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 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * tavor_wr.c
29 * Tavor Work Request Processing Routines
30 *
31 * Implements all the routines necessary to provide the PostSend(),
32 * PostRecv() and PostSRQ() verbs. Also contains all the code
33 * necessary to implement the Tavor WRID tracking mechanism.
34 */
35
36 #include <sys/types.h>
37 #include <sys/conf.h>
38 #include <sys/ddi.h>
39 #include <sys/sunddi.h>
40 #include <sys/modctl.h>
41 #include <sys/avl.h>
42
43 #include <sys/ib/adapters/tavor/tavor.h>
44
45 static void tavor_qp_send_doorbell(tavor_state_t *state, uint32_t nda,
46 uint32_t nds, uint32_t qpn, uint32_t fence, uint32_t nopcode);
47 #pragma inline(tavor_qp_send_doorbell)
48 static void tavor_qp_recv_doorbell(tavor_state_t *state, uint32_t nda,
49 uint32_t nds, uint32_t qpn, uint32_t credits);
50 #pragma inline(tavor_qp_recv_doorbell)
51 static uint32_t tavor_wr_get_immediate(ibt_send_wr_t *wr);
52 static int tavor_wr_bind_check(tavor_state_t *state, ibt_send_wr_t *wr);
53 static int tavor_wqe_send_build(tavor_state_t *state, tavor_qphdl_t qp,
54 ibt_send_wr_t *wr, uint64_t *desc, uint_t *size);
55 static void tavor_wqe_send_linknext(ibt_send_wr_t *curr_wr,
56 ibt_send_wr_t *prev_wr, uint64_t *curr_desc, uint_t curr_descsz,
57 uint64_t *prev_desc, tavor_sw_wqe_dbinfo_t *dbinfo, tavor_qphdl_t qp);
58 static int tavor_wqe_mlx_build(tavor_state_t *state, tavor_qphdl_t qp,
59 ibt_send_wr_t *wr, uint64_t *desc, uint_t *size);
60 static void tavor_wqe_mlx_linknext(ibt_send_wr_t *prev_wr, uint64_t *curr_desc,
61 uint_t curr_descsz, uint64_t *prev_desc, tavor_sw_wqe_dbinfo_t *dbinfo,
62 tavor_qphdl_t qp);
63 static int tavor_wqe_recv_build(tavor_state_t *state, tavor_qphdl_t qp,
64 ibt_recv_wr_t *wr, uint64_t *desc, uint_t *size);
65 static void tavor_wqe_recv_linknext(uint64_t *desc, uint_t desc_sz,
66 uint64_t *prev, tavor_qphdl_t qp);
67 static int tavor_wqe_srq_build(tavor_state_t *state, tavor_srqhdl_t srq,
68 ibt_recv_wr_t *wr, uint64_t *desc);
69 static void tavor_wqe_srq_linknext(uint64_t *desc, uint64_t *prev,
70 tavor_srqhdl_t srq);
71 static void tavor_wqe_sync(void *hdl, uint_t sync_from,
72 uint_t sync_to, uint_t sync_type, uint_t flag);
73 static tavor_wrid_entry_t *tavor_wrid_find_match(tavor_workq_hdr_t *wq,
74 tavor_cqhdl_t cq, tavor_hw_cqe_t *cqe);
75 static void tavor_wrid_reaplist_add(tavor_cqhdl_t cq, tavor_workq_hdr_t *wq);
76 static tavor_workq_hdr_t *tavor_wrid_wqhdr_find(tavor_cqhdl_t cq, uint_t qpn,
77 uint_t send_or_recv);
78 static tavor_workq_hdr_t *tavor_wrid_wqhdr_create(tavor_state_t *state,
79 tavor_cqhdl_t cq, uint_t qpn, uint_t wq_type, uint_t create_wql);
80 static uint32_t tavor_wrid_get_wqeaddrsz(tavor_workq_hdr_t *wq);
81 static void tavor_wrid_wqhdr_add(tavor_workq_hdr_t *wqhdr,
82 tavor_wrid_list_hdr_t *wrid_list);
83 static void tavor_wrid_wqhdr_remove(tavor_workq_hdr_t *wqhdr,
84 tavor_wrid_list_hdr_t *wrid_list);
85 static tavor_workq_hdr_t *tavor_wrid_list_reap(tavor_wrid_list_hdr_t *wq);
86 static void tavor_wrid_wqhdr_lock_both(tavor_qphdl_t qp);
87 static void tavor_wrid_wqhdr_unlock_both(tavor_qphdl_t qp);
88 static void tavor_cq_wqhdr_add(tavor_cqhdl_t cq, tavor_workq_hdr_t *wqhdr);
89 static void tavor_cq_wqhdr_remove(tavor_cqhdl_t cq, tavor_workq_hdr_t *wqhdr);
90
91 /*
92 * tavor_post_send()
93 * Context: Can be called from interrupt or base context.
94 */
95 int
96 tavor_post_send(tavor_state_t *state, tavor_qphdl_t qp,
97 ibt_send_wr_t *wr, uint_t num_wr, uint_t *num_posted)
98 {
99 tavor_sw_wqe_dbinfo_t dbinfo;
100 tavor_wrid_list_hdr_t *wridlist;
101 tavor_wrid_entry_t *wre_last;
102 uint64_t *desc, *prev, *first;
103 uint32_t desc_sz, first_sz;
104 uint32_t wqeaddrsz, signaled_dbd;
105 uint32_t head, tail, next_tail, qsize_msk;
106 uint32_t sync_from, sync_to;
107 uint_t currindx, wrindx, numremain;
108 uint_t chainlen, chainbegin, posted_cnt;
109 uint_t maxdb = TAVOR_QP_MAXDESC_PER_DB;
110 int status;
111
112 TAVOR_TNF_ENTER(tavor_post_send);
113
114 /*
115 * Check for user-mappable QP memory. Note: We do not allow kernel
116 * clients to post to QP memory that is accessible directly by the
117 * user. If the QP memory is user accessible, then return an error.
118 */
119 if (qp->qp_is_umap) {
120 TNF_PROBE_0(tavor_post_send_inv_usrmapped_type,
121 TAVOR_TNF_ERROR, "");
122 TAVOR_TNF_EXIT(tavor_post_send);
123 return (IBT_QP_HDL_INVALID);
124 }
125
126 /* Initialize posted_cnt */
127 posted_cnt = 0;
128
129 mutex_enter(&qp->qp_lock);
130
131 /*
132 * Check QP state. Can not post Send requests from the "Reset",
133 * "Init", or "RTR" states
134 */
135 if ((qp->qp_state == TAVOR_QP_RESET) ||
136 (qp->qp_state == TAVOR_QP_INIT) ||
137 (qp->qp_state == TAVOR_QP_RTR)) {
138 mutex_exit(&qp->qp_lock);
139 TNF_PROBE_0(tavor_post_send_inv_qpstate_fail,
140 TAVOR_TNF_ERROR, "");
141 TAVOR_TNF_EXIT(tavor_post_send);
142 return (IBT_QP_STATE_INVALID);
143 }
144
145 /* Grab the lock for the WRID list */
146 mutex_enter(&qp->qp_sq_wqhdr->wq_wrid_wql->wql_lock);
147 wridlist = qp->qp_sq_wqhdr->wq_wrid_post;
148
149 /* Save away some initial QP state */
150 qsize_msk = qp->qp_sq_wqhdr->wq_size - 1;
151 tail = qp->qp_sq_wqhdr->wq_tail;
152 head = qp->qp_sq_wqhdr->wq_head;
153
154 /*
155 * For each ibt_send_wr_t in the wr[] list passed in, parse the
156 * request and build a Send WQE. Note: Because we are potentially
157 * building a chain of WQEs, we want to link them all together.
158 * However, we do not want to link the first one to the previous
159 * WQE until the entire chain has been linked. Then in the last
160 * step we ring the appropriate doorbell. Note: It is possible for
161 * more Work Requests to be posted than the HW will support at one
162 * shot. If this happens, we need to be able to post and ring
163 * several chains here until the the entire request is complete.
164 */
165 wrindx = 0;
166 numremain = num_wr;
167 status = DDI_SUCCESS;
168 while ((wrindx < num_wr) && (status == DDI_SUCCESS)) {
169 /*
170 * For the first WQE on a new chain we need "prev" to point
171 * to the current descriptor. As we begin to process
172 * further, "prev" will be updated to point to the previous
173 * WQE on the current chain (see below).
174 */
175 prev = TAVOR_QP_SQ_ENTRY(qp, tail);
176
177 /*
178 * Before we begin, save the current "tail index" for later
179 * DMA sync
180 */
181 sync_from = tail;
182
183 /*
184 * Break the request up into chains that are less than or
185 * equal to the maximum number of WQEs that can be posted
186 * per doorbell ring
187 */
188 chainlen = (numremain > maxdb) ? maxdb : numremain;
189 numremain -= chainlen;
190 chainbegin = wrindx;
191 for (currindx = 0; currindx < chainlen; currindx++, wrindx++) {
192 /*
193 * Check for "queue full" condition. If the queue
194 * is already full, then no more WQEs can be posted.
195 * So break out, ring a doorbell (if necessary) and
196 * return an error
197 */
198 if (qp->qp_sq_wqhdr->wq_full != 0) {
199 status = IBT_QP_FULL;
200 TNF_PROBE_0_DEBUG(tavor_post_send_sqfull,
201 TAVOR_TNF_TRACE, "");
202 break;
203 }
204
205 /*
206 * Increment the "tail index" and check for "queue
207 * full" condition. If we detect that the current
208 * work request is going to fill the work queue, then
209 * we mark this condition and continue.
210 */
211 next_tail = (tail + 1) & qsize_msk;
212 if (next_tail == head) {
213 qp->qp_sq_wqhdr->wq_full = 1;
214 }
215
216 /*
217 * Get the address of the location where the next
218 * Send WQE should be built
219 */
220 desc = TAVOR_QP_SQ_ENTRY(qp, tail);
221
222 /*
223 * Call tavor_wqe_send_build() to build the WQE
224 * at the given address. This routine uses the
225 * information in the ibt_send_wr_t list (wr[]) and
226 * returns the size of the WQE when it returns.
227 */
228 status = tavor_wqe_send_build(state, qp,
229 &wr[wrindx], desc, &desc_sz);
230 if (status != DDI_SUCCESS) {
231 TNF_PROBE_0(tavor_post_send_bldwqe_fail,
232 TAVOR_TNF_ERROR, "");
233 break;
234 }
235
236 /*
237 * Add a WRID entry to the WRID list. Need to
238 * calculate the "wqeaddrsz" and "signaled_dbd"
239 * values to pass to tavor_wrid_add_entry()
240 */
241 wqeaddrsz = TAVOR_QP_WQEADDRSZ((uint64_t *)(uintptr_t)
242 ((uint64_t)(uintptr_t)desc - qp->qp_desc_off),
243 desc_sz);
244 if ((qp->qp_sq_sigtype == TAVOR_QP_SQ_ALL_SIGNALED) ||
245 (wr[wrindx].wr_flags & IBT_WR_SEND_SIGNAL)) {
246 signaled_dbd = TAVOR_WRID_ENTRY_SIGNALED;
247 } else {
248 signaled_dbd = 0;
249 }
250 tavor_wrid_add_entry(qp->qp_sq_wqhdr,
251 wr[wrindx].wr_id, wqeaddrsz, signaled_dbd);
252
253 /*
254 * If this is not the first descriptor on the current
255 * chain, then link it to the previous WQE. Otherwise,
256 * save the address and size of this descriptor (in
257 * "first" and "first_sz" respectively) and continue.
258 * Note: Linking a WQE to the the previous one will
259 * depend on whether the two WQEs are from "special
260 * QPs" (i.e. MLX transport WQEs) or whether they are
261 * normal Send WQEs.
262 */
263 if (currindx != 0) {
264 if (qp->qp_is_special) {
265 tavor_wqe_mlx_linknext(&wr[wrindx - 1],
266 desc, desc_sz, prev, NULL, qp);
267 } else {
268 tavor_wqe_send_linknext(&wr[wrindx],
269 &wr[wrindx - 1], desc, desc_sz,
270 prev, NULL, qp);
271 }
272 prev = desc;
273 } else {
274 first = desc;
275 first_sz = desc_sz;
276 }
277
278 /*
279 * Update the current "tail index" and increment
280 * "posted_cnt"
281 */
282 tail = next_tail;
283 posted_cnt++;
284 }
285
286 /*
287 * If we reach here and there are one or more WQEs which have
288 * been successfully chained together, then we need to link
289 * the current chain to the previously executing chain of
290 * descriptor (if there is one) and ring the doorbell for the
291 * send work queue.
292 */
293 if (currindx != 0) {
294 /*
295 * Before we link the chain, we need to ensure that the
296 * "next" field on the last WQE is set to NULL (to
297 * indicate the end of the chain). Note: Just as it
298 * did above, the format for the "next" fields in a
299 * given WQE depend on whether the WQE is MLX
300 * transport or not.
301 */
302 if (qp->qp_is_special) {
303 tavor_wqe_mlx_linknext(&wr[chainbegin +
304 currindx - 1], NULL, 0, prev, NULL, qp);
305 } else {
306 tavor_wqe_send_linknext(NULL,
307 &wr[chainbegin + currindx - 1], NULL, 0,
308 prev, NULL, qp);
309 }
310
311 /* Save away updated "tail index" for the DMA sync */
312 sync_to = tail;
313
314 /* Do a DMA sync for current send WQE(s) */
315 tavor_wqe_sync(qp, sync_from, sync_to, TAVOR_WR_SEND,
316 DDI_DMA_SYNC_FORDEV);
317
318 /*
319 * Now link the chain to the old chain (if there was
320 * one. Note: still need to pay attention to whether
321 * the QP used MLX transport WQEs or not.
322 */
323 if (qp->qp_is_special) {
324 tavor_wqe_mlx_linknext(NULL, first, first_sz,
325 qp->qp_sq_lastwqeaddr, &dbinfo, qp);
326 } else {
327 tavor_wqe_send_linknext(&wr[chainbegin], NULL,
328 first, first_sz, qp->qp_sq_lastwqeaddr,
329 &dbinfo, qp);
330 }
331
332 /*
333 * If there was a valid previous WQE (i.e. non-NULL),
334 * then sync it too. This is because we have updated
335 * its "next" fields and we want to ensure that the
336 * hardware can see the changes.
337 */
338 if (qp->qp_sq_lastwqeaddr != NULL) {
339 sync_to = sync_from;
340 sync_from = (sync_from - 1) & qsize_msk;
341 tavor_wqe_sync(qp, sync_from, sync_to,
342 TAVOR_WR_SEND, DDI_DMA_SYNC_FORDEV);
343 }
344
345 /*
346 * Now if the WRID tail entry is non-NULL, then this
347 * represents the entry to which we are chaining the
348 * new entries. Since we are going to ring the
349 * doorbell for this WQE, we want set its "dbd" bit.
350 *
351 * On the other hand, if the tail is NULL, even though
352 * we will have rung the doorbell for the previous WQE
353 * (for the hardware's sake) it is irrelevant to our
354 * purposes (for tracking WRIDs) because we know the
355 * request must have already completed.
356 */
357 wre_last = wridlist->wl_wre_old_tail;
358 if (wre_last != NULL) {
359 wre_last->wr_signaled_dbd |=
360 TAVOR_WRID_ENTRY_DOORBELLED;
361 }
362
363 /* Update some of the state in the QP */
364 qp->qp_sq_lastwqeaddr = desc;
365 qp->qp_sq_wqhdr->wq_tail = tail;
366
367 /* Ring the doorbell */
368 tavor_qp_send_doorbell(state,
369 (uint32_t)((uintptr_t)first - qp->qp_desc_off),
370 first_sz, qp->qp_qpnum, dbinfo.db_fence,
371 dbinfo.db_nopcode);
372 }
373 }
374
375 /*
376 * Update the "num_posted" return value (if necessary). Then drop
377 * the locks and return success.
378 */
379 if (num_posted != NULL) {
380 *num_posted = posted_cnt;
381 }
382
383 mutex_exit(&qp->qp_sq_wqhdr->wq_wrid_wql->wql_lock);
384 mutex_exit(&qp->qp_lock);
385
386 TAVOR_TNF_EXIT(tavor_post_send);
387 return (status);
388 }
389
390
391 /*
392 * tavor_post_recv()
393 * Context: Can be called from interrupt or base context.
394 */
395 int
396 tavor_post_recv(tavor_state_t *state, tavor_qphdl_t qp,
397 ibt_recv_wr_t *wr, uint_t num_wr, uint_t *num_posted)
398 {
399 uint64_t *desc, *prev, *first;
400 uint32_t desc_sz, first_sz;
401 uint32_t wqeaddrsz, signaled_dbd;
402 uint32_t head, tail, next_tail, qsize_msk;
403 uint32_t sync_from, sync_to;
404 uint_t currindx, wrindx, numremain;
405 uint_t chainlen, posted_cnt;
406 uint_t maxdb = TAVOR_QP_MAXDESC_PER_DB;
407 int status;
408
409 TAVOR_TNF_ENTER(tavor_post_recv);
410
411 /*
412 * Check for user-mappable QP memory. Note: We do not allow kernel
413 * clients to post to QP memory that is accessible directly by the
414 * user. If the QP memory is user accessible, then return an error.
415 */
416 if (qp->qp_is_umap) {
417 TNF_PROBE_0(tavor_post_recv_inv_usrmapped_type,
418 TAVOR_TNF_ERROR, "");
419 TAVOR_TNF_EXIT(tavor_post_recv);
420 return (IBT_QP_HDL_INVALID);
421 }
422
423 /* Initialize posted_cnt */
424 posted_cnt = 0;
425
426 mutex_enter(&qp->qp_lock);
427
428 /*
429 * Check if QP is associated with an SRQ
430 */
431 if (qp->qp_srq_en == TAVOR_QP_SRQ_ENABLED) {
432 mutex_exit(&qp->qp_lock);
433 TNF_PROBE_0(tavor_post_recv_fail_qp_on_srq,
434 TAVOR_TNF_ERROR, "");
435 TAVOR_TNF_EXIT(tavor_post_recv);
436 return (IBT_SRQ_IN_USE);
437 }
438
439 /*
440 * Check QP state. Can not post Recv requests from the "Reset" state
441 */
442 if (qp->qp_state == TAVOR_QP_RESET) {
443 mutex_exit(&qp->qp_lock);
444 TNF_PROBE_0(tavor_post_recv_inv_qpstate_fail,
445 TAVOR_TNF_ERROR, "");
446 TAVOR_TNF_EXIT(tavor_post_recv);
447 return (IBT_QP_STATE_INVALID);
448 }
449
450 /* Grab the lock for the WRID list */
451 mutex_enter(&qp->qp_rq_wqhdr->wq_wrid_wql->wql_lock);
452
453 /* Save away some initial QP state */
454 qsize_msk = qp->qp_rq_wqhdr->wq_size - 1;
455 tail = qp->qp_rq_wqhdr->wq_tail;
456 head = qp->qp_rq_wqhdr->wq_head;
457
458 /*
459 * For each ibt_recv_wr_t in the wr[] list passed in, parse the
460 * request and build a Recv WQE. Note: Because we are potentially
461 * building a chain of WQEs, we want to link them all together.
462 * However, we do not want to link the first one to the previous
463 * WQE until the entire chain has been linked. Then in the last
464 * step we ring the appropriate doorbell. Note: It is possible for
465 * more Work Requests to be posted than the HW will support at one
466 * shot. If this happens, we need to be able to post and ring
467 * several chains here until the the entire request is complete.
468 */
469 wrindx = 0;
470 numremain = num_wr;
471 status = DDI_SUCCESS;
472 while ((wrindx < num_wr) && (status == DDI_SUCCESS)) {
473 /*
474 * For the first WQE on a new chain we need "prev" to point
475 * to the current descriptor. As we begin to process
476 * further, "prev" will be updated to point to the previous
477 * WQE on the current chain (see below).
