1 /* 2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved. 4 * Copyright (c) 2004 Intel Corporation. All rights reserved. 5 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved. 7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. 9 * 10 * This software is available to you under a choice of one of two 11 * licenses. You may choose to be licensed under the terms of the GNU 12 * General Public License (GPL) Version 2, available from the file 13 * COPYING in the main directory of this source tree, or the 14 * OpenIB.org BSD license below: 15 * 16 * Redistribution and use in source and binary forms, with or 17 * without modification, are permitted provided that the following 18 * conditions are met: 19 * 20 * - Redistributions of source code must retain the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer. 23 * 24 * - Redistributions in binary form must reproduce the above 25 * copyright notice, this list of conditions and the following 26 * disclaimer in the documentation and/or other materials 27 * provided with the distribution. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 36 * SOFTWARE. 37 */ 38 39 #include <linux/errno.h> 40 #include <linux/err.h> 41 #include <linux/export.h> 42 #include <linux/string.h> 43 #include <linux/slab.h> 44 #include <linux/in.h> 45 #include <linux/in6.h> 46 #include <net/addrconf.h> 47 #include <linux/security.h> 48 49 #include <rdma/ib_verbs.h> 50 #include <rdma/ib_cache.h> 51 #include <rdma/ib_addr.h> 52 #include <rdma/ib_umem.h> 53 #include <rdma/rw.h> 54 #include <rdma/lag.h> 55 56 #include "rdma_core.h" 57 #include "core_priv.h" 58 #include <trace/events/rdma_core.h> 59 60 static int ib_resolve_eth_dmac(struct ib_device *device, 61 struct rdma_ah_attr *ah_attr); 62 63 static const char * const ib_events[] = { 64 [IB_EVENT_CQ_ERR] = "CQ error", 65 [IB_EVENT_QP_FATAL] = "QP fatal error", 66 [IB_EVENT_QP_REQ_ERR] = "QP request error", 67 [IB_EVENT_QP_ACCESS_ERR] = "QP access error", 68 [IB_EVENT_COMM_EST] = "communication established", 69 [IB_EVENT_SQ_DRAINED] = "send queue drained", 70 [IB_EVENT_PATH_MIG] = "path migration successful", 71 [IB_EVENT_PATH_MIG_ERR] = "path migration error", 72 [IB_EVENT_DEVICE_FATAL] = "device fatal error", 73 [IB_EVENT_PORT_ACTIVE] = "port active", 74 [IB_EVENT_PORT_ERR] = "port error", 75 [IB_EVENT_LID_CHANGE] = "LID change", 76 [IB_EVENT_PKEY_CHANGE] = "P_key change", 77 [IB_EVENT_SM_CHANGE] = "SM change", 78 [IB_EVENT_SRQ_ERR] = "SRQ error", 79 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached", 80 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached", 81 [IB_EVENT_CLIENT_REREGISTER] = "client reregister", 82 [IB_EVENT_GID_CHANGE] = "GID changed", 83 [IB_EVENT_DEVICE_SPEED_CHANGE] = "device speed change" 84 }; 85 86 const char *__attribute_const__ ib_event_msg(enum ib_event_type event) 87 { 88 size_t index = event; 89 90 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ? 91 ib_events[index] : "unrecognized event"; 92 } 93 EXPORT_SYMBOL(ib_event_msg); 94 95 static const char * const wc_statuses[] = { 96 [IB_WC_SUCCESS] = "success", 97 [IB_WC_LOC_LEN_ERR] = "local length error", 98 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error", 99 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error", 100 [IB_WC_LOC_PROT_ERR] = "local protection error", 101 [IB_WC_WR_FLUSH_ERR] = "WR flushed", 102 [IB_WC_MW_BIND_ERR] = "memory bind operation error", 103 [IB_WC_BAD_RESP_ERR] = "bad response error", 104 [IB_WC_LOC_ACCESS_ERR] = "local access error", 105 [IB_WC_REM_INV_REQ_ERR] = "remote invalid request error", 106 [IB_WC_REM_ACCESS_ERR] = "remote access error", 107 [IB_WC_REM_OP_ERR] = "remote operation error", 108 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded", 109 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded", 110 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error", 111 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request", 112 [IB_WC_REM_ABORT_ERR] = "operation aborted", 113 [IB_WC_INV_EECN_ERR] = "invalid EE context number", 114 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state", 115 [IB_WC_FATAL_ERR] = "fatal error", 116 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error", 117 [IB_WC_GENERAL_ERR] = "general error", 118 }; 119 120 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status) 121 { 122 size_t index = status; 123 124 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ? 125 wc_statuses[index] : "unrecognized status"; 126 } 127 EXPORT_SYMBOL(ib_wc_status_msg); 128 129 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate) 130 { 131 switch (rate) { 132 case IB_RATE_2_5_GBPS: return 1; 133 case IB_RATE_5_GBPS: return 2; 134 case IB_RATE_10_GBPS: return 4; 135 case IB_RATE_20_GBPS: return 8; 136 case IB_RATE_30_GBPS: return 12; 137 case IB_RATE_40_GBPS: return 16; 138 case IB_RATE_60_GBPS: return 24; 139 case IB_RATE_80_GBPS: return 32; 140 case IB_RATE_120_GBPS: return 48; 141 case IB_RATE_14_GBPS: return 6; 142 case IB_RATE_56_GBPS: return 22; 143 case IB_RATE_112_GBPS: return 45; 144 case IB_RATE_168_GBPS: return 67; 145 case IB_RATE_25_GBPS: return 10; 146 case IB_RATE_100_GBPS: return 40; 147 case IB_RATE_200_GBPS: return 80; 148 case IB_RATE_300_GBPS: return 120; 149 case IB_RATE_28_GBPS: return 11; 150 case IB_RATE_50_GBPS: return 20; 151 case IB_RATE_400_GBPS: return 160; 152 case IB_RATE_600_GBPS: return 240; 153 case IB_RATE_800_GBPS: return 320; 154 case IB_RATE_1600_GBPS: return 640; 155 default: return -1; 156 } 157 } 158 EXPORT_SYMBOL(ib_rate_to_mult); 159 160 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult) 161 { 162 switch (mult) { 163 case 1: return IB_RATE_2_5_GBPS; 164 case 2: return IB_RATE_5_GBPS; 165 case 4: return IB_RATE_10_GBPS; 166 case 8: return IB_RATE_20_GBPS; 167 case 12: return IB_RATE_30_GBPS; 168 case 16: return IB_RATE_40_GBPS; 169 case 24: return IB_RATE_60_GBPS; 170 case 32: return IB_RATE_80_GBPS; 171 case 48: return IB_RATE_120_GBPS; 172 case 6: return IB_RATE_14_GBPS; 173 case 22: return IB_RATE_56_GBPS; 174 case 45: return IB_RATE_112_GBPS; 175 case 67: return IB_RATE_168_GBPS; 176 case 10: return IB_RATE_25_GBPS; 177 case 40: return IB_RATE_100_GBPS; 178 case 80: return IB_RATE_200_GBPS; 179 case 120: return IB_RATE_300_GBPS; 180 case 11: return IB_RATE_28_GBPS; 181 case 20: return IB_RATE_50_GBPS; 182 case 160: return IB_RATE_400_GBPS; 183 case 240: return IB_RATE_600_GBPS; 184 case 320: return IB_RATE_800_GBPS; 185 case 640: return IB_RATE_1600_GBPS; 186 default: return IB_RATE_PORT_CURRENT; 187 } 188 } 189 EXPORT_SYMBOL(mult_to_ib_rate); 190 191 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate) 192 { 193 switch (rate) { 194 case IB_RATE_2_5_GBPS: return 2500; 195 case IB_RATE_5_GBPS: return 5000; 196 case IB_RATE_10_GBPS: return 10000; 197 case IB_RATE_20_GBPS: return 20000; 198 case IB_RATE_30_GBPS: return 30000; 199 case IB_RATE_40_GBPS: return 40000; 200 case IB_RATE_60_GBPS: return 60000; 201 case IB_RATE_80_GBPS: return 80000; 202 case IB_RATE_120_GBPS: return 120000; 203 case IB_RATE_14_GBPS: return 14062; 204 case IB_RATE_56_GBPS: return 56250; 205 case IB_RATE_112_GBPS: return 112500; 206 case IB_RATE_168_GBPS: return 168750; 207 case IB_RATE_25_GBPS: return 25781; 208 case IB_RATE_100_GBPS: return 103125; 209 case IB_RATE_200_GBPS: return 206250; 210 case IB_RATE_300_GBPS: return 309375; 211 case IB_RATE_28_GBPS: return 28125; 212 case IB_RATE_50_GBPS: return 53125; 213 case IB_RATE_400_GBPS: return 425000; 214 case IB_RATE_600_GBPS: return 637500; 215 case IB_RATE_800_GBPS: return 850000; 216 case IB_RATE_1600_GBPS: return 1700000; 217 default: return -1; 218 } 219 } 220 EXPORT_SYMBOL(ib_rate_to_mbps); 221 222 struct ib_speed_attr { 223 const char *str; 224 int speed; 225 }; 226 227 #define IB_SPEED_ATTR(speed_type, _str, _speed) \ 228 [speed_type] = {.str = _str, .speed = _speed} 229 230 static const struct ib_speed_attr ib_speed_attrs[] = { 231 IB_SPEED_ATTR(IB_SPEED_SDR, " SDR", 25), 232 IB_SPEED_ATTR(IB_SPEED_DDR, " DDR", 50), 233 IB_SPEED_ATTR(IB_SPEED_QDR, " QDR", 100), 234 IB_SPEED_ATTR(IB_SPEED_FDR10, " FDR10", 100), 235 IB_SPEED_ATTR(IB_SPEED_FDR, " FDR", 140), 236 IB_SPEED_ATTR(IB_SPEED_EDR, " EDR", 250), 237 IB_SPEED_ATTR(IB_SPEED_HDR, " HDR", 500), 238 IB_SPEED_ATTR(IB_SPEED_NDR, " NDR", 1000), 239 IB_SPEED_ATTR(IB_SPEED_XDR, " XDR", 2000), 240 }; 241 242 int ib_port_attr_to_speed_info(struct ib_port_attr *attr, 243 struct ib_port_speed_info *speed_info) 244 { 245 int speed_idx = attr->active_speed; 246 247 switch (attr->active_speed) { 248 case IB_SPEED_DDR: 249 case IB_SPEED_QDR: 250 case IB_SPEED_FDR10: 251 case IB_SPEED_FDR: 252 case IB_SPEED_EDR: 253 case IB_SPEED_HDR: 254 case IB_SPEED_NDR: 255 case IB_SPEED_XDR: 256 case IB_SPEED_SDR: 257 break; 258 default: 259 speed_idx = IB_SPEED_SDR; /* Default to SDR for invalid rates */ 260 break; 261 } 262 263 speed_info->str = ib_speed_attrs[speed_idx].str; 264 speed_info->rate = ib_speed_attrs[speed_idx].speed; 265 speed_info->rate *= ib_width_enum_to_int(attr->active_width); 266 if (speed_info->rate < 0) 267 return -EINVAL; 268 269 return 0; 270 } 271 EXPORT_SYMBOL(ib_port_attr_to_speed_info); 272 273 __attribute_const__ enum rdma_transport_type 274 rdma_node_get_transport(unsigned int node_type) 275 { 276 277 if (node_type == RDMA_NODE_USNIC) 278 return RDMA_TRANSPORT_USNIC; 279 if (node_type == RDMA_NODE_USNIC_UDP) 280 return RDMA_TRANSPORT_USNIC_UDP; 281 if (node_type == RDMA_NODE_RNIC) 282 return RDMA_TRANSPORT_IWARP; 283 if (node_type == RDMA_NODE_UNSPECIFIED) 284 return RDMA_TRANSPORT_UNSPECIFIED; 285 286 return RDMA_TRANSPORT_IB; 287 } 288 EXPORT_SYMBOL(rdma_node_get_transport); 289 290 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, 291 u32 port_num) 292 { 293 enum rdma_transport_type lt; 294 if (device->ops.get_link_layer) 295 return device->ops.get_link_layer(device, port_num); 296 297 lt = rdma_node_get_transport(device->node_type); 298 if (lt == RDMA_TRANSPORT_IB) 299 return IB_LINK_LAYER_INFINIBAND; 300 301 return IB_LINK_LAYER_ETHERNET; 302 } 303 EXPORT_SYMBOL(rdma_port_get_link_layer); 304 305 /* Protection domains */ 306 307 /** 308 * __ib_alloc_pd - Allocates an unused protection domain. 309 * @device: The device on which to allocate the protection domain. 310 * @flags: protection domain flags 311 * @caller: caller's build-time module name 312 * 313 * A protection domain object provides an association between QPs, shared 314 * receive queues, address handles, memory regions, and memory windows. 315 * 316 * Every PD has a local_dma_lkey which can be used as the lkey value for local 317 * memory operations. 318 */ 319 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 320 const char *caller) 321 { 322 struct ib_pd *pd; 323 int mr_access_flags = 0; 324 int ret; 325 326 pd = rdma_zalloc_drv_obj(device, ib_pd); 327 if (!pd) 328 return ERR_PTR(-ENOMEM); 329 330 pd->device = device; 331 pd->flags = flags; 332 333 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD); 334 rdma_restrack_set_name(&pd->res, caller); 335 336 ret = device->ops.alloc_pd(pd, NULL); 337 if (ret) { 338 rdma_restrack_put(&pd->res); 339 kfree(pd); 340 return ERR_PTR(ret); 341 } 342 rdma_restrack_add(&pd->res); 343 344 if (device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY) 345 pd->local_dma_lkey = device->local_dma_lkey; 346 else 347 mr_access_flags |= IB_ACCESS_LOCAL_WRITE; 348 349 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) { 350 pr_warn("%s: enabling unsafe global rkey\n", caller); 351 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE; 352 } 353 354 if (mr_access_flags) { 355 struct ib_mr *mr; 356 357 mr = pd->device->ops.get_dma_mr(pd, mr_access_flags); 358 if (IS_ERR(mr)) { 359 ib_dealloc_pd(pd); 360 return ERR_CAST(mr); 361 } 362 363 mr->device = pd->device; 364 mr->pd = pd; 365 mr->type = IB_MR_TYPE_DMA; 366 mr->uobject = NULL; 367 mr->need_inval = false; 368 369 pd->__internal_mr = mr; 370 371 if (!