Merge branch 'net-mlx5e-shampo-allow-high-order-pages-in-zerocopy-mode'

Tariq Toukan says:

====================
net/mlx5e: SHAMPO, Allow high order pages in zerocopy mode

This series adds support for high order pages when io_uring/devmem
zero copy is used.

See detailed description by Dragos below.

The first patches are moving code around to allow using queue specific
parameters that are not just for XSK. They are a bit large as they touch
a lot of functions.

The middle part of the series is updating various formulas to remove
remaining hardcoded use of PAGE_SIZE/PAGE_SHIFT.

The last part adds support for high order pages by implementing the
queue configuration functions and allowing larger rx_page_size
configurations when in zero-copy mode.

Results show an increase in BW and a decrease in CPU usage.
The benchmark was done with the zcrx samples from liburing [0].

rx_buf_len=4K, oncpu [1]:
packets=3358832 (MB=820027), rps=55794 (MB/s=13621)
Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
Average:       9    1.56    0.00   18.09   13.42    0.00   66.80    0.00    0.00    0.00    0.12

rx_buf_len=128K, oncpu [2]:
packets=3781376 (MB=923187), rps=62813 (MB/s=15335)
Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
Average:       9    0.33    0.00    7.61   18.86    0.00   73.08    0.00    0.00    0.00    0.12

rx_buf_len=4K, offcpu [3]:
packets=3460368 (MB=844816), rps=57481 (MB/s=14033)
Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
Average:       9    0.00    0.00    0.26    0.00    0.00   92.63    0.00    0.00    0.00    7.11
Average:      11    3.04    0.00   68.09   28.87    0.00    0.00    0.00    0.00    0.00    0.00

rx_buf_len=128K, offcpu [4]:
packets=4119840 (MB=1005820), rps=68435 (MB/s=16707)
Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
Average:       9    0.00    0.00    0.87    0.00    0.00   63.77    0.00    0.00    0.00   35.36
Average:      11    1.96    0.00   43.68   54.37    0.00    0.00    0.00    0.00    0.00    0.00

[0] https://github.com/isilence/liburing/tree/zcrx/rx-buf-len

[1] commands:
  $> taskset -c 9 ./zcrx 6 -i eth2 -q 9 -A 1 -B 4096 -S 33554432
  $> ./send-zerocopy tcp -6 -D 2001:db8::1 -t 60 -C 0 -l 1 -b 1 -n 1 -z 1 -d -s 256000

[2] commands:
  $> taskset -c 9 ./zcrx 6 -i eth2 -q 9 -A 1 -B 131072 -S 33554432
  $> ./send-zerocopy tcp -6 -D 2001:db8::1 -t 60 -C 0 -l 1 -b 1 -n 1 -z 1 -d -s 256000

[3] commands:
  $> taskset -c 11 ./zcrx 6 -i eth2 -q 9 -A 1 -B 4096 -S 33554432
  $> ./send-zerocopy tcp -6 -D 2001:db8::1 -t 60 -C 0 -l 1 -b 1 -n 1 -z 1 -d -s 256000

[4] commands:
  $> taskset -c 11 ./zcrx 6 -i eth2 -q 9 -A 1 -B 131072 -S 33554432
  $> ./send-zerocopy tcp -6 -D 2001:db8::1 -t 60 -C 0 -l 1 -b 1 -n 1 -z 1 -d -s 256000
====================

Link: https://patch.msgid.link/20260223204155.1783580-1-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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