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/*
* 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
static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
{
u32 fl = ah_attr->grh.flow_label;
u16 sport;
if (!fl)
sport = get_random_u32() %
(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
else
sport = rdma_flow_label_to_udp_sport(fl);
return sport;
}
int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
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);
struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
u16 vlan_id = 0xffff;
bool vlan_en = false;
int ret;
gid_attr = ah_attr->grh.sgid_attr;
ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL);
if (ret)
return ret;
/* Get mac address */
memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
if (vlan_id < VLAN_N_VID) {
vlan_en = true;
vlan_id |= (rdma_ah_get_sl(ah_attr) &
HNS_ROCE_VLAN_SL_BIT_MASK) <<
HNS_ROCE_VLAN_SL_SHIFT;
}
ah->av.port = rdma_ah_get_port_num(ah_attr);
ah->av.gid_index = grh->sgid_index;
ah->av.vlan_id = vlan_id;
ah->av.vlan_en = vlan_en;
dev_dbg(dev, "gid_index = 0x%x,vlan_id = 0x%x\n", ah->av.gid_index,
ah->av.vlan_id);
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 = rdma_ah_get_sl(ah_attr);
ah->av.flowlabel = grh->flow_label;
ah->av.udp_sport = get_ah_udp_sport(ah_attr);
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, ah->av.sl);
rdma_ah_set_port_num(ah_attr, ah->av.port);
rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
return 0;
}
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