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Merge branch 'features' of git://farnsworth.org/dale/linux-2.6-mv643xx_eth into upstream
[deliverable/linux.git] / drivers / media / video / videobuf-dma-sg.c
1 /*
2 * helper functions for PCI DMA video4linux capture buffers
3 *
4 * The functions expect the hardware being able to scatter gatter
5 * (i.e. the buffers are not linear in physical memory, but fragmented
6 * into PAGE_SIZE chunks). They also assume the driver does not need
7 * to touch the video data.
8 *
9 * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
10 *
11 * Highly based on video-buf written originally by:
12 * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org>
13 * (c) 2006 Mauro Carvalho Chehab, <mchehab@infradead.org>
14 * (c) 2006 Ted Walther and John Sokol
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2
19 */
20
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/moduleparam.h>
24 #include <linux/slab.h>
25 #include <linux/interrupt.h>
26
27 #include <linux/pci.h>
28 #include <linux/vmalloc.h>
29 #include <linux/pagemap.h>
30 #include <linux/scatterlist.h>
31 #include <asm/page.h>
32 #include <asm/pgtable.h>
33
34 #include <media/videobuf-dma-sg.h>
35
36 #define MAGIC_DMABUF 0x19721112
37 #define MAGIC_SG_MEM 0x17890714
38
39 #define MAGIC_CHECK(is,should) if (unlikely((is) != (should))) \
40 { printk(KERN_ERR "magic mismatch: %x (expected %x)\n",is,should); BUG(); }
41
42 static int debug = 0;
43 module_param(debug, int, 0644);
44
45 MODULE_DESCRIPTION("helper module to manage video4linux pci dma sg buffers");
46 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
47 MODULE_LICENSE("GPL");
48
49 #define dprintk(level, fmt, arg...) if (debug >= level) \
50 printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg)
51
52 /* --------------------------------------------------------------------- */
53
54 struct scatterlist*
55 videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages)
56 {
57 struct scatterlist *sglist;
58 struct page *pg;
59 int i;
60
61 sglist = kcalloc(nr_pages, sizeof(struct scatterlist), GFP_KERNEL);
62 if (NULL == sglist)
63 return NULL;
64 sg_init_table(sglist, nr_pages);
65 for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) {
66 pg = vmalloc_to_page(virt);
67 if (NULL == pg)
68 goto err;
69 BUG_ON(PageHighMem(pg));
70 sg_set_page(&sglist[i], pg);
71 sglist[i].length = PAGE_SIZE;
72 }
73 return sglist;
74
75 err:
76 kfree(sglist);
77 return NULL;
78 }
79
80 struct scatterlist*
81 videobuf_pages_to_sg(struct page **pages, int nr_pages, int offset)
82 {
83 struct scatterlist *sglist;
84 int i = 0;
85
86 if (NULL == pages[0])
87 return NULL;
88 sglist = kcalloc(nr_pages, sizeof(*sglist), GFP_KERNEL);
89 if (NULL == sglist)
90 return NULL;
91 sg_init_table(sglist, nr_pages);
92
93 if (NULL == pages[0])
94 goto nopage;
95 if (PageHighMem(pages[0]))
96 /* DMA to highmem pages might not work */
97 goto highmem;
98 sg_set_page(&sglist[0], pages[0]);
99 sglist[0].offset = offset;
100 sglist[0].length = PAGE_SIZE - offset;
101 for (i = 1; i < nr_pages; i++) {
102 if (NULL == pages[i])
103 goto nopage;
104 if (PageHighMem(pages[i]))
105 goto highmem;
106 sg_set_page(&sglist[i], pages[i]);
107 sglist[i].length = PAGE_SIZE;
108 }
109 return sglist;
110
111 nopage:
112 dprintk(2,"sgl: oops - no page\n");
113 kfree(sglist);
114 return NULL;
115
116 highmem:
117 dprintk(2,"sgl: oops - highmem page\n");
118 kfree(sglist);
119 return NULL;
120 }
121
122 /* --------------------------------------------------------------------- */
