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 54 #include "core_priv.h" 55 56 static const char * const ib_events[] = { 57 [IB_EVENT_CQ_ERR] = "CQ error", 58 [IB_EVENT_QP_FATAL] = "QP fatal error", 59 [IB_EVENT_QP_REQ_ERR] = "QP request error", 60 [IB_EVENT_QP_ACCESS_ERR] = "QP access error", 61 [IB_EVENT_COMM_EST] = "communication established", 62 [IB_EVENT_SQ_DRAINED] = "send queue drained", 63 [IB_EVENT_PATH_MIG] = "path migration successful", 64 [IB_EVENT_PATH_MIG_ERR] = "path migration error", 65 [IB_EVENT_DEVICE_FATAL] = "device fatal error", 66 [IB_EVENT_PORT_ACTIVE] = "port active", 67 [IB_EVENT_PORT_ERR] = "port error", 68 [IB_EVENT_LID_CHANGE] = "LID change", 69 [IB_EVENT_PKEY_CHANGE] = "P_key change", 70 [IB_EVENT_SM_CHANGE] = "SM change", 71 [IB_EVENT_SRQ_ERR] = "SRQ error", 72 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached", 73 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached", 74 [IB_EVENT_CLIENT_REREGISTER] = "client reregister", 75 [IB_EVENT_GID_CHANGE] = "GID changed", 76 }; 77 78 const char *__attribute_const__ ib_event_msg(enum ib_event_type event) 79 { 80 size_t index = event; 81 82 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ? 83 ib_events[index] : "unrecognized event"; 84 } 85 EXPORT_SYMBOL(ib_event_msg); 86 87 static const char * const wc_statuses[] = { 88 [IB_WC_SUCCESS] = "success", 89 [IB_WC_LOC_LEN_ERR] = "local length error", 90 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error", 91 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error", 92 [IB_WC_LOC_PROT_ERR] = "local protection error", 93 [IB_WC_WR_FLUSH_ERR] = "WR flushed", 94 [IB_WC_MW_BIND_ERR] = "memory management operation error", 95 [IB_WC_BAD_RESP_ERR] = "bad response error", 96 [IB_WC_LOC_ACCESS_ERR] = "local access error", 97 [IB_WC_REM_INV_REQ_ERR] = "invalid request error", 98 [IB_WC_REM_ACCESS_ERR] = "remote access error", 99 [IB_WC_REM_OP_ERR] = "remote operation error", 100 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded", 101 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded", 102 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error", 103 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request", 104 [IB_WC_REM_ABORT_ERR] = "operation aborted", 105 [IB_WC_INV_EECN_ERR] = "invalid EE context number", 106 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state", 107 [IB_WC_FATAL_ERR] = "fatal error", 108 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error", 109 [IB_WC_GENERAL_ERR] = "general error", 110 }; 111 112 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status) 113 { 114 size_t index = status; 115 116 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ? 117 wc_statuses[index] : "unrecognized status"; 118 } 119 EXPORT_SYMBOL(ib_wc_status_msg); 120 121 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate) 122 { 123 switch (rate) { 124 case IB_RATE_2_5_GBPS: return 1; 125 case IB_RATE_5_GBPS: return 2; 126 case IB_RATE_10_GBPS: return 4; 127 case IB_RATE_20_GBPS: return 8; 128 case IB_RATE_30_GBPS: return 12; 129 case IB_RATE_40_GBPS: return 16; 130 case IB_RATE_60_GBPS: return 24; 131 case IB_RATE_80_GBPS: return 32; 132 case IB_RATE_120_GBPS: return 48; 133 default: return -1; 134 } 135 } 136 EXPORT_SYMBOL(ib_rate_to_mult); 137 138 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult) 139 { 140 switch (mult) { 141 case 1: return IB_RATE_2_5_GBPS; 142 case 2: return IB_RATE_5_GBPS; 143 case 4: return IB_RATE_10_GBPS; 144 case 8: return IB_RATE_20_GBPS; 145 case 12: return IB_RATE_30_GBPS; 146 case 16: return IB_RATE_40_GBPS; 147 case 24: return IB_RATE_60_GBPS; 148 case 32: return IB_RATE_80_GBPS; 149 case 48: return IB_RATE_120_GBPS; 150 default: return IB_RATE_PORT_CURRENT; 151 } 152 } 153 EXPORT_SYMBOL(mult_to_ib_rate); 154 155 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate) 156 { 157 switch (rate) { 158 case IB_RATE_2_5_GBPS: return 2500; 159 case IB_RATE_5_GBPS: return 5000; 160 case IB_RATE_10_GBPS: return 10000; 161 case IB_RATE_20_GBPS: return 20000; 162 case IB_RATE_30_GBPS: return 30000; 163 case IB_RATE_40_GBPS: return 40000; 164 case IB_RATE_60_GBPS: return 60000; 165 case IB_RATE_80_GBPS: return 80000; 166 case IB_RATE_120_GBPS: return 120000; 167 case IB_RATE_14_GBPS: return 14062; 168 case IB_RATE_56_GBPS: return 56250; 169 case IB_RATE_112_GBPS: return 112500; 170 case IB_RATE_168_GBPS: return 168750; 171 case IB_RATE_25_GBPS: return 25781; 172 case IB_RATE_100_GBPS: return 103125; 173 case IB_RATE_200_GBPS: return 206250; 174 case IB_RATE_300_GBPS: return 309375; 175 default: return -1; 176 } 177 } 178 EXPORT_SYMBOL(ib_rate_to_mbps); 179 180 __attribute_const__ enum rdma_transport_type 181 rdma_node_get_transport(enum rdma_node_type node_type) 182 { 183 switch (node_type) { 184 case RDMA_NODE_IB_CA: 185 case RDMA_NODE_IB_SWITCH: 186 case RDMA_NODE_IB_ROUTER: 187 return RDMA_TRANSPORT_IB; 188 case RDMA_NODE_RNIC: 189 return RDMA_TRANSPORT_IWARP; 190 case RDMA_NODE_USNIC: 191 return RDMA_TRANSPORT_USNIC; 192 case RDMA_NODE_USNIC_UDP: 193 return RDMA_TRANSPORT_USNIC_UDP; 194 default: 195 BUG(); 196 return 0; 197 } 198 } 199 EXPORT_SYMBOL(rdma_node_get_transport); 200 201 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num) 202 { 203 if (device->get_link_layer) 204 return device->get_link_layer(device, port_num); 205 206 switch (rdma_node_get_transport(device->node_type)) { 207 case RDMA_TRANSPORT_IB: 208 return IB_LINK_LAYER_INFINIBAND; 209 case RDMA_TRANSPORT_IWARP: 210 case RDMA_TRANSPORT_USNIC: 211 case RDMA_TRANSPORT_USNIC_UDP: 212 return IB_LINK_LAYER_ETHERNET; 213 default: 214 return IB_LINK_LAYER_UNSPECIFIED; 215 } 216 } 217 EXPORT_SYMBOL(rdma_port_get_link_layer); 218 219 /* Protection domains */ 220 221 /** 222 * ib_alloc_pd - Allocates an unused protection domain. 223 * @device: The device on which to allocate the protection domain. 224 * 225 * A protection domain object provides an association between QPs, shared 226 * receive queues, address handles, memory regions, and memory windows. 227 * 228 * Every PD has a local_dma_lkey which can be used as the lkey value for local 229 * memory operations. 230 */ 231 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 232 const char *caller) 233 { 234 struct ib_pd *pd; 235 int mr_access_flags = 0; 236 237 pd = device->alloc_pd(device, NULL, NULL); 238 if (IS_ERR(pd)) 239 return pd; 240 241 pd->device = device; 242 pd->uobject = NULL; 243 pd->__internal_mr = NULL; 244 atomic_set(&pd->usecnt, 0); 245 pd->flags = flags; 246 247 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) 248 pd->local_dma_lkey = device->local_dma_lkey; 249 else 250 mr_access_flags |= IB_ACCESS_LOCAL_WRITE; 251 252 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) { 253 pr_warn("%s: enabling unsafe global rkey\n", caller); 254 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE; 255 } 256 257 if (mr_access_flags) { 258 struct ib_mr *mr; 259 260 mr = pd->device->get_dma_mr(pd, mr_access_flags); 261 if (IS_ERR(mr)) { 262 ib_dealloc_pd(pd); 263 return ERR_CAST(mr); 264 } 265 266 mr->device = pd->device; 267 mr->pd = pd; 268 mr->uobject = NULL; 269 mr->need_inval = false; 270 271 pd->__internal_mr = mr; 272 273 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) 274 pd->local_dma_lkey = pd->__internal_mr->lkey; 275 276 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) 277 pd->unsafe_global_rkey = pd->__internal_mr->rkey; 278 } 279 280 return pd; 281 } 282 EXPORT_SYMBOL(__ib_alloc_pd); 283 284 /** 285 * ib_dealloc_pd - Deallocates a protection domain. 