?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / infiniband / core / verbs.c
blob3ebae3b65c28210919fe3f4135d81b1d78faaccb
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 #include <trace/events/rdma_core.h>
56
57 #include <trace/events/rdma_core.h>
58
59 static int ib_resolve_eth_dmac(struct ib_device *device,
60 struct rdma_ah_attr *ah_attr);
61
62 static const char * const ib_events[] = {
63 [IB_EVENT_CQ_ERR] = "CQ error",
64 [IB_EVENT_QP_FATAL] = "QP fatal error",
65 [IB_EVENT_QP_REQ_ERR] = "QP request error",
66 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
67 [IB_EVENT_COMM_EST] = "communication established",
68 [IB_EVENT_SQ_DRAINED] = "send queue drained",
69 [IB_EVENT_PATH_MIG] = "path migration successful",
70 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
71 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
72 [IB_EVENT_PORT_ACTIVE] = "port active",
73 [IB_EVENT_PORT_ERR] = "port error",
74 [IB_EVENT_LID_CHANGE] = "LID change",
75 [IB_EVENT_PKEY_CHANGE] = "P_key change",
76 [IB_EVENT_SM_CHANGE] = "SM change",
77 [IB_EVENT_SRQ_ERR] = "SRQ error",
78 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
79 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
80 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
81 [IB_EVENT_GID_CHANGE] = "GID changed",
82 };
83
84 const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
85 {
86 size_t index = event;
87
88 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
89 ib_events[index] : "unrecognized event";
90 }
91 EXPORT_SYMBOL(ib_event_msg);
92
93 static const char * const wc_statuses[] = {
94 [IB_WC_SUCCESS] = "success",
95 [IB_WC_LOC_LEN_ERR] = "local length error",
96 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
97 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
98 [IB_WC_LOC_PROT_ERR] = "local protection error",
99 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
100 [IB_WC_MW_BIND_ERR] = "memory management operation error",
101 [IB_WC_BAD_RESP_ERR] = "bad response error",
102 [IB_WC_LOC_ACCESS_ERR] = "local access error",
103 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
104 [IB_WC_REM_ACCESS_ERR] = "remote access error",
105 [IB_WC_REM_OP_ERR] = "remote operation error",
106 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
107 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
108 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
109 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
110 [IB_WC_REM_ABORT_ERR] = "operation aborted",
111 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
112 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
113 [IB_WC_FATAL_ERR] = "fatal error",
114 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
115 [IB_WC_GENERAL_ERR] = "general error",
116 };
117
118 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
119 {
120 size_t index = status;
121
122 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
123 wc_statuses[index] : "unrecognized status";
124 }
125 EXPORT_SYMBOL(ib_wc_status_msg);
126
127 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
128 {
129 switch (rate) {
130 case IB_RATE_2_5_GBPS: return 1;
131 case IB_RATE_5_GBPS: return 2;
132 case IB_RATE_10_GBPS: return 4;
133 case IB_RATE_20_GBPS: return 8;
134 case IB_RATE_30_GBPS: return 12;
135 case IB_RATE_40_GBPS: return 16;
136 case IB_RATE_60_GBPS: return 24;
137 case IB_RATE_80_GBPS: return 32;
138 case IB_RATE_120_GBPS: return 48;
139 case IB_RATE_14_GBPS: return 6;
140 case IB_RATE_56_GBPS: return 22;
141 case IB_RATE_112_GBPS: return 45;
142 case IB_RATE_168_GBPS: return 67;
143 case IB_RATE_25_GBPS: return 10;
144 case IB_RATE_100_GBPS: return 40;
145 case IB_RATE_200_GBPS: return 80;
146 case IB_RATE_300_GBPS: return 120;
147 case IB_RATE_28_GBPS: return 11;
148 case IB_RATE_50_GBPS: return 20;
149 case IB_RATE_400_GBPS: return 160;
150 case IB_RATE_600_GBPS: return 240;
151 default: return -1;
152 }
153 }
154 EXPORT_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 default: return IB_RATE_PORT_CURRENT;
181 }
182 }
183 EXPORT_SYMBOL(mult_to_ib_rate);
184
185 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
186 {
187 switch (rate) {
188 case IB_RATE_2_5_GBPS: return 2500;
189 case IB_RATE_5_GBPS: return 5000;
190 case IB_RATE_10_GBPS: return 10000;
191 case IB_RATE_20_GBPS: return 20000;
192 case IB_RATE_30_GBPS: return 30000;
193 case IB_RATE_40_GBPS: return 40000;
194 case IB_RATE_60_GBPS: return 60000;
195 case IB_RATE_80_GBPS: return 80000;
196 case IB_RATE_120_GBPS: return 120000;
197 case IB_RATE_14_GBPS: return 14062;
198 case IB_RATE_56_GBPS: return 56250;
199 case IB_RATE_112_GBPS: return 112500;
200 case IB_RATE_168_GBPS: return 168750;
201 case IB_RATE_25_GBPS: return 25781;
202 case IB_RATE_100_GBPS: return 103125;
203 case IB_RATE_200_GBPS: return 206250;
204 case IB_RATE_300_GBPS: return 309375;
205 case IB_RATE_28_GBPS: return 28125;
206 case IB_RATE_50_GBPS: return 53125;
207 case IB_RATE_400_GBPS: return 425000;
208 case IB_RATE_600_GBPS: return 637500;
209 default: return -1;
210 }
211 }
212 EXPORT_SYMBOL(ib_rate_to_mbps);
213
214 __attribute_const__ enum rdma_transport_type
215 rdma_node_get_transport(unsigned int node_type)
216 {
217
218 if (node_type == RDMA_NODE_USNIC)
219 return RDMA_TRANSPORT_USNIC;
220 if (node_type == RDMA_NODE_USNIC_UDP)
221 return RDMA_TRANSPORT_USNIC_UDP;
222 if (node_type == RDMA_NODE_RNIC)
223 return RDMA_TRANSPORT_IWARP;
224 if (node_type == RDMA_NODE_UNSPECIFIED)
225 return RDMA_TRANSPORT_UNSPECIFIED;
226
227 return RDMA_TRANSPORT_IB;
228 }
229 EXPORT_SYMBOL(rdma_node_get_transport);
230
231 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
232 {
233 enum rdma_transport_type lt;
234 if (device->ops.get_link_layer)
235 return device->ops.get_link_layer(device, port_num);
236
237 lt = rdma_node_get_transport(device->node_type);
238 if (lt == RDMA_TRANSPORT_IB)
239 return IB_LINK_LAYER_INFINIBAND;
240
241 return IB_LINK_LAYER_ETHERNET;
242 }
243 EXPORT_SYMBOL(rdma_port_get_link_layer);
244
245 /* Protection domains */
246
247 /**
248 * ib_alloc_pd - Allocates an unused protection domain.
249 * @device: The device on which to allocate the protection domain.
250 * @flags: protection domain flags
251 * @caller: caller's build-time module name
252 *
253 * A protection domain object provides an association between QPs, shared
254 * receive queues, address handles, memory regions, and memory windows.
255 *
256 * Every PD has a local_dma_lkey which can be used as the lkey value for local
257 * memory operations.
258 */
259 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
260 const char *caller)
261 {
262 struct ib_pd *pd;
263 int mr_access_flags = 0;
264 int ret;
265
266 pd = rdma_zalloc_drv_obj(device, ib_pd);
267 if (!pd)
268 return ERR_PTR(-ENOMEM);
269
270 pd->device = device;
271 pd->uobject = NULL;
272 pd->__internal_mr = NULL;
273 atomic_set(&pd->usecnt, 0);
274 pd->flags = flags;
275
276 pd->res.type = RDMA_RESTRACK_PD;
277 rdma_restrack_set_task(&pd->res, caller);
278
279 ret = device->ops.alloc_pd(pd, NULL);
280 if (ret) {
281 kfree(pd);
282 return ERR_PTR(ret);
283 }
284 rdma_restrack_kadd(&pd->res);
285
286 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
287 pd->local_dma_lkey = device->local_dma_lkey;
288 else
289 mr_access_flags |= IB_ACCESS_LOCAL_WRITE;
290
291 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
292 pr_warn("%s: enabling unsafe global rkey\n", caller);
293 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
294 }
295
296 if (mr_access_flags) {
297 struct ib_mr *mr;
298
299 mr = pd->device->ops.get_dma_mr(pd, mr_access_flags);
300 if (IS_ERR(mr)) {
301 ib_dealloc_pd(pd);
302 return ERR_CAST(mr);
303 }
304
305 mr->device = pd->device;
306 mr->pd = pd;
307 mr->type = IB_MR_TYPE_DMA;
308 mr->uobject = NULL;
309 mr->need_inval = false;
310
311 pd->__internal_mr = mr;
312
313 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY))
314 pd->local_dma_lkey = pd->__internal_mr->lkey;
315
316 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
317 pd->unsafe_global_rkey = pd->__internal_mr->rkey;
318 }
319
320 return pd;
321 }
322 EXPORT_SYMBOL(__ib_alloc_pd);
323
324 /**
325 * ib_dealloc_pd_user - Deallocates a protection domain.
326 * @pd: The protection domain to deallocate.
327 * @udata: Valid user data or NULL for kernel object
328 *
329 * It is an error to call this function while any resources in the pd still
330 * exist. The caller is responsible to synchronously destroy them and
331 * guarantee no new allocations will happen.
332 */
333 void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata)
334 {
335 int ret;
336
337 if (pd->__internal_mr) {
338 ret = pd->device->ops.dereg_mr(pd->__internal_mr, NULL);
339 WARN_ON(ret);
340 pd->__internal_mr = NULL;
341 }
342
343 /* uverbs manipulates usecnt with proper locking, while the kabi
344 requires the caller to guarantee we can't race here. */
345 WARN_ON(atomic_read(&pd->usecnt));
346
347 rdma_restrack_del(&pd->res);
348 pd->device->ops.dealloc_pd(pd, udata);
349 kfree(pd);
350 }
351 EXPORT_SYMBOL(ib_dealloc_pd_user);
352
353 /* Address handles */
354
355 /**
356 * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination.
357 * @dest: Pointer to destination ah_attr. Contents of the destination
358 * pointer is assumed to be invalid and attribute are overwritten.
359 * @src: Pointer to source ah_attr.
360 */
361 void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
362 const struct rdma_ah_attr *src)
363 {
364 *dest = *src;
365 if (dest->grh.sgid_attr)
366 rdma_hold_gid_attr(dest->grh.sgid_attr);
367 }
368 EXPORT_SYMBOL(rdma_copy_ah_attr);
369
370 /**
371 * rdma_replace_ah_attr - Replace valid ah_attr with new new one.
372 * @old: Pointer to existing ah_attr which needs to be replaced.
373 * old is assumed to be valid or zero'd
374 * @new: Pointer to the new ah_attr.
375 *
376 * rdma_replace_ah_attr() first releases any reference in the old ah_attr if
377 * old the ah_attr is valid; after that it copies the new attribute and holds
378 * the reference to the replaced ah_attr.
379 */
380 void rdma_replace_ah_attr(struct rdma_ah_attr *old,
381 const struct rdma_ah_attr *new)
382 {
383 rdma_destroy_ah_attr(old);
384 *old = *new;
385 if (old->grh.sgid_attr)
386 rdma_hold_gid_attr(old->grh.sgid_attr);
387 }
388 EXPORT_SYMBOL(rdma_replace_ah_attr);
389
390 /**
391 * rdma_move_ah_attr - Move ah_attr pointed by source to destination.
392 * @dest: Pointer to destination ah_attr to copy to.
393 * dest is assumed to be valid or zero'd
394 * @src: Pointer to the new ah_attr.
395 *
396 * rdma_move_ah_attr() first releases any reference in the destination ah_attr
397 * if it is valid. This also transfers ownership of internal references from
398 * src to dest, making src invalid in the process. No new reference of the src
399 * ah_attr is taken.
400 */
401 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src)
402 {
403 rdma_destroy_ah_attr(dest);
404 *dest = *src;
405 src->grh.sgid_attr = NULL;
406 }
407 EXPORT_SYMBOL(rdma_move_ah_attr);
408
409 /*
410 * Validate that the rdma_ah_attr is valid for the device before passing it
411 * off to the driver.
