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path: root/include/media/videobuf-core.h
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* V4L/DVB: videobuf: rename videobuf_alloc to videobuf_alloc_vbPawel Osciak2010-08-02
| | | | | | | | | | | | These functions allocate videobuf_buffer structures only. Renaming in order to prevent confusion with functions allocating actual video buffer memory. Rename the functions in videobuf-core.h videobuf-dma-sg.c as well. Signed-off-by: Pawel Osciak <p.osciak@samsung.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: add videobuf_buffer *buf as argument to mmap_mapperHans Verkuil2010-05-19
| | | | | | | | | | | | mmap_mapper should operate on a buffer, not on a complete queue. So let the videobuf-core find the correct buffer instead of duplicating that code in each mmap_mapper implementation. The dma-sg implementation has backwards compatibility code for handling the V4L1_COMPAT layer. This code is now under the v4L1_COMPAT config option. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: move video_copy_to_user and copy_stream to coreHans Verkuil2010-05-19
| | | | | | | | | | The video_copy_to_user and copy_stream ops are almost identical for all videobuf memtype variants. All that is needed is to use the new vaddr op and these functions can be moved into the core, ensuring we have just one single implementation instead of three. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: rename videobuf_queue_to_vmalloc to ↵Hans Verkuil2010-05-19
| | | | | | | | | | videobuf_queue_to_vaddr Ths function returns the virtual kernel address of the buffer and has nothing to do with allocation. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: rename .vmalloc to .vaddrHans Verkuil2010-05-19
| | | | | | | | | Rename the .vmalloc op in struct videobuf_qtype_ops to .vaddr. This op returns the virtual kernel address of a buffer. vaddr is a lot less confusing than vmalloc since this callback does do any allocations. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: use struct videobuf_buffer * instead of void * for ↵Hans Verkuil2010-05-19
| | | | | | | | | | videobuf_alloc videobuf_alloc() returned a void *. Change to struct videobuf_buffer * to get better type checking. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: remove unused is_mmapped fieldHans Verkuil2010-05-19
| | | | | | | Thanks to Pawel Osciak for noticing this. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: remove mmap_free callbackHans Verkuil2010-05-19
| | | | | | | | | | | Remove the mmap_free callback from struct videobuf_qtype_ops. All implementations of this callback do the same trivial check: return -EBUSY if any buffer is mmapped. That can also be tested in the videobuf core. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l videobuf: remove unused mmap callbackHans Verkuil2010-05-19
| | | | | | | | The mmap callback in struct videobuf_qtype_ops is never used. Remove. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l: videobuf: code cleanupPawel Osciak2010-05-17
| | | | | | | | Make videobuf pass checkpatch; minor code cleanups. Signed-off-by: Pawel Osciak <p.osciak@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13377): make struct videobuf_queue_ops constantJonathan Corbet2009-12-05
| | | | | | | | | | The videobuf_queue_ops function vector is not declared constant, but there's no need for the videobuf layer to ever change it. Make it const so that videobuf users can make their operations const without warnings. Signed-off-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10908): videobuf-core: also needs a minimal subset of V4L1 headerMauro Carvalho Chehab2009-03-30
| | | | Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* Fix a deadlock in the bttv driverArjan van de Ven2008-05-20
| | | | | | | | | | | | | | | | | | | | | | vidiocgmbuf() does this: mutex_lock(&fh->cap.vb_lock); retval = videobuf_mmap_setup(&fh->cap, gbuffers, gbufsize, V4L2_MEMORY_MMAP); and videobuf_mmap_setup() then just does mutex_lock(&q->vb_lock); ret = __videobuf_mmap_setup(q, bcount, bsize, memory); mutex_unlock(&q->vb_lock); which is an obvious double-take deadlock. This patch fixes this by having vidiocgmbuf() just call the __videobuf_mmap_setup function instead. Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Reported-by: Koos Vriezen <koos.vriezen@gmail.com> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* V4L/DVB (7566): videobuf-dvb: allow its usage with videobuf-vmallocMauro Carvalho Chehab2008-04-24
| | | | | | | | videobuf-dvb were still using a function that were videobuf-dma-sg dependent. This patch creates a generic handler for this function. This way, videobuf-dvb can now work with all videobuf implementations. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7493): videobuf: Avoid deadlock with QBUF and bring up to spec for ↵Brandon Philips2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | empty queue Add a waitqueue to wait on when there are no buffers in the buffer queue. DQBUF waits on this queue without holding vb_lock to allow a QBUF to happen. Once a buffer has been queued we recheck that the queue is still streaming and wait on the new buffer's waitqueue while holding the vb_lock. The driver should come along in a timely manner and put the buffer into its next state finishing the DQBUF. By implementing this waitqueue it also brings the videobuf DQBUF up to spec and it now blocks on O_NONBLOCK even when no buffers have been queued via QBUF: "By default VIDIOC_DQBUF blocks when no buffer is in the outgoing queue." - V4L2 spec Signed-off-by: Brandon Philips <bphilips@suse.de> CC: Trent Piepho <xyzzy@speakeasy.org> CC: Carl Karsten <carl@personnelware.com> CC: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7376): Improve compile-time type-checking in videobufGuennadi Liakhovetski2008-04-24
