (1 << GAUDI_ENGINE_ID_*). GAUDI_ENGINE_ID_* values
are defined in uapi habanalabs.h file in enum gaudi_engine_id
@ -59,6 +63,7 @@ Description: Allows the root user to read or write directly through the
the generic Linux user-space PCI mapping) because the DDR bar
is very small compared to the DDR memory and only the driver can
move the bar before and after the transaction.
If the IOMMU is disabled, it also allows the root user to read
or write from the host a device VA of a host mapped memory
@ -73,6 +78,7 @@ Description: Allows the root user to read or write 64 bit data directly
the generic Linux user-space PCI mapping) because the DDR bar
is very small compared to the DDR memory and only the driver can
move the bar before and after the transaction.
If the IOMMU is disabled, it also allows the root user to read
or write from the host a device VA of a host mapped memory

11
Documentation/ABI/testing/debugfs-ec
View File

@ -6,7 +6,7 @@ Description:
General information like which GPE is assigned to the EC and whether
the global lock should get used.
Knowing the EC GPE one can watch the amount of HW events related to
the EC here (XY -> GPE number from /sys/kernel/debug/ec/*/gpe):
the EC here (XY -> GPE number from `/sys/kernel/debug/ec/*/gpe`):
/sys/firmware/acpi/interrupts/gpeXY
The io file is binary and a userspace tool located here:
@ -14,7 +14,8 @@ ftp://ftp.suse.com/pub/people/trenn/sources/ec/
should get used to read out the 256 Embedded Controller registers
or writing to them.
CAUTION: Do not write to the Embedded Controller if you don't know
what you are doing! Rebooting afterwards also is a good idea.
This can influence the way your machine is cooled and fans may
not get switched on again after you did a wrong write.
CAUTION:
Do not write to the Embedded Controller if you don't know
what you are doing! Rebooting afterwards also is a good idea.
This can influence the way your machine is cooled and fans may
not get switched on again after you did a wrong write.

30
Documentation/ABI/testing/debugfs-moxtet
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@ -2,13 +2,19 @@ What: /sys/kernel/debug/moxtet/input
Date: March 2019
KernelVersion: 5.3
Contact: Marek Behún <marek.behun@nic.cz>
Description: (R) Read input from the shift registers, in hexadecimal.
Description: (Read) Read input from the shift registers, in hexadecimal.
Returns N+1 bytes, where N is the number of Moxtet connected
modules. The first byte is from the CPU board itself.
Example: 101214
10: CPU board with SD card
12: 2 = PCIe module, 1 = IRQ not active
14: 4 = Peridot module, 1 = IRQ not active
Example::
101214
== =======================================
10 CPU board with SD card
12 2 = PCIe module, 1 = IRQ not active
14 4 = Peridot module, 1 = IRQ not active
== =======================================
What: /sys/kernel/debug/moxtet/output
Date: March 2019
@ -17,7 +23,13 @@ Contact: Marek Behún <marek.behun@nic.cz>
Description: (RW) Read last written value to the shift registers, in
hexadecimal, or write values to the shift registers, also
in hexadecimal.
Example: 0102
01: 01 was last written, or is to be written, to the
first module's shift register
02: the same for second module
Example::
0102
== ================================================
01 01 was last written, or is to be written, to the
first module's shift register
02 the same for second module
== ================================================

28
Documentation/ABI/testing/debugfs-pfo-nx-crypto
View File

@ -4,42 +4,42 @@ KernelVersion: 3.4
Contact: Kent Yoder <key@linux.vnet.ibm.com>
Description:
These debugfs interfaces are built by the nx-crypto driver, built in
These debugfs interfaces are built by the nx-crypto driver, built in
arch/powerpc/crypto/nx.
Error Detection
===============
errors:
- A u32 providing a total count of errors since the driver was loaded. The
only errors counted here are those returned from the hcall, H_COP_OP.
A u32 providing a total count of errors since the driver was loaded. The
only errors counted here are those returned from the hcall, H_COP_OP.
last_error:
- The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
recorded here (the hcall will retry until -EBUSY goes away).
The most recent non-zero return code from the H_COP_OP hcall. -EBUSY is not
recorded here (the hcall will retry until -EBUSY goes away).
last_error_pid:
- The process ID of the process who received the most recent error from the
hcall.
The process ID of the process who received the most recent error from the
hcall.
Device Use
==========
aes_bytes:
- The total number of bytes encrypted using AES in any of the driver's
supported modes.
The total number of bytes encrypted using AES in any of the driver's
supported modes.
aes_ops:
- The total number of AES operations submitted to the hardware.
The total number of AES operations submitted to the hardware.
sha256_bytes:
- The total number of bytes hashed by the hardware using SHA-256.
The total number of bytes hashed by the hardware using SHA-256.
sha256_ops:
- The total number of SHA-256 operations submitted to the hardware.
The total number of SHA-256 operations submitted to the hardware.
sha512_bytes:
- The total number of bytes hashed by the hardware using SHA-512.
The total number of bytes hashed by the hardware using SHA-512.
sha512_ops:
- The total number of SHA-512 operations submitted to the hardware.
The total number of SHA-512 operations submitted to the hardware.

13
Documentation/ABI/testing/debugfs-pktcdvd
View File

@ -4,16 +4,15 @@ KernelVersion: 2.6.20
Contact: Thomas Maier <balagi@justmail.de>
Description:
debugfs interface
-----------------
The pktcdvd module (packet writing driver) creates
these files in debugfs:
/sys/kernel/debug/pktcdvd/pktcdvd[0-7]/
info (0444) Lots of driver statistics and infos.
Example:
-------
==== ====== ====================================
info 0444 Lots of driver statistics and infos.
==== ====== ====================================
cat /sys/kernel/debug/pktcdvd/pktcdvd0/info
Example::
cat /sys/kernel/debug/pktcdvd/pktcdvd0/info

15
Documentation/ABI/testing/debugfs-turris-mox-rwtm
View File

@ -2,8 +2,13 @@ What: /sys/kernel/debug/turris-mox-rwtm/do_sign
Date: Jun 2020
KernelVersion: 5.8
Contact: Marek Behún <marek.behun@nic.cz>
Description: (W) Message to sign with the ECDSA private key stored in
device's OTP. The message must be exactly 64 bytes (since
this is intended for SHA-512 hashes).
(R) The resulting signature, 136 bytes. This contains the R and
S values of the ECDSA signature, both in big-endian format.
Description:
======= ===========================================================
(Write) Message to sign with the ECDSA private key stored in
device's OTP. The message must be exactly 64 bytes
(since this is intended for SHA-512 hashes).
(Read) The resulting signature, 136 bytes. This contains the
R and S values of the ECDSA signature, both in
big-endian format.
======= ===========================================================

21
Documentation/ABI/testing/debugfs-wilco-ec
View File

@ -27,16 +27,17 @@ Description:
for writing, two for the type and at least a single byte of
data.
Example:
// Request EC info type 3 (EC firmware build date)
// Corresponds with sending type 0x00f0 with
// MBOX = [38, 00, 03, 00]
$ echo 00 f0 38 00 03 00 > /sys/kernel/debug/wilco_ec/raw
// View the result. The decoded ASCII result "12/21/18" is
// included after the raw hex.
// Corresponds with MBOX = [00, 00, 31, 32, 2f, 32, 31, 38, ...]
$ cat /sys/kernel/debug/wilco_ec/raw
00 00 31 32 2f 32 31 2f 31 38 00 38 00 01 00 2f 00 ..12/21/18.8...
Example::
// Request EC info type 3 (EC firmware build date)
// Corresponds with sending type 0x00f0 with
// MBOX = [38, 00, 03, 00]
$ echo 00 f0 38 00 03 00 > /sys/kernel/debug/wilco_ec/raw
// View the result. The decoded ASCII result "12/21/18" is
// included after the raw hex.
// Corresponds with MBOX = [00, 00, 31, 32, 2f, 32, 31, 38, ...]
$ cat /sys/kernel/debug/wilco_ec/raw
00 00 31 32 2f 32 31 2f 31 38 00 38 00 01 00 2f 00 ..12/21/18.8...
Note that the first 16 bytes of the received MBOX[] will be
printed, even if some of the data is junk, and skipping bytes

32
Documentation/ABI/testing/dell-smbios-wmi
View File

@ -10,29 +10,29 @@ Description:
<uapi/linux/wmi.h>
1) To perform an SMBIOS call from userspace, you'll need to
first determine the minimum size of the calling interface
buffer for your machine.
Platforms that contain larger buffers can return larger
objects from the system firmware.
Commonly this size is either 4k or 32k.
first determine the minimum size of the calling interface
buffer for your machine.
Platforms that contain larger buffers can return larger
objects from the system firmware.
Commonly this size is either 4k or 32k.
To determine the size of the buffer read() a u64 dword from
the WMI character device /dev/wmi/dell-smbios.
To determine the size of the buffer read() a u64 dword from
the WMI character device /dev/wmi/dell-smbios.
2) After you've determined the minimum size of the calling
interface buffer, you can allocate a structure that represents
the structure documented above.
interface buffer, you can allocate a structure that represents
the structure documented above.
3) In the 'length' object store the size of the buffer you
determined above and allocated.
determined above and allocated.
4) In this buffer object, prepare as necessary for the SMBIOS
call you're interested in. Typically SMBIOS buffers have
"class", "select", and "input" defined to values that coincide
with the data you are interested in.
Documenting class/select/input values is outside of the scope
of this documentation. Check with the libsmbios project for
further documentation on these values.
call you're interested in. Typically SMBIOS buffers have
"class", "select", and "input" defined to values that coincide
with the data you are interested in.
Documenting class/select/input values is outside of the scope
of this documentation. Check with the libsmbios project for
further documentation on these values.
6) Run the call by using ioctl() as described in the header.