412 */
413 static int rdma_check_ah_attr(struct ib_device *device,
414 struct rdma_ah_attr *ah_attr)
415 {
416 if (!rdma_is_port_valid(device, ah_attr->port_num))
417 return -EINVAL;
418
419 if ((rdma_is_grh_required(device, ah_attr->port_num) ||
420 ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) &&
421 !(ah_attr->ah_flags & IB_AH_GRH))
422 return -EINVAL;
423
424 if (ah_attr->grh.sgid_attr) {
425 /*
426 * Make sure the passed sgid_attr is consistent with the
427 * parameters
428 */
429 if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index ||
430 ah_attr->grh.sgid_attr->port_num != ah_attr->port_num)
431 return -EINVAL;
432 }
433 return 0;
434 }
435
436 /*
437 * If the ah requires a GRH then ensure that sgid_attr pointer is filled in.
438 * On success the caller is responsible to call rdma_unfill_sgid_attr().
439 */
440 static int rdma_fill_sgid_attr(struct ib_device *device,
441 struct rdma_ah_attr *ah_attr,
442 const struct ib_gid_attr **old_sgid_attr)
443 {
444 const struct ib_gid_attr *sgid_attr;
445 struct ib_global_route *grh;
446 int ret;
447
448 *old_sgid_attr = ah_attr->grh.sgid_attr;
449
450 ret = rdma_check_ah_attr(device, ah_attr);
451 if (ret)
452 return ret;
453
454 if (!(ah_attr->ah_flags & IB_AH_GRH))
455 return 0;
456
457 grh = rdma_ah_retrieve_grh(ah_attr);
458 if (grh->sgid_attr)
459 return 0;
460
461 sgid_attr =
462 rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index);
463 if (IS_ERR(sgid_attr))
464 return PTR_ERR(sgid_attr);
465
466 /* Move ownerhip of the kref into the ah_attr */
467 grh->sgid_attr = sgid_attr;
468 return 0;
469 }
470
471 static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr,
472 const struct ib_gid_attr *old_sgid_attr)
473 {
474 /*
475 * Fill didn't change anything, the caller retains ownership of
476 * whatever it passed
477 */
478 if (ah_attr->grh.sgid_attr == old_sgid_attr)
479 return;
480
481 /*
482 * Otherwise, we need to undo what rdma_fill_sgid_attr so the caller
483 * doesn't see any change in the rdma_ah_attr. If we get here
484 * old_sgid_attr is NULL.
485 */
486 rdma_destroy_ah_attr(ah_attr);
487 }
488
489 static const struct ib_gid_attr *
490 rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr,
491 const struct ib_gid_attr *old_attr)
492 {
493 if (old_attr)
494 rdma_put_gid_attr(old_attr);
495 if (ah_attr->ah_flags & IB_AH_GRH) {
496 rdma_hold_gid_attr(ah_attr->grh.sgid_attr);
497 return ah_attr->grh.sgid_attr;
498 }
499 return NULL;
500 }
501
502 static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
503 struct rdma_ah_attr *ah_attr,
504 u32 flags,
505 struct ib_udata *udata)
506 {
507 struct ib_device *device = pd->device;
508 struct ib_ah *ah;
509 int ret;
510
511 might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE);
512
513 if (!device->ops.create_ah)
514 return ERR_PTR(-EOPNOTSUPP);
515
516 ah = rdma_zalloc_drv_obj_gfp(
517 device, ib_ah,
518 (flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC);
519 if (!ah)
520 return ERR_PTR(-ENOMEM);
521
522 ah->device = device;
523 ah->pd = pd;
524 ah->type = ah_attr->type;
525 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL);
526
527 ret = device->ops.create_ah(ah, ah_attr, flags, udata);
528 if (ret) {
529 kfree(ah);
530 return ERR_PTR(ret);
531 }
532
533 atomic_inc(&pd->usecnt);
534 return ah;
535 }
536
537 /**
538 * rdma_create_ah - Creates an address handle for the
539 * given address vector.
540 * @pd: The protection domain associated with the address handle.
541 * @ah_attr: The attributes of the address vector.
542 * @flags: Create address handle flags (see enum rdma_create_ah_flags).
543 *
544 * It returns 0 on success and returns appropriate error code on error.
545 * The address handle is used to reference a local or global destination
546 * in all UD QP post sends.
547 */
548 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
549 u32 flags)
550 {
551 const struct ib_gid_attr *old_sgid_attr;
552 struct ib_ah *ah;
553 int ret;
554
555 ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
556 if (ret)
557 return ERR_PTR(ret);
558
559 ah = _rdma_create_ah(pd, ah_attr, flags, NULL);
560
561 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
562 return ah;
563 }
564 EXPORT_SYMBOL(rdma_create_ah);
565
566 /**
567 * rdma_create_user_ah - Creates an address handle for the
568 * given address vector.
569 * It resolves destination mac address for ah attribute of RoCE type.
570 * @pd: The protection domain associated with the address handle.
571 * @ah_attr: The attributes of the address vector.
572 * @udata: pointer to user's input output buffer information need by
573 * provider driver.
574 *
575 * It returns 0 on success and returns appropriate error code on error.
576 * The address handle is used to reference a local or global destination
577 * in all UD QP post sends.
578 */
579 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
580 struct rdma_ah_attr *ah_attr,
581 struct ib_udata *udata)
582 {
583 const struct ib_gid_attr *old_sgid_attr;
584 struct ib_ah *ah;
585 int err;
586
587 err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
588 if (err)
589 return ERR_PTR(err);
590
591 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
592 err = ib_resolve_eth_dmac(pd->device, ah_attr);
593 if (err) {
594 ah = ERR_PTR(err);
595 goto out;
596 }
597 }
598
599 ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE, udata);
600
601 out:
602 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
603 return ah;
604 }
605 EXPORT_SYMBOL(rdma_create_user_ah);
606
607 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)
608 {
609 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh;
610 struct iphdr ip4h_checked;
611 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh;
612
613 /* If it's IPv6, the version must be 6, otherwise, the first
614 * 20 bytes (before the IPv4 header) are garbled.
615 */
616 if (ip6h->version != 6)
617 return (ip4h->version == 4) ? 4 : 0;
618 /* version may be 6 or 4 because the first 20 bytes could be garbled */
619
620 /* RoCE v2 requires no options, thus header length
621 * must be 5 words
622 */
623 if (ip4h->ihl != 5)
624 return 6;
625
626 /* Verify checksum.
627 * We can't write on scattered buffers so we need to copy to
628 * temp buffer.
629 */
630 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
631 ip4h_checked.check = 0;
632 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5);
633 /* if IPv4 header checksum is OK, believe it */
634 if (ip4h->check == ip4h_checked.check)
635 return 4;
636 return 6;
637 }
638 EXPORT_SYMBOL(ib_get_rdma_header_version);
639
640 static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
641 u8 port_num,
642 const struct ib_grh *grh)
643 {
644 int grh_version;
645
646 if (rdma_protocol_ib(device, port_num))
647 return RDMA_NETWORK_IB;
648
649 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);
650
651 if (grh_version == 4)
652 return RDMA_NETWORK_IPV4;
653
654 if (grh->next_hdr == IPPROTO_UDP)
655 return RDMA_NETWORK_IPV6;
656
657 return RDMA_NETWORK_ROCE_V1;
658 }
659
660 struct find_gid_index_context {
661 u16 vlan_id;
662 enum ib_gid_type gid_type;
663 };
664
665 static bool find_gid_index(const union ib_gid *gid,
666 const struct ib_gid_attr *gid_attr,
667 void *context)
668 {
669 struct find_gid_index_context *ctx = context;
670 u16 vlan_id = 0xffff;
671 int ret;
672
673 if (ctx->gid_type != gid_attr->gid_type)
674 return false;
675
676 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL);
677 if (ret)
678 return false;
679
680 return ctx->vlan_id == vlan_id;
681 }
682
683 static const struct ib_gid_attr *
684 get_sgid_attr_from_eth(struct ib_device *device, u8 port_num,
685 u16 vlan_id, const union ib_gid *sgid,
686 enum ib_gid_type gid_type)
687 {
688 struct find_gid_index_context context = {.vlan_id = vlan_id,
689 .gid_type = gid_type};
690
691 return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index,
692 &context);
693 }
694
695 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
696 enum rdma_network_type net_type,
697 union ib_gid *sgid, union ib_gid *dgid)
698 {
699 struct sockaddr_in src_in;
700 struct sockaddr_in dst_in;
701 __be32 src_saddr, dst_saddr;
702
703 if (!sgid || !dgid)
704 return -EINVAL;
705
706 if (net_type == RDMA_NETWORK_IPV4) {
707 memcpy(&src_in.sin_addr.s_addr,
708 &hdr->roce4grh.saddr, 4);
709 memcpy(&dst_in.sin_addr.s_addr,
710 &hdr->roce4grh.daddr, 4);
711 src_saddr = src_in.sin_addr.s_addr;
712 dst_saddr = dst_in.sin_addr.s_addr;
713 ipv6_addr_set_v4mapped(src_saddr,
714 (struct in6_addr *)sgid);
715 ipv6_addr_set_v4mapped(dst_saddr,
716 (struct in6_addr *)dgid);
717 return 0;
718 } else if (net_type == RDMA_NETWORK_IPV6 ||
719 net_type == RDMA_NETWORK_IB) {
720 *dgid = hdr->ibgrh.dgid;
721 *sgid = hdr->ibgrh.sgid;
722 return 0;
723 } else {
724 return -EINVAL;
725 }
726 }
727 EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
728
729 /* Resolve destination mac address and hop limit for unicast destination
730 * GID entry, considering the source GID entry as well.
731 * ah_attribute must have have valid port_num, sgid_index.
732 */
733 static int ib_resolve_unicast_gid_dmac(struct ib_device *device,
734 struct rdma_ah_attr *ah_attr)
735 {
736 struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
737 const struct ib_gid_attr *sgid_attr = grh->sgid_attr;
738 int hop_limit = 0xff;
739 int ret = 0;
740
741 /* If destination is link local and source GID is RoCEv1,
742 * IP stack is not used.
743 */
744 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) &&
745 sgid_attr->gid_type == IB_GID_TYPE_ROCE) {
746 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
747 ah_attr->roce.dmac);
748 return ret;
749 }
750
751 ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid,
752 ah_attr->roce.dmac,
753 sgid_attr, &hop_limit);
754
755 grh->hop_limit = hop_limit;
756 return ret;
757 }
758
759 /*
760 * This function initializes address handle attributes from the incoming packet.
761 * Incoming packet has dgid of the receiver node on which this code is
762 * getting executed and, sgid contains the GID of the sender.
763 *
764 * When resolving mac address of destination, the arrived dgid is used
765 * as sgid and, sgid is used as dgid because sgid contains destinations
766 * GID whom to respond to.
767 *
768 * On success the caller is responsible to call rdma_destroy_ah_attr on the
769 * attr.
