bus: mhi: pci-generic: configurable network interface MRU

Browse source

The MRU value used by the MHI MBIM network interface affects
the throughput performance of the interface. Different modem
models use different default MRU sizes based on their bandwidth
capabilities. Large values generally result in higher throughput
for larger packet sizes.

In addition if the MRU used by the MHI device is larger than that
specified in the MHI net device the data is fragmented and needs
to be re-assembled which generates a (single) warning message about
the fragmented packets. Setting the MRU on both ends avoids the
extra processing to re-assemble the packets.

This patch allows the documented MRU for a modem to be automatically
set as the MHI net device MRU avoiding fragmentation and improving
throughput performance.

Signed-off-by: Richard Laing <richard.laing@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Richard Laing 2021-07-15 09:18:05 +12:00 • committed by David S. Miller

parent 8096acd744

commit 5c2c853159

4 changed files with 11 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

include/linux/mhi.h

View file