27
Documentation/ABI/testing/dev-kmsg
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@ -6,6 +6,7 @@ Description: The /dev/kmsg character device node provides userspace access
to the kernel's printk buffer.
Injecting messages:
Every write() to the opened device node places a log entry in
the kernel's printk buffer.
@ -21,6 +22,7 @@ Description: The /dev/kmsg character device node provides userspace access
the messages can always be reliably determined.
Accessing the buffer:
Every read() from the opened device node receives one record
of the kernel's printk buffer.
@ -48,6 +50,7 @@ Description: The /dev/kmsg character device node provides userspace access
if needed, without limiting the interface to a single reader.
The device supports seek with the following parameters:
SEEK_SET, 0
seek to the first entry in the buffer
SEEK_END, 0
@ -87,18 +90,22 @@ Description: The /dev/kmsg character device node provides userspace access
readable context of the message, for reliable processing in
userspace.
Example:
7,160,424069,-;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored)
SUBSYSTEM=acpi
DEVICE=+acpi:PNP0A03:00
6,339,5140900,-;NET: Registered protocol family 10
30,340,5690716,-;udevd[80]: starting version 181
Example::
7,160,424069,-;pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7] (ignored)
SUBSYSTEM=acpi
DEVICE=+acpi:PNP0A03:00
6,339,5140900,-;NET: Registered protocol family 10
30,340,5690716,-;udevd[80]: starting version 181
The DEVICE= key uniquely identifies devices the following way:
b12:8 - block dev_t
c127:3 - char dev_t
n8 - netdev ifindex
+sound:card0 - subsystem:devname
============ =================
b12:8 block dev_t
c127:3 char dev_t
n8 netdev ifindex
+sound:card0 subsystem:devname
============ =================
The flags field carries '-' by default. A 'c' indicates a
fragment of a line. Note, that these hints about continuation

17
Documentation/ABI/testing/evm
View File

@ -17,26 +17,33 @@ Description:
echoing a value to <securityfs>/evm made up of the
following bits:
=== ==================================================
Bit Effect
=== ==================================================
0 Enable HMAC validation and creation
1 Enable digital signature validation
2 Permit modification of EVM-protected metadata at
runtime. Not supported if HMAC validation and
creation is enabled.
31 Disable further runtime modification of EVM policy
=== ==================================================
For example:
For example::
echo 1 ><securityfs>/evm
echo 1 ><securityfs>/evm
will enable HMAC validation and creation
echo 0x80000003 ><securityfs>/evm
::
echo 0x80000003 ><securityfs>/evm
will enable HMAC and digital signature validation and
HMAC creation and disable all further modification of policy.
echo 0x80000006 ><securityfs>/evm
::
echo 0x80000006 ><securityfs>/evm
will enable digital signature validation, permit
modification of EVM-protected metadata and
@ -65,7 +72,7 @@ Description:
Shows the set of extended attributes used to calculate or
validate the EVM signature, and allows additional attributes
to be added at runtime. Any signatures generated after
additional attributes are added (and on files posessing those
additional attributes are added (and on files possessing those
additional attributes) will only be valid if the same
additional attributes are configured on system boot. Writing
a single period (.) will lock the xattr list from any further

13
Documentation/ABI/testing/gpio-cdev
View File

@ -12,15 +12,16 @@ Description:
The following file operations are supported:
open(2)
Currently the only useful flags are O_RDWR.
Currently the only useful flags are O_RDWR.
ioctl(2)
Initiate various actions.
See the inline documentation in [include/uapi]<linux/gpio.h>
for descriptions of all ioctls.
Initiate various actions.
See the inline documentation in [include/uapi]<linux/gpio.h>
for descriptions of all ioctls.
close(2)
Stops and free up the I/O contexts that was associated
with the file descriptor.
Stops and free up the I/O contexts that was associated
with the file descriptor.
Users: TBD

30
Documentation/ABI/testing/ima_policy
View File

@ -15,19 +15,22 @@ Description:
IMA appraisal, if configured, uses these file measurements
for local measurement appraisal.
rule format: action [condition ...]
::
action: measure | dont_measure | appraise | dont_appraise |
audit | hash | dont_hash
condition:= base | lsm [option]
rule format: action [condition ...]
action: measure | dont_measure | appraise | dont_appraise |
audit | hash | dont_hash
condition:= base | lsm [option]
base: [[func=] [mask=] [fsmagic=] [fsuuid=] [uid=]
[euid=] [fowner=] [fsname=]]
lsm: [[subj_user=] [subj_role=] [subj_type=]
[obj_user=] [obj_role=] [obj_type=]]
option: [[appraise_type=]] [template=] [permit_directio]
[appraise_flag=] [keyrings=]
base: func:= [BPRM_CHECK][MMAP_CHECK][CREDS_CHECK][FILE_CHECK][MODULE_CHECK]
[FIRMWARE_CHECK]
base:
func:= [BPRM_CHECK][MMAP_CHECK][CREDS_CHECK][FILE_CHECK]MODULE_CHECK]
[FIRMWARE_CHECK]
[KEXEC_KERNEL_CHECK] [KEXEC_INITRAMFS_CHECK]
[KEXEC_CMDLINE] [KEY_CHECK]
mask:= [[^]MAY_READ] [[^]MAY_WRITE] [[^]MAY_APPEND]
@ -37,8 +40,9 @@ Description:
uid:= decimal value
euid:= decimal value
fowner:= decimal value
lsm: are LSM specific
option: appraise_type:= [imasig] [imasig|modsig]
lsm: are LSM specific
option:
appraise_type:= [imasig] [imasig|modsig]
appraise_flag:= [check_blacklist]
Currently, blacklist check is only for files signed with appended
signature.
@ -49,7 +53,7 @@ Description:
(eg, ima-ng). Only valid when action is "measure".
pcr:= decimal value
default policy:
default policy:
# PROC_SUPER_MAGIC
dont_measure fsmagic=0x9fa0
dont_appraise fsmagic=0x9fa0
@ -97,7 +101,8 @@ Description:
Examples of LSM specific definitions:
SELinux:
SELinux::
dont_measure obj_type=var_log_t
dont_appraise obj_type=var_log_t
dont_measure obj_type=auditd_log_t
@ -105,10 +110,11 @@ Description:
measure subj_user=system_u func=FILE_CHECK mask=MAY_READ
measure subj_role=system_r func=FILE_CHECK mask=MAY_READ
Smack:
Smack::
measure subj_user=_ func=FILE_CHECK mask=MAY_READ
Example of measure rules using alternate PCRs:
Example of measure rules using alternate PCRs::
measure func=KEXEC_KERNEL_CHECK pcr=4
measure func=KEXEC_INITRAMFS_CHECK pcr=5

46
Documentation/ABI/testing/procfs-diskstats
View File

@ -6,32 +6,38 @@ Description:
of block devices. Each line contains the following 14
fields:
1 - major number
2 - minor mumber
3 - device name
4 - reads completed successfully
5 - reads merged
6 - sectors read
7 - time spent reading (ms)
8 - writes completed
9 - writes merged
10 - sectors written
11 - time spent writing (ms)
12 - I/Os currently in progress
13 - time spent doing I/Os (ms)
14 - weighted time spent doing I/Os (ms)
== ===================================
1 major number
2 minor mumber
3 device name
4 reads completed successfully
5 reads merged
6 sectors read
7 time spent reading (ms)
8 writes completed
9 writes merged
10 sectors written
11 time spent writing (ms)
12 I/Os currently in progress
13 time spent doing I/Os (ms)
14 weighted time spent doing I/Os (ms)
== ===================================
Kernel 4.18+ appends four more fields for discard
tracking putting the total at 18:
15 - discards completed successfully
16 - discards merged
17 - sectors discarded
18 - time spent discarding
== ===================================
15 discards completed successfully
16 discards merged
17 sectors discarded
18 time spent discarding
== ===================================
Kernel 5.5+ appends two more fields for flush requests:
19 - flush requests completed successfully
20 - time spent flushing
== =====================================
19 flush requests completed successfully
20 time spent flushing
== =====================================
For more details refer to Documentation/admin-guide/iostats.rst

48
Documentation/ABI/testing/procfs-smaps_rollup
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@ -14,28 +14,28 @@ Description:
For more details, see Documentation/filesystems/proc.rst
and the procfs man page.
Typical output looks like this:
Typical output looks like this::
00100000-ff709000 ---p 00000000 00:00 0 [rollup]
Size: 1192 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 884 kB
Pss: 385 kB
Pss_Anon: 301 kB
Pss_File: 80 kB
Pss_Shmem: 4 kB
Shared_Clean: 696 kB
Shared_Dirty: 0 kB
Private_Clean: 120 kB
Private_Dirty: 68 kB
Referenced: 884 kB
Anonymous: 68 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 385 kB
00100000-ff709000 ---p 00000000 00:00 0 [rollup]
Size: 1192 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Rss: 884 kB
Pss: 385 kB
Pss_Anon: 301 kB
Pss_File: 80 kB
Pss_Shmem: 4 kB
Shared_Clean: 696 kB
Shared_Dirty: 0 kB
Private_Clean: 120 kB
Private_Dirty: 68 kB
Referenced: 884 kB
Anonymous: 68 kB
LazyFree: 0 kB
AnonHugePages: 0 kB
ShmemPmdMapped: 0 kB
Shared_Hugetlb: 0 kB
Private_Hugetlb: 0 kB
Swap: 0 kB
SwapPss: 0 kB
Locked: 385 kB

19
Documentation/ABI/testing/pstore
View File

@ -9,25 +9,25 @@ Description: Generic interface to platform dependent persistent storage.
provide a generic interface to show records captured in
the dying moments. In the case of a panic the last part
of the console log is captured, but other interesting
data can also be saved.
data can also be saved::
# mount -t pstore -o kmsg_bytes=8000 - /sys/fs/pstore
# mount -t pstore -o kmsg_bytes=8000 - /sys/fs/pstore
$ ls -l /sys/fs/pstore/
total 0
-r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-erst-1
$ ls -l /sys/fs/pstore/
total 0
-r--r--r-- 1 root root 7896 Nov 30 15:38 dmesg-erst-1
Different users of this interface will result in different
filename prefixes. Currently two are defined:
"dmesg" - saved console log
"mce" - architecture dependent data from fatal h/w error
- "dmesg" - saved console log
- "mce" - architecture dependent data from fatal h/w error
Once the information in a file has been read, removing
the file will signal to the underlying persistent storage
device that it can reclaim the space for later re-use.
device that it can reclaim the space for later re-use::
$ rm /sys/fs/pstore/dmesg-erst-1
$ rm /sys/fs/pstore/dmesg-erst-1
The expectation is that all files in /sys/fs/pstore/
will be saved elsewhere and erased from persistent store
@ -44,4 +44,3 @@ Description: Generic interface to platform dependent persistent storage.
backends are available, the preferred backend may be
set by passing the pstore.backend= argument to the kernel at
boot time.

