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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / infiniband / core / verbs.c
blob93025d2009b89f8679a19001357b53bdc4733184
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 -ENOSYS;
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 -ENOSYS;
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(-ENOSYS);
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 -ENOSYS;
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) : -ENOSYS;
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 int 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 (cur_state < 0 || cur_state > IB_QPS_ERR ||
1273 next_state < 0 || next_state > IB_QPS_ERR)
1274 return 0;
1275
1276 if (mask & IB_QP_CUR_STATE &&
1277 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
1278 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
1279 return 0;
1280
1281 if (!qp_state_table[cur_state][next_state].valid)
1282 return 0;
1283
1284 req_param = qp_state_table[cur_state][next_state].req_param[type];
1285 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
1286
1287 if ((mask & req_param) != req_param)
1288 return 0;
1289
1290 if (mask & ~(req_param | opt_param | IB_QP_STATE))
1291 return 0;
1292
1293 return 1;
1294 }
1295 EXPORT_SYMBOL(ib_modify_qp_is_ok);
1296
1297 static int ib_resolve_eth_dmac(struct ib_device *device,
1298 struct rdma_ah_attr *ah_attr)
1299 {
1300 int ret = 0;
1301 struct ib_global_route *grh;
1302
1303 if (!rdma_is_port_valid(device, rdma_ah_get_port_num(ah_attr)))
1304 return -EINVAL;
1305
1306 grh = rdma_ah_retrieve_grh(ah_attr);
1307
1308 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1309 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1310 __be32 addr = 0;
1311
1312 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
1313 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);
1314 } else {
1315 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
1316 (char *)ah_attr->roce.dmac);
1317 }
1318 } else {
1319 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
1320 }
1321 return ret;
1322 }
1323
1324 /**
1325 * IB core internal function to perform QP attributes modification.
1326 */
1327 static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
1328 int attr_mask, struct ib_udata *udata)
1329 {
1330 u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1331 int ret;
1332
1333 if (rdma_ib_or_roce(qp->device, port)) {
1334 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {
1335 pr_warn("%s: %s rq_psn overflow, masking to 24 bits\n",
1336 __func__, qp->device->name);
1337 attr->rq_psn &= 0xffffff;
1338 }
1339
1340 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {
1341 pr_warn("%s: %s sq_psn overflow, masking to 24 bits\n",
1342 __func__, qp->device->name);
1343 attr->sq_psn &= 0xffffff;
1344 }
1345 }
1346
1347 ret = ib_security_modify_qp(qp, attr, attr_mask, udata);
1348 if (!ret && (attr_mask & IB_QP_PORT))
1349 qp->port = attr->port_num;
1350
1351 return ret;
1352 }
1353
1354 static bool is_qp_type_connected(const struct ib_qp *qp)
1355 {
1356 return (qp->qp_type == IB_QPT_UC ||
1357 qp->qp_type == IB_QPT_RC ||
1358 qp->qp_type == IB_QPT_XRC_INI ||
1359 qp->qp_type == IB_QPT_XRC_TGT);
1360 }
1361
1362 /**
1363 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
1364 * @ib_qp: The QP to modify.
1365 * @attr: On input, specifies the QP attributes to modify. On output,
1366 * the current values of selected QP attributes are returned.
1367 * @attr_mask: A bit-mask used to specify which attributes of the QP
1368 * are being modified.
1369 * @udata: pointer to user's input output buffer information
1370 * are being modified.
1371 * It returns 0 on success and returns appropriate error code on error.
