1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 EMC Corp.
5 * All rights reserved.
6 *
7 * Copyright (c) 1997, 1998 Justin T. Gibbs.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #include "opt_bus.h"
34 #include "opt_iommu.h"
35
36 #include <sys/param.h>
37 #include <sys/conf.h>
38 #include <sys/systm.h>
39 #include <sys/bio.h>
40 #include <sys/bus.h>
41 #include <sys/callout.h>
42 #include <sys/ktr.h>
43 #include <sys/mbuf.h>
44 #include <sys/memdesc.h>
45 #include <sys/proc.h>
46 #include <sys/uio.h>
47
48 #include <vm/vm.h>
49 #include <vm/vm_page.h>
50 #include <vm/vm_map.h>
51 #include <vm/pmap.h>
52
53 #include <cam/cam.h>
54 #include <cam/cam_ccb.h>
55
56 #include <opencrypto/cryptodev.h>
57
58 #include <machine/bus.h>
59
60 /*
61 * Load up data starting at offset within a region specified by a
62 * list of virtual address ranges until either length or the region
63 * are exhausted.
64 */
65 static int
_bus_dmamap_load_vlist(bus_dma_tag_t dmat,bus_dmamap_t map,bus_dma_segment_t * list,int sglist_cnt,struct pmap * pmap,int * nsegs,int flags,size_t offset,size_t length)66 _bus_dmamap_load_vlist(bus_dma_tag_t dmat, bus_dmamap_t map,
67 bus_dma_segment_t *list, int sglist_cnt, struct pmap *pmap, int *nsegs,
68 int flags, size_t offset, size_t length)
69 {
70 int error;
71
72 error = 0;
73 for (; sglist_cnt > 0 && length != 0; sglist_cnt--, list++) {
74 char *addr;
75 size_t ds_len;
76
77 KASSERT((offset < list->ds_len),
78 ("Invalid mid-segment offset"));
79 addr = (char *)(uintptr_t)list->ds_addr + offset;
80 ds_len = list->ds_len - offset;
81 offset = 0;
82 if (ds_len > length)
83 ds_len = length;
84 length -= ds_len;
85 KASSERT((ds_len != 0), ("Segment length is zero"));
86 error = _bus_dmamap_load_buffer(dmat, map, addr, ds_len, pmap,
87 flags, NULL, nsegs);
88 if (error)
89 break;
90 }
91 return (error);
92 }
93
94 /*
95 * Load a list of physical addresses.
96 */
97 static int
_bus_dmamap_load_plist(bus_dma_tag_t dmat,bus_dmamap_t map,bus_dma_segment_t * list,int sglist_cnt,int * nsegs,int flags)98 _bus_dmamap_load_plist(bus_dma_tag_t dmat, bus_dmamap_t map,
99 bus_dma_segment_t *list, int sglist_cnt, int *nsegs, int flags)
100 {
101 int error;
102
103 error = 0;
104 for (; sglist_cnt > 0; sglist_cnt--, list++) {
105 error = _bus_dmamap_load_phys(dmat, map,
106 (vm_paddr_t)list->ds_addr, list->ds_len, flags, NULL,
107 nsegs);
108 if (error)
109 break;
110 }
111 return (error);
112 }
113
114 /*
115 * Load an unmapped mbuf
116 */
117 static int
_bus_dmamap_load_mbuf_epg(bus_dma_tag_t dmat,bus_dmamap_t map,struct mbuf * m,bus_dma_segment_t * segs,int * nsegs,int flags)118 _bus_dmamap_load_mbuf_epg(bus_dma_tag_t dmat, bus_dmamap_t map,
119 struct mbuf *m, bus_dma_segment_t *segs, int *nsegs, int flags)
120 {
121 int error, i, off, len, pglen, pgoff, seglen, segoff;
122
123 M_ASSERTEXTPG(m);
124
125 len = m->m_len;