38
Documentation/ABI/testing/sysfs-block
View File

@ -4,23 +4,27 @@ Contact: Jerome Marchand <jmarchan@redhat.com>
Description:
The /sys/block/<disk>/stat files displays the I/O
statistics of disk <disk>. They contain 11 fields:
1 - reads completed successfully
2 - reads merged
3 - sectors read
4 - time spent reading (ms)
5 - writes completed
6 - writes merged
7 - sectors written
8 - time spent writing (ms)
9 - I/Os currently in progress
10 - time spent doing I/Os (ms)
11 - weighted time spent doing I/Os (ms)
12 - discards completed
13 - discards merged
14 - sectors discarded
15 - time spent discarding (ms)
16 - flush requests completed
17 - time spent flushing (ms)
== ==============================================
1 reads completed successfully
2 reads merged
3 sectors read
4 time spent reading (ms)
5 writes completed
6 writes merged
7 sectors written
8 time spent writing (ms)
9 I/Os currently in progress
10 time spent doing I/Os (ms)
11 weighted time spent doing I/Os (ms)
12 discards completed
13 discards merged
14 sectors discarded
15 time spent discarding (ms)
16 flush requests completed
17 time spent flushing (ms)
== ==============================================
For more details refer Documentation/admin-guide/iostats.rst

2
Documentation/ABI/testing/sysfs-block-device
View File

@ -8,11 +8,13 @@ Description:
It has the following valid values:
== ========================================================
0 OFF - the LED is not activated on activity
1 BLINK_ON - the LED blinks on every 10ms when activity is
detected.
2 BLINK_OFF - the LED is on when idle, and blinks off
every 10ms when activity is detected.
== ========================================================
Note that the user must turn sw_activity OFF it they wish to
control the activity LED via the em_message file.

4
Documentation/ABI/testing/sysfs-block-rnbd
View File

@ -9,9 +9,9 @@ Description: To unmap a volume, "normal" or "force" has to be written to:
is using the device. When "force" is used, the device is also unmapped
when device is in use. All I/Os that are in progress will fail.
Example:
Example::
# echo "normal" > /sys/block/rnbd0/rnbd/unmap_device
# echo "normal" > /sys/block/rnbd0/rnbd/unmap_device
What: /sys/block/rnbd<N>/rnbd/state
Date: Feb 2020

19
Documentation/ABI/testing/sysfs-bus-acpi
View File

@ -5,6 +5,7 @@ Description:
This attribute indicates the full path of ACPI namespace
object associated with the device object. For example,
\_SB_.PCI0.
This file is not present for device objects representing
fixed ACPI hardware features (like power and sleep
buttons).
@ -67,14 +68,16 @@ Description:
The return value is a decimal integer representing the device's
status bitmap:
Bit [0] – Set if the device is present.
Bit [1] – Set if the device is enabled and decoding its
resources.
Bit [2] – Set if the device should be shown in the UI.
Bit [3] – Set if the device is functioning properly (cleared if
device failed its diagnostics).
Bit [4] – Set if the battery is present.
Bits [31:5] – Reserved (must be cleared)
=========== ==================================================
Bit [0] Set if the device is present.
Bit [1] Set if the device is enabled and decoding its
resources.
Bit [2] Set if the device should be shown in the UI.
Bit [3] Set if the device is functioning properly (cleared
if device failed its diagnostics).
Bit [4] Set if the battery is present.
Bits [31:5] Reserved (must be cleared)
=========== ==================================================
If bit [0] is clear, then bit 1 must also be clear (a device
that is not present cannot be enabled).

60
Documentation/ABI/testing/sysfs-bus-coresight-devices-cti
View File

@ -8,50 +8,50 @@ What: /sys/bus/coresight/devices/<cti-name>/powered
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Indicate if the CTI hardware is powered.
Description: (Read) Indicate if the CTI hardware is powered.
What: /sys/bus/coresight/devices/<cti-name>/ctmid
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Display the associated CTM ID
Description: (Read) Display the associated CTM ID
What: /sys/bus/coresight/devices/<cti-name>/nr_trigger_cons
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Number of devices connected to triggers on this CTI
Description: (Read) Number of devices connected to triggers on this CTI
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/name
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Name of connected device <N>
Description: (Read) Name of connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/in_signals
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Input trigger signals from connected device <N>
Description: (Read) Input trigger signals from connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/in_types
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Functional types for the input trigger signals
Description: (Read) Functional types for the input trigger signals
from connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/out_signals
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Output trigger signals to connected device <N>
Description: (Read) Output trigger signals to connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/out_types
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Functional types for the output trigger signals
Description: (Read) Functional types for the output trigger signals
to connected device <N>
What: /sys/bus/coresight/devices/<cti-name>/regs/inout_sel
@ -88,7 +88,7 @@ What: /sys/bus/coresight/devices/<cti-name>/regs/intack
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Write the INTACK register.
Description: (Write) Write the INTACK register.
What: /sys/bus/coresight/devices/<cti-name>/regs/appset
Date: March 2020
@ -101,99 +101,99 @@ What: /sys/bus/coresight/devices/<cti-name>/regs/appclear
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Write APPCLEAR register to deactivate channel.
Description: (Write) Write APPCLEAR register to deactivate channel.
What: /sys/bus/coresight/devices/<cti-name>/regs/apppulse
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Write APPPULSE to pulse a channel active for one clock
Description: (Write) Write APPPULSE to pulse a channel active for one clock
cycle.
What: /sys/bus/coresight/devices/<cti-name>/regs/chinstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Read current status of channel inputs.
Description: (Read) Read current status of channel inputs.
What: /sys/bus/coresight/devices/<cti-name>/regs/choutstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) read current status of channel outputs.
Description: (Read) read current status of channel outputs.
What: /sys/bus/coresight/devices/<cti-name>/regs/triginstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) read current status of input trigger signals
Description: (Read) read current status of input trigger signals
What: /sys/bus/coresight/devices/<cti-name>/regs/trigoutstatus
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) read current status of output trigger signals.
Description: (Read) read current status of output trigger signals.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigin_attach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Attach a CTI input trigger to a CTM channel.
Description: (Write) Attach a CTI input trigger to a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigin_detach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Detach a CTI input trigger from a CTM channel.
Description: (Write) Detach a CTI input trigger from a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_attach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Attach a CTI output trigger to a CTM channel.
Description: (Write) Attach a CTI output trigger to a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_detach
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Detach a CTI output trigger from a CTM channel.
Description: (Write) Detach a CTI output trigger from a CTM channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_gate_enable
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (RW) Enable CTIGATE for single channel (W) or list enabled
Description: (RW) Enable CTIGATE for single channel (Write) or list enabled
channels through the gate (R).
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_gate_disable
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Disable CTIGATE for single channel.
Description: (Write) Disable CTIGATE for single channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_set
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Activate a single channel.
Description: (Write) Activate a single channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_clear
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Deactivate a single channel.
Description: (Write) Deactivate a single channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_pulse
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Pulse a single channel - activate for a single clock cycle.
Description: (Write) Pulse a single channel - activate for a single clock cycle.
What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_filtered
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) List of output triggers filtered across all connections.
Description: (Read) List of output triggers filtered across all connections.
What: /sys/bus/coresight/devices/<cti-name>/channels/trig_filter_enable
Date: March 2020
@ -205,13 +205,13 @@ What: /sys/bus/coresight/devices/<cti-name>/channels/chan_inuse
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) show channels with at least one attached trigger signal.
Description: (Read) show channels with at least one attached trigger signal.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_free
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) show channels with no attached trigger signals.
Description: (Read) show channels with no attached trigger signals.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_sel
Date: March 2020
@ -224,18 +224,18 @@ What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_in
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Read to see input triggers connected to selected view
Description: (Read) Read to see input triggers connected to selected view
channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_out
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (R) Read to see output triggers connected to selected view
Description: (Read) Read to see output triggers connected to selected view
channel.
What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_reset
Date: March 2020
KernelVersion 5.7
Contact: Mike Leach or Mathieu Poirier
Description: (W) Clear all channel / trigger programming.
Description: (Write) Clear all channel / trigger programming.

