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IB/core: Add netdev and gid attributes paramteres to cache
[linux-2.6-block.git] / drivers / infiniband / core / verbs.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
2a1d9b7f 7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
33b9b3ee 8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
1da177e4
LT		 9 *
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
15 *
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
18 * conditions are met:
19 *
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer.
23 *
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * SOFTWARE.
1da177e4
LT		 37 */
38
39#include <linux/errno.h>
40#include <linux/err.h>
b108d976 41#include <linux/export.h>
8c65b4a6 42#include <linux/string.h>
0e0ec7e0 43#include <linux/slab.h>
1da177e4 44
a4d61e84
RD		 45#include <rdma/ib_verbs.h>
46#include <rdma/ib_cache.h>
dd5f03be 47#include <rdma/ib_addr.h>
1da177e4 48
ed4c54e5 49#include "core_priv.h"
1da177e4 50
2b1b5b60
SG		 51static const char * const ib_events[] = {
52 [IB_EVENT_CQ_ERR] = "CQ error",
53 [IB_EVENT_QP_FATAL] = "QP fatal error",
54 [IB_EVENT_QP_REQ_ERR] = "QP request error",
55 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
56 [IB_EVENT_COMM_EST] = "communication established",
57 [IB_EVENT_SQ_DRAINED] = "send queue drained",
58 [IB_EVENT_PATH_MIG] = "path migration successful",
59 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
60 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
61 [IB_EVENT_PORT_ACTIVE] = "port active",
62 [IB_EVENT_PORT_ERR] = "port error",
63 [IB_EVENT_LID_CHANGE] = "LID change",
64 [IB_EVENT_PKEY_CHANGE] = "P_key change",
65 [IB_EVENT_SM_CHANGE] = "SM change",
66 [IB_EVENT_SRQ_ERR] = "SRQ error",
67 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
68 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
69 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
70 [IB_EVENT_GID_CHANGE] = "GID changed",
71};
72
73const char *ib_event_msg(enum ib_event_type event)
74{
75 size_t index = event;
76
77 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
78 ib_events[index] : "unrecognized event";
79}
80EXPORT_SYMBOL(ib_event_msg);
81
82static const char * const wc_statuses[] = {
83 [IB_WC_SUCCESS] = "success",
84 [IB_WC_LOC_LEN_ERR] = "local length error",
85 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
86 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
87 [IB_WC_LOC_PROT_ERR] = "local protection error",
88 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
89 [IB_WC_MW_BIND_ERR] = "memory management operation error",
90 [IB_WC_BAD_RESP_ERR] = "bad response error",
91 [IB_WC_LOC_ACCESS_ERR] = "local access error",
92 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
93 [IB_WC_REM_ACCESS_ERR] = "remote access error",
94 [IB_WC_REM_OP_ERR] = "remote operation error",
95 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
96 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
97 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
98 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
99 [IB_WC_REM_ABORT_ERR] = "operation aborted",
100 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
101 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
102 [IB_WC_FATAL_ERR] = "fatal error",
103 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
104 [IB_WC_GENERAL_ERR] = "general error",
105};
106
107const char *ib_wc_status_msg(enum ib_wc_status status)
108{
109 size_t index = status;
110
111 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
112 wc_statuses[index] : "unrecognized status";
113}
114EXPORT_SYMBOL(ib_wc_status_msg);
115
8385fd84 116__attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
bf6a9e31
JM		 117{
118 switch (rate) {
119 case IB_RATE_2_5_GBPS: return 1;
120 case IB_RATE_5_GBPS: return 2;
121 case IB_RATE_10_GBPS: return 4;
122 case IB_RATE_20_GBPS: return 8;
123 case IB_RATE_30_GBPS: return 12;
124 case IB_RATE_40_GBPS: return 16;
125 case IB_RATE_60_GBPS: return 24;
126 case IB_RATE_80_GBPS: return 32;
127 case IB_RATE_120_GBPS: return 48;
128 default: return -1;
129 }
130}
131EXPORT_SYMBOL(ib_rate_to_mult);
132
8385fd84 133__attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
bf6a9e31
JM		 134{
135 switch (mult) {
136 case 1: return IB_RATE_2_5_GBPS;
137 case 2: return IB_RATE_5_GBPS;
138 case 4: return IB_RATE_10_GBPS;
139 case 8: return IB_RATE_20_GBPS;
140 case 12: return IB_RATE_30_GBPS;
141 case 16: return IB_RATE_40_GBPS;
142 case 24: return IB_RATE_60_GBPS;
143 case 32: return IB_RATE_80_GBPS;
144 case 48: return IB_RATE_120_GBPS;
145 default: return IB_RATE_PORT_CURRENT;
146 }
147}
148EXPORT_SYMBOL(mult_to_ib_rate);
149
8385fd84 150__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
71eeba16
MA		 151{
152 switch (rate) {
153 case IB_RATE_2_5_GBPS: return 2500;
154 case IB_RATE_5_GBPS: return 5000;
155 case IB_RATE_10_GBPS: return 10000;
156 case IB_RATE_20_GBPS: return 20000;
157 case IB_RATE_30_GBPS: return 30000;
158 case IB_RATE_40_GBPS: return 40000;
159 case IB_RATE_60_GBPS: return 60000;
160 case IB_RATE_80_GBPS: return 80000;
161 case IB_RATE_120_GBPS: return 120000;
162 case IB_RATE_14_GBPS: return 14062;
163 case IB_RATE_56_GBPS: return 56250;
164 case IB_RATE_112_GBPS: return 112500;
165 case IB_RATE_168_GBPS: return 168750;
166 case IB_RATE_25_GBPS: return 25781;
167 case IB_RATE_100_GBPS: return 103125;
168 case IB_RATE_200_GBPS: return 206250;
169 case IB_RATE_300_GBPS: return 309375;
170 default: return -1;
171 }
172}
173EXPORT_SYMBOL(ib_rate_to_mbps);
174
8385fd84 175__attribute_const__ enum rdma_transport_type
07ebafba
TT		 176rdma_node_get_transport(enum rdma_node_type node_type)
177{
178 switch (node_type) {
179 case RDMA_NODE_IB_CA:
180 case RDMA_NODE_IB_SWITCH:
181 case RDMA_NODE_IB_ROUTER:
182 return RDMA_TRANSPORT_IB;
183 case RDMA_NODE_RNIC:
184 return RDMA_TRANSPORT_IWARP;
180771a3 185 case RDMA_NODE_USNIC:
5db5765e
UM		 186 return RDMA_TRANSPORT_USNIC;
187 case RDMA_NODE_USNIC_UDP:
248567f7 188 return RDMA_TRANSPORT_USNIC_UDP;
07ebafba
TT		 189 default:
190 BUG();
191 return 0;
192 }
193}
194EXPORT_SYMBOL(rdma_node_get_transport);
195
a3f5adaf
EC		 196enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
197{
198 if (device->get_link_layer)
199 return device->get_link_layer(device, port_num);
200
201 switch (rdma_node_get_transport(device->node_type)) {
202 case RDMA_TRANSPORT_IB:
203 return IB_LINK_LAYER_INFINIBAND;
204 case RDMA_TRANSPORT_IWARP:
180771a3 205 case RDMA_TRANSPORT_USNIC:
248567f7 206 case RDMA_TRANSPORT_USNIC_UDP:
a3f5adaf
EC		 207 return IB_LINK_LAYER_ETHERNET;
208 default:
209 return IB_LINK_LAYER_UNSPECIFIED;
210 }
211}
212EXPORT_SYMBOL(rdma_port_get_link_layer);
213
1da177e4
LT		 214/* Protection domains */
215
96249d70
JG		 216/**
217 * ib_alloc_pd - Allocates an unused protection domain.
