[linux-2.6-block.git] / drivers / media / video / videobuf-vmalloc.c

/*
 * helper functions for vmalloc 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>
 *
 * 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 <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/interrupt.h>

#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <asm/page.h>
#include <asm/pgtable.h>

#include <media/videobuf-vmalloc.h>

#define MAGIC_DMABUF   0x17760309
#define MAGIC_VMAL_MEM 0x18221223

#define MAGIC_CHECK(is,should)	if (unlikely((is) != (should))) \
	{ printk(KERN_ERR "magic mismatch: %x (expected %x)\n",is,should); BUG(); }

static int debug;
module_param(debug, int, 0644);

MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_LICENSE("GPL");

#define dprintk(level, fmt, arg...)	if (debug >= level) \
	printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg)


/***************************************************************************/

static void
videobuf_vm_open(struct vm_area_struct *vma)
{
	struct videobuf_mapping *map = vma->vm_private_data;

	dprintk(2,"vm_open %p [count=%u,vma=%08lx-%08lx]\n",map,
		map->count,vma->vm_start,vma->vm_end);

	map->count++;
}

static void
videobuf_vm_close(struct vm_area_struct *vma)
{
	struct videobuf_mapping *map = vma->vm_private_data;
	struct videobuf_queue *q = map->q;
	int i;

	dprintk(2,"vm_close %p [count=%u,vma=%08lx-%08lx]\n",map,
		map->count,vma->vm_start,vma->vm_end);

	map->count--;
	if (0 == map->count) {
		dprintk(1,"munmap %p q=%p\n",map,q);
		mutex_lock(&q->vb_lock);
		for (i = 0; i < VIDEO_MAX_FRAME; i++) {
			if (NULL == q->bufs[i])
				continue;

			if (q->bufs[i]->map != map)
				continue;

			q->bufs[i]->map   = NULL;
			q->bufs[i]->baddr = 0;
		}
		mutex_unlock(&q->vb_lock);
		kfree(map);
	}
	return;
}

static struct vm_operations_struct videobuf_vm_ops =
{
	.open     = videobuf_vm_open,
	.close    = videobuf_vm_close,
};

/* ---------------------------------------------------------------------
 * vmalloc handlers for the generic methods
 */

/* Allocated area consists on 3 parts:
	struct video_buffer
	struct <driver>_buffer (cx88_buffer, saa7134_buf, ...)
	struct videobuf_dma_sg_memory
 */

static void *__videobuf_alloc(size_t size)
{
	struct videobuf_vmalloc_memory *mem;
	struct videobuf_buffer *vb;

	vb = kzalloc(size+sizeof(*mem),GFP_KERNEL);

	mem = vb->priv = ((char *)vb)+size;
	mem->magic=MAGIC_VMAL_MEM;

	dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
		__FUNCTION__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb),
		mem,(long)sizeof(*mem));

	return vb;
}

static int __videobuf_iolock (struct videobuf_queue* q,
			      struct videobuf_buffer *vb,
			      struct v4l2_framebuffer *fbuf)
{
	int pages;
	struct videobuf_vmalloc_memory *mem=vb->priv;

	BUG_ON(!mem);

	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);

	pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;

	/* Currently, doesn't support V4L2_MEMORY_OVERLAY */
	if ((vb->memory != V4L2_MEMORY_MMAP) &&
				(vb->memory != V4L2_MEMORY_USERPTR) ) {
		printk(KERN_ERR "Method currently unsupported.\n");
		return -EINVAL;
	}

	/* FIXME: should be tested with kernel mmap mem */
	mem->vmalloc=vmalloc_user (PAGE_ALIGN(vb->size));
	if (NULL == mem->vmalloc) {
		printk(KERN_ERR "vmalloc (%d pages) failed\n",pages);
		return -ENOMEM;
	}

	dprintk(1,"vmalloc is at addr 0x%08lx, size=%d\n",
				(unsigned long)mem->vmalloc,
				pages << PAGE_SHIFT);

