IB/mlx4: Implement FMRs

Implement FMRs for mlx4.  This is an adaptation of code from mthca.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index a93520c76fde..222815d91c40 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -214,6 +214,17 @@ struct mlx4_mr {
         int                     enabled;
 };
 
+struct mlx4_fmr {
+        struct mlx4_mr          mr;
+        struct mlx4_mpt_entry  *mpt;
+        __be64                 *mtts;
+        dma_addr_t              dma_handle;
+        int                     max_pages;
+        int                     max_maps;
+        int                     maps;
+        u8                      page_shift;
+};
+
 struct mlx4_uar {
         unsigned long           pfn;
         int                     index;
@@ -337,4 +348,14 @@ int mlx4_CLOSE_PORT(struct mlx4_dev *dev, int port);
 int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]);
 int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]);
 
+int mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list,
+                      int npages, u64 iova, u32 *lkey, u32 *rkey);
+int mlx4_fmr_alloc(struct mlx4_dev *dev, u32 pd, u32 access, int max_pages,
+                   int max_maps, u8 page_shift, struct mlx4_fmr *fmr);
+int mlx4_fmr_enable(struct mlx4_dev *dev, struct mlx4_fmr *fmr);
+void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr,
+                    u32 *lkey, u32 *rkey);
+int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr);
+int mlx4_SYNC_TPT(struct mlx4_dev *dev);
+
 #endif /* MLX4_DEVICE_H */