3181 lines · c
1/*2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.4 * Copyright (c) 2004 Intel Corporation. All rights reserved.5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.9 *10 * This software is available to you under a choice of one of two11 * licenses. You may choose to be licensed under the terms of the GNU12 * General Public License (GPL) Version 2, available from the file13 * COPYING in the main directory of this source tree, or the14 * OpenIB.org BSD license below:15 *16 * Redistribution and use in source and binary forms, with or17 * without modification, are permitted provided that the following18 * conditions are met:19 *20 * - Redistributions of source code must retain the above21 * copyright notice, this list of conditions and the following22 * disclaimer.23 *24 * - Redistributions in binary form must reproduce the above25 * copyright notice, this list of conditions and the following26 * disclaimer in the documentation and/or other materials27 * 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 OF31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE36 * SOFTWARE.37 */38 39#include <linux/errno.h>40#include <linux/err.h>41#include <linux/export.h>42#include <linux/string.h>43#include <linux/slab.h>44#include <linux/in.h>45#include <linux/in6.h>46#include <net/addrconf.h>47#include <linux/security.h>48 49#include <rdma/ib_verbs.h>50#include <rdma/ib_cache.h>51#include <rdma/ib_addr.h>52#include <rdma/rw.h>53#include <rdma/lag.h>54 55#include "core_priv.h"56#include <trace/events/rdma_core.h>57 58static int ib_resolve_eth_dmac(struct ib_device *device,59 struct rdma_ah_attr *ah_attr);60 61static const char * const ib_events[] = {62 [IB_EVENT_CQ_ERR] = "CQ error",63 [IB_EVENT_QP_FATAL] = "QP fatal error",64 [IB_EVENT_QP_REQ_ERR] = "QP request error",65 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",66 [IB_EVENT_COMM_EST] = "communication established",67 [IB_EVENT_SQ_DRAINED] = "send queue drained",68 [IB_EVENT_PATH_MIG] = "path migration successful",69 [IB_EVENT_PATH_MIG_ERR] = "path migration error",70 [IB_EVENT_DEVICE_FATAL] = "device fatal error",71 [IB_EVENT_PORT_ACTIVE] = "port active",72 [IB_EVENT_PORT_ERR] = "port error",73 [IB_EVENT_LID_CHANGE] = "LID change",74 [IB_EVENT_PKEY_CHANGE] = "P_key change",75 [IB_EVENT_SM_CHANGE] = "SM change",76 [IB_EVENT_SRQ_ERR] = "SRQ error",77 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",78 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",79 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",80 [IB_EVENT_GID_CHANGE] = "GID changed",81};82 83const char *__attribute_const__ ib_event_msg(enum ib_event_type event)84{85 size_t index = event;86 87 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?88 ib_events[index] : "unrecognized event";89}90EXPORT_SYMBOL(ib_event_msg);91 92static const char * const wc_statuses[] = {93 [IB_WC_SUCCESS] = "success",94 [IB_WC_LOC_LEN_ERR] = "local length error",95 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",96 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",97 [IB_WC_LOC_PROT_ERR] = "local protection error",98 [IB_WC_WR_FLUSH_ERR] = "WR flushed",99 [IB_WC_MW_BIND_ERR] = "memory bind operation error",100 [IB_WC_BAD_RESP_ERR] = "bad response error",101 [IB_WC_LOC_ACCESS_ERR] = "local access error",102 [IB_WC_REM_INV_REQ_ERR] = "remote invalid request error",103 [IB_WC_REM_ACCESS_ERR] = "remote access error",104 [IB_WC_REM_OP_ERR] = "remote operation error",105 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",106 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",107 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",108 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",109 [IB_WC_REM_ABORT_ERR] = "operation aborted",110 [IB_WC_INV_EECN_ERR] = "invalid EE context number",111 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",112 [IB_WC_FATAL_ERR] = "fatal error",113 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",114 [IB_WC_GENERAL_ERR] = "general error",115};116 117const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)118{119 size_t index = status;120 121 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?122 wc_statuses[index] : "unrecognized status";123}124EXPORT_SYMBOL(ib_wc_status_msg);125 126__attribute_const__ int ib_rate_to_mult(enum ib_rate rate)127{128 switch (rate) {129 case IB_RATE_2_5_GBPS: return 1;130 case IB_RATE_5_GBPS: return 2;131 case IB_RATE_10_GBPS: return 4;132 case IB_RATE_20_GBPS: return 8;133 case IB_RATE_30_GBPS: return 12;134 case IB_RATE_40_GBPS: return 16;135 case IB_RATE_60_GBPS: return 24;136 case IB_RATE_80_GBPS: return 32;137 case IB_RATE_120_GBPS: return 48;138 case IB_RATE_14_GBPS: return 6;139 case IB_RATE_56_GBPS: return 22;140 case IB_RATE_112_GBPS: return 45;141 case IB_RATE_168_GBPS: return 67;142 case IB_RATE_25_GBPS: return 10;143 case IB_RATE_100_GBPS: return 40;144 case IB_RATE_200_GBPS: return 80;145 case IB_RATE_300_GBPS: return 120;146 case IB_RATE_28_GBPS: return 11;147 case IB_RATE_50_GBPS: return 20;148 case IB_RATE_400_GBPS: return 160;149 case IB_RATE_600_GBPS: return 240;150 case IB_RATE_800_GBPS: return 320;151 default: return -1;152 }153}154EXPORT_SYMBOL(ib_rate_to_mult);155 156__attribute_const__ enum ib_rate mult_to_ib_rate(int mult)157{158 switch (mult) {159 case 1: return IB_RATE_2_5_GBPS;160 case 2: return IB_RATE_5_GBPS;161 case 4: return IB_RATE_10_GBPS;162 case 8: return IB_RATE_20_GBPS;163 case 12: return IB_RATE_30_GBPS;164 case 16: return IB_RATE_40_GBPS;165 case 24: return IB_RATE_60_GBPS;166 case 32: return IB_RATE_80_GBPS;167 case 48: return IB_RATE_120_GBPS;168 case 6: return IB_RATE_14_GBPS;169 case 22: return IB_RATE_56_GBPS;170 case 45: return IB_RATE_112_GBPS;171 case 67: return IB_RATE_168_GBPS;172 case 10: return IB_RATE_25_GBPS;173 case 40: return IB_RATE_100_GBPS;174 case 80: return IB_RATE_200_GBPS;175 case 120: return IB_RATE_300_GBPS;176 case 11: return IB_RATE_28_GBPS;177 case 20: return IB_RATE_50_GBPS;178 case 160: return IB_RATE_400_GBPS;179 case 240: return IB_RATE_600_GBPS;180 case 320: return IB_RATE_800_GBPS;181 default: return IB_RATE_PORT_CURRENT;182 }183}184EXPORT_SYMBOL(mult_to_ib_rate);185 186__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)187{188 switch (rate) {189 case IB_RATE_2_5_GBPS: return 2500;190 case IB_RATE_5_GBPS: return 5000;191 case IB_RATE_10_GBPS: return 10000;192 case IB_RATE_20_GBPS: return 20000;193 case IB_RATE_30_GBPS: return 30000;194 case IB_RATE_40_GBPS: return 40000;195 case IB_RATE_60_GBPS: return 60000;196 case IB_RATE_80_GBPS: return 80000;197 case IB_RATE_120_GBPS: return 120000;198 case IB_RATE_14_GBPS: return 14062;199 case IB_RATE_56_GBPS: return 56250;200 case IB_RATE_112_GBPS: return 112500;201 case IB_RATE_168_GBPS: return 168750;202 case IB_RATE_25_GBPS: return 25781;203 case IB_RATE_100_GBPS: return 103125;204 case IB_RATE_200_GBPS: return 206250;205 case IB_RATE_300_GBPS: return 309375;206 case IB_RATE_28_GBPS: return 28125;207 case IB_RATE_50_GBPS: return 53125;208 case IB_RATE_400_GBPS: return 425000;209 case IB_RATE_600_GBPS: return 637500;210 case IB_RATE_800_GBPS: return 850000;211 default: return -1;212 }213}214EXPORT_SYMBOL(ib_rate_to_mbps);215 216__attribute_const__ enum rdma_transport_type217rdma_node_get_transport(unsigned int node_type)218{219 220 if (node_type == RDMA_NODE_USNIC)221 return RDMA_TRANSPORT_USNIC;222 if (node_type == RDMA_NODE_USNIC_UDP)223 return RDMA_TRANSPORT_USNIC_UDP;224 if (node_type == RDMA_NODE_RNIC)225 return RDMA_TRANSPORT_IWARP;226 if (node_type == RDMA_NODE_UNSPECIFIED)227 return RDMA_TRANSPORT_UNSPECIFIED;228 229 return RDMA_TRANSPORT_IB;230}231EXPORT_SYMBOL(rdma_node_get_transport);232 233enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,234 u32 port_num)235{236 enum rdma_transport_type lt;237 if (device->ops.get_link_layer)238 return device->ops.get_link_layer(device, port_num);239 240 lt = rdma_node_get_transport(device->node_type);241 if (lt == RDMA_TRANSPORT_IB)242 return IB_LINK_LAYER_INFINIBAND;243 244 return IB_LINK_LAYER_ETHERNET;245}246EXPORT_SYMBOL(rdma_port_get_link_layer);247 248/* Protection domains */249 250/**251 * __ib_alloc_pd - Allocates an unused protection domain.252 * @device: The device on which to allocate the protection domain.253 * @flags: protection domain flags254 * @caller: caller's build-time module name255 *256 * A protection domain object provides an association between QPs, shared257 * receive queues, address handles, memory regions, and memory windows.258 *259 * Every PD has a local_dma_lkey which can be used as the lkey value for local260 * memory operations.261 */262struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,263 const char *caller)264{265 struct ib_pd *pd;266 int mr_access_flags = 0;267 int ret;268 269 pd = rdma_zalloc_drv_obj(device, ib_pd);270 if (!pd)271 return ERR_PTR(-ENOMEM);272 273 pd->device = device;274 pd->flags = flags;275 276 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD);277 rdma_restrack_set_name(&pd->res, caller);278 279 ret = device->ops.alloc_pd(pd, NULL);280 if (ret) {281 rdma_restrack_put(&pd->res);282 kfree(pd);283 return ERR_PTR(ret);284 }285 rdma_restrack_add(&pd->res);286 287 if (device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY)288 pd->local_dma_lkey = device->local_dma_lkey;289 else290 mr_access_flags |= IB_ACCESS_LOCAL_WRITE;291 292 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {293 pr_warn("%s: enabling unsafe global rkey\n", caller);294 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;295 }296 297 if (mr_access_flags) {298 struct ib_mr *mr;299 300 mr = pd->device->ops.get_dma_mr(pd, mr_access_flags);301 if (IS_ERR(mr)) {302 ib_dealloc_pd(pd);303 return ERR_CAST(mr);304 }305 306 mr->device = pd->device;307 mr->pd = pd;308 mr->type = IB_MR_TYPE_DMA;309 mr->uobject = NULL;310 mr->need_inval = false;311 312 pd->__internal_mr = mr;313 314 if (!