Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[linux-2.6] / drivers / media / video / video-buf.c
1 /*
2  *
3  * generic helper functions for video4linux capture buffers, to handle
4  * memory management and PCI DMA.
5  * Right now, bttv, saa7134, saa7146 and cx88 use it.
6  *
7  * The functions expect the hardware being able to scatter gatter
8  * (i.e. the buffers are not linear in physical memory, but fragmented
9  * into PAGE_SIZE chunks).  They also assume the driver does not need
10  * to touch the video data.
11  *
12  * device specific map/unmap/sync stuff now are mapped as operations
13  * to allow its usage by USB and virtual devices.
14  *
15  * (c) 2001-2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]
16  * (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
17  * (c) 2006 Ted Walther and John Sokol
18  *
19  * This program is free software; you can redistribute it and/or modify
20  * it under the terms of the GNU General Public License as published by
21  * the Free Software Foundation; either version 2 of the License, or
22  * (at your option) any later version.
23  */
24
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/vmalloc.h>
29 #include <linux/pagemap.h>
30 #include <linux/slab.h>
31 #include <linux/pci.h>
32 #include <linux/interrupt.h>
33 #include <asm/page.h>
34 #include <asm/pgtable.h>
35
36 #include <media/video-buf.h>
37
38 #define MAGIC_DMABUF 0x19721112
39 #define MAGIC_BUFFER 0x20040302
40 #define MAGIC_CHECK(is,should)  if (unlikely((is) != (should))) \
41         { printk(KERN_ERR "magic mismatch: %x (expected %x)\n",is,should); BUG(); }
42
43 static int debug = 0;
44 module_param(debug, int, 0644);
45
46 MODULE_DESCRIPTION("helper module to manage video4linux pci dma buffers");
47 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
48 MODULE_LICENSE("GPL");
49
50 #define dprintk(level, fmt, arg...)     if (debug >= level) \
51         printk(KERN_DEBUG "vbuf: " fmt , ## arg)
52
53 struct scatterlist*
54 videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages)
55 {
56         struct scatterlist *sglist;
57         struct page *pg;
58         int i;
59
60         sglist = kcalloc(nr_pages, sizeof(struct scatterlist), GFP_KERNEL);
61         if (NULL == sglist)
62                 return NULL;
63         for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) {
64                 pg = vmalloc_to_page(virt);
65                 if (NULL == pg)
66                         goto err;
67                 BUG_ON(PageHighMem(pg));
68                 sglist[i].page   = pg;
69                 sglist[i].length = PAGE_SIZE;
70         }
71         return sglist;
72
73  err:
74         kfree(sglist);
75         return NULL;
76 }
77
78 struct scatterlist*
79 videobuf_pages_to_sg(struct page **pages, int nr_pages, int offset)
80 {
81         struct scatterlist *sglist;
82         int i = 0;
83
84         if (NULL == pages[0])
85                 return NULL;
86         sglist = kcalloc(nr_pages, sizeof(*sglist), GFP_KERNEL);
87         if (NULL == sglist)
88                 return NULL;
89
90         if (NULL == pages[0])
91                 goto nopage;
92         if (PageHighMem(pages[0]))
93                 /* DMA to highmem pages might not work */
94                 goto highmem;
95         sglist[0].page   = pages[0];
96         sglist[0].offset = offset;
97         sglist[0].length = PAGE_SIZE - offset;
98         for (i = 1; i < nr_pages; i++) {
99                 if (NULL == pages[i])
100                         goto nopage;
101                 if (PageHighMem(pages[i]))
102                         goto highmem;
103                 sglist[i].page   = pages[i];
104                 sglist[i].length = PAGE_SIZE;
105         }
106         return sglist;
107
108  nopage:
109         dprintk(2,"sgl: oops - no page\n");
110         kfree(sglist);
111         return NULL;
112
113  highmem:
114         dprintk(2,"sgl: oops - highmem page\n");
115         kfree(sglist);
116         return NULL;
117 }
118
119 /* --------------------------------------------------------------------- */
120
121 void videobuf_dma_init(struct videobuf_dmabuf *dma)
122 {
123         memset(dma,0,sizeof(*dma));
124         dma->magic = MAGIC_DMABUF;
125 }
126
127 int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction,
128                            unsigned long data, unsigned long size)
129 {
130         unsigned long first,last;
131         int err, rw = 0;
132
133         dma->direction = direction;
134         switch (dma->direction) {
135         case PCI_DMA_FROMDEVICE: rw = READ;  break;
136         case PCI_DMA_TODEVICE:   rw = WRITE; break;
137         default:                 BUG();
138         }
139
140         first = (data          & PAGE_MASK) >> PAGE_SHIFT;
141         last  = ((data+size-1) & PAGE_MASK) >> PAGE_SHIFT;
142         dma->offset   = data & ~PAGE_MASK;
143         dma->nr_pages = last-first+1;
144         dma->pages = kmalloc(dma->nr_pages * sizeof(struct page*),
145                              GFP_KERNEL);
146         if (NULL == dma->pages)
147                 return -ENOMEM;
148         dprintk(1,"init user [0x%lx+0x%lx => %d pages]\n",
149                 data,size,dma->nr_pages);
150
151         down_read(&current->mm->mmap_sem);
152         err = get_user_pages(current,current->mm,
153                              data & PAGE_MASK, dma->nr_pages,
154                              rw == READ, 1, /* force */
155                              dma->pages, NULL);
156         up_read(&current->mm->mmap_sem);
157         if (err != dma->nr_pages) {
158                 dma->nr_pages = (err >= 0) ? err : 0;
159                 dprintk(1,"get_user_pages: err=%d [%d]\n",err,dma->nr_pages);
160                 return err < 0 ? err : -EINVAL;
161         }
162         return 0;
163 }
164
165 int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction,
166                              int nr_pages)
167 {
168         dprintk(1,"init kernel [%d pages]\n",nr_pages);
169         dma->direction = direction;
170         dma->vmalloc = vmalloc_32(nr_pages << PAGE_SHIFT);
171         if (NULL == dma->vmalloc) {
172                 dprintk(1,"vmalloc_32(%d pages) failed\n",nr_pages);
173                 return -ENOMEM;
174         }
175         dprintk(1,"vmalloc is at addr 0x%08lx, size=%d\n",