	/* It seems that some kernel versions need to do remap *after*
	   the mmap() call
	 */
	if (mem->vma) {
		int retval=remap_vmalloc_range(mem->vma, mem->vmalloc,0);
		kfree(mem->vma);
		mem->vma=NULL;
		if (retval<0) {
			dprintk(1,"mmap app bug: remap_vmalloc_range area %p error %d\n",
				mem->vmalloc,retval);
			return retval;
		}
	}

	return 0;
}

static int __videobuf_sync(struct videobuf_queue *q,
			   struct videobuf_buffer *buf)
{
	return 0;
}

static int __videobuf_mmap_free(struct videobuf_queue *q)
{
	unsigned int i;

	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
		if (q->bufs[i]) {
			if (q->bufs[i]->map)
				return -EBUSY;
		}
	}

	return 0;
}

static int __videobuf_mmap_mapper(struct videobuf_queue *q,
			 struct vm_area_struct *vma)
{
	struct videobuf_vmalloc_memory *mem;
	struct videobuf_mapping *map;
	unsigned int first;
	int retval;
	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;

	if (! (vma->vm_flags & VM_WRITE) || ! (vma->vm_flags & VM_SHARED))
		return -EINVAL;

	/* look for first buffer to map */
	for (first = 0; first < VIDEO_MAX_FRAME; first++) {
		if (NULL == q->bufs[first])
			continue;

		if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
			continue;
		if (q->bufs[first]->boff == offset)
			break;
	}
	if (VIDEO_MAX_FRAME == first) {
		dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n",
			(vma->vm_pgoff << PAGE_SHIFT));
		return -EINVAL;
	}

	/* create mapping + update buffer list */
	map = q->bufs[first]->map = kzalloc(sizeof(struct videobuf_mapping),GFP_KERNEL);
	if (NULL == map)
		return -ENOMEM;

	map->start = vma->vm_start;
	map->end   = vma->vm_end;
	map->q     = q;

	q->bufs[first]->baddr = vma->vm_start;

	vma->vm_ops          = &videobuf_vm_ops;
	vma->vm_flags       |= VM_DONTEXPAND | VM_RESERVED;
	vma->vm_private_data = map;

	mem=q->bufs[first]->priv;
	BUG_ON (!mem);
	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);

	/* Try to remap memory */
	retval=remap_vmalloc_range(vma, mem->vmalloc,0);
	if (retval<0) {
		dprintk(1,"mmap: postponing remap_vmalloc_range\n");

		mem->vma=kmalloc(sizeof(*vma),GFP_KERNEL);
		if (!mem->vma) {
			kfree(map);
			q->bufs[first]->map=NULL;
			return -ENOMEM;
		}
		memcpy(mem->vma,vma,sizeof(*vma));
	}

	dprintk(1,"mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
		map,q,vma->vm_start,vma->vm_end,
		(long int) q->bufs[first]->bsize,
		vma->vm_pgoff,first);

	videobuf_vm_open(vma);

	return (0);
}

static int __videobuf_copy_to_user ( struct videobuf_queue *q,
				char __user *data, size_t count,
				int nonblocking )
{
	struct videobuf_vmalloc_memory *mem=q->read_buf->priv;
	BUG_ON (!mem);
	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);

	BUG_ON (!mem->vmalloc);

