Divide videobuf2-core into core part and v4l2-specific part
- core part: videobuf2 core related with buffer management & memory allocation
- v4l2-specific part: v4l2-specific stuff
Signed-off-by: Junghak Sung <jh1009.sung@xxxxxxxxxxx>
Signed-off-by: Geunyoung Kim <nenggun.kim@xxxxxxxxxxx>
Acked-by: Seung-Woo Kim <sw0312.kim@xxxxxxxxxxx>
Acked-by: Inki Dae <inki.dae@xxxxxxxxxxx>
---
drivers/input/touchscreen/sur40.c | 4 +-
drivers/media/dvb-frontends/rtl2832_sdr.c | 2 +-
drivers/media/pci/cx23885/cx23885-417.c | 2 +-
drivers/media/pci/cx23885/cx23885-dvb.c | 2 +-
drivers/media/pci/cx23885/cx23885-vbi.c | 2 +-
drivers/media/pci/cx23885/cx23885-video.c | 2 +-
drivers/media/pci/cx25821/cx25821-video.c | 3 +-
drivers/media/pci/cx25821/cx25821.h | 1 +
drivers/media/pci/cx88/cx88-blackbird.c | 2 +-
drivers/media/pci/cx88/cx88-dvb.c | 2 +-
drivers/media/pci/cx88/cx88-mpeg.c | 2 +-
drivers/media/pci/cx88/cx88-vbi.c | 2 +-
drivers/media/pci/cx88/cx88-video.c | 4 +-
drivers/media/pci/dt3155/dt3155.c | 4 +-
drivers/media/pci/saa7134/saa7134-ts.c | 2 +-
drivers/media/pci/saa7134/saa7134-vbi.c | 2 +-
drivers/media/pci/saa7134/saa7134-video.c | 2 +-
drivers/media/pci/saa7134/saa7134.h | 3 +-
drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c | 3 +-
drivers/media/pci/solo6x10/solo6x10-v4l2.c | 2 +-
drivers/media/pci/sta2x11/sta2x11_vip.c | 2 +-
drivers/media/pci/tw68/tw68-video.c | 3 +-
drivers/media/platform/blackfin/bfin_capture.c | 4 +-
drivers/media/platform/coda/coda-common.c | 3 +-
drivers/media/platform/davinci/vpbe_display.c | 3 +-
drivers/media/platform/davinci/vpif_capture.c | 4 +-
drivers/media/platform/davinci/vpif_display.c | 4 +-
drivers/media/platform/exynos-gsc/gsc-m2m.c | 3 +-
drivers/media/platform/exynos4-is/fimc-capture.c | 3 +-
drivers/media/platform/exynos4-is/fimc-isp-video.c | 3 +-
drivers/media/platform/exynos4-is/fimc-lite.c | 3 +-
drivers/media/platform/exynos4-is/fimc-m2m.c | 2 +-
drivers/media/platform/m2m-deinterlace.c | 3 +-
drivers/media/platform/marvell-ccic/mcam-core.c | 7 +-
drivers/media/platform/mx2_emmaprp.c | 3 +-
drivers/media/platform/omap3isp/ispvideo.c | 3 +-
drivers/media/platform/s3c-camif/camif-capture.c | 3 +-
drivers/media/platform/s5p-g2d/g2d.c | 2 +-
drivers/media/platform/s5p-jpeg/jpeg-core.c | 3 +-
drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 2 +-
drivers/media/platform/s5p-mfc/s5p_mfc_enc.c | 3 +-
drivers/media/platform/s5p-tv/mixer_video.c | 2 +-
drivers/media/platform/sh_veu.c | 4 +-
drivers/media/platform/soc_camera/atmel-isi.c | 2 +-
drivers/media/platform/soc_camera/mx2_camera.c | 3 +-
drivers/media/platform/soc_camera/mx3_camera.c | 4 +-
drivers/media/platform/soc_camera/rcar_vin.c | 4 +-
.../platform/soc_camera/sh_mobile_ceu_camera.c | 4 +-
drivers/media/platform/ti-vpe/vpe.c | 3 +-
drivers/media/platform/vim2m.c | 3 +-
drivers/media/platform/vivid/vivid-sdr-cap.c | 2 +-
drivers/media/platform/vivid/vivid-vbi-cap.c | 2 +-
drivers/media/platform/vivid/vivid-vbi-out.c | 2 +-
drivers/media/platform/vivid/vivid-vid-cap.c | 3 +-
drivers/media/platform/vivid/vivid-vid-out.c | 3 +-
drivers/media/platform/vsp1/vsp1_video.c | 3 +-
drivers/media/usb/airspy/airspy.c | 2 +-
drivers/media/usb/au0828/au0828-vbi.c | 3 +-
drivers/media/usb/au0828/au0828-video.c | 3 +-
drivers/media/usb/au0828/au0828.h | 1 +
drivers/media/usb/em28xx/em28xx-vbi.c | 3 +-
drivers/media/usb/em28xx/em28xx-video.c | 3 +-
drivers/media/usb/em28xx/em28xx.h | 1 +
drivers/media/usb/go7007/go7007-v4l2.c | 3 +-
drivers/media/usb/hackrf/hackrf.c | 2 +-
drivers/media/usb/msi2500/msi2500.c | 3 +-
drivers/media/usb/pwc/pwc-if.c | 2 +-
drivers/media/usb/pwc/pwc.h | 1 +
drivers/media/usb/s2255/s2255drv.c | 3 +-
drivers/media/usb/stk1160/stk1160-v4l.c | 2 +-
drivers/media/usb/usbtv/usbtv-video.c | 3 +-
drivers/media/usb/usbtv/usbtv.h | 1 +
drivers/media/usb/uvc/uvc_queue.c | 3 +-
drivers/media/v4l2-core/Makefile | 2 +-
drivers/media/v4l2-core/videobuf2-core.c | 1797 ++++++++++++++++
drivers/media/v4l2-core/videobuf2-dma-contig.c | 2 +-
drivers/media/v4l2-core/videobuf2-dma-sg.c | 2 +-
drivers/media/v4l2-core/videobuf2-memops.c | 2 +-
drivers/media/v4l2-core/videobuf2-v4l2.c | 2260 +++-----------------
drivers/media/v4l2-core/videobuf2-vmalloc.c | 2 +-
drivers/usb/gadget/function/uvc_queue.c | 2 +-
include/media/videobuf2-core.h | 724 +++++++
include/media/videobuf2-dma-contig.h | 2 +-
include/media/videobuf2-dma-sg.h | 2 +-
include/media/videobuf2-memops.h | 2 +-
include/media/videobuf2-v4l2.h | 509 +----
include/media/videobuf2-vmalloc.h | 2 +-
include/trace/events/v4l2.h | 3 +-
88 files changed, 2919 insertions(+), 2591 deletions(-)
create mode 100644 drivers/media/v4l2-core/videobuf2-core.c
create mode 100644 include/media/videobuf2-core.h
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 2147a90..d7ea662 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -38,6 +38,7 @@
#include <media/v4l2-device.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-sg.h>
/* read 512 bytes from endpoint 0x86 -> get header + blobs */
@@ -642,10 +643,11 @@ static void sur40_disconnect(struct usb_interface *interface)
* minimum number: many DMA engines need a minimum of 2 buffers in the
* queue and you need to have another available for userspace processing.