478 */
479 prev = TAVOR_QP_RQ_ENTRY(qp, tail);
480
481 /*
482 * Before we begin, save the current "tail index" for later
483 * DMA sync
484 */
485 sync_from = tail;
486
487 /*
488 * Break the request up into chains that are less than or
489 * equal to the maximum number of WQEs that can be posted
490 * per doorbell ring
491 */
492 chainlen = (numremain > maxdb) ? maxdb : numremain;
493 numremain -= chainlen;
494 for (currindx = 0; currindx < chainlen; currindx++, wrindx++) {
495 /*
496 * Check for "queue full" condition. If the queue
497 * is already full, then no more WQEs can be posted.
498 * So break out, ring a doorbell (if necessary) and
499 * return an error
500 */
501 if (qp->qp_rq_wqhdr->wq_full != 0) {
502 status = IBT_QP_FULL;
503 TNF_PROBE_0_DEBUG(tavor_post_recv_rqfull,
504 TAVOR_TNF_TRACE, "");
505 break;
506 }
507
508 /*
509 * Increment the "tail index" and check for "queue
510 * full" condition. If we detect that the current
511 * work request is going to fill the work queue, then
512 * we mark this condition and continue.
513 */
514 next_tail = (tail + 1) & qsize_msk;
515 if (next_tail == head) {
516 qp->qp_rq_wqhdr->wq_full = 1;
517 }
518
519 /*
520 * Get the address of the location where the next
521 * Recv WQE should be built
522 */
523 desc = TAVOR_QP_RQ_ENTRY(qp, tail);
524
525 /*
526 * Call tavor_wqe_recv_build() to build the WQE
527 * at the given address. This routine uses the
528 * information in the ibt_recv_wr_t list (wr[]) and
529 * returns the size of the WQE when it returns.
530 */
531 status = tavor_wqe_recv_build(state, qp, &wr[wrindx],
532 desc, &desc_sz);
533 if (status != DDI_SUCCESS) {
534 TNF_PROBE_0(tavor_post_recv_bldwqe_fail,
535 TAVOR_TNF_ERROR, "");
536 break;
537 }
538
539 /*
540 * Add a WRID entry to the WRID list. Need to
541 * calculate the "wqeaddrsz" and "signaled_dbd"
542 * values to pass to tavor_wrid_add_entry(). Note:
543 * all Recv WQEs are essentially "signaled" and
544 * "doorbelled" (since Tavor HW requires all
545 * RecvWQE's to have their "DBD" bits set).
546 */
547 wqeaddrsz = TAVOR_QP_WQEADDRSZ((uint64_t *)(uintptr_t)
548 ((uint64_t)(uintptr_t)desc - qp->qp_desc_off),
549 desc_sz);
550 signaled_dbd = TAVOR_WRID_ENTRY_SIGNALED |
551 TAVOR_WRID_ENTRY_DOORBELLED;
552 tavor_wrid_add_entry(qp->qp_rq_wqhdr,
553 wr[wrindx].wr_id, wqeaddrsz, signaled_dbd);
554
555 /*
556 * If this is not the first descriptor on the current
557 * chain, then link it to the previous WQE. Otherwise,
558 * save the address and size of this descriptor (in
559 * "first" and "first_sz" respectively) and continue.
560 */
561 if (currindx != 0) {
562 tavor_wqe_recv_linknext(desc, desc_sz, prev,
563 qp);
564 prev = desc;
565 } else {
566 first = desc;
567 first_sz = desc_sz;
568 }
569
570 /*
571 * Update the current "tail index" and increment
572 * "posted_cnt"
573 */
574 tail = next_tail;
575 posted_cnt++;
576 }
577
578 /*
579 * If we reach here and there are one or more WQEs which have
580 * been successfully chained together, then we need to link
581 * the current chain to the previously executing chain of
582 * descriptor (if there is one) and ring the doorbell for the
583 * recv work queue.
584 */
585 if (currindx != 0) {
586 /*
587 * Before we link the chain, we need to ensure that the
588 * "next" field on the last WQE is set to NULL (to
589 * indicate the end of the chain).
590 */
591 tavor_wqe_recv_linknext(NULL, 0, prev, qp);
592
593 /* Save away updated "tail index" for the DMA sync */
594 sync_to = tail;
595
596 /* Do a DMA sync for current recv WQE(s) */
597 tavor_wqe_sync(qp, sync_from, sync_to, TAVOR_WR_RECV,
598 DDI_DMA_SYNC_FORDEV);
599
600 /*
601 * Now link the chain to the old chain (if there was
602 * one.
603 */
604 tavor_wqe_recv_linknext(first, first_sz,
605 qp->qp_rq_lastwqeaddr, qp);
606
607 /*
608 * If there was a valid previous WQE (i.e. non-NULL),
609 * then sync it too. This is because we have updated
610 * its "next" fields and we want to ensure that the
611 * hardware can see the changes.
612 */
613 if (qp->qp_rq_lastwqeaddr != NULL) {
614 sync_to = sync_from;
615 sync_from = (sync_from - 1) & qsize_msk;
616 tavor_wqe_sync(qp, sync_from, sync_to,
617 TAVOR_WR_RECV, DDI_DMA_SYNC_FORDEV);
618 }
619
620 /* Update some of the state in the QP */
621 qp->qp_rq_lastwqeaddr = desc;
622 qp->qp_rq_wqhdr->wq_tail = tail;
623
624 /* Ring the doorbell */
625 tavor_qp_recv_doorbell(state,
626 (uint32_t)((uintptr_t)first - qp->qp_desc_off),
627 first_sz, qp->qp_qpnum, (chainlen % maxdb));
628 }
629 }
630
631 /*
632 * Update the "num_posted" return value (if necessary). Then drop
633 * the locks and return success.
634 */
635 if (num_posted != NULL) {
636 *num_posted = posted_cnt;
637 }
638
639 mutex_exit(&qp->qp_rq_wqhdr->wq_wrid_wql->wql_lock);
640 mutex_exit(&qp->qp_lock);
641
642 TAVOR_TNF_EXIT(tavor_post_recv);
643 return (status);
644 }
645
646 /*
647 * tavor_post_srq()
648 * Context: Can be called from interrupt or base context.
649 */
650 int
651 tavor_post_srq(tavor_state_t *state, tavor_srqhdl_t srq,
652 ibt_recv_wr_t *wr, uint_t num_wr, uint_t *num_posted)
653 {
654 uint64_t *desc, *prev, *first, *last_wqe_addr;
655 uint32_t signaled_dbd;
656 uint32_t sync_indx;
657 uint_t currindx, wrindx, numremain;
658 uint_t chainlen, posted_cnt;
659 uint_t maxdb = TAVOR_QP_MAXDESC_PER_DB;
660 int status;
661
662 TAVOR_TNF_ENTER(tavor_post_srq);
663
664 /*
665 * Check for user-mappable QP memory. Note: We do not allow kernel
666 * clients to post to QP memory that is accessible directly by the
667 * user. If the QP memory is user accessible, then return an error.
668 */
669 if (srq->srq_is_umap) {
670 TNF_PROBE_0(tavor_post_srq_inv_usrmapped_type,
671 TAVOR_TNF_ERROR, "");
672 TAVOR_TNF_EXIT(tavor_post_srq);
673 return (IBT_SRQ_HDL_INVALID);
674 }
675
676 /* Initialize posted_cnt */
677 posted_cnt = 0;
678
679 mutex_enter(&srq->srq_lock);
680
681 /*
682 * Check SRQ state. Can not post Recv requests when SRQ is in error
683 */
684 if (srq->srq_state == TAVOR_SRQ_STATE_ERROR) {
685 mutex_exit(&srq->srq_lock);
686 TNF_PROBE_0(tavor_post_srq_inv_srqstate_fail,
687 TAVOR_TNF_ERROR, "");
688 TAVOR_TNF_EXIT(tavor_post_srq);
689 return (IBT_QP_STATE_INVALID);
690 }
691
692 /* Grab the lock for the WRID list */
693 mutex_enter(&srq->srq_wrid_wql->wql_lock);
694
695 /*
696 * For each ibt_recv_wr_t in the wr[] list passed in, parse the
697 * request and build a Recv WQE. Note: Because we are potentially
698 * building a chain of WQEs, we want to link them all together.
699 * However, we do not want to link the first one to the previous
700 * WQE until the entire chain has been linked. Then in the last
701 * step we ring the appropriate doorbell. Note: It is possible for
702 * more Work Requests to be posted than the HW will support at one
703 * shot. If this happens, we need to be able to post and ring
704 * several chains here until the the entire request is complete.
705 */
706 wrindx = 0;
707 numremain = num_wr;
708 status = DDI_SUCCESS;
709 while ((wrindx < num_wr) && (status == DDI_SUCCESS)) {
710 /*
711 * For the first WQE on a new chain we need "prev" to point
712 * to the current descriptor. As we begin to process
713 * further, "prev" will be updated to point to the previous
714 * WQE on the current chain (see below).
715 */
716 if (srq->srq_wq_lastwqeindx == -1) {
717 prev = NULL;
718 } else {
719 prev = TAVOR_SRQ_WQE_ADDR(srq, srq->srq_wq_lastwqeindx);
720 }
721
722 /*
723 * Break the request up into chains that are less than or
724 * equal to the maximum number of WQEs that can be posted
725 * per doorbell ring
726 */
727 chainlen = (numremain > maxdb) ? maxdb : numremain;
728 numremain -= chainlen;
729 for (currindx = 0; currindx < chainlen; currindx++, wrindx++) {
730
731 /*
732 * Check for "queue full" condition. If the queue
733 * is already full, then no more WQEs can be posted.
734 * So break out, ring a doorbell (if necessary) and
735 * return an error
736 */
737 if (srq->srq_wridlist->wl_free_list_indx == -1) {
738 status = IBT_QP_FULL;
739 TNF_PROBE_0_DEBUG(tavor_post_srq_wqfull,
740 TAVOR_TNF_TRACE, "");
741 break;
742 }
743
744 /*
745 * Get the address of the location where the next
746 * Recv WQE should be built
747 */
748 desc = TAVOR_SRQ_WQE_ADDR(srq,
749 srq->srq_wridlist->wl_free_list_indx);
750
751 /*
752 * Add a WRID entry to the WRID list. Need to
753 * set the "signaled_dbd" values to pass to
754 * tavor_wrid_add_entry(). Note: all Recv WQEs are
755 * essentially "signaled"
756 *
757 * The 'size' is stored at srq_alloc time, in the
758 * srq_wq_stride. This is a constant value required
759 * for SRQ.
760 */
761 signaled_dbd = TAVOR_WRID_ENTRY_SIGNALED;
762 tavor_wrid_add_entry_srq(srq, wr[wrindx].wr_id,
763 signaled_dbd);
764
765 /*
766 * Call tavor_wqe_srq_build() to build the WQE
767 * at the given address. This routine uses the
768 * information in the ibt_recv_wr_t list (wr[]) and
769 * returns the size of the WQE when it returns.
770 */
771 status = tavor_wqe_srq_build(state, srq, &wr[wrindx],
772 desc);
773 if (status != DDI_SUCCESS) {
774 TNF_PROBE_0(tavor_post_recv_bldwqe_fail,
775 TAVOR_TNF_ERROR, "");
776 break;
777 }
778
779 /*
780 * If this is not the first descriptor on the current
781 * chain, then link it to the previous WQE. Otherwise,
782 * save the address of this descriptor (in "first") and
783 * continue.
784 */
785 if (currindx != 0) {
786 tavor_wqe_srq_linknext(desc, prev, srq);
787 sync_indx = TAVOR_SRQ_WQE_INDEX(
788 srq->srq_wq_buf, prev,
789 srq->srq_wq_log_wqesz);
790
791 /* Do a DMA sync for previous recv WQE */
792 tavor_wqe_sync(srq, sync_indx, sync_indx+1,
793 TAVOR_WR_SRQ, DDI_DMA_SYNC_FORDEV);
794
795 prev = desc;
796 } else {
797
798 /*
799 * In this case, the last WQE on the chain is
800 * also considered 'first'. So set prev to
801 * first, here.
802 */
803 first = prev = desc;
804 }
805
806 /*
807 * Increment "posted_cnt"
808 */
809 posted_cnt++;
810 }
811
812 /*
813 * If we reach here and there are one or more WQEs which have
814 * been successfully chained together, then we need to link
815 * the current chain to the previously executing chain of
816 * descriptor (if there is one) and ring the doorbell for the
817 * recv work queue.
818 */
819 if (currindx != 0) {
820 /*
821 * Before we link the chain, we need to ensure that the
822 * "next" field on the last WQE is set to NULL (to
823 * indicate the end of the chain).
824 */
825 tavor_wqe_srq_linknext(NULL, prev, srq);
826
827 sync_indx = TAVOR_SRQ_WQE_INDEX(srq->srq_wq_buf, prev,
828 srq->srq_wq_log_wqesz);
829
830 /* Do a DMA sync for current recv WQE */
831 tavor_wqe_sync(srq, sync_indx, sync_indx+1,
832 TAVOR_WR_SRQ, DDI_DMA_SYNC_FORDEV);
833
834 /*
835 * Now link the chain to the old chain (if there was
836 * one).
837 */
838 if (srq->srq_wq_lastwqeindx == -1) {
839 last_wqe_addr = NULL;
840 } else {
841 last_wqe_addr = TAVOR_SRQ_WQE_ADDR(srq,
842 srq->srq_wq_lastwqeindx);
843 }
844 tavor_wqe_srq_linknext(first, last_wqe_addr, srq);
845
846 /*
847 * If there was a valid previous WQE (i.e. valid index),
848 * then sync it too. This is because we have updated
849 * its "next" fields and we want to ensure that the
850 * hardware can see the changes.
851 */
852 if (srq->srq_wq_lastwqeindx != -1) {
853 sync_indx = srq->srq_wq_lastwqeindx;
854 tavor_wqe_sync(srq, sync_indx, sync_indx+1,
855 TAVOR_WR_SRQ, DDI_DMA_SYNC_FORDEV);
856 }
857
858 /* Update some of the state in the QP */
859 srq->srq_wq_lastwqeindx = TAVOR_SRQ_WQE_INDEX(
860 srq->srq_wq_buf, desc,
861 srq->srq_wq_log_wqesz);
862
863 /* Ring the doorbell */
864 /* SRQ needs NDS of 0 */
865 tavor_qp_recv_doorbell(state,
866 (uint32_t)((uintptr_t)first - srq->srq_desc_off),
867 0, srq->srq_srqnum, (chainlen % maxdb));
868 }
869 }
870
871 /*
872 * Update the "num_posted" return value (if necessary). Then drop
873 * the locks and return success.
874 */
875 if (num_posted != NULL) {
876 *num_posted = posted_cnt;
877 }
878
879 mutex_exit(&srq->srq_wrid_wql->wql_lock);
880 mutex_exit(&srq->srq_lock);
881
882 TAVOR_TNF_EXIT(tavor_post_srq);
883 return (status);
884 }
885
886
887 /*
888 * tavor_qp_send_doorbell()
889 * Context: Can be called from interrupt or base context.
890 */
891 static void
892 tavor_qp_send_doorbell(tavor_state_t *state, uint32_t nda, uint32_t nds,
893 uint32_t qpn, uint32_t fence, uint32_t nopcode)
894 {
895 uint64_t doorbell = 0;
896
897 /* Build the doorbell from the parameters */
898 doorbell = (((uint64_t)nda & TAVOR_QPSNDDB_NDA_MASK) <<
899 TAVOR_QPSNDDB_NDA_SHIFT) |
900 ((uint64_t)fence << TAVOR_QPSNDDB_F_SHIFT) |
901 ((uint64_t)nopcode << TAVOR_QPSNDDB_NOPCODE_SHIFT) |
902 ((uint64_t)qpn << TAVOR_QPSNDDB_QPN_SHIFT) | nds;
903
904 TNF_PROBE_1_DEBUG(tavor_qp_send_doorbell, TAVOR_TNF_TRACE, "",
905 tnf_ulong, doorbell, doorbell);
906
907 /* Write the doorbell to UAR */
908 TAVOR_UAR_DOORBELL(state, (uint64_t *)&state->ts_uar->send,
909 doorbell);
910 }
911
912
913 /*
914 * tavor_qp_recv_doorbell()
915 * Context: Can be called from interrupt or base context.
916 */
917 static void
918 tavor_qp_recv_doorbell(tavor_state_t *state, uint32_t nda, uint32_t nds,
919 uint32_t qpn, uint32_t credits)
920 {
921 uint64_t doorbell = 0;
922
923 /* Build the doorbell from the parameters */
924 doorbell = (((uint64_t)nda & TAVOR_QPRCVDB_NDA_MASK) <<
925 TAVOR_QPRCVDB_NDA_SHIFT) |
926 ((uint64_t)nds << TAVOR_QPRCVDB_NDS_SHIFT) |
927 ((uint64_t)qpn << TAVOR_QPRCVDB_QPN_SHIFT) | credits;
928
929 TNF_PROBE_1_DEBUG(tavor_qp_recv_doorbell, TAVOR_TNF_TRACE, "",
930 tnf_ulong, doorbell, doorbell);
931
932 /* Write the doorbell to UAR */
933 TAVOR_UAR_DOORBELL(state, (uint64_t *)&state->ts_uar->recv,
934 doorbell);
935 }
936
937
938 /*
939 * tavor_wqe_send_build()
940 * Context: Can be called from interrupt or base context.
941 */
942 static int
943 tavor_wqe_send_build(tavor_state_t *state, tavor_qphdl_t qp,
944 ibt_send_wr_t *wr, uint64_t *desc, uint_t *size)
945 {
946 tavor_hw_snd_wqe_ud_t *ud;
947 tavor_hw_snd_wqe_remaddr_t *rc;
948 tavor_hw_snd_wqe_atomic_t *at;
949 tavor_hw_snd_wqe_remaddr_t *uc;
950 tavor_hw_snd_wqe_bind_t *bn;
951 tavor_hw_wqe_sgl_t *ds;
952 ibt_wr_ds_t *sgl;
953 tavor_ahhdl_t ah;
954 uint32_t nds;
955 int i, num_ds, status;
956
957 TAVOR_TNF_ENTER(tavor_wqe_send_build);
958
959 ASSERT(MUTEX_HELD(&qp->qp_lock));
960
961 /* Initialize the information for the Data Segments */
962 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)desc +
963 sizeof (tavor_hw_snd_wqe_nextctrl_t));
964 nds = wr->wr_nds;
965 sgl = wr->wr_sgl;
966 num_ds = 0;
967
968 /*
969 * Build a Send WQE depends first and foremost on the transport
970 * type of Work Request (i.e. UD, RC, or UC)
971 */
972 switch (wr->wr_trans) {
973 case IBT_UD_SRV:
974 /* Ensure that work request transport type matches QP type */
975 if (qp->qp_serv_type != TAVOR_QP_UD) {
976 TNF_PROBE_0(tavor_wqe_send_build_inv_servtype_fail,
977 TAVOR_TNF_ERROR, "");
978 TAVOR_TNF_EXIT(tavor_wqe_send_build);
979 return (IBT_QP_SRV_TYPE_INVALID);
980 }
981
982 /*
983 * Validate the operation type. For UD requests, only the
984 * "Send" operation is valid
985 */
986 if (wr->wr_opcode != IBT_WRC_SEND) {
987 TNF_PROBE_0(tavor_wqe_send_build_inv_optype_fail,
988 TAVOR_TNF_ERROR, "");
989 TAVOR_TNF_EXIT(tavor_wqe_send_build);
990 return (IBT_QP_OP_TYPE_INVALID);
991 }
992
993 /*
994 * If this is a Special QP (QP0 or QP1), then we need to
995 * build MLX WQEs instead. So jump to tavor_wqe_mlx_build()
996 * and return whatever status it returns
997 */
998 if (qp->qp_is_special) {
999 status = tavor_wqe_mlx_build(state, qp, wr, desc, size);
1000 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1001 return (status);
1002 }
1003
1004 /*
1005 * Otherwise, if this is a normal UD Send request, then fill
1006 * all the fields in the Tavor UD header for the WQE. Note:
1007 * to do this we'll need to extract some information from the
1008 * Address Handle passed with the work request.
