1/*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved. 5 * Copyright (c) 2004 Infinicon Corporation. All rights reserved. 6 * Copyright (c) 2004 Intel Corporation. All rights reserved. 7 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 8 * Copyright (c) 2004 Voltaire Corporation. All rights reserved. 9 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 10 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. 11 * 12 * This software is available to you under a choice of one of two 13 * licenses. You may choose to be licensed under the terms of the GNU 14 * General Public License (GPL) Version 2, available from the file 15 * COPYING in the main directory of this source tree, or the 16 * OpenIB.org BSD license below: 17 * 18 * Redistribution and use in source and binary forms, with or 19 * without modification, are permitted provided that the following 20 * conditions are met: 21 * 22 * - Redistributions of source code must retain the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer. 25 * 26 * - Redistributions in binary form must reproduce the above 27 * copyright notice, this list of conditions and the following 28 * disclaimer in the documentation and/or other materials 29 * provided with the distribution. 30 * 31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 35 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 36 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 37 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 38 * SOFTWARE. 39 */ 40 41#include <sys/cdefs.h> 42#include <linux/errno.h> 43#include <linux/err.h> 44#include <linux/string.h> 45#include <linux/slab.h> 46#include <linux/in.h> 47#include <linux/in6.h> 48#include <linux/wait.h> 49 50#include <rdma/ib_verbs.h> 51#include <rdma/ib_cache.h> 52#include <rdma/ib_addr.h> 53 54#include <netinet/ip.h> 55#include <netinet/ip6.h> 56 57#include <machine/in_cksum.h> 58 59#include "core_priv.h" 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 management 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] = "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(enum rdma_node_type node_type) 215{ 216 switch (node_type) { 217 case RDMA_NODE_IB_CA: 218 case RDMA_NODE_IB_SWITCH: 219 case RDMA_NODE_IB_ROUTER: 220 return RDMA_TRANSPORT_IB; 221 case RDMA_NODE_RNIC: 222 return RDMA_TRANSPORT_IWARP; 223 case RDMA_NODE_USNIC: 224 return RDMA_TRANSPORT_USNIC; 225 case RDMA_NODE_USNIC_UDP: 226 return RDMA_TRANSPORT_USNIC_UDP; 227 default: 228 BUG(); 229 return 0; 230 } 231} 232EXPORT_SYMBOL(rdma_node_get_transport); 233 234enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num) 235{ 236 if (device->get_link_layer) 237 return device->get_link_layer(device, port_num); 238 239 switch (rdma_node_get_transport(device->node_type)) { 240 case RDMA_TRANSPORT_IB: 241 return IB_LINK_LAYER_INFINIBAND; 242 case RDMA_TRANSPORT_IWARP: 243 case RDMA_TRANSPORT_USNIC: 244 case RDMA_TRANSPORT_USNIC_UDP: 245 return IB_LINK_LAYER_ETHERNET; 246 default: 247 return IB_LINK_LAYER_UNSPECIFIED; 248 } 249} 250EXPORT_SYMBOL(rdma_port_get_link_layer); 251 252/* Protection domains */ 253 254/** 255 * ib_alloc_pd - Allocates an unused protection domain. 256 * @device: The device on which to allocate the protection domain. 257 * 258 * A protection domain object provides an association between QPs, shared 259 * receive queues, address handles, memory regions, and memory windows. 260 * 261 * Every PD has a local_dma_lkey which can be used as the lkey value for local 262 * memory operations. 263 */ 264struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 265 const char *caller) 266{ 267 struct ib_pd *pd; 268 int mr_access_flags = 0; 269 int ret; 270 271 pd = rdma_zalloc_drv_obj(device, ib_pd); 272 if (!pd) 273 return ERR_PTR(-ENOMEM); 274 275 pd->device = device; 276 pd->uobject = NULL; 277 pd->__internal_mr = NULL; 278 atomic_set(&pd->usecnt, 0); 279 pd->flags = flags; 280 281 ret = device->alloc_pd(pd, NULL); 282 if (ret) { 283 kfree(pd); 284 return ERR_PTR(ret); 285 } 286 287 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) 288 pd->local_dma_lkey = device->local_dma_lkey; 289 else 290 mr_access_flags |= IB_ACCESS_LOCAL_WRITE; 291 292 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) { 293 pr_warn("%s: enabling unsafe global rkey\n", caller); 294 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE; 295 } 296 297 if (mr_access_flags) { 298 struct ib_mr *mr; 299 300 mr = pd->device->get_dma_mr(pd, mr_access_flags); 301 if (IS_ERR(mr)) { 302 ib_dealloc_pd(pd); 303 return ERR_CAST(mr); 304 } 305 306 mr->device = pd->device; 307 mr->pd = pd; 308 mr->type = IB_MR_TYPE_DMA; 309 mr->uobject = NULL; 310 mr->need_inval = false; 311 312 pd->__internal_mr = mr; 313 314 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) 315 pd->local_dma_lkey = pd->__internal_mr->lkey; 316 317 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) 318 pd->unsafe_global_rkey = pd->__internal_mr->rkey; 319 } 320 321 return pd; 322} 323EXPORT_SYMBOL(__ib_alloc_pd); 324 325/** 326 * ib_dealloc_pd_user - Deallocates a protection domain. 327 * @pd: The protection domain to deallocate. 328 * @udata: Valid user data or NULL for kernel object 329 * 330 * It is an error to call this function while any resources in the pd still 331 * exist. The caller is responsible to synchronously destroy them and 332 * guarantee no new allocations will happen. 333 */ 334void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata) 335{ 336 int ret; 337 338 if (pd->__internal_mr) { 339 ret = pd->device->dereg_mr(pd->__internal_mr, NULL); 340 WARN_ON(ret); 341 pd->__internal_mr = NULL; 342 } 343 344 /* uverbs manipulates usecnt with proper locking, while the kabi 345 requires the caller to guarantee we can't race here. */ 346 WARN_ON(atomic_read(&pd->usecnt)); 347 348 pd->device->dealloc_pd(pd, udata); 349 kfree(pd); 350} 351EXPORT_SYMBOL(ib_dealloc_pd_user); 352 353/* Address handles */ 354 355static struct ib_ah *_ib_create_ah(struct ib_pd *pd, 356 struct ib_ah_attr *ah_attr, 357 u32 flags, 358 struct ib_udata *udata) 359{ 360 struct ib_device *device = pd->device; 361 struct ib_ah *ah; 362 int ret; 363 364 might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE); 365 366 if (!device->create_ah) 367 return ERR_PTR(-EOPNOTSUPP); 368 369 ah = rdma_zalloc_drv_obj_gfp( 370 device, ib_ah, 371 (flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC); 372 if (!ah) 373 return ERR_PTR(-ENOMEM); 374 375 ah->device = device; 376 ah->pd = pd; 377 378 ret = device->create_ah(ah, ah_attr, flags, udata); 379 if (ret) { 380 kfree(ah); 381 return ERR_PTR(ret); 382 } 383 384 atomic_inc(&pd->usecnt); 385 return ah; 386} 387 388/** 389 * rdma_create_ah - Creates an address handle for the 390 * given address vector. 391 * @pd: The protection domain associated with the address handle. 392 * @ah_attr: The attributes of the address vector. 393 * @flags: Create address handle flags (see enum rdma_create_ah_flags). 394 * 395 * It returns 0 on success and returns appropriate error code on error. 396 * The address handle is used to reference a local or global destination 397 * in all UD QP post sends. 398 */ 399struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, 400 u32 flags) 401{ 402 struct ib_ah *ah; 403 404 ah = _ib_create_ah(pd, ah_attr, flags, NULL); 405 406 return ah; 407} 408EXPORT_SYMBOL(ib_create_ah); 409 410/** 411 * ib_create_user_ah - Creates an address handle for the 412 * given address vector. 413 * It resolves destination mac address for ah attribute of RoCE type. 414 * @pd: The protection domain associated with the address handle. 