diff options
Diffstat (limited to 'drivers/media/video/videobuf-dma-sg.c')
| -rw-r--r-- | drivers/media/video/videobuf-dma-sg.c | 383 |
1 files changed, 157 insertions, 226 deletions
diff --git a/drivers/media/video/videobuf-dma-sg.c b/drivers/media/video/videobuf-dma-sg.c index fcd045e7a1c1..8359e6badd36 100644 --- a/drivers/media/video/videobuf-dma-sg.c +++ b/drivers/media/video/videobuf-dma-sg.c @@ -37,8 +37,12 @@ #define MAGIC_DMABUF 0x19721112 #define MAGIC_SG_MEM 0x17890714 -#define MAGIC_CHECK(is,should) if (unlikely((is) != (should))) \ - { printk(KERN_ERR "magic mismatch: %x (expected %x)\n",is,should); BUG(); } +#define MAGIC_CHECK(is, should) \ + if (unlikely((is) != (should))) { \ + printk(KERN_ERR "magic mismatch: %x (expected %x)\n", \ + is, should); \ + BUG(); \ + } static int debug; module_param(debug, int, 0644); @@ -47,13 +51,13 @@ MODULE_DESCRIPTION("helper module to manage video4linux dma sg buffers"); MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); MODULE_LICENSE("GPL"); -#define dprintk(level, fmt, arg...) if (debug >= level) \ - printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg) +#define dprintk(level, fmt, arg...) \ + if (debug >= level) \ + printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg) /* --------------------------------------------------------------------- */ -struct scatterlist* -videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages) +struct scatterlist *videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages) { struct scatterlist *sglist; struct page *pg; @@ -73,13 +77,14 @@ videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages) } return sglist; - err: +err: vfree(sglist); return NULL; } +EXPORT_SYMBOL_GPL(videobuf_vmalloc_to_sg); -struct scatterlist* -videobuf_pages_to_sg(struct page **pages, int nr_pages, int offset) +struct scatterlist *videobuf_pages_to_sg(struct page **pages, int nr_pages, + int offset) { struct scatterlist *sglist; int i; @@ -104,20 +109,20 @@ videobuf_pages_to_sg(struct page **pages, int nr_pages, int offset) } return sglist; - nopage: - dprintk(2,"sgl: oops - no page\n"); +nopage: + dprintk(2, "sgl: oops - no page\n"); vfree(sglist); return NULL; - highmem: - dprintk(2,"sgl: oops - highmem page\n"); +highmem: + dprintk(2, "sgl: oops - highmem page\n"); vfree(sglist); return NULL; } /* --------------------------------------------------------------------- */ -struct videobuf_dmabuf *videobuf_to_dma (struct videobuf_buffer *buf) +struct videobuf_dmabuf *videobuf_to_dma(struct videobuf_buffer *buf) { struct videobuf_dma_sg_memory *mem = buf->priv; BUG_ON(!mem); @@ -126,17 +131,19 @@ struct videobuf_dmabuf *videobuf_to_dma (struct videobuf_buffer *buf) return &mem->dma; } +EXPORT_SYMBOL_GPL(videobuf_to_dma); void videobuf_dma_init(struct videobuf_dmabuf *dma) { - memset(dma,0,sizeof(*dma)); + memset(dma, 0, sizeof(*dma)); dma->magic = MAGIC_DMABUF; } +EXPORT_SYMBOL_GPL(videobuf_dma_init); static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, int direction, unsigned long data, unsigned long size) { - unsigned long first,last; + unsigned long first, last; int err, rw = 0; dma->direction = direction; @@ -155,21 +162,21 @@ static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, last = ((data+size-1) & PAGE_MASK) >> PAGE_SHIFT; dma->offset = data & ~PAGE_MASK; dma->nr_pages = last-first+1; - dma->pages = kmalloc(dma->nr_pages * sizeof(struct page*), - GFP_KERNEL); + dma->pages = kmalloc(dma->nr_pages * sizeof(struct page *), GFP_KERNEL); if (NULL == dma->pages) return -ENOMEM; - dprintk(1,"init user [0x%lx+0x%lx => %d pages]\n", - data,size,dma->nr_pages); - err = get_user_pages(current,current->mm, + dprintk(1, "init user [0x%lx+0x%lx => %d pages]\n", + data, size, dma->nr_pages); + + err = get_user_pages(current, current->mm, data & PAGE_MASK, dma->nr_pages, rw == READ, 1, /* force */ dma->pages, NULL); if (err != dma->nr_pages) { dma->nr_pages = (err >= 0) ? err : 0; - dprintk(1,"get_user_pages: err=%d [%d]\n",err,dma->nr_pages); + dprintk(1, "get_user_pages: err=%d [%d]\n", err, dma->nr_pages); return err < 0 ? err : -EINVAL; } return 0; @@ -179,48 +186,58 @@ int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction, unsigned long data, unsigned long size) { int ret; + down_read(¤t->mm->mmap_sem); ret = videobuf_dma_init_user_locked(dma, direction, data, size); up_read(¤t->mm->mmap_sem); return ret; } +EXPORT_SYMBOL_GPL(videobuf_dma_init_user); int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction, int nr_pages) { - dprintk(1,"init kernel [%d pages]\n",nr_pages); + dprintk(1, "init kernel [%d pages]\n", nr_pages); + dma->direction = direction; dma->vmalloc = vmalloc_32(nr_pages << PAGE_SHIFT); if (NULL == dma->vmalloc) { - dprintk(1,"vmalloc_32(%d pages) failed\n",nr_pages); + dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages); return -ENOMEM; } - dprintk(1,"vmalloc is at addr 0x%08lx, size=%d\n", + + dprintk(1, "vmalloc is at addr 0x%08lx, size=%d\n", (unsigned long)dma->vmalloc, nr_pages << PAGE_SHIFT); - memset(dma->vmalloc,0,nr_pages << PAGE_SHIFT); + + memset(dma->vmalloc, 0, nr_pages << PAGE_SHIFT); dma->nr_pages = nr_pages; + return 0; } +EXPORT_SYMBOL_GPL(videobuf_dma_init_kernel); int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction, dma_addr_t addr, int nr_pages) { - dprintk(1,"init overlay [%d pages @ bus 0x%lx]\n", - nr_pages,(unsigned long)addr); + dprintk(1, "init overlay [%d pages @ bus 0x%lx]\n", + nr_pages, (unsigned long)addr); dma->direction = direction; + if (0 == addr) return -EINVAL; dma->bus_addr = addr; dma->nr_pages = nr_pages; + return 0; } +EXPORT_SYMBOL_GPL(videobuf_dma_init_overlay); -int videobuf_dma_map(struct videobuf_queue* q, struct videobuf_dmabuf *dma) +int videobuf_dma_map(struct videobuf_queue *q, struct videobuf_dmabuf *dma) { - MAGIC_CHECK(dma->magic,MAGIC_DMABUF); + MAGIC_CHECK(dma->magic, MAGIC_DMABUF); BUG_ON(0 == dma->nr_pages); if (dma->pages) { @@ -228,20 +245,21 @@ int videobuf_dma_map(struct videobuf_queue* q, struct videobuf_dmabuf *dma) dma->offset); } if (dma->vmalloc) { - dma->sglist = videobuf_vmalloc_to_sg - (dma->vmalloc,dma->nr_pages); + dma->sglist = videobuf_vmalloc_to_sg(dma->vmalloc, + dma->nr_pages); } if (dma->bus_addr) { dma->sglist = vmalloc(sizeof(*dma->sglist)); if (NULL != dma->sglist) { - dma->sglen = 1; - sg_dma_address(&dma->sglist[0]) = dma->bus_addr & PAGE_MASK; - dma->sglist[0].offset = dma->bus_addr & ~PAGE_MASK; - sg_dma_len(&dma->sglist[0]) = dma->nr_pages * PAGE_SIZE; + dma->sglen = 1; + sg_dma_address(&dma->sglist[0]) = dma->bus_addr + & PAGE_MASK; + dma->sglist[0].offset = dma->bus_addr & ~PAGE_MASK; + sg_dma_len(&dma->sglist[0]) = dma->nr_pages * PAGE_SIZE; } } if (NULL == dma->sglist) { - dprintk(1,"scatterlist is NULL\n"); + dprintk(1, "scatterlist is NULL\n"); return -ENOMEM; } if (!dma->bus_addr) { @@ -249,47 +267,43 @@ int videobuf_dma_map(struct videobuf_queue* q, struct videobuf_dmabuf *dma) dma->nr_pages, dma->direction); if (0 == dma->sglen) { printk(KERN_WARNING - "%s: videobuf_map_sg failed\n",__func__); + "%s: videobuf_map_sg failed\n", __func__); vfree(dma->sglist); dma->sglist = NULL; dma->sglen = 0; return -ENOMEM; } } - return 0; -} - -int videobuf_dma_sync(struct videobuf_queue *q, struct videobuf_dmabuf *dma) -{ - MAGIC_CHECK(dma->magic, MAGIC_DMABUF); - BUG_ON(!dma->sglen); - dma_sync_sg_for_cpu(q->dev, dma->sglist, dma->nr_pages, dma->direction); return 0; } +EXPORT_SYMBOL_GPL(videobuf_dma_map); -int videobuf_dma_unmap(struct videobuf_queue* q,struct videobuf_dmabuf *dma) +int videobuf_dma_unmap(struct videobuf_queue *q, struct videobuf_dmabuf *dma) { MAGIC_CHECK(dma->magic, MAGIC_DMABUF); + if (!dma->sglen) return 0; - dma_unmap_sg(q->dev, dma->sglist, dma->nr_pages, dma->direction); + dma_unmap_sg(q->dev, dma->sglist, dma->sglen, dma->direction); vfree(dma->sglist); dma->sglist = NULL; dma->sglen = 0; + return 0; } +EXPORT_SYMBOL_GPL(videobuf_dma_unmap); int videobuf_dma_free(struct videobuf_dmabuf *dma) { - MAGIC_CHECK(dma->magic,MAGIC_DMABUF); + int i; + MAGIC_CHECK(dma->magic, MAGIC_DMABUF); BUG_ON(dma->sglen); if (dma->pages) { - int i; - for (i=0; i < dma->nr_pages; i++) + for (i = 0; i < dma->nr_pages; i++) page_cache_release(dma->pages[i]); kfree(dma->pages); dma->pages = NULL; @@ -298,12 +312,13 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma) vfree(dma->vmalloc); dma->vmalloc = NULL; - if (dma->bus_addr) { + if (dma->bus_addr) dma->bus_addr = 0; - } dma->direction = DMA_NONE; + return 0; } +EXPORT_SYMBOL_GPL(videobuf_dma_free); /* --------------------------------------------------------------------- */ @@ -315,6 +330,7 @@ int videobuf_sg_dma_map(struct device *dev, struct videobuf_dmabuf *dma) return videobuf_dma_map(&q, dma); } +EXPORT_SYMBOL_GPL(videobuf_sg_dma_map); int videobuf_sg_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma) { @@ -324,49 +340,48 @@ int videobuf_sg_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma) return videobuf_dma_unmap(&q, dma); } +EXPORT_SYMBOL_GPL(videobuf_sg_dma_unmap); /* --------------------------------------------------------------------- */ -static void -videobuf_vm_open(struct vm_area_struct *vma) +static void videobuf_vm_open(struct vm_area_struct *vma) { struct videobuf_mapping *map = vma->vm_private_data; - dprintk(2,"vm_open %p [count=%d,vma=%08lx-%08lx]\n",map, - map->count,vma->vm_start,vma->vm_end); + dprintk(2, "vm_open %p [count=%d,vma=%08lx-%08lx]\n", map, + map->count, vma->vm_start, vma->vm_end); + map->count++; } -static void -videobuf_vm_close(struct vm_area_struct *vma) +static void videobuf_vm_close(struct vm_area_struct *vma) { struct videobuf_mapping *map = vma->vm_private_data; struct videobuf_queue *q = map->q; struct videobuf_dma_sg_memory *mem; int i; - dprintk(2,"vm_close %p [count=%d,vma=%08lx-%08lx]\n",map, - map->count,vma->vm_start,vma->vm_end); + dprintk(2, "vm_close %p [count=%d,vma=%08lx-%08lx]\n", map, + map->count, vma->vm_start, vma->vm_end); map->count--; if (0 == map->count) { - dprintk(1,"munmap %p q=%p\n",map,q); + dprintk(1, "munmap %p q=%p\n", map, q); mutex_lock(&q->vb_lock); for (i = 0; i < VIDEO_MAX_FRAME; i++) { if (NULL == q->bufs[i]) continue; - mem=q->bufs[i]->priv; - + mem = q->bufs[i]->priv; if (!mem) continue; - MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); + MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); if (q->bufs[i]->map != map) continue; q->bufs[i]->map = NULL; q->bufs[i]->baddr = 