1009 */
1010 ud = (tavor_hw_snd_wqe_ud_t *)((uintptr_t)desc +
1011 sizeof (tavor_hw_snd_wqe_nextctrl_t));
1012 ah = (tavor_ahhdl_t)wr->wr.ud.udwr_dest->ud_ah;
1013 if (ah == NULL) {
1014 TNF_PROBE_0(tavor_wqe_send_build_invahhdl_fail,
1015 TAVOR_TNF_ERROR, "");
1016 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1017 return (IBT_AH_HDL_INVALID);
1018 }
1019
1020 /*
1021 * Build the Unreliable Datagram Segment for the WQE, using
1022 * the information from the address handle and the work
1023 * request.
1024 */
1025 mutex_enter(&ah->ah_lock);
1026 TAVOR_WQE_BUILD_UD(qp, ud, ah, wr);
1027 mutex_exit(&ah->ah_lock);
1028
1029 /* Update "ds" for filling in Data Segments (below) */
1030 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)ud +
1031 sizeof (tavor_hw_snd_wqe_ud_t));
1032 break;
1033
1034 case IBT_RC_SRV:
1035 /* Ensure that work request transport type matches QP type */
1036 if (qp->qp_serv_type != TAVOR_QP_RC) {
1037 TNF_PROBE_0(tavor_wqe_send_build_inv_servtype_fail,
1038 TAVOR_TNF_ERROR, "");
1039 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1040 return (IBT_QP_SRV_TYPE_INVALID);
1041 }
1042
1043 /*
1044 * Validate the operation type. For RC requests, we allow
1045 * "Send", "RDMA Read", "RDMA Write", various "Atomic"
1046 * operations, and memory window "Bind"
1047 */
1048 if ((wr->wr_opcode != IBT_WRC_SEND) &&
1049 (wr->wr_opcode != IBT_WRC_RDMAR) &&
1050 (wr->wr_opcode != IBT_WRC_RDMAW) &&
1051 (wr->wr_opcode != IBT_WRC_CSWAP) &&
1052 (wr->wr_opcode != IBT_WRC_FADD) &&
1053 (wr->wr_opcode != IBT_WRC_BIND)) {
1054 TNF_PROBE_0(tavor_wqe_send_build_inv_optype_fail,
1055 TAVOR_TNF_ERROR, "");
1056 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1057 return (IBT_QP_OP_TYPE_INVALID);
1058 }
1059
1060 /*
1061 * If this is a Send request, then all we need to do is break
1062 * out and here and begin the Data Segment processing below
1063 */
1064 if (wr->wr_opcode == IBT_WRC_SEND) {
1065 break;
1066 }
1067
1068 /*
1069 * If this is an RDMA Read or RDMA Write request, then fill
1070 * in the "Remote Address" header fields.
1071 */
1072 if ((wr->wr_opcode == IBT_WRC_RDMAR) ||
1073 (wr->wr_opcode == IBT_WRC_RDMAW)) {
1074 rc = (tavor_hw_snd_wqe_remaddr_t *)((uintptr_t)desc +
1075 sizeof (tavor_hw_snd_wqe_nextctrl_t));
1076
1077 /*
1078 * Build the Remote Address Segment for the WQE, using
1079 * the information from the RC work request.
1080 */
1081 TAVOR_WQE_BUILD_REMADDR(qp, rc, &wr->wr.rc.rcwr.rdma);
1082
1083 /* Update "ds" for filling in Data Segments (below) */
1084 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)rc +
1085 sizeof (tavor_hw_snd_wqe_remaddr_t));
1086 break;
1087 }
1088
1089 /*
1090 * If this is one of the Atomic type operations (i.e
1091 * Compare-Swap or Fetch-Add), then fill in both the "Remote
1092 * Address" header fields and the "Atomic" header fields.
1093 */
1094 if ((wr->wr_opcode == IBT_WRC_CSWAP) ||
1095 (wr->wr_opcode == IBT_WRC_FADD)) {
1096 rc = (tavor_hw_snd_wqe_remaddr_t *)((uintptr_t)desc +
1097 sizeof (tavor_hw_snd_wqe_nextctrl_t));
1098 at = (tavor_hw_snd_wqe_atomic_t *)((uintptr_t)rc +
1099 sizeof (tavor_hw_snd_wqe_remaddr_t));
1100
1101 /*
1102 * Build the Remote Address and Atomic Segments for
1103 * the WQE, using the information from the RC Atomic
1104 * work request.
1105 */
1106 TAVOR_WQE_BUILD_RC_ATOMIC_REMADDR(qp, rc, wr);
1107 TAVOR_WQE_BUILD_ATOMIC(qp, at, wr->wr.rc.rcwr.atomic);
1108
1109 /* Update "ds" for filling in Data Segments (below) */
1110 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)at +
1111 sizeof (tavor_hw_snd_wqe_atomic_t));
1112
1113 /*
1114 * Update "nds" and "sgl" because Atomic requests have
1115 * only a single Data Segment (and they are encoded
1116 * somewhat differently in the work request.
1117 */
1118 nds = 1;
1119 sgl = wr->wr_sgl;
1120 break;
1121 }
1122
1123 /*
1124 * If this is memory window Bind operation, then we call the
1125 * tavor_wr_bind_check() routine to validate the request and
1126 * to generate the updated RKey. If this is successful, then
1127 * we fill in the WQE's "Bind" header fields.
1128 */
1129 if (wr->wr_opcode == IBT_WRC_BIND) {
1130 status = tavor_wr_bind_check(state, wr);
1131 if (status != DDI_SUCCESS) {
1132 TNF_PROBE_0(tavor_wqe_send_build_bind_fail,
1133 TAVOR_TNF_ERROR, "");
1134 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1135 return (status);
1136 }
1137
1138 bn = (tavor_hw_snd_wqe_bind_t *)((uintptr_t)desc +
1139 sizeof (tavor_hw_snd_wqe_nextctrl_t));
1140
1141 /*
1142 * Build the Bind Memory Window Segments for the WQE,
1143 * using the information from the RC Bind memory
1144 * window work request.
1145 */
1146 TAVOR_WQE_BUILD_BIND(qp, bn, wr->wr.rc.rcwr.bind);
1147
1148 /*
1149 * Update the "ds" pointer. Even though the "bind"
1150 * operation requires no SGLs, this is necessary to
1151 * facilitate the correct descriptor size calculations
1152 * (below).
1153 */
1154 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)bn +
1155 sizeof (tavor_hw_snd_wqe_bind_t));
1156 nds = 0;
1157 }
1158 break;
1159
1160 case IBT_UC_SRV:
1161 /* Ensure that work request transport type matches QP type */
1162 if (qp->qp_serv_type != TAVOR_QP_UC) {
1163 TNF_PROBE_0(tavor_wqe_send_build_inv_servtype_fail,
1164 TAVOR_TNF_ERROR, "");
1165 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1166 return (IBT_QP_SRV_TYPE_INVALID);
1167 }
1168
1169 /*
1170 * Validate the operation type. For UC requests, we only
1171 * allow "Send", "RDMA Write", and memory window "Bind".
1172 * Note: Unlike RC, UC does not allow "RDMA Read" or "Atomic"
1173 * operations
1174 */
1175 if ((wr->wr_opcode != IBT_WRC_SEND) &&
1176 (wr->wr_opcode != IBT_WRC_RDMAW) &&
1177 (wr->wr_opcode != IBT_WRC_BIND)) {
1178 TNF_PROBE_0(tavor_wqe_send_build_inv_optype_fail,
1179 TAVOR_TNF_ERROR, "");
1180 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1181 return (IBT_QP_OP_TYPE_INVALID);
1182 }
1183
1184 /*
1185 * If this is a Send request, then all we need to do is break
1186 * out and here and begin the Data Segment processing below
1187 */
1188 if (wr->wr_opcode == IBT_WRC_SEND) {
1189 break;
1190 }
1191
1192 /*
1193 * If this is an RDMA Write request, then fill in the "Remote
1194 * Address" header fields.
1195 */
1196 if (wr->wr_opcode == IBT_WRC_RDMAW) {
1197 uc = (tavor_hw_snd_wqe_remaddr_t *)((uintptr_t)desc +
1198 sizeof (tavor_hw_snd_wqe_nextctrl_t));
1199
1200 /*
1201 * Build the Remote Address Segment for the WQE, using
1202 * the information from the UC work request.
1203 */
1204 TAVOR_WQE_BUILD_REMADDR(qp, uc, &wr->wr.uc.ucwr.rdma);
1205
1206 /* Update "ds" for filling in Data Segments (below) */
1207 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)uc +
1208 sizeof (tavor_hw_snd_wqe_remaddr_t));
1209 break;
1210 }
1211
1212 /*
1213 * If this is memory window Bind operation, then we call the
1214 * tavor_wr_bind_check() routine to validate the request and
1215 * to generate the updated RKey. If this is successful, then
1216 * we fill in the WQE's "Bind" header fields.
1217 */
1218 if (wr->wr_opcode == IBT_WRC_BIND) {
1219 status = tavor_wr_bind_check(state, wr);
1220 if (status != DDI_SUCCESS) {
1221 TNF_PROBE_0(tavor_wqe_send_build_bind_fail,
1222 TAVOR_TNF_ERROR, "");
1223 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1224 return (status);
1225 }
1226
1227 bn = (tavor_hw_snd_wqe_bind_t *)((uintptr_t)desc +
1228 sizeof (tavor_hw_snd_wqe_nextctrl_t));
1229
1230 /*
1231 * Build the Bind Memory Window Segments for the WQE,
1232 * using the information from the UC Bind memory
1233 * window work request.
1234 */
1235 TAVOR_WQE_BUILD_BIND(qp, bn, wr->wr.uc.ucwr.bind);
1236
1237 /*
1238 * Update the "ds" pointer. Even though the "bind"
1239 * operation requires no SGLs, this is necessary to
1240 * facilitate the correct descriptor size calculations
1241 * (below).
1242 */
1243 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)bn +
1244 sizeof (tavor_hw_snd_wqe_bind_t));
1245 nds = 0;
1246 }
1247 break;
1248
1249 default:
1250 TNF_PROBE_0(tavor_wqe_send_build_inv_tranport_fail,
1251 TAVOR_TNF_ERROR, "");
1252 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1253 return (IBT_QP_SRV_TYPE_INVALID);
1254 }
1255
1256 /*
1257 * Now fill in the Data Segments (SGL) for the Send WQE based on
1258 * the values setup above (i.e. "sgl", "nds", and the "ds" pointer
1259 * Start by checking for a valid number of SGL entries
1260 */
1261 if (nds > qp->qp_sq_sgl) {
1262 TNF_PROBE_0(tavor_wqe_send_build_toomanysgl_fail,
1263 TAVOR_TNF_ERROR, "");
1264 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1265 return (IBT_QP_SGL_LEN_INVALID);
1266 }
1267
1268 /*
1269 * For each SGL in the Send Work Request, fill in the Send WQE's data
1270 * segments. Note: We skip any SGL with zero size because Tavor
1271 * hardware cannot handle a zero for "byte_cnt" in the WQE. Actually
1272 * the encoding for zero means a 2GB transfer. Because of this special
1273 * encoding in the hardware, we mask the requested length with
1274 * TAVOR_WQE_SGL_BYTE_CNT_MASK (so that 2GB will end up encoded as
1275 * zero.)
1276 */
1277 for (i = 0; i < nds; i++) {
1278 if (sgl[i].ds_len == 0) {
1279 continue;
1280 }
1281
1282 /*
1283 * Fill in the Data Segment(s) for the current WQE, using the
1284 * information contained in the scatter-gather list of the
1285 * work request.
1286 */
1287 TAVOR_WQE_BUILD_DATA_SEG(qp, &ds[num_ds], &sgl[i]);
1288 num_ds++;
1289 }
1290
1291 /* Return the size of descriptor (in 16-byte chunks) */
1292 *size = ((uintptr_t)&ds[num_ds] - (uintptr_t)desc) >> 4;
1293
1294 TAVOR_TNF_EXIT(tavor_wqe_send_build);
1295 return (DDI_SUCCESS);
1296 }
1297
1298
1299 /*
1300 * tavor_wqe_send_linknext()
1301 * Context: Can be called from interrupt or base context.
1302 */
1303 static void
1304 tavor_wqe_send_linknext(ibt_send_wr_t *curr_wr, ibt_send_wr_t *prev_wr,
1305 uint64_t *curr_desc, uint_t curr_descsz, uint64_t *prev_desc,
1306 tavor_sw_wqe_dbinfo_t *dbinfo, tavor_qphdl_t qp)
1307 {
1308 uint64_t next, ctrl;
1309 uint32_t nopcode, fence;
1310
1311 /*
1312 * Calculate the "next" field of the descriptor. This amounts to
1313 * setting up the "next_wqe_addr", "nopcode", "fence", and "nds"
1314 * fields (see tavor_hw.h for more). Note: If there is no next
1315 * descriptor (i.e. if the current descriptor is the last WQE on
1316 * the chain), then set "next" to zero.
1317 */
1318 if (curr_desc != NULL) {
1319 /*
1320 * Determine the value for the Tavor WQE "nopcode" field
1321 * by using the IBTF opcode from the work request
1322 */
1323 switch (curr_wr->wr_opcode) {
1324 case IBT_WRC_RDMAW:
1325 if (curr_wr->wr_flags & IBT_WR_SEND_IMMED) {
1326 nopcode = TAVOR_WQE_SEND_NOPCODE_RDMAWI;
1327 } else {
1328 nopcode = TAVOR_WQE_SEND_NOPCODE_RDMAW;
1329 }
1330 break;
1331
1332 case IBT_WRC_SEND:
1333 if (curr_wr->wr_flags & IBT_WR_SEND_IMMED) {
1334 nopcode = TAVOR_WQE_SEND_NOPCODE_SENDI;
1335 } else {
1336 nopcode = TAVOR_WQE_SEND_NOPCODE_SEND;
1337 }
1338 break;
1339
1340 case IBT_WRC_RDMAR:
1341 nopcode = TAVOR_WQE_SEND_NOPCODE_RDMAR;
1342 break;
1343
1344 case IBT_WRC_CSWAP:
1345 nopcode = TAVOR_WQE_SEND_NOPCODE_ATMCS;
1346 break;
1347
1348 case IBT_WRC_FADD:
1349 nopcode = TAVOR_WQE_SEND_NOPCODE_ATMFA;
1350 break;
1351
1352 case IBT_WRC_BIND:
1353 nopcode = TAVOR_WQE_SEND_NOPCODE_BIND;
1354 break;
1355 }
1356
1357 curr_desc = (uint64_t *)(uintptr_t)((uintptr_t)curr_desc
1358 - qp->qp_desc_off);
1359 next = ((uint64_t)(uintptr_t)curr_desc &
1360 TAVOR_WQE_NDA_MASK) << 32;
1361 next = next | ((uint64_t)nopcode << 32);
1362 fence = (curr_wr->wr_flags & IBT_WR_SEND_FENCE) ? 1 : 0;
1363 if (fence) {
1364 next = next | TAVOR_WQE_SEND_FENCE_MASK;
1365 }
1366 next = next | (curr_descsz & TAVOR_WQE_NDS_MASK);
1367
1368 /*
1369 * If a send queue doorbell will be rung for the next
1370 * WQE on the chain, then set the current WQE's "dbd" bit.
1371 * Note: We also update the "dbinfo" structure here to pass
1372 * back information about what should (later) be included
1373 * in the send queue doorbell.
1374 */
1375 if (dbinfo) {
1376 next = next | TAVOR_WQE_DBD_MASK;
1377 dbinfo->db_nopcode = nopcode;
1378 dbinfo->db_fence = fence;
1379 }
1380 } else {
1381 next = 0;
1382 }
1383
1384 /*
1385 * If this WQE is supposed to be linked to the previous descriptor,
1386 * then we need to update not only the previous WQE's "next" fields
1387 * but we must also update this WQE's "ctrl" fields (i.e. the "c", "e",
1388 * "s", "i" and "immediate" fields - see tavor_hw.h for more). Note:
1389 * the "e" bit is always hardcoded to zero.
1390 */
1391 if (prev_desc != NULL) {
1392 /*
1393 * If a send queue doorbell will be rung for the next WQE on
1394 * the chain, then update the current WQE's "next" field and
1395 * return.
1396 * Note: We don't want to modify the "ctrl" field here because
1397 * that portion of the previous WQE has already been set
1398 * correctly at some previous point in time.
1399 */
1400 if (dbinfo) {
1401 TAVOR_WQE_LINKFIRST(qp, prev_desc, next);
1402 return;
1403 }
1404
1405 ctrl = 0;
1406
1407 /* Set the "c" (i.e. "signaled") bit appropriately */
1408 if (prev_wr->wr_flags & IBT_WR_SEND_SIGNAL) {
1409 ctrl = ctrl | TAVOR_WQE_SEND_SIGNALED_MASK;
1410 }
1411
1412 /* Set the "s" (i.e. "solicited") bit appropriately */
1413 if (prev_wr->wr_flags & IBT_WR_SEND_SOLICIT) {
1414 ctrl = ctrl | TAVOR_WQE_SEND_SOLICIT_MASK;
1415 }
1416
1417 /* Set the "i" bit and the immediate data appropriately */
1418 if (prev_wr->wr_flags & IBT_WR_SEND_IMMED) {
1419 ctrl = ctrl | TAVOR_WQE_SEND_IMMEDIATE_MASK;
1420 ctrl = ctrl | tavor_wr_get_immediate(prev_wr);
1421 }
1422
1423 TAVOR_WQE_LINKNEXT(qp, prev_desc, ctrl, next);
1424 }
1425 }
1426
1427
1428 /*
1429 * tavor_wqe_mlx_build()
1430 * Context: Can be called from interrupt or base context.
1431 */
1432 static int
1433 tavor_wqe_mlx_build(tavor_state_t *state, tavor_qphdl_t qp,
1434 ibt_send_wr_t *wr, uint64_t *desc, uint_t *size)
1435 {
1436 tavor_hw_udav_t udav;
1437 tavor_ahhdl_t ah;
1438 ib_lrh_hdr_t *lrh;
1439 ib_grh_t *grh;
1440 ib_bth_hdr_t *bth;
1441 ib_deth_hdr_t *deth;
1442 tavor_hw_wqe_sgl_t *ds;
1443 ibt_wr_ds_t *sgl;
1444 uint8_t *mgmtclass, *hpoint, *hcount;
1445 uint64_t data;
1446 uint32_t nds, offset, pktlen;
1447 uint32_t desc_sz, udav_sz;
1448 int i, num_ds;
1449
1450 TAVOR_TNF_ENTER(tavor_wqe_mlx_build);
1451
1452 ASSERT(MUTEX_HELD(&qp->qp_lock));
1453
1454 /* Initialize the information for the Data Segments */
1455 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)desc +
1456 sizeof (tavor_hw_mlx_wqe_nextctrl_t));
1457
1458 /*
1459 * Pull the address handle from the work request and read in
1460 * the contents of the UDAV. This will be used to answer some
1461 * questions about the request.
