1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25 /* Copyright (c) 1990 Mentat Inc. */
26
27 /*
28 * An implementation of the IPoIB-CM standard based on PSARC 2009/593.
29 */
30 #include <sys/types.h>
31 #include <sys/conf.h>
32 #include <sys/ddi.h>
33 #include <sys/sunddi.h>
34 #include <sys/modctl.h>
35 #include <sys/stropts.h>
36 #include <sys/stream.h>
37 #include <sys/strsun.h>
38 #include <sys/strsubr.h>
39 #include <sys/dlpi.h>
40 #include <sys/mac_provider.h>
41
42 #include <sys/pattr.h> /* for HCK_FULLCKSUM */
43 #include <sys/atomic.h> /* for atomic_add*() */
44 #include <sys/ethernet.h> /* for ETHERTYPE_IP */
45 #include <netinet/in.h> /* for netinet/ip.h below */
46 #include <netinet/ip.h> /* for struct ip */
47 #include <inet/common.h> /* for inet/ip.h below */
48 #include <inet/ip.h> /* for ipha_t */
49 #include <inet/ip_if.h> /* for ETHERTYPE_IPV6 */
50 #include <inet/ip6.h> /* for ip6_t */
51 #include <netinet/icmp6.h> /* for icmp6_t */
52
53 #include <sys/ib/clients/ibd/ibd.h>
54
55 extern ibd_global_state_t ibd_gstate;
56 extern int ibd_rc_conn_timeout;
57 uint_t ibd_rc_tx_softintr = 1;
58 /*
59 * If the number of WRs in receive queue of each RC connection less than
60 * IBD_RC_RX_WR_THRESHOLD, we will post more receive WRs into it.
61 */
62 #define IBD_RC_RX_WR_THRESHOLD 0x20
63
64 /*
65 * If the number of free SWQEs (or large Tx buf) is larger than or equal to
66 * IBD_RC_TX_FREE_THRESH, we will call mac_tx_update to notify GLD to continue
67 * transmitting packets.
68 */
69 #define IBD_RC_TX_FREE_THRESH 8
70
71 #define IBD_RC_QPN_TO_SID(qpn) \
72 ((uint64_t)(IBD_RC_SERVICE_ID | ((qpn) & 0xffffff)))
73
74 /* For interop with legacy OFED */
75 #define IBD_RC_QPN_TO_SID_OFED_INTEROP(qpn) \
76 ((uint64_t)(IBD_RC_SERVICE_ID_OFED_INTEROP | ((qpn) & 0xffffff)))
77
78 /* Internet Header + 64 bits of Data Datagram. Refer to RFC 792 */
79 #define IBD_RC_IP_ICMP_RETURN_DATA_BYTES 64
80
81
82 /* Functions for Reliable Connected Mode */
83 /* Connection Setup/Close Functions */
84 static ibt_cm_status_t ibd_rc_dispatch_pass_mad(void *,
85 ibt_cm_event_t *, ibt_cm_return_args_t *, void *, ibt_priv_data_len_t);
86 static ibt_cm_status_t ibd_rc_dispatch_actv_mad(void *,
87 ibt_cm_event_t *, ibt_cm_return_args_t *, void *, ibt_priv_data_len_t);
88 static void ibd_rc_act_close(ibd_rc_chan_t *, boolean_t);
89
90 static inline void ibd_rc_add_to_chan_list(ibd_rc_chan_list_t *,
91 ibd_rc_chan_t *);
92 static inline ibd_rc_chan_t *ibd_rc_rm_header_chan_list(
93 ibd_rc_chan_list_t *);
94 static inline ibd_rc_chan_t *ibd_rc_rm_from_chan_list(ibd_rc_chan_list_t *,
95 ibd_rc_chan_t *);
96
97 /* CQ handlers */
98 static void ibd_rc_rcq_handler(ibt_cq_hdl_t, void *);
99 static void ibd_rc_scq_handler(ibt_cq_hdl_t, void *);
100 static void ibd_rc_poll_rcq(ibd_rc_chan_t *, ibt_cq_hdl_t);
101
102 /* Receive Functions */
103 static int ibd_rc_post_srq(ibd_state_t *, ibd_rwqe_t *);
104 static void ibd_rc_srq_freemsg_cb(char *);
105 static void ibd_rc_srq_free_rwqe(ibd_state_t *, ibd_rwqe_t *);
106
107 static int ibd_rc_post_rwqe(ibd_rc_chan_t *, ibd_rwqe_t *);
108 static void ibd_rc_freemsg_cb(char *);
109 static void ibd_rc_process_rx(ibd_rc_chan_t *, ibd_rwqe_t *, ibt_wc_t *);
110 static void ibd_rc_free_rwqe(ibd_rc_chan_t *, ibd_rwqe_t *);
111 static void ibd_rc_fini_rxlist(ibd_rc_chan_t *);
112
113
114 /* Send Functions */
115 static void ibd_rc_release_swqe(ibd_rc_chan_t *, ibd_swqe_t *);
116 static int ibd_rc_init_txlist(ibd_rc_chan_t *);
117 static void ibd_rc_fini_txlist(ibd_rc_chan_t *);
118 static uint_t ibd_rc_tx_recycle(caddr_t);
119
120
121 void
ibd_async_rc_close_act_chan(ibd_state_t * state,ibd_req_t * req)122 ibd_async_rc_close_act_chan(ibd_state_t *state, ibd_req_t *req)
123 {
124 ibd_rc_chan_t *rc_chan = req->rq_ptr;
125 ibd_ace_t *ace;
126
127 while (rc_chan != NULL) {
128 ace = rc_chan->ace;
129 ASSERT(ace != NULL);
130 /* Close old RC channel */
131 ibd_rc_act_close(rc_chan, B_TRUE);
132 mutex_enter(&state->id_ac_mutex);
133 ASSERT(ace->ac_ref != 0);
134 atomic_dec_32(&ace->ac_ref);
135 ace->ac_chan = NULL;
136 if ((ace->ac_ref == 0) || (ace->ac_ref == CYCLEVAL)) {
137 IBD_ACACHE_INSERT_FREE(state, ace);
138 ace->ac_ref = 0;
139 } else {
140 ace->ac_ref |= CYCLEVAL;
141 state->rc_delay_ace_recycle++;
142 }
143 mutex_exit(&state->id_ac_mutex);
144 rc_chan = ibd_rc_rm_header_chan_list(
145 &state->rc_obs_act_chan_list);
146 }
147 }
148
149 void
ibd_async_rc_recycle_ace(ibd_state_t * state,ibd_req_t * req)150 ibd_async_rc_recycle_ace(ibd_state_t *state, ibd_req_t *req)
151 {
152 ibd_ace_t *ace = req->rq_ptr;
153 ibd_rc_chan_t *rc_chan;
154
155 ASSERT(ace != NULL);
156 rc_chan = ace->ac_chan;
157 ASSERT(rc_chan != NULL);
158 /* Close old RC channel */
159 ibd_rc_act_close(rc_chan, B_TRUE);
160 mutex_enter(&state->id_ac_mutex);
161 ASSERT(ace->ac_ref != 0);
162 atomic_dec_32(&ace->ac_ref);
163 ace->ac_chan = NULL;
164 if ((ace->ac_ref == 0) || (ace->ac_ref == CYCLEVAL)) {
165 IBD_ACACHE_INSERT_FREE(state, ace);
166 ace->ac_ref = 0;
167 } else {
168 ace->ac_ref |= CYCLEVAL;
169 state->rc_delay_ace_recycle++;
170 }
171 mutex_exit(&state->id_ac_mutex);
172 mutex_enter(&state->rc_ace_recycle_lock);
173 state->rc_ace_recycle = NULL;
174 mutex_exit(&state->rc_ace_recycle_lock);
175 }
176
177 /* Simple ICMP IP Header Template */
178 static const ipha_t icmp_ipha = {
179 IP_SIMPLE_HDR_VERSION, 0, 0, 0, 0, 0, IPPROTO_ICMP
180 };
181
182 /* Packet is too big. Send ICMP packet to GLD to request a smaller MTU */
183 void
ibd_async_rc_process_too_big(ibd_state_t * state,ibd_req_t * req)184 ibd_async_rc_process_too_big(ibd_state_t *state, ibd_req_t *req)
185 {
186 mblk_t *mp = req->rq_ptr;
187 ibd_ace_t *ace = req->rq_ptr2;
188 uint16_t mtu = state->id_mtu - IPOIB_HDRSIZE;
189 uint_t len_needed;
190 size_t msg_len;
191 mblk_t *pmtu_mp;
192 ushort_t sap;
193 ib_header_info_t *ibha; /* ib header for pmtu_pkt */
194 /*
195 * ipha: IP header for pmtu_pkt
196 * old_ipha: IP header for old packet
197 */
198 ipha_t *ipha, *old_ipha;
199 icmph_t *icmph;
200
201 sap = ntohs(((ipoib_hdr_t *)mp->b_rptr)->ipoib_type);
202
203 if (!pullupmsg(mp, -1)) {
204 DPRINT(40, "ibd_async_rc_process_too_big: pullupmsg fail");
205 goto too_big_fail;
206 }
207 /* move to IP header. */
208 mp->b_rptr += IPOIB_HDRSIZE;
209 old_ipha = (ipha_t *)mp->b_rptr;
210
211 len_needed = IPH_HDR_LENGTH(old_ipha);
212 if (old_ipha->ipha_protocol == IPPROTO_ENCAP) {
213 len_needed += IPH_HDR_LENGTH(((uchar_t *)old_ipha +
214 len_needed));
215 } else if (old_ipha->ipha_protocol == IPPROTO_IPV6) {
216 ip6_t *ip6h = (ip6_t *)((uchar_t *)old_ipha
217 + len_needed);
218 len_needed += ip_hdr_length_v6(mp, ip6h);
219 }
220 len_needed += IBD_RC_IP_ICMP_RETURN_DATA_BYTES;
221 msg_len = msgdsize(mp);
222 if (msg_len > len_needed) {
223 (void) adjmsg(mp, len_needed - msg_len);
224 msg_len = len_needed;
225 }
226
227 if ((pmtu_mp = allocb(sizeof (ib_header_info_t) + sizeof (ipha_t)
228 + sizeof (icmph_t), BPRI_MED)) == NULL) {
229 DPRINT(40, "ibd_async_rc_process_too_big: allocb fail");
230 goto too_big_fail;
231 }
232 pmtu_mp->b_cont = mp;
233 pmtu_mp->b_wptr = pmtu_mp->b_rptr + sizeof (ib_header_info_t)
234 + sizeof (ipha_t) + sizeof (icmph_t);
235
236 ibha = (ib_header_info_t *)pmtu_mp->b_rptr;
237
238 /* Fill IB header */
239 bcopy(&state->id_macaddr, &ibha->ib_dst, IPOIB_ADDRL);
240 /*
241 * If the GRH is not valid, indicate to GLDv3 by setting
242 * the VerTcFlow field to 0.
243 */
244 ibha->ib_grh.ipoib_vertcflow = 0;
245 ibha->ipib_rhdr.ipoib_type = htons(sap);
246 ibha->ipib_rhdr.ipoib_mbz = 0;
247
248 /* Fill IP header */
249 ipha = (ipha_t *)&ibha[1];
250 *ipha = icmp_ipha;
251 ipha->ipha_src = old_ipha->ipha_dst;
252 ipha->ipha_dst = old_ipha->ipha_src;
253 ipha->ipha_ttl = old_ipha->ipha_ttl;
254 msg_len += sizeof (icmp_ipha) + sizeof (icmph_t);
255 if (msg_len > IP_MAXPACKET) {
256 ibd_print_warn(state, "ibd_rc_process_too_big_pkt: msg_len(%d) "
257 "> IP_MAXPACKET", (uint32_t)msg_len);
258 (void) adjmsg(mp, IP_MAXPACKET - msg_len);
259 msg_len = IP_MAXPACKET;
260 }
261 ipha->ipha_length = htons((uint16_t)msg_len);
262 ipha->ipha_hdr_checksum = 0;
263 ipha->ipha_hdr_checksum = (uint16_t)ip_csum_hdr(ipha);
264
265 /* Fill ICMP body */
266 icmph = (icmph_t *)&ipha[1];
267 bzero(icmph, sizeof (icmph_t));
268 icmph->icmph_type = ICMP_DEST_UNREACHABLE;
269 icmph->icmph_code = ICMP_FRAGMENTATION_NEEDED;
270 icmph->icmph_du_mtu = htons(mtu);
271 icmph->icmph_checksum = 0;
272 icmph->icmph_checksum = IP_CSUM(pmtu_mp,
273 (int32_t)sizeof (ib_header_info_t) + (int32_t)sizeof (ipha_t), 0);
274
275 (void) hcksum_assoc(pmtu_mp, NULL, NULL, 0, 0, 0, 0,
276 HCK_FULLCKSUM | HCK_FULLCKSUM_OK, 0);
277
278 DPRINT(30, "ibd_async_rc_process_too_big: sap=0x%x, ip_src=0x%x, "
279 "ip_dst=0x%x, ttl=%d, len_needed=%d, msg_len=%d",
280 sap, ipha->ipha_src, ipha->ipha_dst, ipha->ipha_ttl,
281 len_needed, (uint32_t)msg_len);
282
283 mac_rx(state->id_mh, state->id_rh, pmtu_mp);
284
285 mutex_enter(&ace->tx_too_big_mutex);
286 ace->tx_too_big_ongoing = B_FALSE;
287 mutex_exit(&ace->tx_too_big_mutex);
288 return;
289
290 too_big_fail:
291 /* Drop packet */
292 freemsg(mp);
293 mutex_enter(&ace->tx_too_big_mutex);
294 ace->tx_too_big_ongoing = B_FALSE;
295 mutex_exit(&ace->tx_too_big_mutex);
296 }
297
298 /*
299 * Check all active/passive channels. If any ative/passive
300 * channel has not been used for a long time, close it.
301 */
302 void
ibd_rc_conn_timeout_call(void * carg)303 ibd_rc_conn_timeout_call(void *carg)
304 {
305 ibd_state_t *state = carg;
306 ibd_ace_t *ace, *pre_ace;
307 ibd_rc_chan_t *chan, *pre_chan, *next_chan;
308 ibd_req_t *req;
309
310 /* Check all active channels. If chan->is_used == B_FALSE, close it */
311 mutex_enter(&state->id_ac_mutex);
312 ace = list_head(&state->id_ah_active);
313 while ((pre_ace = ace) != NULL) {
314 ace = list_next(&state->id_ah_active, ace);
315 if (pre_ace->ac_chan != NULL) {
316 chan = pre_ace->ac_chan;
317 ASSERT(state->id_enable_rc == B_TRUE);
318 if (chan->chan_state == IBD_RC_STATE_ACT_ESTAB) {
319 if (chan->is_used == B_FALSE) {
320 state->rc_timeout_act++;
321 INC_REF(pre_ace, 1);
322 IBD_ACACHE_PULLOUT_ACTIVE(state,
323 pre_ace);
324 chan->chan_state =
325 IBD_RC_STATE_ACT_CLOSING;
326 ibd_rc_signal_act_close(state, pre_ace);
327 } else {
328 chan->is_used = B_FALSE;
329 }
330 }
331 }
332 }
333 mutex_exit(&state->id_ac_mutex);
334
335 /* Check all passive channels. If chan->is_used == B_FALSE, close it */
336 mutex_enter(&state->rc_pass_chan_list.chan_list_mutex);
337 next_chan = state->rc_pass_chan_list.chan_list;
338 pre_chan = NULL;
339 while ((chan = next_chan) != NULL) {
340 next_chan = chan->next;
341 if (chan->is_used == B_FALSE) {
342 req = kmem_cache_alloc(state->id_req_kmc, KM_NOSLEEP);
343 if (req != NULL) {
344 /* remove it */
345 state->rc_timeout_pas++;
346 req->rq_ptr = chan;
347 ibd_queue_work_slot(state, req,
348 IBD_ASYNC_RC_CLOSE_PAS_CHAN);
349 } else {
350 ibd_print_warn(state, "ibd_rc_conn_timeout: "
351 "alloc ibd_req_t fail");
352 if (pre_chan == NULL) {
353 state->rc_pass_chan_list.chan_list =
354 chan;
355 } else {
356 pre_chan->next = chan;
357 }
358 pre_chan = chan;
359 }
360 } else {
361 if (pre_chan == NULL) {
362 state->rc_pass_chan_list.chan_list = chan;
363 } else {
364 pre_chan->next = chan;
365 }
366 pre_chan = chan;
367 chan->is_used = B_FALSE;
368 }
369 }
370 if (pre_chan != NULL) {
371 pre_chan->next = NULL;
372 } else {
373 state->rc_pass_chan_list.chan_list = NULL;
374 }
375 mutex_exit(&state->rc_pass_chan_list.chan_list_mutex);
376
377 mutex_enter(&state->rc_timeout_lock);
378 if (state->rc_timeout_start == B_TRUE) {
379 state->rc_timeout = timeout(ibd_rc_conn_timeout_call, state,
380 SEC_TO_TICK(ibd_rc_conn_timeout));
381 }
382 mutex_exit(&state->rc_timeout_lock);
383 }
384
385 #ifdef DEBUG
386 /*
387 * ibd_rc_update_stats - update driver private kstat counters
388 *
389 * This routine will dump the internal statistics counters for ibd's
390 * Reliable Connected Mode. The current stats dump values will
391 * be sent to the kernel status area.
392 */
393 static int
ibd_rc_update_stats(kstat_t * ksp,int rw)394 ibd_rc_update_stats(kstat_t *ksp, int rw)
395 {
396 ibd_state_t *state;
397 ibd_rc_stat_t *ibd_rc_ksp;
398
399 if (rw == KSTAT_WRITE)
400 return (EACCES);
401
402 state = (ibd_state_t *)ksp->ks_private;
403 ASSERT(state != NULL);
404 ibd_rc_ksp = (ibd_rc_stat_t *)ksp->ks_data;
405
406 ibd_rc_ksp->rc_rcv_trans_byte.value.ul = state->rc_rcv_trans_byte;
407 ibd_rc_ksp->rc_rcv_trans_pkt.value.ul = state->rc_rcv_trans_pkt;
408 ibd_rc_ksp->rc_rcv_copy_byte.value.ul = state->rc_rcv_copy_byte;
409 ibd_rc_ksp->rc_rcv_copy_pkt.value.ul = state->rc_rcv_copy_pkt;
410 ibd_rc_ksp->rc_rcv_alloc_fail.value.ul = state->rc_rcv_alloc_fail;
411
412 ibd_rc_ksp->rc_rcq_err.value.ul = state->rc_rcq_err;
413
414 ibd_rc_ksp->rc_rwqe_short.value.ul = state->rc_rwqe_short;
415
416 ibd_rc_ksp->rc_xmt_bytes.value.ul = state->rc_xmt_bytes;
417 ibd_rc_ksp->rc_xmt_small_pkt.value.ul = state->rc_xmt_small_pkt;
418 ibd_rc_ksp->rc_xmt_fragmented_pkt.value.ul =
419 state->rc_xmt_fragmented_pkt;
420 ibd_rc_ksp->rc_xmt_map_fail_pkt.value.ul = state->rc_xmt_map_fail_pkt;
421 ibd_rc_ksp->rc_xmt_map_succ_pkt.value.ul = state->rc_xmt_map_succ_pkt;
422 ibd_rc_ksp->rc_ace_not_found.value.ul = state->rc_ace_not_found;
423
424 ibd_rc_ksp->rc_scq_no_swqe.value.ul = state->rc_scq_no_swqe;
425 ibd_rc_ksp->rc_scq_no_largebuf.value.ul = state->rc_scq_no_largebuf;
426 ibd_rc_ksp->rc_swqe_short.value.ul = state->rc_swqe_short;
427 ibd_rc_ksp->rc_swqe_mac_update.value.ul = state->rc_swqe_mac_update;
428 ibd_rc_ksp->rc_xmt_buf_short.value.ul = state->rc_xmt_buf_short;
429 ibd_rc_ksp->rc_xmt_buf_mac_update.value.ul =
430 state->rc_xmt_buf_mac_update;
431
432 ibd_rc_ksp->rc_conn_succ.value.ul = state->rc_conn_succ;
433 ibd_rc_ksp->rc_conn_fail.value.ul = state->rc_conn_fail;
434 ibd_rc_ksp->rc_null_conn.value.ul = state->rc_null_conn;
435 ibd_rc_ksp->rc_no_estab_conn.value.ul = state->rc_no_estab_conn;
436
437 ibd_rc_ksp->rc_act_close.value.ul = state->rc_act_close;
438 ibd_rc_ksp->rc_pas_close.value.ul = state->rc_pas_close;
439 ibd_rc_ksp->rc_delay_ace_recycle.value.ul = state->rc_delay_ace_recycle;
440 ibd_rc_ksp->rc_act_close_simultaneous.value.ul =
441 state->rc_act_close_simultaneous;
442 ibd_rc_ksp->rc_reset_cnt.value.ul = state->rc_reset_cnt;
443 ibd_rc_ksp->rc_timeout_act.value.ul = state->rc_timeout_act;
444 ibd_rc_ksp->rc_timeout_pas.value.ul = state->rc_timeout_pas;
445
446 return (0);
447 }
448
449
450 /*
451 * ibd_rc_init_stats - initialize kstat data structures
452 *
453 * This routine will create and initialize the driver private
454 * statistics counters.