126 error = 0;
127
128 /* Skip over any data removed from the front. */
129 off = mtod(m, vm_offset_t);
130
131 if (m->m_epg_hdrlen != 0) {
132 if (off >= m->m_epg_hdrlen) {
133 off -= m->m_epg_hdrlen;
134 } else {
135 seglen = m->m_epg_hdrlen - off;
136 segoff = off;
137 seglen = min(seglen, len);
138 off = 0;
139 len -= seglen;
140 error = _bus_dmamap_load_buffer(dmat, map,
141 &m->m_epg_hdr[segoff], seglen, kernel_pmap,
142 flags, segs, nsegs);
143 }
144 }
145 pgoff = m->m_epg_1st_off;
146 for (i = 0; i < m->m_epg_npgs && error == 0 && len > 0; i++) {
147 pglen = m_epg_pagelen(m, i, pgoff);
148 if (off >= pglen) {
149 off -= pglen;
150 pgoff = 0;
151 continue;
152 }
153 seglen = pglen - off;
154 segoff = pgoff + off;
155 off = 0;
156 seglen = min(seglen, len);
157 len -= seglen;
158 error = _bus_dmamap_load_phys(dmat, map,
159 m->m_epg_pa[i] + segoff, seglen, flags, segs, nsegs);
160 pgoff = 0;
161 };
162 if (len != 0 && error == 0) {
163 KASSERT((off + len) <= m->m_epg_trllen,
164 ("off + len > trail (%d + %d > %d)", off, len,
165 m->m_epg_trllen));
166 error = _bus_dmamap_load_buffer(dmat, map,
167 &m->m_epg_trail[off], len, kernel_pmap, flags, segs,
168 nsegs);
169 }
170 return (error);
171 }
172
173 /*
174 * Load a single mbuf.
175 */
176 static int
_bus_dmamap_load_single_mbuf(bus_dma_tag_t dmat,bus_dmamap_t map,struct mbuf * m,bus_dma_segment_t * segs,int * nsegs,int flags)177 _bus_dmamap_load_single_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map,
178 struct mbuf *m, bus_dma_segment_t *segs, int *nsegs, int flags)
179 {
180 int error;
181
182 error = 0;
183 if ((m->m_flags & M_EXTPG) != 0)
184 error = _bus_dmamap_load_mbuf_epg(dmat, map, m, segs, nsegs,
185 flags);
186 else
187 error = _bus_dmamap_load_buffer(dmat, map, m->m_data, m->m_len,
188 kernel_pmap, flags | BUS_DMA_LOAD_MBUF, segs, nsegs);
189 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
190 __func__, dmat, flags, error, *nsegs);
191 return (error);
192 }
193
194 /*
195 * Load an mbuf chain.
196 */
197 static int
_bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat,bus_dmamap_t map,struct mbuf * m0,bus_dma_segment_t * segs,int * nsegs,int flags)198 _bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map,
199 struct mbuf *m0, bus_dma_segment_t *segs, int *nsegs, int flags)
200 {
201 struct mbuf *m;
202 int error;
203
204 error = 0;
205 for (m = m0; m != NULL && error == 0; m = m->m_next) {
206 if (m->m_len > 0) {
207 if ((m->m_flags & M_EXTPG) != 0)
208 error = _bus_dmamap_load_mbuf_epg(dmat,
209 map, m, segs, nsegs, flags);
210 else
211 error = _bus_dmamap_load_buffer(dmat, map,
212 m->m_data, m->m_len, kernel_pmap,
213 flags | BUS_DMA_LOAD_MBUF, segs, nsegs);
214 }
215 }
216 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
217 __func__, dmat, flags, error, *nsegs);
218 return (error);
219 }
220
221 /*
222 * Load from block io.
