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10 Commits

Author SHA1 Message Date
Kranthi Kuntala
dacb12877d thunderbolt: Add support for on-board retimers 
USB4 spec specifies standard access to retimers (both on-board and
cable) through USB4 port sideband access. This makes it possible to
upgrade their firmware in the same way than we already do with the
routers.

This enumerates on-board retimers under each USB4 port when the link
comes up and adds them to the bus under the router the retimer belongs
to. Retimers are exposed in sysfs with name like <device>:<port>.<index>
where device is the router the retimer belongs to, port is the USB4 port
the retimer is connected to and index is the retimer index under that
port (starting from 1). This applies to the upstream USB4 port as well
so if there is on-board retimer between the port and the router it is
also added accordingly.

At this time we do not add cable retimers but there is no techincal
restriction to do so in the future if needed. It is not clear whether it
makes sense to upgrade their firmwares and at least Thunderbolt 3 cables
it has not been done outside of lab environments.

The sysfs interface is made to follow the router NVM upgrade to make it
easy to extend the existing userspace (fwupd) to handle these as well.

Signed-off-by: Kranthi Kuntala <kranthi.kuntala@intel.com>
Co-developed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
 2020-06-22 19:58:32 +03:00
Mika Westerberg
ea81896dc9 thunderbolt: Update documentation with the USB4 information 
Update user's and administrator's guide to mention USB4, how it relates
to Thunderbolt and and how it is supported in Linux.

While there add the missing SPDX identifier to the document.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20191217123345.31850-10-mika.westerberg@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2019-12-18 15:41:41 +01:00
Mika Westerberg
dcc3c9e37f thunderbolt: Export IOMMU based DMA protection support to userspace 
Recent systems with Thunderbolt ports may support IOMMU natively. In
practice this means that Thunderbolt connected devices are placed behind
an IOMMU during the whole time it is connected (including during boot)
making Thunderbolt security levels redundant. This is called Kernel DMA
protection [1] by Microsoft.

Some of these systems still have Thunderbolt security level set to
"user" in order to support OS downgrade (the older version of the OS
might not support IOMMU based DMA protection so connecting a device
still relies on user approval).

Export this information to userspace by introducing a new sysfs
attribute (iommu_dma_protection). Based on it userspace tools can make
more accurate decision whether or not authorize the connected device.

In addition update Thunderbolt documentation regarding IOMMU based DMA
protection.

[1] https://docs.microsoft.com/en-us/windows/security/information-protection/kernel-dma-protection-for-thunderbolt

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <YehezkelShB@gmail.com>
 2018-12-05 12:01:56 +03:00
Mika Westerberg
6fc14e1a44 thunderbolt: Introduce USB only (SL4) security level 
This new security level works so that it creates one PCIe tunnel to the
connected Thunderbolt dock, removing PCIe links downstream of the dock.
This leaves only the internal USB controller visible.

Display Port tunnels are created normally.

While there make sure security sysfs attribute returns "unknown" for any
future security level.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
 2018-03-09 12:54:11 +03:00
Randy Dunlap
54e36a2dc5 Documentation/admin-guide: fixes for thunderbolt.rst 
Edits for grammar, punctuation, and a doubled-up word.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Yehezkel Bernat <yehezkel.bernat@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
 2018-02-01 12:50:01 -07:00
Andy Shevchenko
cce1fea50e thunderbolt: Make pathname to force_power shorter 
WMI is the bus inside kernel, so, we may access the GUID via
/sys/bus/wmi instead of doing this through /sys/devices path.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-12-16 16:37:51 +01:00
Linus Torvalds
07c455ee22 platform-drivers-x86 for v4.15-1 
For this cycle we have quite an update for the Dell SMBIOS driver
 including WMI work to provide an interface for SMBIOS tokens via sysfs
 and WMI support for 2017+ Dell laptop models. SMM dispatcher code is
 split into a separate driver followed by a new WMI dispatcher.
 The latter provides a character device interface to user space.
 
 The pull request contains a merge of immutable branch from Wolfram Sang
 in order to apply a dependent fix to the Intel CherryTrail Battery
 Management driver.
 
 Other Intel drivers got a lot of cleanups. The Turbo Boost Max 3.0
 support is added for Intel Skylake.
 
 Peaq WMI hotkeys driver gets its own maintainer and white list of
 supported models.
 
 Silead DMI is expanded to support few additional platforms.
 
 Tablet mode via GMMS ACPI method is added to support some ThinkPad
 tablets.
 
