What this provides is support for the 'virtual function'
interface that a FreeBSD VM may be assigned from a host
like KVM on Linux, or newer versions of Xen with such
support.
When the guest is set up with the capability, a special
limited function 82576 PCI device is present in its virtual
PCI space, so with this driver installed in the guest that
device will be detected and function nearly like the bare
metal, as it were.
The interface is only allowed a single queue in this configuration
however initial performance tests have looked very good.
Enjoy!!
Remove unneeded rxtx handler, make que handler generic.
Do not allocate header mbufs in rx ring if not doing hdr split.
Release the lock in rxeof call to stack.
MFC for 8.1 asap
VLAN HWFILTER from being used by default, this breaks
stacked pseudo devices, and as it turns out, also breaks
virtual machines that happen to use VLANS (didn't know that
before :). Put the fix back into the em driver, and for good
measure add the same code to the igb driver where it should
have been anyway.
change the argument type to igb_rxeof() to the
correct type. Note, any users of POLLING must
be sure and set the number of queues to 1 for
things to work correctly.
em revision 7.0.0:
- Using driver devclass, seperate legacy (pre-pcie) code
into a seperate source file. This will at least help
protect against regression issues. It compiles along
with em, and is transparent to end use, devices in each
appear to be 'emX'. When using em in a modular form this
also allows the legacy stuff to be defined out.
- Add tx and rx rings as in igb, in the 82574 this becomes
actual multiqueue for the first time (2 queues) while in
other PCIE adapters its just make code cleaner.
- Add RX mbuf handling logic that matches igb, this will
eliminate packet drops due to temporary mbuf shortage.
igb revision 1.9.3:
- Following the ixgbe code, use a new approach in what
was called 'get_buf', the routine now has been made
independent of rxeof, it now does the update to the
engine TDT register, this design allows temporary
mbuf resources to become non-critical, not requiring
a packet to be discarded, instead it just returns and
does not increment the tail pointer.
- With the above change it was also unnecessary to keep
'spare' maps around, since we do not have the discard
issue.
- Performance tweaks and improvements to the code also.
MFC in a week
- introduce drbr_needs_enqueue that returns whether the interface/br needs
an enqueue operation: returns true if altq is enabled or there are
already packets in the ring (as we need to maintain packet order)
- update all drbr consumers
- fix drbr_flush
- avoid using the driver queue (IFQ_DRV_*) in the altq case as the
multiqueue consumer does not provide enough protection, serialize altq
interaction with the main queue lock
- make drbr_dequeue_cond work with altq
Discussed with: kmacy, yongari, jfv
MFC after: 4 weeks
igb now has a queue notion that has a single interrupt
with an RX/TX pair, this will reduce the total interrupts
seen on a system. Both em and igb have a new watchdog
method. igb has fixes from Pyun Yong-Hyeon that have
improved stability, thank you :)
I wish to MFC this for 7.3 asap, please test if able.
drivers. These add new hardware support, most importantly
the pch (i5 chipset) in the em driver. Also, both drivers
now have the simplified (and I hope improved) watchdog
code. The igb driver uses the new RX cleanup that I
first implemented in ixgbe.
em - version 6.9.24
igb - version 1.8.4
page fault panic on initialization due to a large
number of bounce pages being allocated. This is due
to the dma tag requiring page alignment on mbuf mapping.
This was removed some time back from the ixgbe driver
and is not needed here either.
Without this changeset there will be no way to prevent these NICs from
sending ARP, which is harmful in server farms that is configured as
"Direct Server Return" behind a load balancer.
A better fix would remove the whole hack completely but it would be
later than 8.0-RELEASE.
Reviewed by: jfv, yongari
Approved by: re (kib)
- When a vlan event occurs a check was not made that
the event was actually for the interface, thus resulting
in a panic. All three drivers have this vulnerability. Add
a check for this condition.
- Secondly, there was a duplicate buf_ring free in the em
driver resulting in a panic on unload. Remove.
Approved by: re
IF_ADDR_UNLOCK() across network device drivers when accessing the
per-interface multicast address list, if_multiaddrs. This will
allow us to change the locking strategy without affecting our driver
programming interface or binary interface.
For two wireless drivers, remove unnecessary locking, since they
don't actually access the multicast address list.
Approved by: re (kib)
MFC after: 6 weeks
will sometimes fail to initialize problem due to a lock
contention with management hardware. However, in order to
deliver that fix it was necessary to take a shared code
update as a whole, and this required scattered changes in
the core code to be compatible.
The em driver now has VLAN HW support added as the igb
driver had previously.
MFC after: ASAP - in time for 7.1 RELEASE
- changes in support of the VLAN filter fix to 126850
- removal of a bunch of legacy code that was cruft, if not
possibly harmful.
- removal of POLLING from this driver, with multiqueue and
MSIX it just makes no sense here.
- Fix an LRO bug that I've been working on internally, intermittent
panics under stress, the problem was releasing the RX ring lock
before the LRO flushing.
- Following the above fix I now enable LRO by default
- For performance reasons increase the default number of RX queues
to 4.
- Add AIM - "Adaptive Interrupt Moderation", a fancy way of saying
that the EITR value is dynamically changed based on the size of
packets in the last interrupt interval.
- Much goodness to try, enjoy!!
proved to be necessary to make the static drivers work
in EITHER/OR or BOTH configurations. Modules will still
build in sys/modules/igb or em as before.
This also updates the igb driver for support for the 82576
adapter, adds shared code fixes, and etc....
MFC after: ASAP