1372 */
1373 int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,
1374 int attr_mask, struct ib_udata *udata)
1375 {
1376 struct ib_qp *qp = ib_qp->real_qp;
1377 int ret;
1378
1379 if (attr_mask & IB_QP_AV &&
1380 attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE &&
1381 is_qp_type_connected(qp)) {
1382 ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
1383 if (ret)
1384 return ret;
1385 }
1386 return _ib_modify_qp(qp, attr, attr_mask, udata);
1387 }
1388 EXPORT_SYMBOL(ib_modify_qp_with_udata);
1389
1390 int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width)
1391 {
1392 int rc;
1393 u32 netdev_speed;
1394 struct net_device *netdev;
1395 struct ethtool_link_ksettings lksettings;
1396
1397 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET)
1398 return -EINVAL;
1399
1400 if (!dev->get_netdev)
1401 return -EOPNOTSUPP;
1402
1403 netdev = dev->get_netdev(dev, port_num);
1404 if (!netdev)
1405 return -ENODEV;
1406
1407 rtnl_lock();
1408 rc = __ethtool_get_link_ksettings(netdev, &lksettings);
1409 rtnl_unlock();
1410
1411 dev_put(netdev);
1412
1413 if (!rc) {
1414 netdev_speed = lksettings.base.speed;
1415 } else {
1416 netdev_speed = SPEED_1000;
1417 pr_warn("%s speed is unknown, defaulting to %d\n", netdev->name,
1418 netdev_speed);
1419 }
1420
1421 if (netdev_speed <= SPEED_1000) {
1422 *width = IB_WIDTH_1X;
1423 *speed = IB_SPEED_SDR;
1424 } else if (netdev_speed <= SPEED_10000) {
1425 *width = IB_WIDTH_1X;
1426 *speed = IB_SPEED_FDR10;
1427 } else if (netdev_speed <= SPEED_20000) {
1428 *width = IB_WIDTH_4X;
1429 *speed = IB_SPEED_DDR;
1430 } else if (netdev_speed <= SPEED_25000) {
1431 *width = IB_WIDTH_1X;
1432 *speed = IB_SPEED_EDR;
1433 } else if (netdev_speed <= SPEED_40000) {
1434 *width = IB_WIDTH_4X;
1435 *speed = IB_SPEED_FDR10;
1436 } else {
1437 *width = IB_WIDTH_4X;
1438 *speed = IB_SPEED_EDR;
1439 }
1440
1441 return 0;
1442 }
1443 EXPORT_SYMBOL(ib_get_eth_speed);
1444
1445 int ib_modify_qp(struct ib_qp *qp,
1446 struct ib_qp_attr *qp_attr,
1447 int qp_attr_mask)
1448 {
1449 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1450 }
1451 EXPORT_SYMBOL(ib_modify_qp);
1452
1453 int ib_query_qp(struct ib_qp *qp,
1454 struct ib_qp_attr *qp_attr,
1455 int qp_attr_mask,
1456 struct ib_qp_init_attr *qp_init_attr)
1457 {
1458 return qp->device->query_qp ?
1459 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1460 -ENOSYS;
1461 }
1462 EXPORT_SYMBOL(ib_query_qp);
1463
1464 int ib_close_qp(struct ib_qp *qp)
1465 {
1466 struct ib_qp *real_qp;
1467 unsigned long flags;
1468
1469 real_qp = qp->real_qp;
1470 if (real_qp == qp)
1471 return -EINVAL;
1472
1473 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1474 list_del(&qp->open_list);
1475 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1476
1477 atomic_dec(&real_qp->usecnt);
1478 if (qp->qp_sec)
1479 ib_close_shared_qp_security(qp->qp_sec);
1480 kfree(qp);
1481
1482 return 0;
1483 }
1484 EXPORT_SYMBOL(ib_close_qp);
1485
1486 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1487 {
1488 struct ib_xrcd *xrcd;
1489 struct ib_qp *real_qp;
1490 int ret;
1491
1492 real_qp = qp->real_qp;
1493 xrcd = real_qp->xrcd;
1494
1495 mutex_lock(&xrcd->tgt_qp_mutex);
1496 ib_close_qp(qp);
1497 if (atomic_read(&real_qp->usecnt) == 0)
1498 list_del(&real_qp->xrcd_list);
1499 else
1500 real_qp = NULL;
1501 mutex_unlock(&xrcd->tgt_qp_mutex);
1502
