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IB/cm: Fix a recently introduced deadlock
[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>
dbf727de
MB		 44#include <linux/in.h>
45#include <linux/in6.h>
46#include <net/addrconf.h>
1da177e4 47
a4d61e84
RD		 48#include <rdma/ib_verbs.h>
49#include <rdma/ib_cache.h>
dd5f03be 50#include <rdma/ib_addr.h>
1da177e4 51
ed4c54e5 52#include "core_priv.h"
1da177e4 53
2b1b5b60
SG		 54static const char * const ib_events[] = {
55 [IB_EVENT_CQ_ERR] = "CQ error",
56 [IB_EVENT_QP_FATAL] = "QP fatal error",
57 [IB_EVENT_QP_REQ_ERR] = "QP request error",
58 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
59 [IB_EVENT_COMM_EST] = "communication established",
60 [IB_EVENT_SQ_DRAINED] = "send queue drained",
61 [IB_EVENT_PATH_MIG] = "path migration successful",
62 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
63 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
64 [IB_EVENT_PORT_ACTIVE] = "port active",
65 [IB_EVENT_PORT_ERR] = "port error",
66 [IB_EVENT_LID_CHANGE] = "LID change",
67 [IB_EVENT_PKEY_CHANGE] = "P_key change",
68 [IB_EVENT_SM_CHANGE] = "SM change",
69 [IB_EVENT_SRQ_ERR] = "SRQ error",
70 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
71 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
72 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
73 [IB_EVENT_GID_CHANGE] = "GID changed",
74};
75
db7489e0 76const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
2b1b5b60
SG		 77{
78 size_t index = event;
79
80 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
81 ib_events[index] : "unrecognized event";
82}
83EXPORT_SYMBOL(ib_event_msg);
84
85static const char * const wc_statuses[] = {
86 [IB_WC_SUCCESS] = "success",
87 [IB_WC_LOC_LEN_ERR] = "local length error",
88 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
89 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
90 [IB_WC_LOC_PROT_ERR] = "local protection error",
91 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
92 [IB_WC_MW_BIND_ERR] = "memory management operation error",
93 [IB_WC_BAD_RESP_ERR] = "bad response error",
94 [IB_WC_LOC_ACCESS_ERR] = "local access error",
95 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
96 [IB_WC_REM_ACCESS_ERR] = "remote access error",
97 [IB_WC_REM_OP_ERR] = "remote operation error",
98 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
99 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
100 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
101 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
102 [IB_WC_REM_ABORT_ERR] = "operation aborted",
103 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
104 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
105 [IB_WC_FATAL_ERR] = "fatal error",
106 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
107 [IB_WC_GENERAL_ERR] = "general error",
108};
109
db7489e0 110const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
2b1b5b60
SG		 111{
112 size_t index = status;
113
114 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
115 wc_statuses[index] : "unrecognized status";
116}
117EXPORT_SYMBOL(ib_wc_status_msg);
118
8385fd84 119__attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
bf6a9e31
JM		 120{
121 switch (rate) {
122 case IB_RATE_2_5_GBPS: return 1;
123 case IB_RATE_5_GBPS: return 2;
124 case IB_RATE_10_GBPS: return 4;
125 case IB_RATE_20_GBPS: return 8;
126 case IB_RATE_30_GBPS: return 12;
127 case IB_RATE_40_GBPS: return 16;
128 case IB_RATE_60_GBPS: return 24;
129 case IB_RATE_80_GBPS: return 32;
130 case IB_RATE_120_GBPS: return 48;
131 default: return -1;
132 }
133}
134EXPORT_SYMBOL(ib_rate_to_mult);
135
8385fd84 136__attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
bf6a9e31
JM		 137{
138 switch (mult) {
139 case 1: return IB_RATE_2_5_GBPS;
140 case 2: return IB_RATE_5_GBPS;
141 case 4: return IB_RATE_10_GBPS;
142 case 8: return IB_RATE_20_GBPS;
143 case 12: return IB_RATE_30_GBPS;
144 case 16: return IB_RATE_40_GBPS;
145 case 24: return IB_RATE_60_GBPS;
146 case 32: return IB_RATE_80_GBPS;
147 case 48: return IB_RATE_120_GBPS;
148 default: return IB_RATE_PORT_CURRENT;
149 }
150}
151EXPORT_SYMBOL(mult_to_ib_rate);
152
8385fd84 153__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
71eeba16
MA		 154{
155 switch (rate) {
156 case IB_RATE_2_5_GBPS: return 2500;
157 case IB_RATE_5_GBPS: return 5000;
158 case IB_RATE_10_GBPS: return 10000;
159 case IB_RATE_20_GBPS: return 20000;
160 case IB_RATE_30_GBPS: return 30000;
161 case IB_RATE_40_GBPS: return 40000;
162 case IB_RATE_60_GBPS: return 60000;
163 case IB_RATE_80_GBPS: return 80000;
164 case IB_RATE_120_GBPS: return 120000;
165 case IB_RATE_14_GBPS: return 14062;
166 case IB_RATE_56_GBPS: return 56250;
167 case IB_RATE_112_GBPS: return 112500;
168 case IB_RATE_168_GBPS: return 168750;
169 case IB_RATE_25_GBPS: return 25781;
170 case IB_RATE_100_GBPS: return 103125;
171 case IB_RATE_200_GBPS: return 206250;
172 case IB_RATE_300_GBPS: return 309375;
173 default: return -1;
174 }
175}
176EXPORT_SYMBOL(ib_rate_to_mbps);
177
8385fd84 178__attribute_const__ enum rdma_transport_type
07ebafba
TT		 179rdma_node_get_transport(enum rdma_node_type node_type)
180{
181 switch (node_type) {
182 case RDMA_NODE_IB_CA:
183 case RDMA_NODE_IB_SWITCH:
184 case RDMA_NODE_IB_ROUTER:
185 return RDMA_TRANSPORT_IB;
186 case RDMA_NODE_RNIC:
187 return RDMA_TRANSPORT_IWARP;
180771a3 188 case RDMA_NODE_USNIC:
5db5765e
UM		 189 return RDMA_TRANSPORT_USNIC;
190 case RDMA_NODE_USNIC_UDP:
248567f7 191 return RDMA_TRANSPORT_USNIC_UDP;
07ebafba
TT		 192 default:
193 BUG();
194 return 0;
195 }
196}
197EXPORT_SYMBOL(rdma_node_get_transport);
198
a3f5adaf
EC		 199enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
200{
201 if (device->get_link_layer)
202 return device->get_link_layer(device, port_num);
203
204 switch (rdma_node_get_transport(device->node_type)) {
205 case RDMA_TRANSPORT_IB:
206 return IB_LINK_LAYER_INFINIBAND;
207 case RDMA_TRANSPORT_IWARP:
180771a3 208 case RDMA_TRANSPORT_USNIC:
248567f7 209 case RDMA_TRANSPORT_USNIC_UDP:
a3f5adaf
EC		 210 return IB_LINK_LAYER_ETHERNET;
211 default:
212 return IB_LINK_LAYER_UNSPECIFIED;
213 }
214}
215EXPORT_SYMBOL(rdma_port_get_link_layer);
216
1da177e4
LT		 217/* Protection domains */
218
96249d70
JG		 219/**
220 * ib_alloc_pd - Allocates an unused protection domain.
221 * @device: The device on which to allocate the protection domain.
