1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
5 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
6 * Copyright (c) 2004 Intel Corporation. All rights reserved.
7 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
8 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
9 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
10 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
11 *
12 * This software is available to you under a choice of one of two
13 * licenses. You may choose to be licensed under the terms of the GNU
14 * General Public License (GPL) Version 2, available from the file
15 * COPYING in the main directory of this source tree, or the
16 * OpenIB.org BSD license below:
17 *
18 * Redistribution and use in source and binary forms, with or
19 * without modification, are permitted provided that the following
20 * conditions are met:
21 *
22 * - Redistributions of source code must retain the above
23 * copyright notice, this list of conditions and the following
24 * disclaimer.
25 *
26 * - Redistributions in binary form must reproduce the above
27 * copyright notice, this list of conditions and the following
28 * disclaimer in the documentation and/or other materials
29 * provided with the distribution.
30 *
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
35 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
36 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
37 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
38 * SOFTWARE.
39 */
40
41 #include <sys/cdefs.h>
42 #include <linux/errno.h>
43 #include <linux/err.h>
44 #include <linux/string.h>
45 #include <linux/slab.h>
46 #include <linux/in.h>
47 #include <linux/in6.h>
48 #include <linux/wait.h>
49
50 #include <rdma/ib_verbs.h>
51 #include <rdma/ib_cache.h>
52 #include <rdma/ib_addr.h>
53
54 #include <netinet/ip.h>
55 #include <netinet/ip6.h>
56
57 #include <machine/in_cksum.h>
58
59 #include "core_priv.h"
60
61 static int ib_resolve_eth_dmac(struct ib_device *device,
62 struct rdma_ah_attr *ah_attr);
63
64 static const char * const ib_events[] = {
65 [IB_EVENT_CQ_ERR] = "CQ error",
66 [IB_EVENT_QP_FATAL] = "QP fatal error",
67 [IB_EVENT_QP_REQ_ERR] = "QP request error",
68 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
69 [IB_EVENT_COMM_EST] = "communication established",
70 [IB_EVENT_SQ_DRAINED] = "send queue drained",
71 [IB_EVENT_PATH_MIG] = "path migration successful",
72 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
73 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
74 [IB_EVENT_PORT_ACTIVE] = "port active",
75 [IB_EVENT_PORT_ERR] = "port error",
76 [IB_EVENT_LID_CHANGE] = "LID change",
77 [IB_EVENT_PKEY_CHANGE] = "P_key change",
78 [IB_EVENT_SM_CHANGE] = "SM change",
79 [IB_EVENT_SRQ_ERR] = "SRQ error",
80 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
81 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
82 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
83 [IB_EVENT_GID_CHANGE] = "GID changed",
84 };
85
ib_event_msg(enum ib_event_type event)86 const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
87 {
88 size_t index = event;
89
90 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
91 ib_events[index] : "unrecognized event";
92 }
93 EXPORT_SYMBOL(ib_event_msg);
94
95 static const char * const wc_statuses[] = {
96 [IB_WC_SUCCESS] = "success",
97 [IB_WC_LOC_LEN_ERR] = "local length error",
98 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
99 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
100 [IB_WC_LOC_PROT_ERR] = "local protection error",
101 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
102 [IB_WC_MW_BIND_ERR] = "memory management operation error",
103 [IB_WC_BAD_RESP_ERR] = "bad response error",
104 [IB_WC_LOC_ACCESS_ERR] = "local access error",
105 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
106 [IB_WC_REM_ACCESS_ERR] = "remote access error",
107 [IB_WC_REM_OP_ERR] = "remote operation error",
108 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
109 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
110 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
111 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
112 [IB_WC_REM_ABORT_ERR] = "operation aborted",
113 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
114 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
115 [IB_WC_FATAL_ERR] = "fatal error",
116 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
117 [IB_WC_GENERAL_ERR] = "general error",
118 };
119
ib_wc_status_msg(enum ib_wc_status status)120 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
121 {
122 size_t index = status;
123
124 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
125 wc_statuses[index] : "unrecognized status";
126 }
127 EXPORT_SYMBOL(ib_wc_status_msg);
128
ib_rate_to_mult(enum ib_rate rate)129 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
130 {
131 switch (rate) {
132 case IB_RATE_2_5_GBPS: return 1;
133 case IB_RATE_5_GBPS: return 2;
134 case IB_RATE_10_GBPS: return 4;
135 case IB_RATE_20_GBPS: return 8;
136 case IB_RATE_30_GBPS: return 12;
137 case IB_RATE_40_GBPS: return 16;
138 case IB_RATE_60_GBPS: return 24;
139 case IB_RATE_80_GBPS: return 32;
140 case IB_RATE_120_GBPS: return 48;
141 case IB_RATE_14_GBPS: return 6;
142 case IB_RATE_56_GBPS: return 22;
143 case IB_RATE_112_GBPS: return 45;
144 case IB_RATE_168_GBPS: return 67;
145 case IB_RATE_25_GBPS: return 10;
146 case IB_RATE_100_GBPS: return 40;
147 case IB_RATE_200_GBPS: return 80;
148 case IB_RATE_300_GBPS: return 120;
149 case IB_RATE_28_GBPS: return 11;
150 case IB_RATE_50_GBPS: return 20;
151 case IB_RATE_400_GBPS: return 160;
152 case IB_RATE_600_GBPS: return 240;
153 default: return -1;
154 }
155 }
156 EXPORT_SYMBOL(ib_rate_to_mult);
157
mult_to_ib_rate(int mult)158 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
159 {
160 switch (mult) {
161 case 1: return IB_RATE_2_5_GBPS;
162 case 2: return IB_RATE_5_GBPS;
163 case 4: return IB_RATE_10_GBPS;
164 case 8: return IB_RATE_20_GBPS;
165 case 12: return IB_RATE_30_GBPS;
166 case 16: return IB_RATE_40_GBPS;
167 case 24: return IB_RATE_60_GBPS;
168 case 32: return IB_RATE_80_GBPS;
169 case 48: return IB_RATE_120_GBPS;
170 case 6: return IB_RATE_14_GBPS;
171 case 22: return IB_RATE_56_GBPS;
172 case 45: return IB_RATE_112_GBPS;
173 case 67: return IB_RATE_168_GBPS;
174 case 10: return IB_RATE_25_GBPS;
175 case 40: return IB_RATE_100_GBPS;
176 case 80: return IB_RATE_200_GBPS;
177 case 120: return IB_RATE_300_GBPS;
178 case 11: return IB_RATE_28_GBPS;
179 case 20: return IB_RATE_50_GBPS;
180 case 160: return IB_RATE_400_GBPS;
181 case 240: return IB_RATE_600_GBPS;
182 default: return IB_RATE_PORT_CURRENT;
183 }
184 }
185 EXPORT_SYMBOL(mult_to_ib_rate);
186
ib_rate_to_mbps(enum ib_rate rate)187 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
188 {
189 switch (rate) {
190 case IB_RATE_2_5_GBPS: return 2500;
191 case IB_RATE_5_GBPS: return 5000;
192 case IB_RATE_10_GBPS: return 10000;
193 case IB_RATE_20_GBPS: return 20000;
194 case IB_RATE_30_GBPS: return 30000;
195 case IB_RATE_40_GBPS: return 40000;
196 case IB_RATE_60_GBPS: return 60000;
197 case IB_RATE_80_GBPS: return 80000;
198 case IB_RATE_120_GBPS: return 120000;
199 case IB_RATE_14_GBPS: return 14062;
200 case IB_RATE_56_GBPS: return 56250;
201 case IB_RATE_112_GBPS: return 112500;
202 case IB_RATE_168_GBPS: return 168750;
203 case IB_RATE_25_GBPS: return 25781;
204 case IB_RATE_100_GBPS: return 103125;
205 case IB_RATE_200_GBPS: return 206250;
206 case IB_RATE_300_GBPS: return 309375;
207 case IB_RATE_28_GBPS: return 28125;
208 case IB_RATE_50_GBPS: return 53125;
209 case IB_RATE_400_GBPS: return 425000;
210 case IB_RATE_600_GBPS: return 637500;
211 default: return -1;
212 }
213 }
214 EXPORT_SYMBOL(ib_rate_to_mbps);
215
216 __attribute_const__ enum rdma_transport_type
rdma_node_get_transport(enum rdma_node_type node_type)217 rdma_node_get_transport(enum rdma_node_type node_type)
218 {
219 switch (node_type) {
220 case RDMA_NODE_IB_CA:
221 case RDMA_NODE_IB_SWITCH:
222 case RDMA_NODE_IB_ROUTER:
223 return RDMA_TRANSPORT_IB;
224 case RDMA_NODE_RNIC:
225 return RDMA_TRANSPORT_IWARP;
226 case RDMA_NODE_USNIC:
227 return RDMA_TRANSPORT_USNIC;
228 case RDMA_NODE_USNIC_UDP:
229 return RDMA_TRANSPORT_USNIC_UDP;
230 default:
231 BUG();
232 return 0;
233 }
234 }
235 EXPORT_SYMBOL(rdma_node_get_transport);
236
rdma_port_get_link_layer(struct ib_device * device,u8 port_num)237 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
238 {
239 if (device->get_link_layer)
240 return device->get_link_layer(device, port_num);
241
242 switch (rdma_node_get_transport(device->node_type)) {
243 case RDMA_TRANSPORT_IB:
244 return IB_LINK_LAYER_INFINIBAND;
245 case RDMA_TRANSPORT_IWARP:
246 case RDMA_TRANSPORT_USNIC:
247 case RDMA_TRANSPORT_USNIC_UDP:
248 return IB_LINK_LAYER_ETHERNET;
249 default:
250 return IB_LINK_LAYER_UNSPECIFIED;
251 }
252 }
253 EXPORT_SYMBOL(rdma_port_get_link_layer);
254
255 /* Protection domains */
256
257 /**
258 * ib_alloc_pd - Allocates an unused protection domain.
259 * @device: The device on which to allocate the protection domain.
260 *
261 * A protection domain object provides an association between QPs, shared
262 * receive queues, address handles, memory regions, and memory windows.
263 *
264 * Every PD has a local_dma_lkey which can be used as the lkey value for local
265 * memory operations.
266 */
__ib_alloc_pd(struct ib_device * device,unsigned int flags,const char * caller)267 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
268 const char *caller)
269 {
270 struct ib_pd *pd;
271 int mr_access_flags = 0;
272 int ret;
273
274 pd = rdma_zalloc_drv_obj(device, ib_pd);
275 if (!pd)
276 return ERR_PTR(-ENOMEM);
277
278 pd->device = device;
279 pd->uobject = NULL;
280 pd->__internal_mr = NULL;
281 atomic_set(&pd->usecnt, 0);
282 pd->flags = flags;
283
284 ret = device->alloc_pd(pd, NULL);
285 if (ret) {
286 kfree(pd);
287 return ERR_PTR(ret);
288 }
289
290 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
291 pd->local_dma_lkey = device->local_dma_lkey;
292 else
293 mr_access_flags |= IB_ACCESS_LOCAL_WRITE;
294
295 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
296 pr_warn("%s: enabling unsafe global rkey\n", caller);
297 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
298 }
299
300 if (mr_access_flags) {
301 struct ib_mr *mr;
302
303 mr = pd->device->get_dma_mr(pd, mr_access_flags);
304 if (IS_ERR(mr)) {
305 ib_dealloc_pd(pd);
306 return ERR_CAST(mr);
307 }
308
309 mr->device = pd->device;
310 mr->pd = pd;
311 mr->type = IB_MR_TYPE_DMA;
312 mr->uobject = NULL;
313 mr->need_inval = false;
314
315 pd->__internal_mr = mr;
316
317 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY))
318 pd->local_dma_lkey = pd->__internal_mr->lkey;
319
320 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
321 pd->unsafe_global_rkey = pd->__internal_mr->rkey;
322 }
323
324 return pd;
325 }
326 EXPORT_SYMBOL(__ib_alloc_pd);
327
328 /**
329 * ib_dealloc_pd_user - Deallocates a protection domain.