415 * @ah_attr: The attributes of the address vector. 416 * @udata: pointer to user's input output buffer information need by 417 * provider driver. 418 * 419 * It returns a valid address handle pointer on success and 420 * returns appropriate error code on error. 421 * The address handle is used to reference a local or global destination 422 * in all UD QP post sends. 423 */ 424struct ib_ah *ib_create_user_ah(struct ib_pd *pd, 425 struct ib_ah_attr *ah_attr, 426 struct ib_udata *udata) 427{ 428 int err; 429 430 if (rdma_protocol_roce(pd->device, ah_attr->port_num)) { 431 err = ib_resolve_eth_dmac(pd->device, ah_attr); 432 if (err) 433 return ERR_PTR(err); 434 } 435 436 return _ib_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE, udata); 437} 438EXPORT_SYMBOL(ib_create_user_ah); 439 440static int ib_get_header_version(const union rdma_network_hdr *hdr) 441{ 442 const struct ip *ip4h = (const struct ip *)&hdr->roce4grh; 443 struct ip ip4h_checked; 444 const struct ip6_hdr *ip6h = (const struct ip6_hdr *)&hdr->ibgrh; 445 446 /* If it's IPv6, the version must be 6, otherwise, the first 447 * 20 bytes (before the IPv4 header) are garbled. 448 */ 449 if ((ip6h->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) 450 return (ip4h->ip_v == 4) ? 4 : 0; 451 /* version may be 6 or 4 because the first 20 bytes could be garbled */ 452 453 /* RoCE v2 requires no options, thus header length 454 * must be 5 words 455 */ 456 if (ip4h->ip_hl != 5) 457 return 6; 458 459 /* Verify checksum. 460 * We can't write on scattered buffers so we need to copy to 461 * temp buffer. 462 */ 463 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked)); 464 ip4h_checked.ip_sum = 0; 465#if defined(INET) || defined(INET6) 466 ip4h_checked.ip_sum = in_cksum_hdr(&ip4h_checked); 467#endif 468 /* if IPv4 header checksum is OK, believe it */ 469 if (ip4h->ip_sum == ip4h_checked.ip_sum) 470 return 4; 471 return 6; 472} 473 474static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device, 475 u8 port_num, 476 const struct ib_grh *grh) 477{ 478 int grh_version; 479 480 if (rdma_protocol_ib(device, port_num)) 481 return RDMA_NETWORK_IB; 482 483 grh_version = ib_get_header_version((const union rdma_network_hdr *)grh); 484 485 if (grh_version == 4) 486 return RDMA_NETWORK_IPV4; 487 488 if (grh->next_hdr == IPPROTO_UDP) 489 return RDMA_NETWORK_IPV6; 490 491 return RDMA_NETWORK_ROCE_V1; 492} 493 494struct find_gid_index_context { 495 u16 vlan_id; 496 enum ib_gid_type gid_type; 497}; 498 499 500/* 501 * This function will return true only if a inspected GID index 502 * matches the request based on the GID type and VLAN configuration 503 */ 504static bool find_gid_index(const union ib_gid *gid, 505 const struct ib_gid_attr *gid_attr, 506 void *context) 507{ 508 u16 vlan_diff; 509 struct find_gid_index_context *ctx = 510 (struct find_gid_index_context *)context; 511 512 if (ctx->gid_type != gid_attr->gid_type) 513 return false; 514 515 /* 516 * The following will verify: 517 * 1. VLAN ID matching for VLAN tagged requests. 518 * 2. prio-tagged/untagged to prio-tagged/untagged matching. 519 * 520 * This XOR is valid, since 0x0 < vlan_id < 0x0FFF. 521 */ 522 vlan_diff = rdma_vlan_dev_vlan_id(gid_attr->ndev) ^ ctx->vlan_id; 523 524 return (vlan_diff == 0x0000 || vlan_diff == 0xFFFF); 525} 526 527static int get_sgid_index_from_eth(struct ib_device *device, u8 port_num, 528 u16 vlan_id, const union ib_gid *sgid, 529 enum ib_gid_type gid_type, 530 u16 *gid_index) 531{ 532 struct find_gid_index_context context = {.vlan_id = vlan_id, 533 .gid_type = gid_type}; 534 535 return ib_find_gid_by_filter(device, sgid, port_num, find_gid_index, 536 &context, gid_index); 537} 538 539static int get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 540 enum rdma_network_type net_type, 541 union ib_gid *sgid, union ib_gid *dgid) 542{ 543 struct sockaddr_in src_in; 544 struct sockaddr_in dst_in; 545 __be32 src_saddr, dst_saddr; 546 547 if (!sgid || !dgid) 548 return -EINVAL; 549 550 if (net_type == RDMA_NETWORK_IPV4) { 551 memcpy(&src_in.sin_addr.s_addr, 552 &hdr->roce4grh.ip_src, 4); 553 memcpy(&dst_in.sin_addr.s_addr, 554 &hdr->roce4grh.ip_dst, 4); 555 src_saddr = src_in.sin_addr.s_addr; 556 dst_saddr = dst_in.sin_addr.s_addr; 557 ipv6_addr_set_v4mapped(src_saddr, 558 (struct in6_addr *)sgid); 559 ipv6_addr_set_v4mapped(dst_saddr, 560 (struct in6_addr *)dgid); 561 return 0; 562 } else if (net_type == RDMA_NETWORK_IPV6 || 563 net_type == RDMA_NETWORK_IB) { 564 *dgid = hdr->ibgrh.dgid; 565 *sgid = hdr->ibgrh.sgid; 566 return 0; 567 } else { 568 return -EINVAL; 569 } 570} 571 572int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, 573 const struct ib_wc *wc, const struct ib_grh *grh, 574 struct ib_ah_attr *ah_attr) 575{ 576 u32 flow_class; 577 u16 gid_index = 0; 578 int ret; 579 enum rdma_network_type net_type = RDMA_NETWORK_IB; 580 enum ib_gid_type gid_type = IB_GID_TYPE_IB; 581 int hoplimit = 0xff; 582 union ib_gid dgid; 583 union ib_gid sgid; 584 585 memset(ah_attr, 0, sizeof *ah_attr); 586 if (rdma_cap_eth_ah(device, port_num)) { 587 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE) 588 net_type = wc->network_hdr_type; 589 else 590 net_type = ib_get_net_type_by_grh(device, port_num, grh); 591 gid_type = ib_network_to_gid_type(net_type); 592 } 593 ret = get_gids_from_rdma_hdr((const union rdma_network_hdr *)grh, net_type, 594 &sgid, &dgid); 595 if (ret) 596 return ret; 597 598 if (rdma_protocol_roce(device, port_num)) { 599 struct ib_gid_attr dgid_attr; 600 const u16 vlan_id = (wc->wc_flags & IB_WC_WITH_VLAN) ? 601 wc->vlan_id : 0xffff; 602 603 if (!(wc->wc_flags & IB_WC_GRH)) 604 return -EPROTOTYPE; 605 606 ret = get_sgid_index_from_eth(device, port_num, vlan_id, 607 &dgid, gid_type, &gid_index); 608 if (ret) 609 return ret; 610 611 ret = ib_get_cached_gid(device, port_num, gid_index, &dgid, &dgid_attr); 612 if (ret) 613 return ret; 614 615 if (dgid_attr.ndev == NULL) 616 return -ENODEV; 617 618 ret = rdma_addr_find_l2_eth_by_grh(&dgid, &sgid, ah_attr->dmac, 619 dgid_attr.ndev, &hoplimit); 620 621 dev_put(dgid_attr.ndev); 622 if (ret) 623 return ret; 624 } 625 626 ah_attr->dlid = wc->slid; 627 ah_attr->sl = wc->sl; 628 ah_attr->src_path_bits = wc->dlid_path_bits; 629 ah_attr->port_num = port_num; 630 631 if (wc->wc_flags & IB_WC_GRH) { 632 ah_attr->ah_flags = IB_AH_GRH; 633 ah_attr->grh.dgid = sgid; 634 635 if (!rdma_cap_eth_ah(device, port_num)) { 636 if (dgid.global.interface_id != cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) { 637 ret = ib_find_cached_gid_by_port(device, &dgid, 638 IB_GID_TYPE_IB, 639 port_num, NULL, 640 &gid_index); 641 if (ret) 642 return ret; 643 } 644 } 645 646 ah_attr->grh.sgid_index = (u8) gid_index; 647 flow_class = be32_to_cpu(grh->version_tclass_flow); 648 ah_attr->grh.flow_label = flow_class & 0xFFFFF; 649 ah_attr->grh.hop_limit = hoplimit; 650 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF; 651 } 652 return 0; 653} 654EXPORT_SYMBOL(ib_init_ah_from_wc); 655 656struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 657 const struct ib_grh *grh, u8 port_num) 658{ 659 struct ib_ah_attr ah_attr; 660 int ret; 661 662 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr); 663 if (ret) 664 return ERR_PTR(ret); 665 666 return ib_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE); 667} 668EXPORT_SYMBOL(ib_create_ah_from_wc); 669 670int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 671{ 672 return ah->device->modify_ah ? 673 ah->device->modify_ah(ah, ah_attr) : 674 -ENOSYS; 675} 676EXPORT_SYMBOL(ib_modify_ah); 677 678int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) 679{ 680 return ah->device->query_ah ? 