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提交 64282ea2 编写于 作者: D Daniel Vetter
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Merge airlied/drm-next into drm-intel-next-queued 

Resync with upstream to avoid git getting too badly confused. Also, we
have a conflict with the drm_vblank_cleanup removal, which cannot be
resolved by simply taking our side. Bake that in properly.
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
上级 d2939424 e6742e10
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文本差异 电子邮件补丁
Documentation/00-INDEX
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......@@ -24,8 +24,6 @@ DMA-ISA-LPC.txt
- How to do DMA with ISA (and LPC) devices.
DMA-attributes.txt
- listing of the various possible attributes a DMA region can have
DocBook/
- directory with DocBook templates etc. for kernel documentation.
EDID/
- directory with info on customizing EDID for broken gfx/displays.
IPMI.txt
......@@ -40,8 +38,6 @@ Intel-IOMMU.txt
- basic info on the Intel IOMMU virtualization support.
Makefile
- It's not of interest for those who aren't touching the build system.
Makefile.sphinx
- It's not of interest for those who aren't touching the build system.
PCI/
- info related to PCI drivers.
RCU/
......@@ -246,8 +242,6 @@ kprobes.txt
- documents the kernel probes debugging feature.
kref.txt
- docs on adding reference counters (krefs) to kernel objects.
kselftest.txt
- small unittests for (some) individual codepaths in the kernel.
laptops/
- directory with laptop related info and laptop driver documentation.
ldm.txt
......@@ -264,6 +258,8 @@ logo.gif
- full colour GIF image of Linux logo (penguin - Tux).
logo.txt
- info on creator of above logo & site to get additional images from.
lsm.txt
- Linux Security Modules: General Security Hooks for Linux
lzo.txt
- kernel LZO decompressor input formats
m68k/
......
Documentation/ABI/stable/sysfs-class-udc
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......@@ -55,14 +55,6 @@ Description:
Indicates the maximum USB speed supported by this port.
Users:
What: /sys/class/udc/<udc>/maximum_speed
Date: June 2011
KernelVersion: 3.1
Contact: Felipe Balbi <balbi@kernel.org>
Description:
Indicates the maximum USB speed supported by this port.
Users:
What: /sys/class/udc/<udc>/soft_connect
Date: June 2011
KernelVersion: 3.1
......@@ -91,3 +83,11 @@ Description:
'configured', and 'suspended'; however not all USB Device
Controllers support reporting all states.
Users:
What: /sys/class/udc/<udc>/function
Date: June 2017
KernelVersion: 4.13
Contact: Felipe Balbi <balbi@kernel.org>
Description:
Prints out name of currently running USB Gadget Driver.
Users:
Documentation/ABI/stable/sysfs-driver-aspeed-vuart 0 → 100644
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What: /sys/bus/platform/drivers/aspeed-vuart/*/lpc_address
Date: April 2017
Contact: Jeremy Kerr <jk@ozlabs.org>
Description: Configures which IO port the host side of the UART
will appear on the host <-> BMC LPC bus.
Users: OpenBMC. Proposed changes should be mailed to
openbmc@lists.ozlabs.org
What: /sys/bus/platform/drivers/aspeed-vuart*/sirq
Date: April 2017
Contact: Jeremy Kerr <jk@ozlabs.org>
Description: Configures which interrupt number the host side of
the UART will appear on the host <-> BMC LPC bus.
Users: OpenBMC. Proposed changes should be mailed to
openbmc@lists.ozlabs.org
Documentation/ABI/stable/sysfs-hypervisor-xen 0 → 100644
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What: /sys/hypervisor/compilation/compile_date
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Contains the build time stamp of the Xen hypervisor
Might return "<denied>" in case of special security settings
in the hypervisor.
What: /sys/hypervisor/compilation/compiled_by
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Contains information who built the Xen hypervisor
Might return "<denied>" in case of special security settings
in the hypervisor.
What: /sys/hypervisor/compilation/compiler
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Compiler which was used to build the Xen hypervisor
Might return "<denied>" in case of special security settings
in the hypervisor.
What: /sys/hypervisor/properties/capabilities
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
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
<minor>: minor guest interface version
<arch>: architecture, e.g.:
"x86_32": 32 bit x86 guest without PAE
"x86_32p": 32 bit x86 guest with PAE
"x86_64": 64 bit x86 guest
"armv7l": 32 bit arm guest
"aarch64": 64 bit arm guest
What: /sys/hypervisor/properties/changeset
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Changeset of the hypervisor (git commit)
Might return "<denied>" in case of special security settings
in the hypervisor.
What: /sys/hypervisor/properties/features
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Features the Xen hypervisor supports for the guest as defined
in include/xen/interface/features.h printed as a hex value.
What: /sys/hypervisor/properties/pagesize
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Default page size of the hypervisor printed as a hex value.
Might return "0" in case of special security settings
in the hypervisor.
What: /sys/hypervisor/properties/virtual_start
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Virtual address of the hypervisor as a hex value.
What: /sys/hypervisor/type
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Type of hypervisor:
"xen": Xen hypervisor
What: /sys/hypervisor/uuid
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
UUID of the guest as known to the Xen hypervisor.
What: /sys/hypervisor/version/extra
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
The Xen version is in the format <major>.<minor><extra>
This is the <extra> part of it.
Might return "<denied>" in case of special security settings
in the hypervisor.
What: /sys/hypervisor/version/major
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
The Xen version is in the format <major>.<minor><extra>
This is the <major> part of it.
What: /sys/hypervisor/version/minor
Date: March 2009
KernelVersion: 2.6.30
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
The Xen version is in the format <major>.<minor><extra>
This is the <minor> part of it.
Documentation/ABI/testing/configfs-usb-gadget-uac1
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What: /config/usb-gadget/gadget/functions/uac1.name
Date: Sep 2014
KernelVersion: 3.18
Date: June 2017
KernelVersion: 4.14
Description:
The attributes:
audio_buf_size - audio buffer size
fn_cap - capture pcm device file name
fn_cntl - control device file name
fn_play - playback pcm device file name
req_buf_size - ISO OUT endpoint request buffer size
req_count - ISO OUT endpoint request count
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
Documentation/ABI/testing/configfs-usb-gadget-uac1_legacy 0 → 100644
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What: /config/usb-gadget/gadget/functions/uac1_legacy.name
Date: Sep 2014
KernelVersion: 3.18
Description:
The attributes:
audio_buf_size - audio buffer size
fn_cap - capture pcm device file name
fn_cntl - control device file name
fn_play - playback pcm device file name
req_buf_size - ISO OUT endpoint request buffer size
req_count - ISO OUT endpoint request count
Documentation/ABI/testing/ima_policy
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......@@ -34,9 +34,10 @@ Description:
fsuuid:= file system UUID (e.g 8bcbe394-4f13-4144-be8e-5aa9ea2ce2f6)
uid:= decimal value
euid:= decimal value
fowner:=decimal value
fowner:= decimal value
lsm: are LSM specific
option: appraise_type:= [imasig]
pcr:= decimal value
default policy:
# PROC_SUPER_MAGIC
......@@ -96,3 +97,8 @@ Description:
Smack:
measure subj_user=_ func=FILE_CHECK mask=MAY_READ
Example of measure rules using alternate PCRs:
measure func=KEXEC_KERNEL_CHECK pcr=4
measure func=KEXEC_INITRAMFS_CHECK pcr=5
Documentation/ABI/testing/sysfs-bus-fsi 0 → 100644
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What: /sys/bus/platform/devices/fsi-master/rescan
Date: May 2017
KernelVersion: 4.12
Contact: cbostic@linux.vnet.ibm.com
Description:
Initiates a FSI master scan for all connected slave devices
on its links.
What: /sys/bus/platform/devices/fsi-master/break
Date: May 2017
KernelVersion: 4.12
Contact: cbostic@linux.vnet.ibm.com
Description:
Sends an FSI BREAK command on a master's communication
link to any connnected slaves. A BREAK resets connected
device's logic and preps it to receive further commands
from the master.
What: /sys/bus/platform/devices/fsi-master/slave@00:00/term
Date: May 2017
KernelVersion: 4.12
Contact: cbostic@linux.vnet.ibm.com
Description:
Sends an FSI terminate command from the master to its
connected slave. A terminate resets the slave's state machines
that control access to the internally connected engines. In
addition the slave freezes its internal error register for
debugging purposes. This command is also needed to abort any
ongoing operation in case of an expired 'Master Time Out'
timer.
What: /sys/bus/platform/devices/fsi-master/slave@00:00/raw
Date: May 2017
KernelVersion: 4.12
Contact: cbostic@linux.vnet.ibm.com
Description:
Provides a means of reading/writing a 32 bit value from/to a
specified FSI bus address.
Documentation/ABI/testing/sysfs-bus-iio
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......@@ -1425,6 +1425,17 @@ Description:
guarantees that the hardware fifo is flushed to the device
buffer.
What: /sys/bus/iio/devices/iio:device*/buffer/hwfifo_timeout
KernelVersion: 4.12
Contact: linux-iio@vger.kernel.org
Description:
A read/write property to provide capability to delay reporting of
samples till a timeout is reached. This allows host processors to
sleep, while the sensor is storing samples in its internal fifo.
The maximum timeout in seconds can be specified by setting
hwfifo_timeout.The current delay can be read by reading
hwfifo_timeout. A value of 0 means that there is no timeout.
What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark
KernelVersion: 4.2
Contact: linux-iio@vger.kernel.org
......
Documentation/ABI/testing/sysfs-bus-iio-meas-spec
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......@@ -5,4 +5,3 @@ Description:
Reading returns either '1' or '0'. '1' means that the
battery level supplied to sensor is below 2.25V.
This ABI is available for tsys02d, htu21, ms8607
This ABI is available for htu21, ms8607
Documentation/ABI/testing/sysfs-bus-iio-timer-stm32
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......@@ -16,6 +16,54 @@ Description:
- "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.
- "compare_pulse_OC4REF":
OC4REF rising or falling edges generate pulses.
- "compare_pulse_OC6REF":
OC6REF rising or falling edges generate pulses.
- "compare_pulse_OC4REF_r_or_OC6REF_r":
OC4REF or OC6REF rising edges generate pulses.
- "compare_pulse_OC4REF_r_or_OC6REF_f":
OC4REF rising or OC6REF falling edges generate pulses.
- "compare_pulse_OC5REF_r_or_OC6REF_r":
OC5REF or OC6REF rising edges generate pulses.
- "compare_pulse_OC5REF_r_or_OC6REF_f":
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":
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
......@@ -90,3 +138,18 @@ Description:
Counting is enabled on rising edge of the connected
trigger, and remains enabled for the duration of this
selected mode.
What: /sys/bus/iio/devices/iio:deviceX/in_count_trigger_mode_available
KernelVersion: 4.13
Contact: benjamin.gaignard@st.com
Description:
Reading returns the list possible trigger modes.
What: /sys/bus/iio/devices/iio:deviceX/in_count0_trigger_mode
KernelVersion: 4.13
Contact: benjamin.gaignard@st.com
Description:
Configure the device counter trigger mode
counting direction is set by in_count0_count_direction
attribute and the counter is clocked by the connected trigger
rising edges.
Documentation/ABI/testing/sysfs-bus-thunderbolt 0 → 100644
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What: /sys/bus/thunderbolt/devices/.../domainX/security
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: This attribute holds current Thunderbolt security level
set by the system BIOS. Possible values are:
none: All devices are automatically authorized
user: Devices are only authorized based on writing
appropriate value to the authorized attribute
secure: Require devices that support secure connect at
minimum. User needs to authorize each device.
dponly: Automatically tunnel Display port (and USB). No
PCIe tunnels are created.