218 * @device: The device on which to allocate the protection domain.
219 *
220 * A protection domain object provides an association between QPs, shared
221 * receive queues, address handles, memory regions, and memory windows.
222 *
223 * Every PD has a local_dma_lkey which can be used as the lkey value for local
224 * memory operations.
225 */
1da177e4
LT		 226struct ib_pd *ib_alloc_pd(struct ib_device *device)
227{
228 struct ib_pd *pd;
96249d70
JG		 229 struct ib_device_attr devattr;
230 int rc;
231
232 rc = ib_query_device(device, &devattr);
233 if (rc)
234 return ERR_PTR(rc);
1da177e4 235
b5e81bf5 236 pd = device->alloc_pd(device, NULL, NULL);
96249d70
JG		 237 if (IS_ERR(pd))
238 return pd;
1da177e4 239
96249d70
JG		 240 pd->device = device;
241 pd->uobject = NULL;
242 pd->local_mr = NULL;
243 atomic_set(&pd->usecnt, 0);
1da177e4 244
96249d70
JG		 245 if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
246 pd->local_dma_lkey = device->local_dma_lkey;
247 else {
248 struct ib_mr *mr;
249
250 mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE);
251 if (IS_ERR(mr)) {
252 ib_dealloc_pd(pd);
253 return (struct ib_pd *)mr;
254 }
1da177e4 255
96249d70
JG		 256 pd->local_mr = mr;
257 pd->local_dma_lkey = pd->local_mr->lkey;
1da177e4 258 }
1da177e4
LT		 259 return pd;
260}
261EXPORT_SYMBOL(ib_alloc_pd);
262
7dd78647
JG		 263/**
264 * ib_dealloc_pd - Deallocates a protection domain.
265 * @pd: The protection domain to deallocate.
266 *
267 * It is an error to call this function while any resources in the pd still
268 * exist. The caller is responsible to synchronously destroy them and
269 * guarantee no new allocations will happen.
270 */
271void ib_dealloc_pd(struct ib_pd *pd)
1da177e4 272{
7dd78647
JG		 273 int ret;
274
96249d70 275 if (pd->local_mr) {
7dd78647
JG		 276 ret = ib_dereg_mr(pd->local_mr);
277 WARN_ON(ret);
96249d70
JG		 278 pd->local_mr = NULL;
279 }
1da177e4 280
7dd78647
JG		 281 /* uverbs manipulates usecnt with proper locking, while the kabi
282 requires the caller to guarantee we can't race here. */
283 WARN_ON(atomic_read(&pd->usecnt));
1da177e4 284
7dd78647
JG		 285 /* Making delalloc_pd a void return is a WIP, no driver should return
286 an error here. */
287 ret = pd->device->dealloc_pd(pd);
288 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
1da177e4
LT		 289}
290EXPORT_SYMBOL(ib_dealloc_pd);
291
292/* Address handles */
293
294struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
295{
296 struct ib_ah *ah;
297
298 ah = pd->device->create_ah(pd, ah_attr);
299
300 if (!IS_ERR(ah)) {
b5e81bf5
RD		 301 ah->device = pd->device;
302 ah->pd = pd;
303 ah->uobject = NULL;
1da177e4
LT		 304 atomic_inc(&pd->usecnt);
305 }
306
307 return ah;
308}
309EXPORT_SYMBOL(ib_create_ah);
310
73cdaaee
IW		 311int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
312 const struct ib_wc *wc, const struct ib_grh *grh,
313 struct ib_ah_attr *ah_attr)
513789ed 314{
513789ed
HR		 315 u32 flow_class;
316 u16 gid_index;
317 int ret;
318
4e00d694 319 memset(ah_attr, 0, sizeof *ah_attr);
227128fc 320 if (rdma_cap_eth_ah(device, port_num)) {
dd5f03be
MB		 321 if (!(wc->wc_flags & IB_WC_GRH))
322 return -EPROTOTYPE;
323
324 if (wc->wc_flags & IB_WC_WITH_SMAC &&
325 wc->wc_flags & IB_WC_WITH_VLAN) {
326 memcpy(ah_attr->dmac, wc->smac, ETH_ALEN);
327 ah_attr->vlan_id = wc->vlan_id;
328 } else {
329 ret = rdma_addr_find_dmac_by_grh(&grh->dgid, &grh->sgid,
330 ah_attr->dmac, &ah_attr->vlan_id);
331 if (ret)
332 return ret;
333 }
334 } else {
335 ah_attr->vlan_id = 0xffff;
336 }
337
4e00d694
SH		 338 ah_attr->dlid = wc->slid;
339 ah_attr->sl = wc->sl;
340 ah_attr->src_path_bits = wc->dlid_path_bits;
341 ah_attr->port_num = port_num;
513789ed
HR		 342
343 if (wc->wc_flags & IB_WC_GRH) {
4e00d694
SH		 344 ah_attr->ah_flags = IB_AH_GRH;
345 ah_attr->grh.dgid = grh->sgid;
513789ed 346
55ee3ab2
MB		 347 ret = ib_find_cached_gid(device, &grh->dgid,
348 NULL, &port_num, &gid_index);
513789ed 349 if (ret)
4e00d694 350 return ret;
513789ed 351
4e00d694 352 ah_attr->grh.sgid_index = (u8) gid_index;
497677ab 353 flow_class = be32_to_cpu(grh->version_tclass_flow);
4e00d694 354 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
47645d8d 355 ah_attr->grh.hop_limit = 0xFF;
4e00d694 356 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
513789ed 357 }
4e00d694
SH		 358 return 0;
359}
360EXPORT_SYMBOL(ib_init_ah_from_wc);
361
73cdaaee
IW		 362struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
363 const struct ib_grh *grh, u8 port_num)
4e00d694
SH		 364{
365 struct ib_ah_attr ah_attr;
366 int ret;
367
368 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
369 if (ret)
370 return ERR_PTR(ret);
513789ed
HR		 371
372 return ib_create_ah(pd, &ah_attr);
373}
374EXPORT_SYMBOL(ib_create_ah_from_wc);
375
1da177e4
LT		 376int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
377{
378 return ah->device->modify_ah ?
