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; }
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; }
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; }