21
Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10
View File

@ -4,7 +4,10 @@ KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (RW) Add/remove a sink from a trace path. There can be multiple
source for a single sink.
ex: echo 1 > /sys/bus/coresight/devices/20010000.etb/enable_sink
ex::
echo 1 > /sys/bus/coresight/devices/20010000.etb/enable_sink
What: /sys/bus/coresight/devices/<memory_map>.etb/trigger_cntr
Date: November 2014
@ -20,21 +23,21 @@ What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rdp
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Defines the depth, in words, of the trace RAM in powers of
Description: (Read) Defines the depth, in words, of the trace RAM in powers of
2. The value is read directly from HW register RDP, 0x004.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/sts
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the ETB status register. The value
Description: (Read) Shows the value held by the ETB status register. The value
is read directly from HW register STS, 0x00C.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rrp
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the ETB RAM Read Pointer register
Description: (Read) Shows the value held by the ETB RAM Read Pointer register
that is used to read entries from the Trace RAM over the APB
interface. The value is read directly from HW register RRP,
0x014.
@ -43,7 +46,7 @@ What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rwp
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the ETB RAM Write Pointer register
Description: (Read) Shows the value held by the ETB RAM Write Pointer register
that is used to sets the write pointer to write entries from
the CoreSight bus into the Trace RAM. The value is read directly
from HW register RWP, 0x018.
@ -52,21 +55,21 @@ What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/trg
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Similar to "trigger_cntr" above except that this value is
Description: (Read) Similar to "trigger_cntr" above except that this value is
read directly from HW register TRG, 0x01C.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ctl
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the ETB Control register. The value
Description: (Read) Shows the value held by the ETB Control register. The value
is read directly from HW register CTL, 0x020.
What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ffsr
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the ETB Formatter and Flush Status
Description: (Read) Shows the value held by the ETB Formatter and Flush Status
register. The value is read directly from HW register FFSR,
0x300.
@ -74,6 +77,6 @@ What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ffcr
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the ETB Formatter and Flush Control
Description: (Read) Shows the value held by the ETB Formatter and Flush Control
register. The value is read directly from HW register FFCR,
0x304.

10
Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x
View File

@ -146,28 +146,28 @@ What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_addr_cmp
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Provides the number of address comparators pairs accessible
Description: (Read) Provides the number of address comparators pairs accessible
on a trace unit, as specified by bit 3:0 of register ETMCCR.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_cntr
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Provides the number of counters accessible on a trace unit,
Description: (Read) Provides the number of counters accessible on a trace unit,
as specified by bit 15:13 of register ETMCCR.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_ctxid_cmp
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Provides the number of context ID comparator available on a
Description: (Read) Provides the number of context ID comparator available on a
trace unit, as specified by bit 25:24 of register ETMCCR.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/reset
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (W) Cancels all configuration on a trace unit and set it back
Description: (Write) Cancels all configuration on a trace unit and set it back
to its boot configuration.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_12_event
@ -216,7 +216,7 @@ What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/curr_seq_state
Date: November 2014
KernelVersion: 3.19
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Holds the current state of the sequencer.
Description: (Read) Holds the current state of the sequencer.
What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/sync_freq
Date: November 2014

76
Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x
View File

@ -12,75 +12,75 @@ What: /sys/bus/coresight/devices/etm<N>/cpu
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) The CPU this tracing entity is associated with.
Description: (Read) The CPU this tracing entity is associated with.
What: /sys/bus/coresight/devices/etm<N>/nr_pe_cmp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of PE comparator inputs that are
Description: (Read) Indicates the number of PE comparator inputs that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_addr_cmp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of address comparator pairs that are
Description: (Read) Indicates the number of address comparator pairs that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_cntr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of counters that are available for
Description: (Read) Indicates the number of counters that are available for
tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_ext_inp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates how many external inputs are implemented.
Description: (Read) Indicates how many external inputs are implemented.
What: /sys/bus/coresight/devices/etm<N>/numcidc
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of Context ID comparators that are
Description: (Read) Indicates the number of Context ID comparators that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/numvmidc
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of VMID comparators that are available
Description: (Read) Indicates the number of VMID comparators that are available
for tracing.
What: /sys/bus/coresight/devices/etm<N>/nrseqstate
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of sequencer states that are
Description: (Read) Indicates the number of sequencer states that are
implemented.
What: /sys/bus/coresight/devices/etm<N>/nr_resource
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of resource selection pairs that are
Description: (Read) Indicates the number of resource selection pairs that are
available for tracing.
What: /sys/bus/coresight/devices/etm<N>/nr_ss_cmp
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the number of single-shot comparator controls that
Description: (Read) Indicates the number of single-shot comparator controls that
are available for tracing.
What: /sys/bus/coresight/devices/etm<N>/reset
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (W) Cancels all configuration on a trace unit and set it back
Description: (Write) Cancels all configuration on a trace unit and set it back
to its boot configuration.
What: /sys/bus/coresight/devices/etm<N>/mode
@ -300,7 +300,7 @@ What: /sys/bus/coresight/devices/etm<N>/addr_cmp_view
Date: December 2019
KernelVersion: 5.5
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the current settings for the selected address
Description: (Read) Print the current settings for the selected address
comparator.
What: /sys/bus/coresight/devices/etm<N>/sshot_idx
@ -319,7 +319,7 @@ What: /sys/bus/coresight/devices/etm<N>/sshot_status
Date: December 2019
KernelVersion: 5.5
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the current value of the selected single shot
Description: (Read) Print the current value of the selected single shot
status register.
What: /sys/bus/coresight/devices/etm<N>/sshot_pe_ctrl
@ -333,111 +333,111 @@ What: /sys/bus/coresight/devices/etm<N>/mgmt/trcoslsr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the OS Lock Status Register (0x304).
Description: (Read) Print the content of the OS Lock Status Register (0x304).
The value it taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpdcr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Power Down Control Register
Description: (Read) Print the content of the Power Down Control Register
(0x310). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpdsr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Power Down Status Register
Description: (Read) Print the content of the Power Down Status Register
(0x314). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trclsr
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the SW Lock Status Register
Description: (Read) Print the content of the SW Lock Status Register
(0xFB4). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcauthstatus
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Authentication Status Register
Description: (Read) Print the content of the Authentication Status Register
(0xFB8). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevid
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Device ID Register
Description: (Read) Print the content of the Device ID Register
(0xFC8). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevtype
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Device Type Register
Description: (Read) Print the content of the Device Type Register
(0xFCC). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr0
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Peripheral ID0 Register
Description: (Read) Print the content of the Peripheral ID0 Register
(0xFE0). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr1
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Peripheral ID1 Register
Description: (Read) Print the content of the Peripheral ID1 Register
(0xFE4). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr2
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Peripheral ID2 Register
Description: (Read) Print the content of the Peripheral ID2 Register
(0xFE8). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcpidr3
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Peripheral ID3 Register
Description: (Read) Print the content of the Peripheral ID3 Register
(0xFEC). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trcconfig
Date: February 2016
KernelVersion: 4.07
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the trace configuration register
Description: (Read) Print the content of the trace configuration register
(0x010) as currently set by SW.
What: /sys/bus/coresight/devices/etm<N>/mgmt/trctraceid
Date: February 2016
KernelVersion: 4.07
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the trace ID register (0x040).
Description: (Read) Print the content of the trace ID register (0x040).
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr0
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the tracing capabilities of the trace unit (0x1E0).
Description: (Read) Returns the tracing capabilities of the trace unit (0x1E0).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr1
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the tracing capabilities of the trace unit (0x1E4).
Description: (Read) Returns the tracing capabilities of the trace unit (0x1E4).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr2
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the maximum size of the data value, data address,
Description: (Read) Returns the maximum size of the data value, data address,
VMID, context ID and instuction address in the trace unit
(0x1E8). The value is taken directly from the HW.
@ -445,7 +445,7 @@ What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr3
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the value associated with various resources
Description: (Read) Returns the value associated with various resources
available to the trace unit. See the Trace Macrocell
architecture specification for more details (0x1E8).
The value is taken directly from the HW.
@ -454,42 +454,42 @@ What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr4
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns how many resources the trace unit supports (0x1F0).
Description: (Read) Returns how many resources the trace unit supports (0x1F0).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr5
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns how many resources the trace unit supports (0x1F4).
Description: (Read) Returns how many resources the trace unit supports (0x1F4).
The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr8
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the maximum speculation depth of the instruction
Description: (Read) Returns the maximum speculation depth of the instruction
trace stream. (0x180). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr9
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the number of P0 right-hand keys that the trace unit
Description: (Read) Returns the number of P0 right-hand keys that the trace unit
can use (0x184). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr10
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the number of P1 right-hand keys that the trace unit
Description: (Read) Returns the number of P1 right-hand keys that the trace unit
can use (0x188). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr11
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the number of special P1 right-hand keys that the
Description: (Read) Returns the number of special P1 right-hand keys that the
trace unit can use (0x18C). The value is taken directly from
the HW.
@ -497,7 +497,7 @@ What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr12
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the number of conditional P1 right-hand keys that
Description: (Read) Returns the number of conditional P1 right-hand keys that
the trace unit can use (0x190). The value is taken directly
from the HW.
@ -505,6 +505,6 @@ What: /sys/bus/coresight/devices/etm<N>/trcidr/trcidr13
Date: April 2015
KernelVersion: 4.01
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Returns the number of special conditional P1 right-hand keys
Description: (Read) Returns the number of special conditional P1 right-hand keys
that the trace unit can use (0x194). The value is taken
directly from the HW.