What: /sys/bus/thunderbolt/devices/.../authorized
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: This attribute is used to authorize Thunderbolt devices
after they have been connected. If the device is not
authorized, no devices such as PCIe and Display port are
available to the system.
Contents of this attribute will be 0 when the device is not
yet authorized.
Possible values are supported:
1: The device will be authorized and connected
When key attribute contains 32 byte hex string the possible
values are:
1: The 32 byte hex string is added to the device NVM and
the device is authorized.
2: Send a challenge based on the 32 byte hex string. If the
challenge response from device is valid, the device is
authorized. In case of failure errno will be ENOKEY if
the device did not contain a key at all, and
EKEYREJECTED if the challenge response did not match.
What: /sys/bus/thunderbolt/devices/.../key
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: When a devices supports Thunderbolt secure connect it will
have this attribute. Writing 32 byte hex string changes
authorization to use the secure connection method instead.
What: /sys/bus/thunderbolt/devices/.../device
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: This attribute contains id of this device extracted from
the device DROM.
What: /sys/bus/thunderbolt/devices/.../device_name
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: This attribute contains name of this device extracted from
the device DROM.
What: /sys/bus/thunderbolt/devices/.../vendor
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: This attribute contains vendor id of this device extracted
from the device DROM.
What: /sys/bus/thunderbolt/devices/.../vendor_name
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: This attribute contains vendor name of this device extracted
from the device DROM.
What: /sys/bus/thunderbolt/devices/.../unique_id
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: This attribute contains unique_id string of this device.
This is either read from hardware registers (UUID on
newer hardware) or based on UID from the device DROM.
Can be used to uniquely identify particular device.
What: /sys/bus/thunderbolt/devices/.../nvm_version
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: If the device has upgradeable firmware the version
number is available here. Format: %x.%x, major.minor.
If the device is in safe mode reading the file returns
-ENODATA instead as the NVM version is not available.
What: /sys/bus/thunderbolt/devices/.../nvm_authenticate
Date: Sep 2017
KernelVersion: 4.13
Contact: thunderbolt-software@lists.01.org
Description: When new NVM image is written to the non-active NVM
area (through non_activeX NVMem device), the
authentication procedure is started by writing 1 to
this file. If everything goes well, the device is
restarted with the new NVM firmware. If the image
verification fails an error code is returned instead.
When read holds status of the last authentication
operation if an error occurred during the process. This
is directly the status value from the DMA configuration
based mailbox before the device is power cycled. Writing
0 here clears the status.
Documentation/ABI/testing/sysfs-class-mtd
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......@@ -229,6 +229,6 @@ KernelVersion: 4.1
Contact: linux-mtd@lists.infradead.org
Description:
For a partition, the offset of that partition from the start
of the master device in bytes. This attribute is absent on
main devices, so it can be used to distinguish between
partitions and devices that aren't partitions.
of the parent (another partition or a flash device) in bytes.
This attribute is absent on flash devices, so it can be used
to distinguish them from partitions.
Documentation/ABI/testing/sysfs-class-mux 0 → 100644
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What: /sys/class/mux/
Date: April 2017
KernelVersion: 4.13
Contact: Peter Rosin <peda@axentia.se>
Description:
The mux/ class sub-directory belongs to the Generic MUX
Framework and provides a sysfs interface for using MUX
controllers.
What: /sys/class/mux/muxchipN/
Date: April 2017
KernelVersion: 4.13
Contact: Peter Rosin <peda@axentia.se>
Description:
A /sys/class/mux/muxchipN directory is created for each
probed MUX chip where N is a simple enumeration.
Documentation/ABI/testing/sysfs-class-net
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......@@ -251,3 +251,11 @@ Contact: netdev@vger.kernel.org
Description:
Indicates the unique physical switch identifier of a switch this
port belongs to, as a string.
What: /sys/class/net/<iface>/phydev
Date: May 2017
KernelVersion: 4.13
Contact: netdev@vger.kernel.org
Description:
Symbolic link to the PHY device this network device is attached
to.
Documentation/ABI/testing/sysfs-class-net-phydev 0 → 100644
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What: /sys/class/mdio_bus/<bus>/<device>/attached_dev
Date: May 2017
KernelVersion: 4.13
Contact: netdev@vger.kernel.org
Description:
Symbolic link to the network device this PHY device is
attached to.
What: /sys/class/mdio_bus/<bus>/<device>/phy_has_fixups
Date: February 2014
KernelVersion: 3.15
Contact: netdev@vger.kernel.org
Description:
Boolean value indicating whether the PHY device has
any fixups registered against it (phy_register_fixup)
What: /sys/class/mdio_bus/<bus>/<device>/phy_id
Date: November 2012
KernelVersion: 3.8
Contact: netdev@vger.kernel.org
Description:
32-bit hexadecimal value corresponding to the PHY device's OUI,
model and revision number.
What: /sys/class/mdio_bus/<bus>/<device>/phy_interface
Date: February 2014
KernelVersion: 3.15
Contact: netdev@vger.kernel.org
Description:
String value indicating the PHY interface, possible
values are:.
<empty> (not available), mii, gmii, sgmii, tbi, rev-mii,
rmii, rgmii, rgmii-id, rgmii-rxid, rgmii-txid, rtbi, smii
xgmii, moca, qsgmii, trgmii, 1000base-x, 2500base-x, rxaui,
xaui, 10gbase-kr, unknown
Documentation/ABI/testing/sysfs-class-power-twl4030
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What: /sys/class/power_supply/twl4030_ac/max_current
/sys/class/power_supply/twl4030_usb/max_current
Description:
Read/Write limit on current which may
be drawn from the ac (Accessory Charger) or
USB port.
Value is in micro-Amps.
Value is set automatically to an appropriate
value when a cable is plugged or unplugged.
Value can the set by writing to the attribute.
The change will only persist until the next
plug event. These event are reported via udev.
What: /sys/class/power_supply/twl4030_usb/mode
Description:
Changing mode for USB port.
......
Documentation/ABI/testing/sysfs-class-typec
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......@@ -30,6 +30,21 @@ Description:
Valid values: source, sink
What: /sys/class/typec/<port>/port_type
Date: May 2017
Contact: Badhri Jagan Sridharan <Badhri@google.com>
Description:
Indicates the type of the port. This attribute can be used for
requesting a change in the port type. Port type change is
supported as a synchronous operation, so write(2) to the
attribute will not return until the operation has finished.
Valid values:
- source (The port will behave as source only DFP port)
- sink (The port will behave as sink only UFP port)
- dual (The port will behave as dual-role-data and
dual-role-power port)
What: /sys/class/typec/<port>/vconn_source
Date: April 2017
Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
......
Documentation/ABI/testing/sysfs-firmware-ofw
浏览文件 @ 64282ea2
What: /sys/firmware/devicetree/*
Date: November 2013
Contact: Grant Likely <grant.likely@linaro.org>
Contact: Grant Likely <grant.likely@arm.com>, devicetree@vger.kernel.org
Description:
When using OpenFirmware or a Flattened Device Tree to enumerate
hardware, the device tree structure will be exposed in this
......@@ -26,3 +26,27 @@ Description:
name plus address). Properties are represented as files
in the directory. The contents of each file is the exact
binary data from the device tree.
What: /sys/firmware/fdt
Date: February 2015
KernelVersion: 3.19
Contact: Frank Rowand <frowand.list@gmail.com>, devicetree@vger.kernel.org
Description:
Exports the FDT blob that was passed to the kernel by
the bootloader. This allows userland applications such
as kexec to access the raw binary. This blob is also
useful when debugging since it contains any changes
made to the blob by the bootloader.
The fact that this node does not reside under
/sys/firmware/device-tree is deliberate: FDT is also used
on arm64 UEFI/ACPI systems to communicate just the UEFI
and ACPI entry points, but the FDT is never unflattened
and used to configure the system.
A CRC32 checksum is calculated over the entire FDT
blob, and verified at late_initcall time. The sysfs
entry is instantiated only if the checksum is valid,
i.e., if the FDT blob has not been modified in the mean
time. Otherwise, a warning is printed.
Users: kexec, debugging
Documentation/ABI/testing/sysfs-fs-f2fs
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......@@ -75,7 +75,7 @@ Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the memory footprint used by f2fs.
What: /sys/fs/f2fs/<disk>/trim_sections
What: /sys/fs/f2fs/<disk>/batched_trim_sections
Date: February 2015
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
......@@ -112,3 +112,21 @@ Date: January 2016
Contact: "Shuoran Liu" <liushuoran@huawei.com>
Description:
Shows total written kbytes issued to disk.
What: /sys/fs/f2fs/<disk>/inject_rate
Date: May 2016
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls the injection rate.
What: /sys/fs/f2fs/<disk>/inject_type
Date: May 2016
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls the injection type.
What: /sys/fs/f2fs/<disk>/reserved_blocks
Date: June 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls current reserved blocks in system.
Documentation/ABI/testing/sysfs-hypervisor-pmu 已删除 100644 → 0
浏览文件 @ d2939424
What: /sys/hypervisor/pmu/pmu_mode
Date: August 2015
KernelVersion: 4.3
Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Description:
Describes mode that Xen's performance-monitoring unit (PMU)
uses. Accepted values are
"off" -- PMU is disabled
"self" -- The guest can profile itself
"hv" -- The guest can profile itself and, if it is
privileged (e.g. dom0), the hypervisor
"all" -- The guest can profile itself, the hypervisor
and all other guests. Only available to
privileged guests.
What: /sys/hypervisor/pmu/pmu_features
Date: August 2015
KernelVersion: 4.3
Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Description:
Describes Xen PMU features (as an integer). A set bit indicates
that the corresponding feature is enabled. See
include/xen/interface/xenpmu.h for available features
Documentation/ABI/testing/sysfs-hypervisor-xen 0 → 100644
浏览文件 @ 64282ea2
What: /sys/hypervisor/guest_type
Date: June 2017
KernelVersion: 4.13
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Type of guest:
"Xen": standard guest type on arm
"HVM": fully virtualized guest (x86)
"PV": paravirtualized guest (x86)
"PVH": fully virtualized guest without legacy emulation (x86)
What: /sys/hypervisor/pmu/pmu_mode
Date: August 2015
KernelVersion: 4.3
Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Description: If running under Xen:
Describes mode that Xen's performance-monitoring unit (PMU)
uses. Accepted values are
"off" -- PMU is disabled
"self" -- The guest can profile itself
"hv" -- The guest can profile itself and, if it is
privileged (e.g. dom0), the hypervisor
"all" -- The guest can profile itself, the hypervisor
and all other guests. Only available to
privileged guests.
What: /sys/hypervisor/pmu/pmu_features
Date: August 2015
KernelVersion: 4.3
Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Description: If running under Xen:
Describes Xen PMU features (as an integer). A set bit indicates
that the corresponding feature is enabled. See
include/xen/interface/xenpmu.h for available features
What: /sys/hypervisor/properties/buildid
Date: June 2017
KernelVersion: 4.13
Contact: xen-devel@lists.xenproject.org
Description: If running under Xen:
Build id of the hypervisor, needed for hypervisor live patching.
Might return "<denied>" in case of special security settings
in the hypervisor.