286 * @pd: The protection domain to deallocate. 287 * 288 * It is an error to call this function while any resources in the pd still 289 * exist. The caller is responsible to synchronously destroy them and 290 * guarantee no new allocations will happen. 291 */ 292 void ib_dealloc_pd(struct ib_pd *pd) 293 { 294 int ret; 295 296 if (pd->__internal_mr) { 297 ret = pd->device->dereg_mr(pd->__internal_mr); 298 WARN_ON(ret); 299 pd->__internal_mr = NULL; 300 } 301 302 /* uverbs manipulates usecnt with proper locking, while the kabi 303 requires the caller to guarantee we can't race here. */ 304 WARN_ON(atomic_read(&pd->usecnt)); 305 306 /* Making delalloc_pd a void return is a WIP, no driver should return 307 an error here. */ 308 ret = pd->device->dealloc_pd(pd); 309 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd"); 310 } 311 EXPORT_SYMBOL(ib_dealloc_pd); 312 313 /* Address handles */ 314 315 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr) 316 { 317 struct ib_ah *ah; 318 319 ah = pd->device->create_ah(pd, ah_attr, NULL); 320 321 if (!IS_ERR(ah)) { 322 ah->device = pd->device; 323 ah->pd = pd; 324 ah->uobject = NULL; 325 ah->type = ah_attr->type; 326 atomic_inc(&pd->usecnt); 327 } 328 329 return ah; 330 } 331 EXPORT_SYMBOL(rdma_create_ah); 332 333 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr) 334 { 335 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh; 336 struct iphdr ip4h_checked; 337 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh; 338 339 /* If it's IPv6, the version must be 6, otherwise, the first 340 * 20 bytes (before the IPv4 header) are garbled. 341 */ 342 if (ip6h->version != 6) 343 return (ip4h->version == 4) ? 4 : 0; 344 /* version may be 6 or 4 because the first 20 bytes could be garbled */ 345 346 /* RoCE v2 requires no options, thus header length 347 * must be 5 words 348 */ 349 if (ip4h->ihl != 5) 350 return 6; 351 352 /* Verify checksum. 353 * We can't write on scattered buffers so we need to copy to 354 * temp buffer. 355 */ 356 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked)); 357 ip4h_checked.check = 0; 358 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5); 359 /* if IPv4 header checksum is OK, believe it */ 360 if (ip4h->check == ip4h_checked.check) 361 return 4; 362 return 6; 363 } 364 EXPORT_SYMBOL(ib_get_rdma_header_version); 365 366 static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device, 367 u8 port_num, 368 const struct ib_grh *grh) 369 { 370 int grh_version; 371 372 if (rdma_protocol_ib(device, port_num)) 373 return RDMA_NETWORK_IB; 374 375 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh); 376 377 if (grh_version == 4) 378 return RDMA_NETWORK_IPV4; 379 380 if (grh->next_hdr == IPPROTO_UDP) 381 return RDMA_NETWORK_IPV6; 382 383 return RDMA_NETWORK_ROCE_V1; 384 } 385 386 struct find_gid_index_context { 387 u16 vlan_id; 388 enum ib_gid_type gid_type; 389 }; 390 391 static bool find_gid_index(const union ib_gid *gid, 392 const struct ib_gid_attr *gid_attr, 393 void *context) 394 { 395 struct find_gid_index_context *ctx = 396 (struct find_gid_index_context *)context; 397 398 if (ctx->gid_type != gid_attr->gid_type) 399 return false; 400 401 if ((!!(ctx->vlan_id != 0xffff) == !is_vlan_dev(gid_attr->ndev)) || 402 (is_vlan_dev(gid_attr->ndev) && 403 vlan_dev_vlan_id(gid_attr->ndev) != ctx->vlan_id)) 404 return false; 405 406 return true; 407 } 408 409 static int get_sgid_index_from_eth(struct ib_device *device, u8 port_num, 410 u16 vlan_id, const union ib_gid *sgid, 411 enum ib_gid_type gid_type, 412 u16 *gid_index) 413 { 414 struct find_gid_index_context context = {.vlan_id = vlan_id, 415 .gid_type = gid_type}; 416 417 return ib_find_gid_by_filter(device, sgid, port_num, find_gid_index, 418 &context, gid_index); 419 } 420 421 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 422 enum rdma_network_type net_type, 423 union ib_gid *sgid, union ib_gid *dgid) 424 { 425 struct sockaddr_in src_in; 426 struct sockaddr_in dst_in; 427 __be32 src_saddr, dst_saddr; 428 429 if (!sgid || !dgid) 430 return -EINVAL; 431 432 if (net_type == RDMA_NETWORK_IPV4) { 433 memcpy(&src_in.sin_addr.s_addr, 434 &hdr->roce4grh.saddr, 4); 435 memcpy(&dst_in.sin_addr.s_addr, 436 &hdr->roce4grh.daddr, 4); 437 src_saddr = src_in.sin_addr.s_addr; 438 dst_saddr = dst_in.sin_addr.s_addr; 439 ipv6_addr_set_v4mapped(src_saddr, 440 (struct in6_addr *)sgid); 441 ipv6_addr_set_v4mapped(dst_saddr, 442 (struct in6_addr *)dgid); 443 return 0; 444 } else if (net_type == RDMA_NETWORK_IPV6 || 445 net_type == RDMA_NETWORK_IB) { 446 *dgid = hdr->ibgrh.dgid; 447 *sgid = hdr->ibgrh.sgid; 448 return 0; 449 } else { 450 return -EINVAL; 451 } 452 } 453 EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr); 454 455 /* 456 * This function creates ah from the incoming packet. 457 * Incoming packet has dgid of the receiver node on which this code is 458 * getting executed and, sgid contains the GID of the sender. 459 * 460 * When resolving mac address of destination, the arrived dgid is used 461 * as sgid and, sgid is used as dgid because sgid contains destinations 462 * GID whom to respond to. 463 * 464 * This is why when calling rdma_addr_find_l2_eth_by_grh() function, the 465 * position of arguments dgid and sgid do not match the order of the 466 * parameters. 467 */ 468 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, 469 const struct ib_wc *wc, const struct ib_grh *grh, 470 struct rdma_ah_attr *ah_attr) 471 { 472 u32 flow_class; 473 u16 gid_index; 474 int ret; 475 enum rdma_network_type net_type = RDMA_NETWORK_IB; 476 enum ib_gid_type gid_type = IB_GID_TYPE_IB; 477 int hoplimit = 0xff; 478 union ib_gid dgid; 479 union ib_gid sgid; 480 481 memset(ah_attr, 0, sizeof *ah_attr); 482 ah_attr->type = rdma_ah_find_type(device, port_num); 483 if (rdma_cap_eth_ah(device, port_num)) { 484 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE) 485 net_type = wc->network_hdr_type; 486 else 487 net_type = ib_get_net_type_by_grh(device, port_num, grh); 488 gid_type = ib_network_to_gid_type(net_type); 489 } 490 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type, 491 &sgid, &dgid); 492 if (ret) 493 return ret; 494 495 if (rdma_protocol_roce(device, port_num)) { 496 int if_index = 0; 497 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ? 498 wc->vlan_id : 0xffff; 499 struct net_device *idev; 500 struct net_device *resolved_dev; 501 502 if (!(wc->wc_flags & IB_WC_GRH)) 503 return -EPROTOTYPE; 504 505 if (!device->get_netdev) 506 return -EOPNOTSUPP; 507 508 idev = device->get_netdev(device, port_num); 509 if (!idev) 510 return -ENODEV; 511 512 ret = rdma_addr_find_l2_eth_by_grh(&dgid, &sgid, 513 ah_attr->roce.dmac, 514 wc->wc_flags & IB_WC_WITH_VLAN ? 