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 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/scsi/scsi.h>
28 #include <sys/vtrace.h>
29
30
31 #define A_TO_TRAN(ap) ((ap)->a_hba_tran)
32 #define P_TO_TRAN(pkt) ((pkt)->pkt_address.a_hba_tran)
33 #define P_TO_ADDR(pkt) (&((pkt)->pkt_address))
34
35 /*
36 * Callback id
37 */
38 uintptr_t scsi_callback_id = 0;
39
40 extern ddi_dma_attr_t scsi_alloc_attr;
41
42 struct buf *
43 scsi_alloc_consistent_buf(struct scsi_address *ap,
44 struct buf *in_bp, size_t datalen, uint_t bflags,
45 int (*callback)(caddr_t), caddr_t callback_arg)
46 {
47 dev_info_t *pdip;
48 struct buf *bp;
49 int kmflag;
50 size_t rlen;
51
52 TRACE_0(TR_FAC_SCSI_RES, TR_SCSI_ALLOC_CONSISTENT_BUF_START,
53 "scsi_alloc_consistent_buf_start");
54
55 if (!in_bp) {
56 kmflag = (callback == SLEEP_FUNC) ? KM_SLEEP : KM_NOSLEEP;
57 if ((bp = getrbuf(kmflag)) == NULL) {
58 goto no_resource;
59 }
60 } else {
61 bp = in_bp;
62
63 /* we are establishing a new buffer memory association */
64 bp->b_flags &= ~(B_PAGEIO | B_PHYS | B_REMAPPED | B_SHADOW);
65 bp->b_proc = NULL;
66 bp->b_pages = NULL;
67 bp->b_shadow = NULL;
68 }
69
70 /* limit bits that can be set by bflags argument */
71 ASSERT(!(bflags & ~(B_READ | B_WRITE)));
72 bflags &= (B_READ | B_WRITE);
73 bp->b_un.b_addr = 0;
74
75 if (datalen) {
76 pdip = (A_TO_TRAN(ap))->tran_hba_dip;
77
78 /*
79 * use i_ddi_mem_alloc() for now until we have an interface to
80 * allocate memory for DMA which doesn't require a DMA handle.
81 */
82 while (i_ddi_mem_alloc(pdip, &scsi_alloc_attr, datalen,
83 ((callback == SLEEP_FUNC) ? 1 : 0), 0, NULL,
84 &bp->b_un.b_addr, &rlen, NULL) != DDI_SUCCESS) {
85 if (callback == SLEEP_FUNC) {
86 delay(drv_usectohz(10000));
87 } else {
88 if (!in_bp)
89 freerbuf(bp);
90 goto no_resource;
91 }
92 }
93 bp->b_flags |= bflags;
94 }
95 bp->b_bcount = datalen;
96 bp->b_resid = 0;
97
98 TRACE_0(TR_FAC_SCSI_RES, TR_SCSI_ALLOC_CONSISTENT_BUF_END,
99 "scsi_alloc_consistent_buf_end");
100 return (bp);
101
102 no_resource:
103
104 if (callback != NULL_FUNC && callback != SLEEP_FUNC) {
105 ddi_set_callback(callback, callback_arg,
106 &scsi_callback_id);
107 }
108 TRACE_0(TR_FAC_SCSI_RES,
109 TR_SCSI_ALLOC_CONSISTENT_BUF_RETURN1_END,
110 "scsi_alloc_consistent_buf_end (return1)");
111 return (NULL);
112 }
113
114 void
115 scsi_free_consistent_buf(struct buf *bp)
116 {
117 TRACE_0(TR_FAC_SCSI_RES, TR_SCSI_FREE_CONSISTENT_BUF_START,
118 "scsi_free_consistent_buf_start");
119 if (!bp)
120 return;
121 if (bp->b_un.b_addr)
122 i_ddi_mem_free((caddr_t)bp->b_un.b_addr, NULL);
123 freerbuf(bp);
124 if (scsi_callback_id != 0) {
125 ddi_run_callback(&scsi_callback_id);
126 }
127 TRACE_0(TR_FAC_SCSI_RES, TR_SCSI_FREE_CONSISTENT_BUF_END,
128 "scsi_free_consistent_buf_end");
129 }
130
131 void