330 * @pd: The protection domain to deallocate.
331 * @udata: Valid user data or NULL for kernel object
332 *
333 * It is an error to call this function while any resources in the pd still
334 * exist. The caller is responsible to synchronously destroy them and
335 * guarantee no new allocations will happen.
336 */
ib_dealloc_pd_user(struct ib_pd * pd,struct ib_udata * udata)337 void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata)
338 {
339 int ret;
340
341 if (pd->__internal_mr) {
342 ret = pd->device->dereg_mr(pd->__internal_mr, NULL);
343 WARN_ON(ret);
344 pd->__internal_mr = NULL;
345 }
346
347 /* uverbs manipulates usecnt with proper locking, while the kabi
348 requires the caller to guarantee we can't race here. */
349 WARN_ON(atomic_read(&pd->usecnt));
350
351 pd->device->dealloc_pd(pd, udata);
352 kfree(pd);
353 }
354 EXPORT_SYMBOL(ib_dealloc_pd_user);
355
356 /* Address handles */
357
358 /**
359 * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination.
360 * @dest: Pointer to destination ah_attr. Contents of the destination
361 * pointer is assumed to be invalid and attribute are overwritten.
362 * @src: Pointer to source ah_attr.
363 */
rdma_copy_ah_attr(struct rdma_ah_attr * dest,const struct rdma_ah_attr * src)364 void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
365 const struct rdma_ah_attr *src)
366 {
367 *dest = *src;
368 if (dest->grh.sgid_attr)
369 rdma_hold_gid_attr(dest->grh.sgid_attr);
370 }
371 EXPORT_SYMBOL(rdma_copy_ah_attr);
372
373 /**
374 * rdma_replace_ah_attr - Replace valid ah_attr with new new one.
375 * @old: Pointer to existing ah_attr which needs to be replaced.
376 * old is assumed to be valid or zero'd
377 * @new: Pointer to the new ah_attr.
378 *
379 * rdma_replace_ah_attr() first releases any reference in the old ah_attr if
380 * old the ah_attr is valid; after that it copies the new attribute and holds
381 * the reference to the replaced ah_attr.
382 */
rdma_replace_ah_attr(struct rdma_ah_attr * old,const struct rdma_ah_attr * new)383 void rdma_replace_ah_attr(struct rdma_ah_attr *old,
384 const struct rdma_ah_attr *new)
385 {
386 rdma_destroy_ah_attr(old);
387 *old = *new;
388 if (old->grh.sgid_attr)
389 rdma_hold_gid_attr(old->grh.sgid_attr);
390 }
391 EXPORT_SYMBOL(rdma_replace_ah_attr);
392
393 /**
394 * rdma_move_ah_attr - Move ah_attr pointed by source to destination.
395 * @dest: Pointer to destination ah_attr to copy to.
396 * dest is assumed to be valid or zero'd
397 * @src: Pointer to the new ah_attr.
398 *
399 * rdma_move_ah_attr() first releases any reference in the destination ah_attr
400 * if it is valid. This also transfers ownership of internal references from
401 * src to dest, making src invalid in the process. No new reference of the src
402 * ah_attr is taken.
403 */
rdma_move_ah_attr(struct rdma_ah_attr * dest,struct rdma_ah_attr * src)404 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src)
405 {
406 rdma_destroy_ah_attr(dest);
407 *dest = *src;
408 src->grh.sgid_attr = NULL;
409 }
410 EXPORT_SYMBOL(rdma_move_ah_attr);
411
412 /*
413 * Validate that the rdma_ah_attr is valid for the device before passing it
414 * off to the driver.
415 */
rdma_check_ah_attr(struct ib_device * device,struct rdma_ah_attr * ah_attr)416 static int rdma_check_ah_attr(struct ib_device *device,
417 struct rdma_ah_attr *ah_attr)
418 {
419 if (!rdma_is_port_valid(device, ah_attr->port_num))
420 return -EINVAL;
421
422 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE &&
423 !(ah_attr->ah_flags & IB_AH_GRH))
424 return -EINVAL;
425
426 if (ah_attr->grh.sgid_attr) {
427 /*
428 * Make sure the passed sgid_attr is consistent with the
429 * parameters
430 */
431 if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index ||
432 ah_attr->grh.sgid_attr->port_num != ah_attr->port_num)
433 return -EINVAL;
434 }
435 return 0;
436 }
437
438 /*
439 * If the ah requires a GRH then ensure that sgid_attr pointer is filled in.
440 * On success the caller is responsible to call rdma_unfill_sgid_attr().
441 */
rdma_fill_sgid_attr(struct ib_device * device,struct rdma_ah_attr * ah_attr,const struct ib_gid_attr ** old_sgid_attr)442 static int rdma_fill_sgid_attr(struct ib_device *device,
443 struct rdma_ah_attr *ah_attr,
444 const struct ib_gid_attr **old_sgid_attr)
445 {
446 const struct ib_gid_attr *sgid_attr;
447 struct ib_global_route *grh;
448 int ret;
449
450 *old_sgid_attr = ah_attr->grh.sgid_attr;
451
452 ret = rdma_check_ah_attr(device, ah_attr);
453 if (ret)
454 return ret;
455
456 if (!(ah_attr->ah_flags & IB_AH_GRH))
457 return 0;
458
459 grh = rdma_ah_retrieve_grh(ah_attr);
460 if (grh->sgid_attr)
461 return 0;
462
463 sgid_attr =
464 rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index);
465 if (IS_ERR(sgid_attr))
466 return PTR_ERR(sgid_attr);
467
468 /* Move ownerhip of the kref into the ah_attr */
469 grh->sgid_attr = sgid_attr;
470 return 0;
471 }
472
rdma_unfill_sgid_attr(struct rdma_ah_attr * ah_attr,const struct ib_gid_attr * old_sgid_attr)473 static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr,
474 const struct ib_gid_attr *old_sgid_attr)
475 {
476 /*
477 * Fill didn't change anything, the caller retains ownership of
478 * whatever it passed
479 */
480 if (ah_attr->grh.sgid_attr == old_sgid_attr)
481 return;
482
483 /*
484 * Otherwise, we need to undo what rdma_fill_sgid_attr so the caller
485 * doesn't see any change in the rdma_ah_attr. If we get here
486 * old_sgid_attr is NULL.
487 */
488 rdma_destroy_ah_attr(ah_attr);
489 }
490
491 static const struct ib_gid_attr *
rdma_update_sgid_attr(struct rdma_ah_attr * ah_attr,const struct ib_gid_attr * old_attr)492 rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr,
493 const struct ib_gid_attr *old_attr)
494 {
495 if (old_attr)
496 rdma_put_gid_attr(old_attr);
497 if (ah_attr->ah_flags & IB_AH_GRH) {
498 rdma_hold_gid_attr(ah_attr->grh.sgid_attr);
499 return ah_attr->grh.sgid_attr;
500 }
501 return NULL;
502 }
503
_rdma_create_ah(struct ib_pd * pd,struct rdma_ah_attr * ah_attr,u32 flags,struct ib_udata * udata)504 static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
505 struct rdma_ah_attr *ah_attr,
506 u32 flags,
507 struct ib_udata *udata)
508 {
509 struct ib_device *device = pd->device;
510 struct ib_ah *ah;
511 int ret;
512
513 might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE);
514
515 if (!device->create_ah)
516 return ERR_PTR(-EOPNOTSUPP);
517
518 ah = rdma_zalloc_drv_obj_gfp(
519 device, ib_ah,
520 (flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC);
521 if (!ah)
522 return ERR_PTR(-ENOMEM);
523
524 ah->device = device;
525 ah->pd = pd;
526 ah->type = ah_attr->type;
527 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL);
528
529 ret = device->create_ah(ah, ah_attr, flags, udata);
530 if (ret) {
531 kfree(ah);
532 return ERR_PTR(ret);
533 }
534
535 atomic_inc(&pd->usecnt);
536 return ah;
537 }
538
539 /**
540 * rdma_create_ah - Creates an address handle for the
541 * given address vector.
542 * @pd: The protection domain associated with the address handle.
543 * @ah_attr: The attributes of the address vector.
544 * @flags: Create address handle flags (see enum rdma_create_ah_flags).
545 *
546 * It returns 0 on success and returns appropriate error code on error.
547 * The address handle is used to reference a local or global destination
548 * in all UD QP post sends.
549 */
rdma_create_ah(struct ib_pd * pd,struct rdma_ah_attr * ah_attr,u32 flags)550 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
551 u32 flags)
552 {
553 const struct ib_gid_attr *old_sgid_attr;
554 struct ib_ah *ah;
555 int ret;
556
557 ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
558 if (ret)
559 return ERR_PTR(ret);
560
561 ah = _rdma_create_ah(pd, ah_attr, flags, NULL);
562
563 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
564 return ah;
565 }
566 EXPORT_SYMBOL(rdma_create_ah);
567
568 /**
569 * rdma_create_user_ah - Creates an address handle for the
570 * given address vector.
571 * It resolves destination mac address for ah attribute of RoCE type.
572 * @pd: The protection domain associated with the address handle.
573 * @ah_attr: The attributes of the address vector.
574 * @udata: pointer to user's input output buffer information need by
575 * provider driver.
576 *
577 * It returns a valid address handle pointer on success and
578 * returns appropriate error code on error.
579 * The address handle is used to reference a local or global destination
580 * in all UD QP post sends.
581 */
rdma_create_user_ah(struct ib_pd * pd,struct rdma_ah_attr * ah_attr,struct ib_udata * udata)582 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
583 struct rdma_ah_attr *ah_attr,
584 struct ib_udata *udata)
585 {
586 const struct ib_gid_attr *old_sgid_attr;
587 struct ib_ah *ah;
588 int err;
589
590 err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
591 if (err)
592 return ERR_PTR(err);
593
594 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
595 err = ib_resolve_eth_dmac(pd->device, ah_attr);
596 if (err) {
597 ah = ERR_PTR(err);
598 goto out;
599 }
600 }
601
602 ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE, udata);
603
604 out:
605 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
606 return ah;
607 }
608 EXPORT_SYMBOL(ib_create_user_ah);
609
ib_get_rdma_header_version(const union rdma_network_hdr * hdr)610 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)
611 {
612 const struct ip *ip4h = (const struct ip *)&hdr->roce4grh;
613 struct ip ip4h_checked;
614 const struct ip6_hdr *ip6h = (const struct ip6_hdr *)&hdr->ibgrh;
615
616 /* If it's IPv6, the version must be 6, otherwise, the first
617 * 20 bytes (before the IPv4 header) are garbled.
618 */
619 if ((ip6h->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
620 return (ip4h->ip_v == 4) ? 4 : 0;
621 /* version may be 6 or 4 because the first 20 bytes could be garbled */
622
623 /* RoCE v2 requires no options, thus header length
624 * must be 5 words
625 */
626 if (ip4h->ip_hl != 5)
627 return 6;
628
629 /* Verify checksum.
630 * We can't write on scattered buffers so we need to copy to
631 * temp buffer.