176                                 (unsigned long)dma->vmalloc,
177                                 nr_pages << PAGE_SHIFT);
178         memset(dma->vmalloc,0,nr_pages << PAGE_SHIFT);
179         dma->nr_pages = nr_pages;
180         return 0;
181 }
182
183 int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction,
184                               dma_addr_t addr, int nr_pages)
185 {
186         dprintk(1,"init overlay [%d pages @ bus 0x%lx]\n",
187                 nr_pages,(unsigned long)addr);
188         dma->direction = direction;
189         if (0 == addr)
190                 return -EINVAL;
191
192         dma->bus_addr = addr;
193         dma->nr_pages = nr_pages;
194         return 0;
195 }
196
197 int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma)
198 {
199         void                   *dev=q->dev;
200
201         MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
202         BUG_ON(0 == dma->nr_pages);
203
204         if (dma->pages) {
205                 dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages,
206                                                    dma->offset);
207         }
208         if (dma->vmalloc) {
209                 dma->sglist = videobuf_vmalloc_to_sg
210                                                 (dma->vmalloc,dma->nr_pages);
211         }
212         if (dma->bus_addr) {
213                 dma->sglist = kmalloc(sizeof(struct scatterlist), GFP_KERNEL);
214                 if (NULL != dma->sglist) {
215                         dma->sglen  = 1;
216                         sg_dma_address(&dma->sglist[0]) = dma->bus_addr & PAGE_MASK;
217                         dma->sglist[0].offset           = dma->bus_addr & ~PAGE_MASK;
218                         sg_dma_len(&dma->sglist[0])     = dma->nr_pages * PAGE_SIZE;
219                 }
220         }
221         if (NULL == dma->sglist) {
222                 dprintk(1,"scatterlist is NULL\n");
223                 return -ENOMEM;
224         }
225         if (!dma->bus_addr) {
226                 if (q->ops->vb_map_sg) {
227                         dma->sglen = q->ops->vb_map_sg(dev,dma->sglist,
228                                         dma->nr_pages, dma->direction);
229                 }
230                 if (0 == dma->sglen) {
231                         printk(KERN_WARNING
232                                "%s: videobuf_map_sg failed\n",__FUNCTION__);
233                         kfree(dma->sglist);
234                         dma->sglist = NULL;
235                         dma->sglen = 0;
236                         return -EIO;
237                 }
238         }
239         return 0;
240 }
241
242 int videobuf_dma_sync(struct videobuf_queue* q,struct videobuf_dmabuf *dma)
243 {
244         void                   *dev=q->dev;
245
246         MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
247         BUG_ON(!dma->sglen);
248
249         if (!dma->bus_addr && q->ops->vb_dma_sync_sg)
250                 q->ops->vb_dma_sync_sg(dev,dma->sglist,dma->nr_pages,
251                                                         dma->direction);
252
253         return 0;
254 }
255
256 int videobuf_dma_unmap(struct videobuf_queue* q,struct videobuf_dmabuf *dma)
257 {
258         void                   *dev=q->dev;
259
260         MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
261         if (!dma->sglen)
262                 return 0;
263
264         if (!dma->bus_addr && q->ops->vb_unmap_sg)
265                         q->ops->vb_unmap_sg(dev,dma->sglist,dma->nr_pages,
266                                                         dma->direction);
267         kfree(dma->sglist);
268         dma->sglist = NULL;
269         dma->sglen = 0;
270         return 0;
271 }
272
273 int videobuf_dma_free(struct videobuf_dmabuf *dma)
274 {
275         MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
276         BUG_ON(dma->sglen);
277
278         if (dma->pages) {
279                 int i;
280                 for (i=0; i < dma->nr_pages; i++)
281                         page_cache_release(dma->pages[i]);
282                 kfree(dma->pages);
283                 dma->pages = NULL;
284         }
285
286         vfree(dma->vmalloc);
287         dma->vmalloc = NULL;
288
289         if (dma->bus_addr) {
290                 dma->bus_addr = 0;
291         }
292         dma->direction = PCI_DMA_NONE;
293         return 0;
294 }
295
296 /* --------------------------------------------------------------------- */
297
298 void* videobuf_alloc(unsigned int size)
299 {
300         struct videobuf_buffer *vb;
301
302         vb = kzalloc(size,GFP_KERNEL);
303         if (NULL != vb) {
304                 videobuf_dma_init(&vb->dma);
305                 init_waitqueue_head(&vb->done);
306                 vb->magic     = MAGIC_BUFFER;
307         }
308         return vb;
309 }
310
311 int videobuf_waiton(struct videobuf_buffer *vb, int non_blocking, int intr)
312 {
313         int retval = 0;
314         DECLARE_WAITQUEUE(wait, current);
315
316         MAGIC_CHECK(vb->magic,MAGIC_BUFFER);
317         add_wait_queue(&vb->done, &wait);
318         while (vb->state == STATE_ACTIVE || vb->state == STATE_QUEUED) {
319                 if (non_blocking) {
320                         retval = -EAGAIN;
321                         break;
322                 }
323                 set_current_state(intr  ? TASK_INTERRUPTIBLE
324                                         : TASK_UNINTERRUPTIBLE);
325                 if (vb->state == STATE_ACTIVE || vb->state == STATE_QUEUED)
326                         schedule();
327                 set_current_state(TASK_RUNNING);
328                 if (intr && signal_pending(current)) {
329                         dprintk(1,"buffer waiton: -EINTR\n");
330                         retval = -EINTR;
331                         break;
332                 }
333         }
334         remove_wait_queue(&vb->done, &wait);
335         return retval;
336 }
337
338 int
339 videobuf_iolock(struct videobuf_queue* q, struct videobuf_buffer *vb,
340                 struct v4l2_framebuffer *fbuf)
341 {
342         int err,pages;
343         dma_addr_t bus;
344
345         MAGIC_CHECK(vb->magic,MAGIC_BUFFER);
346         switch (vb->memory) {
347         case V4L2_MEMORY_MMAP:
348         case V4L2_MEMORY_USERPTR:
349                 if (0 == vb->baddr) {