Documentation/ABI/testing/sysfs-platform-ideapad-laptop
浏览文件 @ 64282ea2
......@@ -17,3 +17,11 @@ Description:
* 2 -> Dust Cleaning
* 4 -> Efficient Thermal Dissipation Mode
What: /sys/devices/platform/ideapad/touchpad
Date: May 2017
KernelVersion: 4.13
Contact: "Ritesh Raj Sarraf <rrs@debian.org>"
Description:
Control touchpad mode.
* 1 -> Switched On
* 0 -> Switched Off
Documentation/ABI/testing/sysfs-uevent 0 → 100644
浏览文件 @ 64282ea2
What: /sys/.../uevent
Date: May 2017
KernelVersion: 4.13
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description:
Enable passing additional variables for synthetic uevents that
are generated by writing /sys/.../uevent file.
Recognized extended format is ACTION [UUID [KEY=VALUE ...].
The ACTION is compulsory - it is the name of the uevent action
("add", "change", "remove"). There is no change compared to
previous functionality here. The rest of the extended format
is optional.
You need to pass UUID first before any KEY=VALUE pairs.
The UUID must be in "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
format where 'x' is a hex digit. The UUID is considered to be
a transaction identifier so it's possible to use the same UUID
value for one or more synthetic uevents in which case we
logically group these uevents together for any userspace
listeners. The UUID value appears in uevent as
"SYNTH_UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" environment
variable.
If UUID is not passed in, the generated synthetic uevent gains
"SYNTH_UUID=0" environment variable automatically.
The KEY=VALUE pairs can contain alphanumeric characters only.
It's possible to define zero or more pairs - each pair is then
delimited by a space character ' '. Each pair appears in
synthetic uevent as "SYNTH_ARG_KEY=VALUE". That means the KEY
name gains "SYNTH_ARG_" prefix to avoid possible collisions
with existing variables.
Example of valid sequence written to the uevent file:
add fe4d7c9d-b8c6-4a70-9ef1-3d8a58d18eed A=1 B=abc
This generates synthetic uevent including these variables:
ACTION=add
SYNTH_ARG_A=1
SYNTH_ARG_B=abc
SYNTH_UUID=fe4d7c9d-b8c6-4a70-9ef1-3d8a58d18eed
Users:
udev, userspace tools generating synthetic uevents
Documentation/DMA-API-HOWTO.txt
浏览文件 @ 64282ea2
Dynamic DMA mapping Guide
=========================
=========================
Dynamic DMA mapping Guide
=========================
David S. Miller <davem@redhat.com>
Richard Henderson <rth@cygnus.com>
Jakub Jelinek <jakub@redhat.com>
:Author: David S. Miller <davem@redhat.com>
:Author: Richard Henderson <rth@cygnus.com>
:Author: Jakub Jelinek <jakub@redhat.com>
This is a guide to device driver writers on how to use the DMA API
with example pseudo-code. For a concise description of the API, see
DMA-API.txt.
CPU and DMA addresses
CPU and DMA addresses
=====================
There are several kinds of addresses involved in the DMA API, and it's
important to understand the differences.
The kernel normally uses virtual addresses. Any address returned by
kmalloc(), vmalloc(), and similar interfaces is a virtual address and can
be stored in a "void *".
be stored in a ``void *``.
The virtual memory system (TLB, page tables, etc.) translates virtual
addresses to CPU physical addresses, which are stored as "phys_addr_t" or
......@@ -37,7 +39,7 @@ be restricted to a subset of that space. For example, even if a system
supports 64-bit addresses for main memory and PCI BARs, it may use an IOMMU
so devices only need to use 32-bit DMA addresses.
Here's a picture and some examples:
Here's a picture and some examples::
CPU CPU Bus
Virtual Physical Address
......@@ -98,15 +100,16 @@ microprocessor architecture. You should use the DMA API rather than the
bus-specific DMA API, i.e., use the dma_map_*() interfaces rather than the
pci_map_*() interfaces.
First of all, you should make sure
First of all, you should make sure::
#include <linux/dma-mapping.h>
#include <linux/dma-mapping.h>
is in your driver, which provides the definition of dma_addr_t. This type
can hold any valid DMA address for the platform and should be used
everywhere you hold a DMA address returned from the DMA mapping functions.
What memory is DMA'able?
What memory is DMA'able?
========================
The first piece of information you must know is what kernel memory can
be used with the DMA mapping facilities. There has been an unwritten
......@@ -143,7 +146,8 @@ What about block I/O and networking buffers? The block I/O and
networking subsystems make sure that the buffers they use are valid
for you to DMA from/to.
DMA addressing limitations
DMA addressing limitations
==========================
Does your device have any DMA addressing limitations? For example, is
your device only capable of driving the low order 24-bits of address?
......@@ -166,7 +170,7 @@ style to do this even if your device holds the default setting,
because this shows that you did think about these issues wrt. your
device.
The query is performed via a call to dma_set_mask_and_coherent():
The query is performed via a call to dma_set_mask_and_coherent()::
int dma_set_mask_and_coherent(struct device *dev, u64 mask);
......@@ -175,12 +179,12 @@ If you have some special requirements, then the following two separate
queries can be used instead:
The query for streaming mappings is performed via a call to
dma_set_mask():
dma_set_mask()::
int dma_set_mask(struct device *dev, u64 mask);
The query for consistent allocations is performed via a call
to dma_set_coherent_mask():
to dma_set_coherent_mask()::
int dma_set_coherent_mask(struct device *dev, u64 mask);
......@@ -209,7 +213,7 @@ of your driver reports that performance is bad or that the device is not
even detected, you can ask them for the kernel messages to find out
exactly why.
The standard 32-bit addressing device would do something like this:
The standard 32-bit addressing device would do something like this::
if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
dev_warn(dev, "mydev: No suitable DMA available\n");
......@@ -225,7 +229,7 @@ than 64-bit addressing. For example, Sparc64 PCI SAC addressing is
more efficient than DAC addressing.
Here is how you would handle a 64-bit capable device which can drive
all 64-bits when accessing streaming DMA:
all 64-bits when accessing streaming DMA::
int using_dac;
......@@ -239,7 +243,7 @@ all 64-bits when accessing streaming DMA:
}
If a card is capable of using 64-bit consistent allocations as well,
the case would look like this:
the case would look like this::
int using_dac, consistent_using_dac;
......@@ -260,7 +264,7 @@ uses consistent allocations, one would have to check the return value from
dma_set_coherent_mask().
Finally, if your device can only drive the low 24-bits of
address you might do something like:
address you might do something like::
if (dma_set_mask(dev, DMA_BIT_MASK(24))) {
dev_warn(dev, "mydev: 24-bit DMA addressing not available\n");
......@@ -280,7 +284,7 @@ only provide the functionality which the machine can handle. It
is important that the last call to dma_set_mask() be for the
most specific mask.
Here is pseudo-code showing how this might be done:
Here is pseudo-code showing how this might be done::
#define PLAYBACK_ADDRESS_BITS DMA_BIT_MASK(32)
#define RECORD_ADDRESS_BITS DMA_BIT_MASK(24)
......@@ -308,7 +312,8 @@ A sound card was used as an example here because this genre of PCI
devices seems to be littered with ISA chips given a PCI front end,
and thus retaining the 16MB DMA addressing limitations of ISA.
Types of DMA mappings
Types of DMA mappings
=====================
There are two types of DMA mappings:
......@@ -336,12 +341,14 @@ There are two types of DMA mappings:
to memory is immediately visible to the device, and vice
versa. Consistent mappings guarantee this.
IMPORTANT: Consistent DMA memory does not preclude the usage of
proper memory barriers. The CPU may reorder stores to
.. important::
Consistent DMA memory does not preclude the usage of
proper memory barriers. The CPU may reorder stores to
consistent memory just as it may normal memory. Example:
if it is important for the device to see the first word
of a descriptor updated before the second, you must do
something like:
something like::
desc->word0 = address;
wmb();
......@@ -377,16 +384,17 @@ Also, systems with caches that aren't DMA-coherent will work better
when the underlying buffers don't share cache lines with other data.
Using Consistent DMA mappings.
Using Consistent DMA mappings
=============================
To allocate and map large (PAGE_SIZE or so) consistent DMA regions,
you should do:
you should do::
dma_addr_t dma_handle;
cpu_addr = dma_alloc_coherent(dev, size, &dma_handle, gfp);
where device is a struct device *. This may be called in interrupt
where device is a ``struct device *``. This may be called in interrupt
context with the GFP_ATOMIC flag.
Size is the length of the region you want to allocate, in bytes.
......@@ -415,7 +423,7 @@ exists (for example) to guarantee that if you allocate a chunk
which is smaller than or equal to 64 kilobytes, the extent of the
buffer you receive will not cross a 64K boundary.
To unmap and free such a DMA region, you call:
To unmap and free such a DMA region, you call::
dma_free_coherent(dev, size, cpu_addr, dma_handle);
......@@ -430,7 +438,7 @@ a kmem_cache, but it uses dma_alloc_coherent(), not __get_free_pages().
Also, it understands common hardware constraints for alignment,
like queue heads needing to be aligned on N byte boundaries.
Create a dma_pool like this:
Create a dma_pool like this::
struct dma_pool *pool;
......@@ -444,7 +452,7 @@ pass 0 for boundary; passing 4096 says memory allocated from this pool
must not cross 4KByte boundaries (but at that time it may be better to
use dma_alloc_coherent() directly instead).
Allocate memory from a DMA pool like this:
Allocate memory from a DMA pool like this::
cpu_addr = dma_pool_alloc(pool, flags, &dma_handle);
......@@ -452,7 +460,7 @@ flags are GFP_KERNEL if blocking is permitted (not in_interrupt nor
holding SMP locks), GFP_ATOMIC otherwise. Like dma_alloc_coherent(),
this returns two values, cpu_addr and dma_handle.
Free memory that was allocated from a dma_pool like this:
Free memory that was allocated from a dma_pool like this::
dma_pool_free(pool, cpu_addr, dma_handle);
......@@ -460,7 +468,7 @@ where pool is what you passed to dma_pool_alloc(), and cpu_addr and
dma_handle are the values dma_pool_alloc() returned. This function
may be called in interrupt context.
Destroy a dma_pool by calling:
Destroy a dma_pool by calling::
dma_pool_destroy(pool);
......@@ -468,11 +476,12 @@ Make sure you've called dma_pool_free() for all memory allocated
from a pool before you destroy the pool. This function may not
be called in interrupt context.
DMA Direction
DMA Direction
=============
The interfaces described in subsequent portions of this document
take a DMA direction argument, which is an integer and takes on
one of the following values:
one of the following values::
DMA_BIDIRECTIONAL
DMA_TO_DEVICE
......@@ -521,14 +530,15 @@ packets, map/unmap them with the DMA_TO_DEVICE direction
specifier. For receive packets, just the opposite, map/unmap them
with the DMA_FROM_DEVICE direction specifier.
Using Streaming DMA mappings
Using Streaming DMA mappings
============================
The streaming DMA mapping routines can be called from interrupt
context. There are two versions of each map/unmap, one which will
map/unmap a single memory region, and one which will map/unmap a
scatterlist.
To map a single region, you do:
To map a single region, you do::
struct device *dev = &my_dev->dev;
dma_addr_t dma_handle;
......@@ -545,37 +555,16 @@ To map a single region, you do:
goto map_error_handling;
}
and to unmap it:
and to unmap it::
dma_unmap_single(dev, dma_handle, size, direction);
You should call dma_mapping_error() as dma_map_single() could fail and return
error. Not all DMA implementations support the dma_mapping_error() interface.