	/* copy to userspace */
	if (count > q->read_buf->size - q->read_off)
		count = q->read_buf->size - q->read_off;

	if (copy_to_user(data, mem->vmalloc+q->read_off, count))
		return -EFAULT;

	return count;
}

static int __videobuf_copy_stream ( struct videobuf_queue *q,
				char __user *data, size_t count, size_t pos,
				int vbihack, int nonblocking )
{
	unsigned int  *fc;
	struct videobuf_vmalloc_memory *mem=q->read_buf->priv;
	BUG_ON (!mem);
	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);

	if (vbihack) {
		/* dirty, undocumented hack -- pass the frame counter
			* within the last four bytes of each vbi data block.
			* We need that one to maintain backward compatibility
			* to all vbi decoding software out there ... */
		fc  = (unsigned int*)mem->vmalloc;
		fc += (q->read_buf->size>>2) -1;
		*fc = q->read_buf->field_count >> 1;
		dprintk(1,"vbihack: %d\n",*fc);
	}

	/* copy stuff using the common method */
	count = __videobuf_copy_to_user (q,data,count,nonblocking);

	if ( (count==-EFAULT) && (0 == pos) )
		return -EFAULT;

	return count;
}

static struct videobuf_qtype_ops qops = {
	.magic        = MAGIC_QTYPE_OPS,

	.alloc        = __videobuf_alloc,
	.iolock       = __videobuf_iolock,
	.sync         = __videobuf_sync,
	.mmap_free    = __videobuf_mmap_free,
	.mmap_mapper  = __videobuf_mmap_mapper,
	.video_copy_to_user = __videobuf_copy_to_user,
	.copy_stream  = __videobuf_copy_stream,
};

void videobuf_queue_vmalloc_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)
{
	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
				 priv, &qops);
}

EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init);

void *videobuf_to_vmalloc (struct videobuf_buffer *buf)
{
	struct videobuf_vmalloc_memory *mem=buf->priv;
	BUG_ON (!mem);
	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);

	return mem->vmalloc;
}
EXPORT_SYMBOL_GPL(videobuf_to_vmalloc);

void videobuf_vmalloc_free (struct videobuf_buffer *buf)
{
	struct videobuf_vmalloc_memory *mem=buf->priv;
	BUG_ON (!mem);

	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);

	vfree(mem->vmalloc);
	mem->vmalloc=NULL;