*/
-static int sur40_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int sur40_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ const struct v4l2_format *fmt = (const struct v4l2_format *) parg;
struct sur40_state *sur40 = vb2_get_drv_priv(q);
if (q->num_buffers + *nbuffers < 3)
diff --git a/drivers/media/dvb-frontends/rtl2832_sdr.c b/drivers/media/dvb-frontends/rtl2832_sdr.c
index c900185d..8d36149 100644
--- a/drivers/media/dvb-frontends/rtl2832_sdr.c
+++ b/drivers/media/dvb-frontends/rtl2832_sdr.c
@@ -488,7 +488,7 @@ static int rtl2832_sdr_querycap(struct file *file, void *fh,
/* Videobuf2 operations */
static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt, unsigned int *nbuffers,
+ const void *parg, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
{
struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
diff --git a/drivers/media/pci/cx23885/cx23885-417.c b/drivers/media/pci/cx23885/cx23885-417.c
index 316a322..88a3afb 100644
--- a/drivers/media/pci/cx23885/cx23885-417.c
+++ b/drivers/media/pci/cx23885/cx23885-417.c
@@ -1138,7 +1138,7 @@ static int cx23885_initialize_codec(struct cx23885_dev *dev, int startencoder)
/* ------------------------------------------------------------------ */
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/cx23885/cx23885-dvb.c b/drivers/media/pci/cx23885/cx23885-dvb.c
index 09ad512..c4307ad 100644
--- a/drivers/media/pci/cx23885/cx23885-dvb.c
+++ b/drivers/media/pci/cx23885/cx23885-dvb.c
@@ -92,7 +92,7 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
/* ------------------------------------------------------------------ */
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/cx23885/cx23885-vbi.c b/drivers/media/pci/cx23885/cx23885-vbi.c
index e84e5bd..d1fd585 100644
--- a/drivers/media/pci/cx23885/cx23885-vbi.c
+++ b/drivers/media/pci/cx23885/cx23885-vbi.c
@@ -121,7 +121,7 @@ static int cx23885_start_vbi_dma(struct cx23885_dev *dev,
/* ------------------------------------------------------------------ */
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/cx23885/cx23885-video.c b/drivers/media/pci/cx23885/cx23885-video.c
index d06fc87..d7c6729 100644
--- a/drivers/media/pci/cx23885/cx23885-video.c
+++ b/drivers/media/pci/cx23885/cx23885-video.c
@@ -315,7 +315,7 @@ static int cx23885_start_video_dma(struct cx23885_dev *dev,
return 0;
}
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/cx25821/cx25821-video.c b/drivers/media/pci/cx25821/cx25821-video.c
index af0e425..5e672f2 100644
--- a/drivers/media/pci/cx25821/cx25821-video.c
+++ b/drivers/media/pci/cx25821/cx25821-video.c
@@ -141,10 +141,11 @@ int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
return handled;
}
-static int cx25821_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int cx25821_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct cx25821_channel *chan = q->drv_priv;
unsigned size = (chan->fmt->depth * chan->width * chan->height) >> 3;
diff --git a/drivers/media/pci/cx25821/cx25821.h b/drivers/media/pci/cx25821/cx25821.h
index fb2920c..a513b68 100644
--- a/drivers/media/pci/cx25821/cx25821.h
+++ b/drivers/media/pci/cx25821/cx25821.h
@@ -34,6 +34,7 @@
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-sg.h>
#include "cx25821-reg.h"
diff --git a/drivers/media/pci/cx88/cx88-blackbird.c b/drivers/media/pci/cx88/cx88-blackbird.c
index 49d0b7c..8b88913 100644
--- a/drivers/media/pci/cx88/cx88-blackbird.c
+++ b/drivers/media/pci/cx88/cx88-blackbird.c
@@ -637,7 +637,7 @@ static int blackbird_stop_codec(struct cx8802_dev *dev)
/* ------------------------------------------------------------------ */
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/cx88/cx88-dvb.c b/drivers/media/pci/cx88/cx88-dvb.c
index f0923fb..f048350 100644
--- a/drivers/media/pci/cx88/cx88-dvb.c
+++ b/drivers/media/pci/cx88/cx88-dvb.c
@@ -82,7 +82,7 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
/* ------------------------------------------------------------------ */
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/cx88/cx88-mpeg.c b/drivers/media/pci/cx88/cx88-mpeg.c
index a4f5e1e..a315cd6 100644
--- a/drivers/media/pci/cx88/cx88-mpeg.c
+++ b/drivers/media/pci/cx88/cx88-mpeg.c
@@ -225,7 +225,7 @@ int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
struct cx88_buffer *buf)
{
int size = dev->ts_packet_size * dev->ts_packet_count;
- struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb, 0);
+ struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
struct cx88_riscmem *risc = &buf->risc;
int rc;
diff --git a/drivers/media/pci/cx88/cx88-vbi.c b/drivers/media/pci/cx88/cx88-vbi.c
index cd2f3fb..2bdfbb9 100644
--- a/drivers/media/pci/cx88/cx88-vbi.c
+++ b/drivers/media/pci/cx88/cx88-vbi.c
@@ -107,7 +107,7 @@ int cx8800_restart_vbi_queue(struct cx8800_dev *dev,
/* ------------------------------------------------------------------ */
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/cx88/cx88-video.c b/drivers/media/pci/cx88/cx88-video.c
index fae28e7..4af3808 100644
--- a/drivers/media/pci/cx88/cx88-video.c
+++ b/drivers/media/pci/cx88/cx88-video.c
@@ -429,7 +429,7 @@ static int restart_video_queue(struct cx8800_dev *dev,
/* ------------------------------------------------------------------ */
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
@@ -447,7 +447,7 @@ static int buffer_prepare(struct vb2_buffer *vb)
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct cx8800_dev *dev = vb->vb2_queue->drv_priv;
struct cx88_core *core = dev->core;
- struct cx88_buffer *buf = container_of(vb, struct cx88_buffer, vb);
+ struct cx88_buffer *buf = container_of(vbuf, struct cx88_buffer, vb);
struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
buf->bpl = core->width * dev->fmt->depth >> 3;
diff --git a/drivers/media/pci/dt3155/dt3155.c b/drivers/media/pci/dt3155/dt3155.c
index f4f8355..0aa45d0 100644
--- a/drivers/media/pci/dt3155/dt3155.c
+++ b/drivers/media/pci/dt3155/dt3155.c
@@ -22,6 +22,7 @@
#include <media/v4l2-dev.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-common.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>
#include "dt3155.h"
@@ -131,11 +132,12 @@ static int wait_i2c_reg(void __iomem *addr)
}
static int
-dt3155_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+dt3155_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ const struct v4l2_format *fmt = (const struct v4l2_format *) parg;
struct dt3155_priv *pd = vb2_get_drv_priv(vq);
unsigned size = pd->width * pd->height;
diff --git a/drivers/media/pci/saa7134/saa7134-ts.c b/drivers/media/pci/saa7134/saa7134-ts.c
index 62b218b..b19a00f 100644
--- a/drivers/media/pci/saa7134/saa7134-ts.c
+++ b/drivers/media/pci/saa7134/saa7134-ts.c
@@ -116,7 +116,7 @@ int saa7134_ts_buffer_prepare(struct vb2_buffer *vb)
}
EXPORT_SYMBOL_GPL(saa7134_ts_buffer_prepare);
