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 int ib_resolve_eth_dmac(struct ib_device *device, 57 struct rdma_ah_attr *ah_attr); 58 59 static const char * const ib_events[] = { 60 [IB_EVENT_CQ_ERR] = "CQ error", 61 [IB_EVENT_QP_FATAL] = "QP fatal error", 62 [IB_EVENT_QP_REQ_ERR] = "QP request error", 63 [IB_EVENT_QP_ACCESS_ERR] = "QP access error", 64 [IB_EVENT_COMM_EST] = "communication established", 65 [IB_EVENT_SQ_DRAINED] = "send queue drained", 66 [IB_EVENT_PATH_MIG] = "path migration successful", 67 [IB_EVENT_PATH_MIG_ERR] = "path migration error", 68 [IB_EVENT_DEVICE_FATAL] = "device fatal error", 69 [IB_EVENT_PORT_ACTIVE] = "port active", 70 [IB_EVENT_PORT_ERR] = "port error", 71 [IB_EVENT_LID_CHANGE] = "LID change", 72 [IB_EVENT_PKEY_CHANGE] = "P_key change", 73 [IB_EVENT_SM_CHANGE] = "SM change", 74 [IB_EVENT_SRQ_ERR] = "SRQ error", 75 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached", 76 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached", 77 [IB_EVENT_CLIENT_REREGISTER] = "client reregister", 78 [IB_EVENT_GID_CHANGE] = "GID changed", 79 }; 80 81 const char *__attribute_const__ ib_event_msg(enum ib_event_type event) 82 { 83 size_t index = event; 84 85 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ? 86 ib_events[index] : "unrecognized event"; 87 } 88 EXPORT_SYMBOL(ib_event_msg); 89 90 static const char * const wc_statuses[] = { 91 [IB_WC_SUCCESS] = "success", 92 [IB_WC_LOC_LEN_ERR] = "local length error", 93 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error", 94 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error", 95 [IB_WC_LOC_PROT_ERR] = "local protection error", 96 [IB_WC_WR_FLUSH_ERR] = "WR flushed", 97 [IB_WC_MW_BIND_ERR] = "memory management operation error", 98 [IB_WC_BAD_RESP_ERR] = "bad response error", 99 [IB_WC_LOC_ACCESS_ERR] = "local access error", 100 [IB_WC_REM_INV_REQ_ERR] = "invalid request error", 101 [IB_WC_REM_ACCESS_ERR] = "remote access error", 102 [IB_WC_REM_OP_ERR] = "remote operation error", 103 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded", 104 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded", 105 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error", 106 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request", 107 [IB_WC_REM_ABORT_ERR] = "operation aborted", 108 [IB_WC_INV_EECN_ERR] = "invalid EE context number", 109 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state", 110 [IB_WC_FATAL_ERR] = "fatal error", 111 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error", 112 [IB_WC_GENERAL_ERR] = "general error", 113 }; 114 115 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status) 116 { 117 size_t index = status; 118 119 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ? 120 wc_statuses[index] : "unrecognized status"; 121 } 122 EXPORT_SYMBOL(ib_wc_status_msg); 123 124 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate) 125 { 126 switch (rate) { 127 case IB_RATE_2_5_GBPS: return 1; 128 case IB_RATE_5_GBPS: return 2; 129 case IB_RATE_10_GBPS: return 4; 130 case IB_RATE_20_GBPS: return 8; 131 case IB_RATE_30_GBPS: return 12; 132 case IB_RATE_40_GBPS: return 16; 133 case IB_RATE_60_GBPS: return 24; 134 case IB_RATE_80_GBPS: return 32; 135 case IB_RATE_120_GBPS: return 48; 136 case IB_RATE_14_GBPS: return 6; 137 case IB_RATE_56_GBPS: return 22; 138 case IB_RATE_112_GBPS: return 45; 139 case IB_RATE_168_GBPS: return 67; 140 case IB_RATE_25_GBPS: return 10; 141 case IB_RATE_100_GBPS: return 40; 142 case IB_RATE_200_GBPS: return 80; 143 case IB_RATE_300_GBPS: return 120; 144 default: return -1; 145 } 146 } 147 EXPORT_SYMBOL(ib_rate_to_mult); 148 149 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult) 150 { 151 switch (mult) { 152 case 1: return IB_RATE_2_5_GBPS; 153 case 2: return IB_RATE_5_GBPS; 154 case 4: return IB_RATE_10_GBPS; 155 case 8: return IB_RATE_20_GBPS; 156 case 12: return IB_RATE_30_GBPS; 157 case 16: return IB_RATE_40_GBPS; 158 case 24: return IB_RATE_60_GBPS; 159 case 32: return IB_RATE_80_GBPS; 160 case 48: return IB_RATE_120_GBPS; 161 case 6: return IB_RATE_14_GBPS; 162 case 22: return IB_RATE_56_GBPS; 163 case 45: return IB_RATE_112_GBPS; 164 case 67: return IB_RATE_168_GBPS; 165 case 10: return IB_RATE_25_GBPS; 166 case 40: return IB_RATE_100_GBPS; 167 case 80: return IB_RATE_200_GBPS; 168 case 120: return IB_RATE_300_GBPS; 169 default: return IB_RATE_PORT_CURRENT; 170 } 171 } 172 EXPORT_SYMBOL(mult_to_ib_rate); 173 174 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate) 175 { 176 switch (rate) { 177 case IB_RATE_2_5_GBPS: return 2500; 178 case IB_RATE_5_GBPS: return 5000; 179 case IB_RATE_10_GBPS: return 10000; 180 case IB_RATE_20_GBPS: return 20000; 181 case IB_RATE_30_GBPS: return 30000; 182 case IB_RATE_40_GBPS: return 40000; 183 case IB_RATE_60_GBPS: return 60000; 184 case IB_RATE_80_GBPS: return 80000; 185 case IB_RATE_120_GBPS: return 120000; 186 case IB_RATE_14_GBPS: return 14062; 187 case IB_RATE_56_GBPS: return 56250; 188 case IB_RATE_112_GBPS: return 112500; 189 case IB_RATE_168_GBPS: return 168750; 190 case IB_RATE_25_GBPS: return 25781; 191 case IB_RATE_100_GBPS: return 103125; 192 case IB_RATE_200_GBPS: return 206250; 193 case IB_RATE_300_GBPS: return 309375; 194 default: return -1; 195 } 196 } 197 EXPORT_SYMBOL(ib_rate_to_mbps); 198 199 __attribute_const__ enum rdma_transport_type 200 rdma_node_get_transport(enum rdma_node_type node_type) 201 { 202 203 if (node_type == RDMA_NODE_USNIC) 204 return RDMA_TRANSPORT_USNIC; 205 if (node_type == RDMA_NODE_USNIC_UDP) 206 return RDMA_TRANSPORT_USNIC_UDP; 207 if (node_type == RDMA_NODE_RNIC) 208 return RDMA_TRANSPORT_IWARP; 209 210 return RDMA_TRANSPORT_IB; 211 } 212 EXPORT_SYMBOL(rdma_node_get_transport); 213 214 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num) 215 { 216 enum rdma_transport_type lt; 217 if (device->get_link_layer) 218 return device->get_link_layer(device, port_num); 219 220 lt = rdma_node_get_transport(device->node_type); 221 if (lt == RDMA_TRANSPORT_IB) 222 return IB_LINK_LAYER_INFINIBAND; 223 224 return IB_LINK_LAYER_ETHERNET; 225 } 226 EXPORT_SYMBOL(rdma_port_get_link_layer); 227 228 /* Protection domains */ 229 230 /** 231 * ib_alloc_pd - Allocates an unused protection domain. 232 * @device: The device on which to allocate the protection domain. 233 * 234 * A protection domain object provides an association between QPs, shared 235 * receive queues, address handles, memory regions, and memory windows. 236 * 237 * Every PD has a local_dma_lkey which can be used as the lkey value for local 238 * memory operations. 239 */ 240 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags, 241 const char *caller) 242 { 243 struct ib_pd *pd; 244 int mr_access_flags = 0; 245 246 pd = device->alloc_pd(device, NULL, NULL); 247 if (IS_ERR(pd)) 248 return pd; 249 250 pd->device = device; 251 pd->uobject = NULL; 252 pd->__internal_mr = NULL; 253 atomic_set(&pd->usecnt, 0); 254 pd->flags = flags; 255 256 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) 257 pd->local_dma_lkey = device->local_dma_lkey; 258 else 259 mr_access_flags |= IB_ACCESS_LOCAL_WRITE; 260 261 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) { 262 pr_warn("%s: enabling unsafe global rkey\n", caller); 263 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE; 264 } 265 266 pd->res.type = RDMA_RESTRACK_PD; 267 pd->res.kern_name = caller; 268 rdma_restrack_add(&pd->res); 269 270 if (mr_access_flags) { 271 struct ib_mr *mr; 272 273 mr = pd->device->get_dma_mr(pd, mr_access_flags); 274 if (IS_ERR(mr)) { 275 ib_dealloc_pd(pd); 276 return ERR_CAST(mr); 277 } 278 279 mr->device = pd->device; 280 mr->pd = pd; 281 mr->uobject = NULL; 282 mr->need_inval = false; 283 284 pd->__internal_mr = mr; 285 286 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) 287 pd->local_dma_lkey = pd->__internal_mr->lkey; 288 289 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) 290 pd->unsafe_global_rkey = pd->__internal_mr->rkey; 291 } 292 293 return pd; 294 } 295 EXPORT_SYMBOL(__ib_alloc_pd); 296 297 /** 298 * ib_dealloc_pd - Deallocates a protection domain. 299 * @pd: The protection domain to deallocate. 