FILE
verbs.c
File preview with syntax highlighting.
linux-6.19.14/drivers/infiniband/core/verbs.c
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/rw.h> 53#include <rdma/lag.h> 54 55#include "core_priv.h" 56#include <trace/events/rdma_core.h> 57 58static int ib_resolve_eth_dmac(struct ib_device *device, 59 struct rdma_ah_attr *ah_attr); 60 61static const char * const ib_events[] = { 62 [IB_EVENT_CQ_ERR] = "CQ error", 63 [IB_EVENT_QP_FATAL] = "QP fatal error", 64 [IB_EVENT_QP_REQ_ERR] = "QP request error", 65 [IB_EVENT_QP_ACCESS_ERR] = "QP access error", 66 [IB_EVENT_COMM_EST] = "communication established", 67 [IB_EVENT_SQ_DRAINED] = "send queue drained", 68 [IB_EVENT_PATH_MIG] = "path migration successful", 69 [IB_EVENT_PATH_MIG_ERR] = "path migration error", 70 [IB_EVENT_DEVICE_FATAL] = "device fatal error", 71 [IB_EVENT_PORT_ACTIVE] = "port active", 72 [IB_EVENT_PORT_ERR] = "port error", 73 [IB_EVENT_LID_CHANGE] = "LID change", 74 [IB_EVENT_PKEY_CHANGE] = "P_key change", 75 [IB_EVENT_SM_CHANGE] = "SM change", 76 [IB_EVENT_SRQ_ERR] = "SRQ error", 77 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached", 78 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached", 79 [IB_EVENT_CLIENT_REREGISTER] = "client reregister", 80 [IB_EVENT_GID_CHANGE] = "GID changed", 81}; 82 83const char *__attribute_const__ ib_event_msg(enum ib_event_type event) 84{ 85 size_t index = event; 86 87 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ? 88 ib_events[index] : "unrecognized event"; 89} 90EXPORT_SYMBOL(ib_event_msg); 91 92static const char * const wc_statuses[] = { 93 [IB_WC_SUCCESS] = "success", 94 [IB_WC_LOC_LEN_ERR] = "local length error", 95 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error", 96 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error", 97 [IB_WC_LOC_PROT_ERR] = "local protection error", 98 [IB_WC_WR_FLUSH_ERR] = "WR flushed", 99 [IB_WC_MW_BIND_ERR] = "memory bind operation error", 100 [IB_WC_BAD_RESP_ERR] = "bad response error", 101 [IB_WC_LOC_ACCESS_ERR] = "local access error", 102 [IB_WC_REM_INV_REQ_ERR] = "remote invalid request error", 103 [IB_WC_REM_ACCESS_ERR] = "remote access error", 104 [IB_WC_REM_OP_ERR] = "remote operation error", 105 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded", 106 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded", 107 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error", 108 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request", 109 [IB_WC_REM_ABORT_ERR] = "operation aborted", 110 [IB_WC_INV_EECN_ERR] = "invalid EE context number", 111 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state", 112 [IB_WC_FATAL_ERR] = "fatal error", 113 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error", 114 [IB_WC_GENERAL_ERR] = "general error", 115}; 116 117const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status) 118{ 119 size_t index = status; 120 121 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ? 122 wc_statuses[index] : "unrecognized status"; 123} 124EXPORT_SYMBOL(ib_wc_status_msg); 125 126__attribute_const__ int ib_rate_to_mult(enum ib_rate rate) 127{ 128 switch (rate) { 129 case IB_RATE_2_5_GBPS: return 1; 130 case IB_RATE_5_GBPS: return 2; 131 case IB_RATE_10_GBPS: return 4; 132 case IB_RATE_20_GBPS: return 8; 133 case IB_RATE_30_GBPS: return 12; 134 case IB_RATE_40_GBPS: return 16; 135 case IB_RATE_60_GBPS: return 24; 136 case IB_RATE_80_GBPS: return 32; 137 case IB_RATE_120_GBPS: return 48; 138 case IB_RATE_14_GBPS: return 6; 139 case IB_RATE_56_GBPS: return 22; 140 case IB_RATE_112_GBPS: return 45; 141 case IB_RATE_168_GBPS: return 67; 142 case IB_RATE_25_GBPS: return 10; 143 case IB_RATE_100_GBPS: return 40; 144 case IB_RATE_200_GBPS: return 80; 145 case IB_RATE_300_GBPS: return 120; 146 case IB_RATE_28_GBPS: return 11; 147 case IB_RATE_50_GBPS: return 20; 148 case IB_RATE_400_GBPS: return 160; 149 case IB_RATE_600_GBPS: return 240; 150 case IB_RATE_800_GBPS: return 320; 151 case IB_RATE_1600_GBPS: return 640; 152 default: return -1; 153 } 154} 155EXPORT_SYMBOL(ib_rate_to_mult); 156 157__attribute_const__ enum ib_rate mult_to_ib_rate(int mult) 158{ 159 switch (mult) { 160 case 1: return IB_RATE_2_5_GBPS; 161 case 2: return IB_RATE_5_GBPS; 162 case 4: return IB_RATE_10_GBPS; 163 case 8: return IB_RATE_20_GBPS; 164 case 12: return IB_RATE_30_GBPS; 165 case 16: return IB_RATE_40_GBPS; 166 case 24: return IB_RATE_60_GBPS; 167 case 32: return IB_RATE_80_GBPS; 168 case 48: return IB_RATE_120_GBPS; 169 case 6: return IB_RATE_14_GBPS; 170 case 22: return IB_RATE_56_GBPS; 171 case 45: return IB_RATE_112_GBPS; 172 case 67: return IB_RATE_168_GBPS; 173 case 10: return IB_RATE_25_GBPS; 174 case 40: return IB_RATE_100_GBPS; 175 case 80: return IB_RATE_200_GBPS; 176 case 120: return IB_RATE_300_GBPS; 177 case 11: return IB_RATE_28_GBPS; 178 case 20: return IB_RATE_50_GBPS; 179 case 160: return IB_RATE_400_GBPS; 180 case 240: return IB_RATE_600_GBPS; 181 case 320: return IB_RATE_800_GBPS; 182 case 640: return IB_RATE_1600_GBPS; 183 default: return IB_RATE_PORT_CURRENT; 184 } 185} 186EXPORT_SYMBOL(mult_to_ib_rate); 187 188__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate) 189{ 190 switch (rate) { 191 case IB_RATE_2_5_GBPS: return 2500; 192 case IB_RATE_5_GBPS: return 5000; 193 case IB_RATE_10_GBPS: return 10000; 194 case IB_RATE_20_GBPS: return 20000; 195 case IB_RATE_30_GBPS: return 30000; 196 case IB_RATE_40_GBPS: return 40000; 197 case IB_RATE_60_GBPS: return 60000; 198 case IB_RATE_80_GBPS: return 80000; 199 case IB_RATE_120_GBPS: return 120000; 200 case IB_RATE_14_GBPS: return 14062; 201 case IB_RATE_56_GBPS: return 56250; 202 case IB_RATE_112_GBPS: return 112500; 203 case IB_RATE_168_GBPS: return 168750; 204 case IB_RATE_25_GBPS: return 25781; 205 case IB_RATE_100_GBPS: return 103125; 206 case IB_RATE_200_GBPS: return 206250; 207 case IB_RATE_300_GBPS: return 309375; 208 case IB_RATE_28_GBPS: return 28125; 209 case IB_RATE_50_GBPS: return 53125; 210 case IB_RATE_400_GBPS: return 425000; 211 case IB_RATE_600_GBPS: return 637500; 212 case IB_RATE_800_GBPS: return 850000; 213 case IB_RATE_1600_GBPS: return 1700000; 214 default: return -1; 215 } 216} 217EXPORT_SYMBOL(ib_rate_to_mbps); 218 219__attribute_const__ enum rdma_transport_type 220rdma_node_get_transport(unsigned int node_type) 221{ 222 223 if (node_type == RDMA_NODE_USNIC) 224 return RDMA_TRANSPORT_USNIC; 225 if (node_type == RDMA_NODE_USNIC_UDP) 226 return RDMA_TRANSPORT_USNIC_UDP; 227 if (node_type == RDMA_NODE_RNIC) 228 return RDMA_TRANSPORT_IWARP; 229 if (node_type == RDMA_NODE_UNSPECIFIED) 230 return RDMA_TRANSPORT_UNSPECIFIED; 231 232 return RDMA_TRANSPORT_IB; 233} 234EXPORT_SYMBOL(rdma_node_get_transport); 235 236enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, 237 u32 port_num) 238{ 239 enum rdma_transport_type lt; 240 if (device->ops.get_link_layer) 241 return device->ops.get_link_layer(device, port_num); 242 243 lt = rdma_node_get_transport(device->node_type); 244 if (lt == RDMA_TRANSPORT_IB) 245 return IB_LINK_LAYER_INFINIBAND; 246 247 return IB_LINK_LAYER_ETHERNET; 248} 249EXPORT_SYMBOL(rdma_port_get_link_layer); 250 251/* Protection domains */ 252 253/** 254 * __ib_alloc_pd - Allocates an unused protection domain. 255 * @device: The device on which to allocate the protection domain. 256 * @flags: protection domain flags 257 * @caller: caller's build-time module name 258 * 259 * A protection domain object provides an association between QPs, shared 260 * receive queues, address handles, memory regions, and memory windows. 261 * 262 * Every PD has a local_dma_lkey which can be used as the lkey value for local 263 * memory operations. 264 */ 265struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 266 const char *caller) 267{ 268 struct ib_pd *pd; 269 int mr_access_flags = 0; 270 int ret; 271 272 pd = rdma_zalloc_drv_obj(device, ib_pd); 273 if (!pd) 274 return ERR_PTR(-ENOMEM); 275 276 pd->device = device; 277 pd->flags = flags; 278 279 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD); 280 rdma_restrack_set_name(&pd->res, caller); 281 282 ret = device->ops.alloc_pd(pd, NULL); 283 if (ret) { 284 rdma_restrack_put(&pd->res); 285 kfree(pd); 286 return ERR_PTR(ret); 287 } 288 rdma_restrack_add(&pd->res); 289 290 if (device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY) 291 pd->local_dma_lkey = device->local_dma_lkey; 292 else 293 mr_access_flags |= IB_ACCESS_LOCAL_WRITE; 294 295 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) { 296 pr_warn("%s: enabling unsafe global rkey\n", caller); 297 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE; 298 } 299 300 if (mr_access_flags) { 301 struct ib_mr *mr; 302 303 mr = pd->device->ops.get_dma_mr(pd, mr_access_flags); 304 if (IS_ERR(mr)) { 305 ib_dealloc_pd(pd); 306 return ERR_CAST(mr); 307 } 308 309 mr->device = pd->device; 310 mr->pd = pd; 311 mr->type = IB_MR_TYPE_DMA; 312 mr->uobject = NULL; 313 mr->need_inval = false; 314 315 pd->__internal_mr = mr; 316 317 if (!(device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY)) 318 pd->local_dma_lkey = pd->__internal_mr->lkey; 319 320 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) 321 pd->unsafe_global_rkey = pd->__internal_mr->rkey; 322 } 323 324 return pd; 325} 326EXPORT_SYMBOL(__ib_alloc_pd); 327 328/** 329 * ib_dealloc_pd_user - Deallocates a protection domain. 330 * @pd: The protection domain to deallocate. 331 * @udata: Valid user data or NULL for kernel object 332 * 333 * It is an error to call this function while any resources in the pd still 334 * exist. The caller is responsible to synchronously destroy them and 335 * guarantee no new allocations will happen. 336 */ 337int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata) 338{ 339 int ret; 340 341 if (pd->__internal_mr) { 342 ret = pd->device->ops.dereg_mr(pd->__internal_mr, NULL); 343 WARN_ON(ret); 344 pd->__internal_mr = NULL; 345 } 346 347 ret = pd->device->ops.dealloc_pd(pd, udata); 348 if (ret) 349 return ret; 350 351 rdma_restrack_del(&pd->res); 352 kfree(pd); 353 return ret; 354} 355EXPORT_SYMBOL(ib_dealloc_pd_user); 356 357/* Address handles */ 358 359/** 360 * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination. 361 * @dest: Pointer to destination ah_attr. Contents of the destination 362 * pointer is assumed to be invalid and attribute are overwritten. 363 * @src: Pointer to source ah_attr. 364 */ 365void rdma_copy_ah_attr(struct rdma_ah_attr *dest, 366 const struct rdma_ah_attr *src) 367{ 368 *dest = *src; 369 if (dest->grh.sgid_attr) 370 rdma_hold_gid_attr(dest->grh.sgid_attr); 371} 372EXPORT_SYMBOL(rdma_copy_ah_attr); 373 374/** 375 * rdma_replace_ah_attr - Replace valid ah_attr with new one. 376 * @old: Pointer to existing ah_attr which needs to be replaced. 377 * old is assumed to be valid or zero'd 378 * @new: Pointer to the new ah_attr. 379 * 380 * rdma_replace_ah_attr() first releases any reference in the old ah_attr if 381 * old the ah_attr is valid; after that it copies the new attribute and holds 382 * the reference to the replaced ah_attr. 383 */ 384void rdma_replace_ah_attr(struct rdma_ah_attr *old, 385 const struct rdma_ah_attr *new) 386{ 387 rdma_destroy_ah_attr(old); 388 *old = *new; 389 if (old->grh.sgid_attr) 390 rdma_hold_gid_attr(old->grh.sgid_attr); 391} 392EXPORT_SYMBOL(rdma_replace_ah_attr); 393 394/** 395 * rdma_move_ah_attr - Move ah_attr pointed by source to destination. 