1 /*
2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
3 */
4
5 /*
6 * This file contains code imported from the OFED rds source file ib_cm.c
7 * Oracle elects to have and use the contents of ib_cm.c under and governed
8 * by the OpenIB.org BSD license (see below for full license text). However,
9 * the following notice accompanied the original version of this file:
10 */
11
12 /*
13 * Copyright (c) 2006 Oracle. All rights reserved.
14 *
15 * This software is available to you under a choice of one of two
16 * licenses. You may choose to be licensed under the terms of the GNU
17 * General Public License (GPL) Version 2, available from the file
18 * COPYING in the main directory of this source tree, or the
19 * OpenIB.org BSD license below:
20 *
21 * Redistribution and use in source and binary forms, with or
22 * without modification, are permitted provided that the following
23 * conditions are met:
24 *
25 * - Redistributions of source code must retain the above
26 * copyright notice, this list of conditions and the following
27 * disclaimer.
28 *
29 * - Redistributions in binary form must reproduce the above
30 * copyright notice, this list of conditions and the following
31 * disclaimer in the documentation and/or other materials
32 * provided with the distribution.
33 *
34 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
35 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
36 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
37 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
38 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
39 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
40 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
41 * SOFTWARE.
42 *
43 */
44 #include <sys/rds.h>
45
46 #include <sys/ib/clients/of/ofed_kernel.h>
47 #include <sys/ib/clients/of/rdma/ib_addr.h>
48 #include <sys/ib/clients/of/rdma/rdma_cm.h>
49
50 #include <sys/ib/clients/rdsv3/rdsv3.h>
51 #include <sys/ib/clients/rdsv3/ib.h>
52 #include <sys/ib/clients/rdsv3/rdsv3_debug.h>
53
54 extern int rdsv3_enable_snd_cq;
55
56 /*
57 * Set the selected protocol version
58 */
59 static void
rdsv3_ib_set_protocol(struct rdsv3_connection * conn,unsigned int version)60 rdsv3_ib_set_protocol(struct rdsv3_connection *conn, unsigned int version)
61 {
62 RDSV3_DPRINTF4("rdsv3_ib_set_protocol", "conn: %p version: %d",
63 conn, version);
64 conn->c_version = version;
65 }
66
67 /*
68 * Set up flow control
69 */
70 static void
rdsv3_ib_set_flow_control(struct rdsv3_connection * conn,uint32_t credits)71 rdsv3_ib_set_flow_control(struct rdsv3_connection *conn, uint32_t credits)
72 {
73 struct rdsv3_ib_connection *ic = conn->c_transport_data;
74
75 RDSV3_DPRINTF2("rdsv3_ib_set_flow_control",
76 "Enter: conn: %p credits: %d", conn, credits);
77
78 if (rdsv3_ib_sysctl_flow_control && credits != 0) {
79 /* We're doing flow control */
80 ic->i_flowctl = 1;
81 rdsv3_ib_send_add_credits(conn, credits);
82 } else {
83 ic->i_flowctl = 0;
84 }
85
86 RDSV3_DPRINTF2("rdsv3_ib_set_flow_control",
87 "Return: conn: %p credits: %d",
88 conn, credits);
89 }
90
91 /*
92 * Tune RNR behavior. Without flow control, we use a rather
93 * low timeout, but not the absolute minimum - this should
94 * be tunable.
95 *
96 * We already set the RNR retry count to 7 (which is the
97 * smallest infinite number :-) above.
98 * If flow control is off, we want to change this back to 0
99 * so that we learn quickly when our credit accounting is
100 * buggy.
101 *
102 * Caller passes in a qp_attr pointer - don't waste stack spacv
103 * by allocation this twice.
104 */
105 static void
rdsv3_ib_tune_rnr(struct rdsv3_ib_connection * ic,struct ib_qp_attr * attr)106 rdsv3_ib_tune_rnr(struct rdsv3_ib_connection *ic, struct ib_qp_attr *attr)
107 {
108 int ret;
109
110 RDSV3_DPRINTF2("rdsv3_ib_tune_rnr", "Enter ic: %p attr: %p",
111 ic, attr);
112
113 attr->min_rnr_timer = IB_RNR_TIMER_000_32;
114 ret = ib_modify_qp(ic->i_cm_id->qp, attr, IB_QP_MIN_RNR_TIMER);
115 if (ret)
116 RDSV3_DPRINTF2("rdsv3_ib_tune_rnr",
117 "ib_modify_qp(IB_QP_MIN_RNR_TIMER): err=%d", -ret);
118 }
119
120 /*
121 * Connection established.
122 * We get here for both outgoing and incoming connection.
