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lib: Remove unused functions
[Samba.git] / ctdb / ib / ibwrapper.c
blob51d39daeba35224200957014a507d6b5d44b84cf
1 /*
2 * Unix SMB/CIFS implementation.
3 * Wrap Infiniband calls.
4 *
5 * Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
6 *
7 * Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include <stdlib.h>
24 #include <string.h>
25 #include <stdio.h>
26 #include <errno.h>
27 #include <sys/types.h>
28 #include <netinet/in.h>
29 #include <sys/socket.h>
30 #include <netdb.h>
31 #include <arpa/inet.h>
32 #include <malloc.h>
33 #include <assert.h>
34 #include <unistd.h>
35
36 #include "includes.h"
37 #include "ibwrapper.h"
38
39 #include <infiniband/kern-abi.h>
40 #include <rdma/rdma_cma_abi.h>
41 #include <rdma/rdma_cma.h>
42
43 #include "ibwrapper_internal.h"
44 #include "lib/util/dlinklist.h"
45
46 #define IBW_LASTERR_BUFSIZE 512
47 static char ibw_lasterr[IBW_LASTERR_BUFSIZE];
48
49 #define IBW_MAX_SEND_WR 256
50 #define IBW_MAX_RECV_WR 1024
51 #define IBW_RECV_BUFSIZE 256
52 #define IBW_RECV_THRESHOLD (1 * 1024 * 1024)
53
54 static void ibw_event_handler_verbs(struct event_context *ev,
55 struct fd_event *fde, uint16_t flags, void *private_data);
56 static int ibw_fill_cq(struct ibw_conn *conn);
57 static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc);
58 static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc);
59 static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len);
60
61 static void *ibw_alloc_mr(struct ibw_ctx_priv *pctx, struct ibw_conn_priv *pconn,
62 uint32_t n, struct ibv_mr **ppmr)
63 {
64 void *buf;
65
66 DEBUG(DEBUG_DEBUG, ("ibw_alloc_mr(cmid=%p, n=%u)\n", pconn->cm_id, n));
67 buf = memalign(pctx->pagesize, n);
68 if (!buf) {
69 sprintf(ibw_lasterr, "couldn't allocate memory\n");
70 return NULL;
71 }
72
73 *ppmr = ibv_reg_mr(pconn->pd, buf, n, IBV_ACCESS_LOCAL_WRITE);
74 if (!*ppmr) {
75 sprintf(ibw_lasterr, "couldn't allocate mr\n");
76 free(buf);
77 return NULL;
78 }
79
80 return buf;
81 }
82
83 static void ibw_free_mr(char **ppbuf, struct ibv_mr **ppmr)
84 {
85 DEBUG(DEBUG_DEBUG, ("ibw_free_mr(%p %p)\n", *ppbuf, *ppmr));
86 if (*ppmr!=NULL) {
87 ibv_dereg_mr(*ppmr);
88 *ppmr = NULL;
89 }
90 if (*ppbuf) {
91 free(*ppbuf);
92 *ppbuf = NULL;
93 }
94 }
95
96 static int ibw_init_memory(struct ibw_conn *conn)
97 {
98 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
99 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
100 struct ibw_opts *opts = &pctx->opts;
101 int i;
102 struct ibw_wr *p;
103
104 DEBUG(DEBUG_DEBUG, ("ibw_init_memory(cmid: %p)\n", pconn->cm_id));
105 pconn->buf_send = ibw_alloc_mr(pctx, pconn,
106 opts->max_send_wr * opts->recv_bufsize, &pconn->mr_send);
107 if (!pconn->buf_send) {
108 sprintf(ibw_lasterr, "couldn't allocate work send buf\n");
109 return -1;
110 }
111
112 pconn->buf_recv = ibw_alloc_mr(pctx, pconn,
113 opts->max_recv_wr * opts->recv_bufsize, &pconn->mr_recv);
114 if (!pconn->buf_recv) {
115 sprintf(ibw_lasterr, "couldn't allocate work recv buf\n");
116 return -1;
117 }
118
119 pconn->wr_index = talloc_size(pconn, opts->max_send_wr * sizeof(struct ibw_wr *));
120 assert(pconn->wr_index!=NULL);
121
122 for(i=0; i<opts->max_send_wr; i++) {
123 p = pconn->wr_index[i] = talloc_zero(pconn, struct ibw_wr);
124 p->buf = pconn->buf_send + (i * opts->recv_bufsize);
125 p->wr_id = i;
126
127 DLIST_ADD(pconn->wr_list_avail, p);
128 }
129
130 return 0;
131 }
132
133 static int ibw_ctx_priv_destruct(struct ibw_ctx_priv *pctx)
134 {
135 DEBUG(DEBUG_DEBUG, ("ibw_ctx_priv_destruct(%p)\n", pctx));
136
137 /*
138 * tevent_fd must be removed before the fd is closed
139 */
140 TALLOC_FREE(pctx->cm_channel_event);
141
142 /* destroy cm */
143 if (pctx->cm_channel) {
144 rdma_destroy_event_channel(pctx->cm_channel);
145 pctx->cm_channel = NULL;
146 }
147 if (pctx->cm_id) {
148 rdma_destroy_id(pctx->cm_id);
149 pctx->cm_id = NULL;
150 }
151
152 return 0;
153 }
154
155 static int ibw_ctx_destruct(struct ibw_ctx *ctx)
156 {
157 DEBUG(DEBUG_DEBUG, ("ibw_ctx_destruct(%p)\n", ctx));
158 return 0;
159 }
160
161 static int ibw_conn_priv_destruct(struct ibw_conn_priv *pconn)
162 {
163 DEBUG(DEBUG_DEBUG, ("ibw_conn_priv_destruct(%p, cmid: %p)\n",
164 pconn, pconn->cm_id));
165
166 /* pconn->wr_index is freed by talloc */
167 /* pconn->wr_index[i] are freed by talloc */
168
169 /*
170 * tevent_fd must be removed before the fd is closed
171 */
172 TALLOC_FREE(pconn->verbs_channel_event);
173
174 /* destroy verbs */
175 if (pconn->cm_id!=NULL && pconn->cm_id->qp!=NULL) {
176 rdma_destroy_qp(pconn->cm_id);
177 pconn->cm_id->qp = NULL;
178 }
179
180 if (pconn->cq!=NULL) {
181 ibv_destroy_cq(pconn->cq);
182 pconn->cq = NULL;
183 }
184
185 if (pconn->verbs_channel!=NULL) {
186 ibv_destroy_comp_channel(pconn->verbs_channel);
187 pconn->verbs_channel = NULL;
188 }
189
190 /* free memory regions */
191 ibw_free_mr(&pconn->buf_send, &pconn->mr_send);
192 ibw_free_mr(&pconn->buf_recv, &pconn->mr_recv);
193
194 if (pconn->pd) {
195 ibv_dealloc_pd(pconn->pd);