396 * @dest: Pointer to destination ah_attr to copy to. 397 * dest is assumed to be valid or zero'd 398 * @src: Pointer to the new ah_attr. 399 * 400 * rdma_move_ah_attr() first releases any reference in the destination ah_attr 401 * if it is valid. This also transfers ownership of internal references from 402 * src to dest, making src invalid in the process. No new reference of the src 403 * ah_attr is taken. 404 */ 405void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src) 406{ 407 rdma_destroy_ah_attr(dest); 408 *dest = *src; 409 src->grh.sgid_attr = NULL; 410} 411EXPORT_SYMBOL(rdma_move_ah_attr); 412 413/* 414 * Validate that the rdma_ah_attr is valid for the device before passing it 415 * off to the driver. 416 */ 417static int rdma_check_ah_attr(struct ib_device *device, 418 struct rdma_ah_attr *ah_attr) 419{ 420 if (!rdma_is_port_valid(device, ah_attr->port_num)) 421 return -EINVAL; 422 423 if ((rdma_is_grh_required(device, ah_attr->port_num) || 424 ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) && 425 !(ah_attr->ah_flags & IB_AH_GRH)) 426 return -EINVAL; 427 428 if (ah_attr->grh.sgid_attr) { 429 /* 430 * Make sure the passed sgid_attr is consistent with the 431 * parameters 432 */ 433 if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index || 434 ah_attr->grh.sgid_attr->port_num != ah_attr->port_num) 435 return -EINVAL; 436 } 437 return 0; 438} 439 440/* 441 * If the ah requires a GRH then ensure that sgid_attr pointer is filled in. 442 * On success the caller is responsible to call rdma_unfill_sgid_attr(). 443 */ 444static int rdma_fill_sgid_attr(struct ib_device *device, 445 struct rdma_ah_attr *ah_attr, 446 const struct ib_gid_attr **old_sgid_attr) 447{ 448 const struct ib_gid_attr *sgid_attr; 449 struct ib_global_route *grh; 450 int ret; 451 452 *old_sgid_attr = ah_attr->grh.sgid_attr; 453 454 ret = rdma_check_ah_attr(device, ah_attr); 455 if (ret) 456 return ret; 457 458 if (!(ah_attr->ah_flags & IB_AH_GRH)) 459 return 0; 460 461 grh = rdma_ah_retrieve_grh(ah_attr); 462 if (grh->sgid_attr) 463 return 0; 464 465 sgid_attr = 466 rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index); 467 if (IS_ERR(sgid_attr)) 468 return PTR_ERR(sgid_attr); 469 470 /* Move ownerhip of the kref into the ah_attr */ 471 grh->sgid_attr = sgid_attr; 472 return 0; 473} 474 475static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr, 476 const struct ib_gid_attr *old_sgid_attr) 477{ 478 /* 479 * Fill didn't change anything, the caller retains ownership of 480 * whatever it passed 481 */ 482 if (ah_attr->grh.sgid_attr == old_sgid_attr) 483 return; 484 485 /* 486 * Otherwise, we need to undo what rdma_fill_sgid_attr so the caller 487 * doesn't see any change in the rdma_ah_attr. If we get here 488 * old_sgid_attr is NULL. 489 */ 490 rdma_destroy_ah_attr(ah_attr); 491} 492 493static const struct ib_gid_attr * 494rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr, 495 const struct ib_gid_attr *old_attr) 496{ 497 if (old_attr) 498 rdma_put_gid_attr(old_attr); 499 if (ah_attr->ah_flags & IB_AH_GRH) { 500 rdma_hold_gid_attr(ah_attr->grh.sgid_attr); 501 return ah_attr->grh.sgid_attr; 502 } 503 return NULL; 504} 505 506static struct ib_ah *_rdma_create_ah(struct ib_pd *pd, 507 struct rdma_ah_attr *ah_attr, 508 u32 flags, 509 struct ib_udata *udata, 510 struct net_device *xmit_slave) 511{ 512 struct rdma_ah_init_attr init_attr = {}; 513 struct ib_device *device = pd->device; 514 struct ib_ah *ah; 515 int ret; 516 517 might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE); 518 519 if (!udata && !device->ops.create_ah) 520 return ERR_PTR(-EOPNOTSUPP); 521 522 ah = rdma_zalloc_drv_obj_gfp( 523 device, ib_ah, 524 (flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC); 525 if (!ah) 526 return ERR_PTR(-ENOMEM); 527 528 ah->device = device; 529 ah->pd = pd; 530 ah->type = ah_attr->type; 531 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL); 532 init_attr.ah_attr = ah_attr; 533 init_attr.flags = flags; 534 init_attr.xmit_slave = xmit_slave; 535 536 if (udata) 537 ret = device->ops.create_user_ah(ah, &init_attr, udata); 538 else 539 ret = device->ops.create_ah(ah, &init_attr, NULL); 540 if (ret) { 541 if (ah->sgid_attr) 542 rdma_put_gid_attr(ah->sgid_attr); 543 kfree(ah); 544 return ERR_PTR(ret); 545 } 546 547 atomic_inc(&pd->usecnt); 548 return ah; 549} 550 551/** 552 * rdma_create_ah - Creates an address handle for the 553 * given address vector. 554 * @pd: The protection domain associated with the address handle. 555 * @ah_attr: The attributes of the address vector. 556 * @flags: Create address handle flags (see enum rdma_create_ah_flags). 557 * 558 * It returns 0 on success and returns appropriate error code on error. 559 * The address handle is used to reference a local or global destination 560 * in all UD QP post sends. 561 */ 562struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr, 563 u32 flags) 564{ 565 const struct ib_gid_attr *old_sgid_attr; 566 struct net_device *slave; 567 struct ib_ah *ah; 568 int ret; 569 570 ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr); 571 if (ret) 572 return ERR_PTR(ret); 573 slave = rdma_lag_get_ah_roce_slave(pd->device, ah_attr, 574 (flags & RDMA_CREATE_AH_SLEEPABLE) ? 575 GFP_KERNEL : GFP_ATOMIC); 576 if (IS_ERR(slave)) { 577 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 578 return ERR_CAST(slave); 579 } 580 ah = _rdma_create_ah(pd, ah_attr, flags, NULL, slave); 581 rdma_lag_put_ah_roce_slave(slave); 582 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 583 return ah; 584} 585EXPORT_SYMBOL(rdma_create_ah); 586 587/** 588 * rdma_create_user_ah - Creates an address handle for the 589 * given address vector. 590 * It resolves destination mac address for ah attribute of RoCE type. 591 * @pd: The protection domain associated with the address handle. 592 * @ah_attr: The attributes of the address vector. 593 * @udata: pointer to user's input output buffer information need by 594 * provider driver. 595 * 596 * It returns 0 on success and returns appropriate error code on error. 597 * The address handle is used to reference a local or global destination 598 * in all UD QP post sends. 599 */ 600struct ib_ah *rdma_create_user_ah(struct ib_pd *pd, 601 struct rdma_ah_attr *ah_attr, 602 struct ib_udata *udata) 603{ 604 const struct ib_gid_attr *old_sgid_attr; 605 struct ib_ah *ah; 606 int err; 607 608 err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr); 609 if (err) 610 return ERR_PTR(err); 611 612 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) { 613 err = ib_resolve_eth_dmac(pd->device, ah_attr); 614 if (err) { 615 ah = ERR_PTR(err); 616 goto out; 617 } 618 } 619 620 ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE, 621 udata, NULL); 622 623out: 624 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 625 return ah; 626} 627EXPORT_SYMBOL(rdma_create_user_ah); 628 629int ib_get_rdma_header_version(const union rdma_network_hdr *hdr) 630{ 631 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh; 632 struct iphdr ip4h_checked; 633 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh; 634 635 /* If it's IPv6, the version must be 6, otherwise, the first 636 * 20 bytes (before the IPv4 header) are garbled. 637 */ 638 if (ip6h->version != 6) 639 return (ip4h->version == 4) ? 4 : 0; 640 /* version may be 6 or 4 because the first 20 bytes could be garbled */ 641 642 /* RoCE v2 requires no options, thus header length 643 * must be 5 words 644 */ 645 if (ip4h->ihl != 5) 646 return 6; 647 648 /* Verify checksum. 649 * We can't write on scattered buffers so we need to copy to 650 * temp buffer. 651 */ 652 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked)); 653 ip4h_checked.check = 0; 654 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5); 655 /* if IPv4 header checksum is OK, believe it */ 656 if (ip4h->check == ip4h_checked.check) 657 return 4; 658 return 6; 659} 660EXPORT_SYMBOL(ib_get_rdma_header_version); 661 662static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device, 663 u32 port_num, 664 const struct ib_grh *grh) 665{ 666 int grh_version; 667 668 if (rdma_protocol_ib(device, port_num)) 669 return RDMA_NETWORK_IB; 670 671 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh); 672 673 if (grh_version == 4) 674 return RDMA_NETWORK_IPV4; 675 676 if (grh->next_hdr == IPPROTO_UDP) 677 return RDMA_NETWORK_IPV6; 678 679 return RDMA_NETWORK_ROCE_V1; 680} 681 682struct find_gid_index_context { 683 u16 vlan_id; 684 enum ib_gid_type gid_type; 685}; 686 687static bool find_gid_index(const union ib_gid *gid, 688 const struct ib_gid_attr *gid_attr, 689 void *context) 690{ 691 struct find_gid_index_context *ctx = context; 692 u16 vlan_id = 0xffff; 693 int ret; 694 695 if (ctx->gid_type != gid_attr->gid_type) 696 return false; 697 698 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL); 699 if (ret) 700 return false; 701 702 return ctx->vlan_id == vlan_id; 703} 704 705static const struct ib_gid_attr * 706get_sgid_attr_from_eth(struct ib_device *device, u32 port_num, 707 u16 vlan_id, const union ib_gid *sgid, 708 enum ib_gid_type gid_type) 709{ 710 struct find_gid_index_context context = {.vlan_id = vlan_id, 711 .gid_type = gid_type}; 712 713 return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index, 714 &context); 715} 716 717int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 718 enum rdma_network_type net_type, 719 union ib_gid *sgid, union ib_gid *dgid) 720{ 721 struct sockaddr_in src_in; 722 struct sockaddr_in dst_in; 723 __be32 src_saddr, dst_saddr; 724 725 if (!sgid || !dgid) 726 return -EINVAL; 727 728 if (net_type == RDMA_NETWORK_IPV4) { 729 memcpy(&src_in.sin_addr.s_addr, 730 &hdr->roce4grh.saddr, 4); 731 memcpy(&dst_in.sin_addr.s_addr, 732 &hdr->roce4grh.daddr, 4); 733 src_saddr = src_in.sin_addr.s_addr; 734 dst_saddr = dst_in.sin_addr.s_addr; 735 ipv6_addr_set_v4mapped(src_saddr, 736 (struct in6_addr *)sgid); 737 ipv6_addr_set_v4mapped(dst_saddr, 738 (struct in6_addr *)dgid); 739 return 0; 740 } else if (net_type == RDMA_NETWORK_IPV6 || 741 net_type == RDMA_NETWORK_IB || net_type == RDMA_NETWORK_ROCE_V1) { 742 *dgid = hdr->ibgrh.dgid; 743 *sgid = hdr->ibgrh.sgid; 744 return 0; 745 } else { 746 return -EINVAL; 747 } 748} 749EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr); 750 751/* Resolve destination mac address and hop limit for unicast destination 752 * GID entry, considering the source GID entry as well. 753 * ah_attribute must have valid port_num, sgid_index. 754 */ 755static int ib_resolve_unicast_gid_dmac(struct ib_device *device, 756 struct rdma_ah_attr *ah_attr) 757{ 758 struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr); 759 const struct ib_gid_attr *sgid_attr = grh->sgid_attr; 760 int hop_limit = 0xff; 761 int ret = 0; 762 763 /* If destination is link local and source GID is RoCEv1, 764 * IP stack is not used. 765 */ 766 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) && 767 sgid_attr->gid_type == IB_GID_TYPE_ROCE) { 768 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw, 769 ah_attr->roce.dmac); 770 return ret; 771 } 772 773 ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid, 774 ah_attr->roce.dmac, 775 sgid_attr, &hop_limit); 776 777 grh->hop_limit = hop_limit; 778 return ret; 779} 780 781/* 782 * This function initializes address handle attributes from the incoming packet. 783 * Incoming packet has dgid of the receiver node on which this code is 784 * getting executed and, sgid contains the GID of the sender. 