2 * Unix SMB/CIFS implementation.
3 * Wrap Infiniband calls.
5 * Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
7 * Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
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.
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.
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/>.
27 #include <sys/types.h>
28 #include <netinet/in.h>
29 #include <sys/socket.h>
31 #include <arpa/inet.h>
37 #include "lib/events/events.h"
38 #include "ibwrapper.h"
40 #include <infiniband/kern-abi.h>
41 #include <rdma/rdma_cma_abi.h>
42 #include <rdma/rdma_cma.h>
44 #include "ibwrapper_internal.h"
45 #include "lib/util/dlinklist.h"
47 #define IBW_LASTERR_BUFSIZE 512
48 static char ibw_lasterr[IBW_LASTERR_BUFSIZE];
50 #define IBW_MAX_SEND_WR 256
51 #define IBW_MAX_RECV_WR 1024
52 #define IBW_RECV_BUFSIZE 256
53 #define IBW_RECV_THRESHOLD (1 * 1024 * 1024)
55 static void ibw_event_handler_verbs(struct event_context *ev,
56 struct fd_event *fde, uint16_t flags, void *private_data);
57 static int ibw_fill_cq(struct ibw_conn *conn);
58 static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc);
59 static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc);
60 static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len);
62 static void *ibw_alloc_mr(struct ibw_ctx_priv *pctx, struct ibw_conn_priv *pconn,
63 uint32_t n, struct ibv_mr **ppmr)
67 DEBUG(DEBUG_DEBUG, ("ibw_alloc_mr(cmid=%p, n=%u)\n", pconn->cm_id, n));
68 buf = memalign(pctx->pagesize, n);
70 sprintf(ibw_lasterr, "couldn't allocate memory\n");
74 *ppmr = ibv_reg_mr(pconn->pd, buf, n, IBV_ACCESS_LOCAL_WRITE);
76 sprintf(ibw_lasterr, "couldn't allocate mr\n");
84 static void ibw_free_mr(char **ppbuf, struct ibv_mr **ppmr)
86 DEBUG(DEBUG_DEBUG, ("ibw_free_mr(%p %p)\n", *ppbuf, *ppmr));
97 static int ibw_init_memory(struct ibw_conn *conn)
99 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
100 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
101 struct ibw_opts *opts = &pctx->opts;
105 DEBUG(DEBUG_DEBUG, ("ibw_init_memory(cmid: %p)\n", pconn->cm_id));
106 pconn->buf_send = ibw_alloc_mr(pctx, pconn,
107 opts->max_send_wr * opts->recv_bufsize, &pconn->mr_send);
108 if (!pconn->buf_send) {
109 sprintf(ibw_lasterr, "couldn't allocate work send buf\n");
113 pconn->buf_recv = ibw_alloc_mr(pctx, pconn,
114 opts->max_recv_wr * opts->recv_bufsize, &pconn->mr_recv);
115 if (!pconn->buf_recv) {
116 sprintf(ibw_lasterr, "couldn't allocate work recv buf\n");
120 pconn->wr_index = talloc_size(pconn, opts->max_send_wr * sizeof(struct ibw_wr *));
121 assert(pconn->wr_index!=NULL);
123 for(i=0; i<opts->max_send_wr; i++) {
124 p = pconn->wr_index[i] = talloc_zero(pconn, struct ibw_wr);
125 p->buf = pconn->buf_send + (i * opts->recv_bufsize);
128 DLIST_ADD(pconn->wr_list_avail, p);
134 static int ibw_ctx_priv_destruct(struct ibw_ctx_priv *pctx)
136 DEBUG(DEBUG_DEBUG, ("ibw_ctx_priv_destruct(%p)\n", pctx));
139 if (pctx->cm_channel) {
140 rdma_destroy_event_channel(pctx->cm_channel);
141 pctx->cm_channel = NULL;
143 if (pctx->cm_channel_event) {
144 /* TODO: do we have to do this here? */
145 talloc_free(pctx->cm_channel_event);
146 pctx->cm_channel_event = NULL;
149 rdma_destroy_id(pctx->cm_id);
156 static int ibw_ctx_destruct(struct ibw_ctx *ctx)
158 DEBUG(DEBUG_DEBUG, ("ibw_ctx_destruct(%p)\n", ctx));
162 static int ibw_conn_priv_destruct(struct ibw_conn_priv *pconn)
164 DEBUG(DEBUG_DEBUG, ("ibw_conn_priv_destruct(%p, cmid: %p)\n",
165 pconn, pconn->cm_id));
167 /* pconn->wr_index is freed by talloc */
168 /* pconn->wr_index[i] are freed by talloc */
171 if (pconn->cm_id!=NULL && pconn->cm_id->qp!=NULL) {
172 rdma_destroy_qp(pconn->cm_id);
173 pconn->cm_id->qp = NULL;
176 if (pconn->cq!=NULL) {
177 ibv_destroy_cq(pconn->cq);
181 if (pconn->verbs_channel!=NULL) {
182 ibv_destroy_comp_channel(pconn->verbs_channel);
183 pconn->verbs_channel = NULL;
186 /* must be freed here because its order is important */
187 if (pconn->verbs_channel_event) {
188 talloc_free(pconn->verbs_channel_event);
189 pconn->verbs_channel_event = NULL;
192 /* free memory regions */
193 ibw_free_mr(&pconn->buf_send, &pconn->mr_send);
