1 /* 2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include <rdma/ib_mad.h> 34 #include <rdma/ib_smi.h> 35 36 #include <linux/mlx4/cmd.h> 37 #include <linux/gfp.h> 38 #include <rdma/ib_pma.h> 39 40 #include "mlx4_ib.h" 41 42 enum { 43 MLX4_IB_VENDOR_CLASS1 = 0x9, 44 MLX4_IB_VENDOR_CLASS2 = 0xa 45 }; 46 47 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey, 48 int port, struct ib_wc *in_wc, struct ib_grh *in_grh, 49 void *in_mad, void *response_mad) 50 { 51 struct mlx4_cmd_mailbox *inmailbox, *outmailbox; 52 void *inbox; 53 int err; 54 u32 in_modifier = port; 55 u8 op_modifier = 0; 56 57 inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 58 if (IS_ERR(inmailbox)) 59 return PTR_ERR(inmailbox); 60 inbox = inmailbox->buf; 61 62 outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 63 if (IS_ERR(outmailbox)) { 64 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 65 return PTR_ERR(outmailbox); 66 } 67 68 memcpy(inbox, in_mad, 256); 69 70 /* 71 * Key check traps can't be generated unless we have in_wc to 72 * tell us where to send the trap. 73 */ 74 if (ignore_mkey || !in_wc) 75 op_modifier |= 0x1; 76 if (ignore_bkey || !in_wc) 77 op_modifier |= 0x2; 78 79 if (in_wc) { 80 struct { 81 __be32 my_qpn; 82 u32 reserved1; 83 __be32 rqpn; 84 u8 sl; 85 u8 g_path; 86 u16 reserved2[2]; 87 __be16 pkey; 88 u32 reserved3[11]; 89 u8 grh[40]; 90 } *ext_info; 91 92 memset(inbox + 256, 0, 256); 93 ext_info = inbox + 256; 94 95 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); 96 ext_info->rqpn = cpu_to_be32(in_wc->src_qp); 97 ext_info->sl = in_wc->sl << 4; 98 ext_info->g_path = in_wc->dlid_path_bits | 99 (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); 100 ext_info->pkey = cpu_to_be16(in_wc->pkey_index); 101 102 if (in_grh) 103 memcpy(ext_info->grh, in_grh, 40); 104 105 op_modifier |= 0x4; 106 107 in_modifier |= in_wc->slid << 16; 108 } 109 110 err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, 111 in_modifier, op_modifier, 112 MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C, 113 MLX4_CMD_NATIVE); 114 115 if (!err) 116 memcpy(response_mad, outmailbox->buf, 256); 117 118 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 119 mlx4_free_cmd_mailbox(dev->dev, outmailbox); 120 121 return err; 122 } 123 124 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) 125 { 126 struct ib_ah *new_ah; 127 struct ib_ah_attr ah_attr; 128 129 if (!dev->send_agent[port_num - 1][0]) 130 return; 131 132 memset(&ah_attr, 0, sizeof ah_attr); 133 ah_attr.dlid = lid; 134 ah_attr.sl = sl; 135 ah_attr.port_num = port_num; 136 137 new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, 138 &ah_attr); 139 if (IS_ERR(new_ah)) 140 return; 141 142 spin_lock(&dev->sm_lock); 143 if (dev->sm_ah[port_num - 1]) 144 ib_destroy_ah(dev->sm_ah[port_num - 1]); 145 dev->sm_ah[port_num - 1] = new_ah; 146 spin_unlock(&dev->sm_lock); 147 } 148 149 /* 150 * Snoop SM MADs for port info, GUID info, and P_Key table sets, so we can 151 * synthesize LID change, Client-Rereg, GID change, and P_Key change events. 152 */ 153 static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad, 154 u16 prev_lid) 155 { 156 struct ib_port_info *pinfo; 157 u16 lid; 158 159 struct mlx4_ib_dev *dev = to_mdev(ibdev); 160 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 161 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 162 mad->mad_hdr.method == IB_MGMT_METHOD_SET) 163 switch (mad->mad_hdr.attr_id) { 164 case IB_SMP_ATTR_PORT_INFO: 165 pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data; 166 lid = be16_to_cpu(pinfo->lid); 167 168 update_sm_ah(dev, port_num, 169 be16_to_cpu(pinfo->sm_lid), 170 pinfo->neighbormtu_mastersmsl & 0xf); 171 172 if (pinfo->clientrereg_resv_subnetto & 0x80) 173 mlx4_ib_dispatch_event(dev, port_num, 174 IB_EVENT_CLIENT_REREGISTER); 175 176 if (prev_lid != lid) 177 mlx4_ib_dispatch_event(dev, port_num, 178 IB_EVENT_LID_CHANGE); 179 break; 180 181 case IB_SMP_ATTR_PKEY_TABLE: 182 mlx4_ib_dispatch_event(dev, port_num, 183 IB_EVENT_PKEY_CHANGE); 184 break; 185 186 case IB_SMP_ATTR_GUID_INFO: 187 /* paravirtualized master's guid is guid 0 -- does not change */ 188 if (!mlx4_is_master(dev->dev)) 189 mlx4_ib_dispatch_event(dev, port_num, 190 IB_EVENT_GID_CHANGE); 191 break; 192 default: 193 break; 194 } 195 } 196 197 static void node_desc_override(struct ib_device *dev, 198 struct ib_mad *mad) 199 { 200 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 201 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 202 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && 203 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { 204 spin_lock(&to_mdev(dev)->sm_lock); 205 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); 206 spin_unlock(&to_mdev(dev)->sm_lock); 207 } 208 } 209 210 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad) 211 { 212 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; 213 struct ib_mad_send_buf *send_buf; 214 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; 215 int ret; 216 217 if (agent) { 218 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, 219 IB_MGMT_MAD_DATA, GFP_ATOMIC); 220 if (IS_ERR(send_buf)) 221 return; 222 /* 223 * We rely here on the fact that MLX QPs don't use the 224 * address handle after the send is posted (this is 225 * wrong following the IB spec strictly, but we know 226 * it's OK for our devices). 