455 */
456 int
ibd_rc_init_stats(ibd_state_t * state)457 ibd_rc_init_stats(ibd_state_t *state)
458 {
459 kstat_t *ksp;
460 ibd_rc_stat_t *ibd_rc_ksp;
461 char stat_name[KSTAT_STRLEN];
462 int inst;
463
464 /*
465 * Create and init kstat
466 */
467 inst = ddi_get_instance(state->id_dip);
468 (void) snprintf(stat_name, KSTAT_STRLEN, "statistics%d_%x_%u", inst,
469 state->id_pkey, state->id_plinkid);
470 ksp = kstat_create("ibd", 0, stat_name, "net", KSTAT_TYPE_NAMED,
471 sizeof (ibd_rc_stat_t) / sizeof (kstat_named_t), 0);
472
473 if (ksp == NULL) {
474 ibd_print_warn(state, "ibd_rc_init_stats: Could not create "
475 "kernel statistics");
476 return (DDI_FAILURE);
477 }
478
479 state->rc_ksp = ksp; /* Fill in the ksp of ibd over RC mode */
480
481 ibd_rc_ksp = (ibd_rc_stat_t *)ksp->ks_data;
482
483 /*
484 * Initialize all the statistics
485 */
486 kstat_named_init(&ibd_rc_ksp->rc_rcv_trans_byte, "RC: Rx Bytes, "
487 "transfer mode", KSTAT_DATA_ULONG);
488 kstat_named_init(&ibd_rc_ksp->rc_rcv_trans_pkt, "RC: Rx Pkts, "
489 "transfer mode", KSTAT_DATA_ULONG);
490 kstat_named_init(&ibd_rc_ksp->rc_rcv_copy_byte, "RC: Rx Bytes, "
491 "copy mode", KSTAT_DATA_ULONG);
492 kstat_named_init(&ibd_rc_ksp->rc_rcv_copy_pkt, "RC: Rx Pkts, "
493 "copy mode", KSTAT_DATA_ULONG);
494 kstat_named_init(&ibd_rc_ksp->rc_rcv_alloc_fail, "RC: Rx alloc fail",
495 KSTAT_DATA_ULONG);
496
497 kstat_named_init(&ibd_rc_ksp->rc_rcq_err, "RC: fail in Recv CQ handler",
498 KSTAT_DATA_ULONG);
499
500 kstat_named_init(&ibd_rc_ksp->rc_rwqe_short, "RC: Short rwqe",
501 KSTAT_DATA_ULONG);
502
503 kstat_named_init(&ibd_rc_ksp->rc_xmt_bytes, "RC: Sent Bytes",
504 KSTAT_DATA_ULONG);
505 kstat_named_init(&ibd_rc_ksp->rc_xmt_small_pkt,
506 "RC: Tx pkt small size", KSTAT_DATA_ULONG);
507 kstat_named_init(&ibd_rc_ksp->rc_xmt_fragmented_pkt,
508 "RC: Tx pkt fragmentary", KSTAT_DATA_ULONG);
509 kstat_named_init(&ibd_rc_ksp->rc_xmt_map_fail_pkt,
510 "RC: Tx pkt fail ibt_map_mem_iov()", KSTAT_DATA_ULONG);
511 kstat_named_init(&ibd_rc_ksp->rc_xmt_map_succ_pkt,
512 "RC: Tx pkt succ ibt_map_mem_iov()", KSTAT_DATA_ULONG);
513 kstat_named_init(&ibd_rc_ksp->rc_ace_not_found, "RC: ace not found",
514 KSTAT_DATA_ULONG);
515
516 kstat_named_init(&ibd_rc_ksp->rc_scq_no_swqe, "RC: No swqe after "
517 "recycle", KSTAT_DATA_ULONG);
518 kstat_named_init(&ibd_rc_ksp->rc_scq_no_largebuf, "RC: No large tx buf "
519 "after recycle", KSTAT_DATA_ULONG);
520 kstat_named_init(&ibd_rc_ksp->rc_swqe_short, "RC: No swqe in ibd_send",
521 KSTAT_DATA_ULONG);
522 kstat_named_init(&ibd_rc_ksp->rc_swqe_mac_update, "RC: mac_tx_update "
523 "#, swqe available", KSTAT_DATA_ULONG);
524 kstat_named_init(&ibd_rc_ksp->rc_xmt_buf_short, "RC: No buf in "
525 "ibd_send", KSTAT_DATA_ULONG);
526 kstat_named_init(&ibd_rc_ksp->rc_xmt_buf_mac_update, "RC: "
527 "mac_tx_update #, buf available", KSTAT_DATA_ULONG);
528
529 kstat_named_init(&ibd_rc_ksp->rc_conn_succ, "RC: succ connected",
530 KSTAT_DATA_ULONG);
531 kstat_named_init(&ibd_rc_ksp->rc_conn_fail, "RC: fail connect",
532 KSTAT_DATA_ULONG);
533 kstat_named_init(&ibd_rc_ksp->rc_null_conn, "RC: null conn for unicast "
534 "pkt", KSTAT_DATA_ULONG);
535 kstat_named_init(&ibd_rc_ksp->rc_no_estab_conn, "RC: not in act estab "
536 "state", KSTAT_DATA_ULONG);
537
538 kstat_named_init(&ibd_rc_ksp->rc_act_close, "RC: call ibd_rc_act_close",
539 KSTAT_DATA_ULONG);
540 kstat_named_init(&ibd_rc_ksp->rc_pas_close, "RC: call ibd_rc_pas_close",
541 KSTAT_DATA_ULONG);
542 kstat_named_init(&ibd_rc_ksp->rc_delay_ace_recycle, "RC: delay ace "
543 "recycle", KSTAT_DATA_ULONG);
544 kstat_named_init(&ibd_rc_ksp->rc_act_close_simultaneous, "RC: "
545 "simultaneous ibd_rc_act_close", KSTAT_DATA_ULONG);
546 kstat_named_init(&ibd_rc_ksp->rc_reset_cnt, "RC: Reset RC channel",
547 KSTAT_DATA_ULONG);
548 kstat_named_init(&ibd_rc_ksp->rc_act_close, "RC: timeout act side",
549 KSTAT_DATA_ULONG);
550 kstat_named_init(&ibd_rc_ksp->rc_pas_close, "RC: timeout pas side",
551 KSTAT_DATA_ULONG);
552
553 /*
554 * Function to provide kernel stat update on demand
555 */
556 ksp->ks_update = ibd_rc_update_stats;
557
558 /*
559 * Pointer into provider's raw statistics
560 */
561 ksp->ks_private = (void *)state;
562
563 /*
564 * Add kstat to systems kstat chain
565 */
566 kstat_install(ksp);
567
568 return (DDI_SUCCESS);
569 }
570 #endif
571
572 static ibt_status_t
ibd_rc_alloc_chan(ibd_rc_chan_t ** ret_chan,ibd_state_t * state,boolean_t is_tx_chan)573 ibd_rc_alloc_chan(ibd_rc_chan_t **ret_chan, ibd_state_t *state,
574 boolean_t is_tx_chan)
575 {
576 ibt_status_t result;
577 ibd_rc_chan_t *chan;
578 ibt_rc_chan_alloc_args_t alloc_args;
579 ibt_chan_alloc_flags_t alloc_flags;
580 ibt_chan_sizes_t sizes;
581 ibt_cq_attr_t cq_atts;
582 int rv;
583
584 chan = kmem_zalloc(sizeof (ibd_rc_chan_t), KM_SLEEP);
585
586 chan->state = state;
587 mutex_init(&chan->rx_wqe_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
588 mutex_init(&chan->rx_free_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
589 mutex_init(&chan->tx_wqe_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
590 mutex_init(&chan->tx_rel_list.dl_mutex, NULL, MUTEX_DRIVER, NULL);
591 mutex_init(&chan->tx_post_lock, NULL, MUTEX_DRIVER, NULL);
592 mutex_init(&chan->tx_poll_lock, NULL, MUTEX_DRIVER, NULL);
593
594 /* Allocate IB structures for a new RC channel. */
595 if (is_tx_chan) {
596 chan->scq_size = state->id_rc_num_swqe;
597 chan->rcq_size = IBD_RC_MIN_CQ_SIZE;
598 } else {
599 chan->scq_size = IBD_RC_MIN_CQ_SIZE;
600 chan->rcq_size = state->id_rc_num_rwqe;
601 }
602 cq_atts.cq_size = chan->scq_size;
603 cq_atts.cq_sched = NULL;
604 cq_atts.cq_flags = IBT_CQ_NO_FLAGS;
605 result = ibt_alloc_cq(state->id_hca_hdl, &cq_atts, &chan->scq_hdl,
606 &chan->scq_size);
607 if (result != IBT_SUCCESS) {
608 DPRINT(40, "ibd_rc_alloc_chan: error <%d>"
609 "create scq completion queue (size <%d>)",
610 result, chan->scq_size);
611 goto alloc_scq_err;
612 } /* if failure to alloc cq */
613
614 if (ibt_modify_cq(chan->scq_hdl, state->id_rc_tx_comp_count,
615 state->id_rc_tx_comp_usec, 0) != IBT_SUCCESS) {
616 DPRINT(30, "ibd_rc_alloc_chan: Send CQ "
617 "interrupt moderation failed");
618 }
619
620 ibt_set_cq_private(chan->scq_hdl, (void *) (uintptr_t)chan);
621 ibt_set_cq_handler(chan->scq_hdl, ibd_rc_scq_handler,
622 (void *) (uintptr_t)chan);
623
624 cq_atts.cq_size = chan->rcq_size;
625 cq_atts.cq_sched = NULL;
626 cq_atts.cq_flags = IBT_CQ_NO_FLAGS;
627 result = ibt_alloc_cq(state->id_hca_hdl, &cq_atts, &chan->rcq_hdl,
628 &chan->rcq_size);
629 if (result != IBT_SUCCESS) {
630 ibd_print_warn(state, "ibd_rc_alloc_chan: error <%d> creating "
631 "rx completion queue (size <%d>)", result, chan->rcq_size);
632 goto alloc_rcq_err;
633 } /* if failure to alloc cq */
634
635 if (ibt_modify_cq(chan->rcq_hdl, state->id_rc_rx_comp_count,
636 state->id_rc_rx_comp_usec, 0) != IBT_SUCCESS) {
637 DPRINT(30, "ibd_rc_alloc_chan: Receive CQ "
638 "interrupt moderation failed");
639 }
640
641 ibt_set_cq_private(chan->rcq_hdl, (void *) (uintptr_t)chan);
642 ibt_set_cq_handler(chan->rcq_hdl, ibd_rc_rcq_handler,
643 (void *)(uintptr_t)chan);
644
645 if (is_tx_chan) {
646 chan->is_tx_chan = B_TRUE;
647 if (ibd_rc_init_txlist(chan) != DDI_SUCCESS) {
648 ibd_print_warn(state, "ibd_rc_alloc_chan: "
649 "ibd_rc_init_txlist failed");
650 goto init_txlist_err;
651 }
652 if (ibd_rc_tx_softintr == 1) {
653 if ((rv = ddi_add_softintr(state->id_dip,
654 DDI_SOFTINT_LOW, &chan->scq_softintr, NULL, NULL,
655 ibd_rc_tx_recycle, (caddr_t)chan)) !=
656 DDI_SUCCESS) {
657 DPRINT(10, "ibd_rc_alloc_chan: failed in "
658 "ddi_add_softintr(scq_softintr), ret=%d",
659 rv);
660 goto alloc_softintr_err;
661 }
662 }
663 } else {
664 chan->is_tx_chan = B_FALSE;
665 }
666
667 /*
668 * enable completions
669 */
670 result = ibt_enable_cq_notify(chan->scq_hdl, IBT_NEXT_COMPLETION);
671 if (result != IBT_SUCCESS) {
672 ibd_print_warn(state, "ibd_rc_alloc_chan: ibt_enable_cq_notify"
673 "(scq) failed: status %d\n", result);
674 goto alloc_scq_enable_err;
675 }
676
677 /* We will enable chan->rcq_hdl later. */
678
679 /* alloc a RC channel */
680 bzero(&alloc_args, sizeof (ibt_rc_chan_alloc_args_t));
681 bzero(&sizes, sizeof (ibt_chan_sizes_t));
682
683 alloc_args.rc_flags = IBT_WR_SIGNALED;
684 alloc_args.rc_control = IBT_CEP_NO_FLAGS;
685
686 alloc_args.rc_scq = chan->scq_hdl;
687 alloc_args.rc_rcq = chan->rcq_hdl;
688 alloc_args.rc_pd = state->id_pd_hdl;
689
690 alloc_args.rc_hca_port_num = state->id_port;
691 alloc_args.rc_clone_chan = NULL;
692
693 /* scatter/gather */
694 alloc_args.rc_sizes.cs_sq_sgl = state->rc_tx_max_sqseg;
695
696 /*
697 * For the number of SGL elements in receive side, I think it
698 * should be 1. Because ibd driver allocates a whole block memory
699 * for each ibt_post_recv().
