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For USB4 v2 routers, the PCIe adapter capability length is longer.
Display the correct capability length in the debugfs register dump.
Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
For USB4 v2 routers, the DisplayPort IN adapter capability length is
longer. Display the correct capability length in the debugfs register
dump.
Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
For USB4 v2 routers, the adapters's TMU capability has two additional
double words. Include them in the debugfs register dump.
Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
USB4 v2 spec introduces modified encapsulation of PCIe TLP and DLLP
packets. This improves the PCIe tunneled traffic usage by reducing
overhead. Enable this if both sides of the link support it.
Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Program the CMUV (Connection Manager USB4 Version) field for USB4 v2 and
v1 routers according to the spec.
Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
USB4 v2 added a bit that can be used to reset the host router so we use
this to trigger reset when the driver probes. This will reset the
already connected topology as well but doing this simplifies things a
lot if for instance the link is already set to asymmetric. We also add
a module parameter to prevent this in case of problems.
While there rename the REG_HOP_COUNT to REG_CAPS to match the USB4 spec
naming better.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
USB4 v2 spec adds a bunch of new notifications that the connection
manager can use instead of polling. While we do not use these yet we
need to ack the ones routers expect to be acked.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
USB4 v2 bumps the per-lane speed up to 40 Gb/s. Also the lanes are
always bonded which gives 80 Gb/s symmetric link (and 120/40 Gb/s
asymmetric). This updates the speed and width of routers and XDomain
connections to support the Gen 4 link. For now we keep the link as is
even if it is already asymmetric.
While there make tb_port_set_link_width() static.
Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Add a new function usb4_switch_version() that can be used to figure out
the spec version of the router and make tb_switch_is_usb4() to use it as
well. Update the uevent accordingly.
Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
It is not required to be implemented at all because USB4 does not use
lane 1 for tunneling except when aggregated with lane 0. For this reason
do not try to read the path config space of USB4 lane 1 adapters.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This is also something not always updated after the DROM contents itself
so issue warning but continue parsing it as we do for pre-USB4 DROMs
too.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
When USB4 port is in offline mode (this mean there is no device
attached) we want to keep the sideband up to make it possible to
communicate with the retimers. In the same way there is no need to
enable sideband transactions when the USB4 port is not offline as they
are already up.
For this reason make the enabling/disabling depend on the USB4 port
offline status.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Once retimer NVM authentication is started, sending UNSET_INBOUND_SBTX
will fail so avoid doing that. Only send it when we are writing an image
with not authentication or when the authentication failed early.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
According to the USB4 retimer guide the correct order is immediately
after sending ENUMERATE_RETIMERS so update the code to follow this.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tunnels between hosts should not have CL states enabled because
otherwise they might enter a low power state without the other end
noticing which causes packets to be lost. For this reason disable all
CL states upon first DMA tunnel creation. Once the last DMA tunnel is
torn down we try to re-enable them.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This allows us to disable all CL states temporarily when running lane
margining and then return back the previously enabled states.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
In case the boot firmware enabled any of them, read the currently
configured CL states and update the router structure accordingly.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This makes it easier to spot from the logs and follows what we do with
the TMU code already. We also log enabling/disabling CL states using the
tb_sw_dbg() instead of tb_port_dbg().
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
There is really no need to call any of the CLx functions in the TMU code
so remove all these checks. This makes the TMU enable/disable flows
easier to follow as well.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Currently tb_switch_clx_enable() enables CL states only for the first
depth router. This is something we may want to change in the future and
in addition it is not visible from the calling path at all. For this
reason do the check in the tb.c so it is immediately visible that we
only do this for the first depth router. Fix the kernel-docs
accordingly.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This is more natural and follows the hardware register layout better.
This makes it easier to see which CL states we enable (even though they
should be enabled together). Rename 'clx_mask' to 'clx' everywhere as
this is now always bitmask.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This avoids some duplication and makes the flow slightly easier to
understand. Also follows what we do in tb_enable_tmu().
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
No need to have separate functions for these so fold them into
tb_switch_clx_enable() and tb_switch_clx_disable() accordingly.
No functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
There really don't belong to switch.c so move them into their own file.
As we do this rename the functions to match the conventions used
elsewhere in the driver.
No functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
There is no need to duplicate the code the enables TMU. Also update the
comment to better explain why we do this in the first place.
No functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This is better to be part of the software connection manager flows in
tb.c. Also name the new function tb_increase_tmu_accuracy() to match
what it actually does.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Now this is split into two with one having a misleading name
(tb_switch_tmu_unidirectional_enable()).
Make this easier to read, rename and consolidate the two functions into
one with name that explains what it actually does. Use the two constants
as well that were added but never used to make it clear which bits are
being set.
No functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
There is no point passing it as we already have a field for that. While
there clean up the kernel-doc of things that do not really belong to the
API documentation (these can be figured out from the spec itself).
No functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Drop extra empty line and get rid of the '__' in function names. No
functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
In the same way we did for the routers add a function that returns the
parent routers downstream facing port for XDomain devices.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Introduce tb_switch_downstream_port() helper function that returns the
downstream port of a parent switch that is connected to the upstream
port of specified switch. From now on, we use it all across the driver
where applicable.
While there fix a whitespace in comment and rename 'downstream' to
'down' to be consistent with the rest of the driver.
Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
When resuming from system sleep states the driver issues following
warning on Intel hardware:
thunderbolt 0000:07:00.0: interrupt for TX ring 0 is already enabled
The reason for this is that the commit in question did not mask the ring
interrupt on Intel hardware leaving the interrupt active. Fix this by
masking it also in Intel hardware.
Reported-by: beld zhang <beldzhang@gmail.com>
Tested-by: beld zhang <beldzhang@gmail.com>
Closes: https://lore.kernel.org/linux-usb/ZHKW5NeabmfhgLbY@debian.me/
Fixes: c4af8e3fecd0 ("thunderbolt: Clear registers properly when auto clear isn't in use")
Cc: stable@vger.kernel.org
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
If the boot firmware has already established tunnels, especially ones
that have special requirements from the link such as DisplayPort, we
should not blindly enable CL states (nor change the TMU configuration).
Otherwise the existing tunnels may not work as expected.
For this reason, skip the CL state enabling when we go over the existing
topology. This will also keep the TMU settings untouched because we do
not change the TMU configuration when CL states are not enabled.
Reported-by: Koba Ko <koba.ko@canonical.com>
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/7831
Cc: stable@vger.kernel.org # v6.0+
Acked-By: Yehezkel Bernat <YehezkelShB@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
It turns out that when plugging in VGA cable through USB-C to VGA/DVI
dongle the Connection Manager handshake can take longer time, at least
on Intel Titan Ridge based docks such as Dell WD91TB. This leads to
following error in the dmesg:
thunderbolt 0000:00:0d.3: 3:10: DP tunnel activation failed, aborting
and the display stays blank (because we failed to establish the tunnel).
For this reason increase the timeout to 3s.
Reported-by: Koba Ko <koba.ko@canonical.com>
Cc: stable@vger.kernel.org
Acked-By: Yehezkel Bernat <YehezkelShB@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Make the description match the core driver and the networking with
Thunderbolt/USB4 prefix. No functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
The default ones should be find but this allows the user to tweak the
credits to get more performance out of the P2P connection.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Add a debug log to this quirk as well so we can see what quirks have
been applied when debugging.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Ring 0 cannot be used for anything else than control channel messages.
For this reason add a check to tb_tunnel_alloc_dma() and fail if someone
tries to do that.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Both tb_xdomain_enable_paths() and tb_xdomain_disable_paths() expect -1,
not 0, if the corresponding ring is not needed. For this reason change
the driver to use correct value for the rings that are not needed.
Fixes: 180b0689425c ("thunderbolt: Allow multiple DMA tunnels over a single XDomain connection")
Cc: stable@vger.kernel.org
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
When `QUIRK_AUTO_CLEAR_INT` isn't set, interrupt masking should be
cleared by writing to Interrupt Mask Clear (IMR) and interrupt
status should be cleared properly at shutdown/init.
This fixes an error where interrupts are left enabled during resume
from hibernation with `CONFIG_USB4=y`.
Fixes: 468c49f44759 ("thunderbolt: Disable interrupt auto clear for rings")
Cc: stable@vger.kernel.org # v6.3
Reported-by: Takashi Iwai <tiwai@suse.de>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217343
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This includes following Thunderbolt/USB4 changes for the v6.4 merge
window:
- Refactoring of DROM read code paths
- Convert to use SI units from units.h
- A couple of cleanups
All these have been in linux-next with no reported issues.
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Merge tag 'thunderbolt-for-v6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next
Mika writes:
thunderbolt: Changes for v6.4 merge window
This includes following Thunderbolt/USB4 changes for the v6.4 merge
window:
- Refactoring of DROM read code paths
- Convert to use SI units from units.h
- A couple of cleanups
All these have been in linux-next with no reported issues.
* tag 'thunderbolt-for-v6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt:
thunderbolt: Introduce usb4_port_sb_opcode_err_to_errno() helper
thunderbolt: Make use of SI units from units.h
thunderbolt: Get rid of redundant 'else'
thunderbolt: Refactor DROM reading
thunderbolt: use `tb_eeprom_get_drom_offset` to discover DROM offset
The usb4_port_sb_opcode_err_to_errno() converts from USB4 error codes
to the Linux errno space. In particular, this makes the intention
of the repeating usb4_port_retimer_read() call in the
usb4_port_retimer_nvm_authenticate_status() clearer.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