132 scsi_dmafree_attr(struct scsi_pkt *pktp)
133 {
134 struct scsi_pkt_cache_wrapper *pktw =
135 (struct scsi_pkt_cache_wrapper *)pktp;
136
137 if (pktw->pcw_flags & PCW_BOUND) {
138 if (ddi_dma_unbind_handle(pktp->pkt_handle) !=
139 DDI_SUCCESS)
140 cmn_err(CE_WARN, "scsi_dmafree_attr: "
141 "unbind handle failed");
142 pktw->pcw_flags &= ~PCW_BOUND;
143 }
144 pktp->pkt_numcookies = 0;
145 pktw->pcw_totalwin = 0;
146 }
147
148 struct buf *
149 scsi_pkt2bp(struct scsi_pkt *pkt)
150 {
151 return (((struct scsi_pkt_cache_wrapper *)pkt)->pcw_bp);
152 }
153
154 int
155 scsi_dma_buf_bind_attr(struct scsi_pkt_cache_wrapper *pktw,
156 struct buf *bp,
157 int dma_flags,
158 int (*callback)(),
159 caddr_t arg)
160 {
161 struct scsi_pkt *pktp = &(pktw->pcw_pkt);
162 int status;
163
164 /*
165 * First time, need to establish the handle.
166 */
167
168 ASSERT(pktp->pkt_numcookies == 0);
169 ASSERT(pktw->pcw_totalwin == 0);
170
171 status = ddi_dma_buf_bind_handle(pktp->pkt_handle, bp, dma_flags,
172 callback, arg, &pktw->pcw_cookie,
173 &pktp->pkt_numcookies);
174
175 switch (status) {
176 case DDI_DMA_MAPPED:
177 pktw->pcw_totalwin = 1;
178 break;
179
180 case DDI_DMA_PARTIAL_MAP:
181 /* enable first call to ddi_dma_getwin */
182 if (ddi_dma_numwin(pktp->pkt_handle,
183 &pktw->pcw_totalwin) != DDI_SUCCESS) {
184 bp->b_error = 0;
185 return (0);
186 }
187 break;
188
189 case DDI_DMA_NORESOURCES:
190 bp->b_error = 0;
191 return (0);
192
193 case DDI_DMA_TOOBIG:
194 bioerror(bp, EINVAL);
195 return (0);
196
197 case DDI_DMA_NOMAPPING:
198 case DDI_DMA_INUSE:
199 default:
200 bioerror(bp, EFAULT);
201 return (0);
202 }
203
204 /* initialize the loop controls for scsi_dmaget_attr() */
205 pktw->pcw_curwin = 0;
206 pktw->pcw_total_xfer = 0;
207 pktp->pkt_dma_flags = dma_flags;
208 return (1);
209 }
210
211 #if defined(_DMA_USES_PHYSADDR)
212 int
213 scsi_dmaget_attr(struct scsi_pkt_cache_wrapper *pktw)
214 {
215 struct scsi_pkt *pktp = &(pktw->pcw_pkt);
216
217 int status;
218 int num_segs = 0;
219 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)pktp->pkt_handle;
220 ddi_dma_cookie_t *cp;
221
222 if (pktw->pcw_curwin != 0) {
223 ddi_dma_cookie_t cookie;
224
225 /*
226 * start the next window, and get its first cookie
227 */
228 status = ddi_dma_getwin(pktp->pkt_handle,
229 pktw->pcw_curwin, &pktp->pkt_dma_offset,
230 &pktp->pkt_dma_len, &cookie,
231 &pktp->pkt_numcookies);
232 if (status != DDI_SUCCESS)
233 return (0);
234 }
235
236 /*
237 * start the Scatter/Gather loop
238 */
239 cp = hp->dmai_cookie - 1;
240 pktp->pkt_dma_len = 0;
241 for (;;) {
242
243 /* take care of the loop-bookkeeping */
244 pktp->pkt_dma_len += cp->dmac_size;
245 num_segs++;
246 /*
247 * if this was the last cookie in the current window
248 * set the loop controls start the next window and
