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
49 #include <rdma/ib_verbs.h>
50 #include <rdma/ib_cache.h>
51 #include <rdma/ib_addr.h>
52
53 #include <netinet/ip.h>
54 #include <netinet/ip6.h>
55
56 #include <machine/in_cksum.h>
57
58 #include "core_priv.h"
59
60 static const char * const ib_events[] = {
61 [IB_EVENT_CQ_ERR] = "CQ error",
62 [IB_EVENT_QP_FATAL] = "QP fatal error",
63 [IB_EVENT_QP_REQ_ERR] = "QP request error",
64 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
65 [IB_EVENT_COMM_EST] = "communication established",
66 [IB_EVENT_SQ_DRAINED] = "send queue drained",
67 [IB_EVENT_PATH_MIG] = "path migration successful",
68 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
69 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
70 [IB_EVENT_PORT_ACTIVE] = "port active",
71 [IB_EVENT_PORT_ERR] = "port error",
72 [IB_EVENT_LID_CHANGE] = "LID change",
73 [IB_EVENT_PKEY_CHANGE] = "P_key change",
74 [IB_EVENT_SM_CHANGE] = "SM change",
75 [IB_EVENT_SRQ_ERR] = "SRQ error",
76 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
77 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
78 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
79 [IB_EVENT_GID_CHANGE] = "GID changed",
80 };
81
ib_event_msg(enum ib_event_type event)82 const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
83 {
84 size_t index = event;
85
86 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
87 ib_events[index] : "unrecognized event";
88 }
89 EXPORT_SYMBOL(ib_event_msg);
90
91 static const char * const wc_statuses[] = {
92 [IB_WC_SUCCESS] = "success",
93 [IB_WC_LOC_LEN_ERR] = "local length error",
94 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
95 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
96 [IB_WC_LOC_PROT_ERR] = "local protection error",
97 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
98 [IB_WC_MW_BIND_ERR] = "memory management operation error",
99 [IB_WC_BAD_RESP_ERR] = "bad response error",
100 [IB_WC_LOC_ACCESS_ERR] = "local access error",
101 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
102 [IB_WC_REM_ACCESS_ERR] = "remote access error",
103 [IB_WC_REM_OP_ERR] = "remote operation error",
104 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
105 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
106 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
107 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
108 [IB_WC_REM_ABORT_ERR] = "operation aborted",
109 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
110 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
111 [IB_WC_FATAL_ERR] = "fatal error",
112 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
113 [IB_WC_GENERAL_ERR] = "general error",
114 };
115
ib_wc_status_msg(enum ib_wc_status status)116 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
117 {
118 size_t index = status;
119
120 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
121 wc_statuses[index] : "unrecognized status";
122 }
123 EXPORT_SYMBOL(ib_wc_status_msg);
124
ib_rate_to_mult(enum ib_rate rate)125 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
126 {
127 switch (rate) {
128 case IB_RATE_2_5_GBPS: return 1;
129 case IB_RATE_5_GBPS: return 2;
130 case IB_RATE_10_GBPS: return 4;
131 case IB_RATE_20_GBPS: return 8;
132 case IB_RATE_30_GBPS: return 12;
133 case IB_RATE_40_GBPS: return 16;
134 case IB_RATE_60_GBPS: return 24;
135 case IB_RATE_80_GBPS: return 32;
136 case IB_RATE_120_GBPS: return 48;
137 case IB_RATE_14_GBPS: return 6;
138 case IB_RATE_56_GBPS: return 22;
139 case IB_RATE_112_GBPS: return 45;
140 case IB_RATE_168_GBPS: return 67;
141 case IB_RATE_25_GBPS: return 10;
142 case IB_RATE_100_GBPS: return 40;
143 case IB_RATE_200_GBPS: return 80;
144 case IB_RATE_300_GBPS: return 120;
145 case IB_RATE_28_GBPS: return 11;
146 case IB_RATE_50_GBPS: return 20;
147 case IB_RATE_400_GBPS: return 160;
148 case IB_RATE_600_GBPS: return 240;
149 default: return -1;
150 }
151 }
152 EXPORT_SYMBOL(ib_rate_to_mult);
153
mult_to_ib_rate(int mult)154 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
155 {
156 switch (mult) {
157 case 1: return IB_RATE_2_5_GBPS;
158 case 2: return IB_RATE_5_GBPS;
159 case 4: return IB_RATE_10_GBPS;
160 case 8: return IB_RATE_20_GBPS;
161 case 12: return IB_RATE_30_GBPS;
162 case 16: return IB_RATE_40_GBPS;
163 case 24: return IB_RATE_60_GBPS;
164 case 32: return IB_RATE_80_GBPS;
165 case 48: return IB_RATE_120_GBPS;
166 case 6: return IB_RATE_14_GBPS;
167 case 22: return IB_RATE_56_GBPS;
168 case 45: return IB_RATE_112_GBPS;
169 case 67: return IB_RATE_168_GBPS;
170 case 10: return IB_RATE_25_GBPS;
171 case 40: return IB_RATE_100_GBPS;
172 case 80: return IB_RATE_200_GBPS;
173 case 120: return IB_RATE_300_GBPS;
174 case 11: return IB_RATE_28_GBPS;
175 case 20: return IB_RATE_50_GBPS;
176 case 160: return IB_RATE_400_GBPS;
177 case 240: return IB_RATE_600_GBPS;
178 default: return IB_RATE_PORT_CURRENT;
179 }
180 }
181 EXPORT_SYMBOL(mult_to_ib_rate);
182
ib_rate_to_mbps(enum ib_rate rate)183 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
184 {
185 switch (rate) {
186 case IB_RATE_2_5_GBPS: return 2500;
187 case IB_RATE_5_GBPS: return 5000;
188 case IB_RATE_10_GBPS: return 10000;
189 case IB_RATE_20_GBPS: return 20000;
190 case IB_RATE_30_GBPS: return 30000;
191 case IB_RATE_40_GBPS: return 40000;
192 case IB_RATE_60_GBPS: return 60000;
193 case IB_RATE_80_GBPS: return 80000;
194 case IB_RATE_120_GBPS: return 120000;
195 case IB_RATE_14_GBPS: return 14062;
196 case IB_RATE_56_GBPS: return 56250;
197 case IB_RATE_112_GBPS: return 112500;
198 case IB_RATE_168_GBPS: return 168750;
199 case IB_RATE_25_GBPS: return 25781;
200 case IB_RATE_100_GBPS: return 103125;
201 case IB_RATE_200_GBPS: return 206250;
202 case IB_RATE_300_GBPS: return 309375;
203 case IB_RATE_28_GBPS: return 28125;
204 case IB_RATE_50_GBPS: return 53125;
205 case IB_RATE_400_GBPS: return 425000;
206 case IB_RATE_600_GBPS: return 637500;
207 default: return -1;
208 }
209 }
210 EXPORT_SYMBOL(ib_rate_to_mbps);
211
212 __attribute_const__ enum rdma_transport_type
rdma_node_get_transport(enum rdma_node_type node_type)213 rdma_node_get_transport(enum rdma_node_type node_type)
214 {
215 switch (node_type) {
216 case RDMA_NODE_IB_CA:
217 case RDMA_NODE_IB_SWITCH:
218 case RDMA_NODE_IB_ROUTER:
219 return RDMA_TRANSPORT_IB;
220 case RDMA_NODE_RNIC:
221 return RDMA_TRANSPORT_IWARP;
222 case RDMA_NODE_USNIC:
223 return RDMA_TRANSPORT_USNIC;
224 case RDMA_NODE_USNIC_UDP:
225 return RDMA_TRANSPORT_USNIC_UDP;
226 default:
227 BUG();
228 return 0;
229 }
230 }
231 EXPORT_SYMBOL(rdma_node_get_transport);
232
rdma_port_get_link_layer(struct ib_device * device,u8 port_num)233 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
234 {
235 if (device->get_link_layer)
236 return device->get_link_layer(device, port_num);
237
238 switch (rdma_node_get_transport(device->node_type)) {
239 case RDMA_TRANSPORT_IB:
240 return IB_LINK_LAYER_INFINIBAND;
241 case RDMA_TRANSPORT_IWARP:
242 case RDMA_TRANSPORT_USNIC:
243 case RDMA_TRANSPORT_USNIC_UDP:
244 return IB_LINK_LAYER_ETHERNET;
245 default:
246 return IB_LINK_LAYER_UNSPECIFIED;
247 }
248 }
249 EXPORT_SYMBOL(rdma_port_get_link_layer);
250
251 /* Protection domains */
252
253 /**
254 * ib_alloc_pd - Allocates an unused protection domain.
255 * @device: The device on which to allocate the protection domain.
256 *
257 * A protection domain object provides an association between QPs, shared
258 * receive queues, address handles, memory regions, and memory windows.
259 *
260 * Every PD has a local_dma_lkey which can be used as the lkey value for local
261 * memory operations.