(device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY)) 372 pd->local_dma_lkey = pd->__internal_mr->lkey; 373 374 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) 375 pd->unsafe_global_rkey = pd->__internal_mr->rkey; 376 } 377 378 return pd; 379 } 380 EXPORT_SYMBOL(__ib_alloc_pd); 381 382 /** 383 * ib_dealloc_pd_user - Deallocates a protection domain. 384 * @pd: The protection domain to deallocate. 385 * @udata: Valid user data or NULL for kernel object 386 * 387 * It is an error to call this function while any resources in the pd still 388 * exist. The caller is responsible to synchronously destroy them and 389 * guarantee no new allocations will happen. 390 */ 391 int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata) 392 { 393 int ret; 394 395 rdma_restrack_begin_del(&pd->res); 396 if (pd->__internal_mr) { 397 ret = pd->device->ops.dereg_mr(pd->__internal_mr, NULL); 398 WARN_ON(ret); 399 pd->__internal_mr = NULL; 400 } 401 402 ret = pd->device->ops.dealloc_pd(pd, udata); 403 if (ret) { 404 rdma_restrack_abort_del(&pd->res); 405 return ret; 406 } 407 408 rdma_restrack_commit_del(&pd->res); 409 kfree(pd); 410 return ret; 411 } 412 EXPORT_SYMBOL(ib_dealloc_pd_user); 413 414 /* Address handles */ 415 416 /** 417 * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination. 418 * @dest: Pointer to destination ah_attr. Contents of the destination 419 * pointer is assumed to be invalid and attribute are overwritten. 420 * @src: Pointer to source ah_attr. 421 */ 422 void rdma_copy_ah_attr(struct rdma_ah_attr *dest, 423 const struct rdma_ah_attr *src) 424 { 425 *dest = *src; 426 if (dest->grh.sgid_attr) 427 rdma_hold_gid_attr(dest->grh.sgid_attr); 428 } 429 EXPORT_SYMBOL(rdma_copy_ah_attr); 430 431 /** 432 * rdma_replace_ah_attr - Replace valid ah_attr with new one. 433 * @old: Pointer to existing ah_attr which needs to be replaced. 434 * old is assumed to be valid or zero'd 435 * @new: Pointer to the new ah_attr. 436 * 437 * rdma_replace_ah_attr() first releases any reference in the old ah_attr if 438 * old the ah_attr is valid; after that it copies the new attribute and holds 439 * the reference to the replaced ah_attr. 440 */ 441 void rdma_replace_ah_attr(struct rdma_ah_attr *old, 442 const struct rdma_ah_attr *new) 443 { 444 rdma_destroy_ah_attr(old); 445 *old = *new; 446 if (old->grh.sgid_attr) 447 rdma_hold_gid_attr(old->grh.sgid_attr); 448 } 449 EXPORT_SYMBOL(rdma_replace_ah_attr); 450 451 /** 452 * rdma_move_ah_attr - Move ah_attr pointed by source to destination. 453 * @dest: Pointer to destination ah_attr to copy to. 454 * dest is assumed to be valid or zero'd 455 * @src: Pointer to the new ah_attr. 456 * 457 * rdma_move_ah_attr() first releases any reference in the destination ah_attr 458 * if it is valid. This also transfers ownership of internal references from 459 * src to dest, making src invalid in the process. No new reference of the src 460 * ah_attr is taken. 461 */ 462 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src) 463 { 464 rdma_destroy_ah_attr(dest); 465 *dest = *src; 466 src->grh.sgid_attr = NULL; 467 } 468 EXPORT_SYMBOL(rdma_move_ah_attr); 469 470 /* 471 * Validate that the rdma_ah_attr is valid for the device before passing it 472 * off to the driver. 473 */ 474 static int rdma_check_ah_attr(struct ib_device *device, 475 struct rdma_ah_attr *ah_attr) 476 { 477 if (!rdma_is_port_valid(device, ah_attr->port_num)) 478 return -EINVAL; 479 480 if ((rdma_is_grh_required(device, ah_attr->port_num) || 481 ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) && 482 !(ah_attr->ah_flags & IB_AH_GRH)) 483 return -EINVAL; 484 485 if (ah_attr->grh.sgid_attr) { 486 /* 487 * Make sure the passed sgid_attr is consistent with the 488 * parameters 489 */ 490 if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index || 491 ah_attr->grh.sgid_attr->port_num != ah_attr->port_num) 492 return -EINVAL; 493 } 494 return 0; 495 } 496 497 /* 498 * If the ah requires a GRH then ensure that sgid_attr pointer is filled in. 499 * On success the caller is responsible to call rdma_unfill_sgid_attr(). 500 */ 501 static int rdma_fill_sgid_attr(struct ib_device *device, 502 struct rdma_ah_attr *ah_attr, 503 const struct ib_gid_attr **old_sgid_attr) 504 { 505 const struct ib_gid_attr *sgid_attr; 506 struct ib_global_route *grh; 507 int ret; 508 509 *old_sgid_attr = ah_attr->grh.sgid_attr; 510 511 ret = rdma_check_ah_attr(device, ah_attr); 512 if (ret) 513 return ret; 514 515 if (!(ah_attr->ah_flags & IB_AH_GRH)) 516 return 0; 517 518 grh = rdma_ah_retrieve_grh(ah_attr); 519 if (grh->sgid_attr) 520 return 0; 521 522 sgid_attr = 523 rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index); 524 if (IS_ERR(sgid_attr)) 525 return PTR_ERR(sgid_attr); 526 527 /* Move ownerhip of the kref into the ah_attr */ 528 grh->sgid_attr = sgid_attr; 529 return 0; 530 } 531 532 static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr, 533 const struct ib_gid_attr *old_sgid_attr) 534 { 535 /* 536 * Fill didn't change anything, the caller retains ownership of 537 * whatever it passed 538 */ 539 if (ah_attr->grh.sgid_attr == old_sgid_attr) 540 return; 541 542 /* 543 * Otherwise, we need to undo what rdma_fill_sgid_attr so the caller 544 * doesn't see any change in the rdma_ah_attr. If we get here 545 * old_sgid_attr is NULL. 546 */ 547 rdma_destroy_ah_attr(ah_attr); 548 } 549 550 static const struct ib_gid_attr * 551 rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr, 552 const struct ib_gid_attr *old_attr) 553 { 554 if (old_attr) 555 rdma_put_gid_attr(old_attr); 556 if (ah_attr->ah_flags & IB_AH_GRH) { 557 rdma_hold_gid_attr(ah_attr->grh.sgid_attr); 558 return ah_attr->grh.sgid_attr; 559 } 560 return NULL; 561 } 562 563 static struct ib_ah *_rdma_create_ah(struct ib_pd *pd, 564 struct rdma_ah_attr *ah_attr, 565 u32 flags, 566 struct ib_udata *udata, 567 struct net_device *xmit_slave) 568 { 569 struct rdma_ah_init_attr init_attr = {}; 570 struct ib_device *device = pd->device; 571 struct ib_ah *ah; 572 int ret; 573 574 might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE); 575 576 if (!udata && !device->ops.create_ah) 577 return ERR_PTR(-EOPNOTSUPP); 578 579 ah = rdma_zalloc_drv_obj_gfp( 580 device, ib_ah, 581 (flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC); 582 if (!ah) 583 return ERR_PTR(-ENOMEM); 584 585 ah->device = device; 586 ah->pd = pd; 587 ah->type = ah_attr->type; 588 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL); 589 init_attr.ah_attr = ah_attr; 590 init_attr.flags = flags; 591 init_attr.xmit_slave = xmit_slave; 592 593 if (udata) 594 ret = device->ops.create_user_ah(ah, &init_attr, udata); 595 else 596 ret = device->ops.create_ah(ah, &init_attr, NULL); 597 if (ret) { 598 if (ah->sgid_attr) 599 rdma_put_gid_attr(ah->sgid_attr); 600 kfree(ah); 601 return ERR_PTR(ret); 602 } 603 604 atomic_inc(&pd->usecnt); 605 return ah; 606 } 607 608 /** 609 * rdma_create_ah - Creates an address handle for the 610 * given address vector. 611 * @pd: The protection domain associated with the address handle. 612 * @ah_attr: The attributes of the address vector. 613 * @flags: Create address handle flags (see enum rdma_create_ah_flags). 614 * 615 * It returns 0 on success and returns appropriate error code on error. 616 * The address handle is used to reference a local or global destination 617 * in all UD QP post sends. 618 */ 619 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr, 620 u32 flags) 621 { 622 const struct ib_gid_attr *old_sgid_attr; 623 struct net_device *slave; 624 struct ib_ah *ah; 625 int ret; 626 627 ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr); 628 if (ret) 629 return ERR_PTR(ret); 630 slave = rdma_lag_get_ah_roce_slave(pd->device, ah_attr, 631 (flags & RDMA_CREATE_AH_SLEEPABLE) ? 632 GFP_KERNEL : GFP_ATOMIC); 633 if (IS_ERR(slave)) { 634 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 635 return ERR_CAST(slave); 636 } 637 ah = _rdma_create_ah(pd, ah_attr, flags, NULL, slave); 638 rdma_lag_put_ah_roce_slave(slave); 639 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 640 return ah; 641 } 642 EXPORT_SYMBOL(rdma_create_ah); 643 644 /** 645 * rdma_create_user_ah - Creates an address handle for the 646 * given address vector. 647 * It resolves destination mac address for ah attribute of RoCE type. 648 * @pd: The protection domain associated with the address handle. 649 * @ah_attr: The attributes of the address vector. 650 * @udata: pointer to user's input output buffer information need by 651 * provider driver. 652 * 653 * It returns 0 on success and returns appropriate error code on error. 654 * The address handle is used to reference a local or global destination 655 * in all UD QP post sends. 656 */ 657 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd, 658 struct rdma_ah_attr *ah_attr, 659 struct ib_udata *udata) 660 { 661 const struct ib_gid_attr *old_sgid_attr; 662 struct ib_ah *ah; 663 int err; 664 665 err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr); 666 if (err) 667 return ERR_PTR(err); 668 669 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) { 670 err = ib_resolve_eth_dmac(pd->device, ah_attr); 671 if (err) { 672 ah = ERR_PTR(err); 673 goto out; 674 } 675 } 676 677 ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE, 678 udata, NULL); 679 680 out: 681 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 682 return ah; 683 } 684 EXPORT_SYMBOL(rdma_create_user_ah); 685 686 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr) 687 { 688 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh; 689 struct iphdr ip4h_checked; 690 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh; 691 692 /* If it's IPv6, the version must be 6, otherwise, the first 693 * 20 bytes (before the IPv4 header) are garbled. 694 */ 695 if (ip6h->version != 6) 696 return (ip4h->version == 4) ? 4 : 0; 697 /* version may be 6 or 4 because the first 20 bytes could be garbled */ 698 699 /* RoCE v2 requires no options, thus header length 700 * must be 5 words 701 */ 702 if (ip4h->ihl != 5) 703 return 6; 704 705 /* Verify checksum. 706 * We can't write on scattered buffers so we need to copy to 707 * temp buffer. 708 */ 709 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked)); 710 ip4h_checked.check = 0; 711 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5); 712 /* if IPv4 header checksum is OK, believe it */ 713 if (ip4h->check == ip4h_checked.check) 714 return 4; 715 return 6; 716 } 717 EXPORT_SYMBOL(ib_get_rdma_header_version); 718 719 static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device, 720 u32 port_num, 721 const struct ib_grh *grh) 722 { 723 int grh_version; 724 725 if (rdma_protocol_ib(device, port_num)) 726 return RDMA_NETWORK_IB; 727 728 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh); 729 730 if (grh_version == 4) 731 return RDMA_NETWORK_IPV4; 732 733 if (grh->next_hdr == IPPROTO_UDP) 734 return RDMA_NETWORK_IPV6; 735 736 return RDMA_NETWORK_ROCE_V1; 737 } 738 739 struct find_gid_index_context { 740 u16 vlan_id; 741 enum ib_gid_type gid_type; 742 }; 743 744 static bool find_gid_index(const union ib_gid *gid, 745 const struct ib_gid_attr *gid_attr, 746 void *context) 747 { 748 struct find_gid_index_context *ctx = context; 749 u16 vlan_id = 0xffff; 750 int ret; 751 752 if (ctx->gid_type != gid_attr->gid_type) 753 return false; 754 755 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL); 756 if (ret) 757 return false; 758 759 return ctx->vlan_id == vlan_id; 760 } 761 762 static const struct ib_gid_attr * 763 get_sgid_attr_from_eth(struct ib_device *device, u32 port_num, 764 u16 vlan_id, const union ib_gid *sgid, 765 enum ib_gid_type gid_type) 766 { 767 struct find_gid_index_context context = {.vlan_id = vlan_id, 768 .gid_type = gid_type}; 769 770 return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index, 771 &context); 772 } 773 774 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 775 enum rdma_network_type net_type, 776 union ib_gid *sgid, union ib_gid *dgid) 777 { 778 struct sockaddr_in src_in; 779 struct sockaddr_in dst_in; 780 __be32 src_saddr, dst_saddr; 781 782 if (!sgid || !dgid) 783 return -EINVAL; 784 785 if (net_type == RDMA_NETWORK_IPV4) { 786 memcpy(&src_in.sin_addr.s_addr, 787 &hdr->roce4grh.saddr, 4); 788 memcpy(&dst_in.sin_addr.s_addr, 789 &hdr->roce4grh.daddr, 4); 790 src_saddr = src_in.sin_addr.s_addr; 791 dst_saddr = dst_in.sin_addr.s_addr; 792 ipv6_addr_set_v4mapped(src_saddr, 793 (struct in6_addr *)sgid); 794 ipv6_addr_set_v4mapped(dst_saddr, 795 (struct in6_addr *)dgid); 796 return 0; 797 } else if (net_type == RDMA_NETWORK_IPV6 || 798 net_type == RDMA_NETWORK_IB || net_type == RDMA_NETWORK_ROCE_V1) { 799 *dgid = hdr->ibgrh.dgid; 800 *sgid = hdr->ibgrh.sgid; 801 return 0; 802 } else { 803 return -EINVAL; 804 } 805 } 806 EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr); 807 808 /* Resolve destination mac address and hop limit for unicast destination 809 * GID entry, considering the source GID entry as well. 810 * ah_attribute must have valid port_num, sgid_index. 