350                         /* no userspace addr -- kernel bounce buffer */
351                         pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
352                         err = videobuf_dma_init_kernel(&vb->dma,PCI_DMA_FROMDEVICE,
353                                                        pages);
354                         if (0 != err)
355                                 return err;
356                 } else {
357                         /* dma directly to userspace */
358                         err = videobuf_dma_init_user(&vb->dma,PCI_DMA_FROMDEVICE,
359                                                      vb->baddr,vb->bsize);
360                         if (0 != err)
361                                 return err;
362                 }
363                 break;
364         case V4L2_MEMORY_OVERLAY:
365                 if (NULL == fbuf)
366                         return -EINVAL;
367                 /* FIXME: need sanity checks for vb->boff */
368                 bus   = (dma_addr_t)fbuf->base + vb->boff;
369                 pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
370                 err = videobuf_dma_init_overlay(&vb->dma,PCI_DMA_FROMDEVICE,
371                                                 bus, pages);
372                 if (0 != err)
373                         return err;
374                 break;
375         default:
376                 BUG();
377         }
378         err = videobuf_dma_map(q,&vb->dma);
379         if (0 != err)
380                 return err;
381
382         return 0;
383 }
384
385 /* --------------------------------------------------------------------- */
386
387 void videobuf_queue_pci(struct videobuf_queue* q)
388 {
389         /* If not specified, defaults to PCI map sg */
390         if (!q->ops->vb_map_sg)
391                 q->ops->vb_map_sg=(vb_map_sg_t *)pci_map_sg;
392
393         if (!q->ops->vb_dma_sync_sg)
394                 q->ops->vb_dma_sync_sg=(vb_map_sg_t *)pci_dma_sync_sg_for_cpu;
395         if (!q->ops->vb_unmap_sg)
396                 q->ops->vb_unmap_sg=(vb_map_sg_t *)pci_unmap_sg;
397 }
398
399 int videobuf_pci_dma_map(struct pci_dev *pci,struct videobuf_dmabuf *dma)
400 {
401         struct videobuf_queue q;
402
403         q.dev=pci;
404         q.ops->vb_map_sg=(vb_map_sg_t *)pci_unmap_sg;
405
406         return (videobuf_dma_unmap(&q,dma));
407 }
408
409 int videobuf_pci_dma_unmap(struct pci_dev *pci,struct videobuf_dmabuf *dma)
410 {
411         struct videobuf_queue q;
412
413         q.dev=pci;
414         q.ops->vb_map_sg=(vb_map_sg_t *)pci_unmap_sg;
415
416         return (videobuf_dma_unmap(&q,dma));
417 }
418
419 void videobuf_queue_init(struct videobuf_queue* q,
420                          struct videobuf_queue_ops *ops,
421                          void *dev,
422                          spinlock_t *irqlock,
423                          enum v4l2_buf_type type,
424                          enum v4l2_field field,
425                          unsigned int msize,
426                          void *priv)
427 {
428         memset(q,0,sizeof(*q));
429         q->irqlock = irqlock;
430         q->dev     = dev;
431         q->type    = type;
432         q->field   = field;
433         q->msize   = msize;
434         q->ops     = ops;
435         q->priv_data = priv;
436
437         videobuf_queue_pci(q);
438
439         mutex_init(&q->lock);
440         INIT_LIST_HEAD(&q->stream);
441 }
442
443 int
444 videobuf_queue_is_busy(struct videobuf_queue *q)
445 {
446         int i;
447
448         if (q->streaming) {
449                 dprintk(1,"busy: streaming active\n");
450                 return 1;
451         }
452         if (q->reading) {
453                 dprintk(1,"busy: pending read #1\n");
454                 return 1;
455         }
456         if (q->read_buf) {
457                 dprintk(1,"busy: pending read #2\n");
458                 return 1;
459         }
460         for (i = 0; i < VIDEO_MAX_FRAME; i++) {
461                 if (NULL == q->bufs[i])
462                         continue;
463                 if (q->bufs[i]->map) {
464                         dprintk(1,"busy: buffer #%d mapped\n",i);
465                         return 1;
466                 }
467                 if (q->bufs[i]->state == STATE_QUEUED) {
468                         dprintk(1,"busy: buffer #%d queued\n",i);
469                         return 1;
470                 }
471                 if (q->bufs[i]->state == STATE_ACTIVE) {
472                         dprintk(1,"busy: buffer #%d avtive\n",i);
473                         return 1;
474                 }
475         }
476         return 0;
477 }
478
479 void
480 videobuf_queue_cancel(struct videobuf_queue *q)
481 {
482         unsigned long flags=0;
483         int i;
484
485         /* remove queued buffers from list */
486         if (q->irqlock)
487                 spin_lock_irqsave(q->irqlock,flags);
488         for (i = 0; i < VIDEO_MAX_FRAME; i++) {
489                 if (NULL == q->bufs[i])
490                         continue;
491                 if (q->bufs[i]->state == STATE_QUEUED) {
492                         list_del(&q->bufs[i]->queue);
493                         q->bufs[i]->state = STATE_ERROR;
494                 }
495         }
496         if (q->irqlock)
497                 spin_unlock_irqrestore(q->irqlock,flags);
498
499         /* free all buffers + clear queue */
500         for (i = 0; i < VIDEO_MAX_FRAME; i++) {
501                 if (NULL == q->bufs[i])
502                         continue;
503                 q->ops->buf_release(q,q->bufs[i]);
504         }
505         INIT_LIST_HEAD(&q->stream);
506 }
507
508 /* --------------------------------------------------------------------- */
509
510 enum v4l2_field
511 videobuf_next_field(struct videobuf_queue *q)
512 {
513         enum v4l2_field field = q->field;
514
515         BUG_ON(V4L2_FIELD_ANY == field);
516
517         if (V4L2_FIELD_ALTERNATE == field) {
518                 if (V4L2_FIELD_TOP == q->last) {
519                         field   = V4L2_FIELD_BOTTOM;
520                         q->last = V4L2_FIELD_BOTTOM;
521                 } else {
522                         field   = V4L2_FIELD_TOP;
523                         q->last = V4L2_FIELD_TOP;
524                 }
525         }
526         return field;