249 * exit so the HBA can do this partial transfer
250 */
251 if (num_segs >= pktp->pkt_numcookies) {
252 pktw->pcw_curwin++;
253 break;
254 }
255
256 cp++;
257 }
258 pktw->pcw_total_xfer += pktp->pkt_dma_len;
259 pktp->pkt_cookies = hp->dmai_cookie - 1;
260 hp->dmai_cookie = cp;
261
262 return (1);
263 }
264 #endif
265
266 void scsi_free_cache_pkt(struct scsi_address *, struct scsi_pkt *);
267
268 struct scsi_pkt *
269 scsi_init_cache_pkt(struct scsi_address *ap, struct scsi_pkt *in_pktp,
270 struct buf *bp, int cmdlen, int statuslen, int pplen,
271 int flags, int (*callback)(caddr_t), caddr_t callback_arg)
272 {
273 struct scsi_pkt_cache_wrapper *pktw;
274 scsi_hba_tran_t *tranp = ap->a_hba_tran;
275 int (*func)(caddr_t);
276
277 func = (callback == SLEEP_FUNC) ? SLEEP_FUNC : NULL_FUNC;
278
279 if (in_pktp == NULL) {
280 int kf;
281
282 if (callback == SLEEP_FUNC)
283 kf = KM_SLEEP;
284 else
285 kf = KM_NOSLEEP;
286 /*
287 * By using kmem_cache_alloc(), the layout of the
288 * scsi_pkt, scsi_pkt_cache_wrapper, hba private data,
289 * cdb, tgt driver private data, and status block is
290 * as below.
291 *
292 * This is a piece of contiguous memory starting from
293 * the first structure field scsi_pkt in the struct
294 * scsi_pkt_cache_wrapper, followed by the hba private
295 * data, pkt_cdbp, the tgt driver private data and
296 * pkt_scbp.
297 *
298 * |----------------------------|--------------------->
299 * | struct scsi_pkt | struct
300 * | ...... |scsi_pkt_cache_wrapper
301 * | pcw_flags |
302 * |----------------------------|<---------------------
303 * | hba private data |tranp->tran_hba_len
304 * |----------------------------|
305 * | pkt_cdbp |DEFAULT_CDBLEN
306 * |----------------------------|
307 * | tgt private data |DEFAULT_PRIVLEN
308 * |----------------------------|
309 * | pkt_scbp |DEFAULT_SCBLEN
310 * |----------------------------|
311 *
312 * If the actual data length of the cdb, or the tgt
313 * driver private data, or the status block is bigger
314 * than the default data length, kmem_alloc() will be
315 * called to get extra space.
316 */
317 pktw = kmem_cache_alloc(tranp->tran_pkt_cache_ptr,
318 kf);
319 if (pktw == NULL)
320 goto fail1;
321
322 pktw->pcw_flags = 0;
323 in_pktp = &(pktw->pcw_pkt);
324 in_pktp->pkt_address = *ap;
325
326 /*
327 * target drivers should initialize pkt_comp and
328 * pkt_time, but sometimes they don't so initialize
329 * them here to be safe.
330 */
331 in_pktp->pkt_flags = 0;
332 in_pktp->pkt_time = 0;
333 in_pktp->pkt_resid = 0;
334 in_pktp->pkt_state = 0;
335 in_pktp->pkt_statistics = 0;
336 in_pktp->pkt_reason = 0;
337 in_pktp->pkt_dma_offset = 0;
338 in_pktp->pkt_dma_len = 0;
339 in_pktp->pkt_dma_flags = 0;
340 in_pktp->pkt_path_instance = 0;
341 ASSERT(in_pktp->pkt_numcookies == 0);
342 pktw->pcw_curwin = 0;