262 */
__ib_alloc_pd(struct ib_device * device,unsigned int flags,const char * caller)263 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
264 const char *caller)
265 {
266 struct ib_pd *pd;
267 int mr_access_flags = 0;
268
269 pd = device->alloc_pd(device, NULL, NULL);
270 if (IS_ERR(pd))
271 return pd;
272
273 pd->device = device;
274 pd->uobject = NULL;
275 pd->__internal_mr = NULL;
276 atomic_set(&pd->usecnt, 0);
277 pd->flags = flags;
278
279 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
280 pd->local_dma_lkey = device->local_dma_lkey;
281 else
282 mr_access_flags |= IB_ACCESS_LOCAL_WRITE;
283
284 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
285 pr_warn("%s: enabling unsafe global rkey\n", caller);
286 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
287 }
288
289 if (mr_access_flags) {
290 struct ib_mr *mr;
291
292 mr = pd->device->get_dma_mr(pd, mr_access_flags);
293 if (IS_ERR(mr)) {
294 ib_dealloc_pd(pd);
295 return ERR_CAST(mr);
296 }
297
298 mr->device = pd->device;
299 mr->pd = pd;
300 mr->uobject = NULL;
301 mr->need_inval = false;
302
303 pd->__internal_mr = mr;
304
305 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY))
306 pd->local_dma_lkey = pd->__internal_mr->lkey;
307
308 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
309 pd->unsafe_global_rkey = pd->__internal_mr->rkey;
310 }
311
312 return pd;
313 }
314 EXPORT_SYMBOL(__ib_alloc_pd);
315
316 /**
317 * ib_dealloc_pd - Deallocates a protection domain.
318 * @pd: The protection domain to deallocate.
319 *
320 * It is an error to call this function while any resources in the pd still
321 * exist. The caller is responsible to synchronously destroy them and
322 * guarantee no new allocations will happen.
323 */
ib_dealloc_pd(struct ib_pd * pd)324 void ib_dealloc_pd(struct ib_pd *pd)
325 {
326 int ret;
327
328 if (pd->__internal_mr) {
329 ret = pd->device->dereg_mr(pd->__internal_mr);
330 WARN_ON(ret);
331 pd->__internal_mr = NULL;
332 }
333
334 /* uverbs manipulates usecnt with proper locking, while the kabi
335 requires the caller to guarantee we can't race here. */
336 WARN_ON(atomic_read(&pd->usecnt));
337
338 /* Making delalloc_pd a void return is a WIP, no driver should return
339 an error here. */
340 ret = pd->device->dealloc_pd(pd);
341 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
342 }
343 EXPORT_SYMBOL(ib_dealloc_pd);
344
345 /* Address handles */
346
ib_create_ah(struct ib_pd * pd,struct ib_ah_attr * ah_attr)347 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
348 {
349 struct ib_ah *ah;
350
351 ah = pd->device->create_ah(pd, ah_attr, NULL);
352
353 if (!IS_ERR(ah)) {
354 ah->device = pd->device;
355 ah->pd = pd;
356 ah->uobject = NULL;
357 atomic_inc(&pd->usecnt);
358 }
359
360 return ah;
361 }
362 EXPORT_SYMBOL(ib_create_ah);
363
ib_get_header_version(const union rdma_network_hdr * hdr)364 static int ib_get_header_version(const union rdma_network_hdr *hdr)
365 {
366 const struct ip *ip4h = (const struct ip *)&hdr->roce4grh;
367 struct ip ip4h_checked;
368 const struct ip6_hdr *ip6h = (const struct ip6_hdr *)&hdr->ibgrh;
369
370 /* If it's IPv6, the version must be 6, otherwise, the first
371 * 20 bytes (before the IPv4 header) are garbled.
372 */
373 if ((ip6h->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
374 return (ip4h->ip_v == 4) ? 4 : 0;
375 /* version may be 6 or 4 because the first 20 bytes could be garbled */
376
377 /* RoCE v2 requires no options, thus header length
378 * must be 5 words
379 */
380 if (ip4h->ip_hl != 5)
381 return 6;
382
383 /* Verify checksum.
384 * We can't write on scattered buffers so we need to copy to
385 * temp buffer.
386 */
387 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
388 ip4h_checked.ip_sum = 0;
389 #if defined(INET) || defined(INET6)
390 ip4h_checked.ip_sum = in_cksum_hdr(&ip4h_checked);
391 #endif
392 /* if IPv4 header checksum is OK, believe it */
393 if (ip4h->ip_sum == ip4h_checked.ip_sum)
394 return 4;
395 return 6;
396 }
397
ib_get_net_type_by_grh(struct ib_device * device,u8 port_num,const struct ib_grh * grh)398 static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
399 u8 port_num,
400 const struct ib_grh *grh)
401 {
402 int grh_version;
403
404 if (rdma_protocol_ib(device, port_num))
405 return RDMA_NETWORK_IB;
406
407 grh_version = ib_get_header_version((const union rdma_network_hdr *)grh);
408
409 if (grh_version == 4)
410 return RDMA_NETWORK_IPV4;
411
412 if (grh->next_hdr == IPPROTO_UDP)
413 return RDMA_NETWORK_IPV6;
414
415 return RDMA_NETWORK_ROCE_V1;
416 }
417
418 struct find_gid_index_context {
419 u16 vlan_id;
420 enum ib_gid_type gid_type;
421 };
422
423
424 /*
425 * This function will return true only if a inspected GID index
426 * matches the request based on the GID type and VLAN configuration
427 */
find_gid_index(const union ib_gid * gid,const struct ib_gid_attr * gid_attr,void * context)428 static bool find_gid_index(const union ib_gid *gid,
429 const struct ib_gid_attr *gid_attr,
430 void *context)
431 {
432 u16 vlan_diff;
433 struct find_gid_index_context *ctx =
434 (struct find_gid_index_context *)context;
435
436 if (ctx->gid_type != gid_attr->gid_type)
437 return false;
438
439 /*
440 * The following will verify:
441 * 1. VLAN ID matching for VLAN tagged requests.
442 * 2. prio-tagged/untagged to prio-tagged/untagged matching.
443 *
444 * This XOR is valid, since 0x0 < vlan_id < 0x0FFF.
445 */
446 vlan_diff = rdma_vlan_dev_vlan_id(gid_attr->ndev) ^ ctx->vlan_id;
447
448 return (vlan_diff == 0x0000 || vlan_diff == 0xFFFF);
449 }
450
get_sgid_index_from_eth(struct ib_device * device,u8 port_num,u16 vlan_id,const union ib_gid * sgid,enum ib_gid_type gid_type,u16 * gid_index)451 static int get_sgid_index_from_eth(struct ib_device *device, u8 port_num,
452 u16 vlan_id, const union ib_gid *sgid,
453 enum ib_gid_type gid_type,
454 u16 *gid_index)
455 {
456 struct find_gid_index_context context = {.vlan_id = vlan_id,
457 .gid_type = gid_type};
458
459 return ib_find_gid_by_filter(device, sgid, port_num, find_gid_index,
460 &context, gid_index);
461 }
462
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)463 static int get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
464 enum rdma_network_type net_type,
465 union ib_gid *sgid, union ib_gid *dgid)
466 {
467 struct sockaddr_in src_in;
468 struct sockaddr_in dst_in;
469 __be32 src_saddr, dst_saddr;
470
471 if (!sgid || !dgid)
472 return -EINVAL;
473
474 if (net_type == RDMA_NETWORK_IPV4) {
475 memcpy(&src_in.sin_addr.s_addr,
476 &hdr->roce4grh.ip_src, 4);
477 memcpy(&dst_in.sin_addr.s_addr,
478 &hdr->roce4grh.ip_dst, 4);
479 src_saddr = src_in.sin_addr.s_addr;
480 dst_saddr = dst_in.sin_addr.s_addr;
481 ipv6_addr_set_v4mapped(src_saddr,
482 (struct in6_addr *)sgid);
483 ipv6_addr_set_v4mapped(dst_saddr,
484 (struct in6_addr *)dgid);
485 return 0;
486 } else if (net_type == RDMA_NETWORK_IPV6 ||
487 net_type == RDMA_NETWORK_IB) {
488 *dgid = hdr->ibgrh.dgid;
489 *sgid = hdr->ibgrh.sgid;
490 return 0;
491 } else {
492 return -EINVAL;
493 }
494 }
495
ib_init_ah_from_wc(struct ib_device * device,u8 port_num,const struct ib_wc * wc,const struct ib_grh * grh,struct ib_ah_attr * ah_attr)496 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
497 const struct ib_wc *wc, const struct ib_grh *grh,
498 struct ib_ah_attr *ah_attr)
499 {
500 u32 flow_class;
501 u16 gid_index = 0;
502 int ret;
503 enum rdma_network_type net_type = RDMA_NETWORK_IB;
504 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
505 int hoplimit = 0xff;
506 union ib_gid dgid;
507 union ib_gid sgid;
508
509 memset(ah_attr, 0, sizeof *ah_attr);
510 if (rdma_cap_eth_ah(device, port_num)) {
511 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
512 net_type = wc->network_hdr_type;
513 else
514 net_type = ib_get_net_type_by_grh(device, port_num, grh);
515 gid_type = ib_network_to_gid_type(net_type);
516 }
517 ret = get_gids_from_rdma_hdr((const union rdma_network_hdr *)grh, net_type,
518 &sgid, &dgid);
519 if (ret)
520 return ret;
521
522 if (rdma_protocol_roce(device, port_num)) {
523 struct ib_gid_attr dgid_attr;
524 const u16 vlan_id = (wc->wc_flags & IB_WC_WITH_VLAN) ?
