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IB/hfi1: Add a function to build TID RDMA RESYNC packet

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This patch adds a function to build TID RDMA RESYNC packet, which is
sent by the requester to notify the responder that no TID RDMA ACK
packet has been received for a given KDETH PSN.

Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Kaike Wan 2019-01-23 21:50:36 -08:00 committed by Doug Ledford
parent 829eaee5d0
commit 6e391c6a4a
2 changed files with 30 additions and 0 deletions
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26
drivers/infiniband/hw/hfi1/tid_rdma.c
View File

@ -4623,3 +4623,29 @@ static void hfi1_tid_retry_timeout(struct timer_list *t)
spin_unlock(&qp->s_lock);
spin_unlock_irqrestore(&qp->r_lock, flags);
}
u32 hfi1_build_tid_rdma_resync(struct rvt_qp *qp, struct rvt_swqe *wqe,
struct ib_other_headers *ohdr, u32 *bth1,
u32 *bth2, u16 fidx)
{
struct hfi1_qp_priv *qpriv = qp->priv;
struct tid_rdma_params *remote;
struct tid_rdma_request *req = wqe_to_tid_req(wqe);
struct tid_rdma_flow *flow = &req->flows[fidx];
u32 generation;
rcu_read_lock();
remote = rcu_dereference(qpriv->tid_rdma.remote);
KDETH_RESET(ohdr->u.tid_rdma.ack.kdeth1, JKEY, remote->jkey);
ohdr->u.tid_rdma.ack.verbs_qp = cpu_to_be32(qp->remote_qpn);
*bth1 = remote->qp;
rcu_read_unlock();
generation = kern_flow_generation_next(flow->flow_state.generation);
*bth2 = mask_psn((generation << HFI1_KDETH_BTH_SEQ_SHIFT) - 1);
qpriv->s_resync_psn = *bth2;
*bth2 |= IB_BTH_REQ_ACK;
KDETH_RESET(ohdr->u.tid_rdma.ack.kdeth0, KVER, 0x1);
return sizeof(ohdr->u.tid_rdma.resync) / sizeof(u32);
}

4
drivers/infiniband/hw/hfi1/tid_rdma.h
View File

@ -292,4 +292,8 @@ void hfi1_rc_rcv_tid_rdma_ack(struct hfi1_packet *packet);
void hfi1_add_tid_retry_timer(struct rvt_qp *qp);
void hfi1_del_tid_retry_timer(struct rvt_qp *qp);
u32 hfi1_build_tid_rdma_resync(struct rvt_qp *qp, struct rvt_swqe *wqe,
struct ib_other_headers *ohdr, u32 *bth1,
u32 *bth2, u16 fidx);
#endif /* HFI1_TID_RDMA_H */