196 pconn->pd = NULL;
197 DEBUG(DEBUG_DEBUG, ("pconn=%p pd deallocated\n", pconn));
198 }
199
200 if (pconn->cm_id) {
201 rdma_destroy_id(pconn->cm_id);
202 pconn->cm_id = NULL;
203 DEBUG(DEBUG_DEBUG, ("pconn=%p cm_id destroyed\n", pconn));
204 }
205
206 return 0;
207 }
208
209 static int ibw_wr_destruct(struct ibw_wr *wr)
210 {
211 if (wr->buf_large!=NULL)
212 ibw_free_mr(&wr->buf_large, &wr->mr_large);
213 return 0;
214 }
215
216 static int ibw_conn_destruct(struct ibw_conn *conn)
217 {
218 DEBUG(DEBUG_DEBUG, ("ibw_conn_destruct(%p)\n", conn));
219
220 /* important here: ctx is a talloc _parent_ */
221 DLIST_REMOVE(conn->ctx->conn_list, conn);
222 return 0;
223 }
224
225 struct ibw_conn *ibw_conn_new(struct ibw_ctx *ctx, TALLOC_CTX *mem_ctx)
226 {
227 struct ibw_conn *conn;
228 struct ibw_conn_priv *pconn;
229
230 assert(ctx!=NULL);
231
232 conn = talloc_zero(mem_ctx, struct ibw_conn);
233 assert(conn!=NULL);
234 talloc_set_destructor(conn, ibw_conn_destruct);
235
236 pconn = talloc_zero(conn, struct ibw_conn_priv);
237 assert(pconn!=NULL);
238 talloc_set_destructor(pconn, ibw_conn_priv_destruct);
239
240 conn->ctx = ctx;
241 conn->internal = (void *)pconn;
242
243 DLIST_ADD(ctx->conn_list, conn);
244
245 return conn;
246 }
247
248 static int ibw_setup_cq_qp(struct ibw_conn *conn)
249 {
250 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
251 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
252 struct ibv_qp_init_attr init_attr;
253 struct ibv_qp_attr attr;
254 int rc;
255
256 DEBUG(DEBUG_DEBUG, ("ibw_setup_cq_qp(cmid: %p)\n", pconn->cm_id));
257
258 /* init verbs */
259 pconn->verbs_channel = ibv_create_comp_channel(pconn->cm_id->verbs);
260 if (!pconn->verbs_channel) {
261 sprintf(ibw_lasterr, "ibv_create_comp_channel failed %d\n", errno);
262 return -1;
263 }
264 DEBUG(DEBUG_DEBUG, ("created channel %p\n", pconn->verbs_channel));
265
266 pconn->verbs_channel_event = event_add_fd(pctx->ectx, NULL, /* not pconn or conn */
267 pconn->verbs_channel->fd, EVENT_FD_READ, ibw_event_handler_verbs, conn);
268
269 pconn->pd = ibv_alloc_pd(pconn->cm_id->verbs);
270 if (!pconn->pd) {
271 sprintf(ibw_lasterr, "ibv_alloc_pd failed %d\n", errno);
272 return -1;
273 }
274 DEBUG(DEBUG_DEBUG, ("created pd %p\n", pconn->pd));
275
276 /* init mr */
277 if (ibw_init_memory(conn))
278 return -1;
279
280 /* init cq */
281 pconn->cq = ibv_create_cq(pconn->cm_id->verbs,
282 pctx->opts.max_recv_wr + pctx->opts.max_send_wr,
283 conn, pconn->verbs_channel, 0);
284 if (pconn->cq==NULL) {
285 sprintf(ibw_lasterr, "ibv_create_cq failed\n");
286 return -1;
287 }
288
289 rc = ibv_req_notify_cq(pconn->cq, 0);
290 if (rc) {
291 sprintf(ibw_lasterr, "ibv_req_notify_cq failed with %d\n", rc);
292 return rc;
293 }
294
295 /* init qp */
296 memset(&init_attr, 0, sizeof(init_attr));
297 init_attr.cap.max_send_wr = pctx->opts.max_send_wr;
298 init_attr.cap.max_recv_wr = pctx->opts.max_recv_wr;
299 init_attr.cap.max_recv_sge = 1;
300 init_attr.cap.max_send_sge = 1;
301 init_attr.qp_type = IBV_QPT_RC;
302 init_attr.send_cq = pconn->cq;
303 init_attr.recv_cq = pconn->cq;
304
305 rc = rdma_create_qp(pconn->cm_id, pconn->pd, &init_attr);
306 if (rc) {
307 sprintf(ibw_lasterr, "rdma_create_qp failed with %d\n", rc);
308 return rc;
309 }
310 /* elase result is in pconn->cm_id->qp */
311
312 rc = ibv_query_qp(pconn->cm_id->qp, &attr, IBV_QP_PATH_MTU, &init_attr);
313 if (rc) {
314 sprintf(ibw_lasterr, "ibv_query_qp failed with %d\n", rc);
315 return rc;
316 }
317
318 return ibw_fill_cq(conn);
319 }
320
321 static int ibw_refill_cq_recv(struct ibw_conn *conn)
322 {
323 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
324 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
325 int rc;
326 struct ibv_sge list = {
327 .addr = (uintptr_t) NULL, /* filled below */
328 .length = pctx->opts.recv_bufsize,
329 .lkey = pconn->mr_recv->lkey /* always the same */
330 };
331 struct ibv_recv_wr wr = {
332 .wr_id = 0, /* filled below */
333 .sg_list = &list,
334 .num_sge = 1,
335 };
336 struct ibv_recv_wr *bad_wr;
337
338 DEBUG(DEBUG_DEBUG, ("ibw_refill_cq_recv(cmid: %p)\n", pconn->cm_id));
339
340 list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index;
341 wr.wr_id = pconn->recv_index;
342 pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr;
343
344 rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr);
345 if (rc) {
346 sprintf(ibw_lasterr, "refill/ibv_post_recv failed with %d\n", rc);
347 DEBUG(DEBUG_ERR, (ibw_lasterr));
348 return -2;
349 }
350
351 return 0;
352 }
353
354 static int ibw_fill_cq(struct ibw_conn *conn)
355 {
356 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
357 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
358 int i, rc;
359 struct ibv_sge list = {
360 .addr = (uintptr_t) NULL, /* filled below */
361 .length = pctx->opts.recv_bufsize,
362 .lkey = pconn->mr_recv->lkey /* always the same */
363 };
364 struct ibv_recv_wr wr = {
365 .wr_id = 0, /* filled below */
366 .sg_list = &list,
367 .num_sge = 1,
368 };
