mlx4: Implement memory windows allocation and deallocation

Implement MW allocation and deallocation in mlx4_core and mlx4_ib.
Pass down the enable bind flag when registering memory regions.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Shani Michaeli <shanim@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index e9fe8caaf8bb..67b4695e5940 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -170,6 +170,7 @@ enum {
 #define MLX4_ATTR_EXTENDED_PORT_INFO    cpu_to_be16(0xff90)
 
 enum {
+        MLX4_BMME_FLAG_WIN_TYPE_2B      = 1 <<  1,
         MLX4_BMME_FLAG_LOCAL_INV        = 1 <<  6,
         MLX4_BMME_FLAG_REMOTE_INV       = 1 <<  7,
         MLX4_BMME_FLAG_TYPE_2_WIN       = 1 <<  9,
@@ -237,7 +238,8 @@ enum {
         MLX4_PERM_LOCAL_WRITE   = 1 << 11,
         MLX4_PERM_REMOTE_READ   = 1 << 12,
         MLX4_PERM_REMOTE_WRITE  = 1 << 13,
-        MLX4_PERM_ATOMIC        = 1 << 14
+        MLX4_PERM_ATOMIC        = 1 << 14,
+        MLX4_PERM_BIND_MW       = 1 << 15,
 };
 
 enum {
@@ -503,6 +505,18 @@ struct mlx4_mr {
         int                     enabled;
 };
 
+enum mlx4_mw_type {
+        MLX4_MW_TYPE_1 = 1,
+        MLX4_MW_TYPE_2 = 2,
+};
+
+struct mlx4_mw {
+        u32                     key;
+        u32                     pd;
+        enum mlx4_mw_type       type;
+        int                     enabled;
+};
+
 struct mlx4_fmr {
         struct mlx4_mr          mr;
         struct mlx4_mpt_entry  *mpt;
@@ -803,6 +817,10 @@ int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access,
                   int npages, int page_shift, struct mlx4_mr *mr);
 int mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr);
 int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr);
+int mlx4_mw_alloc(struct mlx4_dev *dev, u32 pd, enum mlx4_mw_type type,
+                  struct mlx4_mw *mw);
+void mlx4_mw_free(struct mlx4_dev *dev, struct mlx4_mw *mw);
+int mlx4_mw_enable(struct mlx4_dev *dev, struct mlx4_mw *mw);
 int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
                    int start_index, int npages, u64 *page_list);
 int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,