223 */
224 static int
_bus_dmamap_load_bio(bus_dma_tag_t dmat,bus_dmamap_t map,struct bio * bio,int * nsegs,int flags)225 _bus_dmamap_load_bio(bus_dma_tag_t dmat, bus_dmamap_t map, struct bio *bio,
226 int *nsegs, int flags)
227 {
228
229 if ((bio->bio_flags & BIO_VLIST) != 0) {
230 bus_dma_segment_t *segs = (bus_dma_segment_t *)bio->bio_data;
231 return (_bus_dmamap_load_vlist(dmat, map, segs, bio->bio_ma_n,
232 kernel_pmap, nsegs, flags, bio->bio_ma_offset,
233 bio->bio_bcount));
234 }
235
236 if ((bio->bio_flags & BIO_UNMAPPED) != 0)
237 return (_bus_dmamap_load_ma(dmat, map, bio->bio_ma,
238 bio->bio_bcount, bio->bio_ma_offset, flags, NULL, nsegs));
239
240 return (_bus_dmamap_load_buffer(dmat, map, bio->bio_data,
241 bio->bio_bcount, kernel_pmap, flags, NULL, nsegs));
242 }
243
244 int
bus_dmamap_load_ma_triv(bus_dma_tag_t dmat,bus_dmamap_t map,struct vm_page ** ma,bus_size_t tlen,int ma_offs,int flags,bus_dma_segment_t * segs,int * segp)245 bus_dmamap_load_ma_triv(bus_dma_tag_t dmat, bus_dmamap_t map,
246 struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
247 bus_dma_segment_t *segs, int *segp)
248 {
249 vm_paddr_t paddr;
250 bus_size_t len;
251 int error, i;
252
253 error = 0;
254 for (i = 0; tlen > 0; i++, tlen -= len) {
255 len = min(PAGE_SIZE - ma_offs, tlen);
256 paddr = VM_PAGE_TO_PHYS(ma[i]) + ma_offs;
257 error = _bus_dmamap_load_phys(dmat, map, paddr, len,
258 flags, segs, segp);
259 if (error != 0)
260 break;
261 ma_offs = 0;
262 }
263 return (error);
264 }
265
266 /*
267 * Load a cam control block.
268 */
269 static int
_bus_dmamap_load_ccb(bus_dma_tag_t dmat,bus_dmamap_t map,union ccb * ccb,int * nsegs,int flags)270 _bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
271 int *nsegs, int flags)
272 {
273 struct ccb_hdr *ccb_h;
274 void *data_ptr;
275 int error;
276 uint32_t dxfer_len;
277 uint16_t sglist_cnt;
278
279 error = 0;
280 ccb_h = &ccb->ccb_h;
281 switch (ccb_h->func_code) {
282 case XPT_SCSI_IO: {
283 struct ccb_scsiio *csio;
284
285 csio = &ccb->csio;
286 data_ptr = csio->data_ptr;
287 dxfer_len = csio->dxfer_len;
288 sglist_cnt = csio->sglist_cnt;
289 break;
290 }
291 case XPT_CONT_TARGET_IO: {
292 struct ccb_scsiio *ctio;
293
294 ctio = &ccb->ctio;
295 data_ptr = ctio->data_ptr;
296 dxfer_len = ctio->dxfer_len;
297 sglist_cnt = ctio->sglist_cnt;
298 break;
299 }
300 case XPT_ATA_IO: {
301 struct ccb_ataio *ataio;
302
303 ataio = &ccb->ataio;
304 data_ptr = ataio->data_ptr;
305 dxfer_len = ataio->dxfer_len;
306 sglist_cnt = 0;
307 break;
308 }
309 case XPT_NVME_IO:
310 case XPT_NVME_ADMIN: {
311 struct ccb_nvmeio *nvmeio;
312
313 nvmeio = &ccb->nvmeio;
314 data_ptr = nvmeio->data_ptr;
315 dxfer_len = nvmeio->dxfer_len;
316 sglist_cnt = nvmeio->sglist_cnt;
317 break;
318 }
319 default:
320 panic("_bus_dmamap_load_ccb: Unsupported func code %d",
321 ccb_h->func_code);
322 }
323
324 switch ((ccb_h->flags & CAM_DATA_MASK)) {
325 case CAM_DATA_VADDR:
326 error = _bus_dmamap_load_buffer(dmat, map, data_ptr, dxfer_len,
327 kernel_pmap, flags, NULL, nsegs);