700 */
701 alloc_args.rc_sizes.cs_rq_sgl = 1;
702
703 /* The send queue size and the receive queue size */
704 alloc_args.rc_sizes.cs_sq = chan->scq_size;
705 alloc_args.rc_sizes.cs_rq = chan->rcq_size;
706
707 if (state->id_hca_res_lkey_capab) {
708 alloc_args.rc_flags = IBT_FAST_REG_RES_LKEY;
709 } else {
710 DPRINT(40, "ibd_rc_alloc_chan: not support reserved lkey");
711 }
712
713 if (state->rc_enable_srq) {
714 alloc_flags = IBT_ACHAN_USES_SRQ;
715 alloc_args.rc_srq = state->rc_srq_hdl;
716 } else {
717 alloc_flags = IBT_ACHAN_NO_FLAGS;
718 }
719
720 result = ibt_alloc_rc_channel(state->id_hca_hdl,
721 alloc_flags, &alloc_args, &chan->chan_hdl, &sizes);
722 if (result != IBT_SUCCESS) {
723 ibd_print_warn(state, "ibd_rc_alloc_chan: ibd_rc_open_channel"
724 " fail:<%d>", result);
725 goto alloc_scq_enable_err;
726 }
727
728 if (is_tx_chan)
729 atomic_inc_32(&state->rc_num_tx_chan);
730 else
731 atomic_inc_32(&state->rc_num_rx_chan);
732
733 /* For the connection reaper routine ibd_rc_conn_timeout_call() */
734 chan->is_used = B_TRUE;
735
736 *ret_chan = chan;
737 return (IBT_SUCCESS);
738
739 alloc_scq_enable_err:
740 if (is_tx_chan) {
741 if (ibd_rc_tx_softintr == 1) {
742 ddi_remove_softintr(chan->scq_softintr);
743 }
744 }
745 alloc_softintr_err:
746 if (is_tx_chan) {
747 ibd_rc_fini_txlist(chan);
748 }
749 init_txlist_err:
750 (void) ibt_free_cq(chan->rcq_hdl);
751 alloc_rcq_err:
752 (void) ibt_free_cq(chan->scq_hdl);
753 alloc_scq_err:
754 mutex_destroy(&chan->tx_poll_lock);
755 mutex_destroy(&chan->tx_post_lock);
756 mutex_destroy(&chan->tx_rel_list.dl_mutex);
757 mutex_destroy(&chan->tx_wqe_list.dl_mutex);
758 mutex_destroy(&chan->rx_free_list.dl_mutex);
759 mutex_destroy(&chan->rx_wqe_list.dl_mutex);
760 kmem_free(chan, sizeof (ibd_rc_chan_t));
761 return (result);
762 }
763
764 static void
ibd_rc_free_chan(ibd_rc_chan_t * chan)765 ibd_rc_free_chan(ibd_rc_chan_t *chan)
766 {
767 ibt_status_t ret;
768
769 /* DPRINT(30, "ibd_rc_free_chan: chan=%p", chan); */
770
771 if (chan->chan_hdl != NULL) {
772 ret = ibt_free_channel(chan->chan_hdl);
773 if (ret != IBT_SUCCESS) {
774 DPRINT(40, "ib_rc_free_chan: ibt_free_channel failed, "
775 "chan=%p, returned: %d", chan, ret);
776 return;
777 }
778 chan->chan_hdl = NULL;
779 }
780
781 if (chan->rcq_hdl != NULL) {
782 ret = ibt_free_cq(chan->rcq_hdl);
783 if (ret != IBT_SUCCESS) {
784 DPRINT(40, "ib_rc_free_chan: ibt_free_cq(rcq) failed, "
785 "chan=%p, returned: %d", chan, ret);
786 return;
787 }
788 chan->rcq_hdl = NULL;
789 }
790
791 if (chan->scq_hdl != NULL) {
792 ret = ibt_free_cq(chan->scq_hdl);
793 if (ret != IBT_SUCCESS) {
794 DPRINT(40, "ib_rc_free_chan: ibt_free_cq(scq) failed, "
795 "chan=%p, returned: %d", chan, ret);
796 return;
797 }
798 chan->scq_hdl = NULL;
799 }
800
801 /* Free buffers */
802 if (chan->is_tx_chan) {
803 ibd_rc_fini_txlist(chan);
804 if (ibd_rc_tx_softintr == 1) {
805 ddi_remove_softintr(chan->scq_softintr);
806 }
807 atomic_dec_32(&chan->state->rc_num_tx_chan);
808 } else {
809 if (!chan->state->rc_enable_srq) {
810 ibd_rc_fini_rxlist(chan);
811 }
812 atomic_dec_32(&chan->state->rc_num_rx_chan);
813 }
814
815 mutex_destroy(&chan->tx_poll_lock);
816 mutex_destroy(&chan->tx_post_lock);
817 mutex_destroy(&chan->tx_rel_list.dl_mutex);
818 mutex_destroy(&chan->tx_wqe_list.dl_mutex);
819 mutex_destroy(&chan->rx_free_list.dl_mutex);
820 mutex_destroy(&chan->rx_wqe_list.dl_mutex);
821
822 /*
823 * If it is a passive channel, must make sure it has been removed
824 * from chan->state->rc_pass_chan_list
825 */
826 kmem_free(chan, sizeof (ibd_rc_chan_t));
827 }
828
829 /* Add a RC channel */
830 static inline void
ibd_rc_add_to_chan_list(ibd_rc_chan_list_t * list,ibd_rc_chan_t * chan)831 ibd_rc_add_to_chan_list(ibd_rc_chan_list_t *list, ibd_rc_chan_t *chan)
832 {
833 mutex_enter(&list->chan_list_mutex);
834 if (list->chan_list == NULL) {
835 list->chan_list = chan;
836 chan->next = NULL;
837 } else {
838 chan->next = list->chan_list;
839 list->chan_list = chan;
840 }
841 mutex_exit(&list->chan_list_mutex);
842 }
843
844 static boolean_t
ibd_rc_re_add_to_pas_chan_list(ibd_rc_chan_t * chan)845 ibd_rc_re_add_to_pas_chan_list(ibd_rc_chan_t *chan)
846 {
847 ibd_state_t *state = chan->state;
848
849 mutex_enter(&state->rc_pass_chan_list.chan_list_mutex);
850 if ((state->id_mac_state & IBD_DRV_STARTED) == 0) {
851 mutex_exit(&state->rc_pass_chan_list.chan_list_mutex);
852 return (B_FALSE);
853 } else {
854 if (state->rc_pass_chan_list.chan_list == NULL) {
855 state->rc_pass_chan_list.chan_list = chan;
856 chan->next = NULL;
857 } else {
858 chan->next = state->rc_pass_chan_list.chan_list;
859 state->rc_pass_chan_list.chan_list = chan;
860 }
861 mutex_exit(&state->rc_pass_chan_list.chan_list_mutex);
862 return (B_TRUE);
863 }
864 }
865
866 /* Remove a RC channel */
867 static inline ibd_rc_chan_t *
ibd_rc_rm_from_chan_list(ibd_rc_chan_list_t * list,ibd_rc_chan_t * chan)868 ibd_rc_rm_from_chan_list(ibd_rc_chan_list_t *list, ibd_rc_chan_t *chan)
869 {
870 ibd_rc_chan_t *pre_chan;
871
872 mutex_enter(&list->chan_list_mutex);
873 if (list->chan_list == chan) {
874 DPRINT(30, "ibd_rc_rm_from_chan_list(first): found chan(%p)"
875 " in chan_list", chan);
876 list->chan_list = chan->next;
877 } else {
878 pre_chan = list->chan_list;
879 while (pre_chan != NULL) {
880 if (pre_chan->next == chan) {
881 DPRINT(30, "ibd_rc_rm_from_chan_list"
882 "(middle): found chan(%p)", chan);
883 pre_chan->next = chan->next;
884 break;
885 }
886 pre_chan = pre_chan->next;
887 }
888 if (pre_chan == NULL)
889 chan = NULL;
890 }
891 mutex_exit(&list->chan_list_mutex);
892 return (chan);
893 }
894
895 static inline ibd_rc_chan_t *
ibd_rc_rm_header_chan_list(ibd_rc_chan_list_t * list)896 ibd_rc_rm_header_chan_list(ibd_rc_chan_list_t *list)
897 {
898 ibd_rc_chan_t *rc_chan;
899
900 mutex_enter(&list->chan_list_mutex);
901 rc_chan = list->chan_list;
902 if (rc_chan != NULL) {
903 list->chan_list = rc_chan->next;
904 }
905 mutex_exit(&list->chan_list_mutex);
906 return (rc_chan);
907 }
908
909 static int
ibd_rc_alloc_srq_copybufs(ibd_state_t * state)910 ibd_rc_alloc_srq_copybufs(ibd_state_t *state)
911 {
912 ibt_mr_attr_t mem_attr;
913 uint_t rc_rx_bufs_sz;
914
915 /*
916 * Allocate one big chunk for all regular rx copy bufs
917 */
918 rc_rx_bufs_sz = (state->rc_mtu + IPOIB_GRH_SIZE) * state->rc_srq_size;
919
920 state->rc_srq_rx_bufs = kmem_zalloc(rc_rx_bufs_sz, KM_SLEEP);
921
922 state->rc_srq_rwqes = kmem_zalloc(state->rc_srq_size *
923 sizeof (ibd_rwqe_t), KM_SLEEP);
924
925 /*
926 * Do one memory registration on the entire rxbuf area
927 */
928 mem_attr.mr_vaddr = (uint64_t)(uintptr_t)state->rc_srq_rx_bufs;
929 mem_attr.mr_len = rc_rx_bufs_sz;
930 mem_attr.mr_as = NULL;
931 mem_attr.mr_flags = IBT_MR_SLEEP | IBT_MR_ENABLE_LOCAL_WRITE;
932 if (ibt_register_mr(state->id_hca_hdl, state->id_pd_hdl, &mem_attr,
933 &state->rc_srq_rx_mr_hdl, &state->rc_srq_rx_mr_desc)
934 != IBT_SUCCESS) {
935 DPRINT(40, "ibd_rc_alloc_srq_copybufs: ibt_register_mr() "
936 "failed");
937 kmem_free(state->rc_srq_rwqes,
938 state->rc_srq_size * sizeof (ibd_rwqe_t));
939 kmem_free(state->rc_srq_rx_bufs, rc_rx_bufs_sz);
940 state->rc_srq_rx_bufs = NULL;
941 state->rc_srq_rwqes = NULL;
942 return (DDI_FAILURE);
943 }
944
945 return (DDI_SUCCESS);
946 }
947
948 static void
ibd_rc_free_srq_copybufs(ibd_state_t * state)949 ibd_rc_free_srq_copybufs(ibd_state_t *state)
950 {
951 uint_t rc_rx_buf_sz;
952
953 /*
954 * Don't change the value of state->rc_mtu at the period from call
955 * ibd_rc_alloc_srq_copybufs() to call ibd_rc_free_srq_copybufs().
956 */
957 rc_rx_buf_sz = state->rc_mtu + IPOIB_GRH_SIZE;
958
959 /*
960 * Unregister rxbuf mr
961 */
962 if (ibt_deregister_mr(state->id_hca_hdl,
963 state->rc_srq_rx_mr_hdl) != IBT_SUCCESS) {
964 DPRINT(40, "ibd_rc_free_srq_copybufs: ibt_deregister_mr()"
965 " failed");
966 }
967 state->rc_srq_rx_mr_hdl = NULL;
968
969 /*
970 * Free rxbuf memory
971 */
972 kmem_free(state->rc_srq_rwqes,
973 state->rc_srq_size * sizeof (ibd_rwqe_t));
974 kmem_free(state->rc_srq_rx_bufs, state->rc_srq_size * rc_rx_buf_sz);
975 state->rc_srq_rwqes = NULL;
976 state->rc_srq_rx_bufs = NULL;
977 }
978
979 /*
980 * Allocate and post a certain number of SRQ receive buffers and WRs.
981 */
982 int
ibd_rc_init_srq_list(ibd_state_t * state)983 ibd_rc_init_srq_list(ibd_state_t *state)
984 {
985 ibd_rwqe_t *rwqe;
986 ibt_lkey_t lkey;
987 int i;
988 uint_t len;
989 uint8_t *bufaddr;
990 ibt_srq_sizes_t srq_sizes;
991 ibt_srq_sizes_t srq_real_sizes;
992 ibt_status_t ret;
993
994 srq_sizes.srq_sgl_sz = 1;
995 srq_sizes.srq_wr_sz = state->id_rc_num_srq;
996 ret = ibt_alloc_srq(state->id_hca_hdl, IBT_SRQ_NO_FLAGS,
997 state->id_pd_hdl, &srq_sizes, &state->rc_srq_hdl, &srq_real_sizes);
998 if (ret != IBT_SUCCESS) {
999 /*
1000 * The following code is for CR 6932460 (can't configure ibd
1001 * interface on 32 bits x86 systems). 32 bits x86 system has
1002 * less memory resource than 64 bits x86 system. If current
1003 * resource request can't be satisfied, we request less
1004 * resource here.
1005 */
1006 len = state->id_rc_num_srq;
1007 while ((ret == IBT_HCA_WR_EXCEEDED) &&
1008 (len >= 2 * IBD_RC_MIN_CQ_SIZE)) {
1009 len = len/2;
1010 srq_sizes.srq_sgl_sz = 1;
1011 srq_sizes.srq_wr_sz = len;
1012 ret = ibt_alloc_srq(state->id_hca_hdl,
1013 IBT_SRQ_NO_FLAGS, state->id_pd_hdl, &srq_sizes,
1014 &state->rc_srq_hdl, &srq_real_sizes);
1015 }
1016 if (ret != IBT_SUCCESS) {
1017 DPRINT(10, "ibd_rc_init_srq_list: ibt_alloc_srq failed."
1018 "req_sgl_sz=%d, req_wr_sz=0x%x, final_req_wr_sz="
1019 "0x%x, ret=%d", srq_sizes.srq_sgl_sz,
1020 srq_sizes.srq_wr_sz, len, ret);
1021 return (DDI_FAILURE);
1022 }
1023 state->id_rc_num_srq = len;
1024 state->id_rc_num_rwqe = state->id_rc_num_srq + 1;
1025 }
1026
1027 state->rc_srq_size = srq_real_sizes.srq_wr_sz;
1028 if (ibd_rc_alloc_srq_copybufs(state) != DDI_SUCCESS) {
1029 ret = ibt_free_srq(state->rc_srq_hdl);
1030 if (ret != IBT_SUCCESS) {
1031 ibd_print_warn(state, "ibd_rc_init_srq_list: "
1032 "ibt_free_srq fail, ret=%d", ret);
1033 }
1034 return (DDI_FAILURE);
1035 }
1036
1037 /*
1038 * Allocate and setup the rwqe list
1039 */
1040 lkey = state->rc_srq_rx_mr_desc.md_lkey;
1041 rwqe = state->rc_srq_rwqes;
1042 bufaddr = state->rc_srq_rx_bufs;
1043 len = state->rc_mtu + IPOIB_GRH_SIZE;
1044 state->rc_srq_rwqe_list.dl_cnt = 0;
1045 state->rc_srq_rwqe_list.dl_bufs_outstanding = 0;
1046 for (i = 0; i < state->rc_srq_size; i++, rwqe++, bufaddr += len) {
1047 rwqe->w_state = state;
1048 rwqe->w_freeing_wqe = B_FALSE;
1049 rwqe->w_freemsg_cb.free_func = ibd_rc_srq_freemsg_cb;
1050 rwqe->w_freemsg_cb.free_arg = (char *)rwqe;
1051 rwqe->rwqe_copybuf.ic_bufaddr = bufaddr;
1052
1053 if ((rwqe->rwqe_im_mblk = desballoc(bufaddr, len, 0,
1054 &rwqe->w_freemsg_cb)) == NULL) {
1055 DPRINT(40, "ibd_rc_init_srq_list : desballoc() failed");
1056 rwqe->rwqe_copybuf.ic_bufaddr = NULL;
1057 if (atomic_dec_32_nv(&state->id_running) != 0) {
1058 cmn_err(CE_WARN, "ibd_rc_init_srq_list: "
1059 "id_running was not 1\n");
1060 }
1061 ibd_rc_fini_srq_list(state);
1062 atomic_inc_32(&state->id_running);
1063 return (DDI_FAILURE);
1064 }
1065
1066 rwqe->rwqe_copybuf.ic_sgl.ds_key = lkey;
1067 /* Leave IPOIB_GRH_SIZE space */
1068 rwqe->rwqe_copybuf.ic_sgl.ds_va =
1069 (ib_vaddr_t)(uintptr_t)(bufaddr + IPOIB_GRH_SIZE);
1070 rwqe->rwqe_copybuf.ic_sgl.ds_len = state->rc_mtu;
1071 rwqe->w_rwr.wr_id = (ibt_wrid_t)(uintptr_t)rwqe;
1072 rwqe->w_rwr.wr_nds = 1;
1073 rwqe->w_rwr.wr_sgl = &rwqe->rwqe_copybuf.ic_sgl;
1074 (void) ibd_rc_post_srq(state, rwqe);
1075 }
1076
1077 mutex_enter(&state->rc_srq_free_list.dl_mutex);
1078 state->rc_srq_free_list.dl_head = NULL;
1079 state->rc_srq_free_list.dl_cnt = 0;
1080 mutex_exit(&state->rc_srq_free_list.dl_mutex);
1081
1082 return (DDI_SUCCESS);
1083 }
1084
1085 /*
1086 * Free the statically allocated Rx buffer list for SRQ.
1087 */
1088 void
ibd_rc_fini_srq_list(ibd_state_t * state)1089 ibd_rc_fini_srq_list(ibd_state_t *state)
1090 {
1091 ibd_rwqe_t *rwqe;
1092 int i;
1093 ibt_status_t ret;
1094
1095 ASSERT(state->id_running == 0);
1096 ret = ibt_free_srq(state->rc_srq_hdl);
1097 if (ret != IBT_SUCCESS) {
1098 ibd_print_warn(state, "ibd_rc_fini_srq_list: "
1099 "ibt_free_srq fail, ret=%d", ret);
1100 }
1101
1102 mutex_enter(&state->rc_srq_rwqe_list.dl_mutex);
1103 rwqe = state->rc_srq_rwqes;
1104 for (i = 0; i < state->rc_srq_size; i++, rwqe++) {
1105 if (rwqe->rwqe_im_mblk != NULL) {
1106 rwqe->w_freeing_wqe = B_TRUE;
1107 freemsg(rwqe->rwqe_im_mblk);
1108 }
1109 }
1110 mutex_exit(&state->rc_srq_rwqe_list.dl_mutex);
1111
1112 ibd_rc_free_srq_copybufs(state);
1113 }
1114
1115 /* Repost the elements in state->ib_rc_free_list */
1116 int
ibd_rc_repost_srq_free_list(ibd_state_t * state)1117 ibd_rc_repost_srq_free_list(ibd_state_t *state)
1118 {
1119 ibd_rwqe_t *rwqe;
1120 ibd_wqe_t *list;
1121 uint_t len;
1122
1123 mutex_enter(&state->rc_srq_free_list.dl_mutex);
1124 if (state->rc_srq_free_list.dl_head != NULL) {
1125 /* repost them */
1126 len = state->rc_mtu + IPOIB_GRH_SIZE;
1127 list = state->rc_srq_free_list.dl_head;
1128 state->rc_srq_free_list.dl_head = NULL;
1129 state->rc_srq_free_list.dl_cnt = 0;
1130 mutex_exit(&state->rc_srq_free_list.dl_mutex);
1131 while (list != NULL) {
1132 rwqe = WQE_TO_RWQE(list);
1133 if ((rwqe->rwqe_im_mblk == NULL) &&
1134 ((rwqe->rwqe_im_mblk = desballoc(
1135 rwqe->rwqe_copybuf.ic_bufaddr, len, 0,
1136 &rwqe->w_freemsg_cb)) == NULL)) {
1137 DPRINT(40, "ibd_rc_repost_srq_free_list: "
1138 "failed in desballoc()");
1139 do {
1140 ibd_rc_srq_free_rwqe(state, rwqe);
1141 list = list->w_next;
1142 rwqe = WQE_TO_RWQE(list);
1143 } while (list != NULL);
1144 return (DDI_FAILURE);
1145 }
1146 if (ibd_rc_post_srq(state, rwqe) == DDI_FAILURE) {
1147 ibd_rc_srq_free_rwqe(state, rwqe);
1148 }
1149 list = list->w_next;
1150 }
1151 return (DDI_SUCCESS);
1152 }
1153 mutex_exit(&state->rc_srq_free_list.dl_mutex);
1154 return (DDI_SUCCESS);
1155 }
1156
1157 /*
1158 * Free an allocated recv wqe.
1159 */
1160 static void
ibd_rc_srq_free_rwqe(ibd_state_t * state,ibd_rwqe_t * rwqe)1161 ibd_rc_srq_free_rwqe(ibd_state_t *state, ibd_rwqe_t *rwqe)
1162 {
1163 /*
1164 * desballoc() failed (no memory) or the posting of rwqe failed.
1165 *
1166 * This rwqe is placed on a free list so that it
1167 * can be reinstated in future.
1168 *
1169 * NOTE: no code currently exists to reinstate
1170 * these "lost" rwqes.
1171 */
1172 mutex_enter(&state->rc_srq_free_list.dl_mutex);
1173 state->rc_srq_free_list.dl_cnt++;
1174 rwqe->rwqe_next = state->rc_srq_free_list.dl_head;
1175 state->rc_srq_free_list.dl_head = RWQE_TO_WQE(rwqe);
1176 mutex_exit(&state->rc_srq_free_list.dl_mutex);
1177 }
1178
1179 static void
ibd_rc_srq_freemsg_cb(char * arg)1180 ibd_rc_srq_freemsg_cb(char *arg)
1181 {
1182 ibd_rwqe_t *rwqe = (ibd_rwqe_t *)arg;
1183 ibd_state_t *state = rwqe->w_state;
1184
1185 ASSERT(state->rc_enable_srq);
1186
1187 /*
1188 * If the driver is stopped, just free the rwqe.
1189 */
1190 if (atomic_add_32_nv(&state->id_running, 0) == 0) {
1191 if (!rwqe->w_freeing_wqe) {
1192 atomic_dec_32(
1193 &state->rc_srq_rwqe_list.dl_bufs_outstanding);
1194 DPRINT(6, "ibd_rc_srq_freemsg_cb: wqe being freed");
1195 rwqe->rwqe_im_mblk = NULL;
1196 ibd_rc_srq_free_rwqe(state, rwqe);
1197 }
1198 return;
1199 }
1200
1201 atomic_dec_32(&state->rc_srq_rwqe_list.dl_bufs_outstanding);
1202
1203 ASSERT(state->rc_srq_rwqe_list.dl_cnt < state->rc_srq_size);
1204 ASSERT(!rwqe->w_freeing_wqe);
1205
1206 /*
1207 * Upper layer has released held mblk, so we have
1208 * no more use for keeping the old pointer in
1209 * our rwqe.
1210 */
1211 rwqe->rwqe_im_mblk = desballoc(rwqe->rwqe_copybuf.ic_bufaddr,
1212 state->rc_mtu + IPOIB_GRH_SIZE, 0, &rwqe->w_freemsg_cb);
1213 if (rwqe->rwqe_im_mblk == NULL) {
1214 DPRINT(40, "ibd_rc_srq_freemsg_cb: desballoc failed");
1215 ibd_rc_srq_free_rwqe(state, rwqe);
1216 return;
1217 }
1218
1219 if (ibd_rc_post_srq(state, rwqe) == DDI_FAILURE) {
1220 ibd_print_warn(state, "ibd_rc_srq_freemsg_cb: ibd_rc_post_srq"
1221 " failed");
1222 ibd_rc_srq_free_rwqe(state, rwqe);
1223 return;
1224 }
1225 }
1226
1227 /*
1228 * Post a rwqe to the hardware and add it to the Rx list.
1229 */
1230 static int
ibd_rc_post_srq(ibd_state_t * state,ibd_rwqe_t * rwqe)1231 ibd_rc_post_srq(ibd_state_t *state, ibd_rwqe_t *rwqe)
1232 {
1233 /*
1234 * Here we should add dl_cnt before post recv, because
1235 * we would have to make sure dl_cnt is updated before
1236 * the corresponding ibd_rc_process_rx() is called.