194 ibw_free_mr(&pconn->buf_recv, &pconn->mr_recv);
197 ibv_dealloc_pd(pconn->pd);
199 DEBUG(DEBUG_DEBUG, ("pconn=%p pd deallocated\n", pconn));
203 rdma_destroy_id(pconn->cm_id);
205 DEBUG(DEBUG_DEBUG, ("pconn=%p cm_id destroyed\n", pconn));
211 static int ibw_wr_destruct(struct ibw_wr *wr)
213 if (wr->buf_large!=NULL)
214 ibw_free_mr(&wr->buf_large, &wr->mr_large);
218 static int ibw_conn_destruct(struct ibw_conn *conn)
220 DEBUG(DEBUG_DEBUG, ("ibw_conn_destruct(%p)\n", conn));
222 /* important here: ctx is a talloc _parent_ */
223 DLIST_REMOVE(conn->ctx->conn_list, conn);
227 struct ibw_conn *ibw_conn_new(struct ibw_ctx *ctx, TALLOC_CTX *mem_ctx)
229 struct ibw_conn *conn;
230 struct ibw_conn_priv *pconn;
234 conn = talloc_zero(mem_ctx, struct ibw_conn);
236 talloc_set_destructor(conn, ibw_conn_destruct);
238 pconn = talloc_zero(conn, struct ibw_conn_priv);
240 talloc_set_destructor(pconn, ibw_conn_priv_destruct);
243 conn->internal = (void *)pconn;
245 DLIST_ADD(ctx->conn_list, conn);
250 static int ibw_setup_cq_qp(struct ibw_conn *conn)
252 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
253 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
254 struct ibv_qp_init_attr init_attr;
255 struct ibv_qp_attr attr;
258 DEBUG(DEBUG_DEBUG, ("ibw_setup_cq_qp(cmid: %p)\n", pconn->cm_id));
261 pconn->verbs_channel = ibv_create_comp_channel(pconn->cm_id->verbs);
262 if (!pconn->verbs_channel) {
263 sprintf(ibw_lasterr, "ibv_create_comp_channel failed %d\n", errno);
266 DEBUG(DEBUG_DEBUG, ("created channel %p\n", pconn->verbs_channel));
268 pconn->verbs_channel_event = event_add_fd(pctx->ectx, NULL, /* not pconn or conn */
269 pconn->verbs_channel->fd, EVENT_FD_READ, ibw_event_handler_verbs, conn);
271 pconn->pd = ibv_alloc_pd(pconn->cm_id->verbs);
273 sprintf(ibw_lasterr, "ibv_alloc_pd failed %d\n", errno);
276 DEBUG(DEBUG_DEBUG, ("created pd %p\n", pconn->pd));
279 if (ibw_init_memory(conn))
283 pconn->cq = ibv_create_cq(pconn->cm_id->verbs,
284 pctx->opts.max_recv_wr + pctx->opts.max_send_wr,
285 conn, pconn->verbs_channel, 0);
286 if (pconn->cq==NULL) {
287 sprintf(ibw_lasterr, "ibv_create_cq failed\n");
291 rc = ibv_req_notify_cq(pconn->cq, 0);
293 sprintf(ibw_lasterr, "ibv_req_notify_cq failed with %d\n", rc);
298 memset(&init_attr, 0, sizeof(init_attr));
299 init_attr.cap.max_send_wr = pctx->opts.max_send_wr;
300 init_attr.cap.max_recv_wr = pctx->opts.max_recv_wr;
301 init_attr.cap.max_recv_sge = 1;
302 init_attr.cap.max_send_sge = 1;
303 init_attr.qp_type = IBV_QPT_RC;
304 init_attr.send_cq = pconn->cq;
305 init_attr.recv_cq = pconn->cq;
307 rc = rdma_create_qp(pconn->cm_id, pconn->pd, &init_attr);
309 sprintf(ibw_lasterr, "rdma_create_qp failed with %d\n", rc);
312 /* elase result is in pconn->cm_id->qp */
314 rc = ibv_query_qp(pconn->cm_id->qp, &attr, IBV_QP_PATH_MTU, &init_attr);
316 sprintf(ibw_lasterr, "ibv_query_qp failed with %d\n", rc);
320 return ibw_fill_cq(conn);
323 static int ibw_refill_cq_recv(struct ibw_conn *conn)
325 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
326 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
328 struct ibv_sge list = {
329 .addr = (uintptr_t) NULL, /* filled below */
330 .length = pctx->opts.recv_bufsize,
331 .lkey = pconn->mr_recv->lkey /* always the same */
333 struct ibv_recv_wr wr = {
334 .wr_id = 0, /* filled below */
338 struct ibv_recv_wr *bad_wr;
340 DEBUG(DEBUG_DEBUG, ("ibw_refill_cq_recv(cmid: %p)\n", pconn->cm_id));
342 list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index;
343 wr.wr_id = pconn->recv_index;
344 pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr;
346 rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr);
348 sprintf(ibw_lasterr, "refill/ibv_post_recv failed with %d\n", rc);
349 DEBUG(DEBUG_ERR, (ibw_lasterr));
356 static int ibw_fill_cq(struct ibw_conn *conn)
358 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
359 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
361 struct ibv_sge list = {
362 .addr = (uintptr_t) NULL, /* filled below */
363 .length = pctx->opts.recv_bufsize,
364 .lkey = pconn->mr_recv->lkey /* always the same */
366 struct ibv_recv_wr wr = {
367 .wr_id = 0, /* filled below */