222 *
223 * A protection domain object provides an association between QPs, shared
224 * receive queues, address handles, memory regions, and memory windows.
225 *
226 * Every PD has a local_dma_lkey which can be used as the lkey value for local
227 * memory operations.
228 */
1da177e4
LT		 229struct ib_pd *ib_alloc_pd(struct ib_device *device)
230{
231 struct ib_pd *pd;
232
b5e81bf5 233 pd = device->alloc_pd(device, NULL, NULL);
96249d70
JG		 234 if (IS_ERR(pd))
235 return pd;
1da177e4 236
96249d70
JG		 237 pd->device = device;
238 pd->uobject = NULL;
239 pd->local_mr = NULL;
240 atomic_set(&pd->usecnt, 0);
1da177e4 241
86bee4c9 242 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
96249d70
JG		 243 pd->local_dma_lkey = device->local_dma_lkey;
244 else {
245 struct ib_mr *mr;
246
247 mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE);
248 if (IS_ERR(mr)) {
249 ib_dealloc_pd(pd);
250 return (struct ib_pd *)mr;
251 }
1da177e4 252
96249d70
JG		 253 pd->local_mr = mr;
254 pd->local_dma_lkey = pd->local_mr->lkey;
1da177e4 255 }
1da177e4
LT		 256 return pd;
257}
258EXPORT_SYMBOL(ib_alloc_pd);
259
7dd78647
JG		 260/**
261 * ib_dealloc_pd - Deallocates a protection domain.
262 * @pd: The protection domain to deallocate.
263 *
264 * It is an error to call this function while any resources in the pd still
265 * exist. The caller is responsible to synchronously destroy them and
266 * guarantee no new allocations will happen.
267 */
268void ib_dealloc_pd(struct ib_pd *pd)
1da177e4 269{
7dd78647
JG		 270 int ret;
271
96249d70 272 if (pd->local_mr) {
7dd78647
JG		 273 ret = ib_dereg_mr(pd->local_mr);
274 WARN_ON(ret);
96249d70
JG		 275 pd->local_mr = NULL;
276 }
1da177e4 277
7dd78647
JG		 278 /* uverbs manipulates usecnt with proper locking, while the kabi
279 requires the caller to guarantee we can't race here. */
280 WARN_ON(atomic_read(&pd->usecnt));
1da177e4 281
7dd78647
JG		 282 /* Making delalloc_pd a void return is a WIP, no driver should return
283 an error here. */
284 ret = pd->device->dealloc_pd(pd);
285 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
1da177e4
LT		 286}
287EXPORT_SYMBOL(ib_dealloc_pd);
288
289/* Address handles */
290
291struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
292{
293 struct ib_ah *ah;
294
295 ah = pd->device->create_ah(pd, ah_attr);
296
297 if (!IS_ERR(ah)) {
b5e81bf5
RD		 298 ah->device = pd->device;
299 ah->pd = pd;
300 ah->uobject = NULL;
1da177e4
LT		 301 atomic_inc(&pd->usecnt);
302 }
303
304 return ah;
305}
306EXPORT_SYMBOL(ib_create_ah);
307
c865f246
SK		 308static int ib_get_header_version(const union rdma_network_hdr *hdr)
309{
310 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh;
311 struct iphdr ip4h_checked;
312 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh;
313
314 /* If it's IPv6, the version must be 6, otherwise, the first
315 * 20 bytes (before the IPv4 header) are garbled.
316 */
317 if (ip6h->version != 6)
318 return (ip4h->version == 4) ? 4 : 0;
319 /* version may be 6 or 4 because the first 20 bytes could be garbled */
320
321 /* RoCE v2 requires no options, thus header length
322 * must be 5 words
323 */
324 if (ip4h->ihl != 5)
325 return 6;
326
327 /* Verify checksum.
328 * We can't write on scattered buffers so we need to copy to
329 * temp buffer.
330 */
331 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
332 ip4h_checked.check = 0;
333 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5);
334 /* if IPv4 header checksum is OK, believe it */
335 if (ip4h->check == ip4h_checked.check)
336 return 4;
337 return 6;
338}
339
340static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
341 u8 port_num,
342 const struct ib_grh *grh)
343{
344 int grh_version;
345
346 if (rdma_protocol_ib(device, port_num))
347 return RDMA_NETWORK_IB;
348
349 grh_version = ib_get_header_version((union rdma_network_hdr *)grh);
350
351 if (grh_version == 4)
352 return RDMA_NETWORK_IPV4;
353
354 if (grh->next_hdr == IPPROTO_UDP)
355 return RDMA_NETWORK_IPV6;
356
357 return RDMA_NETWORK_ROCE_V1;
358}
359
dbf727de
MB		 360struct find_gid_index_context {
361 u16 vlan_id;
c865f246 362 enum ib_gid_type gid_type;
dbf727de
MB		 363};
364
365static bool find_gid_index(const union ib_gid *gid,
366 const struct ib_gid_attr *gid_attr,
367 void *context)
368{
369 struct find_gid_index_context *ctx =
370 (struct find_gid_index_context *)context;
371
c865f246
SK		 372 if (ctx->gid_type != gid_attr->gid_type)
373 return false;
374
dbf727de
MB		 375 if ((!!(ctx->vlan_id != 0xffff) == !is_vlan_dev(gid_attr->ndev)) ||
376 (is_vlan_dev(gid_attr->ndev) &&
377 vlan_dev_vlan_id(gid_attr->ndev) != ctx->vlan_id))
378 return false;
379
380 return true;
381}
382
383static int get_sgid_index_from_eth(struct ib_device *device, u8 port_num,
384 u16 vlan_id, const union ib_gid *sgid,
c865f246 385 enum ib_gid_type gid_type,
dbf727de
MB		 386 u16 *gid_index)
387{
c865f246
SK		 388 struct find_gid_index_context context = {.vlan_id = vlan_id,
389 .gid_type = gid_type};
dbf727de
MB		 390
391 return ib_find_gid_by_filter(device, sgid, port_num, find_gid_index,
392 &context, gid_index);
393}
394
c865f246
SK		 395static int get_gids_from_rdma_hdr(union rdma_network_hdr *hdr,
396 enum rdma_network_type net_type,
397 union ib_gid *sgid, union ib_gid *dgid)
398{
399 struct sockaddr_in src_in;
400 struct sockaddr_in dst_in;
401 __be32 src_saddr, dst_saddr;
402
403 if (!sgid || !dgid)
404 return -EINVAL;
405
406 if (net_type == RDMA_NETWORK_IPV4) {
407 memcpy(&src_in.sin_addr.s_addr,
408 &hdr->roce4grh.saddr, 4);
409 memcpy(&dst_in.sin_addr.s_addr,
410 &hdr->roce4grh.daddr, 4);
411 src_saddr = src_in.sin_addr.s_addr;
412 dst_saddr = dst_in.sin_addr.s_addr;
413 ipv6_addr_set_v4mapped(src_saddr,
414 (struct in6_addr *)sgid);
415 ipv6_addr_set_v4mapped(dst_saddr,
416 (struct in6_addr *)dgid);
417 return 0;
418 } else if (net_type == RDMA_NETWORK_IPV6 ||
419 net_type == RDMA_NETWORK_IB) {
420 *dgid = hdr->ibgrh.dgid;
421 *sgid = hdr->ibgrh.sgid;
422 return 0;
423 } else {
424 return -EINVAL;
425 }
426}
427
73cdaaee
IW		 428int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
429 const struct ib_wc *wc, const struct ib_grh *grh,
430 struct ib_ah_attr *ah_attr)
513789ed 431{
513789ed
HR		 432 u32 flow_class;
433 u16 gid_index;
434 int ret;
c865f246
SK		 435 enum rdma_network_type net_type = RDMA_NETWORK_IB;
436 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
437 union ib_gid dgid;
438 union ib_gid sgid;
513789ed 439
4e00d694 440 memset(ah_attr, 0, sizeof *ah_attr);
227128fc 441 if (rdma_cap_eth_ah(device, port_num)) {
c865f246
SK		 442 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
443 net_type = wc->network_hdr_type;
444 else
445 net_type = ib_get_net_type_by_grh(device, port_num, grh);
446 gid_type = ib_network_to_gid_type(net_type);
447 }
448 ret = get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
449 &sgid, &dgid);
450 if (ret)
451 return ret;
452
453 if (rdma_protocol_roce(device, port_num)) {
20029832 454 int if_index = 0;
dbf727de
MB		 455 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
456 wc->vlan_id : 0xffff;
20029832
MB		 457 struct net_device *idev;
458 struct net_device *resolved_dev;
dbf727de 459
dd5f03be
MB		 460 if (!(wc->wc_flags & IB_WC_GRH))
461 return -EPROTOTYPE;
462
20029832
MB		 463 if (!device->get_netdev)
464 return -EOPNOTSUPP;
465
466 idev = device->get_netdev(device, port_num);
467 if (!idev)
468 return -ENODEV;
469
470 ret = rdma_addr_find_dmac_by_grh(&dgid, &sgid,
471 ah_attr->dmac,
472 wc->wc_flags & IB_WC_WITH_VLAN ?