(device->attrs.kernel_cap_flags & IBK_LOCAL_DMA_LKEY))315 pd->local_dma_lkey = pd->__internal_mr->lkey;316 317 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)318 pd->unsafe_global_rkey = pd->__internal_mr->rkey;319 }320 321 return pd;322}323EXPORT_SYMBOL(__ib_alloc_pd);324 325/**326 * ib_dealloc_pd_user - Deallocates a protection domain.327 * @pd: The protection domain to deallocate.328 * @udata: Valid user data or NULL for kernel object329 *330 * It is an error to call this function while any resources in the pd still331 * exist. The caller is responsible to synchronously destroy them and332 * guarantee no new allocations will happen.333 */334int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata)335{336 int ret;337 338 if (pd->__internal_mr) {339 ret = pd->device->ops.dereg_mr(pd->__internal_mr, NULL);340 WARN_ON(ret);341 pd->__internal_mr = NULL;342 }343 344 ret = pd->device->ops.dealloc_pd(pd, udata);345 if (ret)346 return ret;347 348 rdma_restrack_del(&pd->res);349 kfree(pd);350 return ret;351}352EXPORT_SYMBOL(ib_dealloc_pd_user);353 354/* Address handles */355 356/**357 * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination.358 * @dest: Pointer to destination ah_attr. Contents of the destination359 * pointer is assumed to be invalid and attribute are overwritten.360 * @src: Pointer to source ah_attr.361 */362void rdma_copy_ah_attr(struct rdma_ah_attr *dest,363 const struct rdma_ah_attr *src)364{365 *dest = *src;366 if (dest->grh.sgid_attr)367 rdma_hold_gid_attr(dest->grh.sgid_attr);368}369EXPORT_SYMBOL(rdma_copy_ah_attr);370 371/**372 * rdma_replace_ah_attr - Replace valid ah_attr with new one.373 * @old: Pointer to existing ah_attr which needs to be replaced.374 * old is assumed to be valid or zero'd375 * @new: Pointer to the new ah_attr.376 *377 * rdma_replace_ah_attr() first releases any reference in the old ah_attr if378 * old the ah_attr is valid; after that it copies the new attribute and holds379 * the reference to the replaced ah_attr.380 */381void rdma_replace_ah_attr(struct rdma_ah_attr *old,382 const struct rdma_ah_attr *new)383{384 rdma_destroy_ah_attr(old);385 *old = *new;386 if (old->grh.sgid_attr)387 rdma_hold_gid_attr(old->grh.sgid_attr);388}389EXPORT_SYMBOL(rdma_replace_ah_attr);390 391/**392 * rdma_move_ah_attr - Move ah_attr pointed by source to destination.393 * @dest: Pointer to destination ah_attr to copy to.394 * dest is assumed to be valid or zero'd395 * @src: Pointer to the new ah_attr.396 *397 * rdma_move_ah_attr() first releases any reference in the destination ah_attr398 * if it is valid. This also transfers ownership of internal references from399 * src to dest, making src invalid in the process. No new reference of the src400 * ah_attr is taken.401 */402void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src)403{404 rdma_destroy_ah_attr(dest);405 *dest = *src;406 src->grh.sgid_attr = NULL;407}408EXPORT_SYMBOL(rdma_move_ah_attr);409 410/*411 * Validate that the rdma_ah_attr is valid for the device before passing it412 * off to the driver.413 */414static int rdma_check_ah_attr(struct ib_device *device,415 struct rdma_ah_attr *ah_attr)416{417 if (!rdma_is_port_valid(device, ah_attr->port_num))418 return -EINVAL;419 420 if ((rdma_is_grh_required(device, ah_attr->port_num) ||421 ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) &&422 !(ah_attr->ah_flags & IB_AH_GRH))423 return -EINVAL;424 425 if (ah_attr->grh.sgid_attr) {426 /*427 * Make sure the passed sgid_attr is consistent with the428 * parameters429 */430 if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index ||431 ah_attr->grh.sgid_attr->port_num != ah_attr->port_num)432 return -EINVAL;433 }434 return 0;435}436 437/*438 * If the ah requires a GRH then ensure that sgid_attr pointer is filled in.439 * On success the caller is responsible to call rdma_unfill_sgid_attr().440 */441static int rdma_fill_sgid_attr(struct ib_device *device,442 struct rdma_ah_attr *ah_attr,443 const struct ib_gid_attr **old_sgid_attr)444{445 const struct ib_gid_attr *sgid_attr;446 struct ib_global_route *grh;447 int ret;448 449 *old_sgid_attr = ah_attr->grh.sgid_attr;450 451 ret = rdma_check_ah_attr(device, ah_attr);452 if (ret)453 return ret;454 455 if (!(ah_attr->ah_flags & IB_AH_GRH))456 return 0;457 458 grh = rdma_ah_retrieve_grh(ah_attr);459 if (grh->sgid_attr)460 return 0;461 462 sgid_attr =463 rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index);464 if (IS_ERR(sgid_attr))465 return PTR_ERR(sgid_attr);466 467 /* Move ownerhip of the kref into the ah_attr */468 grh->sgid_attr = sgid_attr;469 return 0;470}471 472static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr,473 const struct ib_gid_attr *old_sgid_attr)474{475 /*476 * Fill didn't change anything, the caller retains ownership of477 * whatever it passed478 */479 if (ah_attr->grh.sgid_attr == old_sgid_attr)480 return;481 482 /*483 * Otherwise, we need to undo what rdma_fill_sgid_attr so the caller484 * doesn't see any change in the rdma_ah_attr. If we get here485 * old_sgid_attr is NULL.486 */487 rdma_destroy_ah_attr(ah_attr);488}489 490static const struct ib_gid_attr *491rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr,492 const struct ib_gid_attr *old_attr)493{494 if (old_attr)495 rdma_put_gid_attr(old_attr);496 if (ah_attr->ah_flags & IB_AH_GRH) {497 rdma_hold_gid_attr(ah_attr->grh.sgid_attr);498 return ah_attr->grh.sgid_attr;499 }500 return NULL;501}502 503static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,504 struct rdma_ah_attr *ah_attr,505 u32 flags,506 struct ib_udata *udata,507 struct net_device *xmit_slave)508{509 struct rdma_ah_init_attr init_attr = {};510 struct ib_device *device = pd->device;511 struct ib_ah *ah;512 int ret;513 514 might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE);515 516 if (!udata && !device->ops.create_ah)517 return ERR_PTR(-EOPNOTSUPP);518 519 ah = rdma_zalloc_drv_obj_gfp(520 device, ib_ah,521 (flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC);522 if (!ah)523 return ERR_PTR(-ENOMEM);524 525 ah->device = device;526 ah->pd = pd;527 ah->type = ah_attr->type;528 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL);529 init_attr.ah_attr = ah_attr;530 init_attr.flags = flags;531 init_attr.xmit_slave = xmit_slave;532 533 if (udata)534 ret = device->ops.create_user_ah(ah, &init_attr, udata);535 else536 ret = device->ops.create_ah(ah, &init_attr, NULL);537 if (ret) {538 if (ah->sgid_attr)539 rdma_put_gid_attr(ah->sgid_attr);540 kfree(ah);541 return ERR_PTR(ret);542 }543 544 atomic_inc(&pd->usecnt);545 return ah;546}547 548/**549 * rdma_create_ah - Creates an address handle for the550 * given address vector.551 * @pd: The protection domain associated with the address handle.552 * @ah_attr: The attributes of the address vector.553 * @flags: Create address handle flags (see enum rdma_create_ah_flags).554 *555 * It returns 0 on success and returns appropriate error code on error.556 * The address handle is used to reference a local or global destination557 * in all UD QP post sends.558 */559struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,560 u32 flags)561{562 const struct ib_gid_attr *old_sgid_attr;563 struct net_device *slave;564 struct ib_ah *ah;565 int ret;566 567 ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);568 if (ret)569 return ERR_PTR(ret);570 slave = rdma_lag_get_ah_roce_slave(pd->device, ah_attr,571 (flags & RDMA_CREATE_AH_SLEEPABLE) ?572 GFP_KERNEL : GFP_ATOMIC);573 if (IS_ERR(slave)) {574 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);575 return (void *)slave;576 }577 ah = _rdma_create_ah(pd, ah_attr, flags, NULL, slave);578 rdma_lag_put_ah_roce_slave(slave);579 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);580 return ah;581}582EXPORT_SYMBOL(rdma_create_ah);583 584/**585 * rdma_create_user_ah - Creates an address handle for the586 * given address vector.587 * It resolves destination mac address for ah attribute of RoCE type.588 * @pd: The protection domain associated with the address handle.589 * @ah_attr: The attributes of the address vector.590 * @udata: pointer to user's input output buffer information need by591 * provider driver.592 *593 * It returns 0 on success and returns appropriate error code on error.594 * The address handle is used to reference a local or global destination595 * in all UD QP post sends.596 */597struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,598 struct rdma_ah_attr *ah_attr,599 struct ib_udata *udata)600{601 const struct ib_gid_attr *old_sgid_attr;602 struct ib_ah *ah;603 int err;604 605 err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);606 if (err)607 return ERR_PTR(err);608 609 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {610 err = ib_resolve_eth_dmac(pd->device, ah_attr);611 if (err) {612 ah = ERR_PTR(err);613 goto out;614 }615 }616 617 ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE,618 udata, NULL);619 620out:621 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);622 return ah;623}624EXPORT_SYMBOL(rdma_create_user_ah);625 626int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)627{628 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh;629 struct iphdr ip4h_checked;630 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh;631 632 /* If it's IPv6, the version must be 6, otherwise, the first633 * 20 bytes (before the IPv4 header) are garbled.634 */635 if (ip6h->version != 6)636 return (ip4h->version == 4) ? 4 : 0;637 /* version may be 6 or 4 because the first 20 bytes could be garbled */638 639 /* RoCE v2 requires no options, thus header length640 * must be 5 words641 */642 if (ip4h->ihl != 5)643 return 6;644 645 /* Verify checksum.646 * We can't write on scattered buffers so we need to copy to647 * temp buffer.648 */649 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));650 ip4h_checked.check = 0;651 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5);652 /* if IPv4 header checksum is OK, believe it */653 if (ip4h->check == ip4h_checked.check)654 return 4;655 return 6;656}657EXPORT_SYMBOL(ib_get_rdma_header_version);658 659static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,660 u32 port_num,661 const struct ib_grh *grh)662{663 int grh_version;664 665 if (rdma_protocol_ib(device, port_num))666 return RDMA_NETWORK_IB;667 668 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);669 670 if (grh_version == 4)671 return RDMA_NETWORK_IPV4;672 673 if (grh->next_hdr == IPPROTO_UDP)674 return RDMA_NETWORK_IPV6;675 676 return RDMA_NETWORK_ROCE_V1;677}678 679struct find_gid_index_context {680 u16 vlan_id;681 enum ib_gid_type gid_type;682};683 684static bool find_gid_index(const union ib_gid *gid,685 const struct ib_gid_attr *gid_attr,686 void *context)687{688 struct find_gid_index_context *ctx = context;689 u16 vlan_id = 0xffff;690 int ret;691 692 if (ctx->gid_type != gid_attr->gid_type)693 return false;694 695 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL);696 if (ret)697 return false;698 699 return ctx->vlan_id == vlan_id;700}701 702static const struct ib_gid_attr *703get_sgid_attr_from_eth(struct ib_device *device, u32 port_num,704 u16 vlan_id, const union ib_gid *sgid,705 enum ib_gid_type gid_type)706{707 struct find_gid_index_context context = {.vlan_id = vlan_id,708 .gid_type = gid_type};709 710 return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index,711 &context);712}713 714int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,715 enum rdma_network_type net_type,716 union ib_gid *sgid, union ib_gid *dgid)717{718 struct sockaddr_in src_in;719 struct sockaddr_in dst_in;720 __be32 src_saddr, dst_saddr;721 722 if (!sgid || !dgid)723 return -EINVAL;724 725 if (net_type == RDMA_NETWORK_IPV4) {726 memcpy(&src_in.sin_addr.s_addr,727 &hdr->roce4grh.saddr, 4);728 memcpy(&dst_in.sin_addr.s_addr,729 &hdr->roce4grh.daddr, 4);730 src_saddr = src_in.sin_addr.s_addr;731 dst_saddr = dst_in.sin_addr.s_addr;732 ipv6_addr_set_v4mapped(src_saddr,733 (struct in6_addr *)sgid);734 ipv6_addr_set_v4mapped(dst_saddr,735 (struct in6_addr *)dgid);736 return 0;737 } else if (net_type == RDMA_NETWORK_IPV6 ||738 net_type == RDMA_NETWORK_IB || RDMA_NETWORK_ROCE_V1) {739 *dgid = hdr->ibgrh.dgid;740 *sgid = hdr->ibgrh.sgid;741 return 0;742 } else {743 return -EINVAL;744 }745}746EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);747 748/* Resolve destination mac address and hop limit for unicast destination749 * GID entry, considering the source GID entry as well.750 * ah_attribute must have valid port_num, sgid_index.751 */752static int ib_resolve_unicast_gid_dmac(struct ib_device *device,753 struct rdma_ah_attr *ah_attr)754{755 struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);756 const struct ib_gid_attr *sgid_attr = grh->sgid_attr;757 int hop_limit = 0xff;758 int ret = 0;759 760 /* If destination is link local and source GID is RoCEv1,761 * IP stack is not used.762 */763 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) &&764 sgid_attr->gid_type == IB_GID_TYPE_ROCE) {765 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,766 ah_attr->roce.dmac);767 return ret;768 }769 770 ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid,771 ah_attr->roce.dmac,772 sgid_attr, &hop_limit);773 774 grh->hop_limit = hop_limit;775 return ret;776}777 778/*779 * This function initializes address handle attributes from the incoming packet.780 * Incoming packet has dgid of the receiver node on which this code is781 * getting executed and, sgid contains the GID of the sender.782 *783 * When resolving mac address of destination, the arrived dgid is used784 * as sgid and, sgid is used as dgid because sgid contains destinations785 * GID whom to respond to.786 *787 * On success the caller is responsible to call rdma_destroy_ah_attr on the788 * attr.789 */790int ib_init_ah_attr_from_wc(struct ib_device *device, u32 port_num,791 const struct ib_wc *wc, const struct ib_grh *grh,792 struct rdma_ah_attr *ah_attr)793{794 u32 flow_class;795 int ret;796 enum rdma_network_type net_type = RDMA_NETWORK_IB;797 enum ib_gid_type gid_type = IB_GID_TYPE_IB;798 const struct ib_gid_attr *sgid_attr;799 int hoplimit = 0xff;800 union ib_gid dgid;801 union ib_gid sgid;802 803 might_sleep();804 805 memset(ah_attr, 0, sizeof *ah_attr);806 ah_attr->type = rdma_ah_find_type(device, port_num);807 if (rdma_cap_eth_ah(device, port_num)) {808 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)809 net_type = wc->network_hdr_type;810 else811 net_type = ib_get_net_type_by_grh(device, port_num, grh);812 gid_type = ib_network_to_gid_type(net_type);813 }814 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,815 &sgid, &dgid);816 if (ret)817 return ret;818 819 rdma_ah_set_sl(ah_attr, wc->sl);820 rdma_ah_set_port_num(ah_attr, port_num);821 822 if (rdma_protocol_roce(device, port_num)) {823 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?824 wc->vlan_id : 0xffff;825 826 if (!(wc->wc_flags & IB_WC_GRH))827 return -EPROTOTYPE;828 829 sgid_attr = get_sgid_attr_from_eth(device, port_num,830 vlan_id, &dgid,831 gid_type);832 if (IS_ERR(sgid_attr))833 return PTR_ERR(sgid_attr);834 835 flow_class = be32_to_cpu(grh->version_tclass_flow);836 rdma_move_grh_sgid_attr(ah_attr,837 &sgid,838 flow_class & 0xFFFFF,839 hoplimit,840 (flow_class >> 20) & 0xFF,841 sgid_attr);842 843 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);844 if (ret)845 rdma_destroy_ah_attr(ah_attr);846 847 return ret;848 } else {849 rdma_ah_set_dlid(ah_attr, wc->slid);850 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);851 852 if ((wc->wc_flags & IB_WC_GRH) == 0)853 return 0;854 855 if (dgid.global.interface_id !=856 cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {857 sgid_attr = rdma_find_gid_by_port(858 device, &dgid, IB_GID_TYPE_IB, port_num, NULL);859 } else860 sgid_attr = rdma_get_gid_attr(device, port_num, 0);861 862 if (IS_ERR(sgid_attr))863 return PTR_ERR(sgid_attr);864 flow_class = be32_to_cpu(grh->version_tclass_flow);865 rdma_move_grh_sgid_attr(ah_attr,866 &sgid,867 flow_class & 0xFFFFF,868 hoplimit,869 (flow_class >> 20) & 0xFF,870 sgid_attr);871 872 return 0;873 }874}875EXPORT_SYMBOL(ib_init_ah_attr_from_wc);876 877/**878 * rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership879 * of the reference880 *881 * @attr: Pointer to AH attribute structure882 * @dgid: Destination GID883 * @flow_label: Flow label884 * @hop_limit: Hop limit885 * @traffic_class: traffic class886 * @sgid_attr: Pointer to SGID attribute887 *888 * This takes ownership of the sgid_attr reference. The caller must ensure889 * rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after890 * calling this function.891 */892void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,893 u32 flow_label, u8 hop_limit, u8 traffic_class,894 const struct ib_gid_attr *sgid_attr)895{896 rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit,897 traffic_class);898 attr->grh.sgid_attr = sgid_attr;899}900EXPORT_SYMBOL(rdma_move_grh_sgid_attr);901 902/**903 * rdma_destroy_ah_attr - Release reference to SGID attribute of904 * ah attribute.905 * @ah_attr: Pointer to ah attribute906 *907 * Release reference to the SGID attribute of the ah attribute if it is908 * non NULL. It is safe to call this multiple times, and safe to call it on909 * a zero initialized ah_attr.910 */911void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr)912{913 if (ah_attr->grh.sgid_attr) {914 rdma_put_gid_attr(ah_attr->grh.sgid_attr);915 ah_attr->grh.sgid_attr = NULL;916 }917}918EXPORT_SYMBOL(rdma_destroy_ah_attr);919 920struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,921 const struct ib_grh *grh, u32 port_num)922{923 struct rdma_ah_attr ah_attr;924 struct ib_ah *ah;925 int ret;926 927 ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);928 if (ret)929 return ERR_PTR(ret);930 931 ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE);932 933 rdma_destroy_ah_attr(&ah_attr);934 return ah;935}936EXPORT_SYMBOL(ib_create_ah_from_wc);937 938int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)939{940 const struct ib_gid_attr *old_sgid_attr;941 int ret;942 943 if (ah->type != ah_attr->type)944 return -EINVAL;945 946 ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);947 if (ret)948 return ret;949 950 ret = ah->device->ops.modify_ah ?951 ah->device->ops.modify_ah(ah, ah_attr) :952 -EOPNOTSUPP;953 954 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);955 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);956 return ret;957}958EXPORT_SYMBOL(rdma_modify_ah);959 960int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)961{962 ah_attr->grh.sgid_attr = NULL;963 964 return ah->device->ops.query_ah ?965 ah->device->ops.query_ah(ah, ah_attr) :966 -EOPNOTSUPP;967}968EXPORT_SYMBOL(rdma_query_ah);969 970int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata)971{972 const struct ib_gid_attr *sgid_attr = ah->sgid_attr;973 struct ib_pd *pd;974 int ret;975 976 might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE);977 978 pd = ah->pd;979 980 ret = ah->device->ops.destroy_ah(ah, flags);981 if (ret)982 return ret;983 984 atomic_dec(&pd->usecnt);985 if (sgid_attr)986 rdma_put_gid_attr(sgid_attr);987 988 kfree(ah);989 return ret;990}991EXPORT_SYMBOL(rdma_destroy_ah_user);992 993/* Shared receive queues */994 995/**996 * ib_create_srq_user - Creates a SRQ associated with the specified protection997 * domain.998 * @pd: The protection domain associated with the SRQ.999 * @srq_init_attr: A list of initial attributes required to create the1000 * SRQ. If SRQ creation succeeds, then the attributes are updated to1001 * the actual capabilities of the created SRQ.1002 * @uobject: uobject pointer if this is not a kernel SRQ1003 * @udata: udata pointer if this is not a kernel SRQ1004 *1005 * srq_attr->max_wr and srq_attr->max_sge are read the determine the1006 * requested size of the SRQ, and set to the actual values allocated1007 * on return. If ib_create_srq() succeeds, then max_wr and max_sge1008 * will always be at least as large as the requested values.1009 */1010struct ib_srq *ib_create_srq_user(struct ib_pd *pd,1011 struct ib_srq_init_attr *srq_init_attr,1012 struct ib_usrq_object *uobject,1013 struct ib_udata *udata)1014{1015 struct ib_srq *srq;1016 int ret;1017 1018 srq = rdma_zalloc_drv_obj(pd->device, ib_srq);1019 if (!srq)1020 return ERR_PTR(-ENOMEM);1021 1022 srq->device = pd->device;1023 srq->pd = pd;1024 srq->event_handler = srq_init_attr->event_handler;1025 srq->srq_context = srq_init_attr->srq_context;1026 srq->srq_type = srq_init_attr->srq_type;1027 srq->uobject = uobject;1028 1029 if (ib_srq_has_cq(srq->srq_type)) {1030 srq->ext.cq = srq_init_attr->ext.cq;1031 atomic_inc(&srq->ext.cq->usecnt);1032 }1033 if (srq->srq_type == IB_SRQT_XRC) {1034 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;1035 if (srq->ext.xrc.xrcd)1036 atomic_inc(&srq->ext.xrc.xrcd->usecnt);1037 }1038 atomic_inc(&pd->usecnt);1039 1040 rdma_restrack_new(&srq->res, RDMA_RESTRACK_SRQ);1041 rdma_restrack_parent_name(&srq->res, &pd->res);1042 1043 ret = pd->device->ops.create_srq(srq, srq_init_attr, udata);1044 if (ret) {1045 rdma_restrack_put(&srq->res);1046 atomic_dec(&pd->usecnt);1047 if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd)1048 atomic_dec(&srq->ext.xrc.xrcd->usecnt);1049 if (ib_srq_has_cq(srq->srq_type))1050 atomic_dec(&srq->ext.cq->usecnt);1051 kfree(srq);1052 return ERR_PTR(ret);1053 }1054 1055 rdma_restrack_add(&srq->res);1056 1057 return srq;1058}1059EXPORT_SYMBOL(ib_create_srq_user);1060 1061int ib_modify_srq(struct ib_srq *srq,1062 struct ib_srq_attr *srq_attr,1063 enum ib_srq_attr_mask srq_attr_mask)1064{1065 return srq->device->ops.modify_srq ?1066 srq->device->ops.modify_srq(srq, srq_attr, srq_attr_mask,1067 NULL) : -EOPNOTSUPP;1068}1069EXPORT_SYMBOL(ib_modify_srq);1070 1071int ib_query_srq(struct ib_srq *srq,1072 struct ib_srq_attr *srq_attr)1073{1074 return srq->device->ops.query_srq ?1075 srq->device->ops.query_srq(srq, srq_attr) : -EOPNOTSUPP;1076}1077EXPORT_SYMBOL(ib_query_srq);1078 1079int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata)1080{1081 int ret;1082 1083 if (atomic_read(&srq->usecnt))1084 return -EBUSY;1085 1086 ret = srq->device->ops.destroy_srq(srq, udata);1087 if (ret)1088 return ret;1089 1090 atomic_dec(&srq->pd->usecnt);1091 if (srq->srq_type == IB_SRQT_XRC && srq->ext.xrc.xrcd)1092 atomic_dec(&srq->ext.xrc.xrcd->usecnt);1093 if (ib_srq_has_cq(srq->srq_type))1094 atomic_dec(&srq->ext.cq->usecnt);1095 rdma_restrack_del(&srq->res);1096 kfree(srq);1097 1098 return ret;1099}1100EXPORT_SYMBOL(ib_destroy_srq_user);1101 1102/* Queue pairs */1103 1104static void __ib_qp_event_handler(struct ib_event *event, void *context)1105{1106 struct ib_qp *qp = event->element.qp;1107 1108 if (event->event == IB_EVENT_QP_LAST_WQE_REACHED)1109 complete(&qp->srq_completion);1110 if (qp->registered_event_handler)1111 qp->registered_event_handler(event, qp->qp_context);1112}1113 1114static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)1115{1116 struct ib_qp *qp = context;1117 unsigned long flags;1118 1119 spin_lock_irqsave(&qp->device->qp_open_list_lock, flags);1120 list_for_each_entry(event->element.qp, &qp->open_list, open_list)1121 if (event->element.qp->event_handler)1122 event->element.qp->event_handler(event, event->element.qp->qp_context);1123 spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags);1124}1125 1126static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,1127 void (*event_handler)(struct ib_event *, void *),1128 void *qp_context)1129{1130 struct ib_qp *qp;1131 unsigned long flags;1132 int err;1133 1134 qp = kzalloc(sizeof *qp, GFP_KERNEL);1135 if (!qp)1136 return ERR_PTR(-ENOMEM);1137 1138 qp->real_qp = real_qp;1139 err = ib_open_shared_qp_security(qp, real_qp->device);1140 if (err) {1141 kfree(qp);1142 return ERR_PTR(err);1143 }1144 1145 qp->real_qp = real_qp;1146 atomic_inc(&real_qp->usecnt);1147 qp->device = real_qp->device;1148 