515 NULL : &vlan_id, 516 &if_index, &hoplimit); 517 if (ret) { 518 dev_put(idev); 519 return ret; 520 } 521 522 resolved_dev = dev_get_by_index(&init_net, if_index); 523 rcu_read_lock(); 524 if (resolved_dev != idev && !rdma_is_upper_dev_rcu(idev, 525 resolved_dev)) 526 ret = -EHOSTUNREACH; 527 rcu_read_unlock(); 528 dev_put(idev); 529 dev_put(resolved_dev); 530 if (ret) 531 return ret; 532 533 ret = get_sgid_index_from_eth(device, port_num, vlan_id, 534 &dgid, gid_type, &gid_index); 535 if (ret) 536 return ret; 537 } 538 539 rdma_ah_set_dlid(ah_attr, wc->slid); 540 rdma_ah_set_sl(ah_attr, wc->sl); 541 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits); 542 rdma_ah_set_port_num(ah_attr, port_num); 543 544 if (wc->wc_flags & IB_WC_GRH) { 545 if (!rdma_cap_eth_ah(device, port_num)) { 546 if (dgid.global.interface_id != cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) { 547 ret = ib_find_cached_gid_by_port(device, &dgid, 548 IB_GID_TYPE_IB, 549 port_num, NULL, 550 &gid_index); 551 if (ret) 552 return ret; 553 } else { 554 gid_index = 0; 555 } 556 } 557 558 flow_class = be32_to_cpu(grh->version_tclass_flow); 559 rdma_ah_set_grh(ah_attr, &sgid, 560 flow_class & 0xFFFFF, 561 (u8)gid_index, hoplimit, 562 (flow_class >> 20) & 0xFF); 563 564 } 565 return 0; 566 } 567 EXPORT_SYMBOL(ib_init_ah_from_wc); 568 569 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 570 const struct ib_grh *grh, u8 port_num) 571 { 572 struct rdma_ah_attr ah_attr; 573 int ret; 574 575 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr); 576 if (ret) 577 return ERR_PTR(ret); 578 579 return rdma_create_ah(pd, &ah_attr); 580 } 581 EXPORT_SYMBOL(ib_create_ah_from_wc); 582 583 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 584 { 585 if (ah->type != ah_attr->type) 586 return -EINVAL; 587 588 return ah->device->modify_ah ? 589 ah->device->modify_ah(ah, ah_attr) : 590 -ENOSYS; 591 } 592 EXPORT_SYMBOL(rdma_modify_ah); 593 594 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 595 { 596 return ah->device->query_ah ? 597 ah->device->query_ah(ah, ah_attr) : 598 -ENOSYS; 599 } 600 EXPORT_SYMBOL(rdma_query_ah); 601 602 int rdma_destroy_ah(struct ib_ah *ah) 603 { 604 struct ib_pd *pd; 605 int ret; 606 607 pd = ah->pd; 608 ret = ah->device->destroy_ah(ah); 609 if (!ret) 610 atomic_dec(&pd->usecnt); 611 612 return ret; 613 } 614 EXPORT_SYMBOL(rdma_destroy_ah); 615 616 /* Shared receive queues */ 617 618 struct ib_srq *ib_create_srq(struct ib_pd *pd, 619 struct ib_srq_init_attr *srq_init_attr) 620 { 621 struct ib_srq *srq; 622 623 if (!pd->device->create_srq) 624 return ERR_PTR(-ENOSYS); 625 626 srq = pd->device->create_srq(pd, srq_init_attr, NULL); 627 628 if (!IS_ERR(srq)) { 629 srq->device = pd->device; 630 srq->pd = pd; 631 srq->uobject = NULL; 632 srq->event_handler = srq_init_attr->event_handler; 633 srq->srq_context = srq_init_attr->srq_context; 634 srq->srq_type = srq_init_attr->srq_type; 635 if (srq->srq_type == IB_SRQT_XRC) { 636 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd; 637 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq; 638 atomic_inc(&srq->ext.xrc.xrcd->usecnt); 639 atomic_inc(&srq->ext.xrc.cq->usecnt); 640 } 641 atomic_inc(&pd->usecnt); 642 atomic_set(&srq->usecnt, 0); 643 } 644 645 return srq; 646 } 647 EXPORT_SYMBOL(ib_create_srq); 648 649 int ib_modify_srq(struct ib_srq *srq, 650 struct ib_srq_attr *srq_attr, 651 enum ib_srq_attr_mask srq_attr_mask) 652 { 653 return srq->device->modify_srq ? 654 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) : 655 -ENOSYS; 656 } 657 EXPORT_SYMBOL(ib_modify_srq); 658 659 int ib_query_srq(struct ib_srq *srq, 660 struct ib_srq_attr *srq_attr) 661 { 662 return srq->device->query_srq ? 663 srq->device->query_srq(srq, srq_attr) : -ENOSYS; 664 } 665 EXPORT_SYMBOL(ib_query_srq); 666 667 int ib_destroy_srq(struct ib_srq *srq) 668 { 669 struct ib_pd *pd; 670 enum ib_srq_type srq_type; 671 struct ib_xrcd *uninitialized_var(xrcd); 672 struct ib_cq *uninitialized_var(cq); 673 int ret; 674 675 if (atomic_read(&srq->usecnt)) 676 return -EBUSY; 677 678 pd = srq->pd; 679 srq_type = srq->srq_type; 680 if (srq_type == IB_SRQT_XRC) { 681 xrcd = srq->ext.xrc.xrcd; 682 cq = srq->ext.xrc.cq; 683 } 684 685 ret = srq->device->destroy_srq(srq); 686 if (!ret) { 687 atomic_dec(&pd->usecnt); 688 if (srq_type == IB_SRQT_XRC) { 689 atomic_dec(&xrcd->usecnt); 690 atomic_dec(&cq->usecnt); 691 } 692 } 693 694 return ret; 695 } 696 EXPORT_SYMBOL(ib_destroy_srq); 697 698 /* Queue pairs */ 699 700 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) 701 { 702 struct ib_qp *qp = context; 703 unsigned long flags; 704 705 spin_lock_irqsave(&qp->device->event_handler_lock, flags); 706 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 707 if (event->element.qp->event_handler) 708 event->element.qp->event_handler(event, event->element.qp->qp_context); 709 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags); 710 } 711 712 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) 713 { 714 mutex_lock(&xrcd->tgt_qp_mutex); 715 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list); 716 mutex_unlock(&xrcd->tgt_qp_mutex); 717 } 718 719 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 720 void (*event_handler)(struct ib_event *, void *), 721 void *qp_context) 722 { 723 struct ib_qp *qp; 724 unsigned long flags; 725 int err; 726 727 qp = kzalloc(sizeof *qp, GFP_KERNEL); 728 if (!qp) 729 return ERR_PTR(-ENOMEM); 730 731 qp->real_qp = real_qp; 732 err = ib_open_shared_qp_security(qp, real_qp->device); 733 if (err) { 734 kfree(qp); 735 return ERR_PTR(err); 736 } 737 738 qp->real_qp = real_qp; 739 atomic_inc(&real_qp->usecnt); 740 qp->device = real_qp->device; 741 qp->event_handler = event_handler; 742 qp->qp_context = qp_context; 743 qp->qp_num = real_qp->qp_num; 744 qp->qp_type = real_qp->qp_type; 745 746 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 747 list_add(&qp->open_list, &real_qp->open_list); 748 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 749 750 return qp; 751 } 752 753 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 754 struct ib_qp_open_attr *qp_open_attr) 755 { 756 struct ib_qp *qp, *real_qp; 757 758 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 759 return ERR_PTR(-EINVAL); 760 761 qp = ERR_PTR(-EINVAL); 762 mutex_lock(&xrcd->tgt_qp_mutex); 763 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) { 764 if (real_qp->qp_num == qp_open_attr->qp_num) { 765 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 766 qp_open_attr->qp_context); 767 break; 768 } 769 } 770 mutex_unlock(&xrcd->tgt_qp_mutex); 771 return qp; 772 } 773 EXPORT_SYMBOL(ib_open_qp); 774 775 static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp, 776 struct ib_qp_init_attr *qp_init_attr) 777 { 778 struct ib_qp *real_qp = qp; 779 780 qp->event_handler = __ib_shared_qp_event_handler; 781 qp->qp_context = qp; 782 qp->pd = NULL; 783 qp->send_cq = qp->recv_cq = NULL; 784 qp->srq = NULL; 785 qp->xrcd = qp_init_attr->xrcd; 786 atomic_inc(&qp_init_attr->xrcd->usecnt); 787 INIT_LIST_HEAD(&qp->open_list); 788 789 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 790 qp_init_attr->qp_context); 791 if (!IS_ERR(qp)) 792 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); 793 else 794 real_qp->device->destroy_qp(real_qp); 795 return qp; 796 } 797 798 struct ib_qp *ib_create_qp(struct ib_pd *pd, 799 struct ib_qp_init_attr *qp_init_attr) 800 { 801 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device; 802 struct ib_qp *qp; 803 int ret; 804 805 if (qp_init_attr->rwq_ind_tbl && 806 (qp_init_attr->recv_cq || 807 qp_init_attr->srq || qp_init_attr->cap.max_recv_wr || 808 qp_init_attr->cap.max_recv_sge)) 809 return ERR_PTR(-EINVAL); 810 811 /* 812 * If the callers is using the RDMA API calculate the resources 813 * needed for the RDMA READ/WRITE operations. 814 * 815 * Note that these callers need to pass in a port number. 