371 struct ibv_recv_wr *bad_wr;
373 DEBUG(DEBUG_DEBUG, ("ibw_fill_cq(cmid: %p)\n", pconn->cm_id));
375 for(i = pctx->opts.max_recv_wr; i!=0; i--) {
376 list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index;
377 wr.wr_id = pconn->recv_index;
378 pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr;
380 rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr);
382 sprintf(ibw_lasterr, "fill/ibv_post_recv failed with %d\n", rc);
383 DEBUG(DEBUG_ERR, (ibw_lasterr));
391 static int ibw_manage_connect(struct ibw_conn *conn)
393 struct rdma_conn_param conn_param;
394 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
397 DEBUG(DEBUG_DEBUG, ("ibw_manage_connect(cmid: %p)\n", pconn->cm_id));
399 if (ibw_setup_cq_qp(conn))
403 memset(&conn_param, 0, sizeof conn_param);
404 conn_param.responder_resources = 1;
405 conn_param.initiator_depth = 1;
406 conn_param.retry_count = 10;
408 rc = rdma_connect(pconn->cm_id, &conn_param);
410 sprintf(ibw_lasterr, "rdma_connect error %d\n", rc);
415 static void ibw_event_handler_cm(struct event_context *ev,
416 struct fd_event *fde, uint16_t flags, void *private_data)
419 struct ibw_ctx *ctx = talloc_get_type(private_data, struct ibw_ctx);
420 struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv);
421 struct ibw_conn *conn = NULL;
422 struct ibw_conn_priv *pconn = NULL;
423 struct rdma_cm_id *cma_id = NULL;
424 struct rdma_cm_event *event = NULL;
428 rc = rdma_get_cm_event(pctx->cm_channel, &event);
430 ctx->state = IBWS_ERROR;
432 sprintf(ibw_lasterr, "rdma_get_cm_event error %d\n", rc);
437 DEBUG(DEBUG_DEBUG, ("cma_event type %d cma_id %p (%s)\n", event->event, cma_id,
438 (cma_id == pctx->cm_id) ? "parent" : "child"));
440 switch (event->event) {
441 case RDMA_CM_EVENT_ADDR_RESOLVED:
442 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_ADDR_RESOLVED\n"));
443 /* continuing from ibw_connect ... */
444 rc = rdma_resolve_route(cma_id, 2000);
446 sprintf(ibw_lasterr, "rdma_resolve_route error %d\n", rc);
449 /* continued at RDMA_CM_EVENT_ROUTE_RESOLVED */
452 case RDMA_CM_EVENT_ROUTE_RESOLVED:
453 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_ROUTE_RESOLVED\n"));
454 /* after RDMA_CM_EVENT_ADDR_RESOLVED: */
455 assert(cma_id->context!=NULL);
456 conn = talloc_get_type(cma_id->context, struct ibw_conn);
458 rc = ibw_manage_connect(conn);
464 case RDMA_CM_EVENT_CONNECT_REQUEST:
465 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_CONNECT_REQUEST\n"));
466 ctx->state = IBWS_CONNECT_REQUEST;
467 conn = ibw_conn_new(ctx, ctx);
468 pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
469 pconn->cm_id = cma_id; /* !!! event will be freed but id not */
470 cma_id->context = (void *)conn;
471 DEBUG(DEBUG_DEBUG, ("pconn->cm_id %p\n", pconn->cm_id));
473 if (ibw_setup_cq_qp(conn))
476 conn->state = IBWC_INIT;
477 pctx->connstate_func(ctx, conn);
479 /* continued at ibw_accept when invoked by the func above */
480 if (!pconn->is_accepted) {
481 rc = rdma_reject(cma_id, NULL, 0);
483 DEBUG(DEBUG_ERR, ("rdma_reject failed with rc=%d\n", rc));
485 DEBUG(DEBUG_DEBUG, ("pconn->cm_id %p wasn't accepted\n", pconn->cm_id));
488 /* TODO: clarify whether if it's needed by upper layer: */
489 ctx->state = IBWS_READY;
490 pctx->connstate_func(ctx, NULL);
492 /* NOTE: more requests can arrive until RDMA_CM_EVENT_ESTABLISHED ! */
495 case RDMA_CM_EVENT_ESTABLISHED:
496 /* expected after ibw_accept and ibw_connect[not directly] */
497 DEBUG(DEBUG_INFO, ("ESTABLISHED (conn: %p)\n", cma_id->context));
498 conn = talloc_get_type(cma_id->context, struct ibw_conn);
499 assert(conn!=NULL); /* important assumption */
501 DEBUG(DEBUG_DEBUG, ("ibw_setup_cq_qp succeeded (cmid=%p)\n", cma_id));
503 /* client conn is up */
504 conn->state = IBWC_CONNECTED;
506 /* both ctx and conn have changed */
507 pctx->connstate_func(ctx, conn);
510 case RDMA_CM_EVENT_ADDR_ERROR:
511 sprintf(ibw_lasterr, "RDMA_CM_EVENT_ADDR_ERROR, error %d\n", event->status);
512 case RDMA_CM_EVENT_ROUTE_ERROR:
513 sprintf(ibw_lasterr, "RDMA_CM_EVENT_ROUTE_ERROR, error %d\n", event->status);
514 case RDMA_CM_EVENT_CONNECT_ERROR:
515 sprintf(ibw_lasterr, "RDMA_CM_EVENT_CONNECT_ERROR, error %d\n", event->status);