525 wc->vlan_id : 0xffff;
526
527 if (!(wc->wc_flags & IB_WC_GRH))
528 return -EPROTOTYPE;
529
530 ret = get_sgid_index_from_eth(device, port_num, vlan_id,
531 &dgid, gid_type, &gid_index);
532 if (ret)
533 return ret;
534
535 ret = ib_get_cached_gid(device, port_num, gid_index, &dgid, &dgid_attr);
536 if (ret)
537 return ret;
538
539 if (dgid_attr.ndev == NULL)
540 return -ENODEV;
541
542 ret = rdma_addr_find_l2_eth_by_grh(&dgid, &sgid, ah_attr->dmac,
543 dgid_attr.ndev, &hoplimit);
544
545 dev_put(dgid_attr.ndev);
546 if (ret)
547 return ret;
548 }
549
550 ah_attr->dlid = wc->slid;
551 ah_attr->sl = wc->sl;
552 ah_attr->src_path_bits = wc->dlid_path_bits;
553 ah_attr->port_num = port_num;
554
555 if (wc->wc_flags & IB_WC_GRH) {
556 ah_attr->ah_flags = IB_AH_GRH;
557 ah_attr->grh.dgid = sgid;
558
559 if (!rdma_cap_eth_ah(device, port_num)) {
560 if (dgid.global.interface_id != cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
561 ret = ib_find_cached_gid_by_port(device, &dgid,
562 IB_GID_TYPE_IB,
563 port_num, NULL,
564 &gid_index);
565 if (ret)
566 return ret;
567 }
568 }
569
570 ah_attr->grh.sgid_index = (u8) gid_index;
571 flow_class = be32_to_cpu(grh->version_tclass_flow);
572 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
573 ah_attr->grh.hop_limit = hoplimit;
574 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
575 }
576 return 0;
577 }
578 EXPORT_SYMBOL(ib_init_ah_from_wc);
579
ib_create_ah_from_wc(struct ib_pd * pd,const struct ib_wc * wc,const struct ib_grh * grh,u8 port_num)580 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
581 const struct ib_grh *grh, u8 port_num)
582 {
583 struct ib_ah_attr ah_attr;
584 int ret;
585
586 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
587 if (ret)
588 return ERR_PTR(ret);
589
590 return ib_create_ah(pd, &ah_attr);
591 }
592 EXPORT_SYMBOL(ib_create_ah_from_wc);
593
ib_modify_ah(struct ib_ah * ah,struct ib_ah_attr * ah_attr)594 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
595 {
596 return ah->device->modify_ah ?
597 ah->device->modify_ah(ah, ah_attr) :
598 -ENOSYS;
599 }
600 EXPORT_SYMBOL(ib_modify_ah);
601
ib_query_ah(struct ib_ah * ah,struct ib_ah_attr * ah_attr)602 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
603 {
604 return ah->device->query_ah ?
605 ah->device->query_ah(ah, ah_attr) :
606 -ENOSYS;
607 }
608 EXPORT_SYMBOL(ib_query_ah);
609
ib_destroy_ah(struct ib_ah * ah)610 int ib_destroy_ah(struct ib_ah *ah)
611 {
612 struct ib_pd *pd;
613 int ret;
614
615 pd = ah->pd;
616 ret = ah->device->destroy_ah(ah);
617 if (!ret)
618 atomic_dec(&pd->usecnt);
619
620 return ret;
621 }
622 EXPORT_SYMBOL(ib_destroy_ah);
623
624 /* Shared receive queues */
625
ib_create_srq(struct ib_pd * pd,struct ib_srq_init_attr * srq_init_attr)626 struct ib_srq *ib_create_srq(struct ib_pd *pd,
627 struct ib_srq_init_attr *srq_init_attr)
628 {
629 struct ib_srq *srq;
630
631 if (!pd->device->create_srq)
632 return ERR_PTR(-ENOSYS);
633
634 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
635
636 if (!IS_ERR(srq)) {
637 srq->device = pd->device;
638 srq->pd = pd;
639 srq->uobject = NULL;
640 srq->event_handler = srq_init_attr->event_handler;
641 srq->srq_context = srq_init_attr->srq_context;
642 srq->srq_type = srq_init_attr->srq_type;
643 if (srq->srq_type == IB_SRQT_XRC) {
644 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
645 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
646 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
647 atomic_inc(&srq->ext.xrc.cq->usecnt);
648 }
649 atomic_inc(&pd->usecnt);
650 atomic_set(&srq->usecnt, 0);
651 }
652
653 return srq;
654 }
655 EXPORT_SYMBOL(ib_create_srq);
656
ib_modify_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr,enum ib_srq_attr_mask srq_attr_mask)657 int ib_modify_srq(struct ib_srq *srq,
658 struct ib_srq_attr *srq_attr,
659 enum ib_srq_attr_mask srq_attr_mask)
660 {
661 return srq->device->modify_srq ?
662 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
663 -ENOSYS;
664 }
665 EXPORT_SYMBOL(ib_modify_srq);
666
ib_query_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr)667 int ib_query_srq(struct ib_srq *srq,
668 struct ib_srq_attr *srq_attr)
669 {
670 return srq->device->query_srq ?
671 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
672 }
673 EXPORT_SYMBOL(ib_query_srq);
674
ib_destroy_srq(struct ib_srq * srq)675 int ib_destroy_srq(struct ib_srq *srq)
676 {
677 struct ib_pd *pd;
678 enum ib_srq_type srq_type;
679 struct ib_xrcd *uninitialized_var(xrcd);
680 struct ib_cq *uninitialized_var(cq);
681 int ret;
682
683 if (atomic_read(&srq->usecnt))
684 return -EBUSY;
685
686 pd = srq->pd;
687 srq_type = srq->srq_type;
688 if (srq_type == IB_SRQT_XRC) {
689 xrcd = srq->ext.xrc.xrcd;
690 cq = srq->ext.xrc.cq;
691 }
692
693 ret = srq->device->destroy_srq(srq);
694 if (!ret) {
695 atomic_dec(&pd->usecnt);
696 if (srq_type == IB_SRQT_XRC) {
697 atomic_dec(&xrcd->usecnt);
698 atomic_dec(&cq->usecnt);
699 }
700 }
701
702 return ret;
703 }
704 EXPORT_SYMBOL(ib_destroy_srq);
705
706 /* Queue pairs */
707
__ib_shared_qp_event_handler(struct ib_event * event,void * context)708 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
709 {
710 struct ib_qp *qp = context;
711 unsigned long flags;
712
713 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
714 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
715 if (event->element.qp->event_handler)
716 event->element.qp->event_handler(event, event->element.qp->qp_context);
717 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
718 }
719
__ib_insert_xrcd_qp(struct ib_xrcd * xrcd,struct ib_qp * qp)720 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
721 {
722 mutex_lock(&xrcd->tgt_qp_mutex);
723 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
724 mutex_unlock(&xrcd->tgt_qp_mutex);
725 }
726
__ib_open_qp(struct ib_qp * real_qp,void (* event_handler)(struct ib_event *,void *),void * qp_context)727 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
728 void (*event_handler)(struct ib_event *, void *),
729 void *qp_context)
730 {
731 struct ib_qp *qp;
732 unsigned long flags;
733
734 qp = kzalloc(sizeof *qp, GFP_KERNEL);
735 if (!qp)
736 return ERR_PTR(-ENOMEM);
737
738 qp->real_qp = real_qp;
739 atomic_inc(&real_qp->usecnt);
740 qp->device = real_qp->device;
741 qp->event_handler = event_handler;
742 qp->qp_context = qp_context;
743 qp->qp_num = real_qp->qp_num;
744 qp->qp_type = real_qp->qp_type;
745
746 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
747 list_add(&qp->open_list, &real_qp->open_list);
748 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
749
750 return qp;
751 }
752
ib_open_qp(struct ib_xrcd * xrcd,struct ib_qp_open_attr * qp_open_attr)753 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
754 struct ib_qp_open_attr *qp_open_attr)
755 {
756 struct ib_qp *qp, *real_qp;
757
758 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
759 return ERR_PTR(-EINVAL);
760
761 qp = ERR_PTR(-EINVAL);
762 mutex_lock(&xrcd->tgt_qp_mutex);
763 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
764 if (real_qp->qp_num == qp_open_attr->qp_num) {
765 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
766 qp_open_attr->qp_context);
767 break;
768 }
769 }
770 mutex_unlock(&xrcd->tgt_qp_mutex);
771 return qp;
772 }
773 EXPORT_SYMBOL(ib_open_qp);
774
ib_create_xrc_qp(struct ib_qp * qp,struct ib_qp_init_attr * qp_init_attr)775 static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp,
776 struct ib_qp_init_attr *qp_init_attr)
777 {
778 struct ib_qp *real_qp = qp;
779
780 qp->event_handler = __ib_shared_qp_event_handler;
781 qp->qp_context = qp;
782 qp->pd = NULL;
783 qp->send_cq = qp->recv_cq = NULL;
784 qp->srq = NULL;
785 qp->xrcd = qp_init_attr->xrcd;
786 atomic_inc(&qp_init_attr->xrcd->usecnt);
787 INIT_LIST_HEAD(&qp->open_list);
788
789 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
790 qp_init_attr->qp_context);
791 if (!IS_ERR(qp))
792 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
793 else
794 real_qp->device->destroy_qp(real_qp);
795 return qp;
796 }
797
ib_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * qp_init_attr)798 struct ib_qp *ib_create_qp(struct ib_pd *pd,
799 struct ib_qp_init_attr *qp_init_attr)
800 {
801 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
802 struct ib_qp *qp;
803
804 if (qp_init_attr->rwq_ind_tbl &&
805 (qp_init_attr->recv_cq ||
806 qp_init_attr->srq || qp_init_attr->cap.max_recv_wr ||
807 qp_init_attr->cap.max_recv_sge))
808 return ERR_PTR(-EINVAL);
809
810 qp = device->create_qp(pd, qp_init_attr, NULL);
811 if (IS_ERR(qp))
812 return qp;
813
814 qp->device = device;
815 qp->real_qp = qp;
816 qp->uobject = NULL;
817 qp->qp_type = qp_init_attr->qp_type;
818 qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
819
820 atomic_set(&qp->usecnt, 0);
821 spin_lock_init(&qp->mr_lock);
822
823 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT)
824 return ib_create_xrc_qp(qp, qp_init_attr);
825
826 qp->event_handler = qp_init_attr->event_handler;
827 qp->qp_context = qp_init_attr->qp_context;
828 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
829 qp->recv_cq = NULL;
830 qp->srq = NULL;
831 } else {
832 qp->recv_cq = qp_init_attr->recv_cq;
833 if (qp_init_attr->recv_cq)
834 atomic_inc(&qp_init_attr->recv_cq->usecnt);
835 qp->srq = qp_init_attr->srq;
836 if (qp->srq)
837 atomic_inc(&qp_init_attr->srq->usecnt);
838 }
839
840 qp->pd = pd;
841 qp->send_cq = qp_init_attr->send_cq;
842 qp->xrcd = NULL;
843
844 atomic_inc(&pd->usecnt);
845 if (qp_init_attr->send_cq)
846 atomic_inc(&qp_init_attr->send_cq->usecnt);
847 if (qp_init_attr->rwq_ind_tbl)
848 atomic_inc(&qp->rwq_ind_tbl->usecnt);
849
850 /*
851 * Note: all hw drivers guarantee that max_send_sge is lower than
852 * the device RDMA WRITE SGE limit but not all hw drivers ensure that
853 * max_send_sge <= max_sge_rd.
