drivers/infiniband/hw/hfi1/tid_rdma.c

   1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
   2 /*
   3  * Copyright(c) 2018 Intel Corporation.
   4  *
   5  */
   6
   7 #include "hfi.h"
   8 #include "verbs.h"
   9 #include "tid_rdma.h"
  10
  11 /**
  12  * qp_to_rcd - determine the receive context used by a qp
  13  * @qp - the qp
  14  *
  15  * This routine returns the receive context associated
  16  * with a a qp's qpn.
  17  *
  18  * Returns the context.
  19  */
  20 static struct hfi1_ctxtdata *qp_to_rcd(struct rvt_dev_info *rdi,
  21                                        struct rvt_qp *qp)
  22 {
  23         struct hfi1_ibdev *verbs_dev = container_of(rdi,
  24                                                     struct hfi1_ibdev,
  25                                                     rdi);
  26         struct hfi1_devdata *dd = container_of(verbs_dev,
  27                                                struct hfi1_devdata,
  28                                                verbs_dev);
  29         unsigned int ctxt;
  30
  31         if (qp->ibqp.qp_num == 0)
  32                 ctxt = 0;
  33         else
  34                 ctxt = ((qp->ibqp.qp_num >> dd->qos_shift) %
  35                         (dd->n_krcv_queues - 1)) + 1;
  36
  37         return dd->rcd[ctxt];
  38 }
  39
  40 int hfi1_qp_priv_init(struct rvt_dev_info *rdi, struct rvt_qp *qp,
  41                       struct ib_qp_init_attr *init_attr)
  42 {
  43         struct hfi1_qp_priv *qpriv = qp->priv;
  44
  45         qpriv->rcd = qp_to_rcd(rdi, qp);
  46
  47         return 0;
  48 }