[deliverable/linux.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 = 0;
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-sg: " 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=%d,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=%d,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->lock);
		for (i = 0; i < VIDEO_MAX_FRAME; i++) {
			if (NULL == q->bufs[i])
				continue;

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

			q->ops->buf_release(q,q->bufs[i]);

			q->bufs[i]->map   = NULL;
			q->bufs[i]->baddr = 0;
		}
		mutex_unlock(&q->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_pci_sg_memory
 */

static void *__videobuf_alloc(size_t size)
{
	struct videbuf_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 videbuf_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 videbuf_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 = kmalloc(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 videbuf_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 videbuf_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 videbuf_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 videbuf_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
	36	static int debug = 0;
	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) \
	44	printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg)
	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
	54	dprintk(2,"vm_open %p [count=%d,vma=%08lx-%08lx]\n",map,
	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;
	66
	67	dprintk(2,"vm_close %p [count=%d,vma=%08lx-%08lx]\n",map,
	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);
	73	mutex_lock(&q->lock);
	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 MCC	80
	81	q->ops->buf_release(q,q->bufs[i]);
	82
851c0c96	83	q->bufs[i]->map = NULL;
87b9ad07	84	q->bufs[i]->baddr = 0;
87b9ad07 MCC	85	}
	86	mutex_unlock(&q->lock);
	87	kfree(map);
	88	}
	89	return;
	90	}
	91
	92	static struct vm_operations_struct videobuf_vm_ops =
	93	{
	94	.open = videobuf_vm_open,
	95	.close = videobuf_vm_close,
	96	};
	97
	98	/* ---------------------------------------------------------------------
	99	* vmalloc handlers for the generic methods
	100	*/
	101
	102	/* Allocated area consists on 3 parts:
	103	struct video_buffer
	104	struct <driver>_buffer (cx88_buffer, saa7134_buf, ...)
	105	struct videobuf_pci_sg_memory
	106	*/
	107
	108	static void *__videobuf_alloc(size_t size)
	109	{
	110	struct videbuf_vmalloc_memory *mem;
	111	struct videobuf_buffer *vb;
	112
	113	vb = kzalloc(size+sizeof(*mem),GFP_KERNEL);
	114
	115	mem = vb->priv = ((char *)vb)+size;
	116	mem->magic=MAGIC_VMAL_MEM;
	117
	118	dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
	119	__FUNCTION__,vb,(long)sizeof(vb),(long)size-sizeof(vb),
	120	mem,(long)sizeof(*mem));
	121
	122	return vb;
	123	}
	124
	125	static int __videobuf_iolock (struct videobuf_queue* q,
	126	struct videobuf_buffer *vb,
	127	struct v4l2_framebuffer *fbuf)
	128	{
	129	int pages;
	130
	131	struct videbuf_vmalloc_memory *mem=vb->priv;
	132
	133
	134	BUG_ON(!mem);
	135
	136	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	137
87b9ad07 MCC	138	pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
	139
	140	/* Currently, doesn't support V4L2_MEMORY_OVERLAY */
	141	if ((vb->memory != V4L2_MEMORY_MMAP) &&
	142	(vb->memory != V4L2_MEMORY_USERPTR) ) {
	143	printk(KERN_ERR "Method currently unsupported.\n");
	144	return -EINVAL;
	145	}
	146
	147	/* FIXME: should be tested with kernel mmap mem */
	148	mem->vmalloc=vmalloc_user (PAGE_ALIGN(vb->size));
	149	if (NULL == mem->vmalloc) {
e78dcf55	150	printk(KERN_ERR "vmalloc (%d pages) failed\n",pages);
87b9ad07 MCC	151	return -ENOMEM;
	152	}
	153
	154	dprintk(1,"vmalloc is at addr 0x%08lx, size=%d\n",
	155	(unsigned long)mem->vmalloc,
	156	pages << PAGE_SHIFT);
	157
	158	/* It seems that some kernel versions need to do remap after
	159	the mmap() call
	160	*/
	161	if (mem->vma) {
	162	int retval=remap_vmalloc_range(mem->vma, mem->vmalloc,0);
	163	kfree(mem->vma);
	164	mem->vma=NULL;
	165	if (retval<0) {
	166	dprintk(1,"mmap app bug: remap_vmalloc_range area %p error %d\n",
	167	mem->vmalloc,retval);
	168	return retval;
	169	}
	170	}
	171
	172	return 0;
	173	}
	174
	175	static int __videobuf_sync(struct videobuf_queue *q,
	176	struct videobuf_buffer *buf)
	177	{
	178	return 0;
	179	}
	180
	181	static int __videobuf_mmap_free(struct videobuf_queue *q)
	182	{
	183	unsigned int i;
	184
	185	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
	186	if (q->bufs[i]) {
851c0c96	187	if (q->bufs[i]->map)
87b9ad07 MCC	188	return -EBUSY;
	189	}
	190	}
	191
	192	return 0;
	193	}
	194
	195	static int __videobuf_mmap_mapper(struct videobuf_queue *q,
	196	struct vm_area_struct *vma)
	197	{
	198	struct videbuf_vmalloc_memory *mem;
	199	struct videobuf_mapping *map;
	200	unsigned int first;
	201	int retval;
	202	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