1237 */
1238 ASSERT(state->rc_srq_rwqe_list.dl_cnt < state->rc_srq_size);
1239 atomic_inc_32(&state->rc_srq_rwqe_list.dl_cnt);
1240 if (ibt_post_srq(state->rc_srq_hdl, &rwqe->w_rwr, 1, NULL) !=
1241 IBT_SUCCESS) {
1242 atomic_dec_32(&state->rc_srq_rwqe_list.dl_cnt);
1243 DPRINT(40, "ibd_rc_post_srq : ibt_post_srq() failed");
1244 return (DDI_FAILURE);
1245 }
1246
1247 return (DDI_SUCCESS);
1248 }
1249
1250 /*
1251 * Post a rwqe to the hardware and add it to the Rx list.
1252 */
1253 static int
ibd_rc_post_rwqe(ibd_rc_chan_t * chan,ibd_rwqe_t * rwqe)1254 ibd_rc_post_rwqe(ibd_rc_chan_t *chan, ibd_rwqe_t *rwqe)
1255 {
1256 /*
1257 * Here we should add dl_cnt before post recv, because we would
1258 * have to make sure dl_cnt has already updated before
1259 * corresponding ibd_rc_process_rx() is called.
1260 */
1261 atomic_inc_32(&chan->rx_wqe_list.dl_cnt);
1262 if (ibt_post_recv(chan->chan_hdl, &rwqe->w_rwr, 1, NULL) !=
1263 IBT_SUCCESS) {
1264 atomic_dec_32(&chan->rx_wqe_list.dl_cnt);
1265 DPRINT(40, "ibd_rc_post_rwqe : failed in ibt_post_recv()");
1266 return (DDI_FAILURE);
1267 }
1268 return (DDI_SUCCESS);
1269 }
1270
1271 static int
ibd_rc_alloc_rx_copybufs(ibd_rc_chan_t * chan)1272 ibd_rc_alloc_rx_copybufs(ibd_rc_chan_t *chan)
1273 {
1274 ibd_state_t *state = chan->state;
1275 ibt_mr_attr_t mem_attr;
1276 uint_t rc_rx_bufs_sz;
1277
1278 /*
1279 * Allocate one big chunk for all regular rx copy bufs
1280 */
1281 rc_rx_bufs_sz = (state->rc_mtu + IPOIB_GRH_SIZE) * chan->rcq_size;
1282
1283 chan->rx_bufs = kmem_zalloc(rc_rx_bufs_sz, KM_SLEEP);
1284
1285 chan->rx_rwqes = kmem_zalloc(chan->rcq_size *
1286 sizeof (ibd_rwqe_t), KM_SLEEP);
1287
1288 /*
1289 * Do one memory registration on the entire rxbuf area
1290 */
1291 mem_attr.mr_vaddr = (uint64_t)(uintptr_t)chan->rx_bufs;
1292 mem_attr.mr_len = rc_rx_bufs_sz;
1293 mem_attr.mr_as = NULL;
1294 mem_attr.mr_flags = IBT_MR_SLEEP | IBT_MR_ENABLE_LOCAL_WRITE;
1295 if (ibt_register_mr(state->id_hca_hdl, state->id_pd_hdl, &mem_attr,
1296 &chan->rx_mr_hdl, &chan->rx_mr_desc) != IBT_SUCCESS) {
1297 DPRINT(40, "ibd_rc_alloc_srq_copybufs: ibt_register_mr failed");
1298 kmem_free(chan->rx_rwqes, chan->rcq_size * sizeof (ibd_rwqe_t));
1299 kmem_free(chan->rx_bufs, rc_rx_bufs_sz);
1300 chan->rx_bufs = NULL;
1301 chan->rx_rwqes = NULL;
1302 return (DDI_FAILURE);
1303 }
1304
1305 return (DDI_SUCCESS);
1306 }
1307
1308 static void
ibd_rc_free_rx_copybufs(ibd_rc_chan_t * chan)1309 ibd_rc_free_rx_copybufs(ibd_rc_chan_t *chan)
1310 {
1311 ibd_state_t *state = chan->state;
1312 uint_t rc_rx_buf_sz;
1313
1314 ASSERT(!state->rc_enable_srq);
1315 ASSERT(chan->rx_rwqes != NULL);
1316 ASSERT(chan->rx_bufs != NULL);
1317
1318 /*
1319 * Don't change the value of state->rc_mtu at the period from call
1320 * ibd_rc_alloc_rx_copybufs() to call ibd_rc_free_rx_copybufs().
1321 */
1322 rc_rx_buf_sz = state->rc_mtu + IPOIB_GRH_SIZE;
1323
1324 /*
1325 * Unregister rxbuf mr
1326 */
1327 if (ibt_deregister_mr(state->id_hca_hdl,
1328 chan->rx_mr_hdl) != IBT_SUCCESS) {
1329 DPRINT(40, "ibd_rc_free_rx_copybufs: ibt_deregister_mr failed");
1330 }
1331 chan->rx_mr_hdl = NULL;
1332
1333 /*
1334 * Free rxbuf memory
1335 */
1336 kmem_free(chan->rx_rwqes, chan->rcq_size * sizeof (ibd_rwqe_t));
1337 chan->rx_rwqes = NULL;
1338
1339 kmem_free(chan->rx_bufs, chan->rcq_size * rc_rx_buf_sz);
1340 chan->rx_bufs = NULL;
1341 }
1342
1343 /*
1344 * Post a certain number of receive buffers and WRs on a RC channel.
1345 */
1346 static int
ibd_rc_init_rxlist(ibd_rc_chan_t * chan)1347 ibd_rc_init_rxlist(ibd_rc_chan_t *chan)
1348 {
1349 ibd_state_t *state = chan->state;
1350 ibd_rwqe_t *rwqe;
1351 ibt_lkey_t lkey;
1352 int i;
1353 uint_t len;
1354 uint8_t *bufaddr;
1355
1356 ASSERT(!state->rc_enable_srq);
1357 if (ibd_rc_alloc_rx_copybufs(chan) != DDI_SUCCESS)
1358 return (DDI_FAILURE);
1359
1360 /*
1361 * Allocate and setup the rwqe list
1362 */
1363 lkey = chan->rx_mr_desc.md_lkey;
1364 rwqe = chan->rx_rwqes;
1365 bufaddr = chan->rx_bufs;
1366 len = state->rc_mtu + IPOIB_GRH_SIZE;
1367 for (i = 0; i < chan->rcq_size; i++, rwqe++, bufaddr += len) {
1368 rwqe->w_state = state;
1369 rwqe->w_chan = chan;
1370 rwqe->w_freeing_wqe = B_FALSE;
1371 rwqe->w_freemsg_cb.free_func = ibd_rc_freemsg_cb;
1372 rwqe->w_freemsg_cb.free_arg = (char *)rwqe;
1373 rwqe->rwqe_copybuf.ic_bufaddr = bufaddr;
1374
1375 if ((rwqe->rwqe_im_mblk = desballoc(bufaddr, len, 0,
1376 &rwqe->w_freemsg_cb)) == NULL) {
1377 DPRINT(40, "ibd_rc_init_srq_list: desballoc() failed");
1378 rwqe->rwqe_copybuf.ic_bufaddr = NULL;
1379 ibd_rc_fini_rxlist(chan);
1380 return (DDI_FAILURE);
1381 }
1382
1383 rwqe->rwqe_copybuf.ic_sgl.ds_key = lkey;
1384 rwqe->rwqe_copybuf.ic_sgl.ds_va =
1385 (ib_vaddr_t)(uintptr_t)(bufaddr + IPOIB_GRH_SIZE);
1386 rwqe->rwqe_copybuf.ic_sgl.ds_len = state->rc_mtu;
1387 rwqe->w_rwr.wr_id = (ibt_wrid_t)(uintptr_t)rwqe;
1388 rwqe->w_rwr.wr_nds = 1;
1389 rwqe->w_rwr.wr_sgl = &rwqe->rwqe_copybuf.ic_sgl;
1390 (void) ibd_rc_post_rwqe(chan, rwqe);
1391 }
1392
1393 return (DDI_SUCCESS);
1394 }
1395
1396 /*
1397 * Free the statically allocated Rx buffer list for SRQ.
1398 */
1399 static void
ibd_rc_fini_rxlist(ibd_rc_chan_t * chan)1400 ibd_rc_fini_rxlist(ibd_rc_chan_t *chan)
1401 {
1402 ibd_rwqe_t *rwqe;
1403 int i;
1404
1405 if (chan->rx_bufs == NULL) {
1406 DPRINT(40, "ibd_rc_fini_rxlist: empty chan->rx_bufs, quit");
1407 return;
1408 }
1409
1410 /* bufs_outstanding must be 0 */
1411 ASSERT((chan->rx_wqe_list.dl_head == NULL) ||
1412 (chan->rx_wqe_list.dl_bufs_outstanding == 0));
1413
1414 mutex_enter(&chan->rx_wqe_list.dl_mutex);
1415 rwqe = chan->rx_rwqes;
1416 for (i = 0; i < chan->rcq_size; i++, rwqe++) {
1417 if (rwqe->rwqe_im_mblk != NULL) {
1418 rwqe->w_freeing_wqe = B_TRUE;
1419 freemsg(rwqe->rwqe_im_mblk);
1420 }
1421 }
1422 mutex_exit(&chan->rx_wqe_list.dl_mutex);
1423
1424 ibd_rc_free_rx_copybufs(chan);
1425 }
1426
1427 /*
1428 * Free an allocated recv wqe.
1429 */
1430 static void
ibd_rc_free_rwqe(ibd_rc_chan_t * chan,ibd_rwqe_t * rwqe)1431 ibd_rc_free_rwqe(ibd_rc_chan_t *chan, ibd_rwqe_t *rwqe)
1432 {
1433 /*
1434 * desballoc() failed (no memory) or the posting of rwqe failed.
1435 *
1436 * This rwqe is placed on a free list so that it
1437 * can be reinstated in future.
1438 *
1439 * NOTE: no code currently exists to reinstate
1440 * these "lost" rwqes.
1441 */
1442 mutex_enter(&chan->rx_free_list.dl_mutex);
1443 chan->rx_free_list.dl_cnt++;
1444 rwqe->rwqe_next = chan->rx_free_list.dl_head;
1445 chan->rx_free_list.dl_head = RWQE_TO_WQE(rwqe);
1446 mutex_exit(&chan->rx_free_list.dl_mutex);
1447 }
1448
1449 /*
1450 * Processing to be done after receipt of a packet; hand off to GLD
1451 * in the format expected by GLD.
1452 */
1453 static void
ibd_rc_process_rx(ibd_rc_chan_t * chan,ibd_rwqe_t * rwqe,ibt_wc_t * wc)1454 ibd_rc_process_rx(ibd_rc_chan_t *chan, ibd_rwqe_t *rwqe, ibt_wc_t *wc)
1455 {
1456 ibd_state_t *state = chan->state;
1457 ib_header_info_t *phdr;
1458 ipoib_hdr_t *ipibp;
1459 mblk_t *mp;
1460 mblk_t *mpc;
1461 int rxcnt;
1462 ip6_t *ip6h;
1463 int len;
1464
1465 /*
1466 * Track number handed to upper layer, and number still
1467 * available to receive packets.
1468 */
1469 if (state->rc_enable_srq) {
1470 rxcnt = atomic_dec_32_nv(&state->rc_srq_rwqe_list.dl_cnt);
1471 } else {
1472 rxcnt = atomic_dec_32_nv(&chan->rx_wqe_list.dl_cnt);
1473 }
1474
1475 /*
1476 * It can not be a IBA multicast packet.
1477 */
1478 ASSERT(!wc->wc_flags & IBT_WC_GRH_PRESENT);
1479
1480 /* For the connection reaper routine ibd_rc_conn_timeout_call() */
1481 chan->is_used = B_TRUE;
1482
1483 #ifdef DEBUG
1484 if (rxcnt < state->id_rc_rx_rwqe_thresh) {
1485 state->rc_rwqe_short++;
1486 }
1487 #endif
1488
1489 /*
1490 * Possibly replenish the Rx pool if needed.
1491 */
1492 if ((rxcnt >= state->id_rc_rx_rwqe_thresh) &&
1493 (wc->wc_bytes_xfer > state->id_rc_rx_copy_thresh)) {
1494 atomic_add_64(&state->rc_rcv_trans_byte, wc->wc_bytes_xfer);
1495 atomic_inc_64(&state->rc_rcv_trans_pkt);
1496
1497 /*
1498 * Record how many rwqe has been occupied by upper
1499 * network layer
1500 */
1501 if (state->rc_enable_srq) {
1502 atomic_inc_32(
1503 &state->rc_srq_rwqe_list.dl_bufs_outstanding);
1504 } else {
1505 atomic_inc_32(&chan->rx_wqe_list.dl_bufs_outstanding);
1506 }
1507 mp = rwqe->rwqe_im_mblk;
1508 } else {
1509 atomic_add_64(&state->rc_rcv_copy_byte, wc->wc_bytes_xfer);
1510 atomic_inc_64(&state->rc_rcv_copy_pkt);
1511
1512 if ((mp = allocb(wc->wc_bytes_xfer + IPOIB_GRH_SIZE,
1513 BPRI_HI)) == NULL) { /* no memory */
1514 DPRINT(40, "ibd_rc_process_rx: allocb() failed");
1515 state->rc_rcv_alloc_fail++;
1516 if (state->rc_enable_srq) {
1517 if (ibd_rc_post_srq(state, rwqe) ==
1518 DDI_FAILURE) {
1519 ibd_rc_srq_free_rwqe(state, rwqe);
1520 }
1521 } else {
1522 if (ibd_rc_post_rwqe(chan, rwqe) ==
1523 DDI_FAILURE) {
1524 ibd_rc_free_rwqe(chan, rwqe);
1525 }
1526 }
1527 return;
1528 }
1529
1530 bcopy(rwqe->rwqe_im_mblk->b_rptr + IPOIB_GRH_SIZE,
1531 mp->b_wptr + IPOIB_GRH_SIZE, wc->wc_bytes_xfer);
1532
1533 if (state->rc_enable_srq) {
1534 if (ibd_rc_post_srq(state, rwqe) == DDI_FAILURE) {
1535 ibd_rc_srq_free_rwqe(state, rwqe);
1536 }
1537 } else {
1538 if (ibd_rc_post_rwqe(chan, rwqe) == DDI_FAILURE) {
1539 ibd_rc_free_rwqe(chan, rwqe);
1540 }
1541 }
1542 }
1543
1544 ipibp = (ipoib_hdr_t *)((uchar_t *)mp->b_rptr + IPOIB_GRH_SIZE);
1545 if (ntohs(ipibp->ipoib_type) == ETHERTYPE_IPV6) {
1546 ip6h = (ip6_t *)((uchar_t *)ipibp + sizeof (ipoib_hdr_t));
1547 len = ntohs(ip6h->ip6_plen);
1548 if (ip6h->ip6_nxt == IPPROTO_ICMPV6) {
1549 /* LINTED: E_CONSTANT_CONDITION */
1550 IBD_PAD_NSNA(ip6h, len, IBD_RECV);
1551 }
1552 }
1553
1554 phdr = (ib_header_info_t *)mp->b_rptr;
1555 phdr->ib_grh.ipoib_vertcflow = 0;
1556 ovbcopy(&state->id_macaddr, &phdr->ib_dst,
1557 sizeof (ipoib_mac_t));
1558 mp->b_wptr = mp->b_rptr + wc->wc_bytes_xfer+ IPOIB_GRH_SIZE;
1559
1560 /*
1561 * Can RC mode in IB guarantee its checksum correctness?
1562 *
1563 * (void) hcksum_assoc(mp, NULL, NULL, 0, 0, 0, 0,
1564 * HCK_FULLCKSUM | HCK_FULLCKSUM_OK, 0);
1565 */
1566
1567 /*
1568 * Make sure this is NULL or we're in trouble.
1569 */
1570 if (mp->b_next != NULL) {
1571 ibd_print_warn(state,
1572 "ibd_rc_process_rx: got duplicate mp from rcq?");
1573 mp->b_next = NULL;
1574 }
1575
1576 /*
1577 * Add this mp to the list of processed mp's to send to
1578 * the nw layer
1579 */
1580 if (state->rc_enable_srq) {
1581 mutex_enter(&state->rc_rx_lock);
1582 if (state->rc_rx_mp) {
1583 ASSERT(state->rc_rx_mp_tail != NULL);
1584 state->rc_rx_mp_tail->b_next = mp;
1585 } else {
1586 ASSERT(state->rc_rx_mp_tail == NULL);
1587 state->rc_rx_mp = mp;
1588 }
1589
1590 state->rc_rx_mp_tail = mp;
1591 state->rc_rx_mp_len++;
1592
1593 if (state->rc_rx_mp_len >= IBD_MAX_RX_MP_LEN) {
1594 mpc = state->rc_rx_mp;
1595
1596 state->rc_rx_mp = NULL;
1597 state->rc_rx_mp_tail = NULL;
1598 state->rc_rx_mp_len = 0;
1599 mutex_exit(&state->rc_rx_lock);
1600 mac_rx(state->id_mh, NULL, mpc);
1601 } else {
1602 mutex_exit(&state->rc_rx_lock);
1603 }
1604 } else {
1605 mutex_enter(&chan->rx_lock);
1606 if (chan->rx_mp) {
1607 ASSERT(chan->rx_mp_tail != NULL);
1608 chan->rx_mp_tail->b_next = mp;
1609 } else {
1610 ASSERT(chan->rx_mp_tail == NULL);
1611 chan->rx_mp = mp;
1612 }
1613
1614 chan->rx_mp_tail = mp;
1615 chan->rx_mp_len++;
1616
1617 if (chan->rx_mp_len >= IBD_MAX_RX_MP_LEN) {
1618 mpc = chan->rx_mp;
1619
1620 chan->rx_mp = NULL;
1621 chan->rx_mp_tail = NULL;
1622 chan->rx_mp_len = 0;
1623 mutex_exit(&chan->rx_lock);
1624 mac_rx(state->id_mh, NULL, mpc);
1625 } else {
1626 mutex_exit(&chan->rx_lock);
1627 }
1628 }
1629 }
1630
1631 /*
1632 * Callback code invoked from STREAMs when the recv data buffer is free
1633 * for recycling.
1634 */
1635 static void
ibd_rc_freemsg_cb(char * arg)1636 ibd_rc_freemsg_cb(char *arg)
1637 {
1638 ibd_rwqe_t *rwqe = (ibd_rwqe_t *)arg;
1639 ibd_rc_chan_t *chan = rwqe->w_chan;
1640 ibd_state_t *state = rwqe->w_state;
1641
1642 /*
1643 * If the wqe is being destructed, do not attempt recycling.
1644 */
1645 if (rwqe->w_freeing_wqe == B_TRUE) {
1646 return;
1647 }
1648
1649 ASSERT(!state->rc_enable_srq);
1650 ASSERT(chan->rx_wqe_list.dl_cnt < chan->rcq_size);
1651
1652 rwqe->rwqe_im_mblk = desballoc(rwqe->rwqe_copybuf.ic_bufaddr,
1653 state->rc_mtu + IPOIB_GRH_SIZE, 0, &rwqe->w_freemsg_cb);
1654 if (rwqe->rwqe_im_mblk == NULL) {
1655 DPRINT(40, "ibd_rc_freemsg_cb: desballoc() failed");
1656 ibd_rc_free_rwqe(chan, rwqe);
1657 return;
1658 }
1659
1660 /*
1661 * Post back to h/w. We could actually have more than
1662 * id_num_rwqe WQEs on the list if there were multiple
1663 * ibd_freemsg_cb() calls outstanding (since the lock is
1664 * not held the entire time). This will start getting
1665 * corrected over subsequent ibd_freemsg_cb() calls.