qp->event_handler = event_handler;1149 qp->qp_context = qp_context;1150 qp->qp_num = real_qp->qp_num;1151 qp->qp_type = real_qp->qp_type;1152 1153 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);1154 list_add(&qp->open_list, &real_qp->open_list);1155 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);1156 1157 return qp;1158}1159 1160struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,1161 struct ib_qp_open_attr *qp_open_attr)1162{1163 struct ib_qp *qp, *real_qp;1164 1165 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)1166 return ERR_PTR(-EINVAL);1167 1168 down_read(&xrcd->tgt_qps_rwsem);1169 real_qp = xa_load(&xrcd->tgt_qps, qp_open_attr->qp_num);1170 if (!real_qp) {1171 up_read(&xrcd->tgt_qps_rwsem);1172 return ERR_PTR(-EINVAL);1173 }1174 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,1175 qp_open_attr->qp_context);1176 up_read(&xrcd->tgt_qps_rwsem);1177 return qp;1178}1179EXPORT_SYMBOL(ib_open_qp);1180 1181static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp,1182 struct ib_qp_init_attr *qp_init_attr)1183{1184 struct ib_qp *real_qp = qp;1185 int err;1186 1187 qp->event_handler = __ib_shared_qp_event_handler;1188 qp->qp_context = qp;1189 qp->pd = NULL;1190 qp->send_cq = qp->recv_cq = NULL;1191 qp->srq = NULL;1192 qp->xrcd = qp_init_attr->xrcd;1193 atomic_inc(&qp_init_attr->xrcd->usecnt);1194 INIT_LIST_HEAD(&qp->open_list);1195 1196 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,1197 qp_init_attr->qp_context);1198 if (IS_ERR(qp))1199 return qp;1200 1201 err = xa_err(xa_store(&qp_init_attr->xrcd->tgt_qps, real_qp->qp_num,1202 real_qp, GFP_KERNEL));1203 if (err) {1204 ib_close_qp(qp);1205 return ERR_PTR(err);1206 }1207 return qp;1208}1209 1210static struct ib_qp *create_qp(struct ib_device *dev, struct ib_pd *pd,1211 struct ib_qp_init_attr *attr,1212 struct ib_udata *udata,1213 struct ib_uqp_object *uobj, const char *caller)1214{1215 struct ib_udata dummy = {};1216 struct ib_qp *qp;1217 int ret;1218 1219 if (!dev->ops.create_qp)1220 return ERR_PTR(-EOPNOTSUPP);1221 1222 qp = rdma_zalloc_drv_obj_numa(dev, ib_qp);1223 if (!qp)1224 return ERR_PTR(-ENOMEM);1225 1226 qp->device = dev;1227 qp->pd = pd;1228 qp->uobject = uobj;1229 qp->real_qp = qp;1230 1231 qp->qp_type = attr->qp_type;1232 qp->rwq_ind_tbl = attr->rwq_ind_tbl;1233 qp->srq = attr->srq;1234 qp->event_handler = __ib_qp_event_handler;1235 qp->registered_event_handler = attr->event_handler;1236 qp->port = attr->port_num;1237 qp->qp_context = attr->qp_context;1238 1239 spin_lock_init(&qp->mr_lock);1240 INIT_LIST_HEAD(&qp->rdma_mrs);1241 INIT_LIST_HEAD(&qp->sig_mrs);1242 init_completion(&qp->srq_completion);1243 1244 qp->send_cq = attr->send_cq;1245 qp->recv_cq = attr->recv_cq;1246 1247 rdma_restrack_new(&qp->res, RDMA_RESTRACK_QP);1248 WARN_ONCE(!udata && !caller, "Missing kernel QP owner");1249 rdma_restrack_set_name(&qp->res, udata ? NULL : caller);1250 ret = dev->ops.create_qp(qp, attr, udata);1251 if (ret)1252 goto err_create;1253 1254 /*1255 * TODO: The mlx4 internally overwrites send_cq and recv_cq.1256 * Unfortunately, it is not an easy task to fix that driver.1257 */1258 qp->send_cq = attr->send_cq;1259 qp->recv_cq = attr->recv_cq;1260 1261 ret = ib_create_qp_security(qp, dev);1262 if (ret)1263 goto err_security;1264 1265 rdma_restrack_add(&qp->res);1266 return qp;1267 1268err_security:1269 qp->device->ops.destroy_qp(qp, udata ? &dummy : NULL);1270err_create:1271 rdma_restrack_put(&qp->res);1272 kfree(qp);1273 return ERR_PTR(ret);1274 1275}1276 1277/**1278 * ib_create_qp_user - Creates a QP associated with the specified protection1279 * domain.1280 * @dev: IB device1281 * @pd: The protection domain associated with the QP.1282 * @attr: A list of initial attributes required to create the1283 * QP. If QP creation succeeds, then the attributes are updated to1284 * the actual capabilities of the created QP.1285 * @udata: User data1286 * @uobj: uverbs obect1287 * @caller: caller's build-time module name1288 */1289struct ib_qp *ib_create_qp_user(struct ib_device *dev, struct ib_pd *pd,1290 struct ib_qp_init_attr *attr,1291 struct ib_udata *udata,1292 struct ib_uqp_object *uobj, const char *caller)1293{1294 struct ib_qp *qp, *xrc_qp;1295 1296 if (attr->qp_type == IB_QPT_XRC_TGT)1297 qp = create_qp(dev, pd, attr, NULL, NULL, caller);1298 else1299 qp = create_qp(dev, pd, attr, udata, uobj, NULL);1300 if (attr->qp_type != IB_QPT_XRC_TGT || IS_ERR(qp))1301 return qp;1302 1303 xrc_qp = create_xrc_qp_user(qp, attr);1304 if (IS_ERR(xrc_qp)) {1305 ib_destroy_qp(qp);1306 return xrc_qp;1307 }1308 1309 xrc_qp->uobject = uobj;1310 return xrc_qp;1311}1312EXPORT_SYMBOL(ib_create_qp_user);1313 1314void ib_qp_usecnt_inc(struct ib_qp *qp)1315{1316 if (qp->pd)1317 atomic_inc(&qp->pd->usecnt);1318 if (qp->send_cq)1319 atomic_inc(&qp->send_cq->usecnt);1320 if (qp->recv_cq)1321 atomic_inc(&qp->recv_cq->usecnt);1322 if (qp->srq)1323 atomic_inc(&qp->srq->usecnt);1324 if (qp->rwq_ind_tbl)1325 atomic_inc(&qp->rwq_ind_tbl->usecnt);1326}1327EXPORT_SYMBOL(ib_qp_usecnt_inc);1328 1329void ib_qp_usecnt_dec(struct ib_qp *qp)1330{1331 if (qp->rwq_ind_tbl)1332 atomic_dec(&qp->rwq_ind_tbl->usecnt);1333 if (qp->srq)1334 atomic_dec(&qp->srq->usecnt);1335 if (qp->recv_cq)1336 atomic_dec(&qp->recv_cq->usecnt);1337 if (qp->send_cq)1338 atomic_dec(&qp->send_cq->usecnt);1339 if (qp->pd)1340 atomic_dec(&qp->pd->usecnt);1341}1342EXPORT_SYMBOL(ib_qp_usecnt_dec);1343 1344struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd,1345 struct ib_qp_init_attr *qp_init_attr,1346 const char *caller)1347{1348 struct ib_device *device = pd->device;1349 struct ib_qp *qp;1350 int ret;1351 1352 /*1353 * If the callers is using the RDMA API calculate the resources1354 * needed for the RDMA READ/WRITE operations.1355 *1356 * Note that these callers need to pass in a port number.1357 */1358 if (qp_init_attr->cap.max_rdma_ctxs)1359 rdma_rw_init_qp(device, qp_init_attr);1360 1361 qp = create_qp(device, pd, qp_init_attr, NULL, NULL, caller);1362 if (IS_ERR(qp))1363 return qp;1364 1365 ib_qp_usecnt_inc(qp);1366 1367 if (qp_init_attr->cap.max_rdma_ctxs) {1368 ret = rdma_rw_init_mrs(qp, qp_init_attr);1369 if (ret)1370 goto err;1371 }1372 1373 /*1374 * Note: all hw drivers guarantee that max_send_sge is lower than1375 * the device RDMA WRITE SGE limit but not all hw drivers ensure that1376 * max_send_sge <= max_sge_rd.1377 */1378 qp->max_write_sge = qp_init_attr->cap.max_send_sge;1379 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,1380 device->attrs.max_sge_rd);1381 if (qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN)1382 qp->integrity_en = true;1383 1384 return qp;1385 1386err:1387 ib_destroy_qp(qp);1388 return ERR_PTR(ret);1389 1390}1391EXPORT_SYMBOL(ib_create_qp_kernel);1392 1393static const struct {1394 int valid;1395 enum ib_qp_attr_mask req_param[IB_QPT_MAX];1396 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];1397} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {1398 [IB_QPS_RESET] = {1399 [IB_QPS_RESET] = { .valid = 1 },1400 [IB_QPS_INIT] = {1401 .valid = 1,1402 .req_param = {1403 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |1404 IB_QP_PORT |1405 IB_QP_QKEY),1406 [IB_QPT_RAW_PACKET] = IB_QP_PORT,1407 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |1408 IB_QP_PORT |1409 IB_QP_ACCESS_FLAGS),1410 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |1411 IB_QP_PORT |1412 IB_QP_ACCESS_FLAGS),1413 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |1414 IB_QP_PORT |1415 IB_QP_ACCESS_FLAGS),1416 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |1417 IB_QP_PORT |1418 IB_QP_ACCESS_FLAGS),1419 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |1420 IB_QP_QKEY),1421 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |1422 IB_QP_QKEY),1423 }1424 },1425 },1426 [IB_QPS_INIT] = {1427 [IB_QPS_RESET] = { .valid = 1 },1428 [IB_QPS_ERR] = { .valid = 1 },1429 [IB_QPS_INIT] = {1430 .valid = 1,1431 .opt_param = {1432 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |1433 IB_QP_PORT |1434 IB_QP_QKEY),1435 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |1436 IB_QP_PORT |1437 IB_QP_ACCESS_FLAGS),1438 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |1439 IB_QP_PORT |1440 IB_QP_ACCESS_FLAGS),1441 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |1442 IB_QP_PORT |1443 IB_QP_ACCESS_FLAGS),1444 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |1445 IB_QP_PORT |1446 IB_QP_ACCESS_FLAGS),1447 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |1448 IB_QP_QKEY),1449 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |1450 IB_QP_QKEY),1451 }1452 },1453 [IB_QPS_RTR] = {1454 .valid = 1,1455 .req_param = {1456 [IB_QPT_UC] = (IB_QP_AV |1457 IB_QP_PATH_MTU |1458 IB_QP_DEST_QPN |1459 IB_QP_RQ_PSN),1460 [IB_QPT_RC] = (IB_QP_AV |1461 IB_QP_PATH_MTU |1462 IB_QP_DEST_QPN |1463 IB_QP_RQ_PSN |1464 IB_QP_MAX_DEST_RD_ATOMIC |1465 IB_QP_MIN_RNR_TIMER),1466 [IB_QPT_XRC_INI] = (IB_QP_AV |1467 IB_QP_PATH_MTU |1468 IB_QP_DEST_QPN |1469 IB_QP_RQ_PSN),1470 [IB_QPT_XRC_TGT] = (IB_QP_AV |1471 IB_QP_PATH_MTU |1472 IB_QP_DEST_QPN |1473 IB_QP_RQ_PSN |1474 IB_QP_MAX_DEST_RD_ATOMIC |1475 IB_QP_MIN_RNR_TIMER),1476 },1477 .opt_param = {1478 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |1479 IB_QP_QKEY),1480 [IB_QPT_UC] = (IB_QP_ALT_PATH |1481 IB_QP_ACCESS_FLAGS |1482 IB_QP_PKEY_INDEX),1483 [IB_QPT_RC] = (IB_QP_ALT_PATH |1484 IB_QP_ACCESS_FLAGS |1485 IB_QP_PKEY_INDEX),1486 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |1487 IB_QP_ACCESS_FLAGS |1488 IB_QP_PKEY_INDEX),1489 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |1490 IB_QP_ACCESS_FLAGS |1491 IB_QP_PKEY_INDEX),1492 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |1493 IB_QP_QKEY),1494 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |1495 IB_QP_QKEY),1496 },1497 },1498 },1499 [IB_QPS_RTR] = {1500 [IB_QPS_RESET] = { .valid = 1 },1501 [IB_QPS_ERR] = { .valid = 1 },1502 [IB_QPS_RTS] = {1503 .valid = 1,1504 .req_param = {1505 [IB_QPT_UD] = IB_QP_SQ_PSN,1506 [IB_QPT_UC] = IB_QP_SQ_PSN,1507 [IB_QPT_RC] = (IB_QP_TIMEOUT |1508 IB_QP_RETRY_CNT |1509 IB_QP_RNR_RETRY |1510 IB_QP_SQ_PSN |1511 IB_QP_MAX_QP_RD_ATOMIC),1512 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |1513 IB_QP_RETRY_CNT |1514 IB_QP_RNR_RETRY |1515 IB_QP_SQ_PSN |1516 IB_QP_MAX_QP_RD_ATOMIC),1517 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |1518 IB_QP_SQ_PSN),1519 [IB_QPT_SMI] = IB_QP_SQ_PSN,1520 [IB_QPT_GSI] = IB_QP_SQ_PSN,1521 },1522 .opt_param = {1523 [IB_QPT_UD] = (IB_QP_CUR_STATE |1524 IB_QP_QKEY),1525 [IB_QPT_UC] = (IB_QP_CUR_STATE |1526 IB_QP_ALT_PATH |1527 IB_QP_ACCESS_FLAGS |1528 IB_QP_PATH_MIG_STATE),1529 [IB_QPT_RC] = (IB_QP_CUR_STATE |1530 IB_QP_ALT_PATH |1531 IB_QP_ACCESS_FLAGS |1532 IB_QP_MIN_RNR_TIMER |1533 IB_QP_PATH_MIG_STATE),1534 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |1535 IB_QP_ALT_PATH |1536 IB_QP_ACCESS_FLAGS |1537 IB_QP_PATH_MIG_STATE),1538 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |1539 IB_QP_ALT_PATH |1540 IB_QP_ACCESS_FLAGS |1541 IB_QP_MIN_RNR_TIMER |1542 IB_QP_PATH_MIG_STATE),1543 [IB_QPT_SMI] = (IB_QP_CUR_STATE |1544 IB_QP_QKEY),1545 [IB_QPT_GSI] = (IB_QP_CUR_STATE |1546 IB_QP_QKEY),1547 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,1548 }1549 }1550 },1551 [IB_QPS_RTS] = {1552 [IB_QPS_RESET] = { .valid = 1 },1553 [IB_QPS_ERR] = { .valid = 1 },1554 [IB_QPS_RTS] = {1555 .valid = 1,1556 .opt_param = {1557 [IB_QPT_UD] = (IB_QP_CUR_STATE |1558 IB_QP_QKEY),1559 [IB_QPT_UC] = (IB_QP_CUR_STATE |1560 IB_QP_ACCESS_FLAGS |1561 IB_QP_ALT_PATH |1562 IB_QP_PATH_MIG_STATE),1563 [IB_QPT_RC] = (IB_QP_CUR_STATE |1564 IB_QP_ACCESS_FLAGS |1565 IB_QP_ALT_PATH |1566 IB_QP_PATH_MIG_STATE |1567 IB_QP_MIN_RNR_TIMER),1568 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |1569 IB_QP_ACCESS_FLAGS |1570 IB_QP_ALT_PATH |1571 IB_QP_PATH_MIG_STATE),1572 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |1573 IB_QP_ACCESS_FLAGS |1574 IB_QP_ALT_PATH |1575 IB_QP_PATH_MIG_STATE |1576 IB_QP_MIN_RNR_TIMER),1577 [IB_QPT_SMI] = (IB_QP_CUR_STATE |1578 IB_QP_QKEY),1579 [IB_QPT_GSI] = (IB_QP_CUR_STATE |1580 IB_QP_QKEY),1581 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,1582 }1583 },1584 [IB_QPS_SQD] = {1585 .valid = 1,1586 .opt_param = {1587 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,1588 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,1589 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,1590 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,1591 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */1592 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,1593 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY1594 }1595 },1596 },1597 [IB_QPS_SQD] = {1598 [IB_QPS_RESET] = { .valid = 1 },1599 [IB_QPS_ERR] = { .valid = 1 },1600 [IB_QPS_RTS] = {1601 .valid = 1,1602 .opt_param = {1603 [IB_QPT_UD] = (IB_QP_CUR_STATE |1604 IB_QP_QKEY),1605 [IB_QPT_UC] = (IB_QP_CUR_STATE |1606 IB_QP_ALT_PATH |1607 IB_QP_ACCESS_FLAGS |1608 IB_QP_PATH_MIG_STATE),1609 [IB_QPT_RC] = (IB_QP_CUR_STATE |1610 IB_QP_ALT_PATH |1611 IB_QP_ACCESS_FLAGS |1612 IB_QP_MIN_RNR_TIMER |1613 IB_QP_PATH_MIG_STATE),1614 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |1615 IB_QP_ALT_PATH |1616 IB_QP_ACCESS_FLAGS |1617 IB_QP_PATH_MIG_STATE),1618 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |1619 IB_QP_ALT_PATH |1620 IB_QP_ACCESS_FLAGS |1621 IB_QP_MIN_RNR_TIMER |1622 IB_QP_PATH_MIG_STATE),1623 [IB_QPT_SMI] = (IB_QP_CUR_STATE |1624 IB_QP_QKEY),1625 [IB_QPT_GSI] = (IB_QP_CUR_STATE |1626 IB_QP_QKEY),1627 }1628 },1629 [IB_QPS_SQD] = {1630 .valid = 1,1631 .opt_param = {1632 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |1633 IB_QP_QKEY),1634 [IB_QPT_UC] = (IB_QP_AV |1635 IB_QP_ALT_PATH |1636 IB_QP_ACCESS_FLAGS |1637 IB_QP_PKEY_INDEX |1638 IB_QP_PATH_MIG_STATE),1639 [IB_QPT_RC] = (IB_QP_PORT |1640 IB_QP_AV |1641 IB_QP_TIMEOUT |1642 IB_QP_RETRY_CNT |1643 IB_QP_RNR_RETRY |1644 IB_QP_MAX_QP_RD_ATOMIC |1645 IB_QP_MAX_DEST_RD_ATOMIC |1646 IB_QP_ALT_PATH |1647 IB_QP_ACCESS_FLAGS |1648 IB_QP_PKEY_INDEX |1649 IB_QP_MIN_RNR_TIMER |1650 IB_QP_PATH_MIG_STATE),1651 [IB_QPT_XRC_INI] = (IB_QP_PORT |1652 IB_QP_AV |1653 IB_QP_TIMEOUT |1654 IB_QP_RETRY_CNT |1655 IB_QP_RNR_RETRY |1656 IB_QP_MAX_QP_RD_ATOMIC |1657 IB_QP_ALT_PATH |1658 IB_QP_ACCESS_FLAGS |1659 IB_QP_PKEY_INDEX |1660 IB_QP_PATH_MIG_STATE),1661 [IB_QPT_XRC_TGT] = (IB_QP_PORT |1662 IB_QP_AV |1663 IB_QP_TIMEOUT |1664 IB_QP_MAX_DEST_RD_ATOMIC |1665 IB_QP_ALT_PATH |1666 IB_QP_ACCESS_FLAGS |1667 IB_QP_PKEY_INDEX |1668 IB_QP_MIN_RNR_TIMER |1669 IB_QP_PATH_MIG_STATE),1670 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |1671 IB_QP_QKEY),1672 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |1673 IB_QP_QKEY),1674 }1675 }1676 },1677 [IB_QPS_SQE] = {1678 [IB_QPS_RESET] = { .valid = 1 },1679 [IB_QPS_ERR] = { .valid = 1 },1680 [IB_QPS_RTS] = {1681 .valid = 1,1682 .opt_param = {1683 [IB_QPT_UD] = (IB_QP_CUR_STATE |1684 IB_QP_QKEY),1685 [IB_QPT_UC] = (IB_QP_CUR_STATE |1686 IB_QP_ACCESS_FLAGS),1687 [IB_QPT_SMI] = (IB_QP_CUR_STATE |1688 IB_QP_QKEY),1689 [IB_QPT_GSI] = (IB_QP_CUR_STATE |1690 IB_QP_QKEY),1691 }1692 }1693 },1694 [IB_QPS_ERR] = {1695 [IB_QPS_RESET] = { .valid = 1 },1696 [IB_QPS_ERR] = { .valid = 1 }1697 }1698};1699 1700bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,1701 enum ib_qp_type type, enum ib_qp_attr_mask mask)1702{1703 enum ib_qp_attr_mask req_param, opt_param;1704 1705 if (mask & IB_QP_CUR_STATE &&1706 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&1707 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)1708 return false;1709 1710 if (!qp_state_table[cur_state][next_state].valid)1711 return false;1712 1713 req_param = qp_state_table[cur_state][next_state].req_param[type];1714 opt_param = qp_state_table[cur_state][next_state].opt_param[type];1715 1716 if ((mask & req_param) != req_param)1717 return false;1718 1719 if (mask & ~(req_param | opt_param | IB_QP_STATE))1720 return false;1721 1722 return true;1723}1724EXPORT_SYMBOL(ib_modify_qp_is_ok);1725 1726/**1727 * ib_resolve_eth_dmac - Resolve destination mac address1728 * @device: Device to consider1729 * @ah_attr: address handle attribute which describes the1730 * source and destination parameters1731 * ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It1732 * returns 0 on success or appropriate error code. It initializes the1733 * necessary ah_attr fields when call is successful.1734 */1735static int ib_resolve_eth_dmac(struct ib_device *device,1736 struct rdma_ah_attr *ah_attr)1737{1738 int ret = 0;1739 1740 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {1741 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {1742 __be32 addr = 0;1743 1744 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);1745 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);1746 } else {1747 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,1748 (char *)ah_attr->roce.dmac);1749 }1750 } else {1751 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);1752 }1753 return ret;1754}1755 1756static bool is_qp_type_connected(const struct ib_qp *qp)1757{1758 return (qp->qp_type == IB_QPT_UC ||1759 qp->qp_type == IB_QPT_RC ||1760 qp->qp_type == IB_QPT_XRC_INI ||1761 qp->qp_type == IB_QPT_XRC_TGT);1762}1763 1764/*1765 * IB core internal function to perform QP attributes modification.1766 */1767static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,1768 int attr_mask, struct ib_udata *udata)1769{1770 u32 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;1771 const struct ib_gid_attr *old_sgid_attr_av;1772 const struct ib_gid_attr *old_sgid_attr_alt_av;1773 int ret;1774 1775 attr->xmit_slave = NULL;1776 if (attr_mask & IB_QP_AV) {1777 ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr,1778 &old_sgid_attr_av);1779 if (ret)1780 return ret;1781 1782 if (attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE &&1783 is_qp_type_connected(qp)) {1784 struct net_device *slave;1785 1786 /*1787 * If the user provided the qp_attr then we have to1788 * resolve it. Kerne users have to provide already1789 * resolved rdma_ah_attr's.1790 */1791 if (udata) {1792 ret = ib_resolve_eth_dmac(qp->device,1793 &attr->ah_attr);1794 if (ret)1795 goto out_av;1796 }1797 slave = rdma_lag_get_ah_roce_slave(qp->device,1798 &attr->ah_attr,1799 GFP_KERNEL);1800 if (IS_ERR(slave)) {1801 ret = PTR_ERR(slave);1802 goto out_av;1803 }1804 attr->xmit_slave = slave;1805 }1806 }1807 if (attr_mask & IB_QP_ALT_PATH) {1808 /*1809 * FIXME: This does not track the migration state, so if the1810 * user loads a new alternate path after the HW has migrated1811 * from primary->alternate we will keep the wrong1812 * references. This is OK for IB because the reference1813 * counting does not serve any functional purpose.1814 */1815 ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,1816 &old_sgid_attr_alt_av);1817 if (ret)1818 goto out_av;1819 1820 /*1821 * Today the core code can only handle alternate paths and APM1822 * for IB. Ban them in roce mode.1823 */1824 if (!(rdma_protocol_ib(qp->device,1825 attr->alt_ah_attr.port_num) &&1826 rdma_protocol_ib(qp->device, port))) {1827 ret = -EINVAL;1828 goto out;1829 }1830 }1831 1832 if (rdma_ib_or_roce(qp->device, port)) {1833 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {1834 dev_warn(&qp->device->dev,1835 "%s rq_psn overflow, masking to 24 bits\n",1836 __func__);1837 attr->rq_psn &= 0xffffff;1838 }1839 1840 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {1841 dev_warn(&qp->device->dev,1842 " %s sq_psn overflow, masking to 24 bits\n",1843 __func__);1844 attr->sq_psn &= 0xffffff;1845 }1846 }1847 1848 /*1849 * Bind this qp to a counter automatically based on the rdma counter1850 * rules. This only set in RST2INIT with port specified1851 */1852 if (!qp->counter && (attr_mask & IB_QP_PORT) &&1853 ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT))1854 rdma_counter_bind_qp_auto(qp, attr->port_num);1855 1856 ret = ib_security_modify_qp(qp, attr, attr_mask, udata);1857 if (ret)1858 goto out;1859 1860 if (attr_mask & IB_QP_PORT)1861 qp->port = attr->port_num;1862 if (attr_mask & IB_QP_AV)1863 qp->av_sgid_attr =1864 rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr);1865 if (attr_mask & IB_QP_ALT_PATH)1866 qp->alt_path_sgid_attr = rdma_update_sgid_attr(1867 &attr->alt_ah_attr, qp->alt_path_sgid_attr);1868 1869out:1870 if (attr_mask & IB_QP_ALT_PATH)1871 rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av);1872out_av:1873 if (attr_mask & IB_QP_AV) {1874 rdma_lag_put_ah_roce_slave(attr->xmit_slave);1875 rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av);1876 }1877 return ret;1878}1879 1880/**1881 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.1882 * @ib_qp: The QP to modify.1883 * @attr: On input, specifies the QP attributes to modify. On output,1884 * the current values of selected QP attributes are returned.1885 * @attr_mask: A bit-mask used to specify which attributes of the QP1886 * are being modified.1887 * @udata: pointer to user's input output buffer information1888 * are being modified.1889 * It returns 0 on success and returns appropriate error code on error.1890 */1891int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,1892 int attr_mask, struct ib_udata *udata)1893{1894 return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);1895}1896EXPORT_SYMBOL(ib_modify_qp_with_udata);1897 1898static void ib_get_width_and_speed(u32 netdev_speed, u32 lanes,1899 u16 *speed, u8 *width)1900{1901 if (!lanes) {1902 if (netdev_speed <= SPEED_1000) {1903 *width = IB_WIDTH_1X;1904 *speed = IB_SPEED_SDR;1905 } else if (netdev_speed <= SPEED_10000) {1906 *width = IB_WIDTH_1X;1907 *speed = IB_SPEED_FDR10;1908 } else if (netdev_speed <= SPEED_20000) {1909 *width = IB_WIDTH_4X;1910 *speed = IB_SPEED_DDR;1911 } else if (netdev_speed <= SPEED_25000) {1912 *width = IB_WIDTH_1X;1913 *speed = IB_SPEED_EDR;1914 } else if (netdev_speed <= SPEED_40000) {1915 *width = IB_WIDTH_4X;1916 *speed = IB_SPEED_FDR10;1917 } else if (netdev_speed <= SPEED_50000) {1918 *width = IB_WIDTH_2X;1919 *speed = IB_SPEED_EDR;1920 } else if (netdev_speed <= SPEED_100000) {1921 *width = IB_WIDTH_4X;1922 *speed = IB_SPEED_EDR;1923 } else if (netdev_speed <= SPEED_200000) {1924 *width = IB_WIDTH_4X;1925 *speed = IB_SPEED_HDR;1926 } else {1927 *width = IB_WIDTH_4X;1928 *speed = IB_SPEED_NDR;1929 }1930 1931 return;1932 }1933 1934 switch (lanes) {1935 case 1:1936 *width = IB_WIDTH_1X;1937 break;1938 case 2:1939 *width = IB_WIDTH_2X;1940 break;1941 case 4:1942 *width = IB_WIDTH_4X;1943 break;1944 case 8:1945 *width = IB_WIDTH_8X;1946 break;1947 case 