diff options
| author | Kaike Wan <kaike.wan@intel.com> | 2019-01-23 21:50:36 -0800 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2019-02-05 18:07:44 -0500 |
| commit | 6e391c6a4a8f97d34fa859c906387c05e91adbe9 (patch) | |
| tree | 674666933a1dfbfe2064f52ebdec329cfd993549 /drivers/infiniband/hw/hfi1/tid_rdma.c | |
| parent | 829eaee5d09a7500bdce9ed0bc6ec6861f8ae45b (diff) | |
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: 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>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/tid_rdma.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/tid_rdma.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/tid_rdma.c b/drivers/infiniband/hw/hfi1/tid_rdma.c index a4faf7d6c224..e10f6d714dff 100644 --- a/drivers/infiniband/hw/hfi1/tid_rdma.c +++ b/drivers/infiniband/hw/hfi1/tid_rdma.c @@ -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); +} |