681 ah->device->query_ah(ah, ah_attr) : 682 -ENOSYS; 683} 684EXPORT_SYMBOL(ib_query_ah); 685 686int ib_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata) 687{ 688 struct ib_pd *pd; 689 690 might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE); 691 692 pd = ah->pd; 693 ah->device->destroy_ah(ah, flags); 694 atomic_dec(&pd->usecnt); 695 696 kfree(ah); 697 return 0; 698} 699EXPORT_SYMBOL(ib_destroy_ah_user); 700 701/* Shared receive queues */ 702 703struct ib_srq *ib_create_srq(struct ib_pd *pd, 704 struct ib_srq_init_attr *srq_init_attr) 705{ 706 struct ib_srq *srq; 707 int ret; 708 709 if (!pd->device->create_srq) 710 return ERR_PTR(-EOPNOTSUPP); 711 712 srq = rdma_zalloc_drv_obj(pd->device, ib_srq); 713 if (!srq) 714 return ERR_PTR(-ENOMEM); 715 716 srq->device = pd->device; 717 srq->pd = pd; 718 srq->event_handler = srq_init_attr->event_handler; 719 srq->srq_context = srq_init_attr->srq_context; 720 srq->srq_type = srq_init_attr->srq_type; 721 722 if (ib_srq_has_cq(srq->srq_type)) { 723 srq->ext.cq = srq_init_attr->ext.cq; 724 atomic_inc(&srq->ext.cq->usecnt); 725 } 726 if (srq->srq_type == IB_SRQT_XRC) { 727 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd; 728 atomic_inc(&srq->ext.xrc.xrcd->usecnt); 729 } 730 atomic_inc(&pd->usecnt); 731 732 ret = pd->device->create_srq(srq, srq_init_attr, NULL); 733 if (ret) { 734 atomic_dec(&srq->pd->usecnt); 735 if (srq->srq_type == IB_SRQT_XRC) 736 atomic_dec(&srq->ext.xrc.xrcd->usecnt); 737 if (ib_srq_has_cq(srq->srq_type)) 738 atomic_dec(&srq->ext.cq->usecnt); 739 kfree(srq); 740 return ERR_PTR(ret); 741 } 742 743 return srq; 744} 745EXPORT_SYMBOL(ib_create_srq); 746 747int ib_modify_srq(struct ib_srq *srq, 748 struct ib_srq_attr *srq_attr, 749 enum ib_srq_attr_mask srq_attr_mask) 750{ 751 return srq->device->modify_srq ? 752 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) : 753 -ENOSYS; 754} 755EXPORT_SYMBOL(ib_modify_srq); 756 757int ib_query_srq(struct ib_srq *srq, 758 struct ib_srq_attr *srq_attr) 759{ 760 return srq->device->query_srq ? 761 srq->device->query_srq(srq, srq_attr) : -ENOSYS; 762} 763EXPORT_SYMBOL(ib_query_srq); 764 765int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata) 766{ 767 if (atomic_read(&srq->usecnt)) 768 return -EBUSY; 769 770 srq->device->destroy_srq(srq, udata); 771 772 atomic_dec(&srq->pd->usecnt); 773 if (srq->srq_type == IB_SRQT_XRC) 774 atomic_dec(&srq->ext.xrc.xrcd->usecnt); 775 if (ib_srq_has_cq(srq->srq_type)) 776 atomic_dec(&srq->ext.cq->usecnt); 777 kfree(srq); 778 779 return 0; 780} 781EXPORT_SYMBOL(ib_destroy_srq_user); 782 783/* Queue pairs */ 784 785static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) 786{ 787 struct ib_qp *qp = context; 788 unsigned long flags; 789 790 spin_lock_irqsave(&qp->device->event_handler_lock, flags); 791 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 792 if (event->element.qp->event_handler) 793 event->element.qp->event_handler(event, event->element.qp->qp_context); 794 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags); 795} 796 797static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) 798{ 799 mutex_lock(&xrcd->tgt_qp_mutex); 800 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list); 801 mutex_unlock(&xrcd->tgt_qp_mutex); 802} 803 804static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 805 void (*event_handler)(struct ib_event *, void *), 806 void *qp_context) 807{ 808 struct ib_qp *qp; 809 unsigned long flags; 810 811 qp = kzalloc(sizeof *qp, GFP_KERNEL); 812 if (!qp) 813 return ERR_PTR(-ENOMEM); 814 815 qp->real_qp = real_qp; 816 atomic_inc(&real_qp->usecnt); 817 qp->device = real_qp->device; 818 qp->event_handler = event_handler; 819 qp->qp_context = qp_context; 820 qp->qp_num = real_qp->qp_num; 821 qp->qp_type = real_qp->qp_type; 822 823 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 824 list_add(&qp->open_list, &real_qp->open_list); 825 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 826 827 return qp; 828} 829 830struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 831 struct ib_qp_open_attr *qp_open_attr) 832{ 833 struct ib_qp *qp, *real_qp; 834 835 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 836 return ERR_PTR(-EINVAL); 837 838 qp = ERR_PTR(-EINVAL); 839 mutex_lock(&xrcd->tgt_qp_mutex); 840 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) { 841 if (real_qp->qp_num == qp_open_attr->qp_num) { 842 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 843 qp_open_attr->qp_context); 844 break; 845 } 846 } 847 mutex_unlock(&xrcd->tgt_qp_mutex); 848 return qp; 849} 850EXPORT_SYMBOL(ib_open_qp); 851 852static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp, 853 struct ib_qp_init_attr *qp_init_attr) 854{ 855 struct ib_qp *real_qp = qp; 856 857 qp->event_handler = __ib_shared_qp_event_handler; 858 qp->qp_context = qp; 859 qp->pd = NULL; 860 qp->send_cq = qp->recv_cq = NULL; 861 qp->srq = NULL; 862 qp->xrcd = qp_init_attr->xrcd; 863 atomic_inc(&qp_init_attr->xrcd->usecnt); 864 INIT_LIST_HEAD(&qp->open_list); 865 866 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 867 qp_init_attr->qp_context); 868 if (!IS_ERR(qp)) 869 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); 870 else 871 real_qp->device->destroy_qp(real_qp, NULL); 872 return qp; 873} 874 875struct ib_qp *ib_create_qp(struct ib_pd *pd, 876 struct ib_qp_init_attr *qp_init_attr) 877{ 878 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device; 879 struct ib_qp *qp; 880 881 if (qp_init_attr->rwq_ind_tbl && 882 (qp_init_attr->recv_cq || 883 qp_init_attr->srq || qp_init_attr->cap.max_recv_wr || 884 qp_init_attr->cap.max_recv_sge)) 885 return ERR_PTR(-EINVAL); 886 887 qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL); 888 if (IS_ERR(qp)) 889 return qp; 890 891 qp->device = device; 892 qp->real_qp = qp; 893 qp->uobject = NULL; 894 qp->qp_type = qp_init_attr->qp_type; 895 qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl; 896 897 atomic_set(&qp->usecnt, 0); 898 spin_lock_init(&qp->mr_lock); 899 900 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) 901 return ib_create_xrc_qp(qp, qp_init_attr); 902 903 qp->event_handler = qp_init_attr->event_handler; 904 qp->qp_context = qp_init_attr->qp_context; 905 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { 906 qp->recv_cq = NULL; 907 qp->srq = NULL; 908 } else { 909 qp->recv_cq = qp_init_attr->recv_cq; 910 if (qp_init_attr->recv_cq) 911 atomic_inc(&qp_init_attr->recv_cq->usecnt); 912 qp->srq = qp_init_attr->srq; 913 if (qp->srq) 914 atomic_inc(&qp_init_attr->srq->usecnt); 915 } 916 917 qp->pd = pd; 918 qp->send_cq = qp_init_attr->send_cq; 919 qp->xrcd = NULL; 920 921 atomic_inc(&pd->usecnt); 922 if (qp_init_attr->send_cq) 923 atomic_inc(&qp_init_attr->send_cq->usecnt); 924 if (qp_init_attr->rwq_ind_tbl) 925 atomic_inc(&qp->rwq_ind_tbl->usecnt); 926 927 /* 928 * Note: all hw drivers guarantee that max_send_sge is lower than 929 * the device RDMA WRITE SGE limit but not all hw drivers ensure that 930 * max_send_sge <= max_sge_rd. 931 */ 932 qp->max_write_sge = qp_init_attr->cap.max_send_sge; 933 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge, 934 device->attrs.max_sge_rd); 935 936 return qp; 937} 938EXPORT_SYMBOL(ib_create_qp); 939 940static const struct { 941 int valid; 942 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 943 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 944} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 945 [IB_QPS_RESET] = { 946 [IB_QPS_RESET] = { .valid = 1 }, 947 [IB_QPS_INIT] = { 948 .valid = 1, 949 .req_param = { 950 