770 */
771 int ib_init_ah_attr_from_wc(struct ib_device *device, u8 port_num,
772 const struct ib_wc *wc, const struct ib_grh *grh,
773 struct rdma_ah_attr *ah_attr)
774 {
775 u32 flow_class;
776 int ret;
777 enum rdma_network_type net_type = RDMA_NETWORK_IB;
778 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
779 const struct ib_gid_attr *sgid_attr;
780 int hoplimit = 0xff;
781 union ib_gid dgid;
782 union ib_gid sgid;
783
784 might_sleep();
785
786 memset(ah_attr, 0, sizeof *ah_attr);
787 ah_attr->type = rdma_ah_find_type(device, port_num);
788 if (rdma_cap_eth_ah(device, port_num)) {
789 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
790 net_type = wc->network_hdr_type;
791 else
792 net_type = ib_get_net_type_by_grh(device, port_num, grh);
793 gid_type = ib_network_to_gid_type(net_type);
794 }
795 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
796 &sgid, &dgid);
797 if (ret)
798 return ret;
799
800 rdma_ah_set_sl(ah_attr, wc->sl);
801 rdma_ah_set_port_num(ah_attr, port_num);
802
803 if (rdma_protocol_roce(device, port_num)) {
804 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
805 wc->vlan_id : 0xffff;
806
807 if (!(wc->wc_flags & IB_WC_GRH))
808 return -EPROTOTYPE;
809
810 sgid_attr = get_sgid_attr_from_eth(device, port_num,
811 vlan_id, &dgid,
812 gid_type);
813 if (IS_ERR(sgid_attr))
814 return PTR_ERR(sgid_attr);
815
816 flow_class = be32_to_cpu(grh->version_tclass_flow);
817 rdma_move_grh_sgid_attr(ah_attr,
818 &sgid,
819 flow_class & 0xFFFFF,
820 hoplimit,
821 (flow_class >> 20) & 0xFF,
822 sgid_attr);
823
824 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
825 if (ret)
826 rdma_destroy_ah_attr(ah_attr);
827
828 return ret;
829 } else {
830 rdma_ah_set_dlid(ah_attr, wc->slid);
831 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
832
833 if ((wc->wc_flags & IB_WC_GRH) == 0)
834 return 0;
835
836 if (dgid.global.interface_id !=
837 cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
838 sgid_attr = rdma_find_gid_by_port(
839 device, &dgid, IB_GID_TYPE_IB, port_num, NULL);
840 } else
841 sgid_attr = rdma_get_gid_attr(device, port_num, 0);
842
843 if (IS_ERR(sgid_attr))
844 return PTR_ERR(sgid_attr);
845 flow_class = be32_to_cpu(grh->version_tclass_flow);
846 rdma_move_grh_sgid_attr(ah_attr,
847 &sgid,
848 flow_class & 0xFFFFF,
849 hoplimit,
850 (flow_class >> 20) & 0xFF,
851 sgid_attr);
852
853 return 0;
854 }
855 }
856 EXPORT_SYMBOL(ib_init_ah_attr_from_wc);
857
858 /**
859 * rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership
860 * of the reference
861 *
862 * @attr: Pointer to AH attribute structure
863 * @dgid: Destination GID
864 * @flow_label: Flow label
865 * @hop_limit: Hop limit
866 * @traffic_class: traffic class
867 * @sgid_attr: Pointer to SGID attribute
868 *
869 * This takes ownership of the sgid_attr reference. The caller must ensure
870 * rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after
871 * calling this function.
872 */
873 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,
874 u32 flow_label, u8 hop_limit, u8 traffic_class,
875 const struct ib_gid_attr *sgid_attr)
876 {
877 rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit,
878 traffic_class);
879 attr->grh.sgid_attr = sgid_attr;
880 }
881 EXPORT_SYMBOL(rdma_move_grh_sgid_attr);
882
883 /**
884 * rdma_destroy_ah_attr - Release reference to SGID attribute of
885 * ah attribute.
886 * @ah_attr: Pointer to ah attribute
887 *
888 * Release reference to the SGID attribute of the ah attribute if it is
889 * non NULL. It is safe to call this multiple times, and safe to call it on
890 * a zero initialized ah_attr.
891 */
892 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr)
893 {
894 if (ah_attr->grh.sgid_attr) {
895 rdma_put_gid_attr(ah_attr->grh.sgid_attr);
896 ah_attr->grh.sgid_attr = NULL;
897 }
898 }
899 EXPORT_SYMBOL(rdma_destroy_ah_attr);
900
901 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
902 const struct ib_grh *grh, u8 port_num)
903 {
904 struct rdma_ah_attr ah_attr;
905 struct ib_ah *ah;
906 int ret;
907
908 ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);
909 if (ret)
910 return ERR_PTR(ret);
911
912 ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE);
913
914 rdma_destroy_ah_attr(&ah_attr);
915 return ah;
916 }
917 EXPORT_SYMBOL(ib_create_ah_from_wc);
918
919 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
920 {
921 const struct ib_gid_attr *old_sgid_attr;
922 int ret;
923
924 if (ah->type != ah_attr->type)
925 return -EINVAL;
926
927 ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);
928 if (ret)
929 return ret;
930
931 ret = ah->device->ops.modify_ah ?
932 ah->device->ops.modify_ah(ah, ah_attr) :
933 -EOPNOTSUPP;
934
935 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);
936 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
937 return ret;
938 }
939 EXPORT_SYMBOL(rdma_modify_ah);
940
941 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
942 {
943 ah_attr->grh.sgid_attr = NULL;
944
945 return ah->device->ops.query_ah ?
946 ah->device->ops.query_ah(ah, ah_attr) :
947 -EOPNOTSUPP;
948 }
949 EXPORT_SYMBOL(rdma_query_ah);
950
951 int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata)
952 {
953 const struct ib_gid_attr *sgid_attr = ah->sgid_attr;
954 struct ib_pd *pd;
955
956 might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE);
957
958 pd = ah->pd;
959
960 ah->device->ops.destroy_ah(ah, flags);
961 atomic_dec(&pd->usecnt);
962 if (sgid_attr)
963 rdma_put_gid_attr(sgid_attr);
964
965 kfree(ah);
966 return 0;
967 }
968 EXPORT_SYMBOL(rdma_destroy_ah_user);
969
970 /* Shared receive queues */
971
972 struct ib_srq *ib_create_srq(struct ib_pd *pd,
973 struct ib_srq_init_attr *srq_init_attr)
974 {
975 struct ib_srq *srq;
976 int ret;
977
978 if (!pd->device->ops.create_srq)
979 return ERR_PTR(-EOPNOTSUPP);
980
981 srq = rdma_zalloc_drv_obj(pd->device, ib_srq);
982 if (!srq)
983 return ERR_PTR(-ENOMEM);
984
985 srq->device = pd->device;
986 srq->pd = pd;
987 srq->event_handler = srq_init_attr->event_handler;
988 srq->srq_context = srq_init_attr->srq_context;
989 srq->srq_type = srq_init_attr->srq_type;
990
991 if (ib_srq_has_cq(srq->srq_type)) {
992 srq->ext.cq = srq_init_attr->ext.cq;
993 atomic_inc(&srq->ext.cq->usecnt);
994 }
995 if (srq->srq_type == IB_SRQT_XRC) {
996 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
997 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
998 }
999 atomic_inc(&pd->usecnt);
1000
1001 ret = pd->device->ops.create_srq(srq, srq_init_attr, NULL);
1002 if (ret) {
1003 atomic_dec(&srq->pd->usecnt);
1004 if (srq->srq_type == IB_SRQT_XRC)
1005 atomic_dec(&srq->ext.xrc.xrcd->usecnt);
1006 if (ib_srq_has_cq(srq->srq_type))
1007 atomic_dec(&srq->ext.cq->usecnt);
1008 kfree(srq);
1009 return ERR_PTR(ret);
1010 }
1011
1012 return srq;
1013 }
1014 EXPORT_SYMBOL(ib_create_srq);
1015
1016 int ib_modify_srq(struct ib_srq *srq,
1017 struct ib_srq_attr *srq_attr,
1018 enum ib_srq_attr_mask srq_attr_mask)
1019 {
1020 return srq->device->ops.modify_srq ?
1021 srq->device->ops.modify_srq(srq, srq_attr, srq_attr_mask,
1022 NULL) : -EOPNOTSUPP;
1023 }
1024 EXPORT_SYMBOL(ib_modify_srq);
1025
1026 int ib_query_srq(struct ib_srq *srq,
1027 struct ib_srq_attr *srq_attr)
1028 {
1029 return srq->device->ops.query_srq ?
1030 srq->device->ops.query_srq(srq, srq_attr) : -EOPNOTSUPP;
1031 }
1032 EXPORT_SYMBOL(ib_query_srq);
1033
1034 int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata)
1035 {
1036 if (atomic_read(&srq->usecnt))
1037 return -EBUSY;
1038
1039 srq->device->ops.destroy_srq(srq, udata);
1040
1041 atomic_dec(&srq->pd->usecnt);
1042 if (srq->srq_type == IB_SRQT_XRC)
1043 atomic_dec(&srq->ext.xrc.xrcd->usecnt);
1044 if (ib_srq_has_cq(srq->srq_type))
1045 atomic_dec(&srq->ext.cq->usecnt);
1046 kfree(srq);
1047
1048 return 0;
1049 }
1050 EXPORT_SYMBOL(ib_destroy_srq_user);
1051
1052 /* Queue pairs */
1053
1054 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
1055 {
1056 struct ib_qp *qp = context;
1057 unsigned long flags;
1058
1059 spin_lock_irqsave(&qp->device->qp_open_list_lock, flags);
1060 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
1061 if (event->element.qp->event_handler)
1062 event->element.qp->event_handler(event, event->element.qp->qp_context);
1063 spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags);
1064 }
1065
1066 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
1067 {
1068 mutex_lock(&xrcd->tgt_qp_mutex);
1069 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
1070 mutex_unlock(&xrcd->tgt_qp_mutex);
1071 }
1072
1073 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
1074 void (*event_handler)(struct ib_event *, void *),
1075 void *qp_context)
1076 {
1077 struct ib_qp *qp;
1078 unsigned long flags;
1079 int err;
1080
1081 qp = kzalloc(sizeof *qp, GFP_KERNEL);
1082 if (!qp)
1083 return ERR_PTR(-ENOMEM);
1084
1085 qp->real_qp = real_qp;
1086 err = ib_open_shared_qp_security(qp, real_qp->device);
1087 if (err) {
1088 kfree(qp);
1089 return ERR_PTR(err);
1090 }
1091
1092 qp->real_qp = real_qp;
1093 atomic_inc(&real_qp->usecnt);
1094 qp->device = real_qp->device;
1095 qp->event_handler = event_handler;
1096 qp->qp_context = qp_context;
1097 qp->qp_num = real_qp->qp_num;
1098 qp->qp_type = real_qp->qp_type;
1099
1100 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
1101 list_add(&qp->open_list, &real_qp->open_list);
1102 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
1103
1104 return qp;
1105 }
1106
1107 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
1108 struct ib_qp_open_attr *qp_open_attr)
1109 {
1110 struct ib_qp *qp, *real_qp;
1111
1112 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
1113 return ERR_PTR(-EINVAL);
1114
1115 qp = ERR_PTR(-EINVAL);
1116 mutex_lock(&xrcd->tgt_qp_mutex);
1117 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
1118 if (real_qp->qp_num == qp_open_attr->qp_num) {
1119 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
1120 qp_open_attr->qp_context);
1121 break;
1122 }
1123 }
1124 mutex_unlock(&xrcd->tgt_qp_mutex);
1125 return qp;
1126 }
1127 EXPORT_SYMBOL(ib_open_qp);
1128
1129 static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp,
1130 struct ib_qp_init_attr *qp_init_attr,
1131 struct ib_udata *udata)
1132 {
1133 struct ib_qp *real_qp = qp;
1134
1135 qp->event_handler = __ib_shared_qp_event_handler;
1136 qp->qp_context = qp;
1137 qp->pd = NULL;
1138 qp->send_cq = qp->recv_cq = NULL;
1139 qp->srq = NULL;
1140 qp->xrcd = qp_init_attr->xrcd;
1141 atomic_inc(&qp_init_attr->xrcd->usecnt);
1142 INIT_LIST_HEAD(&qp->open_list);
1143
1144 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
1145 qp_init_attr->qp_context);
1146 if (IS_ERR(qp))
1147 return qp;
1148
1149 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
1150 return qp;
1151 }
1152
1153 struct ib_qp *ib_create_qp_user(struct ib_pd *pd,
1154 struct ib_qp_init_attr *qp_init_attr,
1155 struct ib_udata *udata)
1156 {
1157 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
1158 struct ib_qp *qp;
1159 int ret;
1160
1161 if (qp_init_attr->rwq_ind_tbl &&
1162 (qp_init_attr->recv_cq ||
1163 qp_init_attr->srq || qp_init_attr->cap.max_recv_wr ||
1164 qp_init_attr->cap.max_recv_sge))
1165 return ERR_PTR(-EINVAL);
1166
1167 if ((qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN) &&
1168 !(device->attrs.device_cap_flags & IB_DEVICE_INTEGRITY_HANDOVER))
1169 return ERR_PTR(-EINVAL);
1170
1171 /*
1172 * If the callers is using the RDMA API calculate the resources
1173 * needed for the RDMA READ/WRITE operations.
1174 *
1175 * Note that these callers need to pass in a port number.
