Ejemplos de videobuf_pages_to_sg en C++ (Cpp)

Ejemplo n.º 1

Archivo: video-buf.c Proyecto: BackupTheBerlios/tuxap

int videobuf_dma_pci_map(struct pci_dev *dev, struct videobuf_dmabuf *dma)
{
	MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
	BUG_ON(0 == dma->nr_pages);
	
	if (dma->pages) {
		dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages,
						   dma->offset);
	}
	if (dma->vmalloc) {
		dma->sglist = videobuf_vmalloc_to_sg
			(dma->vmalloc,dma->nr_pages);
	}
	if (dma->bus_addr) {
		dma->sglist = kmalloc(sizeof(struct scatterlist), GFP_KERNEL);
		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;
		}
	}
	if (NULL == dma->sglist) {
		dprintk(1,"scatterlist is NULL\n");
		return -ENOMEM;
	}

	if (!dma->bus_addr)
		dma->sglen = pci_map_sg(dev,dma->sglist,dma->nr_pages,
					dma->direction);
	return 0;
}

Ejemplo n.º 2

Archivo: video-buf.c Proyecto: FatSunHYS/OSCourseDesign

int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma)
{
	void                   *dev=q->dev;

	MAGIC_CHECK(dma->magic,MAGIC_DMABUF);
	BUG_ON(0 == dma->nr_pages);

	if (dma->pages) {
		dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages,
						   dma->offset);
	}
	if (dma->vmalloc) {
		dma->sglist = videobuf_vmalloc_to_sg
						(dma->vmalloc,dma->nr_pages);
	}
	if (dma->bus_addr) {
		dma->sglist = kmalloc(sizeof(struct scatterlist), GFP_KERNEL);
		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;
		}
	}
	if (NULL == dma->sglist) {
		dprintk(1,"scatterlist is NULL\n");
		return -ENOMEM;
	}
	if (!dma->bus_addr) {
		if (q->ops->vb_map_sg) {
			dma->sglen = q->ops->vb_map_sg(dev,dma->sglist,
					dma->nr_pages, dma->direction);
		}
		if (0 == dma->sglen) {
			printk(KERN_WARNING
			       "%s: videobuf_map_sg failed\n",__FUNCTION__);
			kfree(dma->sglist);
			dma->sglist = NULL;
			dma->sglen = 0;
			return -EIO;
		}
	}
	return 0;
}

Ejemplo n.º 3

Archivo: videobuf-dma-sg.c Proyecto: Aaroneke/galaxy-2636

int videobuf_dma_map(struct device *dev, struct videobuf_dmabuf *dma)
{
	MAGIC_CHECK(dma->magic, MAGIC_DMABUF);
	BUG_ON(0 == dma->nr_pages);

	if (dma->pages) {
		dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages,
						   dma->offset, dma->size);
	}
	if (dma->vaddr) {
		dma->sglist = videobuf_vmalloc_to_sg(dma->vaddr,
						     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;
		}
	}
	if (NULL == dma->sglist) {
		dprintk(1, "scatterlist is NULL\n");
		return -ENOMEM;
	}
	if (!dma->bus_addr) {
		dma->sglen = dma_map_sg(dev, dma->sglist,
					dma->nr_pages, dma->direction);
		if (0 == dma->sglen) {
			printk(KERN_WARNING
			       "%s: videobuf_map_sg failed\n", __func__);
			vfree(dma->sglist);
			dma->sglist = NULL;
			dma->sglen = 0;
			return -ENOMEM;
		}
	}

	return 0;
}