1503 if (real_qp) {
1504 ret = ib_destroy_qp(real_qp);
1505 if (!ret)
1506 atomic_dec(&xrcd->usecnt);
1507 else
1508 __ib_insert_xrcd_qp(xrcd, real_qp);
1509 }
1510
1511 return 0;
1512 }
1513
1514 int ib_destroy_qp(struct ib_qp *qp)
1515 {
1516 struct ib_pd *pd;
1517 struct ib_cq *scq, *rcq;
1518 struct ib_srq *srq;
1519 struct ib_rwq_ind_table *ind_tbl;
1520 struct ib_qp_security *sec;
1521 int ret;
1522
1523 WARN_ON_ONCE(qp->mrs_used > 0);
1524
1525 if (atomic_read(&qp->usecnt))
1526 return -EBUSY;
1527
1528 if (qp->real_qp != qp)
1529 return __ib_destroy_shared_qp(qp);
1530
1531 pd = qp->pd;
1532 scq = qp->send_cq;
1533 rcq = qp->recv_cq;
1534 srq = qp->srq;
1535 ind_tbl = qp->rwq_ind_tbl;
1536 sec = qp->qp_sec;
1537 if (sec)
1538 ib_destroy_qp_security_begin(sec);
1539
1540 if (!qp->uobject)
1541 rdma_rw_cleanup_mrs(qp);
1542
1543 rdma_restrack_del(&qp->res);
1544 ret = qp->device->destroy_qp(qp);
1545 if (!ret) {
1546 if (pd)
1547 atomic_dec(&pd->usecnt);
1548 if (scq)
1549 atomic_dec(&scq->usecnt);
1550 if (rcq)
1551 atomic_dec(&rcq->usecnt);
1552 if (srq)
1553 atomic_dec(&srq->usecnt);
1554 if (ind_tbl)
1555 atomic_dec(&ind_tbl->usecnt);
1556 if (sec)
1557 ib_destroy_qp_security_end(sec);
1558 } else {
1559 if (sec)
1560 ib_destroy_qp_security_abort(sec);
1561 }
1562
1563 return ret;
1564 }
1565 EXPORT_SYMBOL(ib_destroy_qp);
1566
1567 /* Completion queues */
1568
1569 struct ib_cq *ib_create_cq(struct ib_device *device,
1570 ib_comp_handler comp_handler,
1571 void (*event_handler)(struct ib_event *, void *),
1572 void *cq_context,
1573 const struct ib_cq_init_attr *cq_attr)
1574 {
1575 struct ib_cq *cq;
1576
1577 cq = device->create_cq(device, cq_attr, NULL, NULL);
1578
1579 if (!IS_ERR(cq)) {
1580 cq->device = device;
1581 cq->uobject = NULL;
1582 cq->comp_handler = comp_handler;
1583 cq->event_handler = event_handler;
1584 cq->cq_context = cq_context;
1585 atomic_set(&cq->usecnt, 0);
1586 cq->res.type = RDMA_RESTRACK_CQ;
1587 rdma_restrack_add(&cq->res);
1588 }
1589
1590 return cq;
1591 }
1592 EXPORT_SYMBOL(ib_create_cq);
1593
1594 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1595 {
1596 return cq->device->modify_cq ?
1597 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1598 }
1599 EXPORT_SYMBOL(rdma_set_cq_moderation);
1600
1601 int ib_destroy_cq(struct ib_cq *cq)
1602 {
1603 if (atomic_read(&cq->usecnt))
1604 return -EBUSY;
1605
1606 rdma_restrack_del(&cq->res);
1607 return cq->device->destroy_cq(cq);
1608 }
1609 EXPORT_SYMBOL(ib_destroy_cq);
1610
1611 int ib_resize_cq(struct ib_cq *cq, int cqe)
1612 {
1613 return cq->device->resize_cq ?
1614 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1615 }
1616 EXPORT_SYMBOL(ib_resize_cq);
1617
1618 /* Memory regions */
1619
1620 int ib_dereg_mr(struct ib_mr *mr)
1621 {
1622 struct ib_pd *pd = mr->pd;
1623 int ret;
1624
1625 ret = mr->device->dereg_mr(mr);
1626 if (!ret)
1627 atomic_dec(&pd->usecnt);
1628
1629 return ret;
1630 }
1631 EXPORT_SYMBOL(ib_dereg_mr);
1632
1633 /**
1634 * ib_alloc_mr() - Allocates a memory region
1635 * @pd: protection domain associated with the region
1636 * @mr_type: memory region type
1637 * @max_num_sg: maximum sg entries available for registration.
1638 *
1639 * Notes:
1640 * Memory registeration page/sg lists must not exceed max_num_sg.
1641 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1642 * max_num_sg * used_page_size.