811 */ 812 static int ib_resolve_unicast_gid_dmac(struct ib_device *device, 813 struct rdma_ah_attr *ah_attr) 814 { 815 struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr); 816 const struct ib_gid_attr *sgid_attr = grh->sgid_attr; 817 int hop_limit = 0xff; 818 int ret = 0; 819 820 /* If destination is link local and source GID is RoCEv1, 821 * IP stack is not used. 822 */ 823 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) && 824 sgid_attr->gid_type == IB_GID_TYPE_ROCE) { 825 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw, 826 ah_attr->roce.dmac); 827 return ret; 828 } 829 830 ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid, 831 ah_attr->roce.dmac, 832 sgid_attr, &hop_limit); 833 834 grh->hop_limit = hop_limit; 835 return ret; 836 } 837 838 /* 839 * This function initializes address handle attributes from the incoming packet. 840 * Incoming packet has dgid of the receiver node on which this code is 841 * getting executed and, sgid contains the GID of the sender. 842 * 843 * When resolving mac address of destination, the arrived dgid is used 844 * as sgid and, sgid is used as dgid because sgid contains destinations 845 * GID whom to respond to. 846 * 847 * On success the caller is responsible to call rdma_destroy_ah_attr on the 848 * attr. 849 */ 850 int ib_init_ah_attr_from_wc(struct ib_device *device, u32 port_num, 851 const struct ib_wc *wc, const struct ib_grh *grh, 852 struct rdma_ah_attr *ah_attr) 853 { 854 u32 flow_class; 855 int ret; 856 enum rdma_network_type net_type = RDMA_NETWORK_IB; 857 enum ib_gid_type gid_type = IB_GID_TYPE_IB; 858 const struct ib_gid_attr *sgid_attr; 859 int hoplimit = 0xff; 860 union ib_gid dgid; 861 union ib_gid sgid; 862 863 might_sleep(); 864 865 memset(ah_attr, 0, sizeof *ah_attr); 866 ah_attr->type = rdma_ah_find_type(device, port_num); 867 if (rdma_cap_eth_ah(device, port_num)) { 868 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE) 869 net_type = wc->network_hdr_type; 870 else 871 net_type = ib_get_net_type_by_grh(device, port_num, grh); 872 gid_type = ib_network_to_gid_type(net_type); 873 } 874 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type, 875 &sgid, &dgid); 876 if (ret) 877 return ret; 878 879 rdma_ah_set_sl(ah_attr, wc->sl); 880 rdma_ah_set_port_num(ah_attr, port_num); 881 882 if (rdma_protocol_roce(device, port_num)) { 883 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ? 884 wc->vlan_id : 0xffff; 885 886 if (!(wc->wc_flags & IB_WC_GRH)) 887 return -EPROTOTYPE; 888 889 sgid_attr = get_sgid_attr_from_eth(device, port_num, 890 vlan_id, &dgid, 891 gid_type); 892 if (IS_ERR(sgid_attr)) 893 return PTR_ERR(sgid_attr); 894 895 flow_class = be32_to_cpu(grh->version_tclass_flow); 896 rdma_move_grh_sgid_attr(ah_attr, 897 &sgid, 898 flow_class & 0xFFFFF, 899 hoplimit, 900 (flow_class >> 20) & 0xFF, 901 sgid_attr); 902 903 ret = ib_resolve_unicast_gid_dmac(device, ah_attr); 904 if (ret) 905 rdma_destroy_ah_attr(ah_attr); 906 907 return ret; 908 } else { 909 rdma_ah_set_dlid(ah_attr, wc->slid); 910 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits); 911 912 if ((wc->wc_flags & IB_WC_GRH) == 0) 913 return 0; 914 915 if (dgid.global.interface_id != 916 cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) { 917 sgid_attr = rdma_find_gid_by_port( 918 device, &dgid, IB_GID_TYPE_IB, port_num, NULL); 919 } else 920 sgid_attr = rdma_get_gid_attr(device, port_num, 0); 921 922 if (IS_ERR(sgid_attr)) 923 return PTR_ERR(sgid_attr); 924 flow_class = be32_to_cpu(grh->version_tclass_flow); 925 rdma_move_grh_sgid_attr(ah_attr, 926 &sgid, 927 flow_class & 0xFFFFF, 928 hoplimit, 929 (flow_class >> 20) & 0xFF, 930 sgid_attr); 931 932 return 0; 933 } 934 } 935 EXPORT_SYMBOL(ib_init_ah_attr_from_wc); 936 937 /** 938 * rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership 939 * of the reference 940 * 941 * @attr: Pointer to AH attribute structure 942 * @dgid: Destination GID 943 * @flow_label: Flow label 944 * @hop_limit: Hop limit 945 * @traffic_class: traffic class 946 * @sgid_attr: Pointer to SGID attribute 947 * 948 * This takes ownership of the sgid_attr reference. The caller must ensure 949 * rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after 950 * calling this function. 951 */ 952 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid, 953 u32 flow_label, u8 hop_limit, u8 traffic_class, 954 const struct ib_gid_attr *sgid_attr) 955 { 956 rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit, 957 traffic_class); 958 attr->grh.sgid_attr = sgid_attr; 959 } 960 EXPORT_SYMBOL(rdma_move_grh_sgid_attr); 961 962 /** 963 * rdma_destroy_ah_attr - Release reference to SGID attribute of 964 * ah attribute. 965 * @ah_attr: Pointer to ah attribute 966 * 967 * Release reference to the SGID attribute of the ah attribute if it is 968 * non NULL. It is safe to call this multiple times, and safe to call it on 969 * a zero initialized ah_attr. 970 */ 971 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr) 972 { 973 if (ah_attr->grh.sgid_attr) { 974 rdma_put_gid_attr(ah_attr->grh.sgid_attr); 975 ah_attr->grh.sgid_attr = NULL; 976 } 977 } 978 EXPORT_SYMBOL(rdma_destroy_ah_attr); 979 980 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 981 const struct ib_grh *grh, u32 port_num) 982 { 983 struct rdma_ah_attr ah_attr; 984 struct ib_ah *ah; 985 int ret; 986 987 ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr); 988 if (ret) 989 return ERR_PTR(ret); 990 991 ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE); 992 993 rdma_destroy_ah_attr(&ah_attr); 994 return ah; 995 } 996 EXPORT_SYMBOL(ib_create_ah_from_wc); 997 998 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 999 { 1000 const struct ib_gid_attr *old_sgid_attr; 1001 int ret; 1002 1003 if (ah->type != ah_attr->type) 1004 return -EINVAL; 1005 1006 ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr); 1007 if (ret) 1008 return ret; 1009 1010 ret = ah->device->ops.modify_ah ? 1011 ah->device->ops.modify_ah(ah, ah_attr) : 1012 -EOPNOTSUPP; 1013 1014 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr); 1015 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 1016 return ret; 1017 } 1018 EXPORT_SYMBOL(rdma_modify_ah); 1019 1020 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 1021 { 1022 ah_attr->grh.sgid_attr = NULL; 1023 1024 return ah->device->ops.query_ah ? 1025 ah->device->ops.query_ah(ah, ah_attr) : 1026 -EOPNOTSUPP; 1027 } 1028 EXPORT_SYMBOL(rdma_query_ah); 1029 1030 int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata) 1031 { 1032 const struct ib_gid_attr *sgid_attr = ah->sgid_attr; 1033 struct ib_pd *pd; 1034 int ret; 1035 1036 might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE); 1037 1038 pd = ah->pd; 1039 1040 ret = ah->device->ops.destroy_ah(ah, flags); 1041 if (ret) 1042 return ret; 1043 1044 atomic_dec(&pd->usecnt); 1045 if (sgid_attr) 1046 rdma_put_gid_attr(sgid_attr); 1047 1048 kfree(ah); 1049 return ret; 1050 } 1051 EXPORT_SYMBOL(rdma_destroy_ah_user); 1052 1053 /* Shared receive queues */ 1054 1055 /** 1056 * ib_create_srq_user - Creates a SRQ associated with the specified protection 1057 * domain. 1058 * @pd: The protection domain associated with the SRQ. 1059 * @srq_init_attr: A list of initial attributes required to create the 1060 * SRQ. If SRQ creation succeeds, then the attributes are updated to 1061 * the actual capabilities of the created SRQ. 1062 * @uobject: uobject pointer if this is not a kernel SRQ 1063 * @udata: udata pointer if this is not a kernel SRQ 1064 * 1065 * srq_attr->max_wr and srq_attr->max_sge are read the determine the 1066 * requested size of the SRQ, and set to the actual values allocated 1067 * on return. If ib_create_srq() succeeds, then max_wr and max_sge 1068 * will always be at least as large as the requested values. 1069 */ 1070 struct ib_srq *ib_create_srq_user(struct ib_pd *pd, 1071 struct ib_srq_init_attr *srq_init_attr, 1072 struct ib_usrq_object *uobject, 1073 struct ib_udata *udata) 1074 { 1075 struct ib_srq *srq; 1076 int ret; 1077 1078 srq = rdma_zalloc_drv_obj(pd->device, ib_srq); 1079 if (!srq) 1080 return ERR_PTR(-ENOMEM); 1081 1082 srq->device = pd->device; 1083 srq->pd = pd; 1084 srq->event_handler = srq_init_attr->event_handler; 1085 srq->srq_context = srq_init_attr->srq_context; 1086 srq->srq_type = srq_init_attr->srq_type; 1087 srq->uobject = uobject; 1088 1089 if (ib_srq_has_cq(srq->srq_type)) { 1090 srq->ext.cq = srq_init_attr->ext.cq; 1091 atomic_inc(&srq->ext.cq->usecnt); 1092 } 1093 if (srq->srq_type == IB_SRQT_XRC) { 1094 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd; 1095 if (srq->ext.xrc.xrcd) 1096 atomic_inc(&srq->ext.xrc.xrcd->usecnt); 1097 } 1098 atomic_inc(&pd->usecnt); 1099 1100 rdma_restrack_new(&srq->res, RDMA_RESTRACK_SRQ); 1101 rdma_restrack_parent_name(&srq->res, &pd->res); 1102 1103 ret = pd->device->ops.create_srq(srq, srq_init_attr, udata); 1104 if (ret) { 1105 rdma_restrack_put(&srq->res); 1106 atomic_dec(&pd->usecnt); 1107 if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd) 1108 atomic_dec(&srq->ext.xrc.xrcd->usecnt); 1109 if (ib_srq_has_cq(srq->srq_type)) 1110 atomic_dec(&srq->ext.cq->usecnt); 1111 kfree(srq); 1112 return ERR_PTR(ret); 1113 } 1114 1115 rdma_restrack_add(&srq->res); 1116 1117 return srq; 1118 } 1119 EXPORT_SYMBOL(ib_create_srq_user); 1120 1121 int ib_modify_srq(struct ib_srq *srq, 1122 struct ib_srq_attr *srq_attr, 1123 enum ib_srq_attr_mask srq_attr_mask) 1124 { 1125 return srq->device->ops.modify_srq ? 1126 srq->device->ops.modify_srq(srq, srq_attr, srq_attr_mask, 1127 NULL) : -EOPNOTSUPP; 1128 } 1129 EXPORT_SYMBOL(ib_modify_srq); 1130 1131 int ib_query_srq(struct ib_srq *srq, 1132 struct ib_srq_attr *srq_attr) 1133 { 1134 return srq->device->ops.query_srq ? 