123 */
124 void
rdsv3_ib_cm_connect_complete(struct rdsv3_connection * conn,struct rdma_cm_event * event)125 rdsv3_ib_cm_connect_complete(struct rdsv3_connection *conn,
126 struct rdma_cm_event *event)
127 {
128 const struct rdsv3_ib_connect_private *dp = NULL;
129 struct rdsv3_ib_connection *ic = conn->c_transport_data;
130 struct rdsv3_ib_device *rds_ibdev =
131 ib_get_client_data(ic->i_cm_id->device, &rdsv3_ib_client);
132 struct ib_qp_attr qp_attr;
133 int err;
134
135 RDSV3_DPRINTF2("rdsv3_ib_cm_connect_complete",
136 "Enter conn: %p event: %p", conn, event);
137
138 if (event->param.conn.private_data_len >= sizeof (*dp)) {
139 dp = event->param.conn.private_data;
140
141 /* make sure it isn't empty data */
142 if (dp->dp_protocol_major) {
143 rdsv3_ib_set_protocol(conn,
144 RDS_PROTOCOL(dp->dp_protocol_major,
145 dp->dp_protocol_minor));
146 rdsv3_ib_set_flow_control(conn,
147 ntohl(dp->dp_credit));
148 }
149 }
150
151 if (conn->c_version < RDS_PROTOCOL(3, 1)) {
152 RDSV3_DPRINTF2("rdsv3_ib_cm_connect_complete",
153 "RDS/IB: Connection to %u.%u.%u.%u version %u.%u failed",
154 NIPQUAD(conn->c_faddr),
155 RDS_PROTOCOL_MAJOR(conn->c_version),
156 RDS_PROTOCOL_MINOR(conn->c_version));
157 rdsv3_conn_destroy(conn);
158 return;
159 } else {
160 RDSV3_DPRINTF2("rdsv3_ib_cm_connect_complete",
161 "RDS/IB: connected to %u.%u.%u.%u version %u.%u%s",
162 NIPQUAD(conn->c_faddr),
163 RDS_PROTOCOL_MAJOR(conn->c_version),
164 RDS_PROTOCOL_MINOR(conn->c_version),
165 ic->i_flowctl ? ", flow control" : "");
166 }
167
168 ASSERT(ic->i_soft_cq == NULL);
169 ic->i_soft_cq = rdsv3_af_intr_thr_create(rdsv3_ib_tasklet_fn,
170 (void *)ic, SCQ_INTR_BIND_CPU, rds_ibdev->aft_hcagp,
171 ic->i_cq->ibt_cq);
172 if (rdsv3_enable_snd_cq) {
173 ic->i_snd_soft_cq = rdsv3_af_intr_thr_create(
174 rdsv3_ib_snd_tasklet_fn,
175 (void *)ic, SCQ_INTR_BIND_CPU, rds_ibdev->aft_hcagp,
176 ic->i_snd_cq->ibt_cq);
177 }
178 /* rdsv3_ib_refill_fn is expecting i_max_recv_alloc set */
179 ic->i_max_recv_alloc = rdsv3_ib_sysctl_max_recv_allocation;
180 ic->i_refill_rq = rdsv3_af_thr_create(rdsv3_ib_refill_fn, (void *)conn,
181 SCQ_WRK_BIND_CPU, rds_ibdev->aft_hcagp);
182 rdsv3_af_grp_draw(rds_ibdev->aft_hcagp);
183
184 (void) ib_req_notify_cq(ic->i_cq, IB_CQ_SOLICITED);
185 if (rdsv3_enable_snd_cq) {
186 (void) ib_req_notify_cq(ic->i_snd_cq, IB_CQ_NEXT_COMP);
187 }
188
189 /*
190 * Init rings and fill recv. this needs to wait until protocol
191 * negotiation
192 * is complete, since ring layout is different from 3.0 to 3.1.
193 */
194 rdsv3_ib_send_init_ring(ic);
195 rdsv3_ib_recv_init_ring(ic);
196 /*
197 * Post receive buffers - as a side effect, this will update
198 * the posted credit count.
199 */
200 (void) rdsv3_ib_recv_refill(conn, 1);
201
202 /* Tune RNR behavior */
203 rdsv3_ib_tune_rnr(ic, &qp_attr);
204
205 qp_attr.qp_state = IB_QPS_RTS;
206 err = ib_modify_qp(ic->i_cm_id->qp, &qp_attr, IB_QP_STATE);
207 if (err)
208 RDSV3_DPRINTF2("rdsv3_ib_cm_connect_complete",
209 "ib_modify_qp(IB_QP_STATE, RTS): err=%d", err);
210
211 /* update ib_device with this local ipaddr & conn */
212 err = rdsv3_ib_update_ipaddr(rds_ibdev, conn->c_laddr);
213 if (err)
214 RDSV3_DPRINTF2("rdsv3_ib_cm_connect_complete",
215 "rdsv3_ib_update_ipaddr failed (%d)", err);
216 rdsv3_ib_add_conn(rds_ibdev, conn);
217
218 /*
219 * If the peer gave us the last packet it saw, process this as if
220 * we had received a regular ACK.
221 */
222 if (dp && dp->dp_ack_seq)
223 rdsv3_send_drop_acked(conn, ntohll(dp->dp_ack_seq), NULL);
224
225 rdsv3_connect_complete(conn);
226
227 RDSV3_DPRINTF2("rdsv3_ib_cm_connect_complete",
228 "Return conn: %p event: %p",
229 conn, event);
230 }
231
232 static void
rdsv3_ib_cm_fill_conn_param(struct rdsv3_connection * conn,struct rdma_conn_param * conn_param,struct rdsv3_ib_connect_private * dp,uint32_t protocol_version,uint32_t max_responder_resources,uint32_t max_initiator_depth)233 rdsv3_ib_cm_fill_conn_param(struct rdsv3_connection *conn,
234 struct rdma_conn_param *conn_param,
235 struct rdsv3_ib_connect_private *dp,
236 uint32_t protocol_version,
237 uint32_t max_responder_resources,
238 uint32_t max_initiator_depth)
239 {
240 struct rdsv3_ib_connection *ic = conn->c_transport_data;
241 struct rdsv3_ib_device *rds_ibdev;
242
243 RDSV3_DPRINTF2("rdsv3_ib_cm_fill_conn_param",
244 "Enter conn: %p conn_param: %p private: %p version: %d",
245 conn, conn_param, dp, protocol_version);
246
247 (void) memset(conn_param, 0, sizeof (struct rdma_conn_param));
248
249 rds_ibdev = ib_get_client_data(ic->i_cm_id->device, &rdsv3_ib_client);
250
251 conn_param->responder_resources =
252 MIN(rds_ibdev->max_responder_resources, max_responder_resources);
253 conn_param->initiator_depth =
254 MIN(rds_ibdev->max_initiator_depth, max_initiator_depth);
255 conn_param->retry_count = min(rdsv3_ib_retry_count, 7);
256 conn_param->rnr_retry_count = 7;
257
258 if (dp) {
259 (void) memset(dp, 0, sizeof (*dp));
260 dp->dp_saddr = conn->c_laddr;
261 dp->dp_daddr = conn->c_faddr;
262 dp->dp_protocol_major = RDS_PROTOCOL_MAJOR(protocol_version);