632 */
633 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
634 ip4h_checked.ip_sum = 0;
635 #if defined(INET) || defined(INET6)
636 ip4h_checked.ip_sum = in_cksum_hdr(&ip4h_checked);
637 #endif
638 /* if IPv4 header checksum is OK, believe it */
639 if (ip4h->ip_sum == ip4h_checked.ip_sum)
640 return 4;
641 return 6;
642 }
643 EXPORT_SYMBOL(ib_get_rdma_header_version);
644
ib_get_net_type_by_grh(struct ib_device * device,u8 port_num,const struct ib_grh * grh)645 static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
646 u8 port_num,
647 const struct ib_grh *grh)
648 {
649 int grh_version;
650
651 if (rdma_protocol_ib(device, port_num))
652 return RDMA_NETWORK_IB;
653
654 grh_version = ib_get_rdma_header_version((const union rdma_network_hdr *)grh);
655
656 if (grh_version == 4)
657 return RDMA_NETWORK_IPV4;
658
659 if (grh->next_hdr == IPPROTO_UDP)
660 return RDMA_NETWORK_IPV6;
661
662 return RDMA_NETWORK_ROCE_V1;
663 }
664
665 struct find_gid_index_context {
666 u16 vlan_id;
667 enum ib_gid_type gid_type;
668 };
669
670
671 /*
672 * This function will return true only if a inspected GID index
673 * matches the request based on the GID type and VLAN configuration
674 */
find_gid_index(const union ib_gid * gid,const struct ib_gid_attr * gid_attr,void * context)675 static bool find_gid_index(const union ib_gid *gid,
676 const struct ib_gid_attr *gid_attr,
677 void *context)
678 {
679 u16 vlan_diff;
680 struct find_gid_index_context *ctx = context;
681
682 if (ctx->gid_type != gid_attr->gid_type)
683 return false;
684
685 /*
686 * The following will verify:
687 * 1. VLAN ID matching for VLAN tagged requests.
688 * 2. prio-tagged/untagged to prio-tagged/untagged matching.
689 *
690 * This XOR is valid, since 0x0 < vlan_id < 0x0FFF.
691 */
692 vlan_diff = rdma_vlan_dev_vlan_id(gid_attr->ndev) ^ ctx->vlan_id;
693
694 return (vlan_diff == 0x0000 || vlan_diff == 0xFFFF);
695 }
696
697 static const struct ib_gid_attr *
get_sgid_attr_from_eth(struct ib_device * device,u8 port_num,u16 vlan_id,const union ib_gid * sgid,enum ib_gid_type gid_type)698 get_sgid_attr_from_eth(struct ib_device *device, u8 port_num,
699 u16 vlan_id, const union ib_gid *sgid,
700 enum ib_gid_type gid_type)
701 {
702 struct find_gid_index_context context = {.vlan_id = vlan_id,
703 .gid_type = gid_type};
704
705 return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index,
706 &context);
707 }
708
ib_get_gids_from_rdma_hdr(const union rdma_network_hdr * hdr,enum rdma_network_type net_type,union ib_gid * sgid,union ib_gid * dgid)709 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
710 enum rdma_network_type net_type,
711 union ib_gid *sgid, union ib_gid *dgid)
712 {
713 struct sockaddr_in src_in;
714 struct sockaddr_in dst_in;
715 __be32 src_saddr, dst_saddr;
716
717 if (!sgid || !dgid)
718 return -EINVAL;
719
720 if (net_type == RDMA_NETWORK_IPV4) {
721 memcpy(&src_in.sin_addr.s_addr,
722 &hdr->roce4grh.ip_src, 4);
723 memcpy(&dst_in.sin_addr.s_addr,
724 &hdr->roce4grh.ip_dst, 4);
725 src_saddr = src_in.sin_addr.s_addr;
726 dst_saddr = dst_in.sin_addr.s_addr;
727 ipv6_addr_set_v4mapped(src_saddr,
728 (struct in6_addr *)sgid);
729 ipv6_addr_set_v4mapped(dst_saddr,
730 (struct in6_addr *)dgid);
731 return 0;
732 } else if (net_type == RDMA_NETWORK_IPV6 ||
733 net_type == RDMA_NETWORK_IB) {
734 *dgid = hdr->ibgrh.dgid;
735 *sgid = hdr->ibgrh.sgid;
736 return 0;
737 } else {
738 return -EINVAL;
739 }
740 }
741 EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
742
743 /* Resolve destination mac address and hop limit for unicast destination
744 * GID entry, considering the source GID entry as well.
745 * ah_attribute must have have valid port_num, sgid_index.
746 */
ib_resolve_unicast_gid_dmac(struct ib_device * device,struct rdma_ah_attr * ah_attr)747 static int ib_resolve_unicast_gid_dmac(struct ib_device *device,
748 struct rdma_ah_attr *ah_attr)
749 {
750 struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
751 const struct ib_gid_attr *sgid_attr = grh->sgid_attr;
752 int hop_limit = 0xff;
753 int ret = 0;
754
755 /* If destination is link local and source GID is RoCEv1,
756 * IP stack is not used.
757 */
758 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) &&
759 sgid_attr->gid_type == IB_GID_TYPE_ROCE) {
760 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
761 ah_attr->roce.dmac);
762 return ret;
763 }
764
765 ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid,
766 ah_attr->roce.dmac,
767 sgid_attr, &hop_limit);
768
769 grh->hop_limit = hop_limit;
770 return ret;
771 }
772
773 /*
774 * This function initializes address handle attributes from the incoming packet.
775 * Incoming packet has dgid of the receiver node on which this code is
776 * getting executed and, sgid contains the GID of the sender.
777 *
778 * When resolving mac address of destination, the arrived dgid is used
779 * as sgid and, sgid is used as dgid because sgid contains destinations
780 * GID whom to respond to.
781 *
782 * On success the caller is responsible to call rdma_destroy_ah_attr on the
783 * attr.
784 */
ib_init_ah_attr_from_wc(struct ib_device * device,u8 port_num,const struct ib_wc * wc,const struct ib_grh * grh,struct rdma_ah_attr * ah_attr)785 int ib_init_ah_attr_from_wc(struct ib_device *device, u8 port_num,
786 const struct ib_wc *wc, const struct ib_grh *grh,
787 struct rdma_ah_attr *ah_attr)
788 {
789 u32 flow_class;
790 int ret;
791 enum rdma_network_type net_type = RDMA_NETWORK_IB;
792 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
793 const struct ib_gid_attr *sgid_attr;
794 int hoplimit = 0xff;
795 union ib_gid dgid;
796 union ib_gid sgid;
797
798 memset(ah_attr, 0, sizeof *ah_attr);
799 ah_attr->type = rdma_ah_find_type(device, port_num);
800 if (rdma_cap_eth_ah(device, port_num)) {
801 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
802 net_type = wc->network_hdr_type;
803 else
804 net_type = ib_get_net_type_by_grh(device, port_num, grh);
805 gid_type = ib_network_to_gid_type(net_type);
806 }
807 ret = ib_get_gids_from_rdma_hdr((const union rdma_network_hdr *)grh, net_type,
808 &sgid, &dgid);
809 if (ret)
810 return ret;
811
812 rdma_ah_set_sl(ah_attr, wc->sl);
813 rdma_ah_set_port_num(ah_attr, port_num);
814
815 if (rdma_protocol_roce(device, port_num)) {
816 const u16 vlan_id = (wc->wc_flags & IB_WC_WITH_VLAN) ?
817 wc->vlan_id : 0xffff;
818
819 if (!(wc->wc_flags & IB_WC_GRH))
820 return -EPROTOTYPE;
821
822 sgid_attr = get_sgid_attr_from_eth(device, port_num,
823 vlan_id, &dgid,
824 gid_type);
825 if (IS_ERR(sgid_attr))
826 return PTR_ERR(sgid_attr);
827
828 flow_class = be32_to_cpu(grh->version_tclass_flow);
829 rdma_move_grh_sgid_attr(ah_attr,
830 &sgid,
831 flow_class & 0xFFFFF,
832 hoplimit,
833 (flow_class >> 20) & 0xFF,
834 sgid_attr);
835
836 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
837 if (ret)
838 rdma_destroy_ah_attr(ah_attr);
839
840 return ret;
841 } else {
842 rdma_ah_set_dlid(ah_attr, wc->slid);
843 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
844
845 if ((wc->wc_flags & IB_WC_GRH) == 0)
846 return 0;
847
848 if (dgid.global.interface_id !=
849 cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
850 sgid_attr = rdma_find_gid_by_port(
851 device, &dgid, IB_GID_TYPE_IB, port_num, NULL);
852 } else
853 sgid_attr = rdma_get_gid_attr(device, port_num, 0);
854
855 if (IS_ERR(sgid_attr))
856 return PTR_ERR(sgid_attr);
857 flow_class = be32_to_cpu(grh->version_tclass_flow);
858 rdma_move_grh_sgid_attr(ah_attr,
859 &sgid,
860 flow_class & 0xFFFFF,
861 hoplimit,
862 (flow_class >> 20) & 0xFF,
863 sgid_attr);
864
865 return 0;
866 }
867 }
868 EXPORT_SYMBOL(ib_init_ah_attr_from_wc);
869
870 /**
871 * rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership
872 * of the reference
873 *
874 * @attr: Pointer to AH attribute structure
875 * @dgid: Destination GID
876 * @flow_label: Flow label
877 * @hop_limit: Hop limit
878 * @traffic_class: traffic class
879 * @sgid_attr: Pointer to SGID attribute
880 *
881 * This takes ownership of the sgid_attr reference. The caller must ensure
882 * rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after
883 * calling this function.
884 */
rdma_move_grh_sgid_attr(struct rdma_ah_attr * attr,union ib_gid * dgid,u32 flow_label,u8 hop_limit,u8 traffic_class,const struct ib_gid_attr * sgid_attr)885 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,
886 u32 flow_label, u8 hop_limit, u8 traffic_class,
887 const struct ib_gid_attr *sgid_attr)
888 {
889 rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit,
890 traffic_class);
891 attr->grh.sgid_attr = sgid_attr;
892 }
893 EXPORT_SYMBOL(rdma_move_grh_sgid_attr);
894
895 /**
896 * rdma_destroy_ah_attr - Release reference to SGID attribute of
897 * ah attribute.
898 * @ah_attr: Pointer to ah attribute
899 *
900 * Release reference to the SGID attribute of the ah attribute if it is
901 * non NULL. It is safe to call this multiple times, and safe to call it on
902 * a zero initialized ah_attr.
903 */
rdma_destroy_ah_attr(struct rdma_ah_attr * ah_attr)904 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr)
905 {
906 if (ah_attr->grh.sgid_attr) {
907 rdma_put_gid_attr(ah_attr->grh.sgid_attr);
908 ah_attr->grh.sgid_attr = NULL;
909 }
910 }
911 EXPORT_SYMBOL(rdma_destroy_ah_attr);
912
ib_create_ah_from_wc(struct ib_pd * pd,const struct ib_wc * wc,const struct ib_grh * grh,u8 port_num)913 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
914 const struct ib_grh *grh, u8 port_num)
915 {
916 struct rdma_ah_attr ah_attr;
917 struct ib_ah *ah;
918 int ret;
919
920 ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);
921 if (ret)
922 return ERR_PTR(ret);
923
924 ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE);
925
926 rdma_destroy_ah_attr(&ah_attr);
927 return ah;
928 }
929 EXPORT_SYMBOL(ib_create_ah_from_wc);
930
rdma_modify_ah(struct ib_ah * ah,struct rdma_ah_attr * ah_attr)931 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
932 {
933 const struct ib_gid_attr *old_sgid_attr;
934 int ret;
935
936 if (ah->type != ah_attr->type)
937 return -EINVAL;
938
939 ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);
940 if (ret)
941 return ret;
942
943 ret = ah->device->modify_ah ?
944 ah->device->modify_ah(ah, ah_attr) :
945 -EOPNOTSUPP;
946
947 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);
948 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
949 return ret;
950 }
951 EXPORT_SYMBOL(rdma_modify_ah);
952
rdma_query_ah(struct ib_ah * ah,struct rdma_ah_attr * ah_attr)953 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
954 {
955 ah_attr->grh.sgid_attr = NULL;
956
957 return ah->device->query_ah ?