1135 srq->device->ops.query_srq(srq, srq_attr) : -EOPNOTSUPP; 1136 } 1137 EXPORT_SYMBOL(ib_query_srq); 1138 1139 int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata) 1140 { 1141 int ret; 1142 1143 if (atomic_read(&srq->usecnt)) 1144 return -EBUSY; 1145 1146 rdma_restrack_begin_del(&srq->res); 1147 1148 ret = srq->device->ops.destroy_srq(srq, udata); 1149 if (ret) { 1150 rdma_restrack_abort_del(&srq->res); 1151 return ret; 1152 } 1153 1154 atomic_dec(&srq->pd->usecnt); 1155 if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd) 1156 atomic_dec(&srq->ext.xrc.xrcd->usecnt); 1157 if (ib_srq_has_cq(srq->srq_type)) 1158 atomic_dec(&srq->ext.cq->usecnt); 1159 rdma_restrack_commit_del(&srq->res); 1160 kfree(srq); 1161 1162 return ret; 1163 } 1164 EXPORT_SYMBOL(ib_destroy_srq_user); 1165 1166 /* Queue pairs */ 1167 1168 static void __ib_qp_event_handler(struct ib_event *event, void *context) 1169 { 1170 struct ib_qp *qp = event->element.qp; 1171 1172 if (event->event == IB_EVENT_QP_LAST_WQE_REACHED) 1173 complete(&qp->srq_completion); 1174 if (qp->registered_event_handler) 1175 qp->registered_event_handler(event, qp->qp_context); 1176 } 1177 1178 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) 1179 { 1180 struct ib_qp *qp = context; 1181 unsigned long flags; 1182 1183 spin_lock_irqsave(&qp->device->qp_open_list_lock, flags); 1184 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 1185 if (event->element.qp->event_handler) 1186 event->element.qp->event_handler(event, event->element.qp->qp_context); 1187 spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags); 1188 } 1189 1190 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 1191 void (*event_handler)(struct ib_event *, void *), 1192 void *qp_context) 1193 { 1194 struct ib_qp *qp; 1195 unsigned long flags; 1196 int err; 1197 1198 qp = kzalloc_obj(*qp); 1199 if (!qp) 1200 return ERR_PTR(-ENOMEM); 1201 1202 qp->real_qp = real_qp; 1203 err = ib_open_shared_qp_security(qp, real_qp->device); 1204 if (err) { 1205 kfree(qp); 1206 return ERR_PTR(err); 1207 } 1208 1209 qp->real_qp = real_qp; 1210 atomic_inc(&real_qp->usecnt); 1211 qp->device = real_qp->device; 1212 qp->event_handler = event_handler; 1213 qp->qp_context = qp_context; 1214 qp->qp_num = real_qp->qp_num; 1215 qp->qp_type = real_qp->qp_type; 1216 1217 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags); 1218 list_add(&qp->open_list, &real_qp->open_list); 1219 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags); 1220 1221 return qp; 1222 } 1223 1224 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 1225 struct ib_qp_open_attr *qp_open_attr) 1226 { 1227 struct ib_qp *qp, *real_qp; 1228 1229 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 1230 return ERR_PTR(-EINVAL); 1231 1232 down_read(&xrcd->tgt_qps_rwsem); 1233 real_qp = xa_load(&xrcd->tgt_qps, qp_open_attr->qp_num); 1234 if (!real_qp) { 1235 up_read(&xrcd->tgt_qps_rwsem); 1236 return ERR_PTR(-EINVAL); 1237 } 1238 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 1239 qp_open_attr->qp_context); 1240 up_read(&xrcd->tgt_qps_rwsem); 1241 return qp; 1242 } 1243 EXPORT_SYMBOL(ib_open_qp); 1244 1245 static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp, 1246 struct ib_qp_init_attr *qp_init_attr) 1247 { 1248 struct ib_qp *real_qp = qp; 1249 int err; 1250 1251 qp->event_handler = __ib_shared_qp_event_handler; 1252 qp->qp_context = qp; 1253 qp->pd = NULL; 1254 qp->send_cq = qp->recv_cq = NULL; 1255 qp->srq = NULL; 1256 qp->xrcd = qp_init_attr->xrcd; 1257 atomic_inc(&qp_init_attr->xrcd->usecnt); 1258 INIT_LIST_HEAD(&qp->open_list); 1259 1260 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 1261 qp_init_attr->qp_context); 1262 if (IS_ERR(qp)) 1263 return qp; 1264 1265 err = xa_err(xa_store(&qp_init_attr->xrcd->tgt_qps, real_qp->qp_num, 1266 real_qp, GFP_KERNEL)); 1267 if (err) { 1268 ib_close_qp(qp); 1269 return ERR_PTR(err); 1270 } 1271 return qp; 1272 } 1273 1274 static struct ib_qp *create_qp(struct ib_device *dev, struct ib_pd *pd, 1275 struct ib_qp_init_attr *attr, 1276 struct uverbs_attr_bundle *uattrs, 1277 struct ib_uqp_object *uobj, const char *caller) 1278 { 1279 struct ib_qp *qp; 1280 int ret; 1281 1282 if (!dev->ops.create_qp) 1283 return ERR_PTR(-EOPNOTSUPP); 1284 1285 qp = rdma_zalloc_drv_obj_numa(dev, ib_qp); 1286 if (!qp) 1287 return ERR_PTR(-ENOMEM); 1288 1289 qp->device = dev; 1290 qp->pd = pd; 1291 qp->uobject = uobj; 1292 qp->real_qp = qp; 1293 1294 qp->qp_type = attr->qp_type; 1295 qp->rwq_ind_tbl = attr->rwq_ind_tbl; 1296 qp->srq = attr->srq; 1297 qp->event_handler = __ib_qp_event_handler; 1298 qp->registered_event_handler = attr->event_handler; 1299 qp->port = attr->port_num; 1300 qp->qp_context = attr->qp_context; 1301 1302 spin_lock_init(&qp->mr_lock); 1303 xa_init(&qp->comp_cntrs); 1304 INIT_LIST_HEAD(&qp->rdma_mrs); 1305 INIT_LIST_HEAD(&qp->sig_mrs); 1306 init_completion(&qp->srq_completion); 1307 1308 qp->send_cq = attr->send_cq; 1309 qp->recv_cq = attr->recv_cq; 1310 1311 rdma_restrack_new(&qp->res, RDMA_RESTRACK_QP); 1312 WARN_ONCE(!uattrs && !caller, "Missing kernel QP owner"); 1313 rdma_restrack_set_name(&qp->res, uattrs ? NULL : caller); 1314 ret = dev->ops.create_qp(qp, attr, 1315 uattrs ? &uattrs->driver_udata : NULL); 1316 if (ret) 1317 goto err_create; 1318 1319 /* 1320 * TODO: The mlx4 internally overwrites send_cq and recv_cq. 1321 * Unfortunately, it is not an easy task to fix that driver. 1322 */ 1323 qp->send_cq = attr->send_cq; 1324 qp->recv_cq = attr->recv_cq; 1325 1326 ret = ib_create_qp_security(qp, dev); 1327 if (ret) 1328 goto err_security; 1329 1330 rdma_restrack_add(&qp->res); 1331 return qp; 1332 1333 err_security: 1334 qp->device->ops.destroy_qp( 1335 qp, uattrs ? uverbs_get_cleared_udata(uattrs) : NULL); 1336 err_create: 1337 rdma_restrack_put(&qp->res); 1338 xa_destroy(&qp->comp_cntrs); 1339 kfree(qp); 1340 return ERR_PTR(ret); 1341 1342 } 1343 1344 /** 1345 * ib_create_qp_user - Creates a QP associated with the specified protection 1346 * domain. 1347 * @dev: IB device 1348 * @pd: The protection domain associated with the QP. 1349 * @attr: A list of initial attributes required to create the 1350 * QP. If QP creation succeeds, then the attributes are updated to 1351 * the actual capabilities of the created QP. 1352 * @uattrs: User ioctl attributes and udata 1353 * @uobj: uverbs obect 1354 * @caller: caller's build-time module name 1355 */ 1356 struct ib_qp *ib_create_qp_user(struct ib_device *dev, struct ib_pd *pd, 1357 struct ib_qp_init_attr *attr, 1358 struct uverbs_attr_bundle *uattrs, 1359 struct ib_uqp_object *uobj, const char *caller) 1360 { 1361 struct ib_qp *qp, *xrc_qp; 1362 1363 if (attr->qp_type == IB_QPT_XRC_TGT) 1364 qp = create_qp(dev, pd, attr, NULL, NULL, caller); 1365 else 1366 qp = create_qp(dev, pd, attr, uattrs, uobj, NULL); 1367 if (attr->qp_type != IB_QPT_XRC_TGT || IS_ERR(qp)) 1368 return qp; 1369 1370 xrc_qp = create_xrc_qp_user(qp, attr); 1371 if (IS_ERR(xrc_qp)) { 1372 ib_destroy_qp(qp); 1373 return xrc_qp; 1374 } 1375 1376 xrc_qp->uobject = uobj; 1377 return xrc_qp; 1378 } 1379 EXPORT_SYMBOL(ib_create_qp_user); 1380 1381 void ib_qp_usecnt_inc(struct ib_qp *qp) 1382 { 1383 if (qp->pd) 1384 atomic_inc(&qp->pd->usecnt); 1385 if (qp->send_cq) 1386 atomic_inc(&qp->send_cq->usecnt); 1387 if (qp->recv_cq) 1388 atomic_inc(&qp->recv_cq->usecnt); 1389 if (qp->srq) 1390 atomic_inc(&qp->srq->usecnt); 1391 if (qp->rwq_ind_tbl) 1392 atomic_inc(&qp->rwq_ind_tbl->usecnt); 1393 } 1394 EXPORT_SYMBOL(ib_qp_usecnt_inc); 1395 1396 void ib_qp_usecnt_dec(struct ib_qp *qp) 1397 { 1398 if (qp->rwq_ind_tbl) 1399 atomic_dec(&qp->rwq_ind_tbl->usecnt); 1400 if (qp->srq) 1401 atomic_dec(&qp->srq->usecnt); 1402 if (qp->recv_cq) 1403 atomic_dec(&qp->recv_cq->usecnt); 1404 if (qp->send_cq) 1405 atomic_dec(&qp->send_cq->usecnt); 1406 if (qp->pd) 1407 atomic_dec(&qp->pd->usecnt); 1408 } 1409 EXPORT_SYMBOL(ib_qp_usecnt_dec); 1410 1411 struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd, 1412 struct ib_qp_init_attr *qp_init_attr, 1413 const char *caller) 1414 { 1415 struct ib_device *device = pd->device; 1416 struct ib_qp *qp; 1417 int ret; 1418 1419 /* 1420 * If the callers is using the RDMA API calculate the resources 1421 * needed for the RDMA READ/WRITE operations. 1422 * 1423 * Note that these callers need to pass in a port number. 1424 */ 1425 if (qp_init_attr->cap.max_rdma_ctxs) 1426 rdma_rw_init_qp(device, qp_init_attr); 1427 1428 qp = create_qp(device, pd, qp_init_attr, NULL, NULL, caller); 1429 if (IS_ERR(qp)) 1430 return qp; 1431 1432 ib_qp_usecnt_inc(qp); 1433 1434 if (qp_init_attr->cap.max_rdma_ctxs) { 1435 ret = rdma_rw_init_mrs(qp, qp_init_attr); 1436 if (ret) 1437 goto err; 1438 } 1439 1440 /* 1441 * Note: all hw drivers guarantee that max_send_sge is lower than 1442 * the device RDMA WRITE SGE limit but not all hw drivers ensure that 1443 * max_send_sge <= max_sge_rd. 1444 */ 1445 qp->max_write_sge = qp_init_attr->cap.max_send_sge; 1446 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge, 1447 device->attrs.max_sge_rd); 1448 if (qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN) 1449 qp->integrity_en = true; 1450 1451 return qp; 1452 1453 err: 1454 ib_destroy_qp(qp); 1455 return ERR_PTR(ret); 1456 1457 } 1458 EXPORT_SYMBOL(ib_create_qp_kernel); 1459 1460 static const struct { 1461 int valid; 1462 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 1463 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 1464 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 1465 [IB_QPS_RESET] = { 1466 [IB_QPS_RESET] = { .valid = 1 }, 1467 [IB_QPS_INIT] = { 1468 .valid = 1, 1469 .req_param = { 1470 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1471 IB_QP_PORT | 1472 IB_QP_QKEY), 1473 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 1474 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 1475 IB_QP_PORT | 1476 IB_QP_ACCESS_FLAGS), 1477 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 1478 IB_QP_PORT | 1479 IB_QP_ACCESS_FLAGS), 1480 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 1481 IB_QP_PORT | 1482 IB_QP_ACCESS_FLAGS), 1483 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 1484 IB_QP_PORT | 1485 IB_QP_ACCESS_FLAGS), 1486 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1487 IB_QP_QKEY), 1488 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1489 IB_QP_QKEY), 1490 } 1491 }, 1492 }, 1493 [IB_QPS_INIT] = { 1494 [IB_QPS_RESET] = { .valid = 1 }, 1495 [IB_QPS_ERR] = { .valid = 1 }, 1496 [IB_QPS_INIT] = { 1497 .valid = 1, 1498 .opt_param = { 1499 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1500 IB_QP_PORT | 1501 IB_QP_QKEY), 1502 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 1503 IB_QP_PORT | 1504 IB_QP_ACCESS_FLAGS), 1505 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 1506 IB_QP_PORT | 1507 IB_QP_ACCESS_FLAGS), 1508 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 1509 IB_QP_PORT | 1510 IB_QP_ACCESS_FLAGS), 1511 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 1512 IB_QP_PORT | 1513 IB_QP_ACCESS_FLAGS), 1514 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1515 IB_QP_QKEY), 1516 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1517 IB_QP_QKEY), 1518 } 1519 }, 1520 [IB_QPS_RTR] = { 1521 .valid = 1, 1522 .req_param = { 1523 [IB_QPT_UC] = (IB_QP_AV | 1524 IB_QP_PATH_MTU | 1525 IB_QP_DEST_QPN | 1526 IB_QP_RQ_PSN), 1527 [IB_QPT_RC] = (IB_QP_AV | 1528 IB_QP_PATH_MTU | 1529 IB_QP_DEST_QPN | 1530 IB_QP_RQ_PSN | 1531 IB_QP_MAX_DEST_RD_ATOMIC | 1532 IB_QP_MIN_RNR_TIMER), 1533 [IB_QPT_XRC_INI] = (IB_QP_AV | 1534 IB_QP_PATH_MTU | 1535 IB_QP_DEST_QPN | 1536 IB_QP_RQ_PSN), 1537 [IB_QPT_XRC_TGT] = (IB_QP_AV | 1538 IB_QP_PATH_MTU | 1539 IB_QP_DEST_QPN | 1540 IB_QP_RQ_PSN | 1541 IB_QP_MAX_DEST_RD_ATOMIC | 1542 IB_QP_MIN_RNR_TIMER), 1543 }, 1544 .opt_param = { 1545 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1546 IB_QP_QKEY), 1547 [IB_QPT_UC] = (IB_QP_ALT_PATH | 1548 IB_QP_ACCESS_FLAGS | 1549 IB_QP_PKEY_INDEX), 1550 [IB_QPT_RC] = (IB_QP_ALT_PATH | 1551 IB_QP_ACCESS_FLAGS | 1552 IB_QP_PKEY_INDEX), 1553 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 1554 IB_QP_ACCESS_FLAGS | 1555 IB_QP_PKEY_INDEX), 1556 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 1557 IB_QP_ACCESS_FLAGS | 1558 IB_QP_PKEY_INDEX), 1559 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1560 IB_QP_QKEY), 1561 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1562 IB_QP_QKEY), 1563 }, 1564 }, 1565 }, 1566 [IB_QPS_RTR] = { 1567 [IB_QPS_RESET] = { .valid = 1 }, 1568 [IB_QPS_ERR] = { .valid = 1 }, 1569 [IB_QPS_RTS] = { 1570 .valid = 1, 1571 .req_param = { 1572 [IB_QPT_UD] = IB_QP_SQ_PSN, 1573 [IB_QPT_UC] = IB_QP_SQ_PSN, 1574 [IB_QPT_RC] = (IB_QP_TIMEOUT | 1575 IB_QP_RETRY_CNT | 1576 IB_QP_RNR_RETRY | 1577 IB_QP_SQ_PSN | 1578 IB_QP_MAX_QP_RD_ATOMIC), 1579 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 1580 IB_QP_RETRY_CNT | 1581 IB_QP_RNR_RETRY | 1582 IB_QP_SQ_PSN | 1583 IB_QP_MAX_QP_RD_ATOMIC), 1584 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 1585 IB_QP_SQ_PSN), 1586 [IB_QPT_SMI] = IB_QP_SQ_PSN, 1587 [IB_QPT_GSI] = IB_QP_SQ_PSN, 1588 }, 1589 .opt_param = { 1590 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1591 IB_QP_QKEY), 1592 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1593 IB_QP_ALT_PATH | 1594 IB_QP_ACCESS_FLAGS | 1595 IB_QP_PATH_MIG_STATE), 1596 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1597 IB_QP_ALT_PATH | 1598 IB_QP_ACCESS_FLAGS | 1599 IB_QP_MIN_RNR_TIMER | 1600 IB_QP_PATH_MIG_STATE), 1601 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1602 IB_QP_ALT_PATH | 1603 IB_QP_ACCESS_FLAGS | 1604 IB_QP_PATH_MIG_STATE), 1605 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1606 IB_QP_ALT_PATH | 1607 IB_QP_ACCESS_FLAGS | 1608 IB_QP_MIN_RNR_TIMER | 1609 IB_QP_PATH_MIG_STATE), 1610 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1611 IB_QP_QKEY), 1612 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1613 IB_QP_QKEY), 1614 } 1615 } 1616 }, 1617 [IB_QPS_RTS] = { 1618 [IB_QPS_RESET] = { .valid = 1 }, 1619 [IB_QPS_ERR] = { .valid = 1 }, 1620 [IB_QPS_RTS] = { 1621 .valid = 1, 1622 .opt_param = { 1623 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1624 IB_QP_QKEY), 1625 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1626 IB_QP_ACCESS_FLAGS | 1627 IB_QP_ALT_PATH | 1628 IB_QP_PATH_MIG_STATE), 1629 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1630 IB_QP_ACCESS_FLAGS | 1631 IB_QP_ALT_PATH | 1632 IB_QP_PATH_MIG_STATE | 1633 IB_QP_MIN_RNR_TIMER), 1634 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1635 IB_QP_ACCESS_FLAGS | 1636 IB_QP_ALT_PATH | 1637 IB_QP_PATH_MIG_STATE), 1638 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1639 IB_QP_ACCESS_FLAGS | 1640 IB_QP_ALT_PATH | 1641 IB_QP_PATH_MIG_STATE | 1642 IB_QP_MIN_RNR_TIMER), 1643 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1644 IB_QP_QKEY), 1645 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1646 IB_QP_QKEY), 1647 } 1648 }, 1649 [IB_QPS_SQD] = { 1650 .valid = 1, 1651 .opt_param = { 1652 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1653 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1654 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1655 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1656 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 1657 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1658 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 1659 } 1660 }, 1661 }, 1662 [IB_QPS_SQD] = { 1663 [IB_QPS_RESET] = { .valid = 1 }, 1664 [IB_QPS_ERR] = { .valid = 1 }, 1665 [IB_QPS_RTS] = { 1666 .valid = 1, 1667 .opt_param = { 1668 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1669 IB_QP_QKEY), 1670 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1671 IB_QP_ALT_PATH | 1672 IB_QP_ACCESS_FLAGS | 1673 IB_QP_PATH_MIG_STATE), 1674 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1675 IB_QP_ALT_PATH | 1676 IB_QP_ACCESS_FLAGS | 1677 IB_QP_MIN_RNR_TIMER | 1678 IB_QP_PATH_MIG_STATE), 1679 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1680 IB_QP_ALT_PATH | 1681 IB_QP_ACCESS_FLAGS | 1682 IB_QP_PATH_MIG_STATE), 1683 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1684 IB_QP_ALT_PATH | 1685 IB_QP_ACCESS_FLAGS | 1686 IB_QP_MIN_RNR_TIMER | 1687 IB_QP_PATH_MIG_STATE), 1688 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1689 IB_QP_QKEY), 1690 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1691 IB_QP_QKEY), 1692 } 1693 }, 1694 [IB_QPS_SQD] = { 1695 .valid = 1, 1696 .opt_param = { 1697 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1698 IB_QP_QKEY), 1699 [IB_QPT_UC] = (IB_QP_AV | 1700 IB_QP_ALT_PATH | 1701 IB_QP_ACCESS_FLAGS | 1702 IB_QP_PKEY_INDEX | 1703 IB_QP_PATH_MIG_STATE), 1704 [IB_QPT_RC] = (IB_QP_PORT | 1705 IB_QP_AV | 1706 IB_QP_TIMEOUT | 1707 IB_QP_RETRY_CNT | 1708 IB_QP_RNR_RETRY | 1709 IB_QP_MAX_QP_RD_ATOMIC | 1710 IB_QP_MAX_DEST_RD_ATOMIC | 1711 IB_QP_ALT_PATH | 1712 IB_QP_ACCESS_FLAGS | 1713 IB_QP_PKEY_INDEX | 1714 IB_QP_MIN_RNR_TIMER | 1715 IB_QP_PATH_MIG_STATE), 1716 [IB_QPT_XRC_INI] = (IB_QP_PORT | 1717 IB_QP_AV | 1718 IB_QP_TIMEOUT | 1719 IB_QP_RETRY_CNT | 1720 IB_QP_RNR_RETRY | 1721 IB_QP_MAX_QP_RD_ATOMIC | 1722 IB_QP_ALT_PATH | 1723 IB_QP_ACCESS_FLAGS | 1724 IB_QP_PKEY_INDEX | 1725 IB_QP_PATH_MIG_STATE), 1726 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 1727 IB_QP_AV | 1728 IB_QP_TIMEOUT | 1729 IB_QP_MAX_DEST_RD_ATOMIC | 1730 IB_QP_ALT_PATH | 1731 IB_QP_ACCESS_FLAGS | 1732 IB_QP_PKEY_INDEX | 1733 IB_QP_MIN_RNR_TIMER | 1734 IB_QP_PATH_MIG_STATE), 1735 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1736 IB_QP_QKEY), 1737 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1738 IB_QP_QKEY), 1739 } 1740 } 1741 }, 1742 [IB_QPS_SQE] = { 1743 [IB_QPS_RESET] = { .valid = 1 }, 1744 [IB_QPS_ERR] = { .valid = 1 }, 1745 [IB_QPS_RTS] = { 1746 .valid = 1, 1747 .opt_param = { 1748 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1749 IB_QP_QKEY), 1750 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1751 IB_QP_ACCESS_FLAGS), 1752 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1753 IB_QP_QKEY), 1754 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1755 IB_QP_QKEY), 1756 } 1757 } 1758 }, 1759 [IB_QPS_ERR] = { 1760 [IB_QPS_RESET] = { .valid = 1 }, 1761 [IB_QPS_ERR] = { .valid = 1 } 1762 } 1763 }; 1764 1765 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 1766 enum ib_qp_type type, enum ib_qp_attr_mask mask) 1767 { 1768 enum ib_qp_attr_mask req_param, opt_param; 1769 1770 if (mask & IB_QP_CUR_STATE && 1771 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 1772 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 1773 return false; 1774 1775 if (!qp_state_table[cur_state][next_state].valid) 1776 return false; 1777 1778 req_param = qp_state_table[cur_state][next_state].req_param[type]; 1779 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 1780 1781 if ((mask & req_param) != req_param) 1782 return false; 1783 1784 if (mask & ~(req_param | opt_param | IB_QP_STATE | IB_QP_RATE_LIMIT)) 1785 return false; 1786 1787 return true; 1788 } 1789 EXPORT_SYMBOL(ib_modify_qp_is_ok); 1790 1791 /** 1792 * ib_resolve_eth_dmac - Resolve destination mac address 1793 * @device: Device to consider 1794 * @ah_attr: address handle attribute which describes the 1795 * source and destination parameters 1796 * ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It 1797 * returns 0 on success or appropriate error code. It initializes the 1798 * necessary ah_attr fields when call is successful. 1799 */ 1800 static int ib_resolve_eth_dmac(struct ib_device *device, 1801 struct rdma_ah_attr *ah_attr) 1802 { 1803 int ret = 0; 1804 1805 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1806 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1807 __be32 addr = 0; 1808 1809 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4); 1810 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac); 1811 } else { 1812 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw, 1813 (char *)ah_attr->roce.dmac); 1814 } 1815 } else { 1816 ret = ib_resolve_unicast_gid_dmac(device, ah_attr); 1817 } 1818 return ret; 1819 } 1820 1821 static bool is_qp_type_connected(const struct ib_qp *qp) 1822 { 1823 return (qp->qp_type == IB_QPT_UC || 1824 qp->qp_type == IB_QPT_RC || 1825 qp->qp_type == IB_QPT_XRC_INI || 1826 qp->qp_type == IB_QPT_XRC_TGT); 1827 } 1828 1829 /* 1830 * IB core internal function to perform QP attributes modification. 1831 */ 1832 static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, 1833 int attr_mask, struct ib_udata *udata) 1834 { 1835 u32 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1836 const struct ib_gid_attr *old_sgid_attr_av; 1837 const struct ib_gid_attr *old_sgid_attr_alt_av; 1838 int ret; 1839 1840 attr->xmit_slave = NULL; 1841 if (attr_mask & IB_QP_AV) { 1842 ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr, 1843 &old_sgid_attr_av); 1844 if (ret) 1845 return ret; 1846 1847 if (attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE && 1848 is_qp_type_connected(qp)) { 1849 struct net_device *slave; 1850 1851 /* 1852 * If the user provided the qp_attr then we have to 1853 * resolve it. Kerne users have to provide already 1854 * resolved rdma_ah_attr's. 1855 */ 1856 if (udata) { 1857 ret = ib_resolve_eth_dmac(qp->device, 1858 &attr->ah_attr); 1859 if (ret) 1860 goto out_av; 1861 } 1862 slave = rdma_lag_get_ah_roce_slave(qp->device, 1863 &attr->ah_attr, 1864 GFP_KERNEL); 1865 if (IS_ERR(slave)) { 1866 ret = PTR_ERR(slave); 1867 goto out_av; 1868 } 1869 attr->xmit_slave = slave; 1870 } 1871 } 1872 if (attr_mask & IB_QP_ALT_PATH) { 1873 /* 1874 * FIXME: This does not track the migration state, so if the 1875 * user loads a new alternate path after the HW has migrated 1876 * from primary->alternate we will keep the wrong 1877 * references. This is OK for IB because the reference 1878 * counting does not serve any functional purpose. 1879 */ 1880 ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr, 1881 &old_sgid_attr_alt_av); 1882 if (ret) 1883 goto out_av; 1884 1885 /* 1886 * Today the core code can only handle alternate paths and APM 1887 * for IB. Ban them in roce mode. 1888 */ 1889 if (!(rdma_protocol_ib(qp->device, 1890 attr->alt_ah_attr.port_num) && 1891 rdma_protocol_ib(qp->device, port))) { 1892 ret = -EINVAL; 1893 goto out; 1894 } 1895 } 1896 1897 if (rdma_ib_or_roce(qp->device, port)) { 1898 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) { 1899 dev_warn(&qp->device->dev, 1900 "%s rq_psn overflow, masking to 24 bits\n", 1901 __func__); 1902 attr->rq_psn &= 0xffffff; 1903 } 1904 1905 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) { 1906 dev_warn(&qp->device->dev, 1907 " %s sq_psn overflow, masking to 24 bits\n", 1908 __func__); 1909 attr->sq_psn &= 0xffffff; 1910 } 1911 } 1912 1913 /* 1914 * Bind this qp to a counter automatically based on the rdma counter 1915 * rules. This only set in RST2INIT with port specified 1916 */ 1917 if (!qp->counter && (attr_mask & IB_QP_PORT) && 1918 ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT)) 1919 rdma_counter_bind_qp_auto(qp, attr->port_num); 1920 1921 ret = ib_security_modify_qp(qp, attr, attr_mask, udata); 1922 if (ret) 1923 goto out; 1924 1925 if (attr_mask & IB_QP_PORT) 1926 qp->port = attr->port_num; 1927 if (attr_mask & IB_QP_AV) 1928 qp->av_sgid_attr = 1929 rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr); 1930 if (attr_mask & IB_QP_ALT_PATH) 1931 qp->alt_path_sgid_attr = rdma_update_sgid_attr( 1932 &attr->alt_ah_attr, qp->alt_path_sgid_attr); 1933 1934 out: 1935 if (attr_mask & IB_QP_ALT_PATH) 1936 rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av); 1937 out_av: 1938 if (attr_mask & IB_QP_AV) { 1939 rdma_lag_put_ah_roce_slave(attr->xmit_slave); 1940 rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av); 1941 } 1942 return ret; 1943 } 1944 1945 /** 1946 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 1947 * @ib_qp: The QP to modify. 1948 * @attr: On input, specifies the QP attributes to modify. On output, 1949 * the current values of selected QP attributes are returned. 1950 * @attr_mask: A bit-mask used to specify which attributes of the QP 1951 * are being modified. 1952 * @udata: pointer to user's input output buffer information 1953 * are being modified. 1954 * It returns 0 on success and returns appropriate error code on error. 