However, it is a good practice to call dma_mapping_error() interface, which
will invoke the generic mapping error check interface. Doing so will ensure
that the mapping code will work correctly on all DMA implementations without
any dependency on the specifics of the underlying implementation. Using the
returned address without checking for errors could result in failures ranging
from panics to silent data corruption. A couple of examples of incorrect ways
to check for errors that make assumptions about the underlying DMA
implementation are as follows and these are applicable to dma_map_page() as
well.
Incorrect example 1:
dma_addr_t dma_handle;
dma_handle = dma_map_single(dev, addr, size, direction);
if ((dma_handle & 0xffff != 0) || (dma_handle >= 0x1000000)) {
goto map_error;
}
Incorrect example 2:
dma_addr_t dma_handle;
dma_handle = dma_map_single(dev, addr, size, direction);
if (dma_handle == DMA_ERROR_CODE) {
goto map_error;
}
error. Doing so will ensure that the mapping code will work correctly on all
DMA implementations without any dependency on the specifics of the underlying
implementation. Using the returned address without checking for errors could
result in failures ranging from panics to silent data corruption. The same
applies to dma_map_page() as well.
You should call dma_unmap_single() when the DMA activity is finished, e.g.,
from the interrupt which told you that the DMA transfer is done.
......@@ -584,7 +573,7 @@ Using CPU pointers like this for single mappings has a disadvantage:
you cannot reference HIGHMEM memory in this way. Thus, there is a
map/unmap interface pair akin to dma_{map,unmap}_single(). These
interfaces deal with page/offset pairs instead of CPU pointers.
Specifically:
Specifically::
struct device *dev = &my_dev->dev;
dma_addr_t dma_handle;
......@@ -614,7 +603,7 @@ error as outlined under the dma_map_single() discussion.
You should call dma_unmap_page() when the DMA activity is finished, e.g.,
from the interrupt which told you that the DMA transfer is done.
With scatterlists, you map a region gathered from several regions by:
With scatterlists, you map a region gathered from several regions by::
int i, count = dma_map_sg(dev, sglist, nents, direction);
struct scatterlist *sg;
......@@ -638,16 +627,18 @@ Then you should loop count times (note: this can be less than nents times)
and use sg_dma_address() and sg_dma_len() macros where you previously
accessed sg->address and sg->length as shown above.
To unmap a scatterlist, just call:
To unmap a scatterlist, just call::
dma_unmap_sg(dev, sglist, nents, direction);
Again, make sure DMA activity has already finished.
PLEASE NOTE: The 'nents' argument to the dma_unmap_sg call must be
the _same_ one you passed into the dma_map_sg call,
it should _NOT_ be the 'count' value _returned_ from the
dma_map_sg call.
.. note::
The 'nents' argument to the dma_unmap_sg call must be
the _same_ one you passed into the dma_map_sg call,
it should _NOT_ be the 'count' value _returned_ from the
dma_map_sg call.
Every dma_map_{single,sg}() call should have its dma_unmap_{single,sg}()
counterpart, because the DMA address space is a shared resource and
......@@ -659,11 +650,11 @@ properly in order for the CPU and device to see the most up-to-date and
correct copy of the DMA buffer.
So, firstly, just map it with dma_map_{single,sg}(), and after each DMA
transfer call either:
transfer call either::
dma_sync_single_for_cpu(dev, dma_handle, size, direction);
or:
or::
dma_sync_sg_for_cpu(dev, sglist, nents, direction);
......@@ -671,17 +662,19 @@ as appropriate.
Then, if you wish to let the device get at the DMA area again,
finish accessing the data with the CPU, and then before actually
giving the buffer to the hardware call either:
giving the buffer to the hardware call either::
dma_sync_single_for_device(dev, dma_handle, size, direction);
or:
or::
dma_sync_sg_for_device(dev, sglist, nents, direction);
as appropriate.
PLEASE NOTE: The 'nents' argument to dma_sync_sg_for_cpu() and
.. note::
The 'nents' argument to dma_sync_sg_for_cpu() and
dma_sync_sg_for_device() must be the same passed to
dma_map_sg(). It is _NOT_ the count returned by
dma_map_sg().
......@@ -692,7 +685,7 @@ dma_map_*() call till dma_unmap_*(), then you don't have to call the
dma_sync_*() routines at all.
Here is pseudo code which shows a situation in which you would need
to use the dma_sync_*() interfaces.
to use the dma_sync_*() interfaces::
my_card_setup_receive_buffer(struct my_card *cp, char *buffer, int len)
{
......@@ -768,7 +761,8 @@ is planned to completely remove virt_to_bus() and bus_to_virt() as
they are entirely deprecated. Some ports already do not provide these
as it is impossible to correctly support them.
Handling Errors
Handling Errors
===============
DMA address space is limited on some architectures and an allocation
failure can be determined by:
......@@ -776,7 +770,7 @@ failure can be determined by:
- checking if dma_alloc_coherent() returns NULL or dma_map_sg returns 0
- checking the dma_addr_t returned from dma_map_single() and dma_map_page()
by using dma_mapping_error():
by using dma_mapping_error()::
dma_addr_t dma_handle;
......@@ -794,7 +788,8 @@ failure can be determined by:
of a multiple page mapping attempt. These example are applicable to
dma_map_page() as well.
Example 1:
Example 1::
dma_addr_t dma_handle1;
dma_addr_t dma_handle2;
......@@ -823,8 +818,12 @@ Example 1:
dma_unmap_single(dma_handle1);
map_error_handling1:
Example 2: (if buffers are allocated in a loop, unmap all mapped buffers when
mapping error is detected in the middle)
Example 2::
/*
* if buffers are allocated in a loop, unmap all mapped buffers when
* mapping error is detected in the middle
*/
dma_addr_t dma_addr;
dma_addr_t array[DMA_BUFFERS];
......@@ -867,7 +866,8 @@ SCSI drivers must return SCSI_MLQUEUE_HOST_BUSY if the DMA mapping
fails in the queuecommand hook. This means that the SCSI subsystem
passes the command to the driver again later.
Optimizing Unmap State Space Consumption
Optimizing Unmap State Space Consumption
========================================
On many platforms, dma_unmap_{single,page}() is simply a nop.
Therefore, keeping track of the mapping address and length is a waste
......@@ -879,7 +879,7 @@ Actually, instead of describing the macros one by one, we'll
transform some example code.
1) Use DEFINE_DMA_UNMAP_{ADDR,LEN} in state saving structures.
Example, before:
Example, before::
struct ring_state {
struct sk_buff *skb;
......@@ -887,7 +887,7 @@ transform some example code.
__u32 len;
};
after:
after::
struct ring_state {
struct sk_buff *skb;
......@@ -896,23 +896,23 @@ transform some example code.
};
2) Use dma_unmap_{addr,len}_set() to set these values.
Example, before:
Example, before::
ringp->mapping = FOO;
ringp->len = BAR;
after:
after::
dma_unmap_addr_set(ringp, mapping, FOO);
dma_unmap_len_set(ringp, len, BAR);
3) Use dma_unmap_{addr,len}() to access these values.
Example, before:
Example, before::
dma_unmap_single(dev, ringp->mapping, ringp->len,
DMA_FROM_DEVICE);
after:
after::
dma_unmap_single(dev,
dma_unmap_addr(ringp, mapping),
......@@ -923,7 +923,8 @@ It really should be self-explanatory. We treat the ADDR and LEN
separately, because it is possible for an implementation to only
need the address in order to perform the unmap operation.
Platform Issues
Platform Issues
===============
If you are just writing drivers for Linux and do not maintain
an architecture port for the kernel, you can safely skip down
......@@ -949,12 +950,13 @@ to "Closing".
alignment constraints (e.g. the alignment constraints about 64-bit
objects).
Closing
Closing
=======
This document, and the API itself, would not be in its current
form without the feedback and suggestions from numerous individuals.
We would like to specifically mention, in no particular order, the
following people:
following people::
Russell King <rmk@arm.linux.org.uk>
Leo Dagum <dagum@barrel.engr.sgi.com>
......
Documentation/DMA-API.txt
浏览文件 @ 64282ea2
此差异已折叠。
Documentation/DMA-ISA-LPC.txt
浏览文件 @ 64282ea2
DMA with ISA and LPC devices
============================
============================
DMA with ISA and LPC devices
============================
Pierre Ossman <drzeus@drzeus.cx>
:Author: Pierre Ossman <drzeus@drzeus.cx>
This document describes how to do DMA transfers using the old ISA DMA
controller. Even though ISA is more or less dead today the LPC bus
uses the same DMA system so it will be around for quite some time.
Part I - Headers and dependencies
---------------------------------
Headers and dependencies
------------------------
To do ISA style DMA you need to include two headers:
To do ISA style DMA you need to include two headers::
#include <linux/dma-mapping.h>
#include <asm/dma.h>
#include <linux/dma-mapping.h>
#include <asm/dma.h>
The first is the generic DMA API used to convert virtual addresses to
bus addresses (see Documentation/DMA-API.txt for details).
......@@ -23,8 +24,8 @@ this is not present on all platforms make sure you construct your
Kconfig to be dependent on ISA_DMA_API (not ISA) so that nobody tries
to build your driver on unsupported platforms.
Part II - Buffer allocation
---------------------------
Buffer allocation
-----------------
The ISA DMA controller has some very strict requirements on which
memory it can access so extra care must be taken when allocating
......@@ -42,13 +43,13 @@ requirements you pass the flag GFP_DMA to kmalloc.
Unfortunately the memory available for ISA DMA is scarce so unless you
allocate the memory during boot-up it's a good idea to also pass
__GFP_REPEAT and __GFP_NOWARN to make the allocator try a bit harder.
__GFP_RETRY_MAYFAIL and __GFP_NOWARN to make the allocator try a bit harder.
(This scarcity also means that you should allocate the buffer as
early as possible and not release it until the driver is unloaded.)
Part III - Address translation
------------------------------
Address translation
-------------------
To translate the virtual address to a bus address, use the normal DMA
API. Do _not_ use isa_virt_to_phys() even though it does the same
......@@ -61,8 +62,8 @@ Note: x86_64 had a broken DMA API when it came to ISA but has since
been fixed. If your arch has problems then fix the DMA API instead of
reverting to the ISA functions.
Part IV - Channels
------------------
Channels
--------
A normal ISA DMA controller has 8 channels. The lower four are for
8-bit transfers and the upper four are for 16-bit transfers.
......@@ -80,8 +81,8 @@ The ability to use 16-bit or 8-bit transfers is _not_ up to you as a
driver author but depends on what the hardware supports. Check your
specs or test different channels.
Part V - Transfer data
----------------------
Transfer data
-------------
Now for the good stuff, the actual DMA transfer. :)
......@@ -112,37 +113,37 @@ Once the DMA transfer is finished (or timed out) you should disable
the channel again. You should also check get_dma_residue() to make
sure that all data has been transferred.
Example:
Example::
int flags, residue;
int flags, residue;
flags = claim_dma_lock();
flags = claim_dma_lock();
clear_dma_ff();
clear_dma_ff();
set_dma_mode(channel, DMA_MODE_WRITE);
set_dma_addr(channel, phys_addr);
set_dma_count(channel, num_bytes);
set_dma_mode(channel, DMA_MODE_WRITE);
set_dma_addr(channel, phys_addr);
set_dma_count(channel, num_bytes);
dma_enable(channel);
dma_enable(channel);
release_dma_lock(flags);
release_dma_lock(flags);
while (!device_done());
while (!device_done());
flags = claim_dma_lock();
flags = claim_dma_lock();
dma_disable(channel);
dma_disable(channel);
residue = dma_get_residue(channel);
if (residue != 0)
printk(KERN_ERR "driver: Incomplete DMA transfer!"