816 */ 817 if (qp_init_attr->cap.max_rdma_ctxs) 818 rdma_rw_init_qp(device, qp_init_attr); 819 820 qp = device->create_qp(pd, qp_init_attr, NULL); 821 if (IS_ERR(qp)) 822 return qp; 823 824 ret = ib_create_qp_security(qp, device); 825 if (ret) { 826 ib_destroy_qp(qp); 827 return ERR_PTR(ret); 828 } 829 830 qp->device = device; 831 qp->real_qp = qp; 832 qp->uobject = NULL; 833 qp->qp_type = qp_init_attr->qp_type; 834 qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl; 835 836 atomic_set(&qp->usecnt, 0); 837 qp->mrs_used = 0; 838 spin_lock_init(&qp->mr_lock); 839 INIT_LIST_HEAD(&qp->rdma_mrs); 840 INIT_LIST_HEAD(&qp->sig_mrs); 841 qp->port = 0; 842 843 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) 844 return ib_create_xrc_qp(qp, qp_init_attr); 845 846 qp->event_handler = qp_init_attr->event_handler; 847 qp->qp_context = qp_init_attr->qp_context; 848 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { 849 qp->recv_cq = NULL; 850 qp->srq = NULL; 851 } else { 852 qp->recv_cq = qp_init_attr->recv_cq; 853 if (qp_init_attr->recv_cq) 854 atomic_inc(&qp_init_attr->recv_cq->usecnt); 855 qp->srq = qp_init_attr->srq; 856 if (qp->srq) 857 atomic_inc(&qp_init_attr->srq->usecnt); 858 } 859 860 qp->pd = pd; 861 qp->send_cq = qp_init_attr->send_cq; 862 qp->xrcd = NULL; 863 864 atomic_inc(&pd->usecnt); 865 if (qp_init_attr->send_cq) 866 atomic_inc(&qp_init_attr->send_cq->usecnt); 867 if (qp_init_attr->rwq_ind_tbl) 868 atomic_inc(&qp->rwq_ind_tbl->usecnt); 869 870 if (qp_init_attr->cap.max_rdma_ctxs) { 871 ret = rdma_rw_init_mrs(qp, qp_init_attr); 872 if (ret) { 873 pr_err("failed to init MR pool ret= %d\n", ret); 874 ib_destroy_qp(qp); 875 return ERR_PTR(ret); 876 } 877 } 878 879 /* 880 * Note: all hw drivers guarantee that max_send_sge is lower than 881 * the device RDMA WRITE SGE limit but not all hw drivers ensure that 882 * max_send_sge <= max_sge_rd. 883 */ 884 qp->max_write_sge = qp_init_attr->cap.max_send_sge; 885 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge, 886 device->attrs.max_sge_rd); 887 888 return qp; 889 } 890 EXPORT_SYMBOL(ib_create_qp); 891 892 static const struct { 893 int valid; 894 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 895 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 896 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 897 [IB_QPS_RESET] = { 898 [IB_QPS_RESET] = { .valid = 1 }, 899 [IB_QPS_INIT] = { 900 .valid = 1, 901 .req_param = { 902 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 903 IB_QP_PORT | 904 IB_QP_QKEY), 905 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 906 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 907 IB_QP_PORT | 908 IB_QP_ACCESS_FLAGS), 909 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 910 IB_QP_PORT | 911 IB_QP_ACCESS_FLAGS), 912 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 913 IB_QP_PORT | 914 IB_QP_ACCESS_FLAGS), 915 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 916 IB_QP_PORT | 917 IB_QP_ACCESS_FLAGS), 918 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 919 IB_QP_QKEY), 920 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 921 IB_QP_QKEY), 922 } 923 }, 924 }, 925 [IB_QPS_INIT] = { 926 [IB_QPS_RESET] = { .valid = 1 }, 927 [IB_QPS_ERR] = { .valid = 1 }, 928 [IB_QPS_INIT] = { 929 .valid = 1, 930 .opt_param = { 931 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 932 IB_QP_PORT | 933 IB_QP_QKEY), 934 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 935 IB_QP_PORT | 936 IB_QP_ACCESS_FLAGS), 937 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 938 IB_QP_PORT | 939 IB_QP_ACCESS_FLAGS), 940 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 941 IB_QP_PORT | 942 IB_QP_ACCESS_FLAGS), 943 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 944 IB_QP_PORT | 945 IB_QP_ACCESS_FLAGS), 946 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 947 IB_QP_QKEY), 948 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 949 IB_QP_QKEY), 950 } 951 }, 952 [IB_QPS_RTR] = { 953 .valid = 1, 954 .req_param = { 955 [IB_QPT_UC] = (IB_QP_AV | 956 IB_QP_PATH_MTU | 957 IB_QP_DEST_QPN | 958 IB_QP_RQ_PSN), 959 [IB_QPT_RC] = (IB_QP_AV | 960 IB_QP_PATH_MTU | 961 IB_QP_DEST_QPN | 962 IB_QP_RQ_PSN | 963 IB_QP_MAX_DEST_RD_ATOMIC | 964 IB_QP_MIN_RNR_TIMER), 965 [IB_QPT_XRC_INI] = (IB_QP_AV | 966 IB_QP_PATH_MTU | 967 IB_QP_DEST_QPN | 968 IB_QP_RQ_PSN), 969 [IB_QPT_XRC_TGT] = (IB_QP_AV | 970 IB_QP_PATH_MTU | 971 IB_QP_DEST_QPN | 972 IB_QP_RQ_PSN | 973 IB_QP_MAX_DEST_RD_ATOMIC | 974 IB_QP_MIN_RNR_TIMER), 975 }, 976 .opt_param = { 977 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 978 IB_QP_QKEY), 979 [IB_QPT_UC] = (IB_QP_ALT_PATH | 980 IB_QP_ACCESS_FLAGS | 981 IB_QP_PKEY_INDEX), 982 [IB_QPT_RC] = (IB_QP_ALT_PATH | 983 IB_QP_ACCESS_FLAGS | 984 IB_QP_PKEY_INDEX), 985 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 986 IB_QP_ACCESS_FLAGS | 987 IB_QP_PKEY_INDEX), 988 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 989 IB_QP_ACCESS_FLAGS | 990 IB_QP_PKEY_INDEX), 991 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 992 IB_QP_QKEY), 993 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 994 IB_QP_QKEY), 995 }, 996 }, 997 }, 998 [IB_QPS_RTR] = { 999 [IB_QPS_RESET] = { .valid = 1 }, 1000 [IB_QPS_ERR] = { .valid = 1 }, 1001 [IB_QPS_RTS] = { 1002 .valid = 1, 1003 .req_param = { 1004 [IB_QPT_UD] = IB_QP_SQ_PSN, 1005 [IB_QPT_UC] = IB_QP_SQ_PSN, 1006 [IB_QPT_RC] = (IB_QP_TIMEOUT | 1007 IB_QP_RETRY_CNT | 1008 IB_QP_RNR_RETRY | 1009 IB_QP_SQ_PSN | 1010 IB_QP_MAX_QP_RD_ATOMIC), 1011 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 1012 IB_QP_RETRY_CNT | 1013 IB_QP_RNR_RETRY | 1014 IB_QP_SQ_PSN | 1015 IB_QP_MAX_QP_RD_ATOMIC), 1016 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 1017 IB_QP_SQ_PSN), 1018 [IB_QPT_SMI] = IB_QP_SQ_PSN, 1019 [IB_QPT_GSI] = IB_QP_SQ_PSN, 1020 }, 1021 .opt_param = { 1022 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1023 IB_QP_QKEY), 1024 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1025 IB_QP_ALT_PATH | 1026 IB_QP_ACCESS_FLAGS | 1027 IB_QP_PATH_MIG_STATE), 1028 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1029 IB_QP_ALT_PATH | 1030 IB_QP_ACCESS_FLAGS | 1031 IB_QP_MIN_RNR_TIMER | 1032 IB_QP_PATH_MIG_STATE), 1033 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1034 IB_QP_ALT_PATH | 1035 IB_QP_ACCESS_FLAGS | 1036 IB_QP_PATH_MIG_STATE), 1037 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1038 IB_QP_ALT_PATH | 1039 IB_QP_ACCESS_FLAGS | 1040 IB_QP_MIN_RNR_TIMER | 1041 IB_QP_PATH_MIG_STATE), 1042 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1043 IB_QP_QKEY), 1044 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1045 IB_QP_QKEY), 1046 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1047 } 1048 } 1049 }, 1050 [IB_QPS_RTS] = { 1051 [IB_QPS_RESET] = { .valid = 1 }, 1052 [IB_QPS_ERR] = { .valid = 1 }, 1053 [IB_QPS_RTS] = { 1054 .valid = 1, 1055 .opt_param = { 1056 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1057 IB_QP_QKEY), 1058 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1059 IB_QP_ACCESS_FLAGS | 1060 IB_QP_ALT_PATH | 1061 IB_QP_PATH_MIG_STATE), 1062 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1063 IB_QP_ACCESS_FLAGS | 1064 IB_QP_ALT_PATH | 1065 IB_QP_PATH_MIG_STATE | 1066 IB_QP_MIN_RNR_TIMER), 1067 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1068 IB_QP_ACCESS_FLAGS | 1069 IB_QP_ALT_PATH | 1070 IB_QP_PATH_MIG_STATE), 1071 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1072 IB_QP_ACCESS_FLAGS | 1073 IB_QP_ALT_PATH | 1074 IB_QP_PATH_MIG_STATE | 1075 IB_QP_MIN_RNR_TIMER), 1076 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1077 IB_QP_QKEY), 1078 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1079 