785 * 786 * When resolving mac address of destination, the arrived dgid is used 787 * as sgid and, sgid is used as dgid because sgid contains destinations 788 * GID whom to respond to. 789 * 790 * On success the caller is responsible to call rdma_destroy_ah_attr on the 791 * attr. 792 */ 793int ib_init_ah_attr_from_wc(struct ib_device *device, u32 port_num, 794 const struct ib_wc *wc, const struct ib_grh *grh, 795 struct rdma_ah_attr *ah_attr) 796{ 797 u32 flow_class; 798 int ret; 799 enum rdma_network_type net_type = RDMA_NETWORK_IB; 800 enum ib_gid_type gid_type = IB_GID_TYPE_IB; 801 const struct ib_gid_attr *sgid_attr; 802 int hoplimit = 0xff; 803 union ib_gid dgid; 804 union ib_gid sgid; 805 806 might_sleep(); 807 808 memset(ah_attr, 0, sizeof *ah_attr); 809 ah_attr->type = rdma_ah_find_type(device, port_num); 810 if (rdma_cap_eth_ah(device, port_num)) { 811 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE) 812 net_type = wc->network_hdr_type; 813 else 814 net_type = ib_get_net_type_by_grh(device, port_num, grh); 815 gid_type = ib_network_to_gid_type(net_type); 816 } 817 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type, 818 &sgid, &dgid); 819 if (ret) 820 return ret; 821 822 rdma_ah_set_sl(ah_attr, wc->sl); 823 rdma_ah_set_port_num(ah_attr, port_num); 824 825 if (rdma_protocol_roce(device, port_num)) { 826 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ? 827 wc->vlan_id : 0xffff; 828 829 if (!(wc->wc_flags & IB_WC_GRH)) 830 return -EPROTOTYPE; 831 832 sgid_attr = get_sgid_attr_from_eth(device, port_num, 833 vlan_id, &dgid, 834 gid_type); 835 if (IS_ERR(sgid_attr)) 836 return PTR_ERR(sgid_attr); 837 838 flow_class = be32_to_cpu(grh->version_tclass_flow); 839 rdma_move_grh_sgid_attr(ah_attr, 840 &sgid, 841 flow_class & 0xFFFFF, 842 hoplimit, 843 (flow_class >> 20) & 0xFF, 844 sgid_attr); 845 846 ret = ib_resolve_unicast_gid_dmac(device, ah_attr); 847 if (ret) 848 rdma_destroy_ah_attr(ah_attr); 849 850 return ret; 851 } else { 852 rdma_ah_set_dlid(ah_attr, wc->slid); 853 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits); 854 855 if ((wc->wc_flags & IB_WC_GRH) == 0) 856 return 0; 857 858 if (dgid.global.interface_id != 859 cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) { 860 sgid_attr = rdma_find_gid_by_port( 861 device, &dgid, IB_GID_TYPE_IB, port_num, NULL); 862 } else 863 sgid_attr = rdma_get_gid_attr(device, port_num, 0); 864 865 if (IS_ERR(sgid_attr)) 866 return PTR_ERR(sgid_attr); 867 flow_class = be32_to_cpu(grh->version_tclass_flow); 868 rdma_move_grh_sgid_attr(ah_attr, 869 &sgid, 870 flow_class & 0xFFFFF, 871 hoplimit, 872 (flow_class >> 20) & 0xFF, 873 sgid_attr); 874 875 return 0; 876 } 877} 878EXPORT_SYMBOL(ib_init_ah_attr_from_wc); 879 880/** 881 * rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership 882 * of the reference 883 * 884 * @attr: Pointer to AH attribute structure 885 * @dgid: Destination GID 886 * @flow_label: Flow label 887 * @hop_limit: Hop limit 888 * @traffic_class: traffic class 889 * @sgid_attr: Pointer to SGID attribute 890 * 891 * This takes ownership of the sgid_attr reference. The caller must ensure 892 * rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after 893 * calling this function. 894 */ 895void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid, 896 u32 flow_label, u8 hop_limit, u8 traffic_class, 897 const struct ib_gid_attr *sgid_attr) 898{ 899 rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit, 900 traffic_class); 901 attr->grh.sgid_attr = sgid_attr; 902} 903EXPORT_SYMBOL(rdma_move_grh_sgid_attr); 904 905/** 906 * rdma_destroy_ah_attr - Release reference to SGID attribute of 907 * ah attribute. 908 * @ah_attr: Pointer to ah attribute 909 * 910 * Release reference to the SGID attribute of the ah attribute if it is 911 * non NULL. It is safe to call this multiple times, and safe to call it on 912 * a zero initialized ah_attr. 913 */ 914void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr) 915{ 916 if (ah_attr->grh.sgid_attr) { 917 rdma_put_gid_attr(ah_attr->grh.sgid_attr); 918 ah_attr->grh.sgid_attr = NULL; 919 } 920} 921EXPORT_SYMBOL(rdma_destroy_ah_attr); 922 923struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 924 const struct ib_grh *grh, u32 port_num) 925{ 926 struct rdma_ah_attr ah_attr; 927 struct ib_ah *ah; 928 int ret; 929 930 ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr); 931 if (ret) 932 return ERR_PTR(ret); 933 934 ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE); 935 936 rdma_destroy_ah_attr(&ah_attr); 937 return ah; 938} 939EXPORT_SYMBOL(ib_create_ah_from_wc); 940 941int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 942{ 943 const struct ib_gid_attr *old_sgid_attr; 944 int ret; 945 946 if (ah->type != ah_attr->type) 947 return -EINVAL; 948 949 ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr); 950 if (ret) 951 return ret; 952 953 ret = ah->device->ops.modify_ah ? 954 ah->device->ops.modify_ah(ah, ah_attr) : 955 -EOPNOTSUPP; 956 957 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr); 958 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr); 959 return ret; 960} 961EXPORT_SYMBOL(rdma_modify_ah); 962 963int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 964{ 965 ah_attr->grh.sgid_attr = NULL; 966 967 return ah->device->ops.query_ah ? 968 ah->device->ops.query_ah(ah, ah_attr) : 969 -EOPNOTSUPP; 970} 971EXPORT_SYMBOL(rdma_query_ah); 972 973int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata) 974{ 975 const struct ib_gid_attr *sgid_attr = ah->sgid_attr; 976 struct ib_pd *pd; 977 int ret; 978 979 might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE); 980 981 pd = ah->pd; 982 983 ret = ah->device->ops.destroy_ah(ah, flags); 984 if (ret) 985 return ret; 986 987 atomic_dec(&pd->usecnt); 988 if (sgid_attr) 989 rdma_put_gid_attr(sgid_attr); 990 991 kfree(ah); 992 return ret; 993} 994EXPORT_SYMBOL(rdma_destroy_ah_user); 995 996/* Shared receive queues */ 997 998/** 999 * ib_create_srq_user - Creates a SRQ associated with the specified protection 1000 * domain. 1001 * @pd: The protection domain associated with the SRQ. 1002 * @srq_init_attr: A list of initial attributes required to create the 1003 * SRQ. If SRQ creation succeeds, then the attributes are updated to 1004 * the actual capabilities of the created SRQ. 1005 * @uobject: uobject pointer if this is not a kernel SRQ 1006 * @udata: udata pointer if this is not a kernel SRQ 1007 * 1008 * srq_attr->max_wr and srq_attr->max_sge are read the determine the 1009 * requested size of the SRQ, and set to the actual values allocated 1010 * on return. If ib_create_srq() succeeds, then max_wr and max_sge 1011 * will always be at least as large as the requested values. 1012 */ 1013struct ib_srq *ib_create_srq_user(struct ib_pd *pd, 1014 struct ib_srq_init_attr *srq_init_attr, 1015 struct ib_usrq_object *uobject, 1016 struct ib_udata *udata) 1017{ 1018 struct ib_srq *srq; 1019 int ret; 1020 1021 srq = rdma_zalloc_drv_obj(pd->device, ib_srq); 1022 if (!srq) 1023 return ERR_PTR(-ENOMEM); 1024 1025 srq->device = pd->device; 1026 srq->pd = pd; 1027 srq->event_handler = srq_init_attr->event_handler; 1028 srq->srq_context = srq_init_attr->srq_context; 1029 srq->srq_type = srq_init_attr->srq_type; 1030 srq->uobject = uobject; 1031 1032 if (ib_srq_has_cq(srq->srq_type)) { 1033 srq->ext.cq = srq_init_attr->ext.cq; 1034 atomic_inc(&srq->ext.cq->usecnt); 1035 } 1036 if (srq->srq_type == IB_SRQT_XRC) { 1037 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd; 1038 if (srq->ext.xrc.xrcd) 1039 atomic_inc(&srq->ext.xrc.xrcd->usecnt); 1040 } 1041 atomic_inc(&pd->usecnt); 1042 1043 rdma_restrack_new(&srq->res, RDMA_RESTRACK_SRQ); 1044 rdma_restrack_parent_name(&srq->res, &pd->res); 1045 1046 ret = pd->device->ops.create_srq(srq, srq_init_attr, udata); 1047 if (ret) { 1048 rdma_restrack_put(&srq->res); 1049 atomic_dec(&pd->usecnt); 1050 if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd) 1051 atomic_dec(&srq->ext.xrc.xrcd->usecnt); 1052 if (ib_srq_has_cq(srq->srq_type)) 1053 atomic_dec(&srq->ext.cq->usecnt); 1054 kfree(srq); 1055 return ERR_PTR(ret); 1056 } 1057 1058 rdma_restrack_add(&srq->res); 1059 1060 return srq; 1061} 1062EXPORT_SYMBOL(ib_create_srq_user); 1063 1064int ib_modify_srq(struct ib_srq *srq, 1065 struct ib_srq_attr *srq_attr, 1066 enum ib_srq_attr_mask srq_attr_mask) 1067{ 1068 return srq->device->ops.modify_srq ? 1069 srq->device->ops.modify_srq(srq, srq_attr, srq_attr_mask, 1070 NULL) : -EOPNOTSUPP; 1071} 1072EXPORT_SYMBOL(ib_modify_srq); 1073 1074int ib_query_srq(struct ib_srq *srq, 1075 struct ib_srq_attr *srq_attr) 1076{ 1077 return srq->device->ops.query_srq ? 1078 srq->device->ops.query_srq(srq, srq_attr) : -EOPNOTSUPP; 1079} 1080EXPORT_SYMBOL(ib_query_srq); 1081 1082int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata) 1083{ 1084 int ret; 1085 1086 if (atomic_read(&srq->usecnt)) 1087 return -EBUSY; 1088 1089 ret = srq->device->ops.destroy_srq(srq, udata); 1090 if (ret) 1091 return ret; 1092 1093 atomic_dec(&srq->pd->usecnt); 1094 if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd) 1095 atomic_dec(&srq->ext.xrc.xrcd->usecnt); 1096 if (ib_srq_has_cq(srq->srq_type)) 1097 atomic_dec(&srq->ext.cq->usecnt); 1098 rdma_restrack_del(&srq->res); 1099 kfree(srq); 1100 1101 return ret; 1102} 1103EXPORT_SYMBOL(ib_destroy_srq_user); 1104 1105/* Queue pairs */ 1106 1107static void __ib_qp_event_handler(struct ib_event *event, void *context) 1108{ 1109 struct ib_qp *qp = event->element.qp; 1110 1111 if (event->event == IB_EVENT_QP_LAST_WQE_REACHED) 1112 complete(&qp->srq_completion); 1113 if (qp->registered_event_handler) 1114 qp->registered_event_handler(event, qp->qp_context); 1115} 1116 1117static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) 1118{ 1119 struct ib_qp *qp = context; 1120 unsigned long flags; 1121 1122 spin_lock_irqsave(&qp->device->qp_open_list_lock, flags); 1123 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 1124 if (event->element.qp->event_handler) 1125 event->element.qp->event_handler(event, event->element.qp->qp_context); 1126 spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags); 1127} 1128 1129static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 1130 void (*event_handler)(struct ib_event *, void *), 1131 void *qp_context) 1132{ 1133 struct ib_qp *qp; 1134 unsigned long flags; 1135 int err; 1136 1137 qp = kzalloc(sizeof *qp, GFP_KERNEL); 1138 if (!qp) 1139 return ERR_PTR(-ENOMEM); 1140 1141 qp->real_qp = real_qp; 1142 err = ib_open_shared_qp_security(qp, real_qp->device); 1143 if (err) { 1144 kfree(qp); 1145 return ERR_PTR(err); 1146 } 1147 1148 qp->real_qp = real_qp; 1149 atomic_inc(&real_qp->usecnt); 1150 qp->device = real_qp->device; 1151 qp->event_handler = event_handler; 1152 qp->qp_context = qp_context; 1153 qp->qp_num = real_qp->qp_num; 1154 qp->qp_type = real_qp->qp_type; 1155 1156 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags); 1157 list_add(&qp->open_list, &real_qp->open_list); 1158 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags); 1159 1160 return qp; 1161} 1162 1163struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 1164 struct ib_qp_open_attr *qp_open_attr) 1165{ 1166 struct ib_qp *qp, *real_qp; 1167 1168 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 1169 return ERR_PTR(-EINVAL); 1170 1171 down_read(&xrcd->tgt_qps_rwsem); 1172 real_qp = xa_load(&xrcd->tgt_qps, qp_open_attr->qp_num); 1173 if (!real_qp) { 1174 up_read(&xrcd->tgt_qps_rwsem); 1175 return ERR_PTR(-EINVAL); 1176 } 1177 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 1178 qp_open_attr->qp_context); 1179 up_read(&xrcd->tgt_qps_rwsem); 1180 return qp; 1181} 1182EXPORT_SYMBOL(ib_open_qp); 1183 