516 case RDMA_CM_EVENT_UNREACHABLE:
517 sprintf(ibw_lasterr, "RDMA_CM_EVENT_UNREACHABLE, error %d\n", event->status);
519 case RDMA_CM_EVENT_REJECTED:
520 sprintf(ibw_lasterr, "RDMA_CM_EVENT_REJECTED, error %d\n", event->status);
521 DEBUG(DEBUG_INFO, ("cm event handler: %s", ibw_lasterr));
522 conn = talloc_get_type(cma_id->context, struct ibw_conn);
524 /* must be done BEFORE connstate */
525 if ((rc=rdma_ack_cm_event(event)))
526 DEBUG(DEBUG_ERR, ("reject/rdma_ack_cm_event failed with %d\n", rc));
527 event = NULL; /* not to touch cma_id or conn */
528 conn->state = IBWC_ERROR;
529 /* it should free the conn */
530 pctx->connstate_func(NULL, conn);
532 break; /* this is not strictly an error */
534 case RDMA_CM_EVENT_DISCONNECTED:
535 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_DISCONNECTED\n"));
536 if ((rc=rdma_ack_cm_event(event)))
537 DEBUG(DEBUG_ERR, ("disc/rdma_ack_cm_event failed with %d\n", rc));
538 event = NULL; /* don't ack more */
540 if (cma_id!=pctx->cm_id) {
541 DEBUG(DEBUG_ERR, ("client DISCONNECT event cm_id=%p\n", cma_id));
542 conn = talloc_get_type(cma_id->context, struct ibw_conn);
543 conn->state = IBWC_DISCONNECTED;
544 pctx->connstate_func(NULL, conn);
548 case RDMA_CM_EVENT_DEVICE_REMOVAL:
549 sprintf(ibw_lasterr, "cma detected device removal!\n");
553 sprintf(ibw_lasterr, "unknown event %d\n", event->event);
557 if (event!=NULL && (rc=rdma_ack_cm_event(event))) {
558 sprintf(ibw_lasterr, "rdma_ack_cm_event failed with %d\n", rc);
564 DEBUG(DEBUG_ERR, ("cm event handler: %s", ibw_lasterr));
567 if (cma_id!=NULL && cma_id!=pctx->cm_id) {
568 conn = talloc_get_type(cma_id->context, struct ibw_conn);
570 conn->state = IBWC_ERROR;
571 pctx->connstate_func(NULL, conn);
574 ctx->state = IBWS_ERROR;
575 pctx->connstate_func(ctx, NULL);
578 if ((rc=rdma_ack_cm_event(event))!=0) {
579 DEBUG(DEBUG_ERR, ("rdma_ack_cm_event failed with %d\n", rc));
586 static void ibw_event_handler_verbs(struct event_context *ev,
587 struct fd_event *fde, uint16_t flags, void *private_data)
589 struct ibw_conn *conn = talloc_get_type(private_data, struct ibw_conn);
590 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
591 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
595 struct ibv_cq *ev_cq;
598 DEBUG(DEBUG_DEBUG, ("ibw_event_handler_verbs(%u)\n", (uint32_t)flags));
600 /* TODO: check whether if it's good to have more channels here... */
601 rc = ibv_get_cq_event(pconn->verbs_channel, &ev_cq, &ev_ctx);
603 sprintf(ibw_lasterr, "Failed to get cq_event with %d\n", rc);
606 if (ev_cq != pconn->cq) {
607 sprintf(ibw_lasterr, "ev_cq(%p) != pconn->cq(%p)\n", ev_cq, pconn->cq);
610 rc = ibv_req_notify_cq(pconn->cq, 0);
612 sprintf(ibw_lasterr, "Couldn't request CQ notification (%d)\n", rc);
616 while((rc=ibv_poll_cq(pconn->cq, 1, &wc))==1) {
618 sprintf(ibw_lasterr, "cq completion failed status=%d, opcode=%d, rc=%d\n",
619 wc.status, wc.opcode, rc);
625 DEBUG(DEBUG_DEBUG, ("send completion\n"));
626 if (ibw_wc_send(conn, &wc))
630 case IBV_WC_RDMA_WRITE:
631 DEBUG(DEBUG_DEBUG, ("rdma write completion\n"));
634 case IBV_WC_RDMA_READ:
635 DEBUG(DEBUG_DEBUG, ("rdma read completion\n"));
639 DEBUG(DEBUG_DEBUG, ("recv completion\n"));
640 if (ibw_wc_recv(conn, &wc))
645 sprintf(ibw_lasterr, "unknown completion %d\n", wc.opcode);
650 sprintf(ibw_lasterr, "ibv_poll_cq error %d\n", rc);
654 ibv_ack_cq_events(pconn->cq, 1);
658 ibv_ack_cq_events(pconn->cq, 1);
660 DEBUG(DEBUG_ERR, (ibw_lasterr));
662 if (conn->state!=IBWC_ERROR) {
663 conn->state = IBWC_ERROR;
664 pctx->connstate_func(NULL, conn);
668 static int ibw_process_queue(struct ibw_conn *conn)
670 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
671 struct ibw_ctx_priv *pctx;
676 if (pconn->queue==NULL)
681 /* we must have at least 1 fragment to send */
682 assert(p->queued_ref_cnt>0);
685 pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
686 msg_size = (p->queued_ref_cnt) ? pctx->opts.recv_bufsize : p->queued_rlen;
688 assert(p->queued_msg!=NULL);
691 DEBUG(DEBUG_DEBUG, ("ibw_process_queue refcnt=%d msgsize=%u\n",
692 p->queued_ref_cnt, msg_size));
694 rc = ibw_send_packet(conn, p->queued_msg, p, msg_size);
696 /* was this the last fragment? */
