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/*
* Copyright (c) 2010-2014 Intel Corporation. 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.
*/
#if !defined(RDMA_VERBS_H)
#define RDMA_VERBS_H
#include <assert.h>
#include <infiniband/verbs.h>
#include <rdma/rdma_cma.h>
#include <errno.h>
#ifdef __cplusplus
extern "C" {
#endif
static inline int rdma_seterrno(int ret)
{
if (ret) {
errno = ret;
ret = -1;
}
return ret;
}
/*
* Shared receive queues.
*/
int rdma_create_srq(struct rdma_cm_id *id, struct ibv_pd *pd,
struct ibv_srq_init_attr *attr);
int rdma_create_srq_ex(struct rdma_cm_id *id, struct ibv_srq_init_attr_ex *attr);
void rdma_destroy_srq(struct rdma_cm_id *id);
/*
* Memory registration helpers.
*/
static inline struct ibv_mr *
rdma_reg_msgs(struct rdma_cm_id *id, void *addr, size_t length)
{
return ibv_reg_mr(id->pd, addr, length, IBV_ACCESS_LOCAL_WRITE);
}
static inline struct ibv_mr *
rdma_reg_read(struct rdma_cm_id *id, void *addr, size_t length)
{
return ibv_reg_mr(id->pd, addr, length, IBV_ACCESS_LOCAL_WRITE |
IBV_ACCESS_REMOTE_READ);
}
static inline struct ibv_mr *
rdma_reg_write(struct rdma_cm_id *id, void *addr, size_t length)
{
return ibv_reg_mr(id->pd, addr, length, IBV_ACCESS_LOCAL_WRITE |
IBV_ACCESS_REMOTE_WRITE);
}
static inline int
rdma_dereg_mr(struct ibv_mr *mr)
{
return rdma_seterrno(ibv_dereg_mr(mr));
}
/*
* Vectored send, receive, and RDMA operations.
* Support multiple scatter-gather entries.
*/
static inline int
rdma_post_recvv(struct rdma_cm_id *id, void *context, struct ibv_sge *sgl,
int nsge)
{
struct ibv_recv_wr wr, *bad;
wr.wr_id = (uintptr_t) context;
wr.next = NULL;
wr.sg_list = sgl;
wr.num_sge = nsge;
if (id->srq)
return rdma_seterrno(ibv_post_srq_recv(id->srq, &wr, &bad));
else
return rdma_seterrno(ibv_post_recv(id->qp, &wr, &bad));
}
static inline int
rdma_post_sendv(struct rdma_cm_id *id, void *context, struct ibv_sge *sgl,
int nsge, int flags)
{
struct ibv_send_wr wr, *bad;
wr.wr_id = (uintptr_t) context;
wr.next = NULL;
wr.sg_list = sgl;
wr.num_sge = nsge;
wr.opcode = IBV_WR_SEND;
wr.send_flags = flags;
return rdma_seterrno(ibv_post_send(id->qp, &wr, &bad));
}
static inline int
rdma_post_readv(struct rdma_cm_id *id, void *context, struct ibv_sge *sgl,
int nsge, int flags, uint64_t remote_addr, uint32_t rkey)
{
struct ibv_send_wr wr, *bad;
wr.wr_id = (uintptr_t) context;
wr.next = NULL;
wr.sg_list = sgl;
wr.num_sge = nsge;
wr.opcode = IBV_WR_RDMA_READ;
wr.send_flags = flags;
wr.wr.rdma.remote_addr = remote_addr;
wr.wr.rdma.rkey = rkey;
return rdma_seterrno(ibv_post_send(id->qp, &wr, &bad));
}
static inline int
rdma_post_writev(struct rdma_cm_id *id, void *context, struct ibv_sge *sgl,
int nsge, int flags, uint64_t remote_addr, uint32_t rkey)
{
struct ibv_send_wr wr, *bad;
wr.wr_id = (uintptr_t) context;
wr.next = NULL;
wr.sg_list = sgl;
wr.num_sge = nsge;
wr.opcode = IBV_WR_RDMA_WRITE;
wr.send_flags = flags;
wr.wr.rdma.remote_addr = remote_addr;
wr.wr.rdma.rkey = rkey;
return rdma_seterrno(ibv_post_send(id->qp, &wr, &bad));
}
/*
* Simple send, receive, and RDMA calls.