1462 */
1463 ah = (tavor_ahhdl_t)wr->wr.ud.udwr_dest->ud_ah;
1464 if (ah == NULL) {
1465 TNF_PROBE_0(tavor_wqe_mlx_build_invahhdl_fail,
1466 TAVOR_TNF_ERROR, "");
1467 TAVOR_TNF_EXIT(tavor_wqe_mlx_build);
1468 return (IBT_AH_HDL_INVALID);
1469 }
1470 mutex_enter(&ah->ah_lock);
1471 udav_sz = sizeof (tavor_hw_udav_t) >> 3;
1472 for (i = 0; i < udav_sz; i++) {
1473 data = ddi_get64(ah->ah_udavrsrcp->tr_acchdl,
1474 ((uint64_t *)ah->ah_udavrsrcp->tr_addr + i));
1475 ((uint64_t *)&udav)[i] = data;
1476 }
1477 mutex_exit(&ah->ah_lock);
1478
1479 /*
1480 * If the request is for QP1 and the destination LID is equal to
1481 * the Permissive LID, then return an error. This combination is
1482 * not allowed
1483 */
1484 if ((udav.rlid == IB_LID_PERMISSIVE) &&
1485 (qp->qp_is_special == TAVOR_QP_GSI)) {
1486 TNF_PROBE_0(tavor_wqe_mlx_build_permissiveLIDonQP1_fail,
1487 TAVOR_TNF_ERROR, "");
1488 TAVOR_TNF_EXIT(tavor_wqe_mlx_build);
1489 return (IBT_AH_HDL_INVALID);
1490 }
1491
1492 /*
1493 * Calculate the size of the packet headers, including the GRH
1494 * (if necessary)
1495 */
1496 desc_sz = sizeof (ib_lrh_hdr_t) + sizeof (ib_bth_hdr_t) +
1497 sizeof (ib_deth_hdr_t);
1498 if (udav.grh) {
1499 desc_sz += sizeof (ib_grh_t);
1500 }
1501
1502 /*
1503 * Begin to build the first "inline" data segment for the packet
1504 * headers. Note: By specifying "inline" we can build the contents
1505 * of the MAD packet headers directly into the work queue (as part
1506 * descriptor). This has the advantage of both speeding things up
1507 * and of not requiring the driver to allocate/register any additional
1508 * memory for the packet headers.
1509 */
1510 TAVOR_WQE_BUILD_INLINE(qp, &ds[0], desc_sz);
1511 desc_sz += 4;
1512
1513 /*
1514 * Build Local Route Header (LRH)
1515 * We start here by building the LRH into a temporary location.
1516 * When we have finished we copy the LRH data into the descriptor.
1517 *
1518 * Notice that the VL values are hardcoded. This is not a problem
1519 * because VL15 is decided later based on the value in the MLX
1520 * transport "next/ctrl" header (see the "vl15" bit below), and it
1521 * is otherwise (meaning for QP1) chosen from the SL-to-VL table
1522 * values. This rule does not hold for loopback packets however
1523 * (all of which bypass the SL-to-VL tables) and it is the reason
1524 * that non-QP0 MADs are setup with VL hardcoded to zero below.
1525 *
1526 * Notice also that Source LID is hardcoded to the Permissive LID
1527 * (0xFFFF). This is also not a problem because if the Destination
1528 * LID is not the Permissive LID, then the "slr" value in the MLX
1529 * transport "next/ctrl" header will be set to zero and the hardware
1530 * will pull the LID from value in the port.
1531 */
1532 lrh = (ib_lrh_hdr_t *)((uintptr_t)&ds[0] + 4);
1533 pktlen = (desc_sz + 0x100) >> 2;
1534 TAVOR_WQE_BUILD_MLX_LRH(lrh, qp, udav, pktlen);
1535
1536 /*
1537 * Build Global Route Header (GRH)
1538 * This is only built if necessary as defined by the "grh" bit in
1539 * the address vector. Note: We also calculate the offset to the
1540 * next header (BTH) based on whether or not the "grh" bit is set.
1541 */
1542 if (udav.grh) {
1543 /*
1544 * If the request is for QP0, then return an error. The
1545 * combination of global routine (GRH) and QP0 is not allowed.
1546 */
1547 if (qp->qp_is_special == TAVOR_QP_SMI) {
1548 TNF_PROBE_0(tavor_wqe_mlx_build_GRHonQP0_fail,
1549 TAVOR_TNF_ERROR, "");
1550 TAVOR_TNF_EXIT(tavor_wqe_mlx_build);
1551 return (IBT_AH_HDL_INVALID);
1552 }
1553 grh = (ib_grh_t *)((uintptr_t)lrh + sizeof (ib_lrh_hdr_t));
1554 TAVOR_WQE_BUILD_MLX_GRH(state, grh, qp, udav, pktlen);
1555
1556 bth = (ib_bth_hdr_t *)((uintptr_t)grh + sizeof (ib_grh_t));
1557 } else {
1558 bth = (ib_bth_hdr_t *)((uintptr_t)lrh + sizeof (ib_lrh_hdr_t));
1559 }
1560
1561
1562 /*
1563 * Build Base Transport Header (BTH)
1564 * Notice that the M, PadCnt, and TVer fields are all set
1565 * to zero implicitly. This is true for all Management Datagrams
1566 * MADs whether GSI are SMI.
1567 */
1568 TAVOR_WQE_BUILD_MLX_BTH(state, bth, qp, wr);
1569
1570 /*
1571 * Build Datagram Extended Transport Header (DETH)
1572 */
1573 deth = (ib_deth_hdr_t *)((uintptr_t)bth + sizeof (ib_bth_hdr_t));
1574 TAVOR_WQE_BUILD_MLX_DETH(deth, qp);
1575
1576 /* Ensure that the Data Segment is aligned on a 16-byte boundary */
1577 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)deth + sizeof (ib_deth_hdr_t));
1578 ds = (tavor_hw_wqe_sgl_t *)(((uintptr_t)ds + 0xF) & ~0xF);
1579 nds = wr->wr_nds;
1580 sgl = wr->wr_sgl;
1581 num_ds = 0;
1582
1583 /*
1584 * Now fill in the Data Segments (SGL) for the MLX WQE based on the
1585 * values set up above (i.e. "sgl", "nds", and the "ds" pointer
1586 * Start by checking for a valid number of SGL entries
1587 */
1588 if (nds > qp->qp_sq_sgl) {
1589 TNF_PROBE_0(tavor_wqe_mlx_build_toomanysgl_fail,
1590 TAVOR_TNF_ERROR, "");
1591 TAVOR_TNF_EXIT(tavor_wqe_mlx_build);
1592 return (IBT_QP_SGL_LEN_INVALID);
1593 }
1594
1595 /*
1596 * For each SGL in the Send Work Request, fill in the MLX WQE's data
1597 * segments. Note: We skip any SGL with zero size because Tavor
1598 * hardware cannot handle a zero for "byte_cnt" in the WQE. Actually
1599 * the encoding for zero means a 2GB transfer. Because of this special
1600 * encoding in the hardware, we mask the requested length with
1601 * TAVOR_WQE_SGL_BYTE_CNT_MASK (so that 2GB will end up encoded as
1602 * zero.)
1603 */
1604 mgmtclass = hpoint = hcount = NULL;
1605 offset = 0;
1606 for (i = 0; i < nds; i++) {
1607 if (sgl[i].ds_len == 0) {
1608 continue;
1609 }
1610
1611 /*
1612 * Fill in the Data Segment(s) for the MLX send WQE, using
1613 * the information contained in the scatter-gather list of
1614 * the work request.
1615 */
1616 TAVOR_WQE_BUILD_DATA_SEG(qp, &ds[num_ds], &sgl[i]);
1617
1618 /*
1619 * Search through the contents of all MADs posted to QP0 to
1620 * initialize pointers to the places where Directed Route "hop
1621 * pointer", "hop count", and "mgmtclass" would be. Tavor
1622 * needs these updated (i.e. incremented or decremented, as
1623 * necessary) by software.
1624 */
1625 if (qp->qp_is_special == TAVOR_QP_SMI) {
1626
1627 TAVOR_SPECIAL_QP_DRMAD_GET_MGMTCLASS(mgmtclass,
1628 offset, sgl[i].ds_va, sgl[i].ds_len);
1629
1630 TAVOR_SPECIAL_QP_DRMAD_GET_HOPPOINTER(hpoint,
1631 offset, sgl[i].ds_va, sgl[i].ds_len);
1632
1633 TAVOR_SPECIAL_QP_DRMAD_GET_HOPCOUNT(hcount,
1634 offset, sgl[i].ds_va, sgl[i].ds_len);
1635
1636 offset += sgl[i].ds_len;
1637 }
1638 num_ds++;
1639 }
1640
1641 /*
1642 * Tavor's Directed Route MADs need to have the "hop pointer"
1643 * incremented/decremented (as necessary) depending on whether it is
1644 * currently less than or greater than the "hop count" (i.e. whether
1645 * the MAD is a request or a response.)
1646 */
1647 if (qp->qp_is_special == TAVOR_QP_SMI) {
1648 TAVOR_SPECIAL_QP_DRMAD_DO_HOPPOINTER_MODIFY(*mgmtclass,
1649 *hpoint, *hcount);
1650 }
1651
1652 /*
1653 * Now fill in the ICRC Data Segment. This data segment is inlined
1654 * just like the packets headers above, but it is only four bytes and
1655 * set to zero (to indicate that we wish the hardware to generate ICRC.
1656 */
1657 TAVOR_WQE_BUILD_INLINE_ICRC(qp, &ds[num_ds], 4, 0);
1658 num_ds++;
1659
1660 /* Return the size of descriptor (in 16-byte chunks) */
1661 *size = ((uintptr_t)&ds[num_ds] - (uintptr_t)desc) >> 0x4;
1662
1663 TAVOR_TNF_EXIT(tavor_wqe_mlx_build);
1664 return (DDI_SUCCESS);
1665 }
1666
1667
1668 /*
1669 * tavor_wqe_mlx_linknext()
1670 * Context: Can be called from interrupt or base context.
1671 */
1672 static void
1673 tavor_wqe_mlx_linknext(ibt_send_wr_t *prev_wr, uint64_t *curr_desc,
1674 uint_t curr_descsz, uint64_t *prev_desc, tavor_sw_wqe_dbinfo_t *dbinfo,
1675 tavor_qphdl_t qp)
1676 {
1677 tavor_hw_udav_t udav;
1678 tavor_ahhdl_t ah;
1679 uint64_t next, ctrl, data;
1680 uint_t nopcode;
1681 uint_t udav_sz;
1682 int i;
1683
1684 /*
1685 * Calculate the "next" field of the descriptor. This amounts to
1686 * setting up the "next_wqe_addr", "nopcode", and "nds" fields (see
1687 * tavor_hw.h for more). Note: If there is no next descriptor (i.e.
1688 * if the current descriptor is the last WQE on the chain), then set
1689 * "next" to zero.
1690 */
1691 if (curr_desc != NULL) {
1692 /*
1693 * The only valid Tavor WQE "nopcode" for MLX transport
1694 * requests is the "Send" code.
1695 */
1696 nopcode = TAVOR_WQE_SEND_NOPCODE_SEND;
1697 curr_desc = (uint64_t *)(uintptr_t)((uint64_t)
1698 (uintptr_t)curr_desc - qp->qp_desc_off);
1699 next = (uint64_t)((uintptr_t)curr_desc &
1700 TAVOR_WQE_NDA_MASK) << 32;
1701 next = next | ((uint64_t)nopcode << 32);
1702 next = next | (curr_descsz & TAVOR_WQE_NDS_MASK);
1703
1704 /*
1705 * If a send queue doorbell will be rung for the next
1706 * WQE on the chain, then set the current WQE's "dbd" bit.
1707 * Note: We also update the "dbinfo" structure here to pass
1708 * back information about what should (later) be included
1709 * in the send queue doorbell.
1710 */
1711 if (dbinfo) {
1712 next = next | TAVOR_WQE_DBD_MASK;
1713 dbinfo->db_nopcode = nopcode;
1714 dbinfo->db_fence = 0;
1715 }
1716 } else {
1717 next = 0;
1718 }
1719
1720 /*
1721 * If this WQE is supposed to be linked to the previous descriptor,
1722 * then we need to update not only the previous WQE's "next" fields
1723 * but we must also update this WQE's "ctrl" fields (i.e. the "vl15",
1724 * "slr", "max_srate", "sl", "c", "e", "rlid", and "vcrc" fields -
1725 * see tavor_hw.h for more) Note: the "e" bit and "vcrc" fields are
1726 * always hardcoded to zero.
1727 */
1728 if (prev_desc != NULL) {
1729 /*
1730 * If a send queue doorbell will be rung for the next WQE on
1731 * the chain, then update the current WQE's "next" field and
1732 * return.
1733 * Note: We don't want to modify the "ctrl" field here because
1734 * that portion of the previous WQE has already been set
1735 * correctly at some previous point in time.
1736 */
1737 if (dbinfo) {
1738 TAVOR_WQE_LINKFIRST(qp, prev_desc, next);
1739 return;
1740 }
1741
1742 /*
1743 * Pull the address handle from the work request and read in
1744 * the contents of the UDAV. This will be used to answer some
1745 * questions about the request.
1746 */
1747 ah = (tavor_ahhdl_t)prev_wr->wr.ud.udwr_dest->ud_ah;
1748 mutex_enter(&ah->ah_lock);
1749 udav_sz = sizeof (tavor_hw_udav_t) >> 3;
1750 for (i = 0; i < udav_sz; i++) {
1751 data = ddi_get64(ah->ah_udavrsrcp->tr_acchdl,
1752 ((uint64_t *)ah->ah_udavrsrcp->tr_addr + i));
1753 ((uint64_t *)&udav)[i] = data;
1754 }
1755 mutex_exit(&ah->ah_lock);
1756
1757 ctrl = 0;
1758
1759 /* Only QP0 uses VL15, otherwise use VL in the packet */
1760 if (qp->qp_is_special == TAVOR_QP_SMI) {
1761 ctrl = ctrl | TAVOR_WQE_MLXHDR_VL15_MASK;
1762 }
1763
1764 /*
1765 * The SLR (Source LID Replace) bit determines whether the
1766 * source LID for an outgoing MLX packet should come from the
1767 * PortInfo (SLR = 0) or should be left as it is in the
1768 * descriptor (SLR = 1). The latter is necessary for packets
1769 * to be sent with the Permissive LID.
1770 */
1771 if (udav.rlid == IB_LID_PERMISSIVE) {
1772 ctrl = ctrl | TAVOR_WQE_MLXHDR_SLR_MASK;
1773 }
1774
1775 /* Fill in the max static rate from the address handle */
1776 ctrl = ctrl | ((uint64_t)udav.max_stat_rate <<
1777 TAVOR_WQE_MLXHDR_SRATE_SHIFT);
1778
1779 /* All VL15 (i.e. SMI) traffic is required to use SL 0 */
1780 if (qp->qp_is_special != TAVOR_QP_SMI) {
1781 ctrl = ctrl | ((uint64_t)udav.sl <<
1782 TAVOR_WQE_MLXHDR_SL_SHIFT);
1783 }
1784
1785 /* Set the "c" (i.e. "signaled") bit appropriately */
1786 if (prev_wr->wr_flags & IBT_WR_SEND_SIGNAL) {
1787 ctrl = ctrl | TAVOR_WQE_MLXHDR_SIGNALED_MASK;
1788 }
1789
1790 /* Fill in the destination LID from the address handle */
1791 ctrl = ctrl | ((uint64_t)udav.rlid <<
1792 TAVOR_WQE_MLXHDR_RLID_SHIFT);
1793
1794 TAVOR_WQE_LINKNEXT(qp, prev_desc, ctrl, next);
1795 }
1796 }
1797
1798
1799 /*
1800 * tavor_wqe_recv_build()
1801 * Context: Can be called from interrupt or base context.
1802 */
1803 /* ARGSUSED */
1804 static int
1805 tavor_wqe_recv_build(tavor_state_t *state, tavor_qphdl_t qp,
1806 ibt_recv_wr_t *wr, uint64_t *desc, uint_t *size)
1807 {
1808 tavor_hw_wqe_sgl_t *ds;
1809 int i, num_ds;
1810
1811 TAVOR_TNF_ENTER(tavor_wqe_recv_build);
1812
1813 ASSERT(MUTEX_HELD(&qp->qp_lock));
1814
1815 /* Check that work request transport type is valid */
1816 if ((qp->qp_serv_type != TAVOR_QP_UD) &&
1817 (qp->qp_serv_type != TAVOR_QP_RC) &&
1818 (qp->qp_serv_type != TAVOR_QP_UC)) {
1819 TNF_PROBE_0(tavor_build_recv_wqe_inv_servtype_fail,
1820 TAVOR_TNF_ERROR, "");
1821 TAVOR_TNF_EXIT(tavor_build_recv_wqe);
1822 return (IBT_QP_SRV_TYPE_INVALID);
1823 }
1824
1825 /* Fill in the Data Segments (SGL) for the Recv WQE */
1826 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)desc +
1827 sizeof (tavor_hw_rcv_wqe_nextctrl_t));
1828 num_ds = 0;
1829
1830 /* Check for valid number of SGL entries */
1831 if (wr->wr_nds > qp->qp_rq_sgl) {
1832 TNF_PROBE_0(tavor_wqe_recv_build_toomanysgl_fail,
1833 TAVOR_TNF_ERROR, "");
1834 TAVOR_TNF_EXIT(tavor_wqe_recv_build);
1835 return (IBT_QP_SGL_LEN_INVALID);
1836 }
1837
1838 /*
1839 * For each SGL in the Recv Work Request, fill in the Recv WQE's data
1840 * segments. Note: We skip any SGL with zero size because Tavor
1841 * hardware cannot handle a zero for "byte_cnt" in the WQE. Actually
1842 * the encoding for zero means a 2GB transfer. Because of this special
1843 * encoding in the hardware, we mask the requested length with
1844 * TAVOR_WQE_SGL_BYTE_CNT_MASK (so that 2GB will end up encoded as
1845 * zero.)
1846 */
1847 for (i = 0; i < wr->wr_nds; i++) {
1848 if (wr->wr_sgl[i].ds_len == 0) {
1849 continue;
1850 }
1851
1852 /*
1853 * Fill in the Data Segment(s) for the receive WQE, using the
1854 * information contained in the scatter-gather list of the
1855 * work request.
1856 */
1857 TAVOR_WQE_BUILD_DATA_SEG(qp, &ds[num_ds], &wr->wr_sgl[i]);
1858 num_ds++;
1859 }
1860
1861 /* Return the size of descriptor (in 16-byte chunks) */
1862 *size = ((uintptr_t)&ds[num_ds] - (uintptr_t)desc) >> 0x4;
1863
1864 TAVOR_TNF_EXIT(tavor_wqe_recv_build);
1865 return (DDI_SUCCESS);
1866 }
1867
1868
1869 /*
1870 * tavor_wqe_recv_linknext()
1871 * Context: Can be called from interrupt or base context.
1872 */
1873 static void
1874 tavor_wqe_recv_linknext(uint64_t *curr_desc, uint_t curr_descsz,
1875 uint64_t *prev_desc, tavor_qphdl_t qp)
1876 {
1877 uint64_t next;
1878
1879 /*
1880 * Calculate the "next" field of the descriptor. This amounts to
1881 * setting up the "next_wqe_addr", "dbd", and "nds" fields (see
1882 * tavor_hw.h for more). Note: If there is no next descriptor (i.e.
1883 * if the current descriptor is the last WQE on the chain), then set
1884 * "next" field to TAVOR_WQE_DBD_MASK. This is because the Tavor
1885 * hardware requires the "dbd" bit to be set to one for all Recv WQEs.
1886 * In either case, we must add a single bit in the "reserved" field
1887 * (TAVOR_RCV_WQE_NDA0_WA_MASK) following the NDA. This is the
1888 * workaround for a known Tavor errata that can cause Recv WQEs with
1889 * zero in the NDA field to behave improperly.
