https://github.com/torvalds/linux
Revision 52849bcf0029ccc553be304e4f804938a39112e2 authored by Vladimir Oltean on 12 October 2021, 11:40:36 UTC, committed by Jakub Kicinski on 13 October 2021, 00:35:17 UTC
PTP packets with 2-step TX timestamp requests are matched to packets based on the egress port number and a 6-bit timestamp identifier. All PTP timestamps are held in a common FIFO that is 128 entry deep. This patch ensures that back-to-back timestamping requests cannot exceed the hardware FIFO capacity. If that happens, simply send the packets without requesting a TX timestamp to be taken (in the case of felix, since the DSA API has a void return code in ds->ops->port_txtstamp) or drop them (in the case of ocelot). I've moved the ts_id_lock from a per-port basis to a per-switch basis, because we need separate accounting for both numbers of PTP frames in flight. And since we need locking to inc/dec the per-switch counter, that also offers protection for the per-port counter and hence there is no reason to have a per-port counter anymore. Fixes: 4e3b0468e6d7 ("net: mscc: PTP Hardware Clock (PHC) support") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Tip revision: 52849bcf0029ccc553be304e4f804938a39112e2 authored by Vladimir Oltean on 12 October 2021, 11:40:36 UTC
net: mscc: ocelot: avoid overflowing the PTP timestamp FIFO
net: mscc: ocelot: avoid overflowing the PTP timestamp FIFO
Tip revision: 52849bc
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.cocciconfig | -rw-r--r-- | 59 bytes |
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.gitignore | -rw-r--r-- | 1.9 KB |
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COPYING | -rw-r--r-- | 496 bytes |
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Makefile | -rw-r--r-- | 64.0 KB |
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