473 NULL : &vlan_id,
474 &if_index);
475 if (ret) {
476 dev_put(idev);
477 return ret;
dd5f03be 478 }
dbf727de 479
20029832
MB		 480 resolved_dev = dev_get_by_index(&init_net, if_index);
481 if (resolved_dev->flags & IFF_LOOPBACK) {
482 dev_put(resolved_dev);
483 resolved_dev = idev;
484 dev_hold(resolved_dev);
485 }
486 rcu_read_lock();
487 if (resolved_dev != idev && !rdma_is_upper_dev_rcu(idev,
488 resolved_dev))
489 ret = -EHOSTUNREACH;
490 rcu_read_unlock();
491 dev_put(idev);
492 dev_put(resolved_dev);
493 if (ret)
494 return ret;
495
dbf727de 496 ret = get_sgid_index_from_eth(device, port_num, vlan_id,
c865f246 497 &dgid, gid_type, &gid_index);
dbf727de
MB		 498 if (ret)
499 return ret;
dd5f03be
MB		 500 }
501
4e00d694
SH		 502 ah_attr->dlid = wc->slid;
503 ah_attr->sl = wc->sl;
504 ah_attr->src_path_bits = wc->dlid_path_bits;
505 ah_attr->port_num = port_num;
513789ed
HR		 506
507 if (wc->wc_flags & IB_WC_GRH) {
4e00d694 508 ah_attr->ah_flags = IB_AH_GRH;
c865f246 509 ah_attr->grh.dgid = sgid;
513789ed 510
dbf727de 511 if (!rdma_cap_eth_ah(device, port_num)) {
c865f246 512 ret = ib_find_cached_gid_by_port(device, &dgid,
b39ffa1d 513 IB_GID_TYPE_IB,
dbf727de
MB		 514 port_num, NULL,
515 &gid_index);
516 if (ret)
517 return ret;
518 }
513789ed 519
4e00d694 520 ah_attr->grh.sgid_index = (u8) gid_index;
497677ab 521 flow_class = be32_to_cpu(grh->version_tclass_flow);
4e00d694 522 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
47645d8d 523 ah_attr->grh.hop_limit = 0xFF;
4e00d694 524 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
513789ed 525 }
4e00d694
SH		 526 return 0;
527}
528EXPORT_SYMBOL(ib_init_ah_from_wc);
529
73cdaaee
IW		 530struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
531 const struct ib_grh *grh, u8 port_num)
4e00d694
SH		 532{
533 struct ib_ah_attr ah_attr;
534 int ret;
535
536 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
537 if (ret)
538 return ERR_PTR(ret);
513789ed
HR		 539
540 return ib_create_ah(pd, &ah_attr);
541}
542EXPORT_SYMBOL(ib_create_ah_from_wc);
543
1da177e4
LT		 544int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
545{
546 return ah->device->modify_ah ?
547 ah->device->modify_ah(ah, ah_attr) :
548 -ENOSYS;
549}
550EXPORT_SYMBOL(ib_modify_ah);
551
552int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
553{
554 return ah->device->query_ah ?
555 ah->device->query_ah(ah, ah_attr) :
556 -ENOSYS;
557}
558EXPORT_SYMBOL(ib_query_ah);
559
560int ib_destroy_ah(struct ib_ah *ah)
561{
562 struct ib_pd *pd;
563 int ret;
564
565 pd = ah->pd;
566 ret = ah->device->destroy_ah(ah);
567 if (!ret)
568 atomic_dec(&pd->usecnt);
569
570 return ret;
571}
572EXPORT_SYMBOL(ib_destroy_ah);
573
d41fcc67
RD		 574/* Shared receive queues */
575
576struct ib_srq *ib_create_srq(struct ib_pd *pd,
577 struct ib_srq_init_attr *srq_init_attr)
578{
579 struct ib_srq *srq;
580
581 if (!pd->device->create_srq)
582 return ERR_PTR(-ENOSYS);
583
584 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
585
586 if (!IS_ERR(srq)) {
587 srq->device = pd->device;
588 srq->pd = pd;
589 srq->uobject = NULL;
590 srq->event_handler = srq_init_attr->event_handler;
591 srq->srq_context = srq_init_attr->srq_context;
96104eda 592 srq->srq_type = srq_init_attr->srq_type;
418d5130
SH		 593 if (srq->srq_type == IB_SRQT_XRC) {
594 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
595 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
596 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
597 atomic_inc(&srq->ext.xrc.cq->usecnt);
598 }
d41fcc67
RD		 599 atomic_inc(&pd->usecnt);
600 atomic_set(&srq->usecnt, 0);
601 }
602
603 return srq;
604}
605EXPORT_SYMBOL(ib_create_srq);
606
607int ib_modify_srq(struct ib_srq *srq,
608 struct ib_srq_attr *srq_attr,
609 enum ib_srq_attr_mask srq_attr_mask)
610{
7ce5eacb
DB		 611 return srq->device->modify_srq ?
612 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
613 -ENOSYS;
d41fcc67
RD		 614}
615EXPORT_SYMBOL(ib_modify_srq);
616
617int ib_query_srq(struct ib_srq *srq,
618 struct ib_srq_attr *srq_attr)
619{
620 return srq->device->query_srq ?