1890 */
1891 if (curr_desc != NULL) {
1892 curr_desc = (uint64_t *)(uintptr_t)((uintptr_t)curr_desc -
1893 qp->qp_desc_off);
1894 next = (uint64_t)((uintptr_t)curr_desc &
1895 TAVOR_WQE_NDA_MASK) << 32;
1896 next = next | (curr_descsz & TAVOR_WQE_NDS_MASK) |
1897 TAVOR_WQE_DBD_MASK | TAVOR_RCV_WQE_NDA0_WA_MASK;
1898 } else {
1899 next = TAVOR_WQE_DBD_MASK | TAVOR_RCV_WQE_NDA0_WA_MASK;
1900 }
1901
1902 /*
1903 * If this WQE is supposed to be linked to the previous descriptor,
1904 * then we need to update not only the previous WQE's "next" fields
1905 * but we must also update this WQE's "ctrl" fields (i.e. the "c" and
1906 * "e" bits - see tavor_hw.h for more). Note: both the "c" and "e"
1907 * bits are always hardcoded to zero.
1908 */
1909 if (prev_desc != NULL) {
1910 TAVOR_WQE_LINKNEXT(qp, prev_desc, 0, next);
1911 }
1912 }
1913
1914
1915 /*
1916 * tavor_wqe_srq_build()
1917 * Context: Can be called from interrupt or base context.
1918 */
1919 /* ARGSUSED */
1920 static int
1921 tavor_wqe_srq_build(tavor_state_t *state, tavor_srqhdl_t srq,
1922 ibt_recv_wr_t *wr, uint64_t *desc)
1923 {
1924 tavor_hw_wqe_sgl_t *ds;
1925 ibt_wr_ds_t end_sgl;
1926 int i, num_ds;
1927
1928 TAVOR_TNF_ENTER(tavor_wqe_recv_build);
1929
1930 ASSERT(MUTEX_HELD(&srq->srq_lock));
1931
1932 /* Fill in the Data Segments (SGL) for the Recv WQE */
1933 ds = (tavor_hw_wqe_sgl_t *)((uintptr_t)desc +
1934 sizeof (tavor_hw_rcv_wqe_nextctrl_t));
1935 num_ds = 0;
1936
1937 /* Check for valid number of SGL entries */
1938 if (wr->wr_nds > srq->srq_wq_sgl) {
1939 TNF_PROBE_0(tavor_wqe_srq_build_toomanysgl_fail,
1940 TAVOR_TNF_ERROR, "");
1941 TAVOR_TNF_EXIT(tavor_wqe_srq_build);
1942 return (IBT_QP_SGL_LEN_INVALID);
1943 }
1944
1945 /*
1946 * For each SGL in the Recv Work Request, fill in the Recv WQE's data
1947 * segments. Note: We skip any SGL with zero size because Tavor
1948 * hardware cannot handle a zero for "byte_cnt" in the WQE. Actually
1949 * the encoding for zero means a 2GB transfer. Because of this special
1950 * encoding in the hardware, we mask the requested length with
1951 * TAVOR_WQE_SGL_BYTE_CNT_MASK (so that 2GB will end up encoded as
1952 * zero.)
1953 */
1954 for (i = 0; i < wr->wr_nds; i++) {
1955 if (wr->wr_sgl[i].ds_len == 0) {
1956 continue;
1957 }
1958
1959 /*
1960 * Fill in the Data Segment(s) for the receive WQE, using the
1961 * information contained in the scatter-gather list of the
1962 * work request.
1963 */
1964 TAVOR_WQE_BUILD_DATA_SEG_SRQ(srq, &ds[num_ds], &wr->wr_sgl[i]);
1965 num_ds++;
1966 }
1967
1968 /*
1969 * For SRQ, if the number of data segments is less than the maximum
1970 * specified at alloc, then we have to fill in a special "key" entry in
1971 * the sgl entry after the last valid one in this post request. We do
1972 * that here.
1973 */
1974 if (num_ds < srq->srq_wq_sgl) {
1975 end_sgl.ds_va = 0;
1976 end_sgl.ds_len = 0;
1977 end_sgl.ds_key = 0x1;
1978 TAVOR_WQE_BUILD_DATA_SEG_SRQ(srq, &ds[num_ds], &end_sgl);
1979 }
1980
1981 TAVOR_TNF_EXIT(tavor_wqe_srq_build);
1982 return (DDI_SUCCESS);
1983 }
1984
1985
1986 /*
1987 * tavor_wqe_srq_linknext()
1988 * Context: Can be called from interrupt or base context.
1989 */
1990 static void
1991 tavor_wqe_srq_linknext(uint64_t *curr_desc, uint64_t *prev_desc,
1992 tavor_srqhdl_t srq)
1993 {
1994 uint64_t next;
1995
1996 /*
1997 * Calculate the "next" field of the descriptor. This amounts to
1998 * setting up the "next_wqe_addr", "dbd", and "nds" fields (see
1999 * tavor_hw.h for more). Note: If there is no next descriptor (i.e.
2000 * if the current descriptor is the last WQE on the chain), then set
2001 * "next" field to TAVOR_WQE_DBD_MASK. This is because the Tavor
2002 * hardware requires the "dbd" bit to be set to one for all Recv WQEs.
2003 * In either case, we must add a single bit in the "reserved" field
2004 * (TAVOR_RCV_WQE_NDA0_WA_MASK) following the NDA. This is the
2005 * workaround for a known Tavor errata that can cause Recv WQEs with
2006 * zero in the NDA field to behave improperly.
2007 */
2008 if (curr_desc != NULL) {
2009 curr_desc = (uint64_t *)(uintptr_t)((uintptr_t)curr_desc -
2010 srq->srq_desc_off);
2011 next = (uint64_t)((uintptr_t)curr_desc &
2012 TAVOR_WQE_NDA_MASK) << 32;
2013 next = next | TAVOR_WQE_DBD_MASK | TAVOR_RCV_WQE_NDA0_WA_MASK;
2014 } else {
2015 next = TAVOR_RCV_WQE_NDA0_WA_MASK;
2016 }
2017
2018 /*
2019 * If this WQE is supposed to be linked to the previous descriptor,
2020 * then we need to update not only the previous WQE's "next" fields
2021 * but we must also update this WQE's "ctrl" fields (i.e. the "c" and
2022 * "e" bits - see tavor_hw.h for more). Note: both the "c" and "e"
2023 * bits are always hardcoded to zero.
2024 */
2025 if (prev_desc != NULL) {
2026 TAVOR_WQE_LINKNEXT_SRQ(srq, prev_desc, 0, next);
2027 }
2028 }
2029
2030
2031 /*
2032 * tavor_wr_get_immediate()
2033 * Context: Can be called from interrupt or base context.
2034 */
2035 static uint32_t
2036 tavor_wr_get_immediate(ibt_send_wr_t *wr)
2037 {
2038 /*
2039 * This routine extracts the "immediate data" from the appropriate
2040 * location in the IBTF work request. Because of the way the
2041 * work request structure is defined, the location for this data
2042 * depends on the actual work request operation type.
2043 */
2044
2045 /* For RDMA Write, test if RC or UC */
2046 if (wr->wr_opcode == IBT_WRC_RDMAW) {
2047 if (wr->wr_trans == IBT_RC_SRV) {
2048 return (wr->wr.rc.rcwr.rdma.rdma_immed);
2049 } else { /* IBT_UC_SRV */
2050 return (wr->wr.uc.ucwr.rdma.rdma_immed);
2051 }
2052 }
2053
2054 /* For Send, test if RC, UD, or UC */
2055 if (wr->wr_opcode == IBT_WRC_SEND) {
2056 if (wr->wr_trans == IBT_RC_SRV) {
2057 return (wr->wr.rc.rcwr.send_immed);
2058 } else if (wr->wr_trans == IBT_UD_SRV) {
2059 return (wr->wr.ud.udwr_immed);
2060 } else { /* IBT_UC_SRV */
2061 return (wr->wr.uc.ucwr.send_immed);
2062 }
2063 }
2064
2065 /*
2066 * If any other type of request, then immediate is undefined
2067 */
2068 return (0);
2069 }
2070
2071
2072 /*
2073 * tavor_wqe_sync()
2074 * Context: Can be called from interrupt or base context.
2075 */
2076 static void
2077 tavor_wqe_sync(void *hdl, uint_t sync_from, uint_t sync_to,
2078 uint_t sync_type, uint_t flag)
2079 {
2080 tavor_qphdl_t qp;
2081 tavor_srqhdl_t srq;
2082 uint_t is_sync_req;
2083 uint64_t *wqe_from, *wqe_to, *wqe_base, *wqe_top;
2084 ddi_dma_handle_t dmahdl;
2085 off_t offset;
2086 size_t length;
2087 uint32_t qsize;
2088 int status;
2089
2090 TAVOR_TNF_ENTER(tavor_wqe_sync);
2091
2092 if (sync_type == TAVOR_WR_SRQ) {
2093 srq = (tavor_srqhdl_t)hdl;
2094 is_sync_req = srq->srq_sync;
2095 /* Get the DMA handle from SRQ context */
2096 dmahdl = srq->srq_mrhdl->mr_bindinfo.bi_dmahdl;
2097 } else {
2098 qp = (tavor_qphdl_t)hdl;
2099 is_sync_req = qp->qp_sync;
2100 /* Get the DMA handle from QP context */
2101 dmahdl = qp->qp_mrhdl->mr_bindinfo.bi_dmahdl;
2102 }
2103
2104 /* Determine if the work queues need to be synced or not */
2105 if (is_sync_req == 0) {
2106 TAVOR_TNF_EXIT(tavor_wqe_sync);
2107 return;
2108 }
2109
2110 /*
2111 * Depending on the type of the work queue, we grab information
2112 * about the address ranges we need to DMA sync.
2113 */
2114 if (sync_type == TAVOR_WR_SEND) {
2115 wqe_from = TAVOR_QP_SQ_ENTRY(qp, sync_from);
2116 wqe_to = TAVOR_QP_SQ_ENTRY(qp, sync_to);
2117 qsize = qp->qp_sq_bufsz;
2118
2119 wqe_base = TAVOR_QP_SQ_ENTRY(qp, 0);
2120 wqe_top = TAVOR_QP_SQ_ENTRY(qp, qsize);
2121 } else if (sync_type == TAVOR_WR_RECV) {
2122 wqe_from = TAVOR_QP_RQ_ENTRY(qp, sync_from);
2123 wqe_to = TAVOR_QP_RQ_ENTRY(qp, sync_to);
2124 qsize = qp->qp_rq_bufsz;
2125
2126 wqe_base = TAVOR_QP_RQ_ENTRY(qp, 0);
2127 wqe_top = TAVOR_QP_RQ_ENTRY(qp, qsize);
2128 } else {
2129 wqe_from = TAVOR_SRQ_WQ_ENTRY(srq, sync_from);
2130 wqe_to = TAVOR_SRQ_WQ_ENTRY(srq, sync_to);
2131 qsize = srq->srq_wq_bufsz;
2132
2133 wqe_base = TAVOR_SRQ_WQ_ENTRY(srq, 0);
2134 wqe_top = TAVOR_SRQ_WQ_ENTRY(srq, qsize);
2135 }
2136
2137 /*
2138 * There are two possible cases for the beginning and end of the WQE
2139 * chain we are trying to sync. Either this is the simple case, where
2140 * the end of the chain is below the beginning of the chain, or it is
2141 * the "wrap-around" case, where the end of the chain has wrapped over
2142 * the end of the queue. In the former case, we simply need to
2143 * calculate the span from beginning to end and sync it. In the latter
2144 * case, however, we need to calculate the span from the top of the
2145 * work queue to the end of the chain and sync that, and then we need
2146 * to find the other portion (from beginning of chain to end of queue)
2147 * and sync that as well. Note: if the "top to end" span is actually
2148 * zero length, then we don't do a DMA sync because a zero length DMA
2149 * sync unnecessarily syncs the entire work queue.
2150 */
2151 if (wqe_to > wqe_from) {
2152 /* "From Beginning to End" */
2153 offset = (off_t)((uintptr_t)wqe_from - (uintptr_t)wqe_base);
2154 length = (size_t)((uintptr_t)wqe_to - (uintptr_t)wqe_from);
2155
2156 status = ddi_dma_sync(dmahdl, offset, length, flag);
2157 if (status != DDI_SUCCESS) {
2158 TNF_PROBE_0(tavor_wqe_sync_fail, TAVOR_TNF_ERROR, "");
2159 TAVOR_TNF_EXIT(tavor_wqe_sync);
2160 return;
2161 }
2162 } else {
2163 /* "From Top to End" */
2164 offset = (off_t)0;
2165 length = (size_t)((uintptr_t)wqe_to - (uintptr_t)wqe_base);
2166 if (length) {
2167 status = ddi_dma_sync(dmahdl, offset, length, flag);
2168 if (status != DDI_SUCCESS) {
2169 TNF_PROBE_0(tavor_wqe_sync_fail,
2170 TAVOR_TNF_ERROR, "");
2171 TAVOR_TNF_EXIT(tavor_wqe_sync);
2172 return;
2173 }
2174 }
2175
2176 /* "From Beginning to Bottom" */
2177 offset = (off_t)((uintptr_t)wqe_from - (uintptr_t)wqe_base);
2178 length = (size_t)((uintptr_t)wqe_top - (uintptr_t)wqe_from);
2179 status = ddi_dma_sync(dmahdl, offset, length, flag);
2180 if (status != DDI_SUCCESS) {
2181 TNF_PROBE_0(tavor_wqe_sync_fail, TAVOR_TNF_ERROR, "");
2182 TAVOR_TNF_EXIT(tavor_wqe_sync);
2183 return;
2184 }
2185 }
2186
2187 TAVOR_TNF_EXIT(tavor_wqe_sync);
2188 }
2189
2190
2191 /*
2192 * tavor_wr_bind_check()
2193 * Context: Can be called from interrupt or base context.
2194 */
2195 static int
2196 tavor_wr_bind_check(tavor_state_t *state, ibt_send_wr_t *wr)
2197 {
2198 ibt_bind_flags_t bind_flags;
2199 uint64_t vaddr, len;
2200 uint64_t reg_start_addr, reg_end_addr;
2201 tavor_mwhdl_t mw;
2202 tavor_mrhdl_t mr;
2203 tavor_rsrc_t *mpt;
2204 uint32_t new_rkey;
2205
2206 TAVOR_TNF_ENTER(tavor_wr_bind_check);
2207
2208 /* Check for a valid Memory Window handle in the WR */
2209 mw = (tavor_mwhdl_t)wr->wr.rc.rcwr.bind->bind_ibt_mw_hdl;
2210 if (mw == NULL) {
2211 TNF_PROBE_0(tavor_wr_bind_check_invmwhdl_fail,
2212 TAVOR_TNF_ERROR, "");
2213 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2214 return (IBT_MW_HDL_INVALID);
2215 }
2216
2217 /* Check for a valid Memory Region handle in the WR */
2218 mr = (tavor_mrhdl_t)wr->wr.rc.rcwr.bind->bind_ibt_mr_hdl;
2219 if (mr == NULL) {
2220 TNF_PROBE_0(tavor_wr_bind_check_invmrhdl_fail,
2221 TAVOR_TNF_ERROR, "");
2222 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2223 return (IBT_MR_HDL_INVALID);
2224 }
2225
2226 mutex_enter(&mr->mr_lock);
2227 mutex_enter(&mw->mr_lock);
2228
2229 /*
2230 * Check here to see if the memory region has already been partially
2231 * deregistered as a result of a tavor_umap_umemlock_cb() callback.
2232 * If so, this is an error, return failure.
2233 */
2234 if ((mr->mr_is_umem) && (mr->mr_umemcookie == NULL)) {
2235 mutex_exit(&mr->mr_lock);
2236 mutex_exit(&mw->mr_lock);
2237 TNF_PROBE_0(tavor_wr_bind_check_invmrhdl2_fail,
2238 TAVOR_TNF_ERROR, "");
2239 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2240 return (IBT_MR_HDL_INVALID);
2241 }
2242
2243 /* Check for a valid Memory Window RKey (i.e. a matching RKey) */
2244 if (mw->mr_rkey != wr->wr.rc.rcwr.bind->bind_rkey) {
2245 mutex_exit(&mr->mr_lock);
2246 mutex_exit(&mw->mr_lock);
2247 TNF_PROBE_0(tavor_wr_bind_check_invrkey_fail,
2248 TAVOR_TNF_ERROR, "");
2249 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2250 return (IBT_MR_RKEY_INVALID);
2251 }
2252
2253 /* Check for a valid Memory Region LKey (i.e. a matching LKey) */
2254 if (mr->mr_lkey != wr->wr.rc.rcwr.bind->bind_lkey) {
2255 mutex_exit(&mr->mr_lock);
2256 mutex_exit(&mw->mr_lock);
2257 TNF_PROBE_0(tavor_wr_bind_check_invlkey_fail,
2258 TAVOR_TNF_ERROR, "");
2259 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2260 return (IBT_MR_LKEY_INVALID);
2261 }
2262
2263 /*
2264 * Now check for valid "vaddr" and "len". Note: We don't check the
2265 * "vaddr" range when "len == 0" (i.e. on unbind operations)
2266 */
2267 len = wr->wr.rc.rcwr.bind->bind_len;
2268 if (len != 0) {
2269 vaddr = wr->wr.rc.rcwr.bind->bind_va;
2270 reg_start_addr = mr->mr_bindinfo.bi_addr;
2271 reg_end_addr = mr->mr_bindinfo.bi_addr +
2272 (mr->mr_bindinfo.bi_len - 1);
2273 if ((vaddr < reg_start_addr) || (vaddr > reg_end_addr)) {
2274 mutex_exit(&mr->mr_lock);
2275 mutex_exit(&mw->mr_lock);
2276 TNF_PROBE_0(tavor_wr_bind_check_inv_vaddr_fail,
2277 TAVOR_TNF_ERROR, "");
2278 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2279 return (IBT_MR_VA_INVALID);
2280 }
2281 vaddr = (vaddr + len) - 1;
2282 if (vaddr > reg_end_addr) {
2283 mutex_exit(&mr->mr_lock);
2284 mutex_exit(&mw->mr_lock);
2285 TNF_PROBE_0(tavor_wr_bind_check_invlen_fail,
2286 TAVOR_TNF_ERROR, "");
2287 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2288 return (IBT_MR_LEN_INVALID);
2289 }
2290 }
2291
2292 /*
2293 * Validate the bind access flags. Remote Write and Atomic access for
2294 * the Memory Window require that Local Write access be set in the
2295 * corresponding Memory Region.
2296 */
2297 bind_flags = wr->wr.rc.rcwr.bind->bind_flags;
2298 if (((bind_flags & IBT_WR_BIND_WRITE) ||
2299 (bind_flags & IBT_WR_BIND_ATOMIC)) &&
2300 !(mr->mr_accflag & IBT_MR_LOCAL_WRITE)) {
2301 mutex_exit(&mr->mr_lock);
2302 mutex_exit(&mw->mr_lock);
2303 TNF_PROBE_0(tavor_wr_bind_check_invflags_fail,
2304 TAVOR_TNF_ERROR, "");
2305 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2306 return (IBT_MR_ACCESS_REQ_INVALID);
2307 }
2308
2309 /* Calculate the new RKey for the Memory Window */
2310 mpt = mw->mr_mptrsrcp;
2311 tavor_mr_keycalc(state, mpt->tr_indx, &new_rkey);
2312
2313 wr->wr.rc.rcwr.bind->bind_rkey_out = new_rkey;
2314 mw->mr_rkey = new_rkey;
2315
2316 mutex_exit(&mr->mr_lock);
2317 mutex_exit(&mw->mr_lock);
2318 TAVOR_TNF_EXIT(tavor_wr_bind_check);
2319 return (DDI_SUCCESS);
2320 }
2321
2322
2323 /*
2324 * tavor_wrid_from_reset_handling()
2325 * Context: Can be called from interrupt or base context.