263 dp->dp_protocol_minor = RDS_PROTOCOL_MINOR(protocol_version);
264 dp->dp_protocol_minor_mask =
265 htons(RDSV3_IB_SUPPORTED_PROTOCOLS);
266 dp->dp_ack_seq = rdsv3_ib_piggyb_ack(ic);
267
268 /* Advertise flow control */
269 if (ic->i_flowctl) {
270 unsigned int credits;
271
272 credits = IB_GET_POST_CREDITS(
273 atomic_get(&ic->i_credits));
274 dp->dp_credit = htonl(credits);
275 atomic_add_32(&ic->i_credits,
276 -IB_SET_POST_CREDITS(credits));
277 }
278
279 conn_param->private_data = dp;
280 conn_param->private_data_len = sizeof (*dp);
281 }
282
283 RDSV3_DPRINTF2("rdsv3_ib_cm_fill_conn_param",
284 "Return conn: %p conn_param: %p private: %p version: %d",
285 conn, conn_param, dp, protocol_version);
286 }
287
288 static void
rdsv3_ib_cq_event_handler(struct ib_event * event,void * data)289 rdsv3_ib_cq_event_handler(struct ib_event *event, void *data)
290 {
291 RDSV3_DPRINTF3("rdsv3_ib_cq_event_handler", "event %u data %p",
292 event->event, data);
293 }
294
295 static void
rdsv3_ib_snd_cq_comp_handler(struct ib_cq * cq,void * context)296 rdsv3_ib_snd_cq_comp_handler(struct ib_cq *cq, void *context)
297 {
298 struct rdsv3_connection *conn = context;
299 struct rdsv3_ib_connection *ic = conn->c_transport_data;
300
301 RDSV3_DPRINTF4("rdsv3_ib_snd_cq_comp_handler",
302 "Enter(conn: %p ic: %p cq: %p)", conn, ic, cq);
303
304 rdsv3_af_thr_fire(ic->i_snd_soft_cq);
305 }
306
307 void
rdsv3_ib_snd_tasklet_fn(void * data)308 rdsv3_ib_snd_tasklet_fn(void *data)
309 {
310 struct rdsv3_ib_connection *ic = (struct rdsv3_ib_connection *)data;
311 struct rdsv3_connection *conn = ic->conn;
312 struct rdsv3_ib_ack_state ack_state = { 0, };
313 ibt_wc_t wc;
314 uint_t polled;
315
316 RDSV3_DPRINTF4("rdsv3_ib_snd_tasklet_fn",
317 "Enter(conn: %p ic: %p)", conn, ic);
318
319 /*
320 * Poll in a loop before and after enabling the next event
321 */
322 while (ibt_poll_cq(RDSV3_CQ2CQHDL(ic->i_snd_cq), &wc, 1, &polled) ==
323 IBT_SUCCESS) {
324 RDSV3_DPRINTF4("rdsv3_ib_snd_tasklet_fn",
325 "wc_id 0x%llx type %d status %u byte_len %u imm_data %u\n",
326 (unsigned long long)wc.wc_id, wc.wc_type, wc.wc_status,
327 wc.wc_bytes_xfer, ntohl(wc.wc_immed_data));
328
329 ASSERT(wc.wc_id & RDSV3_IB_SEND_OP);
330 rdsv3_ib_send_cqe_handler(ic, &wc);
331 }
332 (void) ibt_enable_cq_notify(RDSV3_CQ2CQHDL(ic->i_snd_cq),
333 IBT_NEXT_COMPLETION);
334 while (ibt_poll_cq(RDSV3_CQ2CQHDL(ic->i_snd_cq), &wc, 1, &polled) ==
335 IBT_SUCCESS) {
336 RDSV3_DPRINTF4("rdsv3_ib_snd_tasklet_fn",
337 "wc_id 0x%llx type %d status %u byte_len %u imm_data %u\n",
338 (unsigned long long)wc.wc_id, wc.wc_type, wc.wc_status,
339 wc.wc_bytes_xfer, ntohl(wc.wc_immed_data));
340
341 ASSERT(wc.wc_id & RDSV3_IB_SEND_OP);
342 rdsv3_ib_send_cqe_handler(ic, &wc);
343 }
344 }
345
346 static void
rdsv3_ib_cq_comp_handler(struct ib_cq * cq,void * context)347 rdsv3_ib_cq_comp_handler(struct ib_cq *cq, void *context)
348 {
349 struct rdsv3_connection *conn = context;
350 struct rdsv3_ib_connection *ic = conn->c_transport_data;
351
352 RDSV3_DPRINTF4("rdsv3_ib_cq_comp_handler",
353 "Enter(conn: %p cq: %p)", conn, cq);
354
355 rdsv3_ib_stats_inc(s_ib_evt_handler_call);
356
357 rdsv3_af_thr_fire(ic->i_soft_cq);
358 }
359
360 void
rdsv3_ib_refill_fn(void * data)361 rdsv3_ib_refill_fn(void *data)
362 {
363 struct rdsv3_connection *conn = (struct rdsv3_connection *)data;
364
365 (void) rdsv3_ib_recv_refill(conn, 0);
366 }
367
368 void
rdsv3_ib_tasklet_fn(void * data)369 rdsv3_ib_tasklet_fn(void *data)
370 {
371 struct rdsv3_ib_connection *ic = (struct rdsv3_ib_connection *)data;
372 struct rdsv3_connection *conn = ic->conn;
373 struct rdsv3_ib_ack_state ack_state = { 0, };
374 ibt_wc_t wc[RDSV3_IB_WC_POLL_SIZE];
375 uint_t polled;
376 int i;
377
378 RDSV3_DPRINTF4("rdsv3_ib_tasklet_fn",
379 "Enter(conn: %p ic: %p)", conn, ic);
380
381 rdsv3_ib_stats_inc(s_ib_tasklet_call);
382
383 /*
384 * Poll in a loop before and after enabling the next event
385 */
386 while (ibt_poll_cq(RDSV3_CQ2CQHDL(ic->i_cq), &wc[0],
387 RDSV3_IB_WC_POLL_SIZE, &polled) == IBT_SUCCESS) {
388 for (i = 0; i < polled; i++) {
389 RDSV3_DPRINTF4("rdsv3_ib_tasklet_fn",
390 "wc_id 0x%llx type %d status %u byte_len %u \
391 imm_data %u\n",
392 (unsigned long long)wc[i].wc_id, wc[i].wc_type,
393 wc[i].wc_status, wc[i].wc_bytes_xfer,
394 ntohl(wc[i].wc_immed_data));
395
396 if (wc[i].wc_id & RDSV3_IB_SEND_OP) {
397 rdsv3_ib_send_cqe_handler(ic, &wc[i]);
398 } else {
399 rdsv3_ib_recv_cqe_handler(ic, &wc[i],
400 &ack_state);
401 }
402 }
403 }
404 (void) ibt_enable_cq_notify(RDSV3_CQ2CQHDL(ic->i_cq),
405 IBT_NEXT_SOLICITED);
406 while (ibt_poll_cq(RDSV3_CQ2CQHDL(ic->i_cq), &wc[0],
407 RDSV3_IB_WC_POLL_SIZE, &polled) == IBT_SUCCESS) {
408 for (i = 0; i < polled; i++) {
409 RDSV3_DPRINTF4("rdsv3_ib_tasklet_fn",
410 "wc_id 0x%llx type %d status %u byte_len %u \
411 imm_data %u\n",
412 (unsigned long long)wc[i].wc_id, wc[i].wc_type,
413 wc[i].wc_status, wc[i].wc_bytes_xfer,
414 ntohl(wc[i].wc_immed_data));
415
416 if (wc[i].wc_id & RDSV3_IB_SEND_OP) {
417 rdsv3_ib_send_cqe_handler(ic, &wc[i]);