-int saa7134_ts_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+int saa7134_ts_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/saa7134/saa7134-vbi.c b/drivers/media/pci/saa7134/saa7134-vbi.c
index ecc4e61..c3cdb89 100644
--- a/drivers/media/pci/saa7134/saa7134-vbi.c
+++ b/drivers/media/pci/saa7134/saa7134-vbi.c
@@ -138,7 +138,7 @@ static int buffer_prepare(struct vb2_buffer *vb)
saa7134_buffer_startpage(buf));
}
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/saa7134/saa7134-video.c b/drivers/media/pci/saa7134/saa7134-video.c
index a03bbb8..7ea9411 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -904,7 +904,7 @@ static int buffer_prepare(struct vb2_buffer *vb)
saa7134_buffer_startpage(buf));
}
-static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/saa7134/saa7134.h b/drivers/media/pci/saa7134/saa7134.h
index f3f9ba4..ffeaf65 100644
--- a/drivers/media/pci/saa7134/saa7134.h
+++ b/drivers/media/pci/saa7134/saa7134.h
@@ -43,6 +43,7 @@
#include <media/tuner.h>
#include <media/rc-core.h>
#include <media/ir-kbd-i2c.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-sg.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -819,7 +820,7 @@ void saa7134_video_fini(struct saa7134_dev *dev);
int saa7134_ts_buffer_init(struct vb2_buffer *vb);
int saa7134_ts_buffer_prepare(struct vb2_buffer *vb);
-int saa7134_ts_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+int saa7134_ts_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[]);
int saa7134_ts_start_streaming(struct vb2_queue *vq, unsigned int count);
diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
index 6238e09..19dc488 100644
--- a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
+++ b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
@@ -660,8 +660,7 @@ static int solo_ring_thread(void *data)
return 0;
}
-static int solo_enc_queue_setup(struct vb2_queue *q,
- const struct v4l2_format *fmt,
+static int solo_enc_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers,
unsigned int *num_planes, unsigned int sizes[],
void *alloc_ctxs[])
diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2.c b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
index b46196b..628d019 100644
--- a/drivers/media/pci/solo6x10/solo6x10-v4l2.c
+++ b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
@@ -312,7 +312,7 @@ static void solo_stop_thread(struct solo_dev *solo_dev)
solo_dev->kthread = NULL;
}
-static int solo_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int solo_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/sta2x11/sta2x11_vip.c b/drivers/media/pci/sta2x11/sta2x11_vip.c
index 1edc1f2..a4dc2d5 100644
--- a/drivers/media/pci/sta2x11/sta2x11_vip.c
+++ b/drivers/media/pci/sta2x11/sta2x11_vip.c
@@ -265,7 +265,7 @@ static void vip_active_buf_next(struct sta2x11_vip *vip)
/* Videobuf2 Operations */
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/pci/tw68/tw68-video.c b/drivers/media/pci/tw68/tw68-video.c
index a2ecc5c..82dbc9a 100644
--- a/drivers/media/pci/tw68/tw68-video.c
+++ b/drivers/media/pci/tw68/tw68-video.c
@@ -376,10 +376,11 @@ static int tw68_buffer_count(unsigned int size, unsigned int count)
/* ------------------------------------------------------------- */
/* vb2 queue operations */
-static int tw68_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
+static int tw68_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct tw68_dev *dev = vb2_get_drv_priv(q);
unsigned tot_bufs = q->num_buffers + *num_buffers;
diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 2a03c1a..1c87afe 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -201,11 +201,11 @@ static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
bcap_dev->sensor_formats = NULL;
}
-static int bcap_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int bcap_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ const struct v4l2_format *fmt = (const struct v4l2_format *)parg;
struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c
index 0b84bd3..10c4a9e 100644
--- a/drivers/media/platform/coda/coda-common.c
+++ b/drivers/media/platform/coda/coda-common.c
@@ -1131,8 +1131,7 @@ static void set_default_params(struct coda_ctx *ctx)
/*
* Queue operations
*/
-static int coda_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int coda_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/davinci/vpbe_display.c b/drivers/media/platform/davinci/vpbe_display.c
index bf5bf69..c0703aa 100644
--- a/drivers/media/platform/davinci/vpbe_display.c
+++ b/drivers/media/platform/davinci/vpbe_display.c
@@ -228,11 +228,12 @@ static int vpbe_buffer_prepare(struct vb2_buffer *vb)
* This function allocates memory for the buffers
*/
static int
-vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+vpbe_buffer_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
/* Get the file handle object and layer object */
struct vpbe_layer *layer = vb2_get_drv_priv(vq);
struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index d0d76e2..b583ff1 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -112,11 +112,11 @@ static int vpif_buffer_prepare(struct vb2_buffer *vb)
* This callback function is called when reqbuf() is called to adjust
* the buffer count and buffer size
*/
-static int vpif_buffer_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int vpif_buffer_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct channel_obj *ch = vb2_get_drv_priv(vq);
struct common_obj *common;
diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 46fc783..f7963bd 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -107,11 +107,11 @@ static int vpif_buffer_prepare(struct vb2_v4l2_buffer *vb)
* This callback function is called when reqbuf() is called to adjust
* the buffer count and buffer size
*/
-static int vpif_buffer_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int vpif_buffer_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct channel_obj *ch = vb2_get_drv_priv(vq);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
diff --git a/drivers/media/platform/exynos-gsc/gsc-m2m.c b/drivers/media/platform/exynos-gsc/gsc-m2m.c
index 6003a4f..95df3a9 100644
--- a/drivers/media/platform/exynos-gsc/gsc-m2m.c
+++ b/drivers/media/platform/exynos-gsc/gsc-m2m.c
@@ -211,8 +211,7 @@ put_device:
spin_unlock_irqrestore(&gsc->slock, flags);
}
-static int gsc_m2m_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int gsc_m2m_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *allocators[])
{
diff --git a/drivers/media/platform/exynos4-is/fimc-capture.c b/drivers/media/platform/exynos4-is/fimc-capture.c
index 78133c1..01bb3d7 100644
--- a/drivers/media/platform/exynos4-is/fimc-capture.c
+++ b/drivers/media/platform/exynos4-is/fimc-capture.c
@@ -345,10 +345,11 @@ int fimc_capture_resume(struct fimc_dev *fimc)
}
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *allocators[])
{
+ struct v4l2_format *pfmt = (struct v4l2_format *)parg;
const struct v4l2_pix_format_mplane *pixm = NULL;