	return;
}
EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
87b9ad07 MCC	1	/*
	2	* helper functions for vmalloc video4linux capture buffers
	3	*
	4	* The functions expect the hardware being able to scatter gatter
	5	* (i.e. the buffers are not linear in physical memory, but fragmented
	6	* into PAGE_SIZE chunks). They also assume the driver does not need
	7	* to touch the video data.
	8	*
	9	* (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2
	14	*/
	15
	16	#include <linux/init.h>
	17	#include <linux/module.h>
	18	#include <linux/moduleparam.h>
	19	#include <linux/slab.h>
	20	#include <linux/interrupt.h>
	21
	22	#include <linux/pci.h>
	23	#include <linux/vmalloc.h>
	24	#include <linux/pagemap.h>
	25	#include <asm/page.h>
	26	#include <asm/pgtable.h>
	27
	28	#include <media/videobuf-vmalloc.h>
	29
	30	#define MAGIC_DMABUF 0x17760309
	31	#define MAGIC_VMAL_MEM 0x18221223
	32
	33	#define MAGIC_CHECK(is,should) if (unlikely((is) != (should))) \
	34	{ printk(KERN_ERR "magic mismatch: %x (expected %x)\n",is,should); BUG(); }
	35
ff699e6b	36	static int debug;
87b9ad07 MCC	37	module_param(debug, int, 0644);
	38
	39	MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers");
	40	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
	41	MODULE_LICENSE("GPL");
	42
	43	#define dprintk(level, fmt, arg...) if (debug >= level) \
493977f0	44	printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg)
87b9ad07 MCC	45
	46
	47	/***************************************************************************/
	48
	49	static void
	50	videobuf_vm_open(struct vm_area_struct *vma)
	51	{
	52	struct videobuf_mapping *map = vma->vm_private_data;
	53
0b29669c	54	dprintk(2,"vm_open %p [count=%u,vma=%08lx-%08lx]\n",map,
87b9ad07 MCC	55	map->count,vma->vm_start,vma->vm_end);
	56
	57	map->count++;
	58	}
	59
	60	static void
	61	videobuf_vm_close(struct vm_area_struct *vma)
	62	{
	63	struct videobuf_mapping *map = vma->vm_private_data;
	64	struct videobuf_queue *q = map->q;
87b9ad07 MCC	65	int i;
87b9ad07 MCC	66
0b29669c	67	dprintk(2,"vm_close %p [count=%u,vma=%08lx-%08lx]\n",map,
87b9ad07 MCC	68	map->count,vma->vm_start,vma->vm_end);
	69
	70	map->count--;
	71	if (0 == map->count) {
	72	dprintk(1,"munmap %p q=%p\n",map,q);
64f9477f	73	mutex_lock(&q->vb_lock);
87b9ad07 MCC	74	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
	75	if (NULL == q->bufs[i])
	76	continue;
87b9ad07	77
851c0c96	78	if (q->bufs[i]->map != map)
87b9ad07	79	continue;
123f8ef6	80
851c0c96	81	q->bufs[i]->map = NULL;
87b9ad07	82	q->bufs[i]->baddr = 0;
87b9ad07	83	}
64f9477f	84	mutex_unlock(&q->vb_lock);
87b9ad07 MCC	85	kfree(map);
	86	}
	87	return;
	88	}
	89
	90	static struct vm_operations_struct videobuf_vm_ops =
	91	{
	92	.open = videobuf_vm_open,
	93	.close = videobuf_vm_close,
	94	};
	95
	96	/* ---------------------------------------------------------------------
	97	* vmalloc handlers for the generic methods
	98	*/
	99
	100	/* Allocated area consists on 3 parts:
	101	struct video_buffer
	102	struct <driver>_buffer (cx88_buffer, saa7134_buf, ...)
0705135e	103	struct videobuf_dma_sg_memory
87b9ad07 MCC	104	*/
	105
	106	static void *__videobuf_alloc(size_t size)
	107	{
384b835a	108	struct videobuf_vmalloc_memory *mem;
87b9ad07 MCC	109	struct videobuf_buffer *vb;
	110
	111	vb = kzalloc(size+sizeof(*mem),GFP_KERNEL);
	112
	113	mem = vb->priv = ((char *)vb)+size;
	114	mem->magic=MAGIC_VMAL_MEM;
	115
	116	dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
	117	__FUNCTION__,vb,(long)sizeof(vb),(long)size-sizeof(vb),
	118	mem,(long)sizeof(*mem));
	119
	120	return vb;