328 break;
329 case CAM_DATA_PADDR:
330 error = _bus_dmamap_load_phys(dmat, map,
331 (vm_paddr_t)(uintptr_t)data_ptr, dxfer_len, flags, NULL,
332 nsegs);
333 break;
334 case CAM_DATA_SG:
335 error = _bus_dmamap_load_vlist(dmat, map,
336 (bus_dma_segment_t *)data_ptr, sglist_cnt, kernel_pmap,
337 nsegs, flags, 0, dxfer_len);
338 break;
339 case CAM_DATA_SG_PADDR:
340 error = _bus_dmamap_load_plist(dmat, map,
341 (bus_dma_segment_t *)data_ptr, sglist_cnt, nsegs, flags);
342 break;
343 case CAM_DATA_BIO:
344 error = _bus_dmamap_load_bio(dmat, map, (struct bio *)data_ptr,
345 nsegs, flags);
346 break;
347 default:
348 panic("_bus_dmamap_load_ccb: flags 0x%X unimplemented",
349 ccb_h->flags);
350 }
351 return (error);
352 }
353
354 /*
355 * Load a uio.
356 */
357 static int
_bus_dmamap_load_uio(bus_dma_tag_t dmat,bus_dmamap_t map,struct uio * uio,int * nsegs,int flags)358 _bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, struct uio *uio,
359 int *nsegs, int flags)
360 {
361 bus_size_t resid;
362 bus_size_t minlen;
363 struct iovec *iov;
364 pmap_t pmap;
365 caddr_t addr;
366 int error, i;
367
368 if (uio->uio_segflg == UIO_USERSPACE) {
369 KASSERT(uio->uio_td != NULL,
370 ("bus_dmamap_load_uio: USERSPACE but no proc"));
371 pmap = vmspace_pmap(uio->uio_td->td_proc->p_vmspace);
372 } else
373 pmap = kernel_pmap;
374 resid = uio->uio_resid;
375 iov = uio->uio_iov;
376 error = 0;
377
378 for (i = 0; i < uio->uio_iovcnt && resid != 0 && !error; i++) {
379 /*
380 * Now at the first iovec to load. Load each iovec
381 * until we have exhausted the residual count.
382 */
383
384 addr = (caddr_t) iov[i].iov_base;
385 minlen = resid < iov[i].iov_len ? resid : iov[i].iov_len;
386 if (minlen > 0) {
387 error = _bus_dmamap_load_buffer(dmat, map, addr,
388 minlen, pmap, flags, NULL, nsegs);
389 resid -= minlen;
390 }
391 }
392
393 return (error);
394 }
395
396 /*
397 * Map the buffer buf into bus space using the dmamap map.
398 */
399 int
bus_dmamap_load(bus_dma_tag_t dmat,bus_dmamap_t map,void * buf,bus_size_t buflen,bus_dmamap_callback_t * callback,void * callback_arg,int flags)400 bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
401 bus_size_t buflen, bus_dmamap_callback_t *callback,
402 void *callback_arg, int flags)
403 {
404 bus_dma_segment_t *segs;
405 struct memdesc mem;
406 int error;
407 int nsegs;
408
409 if ((flags & BUS_DMA_NOWAIT) == 0) {
410 mem = memdesc_vaddr(buf, buflen);
411 _bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
412 }
413
414 nsegs = -1;
415 error = _bus_dmamap_load_buffer(dmat, map, buf, buflen, kernel_pmap,
416 flags, NULL, &nsegs);
417 nsegs++;
418
419 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
420 __func__, dmat, flags, error, nsegs);
421
422 if (error == EINPROGRESS)
423 return (error);
424
425 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
426 if (error)
427 (*callback)(callback_arg, segs, 0, error);
428 else
429 (*callback)(callback_arg, segs, nsegs, 0);
430
431 /*
432 * Return ENOMEM to the caller so that it can pass it up the stack.