| | | | | | | | | Make the dev member of the struct videobuf_queue of type "struct device *" to avoid future problems. Also change the prototype of the videobuf_queue_core_init() function. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7121): Renames videobuf lock to vb_lockMauro Carvalho Chehab2008-02-18
| | | | | | | This helps to identify where vb_lock is being used, and find missusages of the locks. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6997): Replace a very dirty hack on videobuf for a clean wait_eventMauro Carvalho Chehab2008-01-25
| | | | | | | | | | | | | In order to videobuf_iolock to work, mmap_mapper should be called first. Otherwise, an OOPS is generated. On some cases, .mmap file handler used to took some time to be called. On those situations, mmap_mmapper() were called after iolock. This patch properly waits for mmap_mapper to be called, otherwise generating an error. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6603): V4L: videobuf: convert streaming and reading to bitfieldsBrandon Philips2008-01-25
| | | | | Signed-off-by: Brandon Philips <bphilips@suse.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6600): V4L: videobuf: don't chew up namespace STATE_.*, convert to ↵Brandon Philips2008-01-25
| | | | | | | | | | | | | | | VIDEOBUF_ s/STATE_NEEDS_INIT/VIDEOBUF_NEEDS_INIT/g s/STATE_PREPARED/VIDEOBUF_PREPARED/g s/STATE_QUEUED/VIDEOBUF_QUEUED/g s/STATE_ACTIVE/VIDEOBUF_ACTIVE/g s/STATE_DONE/VIDEOBUF_DONE/g s/STATE_ERROR/VIDEOBUF_ERROR/g s/STATE_IDLE/VIDEOBUF_IDLE/g Signed-off-by: Brandon Philips <bphilips@suse.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6601): V4L: videobuf-core locking fixes and commentsBrandon Philips2007-12-11
| | | | | | | | | | | | | | | - Add comments to functions that require that caller hold q->lock - Add __videobuf_mmap_free that doesn't hold q->lock for use within videobuf - Add locking to videobuf_mmap_free - Fix linux/drivers/media/common/saa7146_video.c which was holding lock around videobuf_read_stop - Add locking to functions that operate on a queue - Add videobuf_stop to take care of stopping in both the read and stream case TODO: bttv still has an unsafe call to videobuf_queue_is_busy Signed-off-by: Brandon Philips <bphilips@suse.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* v4l: copy_to_user() is not a good method nameAl Viro2007-10-13
| | | | | | | | Breaks on any target that has copy_to_user() defined as a non-trivial macro. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* V4L/DVB (6292): videobuf_core init always require callback implementationMauro Carvalho Chehab2007-10-09
| | | | | | | | | | | In the past, videobuf_queue_init were used to initialize PCI DMA videobuffers. This patch renames it, to avoid confusion with the previous kernel API, doing: s/videobuf_queue_init/void videobuf_queue_core_init/ Also, the operations is now part of the function parameter. The function will also add a test if this is defined, otherwise producing BUG. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6290): remove videobuf_set_pci_opsMauro Carvalho Chehab2007-10-09
| | | | | | | | | | Before the videobuf redesign, a procedure for re-using videobuf without PCI scatter/gather where provided by changing the pci-dependent operations by other operations. With the newer approach, those methods are obsolete and can safelly be removed. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (6266): videobuf cleanup: mmap check is common to all videobuf. Make ↵Mauro Carvalho Chehab2007-10-09
| | | | | | | | it at core Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org> http://thread.gmane.org/gmane.comp.video.video4linux/34978/focus=34981 Reviewed-by: Ricardo Cerqueira <v4l@cerqueira.org>
* V4L/DVB (6251): Replace video-buf to a more generic approachMauro Carvalho Chehab2007-10-09
video-buf currently does two different tasks: - Manages video buffers with a common code that allows implementing all the V4L2 different modes of buffering; - Controls memory allocations While the first task is generic, the second were written to support PCI DMA Scatter/Gather needs. The original approach can't even work for those video capture hardware that don't support scatter/gather. I did one approach to make it more generic. While the approach worked fine for vivi driver, it were not generic enough to handle USB needs. This patch creates two different modules, one containing the generic video buffer handling (videobuf-core) and another with PCI DMA S/G. After this patch, it would be simpler to write an USB video-buf and a non-SG DMA module. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org> http://thread.gmane.org/gmane.comp.video.video4linux/34978/focus=34981 Reviewed-by: Ricardo Cerqueira <v4l@cerqueira.org>
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