2
Documentation/ABI/testing/sysfs-bus-coresight-devices-stm
View File

@ -42,7 +42,7 @@ What: /sys/bus/coresight/devices/<memory_map>.stm/status
Date: April 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) List various control and status registers. The specific
Description: (Read) List various control and status registers. The specific
layout and content is driver specific.
What: /sys/bus/coresight/devices/<memory_map>.stm/traceid

20
Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc
View File

@ -11,21 +11,21 @@ What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/rsz
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Defines the size, in 32-bit words, of the local RAM buffer.
Description: (Read) Defines the size, in 32-bit words, of the local RAM buffer.
The value is read directly from HW register RSZ, 0x004.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/sts
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the TMC status register. The value
Description: (Read) Shows the value held by the TMC status register. The value
is read directly from HW register STS, 0x00C.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/rrp
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the TMC RAM Read Pointer register
Description: (Read) Shows the value held by the TMC RAM Read Pointer register
that is used to read entries from the Trace RAM over the APB
interface. The value is read directly from HW register RRP,
0x014.
@ -34,7 +34,7 @@ What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/rwp
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the TMC RAM Write Pointer register
Description: (Read) Shows the value held by the TMC RAM Write Pointer register
that is used to sets the write pointer to write entries from
the CoreSight bus into the Trace RAM. The value is read directly
from HW register RWP, 0x018.
@ -43,21 +43,21 @@ What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/trg
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Similar to "trigger_cntr" above except that this value is
Description: (Read) Similar to "trigger_cntr" above except that this value is
read directly from HW register TRG, 0x01C.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/ctl
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the TMC Control register. The value
Description: (Read) Shows the value held by the TMC Control register. The value
is read directly from HW register CTL, 0x020.
What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/ffsr
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the TMC Formatter and Flush Status
Description: (Read) Shows the value held by the TMC Formatter and Flush Status
register. The value is read directly from HW register FFSR,
0x300.
@ -65,7 +65,7 @@ What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/ffcr
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the TMC Formatter and Flush Control
Description: (Read) Shows the value held by the TMC Formatter and Flush Control
register. The value is read directly from HW register FFCR,
0x304.
@ -73,7 +73,7 @@ What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/mode
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Shows the value held by the TMC Mode register, which
Description: (Read) Shows the value held by the TMC Mode register, which
indicate the mode the device has been configured to enact. The
The value is read directly from the MODE register, 0x028.
@ -81,7 +81,7 @@ What: /sys/bus/coresight/devices/<memory_map>.tmc/mgmt/devid
Date: March 2016
KernelVersion: 4.7
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Indicates the capabilities of the Coresight TMC.
Description: (Read) Indicates the capabilities of the Coresight TMC.
The value is read directly from the DEVID register, 0xFC8,
What: /sys/bus/coresight/devices/<memory_map>.tmc/buffer_size

3
Documentation/ABI/testing/sysfs-bus-css
View File

@ -20,6 +20,7 @@ Contact: Cornelia Huck <cornelia.huck@de.ibm.com>
Description: Contains the ids of the channel paths used by this
subchannel, as reported by the channel subsystem
during subchannel recognition.
Note: This is an I/O-subchannel specific attribute.
Users: s390-tools, HAL
@ -31,6 +32,7 @@ Description: Contains the PIM/PAM/POM values, as reported by the
channel subsystem when last queried by the common I/O
layer (this implies that this attribute is not necessarily
in sync with the values current in the channel subsystem).
Note: This is an I/O-subchannel specific attribute.
Users: s390-tools, HAL
@ -53,6 +55,7 @@ Description: This file allows the driver for a device to be specified. When
opt-out of driver binding using a driver_override name such as
"none". Only a single driver may be specified in the override,
there is no support for parsing delimiters.
Note that unlike the mechanism of the same name for pci, this
file does not allow to override basic matching rules. I.e.,
the driver must still match the subchannel type of the device.

2
Documentation/ABI/testing/sysfs-bus-dfl
View File

@ -4,6 +4,7 @@ KernelVersion: 5.10
Contact: Xu Yilun <yilun.xu@intel.com>
Description: Read-only. It returns type of DFL FIU of the device. Now DFL
supports 2 FIU types, 0 for FME, 1 for PORT.
Format: 0x%x
What: /sys/bus/dfl/devices/dfl_dev.X/feature_id
@ -12,4 +13,5 @@ KernelVersion: 5.10
Contact: Xu Yilun <yilun.xu@intel.com>
Description: Read-only. It returns feature identifier local to its DFL FIU
type.
Format: 0x%x

14
Documentation/ABI/testing/sysfs-bus-event_source-devices-dfl_fme
View File

@ -8,13 +8,13 @@ Description: Read-only. Attribute group to describe the magic bits
Each attribute under this group defines a bit range of the
perf_event_attr.config. All supported attributes are listed
below.
below::
event = "config:0-11" - event ID
evtype = "config:12-15" - event type
portid = "config:16-23" - event source
For example,
For example::
fab_mmio_read = "event=0x06,evtype=0x02,portid=0xff"
@ -40,11 +40,11 @@ Description: Read-only. Attribute group to describe performance monitoring
All supported performance monitoring events are listed below.
Basic events (evtype=0x00)
Basic events (evtype=0x00)::
clock = "event=0x00,evtype=0x00,portid=0xff"
Cache events (evtype=0x01)
Cache events (evtype=0x01)::
cache_read_hit = "event=0x00,evtype=0x01,portid=0xff"
cache_read_miss = "event=0x01,evtype=0x01,portid=0xff"
@ -59,7 +59,7 @@ Description: Read-only. Attribute group to describe performance monitoring
cache_rx_req_stall = "event=0x09,evtype=0x01,portid=0xff"
cache_eviction = "event=0x0a,evtype=0x01,portid=0xff"
Fabric events (evtype=0x02)
Fabric events (evtype=0x02)::
fab_pcie0_read = "event=0x00,evtype=0x02,portid=0xff"
fab_pcie0_write = "event=0x01,evtype=0x02,portid=0xff"
@ -78,7 +78,7 @@ Description: Read-only. Attribute group to describe performance monitoring
fab_port_mmio_read = "event=0x06,evtype=0x02,portid=?"
fab_port_mmio_write = "event=0x07,evtype=0x02,portid=?"
VTD events (evtype=0x03)
VTD events (evtype=0x03)::
vtd_port_read_transaction = "event=0x00,evtype=0x03,portid=?"
vtd_port_write_transaction = "event=0x01,evtype=0x03,portid=?"
@ -88,7 +88,7 @@ Description: Read-only. Attribute group to describe performance monitoring
vtd_port_devtlb_2m_fill = "event=0x05,evtype=0x03,portid=?"
vtd_port_devtlb_1g_fill = "event=0x06,evtype=0x03,portid=?"
VTD SIP events (evtype=0x04)
VTD SIP events (evtype=0x04)::
vtd_sip_iotlb_4k_hit = "event=0x00,evtype=0x04,portid=0xff"
vtd_sip_iotlb_2m_hit = "event=0x01,evtype=0x04,portid=0xff"

3
Documentation/ABI/testing/sysfs-bus-event_source-devices-format
View File

@ -10,7 +10,8 @@ Description:
name/value pairs.
Userspace must be prepared for the possibility that attributes
define overlapping bit ranges. For example:
define overlapping bit ranges. For example::
attr1 = 'config:0-23'
attr2 = 'config:0-7'
attr3 = 'config:12-35'

6
Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7
View File

@ -7,7 +7,7 @@ Description: Read-only. Attribute group to describe the magic bits
Each attribute under this group defines a bit range of the
perf_event_attr.config. All supported attributes are listed
below.
below::
chip = "config:16-31"
core = "config:16-31"
@ -16,9 +16,9 @@ Description: Read-only. Attribute group to describe the magic bits
offset = "config:32-63"
vcpu = "config:16-31"
For example,
For example::
PM_PB_CYC = "domain=1,offset=0x80,chip=?,lpar=0x0"
PM_PB_CYC = "domain=1,offset=0x80,chip=?,lpar=0x0"
In this event, '?' after chip specifies that
this value will be provided by user while running this event.

7
Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci
View File

@ -7,7 +7,7 @@ Description: Read-only. Attribute group to describe the magic bits
Each attribute under this group defines a bit range of the
perf_event_attr.config. All supported attributes are listed
below.
below::
counter_info_version = "config:16-23"
length = "config:24-31"
@ -20,9 +20,9 @@ Description: Read-only. Attribute group to describe the magic bits
secondary_index = "config:0-15"
starting_index = "config:32-63"
For example,
For example::
processor_core_utilization_instructions_completed = "request=0x94,
processor_core_utilization_instructions_completed = "request=0x94,
phys_processor_idx=?,counter_info_version=0x8,
length=8,offset=0x18"
@ -36,6 +36,7 @@ Description:
'0' if the hypervisor is configured to forbid access to event
counters being accumulated by other guests and to physical
domain event counters.
'1' if that access is allowed.
What: /sys/bus/event_source/devices/hv_gpci/interface/ga