1184static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp, 1185 struct ib_qp_init_attr *qp_init_attr) 1186{ 1187 struct ib_qp *real_qp = qp; 1188 int err; 1189 1190 qp->event_handler = __ib_shared_qp_event_handler; 1191 qp->qp_context = qp; 1192 qp->pd = NULL; 1193 qp->send_cq = qp->recv_cq = NULL; 1194 qp->srq = NULL; 1195 qp->xrcd = qp_init_attr->xrcd; 1196 atomic_inc(&qp_init_attr->xrcd->usecnt); 1197 INIT_LIST_HEAD(&qp->open_list); 1198 1199 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 1200 qp_init_attr->qp_context); 1201 if (IS_ERR(qp)) 1202 return qp; 1203 1204 err = xa_err(xa_store(&qp_init_attr->xrcd->tgt_qps, real_qp->qp_num, 1205 real_qp, GFP_KERNEL)); 1206 if (err) { 1207 ib_close_qp(qp); 1208 return ERR_PTR(err); 1209 } 1210 return qp; 1211} 1212 1213static struct ib_qp *create_qp(struct ib_device *dev, struct ib_pd *pd, 1214 struct ib_qp_init_attr *attr, 1215 struct ib_udata *udata, 1216 struct ib_uqp_object *uobj, const char *caller) 1217{ 1218 struct ib_udata dummy = {}; 1219 struct ib_qp *qp; 1220 int ret; 1221 1222 if (!dev->ops.create_qp) 1223 return ERR_PTR(-EOPNOTSUPP); 1224 1225 qp = rdma_zalloc_drv_obj_numa(dev, ib_qp); 1226 if (!qp) 1227 return ERR_PTR(-ENOMEM); 1228 1229 qp->device = dev; 1230 qp->pd = pd; 1231 qp->uobject = uobj; 1232 qp->real_qp = qp; 1233 1234 qp->qp_type = attr->qp_type; 1235 qp->rwq_ind_tbl = attr->rwq_ind_tbl; 1236 qp->srq = attr->srq; 1237 qp->event_handler = __ib_qp_event_handler; 1238 qp->registered_event_handler = attr->event_handler; 1239 qp->port = attr->port_num; 1240 qp->qp_context = attr->qp_context; 1241 1242 spin_lock_init(&qp->mr_lock); 1243 INIT_LIST_HEAD(&qp->rdma_mrs); 1244 INIT_LIST_HEAD(&qp->sig_mrs); 1245 init_completion(&qp->srq_completion); 1246 1247 qp->send_cq = attr->send_cq; 1248 qp->recv_cq = attr->recv_cq; 1249 1250 rdma_restrack_new(&qp->res, RDMA_RESTRACK_QP); 1251 WARN_ONCE(!udata && !caller, "Missing kernel QP owner"); 1252 rdma_restrack_set_name(&qp->res, udata ? NULL : caller); 1253 ret = dev->ops.create_qp(qp, attr, udata); 1254 if (ret) 1255 goto err_create; 1256 1257 /* 1258 * TODO: The mlx4 internally overwrites send_cq and recv_cq. 1259 * Unfortunately, it is not an easy task to fix that driver. 1260 */ 1261 qp->send_cq = attr->send_cq; 1262 qp->recv_cq = attr->recv_cq; 1263 1264 ret = ib_create_qp_security(qp, dev); 1265 if (ret) 1266 goto err_security; 1267 1268 rdma_restrack_add(&qp->res); 1269 return qp; 1270 1271err_security: 1272 qp->device->ops.destroy_qp(qp, udata ? &dummy : NULL); 1273err_create: 1274 rdma_restrack_put(&qp->res); 1275 kfree(qp); 1276 return ERR_PTR(ret); 1277 1278} 1279 1280/** 1281 * ib_create_qp_user - Creates a QP associated with the specified protection 1282 * domain. 1283 * @dev: IB device 1284 * @pd: The protection domain associated with the QP. 1285 * @attr: A list of initial attributes required to create the 1286 * QP. If QP creation succeeds, then the attributes are updated to 1287 * the actual capabilities of the created QP. 1288 * @udata: User data 1289 * @uobj: uverbs obect 1290 * @caller: caller's build-time module name 1291 */ 1292struct ib_qp *ib_create_qp_user(struct ib_device *dev, struct ib_pd *pd, 1293 struct ib_qp_init_attr *attr, 1294 struct ib_udata *udata, 1295 struct ib_uqp_object *uobj, const char *caller) 1296{ 1297 struct ib_qp *qp, *xrc_qp; 1298 1299 if (attr->qp_type == IB_QPT_XRC_TGT) 1300 qp = create_qp(dev, pd, attr, NULL, NULL, caller); 1301 else 1302 qp = create_qp(dev, pd, attr, udata, uobj, NULL); 1303 if (attr->qp_type != IB_QPT_XRC_TGT || IS_ERR(qp)) 1304 return qp; 1305 1306 xrc_qp = create_xrc_qp_user(qp, attr); 1307 if (IS_ERR(xrc_qp)) { 1308 ib_destroy_qp(qp); 1309 return xrc_qp; 1310 } 1311 1312 xrc_qp->uobject = uobj; 1313 return xrc_qp; 1314} 1315EXPORT_SYMBOL(ib_create_qp_user); 1316 1317void ib_qp_usecnt_inc(struct ib_qp *qp) 1318{ 1319 if (qp->pd) 1320 atomic_inc(&qp->pd->usecnt); 1321 if (qp->send_cq) 1322 atomic_inc(&qp->send_cq->usecnt); 1323 if (qp->recv_cq) 1324 atomic_inc(&qp->recv_cq->usecnt); 1325 if (qp->srq) 1326 atomic_inc(&qp->srq->usecnt); 1327 if (qp->rwq_ind_tbl) 1328 atomic_inc(&qp->rwq_ind_tbl->usecnt); 1329} 1330EXPORT_SYMBOL(ib_qp_usecnt_inc); 1331 1332void ib_qp_usecnt_dec(struct ib_qp *qp) 1333{ 1334 if (qp->rwq_ind_tbl) 1335 atomic_dec(&qp->rwq_ind_tbl->usecnt); 1336 if (qp->srq) 1337 atomic_dec(&qp->srq->usecnt); 1338 if (qp->recv_cq) 1339 atomic_dec(&qp->recv_cq->usecnt); 1340 if (qp->send_cq) 1341 atomic_dec(&qp->send_cq->usecnt); 1342 if (qp->pd) 1343 atomic_dec(&qp->pd->usecnt); 1344} 1345EXPORT_SYMBOL(ib_qp_usecnt_dec); 1346 1347struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd, 1348 struct ib_qp_init_attr *qp_init_attr, 1349 const char *caller) 1350{ 1351 struct ib_device *device = pd->device; 1352 struct ib_qp *qp; 1353 int ret; 1354 1355 /* 1356 * If the callers is using the RDMA API calculate the resources 1357 * needed for the RDMA READ/WRITE operations. 1358 * 1359 * Note that these callers need to pass in a port number. 1360 */ 1361 if (qp_init_attr->cap.max_rdma_ctxs) 1362 rdma_rw_init_qp(device, qp_init_attr); 1363 1364 qp = create_qp(device, pd, qp_init_attr, NULL, NULL, caller); 1365 if (IS_ERR(qp)) 1366 return qp; 1367 1368 ib_qp_usecnt_inc(qp); 1369 1370 if (qp_init_attr->cap.max_rdma_ctxs) { 1371 ret = rdma_rw_init_mrs(qp, qp_init_attr); 1372 if (ret) 1373 goto err; 1374 } 1375 1376 /* 1377 * Note: all hw drivers guarantee that max_send_sge is lower than 1378 * the device RDMA WRITE SGE limit but not all hw drivers ensure that 1379 * max_send_sge <= max_sge_rd. 1380 */ 1381 qp->max_write_sge = qp_init_attr->cap.max_send_sge; 1382 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge, 1383 device->attrs.max_sge_rd); 1384 if (qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN) 1385 qp->integrity_en = true; 1386 1387 return qp; 1388 1389err: 1390 ib_destroy_qp(qp); 1391 return ERR_PTR(ret); 1392 1393} 1394EXPORT_SYMBOL(ib_create_qp_kernel); 1395 1396static const struct { 1397 int valid; 1398 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 1399 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 1400} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 1401 [IB_QPS_RESET] = { 1402 [IB_QPS_RESET] = { .valid = 1 }, 1403 [IB_QPS_INIT] = { 1404 .valid = 1, 1405 .req_param = { 1406 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1407 IB_QP_PORT | 1408 IB_QP_QKEY), 1409 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 1410 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 1411 IB_QP_PORT | 1412 IB_QP_ACCESS_FLAGS), 1413 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 1414 IB_QP_PORT | 1415 IB_QP_ACCESS_FLAGS), 1416 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 1417 IB_QP_PORT | 1418 IB_QP_ACCESS_FLAGS), 1419 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 1420 IB_QP_PORT | 1421 IB_QP_ACCESS_FLAGS), 1422 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1423 IB_QP_QKEY), 1424 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1425 IB_QP_QKEY), 1426 } 1427 }, 1428 }, 1429 [IB_QPS_INIT] = { 1430 [IB_QPS_RESET] = { .valid = 1 }, 1431 [IB_QPS_ERR] = { .valid = 1 }, 1432 [IB_QPS_INIT] = { 1433 .valid = 1, 1434 .opt_param = { 1435 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1436 IB_QP_PORT | 1437 IB_QP_QKEY), 1438 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 1439 IB_QP_PORT | 1440 IB_QP_ACCESS_FLAGS), 1441 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 1442 IB_QP_PORT | 1443 IB_QP_ACCESS_FLAGS), 1444 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 1445 IB_QP_PORT | 1446 IB_QP_ACCESS_FLAGS), 1447 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 1448 IB_QP_PORT | 1449 IB_QP_ACCESS_FLAGS), 1450 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1451 IB_QP_QKEY), 1452 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1453 IB_QP_QKEY), 1454 } 1455 }, 1456 [IB_QPS_RTR] = { 1457 .valid = 1, 1458 .req_param = { 1459 [IB_QPT_UC] = (IB_QP_AV | 1460 IB_QP_PATH_MTU | 1461 IB_QP_DEST_QPN | 1462 IB_QP_RQ_PSN), 1463 [IB_QPT_RC] = (IB_QP_AV | 1464 IB_QP_PATH_MTU | 1465 IB_QP_DEST_QPN | 1466 IB_QP_RQ_PSN | 1467 IB_QP_MAX_DEST_RD_ATOMIC | 1468 IB_QP_MIN_RNR_TIMER), 1469 [IB_QPT_XRC_INI] = (IB_QP_AV | 1470 IB_QP_PATH_MTU | 1471 IB_QP_DEST_QPN | 1472 IB_QP_RQ_PSN), 1473 [IB_QPT_XRC_TGT] = (IB_QP_AV | 1474 IB_QP_PATH_MTU | 1475 IB_QP_DEST_QPN | 1476 IB_QP_RQ_PSN | 1477 IB_QP_MAX_DEST_RD_ATOMIC | 1478 IB_QP_MIN_RNR_TIMER), 1479 }, 1480 .opt_param = { 1481 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1482 IB_QP_QKEY), 1483 [IB_QPT_UC] = (IB_QP_ALT_PATH | 1484 IB_QP_ACCESS_FLAGS | 1485 IB_QP_PKEY_INDEX), 1486 [IB_QPT_RC] = (IB_QP_ALT_PATH | 1487 IB_QP_ACCESS_FLAGS | 1488 IB_QP_PKEY_INDEX), 1489 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 1490 IB_QP_ACCESS_FLAGS | 1491 IB_QP_PKEY_INDEX), 1492 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 1493 IB_QP_ACCESS_FLAGS | 1494 IB_QP_PKEY_INDEX), 1495 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1496 IB_QP_QKEY), 1497 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1498 IB_QP_QKEY), 1499 }, 1500 }, 1501 }, 1502 [IB_QPS_RTR] = { 1503 [IB_QPS_RESET] = { .valid = 1 }, 1504 [IB_QPS_ERR] = { .valid = 1 }, 1505 [IB_QPS_RTS] = { 1506 .valid = 1, 1507 .req_param = { 1508 [IB_QPT_UD] = IB_QP_SQ_PSN, 1509 [IB_QPT_UC] = IB_QP_SQ_PSN, 1510 [IB_QPT_RC] = (IB_QP_TIMEOUT | 1511 IB_QP_RETRY_CNT | 1512 IB_QP_RNR_RETRY | 1513 IB_QP_SQ_PSN | 1514 IB_QP_MAX_QP_RD_ATOMIC), 1515 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 1516 IB_QP_RETRY_CNT | 1517 IB_QP_RNR_RETRY | 1518 IB_QP_SQ_PSN | 1519 IB_QP_MAX_QP_RD_ATOMIC), 1520 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 1521 IB_QP_SQ_PSN), 1522 [IB_QPT_SMI] = IB_QP_SQ_PSN, 1523 [IB_QPT_GSI] = IB_QP_SQ_PSN, 1524 }, 1525 .opt_param = { 1526 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1527 IB_QP_QKEY), 1528 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1529 IB_QP_ALT_PATH | 1530 IB_QP_ACCESS_FLAGS | 1531 IB_QP_PATH_MIG_STATE), 1532 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1533 IB_QP_ALT_PATH | 1534 IB_QP_ACCESS_FLAGS | 1535 IB_QP_MIN_RNR_TIMER | 1536 IB_QP_PATH_MIG_STATE), 1537 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1538 IB_QP_ALT_PATH | 1539 IB_QP_ACCESS_FLAGS | 1540 IB_QP_PATH_MIG_STATE), 1541 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1542 IB_QP_ALT_PATH | 1543 IB_QP_ACCESS_FLAGS | 1544 IB_QP_MIN_RNR_TIMER | 1545 IB_QP_PATH_MIG_STATE), 1546 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1547 IB_QP_QKEY), 1548 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1549 IB_QP_QKEY), 1550 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1551 } 1552 } 1553 }, 1554 [IB_QPS_RTS] = { 1555 [IB_QPS_RESET] = { .valid = 1 }, 1556 [IB_QPS_ERR] = { .valid = 1 }, 1557 [IB_QPS_RTS] = { 1558 .valid = 1, 1559 .opt_param = { 1560 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1561 IB_QP_QKEY), 1562 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1563 IB_QP_ACCESS_FLAGS | 1564 IB_QP_ALT_PATH | 1565 IB_QP_PATH_MIG_STATE), 1566 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1567 IB_QP_ACCESS_FLAGS | 1568 IB_QP_ALT_PATH | 1569 IB_QP_PATH_MIG_STATE | 1570 IB_QP_MIN_RNR_TIMER), 1571 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1572 IB_QP_ACCESS_FLAGS | 1573 IB_QP_ALT_PATH | 1574 IB_QP_PATH_MIG_STATE), 1575 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1576 IB_QP_ACCESS_FLAGS | 1577 IB_QP_ALT_PATH | 1578 IB_QP_PATH_MIG_STATE | 1579 IB_QP_MIN_RNR_TIMER), 1580 