379 ah->device->modify_ah(ah, ah_attr) :
380 -ENOSYS;
381}
382EXPORT_SYMBOL(ib_modify_ah);
383
384int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
385{
386 return ah->device->query_ah ?
387 ah->device->query_ah(ah, ah_attr) :
388 -ENOSYS;
389}
390EXPORT_SYMBOL(ib_query_ah);
391
392int ib_destroy_ah(struct ib_ah *ah)
393{
394 struct ib_pd *pd;
395 int ret;
396
397 pd = ah->pd;
398 ret = ah->device->destroy_ah(ah);
399 if (!ret)
400 atomic_dec(&pd->usecnt);
401
402 return ret;
403}
404EXPORT_SYMBOL(ib_destroy_ah);
405
d41fcc67
RD		 406/* Shared receive queues */
407
408struct ib_srq *ib_create_srq(struct ib_pd *pd,
409 struct ib_srq_init_attr *srq_init_attr)
410{
411 struct ib_srq *srq;
412
413 if (!pd->device->create_srq)
414 return ERR_PTR(-ENOSYS);
415
416 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
417
418 if (!IS_ERR(srq)) {
419 srq->device = pd->device;
420 srq->pd = pd;
421 srq->uobject = NULL;
422 srq->event_handler = srq_init_attr->event_handler;
423 srq->srq_context = srq_init_attr->srq_context;
96104eda 424 srq->srq_type = srq_init_attr->srq_type;
418d5130
SH		 425 if (srq->srq_type == IB_SRQT_XRC) {
426 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
427 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
428 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
429 atomic_inc(&srq->ext.xrc.cq->usecnt);
430 }
d41fcc67
RD		 431 atomic_inc(&pd->usecnt);
432 atomic_set(&srq->usecnt, 0);
433 }
434
435 return srq;
436}
437EXPORT_SYMBOL(ib_create_srq);
438
439int ib_modify_srq(struct ib_srq *srq,
440 struct ib_srq_attr *srq_attr,
441 enum ib_srq_attr_mask srq_attr_mask)
442{
7ce5eacb
DB		 443 return srq->device->modify_srq ?
444 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
445 -ENOSYS;
d41fcc67
RD		 446}
447EXPORT_SYMBOL(ib_modify_srq);
448
449int ib_query_srq(struct ib_srq *srq,
450 struct ib_srq_attr *srq_attr)
451{
452 return srq->device->query_srq ?
453 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
454}
455EXPORT_SYMBOL(ib_query_srq);
456
457int ib_destroy_srq(struct ib_srq *srq)
458{
459 struct ib_pd *pd;
418d5130
SH		 460 enum ib_srq_type srq_type;
461 struct ib_xrcd *uninitialized_var(xrcd);
462 struct ib_cq *uninitialized_var(cq);
d41fcc67
RD		 463 int ret;
464
465 if (atomic_read(&srq->usecnt))
466 return -EBUSY;
467
468 pd = srq->pd;
418d5130
SH		 469 srq_type = srq->srq_type;
470 if (srq_type == IB_SRQT_XRC) {
471 xrcd = srq->ext.xrc.xrcd;
472 cq = srq->ext.xrc.cq;
473 }
d41fcc67
RD		 474
475 ret = srq->device->destroy_srq(srq);
418d5130 476 if (!ret) {
d41fcc67 477 atomic_dec(&pd->usecnt);
418d5130
SH		 478 if (srq_type == IB_SRQT_XRC) {
479 atomic_dec(&xrcd->usecnt);
480 atomic_dec(&cq->usecnt);
481 }
482 }
d41fcc67
RD		 483
484 return ret;
485}
486EXPORT_SYMBOL(ib_destroy_srq);
487
1da177e4
LT		 488/* Queue pairs */
489
0e0ec7e0
SH		 490static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
491{
492 struct ib_qp *qp = context;
73c40c61 493 unsigned long flags;
0e0ec7e0 494
73c40c61 495 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
0e0ec7e0 496 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
eec9e29f
SP		 497 if (event->element.qp->event_handler)
498 event->element.qp->event_handler(event, event->element.qp->qp_context);
73c40c61 499 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
0e0ec7e0
SH		 500}
501
d3d72d90
SH		 502static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
503{
504 mutex_lock(&xrcd->tgt_qp_mutex);
505 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
506 mutex_unlock(&xrcd->tgt_qp_mutex);
507}
508
0e0ec7e0
SH		 509static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
510 void (*event_handler)(struct ib_event *, void *),
511 void *qp_context)
d3d72d90 512{
0e0ec7e0
SH		 513 struct ib_qp *qp;
514 unsigned long flags;
515
516 qp = kzalloc(sizeof *qp, GFP_KERNEL);
517 if (!qp)
518 return ERR_PTR(-ENOMEM);
519
520 qp->real_qp = real_qp;
521 atomic_inc(&real_qp->usecnt);
522 qp->device = real_qp->device;
523 qp->event_handler = event_handler;
524 qp->qp_context = qp_context;
525 qp->qp_num = real_qp->qp_num;
526 qp->qp_type = real_qp->qp_type;
527
528 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
529 list_add(&qp->open_list, &real_qp->open_list);
530 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
531
532 return qp;
533}
534
535struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
536 struct ib_qp_open_attr *qp_open_attr)
537{
538 struct ib_qp *qp, *real_qp;
539
540 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
541 return ERR_PTR(-EINVAL);
542
543 qp = ERR_PTR(-EINVAL);
d3d72d90 544 mutex_lock(&xrcd->tgt_qp_mutex);
0e0ec7e0
SH		 545 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
546 if (real_qp->qp_num == qp_open_attr->qp_num) {
547 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
548 qp_open_attr->qp_context);
549 break;
550 }
551 }
d3d72d90 552 mutex_unlock(&xrcd->tgt_qp_mutex);