433 * This error only happens when NOWAIT is set, so deferral is disabled.
434 */
435 if (error == ENOMEM)
436 return (error);
437
438 return (0);
439 }
440
441 int
bus_dmamap_load_mbuf(bus_dma_tag_t dmat,bus_dmamap_t map,struct mbuf * m0,bus_dmamap_callback2_t * callback,void * callback_arg,int flags)442 bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
443 bus_dmamap_callback2_t *callback, void *callback_arg, int flags)
444 {
445 bus_dma_segment_t *segs;
446 int nsegs, error;
447
448 M_ASSERTPKTHDR(m0);
449
450 flags |= BUS_DMA_NOWAIT;
451 nsegs = -1;
452 error = _bus_dmamap_load_mbuf_sg(dmat, map, m0, NULL, &nsegs, flags);
453 ++nsegs;
454
455 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
456 if (error)
457 (*callback)(callback_arg, segs, 0, 0, error);
458 else
459 (*callback)(callback_arg, segs, nsegs, m0->m_pkthdr.len, error);
460
461 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
462 __func__, dmat, flags, error, nsegs);
463 return (error);
464 }
465
466 int
bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat,bus_dmamap_t map,struct mbuf * m0,bus_dma_segment_t * segs,int * nsegs,int flags)467 bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
468 bus_dma_segment_t *segs, int *nsegs, int flags)
469 {
470 int error;
471
472 flags |= BUS_DMA_NOWAIT;
473 *nsegs = -1;
474 error = _bus_dmamap_load_mbuf_sg(dmat, map, m0, segs, nsegs, flags);
475 ++*nsegs;
476 _bus_dmamap_complete(dmat, map, segs, *nsegs, error);
477 return (error);
478 }
479
480 int
bus_dmamap_load_uio(bus_dma_tag_t dmat,bus_dmamap_t map,struct uio * uio,bus_dmamap_callback2_t * callback,void * callback_arg,int flags)481 bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, struct uio *uio,
482 bus_dmamap_callback2_t *callback, void *callback_arg, int flags)
483 {
484 bus_dma_segment_t *segs;
485 int nsegs, error;
486
487 flags |= BUS_DMA_NOWAIT;
488 nsegs = -1;
489 error = _bus_dmamap_load_uio(dmat, map, uio, &nsegs, flags);
490 nsegs++;
491
492 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
493 if (error)
494 (*callback)(callback_arg, segs, 0, 0, error);
495 else
496 (*callback)(callback_arg, segs, nsegs, uio->uio_resid, error);
497
498 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
499 __func__, dmat, flags, error, nsegs);
500 return (error);
501 }
502
503 int
bus_dmamap_load_ccb(bus_dma_tag_t dmat,bus_dmamap_t map,union ccb * ccb,bus_dmamap_callback_t * callback,void * callback_arg,int flags)504 bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
505 bus_dmamap_callback_t *callback, void *callback_arg,
506 int flags)
507 {
508 bus_dma_segment_t *segs;
509 struct ccb_hdr *ccb_h;
510 struct memdesc mem;
511 int error;
512 int nsegs;
513
514 ccb_h = &ccb->ccb_h;
515 if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_NONE) {
516 callback(callback_arg, NULL, 0, 0);
517 return (0);
518 }
519 if ((flags & BUS_DMA_NOWAIT) == 0) {
520 mem = memdesc_ccb(ccb);
521 _bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
522 }
523 nsegs = -1;
524 error = _bus_dmamap_load_ccb(dmat, map, ccb, &nsegs, flags);
525 nsegs++;
526
527 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
528 __func__, dmat, flags, error, nsegs);
529
530 if (error == EINPROGRESS)
531 return (error);
532
533 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
534 if (error)
535 (*callback)(callback_arg, segs, 0, error);
536 else
537 (*callback)(callback_arg, segs, nsegs, error);
538 /*
539 * Return ENOMEM to the caller so that it can pass it up the stack.