 Two commits appear here which were previously merged during the
 v4.14-rcX cycle:
 
 - d7ca5ebf24 platform/x86: intel_pmc_ipc: Use devm_* calls in driver probe function
 - e3075fd6f8 platform/x86: intel_pmc_ipc: Use spin_lock to protect GCR updates
 
 Add driver to force WMI Thunderbolt controller power status:
  - Add driver to force WMI Thunderbolt controller power status
 
 asus-wmi:
  -  Add lightbar led support
 
 dell-laptop:
  -  Allocate buffer before rfkill use
 
 dell-smbios:
  -  fix string overflow
  -  Add filtering support
  -  Introduce dispatcher for SMM calls
  -  Add a sysfs interface for SMBIOS tokens
  -  only run if proper oem string is detected
  -  Prefix class/select with cmd_
  -  Add pr_fmt definition to driver
 
 dell-smbios-smm:
  -  test for WSMT
 
 dell-smbios-wmi:
  -  release mutex lock on WMI call failure
  -  introduce userspace interface
  -  Add new WMI dispatcher driver
 
 dell-smo8800:
  -  remove redundant assignments to byte_data
 
 dell-wmi:
  -  don't check length returned
  -  clean up wmi descriptor check
  -  increase severity of some failures
  -  Do not match on descriptor GUID modalias
  -  Label driver as handling notifications
 
 dell-*wmi*:
  -  Relay failed initial probe to dependent drivers
 
 dell-wmi-descriptor:
  -  check if memory was allocated
  -  split WMI descriptor into it's own driver
 
 fujitsu-laptop:
  -  Fix radio LED detection
  -  Don't oops when FUJ02E3 is not presnt
 
 hp_accel:
  -  Add quirk for HP ProBook 440 G4
 
 hp-wmi:
  -  Fix tablet mode detection for convertibles
 
 ideapad-laptop:
  -  Add Lenovo Yoga 920-13IKB to no_hw_rfkill dmi list
 
 intel_cht_int33fe:
  -  Update fusb302 type string, add properties
  -  make a couple of local functions static
  -  Work around BIOS bug on some devices
 
 intel-hid:
  -  Power button suspend on Dell Latitude 7275
 
 intel_ips:
  -  Convert timers to use timer_setup()
  -  Remove FSF address from GPL notice
  -  Remove unneeded fields and label
  -  Keep pointer to struct device
  -  Use PCI_VDEVICE() macro
  -  Switch to new PCI IRQ allocation API
  -  Simplify error handling via devres API
 
 intel_pmc_ipc:
  -  Revert Use MFD framework to create dependent devices
  -  Use MFD framework to create dependent devices
  -  Use spin_lock to protect GCR updates
  -  Use devm_* calls in driver probe function
 
 intel_punit_ipc:
  -  Fix resource ioremap warning
 
 intel_telemetry:
  -  Remove useless default in Kconfig
  -  Add needed inclusion
  -  cleanup redundant headers
  -  Fix typos
  -  Fix load failure info
 
 intel_telemetry_debugfs:
  -  Use standard ARRAY_SIZE() macro
 
 intel_turbo_max_3:
  -  Add Skylake platform
 
 intel-wmi-thunderbolt:
  -  Silence error cases
 
 MAINTAINERS:
  -  Add entry for the PEAQ WMI hotkeys driver
 
 mlx-platform:
  -  make a couple of structures static
 
 peaq_wmi:
  -  Fix missing terminating entry for peaq_dmi_table
 
 peaq-wmi:
  -  Remove unnecessary checks from peaq_wmi_exit
  -  Add DMI check before binding to the WMI interface
  -  Revert Blacklist Lenovo ideapad 700-15ISK
  -  Blacklist Lenovo ideapad 700-15ISK
 
 silead_dmi:
  -  Add silead, home-button property to some tablets
  -  Add entry for the Digma e200 tablet
  -  Fix GP-electronic T701 entry
  -  Add entry for the Chuwi Hi8 Pro tablet
 
 sony-laptop:
  -  Drop variable assignment in sony_nc_setup_rfkill()
  -  Fix error handling in sony_nc_setup_rfkill()
 
 thinkpad_acpi:
  -  Implement tablet mode using GMMS method
 
 tools/wmi:
  -  add a sample for dell smbios communication over WMI
 
 wmi:
  -  release mutex on module acquistion failure
  -  create userspace interface for drivers
  -  Don't allow drivers to get each other's GUIDs
  -  Add new method wmidev_evaluate_method
  -  Destroy on cleanup rather than unregister
  -  Cleanup exit routine in reverse order of init
  -  Sort include list
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Merge tag 'platform-drivers-x86-v4.15-1' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver updates from Andy Shevchenko:
 "Here is the collected material against Platform Drivers x86 subsystem.
  It's rather bit busy cycle for PDx86, mostly due to Dell SMBIOS driver
  activity

