26 Aug, 2019
1 commit
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The Thunderbolt controller is integrated into the Ice Lake CPU itself
and requires special flows to power it on and off using force power bit
in NHI VSEC registers. Runtime PM (RTD3) and Sx flows also differ from
the discrete solutions. Now the firmware notifies the driver whether
RTD3 entry or exit are possible. The driver is responsible of sending
Go2Sx command through link controller mailbox when system enters Sx
states (suspend-to-mem/disk). Rest of the ICM firwmare flows follow
Titan Ridge.Signed-off-by: Raanan Avargil
Signed-off-by: Mika Westerberg
Reviewed-by: Yehezkel Bernat
Tested-by: Mario Limonciello
03 Oct, 2018
1 commit
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Intel has done pretty major changes to the driver and we continue to do
so in the future as well. Add Intel as copyright holder of the files we
have done changes.While there drop "Cactus Ridge" from the headers because this driver
works also with other Thunderbolt controllers.No functional changes intended.
Signed-off-by: Mika Westerberg
Acked-by: Yehezkel Bernat
Signed-off-by: Greg Kroah-Hartman
04 Nov, 2017
1 commit
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Files removed in 'net-next' had their license header updated
in 'net'. We take the remove from 'net-next'.Signed-off-by: David S. Miller
02 Nov, 2017
1 commit
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Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
03 Oct, 2017
3 commits
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A Thunderbolt service driver might need to check if there was an error
with the descriptor when in frame mode. We also add two Rx specific
error flags RING_DESC_CRC_ERROR and RING_DESC_BUFFER_OVERRUN.Signed-off-by: Mika Westerberg
Reviewed-by: Michael Jamet
Reviewed-by: Yehezkel Bernat
Reviewed-by: Andy Shevchenko
Signed-off-by: David S. Miller -
When high-speed DMA paths are used to transfer arbitrary data over a
Thunderbolt link, DMA rings should be in frame mode instead of raw mode.
The latter is used by the control channel (ring 0). In frame mode each
data frame can hold up to 4kB payload.This patch modifies the DMA ring code to allow configuring a ring to be
in frame mode by passing a new flag (RING_FLAG_FRAME) to the ring when
it is allocated. In addition there might be need to enable end-to-end
(E2E) workaround for the ring to prevent losing Rx frames in certain
situations. We add another flag (RING_FLAG_E2E) that can be used for
this purpose.This code is based on the work done by Amir Levy and Michael Jamet.
Signed-off-by: Michael Jamet
Signed-off-by: Mika Westerberg
Reviewed-by: Yehezkel Bernat
Reviewed-by: Andy Shevchenko
Signed-off-by: David S. Miller -
This will keep the interrupt delivery rate reasonable. The value used
here (128 us) is a recommendation from the hardware people.This code is based on the work done by Amir Levy and Michael Jamet.
Signed-off-by: Michael Jamet
Signed-off-by: Mika Westerberg
Reviewed-by: Yehezkel Bernat
Reviewed-by: Andy Shevchenko
Signed-off-by: David S. Miller
09 Jun, 2017
3 commits
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Starting from Intel Falcon Ridge the internal connection manager running
on the Thunderbolt host controller has been supporting 4 security
levels. One reason for this is to prevent DMA attacks and only allow
connecting devices the user trusts.The internal connection manager (ICM) is the preferred way of connecting
Thunderbolt devices over software only implementation typically used on
Macs. The driver communicates with ICM using special Thunderbolt ring 0
(control channel) messages. In order to handle these messages we add
support for the ICM messages to the control channel.The security levels are as follows:
none - No security, all tunnels are created automatically
user - User needs to approve the device before tunnels are created
secure - User need to approve the device before tunnels are created.
The device is sent a challenge on future connects to be able
to verify it is actually the approved device.
dponly - Only Display Port and USB tunnels can be created and those
are created automatically.The security levels are typically configurable from the system BIOS and
by default it is set to "user" on many systems.In this patch each Thunderbolt device will have either one or two new
sysfs attributes: authorized and key. The latter appears for devices
that support secure connect.In order to identify the device the user can read identication
information, including UUID and name of the device from sysfs and based
on that make a decision to authorize the device. The device is
authorized by simply writing 1 to the "authorized" sysfs attribute. This
is following the USB bus device authorization mechanism. The secure
connect requires an additional challenge step (writing 2 to the
"authorized" attribute) in future connects when the key has already been
stored to the NVM of the device.Non-ICM systems (before Alpine Ridge) continue to use the existing
functionality and the security level is set to none. For systems with
Alpine Ridge, even on Apple hardware, we will use ICM.This code is based on the work done by Amir Levy and Michael Jamet.
Signed-off-by: Michael Jamet
Signed-off-by: Mika Westerberg
Reviewed-by: Yehezkel Bernat
Reviewed-by: Andy Shevchenko
Signed-off-by: Andreas Noever
Signed-off-by: Greg Kroah-Hartman -
The host controller includes two sets of registers that are used to
communicate with the firmware. Add functions that can be used to access
these registers.This code is based on the work done by Amir Levy and Michael Jamet.
Signed-off-by: Michael Jamet
Signed-off-by: Mika Westerberg
Reviewed-by: Yehezkel Bernat
Reviewed-by: Andy Shevchenko
Signed-off-by: Andreas Noever
Signed-off-by: Greg Kroah-Hartman -
Intel Thunderbolt controllers support up to 16 MSI-X vectors. Using
MSI-X is preferred over MSI or legacy interrupt and may bring additional
performance because there is no need to check the status registers which
interrupt was triggered.While there we convert comments in structs tb_ring and tb_nhi to follow
kernel-doc format more closely.This code is based on the work done by Amir Levy and Michael Jamet.
Signed-off-by: Michael Jamet
Signed-off-by: Mika Westerberg
Reviewed-by: Yehezkel Bernat
Reviewed-by: Andy Shevchenko
Signed-off-by: Andreas Noever
Signed-off-by: Greg Kroah-Hartman
09 Nov, 2016
1 commit
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This first patch updates the NHI Thunderbolt controller registers file to
reflect that it is not only for Cactus Ridge.
No functional change intended.Signed-off-by: Amir Levy
Signed-off-by: Andreas Noever
Signed-off-by: Greg Kroah-Hartman
20 Jun, 2014
1 commit
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Thunderbolt hotplug is supposed to be handled by the firmware. But Apple
decided to implement thunderbolt at the operating system level. The
firmare only initializes thunderbolt devices that are present at boot
time. This driver enables hotplug of thunderbolt of non-chained
thunderbolt devices on Apple systems with a cactus ridge controller.This first patch adds the Kconfig file as well the parts of the driver
which talk directly to the hardware (that is pci device setup, interrupt
handling and RX/TX ring management).Signed-off-by: Andreas Noever
Signed-off-by: Greg Kroah-Hartman