369 struct ibv_recv_wr *bad_wr;
370
371 DEBUG(DEBUG_DEBUG, ("ibw_fill_cq(cmid: %p)\n", pconn->cm_id));
372
373 for(i = pctx->opts.max_recv_wr; i!=0; i--) {
374 list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index;
375 wr.wr_id = pconn->recv_index;
376 pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr;
377
378 rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr);
379 if (rc) {
380 sprintf(ibw_lasterr, "fill/ibv_post_recv failed with %d\n", rc);
381 DEBUG(DEBUG_ERR, (ibw_lasterr));
382 return -2;
383 }
384 }
385
386 return 0;
387 }
388
389 static int ibw_manage_connect(struct ibw_conn *conn)
390 {
391 struct rdma_conn_param conn_param;
392 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
393 int rc;
394
395 DEBUG(DEBUG_DEBUG, ("ibw_manage_connect(cmid: %p)\n", pconn->cm_id));
396
397 if (ibw_setup_cq_qp(conn))
398 return -1;
399
400 /* cm connect */
401 memset(&conn_param, 0, sizeof conn_param);
402 conn_param.responder_resources = 1;
403 conn_param.initiator_depth = 1;
404 conn_param.retry_count = 10;
405
406 rc = rdma_connect(pconn->cm_id, &conn_param);
407 if (rc)
408 sprintf(ibw_lasterr, "rdma_connect error %d\n", rc);
409
410 return rc;
411 }
412
413 static void ibw_event_handler_cm(struct event_context *ev,
414 struct fd_event *fde, uint16_t flags, void *private_data)
415 {
416 int rc;
417 struct ibw_ctx *ctx = talloc_get_type(private_data, struct ibw_ctx);
418 struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv);
419 struct ibw_conn *conn = NULL;
420 struct ibw_conn_priv *pconn = NULL;
421 struct rdma_cm_id *cma_id = NULL;
422 struct rdma_cm_event *event = NULL;
423
424 assert(ctx!=NULL);
425
426 rc = rdma_get_cm_event(pctx->cm_channel, &event);
427 if (rc) {
428 ctx->state = IBWS_ERROR;
429 event = NULL;
430 sprintf(ibw_lasterr, "rdma_get_cm_event error %d\n", rc);
431 goto error;
432 }
433 cma_id = event->id;
434
435 DEBUG(DEBUG_DEBUG, ("cma_event type %d cma_id %p (%s)\n", event->event, cma_id,
436 (cma_id == pctx->cm_id) ? "parent" : "child"));
437
438 switch (event->event) {
439 case RDMA_CM_EVENT_ADDR_RESOLVED:
440 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_ADDR_RESOLVED\n"));
441 /* continuing from ibw_connect ... */
442 rc = rdma_resolve_route(cma_id, 2000);
443 if (rc) {
444 sprintf(ibw_lasterr, "rdma_resolve_route error %d\n", rc);
445 goto error;
446 }
447 /* continued at RDMA_CM_EVENT_ROUTE_RESOLVED */
448 break;
449
450 case RDMA_CM_EVENT_ROUTE_RESOLVED:
451 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_ROUTE_RESOLVED\n"));
452 /* after RDMA_CM_EVENT_ADDR_RESOLVED: */
453 assert(cma_id->context!=NULL);
454 conn = talloc_get_type(cma_id->context, struct ibw_conn);
455
456 rc = ibw_manage_connect(conn);
457 if (rc)
458 goto error;
459
460 break;
461
462 case RDMA_CM_EVENT_CONNECT_REQUEST:
463 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_CONNECT_REQUEST\n"));
464 ctx->state = IBWS_CONNECT_REQUEST;
465 conn = ibw_conn_new(ctx, ctx);
466 pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
467 pconn->cm_id = cma_id; /* !!! event will be freed but id not */
468 cma_id->context = (void *)conn;
469 DEBUG(DEBUG_DEBUG, ("pconn->cm_id %p\n", pconn->cm_id));
470
471 if (ibw_setup_cq_qp(conn))
472 goto error;
473
474 conn->state = IBWC_INIT;
475 pctx->connstate_func(ctx, conn);
476
477 /* continued at ibw_accept when invoked by the func above */
478 if (!pconn->is_accepted) {
479 rc = rdma_reject(cma_id, NULL, 0);
480 if (rc)
481 DEBUG(DEBUG_ERR, ("rdma_reject failed with rc=%d\n", rc));
482 talloc_free(conn);
483 DEBUG(DEBUG_DEBUG, ("pconn->cm_id %p wasn't accepted\n", pconn->cm_id));
484 }
485
486 /* TODO: clarify whether if it's needed by upper layer: */
487 ctx->state = IBWS_READY;
488 pctx->connstate_func(ctx, NULL);
489
490 /* NOTE: more requests can arrive until RDMA_CM_EVENT_ESTABLISHED ! */
491 break;
492
493 case RDMA_CM_EVENT_ESTABLISHED:
494 /* expected after ibw_accept and ibw_connect[not directly] */
495 DEBUG(DEBUG_INFO, ("ESTABLISHED (conn: %p)\n", cma_id->context));
496 conn = talloc_get_type(cma_id->context, struct ibw_conn);
497 assert(conn!=NULL); /* important assumption */
498
499 DEBUG(DEBUG_DEBUG, ("ibw_setup_cq_qp succeeded (cmid=%p)\n", cma_id));
500
501 /* client conn is up */
502 conn->state = IBWC_CONNECTED;
503
504 /* both ctx and conn have changed */
505 pctx->connstate_func(ctx, conn);
506 break;
507
508 case RDMA_CM_EVENT_ADDR_ERROR:
509 sprintf(ibw_lasterr, "RDMA_CM_EVENT_ADDR_ERROR, error %d\n", event->status);
510 case RDMA_CM_EVENT_ROUTE_ERROR:
511 sprintf(ibw_lasterr, "RDMA_CM_EVENT_ROUTE_ERROR, error %d\n", event->status);
512 case RDMA_CM_EVENT_CONNECT_ERROR:
513 sprintf(ibw_lasterr, "RDMA_CM_EVENT_CONNECT_ERROR, error %d\n", event->status);
514 case RDMA_CM_EVENT_UNREACHABLE:
515 sprintf(ibw_lasterr, "RDMA_CM_EVENT_UNREACHABLE, error %d\n", event->status);
516 goto error;
517 case RDMA_CM_EVENT_REJECTED:
518 sprintf(ibw_lasterr, "RDMA_CM_EVENT_REJECTED, error %d\n", event->status);
519 DEBUG(DEBUG_INFO, ("cm event handler: %s", ibw_lasterr));