1955 */ 1956 int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr, 1957 int attr_mask, struct ib_udata *udata) 1958 { 1959 return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata); 1960 } 1961 EXPORT_SYMBOL(ib_modify_qp_with_udata); 1962 1963 static void ib_get_width_and_speed(u32 netdev_speed, u32 lanes, 1964 u16 *speed, u8 *width) 1965 { 1966 if (!lanes) { 1967 if (netdev_speed <= SPEED_1000) { 1968 *width = IB_WIDTH_1X; 1969 *speed = IB_SPEED_SDR; 1970 } else if (netdev_speed <= SPEED_10000) { 1971 *width = IB_WIDTH_1X; 1972 *speed = IB_SPEED_FDR10; 1973 } else if (netdev_speed <= SPEED_20000) { 1974 *width = IB_WIDTH_4X; 1975 *speed = IB_SPEED_DDR; 1976 } else if (netdev_speed <= SPEED_25000) { 1977 *width = IB_WIDTH_1X; 1978 *speed = IB_SPEED_EDR; 1979 } else if (netdev_speed <= SPEED_40000) { 1980 *width = IB_WIDTH_4X; 1981 *speed = IB_SPEED_FDR10; 1982 } else if (netdev_speed <= SPEED_50000) { 1983 *width = IB_WIDTH_2X; 1984 *speed = IB_SPEED_EDR; 1985 } else if (netdev_speed <= SPEED_100000) { 1986 *width = IB_WIDTH_4X; 1987 *speed = IB_SPEED_EDR; 1988 } else if (netdev_speed <= SPEED_200000) { 1989 *width = IB_WIDTH_4X; 1990 *speed = IB_SPEED_HDR; 1991 } else { 1992 *width = IB_WIDTH_4X; 1993 *speed = IB_SPEED_NDR; 1994 } 1995 1996 return; 1997 } 1998 1999 switch (lanes) { 2000 case 1: 2001 *width = IB_WIDTH_1X; 2002 break; 2003 case 2: 2004 *width = IB_WIDTH_2X; 2005 break; 2006 case 4: 2007 *width = IB_WIDTH_4X; 2008 break; 2009 case 8: 2010 *width = IB_WIDTH_8X; 2011 break; 2012 case 12: 2013 *width = IB_WIDTH_12X; 2014 break; 2015 default: 2016 *width = IB_WIDTH_1X; 2017 } 2018 2019 switch (netdev_speed / lanes) { 2020 case SPEED_2500: 2021 *speed = IB_SPEED_SDR; 2022 break; 2023 case SPEED_5000: 2024 *speed = IB_SPEED_DDR; 2025 break; 2026 case SPEED_10000: 2027 *speed = IB_SPEED_FDR10; 2028 break; 2029 case SPEED_14000: 2030 *speed = IB_SPEED_FDR; 2031 break; 2032 case SPEED_25000: 2033 *speed = IB_SPEED_EDR; 2034 break; 2035 case SPEED_50000: 2036 *speed = IB_SPEED_HDR; 2037 break; 2038 case SPEED_100000: 2039 *speed = IB_SPEED_NDR; 2040 break; 2041 default: 2042 *speed = IB_SPEED_SDR; 2043 } 2044 } 2045 2046 int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed, u8 *width) 2047 { 2048 int rc; 2049 u32 netdev_speed; 2050 struct net_device *netdev; 2051 struct ethtool_link_ksettings lksettings = {}; 2052 2053 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET) 2054 return -EINVAL; 2055 2056 netdev = ib_device_get_netdev(dev, port_num); 2057 if (!netdev) 2058 return -ENODEV; 2059 2060 rtnl_lock(); 2061 rc = __ethtool_get_link_ksettings(netdev, &lksettings); 2062 rtnl_unlock(); 2063 2064 dev_put(netdev); 2065 2066 if (!rc && lksettings.base.speed != (u32)SPEED_UNKNOWN) { 2067 netdev_speed = lksettings.base.speed; 2068 } else { 2069 netdev_speed = SPEED_1000; 2070 if (rc) 2071 pr_warn("%s speed is unknown, defaulting to %u\n", 2072 netdev->name, netdev_speed); 2073 } 2074 2075 ib_get_width_and_speed(netdev_speed, lksettings.lanes, 2076 speed, width); 2077 2078 return 0; 2079 } 2080 EXPORT_SYMBOL(ib_get_eth_speed); 2081 2082 int ib_modify_qp(struct ib_qp *qp, 2083 struct ib_qp_attr *qp_attr, 2084 int qp_attr_mask) 2085 { 2086 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL); 2087 } 2088 EXPORT_SYMBOL(ib_modify_qp); 2089 2090 int ib_query_qp(struct ib_qp *qp, 2091 struct ib_qp_attr *qp_attr, 2092 int qp_attr_mask, 2093 struct ib_qp_init_attr *qp_init_attr) 2094 { 2095 qp_attr->ah_attr.grh.sgid_attr = NULL; 2096 qp_attr->alt_ah_attr.grh.sgid_attr = NULL; 2097 2098 return qp->device->ops.query_qp ? 2099 qp->device->ops.query_qp(qp->real_qp, qp_attr, qp_attr_mask, 2100 qp_init_attr) : -EOPNOTSUPP; 2101 } 2102 EXPORT_SYMBOL(ib_query_qp); 2103 2104 int ib_close_qp(struct ib_qp *qp) 2105 { 2106 struct ib_qp *real_qp; 2107 unsigned long flags; 2108 2109 real_qp = qp->real_qp; 2110 if (real_qp == qp) 2111 return -EINVAL; 2112 2113 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags); 2114 list_del(&qp->open_list); 2115 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags); 2116 2117 atomic_dec(&real_qp->usecnt); 2118 if (qp->qp_sec) 2119 ib_close_shared_qp_security(qp->qp_sec); 2120 kfree(qp); 2121 2122 return 0; 2123 } 2124 EXPORT_SYMBOL(ib_close_qp); 2125 2126 static int __ib_destroy_shared_qp(struct ib_qp *qp) 2127 { 2128 struct ib_xrcd *xrcd; 2129 struct ib_qp *real_qp; 2130 int ret; 2131 2132 real_qp = qp->real_qp; 2133 xrcd = real_qp->xrcd; 2134 down_write(&xrcd->tgt_qps_rwsem); 2135 ib_close_qp(qp); 2136 if (atomic_read(&real_qp->usecnt) == 0) 2137 xa_erase(&xrcd->tgt_qps, real_qp->qp_num); 2138 else 2139 real_qp = NULL; 2140 up_write(&xrcd->tgt_qps_rwsem); 2141 2142 if (real_qp) { 2143 ret = ib_destroy_qp(real_qp); 2144 if (!ret) 2145 atomic_dec(&xrcd->usecnt); 2146 } 2147 2148 return 0; 2149 } 2150 2151 int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata) 2152 { 2153 const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr; 2154 const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr; 2155 struct ib_qp_security *sec; 2156 struct ib_comp_cntr *cc; 2157 unsigned long index; 2158 int ret; 2159 2160 WARN_ON_ONCE(qp->mrs_used > 0); 2161 2162 if (atomic_read(&qp->usecnt)) 2163 return -EBUSY; 2164 2165 if (qp->real_qp != qp) 2166 return __ib_destroy_shared_qp(qp); 2167 2168 rdma_restrack_begin_del(&qp->res); 2169 2170 sec = qp->qp_sec; 2171 if (sec) 2172 ib_destroy_qp_security_begin(sec); 2173 2174 if (!qp->uobject) 2175 rdma_rw_cleanup_mrs(qp); 2176 2177 rdma_counter_unbind_qp(qp, qp->port, true); 2178 ret = qp->device->ops.destroy_qp(qp, udata); 2179 if (ret) { 2180 if (sec) 2181 ib_destroy_qp_security_abort(sec); 2182 rdma_restrack_abort_del(&qp->res); 2183 return ret; 2184 } 2185 2186 if (alt_path_sgid_attr) 2187 rdma_put_gid_attr(alt_path_sgid_attr); 2188 if (av_sgid_attr) 2189 rdma_put_gid_attr(av_sgid_attr); 2190 2191 xa_for_each(&qp->comp_cntrs, index, cc) 2192 atomic_dec(&cc->usecnt); 2193 xa_destroy(&qp->comp_cntrs); 2194 2195 ib_qp_usecnt_dec(qp); 2196 if (sec) 2197 ib_destroy_qp_security_end(sec); 2198 2199 rdma_restrack_commit_del(&qp->res); 2200 kfree(qp); 2201 return ret; 2202 } 2203 EXPORT_SYMBOL(ib_destroy_qp_user); 2204 2205 /* Completion queues */ 2206 2207 struct ib_cq *__ib_create_cq(struct ib_device *device, 2208 ib_comp_handler comp_handler, 2209 void (*event_handler)(struct ib_event *, void *), 2210 void *cq_context, 2211 const struct ib_cq_init_attr *cq_attr, 2212 const char *caller) 2213 { 2214 struct ib_cq *cq; 2215 int ret; 2216 2217 if (WARN_ON_ONCE(!cq_attr->cqe)) 2218 return ERR_PTR(-EINVAL); 2219 2220 cq = rdma_zalloc_drv_obj(device, ib_cq); 2221 if (!cq) 2222 return ERR_PTR(-ENOMEM); 2223 2224 cq->device = device; 2225 cq->comp_handler = comp_handler; 2226 cq->event_handler = event_handler; 2227 cq->cq_context = cq_context; 2228 atomic_set(&cq->usecnt, 0); 2229 2230 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 2231 rdma_restrack_set_name(&cq->res, caller); 2232 2233 ret = device->ops.create_cq(cq, cq_attr, NULL); 2234 if (ret) { 2235 rdma_restrack_put(&cq->res); 2236 kfree(cq); 2237 return ERR_PTR(ret); 2238 } 2239 rdma_restrack_add(&cq->res); 2240 return cq; 2241 } 2242 EXPORT_SYMBOL(__ib_create_cq); 2243 2244 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period) 2245 { 2246 if (cq->shared) 2247 return -EOPNOTSUPP; 2248 2249 return cq->device->ops.modify_cq ? 2250 cq->device->ops.modify_cq(cq, cq_count, 2251 cq_period) : -EOPNOTSUPP; 2252 } 2253 EXPORT_SYMBOL(rdma_set_cq_moderation); 2254 2255 int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata) 2256 { 2257 int ret; 2258 2259 if (WARN_ON_ONCE(cq->shared)) 2260 return -EOPNOTSUPP; 2261 2262 if (atomic_read(&cq->usecnt)) 2263 return -EBUSY; 2264 2265 rdma_restrack_begin_del(&cq->res); 2266 2267 ret = cq->device->ops.destroy_cq(cq, udata); 2268 if (ret) { 2269 rdma_restrack_abort_del(&cq->res); 2270 return ret; 2271 } 2272 2273 rdma_restrack_commit_del(&cq->res); 2274 kfree(cq); 2275 return ret; 2276 } 2277 EXPORT_SYMBOL(ib_destroy_cq_user); 2278 2279 /* Memory regions */ 2280 2281 struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 2282 u64 virt_addr, int access_flags) 2283 { 2284 struct ib_mr *mr; 2285 2286 if (access_flags & IB_ACCESS_ON_DEMAND) { 2287 if (!(pd->device->attrs.kernel_cap_flags & 2288 IBK_ON_DEMAND_PAGING)) { 2289 pr_debug("ODP support not available\n"); 2290 return ERR_PTR(-EINVAL); 2291 } 2292 } 2293 2294 mr = pd->device->ops.reg_user_mr(pd, start, length, virt_addr, 2295 access_flags, NULL, NULL); 2296 2297 if (IS_ERR(mr)) 2298 return mr; 2299 2300 mr->device = pd->device; 2301 mr->type = IB_MR_TYPE_USER; 2302 mr->pd = pd; 2303 mr->dm = NULL; 2304 atomic_inc(&pd->usecnt); 2305 mr->iova = virt_addr; 2306 mr->length = length; 2307 2308 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 2309 rdma_restrack_parent_name(&mr->res, &pd->res); 2310 rdma_restrack_add(&mr->res); 2311 2312 return mr; 2313 } 2314 EXPORT_SYMBOL(ib_reg_user_mr); 2315 2316 int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice, 2317 u32 flags, struct ib_sge *sg_list, u32 num_sge) 2318 { 2319 if (!pd->device->ops.advise_mr) 2320 return -EOPNOTSUPP; 2321 2322 if (!num_sge) 2323 return 0; 2324 2325 return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge, 2326 NULL); 2327 } 2328 EXPORT_SYMBOL(ib_advise_mr); 2329 2330 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata) 2331 { 2332 struct ib_pd *pd = mr->pd; 2333 struct ib_dm *dm = mr->dm; 2334 struct ib_dmah *dmah = mr->dmah; 2335 struct ib_sig_attrs *sig_attrs = mr->sig_attrs; 2336 int ret; 2337 2338 trace_mr_dereg(mr); 2339 rdma_restrack_del(&mr->res); 2340 ret = mr->device->ops.dereg_mr(mr, udata); 2341 if (!ret) { 2342 atomic_dec(&pd->usecnt); 2343 if (dm) 2344 atomic_dec(&dm->usecnt); 2345 if (dmah) 2346 atomic_dec(&dmah->usecnt); 2347 kfree(sig_attrs); 2348 } 2349 2350 return ret; 2351 } 2352 EXPORT_SYMBOL(ib_dereg_mr_user); 2353 2354 /** 2355 * ib_alloc_mr() - Allocates a memory region 2356 * @pd: protection domain associated with the region 2357 * @mr_type: memory region type 2358 * @max_num_sg: maximum sg entries available for registration. 2359 * 2360 * Notes: 2361 * Memory registeration page/sg lists must not exceed max_num_sg. 2362 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed 2363 * max_num_sg * used_page_size. 2364 * 2365 */ 2366 struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, 2367 u32 max_num_sg) 2368 { 2369 struct ib_mr *mr; 2370 2371 if (!pd->device->ops.alloc_mr) { 2372 mr = ERR_PTR(-EOPNOTSUPP); 2373 goto out; 2374 } 2375 2376 if (mr_type == IB_MR_TYPE_INTEGRITY) { 2377 WARN_ON_ONCE(1); 2378 mr = ERR_PTR(-EINVAL); 2379 goto out; 2380 } 2381 2382 mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg); 2383 if (IS_ERR(mr)) 2384 goto out; 2385 2386 mr->device = pd->device; 2387 mr->pd = pd; 2388 mr->dm = NULL; 2389 mr->uobject = NULL; 2390 atomic_inc(&pd->usecnt); 2391 mr->need_inval = false; 2392 mr->type = mr_type; 2393 mr->sig_attrs = NULL; 2394 2395 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 2396 rdma_restrack_parent_name(&mr->res, &pd->res); 2397 rdma_restrack_add(&mr->res); 2398 out: 2399 trace_mr_alloc(pd, mr_type, max_num_sg, mr); 2400 return mr; 2401 } 2402 EXPORT_SYMBOL(ib_alloc_mr); 2403 2404 /** 2405 * ib_alloc_mr_integrity() - Allocates an integrity memory region 2406 * @pd: protection domain associated with the region 2407 * @max_num_data_sg: maximum data sg entries available for registration 2408 * @max_num_meta_sg: maximum metadata sg entries available for 2409 * registration 2410 * 2411 * Notes: 2412 * Memory registration page/sg lists must not exceed max_num_sg, 2413 * also the integrity page/sg lists must not exceed max_num_meta_sg. 2414 * 2415 */ 2416 struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd, 2417 u32 max_num_data_sg, 2418 u32 max_num_meta_sg) 2419 { 2420 struct ib_mr *mr; 2421 struct ib_sig_attrs *sig_attrs; 2422 2423 if (!pd->device->ops.alloc_mr_integrity || 2424 !pd->device->ops.map_mr_sg_pi) { 2425 mr = ERR_PTR(-EOPNOTSUPP); 2426 goto out; 2427 } 2428 2429 if (!max_num_meta_sg) { 2430 mr = ERR_PTR(-EINVAL); 2431 goto out; 2432 } 2433 2434 sig_attrs = kzalloc_obj(struct ib_sig_attrs); 2435 if (!sig_attrs) { 2436 mr = ERR_PTR(-ENOMEM); 2437 goto out; 2438 } 2439 2440 mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg, 2441 max_num_meta_sg); 2442 if (IS_ERR(mr)) { 2443 kfree(sig_attrs); 2444 goto out; 2445 } 2446 2447 mr->device = pd->device; 2448 mr->pd = pd; 2449 mr->dm = NULL; 2450 mr->uobject = NULL; 2451 atomic_inc(&pd->usecnt); 2452 mr->need_inval = false; 2453 mr->type = IB_MR_TYPE_INTEGRITY; 2454 mr->sig_attrs = sig_attrs; 2455 2456 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 2457 rdma_restrack_parent_name(&mr->res, &pd->res); 2458 rdma_restrack_add(&mr->res); 2459 out: 2460 trace_mr_integ_alloc(pd, max_num_data_sg, max_num_meta_sg, mr); 2461 return mr; 2462 } 2463 EXPORT_SYMBOL(ib_alloc_mr_integrity); 2464 2465 /* Multicast groups */ 2466 2467 static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid) 2468 { 2469 struct ib_qp_init_attr init_attr = {}; 2470 struct ib_qp_attr attr = {}; 2471 int num_eth_ports = 0; 2472 unsigned int port; 2473 2474 /* If QP state >= init, it is assigned to a port and we can check this 2475 * port only. 2476 */ 2477 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) { 2478 if (attr.qp_state >= IB_QPS_INIT) { 2479 if (rdma_port_get_link_layer(qp->device, attr.port_num) != 2480 IB_LINK_LAYER_INFINIBAND) 2481 return true; 2482 goto lid_check; 2483 } 2484 } 2485 2486 /* Can't get a quick answer, iterate over all ports */ 2487 rdma_for_each_port(qp->device, port) 2488 if (rdma_port_get_link_layer(qp->device, port) != 2489 IB_LINK_LAYER_INFINIBAND) 2490 num_eth_ports++; 2491 2492 /* If we have at lease one Ethernet port, RoCE annex declares that 2493 * multicast LID should be ignored. We can't tell at this step if the 2494 * QP belongs to an IB or Ethernet port. 2495 */ 2496 if (num_eth_ports) 2497 return true; 2498 2499 /* If all the ports are IB, we can check according to IB spec. */ 2500 lid_check: 2501 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || 2502 lid == be16_to_cpu(IB_LID_PERMISSIVE)); 2503 } 2504 2505 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 2506 { 2507 int ret; 2508 2509 if (!qp->device->ops.attach_mcast) 2510 return -EOPNOTSUPP; 2511 2512 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 2513 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 2514 return -EINVAL; 2515 2516 ret = qp->device->ops.attach_mcast(qp, gid, lid); 2517 if (!ret) 2518 atomic_inc(&qp->usecnt); 2519 return ret; 2520 } 2521 EXPORT_SYMBOL(ib_attach_mcast); 2522 2523 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 2524 { 2525 int ret; 2526 2527 if (!qp->device->ops.detach_mcast) 2528 return -EOPNOTSUPP; 2529 2530 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 2531 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 2532 return -EINVAL; 2533 2534 ret = qp->device->ops.detach_mcast(qp, gid, lid); 2535 if (!ret) 2536 atomic_dec(&qp->usecnt); 2537 return ret; 2538 } 2539 EXPORT_SYMBOL(ib_detach_mcast); 2540 2541 /** 2542 * ib_alloc_xrcd_user - Allocates an XRC domain. 2543 * @device: The device on which to allocate the XRC domain. 2544 * @inode: inode to connect XRCD 2545 * @udata: Valid user data or NULL for kernel object 2546 */ 2547 struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device, 2548 struct inode *inode, struct ib_udata *udata) 2549 { 2550 struct ib_xrcd *xrcd; 2551 int ret; 2552 2553 if (!device->ops.alloc_xrcd) 2554 return ERR_PTR(-EOPNOTSUPP); 2555 2556 xrcd = rdma_zalloc_drv_obj(device, ib_xrcd); 2557 if (!xrcd) 2558 return ERR_PTR(-ENOMEM); 2559 2560 xrcd->device = device; 2561 xrcd->inode = inode; 2562 atomic_set(&xrcd->usecnt, 0); 2563 init_rwsem(&xrcd->tgt_qps_rwsem); 2564 xa_init(&xrcd->tgt_qps); 2565 2566 ret = device->ops.alloc_xrcd(xrcd, udata); 2567 if (ret) 2568 goto err; 2569 return xrcd; 2570 err: 2571 kfree(xrcd); 2572 return ERR_PTR(ret); 2573 } 2574 EXPORT_SYMBOL(ib_alloc_xrcd_user); 2575 2576 /** 2577 * ib_dealloc_xrcd_user - Deallocates an XRC domain. 2578 * @xrcd: The XRC domain to deallocate. 2579 * @udata: Valid user data or NULL for kernel object 2580 */ 2581 int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata) 2582 { 2583 int ret; 2584 2585 if (atomic_read(&xrcd->usecnt)) 2586 return -EBUSY; 2587 2588 WARN_ON(!xa_empty(&xrcd->tgt_qps)); 2589 ret = xrcd->device->ops.dealloc_xrcd(xrcd, udata); 2590 if (ret) 2591 return ret; 2592 kfree(xrcd); 2593 return ret; 2594 } 2595 EXPORT_SYMBOL(ib_dealloc_xrcd_user); 2596 2597 /** 2598 * ib_create_wq - Creates a WQ associated with the specified protection 2599 * domain. 2600 * @pd: The protection domain associated with the WQ. 2601 * @wq_attr: A list of initial attributes required to create the 2602 * WQ. If WQ creation succeeds, then the attributes are updated to 2603 * the actual capabilities of the created WQ. 2604 * 2605 * wq_attr->max_wr and wq_attr->max_sge determine 2606 * the requested size of the WQ, and set to the actual values allocated 2607 * on return. 2608 * If ib_create_wq() succeeds, then max_wr and max_sge will always be 2609 * at least as large as the requested values. 2610 */ 2611 struct ib_wq *ib_create_wq(struct ib_pd *pd, 2612 struct ib_wq_init_attr *wq_attr) 2613 { 2614 struct ib_wq *wq; 2615 2616 if (!pd->device->ops.create_wq) 2617 return ERR_PTR(-EOPNOTSUPP); 2618 2619 wq = pd->device->ops.create_wq(pd, wq_attr, NULL); 2620 if (!IS_ERR(wq)) { 2621 wq->event_handler = wq_attr->event_handler; 2622 wq->wq_context = wq_attr->wq_context; 2623 wq->wq_type = wq_attr->wq_type; 2624 wq->cq = wq_attr->cq; 2625 wq->device = pd->device; 2626 wq->pd = pd; 2627 wq->uobject = NULL; 2628 atomic_inc(&pd->usecnt); 2629 atomic_inc(&wq_attr->cq->usecnt); 2630 atomic_set(&wq->usecnt, 0); 2631 } 2632 return wq; 2633 } 2634 EXPORT_SYMBOL(ib_create_wq); 2635 2636 /** 2637 * ib_destroy_wq_user - Destroys the specified user WQ. 2638 * @wq: The WQ to destroy. 2639 * @udata: Valid user data 2640 */ 2641 int ib_destroy_wq_user(struct ib_wq *wq, struct ib_udata *udata) 2642 { 2643 struct ib_cq *cq = wq->cq; 2644 struct ib_pd *pd = wq->pd; 2645 int ret; 2646 2647 if (atomic_read(&wq->usecnt)) 2648 return -EBUSY; 2649 2650 ret = wq->device->ops.destroy_wq(wq, udata); 2651 if (ret) 2652 return ret; 2653 2654 atomic_dec(&pd->usecnt); 2655 atomic_dec(&cq->usecnt); 2656 return ret; 2657 } 2658 EXPORT_SYMBOL(ib_destroy_wq_user); 2659 2660 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 2661 struct ib_mr_status *mr_status) 2662 { 2663 if (!mr->device->ops.check_mr_status) 2664 return -EOPNOTSUPP; 2665 2666 return mr->device->ops.check_mr_status(mr, check_mask, mr_status); 2667 } 2668 EXPORT_SYMBOL(ib_check_mr_status); 2669 2670 int ib_set_vf_link_state(struct ib_device *device, int vf, u32 port, 2671 int state) 2672 { 2673 if (!device->ops.set_vf_link_state) 2674 return -EOPNOTSUPP; 2675 2676 return device->ops.set_vf_link_state(device, vf, port, state); 2677 } 2678 EXPORT_SYMBOL(ib_set_vf_link_state); 2679 2680 int ib_get_vf_config(struct ib_device *device, int vf, u32 port, 2681 struct ifla_vf_info *info) 2682 { 2683 if (!device->ops.get_vf_config) 2684 return -EOPNOTSUPP; 2685 2686 return device->ops.get_vf_config(device, vf, port, info); 2687 } 2688 EXPORT_SYMBOL(ib_get_vf_config); 2689 2690 int ib_get_vf_stats(struct ib_device *device, int vf, u32 port, 2691 struct ifla_vf_stats *stats) 2692 { 2693 if (!device->ops.get_vf_stats) 2694 return -EOPNOTSUPP; 2695 2696 return device->ops.get_vf_stats(device, vf, port, stats); 2697 } 2698 EXPORT_SYMBOL(ib_get_vf_stats); 2699 2700 int ib_set_vf_guid(struct ib_device *device, int vf, u32 port, u64 guid, 2701 int type) 2702 { 2703 if (!device->ops.set_vf_guid) 2704 return -EOPNOTSUPP; 2705 2706 return device->ops.set_vf_guid(device, vf, port, guid, type); 2707 } 2708 EXPORT_SYMBOL(ib_set_vf_guid); 2709 2710 int ib_get_vf_guid(struct ib_device *device, int vf, u32 port, 2711 struct ifla_vf_guid *node_guid, 2712 struct ifla_vf_guid *port_guid) 2713 { 2714 if (!device->ops.get_vf_guid) 2715 return -EOPNOTSUPP; 2716 2717 return device->ops.get_vf_guid(device, vf, port, node_guid, port_guid); 2718 } 2719 EXPORT_SYMBOL(ib_get_vf_guid); 2720 /** 2721 * ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection 2722 * information) and set an appropriate memory region for registration. 2723 * @mr: memory region 2724 * @data_sg: dma mapped scatterlist for data 2725 * @data_sg_nents: number of entries in data_sg 2726 * @data_sg_offset: offset in bytes into data_sg 2727 * @meta_sg: dma mapped scatterlist for metadata 2728 * @meta_sg_nents: number of entries in meta_sg 2729 * @meta_sg_offset: offset in bytes into meta_sg 2730 * @page_size: page vector desired page size 2731 * 2732 * Constraints: 2733 * - The MR must be allocated with type IB_MR_TYPE_INTEGRITY. 2734 * 2735 * Return: 0 on success. 2736 * 2737 * After this completes successfully, the memory region 2738 * is ready for registration. 2739 */ 2740 int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg, 2741 int data_sg_nents, unsigned int *data_sg_offset, 2742 struct scatterlist *meta_sg, int meta_sg_nents, 2743 unsigned int *meta_sg_offset, unsigned int page_size) 2744 { 2745 if (unlikely(!mr->device->ops.map_mr_sg_pi || 2746 WARN_ON_ONCE(mr->type != IB_MR_TYPE_INTEGRITY))) 2747 return -EOPNOTSUPP; 2748 2749 mr->page_size = page_size; 2750 2751 return mr->device->ops.map_mr_sg_pi(mr, data_sg, data_sg_nents, 2752 data_sg_offset, meta_sg, 2753 meta_sg_nents, meta_sg_offset); 2754 } 2755 EXPORT_SYMBOL(ib_map_mr_sg_pi); 2756 2757 /** 2758 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list 2759 * and set it the memory region. 2760 * @mr: memory region 2761 * @sg: dma mapped scatterlist 2762 * @sg_nents: number of entries in sg 2763 * @sg_offset: offset in bytes into sg 2764 * @page_size: page vector desired page size 2765 * 2766 * Constraints: 2767 * 2768 * - The first sg element is allowed to have an offset. 2769 * - Each sg element must either be aligned to page_size or virtually 2770 * contiguous to the previous element. In case an sg element has a 2771 * non-contiguous offset, the mapping prefix will not include it. 2772 * - The last sg element is allowed to have length less than page_size. 2773 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size 2774 * then only max_num_sg entries will be mapped. 2775 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these 2776 * constraints holds and the page_size argument is ignored. 2777 * 2778 * Returns the number of sg elements that were mapped to the memory region. 2779 * 2780 * After this completes successfully, the memory region 2781 * is ready for registration. 2782 */ 2783 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 2784 unsigned int *sg_offset, unsigned int page_size) 2785 { 2786 if (unlikely(!mr->device->ops.map_mr_sg)) 2787 return -EOPNOTSUPP; 2788 2789 mr->page_size = page_size; 2790 2791 return mr->device->ops.map_mr_sg(mr, sg, sg_nents, sg_offset); 2792 } 2793 EXPORT_SYMBOL(ib_map_mr_sg); 2794 2795 /** 2796 * ib_sg_to_pages() - Convert the largest prefix of a sg list 2797 * to a page vector 2798 * @mr: memory region 2799 * @sgl: dma mapped scatterlist 2800 * @sg_nents: number of entries in sg 2801 * @sg_offset_p: ==== ======================================================= 2802 * IN start offset in bytes into sg 2803 * OUT offset in bytes for element n of the sg of the first 2804 * byte that has not been processed where n is the return 2805 * value of this function. 