LXR linux/drivers/infiniband/hw/hns/hns_roce

   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
  42struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd,
  43                                 struct rdma_ah_attr *ah_attr,
  44                                 struct ib_udata *udata)
  45{
  46        struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
  47        struct device *dev = &hr_dev->pdev->dev;
  48        struct ib_gid_attr gid_attr;
  49        struct hns_roce_ah *ah;
  50        u16 vlan_tag = 0xffff;
  51        struct in6_addr in6;
  52        const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
  53        union ib_gid sgid;
  54        int ret;
  55
  56        ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
  57        if (!ah)
  58                return ERR_PTR(-ENOMEM);
  59
  60        /* Get mac address */
  61        memcpy(&in6, grh->dgid.raw, sizeof(grh->dgid.raw));
  62        if (rdma_is_multicast_addr(&in6)) {
  63                rdma_get_mcast_mac(&in6, ah->av.mac);
  64        } else {
  65                u8 *dmac = rdma_ah_retrieve_dmac(ah_attr);
  66
  67                if (!dmac) {
  68                        kfree(ah);
  69                        return ERR_PTR(-EINVAL);
  70                }
  71                memcpy(ah->av.mac, dmac, ETH_ALEN);
  72        }
  73
  74        /* Get source gid */
  75        ret = ib_get_cached_gid(ibpd->device, rdma_ah_get_port_num(ah_attr),
  76                                grh->sgid_index, &sgid, &gid_attr);
  77        if (ret) {
  78                dev_err(dev, "get sgid failed! ret = %d\n", ret);
  79                kfree(ah);
  80                return ERR_PTR(ret);
  81        }
  82
  83        if (gid_attr.ndev) {
  84                if (is_vlan_dev(gid_attr.ndev))
  85                        vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
  86                dev_put(gid_attr.ndev);
  87        }
  88
  89        if (vlan_tag < 0x1000)
  90                vlan_tag |= (rdma_ah_get_sl(ah_attr) &
  91                             HNS_ROCE_VLAN_SL_BIT_MASK) <<
  92                             HNS_ROCE_VLAN_SL_SHIFT;
  93
  94        ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn |
  95                                     (rdma_ah_get_port_num(ah_attr) <<
  96                                     HNS_ROCE_PORT_NUM_SHIFT));
  97        ah->av.gid_index = grh->sgid_index;
  98        ah->av.vlan = cpu_to_le16(vlan_tag);
  99        dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
 100                ah->av.vlan);
 101
 102        if (rdma_ah_get_static_rate(ah_attr))
 103                ah->av.stat_rate = IB_RATE_10_GBPS;
 104
 105        memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
 106        ah->av.sl_tclass_flowlabel = cpu_to_le32(rdma_ah_get_sl(ah_attr) <<
 107                                                 HNS_ROCE_SL_SHIFT);
 108
 109        return &ah->ibah;
 110}
 111
 112int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
 113{
 114        struct hns_roce_ah *ah = to_hr_ah(ibah);
 115
 116        memset(ah_attr, 0, sizeof(*ah_attr));
 117
 118        rdma_ah_set_sl(ah_attr, (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
 119                                 HNS_ROCE_SL_SHIFT));
 120        rdma_ah_set_port_num(ah_attr, (le32_to_cpu(ah->av.port_pd) >>
 121                                       HNS_ROCE_PORT_NUM_SHIFT));
 122        rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
 123        rdma_ah_set_grh(ah_attr, NULL,
 124                        (le32_to_cpu(ah->av.sl_tclass_flowlabel) &
 125                         HNS_ROCE_FLOW_LABLE_MASK), ah->av.gid_index,
 126                        ah->av.hop_limit,
 127                        (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
 128                         HNS_ROCE_TCLASS_SHIFT));
 129        rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
 130
 131        return 0;
 132}
 133
 134int hns_roce_destroy_ah(struct ib_ah *ah)
 135{
 136        kfree(to_hr_ah(ah));
 137
 138        return 0;
 139}
 140