520 conn = talloc_get_type(cma_id->context, struct ibw_conn);
521 if (conn) {
522 /* must be done BEFORE connstate */
523 if ((rc=rdma_ack_cm_event(event)))
524 DEBUG(DEBUG_ERR, ("reject/rdma_ack_cm_event failed with %d\n", rc));
525 event = NULL; /* not to touch cma_id or conn */
526 conn->state = IBWC_ERROR;
527 /* it should free the conn */
528 pctx->connstate_func(NULL, conn);
529 }
530 break; /* this is not strictly an error */
531
532 case RDMA_CM_EVENT_DISCONNECTED:
533 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_DISCONNECTED\n"));
534 if ((rc=rdma_ack_cm_event(event)))
535 DEBUG(DEBUG_ERR, ("disc/rdma_ack_cm_event failed with %d\n", rc));
536 event = NULL; /* don't ack more */
537
538 if (cma_id!=pctx->cm_id) {
539 DEBUG(DEBUG_ERR, ("client DISCONNECT event cm_id=%p\n", cma_id));
540 conn = talloc_get_type(cma_id->context, struct ibw_conn);
541 conn->state = IBWC_DISCONNECTED;
542 pctx->connstate_func(NULL, conn);
543 }
544 break;
545
546 case RDMA_CM_EVENT_DEVICE_REMOVAL:
547 sprintf(ibw_lasterr, "cma detected device removal!\n");
548 goto error;
549
550 default:
551 sprintf(ibw_lasterr, "unknown event %d\n", event->event);
552 goto error;
553 }
554
555 if (event!=NULL && (rc=rdma_ack_cm_event(event))) {
556 sprintf(ibw_lasterr, "rdma_ack_cm_event failed with %d\n", rc);
557 goto error;
558 }
559
560 return;
561 error:
562 DEBUG(DEBUG_ERR, ("cm event handler: %s", ibw_lasterr));
563
564 if (event!=NULL) {
565 if (cma_id!=NULL && cma_id!=pctx->cm_id) {
566 conn = talloc_get_type(cma_id->context, struct ibw_conn);
567 if (conn) {
568 conn->state = IBWC_ERROR;
569 pctx->connstate_func(NULL, conn);
570 }
571 } else {
572 ctx->state = IBWS_ERROR;
573 pctx->connstate_func(ctx, NULL);
574 }
575
576 if ((rc=rdma_ack_cm_event(event))!=0) {
577 DEBUG(DEBUG_ERR, ("rdma_ack_cm_event failed with %d\n", rc));
578 }
579 }
580
581 return;
582 }
583
584 static void ibw_event_handler_verbs(struct event_context *ev,
585 struct fd_event *fde, uint16_t flags, void *private_data)
586 {
587 struct ibw_conn *conn = talloc_get_type(private_data, struct ibw_conn);
588 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
589 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
590
591 struct ibv_wc wc;
592 int rc;
593 struct ibv_cq *ev_cq;
594 void *ev_ctx;
595
596 DEBUG(DEBUG_DEBUG, ("ibw_event_handler_verbs(%u)\n", (uint32_t)flags));
597
598 /* TODO: check whether if it's good to have more channels here... */
599 rc = ibv_get_cq_event(pconn->verbs_channel, &ev_cq, &ev_ctx);
600 if (rc) {
601 sprintf(ibw_lasterr, "Failed to get cq_event with %d\n", rc);
602 goto error;
603 }
604 if (ev_cq != pconn->cq) {
605 sprintf(ibw_lasterr, "ev_cq(%p) != pconn->cq(%p)\n", ev_cq, pconn->cq);
606 goto error;
607 }
608 rc = ibv_req_notify_cq(pconn->cq, 0);
609 if (rc) {
610 sprintf(ibw_lasterr, "Couldn't request CQ notification (%d)\n", rc);
611 goto error;
612 }
613
614 while((rc=ibv_poll_cq(pconn->cq, 1, &wc))==1) {
615 if (wc.status) {
616 sprintf(ibw_lasterr, "cq completion failed status=%d, opcode=%d, rc=%d\n",
617 wc.status, wc.opcode, rc);
618 goto error;
619 }
620
621 switch(wc.opcode) {
622 case IBV_WC_SEND:
623 DEBUG(DEBUG_DEBUG, ("send completion\n"));
624 if (ibw_wc_send(conn, &wc))
625 goto error;
626 break;
627
628 case IBV_WC_RDMA_WRITE:
629 DEBUG(DEBUG_DEBUG, ("rdma write completion\n"));
630 break;
631
632 case IBV_WC_RDMA_READ:
633 DEBUG(DEBUG_DEBUG, ("rdma read completion\n"));
634 break;
635
636 case IBV_WC_RECV:
637 DEBUG(DEBUG_DEBUG, ("recv completion\n"));
638 if (ibw_wc_recv(conn, &wc))
639 goto error;
640 break;
641
642 default:
643 sprintf(ibw_lasterr, "unknown completion %d\n", wc.opcode);
644 goto error;
645 }
646 }
647 if (rc!=0) {
648 sprintf(ibw_lasterr, "ibv_poll_cq error %d\n", rc);
649 goto error;
650 }
651
652 ibv_ack_cq_events(pconn->cq, 1);
653
654 return;
655 error:
656 ibv_ack_cq_events(pconn->cq, 1);
657
658 DEBUG(DEBUG_ERR, (ibw_lasterr));
659
660 if (conn->state!=IBWC_ERROR) {
661 conn->state = IBWC_ERROR;
662 pctx->connstate_func(NULL, conn);
663 }
664 }
665
666 static int ibw_process_queue(struct ibw_conn *conn)
667 {
668 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
669 struct ibw_ctx_priv *pctx;
670 struct ibw_wr *p;
671 int rc;
672 uint32_t msg_size;
673
674 if (pconn->queue==NULL)
675 return 0; /* NOP */
676
677 p = pconn->queue;
678
679 /* we must have at least 1 fragment to send */
680 assert(p->queued_ref_cnt>0);
681 p->queued_ref_cnt--;
682
683 pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
684 msg_size = (p->queued_ref_cnt) ? pctx->opts.recv_bufsize : p->queued_rlen;
685
686 assert(p->queued_msg!=NULL);
687 assert(msg_size!=0);
688
689 DEBUG(DEBUG_DEBUG, ("ibw_process_queue refcnt=%d msgsize=%u\n",
690 p->queued_ref_cnt, msg_size));
691
692 rc = ibw_send_packet(conn, p->queued_msg, p, msg_size);
693
694 /* was this the last fragment? */
695 if (p->queued_ref_cnt) {
696 p->queued_msg += pctx->opts.recv_bufsize;
697 } else {
698 DLIST_REMOVE2(pconn->queue, p, qprev, qnext);