" %d bytes left!\n", residue);
residue = dma_get_residue(channel);
if (residue != 0)
printk(KERN_ERR "driver: Incomplete DMA transfer!"
" %d bytes left!\n", residue);
release_dma_lock(flags);
release_dma_lock(flags);
Part VI - Suspend/resume
------------------------
Suspend/resume
--------------
It is the driver's responsibility to make sure that the machine isn't
suspended while a DMA transfer is in progress. Also, all DMA settings
......
Documentation/DMA-attributes.txt
浏览文件 @ 64282ea2
DMA attributes
==============
==============
DMA attributes
==============
This document describes the semantics of the DMA attributes that are
defined in linux/dma-mapping.h.
......@@ -108,6 +109,7 @@ This is a hint to the DMA-mapping subsystem that it's probably not worth
the time to try to allocate memory to in a way that gives better TLB
efficiency (AKA it's not worth trying to build the mapping out of larger
pages). You might want to specify this if:
- You know that the accesses to this memory won't thrash the TLB.
You might know that the accesses are likely to be sequential or
that they aren't sequential but it's unlikely you'll ping-pong
......@@ -121,11 +123,12 @@ pages). You might want to specify this if:
the mapping to have a short lifetime then it may be worth it to
optimize allocation (avoid coming up with large pages) instead of
getting the slight performance win of larger pages.
Setting this hint doesn't guarantee that you won't get huge pages, but it
means that we won't try quite as hard to get them.
NOTE: At the moment DMA_ATTR_ALLOC_SINGLE_PAGES is only implemented on ARM,
though ARM64 patches will likely be posted soon.
.. note:: At the moment DMA_ATTR_ALLOC_SINGLE_PAGES is only implemented on ARM,
though ARM64 patches will likely be posted soon.
DMA_ATTR_NO_WARN
----------------
......@@ -142,10 +145,10 @@ problem at all, depending on the implementation of the retry mechanism.
So, this provides a way for drivers to avoid those error messages on calls
where allocation failures are not a problem, and shouldn't bother the logs.
NOTE: At the moment DMA_ATTR_NO_WARN is only implemented on PowerPC.
.. note:: At the moment DMA_ATTR_NO_WARN is only implemented on PowerPC.
DMA_ATTR_PRIVILEGED
------------------------------
-------------------
Some advanced peripherals such as remote processors and GPUs perform
accesses to DMA buffers in both privileged "supervisor" and unprivileged
......
Documentation/DocBook/.gitignore 已删除 100644 → 0
浏览文件 @ d2939424
*.xml
*.ps
*.pdf
*.html
*.9.gz
*.9
*.aux
*.dvi
*.log
*.out
*.png
*.gif
*.svg
*.proc
*.db
media-indices.tmpl
media-entities.tmpl
Documentation/DocBook/Makefile 已删除 100644 → 0
浏览文件 @ d2939424
###
# This makefile is used to generate the kernel documentation,
# primarily based on in-line comments in various source files.
# See Documentation/kernel-doc-nano-HOWTO.txt for instruction in how
# to document the SRC - and how to read it.
# To add a new book the only step required is to add the book to the
# list of DOCBOOKS.
DOCBOOKS := z8530book.xml \
kernel-hacking.xml kernel-locking.xml \
networking.xml \
filesystems.xml lsm.xml kgdb.xml \
libata.xml mtdnand.xml librs.xml rapidio.xml \
s390-drivers.xml scsi.xml \
sh.xml w1.xml
ifeq ($(DOCBOOKS),)
# Skip DocBook build if the user explicitly requested no DOCBOOKS.
.DEFAULT:
@echo " SKIP DocBook $@ target (DOCBOOKS=\"\" specified)."
else
ifneq ($(SPHINXDIRS),)
# Skip DocBook build if the user explicitly requested a sphinx dir
.DEFAULT:
@echo " SKIP DocBook $@ target (SPHINXDIRS specified)."
else
###
# The build process is as follows (targets):
# (xmldocs) [by docproc]
# file.tmpl --> file.xml +--> file.ps (psdocs) [by db2ps or xmlto]
# +--> file.pdf (pdfdocs) [by db2pdf or xmlto]
# +--> DIR=file (htmldocs) [by xmlto]
# +--> man/ (mandocs) [by xmlto]
# for PDF and PS output you can choose between xmlto and docbook-utils tools
PDF_METHOD = $(prefer-db2x)
PS_METHOD = $(prefer-db2x)
targets += $(DOCBOOKS)
BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
xmldocs: $(BOOKS)
sgmldocs: xmldocs
PS := $(patsubst %.xml, %.ps, $(BOOKS))
psdocs: $(PS)
PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
pdfdocs: $(PDF)
HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
htmldocs: $(HTML)
$(call cmd,build_main_index)
MAN := $(patsubst %.xml, %.9, $(BOOKS))
mandocs: $(MAN)
find $(obj)/man -name '*.9' | xargs gzip -nf
# Default location for installed man pages
export INSTALL_MAN_PATH = $(objtree)/usr
installmandocs: mandocs
mkdir -p $(INSTALL_MAN_PATH)/man/man9/
find $(obj)/man -name '*.9.gz' -printf '%h %f\n' | \
sort -k 2 -k 1 | uniq -f 1 | sed -e 's: :/:' | \
xargs install -m 644 -t $(INSTALL_MAN_PATH)/man/man9/
# no-op for the DocBook toolchain
epubdocs:
latexdocs:
linkcheckdocs:
###
#External programs used
KERNELDOCXMLREF = $(srctree)/scripts/kernel-doc-xml-ref
KERNELDOC = $(srctree)/scripts/kernel-doc
DOCPROC = $(objtree)/scripts/docproc
CHECK_LC_CTYPE = $(objtree)/scripts/check-lc_ctype
# Use a fixed encoding - UTF-8 if the C library has support built-in
# or ASCII if not
LC_CTYPE := $(call try-run, LC_CTYPE=C.UTF-8 $(CHECK_LC_CTYPE),C.UTF-8,C)
export LC_CTYPE
XMLTOFLAGS = -m $(srctree)/$(src)/stylesheet.xsl
XMLTOFLAGS += --skip-validation
###
# DOCPROC is used for two purposes:
# 1) To generate a dependency list for a .tmpl file
# 2) To preprocess a .tmpl file and call kernel-doc with
# appropriate parameters.
# The following rules are used to generate the .xml documentation
# required to generate the final targets. (ps, pdf, html).
quiet_cmd_docproc = DOCPROC $@
cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
define rule_docproc
set -e; \
$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
$(cmd_$(1)); \
( \
echo 'cmd_$@ := $(cmd_$(1))'; \
echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`; \
) > $(dir $@).$(notdir $@).cmd
endef
%.xml: %.tmpl $(KERNELDOC) $(DOCPROC) $(KERNELDOCXMLREF) FORCE
$(call if_changed_rule,docproc)
# Tell kbuild to always build the programs
always := $(hostprogs-y)
notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
exit 1
db2xtemplate = db2TYPE -o $(dir $@) $<
xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
# determine which methods are available
ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
use-db2x = db2x
prefer-db2x = db2x
else
use-db2x = notfound
prefer-db2x = $(use-xmlto)
endif
ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
use-xmlto = xmlto
prefer-xmlto = xmlto
else
use-xmlto = notfound
prefer-xmlto = $(use-db2x)
endif
# the commands, generated from the chosen template
quiet_cmd_db2ps = PS $@
cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
%.ps : %.xml
$(call cmd,db2ps)
quiet_cmd_db2pdf = PDF $@
cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
%.pdf : %.xml
$(call cmd,db2pdf)
index = index.html
main_idx = $(obj)/$(index)
quiet_cmd_build_main_index = HTML $(main_idx)
cmd_build_main_index = rm -rf $(main_idx); \
echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
cat $(HTML) >> $(main_idx)
quiet_cmd_db2html = HTML $@
cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
$(patsubst %.html,%,$(notdir $@))</a><p>' > $@
###
# Rules to create an aux XML and .db, and use them to re-process the DocBook XML
# to fill internal hyperlinks
gen_aux_xml = :
quiet_gen_aux_xml = echo ' XMLREF $@'
silent_gen_aux_xml = :
%.aux.xml: %.xml
@$($(quiet)gen_aux_xml)
@rm -rf $@
@(cat $< | egrep "^<refentry id" | egrep -o "\".*\"" | cut -f 2 -d \" > $<.db)
@$(KERNELDOCXMLREF) -db $<.db $< > $@
.PRECIOUS: %.aux.xml
%.html: %.aux.xml
@(which xmlto > /dev/null 2>&1) || \
(echo "*** You need to install xmlto ***"; \
exit 1)
@rm -rf $@ $(patsubst %.html,%,$@)
$(call cmd,db2html)
@if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
quiet_cmd_db2man = MAN $@
cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man/$(*F) $< ; fi
%.9 : %.xml
@(which xmlto > /dev/null 2>&1) || \
(echo "*** You need to install xmlto ***"; \
exit 1)
$(Q)mkdir -p $(obj)/man/$(*F)
$(call cmd,db2man)
@touch $@
###
# Rules to generate postscripts and PNG images from .fig format files
quiet_cmd_fig2eps = FIG2EPS $@
cmd_fig2eps = fig2dev -Leps $< $@
%.eps: %.fig
@(which fig2dev > /dev/null 2>&1) || \
(echo "*** You need to install transfig ***"; \
exit 1)
$(call cmd,fig2eps)
quiet_cmd_fig2png = FIG2PNG $@
cmd_fig2png = fig2dev -Lpng $< $@
%.png: %.fig
@(which fig2dev > /dev/null 2>&1) || \
(echo "*** You need to install transfig ***"; \
exit 1)
$(call cmd,fig2png)
###
# Rule to convert a .c file to inline XML documentation
gen_xml = :
quiet_gen_xml = echo ' GEN $@'
silent_gen_xml = :
%.xml: %.c
@$($(quiet)gen_xml)
@( \
echo "<programlisting>"; \
expand --tabs=8 < $< | \
sed -e "s/&/\\&amp;/g" \
-e "s/</\\&lt;/g" \
-e "s/>/\\&gt;/g"; \
echo "</programlisting>") > $@
endif # DOCBOOKS=""
endif # SPHINDIR=...
###
# Help targets as used by the top-level makefile
dochelp:
@echo ' Linux kernel internal documentation in different formats (DocBook):'
@echo ' htmldocs - HTML'
@echo ' pdfdocs - PDF'
@echo ' psdocs - Postscript'
@echo ' xmldocs - XML DocBook'
@echo ' mandocs - man pages'
@echo ' installmandocs - install man pages generated by mandocs to INSTALL_MAN_PATH'; \
echo ' (default: $(INSTALL_MAN_PATH))'; \
echo ''
@echo ' cleandocs - clean all generated DocBook files'
@echo
@echo ' make DOCBOOKS="s1.xml s2.xml" [target] Generate only docs s1.xml s2.xml'
@echo ' valid values for DOCBOOKS are: $(DOCBOOKS)'
@echo
@echo " make DOCBOOKS=\"\" [target] Don't generate docs from Docbook"
@echo ' This is useful to generate only the ReST docs (Sphinx)'
###
# Temporary files left by various tools
clean-files := $(DOCBOOKS) \
$(patsubst %.xml, %.dvi, $(DOCBOOKS)) \
$(patsubst %.xml, %.aux, $(DOCBOOKS)) \
$(patsubst %.xml, %.tex, $(DOCBOOKS)) \
$(patsubst %.xml, %.log, $(DOCBOOKS)) \
$(patsubst %.xml, %.out, $(DOCBOOKS)) \
$(patsubst %.xml, %.ps, $(DOCBOOKS)) \
$(patsubst %.xml, %.pdf, $(DOCBOOKS)) \
$(patsubst %.xml, %.html, $(DOCBOOKS)) \
$(patsubst %.xml, %.9, $(DOCBOOKS)) \
$(patsubst %.xml, %.aux.xml, $(DOCBOOKS)) \
$(patsubst %.xml, %.xml.db, $(DOCBOOKS)) \
$(patsubst %.xml, %.xml, $(DOCBOOKS)) \
$(patsubst %.xml, .%.xml.cmd, $(DOCBOOKS)) \
$(index)
clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
cleandocs:
$(Q)rm -f $(call objectify, $(clean-files))
$(Q)rm -rf $(call objectify, $(clean-dirs))
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable so we can use it in if_changed and friends.
