s390/qeth: prepare for copy-free TSO transmission
authorJulian Wiedmann <jwi@linux.ibm.com>
Mon, 17 Sep 2018 15:36:02 +0000 (17:36 +0200)
committerDavid S. Miller <davem@davemloft.net>
Mon, 17 Sep 2018 16:10:25 +0000 (09:10 -0700)
commite517b649b3c311a8a828b4ee3353bc713e0d5ef0
tree68a3c6a104268cac56c02df996bdcdc239f754d0
parent554942646653c913268da8a7ec02724afe1166cb
s390/qeth: prepare for copy-free TSO transmission

Add all the necessary TSO plumbing to the copy-less transmit path.
This includes calculating the right length of required protocol headers,
and always building a separate buffer element for the TSO headers.

A follow-up patch will then switch TSO traffic over to this path.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/s390/net/qeth_core.h
drivers/s390/net/qeth_core_main.c
drivers/s390/net/qeth_l2_main.c
drivers/s390/net/qeth_l3_main.c