123
124 struct videobuf_dmabuf *videobuf_to_dma (struct videobuf_buffer *buf)
125 {
126 struct videbuf_pci_sg_memory *mem=buf->priv;
127 BUG_ON (!mem);
128
129 MAGIC_CHECK(mem->magic,MAGIC_SG_MEM);
130
131 return &mem->dma;
132 }
133
134 void videobuf_dma_init(struct videobuf_dmabuf *dma)
135 {
136 memset(dma,0,sizeof(*dma));
137 dma->magic = MAGIC_DMABUF;
138 }
139
140 static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma,
141 int direction, unsigned long data, unsigned long size)
142 {
143 unsigned long first,last;
144 int err, rw = 0;
145
146 dma->direction = direction;
147 switch (dma->direction) {
148 case PCI_DMA_FROMDEVICE: rw = READ; break;
149 case PCI_DMA_TODEVICE: rw = WRITE; break;
150 default: BUG();
151 }
152
153 first = (data & PAGE_MASK) >> PAGE_SHIFT;
154 last = ((data+size-1) & PAGE_MASK) >> PAGE_SHIFT;
155 dma->offset = data & ~PAGE_MASK;
156 dma->nr_pages = last-first+1;
157 dma->pages = kmalloc(dma->nr_pages * sizeof(struct page*),
158 GFP_KERNEL);
159 if (NULL == dma->pages)
160 return -ENOMEM;
161 dprintk(1,"init user [0x%lx+0x%lx => %d pages]\n",
162 data,size,dma->nr_pages);
163
164 dma->varea = (void *) data;
165
166
167 err = get_user_pages(current,current->mm,
168 data & PAGE_MASK, dma->nr_pages,
169 rw == READ, 1, /* force */
170 dma->pages, NULL);
171
172 if (err != dma->nr_pages) {
173 dma->nr_pages = (err >= 0) ? err : 0;
174 dprintk(1,"get_user_pages: err=%d [%d]\n",err,dma->nr_pages);
175 return err < 0 ? err : -EINVAL;
176 }
177 return 0;
178 }
179
180 int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction,
181 unsigned long data, unsigned long size)
182 {
183 int ret;
184 down_read(&current->mm->mmap_sem);
185 ret = videobuf_dma_init_user_locked(dma, direction, data, size);
186 up_read(&current->mm->mmap_sem);
187
188 return ret;
189 }
190
191 int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction,
192 int nr_pages)
193 {
194 dprintk(1,"init kernel [%d pages]\n",nr_pages);
195 dma->direction = direction;
196 dma->vmalloc = vmalloc_32(nr_pages << PAGE_SHIFT);
197 if (NULL == dma->vmalloc) {
198 dprintk(1,"vmalloc_32(%d pages) failed\n",nr_pages);
199 return -ENOMEM;
200 }
201 dprintk(1,"vmalloc is at addr 0x%08lx, size=%d\n",
202 (unsigned long)dma->vmalloc,
203 nr_pages << PAGE_SHIFT);
204 memset(dma->vmalloc,0,nr_pages << PAGE_SHIFT);
205 dma->nr_pages = nr_pages;
206 return 0;
207 }
208
209 int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction,
210 dma_addr_t addr, int nr_pages)
211 {
212 dprintk(1,"init overlay [%d pages @ bus 0x%lx]\n",
213 nr_pages,(unsigned long)addr);
214 dma->direction = direction;
215 if (0 == addr)
216 return -EINVAL;
217
218 dma->bus_addr = addr;
219 dma->nr_pages = nr_pages;
220 return 0;
221 }
222
223 int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma)
224 {
225 void *dev=q->dev;
226
227 MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
228 BUG_ON(0 == dma->nr_pages);
229
230 if (dma->pages) {
231 dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages,
232 dma->offset);
233 }
234 if (dma->vmalloc) {
235 dma->sglist = videobuf_vmalloc_to_sg
236 (dma->vmalloc,dma->nr_pages);
237 }
238 if (dma->bus_addr) {
239 dma->sglist = kmalloc(sizeof(struct scatterlist), GFP_KERNEL);
240 if (NULL != dma->sglist) {
241 dma->sglen = 1;
242 sg_dma_address(&dma->sglist[0]) = dma->bus_addr & PAGE_MASK;
243 dma->sglist[0].offset = dma->bus_addr & ~PAGE_MASK;
244 sg_dma_len(&dma->sglist[0]) = dma->nr_pages * PAGE_SIZE;
245 }
