drivers/infiniband/sw/rxe/rxe_av.c

   1 /*
   2  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   3  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *         Redistribution and use in source and binary forms, with or
  12  *         without modification, are permitted provided that the following
  13  *         conditions are met:
  14  *
  15  *              - Redistributions of source code must retain the above
  16  *                copyright notice, this list of conditions and the following
  17  *                disclaimer.
  18  *
  19  *              - Redistributions in binary form must reproduce the above
  20  *                copyright notice, this list of conditions and the following
  21  *                disclaimer in the documentation and/or other materials
  22  *                provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include "rxe.h"
  35 #include "rxe_loc.h"
  36
  37 int rxe_av_chk_attr(struct rxe_dev *rxe, struct ib_ah_attr *attr)
  38 {
  39         struct rxe_port *port;
  40
  41         if (attr->port_num != 1) {
  42                 pr_info("rxe: invalid port_num = %d\n", attr->port_num);
  43                 return -EINVAL;
  44         }
  45
  46         port = &rxe->port;
  47
  48         if (attr->ah_flags & IB_AH_GRH) {
  49                 if (attr->grh.sgid_index > port->attr.gid_tbl_len) {
  50                         pr_info("rxe: invalid sgid index = %d\n",
  51                                 attr->grh.sgid_index);
  52                         return -EINVAL;
  53                 }
  54         }
  55
  56         return 0;
  57 }
  58
  59 int rxe_av_from_attr(struct rxe_dev *rxe, u8 port_num,
  60                      struct rxe_av *av, struct ib_ah_attr *attr)
  61 {
  62         memset(av, 0, sizeof(*av));
  63         memcpy(&av->grh, &attr->grh, sizeof(attr->grh));
  64         av->port_num = port_num;
  65         return 0;
  66 }
  67
  68 int rxe_av_to_attr(struct rxe_dev *rxe, struct rxe_av *av,
  69                    struct ib_ah_attr *attr)
  70 {
  71         memcpy(&attr->grh, &av->grh, sizeof(av->grh));
  72         attr->port_num = av->port_num;
  73         return 0;
  74 }
  75
  76 int rxe_av_fill_ip_info(struct rxe_dev *rxe,
  77                         struct rxe_av *av,
  78                         struct ib_ah_attr *attr,
  79                         struct ib_gid_attr *sgid_attr,
  80                         union ib_gid *sgid)
  81 {
  82         rdma_gid2ip(&av->sgid_addr._sockaddr, sgid);
  83         rdma_gid2ip(&av->dgid_addr._sockaddr, &attr->grh.dgid);
  84         av->network_type = ib_gid_to_network_type(sgid_attr->gid_type, sgid);
  85
  86         return 0;
  87 }
  88
  89 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt)
  90 {
  91         if (!pkt || !pkt->qp)
  92                 return NULL;
  93
  94         if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC)
  95                 return &pkt->qp->pri_av;
  96
  97         return (pkt->wqe) ? &pkt->wqe->av : NULL;
  98 }