.PHONY: $(PHONY)
Documentation/DocBook/filesystems.tmpl 已删除 100644 → 0
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="Linux-filesystems-API">
<bookinfo>
<title>Linux Filesystems API</title>
<legalnotice>
<para>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
version.
</para>
<para>
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
</para>
<para>
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
</para>
<para>
For more details see the file COPYING in the source
distribution of Linux.
</para>
</legalnotice>
</bookinfo>
<toc></toc>
<chapter id="vfs">
<title>The Linux VFS</title>
<sect1 id="the_filesystem_types"><title>The Filesystem types</title>
!Iinclude/linux/fs.h
</sect1>
<sect1 id="the_directory_cache"><title>The Directory Cache</title>
!Efs/dcache.c
!Iinclude/linux/dcache.h
</sect1>
<sect1 id="inode_handling"><title>Inode Handling</title>
!Efs/inode.c
!Efs/bad_inode.c
</sect1>
<sect1 id="registration_and_superblocks"><title>Registration and Superblocks</title>
!Efs/super.c
</sect1>
<sect1 id="file_locks"><title>File Locks</title>
!Efs/locks.c
!Ifs/locks.c
</sect1>
<sect1 id="other_functions"><title>Other Functions</title>
!Efs/mpage.c
!Efs/namei.c
!Efs/buffer.c
!Eblock/bio.c
!Efs/seq_file.c
!Efs/filesystems.c
!Efs/fs-writeback.c
!Efs/block_dev.c
</sect1>
</chapter>
<chapter id="proc">
<title>The proc filesystem</title>
<sect1 id="sysctl_interface"><title>sysctl interface</title>
!Ekernel/sysctl.c
</sect1>
<sect1 id="proc_filesystem_interface"><title>proc filesystem interface</title>
!Ifs/proc/base.c
</sect1>
</chapter>
<chapter id="fs_events">
<title>Events based on file descriptors</title>
!Efs/eventfd.c
</chapter>
<chapter id="sysfs">
<title>The Filesystem for Exporting Kernel Objects</title>
!Efs/sysfs/file.c
!Efs/sysfs/symlink.c
</chapter>
<chapter id="debugfs">
<title>The debugfs filesystem</title>
<sect1 id="debugfs_interface"><title>debugfs interface</title>
!Efs/debugfs/inode.c
!Efs/debugfs/file.c
</sect1>
</chapter>
<chapter id="LinuxJDBAPI">
<chapterinfo>
<title>The Linux Journalling API</title>
<authorgroup>
<author>
<firstname>Roger</firstname>
<surname>Gammans</surname>
<affiliation>
<address>
<email>rgammans@computer-surgery.co.uk</email>
</address>
</affiliation>
</author>
</authorgroup>
<authorgroup>
<author>
<firstname>Stephen</firstname>
<surname>Tweedie</surname>
<affiliation>
<address>
<email>sct@redhat.com</email>
</address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2002</year>
<holder>Roger Gammans</holder>
</copyright>
</chapterinfo>
<title>The Linux Journalling API</title>
<sect1 id="journaling_overview">
<title>Overview</title>
<sect2 id="journaling_details">
<title>Details</title>
<para>
The journalling layer is easy to use. You need to
first of all create a journal_t data structure. There are
two calls to do this dependent on how you decide to allocate the physical
media on which the journal resides. The jbd2_journal_init_inode() call
is for journals stored in filesystem inodes, or the jbd2_journal_init_dev()
call can be used for journal stored on a raw device (in a continuous range
of blocks). A journal_t is a typedef for a struct pointer, so when
you are finally finished make sure you call jbd2_journal_destroy() on it
to free up any used kernel memory.
</para>
<para>
Once you have got your journal_t object you need to 'mount' or load the journal
file. The journalling layer expects the space for the journal was already
allocated and initialized properly by the userspace tools. When loading the
journal you must call jbd2_journal_load() to process journal contents. If the
client file system detects the journal contents does not need to be processed
(or even need not have valid contents), it may call jbd2_journal_wipe() to
clear the journal contents before calling jbd2_journal_load().
</para>
<para>
Note that jbd2_journal_wipe(..,0) calls jbd2_journal_skip_recovery() for you if
it detects any outstanding transactions in the journal and similarly
jbd2_journal_load() will call jbd2_journal_recover() if necessary. I would
advise reading ext4_load_journal() in fs/ext4/super.c for examples on this
stage.
</para>
<para>
Now you can go ahead and start modifying the underlying
filesystem. Almost.
</para>
<para>
You still need to actually journal your filesystem changes, this
is done by wrapping them into transactions. Additionally you
also need to wrap the modification of each of the buffers
with calls to the journal layer, so it knows what the modifications
you are actually making are. To do this use jbd2_journal_start() which
returns a transaction handle.
</para>
<para>
jbd2_journal_start()
and its counterpart jbd2_journal_stop(), which indicates the end of a
transaction are nestable calls, so you can reenter a transaction if necessary,
but remember you must call jbd2_journal_stop() the same number of times as
jbd2_journal_start() before the transaction is completed (or more accurately
leaves the update phase). Ext4/VFS makes use of this feature to simplify
handling of inode dirtying, quota support, etc.
</para>
<para>
Inside each transaction you need to wrap the modifications to the
individual buffers (blocks). Before you start to modify a buffer you
need to call jbd2_journal_get_{create,write,undo}_access() as appropriate,
this allows the journalling layer to copy the unmodified data if it
needs to. After all the buffer may be part of a previously uncommitted
transaction.
At this point you are at last ready to modify a buffer, and once
you are have done so you need to call jbd2_journal_dirty_{meta,}data().
Or if you've asked for access to a buffer you now know is now longer
required to be pushed back on the device you can call jbd2_journal_forget()
in much the same way as you might have used bforget() in the past.
</para>
<para>
A jbd2_journal_flush() may be called at any time to commit and checkpoint
all your transactions.
</para>
<para>
Then at umount time , in your put_super() you can then call jbd2_journal_destroy()
to clean up your in-core journal object.
</para>
<para>
Unfortunately there a couple of ways the journal layer can cause a deadlock.
The first thing to note is that each task can only have
a single outstanding transaction at any one time, remember nothing
commits until the outermost jbd2_journal_stop(). This means
you must complete the transaction at the end of each file/inode/address
etc. operation you perform, so that the journalling system isn't re-entered
on another journal. Since transactions can't be nested/batched
across differing journals, and another filesystem other than
yours (say ext4) may be modified in a later syscall.
</para>
<para>
The second case to bear in mind is that jbd2_journal_start() can
block if there isn't enough space in the journal for your transaction
(based on the passed nblocks param) - when it blocks it merely(!) needs to
wait for transactions to complete and be committed from other tasks,
so essentially we are waiting for jbd2_journal_stop(). So to avoid
deadlocks you must treat jbd2_journal_start/stop() as if they
were semaphores and include them in your semaphore ordering rules to prevent
deadlocks. Note that jbd2_journal_extend() has similar blocking behaviour to
jbd2_journal_start() so you can deadlock here just as easily as on
jbd2_journal_start().
</para>
<para>
Try to reserve the right number of blocks the first time. ;-). This will
be the maximum number of blocks you are going to touch in this transaction.
I advise having a look at at least ext4_jbd.h to see the basis on which
ext4 uses to make these decisions.
</para>
<para>
Another wriggle to watch out for is your on-disk block allocation strategy.
Why? Because, if you do a delete, you need to ensure you haven't reused any
of the freed blocks until the transaction freeing these blocks commits. If you
reused these blocks and crash happens, there is no way to restore the contents
of the reallocated blocks at the end of the last fully committed transaction.
One simple way of doing this is to mark blocks as free in internal in-memory
block allocation structures only after the transaction freeing them commits.
Ext4 uses journal commit callback for this purpose.
</para>
<para>
With journal commit callbacks you can ask the journalling layer to call a
callback function when the transaction is finally committed to disk, so that
you can do some of your own management. You ask the journalling layer for
calling the callback by simply setting journal->j_commit_callback function
pointer and that function is called after each transaction commit. You can also
use transaction->t_private_list for attaching entries to a transaction that
need processing when the transaction commits.
</para>
<para>
JBD2 also provides a way to block all transaction updates via
jbd2_journal_{un,}lock_updates(). Ext4 uses this when it wants a window with a
clean and stable fs for a moment. E.g.
</para>
<programlisting>
jbd2_journal_lock_updates() //stop new stuff happening..
jbd2_journal_flush() // checkpoint everything.
..do stuff on stable fs
jbd2_journal_unlock_updates() // carry on with filesystem use.
</programlisting>
<para>
The opportunities for abuse and DOS attacks with this should be obvious,
if you allow unprivileged userspace to trigger codepaths containing these
calls.
</para>
</sect2>
<sect2 id="jbd_summary">
<title>Summary</title>
<para>
Using the journal is a matter of wrapping the different context changes,
being each mount, each modification (transaction) and each changed buffer
to tell the journalling layer about them.
</para>
</sect2>
</sect1>
<sect1 id="data_types">
<title>Data Types</title>
<para>
The journalling layer uses typedefs to 'hide' the concrete definitions
of the structures used. As a client of the JBD2 layer you can
just rely on the using the pointer as a magic cookie of some sort.
Obviously the hiding is not enforced as this is 'C'.
</para>
<sect2 id="structures"><title>Structures</title>
!Iinclude/linux/jbd2.h
</sect2>
</sect1>
<sect1 id="functions">
<title>Functions</title>
<para>
The functions here are split into two groups those that
affect a journal as a whole, and those which are used to
manage transactions
</para>
<sect2 id="journal_level"><title>Journal Level</title>
!Efs/jbd2/journal.c
!Ifs/jbd2/recovery.c
</sect2>
<sect2 id="transaction_level"><title>Transasction Level</title>
!Efs/jbd2/transaction.c
</sect2>
</sect1>
<sect1 id="see_also">
<title>See also</title>
<para>
<citation>
<ulink url="http://kernel.org/pub/linux/kernel/people/sct/ext3/journal-design.ps.gz">
Journaling the Linux ext2fs Filesystem, LinuxExpo 98, Stephen Tweedie
</ulink>
</citation>
</para>
<para>
<citation>
<ulink url="http://olstrans.sourceforge.net/release/OLS2000-ext3/OLS2000-ext3.html">
Ext3 Journalling FileSystem, OLS 2000, Dr. Stephen Tweedie
</ulink>
</citation>
</para>
</sect1>
</chapter>
<chapter id="splice">
<title>splice API</title>
<para>
splice is a method for moving blocks of data around inside the
kernel, without continually transferring them between the kernel
and user space.