418 } else {
419 rdsv3_ib_recv_cqe_handler(ic, &wc[i],
420 &ack_state);
421 }
422 }
423 }
424
425 if (ack_state.ack_next_valid) {
426 rdsv3_ib_set_ack(ic, ack_state.ack_next,
427 ack_state.ack_required);
428 }
429 if (ack_state.ack_recv_valid && ack_state.ack_recv > ic->i_ack_recv) {
430 rdsv3_send_drop_acked(conn, ack_state.ack_recv, NULL);
431 ic->i_ack_recv = ack_state.ack_recv;
432 }
433 if (rdsv3_conn_up(conn)) {
434 if (!test_bit(RDSV3_LL_SEND_FULL, &conn->c_flags))
435 (void) rdsv3_send_xmit(ic->conn);
436 rdsv3_ib_attempt_ack(ic);
437 }
438 }
439
440 static void
rdsv3_ib_qp_event_handler(struct ib_event * event,void * data)441 rdsv3_ib_qp_event_handler(struct ib_event *event, void *data)
442 {
443 struct rdsv3_connection *conn = data;
444 struct rdsv3_ib_connection *ic = conn->c_transport_data;
445
446 RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler", "conn %p ic %p event %u",
447 conn, ic, event->event);
448
449 switch (event->event) {
450 case IB_EVENT_COMM_EST:
451 (void) rdma_notify(ic->i_cm_id, IB_EVENT_COMM_EST);
452 break;
453 default:
454 if (conn) {
455 RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler",
456 "RDS/IB: Fatal QP Event %u - "
457 "connection %u.%u.%u.%u ->%u.%u.%u.%u "
458 "...reconnecting",
459 event->event, NIPQUAD(conn->c_laddr),
460 NIPQUAD(conn->c_faddr));
461 rdsv3_conn_drop(conn);
462 } else {
463 RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler",
464 "RDS/IB: Fatal QP Event %u - connection"
465 "...reconnecting", event->event);
466 }
467 break;
468 }
469
470 RDSV3_DPRINTF2("rdsv3_ib_qp_event_handler", "Return conn: %p event: %p",
471 conn, event);
472 }
473
474 extern int rdsv3_ib_alloc_hdrs(ib_device_t *dev,
475 struct rdsv3_ib_connection *ic);
476 extern void rdsv3_ib_free_hdrs(ib_device_t *dev,
477 struct rdsv3_ib_connection *ic);
478
479 /*
480 * This needs to be very careful to not leave IS_ERR pointers around for
481 * cleanup to trip over.
482 */
483 static int
rdsv3_ib_setup_qp(struct rdsv3_connection * conn)484 rdsv3_ib_setup_qp(struct rdsv3_connection *conn)
485 {
486 struct rdsv3_ib_connection *ic = conn->c_transport_data;
487 struct ib_device *dev = ic->i_cm_id->device;
488 struct ib_qp_init_attr attr;
489 struct rdsv3_ib_device *rds_ibdev;
490 ibt_send_wr_t *wrp;
491 ibt_wr_ds_t *sgl;
492 int ret, i;
493
494 RDSV3_DPRINTF2("rdsv3_ib_setup_qp", "Enter conn: %p", conn);
495
496 /*
497 * rdsv3_ib_add_one creates a rdsv3_ib_device object per IB device,
498 * and allocates a protection domain, memory range and FMR pool
499 * for each. If that fails for any reason, it will not register
500 * the rds_ibdev at all.
501 */
502 rds_ibdev = ib_get_client_data(dev, &rdsv3_ib_client);
503 if (!rds_ibdev) {
504 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
505 "RDS/IB: No client_data for device %s", dev->name);
506 return (-EOPNOTSUPP);
507 }
508 ic->rds_ibdev = rds_ibdev;
509
510 if (rds_ibdev->max_wrs < ic->i_send_ring.w_nr + 1)
511 rdsv3_ib_ring_resize(&ic->i_send_ring, rds_ibdev->max_wrs - 1);
512 if (rds_ibdev->max_wrs < ic->i_recv_ring.w_nr + 1)
513 rdsv3_ib_ring_resize(&ic->i_recv_ring, rds_ibdev->max_wrs - 1);
514
515 /* Protection domain and memory range */
516 ic->i_pd = rds_ibdev->pd;
517
518 /*
519 * IB_CQ_VECTOR_LEAST_ATTACHED and/or the corresponding feature is
520 * not implmeneted in Hermon yet, but we can pass it to ib_create_cq()
521 * anyway.
522 */
523 ic->i_cq = ib_create_cq(dev, rdsv3_ib_cq_comp_handler,
524 rdsv3_ib_cq_event_handler, conn,
525 ic->i_recv_ring.w_nr + ic->i_send_ring.w_nr + 1,
526 rdsv3_af_grp_get_sched(ic->rds_ibdev->aft_hcagp));
527 if (IS_ERR(ic->i_cq)) {
528 ret = PTR_ERR(ic->i_cq);
529 ic->i_cq = NULL;
530 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
531 "ib_create_cq failed: %d", ret);
532 goto out;
533 }
534 if (rdsv3_enable_snd_cq) {
535 ic->i_snd_cq = ib_create_cq(dev, rdsv3_ib_snd_cq_comp_handler,
536 rdsv3_ib_cq_event_handler, conn, ic->i_send_ring.w_nr + 1,
537 rdsv3_af_grp_get_sched(ic->rds_ibdev->aft_hcagp));
538 if (IS_ERR(ic->i_snd_cq)) {
539 ret = PTR_ERR(ic->i_snd_cq);
540 (void) ib_destroy_cq(ic->i_cq);
541 ic->i_cq = NULL;
542 ic->i_snd_cq = NULL;
543 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
544 "ib_create_cq send cq failed: %d", ret);
545 goto out;
546 }
547 }
548
549 /* XXX negotiate max send/recv with remote? */
550 (void) memset(&attr, 0, sizeof (attr));
551 attr.event_handler = rdsv3_ib_qp_event_handler;
552 attr.qp_context = conn;
553 /* + 1 to allow for the single ack message */
554 attr.cap.max_send_wr = ic->i_send_ring.w_nr + 1;
555 attr.cap.max_recv_wr = ic->i_recv_ring.w_nr + 1;
556 attr.cap.max_send_sge = rds_ibdev->max_sge;
557 attr.cap.max_recv_sge = RDSV3_IB_RECV_SGE;
558 attr.sq_sig_type = IB_SIGNAL_REQ_WR;
559 attr.qp_type = IB_QPT_RC;
560 if (rdsv3_enable_snd_cq) {
561 attr.send_cq = ic->i_snd_cq;
562 } else {
563 attr.send_cq = ic->i_cq;
564 }
565 attr.recv_cq = ic->i_cq;
566
567 /*
568 * XXX this can fail if max_*_wr is too large? Are we supposed
569 * to back off until we get a value that the hardware can support?