621 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
622}
623EXPORT_SYMBOL(ib_query_srq);
624
625int ib_destroy_srq(struct ib_srq *srq)
626{
627 struct ib_pd *pd;
418d5130
SH		 628 enum ib_srq_type srq_type;
629 struct ib_xrcd *uninitialized_var(xrcd);
630 struct ib_cq *uninitialized_var(cq);
d41fcc67
RD		 631 int ret;
632
633 if (atomic_read(&srq->usecnt))
634 return -EBUSY;
635
636 pd = srq->pd;
418d5130
SH		 637 srq_type = srq->srq_type;
638 if (srq_type == IB_SRQT_XRC) {
639 xrcd = srq->ext.xrc.xrcd;
640 cq = srq->ext.xrc.cq;
641 }
d41fcc67
RD		 642
643 ret = srq->device->destroy_srq(srq);
418d5130 644 if (!ret) {
d41fcc67 645 atomic_dec(&pd->usecnt);
418d5130
SH		 646 if (srq_type == IB_SRQT_XRC) {
647 atomic_dec(&xrcd->usecnt);
648 atomic_dec(&cq->usecnt);
649 }
650 }
d41fcc67
RD		 651
652 return ret;
653}
654EXPORT_SYMBOL(ib_destroy_srq);
655
1da177e4
LT		 656/* Queue pairs */
657
0e0ec7e0
SH		 658static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
659{
660 struct ib_qp *qp = context;
73c40c61 661 unsigned long flags;
0e0ec7e0 662
73c40c61 663 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
0e0ec7e0 664 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
eec9e29f
SP		 665 if (event->element.qp->event_handler)
666 event->element.qp->event_handler(event, event->element.qp->qp_context);
73c40c61 667 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
0e0ec7e0
SH		 668}
669
d3d72d90
SH		 670static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
671{
672 mutex_lock(&xrcd->tgt_qp_mutex);
673 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
674 mutex_unlock(&xrcd->tgt_qp_mutex);
675}
676
0e0ec7e0
SH		 677static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
678 void (*event_handler)(struct ib_event *, void *),
679 void *qp_context)
d3d72d90 680{
0e0ec7e0
SH		 681 struct ib_qp *qp;
682 unsigned long flags;
683
684 qp = kzalloc(sizeof *qp, GFP_KERNEL);
685 if (!qp)
686 return ERR_PTR(-ENOMEM);
687
688 qp->real_qp = real_qp;
689 atomic_inc(&real_qp->usecnt);
690 qp->device = real_qp->device;
691 qp->event_handler = event_handler;
692 qp->qp_context = qp_context;
693 qp->qp_num = real_qp->qp_num;
694 qp->qp_type = real_qp->qp_type;
695
696 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
697 list_add(&qp->open_list, &real_qp->open_list);
698 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
699
700 return qp;
701}
702
703struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
704 struct ib_qp_open_attr *qp_open_attr)
705{
706 struct ib_qp *qp, *real_qp;
707
708 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
709 return ERR_PTR(-EINVAL);
710
711 qp = ERR_PTR(-EINVAL);
d3d72d90 712 mutex_lock(&xrcd->tgt_qp_mutex);
0e0ec7e0
SH		 713 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
714 if (real_qp->qp_num == qp_open_attr->qp_num) {
715 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
716 qp_open_attr->qp_context);
717 break;
718 }
719 }
d3d72d90 720 mutex_unlock(&xrcd->tgt_qp_mutex);
0e0ec7e0 721 return qp;
d3d72d90 722}
0e0ec7e0 723EXPORT_SYMBOL(ib_open_qp);
d3d72d90 724
1da177e4
LT		 725struct ib_qp *ib_create_qp(struct ib_pd *pd,
726 struct ib_qp_init_attr *qp_init_attr)
727{
0e0ec7e0 728 struct ib_qp *qp, *real_qp;
b42b63cf 729 struct ib_device *device;
1da177e4 730
b42b63cf
SH		 731 device = pd ? pd->device : qp_init_attr->xrcd->device;
732 qp = device->create_qp(pd, qp_init_attr, NULL);
1da177e4
LT		 733
734 if (!IS_ERR(qp)) {
0e0ec7e0
SH		 735 qp->device = device;
736 qp->real_qp = qp;
737 qp->uobject = NULL;
738 qp->qp_type = qp_init_attr->qp_type;
b42b63cf 739
e47e321a 740 atomic_set(&qp->usecnt, 0);
b42b63cf 741 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
0e0ec7e0
SH		 742 qp->event_handler = __ib_shared_qp_event_handler;
743 qp->qp_context = qp;
b42b63cf
SH		 744 qp->pd = NULL;
745 qp->send_cq = qp->recv_cq = NULL;
746 qp->srq = NULL;
747 qp->xrcd = qp_init_attr->xrcd;
748 atomic_inc(&qp_init_attr->xrcd->usecnt);
0e0ec7e0 749 INIT_LIST_HEAD(&qp->open_list);
0e0ec7e0
SH		 750
751 real_qp = qp;
752 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
753 qp_init_attr->qp_context);
754 if (!IS_ERR(qp))
755 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
756 else
757 real_qp->device->destroy_qp(real_qp);
b42b63cf 758 } else {
0e0ec7e0
SH		 759 qp->event_handler = qp_init_attr->event_handler;
760 qp->qp_context = qp_init_attr->qp_context;
b42b63cf
SH		 761 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
762 qp->recv_cq = NULL;
763 qp->srq = NULL;
764 } else {
765 qp->recv_cq = qp_init_attr->recv_cq;
766 atomic_inc(&qp_init_attr->recv_cq->usecnt);
767 qp->srq = qp_init_attr->srq;
768 if (qp->srq)
769 atomic_inc(&qp_init_attr->srq->usecnt);
770 }
771
772 qp->pd = pd;
773 qp->send_cq = qp_init_attr->send_cq;
774 qp->xrcd = NULL;
775
776 atomic_inc(&pd->usecnt);
777 atomic_inc(&qp_init_attr->send_cq->usecnt);
778 }
1da177e4
LT		 779 }
780
781 return qp;
782}
783EXPORT_SYMBOL(ib_create_qp);
784
8a51866f
RD		 785static const struct {
786 int valid;
b42b63cf
SH		 787 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
788 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
8a51866f
RD		 789} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
790 [IB_QPS_RESET] = {
791 [IB_QPS_RESET] = { .valid = 1 },
8a51866f
RD		 792 [IB_QPS_INIT] = {
793 .valid = 1,
794 .req_param = {
795 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
796 IB_QP_PORT |
797 IB_QP_QKEY),