2326 */
2327 int
2328 tavor_wrid_from_reset_handling(tavor_state_t *state, tavor_qphdl_t qp)
2329 {
2330 tavor_workq_hdr_t *swq, *rwq;
2331 tavor_wrid_list_hdr_t *s_wridlist, *r_wridlist;
2332 uint_t create_new_swq = 0, create_new_rwq = 0;
2333 uint_t create_wql = 0;
2334 uint_t qp_srq_en;
2335
2336 TAVOR_TNF_ENTER(tavor_wrid_from_reset_handling);
2337
2338 /*
2339 * For each of this QP's Work Queues, make sure we have a (properly
2340 * initialized) Work Request ID list attached to the relevant
2341 * completion queue. Grab the CQ lock(s) before manipulating the
2342 * lists.
2343 */
2344 tavor_wrid_wqhdr_lock_both(qp);
2345 swq = tavor_wrid_wqhdr_find(qp->qp_sq_cqhdl, qp->qp_qpnum,
2346 TAVOR_WR_SEND);
2347 if (swq == NULL) {
2348 /* Couldn't find matching work queue header, create it */
2349 create_new_swq = create_wql = 1;
2350 swq = tavor_wrid_wqhdr_create(state, qp->qp_sq_cqhdl,
2351 qp->qp_qpnum, TAVOR_WR_SEND, create_wql);
2352 if (swq == NULL) {
2353 /*
2354 * If we couldn't find/allocate space for the workq
2355 * header, then drop the lock(s) and return failure.
2356 */
2357 tavor_wrid_wqhdr_unlock_both(qp);
2358 TNF_PROBE_0(tavor_wrid_from_reset_handling_wqhdr_fail,
2359 TAVOR_TNF_ERROR, "");
2360 TAVOR_TNF_EXIT(tavor_wrid_from_reset_handling);
2361 return (ibc_get_ci_failure(0));
2362 }
2363 }
2364 _NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*swq))
2365 qp->qp_sq_wqhdr = swq;
2366 swq->wq_size = qp->qp_sq_bufsz;
2367 swq->wq_head = 0;
2368 swq->wq_tail = 0;
2369 swq->wq_full = 0;
2370
2371 /*
2372 * Allocate space for the tavor_wrid_entry_t container
2373 */
2374 s_wridlist = tavor_wrid_get_list(swq->wq_size);
2375 if (s_wridlist == NULL) {
2376 /*
2377 * If we couldn't allocate space for tracking the WRID
2378 * entries, then cleanup the workq header from above (if
2379 * necessary, i.e. if we created the workq header). Then
2380 * drop the lock(s) and return failure.
2381 */
2382 if (create_new_swq) {
2383 tavor_cq_wqhdr_remove(qp->qp_sq_cqhdl, swq);
2384 }
2385
2386 tavor_wrid_wqhdr_unlock_both(qp);
2387 TNF_PROBE_0(tavor_wrid_from_reset_handling_wridlist_fail,
2388 TAVOR_TNF_ERROR, "");
2389 TAVOR_TNF_EXIT(tavor_wrid_from_reset_handling);
2390 return (ibc_get_ci_failure(0));
2391 }
2392 _NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*s_wridlist))
2393 s_wridlist->wl_wqhdr = swq;
2394
2395 /* Chain the new WRID list container to the workq hdr list */
2396 mutex_enter(&swq->wq_wrid_wql->wql_lock);
2397 tavor_wrid_wqhdr_add(swq, s_wridlist);
2398 mutex_exit(&swq->wq_wrid_wql->wql_lock);
2399
2400 qp_srq_en = qp->qp_srq_en;
2401
2402 #ifdef __lock_lint
2403 mutex_enter(&qp->qp_srqhdl->srq_lock);
2404 #else
2405 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED) {
2406 mutex_enter(&qp->qp_srqhdl->srq_lock);
2407 }
2408 #endif
2409 /*
2410 * Now we repeat all the above operations for the receive work queue,
2411 * or shared receive work queue.
2412 *
2413 * Note: We still use the 'qp_rq_cqhdl' even in the SRQ case.
2414 */
2415 rwq = tavor_wrid_wqhdr_find(qp->qp_rq_cqhdl, qp->qp_qpnum,
2416 TAVOR_WR_RECV);
2417 if (rwq == NULL) {
2418 create_new_rwq = create_wql = 1;
2419
2420 /*
2421 * If this QP is associated with an SRQ, and this isn't the
2422 * first QP on the SRQ, then the 'srq_wrid_wql' will already be
2423 * created. Since the WQL is created at 'wqhdr_create' time we
2424 * pass in the flag 'create_wql' here to be 0 if we have
2425 * already created it. And later on below we then next setup
2426 * the WQL and rwq information based off the existing SRQ info.
2427 */
2428 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED &&
2429 qp->qp_srqhdl->srq_wrid_wql != NULL) {
2430 create_wql = 0;
2431 }
2432
2433 rwq = tavor_wrid_wqhdr_create(state, qp->qp_rq_cqhdl,
2434 qp->qp_qpnum, TAVOR_WR_RECV, create_wql);
2435 if (rwq == NULL) {
2436 /*
2437 * If we couldn't find/allocate space for the workq
2438 * header, then free all the send queue resources we
2439 * just allocated and setup (above), drop the lock(s)
2440 * and return failure.
2441 */
2442 mutex_enter(&swq->wq_wrid_wql->wql_lock);
2443 tavor_wrid_wqhdr_remove(swq, s_wridlist);
2444 mutex_exit(&swq->wq_wrid_wql->wql_lock);
2445 if (create_new_swq) {
2446 tavor_cq_wqhdr_remove(qp->qp_sq_cqhdl,
2447 swq);
2448 }
2449
2450 #ifdef __lock_lint
2451 mutex_exit(&qp->qp_srqhdl->srq_lock);
2452 #else
2453 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED) {
2454 mutex_exit(&qp->qp_srqhdl->srq_lock);
2455 }
2456 #endif
2457
2458 tavor_wrid_wqhdr_unlock_both(qp);
2459 TNF_PROBE_0(tavor_wrid_from_reset_handling_wqhdr_fail,
2460 TAVOR_TNF_ERROR, "");
2461 TAVOR_TNF_EXIT(tavor_wrid_from_reset_handling);
2462 return (ibc_get_ci_failure(0));
2463 }
2464 }
2465 _NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*rwq))
2466
2467 /*
2468 * Setup receive workq hdr
2469 *
2470 * If the QP is on an SRQ, we setup the SRQ specific fields, setting
2471 * keeping a copy of the rwq pointer, setting the rwq bufsize
2472 * appropriately, and initializing our part of the WQLock.
2473 *
2474 * In the normal QP case, the QP recv queue bufsize is used.
2475 */
2476 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED) {
2477 rwq->wq_size = qp->qp_srqhdl->srq_wq_bufsz;
2478 if (qp->qp_srqhdl->srq_wrid_wql == NULL) {
2479 qp->qp_srqhdl->srq_wrid_wql = rwq->wq_wrid_wql;
2480 } else {
2481 rwq->wq_wrid_wql = qp->qp_srqhdl->srq_wrid_wql;
2482 }
2483 tavor_wql_refcnt_inc(qp->qp_srqhdl->srq_wrid_wql);
2484
2485 } else {
2486 rwq->wq_size = qp->qp_rq_bufsz;
2487 }
2488
2489 qp->qp_rq_wqhdr = rwq;
2490 rwq->wq_head = 0;
2491 rwq->wq_tail = 0;
2492 rwq->wq_full = 0;
2493
2494 /*
2495 * Allocate space for the tavor_wrid_entry_t container.
2496 *
2497 * If QP is on an SRQ, and the wrq_wridlist is NULL then we must
2498 * allocate the wridlist normally. However, if the srq_wridlist is !=
2499 * NULL, then we know this SRQ has already been initialized, thus the
2500 * wridlist has already been initialized. So we re-use the
2501 * srq_wridlist as the r_wridlist for this QP in this case.
2502 */
2503 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED &&
2504 qp->qp_srqhdl->srq_wridlist != NULL) {
2505 /* Use existing srq_wridlist pointer */
2506 r_wridlist = qp->qp_srqhdl->srq_wridlist;
2507 ASSERT(r_wridlist != NULL);
2508 } else {
2509 /* Allocate memory for the r_wridlist */
2510 r_wridlist = tavor_wrid_get_list(rwq->wq_size);
2511 }
2512
2513 /*
2514 * If the memory allocation failed for r_wridlist (or the SRQ pointer
2515 * is mistakenly NULL), we cleanup our previous swq allocation from
2516 * above
2517 */
2518 if (r_wridlist == NULL) {
2519 /*
2520 * If we couldn't allocate space for tracking the WRID
2521 * entries, then cleanup all the stuff from above. Then
2522 * drop the lock(s) and return failure.
2523 */
2524 mutex_enter(&swq->wq_wrid_wql->wql_lock);
2525 tavor_wrid_wqhdr_remove(swq, s_wridlist);
2526 mutex_exit(&swq->wq_wrid_wql->wql_lock);
2527 if (create_new_swq) {
2528 tavor_cq_wqhdr_remove(qp->qp_sq_cqhdl, swq);
2529 }
2530 if (create_new_rwq) {
2531 tavor_cq_wqhdr_remove(qp->qp_rq_cqhdl, rwq);
2532 }
2533
2534 #ifdef __lock_lint
2535 mutex_exit(&qp->qp_srqhdl->srq_lock);
2536 #else
2537 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED) {
2538 mutex_exit(&qp->qp_srqhdl->srq_lock);
2539 }
2540 #endif
2541
2542 tavor_wrid_wqhdr_unlock_both(qp);
2543 TNF_PROBE_0(tavor_wrid_from_reset_handling_wridlist_fail,
2544 TAVOR_TNF_ERROR, "");
2545 TAVOR_TNF_EXIT(tavor_wrid_from_reset_handling);
2546 return (ibc_get_ci_failure(0));
2547 }
2548 _NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*r_wridlist))
2549
2550 /*
2551 * Initialize the wridlist
2552 *
2553 * In the normal QP case, there is no special initialization needed.
2554 * We simply setup the wridlist backpointer to be the receive wqhdr
2555 * (rwq).
2556 *
2557 * But in the SRQ case, there is no backpointer to the wqhdr possible.
2558 * Instead we set 'wl_srq_en', specifying this wridlist is on an SRQ
2559 * and thus potentially shared across multiple QPs with the SRQ. We
2560 * also setup the srq_wridlist pointer to be the r_wridlist, and
2561 * intialize the freelist to an invalid index. This srq_wridlist
2562 * pointer is used above on future moves from_reset to let us know that
2563 * the srq_wridlist has been initialized already.
2564 *
2565 * And finally, if we are in a non-UMAP case, we setup the srq wrid
2566 * free list.
2567 */
2568 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED &&
2569 qp->qp_srqhdl->srq_wridlist == NULL) {
2570 r_wridlist->wl_srq_en = 1;
2571 r_wridlist->wl_free_list_indx = -1;
2572 qp->qp_srqhdl->srq_wridlist = r_wridlist;
2573
2574 /* Initialize srq wrid free list */
2575 if (qp->qp_srqhdl->srq_is_umap == 0) {
2576 mutex_enter(&rwq->wq_wrid_wql->wql_lock);
2577 tavor_wrid_list_srq_init(r_wridlist, qp->qp_srqhdl, 0);
2578 mutex_exit(&rwq->wq_wrid_wql->wql_lock);
2579 }
2580 } else {
2581 r_wridlist->wl_wqhdr = rwq;
2582 }
2583
2584 /* Chain the WRID list "container" to the workq hdr list */
2585 mutex_enter(&rwq->wq_wrid_wql->wql_lock);
2586 tavor_wrid_wqhdr_add(rwq, r_wridlist);
2587 mutex_exit(&rwq->wq_wrid_wql->wql_lock);
2588
2589 #ifdef __lock_lint
2590 mutex_exit(&qp->qp_srqhdl->srq_lock);
2591 #else
2592 if (qp_srq_en == TAVOR_QP_SRQ_ENABLED) {
2593 mutex_exit(&qp->qp_srqhdl->srq_lock);
2594 }
2595 #endif
2596
2597 _NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*r_wridlist))
2598 _NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*rwq))
2599 _NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*s_wridlist))
2600 _NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*swq))
2601
2602 tavor_wrid_wqhdr_unlock_both(qp);
2603 TAVOR_TNF_EXIT(tavor_wrid_from_reset_handling);
2604 return (DDI_SUCCESS);
2605 }
2606
2607
2608 /*
2609 * tavor_wrid_to_reset_handling()
2610 * Context: Can be called from interrupt or base context.
2611 */
2612 void
2613 tavor_wrid_to_reset_handling(tavor_state_t *state, tavor_qphdl_t qp)
2614 {
2615 uint_t free_wqhdr = 0;
2616
2617 TAVOR_TNF_ENTER(tavor_wrid_to_reset_handling);
2618
2619 /*
2620 * For each of this QP's Work Queues, move the WRID "container" to
2621 * the "reapable" list. Although there may still be unpolled
2622 * entries in these containers, it is not a big deal. We will not
2623 * reap the list until either the Poll CQ command detects an empty
2624 * condition or the CQ itself is freed. Grab the CQ lock(s) before
2625 * manipulating the lists.
2626 */
2627 mutex_enter(&qp->qp_rq_cqhdl->cq_lock);
2628 tavor_wrid_wqhdr_lock_both(qp);
2629 tavor_wrid_reaplist_add(qp->qp_sq_cqhdl, qp->qp_sq_wqhdr);
2630
2631 /*
2632 * Add the receive work queue header on to the reaplist. But if we are
2633 * on SRQ, then don't add anything to the reaplist. Instead we flush
2634 * the SRQ entries on the CQ, remove wridlist from WQHDR, and free the
2635 * WQHDR (if needed). We must hold the WQL for these operations, yet
2636 * the call to tavor_cq_wqhdr_remove grabs the WQL internally. So we
2637 * drop WQL before that call. Then release the CQ WQHDR locks and the
2638 * CQ lock and return.
2639 */
2640 if (qp->qp_srq_en == TAVOR_QP_SRQ_ENABLED) {
2641
2642 /*
2643 * Pull off all (if any) entries for this QP from CQ. This
2644 * only includes entries that have not yet been polled
2645 */
2646 mutex_enter(&qp->qp_rq_wqhdr->wq_wrid_wql->wql_lock);
2647 tavor_cq_srq_entries_flush(state, qp);
2648
2649 /* Remove wridlist from WQHDR */
2650 tavor_wrid_wqhdr_remove(qp->qp_rq_wqhdr,
2651 qp->qp_rq_wqhdr->wq_wrid_post);
2652
2653 /* If wridlist chain is now empty, remove the wqhdr as well */
2654 if (qp->qp_rq_wqhdr->wq_wrid_post == NULL) {
2655 free_wqhdr = 1;
2656 } else {
2657 free_wqhdr = 0;
2658 }
2659
2660 mutex_exit(&qp->qp_rq_wqhdr->wq_wrid_wql->wql_lock);
2661
2662 /* Free the WQHDR */
2663 if (free_wqhdr) {
2664 tavor_cq_wqhdr_remove(qp->qp_rq_cqhdl, qp->qp_rq_wqhdr);
2665 }
2666 } else {
2667 tavor_wrid_reaplist_add(qp->qp_rq_cqhdl, qp->qp_rq_wqhdr);
2668 }
2669 tavor_wrid_wqhdr_unlock_both(qp);
2670 mutex_exit(&qp->qp_rq_cqhdl->cq_lock);
2671
2672 TAVOR_TNF_EXIT(tavor_wrid_to_reset_handling);
2673 }
2674
2675
2676 /*
2677 * tavor_wrid_add_entry()
2678 * Context: Can be called from interrupt or base context.
2679 */
2680 void
2681 tavor_wrid_add_entry(tavor_workq_hdr_t *wq, uint64_t wrid, uint32_t wqeaddrsz,
2682 uint_t signaled_dbd)
2683 {
2684 tavor_wrid_entry_t *wre_tmp;
2685 uint32_t head, tail, size;
2686
2687 TAVOR_TNF_ENTER(tavor_wrid_add_entry);
2688
2689 ASSERT(MUTEX_HELD(&wq->wq_wrid_wql->wql_lock));
2690
2691 /*
2692 * Find the entry in the container pointed to by the "tail" index.
2693 * Add all of the relevant information to that entry, including WRID,
2694 * "wqeaddrsz" parameter, and whether it was signaled/unsignaled
2695 * and/or doorbelled.
2696 */
2697 head = wq->wq_wrid_post->wl_head;
2698 tail = wq->wq_wrid_post->wl_tail;
2699 size = wq->wq_wrid_post->wl_size;
2700 wre_tmp = &wq->wq_wrid_post->wl_wre[tail];
2701 wre_tmp->wr_wrid = wrid;
2702 wre_tmp->wr_wqeaddrsz = wqeaddrsz;
2703 wre_tmp->wr_signaled_dbd = signaled_dbd;
2704
2705 /*
2706 * Update the "wrid_old_tail" pointer to point to the entry we just
2707 * inserted into the queue. By tracking this pointer (the pointer to
2708 * the most recently inserted entry) it will possible later in the
2709 * PostSend() and PostRecv() code paths to find the entry that needs
2710 * its "doorbelled" flag set (see comment in tavor_post_recv() and/or
2711 * tavor_post_send()).
2712 */
2713 wq->wq_wrid_post->wl_wre_old_tail = wre_tmp;
2714
2715 /* Update the tail index */
2716 tail = ((tail + 1) & (size - 1));
2717 wq->wq_wrid_post->wl_tail = tail;
2718
2719 /*
2720 * If the "tail" index has just wrapped over into the "head" index,
2721 * then we have filled the container. We use the "full" flag to
2722 * indicate this condition and to distinguish it from the "empty"
2723 * condition (where head and tail are also equal).
2724 */
2725 if (head == tail) {
2726 wq->wq_wrid_post->wl_full = 1;
2727 }
2728 TAVOR_TNF_EXIT(tavor_wrid_add_entry);
2729 }
2730
2731 /*
2732 * tavor_wrid_add_entry_srq()
2733 * Context: Can be called from interrupt or base context
2734 */
2735 void
2736 tavor_wrid_add_entry_srq(tavor_srqhdl_t srq, uint64_t wrid, uint_t signaled_dbd)
2737 {
2738 tavor_wrid_entry_t *wre;
2739 uint64_t *wl_wqe;
2740 uint32_t wqe_index;
2741
2742 TAVOR_TNF_ENTER(tavor_wrid_add_entry_srq);
2743
2744 /*
2745 * Find the next available WQE from the SRQ free_list. Then update the
2746 * free_list to point to the next entry
2747 */
2748 wl_wqe = TAVOR_SRQ_WQE_ADDR(srq, srq->srq_wridlist->wl_free_list_indx);
2749
2750 wqe_index = srq->srq_wridlist->wl_free_list_indx;
2751
2752 /* ASSERT on impossible wqe_index values */
2753 ASSERT(wqe_index < srq->srq_wq_bufsz);
2754
2755 /*
2756 * Setup the WRE.
2757 *
2758 * Given the 'wqe_index' value, we store the WRID at this WRE offset.
2759 * And we set the WRE to be signaled_dbd so that on poll CQ we can find
2760 * this information and associate the WRID to the WQE found on the CQE.
