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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [media/] [video/] [videobuf-vmalloc.c] - Blame information for rev 62

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/*
 * 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=%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->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 = 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 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:
 */

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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [media/] [video/] [videobuf-vmalloc.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
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=%u,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;`
65			`int i;`
66
67			`dprintk(2,"vm_close %p [count=%u,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;`
77
78			`if (q->bufs[i]->map != map)`
79			`continue;`
80
81			`q->ops->buf_release(q,q->bufs[i]);`
82
83			`q->bufs[i]->map = NULL;`
84			`q->bufs[i]->baddr = 0;`
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
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) {`
150			`printk(KERN_ERR "vmalloc (%d pages) failed\n",pages);`
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]) {`
187			`if (q->bufs[i]->map)`
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			`}`
222
223			`/* create mapping + update buffer list */`
224			`map = q->bufs[first]->map = kzalloc(sizeof(struct videobuf_mapping),GFP_KERNEL);`
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
238			`mem=q->bufs[first]->priv;`
239			`BUG_ON (!mem);`
240			`MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);`
241
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");`
246
247			`mem->vma=kmalloc(sizeof(*vma),GFP_KERNEL);`
248			`if (!mem->vma) {`
249			`kfree(map);`
250			`q->bufs[first]->map=NULL;`
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
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,`
323			`.video_copy_to_user = __videobuf_copy_to_user,`
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			`{`
336			`videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,`
337			`priv, &qops);`
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);`
360			`mem->vmalloc=NULL;`
361
362			`return;`
363			`}`
364			`EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);`
365
366			`/*`
367			`* Local variables:`
368			`* c-basic-offset: 8`
369			`* End:`
370			`*/`