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
  42int 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        u16 vlan_tag = 0xffff;
  50        const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
  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_tag, 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_tag < VLAN_CFI_MASK) {
  63                vlan_en = true;
  64                vlan_tag |= (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 = vlan_tag;
  72        ah->av.vlan_en = vlan_en;
  73        dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
  74                ah->av.vlan);
  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
  85int 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
 101void hns_roce_destroy_ah(struct ib_ah *ah, u32 flags)
 102{
 103        return;
 104}
 105