drivers/infiniband/hw/hns/hns_roce_ah.c

   1 /*
   2  * Copyright (c) 2016 Hisilicon Limited.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/platform_device.h>
  34 #include <linux/pci.h>
  35 #include <rdma/ib_addr.h>
  36 #include <rdma/ib_cache.h>
  37 #include "hns_roce_device.h"
  38
  39 static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
  40 {
  41         u32 fl = ah_attr->grh.flow_label;
  42         u16 sport;
  43
  44         if (!fl)
  45                 sport = get_random_u32() %
  46                         (IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
  47                          IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
  48                         IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
  49         else
  50                 sport = rdma_flow_label_to_udp_sport(fl);
  51
  52         return sport;
  53 }
  54
  55 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
  56                        struct ib_udata *udata)
  57 {
  58         struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
  59         const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
  60         struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
  61         struct hns_roce_ah *ah = to_hr_ah(ibah);
  62         int ret = 0;
  63
  64         if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08 && udata)
  65                 return -EOPNOTSUPP;
  66
  67         ah->av.port = rdma_ah_get_port_num(ah_attr);
  68         ah->av.gid_index = grh->sgid_index;
  69
  70         if (rdma_ah_get_static_rate(ah_attr))
  71                 ah->av.stat_rate = IB_RATE_10_GBPS;
  72
  73         ah->av.hop_limit = grh->hop_limit;
  74         ah->av.flowlabel = grh->flow_label;
  75         ah->av.udp_sport = get_ah_udp_sport(ah_attr);
  76         ah->av.sl = rdma_ah_get_sl(ah_attr);
  77         ah->av.tclass = get_tclass(grh);
  78
  79         memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
  80         memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
  81
  82         /* HIP08 needs to record vlan info in Address Vector */
  83         if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08) {
  84                 ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
  85                                               &ah->av.vlan_id, NULL);
  86                 if (ret)
  87                         return ret;
  88
  89                 ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
  90         }
  91
  92         return ret;
  93 }
  94
  95 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
  96 {
  97         struct hns_roce_ah *ah = to_hr_ah(ibah);
  98
  99         memset(ah_attr, 0, sizeof(*ah_attr));
 100
 101         rdma_ah_set_sl(ah_attr, ah->av.sl);
 102         rdma_ah_set_port_num(ah_attr, ah->av.port);
 103         rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
 104         rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
 105                         ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
 106         rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
 107
 108         return 0;
 109 }