IB_QP_QKEY), 1080 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1081 } 1082 }, 1083 [IB_QPS_SQD] = { 1084 .valid = 1, 1085 .opt_param = { 1086 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1087 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1088 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1089 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1090 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 1091 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1092 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 1093 } 1094 }, 1095 }, 1096 [IB_QPS_SQD] = { 1097 [IB_QPS_RESET] = { .valid = 1 }, 1098 [IB_QPS_ERR] = { .valid = 1 }, 1099 [IB_QPS_RTS] = { 1100 .valid = 1, 1101 .opt_param = { 1102 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1103 IB_QP_QKEY), 1104 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1105 IB_QP_ALT_PATH | 1106 IB_QP_ACCESS_FLAGS | 1107 IB_QP_PATH_MIG_STATE), 1108 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1109 IB_QP_ALT_PATH | 1110 IB_QP_ACCESS_FLAGS | 1111 IB_QP_MIN_RNR_TIMER | 1112 IB_QP_PATH_MIG_STATE), 1113 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1114 IB_QP_ALT_PATH | 1115 IB_QP_ACCESS_FLAGS | 1116 IB_QP_PATH_MIG_STATE), 1117 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1118 IB_QP_ALT_PATH | 1119 IB_QP_ACCESS_FLAGS | 1120 IB_QP_MIN_RNR_TIMER | 1121 IB_QP_PATH_MIG_STATE), 1122 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1123 IB_QP_QKEY), 1124 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1125 IB_QP_QKEY), 1126 } 1127 }, 1128 [IB_QPS_SQD] = { 1129 .valid = 1, 1130 .opt_param = { 1131 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1132 IB_QP_QKEY), 1133 [IB_QPT_UC] = (IB_QP_AV | 1134 IB_QP_ALT_PATH | 1135 IB_QP_ACCESS_FLAGS | 1136 IB_QP_PKEY_INDEX | 1137 IB_QP_PATH_MIG_STATE), 1138 [IB_QPT_RC] = (IB_QP_PORT | 1139 IB_QP_AV | 1140 IB_QP_TIMEOUT | 1141 IB_QP_RETRY_CNT | 1142 IB_QP_RNR_RETRY | 1143 IB_QP_MAX_QP_RD_ATOMIC | 1144 IB_QP_MAX_DEST_RD_ATOMIC | 1145 IB_QP_ALT_PATH | 1146 IB_QP_ACCESS_FLAGS | 1147 IB_QP_PKEY_INDEX | 1148 IB_QP_MIN_RNR_TIMER | 1149 IB_QP_PATH_MIG_STATE), 1150 [IB_QPT_XRC_INI] = (IB_QP_PORT | 1151 IB_QP_AV | 1152 IB_QP_TIMEOUT | 1153 IB_QP_RETRY_CNT | 1154 IB_QP_RNR_RETRY | 1155 IB_QP_MAX_QP_RD_ATOMIC | 1156 IB_QP_ALT_PATH | 1157 IB_QP_ACCESS_FLAGS | 1158 IB_QP_PKEY_INDEX | 1159 IB_QP_PATH_MIG_STATE), 1160 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 1161 IB_QP_AV | 1162 IB_QP_TIMEOUT | 1163 IB_QP_MAX_DEST_RD_ATOMIC | 1164 IB_QP_ALT_PATH | 1165 IB_QP_ACCESS_FLAGS | 1166 IB_QP_PKEY_INDEX | 1167 IB_QP_MIN_RNR_TIMER | 1168 IB_QP_PATH_MIG_STATE), 1169 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1170 IB_QP_QKEY), 1171 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1172 IB_QP_QKEY), 1173 } 1174 } 1175 }, 1176 [IB_QPS_SQE] = { 1177 [IB_QPS_RESET] = { .valid = 1 }, 1178 [IB_QPS_ERR] = { .valid = 1 }, 1179 [IB_QPS_RTS] = { 1180 .valid = 1, 1181 .opt_param = { 1182 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1183 IB_QP_QKEY), 1184 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1185 IB_QP_ACCESS_FLAGS), 1186 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1187 IB_QP_QKEY), 1188 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1189 IB_QP_QKEY), 1190 } 1191 } 1192 }, 1193 [IB_QPS_ERR] = { 1194 [IB_QPS_RESET] = { .valid = 1 }, 1195 [IB_QPS_ERR] = { .valid = 1 } 1196 } 1197 }; 1198 1199 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 1200 enum ib_qp_type type, enum ib_qp_attr_mask mask, 1201 enum rdma_link_layer ll) 1202 { 1203 enum ib_qp_attr_mask req_param, opt_param; 1204 1205 if (cur_state < 0 || cur_state > IB_QPS_ERR || 1206 next_state < 0 || next_state > IB_QPS_ERR) 1207 return 0; 1208 1209 if (mask & IB_QP_CUR_STATE && 1210 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 1211 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 1212 return 0; 1213 1214 if (!qp_state_table[cur_state][next_state].valid) 1215 return 0; 1216 1217 req_param = qp_state_table[cur_state][next_state].req_param[type]; 1218 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 1219 1220 if ((mask & req_param) != req_param) 1221 return 0; 1222 1223 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 1224 return 0; 1225 1226 return 1; 1227 } 1228 EXPORT_SYMBOL(ib_modify_qp_is_ok); 1229 1230 int ib_resolve_eth_dmac(struct ib_device *device, 1231 struct rdma_ah_attr *ah_attr) 1232 { 1233 int ret = 0; 1234 struct ib_global_route *grh; 1235 1236 if (!rdma_is_port_valid(device, rdma_ah_get_port_num(ah_attr))) 1237 return -EINVAL; 1238 1239 if (ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE) 1240 return 0; 1241 1242 grh = rdma_ah_retrieve_grh(ah_attr); 1243 1244 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw)) { 1245 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw, 1246 ah_attr->roce.dmac); 1247 } else { 1248 union ib_gid sgid; 1249 struct ib_gid_attr sgid_attr; 1250 int ifindex; 1251 int hop_limit; 1252 1253 ret = ib_query_gid(device, 1254 rdma_ah_get_port_num(ah_attr), 1255 grh->sgid_index, 1256 &sgid, &sgid_attr); 1257 1258 if (ret || !sgid_attr.ndev) { 1259 if (!ret) 1260 ret = -ENXIO; 1261 goto out; 1262 } 1263 1264 ifindex = sgid_attr.ndev->ifindex; 1265 1266 ret = 1267 rdma_addr_find_l2_eth_by_grh(&sgid, &grh->dgid, 1268 ah_attr->roce.dmac, 1269 NULL, &ifindex, &hop_limit); 1270 1271 dev_put(sgid_attr.ndev); 1272 1273 grh->hop_limit = hop_limit; 1274 } 1275 out: 1276 return ret; 1277 } 1278 EXPORT_SYMBOL(ib_resolve_eth_dmac); 1279 1280 /** 1281 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 1282 * @qp: The QP to modify. 1283 * @attr: On input, specifies the QP attributes to modify. On output, 1284 * the current values of selected QP attributes are returned. 1285 * @attr_mask: A bit-mask used to specify which attributes of the QP 1286 * are being modified. 1287 * @udata: pointer to user's input output buffer information 1288 * are being modified. 1289 * It returns 0 on success and returns appropriate error code on error. 1290 */ 1291 int ib_modify_qp_with_udata(struct ib_qp *qp, struct ib_qp_attr *attr, 1292 int attr_mask, struct ib_udata *udata) 1293 { 1294 int ret; 1295 1296 if (attr_mask & IB_QP_AV) { 1297 ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr); 1298 if (ret) 1299 return ret; 1300 } 1301 ret = ib_security_modify_qp(qp, attr, attr_mask, udata); 1302 if (!ret && (attr_mask & IB_QP_PORT)) 1303 qp->port = attr->port_num; 1304 1305 return ret; 1306 } 1307 EXPORT_SYMBOL(ib_modify_qp_with_udata); 1308 1309 int ib_modify_qp(struct ib_qp *qp, 1310 struct ib_qp_attr *qp_attr, 1311 int qp_attr_mask) 1312 { 1313 return ib_modify_qp_with_udata(qp, qp_attr, qp_attr_mask, NULL); 1314 } 1315 EXPORT_SYMBOL(ib_modify_qp); 1316 1317 int ib_query_qp(struct ib_qp *qp, 1318 struct ib_qp_attr *qp_attr, 1319 int qp_attr_mask, 1320 struct ib_qp_init_attr *qp_init_attr) 1321 { 1322 return qp->device->query_qp ? 