246 }
247 if (NULL == dma->sglist) {
248 dprintk(1,"scatterlist is NULL\n");
249 return -ENOMEM;
250 }
251 if (!dma->bus_addr) {
252 dma->sglen = pci_map_sg(dev,dma->sglist,
253 dma->nr_pages, dma->direction);
254 if (0 == dma->sglen) {
255 printk(KERN_WARNING
256 "%s: videobuf_map_sg failed\n",__FUNCTION__);
257 kfree(dma->sglist);
258 dma->sglist = NULL;
259 dma->sglen = 0;
260 return -EIO;
261 }
262 }
263 return 0;
264 }
265
266 int videobuf_dma_sync(struct videobuf_queue *q,struct videobuf_dmabuf *dma)
267 {
268 void *dev=q->dev;
269
270 MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
271 BUG_ON(!dma->sglen);
272
273 pci_dma_sync_sg_for_cpu (dev,dma->sglist,dma->nr_pages,dma->direction);
274 return 0;
275 }
276
277 int videobuf_dma_unmap(struct videobuf_queue* q,struct videobuf_dmabuf *dma)
278 {
279 void *dev=q->dev;
280
281 MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
282 if (!dma->sglen)
283 return 0;
284
285 pci_unmap_sg (dev,dma->sglist,dma->nr_pages,dma->direction);
286
287 kfree(dma->sglist);
288 dma->sglist = NULL;
289 dma->sglen = 0;
290 return 0;
291 }
292
293 int videobuf_dma_free(struct videobuf_dmabuf *dma)
294 {
295 MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
296 BUG_ON(dma->sglen);
297
298 if (dma->pages) {
299 int i;
300 for (i=0; i < dma->nr_pages; i++)
301 page_cache_release(dma->pages[i]);
302 kfree(dma->pages);
303 dma->pages = NULL;
304 }
305
306 vfree(dma->vmalloc);
307 dma->vmalloc = NULL;
308 dma->varea = NULL;
309
310 if (dma->bus_addr) {
311 dma->bus_addr = 0;
312 }
313 dma->direction = PCI_DMA_NONE;
314 return 0;
315 }
316
317 /* --------------------------------------------------------------------- */
318
319 int videobuf_pci_dma_map(struct pci_dev *pci,struct videobuf_dmabuf *dma)
320 {
321 struct videobuf_queue q;
322
323 q.dev=pci;
324
325 return (videobuf_dma_map(&q,dma));
326 }
327
328 int videobuf_pci_dma_unmap(struct pci_dev *pci,struct videobuf_dmabuf *dma)
329 {
330 struct videobuf_queue q;
331
332 q.dev=pci;
333
334 return (videobuf_dma_unmap(&q,dma));
335 }
336
337 /* --------------------------------------------------------------------- */
338
339 static void
340 videobuf_vm_open(struct vm_area_struct *vma)
341 {
342 struct videobuf_mapping *map = vma->vm_private_data;
343
344 dprintk(2,"vm_open %p [count=%d,vma=%08lx-%08lx]\n",map,
345 map->count,vma->vm_start,vma->vm_end);
346 map->count++;
347 }
348
349 static void
350 videobuf_vm_close(struct vm_area_struct *vma)
351 {
352 struct videobuf_mapping *map = vma->vm_private_data;
353 struct videobuf_queue *q = map->q;
354 struct videbuf_pci_sg_memory *mem;
355 int i;
356
357 dprintk(2,"vm_close %p [count=%d,vma=%08lx-%08lx]\n",map,
358 map->count,vma->vm_start,vma->vm_end);
359
360 map->count--;
361 if (0 == map->count) {
362 dprintk(1,"munmap %p q=%p\n",map,q);
363 mutex_lock(&q->lock);
364 for (i = 0; i < VIDEO_MAX_FRAME; i++) {
365 if (NULL == q->bufs[i])
366 continue;
367 mem=q->bufs[i]->priv;
368
369 if (!mem)
370 continue;
371
372 MAGIC_CHECK(mem->magic,MAGIC_SG_MEM);
373
374 if (q->bufs[i]->map != map)
375 continue;
376 q->bufs[i]->map = NULL;
377 q->bufs[i]->baddr = 0;
378 q->ops->buf_release(q,q->bufs[i]);
379 }
380 mutex_unlock(&q->lock);
381 kfree(map);
382 }
383 return;
384 }
385
386 /*
387 * Get a anonymous page for the mapping. Make sure we can DMA to that
388 * memory location with 32bit PCI devices (i.e. don't use highmem for
389 * now ...). Bounce buffers don't work very well for the data rates
390 * video capture has.