1666 */
1667 if (ibd_rc_post_rwqe(chan, rwqe) == DDI_FAILURE) {
1668 ibd_rc_free_rwqe(chan, rwqe);
1669 return;
1670 }
1671 atomic_dec_32(&chan->rx_wqe_list.dl_bufs_outstanding);
1672 }
1673
1674 /*
1675 * Common code for interrupt handling as well as for polling
1676 * for all completed wqe's while detaching.
1677 */
1678 static void
ibd_rc_poll_rcq(ibd_rc_chan_t * chan,ibt_cq_hdl_t cq_hdl)1679 ibd_rc_poll_rcq(ibd_rc_chan_t *chan, ibt_cq_hdl_t cq_hdl)
1680 {
1681 ibd_wqe_t *wqe;
1682 ibt_wc_t *wc, *wcs;
1683 uint_t numwcs, real_numwcs;
1684 int i;
1685
1686 wcs = chan->rx_wc;
1687 numwcs = IBD_RC_MAX_CQ_WC;
1688
1689 while (ibt_poll_cq(cq_hdl, wcs, numwcs, &real_numwcs) == IBT_SUCCESS) {
1690 for (i = 0, wc = wcs; i < real_numwcs; i++, wc++) {
1691 wqe = (ibd_wqe_t *)(uintptr_t)wc->wc_id;
1692 if (wc->wc_status != IBT_WC_SUCCESS) {
1693 chan->state->rc_rcq_err++;
1694 /*
1695 * Channel being torn down.
1696 */
1697 DPRINT(40, "ibd_rc_poll_rcq: wc_status(%d) != "
1698 "SUCC, chan=%p", wc->wc_status, chan);
1699 if (wc->wc_status == IBT_WC_WR_FLUSHED_ERR) {
1700 /*
1701 * Do not invoke Rx handler because
1702 * it might add buffers to the Rx pool
1703 * when we are trying to deinitialize.
1704 */
1705 continue;
1706 }
1707 }
1708 ibd_rc_process_rx(chan, WQE_TO_RWQE(wqe), wc);
1709 }
1710 }
1711 }
1712
1713 /* Receive CQ handler */
1714 /* ARGSUSED */
1715 static void
ibd_rc_rcq_handler(ibt_cq_hdl_t cq_hdl,void * arg)1716 ibd_rc_rcq_handler(ibt_cq_hdl_t cq_hdl, void *arg)
1717 {
1718 ibd_rc_chan_t *chan = (ibd_rc_chan_t *)arg;
1719 ibd_state_t *state = chan->state;
1720
1721 atomic_inc_32(&chan->rcq_invoking);
1722 ASSERT(chan->chan_state == IBD_RC_STATE_PAS_ESTAB);
1723
1724 /*
1725 * Poll for completed entries; the CQ will not interrupt any
1726 * more for incoming (or transmitted) packets.
1727 */
1728 ibd_rc_poll_rcq(chan, chan->rcq_hdl);
1729
1730 /*
1731 * Now enable CQ notifications; all packets that arrive now
1732 * (or complete transmission) will cause new interrupts.
1733 */
1734 if (ibt_enable_cq_notify(chan->rcq_hdl, IBT_NEXT_COMPLETION) !=
1735 IBT_SUCCESS) {
1736 /*
1737 * We do not expect a failure here.
1738 */
1739 DPRINT(40, "ibd_rc_rcq_handler: ibt_enable_cq_notify() failed");
1740 }
1741
1742 /*
1743 * Repoll to catch all packets that might have arrived after
1744 * we finished the first poll loop and before interrupts got
1745 * armed.
1746 */
1747 ibd_rc_poll_rcq(chan, chan->rcq_hdl);
1748
1749 if (state->rc_enable_srq) {
1750 mutex_enter(&state->rc_rx_lock);
1751
1752 if (state->rc_rx_mp != NULL) {
1753 mblk_t *mpc;
1754 mpc = state->rc_rx_mp;
1755
1756 state->rc_rx_mp = NULL;
1757 state->rc_rx_mp_tail = NULL;
1758 state->rc_rx_mp_len = 0;
1759
1760 mutex_exit(&state->rc_rx_lock);
1761 mac_rx(state->id_mh, NULL, mpc);
1762 } else {
1763 mutex_exit(&state->rc_rx_lock);
1764 }
1765 } else {
1766 mutex_enter(&chan->rx_lock);
1767
1768 if (chan->rx_mp != NULL) {
1769 mblk_t *mpc;
1770 mpc = chan->rx_mp;
1771
1772 chan->rx_mp = NULL;
1773 chan->rx_mp_tail = NULL;
1774 chan->rx_mp_len = 0;
1775
1776 mutex_exit(&chan->rx_lock);
1777 mac_rx(state->id_mh, NULL, mpc);
1778 } else {
1779 mutex_exit(&chan->rx_lock);
1780 }
1781 }
1782 atomic_dec_32(&chan->rcq_invoking);
1783 }
1784
1785 /*
1786 * Allocate the statically allocated Tx buffer list.
1787 */
1788 int
ibd_rc_init_tx_largebuf_list(ibd_state_t * state)1789 ibd_rc_init_tx_largebuf_list(ibd_state_t *state)
1790 {
1791 ibd_rc_tx_largebuf_t *lbufp;
1792 ibd_rc_tx_largebuf_t *tail;
1793 uint8_t *memp;
1794 ibt_mr_attr_t mem_attr;
1795 uint32_t num_swqe;
1796 size_t mem_size;
1797 int i;
1798
1799 num_swqe = state->id_rc_num_swqe - 1;
1800
1801 /*
1802 * Allocate one big chunk for all Tx large copy bufs
1803 */
1804 /* Don't transfer IPOIB_GRH_SIZE bytes (40 bytes) */
1805 mem_size = num_swqe * state->rc_mtu;
1806 state->rc_tx_mr_bufs = kmem_zalloc(mem_size, KM_SLEEP);
1807
1808 mem_attr.mr_len = mem_size;
1809 mem_attr.mr_vaddr = (uint64_t)(uintptr_t)state->rc_tx_mr_bufs;
1810 mem_attr.mr_as = NULL;
1811 mem_attr.mr_flags = IBT_MR_SLEEP;
1812 if (ibt_register_mr(state->id_hca_hdl, state->id_pd_hdl, &mem_attr,
1813 &state->rc_tx_mr_hdl, &state->rc_tx_mr_desc) != IBT_SUCCESS) {
1814 DPRINT(40, "ibd_rc_init_tx_largebuf_list: ibt_register_mr "
1815 "failed");
1816 kmem_free(state->rc_tx_mr_bufs, mem_size);
1817 state->rc_tx_mr_bufs = NULL;
1818 return (DDI_FAILURE);
1819 }
1820
1821 state->rc_tx_largebuf_desc_base = kmem_zalloc(num_swqe *
1822 sizeof (ibd_rc_tx_largebuf_t), KM_SLEEP);
1823
1824 /*
1825 * Set up the buf chain
1826 */
1827 memp = state->rc_tx_mr_bufs;
1828 mutex_enter(&state->rc_tx_large_bufs_lock);
1829 lbufp = state->rc_tx_largebuf_desc_base;
1830 for (i = 0; i < num_swqe; i++) {
1831 lbufp->lb_buf = memp;
1832 lbufp->lb_next = lbufp + 1;
1833
1834 tail = lbufp;
1835
1836 memp += state->rc_mtu;
1837 lbufp++;
1838 }
1839 tail->lb_next = NULL;
1840
1841 /*
1842 * Set up the buffer information in ibd state
1843 */
1844 state->rc_tx_largebuf_free_head = state->rc_tx_largebuf_desc_base;
1845 state->rc_tx_largebuf_nfree = num_swqe;
1846 mutex_exit(&state->rc_tx_large_bufs_lock);
1847 return (DDI_SUCCESS);
1848 }
1849
1850 void
ibd_rc_fini_tx_largebuf_list(ibd_state_t * state)1851 ibd_rc_fini_tx_largebuf_list(ibd_state_t *state)
1852 {
1853 uint32_t num_swqe;
1854
1855 num_swqe = state->id_rc_num_swqe - 1;
1856
1857 if (ibt_deregister_mr(state->id_hca_hdl,
1858 state->rc_tx_mr_hdl) != IBT_SUCCESS) {
1859 DPRINT(40, "ibd_rc_fini_tx_largebuf_list: ibt_deregister_mr() "
1860 "failed");
1861 }
1862 state->rc_tx_mr_hdl = NULL;
1863
1864 kmem_free(state->rc_tx_mr_bufs, num_swqe * state->rc_mtu);
1865 state->rc_tx_mr_bufs = NULL;
1866
1867 kmem_free(state->rc_tx_largebuf_desc_base,
1868 num_swqe * sizeof (ibd_rc_tx_largebuf_t));
1869 state->rc_tx_largebuf_desc_base = NULL;
1870 }
1871
1872 static int
ibd_rc_alloc_tx_copybufs(ibd_rc_chan_t * chan)1873 ibd_rc_alloc_tx_copybufs(ibd_rc_chan_t *chan)
1874 {
1875 ibt_mr_attr_t mem_attr;
1876 ibd_state_t *state;
1877
1878 state = chan->state;
1879 ASSERT(state != NULL);
1880
1881 /*
1882 * Allocate one big chunk for all regular tx copy bufs
1883 */
1884 mem_attr.mr_len = chan->scq_size * state->id_rc_tx_copy_thresh;
1885
1886 chan->tx_mr_bufs = kmem_zalloc(mem_attr.mr_len, KM_SLEEP);
1887
1888 /*
1889 * Do one memory registration on the entire txbuf area
1890 */
1891 mem_attr.mr_vaddr = (uint64_t)(uintptr_t)chan->tx_mr_bufs;
1892 mem_attr.mr_as = NULL;
1893 mem_attr.mr_flags = IBT_MR_SLEEP;
1894 if (ibt_register_mr(state->id_hca_hdl, state->id_pd_hdl, &mem_attr,
1895 &chan->tx_mr_hdl, &chan->tx_mr_desc) != IBT_SUCCESS) {
1896 DPRINT(40, "ibd_rc_alloc_tx_copybufs: ibt_register_mr failed");
1897 ASSERT(mem_attr.mr_len ==
1898 chan->scq_size * state->id_rc_tx_copy_thresh);
1899 kmem_free(chan->tx_mr_bufs, mem_attr.mr_len);
1900 chan->tx_mr_bufs = NULL;
1901 return (DDI_FAILURE);
1902 }
1903
1904 return (DDI_SUCCESS);
1905 }
1906
1907 /*
1908 * Allocate the statically allocated Tx buffer list.
1909 */
1910 static int
ibd_rc_init_txlist(ibd_rc_chan_t * chan)1911 ibd_rc_init_txlist(ibd_rc_chan_t *chan)
1912 {
1913 ibd_swqe_t *swqe;
1914 int i;
1915 ibt_lkey_t lkey;
1916 ibd_state_t *state = chan->state;
1917
1918 if (ibd_rc_alloc_tx_copybufs(chan) != DDI_SUCCESS)
1919 return (DDI_FAILURE);
1920
1921 /*
1922 * Allocate and setup the swqe list
1923 */
1924 lkey = chan->tx_mr_desc.md_lkey;
1925 chan->tx_wqes = kmem_zalloc(chan->scq_size *
1926 sizeof (ibd_swqe_t), KM_SLEEP);
1927 swqe = chan->tx_wqes;
1928 for (i = 0; i < chan->scq_size; i++, swqe++) {
1929 swqe->swqe_next = NULL;
1930 swqe->swqe_im_mblk = NULL;
1931
1932 swqe->swqe_copybuf.ic_sgl.ds_key = lkey;
1933 swqe->swqe_copybuf.ic_sgl.ds_len = 0; /* set in send */
1934
1935 swqe->w_swr.wr_id = (ibt_wrid_t)(uintptr_t)swqe;
1936 swqe->w_swr.wr_flags = IBT_WR_SEND_SIGNAL;
1937 swqe->swqe_copybuf.ic_sgl.ds_va = (ib_vaddr_t)(uintptr_t)
1938 (chan->tx_mr_bufs + i * state->id_rc_tx_copy_thresh);
1939 swqe->w_swr.wr_trans = IBT_RC_SRV;
1940
1941 /* Add to list */
1942 mutex_enter(&chan->tx_wqe_list.dl_mutex);
1943 chan->tx_wqe_list.dl_cnt++;
1944 swqe->swqe_next = chan->tx_wqe_list.dl_head;
1945 chan->tx_wqe_list.dl_head = SWQE_TO_WQE(swqe);
1946 mutex_exit(&chan->tx_wqe_list.dl_mutex);
1947 }
1948
1949 return (DDI_SUCCESS);
1950 }
1951
1952 /*
1953 * Free the statically allocated Tx buffer list.
1954 */
1955 static void
ibd_rc_fini_txlist(ibd_rc_chan_t * chan)1956 ibd_rc_fini_txlist(ibd_rc_chan_t *chan)
1957 {
1958 ibd_state_t *state = chan->state;
1959 if (chan->tx_mr_hdl != NULL) {
1960 if (ibt_deregister_mr(chan->state->id_hca_hdl,
1961 chan->tx_mr_hdl) != IBT_SUCCESS) {
1962 DPRINT(40, "ibd_rc_fini_txlist: ibt_deregister_mr "
1963 "failed");
1964 }
1965 chan->tx_mr_hdl = NULL;
1966 }
1967
1968 if (chan->tx_mr_bufs != NULL) {
1969 kmem_free(chan->tx_mr_bufs, chan->scq_size *
1970 state->id_rc_tx_copy_thresh);
1971 chan->tx_mr_bufs = NULL;
1972 }
1973
1974 if (chan->tx_wqes != NULL) {
1975 kmem_free(chan->tx_wqes, chan->scq_size *
1976 sizeof (ibd_swqe_t));
1977 chan->tx_wqes = NULL;
1978 }
1979 }
1980
1981 /*
1982 * Acquire send wqe from free list.
1983 * Returns error number and send wqe pointer.
1984 */
1985 ibd_swqe_t *
ibd_rc_acquire_swqes(ibd_rc_chan_t * chan)1986 ibd_rc_acquire_swqes(ibd_rc_chan_t *chan)
1987 {
1988 ibd_swqe_t *wqe;
1989
1990 mutex_enter(&chan->tx_rel_list.dl_mutex);
1991 if (chan->tx_rel_list.dl_head != NULL) {
1992 /* transfer id_tx_rel_list to id_tx_list */
1993 chan->tx_wqe_list.dl_head =
1994 chan->tx_rel_list.dl_head;
1995 chan->tx_wqe_list.dl_cnt =
1996 chan->tx_rel_list.dl_cnt;
1997 chan->tx_wqe_list.dl_pending_sends = B_FALSE;
1998
1999 /* clear id_tx_rel_list */
2000 chan->tx_rel_list.dl_head = NULL;
2001 chan->tx_rel_list.dl_cnt = 0;
2002 mutex_exit(&chan->tx_rel_list.dl_mutex);
2003
2004 wqe = WQE_TO_SWQE(chan->tx_wqe_list.dl_head);
2005 chan->tx_wqe_list.dl_cnt -= 1;
2006 chan->tx_wqe_list.dl_head = wqe->swqe_next;
2007 } else { /* no free swqe */
2008 mutex_exit(&chan->tx_rel_list.dl_mutex);
2009 chan->tx_wqe_list.dl_pending_sends = B_TRUE;
2010 wqe = NULL;
2011 }
2012 return (wqe);
2013 }
2014
2015 /*
2016 * Release send wqe back into free list.
2017 */
2018 static void
ibd_rc_release_swqe(ibd_rc_chan_t * chan,ibd_swqe_t * swqe)2019 ibd_rc_release_swqe(ibd_rc_chan_t *chan, ibd_swqe_t *swqe)
2020 {
2021 /*
2022 * Add back on Tx list for reuse.
2023 */
2024 swqe->swqe_next = NULL;
2025 mutex_enter(&chan->tx_rel_list.dl_mutex);
2026 chan->tx_rel_list.dl_pending_sends = B_FALSE;
2027 swqe->swqe_next = chan->tx_rel_list.dl_head;
2028 chan->tx_rel_list.dl_head = SWQE_TO_WQE(swqe);
2029 chan->tx_rel_list.dl_cnt++;
2030 mutex_exit(&chan->tx_rel_list.dl_mutex);
2031 }
2032
2033 void
ibd_rc_post_send(ibd_rc_chan_t * chan,ibd_swqe_t * node)2034 ibd_rc_post_send(ibd_rc_chan_t *chan, ibd_swqe_t *node)
2035 {
2036 uint_t i;
2037 uint_t num_posted;
2038 uint_t n_wrs;
2039 ibt_status_t ibt_status;
2040 ibt_send_wr_t wrs[IBD_MAX_TX_POST_MULTIPLE];
2041 ibd_swqe_t *tx_head, *elem;
2042 ibd_swqe_t *nodes[IBD_MAX_TX_POST_MULTIPLE];
2043
2044 /* post the one request, then check for more */
2045 ibt_status = ibt_post_send(chan->chan_hdl,
2046 &node->w_swr, 1, NULL);
2047 if (ibt_status != IBT_SUCCESS) {
2048 ibd_print_warn(chan->state, "ibd_post_send: "
2049 "posting one wr failed: ret=%d", ibt_status);
2050 ibd_rc_tx_cleanup(node);
2051 }
2052
2053 tx_head = NULL;
2054 for (;;) {
2055 if (tx_head == NULL) {
2056 mutex_enter(&chan->tx_post_lock);
2057 tx_head = chan->tx_head;
2058 if (tx_head == NULL) {
2059 chan->tx_busy = 0;
2060 mutex_exit(&chan->tx_post_lock);
2061 return;
2062 }
2063 chan->tx_head = NULL;
2064 mutex_exit(&chan->tx_post_lock);
2065 }
2066
2067 /*
2068 * Collect pending requests, IBD_MAX_TX_POST_MULTIPLE wrs
2069 * at a time if possible, and keep posting them.
2070 */
2071 for (n_wrs = 0, elem = tx_head;
2072 (elem) && (n_wrs < IBD_MAX_TX_POST_MULTIPLE);
2073 elem = WQE_TO_SWQE(elem->swqe_next), n_wrs++) {
2074 nodes[n_wrs] = elem;
2075 wrs[n_wrs] = elem->w_swr;
2076 }
2077 tx_head = elem;
2078
2079 ASSERT(n_wrs != 0);
2080
2081 /*
2082 * If posting fails for some reason, we'll never receive
2083 * completion intimation, so we'll need to cleanup. But
2084 * we need to make sure we don't clean up nodes whose
2085 * wrs have been successfully posted. We assume that the
2086 * hca driver returns on the first failure to post and
2087 * therefore the first 'num_posted' entries don't need
2088 * cleanup here.