1643 *
1644 */
1645 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1646 enum ib_mr_type mr_type,
1647 u32 max_num_sg)
1648 {
1649 struct ib_mr *mr;
1650
1651 if (!pd->device->alloc_mr)
1652 return ERR_PTR(-ENOSYS);
1653
1654 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1655 if (!IS_ERR(mr)) {
1656 mr->device = pd->device;
1657 mr->pd = pd;
1658 mr->uobject = NULL;
1659 atomic_inc(&pd->usecnt);
1660 mr->need_inval = false;
1661 }
1662
1663 return mr;
1664 }
1665 EXPORT_SYMBOL(ib_alloc_mr);
1666
1667 /* "Fast" memory regions */
1668
1669 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1670 int mr_access_flags,
1671 struct ib_fmr_attr *fmr_attr)
1672 {
1673 struct ib_fmr *fmr;
1674
1675 if (!pd->device->alloc_fmr)
1676 return ERR_PTR(-ENOSYS);
1677
1678 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1679 if (!IS_ERR(fmr)) {
1680 fmr->device = pd->device;
1681 fmr->pd = pd;
1682 atomic_inc(&pd->usecnt);
1683 }
1684
1685 return fmr;
1686 }
1687 EXPORT_SYMBOL(ib_alloc_fmr);
1688
1689 int ib_unmap_fmr(struct list_head *fmr_list)
1690 {
1691 struct ib_fmr *fmr;
1692
1693 if (list_empty(fmr_list))
1694 return 0;
1695
1696 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1697 return fmr->device->unmap_fmr(fmr_list);
1698 }
1699 EXPORT_SYMBOL(ib_unmap_fmr);
1700
1701 int ib_dealloc_fmr(struct ib_fmr *fmr)
1702 {
1703 struct ib_pd *pd;
1704 int ret;
1705
1706 pd = fmr->pd;
1707 ret = fmr->device->dealloc_fmr(fmr);
1708 if (!ret)
1709 atomic_dec(&pd->usecnt);
1710
1711 return ret;
1712 }
1713 EXPORT_SYMBOL(ib_dealloc_fmr);
1714
1715 /* Multicast groups */
1716
1717 static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
1718 {
1719 struct ib_qp_init_attr init_attr = {};
1720 struct ib_qp_attr attr = {};
1721 int num_eth_ports = 0;
1722 int port;
1723
1724 /* If QP state >= init, it is assigned to a port and we can check this
1725 * port only.
1726 */
1727 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
1728 if (attr.qp_state >= IB_QPS_INIT) {
1729 if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
1730 IB_LINK_LAYER_INFINIBAND)
1731 return true;
1732 goto lid_check;
1733 }
1734 }
1735
1736 /* Can't get a quick answer, iterate over all ports */
1737 for (port = 0; port < qp->device->phys_port_cnt; port++)
1738 if (rdma_port_get_link_layer(qp->device, port) !=
1739 IB_LINK_LAYER_INFINIBAND)
1740 num_eth_ports++;
1741
1742 /* If we have at lease one Ethernet port, RoCE annex declares that
1743 * multicast LID should be ignored. We can't tell at this step if the
1744 * QP belongs to an IB or Ethernet port.
1745 */
1746 if (num_eth_ports)
1747 return true;
1748
1749 /* If all the ports are IB, we can check according to IB spec. */
1750 lid_check:
1751 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
1752 lid == be16_to_cpu(IB_LID_PERMISSIVE));
1753 }
1754
1755 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1756 {
1757 int ret;
1758
1759 if (!qp->device->attach_mcast)
1760 return -ENOSYS;
1761
1762 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
1763 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
1764 return -EINVAL;
1765
1766 ret = qp->device->attach_mcast(qp, gid, lid);
1767 if (!ret)
1768 atomic_inc(&qp->usecnt);
1769 return ret;
1770 }
1771 EXPORT_SYMBOL(ib_attach_mcast);
1772
1773 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1774 {
1775 int ret;
1776
1777 if (!qp->device->detach_mcast)
1778 return -ENOSYS;
1779
1780 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
1781 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
1782 return -EINVAL;
1783
1784 ret = qp->device->detach_mcast(qp, gid, lid);
1785 if (!ret)
1786 atomic_dec(&qp->usecnt);
1787 return ret;
1788 }
1789 EXPORT_SYMBOL(ib_detach_mcast);
1790
1791 struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller)
1792 {
1793 struct ib_xrcd *xrcd;
1794
1795 if (!device->alloc_xrcd)
1796 return ERR_PTR(-ENOSYS);
1797
1798 xrcd = device->alloc_xrcd(device, NULL, NULL);
1799 if (!IS_ERR(xrcd)) {
1800 xrcd->device = device;
1801 xrcd->inode = NULL;
1802 atomic_set(&xrcd->usecnt, 0);
1803 mutex_init(&xrcd->tgt_qp_mutex);
1804 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1805 }
1806
1807 return xrcd;
1808 }
1809 EXPORT_SYMBOL(__ib_alloc_xrcd);
1810
1811 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1812 {
1813 struct ib_qp *qp;
1814 int ret;
1815
1816 if (atomic_read(&xrcd->usecnt))
1817 return -EBUSY;
1818
1819 while (!list_empty(&xrcd->tgt_qp_list)) {
1820 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1821 ret = ib_destroy_qp(qp);
1822 if (ret)
1823 return ret;
1824 }
1825
1826 return xrcd->device->dealloc_xrcd(xrcd);
1827 }
1828 EXPORT_SYMBOL(ib_dealloc_xrcd);
1829
1830 /**
1831 * ib_create_wq - Creates a WQ associated with the specified protection
1832 * domain.
