linux.git/drivers/thunderbolt/Kconfig, branch v6.0

kunit: fix Kconfig for build-in tests USB4 and Nitro Enclaves

2022-09-01T19:00:48+00:00

Both the USB4 and Nitro Enclaves KUNIT tests are now able to be compiled
if KUNIT is compiled as a module. This leads to issues if KUNIT is being
packaged separately from the core kernel and when KUNIT is run baremetal
without the required driver compiled into the kernel.

Fixes: 635dcd16844b ("thunderbolt: test: Use kunit_test_suite() macro")
Fixes: fe5be808fa6c ("nitro_enclaves: test: Use kunit_test_suite() macro")
Signed-off-by: Nico Pache 
Reviewed-by: David Gow 
Reviewed-by: Andra Paraschiv 
Acked-by: Brendan Higgins 
Signed-off-by: Shuah Khan

thunderbolt: test: Use kunit_test_suite() macro

2022-07-11T23:13:21+00:00

The new implementation of kunit_test_suite() for modules no longer
conflicts with module_init, so can now be used by the thunderbolt tests.

Also update the Kconfig entry to enable the test when KUNIT_ALL_TESTS is
enabled.

This means that kunit_tool can now successfully run and parse the test
results with, for example:
	./tools/testing/kunit/kunit.py run --arch=x86_64 \
	--kconfig_add CONFIG_PCI=y --kconfig_add CONFIG_USB4=y \
	'thunderbolt'

Acked-by: Mika Westerberg 
Acked-by: Daniel Latypov 
Acked-by: Brendan Higgins 
Signed-off-by: David Gow 
Signed-off-by: Shuah Khan

thunderbolt: Add DMA traffic test driver

2020-11-11T07:20:16+00:00

This driver allows sending DMA traffic over XDomain connection.
Specifically over a loopback connection using either a Thunderbolt/USB4
cable that is connected back to the host router port, or a special
loopback dongle that has RX and TX lines crossed. This can be useful at
manufacturing floor to check whether Thunderbolt/USB4 ports are
functional.

The driver exposes debugfs directory under the XDomain service that can
be used to configure the driver, start the test and check the results.

If a loopback dongle is used the steps to send and receive 1000 packets
can be done like:

  # modprobe thunderbolt_dma_test
  # echo 1000 > /sys/kernel/debug/thunderbolt//dma_test/packets_to_receive
  # echo 1000 > /sys/kernel/debug/thunderbolt//dma_test/packets_to_send
  # echo 1 > /sys/kernel/debug/thunderbolt//dma_test/test
  # cat /sys/kernel/debug/thunderbolt//dma_test/status

When a cable is connected back to host then there are two Thunderbolt
services, one is configured for receiving (does not matter which one):

  # modprobe thunderbolt_dma_test
  # echo 1000 > /sys/kernel/debug/thunderbolt//dma_test/packets_to_receive
  # echo 1 > /sys/kernel/debug/thunderbolt//dma_test/test

The other one for sending:

  # echo 1000 > /sys/kernel/debug/thunderbolt//dma_test/packets_to_send
  # echo 1 > /sys/kernel/debug/thunderbolt//dma_test/test

Results can be read from both services status attributes.

Signed-off-by: Isaac Hazan 
Signed-off-by: Mika Westerberg 
Acked-by: Yehezkel Bernat 
Reviewed-by: Greg Kroah-Hartman

thunderbolt: Use "if USB4" instead of "depends on" in Kconfig

2020-09-16T11:57:46+00:00

This groups the USB4 options more nicely, and also does not require that
every config option lists explicit depends on USB4.

Signed-off-by: Mika Westerberg

thunderbolt: Allow KUnit tests to be built also when CONFIG_USB4=m

2020-09-16T11:57:46+00:00

This adds a bit more build coverage for the tests even though these are
not expected to be enabled by normal users and distros. In order to make
this working we need to open-code kunit_test_suite() and call the
relevant functions directly in the driver init/exit hook.

Signed-off-by: Mika Westerberg

thunderbolt: Add debugfs interface

2020-09-03T09:21:08+00:00

This adds debugfs interface that can be used for debugging possible
issues in hardware/software. It exposes router and adapter config spaces
through files like this:

  /sys/kernel/debug/thunderbolt//regs
  /sys/kernel/debug/thunderbolt///regs
  /sys/kernel/debug/thunderbolt///path
  /sys/kernel/debug/thunderbolt///counters
  /sys/kernel/debug/thunderbolt///regs
  /sys/kernel/debug/thunderbolt///path
  /sys/kernel/debug/thunderbolt///counters
  ...

The "regs" is either the router or port configuration space register
dump. The "path" is the port path configuration space and "counters" is
the optional counters configuration space.

These files contains one register per line so it should be easy to use
normal filtering tools to find the registers of interest if needed.

The router and adapter regs file becomes writable when
CONFIG_USB4_DEBUGFS_WRITE is enabled (which is not supposed to be done
in production systems) and in this case the developer can write "offset
value" lines there to modify the hardware directly. For convenience this
also supports the long format the read side produces (but ignores the
additional fields). The counters file can be written even when
CONFIG_USB4_DEBUGFS_WRITE is not enabled and it is only used to clear
the counter values.

Signed-off-by: Gil Fine 
Signed-off-by: Mika Westerberg 
Reviewed-by: Greg Kroah-Hartman

thunderbolt: Add KUnit tests for path walking

2020-06-22T16:58:20+00:00

This adds KUnit tests for path walking which is only dependent on
software structures, so no hardware is needed to run these.

We make these available only when both KUnit and the driver itself are
built into the kernel image. The reason for this is that KUnit adds its
own module_init() call in kunit_test_suite() which generates linker
error because the driver does the same in nhi.c. This should be fine for
now because these tests are only meant to run by developers anyway.

Signed-off-by: Mika Westerberg

thunderbolt: Improve USB4 config symbol help text

2020-06-15T11:34:21+00:00

Fix the spelling of "specification", and add a missing "the" article.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Mika Westerberg

thunderbolt: Update Kconfig to allow building on other architectures.

2020-05-13T16:32:48+00:00

Thunderbolt 3 and USB4 shouldn't be x86 only.

Tested on a SolidRun HoneyComb (ARM Cortex-A72) with a
Gigabyte Titan Ridge Thunderbolt 3 PCIe card (JHL7540).

Signed-off-by: David Manouchehri 
Signed-off-by: Mika Westerberg

thunderbolt: Update Kconfig entries to USB4

2019-12-18T14:39:18+00:00

Since the driver now supports USB4 which is the standard going forward,
update the Kconfig entry to mention this and rename the entry from
CONFIG_THUNDERBOLT to CONFIG_USB4 instead to help people to find the
correct option if they want to enable USB4.

Also do the same for Thunderbolt network driver.

Signed-off-by: Mika Westerberg 
Cc: David S. Miller 
Link: https://lore.kernel.org/r/20191217123345.31850-6-mika.westerberg@linux.intel.com
Signed-off-by: Greg Kroah-Hartman