commit 119f53494f1f31b09d1cc84cfd0e3c9feefd0134
author Liam Girdwood <liam.r.girdwood@linux.intel.com> Mon Dec 03 21:11:57 2018 +0000
committer Liam Girdwood <liam.r.girdwood@linux.intel.com> Tue Dec 11 20:23:59 2018 +0000
tree c81329ce1e64cb30aaa00b8fa05af02056a13bb9
parent c42415531f41feb005b09b17d0775ba9f2f66210

abi: ipc: Allow ABI to grow with MINOR/PATCH updates.

This patch allows ABI changes to incrementally grow certain IPC
structure and sub structures without changing MAJOR and keeping
backwards compatability.

Adds some helper IPC copier and validation macros that should be used
when handling external IPC structures. These ensure IPC changes are
handled correctly without causing errors or failures.

IPC size should be the first item in each structure to make it as easy
as possible to manage MINOR and PATCH ABI updates without unnecessary
replacement of FW or kernel.

This patch also makes size first in the IPC command header and introduces
a new header for internal IPC sub structures. The sub structure size
can be used to validate IPC and also be used to grow tail IPC command
sub structures as MINOR/PATCH ABI changes.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>