Commit 6e391c6a authored by Kaike Wan's avatar Kaike Wan Committed by Doug Ledford
Browse files

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



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: default avatarMitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarAshutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: default avatarKaike Wan <kaike.wan@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 829eaee5

drivers/infiniband/hw/hfi1/tid_rdma.c

+26 −0
Original line number Diff line number Diff line
@@ -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);

}

drivers/infiniband/hw/hfi1/tid_rdma.h

+4 −0
Original line number Diff line number Diff line
@@ -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 */

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