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 || dev->pfc_state) { 60 if (!vlan_tag) { 61 pr_err("ocrdma%d:Using VLAN with PFC is recommended\n", 62 dev->id); 63 pr_err("ocrdma%d:Using VLAN 0 for this connection\n", 64 dev->id); 65 } 66 eth.eth_type = cpu_to_be16(0x8100); 67 eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 68 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT; 69 eth.vlan_tag = cpu_to_be16(vlan_tag); 70 eth_sz = sizeof(struct ocrdma_eth_vlan); 71 *isvlan = true; 72 } else { 73 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 74 eth_sz = sizeof(struct ocrdma_eth_basic); 75 } 76 /* MAC */ 77 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 78 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]); 79 if (status) 80 return status; 81 ah->sgid_index = attr->grh.sgid_index; 82 memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid)); 83 memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw)); 84 85 grh.tclass_flow = cpu_to_be32((6 << 28) | 86 (attr->grh.traffic_class << 24) | 87 attr->grh.flow_label); 88 /* 0x1b is next header value in GRH */ 89 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) | 90 (0x1b << 8) | attr->grh.hop_limit); 91 /* Eth HDR */ 92 memcpy(&ah->av->eth_hdr, ð, eth_sz); 93 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh)); 94 if (*isvlan) 95 ah->av->valid |= OCRDMA_AV_VLAN_VALID; 96 ah->av->valid = cpu_to_le32(ah->av->valid); 97 return status; 98 } 99 100 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) 101 { 102 u32 *ahid_addr; 103 bool isvlan = false; 104 int status; 105 struct ocrdma_ah *ah; 106 struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); 107 struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); 108 union ib_gid sgid; 109 110 if (!(attr->ah_flags & IB_AH_GRH)) 111 return ERR_PTR(-EINVAL); 112 113 if (atomic_cmpxchg(&dev->update_sl, 1, 0)) 114 ocrdma_init_service_level(dev); 115 ah = kzalloc(sizeof(*ah), GFP_ATOMIC); 116 if (!ah) 117 return ERR_PTR(-ENOMEM); 118 119 status = ocrdma_alloc_av(dev, ah); 120 if (status) 121 goto av_err; 122 123 status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid); 124 if (status) { 125 pr_err("%s(): Failed to query sgid, status = %d\n", 126 __func__, status); 127 goto av_conf_err; 128 } 129 130 if (pd->uctx) { 131 status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid, 132 attr->dmac, &attr->vlan_id); 133 if (status) { 134 pr_err("%s(): Failed to resolve dmac from gid." 135 "status = %d\n", __func__, status); 136 goto av_conf_err; 137 } 138 } 139 140 status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan); 141 if (status) 142 goto av_conf_err; 143 144 /* if pd is for the user process, pass the ah_id to user space */ 145 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) { 146 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid; 147 *ahid_addr = 0; 148 *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK; 149 if (isvlan) 150 *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK << 151 OCRDMA_AH_VLAN_VALID_SHIFT); 152 } 153 154 return &ah->ibah; 155 156 av_conf_err: 157 ocrdma_free_av(dev, ah); 158 av_err: 159 kfree(ah); 160 return ERR_PTR(status); 161 } 162 163 int ocrdma_destroy_ah(struct ib_ah *ibah) 164 { 165 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 166 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); 167 168 ocrdma_free_av(dev, ah); 169 kfree(ah); 170 return 0; 171 } 172 173 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 174 { 175 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 176 struct ocrdma_av *av = ah->av; 177 struct ocrdma_grh *grh; 178 attr->ah_flags |= IB_AH_GRH; 179 if (ah->av->valid & OCRDMA_AV_VALID) { 180 grh = (struct ocrdma_grh *)((u8 *)ah->av + 181 sizeof(struct ocrdma_eth_vlan)); 182 attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13; 183 } else { 184 grh = (struct ocrdma_grh *)((u8 *)ah->av + 185 sizeof(struct ocrdma_eth_basic)); 186 attr->sl = 0; 187 } 188 memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid)); 189 attr->grh.sgid_index = ah->sgid_index; 190 attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff; 191 attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24; 192 attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff; 193 return 0; 194 } 195 196 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 197 { 198 /* modify_ah is unsupported */ 199 return -ENOSYS; 200 } 201 202 int ocrdma_process_mad(struct ib_device *ibdev, 203 int process_mad_flags, 204 u8 port_num, 205 struct ib_wc *in_wc, 206 struct ib_grh *in_grh, 207 struct ib_mad *in_mad, struct ib_mad *out_mad) 208 { 209 int status; 210 struct ocrdma_dev *dev; 211 212 switch (in_mad->mad_hdr.mgmt_class) { 213 case IB_MGMT_CLASS_PERF_MGMT: 214 dev = get_ocrdma_dev(ibdev); 215 if (!ocrdma_pma_counters(dev, out_mad)) 216 status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 217 else 218 status = IB_MAD_RESULT_SUCCESS; 219 break; 220 default: 221 status = IB_MAD_RESULT_SUCCESS; 222 break; 223 } 224 return status; 225 } 226