1 /* This file is part of the Emulex RoCE Device Driver for
2 * RoCE (RDMA over Converged Ethernet) adapters.
3 * Copyright (C) 2012-2015 Emulex. All rights reserved.
4 * EMULEX and SLI are trademarks of Emulex.
7 * This software is available to you under a choice of one of two licenses.
8 * You may choose to be licensed under the terms of the GNU General Public
9 * License (GPL) Version 2, available from the file COPYING in the main
10 * directory of this source tree, or the BSD license below:
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * - Redistributions of source code must retain the above copyright notice,
17 * this list of conditions and the following disclaimer.
19 * - Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the distribution.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * Contact Information:
36 * linux-drivers@emulex.com
40 * Costa Mesa, CA 92626
43 #include <net/neighbour.h>
44 #include <net/netevent.h>
46 #include <rdma/ib_addr.h>
47 #include <rdma/ib_mad.h>
48 #include <rdma/ib_cache.h>
51 #include "ocrdma_verbs.h"
52 #include "ocrdma_ah.h"
53 #include "ocrdma_hw.h"
54 #include "ocrdma_stats.h"
56 #define OCRDMA_VID_PCP_SHIFT 0xD
58 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
59 struct ib_ah_attr *attr, union ib_gid *sgid,
60 int pdid, bool *isvlan, u16 vlan_tag)
63 struct ocrdma_eth_vlan eth;
64 struct ocrdma_grh grh;
67 memset(ð, 0, sizeof(eth));
68 memset(&grh, 0, sizeof(grh));
71 if (!vlan_tag || (vlan_tag > 0xFFF))
73 if (vlan_tag || dev->pfc_state) {
75 pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
77 pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
80 eth.eth_type = cpu_to_be16(0x8100);
81 eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
82 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
83 eth.vlan_tag = cpu_to_be16(vlan_tag);
84 eth_sz = sizeof(struct ocrdma_eth_vlan);
87 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
88 eth_sz = sizeof(struct ocrdma_eth_basic);
91 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
92 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]);
95 ah->sgid_index = attr->grh.sgid_index;
96 memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
97 memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw));
99 grh.tclass_flow = cpu_to_be32((6 << 28) |
100 (attr->grh.traffic_class << 24) |
101 attr->grh.flow_label);
102 /* 0x1b is next header value in GRH */
103 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
104 (0x1b << 8) | attr->grh.hop_limit);
106 memcpy(&ah->av->eth_hdr, ð, eth_sz);
107 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
109 ah->av->valid |= OCRDMA_AV_VLAN_VALID;
110 ah->av->valid = cpu_to_le32(ah->av->valid);
114 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
118 struct ocrdma_ah *ah;
120 u16 vlan_tag = 0xffff;
121 struct ib_gid_attr sgid_attr;
122 struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
123 struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
126 if (!(attr->ah_flags & IB_AH_GRH))
127 return ERR_PTR(-EINVAL);
129 if (atomic_cmpxchg(&dev->update_sl, 1, 0))
130 ocrdma_init_service_level(dev);
131 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
133 return ERR_PTR(-ENOMEM);
135 status = ocrdma_alloc_av(dev, ah);
139 status = ib_get_cached_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid,
142 pr_err("%s(): Failed to query sgid, status = %d\n",
146 if (sgid_attr.ndev) {
147 if (is_vlan_dev(sgid_attr.ndev))
148 vlan_tag = vlan_dev_vlan_id(sgid_attr.ndev);
149 dev_put(sgid_attr.ndev);
153 (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
154 (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
155 status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid,
156 attr->dmac, &vlan_tag,
157 sgid_attr.ndev->ifindex);
159 pr_err("%s(): Failed to resolve dmac from gid."
160 "status = %d\n", __func__, status);
165 status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan, vlan_tag);
169 /* if pd is for the user process, pass the ah_id to user space */
170 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
171 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
173 *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
175 *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
176 OCRDMA_AH_VLAN_VALID_SHIFT);
182 ocrdma_free_av(dev, ah);
185 return ERR_PTR(status);
188 int ocrdma_destroy_ah(struct ib_ah *ibah)
190 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
191 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
193 ocrdma_free_av(dev, ah);
198 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
200 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
201 struct ocrdma_av *av = ah->av;
202 struct ocrdma_grh *grh;
203 attr->ah_flags |= IB_AH_GRH;
204 if (ah->av->valid & OCRDMA_AV_VALID) {
205 grh = (struct ocrdma_grh *)((u8 *)ah->av +
206 sizeof(struct ocrdma_eth_vlan));
207 attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
209 grh = (struct ocrdma_grh *)((u8 *)ah->av +
210 sizeof(struct ocrdma_eth_basic));
213 memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
214 attr->grh.sgid_index = ah->sgid_index;
215 attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
216 attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
217 attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
221 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
223 /* modify_ah is unsupported */
227 int ocrdma_process_mad(struct ib_device *ibdev,
228 int process_mad_flags,
230 const struct ib_wc *in_wc,
231 const struct ib_grh *in_grh,
232 const struct ib_mad_hdr *in, size_t in_mad_size,
233 struct ib_mad_hdr *out, size_t *out_mad_size,
234 u16 *out_mad_pkey_index)
237 struct ocrdma_dev *dev;
238 const struct ib_mad *in_mad = (const struct ib_mad *)in;
239 struct ib_mad *out_mad = (struct ib_mad *)out;
241 if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
242 *out_mad_size != sizeof(*out_mad)))
243 return IB_MAD_RESULT_FAILURE;
245 switch (in_mad->mad_hdr.mgmt_class) {
246 case IB_MGMT_CLASS_PERF_MGMT:
247 dev = get_ocrdma_dev(ibdev);
248 if (!ocrdma_pma_counters(dev, out_mad))
249 status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
251 status = IB_MAD_RESULT_SUCCESS;
254 status = IB_MAD_RESULT_SUCCESS;