300 * 301 * It is an error to call this function while any resources in the pd still 302 * exist. The caller is responsible to synchronously destroy them and 303 * guarantee no new allocations will happen. 304 */ 305 void ib_dealloc_pd(struct ib_pd *pd) 306 { 307 int ret; 308 309 if (pd->__internal_mr) { 310 ret = pd->device->dereg_mr(pd->__internal_mr); 311 WARN_ON(ret); 312 pd->__internal_mr = NULL; 313 } 314 315 /* uverbs manipulates usecnt with proper locking, while the kabi 316 requires the caller to guarantee we can't race here. */ 317 WARN_ON(atomic_read(&pd->usecnt)); 318 319 rdma_restrack_del(&pd->res); 320 /* Making delalloc_pd a void return is a WIP, no driver should return 321 an error here. */ 322 ret = pd->device->dealloc_pd(pd); 323 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd"); 324 } 325 EXPORT_SYMBOL(ib_dealloc_pd); 326 327 /* Address handles */ 328 329 static struct ib_ah *_rdma_create_ah(struct ib_pd *pd, 330 struct rdma_ah_attr *ah_attr, 331 struct ib_udata *udata) 332 { 333 struct ib_ah *ah; 334 335 ah = pd->device->create_ah(pd, ah_attr, udata); 336 337 if (!IS_ERR(ah)) { 338 ah->device = pd->device; 339 ah->pd = pd; 340 ah->uobject = NULL; 341 ah->type = ah_attr->type; 342 atomic_inc(&pd->usecnt); 343 } 344 345 return ah; 346 } 347 348 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr) 349 { 350 return _rdma_create_ah(pd, ah_attr, NULL); 351 } 352 EXPORT_SYMBOL(rdma_create_ah); 353 354 /** 355 * rdma_create_user_ah - Creates an address handle for the 356 * given address vector. 357 * It resolves destination mac address for ah attribute of RoCE type. 358 * @pd: The protection domain associated with the address handle. 359 * @ah_attr: The attributes of the address vector. 360 * @udata: pointer to user's input output buffer information need by 361 * provider driver. 362 * 363 * It returns 0 on success and returns appropriate error code on error. 364 * The address handle is used to reference a local or global destination 365 * in all UD QP post sends. 366 */ 367 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd, 368 struct rdma_ah_attr *ah_attr, 369 struct ib_udata *udata) 370 { 371 int err; 372 373 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) { 374 err = ib_resolve_eth_dmac(pd->device, ah_attr); 375 if (err) 376 return ERR_PTR(err); 377 } 378 379 return _rdma_create_ah(pd, ah_attr, udata); 380 } 381 EXPORT_SYMBOL(rdma_create_user_ah); 382 383 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr) 384 { 385 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh; 386 struct iphdr ip4h_checked; 387 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh; 388 389 /* If it's IPv6, the version must be 6, otherwise, the first 390 * 20 bytes (before the IPv4 header) are garbled. 391 */ 392 if (ip6h->version != 6) 393 return (ip4h->version == 4) ? 4 : 0; 394 /* version may be 6 or 4 because the first 20 bytes could be garbled */ 395 396 /* RoCE v2 requires no options, thus header length 397 * must be 5 words 398 */ 399 if (ip4h->ihl != 5) 400 return 6; 401 402 /* Verify checksum. 403 * We can't write on scattered buffers so we need to copy to 404 * temp buffer. 405 */ 406 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked)); 407 ip4h_checked.check = 0; 408 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5); 409 /* if IPv4 header checksum is OK, believe it */ 410 if (ip4h->check == ip4h_checked.check) 411 return 4; 412 return 6; 413 } 414 EXPORT_SYMBOL(ib_get_rdma_header_version); 415 416 static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device, 417 u8 port_num, 418 const struct ib_grh *grh) 419 { 420 int grh_version; 421 422 if (rdma_protocol_ib(device, port_num)) 423 return RDMA_NETWORK_IB; 424 425 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh); 426 427 if (grh_version == 4) 428 return RDMA_NETWORK_IPV4; 429 430 if (grh->next_hdr == IPPROTO_UDP) 431 return RDMA_NETWORK_IPV6; 432 433 return RDMA_NETWORK_ROCE_V1; 434 } 435 436 struct find_gid_index_context { 437 u16 vlan_id; 438 enum ib_gid_type gid_type; 439 }; 440 441 static bool find_gid_index(const union ib_gid *gid, 442 const struct ib_gid_attr *gid_attr, 443 void *context) 444 { 445 struct find_gid_index_context *ctx = context; 446 447 if (ctx->gid_type != gid_attr->gid_type) 448 return false; 449 450 if ((!!(ctx->vlan_id != 0xffff) == !is_vlan_dev(gid_attr->ndev)) || 451 (is_vlan_dev(gid_attr->ndev) && 452 vlan_dev_vlan_id(gid_attr->ndev) != ctx->vlan_id)) 453 return false; 454 455 return true; 456 } 457 458 static int get_sgid_index_from_eth(struct ib_device *device, u8 port_num, 459 u16 vlan_id, const union ib_gid *sgid, 460 enum ib_gid_type gid_type, 461 u16 *gid_index) 462 { 463 struct find_gid_index_context context = {.vlan_id = vlan_id, 464 .gid_type = gid_type}; 465 466 return ib_find_gid_by_filter(device, sgid, port_num, find_gid_index, 467 &context, gid_index); 468 } 469 470 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr, 471 enum rdma_network_type net_type, 472 union ib_gid *sgid, union ib_gid *dgid) 473 { 474 struct sockaddr_in src_in; 475 struct sockaddr_in dst_in; 476 __be32 src_saddr, dst_saddr; 477 478 if (!sgid || !dgid) 479 return -EINVAL; 480 481 if (net_type == RDMA_NETWORK_IPV4) { 482 memcpy(&src_in.sin_addr.s_addr, 483 &hdr->roce4grh.saddr, 4); 484 memcpy(&dst_in.sin_addr.s_addr, 485 &hdr->roce4grh.daddr, 4); 486 src_saddr = src_in.sin_addr.s_addr; 487 dst_saddr = dst_in.sin_addr.s_addr; 488 ipv6_addr_set_v4mapped(src_saddr, 489 (struct in6_addr *)sgid); 490 ipv6_addr_set_v4mapped(dst_saddr, 491 (struct in6_addr *)dgid); 492 return 0; 493 } else if (net_type == RDMA_NETWORK_IPV6 || 494 net_type == RDMA_NETWORK_IB) { 495 *dgid = hdr->ibgrh.dgid; 496 *sgid = hdr->ibgrh.sgid; 497 return 0; 498 } else { 499 return -EINVAL; 500 } 501 } 502 EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr); 503 504 /* Resolve destination mac address and hop limit for unicast destination 505 * GID entry, considering the source GID entry as well. 506 * ah_attribute must have have valid port_num, sgid_index. 507 */ 508 static int ib_resolve_unicast_gid_dmac(struct ib_device *device, 509 struct rdma_ah_attr *ah_attr) 510 { 511 struct ib_gid_attr sgid_attr; 512 struct ib_global_route *grh; 513 int hop_limit = 0xff; 514 union ib_gid sgid; 515 int ret; 516 517 grh = rdma_ah_retrieve_grh(ah_attr); 518 519 ret = ib_query_gid(device, 520 rdma_ah_get_port_num(ah_attr), 521 grh->sgid_index, 522 &sgid, &sgid_attr); 523 if (ret || !sgid_attr.ndev) { 524 if (!ret) 525 ret = -ENXIO; 526 return ret; 527 } 528 529 /* If destination is link local and source GID is RoCEv1, 530 * IP stack is not used. 531 */ 532 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) && 533 sgid_attr.gid_type == IB_GID_TYPE_ROCE) { 534 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw, 535 ah_attr->roce.dmac); 536 goto done; 537 } 538 539 ret = rdma_addr_find_l2_eth_by_grh(&sgid, &grh->dgid, 540 ah_attr->roce.dmac, 541 sgid_attr.ndev, &hop_limit); 542 done: 543 dev_put(sgid_attr.ndev); 544 545 grh->hop_limit = hop_limit; 546 return ret; 547 } 548 549 /* 550 * This function initializes address handle attributes from the incoming packet. 551 * Incoming packet has dgid of the receiver node on which this code is 552 * getting executed and, sgid contains the GID of the sender. 553 * 554 * When resolving mac address of destination, the arrived dgid is used 555 * as sgid and, sgid is used as dgid because sgid contains destinations 556 * GID whom to respond to. 557 * 558 */ 559 int ib_init_ah_attr_from_wc(struct ib_device *device, u8 port_num, 560 const struct ib_wc *wc, const struct ib_grh *grh, 561 struct rdma_ah_attr *ah_attr) 562 { 563 u32 flow_class; 564 u16 gid_index; 565 int ret; 566 enum rdma_network_type net_type = RDMA_NETWORK_IB; 567 enum ib_gid_type gid_type = IB_GID_TYPE_IB; 568 int hoplimit = 0xff; 569 union ib_gid dgid; 570 union ib_gid sgid; 571 572 might_sleep(); 573 574 memset(ah_attr, 0, sizeof *ah_attr); 575 ah_attr->type = rdma_ah_find_type(device, port_num); 576 if (rdma_cap_eth_ah(device, port_num)) { 577 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE) 578 net_type = wc->network_hdr_type; 579 else 580 net_type = ib_get_net_type_by_grh(device, port_num, grh); 581 gid_type = ib_network_to_gid_type(net_type); 582 } 583 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type, 584 &sgid, &dgid); 585 if (ret) 586 return ret; 587 588 rdma_ah_set_sl(ah_attr, wc->sl); 589 rdma_ah_set_port_num(ah_attr, port_num); 590 591 if (rdma_protocol_roce(device, port_num)) { 592 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ? 