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 rdma_ah_attr *attr)
  38 {
  39         struct rxe_port *port;
  40
  41         port = &rxe->port;
  42
  43         if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) {
  44                 u8 sgid_index = rdma_ah_read_grh(attr)->sgid_index;
  45
  46                 if (sgid_index > port->attr.gid_tbl_len) {
  47                         pr_warn("invalid sgid index = %d\n", sgid_index);
  48                         return -EINVAL;
  49                 }
  50         }
  51
  52         return 0;
  53 }
  54
  55 void rxe_av_from_attr(u8 port_num, struct rxe_av *av,
  56                      struct rdma_ah_attr *attr)
  57 {
  58         const struct ib_global_route *grh = rdma_ah_read_grh(attr);
  59
  60         memset(av, 0, sizeof(*av));
  61         memcpy(av->grh.dgid.raw, grh->dgid.raw, sizeof(grh->dgid.raw));
  62         av->grh.flow_label = grh->flow_label;
  63         av->grh.sgid_index = grh->sgid_index;
  64         av->grh.hop_limit = grh->hop_limit;
  65         av->grh.traffic_class = grh->traffic_class;
  66         av->port_num = port_num;
  67 }
  68
  69 void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr)
  70 {
  71         struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
  72
  73         attr->type = RDMA_AH_ATTR_TYPE_ROCE;
  74
  75         memcpy(grh->dgid.raw, av->grh.dgid.raw, sizeof(av->grh.dgid.raw));
  76         grh->flow_label = av->grh.flow_label;
  77         grh->sgid_index = av->grh.sgid_index;
  78         grh->hop_limit = av->grh.hop_limit;
  79         grh->traffic_class = av->grh.traffic_class;
  80
  81         rdma_ah_set_ah_flags(attr, IB_AH_GRH);
  82         rdma_ah_set_port_num(attr, av->port_num);
  83 }
  84
  85 void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr)
  86 {
  87         const struct ib_gid_attr *sgid_attr = attr->grh.sgid_attr;
  88
  89         rdma_gid2ip((struct sockaddr *)&av->sgid_addr, &sgid_attr->gid);
  90         rdma_gid2ip((struct sockaddr *)&av->dgid_addr,
  91                     &rdma_ah_read_grh(attr)->dgid);
  92         av->network_type = rdma_gid_attr_network_type(sgid_attr);
  93 }
  94
  95 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt)
  96 {
  97         if (!pkt || !pkt->qp)
  98                 return NULL;
  99
 100         if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC)
 101                 return &pkt->qp->pri_av;
 102
 103         return (pkt->wqe) ? &pkt->wqe->av : NULL;
 104 }