Merge branch 'trace-points-for-mv88e6xxx'

Merge branch 'trace-points-for-mv88e6xxx'

Vladimir Oltean says:

====================
Trace points for mv88e6xxx

While testing Hans Schultz' attempt at offloading MAB on mv88e6xxx:
https://patchwork.kernel.org/project/netdevbpf/cover/20221205185908.217520-1-netdev@kapio-technology.com/
I noticed that he still didn't get rid of the huge log spam caused by
ATU and VTU violations, even if we discussed about this:
https://patchwork.kernel.org/project/netdevbpf/cover/20221112203748.68995-1-netdev@kapio-technology.com/#25091076

It seems unlikely he's going to ever do this, so here is my own stab at
converting those messages to trace points. This is IMO an improvement
regardless of whether Hans' work with MAB lands or not, especially the
VTU violations which were quite annoying to me as well.

A small sample of before:

$ ./bridge_locked_port.sh lan1 lan2 lan3 lan4
[  114.465272] mv88e6085 d0032004.mdio-mii:10: VTU member violation for vid 100, source port 9
[  119.550508] mv88e6xxx_g1_vtu_prob_irq_thread_fn: 34 callbacks suppressed
[  120.369586] mv88e6085 d0032004.mdio-mii:10: VTU member violation for vid 100, source port 9
[  120.473658] mv88e6085 d0032004.mdio-mii:10: VTU member violation for vid 100, source port 9
[  125.535209] mv88e6xxx_g1_vtu_prob_irq_thread_fn: 21 callbacks suppressed
[  125.535243] mv88e6085 d0032004.mdio-mii:10: VTU member violation for vid 100, source port 9
[  126.174558] mv88e6085 d0032004.mdio-mii:10: VTU member violation for vid 100, source port 9
[  130.234055] mv88e6085 d0032004.mdio-mii:10: ATU miss violation for 00:01:02:03:04:01 fid 3 portvec 4 spid 2
[  130.338193] mv88e6085 d0032004.mdio-mii:10: ATU miss violation for 00:01:02:03:04:01 fid 3 portvec 4 spid 2
[  134.626099] mv88e6xxx_g1_atu_prob_irq_thread_fn: 38 callbacks suppressed
[  134.626132] mv88e6085 d0032004.mdio-mii:10: ATU miss violation for 00:01:02:03:04:01 fid 3 portvec 4 spid 2

and after:

$ trace-cmd record -e mv88e6xxx ./bridge_locked_port.sh lan1 lan2 lan3 lan4
$ trace-cmd report
   irq/35-moxtet-60    [001]    93.929734: mv88e6xxx_vtu_miss_violation: dev d0032004.mdio-mii:10 spid 9 vid 100
   irq/35-moxtet-60    [001]    94.183209: mv88e6xxx_vtu_miss_violation: dev d0032004.mdio-mii:10 spid 9 vid 100
   irq/35-moxtet-60    [001]   101.865545: mv88e6xxx_vtu_miss_violation: dev d0032004.mdio-mii:10 spid 9 vid 100
   irq/35-moxtet-60    [001]   121.831261: mv88e6xxx_vtu_member_violation: dev d0032004.mdio-mii:10 spid 9 vid 100
   irq/35-moxtet-60    [001]   122.371238: mv88e6xxx_vtu_member_violation: dev d0032004.mdio-mii:10 spid 9 vid 100
   irq/35-moxtet-60    [001]   148.452932: mv88e6xxx_atu_miss_violation: dev d0032004.mdio-mii:10 spid 2 portvec 0x4 addr 00:01:02:03:04:01 fid 0

v1 at:
https://patchwork.kernel.org/project/netdevbpf/cover/20221207233954.3619276-1-vladimir.oltean@nxp.com/
====================

Link: https://lore.kernel.org/r/20221209172817.371434-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>