2761 */
2762 wre = &srq->srq_wridlist->wl_wre[wqe_index];
2763 wre->wr_wrid = wrid;
2764 wre->wr_signaled_dbd = signaled_dbd;
2765
2766 /* Update the free list index */
2767 srq->srq_wridlist->wl_free_list_indx = ddi_get32(
2768 srq->srq_wridlist->wl_acchdl, (uint32_t *)wl_wqe);
2769
2770 TAVOR_TNF_EXIT(tavor_wrid_add_entry_srq);
2771 }
2772
2773
2774 /*
2775 * tavor_wrid_get_entry()
2776 * Context: Can be called from interrupt or base context.
2777 */
2778 uint64_t
2779 tavor_wrid_get_entry(tavor_cqhdl_t cq, tavor_hw_cqe_t *cqe,
2780 tavor_wrid_entry_t *wre)
2781 {
2782 tavor_workq_hdr_t *wq;
2783 tavor_wrid_entry_t *wre_tmp;
2784 uint64_t wrid;
2785 uint_t send_or_recv, qpnum, error, opcode;
2786
2787 TAVOR_TNF_ENTER(tavor_wrid_get_entry);
2788
2789 /* Lock the list of work queues associated with this CQ */
2790 mutex_enter(&cq->cq_wrid_wqhdr_lock);
2791
2792 /*
2793 * Determine whether this CQE is a send or receive completion (and
2794 * whether it was a "successful" completion or not)
2795 */
2796 opcode = TAVOR_CQE_OPCODE_GET(cq, cqe);
2797 if ((opcode == TAVOR_CQE_SEND_ERR_OPCODE) ||
2798 (opcode == TAVOR_CQE_RECV_ERR_OPCODE)) {
2799 error = 1;
2800 send_or_recv = (opcode == TAVOR_CQE_SEND_ERR_OPCODE) ?
2801 TAVOR_COMPLETION_SEND : TAVOR_COMPLETION_RECV;
2802 } else {
2803 error = 0;
2804 send_or_recv = TAVOR_CQE_SENDRECV_GET(cq, cqe);
2805 }
2806
2807 /* Find the work queue for this QP number (send or receive side) */
2808 qpnum = TAVOR_CQE_QPNUM_GET(cq, cqe);
2809 wq = tavor_wrid_wqhdr_find(cq, qpnum, send_or_recv);
2810 ASSERT(wq != NULL);
2811
2812 /*
2813 * Regardless of whether the completion is the result of a "success"
2814 * or a "failure", we lock the list of "containers" and attempt to
2815 * search for the the first matching completion (i.e. the first WR
2816 * with a matching WQE addr and size). Once we find it, we pull out
2817 * the "wrid" field and return it (see below). Note: One possible
2818 * future enhancement would be to enable this routine to skip over
2819 * any "unsignaled" completions to go directly to the next "signaled"
2820 * entry on success. XXX
2821 */
2822 mutex_enter(&wq->wq_wrid_wql->wql_lock);
2823 wre_tmp = tavor_wrid_find_match(wq, cq, cqe);
2824
2825 /*
2826 * If this is a "successful" completion, then we assert that this
2827 * completion must be a "signaled" completion.
2828 */
2829 ASSERT(error || (wre_tmp->wr_signaled_dbd & TAVOR_WRID_ENTRY_SIGNALED));
2830
2831 /*
2832 * If the completion is a "failed" completion, then we save away the
2833 * contents of the entry (into the "wre" field passed in) for use
2834 * in later CQE processing. Note: We use the tavor_wrid_get_wqeaddrsz()
2835 * function to grab "wqeaddrsz" from the next entry in the container.
2836 * This is required for error processing (where updating these fields
2837 * properly is necessary to correct handling of the "error" CQE)
2838 */
2839 if (error && (wre != NULL)) {
2840 *wre = *wre_tmp;
2841 wre->wr_wqeaddrsz = tavor_wrid_get_wqeaddrsz(wq);
2842 }
2843
2844 /* Pull out the WRID and return it */
2845 wrid = wre_tmp->wr_wrid;
2846
2847 mutex_exit(&wq->wq_wrid_wql->wql_lock);
2848 mutex_exit(&cq->cq_wrid_wqhdr_lock);
2849
2850 TAVOR_TNF_EXIT(tavor_wrid_get_entry);
2851 return (wrid);
2852 }
2853
2854
2855 /*
2856 * tavor_wrid_find_match()
2857 * Context: Can be called from interrupt or base context.
2858 */
2859 static tavor_wrid_entry_t *
2860 tavor_wrid_find_match(tavor_workq_hdr_t *wq, tavor_cqhdl_t cq,
2861 tavor_hw_cqe_t *cqe)
2862 {
2863 tavor_wrid_entry_t *curr = NULL;
2864 tavor_wrid_list_hdr_t *container;
2865 uint32_t wqeaddr_size;
2866 uint32_t head, tail, size;
2867 int found = 0, last_container;
2868
2869 TAVOR_TNF_ENTER(tavor_wrid_find_match);
2870
2871 ASSERT(MUTEX_HELD(&wq->wq_wrid_wql->wql_lock));
2872
2873 /* Pull the "wqeaddrsz" information from the CQE */
2874 wqeaddr_size = TAVOR_CQE_WQEADDRSZ_GET(cq, cqe);
2875
2876 /*
2877 * Walk the "containers" list(s), find first WR with a matching WQE
2878 * addr. If the current "container" is not the last one on the list,
2879 * i.e. not the current one to which we are posting new WRID entries,
2880 * then we do not attempt to update the "q_head", "q_tail", and
2881 * "q_full" indicators on the main work queue header. We do, however,
2882 * update the "head" and "full" indicators on the individual containers
2883 * as we go. This is imperative because we need to be able to
2884 * determine when the current container has been emptied (so that we
2885 * can move on to the next container).
2886 */
2887 container = wq->wq_wrid_poll;
2888 while (container != NULL) {
2889 /* Is this the last/only "container" on the list */
2890 last_container = (container != wq->wq_wrid_post) ? 0 : 1;
2891
2892 /*
2893 * First check if we are on an SRQ. If so, we grab the entry
2894 * and break out. Since SRQ wridlist's are never added to
2895 * reaplist, they can only be the last container.
2896 */
2897 if (container->wl_srq_en) {
2898 ASSERT(last_container == 1);
2899 curr = tavor_wrid_find_match_srq(container, cq, cqe);
2900 break;
2901 }
2902
2903 /*
2904 * Grab the current "head", "tail" and "size" fields before
2905 * walking the list in the current container. Note: the "size"
2906 * field here must always be a power-of-2. The "full"
2907 * parameter is checked (and updated) here to distinguish the
2908 * "queue full" condition from "queue empty".
2909 */
2910 head = container->wl_head;
2911 tail = container->wl_tail;
2912 size = container->wl_size;
2913 while ((head != tail) || (container->wl_full)) {
2914 container->wl_full = 0;
2915 curr = &container->wl_wre[head];
2916 head = ((head + 1) & (size - 1));
2917
2918 /*
2919 * If the current entry's "wqeaddrsz" matches the one
2920 * we're searching for, then this must correspond to
2921 * the work request that caused the completion. Set
2922 * the "found" flag and bail out.
2923 */
2924 if (curr->wr_wqeaddrsz == wqeaddr_size) {
2925 found = 1;
2926 break;
2927 }
2928 }
2929
2930 /*
2931 * If the current container is empty (having reached here the
2932 * "head == tail" condition can only mean that the container
2933 * is empty), then NULL out the "wrid_old_tail" field (see
2934 * tavor_post_send() and tavor_post_recv() for more details)
2935 * and (potentially) remove the current container from future
2936 * searches.
2937 */
2938 if (head == tail) {
2939
2940 container->wl_wre_old_tail = NULL;
2941 /*
2942 * If this wasn't the last "container" on the chain,
2943 * i.e. the one to which new WRID entries will be
2944 * added, then remove it from the list.
2945 * Note: we don't "lose" the memory pointed to by this
2946 * because we should have already put this container
2947 * on the "reapable" list (from where it will later be
2948 * pulled).
2949 */
2950 if (!last_container) {
2951 wq->wq_wrid_poll = container->wl_next;
2952 }
2953 }
2954
2955 /* Update the head index for the container */
2956 container->wl_head = head;
2957
2958 /*
2959 * If the entry was found in this container, then continue to
2960 * bail out. Else reset the "curr" pointer and move on to the
2961 * next container (if there is one). Note: the only real
2962 * reason for setting "curr = NULL" here is so that the ASSERT
2963 * below can catch the case where no matching entry was found
2964 * on any of the lists.
2965 */
2966 if (found) {
2967 break;
2968 } else {
2969 curr = NULL;
2970 container = container->wl_next;
2971 }
2972 }
2973
2974 /*
2975 * Update work queue header's "head" and "full" conditions to match
2976 * the last entry on the container list. (Note: Only if we're pulling
2977 * entries from the last work queue portion of the list, i.e. not from
2978 * the previous portions that may be the "reapable" list.)
2979 */
2980 if (last_container) {
2981 wq->wq_head = wq->wq_wrid_post->wl_head;
2982 wq->wq_full = wq->wq_wrid_post->wl_full;
2983 }
2984
2985 /* Ensure that we've actually found what we were searching for */
2986 ASSERT(curr != NULL);
2987
2988 TAVOR_TNF_EXIT(tavor_wrid_find_match);
2989 return (curr);
2990 }
2991
2992
2993 /*
2994 * tavor_wrid_find_match_srq()
2995 * Context: Can be called from interrupt or base context.
2996 */
2997 tavor_wrid_entry_t *
2998 tavor_wrid_find_match_srq(tavor_wrid_list_hdr_t *wl, tavor_cqhdl_t cq,
2999 tavor_hw_cqe_t *cqe)
3000 {
3001 tavor_wrid_entry_t *wre;
3002 uint64_t *wl_wqe;
3003 uint32_t wqe_index;
3004 uint64_t wqe_addr;
3005 uint32_t cqe_wqe_addr;
3006
3007 /* Grab the WQE addr out of the CQE */
3008 cqe_wqe_addr = TAVOR_CQE_WQEADDRSZ_GET(cq, cqe) & 0xFFFFFFC0;
3009
3010 /*
3011 * Use the WQE addr as the lower 32-bit, we add back on the
3012 * 'wl_srq_desc_off' because we have a zero-based queue. Then the
3013 * upper 32-bit of the 'wl_srq_wq_buf' OR'd on gives us the WQE addr in
3014 * the SRQ Work Queue itself. We use this address as the index to find
3015 * out which Work Queue Entry this CQE corresponds with.
3016 *
3017 * We also use this address below to add the WQE back on to the free
3018 * list.
3019 */
3020 wqe_addr = ((uintptr_t)wl->wl_srq_wq_buf & 0xFFFFFFFF00000000ull) |
3021 (cqe_wqe_addr + wl->wl_srq_desc_off);
3022
3023 /*
3024 * Given the 'wqe_addr' just calculated and the srq buf address, we
3025 * find the 'wqe_index'. The 'wre' returned below contains the WRID
3026 * that we are looking for. This indexes into the wre_list for this
3027 * specific WQE.
3028 */
3029 wqe_index = TAVOR_SRQ_WQE_INDEX(wl->wl_srq_wq_buf, wqe_addr,
3030 wl->wl_srq_log_wqesz);
3031
3032 /* ASSERT on impossible wqe_index values */
3033 ASSERT(wqe_index < wl->wl_srq_wq_bufsz);
3034
3035 /* Get the pointer to this WQE */
3036 wl_wqe = (uint64_t *)(uintptr_t)wqe_addr;
3037
3038 /* Put this WQE index back on the free list */
3039 ddi_put32(wl->wl_acchdl, (uint32_t *)wl_wqe, wl->wl_free_list_indx);
3040 wl->wl_free_list_indx = wqe_index;
3041
3042 /* Using the index, return the Work Request ID Entry (wre) */
3043 wre = &wl->wl_wre[wqe_index];
3044
3045 return (wre);
3046 }
3047
3048
3049 /*
3050 * tavor_wrid_cq_reap()
3051 * Context: Can be called from interrupt or base context.
3052 */
3053 void
3054 tavor_wrid_cq_reap(tavor_cqhdl_t cq)
3055 {
3056 tavor_workq_hdr_t *consume_wqhdr;
3057 tavor_wrid_list_hdr_t *container, *to_free;
3058
3059 ASSERT(MUTEX_HELD(&cq->cq_lock));
3060
3061 TAVOR_TNF_ENTER(tavor_wrid_cq_reap);
3062
3063 /* Lock the list of work queues associated with this CQ */
3064 mutex_enter(&cq->cq_wrid_wqhdr_lock);
3065
3066 /* Walk the "reapable" list and free up containers */
3067 container = cq->cq_wrid_reap_head;
3068 while (container != NULL) {
3069 to_free = container;
3070 container = container->wl_reap_next;
3071 /*
3072 * If reaping the WRID list containers pulls the last
3073 * container from the given work queue header, then we free
3074 * the work queue header as well.
3075 */
3076 consume_wqhdr = tavor_wrid_list_reap(to_free);
3077 if (consume_wqhdr != NULL) {
3078 tavor_cq_wqhdr_remove(cq, consume_wqhdr);
3079 }
3080 }
3081
3082 /* Once finished reaping, we reset the CQ's reap list */
3083 cq->cq_wrid_reap_head = cq->cq_wrid_reap_tail = NULL;
3084
3085 mutex_exit(&cq->cq_wrid_wqhdr_lock);
3086 TAVOR_TNF_EXIT(tavor_wrid_cq_reap);
3087 }
3088
3089
3090 /*
3091 * tavor_wrid_cq_force_reap()
3092 * Context: Can be called from interrupt or base context.
3093 */
3094 void
3095 tavor_wrid_cq_force_reap(tavor_cqhdl_t cq)
3096 {
3097 tavor_workq_hdr_t *curr;
3098 tavor_wrid_list_hdr_t *container, *to_free;
3099 avl_tree_t *treep;
3100 void *cookie = NULL;
3101
3102 ASSERT(MUTEX_HELD(&cq->cq_lock));
3103
3104 TAVOR_TNF_ENTER(tavor_wrid_cq_reap);
3105
3106 /*
3107 * The first step is to walk the "reapable" list and free up those
3108 * containers. This is necessary because the containers on the
3109 * reapable list are not otherwise connected to the work queue headers
3110 * anymore.
3111 */
3112 tavor_wrid_cq_reap(cq);
3113
3114 /* Now lock the list of work queues associated with this CQ */
3115 mutex_enter(&cq->cq_wrid_wqhdr_lock);
3116
3117 /*
3118 * Walk the list of work queue headers and free up all the WRID list
3119 * containers chained to it. Note: We don't need to grab the locks
3120 * for each of the individual WRID lists here because the only way
3121 * things can be added or removed from the list at this point would be
3122 * through post a work request to a QP. But if we've come this far,
3123 * then we can be assured that there are no longer any QP associated
3124 * with the CQ that we are trying to free.
3125 */
3126 #ifdef __lock_lint
3127 tavor_wrid_wqhdr_compare(NULL, NULL);
3128 #endif
3129 treep = &cq->cq_wrid_wqhdr_avl_tree;
3130 while ((curr = avl_destroy_nodes(treep, &cookie)) != NULL) {
3131 _NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*curr))
3132 container = curr->wq_wrid_poll;
3133 while (container != NULL) {
3134 to_free = container;
3135 container = container->wl_next;
3136 /*
3137 * If reaping the WRID list containers pulls the last
3138 * container from the given work queue header, then
3139 * we free the work queue header as well. Note: we
3140 * ignore the return value because we know that the
3141 * work queue header should always be freed once the
3142 * list of containers has come to an end.
3143 */
3144 (void) tavor_wrid_list_reap(to_free);
3145 if (container == NULL) {
3146 tavor_cq_wqhdr_remove(cq, curr);
3147 }
3148 }
3149 }
3150 avl_destroy(treep);
3151
3152 mutex_exit(&cq->cq_wrid_wqhdr_lock);
3153 TAVOR_TNF_EXIT(tavor_wrid_cq_reap);
3154 }
3155
3156
3157 /*
3158 * tavor_wrid_get_list()
3159 * Context: Can be called from interrupt or base context.
3160 */
3161 tavor_wrid_list_hdr_t *
3162 tavor_wrid_get_list(uint32_t qsize)
3163 {
3164 tavor_wrid_list_hdr_t *wridlist;
3165 uint32_t size;
3166
3167 /*
3168 * The WRID list "container" consists of the tavor_wrid_list_hdr_t,
3169 * which holds the pointers necessary for maintaining the "reapable"
3170 * list, chaining together multiple "containers" old and new, and
3171 * tracking the head, tail, size, etc. for each container.
3172 *
3173 * The "container" also holds all the tavor_wrid_entry_t's, which is
3174 * allocated separately, one for each entry on the corresponding work
3175 * queue.
3176 */
3177 size = sizeof (tavor_wrid_list_hdr_t);
3178
3179 /*
3180 * Note that this allocation has to be a NOSLEEP operation here
3181 * because we are holding the "wqhdr_list_lock" and, therefore,
3182 * could get raised to the interrupt level.
3183 */
3184 wridlist = (tavor_wrid_list_hdr_t *)kmem_zalloc(size, KM_NOSLEEP);
3185 if (wridlist == NULL) {
3186 return (NULL);
3187 }
3188 _NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*wridlist))
3189
3190 /* Complete the "container" initialization */
3191 wridlist->wl_size = qsize;
3192 wridlist->wl_full = 0;
3193 wridlist->wl_head = 0;
3194 wridlist->wl_tail = 0;
3195 wridlist->wl_wre = (tavor_wrid_entry_t *)kmem_zalloc(qsize *
3196 sizeof (tavor_wrid_entry_t), KM_NOSLEEP);
3197 if (wridlist->wl_wre == NULL) {
3198 kmem_free(wridlist, size);
3199 return (NULL);
3200 }
3201 wridlist->wl_wre_old_tail = NULL;
3202 wridlist->wl_reap_next = NULL;
3203 wridlist->wl_next = NULL;
3204 wridlist->wl_prev = NULL;
3205 wridlist->wl_srq_en = 0;
3206
3207 return (wridlist);
3208 }
3209
3210 /*
3211 * tavor_wrid_list_srq_init()
3212 * Context: Can be called from interrupt or base context
3213 */
3214 void
3215 tavor_wrid_list_srq_init(tavor_wrid_list_hdr_t *wridlist, tavor_srqhdl_t srq,
3216 uint_t wq_start)
3217 {
3218 uint64_t *wl_wqe;
3219 int wqe_index;
3220
3221 ASSERT(MUTEX_HELD(&srq->srq_wrid_wql->wql_lock));
3222
3223 /* Setup pointers for use later when we are polling the CQ */
3224 wridlist->wl_srq_wq_buf = srq->srq_wq_buf;
3225 wridlist->wl_srq_wq_bufsz = srq->srq_wq_bufsz;
3226 wridlist->wl_srq_log_wqesz = srq->srq_wq_log_wqesz;
3227 wridlist->wl_srq_desc_off = srq->srq_desc_off;
3228 wridlist->wl_acchdl = srq->srq_wqinfo.qa_acchdl;
3229
3230 /* Given wq_start to start initializing buf at, verify sanity */
3231 ASSERT(wq_start >= 0 && wq_start < srq->srq_wq_bufsz);
3232
3233 /*
3234 * Initialize wridlist free list
3235 *
3236 * For each WQ up to the size of our queue, we store an index in the WQ
3237 * memory itself, representing the next available free entry. The
3238 * 'wl_free_list_indx' always holds the index of the next available
3239 * free entry in the WQ. If 'wl_free_list_indx' is -1, then we are
3240 * completely full. This gives us the advantage of being able to have
3241 * entries complete or be polled off the WQ out-of-order.
3242 *
3243 * For now, we write the free_list entries inside the WQ itself. It
3244 * may be useful in the future to store this information in a separate
3245 * structure for debugging purposes.