958 ah->device->query_ah(ah, ah_attr) :
959 -EOPNOTSUPP;
960 }
961 EXPORT_SYMBOL(rdma_query_ah);
962
rdma_destroy_ah_user(struct ib_ah * ah,u32 flags,struct ib_udata * udata)963 int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata)
964 {
965 const struct ib_gid_attr *sgid_attr = ah->sgid_attr;
966 struct ib_pd *pd;
967
968 might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE);
969
970 pd = ah->pd;
971 ah->device->destroy_ah(ah, flags);
972 atomic_dec(&pd->usecnt);
973 if (sgid_attr)
974 rdma_put_gid_attr(sgid_attr);
975
976 kfree(ah);
977 return 0;
978 }
979 EXPORT_SYMBOL(rdma_destroy_ah_user);
980
981 /* Shared receive queues */
982
ib_create_srq(struct ib_pd * pd,struct ib_srq_init_attr * srq_init_attr)983 struct ib_srq *ib_create_srq(struct ib_pd *pd,
984 struct ib_srq_init_attr *srq_init_attr)
985 {
986 struct ib_srq *srq;
987 int ret;
988
989 if (!pd->device->create_srq)
990 return ERR_PTR(-EOPNOTSUPP);
991
992 srq = rdma_zalloc_drv_obj(pd->device, ib_srq);
993 if (!srq)
994 return ERR_PTR(-ENOMEM);
995
996 srq->device = pd->device;
997 srq->pd = pd;
998 srq->event_handler = srq_init_attr->event_handler;
999 srq->srq_context = srq_init_attr->srq_context;
1000 srq->srq_type = srq_init_attr->srq_type;
1001
1002 if (ib_srq_has_cq(srq->srq_type)) {
1003 srq->ext.cq = srq_init_attr->ext.cq;
1004 atomic_inc(&srq->ext.cq->usecnt);
1005 }
1006 if (srq->srq_type == IB_SRQT_XRC) {
1007 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
1008 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
1009 }
1010 atomic_inc(&pd->usecnt);
1011
1012 ret = pd->device->create_srq(srq, srq_init_attr, NULL);
1013 if (ret) {
1014 atomic_dec(&srq->pd->usecnt);
1015 if (srq->srq_type == IB_SRQT_XRC)
1016 atomic_dec(&srq->ext.xrc.xrcd->usecnt);
1017 if (ib_srq_has_cq(srq->srq_type))
1018 atomic_dec(&srq->ext.cq->usecnt);
1019 kfree(srq);
1020 return ERR_PTR(ret);
1021 }
1022
1023 return srq;
1024 }
1025 EXPORT_SYMBOL(ib_create_srq);
1026
ib_modify_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr,enum ib_srq_attr_mask srq_attr_mask)1027 int ib_modify_srq(struct ib_srq *srq,
1028 struct ib_srq_attr *srq_attr,
1029 enum ib_srq_attr_mask srq_attr_mask)
1030 {
1031 return srq->device->modify_srq ?
1032 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
1033 -EOPNOTSUPP;
1034 }
1035 EXPORT_SYMBOL(ib_modify_srq);
1036
ib_query_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr)1037 int ib_query_srq(struct ib_srq *srq,
1038 struct ib_srq_attr *srq_attr)
1039 {
1040 return srq->device->query_srq ?
1041 srq->device->query_srq(srq, srq_attr) : -EOPNOTSUPP;
1042 }
1043 EXPORT_SYMBOL(ib_query_srq);
1044
ib_destroy_srq_user(struct ib_srq * srq,struct ib_udata * udata)1045 int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata)
1046 {
1047 if (atomic_read(&srq->usecnt))
1048 return -EBUSY;
1049
1050 srq->device->destroy_srq(srq, udata);
1051
1052 atomic_dec(&srq->pd->usecnt);
1053 if (srq->srq_type == IB_SRQT_XRC)
1054 atomic_dec(&srq->ext.xrc.xrcd->usecnt);
1055 if (ib_srq_has_cq(srq->srq_type))
1056 atomic_dec(&srq->ext.cq->usecnt);
1057 kfree(srq);
1058
1059 return 0;
1060 }
1061 EXPORT_SYMBOL(ib_destroy_srq_user);
1062
1063 /* Queue pairs */
1064
__ib_shared_qp_event_handler(struct ib_event * event,void * context)1065 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
1066 {
1067 struct ib_qp *qp = context;
1068 unsigned long flags;
1069
1070 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
1071 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
1072 if (event->element.qp->event_handler)
1073 event->element.qp->event_handler(event, event->element.qp->qp_context);
1074 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
1075 }
1076
__ib_insert_xrcd_qp(struct ib_xrcd * xrcd,struct ib_qp * qp)1077 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
1078 {
1079 mutex_lock(&xrcd->tgt_qp_mutex);
1080 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
1081 mutex_unlock(&xrcd->tgt_qp_mutex);
1082 }
1083
__ib_open_qp(struct ib_qp * real_qp,void (* event_handler)(struct ib_event *,void *),void * qp_context)1084 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
1085 void (*event_handler)(struct ib_event *, void *),
1086 void *qp_context)
1087 {
1088 struct ib_qp *qp;
1089 unsigned long flags;
1090
1091 qp = kzalloc(sizeof *qp, GFP_KERNEL);
1092 if (!qp)
1093 return ERR_PTR(-ENOMEM);
1094
1095 qp->real_qp = real_qp;
1096 atomic_inc(&real_qp->usecnt);
1097 qp->device = real_qp->device;
1098 qp->event_handler = event_handler;
1099 qp->qp_context = qp_context;
1100 qp->qp_num = real_qp->qp_num;
1101 qp->qp_type = real_qp->qp_type;
1102
1103 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1104 list_add(&qp->open_list, &real_qp->open_list);
1105 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1106
1107 return qp;
1108 }
1109
ib_open_qp(struct ib_xrcd * xrcd,struct ib_qp_open_attr * qp_open_attr)1110 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
1111 struct ib_qp_open_attr *qp_open_attr)
1112 {
1113 struct ib_qp *qp, *real_qp;
1114
1115 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
1116 return ERR_PTR(-EINVAL);
1117
1118 qp = ERR_PTR(-EINVAL);
1119 mutex_lock(&xrcd->tgt_qp_mutex);
1120 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
1121 if (real_qp->qp_num == qp_open_attr->qp_num) {
1122 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
1123 qp_open_attr->qp_context);
1124 break;
1125 }
1126 }
1127 mutex_unlock(&xrcd->tgt_qp_mutex);
1128 return qp;
1129 }
1130 EXPORT_SYMBOL(ib_open_qp);
1131
ib_create_xrc_qp(struct ib_qp * qp,struct ib_qp_init_attr * qp_init_attr)1132 static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp,
1133 struct ib_qp_init_attr *qp_init_attr)
1134 {
1135 struct ib_qp *real_qp = qp;
1136
1137 qp->event_handler = __ib_shared_qp_event_handler;
1138 qp->qp_context = qp;
1139 qp->pd = NULL;
1140 qp->send_cq = qp->recv_cq = NULL;
1141 qp->srq = NULL;
1142 qp->xrcd = qp_init_attr->xrcd;
1143 atomic_inc(&qp_init_attr->xrcd->usecnt);
1144 INIT_LIST_HEAD(&qp->open_list);
1145
1146 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
1147 qp_init_attr->qp_context);
1148 if (!IS_ERR(qp))
1149 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
1150 else
1151 real_qp->device->destroy_qp(real_qp, NULL);
1152 return qp;
1153 }
1154
ib_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * qp_init_attr)1155 struct ib_qp *ib_create_qp(struct ib_pd *pd,
1156 struct ib_qp_init_attr *qp_init_attr)
1157 {
1158 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
1159 struct ib_qp *qp;
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 qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL);
1168 if (IS_ERR(qp))
1169 return qp;
1170
1171 qp->device = device;
1172 qp->real_qp = qp;
1173 qp->uobject = NULL;
1174 qp->qp_type = qp_init_attr->qp_type;
1175 qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
1176
1177 atomic_set(&qp->usecnt, 0);
1178 spin_lock_init(&qp->mr_lock);
1179
1180 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT)
1181 return ib_create_xrc_qp(qp, qp_init_attr);
1182
1183 qp->event_handler = qp_init_attr->event_handler;
1184 qp->qp_context = qp_init_attr->qp_context;
1185 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
1186 qp->recv_cq = NULL;
1187 qp->srq = NULL;
1188 } else {
1189 qp->recv_cq = qp_init_attr->recv_cq;
1190 if (qp_init_attr->recv_cq)
1191 atomic_inc(&qp_init_attr->recv_cq->usecnt);
1192 qp->srq = qp_init_attr->srq;
1193 if (qp->srq)
1194 atomic_inc(&qp_init_attr->srq->usecnt);
1195 }
1196
1197 qp->pd = pd;
1198 qp->send_cq = qp_init_attr->send_cq;
1199 qp->xrcd = NULL;
1200
1201 atomic_inc(&pd->usecnt);
1202 if (qp_init_attr->send_cq)
1203 atomic_inc(&qp_init_attr->send_cq->usecnt);
1204 if (qp_init_attr->rwq_ind_tbl)
1205 atomic_inc(&qp->rwq_ind_tbl->usecnt);
1206
1207 /*
1208 * Note: all hw drivers guarantee that max_send_sge is lower than
1209 * the device RDMA WRITE SGE limit but not all hw drivers ensure that
1210 * max_send_sge <= max_sge_rd.
