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-rw-r--r--drivers/media/pci/ivtv/ivtv-queue.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/media/pci/ivtv/ivtv-queue.h b/drivers/media/pci/ivtv/ivtv-queue.h
new file mode 100644
index 000000000..983e99642
--- /dev/null
+++ b/drivers/media/pci/ivtv/ivtv-queue.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ buffer queues.
+ Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
+ Copyright (C) 2004 Chris Kennedy <c@groovy.org>
+ Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
+
+ */
+
+#ifndef IVTV_QUEUE_H
+#define IVTV_QUEUE_H
+
+#define IVTV_DMA_UNMAPPED ((u32) -1)
+#define SLICED_VBI_PIO 0
+
+/* ivtv_buffer utility functions */
+
+static inline int ivtv_might_use_pio(struct ivtv_stream *s)
+{
+ return s->dma == 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 == 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 != 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 (ivtv_use_dma(s))
+ dma_sync_single_for_cpu(&s->itv->pdev->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 (ivtv_use_dma(s))
+ dma_sync_single_for_device(&s->itv->pdev->dev,
+ buf->dma_handle, s->buf_size + 256,
+ s->dma);
+}
+
+int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src, int copybytes);
+void ivtv_buf_swap(struct ivtv_buffer *buf);
+
+/* ivtv_queue utility functions */
+void ivtv_queue_init(struct ivtv_queue *q);
+void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q);
+struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q);
+int ivtv_queue_move(struct ivtv_stream *s, struct ivtv_queue *from, struct ivtv_queue *steal,
+ struct ivtv_queue *to, int needed_bytes);
+void ivtv_flush_queues(struct ivtv_stream *s);
+
+/* ivtv_stream utility functions */
+int ivtv_stream_alloc(struct ivtv_stream *s);
+void ivtv_stream_free(struct ivtv_stream *s);
+
+static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s)
+{
+ if (ivtv_use_dma(s))
+ dma_sync_single_for_cpu(&s->itv->pdev->dev, s->sg_handle,
+ sizeof(struct ivtv_sg_element),
+ DMA_TO_DEVICE);
+}
+
+static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s)
+{
+ if (ivtv_use_dma(s))
+ dma_sync_single_for_device(&s->itv->pdev->dev, s->sg_handle,
+ sizeof(struct ivtv_sg_element),
+ DMA_TO_DEVICE);
+}
+
+#endif