mlxsw: spectrum: Add another partition to KVD linear

The KVD linear is currently partitioned into two partitions. One for
single entries and another for groups of 32 entries.

Add another partition consisting of groups of 512 entries which will
allow us to more accurately represent the nexthop weights in non-equal
cost multi-path routing.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c

@@ -41,13 +41,22 @@
 #define MLXSW_SP_KVDL_SINGLE_SIZE 16384
 #define MLXSW_SP_KVDL_SINGLE_END \
 	(MLXSW_SP_KVDL_SINGLE_SIZE + MLXSW_SP_KVDL_SINGLE_BASE - 1)
+
 #define MLXSW_SP_KVDL_CHUNKS_BASE \
 	(MLXSW_SP_KVDL_SINGLE_BASE + MLXSW_SP_KVDL_SINGLE_SIZE)
-#define MLXSW_SP_KVDL_CHUNKS_SIZE \
-	(MLXSW_SP_KVD_LINEAR_SIZE - MLXSW_SP_KVDL_CHUNKS_BASE)
+#define MLXSW_SP_KVDL_CHUNKS_SIZE 49152
 #define MLXSW_SP_KVDL_CHUNKS_END \
 	(MLXSW_SP_KVDL_CHUNKS_SIZE + MLXSW_SP_KVDL_CHUNKS_BASE - 1)
+
+#define MLXSW_SP_KVDL_LARGE_CHUNKS_BASE \
+	(MLXSW_SP_KVDL_CHUNKS_BASE + MLXSW_SP_KVDL_CHUNKS_SIZE)
+#define MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE \
+	(MLXSW_SP_KVD_LINEAR_SIZE - MLXSW_SP_KVDL_LARGE_CHUNKS_BASE)
+#define MLXSW_SP_KVDL_LARGE_CHUNKS_END \
+	(MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP_KVDL_LARGE_CHUNKS_BASE - 1)
+
 #define MLXSW_SP_CHUNK_MAX 32
+#define MLXSW_SP_LARGE_CHUNK_MAX 512
 
 struct mlxsw_sp_kvdl_part_info {
 	unsigned int part_index;
@@ -192,6 +201,12 @@ static const struct mlxsw_sp_kvdl_part_info kvdl_parts_info[] = {
 		.end_index	= MLXSW_SP_KVDL_CHUNKS_END,
 		.alloc_size	= MLXSW_SP_CHUNK_MAX,
 	},
+	{
+		.part_index	= 2,
+		.start_index	= MLXSW_SP_KVDL_LARGE_CHUNKS_BASE,
+		.end_index	= MLXSW_SP_KVDL_LARGE_CHUNKS_END,
+		.alloc_size	= MLXSW_SP_LARGE_CHUNK_MAX,
+	},
 };
 
 static struct mlxsw_sp_kvdl_part *