68
Documentation/ABI/testing/sysfs-bus-fcoe
View File

@ -3,16 +3,19 @@ Date: August 2012
KernelVersion: TBD
Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org
Description: The FCoE bus. Attributes in this directory are control interfaces.
Attributes:
ctlr_create: 'FCoE Controller' instance creation interface. Writing an
ctlr_create:
'FCoE Controller' instance creation interface. Writing an
<ifname> to this file will allocate and populate sysfs with a
fcoe_ctlr_device (ctlr_X). The user can then configure any
per-port settings and finally write to the fcoe_ctlr_device's
'start' attribute to begin the kernel's discovery and login
process.
ctlr_destroy: 'FCoE Controller' instance removal interface. Writing a
ctlr_destroy:
'FCoE Controller' instance removal interface. Writing a
fcoe_ctlr_device's sysfs name to this file will log the
fcoe_ctlr_device out of the fabric or otherwise connected
FCoE devices. It will also free all kernel memory allocated
@ -32,11 +35,13 @@ Description: 'FCoE Controller' instances on the fcoe bus.
Attributes:
fcf_dev_loss_tmo: Device loss timeout period (see below). Changing
fcf_dev_loss_tmo:
Device loss timeout period (see below). Changing
this value will change the dev_loss_tmo for all
FCFs discovered by this controller.
mode: Display or change the FCoE Controller's mode. Possible
mode:
Display or change the FCoE Controller's mode. Possible
modes are 'Fabric' and 'VN2VN'. If a FCoE Controller
is started in 'Fabric' mode then FIP FCF discovery is
initiated and ultimately a fabric login is attempted.
@ -44,23 +49,30 @@ Attributes:
FIP VN2VN discovery and login is performed. A FCoE
Controller only supports one mode at a time.
enabled: Whether an FCoE controller is enabled or disabled.
enabled:
Whether an FCoE controller is enabled or disabled.
0 if disabled, 1 if enabled. Writing either 0 or 1
to this file will enable or disable the FCoE controller.
lesb/link_fail: Link Error Status Block (LESB) link failure count.
lesb/link_fail:
Link Error Status Block (LESB) link failure count.
lesb/vlink_fail: Link Error Status Block (LESB) virtual link
lesb/vlink_fail:
Link Error Status Block (LESB) virtual link
failure count.
lesb/miss_fka: Link Error Status Block (LESB) missed FCoE
lesb/miss_fka:
Link Error Status Block (LESB) missed FCoE
Initialization Protocol (FIP) Keep-Alives (FKA).
lesb/symb_err: Link Error Status Block (LESB) symbolic error count.
lesb/symb_err:
Link Error Status Block (LESB) symbolic error count.
lesb/err_block: Link Error Status Block (LESB) block error count.
lesb/err_block:
Link Error Status Block (LESB) block error count.
lesb/fcs_error: Link Error Status Block (LESB) Fibre Channel
lesb/fcs_error:
Link Error Status Block (LESB) Fibre Channel
Services error count.
Notes: ctlr_X (global increment starting at 0)
@ -75,31 +87,41 @@ Description: 'FCoE FCF' instances on the fcoe bus. A FCF is a Fibre Channel
Fibre Channel frames into a FC fabric. It can also take
outbound FC frames and pack them in Ethernet packets to
be sent to their destination on the Ethernet segment.
Attributes:
fabric_name: Identifies the fabric that the FCF services.
fabric_name:
Identifies the fabric that the FCF services.
switch_name: Identifies the FCF.
switch_name:
Identifies the FCF.
priority: The switch's priority amongst other FCFs on the same
priority:
The switch's priority amongst other FCFs on the same
fabric.
selected: 1 indicates that the switch has been selected for use;
selected:
1 indicates that the switch has been selected for use;
0 indicates that the switch will not be used.
fc_map: The Fibre Channel MAP
fc_map:
The Fibre Channel MAP
vfid: The Virtual Fabric ID
vfid:
The Virtual Fabric ID
mac: The FCF's MAC address
mac:
The FCF's MAC address
fka_period: The FIP Keep-Alive period
fka_period:
The FIP Keep-Alive period
fabric_state: The internal kernel state
"Unknown" - Initialization value
"Disconnected" - No link to the FCF/fabric
"Connected" - Host is connected to the FCF
"Deleted" - FCF is being removed from the system
- "Unknown" - Initialization value
- "Disconnected" - No link to the FCF/fabric
- "Connected" - Host is connected to the FCF
- "Deleted" - FCF is being removed from the system
dev_loss_tmo: The device loss timeout period for this FCF.

12
Documentation/ABI/testing/sysfs-bus-fsl-mc
View File

@ -6,8 +6,10 @@ Description:
the driver to attempt to bind to the device found at
this location. The format for the location is Object.Id
and is the same as found in /sys/bus/fsl-mc/devices/.
For example:
# echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/bind
For example::
# echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/bind
What: /sys/bus/fsl-mc/drivers/.../unbind
Date: December 2016
@ -17,5 +19,7 @@ Description:
driver to attempt to unbind from the device found at
this location. The format for the location is Object.Id
and is the same as found in /sys/bus/fsl-mc/devices/.
For example:
# echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/unbind
For example::
# echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/unbind

26
Documentation/ABI/testing/sysfs-bus-i2c-devices-fsa9480
View File

@ -3,19 +3,25 @@ Date: February 2011
Contact: Minkyu Kang <mk7.kang@samsung.com>
Description:
show what device is attached
NONE - no device
USB - USB device is attached
UART - UART is attached
CHARGER - Charger is attaced
JIG - JIG is attached
======= ======================
NONE no device
USB USB device is attached
UART UART is attached
CHARGER Charger is attaced
JIG JIG is attached
======= ======================
What: /sys/bus/i2c/devices/.../switch
Date: February 2011
Contact: Minkyu Kang <mk7.kang@samsung.com>
Description:
show or set the state of manual switch
VAUDIO - switch to VAUDIO path
UART - switch to UART path
AUDIO - switch to AUDIO path
DHOST - switch to DHOST path
AUTO - switch automatically by device
======= ==============================
VAUDIO switch to VAUDIO path
UART switch to UART path
AUDIO switch to AUDIO path
DHOST switch to DHOST path
AUTO switch automatically by device
======= ==============================

27
Documentation/ABI/testing/sysfs-bus-i2c-devices-pca954x
View File

@ -6,15 +6,18 @@ Description:
Value that exists only for mux devices that can be
written to control the behaviour of the multiplexer on
idle. Possible values:
-2 - disconnect on idle, i.e. deselect the last used
channel, which is useful when there is a device
with an address that conflicts with another
device on another mux on the same parent bus.
-1 - leave the mux as-is, which is the most optimal
setting in terms of I2C operations and is the
default mode.
0..<nchans> - set the mux to a predetermined channel,
which is useful if there is one channel that is
used almost always, and you want to reduce the
latency for normal operations after rare
transactions on other channels
=========== ===============================================
-2 disconnect on idle, i.e. deselect the last used
channel, which is useful when there is a device
with an address that conflicts with another
device on another mux on the same parent bus.
-1 leave the mux as-is, which is the most optimal
setting in terms of I2C operations and is the
default mode.
0..<nchans> set the mux to a predetermined channel,
which is useful if there is one channel that is
used almost always, and you want to reduce the
latency for normal operations after rare
transactions on other channels
=========== ===============================================

2
Documentation/ABI/testing/sysfs-bus-i3c
View File

@ -84,6 +84,7 @@ Description:
by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl".
See the I3C specification for more details about these HDR
modes.
This entry describes the HDRCAP of the master controller
driving the bus.
@ -135,6 +136,7 @@ Description:
Expose the HDR (High Data Rate) capabilities of a device.
Returns a list of supported HDR mode, each element is separated
by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl".
See the I3C specification for more details about these HDR
modes.

30
Documentation/ABI/testing/sysfs-bus-iio
View File

@ -15,6 +15,7 @@ Description:
based on hardware generated events (e.g. data ready) or
provided by a separate driver for other hardware (e.g.
periodic timer, GPIO or high resolution timer).
Contains trigger type specific elements. These do not
generalize well and hence are not documented in this file.
X is the IIO index of the trigger.
@ -65,6 +66,7 @@ Contact: linux-iio@vger.kernel.org
Description:
When the internal sampling clock can only take a specific set of
frequencies, we can specify the available values with:
- a small discrete set of values like "0 2 4 6 8"
- a range with minimum, step and maximum frequencies like
"[min step max]"
@ -665,6 +667,7 @@ Description:
<type>[Y][_name]_<raw|input>_thresh_falling_value may take
different values, but the device can only enable both thresholds
or neither.
Note the driver will assume the last p events requested are
to be enabled where p is how many it supports (which may vary
depending on the exact set requested. So if you want to be
@ -719,6 +722,7 @@ Description:
<type>[Y][_name]_<raw|input>_roc_falling_value may take
different values, but the device can only enable both rate of
change thresholds or neither.
Note the driver will assume the last p events requested are
to be enabled where p is however many it supports (which may
vary depending on the exact set requested. So if you want to be
@ -774,9 +778,11 @@ Description:
Specifies the value of threshold that the device is comparing
against for the events enabled by
<type>Y[_name]_thresh[_rising|falling]_en.
If separate attributes exist for the two directions, but
direction is not specified for this attribute, then a single
threshold value applies to both directions.
The raw or input element of the name indicates whether the
value is in raw device units or in processed units (as _raw
and _input do on sysfs direct channel read attributes).
@ -859,6 +865,7 @@ Description:
If separate attributes exist for the two directions, but
direction is not specified for this attribute, then a single
hysteresis value applies to both directions.
For falling events the hysteresis is added to the _value attribute for
this event to get the upper threshold for when the event goes back to
normal, for rising events the hysteresis is subtracted from the _value
@ -905,6 +912,7 @@ Description:
Specifies the value of rate of change threshold that the
device is comparing against for the events enabled by
<type>[Y][_name]_roc[_rising|falling]_en.
If separate attributes exist for the two directions,
but direction is not specified for this attribute,
then a single threshold value applies to both directions.
@ -1304,6 +1312,7 @@ Description:
Proximity measurement indicating that some
object is near the sensor, usually by observing
reflectivity of infrared or ultrasound emitted.
Often these sensors are unit less and as such conversion
to SI units is not possible. Higher proximity measurements
indicate closer objects, and vice versa. Units after
@ -1449,9 +1458,12 @@ Contact: linux-iio@vger.kernel.org
Description:
A single positive integer specifying the maximum number of scan
elements to wait for.
Poll will block until the watermark is reached.
Blocking read will wait until the minimum between the requested
read amount or the low water mark is available.
Non-blocking read will retrieve the available samples from the
buffer even if there are less samples then watermark level. This
allows the application to block on poll with a timeout and read
@ -1480,11 +1492,13 @@ Description:
device settings allows it (e.g. if a trigger is set that samples
data differently that the hardware fifo does then hardware fifo
will not enabled).
If the hardware fifo is enabled and the level of the hardware
fifo reaches the hardware fifo watermark level the device will
flush its hardware fifo to the device buffer. Doing a non
blocking read on the device when no samples are present in the
device buffer will also force a flush.
When the hardware fifo is enabled there is no need to use a
trigger to use buffer mode since the watermark settings
guarantees that the hardware fifo is flushed to the device
@ -1522,6 +1536,7 @@ Description:
A single positive integer specifying the minimum watermark level
for the hardware fifo of this device. If the device does not
have a hardware fifo this entry is not present.
If the user sets buffer/watermark to a value less than this one,
then the hardware watermark will remain unset.
@ -1532,6 +1547,7 @@ Description:
A single positive integer specifying the maximum watermark level
for the hardware fifo of this device. If the device does not
have a hardware fifo this entry is not present.
If the user sets buffer/watermark to a value greater than this
one, then the hardware watermark will be capped at this value.
@ -1543,6 +1559,7 @@ Description:
levels for the hardware fifo. This entry is optional and if it
is not present it means that all the values between
hwfifo_watermark_min and hwfifo_watermark_max are supported.
If the user sets buffer/watermark to a value greater than
hwfifo_watermak_min but not equal to any of the values in this
list, the driver will chose an appropriate value for the
@ -1604,7 +1621,8 @@ KernelVersion: 4.1.0
Contact: linux-iio@vger.kernel.org
Description:
'1' (enable) or '0' (disable) specifying the enable
of heater function. Same reading values apply
of heater function. Same reading values apply.
This ABI is especially applicable for humidity sensors
to heatup the device and get rid of any condensation
in some humidity environment
@ -1627,17 +1645,21 @@ Description:
Mounting matrix for IIO sensors. This is a rotation matrix which
informs userspace about sensor chip's placement relative to the
main hardware it is mounted on.
Main hardware placement is defined according to the local
reference frame related to the physical quantity the sensor
measures.
Given that the rotation matrix is defined in a board specific
way (platform data and / or device-tree), the main hardware
reference frame definition is left to the implementor's choice
(see below for a magnetometer example).
Applications should apply this rotation matrix to samples so
that when main hardware reference frame is aligned onto local
reference frame, then sensor chip reference frame is also
perfectly aligned with it.
Matrix is a 3x3 unitary matrix and typically looks like
[0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix
[1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware
@ -1646,8 +1668,10 @@ Description:
For example, a mounting matrix for a magnetometer sensor informs
userspace about sensor chip's ORIENTATION relative to the main
hardware.
More specifically, main hardware orientation is defined with
respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where :
* Y is in the ground plane and positive towards magnetic North ;
* X is in the ground plane, perpendicular to the North axis and
positive towards the East ;
@ -1656,13 +1680,16 @@ Description:
An implementor might consider that for a hand-held device, a
'natural' orientation would be 'front facing camera at the top'.
The main hardware reference frame could then be described as :
* Y is in the plane of the screen and is positive towards the
top of the screen ;
* X is in the plane of the screen, perpendicular to Y axis, and
positive towards the right hand side of the screen ;
* Z is perpendicular to the screen plane and positive out of the
screen.
Another example for a quadrotor UAV might be :
* Y is in the plane of the propellers and positive towards the
front-view camera;
* X is in the plane of the propellers, perpendicular to Y axis,
@ -1704,6 +1731,7 @@ Description:
This interface is deprecated; please use the Counter subsystem.
A list of possible counting directions which are:
- "up" : counter device is increasing.
- "down": counter device is decreasing.