1176 */
1177 if (qp_init_attr->cap.max_rdma_ctxs)
1178 rdma_rw_init_qp(device, qp_init_attr);
1179
1180 qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL);
1181 if (IS_ERR(qp))
1182 return qp;
1183
1184 ret = ib_create_qp_security(qp, device);
1185 if (ret)
1186 goto err;
1187
1188 qp->qp_type = qp_init_attr->qp_type;
1189 qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
1190
1191 atomic_set(&qp->usecnt, 0);
1192 qp->mrs_used = 0;
1193 spin_lock_init(&qp->mr_lock);
1194 INIT_LIST_HEAD(&qp->rdma_mrs);
1195 INIT_LIST_HEAD(&qp->sig_mrs);
1196 qp->port = 0;
1197
1198 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
1199 struct ib_qp *xrc_qp =
1200 create_xrc_qp_user(qp, qp_init_attr, udata);
1201
1202 if (IS_ERR(xrc_qp)) {
1203 ret = PTR_ERR(xrc_qp);
1204 goto err;
1205 }
1206 return xrc_qp;
1207 }
1208
1209 qp->event_handler = qp_init_attr->event_handler;
1210 qp->qp_context = qp_init_attr->qp_context;
1211 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
1212 qp->recv_cq = NULL;
1213 qp->srq = NULL;
1214 } else {
1215 qp->recv_cq = qp_init_attr->recv_cq;
1216 if (qp_init_attr->recv_cq)
1217 atomic_inc(&qp_init_attr->recv_cq->usecnt);
1218 qp->srq = qp_init_attr->srq;
1219 if (qp->srq)
1220 atomic_inc(&qp_init_attr->srq->usecnt);
1221 }
1222
1223 qp->send_cq = qp_init_attr->send_cq;
1224 qp->xrcd = NULL;
1225
1226 atomic_inc(&pd->usecnt);
1227 if (qp_init_attr->send_cq)
1228 atomic_inc(&qp_init_attr->send_cq->usecnt);
1229 if (qp_init_attr->rwq_ind_tbl)
1230 atomic_inc(&qp->rwq_ind_tbl->usecnt);
1231
1232 if (qp_init_attr->cap.max_rdma_ctxs) {
1233 ret = rdma_rw_init_mrs(qp, qp_init_attr);
1234 if (ret)
1235 goto err;
1236 }
1237
1238 /*
1239 * Note: all hw drivers guarantee that max_send_sge is lower than
1240 * the device RDMA WRITE SGE limit but not all hw drivers ensure that
1241 * max_send_sge <= max_sge_rd.
1242 */
1243 qp->max_write_sge = qp_init_attr->cap.max_send_sge;
1244 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,
1245 device->attrs.max_sge_rd);
1246 if (qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN)
1247 qp->integrity_en = true;
1248
1249 return qp;
1250
1251 err:
1252 ib_destroy_qp(qp);
1253 return ERR_PTR(ret);
1254
1255 }
1256 EXPORT_SYMBOL(ib_create_qp_user);
1257
1258 static const struct {
1259 int valid;
1260 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
1261 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
1262 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
1263 [IB_QPS_RESET] = {
1264 [IB_QPS_RESET] = { .valid = 1 },
1265 [IB_QPS_INIT] = {
1266 .valid = 1,
1267 .req_param = {
1268 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1269 IB_QP_PORT |
1270 IB_QP_QKEY),
1271 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
1272 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
1273 IB_QP_PORT |
1274 IB_QP_ACCESS_FLAGS),
1275 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
1276 IB_QP_PORT |
1277 IB_QP_ACCESS_FLAGS),
1278 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
1279 IB_QP_PORT |
1280 IB_QP_ACCESS_FLAGS),
1281 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
1282 IB_QP_PORT |
1283 IB_QP_ACCESS_FLAGS),
1284 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1285 IB_QP_QKEY),
1286 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1287 IB_QP_QKEY),
1288 }
1289 },
1290 },
1291 [IB_QPS_INIT] = {
1292 [IB_QPS_RESET] = { .valid = 1 },
1293 [IB_QPS_ERR] = { .valid = 1 },
1294 [IB_QPS_INIT] = {
1295 .valid = 1,
1296 .opt_param = {
1297 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1298 IB_QP_PORT |
1299 IB_QP_QKEY),
1300 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
1301 IB_QP_PORT |
1302 IB_QP_ACCESS_FLAGS),
1303 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
1304 IB_QP_PORT |
1305 IB_QP_ACCESS_FLAGS),
1306 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
1307 IB_QP_PORT |
1308 IB_QP_ACCESS_FLAGS),
1309 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
1310 IB_QP_PORT |
1311 IB_QP_ACCESS_FLAGS),
1312 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1313 IB_QP_QKEY),
1314 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1315 IB_QP_QKEY),
1316 }
1317 },
1318 [IB_QPS_RTR] = {
1319 .valid = 1,
1320 .req_param = {
1321 [IB_QPT_UC] = (IB_QP_AV |
1322 IB_QP_PATH_MTU |
1323 IB_QP_DEST_QPN |
1324 IB_QP_RQ_PSN),
1325 [IB_QPT_RC] = (IB_QP_AV |
1326 IB_QP_PATH_MTU |
1327 IB_QP_DEST_QPN |
1328 IB_QP_RQ_PSN |
1329 IB_QP_MAX_DEST_RD_ATOMIC |
1330 IB_QP_MIN_RNR_TIMER),
1331 [IB_QPT_XRC_INI] = (IB_QP_AV |
1332 IB_QP_PATH_MTU |
1333 IB_QP_DEST_QPN |
1334 IB_QP_RQ_PSN),
1335 [IB_QPT_XRC_TGT] = (IB_QP_AV |
1336 IB_QP_PATH_MTU |
1337 IB_QP_DEST_QPN |
1338 IB_QP_RQ_PSN |
1339 IB_QP_MAX_DEST_RD_ATOMIC |
1340 IB_QP_MIN_RNR_TIMER),
1341 },
1342 .opt_param = {
1343 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1344 IB_QP_QKEY),
1345 [IB_QPT_UC] = (IB_QP_ALT_PATH |
1346 IB_QP_ACCESS_FLAGS |
1347 IB_QP_PKEY_INDEX),
1348 [IB_QPT_RC] = (IB_QP_ALT_PATH |
1349 IB_QP_ACCESS_FLAGS |
1350 IB_QP_PKEY_INDEX),
1351 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
1352 IB_QP_ACCESS_FLAGS |
1353 IB_QP_PKEY_INDEX),
1354 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
1355 IB_QP_ACCESS_FLAGS |
1356 IB_QP_PKEY_INDEX),
1357 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1358 IB_QP_QKEY),
1359 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1360 IB_QP_QKEY),
1361 },
1362 },
1363 },
1364 [IB_QPS_RTR] = {
1365 [IB_QPS_RESET] = { .valid = 1 },
1366 [IB_QPS_ERR] = { .valid = 1 },
1367 [IB_QPS_RTS] = {
1368 .valid = 1,
1369 .req_param = {
1370 [IB_QPT_UD] = IB_QP_SQ_PSN,
1371 [IB_QPT_UC] = IB_QP_SQ_PSN,
1372 [IB_QPT_RC] = (IB_QP_TIMEOUT |
1373 IB_QP_RETRY_CNT |
1374 IB_QP_RNR_RETRY |
1375 IB_QP_SQ_PSN |
1376 IB_QP_MAX_QP_RD_ATOMIC),
1377 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
1378 IB_QP_RETRY_CNT |
1379 IB_QP_RNR_RETRY |
1380 IB_QP_SQ_PSN |
1381 IB_QP_MAX_QP_RD_ATOMIC),
1382 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
1383 IB_QP_SQ_PSN),
1384 [IB_QPT_SMI] = IB_QP_SQ_PSN,
1385 [IB_QPT_GSI] = IB_QP_SQ_PSN,
1386 },
1387 .opt_param = {
1388 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1389 IB_QP_QKEY),
1390 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1391 IB_QP_ALT_PATH |
1392 IB_QP_ACCESS_FLAGS |
1393 IB_QP_PATH_MIG_STATE),
1394 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1395 IB_QP_ALT_PATH |
1396 IB_QP_ACCESS_FLAGS |
1397 IB_QP_MIN_RNR_TIMER |
1398 IB_QP_PATH_MIG_STATE),
1399 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1400 IB_QP_ALT_PATH |
1401 IB_QP_ACCESS_FLAGS |
1402 IB_QP_PATH_MIG_STATE),
1403 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1404 IB_QP_ALT_PATH |
1405 IB_QP_ACCESS_FLAGS |
1406 IB_QP_MIN_RNR_TIMER |
1407 IB_QP_PATH_MIG_STATE),
1408 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1409 IB_QP_QKEY),
1410 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1411 IB_QP_QKEY),
1412 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1413 }
1414 }
1415 },
1416 [IB_QPS_RTS] = {
1417 [IB_QPS_RESET] = { .valid = 1 },
1418 [IB_QPS_ERR] = { .valid = 1 },
1419 [IB_QPS_RTS] = {
1420 .valid = 1,
1421 .opt_param = {
1422 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1423 IB_QP_QKEY),
1424 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1425 IB_QP_ACCESS_FLAGS |
1426 IB_QP_ALT_PATH |
1427 IB_QP_PATH_MIG_STATE),
1428 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1429 IB_QP_ACCESS_FLAGS |
1430 IB_QP_ALT_PATH |
1431 IB_QP_PATH_MIG_STATE |
1432 IB_QP_MIN_RNR_TIMER),
1433 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1434 IB_QP_ACCESS_FLAGS |
1435 IB_QP_ALT_PATH |
1436 IB_QP_PATH_MIG_STATE),
1437 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1438 IB_QP_ACCESS_FLAGS |
1439 IB_QP_ALT_PATH |
1440 IB_QP_PATH_MIG_STATE |
1441 IB_QP_MIN_RNR_TIMER),
1442 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1443 IB_QP_QKEY),
1444 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1445 IB_QP_QKEY),
1446 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1447 }
1448 },
1449 [IB_QPS_SQD] = {
1450 .valid = 1,
1451 .opt_param = {
1452 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1453 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1454 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1455 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1456 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
1457 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1458 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
1459 }
1460 },
1461 },
1462 [IB_QPS_SQD] = {
1463 [IB_QPS_RESET] = { .valid = 1 },
1464 [IB_QPS_ERR] = { .valid = 1 },
1465 [IB_QPS_RTS] = {
1466 .valid = 1,
1467 .opt_param = {
1468 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1469 IB_QP_QKEY),
1470 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1471 IB_QP_ALT_PATH |
1472 IB_QP_ACCESS_FLAGS |
1473 IB_QP_PATH_MIG_STATE),
1474 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1475 IB_QP_ALT_PATH |
1476 IB_QP_ACCESS_FLAGS |
1477 IB_QP_MIN_RNR_TIMER |
1478 IB_QP_PATH_MIG_STATE),
1479 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1480 IB_QP_ALT_PATH |
1481 IB_QP_ACCESS_FLAGS |
1482 IB_QP_PATH_MIG_STATE),
1483 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1484 IB_QP_ALT_PATH |
1485 IB_QP_ACCESS_FLAGS |
1486 IB_QP_MIN_RNR_TIMER |
1487 IB_QP_PATH_MIG_STATE),
1488 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1489 IB_QP_QKEY),
1490 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1491 IB_QP_QKEY),
1492 }
1493 },
1494 [IB_QPS_SQD] = {
1495 .valid = 1,
1496 .opt_param = {
1497 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1498 IB_QP_QKEY),
1499 [IB_QPT_UC] = (IB_QP_AV |
1500 IB_QP_ALT_PATH |
1501 IB_QP_ACCESS_FLAGS |
1502 IB_QP_PKEY_INDEX |
1503 IB_QP_PATH_MIG_STATE),
1504 [IB_QPT_RC] = (IB_QP_PORT |
1505 IB_QP_AV |
1506 IB_QP_TIMEOUT |
1507 IB_QP_RETRY_CNT |
1508 IB_QP_RNR_RETRY |
1509 IB_QP_MAX_QP_RD_ATOMIC |
1510 IB_QP_MAX_DEST_RD_ATOMIC |
1511 IB_QP_ALT_PATH |
1512 IB_QP_ACCESS_FLAGS |
1513 IB_QP_PKEY_INDEX |
1514 IB_QP_MIN_RNR_TIMER |
1515 IB_QP_PATH_MIG_STATE),
1516 [IB_QPT_XRC_INI] = (IB_QP_PORT |
1517 IB_QP_AV |
1518 IB_QP_TIMEOUT |
1519 IB_QP_RETRY_CNT |
1520 IB_QP_RNR_RETRY |
1521 IB_QP_MAX_QP_RD_ATOMIC |
1522 IB_QP_ALT_PATH |
1523 IB_QP_ACCESS_FLAGS |
1524 IB_QP_PKEY_INDEX |
1525 IB_QP_PATH_MIG_STATE),
1526 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
1527 IB_QP_AV |
1528 IB_QP_TIMEOUT |
1529 IB_QP_MAX_DEST_RD_ATOMIC |
1530 IB_QP_ALT_PATH |
1531 IB_QP_ACCESS_FLAGS |
1532 IB_QP_PKEY_INDEX |
1533 IB_QP_MIN_RNR_TIMER |
1534 IB_QP_PATH_MIG_STATE),
1535 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1536 IB_QP_QKEY),
1537 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1538 IB_QP_QKEY),
1539 }
1540 }
1541 },
1542 [IB_QPS_SQE] = {
1543 [IB_QPS_RESET] = { .valid = 1 },
1544 [IB_QPS_ERR] = { .valid = 1 },
1545 [IB_QPS_RTS] = {
1546 .valid = 1,
1547 .opt_param = {
1548 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1549 IB_QP_QKEY),
1550 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1551 IB_QP_ACCESS_FLAGS),
1552 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1553 IB_QP_QKEY),
1554 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1555 IB_QP_QKEY),
1556 }
1557 }
1558 },
1559 [IB_QPS_ERR] = {
1560 [IB_QPS_RESET] = { .valid = 1 },
1561 [IB_QPS_ERR] = { .valid = 1 }
1562 }
1563 };
1564
1565 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1566 enum ib_qp_type type, enum ib_qp_attr_mask mask)
1567 {
1568 enum ib_qp_attr_mask req_param, opt_param;
1569
1570 if (mask & IB_QP_CUR_STATE &&
1571 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
1572 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
1573 return false;
1574
1575 if (!qp_state_table[cur_state][next_state].valid)
1576 return false;
1577
1578 req_param = qp_state_table[cur_state][next_state].req_param[type];
1579 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
1580
1581 if ((mask & req_param) != req_param)
1582 return false;
1583
1584 if (mask & ~(req_param | opt_param | IB_QP_STATE))
1585 return false;
1586
1587 return true;
1588 }
1589 EXPORT_SYMBOL(ib_modify_qp_is_ok);
1590
1591 /**
1592 * ib_resolve_eth_dmac - Resolve destination mac address
1593 * @device: Device to consider
1594 * @ah_attr: address handle attribute which describes the
1595 * source and destination parameters
1596 * ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It
1597 * returns 0 on success or appropriate error code. It initializes the
1598 * necessary ah_attr fields when call is successful.
