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_cache.h> 33 34 #include "ocrdma.h" 35 #include "ocrdma_verbs.h" 36 #include "ocrdma_ah.h" 37 #include "ocrdma_hw.h" 38 39 static inline int set_av_attr(struct ocrdma_ah *ah, 40 struct ib_ah_attr *attr, int pdid) 41 { 42 int status = 0; 43 u16 vlan_tag; bool vlan_enabled = false; 44 struct ocrdma_dev *dev = ah->dev; 45 struct ocrdma_eth_vlan eth; 46 struct ocrdma_grh grh; 47 int eth_sz; 48 49 memset(ð, 0, sizeof(eth)); 50 memset(&grh, 0, sizeof(grh)); 51 52 ah->sgid_index = attr->grh.sgid_index; 53 54 vlan_tag = rdma_get_vlan_id(&attr->grh.dgid); 55 if (vlan_tag && (vlan_tag < 0x1000)) { 56 eth.eth_type = cpu_to_be16(0x8100); 57 eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 58 vlan_tag |= (attr->sl & 7) << 13; 59 eth.vlan_tag = cpu_to_be16(vlan_tag); 60 eth_sz = sizeof(struct ocrdma_eth_vlan); 61 vlan_enabled = true; 62 } else { 63 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); 64 eth_sz = sizeof(struct ocrdma_eth_basic); 65 } 66 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 67 status = ocrdma_resolve_dgid(dev, &attr->grh.dgid, ð.dmac[0]); 68 if (status) 69 return status; 70 status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, 71 (union ib_gid *)&grh.sgid[0]); 72 if (status) 73 return status; 74 75 grh.tclass_flow = cpu_to_be32((6 << 28) | 76 (attr->grh.traffic_class << 24) | 77 attr->grh.flow_label); 78 /* 0x1b is next header value in GRH */ 79 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) | 80 (0x1b << 8) | attr->grh.hop_limit); 81 82 memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw)); 83 memcpy(&ah->av->eth_hdr, ð, eth_sz); 84 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh)); 85 if (vlan_enabled) 86 ah->av->valid |= OCRDMA_AV_VLAN_VALID; 87 return status; 88 } 89 90 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) 91 { 92 u32 *ahid_addr; 93 int status; 94 struct ocrdma_ah *ah; 95 struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); 96 struct ocrdma_dev *dev = pd->dev; 97 98 if (!(attr->ah_flags & IB_AH_GRH)) 99 return ERR_PTR(-EINVAL); 100 101 ah = kzalloc(sizeof *ah, GFP_ATOMIC); 102 if (!ah) 103 return ERR_PTR(-ENOMEM); 104 ah->dev = pd->dev; 105 106 status = ocrdma_alloc_av(dev, ah); 107 if (status) 108 goto av_err; 109 status = set_av_attr(ah, attr, pd->id); 110 if (status) 111 goto av_conf_err; 112 113 /* if pd is for the user process, pass the ah_id to user space */ 114 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) { 115 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid; 116 *ahid_addr = ah->id; 117 } 118 return &ah->ibah; 119 120 av_conf_err: 121 ocrdma_free_av(dev, ah); 122 av_err: 123 kfree(ah); 124 return ERR_PTR(status); 125 } 126 127 int ocrdma_destroy_ah(struct ib_ah *ibah) 128 { 129 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 130 ocrdma_free_av(ah->dev, ah); 131 kfree(ah); 132 return 0; 133 } 134 135 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 136 { 137 struct ocrdma_ah *ah = get_ocrdma_ah(ibah); 138 struct ocrdma_av *av = ah->av; 139 struct ocrdma_grh *grh; 140 attr->ah_flags |= IB_AH_GRH; 141 if (ah->av->valid & Bit(1)) { 142 grh = (struct ocrdma_grh *)((u8 *)ah->av + 143 sizeof(struct ocrdma_eth_vlan)); 144 attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13; 145 } else { 146 grh = (struct ocrdma_grh *)((u8 *)ah->av + 147 sizeof(struct ocrdma_eth_basic)); 148 attr->sl = 0; 149 } 150 memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid)); 151 attr->grh.sgid_index = ah->sgid_index; 152 attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff; 153 attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24; 154 attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff; 155 return 0; 156 } 157 158 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) 159 { 160 /* modify_ah is unsupported */ 161 return -ENOSYS; 162 } 163 164 int ocrdma_process_mad(struct ib_device *ibdev, 165 int process_mad_flags, 166 u8 port_num, 167 struct ib_wc *in_wc, 168 struct ib_grh *in_grh, 169 struct ib_mad *in_mad, struct ib_mad *out_mad) 170 { 171 return IB_MAD_RESULT_SUCCESS; 172 } 173