[PATCH][21/27] IB/mthca: split MR key munging routines

[Roland Dreier <roland@topspin.com>]

From: Michael S. Tsirkin <mst@mellanox.co.il>

Split Tavor and Arbel/mem-free index<->hw key munging routines, so that FMR implementation 
can call correct implementation without testing HCA type (which it already knows).

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <roland@topspin.com>


--- linux-export.orig/drivers/infiniband/hw/mthca/mthca_mr.c	2005-04-01 12:38:27.075083423 -0800
+++ linux-export/drivers/infiniband/hw/mthca/mthca_mr.c	2005-04-01 12:38:28.676735749 -0800
@@ -198,20 +198,40 @@
 				      seg + (1 << order) - 1);
 }
 
+static inline u32 tavor_hw_index_to_key(u32 ind)
+{
+	return ind;
+}
+
+static inline u32 tavor_key_to_hw_index(u32 key)
+{
+	return key;
+}
+
+static inline u32 arbel_hw_index_to_key(u32 ind)
+{
+	return (ind >> 24) | (ind << 8);
+}
+
+static inline u32 arbel_key_to_hw_index(u32 key)
+{
+	return (key << 24) | (key >> 8);
+}
+
 static inline u32 hw_index_to_key(struct mthca_dev *dev, u32 ind)
 {
 	if (dev->hca_type == ARBEL_NATIVE)
-		return (ind >> 24) | (ind << 8);
+		return arbel_hw_index_to_key(ind);
 	else
-		return ind;
+		return tavor_hw_index_to_key(ind);
 }
 
 static inline u32 key_to_hw_index(struct mthca_dev *dev, u32 key)
 {
 	if (dev->hca_type == ARBEL_NATIVE)
-		return (key << 24) | (key >> 8);
+		return arbel_key_to_hw_index(key);
 	else
-		return key;
+		return tavor_key_to_hw_index(key);
 }
 
 int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,