0e0ec7e0 553 return qp;
d3d72d90 554}
0e0ec7e0 555EXPORT_SYMBOL(ib_open_qp);
d3d72d90 556
1da177e4
LT		 557struct ib_qp *ib_create_qp(struct ib_pd *pd,
558 struct ib_qp_init_attr *qp_init_attr)
559{
0e0ec7e0 560 struct ib_qp *qp, *real_qp;
b42b63cf 561 struct ib_device *device;
1da177e4 562
b42b63cf
SH		 563 device = pd ? pd->device : qp_init_attr->xrcd->device;
564 qp = device->create_qp(pd, qp_init_attr, NULL);
1da177e4
LT		 565
566 if (!IS_ERR(qp)) {
0e0ec7e0
SH		 567 qp->device = device;
568 qp->real_qp = qp;
569 qp->uobject = NULL;
570 qp->qp_type = qp_init_attr->qp_type;
b42b63cf 571
e47e321a 572 atomic_set(&qp->usecnt, 0);
b42b63cf 573 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
0e0ec7e0
SH		 574 qp->event_handler = __ib_shared_qp_event_handler;
575 qp->qp_context = qp;
b42b63cf
SH		 576 qp->pd = NULL;
577 qp->send_cq = qp->recv_cq = NULL;
578 qp->srq = NULL;
579 qp->xrcd = qp_init_attr->xrcd;
580 atomic_inc(&qp_init_attr->xrcd->usecnt);
0e0ec7e0 581 INIT_LIST_HEAD(&qp->open_list);
0e0ec7e0
SH		 582
583 real_qp = qp;
584 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
585 qp_init_attr->qp_context);
586 if (!IS_ERR(qp))
587 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
588 else
589 real_qp->device->destroy_qp(real_qp);
b42b63cf 590 } else {
0e0ec7e0
SH		 591 qp->event_handler = qp_init_attr->event_handler;
592 qp->qp_context = qp_init_attr->qp_context;
b42b63cf
SH		 593 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
594 qp->recv_cq = NULL;
595 qp->srq = NULL;
596 } else {
597 qp->recv_cq = qp_init_attr->recv_cq;
598 atomic_inc(&qp_init_attr->recv_cq->usecnt);
599 qp->srq = qp_init_attr->srq;
600 if (qp->srq)
601 atomic_inc(&qp_init_attr->srq->usecnt);
602 }
603
604 qp->pd = pd;
605 qp->send_cq = qp_init_attr->send_cq;
606 qp->xrcd = NULL;
607
608 atomic_inc(&pd->usecnt);
609 atomic_inc(&qp_init_attr->send_cq->usecnt);
610 }
1da177e4
LT		 611 }
612
613 return qp;
614}
615EXPORT_SYMBOL(ib_create_qp);
616
8a51866f
RD		 617static const struct {
618 int valid;
b42b63cf 619 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
dd5f03be 620 enum ib_qp_attr_mask req_param_add_eth[IB_QPT_MAX];
b42b63cf 621 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
dd5f03be 622 enum ib_qp_attr_mask opt_param_add_eth[IB_QPT_MAX];
8a51866f
RD		 623} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
624 [IB_QPS_RESET] = {
625 [IB_QPS_RESET] = { .valid = 1 },
8a51866f
RD		 626 [IB_QPS_INIT] = {
627 .valid = 1,
628 .req_param = {
629 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
630 IB_QP_PORT |
631 IB_QP_QKEY),
c938a616 632 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
8a51866f
RD		 633 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
634 IB_QP_PORT |
635 IB_QP_ACCESS_FLAGS),
636 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
637 IB_QP_PORT |
638 IB_QP_ACCESS_FLAGS),
b42b63cf
SH		 639 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
640 IB_QP_PORT |
641 IB_QP_ACCESS_FLAGS),
642 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
643 IB_QP_PORT |
644 IB_QP_ACCESS_FLAGS),
8a51866f
RD		 645 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
646 IB_QP_QKEY),
647 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
648 IB_QP_QKEY),
649 }
650 },
651 },
652 [IB_QPS_INIT] = {
653 [IB_QPS_RESET] = { .valid = 1 },
654 [IB_QPS_ERR] = { .valid = 1 },
655 [IB_QPS_INIT] = {
656 .valid = 1,
657 .opt_param = {
658 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
659 IB_QP_PORT |
660 IB_QP_QKEY),
661 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
662 IB_QP_PORT |
663 IB_QP_ACCESS_FLAGS),
664 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
665 IB_QP_PORT |
666 IB_QP_ACCESS_FLAGS),
b42b63cf
SH		 667 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
668 IB_QP_PORT |
669 IB_QP_ACCESS_FLAGS),
670 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
671 IB_QP_PORT |
672 IB_QP_ACCESS_FLAGS),
8a51866f
RD		 673 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
674 IB_QP_QKEY),
675 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
676 IB_QP_QKEY),
677 }
678 },
679 [IB_QPS_RTR] = {
680 .valid = 1,
681 .req_param = {
682 [IB_QPT_UC] = (IB_QP_AV |
683 IB_QP_PATH_MTU |
684 IB_QP_DEST_QPN |
685 IB_QP_RQ_PSN),
686 [IB_QPT_RC] = (IB_QP_AV |
687 IB_QP_PATH_MTU |
688 IB_QP_DEST_QPN |
689 IB_QP_RQ_PSN |
690 IB_QP_MAX_DEST_RD_ATOMIC |
691 IB_QP_MIN_RNR_TIMER),
b42b63cf
SH		 692 [IB_QPT_XRC_INI] = (IB_QP_AV |
693 IB_QP_PATH_MTU |
694 IB_QP_DEST_QPN |
695 IB_QP_RQ_PSN),
696 [IB_QPT_XRC_TGT] = (IB_QP_AV |
697 IB_QP_PATH_MTU |
698 IB_QP_DEST_QPN |
699 IB_QP_RQ_PSN |
700 IB_QP_MAX_DEST_RD_ATOMIC |
701 IB_QP_MIN_RNR_TIMER),
8a51866f 702 },
dd5f03be
MB		 703 .req_param_add_eth = {
704 [IB_QPT_RC] = (IB_QP_SMAC),
705 [IB_QPT_UC] = (IB_QP_SMAC),
706 [IB_QPT_XRC_INI] = (IB_QP_SMAC),
707 [IB_QPT_XRC_TGT] = (IB_QP_SMAC)
708 },
8a51866f
RD		 709 .opt_param = {