570 */
571 ret = rdma_create_qp(ic->i_cm_id, ic->i_pd, &attr);
572 if (ret) {
573 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
574 "rdma_create_qp failed: %d", ret);
575 goto out;
576 }
577
578 ret = rdsv3_ib_alloc_hdrs(dev, ic);
579 if (ret != 0) {
580 ret = -ENOMEM;
581 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
582 "rdsv3_ib_alloc_hdrs failed: %d", ret);
583 goto out;
584 }
585
586 ic->i_sends = kmem_alloc(ic->i_send_ring.w_nr *
587 sizeof (struct rdsv3_ib_send_work), KM_NOSLEEP);
588 if (ic->i_sends == NULL) {
589 ret = -ENOMEM;
590 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
591 "send allocation failed: %d", ret);
592 goto out;
593 }
594 (void) memset(ic->i_sends, 0, ic->i_send_ring.w_nr *
595 sizeof (struct rdsv3_ib_send_work));
596
597 ic->i_send_wrs =
598 kmem_alloc(ic->i_send_ring.w_nr * (sizeof (ibt_send_wr_t) +
599 RDSV3_IB_MAX_SGE * sizeof (ibt_wr_ds_t)), KM_NOSLEEP);
600 if (ic->i_send_wrs == NULL) {
601 ret = -ENOMEM;
602 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
603 "Send WR allocation failed: %d", ret);
604 goto out;
605 }
606 sgl = (ibt_wr_ds_t *)((uint8_t *)ic->i_send_wrs +
607 (ic->i_send_ring.w_nr * sizeof (ibt_send_wr_t)));
608 for (i = 0; i < ic->i_send_ring.w_nr; i++) {
609 wrp = &ic->i_send_wrs[i];
610 wrp->wr_sgl = &sgl[i * RDSV3_IB_MAX_SGE];
611 }
612
613 ic->i_recvs = kmem_alloc(ic->i_recv_ring.w_nr *
614 sizeof (struct rdsv3_ib_recv_work), KM_NOSLEEP);
615 if (ic->i_recvs == NULL) {
616 ret = -ENOMEM;
617 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
618 "recv allocation failed: %d", ret);
619 goto out;
620 }
621 (void) memset(ic->i_recvs, 0, ic->i_recv_ring.w_nr *
622 sizeof (struct rdsv3_ib_recv_work));
623
624 ic->i_recv_wrs =
625 kmem_alloc(ic->i_recv_ring.w_nr * sizeof (ibt_recv_wr_t),
626 KM_NOSLEEP);
627 if (ic->i_recv_wrs == NULL) {
628 ret = -ENOMEM;
629 RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
630 "Recv WR allocation failed: %d", ret);
631 goto out;
632 }
633
634 rdsv3_ib_recv_init_ack(ic);
635
636 RDSV3_DPRINTF2("rdsv3_ib_setup_qp", "conn %p pd %p mr %p cq %p",
637 conn, ic->i_pd, ic->i_mr, ic->i_cq);
638
639 out:
640 return (ret);
641 }
642
643 static uint32_t
rdsv3_ib_protocol_compatible(struct rdma_cm_event * event)644 rdsv3_ib_protocol_compatible(struct rdma_cm_event *event)
645 {
646 const struct rdsv3_ib_connect_private *dp =
647 event->param.conn.private_data;
648 uint16_t common;
649 uint32_t version = 0;
650
651 RDSV3_DPRINTF2("rdsv3_ib_protocol_compatible", "Enter event: %p",
652 event);
653
654 /*
655 * rdma_cm private data is odd - when there is any private data in the
656 * request, we will be given a pretty large buffer without telling us
657 * the
658 * original size. The only way to tell the difference is by looking at
659 * the contents, which are initialized to zero.
660 * If the protocol version fields aren't set,
661 * this is a connection attempt
662 * from an older version. This could could be 3.0 or 2.0 -
663 * we can't tell.
