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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
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
38enum ibv_special_qp_type {
39 IBV_QPT_SMI = 0,
40 IBV_QPT_GSI = 1,
41};
42
43static inline uint32_t rdma_backend_qpn(const RdmaBackendQP *qp)
44{
45 return qp->ibqp ? qp->ibqp->qp_num : 1;
46}
47
48static inline uint32_t rdma_backend_mr_lkey(const RdmaBackendMR *mr)
49{
50 return mr->ibmr ? mr->ibmr->lkey : 0;
51}
52
53static inline uint32_t rdma_backend_mr_rkey(const RdmaBackendMR *mr)
54{
55 return mr->ibmr ? mr->ibmr->rkey : 0;
56}
57
58int 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);
63void rdma_backend_fini(RdmaBackendDev *backend_dev);
64int rdma_backend_add_gid(RdmaBackendDev *backend_dev, const char *ifname,
65 union ibv_gid *gid);
66int rdma_backend_del_gid(RdmaBackendDev *backend_dev, const char *ifname,
67 union ibv_gid *gid);
68int rdma_backend_get_gid_index(RdmaBackendDev *backend_dev,
69 union ibv_gid *gid);
70void rdma_backend_start(RdmaBackendDev *backend_dev);
71void rdma_backend_stop(RdmaBackendDev *backend_dev);
72void rdma_backend_register_comp_handler(void (*handler)(void *ctx,
73 struct ibv_wc *wc));
74void rdma_backend_unregister_comp_handler(void);
75
76int rdma_backend_query_port(RdmaBackendDev *backend_dev,
77 struct ibv_port_attr *port_attr);
78int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd);
79void rdma_backend_destroy_pd(RdmaBackendPD *pd);
80
81int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, void *addr,
82 size_t length, uint64_t guest_start, int access);
83void rdma_backend_destroy_mr(RdmaBackendMR *mr);
84
85int rdma_backend_create_cq(RdmaBackendDev *backend_dev, RdmaBackendCQ *cq,
86 int cqe);
87void rdma_backend_destroy_cq(RdmaBackendCQ *cq);
88void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq);
89
90int 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);
95int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
96 uint8_t qp_type, uint32_t qkey);
97int 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);
101int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t qp_type,
102 uint32_t sq_psn, uint32_t qkey, bool use_qkey);
103int rdma_backend_query_qp(RdmaBackendQP *qp, struct ibv_qp_attr *attr,
104 int attr_mask, struct ibv_qp_init_attr *init_attr);
105void rdma_backend_destroy_qp(RdmaBackendQP *qp, RdmaDeviceResources *dev_res);
106
107void 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);
113void 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
117int rdma_backend_create_srq(RdmaBackendSRQ *srq, RdmaBackendPD *pd,
118 uint32_t max_wr, uint32_t max_sge,
119 uint32_t srq_limit);
120int rdma_backend_query_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr);
121int rdma_backend_modify_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr,
122 int srq_attr_mask);
123void rdma_backend_destroy_srq(RdmaBackendSRQ *srq,
124 RdmaDeviceResources *dev_res);
125void 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
130