854 */
855 qp->max_write_sge = qp_init_attr->cap.max_send_sge;
856 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,
857 device->attrs.max_sge_rd);
858
859 return qp;
860 }
861 EXPORT_SYMBOL(ib_create_qp);
862
863 static const struct {
864 int valid;
865 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
866 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
867 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
868 [IB_QPS_RESET] = {
869 [IB_QPS_RESET] = { .valid = 1 },
870 [IB_QPS_INIT] = {
871 .valid = 1,
872 .req_param = {
873 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
874 IB_QP_PORT |
875 IB_QP_QKEY),
876 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
877 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
878 IB_QP_PORT |
879 IB_QP_ACCESS_FLAGS),
880 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
881 IB_QP_PORT |
882 IB_QP_ACCESS_FLAGS),
883 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
884 IB_QP_PORT |
885 IB_QP_ACCESS_FLAGS),
886 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
887 IB_QP_PORT |
888 IB_QP_ACCESS_FLAGS),
889 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
890 IB_QP_QKEY),
891 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
892 IB_QP_QKEY),
893 }
894 },
895 },
896 [IB_QPS_INIT] = {
897 [IB_QPS_RESET] = { .valid = 1 },
898 [IB_QPS_ERR] = { .valid = 1 },
899 [IB_QPS_INIT] = {
900 .valid = 1,
901 .opt_param = {
902 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
903 IB_QP_PORT |
904 IB_QP_QKEY),
905 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
906 IB_QP_PORT |
907 IB_QP_ACCESS_FLAGS),
908 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
909 IB_QP_PORT |
910 IB_QP_ACCESS_FLAGS),
911 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
912 IB_QP_PORT |
913 IB_QP_ACCESS_FLAGS),
914 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
915 IB_QP_PORT |
916 IB_QP_ACCESS_FLAGS),
917 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
918 IB_QP_QKEY),
919 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
920 IB_QP_QKEY),
921 }
922 },
923 [IB_QPS_RTR] = {
924 .valid = 1,
925 .req_param = {
926 [IB_QPT_UC] = (IB_QP_AV |
927 IB_QP_PATH_MTU |
928 IB_QP_DEST_QPN |
929 IB_QP_RQ_PSN),
930 [IB_QPT_RC] = (IB_QP_AV |
931 IB_QP_PATH_MTU |
932 IB_QP_DEST_QPN |
933 IB_QP_RQ_PSN |
934 IB_QP_MAX_DEST_RD_ATOMIC |
935 IB_QP_MIN_RNR_TIMER),
936 [IB_QPT_XRC_INI] = (IB_QP_AV |
937 IB_QP_PATH_MTU |
938 IB_QP_DEST_QPN |
939 IB_QP_RQ_PSN),
940 [IB_QPT_XRC_TGT] = (IB_QP_AV |
941 IB_QP_PATH_MTU |
942 IB_QP_DEST_QPN |
943 IB_QP_RQ_PSN |
944 IB_QP_MAX_DEST_RD_ATOMIC |
945 IB_QP_MIN_RNR_TIMER),
946 },
947 .opt_param = {
948 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
949 IB_QP_QKEY),
950 [IB_QPT_UC] = (IB_QP_ALT_PATH |
951 IB_QP_ACCESS_FLAGS |
952 IB_QP_PKEY_INDEX),
953 [IB_QPT_RC] = (IB_QP_ALT_PATH |
954 IB_QP_ACCESS_FLAGS |
955 IB_QP_PKEY_INDEX),
956 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
957 IB_QP_ACCESS_FLAGS |
958 IB_QP_PKEY_INDEX),
959 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
960 IB_QP_ACCESS_FLAGS |
961 IB_QP_PKEY_INDEX),
962 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
963 IB_QP_QKEY),
964 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
965 IB_QP_QKEY),
966 },
967 },
968 },
969 [IB_QPS_RTR] = {
970 [IB_QPS_RESET] = { .valid = 1 },
971 [IB_QPS_ERR] = { .valid = 1 },
972 [IB_QPS_RTS] = {
973 .valid = 1,
974 .req_param = {
975 [IB_QPT_UD] = IB_QP_SQ_PSN,
976 [IB_QPT_UC] = IB_QP_SQ_PSN,
977 [IB_QPT_RC] = (IB_QP_TIMEOUT |
978 IB_QP_RETRY_CNT |
979 IB_QP_RNR_RETRY |
980 IB_QP_SQ_PSN |
981 IB_QP_MAX_QP_RD_ATOMIC),
982 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
983 IB_QP_RETRY_CNT |
984 IB_QP_RNR_RETRY |
985 IB_QP_SQ_PSN |
986 IB_QP_MAX_QP_RD_ATOMIC),
987 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
988 IB_QP_SQ_PSN),
989 [IB_QPT_SMI] = IB_QP_SQ_PSN,
990 [IB_QPT_GSI] = IB_QP_SQ_PSN,
991 },
992 .opt_param = {
993 [IB_QPT_UD] = (IB_QP_CUR_STATE |
994 IB_QP_QKEY),
995 [IB_QPT_UC] = (IB_QP_CUR_STATE |
996 IB_QP_ALT_PATH |
997 IB_QP_ACCESS_FLAGS |
998 IB_QP_PATH_MIG_STATE),
999 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1000 IB_QP_ALT_PATH |
1001 IB_QP_ACCESS_FLAGS |
1002 IB_QP_MIN_RNR_TIMER |
1003 IB_QP_PATH_MIG_STATE),
1004 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1005 IB_QP_ALT_PATH |
1006 IB_QP_ACCESS_FLAGS |
1007 IB_QP_PATH_MIG_STATE),
1008 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1009 IB_QP_ALT_PATH |
1010 IB_QP_ACCESS_FLAGS |
1011 IB_QP_MIN_RNR_TIMER |
1012 IB_QP_PATH_MIG_STATE),
1013 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1014 IB_QP_QKEY),
1015 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1016 IB_QP_QKEY),
1017 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1018 }
1019 }
1020 },
1021 [IB_QPS_RTS] = {
1022 [IB_QPS_RESET] = { .valid = 1 },
1023 [IB_QPS_ERR] = { .valid = 1 },
1024 [IB_QPS_RTS] = {
1025 .valid = 1,
1026 .opt_param = {
1027 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1028 IB_QP_QKEY),
1029 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1030 IB_QP_ACCESS_FLAGS |
1031 IB_QP_ALT_PATH |
1032 IB_QP_PATH_MIG_STATE),
1033 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1034 IB_QP_ACCESS_FLAGS |
1035 IB_QP_ALT_PATH |
1036 IB_QP_PATH_MIG_STATE |
1037 IB_QP_MIN_RNR_TIMER),
1038 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1039 IB_QP_ACCESS_FLAGS |
1040 IB_QP_ALT_PATH |
1041 IB_QP_PATH_MIG_STATE),
1042 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1043 IB_QP_ACCESS_FLAGS |
1044 IB_QP_ALT_PATH |
1045 IB_QP_PATH_MIG_STATE |
1046 IB_QP_MIN_RNR_TIMER),
1047 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1048 IB_QP_QKEY),
1049 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1050 IB_QP_QKEY),
1051 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1052 }
1053 },
1054 [IB_QPS_SQD] = {
1055 .valid = 1,
1056 .opt_param = {
1057 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1058 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1059 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1060 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1061 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
1062 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1063 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
1064 }
1065 },
1066 },
1067 [IB_QPS_SQD] = {
1068 [IB_QPS_RESET] = { .valid = 1 },
1069 [IB_QPS_ERR] = { .valid = 1 },
1070 [IB_QPS_RTS] = {
1071 .valid = 1,
1072 .opt_param = {
1073 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1074 IB_QP_QKEY),
1075 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1076 IB_QP_ALT_PATH |
1077 IB_QP_ACCESS_FLAGS |
1078 IB_QP_PATH_MIG_STATE),
1079 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1080 IB_QP_ALT_PATH |
1081 IB_QP_ACCESS_FLAGS |
1082 IB_QP_MIN_RNR_TIMER |
1083 IB_QP_PATH_MIG_STATE),
1084 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1085 IB_QP_ALT_PATH |
1086 IB_QP_ACCESS_FLAGS |
1087 IB_QP_PATH_MIG_STATE),
1088 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1089 IB_QP_ALT_PATH |
1090 IB_QP_ACCESS_FLAGS |
1091 IB_QP_MIN_RNR_TIMER |
1092 IB_QP_PATH_MIG_STATE),
1093 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1094 IB_QP_QKEY),
1095 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1096 IB_QP_QKEY),
1097 }
1098 },
1099 [IB_QPS_SQD] = {
1100 .valid = 1,
1101 .opt_param = {
1102 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1103 IB_QP_QKEY),
1104 [IB_QPT_UC] = (IB_QP_AV |