c938a616 798 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
8a51866f
RD		 799 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
800 IB_QP_PORT |
801 IB_QP_ACCESS_FLAGS),
802 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
803 IB_QP_PORT |
804 IB_QP_ACCESS_FLAGS),
b42b63cf
SH		 805 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
806 IB_QP_PORT |
807 IB_QP_ACCESS_FLAGS),
808 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
809 IB_QP_PORT |
810 IB_QP_ACCESS_FLAGS),
8a51866f
RD		 811 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
812 IB_QP_QKEY),
813 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
814 IB_QP_QKEY),
815 }
816 },
817 },
818 [IB_QPS_INIT] = {
819 [IB_QPS_RESET] = { .valid = 1 },
820 [IB_QPS_ERR] = { .valid = 1 },
821 [IB_QPS_INIT] = {
822 .valid = 1,
823 .opt_param = {
824 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
825 IB_QP_PORT |
826 IB_QP_QKEY),
827 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
828 IB_QP_PORT |
829 IB_QP_ACCESS_FLAGS),
830 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
831 IB_QP_PORT |
832 IB_QP_ACCESS_FLAGS),
b42b63cf
SH		 833 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
834 IB_QP_PORT |
835 IB_QP_ACCESS_FLAGS),
836 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
837 IB_QP_PORT |
838 IB_QP_ACCESS_FLAGS),
8a51866f
RD		 839 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
840 IB_QP_QKEY),
841 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
842 IB_QP_QKEY),
843 }
844 },
845 [IB_QPS_RTR] = {
846 .valid = 1,
847 .req_param = {
848 [IB_QPT_UC] = (IB_QP_AV |
849 IB_QP_PATH_MTU |
850 IB_QP_DEST_QPN |
851 IB_QP_RQ_PSN),
852 [IB_QPT_RC] = (IB_QP_AV |
853 IB_QP_PATH_MTU |
854 IB_QP_DEST_QPN |
855 IB_QP_RQ_PSN |
856 IB_QP_MAX_DEST_RD_ATOMIC |
857 IB_QP_MIN_RNR_TIMER),
b42b63cf
SH		 858 [IB_QPT_XRC_INI] = (IB_QP_AV |
859 IB_QP_PATH_MTU |
860 IB_QP_DEST_QPN |
861 IB_QP_RQ_PSN),
862 [IB_QPT_XRC_TGT] = (IB_QP_AV |
863 IB_QP_PATH_MTU |
864 IB_QP_DEST_QPN |
865 IB_QP_RQ_PSN |
866 IB_QP_MAX_DEST_RD_ATOMIC |
867 IB_QP_MIN_RNR_TIMER),
8a51866f
RD		 868 },
869 .opt_param = {
870 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
871 IB_QP_QKEY),
872 [IB_QPT_UC] = (IB_QP_ALT_PATH |
873 IB_QP_ACCESS_FLAGS |
874 IB_QP_PKEY_INDEX),
875 [IB_QPT_RC] = (IB_QP_ALT_PATH |
876 IB_QP_ACCESS_FLAGS |
877 IB_QP_PKEY_INDEX),
b42b63cf
SH		 878 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
879 IB_QP_ACCESS_FLAGS |
880 IB_QP_PKEY_INDEX),
881 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
882 IB_QP_ACCESS_FLAGS |
883 IB_QP_PKEY_INDEX),
8a51866f
RD		 884 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
885 IB_QP_QKEY),
886 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
887 IB_QP_QKEY),
dd5f03be 888 },
dbf727de 889 },
8a51866f
RD		 890 },
891 [IB_QPS_RTR] = {
892 [IB_QPS_RESET] = { .valid = 1 },
893 [IB_QPS_ERR] = { .valid = 1 },
894 [IB_QPS_RTS] = {
895 .valid = 1,
896 .req_param = {
897 [IB_QPT_UD] = IB_QP_SQ_PSN,
898 [IB_QPT_UC] = IB_QP_SQ_PSN,
899 [IB_QPT_RC] = (IB_QP_TIMEOUT |
900 IB_QP_RETRY_CNT |
901 IB_QP_RNR_RETRY |
902 IB_QP_SQ_PSN |
903 IB_QP_MAX_QP_RD_ATOMIC),
b42b63cf
SH		 904 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
905 IB_QP_RETRY_CNT |
906 IB_QP_RNR_RETRY |
907 IB_QP_SQ_PSN |
908 IB_QP_MAX_QP_RD_ATOMIC),
909 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
910 IB_QP_SQ_PSN),
8a51866f
RD		 911 [IB_QPT_SMI] = IB_QP_SQ_PSN,
912 [IB_QPT_GSI] = IB_QP_SQ_PSN,
913 },
914 .opt_param = {
915 [IB_QPT_UD] = (IB_QP_CUR_STATE |
916 IB_QP_QKEY),
917 [IB_QPT_UC] = (IB_QP_CUR_STATE |
918 IB_QP_ALT_PATH |
919 IB_QP_ACCESS_FLAGS |
920 IB_QP_PATH_MIG_STATE),
921 [IB_QPT_RC] = (IB_QP_CUR_STATE |
922 IB_QP_ALT_PATH |
923 IB_QP_ACCESS_FLAGS |
924 IB_QP_MIN_RNR_TIMER |
925 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 926 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
927 IB_QP_ALT_PATH |
928 IB_QP_ACCESS_FLAGS |
929 IB_QP_PATH_MIG_STATE),
930 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
931 IB_QP_ALT_PATH |
932 IB_QP_ACCESS_FLAGS |
933 IB_QP_MIN_RNR_TIMER |
934 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 935 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
936 IB_QP_QKEY),
937 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
938 IB_QP_QKEY),
939 }
940 }
941 },
942 [IB_QPS_RTS] = {
943 [IB_QPS_RESET] = { .valid = 1 },
944 [IB_QPS_ERR] = { .valid = 1 },
945 [IB_QPS_RTS] = {
946 .valid = 1,
947 .opt_param = {
948 [IB_QPT_UD] = (IB_QP_CUR_STATE |
949 IB_QP_QKEY),
4546d31d
DB		 950 [IB_QPT_UC] = (IB_QP_CUR_STATE |
951 IB_QP_ACCESS_FLAGS |
8a51866f
RD		 952 IB_QP_ALT_PATH |
953 IB_QP_PATH_MIG_STATE),
4546d31d
DB		 954 [IB_QPT_RC] = (IB_QP_CUR_STATE |
955 IB_QP_ACCESS_FLAGS |
8a51866f
RD		 956 IB_QP_ALT_PATH |
957 IB_QP_PATH_MIG_STATE |
958 IB_QP_MIN_RNR_TIMER),
b42b63cf
SH		 959 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
960 IB_QP_ACCESS_FLAGS |
961 IB_QP_ALT_PATH |
962 IB_QP_PATH_MIG_STATE),
963 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
964 IB_QP_ACCESS_FLAGS |
965 IB_QP_ALT_PATH |
966 IB_QP_PATH_MIG_STATE |
967 IB_QP_MIN_RNR_TIMER),
8a51866f
RD		 968 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
969 IB_QP_QKEY),
970 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
971 IB_QP_QKEY),
972 }
973 },
974 [IB_QPS_SQD] = {
975 .valid = 1,
976 .opt_param = {
977 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
978 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