540 * This error only happens when NOWAIT is set, so deferral is disabled.
541 */
542 if (error == ENOMEM)
543 return (error);
544
545 return (0);
546 }
547
548 int
bus_dmamap_load_bio(bus_dma_tag_t dmat,bus_dmamap_t map,struct bio * bio,bus_dmamap_callback_t * callback,void * callback_arg,int flags)549 bus_dmamap_load_bio(bus_dma_tag_t dmat, bus_dmamap_t map, struct bio *bio,
550 bus_dmamap_callback_t *callback, void *callback_arg,
551 int flags)
552 {
553 bus_dma_segment_t *segs;
554 struct memdesc mem;
555 int error;
556 int nsegs;
557
558 if ((flags & BUS_DMA_NOWAIT) == 0) {
559 mem = memdesc_bio(bio);
560 _bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
561 }
562 nsegs = -1;
563 error = _bus_dmamap_load_bio(dmat, map, bio, &nsegs, flags);
564 nsegs++;
565
566 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
567 __func__, dmat, flags, error, nsegs);
568
569 if (error == EINPROGRESS)
570 return (error);
571
572 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
573 if (error)
574 (*callback)(callback_arg, segs, 0, error);
575 else
576 (*callback)(callback_arg, segs, nsegs, error);
577 /*
578 * Return ENOMEM to the caller so that it can pass it up the stack.
579 * This error only happens when NOWAIT is set, so deferral is disabled.
580 */
581 if (error == ENOMEM)
582 return (error);
583
584 return (0);
585 }
586
587 int
bus_dmamap_load_mem(bus_dma_tag_t dmat,bus_dmamap_t map,struct memdesc * mem,bus_dmamap_callback_t * callback,void * callback_arg,int flags)588 bus_dmamap_load_mem(bus_dma_tag_t dmat, bus_dmamap_t map,
589 struct memdesc *mem, bus_dmamap_callback_t *callback,
590 void *callback_arg, int flags)
591 {
592 bus_dma_segment_t *segs;
593 int error;
594 int nsegs;
595
596 if ((flags & BUS_DMA_NOWAIT) == 0)
597 _bus_dmamap_waitok(dmat, map, mem, callback, callback_arg);
598
599 nsegs = -1;
600 error = 0;
601 switch (mem->md_type) {
602 case MEMDESC_VADDR:
603 error = _bus_dmamap_load_buffer(dmat, map, mem->u.md_vaddr,
604 mem->md_opaque, kernel_pmap, flags, NULL, &nsegs);
605 break;
606 case MEMDESC_PADDR:
607 error = _bus_dmamap_load_phys(dmat, map, mem->u.md_paddr,
608 mem->md_opaque, flags, NULL, &nsegs);
609 break;
610 case MEMDESC_VLIST:
611 error = _bus_dmamap_load_vlist(dmat, map, mem->u.md_list,
612 mem->md_opaque, kernel_pmap, &nsegs, flags, 0, SIZE_T_MAX);
613 break;
614 case MEMDESC_PLIST:
615 error = _bus_dmamap_load_plist(dmat, map, mem->u.md_list,
616 mem->md_opaque, &nsegs, flags);
617 break;
618 case MEMDESC_BIO:
619 error = _bus_dmamap_load_bio(dmat, map, mem->u.md_bio,
620 &nsegs, flags);
621 break;
622 case MEMDESC_UIO:
623 error = _bus_dmamap_load_uio(dmat, map, mem->u.md_uio,
624 &nsegs, flags);
625 break;
626 case MEMDESC_MBUF:
627 error = _bus_dmamap_load_mbuf_sg(dmat, map, mem->u.md_mbuf,
628 NULL, &nsegs, flags);
629 break;
630 case MEMDESC_CCB:
631 error = _bus_dmamap_load_ccb(dmat, map, mem->u.md_ccb, &nsegs,
632 flags);
633 break;
634 }
635 nsegs++;
636
637 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
638 __func__, dmat, flags, error, nsegs);
639
640 if (error == EINPROGRESS)
641 return (error);
642
643 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
644 if (error)
645 (*callback)(callback_arg, segs, 0, error);
646 else
647 (*callback)(callback_arg, segs, nsegs, 0);
648
649 /*
650 * Return ENOMEM to the caller so that it can pass it up the stack.