527 }
528
529 void
530 videobuf_status(struct v4l2_buffer *b, struct videobuf_buffer *vb,
531                 enum v4l2_buf_type type)
532 {
533         MAGIC_CHECK(vb->magic,MAGIC_BUFFER);
534
535         b->index    = vb->i;
536         b->type     = type;
537
538         b->memory   = vb->memory;
539         switch (b->memory) {
540         case V4L2_MEMORY_MMAP:
541                 b->m.offset  = vb->boff;
542                 b->length    = vb->bsize;
543                 break;
544         case V4L2_MEMORY_USERPTR:
545                 b->m.userptr = vb->baddr;
546                 b->length    = vb->bsize;
547                 break;
548         case V4L2_MEMORY_OVERLAY:
549                 b->m.offset  = vb->boff;
550                 break;
551         }
552
553         b->flags    = 0;
554         if (vb->map)
555                 b->flags |= V4L2_BUF_FLAG_MAPPED;
556
557         switch (vb->state) {
558         case STATE_PREPARED:
559         case STATE_QUEUED:
560         case STATE_ACTIVE:
561                 b->flags |= V4L2_BUF_FLAG_QUEUED;
562                 break;
563         case STATE_DONE:
564         case STATE_ERROR:
565                 b->flags |= V4L2_BUF_FLAG_DONE;
566                 break;
567         case STATE_NEEDS_INIT:
568         case STATE_IDLE:
569                 /* nothing */
570                 break;
571         }
572
573         if (vb->input != UNSET) {
574                 b->flags |= V4L2_BUF_FLAG_INPUT;
575                 b->input  = vb->input;
576         }
577
578         b->field     = vb->field;
579         b->timestamp = vb->ts;
580         b->bytesused = vb->size;
581         b->sequence  = vb->field_count >> 1;
582 }
583
584 int
585 videobuf_reqbufs(struct videobuf_queue *q,
586                  struct v4l2_requestbuffers *req)
587 {
588         unsigned int size,count;
589         int retval;
590
591         if (req->type != q->type) {
592                 dprintk(1,"reqbufs: queue type invalid\n");
593                 return -EINVAL;
594         }
595         if (req->count < 1) {
596                 dprintk(1,"reqbufs: count invalid (%d)\n",req->count);
597                 return -EINVAL;
598         }
599         if (req->memory != V4L2_MEMORY_MMAP     &&
600             req->memory != V4L2_MEMORY_USERPTR  &&
601             req->memory != V4L2_MEMORY_OVERLAY) {
602                 dprintk(1,"reqbufs: memory type invalid\n");
603                 return -EINVAL;
604         }
605
606         if (q->streaming) {
607                 dprintk(1,"reqbufs: streaming already exists\n");
608                 return -EBUSY;
609         }
610         if (!list_empty(&q->stream)) {
611                 dprintk(1,"reqbufs: stream running\n");
612                 return -EBUSY;
613         }
614
615         mutex_lock(&q->lock);
616         count = req->count;
617         if (count > VIDEO_MAX_FRAME)
618                 count = VIDEO_MAX_FRAME;
619         size = 0;
620         q->ops->buf_setup(q,&count,&size);
621         size = PAGE_ALIGN(size);
622         dprintk(1,"reqbufs: bufs=%d, size=0x%x [%d pages total]\n",
623                 count, size, (count*size)>>PAGE_SHIFT);
624
625         retval = videobuf_mmap_setup(q,count,size,req->memory);
626         if (retval < 0) {
627                 dprintk(1,"reqbufs: mmap setup returned %d\n",retval);
628                 goto done;
629         }
630
631         req->count = count;
632
633  done:
634         mutex_unlock(&q->lock);
635         return retval;
636 }
637
638 int
639 videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b)
640 {
641         if (unlikely(b->type != q->type)) {
642                 dprintk(1,"querybuf: Wrong type.\n");
643                 return -EINVAL;
644         }
645         if (unlikely(b->index < 0 || b->index >= VIDEO_MAX_FRAME)) {
646                 dprintk(1,"querybuf: index out of range.\n");
647                 return -EINVAL;
648         }
649         if (unlikely(NULL == q->bufs[b->index])) {
650                 dprintk(1,"querybuf: buffer is null.\n");
651                 return -EINVAL;
652         }
653         videobuf_status(b,q->bufs[b->index],q->type);
654         return 0;
655 }
656
657 int
658 videobuf_qbuf(struct videobuf_queue *q,
659               struct v4l2_buffer *b)
660 {
661         struct videobuf_buffer *buf;
662         enum v4l2_field field;
663         unsigned long flags=0;
664         int retval;
665
666         mutex_lock(&q->lock);
667         retval = -EBUSY;
668         if (q->reading) {
669                 dprintk(1,"qbuf: Reading running...\n");
670                 goto done;
671         }
672         retval = -EINVAL;
673         if (b->type != q->type) {
674                 dprintk(1,"qbuf: Wrong type.\n");
675                 goto done;
676         }
677         if (b->index < 0 || b->index >= VIDEO_MAX_FRAME) {
678                 dprintk(1,"qbuf: index out of range.\n");
679                 goto done;
680         }
681         buf = q->bufs[b->index];
682         if (NULL == buf) {
683                 dprintk(1,"qbuf: buffer is null.\n");
684                 goto done;
685         }
686         MAGIC_CHECK(buf->magic,MAGIC_BUFFER);
687         if (buf->memory != b->memory) {
688                 dprintk(1,"qbuf: memory type is wrong.\n");
689                 goto done;
690         }
691         if (buf->state == STATE_QUEUED ||
692             buf->state == STATE_ACTIVE) {
693                 dprintk(1,"qbuf: buffer is already queued or active.\n");
694                 goto done;
695         }
696
697         if (b->flags & V4L2_BUF_FLAG_INPUT) {
698                 if (b->input >= q->inputs) {
699                         dprintk(1,"qbuf: wrong input.\n");
700                         goto done;
701                 }
702                 buf->input = b->input;
703         } else {
704                 buf->input = UNSET;
705         }
706
707         switch (b->memory) {
708         case V4L2_MEMORY_MMAP:
709                 if (0 == buf->baddr) {
710                         dprintk(1,"qbuf: mmap requested but buffer addr is zero!\n");
711                         goto done;
712                 }
713                 break;
714         case V4L2_MEMORY_USERPTR:
715                 if (b->length < buf->bsize) {
716                         dprintk(1,"qbuf: buffer length is not enough\n");
