Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (310 commits)
  V4L/DVB (6316): Change list_for_each+list_entry to list_for_each_entry
  V4L/DVB (6315): pvrusb2: Change list_for_each+list_entry to list_for_each_entry
  V4L/DVB (6314): saa7134: Replace list_for_each+list_entry with list_for_each_entry
  V4L/DVB (6313): ivtv: Replace list_for_each+list_entry with list_for_each_entry
  V4L/DVB (6312): cx88: Replace list_for_each+list_entry with list_for_each_entry
  V4L/DVB (6311): dvb: Replace list_for_each+list_entry with list_for_each_entry
  V4L/DVB (6308): V4L: zc0301, remove bad usage of ERESTARTSYS
  V4L/DVB (6307): V4L: w9968cf, remove bad usage of ERESTARTSYS
  V4L/DVB (6306): Few clenups for saa7134 resume code
  V4L/DVB (6305): V4L: videobuf-core.c avoid NULL dereferences in videobuf-core
  V4L/DVB (6301): pvrusb: Update DEBUGIFC sysfs to kernel 2.6.13+
  V4L/DVB (6300): CodingStyle cleanup
  V4L/DVB (6299): dvb: Add dependencies for VIDEOBUF_DVB
  V4L/DVB (6297): cx23885: remove wrong Kconfig selection of VIDEOBUF
  V4L/DVB (6296): dib0700: add support for AverMedia DVB-T Express card
  V4L/DVB (6295): saa7134: add autodetection for KWorld ATSC-115
  V4L/DVB (6293): V4L: convert struct class_device to struct device
  V4L/DVB (6292): videobuf_core init always require callback implementation
  V4L/DVB (6291): Fix: avoid oops on some SMP machines
  V4L/DVB (6290): remove videobuf_set_pci_ops
  ...

1 files changed, 122 insertions, 0 deletions

diff --git a/include/media/videobuf-dma-sg.h b/include/media/videobuf-dma-sg.h
new file mode 100644
index 00000000000..38105031db2
--- /dev/null
+++ b/include/media/videobuf-dma-sg.h
@@ -0,0 +1,122 @@
+/*
+ * helper functions for PCI DMA video4linux capture buffers
+ *
+ * The functions expect the hardware being able to scatter gatter
+ * (i.e. the buffers are not linear in physical memory, but fragmented
+ * into PAGE_SIZE chunks).  They also assume the driver does not need
+ * to touch the video data.
+ *
+ * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
+ *
+ * Highly based on video-buf written originally by:
+ * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org>
+ * (c) 2006 Mauro Carvalho Chehab, <mchehab@infradead.org>
+ * (c) 2006 Ted Walther and John Sokol
+ *
+ * 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
+ */
+
+#include <media/videobuf-core.h>
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * Return a scatterlist for some page-aligned vmalloc()'ed memory
+ * block (NULL on errors).  Memory for the scatterlist is allocated
+ * using kmalloc.  The caller must free the memory.
+ */
+struct scatterlist* videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages);
+
+/*
+ * Return a scatterlist for a an array of userpages (NULL on errors).
+ * Memory for the scatterlist is allocated using kmalloc.  The caller
+ * must free the memory.
+ */
+struct scatterlist* videobuf_pages_to_sg(struct page **pages, int nr_pages,
+					 int offset);
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * A small set of helper functions to manage buffers (both userland
+ * and kernel) for DMA.
+ *
+ * videobuf_dma_init_*()
+ *	creates a buffer.  The userland version takes a userspace
+ *	pointer + length.  The kernel version just wants the size and
+ *	does memory allocation too using vmalloc_32().
+ *
+ * videobuf_dma_*()
+ *	see Documentation/DMA-mapping.txt, these functions to
+ *	basically the same.  The map function does also build a
+ *	scatterlist for the buffer (and unmap frees it ...)
+ *
+ * videobuf_dma_free()
+ *	no comment ...
+ *
+ */
+
+struct videobuf_dmabuf {
+	u32                 magic;
+
+	/* for userland buffer */
+	int                 offset;
+	struct page         **pages;
+
+	/* for kernel buffers */
+	void                *vmalloc;
+
+	/* Stores the userspace pointer to vmalloc area */
+	void                *varea;
+
+	/* for overlay buffers (pci-pci dma) */
+	dma_addr_t          bus_addr;
+
+	/* common */
+	struct scatterlist  *sglist;
+	int                 sglen;
+	int                 nr_pages;
+	int                 direction;
+};
+
+struct videbuf_pci_sg_memory
+{
+	u32                 magic;
+
+	/* for mmap'ed buffers */
+	struct videobuf_dmabuf  dma;
+};
+
+void videobuf_dma_init(struct videobuf_dmabuf *dma);
+int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction,
+			   unsigned long data, unsigned long size);
+int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction,
+			     int nr_pages);
+int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction,
+			      dma_addr_t addr, int nr_pages);
+int videobuf_dma_free(struct videobuf_dmabuf *dma);
+
+int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma);
+int videobuf_dma_sync(struct videobuf_queue* q,struct videobuf_dmabuf *dma);
+int videobuf_dma_unmap(struct videobuf_queue* q,struct videobuf_dmabuf *dma);
+struct videobuf_dmabuf *videobuf_to_dma (struct videobuf_buffer *buf);
+
+void *videobuf_pci_alloc (size_t size);
+
+void videobuf_queue_pci_init(struct videobuf_queue* q,
+			 struct videobuf_queue_ops *ops,
+			 void *dev,
+			 spinlock_t *irqlock,
+			 enum v4l2_buf_type type,
+			 enum v4l2_field field,
+			 unsigned int msize,
+			 void *priv);
+
+	/*FIXME: these variants are used only on *-alsa code, where videobuf is
+	 * used without queue
+	 */
+int videobuf_pci_dma_map(struct pci_dev *pci,struct videobuf_dmabuf *dma);
+int videobuf_pci_dma_unmap(struct pci_dev *pci,struct videobuf_dmabuf *dma);
+