391 */
392 static struct page*
393 videobuf_vm_nopage(struct vm_area_struct *vma, unsigned long vaddr,
394 int *type)
395 {
396 struct page *page;
397
398 dprintk(3,"nopage: fault @ %08lx [vma %08lx-%08lx]\n",
399 vaddr,vma->vm_start,vma->vm_end);
400 if (vaddr > vma->vm_end)
401 return NOPAGE_SIGBUS;
402 page = alloc_page(GFP_USER | __GFP_DMA32);
403 if (!page)
404 return NOPAGE_OOM;
405 clear_user_page(page_address(page), vaddr, page);
406 if (type)
407 *type = VM_FAULT_MINOR;
408 return page;
409 }
410
411 static struct vm_operations_struct videobuf_vm_ops =
412 {
413 .open = videobuf_vm_open,
414 .close = videobuf_vm_close,
415 .nopage = videobuf_vm_nopage,
416 };
417
418 /* ---------------------------------------------------------------------
419 * PCI handlers for the generic methods
420 */
421
422 /* Allocated area consists on 3 parts:
423 struct video_buffer
424 struct <driver>_buffer (cx88_buffer, saa7134_buf, ...)
425 struct videobuf_pci_sg_memory
426 */
427
428 static void *__videobuf_alloc(size_t size)
429 {
430 struct videbuf_pci_sg_memory *mem;
431 struct videobuf_buffer *vb;
432
433 vb = kzalloc(size+sizeof(*mem),GFP_KERNEL);
434
435 mem = vb->priv = ((char *)vb)+size;
436 mem->magic=MAGIC_SG_MEM;
437
438 videobuf_dma_init(&mem->dma);
439
440 dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
441 __FUNCTION__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb),
442 mem,(long)sizeof(*mem));
443
444 return vb;
445 }
446
447 static int __videobuf_iolock (struct videobuf_queue* q,
448 struct videobuf_buffer *vb,
449 struct v4l2_framebuffer *fbuf)
450 {
451 int err,pages;
452 dma_addr_t bus;
453 struct videbuf_pci_sg_memory *mem=vb->priv;
454 BUG_ON(!mem);
455
456 MAGIC_CHECK(mem->magic,MAGIC_SG_MEM);
457
458 switch (vb->memory) {
459 case V4L2_MEMORY_MMAP:
460 case V4L2_MEMORY_USERPTR:
461 if (0 == vb->baddr) {
462 /* no userspace addr -- kernel bounce buffer */
463 pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
464 err = videobuf_dma_init_kernel( &mem->dma,
465 PCI_DMA_FROMDEVICE,
466 pages );
467 if (0 != err)
468 return err;
469 } else if (vb->memory == V4L2_MEMORY_USERPTR) {
470 /* dma directly to userspace */
471 err = videobuf_dma_init_user( &mem->dma,
472 PCI_DMA_FROMDEVICE,
473 vb->baddr,vb->bsize );
474 if (0 != err)
475 return err;
476 } else {
477 /* NOTE: HACK: videobuf_iolock on V4L2_MEMORY_MMAP
478 buffers can only be called from videobuf_qbuf
479 we take current->mm->mmap_sem there, to prevent
480 locking inversion, so don't take it here */
481
482 err = videobuf_dma_init_user_locked(&mem->dma,
483 PCI_DMA_FROMDEVICE,
484 vb->baddr, vb->bsize);
485 if (0 != err)
486 return err;
487 }
488 break;
489 case V4L2_MEMORY_OVERLAY:
490 if (NULL == fbuf)
491 return -EINVAL;
492 /* FIXME: need sanity checks for vb->boff */
493 /*
494 * Using a double cast to avoid compiler warnings when
495 * building for PAE. Compiler doesn't like direct casting
496 * of a 32 bit ptr to 64 bit integer.