979 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
b42b63cf
SH		 980 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
981 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
8a51866f
RD		 982 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
983 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
984 }
985 },
986 },
987 [IB_QPS_SQD] = {
988 [IB_QPS_RESET] = { .valid = 1 },
989 [IB_QPS_ERR] = { .valid = 1 },
990 [IB_QPS_RTS] = {
991 .valid = 1,
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),
b42b63cf
SH		 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),
8a51866f
RD		 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 }
1018 },
1019 [IB_QPS_SQD] = {
1020 .valid = 1,
1021 .opt_param = {
1022 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1023 IB_QP_QKEY),
1024 [IB_QPT_UC] = (IB_QP_AV |
8a51866f
RD		 1025 IB_QP_ALT_PATH |
1026 IB_QP_ACCESS_FLAGS |
1027 IB_QP_PKEY_INDEX |
1028 IB_QP_PATH_MIG_STATE),
1029 [IB_QPT_RC] = (IB_QP_PORT |
1030 IB_QP_AV |
1031 IB_QP_TIMEOUT |
1032 IB_QP_RETRY_CNT |
1033 IB_QP_RNR_RETRY |
1034 IB_QP_MAX_QP_RD_ATOMIC |
1035 IB_QP_MAX_DEST_RD_ATOMIC |
8a51866f
RD		 1036 IB_QP_ALT_PATH |
1037 IB_QP_ACCESS_FLAGS |
1038 IB_QP_PKEY_INDEX |
1039 IB_QP_MIN_RNR_TIMER |
1040 IB_QP_PATH_MIG_STATE),
b42b63cf
SH		 1041 [IB_QPT_XRC_INI] = (IB_QP_PORT |
1042 IB_QP_AV |
1043 IB_QP_TIMEOUT |
1044 IB_QP_RETRY_CNT |
1045 IB_QP_RNR_RETRY |
1046 IB_QP_MAX_QP_RD_ATOMIC |
1047 IB_QP_ALT_PATH |
1048 IB_QP_ACCESS_FLAGS |
1049 IB_QP_PKEY_INDEX |
1050 IB_QP_PATH_MIG_STATE),
1051 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
1052 IB_QP_AV |
1053 IB_QP_TIMEOUT |
1054 IB_QP_MAX_DEST_RD_ATOMIC |
1055 IB_QP_ALT_PATH |
1056 IB_QP_ACCESS_FLAGS |
1057 IB_QP_PKEY_INDEX |
1058 IB_QP_MIN_RNR_TIMER |
1059 IB_QP_PATH_MIG_STATE),
8a51866f
RD		 1060 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1061 IB_QP_QKEY),
1062 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1063 IB_QP_QKEY),
1064 }
1065 }
1066 },
1067 [IB_QPS_SQE] = {
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_ACCESS_FLAGS),
1077 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1078 IB_QP_QKEY),
1079 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1080 IB_QP_QKEY),
1081 }
1082 }
1083 },
1084 [IB_QPS_ERR] = {
1085 [IB_QPS_RESET] = { .valid = 1 },
1086 [IB_QPS_ERR] = { .valid = 1 }
1087 }
1088};
1089
1090int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
dd5f03be
MB		 1091 enum ib_qp_type type, enum ib_qp_attr_mask mask,
1092 enum rdma_link_layer ll)
8a51866f
RD		 1093{
1094 enum ib_qp_attr_mask req_param, opt_param;
1095
1096 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
1097 next_state < 0 || next_state > IB_QPS_ERR)
1098 return 0;
1099
1100 if (mask & IB_QP_CUR_STATE &&
1101 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
1102 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
1103 return 0;
1104
1105 if (!qp_state_table[cur_state][next_state].valid)
1106 return 0;
1107
1108 req_param = qp_state_table[cur_state][next_state].req_param[type];
1109 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
1110
1111 if ((mask & req_param) != req_param)
1112 return 0;
1113
1114 if (mask & ~(req_param | opt_param | IB_QP_STATE))
1115 return 0;
1116
1117 return 1;
1118}
1119EXPORT_SYMBOL(ib_modify_qp_is_ok);
1120
dbf727de
MB		 1121int ib_resolve_eth_dmac(struct ib_qp *qp,
1122 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
ed4c54e5
OG		 1123{
1124 int ret = 0;
ed4c54e5 1125
dbf727de
MB		 1126 if (*qp_attr_mask & IB_QP_AV) {
1127 if (qp_attr->ah_attr.port_num < rdma_start_port(qp->device) ||
1128 qp_attr->ah_attr.port_num > rdma_end_port(qp->device))
1129 return -EINVAL;
1130
1131 if (!rdma_cap_eth_ah(qp->device, qp_attr->ah_attr.port_num))
1132 return 0;
1133
ed4c54e5 1134 if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
dbf727de
MB		 1135 rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw,
1136 qp_attr->ah_attr.dmac);
ed4c54e5 1137 } else {
dbf727de
MB		 1138 union ib_gid sgid;
1139 struct ib_gid_attr sgid_attr;
1140 int ifindex;
1141
1142 ret = ib_query_gid(qp->device,
1143 qp_attr->ah_attr.port_num,
1144 qp_attr->ah_attr.grh.sgid_index,
1145 &sgid, &sgid_attr);
1146
1147 if (ret || !sgid_attr.ndev) {
1148 if (!ret)
1149 ret = -ENXIO;
ed4c54e5 1150 goto out;
dbf727de 1151 }
c865f246
SK		 1152 if (sgid_attr.gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
1153 /* TODO: get the hoplimit from the inet/inet6
1154 * device
1155 */
1156 qp_attr->ah_attr.grh.hop_limit =
1157 IPV6_DEFAULT_HOPLIMIT;
dbf727de
MB		 1158
1159 ifindex = sgid_attr.ndev->ifindex;
1160
1161 ret = rdma_addr_find_dmac_by_grh(&sgid,
1162 &qp_attr->ah_attr.grh.dgid,
1163 qp_attr->ah_attr.dmac,
20029832 1164 NULL, &ifindex);
dbf727de
MB		 1165
1166 dev_put(sgid_attr.ndev);
ed4c54e5 1167 }
ed4c54e5
OG		 1168 }
1169out:
1170 return ret;
1171}
dbf727de 1172EXPORT_SYMBOL(ib_resolve_eth_dmac);
ed4c54e5
OG		 1173
1174
1da177e4
LT		 1175int ib_modify_qp(struct ib_qp *qp,
1176 struct ib_qp_attr *qp_attr,
1177 int qp_attr_mask)
1178{
ed4c54e5
OG		 1179 int ret;
1180
dbf727de 1181 ret = ib_resolve_eth_dmac(qp, qp_attr, &qp_attr_mask);
ed4c54e5
OG		 1182 if (ret)
1183 return ret;
1184
0e0ec7e0 1185 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1da177e4
LT		 1186}
1187EXPORT_SYMBOL(ib_modify_qp);
1188
1189int ib_query_qp(struct ib_qp *qp,
1190 struct ib_qp_attr *qp_attr,
1191 int qp_attr_mask,
1192 struct ib_qp_init_attr *qp_init_attr)
1193{
1194 return qp->device->query_qp ?