717                         goto done;
718                 }
719                 if (STATE_NEEDS_INIT != buf->state && buf->baddr != b->m.userptr)
720                         q->ops->buf_release(q,buf);
721                 buf->baddr = b->m.userptr;
722                 break;
723         case V4L2_MEMORY_OVERLAY:
724                 buf->boff = b->m.offset;
725                 break;
726         default:
727                 dprintk(1,"qbuf: wrong memory type\n");
728                 goto done;
729         }
730
731         dprintk(1,"qbuf: requesting next field\n");
732         field = videobuf_next_field(q);
733         retval = q->ops->buf_prepare(q,buf,field);
734         if (0 != retval) {
735                 dprintk(1,"qbuf: buffer_prepare returned %d\n",retval);
736                 goto done;
737         }
738
739         list_add_tail(&buf->stream,&q->stream);
740         if (q->streaming) {
741                 if (q->irqlock)
742                         spin_lock_irqsave(q->irqlock,flags);
743                 q->ops->buf_queue(q,buf);
744                 if (q->irqlock)
745                         spin_unlock_irqrestore(q->irqlock,flags);
746         }
747         dprintk(1,"qbuf: succeded\n");
748         retval = 0;
749
750  done:
751         mutex_unlock(&q->lock);
752         return retval;
753 }
754
755 int
756 videobuf_dqbuf(struct videobuf_queue *q,
757                struct v4l2_buffer *b, int nonblocking)
758 {
759         struct videobuf_buffer *buf;
760         int retval;
761
762         mutex_lock(&q->lock);
763         retval = -EBUSY;
764         if (q->reading) {
765                 dprintk(1,"dqbuf: Reading running...\n");
766                 goto done;
767         }
768         retval = -EINVAL;
769         if (b->type != q->type) {
770                 dprintk(1,"dqbuf: Wrong type.\n");
771                 goto done;
772         }
773         if (list_empty(&q->stream)) {
774                 dprintk(1,"dqbuf: stream running\n");
775                 goto done;
776         }
777         buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
778         retval = videobuf_waiton(buf, nonblocking, 1);
779         if (retval < 0) {
780                 dprintk(1,"dqbuf: waiton returned %d\n",retval);
781                 goto done;
782         }
783         switch (buf->state) {
784         case STATE_ERROR:
785                 dprintk(1,"dqbuf: state is error\n");
786                 retval = -EIO;
787                 videobuf_dma_sync(q,&buf->dma);
788                 buf->state = STATE_IDLE;
789                 break;
790         case STATE_DONE:
791                 dprintk(1,"dqbuf: state is done\n");
792                 videobuf_dma_sync(q,&buf->dma);
793                 buf->state = STATE_IDLE;
794                 break;
795         default:
796                 dprintk(1,"dqbuf: state invalid\n");
797                 retval = -EINVAL;
798                 goto done;
799         }
800         list_del(&buf->stream);
801         memset(b,0,sizeof(*b));
802         videobuf_status(b,buf,q->type);
803
804  done:
805         mutex_unlock(&q->lock);
806         return retval;
807 }
808
809 int videobuf_streamon(struct videobuf_queue *q)
810 {
811         struct videobuf_buffer *buf;
812         struct list_head *list;
813         unsigned long flags=0;
814         int retval;
815
816         mutex_lock(&q->lock);
817         retval = -EBUSY;
818         if (q->reading)
819                 goto done;
820         retval = 0;
821         if (q->streaming)
822                 goto done;
823         q->streaming = 1;
824         if (q->irqlock)
825                 spin_lock_irqsave(q->irqlock,flags);
826         list_for_each(list,&q->stream) {
827                 buf = list_entry(list, struct videobuf_buffer, stream);
828                 if (buf->state == STATE_PREPARED)
829                         q->ops->buf_queue(q,buf);
830         }
831         if (q->irqlock)
832                 spin_unlock_irqrestore(q->irqlock,flags);
833
834  done:
835         mutex_unlock(&q->lock);
836         return retval;
837 }
838
839 int videobuf_streamoff(struct videobuf_queue *q)
840 {
841         int retval = -EINVAL;
842
843         mutex_lock(&q->lock);
844         if (!q->streaming)
845                 goto done;
846         videobuf_queue_cancel(q);
847         q->streaming = 0;
848         retval = 0;
849
850  done:
851         mutex_unlock(&q->lock);
852         return retval;
853 }
854
855 static ssize_t
856 videobuf_read_zerocopy(struct videobuf_queue *q, char __user *data,
857                        size_t count, loff_t *ppos)
858 {
859         enum v4l2_field field;
860         unsigned long flags=0;
861         int retval;
862
863         /* setup stuff */
864         q->read_buf = videobuf_alloc(q->msize);
865         if (NULL == q->read_buf)
866                 return -ENOMEM;
867
868         q->read_buf->memory = V4L2_MEMORY_USERPTR;
869         q->read_buf->baddr  = (unsigned long)data;
870         q->read_buf->bsize  = count;
871         field = videobuf_next_field(q);
872         retval = q->ops->buf_prepare(q,q->read_buf,field);
873         if (0 != retval)
874                 goto done;
875
876         /* start capture & wait */
877         if (q->irqlock)
878                 spin_lock_irqsave(q->irqlock,flags);
879         q->ops->buf_queue(q,q->read_buf);
880         if (q->irqlock)
881                 spin_unlock_irqrestore(q->irqlock,flags);
882         retval = videobuf_waiton(q->read_buf,0,0);
883         if (0 == retval) {
884                 videobuf_dma_sync(q,&q->read_buf->dma);
885                 if (STATE_ERROR == q->read_buf->state)
886                         retval = -EIO;
887                 else
888                         retval = q->read_buf->size;
889         }
890
891  done:
892         /* cleanup */
893         q->ops->buf_release(q,q->read_buf);
894         kfree(q->read_buf);
895         q->read_buf = NULL;
896         return retval;
897 }
898
899 ssize_t videobuf_read_one(struct videobuf_queue *q,
900                           char __user *data, size_t count, loff_t *ppos,
901                           int nonblocking)
902 {
903         enum v4l2_field field;
904         unsigned long flags=0;
905         unsigned size, nbufs, bytes;
906         int retval;
907
908         mutex_lock(&q->lock);