593 wc->vlan_id : 0xffff; 594 595 if (!(wc->wc_flags & IB_WC_GRH)) 596 return -EPROTOTYPE; 597 598 ret = get_sgid_index_from_eth(device, port_num, 599 vlan_id, &dgid, 600 gid_type, &gid_index); 601 if (ret) 602 return ret; 603 604 flow_class = be32_to_cpu(grh->version_tclass_flow); 605 rdma_ah_set_grh(ah_attr, &sgid, 606 flow_class & 0xFFFFF, 607 (u8)gid_index, hoplimit, 608 (flow_class >> 20) & 0xFF); 609 return ib_resolve_unicast_gid_dmac(device, ah_attr); 610 } else { 611 rdma_ah_set_dlid(ah_attr, wc->slid); 612 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits); 613 614 if (wc->wc_flags & IB_WC_GRH) { 615 if (dgid.global.interface_id != cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) { 616 ret = ib_find_cached_gid_by_port(device, &dgid, 617 IB_GID_TYPE_IB, 618 port_num, NULL, 619 &gid_index); 620 if (ret) 621 return ret; 622 } else { 623 gid_index = 0; 624 } 625 626 flow_class = be32_to_cpu(grh->version_tclass_flow); 627 rdma_ah_set_grh(ah_attr, &sgid, 628 flow_class & 0xFFFFF, 629 (u8)gid_index, hoplimit, 630 (flow_class >> 20) & 0xFF); 631 } 632 return 0; 633 } 634 } 635 EXPORT_SYMBOL(ib_init_ah_attr_from_wc); 636 637 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc, 638 const struct ib_grh *grh, u8 port_num) 639 { 640 struct rdma_ah_attr ah_attr; 641 int ret; 642 643 ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr); 644 if (ret) 645 return ERR_PTR(ret); 646 647 return rdma_create_ah(pd, &ah_attr); 648 } 649 EXPORT_SYMBOL(ib_create_ah_from_wc); 650 651 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 652 { 653 if (ah->type != ah_attr->type) 654 return -EINVAL; 655 656 return ah->device->modify_ah ? 657 ah->device->modify_ah(ah, ah_attr) : 658 -EOPNOTSUPP; 659 } 660 EXPORT_SYMBOL(rdma_modify_ah); 661 662 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr) 663 { 664 return ah->device->query_ah ? 665 ah->device->query_ah(ah, ah_attr) : 666 -EOPNOTSUPP; 667 } 668 EXPORT_SYMBOL(rdma_query_ah); 669 670 int rdma_destroy_ah(struct ib_ah *ah) 671 { 672 struct ib_pd *pd; 673 int ret; 674 675 pd = ah->pd; 676 ret = ah->device->destroy_ah(ah); 677 if (!ret) 678 atomic_dec(&pd->usecnt); 679 680 return ret; 681 } 682 EXPORT_SYMBOL(rdma_destroy_ah); 683 684 /* Shared receive queues */ 685 686 struct ib_srq *ib_create_srq(struct ib_pd *pd, 687 struct ib_srq_init_attr *srq_init_attr) 688 { 689 struct ib_srq *srq; 690 691 if (!pd->device->create_srq) 692 return ERR_PTR(-EOPNOTSUPP); 693 694 srq = pd->device->create_srq(pd, srq_init_attr, NULL); 695 696 if (!IS_ERR(srq)) { 697 srq->device = pd->device; 698 srq->pd = pd; 699 srq->uobject = NULL; 700 srq->event_handler = srq_init_attr->event_handler; 701 srq->srq_context = srq_init_attr->srq_context; 702 srq->srq_type = srq_init_attr->srq_type; 703 if (ib_srq_has_cq(srq->srq_type)) { 704 srq->ext.cq = srq_init_attr->ext.cq; 705 atomic_inc(&srq->ext.cq->usecnt); 706 } 707 if (srq->srq_type == IB_SRQT_XRC) { 708 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd; 709 atomic_inc(&srq->ext.xrc.xrcd->usecnt); 710 } 711 atomic_inc(&pd->usecnt); 712 atomic_set(&srq->usecnt, 0); 713 } 714 715 return srq; 716 } 717 EXPORT_SYMBOL(ib_create_srq); 718 719 int ib_modify_srq(struct ib_srq *srq, 720 struct ib_srq_attr *srq_attr, 721 enum ib_srq_attr_mask srq_attr_mask) 722 { 723 return srq->device->modify_srq ? 724 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) : 725 -EOPNOTSUPP; 726 } 727 EXPORT_SYMBOL(ib_modify_srq); 728 729 int ib_query_srq(struct ib_srq *srq, 730 struct ib_srq_attr *srq_attr) 731 { 732 return srq->device->query_srq ? 733 srq->device->query_srq(srq, srq_attr) : -EOPNOTSUPP; 734 } 735 EXPORT_SYMBOL(ib_query_srq); 736 737 int ib_destroy_srq(struct ib_srq *srq) 738 { 739 struct ib_pd *pd; 740 enum ib_srq_type srq_type; 741 struct ib_xrcd *uninitialized_var(xrcd); 742 struct ib_cq *uninitialized_var(cq); 743 int ret; 744 745 if (atomic_read(&srq->usecnt)) 746 return -EBUSY; 747 748 pd = srq->pd; 749 srq_type = srq->srq_type; 750 if (ib_srq_has_cq(srq_type)) 751 cq = srq->ext.cq; 752 if (srq_type == IB_SRQT_XRC) 753 xrcd = srq->ext.xrc.xrcd; 754 755 ret = srq->device->destroy_srq(srq); 756 if (!ret) { 757 atomic_dec(&pd->usecnt); 758 if (srq_type == IB_SRQT_XRC) 759 atomic_dec(&xrcd->usecnt); 760 if (ib_srq_has_cq(srq_type)) 761 atomic_dec(&cq->usecnt); 762 } 763 764 return ret; 765 } 766 EXPORT_SYMBOL(ib_destroy_srq); 767 768 /* Queue pairs */ 769 770 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) 771 { 772 struct ib_qp *qp = context; 773 unsigned long flags; 774 775 spin_lock_irqsave(&qp->device->event_handler_lock, flags); 776 list_for_each_entry(event->element.qp, &qp->open_list, open_list) 777 if (event->element.qp->event_handler) 778 event->element.qp->event_handler(event, event->element.qp->qp_context); 779 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags); 780 } 781 782 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) 783 { 784 mutex_lock(&xrcd->tgt_qp_mutex); 785 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list); 786 mutex_unlock(&xrcd->tgt_qp_mutex); 787 } 788 789 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, 790 void (*event_handler)(struct ib_event *, void *), 791 void *qp_context) 792 { 793 struct ib_qp *qp; 794 unsigned long flags; 795 int err; 796 797 qp = kzalloc(sizeof *qp, GFP_KERNEL); 798 if (!qp) 799 return ERR_PTR(-ENOMEM); 800 801 qp->real_qp = real_qp; 802 err = ib_open_shared_qp_security(qp, real_qp->device); 803 if (err) { 804 kfree(qp); 805 return ERR_PTR(err); 806 } 807 808 qp->real_qp = real_qp; 809 atomic_inc(&real_qp->usecnt); 810 qp->device = real_qp->device; 811 qp->event_handler = event_handler; 812 qp->qp_context = qp_context; 813 qp->qp_num = real_qp->qp_num; 814 qp->qp_type = real_qp->qp_type; 815 816 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 817 list_add(&qp->open_list, &real_qp->open_list); 818 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 819 820 return qp; 821 } 822 823 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, 824 struct ib_qp_open_attr *qp_open_attr) 825 { 826 struct ib_qp *qp, *real_qp; 827 828 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) 829 return ERR_PTR(-EINVAL); 830 831 qp = ERR_PTR(-EINVAL); 832 mutex_lock(&xrcd->tgt_qp_mutex); 833 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) { 834 if (real_qp->qp_num == qp_open_attr->qp_num) { 835 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, 836 qp_open_attr->qp_context); 837 break; 838 } 839 } 840 mutex_unlock(&xrcd->tgt_qp_mutex); 841 return qp; 842 } 843 EXPORT_SYMBOL(ib_open_qp); 844 845 static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp, 846 struct ib_qp_init_attr *qp_init_attr) 847 { 848 struct ib_qp *real_qp = qp; 849 850 qp->event_handler = __ib_shared_qp_event_handler; 851 qp->qp_context = qp; 852 qp->pd = NULL; 853 qp->send_cq = qp->recv_cq = NULL; 854 qp->srq = NULL; 855 qp->xrcd = qp_init_attr->xrcd; 856 atomic_inc(&qp_init_attr->xrcd->usecnt); 857 INIT_LIST_HEAD(&qp->open_list); 858 859 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler, 860 qp_init_attr->qp_context); 861 if (!IS_ERR(qp)) 862 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); 863 else 864 real_qp->device->destroy_qp(real_qp); 865 return qp; 866 } 867 868 struct ib_qp *ib_create_qp(struct ib_pd *pd, 869 struct ib_qp_init_attr *qp_init_attr) 870 { 871 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device; 872 struct ib_qp *qp; 873 int ret; 874 875 if (qp_init_attr->rwq_ind_tbl && 876 (qp_init_attr->recv_cq || 877 qp_init_attr->srq || qp_init_attr->cap.max_recv_wr || 878 qp_init_attr->cap.max_recv_sge)) 879 return ERR_PTR(-EINVAL); 880 881 /* 882 * If the callers is using the RDMA API calculate the resources 883 * needed for the RDMA READ/WRITE operations. 884 * 885 * Note that these callers need to pass in a port number. 