	121	}
	122
	123	static int __videobuf_iolock (struct videobuf_queue* q,
	124	struct videobuf_buffer *vb,
	125	struct v4l2_framebuffer *fbuf)
	126	{
	127	int pages;
384b835a	128	struct videobuf_vmalloc_memory *mem=vb->priv;
87b9ad07 MCC	129
	130	BUG_ON(!mem);
	131
	132	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	133
87b9ad07 MCC	134	pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
	135
	136	/* Currently, doesn't support V4L2_MEMORY_OVERLAY */
	137	if ((vb->memory != V4L2_MEMORY_MMAP) &&
	138	(vb->memory != V4L2_MEMORY_USERPTR) ) {
	139	printk(KERN_ERR "Method currently unsupported.\n");
	140	return -EINVAL;
	141	}
	142
	143	/* FIXME: should be tested with kernel mmap mem */
	144	mem->vmalloc=vmalloc_user (PAGE_ALIGN(vb->size));
	145	if (NULL == mem->vmalloc) {
e78dcf55	146	printk(KERN_ERR "vmalloc (%d pages) failed\n",pages);
87b9ad07 MCC	147	return -ENOMEM;
	148	}
	149
	150	dprintk(1,"vmalloc is at addr 0x%08lx, size=%d\n",
	151	(unsigned long)mem->vmalloc,
	152	pages << PAGE_SHIFT);
	153
	154	/* It seems that some kernel versions need to do remap after
	155	the mmap() call
	156	*/
	157	if (mem->vma) {
	158	int retval=remap_vmalloc_range(mem->vma, mem->vmalloc,0);
	159	kfree(mem->vma);
	160	mem->vma=NULL;
	161	if (retval<0) {
	162	dprintk(1,"mmap app bug: remap_vmalloc_range area %p error %d\n",
	163	mem->vmalloc,retval);
	164	return retval;
	165	}
	166	}
	167
	168	return 0;
	169	}
	170
	171	static int __videobuf_sync(struct videobuf_queue *q,
	172	struct videobuf_buffer *buf)
	173	{
	174	return 0;
	175	}
	176
	177	static int __videobuf_mmap_free(struct videobuf_queue *q)
	178	{
	179	unsigned int i;
	180
	181	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
	182	if (q->bufs[i]) {
851c0c96	183	if (q->bufs[i]->map)
87b9ad07 MCC	184	return -EBUSY;
	185	}
	186	}
	187
	188	return 0;
	189	}
	190
	191	static int __videobuf_mmap_mapper(struct videobuf_queue *q,
	192	struct vm_area_struct *vma)
	193	{
384b835a	194	struct videobuf_vmalloc_memory *mem;
87b9ad07 MCC	195	struct videobuf_mapping *map;
	196	unsigned int first;
	197	int retval;
	198	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
	199
	200	if (! (vma->vm_flags & VM_WRITE) \|\| ! (vma->vm_flags & VM_SHARED))
	201	return -EINVAL;
	202
	203	/* look for first buffer to map */
	204	for (first = 0; first < VIDEO_MAX_FRAME; first++) {
	205	if (NULL == q->bufs[first])
	206	continue;
	207
	208	if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
	209	continue;
	210	if (q->bufs[first]->boff == offset)
	211	break;
	212	}
	213	if (VIDEO_MAX_FRAME == first) {
	214	dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n",
	215	(vma->vm_pgoff << PAGE_SHIFT));
	216	return -EINVAL;
	217	}
87b9ad07 MCC	218
87b9ad07 MCC	219	/* create mapping + update buffer list */
0b29669c	220	map = q->bufs[first]->map = kzalloc(sizeof(struct videobuf_mapping),GFP_KERNEL);
87b9ad07 MCC	221	if (NULL == map)
	222	return -ENOMEM;
	223
	224	map->start = vma->vm_start;
	225	map->end = vma->vm_end;
	226	map->q = q;
	227
	228	q->bufs[first]->baddr = vma->vm_start;
	229
	230	vma->vm_ops = &videobuf_vm_ops;
	231	vma->vm_flags \|= VM_DONTEXPAND \| VM_RESERVED;
	232	vma->vm_private_data = map;
	233
851c0c96 MCC	234	mem=q->bufs[first]->priv;
	235	BUG_ON (!mem);
	236	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	237
87b9ad07 MCC	238	/* Try to remap memory */
	239	retval=remap_vmalloc_range(vma, mem->vmalloc,0);
	240	if (retval<0) {
	241	dprintk(1,"mmap: postponing remap_vmalloc_range\n");
851c0c96	242
87b9ad07 MCC	243	mem->vma=kmalloc(sizeof(*vma),GFP_KERNEL);
	244	if (!mem->vma) {