651 * This error only happens when NOWAIT is set, so deferral is disabled.
652 */
653 if (error == ENOMEM)
654 return (error);
655
656 return (0);
657 }
658
659 int
bus_dmamap_load_crp_buffer(bus_dma_tag_t dmat,bus_dmamap_t map,struct crypto_buffer * cb,bus_dmamap_callback_t * callback,void * callback_arg,int flags)660 bus_dmamap_load_crp_buffer(bus_dma_tag_t dmat, bus_dmamap_t map,
661 struct crypto_buffer *cb, bus_dmamap_callback_t *callback,
662 void *callback_arg, int flags)
663 {
664 bus_dma_segment_t *segs;
665 int error;
666 int nsegs;
667
668 flags |= BUS_DMA_NOWAIT;
669 nsegs = -1;
670 error = 0;
671 switch (cb->cb_type) {
672 case CRYPTO_BUF_CONTIG:
673 error = _bus_dmamap_load_buffer(dmat, map, cb->cb_buf,
674 cb->cb_buf_len, kernel_pmap, flags, NULL, &nsegs);
675 break;
676 case CRYPTO_BUF_MBUF:
677 error = _bus_dmamap_load_mbuf_sg(dmat, map, cb->cb_mbuf,
678 NULL, &nsegs, flags);
679 break;
680 case CRYPTO_BUF_SINGLE_MBUF:
681 error = _bus_dmamap_load_single_mbuf(dmat, map, cb->cb_mbuf,
682 NULL, &nsegs, flags);
683 break;
684 case CRYPTO_BUF_UIO:
685 error = _bus_dmamap_load_uio(dmat, map, cb->cb_uio, &nsegs,
686 flags);
687 break;
688 case CRYPTO_BUF_VMPAGE:
689 error = _bus_dmamap_load_ma(dmat, map, cb->cb_vm_page,
690 cb->cb_vm_page_len, cb->cb_vm_page_offset, flags, NULL,
691 &nsegs);
692 break;
693 default:
694 error = EINVAL;
695 }
696 nsegs++;
697
698 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
699 __func__, dmat, flags, error, nsegs);
700
701 if (error == EINPROGRESS)
702 return (error);
703
704 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
705 if (error)
706 (*callback)(callback_arg, segs, 0, error);
707 else
708 (*callback)(callback_arg, segs, nsegs, 0);
709
710 /*
711 * Return ENOMEM to the caller so that it can pass it up the stack.
712 * This error only happens when NOWAIT is set, so deferral is disabled.