2806 * ==== ======================================================= 2807 * @set_page: driver page assignment function pointer 2808 * 2809 * Core service helper for drivers to convert the largest 2810 * prefix of given sg list to a page vector. The sg list 2811 * prefix converted is the prefix that meet the requirements 2812 * of ib_map_mr_sg. 2813 * 2814 * Returns the number of sg elements that were assigned to 2815 * a page vector. 2816 */ 2817 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 2818 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64)) 2819 { 2820 struct scatterlist *sg; 2821 u64 last_end_dma_addr = 0; 2822 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0; 2823 unsigned int last_page_off = 0; 2824 u64 page_mask = ~((u64)mr->page_size - 1); 2825 int i, ret; 2826 2827 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0]))) 2828 return -EINVAL; 2829 2830 mr->iova = sg_dma_address(&sgl[0]) + sg_offset; 2831 mr->length = 0; 2832 2833 for_each_sg(sgl, sg, sg_nents, i) { 2834 u64 dma_addr = sg_dma_address(sg) + sg_offset; 2835 u64 prev_addr = dma_addr; 2836 unsigned int dma_len = sg_dma_len(sg) - sg_offset; 2837 u64 end_dma_addr = dma_addr + dma_len; 2838 u64 page_addr = dma_addr & page_mask; 2839 2840 /* 2841 * For the second and later elements, check whether either the 2842 * end of element i-1 or the start of element i is not aligned 2843 * on a page boundary. 2844 */ 2845 if (i && (last_page_off != 0 || page_addr != dma_addr)) { 2846 /* Stop mapping if there is a gap. */ 2847 if (last_end_dma_addr != dma_addr) 2848 break; 2849 2850 /* 2851 * Coalesce this element with the last. If it is small 2852 * enough just update mr->length. Otherwise start 2853 * mapping from the next page. 2854 */ 2855 goto next_page; 2856 } 2857 2858 do { 2859 ret = set_page(mr, page_addr); 2860 if (unlikely(ret < 0)) { 2861 sg_offset = prev_addr - sg_dma_address(sg); 2862 mr->length += prev_addr - dma_addr; 2863 if (sg_offset_p) 2864 *sg_offset_p = sg_offset; 2865 return i || sg_offset ? i : ret; 2866 } 2867 prev_addr = page_addr; 2868 next_page: 2869 page_addr += mr->page_size; 2870 } while (page_addr < end_dma_addr); 2871 2872 mr->length += dma_len; 2873 last_end_dma_addr = end_dma_addr; 2874 last_page_off = end_dma_addr & ~page_mask; 2875 2876 sg_offset = 0; 2877 } 2878 2879 if (sg_offset_p) 2880 *sg_offset_p = 0; 2881 return i; 2882 } 2883 EXPORT_SYMBOL(ib_sg_to_pages); 2884 2885 struct ib_drain_cqe { 2886 struct ib_cqe cqe; 2887 struct completion done; 2888 }; 2889 2890 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc) 2891 { 2892 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe, 2893 cqe); 2894 2895 complete(&cqe->done); 2896 } 2897 2898 /* 2899 * Post a WR and block until its completion is reaped for the SQ. 2900 */ 2901 static void __ib_drain_sq(struct ib_qp *qp) 2902 { 2903 struct ib_cq *cq = qp->send_cq; 2904 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2905 struct ib_drain_cqe sdrain; 2906 struct ib_rdma_wr swr = { 2907 .wr = { 2908 .next = NULL, 2909 { .wr_cqe = &sdrain.cqe, }, 2910 .opcode = IB_WR_RDMA_WRITE, 2911 }, 2912 }; 2913 int ret; 2914 2915 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2916 if (ret) { 2917 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2918 return; 2919 } 2920 2921 sdrain.cqe.done = ib_drain_qp_done; 2922 init_completion(&sdrain.done); 2923 2924 ret = ib_post_send(qp, &swr.wr, NULL); 2925 if (ret) { 2926 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2927 return; 2928 } 2929 2930 if (cq->poll_ctx == IB_POLL_DIRECT) 2931 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0) 2932 ib_process_cq_direct(cq, -1); 2933 else 2934 wait_for_completion(&sdrain.done); 2935 } 2936 2937 /* 2938 * Post a WR and block until its completion is reaped for the RQ. 2939 */ 2940 static void __ib_drain_rq(struct ib_qp *qp) 2941 { 2942 struct ib_cq *cq = qp->recv_cq; 2943 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2944 struct ib_drain_cqe rdrain; 2945 struct ib_recv_wr rwr = {}; 2946 int ret; 2947 2948 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2949 if (ret) { 2950 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2951 return; 2952 } 2953 2954 rwr.wr_cqe = &rdrain.cqe; 2955 rdrain.cqe.done = ib_drain_qp_done; 2956 init_completion(&rdrain.done); 2957 2958 ret = ib_post_recv(qp, &rwr, NULL); 2959 if (ret) { 2960 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2961 return; 2962 } 2963 2964 if (cq->poll_ctx == IB_POLL_DIRECT) 2965 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0) 2966 ib_process_cq_direct(cq, -1); 2967 else 2968 wait_for_completion(&rdrain.done); 2969 } 2970 2971 /* 2972 * __ib_drain_srq() - Block until Last WQE Reached event arrives, or timeout 2973 * expires. 2974 * @qp: queue pair associated with SRQ to drain 2975 * 2976 * Quoting 10.3.1 Queue Pair and EE Context States: 2977 * 2978 * Note, for QPs that are associated with an SRQ, the Consumer should take the 2979 * QP through the Error State before invoking a Destroy QP or a Modify QP to the 2980 * Reset State. The Consumer may invoke the Destroy QP without first performing 2981 * a Modify QP to the Error State and waiting for the Affiliated Asynchronous 2982 * Last WQE Reached Event. However, if the Consumer does not wait for the 2983 * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment 2984 * leakage may occur. Therefore, it is good programming practice to tear down a 2985 * QP that is associated with an SRQ by using the following process: 2986 * 2987 * - Put the QP in the Error State 2988 * - Wait for the Affiliated Asynchronous Last WQE Reached Event; 2989 * - either: 2990 * drain the CQ by invoking the Poll CQ verb and either wait for CQ 2991 * to be empty or the number of Poll CQ operations has exceeded 2992 * CQ capacity size; 2993 * - or 2994 * post another WR that completes on the same CQ and wait for this 2995 * WR to return as a WC; 2996 * - and then invoke a Destroy QP or Reset QP. 2997 * 2998 * We use the first option. 2999 */ 3000 static void __ib_drain_srq(struct ib_qp *qp) 3001 { 3002 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 3003 struct ib_cq *cq; 3004 int n, polled = 0; 3005 int ret; 3006 3007 if (!qp->srq) { 3008 WARN_ONCE(1, "QP 0x%p is not associated with SRQ\n", qp); 3009 return; 3010 } 3011 3012 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 3013 if (ret) { 3014 WARN_ONCE(ret, "failed to drain shared recv queue: %d\n", ret); 3015 return; 3016 } 3017 3018 if (ib_srq_has_cq(qp->srq->srq_type)) { 3019 cq = qp->srq->ext.cq; 3020 } else if (qp->recv_cq) { 3021 cq = qp->recv_cq; 3022 } else { 3023 WARN_ONCE(1, "QP 0x%p has no CQ associated with SRQ\n", qp); 3024 return; 3025 } 3026 3027 if (wait_for_completion_timeout(&qp->srq_completion, 60 * HZ) > 0) { 3028 while (polled != cq->cqe) { 3029 n = ib_process_cq_direct(cq, cq->cqe - polled); 3030 if (!n) 3031 return; 3032 polled += n; 3033 } 3034 } 3035 } 3036 3037 /** 3038 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the 3039 * application. 3040 * @qp: queue pair to drain 3041 * 3042 * If the device has a provider-specific drain function, then 3043 * call that. Otherwise call the generic drain function 3044 * __ib_drain_sq(). 3045 * 3046 * The caller must: 3047 * 3048 * ensure there is room in the CQ and SQ for the drain work request and 3049 * completion. 3050 * 3051 * allocate the CQ using ib_alloc_cq(). 3052 * 3053 * ensure that there are no other contexts that are posting WRs concurrently. 3054 * Otherwise the drain is not guaranteed. 3055 */ 3056 void ib_drain_sq(struct ib_qp *qp) 3057 { 3058 if (qp->device->ops.drain_sq) 3059 qp->device->ops.drain_sq(qp); 3060 else 3061 __ib_drain_sq(qp); 3062 trace_cq_drain_complete(qp->send_cq); 3063 } 3064 EXPORT_SYMBOL(ib_drain_sq); 3065 3066 /** 3067 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the 3068 * application. 3069 * @qp: queue pair to drain 3070 * 3071 * If the device has a provider-specific drain function, then 3072 * call that. Otherwise call the generic drain function 3073 * __ib_drain_rq(). 3074 * 3075 * The caller must: 3076 * 3077 * ensure there is room in the CQ and RQ for the drain work request and 3078 * completion. 3079 * 3080 * allocate the CQ using ib_alloc_cq(). 3081 * 3082 * ensure that there are no other contexts that are posting WRs concurrently. 3083 * Otherwise the drain is not guaranteed. 3084 */ 3085 void ib_drain_rq(struct ib_qp *qp) 3086 { 3087 if (qp->device->ops.drain_rq) 3088 qp->device->ops.drain_rq(qp); 3089 else 3090 __ib_drain_rq(qp); 3091 trace_cq_drain_complete(qp->recv_cq); 3092 } 3093 EXPORT_SYMBOL(ib_drain_rq); 3094 3095 /** 3096 * ib_drain_qp() - Block until all CQEs have been consumed by the 3097 * application on both the RQ and SQ. 3098 * @qp: queue pair to drain 3099 * 3100 * The caller must: 3101 * 3102 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests 3103 * and completions. 3104 * 3105 * allocate the CQs using ib_alloc_cq(). 3106 * 3107 * ensure that there are no other contexts that are posting WRs concurrently. 3108 * Otherwise the drain is not guaranteed. 3109 */ 3110 void ib_drain_qp(struct ib_qp *qp) 3111 { 3112 ib_drain_sq(qp); 3113 if (!qp->srq) 3114 ib_drain_rq(qp); 3115 else 3116 __ib_drain_srq(qp); 3117 } 3118 EXPORT_SYMBOL(ib_drain_qp); 3119 3120 struct net_device *rdma_alloc_netdev(struct ib_device *device, u32 port_num, 3121 enum rdma_netdev_t type, const char *name, 3122 unsigned char name_assign_type, 3123 void (*setup)(struct net_device *)) 3124 { 3125 struct rdma_netdev_alloc_params params; 3126 struct net_device *netdev; 3127 int rc; 3128 3129 if (!device->ops.rdma_netdev_get_params) 3130 return ERR_PTR(-EOPNOTSUPP); 3131 3132 rc = device->ops.rdma_netdev_get_params(device, port_num, type, 3133 ¶ms); 3134 if (rc) 3135 return ERR_PTR(rc); 3136 3137 netdev = alloc_netdev_mqs(params.sizeof_priv, name, name_assign_type, 3138 setup, params.txqs, params.rxqs); 3139 if (!netdev) 3140 return ERR_PTR(-ENOMEM); 3141 3142 return netdev; 3143 } 3144 EXPORT_SYMBOL(rdma_alloc_netdev); 3145 3146 int rdma_init_netdev(struct ib_device *device, u32 port_num, 3147 enum rdma_netdev_t type, const char *name, 3148 unsigned char name_assign_type, 3149 void (*setup)(struct net_device *), 3150 struct net_device *netdev) 3151 { 3152 struct rdma_netdev_alloc_params params; 3153 int rc; 3154 3155 if (!device->ops.rdma_netdev_get_params) 3156 return -EOPNOTSUPP; 3157 3158 rc = device->ops.rdma_netdev_get_params(device, port_num, type, 3159 ¶ms); 3160 if (rc) 3161 return rc; 3162 3163 return params.initialize_rdma_netdev(device, port_num, 3164 netdev, params.param); 3165 } 3166 EXPORT_SYMBOL(rdma_init_netdev); 3167 3168 /** 3169 * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct 3170 * for the drivers. 3171 * @descs: array of static descriptors 3172 * @num_counters: number of elements in array 3173 * @lifespan: milliseconds between updates 3174 */ 3175 struct rdma_hw_stats *rdma_alloc_hw_stats_struct( 3176 const struct rdma_stat_desc *descs, int num_counters, 3177 unsigned long lifespan) 3178 { 3179 struct rdma_hw_stats *stats; 3180 3181 stats = kzalloc_flex(*stats, value, num_counters); 3182 if (!stats) 3183 return NULL; 3184 3185 stats->is_disabled = kcalloc(BITS_TO_LONGS(num_counters), 3186 sizeof(*stats->is_disabled), GFP_KERNEL); 3187 if (!stats->is_disabled) 3188 goto err; 3189 3190 stats->descs = descs; 3191 stats->num_counters = num_counters; 3192 stats->lifespan = msecs_to_jiffies(lifespan); 3193 mutex_init(&stats->lock); 3194 3195 return stats; 3196 3197 err: 3198 kfree(stats); 3199 return NULL; 3200 } 3201 EXPORT_SYMBOL(rdma_alloc_hw_stats_struct); 3202 3203 /** 3204 * rdma_free_hw_stats_struct - Helper function to release rdma_hw_stats 3205 * @stats: statistics to release 3206 */ 3207 void rdma_free_hw_stats_struct(struct rdma_hw_stats *stats) 3208 { 3209 if (!stats) 3210 return; 3211 3212 kfree(stats->is_disabled); 3213 kfree(stats); 3214 } 3215 EXPORT_SYMBOL(rdma_free_hw_stats_struct); 3216