80 void ivtv_udma_alloc(struct ivtv *itv)  in ivtv_udma_alloc()  argument
82 	if (itv->udma.SG_handle == 0) {  in ivtv_udma_alloc()
84 		itv->udma.SG_handle = pci_map_single(itv->pdev, itv->udma.SGarray,  in ivtv_udma_alloc()
85 			   sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);  in ivtv_udma_alloc()
86 		ivtv_udma_sync_for_cpu(itv);  in ivtv_udma_alloc()
90 int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,  in ivtv_udma_setup()  argument
94 	struct ivtv_user_dma *dma = &itv->udma;  in ivtv_udma_setup()
138 	dma->SG_length = pci_map_sg(itv->pdev, dma->SGlist, dma->page_count, PCI_DMA_TODEVICE);  in ivtv_udma_setup()
146 	ivtv_udma_sync_for_device(itv);  in ivtv_udma_setup()
150 void ivtv_udma_unmap(struct ivtv *itv)  in ivtv_udma_unmap()  argument
152 	struct ivtv_user_dma *dma = &itv->udma;  in ivtv_udma_unmap()
162 		pci_unmap_sg(itv->pdev, dma->SGlist, dma->page_count, PCI_DMA_TODEVICE);  in ivtv_udma_unmap()
166 	ivtv_udma_sync_for_cpu(itv);  in ivtv_udma_unmap()
172 void ivtv_udma_free(struct ivtv *itv)  in ivtv_udma_free()  argument
177 	if (itv->udma.SG_handle) {  in ivtv_udma_free()
178 		pci_unmap_single(itv->pdev, itv->udma.SG_handle,  in ivtv_udma_free()
179 			 sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);  in ivtv_udma_free()
183 	if (itv->udma.SG_length) {  in ivtv_udma_free()
184 		pci_unmap_sg(itv->pdev, itv->udma.SGlist, itv->udma.page_count, PCI_DMA_TODEVICE);  in ivtv_udma_free()
188 		if (itv->udma.bouncemap[i])  in ivtv_udma_free()
189 			__free_page(itv->udma.bouncemap[i]);  in ivtv_udma_free()
193 void ivtv_udma_start(struct ivtv *itv)  in ivtv_udma_start()  argument
196 	write_reg(itv->udma.SG_handle, IVTV_REG_DECDMAADDR);  in ivtv_udma_start()
198 	set_bit(IVTV_F_I_DMA, &itv->i_flags);  in ivtv_udma_start()
199 	set_bit(IVTV_F_I_UDMA, &itv->i_flags);  in ivtv_udma_start()
200 	clear_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags);  in ivtv_udma_start()
203 void ivtv_udma_prepare(struct ivtv *itv)  in ivtv_udma_prepare()  argument
207 	spin_lock_irqsave(&itv->dma_reg_lock, flags);  in ivtv_udma_prepare()
208 	if (!test_bit(IVTV_F_I_DMA, &itv->i_flags))  in ivtv_udma_prepare()
209 		ivtv_udma_start(itv);  in ivtv_udma_prepare()
211 		set_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags);  in ivtv_udma_prepare()
212 	spin_unlock_irqrestore(&itv->dma_reg_lock, flags);  in ivtv_udma_prepare()