Christophe Lombard 3ced8d7300
cxl: Export library to support IBM XSL ...
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: Andrew Donnellan <andrew.donnellan@au1.ibm.com >
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com >
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
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3ced8d7300