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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 | /* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Mellanox Technologies. All rights reserved. * Copyright (c) 2004 Voltaire, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/string.h> #include <linux/slab.h> #include <rdma/ib_verbs.h> #include <rdma/ib_mad.h> #include <rdma/ib_smi.h> #include "mthca_dev.h" #include "mthca_cmd.h" enum { MTHCA_VENDOR_CLASS1 = 0x9, MTHCA_VENDOR_CLASS2 = 0xa }; static int mthca_update_rate(struct mthca_dev *dev, u8 port_num) { struct ib_port_attr *tprops = NULL; int ret; tprops = kmalloc(sizeof *tprops, GFP_KERNEL); if (!tprops) return -ENOMEM; ret = ib_query_port(&dev->ib_dev, port_num, tprops); if (ret) { dev_warn(&dev->ib_dev.dev, "ib_query_port failed (%d) forport %d\n", ret, port_num); goto out; } dev->rate[port_num - 1] = tprops->active_speed * ib_width_enum_to_int(tprops->active_width); out: kfree(tprops); return ret; } static void update_sm_ah(struct mthca_dev *dev, u8 port_num, u16 lid, u8 sl) { struct ib_ah *new_ah; struct rdma_ah_attr ah_attr; unsigned long flags; if (!dev->send_agent[port_num - 1][0]) return; memset(&ah_attr, 0, sizeof ah_attr); ah_attr.type = rdma_ah_find_type(&dev->ib_dev, port_num); rdma_ah_set_dlid(&ah_attr, lid); rdma_ah_set_sl(&ah_attr, sl); rdma_ah_set_port_num(&ah_attr, port_num); new_ah = rdma_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, &ah_attr, 0); if (IS_ERR(new_ah)) return; spin_lock_irqsave(&dev->sm_lock, flags); if (dev->sm_ah[port_num - 1]) rdma_destroy_ah(dev->sm_ah[port_num - 1], 0); dev->sm_ah[port_num - 1] = new_ah; spin_unlock_irqrestore(&dev->sm_lock, flags); } /* * Snoop SM MADs for port info and P_Key table sets, so we can * synthesize LID change and P_Key change events. */ static void smp_snoop(struct ib_device *ibdev, u8 port_num, const struct ib_mad *mad, u16 prev_lid) { struct ib_event event; if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && mad->mad_hdr.method == IB_MGMT_METHOD_SET) { if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { struct ib_port_info *pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data; u16 lid = be16_to_cpu(pinfo->lid); mthca_update_rate(to_mdev(ibdev), port_num); update_sm_ah(to_mdev(ibdev), port_num, be16_to_cpu(pinfo->sm_lid), pinfo->neighbormtu_mastersmsl & 0xf); event.device = ibdev; event.element.port_num = port_num; if (pinfo->clientrereg_resv_subnetto & 0x80) { event.event = IB_EVENT_CLIENT_REREGISTER; ib_dispatch_event(&event); } if (prev_lid != lid) { event.event = IB_EVENT_LID_CHANGE; ib_dispatch_event(&event); } } if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { event.device = ibdev; event.event = IB_EVENT_PKEY_CHANGE; event.element.port_num = port_num; ib_dispatch_event(&event); } } } static void node_desc_override(struct ib_device *dev, struct ib_mad *mad) { if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { mutex_lock(&to_mdev(dev)->cap_mask_mutex); memcpy(((struct ib_smp *) mad)->data, dev->node_desc, IB_DEVICE_NODE_DESC_MAX); mutex_unlock(&to_mdev(dev)->cap_mask_mutex); } } static void forward_trap(struct mthca_dev *dev, u8 port_num, const struct ib_mad *mad) { int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; struct ib_mad_send_buf *send_buf; struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; int ret; unsigned long flags; if (agent) { send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, GFP_ATOMIC, IB_MGMT_BASE_VERSION); if (IS_ERR(send_buf)) return; /* * We rely here on the fact that MLX QPs don't use the * address handle after the send is posted (this is * wrong following the IB spec strictly, but we know * it's OK for our devices). */ spin_lock_irqsave(&dev->sm_lock, flags); memcpy(send_buf->mad, mad, sizeof *mad); if ((send_buf->ah = dev->sm_ah[port_num - 1])) ret = ib_post_send_mad(send_buf, NULL); else ret = -EINVAL; spin_unlock_irqrestore(&dev->sm_lock, flags); if (ret) ib_free_send_mad(send_buf); } } int mthca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh, const struct ib_mad *in, struct ib_mad *out, size_t *out_mad_size, u16 *out_mad_pkey_index) { int err; u16 slid = in_wc ? ib_lid_cpu16(in_wc->slid) : be16_to_cpu(IB_LID_PERMISSIVE); u16 prev_lid = 0; struct ib_port_attr pattr; /* Forward locally generated traps to the SM */ if (in->mad_hdr.method == IB_MGMT_METHOD_TRAP && !slid) { forward_trap(to_mdev(ibdev), port_num, in); return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; } /* * Only handle SM gets, sets and trap represses for SM class * * Only handle PMA and Mellanox vendor-specific class gets and * sets for other classes. */ if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { if (in->mad_hdr.method != IB_MGMT_METHOD_GET && in->mad_hdr.method != IB_MGMT_METHOD_SET && in->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) return IB_MAD_RESULT_SUCCESS; /* * Don't process SMInfo queries or vendor-specific * MADs -- the SMA can't handle them. */ if (in->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || ((in->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == IB_SMP_ATTR_VENDOR_MASK)) return IB_MAD_RESULT_SUCCESS; } else if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || in->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 || in->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) { if (in->mad_hdr.method != IB_MGMT_METHOD_GET && in->mad_hdr.method != IB_MGMT_METHOD_SET) return IB_MAD_RESULT_SUCCESS; } else return IB_MAD_RESULT_SUCCESS; if ((in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && in->mad_hdr.method == IB_MGMT_METHOD_SET && in->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && !ib_query_port(ibdev, port_num, &pattr)) prev_lid = ib_lid_cpu16(pattr.lid); err = mthca_MAD_IFC(to_mdev(ibdev), mad_flags & IB_MAD_IGNORE_MKEY, mad_flags & IB_MAD_IGNORE_BKEY, port_num, in_wc, in_grh, in, out); if (err == -EBADMSG) return IB_MAD_RESULT_SUCCESS; else if (err) { mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err); return IB_MAD_RESULT_FAILURE; } if (!out->mad_hdr.status) { smp_snoop(ibdev, port_num, in, prev_lid); node_desc_override(ibdev, out); } /* set return bit in status of directed route responses */ if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) out->mad_hdr.status |= cpu_to_be16(1 << 15); if (in->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) /* no response for trap repress */ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; } static void send_handler(struct ib_mad_agent *agent, struct ib_mad_send_wc *mad_send_wc) { ib_free_send_mad(mad_send_wc->send_buf); } int mthca_create_agents(struct mthca_dev *dev) { struct ib_mad_agent *agent; int p, q; int ret; spin_lock_init(&dev->sm_lock); for (p = 0; p < dev->limits.num_ports; ++p) for (q = 0; q <= 1; ++q) { agent = ib_register_mad_agent(&dev->ib_dev, p + 1, q ? IB_QPT_GSI : IB_QPT_SMI, NULL, 0, send_handler, NULL, NULL, 0); if (IS_ERR(agent)) { ret = PTR_ERR(agent); goto err; } dev->send_agent[p][q] = agent; } for (p = 1; p <= dev->limits.num_ports; ++p) { ret = mthca_update_rate(dev, p); if (ret) { mthca_err(dev, "Failed to obtain port %d rate." " aborting.\n", p); goto err; } } return 0; err: for (p = 0; p < dev->limits.num_ports; ++p) for (q = 0; q <= 1; ++q) if (dev->send_agent[p][q]) ib_unregister_mad_agent(dev->send_agent[p][q]); return ret; } void mthca_free_agents(struct mthca_dev *dev) { struct ib_mad_agent *agent; int p, q; for (p = 0; p < dev->limits.num_ports; ++p) { for (q = 0; q <= 1; ++q) { agent = dev->send_agent[p][q]; dev->send_agent[p][q] = NULL; ib_unregister_mad_agent(agent); } if (dev->sm_ah[p]) rdma_destroy_ah(dev->sm_ah[p], RDMA_DESTROY_AH_SLEEPABLE); } } |