697 if (p->queued_ref_cnt) {
698 p->queued_msg += pctx->opts.recv_bufsize;
700 DLIST_REMOVE2(pconn->queue, p, qprev, qnext);
701 p->queued_msg = NULL;
707 static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc)
709 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
710 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
714 DEBUG(DEBUG_DEBUG, ("ibw_wc_send(cmid: %p, wr_id: %u, bl: %u)\n",
715 pconn->cm_id, (uint32_t)wc->wr_id, (uint32_t)wc->byte_len));
717 assert(pconn->cm_id->qp->qp_num==wc->qp_num);
718 assert(wc->wr_id >= pctx->opts.max_recv_wr);
719 send_index = wc->wr_id - pctx->opts.max_recv_wr;
722 if (send_index < pctx->opts.max_send_wr) {
723 DEBUG(DEBUG_DEBUG, ("ibw_wc_send#1 %u\n", (int)wc->wr_id));
724 p = pconn->wr_index[send_index];
725 if (p->buf_large!=NULL) {
727 /* awaiting more of it... */
730 ibw_free_mr(&p->buf_large, &p->mr_large);
731 DLIST_REMOVE(pconn->wr_list_used, p);
732 DLIST_ADD(pconn->wr_list_avail, p);
734 } else { /* nasty - but necessary */
735 DLIST_REMOVE(pconn->wr_list_used, p);
736 DLIST_ADD(pconn->wr_list_avail, p);
738 } else { /* "extra" request - not optimized */
739 DEBUG(DEBUG_DEBUG, ("ibw_wc_send#2 %u\n", (int)wc->wr_id));
740 for(p=pconn->extra_sent; p!=NULL; p=p->next)
741 if ((p->wr_id + pctx->opts.max_recv_wr)==(int)wc->wr_id)
744 sprintf(ibw_lasterr, "failed to find wr_id %d\n", (int)wc->wr_id);
750 ibw_free_mr(&p->buf_large, &p->mr_large);
751 DLIST_REMOVE(pconn->extra_sent, p);
752 DLIST_ADD(pconn->extra_avail, p);
756 return ibw_process_queue(conn);
759 static int ibw_append_to_part(struct ibw_conn_priv *pconn,
760 struct ibw_part *part, char **pp, uint32_t add_len, int info)
762 DEBUG(DEBUG_DEBUG, ("ibw_append_to_part: cmid=%p, (bs=%u, len=%u, tr=%u), al=%u, i=%u\n",
763 pconn->cm_id, part->bufsize, part->len, part->to_read, add_len, info));
765 /* allocate more if necessary - it's an "evergrowing" buffer... */
766 if (part->len + add_len > part->bufsize) {
767 if (part->buf==NULL) {
768 assert(part->len==0);
769 part->buf = talloc_size(pconn, add_len);
770 if (part->buf==NULL) {
771 sprintf(ibw_lasterr, "recv talloc_size error (%u) #%d\n",
775 part->bufsize = add_len;
777 part->buf = talloc_realloc_size(pconn,
778 part->buf, part->len + add_len);
779 if (part->buf==NULL) {
780 sprintf(ibw_lasterr, "recv realloc error (%u + %u) #%d\n",
781 part->len, add_len, info);
785 part->bufsize = part->len + add_len;
789 memcpy(part->buf + part->len, *pp, add_len);
791 part->len += add_len;
792 part->to_read -= add_len;
797 static int ibw_wc_mem_threshold(struct ibw_conn_priv *pconn,
798 struct ibw_part *part, uint32_t threshold)
800 DEBUG(DEBUG_DEBUG, ("ibw_wc_mem_threshold: cmid=%p, (bs=%u, len=%u, tr=%u), thr=%u\n",
801 pconn->cm_id, part->bufsize, part->len, part->to_read, threshold));
803 if (part->bufsize > threshold) {
804 DEBUG(DEBUG_DEBUG, ("ibw_wc_mem_threshold: cmid=%p, %u > %u\n",
805 pconn->cm_id, part->bufsize, threshold));
806 talloc_free(part->buf);
807 part->buf = talloc_size(pconn, threshold);
808 if (part->buf==NULL) {
809 sprintf(ibw_lasterr, "talloc_size failed\n");
812 part->bufsize = threshold;
817 static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc)
819 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
820 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
821 struct ibw_part *part = &pconn->part;
823 uint32_t remain = wc->byte_len;
825 DEBUG(DEBUG_DEBUG, ("ibw_wc_recv: cmid=%p, wr_id: %u, bl: %u\n",
826 pconn->cm_id, (uint32_t)wc->wr_id, remain));
828 assert(pconn->cm_id->qp->qp_num==wc->qp_num);
829 assert((int)wc->wr_id < pctx->opts.max_recv_wr);
830 assert(wc->byte_len <= pctx->opts.recv_bufsize);
832 p = pconn->buf_recv + ((int)wc->wr_id * pctx->opts.recv_bufsize);
835 /* here always true: (part->len!=0 && part->to_read!=0) ||
836 (part->len==0 && part->to_read==0) */
837 if (part->len) { /* is there a partial msg to be continued? */
838 int read_len = (part->to_read<=remain) ? part->to_read : remain;
839 if (ibw_append_to_part(pconn, part, &p, read_len, 421))
843 if (part->len<=sizeof(uint32_t) && part->to_read==0) {
844 assert(part->len==sizeof(uint32_t));
845 /* set it again now... */
