linux/drivers/s390
Julian Wiedmann 7a4b92e8e0 s390/qeth: also use TX NAPI for non-IQD devices
Set scan_threshold = 0 to opt out from the qdio layer's internal tasklet
& timer mechanism for TX completions, and replace it with the TX NAPI
infrastructure that qeth already uses for IQD devices. This avoids the
fragile logic in qdio_check_output_queue(), enables tighter integration
and gives us more tuning options via ethtool in the future.

For now we continue to apply the same policy as the qdio layer:
scan for completions if 32 TX buffers are in use, or after 1 sec.
A re-scan is done after 10 sec, but only if no TX interrupt is pending.

With scan_threshold = 0 we no longer get TX completion scans from
within qdio_get_next_buffers(). So trigger these manually in qeth_poll()
and in the RX path switch to the equivalent qdio_inspect_queue().

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-11 12:49:15 -07:00
..
block s390: dasd: Mundane spelling fixes 2021-05-03 11:00:11 -06:00
char s390 updates for 5.13 merge window 2021-04-27 17:54:15 -07:00
cio more s390 updates for 5.13 merge window 2021-05-06 14:39:50 -07:00
crypto VFIO updates for v5.13-rc1 2021-04-28 17:19:47 -07:00
net s390/qeth: also use TX NAPI for non-IQD devices 2021-06-11 12:49:15 -07:00
scsi SCSI misc on 20210428 2021-04-28 17:22:10 -07:00
virtio virtio/s390: implement virtio-ccw revision 2 correctly 2021-02-24 00:31:23 +01:00
Makefile s390: remove pointless drivers-y in drivers/s390/Makefile 2019-09-16 13:21:51 +02:00