1833 * @pd: The protection domain associated with the WQ.
1834 * @wq_attr: A list of initial attributes required to create the
1835 * WQ. If WQ creation succeeds, then the attributes are updated to
1836 * the actual capabilities of the created WQ.
1837 *
1838 * wq_attr->max_wr and wq_attr->max_sge determine
1839 * the requested size of the WQ, and set to the actual values allocated
1840 * on return.
1841 * If ib_create_wq() succeeds, then max_wr and max_sge will always be
1842 * at least as large as the requested values.
1843 */
1844 struct ib_wq *ib_create_wq(struct ib_pd *pd,
1845 struct ib_wq_init_attr *wq_attr)
1846 {
1847 struct ib_wq *wq;
1848
1849 if (!pd->device->create_wq)
1850 return ERR_PTR(-ENOSYS);
1851
1852 wq = pd->device->create_wq(pd, wq_attr, NULL);
1853 if (!IS_ERR(wq)) {
1854 wq->event_handler = wq_attr->event_handler;
1855 wq->wq_context = wq_attr->wq_context;
1856 wq->wq_type = wq_attr->wq_type;
1857 wq->cq = wq_attr->cq;
1858 wq->device = pd->device;
1859 wq->pd = pd;
1860 wq->uobject = NULL;
1861 atomic_inc(&pd->usecnt);
1862 atomic_inc(&wq_attr->cq->usecnt);
1863 atomic_set(&wq->usecnt, 0);
1864 }
1865 return wq;
1866 }
1867 EXPORT_SYMBOL(ib_create_wq);
1868
1869 /**
1870 * ib_destroy_wq - Destroys the specified WQ.
1871 * @wq: The WQ to destroy.
1872 */
1873 int ib_destroy_wq(struct ib_wq *wq)
1874 {
1875 int err;
1876 struct ib_cq *cq = wq->cq;
1877 struct ib_pd *pd = wq->pd;
1878
1879 if (atomic_read(&wq->usecnt))
1880 return -EBUSY;
1881
1882 err = wq->device->destroy_wq(wq);
1883 if (!err) {
1884 atomic_dec(&pd->usecnt);
1885 atomic_dec(&cq->usecnt);
1886 }
1887 return err;
1888 }
1889 EXPORT_SYMBOL(ib_destroy_wq);
1890
1891 /**
1892 * ib_modify_wq - Modifies the specified WQ.
1893 * @wq: The WQ to modify.
1894 * @wq_attr: On input, specifies the WQ attributes to modify.
1895 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
1896 * are being modified.
1897 * On output, the current values of selected WQ attributes are returned.
1898 */
1899 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
1900 u32 wq_attr_mask)
1901 {
1902 int err;
1903
1904 if (!wq->device->modify_wq)
1905 return -ENOSYS;
1906
1907 err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL);
1908 return err;
1909 }
1910 EXPORT_SYMBOL(ib_modify_wq);
1911
1912 /*
1913 * ib_create_rwq_ind_table - Creates a RQ Indirection Table.
1914 * @device: The device on which to create the rwq indirection table.
1915 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to
1916 * create the Indirection Table.
1917 *
1918 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
1919 * than the created ib_rwq_ind_table object and the caller is responsible
1920 * for its memory allocation/free.