5
Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector
View File

@ -5,7 +5,8 @@ Contact: Peter Rosin <peda@axentia.se>
Description:
The DAC is used to find the peak level of an alternating
voltage input signal by a binary search using the output
of a comparator wired to an interrupt pin. Like so:
of a comparator wired to an interrupt pin. Like so::
_
| \
input +------>-------|+ \
@ -19,10 +20,12 @@ Description:
| irq|------<-------'
| |
'-------'
The boolean invert attribute (0/1) should be set when the
input signal is centered around the maximum value of the
dac instead of zero. The envelope detector will search
from below in this case and will also invert the result.
The edge/level of the interrupt is also switched to its
opposite value.

5
Documentation/ABI/testing/sysfs-bus-iio-adc-hi8435
View File

@ -19,9 +19,11 @@ Description:
is separately set for "GND-Open" and "Supply-Open" modes.
Channels 0..31 have common low threshold values, but could have different
sensing_modes.
The low voltage threshold range is between 2..21V.
Hysteresis between low and high thresholds can not be lower then 2 and
can not be odd.
If falling threshold results hysteresis to odd value then rising
threshold is automatically subtracted by one.
@ -34,10 +36,13 @@ Description:
this value then the threshold rising event is pushed.
Depending on in_voltageY_sensing_mode the high voltage threshold
is separately set for "GND-Open" and "Supply-Open" modes.
Channels 0..31 have common high threshold values, but could have different
sensing_modes.
The high voltage threshold range is between 3..22V.
Hysteresis between low and high thresholds can not be lower then 2 and
can not be odd.
If rising threshold results hysteresis to odd value then falling
threshold is automatically appended by one.

3
Documentation/ABI/testing/sysfs-bus-iio-adc-stm32
View File

@ -5,10 +5,13 @@ Description:
The STM32 ADC can be configured to use external trigger sources
(e.g. timers, pwm or exti gpio). Then, it can be tuned to start
conversions on external trigger by either:
- "rising-edge"
- "falling-edge"
- "both-edges".
Reading returns current trigger polarity.
Writing value before enabling conversions sets trigger polarity.
What: /sys/bus/iio/devices/triggerX/trigger_polarity_available

2
Documentation/ABI/testing/sysfs-bus-iio-cros-ec
View File

@ -4,7 +4,7 @@ KernelVersion: 4.7
Contact: linux-iio@vger.kernel.org
Description:
Writing '1' will perform a FOC (Fast Online Calibration). The
corresponding calibration offsets can be read from *_calibbias
corresponding calibration offsets can be read from `*_calibbias`
entries.
What: /sys/bus/iio/devices/iio:deviceX/location

8
Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
View File

@ -3,14 +3,20 @@ KernelVersion: 4.14
Contact: arnaud.pouliquen@st.com
Description:
For audio purpose only.
Used by audio driver to set/get the spi input frequency.
This is mandatory if DFSDM is slave on SPI bus, to
provide information on the SPI clock frequency during runtime
Notice that the SPI frequency should be a multiple of sample
frequency to ensure the precision.
if DFSDM input is SPI master
if DFSDM input is SPI master:
Reading SPI clkout frequency,
error on writing
If DFSDM input is SPI Slave:
Reading returns value previously set.
Writing value before starting conversions.

7
Documentation/ABI/testing/sysfs-bus-iio-distance-srf08
View File

@ -15,8 +15,11 @@ Description:
first object echoed in meters. Default value is 6.020.
This setting limits the time the driver is waiting for a
echo.
Showing the range of available values is represented as the
minimum value, the step and the maximum value, all enclosed
in square brackets.
Example:
[0.043 0.043 11.008]
Example::
[0.043 0.043 11.008]

2
Documentation/ABI/testing/sysfs-bus-iio-frequency-ad9523
View File

@ -8,7 +8,9 @@ KernelVersion: 3.4.0
Contact: linux-iio@vger.kernel.org
Description:
Reading returns either '1' or '0'.
'1' means that the clock in question is present.
'0' means that the clock is missing.
What: /sys/bus/iio/devices/iio:deviceX/pllY_locked

10
Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4371
View File

@ -27,12 +27,12 @@ What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_name
KernelVersion:
Contact: linux-iio@vger.kernel.org
Description:
Reading returns the datasheet name for channel Y:
Reading returns the datasheet name for channel Y::
out_altvoltage0_name: RF8x
out_altvoltage1_name: RFAUX8x
out_altvoltage2_name: RF16x
out_altvoltage3_name: RF32x
out_altvoltage0_name: RF8x
out_altvoltage1_name: RFAUX8x
out_altvoltage2_name: RF16x
out_altvoltage3_name: RF32x
What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
KernelVersion:

12
Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
View File

@ -6,10 +6,14 @@ Description:
Get measured values from the ADC for these stages. Y is the
specific stage number corresponding to datasheet stage names
as follows:
1 -> LED2
2 -> ALED2/LED3
3 -> LED1
4 -> ALED1/LED4
== ==========
1 LED2
2 ALED2/LED3
3 LED1
4 ALED1/LED4
== ==========
Note that channels 5 and 6 represent LED2-ALED2 and LED1-ALED1
respectively which simply helper channels containing the
calculated difference in the value of stage 1 - 2 and 3 - 4.

6
Documentation/ABI/testing/sysfs-bus-iio-light-isl29018
View File

@ -15,5 +15,7 @@ Description:
Scheme 0 has wider dynamic range, Scheme 1 proximity detection
is less affected by the ambient IR noise variation.
0 Sensing IR from LED and ambient
1 Sensing IR from LED with ambient IR rejection
== =============================================
0 Sensing IR from LED and ambient
1 Sensing IR from LED with ambient IR rejection
== =============================================

29
Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32
View File

@ -17,9 +17,11 @@ KernelVersion: 4.13
Contact: fabrice.gasnier@st.com
Description:
Configure the device counter quadrature modes:
- non-quadrature:
Encoder IN1 input servers as the count input (up
direction).
- quadrature:
Encoder IN1 and IN2 inputs are mixed to get direction
and count.
@ -35,23 +37,26 @@ KernelVersion: 4.13
Contact: fabrice.gasnier@st.com
Description:
Configure the device encoder/counter active edge:
- rising-edge
- falling-edge
- both-edges
In non-quadrature mode, device counts up on active edge.
In quadrature mode, encoder counting scenarios are as follows:
----------------------------------------------------------------
+---------+----------+--------------------+--------------------+
| Active | Level on | IN1 signal | IN2 signal |
| edge | opposite |------------------------------------------
| edge | opposite +----------+---------+----------+---------+
| | signal | Rising | Falling | Rising | Falling |
----------------------------------------------------------------
| Rising | High -> | Down | - | Up | - |
| edge | Low -> | Up | - | Down | - |
----------------------------------------------------------------
| Falling | High -> | - | Up | - | Down |
| edge | Low -> | - | Down | - | Up |
----------------------------------------------------------------
| Both | High -> | Down | Up | Up | Down |
| edges | Low -> | Up | Down | Down | Up |
----------------------------------------------------------------
+---------+----------+----------+---------+----------+---------+
| Rising | High -> | Down | - | Up | - |
| edge | Low -> | Up | - | Down | - |
+---------+----------+----------+---------+----------+---------+
| Falling | High -> | - | Up | - | Down |
| edge | Low -> | - | Down | - | Up |
+---------+----------+----------+---------+----------+---------+
| Both | High -> | Down | Up | Up | Down |
| edges | Low -> | Up | Down | Down | Up |
+---------+----------+----------+---------+----------+---------+

19
Documentation/ABI/testing/sysfs-bus-iio-magnetometer-hmc5843
View File

@ -5,11 +5,16 @@ Contact: linux-iio@vger.kernel.org
Description:
Current configuration and available configurations
for the bias current.
normal - Normal measurement configurations (default)
positivebias - Positive bias configuration
negativebias - Negative bias configuration
disabled - Only available on HMC5983. Disables magnetic
============ ============================================
normal Normal measurement configurations (default)
positivebias Positive bias configuration
negativebias Negative bias configuration
disabled Only available on HMC5983. Disables magnetic
sensor and enables temperature sensor.
Note: The effect of this configuration may vary
according to the device. For exact documentation
check the device's datasheet.
============ ============================================
Note:
The effect of this configuration may vary
according to the device. For exact documentation
check the device's datasheet.

