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1/* This file is part of the Emulex RoCE Device Driver for2 * 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.com6 *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 Public9 * License (GPL) Version 2, available from the file COPYING in the main10 * directory of this source tree, or the BSD license below:11 *12 * Redistribution and use in source and binary forms, with or without13 * modification, are permitted provided that the following conditions14 * 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 copyright20 * notice, this list of conditions and the following disclaimer in21 * 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,THE25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.34 *35 * Contact Information:36 * linux-drivers@emulex.com37 *38 * Emulex39 * 3333 Susan Street40 * Costa Mesa, CA 9262641 */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 0xD57 58static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)59{60 switch (hdr_type) {61 case OCRDMA_L3_TYPE_IB_GRH:62 return (u16)ETH_P_IBOE;63 case OCRDMA_L3_TYPE_IPV4:64 return (u16)0x0800;65 case OCRDMA_L3_TYPE_IPV6:66 return (u16)0x86dd;67 default:68 pr_err("ocrdma%d: Invalid network header\n", devid);69 return 0;70 }71}72 73static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,74 struct rdma_ah_attr *attr, const union ib_gid *sgid,75 int pdid, bool *isvlan, u16 vlan_tag)76{77 int status;78 struct ocrdma_eth_vlan eth;79 struct ocrdma_grh grh;80 int eth_sz;81 u16 proto_num = 0;82 u8 nxthdr = 0x11;83 struct iphdr ipv4;84 const struct ib_global_route *ib_grh;85 union {86 struct sockaddr_in _sockaddr_in;87 struct sockaddr_in6 _sockaddr_in6;88 } sgid_addr, dgid_addr;89 90 memset(ð, 0, sizeof(eth));91 memset(&grh, 0, sizeof(grh));92 93 /* Protocol Number */94 proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);95 if (!proto_num)96 return -EINVAL;97 nxthdr = (proto_num == ETH_P_IBOE) ? 0x1b : 0x11;98 /* VLAN */99 if (!vlan_tag || (vlan_tag > 0xFFF))100 vlan_tag = dev->pvid;101 if (vlan_tag || dev->pfc_state) {102 if (!vlan_tag) {103 pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",104 dev->id);105 pr_err("ocrdma%d:Using VLAN 0 for this connection\n",106 dev->id);107 }108 eth.eth_type = cpu_to_be16(0x8100);109 eth.roce_eth_type = cpu_to_be16(proto_num);110 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;111 eth.vlan_tag = cpu_to_be16(vlan_tag);112 eth_sz = sizeof(struct ocrdma_eth_vlan);113 *isvlan = true;114 } else {115 eth.eth_type = cpu_to_be16(proto_num);116 eth_sz = sizeof(struct ocrdma_eth_basic);117 }118 /* MAC */119 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);120 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]);121 if (status)122 return status;123 ib_grh = rdma_ah_read_grh(attr);124 ah->sgid_index = ib_grh->sgid_index;125 /* Eth HDR */126 memcpy(&ah->av->eth_hdr, ð, eth_sz);127 if (ah->hdr_type == RDMA_NETWORK_IPV4) {128 *((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) |129 ib_grh->traffic_class);130 ipv4.id = cpu_to_be16(pdid);131 ipv4.frag_off = htons(IP_DF);132 ipv4.tot_len = htons(0);133 ipv4.ttl = ib_grh->hop_limit;134 ipv4.protocol = nxthdr;135 rdma_gid2ip((struct sockaddr *)&sgid_addr, sgid);136 ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;137 rdma_gid2ip((struct sockaddr*)&dgid_addr, &ib_grh->dgid);138 ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;139 memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));140 } else {141 memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));142 grh.tclass_flow = cpu_to_be32((6 << 28) |143 (ib_grh->traffic_class << 24) |144 