s390/qeth: add xmit_more support for IQD devices

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IQD devices offer limited support for bulking: all frames in a TX buffer
need to have the same target. qeth_iqd_may_bulk() implements this
constraint, and allows us to defer the TX doorbell until
(a) the buffer is full (since each buffer needs its own doorbell), or
(b) the entire TX queue is full, or
(b) we reached the BQL limit.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Julian Wiedmann 2019-08-23 11:48:53 +02:00 • committed by David S. Miller

parent 96bd6c94bd

commit 9549d70a2d

2 changed files with 109 additions and 43 deletions

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24

drivers/s390/net/qeth_core.h

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128

drivers/s390/net/qeth_core_main.c

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