forked from luck/tmp_suning_uos_patched
8700e3e7c4
Soft RoCE (RXE) - The software RoCE driver
ib_rxe implements the RDMA transport and registers to the RDMA core
device as a kernel verbs provider. It also implements the packet IO
layer. On the other hand ib_rxe registers to the Linux netdev stack
as a udp encapsulating protocol, in that case RDMA, for sending and
receiving packets over any Ethernet device. This yields a RDMA
transport over the UDP/Ethernet network layer forming a RoCEv2
compatible device.
The configuration procedure of the Soft RoCE drivers requires
binding to any existing Ethernet network device. This is done with
/sys interface.
A userspace Soft RoCE library (librxe) provides user applications
the ability to run with Soft RoCE devices. The use of rxe verbs ins
user space requires the inclusion of librxe as a device specifics
plug-in to libibverbs. librxe is packaged separately.
Architecture:
+-----------------------------------------------------------+
| Application |
+-----------------------------------------------------------+
+-----------------------------------+
| libibverbs |
User +-----------------------------------+
+----------------+ +----------------+
| librxe | | HW RoCE lib |
+----------------+ +----------------+
+---------------------------------------------------------------+
+--------------+ +------------+
| Sockets | | RDMA ULP |
+--------------+ +------------+
+--------------+ +---------------------+
| TCP/IP | | ib_core |
+--------------+ +---------------------+
+------------+ +----------------+
Kernel | ib_rxe | | HW RoCE driver |
+------------+ +----------------+
+------------------------------------+
| NIC driver |
+------------------------------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+-----------------------------------------------------------+
| Application |
+-----------------------------------------------------------+
+-----------------------------------+
| libibverbs |
User +-----------------------------------+
+----------------+ +----------------+
| librxe | | HW RoCE lib |
+----------------+ +----------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+--------------+ +------------+
| Sockets | | RDMA ULP |
+--------------+ +------------+
+--------------+ +---------------------+
| TCP/IP | | ib_core |
+--------------+ +---------------------+
+------------+ +----------------+
Kernel | ib_rxe | | HW RoCE driver |
+------------+ +----------------+
+------------------------------------+
| NIC driver |
+------------------------------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Soft RoCE resources:
[1[ https://github.com/SoftRoCE/librxe-dev librxe - source code in
Github
[2] https://github.com/SoftRoCE/rxe-dev/wiki/rxe-dev:-Home - Soft RoCE
Wiki page
[3] https://github.com/SoftRoCE/librxe-dev - Soft RoCE userspace library
Signed-off-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
145 lines
3.1 KiB
C
145 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2016 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 RDMA_USER_RXE_H
|
|
#define RDMA_USER_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;
|
|
struct {
|
|
struct ib_mr *mr;
|
|
__u32 key;
|
|
int access;
|
|
} reg;
|
|
} 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 /* RDMA_USER_RXE_H */
|