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 951 IB_QP_PORT | 952 IB_QP_QKEY), 953 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 954 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 955 IB_QP_PORT | 956 IB_QP_ACCESS_FLAGS), 957 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 958 IB_QP_PORT | 959 IB_QP_ACCESS_FLAGS), 960 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 961 IB_QP_PORT | 962 IB_QP_ACCESS_FLAGS), 963 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 964 IB_QP_PORT | 965 IB_QP_ACCESS_FLAGS), 966 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 967 IB_QP_QKEY), 968 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 969 IB_QP_QKEY), 970 } 971 }, 972 }, 973 [IB_QPS_INIT] = { 974 [IB_QPS_RESET] = { .valid = 1 }, 975 [IB_QPS_ERR] = { .valid = 1 }, 976 [IB_QPS_INIT] = { 977 .valid = 1, 978 .opt_param = { 979 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 980 IB_QP_PORT | 981 IB_QP_QKEY), 982 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 983 IB_QP_PORT | 984 IB_QP_ACCESS_FLAGS), 985 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 986 IB_QP_PORT | 987 IB_QP_ACCESS_FLAGS), 988 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 989 IB_QP_PORT | 990 IB_QP_ACCESS_FLAGS), 991 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 992 IB_QP_PORT | 993 IB_QP_ACCESS_FLAGS), 994 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 995 IB_QP_QKEY), 996 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 997 IB_QP_QKEY), 998 } 999 }, 1000 [IB_QPS_RTR] = { 1001 .valid = 1, 1002 .req_param = { 1003 [IB_QPT_UC] = (IB_QP_AV | 1004 IB_QP_PATH_MTU | 1005 IB_QP_DEST_QPN | 1006 IB_QP_RQ_PSN), 1007 [IB_QPT_RC] = (IB_QP_AV | 1008 IB_QP_PATH_MTU | 1009 IB_QP_DEST_QPN | 1010 IB_QP_RQ_PSN | 1011 IB_QP_MAX_DEST_RD_ATOMIC | 1012 IB_QP_MIN_RNR_TIMER), 1013 [IB_QPT_XRC_INI] = (IB_QP_AV | 1014 IB_QP_PATH_MTU | 1015 IB_QP_DEST_QPN | 1016 IB_QP_RQ_PSN), 1017 [IB_QPT_XRC_TGT] = (IB_QP_AV | 1018 IB_QP_PATH_MTU | 1019 IB_QP_DEST_QPN | 1020 IB_QP_RQ_PSN | 1021 IB_QP_MAX_DEST_RD_ATOMIC | 1022 IB_QP_MIN_RNR_TIMER), 1023 }, 1024 .opt_param = { 1025 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1026 IB_QP_QKEY), 1027 [IB_QPT_UC] = (IB_QP_ALT_PATH | 1028 IB_QP_ACCESS_FLAGS | 1029 IB_QP_PKEY_INDEX), 1030 [IB_QPT_RC] = (IB_QP_ALT_PATH | 1031 IB_QP_ACCESS_FLAGS | 1032 IB_QP_PKEY_INDEX), 1033 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 1034 IB_QP_ACCESS_FLAGS | 1035 IB_QP_PKEY_INDEX), 1036 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 1037 IB_QP_ACCESS_FLAGS | 1038 IB_QP_PKEY_INDEX), 1039 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1040 IB_QP_QKEY), 1041 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1042 IB_QP_QKEY), 1043 }, 1044 }, 1045 }, 1046 [IB_QPS_RTR] = { 1047 [IB_QPS_RESET] = { .valid = 1 }, 1048 [IB_QPS_ERR] = { .valid = 1 }, 1049 [IB_QPS_RTS] = { 1050 .valid = 1, 1051 .req_param = { 1052 [IB_QPT_UD] = IB_QP_SQ_PSN, 1053 [IB_QPT_UC] = IB_QP_SQ_PSN, 1054 [IB_QPT_RC] = (IB_QP_TIMEOUT | 1055 IB_QP_RETRY_CNT | 1056 IB_QP_RNR_RETRY | 1057 IB_QP_SQ_PSN | 1058 IB_QP_MAX_QP_RD_ATOMIC), 1059 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 1060 IB_QP_RETRY_CNT | 1061 IB_QP_RNR_RETRY | 1062 IB_QP_SQ_PSN | 1063 IB_QP_MAX_QP_RD_ATOMIC), 1064 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 1065 IB_QP_SQ_PSN), 1066 [IB_QPT_SMI] = IB_QP_SQ_PSN, 1067 [IB_QPT_GSI] = IB_QP_SQ_PSN, 1068 }, 1069 .opt_param = { 1070 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1071 IB_QP_QKEY), 1072 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1073 IB_QP_ALT_PATH | 1074 IB_QP_ACCESS_FLAGS | 1075 IB_QP_PATH_MIG_STATE), 1076 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1077 IB_QP_ALT_PATH | 1078 IB_QP_ACCESS_FLAGS | 1079 IB_QP_MIN_RNR_TIMER | 1080 IB_QP_PATH_MIG_STATE), 1081 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1082 IB_QP_ALT_PATH | 1083 IB_QP_ACCESS_FLAGS | 1084 IB_QP_PATH_MIG_STATE), 1085 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1086 IB_QP_ALT_PATH | 1087 IB_QP_ACCESS_FLAGS | 1088 IB_QP_MIN_RNR_TIMER | 1089 IB_QP_PATH_MIG_STATE), 1090 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1091 IB_QP_QKEY), 1092 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1093 IB_QP_QKEY), 1094 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1095 } 1096 } 1097 }, 1098 [IB_QPS_RTS] = { 1099 [IB_QPS_RESET] = { .valid = 1 }, 1100 [IB_QPS_ERR] = { .valid = 1 }, 1101 [IB_QPS_RTS] = { 1102 .valid = 1, 1103 .opt_param = { 1104 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1105 IB_QP_QKEY), 1106 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1107 IB_QP_ACCESS_FLAGS | 1108 IB_QP_ALT_PATH | 1109 IB_QP_PATH_MIG_STATE), 1110 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1111 IB_QP_ACCESS_FLAGS | 1112 IB_QP_ALT_PATH | 1113 IB_QP_PATH_MIG_STATE | 1114 IB_QP_MIN_RNR_TIMER), 1115 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1116 IB_QP_ACCESS_FLAGS | 1117 IB_QP_ALT_PATH | 1118 IB_QP_PATH_MIG_STATE), 1119 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1120 IB_QP_ACCESS_FLAGS | 1121 IB_QP_ALT_PATH | 1122 IB_QP_PATH_MIG_STATE | 1123 IB_QP_MIN_RNR_TIMER), 1124 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1125 IB_QP_QKEY), 1126 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1127 IB_QP_QKEY), 1128 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1129 } 1130 }, 1131 [IB_QPS_SQD] = { 1132 .valid = 1, 1133 .opt_param = { 1134 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1135 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1136 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1137 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1138 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 1139 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1140 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 1141 } 1142 }, 1143 }, 1144 [IB_QPS_SQD] = { 1145 [IB_QPS_RESET] = { .valid = 1 }, 1146 [IB_QPS_ERR] = { .valid = 1 }, 1147 [IB_QPS_RTS] = { 1148 .valid = 1, 1149 .opt_param = { 1150 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1151 IB_QP_QKEY), 1152 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1153 IB_QP_ALT_PATH | 1154 IB_QP_ACCESS_FLAGS | 1155 IB_QP_PATH_MIG_STATE), 1156 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1157 IB_QP_ALT_PATH | 1158 IB_QP_ACCESS_FLAGS | 1159 IB_QP_MIN_RNR_TIMER | 1160 IB_QP_PATH_MIG_STATE), 1161 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1162 IB_QP_ALT_PATH | 1163 IB_QP_ACCESS_FLAGS | 1164 IB_QP_PATH_MIG_STATE), 1165 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1166 IB_QP_ALT_PATH | 1167 IB_QP_ACCESS_FLAGS | 1168 IB_QP_MIN_RNR_TIMER | 1169 IB_QP_PATH_MIG_STATE), 1170 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1171 IB_QP_QKEY), 1172 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1173 IB_QP_QKEY), 1174 } 1175 }, 1176 [IB_QPS_SQD] = { 1177 .valid = 1, 1178 .opt_param = { 1179 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1180 IB_QP_QKEY), 1181 [IB_QPT_UC] = (IB_QP_AV | 1182 IB_QP_ALT_PATH | 1183 IB_QP_ACCESS_FLAGS | 1184 IB_QP_PKEY_INDEX | 1185 IB_QP_PATH_MIG_STATE), 1186 [IB_QPT_RC] = (IB_QP_PORT | 1187 IB_QP_AV | 1188 IB_QP_TIMEOUT | 1189 IB_QP_RETRY_CNT | 1190 IB_QP_RNR_RETRY | 1191 IB_QP_MAX_QP_RD_ATOMIC | 1192 IB_QP_MAX_DEST_RD_ATOMIC | 1193 IB_QP_ALT_PATH | 1194 IB_QP_ACCESS_FLAGS | 1195 IB_QP_PKEY_INDEX | 1196 IB_QP_MIN_RNR_TIMER | 1197 IB_QP_PATH_MIG_STATE), 1198 [IB_QPT_XRC_INI] = (IB_QP_PORT | 1199 IB_QP_AV | 1200 IB_QP_TIMEOUT | 1201 IB_QP_RETRY_CNT | 1202 IB_QP_RNR_RETRY | 1203 IB_QP_MAX_QP_RD_ATOMIC | 1204 IB_QP_ALT_PATH | 1205 IB_QP_ACCESS_FLAGS | 1206 IB_QP_PKEY_INDEX | 1207 IB_QP_PATH_MIG_STATE), 1208 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 1209 IB_QP_AV | 1210 IB_QP_TIMEOUT | 1211 IB_QP_MAX_DEST_RD_ATOMIC | 1212 IB_QP_ALT_PATH | 1213 IB_QP_ACCESS_FLAGS | 1214 IB_QP_PKEY_INDEX | 1215 IB_QP_MIN_RNR_TIMER | 1216 IB_QP_PATH_MIG_STATE), 1217 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1218 IB_QP_QKEY), 1219 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1220 IB_QP_QKEY), 1221 } 1222 } 1223 }, 1224 [IB_QPS_SQE] = { 1225 [IB_QPS_RESET] = { .valid = 1 }, 1226 [IB_QPS_ERR] = { .valid = 1 }, 1227 [IB_QPS_RTS] = { 1228 .valid = 1, 1229 .opt_param = { 1230 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1231 IB_QP_QKEY), 1232 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1233 IB_QP_ACCESS_FLAGS), 1234 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1235 IB_QP_QKEY), 1236 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1237 IB_QP_QKEY), 1238 } 1239 } 1240 }, 1241 [IB_QPS_ERR] = { 1242 [IB_QPS_RESET] = { .valid = 1 }, 1243 [IB_QPS_ERR] = { .valid = 1 } 1244 } 1245}; 1246 1247bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 1248 enum ib_qp_type type, enum ib_qp_attr_mask mask) 1249{ 1250 enum ib_qp_attr_mask req_param, opt_param; 1251 1252 if (mask & IB_QP_CUR_STATE && 1253 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 1254 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 1255 return false; 1256 1257 if (!qp_state_table[cur_state][next_state].valid) 1258 return false; 1259 1260 req_param = qp_state_table[cur_state][next_state].req_param[type]; 1261 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 1262 1263 if ((mask & req_param) != req_param) 1264 return false; 1265 1266 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 1267 return false; 1268 1269 return true; 1270} 1271EXPORT_SYMBOL(ib_modify_qp_is_ok); 1272 1273int ib_resolve_eth_dmac(struct ib_device *device, 1274 struct ib_ah_attr *ah_attr) 1275{ 1276 struct ib_gid_attr sgid_attr; 1277 union ib_gid sgid; 1278 int hop_limit; 1279 int ret; 1280 1281 if (ah_attr->port_num < rdma_start_port(device) || 1282 ah_attr->port_num > rdma_end_port(device)) 1283 return -EINVAL; 1284 1285 if (!rdma_cap_eth_ah(device, ah_attr->port_num)) 1286 return 0; 1287 1288 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1289 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1290 __be32 addr = 0; 1291 1292 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4); 1293 ip_eth_mc_map(addr, (char *)ah_attr->dmac); 1294 } else { 1295 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw, 1296 (char *)ah_attr->dmac); 1297 } 1298 return 0; 1299 } 1300 1301 ret = ib_query_gid(device, 1302 ah_attr->port_num, 1303 ah_attr->grh.sgid_index, 1304 &sgid, &sgid_attr); 1305 if (ret != 0) 1306 return (ret); 1307 if (!sgid_attr.ndev) 1308 return -ENXIO; 1309 1310 ret = rdma_addr_find_l2_eth_by_grh(&sgid, 1311 &ah_attr->grh.dgid, 1312 ah_attr->dmac, 1313 sgid_attr.ndev, &hop_limit); 1314 dev_put(sgid_attr.ndev); 1315 1316 ah_attr->grh.hop_limit = hop_limit; 1317 return ret; 1318} 1319EXPORT_SYMBOL(ib_resolve_eth_dmac); 1320 1321static bool is_qp_type_connected(const struct ib_qp *qp) 1322{ 1323 return (qp->qp_type == IB_QPT_UC || 1324 qp->qp_type == IB_QPT_RC || 1325 qp->qp_type == IB_QPT_XRC_INI || 1326 qp->qp_type == IB_QPT_XRC_TGT); 1327} 1328 1329/** 1330 * IB core internal function to perform QP attributes modification. 1331 */ 1332static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, 1333 int attr_mask, struct ib_udata *udata) 1334{ 1335 u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1336 int ret; 1337 1338 if (port < rdma_start_port(qp->device) || 1339 port > rdma_end_port(qp->device)) 1340 return -EINVAL; 1341 1342 if (attr_mask & IB_QP_ALT_PATH) { 1343 /* 1344 * Today the core code can only handle alternate paths and APM 1345 * for IB. Ban them in roce mode. 1346 */ 1347 if (!(rdma_protocol_ib(qp->device, 1348 attr->alt_ah_attr.port_num) && 1349 rdma_protocol_ib(qp->device, port))) { 1350 ret = EINVAL; 1351 goto out; 1352 } 1353 } 1354 1355 /* 1356 * If the user provided the qp_attr then we have to resolve it. Kernel 1357 * users have to provide already resolved rdma_ah_attr's 1358 */ 1359 if (udata && (attr_mask & IB_QP_AV) && 1360 rdma_protocol_roce(qp->device, port) && 1361 is_qp_type_connected(qp)) { 1362 ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr); 1363 if (ret) 1364 goto out; 1365 } 1366 1367 if (rdma_ib_or_roce(qp->device, port)) { 1368 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) { 1369 dev_warn(&qp->device->dev, 1370 "%s rq_psn overflow, masking to 24 bits\n", 1371 __func__); 1372 attr->rq_psn &= 0xffffff; 1373 } 1374 1375 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) { 1376 dev_warn(&qp->device->dev, 1377 " %s sq_psn overflow, masking to 24 bits\n", 1378 __func__); 1379 attr->sq_psn &= 0xffffff; 1380 } 1381 } 1382 1383 ret = qp->device->modify_qp(qp, attr, attr_mask, udata); 1384 if (ret) 1385 goto out; 1386 1387 if (attr_mask & IB_QP_PORT) 1388 qp->port = attr->port_num; 1389out: 1390 return ret; 1391} 1392 1393/** 1394 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 1395 * @ib_qp: The QP to modify. 1396 * @attr: On input, specifies the QP attributes to modify. On output, 1397 * the current values of selected QP attributes are returned. 1398 * @attr_mask: A bit-mask used to specify which attributes of the QP 1399 * are being modified. 1400 * @udata: pointer to user's input output buffer information 1401 * are being modified. 1402 * It returns 0 on success and returns appropriate error code on error. 1403 */ 1404int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr, 1405 int attr_mask, struct ib_udata *udata) 1406{ 1407 return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata); 1408} 1409EXPORT_SYMBOL(ib_modify_qp_with_udata); 1410 1411int ib_modify_qp(struct ib_qp *qp, 1412 struct ib_qp_attr *qp_attr, 1413 int qp_attr_mask) 1414{ 1415 if (qp_attr_mask & IB_QP_AV) { 1416 int ret; 1417 1418 ret = ib_resolve_eth_dmac(qp->device, &qp_attr->ah_attr); 1419 if (ret) 1420 return ret; 1421 } 1422 1423 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL); 1424} 1425EXPORT_SYMBOL(ib_modify_qp); 1426 1427int ib_query_qp(struct ib_qp *qp, 1428 struct ib_qp_attr *qp_attr, 1429 int qp_attr_mask, 1430 struct ib_qp_init_attr *qp_init_attr) 1431{ 1432 return qp->device->query_qp ? 1433 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) : 1434 -ENOSYS; 1435} 1436EXPORT_SYMBOL(ib_query_qp); 1437 1438int ib_close_qp(struct ib_qp *qp) 1439{ 1440 struct ib_qp *real_qp; 1441 unsigned long flags; 1442 1443 real_qp = qp->real_qp; 1444 if (real_qp == qp) 1445 return -EINVAL; 1446 1447 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 1448 list_del(&qp->open_list); 1449 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 1450 1451 atomic_dec(&real_qp->usecnt); 1452 kfree(qp); 1453 1454 return 0; 1455} 1456EXPORT_SYMBOL(ib_close_qp); 1457 1458static int __ib_destroy_shared_qp(struct ib_qp *qp) 1459{ 1460 struct ib_xrcd *xrcd; 1461 struct ib_qp *real_qp; 1462 int ret; 1463 1464 real_qp = qp->real_qp; 1465 xrcd = real_qp->xrcd; 1466 1467 mutex_lock(&xrcd->tgt_qp_mutex); 1468 ib_close_qp(qp); 1469 if (atomic_read(&real_qp->usecnt) == 0) 1470 list_del(&real_qp->xrcd_list); 1471 else 1472 real_qp = NULL; 1473 mutex_unlock(&xrcd->tgt_qp_mutex); 1474 1475 if (real_qp) { 1476 ret = ib_destroy_qp(real_qp); 1477 if (!ret) 1478 atomic_dec(&xrcd->usecnt); 1479 else 1480 __ib_insert_xrcd_qp(xrcd, real_qp); 1481 } 1482 1483 return 0; 1484} 1485 