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185646a8a0
Add tests to check that the napi retained the IRQ after down/up,
multiple changes in the number of rx queues and after
attaching/releasing XDP program.
Tested on ice and idpf:
# NETIF=<iface> tools/testing/selftests/drivers/net/hw/irq.py
KTAP version 1
1..4
ok 1 irq.check_irqs_reported
ok 2 irq.check_reconfig_queues
ok 3 irq.check_reconfig_xdp
ok 4 irq.check_down
# Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0
Tested-by: Ahmed Zaki <ahmed.zaki@intel.com>
Link: https://patch.msgid.link/20250224232228.990783-7-ahmed.zaki@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
100 lines
2.8 KiB
Python
Executable File
100 lines
2.8 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0
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from lib.py import ksft_run, ksft_exit
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from lib.py import ksft_ge, ksft_eq
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from lib.py import KsftSkipEx
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from lib.py import ksft_disruptive
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from lib.py import EthtoolFamily, NetdevFamily
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from lib.py import NetDrvEnv
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from lib.py import cmd, ip, defer
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def read_affinity(irq) -> str:
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with open(f'/proc/irq/{irq}/smp_affinity', 'r') as fp:
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return fp.read().lstrip("0,").strip()
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def write_affinity(irq, what) -> str:
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if what != read_affinity(irq):
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with open(f'/proc/irq/{irq}/smp_affinity', 'w') as fp:
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fp.write(what)
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def check_irqs_reported(cfg) -> None:
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""" Check that device reports IRQs for NAPI instances """
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napis = cfg.netnl.napi_get({"ifindex": cfg.ifindex}, dump=True)
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irqs = sum(['irq' in x for x in napis])
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ksft_ge(irqs, 1)
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ksft_eq(irqs, len(napis))
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def _check_reconfig(cfg, reconfig_cb) -> None:
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napis = cfg.netnl.napi_get({"ifindex": cfg.ifindex}, dump=True)
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for n in reversed(napis):
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if 'irq' in n:
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break
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else:
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raise KsftSkipEx(f"Device has no NAPI with IRQ attribute (#napis: {len(napis)}")
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old = read_affinity(n['irq'])
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# pick an affinity that's not the current one
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new = "3" if old != "3" else "5"
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write_affinity(n['irq'], new)
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defer(write_affinity, n['irq'], old)
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reconfig_cb(cfg)
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ksft_eq(read_affinity(n['irq']), new, comment="IRQ affinity changed after reconfig")
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def check_reconfig_queues(cfg) -> None:
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def reconfig(cfg) -> None:
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channels = cfg.ethnl.channels_get({'header': {'dev-index': cfg.ifindex}})
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if channels['combined-count'] == 0:
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rx_type = 'rx'
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else:
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rx_type = 'combined'
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cur_queue_cnt = channels[f'{rx_type}-count']
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max_queue_cnt = channels[f'{rx_type}-max']
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cmd(f"ethtool -L {cfg.ifname} {rx_type} 1")
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cmd(f"ethtool -L {cfg.ifname} {rx_type} {max_queue_cnt}")
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cmd(f"ethtool -L {cfg.ifname} {rx_type} {cur_queue_cnt}")
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_check_reconfig(cfg, reconfig)
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def check_reconfig_xdp(cfg) -> None:
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def reconfig(cfg) -> None:
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ip(f"link set dev %s xdp obj %s sec xdp" %
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(cfg.ifname, cfg.rpath("xdp_dummy.bpf.o")))
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ip(f"link set dev %s xdp off" % cfg.ifname)
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_check_reconfig(cfg, reconfig)
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@ksft_disruptive
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def check_down(cfg) -> None:
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def reconfig(cfg) -> None:
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ip("link set dev %s down" % cfg.ifname)
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ip("link set dev %s up" % cfg.ifname)
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_check_reconfig(cfg, reconfig)
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def main() -> None:
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with NetDrvEnv(__file__, nsim_test=False) as cfg:
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cfg.ethnl = EthtoolFamily()
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cfg.netnl = NetdevFamily()
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ksft_run([check_irqs_reported, check_reconfig_queues,
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check_reconfig_xdp, check_down],
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args=(cfg, ))
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ksft_exit()
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if __name__ == "__main__":
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main()
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