struct fimc_ctx *ctx = vq->drv_priv;
struct fimc_frame *frame = &ctx->d_frame;
diff --git a/drivers/media/platform/exynos4-is/fimc-isp-video.c b/drivers/media/platform/exynos4-is/fimc-isp-video.c
index 52e1d61..2383724 100644
--- a/drivers/media/platform/exynos4-is/fimc-isp-video.c
+++ b/drivers/media/platform/exynos4-is/fimc-isp-video.c
@@ -39,10 +39,11 @@
#include "fimc-is-param.h"
static int isp_video_capture_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *pfmt,
+ const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *allocators[])
{
+ struct v4l2_format *pfmt = (struct v4l2_format *)parg;
struct fimc_isp *isp = vb2_get_drv_priv(vq);
struct v4l2_pix_format_mplane *vid_fmt = &isp->video_capture.pixfmt;
const struct v4l2_pix_format_mplane *pixm = NULL;
diff --git a/drivers/media/platform/exynos4-is/fimc-lite.c b/drivers/media/platform/exynos4-is/fimc-lite.c
index 316d25b..e9aaee7 100644
--- a/drivers/media/platform/exynos4-is/fimc-lite.c
+++ b/drivers/media/platform/exynos4-is/fimc-lite.c
@@ -361,10 +361,11 @@ static void stop_streaming(struct vb2_queue *q)
fimc_lite_stop_capture(fimc, false);
}
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *allocators[])
{
+ struct v4l2_format *pfmt = (struct v4l2_format *)parg;
const struct v4l2_pix_format_mplane *pixm = NULL;
struct fimc_lite *fimc = vq->drv_priv;
struct flite_frame *frame = &fimc->out_frame;
diff --git a/drivers/media/platform/exynos4-is/fimc-m2m.c b/drivers/media/platform/exynos4-is/fimc-m2m.c
index f6e72b4..06d6436 100644
--- a/drivers/media/platform/exynos4-is/fimc-m2m.c
+++ b/drivers/media/platform/exynos4-is/fimc-m2m.c
@@ -176,7 +176,7 @@ static void fimc_job_abort(void *priv)
fimc_m2m_shutdown(priv);
}
-static int fimc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int fimc_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *allocators[])
{
diff --git a/drivers/media/platform/m2m-deinterlace.c b/drivers/media/platform/m2m-deinterlace.c
index 475e82d..e67f9d2 100644
--- a/drivers/media/platform/m2m-deinterlace.c
+++ b/drivers/media/platform/m2m-deinterlace.c
@@ -797,8 +797,7 @@ struct vb2_dc_conf {
struct device *dev;
};
-static int deinterlace_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int deinterlace_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c
index 645ebf8..b3735a7 100644
--- a/drivers/media/platform/marvell-ccic/mcam-core.c
+++ b/drivers/media/platform/marvell-ccic/mcam-core.c
@@ -1049,10 +1049,11 @@ static int mcam_read_setup(struct mcam_camera *cam)
*/
static int mcam_vb_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt, unsigned int *nbufs,
+ const void *parg, unsigned int *nbufs,
unsigned int *num_planes, unsigned int sizes[],
void *alloc_ctxs[])
{
+ const struct v4l2_format *fmt = (const struct v4l2_format *) parg;
struct mcam_camera *cam = vb2_get_drv_priv(vq);
int minbufs = (cam->buffer_mode == B_DMA_contig) ? 3 : 2;
@@ -1098,14 +1099,14 @@ static void mcam_vb_requeue_bufs(struct vb2_queue *vq,
spin_lock_irqsave(&cam->dev_lock, flags);
list_for_each_entry_safe(buf, node, &cam->buffers, queue) {
- vb2_buffer_done(&buf->vb_buf, state);
+ vb2_buffer_done(&buf->vb_buf.vb2_buf, state);
list_del(&buf->queue);
}
for (i = 0; i < MAX_DMA_BUFS; i++) {
buf = cam->vb_bufs[i];
if (buf) {
- vb2_buffer_done(&buf->vb_buf, state);
+ vb2_buffer_done(&buf->vb_buf.vb2_buf, state);
cam->vb_bufs[i] = NULL;
}
}
diff --git a/drivers/media/platform/mx2_emmaprp.c b/drivers/media/platform/mx2_emmaprp.c
index 03072e2..269e1bc 100644
--- a/drivers/media/platform/mx2_emmaprp.c
+++ b/drivers/media/platform/mx2_emmaprp.c
@@ -688,8 +688,7 @@ static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
/*
* Queue operations
*/
-static int emmaprp_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int emmaprp_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index 09d4c82..65f57a2 100644
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -319,8 +319,7 @@ isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
* Video queue operations
*/
-static int isp_video_queue_setup(struct vb2_queue *queue,
- const struct v4l2_format *fmt,
+static int isp_video_queue_setup(struct vb2_queue *queue, const void *parg,
unsigned int *count, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/s3c-camif/camif-capture.c b/drivers/media/platform/s3c-camif/camif-capture.c
index c8bf624..8f4e9f4 100644
--- a/drivers/media/platform/s3c-camif/camif-capture.c
+++ b/drivers/media/platform/s3c-camif/camif-capture.c
@@ -442,10 +442,11 @@ static void stop_streaming(struct vb2_queue *vq)
camif_stop_capture(vp);
}
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *allocators[])
{
+ struct v4l2_format *pfmt = (struct v4l2_format *)parg;
const struct v4l2_pix_format *pix = NULL;
struct camif_vp *vp = vb2_get_drv_priv(vq);
struct camif_dev *camif = vp->camif;
diff --git a/drivers/media/platform/s5p-g2d/g2d.c b/drivers/media/platform/s5p-g2d/g2d.c
index 9e50173..9fade63 100644
--- a/drivers/media/platform/s5p-g2d/g2d.c
+++ b/drivers/media/platform/s5p-g2d/g2d.c
@@ -101,7 +101,7 @@ static struct g2d_frame *get_frame(struct g2d_ctx *ctx,
}
}
-static int g2d_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int g2d_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 2300740..8fd178d 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -2121,8 +2121,7 @@ static struct v4l2_m2m_ops exynos4_jpeg_m2m_ops = {
* ============================================================================
*/
-static int s5p_jpeg_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int s5p_jpeg_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 7d75d8e..1de804d 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -883,7 +883,7 @@ static const struct v4l2_ioctl_ops s5p_mfc_dec_ioctl_ops = {
};
static int s5p_mfc_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt, unsigned int *buf_count,
+ const void *parg, unsigned int *buf_count,
unsigned int *plane_count, unsigned int psize[],
void *allocators[])
{
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
index e65249a..3b4b556 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
@@ -1816,8 +1816,7 @@ static int check_vb_with_fmt(struct s5p_mfc_fmt *fmt, struct vb2_buffer *vb)
return 0;
}
-static int s5p_mfc_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int s5p_mfc_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *buf_count, unsigned int *plane_count,
unsigned int psize[], void *allocators[])
{
diff --git a/drivers/media/platform/s5p-tv/mixer_video.c b/drivers/media/platform/s5p-tv/mixer_video.c
index dba92b5..dc1c679 100644
--- a/drivers/media/platform/s5p-tv/mixer_video.c
+++ b/drivers/media/platform/s5p-tv/mixer_video.c
@@ -881,7 +881,7 @@ static const struct v4l2_file_operations mxr_fops = {
.unlocked_ioctl = video_ioctl2,
};
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/sh_veu.c b/drivers/media/platform/sh_veu.c
index a0910d9..1affcae 100644