1105 IB_QP_ALT_PATH |
1106 IB_QP_ACCESS_FLAGS |
1107 IB_QP_PKEY_INDEX |
1108 IB_QP_PATH_MIG_STATE),
1109 [IB_QPT_RC] = (IB_QP_PORT |
1110 IB_QP_AV |
1111 IB_QP_TIMEOUT |
1112 IB_QP_RETRY_CNT |
1113 IB_QP_RNR_RETRY |
1114 IB_QP_MAX_QP_RD_ATOMIC |
1115 IB_QP_MAX_DEST_RD_ATOMIC |
1116 IB_QP_ALT_PATH |
1117 IB_QP_ACCESS_FLAGS |
1118 IB_QP_PKEY_INDEX |
1119 IB_QP_MIN_RNR_TIMER |
1120 IB_QP_PATH_MIG_STATE),
1121 [IB_QPT_XRC_INI] = (IB_QP_PORT |
1122 IB_QP_AV |
1123 IB_QP_TIMEOUT |
1124 IB_QP_RETRY_CNT |
1125 IB_QP_RNR_RETRY |
1126 IB_QP_MAX_QP_RD_ATOMIC |
1127 IB_QP_ALT_PATH |
1128 IB_QP_ACCESS_FLAGS |
1129 IB_QP_PKEY_INDEX |
1130 IB_QP_PATH_MIG_STATE),
1131 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
1132 IB_QP_AV |
1133 IB_QP_TIMEOUT |
1134 IB_QP_MAX_DEST_RD_ATOMIC |
1135 IB_QP_ALT_PATH |
1136 IB_QP_ACCESS_FLAGS |
1137 IB_QP_PKEY_INDEX |
1138 IB_QP_MIN_RNR_TIMER |
1139 IB_QP_PATH_MIG_STATE),
1140 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1141 IB_QP_QKEY),
1142 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1143 IB_QP_QKEY),
1144 }
1145 }
1146 },
1147 [IB_QPS_SQE] = {
1148 [IB_QPS_RESET] = { .valid = 1 },
1149 [IB_QPS_ERR] = { .valid = 1 },
1150 [IB_QPS_RTS] = {
1151 .valid = 1,
1152 .opt_param = {
1153 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1154 IB_QP_QKEY),
1155 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1156 IB_QP_ACCESS_FLAGS),
1157 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1158 IB_QP_QKEY),
1159 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1160 IB_QP_QKEY),
1161 }
1162 }
1163 },
1164 [IB_QPS_ERR] = {
1165 [IB_QPS_RESET] = { .valid = 1 },
1166 [IB_QPS_ERR] = { .valid = 1 }
1167 }
1168 };
1169
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)1170 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1171 enum ib_qp_type type, enum ib_qp_attr_mask mask)
1172 {
1173 enum ib_qp_attr_mask req_param, opt_param;
1174
1175 if (mask & IB_QP_CUR_STATE &&
1176 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
1177 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
1178 return false;
1179
1180 if (!qp_state_table[cur_state][next_state].valid)
1181 return false;
1182
1183 req_param = qp_state_table[cur_state][next_state].req_param[type];
1184 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
1185
1186 if ((mask & req_param) != req_param)
1187 return false;
1188
1189 if (mask & ~(req_param | opt_param | IB_QP_STATE))
1190 return false;
1191
1192 return true;
1193 }
1194 EXPORT_SYMBOL(ib_modify_qp_is_ok);
1195
ib_resolve_eth_dmac(struct ib_device * device,struct ib_ah_attr * ah_attr)1196 int ib_resolve_eth_dmac(struct ib_device *device,
1197 struct ib_ah_attr *ah_attr)
1198 {
1199 struct ib_gid_attr sgid_attr;
1200 union ib_gid sgid;
1201 int hop_limit;
1202 int ret;
1203
1204 if (ah_attr->port_num < rdma_start_port(device) ||
1205 ah_attr->port_num > rdma_end_port(device))
1206 return -EINVAL;
1207
1208 if (!rdma_cap_eth_ah(device, ah_attr->port_num))
1209 return 0;
1210
1211 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1212 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1213 __be32 addr = 0;
1214
1215 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
1216 ip_eth_mc_map(addr, (char *)ah_attr->dmac);
1217 } else {
1218 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
1219 (char *)ah_attr->dmac);
1220 }
1221 return 0;
1222 }
1223
1224 ret = ib_query_gid(device,
1225 ah_attr->port_num,
1226 ah_attr->grh.sgid_index,
1227 &sgid, &sgid_attr);
1228 if (ret != 0)
1229 return (ret);
1230 if (!sgid_attr.ndev)
1231 return -ENXIO;
1232
1233 ret = rdma_addr_find_l2_eth_by_grh(&sgid,
1234 &ah_attr->grh.dgid,
1235 ah_attr->dmac,
1236 sgid_attr.ndev, &hop_limit);
1237 dev_put(sgid_attr.ndev);
1238
1239 ah_attr->grh.hop_limit = hop_limit;
1240 return ret;
1241 }
1242 EXPORT_SYMBOL(ib_resolve_eth_dmac);
1243
1244
ib_modify_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask)1245 int ib_modify_qp(struct ib_qp *qp,
1246 struct ib_qp_attr *qp_attr,
1247 int qp_attr_mask)
1248 {
1249 if (qp_attr_mask & IB_QP_AV) {
1250 int ret;
1251
1252 ret = ib_resolve_eth_dmac(qp->device, &qp_attr->ah_attr);
1253 if (ret)
1254 return ret;
1255 }
1256
1257 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1258 }
1259 EXPORT_SYMBOL(ib_modify_qp);
1260
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)1261 int ib_query_qp(struct ib_qp *qp,
1262 struct ib_qp_attr *qp_attr,
1263 int qp_attr_mask,
1264 struct ib_qp_init_attr *qp_init_attr)
1265 {
1266 return qp->device->query_qp ?
1267 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1268 -ENOSYS;
1269 }
1270 EXPORT_SYMBOL(ib_query_qp);
1271
ib_close_qp(struct ib_qp * qp)1272 int ib_close_qp(struct ib_qp *qp)
1273 {
1274 struct ib_qp *real_qp;
1275 unsigned long flags;
1276
1277 real_qp = qp->real_qp;
1278 if (real_qp == qp)
1279 return -EINVAL;
1280
1281 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1282 list_del(&qp->open_list);
1283 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1284
1285 atomic_dec(&real_qp->usecnt);
1286 kfree(qp);
1287
1288 return 0;
1289 }
1290 EXPORT_SYMBOL(ib_close_qp);
1291
__ib_destroy_shared_qp(struct ib_qp * qp)1292 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1293 {
1294 struct ib_xrcd *xrcd;
1295 struct ib_qp *real_qp;
1296 int ret;
1297
1298 real_qp = qp->real_qp;
1299 xrcd = real_qp->xrcd;
1300
1301 mutex_lock(&xrcd->tgt_qp_mutex);
1302 ib_close_qp(qp);
1303 if (atomic_read(&real_qp->usecnt) == 0)
1304 list_del(&real_qp->xrcd_list);
1305 else
1306 real_qp = NULL;
1307 mutex_unlock(&xrcd->tgt_qp_mutex);
1308
1309 if (real_qp) {
1310 ret = ib_destroy_qp(real_qp);
1311 if (!ret)
1312 atomic_dec(&xrcd->usecnt);
1313 else
1314 __ib_insert_xrcd_qp(xrcd, real_qp);
1315 }
1316
1317 return 0;
1318 }
1319
ib_destroy_qp(struct ib_qp * qp)1320 int ib_destroy_qp(struct ib_qp *qp)
1321 {
1322 struct ib_pd *pd;
1323 struct ib_cq *scq, *rcq;
1324 struct ib_srq *srq;
1325 struct ib_rwq_ind_table *ind_tbl;
1326 int ret;
1327
1328 if (atomic_read(&qp->usecnt))
1329 return -EBUSY;
1330
1331 if (qp->real_qp != qp)
1332 return __ib_destroy_shared_qp(qp);
1333
1334 pd = qp->pd;
1335 scq = qp->send_cq;
1336 rcq = qp->recv_cq;
1337 srq = qp->srq;
1338 ind_tbl = qp->rwq_ind_tbl;
1339
1340 ret = qp->device->destroy_qp(qp);
1341 if (!ret) {
1342 if (pd)
1343 atomic_dec(&pd->usecnt);
1344 if (scq)
1345 atomic_dec(&scq->usecnt);
1346 if (rcq)
1347 atomic_dec(&rcq->usecnt);
1348 if (srq)
1349 atomic_dec(&srq->usecnt);
1350 if (ind_tbl)
1351 atomic_dec(&ind_tbl->usecnt);
1352 }
1353
1354 return ret;
1355 }
1356 EXPORT_SYMBOL(ib_destroy_qp);
1357
1358 /* Completion queues */
1359
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)1360 struct ib_cq *ib_create_cq(struct ib_device *device,
1361 ib_comp_handler comp_handler,
1362 void (*event_handler)(struct ib_event *, void *),
1363 void *cq_context,
1364 const struct ib_cq_init_attr *cq_attr)
1365 {
1366 struct ib_cq *cq;
1367
1368 cq = device->create_cq(device, cq_attr, NULL, NULL);
1369
1370 if (!IS_ERR(cq)) {
1371 cq->device = device;
1372 cq->uobject = NULL;
1373 cq->comp_handler = comp_handler;
1374 cq->event_handler = event_handler;
1375 cq->cq_context = cq_context;
1376 atomic_set(&cq->usecnt, 0);
1377 }
1378
1379 return cq;
1380 }
1381 EXPORT_SYMBOL(ib_create_cq);
1382
ib_modify_cq(struct ib_cq * cq,u16 cq_count,u16 cq_period)1383 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1384 {
1385 return cq->device->modify_cq ?
