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/pci.h>
 34#include <rdma/ib_addr.h>
 35#include <rdma/ib_cache.h>
 36#include "hnae3.h"
 37#include "hns_roce_device.h"
 38#include "hns_roce_hw_v2.h"
 39
 40static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
 41{
 42	u32 fl = ah_attr->grh.flow_label;
 43	u16 sport;
 44
 45	if (!fl)
 46		sport = get_random_u32_inclusive(IB_ROCE_UDP_ENCAP_VALID_PORT_MIN,
 47						 IB_ROCE_UDP_ENCAP_VALID_PORT_MAX);
 48	else
 49		sport = rdma_flow_label_to_udp_sport(fl);
 50
 51	return sport;
 52}
 53
 54int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
 55		       struct ib_udata *udata)
 56{
 57	struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
 58	const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
 59	struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
 60	struct hns_roce_ib_create_ah_resp resp = {};
 61	struct hns_roce_ah *ah = to_hr_ah(ibah);
 62	int ret = 0;
 63	u32 max_sl;
 64
 65	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08 && udata)
 66		return -EOPNOTSUPP;
 67
 68	ah->av.port = rdma_ah_get_port_num(ah_attr);
 69	ah->av.gid_index = grh->sgid_index;
 70
 71	if (rdma_ah_get_static_rate(ah_attr))
 72		ah->av.stat_rate = IB_RATE_10_GBPS;
 73
 74	ah->av.hop_limit = grh->hop_limit;
 75	ah->av.flowlabel = grh->flow_label;
 76	ah->av.udp_sport = get_ah_udp_sport(ah_attr);
 77	ah->av.tclass = get_tclass(grh);
 78
 79	ah->av.sl = rdma_ah_get_sl(ah_attr);
 80	max_sl = min_t(u32, MAX_SERVICE_LEVEL, hr_dev->caps.sl_num - 1);
 81	if (unlikely(ah->av.sl > max_sl)) {
 82		ibdev_err_ratelimited(&hr_dev->ib_dev,
 83				      "failed to set sl, sl (%u) shouldn't be larger than %u.\n",
 84				      ah->av.sl, max_sl);
 85		return -EINVAL;
 86	}
 87
 88	memcpy(ah->av.dgid, grh->dgid.raw, HNS_ROCE_GID_SIZE);
 89	memcpy(ah->av.mac, ah_attr->roce.dmac, ETH_ALEN);
 90
 91	/* HIP08 needs to record vlan info in Address Vector */
 92	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
 93		ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
 94					      &ah->av.vlan_id, NULL);
 95		if (ret)
 96			goto err_out;
 97
 98		ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
 99	}
100
101	if (udata) {
102		memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
103		ret = ib_copy_to_udata(udata, &resp,
104				       min(udata->outlen, sizeof(resp)));
105	}
106
107err_out:
108	if (ret)
109		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]);
110
111	return ret;
112}
113
114int hns_roce_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
115{
116	struct hns_roce_ah *ah = to_hr_ah(ibah);
117
118	memset(ah_attr, 0, sizeof(*ah_attr));
119
120	rdma_ah_set_sl(ah_attr, ah->av.sl);
121	rdma_ah_set_port_num(ah_attr, ah->av.port);
122	rdma_ah_set_static_rate(ah_attr, ah->av.stat_rate);
123	rdma_ah_set_grh(ah_attr, NULL, ah->av.flowlabel,
124			ah->av.gid_index, ah->av.hop_limit, ah->av.tclass);
125	rdma_ah_set_dgid_raw(ah_attr, ah->av.dgid);
126
127	return 0;
128}