2089 */
2090 num_posted = 0;
2091 ibt_status = ibt_post_send(chan->chan_hdl,
2092 wrs, n_wrs, &num_posted);
2093 if (ibt_status != IBT_SUCCESS) {
2094 ibd_print_warn(chan->state, "ibd_post_send: "
2095 "posting multiple wrs failed: "
2096 "requested=%d, done=%d, ret=%d",
2097 n_wrs, num_posted, ibt_status);
2098
2099 for (i = num_posted; i < n_wrs; i++)
2100 ibd_rc_tx_cleanup(nodes[i]);
2101 }
2102 }
2103 }
2104
2105 /*
2106 * Common code that deals with clean ups after a successful or
2107 * erroneous transmission attempt.
2108 */
2109 void
ibd_rc_tx_cleanup(ibd_swqe_t * swqe)2110 ibd_rc_tx_cleanup(ibd_swqe_t *swqe)
2111 {
2112 ibd_ace_t *ace = swqe->w_ahandle;
2113 ibd_state_t *state;
2114
2115 ASSERT(ace != NULL);
2116 ASSERT(ace->ac_chan != NULL);
2117
2118 state = ace->ac_chan->state;
2119
2120 /*
2121 * If this was a dynamic registration in ibd_send(),
2122 * deregister now.
2123 */
2124 if (swqe->swqe_im_mblk != NULL) {
2125 ASSERT(swqe->w_buftype == IBD_WQE_MAPPED);
2126 if (swqe->w_buftype == IBD_WQE_MAPPED) {
2127 ibd_unmap_mem(state, swqe);
2128 }
2129 freemsg(swqe->swqe_im_mblk);
2130 swqe->swqe_im_mblk = NULL;
2131 } else {
2132 ASSERT(swqe->w_buftype != IBD_WQE_MAPPED);
2133 }
2134
2135 if (swqe->w_buftype == IBD_WQE_RC_COPYBUF) {
2136 ibd_rc_tx_largebuf_t *lbufp;
2137
2138 lbufp = swqe->w_rc_tx_largebuf;
2139 ASSERT(lbufp != NULL);
2140
2141 mutex_enter(&state->rc_tx_large_bufs_lock);
2142 lbufp->lb_next = state->rc_tx_largebuf_free_head;
2143 state->rc_tx_largebuf_free_head = lbufp;
2144 state->rc_tx_largebuf_nfree ++;
2145 mutex_exit(&state->rc_tx_large_bufs_lock);
2146 swqe->w_rc_tx_largebuf = NULL;
2147 }
2148
2149
2150 /*
2151 * Release the send wqe for reuse.
2152 */
2153 ibd_rc_release_swqe(ace->ac_chan, swqe);
2154
2155 /*
2156 * Drop the reference count on the AH; it can be reused
2157 * now for a different destination if there are no more
2158 * posted sends that will use it. This can be eliminated
2159 * if we can always associate each Tx buffer with an AH.
2160 * The ace can be null if we are cleaning up from the
2161 * ibd_send() error path.
2162 */
2163 ibd_dec_ref_ace(state, ace);
2164 }
2165
2166 void
ibd_rc_drain_scq(ibd_rc_chan_t * chan,ibt_cq_hdl_t cq_hdl)2167 ibd_rc_drain_scq(ibd_rc_chan_t *chan, ibt_cq_hdl_t cq_hdl)
2168 {
2169 ibd_state_t *state = chan->state;
2170 ibd_wqe_t *wqe;
2171 ibt_wc_t *wc, *wcs;
2172 ibd_ace_t *ace;
2173 uint_t numwcs, real_numwcs;
2174 int i;
2175 boolean_t encount_error;
2176
2177 wcs = chan->tx_wc;
2178 numwcs = IBD_RC_MAX_CQ_WC;
2179 encount_error = B_FALSE;
2180
2181 while (ibt_poll_cq(cq_hdl, wcs, numwcs, &real_numwcs) == IBT_SUCCESS) {
2182 for (i = 0, wc = wcs; i < real_numwcs; i++, wc++) {
2183 wqe = (ibd_wqe_t *)(uintptr_t)wc->wc_id;
2184 if (wc->wc_status != IBT_WC_SUCCESS) {
2185 if (encount_error == B_FALSE) {
2186 /*
2187 * This RC channle is in error status,
2188 * remove it.
2189 */
2190 encount_error = B_TRUE;
2191 mutex_enter(&state->id_ac_mutex);
2192 if ((chan->chan_state ==
2193 IBD_RC_STATE_ACT_ESTAB) &&
2194 (chan->state->id_link_state ==
2195 LINK_STATE_UP) &&
2196 ((ace = ibd_acache_find(state,
2197 &chan->ace->ac_mac, B_FALSE, 0))
2198 != NULL) && (ace == chan->ace)) {
2199 ASSERT(ace->ac_mce == NULL);
2200 INC_REF(ace, 1);
2201 IBD_ACACHE_PULLOUT_ACTIVE(
2202 state, ace);
2203 chan->chan_state =
2204 IBD_RC_STATE_ACT_CLOSING;
2205 mutex_exit(&state->id_ac_mutex);
2206 state->rc_reset_cnt++;
2207 DPRINT(30, "ibd_rc_drain_scq: "
2208 "wc_status(%d) != SUCC, "
2209 "chan=%p, ace=%p, "
2210 "link_state=%d"
2211 "reset RC channel",
2212 wc->wc_status, chan,
2213 chan->ace, chan->state->
2214 id_link_state);
2215 ibd_rc_signal_act_close(
2216 state, ace);
2217 } else {
2218 mutex_exit(&state->id_ac_mutex);
2219 state->
2220 rc_act_close_simultaneous++;
2221 DPRINT(40, "ibd_rc_drain_scq: "
2222 "wc_status(%d) != SUCC, "
2223 "chan=%p, chan_state=%d,"
2224 "ace=%p, link_state=%d."
2225 "other thread is closing "
2226 "it", wc->wc_status, chan,
2227 chan->chan_state, chan->ace,
2228 chan->state->id_link_state);
2229 }
2230 }
2231 }
2232 ibd_rc_tx_cleanup(WQE_TO_SWQE(wqe));
2233 }
2234
2235 mutex_enter(&state->id_sched_lock);
2236 if (state->id_sched_needed == 0) {
2237 mutex_exit(&state->id_sched_lock);
2238 } else if (state->id_sched_needed & IBD_RSRC_RC_SWQE) {
2239 mutex_enter(&chan->tx_wqe_list.dl_mutex);
2240 mutex_enter(&chan->tx_rel_list.dl_mutex);
2241 if ((chan->tx_rel_list.dl_cnt +
2242 chan->tx_wqe_list.dl_cnt) > IBD_RC_TX_FREE_THRESH) {
2243 state->id_sched_needed &= ~IBD_RSRC_RC_SWQE;
2244 mutex_exit(&chan->tx_rel_list.dl_mutex);
2245 mutex_exit(&chan->tx_wqe_list.dl_mutex);
2246 mutex_exit(&state->id_sched_lock);
2247 state->rc_swqe_mac_update++;
2248 mac_tx_update(state->id_mh);
2249 } else {
2250 state->rc_scq_no_swqe++;
2251 mutex_exit(&chan->tx_rel_list.dl_mutex);
2252 mutex_exit(&chan->tx_wqe_list.dl_mutex);
2253 mutex_exit(&state->id_sched_lock);
2254 }
2255 } else if (state->id_sched_needed & IBD_RSRC_RC_TX_LARGEBUF) {
2256 mutex_enter(&state->rc_tx_large_bufs_lock);
2257 if (state->rc_tx_largebuf_nfree >
2258 IBD_RC_TX_FREE_THRESH) {
2259 ASSERT(state->rc_tx_largebuf_free_head != NULL);
2260 state->id_sched_needed &=
2261 ~IBD_RSRC_RC_TX_LARGEBUF;
2262 mutex_exit(&state->rc_tx_large_bufs_lock);
2263 mutex_exit(&state->id_sched_lock);
2264 state->rc_xmt_buf_mac_update++;
2265 mac_tx_update(state->id_mh);
2266 } else {
2267 state->rc_scq_no_largebuf++;
2268 mutex_exit(&state->rc_tx_large_bufs_lock);
2269 mutex_exit(&state->id_sched_lock);
2270 }
2271 } else if (state->id_sched_needed & IBD_RSRC_SWQE) {
2272 mutex_enter(&state->id_tx_list.dl_mutex);
2273 mutex_enter(&state->id_tx_rel_list.dl_mutex);
2274 if ((state->id_tx_list.dl_cnt +
2275 state->id_tx_rel_list.dl_cnt)
2276 > IBD_FREE_SWQES_THRESH) {
2277 state->id_sched_needed &= ~IBD_RSRC_SWQE;
2278 state->id_sched_cnt++;
2279 mutex_exit(&state->id_tx_rel_list.dl_mutex);
2280 mutex_exit(&state->id_tx_list.dl_mutex);
2281 mutex_exit(&state->id_sched_lock);
2282 mac_tx_update(state->id_mh);
2283 } else {
2284 mutex_exit(&state->id_tx_rel_list.dl_mutex);
2285 mutex_exit(&state->id_tx_list.dl_mutex);
2286 mutex_exit(&state->id_sched_lock);
2287 }
2288 } else {
2289 mutex_exit(&state->id_sched_lock);
2290 }
2291 }
2292 }
2293
2294 /* Send CQ handler, call ibd_rx_tx_cleanup to recycle Tx buffers */
2295 /* ARGSUSED */
2296 static void
ibd_rc_scq_handler(ibt_cq_hdl_t cq_hdl,void * arg)2297 ibd_rc_scq_handler(ibt_cq_hdl_t cq_hdl, void *arg)
2298 {
2299 ibd_rc_chan_t *chan = (ibd_rc_chan_t *)arg;
2300
2301 if (ibd_rc_tx_softintr == 1) {
2302 mutex_enter(&chan->tx_poll_lock);
2303 if (chan->tx_poll_busy & IBD_CQ_POLLING) {
2304 chan->tx_poll_busy |= IBD_REDO_CQ_POLLING;
2305 mutex_exit(&chan->tx_poll_lock);
2306 return;
2307 } else {
2308 mutex_exit(&chan->tx_poll_lock);
2309 ddi_trigger_softintr(chan->scq_softintr);
2310 }
2311 } else
2312 (void) ibd_rc_tx_recycle(arg);
2313 }
2314
2315 static uint_t
ibd_rc_tx_recycle(caddr_t arg)2316 ibd_rc_tx_recycle(caddr_t arg)
2317 {
2318 ibd_rc_chan_t *chan = (ibd_rc_chan_t *)arg;
2319 ibd_state_t *state = chan->state;
2320 int flag, redo_flag;
2321 int redo = 1;
2322
2323 flag = IBD_CQ_POLLING;
2324 redo_flag = IBD_REDO_CQ_POLLING;
2325
2326 mutex_enter(&chan->tx_poll_lock);
2327 if (chan->tx_poll_busy & flag) {
2328 ibd_print_warn(state, "ibd_rc_tx_recycle: multiple polling "
2329 "threads");
2330 chan->tx_poll_busy |= redo_flag;
2331 mutex_exit(&chan->tx_poll_lock);
2332 return (DDI_INTR_CLAIMED);
2333 }
2334 chan->tx_poll_busy |= flag;
2335 mutex_exit(&chan->tx_poll_lock);
2336
2337 /*
2338 * Poll for completed entries; the CQ will not interrupt any
2339 * more for completed packets.
2340 */
2341 ibd_rc_drain_scq(chan, chan->scq_hdl);
2342
2343 /*
2344 * Now enable CQ notifications; all completions originating now
2345 * will cause new interrupts.
2346 */
2347 do {
2348 if (ibt_enable_cq_notify(chan->scq_hdl, IBT_NEXT_COMPLETION) !=
2349 IBT_SUCCESS) {
2350 /*
2351 * We do not expect a failure here.
2352 */
2353 DPRINT(40, "ibd_rc_scq_handler: ibt_enable_cq_notify()"
2354 " failed");
2355 }
2356
2357 ibd_rc_drain_scq(chan, chan->scq_hdl);
2358
2359 mutex_enter(&chan->tx_poll_lock);
2360 if (chan->tx_poll_busy & redo_flag)
2361 chan->tx_poll_busy &= ~redo_flag;
2362 else {
2363 chan->tx_poll_busy &= ~flag;
2364 redo = 0;
2365 }
2366 mutex_exit(&chan->tx_poll_lock);
2367
2368 } while (redo);
2369
2370 return (DDI_INTR_CLAIMED);
2371 }
2372
2373 static ibt_status_t
ibd_register_service(ibt_srv_desc_t * srv,ib_svc_id_t sid,int num_sids,ibt_srv_hdl_t * srv_hdl,ib_svc_id_t * ret_sid)2374 ibd_register_service(ibt_srv_desc_t *srv, ib_svc_id_t sid,
2375 int num_sids, ibt_srv_hdl_t *srv_hdl, ib_svc_id_t *ret_sid)
2376 {
2377 ibd_service_t *p;
2378 ibt_status_t status;
2379
2380 mutex_enter(&ibd_gstate.ig_mutex);
2381 for (p = ibd_gstate.ig_service_list; p != NULL; p = p->is_link) {
2382 if (p->is_sid == sid) {
2383 p->is_ref_cnt++;
2384 *srv_hdl = p->is_srv_hdl;
2385 *ret_sid = sid;
2386 mutex_exit(&ibd_gstate.ig_mutex);
2387 return (IBT_SUCCESS);
2388 }
2389 }
2390 status = ibt_register_service(ibd_gstate.ig_ibt_hdl, srv, sid,
2391 num_sids, srv_hdl, ret_sid);
2392 if (status == IBT_SUCCESS) {
2393 p = kmem_alloc(sizeof (*p), KM_SLEEP);
2394 p->is_srv_hdl = *srv_hdl;
2395 p->is_sid = sid;
2396 p->is_ref_cnt = 1;
2397 p->is_link = ibd_gstate.ig_service_list;
2398 ibd_gstate.ig_service_list = p;
2399 }
2400 mutex_exit(&ibd_gstate.ig_mutex);
2401 return (status);
2402 }
2403
2404 static ibt_status_t
ibd_deregister_service(ibt_srv_hdl_t srv_hdl)2405 ibd_deregister_service(ibt_srv_hdl_t srv_hdl)
2406 {
2407 ibd_service_t *p, **pp;
2408 ibt_status_t status;
2409
2410 mutex_enter(&ibd_gstate.ig_mutex);
2411 for (pp = &ibd_gstate.ig_service_list; *pp != NULL;
2412 pp = &((*pp)->is_link)) {
2413 p = *pp;
2414 if (p->is_srv_hdl == srv_hdl) { /* Found it */
2415 if (--p->is_ref_cnt == 0) {
2416 status = ibt_deregister_service(
2417 ibd_gstate.ig_ibt_hdl, srv_hdl);
2418 *pp = p->is_link; /* link prev to next */
2419 kmem_free(p, sizeof (*p));
2420 } else {
2421 status = IBT_SUCCESS;
2422 }
2423 mutex_exit(&ibd_gstate.ig_mutex);
2424 return (status);
2425 }
2426 }
2427 /* Should not ever get here */
2428 mutex_exit(&ibd_gstate.ig_mutex);
2429 return (IBT_FAILURE);
2430 }
2431
2432 /* Listen with corresponding service ID */
2433 ibt_status_t
ibd_rc_listen(ibd_state_t * state)2434 ibd_rc_listen(ibd_state_t *state)
2435 {
2436 ibt_srv_desc_t srvdesc;
2437 ib_svc_id_t ret_sid;
2438 ibt_status_t status;
2439 ib_gid_t gid;
2440
2441 if (state->rc_listen_hdl != NULL) {
2442 DPRINT(40, "ibd_rc_listen: rc_listen_hdl should be NULL");
2443 return (IBT_FAILURE);
2444 }
2445
2446 bzero(&srvdesc, sizeof (ibt_srv_desc_t));
2447 srvdesc.sd_handler = ibd_rc_dispatch_pass_mad;
2448 srvdesc.sd_flags = IBT_SRV_NO_FLAGS;
2449
2450 /*
2451 * Register the service with service id
2452 * Incoming connection requests should arrive on this service id.
2453 */
2454 status = ibd_register_service(&srvdesc,
2455 IBD_RC_QPN_TO_SID(state->id_qpnum),
2456 1, &state->rc_listen_hdl, &ret_sid);
2457 if (status != IBT_SUCCESS) {
2458 DPRINT(40, "ibd_rc_listen: Service Registration Failed, "
2459 "ret=%d", status);
2460 return (status);
2461 }
2462
2463 gid = state->id_sgid;
2464
2465 /* pass state as cm_private */
2466 status = ibt_bind_service(state->rc_listen_hdl,
2467 gid, NULL, state, &state->rc_listen_bind);
2468 if (status != IBT_SUCCESS) {
2469 DPRINT(40, "ibd_rc_listen:"
2470 " fail to bind port: <%d>", status);
2471 (void) ibd_deregister_service(state->rc_listen_hdl);
2472 return (status);
2473 }
2474
2475 /*
2476 * Legacy OFED had used a wrong service ID (one additional zero digit)
2477 * for many years. To interop with legacy OFED, we support this wrong
2478 * service ID here.
2479 */
2480 ASSERT(state->rc_listen_hdl_OFED_interop == NULL);
2481
2482 bzero(&srvdesc, sizeof (ibt_srv_desc_t));
2483 srvdesc.sd_handler = ibd_rc_dispatch_pass_mad;
2484 srvdesc.sd_flags = IBT_SRV_NO_FLAGS;
2485
2486 /*
2487 * Register the service with service id
2488 * Incoming connection requests should arrive on this service id.
