func (qp *queuePair) PostSendImm(imm uint32, mr *MemoryRegion) error {
if qp.qp == nil {
return errQPAlreadyClosed
}
var sendWr C.struct_ibv_send_wr
var bad *C.struct_ibv_send_wr
if imm > 0 {
sendWr.opcode = C.IBV_WR_SEND_WITH_IMM
// always send inline if there is immediate data
sendWr.send_flags = C.IBV_SEND_INLINE
sendWr.imm_data = C.uint32_t(imm)
} else {
sendWr.opcode = C.IBV_WR_SEND
sendWr.send_flags = C.IBV_SEND_SIGNALED
}
if mr != nil {
var sge C.struct_ibv_sge
sendWr.sg_list = &sge
sendWr.num_sge = 1
mr.populateSge(qp.iface.pd, &sge)
} else {
// send inline if there is no memory region to send
sendWr.send_flags = C.IBV_SEND_INLINE
}
sendWr.wr_id = C.uint64_t(uintptr(unsafe.Pointer(&sendWr)))
qp.workRequests[sendWr.wr_id] = workRequest{mr, &sendWr, nil, false}
errno := C.ibv_post_send(qp.qp, &sendWr, &bad)
return newError("ibv_post_send", errno)
}
// Zero-length RDMA write.
func (qp *queuePair) PostKeepalive() error {
if qp.qp == nil {
return errQPAlreadyClosed
}
var sendWr C.struct_ibv_send_wr
var bad *C.struct_ibv_send_wr
sendWr.opcode = C.IBV_WR_RDMA_WRITE
sendWr.send_flags = C.IBV_SEND_SIGNALED
sendWr.wr_id = C.uint64_t(uintptr(unsafe.Pointer(&sendWr)))
qp.workRequests[sendWr.wr_id] = workRequest{nil, &sendWr, nil, true}
errno := C.ibv_post_send(qp.qp, &sendWr, &bad)
return newError("ibv_post_send", errno)
}
func (qp *queuePair) PostWrite(mr *MemoryRegion, remoteAddr uint64, rkey uint32) error {
if qp.qp == nil {
return errQPAlreadyClosed
}
var sendWr C.struct_ibv_send_wr
var sge C.struct_ibv_sge
var bad *C.struct_ibv_send_wr
sendWr.opcode = C.IBV_WR_RDMA_WRITE
sendWr.send_flags = C.IBV_SEND_SIGNALED
sendWr.sg_list = &sge
sendWr.num_sge = 1
mr.populateSge(qp.iface.pd, &sge)
r := (*rdma)(unsafe.Pointer(&sendWr.wr))
r.remoteAddr = remoteAddr
r.rkey = rkey
sendWr.wr_id = C.uint64_t(uintptr(unsafe.Pointer(&sendWr)))
qp.workRequests[sendWr.wr_id] = workRequest{mr, &sendWr, nil, false}
errno := C.ibv_post_send(qp.qp, &sendWr, &bad)
return newError("ibv_post_send", errno)
}