--- a/drivers/media/platform/sh_veu.c
+++ b/drivers/media/platform/sh_veu.c
@@ -864,11 +864,11 @@ static const struct v4l2_ioctl_ops sh_veu_ioctl_ops = {
/* ========== Queue operations ========== */
-static int sh_veu_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *f,
+static int sh_veu_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *f = (struct v4l2_format *)parg;
struct sh_veu_dev *veu = vb2_get_drv_priv(vq);
struct sh_veu_vfmt *vfmt;
unsigned int size, count = *nbuffers;
diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index 621a1a7..7268a2f 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -235,7 +235,7 @@ static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset)
/* ------------------------------------------------------------------
Videobuf operations
------------------------------------------------------------------*/
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/soc_camera/mx2_camera.c b/drivers/media/platform/soc_camera/mx2_camera.c
index b250706..57e8ad0 100644
--- a/drivers/media/platform/soc_camera/mx2_camera.c
+++ b/drivers/media/platform/soc_camera/mx2_camera.c
@@ -469,10 +469,11 @@ static void mx2_camera_clock_stop(struct soc_camera_host *ici)
* Videobuf operations
*/
static int mx2_videobuf_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+ const void *parg,
unsigned int *count, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct mx2_camera_dev *pcdev = ici->priv;
diff --git a/drivers/media/platform/soc_camera/mx3_camera.c b/drivers/media/platform/soc_camera/mx3_camera.c
index 6c566b8..fa8849f 100644
--- a/drivers/media/platform/soc_camera/mx3_camera.c
+++ b/drivers/media/platform/soc_camera/mx3_camera.c
@@ -184,11 +184,11 @@ static void mx3_cam_dma_done(void *arg)
/*
* Calculate the __buffer__ (not data) size and number of buffers.
*/
-static int mx3_videobuf_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int mx3_videobuf_setup(struct vb2_queue *vq, const void *parg,
unsigned int *count, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct mx3_camera_dev *mx3_cam = ici->priv;
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index afa887e..c529d10 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -526,11 +526,11 @@ struct rcar_vin_cam {
* required
*/
static int rcar_vin_videobuf_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
- unsigned int *count,
+ const void *parg, unsigned int *count,
unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
diff --git a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
index b46c3e3..7335b79 100644
--- a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
+++ b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
@@ -209,11 +209,11 @@ static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
* requested number of buffers and to fill in plane sizes
* for the current frame format if required
*/
-static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq, const void *parg,
unsigned int *count, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 19fea47..6934a95 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -1797,8 +1797,7 @@ static const struct v4l2_ioctl_ops vpe_ioctl_ops = {
/*
* Queue operations
*/
-static int vpe_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int vpe_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/vim2m.c b/drivers/media/platform/vim2m.c
index 267525a..7664319 100644
--- a/drivers/media/platform/vim2m.c
+++ b/drivers/media/platform/vim2m.c
@@ -709,8 +709,7 @@ static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
* Queue operations
*/
-static int vim2m_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int vim2m_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/vivid/vivid-sdr-cap.c b/drivers/media/platform/vivid/vivid-sdr-cap.c
index 2b46175..cf7f56c 100644
--- a/drivers/media/platform/vivid/vivid-sdr-cap.c
+++ b/drivers/media/platform/vivid/vivid-sdr-cap.c
@@ -210,7 +210,7 @@ static int vivid_thread_sdr_cap(void *data)
return 0;
}
-static int sdr_cap_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int sdr_cap_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned *nbuffers, unsigned *nplanes,
unsigned sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/vivid/vivid-vbi-cap.c b/drivers/media/platform/vivid/vivid-vbi-cap.c
index 0ea990b..26837e4 100644
--- a/drivers/media/platform/vivid/vivid-vbi-cap.c
+++ b/drivers/media/platform/vivid/vivid-vbi-cap.c
@@ -136,7 +136,7 @@ void vivid_sliced_vbi_cap_process(struct vivid_dev *dev, struct vivid_buffer *bu
buf->vb.v4l2_buf.timestamp.tv_sec += dev->time_wrap_offset;
}
-static int vbi_cap_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int vbi_cap_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned *nbuffers, unsigned *nplanes,
unsigned sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/vivid/vivid-vbi-out.c b/drivers/media/platform/vivid/vivid-vbi-out.c
index 65097c6..a51fc70 100644
--- a/drivers/media/platform/vivid/vivid-vbi-out.c
+++ b/drivers/media/platform/vivid/vivid-vbi-out.c
@@ -27,7 +27,7 @@
#include "vivid-vbi-out.h"
#include "vivid-vbi-cap.h"
-static int vbi_out_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int vbi_out_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned *nbuffers, unsigned *nplanes,
unsigned sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c b/drivers/media/platform/vivid/vivid-vid-cap.c
index 1828a27..3ffa410 100644
--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -95,10 +95,11 @@ static const struct v4l2_discrete_probe webcam_probe = {
VIVID_WEBCAM_SIZES
};
-static int vid_cap_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int vid_cap_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned *nbuffers, unsigned *nplanes,
unsigned sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct vivid_dev *dev = vb2_get_drv_priv(vq);
unsigned buffers = tpg_g_buffers(&dev->tpg);
unsigned h = dev->fmt_cap_rect.height;
diff --git a/drivers/media/platform/vivid/vivid-vid-out.c b/drivers/media/platform/vivid/vivid-vid-out.c
index de7a076..9d3055c 100644
--- a/drivers/media/platform/vivid/vivid-vid-out.c
+++ b/drivers/media/platform/vivid/vivid-vid-out.c
@@ -31,10 +31,11 @@
#include "vivid-kthread-out.h"
#include "vivid-vid-out.h"
-static int vid_out_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int vid_out_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned *nbuffers, unsigned *nplanes,
unsigned sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct vivid_dev *dev = vb2_get_drv_priv(vq);
const struct vivid_fmt *vfmt = dev->fmt_out;
unsigned planes = vfmt->buffers;
diff --git a/drivers/media/platform/vsp1/vsp1_video.c b/drivers/media/platform/vsp1/vsp1_video.c
index 389fb0b..ee47aaf 100644
--- a/drivers/media/platform/vsp1/vsp1_video.c
+++ b/drivers/media/platform/vsp1/vsp1_video.c
@@ -788,10 +788,11 @@ void vsp1_pipelines_resume(struct vsp1_device *vsp1)
*/
