s390/qeth: prepare for copy-free TSO transmission

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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>

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Julian Wiedmann 2018-09-17 17:36:02 +02:00 • committed by David S. Miller

parent 5549426466

commit e517b649b3

4 changed files with 77 additions and 28 deletions

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1

drivers/s390/net/qeth_core.h

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10

drivers/s390/net/qeth_core_main.c

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1

drivers/s390/net/qeth_l2_main.c

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93

drivers/s390/net/qeth_l3_main.c

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