846 part->to_read = *((uint32_t *)(part->buf)); /* TODO: ntohl */
847 if (part->to_read<sizeof(uint32_t)) {
848 sprintf(ibw_lasterr, "got msglen=%u #2\n", part->to_read);
851 part->to_read -= sizeof(uint32_t); /* it's already read */
854 if (part->to_read==0) {
855 if (pctx->receive_func(conn, part->buf, part->len) != 0) {
858 part->len = 0; /* tells not having partial data (any more) */
859 if (ibw_wc_mem_threshold(pconn, part, pctx->opts.recv_threshold))
863 if (remain>=sizeof(uint32_t)) {
864 uint32_t msglen = *(uint32_t *)p; /* TODO: ntohl */
865 if (msglen<sizeof(uint32_t)) {
866 sprintf(ibw_lasterr, "got msglen=%u\n", msglen);
870 /* mostly awaited case: */
871 if (msglen<=remain) {
872 if (pctx->receive_func(conn, p, msglen) != 0) {
878 part->to_read = msglen;
879 /* part->len is already 0 */
880 if (ibw_append_to_part(pconn, part, &p, remain, 422))
882 remain = 0; /* to be continued ... */
883 /* part->to_read > 0 here */
885 } else { /* edge case: */
886 part->to_read = sizeof(uint32_t);
887 /* part->len is already 0 */
888 if (ibw_append_to_part(pconn, part, &p, remain, 423))
891 /* part->to_read > 0 here */
894 } /* <remain> is always decreased at least by 1 */
896 if (ibw_refill_cq_recv(conn))
902 DEBUG(DEBUG_ERR, ("ibw_wc_recv error: %s", ibw_lasterr));
906 static int ibw_process_init_attrs(struct ibw_initattr *attr, int nattr, struct ibw_opts *opts)
909 const char *name, *value;
911 DEBUG(DEBUG_DEBUG, ("ibw_process_init_attrs: nattr: %d\n", nattr));
913 opts->max_send_wr = IBW_MAX_SEND_WR;
914 opts->max_recv_wr = IBW_MAX_RECV_WR;
915 opts->recv_bufsize = IBW_RECV_BUFSIZE;
916 opts->recv_threshold = IBW_RECV_THRESHOLD;
918 for(i=0; i<nattr; i++) {
920 value = attr[i].value;
922 assert(name!=NULL && value!=NULL);
923 if (strcmp(name, "max_send_wr")==0)
924 opts->max_send_wr = atoi(value);
925 else if (strcmp(name, "max_recv_wr")==0)
926 opts->max_recv_wr = atoi(value);
927 else if (strcmp(name, "recv_bufsize")==0)
928 opts->recv_bufsize = atoi(value);
929 else if (strcmp(name, "recv_threshold")==0)
930 opts->recv_threshold = atoi(value);
932 sprintf(ibw_lasterr, "ibw_init: unknown name %s\n", name);
939 struct ibw_ctx *ibw_init(struct ibw_initattr *attr, int nattr,
941 ibw_connstate_fn_t ibw_connstate,
942 ibw_receive_fn_t ibw_receive,
943 struct event_context *ectx)
945 struct ibw_ctx *ctx = talloc_zero(NULL, struct ibw_ctx);
946 struct ibw_ctx_priv *pctx;
949 DEBUG(DEBUG_DEBUG, ("ibw_init(ctx_userdata: %p, ectx: %p)\n", ctx_userdata, ectx));
951 /* initialize basic data structures */
952 memset(ibw_lasterr, 0, IBW_LASTERR_BUFSIZE);
955 ibw_lasterr[0] = '\0';
956 talloc_set_destructor(ctx, ibw_ctx_destruct);
957 ctx->ctx_userdata = ctx_userdata;
959 pctx = talloc_zero(ctx, struct ibw_ctx_priv);
960 talloc_set_destructor(pctx, ibw_ctx_priv_destruct);
961 ctx->internal = (void *)pctx;
964 pctx->connstate_func = ibw_connstate;
965 pctx->receive_func = ibw_receive;
969 /* process attributes */
970 if (ibw_process_init_attrs(attr, nattr, &pctx->opts))
974 pctx->cm_channel = rdma_create_event_channel();
975 if (!pctx->cm_channel) {
976 sprintf(ibw_lasterr, "rdma_create_event_channel error %d\n", errno);
980 pctx->cm_channel_event = event_add_fd(pctx->ectx, pctx,
981 pctx->cm_channel->fd, EVENT_FD_READ, ibw_event_handler_cm, ctx);
983 #if RDMA_USER_CM_MAX_ABI_VERSION >= 2
984 rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx, RDMA_PS_TCP);
986 rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx);
990 sprintf(ibw_lasterr, "rdma_create_id error %d\n", rc);
993 DEBUG(DEBUG_DEBUG, ("created cm_id %p\n", pctx->cm_id));
995 pctx->pagesize = sysconf(_SC_PAGESIZE);
998 /* don't put code here */
1000 DEBUG(DEBUG_ERR, (ibw_lasterr));
1008 int ibw_stop(struct ibw_ctx *ctx)
1010 struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal;
1013 DEBUG(DEBUG_DEBUG, ("ibw_stop\n"));
1015 for(p=ctx->conn_list; p!=NULL; p=p->next) {
1016 if (ctx->state==IBWC_ERROR || ctx->state==IBWC_CONNECTED) {
1017 if (ibw_disconnect(p))
1022 ctx->state = IBWS_STOPPED;
1023 pctx->connstate_func(ctx, NULL);
1028 int ibw_bind(struct ibw_ctx *ctx, struct sockaddr_in *my_addr)
1030 struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal;