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1581 IB_QP_QKEY), 1582 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1583 IB_QP_QKEY), 1584 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1585 } 1586 }, 1587 [IB_QPS_SQD] = { 1588 .valid = 1, 1589 .opt_param = { 1590 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1591 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1592 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1593 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1594 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 1595 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1596 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 1597 } 1598 }, 1599 }, 1600 [IB_QPS_SQD] = { 1601 [IB_QPS_RESET] = { .valid = 1 }, 1602 [IB_QPS_ERR] = { .valid = 1 }, 1603 [IB_QPS_RTS] = { 1604 .valid = 1, 1605 .opt_param = { 1606 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1607 IB_QP_QKEY), 1608 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1609 IB_QP_ALT_PATH | 1610 IB_QP_ACCESS_FLAGS | 1611 IB_QP_PATH_MIG_STATE), 1612 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1613 IB_QP_ALT_PATH | 1614 IB_QP_ACCESS_FLAGS | 1615 IB_QP_MIN_RNR_TIMER | 1616 IB_QP_PATH_MIG_STATE), 1617 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1618 IB_QP_ALT_PATH | 1619 IB_QP_ACCESS_FLAGS | 1620 IB_QP_PATH_MIG_STATE), 1621 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1622 IB_QP_ALT_PATH | 1623 IB_QP_ACCESS_FLAGS | 1624 IB_QP_MIN_RNR_TIMER | 1625 IB_QP_PATH_MIG_STATE), 1626 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1627 IB_QP_QKEY), 1628 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1629 IB_QP_QKEY), 1630 } 1631 }, 1632 [IB_QPS_SQD] = { 1633 .valid = 1, 1634 .opt_param = { 1635 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1636 IB_QP_QKEY), 1637 [IB_QPT_UC] = (IB_QP_AV | 1638 IB_QP_ALT_PATH | 1639 IB_QP_ACCESS_FLAGS | 1640 IB_QP_PKEY_INDEX | 1641 IB_QP_PATH_MIG_STATE), 1642 [IB_QPT_RC] = (IB_QP_PORT | 1643 IB_QP_AV | 1644 IB_QP_TIMEOUT | 1645 IB_QP_RETRY_CNT | 1646 IB_QP_RNR_RETRY | 1647 IB_QP_MAX_QP_RD_ATOMIC | 1648 IB_QP_MAX_DEST_RD_ATOMIC | 1649 IB_QP_ALT_PATH | 1650 IB_QP_ACCESS_FLAGS | 1651 IB_QP_PKEY_INDEX | 1652 IB_QP_MIN_RNR_TIMER | 1653 IB_QP_PATH_MIG_STATE), 1654 [IB_QPT_XRC_INI] = (IB_QP_PORT | 1655 IB_QP_AV | 1656 IB_QP_TIMEOUT | 1657 IB_QP_RETRY_CNT | 1658 IB_QP_RNR_RETRY | 1659 IB_QP_MAX_QP_RD_ATOMIC | 1660 IB_QP_ALT_PATH | 1661 IB_QP_ACCESS_FLAGS | 1662 IB_QP_PKEY_INDEX | 1663 IB_QP_PATH_MIG_STATE), 1664 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 1665 IB_QP_AV | 1666 IB_QP_TIMEOUT | 1667 IB_QP_MAX_DEST_RD_ATOMIC | 1668 IB_QP_ALT_PATH | 1669 IB_QP_ACCESS_FLAGS | 1670 IB_QP_PKEY_INDEX | 1671 IB_QP_MIN_RNR_TIMER | 1672 IB_QP_PATH_MIG_STATE), 1673 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1674 IB_QP_QKEY), 1675 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1676 IB_QP_QKEY), 1677 } 1678 } 1679 }, 1680 [IB_QPS_SQE] = { 1681 [IB_QPS_RESET] = { .valid = 1 }, 1682 [IB_QPS_ERR] = { .valid = 1 }, 1683 [IB_QPS_RTS] = { 1684 .valid = 1, 1685 .opt_param = { 1686 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1687 IB_QP_QKEY), 1688 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1689 IB_QP_ACCESS_FLAGS), 1690 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1691 IB_QP_QKEY), 1692 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1693 IB_QP_QKEY), 1694 } 1695 } 1696 }, 1697 [IB_QPS_ERR] = { 1698 [IB_QPS_RESET] = { .valid = 1 }, 1699 [IB_QPS_ERR] = { .valid = 1 } 1700 } 1701}; 1702 1703bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 1704 enum ib_qp_type type, enum ib_qp_attr_mask mask) 1705{ 1706 enum ib_qp_attr_mask req_param, opt_param; 1707 1708 if (mask & IB_QP_CUR_STATE && 1709 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 1710 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 1711 return false; 1712 1713 if (!qp_state_table[cur_state][next_state].valid) 1714 return false; 1715 1716 req_param = qp_state_table[cur_state][next_state].req_param[type]; 1717 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 1718 1719 if ((mask & req_param) != req_param) 1720 return false; 1721 1722 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 1723 return false; 1724 1725 return true; 1726} 1727EXPORT_SYMBOL(ib_modify_qp_is_ok); 1728 1729/** 1730 * ib_resolve_eth_dmac - Resolve destination mac address 1731 * @device: Device to consider 1732 * @ah_attr: address handle attribute which describes the 1733 * source and destination parameters 1734 * ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It 1735 * returns 0 on success or appropriate error code. It initializes the 1736 * necessary ah_attr fields when call is successful. 1737 */ 1738static int ib_resolve_eth_dmac(struct ib_device *device, 1739 struct rdma_ah_attr *ah_attr) 1740{ 1741 int ret = 0; 1742 1743 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1744 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1745 __be32 addr = 0; 1746 1747 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4); 1748 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac); 1749 } else { 1750 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw, 1751 (char *)ah_attr->roce.dmac); 1752 } 1753 } else { 1754 ret = ib_resolve_unicast_gid_dmac(device, ah_attr); 1755 } 1756 return ret; 1757} 1758 1759static bool is_qp_type_connected(const struct ib_qp *qp) 1760{ 1761 return (qp->qp_type == IB_QPT_UC || 1762 qp->qp_type == IB_QPT_RC || 1763 qp->qp_type == IB_QPT_XRC_INI || 1764 qp->qp_type == IB_QPT_XRC_TGT); 1765} 1766 1767/* 1768 * IB core internal function to perform QP attributes modification. 1769 */ 1770static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, 1771 int attr_mask, struct ib_udata *udata) 1772{ 1773 u32 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1774 const struct ib_gid_attr *old_sgid_attr_av; 1775 const struct ib_gid_attr *old_sgid_attr_alt_av; 1776 int ret; 1777 1778 attr->xmit_slave = NULL; 1779 if (attr_mask & IB_QP_AV) { 1780 ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr, 1781 &old_sgid_attr_av); 1782 if (ret) 1783 return ret; 1784 1785 if (attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE && 1786 is_qp_type_connected(qp)) { 1787 struct net_device *slave; 1788 1789 /* 1790 * If the user provided the qp_attr then we have to 1791 * resolve it. Kerne users have to provide already 1792 * resolved rdma_ah_attr's. 1793 */ 1794 if (udata) { 1795 ret = ib_resolve_eth_dmac(qp->device, 1796 &attr->ah_attr); 1797 if (ret) 1798 goto out_av; 1799 } 1800 slave = rdma_lag_get_ah_roce_slave(qp->device, 1801 &attr->ah_attr, 1802 GFP_KERNEL); 1803 if (IS_ERR(slave)) { 1804 ret = PTR_ERR(slave); 1805 goto out_av; 1806 } 1807 attr->xmit_slave = slave; 1808 } 1809 } 1810 if (attr_mask & IB_QP_ALT_PATH) { 1811 /* 1812 * FIXME: This does not track the migration state, so if the 1813 * user loads a new alternate path after the HW has migrated 1814 * from primary->alternate we will keep the wrong 1815 * references. This is OK for IB because the reference 1816 * counting does not serve any functional purpose. 1817 */ 1818 ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr, 1819 &old_sgid_attr_alt_av); 1820 if (ret) 1821 goto out_av; 1822 1823 /* 1824 * Today the core code can only handle alternate paths and APM 1825 * for IB. Ban them in roce mode. 1826 */ 1827 if (!(rdma_protocol_ib(qp->device, 1828 attr->alt_ah_attr.port_num) && 1829 rdma_protocol_ib(qp->device, port))) { 1830 ret = -EINVAL; 1831 goto out; 1832 } 1833 } 1834 1835 if (rdma_ib_or_roce(qp->device, port)) { 1836 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) { 1837 dev_warn(&qp->device->dev, 1838 "%s rq_psn overflow, masking to 24 bits\n", 1839 __func__); 1840 attr->rq_psn &= 0xffffff; 1841 } 1842 1843 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) { 1844 dev_warn(&qp->device->dev, 1845 " %s sq_psn overflow, masking to 24 bits\n", 1846 __func__); 1847 attr->sq_psn &= 0xffffff; 1848 } 1849 } 1850 1851 /* 1852 * Bind this qp to a counter automatically based on the rdma counter 1853 * rules. This only set in RST2INIT with port specified 1854 */ 1855 if (!qp->counter && (attr_mask & IB_QP_PORT) && 1856 ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT)) 1857 rdma_counter_bind_qp_auto(qp, attr->port_num); 1858 1859 ret = ib_security_modify_qp(qp, attr, attr_mask, udata); 1860 if (ret) 1861 goto out; 1862 1863 if (attr_mask & IB_QP_PORT) 1864 qp->port = attr->port_num; 1865 if (attr_mask & IB_QP_AV) 1866 qp->av_sgid_attr = 1867 rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr); 1868 if (attr_mask & IB_QP_ALT_PATH) 1869 qp->alt_path_sgid_attr = rdma_update_sgid_attr( 1870 &attr->alt_ah_attr, qp->alt_path_sgid_attr); 1871 1872out: 1873 if (attr_mask & IB_QP_ALT_PATH) 1874 rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av); 1875out_av: 1876 if (attr_mask & IB_QP_AV) { 1877 rdma_lag_put_ah_roce_slave(attr->xmit_slave); 1878 rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av); 1879 } 1880 return ret; 1881} 1882 1883/** 1884 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 1885 * @ib_qp: The QP to modify. 1886 * @attr: On input, specifies the QP attributes to modify. On output, 1887 * the current values of selected QP attributes are returned. 1888 * @attr_mask: A bit-mask used to specify which attributes of the QP 1889 * are being modified. 1890 * @udata: pointer to user's input output buffer information 1891 * are being modified. 1892 * It returns 0 on success and returns appropriate error code on error. 1893 */ 1894int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr, 1895 int attr_mask, struct ib_udata *udata) 1896{ 1897 return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata); 1898} 1899EXPORT_SYMBOL(ib_modify_qp_with_udata); 1900 1901static void ib_get_width_and_speed(u32 netdev_speed, u32 lanes, 1902 u16 *speed, u8 *width) 1903{ 1904 if (!lanes) { 1905 if (netdev_speed <= SPEED_1000) { 1906 *width = IB_WIDTH_1X; 1907 *speed = IB_SPEED_SDR; 1908 } else if (netdev_speed <= SPEED_10000) { 1909 *width = IB_WIDTH_1X; 1910 *speed = IB_SPEED_FDR10; 1911 } else if (netdev_speed <= SPEED_20000) { 1912 *width = IB_WIDTH_4X; 1913 *speed = IB_SPEED_DDR; 1914 } else if (netdev_speed <= SPEED_25000) { 1915 *width = IB_WIDTH_1X; 1916 *speed = IB_SPEED_EDR; 1917 } else if (netdev_speed <= SPEED_40000) { 1918 *width = IB_WIDTH_4X; 1919 *speed = IB_SPEED_FDR10; 1920 } else if (netdev_speed <= SPEED_50000) { 1921 *width = IB_WIDTH_2X; 1922 *speed = IB_SPEED_EDR; 1923 } else if (netdev_speed <= SPEED_100000) { 1924 *width = IB_WIDTH_4X; 1925 *speed = IB_SPEED_EDR; 1926 } else if (netdev_speed <= SPEED_200000) { 1927 *width = IB_WIDTH_4X; 1928 *speed = IB_SPEED_HDR; 1929 } else { 1930 *width = IB_WIDTH_4X; 1931 *speed = IB_SPEED_NDR; 1932 } 1933 1934 return; 1935 } 1936 1937 switch (lanes) { 1938 case 1: 1939 *width = IB_WIDTH_1X; 1940 break; 1941 case 2: 1942 *width = IB_WIDTH_2X; 1943 break; 1944 case 4: 1945 *width = IB_WIDTH_4X; 1946 break; 1947 case 8: 1948 *width = IB_WIDTH_8X; 1949 break; 1950 case 12: 1951 *width = IB_WIDTH_12X; 1952 break; 1953 default: 1954 *width = IB_WIDTH_1X; 1955 } 1956 1957 switch (netdev_speed / lanes) { 1958 case SPEED_2500: 1959 *speed = IB_SPEED_SDR; 1960 break; 1961 case SPEED_5000: 1962 *speed = IB_SPEED_DDR; 1963 break; 1964 case SPEED_10000: 1965 *speed = IB_SPEED_FDR10; 1966 break; 1967 case SPEED_14000: 1968 *speed = IB_SPEED_FDR; 1969 break; 1970 case SPEED_25000: 1971 *speed = IB_SPEED_EDR; 1972 break; 1973 case SPEED_50000: 1974 *speed = IB_SPEED_HDR; 1975 break; 1976 case SPEED_100000: 1977 *speed = IB_SPEED_NDR; 1978 break; 1979 default: 1980 *speed = IB_SPEED_SDR; 1981 } 1982} 1983 1984int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed, u8 *width) 1985{ 1986 int rc; 1987 u32 netdev_speed; 1988 struct net_device *netdev; 1989 struct ethtool_link_ksettings lksettings = {}; 1990 1991 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET) 1992 return -EINVAL; 1993 1994 netdev = ib_device_get_netdev(dev, port_num); 1995 if (!netdev) 1996 return -ENODEV; 1997 1998 rtnl_lock(); 1999 rc = __ethtool_get_link_ksettings(netdev, &lksettings); 2000 rtnl_unlock(); 2001 2002 dev_put(netdev); 2003 2004 if (!rc && lksettings.base.speed != (u32)SPEED_UNKNOWN) { 2005 netdev_speed = lksettings.base.speed; 2006 } else { 2007 netdev_speed = SPEED_1000; 2008 if (rc) 2009 pr_warn("%s speed is unknown, defaulting to %u\n", 2010 netdev->name, netdev_speed); 2011 } 2012 2013 ib_get_width_and_speed(netdev_speed, lksettings.lanes, 2014 speed, width); 2015 2016 return 0; 2017} 2018EXPORT_SYMBOL(ib_get_eth_speed); 2019 2020int ib_modify_qp(struct ib_qp *qp, 2021 struct ib_qp_attr *qp_attr, 2022 int qp_attr_mask) 2023{ 2024 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL); 2025} 2026EXPORT_SYMBOL(ib_modify_qp); 2027 2028int ib_query_qp(struct ib_qp *qp, 2029 struct ib_qp_attr *qp_attr, 2030 int qp_attr_mask, 2031 struct ib_qp_init_attr *qp_init_attr) 2032{ 2033 qp_attr->ah_attr.grh.sgid_attr = NULL; 2034 qp_attr->alt_ah_attr.grh.sgid_attr = NULL; 2035 2036 return qp->device->ops.query_qp ? 