Michael Walle 297c4de6f7 net: dsa: felix: re-enable TAS guard band mode ... Commit 316bcffe44 ("net: dsa: felix: disable always guard band bit for TAS config") disabled the guard band and broke 802.3Qbv compliance. There are two issues here: (1) Without the guard band the end of the scheduling window could be overrun by a frame in transit. (2) Frames that don't fit into a configured window will still be sent. The reason for both issues is that the switch will schedule the _start_ of a frame transmission inside the predefined window without taking the length of the frame into account. Thus, we'll need the guard band which will close the gate early, so that a complete frame can still be sent. Revert the commit and add a note. For a lengthy discussion see [1]. [1] https://lore.kernel.org/netdev/c7618025da6723418c56a54fe4683bd7@walle.cc/ Fixes: 316bcffe44 ("net: dsa: felix: disable always guard band bit for TAS config") Signed-off-by: Michael Walle <michael@walle.cc> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2021-05-10 14:48:55 -07:00
..
felix.c	net: mscc: ocelot: convert to ocelot_port_txtstamp_request()	2021-04-27 14:10:15 -07:00
felix.h	net: dsa: felix: setup MMIO filtering rules for PTP when using tag_8021q	2021-02-14 17:31:44 -08:00
felix_vsc9959.c	net: dsa: felix: re-enable TAS guard band mode	2021-05-10 14:48:55 -07:00
Kconfig	net: dsa: add a second tagger for Ocelot switches based on tag_8021q	2021-01-29 21:25:27 -08:00
Makefile	net: dsa: seville: build as separate module	2020-09-18 17:52:51 -07:00
seville_vsc9953.c	net: dsa: tag_ocelot: create separate tagger for Seville	2021-02-14 17:31:44 -08:00