drivers/infiniband/sw/rxe/rxe_av.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   4  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   5  */
   6
   7 #include "rxe.h"
   8 #include "rxe_loc.h"
   9
  10 void rxe_init_av(struct rdma_ah_attr *attr, struct rxe_av *av)
  11 {
  12         rxe_av_from_attr(rdma_ah_get_port_num(attr), av, attr);
  13         rxe_av_fill_ip_info(av, attr);
  14         memcpy(av->dmac, attr->roce.dmac, ETH_ALEN);
  15 }
  16
  17 int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr)
  18 {
  19         const struct ib_global_route *grh = rdma_ah_read_grh(attr);
  20         struct rxe_port *port;
  21         int type;
  22
  23         port = &rxe->port;
  24
  25         if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) {
  26                 if (grh->sgid_index > port->attr.gid_tbl_len) {
  27                         pr_warn("invalid sgid index = %d\n",
  28                                         grh->sgid_index);
  29                         return -EINVAL;
  30                 }
  31
  32                 type = rdma_gid_attr_network_type(grh->sgid_attr);
  33                 if (type < RDMA_NETWORK_IPV4 ||
  34                     type > RDMA_NETWORK_IPV6) {
  35                         pr_warn("invalid network type for rdma_rxe = %d\n",
  36                                         type);
  37                         return -EINVAL;
  38                 }
  39         }
  40
  41         return 0;
  42 }
  43
  44 void rxe_av_from_attr(u8 port_num, struct rxe_av *av,
  45                      struct rdma_ah_attr *attr)
  46 {
  47         const struct ib_global_route *grh = rdma_ah_read_grh(attr);
  48
  49         memset(av, 0, sizeof(*av));
  50         memcpy(av->grh.dgid.raw, grh->dgid.raw, sizeof(grh->dgid.raw));
  51         av->grh.flow_label = grh->flow_label;
  52         av->grh.sgid_index = grh->sgid_index;
  53         av->grh.hop_limit = grh->hop_limit;
  54         av->grh.traffic_class = grh->traffic_class;
  55         av->port_num = port_num;
  56 }
  57
  58 void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr)
  59 {
  60         struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
  61
  62         attr->type = RDMA_AH_ATTR_TYPE_ROCE;
  63
  64         memcpy(grh->dgid.raw, av->grh.dgid.raw, sizeof(av->grh.dgid.raw));
  65         grh->flow_label = av->grh.flow_label;
  66         grh->sgid_index = av->grh.sgid_index;
  67         grh->hop_limit = av->grh.hop_limit;
  68         grh->traffic_class = av->grh.traffic_class;
  69
  70         rdma_ah_set_ah_flags(attr, IB_AH_GRH);
  71         rdma_ah_set_port_num(attr, av->port_num);
  72 }
  73
  74 void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr)
  75 {
  76         const struct ib_gid_attr *sgid_attr = attr->grh.sgid_attr;
  77         int ibtype;
  78         int type;
  79
  80         rdma_gid2ip((struct sockaddr *)&av->sgid_addr, &sgid_attr->gid);
  81         rdma_gid2ip((struct sockaddr *)&av->dgid_addr,
  82                     &rdma_ah_read_grh(attr)->dgid);
  83
  84         ibtype = rdma_gid_attr_network_type(sgid_attr);
  85
  86         switch (ibtype) {
  87         case RDMA_NETWORK_IPV4:
  88                 type = RXE_NETWORK_TYPE_IPV4;
  89                 break;
  90         case RDMA_NETWORK_IPV6:
  91                 type = RXE_NETWORK_TYPE_IPV4;
  92                 break;
  93         default:
  94                 /* not reached - checked in rxe_av_chk_attr */
  95                 type = 0;
  96                 break;
  97         }
  98
  99         av->network_type = type;
 100 }
 101
 102 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt)
 103 {
 104         if (!pkt || !pkt->qp)
 105                 return NULL;
 106
 107         if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC)
 108                 return &pkt->qp->pri_av;
 109
 110         return (pkt->wqe) ? &pkt->wqe->av : NULL;
 111 }