1386 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1387 }
1388 EXPORT_SYMBOL(ib_modify_cq);
1389
ib_destroy_cq(struct ib_cq * cq)1390 int ib_destroy_cq(struct ib_cq *cq)
1391 {
1392 if (atomic_read(&cq->usecnt))
1393 return -EBUSY;
1394
1395 return cq->device->destroy_cq(cq);
1396 }
1397 EXPORT_SYMBOL(ib_destroy_cq);
1398
ib_resize_cq(struct ib_cq * cq,int cqe)1399 int ib_resize_cq(struct ib_cq *cq, int cqe)
1400 {
1401 return cq->device->resize_cq ?
1402 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1403 }
1404 EXPORT_SYMBOL(ib_resize_cq);
1405
1406 /* Memory regions */
1407
ib_dereg_mr(struct ib_mr * mr)1408 int ib_dereg_mr(struct ib_mr *mr)
1409 {
1410 struct ib_pd *pd = mr->pd;
1411 int ret;
1412
1413 ret = mr->device->dereg_mr(mr);
1414 if (!ret)
1415 atomic_dec(&pd->usecnt);
1416
1417 return ret;
1418 }
1419 EXPORT_SYMBOL(ib_dereg_mr);
1420
1421 /**
1422 * ib_alloc_mr() - Allocates a memory region
1423 * @pd: protection domain associated with the region
1424 * @mr_type: memory region type
1425 * @max_num_sg: maximum sg entries available for registration.
1426 *
1427 * Notes:
1428 * Memory registeration page/sg lists must not exceed max_num_sg.
1429 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1430 * max_num_sg * used_page_size.
1431 *
1432 */
ib_alloc_mr(struct ib_pd * pd,enum ib_mr_type mr_type,u32 max_num_sg)1433 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1434 enum ib_mr_type mr_type,
1435 u32 max_num_sg)
1436 {
1437 struct ib_mr *mr;
1438
1439 if (!pd->device->alloc_mr)
1440 return ERR_PTR(-ENOSYS);
1441
1442 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1443 if (!IS_ERR(mr)) {
1444 mr->device = pd->device;
1445 mr->pd = pd;
1446 mr->uobject = NULL;
1447 atomic_inc(&pd->usecnt);
1448 mr->need_inval = false;
1449 }
1450
1451 return mr;
1452 }
1453 EXPORT_SYMBOL(ib_alloc_mr);
1454
1455 /* "Fast" memory regions */
1456
ib_alloc_fmr(struct ib_pd * pd,int mr_access_flags,struct ib_fmr_attr * fmr_attr)1457 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1458 int mr_access_flags,
1459 struct ib_fmr_attr *fmr_attr)
1460 {
1461 struct ib_fmr *fmr;
1462
1463 if (!pd->device->alloc_fmr)
1464 return ERR_PTR(-ENOSYS);
1465
1466 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1467 if (!IS_ERR(fmr)) {
1468 fmr->device = pd->device;
1469 fmr->pd = pd;
1470 atomic_inc(&pd->usecnt);
1471 }
1472
1473 return fmr;
1474 }
1475 EXPORT_SYMBOL(ib_alloc_fmr);
1476
ib_unmap_fmr(struct list_head * fmr_list)1477 int ib_unmap_fmr(struct list_head *fmr_list)
1478 {
1479 struct ib_fmr *fmr;
1480
1481 if (list_empty(fmr_list))
1482 return 0;
1483
1484 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1485 return fmr->device->unmap_fmr(fmr_list);
1486 }
1487 EXPORT_SYMBOL(ib_unmap_fmr);
1488
ib_dealloc_fmr(struct ib_fmr * fmr)1489 int ib_dealloc_fmr(struct ib_fmr *fmr)
1490 {
1491 struct ib_pd *pd;
1492 int ret;
1493
1494 pd = fmr->pd;
1495 ret = fmr->device->dealloc_fmr(fmr);
1496 if (!ret)
1497 atomic_dec(&pd->usecnt);
1498
1499 return ret;
1500 }
1501 EXPORT_SYMBOL(ib_dealloc_fmr);
1502
1503 /* Multicast groups */
1504
is_valid_mcast_lid(struct ib_qp * qp,u16 lid)1505 static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
1506 {
1507 struct ib_qp_init_attr init_attr = {};
1508 struct ib_qp_attr attr = {};
1509 int num_eth_ports = 0;
1510 int port;
1511
1512 /* If QP state >= init, it is assigned to a port and we can check this
1513 * port only.
1514 */
1515 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
1516 if (attr.qp_state >= IB_QPS_INIT) {
1517 if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
1518 IB_LINK_LAYER_INFINIBAND)
1519 return true;
1520 goto lid_check;
1521 }
1522 }
1523
1524 /* Can't get a quick answer, iterate over all ports */
1525 for (port = 0; port < qp->device->phys_port_cnt; port++)
1526 if (rdma_port_get_link_layer(qp->device, port) !=
1527 IB_LINK_LAYER_INFINIBAND)
1528 num_eth_ports++;
1529
1530 /* If we have at lease one Ethernet port, RoCE annex declares that
1531 * multicast LID should be ignored. We can't tell at this step if the
1532 * QP belongs to an IB or Ethernet port.
1533 */
1534 if (num_eth_ports)
1535 return true;
1536
1537 /* If all the ports are IB, we can check according to IB spec. */
1538 lid_check:
1539 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
1540 lid == be16_to_cpu(IB_LID_PERMISSIVE));
1541 }
1542
ib_attach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)1543 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1544 {
1545 int ret;
1546
1547 if (!qp->device->attach_mcast)
1548 return -ENOSYS;
1549
1550 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
1551 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
1552 return -EINVAL;
1553
1554 ret = qp->device->attach_mcast(qp, gid, lid);
1555 if (!ret)
1556 atomic_inc(&qp->usecnt);
1557 return ret;
1558 }
1559 EXPORT_SYMBOL(ib_attach_mcast);
1560
ib_detach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)1561 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1562 {
1563 int ret;
1564
1565 if (!qp->device->detach_mcast)
1566 return -ENOSYS;
1567
1568 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
1569 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
1570 return -EINVAL;
1571
1572 ret = qp->device->detach_mcast(qp, gid, lid);
1573 if (!ret)
1574 atomic_dec(&qp->usecnt);
1575 return ret;
1576 }
1577 EXPORT_SYMBOL(ib_detach_mcast);
1578
ib_alloc_xrcd(struct ib_device * device)1579 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1580 {
1581 struct ib_xrcd *xrcd;
1582
1583 if (!device->alloc_xrcd)
1584 return ERR_PTR(-ENOSYS);
1585
1586 xrcd = device->alloc_xrcd(device, NULL, NULL);
1587 if (!IS_ERR(xrcd)) {
1588 xrcd->device = device;
1589 xrcd->inode = NULL;
1590 atomic_set(&xrcd->usecnt, 0);
1591 mutex_init(&xrcd->tgt_qp_mutex);
1592 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1593 }
1594
1595 return xrcd;
1596 }
1597 EXPORT_SYMBOL(ib_alloc_xrcd);
1598
ib_dealloc_xrcd(struct ib_xrcd * xrcd)1599 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1600 {
1601 struct ib_qp *qp;
1602 int ret;
1603
1604 if (atomic_read(&xrcd->usecnt))
1605 return -EBUSY;
1606
1607 while (!list_empty(&xrcd->tgt_qp_list)) {
1608 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1609 ret = ib_destroy_qp(qp);
1610 if (ret)
1611 return ret;
1612 }
1613
1614 return xrcd->device->dealloc_xrcd(xrcd);
1615 }
1616 EXPORT_SYMBOL(ib_dealloc_xrcd);
1617
1618 /**
1619 * ib_create_wq - Creates a WQ associated with the specified protection
1620 * domain.