12:1948 *width = IB_WIDTH_12X;1949 break;1950 default:1951 *width = IB_WIDTH_1X;1952 }1953 1954 switch (netdev_speed / lanes) {1955 case SPEED_2500:1956 *speed = IB_SPEED_SDR;1957 break;1958 case SPEED_5000:1959 *speed = IB_SPEED_DDR;1960 break;1961 case SPEED_10000:1962 *speed = IB_SPEED_FDR10;1963 break;1964 case SPEED_14000:1965 *speed = IB_SPEED_FDR;1966 break;1967 case SPEED_25000:1968 *speed = IB_SPEED_EDR;1969 break;1970 case SPEED_50000:1971 *speed = IB_SPEED_HDR;1972 break;1973 case SPEED_100000:1974 *speed = IB_SPEED_NDR;1975 break;1976 default:1977 *speed = IB_SPEED_SDR;1978 }1979}1980 1981int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed, u8 *width)1982{1983 int rc;1984 u32 netdev_speed;1985 struct net_device *netdev;1986 struct ethtool_link_ksettings lksettings = {};1987 1988 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET)1989 return -EINVAL;1990 1991 netdev = ib_device_get_netdev(dev, port_num);1992 if (!netdev)1993 return -ENODEV;1994 1995 rtnl_lock();1996 rc = __ethtool_get_link_ksettings(netdev, &lksettings);1997 rtnl_unlock();1998 1999 dev_put(netdev);2000 2001 if (!rc && lksettings.base.speed != (u32)SPEED_UNKNOWN) {2002 netdev_speed = lksettings.base.speed;2003 } else {2004 netdev_speed = SPEED_1000;2005 if (rc)2006 pr_warn("%s speed is unknown, defaulting to %u\n",2007 netdev->name, netdev_speed);2008 }2009 2010 ib_get_width_and_speed(netdev_speed, lksettings.lanes,2011 speed, width);2012 2013 return 0;2014}2015EXPORT_SYMBOL(ib_get_eth_speed);2016 2017int ib_modify_qp(struct ib_qp *qp,2018 struct ib_qp_attr *qp_attr,2019 int qp_attr_mask)2020{2021 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);2022}2023EXPORT_SYMBOL(ib_modify_qp);2024 2025int ib_query_qp(struct ib_qp *qp,2026 struct ib_qp_attr *qp_attr,2027 int qp_attr_mask,2028 struct ib_qp_init_attr *qp_init_attr)2029{2030 qp_attr->ah_attr.grh.sgid_attr = NULL;2031 qp_attr->alt_ah_attr.grh.sgid_attr = NULL;2032 2033 return qp->device->ops.query_qp ?2034 qp->device->ops.query_qp(qp->real_qp, qp_attr, qp_attr_mask,2035 qp_init_attr) : -EOPNOTSUPP;2036}2037EXPORT_SYMBOL(ib_query_qp);2038 2039int ib_close_qp(struct ib_qp *qp)2040{2041 struct ib_qp *real_qp;2042 unsigned long flags;2043 2044 real_qp = qp->real_qp;2045 if (real_qp == qp)2046 return -EINVAL;2047 2048 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);2049 list_del(&qp->open_list);2050 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);2051 2052 atomic_dec(&real_qp->usecnt);2053 if (qp->qp_sec)2054 ib_close_shared_qp_security(qp->qp_sec);2055 kfree(qp);2056 2057 return 0;2058}2059EXPORT_SYMBOL(ib_close_qp);2060 2061static int __ib_destroy_shared_qp(struct ib_qp *qp)2062{2063 struct ib_xrcd *xrcd;2064 struct ib_qp *real_qp;2065 int ret;2066 2067 real_qp = qp->real_qp;2068 xrcd = real_qp->xrcd;2069 down_write(&xrcd->tgt_qps_rwsem);2070 ib_close_qp(qp);2071 if (atomic_read(&real_qp->usecnt) == 0)2072 xa_erase(&xrcd->tgt_qps, real_qp->qp_num);2073 else2074 real_qp = NULL;2075 up_write(&xrcd->tgt_qps_rwsem);2076 2077 if (real_qp) {2078 ret = ib_destroy_qp(real_qp);2079 if (!ret)2080 atomic_dec(&xrcd->usecnt);2081 }2082 2083 return 0;2084}2085 2086int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata)2087{2088 const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr;2089 const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr;2090 struct ib_qp_security *sec;2091 int ret;2092 2093 WARN_ON_ONCE(qp->mrs_used > 0);2094 2095 if (atomic_read(&qp->usecnt))2096 return -EBUSY;2097 2098 if (qp->real_qp != qp)2099 return __ib_destroy_shared_qp(qp);2100 2101 sec = qp->qp_sec;2102 if (sec)2103 ib_destroy_qp_security_begin(sec);2104 2105 if (!qp->uobject)2106 rdma_rw_cleanup_mrs(qp);2107 2108 rdma_counter_unbind_qp(qp, true);2109 ret = qp->device->ops.destroy_qp(qp, udata);2110 if (ret) {2111 if (sec)2112 ib_destroy_qp_security_abort(sec);2113 return ret;2114 }2115 2116 if (alt_path_sgid_attr)2117 rdma_put_gid_attr(alt_path_sgid_attr);2118 if (av_sgid_attr)2119 rdma_put_gid_attr(av_sgid_attr);2120 2121 ib_qp_usecnt_dec(qp);2122 if (sec)2123 ib_destroy_qp_security_end(sec);2124 2125 rdma_restrack_del(&qp->res);2126 kfree(qp);2127 return ret;2128}2129EXPORT_SYMBOL(ib_destroy_qp_user);2130 2131/* Completion queues */2132 2133struct ib_cq *__ib_create_cq(struct ib_device *device,2134 ib_comp_handler comp_handler,2135 void (*event_handler)(struct ib_event *, void *),2136 void *cq_context,2137 const struct ib_cq_init_attr *cq_attr,2138 const char *caller)2139{2140 struct ib_cq *cq;2141 int ret;2142 2143 cq = rdma_zalloc_drv_obj(device, ib_cq);2144 if (!cq)2145 return ERR_PTR(-ENOMEM);2146 2147 cq->device = device;2148 cq->uobject = NULL;2149 cq->comp_handler = comp_handler;2150 cq->event_handler = event_handler;2151 cq->cq_context = cq_context;2152 atomic_set(&cq->usecnt, 0);2153 2154 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);2155 rdma_restrack_set_name(&cq->res, caller);2156 2157 ret = device->ops.create_cq(cq, cq_attr, NULL);2158 if (ret) {2159 rdma_restrack_put(&cq->res);2160 kfree(cq);2161 return ERR_PTR(ret);2162 }2163 2164 rdma_restrack_add(&cq->res);2165 return cq;2166}2167EXPORT_SYMBOL(__ib_create_cq);2168 2169int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)2170{2171 if (cq->shared)2172 return -EOPNOTSUPP;2173 2174 return cq->device->ops.modify_cq ?2175 cq->device->ops.modify_cq(cq, cq_count,2176 cq_period) : -EOPNOTSUPP;2177}2178EXPORT_SYMBOL(rdma_set_cq_moderation);2179 2180int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)2181{2182 int ret;2183 2184 if (WARN_ON_ONCE(cq->shared))2185 return -EOPNOTSUPP;2186 2187 if (atomic_read(&cq->usecnt))2188 return -EBUSY;2189 2190 ret = cq->device->ops.destroy_cq(cq, udata);2191 if (ret)2192 return ret;2193 2194 rdma_restrack_del(&cq->res);2195 kfree(cq);2196 return ret;2197}2198EXPORT_SYMBOL(ib_destroy_cq_user);2199 2200int ib_resize_cq(struct ib_cq *cq, int cqe)2201{2202 if (cq->shared)2203 return -EOPNOTSUPP;2204 2205 return cq->device->ops.resize_cq ?2206 cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;2207}2208EXPORT_SYMBOL(ib_resize_cq);2209 2210/* Memory regions */2211 2212struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,2213 u64 virt_addr, int access_flags)2214{2215 struct ib_mr *mr;2216 2217 if (access_flags & IB_ACCESS_ON_DEMAND) {2218 if (!(pd->device->attrs.kernel_cap_flags &2219 IBK_ON_DEMAND_PAGING)) {2220 pr_debug("ODP support not available\n");2221 return ERR_PTR(-EINVAL);2222 }2223 }2224 2225 mr = pd->device->ops.reg_user_mr(pd, start, length, virt_addr,2226 access_flags, NULL);2227 2228 if (IS_ERR(mr))2229 return mr;2230 2231 mr->device = pd->device;2232 mr->type = IB_MR_TYPE_USER;2233 mr->pd = pd;2234 mr->dm = NULL;2235 atomic_inc(&pd->usecnt);2236 mr->iova = virt_addr;2237 mr->length = length;2238 2239 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);2240 rdma_restrack_parent_name(&mr->res, &pd->res);2241 rdma_restrack_add(&mr->res);2242 2243 return mr;2244}2245EXPORT_SYMBOL(ib_reg_user_mr);2246 2247int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,2248 u32 flags, struct ib_sge *sg_list, u32 num_sge)2249{2250 if (!pd->device->ops.advise_mr)2251 return -EOPNOTSUPP;2252 2253 if (!num_sge)2254 return 0;2255 2256 return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge,2257 NULL);2258}2259EXPORT_SYMBOL(ib_advise_mr);2260 2261int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)2262{2263 struct ib_pd *pd = mr->pd;2264 struct ib_dm *dm = mr->dm;2265 struct ib_sig_attrs *sig_attrs = mr->sig_attrs;2266 int ret;2267 2268 trace_mr_dereg(mr);2269 rdma_restrack_del(&mr->res);2270 ret = mr->device->ops.dereg_mr(mr, udata);2271 if (!ret) {2272 atomic_dec(&pd->usecnt);2273 if (dm)2274 atomic_dec(&dm->usecnt);2275 kfree(sig_attrs);2276 }2277 2278 return ret;2279}2280EXPORT_SYMBOL(ib_dereg_mr_user);2281 2282/**2283 * ib_alloc_mr() - Allocates a memory region2284 * @pd: protection domain associated with the region2285 * @mr_type: memory region type2286 * @max_num_sg: maximum sg entries available for registration.2287 *2288 * Notes:2289 * Memory registeration page/sg lists must not exceed max_num_sg.2290 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed2291 * max_num_sg * used_page_size.2292 *2293 */2294struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,2295 u32 max_num_sg)2296{2297 struct ib_mr *mr;2298 2299 if (!pd->device->ops.alloc_mr) {2300 mr = ERR_PTR(-EOPNOTSUPP);2301 goto out;2302 }2303 2304 if (mr_type == IB_MR_TYPE_INTEGRITY) {2305 WARN_ON_ONCE(1);2306 mr = ERR_PTR(-EINVAL);2307 goto out;2308 }2309 2310 mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg);2311 if (IS_ERR(mr))2312 goto out;2313 2314 mr->device = pd->device;2315 mr->pd = pd;2316 mr->dm = NULL;2317 mr->uobject = NULL;2318 atomic_inc(&pd->usecnt);2319 mr->need_inval = false;2320 mr->type = mr_type;2321 mr->sig_attrs = NULL;2322 2323 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);2324 rdma_restrack_parent_name(&mr->res, &pd->res);2325 rdma_restrack_add(&mr->res);2326out:2327 trace_mr_alloc(pd, mr_type, max_num_sg, mr);2328 return mr;2329}2330EXPORT_SYMBOL(ib_alloc_mr);2331 2332/**2333 * ib_alloc_mr_integrity() - Allocates an integrity memory region2334 * @pd: protection domain associated with the region2335 * @max_num_data_sg: maximum data sg entries available for registration2336 * @max_num_meta_sg: maximum metadata sg entries available for2337 * registration2338 *2339 * Notes:2340 * Memory registration page/sg lists must not exceed max_num_sg,2341 * also the integrity page/sg lists must not exceed max_num_meta_sg.2342 *2343 */2344struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,2345 u32 max_num_data_sg,2346 u32 max_num_meta_sg)2347{2348 struct ib_mr *mr;2349 struct ib_sig_attrs *sig_attrs;2350 2351 if (!pd->device->ops.alloc_mr_integrity ||2352 !pd->device->ops.map_mr_sg_pi) {2353 mr = ERR_PTR(-EOPNOTSUPP);2354 goto out;2355 }2356 2357 if (!max_num_meta_sg) {2358 mr = ERR_PTR(-EINVAL);2359 goto out;2360 }2361 2362 sig_attrs = kzalloc(sizeof(struct ib_sig_attrs), GFP_KERNEL);2363 if (!sig_attrs) {2364 mr = ERR_PTR(-ENOMEM);2365 goto out;2366 }2367 2368 mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,2369 max_num_meta_sg);2370 if (IS_ERR(mr)) {2371 kfree(sig_attrs);2372 goto out;2373 }2374 2375 mr->device = pd->device;2376 mr->pd = pd;2377 mr->dm = NULL;2378 mr->uobject = NULL;2379 atomic_inc(&pd->usecnt);2380 mr->need_inval = false;2381 mr->type = IB_MR_TYPE_INTEGRITY;2382 mr->sig_attrs = sig_attrs;2383 2384 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);2385 rdma_restrack_parent_name(&mr->res, &pd->res);2386 rdma_restrack_add(&mr->res);2387out:2388 trace_mr_integ_alloc(pd, max_num_data_sg, max_num_meta_sg, mr);2389 return mr;2390}2391EXPORT_SYMBOL(ib_alloc_mr_integrity);2392 2393/* Multicast groups */2394 2395static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)2396{2397 struct ib_qp_init_attr init_attr = {};2398 struct ib_qp_attr attr = {};2399 int num_eth_ports = 0;2400 unsigned int port;2401 2402 /* If QP state >= init, it is assigned to a port and we can check this2403 * port only.2404 */2405 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {2406 if (attr.qp_state >= IB_QPS_INIT) {2407 if (rdma_port_get_link_layer(qp->device, attr.port_num) !