1486int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata) 1487{ 1488 struct ib_pd *pd; 1489 struct ib_cq *scq, *rcq; 1490 struct ib_srq *srq; 1491 struct ib_rwq_ind_table *ind_tbl; 1492 int ret; 1493 1494 if (atomic_read(&qp->usecnt)) 1495 return -EBUSY; 1496 1497 if (qp->real_qp != qp) 1498 return __ib_destroy_shared_qp(qp); 1499 1500 pd = qp->pd; 1501 scq = qp->send_cq; 1502 rcq = qp->recv_cq; 1503 srq = qp->srq; 1504 ind_tbl = qp->rwq_ind_tbl; 1505 1506 ret = qp->device->destroy_qp(qp, udata); 1507 if (!ret) { 1508 if (pd) 1509 atomic_dec(&pd->usecnt); 1510 if (scq) 1511 atomic_dec(&scq->usecnt); 1512 if (rcq) 1513 atomic_dec(&rcq->usecnt); 1514 if (srq) 1515 atomic_dec(&srq->usecnt); 1516 if (ind_tbl) 1517 atomic_dec(&ind_tbl->usecnt); 1518 } 1519 1520 return ret; 1521} 1522EXPORT_SYMBOL(ib_destroy_qp_user); 1523 1524/* Completion queues */ 1525 1526struct ib_cq *__ib_create_cq(struct ib_device *device, 1527 ib_comp_handler comp_handler, 1528 void (*event_handler)(struct ib_event *, void *), 1529 void *cq_context, 1530 const struct ib_cq_init_attr *cq_attr, 1531 const char *caller) 1532{ 1533 struct ib_cq *cq; 1534 int ret; 1535 1536 cq = rdma_zalloc_drv_obj(device, ib_cq); 1537 if (!cq) 1538 return ERR_PTR(-ENOMEM); 1539 1540 cq->device = device; 1541 cq->uobject = NULL; 1542 cq->comp_handler = comp_handler; 1543 cq->event_handler = event_handler; 1544 cq->cq_context = cq_context; 1545 atomic_set(&cq->usecnt, 0); 1546 1547 ret = device->create_cq(cq, cq_attr, NULL); 1548 if (ret) { 1549 kfree(cq); 1550 return ERR_PTR(ret); 1551 } 1552 1553 return cq; 1554} 1555EXPORT_SYMBOL(__ib_create_cq); 1556 1557int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 1558{ 1559 return cq->device->modify_cq ? 1560 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS; 1561} 1562EXPORT_SYMBOL(ib_modify_cq); 1563 1564int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata) 1565{ 1566 if (atomic_read(&cq->usecnt)) 1567 return -EBUSY; 1568 1569 cq->device->destroy_cq(cq, udata); 1570 kfree(cq); 1571 return 0; 1572} 1573EXPORT_SYMBOL(ib_destroy_cq_user); 1574 1575int ib_resize_cq(struct ib_cq *cq, int cqe) 1576{ 1577 return cq->device->resize_cq ? 1578 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; 1579} 1580EXPORT_SYMBOL(ib_resize_cq); 1581 1582/* Memory regions */ 1583 1584int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata) 1585{ 1586 struct ib_pd *pd = mr->pd; 1587 struct ib_dm *dm = mr->dm; 1588 struct ib_sig_attrs *sig_attrs = mr->sig_attrs; 1589 int ret; 1590 1591 ret = mr->device->dereg_mr(mr, udata); 1592 if (!ret) { 1593 atomic_dec(&pd->usecnt); 1594 if (dm) 1595 atomic_dec(&dm->usecnt); 1596 kfree(sig_attrs); 1597 } 1598 1599 return ret; 1600} 1601EXPORT_SYMBOL(ib_dereg_mr_user); 1602 1603/** 1604 * ib_alloc_mr_user() - Allocates a memory region 1605 * @pd: protection domain associated with the region 1606 * @mr_type: memory region type 1607 * @max_num_sg: maximum sg entries available for registration. 1608 * @udata: user data or null for kernel objects 1609 * 1610 * Notes: 1611 * Memory registeration page/sg lists must not exceed max_num_sg. 1612 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed 1613 * max_num_sg * used_page_size. 1614 * 1615 */ 1616struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type, 1617 u32 max_num_sg, struct ib_udata *udata) 1618{ 1619 struct ib_mr *mr; 1620 1621 if (!pd->device->alloc_mr) { 1622 mr = ERR_PTR(-EOPNOTSUPP); 1623 goto out; 1624 } 1625 1626 if (mr_type == IB_MR_TYPE_INTEGRITY) { 1627 WARN_ON_ONCE(1); 1628 mr = ERR_PTR(-EINVAL); 1629 goto out; 1630 } 1631 1632 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg, udata); 1633 if (!IS_ERR(mr)) { 1634 mr->device = pd->device; 1635 mr->pd = pd; 1636 mr->dm = NULL; 1637 mr->uobject = NULL; 1638 atomic_inc(&pd->usecnt); 1639 mr->need_inval = false; 1640 mr->type = mr_type; 1641 mr->sig_attrs = NULL; 1642 } 1643 1644out: 1645 return mr; 1646} 1647EXPORT_SYMBOL(ib_alloc_mr_user); 1648 1649/* "Fast" memory regions */ 1650 1651struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 1652 int mr_access_flags, 1653 struct ib_fmr_attr *fmr_attr) 1654{ 1655 struct ib_fmr *fmr; 1656 1657 if (!pd->device->alloc_fmr) 1658 return ERR_PTR(-ENOSYS); 1659 1660 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 1661 if (!IS_ERR(fmr)) { 1662 fmr->device = pd->device; 1663 fmr->pd = pd; 1664 atomic_inc(&pd->usecnt); 1665 } 1666 1667 return fmr; 1668} 1669EXPORT_SYMBOL(ib_alloc_fmr); 1670 1671int ib_unmap_fmr(struct list_head *fmr_list) 1672{ 1673 struct ib_fmr *fmr; 1674 1675 if (list_empty(fmr_list)) 1676 return 0; 1677 1678 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 1679 return fmr->device->unmap_fmr(fmr_list); 1680} 1681EXPORT_SYMBOL(ib_unmap_fmr); 1682 1683int ib_dealloc_fmr(struct ib_fmr *fmr) 1684{ 1685 struct ib_pd *pd; 1686 int ret; 1687 1688 pd = fmr->pd; 1689 ret = fmr->device->dealloc_fmr(fmr); 1690 if (!ret) 1691 atomic_dec(&pd->usecnt); 1692 1693 return ret; 1694} 1695EXPORT_SYMBOL(ib_dealloc_fmr); 1696 1697/* Multicast groups */ 1698 1699static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid) 1700{ 1701 struct ib_qp_init_attr init_attr = {}; 1702 struct ib_qp_attr attr = {}; 1703 int num_eth_ports = 0; 1704 int port; 1705 1706 /* If QP state >= init, it is assigned to a port and we can check this 1707 * port only. 1708 */ 1709 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) { 1710 if (attr.qp_state >= IB_QPS_INIT) { 1711 if (rdma_port_get_link_layer(qp->device, attr.port_num) != 1712 IB_LINK_LAYER_INFINIBAND) 1713 return true; 1714 goto lid_check; 1715 } 1716 } 1717 1718 /* Can't get a quick answer, iterate over all ports */ 1719 for (port = 0; port < qp->device->phys_port_cnt; port++) 1720 if (rdma_port_get_link_layer(qp->device, port) != 1721 IB_LINK_LAYER_INFINIBAND) 1722 num_eth_ports++; 1723 1724 /* If we have at lease one Ethernet port, RoCE annex declares that 1725 * multicast LID should be ignored. We can't tell at this step if the 1726 * QP belongs to an IB or Ethernet port. 1727 */ 1728 if (num_eth_ports) 1729 return true; 1730 1731 /* If all the ports are IB, we can check according to IB spec. */ 1732lid_check: 1733 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || 1734 lid == be16_to_cpu(IB_LID_PERMISSIVE)); 1735} 1736 1737int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1738{ 1739 int ret; 1740 1741 if (!qp->device->attach_mcast) 1742 return -ENOSYS; 1743 1744 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 1745 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 1746 return -EINVAL; 1747 1748 ret = qp->device->attach_mcast(qp, gid, lid); 1749 if (!ret) 1750 atomic_inc(&qp->usecnt); 1751 return ret; 1752} 1753EXPORT_SYMBOL(ib_attach_mcast); 1754 1755int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1756{ 1757 int ret; 1758 1759 if (!qp->device->detach_mcast) 1760 return -ENOSYS; 1761 1762 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 1763 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 1764 return -EINVAL; 1765 1766 ret = qp->device->detach_mcast(qp, gid, lid); 1767 if (!ret) 1768 atomic_dec(&qp->usecnt); 1769 return ret; 1770} 1771EXPORT_SYMBOL(ib_detach_mcast); 1772 1773struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller) 1774{ 1775 struct ib_xrcd *xrcd; 1776 1777 if (!device->alloc_xrcd) 1778 return ERR_PTR(-EOPNOTSUPP); 1779 1780 xrcd = device->alloc_xrcd(device, NULL); 1781 if (!IS_ERR(xrcd)) { 1782 xrcd->device = device; 1783 xrcd->inode = NULL; 1784 atomic_set(&xrcd->usecnt, 0); 1785 mutex_init(&xrcd->tgt_qp_mutex); 1786 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 1787 } 1788 1789 return xrcd; 1790} 1791EXPORT_SYMBOL(__ib_alloc_xrcd); 1792 1793int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata) 1794{ 1795 struct ib_qp *qp; 1796 int ret; 1797 1798 if (atomic_read(&xrcd->usecnt)) 1799 return -EBUSY; 1800 1801 while (!list_empty(&xrcd->tgt_qp_list)) { 1802 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list); 1803 ret = ib_destroy_qp(qp); 1804 if (ret) 1805 return ret; 1806 } 1807 mutex_destroy(&xrcd->tgt_qp_mutex); 1808 1809 return xrcd->device->dealloc_xrcd(xrcd, udata); 1810} 1811EXPORT_SYMBOL(ib_dealloc_xrcd); 1812 1813/** 1814 * ib_create_wq - Creates a WQ associated with the specified protection 1815 * domain. 