1599 */
1600 static int ib_resolve_eth_dmac(struct ib_device *device,
1601 struct rdma_ah_attr *ah_attr)
1602 {
1603 int ret = 0;
1604
1605 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1606 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1607 __be32 addr = 0;
1608
1609 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
1610 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);
1611 } else {
1612 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
1613 (char *)ah_attr->roce.dmac);
1614 }
1615 } else {
1616 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
1617 }
1618 return ret;
1619 }
1620
1621 static bool is_qp_type_connected(const struct ib_qp *qp)
1622 {
1623 return (qp->qp_type == IB_QPT_UC ||
1624 qp->qp_type == IB_QPT_RC ||
1625 qp->qp_type == IB_QPT_XRC_INI ||
1626 qp->qp_type == IB_QPT_XRC_TGT);
1627 }
1628
1629 /**
1630 * IB core internal function to perform QP attributes modification.
1631 */
1632 static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
1633 int attr_mask, struct ib_udata *udata)
1634 {
1635 u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1636 const struct ib_gid_attr *old_sgid_attr_av;
1637 const struct ib_gid_attr *old_sgid_attr_alt_av;
1638 int ret;
1639
1640 if (attr_mask & IB_QP_AV) {
1641 ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr,
1642 &old_sgid_attr_av);
1643 if (ret)
1644 return ret;
1645 }
1646 if (attr_mask & IB_QP_ALT_PATH) {
1647 /*
1648 * FIXME: This does not track the migration state, so if the
1649 * user loads a new alternate path after the HW has migrated
1650 * from primary->alternate we will keep the wrong
1651 * references. This is OK for IB because the reference
1652 * counting does not serve any functional purpose.
1653 */
1654 ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
1655 &old_sgid_attr_alt_av);
1656 if (ret)
1657 goto out_av;
1658
1659 /*
1660 * Today the core code can only handle alternate paths and APM
1661 * for IB. Ban them in roce mode.
1662 */
1663 if (!(rdma_protocol_ib(qp->device,
1664 attr->alt_ah_attr.port_num) &&
1665 rdma_protocol_ib(qp->device, port))) {
1666 ret = EINVAL;
1667 goto out;
1668 }
1669 }
1670
1671 /*
1672 * If the user provided the qp_attr then we have to resolve it. Kernel
1673 * users have to provide already resolved rdma_ah_attr's
1674 */
1675 if (udata && (attr_mask & IB_QP_AV) &&
1676 attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE &&
1677 is_qp_type_connected(qp)) {
1678 ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
1679 if (ret)
1680 goto out;
1681 }
1682
1683 if (rdma_ib_or_roce(qp->device, port)) {
1684 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {
1685 dev_warn(&qp->device->dev,
1686 "%s rq_psn overflow, masking to 24 bits\n",
1687 __func__);
1688 attr->rq_psn &= 0xffffff;
1689 }
1690
1691 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {
1692 dev_warn(&qp->device->dev,
1693 " %s sq_psn overflow, masking to 24 bits\n",
1694 __func__);
1695 attr->sq_psn &= 0xffffff;
1696 }
1697 }
1698
1699 /*
1700 * Bind this qp to a counter automatically based on the rdma counter
1701 * rules. This only set in RST2INIT with port specified
1702 */
1703 if (!qp->counter && (attr_mask & IB_QP_PORT) &&
1704 ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT))
1705 rdma_counter_bind_qp_auto(qp, attr->port_num);
1706
1707 ret = ib_security_modify_qp(qp, attr, attr_mask, udata);
1708 if (ret)
1709 goto out;
1710
1711 if (attr_mask & IB_QP_PORT)
1712 qp->port = attr->port_num;
1713 if (attr_mask & IB_QP_AV)
1714 qp->av_sgid_attr =
1715 rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr);
1716 if (attr_mask & IB_QP_ALT_PATH)
1717 qp->alt_path_sgid_attr = rdma_update_sgid_attr(
1718 &attr->alt_ah_attr, qp->alt_path_sgid_attr);
1719
1720 out:
1721 if (attr_mask & IB_QP_ALT_PATH)
1722 rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av);
1723 out_av:
1724 if (attr_mask & IB_QP_AV)
1725 rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av);
1726 return ret;
1727 }
1728
1729 /**
1730 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
1731 * @ib_qp: The QP to modify.
1732 * @attr: On input, specifies the QP attributes to modify. On output,
1733 * the current values of selected QP attributes are returned.
1734 * @attr_mask: A bit-mask used to specify which attributes of the QP
1735 * are being modified.
1736 * @udata: pointer to user's input output buffer information
1737 * are being modified.
1738 * It returns 0 on success and returns appropriate error code on error.
1739 */
1740 int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,
1741 int attr_mask, struct ib_udata *udata)
1742 {
1743 return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);
1744 }
1745 EXPORT_SYMBOL(ib_modify_qp_with_udata);
1746
1747 int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width)
1748 {
1749 int rc;
1750 u32 netdev_speed;
1751 struct net_device *netdev;
1752 struct ethtool_link_ksettings lksettings;
1753
1754 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET)
1755 return -EINVAL;
1756
1757 netdev = ib_device_get_netdev(dev, port_num);
1758 if (!netdev)
1759 return -ENODEV;
1760
1761 rtnl_lock();
1762 rc = __ethtool_get_link_ksettings(netdev, &lksettings);
1763 rtnl_unlock();
1764
1765 dev_put(netdev);
1766
1767 if (!rc) {
1768 netdev_speed = lksettings.base.speed;
1769 } else {
1770 netdev_speed = SPEED_1000;
1771 pr_warn("%s speed is unknown, defaulting to %d\n", netdev->name,
1772 netdev_speed);
1773 }
1774
1775 if (netdev_speed <= SPEED_1000) {
1776 *width = IB_WIDTH_1X;
1777 *speed = IB_SPEED_SDR;
1778 } else if (netdev_speed <= SPEED_10000) {
1779 *width = IB_WIDTH_1X;
1780 *speed = IB_SPEED_FDR10;
1781 } else if (netdev_speed <= SPEED_20000) {
1782 *width = IB_WIDTH_4X;
1783 *speed = IB_SPEED_DDR;
1784 } else if (netdev_speed <= SPEED_25000) {
1785 *width = IB_WIDTH_1X;
1786 *speed = IB_SPEED_EDR;
1787 } else if (netdev_speed <= SPEED_40000) {
1788 *width = IB_WIDTH_4X;
1789 *speed = IB_SPEED_FDR10;
1790 } else {
1791 *width = IB_WIDTH_4X;
1792 *speed = IB_SPEED_EDR;
1793 }
1794
1795 return 0;
1796 }
1797 EXPORT_SYMBOL(ib_get_eth_speed);
1798
1799 int ib_modify_qp(struct ib_qp *qp,
1800 struct ib_qp_attr *qp_attr,
1801 int qp_attr_mask)
1802 {
1803 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1804 }
1805 EXPORT_SYMBOL(ib_modify_qp);
1806
1807 int ib_query_qp(struct ib_qp *qp,
1808 struct ib_qp_attr *qp_attr,
1809 int qp_attr_mask,
1810 struct ib_qp_init_attr *qp_init_attr)
1811 {
1812 qp_attr->ah_attr.grh.sgid_attr = NULL;
1813 qp_attr->alt_ah_attr.grh.sgid_attr = NULL;
1814
1815 return qp->device->ops.query_qp ?
