Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#ifndef IVTV_QUEUE_H
+#define IVTV_QUEUE_H
+
#define IVTV_DMA_UNMAPPED ((u32) -1)
+#define SLICED_VBI_PIO 1
/* ivtv_buffer utility functions */
+
+static inline int ivtv_might_use_pio(struct ivtv_stream *s)
+{
+ return s->dma == PCI_DMA_NONE || (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI);
+}
+
+static inline int ivtv_use_pio(struct ivtv_stream *s)
+{
+ struct ivtv *itv = s->itv;
+
+ return s->dma == PCI_DMA_NONE ||
+ (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set);
+}
+
+static inline int ivtv_might_use_dma(struct ivtv_stream *s)
+{
+ return s->dma != PCI_DMA_NONE;
+}
+
+static inline int ivtv_use_dma(struct ivtv_stream *s)
+{
+ return !ivtv_use_pio(s);
+}
+
static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf)
{
- if (s->dma != PCI_DMA_NONE)
+ if (ivtv_use_dma(s))
pci_dma_sync_single_for_cpu(s->itv->dev, buf->dma_handle,
s->buf_size + 256, s->dma);
}
static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf)
{
- if (s->dma != PCI_DMA_NONE)
+ if (ivtv_use_dma(s))
pci_dma_sync_single_for_device(s->itv->dev, buf->dma_handle,
s->buf_size + 256, s->dma);
}
static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s)
{
- pci_dma_sync_single_for_cpu(s->itv->dev, s->SG_handle,
- sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE);
+ if (ivtv_use_dma(s))
+ pci_dma_sync_single_for_cpu(s->itv->dev, s->sg_handle,
+ sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
}
static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s)
{
- pci_dma_sync_single_for_device(s->itv->dev, s->SG_handle,
- sizeof(struct ivtv_SG_element) * s->buffers, PCI_DMA_TODEVICE);
+ if (ivtv_use_dma(s))
+ pci_dma_sync_single_for_device(s->itv->dev, s->sg_handle,
+ sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
}
+
+#endif