  For this cycle we have quite an update for the Dell SMBIOS driver
  including WMI work to provide an interface for SMBIOS tokens via sysfs
  and WMI support for 2017+ Dell laptop models. SMM dispatcher code is
  split into a separate driver followed by a new WMI dispatcher. The
  latter provides a character device interface to user space.

  The git history also contains a merge of immutable branch from Wolfram
  Sang in order to apply a dependent fix to the Intel CherryTrail
  Battery Management driver.

  Other Intel drivers got a lot of cleanups. The Turbo Boost Max 3.0
  support is added for Intel Skylake.

  Peaq WMI hotkeys driver gets its own maintainer and white list of
  supported models.

  Silead DMI is expanded to support few additional platforms.

  Tablet mode via GMMS ACPI method is added to support some ThinkPad
  tablets.

  new driver:
   - Add driver to force WMI Thunderbolt controller power status

  asus-wmi:
   -  Add lightbar led support

  dell-laptop:
   -  Allocate buffer before rfkill use

  dell-smbios:
   -  fix string overflow
   -  Add filtering support
   -  Introduce dispatcher for SMM calls
   -  Add a sysfs interface for SMBIOS tokens
   -  only run if proper oem string is detected
   -  Prefix class/select with cmd_
   -  Add pr_fmt definition to driver

  dell-smbios-smm:
   -  test for WSMT

  dell-smbios-wmi:
   -  release mutex lock on WMI call failure
   -  introduce userspace interface
   -  Add new WMI dispatcher driver

  dell-smo8800:
   -  remove redundant assignments to byte_data

  dell-wmi:
   -  don't check length returned
   -  clean up wmi descriptor check
   -  increase severity of some failures
   -  Do not match on descriptor GUID modalias
   -  Label driver as handling notifications

  dell-*wmi*:
   -  Relay failed initial probe to dependent drivers

  dell-wmi-descriptor:
   -  check if memory was allocated
   -  split WMI descriptor into it's own driver

  fujitsu-laptop:
   -  Fix radio LED detection
   -  Don't oops when FUJ02E3 is not presnt

  hp_accel:
   -  Add quirk for HP ProBook 440 G4

  hp-wmi:
   -  Fix tablet mode detection for convertibles

  ideapad-laptop:
   -  Add Lenovo Yoga 920-13IKB to no_hw_rfkill dmi list

  intel_cht_int33fe:
   -  Update fusb302 type string, add properties
   -  make a couple of local functions static
   -  Work around BIOS bug on some devices

  intel-hid:
   -  Power button suspend on Dell Latitude 7275

  intel_ips:
   -  Convert timers to use timer_setup()
   -  Remove FSF address from GPL notice
   -  Remove unneeded fields and label
   -  Keep pointer to struct device
   -  Use PCI_VDEVICE() macro
   -  Switch to new PCI IRQ allocation API
   -  Simplify error handling via devres API

  intel_pmc_ipc:
   -  Revert Use MFD framework to create dependent devices
   -  Use MFD framework to create dependent devices
   -  Use spin_lock to protect GCR updates
   -  Use devm_* calls in driver probe function

  intel_punit_ipc:
   -  Fix resource ioremap warning

  intel_telemetry:
   -  Remove useless default in Kconfig
   -  Add needed inclusion
   -  cleanup redundant headers
   -  Fix typos
   -  Fix load failure info

  intel_telemetry_debugfs:
   -  Use standard ARRAY_SIZE() macro

  intel_turbo_max_3:
   -  Add Skylake platform

  intel-wmi-thunderbolt:
   -  Silence error cases

  mlx-platform:
   -  make a couple of structures static

  peaq_wmi:
   -  Fix missing terminating entry for peaq_dmi_table

  peaq-wmi:
   -  Remove unnecessary checks from peaq_wmi_exit
   -  Add DMI check before binding to the WMI interface
   -  Revert Blacklist Lenovo ideapad 700-15ISK
   -  Blacklist Lenovo ideapad 700-15ISK