909
910         nbufs = 1; size = 0;
911         q->ops->buf_setup(q,&nbufs,&size);
912         if (NULL == q->read_buf  &&
913             count >= size        &&
914             !nonblocking) {
915                 retval = videobuf_read_zerocopy(q,data,count,ppos);
916                 if (retval >= 0  ||  retval == -EIO)
917                         /* ok, all done */
918                         goto done;
919                 /* fallback to kernel bounce buffer on failures */
920         }
921
922         if (NULL == q->read_buf) {
923                 /* need to capture a new frame */
924                 retval = -ENOMEM;
925                 q->read_buf = videobuf_alloc(q->msize);
926                 dprintk(1,"video alloc=0x%08x\n",(unsigned int) q->read_buf);
927                 if (NULL == q->read_buf)
928                         goto done;
929                 q->read_buf->memory = V4L2_MEMORY_USERPTR;
930                 q->read_buf->bsize = count; /* preferred size */
931                 field = videobuf_next_field(q);
932                 retval = q->ops->buf_prepare(q,q->read_buf,field);
933                 if (0 != retval) {
934                         kfree (q->read_buf);
935                         q->read_buf = NULL;
936                         goto done;
937                 }
938                 if (q->irqlock)
939                         spin_lock_irqsave(q->irqlock,flags);
940                 q->ops->buf_queue(q,q->read_buf);
941                 if (q->irqlock)
942                         spin_unlock_irqrestore(q->irqlock,flags);
943                 q->read_off = 0;
944         }
945
946         /* wait until capture is done */
947         retval = videobuf_waiton(q->read_buf, nonblocking, 1);
948         if (0 != retval)
949                 goto done;
950         videobuf_dma_sync(q,&q->read_buf->dma);
951
952         if (STATE_ERROR == q->read_buf->state) {
953                 /* catch I/O errors */
954                 q->ops->buf_release(q,q->read_buf);
955                 kfree(q->read_buf);
956                 q->read_buf = NULL;
957                 retval = -EIO;
958                 goto done;
959         }
960
961         /* copy to userspace */
962         bytes = count;
963         if (bytes > q->read_buf->size - q->read_off)
964                 bytes = q->read_buf->size - q->read_off;
965         retval = -EFAULT;
966         if (copy_to_user(data, q->read_buf->dma.vmalloc+q->read_off, bytes))
967                 goto done;
968
969         retval = bytes;
970         q->read_off += bytes;
971         if (q->read_off == q->read_buf->size) {
972                 /* all data copied, cleanup */
973                 q->ops->buf_release(q,q->read_buf);
974                 kfree(q->read_buf);
975                 q->read_buf = NULL;
976         }
977
978  done:
979         mutex_unlock(&q->lock);
980         return retval;
981 }
982
983 int videobuf_read_start(struct videobuf_queue *q)
984 {
985         enum v4l2_field field;
986         unsigned long flags=0;
987         int count = 0, size = 0;
988         int err, i;
989
990         q->ops->buf_setup(q,&count,&size);
991         if (count < 2)
992                 count = 2;
993         if (count > VIDEO_MAX_FRAME)
994                 count = VIDEO_MAX_FRAME;
995         size = PAGE_ALIGN(size);
996
997         err = videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR);
998         if (err)
999                 return err;
1000         for (i = 0; i < count; i++) {
1001                 field = videobuf_next_field(q);
1002                 err = q->ops->buf_prepare(q,q->bufs[i],field);
1003                 if (err)
1004                         return err;
1005                 list_add_tail(&q->bufs[i]->stream, &q->stream);
1006         }
1007         if (q->irqlock)
1008                 spin_lock_irqsave(q->irqlock,flags);
1009         for (i = 0; i < count; i++)
1010                 q->ops->buf_queue(q,q->bufs[i]);
1011         if (q->irqlock)
1012                 spin_unlock_irqrestore(q->irqlock,flags);
1013         q->reading = 1;
1014         return 0;
1015 }
1016
1017 void videobuf_read_stop(struct videobuf_queue *q)
1018 {
1019         int i;
1020
1021         videobuf_queue_cancel(q);
1022         videobuf_mmap_free(q);
1023         INIT_LIST_HEAD(&q->stream);
1024         for (i = 0; i < VIDEO_MAX_FRAME; i++) {
1025                 if (NULL == q->bufs[i])
1026                         continue;
1027                 kfree(q->bufs[i]);
1028                 q->bufs[i] = NULL;
1029         }
1030         q->read_buf = NULL;
1031         q->reading  = 0;
1032 }
1033
1034 ssize_t videobuf_read_stream(struct videobuf_queue *q,
1035                              char __user *data, size_t count, loff_t *ppos,
1036                              int vbihack, int nonblocking)
1037 {
1038         unsigned int *fc, bytes;
1039         int err, retval;
1040         unsigned long flags=0;
1041
1042         dprintk(2,"%s\n",__FUNCTION__);
1043         mutex_lock(&q->lock);
1044         retval = -EBUSY;
1045         if (q->streaming)
1046                 goto done;
1047         if (!q->reading) {
1048                 retval = videobuf_read_start(q);
1049                 if (retval < 0)
1050                         goto done;
1051         }
1052
1053         retval = 0;
1054         while (count > 0) {
1055                 /* get / wait for data */
1056                 if (NULL == q->read_buf) {
1057                         q->read_buf = list_entry(q->stream.next,
1058                                                  struct videobuf_buffer,
1059                                                  stream);
1060                         list_del(&q->read_buf->stream);
1061                         q->read_off = 0;
1062                 }
1063                 err = videobuf_waiton(q->read_buf, nonblocking, 1);
1064                 if (err < 0) {
1065                         if (0 == retval)
1066                                 retval = err;
1067                         break;
1068                 }
1069
1070                 if (q->read_buf->state == STATE_DONE) {
1071                         if (vbihack) {
1072                                 /* dirty, undocumented hack -- pass the frame counter
1073                                  * within the last four bytes of each vbi data block.
