freebsd with flexible iflib nic queues
dc961de0b4
copper NICs, a link change event is posted whenever MII autopolling is toggled off and on, which happens whenever someone calls bge_miibus_readreg() or bge_miibus_writereg() to access the PHY registers. This means anytime someone called the SIOCGIFMEDIA ioctl on a bge interface, the link would reset. Even a simple "ifconfig bge0" would do it, though other apps like dhclient or the PPPoE daemon could trigger it as well. An obvious symptom of this problem is lots of "bgeX: gigabit link up" messages appearing on the console for no apparent reason. Through experimentation, I determined that when a real link change event occurs, the BGE_MIMODE_AUTOPOLL in the BGE_MI_MODE register is always set, so now if we have a copper NIC and an link change event occurs and the BGE_MIMODE_AUTOPOLL bit is clear, we ignore the event. Note that this does not apply to the original BCM5700 chip since we use a different method for sensing link changes with that chip (the status block method was broken), nor to fiber optic NICs since they don't use the GMII PHY access registers. |
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| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
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| COPYRIGHT | ||
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| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| README | ||
| UPDATING | ||
| UPDATING.64BTT | ||
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