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); 113 114 if (!err) 115 memcpy(response_mad, outmailbox->buf, 256); 116 117 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 118 mlx4_free_cmd_mailbox(dev->dev, outmailbox); 119 120 return err; 121 } 122 123 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) 124 { 125 struct ib_ah *new_ah; 126 struct ib_ah_attr ah_attr; 127 128 if (!dev->send_agent[port_num - 1][0]) 129 return; 130 131 memset(&ah_attr, 0, sizeof ah_attr); 132 ah_attr.dlid = lid; 133 ah_attr.sl = sl; 134 ah_attr.port_num = port_num; 135 136 new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, 137 &ah_attr); 138 if (IS_ERR(new_ah)) 139 return; 140 141 spin_lock(&dev->sm_lock); 142 if (dev->sm_ah[port_num - 1]) 143 ib_destroy_ah(dev->sm_ah[port_num - 1]); 144 dev->sm_ah[port_num - 1] = new_ah; 145 spin_unlock(&dev->sm_lock); 146 } 147 148 /* 149 * Snoop SM MADs for port info and P_Key table sets, so we can 150 * synthesize LID change and P_Key change events. 151 */ 152 static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad, 153 u16 prev_lid) 154 { 155 struct ib_event event; 156 157 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 158 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 159 mad->mad_hdr.method == IB_MGMT_METHOD_SET) { 160 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { 161 struct ib_port_info *pinfo = 162 (struct ib_port_info *) ((struct ib_smp *) mad)->data; 163 u16 lid = be16_to_cpu(pinfo->lid); 164 165 update_sm_ah(to_mdev(ibdev), port_num, 166 be16_to_cpu(pinfo->sm_lid), 167 pinfo->neighbormtu_mastersmsl & 0xf); 168 169 event.device = ibdev; 170 event.element.port_num = port_num; 171 172 if (pinfo->clientrereg_resv_subnetto & 0x80) { 173 event.event = IB_EVENT_CLIENT_REREGISTER; 174 ib_dispatch_event(&event); 175 } 176 177 if (prev_lid != lid) { 178 event.event = IB_EVENT_LID_CHANGE; 179 ib_dispatch_event(&event); 180 } 181 } 182 183 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { 184 event.device = ibdev; 185 event.event = IB_EVENT_PKEY_CHANGE; 186 event.element.port_num = port_num; 187 ib_dispatch_event(&event); 188 } 189 } 190 } 191 192 static void node_desc_override(struct ib_device *dev, 193 struct ib_mad *mad) 194 { 195 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 196 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 197 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && 198 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { 199 spin_lock(&to_mdev(dev)->sm_lock); 200 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); 201 spin_unlock(&to_mdev(dev)->sm_lock); 202 } 203 } 204 205 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad) 206 { 207 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; 208 struct ib_mad_send_buf *send_buf; 209 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; 210 int ret; 211 212 if (agent) { 213 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, 214 IB_MGMT_MAD_DATA, GFP_ATOMIC); 215 if (IS_ERR(send_buf)) 216 return; 217 /* 218 * We rely here on the fact that MLX QPs don't use the 219 * address handle after the send is posted (this is 220 * wrong following the IB spec strictly, but we know 221 * it's OK for our devices). 222 */ 223 spin_lock(&dev->sm_lock); 224 memcpy(send_buf->mad, mad, sizeof *mad); 225 if ((send_buf->ah = dev->sm_ah[port_num - 1])) 226 ret = ib_post_send_mad(send_buf, NULL); 227 else 228 ret = -EINVAL; 229 spin_unlock(&dev->sm_lock); 230 231 if (ret) 232 ib_free_send_mad(send_buf); 233 } 234 } 235 236 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 237 struct ib_wc *in_wc, struct ib_grh *in_grh, 238 struct ib_mad *in_mad, struct ib_mad *out_mad) 239 { 240 u16 slid, prev_lid = 0; 241 int err; 242 struct ib_port_attr pattr; 243 244 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); 245 246 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { 247 forward_trap(to_mdev(ibdev), port_num, in_mad); 248 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 249 } 250 251 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 252 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 253 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 254 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && 255 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) 256 return IB_MAD_RESULT_SUCCESS; 257 258 /* 259 * Don't process SMInfo queries or vendor-specific 260 * MADs -- the SMA can't handle them. 261 */ 262 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || 263 ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == 264 IB_SMP_ATTR_VENDOR_MASK)) 265 return IB_MAD_RESULT_SUCCESS; 266 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || 267 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || 268 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || 269 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { 270 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 271 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) 272 return IB_MAD_RESULT_SUCCESS; 273 } else 274 return IB_MAD_RESULT_SUCCESS; 275 276 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 277 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 278 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && 279 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && 280 !ib_query_port(ibdev, port_num, &pattr)) 281 prev_lid = pattr.lid; 282 283 err = mlx4_MAD_IFC(to_mdev(ibdev), 284 mad_flags & IB_MAD_IGNORE_MKEY, 285 mad_flags & IB_MAD_IGNORE_BKEY, 286 port_num, in_wc, in_grh, in_mad, out_mad); 287 if (err) 288 return IB_MAD_RESULT_FAILURE; 289 290 if (!out_mad->mad_hdr.status) { 291 smp_snoop(ibdev, port_num, in_mad, prev_lid); 292 node_desc_override(ibdev, out_mad); 293 } 294 295 /* set return bit in status of directed route responses */ 296 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 297 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); 298 299 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 300 /* no response for trap repress */ 301 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 302 303 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 304 } 305 306 static void edit_counter(struct mlx4_counter *cnt, 307 struct ib_pma_portcounters *pma_cnt) 308 { 309 pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2)); 310 pma_cnt->port_rcv_data = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2)); 311 pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames)); 312 pma_cnt->port_rcv_packets = cpu_to_be32(be64_to_cpu(cnt->rx_frames)); 313 } 314 315 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 316 struct ib_wc *in_wc, struct ib_grh *in_grh, 317 struct ib_mad *in_mad, struct ib_mad *out_mad) 318 { 319 struct mlx4_cmd_mailbox *mailbox; 320 struct mlx4_ib_dev *dev = to_mdev(ibdev); 321 int err; 322 u32 inmod = dev->counters[port_num - 1] & 0xffff; 323 u8 mode; 324 325 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) 326 return -EINVAL; 327 328 mailbox = mlx4_alloc_cmd_mailbox(dev->dev); 329 if (IS_ERR(mailbox)) 330 return IB_MAD_RESULT_FAILURE; 331 332 err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0, 333 MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C); 334 if (err) 335 err = IB_MAD_RESULT_FAILURE; 336 else { 337 memset(out_mad->data, 0, sizeof out_mad->data); 338 mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode; 339 switch (mode & 0xf) { 340 case 0: 341 edit_counter(mailbox->buf, 342 (void *)(out_mad->data + 40)); 343 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 344 break; 345 default: 346 err = IB_MAD_RESULT_FAILURE; 347 } 348 } 349 350 mlx4_free_cmd_mailbox(dev->dev, mailbox); 351 352 return err; 353 } 354 355 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 356 struct ib_wc *in_wc, struct ib_grh *in_grh, 357 struct ib_mad *in_mad, struct ib_mad *out_mad) 358 { 359 switch (rdma_port_get_link_layer(ibdev, port_num)) { 360 case IB_LINK_LAYER_INFINIBAND: 361 return ib_process_mad(ibdev, mad_flags, port_num, in_wc, 362 in_grh, in_mad, out_mad); 363 case IB_LINK_LAYER_ETHERNET: 364 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, 365 in_grh, in_mad, out_mad); 366 default: 367 return -EINVAL; 368 } 369 } 370 371 static void send_handler(struct ib_mad_agent *agent, 372 struct ib_mad_send_wc *mad_send_wc) 373 { 374 ib_free_send_mad(mad_send_wc->send_buf); 375 } 376 377 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) 378 { 379 struct ib_mad_agent *agent; 380 int p, q; 381 int ret; 382 enum rdma_link_layer ll; 383 384 for (p = 0; p < dev->num_ports; ++p) { 385 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); 386 for (q = 0; q <= 1; ++q) { 387 if (ll == IB_LINK_LAYER_INFINIBAND) { 388 agent = ib_register_mad_agent(&dev->ib_dev, p + 1, 389 q ? IB_QPT_GSI : IB_QPT_SMI, 390 NULL, 0, send_handler, 391 NULL, NULL); 392 if (IS_ERR(agent)) { 393 ret = PTR_ERR(agent); 394 goto err; 395 } 396 dev->send_agent[p][q] = agent; 397 } else 398 dev->send_agent[p][q] = NULL; 399 } 400 } 401 402 return 0; 403 404 err: 405 for (p = 0; p < dev->num_ports; ++p) 406 for (q = 0; q <= 1; ++q) 407 if (dev->send_agent[p][q]) 408 ib_unregister_mad_agent(dev->send_agent[p][q]); 409 410 return ret; 411 } 412 413 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) 414 { 415 struct ib_mad_agent *agent; 416 int p, q; 417 418 for (p = 0; p < dev->num_ports; ++p) { 419 for (q = 0; q <= 1; ++q) { 420 agent = dev->send_agent[p][q]; 421 if (agent) { 422 dev->send_agent[p][q] = NULL; 423 ib_unregister_mad_agent(agent); 424 } 425 } 426 427 if (dev->sm_ah[p]) 428 ib_destroy_ah(dev->sm_ah[p]); 429 } 430 } 431