	245	kfree(map);
851c0c96	246	q->bufs[first]->map=NULL;
87b9ad07 MCC	247	return -ENOMEM;
	248	}
	249	memcpy(mem->vma,vma,sizeof(*vma));
	250	}
	251
	252	dprintk(1,"mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
	253	map,q,vma->vm_start,vma->vm_end,
	254	(long int) q->bufs[first]->bsize,
	255	vma->vm_pgoff,first);
	256
	257	videobuf_vm_open(vma);
	258
	259	return (0);
	260	}
	261
87b9ad07 MCC	262	static int __videobuf_copy_to_user ( struct videobuf_queue *q,
	263	char __user *data, size_t count,
	264	int nonblocking )
	265	{
384b835a	266	struct videobuf_vmalloc_memory *mem=q->read_buf->priv;
87b9ad07 MCC	267	BUG_ON (!mem);
	268	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	269
	270	BUG_ON (!mem->vmalloc);
	271
	272	/* copy to userspace */
	273	if (count > q->read_buf->size - q->read_off)
	274	count = q->read_buf->size - q->read_off;
	275
	276	if (copy_to_user(data, mem->vmalloc+q->read_off, count))
	277	return -EFAULT;
	278
	279	return count;
	280	}
	281
	282	static int __videobuf_copy_stream ( struct videobuf_queue *q,
	283	char __user *data, size_t count, size_t pos,
	284	int vbihack, int nonblocking )
	285	{
	286	unsigned int *fc;
384b835a	287	struct videobuf_vmalloc_memory *mem=q->read_buf->priv;
87b9ad07 MCC	288	BUG_ON (!mem);
	289	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	290
	291	if (vbihack) {
	292	/* dirty, undocumented hack -- pass the frame counter
	293	* within the last four bytes of each vbi data block.
	294	* We need that one to maintain backward compatibility
	295	* to all vbi decoding software out there ... */
	296	fc = (unsigned int*)mem->vmalloc;
	297	fc += (q->read_buf->size>>2) -1;
	298	*fc = q->read_buf->field_count >> 1;
	299	dprintk(1,"vbihack: %d\n",*fc);
	300	}
	301
	302	/* copy stuff using the common method */
	303	count = __videobuf_copy_to_user (q,data,count,nonblocking);
	304
	305	if ( (count==-EFAULT) && (0 == pos) )
	306	return -EFAULT;
	307
	308	return count;
	309	}
	310
	311	static struct videobuf_qtype_ops qops = {
	312	.magic = MAGIC_QTYPE_OPS,
	313
	314	.alloc = __videobuf_alloc,
	315	.iolock = __videobuf_iolock,
	316	.sync = __videobuf_sync,
	317	.mmap_free = __videobuf_mmap_free,
	318	.mmap_mapper = __videobuf_mmap_mapper,
13bcd5d0	319	.video_copy_to_user = __videobuf_copy_to_user,
87b9ad07 MCC	320	.copy_stream = __videobuf_copy_stream,
	321	};
	322
	323	void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
	324	struct videobuf_queue_ops *ops,
	325	void *dev,
	326	spinlock_t *irqlock,
	327	enum v4l2_buf_type type,
	328	enum v4l2_field field,
	329	unsigned int msize,
	330	void *priv)
	331	{
d4cae5a5 MCC	332	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
d4cae5a5 MCC	333	priv, &qops);
87b9ad07 MCC	334	}
	335
	336	EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init);
	337
	338	void videobuf_to_vmalloc (struct videobuf_buffer buf)
	339	{
384b835a	340	struct videobuf_vmalloc_memory *mem=buf->priv;
87b9ad07 MCC	341	BUG_ON (!mem);
	342	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	343
	344	return mem->vmalloc;
	345	}
	346	EXPORT_SYMBOL_GPL(videobuf_to_vmalloc);
	347
	348	void videobuf_vmalloc_free (struct videobuf_buffer *buf)
	349	{
384b835a	350	struct videobuf_vmalloc_memory *mem=buf->priv;
87b9ad07 MCC	351	BUG_ON (!mem);
	352
	353	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	354
	355	vfree(mem->vmalloc);
c520a497	356	mem->vmalloc=NULL;
87b9ad07 MCC	357
	358	return;
	359	}
	360	EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);
	361
	362	/*
	363	* Local variables:
	364	* c-basic-offset: 8
	365	* End:
	366	*/