text: /*
   * Copyright (c) 2016 Hisilicon Limited.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * OpenIB.org BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #include <linux/platform_device.h>
  #include <rdma/ib_addr.h>
  #include <rdma/ib_cache.h>
  #include "hns_roce_device.h"
  
  #define HNS_ROCE_PORT_NUM_SHIFT		24
  #define HNS_ROCE_VLAN_SL_BIT_MASK	7
  #define HNS_ROCE_VLAN_SL_SHIFT		13
  
  int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr,
  		       u32 flags, struct ib_udata *udata)
  {
  	struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
  	const struct ib_gid_attr *gid_attr;
  	struct device *dev = hr_dev->dev;
  	struct hns_roce_ah *ah = to_hr_ah(ibah);
  	u16 vlan_tag = 0xffff;
  	const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
  	bool vlan_en = false;
  	int ret;
  
  	gid_attr = ah_attr->grh.sgid_attr;
  	ret = rdma_read_gid_l2_fields(gid_attr, &vlan_tag, NULL);
  	if (ret)
  		return ret;
  
  	/* Get mac address */
  	memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
  
  	if (vlan_tag < VLAN_CFI_MASK) {
  		vlan_en = true;
  		vlan_tag |= (rdma_ah_get_sl(ah_attr) &
  			     HNS_ROCE_VLAN_SL_BIT_MASK) <<
  			     HNS_ROCE_VLAN_SL_SHIFT;
  	}
  
  	ah->av.port_pd = cpu_to_le32(to_hr_pd(ibah->pd)->pdn |
  				     (rdma_ah_get_port_num(ah_attr) <<
  				     HNS_ROCE_PORT_NUM_SHIFT));
  	ah->av.gid_index = grh->sgid_index;
  	ah->av.vlan = cpu_to_le16(vlan_tag);
  	ah->av.vlan_en = vlan_en;
  	dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
  		ah->av.vlan);
  
  	if (rdma_ah_get_static_rate(ah_attr))
  		ah->av.stat_rate = IB_RATE_10_GBPS;
  
  	memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
  	ah->av.sl_tclass_flowlabel = cpu_to_le32(rdma_ah_get_sl(ah_attr) <<
  						 HNS_ROCE_SL_SHIFT);
  
  	return 0;
  }
  
  int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
  {
  	struct hns_roce_ah *ah = to_hr_ah(ibah);
  
  	memset(ah_attr, 0, sizeof(*ah_attr));
  
  	rdma_ah_set_sl(ah_attr, (le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
  				 HNS_ROCE_SL_SHIFT));
  	rdma_ah_set_port_num(ah_attr, (le32_to_cpu(ah->av.port_pd) >>
  				       HNS_ROCE_PORT_NUM_SHIFT));
  	rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
  	rdma_ah_set_grh(ah_attr, NULL,
  			(le32_to_cpu(ah->av.sl_tclass_flowlabel) &
  			 HNS_ROCE_FLOW_LABEL_MASK), ah->av.gid_index,
  			ah->av.hop_limit,
  			(le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
  			 HNS_ROCE_TCLASS_SHIFT));
  	rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
  
  	return 0;
  }
  
  void hns_roce_destroy_ah(struct ib_ah *ah, u32 flags)
  {
  	return;
  }
  