343 pktw->pcw_totalwin = 0;
344 pktw->pcw_total_xfer = 0;
345
346 in_pktp->pkt_cdblen = cmdlen;
347 if ((tranp->tran_hba_flags & SCSI_HBA_TRAN_CDB) &&
348 (cmdlen > DEFAULT_CDBLEN)) {
349 pktw->pcw_flags |= PCW_NEED_EXT_CDB;
350 in_pktp->pkt_cdbp = kmem_alloc(cmdlen, kf);
351 if (in_pktp->pkt_cdbp == NULL)
352 goto fail2;
353 }
354 in_pktp->pkt_tgtlen = pplen;
355 if (pplen > DEFAULT_PRIVLEN) {
356 pktw->pcw_flags |= PCW_NEED_EXT_TGT;
357 in_pktp->pkt_private = kmem_alloc(pplen, kf);
358 if (in_pktp->pkt_private == NULL)
359 goto fail3;
360 }
361 in_pktp->pkt_scblen = statuslen;
362 if ((tranp->tran_hba_flags & SCSI_HBA_TRAN_SCB) &&
363 (statuslen > DEFAULT_SCBLEN)) {
364 pktw->pcw_flags |= PCW_NEED_EXT_SCB;
365 in_pktp->pkt_scbp = kmem_alloc(statuslen, kf);
366 if (in_pktp->pkt_scbp == NULL)
367 goto fail4;
368 }
369 if ((*tranp->tran_setup_pkt) (in_pktp,
370 func, NULL) == -1) {
371 goto fail5;
372 }
373 if (cmdlen)
374 bzero((void *)in_pktp->pkt_cdbp, cmdlen);
375 if (pplen)
376 bzero((void *)in_pktp->pkt_private, pplen);
377 if (statuslen)
378 bzero((void *)in_pktp->pkt_scbp, statuslen);
379 } else
380 pktw = (struct scsi_pkt_cache_wrapper *)in_pktp;
381
382 if (bp && bp->b_bcount) {
383
384 int dma_flags = 0;
385
386 /*
387 * we need to transfer data, so we alloc dma resources
388 * for this packet
389 */
390 /*CONSTCOND*/
391 ASSERT(SLEEP_FUNC == DDI_DMA_SLEEP);
392 /*CONSTCOND*/
393 ASSERT(NULL_FUNC == DDI_DMA_DONTWAIT);
394
395 #if defined(_DMA_USES_PHYSADDR)
396 /*
397 * with an IOMMU we map everything, so we don't
398 * need to bother with this
399 */
400 if (tranp->tran_dma_attr.dma_attr_granular !=
401 pktw->pcw_granular) {
402
403 ddi_dma_free_handle(&in_pktp->pkt_handle);
404 if (ddi_dma_alloc_handle(tranp->tran_hba_dip,
405 &tranp->tran_dma_attr,
406 func, NULL,
407 &in_pktp->pkt_handle) != DDI_SUCCESS) {
408
409 in_pktp->pkt_handle = NULL;
410 return (NULL);
411 }
412 pktw->pcw_granular =
413 tranp->tran_dma_attr.dma_attr_granular;
414 }
415 #endif
416
417 if (in_pktp->pkt_numcookies == 0) {
418 pktw->pcw_bp = bp;
419 /*
420 * set dma flags; the "read" case must be first
421 * since B_WRITE isn't always be set for writes.
422 */
423 if (bp->b_flags & B_READ) {
424 dma_flags |= DDI_DMA_READ;
425 } else {
426 dma_flags |= DDI_DMA_WRITE;
427 }
428 if (flags & PKT_CONSISTENT)
429 dma_flags |= DDI_DMA_CONSISTENT;
430 if (flags & PKT_DMA_PARTIAL)
431 dma_flags |= DDI_DMA_PARTIAL;
432
433 #if defined(__sparc)
434 /*
435 * workaround for byte hole issue on psycho and
436 * schizo pre 2.1
437 */
438 if ((bp->b_flags & B_READ) && ((bp->b_flags &
439 (B_PAGEIO|B_REMAPPED)) != B_PAGEIO) &&
440 (((uintptr_t)bp->b_un.b_addr & 0x7) ||
441 ((uintptr_t)bp->b_bcount & 0x7))) {
442 dma_flags |= DDI_DMA_CONSISTENT;
443 }
444 #endif
445 if (!scsi_dma_buf_bind_attr(pktw, bp,