0e0ec7e0 1195 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1da177e4
LT		 1196 -ENOSYS;
1197}
1198EXPORT_SYMBOL(ib_query_qp);
1199
0e0ec7e0
SH		 1200int ib_close_qp(struct ib_qp *qp)
1201{
1202 struct ib_qp *real_qp;
1203 unsigned long flags;
1204
1205 real_qp = qp->real_qp;
1206 if (real_qp == qp)
1207 return -EINVAL;
1208
1209 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1210 list_del(&qp->open_list);
1211 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1212
1213 atomic_dec(&real_qp->usecnt);
1214 kfree(qp);
1215
1216 return 0;
1217}
1218EXPORT_SYMBOL(ib_close_qp);
1219
1220static int __ib_destroy_shared_qp(struct ib_qp *qp)
1221{
1222 struct ib_xrcd *xrcd;
1223 struct ib_qp *real_qp;
1224 int ret;
1225
1226 real_qp = qp->real_qp;
1227 xrcd = real_qp->xrcd;
1228
1229 mutex_lock(&xrcd->tgt_qp_mutex);
1230 ib_close_qp(qp);
1231 if (atomic_read(&real_qp->usecnt) == 0)
1232 list_del(&real_qp->xrcd_list);
1233 else
1234 real_qp = NULL;
1235 mutex_unlock(&xrcd->tgt_qp_mutex);
1236
1237 if (real_qp) {
1238 ret = ib_destroy_qp(real_qp);
1239 if (!ret)
1240 atomic_dec(&xrcd->usecnt);
1241 else
1242 __ib_insert_xrcd_qp(xrcd, real_qp);
1243 }
1244
1245 return 0;
1246}
1247
1da177e4
LT		 1248int ib_destroy_qp(struct ib_qp *qp)
1249{
1250 struct ib_pd *pd;
1251 struct ib_cq *scq, *rcq;
1252 struct ib_srq *srq;
1253 int ret;
1254
0e0ec7e0
SH		 1255 if (atomic_read(&qp->usecnt))
1256 return -EBUSY;
1257
1258 if (qp->real_qp != qp)
1259 return __ib_destroy_shared_qp(qp);
1260
b42b63cf
SH		 1261 pd = qp->pd;
1262 scq = qp->send_cq;
1263 rcq = qp->recv_cq;
1264 srq = qp->srq;
1da177e4
LT		 1265
1266 ret = qp->device->destroy_qp(qp);
1267 if (!ret) {
b42b63cf
SH		 1268 if (pd)
1269 atomic_dec(&pd->usecnt);
1270 if (scq)
1271 atomic_dec(&scq->usecnt);
1272 if (rcq)
1273 atomic_dec(&rcq->usecnt);
1da177e4
LT		 1274 if (srq)
1275 atomic_dec(&srq->usecnt);
1276 }
1277
1278 return ret;
1279}
1280EXPORT_SYMBOL(ib_destroy_qp);
1281
1282/* Completion queues */
1283
1284struct ib_cq *ib_create_cq(struct ib_device *device,
1285 ib_comp_handler comp_handler,
1286 void (*event_handler)(struct ib_event *, void *),
8e37210b
MB		 1287 void *cq_context,
1288 const struct ib_cq_init_attr *cq_attr)
1da177e4
LT		 1289{
1290 struct ib_cq *cq;
1291
8e37210b 1292 cq = device->create_cq(device, cq_attr, NULL, NULL);
1da177e4
LT		 1293
1294 if (!IS_ERR(cq)) {
1295 cq->device = device;
b5e81bf5 1296 cq->uobject = NULL;
1da177e4
LT		 1297 cq->comp_handler = comp_handler;
1298 cq->event_handler = event_handler;
1299 cq->cq_context = cq_context;
1300 atomic_set(&cq->usecnt, 0);
1301 }
1302
1303 return cq;
1304}
1305EXPORT_SYMBOL(ib_create_cq);
1306
2dd57162
EC		 1307int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1308{
1309 return cq->device->modify_cq ?
1310 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1311}
1312EXPORT_SYMBOL(ib_modify_cq);
1313
1da177e4
LT		 1314int ib_destroy_cq(struct ib_cq *cq)
1315{
1316 if (atomic_read(&cq->usecnt))
1317 return -EBUSY;
1318
1319 return cq->device->destroy_cq(cq);
1320}
1321EXPORT_SYMBOL(ib_destroy_cq);
1322
a74cd4af 1323int ib_resize_cq(struct ib_cq *cq, int cqe)
1da177e4 1324{
40de2e54 1325 return cq->device->resize_cq ?
33b9b3ee 1326 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1da177e4
LT		 1327}
1328EXPORT_SYMBOL(ib_resize_cq);
1329
1330/* Memory regions */
1331
1332struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
1333{
1334 struct ib_mr *mr;
1c636f80
EC		 1335 int err;
1336
1337 err = ib_check_mr_access(mr_access_flags);
1338 if (err)
1339 return ERR_PTR(err);
1da177e4
LT		 1340
1341 mr = pd->device->get_dma_mr(pd, mr_access_flags);
1342
1343 if (!IS_ERR(mr)) {
b5e81bf5
RD		 1344 mr->device = pd->device;
1345 mr->pd = pd;
1346 mr->uobject = NULL;
1da177e4 1347 atomic_inc(&pd->usecnt);
1da177e4
LT		 1348 }
1349
1350 return mr;
1351}
1352EXPORT_SYMBOL(ib_get_dma_mr);
1353
1da177e4
LT		 1354int ib_dereg_mr(struct ib_mr *mr)
1355{
ab67ed8d 1356 struct ib_pd *pd = mr->pd;
1da177e4
LT		 1357 int ret;
1358
1da177e4
LT		 1359 ret = mr->device->dereg_mr(mr);
1360 if (!ret)
1361 atomic_dec(&pd->usecnt);
1362
1363 return ret;
1364}
1365EXPORT_SYMBOL(ib_dereg_mr);
1366
9bee178b
SG		 1367/**
1368 * ib_alloc_mr() - Allocates a memory region
1369 * @pd: protection domain associated with the region
1370 * @mr_type: memory region type
1371 * @max_num_sg: maximum sg entries available for registration.
1372 *
1373 * Notes:
1374 * Memory registeration page/sg lists must not exceed max_num_sg.
1375 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
1376 * max_num_sg * used_page_size.
1377 *
1378 */
1379struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
1380 enum ib_mr_type mr_type,
1381 u32 max_num_sg)
00f7ec36
SW		 1382{
1383 struct ib_mr *mr;
1384
d9f272c5 1385 if (!pd->device->alloc_mr)
00f7ec36
SW		 1386 return ERR_PTR(-ENOSYS);
1387
d9f272c5 1388 mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
00f7ec36
SW		 1389 if (!IS_ERR(mr)) {
1390 mr->device = pd->device;
1391 mr->pd = pd;
1392 mr->uobject = NULL;
1393 atomic_inc(&pd->usecnt);
00f7ec36
SW		 1394 }
1395
1396 return mr;
1397}
d9f272c5 1398EXPORT_SYMBOL(ib_alloc_mr);
00f7ec36 1399
1da177e4
LT		 1400/* "Fast" memory regions */
1401
1402struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1403 int mr_access_flags,
1404 struct ib_fmr_attr *fmr_attr)
1405{
1406 struct ib_fmr *fmr;
1407
1408 if (!pd->device->alloc_fmr)
1409 return ERR_PTR(-ENOSYS);
1410
1411 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1412 if (!IS_ERR(fmr)) {
1413 fmr->device = pd->device;
1414 fmr->pd = pd;
1415 atomic_inc(&pd->usecnt);
1416 }
1417
1418 return fmr;
1419}
1420EXPORT_SYMBOL(ib_alloc_fmr);
1421
1422int ib_unmap_fmr(struct list_head *fmr_list)
1423{
1424 struct ib_fmr *fmr;
1425
1426 if (list_empty(fmr_list))
1427 return 0;
1428
1429 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1430 return fmr->device->unmap_fmr(fmr_list);
1431}
1432EXPORT_SYMBOL(ib_unmap_fmr);
1433
1434int ib_dealloc_fmr(struct ib_fmr *fmr)
1435{
1436 struct ib_pd *pd;
1437 int ret;
1438
1439 pd = fmr->pd;
1440 ret = fmr->device->dealloc_fmr(fmr);
1441 if (!ret)
1442 atomic_dec(&pd->usecnt);
1443
1444 return ret;
1445}
1446EXPORT_SYMBOL(ib_dealloc_fmr);
1447
1448/* Multicast groups */
1449
1450int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1451{
c3bccbfb