664 * We really should have changed this for OFED 1.3 :-(
665 */
666
667 /* Be paranoid. RDS always has privdata */
668 if (!event->param.conn.private_data_len) {
669 RDSV3_DPRINTF2("rdsv3_ib_protocol_compatible",
670 "RDS incoming connection has no private data, rejecting");
671 return (0);
672 }
673
674 /* Even if len is crap *now* I still want to check it. -ASG */
675 if (event->param.conn.private_data_len < sizeof (*dp) ||
676 dp->dp_protocol_major == 0)
677 return (RDS_PROTOCOL_3_0);
678
679 common = ntohs(dp->dp_protocol_minor_mask) &
680 RDSV3_IB_SUPPORTED_PROTOCOLS;
681 if (dp->dp_protocol_major == 3 && common) {
682 version = RDS_PROTOCOL_3_0;
683 while ((common >>= 1) != 0)
684 version++;
685 } else {
686 RDSV3_DPRINTF2("rdsv3_ib_protocol_compatible",
687 "RDS: Connection from %u.%u.%u.%u using "
688 "incompatible protocol version %u.%u\n",
689 NIPQUAD(dp->dp_saddr),
690 dp->dp_protocol_major,
691 dp->dp_protocol_minor);
692 }
693
694 RDSV3_DPRINTF2("rdsv3_ib_protocol_compatible", "Return event: %p",
695 event);
696
697 return (version);
698 }
699
700 int
rdsv3_ib_cm_handle_connect(struct rdma_cm_id * cm_id,struct rdma_cm_event * event)701 rdsv3_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
702 struct rdma_cm_event *event)
703 {
704 uint64_be_t lguid = cm_id->route.path_rec->sgid.global.interface_id;
705 uint64_be_t fguid = cm_id->route.path_rec->dgid.global.interface_id;
706 const struct rdsv3_ib_connect_private *dp =
707 event->param.conn.private_data;
708 struct rdsv3_ib_connect_private dp_rep;
709 struct rdsv3_connection *conn = NULL;
710 struct rdsv3_ib_connection *ic = NULL;
711 struct rdma_conn_param conn_param;
712 uint32_t version;
713 int err, destroy = 1;
714 boolean_t conn_created = B_FALSE;
715
716 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
717 "Enter cm_id: %p event: %p", cm_id, event);
718
719 /* Check whether the remote protocol version matches ours. */
720 version = rdsv3_ib_protocol_compatible(event);
721 if (!version) {
722 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
723 "version mismatch");
724 goto out;
725 }
726
727 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
728 "saddr %u.%u.%u.%u daddr %u.%u.%u.%u RDSv%d.%d lguid 0x%llx fguid "
729 "0x%llx", NIPQUAD(dp->dp_saddr), NIPQUAD(dp->dp_daddr),
730 RDS_PROTOCOL_MAJOR(version), RDS_PROTOCOL_MINOR(version),
731 (unsigned long long)ntohll(lguid),
732 (unsigned long long)ntohll(fguid));
733
734 conn = rdsv3_conn_create(dp->dp_daddr, dp->dp_saddr,
735 &rdsv3_ib_transport, KM_NOSLEEP);
736 if (IS_ERR(conn)) {
737 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
738 "rdsv3_conn_create failed (%ld)", PTR_ERR(conn));
739 conn = NULL;
740 goto out;
741 }
742
743 /*
744 * The connection request may occur while the
745 * previous connection exist, e.g. in case of failover.
746 * But as connections may be initiated simultaneously
747 * by both hosts, we have a random backoff mechanism -
748 * see the comment above rdsv3_queue_reconnect()
749 */
750 mutex_enter(&conn->c_cm_lock);
751 if (!rdsv3_conn_transition(conn, RDSV3_CONN_DOWN,
752 RDSV3_CONN_CONNECTING)) {
753 if (rdsv3_conn_state(conn) == RDSV3_CONN_UP) {
754 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
755 "incoming connect when connected: %p",
756 conn);
757 rdsv3_conn_drop(conn);
758 rdsv3_ib_stats_inc(s_ib_listen_closed_stale);
759 mutex_exit(&conn->c_cm_lock);
760 goto out;
761 } else if (rdsv3_conn_state(conn) == RDSV3_CONN_CONNECTING) {
762 /* Wait and see - our connect may still be succeeding */
763 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
764 "peer-to-peer connection request: %p, "
765 "lguid: 0x%llx fguid: 0x%llx",
766 conn, lguid, fguid);
767 rdsv3_ib_stats_inc(s_ib_connect_raced);
768 }
769 mutex_exit(&conn->c_cm_lock);
770 goto out;
771 }
772
773 ic = conn->c_transport_data;
774
775 rdsv3_ib_set_protocol(conn, version);
776 rdsv3_ib_set_flow_control(conn, ntohl(dp->dp_credit));
777
778 /*
779 * If the peer gave us the last packet it saw, process this as if
780 * we had received a regular ACK.
781 */
782 if (dp->dp_ack_seq)
783 rdsv3_send_drop_acked(conn, ntohll(dp->dp_ack_seq), NULL);
784
785 ASSERT(!cm_id->context);
786 ASSERT(!ic->i_cm_id);
787
788 if (ic->i_cm_id != NULL)
789 RDSV3_PANIC();
790
791 ic->i_cm_id = cm_id;
792 cm_id->context = conn;
793
794 /*
795 * We got halfway through setting up the ib_connection, if we
796 * fail now, we have to take the long route out of this mess.
797 */
798 destroy = 0;
799
800 err = rdsv3_ib_setup_qp(conn);
801 if (err) {
802 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
803 "rdsv3_ib_setup_qp failed (%d)", err);
804 mutex_exit(&conn->c_cm_lock);
805 rdsv3_conn_drop(conn);
806 goto out;
807 }
808
809 rdsv3_ib_cm_fill_conn_param(conn, &conn_param, &dp_rep, version,
810 event->param.conn.responder_resources,
811 event->param.conn.initiator_depth);
812
813 /* rdma_accept() calls rdma_reject() internally if it fails */
814 err = rdma_accept(cm_id, &conn_param);
815 mutex_exit(&conn->c_cm_lock);
816 if (err) {
817 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
818 "rdma_accept failed (%d)", err);
819 rdsv3_conn_drop(conn);
820 goto out;
821 }
822
823 RDSV3_DPRINTF2("rdsv3_ib_cm_handle_connect",
824 "Return cm_id: %p event: %p", cm_id, event);
825
826 return (0);
827
828 out:
829 (void) rdma_reject(cm_id, NULL, 0);
830 return (destroy);
831 }
832
833
834 int
rdsv3_ib_cm_initiate_connect(struct rdma_cm_id * cm_id)835 rdsv3_ib_cm_initiate_connect(struct rdma_cm_id *cm_id)
836 {
837 struct rdsv3_connection *conn = cm_id->context;
838 struct rdsv3_ib_connection *ic = conn->c_transport_data;
839 struct rdma_conn_param conn_param;
840 struct rdsv3_ib_connect_private dp;
841 int ret;
842
843 RDSV3_DPRINTF2("rdsv3_ib_cm_initiate_connect", "Enter: cm_id: %p",
844 cm_id);
845
846 /*
847 * If the peer doesn't do protocol negotiation, we must
848 * default to RDSv3.0
849 */
850 rdsv3_ib_set_protocol(conn, RDS_PROTOCOL_3_0);
851 ic->i_flowctl =
852 rdsv3_ib_sysctl_flow_control; /* advertise flow control */
853
854 ret = rdsv3_ib_setup_qp(conn);
855 if (ret) {
856 RDSV3_DPRINTF2("rdsv3_ib_cm_initiate_connect",
857 "rdsv3_ib_setup_qp failed (%d)", ret);
858 rdsv3_conn_drop(conn);
859 goto out;
860 }
861
862 rdsv3_ib_cm_fill_conn_param(conn, &conn_param, &dp,
863 RDS_PROTOCOL_VERSION, UINT_MAX, UINT_MAX);
864
865 ret = rdma_connect(cm_id, &conn_param);
866 if (ret) {
867 RDSV3_DPRINTF2("rdsv3_ib_cm_initiate_connect",
868 "rdma_connect failed (%d)", ret);
869 rdsv3_conn_drop(conn);
870 }
871
872 RDSV3_DPRINTF2("rdsv3_ib_cm_initiate_connect",
873 "Return: cm_id: %p", cm_id);
874
875 out:
876 /*
877 * Beware - returning non-zero tells the rdma_cm to destroy
878 * the cm_id. We should certainly not do it as long as we still
879 * "own" the cm_id.