1211 */
1212 qp->max_write_sge = qp_init_attr->cap.max_send_sge;
1213 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,
1214 device->attrs.max_sge_rd);
1215
1216 return qp;
1217 }
1218 EXPORT_SYMBOL(ib_create_qp);
1219
1220 static const struct {
1221 int valid;
1222 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
1223 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
1224 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
1225 [IB_QPS_RESET] = {
1226 [IB_QPS_RESET] = { .valid = 1 },
1227 [IB_QPS_INIT] = {
1228 .valid = 1,
1229 .req_param = {
1230 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1231 IB_QP_PORT |
1232 IB_QP_QKEY),
1233 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
1234 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
1235 IB_QP_PORT |
1236 IB_QP_ACCESS_FLAGS),
1237 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
1238 IB_QP_PORT |
1239 IB_QP_ACCESS_FLAGS),
1240 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
1241 IB_QP_PORT |
1242 IB_QP_ACCESS_FLAGS),
1243 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
1244 IB_QP_PORT |
1245 IB_QP_ACCESS_FLAGS),
1246 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1247 IB_QP_QKEY),
1248 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1249 IB_QP_QKEY),
1250 }
1251 },
1252 },
1253 [IB_QPS_INIT] = {
1254 [IB_QPS_RESET] = { .valid = 1 },
1255 [IB_QPS_ERR] = { .valid = 1 },
1256 [IB_QPS_INIT] = {
1257 .valid = 1,
1258 .opt_param = {
1259 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1260 IB_QP_PORT |
1261 IB_QP_QKEY),
1262 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
1263 IB_QP_PORT |
1264 IB_QP_ACCESS_FLAGS),
1265 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
1266 IB_QP_PORT |
1267 IB_QP_ACCESS_FLAGS),
1268 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
1269 IB_QP_PORT |
1270 IB_QP_ACCESS_FLAGS),
1271 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
1272 IB_QP_PORT |
1273 IB_QP_ACCESS_FLAGS),
1274 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1275 IB_QP_QKEY),
1276 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1277 IB_QP_QKEY),
1278 }
1279 },
1280 [IB_QPS_RTR] = {
1281 .valid = 1,
1282 .req_param = {
1283 [IB_QPT_UC] = (IB_QP_AV |
1284 IB_QP_PATH_MTU |
1285 IB_QP_DEST_QPN |
1286 IB_QP_RQ_PSN),
1287 [IB_QPT_RC] = (IB_QP_AV |
1288 IB_QP_PATH_MTU |
1289 IB_QP_DEST_QPN |
1290 IB_QP_RQ_PSN |
1291 IB_QP_MAX_DEST_RD_ATOMIC |
1292 IB_QP_MIN_RNR_TIMER),
1293 [IB_QPT_XRC_INI] = (IB_QP_AV |
1294 IB_QP_PATH_MTU |
1295 IB_QP_DEST_QPN |
1296 IB_QP_RQ_PSN),
1297 [IB_QPT_XRC_TGT] = (IB_QP_AV |
1298 IB_QP_PATH_MTU |
1299 IB_QP_DEST_QPN |
1300 IB_QP_RQ_PSN |
1301 IB_QP_MAX_DEST_RD_ATOMIC |
1302 IB_QP_MIN_RNR_TIMER),
1303 },
1304 .opt_param = {
1305 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1306 IB_QP_QKEY),
1307 [IB_QPT_UC] = (IB_QP_ALT_PATH |
1308 IB_QP_ACCESS_FLAGS |
1309 IB_QP_PKEY_INDEX),
1310 [IB_QPT_RC] = (IB_QP_ALT_PATH |
1311 IB_QP_ACCESS_FLAGS |
1312 IB_QP_PKEY_INDEX),
1313 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
1314 IB_QP_ACCESS_FLAGS |
1315 IB_QP_PKEY_INDEX),
1316 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
1317 IB_QP_ACCESS_FLAGS |
1318 IB_QP_PKEY_INDEX),
1319 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1320 IB_QP_QKEY),
1321 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1322 IB_QP_QKEY),
1323 },
1324 },
1325 },
1326 [IB_QPS_RTR] = {
1327 [IB_QPS_RESET] = { .valid = 1 },
1328 [IB_QPS_ERR] = { .valid = 1 },
1329 [IB_QPS_RTS] = {
1330 .valid = 1,
1331 .req_param = {
1332 [IB_QPT_UD] = IB_QP_SQ_PSN,
1333 [IB_QPT_UC] = IB_QP_SQ_PSN,
1334 [IB_QPT_RC] = (IB_QP_TIMEOUT |
1335 IB_QP_RETRY_CNT |
1336 IB_QP_RNR_RETRY |
1337 IB_QP_SQ_PSN |
1338 IB_QP_MAX_QP_RD_ATOMIC),
1339 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
1340 IB_QP_RETRY_CNT |
1341 IB_QP_RNR_RETRY |
1342 IB_QP_SQ_PSN |
1343 IB_QP_MAX_QP_RD_ATOMIC),
1344 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
1345 IB_QP_SQ_PSN),
1346 [IB_QPT_SMI] = IB_QP_SQ_PSN,
1347 [IB_QPT_GSI] = IB_QP_SQ_PSN,
1348 },
1349 .opt_param = {
1350 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1351 IB_QP_QKEY),
1352 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1353 IB_QP_ALT_PATH |
1354 IB_QP_ACCESS_FLAGS |
1355 IB_QP_PATH_MIG_STATE),
1356 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1357 IB_QP_ALT_PATH |
1358 IB_QP_ACCESS_FLAGS |
1359 IB_QP_MIN_RNR_TIMER |
1360 IB_QP_PATH_MIG_STATE),
1361 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1362 IB_QP_ALT_PATH |
1363 IB_QP_ACCESS_FLAGS |
1364 IB_QP_PATH_MIG_STATE),
1365 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1366 IB_QP_ALT_PATH |
1367 IB_QP_ACCESS_FLAGS |
1368 IB_QP_MIN_RNR_TIMER |
1369 IB_QP_PATH_MIG_STATE),
1370 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1371 IB_QP_QKEY),
1372 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1373 IB_QP_QKEY),
1374 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1375 }
1376 }
1377 },
1378 [IB_QPS_RTS] = {
1379 [IB_QPS_RESET] = { .valid = 1 },
1380 [IB_QPS_ERR] = { .valid = 1 },
1381 [IB_QPS_RTS] = {
1382 .valid = 1,
1383 .opt_param = {
1384 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1385 IB_QP_QKEY),
1386 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1387 IB_QP_ACCESS_FLAGS |
1388 IB_QP_ALT_PATH |
1389 IB_QP_PATH_MIG_STATE),
1390 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1391 IB_QP_ACCESS_FLAGS |
1392 IB_QP_ALT_PATH |
1393 IB_QP_PATH_MIG_STATE |
1394 IB_QP_MIN_RNR_TIMER),
1395 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1396 IB_QP_ACCESS_FLAGS |
1397 IB_QP_ALT_PATH |
1398 IB_QP_PATH_MIG_STATE),
1399 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1400 IB_QP_ACCESS_FLAGS |
1401 IB_QP_ALT_PATH |
1402 IB_QP_PATH_MIG_STATE |
1403 IB_QP_MIN_RNR_TIMER),
1404 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1405 IB_QP_QKEY),
1406 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1407 IB_QP_QKEY),
1408 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1409 }
1410 },
1411 [IB_QPS_SQD] = {
1412 .valid = 1,
1413 .opt_param = {
1414 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1415 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1416 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1417 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1418 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
1419 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1420 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
1421 }
1422 },
1423 },
1424 [IB_QPS_SQD] = {
1425 [IB_QPS_RESET] = { .valid = 1 },
1426 [IB_QPS_ERR] = { .valid = 1 },
1427 [IB_QPS_RTS] = {
1428 .valid = 1,
1429 .opt_param = {
1430 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1431 IB_QP_QKEY),
1432 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1433 IB_QP_ALT_PATH |
1434 IB_QP_ACCESS_FLAGS |
1435 IB_QP_PATH_MIG_STATE),
1436 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1437 IB_QP_ALT_PATH |
1438 IB_QP_ACCESS_FLAGS |
1439 IB_QP_MIN_RNR_TIMER |
1440 IB_QP_PATH_MIG_STATE),
1441 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1442 IB_QP_ALT_PATH |
1443 IB_QP_ACCESS_FLAGS |
1444 IB_QP_PATH_MIG_STATE),
1445 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1446 IB_QP_ALT_PATH |
1447 IB_QP_ACCESS_FLAGS |
1448 IB_QP_MIN_RNR_TIMER |
1449 IB_QP_PATH_MIG_STATE),
1450 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1451 IB_QP_QKEY),
1452 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1453 IB_QP_QKEY),
1454 }
1455 },
1456 [IB_QPS_SQD] = {
1457 .valid = 1,
1458 .opt_param = {
1459 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1460 IB_QP_QKEY),
1461 [IB_QPT_UC] = (IB_QP_AV |
1462 IB_QP_ALT_PATH |
1463 IB_QP_ACCESS_FLAGS |
1464 IB_QP_PKEY_INDEX |
1465 IB_QP_PATH_MIG_STATE),
1466 [IB_QPT_RC] = (IB_QP_PORT |
1467 IB_QP_AV |
1468 IB_QP_TIMEOUT |
1469 IB_QP_RETRY_CNT |
1470 IB_QP_RNR_RETRY |
1471 IB_QP_MAX_QP_RD_ATOMIC |
1472 IB_QP_MAX_DEST_RD_ATOMIC |
1473 IB_QP_ALT_PATH |
1474 IB_QP_ACCESS_FLAGS |
1475 IB_QP_PKEY_INDEX |
1476 IB_QP_MIN_RNR_TIMER |
1477 IB_QP_PATH_MIG_STATE),
1478 [IB_QPT_XRC_INI] = (IB_QP_PORT |
1479 IB_QP_AV |
1480 IB_QP_TIMEOUT |
1481 IB_QP_RETRY_CNT |
1482 IB_QP_RNR_RETRY |
1483 IB_QP_MAX_QP_RD_ATOMIC |
1484 IB_QP_ALT_PATH |
1485 IB_QP_ACCESS_FLAGS |
1486 IB_QP_PKEY_INDEX |
1487 IB_QP_PATH_MIG_STATE),
1488 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
1489 IB_QP_AV |
1490 IB_QP_TIMEOUT |
1491 IB_QP_MAX_DEST_RD_ATOMIC |
1492 IB_QP_ALT_PATH |
1493 IB_QP_ACCESS_FLAGS |
1494 IB_QP_PKEY_INDEX |
1495 IB_QP_MIN_RNR_TIMER |
1496 IB_QP_PATH_MIG_STATE),
1497 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1498 IB_QP_QKEY),
1499 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1500 IB_QP_QKEY),
1501 }
1502 }
1503 },
1504 [IB_QPS_SQE] = {
1505 [IB_QPS_RESET] = { .valid = 1 },
1506 [IB_QPS_ERR] = { .valid = 1 },
1507 [IB_QPS_RTS] = {
1508 .valid = 1,
1509 .opt_param = {
1510 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1511 IB_QP_QKEY),
1512 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1513 IB_QP_ACCESS_FLAGS),
1514 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1515 IB_QP_QKEY),
1516 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1517 IB_QP_QKEY),
1518 }
1519 }
1520 },
1521 [IB_QPS_ERR] = {
1522 [IB_QPS_RESET] = { .valid = 1 },
1523 [IB_QPS_ERR] = { .valid = 1 }
1524 }
1525 };
1526
ib_modify_qp_is_ok(enum ib_qp_state cur_state,enum ib_qp_state next_state,enum ib_qp_type type,enum ib_qp_attr_mask mask)1527 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1528 enum ib_qp_type type, enum ib_qp_attr_mask mask)
1529 {
1530 enum ib_qp_attr_mask req_param, opt_param;
1531
1532 if (mask & IB_QP_CUR_STATE &&
1533 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
1534 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
1535 return false;
1536
1537 if (!qp_state_table[cur_state][next_state].valid)
1538 return false;
1539
1540 req_param = qp_state_table[cur_state][next_state].req_param[type];
1541 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
1542
1543 if ((mask & req_param) != req_param)
1544 return false;
1545
1546 if (mask & ~(req_param | opt_param | IB_QP_STATE))
1547 return false;
1548
1549 return true;
1550 }
1551 EXPORT_SYMBOL(ib_modify_qp_is_ok);
1552
1553 /**
1554 * ib_resolve_eth_dmac - Resolve destination mac address
1555 * @device: Device to consider
1556 * @ah_attr: address handle attribute which describes the
1557 * source and destination parameters
1558 * ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It
1559 * returns 0 on success or appropriate error code. It initializes the
1560 * necessary ah_attr fields when call is successful.
1561 */
ib_resolve_eth_dmac(struct ib_device * device,struct rdma_ah_attr * ah_attr)1562 static int ib_resolve_eth_dmac(struct ib_device *device,
1563 struct rdma_ah_attr *ah_attr)
1564 {
1565 int ret = 0;
1566
1567 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1568 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1569 __be32 addr = 0;
1570
1571 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
1572 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);
1573 } else {
1574 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
1575 (char *)ah_attr->roce.dmac);
1576 }
1577 } else {
1578 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
1579 }
1580 return ret;
1581 }
1582
is_qp_type_connected(const struct ib_qp * qp)1583 static bool is_qp_type_connected(const struct ib_qp *qp)
1584 {
1585 return (qp->qp_type == IB_QPT_UC ||
1586 qp->qp_type == IB_QPT_RC ||
1587 qp->qp_type == IB_QPT_XRC_INI ||
1588 qp->qp_type == IB_QPT_XRC_TGT);
1589 }
1590
1591 /**
1592 * IB core internal function to perform QP attributes modification.
1593 */
_ib_modify_qp(struct ib_qp * qp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)1594 static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
1595 int attr_mask, struct ib_udata *udata)
1596 {
1597 u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1598 const struct ib_gid_attr *old_sgid_attr_av;
1599 const struct ib_gid_attr *old_sgid_attr_alt_av;
1600 int ret;
1601
1602 if (attr_mask & IB_QP_AV) {
1603 ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr,
1604 &old_sgid_attr_av);
1605 if (ret)
1606 return ret;
1607 }
1608 if (attr_mask & IB_QP_ALT_PATH) {
1609 /*
1610 * FIXME: This does not track the migration state, so if the
1611 * user loads a new alternate path after the HW has migrated
1612 * from primary->alternate we will keep the wrong
1613 * references. This is OK for IB because the reference
1614 * counting does not serve any functional purpose.
1615 */
1616 ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
1617 &old_sgid_attr_alt_av);
1618 if (ret)
1619 goto out_av;
1620
1621 /*
1622 * Today the core code can only handle alternate paths and APM
1623 * for IB. Ban them in roce mode.