886 */ 887 if (qp_init_attr->cap.max_rdma_ctxs) 888 rdma_rw_init_qp(device, qp_init_attr); 889 890 qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL); 891 if (IS_ERR(qp)) 892 return qp; 893 894 ret = ib_create_qp_security(qp, device); 895 if (ret) { 896 ib_destroy_qp(qp); 897 return ERR_PTR(ret); 898 } 899 900 qp->real_qp = qp; 901 qp->qp_type = qp_init_attr->qp_type; 902 qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl; 903 904 atomic_set(&qp->usecnt, 0); 905 qp->mrs_used = 0; 906 spin_lock_init(&qp->mr_lock); 907 INIT_LIST_HEAD(&qp->rdma_mrs); 908 INIT_LIST_HEAD(&qp->sig_mrs); 909 qp->port = 0; 910 911 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) 912 return ib_create_xrc_qp(qp, qp_init_attr); 913 914 qp->event_handler = qp_init_attr->event_handler; 915 qp->qp_context = qp_init_attr->qp_context; 916 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { 917 qp->recv_cq = NULL; 918 qp->srq = NULL; 919 } else { 920 qp->recv_cq = qp_init_attr->recv_cq; 921 if (qp_init_attr->recv_cq) 922 atomic_inc(&qp_init_attr->recv_cq->usecnt); 923 qp->srq = qp_init_attr->srq; 924 if (qp->srq) 925 atomic_inc(&qp_init_attr->srq->usecnt); 926 } 927 928 qp->send_cq = qp_init_attr->send_cq; 929 qp->xrcd = NULL; 930 931 atomic_inc(&pd->usecnt); 932 if (qp_init_attr->send_cq) 933 atomic_inc(&qp_init_attr->send_cq->usecnt); 934 if (qp_init_attr->rwq_ind_tbl) 935 atomic_inc(&qp->rwq_ind_tbl->usecnt); 936 937 if (qp_init_attr->cap.max_rdma_ctxs) { 938 ret = rdma_rw_init_mrs(qp, qp_init_attr); 939 if (ret) { 940 pr_err("failed to init MR pool ret= %d\n", ret); 941 ib_destroy_qp(qp); 942 return ERR_PTR(ret); 943 } 944 } 945 946 /* 947 * Note: all hw drivers guarantee that max_send_sge is lower than 948 * the device RDMA WRITE SGE limit but not all hw drivers ensure that 949 * max_send_sge <= max_sge_rd. 950 */ 951 qp->max_write_sge = qp_init_attr->cap.max_send_sge; 952 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge, 953 device->attrs.max_sge_rd); 954 955 return qp; 956 } 957 EXPORT_SYMBOL(ib_create_qp); 958 959 static const struct { 960 int valid; 961 enum ib_qp_attr_mask req_param[IB_QPT_MAX]; 962 enum ib_qp_attr_mask opt_param[IB_QPT_MAX]; 963 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 964 [IB_QPS_RESET] = { 965 [IB_QPS_RESET] = { .valid = 1 }, 966 [IB_QPS_INIT] = { 967 .valid = 1, 968 .req_param = { 969 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 970 IB_QP_PORT | 971 IB_QP_QKEY), 972 [IB_QPT_RAW_PACKET] = IB_QP_PORT, 973 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 974 IB_QP_PORT | 975 IB_QP_ACCESS_FLAGS), 976 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 977 IB_QP_PORT | 978 IB_QP_ACCESS_FLAGS), 979 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 980 IB_QP_PORT | 981 IB_QP_ACCESS_FLAGS), 982 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 983 IB_QP_PORT | 984 IB_QP_ACCESS_FLAGS), 985 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 986 IB_QP_QKEY), 987 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 988 IB_QP_QKEY), 989 } 990 }, 991 }, 992 [IB_QPS_INIT] = { 993 [IB_QPS_RESET] = { .valid = 1 }, 994 [IB_QPS_ERR] = { .valid = 1 }, 995 [IB_QPS_INIT] = { 996 .valid = 1, 997 .opt_param = { 998 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 999 IB_QP_PORT | 1000 IB_QP_QKEY), 1001 [IB_QPT_UC] = (IB_QP_PKEY_INDEX | 1002 IB_QP_PORT | 1003 IB_QP_ACCESS_FLAGS), 1004 [IB_QPT_RC] = (IB_QP_PKEY_INDEX | 1005 IB_QP_PORT | 1006 IB_QP_ACCESS_FLAGS), 1007 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX | 1008 IB_QP_PORT | 1009 IB_QP_ACCESS_FLAGS), 1010 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX | 1011 IB_QP_PORT | 1012 IB_QP_ACCESS_FLAGS), 1013 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1014 IB_QP_QKEY), 1015 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1016 IB_QP_QKEY), 1017 } 1018 }, 1019 [IB_QPS_RTR] = { 1020 .valid = 1, 1021 .req_param = { 1022 [IB_QPT_UC] = (IB_QP_AV | 1023 IB_QP_PATH_MTU | 1024 IB_QP_DEST_QPN | 1025 IB_QP_RQ_PSN), 1026 [IB_QPT_RC] = (IB_QP_AV | 1027 IB_QP_PATH_MTU | 1028 IB_QP_DEST_QPN | 1029 IB_QP_RQ_PSN | 1030 IB_QP_MAX_DEST_RD_ATOMIC | 1031 IB_QP_MIN_RNR_TIMER), 1032 [IB_QPT_XRC_INI] = (IB_QP_AV | 1033 IB_QP_PATH_MTU | 1034 IB_QP_DEST_QPN | 1035 IB_QP_RQ_PSN), 1036 [IB_QPT_XRC_TGT] = (IB_QP_AV | 1037 IB_QP_PATH_MTU | 1038 IB_QP_DEST_QPN | 1039 IB_QP_RQ_PSN | 1040 IB_QP_MAX_DEST_RD_ATOMIC | 1041 IB_QP_MIN_RNR_TIMER), 1042 }, 1043 .opt_param = { 1044 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1045 IB_QP_QKEY), 1046 [IB_QPT_UC] = (IB_QP_ALT_PATH | 1047 IB_QP_ACCESS_FLAGS | 1048 IB_QP_PKEY_INDEX), 1049 [IB_QPT_RC] = (IB_QP_ALT_PATH | 1050 IB_QP_ACCESS_FLAGS | 1051 IB_QP_PKEY_INDEX), 1052 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH | 1053 IB_QP_ACCESS_FLAGS | 1054 IB_QP_PKEY_INDEX), 1055 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH | 1056 IB_QP_ACCESS_FLAGS | 1057 IB_QP_PKEY_INDEX), 1058 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1059 IB_QP_QKEY), 1060 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1061 IB_QP_QKEY), 1062 }, 1063 }, 1064 }, 1065 [IB_QPS_RTR] = { 1066 [IB_QPS_RESET] = { .valid = 1 }, 1067 [IB_QPS_ERR] = { .valid = 1 }, 1068 [IB_QPS_RTS] = { 1069 .valid = 1, 1070 .req_param = { 1071 [IB_QPT_UD] = IB_QP_SQ_PSN, 1072 [IB_QPT_UC] = IB_QP_SQ_PSN, 1073 [IB_QPT_RC] = (IB_QP_TIMEOUT | 1074 IB_QP_RETRY_CNT | 1075 IB_QP_RNR_RETRY | 1076 IB_QP_SQ_PSN | 1077 IB_QP_MAX_QP_RD_ATOMIC), 1078 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT | 1079 IB_QP_RETRY_CNT | 1080 IB_QP_RNR_RETRY | 1081 IB_QP_SQ_PSN | 1082 IB_QP_MAX_QP_RD_ATOMIC), 1083 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT | 1084 IB_QP_SQ_PSN), 1085 [IB_QPT_SMI] = IB_QP_SQ_PSN, 1086 [IB_QPT_GSI] = IB_QP_SQ_PSN, 1087 }, 1088 .opt_param = { 1089 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1090 IB_QP_QKEY), 1091 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1092 IB_QP_ALT_PATH | 1093 IB_QP_ACCESS_FLAGS | 1094 IB_QP_PATH_MIG_STATE), 1095 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1096 IB_QP_ALT_PATH | 1097 IB_QP_ACCESS_FLAGS | 1098 IB_QP_MIN_RNR_TIMER | 1099 IB_QP_PATH_MIG_STATE), 1100 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1101 IB_QP_ALT_PATH | 1102 IB_QP_ACCESS_FLAGS | 1103 IB_QP_PATH_MIG_STATE), 1104 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1105 IB_QP_ALT_PATH | 1106 IB_QP_ACCESS_FLAGS | 1107 IB_QP_MIN_RNR_TIMER | 1108 IB_QP_PATH_MIG_STATE), 1109 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1110 IB_QP_QKEY), 1111 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1112 IB_QP_QKEY), 1113 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1114 } 1115 } 1116 }, 1117 [IB_QPS_RTS] = { 1118 [IB_QPS_RESET] = { .valid = 1 }, 1119 [IB_QPS_ERR] = { .valid = 1 }, 1120 [IB_QPS_RTS] = { 1121 .valid = 1, 1122 .opt_param = { 1123 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1124 IB_QP_QKEY), 1125 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1126 IB_QP_ACCESS_FLAGS | 1127 IB_QP_ALT_PATH | 1128 IB_QP_PATH_MIG_STATE), 1129 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1130 IB_QP_ACCESS_FLAGS | 1131 IB_QP_ALT_PATH | 1132 IB_QP_PATH_MIG_STATE | 1133 IB_QP_MIN_RNR_TIMER), 1134 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1135 IB_QP_ACCESS_FLAGS | 1136 IB_QP_ALT_PATH | 1137 IB_QP_PATH_MIG_STATE), 1138 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1139 IB_QP_ACCESS_FLAGS | 1140 IB_QP_ALT_PATH | 1141 IB_QP_PATH_MIG_STATE | 1142 IB_QP_MIN_RNR_TIMER), 1143 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1144 IB_QP_QKEY), 1145 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1146 IB_QP_QKEY), 1147 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT, 1148 } 1149 }, 1150 [IB_QPS_SQD] = { 1151 .valid = 1, 1152 .opt_param = { 1153 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1154 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1155 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1156 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1157 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */ 1158 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY, 1159 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY 1160 } 1161 }, 1162 }, 1163 [IB_QPS_SQD] = { 1164 [IB_QPS_RESET] = { .valid = 