1 /*******************************************************************
2 * This file is part of the Emulex RoCE Device Driver for *
3 * RoCE (RDMA over Converged Ethernet) adapters. *
4 * Copyright (C) 2008-2012 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
8 * This program is free software; you can redistribute it and/or *
9 * modify it under the terms of version 2 of the GNU General *
10 * Public License as published by the Free Software Foundation. *
11 * This program is distributed in the hope that it will be useful. *
12 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
13 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
14 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
15 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
16 * TO BE LEGALLY INVALID. See the GNU General Public License for *
17 * more details, a copy of which can be found in the file COPYING *
18 * included with this package. *
20 * Contact Information:
21 * linux-drivers@emulex.com
25 * Costa Mesa, CA 92626
26 *******************************************************************/
28 #include <net/neighbour.h>
29 #include <net/netevent.h>
31 #include <rdma/ib_addr.h>
34 #include "ocrdma_verbs.h"
35 #include "ocrdma_ah.h"
36 #include "ocrdma_hw.h"
38 #define OCRDMA_VID_PCP_SHIFT 0xD
40 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
41 struct ib_ah_attr *attr, int pdid)
44 u16 vlan_tag; bool vlan_enabled = false;
45 struct ocrdma_eth_vlan eth;
46 struct ocrdma_grh grh;
49 memset(ð, 0, sizeof(eth));
50 memset(&grh, 0, sizeof(grh));
52 ah->sgid_index = attr->grh.sgid_index;
54 vlan_tag = attr->vlan_id;
55 if (!vlan_tag || (vlan_tag > 0xFFF))
57 if (vlan_tag && (vlan_tag < 0x1000)) {
58 eth.eth_type = cpu_to_be16(0x8100);
59 eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
60 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
61 eth.vlan_tag = cpu_to_be16(vlan_tag);
62 eth_sz = sizeof(struct ocrdma_eth_vlan);
65 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
66 eth_sz = sizeof(struct ocrdma_eth_basic);
68 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
69 memcpy(ð.dmac[0], attr->dmac, ETH_ALEN);
70 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]);
73 status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index,
74 (union ib_gid *)&grh.sgid[0]);
78 grh.tclass_flow = cpu_to_be32((6 << 28) |
79 (attr->grh.traffic_class << 24) |
80 attr->grh.flow_label);
81 /* 0x1b is next header value in GRH */
82 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
83 (0x1b << 8) | attr->grh.hop_limit);
85 memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw));
86 memcpy(&ah->av->eth_hdr, ð, eth_sz);
87 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
89 ah->av->valid |= OCRDMA_AV_VLAN_VALID;
90 ah->av->valid = cpu_to_le32(ah->av->valid);
94 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
99 struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
100 struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
102 if (!(attr->ah_flags & IB_AH_GRH))
103 return ERR_PTR(-EINVAL);
105 if (atomic_cmpxchg(&dev->update_sl, 1, 0))
106 ocrdma_init_service_level(dev);
107 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
109 return ERR_PTR(-ENOMEM);
111 status = ocrdma_alloc_av(dev, ah);
114 status = set_av_attr(dev, ah, attr, pd->id);
118 /* if pd is for the user process, pass the ah_id to user space */
119 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
120 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
126 ocrdma_free_av(dev, ah);
129 return ERR_PTR(status);
132 int ocrdma_destroy_ah(struct ib_ah *ibah)
134 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
135 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
137 ocrdma_free_av(dev, ah);
142 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
144 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
145 struct ocrdma_av *av = ah->av;
146 struct ocrdma_grh *grh;
147 attr->ah_flags |= IB_AH_GRH;
148 if (ah->av->valid & Bit(1)) {
149 grh = (struct ocrdma_grh *)((u8 *)ah->av +
150 sizeof(struct ocrdma_eth_vlan));
151 attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
153 grh = (struct ocrdma_grh *)((u8 *)ah->av +
154 sizeof(struct ocrdma_eth_basic));
157 memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
158 attr->grh.sgid_index = ah->sgid_index;
159 attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
160 attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
161 attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
165 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
167 /* modify_ah is unsupported */
171 int ocrdma_process_mad(struct ib_device *ibdev,
172 int process_mad_flags,
175 struct ib_grh *in_grh,
176 struct ib_mad *in_mad, struct ib_mad *out_mad)
178 return IB_MAD_RESULT_SUCCESS;