LXR linux/drivers/infiniband/sw/rxe/rxe

   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
  37int 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("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("invalid sgid index = %d\n",
  51                                attr->grh.sgid_index);
  52                        return -EINVAL;
  53                }
  54        }
  55
  56        return 0;
  57}
  58
  59int 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
  68int 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
  76int 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
  89struct 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}
  99