LXR qemu/hw/rdma/rdma

   1/*
   2 *  RDMA device: Definitions of Backend Device functions
   3 *
   4 * Copyright (C) 2018 Oracle
   5 * Copyright (C) 2018 Red Hat Inc
   6 *
   7 * Authors:
   8 *     Yuval Shaia <yuval.shaia@oracle.com>
   9 *     Marcel Apfelbaum <marcel@redhat.com>
  10 *
  11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12 * See the COPYING file in the top-level directory.
  13 *
  14 */
  15
  16#ifndef RDMA_BACKEND_H
  17#define RDMA_BACKEND_H
  18
  19#include "qapi/error.h"
  20#include "rdma_rm_defs.h"
  21#include "rdma_backend_defs.h"
  22
  23/* Add definition for QP0 and QP1 as there is no userspace enums for them */
  24enum ibv_special_qp_type {
  25    IBV_QPT_SMI = 0,
  26    IBV_QPT_GSI = 1,
  27};
  28
  29static inline union ibv_gid *rdma_backend_gid(RdmaBackendDev *dev)
  30{
  31    return &dev->gid;
  32}
  33
  34static inline uint32_t rdma_backend_qpn(const RdmaBackendQP *qp)
  35{
  36    return qp->ibqp ? qp->ibqp->qp_num : 0;
  37}
  38
  39static inline uint32_t rdma_backend_mr_lkey(const RdmaBackendMR *mr)
  40{
  41    return mr->ibmr ? mr->ibmr->lkey : 0;
  42}
  43
  44static inline uint32_t rdma_backend_mr_rkey(const RdmaBackendMR *mr)
  45{
  46    return mr->ibmr ? mr->ibmr->rkey : 0;
  47}
  48
  49int rdma_backend_init(RdmaBackendDev *backend_dev, PCIDevice *pdev,
  50                      RdmaDeviceResources *rdma_dev_res,
  51                      const char *backend_device_name, uint8_t port_num,
  52                      uint8_t backend_gid_idx, struct ibv_device_attr *dev_attr,
  53                      Error **errp);
  54void rdma_backend_fini(RdmaBackendDev *backend_dev);
  55void rdma_backend_start(RdmaBackendDev *backend_dev);
  56void rdma_backend_stop(RdmaBackendDev *backend_dev);
  57void rdma_backend_register_comp_handler(void (*handler)(int status,
  58                                        unsigned int vendor_err, void *ctx));
  59void rdma_backend_unregister_comp_handler(void);
  60
  61int rdma_backend_query_port(RdmaBackendDev *backend_dev,
  62                            struct ibv_port_attr *port_attr);
  63int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd);
  64void rdma_backend_destroy_pd(RdmaBackendPD *pd);
  65
  66int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, void *addr,
  67                           size_t length, int access);
  68void rdma_backend_destroy_mr(RdmaBackendMR *mr);
  69
  70int rdma_backend_create_cq(RdmaBackendDev *backend_dev, RdmaBackendCQ *cq,
  71                           int cqe);
  72void rdma_backend_destroy_cq(RdmaBackendCQ *cq);
  73void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq);
  74
  75int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t qp_type,
  76                           RdmaBackendPD *pd, RdmaBackendCQ *scq,
  77                           RdmaBackendCQ *rcq, uint32_t max_send_wr,
  78                           uint32_t max_recv_wr, uint32_t max_send_sge,
  79                           uint32_t max_recv_sge);
  80int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
  81                               uint8_t qp_type, uint32_t qkey);
  82int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
  83                              uint8_t qp_type, union ibv_gid *dgid,
  84                              uint32_t dqpn, uint32_t rq_psn, uint32_t qkey,
  85                              bool use_qkey);
  86int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t qp_type,
  87                              uint32_t sq_psn, uint32_t qkey, bool use_qkey);
  88int rdma_backend_query_qp(RdmaBackendQP *qp, struct ibv_qp_attr *attr,
  89                          int attr_mask, struct ibv_qp_init_attr *init_attr);
  90void rdma_backend_destroy_qp(RdmaBackendQP *qp);
  91
  92void rdma_backend_post_send(RdmaBackendDev *backend_dev,
  93                            RdmaBackendQP *qp, uint8_t qp_type,
  94                            struct ibv_sge *sge, uint32_t num_sge,
  95                            union ibv_gid *dgid, uint32_t dqpn, uint32_t dqkey,
  96                            void *ctx);
  97void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
  98                            RdmaDeviceResources *rdma_dev_res,
  99                            RdmaBackendQP *qp, uint8_t qp_type,
 100                            struct ibv_sge *sge, uint32_t num_sge, void *ctx);
 101
 102#endif
 103