1074                                  * We need that one to maintain backward compatibility
1075                                  * to all vbi decoding software out there ... */
1076                                 fc  = (unsigned int*)q->read_buf->dma.vmalloc;
1077                                 fc += (q->read_buf->size>>2) -1;
1078                                 *fc = q->read_buf->field_count >> 1;
1079                                 dprintk(1,"vbihack: %d\n",*fc);
1080                         }
1081
1082                         /* copy stuff */
1083                         bytes = count;
1084                         if (bytes > q->read_buf->size - q->read_off)
1085                                 bytes = q->read_buf->size - q->read_off;
1086                         if (copy_to_user(data + retval,
1087                                          q->read_buf->dma.vmalloc + q->read_off,
1088                                          bytes)) {
1089                                 if (0 == retval)
1090                                         retval = -EFAULT;
1091                                 break;
1092                         }
1093                         count       -= bytes;
1094                         retval      += bytes;
1095                         q->read_off += bytes;
1096                 } else {
1097                         /* some error */
1098                         q->read_off = q->read_buf->size;
1099                         if (0 == retval)
1100                                 retval = -EIO;
1101                 }
1102
1103                 /* requeue buffer when done with copying */
1104                 if (q->read_off == q->read_buf->size) {
1105                         list_add_tail(&q->read_buf->stream,
1106                                       &q->stream);
1107                         if (q->irqlock)
1108                                 spin_lock_irqsave(q->irqlock,flags);
1109                         q->ops->buf_queue(q,q->read_buf);
1110                         if (q->irqlock)
1111                                 spin_unlock_irqrestore(q->irqlock,flags);
1112                         q->read_buf = NULL;
1113                 }
1114                 if (retval < 0)
1115                         break;
1116         }
1117
1118  done:
1119         mutex_unlock(&q->lock);
1120         return retval;
1121 }
1122
1123 unsigned int videobuf_poll_stream(struct file *file,
1124                                   struct videobuf_queue *q,
1125                                   poll_table *wait)
1126 {
1127         struct videobuf_buffer *buf = NULL;
1128         unsigned int rc = 0;
1129
1130         mutex_lock(&q->lock);
1131         if (q->streaming) {
1132                 if (!list_empty(&q->stream))
1133                         buf = list_entry(q->stream.next,
1134                                          struct videobuf_buffer, stream);
1135         } else {
1136                 if (!q->reading)
1137                         videobuf_read_start(q);
1138                 if (!q->reading) {
1139                         rc = POLLERR;
1140                 } else if (NULL == q->read_buf) {
1141                         q->read_buf = list_entry(q->stream.next,
1142                                                  struct videobuf_buffer,
1143                                                  stream);
1144                         list_del(&q->read_buf->stream);
1145                         q->read_off = 0;
1146                 }
1147                 buf = q->read_buf;
1148         }
1149         if (!buf)
1150                 rc = POLLERR;
1151
1152         if (0 == rc) {
1153                 poll_wait(file, &buf->done, wait);
1154                 if (buf->state == STATE_DONE ||
1155                     buf->state == STATE_ERROR)
1156                         rc = POLLIN|POLLRDNORM;
1157         }
1158         mutex_unlock(&q->lock);
1159         return rc;
1160 }
1161
1162 /* --------------------------------------------------------------------- */
1163
1164 static void
1165 videobuf_vm_open(struct vm_area_struct *vma)
1166 {
1167         struct videobuf_mapping *map = vma->vm_private_data;
1168
1169         dprintk(2,"vm_open %p [count=%d,vma=%08lx-%08lx]\n",map,
1170                 map->count,vma->vm_start,vma->vm_end);
1171         map->count++;
1172 }
1173
1174 static void
1175 videobuf_vm_close(struct vm_area_struct *vma)
1176 {
1177         struct videobuf_mapping *map = vma->vm_private_data;
1178         struct videobuf_queue *q = map->q;
1179         int i;
1180
1181         dprintk(2,"vm_close %p [count=%d,vma=%08lx-%08lx]\n",map,
1182                 map->count,vma->vm_start,vma->vm_end);
1183
1184         map->count--;
1185         if (0 == map->count) {
1186                 dprintk(1,"munmap %p q=%p\n",map,q);
1187                 mutex_lock(&q->lock);
1188                 for (i = 0; i < VIDEO_MAX_FRAME; i++) {
1189                         if (NULL == q->bufs[i])
1190                                 continue;
1191                         if (q->bufs[i])
1192                                 ;
1193                         if (q->bufs[i]->map != map)
1194                                 continue;
1195                         q->bufs[i]->map   = NULL;
1196                         q->bufs[i]->baddr = 0;
1197                         q->ops->buf_release(q,q->bufs[i]);
1198                 }
1199                 mutex_unlock(&q->lock);
1200                 kfree(map);
1201         }
1202         return;
1203 }
1204
1205 /*
1206  * Get a anonymous page for the mapping.  Make sure we can DMA to that
1207  * memory location with 32bit PCI devices (i.e. don't use highmem for
1208  * now ...).  Bounce buffers don't work very well for the data rates
1209  * video capture has.
1210  */
1211 static struct page*
1212 videobuf_vm_nopage(struct vm_area_struct *vma, unsigned long vaddr,
1213                    int *type)
1214 {
1215         struct page *page;
1216
1217         dprintk(3,"nopage: fault @ %08lx [vma %08lx-%08lx]\n",
1218                 vaddr,vma->vm_start,vma->vm_end);
1219         if (vaddr > vma->vm_end)
1220                 return NOPAGE_SIGBUS;
1221         page = alloc_page(GFP_USER);
1222         if (!page)
1223                 return NOPAGE_OOM;
1224         clear_user_page(page_address(page), vaddr, page);
1225         if (type)
1226                 *type = VM_FAULT_MINOR;
1227         return page;
1228 }
1229
1230 static struct vm_operations_struct videobuf_vm_ops =
1231 {
1232         .open     = videobuf_vm_open,
1233         .close    = videobuf_vm_close,
1234         .nopage   = videobuf_vm_nopage,
1235 };
1236