1323 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) : 1324 -ENOSYS; 1325 } 1326 EXPORT_SYMBOL(ib_query_qp); 1327 1328 int ib_close_qp(struct ib_qp *qp) 1329 { 1330 struct ib_qp *real_qp; 1331 unsigned long flags; 1332 1333 real_qp = qp->real_qp; 1334 if (real_qp == qp) 1335 return -EINVAL; 1336 1337 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 1338 list_del(&qp->open_list); 1339 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 1340 1341 atomic_dec(&real_qp->usecnt); 1342 ib_close_shared_qp_security(qp->qp_sec); 1343 kfree(qp); 1344 1345 return 0; 1346 } 1347 EXPORT_SYMBOL(ib_close_qp); 1348 1349 static int __ib_destroy_shared_qp(struct ib_qp *qp) 1350 { 1351 struct ib_xrcd *xrcd; 1352 struct ib_qp *real_qp; 1353 int ret; 1354 1355 real_qp = qp->real_qp; 1356 xrcd = real_qp->xrcd; 1357 1358 mutex_lock(&xrcd->tgt_qp_mutex); 1359 ib_close_qp(qp); 1360 if (atomic_read(&real_qp->usecnt) == 0) 1361 list_del(&real_qp->xrcd_list); 1362 else 1363 real_qp = NULL; 1364 mutex_unlock(&xrcd->tgt_qp_mutex); 1365 1366 if (real_qp) { 1367 ret = ib_destroy_qp(real_qp); 1368 if (!ret) 1369 atomic_dec(&xrcd->usecnt); 1370 else 1371 __ib_insert_xrcd_qp(xrcd, real_qp); 1372 } 1373 1374 return 0; 1375 } 1376 1377 int ib_destroy_qp(struct ib_qp *qp) 1378 { 1379 struct ib_pd *pd; 1380 struct ib_cq *scq, *rcq; 1381 struct ib_srq *srq; 1382 struct ib_rwq_ind_table *ind_tbl; 1383 struct ib_qp_security *sec; 1384 int ret; 1385 1386 WARN_ON_ONCE(qp->mrs_used > 0); 1387 1388 if (atomic_read(&qp->usecnt)) 1389 return -EBUSY; 1390 1391 if (qp->real_qp != qp) 1392 return __ib_destroy_shared_qp(qp); 1393 1394 pd = qp->pd; 1395 scq = qp->send_cq; 1396 rcq = qp->recv_cq; 1397 srq = qp->srq; 1398 ind_tbl = qp->rwq_ind_tbl; 1399 sec = qp->qp_sec; 1400 if (sec) 1401 ib_destroy_qp_security_begin(sec); 1402 1403 if (!qp->uobject) 1404 rdma_rw_cleanup_mrs(qp); 1405 1406 ret = qp->device->destroy_qp(qp); 1407 if (!ret) { 1408 if (pd) 1409 atomic_dec(&pd->usecnt); 1410 if (scq) 1411 atomic_dec(&scq->usecnt); 1412 if (rcq) 1413 atomic_dec(&rcq->usecnt); 1414 if (srq) 1415 atomic_dec(&srq->usecnt); 1416 if (ind_tbl) 1417 atomic_dec(&ind_tbl->usecnt); 1418 if (sec) 1419 ib_destroy_qp_security_end(sec); 1420 } else { 1421 if (sec) 1422 ib_destroy_qp_security_abort(sec); 1423 } 1424 1425 return ret; 1426 } 1427 EXPORT_SYMBOL(ib_destroy_qp); 1428 1429 /* Completion queues */ 1430 1431 struct ib_cq *ib_create_cq(struct ib_device *device, 1432 ib_comp_handler comp_handler, 1433 void (*event_handler)(struct ib_event *, void *), 1434 void *cq_context, 1435 const struct ib_cq_init_attr *cq_attr) 1436 { 1437 struct ib_cq *cq; 1438 1439 cq = device->create_cq(device, cq_attr, NULL, NULL); 1440 1441 if (!IS_ERR(cq)) { 1442 cq->device = device; 1443 cq->uobject = NULL; 1444 cq->comp_handler = comp_handler; 1445 cq->event_handler = event_handler; 1446 cq->cq_context = cq_context; 1447 atomic_set(&cq->usecnt, 0); 1448 } 1449 1450 return cq; 1451 } 1452 EXPORT_SYMBOL(ib_create_cq); 1453 1454 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period) 1455 { 1456 return cq->device->modify_cq ? 1457 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS; 1458 } 1459 EXPORT_SYMBOL(ib_modify_cq); 1460 1461 int ib_destroy_cq(struct ib_cq *cq) 1462 { 1463 if (atomic_read(&cq->usecnt)) 1464 return -EBUSY; 1465 1466 return cq->device->destroy_cq(cq); 1467 } 1468 EXPORT_SYMBOL(ib_destroy_cq); 1469 1470 int ib_resize_cq(struct ib_cq *cq, int cqe) 1471 { 1472 return cq->device->resize_cq ? 1473 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; 1474 } 1475 EXPORT_SYMBOL(ib_resize_cq); 1476 1477 /* Memory regions */ 1478 1479 int ib_dereg_mr(struct ib_mr *mr) 1480 { 1481 struct ib_pd *pd = mr->pd; 1482 int ret; 1483 1484 ret = mr->device->dereg_mr(mr); 1485 if (!ret) 1486 atomic_dec(&pd->usecnt); 1487 1488 return ret; 1489 } 1490 EXPORT_SYMBOL(ib_dereg_mr); 1491 1492 /** 1493 * ib_alloc_mr() - Allocates a memory region 1494 * @pd: protection domain associated with the region 1495 * @mr_type: memory region type 1496 * @max_num_sg: maximum sg entries available for registration. 1497 * 1498 * Notes: 1499 * Memory registeration page/sg lists must not exceed max_num_sg. 1500 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed 1501 * max_num_sg * used_page_size. 1502 * 1503 */ 1504 struct ib_mr *ib_alloc_mr(struct ib_pd *pd, 1505 enum ib_mr_type mr_type, 1506 u32 max_num_sg) 1507 { 1508 struct ib_mr *mr; 1509 1510 if (!pd->device->alloc_mr) 1511 return ERR_PTR(-ENOSYS); 1512 1513 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg); 1514 if (!IS_ERR(mr)) { 1515 mr->device = pd->device; 1516 mr->pd = pd; 1517 mr->uobject = NULL; 1518 atomic_inc(&pd->usecnt); 1519 mr->need_inval = false; 1520 } 1521 1522 return mr; 1523 } 1524 EXPORT_SYMBOL(ib_alloc_mr); 1525 1526 /* "Fast" memory regions */ 1527 1528 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 1529 int mr_access_flags, 1530 struct ib_fmr_attr *fmr_attr) 1531 { 1532 struct ib_fmr *fmr; 1533 1534 if (!pd->device->alloc_fmr) 1535 return ERR_PTR(-ENOSYS); 1536 1537 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 1538 if (!IS_ERR(fmr)) { 1539 fmr->device = pd->device; 1540 fmr->pd = pd; 1541 atomic_inc(&pd->usecnt); 1542 } 1543 1544 return fmr; 1545 } 1546 EXPORT_SYMBOL(ib_alloc_fmr); 1547 1548 int ib_unmap_fmr(struct list_head *fmr_list) 1549 { 1550 struct ib_fmr *fmr; 1551 1552 if (list_empty(fmr_list)) 1553 return 0; 1554 1555 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 1556 return fmr->device->unmap_fmr(fmr_list); 1557 } 1558 EXPORT_SYMBOL(ib_unmap_fmr); 1559 1560 int ib_dealloc_fmr(struct ib_fmr *fmr) 1561 { 1562 struct ib_pd *pd; 1563 int ret; 1564 1565 pd = fmr->pd; 1566 ret = fmr->device->dealloc_fmr(fmr); 1567 if (!ret) 1568 atomic_dec(&pd->usecnt); 1569 1570 return ret; 1571 } 1572 EXPORT_SYMBOL(ib_dealloc_fmr); 1573 1574 /* Multicast groups */ 1575 1576 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1577 { 1578 int ret; 1579 1580 if (!qp->device->attach_mcast) 1581 return -ENOSYS; 1582 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || 1583 lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || 1584 lid == be16_to_cpu(IB_LID_PERMISSIVE)) 1585 return -EINVAL; 1586 1587 ret = qp->device->attach_mcast(qp, gid, lid); 1588 if (!ret) 1589 atomic_inc(&qp->usecnt); 1590 return ret; 1591 } 1592 EXPORT_SYMBOL(ib_attach_mcast); 1593 1594 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1595 { 1596 int ret; 1597 1598 if (!qp->device->detach_mcast) 1599 return -ENOSYS; 1600 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || 1601 lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || 1602 lid == be16_to_cpu(IB_LID_PERMISSIVE)) 1603 return -EINVAL; 1604 1605 ret = qp->device->detach_mcast(qp, gid, lid); 1606 if (!ret) 1607 atomic_dec(&qp->usecnt); 1608 return ret; 1609 } 1610 EXPORT_SYMBOL(ib_detach_mcast); 1611 1612 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device) 1613 { 1614 struct ib_xrcd *xrcd; 1615 1616 if (!device->alloc_xrcd) 1617 return ERR_PTR(-ENOSYS); 1618 1619 xrcd = device->alloc_xrcd(device, NULL, NULL); 1620 if (!IS_ERR(xrcd)) { 1621 xrcd->device = device; 1622 xrcd->inode = NULL; 1623 atomic_set(&xrcd->usecnt, 0); 1624 mutex_init(&xrcd->tgt_qp_mutex); 1625 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 1626 } 1627 1628 return xrcd; 1629 } 1630 EXPORT_SYMBOL(ib_alloc_xrcd); 1631 1632 int ib_dealloc_xrcd(struct ib_xrcd *xrcd) 1633 { 1634 struct ib_qp *qp; 1635 int ret; 1636 1637 if (atomic_read(&xrcd->usecnt)) 1638 return -EBUSY; 1639 1640 while (!list_empty(&xrcd->tgt_qp_list)) { 1641 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list); 1642 ret = ib_destroy_qp(qp); 1643 if (ret) 1644 return ret; 1645 } 1646 1647 return xrcd->device->dealloc_xrcd(xrcd); 1648 } 1649 EXPORT_SYMBOL(ib_dealloc_xrcd); 1650 1651 /** 1652 * ib_create_wq - Creates a WQ associated with the specified protection 1653 * domain. 