npu2: Move to new GPU memory map

There are three different ways we configure the MCD and memory map.

1) Old way (current way)
   Skiboot configures the MCD and puts GPUs at 4TB and below
2) New way with MCD
   Hostboot configures the MCD and skiboot puts GPU at 4TB and above
3) New way without MCD
   No one configures the MCD and skiboot puts GPU at 4TB and below

The patch keeps option 1 and adds options 2 and 3.

The different configurations are detected using certain scoms (see
patch).

Option 1 will go away eventually as it's a configuration that can
cause xstops or data integrity problems. We are keeping it around to
support existing hostboot.

Option 2 supports only 4 GPUs and 512GB of memory per socket.

Option 3 supports 6 GPUs and 4TB of memory but may have some
performance impact.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/npu2.h b/include/npu2.h
index d30a91f1..95638697 100644
--- a/include/npu2.h
+++ b/include/npu2.h
@@ -128,6 +128,7 @@ struct npu2 {
 	uint32_t	base_lsi;
 	uint32_t	total_devices;
 	struct npu2_dev	*devices;
+	enum phys_map_type gpu_map_type;
 
 	/* IODA cache */
 	uint64_t	lxive_cache[8];