Merge tag 'mlx5-updates-2023-10-10' of git://git.kernel.org/pub/scm/linux/kernel...

Saeed Mahameed says:

====================
mlx5-updates-2023-10-10

1) Adham Faris, Increase max supported channels number to 256

2) Leon Romanovsky, Allow IPsec soft/hard limits in bytes

3) Shay Drory, Replace global mlx5_intf_lock with
   HCA devcom component lock

4) Wei Zhang, Optimize SF creation flow

During SF creation, HCA state gets changed from INVALID to
IN_USE step by step. Accordingly, FW sends vhca event to
driver to inform about this state change asynchronously.
Each vhca event is critical because all related SW/FW
operations are triggered by it.

Currently there is only a single mlx5 general event handler
which not only handles vhca event but many other events.
This incurs huge bottleneck because all events are forced
to be handled in serial manner.

Moreover, all SFs share same table_lock which inevitably
impacts each other when they are created in parallel.

This series will solve this issue by:

1. A dedicated vhca event handler is introduced to eliminate
   the mutual impact with other mlx5 events.
2. Max FW threads work queues are employed in the vhca event
   handler to fully utilize FW capability.
3. Redesign SF active work logic to completely remove
   table_lock.

With above optimization, SF creation time is reduced by 25%,
i.e. from 80s to 60s when creating 100 SFs.

Patches summary:

Patch 1 - implement dedicated vhca event handler with max FW
          cmd threads of work queues.
Patch 2 - remove table_lock by redesigning SF active work
          logic.

* tag 'mlx5-updates-2023-10-10' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5e: Allow IPsec soft/hard limits in bytes
  net/mlx5e: Increase max supported channels number to 256
  net/mlx5e: Preparations for supporting larger number of channels
  net/mlx5e: Refactor mlx5e_rss_init() and mlx5e_rss_free() API's
  net/mlx5e: Refactor mlx5e_rss_set_rxfh() and mlx5e_rss_get_rxfh()
  net/mlx5e: Refactor rx_res_init() and rx_res_free() APIs
  net/mlx5e: Use PTR_ERR_OR_ZERO() to simplify code
  net/mlx5: Use PTR_ERR_OR_ZERO() to simplify code
  net/mlx5: fix config name in Kconfig parameter documentation
  net/mlx5: Remove unused declaration
  net/mlx5: Replace global mlx5_intf_lock with HCA devcom component lock
  net/mlx5: Refactor LAG peer device lookout bus logic to mlx5 devcom
  net/mlx5: Avoid false positive lockdep warning by adding lock_class_key
  net/mlx5: Redesign SF active work to remove table_lock
  net/mlx5: Parallelize vhca event handling
====================

Link: https://lore.kernel.org/r/20231014171908.290428-1-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>