OG		 1452 int ret;
1453
0c33aeed
JM		 1454 if (!qp->device->attach_mcast)
1455 return -ENOSYS;
1456 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1457 return -EINVAL;
1458
c3bccbfb
OG		 1459 ret = qp->device->attach_mcast(qp, gid, lid);
1460 if (!ret)
1461 atomic_inc(&qp->usecnt);
1462 return ret;
1da177e4
LT		 1463}
1464EXPORT_SYMBOL(ib_attach_mcast);
1465
1466int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1467{
c3bccbfb
OG		 1468 int ret;
1469
0c33aeed
JM		 1470 if (!qp->device->detach_mcast)
1471 return -ENOSYS;
1472 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1473 return -EINVAL;
1474
c3bccbfb
OG		 1475 ret = qp->device->detach_mcast(qp, gid, lid);
1476 if (!ret)
1477 atomic_dec(&qp->usecnt);
1478 return ret;
1da177e4
LT		 1479}
1480EXPORT_SYMBOL(ib_detach_mcast);
59991f94
SH		 1481
1482struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1483{
1484 struct ib_xrcd *xrcd;
1485
1486 if (!device->alloc_xrcd)
1487 return ERR_PTR(-ENOSYS);
1488
1489 xrcd = device->alloc_xrcd(device, NULL, NULL);
1490 if (!IS_ERR(xrcd)) {
1491 xrcd->device = device;
53d0bd1e 1492 xrcd->inode = NULL;
59991f94 1493 atomic_set(&xrcd->usecnt, 0);
d3d72d90
SH		 1494 mutex_init(&xrcd->tgt_qp_mutex);
1495 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
59991f94
SH		 1496 }
1497
1498 return xrcd;
1499}
1500EXPORT_SYMBOL(ib_alloc_xrcd);
1501
1502int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1503{
d3d72d90
SH		 1504 struct ib_qp *qp;
1505 int ret;
1506
59991f94
SH		 1507 if (atomic_read(&xrcd->usecnt))
1508 return -EBUSY;
1509
d3d72d90
SH		 1510 while (!list_empty(&xrcd->tgt_qp_list)) {
1511 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1512 ret = ib_destroy_qp(qp);
1513 if (ret)
1514 return ret;
1515 }
1516
59991f94
SH		 1517 return xrcd->device->dealloc_xrcd(xrcd);
1518}
1519EXPORT_SYMBOL(ib_dealloc_xrcd);
319a441d
HHZ		 1520
1521struct ib_flow *ib_create_flow(struct ib_qp *qp,
1522 struct ib_flow_attr *flow_attr,
1523 int domain)
1524{
1525 struct ib_flow *flow_id;
1526 if (!qp->device->create_flow)
1527 return ERR_PTR(-ENOSYS);
1528
1529 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1530 if (!IS_ERR(flow_id))
1531 atomic_inc(&qp->usecnt);
1532 return flow_id;
1533}
1534EXPORT_SYMBOL(ib_create_flow);
1535
1536int ib_destroy_flow(struct ib_flow *flow_id)
1537{
1538 int err;
1539 struct ib_qp *qp = flow_id->qp;
1540
1541 err = qp->device->destroy_flow(flow_id);
1542 if (!err)
1543 atomic_dec(&qp->usecnt);
1544 return err;
1545}
1546EXPORT_SYMBOL(ib_destroy_flow);
1b01d335
SG		 1547
1548int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1549 struct ib_mr_status *mr_status)
1550{
1551 return mr->device->check_mr_status ?
1552 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1553}
1554EXPORT_SYMBOL(ib_check_mr_status);
4c67e2bf
SG		 1555
1556/**
1557 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
1558 * and set it the memory region.
1559 * @mr: memory region
1560 * @sg: dma mapped scatterlist
1561 * @sg_nents: number of entries in sg
1562 * @page_size: page vector desired page size
1563 *
1564 * Constraints:
1565 * - The first sg element is allowed to have an offset.
1566 * - Each sg element must be aligned to page_size (or physically
1567 * contiguous to the previous element). In case an sg element has a
1568 * non contiguous offset, the mapping prefix will not include it.
1569 * - The last sg element is allowed to have length less than page_size.
1570 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
1571 * then only max_num_sg entries will be mapped.
1572 *
1573 * Returns the number of sg elements that were mapped to the memory region.
1574 *
1575 * After this completes successfully, the memory region
1576 * is ready for registration.
1577 */
1578int ib_map_mr_sg(struct ib_mr *mr,
1579 struct scatterlist *sg,
1580 int sg_nents,
1581 unsigned int page_size)
1582{
1583 if (unlikely(!mr->device->map_mr_sg))
1584 return -ENOSYS;
1585
1586 mr->page_size = page_size;
1587
1588 return mr->device->map_mr_sg(mr, sg, sg_nents);
1589}
1590EXPORT_SYMBOL(ib_map_mr_sg);
1591
1592/**
1593 * ib_sg_to_pages() - Convert the largest prefix of a sg list
1594 * to a page vector
1595 * @mr: memory region
1596 * @sgl: dma mapped scatterlist
1597 * @sg_nents: number of entries in sg
1598 * @set_page: driver page assignment function pointer
1599 *
8f5ba10e 1600 * Core service helper for drivers to convert the largest
4c67e2bf
SG		 1601 * prefix of given sg list to a page vector. The sg list
1602 * prefix converted is the prefix that meet the requirements
1603 * of ib_map_mr_sg.
1604 *
1605 * Returns the number of sg elements that were assigned to
1606 * a page vector.
1607 */
1608int ib_sg_to_pages(struct ib_mr *mr,
1609 struct scatterlist *sgl,
1610 int sg_nents,
1611 int (*set_page)(struct ib_mr *, u64))
1612{
1613 struct scatterlist *sg;
b6aeb980 1614 u64 last_end_dma_addr = 0;
4c67e2bf
SG		 1615 unsigned int last_page_off = 0;
1616 u64 page_mask = ~((u64)mr->page_size - 1);
8f5ba10e 1617 int i, ret;
4c67e2bf
SG		 1618
1619 mr->iova = sg_dma_address(&sgl[0]);
1620 mr->length = 0;
1621
1622 for_each_sg(sgl, sg, sg_nents, i) {
1623 u64 dma_addr = sg_dma_address(sg);
1624 unsigned int dma_len = sg_dma_len(sg);
1625 u64 end_dma_addr = dma_addr + dma_len;
1626 u64 page_addr = dma_addr & page_mask;
1627
8f5ba10e
BVA		 1628 /*
1629 * For the second and later elements, check whether either the
1630 * end of element i-1 or the start of element i is not aligned
1631 * on a page boundary.
1632 */
1633 if (i && (last_page_off != 0 || page_addr != dma_addr)) {
1634 /* Stop mapping if there is a gap. */
1635 if (last_end_dma_addr != dma_addr)
1636 break;
1637
1638 /*
1639 * Coalesce this element with the last. If it is small
1640 * enough just update mr->length. Otherwise start
1641 * mapping from the next page.
1642 */
1643 goto next_page;
4c67e2bf
SG		 1644 }
1645
1646 do {
8f5ba10e
BVA		 1647 ret = set_page(mr, page_addr);
1648 if (unlikely(ret < 0))
1649 return i ? : ret;
1650next_page:
4c67e2bf
SG		 1651 page_addr += mr->page_size;
1652 } while (page_addr < end_dma_addr);
1653
1654 mr->length += dma_len;
1655 last_end_dma_addr = end_dma_addr;
4c67e2bf
SG		 1656 last_page_off = end_dma_addr & ~page_mask;
1657 }
1658
4c67e2bf
SG		 1659 return i;
1660}
1661EXPORT_SYMBOL(ib_sg_to_pages);
Linux 6.x block layer and io_uring tree(s)