2 * Copyright (c) 2012 EMC Corp.
5 * Copyright (c) 1997, 1998 Justin T. Gibbs.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
37 #include <sys/systm.h>
40 #include <sys/callout.h>
42 #include <sys/memdesc.h>
47 #include <vm/vm_page.h>
48 #include <vm/vm_map.h>
52 #include <cam/cam_ccb.h>
54 #include <machine/bus.h>
57 * Load a list of virtual addresses.
60 _bus_dmamap_load_vlist(bus_dma_tag_t dmat, bus_dmamap_t map,
61 bus_dma_segment_t *list, int sglist_cnt, struct pmap *pmap, int *nsegs,
67 for (; sglist_cnt > 0; sglist_cnt--, list++) {
68 error = _bus_dmamap_load_buffer(dmat, map,
69 (void *)(uintptr_t)list->ds_addr, list->ds_len, pmap,
78 * Load a list of physical addresses.
81 _bus_dmamap_load_plist(bus_dma_tag_t dmat, bus_dmamap_t map,
82 bus_dma_segment_t *list, int sglist_cnt, int *nsegs, int flags)
87 for (; sglist_cnt > 0; sglist_cnt--, list++) {
88 error = _bus_dmamap_load_phys(dmat, map,
89 (vm_paddr_t)list->ds_addr, list->ds_len, flags, NULL,
101 _bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map,
102 struct mbuf *m0, bus_dma_segment_t *segs, int *nsegs, int flags)
108 for (m = m0; m != NULL && error == 0; m = m->m_next) {
110 error = _bus_dmamap_load_buffer(dmat, map, m->m_data,
111 m->m_len, kernel_pmap, flags | BUS_DMA_LOAD_MBUF,
115 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
116 __func__, dmat, flags, error, *nsegs);
121 * Load from block io.
124 _bus_dmamap_load_bio(bus_dma_tag_t dmat, bus_dmamap_t map, struct bio *bio,
125 int *nsegs, int flags)
128 bus_size_t len, tlen;
129 int error, i, ma_offs;
131 if ((bio->bio_flags & BIO_UNMAPPED) == 0) {
132 error = _bus_dmamap_load_buffer(dmat, map, bio->bio_data,
133 bio->bio_bcount, kernel_pmap, flags, NULL, nsegs);
138 tlen = bio->bio_bcount;
139 ma_offs = bio->bio_ma_offset;
140 for (i = 0; tlen > 0; i++, tlen -= len) {
141 len = min(PAGE_SIZE - ma_offs, tlen);
142 paddr = VM_PAGE_TO_PHYS(bio->bio_ma[i]) + ma_offs;
143 error = _bus_dmamap_load_phys(dmat, map, paddr, len,
153 * Load a cam control block.
156 _bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
157 int *nsegs, int flags)
159 struct ccb_hdr *ccb_h;
167 switch (ccb_h->func_code) {
169 struct ccb_scsiio *csio;
172 data_ptr = csio->data_ptr;
173 dxfer_len = csio->dxfer_len;
174 sglist_cnt = csio->sglist_cnt;
177 case XPT_CONT_TARGET_IO: {
178 struct ccb_scsiio *ctio;
181 data_ptr = ctio->data_ptr;
182 dxfer_len = ctio->dxfer_len;
183 sglist_cnt = ctio->sglist_cnt;
187 struct ccb_ataio *ataio;
190 data_ptr = ataio->data_ptr;
191 dxfer_len = ataio->dxfer_len;
196 panic("_bus_dmamap_load_ccb: Unsupported func code %d",
200 switch ((ccb_h->flags & CAM_DATA_MASK)) {
202 error = _bus_dmamap_load_buffer(dmat, map, data_ptr, dxfer_len,
203 kernel_pmap, flags, NULL, nsegs);
206 error = _bus_dmamap_load_phys(dmat, map,
207 (vm_paddr_t)(uintptr_t)data_ptr, dxfer_len, flags, NULL,
211 error = _bus_dmamap_load_vlist(dmat, map,
212 (bus_dma_segment_t *)data_ptr, sglist_cnt, kernel_pmap,
215 case CAM_DATA_SG_PADDR:
216 error = _bus_dmamap_load_plist(dmat, map,
217 (bus_dma_segment_t *)data_ptr, sglist_cnt, nsegs, flags);
220 error = _bus_dmamap_load_bio(dmat, map, (struct bio *)data_ptr,
224 panic("_bus_dmamap_load_ccb: flags 0x%X unimplemented",
234 _bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, struct uio *uio,
235 int *nsegs, int flags)
244 if (uio->uio_segflg == UIO_USERSPACE) {
245 KASSERT(uio->uio_td != NULL,
246 ("bus_dmamap_load_uio: USERSPACE but no proc"));
247 pmap = vmspace_pmap(uio->uio_td->td_proc->p_vmspace);
250 resid = uio->uio_resid;
254 for (i = 0; i < uio->uio_iovcnt && resid != 0 && !error; i++) {
256 * Now at the first iovec to load. Load each iovec
257 * until we have exhausted the residual count.
260 addr = (caddr_t) iov[i].iov_base;
261 minlen = resid < iov[i].iov_len ? resid : iov[i].iov_len;
263 error = _bus_dmamap_load_buffer(dmat, map, addr,
264 minlen, pmap, flags, NULL, nsegs);
273 * Map the buffer buf into bus space using the dmamap map.