static int
-vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+vsp1_video_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct vsp1_video *video = vb2_get_drv_priv(vq);
const struct v4l2_pix_format_mplane *format;
struct v4l2_pix_format_mplane pix_mp;
diff --git a/drivers/media/usb/airspy/airspy.c b/drivers/media/usb/airspy/airspy.c
index 253884a..826687b 100644
--- a/drivers/media/usb/airspy/airspy.c
+++ b/drivers/media/usb/airspy/airspy.c
@@ -486,7 +486,7 @@ static void airspy_disconnect(struct usb_interface *intf)
/* Videobuf2 operations */
static int airspy_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt, unsigned int *nbuffers,
+ const void *parg, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
{
struct airspy *s = vb2_get_drv_priv(vq);
diff --git a/drivers/media/usb/au0828/au0828-vbi.c b/drivers/media/usb/au0828/au0828-vbi.c
index 5fbf279..c207c03 100644
--- a/drivers/media/usb/au0828/au0828-vbi.c
+++ b/drivers/media/usb/au0828/au0828-vbi.c
@@ -30,10 +30,11 @@
/* ------------------------------------------------------------------ */
-static int vbi_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int vbi_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct au0828_dev *dev = vb2_get_drv_priv(vq);
unsigned long img_size = dev->vbi_width * dev->vbi_height * 2;
unsigned long size;
diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
index 28e374e..c73c627 100644
--- a/drivers/media/usb/au0828/au0828-video.c
+++ b/drivers/media/usb/au0828/au0828-video.c
@@ -638,10 +638,11 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
return rc;
}
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct au0828_dev *dev = vb2_get_drv_priv(vq);
unsigned long img_size = dev->height * dev->bytesperline;
unsigned long size;
diff --git a/drivers/media/usb/au0828/au0828.h b/drivers/media/usb/au0828/au0828.h
index 270aa47..073ee00 100644
--- a/drivers/media/usb/au0828/au0828.h
+++ b/drivers/media/usb/au0828/au0828.h
@@ -29,6 +29,7 @@
/* Analog */
#include <linux/videodev2.h>
#include <media/videobuf2-vmalloc.h>
+#include <media/videobuf2-v4l2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
diff --git a/drivers/media/usb/em28xx/em28xx-vbi.c b/drivers/media/usb/em28xx/em28xx-vbi.c
index 50b33c9..4007b44 100644
--- a/drivers/media/usb/em28xx/em28xx-vbi.c
+++ b/drivers/media/usb/em28xx/em28xx-vbi.c
@@ -31,10 +31,11 @@
/* ------------------------------------------------------------------ */
-static int vbi_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int vbi_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct em28xx *dev = vb2_get_drv_priv(vq);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
unsigned long size;
diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index bbccaed..b34ff421 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -871,10 +871,11 @@ static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
Videobuf2 operations
------------------------------------------------------------------*/
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct em28xx *dev = vb2_get_drv_priv(vq);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
unsigned long size;
diff --git a/drivers/media/usb/em28xx/em28xx.h b/drivers/media/usb/em28xx/em28xx.h
index e8512c4..76bf8ba 100644
--- a/drivers/media/usb/em28xx/em28xx.h
+++ b/drivers/media/usb/em28xx/em28xx.h
@@ -35,6 +35,7 @@
#include <linux/kref.h>
#include <linux/videodev2.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
diff --git a/drivers/media/usb/go7007/go7007-v4l2.c b/drivers/media/usb/go7007/go7007-v4l2.c
index 3d4e5db..8183a1d 100644
--- a/drivers/media/usb/go7007/go7007-v4l2.c
+++ b/drivers/media/usb/go7007/go7007-v4l2.c
@@ -368,8 +368,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
return set_capture_size(go, fmt, 0);
}
-static int go7007_queue_setup(struct vb2_queue *q,
- const struct v4l2_format *fmt,
+static int go7007_queue_setup(struct vb2_queue *q, const void *parg,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/usb/hackrf/hackrf.c b/drivers/media/usb/hackrf/hackrf.c
index 935b920..c07b44f 100644
--- a/drivers/media/usb/hackrf/hackrf.c
+++ b/drivers/media/usb/hackrf/hackrf.c
@@ -464,7 +464,7 @@ static void hackrf_disconnect(struct usb_interface *intf)
/* Videobuf2 operations */
static int hackrf_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt, unsigned int *nbuffers,
+ const void *parg, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
{
struct hackrf_dev *dev = vb2_get_drv_priv(vq);
diff --git a/drivers/media/usb/msi2500/msi2500.c b/drivers/media/usb/msi2500/msi2500.c
index 77cfb7d..af4dd23 100644
--- a/drivers/media/usb/msi2500/msi2500.c
+++ b/drivers/media/usb/msi2500/msi2500.c
@@ -613,8 +613,7 @@ static int msi2500_querycap(struct file *file, void *fh,
}
/* Videobuf2 operations */
-static int msi2500_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt,
+static int msi2500_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[],
void *alloc_ctxs[])
diff --git a/drivers/media/usb/pwc/pwc-if.c b/drivers/media/usb/pwc/pwc-if.c
index 2fc3c0f..79e4ca2 100644
--- a/drivers/media/usb/pwc/pwc-if.c
+++ b/drivers/media/usb/pwc/pwc-if.c
@@ -572,7 +572,7 @@ static void pwc_video_release(struct v4l2_device *v)
/***************************************************************************/
/* Videobuf2 operations */
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/usb/pwc/pwc.h b/drivers/media/usb/pwc/pwc.h
index e2c12dc..e0d9125 100644
--- a/drivers/media/usb/pwc/pwc.h
+++ b/drivers/media/usb/pwc/pwc.h
@@ -40,6 +40,7 @@
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#ifdef CONFIG_USB_PWC_INPUT_EVDEV
#include <linux/input.h>
diff --git a/drivers/media/usb/s2255/s2255drv.c b/drivers/media/usb/s2255/s2255drv.c
index 4284e56..0d909a4 100644
--- a/drivers/media/usb/s2255/s2255drv.c
+++ b/drivers/media/usb/s2255/s2255drv.c
@@ -45,6 +45,7 @@
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/usb.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
@@ -660,7 +661,7 @@ static void s2255_fillbuff(struct s2255_vc *vc,
Videobuf operations
------------------------------------------------------------------*/
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/usb/stk1160/stk1160-v4l.c b/drivers/media/usb/stk1160/stk1160-v4l.c
index 6e23b2b..a7daa08 100644
--- a/drivers/media/usb/stk1160/stk1160-v4l.c
+++ b/drivers/media/usb/stk1160/stk1160-v4l.c
@@ -664,7 +664,7 @@ static const struct v4l2_ioctl_ops stk1160_ioctl_ops = {
/*
* Videobuf2 operations
*/
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *v4l_fmt,
+static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c
index 2f8674d..3e17802 100644
--- a/drivers/media/usb/usbtv/usbtv-video.c
+++ b/drivers/media/usb/usbtv/usbtv-video.c
@@ -599,9 +599,10 @@ static struct v4l2_file_operations usbtv_fops = {
};
static int usbtv_queue_setup(struct vb2_queue *vq,