227 */ 228 spin_lock(&dev->sm_lock); 229 memcpy(send_buf->mad, mad, sizeof *mad); 230 if ((send_buf->ah = dev->sm_ah[port_num - 1])) 231 ret = ib_post_send_mad(send_buf, NULL); 232 else 233 ret = -EINVAL; 234 spin_unlock(&dev->sm_lock); 235 236 if (ret) 237 ib_free_send_mad(send_buf); 238 } 239 } 240 241 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 242 struct ib_wc *in_wc, struct ib_grh *in_grh, 243 struct ib_mad *in_mad, struct ib_mad *out_mad) 244 { 245 u16 slid, prev_lid = 0; 246 int err; 247 struct ib_port_attr pattr; 248 249 if (in_wc && in_wc->qp->qp_num) { 250 pr_debug("received MAD: slid:%d sqpn:%d " 251 "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n", 252 in_wc->slid, in_wc->src_qp, 253 in_wc->dlid_path_bits, 254 in_wc->qp->qp_num, 255 in_wc->wc_flags, 256 in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method, 257 be16_to_cpu(in_mad->mad_hdr.attr_id)); 258 if (in_wc->wc_flags & IB_WC_GRH) { 259 pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n", 260 be64_to_cpu(in_grh->sgid.global.subnet_prefix), 261 be64_to_cpu(in_grh->sgid.global.interface_id)); 262 pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n", 263 be64_to_cpu(in_grh->dgid.global.subnet_prefix), 264 be64_to_cpu(in_grh->dgid.global.interface_id)); 265 } 266 } 267 268 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); 269 270 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { 271 forward_trap(to_mdev(ibdev), port_num, in_mad); 272 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 273 } 274 275 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 276 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 277 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 278 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && 279 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) 280 return IB_MAD_RESULT_SUCCESS; 281 282 /* 283 * Don't process SMInfo queries -- the SMA can't handle them. 284 */ 285 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO) 286 return IB_MAD_RESULT_SUCCESS; 287 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || 288 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || 289 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || 290 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { 291 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 292 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) 293 return IB_MAD_RESULT_SUCCESS; 294 } else 295 return IB_MAD_RESULT_SUCCESS; 296 297 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 298 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 299 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && 300 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && 301 !ib_query_port(ibdev, port_num, &pattr)) 302 prev_lid = pattr.lid; 303 304 err = mlx4_MAD_IFC(to_mdev(ibdev), 305 mad_flags & IB_MAD_IGNORE_MKEY, 306 mad_flags & IB_MAD_IGNORE_BKEY, 307 port_num, in_wc, in_grh, in_mad, out_mad); 308 if (err) 309 return IB_MAD_RESULT_FAILURE; 310 311 if (!out_mad->mad_hdr.status) { 312 if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)) 313 smp_snoop(ibdev, port_num, in_mad, prev_lid); 314 node_desc_override(ibdev, out_mad); 315 } 316 317 /* set return bit in status of directed route responses */ 318 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 319 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); 320 321 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 322 /* no response for trap repress */ 323 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 324 325 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 326 } 327 328 static void edit_counter(struct mlx4_counter *cnt, 329 struct ib_pma_portcounters *pma_cnt) 330 { 331 pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2)); 332 pma_cnt->port_rcv_data = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2)); 333 pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames)); 334 pma_cnt->port_rcv_packets = cpu_to_be32(be64_to_cpu(cnt->rx_frames)); 335 } 336 337 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 338 struct ib_wc *in_wc, struct ib_grh *in_grh, 339 struct ib_mad *in_mad, struct ib_mad *out_mad) 340 { 341 struct mlx4_cmd_mailbox *mailbox; 342 struct mlx4_ib_dev *dev = to_mdev(ibdev); 343 int err; 344 u32 inmod = dev->counters[port_num - 1] & 0xffff; 345 u8 mode; 346 347 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) 348 return -EINVAL; 349 350 mailbox = mlx4_alloc_cmd_mailbox(dev->dev); 351 if (IS_ERR(mailbox)) 352 return IB_MAD_RESULT_FAILURE; 353 354 err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0, 355 MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C, 356 MLX4_CMD_WRAPPED); 357 if (err) 358 err = IB_MAD_RESULT_FAILURE; 359 else { 360 memset(out_mad->data, 0, sizeof out_mad->data); 361 mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode; 362 switch (mode & 0xf) { 363 case 0: 364 edit_counter(mailbox->buf, 365 (void *)(out_mad->data + 40)); 366 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 367 break; 368 default: 369 err = IB_MAD_RESULT_FAILURE; 370 } 371 } 372 373 mlx4_free_cmd_mailbox(dev->dev, mailbox); 374 375 return err; 376 } 377 378 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 379 struct ib_wc *in_wc, struct ib_grh *in_grh, 380 struct ib_mad *in_mad, struct ib_mad *out_mad) 381 { 382 switch (rdma_port_get_link_layer(ibdev, port_num)) { 383 case IB_LINK_LAYER_INFINIBAND: 384 return ib_process_mad(ibdev, mad_flags, port_num, in_wc, 385 in_grh, in_mad, out_mad); 386 case IB_LINK_LAYER_ETHERNET: 387 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, 388 in_grh, in_mad, out_mad); 389 default: 390 return -EINVAL; 391 } 392 } 393 394 static void send_handler(struct ib_mad_agent *agent, 395 struct ib_mad_send_wc *mad_send_wc) 396 { 397 ib_free_send_mad(mad_send_wc->send_buf); 398 } 399 400 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) 401 { 402 struct ib_mad_agent *agent; 403 int p, q; 404 int ret; 405 enum rdma_link_layer ll; 406 407 for (p = 0; p < dev->num_ports; ++p) { 408 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); 409 for (q = 0; q <= 1; ++q) { 410 if (ll == IB_LINK_LAYER_INFINIBAND) { 411 agent = ib_register_mad_agent(&dev->ib_dev, p + 1, 412 q ? IB_QPT_GSI : IB_QPT_SMI, 413 NULL, 0, send_handler, 414 NULL, NULL); 415 if (IS_ERR(agent)) { 416 ret = PTR_ERR(agent); 417 goto err; 418 } 419 dev->send_agent[p][q] = agent; 420 } else 421 dev->send_agent[p][q] = NULL; 422 } 423 } 424 425 return 0; 426 427 err: 428 for (p = 0; p < dev->num_ports; ++p) 429 for (q = 0; q <= 1; ++q) 430 if (dev->send_agent[p][q]) 431 ib_unregister_mad_agent(dev->send_agent[p][q]); 432 433 return ret; 434 } 435 436 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) 437 { 438 struct ib_mad_agent *agent; 439 int p, q; 440 441 for (p = 0; p < dev->num_ports; ++p) { 442 for (q = 0; q <= 1; ++q) { 443 agent = dev->send_agent[p][q]; 444 if (agent) { 445 dev->send_agent[p][q] = NULL; 446 ib_unregister_mad_agent(agent); 447 } 448 } 449 450 if (dev->sm_ah[p]) 451 ib_destroy_ah(dev->sm_ah[p]); 452 } 453 } 454 455 void handle_port_mgmt_change_event(struct work_struct *work) 456 { 457 struct ib_event_work *ew = container_of(work, struct ib_event_work, work); 458 struct mlx4_ib_dev *dev = ew->ib_dev; 459 struct mlx4_eqe *eqe = &(ew->ib_eqe); 460 u8 port = eqe->event.port_mgmt_change.port; 461 u32 changed_attr; 462 463 switch (eqe->subtype) { 464 case MLX4_DEV_PMC_SUBTYPE_PORT_INFO: 465 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr); 466 467 /* Update the SM ah - This should be done before handling 468 the other changed attributes so that MADs can be sent to the SM */ 469 if (changed_attr & MSTR_SM_CHANGE_MASK) { 470 u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid); 471 u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf; 472 update_sm_ah(dev, port, lid, sl); 473 } 474 475 /* Check if it is a lid change event */ 476 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK) 477 mlx4_ib_dispatch_event(dev, port, IB_EVENT_LID_CHANGE); 478 479 /* Generate GUID changed event */ 480 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) 481 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 482 483 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK) 484 mlx4_ib_dispatch_event(dev, port, 485 IB_EVENT_CLIENT_REREGISTER); 486 break; 487 488 case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE: 489 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE); 490 break; 491 case MLX4_DEV_PMC_SUBTYPE_GUID_INFO: 492 /* paravirtualized master's guid is guid 0 -- does not change */ 493 if (!mlx4_is_master(dev->dev)) 494 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 495 break; 496 default: 497 pr_warn("Unsupported subtype 0x%x for " 498 "Port Management Change event\n", eqe->subtype); 499 } 500 501 kfree(ew); 502 } 503 504 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num, 505 enum ib_event_type type) 506 { 507 struct ib_event event; 508 509 event.device = &dev->ib_dev; 510 event.element.port_num = port_num; 511 event.event = type; 512 513 ib_dispatch_event(&event); 514 } 515