*/
static inline int
rdma_post_recv(struct rdma_cm_id *id, void *context, void *addr,
size_t length, struct ibv_mr *mr)
{
struct ibv_sge sge;
assert((addr >= mr->addr) &&
(((uint8_t *) addr + length) <= ((uint8_t *) mr->addr + mr->length)));
sge.addr = (uint64_t) (uintptr_t) addr;
sge.length = (uint32_t) length;
sge.lkey = mr->lkey;
return rdma_post_recvv(id, context, &sge, 1);
}
static inline int
rdma_post_send(struct rdma_cm_id *id, void *context, void *addr,
size_t length, struct ibv_mr *mr, int flags)
{
struct ibv_sge sge;
sge.addr = (uint64_t) (uintptr_t) addr;
sge.length = (uint32_t) length;
sge.lkey = mr ? mr->lkey : 0;
return rdma_post_sendv(id, context, &sge, 1, flags);
}
static inline int
rdma_post_read(struct rdma_cm_id *id, void *context, void *addr,
size_t length, struct ibv_mr *mr, int flags,
uint64_t remote_addr, uint32_t rkey)
{
struct ibv_sge sge;
sge.addr = (uint64_t) (uintptr_t) addr;
sge.length = (uint32_t) length;
sge.lkey = mr->lkey;
return rdma_post_readv(id, context, &sge, 1, flags, remote_addr, rkey);
}
static inline int
rdma_post_write(struct rdma_cm_id *id, void *context, void *addr,
size_t length, struct ibv_mr *mr, int flags,
uint64_t remote_addr, uint32_t rkey)
{
struct ibv_sge sge;
sge.addr = (uint64_t) (uintptr_t) addr;
sge.length = (uint32_t) length;
sge.lkey = mr ? mr->lkey : 0;
return rdma_post_writev(id, context, &sge, 1, flags, remote_addr, rkey);
}
static inline int
rdma_post_ud_send(struct rdma_cm_id *id, void *context, void *addr,
size_t length, struct ibv_mr *mr, int flags,
struct ibv_ah *ah, uint32_t remote_qpn)
{
struct ibv_send_wr wr, *bad;
struct ibv_sge sge;
sge.addr = (uint64_t) (uintptr_t) addr;
sge.length = (uint32_t) length;
sge.lkey = mr ? mr->lkey : 0;
wr.wr_id = (uintptr_t) context;
wr.next = NULL;
wr.sg_list = &sge;
wr.num_sge = 1;
wr.opcode = IBV_WR_SEND;
wr.send_flags = flags;
wr.wr.ud.ah = ah;
wr.wr.ud.remote_qpn = remote_qpn;
wr.wr.ud.remote_qkey = RDMA_UDP_QKEY;
return rdma_seterrno(ibv_post_send(id->qp, &wr, &bad));
}
static inline int
rdma_get_send_comp(struct rdma_cm_id *id, struct ibv_wc *wc)
{
struct ibv_cq *cq;
void *context;
int ret;
do {
ret = ibv_poll_cq(id->send_cq, 1, wc);
if (ret)
break;
ret = ibv_req_notify_cq(id->send_cq, 0);
if (ret)
return rdma_seterrno(ret);
ret = ibv_poll_cq(id->send_cq, 1, wc);
if (ret)
break;
ret = ibv_get_cq_event(id->send_cq_channel, &cq, &context);
if (ret)
return ret;
assert(cq == id->send_cq && context == id);
ibv_ack_cq_events(id->send_cq, 1);
} while (1);
return (ret < 0) ? rdma_seterrno(ret) : ret;
}
static inline int
rdma_get_recv_comp(struct rdma_cm_id *id, struct ibv_wc *wc)
{
struct ibv_cq *cq;
void *context;
int ret;
do {
ret = ibv_poll_cq(id->recv_cq, 1, wc);
if (ret)
break;
ret = ibv_req_notify_cq(id->recv_cq, 0);
if (ret)
return rdma_seterrno(ret);
ret = ibv_poll_cq(id->recv_cq, 1, wc);
if (ret)
break;
ret = ibv_get_cq_event(id->recv_cq_channel, &cq, &context);
if (ret)
return ret;
assert(cq == id->recv_cq && context == id);
ibv_ack_cq_events(id->recv_cq, 1);
} while (1);
return (ret < 0) ? rdma_seterrno(ret) : ret;
}
#ifdef __cplusplus
}
#endif
#endif /* RDMA_CMA_H */
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