1816 qp->device->ops.query_qp(qp->real_qp, qp_attr, qp_attr_mask,
1817 qp_init_attr) : -EOPNOTSUPP;
1818 }
1819 EXPORT_SYMBOL(ib_query_qp);
1820
1821 int ib_close_qp(struct ib_qp *qp)
1822 {
1823 struct ib_qp *real_qp;
1824 unsigned long flags;
1825
1826 real_qp = qp->real_qp;
1827 if (real_qp == qp)
1828 return -EINVAL;
1829
1830 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
1831 list_del(&qp->open_list);
1832 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
1833
1834 atomic_dec(&real_qp->usecnt);
1835 if (qp->qp_sec)
1836 ib_close_shared_qp_security(qp->qp_sec);
1837 kfree(qp);
1838
1839 return 0;
1840 }
1841 EXPORT_SYMBOL(ib_close_qp);
1842
1843 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1844 {
1845 struct ib_xrcd *xrcd;
1846 struct ib_qp *real_qp;
1847 int ret;
1848
1849 real_qp = qp->real_qp;
1850 xrcd = real_qp->xrcd;
1851
1852 mutex_lock(&xrcd->tgt_qp_mutex);
1853 ib_close_qp(qp);
1854 if (atomic_read(&real_qp->usecnt) == 0)
1855 list_del(&real_qp->xrcd_list);
1856 else
1857 real_qp = NULL;
1858 mutex_unlock(&xrcd->tgt_qp_mutex);
1859
1860 if (real_qp) {
1861 ret = ib_destroy_qp(real_qp);
1862 if (!ret)
1863 atomic_dec(&xrcd->usecnt);
1864 else
1865 __ib_insert_xrcd_qp(xrcd, real_qp);
1866 }
1867
1868 return 0;
1869 }
1870
1871 int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata)
1872 {
1873 const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr;
1874 const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr;
1875 struct ib_pd *pd;
1876 struct ib_cq *scq, *rcq;
1877 struct ib_srq *srq;
1878 struct ib_rwq_ind_table *ind_tbl;
1879 struct ib_qp_security *sec;
1880 int ret;
1881
1882 WARN_ON_ONCE(qp->mrs_used > 0);
1883
1884 if (atomic_read(&qp->usecnt))
1885 return -EBUSY;
1886
1887 if (qp->real_qp != qp)
1888 return __ib_destroy_shared_qp(qp);
1889
1890 pd = qp->pd;
1891 scq = qp->send_cq;
1892 rcq = qp->recv_cq;
1893 srq = qp->srq;
1894 ind_tbl = qp->rwq_ind_tbl;
1895 sec = qp->qp_sec;
1896 if (sec)
1897 ib_destroy_qp_security_begin(sec);
1898
1899 if (!qp->uobject)
1900 rdma_rw_cleanup_mrs(qp);
1901
1902 rdma_counter_unbind_qp(qp, true);
1903 rdma_restrack_del(&qp->res);
1904 ret = qp->device->ops.destroy_qp(qp, udata);
1905 if (!ret) {
1906 if (alt_path_sgid_attr)
1907 rdma_put_gid_attr(alt_path_sgid_attr);
1908 if (av_sgid_attr)
1909 rdma_put_gid_attr(av_sgid_attr);
1910 if (pd)
1911 atomic_dec(&pd->usecnt);
1912 if (scq)
1913 atomic_dec(&scq->usecnt);
1914 if (rcq)
1915 atomic_dec(&rcq->usecnt);
1916 if (srq)
1917 atomic_dec(&srq->usecnt);
1918 if (ind_tbl)
1919 atomic_dec(&ind_tbl->usecnt);
1920 if (sec)
1921 ib_destroy_qp_security_end(sec);
1922 } else {
1923 if (sec)
1924 ib_destroy_qp_security_abort(sec);
1925 }
1926
1927 return ret;
1928 }
1929 EXPORT_SYMBOL(ib_destroy_qp_user);
1930
1931 /* Completion queues */
1932
1933 struct ib_cq *__ib_create_cq(struct ib_device *device,
1934 ib_comp_handler comp_handler,
1935 void (*event_handler)(struct ib_event *, void *),
1936 void *cq_context,
1937 const struct ib_cq_init_attr *cq_attr,
1938 const char *caller)
1939 {
1940 struct ib_cq *cq;
1941 int ret;
1942
1943 cq = rdma_zalloc_drv_obj(device, ib_cq);
1944 if (!cq)
1945 return ERR_PTR(-ENOMEM);
1946
1947 cq->device = device;
1948 cq->uobject = NULL;
1949 cq->comp_handler = comp_handler;
1950 cq->event_handler = event_handler;
1951 cq->cq_context = cq_context;
1952 atomic_set(&cq->usecnt, 0);
1953 cq->res.type = RDMA_RESTRACK_CQ;
1954 rdma_restrack_set_task(&cq->res, caller);
1955
1956 ret = device->ops.create_cq(cq, cq_attr, NULL);
1957 if (ret) {
1958 kfree(cq);
1959 return ERR_PTR(ret);
1960 }
1961
1962 rdma_restrack_kadd(&cq->res);
1963 return cq;
1964 }
1965 EXPORT_SYMBOL(__ib_create_cq);
1966
1967 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1968 {
1969 return cq->device->ops.modify_cq ?
1970 cq->device->ops.modify_cq(cq, cq_count,
1971 cq_period) : -EOPNOTSUPP;
1972 }
1973 EXPORT_SYMBOL(rdma_set_cq_moderation);
1974
1975 int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
1976 {
1977 if (atomic_read(&cq->usecnt))
1978 return -EBUSY;
1979
1980 rdma_restrack_del(&cq->res);
1981 cq->device->ops.destroy_cq(cq, udata);
1982 kfree(cq);
1983 return 0;
1984 }
1985 EXPORT_SYMBOL(ib_destroy_cq_user);
1986
1987 int ib_resize_cq(struct ib_cq *cq, int cqe)
1988 {
1989 return cq->device->ops.resize_cq ?
1990 cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
1991 }
1992 EXPORT_SYMBOL(ib_resize_cq);
1993
1994 /* Memory regions */
1995
1996 struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
1997 u64 virt_addr, int access_flags)
1998 {
1999 struct ib_mr *mr;
2000
2001 if (access_flags & IB_ACCESS_ON_DEMAND) {
2002 if (!(pd->device->attrs.device_cap_flags &
2003 IB_DEVICE_ON_DEMAND_PAGING)) {
2004 pr_debug("ODP support not available\n");
2005 return ERR_PTR(-EINVAL);
2006 }
2007 }
2008
2009 mr = pd->device->ops.reg_user_mr(pd, start, length, virt_addr,
2010 access_flags, NULL);
2011
2012 if (IS_ERR(mr))
2013 return mr;
2014
2015 mr->device = pd->device;
2016 mr->pd = pd;
2017 mr->dm = NULL;
2018 atomic_inc(&pd->usecnt);
2019 mr->res.type = RDMA_RESTRACK_MR;
2020 rdma_restrack_kadd(&mr->res);
2021
2022 return mr;
2023 }
2024 EXPORT_SYMBOL(ib_reg_user_mr);
2025
2026 int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,
2027 u32 flags, struct ib_sge *sg_list, u32 num_sge)
2028 {
2029 if (!pd->device->ops.advise_mr)
2030 return -EOPNOTSUPP;
2031
2032 return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge,
2033 NULL);
2034 }
2035 EXPORT_SYMBOL(ib_advise_mr);
2036
2037 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)
2038 {
2039 struct ib_pd *pd = mr->pd;
2040 struct ib_dm *dm = mr->dm;
2041 struct ib_sig_attrs *sig_attrs = mr->sig_attrs;
2042 int ret;
2043
2044 trace_mr_dereg(mr);
2045 rdma_restrack_del(&mr->res);
2046 ret = mr->device->ops.dereg_mr(mr, udata);
2047 if (!ret) {
2048 atomic_dec(&pd->usecnt);
2049 if (dm)
2050 atomic_dec(&dm->usecnt);
2051 kfree(sig_attrs);
2052 }
2053
2054 return ret;
2055 }
2056 EXPORT_SYMBOL(ib_dereg_mr_user);
2057
2058 /**
2059 * ib_alloc_mr_user() - Allocates a memory region
2060 * @pd: protection domain associated with the region
2061 * @mr_type: memory region type
2062 * @max_num_sg: maximum sg entries available for registration.
2063 * @udata: user data or null for kernel objects
2064 *
2065 * Notes:
2066 * Memory registeration page/sg lists must not exceed max_num_sg.
2067 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
2068 * max_num_sg * used_page_size.
2069 *
2070 */
2071 struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
2072 u32 max_num_sg, struct ib_udata *udata)
2073 {
2074 struct ib_mr *mr;
2075
2076 if (!pd->device->ops.alloc_mr) {
2077 mr = ERR_PTR(-EOPNOTSUPP);
2078 goto out;
2079 }
2080
2081 if (mr_type == IB_MR_TYPE_INTEGRITY) {
2082 WARN_ON_ONCE(1);
2083 mr = ERR_PTR(-EINVAL);
2084 goto out;
2085 }
2086
2087 mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, udata);
2088 if (!IS_ERR(mr)) {
2089 mr->device = pd->device;
2090 mr->pd = pd;
2091 mr->dm = NULL;
2092 mr->uobject = NULL;
2093 atomic_inc(&pd->usecnt);
2094 mr->need_inval = false;
2095 mr->res.type = RDMA_RESTRACK_MR;
2096 rdma_restrack_kadd(&mr->res);
2097 mr->type = mr_type;
2098 mr->sig_attrs = NULL;
2099 }
2100
2101 out:
2102 trace_mr_alloc(pd, mr_type, max_num_sg, mr);
2103 return mr;
2104 }
2105 EXPORT_SYMBOL(ib_alloc_mr_user);
2106
2107 /**
2108 * ib_alloc_mr_integrity() - Allocates an integrity memory region
2109 * @pd: protection domain associated with the region
2110 * @max_num_data_sg: maximum data sg entries available for registration
2111 * @max_num_meta_sg: maximum metadata sg entries available for
2112 * registration
2113 *
2114 * Notes:
2115 * Memory registration page/sg lists must not exceed max_num_sg,
2116 * also the integrity page/sg lists must not exceed max_num_meta_sg.
2117 *
2118 */
2119 struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
2120 u32 max_num_data_sg,
2121 u32 max_num_meta_sg)
2122 {
2123 struct ib_mr *mr;
2124 struct ib_sig_attrs *sig_attrs;
2125
2126 if (!pd->device->ops.alloc_mr_integrity ||
2127 !pd->device->ops.map_mr_sg_pi) {
2128 mr = ERR_PTR(-EOPNOTSUPP);
2129 goto out;
2130 }
2131
2132 if (!max_num_meta_sg) {
2133 mr = ERR_PTR(-EINVAL);
2134 goto out;
2135 }
2136
2137 sig_attrs = kzalloc(sizeof(struct ib_sig_attrs), GFP_KERNEL);
2138 if (!sig_attrs) {
2139 mr = ERR_PTR(-ENOMEM);
2140 goto out;
2141 }
2142
2143 mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,
2144 max_num_meta_sg);
2145 if (IS_ERR(mr)) {
2146 kfree(sig_attrs);
2147 goto out;
2148 }
2149
2150 mr->device = pd->device;
2151 mr->pd = pd;
2152 mr->dm = NULL;
2153 mr->uobject = NULL;
2154 atomic_inc(&pd->usecnt);
2155 mr->need_inval = false;
2156 mr->res.type = RDMA_RESTRACK_MR;
2157 rdma_restrack_kadd(&mr->res);
2158 mr->type = IB_MR_TYPE_INTEGRITY;
2159 mr->sig_attrs = sig_attrs;
2160
2161 out:
2162 trace_mr_integ_alloc(pd, max_num_data_sg, max_num_meta_sg, mr);
2163 return mr;
2164 }
2165 EXPORT_SYMBOL(ib_alloc_mr_integrity);
2166
2167 /* "Fast" memory regions */
2168
2169 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
2170 int mr_access_flags,
2171 struct ib_fmr_attr *fmr_attr)
2172 {
2173 struct ib_fmr *fmr;
2174
2175 if (!pd->device->ops.alloc_fmr)
2176 return ERR_PTR(-EOPNOTSUPP);
2177
2178 fmr = pd->device->ops.alloc_fmr(pd, mr_access_flags, fmr_attr);
2179 if (!IS_ERR(fmr)) {
2180 fmr->device = pd->device;
2181 fmr->pd = pd;
2182 atomic_inc(&pd->usecnt);
2183 }
2184
2185 return fmr;
2186 }
2187 EXPORT_SYMBOL(ib_alloc_fmr);
2188
2189 int ib_unmap_fmr(struct list_head *fmr_list)
2190 {
2191 struct ib_fmr *fmr;
2192
2193 if (list_empty(fmr_list))
2194 return 0;
2195
2196 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
2197 return fmr->device->ops.unmap_fmr(fmr_list);
2198 }
2199 EXPORT_SYMBOL(ib_unmap_fmr);
2200
2201 int ib_dealloc_fmr(struct ib_fmr *fmr)
2202 {
2203 struct ib_pd *pd;
2204 int ret;
2205
2206 pd = fmr->pd;
2207 ret = fmr->device->ops.dealloc_fmr(fmr);
2208 if (!ret)
2209 atomic_dec(&pd->usecnt);
2210
2211 return ret;
2212 }
2213 EXPORT_SYMBOL(ib_dealloc_fmr);
2214
2215 /* Multicast groups */
2216
2217 static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
2218 {
2219 struct ib_qp_init_attr init_attr = {};
2220 struct ib_qp_attr attr = {};
2221 int num_eth_ports = 0;
2222 int port;
2223
2224 /* If QP state >= init, it is assigned to a port and we can check this
2225 * port only.
