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 and P_Key table sets, so we can 151 * synthesize LID 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_event event; 157 158 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 159 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 160 mad->mad_hdr.method == IB_MGMT_METHOD_SET) { 161 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { 162 struct ib_port_info *pinfo = 163 (struct ib_port_info *) ((struct ib_smp *) mad)->data; 164 u16 lid = be16_to_cpu(pinfo->lid); 165 166 update_sm_ah(to_mdev(ibdev), port_num, 167 be16_to_cpu(pinfo->sm_lid), 168 pinfo->neighbormtu_mastersmsl & 0xf); 169 170 event.device = ibdev; 171 event.element.port_num = port_num; 172 173 if (pinfo->clientrereg_resv_subnetto & 0x80) { 174 event.event = IB_EVENT_CLIENT_REREGISTER; 175 ib_dispatch_event(&event); 176 } 177 178 if (prev_lid != lid) { 179 event.event = IB_EVENT_LID_CHANGE; 180 ib_dispatch_event(&event); 181 } 182 } 183 184 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { 185 event.device = ibdev; 186 event.event = IB_EVENT_PKEY_CHANGE; 187 event.element.port_num = port_num; 188 ib_dispatch_event(&event); 189 } 190 } 191 } 192 193 static void node_desc_override(struct ib_device *dev, 194 struct ib_mad *mad) 195 { 196 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 197 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 198 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && 199 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { 200 spin_lock(&to_mdev(dev)->sm_lock); 201 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); 202 spin_unlock(&to_mdev(dev)->sm_lock); 203 } 204 } 205 206 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad) 207 { 208 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; 209 struct ib_mad_send_buf *send_buf; 210 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; 211 int ret; 212 213 if (agent) { 214 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, 215 IB_MGMT_MAD_DATA, GFP_ATOMIC); 216 if (IS_ERR(send_buf)) 217 return; 218 /* 219 * We rely here on the fact that MLX QPs don't use the 220 * address handle after the send is posted (this is 221 * wrong following the IB spec strictly, but we know 222 * it's OK for our devices). 223 */ 224 spin_lock(&dev->sm_lock); 225 memcpy(send_buf->mad, mad, sizeof *mad); 226 if ((send_buf->ah = dev->sm_ah[port_num - 1])) 227 ret = ib_post_send_mad(send_buf, NULL); 228 else 229 ret = -EINVAL; 230 spin_unlock(&dev->sm_lock); 231 232 if (ret) 233 ib_free_send_mad(send_buf); 234 } 235 } 236 237 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 238 struct ib_wc *in_wc, struct ib_grh *in_grh, 239 struct ib_mad *in_mad, struct ib_mad *out_mad) 240 { 241 u16 slid, prev_lid = 0; 242 int err; 243 struct ib_port_attr pattr; 244 245 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); 246 247 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { 248 forward_trap(to_mdev(ibdev), port_num, in_mad); 249 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 250 } 251 252 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 253 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 254 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 255 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && 256 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) 257 return IB_MAD_RESULT_SUCCESS; 258 259 /* 260 * Don't process SMInfo queries or vendor-specific 261 * MADs -- the SMA can't handle them. 262 */ 263 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO || 264 ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) == 265 IB_SMP_ATTR_VENDOR_MASK)) 266 return IB_MAD_RESULT_SUCCESS; 267 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || 268 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || 269 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || 270 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { 271 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 272 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) 273 return IB_MAD_RESULT_SUCCESS; 274 } else 275 return IB_MAD_RESULT_SUCCESS; 276 277 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 278 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 279 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && 280 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && 281 !ib_query_port(ibdev, port_num, &pattr)) 282 prev_lid = pattr.lid; 283 284 err = mlx4_MAD_IFC(to_mdev(ibdev), 285 mad_flags & IB_MAD_IGNORE_MKEY, 286 mad_flags & IB_MAD_IGNORE_BKEY, 287 port_num, in_wc, in_grh, in_mad, out_mad); 288 if (err) 289 return IB_MAD_RESULT_FAILURE; 290 291 if (!out_mad->mad_hdr.status) { 292 smp_snoop(ibdev, port_num, in_mad, prev_lid); 293 node_desc_override(ibdev, out_mad); 294 } 295 296 /* set return bit in status of directed route responses */ 297 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 298 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); 299 300 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 301 /* no response for trap repress */ 302 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 303 304 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 305 } 306 307 static void edit_counter(struct mlx4_counter *cnt, 308 struct ib_pma_portcounters *pma_cnt) 309 { 310 pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2)); 311 pma_cnt->port_rcv_data = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2)); 312 pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames)); 313 pma_cnt->port_rcv_packets = cpu_to_be32(be64_to_cpu(cnt->rx_frames)); 314 } 315 316 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 317 struct ib_wc *in_wc, struct ib_grh *in_grh, 318 struct ib_mad *in_mad, struct ib_mad *out_mad) 319 { 320 struct mlx4_cmd_mailbox *mailbox; 321 struct mlx4_ib_dev *dev = to_mdev(ibdev); 322 int err; 323 u32 inmod = dev->counters[port_num - 1] & 0xffff; 324 u8 mode; 325 326 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) 327 return -EINVAL; 328 329 mailbox = mlx4_alloc_cmd_mailbox(dev->dev); 330 if (IS_ERR(mailbox)) 331 return IB_MAD_RESULT_FAILURE; 332 333 err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0, 334 MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C, 335 MLX4_CMD_WRAPPED); 336 if (err) 337 err = IB_MAD_RESULT_FAILURE; 338 else { 339 memset(out_mad->data, 0, sizeof out_mad->data); 340 mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode; 341 switch (mode & 0xf) { 342 case 0: 343 edit_counter(mailbox->buf, 344 (void *)(out_mad->data + 40)); 345 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 346 break; 347 default: 348 err = IB_MAD_RESULT_FAILURE; 349 } 350 } 351 352 mlx4_free_cmd_mailbox(dev->dev, mailbox); 353 354 return err; 355 } 356 357 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 358 struct ib_wc *in_wc, struct ib_grh *in_grh, 359 struct ib_mad *in_mad, struct ib_mad *out_mad) 360 { 361 switch (rdma_port_get_link_layer(ibdev, port_num)) { 362 case IB_LINK_LAYER_INFINIBAND: 363 return ib_process_mad(ibdev, mad_flags, port_num, in_wc, 364 in_grh, in_mad, out_mad); 365 case IB_LINK_LAYER_ETHERNET: 366 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, 367 in_grh, in_mad, out_mad); 368 default: 369 return -EINVAL; 370 } 371 } 372 373 static void send_handler(struct ib_mad_agent *agent, 374 struct ib_mad_send_wc *mad_send_wc) 375 { 376 ib_free_send_mad(mad_send_wc->send_buf); 377 } 378 379 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) 380 { 381 struct ib_mad_agent *agent; 382 int p, q; 383 int ret; 384 enum rdma_link_layer ll; 385 386 for (p = 0; p < dev->num_ports; ++p) { 387 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); 388 for (q = 0; q <= 1; ++q) { 389 if (ll == IB_LINK_LAYER_INFINIBAND) { 390 agent = ib_register_mad_agent(&dev->ib_dev, p + 1, 391 q ? IB_QPT_GSI : IB_QPT_SMI, 392 NULL, 0, send_handler, 393 NULL, NULL); 394 if (IS_ERR(agent)) { 395 ret = PTR_ERR(agent); 396 goto err; 397 } 398 dev->send_agent[p][q] = agent; 399 } else 400 dev->send_agent[p][q] = NULL; 401 } 402 } 403 404 return 0; 405 406 err: 407 for (p = 0; p < dev->num_ports; ++p) 408 for (q = 0; q <= 1; ++q) 409 if (dev->send_agent[p][q]) 410 ib_unregister_mad_agent(dev->send_agent[p][q]); 411 412 return ret; 413 } 414 415 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) 416 { 417 struct ib_mad_agent *agent; 418 int p, q; 419 420 for (p = 0; p < dev->num_ports; ++p) { 421 for (q = 0; q <= 1; ++q) { 422 agent = dev->send_agent[p][q]; 423 if (agent) { 424 dev->send_agent[p][q] = NULL; 425 ib_unregister_mad_agent(agent); 426 } 427 } 428 429 if (dev->sm_ah[p]) 430 ib_destroy_ah(dev->sm_ah[p]); 431 } 432 } 433