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nvmf/rdma: Separate cmd wr from rsp wr

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This allows static initialization of the scatter
gather list as well as future optimizations
around pipelining commands with data.

Change-Id: I8af8f3e3425610bc720677c9bc84f163cfb6278a
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
This commit is contained in:
Ziye Yang 2017-02-27 09:32:00 +08:00 committed by Ben Walker
parent b4ed77ef0d
commit 4e74233835
1 changed files with 24 additions and 11 deletions
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29
lib/nvmf/rdma.c
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@ -77,6 +77,11 @@ struct spdk_nvmf_rdma_request {
} wr;
struct ibv_sge sg_list[2];
struct {
struct ibv_send_wr wr;
struct ibv_sge sgl[NVMF_DEFAULT_TX_SGE];
} rsp;
TAILQ_ENTRY(spdk_nvmf_rdma_request) link;
};
@ -322,7 +327,6 @@ spdk_nvmf_rdma_conn_create(struct rdma_cm_id *id, struct ibv_comp_channel *chann
rdma_req = &rdma_conn->reqs[i];
rdma_req->buf = (void *)((uintptr_t)rdma_conn->bufs + (i * g_rdma.in_capsule_data_size));
rdma_req->req.cmd = &rdma_conn->cmds[i];
rdma_req->req.rsp = &rdma_conn->cpls[i];
rdma_req->req.conn = &rdma_conn->conn;
if (nvmf_post_rdma_recv(&rdma_req->req)) {
@ -330,6 +334,20 @@ spdk_nvmf_rdma_conn_create(struct rdma_cm_id *id, struct ibv_comp_channel *chann
spdk_nvmf_rdma_conn_destroy(rdma_conn);
return NULL;
}
/* Set up memory to send responses */
rdma_req->req.rsp = &rdma_conn->cpls[i];
rdma_req->rsp.sgl[0].addr = (uintptr_t)&rdma_conn->cpls[i];
rdma_req->rsp.sgl[0].length = sizeof(rdma_conn->cpls[i]);
rdma_req->rsp.sgl[0].lkey = rdma_conn->cpls_mr->lkey;
rdma_req->rsp.wr.wr_id = (uintptr_t)rdma_req;
rdma_req->rsp.wr.next = NULL;
rdma_req->rsp.wr.opcode = IBV_WR_SEND;
rdma_req->rsp.wr.send_flags = IBV_SEND_SIGNALED;
rdma_req->rsp.wr.sg_list = rdma_req->rsp.sgl;
rdma_req->rsp.wr.num_sge = NVMF_DEFAULT_TX_SGE;
}
return rdma_conn;
@ -493,15 +511,10 @@ nvmf_post_rdma_send(struct spdk_nvmf_request *req)
SPDK_TRACELOG(SPDK_TRACE_RDMA, "RDMA SEND POSTED. Request: %p Connection: %p\n", req, conn);
rdma_req->sg_list[0].addr = (uintptr_t)req->rsp;
rdma_req->sg_list[0].length = sizeof(*req->rsp);
rdma_req->sg_list[0].lkey = rdma_conn->cpls_mr->lkey;
nvmf_trace_ibv_sge(&rdma_req->sg_list[0]);
nvmf_ibv_send_wr_init(&rdma_req->wr.send, req, rdma_req->sg_list, IBV_WR_SEND, IBV_SEND_SIGNALED);
nvmf_trace_ibv_sge(&rdma_req->rsp.sgl[0]);
spdk_trace_record(TRACE_NVMF_IO_COMPLETE, 0, 0, (uintptr_t)req, 0);
rc = ibv_post_send(rdma_conn->cm_id->qp, &rdma_req->wr.send, &bad_wr);
rc = ibv_post_send(rdma_conn->cm_id->qp, &rdma_req->rsp.wr, &bad_wr);
if (rc) {
SPDK_ERRLOG("Failure posting rdma send for NVMf completion, rc = 0x%x\n", rc);
}