summaryrefslogtreecommitdiff
path: root/include/media/video-buf.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/media/video-buf.h')
-rw-r--r--include/media/video-buf.h289
1 files changed, 0 insertions, 289 deletions
diff --git a/include/media/video-buf.h b/include/media/video-buf.h
deleted file mode 100644
index d6f079476db3..000000000000
--- a/include/media/video-buf.h
+++ /dev/null
@@ -1,289 +0,0 @@
-/*
- *
- * generic helper functions for video4linux capture buffers, to handle
- * memory management and PCI DMA.
- * Right now, bttv, saa7134, saa7146 and cx88 use it.
- *
- * 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.
- *
- * device specific map/unmap/sync stuff now are mapped as file operations
- * to allow its usage by USB and virtual devices.
- *
- * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org>
- * (c) 2006 Mauro Carvalho Chehab, <mchehab@infradead.org>
- * (c) 2006 Ted Walther and John Sokol
- *
- * 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 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/videodev2.h>
-#include <linux/poll.h>
-
-#define UNSET (-1U)
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Return a scatterlist for some page-aligned vmalloc()'ed memory
- * block (NULL on errors). Memory for the scatterlist is allocated
- * using kmalloc. The caller must free the memory.
- */
-struct scatterlist* videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages);
-
-/*
- * Return a scatterlist for a an array of userpages (NULL on errors).
- * Memory for the scatterlist is allocated using kmalloc. The caller
- * must free the memory.
- */
-struct scatterlist* videobuf_pages_to_sg(struct page **pages, int nr_pages,
- int offset);
-
-struct videobuf_buffer;
-struct videobuf_queue;
-
-/* --------------------------------------------------------------------- */
-
-/*
- * A small set of helper functions to manage buffers (both userland
- * and kernel) for DMA.
- *
- * videobuf_dma_init_*()
- * creates a buffer. The userland version takes a userspace
- * pointer + length. The kernel version just wants the size and
- * does memory allocation too using vmalloc_32().
- *
- * videobuf_dma_*()
- * see Documentation/DMA-mapping.txt, these functions to
- * basically the same. The map function does also build a
- * scatterlist for the buffer (and unmap frees it ...)
- *
- * videobuf_dma_free()
- * no comment ...
- *
- */
-
-struct videobuf_dmabuf {
- u32 magic;
-
- /* for userland buffer */
- int offset;
- struct page **pages;
-
- /* for kernel buffers */
- void *vmalloc;
-
- /* Stores the userspace pointer to vmalloc area */
- void *varea;
-
- /* for overlay buffers (pci-pci dma) */
- dma_addr_t bus_addr;
-
- /* common */
- struct scatterlist *sglist;
- int sglen;
- int nr_pages;
- int direction;
-};
-
-void videobuf_dma_init(struct videobuf_dmabuf *dma);
-int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction,
- unsigned long data, unsigned long size);
-int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction,
- int nr_pages);
-int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction,
- dma_addr_t addr, int nr_pages);
-int videobuf_dma_free(struct videobuf_dmabuf *dma);
-
-int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma);
-int videobuf_dma_sync(struct videobuf_queue* q,struct videobuf_dmabuf *dma);
-int videobuf_dma_unmap(struct videobuf_queue* q,struct videobuf_dmabuf *dma);
-
- /*FIXME: these variants are used only on *-alsa code, where videobuf is
- * used without queue
- */
-int videobuf_pci_dma_map(struct pci_dev *pci,struct videobuf_dmabuf *dma);
-int videobuf_pci_dma_unmap(struct pci_dev *pci,struct videobuf_dmabuf *dma);
-
-/* --------------------------------------------------------------------- */
-
-/*
- * A small set of helper functions to manage video4linux buffers.
- *
- * struct videobuf_buffer holds the data structures used by the helper
- * functions, additionally some commonly used fields for v4l buffers
- * (width, height, lists, waitqueue) are in there. That struct should
- * be used as first element in the drivers buffer struct.
- *
- * about the mmap helpers (videobuf_mmap_*):
- *
- * The mmaper function allows to map any subset of contingous buffers.
- * This includes one mmap() call for all buffers (which the original
- * video4linux API uses) as well as one mmap() for every single buffer
- * (which v4l2 uses).
- *
- * If there is a valid mapping for a buffer, buffer->baddr/bsize holds
- * userspace address + size which can be feeded into the
- * videobuf_dma_init_user function listed above.