2037 qp->device->ops.query_qp(qp->real_qp, qp_attr, qp_attr_mask, 2038 qp_init_attr) : -EOPNOTSUPP; 2039} 2040EXPORT_SYMBOL(ib_query_qp); 2041 2042int ib_close_qp(struct ib_qp *qp) 2043{ 2044 struct ib_qp *real_qp; 2045 unsigned long flags; 2046 2047 real_qp = qp->real_qp; 2048 if (real_qp == qp) 2049 return -EINVAL; 2050 2051 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags); 2052 list_del(&qp->open_list); 2053 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags); 2054 2055 atomic_dec(&real_qp->usecnt); 2056 if (qp->qp_sec) 2057 ib_close_shared_qp_security(qp->qp_sec); 2058 kfree(qp); 2059 2060 return 0; 2061} 2062EXPORT_SYMBOL(ib_close_qp); 2063 2064static int __ib_destroy_shared_qp(struct ib_qp *qp) 2065{ 2066 struct ib_xrcd *xrcd; 2067 struct ib_qp *real_qp; 2068 int ret; 2069 2070 real_qp = qp->real_qp; 2071 xrcd = real_qp->xrcd; 2072 down_write(&xrcd->tgt_qps_rwsem); 2073 ib_close_qp(qp); 2074 if (atomic_read(&real_qp->usecnt) == 0) 2075 xa_erase(&xrcd->tgt_qps, real_qp->qp_num); 2076 else 2077 real_qp = NULL; 2078 up_write(&xrcd->tgt_qps_rwsem); 2079 2080 if (real_qp) { 2081 ret = ib_destroy_qp(real_qp); 2082 if (!ret) 2083 atomic_dec(&xrcd->usecnt); 2084 } 2085 2086 return 0; 2087} 2088 2089int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata) 2090{ 2091 const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr; 2092 const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr; 2093 struct ib_qp_security *sec; 2094 int ret; 2095 2096 WARN_ON_ONCE(qp->mrs_used > 0); 2097 2098 if (atomic_read(&qp->usecnt)) 2099 return -EBUSY; 2100 2101 if (qp->real_qp != qp) 2102 return __ib_destroy_shared_qp(qp); 2103 2104 sec = qp->qp_sec; 2105 if (sec) 2106 ib_destroy_qp_security_begin(sec); 2107 2108 if (!qp->uobject) 2109 rdma_rw_cleanup_mrs(qp); 2110 2111 rdma_counter_unbind_qp(qp, qp->port, true); 2112 ret = qp->device->ops.destroy_qp(qp, udata); 2113 if (ret) { 2114 if (sec) 2115 ib_destroy_qp_security_abort(sec); 2116 return ret; 2117 } 2118 2119 if (alt_path_sgid_attr) 2120 rdma_put_gid_attr(alt_path_sgid_attr); 2121 if (av_sgid_attr) 2122 rdma_put_gid_attr(av_sgid_attr); 2123 2124 ib_qp_usecnt_dec(qp); 2125 if (sec) 2126 ib_destroy_qp_security_end(sec); 2127 2128 rdma_restrack_del(&qp->res); 2129 kfree(qp); 2130 return ret; 2131} 2132EXPORT_SYMBOL(ib_destroy_qp_user); 2133 2134/* Completion queues */ 2135 2136struct ib_cq *__ib_create_cq(struct ib_device *device, 2137 ib_comp_handler comp_handler, 2138 void (*event_handler)(struct ib_event *, void *), 2139 void *cq_context, 2140 const struct ib_cq_init_attr *cq_attr, 2141 const char *caller) 2142{ 2143 struct ib_cq *cq; 2144 int ret; 2145 2146 cq = rdma_zalloc_drv_obj(device, ib_cq); 2147 if (!cq) 2148 return ERR_PTR(-ENOMEM); 2149 2150 cq->device = device; 2151 cq->uobject = NULL; 2152 cq->comp_handler = comp_handler; 2153 cq->event_handler = event_handler; 2154 cq->cq_context = cq_context; 2155 atomic_set(&cq->usecnt, 0); 2156 2157 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 2158 rdma_restrack_set_name(&cq->res, caller); 2159 2160 ret = device->ops.create_cq(cq, cq_attr, NULL); 2161 if (ret) { 2162 rdma_restrack_put(&cq->res); 2163 kfree(cq); 2164 return ERR_PTR(ret); 2165 } 2166 2167 rdma_restrack_add(&cq->res); 2168 return cq; 2169} 2170EXPORT_SYMBOL(__ib_create_cq); 2171 2172int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period) 2173{ 2174 if (cq->shared) 2175 return -EOPNOTSUPP; 2176 2177 return cq->device->ops.modify_cq ? 2178 cq->device->ops.modify_cq(cq, cq_count, 2179 cq_period) : -EOPNOTSUPP; 2180} 2181EXPORT_SYMBOL(rdma_set_cq_moderation); 2182 2183int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata) 2184{ 2185 int ret; 2186 2187 if (WARN_ON_ONCE(cq->shared)) 2188 return -EOPNOTSUPP; 2189 2190 if (atomic_read(&cq->usecnt)) 2191 return -EBUSY; 2192 2193 ret = cq->device->ops.destroy_cq(cq, udata); 2194 if (ret) 2195 return ret; 2196 2197 rdma_restrack_del(&cq->res); 2198 kfree(cq); 2199 return ret; 2200} 2201EXPORT_SYMBOL(ib_destroy_cq_user); 2202 2203int ib_resize_cq(struct ib_cq *cq, int cqe) 2204{ 2205 if (cq->shared) 2206 return -EOPNOTSUPP; 2207 2208 return cq->device->ops.resize_cq ? 2209 cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP; 2210} 2211EXPORT_SYMBOL(ib_resize_cq); 2212 2213/* Memory regions */ 2214 2215struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 2216 u64 virt_addr, int access_flags) 2217{ 2218 struct ib_mr *mr; 2219 2220 if (access_flags & IB_ACCESS_ON_DEMAND) { 2221 if (!(pd->device->attrs.kernel_cap_flags & 2222 IBK_ON_DEMAND_PAGING)) { 2223 pr_debug("ODP support not available\n"); 2224 return ERR_PTR(-EINVAL); 2225 } 2226 } 2227 2228 mr = pd->device->ops.reg_user_mr(pd, start, length, virt_addr, 2229 access_flags, NULL, NULL); 2230 2231 if (IS_ERR(mr)) 2232 return mr; 2233 2234 mr->device = pd->device; 2235 mr->type = IB_MR_TYPE_USER; 2236 mr->pd = pd; 2237 mr->dm = NULL; 2238 atomic_inc(&pd->usecnt); 2239 mr->iova = virt_addr; 2240 mr->length = length; 2241 2242 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 2243 rdma_restrack_parent_name(&mr->res, &pd->res); 2244 rdma_restrack_add(&mr->res); 2245 2246 return mr; 2247} 2248EXPORT_SYMBOL(ib_reg_user_mr); 2249 2250int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice, 2251 u32 flags, struct ib_sge *sg_list, u32 num_sge) 2252{ 2253 if (!pd->device->ops.advise_mr) 2254 return -EOPNOTSUPP; 2255 2256 if (!num_sge) 2257 return 0; 2258 2259 return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge, 2260 NULL); 2261} 2262EXPORT_SYMBOL(ib_advise_mr); 2263 2264int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata) 2265{ 2266 struct ib_pd *pd = mr->pd; 2267 struct ib_dm *dm = mr->dm; 2268 struct ib_dmah *dmah = mr->dmah; 2269 struct ib_sig_attrs *sig_attrs = mr->sig_attrs; 2270 int ret; 2271 2272 trace_mr_dereg(mr); 2273 rdma_restrack_del(&mr->res); 2274 ret = mr->device->ops.dereg_mr(mr, udata); 2275 if (!ret) { 2276 atomic_dec(&pd->usecnt); 2277 if (dm) 2278 atomic_dec(&dm->usecnt); 2279 if (dmah) 2280 atomic_dec(&dmah->usecnt); 2281 kfree(sig_attrs); 2282 } 2283 2284 return ret; 2285} 2286EXPORT_SYMBOL(ib_dereg_mr_user); 2287 2288/** 2289 * ib_alloc_mr() - Allocates a memory region 2290 * @pd: protection domain associated with the region 2291 * @mr_type: memory region type 2292 * @max_num_sg: maximum sg entries available for registration. 2293 * 2294 * Notes: 2295 * Memory registeration page/sg lists must not exceed max_num_sg. 2296 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed 2297 * max_num_sg * used_page_size. 2298 * 2299 */ 2300struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type, 2301 u32 max_num_sg) 2302{ 2303 struct ib_mr *mr; 2304 2305 if (!pd->device->ops.alloc_mr) { 2306 mr = ERR_PTR(-EOPNOTSUPP); 2307 goto out; 2308 } 2309 2310 if (mr_type == IB_MR_TYPE_INTEGRITY) { 2311 WARN_ON_ONCE(1); 2312 mr = ERR_PTR(-EINVAL); 2313 goto out; 2314 } 2315 2316 mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg); 2317 if (IS_ERR(mr)) 2318 goto out; 2319 2320 mr->device = pd->device; 2321 mr->pd = pd; 2322 mr->dm = NULL; 2323 mr->uobject = NULL; 2324 atomic_inc(&pd->usecnt); 2325 mr->need_inval = false; 2326 mr->type = mr_type; 2327 mr->sig_attrs = NULL; 2328 2329 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 2330 rdma_restrack_parent_name(&mr->res, &pd->res); 2331 rdma_restrack_add(&mr->res); 2332out: 2333 trace_mr_alloc(pd, mr_type, max_num_sg, mr); 2334 return mr; 2335} 2336EXPORT_SYMBOL(ib_alloc_mr); 2337 2338/** 2339 * ib_alloc_mr_integrity() - Allocates an integrity memory region 2340 * @pd: protection domain associated with the region 2341 * @max_num_data_sg: maximum data sg entries available for registration 2342 * @max_num_meta_sg: maximum metadata sg entries available for 2343 * registration 2344 * 2345 * Notes: 2346 * Memory registration page/sg lists must not exceed max_num_sg, 2347 * also the integrity page/sg lists must not exceed max_num_meta_sg. 2348 * 2349 */ 2350struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd, 2351 u32 max_num_data_sg, 2352 u32 max_num_meta_sg) 2353{ 2354 struct ib_mr *mr; 2355 struct ib_sig_attrs *sig_attrs; 2356 2357 if (!pd->device->ops.alloc_mr_integrity || 2358 !pd->device->ops.map_mr_sg_pi) { 2359 mr = ERR_PTR(-EOPNOTSUPP); 2360 goto out; 2361 } 2362 2363 if (!max_num_meta_sg) { 2364 mr = ERR_PTR(-EINVAL); 2365 goto out; 2366 } 2367 2368 sig_attrs = kzalloc(sizeof(struct ib_sig_attrs), GFP_KERNEL); 2369 if (!sig_attrs) { 2370 mr = ERR_PTR(-ENOMEM); 2371 goto out; 2372 } 2373 2374 mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg, 2375 max_num_meta_sg); 2376 if (IS_ERR(mr)) { 2377 kfree(sig_attrs); 2378 goto out; 2379 } 2380 2381 mr->device = pd->device; 2382 mr->pd = pd; 2383 mr->dm = NULL; 2384 mr->uobject = NULL; 2385 atomic_inc(&pd->usecnt); 2386 mr->need_inval = false; 2387 mr->type = IB_MR_TYPE_INTEGRITY; 2388 mr->sig_attrs = sig_attrs; 2389 2390 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR); 2391 rdma_restrack_parent_name(&mr->res, &pd->res); 2392 rdma_restrack_add(&mr->res); 2393out: 2394 trace_mr_integ_alloc(pd, max_num_data_sg, max_num_meta_sg, mr); 2395 return mr; 2396} 2397EXPORT_SYMBOL(ib_alloc_mr_integrity); 2398 2399/* Multicast groups */ 2400 2401static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid) 2402{ 2403 struct ib_qp_init_attr init_attr = {}; 2404 struct ib_qp_attr attr = {}; 2405 int num_eth_ports = 0; 2406 unsigned int port; 2407 2408 /* If QP state >= init, it is assigned to a port and we can check this 2409 * port only. 2410 */ 2411 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) { 2412 if (attr.qp_state >= IB_QPS_INIT) { 2413 if (rdma_port_get_link_layer(qp->device, attr.port_num) != 2414 IB_LINK_LAYER_INFINIBAND) 2415 return true; 2416 goto lid_check; 2417 } 2418 } 2419 2420 /* Can't get a quick answer, iterate over all ports */ 2421 rdma_for_each_port(qp->device, port) 2422 if (rdma_port_get_link_layer(qp->device, port) != 2423 IB_LINK_LAYER_INFINIBAND) 2424 num_eth_ports++; 2425 2426 /* If we have at lease one Ethernet port, RoCE annex declares that 2427 * multicast LID should be ignored. We can't tell at this step if the 2428 * QP belongs to an IB or Ethernet port. 2429 */ 2430 if (num_eth_ports) 2431 return true; 2432 2433 /* If all the ports are IB, we can check according to IB spec. */ 2434lid_check: 2435 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || 2436 lid == be16_to_cpu(IB_LID_PERMISSIVE)); 2437} 2438 2439int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 2440{ 2441 int ret; 2442 2443 if (!qp->device->ops.attach_mcast) 2444 return -EOPNOTSUPP; 2445 2446 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 2447 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 2448 return -EINVAL; 2449 2450 ret = qp->device->ops.attach_mcast(qp, gid, lid); 2451 if (!ret) 2452 atomic_inc(&qp->usecnt); 2453 return ret; 2454} 2455EXPORT_SYMBOL(ib_attach_mcast); 2456 2457int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 2458{ 2459 int ret; 2460 2461 if (!qp->device->ops.detach_mcast) 2462 return -EOPNOTSUPP; 2463 2464 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 2465 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 2466 return -EINVAL; 2467 2468 ret = qp->device->ops.detach_mcast(qp, gid, lid); 2469 if (!ret) 2470 atomic_dec(&qp->usecnt); 2471 return ret; 2472} 2473EXPORT_SYMBOL(ib_detach_mcast); 2474 2475/** 2476 * ib_alloc_xrcd_user - Allocates an XRC domain. 