1921 */
1922 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
1923 struct ib_rwq_ind_table_init_attr *init_attr)
1924 {
1925 struct ib_rwq_ind_table *rwq_ind_table;
1926 int i;
1927 u32 table_size;
1928
1929 if (!device->create_rwq_ind_table)
1930 return ERR_PTR(-ENOSYS);
1931
1932 table_size = (1 << init_attr->log_ind_tbl_size);
1933 rwq_ind_table = device->create_rwq_ind_table(device,
1934 init_attr, NULL);
1935 if (IS_ERR(rwq_ind_table))
1936 return rwq_ind_table;
1937
1938 rwq_ind_table->ind_tbl = init_attr->ind_tbl;
1939 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size;
1940 rwq_ind_table->device = device;
1941 rwq_ind_table->uobject = NULL;
1942 atomic_set(&rwq_ind_table->usecnt, 0);
1943
1944 for (i = 0; i < table_size; i++)
1945 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt);
1946
1947 return rwq_ind_table;
1948 }
1949 EXPORT_SYMBOL(ib_create_rwq_ind_table);
1950
1951 /*
1952 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
1953 * @wq_ind_table: The Indirection Table to destroy.
1954 */
1955 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table)
1956 {
1957 int err, i;
1958 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size);
1959 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl;
1960
1961 if (atomic_read(&rwq_ind_table->usecnt))
1962 return -EBUSY;
1963
1964 err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table);
1965 if (!err) {
1966 for (i = 0; i < table_size; i++)
1967 atomic_dec(&ind_tbl[i]->usecnt);
1968 }
1969
1970 return err;
1971 }
1972 EXPORT_SYMBOL(ib_destroy_rwq_ind_table);
1973
1974 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1975 struct ib_flow_attr *flow_attr,
1976 int domain)
1977 {
1978 struct ib_flow *flow_id;
1979 if (!qp->device->create_flow)
1980 return ERR_PTR(-ENOSYS);
1981
1982 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1983 if (!IS_ERR(flow_id)) {
1984 atomic_inc(&qp->usecnt);
1985 flow_id->qp = qp;
1986 }
1987 return flow_id;
1988 }
1989 EXPORT_SYMBOL(ib_create_flow);
1990
1991 int ib_destroy_flow(struct ib_flow *flow_id)
1992 {
1993 int err;
1994 struct ib_qp *qp = flow_id->qp;
1995
1996 err = qp->device->destroy_flow(flow_id);
1997 if (!err)
1998 atomic_dec(&qp->usecnt);
1999 return err;
2000 }
2001 EXPORT_SYMBOL(ib_destroy_flow);
2002
2003 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
2004 struct ib_mr_status *mr_status)
2005 {
2006 return mr->device->check_mr_status ?
2007 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
2008 }
2009 EXPORT_SYMBOL(ib_check_mr_status);
2010
2011 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
2012 int state)
2013 {
2014 if (!device->set_vf_link_state)
2015 return -ENOSYS;
2016
2017 return device->set_vf_link_state(device, vf, port, state);
2018 }
2019 EXPORT_SYMBOL(ib_set_vf_link_state);
2020
2021 int ib_get_vf_config(struct ib_device *device, int vf, u8 port,
2022 struct ifla_vf_info *info)
2023 {
2024 if (!device->get_vf_config)
2025 return -ENOSYS;
2026
2027 return device->get_vf_config(device, vf, port, info);
2028 }
2029 EXPORT_SYMBOL(ib_get_vf_config);
2030
2031 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port,
2032 struct ifla_vf_stats *stats)
2033 {
2034 if (!device->get_vf_stats)
2035 return -ENOSYS;
2036
2037 return device->get_vf_stats(device, vf, port, stats);
2038 }
2039 EXPORT_SYMBOL(ib_get_vf_stats);
2040
2041 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
2042 int type)
2043 {
2044 if (!device->set_vf_guid)
2045 return -ENOSYS;
2046
2047 return device->set_vf_guid(device, vf, port, guid, type);
2048 }
2049 EXPORT_SYMBOL(ib_set_vf_guid);
2050
2051 /**
2052 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
2053 * and set it the memory region.
2054 * @mr: memory region
2055 * @sg: dma mapped scatterlist
2056 * @sg_nents: number of entries in sg
2057 * @sg_offset: offset in bytes into sg
2058 * @page_size: page vector desired page size
2059 *
2060 * Constraints:
2061 * - The first sg element is allowed to have an offset.
2062 * - Each sg element must either be aligned to page_size or virtually
2063 * contiguous to the previous element. In case an sg element has a
2064 * non-contiguous offset, the mapping prefix will not include it.
