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. * 6 * www.emulex.com * 7 * * 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. * 19 * 20 * Contact Information: 21 * linux-drivers@emulex.com 22 * 23 * Emulex 24 * 3333 Susan Street 25 * Costa Mesa, CA 92626 26 *******************************************************************/ 27 28 #include <net/neighbour.h> 29 #include <net/netevent.h> 30 31 #include <rdma/ib_addr.h> 32 #include <rdma/ib_mad.h> 33 34 #include "ocrdma.h" 35 #include "ocrdma_verbs.h" 36 #include "ocrdma_ah.h" 37 #include "ocrdma_hw.h" 38 #include "ocrdma_stats.h" 39 40 #define OCRDMA_VID_PCP_SHIFT 0xD 41 42 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah, 43 struct ib_ah_attr *attr, union ib_gid *sgid, 44 int pdid, bool *isvlan) 45 { 46 int status = 0; 47 u16 vlan_tag; 48 struct ocrdma_eth_vlan eth; 49 struct ocrdma_grh grh; 50 int eth_sz; 51 52 memset(ð, 0, sizeof(eth)); 53 memset(&grh, 0, sizeof(grh)); 54 55 /* VLAN */ 56 vlan_tag = attr->vlan_id; 57 if (!vlan_tag || (vlan_tag > 0xFFF)) 58 vlan_tag = dev->pvid; 59 if (vlan_tag && (vlan_tag < 0x1000)) { 60 eth.eth_type = cpu_to_be16(0x8100); 61 eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 62 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT; 63 eth.vlan_tag = cpu_to_be16(vlan_tag); 64 eth_sz = sizeof(struct ocrdma_eth_vlan); 65 *isvlan = true; 66 } else { 67 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 68 eth_sz = sizeof(struct ocrdma_eth_basic); 69 } 70 /* MAC */ 71 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 72 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]); 73 if (status) 74 return status; 75 ah->sgid_index = attr->grh.sgid_index; 76 memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid)); 77 memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw)); 78 79 grh.tclass_flow = cpu_to_be32((6 << 28) | 80 (attr->grh.traffic_class << 24) | 81 attr->grh.flow_label); 82 /* 0x1b is next header value in GRH */ 83 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) | 84 (0x1b << 8) | attr->grh.hop_limit); 85 /* Eth HDR */ 86 memcpy(&ah->av->eth_hdr, ð, eth_sz); 87 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh)); 88 if (*isvlan) 89 ah->av->valid |= OCRDMA_AV_VLAN_VALID; 90 ah->av->valid = cpu_to_le32(ah->av->valid); 91 return status; 92 } 93 94 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) 95 { 96 u32 *ahid_addr; 97 bool isvlan = false; 98 int status; 99 struct ocrdma_ah *ah; 100 struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); 101 struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); 102 union ib_gid sgid; 103 104 if (!(attr->ah_flags & IB_AH_GRH)) 105 return ERR_PTR(-EINVAL); 106 107 if (atomic_cmpxchg(&dev->update_sl, 1, 0)) 108 ocrdma_init_service_level(dev); 109 ah = kzalloc(sizeof(*ah), GFP_ATOMIC); 110 if (!ah) 111 return ERR_PTR(-ENOMEM); 112 113 status = ocrdma_alloc_av(dev, ah); 114 if (status) 115 goto av_err; 116 117 status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid); 118 if (status) { 119 pr_err("%s(): Failed to query sgid, status = %d\n", 120 __func__, status); 121 goto av_conf_err; 122 } 123 124 if (pd->uctx) { 125 status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid, 126 attr->dmac, &attr->vlan_id); 127 if (status) { 128 pr_err("%s(): Failed to resolve dmac from gid." 129 "status = %d\n", __func__, status); 130 goto av_conf_err; 131 } 132 } 133 134 status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan); 135 if (status) 136 goto av_conf_err; 137 138 /* if pd is for the user process, pass the ah_id to user space */ 139 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) { 140 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid; 141 *ahid_addr = 0; 142 *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK; 143 if (isvlan) 144 *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK << 145 OCRDMA_AH_VLAN_VALID_SHIFT); 146 } 147 148 return &ah->ibah; 149 150 av_conf_err: 151 ocrdma_free_av(dev, ah); 152 av_err: 153 kfree(ah); 154 return ERR_PTR(status); 155 } 156 157 int ocrdma_destroy_ah(struct ib_ah *ibah) 158 { 159 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 160 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); 161 162 ocrdma_free_av(dev, ah); 163 kfree(ah); 164 return 0; 165 } 166 167 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 168 { 169 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 170 struct ocrdma_av *av = ah->av; 171 struct ocrdma_grh *grh; 172 attr->ah_flags |= IB_AH_GRH; 173 if (ah->av->valid & OCRDMA_AV_VALID) { 174 grh = (struct ocrdma_grh *)((u8 *)ah->av + 175 sizeof(struct ocrdma_eth_vlan)); 176 attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13; 177 } else { 178 grh = (struct ocrdma_grh *)((u8 *)ah->av + 179 sizeof(struct ocrdma_eth_basic)); 180 attr->sl = 0; 181 } 182 memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid)); 183 attr->grh.sgid_index = ah->sgid_index; 184 attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff; 185 attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24; 186 attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff; 187 return 0; 188 } 189 190 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 191 { 192 /* modify_ah is unsupported */ 193 return -ENOSYS; 194 } 195 196 int ocrdma_process_mad(struct ib_device *ibdev, 197 int process_mad_flags, 198 u8 port_num, 199 struct ib_wc *in_wc, 200 struct ib_grh *in_grh, 201 struct ib_mad *in_mad, struct ib_mad *out_mad) 202 { 203 int status; 204 struct ocrdma_dev *dev; 205 206 switch (in_mad->mad_hdr.mgmt_class) { 207 case IB_MGMT_CLASS_PERF_MGMT: 208 dev = get_ocrdma_dev(ibdev); 209 if (!ocrdma_pma_counters(dev, out_mad)) 210 status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 211 else 212 status = IB_MAD_RESULT_SUCCESS; 213 break; 214 default: 215 status = IB_MAD_RESULT_SUCCESS; 216 break; 217 } 218 return status; 219 } 220