2477 * @device: The device on which to allocate the XRC domain. 2478 * @inode: inode to connect XRCD 2479 * @udata: Valid user data or NULL for kernel object 2480 */ 2481struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device, 2482 struct inode *inode, struct ib_udata *udata) 2483{ 2484 struct ib_xrcd *xrcd; 2485 int ret; 2486 2487 if (!device->ops.alloc_xrcd) 2488 return ERR_PTR(-EOPNOTSUPP); 2489 2490 xrcd = rdma_zalloc_drv_obj(device, ib_xrcd); 2491 if (!xrcd) 2492 return ERR_PTR(-ENOMEM); 2493 2494 xrcd->device = device; 2495 xrcd->inode = inode; 2496 atomic_set(&xrcd->usecnt, 0); 2497 init_rwsem(&xrcd->tgt_qps_rwsem); 2498 xa_init(&xrcd->tgt_qps); 2499 2500 ret = device->ops.alloc_xrcd(xrcd, udata); 2501 if (ret) 2502 goto err; 2503 return xrcd; 2504err: 2505 kfree(xrcd); 2506 return ERR_PTR(ret); 2507} 2508EXPORT_SYMBOL(ib_alloc_xrcd_user); 2509 2510/** 2511 * ib_dealloc_xrcd_user - Deallocates an XRC domain. 2512 * @xrcd: The XRC domain to deallocate. 2513 * @udata: Valid user data or NULL for kernel object 2514 */ 2515int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata) 2516{ 2517 int ret; 2518 2519 if (atomic_read(&xrcd->usecnt)) 2520 return -EBUSY; 2521 2522 WARN_ON(!xa_empty(&xrcd->tgt_qps)); 2523 ret = xrcd->device->ops.dealloc_xrcd(xrcd, udata); 2524 if (ret) 2525 return ret; 2526 kfree(xrcd); 2527 return ret; 2528} 2529EXPORT_SYMBOL(ib_dealloc_xrcd_user); 2530 2531/** 2532 * ib_create_wq - Creates a WQ associated with the specified protection 2533 * domain. 2534 * @pd: The protection domain associated with the WQ. 2535 * @wq_attr: A list of initial attributes required to create the 2536 * WQ. If WQ creation succeeds, then the attributes are updated to 2537 * the actual capabilities of the created WQ. 2538 * 2539 * wq_attr->max_wr and wq_attr->max_sge determine 2540 * the requested size of the WQ, and set to the actual values allocated 2541 * on return. 2542 * If ib_create_wq() succeeds, then max_wr and max_sge will always be 2543 * at least as large as the requested values. 2544 */ 2545struct ib_wq *ib_create_wq(struct ib_pd *pd, 2546 struct ib_wq_init_attr *wq_attr) 2547{ 2548 struct ib_wq *wq; 2549 2550 if (!pd->device->ops.create_wq) 2551 return ERR_PTR(-EOPNOTSUPP); 2552 2553 wq = pd->device->ops.create_wq(pd, wq_attr, NULL); 2554 if (!IS_ERR(wq)) { 2555 wq->event_handler = wq_attr->event_handler; 2556 wq->wq_context = wq_attr->wq_context; 2557 wq->wq_type = wq_attr->wq_type; 2558 wq->cq = wq_attr->cq; 2559 wq->device = pd->device; 2560 wq->pd = pd; 2561 wq->uobject = NULL; 2562 atomic_inc(&pd->usecnt); 2563 atomic_inc(&wq_attr->cq->usecnt); 2564 atomic_set(&wq->usecnt, 0); 2565 } 2566 return wq; 2567} 2568EXPORT_SYMBOL(ib_create_wq); 2569 2570/** 2571 * ib_destroy_wq_user - Destroys the specified user WQ. 2572 * @wq: The WQ to destroy. 2573 * @udata: Valid user data 2574 */ 2575int ib_destroy_wq_user(struct ib_wq *wq, struct ib_udata *udata) 2576{ 2577 struct ib_cq *cq = wq->cq; 2578 struct ib_pd *pd = wq->pd; 2579 int ret; 2580 2581 if (atomic_read(&wq->usecnt)) 2582 return -EBUSY; 2583 2584 ret = wq->device->ops.destroy_wq(wq, udata); 2585 if (ret) 2586 return ret; 2587 2588 atomic_dec(&pd->usecnt); 2589 atomic_dec(&cq->usecnt); 2590 return ret; 2591} 2592EXPORT_SYMBOL(ib_destroy_wq_user); 2593 2594int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 2595 struct ib_mr_status *mr_status) 2596{ 2597 if (!mr->device->ops.check_mr_status) 2598 return -EOPNOTSUPP; 2599 2600 return mr->device->ops.check_mr_status(mr, check_mask, mr_status); 2601} 2602EXPORT_SYMBOL(ib_check_mr_status); 2603 2604int ib_set_vf_link_state(struct ib_device *device, int vf, u32 port, 2605 int state) 2606{ 2607 if (!device->ops.set_vf_link_state) 2608 return -EOPNOTSUPP; 2609 2610 return device->ops.set_vf_link_state(device, vf, port, state); 2611} 2612EXPORT_SYMBOL(ib_set_vf_link_state); 2613 2614int ib_get_vf_config(struct ib_device *device, int vf, u32 port, 2615 struct ifla_vf_info *info) 2616{ 2617 if (!device->ops.get_vf_config) 2618 return -EOPNOTSUPP; 2619 2620 return device->ops.get_vf_config(device, vf, port, info); 2621} 2622EXPORT_SYMBOL(ib_get_vf_config); 2623 2624int ib_get_vf_stats(struct ib_device *device, int vf, u32 port, 2625 struct ifla_vf_stats *stats) 2626{ 2627 if (!device->ops.get_vf_stats) 2628 return -EOPNOTSUPP; 2629 2630 return device->ops.get_vf_stats(device, vf, port, stats); 2631} 2632EXPORT_SYMBOL(ib_get_vf_stats); 2633 2634int ib_set_vf_guid(struct ib_device *device, int vf, u32 port, u64 guid, 2635 int type) 2636{ 2637 if (!device->ops.set_vf_guid) 2638 return -EOPNOTSUPP; 2639 2640 return device->ops.set_vf_guid(device, vf, port, guid, type); 2641} 2642EXPORT_SYMBOL(ib_set_vf_guid); 2643 2644int ib_get_vf_guid(struct ib_device *device, int vf, u32 port, 2645 struct ifla_vf_guid *node_guid, 2646 struct ifla_vf_guid *port_guid) 2647{ 2648 if (!device->ops.get_vf_guid) 2649 return -EOPNOTSUPP; 2650 2651 return device->ops.get_vf_guid(device, vf, port, node_guid, port_guid); 2652} 2653EXPORT_SYMBOL(ib_get_vf_guid); 2654/** 2655 * ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection 2656 * information) and set an appropriate memory region for registration. 2657 * @mr: memory region 2658 * @data_sg: dma mapped scatterlist for data 2659 * @data_sg_nents: number of entries in data_sg 2660 * @data_sg_offset: offset in bytes into data_sg 2661 * @meta_sg: dma mapped scatterlist for metadata 2662 * @meta_sg_nents: number of entries in meta_sg 2663 * @meta_sg_offset: offset in bytes into meta_sg 2664 * @page_size: page vector desired page size 2665 * 2666 * Constraints: 2667 * - The MR must be allocated with type IB_MR_TYPE_INTEGRITY. 2668 * 2669 * Return: 0 on success. 2670 * 2671 * After this completes successfully, the memory region 2672 * is ready for registration. 2673 */ 2674int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg, 2675 int data_sg_nents, unsigned int *data_sg_offset, 2676 struct scatterlist *meta_sg, int meta_sg_nents, 2677 unsigned int *meta_sg_offset, unsigned int page_size) 2678{ 2679 if (unlikely(!mr->device->ops.map_mr_sg_pi || 2680 WARN_ON_ONCE(mr->type != IB_MR_TYPE_INTEGRITY))) 2681 return -EOPNOTSUPP; 2682 2683 mr->page_size = page_size; 2684 2685 return mr->device->ops.map_mr_sg_pi(mr, data_sg, data_sg_nents, 2686 data_sg_offset, meta_sg, 2687 meta_sg_nents, meta_sg_offset); 2688} 2689EXPORT_SYMBOL(ib_map_mr_sg_pi); 2690 2691/** 2692 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list 2693 * and set it the memory region. 2694 * @mr: memory region 2695 * @sg: dma mapped scatterlist 2696 * @sg_nents: number of entries in sg 2697 * @sg_offset: offset in bytes into sg 2698 * @page_size: page vector desired page size 2699 * 2700 * Constraints: 2701 * 2702 * - The first sg element is allowed to have an offset. 2703 * - Each sg element must either be aligned to page_size or virtually 2704 * contiguous to the previous element. In case an sg element has a 2705 * non-contiguous offset, the mapping prefix will not include it. 2706 * - The last sg element is allowed to have length less than page_size. 2707 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size 2708 * then only max_num_sg entries will be mapped. 2709 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these 2710 * constraints holds and the page_size argument is ignored. 2711 * 2712 * Returns the number of sg elements that were mapped to the memory region. 2713 * 2714 * After this completes successfully, the memory region 2715 * is ready for registration. 2716 */ 2717int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 2718 unsigned int *sg_offset, unsigned int page_size) 2719{ 2720 if (unlikely(!mr->device->ops.map_mr_sg)) 2721 return -EOPNOTSUPP; 2722 2723 mr->page_size = page_size; 2724 2725 return mr->device->ops.map_mr_sg(mr, sg, sg_nents, sg_offset); 2726} 2727EXPORT_SYMBOL(ib_map_mr_sg); 2728 2729/** 2730 * ib_sg_to_pages() - Convert the largest prefix of a sg list 2731 * to a page vector 2732 * @mr: memory region 2733 * @sgl: dma mapped scatterlist 2734 * @sg_nents: number of entries in sg 2735 * @sg_offset_p: ==== ======================================================= 2736 * IN start offset in bytes into sg 2737 * OUT offset in bytes for element n of the sg of the first 2738 * byte that has not been processed where n is the return 2739 * value of this function. 2740 * ==== ======================================================= 2741 * @set_page: driver page assignment function pointer 2742 * 2743 * Core service helper for drivers to convert the largest 2744 * prefix of given sg list to a page vector. The sg list 2745 * prefix converted is the prefix that meet the requirements 2746 * of ib_map_mr_sg. 2747 * 2748 * Returns the number of sg elements that were assigned to 2749 * a page vector. 2750 */ 2751int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 2752 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64)) 2753{ 2754 struct scatterlist *sg; 2755 u64 last_end_dma_addr = 0; 2756 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0; 2757 unsigned int last_page_off = 0; 2758 u64 page_mask = ~((u64)mr->page_size - 1); 2759 int i, ret; 2760 2761 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0]))) 2762 return -EINVAL; 2763 2764 mr->iova = sg_dma_address(&sgl[0]) + sg_offset; 2765 mr->length = 0; 2766 2767 for_each_sg(sgl, sg, sg_nents, i) { 2768 u64 dma_addr = sg_dma_address(sg) + sg_offset; 2769 u64 prev_addr = dma_addr; 2770 unsigned int dma_len = sg_dma_len(sg) - sg_offset; 2771 u64 end_dma_addr = dma_addr + dma_len; 2772 u64 page_addr = dma_addr & page_mask; 2773 2774 /* 2775 * For the second and later elements, check whether either the 2776 * end of element i-1 or the start of element i is not aligned 2777 * on a page boundary. 