1621 * @pd: The protection domain associated with the WQ.
1622 * @wq_init_attr: A list of initial attributes required to create the
1623 * WQ. If WQ creation succeeds, then the attributes are updated to
1624 * the actual capabilities of the created WQ.
1625 *
1626 * wq_init_attr->max_wr and wq_init_attr->max_sge determine
1627 * the requested size of the WQ, and set to the actual values allocated
1628 * on return.
1629 * If ib_create_wq() succeeds, then max_wr and max_sge will always be
1630 * at least as large as the requested values.
1631 */
ib_create_wq(struct ib_pd * pd,struct ib_wq_init_attr * wq_attr)1632 struct ib_wq *ib_create_wq(struct ib_pd *pd,
1633 struct ib_wq_init_attr *wq_attr)
1634 {
1635 struct ib_wq *wq;
1636
1637 if (!pd->device->create_wq)
1638 return ERR_PTR(-ENOSYS);
1639
1640 wq = pd->device->create_wq(pd, wq_attr, NULL);
1641 if (!IS_ERR(wq)) {
1642 wq->event_handler = wq_attr->event_handler;
1643 wq->wq_context = wq_attr->wq_context;
1644 wq->wq_type = wq_attr->wq_type;
1645 wq->cq = wq_attr->cq;
1646 wq->device = pd->device;
1647 wq->pd = pd;
1648 wq->uobject = NULL;
1649 atomic_inc(&pd->usecnt);
1650 atomic_inc(&wq_attr->cq->usecnt);
1651 atomic_set(&wq->usecnt, 0);
1652 }
1653 return wq;
1654 }
1655 EXPORT_SYMBOL(ib_create_wq);
1656
1657 /**
1658 * ib_destroy_wq - Destroys the specified WQ.
1659 * @wq: The WQ to destroy.
1660 */
ib_destroy_wq(struct ib_wq * wq)1661 int ib_destroy_wq(struct ib_wq *wq)
1662 {
1663 int err;
1664 struct ib_cq *cq = wq->cq;
1665 struct ib_pd *pd = wq->pd;
1666
1667 if (atomic_read(&wq->usecnt))
1668 return -EBUSY;
1669
1670 err = wq->device->destroy_wq(wq);
1671 if (!err) {
1672 atomic_dec(&pd->usecnt);
1673 atomic_dec(&cq->usecnt);
1674 }
1675 return err;
1676 }
1677 EXPORT_SYMBOL(ib_destroy_wq);
1678
1679 /**
1680 * ib_modify_wq - Modifies the specified WQ.
1681 * @wq: The WQ to modify.
1682 * @wq_attr: On input, specifies the WQ attributes to modify.
1683 * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
1684 * are being modified.
1685 * On output, the current values of selected WQ attributes are returned.
1686 */
ib_modify_wq(struct ib_wq * wq,struct ib_wq_attr * wq_attr,u32 wq_attr_mask)1687 int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
1688 u32 wq_attr_mask)
1689 {
1690 int err;
1691
1692 if (!wq->device->modify_wq)
1693 return -ENOSYS;
1694
1695 err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL);
1696 return err;
1697 }
1698 EXPORT_SYMBOL(ib_modify_wq);
1699
1700 /*
1701 * ib_create_rwq_ind_table - Creates a RQ Indirection Table.
1702 * @device: The device on which to create the rwq indirection table.
1703 * @ib_rwq_ind_table_init_attr: A list of initial attributes required to
1704 * create the Indirection Table.
1705 *
1706 * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
1707 * than the created ib_rwq_ind_table object and the caller is responsible
1708 * for its memory allocation/free.
1709 */
ib_create_rwq_ind_table(struct ib_device * device,struct ib_rwq_ind_table_init_attr * init_attr)1710 struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
1711 struct ib_rwq_ind_table_init_attr *init_attr)
1712 {
1713 struct ib_rwq_ind_table *rwq_ind_table;
1714 int i;
1715 u32 table_size;
1716
1717 if (!device->create_rwq_ind_table)
1718 return ERR_PTR(-ENOSYS);
1719
1720 table_size = (1 << init_attr->log_ind_tbl_size);
1721 rwq_ind_table = device->create_rwq_ind_table(device,
1722 init_attr, NULL);
1723 if (IS_ERR(rwq_ind_table))
1724 return rwq_ind_table;
1725
1726 rwq_ind_table->ind_tbl = init_attr->ind_tbl;
1727 rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size;
1728 rwq_ind_table->device = device;
1729 rwq_ind_table->uobject = NULL;
1730 atomic_set(&rwq_ind_table->usecnt, 0);
1731
1732 for (i = 0; i < table_size; i++)
1733 atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt);
1734
1735 return rwq_ind_table;
1736 }
1737 EXPORT_SYMBOL(ib_create_rwq_ind_table);
1738
1739 /*
1740 * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
1741 * @wq_ind_table: The Indirection Table to destroy.
1742 */
ib_destroy_rwq_ind_table(struct ib_rwq_ind_table * rwq_ind_table)1743 int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table)
1744 {
1745 int err, i;
1746 u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size);
1747 struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl;
1748
1749 if (atomic_read(&rwq_ind_table->usecnt))
1750 return -EBUSY;
1751
1752 err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table);
1753 if (!err) {
1754 for (i = 0; i < table_size; i++)
1755 atomic_dec(&ind_tbl[i]->usecnt);
1756 }
1757
1758 return err;
1759 }
1760 EXPORT_SYMBOL(ib_destroy_rwq_ind_table);
1761
ib_create_flow(struct ib_qp * qp,struct ib_flow_attr * flow_attr,int domain)1762 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1763 struct ib_flow_attr *flow_attr,
1764 int domain)
1765 {
1766 struct ib_flow *flow_id;
1767 if (!qp->device->create_flow)
1768 return ERR_PTR(-ENOSYS);
1769
1770 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1771 if (!IS_ERR(flow_id))
1772 atomic_inc(&qp->usecnt);
1773 return flow_id;
1774 }
1775 EXPORT_SYMBOL(ib_create_flow);
1776
ib_destroy_flow(struct ib_flow * flow_id)1777 int ib_destroy_flow(struct ib_flow *flow_id)
1778 {
1779 int err;
1780 struct ib_qp *qp = flow_id->qp;
1781
1782 err = qp->device->destroy_flow(flow_id);
1783 if (!err)
1784 atomic_dec(&qp->usecnt);
1785 return err;
1786 }
1787 EXPORT_SYMBOL(ib_destroy_flow);
1788
ib_check_mr_status(struct ib_mr * mr,u32 check_mask,struct ib_mr_status * mr_status)1789 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1790 struct ib_mr_status *mr_status)
1791 {
1792 return mr->device->check_mr_status ?
1793 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1794 }
1795 EXPORT_SYMBOL(ib_check_mr_status);
1796
ib_set_vf_link_state(struct ib_device * device,int vf,u8 port,int state)1797 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
1798 int state)
1799 {
1800 if (!device->set_vf_link_state)
1801 return -ENOSYS;
1802
1803 return device->set_vf_link_state(device, vf, port, state);
1804 }
1805 EXPORT_SYMBOL(ib_set_vf_link_state);
1806
ib_get_vf_config(struct ib_device * device,int vf,u8 port,struct ifla_vf_info * info)1807 int ib_get_vf_config(struct ib_device *device, int vf, u8 port,
1808 struct ifla_vf_info *info)
1809 {
1810 if (!device->get_vf_config)
1811 return -ENOSYS;
1812
1813 return device->get_vf_config(device, vf, port, info);
1814 }
1815 EXPORT_SYMBOL(ib_get_vf_config);
1816
ib_get_vf_stats(struct ib_device * device,int vf,u8 port,struct ifla_vf_stats * stats)1817 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port,
1818 struct ifla_vf_stats *stats)
1819 {
1820 if (!device->get_vf_stats)
1821 return -ENOSYS;
1822
1823 return device->get_vf_stats(device, vf, port, stats);
1824 }
1825 EXPORT_SYMBOL(ib_get_vf_stats);
1826
ib_set_vf_guid(struct ib_device * device,int vf,u8 port,u64 guid,int type)1827 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
1828 int type)
1829 {
1830 if (!device->set_vf_guid)
1831 return -ENOSYS;
1832
1833 return device->set_vf_guid(device, vf, port, guid, type);
1834 }
1835 EXPORT_SYMBOL(ib_set_vf_guid);
1836
1837 /**
1838 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
1839 * and set it the memory region.
1840 * @mr: memory region
1841 * @sg: dma mapped scatterlist
1842 * @sg_nents: number of entries in sg
1843 * @sg_offset: offset in bytes into sg
1844 * @page_size: page vector desired page size
1845 *
1846 * Constraints:
1847 * - The first sg element is allowed to have an offset.
1848 * - Each sg element must either be aligned to page_size or virtually
1849 * contiguous to the previous element. In case an sg element has a
1850 * non-contiguous offset, the mapping prefix will not include it.
1851 * - The last sg element is allowed to have length less than page_size.
1852 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
1853 * then only max_num_sg entries will be mapped.
1854 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
1855 * constraints holds and the page_size argument is ignored.