ib_grh->flow_label);145 memcpy(&grh.dgid[0], ib_grh->dgid.raw,146 sizeof(ib_grh->dgid.raw));147 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |148 (nxthdr << 8) |149 ib_grh->hop_limit);150 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));151 }152 if (*isvlan)153 ah->av->valid |= OCRDMA_AV_VLAN_VALID;154 ah->av->valid = cpu_to_le32(ah->av->valid);155 return status;156}157 158int ocrdma_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,159 struct ib_udata *udata)160{161 u32 *ahid_addr;162 int status;163 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);164 bool isvlan = false;165 u16 vlan_tag = 0xffff;166 const struct ib_gid_attr *sgid_attr;167 struct ocrdma_pd *pd = get_ocrdma_pd(ibah->pd);168 struct rdma_ah_attr *attr = init_attr->ah_attr;169 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);170 171 if ((attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||172 !(rdma_ah_get_ah_flags(attr) & IB_AH_GRH))173 return -EINVAL;174 175 if (atomic_cmpxchg(&dev->update_sl, 1, 0))176 ocrdma_init_service_level(dev);177 178 sgid_attr = attr->grh.sgid_attr;179 status = rdma_read_gid_l2_fields(sgid_attr, &vlan_tag, NULL);180 if (status)181 return status;182 183 status = ocrdma_alloc_av(dev, ah);184 if (status)185 goto av_err;186 187 /* Get network header type for this GID */188 ah->hdr_type = rdma_gid_attr_network_type(sgid_attr);189 190 status = set_av_attr(dev, ah, attr, &sgid_attr->gid, pd->id,191 &isvlan, vlan_tag);192 if (status)193 goto av_conf_err;194 195 /* if pd is for the user process, pass the ah_id to user space */196 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {197 ahid_addr = pd->uctx->ah_tbl.va + rdma_ah_get_dlid(attr);198 *ahid_addr = 0;199 *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;200 if (ocrdma_is_udp_encap_supported(dev)) {201 *ahid_addr |= ((u32)ah->hdr_type &202 OCRDMA_AH_L3_TYPE_MASK) <<203 OCRDMA_AH_L3_TYPE_SHIFT;204 }205 if (isvlan)206 *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<207 OCRDMA_AH_VLAN_VALID_SHIFT);208 }209 210 return 0;211 212av_conf_err:213 ocrdma_free_av(dev, ah);214av_err:215 return status;216}217 218int ocrdma_destroy_ah(struct ib_ah *ibah, u32 flags)219{220 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);221 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);222 223 ocrdma_free_av(dev, ah);224 return 0;225}226 227int ocrdma_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)228{229 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);230 struct ocrdma_av *av = ah->av;231 struct ocrdma_grh *grh;232 233 attr->type = ibah->type;234 if (ah->av->valid & OCRDMA_AV_VALID) {235 grh = (struct ocrdma_grh *)((u8 *)ah->av +236 sizeof(struct ocrdma_eth_vlan));237 rdma_ah_set_sl(attr, be16_to_cpu(av->eth_hdr.vlan_tag) >> 13);238 } else {239 grh = (struct ocrdma_grh *)((u8 *)ah->av +240 sizeof(struct ocrdma_eth_basic));241 rdma_ah_set_sl(attr, 0);242 }243 rdma_ah_set_grh(attr, NULL,244 be32_to_cpu(grh->tclass_flow) & 0xffffffff,245 ah->sgid_index,246 be32_to_cpu(grh->pdid_hoplimit) & 0xff,247 be32_to_cpu(grh->tclass_flow) >> 24);248 rdma_ah_set_dgid_raw(attr, &grh->dgid[0]);249 return 0;250}251 252int ocrdma_process_mad(struct ib_device *ibdev, int process_mad_flags,253 u32 port_num, const struct ib_wc *in_wc,254 const struct ib_grh *in_grh, const struct ib_mad *in,255 struct ib_mad *out, size_t *out_mad_size,256 u16 *out_mad_pkey_index)257{258 int status = IB_MAD_RESULT_SUCCESS;259 struct ocrdma_dev *dev;260 261 if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT) {262 dev = get_ocrdma_dev(ibdev);263 ocrdma_pma_counters(dev, out);264 status |= IB_MAD_RESULT_REPLY;265 }266 267 return status;268}269