</para>
!Ffs/splice.c
</chapter>
<chapter id="pipes">
<title>pipes API</title>
<para>
Pipe interfaces are all for in-kernel (builtin image) use.
They are not exported for use by modules.
</para>
!Iinclude/linux/pipe_fs_i.h
!Ffs/pipe.c
</chapter>
</book>
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="Reed-Solomon-Library-Guide">
<bookinfo>
<title>Reed-Solomon Library Programming Interface</title>
<authorgroup>
<author>
<firstname>Thomas</firstname>
<surname>Gleixner</surname>
<affiliation>
<address>
<email>tglx@linutronix.de</email>
</address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2004</year>
<holder>Thomas Gleixner</holder>
</copyright>
<legalnotice>
<para>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License version 2 as published by the Free Software Foundation.
</para>
<para>
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
</para>
<para>
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
</para>
<para>
For more details see the file COPYING in the source
distribution of Linux.
</para>
</legalnotice>
</bookinfo>
<toc></toc>
<chapter id="intro">
<title>Introduction</title>
<para>
The generic Reed-Solomon Library provides encoding, decoding
and error correction functions.
</para>
<para>
Reed-Solomon codes are used in communication and storage
applications to ensure data integrity.
</para>
<para>
This documentation is provided for developers who want to utilize
the functions provided by the library.
</para>
</chapter>
<chapter id="bugs">
<title>Known Bugs And Assumptions</title>
<para>
None.
</para>
</chapter>
<chapter id="usage">
<title>Usage</title>
<para>
This chapter provides examples of how to use the library.
</para>
<sect1>
<title>Initializing</title>
<para>
The init function init_rs returns a pointer to an
rs decoder structure, which holds the necessary
information for encoding, decoding and error correction
with the given polynomial. It either uses an existing
matching decoder or creates a new one. On creation all
the lookup tables for fast en/decoding are created.
The function may take a while, so make sure not to
call it in critical code paths.
</para>
<programlisting>
/* the Reed Solomon control structure */
static struct rs_control *rs_decoder;
/* Symbolsize is 10 (bits)
* Primitive polynomial is x^10+x^3+1
* first consecutive root is 0
* primitive element to generate roots = 1
* generator polynomial degree (number of roots) = 6
*/
rs_decoder = init_rs (10, 0x409, 0, 1, 6);
</programlisting>
</sect1>
<sect1>
<title>Encoding</title>
<para>
The encoder calculates the Reed-Solomon code over
the given data length and stores the result in
the parity buffer. Note that the parity buffer must
be initialized before calling the encoder.
</para>
<para>
The expanded data can be inverted on the fly by
providing a non-zero inversion mask. The expanded data is
XOR'ed with the mask. This is used e.g. for FLASH
ECC, where the all 0xFF is inverted to an all 0x00.
The Reed-Solomon code for all 0x00 is all 0x00. The
code is inverted before storing to FLASH so it is 0xFF
too. This prevents that reading from an erased FLASH
results in ECC errors.
</para>
<para>
The databytes are expanded to the given symbol size
on the fly. There is no support for encoding continuous
bitstreams with a symbol size != 8 at the moment. If
it is necessary it should be not a big deal to implement
such functionality.
</para>
<programlisting>
/* Parity buffer. Size = number of roots */
uint16_t par[6];
/* Initialize the parity buffer */
memset(par, 0, sizeof(par));
/* Encode 512 byte in data8. Store parity in buffer par */
encode_rs8 (rs_decoder, data8, 512, par, 0);
</programlisting>
</sect1>
<sect1>
<title>Decoding</title>
<para>
The decoder calculates the syndrome over
the given data length and the received parity symbols
and corrects errors in the data.
</para>
<para>
If a syndrome is available from a hardware decoder
then the syndrome calculation is skipped.
</para>
<para>
The correction of the data buffer can be suppressed
by providing a correction pattern buffer and an error
location buffer to the decoder. The decoder stores the
calculated error location and the correction bitmask
in the given buffers. This is useful for hardware
decoders which use a weird bit ordering scheme.
</para>
<para>
The databytes are expanded to the given symbol size
on the fly. There is no support for decoding continuous
bitstreams with a symbolsize != 8 at the moment. If
it is necessary it should be not a big deal to implement
such functionality.
</para>
<sect2>
<title>
Decoding with syndrome calculation, direct data correction
</title>
<programlisting>
/* Parity buffer. Size = number of roots */
uint16_t par[6];
uint8_t data[512];
int numerr;
/* Receive data */
.....
/* Receive parity */
.....
/* Decode 512 byte in data8.*/
numerr = decode_rs8 (rs_decoder, data8, par, 512, NULL, 0, NULL, 0, NULL);
</programlisting>
</sect2>
<sect2>
<title>
Decoding with syndrome given by hardware decoder, direct data correction
</title>
<programlisting>
/* Parity buffer. Size = number of roots */
uint16_t par[6], syn[6];
uint8_t data[512];
int numerr;
/* Receive data */
.....
/* Receive parity */
.....
/* Get syndrome from hardware decoder */
.....
/* Decode 512 byte in data8.*/
numerr = decode_rs8 (rs_decoder, data8, par, 512, syn, 0, NULL, 0, NULL);
</programlisting>
</sect2>
<sect2>
<title>
Decoding with syndrome given by hardware decoder, no direct data correction.
</title>
<para>
Note: It's not necessary to give data and received parity to the decoder.
</para>
<programlisting>
/* Parity buffer. Size = number of roots */
uint16_t par[6], syn[6], corr[8];
uint8_t data[512];
int numerr, errpos[8];
/* Receive data */
.....
/* Receive parity */
.....
/* Get syndrome from hardware decoder */
.....
/* Decode 512 byte in data8.*/
numerr = decode_rs8 (rs_decoder, NULL, NULL, 512, syn, 0, errpos, 0, corr);
for (i = 0; i &lt; numerr; i++) {
do_error_correction_in_your_buffer(errpos[i], corr[i]);
}
</programlisting>
</sect2>
</sect1>
<sect1>
<title>Cleanup</title>
<para>
The function free_rs frees the allocated resources,
if the caller is the last user of the decoder.
</para>
<programlisting>
/* Release resources */
free_rs(rs_decoder);
</programlisting>
</sect1>
</chapter>
<chapter id="structs">
<title>Structures</title>
<para>
This chapter contains the autogenerated documentation of the structures which are
used in the Reed-Solomon Library and are relevant for a developer.
</para>
!Iinclude/linux/rslib.h
</chapter>
<chapter id="pubfunctions">
<title>Public Functions Provided</title>
<para>
This chapter contains the autogenerated documentation of the Reed-Solomon functions
which are exported.
</para>
!Elib/reed_solomon/reed_solomon.c
</chapter>
<chapter id="credits">
<title>Credits</title>
<para>
The library code for encoding and decoding was written by Phil Karn.
</para>
<programlisting>
Copyright 2002, Phil Karn, KA9Q
May be used under the terms of the GNU General Public License (GPL)
</programlisting>
<para>
The wrapper functions and interfaces are written by Thomas Gleixner.
</para>
<para>
Many users have provided bugfixes, improvements and helping hands for testing.
Thanks a lot.
</para>
<para>
The following people have contributed to this document:
</para>
<para>
Thomas Gleixner<email>tglx@linutronix.de</email>
</para>
</chapter>
</book>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<article class="whitepaper" id="LinuxSecurityModule" lang="en">
<articleinfo>
<title>Linux Security Modules: General Security Hooks for Linux</title>
<authorgroup>
<author>
<firstname>Stephen</firstname>
<surname>Smalley</surname>
<affiliation>
<orgname>NAI Labs</orgname>
<address><email>ssmalley@nai.com</email></address>
</affiliation>
</author>
<author>
<firstname>Timothy</firstname>
<surname>Fraser</surname>
<affiliation>
<orgname>NAI Labs</orgname>
<address><email>tfraser@nai.com</email></address>
</affiliation>
</author>
<author>
<firstname>Chris</firstname>
<surname>Vance</surname>
<affiliation>
<orgname>NAI Labs</orgname>
<address><email>cvance@nai.com</email></address>
</affiliation>
</author>
</authorgroup>
</articleinfo>
<sect1 id="Introduction"><title>Introduction</title>
<para>
In March 2001, the National Security Agency (NSA) gave a presentation
about Security-Enhanced Linux (SELinux) at the 2.5 Linux Kernel
Summit. SELinux is an implementation of flexible and fine-grained
nondiscretionary access controls in the Linux kernel, originally
implemented as its own particular kernel patch. Several other
security projects (e.g. RSBAC, Medusa) have also developed flexible
access control architectures for the Linux kernel, and various
projects have developed particular access control models for Linux
(e.g. LIDS, DTE, SubDomain). Each project has developed and
maintained its own kernel patch to support its security needs.
</para>
<para>
In response to the NSA presentation, Linus Torvalds made a set of
remarks that described a security framework he would be willing to
consider for inclusion in the mainstream Linux kernel. He described a
general framework that would provide a set of security hooks to
control operations on kernel objects and a set of opaque security
fields in kernel data structures for maintaining security attributes.
This framework could then be used by loadable kernel modules to
implement any desired model of security. Linus also suggested the
possibility of migrating the Linux capabilities code into such a
module.
</para>
<para>
The Linux Security Modules (LSM) project was started by WireX to
develop such a framework. LSM is a joint development effort by
several security projects, including Immunix, SELinux, SGI and Janus,
and several individuals, including Greg Kroah-Hartman and James
Morris, to develop a Linux kernel patch that implements this
framework. The patch is currently tracking the 2.4 series and is
targeted for integration into the 2.5 development series. This
technical report provides an overview of the framework and the example
capabilities security module provided by the LSM kernel patch.
</para>
</sect1>
<sect1 id="framework"><title>LSM Framework</title>
<para>
The LSM kernel patch provides a general kernel framework to support
security modules. In particular, the LSM framework is primarily
focused on supporting access control modules, although future
development is likely to address other security needs such as
auditing. By itself, the framework does not provide any additional
security; it merely provides the infrastructure to support security
modules. The LSM kernel patch also moves most of the capabilities
logic into an optional security module, with the system defaulting
to the traditional superuser logic. This capabilities module
is discussed further in <xref linkend="cap"/>.
</para>
<para>
The LSM kernel patch adds security fields to kernel data structures
and inserts calls to hook functions at critical points in the kernel
code to manage the security fields and to perform access control. It
also adds functions for registering and unregistering security
modules, and adds a general <function>security</function> system call
to support new system calls for security-aware applications.
</para>
<para>
The LSM security fields are simply <type>void*</type> pointers. For
process and program execution security information, security fields
were added to <structname>struct task_struct</structname> and
<structname>struct linux_binprm</structname>. For filesystem security
information, a security field was added to
<structname>struct super_block</structname>. For pipe, file, and socket
security information, security fields were added to
<structname>struct inode</structname> and
<structname>struct file</structname>. For packet and network device security
information, security fields were added to
<structname>struct sk_buff</structname> and
<structname>struct net_device</structname>. For System V IPC security
information, security fields were added to
<structname>struct kern_ipc_perm</structname> and
<structname>struct msg_msg</structname>; additionally, the definitions
for <structname>struct msg_msg</structname>, <structname>struct
msg_queue</structname>, and <structname>struct
shmid_kernel</structname> were moved to header files
(<filename>include/linux/msg.h</filename> and
<filename>include/linux/shm.h</filename> as appropriate) to allow
the security modules to use these definitions.