2489 */
2490 status = ibd_register_service(&srvdesc,
2491 IBD_RC_QPN_TO_SID_OFED_INTEROP(state->id_qpnum),
2492 1, &state->rc_listen_hdl_OFED_interop, &ret_sid);
2493 if (status != IBT_SUCCESS) {
2494 DPRINT(40,
2495 "ibd_rc_listen: Service Registration for Legacy OFED "
2496 "Failed %d", status);
2497 (void) ibt_unbind_service(state->rc_listen_hdl,
2498 state->rc_listen_bind);
2499 (void) ibd_deregister_service(state->rc_listen_hdl);
2500 return (status);
2501 }
2502
2503 gid = state->id_sgid;
2504
2505 /* pass state as cm_private */
2506 status = ibt_bind_service(state->rc_listen_hdl_OFED_interop,
2507 gid, NULL, state, &state->rc_listen_bind_OFED_interop);
2508 if (status != IBT_SUCCESS) {
2509 DPRINT(40, "ibd_rc_listen: fail to bind port: <%d> for "
2510 "Legacy OFED listener", status);
2511 (void) ibd_deregister_service(
2512 state->rc_listen_hdl_OFED_interop);
2513 (void) ibt_unbind_service(state->rc_listen_hdl,
2514 state->rc_listen_bind);
2515 (void) ibd_deregister_service(state->rc_listen_hdl);
2516 return (status);
2517 }
2518
2519 return (IBT_SUCCESS);
2520 }
2521
2522 void
ibd_rc_stop_listen(ibd_state_t * state)2523 ibd_rc_stop_listen(ibd_state_t *state)
2524 {
2525 int ret;
2526
2527 /* Disable incoming connection requests */
2528 if (state->rc_listen_hdl != NULL) {
2529 ret = ibt_unbind_all_services(state->rc_listen_hdl);
2530 if (ret != 0) {
2531 DPRINT(40, "ibd_rc_stop_listen:"
2532 "ibt_unbind_all_services() failed, ret=%d", ret);
2533 }
2534 ret = ibd_deregister_service(state->rc_listen_hdl);
2535 if (ret != 0) {
2536 DPRINT(40, "ibd_rc_stop_listen:"
2537 "ibd_deregister_service() failed, ret=%d", ret);
2538 } else {
2539 state->rc_listen_hdl = NULL;
2540 }
2541 }
2542
2543 /* Disable incoming connection requests */
2544 if (state->rc_listen_hdl_OFED_interop != NULL) {
2545 ret = ibt_unbind_all_services(
2546 state->rc_listen_hdl_OFED_interop);
2547 if (ret != 0) {
2548 DPRINT(40, "ibd_rc_stop_listen:"
2549 "ibt_unbind_all_services() failed: %d", ret);
2550 }
2551 ret = ibd_deregister_service(state->rc_listen_hdl_OFED_interop);
2552 if (ret != 0) {
2553 DPRINT(40, "ibd_rc_stop_listen:"
2554 "ibd_deregister_service() failed: %d", ret);
2555 } else {
2556 state->rc_listen_hdl_OFED_interop = NULL;
2557 }
2558 }
2559 }
2560
2561 void
ibd_rc_close_all_chan(ibd_state_t * state)2562 ibd_rc_close_all_chan(ibd_state_t *state)
2563 {
2564 ibd_rc_chan_t *rc_chan;
2565 ibd_ace_t *ace, *pre_ace;
2566 uint_t attempts;
2567
2568 /* Disable all Rx routines */
2569 mutex_enter(&state->rc_pass_chan_list.chan_list_mutex);
2570 rc_chan = state->rc_pass_chan_list.chan_list;
2571 while (rc_chan != NULL) {
2572 ibt_set_cq_handler(rc_chan->rcq_hdl, 0, 0);
2573 rc_chan = rc_chan->next;
2574 }
2575 mutex_exit(&state->rc_pass_chan_list.chan_list_mutex);
2576
2577 if (state->rc_enable_srq) {
2578 attempts = 10;
2579 while (state->rc_srq_rwqe_list.dl_bufs_outstanding > 0) {
2580 DPRINT(30, "ibd_rc_close_all_chan: outstanding > 0");
2581 delay(drv_usectohz(100000));
2582 if (--attempts == 0) {
2583 /*
2584 * There are pending bufs with the network
2585 * layer and we have no choice but to wait
2586 * for them to be done with. Reap all the
2587 * Tx/Rx completions that were posted since
2588 * we turned off the notification and
2589 * return failure.
2590 */
2591 break;
2592 }
2593 }
2594 }
2595
2596 /* Close all passive RC channels */
2597 rc_chan = ibd_rc_rm_header_chan_list(&state->rc_pass_chan_list);
2598 while (rc_chan != NULL) {
2599 (void) ibd_rc_pas_close(rc_chan, B_TRUE, B_FALSE);
2600 rc_chan = ibd_rc_rm_header_chan_list(&state->rc_pass_chan_list);
2601 }
2602
2603 /* Close all active RC channels */
2604 mutex_enter(&state->id_ac_mutex);
2605 state->id_ac_hot_ace = NULL;
2606 ace = list_head(&state->id_ah_active);
2607 while ((pre_ace = ace) != NULL) {
2608 ace = list_next(&state->id_ah_active, ace);
2609 if (pre_ace->ac_chan != NULL) {
2610 INC_REF(pre_ace, 1);
2611 IBD_ACACHE_PULLOUT_ACTIVE(state, pre_ace);
2612 pre_ace->ac_chan->chan_state = IBD_RC_STATE_ACT_CLOSING;
2613 ibd_rc_add_to_chan_list(&state->rc_obs_act_chan_list,
2614 pre_ace->ac_chan);
2615 }
2616 }
2617 mutex_exit(&state->id_ac_mutex);
2618
2619 rc_chan = ibd_rc_rm_header_chan_list(&state->rc_obs_act_chan_list);
2620 while (rc_chan != NULL) {
2621 ace = rc_chan->ace;
2622 ibd_rc_act_close(rc_chan, B_TRUE);
2623 if (ace != NULL) {
2624 mutex_enter(&state->id_ac_mutex);
2625 ASSERT(ace->ac_ref != 0);
2626 atomic_dec_32(&ace->ac_ref);
2627 ace->ac_chan = NULL;
2628 if ((ace->ac_ref == 0) || (ace->ac_ref == CYCLEVAL)) {
2629 IBD_ACACHE_INSERT_FREE(state, ace);
2630 ace->ac_ref = 0;
2631 } else {
2632 ace->ac_ref |= CYCLEVAL;
2633 state->rc_delay_ace_recycle++;
2634 }
2635 mutex_exit(&state->id_ac_mutex);
2636 }
2637 rc_chan = ibd_rc_rm_header_chan_list(
2638 &state->rc_obs_act_chan_list);
2639 }
2640
2641 attempts = 400;
2642 while (((state->rc_num_tx_chan != 0) ||
2643 (state->rc_num_rx_chan != 0)) && (attempts > 0)) {
2644 /* Other thread is closing CM channel, wait it */
2645 delay(drv_usectohz(100000));
2646 attempts--;
2647 }
2648 }
2649
2650 void
ibd_rc_try_connect(ibd_state_t * state,ibd_ace_t * ace,ibt_path_info_t * path)2651 ibd_rc_try_connect(ibd_state_t *state, ibd_ace_t *ace, ibt_path_info_t *path)
2652 {
2653 ibt_status_t status;
2654
2655 if ((state->id_mac_state & IBD_DRV_STARTED) == 0)
2656 return;
2657
2658 status = ibd_rc_connect(state, ace, path,
2659 IBD_RC_SERVICE_ID_OFED_INTEROP);
2660
2661 if (status != IBT_SUCCESS) {
2662 /* wait peer side remove stale channel */
2663 delay(drv_usectohz(10000));
2664 if ((state->id_mac_state & IBD_DRV_STARTED) == 0)
2665 return;
2666 status = ibd_rc_connect(state, ace, path,
2667 IBD_RC_SERVICE_ID_OFED_INTEROP);
2668 }
2669
2670 if (status != IBT_SUCCESS) {
2671 /* wait peer side remove stale channel */
2672 delay(drv_usectohz(10000));
2673 if ((state->id_mac_state & IBD_DRV_STARTED) == 0)
2674 return;
2675 (void) ibd_rc_connect(state, ace, path,
2676 IBD_RC_SERVICE_ID);
2677 }
2678 }
2679
2680 /*
2681 * Allocates channel and sets the ace->ac_chan to it.
2682 * Opens the channel.
2683 */
2684 ibt_status_t
ibd_rc_connect(ibd_state_t * state,ibd_ace_t * ace,ibt_path_info_t * path,uint64_t ietf_cm_service_id)2685 ibd_rc_connect(ibd_state_t *state, ibd_ace_t *ace, ibt_path_info_t *path,
2686 uint64_t ietf_cm_service_id)
2687 {
2688 ibt_status_t status = 0;
2689 ibt_rc_returns_t open_returns;
2690 ibt_chan_open_args_t open_args;
2691 ibd_rc_msg_hello_t hello_req_msg;
2692 ibd_rc_msg_hello_t *hello_ack_msg;
2693 ibd_rc_chan_t *chan;
2694 ibt_ud_dest_query_attr_t dest_attrs;
2695
2696 ASSERT(ace != NULL);
2697 ASSERT(ace->ac_mce == NULL);
2698 ASSERT(ace->ac_chan == NULL);
2699
2700 if ((status = ibd_rc_alloc_chan(&chan, state, B_TRUE)) != IBT_SUCCESS) {
2701 DPRINT(10, "ibd_rc_connect: ibd_rc_alloc_chan() failed");
2702 return (status);
2703 }
2704
2705 ace->ac_chan = chan;
2706 chan->state = state;
2707 chan->ace = ace;
2708
2709 ibt_set_chan_private(chan->chan_hdl, (void *)(uintptr_t)ace);
2710
2711 hello_ack_msg = kmem_zalloc(sizeof (ibd_rc_msg_hello_t), KM_SLEEP);
2712
2713 /*
2714 * open the channels
2715 */
2716 bzero(&open_args, sizeof (ibt_chan_open_args_t));
2717 bzero(&open_returns, sizeof (ibt_rc_returns_t));
2718
2719 open_args.oc_cm_handler = ibd_rc_dispatch_actv_mad;
2720 open_args.oc_cm_clnt_private = (void *)(uintptr_t)ace;
2721
2722 /*
2723 * update path record with the SID
2724 */
2725 if ((status = ibt_query_ud_dest(ace->ac_dest, &dest_attrs))
2726 != IBT_SUCCESS) {
2727 DPRINT(40, "ibd_rc_connect: ibt_query_ud_dest() failed, "
2728 "ret=%d", status);
2729 return (status);
2730 }
2731
2732 path->pi_sid =
2733 ietf_cm_service_id | ((dest_attrs.ud_dst_qpn) & 0xffffff);
2734
2735
2736 /* pre-allocate memory for hello ack message */
2737 open_returns.rc_priv_data_len = sizeof (ibd_rc_msg_hello_t);
2738 open_returns.rc_priv_data = hello_ack_msg;
2739
2740 open_args.oc_path = path;
2741
2742 open_args.oc_path_rnr_retry_cnt = 1;
2743 open_args.oc_path_retry_cnt = 1;
2744
2745 /* We don't do RDMA */
2746 open_args.oc_rdma_ra_out = 0;
2747 open_args.oc_rdma_ra_in = 0;
2748
2749 hello_req_msg.reserved_qpn = htonl(state->id_qpnum);
2750 hello_req_msg.rx_mtu = htonl(state->rc_mtu);
2751 open_args.oc_priv_data_len = sizeof (ibd_rc_msg_hello_t);
2752 open_args.oc_priv_data = (void *)(&hello_req_msg);
2753
2754 ASSERT(open_args.oc_priv_data_len <= IBT_REQ_PRIV_DATA_SZ);
2755 ASSERT(open_returns.rc_priv_data_len <= IBT_REP_PRIV_DATA_SZ);
2756 ASSERT(open_args.oc_cm_handler != NULL);
2757
2758 status = ibt_open_rc_channel(chan->chan_hdl, IBT_OCHAN_NO_FLAGS,
2759 IBT_BLOCKING, &open_args, &open_returns);
2760
2761 if (status == IBT_SUCCESS) {
2762 /* Success! */
2763 DPRINT(2, "ibd_rc_connect: call ibt_open_rc_channel succ!");
2764 state->rc_conn_succ++;
2765 kmem_free(hello_ack_msg, sizeof (ibd_rc_msg_hello_t));
2766 return (IBT_SUCCESS);
2767 }
2768
2769 /* failure */
2770 (void) ibt_flush_channel(chan->chan_hdl);
2771 ibd_rc_free_chan(chan);
2772 ace->ac_chan = NULL;
2773
2774 /* check open_returns report error and exit */
2775 DPRINT(30, "ibd_rc_connect: call ibt_open_rc_chan fail."
2776 "ret status = %d, reason=%d, ace=%p, mtu=0x%x, qpn=0x%x,"
2777 " peer qpn=0x%x", status, (int)open_returns.rc_status, ace,
2778 hello_req_msg.rx_mtu, hello_req_msg.reserved_qpn,
2779 dest_attrs.ud_dst_qpn);
2780 kmem_free(hello_ack_msg, sizeof (ibd_rc_msg_hello_t));
2781 return (status);
2782 }
2783
2784 void
ibd_rc_signal_act_close(ibd_state_t * state,ibd_ace_t * ace)2785 ibd_rc_signal_act_close(ibd_state_t *state, ibd_ace_t *ace)
2786 {
2787 ibd_req_t *req;
2788
2789 req = kmem_cache_alloc(state->id_req_kmc, KM_NOSLEEP);
2790 if (req == NULL) {
2791 ibd_print_warn(state, "ibd_rc_signal_act_close: alloc "
2792 "ibd_req_t fail");
2793 mutex_enter(&state->rc_obs_act_chan_list.chan_list_mutex);
2794 ace->ac_chan->next = state->rc_obs_act_chan_list.chan_list;
2795 state->rc_obs_act_chan_list.chan_list = ace->ac_chan;
2796 mutex_exit(&state->rc_obs_act_chan_list.chan_list_mutex);
2797 } else {
2798 req->rq_ptr = ace->ac_chan;
2799 ibd_queue_work_slot(state, req, IBD_ASYNC_RC_CLOSE_ACT_CHAN);
2800 }
2801 }
2802
2803 void
ibd_rc_signal_ace_recycle(ibd_state_t * state,ibd_ace_t * ace)2804 ibd_rc_signal_ace_recycle(ibd_state_t *state, ibd_ace_t *ace)
2805 {
2806 ibd_req_t *req;
2807
2808 mutex_enter(&state->rc_ace_recycle_lock);
2809 if (state->rc_ace_recycle != NULL) {
2810 mutex_exit(&state->rc_ace_recycle_lock);
2811 return;
2812 }
2813
2814 req = kmem_cache_alloc(state->id_req_kmc, KM_NOSLEEP);
2815 if (req == NULL) {
2816 mutex_exit(&state->rc_ace_recycle_lock);
2817 return;
2818 }
2819
2820 state->rc_ace_recycle = ace;
2821 mutex_exit(&state->rc_ace_recycle_lock);
2822 ASSERT(ace->ac_mce == NULL);
2823 INC_REF(ace, 1);
2824 IBD_ACACHE_PULLOUT_ACTIVE(state, ace);
2825 req->rq_ptr = ace;
2826 ibd_queue_work_slot(state, req, IBD_ASYNC_RC_RECYCLE_ACE);
2827 }
2828
2829 /*
2830 * Close an active channel
2831 *
2832 * is_close_rc_chan: if B_TRUE, we will call ibt_close_rc_channel()
2833 */
2834 static void
ibd_rc_act_close(ibd_rc_chan_t * chan,boolean_t is_close_rc_chan)2835 ibd_rc_act_close(ibd_rc_chan_t *chan, boolean_t is_close_rc_chan)
2836 {
2837 ibd_state_t *state;
2838 ibd_ace_t *ace;
2839 uint_t times;
2840 ibt_status_t ret;
2841
2842 ASSERT(chan != NULL);
2843
2844 chan->state->rc_act_close++;
2845 switch (chan->chan_state) {
2846 case IBD_RC_STATE_ACT_CLOSING: /* stale, close it */
2847 case IBD_RC_STATE_ACT_ESTAB:
2848 DPRINT(30, "ibd_rc_act_close-1: close and free chan, "
2849 "act_state=%d, chan=%p", chan->chan_state, chan);
2850 chan->chan_state = IBD_RC_STATE_ACT_CLOSED;
2851 ibt_set_cq_handler(chan->rcq_hdl, 0, 0);
2852 /*
2853 * Wait send queue empty. Its old value is 50 (5 seconds). But
2854 * in my experiment, 5 seconds is not enough time to let IBTL
2855 * return all buffers and ace->ac_ref. I tried 25 seconds, it
2856 * works well. As another evidence, I saw IBTL takes about 17
2857 * seconds every time it cleans a stale RC channel.
2858 */
2859 times = 250;
2860 ace = chan->ace;
2861 ASSERT(ace != NULL);
2862 state = chan->state;
2863 ASSERT(state != NULL);
2864 mutex_enter(&state->id_ac_mutex);
2865 mutex_enter(&chan->tx_wqe_list.dl_mutex);
2866 mutex_enter(&chan->tx_rel_list.dl_mutex);
2867 while (((chan->tx_wqe_list.dl_cnt + chan->tx_rel_list.dl_cnt)
2868 != chan->scq_size) || ((ace->ac_ref != 1) &&
2869 (ace->ac_ref != (CYCLEVAL+1)))) {
2870 mutex_exit(&chan->tx_rel_list.dl_mutex);
2871 mutex_exit(&chan->tx_wqe_list.dl_mutex);
2872 mutex_exit(&state->id_ac_mutex);
2873 times--;
2874 if (times == 0) {
2875 state->rc_act_close_not_clean++;
2876 DPRINT(40, "ibd_rc_act_close: dl_cnt(tx_wqe_"
2877 "list=%d, tx_rel_list=%d) != chan->"
2878 "scq_size=%d, OR ac_ref(=%d) not clean",
2879 chan->tx_wqe_list.dl_cnt,
2880 chan->tx_rel_list.dl_cnt,
2881 chan->scq_size, ace->ac_ref);
2882 break;
2883 }
2884 mutex_enter(&chan->tx_poll_lock);
2885 if (chan->tx_poll_busy & IBD_CQ_POLLING) {
2886 DPRINT(40, "ibd_rc_act_close: multiple "
2887 "polling threads");
2888 mutex_exit(&chan->tx_poll_lock);
2889 } else {
2890 chan->tx_poll_busy = IBD_CQ_POLLING;
2891 mutex_exit(&chan->tx_poll_lock);
2892 ibd_rc_drain_scq(chan, chan->scq_hdl);
2893 mutex_enter(&chan->tx_poll_lock);
2894 chan->tx_poll_busy = 0;
2895 mutex_exit(&chan->tx_poll_lock);
2896 }
2897 delay(drv_usectohz(100000));
2898 mutex_enter(&state->id_ac_mutex);
2899 mutex_enter(&chan->tx_wqe_list.dl_mutex);
2900 mutex_enter(&chan->tx_rel_list.dl_mutex);
2901 }
2902 if (times != 0) {
2903 mutex_exit(&chan->tx_rel_list.dl_mutex);
2904 mutex_exit(&chan->tx_wqe_list.dl_mutex);
2905 mutex_exit(&state->id_ac_mutex);
2906 }
2907
2908 ibt_set_cq_handler(chan->scq_hdl, 0, 0);
2909 if (is_close_rc_chan) {
2910 ret = ibt_close_rc_channel(chan->chan_hdl,
2911 IBT_BLOCKING|IBT_NOCALLBACKS, NULL, 0, NULL, NULL,
2912 0);
2913 if (ret != IBT_SUCCESS) {
2914 DPRINT(40, "ibd_rc_act_close: ibt_close_rc_"
2915 "channel fail, chan=%p, ret=%d",
2916 chan, ret);
2917 } else {
2918 DPRINT(30, "ibd_rc_act_close: ibt_close_rc_"
2919 "channel succ, chan=%p", chan);
2920 }
2921 }
2922
2923 ibd_rc_free_chan(chan);
2924 break;
2925 case IBD_RC_STATE_ACT_REP_RECV:
2926 chan->chan_state = IBD_RC_STATE_ACT_CLOSED;
2927 (void) ibt_flush_channel(chan->chan_hdl);
2928 ibd_rc_free_chan(chan);
2929 break;
2930 case IBD_RC_STATE_ACT_ERROR:
2931 DPRINT(40, "ibd_rc_act_close: IBD_RC_STATE_ERROR branch");
2932 break;
2933 default:
2934 DPRINT(40, "ibd_rc_act_close: default branch, act_state=%d, "
2935 "chan=%p", chan->chan_state, chan);
2936 }
2937 }
2938
2939 /*
2940 * Close a passive channel
2941 *
2942 * is_close_rc_chan: if B_TRUE, we will call ibt_close_rc_channel()
2943 *
2944 * is_timeout_close: if B_TRUE, this function is called by the connection
2945 * reaper (refer to function ibd_rc_conn_timeout_call). When the connection
2946 * reaper calls ibd_rc_pas_close(), and if it finds that dl_bufs_outstanding
2947 * or chan->rcq_invoking is non-zero, then it can simply put that channel back
2948 * on the passive channels list and move on, since it might be an indication
2949 * that the channel became active again by the time we started it's cleanup.
2950 * It is costlier to do the cleanup and then reinitiate the channel
2951 * establishment and hence it will help to be conservative when we do the
2952 * cleanup.