699 p->queued_msg = NULL;
700 }
701
702 return rc;
703 }
704
705 static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc)
706 {
707 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
708 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
709 struct ibw_wr *p;
710 int send_index;
711
712 DEBUG(DEBUG_DEBUG, ("ibw_wc_send(cmid: %p, wr_id: %u, bl: %u)\n",
713 pconn->cm_id, (uint32_t)wc->wr_id, (uint32_t)wc->byte_len));
714
715 assert(pconn->cm_id->qp->qp_num==wc->qp_num);
716 assert(wc->wr_id >= pctx->opts.max_recv_wr);
717 send_index = wc->wr_id - pctx->opts.max_recv_wr;
718 pconn->wr_sent--;
719
720 if (send_index < pctx->opts.max_send_wr) {
721 DEBUG(DEBUG_DEBUG, ("ibw_wc_send#1 %u\n", (int)wc->wr_id));
722 p = pconn->wr_index[send_index];
723 if (p->buf_large!=NULL) {
724 if (p->ref_cnt) {
725 /* awaiting more of it... */
726 p->ref_cnt--;
727 } else {
728 ibw_free_mr(&p->buf_large, &p->mr_large);
729 DLIST_REMOVE(pconn->wr_list_used, p);
730 DLIST_ADD(pconn->wr_list_avail, p);
731 }
732 } else { /* nasty - but necessary */
733 DLIST_REMOVE(pconn->wr_list_used, p);
734 DLIST_ADD(pconn->wr_list_avail, p);
735 }
736 } else { /* "extra" request - not optimized */
737 DEBUG(DEBUG_DEBUG, ("ibw_wc_send#2 %u\n", (int)wc->wr_id));
738 for(p=pconn->extra_sent; p!=NULL; p=p->next)
739 if ((p->wr_id + pctx->opts.max_recv_wr)==(int)wc->wr_id)
740 break;
741 if (p==NULL) {
742 sprintf(ibw_lasterr, "failed to find wr_id %d\n", (int)wc->wr_id);
743 return -1;
744 }
745 if (p->ref_cnt) {
746 p->ref_cnt--;
747 } else {
748 ibw_free_mr(&p->buf_large, &p->mr_large);
749 DLIST_REMOVE(pconn->extra_sent, p);
750 DLIST_ADD(pconn->extra_avail, p);
751 }
752 }
753
754 return ibw_process_queue(conn);
755 }
756
757 static int ibw_append_to_part(struct ibw_conn_priv *pconn,
758 struct ibw_part *part, char **pp, uint32_t add_len, int info)
759 {
760 DEBUG(DEBUG_DEBUG, ("ibw_append_to_part: cmid=%p, (bs=%u, len=%u, tr=%u), al=%u, i=%u\n",
761 pconn->cm_id, part->bufsize, part->len, part->to_read, add_len, info));
762
763 /* allocate more if necessary - it's an "evergrowing" buffer... */
764 if (part->len + add_len > part->bufsize) {
765 if (part->buf==NULL) {
766 assert(part->len==0);
767 part->buf = talloc_size(pconn, add_len);
768 if (part->buf==NULL) {
769 sprintf(ibw_lasterr, "recv talloc_size error (%u) #%d\n",
770 add_len, info);
771 return -1;
772 }
773 part->bufsize = add_len;
774 } else {
775 part->buf = talloc_realloc_size(pconn,
776 part->buf, part->len + add_len);
777 if (part->buf==NULL) {
778 sprintf(ibw_lasterr, "recv realloc error (%u + %u) #%d\n",
779 part->len, add_len, info);
780 return -1;
781 }
782 }
783 part->bufsize = part->len + add_len;
784 }
785
786 /* consume pp */
787 memcpy(part->buf + part->len, *pp, add_len);
788 *pp += add_len;
789 part->len += add_len;
790 part->to_read -= add_len;
791
792 return 0;
793 }
794
795 static int ibw_wc_mem_threshold(struct ibw_conn_priv *pconn,
796 struct ibw_part *part, uint32_t threshold)
797 {
798 DEBUG(DEBUG_DEBUG, ("ibw_wc_mem_threshold: cmid=%p, (bs=%u, len=%u, tr=%u), thr=%u\n",
799 pconn->cm_id, part->bufsize, part->len, part->to_read, threshold));
800
801 if (part->bufsize > threshold) {
802 DEBUG(DEBUG_DEBUG, ("ibw_wc_mem_threshold: cmid=%p, %u > %u\n",
803 pconn->cm_id, part->bufsize, threshold));
804 talloc_free(part->buf);
805 part->buf = talloc_size(pconn, threshold);
806 if (part->buf==NULL) {
807 sprintf(ibw_lasterr, "talloc_size failed\n");
808 return -1;
809 }
810 part->bufsize = threshold;
811 }
812 return 0;
813 }
814
815 static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc)
816 {
817 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
818 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
819 struct ibw_part *part = &pconn->part;
820 char *p;
821 uint32_t remain = wc->byte_len;
822
823 DEBUG(DEBUG_DEBUG, ("ibw_wc_recv: cmid=%p, wr_id: %u, bl: %u\n",
824 pconn->cm_id, (uint32_t)wc->wr_id, remain));
825
826 assert(pconn->cm_id->qp->qp_num==wc->qp_num);
827 assert((int)wc->wr_id < pctx->opts.max_recv_wr);
828 assert(wc->byte_len <= pctx->opts.recv_bufsize);
829
830 p = pconn->buf_recv + ((int)wc->wr_id * pctx->opts.recv_bufsize);
831
832 while(remain) {
833 /* here always true: (part->len!=0 && part->to_read!=0) ||
834 (part->len==0 && part->to_read==0) */
835 if (part->len) { /* is there a partial msg to be continued? */
836 int read_len = (part->to_read<=remain) ? part->to_read : remain;
837 if (ibw_append_to_part(pconn, part, &p, read_len, 421))
838 goto error;
839 remain -= read_len;
840
841 if (part->len<=sizeof(uint32_t) && part->to_read==0) {
842 assert(part->len==sizeof(uint32_t));
843 /* set it again now... */
844 part->to_read = *((uint32_t *)(part->buf)); /* TODO: ntohl */
845 if (part->to_read<sizeof(uint32_t)) {
846 sprintf(ibw_lasterr, "got msglen=%u #2\n", part->to_read);
847 goto error;
848 }
849 part->to_read -= sizeof(uint32_t); /* it's already read */
850 }
851
852 if (part->to_read==0) {
853 if (pctx->receive_func(conn, part->buf, part->len) != 0) {
