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