710 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
711 IB_QP_QKEY),
712 [IB_QPT_UC] = (IB_QP_ALT_PATH |
713 IB_QP_ACCESS_FLAGS |
714 IB_QP_PKEY_INDEX),
715 [IB_QPT_RC] = (IB_QP_ALT_PATH |
716 IB_QP_ACCESS_FLAGS |
717 IB_QP_PKEY_INDEX),
b42b63cf
SH		 718 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
719 IB_QP_ACCESS_FLAGS |
720 IB_QP_PKEY_INDEX),
721 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
722 IB_QP_ACCESS_FLAGS |
723 IB_QP_PKEY_INDEX),
8a51866f
RD		 724 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
725 IB_QP_QKEY),
726 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
727 IB_QP_QKEY),
dd5f03be
MB		 728 },
729 .opt_param_add_eth = {
730 [IB_QPT_RC] = (IB_QP_ALT_SMAC |
731 IB_QP_VID |
732 IB_QP_ALT_VID),
733 [IB_QPT_UC] = (IB_QP_ALT_SMAC |
734 IB_QP_VID |
735 IB_QP_ALT_VID),
736 [IB_QPT_XRC_INI] = (IB_QP_ALT_SMAC |
737 IB_QP_VID |
738 IB_QP_ALT_VID),
739 [IB_QPT_XRC_TGT] = (IB_QP_ALT_SMAC |
740 IB_QP_VID |
741 IB_QP_ALT_VID)
742 }
8a51866f
RD		 743 }
744 },
745 [IB_QPS_RTR] = {
746 [IB_QPS_RESET] = { .valid = 1 },
747 [IB_QPS_ERR] = { .valid = 1 },
748 [IB_QPS_RTS] = {
749 .valid = 1,
750 .req_param = {
751 [IB_QPT_UD] = IB_QP_SQ_PSN,
752 [IB_QPT_UC] = IB_QP_SQ_PSN,
753 [IB_QPT_RC] = (IB_QP_TIMEOUT |
754 IB_QP_RETRY_CNT |
755 IB_QP_RNR_RETRY |
756 IB_QP_SQ_PSN |
757 IB_QP_MAX_QP_RD_ATOMIC),
b42b63cf
SH		 758 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
759 IB_QP_RETRY_CNT |
760 IB_QP_RNR_RETRY |
761 IB_QP_SQ_PSN |
762 IB_QP_MAX_QP_RD_ATOMIC),
763 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
764 IB_QP_SQ_PSN),
8a51866f
RD		 765 [IB_QPT_SMI] = IB_QP_SQ_PSN,
766 [IB_QPT_GSI] = IB_QP_SQ_PSN,
767 },
768 .opt_param = {
769 [IB_QPT_UD] = (IB_QP_CUR_STATE |
770 IB_QP_QKEY),
771 [IB_QPT_UC] = (IB_QP_CUR_STATE |
772 IB_QP_ALT_PATH |
773 IB_QP_ACCESS_FLAGS |
774 IB_QP_PATH_MIG_STATE),
775 [IB_QPT_RC] = (IB_QP_CUR_STATE |
776 IB_QP_ALT_PATH |
777 IB_QP_ACCESS_FLAGS |
778 IB_QP_MIN_RNR_TIMER |
779 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 780 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
781 IB_QP_ALT_PATH |
782 IB_QP_ACCESS_FLAGS |
783 IB_QP_PATH_MIG_STATE),
784 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
785 IB_QP_ALT_PATH |
786 IB_QP_ACCESS_FLAGS |
787 IB_QP_MIN_RNR_TIMER |
788 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 789 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
790 IB_QP_QKEY),
791 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
792 IB_QP_QKEY),
793 }
794 }
795 },
796 [IB_QPS_RTS] = {
797 [IB_QPS_RESET] = { .valid = 1 },
798 [IB_QPS_ERR] = { .valid = 1 },
799 [IB_QPS_RTS] = {
800 .valid = 1,
801 .opt_param = {
802 [IB_QPT_UD] = (IB_QP_CUR_STATE |
803 IB_QP_QKEY),
4546d31d
DB		 804 [IB_QPT_UC] = (IB_QP_CUR_STATE |
805 IB_QP_ACCESS_FLAGS |
8a51866f
RD		 806 IB_QP_ALT_PATH |
807 IB_QP_PATH_MIG_STATE),
4546d31d
DB		 808 [IB_QPT_RC] = (IB_QP_CUR_STATE |
809 IB_QP_ACCESS_FLAGS |
8a51866f
RD		 810 IB_QP_ALT_PATH |
811 IB_QP_PATH_MIG_STATE |
812 IB_QP_MIN_RNR_TIMER),
b42b63cf
SH		 813 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
814 IB_QP_ACCESS_FLAGS |
815 IB_QP_ALT_PATH |
816 IB_QP_PATH_MIG_STATE),
817 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
818 IB_QP_ACCESS_FLAGS |
819 IB_QP_ALT_PATH |
820 IB_QP_PATH_MIG_STATE |
821 IB_QP_MIN_RNR_TIMER),
8a51866f
RD		 822 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
823 IB_QP_QKEY),
824 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
825 IB_QP_QKEY),
826 }
827 },
828 [IB_QPS_SQD] = {
829 .valid = 1,
830 .opt_param = {
831 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
832 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
833 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
b42b63cf
SH		 834 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
835 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
8a51866f
RD		 836 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
837 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
838 }
839 },
840 },
841 [IB_QPS_SQD] = {
842 [IB_QPS_RESET] = { .valid = 1 },
843 [IB_QPS_ERR] = { .valid = 1 },
844 [IB_QPS_RTS] = {
845 .valid = 1,
846 .opt_param = {
847 [IB_QPT_UD] = (IB_QP_CUR_STATE |
848 IB_QP_QKEY),
849 [IB_QPT_UC] = (IB_QP_CUR_STATE |
850 IB_QP_ALT_PATH |
851 IB_QP_ACCESS_FLAGS |
852 IB_QP_PATH_MIG_STATE),
853 [IB_QPT_RC] = (IB_QP_CUR_STATE |
854 IB_QP_ALT_PATH |
855 IB_QP_ACCESS_FLAGS |
856 IB_QP_MIN_RNR_TIMER |
857 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 858 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
859 IB_QP_ALT_PATH |
860 IB_QP_ACCESS_FLAGS |
861 IB_QP_PATH_MIG_STATE),
862 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
863 IB_QP_ALT_PATH |
864 IB_QP_ACCESS_FLAGS |
865 IB_QP_MIN_RNR_TIMER |
866 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 867 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
868 IB_QP_QKEY),
