Signed-off-by: Michael Brown <mcb30@ipxe.org>

Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Intel virtual function NICs almost work with the use of "legacy"
transmit and receive descriptors (which are backwards compatible right
back to the original Intel Gigabit NICs).

Unfortunately the "TX switching" feature (which allows for VM<->VM
traffic to be looped back within the NIC itself) does not work when a
legacy TX descriptor is used: the packet is instead sent onto the
wire.

Fix by allowing for the use of an "advanced" TX descriptor (containing
exactly the same information as is found in the "legacy" descriptor).

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Identifiers are based on defines in Linux ixgbe_type.h.

Descriptive names are based on
https://www-ssl.intel.com/content/www/us/en/ethernet-controllers/82599-10-gbe-controller-spec-update.html
and
https://www-ssl.intel.com/content/www/us/en/network-adapters/10-gigabit-network-adapters/ethernet-x540-spec-update.html

Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

Relicense files for which I am the sole author (as identified by
util/relicense.pl).

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

Debugged-by: Anton D. Kachalov <mouse@yandex-team.ru>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

Tested-by: Philipp Hagen <Philipp.Hagen@she.net>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

Signed-off-by: Michael Brown <mcb30@ipxe.org>