Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / media / pci / ivtv / ivtv-queue.h

diff --git a/kernel/drivers/media/pci/ivtv/ivtv-queue.h b/kernel/drivers/media/pci/ivtv/ivtv-queue.h
new file mode 100644 (file)
index 0000000..9123383
--- /dev/null
+++ b/kernel/drivers/media/pci/ivtv/ivtv-queue.h
@@ -0,0 +1,96 @@
+/*
+    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>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    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 0
+
+/* 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 (ivtv_use_dma(s))
+               pci_dma_sync_single_for_cpu(s->itv->pdev, 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))
+               pci_dma_sync_single_for_device(s->itv->pdev, 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))
+               pci_dma_sync_single_for_cpu(s->itv->pdev, s->sg_handle,
+                       sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
+}
+
+static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s)
+{
+       if (ivtv_use_dma(s))
+               pci_dma_sync_single_for_device(s->itv->pdev, s->sg_handle,
+                       sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
+}
+
+#endif