Expand bindings to support mlx5dv wqe (#453)

Summary:
Pull Request resolved: #453

For advanced RDMA support we need to expose bindings to work queue entries (lower level apis)

Reviewed By: allenwang28

Differential Revision: D77898106

fbshipit-source-id: 0042d9d609d4b352f29b4f6bf8643ec12e9eb4ec

Author: dstaay-fb

rdmacore-sys/src/lib.rs

@@ -9,6 +9,17 @@
 // sections of code adapted from https://github.com/jonhoo/rust-ibverbs
 // Copyright (c) 2016 Jon Gjengset under MIT License (MIT)
 
+#[repr(C, align(4))]
+#[derive(Debug, Default, Clone, Copy)]
+pub struct mlx5_wqe_ctrl_seg {
+    pub opmod_idx_opcode: u32,
+    pub qpn_ds: u32,
+    pub signature: u8,
+    pub dci_stream_channel_id: u16,
+    pub fm_ce_se: u8,
+    pub imm: u32,
+}
+
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct ibv_wc {