=2408 IB_LINK_LAYER_INFINIBAND)2409 return true;2410 goto lid_check;2411 }2412 }2413 2414 /* Can't get a quick answer, iterate over all ports */2415 rdma_for_each_port(qp->device, port)2416 if (rdma_port_get_link_layer(qp->device, port) !=2417 IB_LINK_LAYER_INFINIBAND)2418 num_eth_ports++;2419 2420 /* If we have at lease one Ethernet port, RoCE annex declares that2421 * multicast LID should be ignored. We can't tell at this step if the2422 * QP belongs to an IB or Ethernet port.2423 */2424 if (num_eth_ports)2425 return true;2426 2427 /* If all the ports are IB, we can check according to IB spec. */2428lid_check:2429 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||2430 lid == be16_to_cpu(IB_LID_PERMISSIVE));2431}2432 2433int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)2434{2435 int ret;2436 2437 if (!qp->device->ops.attach_mcast)2438 return -EOPNOTSUPP;2439 2440 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||2441 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))2442 return -EINVAL;2443 2444 ret = qp->device->ops.attach_mcast(qp, gid, lid);2445 if (!ret)2446 atomic_inc(&qp->usecnt);2447 return ret;2448}2449EXPORT_SYMBOL(ib_attach_mcast);2450 2451int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)2452{2453 int ret;2454 2455 if (!qp->device->ops.detach_mcast)2456 return -EOPNOTSUPP;2457 2458 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||2459 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))2460 return -EINVAL;2461 2462 ret = qp->device->ops.detach_mcast(qp, gid, lid);2463 if (!ret)2464 atomic_dec(&qp->usecnt);2465 return ret;2466}2467EXPORT_SYMBOL(ib_detach_mcast);2468 2469/**2470 * ib_alloc_xrcd_user - Allocates an XRC domain.2471 * @device: The device on which to allocate the XRC domain.2472 * @inode: inode to connect XRCD2473 * @udata: Valid user data or NULL for kernel object2474 */2475struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device,2476 struct inode *inode, struct ib_udata *udata)2477{2478 struct ib_xrcd *xrcd;2479 int ret;2480 2481 if (!device->ops.alloc_xrcd)2482 return ERR_PTR(-EOPNOTSUPP);2483 2484 xrcd = rdma_zalloc_drv_obj(device, ib_xrcd);2485 if (!xrcd)2486 return ERR_PTR(-ENOMEM);2487 2488 xrcd->device = device;2489 xrcd->inode = inode;2490 atomic_set(&xrcd->usecnt, 0);2491 init_rwsem(&xrcd->tgt_qps_rwsem);2492 xa_init(&xrcd->tgt_qps);2493 2494 ret = device->ops.alloc_xrcd(xrcd, udata);2495 if (ret)2496 goto err;2497 return xrcd;2498err:2499 kfree(xrcd);2500 return ERR_PTR(ret);2501}2502EXPORT_SYMBOL(ib_alloc_xrcd_user);2503 2504/**2505 * ib_dealloc_xrcd_user - Deallocates an XRC domain.2506 * @xrcd: The XRC domain to deallocate.2507 * @udata: Valid user data or NULL for kernel object2508 */2509int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata)2510{2511 int ret;2512 2513 if (atomic_read(&xrcd->usecnt))2514 return -EBUSY;2515 2516 WARN_ON(!xa_empty(&xrcd->tgt_qps));2517 ret = xrcd->device->ops.dealloc_xrcd(xrcd, udata);2518 if (ret)2519 return ret;2520 kfree(xrcd);2521 return ret;2522}2523EXPORT_SYMBOL(ib_dealloc_xrcd_user);2524 2525/**2526 * ib_create_wq - Creates a WQ associated with the specified protection2527 * domain.2528 * @pd: The protection domain associated with the WQ.2529 * @wq_attr: A list of initial attributes required to create the2530 * WQ. If WQ creation succeeds, then the attributes are updated to2531 * the actual capabilities of the created WQ.2532 *2533 * wq_attr->max_wr and wq_attr->max_sge determine2534 * the requested size of the WQ, and set to the actual values allocated2535 * on return.2536 * If ib_create_wq() succeeds, then max_wr and max_sge will always be2537 * at least as large as the requested values.2538 */2539struct ib_wq *ib_create_wq(struct ib_pd *pd,2540 struct ib_wq_init_attr *wq_attr)2541{2542 struct ib_wq *wq;2543 2544 if (!pd->device->ops.create_wq)2545 return ERR_PTR(-EOPNOTSUPP);2546 2547 wq = pd->device->ops.create_wq(pd, wq_attr, NULL);2548 if (!IS_ERR(wq)) {2549 wq->event_handler = wq_attr->event_handler;2550 wq->wq_context = wq_attr->wq_context;2551 wq->wq_type = wq_attr->wq_type;2552 wq->cq = wq_attr->cq;2553 wq->device = pd->device;2554 wq->pd = pd;2555 wq->uobject = NULL;2556 atomic_inc(&pd->usecnt);2557 atomic_inc(&wq_attr->cq->usecnt);2558 atomic_set(&wq->usecnt, 0);2559 }2560 return wq;2561}2562EXPORT_SYMBOL(ib_create_wq);2563 2564/**2565 * ib_destroy_wq_user - Destroys the specified user WQ.2566 * @wq: The WQ to destroy.2567 * @udata: Valid user data2568 */2569int ib_destroy_wq_user(struct ib_wq *wq, struct ib_udata *udata)2570{2571 struct ib_cq *cq = wq->cq;2572 struct ib_pd *pd = wq->pd;2573 int ret;2574 2575 if (atomic_read(&wq->usecnt))2576 return -EBUSY;2577 2578 ret = wq->device->ops.destroy_wq(wq, udata);2579 if (ret)2580 return ret;2581 2582 atomic_dec(&pd->usecnt);2583 atomic_dec(&cq->usecnt);2584 return ret;2585}2586EXPORT_SYMBOL(ib_destroy_wq_user);2587 2588int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,2589 struct ib_mr_status *mr_status)2590{2591 if (!mr->device->ops.check_mr_status)2592 return -EOPNOTSUPP;2593 2594 return mr->device->ops.check_mr_status(mr, check_mask, mr_status);2595}2596EXPORT_SYMBOL(ib_check_mr_status);2597 2598int ib_set_vf_link_state(struct ib_device *device, int vf, u32 port,2599 int state)2600{2601 if (!device->ops.set_vf_link_state)2602 return -EOPNOTSUPP;2603 2604 return device->ops.set_vf_link_state(device, vf, port, state);2605}2606EXPORT_SYMBOL(ib_set_vf_link_state);2607 2608int ib_get_vf_config(struct ib_device *device, int vf, u32 port,2609 struct ifla_vf_info *info)2610{2611 if (!device->ops.get_vf_config)2612 return -EOPNOTSUPP;2613 2614 return device->ops.get_vf_config(device, vf, port, info);2615}2616EXPORT_SYMBOL(ib_get_vf_config);2617 2618int ib_get_vf_stats(struct ib_device *device, int vf, u32 port,2619 struct ifla_vf_stats *stats)2620{2621 if (!device->ops.get_vf_stats)2622 return -EOPNOTSUPP;2623 2624 return device->ops.get_vf_stats(device, vf, port, stats);2625}2626EXPORT_SYMBOL(ib_get_vf_stats);2627 2628int ib_set_vf_guid(struct ib_device *device, int vf, u32 port, u64 guid,2629 int type)2630{2631 if (!device->ops.set_vf_guid)2632 return -EOPNOTSUPP;2633 2634 return device->ops.set_vf_guid(device, vf, port, guid, type);2635}2636EXPORT_SYMBOL(ib_set_vf_guid);2637 2638int ib_get_vf_guid(struct ib_device *device, int vf, u32 port,2639 struct ifla_vf_guid *node_guid,2640 struct ifla_vf_guid *port_guid)2641{2642 if (!device->ops.get_vf_guid)2643 return -EOPNOTSUPP;2644 2645 return device->ops.get_vf_guid(device, vf, port, node_guid, port_guid);2646}2647EXPORT_SYMBOL(ib_get_vf_guid);2648/**2649 * ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection2650 * information) and set an appropriate memory region for registration.2651 * @mr: memory region2652 * @data_sg: dma mapped scatterlist for data2653 * @data_sg_nents: number of entries in data_sg2654 * @data_sg_offset: offset in bytes into data_sg2655 * @meta_sg: dma mapped scatterlist for metadata2656 * @meta_sg_nents: number of entries in meta_sg2657 * @meta_sg_offset: offset in bytes into meta_sg2658 * @page_size: page vector desired page size2659 *2660 * Constraints:2661 * - The MR must be allocated with type IB_MR_TYPE_INTEGRITY.2662 *2663 * Return: 0 on success.2664 *2665 * After this completes successfully, the memory region2666 * is ready for registration.2667 */2668int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg,2669 int data_sg_nents, unsigned int *data_sg_offset,2670 struct scatterlist *meta_sg, int meta_sg_nents,2671 unsigned int *meta_sg_offset, unsigned int page_size)2672{2673 if (unlikely(!mr->device->ops.map_mr_sg_pi ||2674 WARN_ON_ONCE(mr->type != IB_MR_TYPE_INTEGRITY)))2675 return -EOPNOTSUPP;2676 2677 mr->page_size = page_size;2678 2679 return mr->device->ops.map_mr_sg_pi(mr, data_sg, data_sg_nents,2680 data_sg_offset, meta_sg,2681 meta_sg_nents, meta_sg_offset);2682}2683EXPORT_SYMBOL(ib_map_mr_sg_pi);2684 2685/**2686 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list2687 * and set it the memory region.2688 * @mr: memory region2689 * @sg: dma mapped scatterlist2690 * @sg_nents: number of entries in sg2691 * @sg_offset: offset in bytes into sg2692 * @page_size: page vector desired page size2693 *2694 * Constraints:2695 *2696 * - The first sg element is allowed to have an offset.2697 * - Each sg element must either be aligned to page_size or virtually2698 * contiguous to the previous element. In case an sg element has a2699 * non-contiguous offset, the mapping prefix will not include it.2700 * - The last sg element is allowed to have length less than page_size.2701 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size2702 * then only max_num_sg entries will be mapped.2703 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these2704 * constraints holds and the page_size argument is ignored.2705 *2706 * Returns the number of sg elements that were mapped to the memory region.2707 *2708 * After this completes successfully, the memory region2709 * is ready for registration.2710 */2711int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,2712 unsigned int *sg_offset, unsigned int page_size)2713{2714 if (unlikely(!mr->device->ops.map_mr_sg))2715 return -EOPNOTSUPP;2716 2717 mr->page_size = page_size;2718 2719 return mr->device->ops.map_mr_sg(mr, sg, sg_nents, sg_offset);2720}2721EXPORT_SYMBOL(ib_map_mr_sg);2722 2723/**2724 * ib_sg_to_pages() - Convert the largest prefix of a sg list2725 * to a page vector2726 * @mr: memory region2727 * @sgl: dma mapped scatterlist2728 * @sg_nents: number of entries in sg2729 * @sg_offset_p: ==== =======================================================2730 * IN start offset in bytes into sg2731 * OUT offset in bytes for element n of the sg of the first2732 * byte that has not been processed where n is the return2733 * value of this function.2734 * ==== =======================================================2735 * @set_page: driver page assignment function pointer2736 *2737 * Core service helper for drivers to convert the largest2738 * prefix of given sg list to a page vector. The sg list2739 * prefix converted is the prefix that meet the requirements2740 * of ib_map_mr_sg.2741 *2742 * Returns the number of sg elements that were assigned to2743 * a page vector.2744 */2745int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,2746 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))2747{2748 struct scatterlist *sg;2749 u64 last_end_dma_addr = 0;2750 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;2751 unsigned int last_page_off = 0;2752 u64 page_mask = ~((u64)mr->page_size - 1);2753 int i, ret;2754 2755 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))2756 return -EINVAL;2757 2758 mr->iova = sg_dma_address(&sgl[0]) + sg_offset;2759 mr->length = 0;2760 2761 for_each_sg(sgl, sg, sg_nents, i) {2762 u64 dma_addr = sg_dma_address(sg) + sg_offset;2763 u64 prev_addr = dma_addr;2764 unsigned int dma_len = sg_dma_len(sg) - sg_offset;2765 u64 end_dma_addr = dma_addr + dma_len;2766 u64 page_addr = dma_addr & page_mask;2767 2768 /*2769 * For the second and later elements, check whether either the2770 * end of element i-1 or the start of element i is not aligned2771 * on a page boundary.2772 */2773 if (i && (last_page_off != 0 || page_addr != dma_addr)) {2774 /* Stop mapping if there is a gap. */2775 if (last_end_dma_addr != dma_addr)2776 break;2777 2778 /*2779 * Coalesce this element with the last. If it is small2780 * enough just update mr->length. Otherwise start2781 * mapping from the next page.2782 */2783 goto next_page;2784 }2785 2786 do {2787 ret = set_page(mr, page_addr);2788 if (unlikely(ret < 0)) {2789 sg_offset = prev_addr - sg_dma_address(sg);2790 mr->length += prev_addr - dma_addr;2791 if (sg_offset_p)2792 *sg_offset_p = sg_offset;2793 return i || sg_offset ? i : ret;2794 }2795 prev_addr = page_addr;2796next_page:2797 page_addr += mr->page_size;2798 } while (page_addr < end_dma_addr);2799 2800 mr->length += dma_len;2801 last_end_dma_addr = end_dma_addr;2802 last_page_off = end_dma_addr & ~page_mask;2803 2804 sg_offset = 0;2805 }2806 2807 if (sg_offset_p)2808 *sg_offset_p = 0;2809 return i;2810}2811EXPORT_SYMBOL(ib_sg_to_pages);2812 2813struct ib_drain_cqe {2814 struct ib_cqe cqe;2815 struct completion done;2816};2817 2818static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)2819{2820 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,2821 cqe);2822 2823 complete(&cqe->done);2824}2825 2826/*2827 * Post a WR and block until its completion is reaped for the SQ.2828 */2829static void __ib_drain_sq(struct ib_qp *qp)2830{2831 struct ib_cq *cq = qp->send_cq;2832 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };2833 struct ib_drain_cqe sdrain;2834 struct ib_rdma_wr swr = {2835 .wr = {2836 .next = NULL,2837 { .wr_cqe = &sdrain.cqe, },2838 .opcode = IB_WR_RDMA_WRITE,2839 },2840 };2841 int ret;2842 2843 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);2844 if (ret) {2845 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);2846 return;2847 }2848 2849 sdrain.cqe.done = ib_drain_qp_done;2850 init_completion(&sdrain.done);2851 2852 ret = ib_post_send(qp, &swr.wr, NULL);2853 if (ret) {2854 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);2855 return;2856 }2857 2858 if (cq->poll_ctx == IB_POLL_DIRECT)2859 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)2860 ib_process_cq_direct(cq, -1);2861 else2862 wait_for_completion(&sdrain.done);2863}2864 2865/*2866 * Post a WR and block until its completion is reaped for the RQ.2867 */2868static void __ib_drain_rq(struct ib_qp *qp)2869{2870 struct ib_cq *cq = qp->recv_cq;2871 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };2872 struct ib_drain_cqe rdrain;2873 struct ib_recv_wr rwr = {};2874 int ret;2875 2876 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);2877 if (ret) {2878 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);2879 return;2880 }2881 2882 rwr.wr_cqe = &rdrain.cqe;2883 rdrain.cqe.done = ib_drain_qp_done;2884 init_completion(&rdrain.done);2885 2886 ret = ib_post_recv(qp, &rwr, NULL);2887 if (ret) {2888 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);2889 return;2890 }2891 2892 if (cq->poll_ctx == IB_POLL_DIRECT)2893 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)2894 ib_process_cq_direct(cq, -1);2895 else2896 wait_for_completion(&rdrain.done);2897}2898 2899/*2900 * __ib_drain_srq() - Block until Last WQE Reached event arrives, or timeout2901 * expires.2902 * @qp: queue pair associated with SRQ to drain2903 *2904 * Quoting 10.3.1 Queue Pair and EE Context States:2905 *2906 * Note, for QPs that are associated with an SRQ, the Consumer should take the2907 * QP through the Error State before invoking a Destroy QP or a Modify QP to the2908 * Reset State. The Consumer may invoke the Destroy QP without first performing2909 * a Modify QP to the Error State and waiting for the Affiliated Asynchronous2910 * Last WQE Reached Event. However, if the Consumer does not wait for the2911 * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment2912 * leakage may occur. Therefore, it is good programming practice to tear down a2913 * QP that is associated with an SRQ by using the following process:2914 *2915 * - Put the QP in the Error State2916 * - Wait for the Affiliated Asynchronous Last WQE Reached Event;2917 * - either:2918 * drain the CQ by invoking the Poll CQ verb and either wait for CQ2919 * to be empty or the number of Poll CQ operations has exceeded2920 * CQ capacity size;2921 * - or2922 * post another WR that completes on the same CQ and wait for this2923 * WR to return as a WC;2924 * - and then invoke a Destroy QP or Reset QP.2925 *2926 * We use the first option.2927 */2928static void __ib_drain_srq(struct ib_qp *qp)2929{2930 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };2931 struct ib_cq *cq;2932 int n, polled = 0;2933 int ret;2934 2935 if (!qp->srq) {2936 WARN_ONCE(1, "QP 0x%p is not associated with SRQ\n", qp);2937 return;2938 }2939 2940 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);2941 if (ret) {2942 WARN_ONCE(ret, "failed to drain shared recv queue: %d\n", ret);2943 return;2944 }2945 2946 if (ib_srq_has_cq(qp->srq->srq_type)) {2947 cq = qp->srq->ext.cq;2948 } else if (qp->recv_cq) {2949 cq = qp->recv_cq;2950 } else {2951 WARN_ONCE(1, "QP 0x%p has no CQ associated with SRQ\n", qp);2952 return;2953 }2954 2955 if (wait_for_completion_timeout(&qp->srq_completion, 60 * HZ) > 0) {2956 while (polled != cq->cqe) {2957 n = ib_process_cq_direct(cq, cq->cqe - polled);2958 if (!n)2959 return;2960 polled += n;2961 }2962 }2963}2964 2965/**2966 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the2967 * application.2968 * @qp: queue pair to drain2969 *2970 * If the device has a provider-specific drain function, then2971 * call that. Otherwise call the generic drain function2972 * __ib_drain_sq().2973 *2974 * The caller must:2975 *2976 * ensure there is room in the CQ and SQ for the drain work request and2977 * completion.2978 *2979 * allocate the CQ using ib_alloc_cq().2980 *2981 * ensure that there are no other contexts that are posting WRs concurrently.2982 * Otherwise the drain is not guaranteed.2983 */2984void ib_drain_sq(struct ib_qp *qp)2985{2986 if (qp->device->ops.drain_sq)2987 qp->device->ops.drain_sq(qp);2988 else2989 __ib_drain_sq(qp);2990 trace_cq_drain_complete(qp->send_cq);2991}2992EXPORT_SYMBOL(ib_drain_sq);2993 2994/**2995 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the2996 * application.2997 * @qp: queue pair to drain2998 *2999 * If the device has a provider-specific drain function, then3000 * call that. Otherwise call the generic drain function3001 * __ib_drain_rq().3002 *3003 * The caller must:3004 *3005 * ensure there is room in the CQ and RQ for the drain work request and3006 * completion.3007 *3008 * allocate the CQ using ib_alloc_cq().3009 *3010 * ensure that there are no other contexts that are posting WRs concurrently.3011 * Otherwise the drain is not guaranteed.3012 */3013void ib_drain_rq(struct ib_qp *qp)3014{3015 if (qp->device->ops.drain_rq)3016 qp->device->ops.drain_rq(qp);3017 else3018 __ib_drain_rq(qp);3019 trace_cq_drain_complete(qp->recv_cq);3020}3021EXPORT_SYMBOL(ib_drain_rq);3022 3023/**3024 * ib_drain_qp() - Block until all CQEs have been consumed by the3025 * application on both the RQ and SQ.3026 * @qp: queue pair to drain3027 *3028 * The caller must:3029 *3030 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests3031 * and completions.3032 *3033 * allocate the CQs using ib_alloc_cq().3034 *3035 * ensure that there are no other contexts that are posting WRs concurrently.3036 * Otherwise the drain is not guaranteed.3037 */3038void ib_drain_qp(struct ib_qp *qp)3039{3040 ib_drain_sq(qp);3041 if (!qp->srq)3042 ib_drain_rq(qp);3043 else3044 __ib_drain_srq(qp);3045}3046EXPORT_SYMBOL(ib_drain_qp);3047 3048struct net_device *rdma_alloc_netdev(struct ib_device *device, u32 port_num,3049 enum rdma_netdev_t type, const char *name,3050 unsigned char name_assign_type,3051 void (*setup)(struct net_device *))3052{3053 struct rdma_netdev_alloc_params params;3054 struct net_device *netdev;3055 int rc;3056 3057 if (!device->ops.rdma_netdev_get_params)3058 return ERR_PTR(-EOPNOTSUPP);3059 3060 rc = device->ops.rdma_netdev_get_params(device, port_num, type,3061 ¶ms);3062 if (rc)3063 return ERR_PTR(rc);3064 3065 netdev = alloc_netdev_mqs(params.sizeof_priv, name, name_assign_type,3066 setup, params.txqs, params.rxqs);3067 if (!netdev)3068 return ERR_PTR(-ENOMEM);3069 3070 return netdev;3071}3072EXPORT_SYMBOL(rdma_alloc_netdev);3073 3074int rdma_init_netdev(struct ib_device *device, u32 port_num,3075 enum rdma_netdev_t type, const char *name,3076 unsigned char name_assign_type,3077 void (*setup)(struct net_device *),3078 struct net_device *netdev)3079{3080 struct rdma_netdev_alloc_params params;3081 int rc;3082 3083 if (!device->ops.rdma_netdev_get_params)3084 return -EOPNOTSUPP;3085 3086 rc = device->ops.rdma_netdev_get_params(device, port_num, type,3087 ¶ms);3088 if (rc)3089 return rc;3090 3091 return params.initialize_rdma_netdev(device, port_num,3092 netdev, params.param);3093}3094EXPORT_SYMBOL(rdma_init_netdev);3095 3096void __rdma_block_iter_start(struct ib_block_iter *biter,3097 struct scatterlist *sglist, unsigned int nents,3098 unsigned long pgsz)3099{3100 memset(biter, 0, sizeof(struct ib_block_iter));3101 biter->__sg = sglist;3102 biter->__sg_nents = nents;3103 3104 /* Driver provides best block size to use */3105 biter->__pg_bit = __fls(pgsz);3106}3107EXPORT_SYMBOL(__rdma_block_iter_start);3108 3109bool __rdma_block_iter_next(struct ib_block_iter *biter)3110{3111 unsigned int block_offset;3112 unsigned int sg_delta;3113 3114 if (!biter->__sg_nents || !biter->__sg)3115 return false;3116 3117 biter->__dma_addr = sg_dma_address(biter->__sg) + biter->__sg_advance;3118 block_offset = biter->__dma_addr & (BIT_ULL(biter->__pg_bit) - 1);3119 sg_delta = BIT_ULL(biter->__pg_bit) - block_offset;3120 3121 if (sg_dma_len(biter->__sg) - biter->__sg_advance > sg_delta) {3122 biter->__sg_advance += sg_delta;3123 } else {3124 biter->__sg_advance = 0;3125 biter->__sg = sg_next(biter->__sg);3126 biter->__sg_nents--;3127 }3128 3129 return true;3130}3131EXPORT_SYMBOL(__rdma_block_iter_next);3132 3133/**3134 * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct3135 * for the drivers.3136 * @descs: array of static descriptors3137 * @num_counters: number of elements in array3138 * @lifespan: milliseconds between updates3139 */3140struct rdma_hw_stats *rdma_alloc_hw_stats_struct(3141 const struct rdma_stat_desc *descs, int num_counters,3142 unsigned long lifespan)3143{3144 struct rdma_hw_stats *stats;3145 3146 stats = kzalloc(struct_size(stats, value, num_counters), GFP_KERNEL);3147 if (!stats)3148 return NULL;3149 3150 stats->is_disabled = kcalloc(BITS_TO_LONGS(num_counters),3151 sizeof(*stats->is_disabled), GFP_KERNEL);3152 if (!stats->is_disabled)3153 goto err;3154 3155 stats->descs = descs;3156 stats->num_counters = num_counters;3157 stats->lifespan = msecs_to_jiffies(lifespan);3158 mutex_init(&stats->lock);3159 3160 return stats;3161 3162err:3163 kfree(stats);3164 return NULL;3165}3166EXPORT_SYMBOL(rdma_alloc_hw_stats_struct);3167 3168/**3169 * rdma_free_hw_stats_struct - Helper function to release rdma_hw_stats3170 * @stats: statistics to release3171 */3172void rdma_free_hw_stats_struct(struct rdma_hw_stats *stats)3173{3174 if (!stats)3175 return;3176 3177 kfree(stats->is_disabled);3178 kfree(stats);3179}3180EXPORT_SYMBOL(rdma_free_hw_stats_struct);3181