446 dma_flags, callback, callback_arg)) {
447 return (NULL);
448 } else {
449 pktw->pcw_flags |= PCW_BOUND;
450 }
451 }
452
453 #if defined(_DMA_USES_PHYSADDR)
454 if (!scsi_dmaget_attr(pktw)) {
455 scsi_dmafree_attr(in_pktp);
456 goto fail5;
457 }
458 #else
459 in_pktp->pkt_cookies = &pktw->pcw_cookie;
460 in_pktp->pkt_dma_len = pktw->pcw_cookie.dmac_size;
461 pktw->pcw_total_xfer += in_pktp->pkt_dma_len;
462 #endif
463 ASSERT(in_pktp->pkt_numcookies <=
464 tranp->tran_dma_attr.dma_attr_sgllen);
465 ASSERT(pktw->pcw_total_xfer <= bp->b_bcount);
466 in_pktp->pkt_resid = bp->b_bcount -
467 pktw->pcw_total_xfer;
468
469 ASSERT((in_pktp->pkt_resid % pktw->pcw_granular) ==
470 0);
471 } else {
472 /* !bp or no b_bcount */
473 in_pktp->pkt_resid = 0;
474 }
475 return (in_pktp);
476
477 fail5:
478 if (pktw->pcw_flags & PCW_NEED_EXT_SCB) {
479 kmem_free(in_pktp->pkt_scbp, statuslen);
480 in_pktp->pkt_scbp = (opaque_t)((char *)in_pktp +
481 tranp->tran_hba_len + DEFAULT_PRIVLEN +
482 sizeof (struct scsi_pkt_cache_wrapper));
483 if ((A_TO_TRAN(ap))->tran_hba_flags & SCSI_HBA_TRAN_CDB)
484 in_pktp->pkt_scbp = (opaque_t)((in_pktp->pkt_scbp) +
485 DEFAULT_CDBLEN);
486 in_pktp->pkt_scblen = 0;
487 }
488 fail4:
489 if (pktw->pcw_flags & PCW_NEED_EXT_TGT) {
490 kmem_free(in_pktp->pkt_private, pplen);
491 in_pktp->pkt_tgtlen = 0;
492 in_pktp->pkt_private = NULL;
493 }
494 fail3:
495 if (pktw->pcw_flags & PCW_NEED_EXT_CDB) {
496 kmem_free(in_pktp->pkt_cdbp, cmdlen);
497 in_pktp->pkt_cdbp = (opaque_t)((char *)in_pktp +
498 tranp->tran_hba_len +
499 sizeof (struct scsi_pkt_cache_wrapper));
500 in_pktp->pkt_cdblen = 0;
501 }
502 pktw->pcw_flags &=
503 ~(PCW_NEED_EXT_CDB|PCW_NEED_EXT_TGT|PCW_NEED_EXT_SCB);
504 fail2:
505 kmem_cache_free(tranp->tran_pkt_cache_ptr, pktw);
506 fail1:
507 if (callback != NULL_FUNC && callback != SLEEP_FUNC) {
508 ddi_set_callback(callback, callback_arg,
509 &scsi_callback_id);
510 }
511
512 return (NULL);
513 }
514
515 void
516 scsi_free_cache_pkt(struct scsi_address *ap, struct scsi_pkt *pktp)
517 {
518 struct scsi_pkt_cache_wrapper *pktw;
519
520 (*A_TO_TRAN(ap)->tran_teardown_pkt)(pktp);
521 pktw = (struct scsi_pkt_cache_wrapper *)pktp;
522 if (pktw->pcw_flags & PCW_BOUND)
523 scsi_dmafree_attr(pktp);
524
525 /*
526 * if we allocated memory for anything that wouldn't fit, free
527 * the memory and restore the pointers
528 */
529 if (pktw->pcw_flags & PCW_NEED_EXT_SCB) {
530 kmem_free(pktp->pkt_scbp, pktp->pkt_scblen);
531 pktp->pkt_scbp = (opaque_t)((char *)pktp +
532 (A_TO_TRAN(ap))->tran_hba_len +
533 DEFAULT_PRIVLEN + sizeof (struct scsi_pkt_cache_wrapper));
534 if ((A_TO_TRAN(ap))->tran_hba_flags & SCSI_HBA_TRAN_CDB)
535 pktp->pkt_scbp = (opaque_t)((pktp->pkt_scbp) +
536 DEFAULT_CDBLEN);
537 pktp->pkt_scblen = 0;
538 }