1856 *
1857 * Returns the number of sg elements that were mapped to the memory region.
1858 *
1859 * After this completes successfully, the memory region
1860 * is ready for registration.
1861 */
ib_map_mr_sg(struct ib_mr * mr,struct scatterlist * sg,int sg_nents,unsigned int * sg_offset,unsigned int page_size)1862 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
1863 unsigned int *sg_offset, unsigned int page_size)
1864 {
1865 if (unlikely(!mr->device->map_mr_sg))
1866 return -ENOSYS;
1867
1868 mr->page_size = page_size;
1869
1870 return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset);
1871 }
1872 EXPORT_SYMBOL(ib_map_mr_sg);
1873
1874 /**
1875 * ib_sg_to_pages() - Convert the largest prefix of a sg list
1876 * to a page vector
1877 * @mr: memory region
1878 * @sgl: dma mapped scatterlist
1879 * @sg_nents: number of entries in sg
1880 * @sg_offset_p: IN: start offset in bytes into sg
1881 * OUT: offset in bytes for element n of the sg of the first
1882 * byte that has not been processed where n is the return
1883 * value of this function.
1884 * @set_page: driver page assignment function pointer
1885 *
1886 * Core service helper for drivers to convert the largest
1887 * prefix of given sg list to a page vector. The sg list
1888 * prefix converted is the prefix that meet the requirements
1889 * of ib_map_mr_sg.
1890 *
1891 * Returns the number of sg elements that were assigned to
1892 * a page vector.
1893 */
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))1894 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
1895 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
1896 {
1897 struct scatterlist *sg;
1898 u64 last_end_dma_addr = 0;
1899 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
1900 unsigned int last_page_off = 0;
1901 u64 page_mask = ~((u64)mr->page_size - 1);
1902 int i, ret;
1903
1904 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
1905 return -EINVAL;
1906
1907 mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
1908 mr->length = 0;
1909
1910 for_each_sg(sgl, sg, sg_nents, i) {
1911 u64 dma_addr = sg_dma_address(sg) + sg_offset;
1912 u64 prev_addr = dma_addr;
1913 unsigned int dma_len = sg_dma_len(sg) - sg_offset;
1914 u64 end_dma_addr = dma_addr + dma_len;
1915 u64 page_addr = dma_addr & page_mask;
1916
1917 /*
1918 * For the second and later elements, check whether either the
1919 * end of element i-1 or the start of element i is not aligned
1920 * on a page boundary.
1921 */
1922 if (i && (last_page_off != 0 || page_addr != dma_addr)) {
1923 /* Stop mapping if there is a gap. */
1924 if (last_end_dma_addr != dma_addr)
1925 break;
1926
1927 /*
1928 * Coalesce this element with the last. If it is small
1929 * enough just update mr->length. Otherwise start
1930 * mapping from the next page.
1931 */
1932 goto next_page;
1933 }
1934
1935 do {
1936 ret = set_page(mr, page_addr);
1937 if (unlikely(ret < 0)) {
1938 sg_offset = prev_addr - sg_dma_address(sg);
1939 mr->length += prev_addr - dma_addr;
1940 if (sg_offset_p)
1941 *sg_offset_p = sg_offset;
1942 return i || sg_offset ? i : ret;
1943 }
1944 prev_addr = page_addr;
1945 next_page:
1946 page_addr += mr->page_size;
1947 } while (page_addr < end_dma_addr);
1948
1949 mr->length += dma_len;
1950 last_end_dma_addr = end_dma_addr;
1951 last_page_off = end_dma_addr & ~page_mask;
1952
1953 sg_offset = 0;
1954 }
1955
1956 if (sg_offset_p)
1957 *sg_offset_p = 0;
1958 return i;
1959 }
1960 EXPORT_SYMBOL(ib_sg_to_pages);
1961
1962 struct ib_drain_cqe {
1963 struct ib_cqe cqe;
1964 struct completion done;
1965 };
1966
ib_drain_qp_done(struct ib_cq * cq,struct ib_wc * wc)1967 static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
1968 {
1969 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
1970 cqe);
1971
1972 complete(&cqe->done);
1973 }
1974
1975 /*
1976 * Post a WR and block until its completion is reaped for the SQ.
1977 */
__ib_drain_sq(struct ib_qp * qp)1978 static void __ib_drain_sq(struct ib_qp *qp)
1979 {
1980 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
1981 struct ib_drain_cqe sdrain;
1982 const struct ib_send_wr *bad_swr;
1983 struct ib_rdma_wr swr = {
1984 .wr = {
1985 .opcode = IB_WR_RDMA_WRITE,
1986 .wr_cqe = &sdrain.cqe,
1987 },
1988 };
1989 int ret;
1990
1991 if (qp->send_cq->poll_ctx == IB_POLL_DIRECT) {
1992 WARN_ONCE(qp->send_cq->poll_ctx == IB_POLL_DIRECT,
1993 "IB_POLL_DIRECT poll_ctx not supported for drain\n");
1994 return;
1995 }
1996
1997 sdrain.cqe.done = ib_drain_qp_done;
1998 init_completion(&sdrain.done);
1999
2000 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2001 if (ret) {
2002 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2003 return;
2004 }
2005
2006 ret = ib_post_send(qp, &swr.wr, &bad_swr);
2007 if (ret) {
2008 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2009 return;
2010 }
2011
2012 wait_for_completion(&sdrain.done);
2013 }
2014
2015 /*
2016 * Post a WR and block until its completion is reaped for the RQ.
2017 */
__ib_drain_rq(struct ib_qp * qp)2018 static void __ib_drain_rq(struct ib_qp *qp)
2019 {
2020 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2021 struct ib_drain_cqe rdrain;
2022 struct ib_recv_wr rwr = {};
2023 const struct ib_recv_wr *bad_rwr;
2024 int ret;
2025
2026 if (qp->recv_cq->poll_ctx == IB_POLL_DIRECT) {
2027 WARN_ONCE(qp->recv_cq->poll_ctx == IB_POLL_DIRECT,
2028 "IB_POLL_DIRECT poll_ctx not supported for drain\n");
2029 return;
2030 }
2031
2032 rwr.wr_cqe = &rdrain.cqe;
2033 rdrain.cqe.done = ib_drain_qp_done;
2034 init_completion(&rdrain.done);
2035
2036 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2037 if (ret) {
2038 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2039 return;
2040 }
2041
2042 ret = ib_post_recv(qp, &rwr, &bad_rwr);
2043 if (ret) {
2044 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2045 return;
2046 }
2047
2048 wait_for_completion(&rdrain.done);
2049 }
2050
2051 /**
2052 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
2053 * application.
2054 * @qp: queue pair to drain
2055 *
2056 * If the device has a provider-specific drain function, then
2057 * call that. Otherwise call the generic drain function
2058 * __ib_drain_sq().
2059 *
2060 * The caller must:
2061 *
2062 * ensure there is room in the CQ and SQ for the drain work request and
2063 * completion.
2064 *
2065 * allocate the CQ using ib_alloc_cq() and the CQ poll context cannot be
2066 * IB_POLL_DIRECT.
2067 *
2068 * ensure that there are no other contexts that are posting WRs concurrently.
2069 * Otherwise the drain is not guaranteed.
2070 */
ib_drain_sq(struct ib_qp * qp)2071 void ib_drain_sq(struct ib_qp *qp)
2072 {
2073 if (qp->device->drain_sq)
2074 qp->device->drain_sq(qp);
2075 else
2076 __ib_drain_sq(qp);
2077 }
2078 EXPORT_SYMBOL(ib_drain_sq);
2079
2080 /**
2081 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
2082 * application.
2083 * @qp: queue pair to drain
2084 *
2085 * If the device has a provider-specific drain function, then
2086 * call that. Otherwise call the generic drain function
2087 * __ib_drain_rq().
2088 *
2089 * The caller must:
2090 *
2091 * ensure there is room in the CQ and RQ for the drain work request and
2092 * completion.
2093 *
2094 * allocate the CQ using ib_alloc_cq() and the CQ poll context cannot be
2095 * IB_POLL_DIRECT.
2096 *
2097 * ensure that there are no other contexts that are posting WRs concurrently.
2098 * Otherwise the drain is not guaranteed.
2099 */
ib_drain_rq(struct ib_qp * qp)2100 void ib_drain_rq(struct ib_qp *qp)
2101 {
2102 if (qp->device->drain_rq)
2103 qp->device->drain_rq(qp);
2104 else
2105 __ib_drain_rq(qp);
2106 }
2107 EXPORT_SYMBOL(ib_drain_rq);
2108
2109 /**
2110 * ib_drain_qp() - Block until all CQEs have been consumed by the
2111 * application on both the RQ and SQ.
2112 * @qp: queue pair to drain
2113 *
2114 * The caller must:
2115 *
2116 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
2117 * and completions.
2118 *
2119 * allocate the CQs using ib_alloc_cq() and the CQ poll context cannot be
2120 * IB_POLL_DIRECT.
2121 *
2122 * ensure that there are no other contexts that are posting WRs concurrently.
2123 * Otherwise the drain is not guaranteed.
2124 */
ib_drain_qp(struct ib_qp * qp)2125 void ib_drain_qp(struct ib_qp *qp)
2126 {
2127 ib_drain_sq(qp);
2128 if (!qp->srq)
2129 ib_drain_rq(qp);
2130 }
2131 EXPORT_SYMBOL(ib_drain_qp);
2132