2226 */
2227 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
2228 if (attr.qp_state >= IB_QPS_INIT) {
2229 if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
2230 IB_LINK_LAYER_INFINIBAND)
2231 return true;
2232 goto lid_check;
2233 }
2234 }
2235
2236 /* Can't get a quick answer, iterate over all ports */
2237 for (port = 0; port < qp->device->phys_port_cnt; port++)
2238 if (rdma_port_get_link_layer(qp->device, port) !=
2239 IB_LINK_LAYER_INFINIBAND)
2240 num_eth_ports++;
2241
2242 /* If we have at lease one Ethernet port, RoCE annex declares that
2243 * multicast LID should be ignored. We can't tell at this step if the
2244 * QP belongs to an IB or Ethernet port.
2245 */
2246 if (num_eth_ports)
2247 return true;
2248
2249 /* If all the ports are IB, we can check according to IB spec. */
2250 lid_check:
2251 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
2252 lid == be16_to_cpu(IB_LID_PERMISSIVE));
2253 }
2254
2255 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
2256 {
2257 int ret;
2258
2259 if (!qp->device->ops.attach_mcast)
2260 return -EOPNOTSUPP;
2261
2262 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
2263 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2264 return -EINVAL;
2265
2266 ret = qp->device->ops.attach_mcast(qp, gid, lid);
2267 if (!ret)
2268 atomic_inc(&qp->usecnt);
2269 return ret;
2270 }
2271 EXPORT_SYMBOL(ib_attach_mcast);
2272
2273 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
2274 {
2275 int ret;
2276
2277 if (!qp->device->ops.detach_mcast)
2278 return -EOPNOTSUPP;
2279
2280 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
2281 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2282 return -EINVAL;
2283
2284 ret = qp->device->ops.detach_mcast(qp, gid, lid);
2285 if (!ret)
2286 atomic_dec(&qp->usecnt);
2287 return ret;
2288 }
2289 EXPORT_SYMBOL(ib_detach_mcast);
2290
2291 struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller)
2292 {
2293 struct ib_xrcd *xrcd;
2294
2295 if (!device->ops.alloc_xrcd)
2296 return ERR_PTR(-EOPNOTSUPP);
2297
2298 xrcd = device->ops.alloc_xrcd(device, NULL);
2299 if (!IS_ERR(xrcd)) {
2300 xrcd->device = device;
2301 xrcd->inode = NULL;
2302 atomic_set(&xrcd->usecnt, 0);
2303 mutex_init(&xrcd->tgt_qp_mutex);
2304 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
2305 }
2306
2307 return xrcd;
2308 }
2309 EXPORT_SYMBOL(__ib_alloc_xrcd);
2310
2311 int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata)
2312 {
2313 struct ib_qp *qp;
2314 int ret;
2315
2316 if (atomic_read(&xrcd->usecnt))
2317 return -EBUSY;
2318
2319 while (!list_empty(&xrcd->tgt_qp_list)) {
2320 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
2321 ret = ib_destroy_qp(qp);
2322 if (ret)
2323 return ret;
2324 }
2325 mutex_destroy(&xrcd->tgt_qp_mutex);
2326
2327 return xrcd->device->ops.dealloc_xrcd(xrcd, udata);
2328 }
2329 EXPORT_SYMBOL(ib_dealloc_xrcd);
2330
2331 /**
2332 * ib_create_wq - Creates a WQ associated with the specified protection
2333 * domain.
2334 * @pd: The protection domain associated with the WQ.
2335 * @wq_attr: A list of initial attributes required to create the
2336 * WQ. If WQ creation succeeds, then the attributes are updated to
2337 * the actual capabilities of the created WQ.
2338 *
2339 * wq_attr->max_wr and wq_attr->max_sge determine
2340 * the requested size of the WQ, and set to the actual values allocated
2341 * on return.
2342 * If ib_create_wq() succeeds, then max_wr and max_sge will always be
2343 * at least as large as the requested values.
2344 */
2345 struct ib_wq *ib_create_wq(struct ib_pd *pd,
2346 struct ib_wq_init_attr *wq_attr)
2347 {
2348 struct ib_wq *wq;
2349
2350 if (!pd->device->ops.create_wq)
2351 return ERR_PTR(-EOPNOTSUPP);
2352
2353 wq = pd->device->ops.create_wq(pd, wq_attr, NULL);
2354 if (!IS_ERR(wq)) {
2355 wq->event_handler = wq_attr->event_handler;
2356 wq->wq_context = wq_attr->wq_context;
2357 wq->wq_type = wq_attr->wq_type;
2358 wq->cq = wq_attr->cq;
2359 wq->device = pd->device;
2360 wq->pd = pd;
2361 wq->uobject = NULL;
2362 atomic_inc(&pd->usecnt);
2363 atomic_inc(&wq_attr->cq->usecnt);
2364 atomic_set(&wq->usecnt, 0);
2365 }
2366 return wq;
2367 }
2368 EXPORT_SYMBOL(ib_create_wq);
2369
2370 /**
2371 * ib_destroy_wq - Destroys the specified user WQ.
2372 * @wq: The WQ to destroy.
2373 * @udata: Valid user data
2374 */
2375 int ib_destroy_wq(struct ib_wq *wq, struct ib_udata *udata)
2376 {
2377 struct ib_cq *cq = wq->cq;
2378 struct ib_pd *pd = wq->pd;
2379
2380 if (atomic_read(&wq->usecnt))
2381 return -EBUSY;
2382
2383 wq->device->ops.destroy_wq(wq, udata);
2384 atomic_dec(&pd->usecnt);
2385 atomic_dec(&cq->usecnt);
2386
2387 return 0;
2388 }
2389 EXPORT_SYMBOL(ib_destroy_wq);
2390
2391 /**
2392 * ib_modify_wq - Modifies the specified WQ.
2393 * @wq: The WQ to modify.
2394 * @wq_attr: On input, specifies the WQ attributes to modify.
2395 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
2396 * are being modified.
2397 * On output, the current values of selected WQ attributes are returned.
2398 */
2399 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
2400 u32 wq_attr_mask)
2401 {
2402 int err;
2403
2404 if (!wq->device->ops.modify_wq)
2405 return -EOPNOTSUPP;
2406
2407 err = wq->device->ops.modify_wq(wq, wq_attr, wq_attr_mask, NULL);
2408 return err;
2409 }
2410 EXPORT_SYMBOL(ib_modify_wq);
2411
2412 /*
2413 * ib_create_rwq_ind_table - Creates a RQ Indirection Table.
2414 * @device: The device on which to create the rwq indirection table.
2415 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to
2416 * create the Indirection Table.
2417 *
2418 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
2419 * than the created ib_rwq_ind_table object and the caller is responsible
2420 * for its memory allocation/free.
2421 */
2422 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
2423 struct ib_rwq_ind_table_init_attr *init_attr)
2424 {
2425 struct ib_rwq_ind_table *rwq_ind_table;
2426 int i;
2427 u32 table_size;
2428
2429 if (!device->ops.create_rwq_ind_table)
2430 return ERR_PTR(-EOPNOTSUPP);
2431
2432 table_size = (1 << init_attr->log_ind_tbl_size);
2433 rwq_ind_table = device->ops.create_rwq_ind_table(device,
2434 init_attr, NULL);
2435 if (IS_ERR(rwq_ind_table))
2436 return rwq_ind_table;
2437
2438 rwq_ind_table->ind_tbl = init_attr->ind_tbl;
2439 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size;
2440 rwq_ind_table->device = device;
2441 rwq_ind_table->uobject = NULL;
2442 atomic_set(&rwq_ind_table->usecnt, 0);
2443
2444 for (i = 0; i < table_size; i++)
2445 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt);
2446
2447 return rwq_ind_table;
2448 }
2449 EXPORT_SYMBOL(ib_create_rwq_ind_table);
2450
2451 /*
2452 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
2453 * @wq_ind_table: The Indirection Table to destroy.
2454 */
2455 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table)
2456 {
2457 int err, i;
2458 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size);
2459 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl;
2460
2461 if (atomic_read(&rwq_ind_table->usecnt))
2462 return -EBUSY;
2463
2464 err = rwq_ind_table->device->ops.destroy_rwq_ind_table(rwq_ind_table);
2465 if (!err) {
2466 for (i = 0; i < table_size; i++)
2467 atomic_dec(&ind_tbl[i]->usecnt);
2468 }
2469
2470 return err;
2471 }
2472 EXPORT_SYMBOL(ib_destroy_rwq_ind_table);
2473
2474 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
2475 struct ib_mr_status *mr_status)
2476 {
2477 if (!mr->device->ops.check_mr_status)
2478 return -EOPNOTSUPP;
2479
2480 return mr->device->ops.check_mr_status(mr, check_mask, mr_status);
2481 }
2482 EXPORT_SYMBOL(ib_check_mr_status);
2483
2484 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
2485 int state)
2486 {
2487 if (!device->ops.set_vf_link_state)
2488 return -EOPNOTSUPP;
2489
2490 return device->ops.set_vf_link_state(device, vf, port, state);
2491 }
2492 EXPORT_SYMBOL(ib_set_vf_link_state);
2493
2494 int ib_get_vf_config(struct ib_device *device, int vf, u8 port,
2495 struct ifla_vf_info *info)
2496 {
2497 if (!device->ops.get_vf_config)
2498 return -EOPNOTSUPP;
2499
2500 return device->ops.get_vf_config(device, vf, port, info);
2501 }
2502 EXPORT_SYMBOL(ib_get_vf_config);
2503
2504 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port,
2505 struct ifla_vf_stats *stats)
2506 {
2507 if (!device->ops.get_vf_stats)
2508 return -EOPNOTSUPP;
2509
2510 return device->ops.get_vf_stats(device, vf, port, stats);
2511 }
2512 EXPORT_SYMBOL(ib_get_vf_stats);
2513
2514 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
2515 int type)
2516 {
2517 if (!device->ops.set_vf_guid)
2518 return -EOPNOTSUPP;
2519
2520 return device->ops.set_vf_guid(device, vf, port, guid, type);
2521 }
2522 EXPORT_SYMBOL(ib_set_vf_guid);
2523
2524 int ib_get_vf_guid(struct ib_device *device, int vf, u8 port,
2525 struct ifla_vf_guid *node_guid,
2526 struct ifla_vf_guid *port_guid)
2527 {
2528 if (!device->ops.get_vf_guid)
2529 return -EOPNOTSUPP;
2530
2531 return device->ops.get_vf_guid(device, vf, port, node_guid, port_guid);
2532 }
2533 EXPORT_SYMBOL(ib_get_vf_guid);
2534 /**
2535 * ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection
2536 * information) and set an appropriate memory region for registration.
2537 * @mr: memory region
2538 * @data_sg: dma mapped scatterlist for data
2539 * @data_sg_nents: number of entries in data_sg
2540 * @data_sg_offset: offset in bytes into data_sg
2541 * @meta_sg: dma mapped scatterlist for metadata
2542 * @meta_sg_nents: number of entries in meta_sg
2543 * @meta_sg_offset: offset in bytes into meta_sg
2544 * @page_size: page vector desired page size
2545 *
2546 * Constraints:
2547 * - The MR must be allocated with type IB_MR_TYPE_INTEGRITY.
2548 *
2549 * Return: 0 on success.
2550 *
2551 * After this completes successfully, the memory region
2552 * is ready for registration.
2553 */
2554 int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg,
2555 int data_sg_nents, unsigned int *data_sg_offset,
2556 struct scatterlist *meta_sg, int meta_sg_nents,
2557 unsigned int *meta_sg_offset, unsigned int page_size)
2558 {
2559 if (unlikely(!mr->device->ops.map_mr_sg_pi ||
2560 WARN_ON_ONCE(mr->type != IB_MR_TYPE_INTEGRITY)))
2561 return -EOPNOTSUPP;
2562
2563 mr->page_size = page_size;
2564
2565 return mr->device->ops.map_mr_sg_pi(mr, data_sg, data_sg_nents,
2566 data_sg_offset, meta_sg,
2567 meta_sg_nents, meta_sg_offset);
2568 }
2569 EXPORT_SYMBOL(ib_map_mr_sg_pi);
2570
2571 /**
2572 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
2573 * and set it the memory region.
2574 * @mr: memory region
2575 * @sg: dma mapped scatterlist
2576 * @sg_nents: number of entries in sg
2577 * @sg_offset: offset in bytes into sg
2578 * @page_size: page vector desired page size
2579 *
2580 * Constraints:
2581 * - The first sg element is allowed to have an offset.