539 if (pktw->pcw_flags & PCW_NEED_EXT_TGT) {
540 kmem_free(pktp->pkt_private, pktp->pkt_tgtlen);
541 pktp->pkt_tgtlen = 0;
542 pktp->pkt_private = NULL;
543 }
544 if (pktw->pcw_flags & PCW_NEED_EXT_CDB) {
545 kmem_free(pktp->pkt_cdbp, pktp->pkt_cdblen);
546 pktp->pkt_cdbp = (opaque_t)((char *)pktp +
547 (A_TO_TRAN(ap))->tran_hba_len +
548 sizeof (struct scsi_pkt_cache_wrapper));
549 pktp->pkt_cdblen = 0;
550 }
551 pktw->pcw_flags &=
552 ~(PCW_NEED_EXT_CDB|PCW_NEED_EXT_TGT|PCW_NEED_EXT_SCB);
553 kmem_cache_free(A_TO_TRAN(ap)->tran_pkt_cache_ptr, pktw);
554
555 if (scsi_callback_id != 0) {
556 ddi_run_callback(&scsi_callback_id);
557 }
558
559 }
560
561
562 struct scsi_pkt *
563 scsi_init_pkt(struct scsi_address *ap, struct scsi_pkt *in_pktp,
564 struct buf *bp, int cmdlen, int statuslen, int pplen,
565 int flags, int (*callback)(caddr_t), caddr_t callback_arg)
566 {
567 struct scsi_pkt *pktp;
568 scsi_hba_tran_t *tranp = ap->a_hba_tran;
569 int (*func)(caddr_t);
570
571 TRACE_5(TR_FAC_SCSI_RES, TR_SCSI_INIT_PKT_START,
572 "scsi_init_pkt_start: addr %p in_pktp %p cmdlen %d statuslen %d pplen %d",
573 ap, in_pktp, cmdlen, statuslen, pplen);
574
575 #if defined(__i386) || defined(__amd64)
576 if (flags & PKT_CONSISTENT_OLD) {
577 flags &= ~PKT_CONSISTENT_OLD;
578 flags |= PKT_CONSISTENT;
579 }
580 #endif
581
582 func = (callback == SLEEP_FUNC) ? SLEEP_FUNC : NULL_FUNC;
583
584 pktp = (*tranp->tran_init_pkt) (ap, in_pktp, bp, cmdlen,
585 statuslen, pplen, flags, func, NULL);
586 if (pktp == NULL) {
587 if (callback != NULL_FUNC && callback != SLEEP_FUNC) {
588 ddi_set_callback(callback, callback_arg,
589 &scsi_callback_id);
590 }
591 }
592
593 TRACE_1(TR_FAC_SCSI_RES, TR_SCSI_INIT_PKT_END,
594 "scsi_init_pkt_end: pktp %p", pktp);
595 return (pktp);
596 }
597
598 void
599 scsi_destroy_pkt(struct scsi_pkt *pkt)
600 {
601 struct scsi_address *ap = P_TO_ADDR(pkt);
602
603 TRACE_1(TR_FAC_SCSI_RES, TR_SCSI_DESTROY_PKT_START,
604 "scsi_destroy_pkt_start: pkt %p", pkt);
605
606 (*A_TO_TRAN(ap)->tran_destroy_pkt)(ap, pkt);
607
608 if (scsi_callback_id != 0) {
609 ddi_run_callback(&scsi_callback_id);
610 }
611
612 TRACE_0(TR_FAC_SCSI_RES, TR_SCSI_DESTROY_PKT_END,
613 "scsi_destroy_pkt_end");
614 }
615
616
617 /*
618 * Generic Resource Allocation Routines
619 */
620
621 struct scsi_pkt *
622 scsi_resalloc(struct scsi_address *ap, int cmdlen, int statuslen,
623 opaque_t dmatoken, int (*callback)())
624 {
625 register struct scsi_pkt *pkt;
626 register scsi_hba_tran_t *tranp = ap->a_hba_tran;
627 register int (*func)(caddr_t);
628
629 func = (callback == SLEEP_FUNC) ? SLEEP_FUNC : NULL_FUNC;
630
631 pkt = (*tranp->tran_init_pkt) (ap, NULL, (struct buf *)dmatoken,
632 cmdlen, statuslen, 0, 0, func, NULL);
633 if (pkt == NULL) {
634 if (callback != NULL_FUNC && callback != SLEEP_FUNC) {