869 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
870 IB_QP_QKEY),
871 }
872 },
873 [IB_QPS_SQD] = {
874 .valid = 1,
875 .opt_param = {
876 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
877 IB_QP_QKEY),
878 [IB_QPT_UC] = (IB_QP_AV |
8a51866f
RD		 879 IB_QP_ALT_PATH |
880 IB_QP_ACCESS_FLAGS |
881 IB_QP_PKEY_INDEX |
882 IB_QP_PATH_MIG_STATE),
883 [IB_QPT_RC] = (IB_QP_PORT |
884 IB_QP_AV |
885 IB_QP_TIMEOUT |
886 IB_QP_RETRY_CNT |
887 IB_QP_RNR_RETRY |
888 IB_QP_MAX_QP_RD_ATOMIC |
889 IB_QP_MAX_DEST_RD_ATOMIC |
8a51866f
RD		 890 IB_QP_ALT_PATH |
891 IB_QP_ACCESS_FLAGS |
892 IB_QP_PKEY_INDEX |
893 IB_QP_MIN_RNR_TIMER |
894 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 895 [IB_QPT_XRC_INI] = (IB_QP_PORT |
896 IB_QP_AV |
897 IB_QP_TIMEOUT |
898 IB_QP_RETRY_CNT |
899 IB_QP_RNR_RETRY |
900 IB_QP_MAX_QP_RD_ATOMIC |
901 IB_QP_ALT_PATH |
902 IB_QP_ACCESS_FLAGS |
903 IB_QP_PKEY_INDEX |
904 IB_QP_PATH_MIG_STATE),
905 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
906 IB_QP_AV |
907 IB_QP_TIMEOUT |
908 IB_QP_MAX_DEST_RD_ATOMIC |
909 IB_QP_ALT_PATH |
910 IB_QP_ACCESS_FLAGS |
911 IB_QP_PKEY_INDEX |
912 IB_QP_MIN_RNR_TIMER |
913 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 914 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
915 IB_QP_QKEY),
916 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
917 IB_QP_QKEY),
918 }
919 }
920 },
921 [IB_QPS_SQE] = {
922 [IB_QPS_RESET] = { .valid = 1 },
923 [IB_QPS_ERR] = { .valid = 1 },
924 [IB_QPS_RTS] = {
925 .valid = 1,
926 .opt_param = {
927 [IB_QPT_UD] = (IB_QP_CUR_STATE |
928 IB_QP_QKEY),
929 [IB_QPT_UC] = (IB_QP_CUR_STATE |
930 IB_QP_ACCESS_FLAGS),
931 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
932 IB_QP_QKEY),
933 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
934 IB_QP_QKEY),
935 }
936 }
937 },
938 [IB_QPS_ERR] = {
939 [IB_QPS_RESET] = { .valid = 1 },
940 [IB_QPS_ERR] = { .valid = 1 }
941 }
942};
943
944int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
dd5f03be
MB		 945 enum ib_qp_type type, enum ib_qp_attr_mask mask,
946 enum rdma_link_layer ll)
8a51866f
RD		 947{
948 enum ib_qp_attr_mask req_param, opt_param;
949
950 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
951 next_state < 0 || next_state > IB_QPS_ERR)
952 return 0;
953
954 if (mask & IB_QP_CUR_STATE &&
955 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
956 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
957 return 0;
958
959 if (!qp_state_table[cur_state][next_state].valid)
960 return 0;
961
962 req_param = qp_state_table[cur_state][next_state].req_param[type];
963 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
964
dd5f03be
MB		 965 if (ll == IB_LINK_LAYER_ETHERNET) {
966 req_param |= qp_state_table[cur_state][next_state].
967 req_param_add_eth[type];
968 opt_param |= qp_state_table[cur_state][next_state].
969 opt_param_add_eth[type];
970 }
971
8a51866f
RD		 972 if ((mask & req_param) != req_param)
973 return 0;
974
975 if (mask & ~(req_param | opt_param | IB_QP_STATE))
976 return 0;
977
978 return 1;
979}
980EXPORT_SYMBOL(ib_modify_qp_is_ok);
981
ed4c54e5
OG		 982int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
983 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
984{
985 int ret = 0;
986 union ib_gid sgid;
987
988 if ((*qp_attr_mask & IB_QP_AV) &&
227128fc 989 (rdma_cap_eth_ah(qp->device, qp_attr->ah_attr.port_num))) {
ed4c54e5 990 ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num,
55ee3ab2
MB		 991 qp_attr->ah_attr.grh.sgid_index, &sgid,
992 NULL);
ed4c54e5
OG		 993 if (ret)
994 goto out;
995 if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
996 rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw, qp_attr->ah_attr.dmac);
997 rdma_get_ll_mac((struct in6_addr *)sgid.raw, qp_attr->smac);
c1bd6cde
MS		 998 if (!(*qp_attr_mask & IB_QP_VID))
999 qp_attr->vlan_id = rdma_get_vlan_id(&sgid);
ed4c54e5
OG		 1000 } else {
1001 ret = rdma_addr_find_dmac_by_grh(&sgid, &qp_attr->ah_attr.grh.dgid,
1002 qp_attr->ah_attr.dmac, &qp_attr->vlan_id);
1003 if (ret)
1004 goto out;
1005 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr->smac, NULL);
1006 if (ret)
1007 goto out;
1008 }
1009 *qp_attr_mask |= IB_QP_SMAC;
1010 if (qp_attr->vlan_id < 0xFFFF)
1011 *qp_attr_mask |= IB_QP_VID;
1012 }
1013out:
1014 return ret;
1015}
1016EXPORT_SYMBOL(ib_resolve_eth_l2_attrs);
1017
1018
1da177e4
LT		 1019int ib_modify_qp(struct ib_qp *qp,
1020 struct ib_qp_attr *qp_attr,
1021 int qp_attr_mask)
1022{
ed4c54e5
OG		 1023 int ret;
1024
1025 ret = ib_resolve_eth_l2_attrs(qp, qp_attr, &qp_attr_mask);
1026 if (ret)
1027 return ret;
1028
0e0ec7e0 1029 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1da177e4
LT		 1030}
1031EXPORT_SYMBOL(ib_modify_qp);
1032
1033int ib_query_qp(struct ib_qp *qp,
1034 struct ib_qp_attr *qp_attr,
1035 int qp_attr_mask,
1036 struct ib_qp_init_attr *qp_init_attr)
1037{
1038 return qp->device->query_qp ?