276 bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
277 bus_size_t buflen, bus_dmamap_callback_t *callback,
278 void *callback_arg, int flags)
280 bus_dma_segment_t *segs;
285 if ((flags & BUS_DMA_NOWAIT) == 0) {
286 mem = memdesc_vaddr(buf, buflen);
287 _bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
291 error = _bus_dmamap_load_buffer(dmat, map, buf, buflen, kernel_pmap,
292 flags, NULL, &nsegs);
295 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
296 __func__, dmat, flags, error, nsegs);
298 if (error == EINPROGRESS)
301 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
303 (*callback)(callback_arg, segs, 0, error);
305 (*callback)(callback_arg, segs, nsegs, 0);
308 * Return ENOMEM to the caller so that it can pass it up the stack.
309 * This error only happens when NOWAIT is set, so deferral is disabled.
318 bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
319 bus_dmamap_callback2_t *callback, void *callback_arg, int flags)
321 bus_dma_segment_t *segs;
326 flags |= BUS_DMA_NOWAIT;
328 error = _bus_dmamap_load_mbuf_sg(dmat, map, m0, NULL, &nsegs, flags);
331 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
333 (*callback)(callback_arg, segs, 0, 0, error);
335 (*callback)(callback_arg, segs, nsegs, m0->m_pkthdr.len, error);
337 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
338 __func__, dmat, flags, error, nsegs);
343 bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
344 bus_dma_segment_t *segs, int *nsegs, int flags)
348 flags |= BUS_DMA_NOWAIT;
350 error = _bus_dmamap_load_mbuf_sg(dmat, map, m0, segs, nsegs, flags);
352 _bus_dmamap_complete(dmat, map, segs, *nsegs, error);
357 bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, struct uio *uio,
358 bus_dmamap_callback2_t *callback, void *callback_arg, int flags)
360 bus_dma_segment_t *segs;
363 flags |= BUS_DMA_NOWAIT;
365 error = _bus_dmamap_load_uio(dmat, map, uio, &nsegs, flags);
368 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
370 (*callback)(callback_arg, segs, 0, 0, error);
372 (*callback)(callback_arg, segs, nsegs, uio->uio_resid, error);
374 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
375 __func__, dmat, flags, error, nsegs);
380 bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
381 bus_dmamap_callback_t *callback, void *callback_arg,
384 bus_dma_segment_t *segs;
385 struct ccb_hdr *ccb_h;
391 if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_NONE) {
392 callback(callback_arg, NULL, 0, 0);
395 if ((flags & BUS_DMA_NOWAIT) == 0) {
396 mem = memdesc_ccb(ccb);
397 _bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
400 error = _bus_dmamap_load_ccb(dmat, map, ccb, &nsegs, flags);
403 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
404 __func__, dmat, flags, error, nsegs);
406 if (error == EINPROGRESS)
409 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
411 (*callback)(callback_arg, segs, 0, error);
413 (*callback)(callback_arg, segs, nsegs, error);
415 * Return ENOMEM to the caller so that it can pass it up the stack.
416 * This error only happens when NOWAIT is set, so deferral is disabled.
425 bus_dmamap_load_bio(bus_dma_tag_t dmat, bus_dmamap_t map, struct bio *bio,
426 bus_dmamap_callback_t *callback, void *callback_arg,
429 bus_dma_segment_t *segs;
434 if ((flags & BUS_DMA_NOWAIT) == 0) {
435 mem = memdesc_bio(bio);
436 _bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
439 error = _bus_dmamap_load_bio(dmat, map, bio, &nsegs, flags);
442 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
443 __func__, dmat, flags, error, nsegs);
445 if (error == EINPROGRESS)
448 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
450 (*callback)(callback_arg, segs, 0, error);
452 (*callback)(callback_arg, segs, nsegs, error);
454 * Return ENOMEM to the caller so that it can pass it up the stack.
455 * This error only happens when NOWAIT is set, so deferral is disabled.
464 bus_dmamap_load_mem(bus_dma_tag_t dmat, bus_dmamap_t map,
465 struct memdesc *mem, bus_dmamap_callback_t *callback,
466 void *callback_arg, int flags)
468 bus_dma_segment_t *segs;
472 if ((flags & BUS_DMA_NOWAIT) == 0)
473 _bus_dmamap_waitok(dmat, map, mem, callback, callback_arg);
477 switch (mem->md_type) {
479 error = _bus_dmamap_load_buffer(dmat, map, mem->u.md_vaddr,
480 mem->md_opaque, kernel_pmap, flags, NULL, &nsegs);
483 error = _bus_dmamap_load_phys(dmat, map, mem->u.md_paddr,
484 mem->md_opaque, flags, NULL, &nsegs);
487 error = _bus_dmamap_load_vlist(dmat, map, mem->u.md_list,
488 mem->md_opaque, kernel_pmap, &nsegs, flags);
491 error = _bus_dmamap_load_plist(dmat, map, mem->u.md_list,
492 mem->md_opaque, &nsegs, flags);
495 error = _bus_dmamap_load_bio(dmat, map, mem->u.md_bio,
499 error = _bus_dmamap_load_uio(dmat, map, mem->u.md_uio,
503 error = _bus_dmamap_load_mbuf_sg(dmat, map, mem->u.md_mbuf,
504 NULL, &nsegs, flags);
507 error = _bus_dmamap_load_ccb(dmat, map, mem->u.md_ccb, &nsegs,
513 CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
514 __func__, dmat, flags, error, nsegs);
516 if (error == EINPROGRESS)
519 segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
521 (*callback)(callback_arg, segs, 0, error);
523 (*callback)(callback_arg, segs, nsegs, 0);
526 * Return ENOMEM to the caller so that it can pass it up the stack.
527 * This error only happens when NOWAIT is set, so deferral is disabled.