635 ddi_set_callback(callback, NULL, &scsi_callback_id);
636 }
637 }
638
639 return (pkt);
640 }
641
642 struct scsi_pkt *
643 scsi_pktalloc(struct scsi_address *ap, int cmdlen, int statuslen,
644 int (*callback)())
645 {
646 struct scsi_pkt *pkt;
647 struct scsi_hba_tran *tran = ap->a_hba_tran;
648 register int (*func)(caddr_t);
649
650 func = (callback == SLEEP_FUNC) ? SLEEP_FUNC : NULL_FUNC;
651
652 pkt = (*tran->tran_init_pkt) (ap, NULL, NULL, cmdlen,
653 statuslen, 0, 0, func, NULL);
654 if (pkt == NULL) {
655 if (callback != NULL_FUNC && callback != SLEEP_FUNC) {
656 ddi_set_callback(callback, NULL, &scsi_callback_id);
657 }
658 }
659
660 return (pkt);
661 }
662
663 struct scsi_pkt *
664 scsi_dmaget(struct scsi_pkt *pkt, opaque_t dmatoken, int (*callback)())
665 {
666 struct scsi_pkt *new_pkt;
667 register int (*func)(caddr_t);
668
669 func = (callback == SLEEP_FUNC) ? SLEEP_FUNC : NULL_FUNC;
670
671 new_pkt = (*P_TO_TRAN(pkt)->tran_init_pkt) (&pkt->pkt_address,
672 pkt, (struct buf *)dmatoken,
673 0, 0, 0, 0, func, NULL);
674 ASSERT(new_pkt == pkt || new_pkt == NULL);
675 if (new_pkt == NULL) {
676 if (callback != NULL_FUNC && callback != SLEEP_FUNC) {
677 ddi_set_callback(callback, NULL, &scsi_callback_id);
678 }
679 }
680
681 return (new_pkt);
682 }
683
684
685 /*
686 * Generic Resource Deallocation Routines
687 */
688
689 void
690 scsi_dmafree(struct scsi_pkt *pkt)
691 {
692 register struct scsi_address *ap = P_TO_ADDR(pkt);
693
694 (*A_TO_TRAN(ap)->tran_dmafree)(ap, pkt);
695
696 if (scsi_callback_id != 0) {
697 ddi_run_callback(&scsi_callback_id);
698 }
699 }
700
701 /*ARGSUSED*/
702 void
703 scsi_cache_dmafree(struct scsi_address *ap, struct scsi_pkt *pkt)
704 {
705 ASSERT(pkt->pkt_numcookies == 0 ||
706 ((struct scsi_pkt_cache_wrapper *)pkt)->pcw_flags & PCW_BOUND);
707 ASSERT(pkt->pkt_handle != NULL);
708 scsi_dmafree_attr(pkt);
709
710 if (scsi_callback_id != 0) {
711 ddi_run_callback(&scsi_callback_id);
712 }
713 }
714
715 void
716 scsi_sync_pkt(struct scsi_pkt *pkt)
717 {
718 register struct scsi_address *ap = P_TO_ADDR(pkt);
719
720 if (pkt->pkt_state & STATE_XFERRED_DATA)
721 (*A_TO_TRAN(ap)->tran_sync_pkt)(ap, pkt);
722 }
723
724 /*ARGSUSED*/
725 void
726 scsi_sync_cache_pkt(struct scsi_address *ap, struct scsi_pkt *pkt)
727 {
728 if (pkt->pkt_handle &&
729 (pkt->pkt_dma_flags & (DDI_DMA_WRITE | DDI_DMA_READ))) {
730 (void) ddi_dma_sync(pkt->pkt_handle,
731 pkt->pkt_dma_offset, pkt->pkt_dma_len,
732 (pkt->pkt_dma_flags & DDI_DMA_WRITE) ?
733 DDI_DMA_SYNC_FORDEV : DDI_DMA_SYNC_FORCPU);
734 }
735 }
736
737 void
738 scsi_resfree(struct scsi_pkt *pkt)
739 {
740 register struct scsi_address *ap = P_TO_ADDR(pkt);
741 (*A_TO_TRAN(ap)->tran_destroy_pkt)(ap, pkt);
742
743 if (scsi_callback_id != 0) {
744 ddi_run_callback(&scsi_callback_id);
745 }
746 }