hw/rdma/rdma_backend.h

   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 "chardev/char-fe.h"
  21
  22 #include "rdma_rm_defs.h"
  23 #include "rdma_backend_defs.h"
  24
  25 /* Vendor Errors */
  26 #define VENDOR_ERR_FAIL_BACKEND     0x201
  27 #define VENDOR_ERR_TOO_MANY_SGES    0x202
  28 #define VENDOR_ERR_NOMEM            0x203
  29 #define VENDOR_ERR_QP0              0x204
  30 #define VENDOR_ERR_INV_NUM_SGE      0x205
  31 #define VENDOR_ERR_MAD_SEND         0x206
  32 #define VENDOR_ERR_INVLKEY          0x207
  33 #define VENDOR_ERR_MR_SMALL         0x208
  34 #define VENDOR_ERR_INV_MAD_BUFF     0x209
  35 #define VENDOR_ERR_INV_GID_IDX      0x210
  36
  37 /* Add definition for QP0 and QP1 as there is no userspace enums for them */
  38 enum ibv_special_qp_type {
  39     IBV_QPT_SMI = 0,
  40     IBV_QPT_GSI = 1,
  41 };
  42
  43 static inline uint32_t rdma_backend_qpn(const RdmaBackendQP *qp)
  44 {
  45     return qp->ibqp ? qp->ibqp->qp_num : 1;
  46 }
  47
  48 static inline uint32_t rdma_backend_mr_lkey(const RdmaBackendMR *mr)
  49 {
  50     return mr->ibmr ? mr->ibmr->lkey : 0;
  51 }
  52
  53 static inline uint32_t rdma_backend_mr_rkey(const RdmaBackendMR *mr)
  54 {
  55     return mr->ibmr ? mr->ibmr->rkey : 0;
  56 }
  57
  58 int rdma_backend_init(RdmaBackendDev *backend_dev, PCIDevice *pdev,
  59                       RdmaDeviceResources *rdma_dev_res,
  60                       const char *backend_device_name, uint8_t port_num,
  61                       struct ibv_device_attr *dev_attr,
  62                       CharBackend *mad_chr_be);
  63 void rdma_backend_fini(RdmaBackendDev *backend_dev);
  64 int rdma_backend_add_gid(RdmaBackendDev *backend_dev, const char *ifname,
  65                          union ibv_gid *gid);
  66 int rdma_backend_del_gid(RdmaBackendDev *backend_dev, const char *ifname,
  67                          union ibv_gid *gid);
  68 int rdma_backend_get_gid_index(RdmaBackendDev *backend_dev,
  69                                union ibv_gid *gid);
  70 void rdma_backend_start(RdmaBackendDev *backend_dev);
  71 void rdma_backend_stop(RdmaBackendDev *backend_dev);
  72 void rdma_backend_register_comp_handler(void (*handler)(void *ctx,
  73                                                         struct ibv_wc *wc));
  74 void rdma_backend_unregister_comp_handler(void);
  75
  76 int rdma_backend_query_port(RdmaBackendDev *backend_dev,
  77                             struct ibv_port_attr *port_attr);
  78 int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd);
  79 void rdma_backend_destroy_pd(RdmaBackendPD *pd);
  80
  81 int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, void *addr,
  82                            size_t length, uint64_t guest_start, int access);
  83 void rdma_backend_destroy_mr(RdmaBackendMR *mr);
  84
  85 int rdma_backend_create_cq(RdmaBackendDev *backend_dev, RdmaBackendCQ *cq,
  86                            int cqe);
  87 void rdma_backend_destroy_cq(RdmaBackendCQ *cq);
  88 void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq);
  89
  90 int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t qp_type,
  91                            RdmaBackendPD *pd, RdmaBackendCQ *scq,
  92                            RdmaBackendCQ *rcq, RdmaBackendSRQ *srq,
  93                            uint32_t max_send_wr, uint32_t max_recv_wr,
  94                            uint32_t max_send_sge, uint32_t max_recv_sge);
  95 int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
  96                                uint8_t qp_type, uint32_t qkey);
  97 int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
  98                               uint8_t qp_type, uint8_t sgid_idx,
  99                               union ibv_gid *dgid, uint32_t dqpn,
 100                               uint32_t rq_psn, uint32_t qkey, bool use_qkey);
 101 int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t qp_type,
 102                               uint32_t sq_psn, uint32_t qkey, bool use_qkey);
 103 int rdma_backend_query_qp(RdmaBackendQP *qp, struct ibv_qp_attr *attr,
 104                           int attr_mask, struct ibv_qp_init_attr *init_attr);
 105 void rdma_backend_destroy_qp(RdmaBackendQP *qp, RdmaDeviceResources *dev_res);
 106
 107 void rdma_backend_post_send(RdmaBackendDev *backend_dev,
 108                             RdmaBackendQP *qp, uint8_t qp_type,
 109                             struct ibv_sge *sge, uint32_t num_sge,
 110                             uint8_t sgid_idx, union ibv_gid *sgid,
 111                             union ibv_gid *dgid, uint32_t dqpn, uint32_t dqkey,
 112                             void *ctx);
 113 void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
 114                             RdmaBackendQP *qp, uint8_t qp_type,
 115                             struct ibv_sge *sge, uint32_t num_sge, void *ctx);
 116
 117 int rdma_backend_create_srq(RdmaBackendSRQ *srq, RdmaBackendPD *pd,
 118                             uint32_t max_wr, uint32_t max_sge,
 119                             uint32_t srq_limit);
 120 int rdma_backend_query_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr);
 121 int rdma_backend_modify_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr,
 122                             int srq_attr_mask);
 123 void rdma_backend_destroy_srq(RdmaBackendSRQ *srq,
 124                               RdmaDeviceResources *dev_res);
 125 void rdma_backend_post_srq_recv(RdmaBackendDev *backend_dev,
 126                                 RdmaBackendSRQ *srq, struct ibv_sge *sge,
 127                                 uint32_t num_sge, void *ctx);
 128
 129 #endif