2065 * - The last sg element is allowed to have length less than page_size.
2066 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
2067 * then only max_num_sg entries will be mapped.
2068 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
2069 * constraints holds and the page_size argument is ignored.
2070 *
2071 * Returns the number of sg elements that were mapped to the memory region.
2072 *
2073 * After this completes successfully, the memory region
2074 * is ready for registration.
2075 */
2076 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
2077 unsigned int *sg_offset, unsigned int page_size)
2078 {
2079 if (unlikely(!mr->device->map_mr_sg))
2080 return -ENOSYS;
2081
2082 mr->page_size = page_size;
2083
2084 return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset);
2085 }
2086 EXPORT_SYMBOL(ib_map_mr_sg);
2087
2088 /**
2089 * ib_sg_to_pages() - Convert the largest prefix of a sg list
2090 * to a page vector
2091 * @mr: memory region
2092 * @sgl: dma mapped scatterlist
2093 * @sg_nents: number of entries in sg
2094 * @sg_offset_p: IN: start offset in bytes into sg
2095 * OUT: offset in bytes for element n of the sg of the first
2096 * byte that has not been processed where n is the return
2097 * value of this function.
2098 * @set_page: driver page assignment function pointer
2099 *
2100 * Core service helper for drivers to convert the largest
2101 * prefix of given sg list to a page vector. The sg list
2102 * prefix converted is the prefix that meet the requirements
2103 * of ib_map_mr_sg.
2104 *
2105 * Returns the number of sg elements that were assigned to
2106 * a page vector.
2107 */
2108 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
2109 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
2110 {
2111 struct scatterlist *sg;
2112 u64 last_end_dma_addr = 0;
2113 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
2114 unsigned int last_page_off = 0;
2115 u64 page_mask = ~((u64)mr->page_size - 1);
2116 int i, ret;
2117
2118 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
2119 return -EINVAL;
2120
2121 mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
2122 mr->length = 0;
2123
2124 for_each_sg(sgl, sg, sg_nents, i) {
2125 u64 dma_addr = sg_dma_address(sg) + sg_offset;
2126 u64 prev_addr = dma_addr;
2127 unsigned int dma_len = sg_dma_len(sg) - sg_offset;
2128 u64 end_dma_addr = dma_addr + dma_len;
2129 u64 page_addr = dma_addr & page_mask;
2130
2131 /*
2132 * For the second and later elements, check whether either the
2133 * end of element i-1 or the start of element i is not aligned
2134 * on a page boundary.
2135 */
2136 if (i && (last_page_off != 0 || page_addr != dma_addr)) {
2137 /* Stop mapping if there is a gap. */
2138 if (last_end_dma_addr != dma_addr)
2139 break;
2140
2141 /*
2142 * Coalesce this element with the last. If it is small
2143 * enough just update mr->length. Otherwise start
2144 * mapping from the next page.
2145 */
2146 goto next_page;
2147 }
2148
2149 do {
2150 ret = set_page(mr, page_addr);
2151 if (unlikely(ret < 0)) {
2152 sg_offset = prev_addr - sg_dma_address(sg);
2153 mr->length += prev_addr - dma_addr;
2154 if (sg_offset_p)
2155 *sg_offset_p = sg_offset;
2156 return i || sg_offset ? i : ret;
2157 }
2158 prev_addr = page_addr;
2159 next_page:
2160 page_addr += mr->page_size;
2161 } while (page_addr < end_dma_addr);
2162
2163 mr->length += dma_len;
2164 last_end_dma_addr = end_dma_addr;
2165 last_page_off = end_dma_addr & ~page_mask;
2166
2167 sg_offset = 0;
2168 }
2169
2170 if (sg_offset_p)
2171 *sg_offset_p = 0;
2172 return i;
2173 }
2174 EXPORT_SYMBOL(ib_sg_to_pages);
2175
2176 struct ib_drain_cqe {
2177 struct ib_cqe cqe;
2178 struct completion done;
2179 };
2180
2181 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
2182 {
2183 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
2184 cqe);
2185
2186 complete(&cqe->done);
2187 }
2188
2189 /*
2190 * Post a WR and block until its completion is reaped for the SQ.