1816 * @pd: The protection domain associated with the WQ. 1817 * @wq_init_attr: A list of initial attributes required to create the 1818 * WQ. If WQ creation succeeds, then the attributes are updated to 1819 * the actual capabilities of the created WQ. 1820 * 1821 * wq_init_attr->max_wr and wq_init_attr->max_sge determine 1822 * the requested size of the WQ, and set to the actual values allocated 1823 * on return. 1824 * If ib_create_wq() succeeds, then max_wr and max_sge will always be 1825 * at least as large as the requested values. 1826 */ 1827struct ib_wq *ib_create_wq(struct ib_pd *pd, 1828 struct ib_wq_init_attr *wq_attr) 1829{ 1830 struct ib_wq *wq; 1831 1832 if (!pd->device->create_wq) 1833 return ERR_PTR(-ENOSYS); 1834 1835 wq = pd->device->create_wq(pd, wq_attr, NULL); 1836 if (!IS_ERR(wq)) { 1837 wq->event_handler = wq_attr->event_handler; 1838 wq->wq_context = wq_attr->wq_context; 1839 wq->wq_type = wq_attr->wq_type; 1840 wq->cq = wq_attr->cq; 1841 wq->device = pd->device; 1842 wq->pd = pd; 1843 wq->uobject = NULL; 1844 atomic_inc(&pd->usecnt); 1845 atomic_inc(&wq_attr->cq->usecnt); 1846 atomic_set(&wq->usecnt, 0); 1847 } 1848 return wq; 1849} 1850EXPORT_SYMBOL(ib_create_wq); 1851 1852/** 1853 * ib_destroy_wq - Destroys the specified user WQ. 1854 * @wq: The WQ to destroy. 1855 * @udata: Valid user data 1856 */ 1857int ib_destroy_wq(struct ib_wq *wq, struct ib_udata *udata) 1858{ 1859 struct ib_cq *cq = wq->cq; 1860 struct ib_pd *pd = wq->pd; 1861 1862 if (atomic_read(&wq->usecnt)) 1863 return -EBUSY; 1864 1865 wq->device->destroy_wq(wq, udata); 1866 atomic_dec(&pd->usecnt); 1867 atomic_dec(&cq->usecnt); 1868 1869 return 0; 1870} 1871EXPORT_SYMBOL(ib_destroy_wq); 1872 1873/** 1874 * ib_modify_wq - Modifies the specified WQ. 1875 * @wq: The WQ to modify. 1876 * @wq_attr: On input, specifies the WQ attributes to modify. 1877 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ 1878 * are being modified. 1879 * On output, the current values of selected WQ attributes are returned. 1880 */ 1881int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr, 1882 u32 wq_attr_mask) 1883{ 1884 int err; 1885 1886 if (!wq->device->modify_wq) 1887 return -ENOSYS; 1888 1889 err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL); 1890 return err; 1891} 1892EXPORT_SYMBOL(ib_modify_wq); 1893 1894/* 1895 * ib_create_rwq_ind_table - Creates a RQ Indirection Table. 1896 * @device: The device on which to create the rwq indirection table. 1897 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to 1898 * create the Indirection Table. 1899 * 1900 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less 1901 * than the created ib_rwq_ind_table object and the caller is responsible 1902 * for its memory allocation/free. 1903 */ 1904struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device, 1905 struct ib_rwq_ind_table_init_attr *init_attr) 1906{ 1907 struct ib_rwq_ind_table *rwq_ind_table; 1908 int i; 1909 u32 table_size; 1910 1911 if (!device->create_rwq_ind_table) 1912 return ERR_PTR(-ENOSYS); 1913 1914 table_size = (1 << init_attr->log_ind_tbl_size); 1915 rwq_ind_table = device->create_rwq_ind_table(device, 1916 init_attr, NULL); 1917 if (IS_ERR(rwq_ind_table)) 1918 return rwq_ind_table; 1919 1920 rwq_ind_table->ind_tbl = init_attr->ind_tbl; 1921 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size; 1922 rwq_ind_table->device = device; 1923 rwq_ind_table->uobject = NULL; 1924 atomic_set(&rwq_ind_table->usecnt, 0); 1925 1926 for (i = 0; i < table_size; i++) 1927 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt); 1928 1929 return rwq_ind_table; 1930} 1931EXPORT_SYMBOL(ib_create_rwq_ind_table); 1932 1933/* 1934 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table. 1935 * @wq_ind_table: The Indirection Table to destroy. 1936*/ 1937int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table) 1938{ 1939 int err, i; 1940 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size); 1941 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl; 1942 1943 if (atomic_read(&rwq_ind_table->usecnt)) 1944 return -EBUSY; 1945 1946 err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table); 1947 if (!err) { 1948 for (i = 0; i < table_size; i++) 1949 atomic_dec(&ind_tbl[i]->usecnt); 1950 } 1951 1952 return err; 1953} 1954EXPORT_SYMBOL(ib_destroy_rwq_ind_table); 1955 1956int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 1957 struct ib_mr_status *mr_status) 1958{ 1959 return mr->device->check_mr_status ? 1960 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS; 1961} 1962EXPORT_SYMBOL(ib_check_mr_status); 1963 1964int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port, 1965 int state) 1966{ 1967 if (!device->set_vf_link_state) 1968 return -ENOSYS; 1969 1970 return device->set_vf_link_state(device, vf, port, state); 1971} 1972EXPORT_SYMBOL(ib_set_vf_link_state); 1973 1974int ib_get_vf_config(struct ib_device *device, int vf, u8 port, 1975 struct ifla_vf_info *info) 1976{ 1977 if (!device->get_vf_config) 1978 return -ENOSYS; 1979 1980 return device->get_vf_config(device, vf, port, info); 1981} 1982EXPORT_SYMBOL(ib_get_vf_config); 1983 1984int ib_get_vf_stats(struct ib_device *device, int vf, u8 port, 1985 struct ifla_vf_stats *stats) 1986{ 1987 if (!device->get_vf_stats) 1988 return -ENOSYS; 1989 1990 return device->get_vf_stats(device, vf, port, stats); 1991} 1992EXPORT_SYMBOL(ib_get_vf_stats); 1993 1994int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid, 1995 int type) 1996{ 1997 if (!device->set_vf_guid) 1998 return -ENOSYS; 1999 2000 return device->set_vf_guid(device, vf, port, guid, type); 2001} 2002EXPORT_SYMBOL(ib_set_vf_guid); 2003 2004/** 2005 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list 2006 * and set it the memory region. 2007 * @mr: memory region 2008 * @sg: dma mapped scatterlist 2009 * @sg_nents: number of entries in sg 2010 * @sg_offset: offset in bytes into sg 2011 * @page_size: page vector desired page size 2012 * 2013 * Constraints: 2014 * - The first sg element is allowed to have an offset. 2015 * - Each sg element must either be aligned to page_size or virtually 2016 * contiguous to the previous element. In case an sg element has a 2017 * non-contiguous offset, the mapping prefix will not include it. 2018 * - The last sg element is allowed to have length less than page_size. 2019 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size 2020 * then only max_num_sg entries will be mapped. 2021 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these 2022 * constraints holds and the page_size argument is ignored. 2023 * 2024 * Returns the number of sg elements that were mapped to the memory region. 2025 * 2026 * After this completes successfully, the memory region 2027 * is ready for registration. 