2953 */
2954 int
ibd_rc_pas_close(ibd_rc_chan_t * chan,boolean_t is_close_rc_chan,boolean_t is_timeout_close)2955 ibd_rc_pas_close(ibd_rc_chan_t *chan, boolean_t is_close_rc_chan,
2956 boolean_t is_timeout_close)
2957 {
2958 uint_t times;
2959 ibt_status_t ret;
2960
2961 ASSERT(chan != NULL);
2962 chan->state->rc_pas_close++;
2963
2964 switch (chan->chan_state) {
2965 case IBD_RC_STATE_PAS_ESTAB:
2966 if (is_timeout_close) {
2967 if ((chan->rcq_invoking != 0) ||
2968 ((!chan->state->rc_enable_srq) &&
2969 (chan->rx_wqe_list.dl_bufs_outstanding > 0))) {
2970 if (ibd_rc_re_add_to_pas_chan_list(chan)) {
2971 return (DDI_FAILURE);
2972 }
2973 }
2974 }
2975 /*
2976 * First, stop receive interrupts; this stops the
2977 * connection from handing up buffers to higher layers.
2978 * Wait for receive buffers to be returned; give up
2979 * after 5 seconds.
2980 */
2981 ibt_set_cq_handler(chan->rcq_hdl, 0, 0);
2982 /* Wait 0.01 second to let ibt_set_cq_handler() take effect */
2983 delay(drv_usectohz(10000));
2984 if (!chan->state->rc_enable_srq) {
2985 times = 50;
2986 while (chan->rx_wqe_list.dl_bufs_outstanding > 0) {
2987 delay(drv_usectohz(100000));
2988 if (--times == 0) {
2989 DPRINT(40, "ibd_rc_pas_close : "
2990 "reclaiming failed");
2991 ibd_rc_poll_rcq(chan, chan->rcq_hdl);
2992 ibt_set_cq_handler(chan->rcq_hdl,
2993 ibd_rc_rcq_handler,
2994 (void *)(uintptr_t)chan);
2995 return (DDI_FAILURE);
2996 }
2997 }
2998 }
2999 times = 50;
3000 while (chan->rcq_invoking != 0) {
3001 delay(drv_usectohz(100000));
3002 if (--times == 0) {
3003 DPRINT(40, "ibd_rc_pas_close : "
3004 "rcq handler is being invoked");
3005 chan->state->rc_pas_close_rcq_invoking++;
3006 break;
3007 }
3008 }
3009 ibt_set_cq_handler(chan->scq_hdl, 0, 0);
3010 chan->chan_state = IBD_RC_STATE_PAS_CLOSED;
3011 DPRINT(30, "ibd_rc_pas_close-1: close and free chan, "
3012 "chan_state=%d, chan=%p", chan->chan_state, chan);
3013 if (is_close_rc_chan) {
3014 ret = ibt_close_rc_channel(chan->chan_hdl,
3015 IBT_BLOCKING|IBT_NOCALLBACKS, NULL, 0, NULL, NULL,
3016 0);
3017 if (ret != IBT_SUCCESS) {
3018 DPRINT(40, "ibd_rc_pas_close: ibt_close_rc_"
3019 "channel() fail, chan=%p, ret=%d", chan,
3020 ret);
3021 } else {
3022 DPRINT(30, "ibd_rc_pas_close: ibt_close_rc_"
3023 "channel() succ, chan=%p", chan);
3024 }
3025 }
3026 ibd_rc_free_chan(chan);
3027 break;
3028 case IBD_RC_STATE_PAS_REQ_RECV:
3029 chan->chan_state = IBD_RC_STATE_PAS_CLOSED;
3030 (void) ibt_flush_channel(chan->chan_hdl);
3031 ibd_rc_free_chan(chan);
3032 break;
3033 default:
3034 DPRINT(40, "ibd_rc_pas_close: default, chan_state=%d, chan=%p",
3035 chan->chan_state, chan);
3036 }
3037 return (DDI_SUCCESS);
3038 }
3039
3040 /*
3041 * Passive Side:
3042 * Handle an incoming CM REQ from active side.
3043 *
3044 * If success, this function allocates an ibd_rc_chan_t, then
3045 * assigns it to "*ret_conn".
3046 */
3047 static ibt_cm_status_t
ibd_rc_handle_req(void * arg,ibd_rc_chan_t ** ret_conn,ibt_cm_event_t * ibt_cm_event,ibt_cm_return_args_t * ret_args,void * ret_priv_data)3048 ibd_rc_handle_req(void *arg, ibd_rc_chan_t **ret_conn,
3049 ibt_cm_event_t *ibt_cm_event, ibt_cm_return_args_t *ret_args,
3050 void *ret_priv_data)
3051 {
3052 ibd_rc_msg_hello_t *hello_msg;
3053 ibd_state_t *state = (ibd_state_t *)arg;
3054 ibd_rc_chan_t *chan;
3055
3056 if (ibd_rc_alloc_chan(&chan, state, B_FALSE) != IBT_SUCCESS) {
3057 DPRINT(40, "ibd_rc_handle_req: ibd_rc_alloc_chan() failed");
3058 return (IBT_CM_REJECT);
3059 }
3060
3061 ibd_rc_add_to_chan_list(&state->rc_pass_chan_list, chan);
3062
3063 ibt_set_chan_private(chan->chan_hdl, (void *)(uintptr_t)chan);
3064
3065 if (!state->rc_enable_srq) {
3066 if (ibd_rc_init_rxlist(chan) != DDI_SUCCESS) {
3067 ibd_rc_free_chan(chan);
3068 DPRINT(40, "ibd_rc_handle_req: ibd_rc_init_rxlist() "
3069 "failed");
3070 return (IBT_CM_REJECT);
3071 }
3072 }
3073
3074 ret_args->cm_ret.rep.cm_channel = chan->chan_hdl;
3075
3076 /* We don't do RDMA */
3077 ret_args->cm_ret.rep.cm_rdma_ra_out = 0;
3078 ret_args->cm_ret.rep.cm_rdma_ra_in = 0;
3079
3080 ret_args->cm_ret.rep.cm_rnr_retry_cnt = 7;
3081 ret_args->cm_ret_len = sizeof (ibd_rc_msg_hello_t);
3082
3083 hello_msg = (ibd_rc_msg_hello_t *)ibt_cm_event->cm_priv_data;
3084 DPRINT(30, "ibd_rc_handle_req(): peer qpn=0x%x, peer mtu=0x%x",
3085 ntohl(hello_msg->reserved_qpn), ntohl(hello_msg->rx_mtu));
3086
3087 hello_msg = (ibd_rc_msg_hello_t *)ret_priv_data;
3088 hello_msg->reserved_qpn = htonl(state->id_qpnum);
3089 hello_msg->rx_mtu = htonl(state->rc_mtu);
3090
3091 chan->chan_state = IBD_RC_STATE_PAS_REQ_RECV; /* ready to receive */
3092 *ret_conn = chan;
3093
3094 return (IBT_CM_ACCEPT);
3095 }
3096
3097 /*
3098 * ibd_rc_handle_act_estab -- handler for connection established completion
3099 * for active side.
3100 */
3101 static ibt_cm_status_t
ibd_rc_handle_act_estab(ibd_ace_t * ace)3102 ibd_rc_handle_act_estab(ibd_ace_t *ace)
3103 {
3104 ibt_status_t result;
3105
3106 switch (ace->ac_chan->chan_state) {
3107 case IBD_RC_STATE_ACT_REP_RECV:
3108 ace->ac_chan->chan_state = IBD_RC_STATE_ACT_ESTAB;
3109 result = ibt_enable_cq_notify(ace->ac_chan->rcq_hdl,
3110 IBT_NEXT_COMPLETION);
3111 if (result != IBT_SUCCESS) {
3112 DPRINT(40, "ibd_rc_handle_act_estab: "
3113 "ibt_enable_cq_notify(rcq) "
3114 "failed: status %d", result);
3115 return (IBT_CM_REJECT);
3116 }
3117 break;
3118 default:
3119 DPRINT(40, "ibd_rc_handle_act_estab: default "
3120 "branch, act_state=%d", ace->ac_chan->chan_state);
3121 return (IBT_CM_REJECT);
3122 }
3123 return (IBT_CM_ACCEPT);
3124 }
3125
3126 /*
3127 * ibd_rc_handle_pas_estab -- handler for connection established completion
3128 * for passive side.
3129 */
3130 static ibt_cm_status_t
ibd_rc_handle_pas_estab(ibd_rc_chan_t * chan)3131 ibd_rc_handle_pas_estab(ibd_rc_chan_t *chan)
3132 {
3133 ibt_status_t result;
3134
3135 switch (chan->chan_state) {
3136 case IBD_RC_STATE_PAS_REQ_RECV:
3137 chan->chan_state = IBD_RC_STATE_PAS_ESTAB;
3138
3139 result = ibt_enable_cq_notify(chan->rcq_hdl,
3140 IBT_NEXT_COMPLETION);
3141 if (result != IBT_SUCCESS) {
3142 DPRINT(40, "ibd_rc_handle_pas_estab: "
3143 "ibt_enable_cq_notify(rcq) "
3144 "failed: status %d", result);
3145 return (IBT_CM_REJECT);
3146 }
3147 break;
3148 default:
3149 DPRINT(40, "ibd_rc_handle_pas_estab: default "
3150 "branch, chan_state=%d", chan->chan_state);
3151 return (IBT_CM_REJECT);
3152 }
3153 return (IBT_CM_ACCEPT);
3154 }
3155
3156 /* ARGSUSED */
3157 static ibt_cm_status_t
ibd_rc_dispatch_actv_mad(void * arg,ibt_cm_event_t * ibt_cm_event,ibt_cm_return_args_t * ret_args,void * ret_priv_data,ibt_priv_data_len_t ret_len_max)3158 ibd_rc_dispatch_actv_mad(void *arg, ibt_cm_event_t *ibt_cm_event,
3159 ibt_cm_return_args_t *ret_args, void *ret_priv_data,
3160 ibt_priv_data_len_t ret_len_max)
3161 {
3162 ibt_cm_status_t result = IBT_CM_ACCEPT;
3163 ibd_ace_t *ace = (ibd_ace_t *)(uintptr_t)arg;
3164 ibd_rc_chan_t *rc_chan;
3165 ibd_state_t *state;
3166 ibd_rc_msg_hello_t *hello_ack;
3167
3168 switch (ibt_cm_event->cm_type) {
3169 case IBT_CM_EVENT_REP_RCV:
3170 ASSERT(ace->ac_chan != NULL);
3171 ASSERT(ace->ac_chan->chan_state == IBD_RC_STATE_INIT);
3172 hello_ack = (ibd_rc_msg_hello_t *)ibt_cm_event->cm_priv_data;
3173 DPRINT(30, "ibd_rc_handle_rep: hello_ack->mtu=0x%x, "
3174 "hello_ack->qpn=0x%x", ntohl(hello_ack->rx_mtu),
3175 ntohl(hello_ack->reserved_qpn));
3176 ace->ac_chan->chan_state = IBD_RC_STATE_ACT_REP_RECV;
3177 break;
3178
3179 case IBT_CM_EVENT_CONN_EST:
3180 ASSERT(ace->ac_chan != NULL);
3181 DPRINT(30, "ibd_rc_dispatch_actv_mad: IBT_CM_EVENT_CONN_EST, "
3182 "ace=%p, act_state=%d, chan=%p",
3183 ace, ace->ac_chan->chan_state, ace->ac_chan);
3184 result = ibd_rc_handle_act_estab(ace);
3185 break;
3186
3187 case IBT_CM_EVENT_CONN_CLOSED:
3188 rc_chan = ace->ac_chan;
3189 if (rc_chan == NULL) {
3190 DPRINT(40, "ibd_rc_dispatch_actv_mad: "
3191 "rc_chan==NULL, IBT_CM_EVENT_CONN_CLOSED");
3192 return (IBT_CM_ACCEPT);
3193 }
3194 state = rc_chan->state;
3195 mutex_enter(&state->id_ac_mutex);
3196 if ((rc_chan->chan_state == IBD_RC_STATE_ACT_ESTAB) &&
3197 ((ace = ibd_acache_find(state, &ace->ac_mac, B_FALSE, 0))
3198 != NULL) && (ace == rc_chan->ace)) {
3199 rc_chan->chan_state = IBD_RC_STATE_ACT_CLOSING;
3200 ASSERT(ace->ac_mce == NULL);
3201 INC_REF(ace, 1);
3202 IBD_ACACHE_PULLOUT_ACTIVE(state, ace);
3203 mutex_exit(&state->id_ac_mutex);
3204 DPRINT(30, "ibd_rc_dispatch_actv_mad: "
3205 "IBT_CM_EVENT_CONN_CLOSED, ace=%p, chan=%p, "
3206 "reason=%d", ace, rc_chan,
3207 ibt_cm_event->cm_event.closed);
3208 } else {
3209 mutex_exit(&state->id_ac_mutex);
3210 state->rc_act_close_simultaneous++;
3211 DPRINT(40, "ibd_rc_dispatch_actv_mad: other thread "
3212 "is closing it, IBT_CM_EVENT_CONN_CLOSED, "
3213 "chan_state=%d", rc_chan->chan_state);
3214 return (IBT_CM_ACCEPT);
3215 }
3216 ibd_rc_act_close(rc_chan, B_FALSE);
3217 mutex_enter(&state->id_ac_mutex);
3218 ace->ac_chan = NULL;
3219 ASSERT(ace->ac_ref != 0);
3220 atomic_dec_32(&ace->ac_ref);
3221 if ((ace->ac_ref == 0) || (ace->ac_ref == CYCLEVAL)) {
3222 IBD_ACACHE_INSERT_FREE(state, ace);
3223 ace->ac_ref = 0;
3224 } else {
3225 ace->ac_ref |= CYCLEVAL;
3226 state->rc_delay_ace_recycle++;
3227 }
3228 mutex_exit(&state->id_ac_mutex);
3229 break;
3230
3231 case IBT_CM_EVENT_FAILURE:
3232 DPRINT(30, "ibd_rc_dispatch_actv_mad: IBT_CM_EVENT_FAILURE,"
3233 "ace=%p, chan=%p, code: %d, msg: %d, reason=%d",
3234 ace, ace->ac_chan,
3235 ibt_cm_event->cm_event.failed.cf_code,
3236 ibt_cm_event->cm_event.failed.cf_msg,
3237 ibt_cm_event->cm_event.failed.cf_reason);
3238 /*
3239 * Don't need free resource here. The resource is freed
3240 * at function ibd_rc_connect()
3241 */
3242 break;
3243
3244 case IBT_CM_EVENT_MRA_RCV:
3245 DPRINT(40, "ibd_rc_dispatch_actv_mad: IBT_CM_EVENT_MRA_RCV");
3246 break;
3247 case IBT_CM_EVENT_LAP_RCV:
3248 DPRINT(40, "ibd_rc_dispatch_actv_mad: LAP message received");
3249 break;
3250 case IBT_CM_EVENT_APR_RCV:
3251 DPRINT(40, "ibd_rc_dispatch_actv_mad: APR message received");
3252 break;
3253 default:
3254 DPRINT(40, "ibd_rc_dispatch_actv_mad: default branch, "
3255 "ibt_cm_event->cm_type=%d", ibt_cm_event->cm_type);
3256 break;
3257 }
3258
3259 return (result);
3260 }
3261
3262 /* ARGSUSED */
3263 static ibt_cm_status_t
ibd_rc_dispatch_pass_mad(void * arg,ibt_cm_event_t * ibt_cm_event,ibt_cm_return_args_t * ret_args,void * ret_priv_data,ibt_priv_data_len_t ret_len_max)3264 ibd_rc_dispatch_pass_mad(void *arg, ibt_cm_event_t *ibt_cm_event,
3265 ibt_cm_return_args_t *ret_args, void *ret_priv_data,
3266 ibt_priv_data_len_t ret_len_max)
3267 {
3268 ibt_cm_status_t result = IBT_CM_ACCEPT;
3269 ibd_rc_chan_t *chan;
3270
3271 if (ibt_cm_event->cm_type == IBT_CM_EVENT_REQ_RCV) {
3272 DPRINT(30, "ibd_rc_dispatch_pass_mad: IBT_CM_EVENT_REQ_RCV,"
3273 "req_pkey=%x", ibt_cm_event->cm_event.req.req_pkey);
3274 /* Receive an incoming CM REQ from active side */
3275 result = ibd_rc_handle_req(arg, &chan, ibt_cm_event, ret_args,
3276 ret_priv_data);
3277 return (result);
3278 }
3279
3280 if (ibt_cm_event->cm_channel == 0) {
3281 DPRINT(30, "ibd_rc_dispatch_pass_mad: "
3282 "ERROR ibt_cm_event->cm_channel == 0");
3283 return (IBT_CM_REJECT);
3284 }
3285
3286 chan =
3287 (ibd_rc_chan_t *)ibt_get_chan_private(ibt_cm_event->cm_channel);
3288 if (chan == NULL) {
3289 DPRINT(40, "ibd_rc_dispatch_pass_mad: conn == 0");
3290 return (IBT_CM_REJECT);
3291 }
3292
3293 switch (ibt_cm_event->cm_type) {
3294 case IBT_CM_EVENT_CONN_EST:
3295 DPRINT(30, "ibd_rc_dispatch_pass_mad: IBT_CM_EVENT_CONN_EST, "
3296 "chan=%p", chan);
3297 result = ibd_rc_handle_pas_estab(chan);
3298 break;
3299 case IBT_CM_EVENT_CONN_CLOSED:
3300 DPRINT(30, "ibd_rc_dispatch_pass_mad: IBT_CM_EVENT_CONN_CLOSED,"
3301 " chan=%p, reason=%d", chan, ibt_cm_event->cm_event.closed);
3302 chan = ibd_rc_rm_from_chan_list(&chan->state->rc_pass_chan_list,
3303 chan);
3304 if (chan != NULL)
3305 (void) ibd_rc_pas_close(chan, B_FALSE, B_FALSE);
3306 break;
3307 case IBT_CM_EVENT_FAILURE:
3308 DPRINT(30, "ibd_rc_dispatch_pass_mad: IBT_CM_EVENT_FAILURE,"
3309 " chan=%p, code: %d, msg: %d, reason=%d", chan,
3310 ibt_cm_event->cm_event.failed.cf_code,
3311 ibt_cm_event->cm_event.failed.cf_msg,
3312 ibt_cm_event->cm_event.failed.cf_reason);
3313 chan = ibd_rc_rm_from_chan_list(&chan->state->rc_pass_chan_list,
3314 chan);
3315 if (chan != NULL)
3316 (void) ibd_rc_pas_close(chan, B_FALSE, B_FALSE);
3317 return (IBT_CM_ACCEPT);
3318 case IBT_CM_EVENT_MRA_RCV:
3319 DPRINT(40, "ibd_rc_dispatch_pass_mad: IBT_CM_EVENT_MRA_RCV");
3320 break;
3321 case IBT_CM_EVENT_LAP_RCV:
3322 DPRINT(40, "ibd_rc_dispatch_pass_mad: LAP message received");
3323 break;
3324 case IBT_CM_EVENT_APR_RCV:
3325 DPRINT(40, "ibd_rc_dispatch_pass_mad: APR message received");
3326 break;
3327 default:
3328 DPRINT(40, "ibd_rc_dispatch_pass_mad: default, type=%d, "
3329 "chan=%p", ibt_cm_event->cm_type, chan);
3330 break;
3331 }
3332
3333 return (result);
3334 }
3335