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. 5 * www.emulex.com 6 * 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: 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * - Redistributions of source code must retain the above copyright notice, 17 * this list of conditions and the following disclaimer. 18 * 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. 22 * 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. 34 * 35 * Contact Information: 36 * linux-drivers@emulex.com 37 * 38 * Emulex 39 * 3333 Susan Street 40 * Costa Mesa, CA 92626 41 */ 42 43 #include <net/neighbour.h> 44 #include <net/netevent.h> 45 46 #include <rdma/ib_addr.h> 47 #include <rdma/ib_mad.h> 48 #include <rdma/ib_cache.h> 49 50 #include "ocrdma.h" 51 #include "ocrdma_verbs.h" 52 #include "ocrdma_ah.h" 53 #include "ocrdma_hw.h" 54 #include "ocrdma_stats.h" 55 56 #define OCRDMA_VID_PCP_SHIFT 0xD 57 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) 61 { 62 int status = 0; 63 struct ocrdma_eth_vlan eth; 64 struct ocrdma_grh grh; 65 int eth_sz; 66 67 memset(ð, 0, sizeof(eth)); 68 memset(&grh, 0, sizeof(grh)); 69 70 /* VLAN */ 71 if (!vlan_tag || (vlan_tag > 0xFFF)) 72 vlan_tag = dev->pvid; 73 if (vlan_tag || dev->pfc_state) { 74 if (!vlan_tag) { 75 pr_err("ocrdma%d:Using VLAN with PFC is recommended\n", 76 dev->id); 77 pr_err("ocrdma%d:Using VLAN 0 for this connection\n", 78 dev->id); 79 } 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); 85 *isvlan = true; 86 } else { 87 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 88 eth_sz = sizeof(struct ocrdma_eth_basic); 89 } 90 /* MAC */ 91 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 92 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]); 93 if (status) 94 return status; 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)); 98 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); 105 /* Eth HDR */ 106 memcpy(&ah->av->eth_hdr, ð, eth_sz); 107 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh)); 108 if (*isvlan) 109 ah->av->valid |= OCRDMA_AV_VLAN_VALID; 110 ah->av->valid = cpu_to_le32(ah->av->valid); 111 return status; 112 } 113 114 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) 115 { 116 u32 *ahid_addr; 117 int status; 118 struct ocrdma_ah *ah; 119 bool isvlan = false; 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); 124 union ib_gid sgid; 125 126 if (!(attr->ah_flags & IB_AH_GRH)) 127 return ERR_PTR(-EINVAL); 128 129 if (atomic_cmpxchg(&dev->update_sl, 1, 0)) 130 ocrdma_init_service_level(dev); 131 ah = kzalloc(sizeof(*ah), GFP_ATOMIC); 132 if (!ah) 133 return ERR_PTR(-ENOMEM); 134 135 status = ocrdma_alloc_av(dev, ah); 136 if (status) 137 goto av_err; 138 139 status = ib_get_cached_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid, 140 &sgid_attr); 141 if (status) { 142 pr_err("%s(): Failed to query sgid, status = %d\n", 143 __func__, status); 144 goto av_conf_err; 145 } 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); 150 } 151 152 if ((pd->uctx) && 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); 158 if (status) { 159 pr_err("%s(): Failed to resolve dmac from gid." 160 "status = %d\n", __func__, status); 161 goto av_conf_err; 162 } 163 } 164 165 status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan, vlan_tag); 166 if (status) 167 goto av_conf_err; 168 169 /* 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; 172 *ahid_addr = 0; 173 *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK; 174 if (isvlan) 175 *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK << 176 OCRDMA_AH_VLAN_VALID_SHIFT); 177 } 178 179 return &ah->ibah; 180 181 av_conf_err: 182 ocrdma_free_av(dev, ah); 183 av_err: 184 kfree(ah); 185 return ERR_PTR(status); 186 } 187 188 int ocrdma_destroy_ah(struct ib_ah *ibah) 189 { 190 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 191 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); 192 193 ocrdma_free_av(dev, ah); 194 kfree(ah); 195 return 0; 196 } 197 198 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 199 { 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; 208 } else { 209 grh = (struct ocrdma_grh *)((u8 *)ah->av + 210 sizeof(struct ocrdma_eth_basic)); 211 attr->sl = 0; 212 } 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; 218 return 0; 219 } 220 221 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 222 { 223 /* modify_ah is unsupported */ 224 return -ENOSYS; 225 } 226 227 int ocrdma_process_mad(struct ib_device *ibdev, 228 int process_mad_flags, 229 u8 port_num, 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) 235 { 236 int status; 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; 240 241 if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) || 242 *out_mad_size != sizeof(*out_mad))) 243 return IB_MAD_RESULT_FAILURE; 244 245 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; 250 else 251 status = IB_MAD_RESULT_SUCCESS; 252 break; 253 default: 254 status = IB_MAD_RESULT_SUCCESS; 255 break; 256 } 257 return status; 258 } 259