  silead_dmi:
   -  Add silead, home-button property to some tablets
   -  Add entry for the Digma e200 tablet
   -  Fix GP-electronic T701 entry
   -  Add entry for the Chuwi Hi8 Pro tablet

  sony-laptop:
   -  Drop variable assignment in sony_nc_setup_rfkill()
   -  Fix error handling in sony_nc_setup_rfkill()

  thinkpad_acpi:
   -  Implement tablet mode using GMMS method

  tools/wmi:
   -  add a sample for dell smbios communication over WMI

  wmi:
   -  release mutex on module acquistion failure
   -  create userspace interface for drivers
   -  Don't allow drivers to get each other's GUIDs
   -  Add new method wmidev_evaluate_method
   -  Destroy on cleanup rather than unregister
   -  Cleanup exit routine in reverse order of init
   -  Sort include list"

* tag 'platform-drivers-x86-v4.15-1' of git://git.infradead.org/linux-platform-drivers-x86: (74 commits)
  platform/x86: silead_dmi: Add silead, home-button property to some tablets
  platform/x86: dell-laptop: Allocate buffer before rfkill use
  platform/x86: dell-*wmi*: Relay failed initial probe to dependent drivers
  platform/x86: dell-wmi-descriptor: check if memory was allocated
  platform/x86: Revert intel_pmc_ipc: Use MFD framework to create dependent devices
  platform/x86: dell-smbios-wmi: release mutex lock on WMI call failure
  platform/x86: wmi: release mutex on module acquistion failure
  platform/x86: dell-smbios: fix string overflow
  platform/x86: intel_pmc_ipc: Use MFD framework to create dependent devices
  platform/x86: intel_punit_ipc: Fix resource ioremap warning
  platform/x86: dell-smo8800: remove redundant assignments to byte_data
  platform/x86: hp-wmi: Fix tablet mode detection for convertibles
  platform/x86: intel_ips: Convert timers to use timer_setup()
  platform/x86: sony-laptop: Drop variable assignment in sony_nc_setup_rfkill()
  platform/x86: sony-laptop: Fix error handling in sony_nc_setup_rfkill()
  tools/wmi: add a sample for dell smbios communication over WMI
  platform/x86: dell-smbios-wmi: introduce userspace interface
  platform/x86: wmi: create userspace interface for drivers
  platform/x86: dell-smbios: Add filtering support
  platform/x86: dell-smbios-smm: test for WSMT
  ...
 2017-11-18 10:26:57 -08:00
Amir Levy
e69b6c02b4 net: Add support for networking over Thunderbolt cable 
ThunderboltIP is a protocol created by Apple to tunnel IP/ethernet
traffic over a Thunderbolt cable. The protocol consists of configuration
phase where each side sends ThunderboltIP login packets (the protocol is
determined by UUID in the XDomain packet header) over the configuration
channel. Once both sides get positive acknowledgment to their login
packet, they configure high-speed DMA path accordingly. This DMA path is
then used to transmit and receive networking traffic.

This patch creates a virtual ethernet interface the host software can
use in the same way as any other networking interface. Once the
interface is brought up successfully network packets get tunneled over
the Thunderbolt cable to the remote host and back.

The connection is terminated by sending a ThunderboltIP logout packet
over the configuration channel. We do this when the network interface is
brought down by user or the driver is unloaded.

Signed-off-by: Amir Levy <amir.jer.levy@intel.com>
Signed-off-by: Michael Jamet <michael.jamet@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 2017-10-02 11:24:42 -07:00
Mario Limonciello
ce6a90027c platform/x86: Add driver to force WMI Thunderbolt controller power status 
Current implementations of Intel Thunderbolt controllers will go
into a low power mode when not in use.

Many machines containing these controllers also have a GPIO wired up
that can force the controller awake.  This is offered via a ACPI-WMI
interface intended to be manipulated by a userspace utility.

This mechanism is provided by Intel to OEMs to include in BIOS.
It uses an industry wide GUID that is populated in a separate _WDG
entry with no binary MOF.

This interface allows software such as fwupd to wake up thunderbolt
controllers to query the firmware version or flash new firmware.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
[andy fixed merge conflicts and bump kernel version for ABI]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 2017-09-20 16:07:22 +03:00
Mika Westerberg
163f151152 thunderbolt: Add documentation how Thunderbolt bus can be used 
Since there are no such tool yet that handles all the low-level details
of connecting devices and upgrading their firmware, add a small document
that shows how the Thunderbolt bus can be used directly from command
line.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Michael Jamet <michael.jamet@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-06-09 11:42:43 +02:00