2191 */
2192 static void __ib_drain_sq(struct ib_qp *qp)
2193 {
2194 struct ib_cq *cq = qp->send_cq;
2195 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2196 struct ib_drain_cqe sdrain;
2197 struct ib_send_wr swr = {}, *bad_swr;
2198 int ret;
2199
2200 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2201 if (ret) {
2202 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2203 return;
2204 }
2205
2206 swr.wr_cqe = &sdrain.cqe;
2207 sdrain.cqe.done = ib_drain_qp_done;
2208 init_completion(&sdrain.done);
2209
2210 ret = ib_post_send(qp, &swr, &bad_swr);
2211 if (ret) {
2212 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2213 return;
2214 }
2215
2216 if (cq->poll_ctx == IB_POLL_DIRECT)
2217 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)
2218 ib_process_cq_direct(cq, -1);
2219 else
2220 wait_for_completion(&sdrain.done);
2221 }
2222
2223 /*
2224 * Post a WR and block until its completion is reaped for the RQ.
2225 */
2226 static void __ib_drain_rq(struct ib_qp *qp)
2227 {
2228 struct ib_cq *cq = qp->recv_cq;
2229 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2230 struct ib_drain_cqe rdrain;
2231 struct ib_recv_wr rwr = {}, *bad_rwr;
2232 int ret;
2233
2234 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2235 if (ret) {
2236 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2237 return;
2238 }
2239
2240 rwr.wr_cqe = &rdrain.cqe;
2241 rdrain.cqe.done = ib_drain_qp_done;
2242 init_completion(&rdrain.done);
2243
2244 ret = ib_post_recv(qp, &rwr, &bad_rwr);
2245 if (ret) {
2246 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2247 return;
2248 }
2249
2250 if (cq->poll_ctx == IB_POLL_DIRECT)
2251 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)
2252 ib_process_cq_direct(cq, -1);
2253 else
2254 wait_for_completion(&rdrain.done);
2255 }
2256
2257 /**
2258 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
2259 * application.
2260 * @qp: queue pair to drain
2261 *
2262 * If the device has a provider-specific drain function, then
2263 * call that. Otherwise call the generic drain function
2264 * __ib_drain_sq().
2265 *
2266 * The caller must:
2267 *
2268 * ensure there is room in the CQ and SQ for the drain work request and
2269 * completion.
2270 *
2271 * allocate the CQ using ib_alloc_cq().
2272 *
2273 * ensure that there are no other contexts that are posting WRs concurrently.
2274 * Otherwise the drain is not guaranteed.
2275 */
2276 void ib_drain_sq(struct ib_qp *qp)
2277 {
2278 if (qp->device->drain_sq)
2279 qp->device->drain_sq(qp);
2280 else
2281 __ib_drain_sq(qp);
2282 }
2283 EXPORT_SYMBOL(ib_drain_sq);
2284
2285 /**
2286 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
2287 * application.
2288 * @qp: queue pair to drain
2289 *
2290 * If the device has a provider-specific drain function, then
2291 * call that. Otherwise call the generic drain function
2292 * __ib_drain_rq().
2293 *
2294 * The caller must:
2295 *
2296 * ensure there is room in the CQ and RQ for the drain work request and
2297 * completion.
2298 *
2299 * allocate the CQ using ib_alloc_cq().
2300 *
2301 * ensure that there are no other contexts that are posting WRs concurrently.
2302 * Otherwise the drain is not guaranteed.
2303 */
2304 void ib_drain_rq(struct ib_qp *qp)
2305 {
2306 if (qp->device->drain_rq)
2307 qp->device->drain_rq(qp);
2308 else
2309 __ib_drain_rq(qp);
2310 }
2311 EXPORT_SYMBOL(ib_drain_rq);
2312
2313 /**
2314 * ib_drain_qp() - Block until all CQEs have been consumed by the
2315 * application on both the RQ and SQ.
2316 * @qp: queue pair to drain
2317 *
2318 * The caller must:
2319 *
2320 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
2321 * and completions.
2322 *
2323 * allocate the CQs using ib_alloc_cq().
2324 *
2325 * ensure that there are no other contexts that are posting WRs concurrently.
2326 * Otherwise the drain is not guaranteed.
2327 */
2328 void ib_drain_qp(struct ib_qp *qp)
2329 {
2330 ib_drain_sq(qp);
2331 if (!qp->srq)
2332 ib_drain_rq(qp);
2333 }
2334 EXPORT_SYMBOL(ib_drain_qp);
CRIS linux kernel tree