2582 * - Each sg element must either be aligned to page_size or virtually
2583 * contiguous to the previous element. In case an sg element has a
2584 * non-contiguous offset, the mapping prefix will not include it.
2585 * - The last sg element is allowed to have length less than page_size.
2586 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
2587 * then only max_num_sg entries will be mapped.
2588 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
2589 * constraints holds and the page_size argument is ignored.
2590 *
2591 * Returns the number of sg elements that were mapped to the memory region.
2592 *
2593 * After this completes successfully, the memory region
2594 * is ready for registration.
2595 */
2596 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
2597 unsigned int *sg_offset, unsigned int page_size)
2598 {
2599 if (unlikely(!mr->device->ops.map_mr_sg))
2600 return -EOPNOTSUPP;
2601
2602 mr->page_size = page_size;
2603
2604 return mr->device->ops.map_mr_sg(mr, sg, sg_nents, sg_offset);
2605 }
2606 EXPORT_SYMBOL(ib_map_mr_sg);
2607
2608 /**
2609 * ib_sg_to_pages() - Convert the largest prefix of a sg list
2610 * to a page vector
2611 * @mr: memory region
2612 * @sgl: dma mapped scatterlist
2613 * @sg_nents: number of entries in sg
2614 * @sg_offset_p: IN: start offset in bytes into sg
2615 * OUT: offset in bytes for element n of the sg of the first
2616 * byte that has not been processed where n is the return
2617 * value of this function.
2618 * @set_page: driver page assignment function pointer
2619 *
2620 * Core service helper for drivers to convert the largest
2621 * prefix of given sg list to a page vector. The sg list
2622 * prefix converted is the prefix that meet the requirements
2623 * of ib_map_mr_sg.
2624 *
2625 * Returns the number of sg elements that were assigned to
2626 * a page vector.
2627 */
2628 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
2629 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
2630 {
2631 struct scatterlist *sg;
2632 u64 last_end_dma_addr = 0;
2633 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
2634 unsigned int last_page_off = 0;
2635 u64 page_mask = ~((u64)mr->page_size - 1);
2636 int i, ret;
2637
2638 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
2639 return -EINVAL;
2640
2641 mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
2642 mr->length = 0;
2643
2644 for_each_sg(sgl, sg, sg_nents, i) {
2645 u64 dma_addr = sg_dma_address(sg) + sg_offset;
2646 u64 prev_addr = dma_addr;
2647 unsigned int dma_len = sg_dma_len(sg) - sg_offset;
2648 u64 end_dma_addr = dma_addr + dma_len;
2649 u64 page_addr = dma_addr & page_mask;
2650
2651 /*
2652 * For the second and later elements, check whether either the
2653 * end of element i-1 or the start of element i is not aligned
2654 * on a page boundary.
2655 */
2656 if (i && (last_page_off != 0 || page_addr != dma_addr)) {
2657 /* Stop mapping if there is a gap. */
2658 if (last_end_dma_addr != dma_addr)
2659 break;
2660
2661 /*
2662 * Coalesce this element with the last. If it is small
2663 * enough just update mr->length. Otherwise start
2664 * mapping from the next page.
2665 */
2666 goto next_page;
2667 }
2668
2669 do {
2670 ret = set_page(mr, page_addr);
2671 if (unlikely(ret < 0)) {
2672 sg_offset = prev_addr - sg_dma_address(sg);
2673 mr->length += prev_addr - dma_addr;
2674 if (sg_offset_p)
2675 *sg_offset_p = sg_offset;
2676 return i || sg_offset ? i : ret;
2677 }
2678 prev_addr = page_addr;
2679 next_page:
2680 page_addr += mr->page_size;
2681 } while (page_addr < end_dma_addr);
2682
2683 mr->length += dma_len;
2684 last_end_dma_addr = end_dma_addr;
2685 last_page_off = end_dma_addr & ~page_mask;
2686
2687 sg_offset = 0;
2688 }
2689
2690 if (sg_offset_p)
2691 *sg_offset_p = 0;
2692 return i;
2693 }
2694 EXPORT_SYMBOL(ib_sg_to_pages);
2695
2696 struct ib_drain_cqe {
2697 struct ib_cqe cqe;
2698 struct completion done;
2699 };
2700
2701 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
2702 {
2703 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
2704 cqe);
2705
2706 complete(&cqe->done);
2707 }
2708
2709 /*
2710 * Post a WR and block until its completion is reaped for the SQ.
2711 */
2712 static void __ib_drain_sq(struct ib_qp *qp)
2713 {
2714 struct ib_cq *cq = qp->send_cq;
2715 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2716 struct ib_drain_cqe sdrain;
2717 struct ib_rdma_wr swr = {
2718 .wr = {
2719 .next = NULL,
2720 { .wr_cqe = &sdrain.cqe, },
2721 .opcode = IB_WR_RDMA_WRITE,
2722 },
2723 };
2724 int ret;
2725
2726 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2727 if (ret) {
2728 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2729 return;
2730 }
2731
2732 sdrain.cqe.done = ib_drain_qp_done;
2733 init_completion(&sdrain.done);
2734
2735 ret = ib_post_send(qp, &swr.wr, NULL);
2736 if (ret) {
2737 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2738 return;
2739 }
2740
2741 if (cq->poll_ctx == IB_POLL_DIRECT)
2742 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)
2743 ib_process_cq_direct(cq, -1);
2744 else
2745 wait_for_completion(&sdrain.done);
2746 }
2747
2748 /*
2749 * Post a WR and block until its completion is reaped for the RQ.
2750 */
2751 static void __ib_drain_rq(struct ib_qp *qp)
2752 {
2753 struct ib_cq *cq = qp->recv_cq;
2754 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2755 struct ib_drain_cqe rdrain;
2756 struct ib_recv_wr rwr = {};
2757 int ret;
2758
2759 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2760 if (ret) {
2761 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2762 return;
2763 }
2764
2765 rwr.wr_cqe = &rdrain.cqe;
2766 rdrain.cqe.done = ib_drain_qp_done;
2767 init_completion(&rdrain.done);
2768
2769 ret = ib_post_recv(qp, &rwr, NULL);
2770 if (ret) {
2771 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2772 return;
2773 }
2774
2775 if (cq->poll_ctx == IB_POLL_DIRECT)
2776 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)
2777 ib_process_cq_direct(cq, -1);
2778 else
2779 wait_for_completion(&rdrain.done);
2780 }
2781
2782 /**
2783 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
2784 * application.
2785 * @qp: queue pair to drain
2786 *
2787 * If the device has a provider-specific drain function, then
2788 * call that. Otherwise call the generic drain function
2789 * __ib_drain_sq().
2790 *
2791 * The caller must:
2792 *
2793 * ensure there is room in the CQ and SQ for the drain work request and
2794 * completion.
2795 *
2796 * allocate the CQ using ib_alloc_cq().
2797 *
2798 * ensure that there are no other contexts that are posting WRs concurrently.
2799 * Otherwise the drain is not guaranteed.
2800 */
2801 void ib_drain_sq(struct ib_qp *qp)
2802 {
2803 if (qp->device->ops.drain_sq)
2804 qp->device->ops.drain_sq(qp);
2805 else
2806 __ib_drain_sq(qp);
2807 trace_cq_drain_complete(qp->send_cq);
2808 }
2809 EXPORT_SYMBOL(ib_drain_sq);
2810
2811 /**
2812 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
2813 * application.
2814 * @qp: queue pair to drain
2815 *
2816 * If the device has a provider-specific drain function, then
2817 * call that. Otherwise call the generic drain function
2818 * __ib_drain_rq().
2819 *
2820 * The caller must:
2821 *
2822 * ensure there is room in the CQ and RQ for the drain work request and
2823 * completion.
2824 *
2825 * allocate the CQ using ib_alloc_cq().
2826 *
2827 * ensure that there are no other contexts that are posting WRs concurrently.
2828 * Otherwise the drain is not guaranteed.
2829 */
2830 void ib_drain_rq(struct ib_qp *qp)
2831 {
2832 if (qp->device->ops.drain_rq)
2833 qp->device->ops.drain_rq(qp);
2834 else
2835 __ib_drain_rq(qp);
2836 trace_cq_drain_complete(qp->recv_cq);
2837 }
2838 EXPORT_SYMBOL(ib_drain_rq);
2839
2840 /**
2841 * ib_drain_qp() - Block until all CQEs have been consumed by the
2842 * application on both the RQ and SQ.
2843 * @qp: queue pair to drain
2844 *
2845 * The caller must:
2846 *
2847 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
2848 * and completions.
2849 *
2850 * allocate the CQs using ib_alloc_cq().
2851 *
2852 * ensure that there are no other contexts that are posting WRs concurrently.
2853 * Otherwise the drain is not guaranteed.
2854 */
2855 void ib_drain_qp(struct ib_qp *qp)
2856 {
2857 ib_drain_sq(qp);
2858 if (!qp->srq)
2859 ib_drain_rq(qp);
2860 }
2861 EXPORT_SYMBOL(ib_drain_qp);
2862
2863 struct net_device *rdma_alloc_netdev(struct ib_device *device, u8 port_num,
2864 enum rdma_netdev_t type, const char *name,
2865 unsigned char name_assign_type,
2866 void (*setup)(struct net_device *))
2867 {
2868 struct rdma_netdev_alloc_params params;
2869 struct net_device *netdev;
2870 int rc;
2871
2872 if (!device->ops.rdma_netdev_get_params)
2873 return ERR_PTR(-EOPNOTSUPP);
2874
2875 rc = device->ops.rdma_netdev_get_params(device, port_num, type,
2876 &params);
2877 if (rc)
2878 return ERR_PTR(rc);
2879
2880 netdev = alloc_netdev_mqs(params.sizeof_priv, name, name_assign_type,
2881 setup, params.txqs, params.rxqs);
2882 if (!netdev)
2883 return ERR_PTR(-ENOMEM);
2884
2885 return netdev;
2886 }
2887 EXPORT_SYMBOL(rdma_alloc_netdev);
2888
2889 int rdma_init_netdev(struct ib_device *device, u8 port_num,
2890 enum rdma_netdev_t type, const char *name,
2891 unsigned char name_assign_type,
2892 void (*setup)(struct net_device *),
2893 struct net_device *netdev)
2894 {
2895 struct rdma_netdev_alloc_params params;
2896 int rc;
2897
2898 if (!device->ops.rdma_netdev_get_params)
2899 return -EOPNOTSUPP;
2900
2901 rc = device->ops.rdma_netdev_get_params(device, port_num, type,
2902 &params);
2903 if (rc)
2904 return rc;
2905
2906 return params.initialize_rdma_netdev(device, port_num,
2907 netdev, params.param);
2908 }
2909 EXPORT_SYMBOL(rdma_init_netdev);
2910
2911 void __rdma_block_iter_start(struct ib_block_iter *biter,
2912 struct scatterlist *sglist, unsigned int nents,
2913 unsigned long pgsz)
2914 {
2915 memset(biter, 0, sizeof(struct ib_block_iter));
2916 biter->__sg = sglist;
2917 biter->__sg_nents = nents;
2918
2919 /* Driver provides best block size to use */
2920 biter->__pg_bit = __fls(pgsz);
2921 }
2922 EXPORT_SYMBOL(__rdma_block_iter_start);
2923
2924 bool __rdma_block_iter_next(struct ib_block_iter *biter)
2925 {
2926 unsigned int block_offset;
2927
2928 if (!biter->__sg_nents || !biter->__sg)
2929 return false;
2930
2931 biter->__dma_addr = sg_dma_address(biter->__sg) + biter->__sg_advance;
2932 block_offset = biter->__dma_addr & (BIT_ULL(biter->__pg_bit) - 1);
2933 biter->__sg_advance += BIT_ULL(biter->__pg_bit) - block_offset;
2934
2935 if (biter->__sg_advance >= sg_dma_len(biter->__sg)) {
2936 biter->__sg_advance = 0;
2937 biter->__sg = sg_next(biter->__sg);
2938 biter->__sg_nents--;
2939 }
2940
2941 return true;
2942 }
2943 EXPORT_SYMBOL(__rdma_block_iter_next);
Linux with added FPC-III support