#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(); }
+#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_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)
+#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)
+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);
+ dprintk(2, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", map,
+ map->count, vma->vm_start, vma->vm_end);
map->count++;
}
struct videobuf_queue *q = map->q;
int i;
- dprintk(2,"vm_close %p [count=%u,vma=%08lx-%08lx]\n", map,
+ dprintk(2, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", map,
map->count, vma->vm_start, vma->vm_end);
map->count--;
return;
}
-static const struct vm_operations_struct videobuf_vm_ops =
-{
+static const struct vm_operations_struct videobuf_vm_ops = {
.open = videobuf_vm_open,
.close = videobuf_vm_close,
};
struct videobuf_dma_sg_memory
*/
-static void *__videobuf_alloc(size_t size)
+static struct videobuf_buffer *__videobuf_alloc(size_t size)
{
struct videobuf_vmalloc_memory *mem;
struct videobuf_buffer *vb;
- vb = kzalloc(size+sizeof(*mem),GFP_KERNEL);
+ vb = kzalloc(size + sizeof(*mem), GFP_KERNEL);
if (!vb)
return vb;
- mem = vb->priv = ((char *)vb)+size;
- mem->magic=MAGIC_VMAL_MEM;
+ mem = vb->priv = ((char *)vb) + size;
+ mem->magic = MAGIC_VMAL_MEM;
- dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
- __func__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb),
- mem,(long)sizeof(*mem));
+ dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
+ __func__, 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)
+static int __videobuf_iolock(struct videobuf_queue *q,
+ struct videobuf_buffer *vb,
+ struct v4l2_framebuffer *fbuf)
{
struct videobuf_vmalloc_memory *mem = vb->priv;
int pages;
dprintk(1, "%s memory method USERPTR\n", __func__);
-#if 1
if (vb->baddr) {
printk(KERN_ERR "USERPTR is currently not supported\n");
return -EINVAL;
}
-#endif
/* The only USERPTR currently supported is the one needed for
- read() method.
+ * read() method.
*/
mem->vmalloc = vmalloc_user(pages);
/* Try to remap memory */
rc = remap_vmalloc_range(mem->vma, (void *)vb->baddr, 0);
if (rc < 0) {
- printk(KERN_ERR "mmap: remap failed with error %d. ", rc);
+ printk(KERN_ERR "mmap: remap failed with error %d", rc);
return -ENOMEM;
}
#endif
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;
-
- dprintk(1, "%s\n", __func__);
- 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_buffer *buf,
+ struct vm_area_struct *vma)
{
struct videobuf_vmalloc_memory *mem;
struct videobuf_mapping *map;
- unsigned int first;
int retval, pages;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
dprintk(1, "%s\n", __func__);
- 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 = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
if (NULL == map)
return -ENOMEM;
- q->bufs[first]->map = map;
+ buf->map = map;
map->start = vma->vm_start;
map->end = vma->vm_end;
map->q = q;
- q->bufs[first]->baddr = vma->vm_start;
+ buf->baddr = vma->vm_start;
- mem = q->bufs[first]->priv;
+ mem = buf->priv;
BUG_ON(!mem);
MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
goto error;
}
- dprintk(1, "vmalloc is at addr %p (%d pages)\n",
- mem->vmalloc, pages);
+ dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vmalloc, pages);
/* Try to remap memory */
retval = remap_vmalloc_range(vma, mem->vmalloc, 0);
vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
vma->vm_private_data = map;
- dprintk(1,"mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
+ 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);
+ (long int)buf->bsize,
+ vma->vm_pgoff, buf->i);
videobuf_vm_open(vma);
return -ENOMEM;
}
-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,
- .vmalloc = videobuf_to_vmalloc,
+ .vaddr = videobuf_to_vmalloc,
};
-void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
+void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
const struct videobuf_queue_ops *ops,
struct device *dev,
spinlock_t *irqlock,
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)
+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);
+ 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)
+void videobuf_vmalloc_free(struct videobuf_buffer *buf)
{
struct videobuf_vmalloc_memory *mem = buf->priv;
}
EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);
-/*
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
git.openpandora.org / pandora-kernel.git / blobdiff