1654 * @pd: The protection domain associated with the WQ. 1655 * @wq_init_attr: A list of initial attributes required to create the 1656 * WQ. If WQ creation succeeds, then the attributes are updated to 1657 * the actual capabilities of the created WQ. 1658 * 1659 * wq_init_attr->max_wr and wq_init_attr->max_sge determine 1660 * the requested size of the WQ, and set to the actual values allocated 1661 * on return. 1662 * If ib_create_wq() succeeds, then max_wr and max_sge will always be 1663 * at least as large as the requested values. 1664 */ 1665 struct ib_wq *ib_create_wq(struct ib_pd *pd, 1666 struct ib_wq_init_attr *wq_attr) 1667 { 1668 struct ib_wq *wq; 1669 1670 if (!pd->device->create_wq) 1671 return ERR_PTR(-ENOSYS); 1672 1673 wq = pd->device->create_wq(pd, wq_attr, NULL); 1674 if (!IS_ERR(wq)) { 1675 wq->event_handler = wq_attr->event_handler; 1676 wq->wq_context = wq_attr->wq_context; 1677 wq->wq_type = wq_attr->wq_type; 1678 wq->cq = wq_attr->cq; 1679 wq->device = pd->device; 1680 wq->pd = pd; 1681 wq->uobject = NULL; 1682 atomic_inc(&pd->usecnt); 1683 atomic_inc(&wq_attr->cq->usecnt); 1684 atomic_set(&wq->usecnt, 0); 1685 } 1686 return wq; 1687 } 1688 EXPORT_SYMBOL(ib_create_wq); 1689 1690 /** 1691 * ib_destroy_wq - Destroys the specified WQ. 1692 * @wq: The WQ to destroy. 1693 */ 1694 int ib_destroy_wq(struct ib_wq *wq) 1695 { 1696 int err; 1697 struct ib_cq *cq = wq->cq; 1698 struct ib_pd *pd = wq->pd; 1699 1700 if (atomic_read(&wq->usecnt)) 1701 return -EBUSY; 1702 1703 err = wq->device->destroy_wq(wq); 1704 if (!err) { 1705 atomic_dec(&pd->usecnt); 1706 atomic_dec(&cq->usecnt); 1707 } 1708 return err; 1709 } 1710 EXPORT_SYMBOL(ib_destroy_wq); 1711 1712 /** 1713 * ib_modify_wq - Modifies the specified WQ. 1714 * @wq: The WQ to modify. 1715 * @wq_attr: On input, specifies the WQ attributes to modify. 1716 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ 1717 * are being modified. 1718 * On output, the current values of selected WQ attributes are returned. 1719 */ 1720 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr, 1721 u32 wq_attr_mask) 1722 { 1723 int err; 1724 1725 if (!wq->device->modify_wq) 1726 return -ENOSYS; 1727 1728 err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL); 1729 return err; 1730 } 1731 EXPORT_SYMBOL(ib_modify_wq); 1732 1733 /* 1734 * ib_create_rwq_ind_table - Creates a RQ Indirection Table. 1735 * @device: The device on which to create the rwq indirection table. 1736 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to 1737 * create the Indirection Table. 1738 * 1739 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less 1740 * than the created ib_rwq_ind_table object and the caller is responsible 1741 * for its memory allocation/free. 1742 */ 1743 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device, 1744 struct ib_rwq_ind_table_init_attr *init_attr) 1745 { 1746 struct ib_rwq_ind_table *rwq_ind_table; 1747 int i; 1748 u32 table_size; 1749 1750 if (!device->create_rwq_ind_table) 1751 return ERR_PTR(-ENOSYS); 1752 1753 table_size = (1 << init_attr->log_ind_tbl_size); 1754 rwq_ind_table = device->create_rwq_ind_table(device, 1755 init_attr, NULL); 1756 if (IS_ERR(rwq_ind_table)) 1757 return rwq_ind_table; 1758 1759 rwq_ind_table->ind_tbl = init_attr->ind_tbl; 1760 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size; 1761 rwq_ind_table->device = device; 1762 rwq_ind_table->uobject = NULL; 1763 atomic_set(&rwq_ind_table->usecnt, 0); 1764 1765 for (i = 0; i < table_size; i++) 1766 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt); 1767 1768 return rwq_ind_table; 1769 } 1770 EXPORT_SYMBOL(ib_create_rwq_ind_table); 1771 1772 /* 1773 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table. 1774 * @wq_ind_table: The Indirection Table to destroy. 1775 */ 1776 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table) 1777 { 1778 int err, i; 1779 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size); 1780 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl; 1781 1782 if (atomic_read(&rwq_ind_table->usecnt)) 1783 return -EBUSY; 1784 1785 err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table); 1786 if (!err) { 1787 for (i = 0; i < table_size; i++) 1788 atomic_dec(&ind_tbl[i]->usecnt); 1789 } 1790 1791 return err; 1792 } 1793 EXPORT_SYMBOL(ib_destroy_rwq_ind_table); 1794 1795 struct ib_flow *ib_create_flow(struct ib_qp *qp, 1796 struct ib_flow_attr *flow_attr, 1797 int domain) 1798 { 1799 struct ib_flow *flow_id; 1800 if (!qp->device->create_flow) 1801 return ERR_PTR(-ENOSYS); 1802 1803 flow_id = qp->device->create_flow(qp, flow_attr, domain); 1804 if (!IS_ERR(flow_id)) { 1805 atomic_inc(&qp->usecnt); 1806 flow_id->qp = qp; 1807 } 1808 return flow_id; 1809 } 1810 EXPORT_SYMBOL(ib_create_flow); 1811 1812 int ib_destroy_flow(struct ib_flow *flow_id) 1813 { 1814 int err; 1815 struct ib_qp *qp = flow_id->qp; 1816 1817 err = qp->device->destroy_flow(flow_id); 1818 if (!err) 1819 atomic_dec(&qp->usecnt); 1820 return err; 1821 } 1822 EXPORT_SYMBOL(ib_destroy_flow); 1823 1824 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 1825 struct ib_mr_status *mr_status) 1826 { 1827 return mr->device->check_mr_status ? 1828 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS; 1829 } 1830 EXPORT_SYMBOL(ib_check_mr_status); 1831 1832 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port, 1833 int state) 1834 { 1835 if (!device->set_vf_link_state) 1836 return -ENOSYS; 1837 1838 return device->set_vf_link_state(device, vf, port, state); 1839 } 1840 EXPORT_SYMBOL(ib_set_vf_link_state); 1841 1842 int ib_get_vf_config(struct ib_device *device, int vf, u8 port, 1843 struct ifla_vf_info *info) 1844 { 1845 if (!device->get_vf_config) 1846 return -ENOSYS; 1847 1848 return device->get_vf_config(device, vf, port, info); 1849 } 1850 EXPORT_SYMBOL(ib_get_vf_config); 1851 1852 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port, 1853 struct ifla_vf_stats *stats) 1854 { 1855 if (!device->get_vf_stats) 1856 return -ENOSYS; 1857 1858 return device->get_vf_stats(device, vf, port, stats); 1859 } 1860 EXPORT_SYMBOL(ib_get_vf_stats); 1861 1862 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid, 1863 int type) 1864 { 1865 if (!device->set_vf_guid) 1866 return -ENOSYS; 1867 1868 return device->set_vf_guid(device, vf, port, guid, type); 1869 } 1870 EXPORT_SYMBOL(ib_set_vf_guid); 1871 1872 /** 1873 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list 1874 * and set it the memory region. 1875 * @mr: memory region 1876 * @sg: dma mapped scatterlist 1877 * @sg_nents: number of entries in sg 1878 * @sg_offset: offset in bytes into sg 1879 * @page_size: page vector desired page size 1880 * 1881 * Constraints: 1882 * - The first sg element is allowed to have an offset. 1883 * - Each sg element must either be aligned to page_size or virtually 1884 * contiguous to the previous element. In case an sg element has a 1885 * non-contiguous offset, the mapping prefix will not include it. 1886 * - The last sg element is allowed to have length less than page_size. 1887 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size 1888 * then only max_num_sg entries will be mapped. 1889 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these 1890 * constraints holds and the page_size argument is ignored. 1891 * 1892 * Returns the number of sg elements that were mapped to the memory region. 1893 * 1894 * After this completes successfully, the memory region 1895 * is ready for registration. 