854 goto error;
855 }
856 part->len = 0; /* tells not having partial data (any more) */
857 if (ibw_wc_mem_threshold(pconn, part, pctx->opts.recv_threshold))
858 goto error;
859 }
860 } else {
861 if (remain>=sizeof(uint32_t)) {
862 uint32_t msglen = *(uint32_t *)p; /* TODO: ntohl */
863 if (msglen<sizeof(uint32_t)) {
864 sprintf(ibw_lasterr, "got msglen=%u\n", msglen);
865 goto error;
866 }
867
868 /* mostly awaited case: */
869 if (msglen<=remain) {
870 if (pctx->receive_func(conn, p, msglen) != 0) {
871 goto error;
872 }
873 p += msglen;
874 remain -= msglen;
875 } else {
876 part->to_read = msglen;
877 /* part->len is already 0 */
878 if (ibw_append_to_part(pconn, part, &p, remain, 422))
879 goto error;
880 remain = 0; /* to be continued ... */
881 /* part->to_read > 0 here */
882 }
883 } else { /* edge case: */
884 part->to_read = sizeof(uint32_t);
885 /* part->len is already 0 */
886 if (ibw_append_to_part(pconn, part, &p, remain, 423))
887 goto error;
888 remain = 0;
889 /* part->to_read > 0 here */
890 }
891 }
892 } /* <remain> is always decreased at least by 1 */
893
894 if (ibw_refill_cq_recv(conn))
895 goto error;
896
897 return 0;
898
899 error:
900 DEBUG(DEBUG_ERR, ("ibw_wc_recv error: %s", ibw_lasterr));
901 return -1;
902 }
903
904 static int ibw_process_init_attrs(struct ibw_initattr *attr, int nattr, struct ibw_opts *opts)
905 {
906 int i;
907 const char *name, *value;
908
909 DEBUG(DEBUG_DEBUG, ("ibw_process_init_attrs: nattr: %d\n", nattr));
910
911 opts->max_send_wr = IBW_MAX_SEND_WR;
912 opts->max_recv_wr = IBW_MAX_RECV_WR;
913 opts->recv_bufsize = IBW_RECV_BUFSIZE;
914 opts->recv_threshold = IBW_RECV_THRESHOLD;
915
916 for(i=0; i<nattr; i++) {
917 name = attr[i].name;
918 value = attr[i].value;
919
920 assert(name!=NULL && value!=NULL);
921 if (strcmp(name, "max_send_wr")==0)
922 opts->max_send_wr = atoi(value);
923 else if (strcmp(name, "max_recv_wr")==0)
924 opts->max_recv_wr = atoi(value);
925 else if (strcmp(name, "recv_bufsize")==0)
926 opts->recv_bufsize = atoi(value);
927 else if (strcmp(name, "recv_threshold")==0)
928 opts->recv_threshold = atoi(value);
929 else {
930 sprintf(ibw_lasterr, "ibw_init: unknown name %s\n", name);
931 return -1;
932 }
933 }
934 return 0;
935 }
936
937 struct ibw_ctx *ibw_init(struct ibw_initattr *attr, int nattr,
938 void *ctx_userdata,
939 ibw_connstate_fn_t ibw_connstate,
940 ibw_receive_fn_t ibw_receive,
941 struct event_context *ectx)
942 {
943 struct ibw_ctx *ctx = talloc_zero(NULL, struct ibw_ctx);
944 struct ibw_ctx_priv *pctx;
945 int rc;
946
947 DEBUG(DEBUG_DEBUG, ("ibw_init(ctx_userdata: %p, ectx: %p)\n", ctx_userdata, ectx));
948
949 /* initialize basic data structures */
950 memset(ibw_lasterr, 0, IBW_LASTERR_BUFSIZE);
951
952 assert(ctx!=NULL);
953 ibw_lasterr[0] = '\0';
954 talloc_set_destructor(ctx, ibw_ctx_destruct);
955 ctx->ctx_userdata = ctx_userdata;
956
957 pctx = talloc_zero(ctx, struct ibw_ctx_priv);
958 talloc_set_destructor(pctx, ibw_ctx_priv_destruct);
959 ctx->internal = (void *)pctx;
960 assert(pctx!=NULL);
961
962 pctx->connstate_func = ibw_connstate;
963 pctx->receive_func = ibw_receive;
964
965 pctx->ectx = ectx;
966
967 /* process attributes */
968 if (ibw_process_init_attrs(attr, nattr, &pctx->opts))
969 goto cleanup;
970
971 /* init cm */
972 pctx->cm_channel = rdma_create_event_channel();
973 if (!pctx->cm_channel) {
974 sprintf(ibw_lasterr, "rdma_create_event_channel error %d\n", errno);
975 goto cleanup;
976 }
977
978 pctx->cm_channel_event = event_add_fd(pctx->ectx, pctx,
979 pctx->cm_channel->fd, EVENT_FD_READ, ibw_event_handler_cm, ctx);
980
981 #if RDMA_USER_CM_MAX_ABI_VERSION >= 2
982 rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx, RDMA_PS_TCP);
983 #else
984 rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx);
985 #endif
986 if (rc) {
987 rc = errno;
988 sprintf(ibw_lasterr, "rdma_create_id error %d\n", rc);
989 goto cleanup;
990 }
991 DEBUG(DEBUG_DEBUG, ("created cm_id %p\n", pctx->cm_id));
992
993 pctx->pagesize = sysconf(_SC_PAGESIZE);
994
995 return ctx;
996 /* don't put code here */
997 cleanup:
998 DEBUG(DEBUG_ERR, (ibw_lasterr));
999
1000 if (ctx)
1001 talloc_free(ctx);
1002
1003 return NULL;
1004 }
1005
1006 int ibw_stop(struct ibw_ctx *ctx)
1007 {
1008 struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal;
1009 struct ibw_conn *p;
1010
1011 DEBUG(DEBUG_DEBUG, ("ibw_stop\n"));
1012
1013 for(p=ctx->conn_list; p!=NULL; p=p->next) {
1014 if (p->state==IBWC_ERROR || p->state==IBWC_CONNECTED) {
1015 if (ibw_disconnect(p))
1016 return -1;
1017 }
1018 }
1019
1020 ctx->state = IBWS_STOPPED;
1021 pctx->connstate_func(ctx, NULL);
1022
1023 return 0;
1024 }
1025
1026 int ibw_bind(struct ibw_ctx *ctx, struct sockaddr_in *my_addr)
1027 {
1028 struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal;
1029 int rc;
1030
1031 DEBUG(DEBUG_DEBUG, ("ibw_bind: addr=%s, port=%u\n",
1032 inet_ntoa(my_addr->sin_addr), ntohs(my_addr->sin_port)));
1033 rc = rdma_bind_addr(pctx->cm_id, (struct sockaddr *) my_addr);
1034 if (rc) {
