[PATCH net-next v3 0/4] selftests: drv-net: rss_ctx: add tests for RSS contexts

[Jakub Kicinski <kuba@kernel.org>]

Add a few tests exercising RSS context API.
In addition to basic sanity checks, tests add RSS contexts,
n-tuple rule to direct traffic to them (based on dst port),
and qstats to make sure traffic landed where we expected.

v2 adds a test for removing contexts out of order. When testing
bnxt - either the new test or running more tests after the overlap
test makes the device act strangely. To the point where it may start
giving out ntuple IDs of 0 for all rules..

Ed, could you try the tests with your device?

  $ export NETIF=eth0 REMOTE_...
  $ ./drivers/net/hw/rss_ctx.py
  KTAP version 1
  1..8
  ok 1 rss_ctx.test_rss_key_indir
  ok 2 rss_ctx.test_rss_context
  ok 3 rss_ctx.test_rss_context4
  # Increasing queue count 44 -> 66
  # Failed to create context 32, trying to test what we got
  ok 4 rss_ctx.test_rss_context32 # SKIP Tested only 31 contexts, wanted 32
  ok 5 rss_ctx.test_rss_context_overlap
  ok 6 rss_ctx.test_rss_context_overlap2
  # .. sprays traffic like a headless chicken ..
  not ok 7 rss_ctx.test_rss_context_out_of_order
  ok 8 rss_ctx.test_rss_context4_create_with_cfg
  # Totals: pass:6 fail:1 xfail:0 xpass:0 skip:1 error:0

v2: https://lore.kernel.org/all/20240625010210.2002310-1-kuba@kernel.org
v1: https://lore.kernel.org/all/20240620232902.1343834-1-kuba@kernel.org

Jakub Kicinski (4):
  selftests: drv-net: try to check if port is in use
  selftests: drv-net: add helper to wait for HW stats to sync
  selftests: drv-net: add ability to wait for at least N packets to load
    gen
  selftests: drv-net: rss_ctx: add tests for RSS configuration and
    contexts

 .../testing/selftests/drivers/net/hw/Makefile |   1 +
 .../selftests/drivers/net/hw/rss_ctx.py       | 383 ++++++++++++++++++
 .../selftests/drivers/net/lib/py/env.py       |  19 +-
 .../selftests/drivers/net/lib/py/load.py      |  37 +-
 tools/testing/selftests/net/lib/py/ksft.py    |   5 +
 tools/testing/selftests/net/lib/py/utils.py   |  27 +-
 6 files changed, 457 insertions(+), 15 deletions(-)
 create mode 100755 tools/testing/selftests/drivers/net/hw/rss_ctx.py

-- 
2.45.2