IB/mlx5: Add DEVX support for memory registration

Add support to register a memory with the firmware via the DEVX
interface.

The driver translates a given user address to ib_umem then it will
register the physical addresses with the firmware and get a unique id
for this registration to be used for this virtual address.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index ac24ed87c67e..00b539303f5d 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -82,6 +82,7 @@ enum {
 
 enum {
         MLX5_OBJ_TYPE_UCTX = 0x0004,
+        MLX5_OBJ_TYPE_UMEM = 0x0005,
 };
 
 enum {
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index 1252695cd94b..dbc549a7bf50 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -89,9 +89,27 @@ enum mlx5_ib_devx_obj_methods {
         MLX5_IB_METHOD_DEVX_OBJ_QUERY,
 };
 
+enum mlx5_ib_devx_umem_reg_attrs {
+        MLX5_IB_ATTR_DEVX_UMEM_REG_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+        MLX5_IB_ATTR_DEVX_UMEM_REG_ADDR,
+        MLX5_IB_ATTR_DEVX_UMEM_REG_LEN,
+        MLX5_IB_ATTR_DEVX_UMEM_REG_ACCESS,
+        MLX5_IB_ATTR_DEVX_UMEM_REG_OUT_ID,
+};
+
+enum mlx5_ib_devx_umem_dereg_attrs {
+        MLX5_IB_ATTR_DEVX_UMEM_DEREG_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+};
+
+enum mlx5_ib_devx_umem_methods {
+        MLX5_IB_METHOD_DEVX_UMEM_REG = (1U << UVERBS_ID_NS_SHIFT),
+        MLX5_IB_METHOD_DEVX_UMEM_DEREG,
+};
+
 enum mlx5_ib_devx_objects {
         MLX5_IB_OBJECT_DEVX = (1U << UVERBS_ID_NS_SHIFT),
         MLX5_IB_OBJECT_DEVX_OBJ,
+        MLX5_IB_OBJECT_DEVX_UMEM,
 };
 
 #endif