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IB/hfi1: Enable TID RDMA WRITE protocol

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This patch enables TID RDMA WRITE protocol by converting a qualified
RDMA WRITE request into a TID RDMA WRITE request internally:
(1) The TID RDMA cability must be enabled;
(2) The request must start on a 4K page boundary;
(3) The request length must be a multiple of 4K and must be larger or
equal to 256K.

Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@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 21:51:59 -08:00
committed by Doug Ledford
parent c6c231175c
commit ad00889e7c
2 changed files with 24 additions and 1 deletions
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22
drivers/infiniband/hw/hfi1/tid_rdma.c
View File

@@ -3322,6 +3322,18 @@ void setup_tid_rdma_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe)
new_opcode = IB_WR_TID_RDMA_READ; new_opcode = IB_WR_TID_RDMA_READ;
do_tid_rdma = true; do_tid_rdma = true;
} }
} else if (wqe->wr.opcode == IB_WR_RDMA_WRITE) {
/*
* TID RDMA is enabled for this RDMA WRITE request iff:
* 1. The remote address is page-aligned,
* 2. The length is larger than the minimum segment size,
* 3. The length is page-multiple.
*/
if (!(wqe->rdma_wr.remote_addr & ~PAGE_MASK) &&
!(wqe->length & ~PAGE_MASK)) {
new_opcode = IB_WR_TID_RDMA_WRITE;
do_tid_rdma = true;
}
} }
if (do_tid_rdma) { if (do_tid_rdma) {
@@ -3338,12 +3350,22 @@ void setup_tid_rdma_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe)
priv->tid_req.n_flows = remote->max_read; priv->tid_req.n_flows = remote->max_read;
qpriv->tid_r_reqs++; qpriv->tid_r_reqs++;
wqe->lpsn += rvt_div_round_up_mtu(qp, wqe->length) - 1; wqe->lpsn += rvt_div_round_up_mtu(qp, wqe->length) - 1;
} else {
wqe->lpsn += priv->tid_req.total_segs - 1;
atomic_inc(&qpriv->n_requests);
} }
priv->tid_req.cur_seg = 0; priv->tid_req.cur_seg = 0;
priv->tid_req.comp_seg = 0; priv->tid_req.comp_seg = 0;
priv->tid_req.ack_seg = 0; priv->tid_req.ack_seg = 0;
priv->tid_req.state = TID_REQUEST_INACTIVE; priv->tid_req.state = TID_REQUEST_INACTIVE;
/*
* Reset acked_tail.
* TID RDMA READ does not have ACKs so it does not
* update the pointer. We have to reset it so TID RDMA
* WRITE does not get confused.
*/
priv->tid_req.acked_tail = priv->tid_req.setup_head;
trace_hfi1_tid_req_setup_tid_wqe(qp, 1, wqe->wr.opcode, trace_hfi1_tid_req_setup_tid_wqe(qp, 1, wqe->wr.opcode,
wqe->psn, wqe->lpsn, wqe->psn, wqe->lpsn,
&priv->tid_req); &priv->tid_req);

3
drivers/infiniband/hw/hfi1/tid_rdma.h
View File

@@ -266,7 +266,8 @@ static inline void hfi1_setup_tid_rdma_wqe(struct rvt_qp *qp,
struct rvt_swqe *wqe) struct rvt_swqe *wqe)
{ {
if (wqe->priv && if (wqe->priv &&
wqe->wr.opcode == IB_WR_RDMA_READ && (wqe->wr.opcode == IB_WR_RDMA_READ ||
wqe->wr.opcode == IB_WR_RDMA_WRITE) &&
wqe->length >= TID_RDMA_MIN_SEGMENT_SIZE) wqe->length >= TID_RDMA_MIN_SEGMENT_SIZE)
setup_tid_rdma_wqe(qp, wqe); setup_tid_rdma_wqe(qp, wqe);
} }