3246 */
3247 for (wqe_index = wq_start; wqe_index < srq->srq_wq_bufsz; wqe_index++) {
3248 wl_wqe = TAVOR_SRQ_WQE_ADDR(srq, wqe_index);
3249 ddi_put32(wridlist->wl_acchdl, (uint32_t *)wl_wqe,
3250 wridlist->wl_free_list_indx);
3251 wridlist->wl_free_list_indx = wqe_index;
3252 }
3253 }
3254
3255
3256 /*
3257 * tavor_wrid_reaplist_add()
3258 * Context: Can be called from interrupt or base context.
3259 */
3260 static void
3261 tavor_wrid_reaplist_add(tavor_cqhdl_t cq, tavor_workq_hdr_t *wq)
3262 {
3263 ASSERT(MUTEX_HELD(&cq->cq_wrid_wqhdr_lock));
3264
3265 TAVOR_TNF_ENTER(tavor_wrid_reaplist_add);
3266
3267 mutex_enter(&wq->wq_wrid_wql->wql_lock);
3268
3269 /*
3270 * Add the "post" container (the last one on the current chain) to
3271 * the CQ's "reapable" list
3272 */
3273 if ((cq->cq_wrid_reap_head == NULL) &&
3274 (cq->cq_wrid_reap_tail == NULL)) {
3275 cq->cq_wrid_reap_head = wq->wq_wrid_post;
3276 cq->cq_wrid_reap_tail = wq->wq_wrid_post;
3277 } else {
3278 cq->cq_wrid_reap_tail->wl_reap_next = wq->wq_wrid_post;
3279 cq->cq_wrid_reap_tail = wq->wq_wrid_post;
3280 }
3281
3282 mutex_exit(&wq->wq_wrid_wql->wql_lock);
3283 }
3284
3285
3286 int
3287 tavor_wrid_wqhdr_compare(const void *p1, const void *p2)
3288 {
3289 tavor_workq_compare_t *cmpp;
3290 tavor_workq_hdr_t *curr;
3291
3292 cmpp = (tavor_workq_compare_t *)p1;
3293 curr = (tavor_workq_hdr_t *)p2;
3294
3295 if (cmpp->cmp_qpn < curr->wq_qpn)
3296 return (-1);
3297 else if (cmpp->cmp_qpn > curr->wq_qpn)
3298 return (+1);
3299 else if (cmpp->cmp_type < curr->wq_type)
3300 return (-1);
3301 else if (cmpp->cmp_type > curr->wq_type)
3302 return (+1);
3303 else
3304 return (0);
3305 }
3306
3307
3308 /*
3309 * tavor_wrid_wqhdr_find()
3310 * Context: Can be called from interrupt or base context.
3311 */
3312 static tavor_workq_hdr_t *
3313 tavor_wrid_wqhdr_find(tavor_cqhdl_t cq, uint_t qpn, uint_t wq_type)
3314 {
3315 tavor_workq_hdr_t *curr;
3316 tavor_workq_compare_t cmp;
3317
3318 TAVOR_TNF_ENTER(tavor_wrid_wqhdr_find);
3319
3320 ASSERT(MUTEX_HELD(&cq->cq_wrid_wqhdr_lock));
3321
3322 /*
3323 * Walk the CQ's work queue list, trying to find a send or recv queue
3324 * with the same QP number. We do this even if we are going to later
3325 * create a new entry because it helps us easily find the end of the
3326 * list.
3327 */
3328 cmp.cmp_qpn = qpn;
3329 cmp.cmp_type = wq_type;
3330 #ifdef __lock_lint
3331 tavor_wrid_wqhdr_compare(NULL, NULL);
3332 #endif
3333 curr = avl_find(&cq->cq_wrid_wqhdr_avl_tree, &cmp, NULL);
3334
3335 TAVOR_TNF_EXIT(tavor_wrid_wqhdr_find);
3336 return (curr);
3337 }
3338
3339
3340 /*
3341 * tavor_wrid_wqhdr_create()
3342 * Context: Can be called from interrupt or base context.
3343 */
3344 static tavor_workq_hdr_t *
3345 tavor_wrid_wqhdr_create(tavor_state_t *state, tavor_cqhdl_t cq, uint_t qpn,
3346 uint_t wq_type, uint_t create_wql)
3347 {
3348 tavor_workq_hdr_t *wqhdr_tmp;
3349
3350 TAVOR_TNF_ENTER(tavor_wrid_wqhdr_create);
3351
3352 ASSERT(MUTEX_HELD(&cq->cq_wrid_wqhdr_lock));
3353
3354 /*
3355 * Allocate space a work queue header structure and initialize it.
3356 * Each work queue header structure includes a "wq_wrid_wql"
3357 * which needs to be initialized. Note that this allocation has to be
3358 * a NOSLEEP operation because we are holding the "cq_wrid_wqhdr_lock"
3359 * and, therefore, could get raised to the interrupt level.
3360 */
3361 wqhdr_tmp = (tavor_workq_hdr_t *)kmem_zalloc(
3362 sizeof (tavor_workq_hdr_t), KM_NOSLEEP);
3363 if (wqhdr_tmp == NULL) {
3364 TAVOR_TNF_EXIT(tavor_wrid_wqhdr_create);
3365 return (NULL);
3366 }
3367 _NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*wqhdr_tmp))
3368 wqhdr_tmp->wq_qpn = qpn;
3369 wqhdr_tmp->wq_type = wq_type;
3370
3371 if (create_wql) {
3372 wqhdr_tmp->wq_wrid_wql = tavor_wrid_wql_create(state);
3373 if (wqhdr_tmp->wq_wrid_wql == NULL) {
3374 kmem_free(wqhdr_tmp, sizeof (tavor_workq_hdr_t));
3375 TAVOR_TNF_EXIT(tavor_wrid_wqhdr_create);
3376 return (NULL);
3377 }
3378 }
3379
3380 wqhdr_tmp->wq_wrid_poll = NULL;
3381 wqhdr_tmp->wq_wrid_post = NULL;
3382
3383 /* Chain the newly allocated work queue header to the CQ's list */
3384 tavor_cq_wqhdr_add(cq, wqhdr_tmp);
3385
3386 TAVOR_TNF_EXIT(tavor_wrid_wqhdr_create);
3387 return (wqhdr_tmp);
3388 }
3389
3390
3391 /*
3392 * tavor_wrid_wql_create()
3393 * Context: Can be called from interrupt or base context.
3394 */
3395 tavor_wq_lock_t *
3396 tavor_wrid_wql_create(tavor_state_t *state)
3397 {
3398 tavor_wq_lock_t *wql;
3399
3400 TAVOR_TNF_ENTER(tavor_wrid_wql_create);
3401
3402 /*
3403 * Allocate the WQL and initialize it.
3404 */
3405 wql = kmem_zalloc(sizeof (tavor_wq_lock_t), KM_NOSLEEP);
3406 if (wql == NULL) {
3407 TAVOR_TNF_EXIT(tavor_wrid_wqhdr_create);
3408 return (NULL);
3409 }
3410
3411 mutex_init(&wql->wql_lock, NULL, MUTEX_DRIVER,
3412 DDI_INTR_PRI(state->ts_intrmsi_pri));
3413
3414 /* Add refcount to WQL */
3415 tavor_wql_refcnt_inc(wql);
3416
3417 TAVOR_TNF_EXIT(tavor_wrid_wql_create);
3418 return (wql);
3419 }
3420
3421
3422 /*
3423 * tavor_wrid_get_wqeaddrsz()
3424 * Context: Can be called from interrupt or base context.
3425 */
3426 static uint32_t
3427 tavor_wrid_get_wqeaddrsz(tavor_workq_hdr_t *wq)
3428 {
3429 tavor_wrid_entry_t *wre;
3430 uint32_t wqeaddrsz;
3431 uint32_t head;
3432
3433 /*
3434 * If the container is empty, then there is no next entry. So just
3435 * return zero. Note: the "head == tail" condition here can only
3436 * mean that the container is empty because we have previously pulled
3437 * something from the container.
3438 *
3439 * If the container is not empty, then find the next entry and return
3440 * the contents of its "wqeaddrsz" field.
3441 */
3442 if (wq->wq_wrid_poll->wl_head == wq->wq_wrid_poll->wl_tail) {
3443 wqeaddrsz = 0;
3444 } else {
3445 /*
3446 * We don't need to calculate the "next" head pointer here
3447 * because "head" should already point to the next entry on
3448 * the list (since we just pulled something off - in
3449 * tavor_wrid_find_match() - and moved the head index forward.)
3450 */
3451 head = wq->wq_wrid_poll->wl_head;
3452 wre = &wq->wq_wrid_poll->wl_wre[head];
3453 wqeaddrsz = wre->wr_wqeaddrsz;
3454 }
3455 return (wqeaddrsz);
3456 }
3457
3458
3459 /*
3460 * tavor_wrid_wqhdr_add()
3461 * Context: Can be called from interrupt or base context.
3462 */
3463 static void
3464 tavor_wrid_wqhdr_add(tavor_workq_hdr_t *wqhdr,
3465 tavor_wrid_list_hdr_t *wridlist)
3466 {
3467 ASSERT(MUTEX_HELD(&wqhdr->wq_wrid_wql->wql_lock));
3468
3469 /* Chain the new WRID list "container" to the work queue list */
3470 if ((wqhdr->wq_wrid_post == NULL) &&
3471 (wqhdr->wq_wrid_poll == NULL)) {
3472 wqhdr->wq_wrid_poll = wridlist;
3473 wqhdr->wq_wrid_post = wridlist;
3474 } else {
3475 wqhdr->wq_wrid_post->wl_next = wridlist;
3476 wridlist->wl_prev = wqhdr->wq_wrid_post;
3477 wqhdr->wq_wrid_post = wridlist;
3478 }
3479 }
3480
3481
3482 /*
3483 * tavor_wrid_wqhdr_remove()
3484 * Context: Can be called from interrupt or base context.
3485 *
3486 * Note: this is only called to remove the most recently added WRID list
3487 * container (i.e. in tavor_from_reset() above)
3488 */
3489 static void
3490 tavor_wrid_wqhdr_remove(tavor_workq_hdr_t *wqhdr,
3491 tavor_wrid_list_hdr_t *wridlist)
3492 {
3493 tavor_wrid_list_hdr_t *prev, *next;
3494
3495 ASSERT(MUTEX_HELD(&wqhdr->wq_wrid_wql->wql_lock));
3496
3497 /* Unlink the WRID list "container" from the work queue list */
3498 prev = wridlist->wl_prev;
3499 next = wridlist->wl_next;
3500 if (prev != NULL) {
3501 prev->wl_next = next;
3502 }
3503 if (next != NULL) {
3504 next->wl_prev = prev;
3505 }
3506
3507 /*
3508 * Update any pointers in the work queue hdr that may point to this
3509 * WRID list container
3510 */
3511 if (wqhdr->wq_wrid_post == wridlist) {
3512 wqhdr->wq_wrid_post = prev;
3513 }
3514 if (wqhdr->wq_wrid_poll == wridlist) {
3515 wqhdr->wq_wrid_poll = NULL;
3516 }
3517 }
3518
3519
3520 /*
3521 * tavor_wrid_list_reap()
3522 * Context: Can be called from interrupt or base context.
3523 * Note: The "wqhdr_list_lock" must be held.
3524 */
3525 static tavor_workq_hdr_t *
3526 tavor_wrid_list_reap(tavor_wrid_list_hdr_t *wridlist)
3527 {
3528 tavor_workq_hdr_t *wqhdr, *consume_wqhdr = NULL;
3529 tavor_wrid_list_hdr_t *prev, *next;
3530 uint32_t size;
3531
3532 TAVOR_TNF_ENTER(tavor_wrid_list_reap);
3533
3534 /* Get the back pointer to the work queue header (see below) */
3535 wqhdr = wridlist->wl_wqhdr;
3536 mutex_enter(&wqhdr->wq_wrid_wql->wql_lock);
3537
3538 /* Unlink the WRID list "container" from the work queue list */
3539 prev = wridlist->wl_prev;
3540 next = wridlist->wl_next;
3541 if (prev != NULL) {
3542 prev->wl_next = next;
3543 }
3544 if (next != NULL) {
3545 next->wl_prev = prev;
3546 }
3547
3548 /*
3549 * If the back pointer to the work queue header shows that it
3550 * was pointing to the entry we are about to remove, then the work
3551 * queue header is reapable as well.
3552 */
3553 if ((wqhdr->wq_wrid_poll == wridlist) &&
3554 (wqhdr->wq_wrid_post == wridlist)) {
3555 consume_wqhdr = wqhdr;
3556 }
3557
3558 /* Be sure to update the "poll" and "post" container pointers */
3559 if (wqhdr->wq_wrid_poll == wridlist) {
3560 wqhdr->wq_wrid_poll = next;
3561 }
3562 if (wqhdr->wq_wrid_post == wridlist) {
3563 wqhdr->wq_wrid_post = NULL;
3564 }
3565
3566 /* Calculate the size and free the container */
3567 size = (wridlist->wl_size * sizeof (tavor_wrid_entry_t));
3568 kmem_free(wridlist->wl_wre, size);
3569 kmem_free(wridlist, sizeof (tavor_wrid_list_hdr_t));
3570
3571 mutex_exit(&wqhdr->wq_wrid_wql->wql_lock);
3572
3573 TAVOR_TNF_EXIT(tavor_wrid_list_reap);
3574 return (consume_wqhdr);
3575 }
3576
3577
3578 /*
3579 * tavor_wrid_wqhdr_lock_both()
3580 * Context: Can be called from interrupt or base context.
3581 */
3582 static void
3583 tavor_wrid_wqhdr_lock_both(tavor_qphdl_t qp)
3584 {
3585 tavor_cqhdl_t sq_cq, rq_cq;
3586
3587 sq_cq = qp->qp_sq_cqhdl;
3588 rq_cq = qp->qp_rq_cqhdl;
3589
3590 _NOTE(MUTEX_ACQUIRED_AS_SIDE_EFFECT(&sq_cq->cq_wrid_wqhdr_lock))
3591 _NOTE(MUTEX_ACQUIRED_AS_SIDE_EFFECT(&rq_cq->cq_wrid_wqhdr_lock))
3592
3593 /*
3594 * If both work queues (send and recv) share a completion queue, then
3595 * grab the common lock. If they use different CQs (hence different
3596 * "cq_wrid_wqhdr_list" locks), then grab the send one first, then the
3597 * receive. We do this consistently and correctly in
3598 * tavor_wrid_wqhdr_unlock_both() below to avoid introducing any kind
3599 * of dead lock condition. Note: We add the "__lock_lint" code here
3600 * to fake out warlock into thinking we've grabbed both locks (when,
3601 * in fact, we only needed the one).
3602 */
3603 if (sq_cq == rq_cq) {
3604 mutex_enter(&sq_cq->cq_wrid_wqhdr_lock);
3605 #ifdef __lock_lint
3606 mutex_enter(&rq_cq->cq_wrid_wqhdr_lock);
3607 #endif
3608 } else {
3609 mutex_enter(&sq_cq->cq_wrid_wqhdr_lock);
3610 mutex_enter(&rq_cq->cq_wrid_wqhdr_lock);
3611 }
3612 }
3613
3614 /*
3615 * tavor_wrid_wqhdr_unlock_both()
3616 * Context: Can be called from interrupt or base context.
3617 */
3618 static void
3619 tavor_wrid_wqhdr_unlock_both(tavor_qphdl_t qp)
3620 {
3621 tavor_cqhdl_t sq_cq, rq_cq;
3622
3623 sq_cq = qp->qp_sq_cqhdl;
3624 rq_cq = qp->qp_rq_cqhdl;
3625
3626 _NOTE(LOCK_RELEASED_AS_SIDE_EFFECT(&rq_cq->cq_wrid_wqhdr_lock))
3627 _NOTE(LOCK_RELEASED_AS_SIDE_EFFECT(&sq_cq->cq_wrid_wqhdr_lock))
3628
3629 /*
3630 * See tavor_wrid_wqhdr_lock_both() above for more detail
3631 */
3632 if (sq_cq == rq_cq) {
3633 #ifdef __lock_lint
3634 mutex_exit(&rq_cq->cq_wrid_wqhdr_lock);
3635 #endif
3636 mutex_exit(&sq_cq->cq_wrid_wqhdr_lock);
3637 } else {
3638 mutex_exit(&rq_cq->cq_wrid_wqhdr_lock);
3639 mutex_exit(&sq_cq->cq_wrid_wqhdr_lock);
3640 }
3641 }
3642
3643
3644 /*
3645 * tavor_cq_wqhdr_add()
3646 * Context: Can be called from interrupt or base context.
3647 */
3648 static void
3649 tavor_cq_wqhdr_add(tavor_cqhdl_t cq, tavor_workq_hdr_t *wqhdr)
3650 {
3651 tavor_workq_compare_t cmp;
3652 avl_index_t where;
3653
3654 ASSERT(MUTEX_HELD(&cq->cq_wrid_wqhdr_lock));
3655
3656 cmp.cmp_qpn = wqhdr->wq_qpn;
3657 cmp.cmp_type = wqhdr->wq_type;
3658 #ifdef __lock_lint
3659 tavor_wrid_wqhdr_compare(NULL, NULL);
3660 #endif
3661 (void) avl_find(&cq->cq_wrid_wqhdr_avl_tree, &cmp, &where);
3662 /*
3663 * If the CQ's work queue list is empty, then just add it.
3664 * Otherwise, chain it to the beginning of the list.
3665 */
3666 avl_insert(&cq->cq_wrid_wqhdr_avl_tree, wqhdr, where);
3667 }
3668
3669
3670 /*
3671 * tavor_cq_wqhdr_remove()
3672 * Context: Can be called from interrupt or base context.
3673 */
3674 static void
3675 tavor_cq_wqhdr_remove(tavor_cqhdl_t cq, tavor_workq_hdr_t *wqhdr)
3676 {
3677 ASSERT(MUTEX_HELD(&cq->cq_wrid_wqhdr_lock));
3678
3679 #ifdef __lock_lint
3680 tavor_wrid_wqhdr_compare(NULL, NULL);
3681 #endif
3682 /* Remove "wqhdr" from the work queue header list on "cq" */
3683 avl_remove(&cq->cq_wrid_wqhdr_avl_tree, wqhdr);
3684
3685 /*
3686 * Release reference to WQL; If this is the last reference, this call
3687 * also has the side effect of freeing up the 'wq_wrid_wql' memory.
3688 */
3689 tavor_wql_refcnt_dec(wqhdr->wq_wrid_wql);
3690
3691 /* Free the memory associated with "wqhdr" */
3692 kmem_free(wqhdr, sizeof (tavor_workq_hdr_t));
3693 }
3694
3695
3696 /*
3697 * tavor_wql_refcnt_inc()
3698 * Context: Can be called from interrupt or base context
3699 */
3700 void
3701 tavor_wql_refcnt_inc(tavor_wq_lock_t *wql)
3702 {
3703 ASSERT(wql != NULL);
3704
3705 mutex_enter(&wql->wql_lock);
3706 wql->wql_refcnt++;
3707 mutex_exit(&wql->wql_lock);
3708 }
3709
3710 /*
3711 * tavor_wql_refcnt_dec()
3712 * Context: Can be called from interrupt or base context
3713 */
3714 void
3715 tavor_wql_refcnt_dec(tavor_wq_lock_t *wql)
3716 {
3717 int refcnt;
3718
3719 ASSERT(wql != NULL);
3720
3721 mutex_enter(&wql->wql_lock);
3722 wql->wql_refcnt--;
3723 refcnt = wql->wql_refcnt;
3724 mutex_exit(&wql->wql_lock);
3725
3726 /*
3727 *
3728 * Free up WQL memory if we're the last one associated with this
3729 * structure.
3730 */
3731 if (refcnt == 0) {
3732 mutex_destroy(&wql->wql_lock);
3733 kmem_free(wql, sizeof (tavor_wq_lock_t));
3734 }
3735 }