880 */
881 if (ret) {
882 if (ic->i_cm_id == cm_id)
883 ret = 0;
884 }
885 return (ret);
886 }
887
888 int
rdsv3_ib_conn_connect(struct rdsv3_connection * conn)889 rdsv3_ib_conn_connect(struct rdsv3_connection *conn)
890 {
891 struct rdsv3_ib_connection *ic = conn->c_transport_data;
892 struct sockaddr_in src, dest;
893 ipaddr_t laddr, faddr;
894 int ret;
895
896 RDSV3_DPRINTF2("rdsv3_ib_conn_connect", "Enter: conn: %p", conn);
897
898 /*
899 * XXX I wonder what affect the port space has
900 */
901 /* delegate cm event handler to rdma_transport */
902 ic->i_cm_id = rdma_create_id(rdsv3_rdma_cm_event_handler, conn,
903 RDMA_PS_TCP);
904 if (IS_ERR(ic->i_cm_id)) {
905 ret = PTR_ERR(ic->i_cm_id);
906 ic->i_cm_id = NULL;
907 RDSV3_DPRINTF2("rdsv3_ib_conn_connect",
908 "rdma_create_id() failed: %d", ret);
909 goto out;
910 }
911
912 RDSV3_DPRINTF3("rdsv3_ib_conn_connect",
913 "created cm id %p for conn %p", ic->i_cm_id, conn);
914
915 /* The ipaddr should be in the network order */
916 laddr = conn->c_laddr;
917 faddr = conn->c_faddr;
918 ret = rdsv3_sc_path_lookup(&laddr, &faddr);
919 if (ret == 0) {
920 RDSV3_DPRINTF2(LABEL, "Path not found (0x%x 0x%x)",
921 ntohl(laddr), ntohl(faddr));
922 }
923
924 src.sin_family = AF_INET;
925 src.sin_addr.s_addr = (uint32_t)laddr;
926 src.sin_port = (uint16_t)htons(0);
927
928 dest.sin_family = AF_INET;
929 dest.sin_addr.s_addr = (uint32_t)faddr;
930 dest.sin_port = (uint16_t)htons(RDSV3_PORT);
931
932 ret = rdma_resolve_addr(ic->i_cm_id, (struct sockaddr *)&src,
933 (struct sockaddr *)&dest,
934 RDSV3_RDMA_RESOLVE_TIMEOUT_MS);
935 if (ret) {
936 RDSV3_DPRINTF2("rdsv3_ib_conn_connect",
937 "addr resolve failed for cm id %p: %d", ic->i_cm_id, ret);
938 rdma_destroy_id(ic->i_cm_id);
939 ic->i_cm_id = NULL;
940 }
941
942 RDSV3_DPRINTF2("rdsv3_ib_conn_connect", "Return: conn: %p", conn);
943
944 out:
945 return (ret);
946 }
947
948 /*
949 * This is so careful about only cleaning up resources that were built up
950 * so that it can be called at any point during startup. In fact it
951 * can be called multiple times for a given connection.
952 */
953 void
rdsv3_ib_conn_shutdown(struct rdsv3_connection * conn)954 rdsv3_ib_conn_shutdown(struct rdsv3_connection *conn)
955 {
956 struct rdsv3_ib_connection *ic = conn->c_transport_data;
957 int err = 0;
958
959 RDSV3_DPRINTF2("rdsv3_ib_conn_shutdown",
960 "cm %p pd %p cq %p qp %p", ic->i_cm_id,
961 ic->i_pd, ic->i_cq, ic->i_cm_id ? ic->i_cm_id->qp : NULL);
962
963 if (ic->i_cm_id) {
964 struct ib_device *dev = ic->i_cm_id->device;
965
966 RDSV3_DPRINTF2("rdsv3_ib_conn_shutdown",
967 "disconnecting cm %p", ic->i_cm_id);
968 err = rdma_disconnect(ic->i_cm_id);
969 if (err) {
970 /*
971 * Actually this may happen quite frequently, when
972 * an outgoing connect raced with an incoming connect.
973 */
974 RDSV3_DPRINTF2("rdsv3_ib_conn_shutdown",
975 "failed to disconnect, cm: %p err %d",
976 ic->i_cm_id, err);
977 }
978
979 if (ic->i_cm_id->qp) {
980 (void) ibt_flush_qp(
981 ib_get_ibt_channel_hdl(ic->i_cm_id));
982 /*
983 * Don't wait for the send ring to be empty -- there
984 * may be completed non-signaled entries sitting on
985 * there. We unmap these below.
986 */
987 rdsv3_wait_event(&ic->i_recv_ring.w_empty_wait,
988 rdsv3_ib_ring_empty(&ic->i_recv_ring));
989 /*
990 * Note that Linux original code calls
991 * rdma_destroy_qp() after rdsv3_ib_recv_clear_ring(ic).
992 */
993 rdma_destroy_qp(ic->i_cm_id);
994 }
995
996 if (rdsv3_enable_snd_cq) {
997 if (ic->i_snd_soft_cq) {
998 rdsv3_af_thr_destroy(ic->i_snd_soft_cq);
999 ic->i_snd_soft_cq = NULL;
1000 }
1001 if (ic->i_snd_cq)
1002 (void) ib_destroy_cq(ic->i_snd_cq);
1003 }
1004 if (ic->i_soft_cq) {
1005 rdsv3_af_thr_destroy(ic->i_soft_cq);
1006 ic->i_soft_cq = NULL;
1007 }
1008 if (ic->i_refill_rq) {
1009 rdsv3_af_thr_destroy(ic->i_refill_rq);
1010 ic->i_refill_rq = NULL;
1011 }
1012 if (ic->i_cq)
1013 (void) ib_destroy_cq(ic->i_cq);
1014
1015 if (ic->i_mr)
1016 rdsv3_ib_free_hdrs(dev, ic);
1017
1018 if (ic->i_sends)
1019 rdsv3_ib_send_clear_ring(ic);
1020 if (ic->i_recvs)
1021 rdsv3_ib_recv_clear_ring(ic);
1022
1023 rdma_destroy_id(ic->i_cm_id);
1024
1025 /*
1026 * Move connection back to the nodev list.