1237 int videobuf_mmap_setup(struct videobuf_queue *q,
1238                         unsigned int bcount, unsigned int bsize,
1239                         enum v4l2_memory memory)
1240 {
1241         unsigned int i;
1242         int err;
1243
1244         err = videobuf_mmap_free(q);
1245         if (0 != err)
1246                 return err;
1247
1248         for (i = 0; i < bcount; i++) {
1249                 q->bufs[i] = videobuf_alloc(q->msize);
1250                 q->bufs[i]->i      = i;
1251                 q->bufs[i]->input  = UNSET;
1252                 q->bufs[i]->memory = memory;
1253                 q->bufs[i]->bsize  = bsize;
1254                 switch (memory) {
1255                 case V4L2_MEMORY_MMAP:
1256                         q->bufs[i]->boff  = bsize * i;
1257                         break;
1258                 case V4L2_MEMORY_USERPTR:
1259                 case V4L2_MEMORY_OVERLAY:
1260                         /* nothing */
1261                         break;
1262                 }
1263         }
1264         dprintk(1,"mmap setup: %d buffers, %d bytes each\n",
1265                 bcount,bsize);
1266         return 0;
1267 }
1268
1269 int videobuf_mmap_free(struct videobuf_queue *q)
1270 {
1271         int i;
1272
1273         for (i = 0; i < VIDEO_MAX_FRAME; i++)
1274                 if (q->bufs[i] && q->bufs[i]->map)
1275                         return -EBUSY;
1276         for (i = 0; i < VIDEO_MAX_FRAME; i++) {
1277                 if (NULL == q->bufs[i])
1278                         continue;
1279                 q->ops->buf_release(q,q->bufs[i]);
1280                 kfree(q->bufs[i]);
1281                 q->bufs[i] = NULL;
1282         }
1283         return 0;
1284 }
1285
1286 int videobuf_mmap_mapper(struct videobuf_queue *q,
1287                          struct vm_area_struct *vma)
1288 {
1289         struct videobuf_mapping *map;
1290         unsigned int first,last,size,i;
1291         int retval;
1292
1293         mutex_lock(&q->lock);
1294         retval = -EINVAL;
1295         if (!(vma->vm_flags & VM_WRITE)) {
1296                 dprintk(1,"mmap app bug: PROT_WRITE please\n");
1297                 goto done;
1298         }
1299         if (!(vma->vm_flags & VM_SHARED)) {
1300                 dprintk(1,"mmap app bug: MAP_SHARED please\n");
1301                 goto done;
1302         }
1303
1304         /* look for first buffer to map */
1305         for (first = 0; first < VIDEO_MAX_FRAME; first++) {
1306                 if (NULL == q->bufs[first])
1307                         continue;
1308                 if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
1309                         continue;
1310                 if (q->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT))
1311                         break;
1312         }
1313         if (VIDEO_MAX_FRAME == first) {
1314                 dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n",
1315                         (vma->vm_pgoff << PAGE_SHIFT));
1316                 goto done;
1317         }
1318
1319         /* look for last buffer to map */
1320         for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) {
1321                 if (NULL == q->bufs[last])
1322                         continue;
1323                 if (V4L2_MEMORY_MMAP != q->bufs[last]->memory)
1324                         continue;
1325                 if (q->bufs[last]->map) {
1326                         retval = -EBUSY;
1327                         goto done;
1328                 }
1329                 size += q->bufs[last]->bsize;
1330                 if (size == (vma->vm_end - vma->vm_start))
1331                         break;
1332         }
1333         if (VIDEO_MAX_FRAME == last) {
1334                 dprintk(1,"mmap app bug: size invalid [size=0x%lx]\n",
1335                         (vma->vm_end - vma->vm_start));
1336                 goto done;
1337         }
1338
1339         /* create mapping + update buffer list */
1340         retval = -ENOMEM;
1341         map = kmalloc(sizeof(struct videobuf_mapping),GFP_KERNEL);
1342         if (NULL == map)
1343                 goto done;
1344         for (size = 0, i = first; i <= last; size += q->bufs[i++]->bsize) {
1345                 q->bufs[i]->map   = map;
1346                 q->bufs[i]->baddr = vma->vm_start + size;
1347         }
1348         map->count    = 1;
1349         map->start    = vma->vm_start;
1350         map->end      = vma->vm_end;
1351         map->q        = q;
1352         vma->vm_ops   = &videobuf_vm_ops;
1353         vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
1354         vma->vm_flags &= ~VM_IO; /* using shared anonymous pages */
1355         vma->vm_private_data = map;
1356         dprintk(1,"mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n",
1357                 map,q,vma->vm_start,vma->vm_end,vma->vm_pgoff,first,last);
1358         retval = 0;
1359
1360  done:
1361         mutex_unlock(&q->lock);
1362         return retval;
1363 }
1364
1365 /* --------------------------------------------------------------------- */
1366
1367 EXPORT_SYMBOL_GPL(videobuf_vmalloc_to_sg);
1368
1369 EXPORT_SYMBOL_GPL(videobuf_dma_init);
1370 EXPORT_SYMBOL_GPL(videobuf_dma_init_user);
1371 EXPORT_SYMBOL_GPL(videobuf_dma_init_kernel);
1372 EXPORT_SYMBOL_GPL(videobuf_dma_init_overlay);
1373 EXPORT_SYMBOL_GPL(videobuf_dma_map);
1374 EXPORT_SYMBOL_GPL(videobuf_dma_sync);
1375 EXPORT_SYMBOL_GPL(videobuf_dma_unmap);
1376 EXPORT_SYMBOL_GPL(videobuf_dma_free);
1377
1378 EXPORT_SYMBOL_GPL(videobuf_pci_dma_map);
1379 EXPORT_SYMBOL_GPL(videobuf_pci_dma_unmap);
1380
1381 EXPORT_SYMBOL_GPL(videobuf_alloc);
1382 EXPORT_SYMBOL_GPL(videobuf_waiton);
1383 EXPORT_SYMBOL_GPL(videobuf_iolock);
1384
1385 EXPORT_SYMBOL_GPL(videobuf_queue_init);
1386 EXPORT_SYMBOL_GPL(videobuf_queue_cancel);
1387 EXPORT_SYMBOL_GPL(videobuf_queue_is_busy);
1388
1389 EXPORT_SYMBOL_GPL(videobuf_next_field);
1390 EXPORT_SYMBOL_GPL(videobuf_status);
1391 EXPORT_SYMBOL_GPL(videobuf_reqbufs);
1392 EXPORT_SYMBOL_GPL(videobuf_querybuf);
1393 EXPORT_SYMBOL_GPL(videobuf_qbuf);
1394 EXPORT_SYMBOL_GPL(videobuf_dqbuf);
1395 EXPORT_SYMBOL_GPL(videobuf_streamon);
1396 EXPORT_SYMBOL_GPL(videobuf_streamoff);
1397
1398 EXPORT_SYMBOL_GPL(videobuf_read_start);
1399 EXPORT_SYMBOL_GPL(videobuf_read_stop);
1400 EXPORT_SYMBOL_GPL(videobuf_read_stream);
1401 EXPORT_SYMBOL_GPL(videobuf_read_one);
1402 EXPORT_SYMBOL_GPL(videobuf_poll_stream);
1403
1404 EXPORT_SYMBOL_GPL(videobuf_mmap_setup);
1405 EXPORT_SYMBOL_GPL(videobuf_mmap_free);
1406 EXPORT_SYMBOL_GPL(videobuf_mmap_mapper);
1407
1408 /*
1409  * Local variables:
1410  * c-basic-offset: 8
1411  * End:
1412  */