19
Documentation/ABI/testing/sysfs-bus-iio-temperature-max31856
View File

@ -5,9 +5,12 @@ Description:
Open-circuit fault. The detection of open-circuit faults,
such as those caused by broken thermocouple wires.
Reading returns either '1' or '0'.
'1' = An open circuit such as broken thermocouple wires
has been detected.
'0' = No open circuit or broken thermocouple wires are detected
=== =======================================================
'1' An open circuit such as broken thermocouple wires
has been detected.
'0' No open circuit or broken thermocouple wires are detected
=== =======================================================
What: /sys/bus/iio/devices/iio:deviceX/fault_ovuv
KernelVersion: 5.1
@ -18,7 +21,11 @@ Description:
cables by integrated MOSFETs at the T+ and T- inputs, and the
BIAS output. These MOSFETs turn off when the input voltage is
negative or greater than VDD.
Reading returns either '1' or '0'.
'1' = The input voltage is negative or greater than VDD.
'0' = The input voltage is positive and less than VDD (normal
state).
=== =======================================================
'1' The input voltage is negative or greater than VDD.
'0' The input voltage is positive and less than VDD (normal
state).
=== =======================================================

137
Documentation/ABI/testing/sysfs-bus-iio-timer-stm32
View File

@ -3,67 +3,85 @@ KernelVersion: 4.11
Contact: benjamin.gaignard@st.com
Description:
Reading returns the list possible master modes which are:
- "reset" : The UG bit from the TIMx_EGR register is
- "reset"
The UG bit from the TIMx_EGR register is
used as trigger output (TRGO).
- "enable" : The Counter Enable signal CNT_EN is used
- "enable"
The Counter Enable signal CNT_EN is used
as trigger output.
- "update" : The update event is selected as trigger output.
- "update"
The update event is selected as trigger output.
For instance a master timer can then be used
as a prescaler for a slave timer.
- "compare_pulse" : The trigger output send a positive pulse
when the CC1IF flag is to be set.
- "OC1REF" : OC1REF signal is used as trigger output.
- "OC2REF" : OC2REF signal is used as trigger output.
- "OC3REF" : OC3REF signal is used as trigger output.
- "OC4REF" : OC4REF signal is used as trigger output.
- "compare_pulse"
The trigger output send a positive pulse
when the CC1IF flag is to be set.
- "OC1REF"
OC1REF signal is used as trigger output.
- "OC2REF"
OC2REF signal is used as trigger output.
- "OC3REF"
OC3REF signal is used as trigger output.
- "OC4REF"
OC4REF signal is used as trigger output.
Additional modes (on TRGO2 only):
- "OC5REF" : OC5REF signal is used as trigger output.
- "OC6REF" : OC6REF signal is used as trigger output.
- "OC5REF"
OC5REF signal is used as trigger output.
- "OC6REF"
OC6REF signal is used as trigger output.
- "compare_pulse_OC4REF":
OC4REF rising or falling edges generate pulses.
OC4REF rising or falling edges generate pulses.
- "compare_pulse_OC6REF":
OC6REF rising or falling edges generate pulses.
OC6REF rising or falling edges generate pulses.
- "compare_pulse_OC4REF_r_or_OC6REF_r":
OC4REF or OC6REF rising edges generate pulses.
OC4REF or OC6REF rising edges generate pulses.
- "compare_pulse_OC4REF_r_or_OC6REF_f":
OC4REF rising or OC6REF falling edges generate pulses.
OC4REF rising or OC6REF falling edges generate
pulses.
- "compare_pulse_OC5REF_r_or_OC6REF_r":
OC5REF or OC6REF rising edges generate pulses.
OC5REF or OC6REF rising edges generate pulses.
- "compare_pulse_OC5REF_r_or_OC6REF_f":
OC5REF rising or OC6REF falling edges generate pulses.
OC5REF rising or OC6REF falling edges generate
pulses.
+-----------+ +-------------+ +---------+
| Prescaler +-> | Counter | +-> | Master | TRGO(2)
+-----------+ +--+--------+-+ |-> | Control +-->
| | || +---------+
+--v--------+-+ OCxREF || +---------+
| Chx compare +----------> | Output | ChX
+-----------+-+ | | Control +-->
. | | +---------+
. | | .
+-----------v-+ OC6REF | .
| Ch6 compare +---------+>
+-------------+
::
Example with: "compare_pulse_OC4REF_r_or_OC6REF_r":
+-----------+ +-------------+ +---------+
| Prescaler +-> | Counter | +-> | Master | TRGO(2)
+-----------+ +--+--------+-+ |-> | Control +-->
| | || +---------+
+--v--------+-+ OCxREF || +---------+
| Chx compare +----------> | Output | ChX
+-----------+-+ | | Control +-->
. | | +---------+
. | | .
+-----------v-+ OC6REF | .
| Ch6 compare +---------+>
+-------------+
X
X X
X . . X
X . . X
X . . X
count X . . . . X
. . . .
. . . .
+---------------+
OC4REF | . . |
+-+ . . +-+
. +---+ .
OC6REF . | | .
+-------+ +-------+
+-+ +-+
TRGO2 | | | |
+-+ +---+ +---------+
Example with: "compare_pulse_OC4REF_r_or_OC6REF_r"::
X
X X
X . . X
X . . X
X . . X
count X . . . . X
. . . .
. . . .
+---------------+
OC4REF | . . |
+-+ . . +-+
. +---+ .
OC6REF . | | .
+-------+ +-------+
+-+ +-+
TRGO2 | | | |
+-+ +---+ +---------+
What: /sys/bus/iio/devices/triggerX/master_mode
KernelVersion: 4.11
@ -91,6 +109,30 @@ Description:
When counting down the counter start from preset value
and fire event when reach 0.
What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
KernelVersion: 4.12
Contact: benjamin.gaignard@st.com
Description:
Reading returns the list possible quadrature modes.
What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode
KernelVersion: 4.12
Contact: benjamin.gaignard@st.com
Description:
Configure the device counter quadrature modes:
channel_A:
Encoder A input servers as the count input and B as
the UP/DOWN direction control input.
channel_B:
Encoder B input serves as the count input and A as
the UP/DOWN direction control input.
quadrature:
Encoder A and B inputs are mixed to get direction
and count with a scale of 0.25.
What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available
KernelVersion: 4.12
Contact: benjamin.gaignard@st.com
@ -104,6 +146,7 @@ Description:
Configure the device counter enable modes, in all case
counting direction is set by in_count0_count_direction
attribute and the counter is clocked by the internal clock.
always:
Counter is always ON.

11
Documentation/ABI/testing/sysfs-bus-intel_th-devices-gth
View File

@ -10,10 +10,13 @@ Date: June 2015
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RO) Output port type:
0: not present,
1: MSU (Memory Storage Unit)
2: CTP (Common Trace Port)
4: PTI (MIPI PTI).
== =========================
0 not present,
1 MSU (Memory Storage Unit)
2 CTP (Common Trace Port)
4 PTI (MIPI PTI).
== =========================
What: /sys/bus/intel_th/devices/<intel_th_id>-gth/outputs/[0-7]_drop
Date: June 2015

4
Documentation/ABI/testing/sysfs-bus-intel_th-devices-msc
View File

@ -9,11 +9,13 @@ Date: June 2015
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RW) Configure MSC operating mode:
- "single", for contiguous buffer mode (high-order alloc);
- "multi", for multiblock mode;
- "ExI", for DCI handler mode;
- "debug", for debug mode;
- any of the currently loaded buffer sinks.
If operating mode changes, existing buffer is deallocated,
provided there are no active users and tracing is not enabled,
otherwise the write will fail.
@ -23,10 +25,12 @@ Date: June 2015
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RW) Configure MSC buffer size for "single" or "multi" modes.
In single mode, this is a single number of pages, has to be
power of 2. In multiblock mode, this is a comma-separated list
of numbers of pages for each window to be allocated. Number of
windows is not limited.
Writing to this file deallocates existing buffer (provided
there are no active users and tracing is not enabled) and then
allocates a new one.

6
Documentation/ABI/testing/sysfs-bus-most
View File

@ -235,7 +235,8 @@ KernelVersion: 4.15
Contact: Christian Gromm <christian.gromm@microchip.com>
Description:
This is to read back the configured direction of the channel.
The following strings will be accepted:
The following strings will be accepted::
'tx',
'rx'
Users:
@ -246,7 +247,8 @@ KernelVersion: 4.15
Contact: Christian Gromm <christian.gromm@microchip.com>
Description:
This is to read back the configured data type of the channel.
The following strings will be accepted:
The following strings will be accepted::
'control',
'async',
'sync',

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