[PATCH] IB/mthca: Split off MTT allocation

Split allocation of MTT range from creation of MR.  This will be useful for
implementing shared memory regions and userspace verbs.
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/infiniband/hw/mthca/mthca_dev.h

@@ -380,6 +380,12 @@ void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar);
 int mthca_pd_alloc(struct mthca_dev *dev, struct mthca_pd *pd);
 void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd);
 
+struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size);
+void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt);
+int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
+		    int start_index, u64 *buffer_list, int list_len);
+int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
+		   u64 iova, u64 total_size, u32 access, struct mthca_mr *mr);
 int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
 			   u32 access, struct mthca_mr *mr);
 int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,

drivers/infiniband/hw/mthca/mthca_provider.h

@@ -54,17 +54,17 @@ struct mthca_uar {
 	int           index;
 };
 
+struct mthca_mtt;
+
 struct mthca_mr {
 	struct ib_mr      ibmr;
-	int order;
-	u32 first_seg;
+	struct mthca_mtt *mtt;
 };
 
 struct mthca_fmr {
 	struct ib_fmr      ibmr;
 	struct ib_fmr_attr attr;
-	int order;
-	u32 first_seg;
+	struct mthca_mtt  *mtt;
 	int                maps;
 	union {
 		struct {