- *
- */
-
-struct videobuf_mapping {
- unsigned int count;
- unsigned long start;
- unsigned long end;
- struct videobuf_queue *q;
-};
-
-enum videobuf_state {
- STATE_NEEDS_INIT = 0,
- STATE_PREPARED = 1,
- STATE_QUEUED = 2,
- STATE_ACTIVE = 3,
- STATE_DONE = 4,
- STATE_ERROR = 5,
- STATE_IDLE = 6,
-};
-
-struct videobuf_buffer {
- unsigned int i;
- u32 magic;
-
- /* info about the buffer */
- unsigned int width;
- unsigned int height;
- unsigned int bytesperline; /* use only if != 0 */
- unsigned long size;
- unsigned int input;
- enum v4l2_field field;
- enum videobuf_state state;
- struct videobuf_dmabuf dma;
- struct list_head stream; /* QBUF/DQBUF list */
-
- /* for mmap'ed buffers */
- enum v4l2_memory memory;
- size_t boff; /* buffer offset (mmap + overlay) */
- size_t bsize; /* buffer size */
- unsigned long baddr; /* buffer addr (userland ptr!) */
- struct videobuf_mapping *map;
-
- /* touched by irq handler */
- struct list_head queue;
- wait_queue_head_t done;
- unsigned int field_count;
- struct timeval ts;
-};
-
-typedef int (vb_map_sg_t)(void *dev,struct scatterlist *sglist,int nr_pages,
- int direction);
-
-
-struct videobuf_queue_ops {
- int (*buf_setup)(struct videobuf_queue *q,
- unsigned int *count, unsigned int *size);
- int (*buf_prepare)(struct videobuf_queue *q,
- struct videobuf_buffer *vb,
- enum v4l2_field field);
- void (*buf_queue)(struct videobuf_queue *q,
- struct videobuf_buffer *vb);
- void (*buf_release)(struct videobuf_queue *q,
- struct videobuf_buffer *vb);
-
- /* Helper operations - device dependent.
- * If null, videobuf_init defaults all to PCI handling
- */
-
- vb_map_sg_t *vb_map_sg;
- vb_map_sg_t *vb_dma_sync_sg;
- vb_map_sg_t *vb_unmap_sg;
-};
-
-struct videobuf_queue {
- struct mutex lock;
- spinlock_t *irqlock;
- void *dev; /* on pci, points to struct pci_dev */
-
- enum v4l2_buf_type type;
- unsigned int inputs; /* for V4L2_BUF_FLAG_INPUT */
- unsigned int msize;
- enum v4l2_field field;
- enum v4l2_field last; /* for field=V4L2_FIELD_ALTERNATE */
- struct videobuf_buffer *bufs[VIDEO_MAX_FRAME];
- struct videobuf_queue_ops *ops;
-
- /* capture via mmap() + ioctl(QBUF/DQBUF) */
- unsigned int streaming;
- struct list_head stream;
-
- /* capture via read() */
- unsigned int reading;
- unsigned int read_off;
- struct videobuf_buffer *read_buf;
-
- /* driver private data */
- void *priv_data;
-};
-
-void* videobuf_alloc(unsigned int size);
-int videobuf_waiton(struct videobuf_buffer *vb, int non_blocking, int intr);
-int videobuf_iolock(struct videobuf_queue* q, struct videobuf_buffer *vb,
- struct v4l2_framebuffer *fbuf);
-
-/* Maps fops to PCI stuff */
-void videobuf_queue_pci(struct videobuf_queue* q);
-
-void videobuf_queue_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);
-int videobuf_queue_is_busy(struct videobuf_queue *q);
-void videobuf_queue_cancel(struct videobuf_queue *q);
-
-enum v4l2_field videobuf_next_field(struct videobuf_queue *q);
-void videobuf_status(struct v4l2_buffer *b, struct videobuf_buffer *vb,
- enum v4l2_buf_type type);
-int videobuf_reqbufs(struct videobuf_queue *q,
- struct v4l2_requestbuffers *req);
-int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b);
-int videobuf_qbuf(struct videobuf_queue *q,
- struct v4l2_buffer *b);
-int videobuf_dqbuf(struct videobuf_queue *q,
- struct v4l2_buffer *b, int nonblocking);
-int videobuf_streamon(struct videobuf_queue *q);
-int videobuf_streamoff(struct videobuf_queue *q);
-
-int videobuf_read_start(struct videobuf_queue *q);
-void videobuf_read_stop(struct videobuf_queue *q);
-ssize_t videobuf_read_stream(struct videobuf_queue *q,
- char __user *data, size_t count, loff_t *ppos,
- int vbihack, int nonblocking);
-ssize_t videobuf_read_one(struct videobuf_queue *q,
- char __user *data, size_t count, loff_t *ppos,
- int nonblocking);
-unsigned int videobuf_poll_stream(struct file *file,
- struct videobuf_queue *q,
- poll_table *wait);
-
-int videobuf_mmap_setup(struct videobuf_queue *q,
- unsigned int bcount, unsigned int bsize,
- enum v4l2_memory memory);
-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:
- */
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-15 16:04:39 +0000