- const struct v4l2_format *fmt, unsigned int *nbuffers,
+ const void *varg, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
{
+ const struct v4l2_format *fmt = (const struct v4l2_format *)varg;
struct usbtv *usbtv = vb2_get_drv_priv(vq);
unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
diff --git a/drivers/media/usb/usbtv/usbtv.h b/drivers/media/usb/usbtv/usbtv.h
index a1a4d95..19cb8bf 100644
--- a/drivers/media/usb/usbtv/usbtv.h
+++ b/drivers/media/usb/usbtv/usbtv.h
@@ -24,6 +24,7 @@
#include <linux/usb.h>
#include <media/v4l2-device.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
/* Hardware. */
diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c
index 2db04b2..2905123 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -68,10 +68,11 @@ static void uvc_queue_return_buffers(struct uvc_video_queue *queue,
* videobuf2 queue operations
*/
-static int uvc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int uvc_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
+ struct v4l2_format *fmt = (struct v4l2_format *)parg;
struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
struct uvc_streaming *stream = uvc_queue_to_stream(queue);
diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile
index 16865b8..c54dd26 100644
--- a/drivers/media/v4l2-core/Makefile
+++ b/drivers/media/v4l2-core/Makefile
@@ -30,7 +30,7 @@ obj-$(CONFIG_VIDEOBUF_DMA_CONTIG) += videobuf-dma-contig.o
obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o
obj-$(CONFIG_VIDEOBUF_DVB) += videobuf-dvb.o
-obj-$(CONFIG_VIDEOBUF2_CORE) += videobuf2-v4l2.o
+obj-$(CONFIG_VIDEOBUF2_CORE) += videobuf2-core.o videobuf2-v4l2.o
obj-$(CONFIG_VIDEOBUF2_MEMOPS) += videobuf2-memops.o
obj-$(CONFIG_VIDEOBUF2_VMALLOC) += videobuf2-vmalloc.o
obj-$(CONFIG_VIDEOBUF2_DMA_CONTIG) += videobuf2-dma-contig.o
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
new file mode 100644
index 0000000..0460a99
--- /dev/null
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -0,0 +1,1797 @@
+/*
+ * videobuf2-core.c - Video Buffer 2 Core Framework
+ *
+ * Copyright (C) 2010 Samsung Electronics
+ *
+ * Author: Pawel Osciak <pawel@xxxxxxxxxx>
+ * Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
+ *
+ * The vb2_thread implementation was based on code from videobuf-dvb.c:
+ * (c) 2004 Gerd Knorr <kraxel@xxxxxxxxxxx> [SUSE Labs]
+ *
+ * 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.
+ */
+
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/freezer.h>
+#include <linux/kthread.h>
+
+#include <media/videobuf2-core.h>
+
+#include <trace/events/v4l2.h>
+
+int vb2_debug;
+module_param_named(debug, vb2_debug, int, 0644);
+
+static void __enqueue_in_driver(struct vb2_buffer *vb);
+static void __vb2_queue_cancel(struct vb2_queue *q);
+
+/**
+ * __vb2_buf_mem_alloc() - allocate video memory for the given buffer
+ */
+static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ enum dma_data_direction dma_dir =
+ V4L2_TYPE_IS_OUTPUT(q->type) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+ void *mem_priv;
+ int plane;
+
+ /*
+ * Allocate memory for all planes in this buffer
+ * NOTE: mmapped areas should be page aligned
+ */
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ unsigned long size = PAGE_ALIGN(q->plane_sizes[plane]);
+
+ mem_priv = call_ptr_memop(vb, alloc, q->alloc_ctx[plane],
+ size, dma_dir, q->gfp_flags);
+ if (IS_ERR_OR_NULL(mem_priv))
+ goto free;
+
+ /* Associate allocator private data with this plane */
+ vb->planes[plane].mem_priv = mem_priv;
+ call_bufop(q, set_plane_length, vb, plane,
+ q->plane_sizes[plane]);
+ }
+
+ return 0;
+free:
+ /* Free already allocated memory if one of the allocations failed */
+ for (; plane > 0; --plane) {
+ call_void_memop(vb, put, vb->planes[plane - 1].mem_priv);
+ vb->planes[plane - 1].mem_priv = NULL;
+ }
+
+ return -ENOMEM;
+}
+
+/**
+ * __vb2_buf_mem_free() - free memory of the given buffer
+ */
+static void __vb2_buf_mem_free(struct vb2_buffer *vb)
+{
+ unsigned int plane;
+
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ call_void_memop(vb, put, vb->planes[plane].mem_priv);
+ vb->planes[plane].mem_priv = NULL;
+ VB2_DEBUG(3, "freed plane %d of buffer %d\n", plane,
+ vb2_index(vb));
+ }
+}
+
+/**
+ * __vb2_buf_userptr_put() - release userspace memory associated with
+ * a USERPTR buffer
+ */
+static void __vb2_buf_userptr_put(struct vb2_buffer *vb)
+{
+ unsigned int plane;
+
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ if (vb->planes[plane].mem_priv)
+ call_void_memop(vb, put_userptr, vb->planes[plane].mem_priv);
+ vb->planes[plane].mem_priv = NULL;
+ }
+}
+
+/**
+ * __vb2_plane_dmabuf_put() - release memory associated with
+ * a DMABUF shared plane
+ */
+void __vb2_plane_dmabuf_put(struct vb2_buffer *vb, struct vb2_plane *p)
+{
+ if (!p->mem_priv)
+ return;
+
+ if (p->dbuf_mapped)
+ call_void_memop(vb, unmap_dmabuf, p->mem_priv);
+
+ call_void_memop(vb, detach_dmabuf, p->mem_priv);
+ dma_buf_put(p->dbuf);
+ memset(p, 0, sizeof(*p));
+}
+
+/**
+ * __vb2_buf_dmabuf_put() - release memory associated with
+ * a DMABUF shared buffer
+ */
+void __vb2_buf_dmabuf_put(struct vb2_buffer *vb)
+{
+ unsigned int plane;
+
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ __vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
+}
+
+/**
+ * __setup_lengths() - setup initial lengths for every plane in
+ * every buffer on the queue
+ */
+static void __setup_lengths(struct vb2_queue *q, unsigned int n)
+{
+ unsigned int buffer, plane;
+ struct vb2_buffer *vb;
+
+ for (buffer = q->num_buffers; buffer < q->num_buffers + n; ++buffer) {
+ vb = q->bufs[buffer];
+ if (!vb)
+ continue;
+
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ call_bufop(q, set_plane_length, vb, plane,
+ q->plane_sizes[plane]);
+ }
+}
+
+/**
+ * __setup_offsets() - setup unique offsets ("cookies") for every plane in
+ * every buffer on the queue
+ */
+static void __setup_offsets(struct vb2_queue *q, unsigned int n)
+{
+ unsigned int buffer, plane;
+ struct vb2_buffer *vb;
+ unsigned long off;
+
+ if (q->num_buffers) {
+ vb = q->bufs[q->num_buffers - 1];
+ off = call_u32_bufop(q, get_plane_offset, vb, vb->num_planes - 1);
+ off += call_u32_bufop(q, get_plane_length, vb, vb->num_planes - 1);
+ off = PAGE_ALIGN(off);
+ } else {
+ off = 0;
+ }
+
+ for (buffer = q->num_buffers; buffer < q->num_buffers + n; ++buffer) {
+ vb = q->bufs[buffer];
+ if (!vb)
+ continue;
+
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ call_bufop(q, set_plane_offset, vb, plane, off);
+
+ VB2_DEBUG(3, "buffer %d, plane %d offset 0x%08lx\n",
+ buffer, plane, off);
+
+ off += call_u32_bufop(q, get_plane_length, vb, plane);
+ off = PAGE_ALIGN(off);
+ }
+ }
+}
+
+/**
+ * __vb2_queue_alloc() - allocate videobuf buffer structures and (for MMAP type)
+ * video buffer memory for all buffers/planes on the queue and initializes the
+ * queue
+ *
+ * Returns the number of buffers successfully allocated.