1624 */
1625 if (!(rdma_protocol_ib(qp->device,
1626 attr->alt_ah_attr.port_num) &&
1627 rdma_protocol_ib(qp->device, port))) {
1628 ret = EINVAL;
1629 goto out;
1630 }
1631 }
1632
1633 /*
1634 * If the user provided the qp_attr then we have to resolve it. Kernel
1635 * users have to provide already resolved rdma_ah_attr's
1636 */
1637 if (udata && (attr_mask & IB_QP_AV) &&
1638 attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE &&
1639 is_qp_type_connected(qp)) {
1640 ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
1641 if (ret)
1642 goto out;
1643 }
1644
1645 if (rdma_ib_or_roce(qp->device, port)) {
1646 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {
1647 dev_warn(&qp->device->dev,
1648 "%s rq_psn overflow, masking to 24 bits\n",
1649 __func__);
1650 attr->rq_psn &= 0xffffff;
1651 }
1652
1653 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {
1654 dev_warn(&qp->device->dev,
1655 " %s sq_psn overflow, masking to 24 bits\n",
1656 __func__);
1657 attr->sq_psn &= 0xffffff;
1658 }
1659 }
1660
1661 ret = qp->device->modify_qp(qp, attr, attr_mask, udata);
1662 if (ret)
1663 goto out;
1664
1665 if (attr_mask & IB_QP_PORT)
1666 qp->port = attr->port_num;
1667 if (attr_mask & IB_QP_AV)
1668 qp->av_sgid_attr =
1669 rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr);
1670 if (attr_mask & IB_QP_ALT_PATH)
1671 qp->alt_path_sgid_attr = rdma_update_sgid_attr(
1672 &attr->alt_ah_attr, qp->alt_path_sgid_attr);
1673
1674 out:
1675 if (attr_mask & IB_QP_ALT_PATH)
1676 rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av);
1677 out_av:
1678 if (attr_mask & IB_QP_AV)
1679 rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av);
1680 return ret;
1681 }
1682
1683 /**
1684 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
1685 * @ib_qp: The QP to modify.
1686 * @attr: On input, specifies the QP attributes to modify. On output,
1687 * the current values of selected QP attributes are returned.
1688 * @attr_mask: A bit-mask used to specify which attributes of the QP
1689 * are being modified.
1690 * @udata: pointer to user's input output buffer information
1691 * are being modified.
1692 * It returns 0 on success and returns appropriate error code on error.
1693 */
ib_modify_qp_with_udata(struct ib_qp * ib_qp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)1694 int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,
1695 int attr_mask, struct ib_udata *udata)
1696 {
1697 return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);
1698 }
1699 EXPORT_SYMBOL(ib_modify_qp_with_udata);
1700
ib_get_eth_speed(struct ib_device * dev,u8 port_num,u16 * speed,u8 * width)1701 int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u16 *speed, u8 *width)
1702 {
1703 uint64_t netdev_speed;
1704 if_t netdev;
1705
1706 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET)
1707 return -EINVAL;
1708
1709 if (!dev->get_netdev)
1710 return -EOPNOTSUPP;
1711
1712 netdev = dev->get_netdev(dev, port_num);
1713 if (!netdev)
1714 return -ENODEV;
1715
1716 netdev_speed = if_getbaudrate(netdev);
1717
1718 dev_put(netdev);
1719
1720 if (netdev_speed == 0) {
1721 netdev_speed = IF_Mbps(1000);
1722 if_printf(netdev, "speed is unknown, defaulting to 1Gbps\n");
1723 }
1724
1725 if (netdev_speed <= IF_Mbps(1000)) {
1726 *width = IB_WIDTH_1X;
1727 *speed = IB_SPEED_SDR;
1728 } else if (netdev_speed <= IF_Mbps(10000)) {
1729 *width = IB_WIDTH_1X;
1730 *speed = IB_SPEED_FDR10;
1731 } else if (netdev_speed <= IF_Mbps(20000)) {
1732 *width = IB_WIDTH_4X;
1733 *speed = IB_SPEED_DDR;
1734 } else if (netdev_speed <= IF_Mbps(25000)) {
1735 *width = IB_WIDTH_1X;
1736 *speed = IB_SPEED_EDR;
1737 } else if (netdev_speed <= IF_Mbps(40000)) {
1738 *width = IB_WIDTH_4X;
1739 *speed = IB_SPEED_FDR10;
1740 } else {
1741 *width = IB_WIDTH_4X;
1742 *speed = IB_SPEED_EDR;
1743 }
1744
1745 return 0;
1746 }
1747 EXPORT_SYMBOL(ib_get_eth_speed);
1748
ib_modify_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask)1749 int ib_modify_qp(struct ib_qp *qp,
1750 struct ib_qp_attr *qp_attr,
1751 int qp_attr_mask)
1752 {
1753 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1754 }
1755 EXPORT_SYMBOL(ib_modify_qp);
1756
ib_query_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_qp_init_attr * qp_init_attr)1757 int ib_query_qp(struct ib_qp *qp,
1758 struct ib_qp_attr *qp_attr,
1759 int qp_attr_mask,
1760 struct ib_qp_init_attr *qp_init_attr)
1761 {
1762 qp_attr->ah_attr.grh.sgid_attr = NULL;
1763 qp_attr->alt_ah_attr.grh.sgid_attr = NULL;
1764
1765 return qp->device->query_qp ?
1766 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1767 -EOPNOTSUPP;
1768 }
1769 EXPORT_SYMBOL(ib_query_qp);
1770
ib_close_qp(struct ib_qp * qp)1771 int ib_close_qp(struct ib_qp *qp)
1772 {
1773 struct ib_qp *real_qp;
1774 unsigned long flags;
1775
1776 real_qp = qp->real_qp;
1777 if (real_qp == qp)
1778 return -EINVAL;
1779
1780 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1781 list_del(&qp->open_list);
1782 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1783
1784 atomic_dec(&real_qp->usecnt);
1785 kfree(qp);
1786
1787 return 0;
1788 }
1789 EXPORT_SYMBOL(ib_close_qp);
1790
__ib_destroy_shared_qp(struct ib_qp * qp)1791 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1792 {
1793 struct ib_xrcd *xrcd;
1794 struct ib_qp *real_qp;
1795 int ret;
1796
1797 real_qp = qp->real_qp;
1798 xrcd = real_qp->xrcd;
1799
1800 mutex_lock(&xrcd->tgt_qp_mutex);
1801 ib_close_qp(qp);
1802 if (atomic_read(&real_qp->usecnt) == 0)
1803 list_del(&real_qp->xrcd_list);
1804 else
1805 real_qp = NULL;
1806 mutex_unlock(&xrcd->tgt_qp_mutex);
1807
1808 if (real_qp) {
1809 ret = ib_destroy_qp(real_qp);
1810 if (!ret)
1811 atomic_dec(&xrcd->usecnt);
1812 else
1813 __ib_insert_xrcd_qp(xrcd, real_qp);
1814 }
1815
1816 return 0;
1817 }
1818
ib_destroy_qp_user(struct ib_qp * qp,struct ib_udata * udata)1819 int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata)
1820 {
1821 const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr;
1822 const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr;
1823 struct ib_pd *pd;
1824 struct ib_cq *scq, *rcq;
1825 struct ib_srq *srq;
1826 struct ib_rwq_ind_table *ind_tbl;
1827 int ret;
1828
1829 if (atomic_read(&qp->usecnt))
1830 return -EBUSY;
1831
1832 if (qp->real_qp != qp)
1833 return __ib_destroy_shared_qp(qp);
1834
1835 pd = qp->pd;
1836 scq = qp->send_cq;
1837 rcq = qp->recv_cq;
1838 srq = qp->srq;
1839 ind_tbl = qp->rwq_ind_tbl;
1840
1841 ret = qp->device->destroy_qp(qp, udata);
1842 if (!ret) {
1843 if (alt_path_sgid_attr)
1844 rdma_put_gid_attr(alt_path_sgid_attr);
1845 if (av_sgid_attr)
1846 rdma_put_gid_attr(av_sgid_attr);
1847 if (pd)
1848 atomic_dec(&pd->usecnt);
1849 if (scq)
1850 atomic_dec(&scq->usecnt);
1851 if (rcq)
1852 atomic_dec(&rcq->usecnt);
1853 if (srq)
1854 atomic_dec(&srq->usecnt);
1855 if (ind_tbl)
1856 atomic_dec(&ind_tbl->usecnt);
1857 }
1858
1859 return ret;
1860 }
1861 EXPORT_SYMBOL(ib_destroy_qp_user);
1862
1863 /* Completion queues */
1864
__ib_create_cq(struct ib_device * device,ib_comp_handler comp_handler,void (* event_handler)(struct ib_event *,void *),void * cq_context,const struct ib_cq_init_attr * cq_attr,const char * caller)1865 struct ib_cq *__ib_create_cq(struct ib_device *device,
1866 ib_comp_handler comp_handler,
1867 void (*event_handler)(struct ib_event *, void *),
1868 void *cq_context,
1869 const struct ib_cq_init_attr *cq_attr,
1870 const char *caller)
1871 {
1872 struct ib_cq *cq;
1873 int ret;
1874
1875 cq = rdma_zalloc_drv_obj(device, ib_cq);
1876 if (!cq)
1877 return ERR_PTR(-ENOMEM);
1878
1879 cq->device = device;
1880 cq->uobject = NULL;
1881 cq->comp_handler = comp_handler;
1882 cq->event_handler = event_handler;
1883 cq->cq_context = cq_context;
1884 atomic_set(&cq->usecnt, 0);
1885
1886 ret = device->create_cq(cq, cq_attr, NULL);
1887 if (ret) {
1888 kfree(cq);
1889 return ERR_PTR(ret);
1890 }
1891
1892 return cq;
1893 }
1894 EXPORT_SYMBOL(__ib_create_cq);
1895
rdma_set_cq_moderation(struct ib_cq * cq,u16 cq_count,u16 cq_period)1896 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1897 {
1898 return cq->device->modify_cq ?
1899 cq->device->modify_cq(cq, cq_count, cq_period) : -EOPNOTSUPP;
1900 }
1901 EXPORT_SYMBOL(rdma_set_cq_moderation);
1902
ib_destroy_cq_user(struct ib_cq * cq,struct ib_udata * udata)1903 int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
1904 {
1905 if (atomic_read(&cq->usecnt))
1906 return -EBUSY;
1907
1908 cq->device->destroy_cq(cq, udata);
1909 kfree(cq);
1910 return 0;
1911 }
1912 EXPORT_SYMBOL(ib_destroy_cq_user);
1913
ib_resize_cq(struct ib_cq * cq,int cqe)1914 int ib_resize_cq(struct ib_cq *cq, int cqe)
1915 {
1916 return cq->device->resize_cq ?
1917 cq->device->resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
1918 }
1919 EXPORT_SYMBOL(ib_resize_cq);
1920
1921 /* Memory regions */
1922
ib_dereg_mr_user(struct ib_mr * mr,struct ib_udata * udata)1923 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)
1924 {
1925 struct ib_pd *pd = mr->pd;
1926 struct ib_dm *dm = mr->dm;
1927 struct ib_sig_attrs *sig_attrs = mr->sig_attrs;
1928 int ret;
1929
1930 ret = mr->device->dereg_mr(mr, udata);
1931 if (!ret) {
1932 atomic_dec(&pd->usecnt);
1933 if (dm)
1934 atomic_dec(&dm->usecnt);
1935 kfree(sig_attrs);
1936 }
1937
1938 return ret;
1939 }
1940 EXPORT_SYMBOL(ib_dereg_mr_user);
1941
1942 /**
1943 * ib_alloc_mr_user() - Allocates a memory region
1944 * @pd: protection domain associated with the region
1945 * @mr_type: memory region type
1946 * @max_num_sg: maximum sg entries available for registration.
1947 * @udata: user data or null for kernel objects
1948 *
1949 * Notes:
1950 * Memory registeration page/sg lists must not exceed max_num_sg.
1951 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1952 * max_num_sg * used_page_size.
