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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
struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd,
struct rdma_ah_attr *ah_attr,
struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
struct device *dev = &hr_dev->pdev->dev;
struct ib_gid_attr gid_attr;
struct hns_roce_ah *ah;
u16 vlan_tag = 0xffff;
struct in6_addr in6;
const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
union ib_gid sgid;
int ret;
ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
if (!ah)
return ERR_PTR(-ENOMEM);
/* Get mac address */
memcpy(&in6, grh->dgid.raw, sizeof(grh->dgid.raw));
if (rdma_is_multicast_addr(&in6)) {
rdma_get_mcast_mac(&in6, ah->av.mac);
} else {
u8 *dmac = rdma_ah_retrieve_dmac(ah_attr);
if (!dmac)
return ERR_PTR(-EINVAL);
memcpy(ah->av.mac, dmac, ETH_ALEN);
}
/* Get source gid */
ret = ib_get_cached_gid(ibpd->device, rdma_ah_get_port_num(ah_attr),
grh->sgid_index, &sgid, &gid_attr);
if (ret) {
dev_err(dev, "get sgid failed! ret = %d\n", ret);
kfree(ah);
return ERR_PTR(ret);
}
if (gid_attr.ndev) {
if (is_vlan_dev(gid_attr.ndev))
vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
dev_put(gid_attr.ndev);
}
if (vlan_tag < 0x1000)
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_be32(to_hr_pd(ibpd)->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);
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 &ah->ibah;
}
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_LABLE_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;
}
int hns_roce_destroy_ah(struct ib_ah *ah)
{
kfree(to_hr_ah(ah));
return 0;
}
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