2778 */ 2779 if (i && (last_page_off != 0 || page_addr != dma_addr)) { 2780 /* Stop mapping if there is a gap. */ 2781 if (last_end_dma_addr != dma_addr) 2782 break; 2783 2784 /* 2785 * Coalesce this element with the last. If it is small 2786 * enough just update mr->length. Otherwise start 2787 * mapping from the next page. 2788 */ 2789 goto next_page; 2790 } 2791 2792 do { 2793 ret = set_page(mr, page_addr); 2794 if (unlikely(ret < 0)) { 2795 sg_offset = prev_addr - sg_dma_address(sg); 2796 mr->length += prev_addr - dma_addr; 2797 if (sg_offset_p) 2798 *sg_offset_p = sg_offset; 2799 return i || sg_offset ? i : ret; 2800 } 2801 prev_addr = page_addr; 2802next_page: 2803 page_addr += mr->page_size; 2804 } while (page_addr < end_dma_addr); 2805 2806 mr->length += dma_len; 2807 last_end_dma_addr = end_dma_addr; 2808 last_page_off = end_dma_addr & ~page_mask; 2809 2810 sg_offset = 0; 2811 } 2812 2813 if (sg_offset_p) 2814 *sg_offset_p = 0; 2815 return i; 2816} 2817EXPORT_SYMBOL(ib_sg_to_pages); 2818 2819struct ib_drain_cqe { 2820 struct ib_cqe cqe; 2821 struct completion done; 2822}; 2823 2824static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc) 2825{ 2826 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe, 2827 cqe); 2828 2829 complete(&cqe->done); 2830} 2831 2832/* 2833 * Post a WR and block until its completion is reaped for the SQ. 2834 */ 2835static void __ib_drain_sq(struct ib_qp *qp) 2836{ 2837 struct ib_cq *cq = qp->send_cq; 2838 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2839 struct ib_drain_cqe sdrain; 2840 struct ib_rdma_wr swr = { 2841 .wr = { 2842 .next = NULL, 2843 { .wr_cqe = &sdrain.cqe, }, 2844 .opcode = IB_WR_RDMA_WRITE, 2845 }, 2846 }; 2847 int ret; 2848 2849 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2850 if (ret) { 2851 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2852 return; 2853 } 2854 2855 sdrain.cqe.done = ib_drain_qp_done; 2856 init_completion(&sdrain.done); 2857 2858 ret = ib_post_send(qp, &swr.wr, NULL); 2859 if (ret) { 2860 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2861 return; 2862 } 2863 2864 if (cq->poll_ctx == IB_POLL_DIRECT) 2865 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0) 2866 ib_process_cq_direct(cq, -1); 2867 else 2868 wait_for_completion(&sdrain.done); 2869} 2870 2871/* 2872 * Post a WR and block until its completion is reaped for the RQ. 2873 */ 2874static void __ib_drain_rq(struct ib_qp *qp) 2875{ 2876 struct ib_cq *cq = qp->recv_cq; 2877 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2878 struct ib_drain_cqe rdrain; 2879 struct ib_recv_wr rwr = {}; 2880 int ret; 2881 2882 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2883 if (ret) { 2884 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2885 return; 2886 } 2887 2888 rwr.wr_cqe = &rdrain.cqe; 2889 rdrain.cqe.done = ib_drain_qp_done; 2890 init_completion(&rdrain.done); 2891 2892 ret = ib_post_recv(qp, &rwr, NULL); 2893 if (ret) { 2894 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2895 return; 2896 } 2897 2898 if (cq->poll_ctx == IB_POLL_DIRECT) 2899 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0) 2900 ib_process_cq_direct(cq, -1); 2901 else 2902 wait_for_completion(&rdrain.done); 2903} 2904 2905/* 2906 * __ib_drain_srq() - Block until Last WQE Reached event arrives, or timeout 2907 * expires. 2908 * @qp: queue pair associated with SRQ to drain 2909 * 2910 * Quoting 10.3.1 Queue Pair and EE Context States: 2911 * 2912 * Note, for QPs that are associated with an SRQ, the Consumer should take the 2913 * QP through the Error State before invoking a Destroy QP or a Modify QP to the 2914 * Reset State. The Consumer may invoke the Destroy QP without first performing 2915 * a Modify QP to the Error State and waiting for the Affiliated Asynchronous 2916 * Last WQE Reached Event. However, if the Consumer does not wait for the 2917 * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment 2918 * leakage may occur. Therefore, it is good programming practice to tear down a 2919 * QP that is associated with an SRQ by using the following process: 2920 * 2921 * - Put the QP in the Error State 2922 * - Wait for the Affiliated Asynchronous Last WQE Reached Event; 2923 * - either: 2924 * drain the CQ by invoking the Poll CQ verb and either wait for CQ 2925 * to be empty or the number of Poll CQ operations has exceeded 2926 * CQ capacity size; 2927 * - or 2928 * post another WR that completes on the same CQ and wait for this 2929 * WR to return as a WC; 2930 * - and then invoke a Destroy QP or Reset QP. 2931 * 2932 * We use the first option. 2933 */ 2934static void __ib_drain_srq(struct ib_qp *qp) 2935{ 2936 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2937 struct ib_cq *cq; 2938 int n, polled = 0; 2939 int ret; 2940 2941 if (!qp->srq) { 2942 WARN_ONCE(1, "QP 0x%p is not associated with SRQ\n", qp); 2943 return; 2944 } 2945 2946 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2947 if (ret) { 2948 WARN_ONCE(ret, "failed to drain shared recv queue: %d\n", ret); 2949 return; 2950 } 2951 2952 if (ib_srq_has_cq(qp->srq->srq_type)) { 2953 cq = qp->srq->ext.cq; 2954 } else if (qp->recv_cq) { 2955 cq = qp->recv_cq; 2956 } else { 2957 WARN_ONCE(1, "QP 0x%p has no CQ associated with SRQ\n", qp); 2958 return; 2959 } 2960 2961 if (wait_for_completion_timeout(&qp->srq_completion, 60 * HZ) > 0) { 2962 while (polled != cq->cqe) { 2963 n = ib_process_cq_direct(cq, cq->cqe - polled); 2964 if (!n) 2965 return; 2966 polled += n; 2967 } 2968 } 2969} 2970 2971/** 2972 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the 2973 * application. 2974 * @qp: queue pair to drain 2975 * 2976 * If the device has a provider-specific drain function, then 2977 * call that. Otherwise call the generic drain function 2978 * __ib_drain_sq(). 2979 * 2980 * The caller must: 2981 * 2982 * ensure there is room in the CQ and SQ for the drain work request and 2983 * completion. 2984 * 2985 * allocate the CQ using ib_alloc_cq(). 2986 * 2987 * ensure that there are no other contexts that are posting WRs concurrently. 2988 * Otherwise the drain is not guaranteed. 2989 */ 2990void ib_drain_sq(struct ib_qp *qp) 2991{ 2992 if (qp->device->ops.drain_sq) 2993 qp->device->ops.drain_sq(qp); 2994 else 2995 __ib_drain_sq(qp); 2996 trace_cq_drain_complete(qp->send_cq); 2997} 2998EXPORT_SYMBOL(ib_drain_sq); 2999 3000/** 3001 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the 3002 * application. 3003 * @qp: queue pair to drain 3004 * 3005 * If the device has a provider-specific drain function, then 3006 * call that. Otherwise call the generic drain function 3007 * __ib_drain_rq(). 3008 * 3009 * The caller must: 3010 * 3011 * ensure there is room in the CQ and RQ for the drain work request and 3012 * completion. 3013 * 3014 * allocate the CQ using ib_alloc_cq(). 3015 * 3016 * ensure that there are no other contexts that are posting WRs concurrently. 3017 * Otherwise the drain is not guaranteed. 3018 */ 3019void ib_drain_rq(struct ib_qp *qp) 3020{ 3021 if (qp->device->ops.drain_rq) 3022 qp->device->ops.drain_rq(qp); 3023 else 3024 __ib_drain_rq(qp); 3025 trace_cq_drain_complete(qp->recv_cq); 3026} 3027EXPORT_SYMBOL(ib_drain_rq); 3028 3029/** 3030 * ib_drain_qp() - Block until all CQEs have been consumed by the 3031 * application on both the RQ and SQ. 3032 * @qp: queue pair to drain 3033 * 3034 * The caller must: 3035 * 3036 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests 3037 * and completions. 3038 * 3039 * allocate the CQs using ib_alloc_cq(). 3040 * 3041 * ensure that there are no other contexts that are posting WRs concurrently. 3042 * Otherwise the drain is not guaranteed. 3043 */ 3044void ib_drain_qp(struct ib_qp *qp) 3045{ 3046 ib_drain_sq(qp); 3047 if (!qp->srq) 3048 ib_drain_rq(qp); 3049 else 3050 __ib_drain_srq(qp); 3051} 3052EXPORT_SYMBOL(ib_drain_qp); 3053 3054struct net_device *rdma_alloc_netdev(struct ib_device *device, u32 port_num, 3055 enum rdma_netdev_t type, const char *name, 3056 unsigned char name_assign_type, 3057 void (*setup)(struct net_device *)) 3058{ 3059 struct rdma_netdev_alloc_params params; 3060 struct net_device *netdev; 3061 int rc; 3062 3063 if (!device->ops.rdma_netdev_get_params) 3064 return ERR_PTR(-EOPNOTSUPP); 3065 3066 rc = device->ops.rdma_netdev_get_params(device, port_num, type, 3067 ¶ms); 3068 if (rc) 3069 return ERR_PTR(rc); 3070 3071 netdev = alloc_netdev_mqs(params.sizeof_priv, name, name_assign_type, 3072 setup, params.txqs, params.rxqs); 3073 if (!netdev) 3074 return ERR_PTR(-ENOMEM); 3075 3076 return netdev; 3077} 3078EXPORT_SYMBOL(rdma_alloc_netdev); 3079 3080int rdma_init_netdev(struct ib_device *device, u32 port_num, 3081 enum rdma_netdev_t type, const char *name, 3082 unsigned char name_assign_type, 3083 void (*setup)(struct net_device *), 3084 struct net_device *netdev) 3085{ 3086 struct rdma_netdev_alloc_params params; 3087 int rc; 3088 3089 if (!device->ops.rdma_netdev_get_params) 3090 return -EOPNOTSUPP; 3091 3092 rc = device->ops.rdma_netdev_get_params(device, port_num, type, 3093 ¶ms); 3094 if (rc) 3095 return rc; 3096 3097 return params.initialize_rdma_netdev(device, port_num, 3098 netdev, params.param); 3099} 3100EXPORT_SYMBOL(rdma_init_netdev); 3101 3102void __rdma_block_iter_start(struct ib_block_iter *biter, 3103 struct scatterlist *sglist, unsigned int nents, 3104 unsigned long pgsz) 3105{ 3106 memset(biter, 0, sizeof(struct ib_block_iter)); 3107 biter->__sg = sglist; 3108 biter->__sg_nents = nents; 3109 3110 /* Driver provides best block size to use */ 3111 biter->__pg_bit = __fls(pgsz); 3112} 3113EXPORT_SYMBOL(__rdma_block_iter_start); 3114 3115bool __rdma_block_iter_next(struct ib_block_iter *biter) 3116{ 3117 unsigned int block_offset; 3118 unsigned int delta; 3119 3120 if (!biter->__sg_nents || !biter->__sg) 3121 return false; 3122 3123 biter->__dma_addr = sg_dma_address(biter->__sg) + biter->__sg_advance; 3124 block_offset = biter->__dma_addr & (BIT_ULL(biter->__pg_bit) - 1); 3125 delta = BIT_ULL(biter->__pg_bit) - block_offset; 3126 3127 while (biter->__sg_nents && biter->__sg && 3128 sg_dma_len(biter->__sg) - biter->__sg_advance <= delta) { 3129 delta -= sg_dma_len(biter->__sg) - biter->__sg_advance; 3130 biter->__sg_advance = 0; 3131 biter->__sg = sg_next(biter->__sg); 3132 biter->__sg_nents--; 3133 } 3134 biter->__sg_advance += delta; 3135 3136 return true; 3137} 3138EXPORT_SYMBOL(__rdma_block_iter_next); 3139 3140/** 3141 * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct 3142 * for the drivers. 3143 * @descs: array of static descriptors 3144 * @num_counters: number of elements in array 3145 * @lifespan: milliseconds between updates 3146 */ 3147struct rdma_hw_stats *rdma_alloc_hw_stats_struct( 3148 const struct rdma_stat_desc *descs, int num_counters, 3149 unsigned long lifespan) 3150{ 3151 struct rdma_hw_stats *stats; 3152 3153 stats = kzalloc(struct_size(stats, value, num_counters), GFP_KERNEL); 3154 if (!stats) 3155 return NULL; 3156 3157 stats->is_disabled = kcalloc(BITS_TO_LONGS(num_counters), 3158 sizeof(*stats->is_disabled), GFP_KERNEL); 3159 if (!stats->is_disabled) 3160 goto err; 3161 3162 stats->descs = descs; 3163 stats->num_counters = num_counters; 3164 stats->lifespan = msecs_to_jiffies(lifespan); 3165 mutex_init(&stats->lock); 3166 3167 return stats; 3168 3169err: 3170 kfree(stats); 3171 return NULL; 3172} 3173EXPORT_SYMBOL(rdma_alloc_hw_stats_struct); 3174 3175/** 3176 * rdma_free_hw_stats_struct - Helper function to release rdma_hw_stats 3177 * @stats: statistics to release 3178 */ 3179void rdma_free_hw_stats_struct(struct rdma_hw_stats *stats) 3180{ 3181 if (!stats) 3182 return; 3183 3184 kfree(stats->is_disabled); 3185 kfree(stats); 3186} 3187EXPORT_SYMBOL(rdma_free_hw_stats_struct);
~/
Read-only file preview.