1035 sprintf(ibw_lasterr, "rdma_bind_addr error %d\n", rc);
1036 DEBUG(DEBUG_ERR, (ibw_lasterr));
1037 return rc;
1038 }
1039 DEBUG(DEBUG_DEBUG, ("rdma_bind_addr successful\n"));
1040
1041 return 0;
1042 }
1043
1044 int ibw_listen(struct ibw_ctx *ctx, int backlog)
1045 {
1046 struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv);
1047 int rc;
1048
1049 DEBUG(DEBUG_DEBUG, ("ibw_listen\n"));
1050 rc = rdma_listen(pctx->cm_id, backlog);
1051 if (rc) {
1052 sprintf(ibw_lasterr, "rdma_listen failed: %d\n", rc);
1053 DEBUG(DEBUG_ERR, (ibw_lasterr));
1054 return rc;
1055 }
1056
1057 return 0;
1058 }
1059
1060 int ibw_accept(struct ibw_ctx *ctx, struct ibw_conn *conn, void *conn_userdata)
1061 {
1062 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1063 struct rdma_conn_param conn_param;
1064 int rc;
1065
1066 DEBUG(DEBUG_DEBUG, ("ibw_accept: cmid=%p\n", pconn->cm_id));
1067 conn->conn_userdata = conn_userdata;
1068
1069 memset(&conn_param, 0, sizeof(struct rdma_conn_param));
1070 conn_param.responder_resources = 1;
1071 conn_param.initiator_depth = 1;
1072 rc = rdma_accept(pconn->cm_id, &conn_param);
1073 if (rc) {
1074 sprintf(ibw_lasterr, "rdma_accept failed %d\n", rc);
1075 DEBUG(DEBUG_ERR, (ibw_lasterr));
1076 return -1;;
1077 }
1078
1079 pconn->is_accepted = 1;
1080
1081 /* continued at RDMA_CM_EVENT_ESTABLISHED */
1082
1083 return 0;
1084 }
1085
1086 int ibw_connect(struct ibw_conn *conn, struct sockaddr_in *serv_addr, void *conn_userdata)
1087 {
1088 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1089 struct ibw_conn_priv *pconn = NULL;
1090 int rc;
1091
1092 assert(conn!=NULL);
1093
1094 conn->conn_userdata = conn_userdata;
1095 pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1096 DEBUG(DEBUG_DEBUG, ("ibw_connect: addr=%s, port=%u\n", inet_ntoa(serv_addr->sin_addr),
1097 ntohs(serv_addr->sin_port)));
1098
1099 /* clean previous - probably half - initialization */
1100 if (ibw_conn_priv_destruct(pconn)) {
1101 DEBUG(DEBUG_ERR, ("ibw_connect/ibw_pconn_destruct failed for cm_id=%p\n", pconn->cm_id));
1102 return -1;
1103 }
1104
1105 /* init cm */
1106 #if RDMA_USER_CM_MAX_ABI_VERSION >= 2
1107 rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn, RDMA_PS_TCP);
1108 #else
1109 rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn);
1110 #endif
1111 if (rc) {
1112 rc = errno;
1113 sprintf(ibw_lasterr, "ibw_connect/rdma_create_id error %d\n", rc);
1114 talloc_free(conn);
1115 return -1;
1116 }
1117 DEBUG(DEBUG_DEBUG, ("ibw_connect: rdma_create_id succeeded, cm_id=%p\n", pconn->cm_id));
1118
1119 rc = rdma_resolve_addr(pconn->cm_id, NULL, (struct sockaddr *) serv_addr, 2000);
1120 if (rc) {
1121 sprintf(ibw_lasterr, "rdma_resolve_addr error %d\n", rc);
1122 DEBUG(DEBUG_ERR, (ibw_lasterr));
1123 talloc_free(conn);
1124 return -1;
1125 }
1126
1127 /* continued at RDMA_CM_EVENT_ADDR_RESOLVED */
1128
1129 return 0;
1130 }
1131
1132 int ibw_disconnect(struct ibw_conn *conn)
1133 {
1134 int rc;
1135 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1136
1137 DEBUG(DEBUG_DEBUG, ("ibw_disconnect: cmid=%p\n", pconn->cm_id));
1138
1139 assert(pconn!=NULL);
1140
1141 switch(conn->state) {
1142 case IBWC_ERROR:
1143 ibw_conn_priv_destruct(pconn); /* do this here right now */
1144 break;
1145 case IBWC_CONNECTED:
1146 rc = rdma_disconnect(pconn->cm_id);
1147 if (rc) {
1148 sprintf(ibw_lasterr, "ibw_disconnect failed with %d\n", rc);
1149 DEBUG(DEBUG_ERR, (ibw_lasterr));
1150 return rc;
1151 }
1152 break;
1153 default:
1154 DEBUG(DEBUG_DEBUG, ("invalid state for disconnect: %d\n", conn->state));
1155 break;
1156 }
1157
1158 return 0;
1159 }
1160
1161 int ibw_alloc_send_buf(struct ibw_conn *conn, void **buf, void **key, uint32_t len)
1162 {
1163 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1164 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1165 struct ibw_wr *p = pconn->wr_list_avail;
1166
1167 if (p!=NULL) {
1168 DEBUG(DEBUG_DEBUG, ("ibw_alloc_send_buf#1: cmid=%p, len=%d\n", pconn->cm_id, len));
1169
1170 DLIST_REMOVE(pconn->wr_list_avail, p);
1171 DLIST_ADD(pconn->wr_list_used, p);
1172
1173 if (len <= pctx->opts.recv_bufsize) {
1174 *buf = (void *)p->buf;
1175 } else {
1176 p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large);
1177 if (p->buf_large==NULL) {
1178 sprintf(ibw_lasterr, "ibw_alloc_mr#1 failed\n");
1179 goto error;
1180 }
1181 *buf = (void *)p->buf_large;
1182 }
1183 /* p->wr_id is already filled in ibw_init_memory */
1184 } else {
1185 DEBUG(DEBUG_DEBUG, ("ibw_alloc_send_buf#2: cmid=%p, len=%d\n", pconn->cm_id, len));
1186 /* not optimized */
1187 p = pconn->extra_avail;
1188 if (!p) {
1189 p = pconn->extra_avail = talloc_zero(pconn, struct ibw_wr);
1190 talloc_set_destructor(p, ibw_wr_destruct);
1191 if (p==NULL) {
1192 sprintf(ibw_lasterr, "talloc_zero failed (emax: %u)\n", pconn->extra_max);
1193 goto error;
1194 }
1195 p->wr_id = pctx->opts.max_send_wr + pconn->extra_max;
1196 pconn->extra_max++;
1197 switch(pconn->extra_max) {
1198 case 1: DEBUG(DEBUG_INFO, ("warning: queue performed\n")); break;