2028 */ 2029int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 2030 unsigned int *sg_offset, unsigned int page_size) 2031{ 2032 if (unlikely(!mr->device->map_mr_sg)) 2033 return -ENOSYS; 2034 2035 mr->page_size = page_size; 2036 2037 return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset); 2038} 2039EXPORT_SYMBOL(ib_map_mr_sg); 2040 2041/** 2042 * ib_sg_to_pages() - Convert the largest prefix of a sg list 2043 * to a page vector 2044 * @mr: memory region 2045 * @sgl: dma mapped scatterlist 2046 * @sg_nents: number of entries in sg 2047 * @sg_offset_p: IN: start offset in bytes into sg 2048 * OUT: offset in bytes for element n of the sg of the first 2049 * byte that has not been processed where n is the return 2050 * value of this function. 2051 * @set_page: driver page assignment function pointer 2052 * 2053 * Core service helper for drivers to convert the largest 2054 * prefix of given sg list to a page vector. The sg list 2055 * prefix converted is the prefix that meet the requirements 2056 * of ib_map_mr_sg. 2057 * 2058 * Returns the number of sg elements that were assigned to 2059 * a page vector. 2060 */ 2061int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 2062 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64)) 2063{ 2064 struct scatterlist *sg; 2065 u64 last_end_dma_addr = 0; 2066 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0; 2067 unsigned int last_page_off = 0; 2068 u64 page_mask = ~((u64)mr->page_size - 1); 2069 int i, ret; 2070 2071 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0]))) 2072 return -EINVAL; 2073 2074 mr->iova = sg_dma_address(&sgl[0]) + sg_offset; 2075 mr->length = 0; 2076 2077 for_each_sg(sgl, sg, sg_nents, i) { 2078 u64 dma_addr = sg_dma_address(sg) + sg_offset; 2079 u64 prev_addr = dma_addr; 2080 unsigned int dma_len = sg_dma_len(sg) - sg_offset; 2081 u64 end_dma_addr = dma_addr + dma_len; 2082 u64 page_addr = dma_addr & page_mask; 2083 2084 /* 2085 * For the second and later elements, check whether either the 2086 * end of element i-1 or the start of element i is not aligned 2087 * on a page boundary. 2088 */ 2089 if (i && (last_page_off != 0 || page_addr != dma_addr)) { 2090 /* Stop mapping if there is a gap. */ 2091 if (last_end_dma_addr != dma_addr) 2092 break; 2093 2094 /* 2095 * Coalesce this element with the last. If it is small 2096 * enough just update mr->length. Otherwise start 2097 * mapping from the next page. 2098 */ 2099 goto next_page; 2100 } 2101 2102 do { 2103 ret = set_page(mr, page_addr); 2104 if (unlikely(ret < 0)) { 2105 sg_offset = prev_addr - sg_dma_address(sg); 2106 mr->length += prev_addr - dma_addr; 2107 if (sg_offset_p) 2108 *sg_offset_p = sg_offset; 2109 return i || sg_offset ? i : ret; 2110 } 2111 prev_addr = page_addr; 2112next_page: 2113 page_addr += mr->page_size; 2114 } while (page_addr < end_dma_addr); 2115 2116 mr->length += dma_len; 2117 last_end_dma_addr = end_dma_addr; 2118 last_page_off = end_dma_addr & ~page_mask; 2119 2120 sg_offset = 0; 2121 } 2122 2123 if (sg_offset_p) 2124 *sg_offset_p = 0; 2125 return i; 2126} 2127EXPORT_SYMBOL(ib_sg_to_pages); 2128 2129struct ib_drain_cqe { 2130 struct ib_cqe cqe; 2131 struct completion done; 2132}; 2133 2134static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc) 2135{ 2136 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe, 2137 cqe); 2138 2139 complete(&cqe->done); 2140} 2141 2142/* 2143 * Post a WR and block until its completion is reaped for the SQ. 2144 */ 2145static void __ib_drain_sq(struct ib_qp *qp) 2146{ 2147 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2148 struct ib_drain_cqe sdrain; 2149 const struct ib_send_wr *bad_swr; 2150 struct ib_rdma_wr swr = { 2151 .wr = { 2152 .opcode = IB_WR_RDMA_WRITE, 2153 .wr_cqe = &sdrain.cqe, 2154 }, 2155 }; 2156 int ret; 2157 2158 if (qp->send_cq->poll_ctx == IB_POLL_DIRECT) { 2159 WARN_ONCE(qp->send_cq->poll_ctx == IB_POLL_DIRECT, 2160 "IB_POLL_DIRECT poll_ctx not supported for drain\n"); 2161 return; 2162 } 2163 2164 sdrain.cqe.done = ib_drain_qp_done; 2165 init_completion(&sdrain.done); 2166 2167 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2168 if (ret) { 2169 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2170 return; 2171 } 2172 2173 ret = ib_post_send(qp, &swr.wr, &bad_swr); 2174 if (ret) { 2175 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2176 return; 2177 } 2178 2179 wait_for_completion(&sdrain.done); 2180} 2181 2182/* 2183 * Post a WR and block until its completion is reaped for the RQ. 2184 */ 2185static void __ib_drain_rq(struct ib_qp *qp) 2186{ 2187 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2188 struct ib_drain_cqe rdrain; 2189 struct ib_recv_wr rwr = {}; 2190 const struct ib_recv_wr *bad_rwr; 2191 int ret; 2192 2193 if (qp->recv_cq->poll_ctx == IB_POLL_DIRECT) { 2194 WARN_ONCE(qp->recv_cq->poll_ctx == IB_POLL_DIRECT, 2195 "IB_POLL_DIRECT poll_ctx not supported for drain\n"); 2196 return; 2197 } 2198 2199 rwr.wr_cqe = &rdrain.cqe; 2200 rdrain.cqe.done = ib_drain_qp_done; 2201 init_completion(&rdrain.done); 2202 2203 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2204 if (ret) { 2205 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2206 return; 2207 } 2208 2209 ret = ib_post_recv(qp, &rwr, &bad_rwr); 2210 if (ret) { 2211 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2212 return; 2213 } 2214 2215 wait_for_completion(&rdrain.done); 2216} 2217 2218/** 2219 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the 2220 * application. 2221 * @qp: queue pair to drain 2222 * 2223 * If the device has a provider-specific drain function, then 2224 * call that. Otherwise call the generic drain function 2225 * __ib_drain_sq(). 2226 * 2227 * The caller must: 2228 * 2229 * ensure there is room in the CQ and SQ for the drain work request and 2230 * completion. 2231 * 2232 * allocate the CQ using ib_alloc_cq() and the CQ poll context cannot be 2233 * IB_POLL_DIRECT. 2234 * 2235 * ensure that there are no other contexts that are posting WRs concurrently. 2236 * Otherwise the drain is not guaranteed. 2237 */ 2238void ib_drain_sq(struct ib_qp *qp) 2239{ 2240 if (qp->device->drain_sq) 2241 qp->device->drain_sq(qp); 2242 else 2243 __ib_drain_sq(qp); 2244} 2245EXPORT_SYMBOL(ib_drain_sq); 2246 2247/** 2248 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the 2249 * application. 2250 * @qp: queue pair to drain 2251 * 2252 * If the device has a provider-specific drain function, then 2253 * call that. Otherwise call the generic drain function 2254 * __ib_drain_rq(). 2255 * 2256 * The caller must: 2257 * 2258 * ensure there is room in the CQ and RQ for the drain work request and 2259 * completion. 2260 * 2261 * allocate the CQ using ib_alloc_cq() and the CQ poll context cannot be 2262 * IB_POLL_DIRECT. 2263 * 2264 * ensure that there are no other contexts that are posting WRs concurrently. 2265 * Otherwise the drain is not guaranteed. 2266 */ 2267void ib_drain_rq(struct ib_qp *qp) 2268{ 2269 if (qp->device->drain_rq) 2270 qp->device->drain_rq(qp); 2271 else 2272 __ib_drain_rq(qp); 2273} 2274EXPORT_SYMBOL(ib_drain_rq); 2275 2276/** 2277 * ib_drain_qp() - Block until all CQEs have been consumed by the 2278 * application on both the RQ and SQ. 2279 * @qp: queue pair to drain 2280 * 2281 * The caller must: 2282 * 2283 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests 2284 * and completions. 2285 * 2286 * allocate the CQs using ib_alloc_cq() and the CQ poll context cannot be 2287 * IB_POLL_DIRECT. 2288 * 2289 * ensure that there are no other contexts that are posting WRs concurrently. 2290 * Otherwise the drain is not guaranteed. 2291 */ 2292void ib_drain_qp(struct ib_qp *qp) 2293{ 2294 ib_drain_sq(qp); 2295 if (!qp->srq) 2296 ib_drain_rq(qp); 2297} 2298EXPORT_SYMBOL(ib_drain_qp); 2299