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 49 #include "ocrdma.h" 50 #include "ocrdma_verbs.h" 51 #include "ocrdma_ah.h" 52 #include "ocrdma_hw.h" 53 #include "ocrdma_stats.h" 54 55 #define OCRDMA_VID_PCP_SHIFT 0xD 56 57 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah, 58 struct ib_ah_attr *attr, union ib_gid *sgid, 59 int pdid, bool *isvlan) 60 { 61 int status = 0; 62 u16 vlan_tag; 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 vlan_tag = attr->vlan_id; 72 if (!vlan_tag || (vlan_tag > 0xFFF)) 73 vlan_tag = dev->pvid; 74 if (vlan_tag || dev->pfc_state) { 75 if (!vlan_tag) { 76 pr_err("ocrdma%d:Using VLAN with PFC is recommended\n", 77 dev->id); 78 pr_err("ocrdma%d:Using VLAN 0 for this connection\n", 79 dev->id); 80 } 81 eth.eth_type = cpu_to_be16(0x8100); 82 eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 83 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT; 84 eth.vlan_tag = cpu_to_be16(vlan_tag); 85 eth_sz = sizeof(struct ocrdma_eth_vlan); 86 *isvlan = true; 87 } else { 88 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 89 eth_sz = sizeof(struct ocrdma_eth_basic); 90 } 91 /* MAC */ 92 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 93 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]); 94 if (status) 95 return status; 96 ah->sgid_index = attr->grh.sgid_index; 97 memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid)); 98 memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw)); 99 100 grh.tclass_flow = cpu_to_be32((6 << 28) | 101 (attr->grh.traffic_class << 24) | 102 attr->grh.flow_label); 103 /* 0x1b is next header value in GRH */ 104 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) | 105 (0x1b << 8) | attr->grh.hop_limit); 106 /* Eth HDR */ 107 memcpy(&ah->av->eth_hdr, ð, eth_sz); 108 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh)); 109 if (*isvlan) 110 ah->av->valid |= OCRDMA_AV_VLAN_VALID; 111 ah->av->valid = cpu_to_le32(ah->av->valid); 112 return status; 113 } 114 115 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) 116 { 117 u32 *ahid_addr; 118 bool isvlan = false; 119 int status; 120 struct ocrdma_ah *ah; 121 struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); 122 struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); 123 union ib_gid sgid; 124 125 if (!(attr->ah_flags & IB_AH_GRH)) 126 return ERR_PTR(-EINVAL); 127 128 if (atomic_cmpxchg(&dev->update_sl, 1, 0)) 129 ocrdma_init_service_level(dev); 130 ah = kzalloc(sizeof(*ah), GFP_ATOMIC); 131 if (!ah) 132 return ERR_PTR(-ENOMEM); 133 134 status = ocrdma_alloc_av(dev, ah); 135 if (status) 136 goto av_err; 137 138 status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid); 139 if (status) { 140 pr_err("%s(): Failed to query sgid, status = %d\n", 141 __func__, status); 142 goto av_conf_err; 143 } 144 145 if ((pd->uctx) && 146 (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) && 147 (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) { 148 status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid, 149 attr->dmac, &attr->vlan_id); 150 if (status) { 151 pr_err("%s(): Failed to resolve dmac from gid." 152 "status = %d\n", __func__, status); 153 goto av_conf_err; 154 } 155 } 156 157 status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan); 158 if (status) 159 goto av_conf_err; 160 161 /* if pd is for the user process, pass the ah_id to user space */ 162 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) { 163 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid; 164 *ahid_addr = 0; 165 *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK; 166 if (isvlan) 167 *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK << 168 OCRDMA_AH_VLAN_VALID_SHIFT); 169 } 170 171 return &ah->ibah; 172 173 av_conf_err: 174 ocrdma_free_av(dev, ah); 175 av_err: 176 kfree(ah); 177 return ERR_PTR(status); 178 } 179 180 int ocrdma_destroy_ah(struct ib_ah *ibah) 181 { 182 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 183 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); 184 185 ocrdma_free_av(dev, ah); 186 kfree(ah); 187 return 0; 188 } 189 190 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 191 { 192 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 193 struct ocrdma_av *av = ah->av; 194 struct ocrdma_grh *grh; 195 attr->ah_flags |= IB_AH_GRH; 196 if (ah->av->valid & OCRDMA_AV_VALID) { 197 grh = (struct ocrdma_grh *)((u8 *)ah->av + 198 sizeof(struct ocrdma_eth_vlan)); 199 attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13; 200 } else { 201 grh = (struct ocrdma_grh *)((u8 *)ah->av + 202 sizeof(struct ocrdma_eth_basic)); 203 attr->sl = 0; 204 } 205 memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid)); 206 attr->grh.sgid_index = ah->sgid_index; 207 attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff; 208 attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24; 209 attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff; 210 return 0; 211 } 212 213 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 214 { 215 /* modify_ah is unsupported */ 216 return -ENOSYS; 217 } 218 219 int ocrdma_process_mad(struct ib_device *ibdev, 220 int process_mad_flags, 221 u8 port_num, 222 const struct ib_wc *in_wc, 223 const struct ib_grh *in_grh, 224 const struct ib_mad_hdr *in, size_t in_mad_size, 225 struct ib_mad_hdr *out, size_t *out_mad_size, 226 u16 *out_mad_pkey_index) 227 { 228 int status; 229 struct ocrdma_dev *dev; 230 const struct ib_mad *in_mad = (const struct ib_mad *)in; 231 struct ib_mad *out_mad = (struct ib_mad *)out; 232 233 if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) || 234 *out_mad_size != sizeof(*out_mad))) 235 return IB_MAD_RESULT_FAILURE; 236 237 switch (in_mad->mad_hdr.mgmt_class) { 238 case IB_MGMT_CLASS_PERF_MGMT: 239 dev = get_ocrdma_dev(ibdev); 240 if (!ocrdma_pma_counters(dev, out_mad)) 241 status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 242 else 243 status = IB_MAD_RESULT_SUCCESS; 244 break; 245 default: 246 status = IB_MAD_RESULT_SUCCESS; 247 break; 248 } 249 return status; 250 } 251