1199 case 10: DEBUG(DEBUG_INFO, ("warning: queue reached 10\n")); break;
1200 case 100: DEBUG(DEBUG_INFO, ("warning: queue reached 100\n")); break;
1201 case 1000: DEBUG(DEBUG_INFO, ("warning: queue reached 1000\n")); break;
1202 default: break;
1203 }
1204 }
1205
1206 p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large);
1207 if (p->buf_large==NULL) {
1208 sprintf(ibw_lasterr, "ibw_alloc_mr#2 failed\n");
1209 goto error;
1210 }
1211 *buf = (void *)p->buf_large;
1212
1213 DLIST_REMOVE(pconn->extra_avail, p);
1214 /* we don't have prepared index for this, so that
1215 * we will have to find this by wr_id later on */
1216 DLIST_ADD(pconn->extra_sent, p);
1217 }
1218
1219 *key = (void *)p;
1220
1221 return 0;
1222 error:
1223 DEBUG(DEBUG_ERR, ("ibw_alloc_send_buf error: %s", ibw_lasterr));
1224 return -1;
1225 }
1226
1227
1228 static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len)
1229 {
1230 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1231 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1232 int rc;
1233
1234 /* can we send it right now? */
1235 if (pconn->wr_sent<pctx->opts.max_send_wr) {
1236 struct ibv_send_wr *bad_wr;
1237 struct ibv_sge list = {
1238 .addr = (uintptr_t)buf,
1239 .length = len,
1240 .lkey = pconn->mr_send->lkey
1241 };
1242 struct ibv_send_wr wr = {
1243 .wr_id = p->wr_id + pctx->opts.max_recv_wr,
1244 .sg_list = &list,
1245 .num_sge = 1,
1246 .opcode = IBV_WR_SEND,
1247 .send_flags = IBV_SEND_SIGNALED,
1248 };
1249
1250 if (p->buf_large==NULL) {
1251 DEBUG(DEBUG_DEBUG, ("ibw_send#normal(cmid: %p, wrid: %u, n: %d)\n",
1252 pconn->cm_id, (uint32_t)wr.wr_id, len));
1253 } else {
1254 DEBUG(DEBUG_DEBUG, ("ibw_send#large(cmid: %p, wrid: %u, n: %d)\n",
1255 pconn->cm_id, (uint32_t)wr.wr_id, len));
1256 list.lkey = p->mr_large->lkey;
1257 }
1258
1259 rc = ibv_post_send(pconn->cm_id->qp, &wr, &bad_wr);
1260 if (rc) {
1261 sprintf(ibw_lasterr, "ibv_post_send error %d (%d)\n",
1262 rc, pconn->wr_sent);
1263 goto error;
1264 }
1265
1266 pconn->wr_sent++;
1267
1268 return rc;
1269 } /* else put the request into our own queue: */
1270
1271 DEBUG(DEBUG_DEBUG, ("ibw_send#queued(cmid: %p, len: %u)\n", pconn->cm_id, len));
1272
1273 /* TODO: clarify how to continue when state==IBWC_STOPPED */
1274
1275 /* to be sent by ibw_wc_send */
1276 /* regardless "normal" or [a part of] "large" packet */
1277 if (!p->queued_ref_cnt) {
1278 DLIST_ADD_END2(pconn->queue, p, struct ibw_wr *,
1279 qprev, qnext); /* TODO: optimize */
1280 p->queued_msg = buf;
1281 }
1282 p->queued_ref_cnt++;
1283 p->queued_rlen = len; /* last wins; see ibw_wc_send */
1284
1285 return 0;
1286 error:
1287 DEBUG(DEBUG_ERR, (ibw_lasterr));
1288 return -1;
1289 }
1290
1291 int ibw_send(struct ibw_conn *conn, void *buf, void *key, uint32_t len)
1292 {
1293 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1294 struct ibw_wr *p = talloc_get_type(key, struct ibw_wr);
1295 int rc;
1296
1297 assert(len>=sizeof(uint32_t));
1298 assert((*((uint32_t *)buf)==len)); /* TODO: htonl */
1299
1300 if (len > pctx->opts.recv_bufsize) {
1301 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1302 int rlen = len;
1303 char *packet = (char *)buf;
1304 uint32_t recv_bufsize = pctx->opts.recv_bufsize;
1305
1306 DEBUG(DEBUG_DEBUG, ("ibw_send#frag(cmid: %p, buf: %p, len: %u)\n",
1307 pconn->cm_id, buf, len));
1308
1309 /* single threaded => no race here: */
1310 assert(p->ref_cnt==0);
1311 while(rlen > recv_bufsize) {
1312 rc = ibw_send_packet(conn, packet, p, recv_bufsize);
1313 if (rc)
1314 return rc;
1315 packet += recv_bufsize;
1316 rlen -= recv_bufsize;
1317 p->ref_cnt++; /* not good to have it in ibw_send_packet */
1318 }
1319 if (rlen) {
1320 rc = ibw_send_packet(conn, packet, p, rlen);
1321 p->ref_cnt++; /* not good to have it in ibw_send_packet */
1322 }
1323 p->ref_cnt--; /* for the same handling */
1324 } else {
1325 assert(p->ref_cnt==0);
1326 assert(p->queued_ref_cnt==0);
1327
1328 rc = ibw_send_packet(conn, buf, p, len);
1329 }
1330 return rc;
1331 }
1332
1333 int ibw_cancel_send_buf(struct ibw_conn *conn, void *buf, void *key)
1334 {
1335 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1336 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1337 struct ibw_wr *p = talloc_get_type(key, struct ibw_wr);
1338
1339 assert(p!=NULL);
1340 assert(buf!=NULL);
1341 assert(conn!=NULL);
1342
1343 if (p->buf_large!=NULL)
1344 ibw_free_mr(&p->buf_large, &p->mr_large);
1345
1346 /* parallel case */
1347 if (p->wr_id < pctx->opts.max_send_wr) {
1348 DEBUG(DEBUG_DEBUG, ("ibw_cancel_send_buf#1 %u", (int)p->wr_id));
1349 DLIST_REMOVE(pconn->wr_list_used, p);
1350 DLIST_ADD(pconn->wr_list_avail, p);
1351 } else { /* "extra" packet */
1352 DEBUG(DEBUG_DEBUG, ("ibw_cancel_send_buf#2 %u", (int)p->wr_id));
1353 DLIST_REMOVE(pconn->extra_sent, p);
1354 DLIST_ADD(pconn->extra_avail, p);
1355 }
1356
1357 return 0;
1358 }
1359
1360 const char *ibw_getLastError(void)
1361 {
1362 return ibw_lasterr;
1363 }
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