1033 DEBUG(DEBUG_DEBUG, ("ibw_bind: addr=%s, port=%u\n",
1034 inet_ntoa(my_addr->sin_addr), ntohs(my_addr->sin_port)));
1035 rc = rdma_bind_addr(pctx->cm_id, (struct sockaddr *) my_addr);
1037 sprintf(ibw_lasterr, "rdma_bind_addr error %d\n", rc);
1038 DEBUG(DEBUG_ERR, (ibw_lasterr));
1041 DEBUG(DEBUG_DEBUG, ("rdma_bind_addr successful\n"));
1046 int ibw_listen(struct ibw_ctx *ctx, int backlog)
1048 struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv);
1051 DEBUG(DEBUG_DEBUG, ("ibw_listen\n"));
1052 rc = rdma_listen(pctx->cm_id, backlog);
1054 sprintf(ibw_lasterr, "rdma_listen failed: %d\n", rc);
1055 DEBUG(DEBUG_ERR, (ibw_lasterr));
1062 int ibw_accept(struct ibw_ctx *ctx, struct ibw_conn *conn, void *conn_userdata)
1064 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1065 struct rdma_conn_param conn_param;
1068 DEBUG(DEBUG_DEBUG, ("ibw_accept: cmid=%p\n", pconn->cm_id));
1069 conn->conn_userdata = conn_userdata;
1071 memset(&conn_param, 0, sizeof(struct rdma_conn_param));
1072 conn_param.responder_resources = 1;
1073 conn_param.initiator_depth = 1;
1074 rc = rdma_accept(pconn->cm_id, &conn_param);
1076 sprintf(ibw_lasterr, "rdma_accept failed %d\n", rc);
1077 DEBUG(DEBUG_ERR, (ibw_lasterr));
1081 pconn->is_accepted = 1;
1083 /* continued at RDMA_CM_EVENT_ESTABLISHED */
1088 int ibw_connect(struct ibw_conn *conn, struct sockaddr_in *serv_addr, void *conn_userdata)
1090 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1091 struct ibw_conn_priv *pconn = NULL;
1096 conn->conn_userdata = conn_userdata;
1097 pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1098 DEBUG(DEBUG_DEBUG, ("ibw_connect: addr=%s, port=%u\n", inet_ntoa(serv_addr->sin_addr),
1099 ntohs(serv_addr->sin_port)));
1101 /* clean previous - probably half - initialization */
1102 if (ibw_conn_priv_destruct(pconn)) {
1103 DEBUG(DEBUG_ERR, ("ibw_connect/ibw_pconn_destruct failed for cm_id=%p\n", pconn->cm_id));
1108 #if RDMA_USER_CM_MAX_ABI_VERSION >= 2
1109 rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn, RDMA_PS_TCP);
1111 rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn);
1115 sprintf(ibw_lasterr, "ibw_connect/rdma_create_id error %d\n", rc);
1119 DEBUG(DEBUG_DEBUG, ("ibw_connect: rdma_create_id succeeded, cm_id=%p\n", pconn->cm_id));
1121 rc = rdma_resolve_addr(pconn->cm_id, NULL, (struct sockaddr *) serv_addr, 2000);
1123 sprintf(ibw_lasterr, "rdma_resolve_addr error %d\n", rc);
1124 DEBUG(DEBUG_ERR, (ibw_lasterr));
1129 /* continued at RDMA_CM_EVENT_ADDR_RESOLVED */
1134 int ibw_disconnect(struct ibw_conn *conn)
1137 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1139 DEBUG(DEBUG_DEBUG, ("ibw_disconnect: cmid=%p\n", pconn->cm_id));
1141 assert(pconn!=NULL);
1143 switch(conn->state) {
1145 ibw_conn_priv_destruct(pconn); /* do this here right now */
1147 case IBWC_CONNECTED:
1148 rc = rdma_disconnect(pconn->cm_id);
1150 sprintf(ibw_lasterr, "ibw_disconnect failed with %d\n", rc);
1151 DEBUG(DEBUG_ERR, (ibw_lasterr));
1156 DEBUG(DEBUG_DEBUG, ("invalid state for disconnect: %d\n", conn->state));
1163 int ibw_alloc_send_buf(struct ibw_conn *conn, void **buf, void **key, uint32_t len)
1165 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1166 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1167 struct ibw_wr *p = pconn->wr_list_avail;
1170 DEBUG(DEBUG_DEBUG, ("ibw_alloc_send_buf#1: cmid=%p, len=%d\n", pconn->cm_id, len));
1172 DLIST_REMOVE(pconn->wr_list_avail, p);
1173 DLIST_ADD(pconn->wr_list_used, p);
1175 if (len <= pctx->opts.recv_bufsize) {
1176 *buf = (void *)p->buf;
1178 p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large);
1179 if (p->buf_large==NULL) {
1180 sprintf(ibw_lasterr, "ibw_alloc_mr#1 failed\n");
1183 *buf = (void *)p->buf_large;
1185 /* p->wr_id is already filled in ibw_init_memory */
1187 DEBUG(DEBUG_DEBUG, ("ibw_alloc_send_buf#2: cmid=%p, len=%d\n", pconn->cm_id, len));
1189 p = pconn->extra_avail;
1191 p = pconn->extra_avail = talloc_zero(pconn, struct ibw_wr);
1192 talloc_set_destructor(p, ibw_wr_destruct);
1194 sprintf(ibw_lasterr, "talloc_zero failed (emax: %u)\n", pconn->extra_max);
1197 p->wr_id = pctx->opts.max_send_wr + pconn->extra_max;
1199 switch(pconn->extra_max) {