1027 */
1028 if (ic->i_on_dev_list)
1029 rdsv3_ib_remove_conn(ic->rds_ibdev, conn);
1030
1031 ic->i_cm_id = NULL;
1032 ic->i_pd = NULL;
1033 ic->i_mr = NULL;
1034 ic->i_cq = NULL;
1035 ic->i_snd_cq = NULL;
1036 ic->i_send_hdrs = NULL;
1037 ic->i_recv_hdrs = NULL;
1038 ic->i_ack = NULL;
1039 }
1040 ASSERT(!ic->i_on_dev_list);
1041
1042 /* Clear pending transmit */
1043 if (ic->i_rm) {
1044 rdsv3_message_put(ic->i_rm);
1045 ic->i_rm = NULL;
1046 }
1047
1048 /* Clear the ACK state */
1049 clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags);
1050 ic->i_ack_next = 0;
1051 ic->i_ack_recv = 0;
1052
1053 /* Clear flow control state */
1054 ic->i_flowctl = 0;
1055 ic->i_credits = 0;
1056
1057 rdsv3_ib_ring_init(&ic->i_send_ring, rdsv3_ib_sysctl_max_send_wr);
1058 rdsv3_ib_ring_init(&ic->i_recv_ring, rdsv3_ib_sysctl_max_recv_wr);
1059
1060 if (ic->i_ibinc) {
1061 rdsv3_inc_put(&ic->i_ibinc->ii_inc);
1062 ic->i_ibinc = NULL;
1063 }
1064
1065 if (ic->i_sends) {
1066 kmem_free(ic->i_sends,
1067 ic->i_send_ring.w_nr * sizeof (struct rdsv3_ib_send_work));
1068 ic->i_sends = NULL;
1069 }
1070 if (ic->i_send_wrs) {
1071 kmem_free(ic->i_send_wrs, ic->i_send_ring.w_nr *
1072 (sizeof (ibt_send_wr_t) +
1073 RDSV3_IB_MAX_SGE * sizeof (ibt_wr_ds_t)));
1074 ic->i_send_wrs = NULL;
1075 }
1076 if (ic->i_recvs) {
1077 kmem_free(ic->i_recvs,
1078 ic->i_recv_ring.w_nr * sizeof (struct rdsv3_ib_recv_work));
1079 ic->i_recvs = NULL;
1080 }
1081 if (ic->i_recv_wrs) {
1082 kmem_free(ic->i_recv_wrs, ic->i_recv_ring.w_nr *
1083 (sizeof (ibt_recv_wr_t)));
1084 ic->i_recv_wrs = NULL;
1085 }
1086
1087 RDSV3_DPRINTF2("rdsv3_ib_conn_shutdown", "Return conn: %p", conn);
1088 }
1089
1090 /* ARGSUSED */
1091 int
rdsv3_ib_conn_alloc(struct rdsv3_connection * conn,int gfp)1092 rdsv3_ib_conn_alloc(struct rdsv3_connection *conn, int gfp)
1093 {
1094 struct rdsv3_ib_connection *ic;
1095
1096 RDSV3_DPRINTF2("rdsv3_ib_conn_alloc", "conn: %p", conn);
1097
1098 /* XXX too lazy? */
1099 ic = kmem_zalloc(sizeof (struct rdsv3_ib_connection), gfp);
1100 if (!ic)
1101 return (-ENOMEM);
1102
1103 list_link_init(&ic->ib_node);
1104
1105 mutex_init(&ic->i_recv_mutex, NULL, MUTEX_DRIVER, NULL);
1106 mutex_init(&ic->i_ack_lock, NULL, MUTEX_DRIVER, NULL);
1107
1108 /*
1109 * rdsv3_ib_conn_shutdown() waits for these to be emptied so they
1110 * must be initialized before it can be called.
1111 */
1112 rdsv3_ib_ring_init(&ic->i_send_ring, rdsv3_ib_sysctl_max_send_wr);
1113 rdsv3_ib_ring_init(&ic->i_recv_ring, rdsv3_ib_sysctl_max_recv_wr);
1114
1115 ic->conn = conn;
1116 conn->c_transport_data = ic;
1117
1118 mutex_enter(&ib_nodev_conns_lock);
1119 list_insert_tail(&ib_nodev_conns, ic);
1120 mutex_exit(&ib_nodev_conns_lock);
1121
1122 RDSV3_DPRINTF2("rdsv3_ib_conn_alloc", "conn %p conn ic %p",
1123 conn, conn->c_transport_data);
1124 return (0);
1125 }
1126
1127 /*
1128 * Free a connection. Connection must be shut down and not set for reconnect.
1129 */
1130 void
rdsv3_ib_conn_free(void * arg)1131 rdsv3_ib_conn_free(void *arg)
1132 {
1133 struct rdsv3_ib_connection *ic = arg;
1134 kmutex_t *lock_ptr;
1135
1136 RDSV3_DPRINTF2("rdsv3_ib_conn_free", "ic %p\n", ic);
1137
1138 #ifndef __lock_lint
1139 /*
1140 * Conn is either on a dev's list or on the nodev list.
1141 * A race with shutdown() or connect() would cause problems
1142 * (since rds_ibdev would change) but that should never happen.
1143 */
1144 lock_ptr = ic->i_on_dev_list ?
1145 &ic->rds_ibdev->spinlock : &ib_nodev_conns_lock;
1146
1147 mutex_enter(lock_ptr);
1148 list_remove_node(&ic->ib_node);
1149 mutex_exit(lock_ptr);
1150 #endif
1151 kmem_free(ic, sizeof (*ic));
1152 }
1153
1154 /*
1155 * An error occurred on the connection
1156 */
1157 void
__rdsv3_ib_conn_error(struct rdsv3_connection * conn)1158 __rdsv3_ib_conn_error(struct rdsv3_connection *conn)
1159 {
1160 rdsv3_conn_drop(conn);
1161 }
1162