1953 *
1954 */
ib_alloc_mr_user(struct ib_pd * pd,enum ib_mr_type mr_type,u32 max_num_sg,struct ib_udata * udata)1955 struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
1956 u32 max_num_sg, struct ib_udata *udata)
1957 {
1958 struct ib_mr *mr;
1959
1960 if (!pd->device->alloc_mr) {
1961 mr = ERR_PTR(-EOPNOTSUPP);
1962 goto out;
1963 }
1964
1965 if (mr_type == IB_MR_TYPE_INTEGRITY) {
1966 WARN_ON_ONCE(1);
1967 mr = ERR_PTR(-EINVAL);
1968 goto out;
1969 }
1970
1971 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg, udata);
1972 if (!IS_ERR(mr)) {
1973 mr->device = pd->device;
1974 mr->pd = pd;
1975 mr->dm = NULL;
1976 mr->uobject = NULL;
1977 atomic_inc(&pd->usecnt);
1978 mr->need_inval = false;
1979 mr->type = mr_type;
1980 mr->sig_attrs = NULL;
1981 }
1982
1983 out:
1984 return mr;
1985 }
1986 EXPORT_SYMBOL(ib_alloc_mr_user);
1987
1988 /* "Fast" memory regions */
1989
ib_alloc_fmr(struct ib_pd * pd,int mr_access_flags,struct ib_fmr_attr * fmr_attr)1990 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1991 int mr_access_flags,
1992 struct ib_fmr_attr *fmr_attr)
1993 {
1994 struct ib_fmr *fmr;
1995
1996 if (!pd->device->alloc_fmr)
1997 return ERR_PTR(-EOPNOTSUPP);
1998
1999 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
2000 if (!IS_ERR(fmr)) {
2001 fmr->device = pd->device;
2002 fmr->pd = pd;
2003 atomic_inc(&pd->usecnt);
2004 }
2005
2006 return fmr;
2007 }
2008 EXPORT_SYMBOL(ib_alloc_fmr);
2009
ib_unmap_fmr(struct list_head * fmr_list)2010 int ib_unmap_fmr(struct list_head *fmr_list)
2011 {
2012 struct ib_fmr *fmr;
2013
2014 if (list_empty(fmr_list))
2015 return 0;
2016
2017 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
2018 return fmr->device->unmap_fmr(fmr_list);
2019 }
2020 EXPORT_SYMBOL(ib_unmap_fmr);
2021
ib_dealloc_fmr(struct ib_fmr * fmr)2022 int ib_dealloc_fmr(struct ib_fmr *fmr)
2023 {
2024 struct ib_pd *pd;
2025 int ret;
2026
2027 pd = fmr->pd;
2028 ret = fmr->device->dealloc_fmr(fmr);
2029 if (!ret)
2030 atomic_dec(&pd->usecnt);
2031
2032 return ret;
2033 }
2034 EXPORT_SYMBOL(ib_dealloc_fmr);
2035
2036 /* Multicast groups */
2037
is_valid_mcast_lid(struct ib_qp * qp,u16 lid)2038 static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
2039 {
2040 struct ib_qp_init_attr init_attr = {};
2041 struct ib_qp_attr attr = {};
2042 int num_eth_ports = 0;
2043 int port;
2044
2045 /* If QP state >= init, it is assigned to a port and we can check this
2046 * port only.
2047 */
2048 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
2049 if (attr.qp_state >= IB_QPS_INIT) {
2050 if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
2051 IB_LINK_LAYER_INFINIBAND)
2052 return true;
2053 goto lid_check;
2054 }
2055 }
2056
2057 /* Can't get a quick answer, iterate over all ports */
2058 for (port = 0; port < qp->device->phys_port_cnt; port++)
2059 if (rdma_port_get_link_layer(qp->device, port) !=
2060 IB_LINK_LAYER_INFINIBAND)
2061 num_eth_ports++;
2062
2063 /* If we have at lease one Ethernet port, RoCE annex declares that
2064 * multicast LID should be ignored. We can't tell at this step if the
2065 * QP belongs to an IB or Ethernet port.
2066 */
2067 if (num_eth_ports)
2068 return true;
2069
2070 /* If all the ports are IB, we can check according to IB spec. */
2071 lid_check:
2072 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
2073 lid == be16_to_cpu(IB_LID_PERMISSIVE));
2074 }
2075
ib_attach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)2076 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
2077 {
2078 int ret;
2079
2080 if (!qp->device->attach_mcast)
2081 return -EOPNOTSUPP;
2082
2083 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
2084 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2085 return -EINVAL;
2086
2087 ret = qp->device->attach_mcast(qp, gid, lid);
2088 if (!ret)
2089 atomic_inc(&qp->usecnt);
2090 return ret;
2091 }
2092 EXPORT_SYMBOL(ib_attach_mcast);
2093
ib_detach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)2094 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
2095 {
2096 int ret;
2097
2098 if (!qp->device->detach_mcast)
2099 return -EOPNOTSUPP;
2100
2101 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
2102 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2103 return -EINVAL;
2104
2105 ret = qp->device->detach_mcast(qp, gid, lid);
2106 if (!ret)
2107 atomic_dec(&qp->usecnt);
2108 return ret;
2109 }
2110 EXPORT_SYMBOL(ib_detach_mcast);
2111
__ib_alloc_xrcd(struct ib_device * device,const char * caller)2112 struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller)
2113 {
2114 struct ib_xrcd *xrcd;
2115
2116 if (!device->alloc_xrcd)
2117 return ERR_PTR(-EOPNOTSUPP);
2118
2119 xrcd = device->alloc_xrcd(device, NULL);
2120 if (!IS_ERR(xrcd)) {
2121 xrcd->device = device;
2122 xrcd->inode = NULL;
2123 atomic_set(&xrcd->usecnt, 0);
2124 mutex_init(&xrcd->tgt_qp_mutex);
2125 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
2126 }
2127
2128 return xrcd;
2129 }
2130 EXPORT_SYMBOL(__ib_alloc_xrcd);
2131
ib_dealloc_xrcd(struct ib_xrcd * xrcd,struct ib_udata * udata)2132 int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata)
2133 {
2134 struct ib_qp *qp;
2135 int ret;
2136
2137 if (atomic_read(&xrcd->usecnt))
2138 return -EBUSY;
2139
2140 while (!list_empty(&xrcd->tgt_qp_list)) {
2141 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
2142 ret = ib_destroy_qp(qp);
2143 if (ret)
2144 return ret;
2145 }
2146 mutex_destroy(&xrcd->tgt_qp_mutex);
2147
2148 return xrcd->device->dealloc_xrcd(xrcd, udata);
2149 }
2150 EXPORT_SYMBOL(ib_dealloc_xrcd);
2151
2152 /**
2153 * ib_create_wq - Creates a WQ associated with the specified protection
2154 * domain.
2155 * @pd: The protection domain associated with the WQ.
2156 * @wq_init_attr: A list of initial attributes required to create the
2157 * WQ. If WQ creation succeeds, then the attributes are updated to
2158 * the actual capabilities of the created WQ.
2159 *
2160 * wq_init_attr->max_wr and wq_init_attr->max_sge determine
2161 * the requested size of the WQ, and set to the actual values allocated
2162 * on return.
2163 * If ib_create_wq() succeeds, then max_wr and max_sge will always be
2164 * at least as large as the requested values.
2165 */
ib_create_wq(struct ib_pd * pd,struct ib_wq_init_attr * wq_attr)2166 struct ib_wq *ib_create_wq(struct ib_pd *pd,
2167 struct ib_wq_init_attr *wq_attr)
2168 {
2169 struct ib_wq *wq;
2170
2171 if (!pd->device->create_wq)
2172 return ERR_PTR(-EOPNOTSUPP);
2173
2174 wq = pd->device->create_wq(pd, wq_attr, NULL);
2175 if (!IS_ERR(wq)) {
2176 wq->event_handler = wq_attr->event_handler;
2177 wq->wq_context = wq_attr->wq_context;
2178 wq->wq_type = wq_attr->wq_type;
2179 wq->cq = wq_attr->cq;
2180 wq->device = pd->device;
2181 wq->pd = pd;
2182 wq->uobject = NULL;
2183 atomic_inc(&pd->usecnt);
2184 atomic_inc(&wq_attr->cq->usecnt);
2185 atomic_set(&wq->usecnt, 0);
2186 }
2187 return wq;
2188 }
2189 EXPORT_SYMBOL(ib_create_wq);
2190
2191 /**
2192 * ib_destroy_wq - Destroys the specified user WQ.
2193 * @wq: The WQ to destroy.
2194 * @udata: Valid user data
2195 */
ib_destroy_wq(struct ib_wq * wq,struct ib_udata * udata)2196 int ib_destroy_wq(struct ib_wq *wq, struct ib_udata *udata)
2197 {
2198 struct ib_cq *cq = wq->cq;
2199 struct ib_pd *pd = wq->pd;
2200
2201 if (atomic_read(&wq->usecnt))
2202 return -EBUSY;
2203
2204 wq->device->destroy_wq(wq, udata);
2205 atomic_dec(&pd->usecnt);
2206 atomic_dec(&cq->usecnt);
2207
2208 return 0;
2209 }
2210 EXPORT_SYMBOL(ib_destroy_wq);
2211
2212 /**
2213 * ib_modify_wq - Modifies the specified WQ.
2214 * @wq: The WQ to modify.
2215 * @wq_attr: On input, specifies the WQ attributes to modify.
2216 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
2217 * are being modified.
2218 * On output, the current values of selected WQ attributes are returned.
2219 */
ib_modify_wq(struct ib_wq * wq,struct ib_wq_attr * wq_attr,u32 wq_attr_mask)2220 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
2221 u32 wq_attr_mask)
2222 {
2223 int err;
2224
2225 if (!wq->device->modify_wq)
2226 return -EOPNOTSUPP;
2227
2228 err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL);
2229 return err;
2230 }
2231 EXPORT_SYMBOL(ib_modify_wq);
2232
2233 /*
2234 * ib_create_rwq_ind_table - Creates a RQ Indirection Table.
2235 * @device: The device on which to create the rwq indirection table.
2236 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to
2237 * create the Indirection Table.
2238 *
2239 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
2240 * than the created ib_rwq_ind_table object and the caller is responsible
2241 * for its memory allocation/free.
2242 */
ib_create_rwq_ind_table(struct ib_device * device,struct ib_rwq_ind_table_init_attr * init_attr)2243 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
2244 struct ib_rwq_ind_table_init_attr *init_attr)
2245 {
2246 struct ib_rwq_ind_table *rwq_ind_table;
2247 int i;
2248 u32 table_size;
2249
2250 if (!device->create_rwq_ind_table)
2251 return ERR_PTR(-EOPNOTSUPP);
2252
2253 table_size = (1 << init_attr->log_ind_tbl_size);
2254 rwq_ind_table = device->create_rwq_ind_table(device,
2255 init_attr, NULL);
2256 if (IS_ERR(rwq_ind_table))
2257 return rwq_ind_table;
2258
2259 rwq_ind_table->ind_tbl = init_attr->ind_tbl;
2260 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size;
2261 rwq_ind_table->device = device;
2262 rwq_ind_table->uobject = NULL;
2263 atomic_set(&rwq_ind_table->usecnt, 0);
2264
2265 for (i = 0; i < table_size; i++)
2266 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt);
2267
2268 return rwq_ind_table;
2269 }
2270 EXPORT_SYMBOL(ib_create_rwq_ind_table);
2271
2272 /*
2273 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
2274 * @wq_ind_table: The Indirection Table to destroy.
2275 */
ib_destroy_rwq_ind_table(struct ib_rwq_ind_table * rwq_ind_table)2276 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table)
2277 {
2278 int err, i;
2279 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size);
2280 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl;
2281
2282 if (atomic_read(&rwq_ind_table->usecnt))
2283 return -EBUSY;
2284
2285 err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table);
2286 if (!err) {
2287 for (i = 0; i < table_size; i++)
2288 atomic_dec(&ind_tbl[i]->usecnt);
2289 }
2290
2291 return err;
2292 }
2293 EXPORT_SYMBOL(ib_destroy_rwq_ind_table);
2294
ib_check_mr_status(struct ib_mr * mr,u32 check_mask,struct ib_mr_status * mr_status)2295 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
2296 struct ib_mr_status *mr_status)
2297 {
2298 return mr->device->check_mr_status ?