497 */
498 bus = (dma_addr_t)(unsigned long)fbuf->base + vb->boff;
499 pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
500 err = videobuf_dma_init_overlay(&mem->dma,PCI_DMA_FROMDEVICE,
501 bus, pages);
502 if (0 != err)
503 return err;
504 break;
505 default:
506 BUG();
507 }
508 err = videobuf_dma_map(q,&mem->dma);
509 if (0 != err)
510 return err;
511
512 return 0;
513 }
514
515 static int __videobuf_sync(struct videobuf_queue *q,
516 struct videobuf_buffer *buf)
517 {
518 struct videbuf_pci_sg_memory *mem=buf->priv;
519 BUG_ON (!mem);
520 MAGIC_CHECK(mem->magic,MAGIC_SG_MEM);
521
522 return videobuf_dma_sync(q,&mem->dma);
523 }
524
525 static int __videobuf_mmap_free(struct videobuf_queue *q)
526 {
527 int i;
528
529 for (i = 0; i < VIDEO_MAX_FRAME; i++) {
530 if (q->bufs[i]) {
531 if (q->bufs[i]->map)
532 return -EBUSY;
533 }
534 }
535
536 return 0;
537 }
538
539 static int __videobuf_mmap_mapper(struct videobuf_queue *q,
540 struct vm_area_struct *vma)
541 {
542 struct videbuf_pci_sg_memory *mem;
543 struct videobuf_mapping *map;
544 unsigned int first,last,size,i;
545 int retval;
546
547 retval = -EINVAL;
548 if (!(vma->vm_flags & VM_WRITE)) {
549 dprintk(1,"mmap app bug: PROT_WRITE please\n");
550 goto done;
551 }
552 if (!(vma->vm_flags & VM_SHARED)) {
553 dprintk(1,"mmap app bug: MAP_SHARED please\n");
554 goto done;
555 }
556
557 /* look for first buffer to map */
558 for (first = 0; first < VIDEO_MAX_FRAME; first++) {
559 if (NULL == q->bufs[first])
560 continue;
561 mem=q->bufs[first]->priv;
562 BUG_ON (!mem);
563 MAGIC_CHECK(mem->magic,MAGIC_SG_MEM);
564
565 if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
566 continue;
567 if (q->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT))
568 break;
569 }
570 if (VIDEO_MAX_FRAME == first) {
571 dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n",
572 (vma->vm_pgoff << PAGE_SHIFT));
573 goto done;
574 }
575
576 /* look for last buffer to map */
577 for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) {
578 if (NULL == q->bufs[last])
579 continue;
580 if (V4L2_MEMORY_MMAP != q->bufs[last]->memory)
581 continue;
582 if (q->bufs[last]->map) {
583 retval = -EBUSY;
584 goto done;
585 }
586 size += q->bufs[last]->bsize;
587 if (size == (vma->vm_end - vma->vm_start))
588 break;
589 }
590 if (VIDEO_MAX_FRAME == last) {
591 dprintk(1,"mmap app bug: size invalid [size=0x%lx]\n",
592 (vma->vm_end - vma->vm_start));
593 goto done;
594 }
595
596 /* create mapping + update buffer list */
597 retval = -ENOMEM;
598 map = kmalloc(sizeof(struct videobuf_mapping),GFP_KERNEL);
599 if (NULL == map)
600 goto done;
601 for (size = 0, i = first; i <= last; size += q->bufs[i++]->bsize) {
602 q->bufs[i]->map = map;
603 q->bufs[i]->baddr = vma->vm_start + size;
604 }
605 map->count = 1;
606 map->start = vma->vm_start;
607 map->end = vma->vm_end;
608 map->q = q;
609 vma->vm_ops = &videobuf_vm_ops;
610 vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
611 vma->vm_flags &= ~VM_IO; /* using shared anonymous pages */
612 vma->vm_private_data = map;
613 dprintk(1,"mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n",
614 map,q,vma->vm_start,vma->vm_end,vma->vm_pgoff,first,last);
615 retval = 0;
616
617 done:
618 return retval;
619 }
620
621 static int __videobuf_copy_to_user ( struct videobuf_queue *q,
622 char __user *data, size_t count,
623 int nonblocking )
624 {
625 struct videbuf_pci_sg_memory *mem=q->read_buf->priv;
626 BUG_ON (!mem);
627 MAGIC_CHECK(mem->magic,MAGIC_SG_MEM);
628
629 /* copy to userspace */
630 if (count > q->read_buf->size - q->read_off)
631 count = q->read_buf->size - q->read_off;
632
633 if (copy_to_user(data, mem->dma.vmalloc+q->read_off, count))
634 return -EFAULT;
635
636 return count;
637 }
638
639 static int __videobuf_copy_stream ( struct videobuf_queue *q,
640 char __user *data, size_t count, size_t pos,
641 int vbihack, int nonblocking )
642 {
643 unsigned int *fc;
644 struct videbuf_pci_sg_memory *mem=q->read_buf->priv;
645 BUG_ON (!mem);
646 MAGIC_CHECK(mem->magic,MAGIC_SG_MEM);
647
648 if (vbihack) {
649 /* dirty, undocumented hack -- pass the frame counter
650 * within the last four bytes of each vbi data block.
