V4L/DVB (7566): videobuf-dvb: allow its usage with videobuf-vmalloc

videobuf-dvb were still using a function that were videobuf-dma-sg
dependent. This patch creates a generic handler for this function. This
way, videobuf-dvb can now work with all videobuf implementations.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/videobuf-core.c

@@ -94,6 +94,13 @@ int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb,
 	return CALL(q, iolock, q, vb, fbuf);
 }
 
+void *videobuf_queue_to_vmalloc (struct videobuf_queue *q,
+			   struct videobuf_buffer *buf)
+{
+	return CALL(q, vmalloc, buf);
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_to_vmalloc);
+
 /* --------------------------------------------------------------------- */
 
 

drivers/media/video/videobuf-dma-sg.c

@@ -432,6 +432,16 @@ static void *__videobuf_alloc(size_t size)
 	return vb;
 }
 
+static void *__videobuf_to_vmalloc (struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_sg_memory *mem = buf->priv;
+	BUG_ON(!mem);
+
+	MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+
+	return mem->dma.vmalloc;
+}
+
 static int __videobuf_iolock (struct videobuf_queue* q,
 			      struct videobuf_buffer *vb,
 			      struct v4l2_framebuffer *fbuf)
@@ -677,6 +687,7 @@ static struct videobuf_qtype_ops sg_ops = {
 	.mmap_mapper  = __videobuf_mmap_mapper,
 	.video_copy_to_user = __videobuf_copy_to_user,
 	.copy_stream  = __videobuf_copy_stream,
+	.vmalloc      = __videobuf_to_vmalloc,
 };
 
 void *videobuf_sg_alloc(size_t size)

drivers/media/video/videobuf-dvb.c

@@ -20,9 +20,10 @@
 #include <linux/fs.h>
 #include <linux/kthread.h>
 #include <linux/file.h>
+
 #include <linux/freezer.h>
 
-#include <media/videobuf-dma-sg.h>
+#include <media/videobuf-core.h>
 #include <media/videobuf-dvb.h>
 
 /* ------------------------------------------------------------------ */
@@ -45,7 +46,7 @@ static int videobuf_dvb_thread(void *data)
 	struct videobuf_buffer *buf;
 	unsigned long flags;
 	int err;
-	struct videobuf_dmabuf *dma;
+	void *outp;
 
 	dprintk("dvb thread started\n");
 	set_freezable();
@@ -66,9 +67,10 @@ static int videobuf_dvb_thread(void *data)
 		try_to_freeze();
 
 		/* feed buffer data to demux */
-		dma=videobuf_to_dma(buf);
+		outp = videobuf_queue_to_vmalloc (&dvb->dvbq, buf);
+
 		if (buf->state == VIDEOBUF_DONE)
-			dvb_dmx_swfilter(&dvb->demux, dma->vmalloc,
+			dvb_dmx_swfilter(&dvb->demux, outp,
 					 buf->size);
 
 		/* requeue buffer */

drivers/media/video/videobuf-vmalloc.c

@@ -387,6 +387,7 @@ static struct videobuf_qtype_ops qops = {
 	.mmap_mapper  = __videobuf_mmap_mapper,
 	.video_copy_to_user = __videobuf_copy_to_user,
 	.copy_stream  = __videobuf_copy_stream,
+	.vmalloc      = videobuf_to_vmalloc,
 };
 
 void videobuf_queue_vmalloc_init(struct videobuf_queue* q,

include/media/videobuf-core.h

@@ -13,6 +13,9 @@
  * the Free Software Foundation; either version 2
  */
 
+#ifndef _VIDEOBUF_CORE_H
+#define _VIDEOBUF_CORE_H
+
 #include <linux/poll.h>
 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 #include <linux/videodev.h>
@@ -123,7 +126,8 @@ struct videobuf_queue_ops {
 struct videobuf_qtype_ops {
 	u32                     magic;
 
-	void* (*alloc)		(size_t size);
+	void *(*alloc)		(size_t size);
+	void *(*vmalloc)	(struct videobuf_buffer *buf);
 	int (*iolock)		(struct videobuf_queue* q,
 				 struct videobuf_buffer *vb,
 				 struct v4l2_framebuffer *fbuf);
@@ -185,6 +189,10 @@ int videobuf_iolock(struct videobuf_queue* q, struct videobuf_buffer *vb,
 
 void *videobuf_alloc(struct videobuf_queue* q);
 
+/* Used on videobuf-dvb */
+void *videobuf_queue_to_vmalloc (struct videobuf_queue* q,
+				 struct videobuf_buffer *buf);
+
 void videobuf_queue_core_init(struct videobuf_queue *q,
 			 struct videobuf_queue_ops *ops,
 			 struct device *dev,
@@ -233,10 +241,4 @@ int videobuf_mmap_free(struct videobuf_queue *q);
 int videobuf_mmap_mapper(struct videobuf_queue *q,
 			 struct vm_area_struct *vma);
 
-/* --------------------------------------------------------------------- */
-
-/*
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
+#endif

include/media/videobuf-vmalloc.h

@@ -12,6 +12,8 @@
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2
  */
+#ifndef _VIDEOBUF_VMALLOC_H
+#define _VIDEOBUF_VMALLOC_H
 
 #include <media/videobuf-core.h>
 
@@ -39,3 +41,5 @@ void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
 void *videobuf_to_vmalloc (struct videobuf_buffer *buf);
 
 void videobuf_vmalloc_free (struct videobuf_buffer *buf);
+
+#endif