0e0ec7e0 1039 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1da177e4
LT		 1040 -ENOSYS;
1041}
1042EXPORT_SYMBOL(ib_query_qp);
1043
0e0ec7e0
SH		 1044int ib_close_qp(struct ib_qp *qp)
1045{
1046 struct ib_qp *real_qp;
1047 unsigned long flags;
1048
1049 real_qp = qp->real_qp;
1050 if (real_qp == qp)
1051 return -EINVAL;
1052
1053 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1054 list_del(&qp->open_list);
1055 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1056
1057 atomic_dec(&real_qp->usecnt);
1058 kfree(qp);
1059
1060 return 0;
1061}
1062EXPORT_SYMBOL(ib_close_qp);
1063
1064static int __ib_destroy_shared_qp(struct ib_qp *qp)
1065{
1066 struct ib_xrcd *xrcd;
1067 struct ib_qp *real_qp;
1068 int ret;
1069
1070 real_qp = qp->real_qp;
1071 xrcd = real_qp->xrcd;
1072
1073 mutex_lock(&xrcd->tgt_qp_mutex);
1074 ib_close_qp(qp);
1075 if (atomic_read(&real_qp->usecnt) == 0)
1076 list_del(&real_qp->xrcd_list);
1077 else
1078 real_qp = NULL;
1079 mutex_unlock(&xrcd->tgt_qp_mutex);
1080
1081 if (real_qp) {
1082 ret = ib_destroy_qp(real_qp);
1083 if (!ret)
1084 atomic_dec(&xrcd->usecnt);
1085 else
1086 __ib_insert_xrcd_qp(xrcd, real_qp);
1087 }
1088
1089 return 0;
1090}
1091
1da177e4
LT		 1092int ib_destroy_qp(struct ib_qp *qp)
1093{
1094 struct ib_pd *pd;
1095 struct ib_cq *scq, *rcq;
1096 struct ib_srq *srq;
1097 int ret;
1098
0e0ec7e0
SH		 1099 if (atomic_read(&qp->usecnt))
1100 return -EBUSY;
1101
1102 if (qp->real_qp != qp)
1103 return __ib_destroy_shared_qp(qp);
1104
b42b63cf
SH		 1105 pd = qp->pd;
1106 scq = qp->send_cq;
1107 rcq = qp->recv_cq;
1108 srq = qp->srq;
1da177e4
LT		 1109
1110 ret = qp->device->destroy_qp(qp);
1111 if (!ret) {
b42b63cf
SH		 1112 if (pd)
1113 atomic_dec(&pd->usecnt);
1114 if (scq)
1115 atomic_dec(&scq->usecnt);
1116 if (rcq)
1117 atomic_dec(&rcq->usecnt);
1da177e4
LT		 1118 if (srq)
1119 atomic_dec(&srq->usecnt);
1120 }
1121
1122 return ret;
1123}
1124EXPORT_SYMBOL(ib_destroy_qp);
1125
1126/* Completion queues */
1127
1128struct ib_cq *ib_create_cq(struct ib_device *device,
1129 ib_comp_handler comp_handler,
1130 void (*event_handler)(struct ib_event *, void *),
8e37210b
MB		 1131 void *cq_context,
1132 const struct ib_cq_init_attr *cq_attr)
1da177e4
LT		 1133{
1134 struct ib_cq *cq;
1135
8e37210b 1136 cq = device->create_cq(device, cq_attr, NULL, NULL);
1da177e4
LT		 1137
1138 if (!IS_ERR(cq)) {
1139 cq->device = device;
b5e81bf5 1140 cq->uobject = NULL;
1da177e4
LT		 1141 cq->comp_handler = comp_handler;
1142 cq->event_handler = event_handler;
1143 cq->cq_context = cq_context;
1144 atomic_set(&cq->usecnt, 0);
1145 }
1146
1147 return cq;
1148}
1149EXPORT_SYMBOL(ib_create_cq);
1150
2dd57162
EC		 1151int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1152{
1153 return cq->device->modify_cq ?
1154 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1155}
1156EXPORT_SYMBOL(ib_modify_cq);
1157
1da177e4
LT		 1158int ib_destroy_cq(struct ib_cq *cq)
1159{
1160 if (atomic_read(&cq->usecnt))
1161 return -EBUSY;
1162
1163 return cq->device->destroy_cq(cq);
1164}
1165EXPORT_SYMBOL(ib_destroy_cq);
1166
a74cd4af 1167int ib_resize_cq(struct ib_cq *cq, int cqe)
1da177e4 1168{
40de2e54 1169 return cq->device->resize_cq ?
33b9b3ee 1170 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1da177e4
LT		 1171}
1172EXPORT_SYMBOL(ib_resize_cq);
1173
1174/* Memory regions */
1175
1176struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
1177{
1178 struct ib_mr *mr;
1c636f80
EC		 1179 int err;
1180
1181 err = ib_check_mr_access(mr_access_flags);
1182 if (err)
1183 return ERR_PTR(err);
1da177e4
LT		 1184
1185 mr = pd->device->get_dma_mr(pd, mr_access_flags);
1186
1187 if (!IS_ERR(mr)) {
b5e81bf5
RD		 1188 mr->device = pd->device;
1189 mr->pd = pd;
1190 mr->uobject = NULL;
1da177e4
LT		 1191 atomic_inc(&pd->usecnt);
1192 atomic_set(&mr->usecnt, 0);
1193 }
1194
1195 return mr;
1196}
1197EXPORT_SYMBOL(ib_get_dma_mr);
1198
1da177e4
LT		 1199int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1200{
1201 return mr->device->query_mr ?
1202 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1203}
1204EXPORT_SYMBOL(ib_query_mr);
1205
1206int ib_dereg_mr(struct ib_mr *mr)
1207{
1208 struct ib_pd *pd;
1209 int ret;
1210
1211 if (atomic_read(&mr->usecnt))
1212 return -EBUSY;
1213
1214 pd = mr->pd;
1215 ret = mr->device->dereg_mr(mr);
1216 if (!ret)
1217 atomic_dec(&pd->usecnt);
1218
1219 return ret;
1220}
1221EXPORT_SYMBOL(ib_dereg_mr);
1222
9bee178b
SG		 1223/**
1224 * ib_alloc_mr() - Allocates a memory region
1225 * @pd: protection domain associated with the region
1226 * @mr_type: memory region type
1227 * @max_num_sg: maximum sg entries available for registration.
1228 *
1229 * Notes:
1230 * Memory registeration page/sg lists must not exceed max_num_sg.
1231 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1232 * max_num_sg * used_page_size.