	203
	204	if (! (vma->vm_flags & VM_WRITE) \|\| ! (vma->vm_flags & VM_SHARED))
	205	return -EINVAL;
	206
	207	/* look for first buffer to map */
	208	for (first = 0; first < VIDEO_MAX_FRAME; first++) {
	209	if (NULL == q->bufs[first])
	210	continue;
	211
	212	if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
	213	continue;
	214	if (q->bufs[first]->boff == offset)
	215	break;
	216	}
	217	if (VIDEO_MAX_FRAME == first) {
	218	dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n",
	219	(vma->vm_pgoff << PAGE_SHIFT));
	220	return -EINVAL;
	221	}
87b9ad07 MCC	222
87b9ad07 MCC	223	/* create mapping + update buffer list */
851c0c96	224	map = q->bufs[first]->map = kmalloc(sizeof(struct videobuf_mapping),GFP_KERNEL);
87b9ad07 MCC	225	if (NULL == map)
	226	return -ENOMEM;
	227
	228	map->start = vma->vm_start;
	229	map->end = vma->vm_end;
	230	map->q = q;
	231
	232	q->bufs[first]->baddr = vma->vm_start;
	233
	234	vma->vm_ops = &videobuf_vm_ops;
	235	vma->vm_flags \|= VM_DONTEXPAND \| VM_RESERVED;
	236	vma->vm_private_data = map;
	237
851c0c96 MCC	238	mem=q->bufs[first]->priv;
	239	BUG_ON (!mem);
	240	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	241
87b9ad07 MCC	242	/* Try to remap memory */
	243	retval=remap_vmalloc_range(vma, mem->vmalloc,0);
	244	if (retval<0) {
	245	dprintk(1,"mmap: postponing remap_vmalloc_range\n");
851c0c96	246
87b9ad07 MCC	247	mem->vma=kmalloc(sizeof(*vma),GFP_KERNEL);
	248	if (!mem->vma) {
	249	kfree(map);
851c0c96	250	q->bufs[first]->map=NULL;
87b9ad07 MCC	251	return -ENOMEM;
	252	}
	253	memcpy(mem->vma,vma,sizeof(*vma));
	254	}
	255
	256	dprintk(1,"mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
	257	map,q,vma->vm_start,vma->vm_end,
	258	(long int) q->bufs[first]->bsize,
	259	vma->vm_pgoff,first);
	260
	261	videobuf_vm_open(vma);
	262
	263	return (0);
	264	}
	265
87b9ad07 MCC	266	static int __videobuf_copy_to_user ( struct videobuf_queue *q,
	267	char __user *data, size_t count,
	268	int nonblocking )
	269	{
	270	struct videbuf_vmalloc_memory *mem=q->read_buf->priv;
	271	BUG_ON (!mem);
	272	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	273
	274	BUG_ON (!mem->vmalloc);
	275
	276	/* copy to userspace */
	277	if (count > q->read_buf->size - q->read_off)
	278	count = q->read_buf->size - q->read_off;
	279
	280	if (copy_to_user(data, mem->vmalloc+q->read_off, count))
	281	return -EFAULT;
	282
	283	return count;
	284	}
	285
	286	static int __videobuf_copy_stream ( struct videobuf_queue *q,
	287	char __user *data, size_t count, size_t pos,
	288	int vbihack, int nonblocking )
	289	{
	290	unsigned int *fc;
	291	struct videbuf_vmalloc_memory *mem=q->read_buf->priv;
	292	BUG_ON (!mem);
	293	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	294
	295	if (vbihack) {
	296	/* dirty, undocumented hack -- pass the frame counter
	297	* within the last four bytes of each vbi data block.
	298	* We need that one to maintain backward compatibility
	299	* to all vbi decoding software out there ... */
	300	fc = (unsigned int*)mem->vmalloc;
	301	fc += (q->read_buf->size>>2) -1;
	302	*fc = q->read_buf->field_count >> 1;
	303	dprintk(1,"vbihack: %d\n",*fc);
	304	}
	305
	306	/* copy stuff using the common method */
	307	count = __videobuf_copy_to_user (q,data,count,nonblocking);
	308
	309	if ( (count==-EFAULT) && (0 == pos) )
	310	return -EFAULT;
	311
	312	return count;
	313	}
	314
	315	static struct videobuf_qtype_ops qops = {
	316	.magic = MAGIC_QTYPE_OPS,
	317
	318	.alloc = __videobuf_alloc,
	319	.iolock = __videobuf_iolock,
	320	.sync = __videobuf_sync,
	321	.mmap_free = __videobuf_mmap_free,
	322	.mmap_mapper = __videobuf_mmap_mapper,
13bcd5d0	323	.video_copy_to_user = __videobuf_copy_to_user,
87b9ad07 MCC	324	.copy_stream = __videobuf_copy_stream,
	325	};
	326
	327	void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
	328	struct videobuf_queue_ops *ops,
	329	void *dev,
	330	spinlock_t *irqlock,
	331	enum v4l2_buf_type type,
	332	enum v4l2_field field,
	333	unsigned int msize,
	334	void *priv)
	335	{
d4cae5a5 MCC	336	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
d4cae5a5 MCC	337	priv, &qops);
87b9ad07 MCC	338	}
	339
	340	EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init);
	341
	342	void videobuf_to_vmalloc (struct videobuf_buffer buf)
	343	{
	344	struct videbuf_vmalloc_memory *mem=buf->priv;
	345	BUG_ON (!mem);
	346	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	347
	348	return mem->vmalloc;
	349	}
	350	EXPORT_SYMBOL_GPL(videobuf_to_vmalloc);
	351
	352	void videobuf_vmalloc_free (struct videobuf_buffer *buf)
	353	{
	354	struct videbuf_vmalloc_memory *mem=buf->priv;
	355	BUG_ON (!mem);
	356
	357	MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
	358
	359	vfree(mem->vmalloc);
c520a497	360	mem->vmalloc=NULL;
87b9ad07 MCC	361
	362	return;
	363	}
	364	EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);
	365
	366	/*
	367	* Local variables:
	368	* c-basic-offset: 8
	369	* End:
	370	*/