[PATCH net-next v4 0/6] net/ncsi: Allow enabling multiple packages & channels

[David Miller]

From: Samuel Mendoza-Jonas <sam at mendozajonas.com>
Date: Fri, 16 Nov 2018 15:51:53 +1100

> This series extends the NCSI driver to configure multiple packages
> and/or channels simultaneously. Since the RFC series this includes a few
> extra changes to fix areas in the driver that either made this harder or
> were roadblocks due to deviations from the NCSI specification.
> 
> Patches 1 & 2 fix two issues where the driver made assumptions about the
> capabilities of the NCSI topology.
> Patches 3 & 4 change some internal semantics slightly to make multi-mode
> easier.
> Patch 5 introduces a cleaner way of reconfiguring the NCSI configuration
> and keeping track of channel states.
> Patch 6 implements the main multi-package/multi-channel configuration,
> configured via the Netlink interface.
> 
> Readers who have an interesting NCSI setup - especially multi-package
> with HWA - please test! I think I've covered all permutations but I
> don't have infinite hardware to test on.
> 
> Changes in v2:
> - Updated use of the channel lock in ncsi_reset_dev(), making the
> channel invisible and leaving the monitor check to
> ncsi_stop_channel_monitor().
> - Fixed ncsi_channel_is_tx() to consider the state of channels in other
> packages.
> Changes in v3:
> - Fixed bisectability bug in patch 1
> - Consider channels on all packages in a few places when multi-package
> is enabled.
> - Avoid doubling up reset operations, and check the current driver state
> before reset to let any running operations complete.
> - Reorganise the LSC handler slightly to avoid enabling Tx twice.
> Changes in v4:
> - Fix failover in the single-channel case
> - Better handle ncsi_reset_dev() entry during a current config/suspend
> operation.

Series applied.