[PATCH rdma-next 28/29] IB/rxe: Shared objects between user and kernel

Moni Shoua
2016-06-02T16:57:36Z

User and kernel pass objects in shared memeory. For this both sides need
to declare about the layout of each object in memory or in other words:
agree about the ABI.

Signed-off-by: Kamal Heib <kamalh-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Amir Vadai <amirv-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Moni Shoua <monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Reviewed-by: Haggai Eran <haggaie-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
include/uapi/rdma/Kbuild | 1 +
include/uapi/rdma/ib_rxe.h | 139 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 140 insertions(+)
create mode 100644 include/uapi/rdma/ib_rxe.h

diff --git a/include/uapi/rdma/Kbuild b/include/uapi/rdma/Kbuild
index 231901b..94f9401 100644
--- a/include/uapi/rdma/Kbuild
+++ b/include/uapi/rdma/Kbuild
@@ -6,3 +6,4 @@ header-y += ib_user_verbs.h
header-y += rdma_netlink.h
header-y += rdma_user_cm.h
header-y += hfi/
+header-y += ib_rxe.h
diff --git a/include/uapi/rdma/ib_rxe.h b/include/uapi/rdma/ib_rxe.h
new file mode 100644
index 0000000..eb8ff8c
--- /dev/null
+++ b/include/uapi/rdma/ib_rxe.h
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2015 Mellanox Technologies Ltd. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef IB_RXE_H
+#define IB_RXE_H
+
+#include <linux/types.h>
+
+union rxe_gid {
+ __u8 raw[16];
+ struct {
+ __be64 subnet_prefix;
+ __be64 interface_id;
+ } global;
+};
+
+struct rxe_global_route {
+ union rxe_gid dgid;
+ __u32 flow_label;
+ __u8 sgid_index;
+ __u8 hop_limit;
+ __u8 traffic_class;
+};
+
+struct rxe_av {
+ __u8 port_num;
+ __u8 network_type;
+ struct rxe_global_route grh;
+ union {
+ struct sockaddr _sockaddr;
+ struct sockaddr_in _sockaddr_in;
+ struct sockaddr_in6 _sockaddr_in6;
+ } sgid_addr, dgid_addr;
+};
+
+struct rxe_send_wr {
+ __u64 wr_id;
+ __u32 num_sge;
+ __u32 opcode;
+ __u32 send_flags;
+ union {
+ __be32 imm_data;
+ __u32 invalidate_rkey;
+ } ex;
+ union {
+ struct {
+ __u64 remote_addr;
+ __u32 rkey;
+ } rdma;
+ struct {
+ __u64 remote_addr;
+ __u64 compare_add;
+ __u64 swap;
+ __u32 rkey;
+ } atomic;
+ struct {
+ __u32 remote_qpn;
+ __u32 remote_qkey;
+ __u16 pkey_index;
+ } ud;
+ } wr;
+};
+
+struct rxe_sge {
+ __u64 addr;
+ __u32 length;
+ __u32 lkey;
+};
+
+struct mminfo {
+ __u64 offset;
+ __u32 size;
+ __u32 pad;
+};
+
+struct rxe_dma_info {
+ __u32 length;
+ __u32 resid;
+ __u32 cur_sge;
+ __u32 num_sge;
+ __u32 sge_offset;
+ union {
+ __u8 inline_data[0];
+ struct rxe_sge sge[0];
+ };
+};
+
+struct rxe_send_wqe {
+ struct rxe_send_wr wr;
+ struct rxe_av av;
+ __u32 status;
+ __u32 state;
+ __u64 iova;
+ __u32 mask;
+ __u32 first_psn;
+ __u32 last_psn;
+ __u32 ack_length;
+ __u32 ssn;
+ __u32 has_rd_atomic;
+ struct rxe_dma_info dma;
+};
+
+struct rxe_recv_wqe {
+ __u64 wr_id;
+ __u32 num_sge;
+ __u32 padding;
+ struct rxe_dma_info dma;
+};
+
+#endif /* IB_RXE_H */
--
1.8.3.1