1 }, 1165 [IB_QPS_ERR] = { .valid = 1 }, 1166 [IB_QPS_RTS] = { 1167 .valid = 1, 1168 .opt_param = { 1169 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1170 IB_QP_QKEY), 1171 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1172 IB_QP_ALT_PATH | 1173 IB_QP_ACCESS_FLAGS | 1174 IB_QP_PATH_MIG_STATE), 1175 [IB_QPT_RC] = (IB_QP_CUR_STATE | 1176 IB_QP_ALT_PATH | 1177 IB_QP_ACCESS_FLAGS | 1178 IB_QP_MIN_RNR_TIMER | 1179 IB_QP_PATH_MIG_STATE), 1180 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE | 1181 IB_QP_ALT_PATH | 1182 IB_QP_ACCESS_FLAGS | 1183 IB_QP_PATH_MIG_STATE), 1184 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE | 1185 IB_QP_ALT_PATH | 1186 IB_QP_ACCESS_FLAGS | 1187 IB_QP_MIN_RNR_TIMER | 1188 IB_QP_PATH_MIG_STATE), 1189 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1190 IB_QP_QKEY), 1191 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1192 IB_QP_QKEY), 1193 } 1194 }, 1195 [IB_QPS_SQD] = { 1196 .valid = 1, 1197 .opt_param = { 1198 [IB_QPT_UD] = (IB_QP_PKEY_INDEX | 1199 IB_QP_QKEY), 1200 [IB_QPT_UC] = (IB_QP_AV | 1201 IB_QP_ALT_PATH | 1202 IB_QP_ACCESS_FLAGS | 1203 IB_QP_PKEY_INDEX | 1204 IB_QP_PATH_MIG_STATE), 1205 [IB_QPT_RC] = (IB_QP_PORT | 1206 IB_QP_AV | 1207 IB_QP_TIMEOUT | 1208 IB_QP_RETRY_CNT | 1209 IB_QP_RNR_RETRY | 1210 IB_QP_MAX_QP_RD_ATOMIC | 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_XRC_INI] = (IB_QP_PORT | 1218 IB_QP_AV | 1219 IB_QP_TIMEOUT | 1220 IB_QP_RETRY_CNT | 1221 IB_QP_RNR_RETRY | 1222 IB_QP_MAX_QP_RD_ATOMIC | 1223 IB_QP_ALT_PATH | 1224 IB_QP_ACCESS_FLAGS | 1225 IB_QP_PKEY_INDEX | 1226 IB_QP_PATH_MIG_STATE), 1227 [IB_QPT_XRC_TGT] = (IB_QP_PORT | 1228 IB_QP_AV | 1229 IB_QP_TIMEOUT | 1230 IB_QP_MAX_DEST_RD_ATOMIC | 1231 IB_QP_ALT_PATH | 1232 IB_QP_ACCESS_FLAGS | 1233 IB_QP_PKEY_INDEX | 1234 IB_QP_MIN_RNR_TIMER | 1235 IB_QP_PATH_MIG_STATE), 1236 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | 1237 IB_QP_QKEY), 1238 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | 1239 IB_QP_QKEY), 1240 } 1241 } 1242 }, 1243 [IB_QPS_SQE] = { 1244 [IB_QPS_RESET] = { .valid = 1 }, 1245 [IB_QPS_ERR] = { .valid = 1 }, 1246 [IB_QPS_RTS] = { 1247 .valid = 1, 1248 .opt_param = { 1249 [IB_QPT_UD] = (IB_QP_CUR_STATE | 1250 IB_QP_QKEY), 1251 [IB_QPT_UC] = (IB_QP_CUR_STATE | 1252 IB_QP_ACCESS_FLAGS), 1253 [IB_QPT_SMI] = (IB_QP_CUR_STATE | 1254 IB_QP_QKEY), 1255 [IB_QPT_GSI] = (IB_QP_CUR_STATE | 1256 IB_QP_QKEY), 1257 } 1258 } 1259 }, 1260 [IB_QPS_ERR] = { 1261 [IB_QPS_RESET] = { .valid = 1 }, 1262 [IB_QPS_ERR] = { .valid = 1 } 1263 } 1264 }; 1265 1266 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state, 1267 enum ib_qp_type type, enum ib_qp_attr_mask mask, 1268 enum rdma_link_layer ll) 1269 { 1270 enum ib_qp_attr_mask req_param, opt_param; 1271 1272 if (mask & IB_QP_CUR_STATE && 1273 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 1274 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 1275 return false; 1276 1277 if (!qp_state_table[cur_state][next_state].valid) 1278 return false; 1279 1280 req_param = qp_state_table[cur_state][next_state].req_param[type]; 1281 opt_param = qp_state_table[cur_state][next_state].opt_param[type]; 1282 1283 if ((mask & req_param) != req_param) 1284 return false; 1285 1286 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 1287 return false; 1288 1289 return true; 1290 } 1291 EXPORT_SYMBOL(ib_modify_qp_is_ok); 1292 1293 static int ib_resolve_eth_dmac(struct ib_device *device, 1294 struct rdma_ah_attr *ah_attr) 1295 { 1296 int ret = 0; 1297 struct ib_global_route *grh; 1298 1299 if (!rdma_is_port_valid(device, rdma_ah_get_port_num(ah_attr))) 1300 return -EINVAL; 1301 1302 grh = rdma_ah_retrieve_grh(ah_attr); 1303 1304 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1305 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) { 1306 __be32 addr = 0; 1307 1308 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4); 1309 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac); 1310 } else { 1311 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw, 1312 (char *)ah_attr->roce.dmac); 1313 } 1314 } else { 1315 ret = ib_resolve_unicast_gid_dmac(device, ah_attr); 1316 } 1317 return ret; 1318 } 1319 1320 /** 1321 * IB core internal function to perform QP attributes modification. 1322 */ 1323 static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr, 1324 int attr_mask, struct ib_udata *udata) 1325 { 1326 u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; 1327 int ret; 1328 1329 if (rdma_ib_or_roce(qp->device, port)) { 1330 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) { 1331 pr_warn("%s: %s rq_psn overflow, masking to 24 bits\n", 1332 __func__, qp->device->name); 1333 attr->rq_psn &= 0xffffff; 1334 } 1335 1336 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) { 1337 pr_warn("%s: %s sq_psn overflow, masking to 24 bits\n", 1338 __func__, qp->device->name); 1339 attr->sq_psn &= 0xffffff; 1340 } 1341 } 1342 1343 ret = ib_security_modify_qp(qp, attr, attr_mask, udata); 1344 if (!ret && (attr_mask & IB_QP_PORT)) 1345 qp->port = attr->port_num; 1346 1347 return ret; 1348 } 1349 1350 static bool is_qp_type_connected(const struct ib_qp *qp) 1351 { 1352 return (qp->qp_type == IB_QPT_UC || 1353 qp->qp_type == IB_QPT_RC || 1354 qp->qp_type == IB_QPT_XRC_INI || 1355 qp->qp_type == IB_QPT_XRC_TGT); 1356 } 1357 1358 /** 1359 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP. 1360 * @ib_qp: The QP to modify. 1361 * @attr: On input, specifies the QP attributes to modify. On output, 1362 * the current values of selected QP attributes are returned. 1363 * @attr_mask: A bit-mask used to specify which attributes of the QP 1364 * are being modified. 1365 * @udata: pointer to user's input output buffer information 1366 * are being modified. 1367 * It returns 0 on success and returns appropriate error code on error. 1368 */ 1369 int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr, 1370 int attr_mask, struct ib_udata *udata) 1371 { 1372 struct ib_qp *qp = ib_qp->real_qp; 1373 int ret; 1374 1375 if (attr_mask & IB_QP_AV && 1376 attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE && 1377 is_qp_type_connected(qp)) { 1378 ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr); 1379 if (ret) 1380 return ret; 1381 } 1382 return _ib_modify_qp(qp, attr, attr_mask, udata); 1383 } 1384 EXPORT_SYMBOL(ib_modify_qp_with_udata); 1385 1386 int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width) 1387 { 1388 int rc; 1389 u32 netdev_speed; 1390 struct net_device *netdev; 1391 struct ethtool_link_ksettings lksettings; 1392 1393 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET) 1394 return -EINVAL; 1395 1396 if (!dev->get_netdev) 1397 return -EOPNOTSUPP; 1398 1399 netdev = dev->get_netdev(dev, port_num); 1400 if (!netdev) 1401 return -ENODEV; 1402 1403 rtnl_lock(); 1404 rc = __ethtool_get_link_ksettings(netdev, &lksettings); 1405 rtnl_unlock(); 1406 1407 dev_put(netdev); 1408 1409 if (!rc) { 1410 netdev_speed = lksettings.base.speed; 1411 } else { 1412 netdev_speed = SPEED_1000; 1413 pr_warn("%s speed is unknown, defaulting to %d\n", netdev->name, 1414 netdev_speed); 1415 } 1416 1417 if (netdev_speed <= SPEED_1000) { 1418 *width = IB_WIDTH_1X; 1419 *speed = IB_SPEED_SDR; 1420 } else if (netdev_speed <= SPEED_10000) { 1421 *width = IB_WIDTH_1X; 1422 *speed = IB_SPEED_FDR10; 1423 } else if (netdev_speed <= SPEED_20000) { 1424 *width = IB_WIDTH_4X; 1425 *speed = IB_SPEED_DDR; 1426 } else if (netdev_speed <= SPEED_25000) { 1427 *width = IB_WIDTH_1X; 1428 *speed = IB_SPEED_EDR; 1429 } else if (netdev_speed <= SPEED_40000) { 1430 *width = IB_WIDTH_4X; 1431 *speed = IB_SPEED_FDR10; 1432 } else { 1433 *width = IB_WIDTH_4X; 1434 *speed = IB_SPEED_EDR; 1435 } 1436 1437 return 0; 1438 } 1439 EXPORT_SYMBOL(ib_get_eth_speed); 1440 1441 int ib_modify_qp(struct ib_qp *qp, 1442 struct ib_qp_attr *qp_attr, 1443 int qp_attr_mask) 1444 { 1445 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL); 1446 } 1447 EXPORT_SYMBOL(ib_modify_qp); 1448 1449 int ib_query_qp(struct ib_qp *qp, 1450 struct ib_qp_attr *qp_attr, 1451 int qp_attr_mask, 1452 struct ib_qp_init_attr *qp_init_attr) 1453 { 1454 return qp->device->query_qp ? 