0; - q->ops->buf_release(q,q->bufs[i]); + q->ops->buf_release(q, q->bufs[i]); } mutex_unlock(&q->vb_lock); kfree(map); @@ -380,26 +395,27 @@ videobuf_vm_close(struct vm_area_struct *vma) * now ...). Bounce buffers don't work very well for the data rates * video capture has. */ -static int -videobuf_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +static int videobuf_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct page *page; - dprintk(3,"fault: fault @ %08lx [vma %08lx-%08lx]\n", - (unsigned long)vmf->virtual_address,vma->vm_start,vma->vm_end); + dprintk(3, "fault: fault @ %08lx [vma %08lx-%08lx]\n", + (unsigned long)vmf->virtual_address, + vma->vm_start, vma->vm_end); + page = alloc_page(GFP_USER | __GFP_DMA32); if (!page) return VM_FAULT_OOM; clear_user_highpage(page, (unsigned long)vmf->virtual_address); vmf->page = page; + return 0; } -static const struct vm_operations_struct videobuf_vm_ops = -{ - .open = videobuf_vm_open, - .close = videobuf_vm_close, - .fault = videobuf_vm_fault, +static const struct vm_operations_struct videobuf_vm_ops = { + .open = videobuf_vm_open, + .close = videobuf_vm_close, + .fault = videobuf_vm_fault, }; /* --------------------------------------------------------------------- @@ -412,28 +428,28 @@ static const struct vm_operations_struct videobuf_vm_ops = struct videobuf_dma_sg_memory */ -static void *__videobuf_alloc(size_t size) +static struct videobuf_buffer *__videobuf_alloc(size_t size) { struct videobuf_dma_sg_memory *mem; struct videobuf_buffer *vb; - vb = kzalloc(size+sizeof(*mem),GFP_KERNEL); + vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); if (!vb) return vb; - mem = vb->priv = ((char *)vb)+size; - mem->magic=MAGIC_SG_MEM; + mem = vb->priv = ((char *)vb) + size; + mem->magic = MAGIC_SG_MEM; videobuf_dma_init(&mem->dma); - dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n", - __func__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb), - mem,(long)sizeof(*mem)); + dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n", + __func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb), + mem, (long)sizeof(*mem)); return vb; } -static void *__videobuf_to_vmalloc (struct videobuf_buffer *buf) +static void *__videobuf_to_vaddr(struct videobuf_buffer *buf) { struct videobuf_dma_sg_memory *mem = buf->priv; BUG_ON(!mem); @@ -443,11 +459,11 @@ static void *__videobuf_to_vmalloc (struct videobuf_buffer *buf) return mem->dma.vmalloc; } -static int __videobuf_iolock (struct videobuf_queue* q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) +static int __videobuf_iolock(struct videobuf_queue *q, + struct videobuf_buffer *vb, + struct v4l2_framebuffer *fbuf) { - int err,pages; + int err, pages; dma_addr_t bus; struct videobuf_dma_sg_memory *mem = vb->priv; BUG_ON(!mem); @@ -460,16 +476,16 @@ static int __videobuf_iolock (struct videobuf_queue* q, if (0 == vb->baddr) { /* no userspace addr -- kernel bounce buffer */ pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT; - err = videobuf_dma_init_kernel( &mem->dma, - DMA_FROM_DEVICE, - pages ); + err = videobuf_dma_init_kernel(&mem->dma, + DMA_FROM_DEVICE, + pages); if (0 != err) return err; } else if (vb->memory == V4L2_MEMORY_USERPTR) { /* dma directly to userspace */ - err = videobuf_dma_init_user( &mem->dma, - DMA_FROM_DEVICE, - vb->baddr,vb->bsize ); + err = videobuf_dma_init_user(&mem->dma, + DMA_FROM_DEVICE, + vb->baddr, vb->bsize); if (0 != err) return err; } else { @@ -515,43 +531,27 @@ static int __videobuf_sync(struct