651 * We need that one to maintain backward compatibility
652 * to all vbi decoding software out there ... */
653 fc = (unsigned int*)mem->dma.vmalloc;
654 fc += (q->read_buf->size>>2) -1;
655 *fc = q->read_buf->field_count >> 1;
656 dprintk(1,"vbihack: %d\n",*fc);
657 }
658
659 /* copy stuff using the common method */
660 count = __videobuf_copy_to_user (q,data,count,nonblocking);
661
662 if ( (count==-EFAULT) && (0 == pos) )
663 return -EFAULT;
664
665 return count;
666 }
667
668 static struct videobuf_qtype_ops pci_ops = {
669 .magic = MAGIC_QTYPE_OPS,
670
671 .alloc = __videobuf_alloc,
672 .iolock = __videobuf_iolock,
673 .sync = __videobuf_sync,
674 .mmap_free = __videobuf_mmap_free,
675 .mmap_mapper = __videobuf_mmap_mapper,
676 .video_copy_to_user = __videobuf_copy_to_user,
677 .copy_stream = __videobuf_copy_stream,
678 };
679
680 void *videobuf_pci_alloc (size_t size)
681 {
682 struct videobuf_queue q;
683
684 /* Required to make generic handler to call __videobuf_alloc */
685 q.int_ops=&pci_ops;
686
687 q.msize=size;
688
689 return videobuf_alloc (&q);
690 }
691
692 void videobuf_queue_pci_init(struct videobuf_queue* q,
693 struct videobuf_queue_ops *ops,
694 void *dev,
695 spinlock_t *irqlock,
696 enum v4l2_buf_type type,
697 enum v4l2_field field,
698 unsigned int msize,
699 void *priv)
700 {
701 videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
702 priv, &pci_ops);
703 }
704
705 /* --------------------------------------------------------------------- */
706
707 EXPORT_SYMBOL_GPL(videobuf_vmalloc_to_sg);
708
709 EXPORT_SYMBOL_GPL(videobuf_to_dma);
710 EXPORT_SYMBOL_GPL(videobuf_dma_init);
711 EXPORT_SYMBOL_GPL(videobuf_dma_init_user);
712 EXPORT_SYMBOL_GPL(videobuf_dma_init_kernel);
713 EXPORT_SYMBOL_GPL(videobuf_dma_init_overlay);
714 EXPORT_SYMBOL_GPL(videobuf_dma_map);
715 EXPORT_SYMBOL_GPL(videobuf_dma_sync);
716 EXPORT_SYMBOL_GPL(videobuf_dma_unmap);
717 EXPORT_SYMBOL_GPL(videobuf_dma_free);
718
719 EXPORT_SYMBOL_GPL(videobuf_pci_dma_map);
720 EXPORT_SYMBOL_GPL(videobuf_pci_dma_unmap);
721 EXPORT_SYMBOL_GPL(videobuf_pci_alloc);
722
723 EXPORT_SYMBOL_GPL(videobuf_queue_pci_init);
724
725 /*
726 * Local variables:
727 * c-basic-offset: 8
728 * End:
729 */
Linux kernel - Deliverables
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