[Skiboot] [PATCH 14/16] [PATCH 14/16] opencapi5: add opal functions

[Stewart Smith]

On Fri, Aug 20, 2021, at 2:45 AM, Christophe Lombard wrote:
> Add three OPAL API calls that are required by the ocxl driver.
> 
>   - OPAL_PAU_SPA_SETUP
> 
>     The Shared Process Area (SPA) is a table containing one entry (a
>     "Process Element") per memory context which can be accessed by the
>     OpenCAPI device.
> 
>   - OPAL_PAU_SPA_CLEAR_CACHE
> 
>     The PAU keeps a cache of recently accessed memory contexts. When a
>     Process Element is removed from the SPA, the cache for the link must
>     be cleared.
> 
>   - OPAL_PAU_TL_SET
> 
>     The Transaction Layer specification defines several templates for
>     messages to be exchanged on the link. During link setup, the host
>     and device must negotiate what templates are supported on both sides
>     and at what rates those messages can be sent.
> 
> Signed-off-by: Christophe Lombard <clombard at linux.vnet.ibm.com>
> ---
>  hw/npu-opal.c      |   8 +++
>  hw/pau.c           | 159 +++++++++++++++++++++++++++++++++++++++++++++
>  include/pau-regs.h |  13 ++++
>  include/pau.h      |   9 +++
>  4 files changed, 189 insertions(+)

Probably want to add some documentation on the OPAL calls in doc/opal-api/