1200 case 1: DEBUG(DEBUG_INFO, ("warning: queue performed\n")); break;
1201 case 10: DEBUG(DEBUG_INFO, ("warning: queue reached 10\n")); break;
1202 case 100: DEBUG(DEBUG_INFO, ("warning: queue reached 100\n")); break;
1203 case 1000: DEBUG(DEBUG_INFO, ("warning: queue reached 1000\n")); break;
1208 p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large);
1209 if (p->buf_large==NULL) {
1210 sprintf(ibw_lasterr, "ibw_alloc_mr#2 failed\n");
1213 *buf = (void *)p->buf_large;
1215 DLIST_REMOVE(pconn->extra_avail, p);
1216 /* we don't have prepared index for this, so that
1217 * we will have to find this by wr_id later on */
1218 DLIST_ADD(pconn->extra_sent, p);
1225 DEBUG(DEBUG_ERR, ("ibw_alloc_send_buf error: %s", ibw_lasterr));
1230 static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len)
1232 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1233 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1236 /* can we send it right now? */
1237 if (pconn->wr_sent<pctx->opts.max_send_wr) {
1238 struct ibv_send_wr *bad_wr;
1239 struct ibv_sge list = {
1240 .addr = (uintptr_t)buf,
1242 .lkey = pconn->mr_send->lkey
1244 struct ibv_send_wr wr = {
1245 .wr_id = p->wr_id + pctx->opts.max_recv_wr,
1248 .opcode = IBV_WR_SEND,
1249 .send_flags = IBV_SEND_SIGNALED,
1252 if (p->buf_large==NULL) {
1253 DEBUG(DEBUG_DEBUG, ("ibw_send#normal(cmid: %p, wrid: %u, n: %d)\n",
1254 pconn->cm_id, (uint32_t)wr.wr_id, len));
1256 DEBUG(DEBUG_DEBUG, ("ibw_send#large(cmid: %p, wrid: %u, n: %d)\n",
1257 pconn->cm_id, (uint32_t)wr.wr_id, len));
1258 list.lkey = p->mr_large->lkey;
1261 rc = ibv_post_send(pconn->cm_id->qp, &wr, &bad_wr);
1263 sprintf(ibw_lasterr, "ibv_post_send error %d (%d)\n",
1264 rc, pconn->wr_sent);
1271 } /* else put the request into our own queue: */
1273 DEBUG(DEBUG_DEBUG, ("ibw_send#queued(cmid: %p, len: %u)\n", pconn->cm_id, len));
1275 /* TODO: clarify how to continue when state==IBWC_STOPPED */
1277 /* to be sent by ibw_wc_send */
1278 /* regardless "normal" or [a part of] "large" packet */
1279 if (!p->queued_ref_cnt) {
1280 DLIST_ADD_END2(pconn->queue, p, struct ibw_wr *,
1281 qprev, qnext); /* TODO: optimize */
1282 p->queued_msg = buf;
1284 p->queued_ref_cnt++;
1285 p->queued_rlen = len; /* last wins; see ibw_wc_send */
1289 DEBUG(DEBUG_ERR, (ibw_lasterr));
1293 int ibw_send(struct ibw_conn *conn, void *buf, void *key, uint32_t len)
1295 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1296 struct ibw_wr *p = talloc_get_type(key, struct ibw_wr);
1299 assert(len>=sizeof(uint32_t));
1300 assert((*((uint32_t *)buf)==len)); /* TODO: htonl */
1302 if (len > pctx->opts.recv_bufsize) {
1303 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1305 char *packet = (char *)buf;
1306 uint32_t recv_bufsize = pctx->opts.recv_bufsize;
1308 DEBUG(DEBUG_DEBUG, ("ibw_send#frag(cmid: %p, buf: %p, len: %u)\n",
1309 pconn->cm_id, buf, len));
1311 /* single threaded => no race here: */
1312 assert(p->ref_cnt==0);
1313 while(rlen > recv_bufsize) {
1314 rc = ibw_send_packet(conn, packet, p, recv_bufsize);
1317 packet += recv_bufsize;
1318 rlen -= recv_bufsize;
1319 p->ref_cnt++; /* not good to have it in ibw_send_packet */
1322 rc = ibw_send_packet(conn, packet, p, rlen);
1323 p->ref_cnt++; /* not good to have it in ibw_send_packet */
1325 p->ref_cnt--; /* for the same handling */
1327 assert(p->ref_cnt==0);
1328 assert(p->queued_ref_cnt==0);
1330 rc = ibw_send_packet(conn, buf, p, len);
1335 int ibw_cancel_send_buf(struct ibw_conn *conn, void *buf, void *key)
1337 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1338 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1339 struct ibw_wr *p = talloc_get_type(key, struct ibw_wr);
1345 if (p->buf_large!=NULL)
1346 ibw_free_mr(&p->buf_large, &p->mr_large);
1349 if (p->wr_id < pctx->opts.max_send_wr) {
1350 DEBUG(DEBUG_DEBUG, ("ibw_cancel_send_buf#1 %u", (int)p->wr_id));
1351 DLIST_REMOVE(pconn->wr_list_used, p);
1352 DLIST_ADD(pconn->wr_list_avail, p);
1353 } else { /* "extra" packet */
1354 DEBUG(DEBUG_DEBUG, ("ibw_cancel_send_buf#2 %u", (int)p->wr_id));
1355 DLIST_REMOVE(pconn->extra_sent, p);
1356 DLIST_ADD(pconn->extra_avail, p);
1362 const char *ibw_getLastError(void)