1455 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) : 1456 -EOPNOTSUPP; 1457 } 1458 EXPORT_SYMBOL(ib_query_qp); 1459 1460 int ib_close_qp(struct ib_qp *qp) 1461 { 1462 struct ib_qp *real_qp; 1463 unsigned long flags; 1464 1465 real_qp = qp->real_qp; 1466 if (real_qp == qp) 1467 return -EINVAL; 1468 1469 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags); 1470 list_del(&qp->open_list); 1471 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags); 1472 1473 atomic_dec(&real_qp->usecnt); 1474 if (qp->qp_sec) 1475 ib_close_shared_qp_security(qp->qp_sec); 1476 kfree(qp); 1477 1478 return 0; 1479 } 1480 EXPORT_SYMBOL(ib_close_qp); 1481 1482 static int __ib_destroy_shared_qp(struct ib_qp *qp) 1483 { 1484 struct ib_xrcd *xrcd; 1485 struct ib_qp *real_qp; 1486 int ret; 1487 1488 real_qp = qp->real_qp; 1489 xrcd = real_qp->xrcd; 1490 1491 mutex_lock(&xrcd->tgt_qp_mutex); 1492 ib_close_qp(qp); 1493 if (atomic_read(&real_qp->usecnt) == 0) 1494 list_del(&real_qp->xrcd_list); 1495 else 1496 real_qp = NULL; 1497 mutex_unlock(&xrcd->tgt_qp_mutex); 1498 1499 if (real_qp) { 1500 ret = ib_destroy_qp(real_qp); 1501 if (!ret) 1502 atomic_dec(&xrcd->usecnt); 1503 else 1504 __ib_insert_xrcd_qp(xrcd, real_qp); 1505 } 1506 1507 return 0; 1508 } 1509 1510 int ib_destroy_qp(struct ib_qp *qp) 1511 { 1512 struct ib_pd *pd; 1513 struct ib_cq *scq, *rcq; 1514 struct ib_srq *srq; 1515 struct ib_rwq_ind_table *ind_tbl; 1516 struct ib_qp_security *sec; 1517 int ret; 1518 1519 WARN_ON_ONCE(qp->mrs_used > 0); 1520 1521 if (atomic_read(&qp->usecnt)) 1522 return -EBUSY; 1523 1524 if (qp->real_qp != qp) 1525 return __ib_destroy_shared_qp(qp); 1526 1527 pd = qp->pd; 1528 scq = qp->send_cq; 1529 rcq = qp->recv_cq; 1530 srq = qp->srq; 1531 ind_tbl = qp->rwq_ind_tbl; 1532 sec = qp->qp_sec; 1533 if (sec) 1534 ib_destroy_qp_security_begin(sec); 1535 1536 if (!qp->uobject) 1537 rdma_rw_cleanup_mrs(qp); 1538 1539 rdma_restrack_del(&qp->res); 1540 ret = qp->device->destroy_qp(qp); 1541 if (!ret) { 1542 if (pd) 1543 atomic_dec(&pd->usecnt); 1544 if (scq) 1545 atomic_dec(&scq->usecnt); 1546 if (rcq) 1547 atomic_dec(&rcq->usecnt); 1548 if (srq) 1549 atomic_dec(&srq->usecnt); 1550 if (ind_tbl) 1551 atomic_dec(&ind_tbl->usecnt); 1552 if (sec) 1553 ib_destroy_qp_security_end(sec); 1554 } else { 1555 if (sec) 1556 ib_destroy_qp_security_abort(sec); 1557 } 1558 1559 return ret; 1560 } 1561 EXPORT_SYMBOL(ib_destroy_qp); 1562 1563 /* Completion queues */ 1564 1565 struct ib_cq *__ib_create_cq(struct ib_device *device, 1566 ib_comp_handler comp_handler, 1567 void (*event_handler)(struct ib_event *, void *), 1568 void *cq_context, 1569 const struct ib_cq_init_attr *cq_attr, 1570 const char *caller) 1571 { 1572 struct ib_cq *cq; 1573 1574 cq = device->create_cq(device, cq_attr, NULL, NULL); 1575 1576 if (!IS_ERR(cq)) { 1577 cq->device = device; 1578 cq->uobject = NULL; 1579 cq->comp_handler = comp_handler; 1580 cq->event_handler = event_handler; 1581 cq->cq_context = cq_context; 1582 atomic_set(&cq->usecnt, 0); 1583 cq->res.type = RDMA_RESTRACK_CQ; 1584 cq->res.kern_name = caller; 1585 rdma_restrack_add(&cq->res); 1586 } 1587 1588 return cq; 1589 } 1590 EXPORT_SYMBOL(__ib_create_cq); 1591 1592 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period) 1593 { 1594 return cq->device->modify_cq ? 1595 cq->device->modify_cq(cq, cq_count, cq_period) : -EOPNOTSUPP; 1596 } 1597 EXPORT_SYMBOL(rdma_set_cq_moderation); 1598 1599 int ib_destroy_cq(struct ib_cq *cq) 1600 { 1601 if (atomic_read(&cq->usecnt)) 1602 return -EBUSY; 1603 1604 rdma_restrack_del(&cq->res); 1605 return cq->device->destroy_cq(cq); 1606 } 1607 EXPORT_SYMBOL(ib_destroy_cq); 1608 1609 int ib_resize_cq(struct ib_cq *cq, int cqe) 1610 { 1611 return cq->device->resize_cq ? 1612 cq->device->resize_cq(cq, cqe, NULL) : -EOPNOTSUPP; 1613 } 1614 EXPORT_SYMBOL(ib_resize_cq); 1615 1616 /* Memory regions */ 1617 1618 int ib_dereg_mr(struct ib_mr *mr) 1619 { 1620 struct ib_pd *pd = mr->pd; 1621 struct ib_dm *dm = mr->dm; 1622 int ret; 1623 1624 rdma_restrack_del(&mr->res); 1625 ret = mr->device->dereg_mr(mr); 1626 if (!ret) { 1627 atomic_dec(&pd->usecnt); 1628 if (dm) 1629 atomic_dec(&dm->usecnt); 1630 } 1631 1632 return ret; 1633 } 1634 EXPORT_SYMBOL(ib_dereg_mr); 1635 1636 /** 1637 * ib_alloc_mr() - Allocates a memory region 1638 * @pd: protection domain associated with the region 1639 * @mr_type: memory region type 1640 * @max_num_sg: maximum sg entries available for registration. 1641 * 1642 * Notes: 1643 * Memory registeration page/sg lists must not exceed max_num_sg. 1644 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed 1645 * max_num_sg * used_page_size. 1646 * 1647 */ 1648 struct ib_mr *ib_alloc_mr(struct ib_pd *pd, 1649 enum ib_mr_type mr_type, 1650 u32 max_num_sg) 1651 { 1652 struct ib_mr *mr; 1653 1654 if (!pd->device->alloc_mr) 1655 return ERR_PTR(-EOPNOTSUPP); 1656 1657 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg); 1658 if (!IS_ERR(mr)) { 1659 mr->device = pd->device; 1660 mr->pd = pd; 1661 mr->dm = NULL; 1662 mr->uobject = NULL; 1663 atomic_inc(&pd->usecnt); 1664 mr->need_inval = false; 1665 mr->res.type = RDMA_RESTRACK_MR; 1666 rdma_restrack_add(&mr->res); 1667 } 1668 1669 return mr; 1670 } 1671 EXPORT_SYMBOL(ib_alloc_mr); 1672 1673 /* "Fast" memory regions */ 1674 1675 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, 1676 int mr_access_flags, 1677 struct ib_fmr_attr *fmr_attr) 1678 { 1679 struct ib_fmr *fmr; 1680 1681 if (!pd->device->alloc_fmr) 1682 return ERR_PTR(-EOPNOTSUPP); 1683 1684 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); 1685 if (!IS_ERR(fmr)) { 1686 fmr->device = pd->device; 1687 fmr->pd = pd; 1688 atomic_inc(&pd->usecnt); 1689 } 1690 1691 return fmr; 1692 } 1693 EXPORT_SYMBOL(ib_alloc_fmr); 1694 1695 int ib_unmap_fmr(struct list_head *fmr_list) 1696 { 1697 struct ib_fmr *fmr; 1698 1699 if (list_empty(fmr_list)) 1700 return 0; 1701 1702 fmr = list_entry(fmr_list->next, struct ib_fmr, list); 1703 return fmr->device->unmap_fmr(fmr_list); 1704 } 1705 EXPORT_SYMBOL(ib_unmap_fmr); 1706 1707 int ib_dealloc_fmr(struct ib_fmr *fmr) 1708 { 1709 struct ib_pd *pd; 1710 int ret; 1711 1712 pd = fmr->pd; 1713 ret = fmr->device->dealloc_fmr(fmr); 1714 if (!ret) 1715 atomic_dec(&pd->usecnt); 1716 1717 return ret; 1718 } 1719 EXPORT_SYMBOL(ib_dealloc_fmr); 1720 1721 /* Multicast groups */ 1722 1723 static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid) 1724 { 1725 struct ib_qp_init_attr init_attr = {}; 1726 struct ib_qp_attr attr = {}; 1727 int num_eth_ports = 0; 1728 int port; 1729 1730 /* If QP state >= init, it is assigned to a port and we can check this 1731 * port only. 1732 */ 1733 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) { 1734 if (attr.qp_state >= IB_QPS_INIT) { 1735 if (rdma_port_get_link_layer(qp->device, attr.port_num) != 1736 IB_LINK_LAYER_INFINIBAND) 1737 return true; 1738 goto lid_check; 1739 } 1740 } 1741 1742 /* Can't get a quick answer, iterate over all ports */ 1743 for (port = 0; port < qp->device->phys_port_cnt; port++) 1744 if (rdma_port_get_link_layer(qp->device, port) != 1745 IB_LINK_LAYER_INFINIBAND) 1746 num_eth_ports++; 1747 1748 /* If we have at lease one Ethernet port, RoCE annex declares that 1749 * multicast LID should be ignored. We can't tell at this step if the 1750 * QP belongs to an IB or Ethernet port. 1751 */ 1752 if (num_eth_ports) 1753 return true; 1754 1755 /* If all the ports are IB, we can check according to IB spec. */ 1756 lid_check: 1757 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || 1758 lid == be16_to_cpu(IB_LID_PERMISSIVE)); 1759 } 1760 1761 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1762 { 1763 int ret; 1764 1765 if (!qp->device->attach_mcast) 1766 return -EOPNOTSUPP; 1767 1768 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 1769 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 1770 return -EINVAL; 1771 1772 ret = qp->device->attach_mcast(qp, gid, lid); 1773 if (!ret) 1774 atomic_inc(&qp->usecnt); 1775 return ret; 1776 } 1777 EXPORT_SYMBOL(ib_attach_mcast); 1778 1779 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) 1780 { 1781 int ret; 1782 1783 if (!qp->device->detach_mcast) 1784 return -EOPNOTSUPP; 1785 1786 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || 1787 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) 1788 return -EINVAL; 1789 1790 ret = qp->device->detach_mcast(qp, gid, lid); 1791 if (!ret) 1792 atomic_dec(&qp->usecnt); 1793 return ret; 1794 } 1795 EXPORT_SYMBOL(ib_detach_mcast); 1796 1797 struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller) 1798 { 1799 struct ib_xrcd *xrcd; 1800 1801 if (!device->alloc_xrcd) 1802 return ERR_PTR(-EOPNOTSUPP); 1803 1804 xrcd = device->alloc_xrcd(device, NULL, NULL); 1805 if (!IS_ERR(xrcd)) { 1806 xrcd->device = device; 1807 xrcd->inode = NULL; 1808 atomic_set(&xrcd->usecnt, 0); 1809 mutex_init(&xrcd->tgt_qp_mutex); 1810 INIT_LIST_HEAD(&xrcd->tgt_qp_list); 1811 } 1812 1813 return xrcd; 1814 } 1815 EXPORT_SYMBOL(__ib_alloc_xrcd); 1816 1817 int ib_dealloc_xrcd(struct ib_xrcd *xrcd) 1818 { 1819 struct ib_qp *qp; 1820 int ret; 1821 1822 if (atomic_read(&xrcd->usecnt)) 1823 return -EBUSY; 1824 1825 while (!list_empty(&xrcd->tgt_qp_list)) { 1826 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list); 1827 ret = ib_destroy_qp(qp); 1828 if (ret) 1829 return ret; 1830 } 1831 1832 return xrcd->device->dealloc_xrcd(xrcd); 1833 } 1834 EXPORT_SYMBOL(ib_dealloc_xrcd); 1835 1836 /** 1837 * ib_create_wq - Creates a WQ associated with the specified protection 1838 * domain. 1839 * @pd: The protection domain associated with the WQ. 1840 * @wq_attr: A list of initial attributes required to create the 1841 * WQ. If WQ creation succeeds, then the attributes are updated to 1842 * the actual capabilities of the created WQ. 1843 * 1844 * wq_attr->max_wr and wq_attr->max_sge determine 1845 * the requested size of the WQ, and set to the actual values allocated 1846 * on return. 1847 * If ib_create_wq() succeeds, then max_wr and max_sge will always be 1848 * at least as large as the requested values. 1849 */ 1850 struct ib_wq *ib_create_wq(struct ib_pd *pd, 1851 struct ib_wq_init_attr *wq_attr) 1852 { 1853 struct ib_wq *wq; 1854 1855 if (!pd->device->create_wq) 1856 return ERR_PTR(-EOPNOTSUPP); 1857 1858 wq = pd->device->create_wq(pd, wq_attr, NULL); 1859 if (!IS_ERR(wq)) { 1860 wq->event_handler = wq_attr->event_handler; 1861 wq->wq_context = wq_attr->wq_context; 1862 wq->wq_type = wq_attr->wq_type; 1863 wq->cq = wq_attr->cq; 1864 wq->device = pd->device; 1865 wq->pd = pd; 1866 wq->uobject = NULL; 1867 atomic_inc(&pd->usecnt); 1868 atomic_inc(&wq_attr->cq->usecnt); 1869 atomic_set(&wq->usecnt, 0); 1870 } 1871 return wq; 1872 } 1873 EXPORT_SYMBOL(ib_create_wq); 1874 1875 /** 1876 * ib_destroy_wq - Destroys the specified WQ. 1877 * @wq: The WQ to destroy. 1878 */ 1879 int ib_destroy_wq(struct ib_wq *wq) 1880 { 1881 int err; 1882 struct ib_cq *cq = wq->cq; 1883 struct ib_pd *pd = wq->pd; 1884 1885 if (atomic_read(&wq->usecnt)) 1886 return -EBUSY; 1887 1888 err = wq->device->destroy_wq(wq); 1889 if (!err) { 1890 atomic_dec(&pd->usecnt); 1891 atomic_dec(&cq->usecnt); 1892 } 1893 return err; 1894 } 1895 EXPORT_SYMBOL(ib_destroy_wq); 1896 1897 /** 1898 * ib_modify_wq - Modifies the specified WQ. 1899 * @wq: The WQ to modify. 1900 * @wq_attr: On input, specifies the WQ attributes to modify. 1901 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ 1902 * are being modified. 1903 * On output, the current values of selected WQ attributes are returned. 1904 */ 1905 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr, 1906 u32 wq_attr_mask) 1907 { 1908 int err; 1909 1910 if (!wq->device->modify_wq) 1911 return -EOPNOTSUPP; 1912 1913 err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL); 1914 return err; 1915 } 1916 EXPORT_SYMBOL(ib_modify_wq); 1917 1918 /* 1919 * ib_create_rwq_ind_table - Creates a RQ Indirection Table. 1920 * @device: The device on which to create the rwq indirection table. 1921 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to 1922 * create the Indirection Table. 1923 * 1924 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less 1925 * than the created ib_rwq_ind_table object and the caller is responsible 1926 * for its memory allocation/free. 1927 */ 1928 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device, 1929 struct ib_rwq_ind_table_init_attr *init_attr) 1930 { 1931 struct ib_rwq_ind_table *rwq_ind_table; 1932 int i; 1933 u32 table_size; 1934 1935 if (!device->create_rwq_ind_table) 1936 return ERR_PTR(-EOPNOTSUPP); 1937 1938 table_size = (1 << init_attr->log_ind_tbl_size); 1939 rwq_ind_table = device->create_rwq_ind_table(device, 1940 init_attr, NULL); 1941 if (IS_ERR(rwq_ind_table)) 1942 return rwq_ind_table; 1943 1944 rwq_ind_table->ind_tbl = init_attr->ind_tbl; 1945 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size; 1946 rwq_ind_table->device = device; 1947 rwq_ind_table->uobject = NULL; 1948 atomic_set(&rwq_ind_table->usecnt, 0); 1949 1950 for (i = 0; i < table_size; i++) 1951 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt); 1952 1953 return rwq_ind_table; 1954 } 1955 EXPORT_SYMBOL(ib_create_rwq_ind_table); 1956 1957 /* 1958 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table. 1959 * @wq_ind_table: The Indirection Table to destroy. 1960 */ 1961 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table) 1962 { 1963 int err, i; 1964 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size); 1965 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl; 1966 1967 if (atomic_read(&rwq_ind_table->usecnt)) 1968 return -EBUSY; 1969 1970 err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table); 1971 if (!err) { 1972 for (i = 0; i < table_size; i++) 1973 atomic_dec(&ind_tbl[i]->usecnt); 1974 } 1975 1976 return err; 1977 } 1978 EXPORT_SYMBOL(ib_destroy_rwq_ind_table); 1979 1980 struct ib_flow *ib_create_flow(struct ib_qp *qp, 1981 struct ib_flow_attr *flow_attr, 1982 int domain) 1983 { 1984 struct ib_flow *flow_id; 1985 if (!qp->device->create_flow) 1986 return ERR_PTR(-EOPNOTSUPP); 1987 1988 flow_id = qp->device->create_flow(qp, flow_attr, domain, NULL); 1989 if (!IS_ERR(flow_id)) { 1990 atomic_inc(&qp->usecnt); 1991 flow_id->qp = qp; 1992 } 1993 return flow_id; 1994 } 1995 EXPORT_SYMBOL(ib_create_flow); 1996 1997 int ib_destroy_flow(struct ib_flow *flow_id) 1998 { 1999 int err; 2000 struct ib_qp *qp = flow_id->qp; 2001 2002 err = qp->device->destroy_flow(flow_id); 2003 if (!err) 2004 atomic_dec(&qp->usecnt); 2005 return err; 2006 } 2007 EXPORT_SYMBOL(ib_destroy_flow); 2008 2009 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, 2010 struct ib_mr_status *mr_status) 2011 { 2012 return mr->device->check_mr_status ? 2013 mr->device->check_mr_status(mr, check_mask, mr_status) : -EOPNOTSUPP; 2014 } 2015 EXPORT_SYMBOL(ib_check_mr_status); 2016 2017 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port, 2018 int state) 2019 { 2020 if (!device->set_vf_link_state) 2021 return -EOPNOTSUPP; 2022 2023 return device->set_vf_link_state(device, vf, port, state); 2024 } 2025 EXPORT_SYMBOL(ib_set_vf_link_state); 2026 2027 int ib_get_vf_config(struct ib_device *device, int vf, u8 port, 2028 struct ifla_vf_info *info) 2029 { 2030 if (!device->get_vf_config) 2031 return -EOPNOTSUPP; 2032 2033 return device->get_vf_config(device, vf, port, info); 2034 } 2035 EXPORT_SYMBOL(ib_get_vf_config); 2036 2037 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port, 2038 struct ifla_vf_stats *stats) 2039 { 2040 if (!device->get_vf_stats) 2041 return -EOPNOTSUPP; 2042 2043 return device->get_vf_stats(device, vf, port, stats); 2044 } 2045 EXPORT_SYMBOL(ib_get_vf_stats); 2046 2047 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid, 2048 int type) 2049 { 2050 if (!device->set_vf_guid) 2051 return -EOPNOTSUPP; 2052 2053 return device->set_vf_guid(device, vf, port, guid, type); 2054 } 2055 EXPORT_SYMBOL(ib_set_vf_guid); 2056 2057 /** 2058 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list 2059 * and set it the memory region. 2060 * @mr: memory region 2061 * @sg: dma mapped scatterlist 2062 * @sg_nents: number of entries in sg 2063 * @sg_offset: offset in bytes into sg 2064 * @page_size: page vector desired page size 2065 * 2066 * Constraints: 2067 * - The first sg element is allowed to have an offset. 