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This layer is composed of two sub-modules, backend and resource manager. Backend sub-module is responsible for all the interaction with IB layers such as ibverbs and umad (external libraries). Resource manager is a collection of functions and structures to manage RDMA resources such as QPs, CQs and MRs. Reviewed-by: Dotan Barak <dotanb@mellanox.com> Reviewed-by: Zhu Yanjun <yanjun.zhu@oracle.com> Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
99 lines
3.7 KiB
C
99 lines
3.7 KiB
C
/*
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* RDMA device: Definitions of Backend Device functions
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*
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* Copyright (C) 2018 Oracle
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* Copyright (C) 2018 Red Hat Inc
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*
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* Authors:
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* Yuval Shaia <yuval.shaia@oracle.com>
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* Marcel Apfelbaum <marcel@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef RDMA_BACKEND_H
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#define RDMA_BACKEND_H
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#include <qapi/error.h>
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#include "rdma_rm_defs.h"
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#include "rdma_backend_defs.h"
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/* Add definition for QP0 and QP1 as there is no userspace enums for them */
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enum ibv_special_qp_type {
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IBV_QPT_SMI = 0,
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IBV_QPT_GSI = 1,
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};
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static inline union ibv_gid *rdma_backend_gid(RdmaBackendDev *dev)
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{
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return &dev->gid;
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}
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static inline uint32_t rdma_backend_qpn(const RdmaBackendQP *qp)
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{
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return qp->ibqp ? qp->ibqp->qp_num : 0;
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}
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static inline uint32_t rdma_backend_mr_lkey(const RdmaBackendMR *mr)
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{
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return mr->ibmr ? mr->ibmr->lkey : 0;
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}
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static inline uint32_t rdma_backend_mr_rkey(const RdmaBackendMR *mr)
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{
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return mr->ibmr ? mr->ibmr->rkey : 0;
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}
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int rdma_backend_init(RdmaBackendDev *backend_dev,
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RdmaDeviceResources *rdma_dev_res,
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const char *backend_device_name, uint8_t port_num,
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uint8_t backend_gid_idx, struct ibv_device_attr *dev_attr,
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Error **errp);
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void rdma_backend_fini(RdmaBackendDev *backend_dev);
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void rdma_backend_register_comp_handler(void (*handler)(int status,
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unsigned int vendor_err, void *ctx));
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void rdma_backend_unregister_comp_handler(void);
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int rdma_backend_query_port(RdmaBackendDev *backend_dev,
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struct ibv_port_attr *port_attr);
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int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd);
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void rdma_backend_destroy_pd(RdmaBackendPD *pd);
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int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, uint64_t addr,
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size_t length, int access);
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void rdma_backend_destroy_mr(RdmaBackendMR *mr);
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int rdma_backend_create_cq(RdmaBackendDev *backend_dev, RdmaBackendCQ *cq,
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int cqe);
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void rdma_backend_destroy_cq(RdmaBackendCQ *cq);
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void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq);
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int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t qp_type,
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RdmaBackendPD *pd, RdmaBackendCQ *scq,
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RdmaBackendCQ *rcq, uint32_t max_send_wr,
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uint32_t max_recv_wr, uint32_t max_send_sge,
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uint32_t max_recv_sge);
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int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
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uint8_t qp_type, uint32_t qkey);
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int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
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uint8_t qp_type, union ibv_gid *dgid,
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uint32_t dqpn, uint32_t rq_psn, uint32_t qkey,
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bool use_qkey);
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int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t qp_type,
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uint32_t sq_psn, uint32_t qkey, bool use_qkey);
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void rdma_backend_destroy_qp(RdmaBackendQP *qp);
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void rdma_backend_post_send(RdmaBackendDev *backend_dev,
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RdmaBackendQP *qp, uint8_t qp_type,
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struct ibv_sge *sge, uint32_t num_sge,
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union ibv_gid *dgid, uint32_t dqpn, uint32_t dqkey,
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void *ctx);
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void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
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RdmaDeviceResources *rdma_dev_res,
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RdmaBackendQP *qp, uint8_t qp_type,
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struct ibv_sge *sge, uint32_t num_sge, void *ctx);
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#endif
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