1233 *
1234 */
1235struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1236 enum ib_mr_type mr_type,
1237 u32 max_num_sg)
00f7ec36
SW		 1238{
1239 struct ib_mr *mr;
1240
d9f272c5 1241 if (!pd->device->alloc_mr)
00f7ec36
SW		 1242 return ERR_PTR(-ENOSYS);
1243
d9f272c5 1244 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
00f7ec36
SW		 1245 if (!IS_ERR(mr)) {
1246 mr->device = pd->device;
1247 mr->pd = pd;
1248 mr->uobject = NULL;
1249 atomic_inc(&pd->usecnt);
1250 atomic_set(&mr->usecnt, 0);
1251 }
1252
1253 return mr;
1254}
d9f272c5 1255EXPORT_SYMBOL(ib_alloc_mr);
00f7ec36
SW		 1256
1257struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1258 int max_page_list_len)
1259{
1260 struct ib_fast_reg_page_list *page_list;
1261
1262 if (!device->alloc_fast_reg_page_list)
1263 return ERR_PTR(-ENOSYS);
1264
1265 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1266
1267 if (!IS_ERR(page_list)) {
1268 page_list->device = device;
1269 page_list->max_page_list_len = max_page_list_len;
1270 }
1271
1272 return page_list;
1273}
1274EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1275
1276void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1277{
1278 page_list->device->free_fast_reg_page_list(page_list);
1279}
1280EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1281
1da177e4
LT		 1282/* Memory windows */
1283
7083e42e 1284struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1da177e4
LT		 1285{
1286 struct ib_mw *mw;
1287
1288 if (!pd->device->alloc_mw)
1289 return ERR_PTR(-ENOSYS);
1290
7083e42e 1291 mw = pd->device->alloc_mw(pd, type);
1da177e4 1292 if (!IS_ERR(mw)) {
b5e81bf5
RD		 1293 mw->device = pd->device;
1294 mw->pd = pd;
1295 mw->uobject = NULL;
7083e42e 1296 mw->type = type;
1da177e4
LT		 1297 atomic_inc(&pd->usecnt);
1298 }
1299
1300 return mw;
1301}
1302EXPORT_SYMBOL(ib_alloc_mw);
1303
1304int ib_dealloc_mw(struct ib_mw *mw)
1305{
1306 struct ib_pd *pd;
1307 int ret;
1308
1309 pd = mw->pd;
1310 ret = mw->device->dealloc_mw(mw);
1311 if (!ret)
1312 atomic_dec(&pd->usecnt);
1313
1314 return ret;
1315}
1316EXPORT_SYMBOL(ib_dealloc_mw);
1317
1318/* "Fast" memory regions */
1319
1320struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1321 int mr_access_flags,
1322 struct ib_fmr_attr *fmr_attr)
1323{
1324 struct ib_fmr *fmr;
1325
1326 if (!pd->device->alloc_fmr)
1327 return ERR_PTR(-ENOSYS);
1328
1329 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1330 if (!IS_ERR(fmr)) {
1331 fmr->device = pd->device;
1332 fmr->pd = pd;
1333 atomic_inc(&pd->usecnt);
1334 }
1335
1336 return fmr;
1337}
1338EXPORT_SYMBOL(ib_alloc_fmr);
1339
1340int ib_unmap_fmr(struct list_head *fmr_list)
1341{
1342 struct ib_fmr *fmr;
1343
1344 if (list_empty(fmr_list))
1345 return 0;
1346
1347 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1348 return fmr->device->unmap_fmr(fmr_list);
1349}
1350EXPORT_SYMBOL(ib_unmap_fmr);
1351
1352int ib_dealloc_fmr(struct ib_fmr *fmr)
1353{
1354 struct ib_pd *pd;
1355 int ret;
1356
1357 pd = fmr->pd;
1358 ret = fmr->device->dealloc_fmr(fmr);
1359 if (!ret)
1360 atomic_dec(&pd->usecnt);
1361
1362 return ret;
1363}
1364EXPORT_SYMBOL(ib_dealloc_fmr);
1365
1366/* Multicast groups */
1367
1368int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1369{
c3bccbfb
OG		 1370 int ret;
1371
0c33aeed
JM		 1372 if (!qp->device->attach_mcast)
1373 return -ENOSYS;
1374 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1375 return -EINVAL;
1376
c3bccbfb
OG		 1377 ret = qp->device->attach_mcast(qp, gid, lid);
1378 if (!ret)
1379 atomic_inc(&qp->usecnt);
1380 return ret;
1da177e4
LT		 1381}
1382EXPORT_SYMBOL(ib_attach_mcast);
1383
1384int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1385{
c3bccbfb
OG		 1386 int ret;
1387
0c33aeed
JM		 1388 if (!qp->device->detach_mcast)
1389 return -ENOSYS;
1390 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1391 return -EINVAL;
1392
c3bccbfb
OG		 1393 ret = qp->device->detach_mcast(qp, gid, lid);
1394 if (!ret)
1395 atomic_dec(&qp->usecnt);
1396 return ret;
1da177e4
LT		 1397}
1398EXPORT_SYMBOL(ib_detach_mcast);
59991f94
SH		 1399
1400struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1401{
1402 struct ib_xrcd *xrcd;
1403
1404 if (!device->alloc_xrcd)
1405 return ERR_PTR(-ENOSYS);
1406
1407 xrcd = device->alloc_xrcd(device, NULL, NULL);
1408 if (!IS_ERR(xrcd)) {
1409 xrcd->device = device;
53d0bd1e 1410 xrcd->inode = NULL;
59991f94 1411 atomic_set(&xrcd->usecnt, 0);
d3d72d90
SH		 1412 mutex_init(&xrcd->tgt_qp_mutex);
1413 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
59991f94
SH		 1414 }
1415
1416 return xrcd;
1417}
1418EXPORT_SYMBOL(ib_alloc_xrcd);
1419
1420int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1421{
d3d72d90
SH		 1422 struct ib_qp *qp;
1423 int ret;
1424
59991f94
SH		 1425 if (atomic_read(&xrcd->usecnt))
1426 return -EBUSY;
1427
d3d72d90
SH		 1428 while (!list_empty(&xrcd->tgt_qp_list)) {
1429 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1430 ret = ib_destroy_qp(qp);
1431 if (ret)
1432 return ret;
1433 }
1434
59991f94
SH		 1435 return xrcd->device->dealloc_xrcd(xrcd);
1436}
1437EXPORT_SYMBOL(ib_dealloc_xrcd);
319a441d
HHZ		 1438
1439struct ib_flow *ib_create_flow(struct ib_qp *qp,
1440 struct ib_flow_attr *flow_attr,
1441 int domain)
1442{
1443 struct ib_flow *flow_id;
1444 if (!qp->device->create_flow)
1445 return ERR_PTR(-ENOSYS);
1446
1447 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1448 if (!IS_ERR(flow_id))
1449 atomic_inc(&qp->usecnt);
1450 return flow_id;
1451}
1452EXPORT_SYMBOL(ib_create_flow);
1453
1454int ib_destroy_flow(struct ib_flow *flow_id)
1455{
1456 int err;
1457 struct ib_qp *qp = flow_id->qp;
1458
1459 err = qp->device->destroy_flow(flow_id);
1460 if (!err)
1461 atomic_dec(&qp->usecnt);
1462 return err;
1463}
1464EXPORT_SYMBOL(ib_destroy_flow);
1b01d335
SG		 1465
1466int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1467 struct ib_mr_status *mr_status)
1468{
1469 return mr->device->check_mr_status ?
1470 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1471}
1472EXPORT_SYMBOL(ib_check_mr_status);
Linux 6.x block layer and io_uring tree(s)