1896 */ 1897 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 1898 unsigned int *sg_offset, unsigned int page_size) 1899 { 1900 if (unlikely(!mr->device->map_mr_sg)) 1901 return -ENOSYS; 1902 1903 mr->page_size = page_size; 1904 1905 return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset); 1906 } 1907 EXPORT_SYMBOL(ib_map_mr_sg); 1908 1909 /** 1910 * ib_sg_to_pages() - Convert the largest prefix of a sg list 1911 * to a page vector 1912 * @mr: memory region 1913 * @sgl: dma mapped scatterlist 1914 * @sg_nents: number of entries in sg 1915 * @sg_offset_p: IN: start offset in bytes into sg 1916 * OUT: offset in bytes for element n of the sg of the first 1917 * byte that has not been processed where n is the return 1918 * value of this function. 1919 * @set_page: driver page assignment function pointer 1920 * 1921 * Core service helper for drivers to convert the largest 1922 * prefix of given sg list to a page vector. The sg list 1923 * prefix converted is the prefix that meet the requirements 1924 * of ib_map_mr_sg. 1925 * 1926 * Returns the number of sg elements that were assigned to 1927 * a page vector. 1928 */ 1929 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 1930 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64)) 1931 { 1932 struct scatterlist *sg; 1933 u64 last_end_dma_addr = 0; 1934 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0; 1935 unsigned int last_page_off = 0; 1936 u64 page_mask = ~((u64)mr->page_size - 1); 1937 int i, ret; 1938 1939 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0]))) 1940 return -EINVAL; 1941 1942 mr->iova = sg_dma_address(&sgl[0]) + sg_offset; 1943 mr->length = 0; 1944 1945 for_each_sg(sgl, sg, sg_nents, i) { 1946 u64 dma_addr = sg_dma_address(sg) + sg_offset; 1947 u64 prev_addr = dma_addr; 1948 unsigned int dma_len = sg_dma_len(sg) - sg_offset; 1949 u64 end_dma_addr = dma_addr + dma_len; 1950 u64 page_addr = dma_addr & page_mask; 1951 1952 /* 1953 * For the second and later elements, check whether either the 1954 * end of element i-1 or the start of element i is not aligned 1955 * on a page boundary. 1956 */ 1957 if (i && (last_page_off != 0 || page_addr != dma_addr)) { 1958 /* Stop mapping if there is a gap. */ 1959 if (last_end_dma_addr != dma_addr) 1960 break; 1961 1962 /* 1963 * Coalesce this element with the last. If it is small 1964 * enough just update mr->length. Otherwise start 1965 * mapping from the next page. 1966 */ 1967 goto next_page; 1968 } 1969 1970 do { 1971 ret = set_page(mr, page_addr); 1972 if (unlikely(ret < 0)) { 1973 sg_offset = prev_addr - sg_dma_address(sg); 1974 mr->length += prev_addr - dma_addr; 1975 if (sg_offset_p) 1976 *sg_offset_p = sg_offset; 1977 return i || sg_offset ? i : ret; 1978 } 1979 prev_addr = page_addr; 1980 next_page: 1981 page_addr += mr->page_size; 1982 } while (page_addr < end_dma_addr); 1983 1984 mr->length += dma_len; 1985 last_end_dma_addr = end_dma_addr; 1986 last_page_off = end_dma_addr & ~page_mask; 1987 1988 sg_offset = 0; 1989 } 1990 1991 if (sg_offset_p) 1992 *sg_offset_p = 0; 1993 return i; 1994 } 1995 EXPORT_SYMBOL(ib_sg_to_pages); 1996 1997 struct ib_drain_cqe { 1998 struct ib_cqe cqe; 1999 struct completion done; 2000 }; 2001 2002 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc) 2003 { 2004 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe, 2005 cqe); 2006 2007 complete(&cqe->done); 2008 } 2009 2010 /* 2011 * Post a WR and block until its completion is reaped for the SQ. 2012 */ 2013 static void __ib_drain_sq(struct ib_qp *qp) 2014 { 2015 struct ib_cq *cq = qp->send_cq; 2016 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2017 struct ib_drain_cqe sdrain; 2018 struct ib_send_wr swr = {}, *bad_swr; 2019 int ret; 2020 2021 swr.wr_cqe = &sdrain.cqe; 2022 sdrain.cqe.done = ib_drain_qp_done; 2023 init_completion(&sdrain.done); 2024 2025 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2026 if (ret) { 2027 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2028 return; 2029 } 2030 2031 ret = ib_post_send(qp, &swr, &bad_swr); 2032 if (ret) { 2033 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2034 return; 2035 } 2036 2037 if (cq->poll_ctx == IB_POLL_DIRECT) 2038 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0) 2039 ib_process_cq_direct(cq, -1); 2040 else 2041 wait_for_completion(&sdrain.done); 2042 } 2043 2044 /* 2045 * Post a WR and block until its completion is reaped for the RQ. 2046 */ 2047 static void __ib_drain_rq(struct ib_qp *qp) 2048 { 2049 struct ib_cq *cq = qp->recv_cq; 2050 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2051 struct ib_drain_cqe rdrain; 2052 struct ib_recv_wr rwr = {}, *bad_rwr; 2053 int ret; 2054 2055 rwr.wr_cqe = &rdrain.cqe; 2056 rdrain.cqe.done = ib_drain_qp_done; 2057 init_completion(&rdrain.done); 2058 2059 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2060 if (ret) { 2061 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2062 return; 2063 } 2064 2065 ret = ib_post_recv(qp, &rwr, &bad_rwr); 2066 if (ret) { 2067 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2068 return; 2069 } 2070 2071 if (cq->poll_ctx == IB_POLL_DIRECT) 2072 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0) 2073 ib_process_cq_direct(cq, -1); 2074 else 2075 wait_for_completion(&rdrain.done); 2076 } 2077 2078 /** 2079 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the 2080 * application. 2081 * @qp: queue pair to drain 2082 * 2083 * If the device has a provider-specific drain function, then 2084 * call that. Otherwise call the generic drain function 2085 * __ib_drain_sq(). 2086 * 2087 * The caller must: 2088 * 2089 * ensure there is room in the CQ and SQ for the drain work request and 2090 * completion. 2091 * 2092 * allocate the CQ using ib_alloc_cq(). 2093 * 2094 * ensure that there are no other contexts that are posting WRs concurrently. 2095 * Otherwise the drain is not guaranteed. 2096 */ 2097 void ib_drain_sq(struct ib_qp *qp) 2098 { 2099 if (qp->device->drain_sq) 2100 qp->device->drain_sq(qp); 2101 else 2102 __ib_drain_sq(qp); 2103 } 2104 EXPORT_SYMBOL(ib_drain_sq); 2105 2106 /** 2107 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the 2108 * application. 2109 * @qp: queue pair to drain 2110 * 2111 * If the device has a provider-specific drain function, then 2112 * call that. Otherwise call the generic drain function 2113 * __ib_drain_rq(). 2114 * 2115 * The caller must: 2116 * 2117 * ensure there is room in the CQ and RQ for the drain work request and 2118 * completion. 2119 * 2120 * allocate the CQ using ib_alloc_cq(). 2121 * 2122 * ensure that there are no other contexts that are posting WRs concurrently. 2123 * Otherwise the drain is not guaranteed. 2124 */ 2125 void ib_drain_rq(struct ib_qp *qp) 2126 { 2127 if (qp->device->drain_rq) 2128 qp->device->drain_rq(qp); 2129 else 2130 __ib_drain_rq(qp); 2131 } 2132 EXPORT_SYMBOL(ib_drain_rq); 2133 2134 /** 2135 * ib_drain_qp() - Block until all CQEs have been consumed by the 2136 * application on both the RQ and SQ. 2137 * @qp: queue pair to drain 2138 * 2139 * The caller must: 2140 * 2141 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests 2142 * and completions. 2143 * 2144 * allocate the CQs using ib_alloc_cq(). 2145 * 2146 * ensure that there are no other contexts that are posting WRs concurrently. 2147 * Otherwise the drain is not guaranteed. 2148 */ 2149 void ib_drain_qp(struct ib_qp *qp) 2150 { 2151 ib_drain_sq(qp); 2152 if (!qp->srq) 2153 ib_drain_rq(qp); 2154 } 2155 EXPORT_SYMBOL(ib_drain_qp); 2156