[PATCH V3] cxl: Export library to support IBM XSL

[Michael Ellerman]

Christophe Lombard <clombard at linux.vnet.ibm.com> writes:

> This patch exports a in-kernel 'library' API which can be called by
> other drivers to help interacting with an IBM XSL on a POWER9 system.
>
> The XSL (Translation Service Layer) is a stripped down version of the
> PSL (Power Service Layer) used in some cards such as the Mellanox CX5.
> Like the PSL, it implements the CAIA architecture, but has a number
> of differences, mostly in it's implementation dependent registers.
>
> The XSL also uses a special DMA cxl mode, which uses a slightly
> different init sequence for the CAPP and PHB.
>
> Signed-off-by: Christophe Lombard <clombard at linux.vnet.ibm.com>

Andrew sent you a SOB for parts he wrote, so you should include that.

Waiting for an ack from Fred before I merge this.

cheers