CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2019/04/10 04:03:10
Modified files:
sys/dev/pci : if_ixl.c
Log message:
implement support for SIOCGIFSFFPAGE
this relies on some firmware commands for accessing the i2c bus
that are not available until a relatively recent API version. our
nics using API 1.4 and 1.5 don't handle the command, but the API
1.7 nic we have is happy to talk to the module that is plugged into
it.
xl710 cards (the 40g ones with a qsfp+ connector) can be split up
into 4 functions that represent lanes on a single port. you can get
qsfp+ to 4x sfp+ cables so you can use the different lanes/functions
as completely independent interfaces. however, because each lane/
function is one port and therefore module, we need to serialise
access to the module by at least the port. this is to prevent
concurrent reads of different pages of the one module from stepping
on each other. i took the easy path and made a single ixlsff lock,
which is at least conservative.