videobuf_queue *q, struct videobuf_buffer *buf) { struct videobuf_dma_sg_memory *mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); + BUG_ON(!mem || !mem->dma.sglen); - return videobuf_dma_sync(q,&mem->dma); -} - -static int __videobuf_mmap_free(struct videobuf_queue *q) -{ - int i; + MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); + MAGIC_CHECK(mem->dma.magic, MAGIC_DMABUF); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (q->bufs[i]) { - if (q->bufs[i]->map) - return -EBUSY; - } - } + dma_sync_sg_for_cpu(q->dev, mem->dma.sglist, + mem->dma.sglen, mem->dma.direction); return 0; } static int __videobuf_mmap_mapper(struct videobuf_queue *q, - struct vm_area_struct *vma) + struct videobuf_buffer *buf, + struct vm_area_struct *vma) { - struct videobuf_dma_sg_memory *mem; + struct videobuf_dma_sg_memory *mem = buf->priv; struct videobuf_mapping *map; - unsigned int first,last,size,i; + unsigned int first, last, size = 0, i; int retval; retval = -EINVAL; - if (!(vma->vm_flags & VM_WRITE)) { - dprintk(1,"mmap app bug: PROT_WRITE please\n"); - goto done; - } - if (!(vma->vm_flags & VM_SHARED)) { - dprintk(1,"mmap app bug: MAP_SHARED please\n"); - goto done; - } /* This function maintains backwards compatibility with V4L1 and will * map more than one buffer if the vma length is equal to the combined @@ -561,48 +561,52 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, * TODO: Allow drivers to specify if they support this mode */ + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); + /* look for first buffer to map */ for (first = 0; first < VIDEO_MAX_FRAME; first++) { - if (NULL == q->bufs[first]) - continue; - mem=q->bufs[first]->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); - - if (V4L2_MEMORY_MMAP != q->bufs[first]->memory) - continue; - if (q->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT)) + if (buf == q->bufs[first]) { + size = PAGE_ALIGN(q->bufs[first]->bsize); break; + } } - if (VIDEO_MAX_FRAME == first) { - dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n", - (vma->vm_pgoff << PAGE_SHIFT)); + + /* paranoia, should never happen since buf is always valid. */ + if (!size) { + dprintk(1, "mmap app bug: offset invalid [offset=0x%lx]\n", + (vma->vm_pgoff << PAGE_SHIFT)); goto done; } - /* look for last buffer to map */ - for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) { - if (NULL == q->bufs[last]) - continue; - if (V4L2_MEMORY_MMAP != q->bufs[last]->memory) - continue; - if (q->bufs[last]->map) { - retval = -EBUSY; + last = first; +#ifdef CONFIG_VIDEO_V4L1_COMPAT + if (size != (vma->vm_end - vma->vm_start)) { + /* look for last buffer to map */ + for (last = first + 1; last < VIDEO_MAX_FRAME; last++) { + if (NULL == q->bufs[last]) + continue; + if (V4L2_MEMORY_MMAP != q->bufs[last]->memory) + continue; + if (q->bufs[last]->map) { + retval = -EBUSY; + goto done; + } + size += PAGE_ALIGN(q->bufs[last]->bsize); + if (size == (vma->vm_end - vma->vm_start)) + break; + } + if (VIDEO_MAX_FRAME == last) { + dprintk(1, "mmap app bug: size invalid [size=0x%lx]\n", + (vma->vm_end - vma->vm_start)); goto done; } - size += PAGE_ALIGN(q->bufs[last]->bsize); - if (size == (vma->vm_end - vma->vm_start)) - break; - } - if (VIDEO_MAX_FRAME == last) { - dprintk(1,"mmap app bug: size invalid [size=0x%lx]\n", - (vma->vm_end - vma->vm_start)); - goto done; } +#endif /* create mapping + update buffer list */ retval = -ENOMEM; - map = kmalloc(sizeof(struct videobuf_mapping),GFP_KERNEL); + map = kmalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); if (NULL == map) goto done; @@ -623,72 +627,22 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED; vma->vm_flags &= ~VM_IO; /* using shared anonymous pages */ vma->vm_private_data = map; - dprintk(1,"mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n", - map,q,vma->vm_start,vma->vm_end,vma->vm_pgoff,first,last); + dprintk(1, "mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n", + map, q, vma->vm_start, vma->vm_end, vma->vm_pgoff, first, last); retval = 0; - done: +done: return retval; } -static int __videobuf_copy_to_user ( struct videobuf_queue *q, - char __user *data, size_t count, - int nonblocking ) -{ - struct videobuf_dma_sg_memory *mem = q->read_buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); - - /* copy to userspace */ - if (count > q->read_buf->size - q->read_off) - count = q->read_buf->size - q->read_off; - - if (copy_to_user(data, mem->dma.vmalloc+q->read_off, count)) - return -EFAULT; - - return count; -} - -static int __videobuf_copy_stream ( struct videobuf_queue *q, - char __user *data, size_t count, size_t pos, - int vbihack, int nonblocking ) -{ - unsigned int *fc; - struct videobuf_dma_sg_memory *mem = q->read_buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); - - if (vbihack) { - /* dirty, undocumented hack -- pass the frame counter - * within the last four bytes of each vbi data block. - * We need that one to maintain backward compatibility - * to all vbi decoding software out there ... */ - fc = (unsigned int*)mem->dma.vmalloc; - fc += (q->read_buf->size>>2) -1; - *fc = q->read_buf->field_count >> 1; - dprintk(1,"vbihack: %d\n",*fc); - } - - /* copy stuff using the common method */ - count = __videobuf_copy_to_user (q,data,count,nonblocking); - - if ( (count==-EFAULT) && (0 == pos) ) - return -EFAULT; - - return count; -} - static struct videobuf_qtype_ops sg_ops = { .magic = MAGIC_QTYPE_OPS, .alloc = __videobuf_alloc, .iolock = __videobuf_iolock, .sync = __videobuf_sync, - .mmap_free = __videobuf_mmap_free, .mmap_mapper = __videobuf_mmap_mapper, - .video_copy_to_user = __videobuf_copy_to_user, - .copy_stream = __videobuf_copy_stream, - .vmalloc = __videobuf_to_vmalloc, + .vaddr = __videobuf_to_vaddr, }; void *videobuf_sg_alloc(size_t size) @@ -702,8 +656,9 @@ void *videobuf_sg_alloc(size_t size) return videobuf_alloc(&q); } +EXPORT_SYMBOL_GPL(videobuf_sg_alloc); -void videobuf_queue_sg_init(struct videobuf_queue* q, +void videobuf_queue_sg_init(struct videobuf_queue *q, const struct videobuf_queue_ops *ops, struct device *dev, spinlock_t *irqlock, @@ -715,29 +670,5 @@ void videobuf_queue_sg_init(struct videobuf_queue* q, videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, priv, &sg_ops); } - -/* --------------------------------------------------------------------- */ - -EXPORT_SYMBOL_GPL(videobuf_vmalloc_to_sg); - -EXPORT_SYMBOL_GPL(videobuf_to_dma); -EXPORT_SYMBOL_GPL(videobuf_dma_init); -EXPORT_SYMBOL_GPL(videobuf_dma_init_user); -EXPORT_SYMBOL_GPL(videobuf_dma_init_kernel); -EXPORT_SYMBOL_GPL(videobuf_dma_init_overlay); -EXPORT_SYMBOL_GPL(videobuf_dma_map); -EXPORT_SYMBOL_GPL(videobuf_dma_sync); -EXPORT_SYMBOL_GPL(videobuf_dma_unmap); -EXPORT_SYMBOL_GPL(videobuf_dma_free); - -EXPORT_SYMBOL_GPL(videobuf_sg_dma_map); -EXPORT_SYMBOL_GPL(videobuf_sg_dma_unmap); -EXPORT_SYMBOL_GPL(videobuf_sg_alloc); - EXPORT_SYMBOL_GPL(videobuf_queue_sg_init); -/* - * Local variables: - * c-basic-offset: 8 - * End: - */ |