2299 mr->device->check_mr_status(mr, check_mask, mr_status) : -EOPNOTSUPP;
2300 }
2301 EXPORT_SYMBOL(ib_check_mr_status);
2302
ib_set_vf_link_state(struct ib_device * device,int vf,u8 port,int state)2303 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
2304 int state)
2305 {
2306 if (!device->set_vf_link_state)
2307 return -EOPNOTSUPP;
2308
2309 return device->set_vf_link_state(device, vf, port, state);
2310 }
2311 EXPORT_SYMBOL(ib_set_vf_link_state);
2312
ib_get_vf_config(struct ib_device * device,int vf,u8 port,struct ifla_vf_info * info)2313 int ib_get_vf_config(struct ib_device *device, int vf, u8 port,
2314 struct ifla_vf_info *info)
2315 {
2316 if (!device->get_vf_config)
2317 return -EOPNOTSUPP;
2318
2319 return device->get_vf_config(device, vf, port, info);
2320 }
2321 EXPORT_SYMBOL(ib_get_vf_config);
2322
ib_get_vf_stats(struct ib_device * device,int vf,u8 port,struct ifla_vf_stats * stats)2323 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port,
2324 struct ifla_vf_stats *stats)
2325 {
2326 if (!device->get_vf_stats)
2327 return -EOPNOTSUPP;
2328
2329 return device->get_vf_stats(device, vf, port, stats);
2330 }
2331 EXPORT_SYMBOL(ib_get_vf_stats);
2332
ib_set_vf_guid(struct ib_device * device,int vf,u8 port,u64 guid,int type)2333 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
2334 int type)
2335 {
2336 if (!device->set_vf_guid)
2337 return -EOPNOTSUPP;
2338
2339 return device->set_vf_guid(device, vf, port, guid, type);
2340 }
2341 EXPORT_SYMBOL(ib_set_vf_guid);
2342
2343 /**
2344 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
2345 * and set it the memory region.
2346 * @mr: memory region
2347 * @sg: dma mapped scatterlist
2348 * @sg_nents: number of entries in sg
2349 * @sg_offset: offset in bytes into sg
2350 * @page_size: page vector desired page size
2351 *
2352 * Constraints:
2353 * - The first sg element is allowed to have an offset.
2354 * - Each sg element must either be aligned to page_size or virtually
2355 * contiguous to the previous element. In case an sg element has a
2356 * non-contiguous offset, the mapping prefix will not include it.
2357 * - The last sg element is allowed to have length less than page_size.
2358 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
2359 * then only max_num_sg entries will be mapped.
2360 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
2361 * constraints holds and the page_size argument is ignored.
2362 *
2363 * Returns the number of sg elements that were mapped to the memory region.
2364 *
2365 * After this completes successfully, the memory region
2366 * is ready for registration.
2367 */
ib_map_mr_sg(struct ib_mr * mr,struct scatterlist * sg,int sg_nents,unsigned int * sg_offset,unsigned int page_size)2368 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
2369 unsigned int *sg_offset, unsigned int page_size)
2370 {
2371 if (unlikely(!mr->device->map_mr_sg))
2372 return -EOPNOTSUPP;
2373
2374 mr->page_size = page_size;
2375
2376 return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset);
2377 }
2378 EXPORT_SYMBOL(ib_map_mr_sg);
2379
2380 /**
2381 * ib_sg_to_pages() - Convert the largest prefix of a sg list
2382 * to a page vector
2383 * @mr: memory region
2384 * @sgl: dma mapped scatterlist
2385 * @sg_nents: number of entries in sg
2386 * @sg_offset_p: IN: start offset in bytes into sg
2387 * OUT: offset in bytes for element n of the sg of the first
2388 * byte that has not been processed where n is the return
2389 * value of this function.
2390 * @set_page: driver page assignment function pointer
2391 *
2392 * Core service helper for drivers to convert the largest
2393 * prefix of given sg list to a page vector. The sg list
2394 * prefix converted is the prefix that meet the requirements
2395 * of ib_map_mr_sg.
2396 *
2397 * Returns the number of sg elements that were assigned to
2398 * a page vector.
2399 */
ib_sg_to_pages(struct ib_mr * mr,struct scatterlist * sgl,int sg_nents,unsigned int * sg_offset_p,int (* set_page)(struct ib_mr *,u64))2400 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
2401 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
2402 {
2403 struct scatterlist *sg;
2404 u64 last_end_dma_addr = 0;
2405 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
2406 unsigned int last_page_off = 0;
2407 u64 page_mask = ~((u64)mr->page_size - 1);
2408 int i, ret;
2409
2410 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
2411 return -EINVAL;
2412
2413 mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
2414 mr->length = 0;
2415
2416 for_each_sg(sgl, sg, sg_nents, i) {
2417 u64 dma_addr = sg_dma_address(sg) + sg_offset;
2418 u64 prev_addr = dma_addr;
2419 unsigned int dma_len = sg_dma_len(sg) - sg_offset;
2420 u64 end_dma_addr = dma_addr + dma_len;
2421 u64 page_addr = dma_addr & page_mask;
2422
2423 /*
2424 * For the second and later elements, check whether either the
2425 * end of element i-1 or the start of element i is not aligned
2426 * on a page boundary.
2427 */
2428 if (i && (last_page_off != 0 || page_addr != dma_addr)) {
2429 /* Stop mapping if there is a gap. */
2430 if (last_end_dma_addr != dma_addr)
2431 break;
2432
2433 /*
2434 * Coalesce this element with the last. If it is small
2435 * enough just update mr->length. Otherwise start
2436 * mapping from the next page.
2437 */
2438 goto next_page;
2439 }
2440
2441 do {
2442 ret = set_page(mr, page_addr);
2443 if (unlikely(ret < 0)) {
2444 sg_offset = prev_addr - sg_dma_address(sg);
2445 mr->length += prev_addr - dma_addr;
2446 if (sg_offset_p)
2447 *sg_offset_p = sg_offset;
2448 return i || sg_offset ? i : ret;
2449 }
2450 prev_addr = page_addr;
2451 next_page:
2452 page_addr += mr->page_size;
2453 } while (page_addr < end_dma_addr);
2454
2455 mr->length += dma_len;
2456 last_end_dma_addr = end_dma_addr;
2457 last_page_off = end_dma_addr & ~page_mask;
2458
2459 sg_offset = 0;
2460 }
2461
2462 if (sg_offset_p)
2463 *sg_offset_p = 0;
2464 return i;
2465 }
2466 EXPORT_SYMBOL(ib_sg_to_pages);
2467
2468 struct ib_drain_cqe {
2469 struct ib_cqe cqe;
2470 struct completion done;
2471 };
2472
ib_drain_qp_done(struct ib_cq * cq,struct ib_wc * wc)2473 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
2474 {
2475 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
2476 cqe);
2477
2478 complete(&cqe->done);
2479 }
2480
2481 /*
2482 * Post a WR and block until its completion is reaped for the SQ.
2483 */
__ib_drain_sq(struct ib_qp * qp)2484 static void __ib_drain_sq(struct ib_qp *qp)
2485 {
2486 struct ib_cq *cq = qp->send_cq;
2487 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2488 struct ib_drain_cqe sdrain;
2489 struct ib_rdma_wr swr = {
2490 .wr = {
2491 .opcode = IB_WR_RDMA_WRITE,
2492 .wr_cqe = &sdrain.cqe,
2493 },
2494 };
2495 int ret;
2496
2497 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2498 if (ret) {
2499 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2500 return;
2501 }
2502
2503 sdrain.cqe.done = ib_drain_qp_done;
2504 init_completion(&sdrain.done);
2505
2506 ret = ib_post_send(qp, &swr.wr, NULL);
2507 if (ret) {
2508 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2509 return;
2510 }
2511
2512 if (cq->poll_ctx == IB_POLL_DIRECT)
2513 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)
2514 ib_process_cq_direct(cq, -1);
2515 else
2516 wait_for_completion(&sdrain.done);
2517 }
2518
2519 /*
2520 * Post a WR and block until its completion is reaped for the RQ.
2521 */
__ib_drain_rq(struct ib_qp * qp)2522 static void __ib_drain_rq(struct ib_qp *qp)
2523 {
2524 struct ib_cq *cq = qp->recv_cq;
2525 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2526 struct ib_drain_cqe rdrain;
2527 struct ib_recv_wr rwr = {};
2528 int ret;
2529
2530 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2531 if (ret) {
2532 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2533 return;
2534 }
2535
2536 rwr.wr_cqe = &rdrain.cqe;
2537 rdrain.cqe.done = ib_drain_qp_done;
2538 init_completion(&rdrain.done);
2539
2540 ret = ib_post_recv(qp, &rwr, NULL);
2541 if (ret) {
2542 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2543 return;
2544 }
2545
2546 if (cq->poll_ctx == IB_POLL_DIRECT)
2547 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)
2548 ib_process_cq_direct(cq, -1);
2549 else
2550 wait_for_completion(&rdrain.done);
2551 }
2552
2553 /**
2554 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
2555 * application.
2556 * @qp: queue pair to drain
2557 *
2558 * If the device has a provider-specific drain function, then
2559 * call that. Otherwise call the generic drain function
2560 * __ib_drain_sq().
2561 *
2562 * The caller must:
2563 *
2564 * ensure there is room in the CQ and SQ for the drain work request and
2565 * completion.
2566 *
2567 * allocate the CQ using ib_alloc_cq().
2568 *
2569 * ensure that there are no other contexts that are posting WRs concurrently.
2570 * Otherwise the drain is not guaranteed.
2571 */
ib_drain_sq(struct ib_qp * qp)2572 void ib_drain_sq(struct ib_qp *qp)
2573 {
2574 if (qp->device->drain_sq)
2575 qp->device->drain_sq(qp);
2576 else
2577 __ib_drain_sq(qp);
2578 }
2579 EXPORT_SYMBOL(ib_drain_sq);
2580
2581 /**
2582 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
2583 * application.
2584 * @qp: queue pair to drain
2585 *
2586 * If the device has a provider-specific drain function, then
2587 * call that. Otherwise call the generic drain function
2588 * __ib_drain_rq().
2589 *
2590 * The caller must:
2591 *
2592 * ensure there is room in the CQ and RQ for the drain work request and
2593 * completion.
2594 *
2595 * allocate the CQ using ib_alloc_cq().
2596 *
2597 * ensure that there are no other contexts that are posting WRs concurrently.
2598 * Otherwise the drain is not guaranteed.
2599 */
ib_drain_rq(struct ib_qp * qp)2600 void ib_drain_rq(struct ib_qp *qp)
2601 {
2602 if (qp->device->drain_rq)
2603 qp->device->drain_rq(qp);
2604 else
2605 __ib_drain_rq(qp);
2606 }
2607 EXPORT_SYMBOL(ib_drain_rq);
2608
2609 /**
2610 * ib_drain_qp() - Block until all CQEs have been consumed by the
2611 * application on both the RQ and SQ.
2612 * @qp: queue pair to drain
2613 *
2614 * The caller must:
2615 *
2616 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
2617 * and completions.
2618 *
2619 * allocate the CQs using ib_alloc_cq().
2620 *
2621 * ensure that there are no other contexts that are posting WRs concurrently.
2622 * Otherwise the drain is not guaranteed.
2623 */
ib_drain_qp(struct ib_qp * qp)2624 void ib_drain_qp(struct ib_qp *qp)
2625 {
2626 ib_drain_sq(qp);
2627 if (!qp->srq)
2628 ib_drain_rq(qp);
2629 }
2630 EXPORT_SYMBOL(ib_drain_qp);
2631