1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2/*
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 */
6
7#include "rxe.h"
8#include "rxe_loc.h"
9
10void rxe_init_av(struct rdma_ah_attr *attr, struct rxe_av *av)
11{
12	rxe_av_from_attr(rdma_ah_get_port_num(attr), av, attr);
13	rxe_av_fill_ip_info(av, attr);
14	memcpy(av->dmac, attr->roce.dmac, ETH_ALEN);
15}
16
17int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr)
18{
19	const struct ib_global_route *grh = rdma_ah_read_grh(attr);
20	struct rxe_port *port;
21	int type;
22
23	port = &rxe->port;
24
25	if (rdma_ah_get_ah_flags(attr) & IB_AH_GRH) {
26		if (grh->sgid_index > port->attr.gid_tbl_len) {
27			pr_warn("invalid sgid index = %d\n",
28					grh->sgid_index);
29			return -EINVAL;
30		}
31
32		type = rdma_gid_attr_network_type(grh->sgid_attr);
33		if (type < RDMA_NETWORK_IPV4 ||
34		    type > RDMA_NETWORK_IPV6) {
35			pr_warn("invalid network type for rdma_rxe = %d\n",
36					type);
37			return -EINVAL;
38		}
39	}
40
41	return 0;
42}
43
44void rxe_av_from_attr(u8 port_num, struct rxe_av *av,
45		     struct rdma_ah_attr *attr)
46{
47	const struct ib_global_route *grh = rdma_ah_read_grh(attr);
48
49	memset(av, 0, sizeof(*av));
50	memcpy(av->grh.dgid.raw, grh->dgid.raw, sizeof(grh->dgid.raw));
51	av->grh.flow_label = grh->flow_label;
52	av->grh.sgid_index = grh->sgid_index;
53	av->grh.hop_limit = grh->hop_limit;
54	av->grh.traffic_class = grh->traffic_class;
55	av->port_num = port_num;
56}
57
58void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr)
59{
60	struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
61
62	attr->type = RDMA_AH_ATTR_TYPE_ROCE;
63
64	memcpy(grh->dgid.raw, av->grh.dgid.raw, sizeof(av->grh.dgid.raw));
65	grh->flow_label = av->grh.flow_label;
66	grh->sgid_index = av->grh.sgid_index;
67	grh->hop_limit = av->grh.hop_limit;
68	grh->traffic_class = av->grh.traffic_class;
69
70	rdma_ah_set_ah_flags(attr, IB_AH_GRH);
71	rdma_ah_set_port_num(attr, av->port_num);
72}
73
74void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr)
75{
76	const struct ib_gid_attr *sgid_attr = attr->grh.sgid_attr;
77	int ibtype;
78	int type;
79
80	rdma_gid2ip((struct sockaddr *)&av->sgid_addr, &sgid_attr->gid);
81	rdma_gid2ip((struct sockaddr *)&av->dgid_addr,
82		    &rdma_ah_read_grh(attr)->dgid);
83
84	ibtype = rdma_gid_attr_network_type(sgid_attr);
85
86	switch (ibtype) {
87	case RDMA_NETWORK_IPV4:
88		type = RXE_NETWORK_TYPE_IPV4;
89		break;
90	case RDMA_NETWORK_IPV6:
91		type = RXE_NETWORK_TYPE_IPV6;
92		break;
93	default:
94		/* not reached - checked in rxe_av_chk_attr */
95		type = 0;
96		break;
97	}
98
99	av->network_type = type;
100}
101
102struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt)
103{
104	if (!pkt || !pkt->qp)
105		return NULL;
106
107	if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC)
108		return &pkt->qp->pri_av;
109
110	return (pkt->wqe) ? &pkt->wqe->av : NULL;
111}
112