diff options
| author | Michael J. Ruhl <michael.j.ruhl@intel.com> | 2018-09-10 19:49:27 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-09-11 18:55:02 +0300 |
| commit | 0b79b27748cbec221e1ceabf63578198602bf01d (patch) | |
| tree | a62ba4181d233bc314b46b3d12f62fe68e34d5b4 /drivers/infiniband/hw/hfi1/qp.c | |
| parent | 3e5d60bcc8a42bfd0c888a0cf52a5a7e8398677d (diff) | |
| download | linux-0b79b27748cbec221e1ceabf63578198602bf01d.tar.xz | |
IB/{hfi1, qib, rdmavt}: Schedule multi RC/UC packets instead of posting
The post_send() path determines if it should post directly or, schedule
the post for later. The current logic is:
if the swqe ring is empty or (for hfi1) wqe->length <= piothreshold
post the send
else
schedule
This can allow large requests to call the send engine directly. Large
requests can potentially produce a large number of packets prior to
returning to the caller, blocking the caller from posting more requests,
and allowing better parallel processing.
Allow the driver(s) more say in this logic (pass call_send to the driver,
rather than examining a return value).
Update hfi1/qib logic to schedule the send engine if an RC or UC message
is larger than the QP MTU size.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/qp.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/qp.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/hfi1/qp.c b/drivers/infiniband/hw/hfi1/qp.c index 9b1e84a6b1cc..54d9ff171059 100644 --- a/drivers/infiniband/hw/hfi1/qp.c +++ b/drivers/infiniband/hw/hfi1/qp.c @@ -285,17 +285,13 @@ void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, * hfi1_check_send_wqe - validate wqe * @qp - The qp * @wqe - The built wqe - * - * validate wqe. This is called - * prior to inserting the wqe into - * the ring but after the wqe has been - * setup. + * @call_send - Determine if the send should be posted or scheduled. * * Returns 0 on success, -EINVAL on failure * */ int hfi1_check_send_wqe(struct rvt_qp *qp, - struct rvt_swqe *wqe) + struct rvt_swqe *wqe, bool *call_send) { struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); struct rvt_ah *ah; @@ -305,6 +301,8 @@ int hfi1_check_send_wqe(struct rvt_qp *qp, case IB_QPT_UC: if (wqe->length > 0x80000000U) return -EINVAL; + if (wqe->length > qp->pmtu) + *call_send = false; break; case IB_QPT_SMI: ah = ibah_to_rvtah(wqe->ud_wr.ah); @@ -321,7 +319,7 @@ int hfi1_check_send_wqe(struct rvt_qp *qp, default: break; } - return wqe->length <= piothreshold; + return 0; } /** |