</para>
<para>
Each LSM hook is a function pointer in a global table,
security_ops. This table is a
<structname>security_operations</structname> structure as defined by
<filename>include/linux/security.h</filename>. Detailed documentation
for each hook is included in this header file. At present, this
structure consists of a collection of substructures that group related
hooks based on the kernel object (e.g. task, inode, file, sk_buff,
etc) as well as some top-level hook function pointers for system
operations. This structure is likely to be flattened in the future
for performance. The placement of the hook calls in the kernel code
is described by the "called:" lines in the per-hook documentation in
the header file. The hook calls can also be easily found in the
kernel code by looking for the string "security_ops->".
</para>
<para>
Linus mentioned per-process security hooks in his original remarks as a
possible alternative to global security hooks. However, if LSM were
to start from the perspective of per-process hooks, then the base
framework would have to deal with how to handle operations that
involve multiple processes (e.g. kill), since each process might have
its own hook for controlling the operation. This would require a
general mechanism for composing hooks in the base framework.
Additionally, LSM would still need global hooks for operations that
have no process context (e.g. network input operations).
Consequently, LSM provides global security hooks, but a security
module is free to implement per-process hooks (where that makes sense)
by storing a security_ops table in each process' security field and
then invoking these per-process hooks from the global hooks.
The problem of composition is thus deferred to the module.
</para>
<para>
The global security_ops table is initialized to a set of hook
functions provided by a dummy security module that provides
traditional superuser logic. A <function>register_security</function>
function (in <filename>security/security.c</filename>) is provided to
allow a security module to set security_ops to refer to its own hook
functions, and an <function>unregister_security</function> function is
provided to revert security_ops to the dummy module hooks. This
mechanism is used to set the primary security module, which is
responsible for making the final decision for each hook.
</para>
<para>
LSM also provides a simple mechanism for stacking additional security
modules with the primary security module. It defines
<function>register_security</function> and
<function>unregister_security</function> hooks in the
<structname>security_operations</structname> structure and provides
<function>mod_reg_security</function> and
<function>mod_unreg_security</function> functions that invoke these
hooks after performing some sanity checking. A security module can
call these functions in order to stack with other modules. However,
the actual details of how this stacking is handled are deferred to the
module, which can implement these hooks in any way it wishes
(including always returning an error if it does not wish to support
stacking). In this manner, LSM again defers the problem of
composition to the module.
</para>
<para>
Although the LSM hooks are organized into substructures based on
kernel object, all of the hooks can be viewed as falling into two
major categories: hooks that are used to manage the security fields
and hooks that are used to perform access control. Examples of the
first category of hooks include the
<function>alloc_security</function> and
<function>free_security</function> hooks defined for each kernel data
structure that has a security field. These hooks are used to allocate
and free security structures for kernel objects. The first category
of hooks also includes hooks that set information in the security
field after allocation, such as the <function>post_lookup</function>
hook in <structname>struct inode_security_ops</structname>. This hook
is used to set security information for inodes after successful lookup
operations. An example of the second category of hooks is the
<function>permission</function> hook in
<structname>struct inode_security_ops</structname>. This hook checks
permission when accessing an inode.
</para>
</sect1>
<sect1 id="cap"><title>LSM Capabilities Module</title>
<para>
The LSM kernel patch moves most of the existing POSIX.1e capabilities
logic into an optional security module stored in the file
<filename>security/capability.c</filename>. This change allows
users who do not want to use capabilities to omit this code entirely
from their kernel, instead using the dummy module for traditional
superuser logic or any other module that they desire. This change
also allows the developers of the capabilities logic to maintain and
enhance their code more freely, without needing to integrate patches
back into the base kernel.
</para>
<para>
In addition to moving the capabilities logic, the LSM kernel patch
could move the capability-related fields from the kernel data
structures into the new security fields managed by the security
modules. However, at present, the LSM kernel patch leaves the
capability fields in the kernel data structures. In his original
remarks, Linus suggested that this might be preferable so that other
security modules can be easily stacked with the capabilities module
without needing to chain multiple security structures on the security field.
It also avoids imposing extra overhead on the capabilities module
to manage the security fields. However, the LSM framework could
certainly support such a move if it is determined to be desirable,
with only a few additional changes described below.
</para>
<para>
At present, the capabilities logic for computing process capabilities
on <function>execve</function> and <function>set*uid</function>,
checking capabilities for a particular process, saving and checking
capabilities for netlink messages, and handling the
<function>capget</function> and <function>capset</function> system
calls have been moved into the capabilities module. There are still a
few locations in the base kernel where capability-related fields are
directly examined or modified, but the current version of the LSM
patch does allow a security module to completely replace the
assignment and testing of capabilities. These few locations would
need to be changed if the capability-related fields were moved into
the security field. The following is a list of known locations that
still perform such direct examination or modification of
capability-related fields:
<itemizedlist>
<listitem><para><filename>fs/open.c</filename>:<function>sys_access</function></para></listitem>
<listitem><para><filename>fs/lockd/host.c</filename>:<function>nlm_bind_host</function></para></listitem>
<listitem><para><filename>fs/nfsd/auth.c</filename>:<function>nfsd_setuser</function></para></listitem>
<listitem><para><filename>fs/proc/array.c</filename>:<function>task_cap</function></para></listitem>
</itemizedlist>
</para>
</sect1>
</article>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="LinuxNetworking">
<bookinfo>
<title>Linux Networking and Network Devices APIs</title>
<legalnotice>
<para>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
version.
</para>
<para>
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
</para>
<para>
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
</para>
<para>
For more details see the file COPYING in the source
distribution of Linux.
</para>
</legalnotice>
</bookinfo>
<toc></toc>
<chapter id="netcore">
<title>Linux Networking</title>
<sect1><title>Networking Base Types</title>
!Iinclude/linux/net.h
</sect1>
<sect1><title>Socket Buffer Functions</title>
!Iinclude/linux/skbuff.h
!Iinclude/net/sock.h
!Enet/socket.c
!Enet/core/skbuff.c
!Enet/core/sock.c
!Enet/core/datagram.c
!Enet/core/stream.c
</sect1>
<sect1><title>Socket Filter</title>
!Enet/core/filter.c
</sect1>
<sect1><title>Generic Network Statistics</title>
!Iinclude/uapi/linux/gen_stats.h
!Enet/core/gen_stats.c
!Enet/core/gen_estimator.c
</sect1>
<sect1><title>SUN RPC subsystem</title>
<!-- The !D functionality is not perfect, garbage has to be protected by comments
!Dnet/sunrpc/sunrpc_syms.c
-->
!Enet/sunrpc/xdr.c
!Enet/sunrpc/svc_xprt.c
!Enet/sunrpc/xprt.c
!Enet/sunrpc/sched.c
!Enet/sunrpc/socklib.c
!Enet/sunrpc/stats.c
!Enet/sunrpc/rpc_pipe.c
!Enet/sunrpc/rpcb_clnt.c
!Enet/sunrpc/clnt.c
</sect1>
<sect1><title>WiMAX</title>
!Enet/wimax/op-msg.c
!Enet/wimax/op-reset.c
!Enet/wimax/op-rfkill.c
!Enet/wimax/stack.c
!Iinclude/net/wimax.h
!Iinclude/uapi/linux/wimax.h
</sect1>
</chapter>
<chapter id="netdev">
<title>Network device support</title>
<sect1><title>Driver Support</title>
!Enet/core/dev.c
!Enet/ethernet/eth.c
!Enet/sched/sch_generic.c
!Iinclude/linux/etherdevice.h
!Iinclude/linux/netdevice.h
</sect1>
<sect1><title>PHY Support</title>
!Edrivers/net/phy/phy.c
!Idrivers/net/phy/phy.c
!Edrivers/net/phy/phy_device.c
!Idrivers/net/phy/phy_device.c
!Edrivers/net/phy/mdio_bus.c
!Idrivers/net/phy/mdio_bus.c
</sect1>
<!-- FIXME: Removed for now since no structured comments in source
<sect1><title>Wireless</title>
X!Enet/core/wireless.c
</sect1>
-->
</chapter>
</book>
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<param name="callout.graphics">0</param>
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===============
What is an IRQ?
===============
An IRQ is an interrupt request from a device.
Currently they can come in over a pin, or over a packet.
......
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......@@ -186,7 +186,7 @@ must disable interrupts while the lock is held. If the device sends
a different interrupt, the driver will deadlock trying to recursively
acquire the spinlock. Such deadlocks can be avoided by using
spin_lock_irqsave() or spin_lock_irq() which disable local interrupts
and acquire the lock (see Documentation/DocBook/kernel-locking).
and acquire the lock (see Documentation/kernel-hacking/locking.rst).
4.5 How to tell whether MSI/MSI-X is enabled on a device
......
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- RCU CPU stall warnings (module parameter rcu_cpu_stall_suppress)
torture.txt
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arch/arm/boot/dts/r8a7778.dtsi
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arch/arm/boot/dts/r8a7779.dtsi
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arch/arm/boot/dts/r8a7790.dtsi
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arch/arm/boot/dts/r8a7791.dtsi
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arch/arm/boot/dts/r8a7793-gose.dts
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arch/arm/boot/dts/r8a7793.dtsi
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arch/arm/boot/dts/r8a7794.dtsi
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arch/arm/boot/dts/rk1108-evb.dts 已删除 100644 → 0
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arch/arm/boot/dts/rk1108.dtsi 已删除 100644 → 0
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arch/arm/boot/dts/rk3229-evb.dts
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arch/arm/boot/dts/rk322x.dtsi
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arch/arm/boot/dts/rk3288.dtsi
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arch/arm/boot/dts/rv1108-evb.dts 0 → 100644
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arch/arm/boot/dts/sama5d2.dtsi
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arch/arm/boot/dts/sama5d3.dtsi
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arch/arm/boot/dts/sama5d3xcm.dtsi
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arch/arm/boot/dts/sama5d4.dtsi
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arch/arm/boot/dts/sh73a0.dtsi
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arch/arm/boot/dts/socfpga.dtsi
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arch/arm/boot/dts/stm32f429.dtsi
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arch/arm/boot/dts/stm32f746.dtsi
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arch/arm/boot/dts/stm32h743.dtsi
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arch/arm/boot/dts/sun4i-a10.dtsi
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arch/arm/boot/dts/sun5i-a10s.dtsi
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arch/arm/boot/dts/sun5i-r8-chip.dts
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arch/arm/boot/dts/sun5i.dtsi
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arch/arm/boot/dts/sun6i-a31.dtsi
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arch/arm/boot/dts/sun7i-a20-m3.dts
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arch/arm/boot/dts/sun7i-a20.dtsi
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arch/arm/boot/dts/sun8i-a33.dtsi
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arch/arm/boot/dts/sun8i-a83t.dtsi
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arch/arm/boot/dts/sun8i-h3-nanopi-m1-plus.dts 0 → 100644
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arch/arm/boot/dts/sun8i-v3s-licheepi-zero-dock.dts 0 → 100644
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arch/arm/boot/dts/sun8i-v3s.dtsi
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arch/arm/boot/dts/sunxi-h3-h5.dtsi
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arch/arm/boot/dts/tegra124.dtsi
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arch/arm/boot/dts/tegra20-tec.dts
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arch/arm/boot/dts/tegra20-whistler.dts 已删除 100644 → 0
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arch/arm/boot/dts/tegra20.dtsi
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arch/arm/boot/dts/tegra30.dtsi
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arch/arm/boot/dts/tny_a9263.dts
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arch/arm/boot/dts/twl4030.dtsi
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arch/arm/boot/dts/uniphier-ld4.dtsi
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