2068 * - Each sg element must either be aligned to page_size or virtually 2069 * contiguous to the previous element. In case an sg element has a 2070 * non-contiguous offset, the mapping prefix will not include it. 2071 * - The last sg element is allowed to have length less than page_size. 2072 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size 2073 * then only max_num_sg entries will be mapped. 2074 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these 2075 * constraints holds and the page_size argument is ignored. 2076 * 2077 * Returns the number of sg elements that were mapped to the memory region. 2078 * 2079 * After this completes successfully, the memory region 2080 * is ready for registration. 2081 */ 2082 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents, 2083 unsigned int *sg_offset, unsigned int page_size) 2084 { 2085 if (unlikely(!mr->device->map_mr_sg)) 2086 return -EOPNOTSUPP; 2087 2088 mr->page_size = page_size; 2089 2090 return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset); 2091 } 2092 EXPORT_SYMBOL(ib_map_mr_sg); 2093 2094 /** 2095 * ib_sg_to_pages() - Convert the largest prefix of a sg list 2096 * to a page vector 2097 * @mr: memory region 2098 * @sgl: dma mapped scatterlist 2099 * @sg_nents: number of entries in sg 2100 * @sg_offset_p: IN: start offset in bytes into sg 2101 * OUT: offset in bytes for element n of the sg of the first 2102 * byte that has not been processed where n is the return 2103 * value of this function. 2104 * @set_page: driver page assignment function pointer 2105 * 2106 * Core service helper for drivers to convert the largest 2107 * prefix of given sg list to a page vector. The sg list 2108 * prefix converted is the prefix that meet the requirements 2109 * of ib_map_mr_sg. 2110 * 2111 * Returns the number of sg elements that were assigned to 2112 * a page vector. 2113 */ 2114 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents, 2115 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64)) 2116 { 2117 struct scatterlist *sg; 2118 u64 last_end_dma_addr = 0; 2119 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0; 2120 unsigned int last_page_off = 0; 2121 u64 page_mask = ~((u64)mr->page_size - 1); 2122 int i, ret; 2123 2124 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0]))) 2125 return -EINVAL; 2126 2127 mr->iova = sg_dma_address(&sgl[0]) + sg_offset; 2128 mr->length = 0; 2129 2130 for_each_sg(sgl, sg, sg_nents, i) { 2131 u64 dma_addr = sg_dma_address(sg) + sg_offset; 2132 u64 prev_addr = dma_addr; 2133 unsigned int dma_len = sg_dma_len(sg) - sg_offset; 2134 u64 end_dma_addr = dma_addr + dma_len; 2135 u64 page_addr = dma_addr & page_mask; 2136 2137 /* 2138 * For the second and later elements, check whether either the 2139 * end of element i-1 or the start of element i is not aligned 2140 * on a page boundary. 2141 */ 2142 if (i && (last_page_off != 0 || page_addr != dma_addr)) { 2143 /* Stop mapping if there is a gap. */ 2144 if (last_end_dma_addr != dma_addr) 2145 break; 2146 2147 /* 2148 * Coalesce this element with the last. If it is small 2149 * enough just update mr->length. Otherwise start 2150 * mapping from the next page. 2151 */ 2152 goto next_page; 2153 } 2154 2155 do { 2156 ret = set_page(mr, page_addr); 2157 if (unlikely(ret < 0)) { 2158 sg_offset = prev_addr - sg_dma_address(sg); 2159 mr->length += prev_addr - dma_addr; 2160 if (sg_offset_p) 2161 *sg_offset_p = sg_offset; 2162 return i || sg_offset ? i : ret; 2163 } 2164 prev_addr = page_addr; 2165 next_page: 2166 page_addr += mr->page_size; 2167 } while (page_addr < end_dma_addr); 2168 2169 mr->length += dma_len; 2170 last_end_dma_addr = end_dma_addr; 2171 last_page_off = end_dma_addr & ~page_mask; 2172 2173 sg_offset = 0; 2174 } 2175 2176 if (sg_offset_p) 2177 *sg_offset_p = 0; 2178 return i; 2179 } 2180 EXPORT_SYMBOL(ib_sg_to_pages); 2181 2182 struct ib_drain_cqe { 2183 struct ib_cqe cqe; 2184 struct completion done; 2185 }; 2186 2187 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc) 2188 { 2189 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe, 2190 cqe); 2191 2192 complete(&cqe->done); 2193 } 2194 2195 /* 2196 * Post a WR and block until its completion is reaped for the SQ. 2197 */ 2198 static void __ib_drain_sq(struct ib_qp *qp) 2199 { 2200 struct ib_cq *cq = qp->send_cq; 2201 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2202 struct ib_drain_cqe sdrain; 2203 struct ib_send_wr *bad_swr; 2204 struct ib_rdma_wr swr = { 2205 .wr = { 2206 .next = NULL, 2207 { .wr_cqe = &sdrain.cqe, }, 2208 .opcode = IB_WR_RDMA_WRITE, 2209 }, 2210 }; 2211 int ret; 2212 2213 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2214 if (ret) { 2215 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2216 return; 2217 } 2218 2219 sdrain.cqe.done = ib_drain_qp_done; 2220 init_completion(&sdrain.done); 2221 2222 ret = ib_post_send(qp, &swr.wr, &bad_swr); 2223 if (ret) { 2224 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret); 2225 return; 2226 } 2227 2228 if (cq->poll_ctx == IB_POLL_DIRECT) 2229 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0) 2230 ib_process_cq_direct(cq, -1); 2231 else 2232 wait_for_completion(&sdrain.done); 2233 } 2234 2235 /* 2236 * Post a WR and block until its completion is reaped for the RQ. 2237 */ 2238 static void __ib_drain_rq(struct ib_qp *qp) 2239 { 2240 struct ib_cq *cq = qp->recv_cq; 2241 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; 2242 struct ib_drain_cqe rdrain; 2243 struct ib_recv_wr rwr = {}, *bad_rwr; 2244 int ret; 2245 2246 ret = ib_modify_qp(qp, &attr, IB_QP_STATE); 2247 if (ret) { 2248 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2249 return; 2250 } 2251 2252 rwr.wr_cqe = &rdrain.cqe; 2253 rdrain.cqe.done = ib_drain_qp_done; 2254 init_completion(&rdrain.done); 2255 2256 ret = ib_post_recv(qp, &rwr, &bad_rwr); 2257 if (ret) { 2258 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret); 2259 return; 2260 } 2261 2262 if (cq->poll_ctx == IB_POLL_DIRECT) 2263 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0) 2264 ib_process_cq_direct(cq, -1); 2265 else 2266 wait_for_completion(&rdrain.done); 2267 } 2268 2269 /** 2270 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the 2271 * application. 2272 * @qp: queue pair to drain 2273 * 2274 * If the device has a provider-specific drain function, then 2275 * call that. Otherwise call the generic drain function 2276 * __ib_drain_sq(). 2277 * 2278 * The caller must: 2279 * 2280 * ensure there is room in the CQ and SQ for the drain work request and 2281 * completion. 2282 * 2283 * allocate the CQ using ib_alloc_cq(). 2284 * 2285 * ensure that there are no other contexts that are posting WRs concurrently. 2286 * Otherwise the drain is not guaranteed. 2287 */ 2288 void ib_drain_sq(struct ib_qp *qp) 2289 { 2290 if (qp->device->drain_sq) 2291 qp->device->drain_sq(qp); 2292 else 2293 __ib_drain_sq(qp); 2294 } 2295 EXPORT_SYMBOL(ib_drain_sq); 2296 2297 /** 2298 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the 2299 * application. 2300 * @qp: queue pair to drain 2301 * 2302 * If the device has a provider-specific drain function, then 2303 * call that. Otherwise call the generic drain function 2304 * __ib_drain_rq(). 2305 * 2306 * The caller must: 2307 * 2308 * ensure there is room in the CQ and RQ for the drain work request and 2309 * completion. 2310 * 2311 * allocate the CQ using ib_alloc_cq(). 2312 * 2313 * ensure that there are no other contexts that are posting WRs concurrently. 2314 * Otherwise the drain is not guaranteed. 2315 */ 2316 void ib_drain_rq(struct ib_qp *qp) 2317 { 2318 if (qp->device->drain_rq) 2319 qp->device->drain_rq(qp); 2320 else 2321 __ib_drain_rq(qp); 2322 } 2323 EXPORT_SYMBOL(ib_drain_rq); 2324 2325 /** 2326 * ib_drain_qp() - Block until all CQEs have been consumed by the 2327 * application on both the RQ and SQ. 2328 * @qp: queue pair to drain 2329 * 2330 * The caller must: 2331 * 2332 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests 2333 * and completions. 2334 * 2335 * allocate the CQs using ib_alloc_cq(). 2336 * 2337 * ensure that there are no other contexts that are posting WRs concurrently. 2338 * Otherwise the drain is not guaranteed. 2339 */ 2340 void ib_drain_qp(struct ib_qp *qp) 2341 { 2342 ib_drain_sq(qp); 2343 if (!qp->srq) 2344 ib_drain_rq(qp); 2345 } 2346 EXPORT_SYMBOL(ib_drain_qp); 2347