713 */
714 if (error == ENOMEM)
715 return (error);
716
717 return (0);
718 }
719
720 int
bus_dmamap_load_crp(bus_dma_tag_t dmat,bus_dmamap_t map,struct cryptop * crp,bus_dmamap_callback_t * callback,void * callback_arg,int flags)721 bus_dmamap_load_crp(bus_dma_tag_t dmat, bus_dmamap_t map, struct cryptop *crp,
722 bus_dmamap_callback_t *callback, void *callback_arg, int flags)
723 {
724 return (bus_dmamap_load_crp_buffer(dmat, map, &crp->crp_buf, callback,
725 callback_arg, flags));
726 }
727
728 void
bus_dma_template_init(bus_dma_template_t * t,bus_dma_tag_t parent)729 bus_dma_template_init(bus_dma_template_t *t, bus_dma_tag_t parent)
730 {
731
732 if (t == NULL)
733 return;
734
735 t->parent = parent;
736 t->alignment = 1;
737 t->boundary = 0;
738 t->lowaddr = t->highaddr = BUS_SPACE_MAXADDR;
739 t->maxsize = t->maxsegsize = BUS_SPACE_MAXSIZE;
740 t->nsegments = BUS_SPACE_UNRESTRICTED;
741 t->lockfunc = NULL;
742 t->lockfuncarg = NULL;
743 t->flags = 0;
744 }
745
746 int
bus_dma_template_tag(bus_dma_template_t * t,bus_dma_tag_t * dmat)747 bus_dma_template_tag(bus_dma_template_t *t, bus_dma_tag_t *dmat)
748 {
749
750 if (t == NULL || dmat == NULL)
751 return (EINVAL);
752
753 return (bus_dma_tag_create(t->parent, t->alignment, t->boundary,
754 t->lowaddr, t->highaddr, NULL, NULL, t->maxsize,
755 t->nsegments, t->maxsegsize, t->flags, t->lockfunc, t->lockfuncarg,
756 dmat));
757 }
758
759 void
bus_dma_template_fill(bus_dma_template_t * t,bus_dma_param_t * kv,u_int count)760 bus_dma_template_fill(bus_dma_template_t *t, bus_dma_param_t *kv, u_int count)
761 {
762 bus_dma_param_t *pkv;
763
764 while (count) {
765 pkv = &kv[--count];
766 switch (pkv->key) {
767 case BD_PARAM_PARENT:
768 t->parent = pkv->ptr;
769 break;
770 case BD_PARAM_ALIGNMENT:
771 t->alignment = pkv->num;
772 break;
773 case BD_PARAM_BOUNDARY:
774 t->boundary = pkv->num;
775 break;
776 case BD_PARAM_LOWADDR:
777 t->lowaddr = pkv->pa;
778 break;
779 case BD_PARAM_HIGHADDR:
780 t->highaddr = pkv->pa;
781 break;
782 case BD_PARAM_MAXSIZE:
783 t->maxsize = pkv->num;
784 break;
785 case BD_PARAM_NSEGMENTS:
786 t->nsegments = pkv->num;
787 break;
788 case BD_PARAM_MAXSEGSIZE:
789 t->maxsegsize = pkv->num;
790 break;
791 case BD_PARAM_FLAGS:
792 t->flags = pkv->num;
793 break;
794 case BD_PARAM_LOCKFUNC:
795 t->lockfunc = pkv->ptr;
796 break;
797 case BD_PARAM_LOCKFUNCARG:
798 t->lockfuncarg = pkv->ptr;
799 break;
800 case BD_PARAM_NAME:
801 t->name = pkv->ptr;
802 break;
803 case BD_PARAM_INVALID:
804 default:
805 KASSERT(0, ("Invalid key %d\n", pkv->key));
806 break;
807 }
808 }
809 return;
810 }
811
812 #ifndef IOMMU
813 bool bus_dma_iommu_set_buswide(device_t dev);
814 int bus_dma_iommu_load_ident(bus_dma_tag_t dmat, bus_dmamap_t map,
815 vm_paddr_t start, vm_size_t length, int flags);
816
817 bool
bus_dma_iommu_set_buswide(device_t dev)818 bus_dma_iommu_set_buswide(device_t dev)
819 {
820 return (false);
821 }
822
823 int
bus_dma_iommu_load_ident(bus_dma_tag_t dmat,bus_dmamap_t map,vm_paddr_t start,vm_size_t length,int flags)824 bus_dma_iommu_load_ident(bus_dma_tag_t dmat, bus_dmamap_t map,
825 vm_paddr_t start, vm_size_t length, int flags)
826 {
827 return (0);
828 }
829 #endif
830