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 <rdma/ib_addr.h>
  35 #include <rdma/ib_cache.h>
  36 #include "hns_roce_device.h"
  37
  38 #define HNS_ROCE_PORT_NUM_SHIFT         24
  39 #define HNS_ROCE_VLAN_SL_BIT_MASK       7
  40 #define HNS_ROCE_VLAN_SL_SHIFT          13
  41
  42 int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr,
  43                        u32 flags, struct ib_udata *udata)
  44 {
  45         struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
  46         const struct ib_gid_attr *gid_attr;
  47         struct device *dev = hr_dev->dev;
  48         struct hns_roce_ah *ah = to_hr_ah(ibah);
  49         const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
  50         u16 vlan_id = 0xffff;
  51         bool vlan_en = false;
  52         int ret;
  53
  54         gid_attr = ah_attr->grh.sgid_attr;
  55         ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL);
  56         if (ret)
  57                 return ret;
  58
  59         /* Get mac address */
  60         memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
  61
  62         if (vlan_id < VLAN_N_VID) {
  63                 vlan_en = true;
  64                 vlan_id |= (rdma_ah_get_sl(ah_attr) &
  65                              HNS_ROCE_VLAN_SL_BIT_MASK) <<
  66                              HNS_ROCE_VLAN_SL_SHIFT;
  67         }
  68
  69         ah->av.port = rdma_ah_get_port_num(ah_attr);
  70         ah->av.gid_index = grh->sgid_index;
  71         ah->av.vlan_id = vlan_id;
  72         ah->av.vlan_en = vlan_en;
  73         dev_dbg(dev, "gid_index = 0x%x,vlan_id = 0x%x\n", ah->av.gid_index,
  74                 ah->av.vlan_id);
  75
  76         if (rdma_ah_get_static_rate(ah_attr))
  77                 ah->av.stat_rate = IB_RATE_10_GBPS;
  78
  79         memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
  80         ah->av.sl = rdma_ah_get_sl(ah_attr);
  81
  82         return 0;
  83 }
  84
  85 int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
  86 {
  87         struct hns_roce_ah *ah = to_hr_ah(ibah);
  88
  89         memset(ah_attr, 0, sizeof(*ah_attr));
  90
  91         rdma_ah_set_sl(ah_attr, ah->av.sl);
  92         rdma_ah_set_port_num(ah_attr, ah->av.port);
  93         rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
  94         rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
  95                         ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
  96         rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
  97
  98         return 0;
  99 }
 100
 101 void hns_roce_destroy_ah(struct ib_ah *ah, u32 flags)
 102 {
 103         return;
 104 }