+ */
+static int __vb2_queue_alloc(struct vb2_queue *q, unsigned int memory,
+ unsigned int num_buffers, unsigned int num_planes)
+{
+ unsigned int buffer;
+ struct vb2_buffer *vb;
+ int ret;
+
+ for (buffer = 0; buffer < num_buffers; ++buffer) {
+ /* Allocate videobuf buffer structures */
+ vb = kzalloc(q->buf_struct_size, GFP_KERNEL);
+ if (!vb) {
+ VB2_DEBUG(1, "memory alloc for buffer struct failed\n");
+ break;
+ }
+
+ vb->state = VB2_BUF_STATE_DEQUEUED;
+ vb->vb2_queue = q;
+ vb->num_planes = num_planes;
+ call_bufop(q, init_buffer, vb, memory, q->type,
+ q->num_buffers + buffer, num_planes);
+
+ /* Allocate video buffer memory for the MMAP type */
+ if (memory == V4L2_MEMORY_MMAP) {
+ ret = __vb2_buf_mem_alloc(vb);
+ if (ret) {
+ VB2_DEBUG(1, "failed allocating memory for "
+ "buffer %d\n", buffer);
+ kfree(vb);
+ break;
+ }
+ /*
+ * Call the driver-provided buffer initialization
+ * callback, if given. An error in initialization
+ * results in queue setup failure.
+ */
+ ret = call_vb_qop(vb, buf_init, vb);
+ if (ret) {
+ VB2_DEBUG(1, "buffer %d %p initialization"
+ " failed\n", buffer, vb);
+ __vb2_buf_mem_free(vb);
+ kfree(vb);
+ break;
+ }
+ }
+
+ q->bufs[q->num_buffers + buffer] = vb;
+ }
+
+ __setup_lengths(q, buffer);
+ if (memory == V4L2_MEMORY_MMAP)
+ __setup_offsets(q, buffer);
+
+ VB2_DEBUG(1, "allocated %d buffers, %d plane(s) each\n",
+ buffer, num_planes);
+
+ return buffer;
+}
+
+/**
+ * __vb2_free_mem() - release all video buffer memory for a given queue
+ */
+static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
+{
+ unsigned int buffer;
+ struct vb2_buffer *vb;
+
+ for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
+ ++buffer) {
+ vb = q->bufs[buffer];
+ if (!vb)
+ continue;
+
+ /* Free MMAP buffers or release USERPTR buffers */
+ if (q->memory == V4L2_MEMORY_MMAP)
+ __vb2_buf_mem_free(vb);
+ else if (q->memory == V4L2_MEMORY_DMABUF)
+ __vb2_buf_dmabuf_put(vb);
+ else
+ __vb2_buf_userptr_put(vb);
+ }
+}
+
+/**
+ * __vb2_queue_free() - free buffers at the end of the queue - video memory and
+ * related information, if no buffers are left return the queue to an
+ * uninitialized state. Might be called even if the queue has already been freed.
+ */
+static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
+{
+ unsigned int buffer;
+
+ /*
+ * Sanity check: when preparing a buffer the queue lock is released for
+ * a short while (see __buf_prepare for the details), which would allow
+ * a race with a reqbufs which can call this function. Removing the
+ * buffers from underneath __buf_prepare is obviously a bad idea, so we
+ * check if any of the buffers is in the state PREPARING, and if so we
+ * just return -EAGAIN.
+ */
+ for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
+ ++buffer) {
+ if (q->bufs[buffer] == NULL)
+ continue;
+ if (q->bufs[buffer]->state == VB2_BUF_STATE_PREPARING) {
+ VB2_DEBUG(1, "preparing buffers, cannot free\n");
+ return -EAGAIN;
+ }
+ }
+
+ /* Call driver-provided cleanup function for each buffer, if provided */
+ for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
+ ++buffer) {
+ struct vb2_buffer *vb = q->bufs[buffer];
+
+ if (vb && vb->planes[0].mem_priv)
+ call_void_vb_qop(vb, buf_cleanup, vb);
+ }
+
+ /* Release video buffer memory */
+ __vb2_free_mem(q, buffers);
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ /*
+ * Check that all the calls were balances during the life-time of this
+ * queue. If not (or if the debug level is 1 or up), then dump the
+ * counters to the kernel log.
+ */
+ if (q->num_buffers) {
+ bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming ||
+ q->cnt_wait_prepare != q->cnt_wait_finish;
+
+ if (unbalanced || debug) {
+ pr_info("vb2: counters for queue %p:%s\n", q,
+ unbalanced ? " UNBALANCED!" : "");
+ pr_info("vb2: setup: %u start_streaming: %u stop_streaming: %u\n",
+ q->cnt_queue_setup, q->cnt_start_streaming,
+ q->cnt_stop_streaming);
+ pr_info("vb2: wait_prepare: %u wait_finish: %u\n",
+ q->cnt_wait_prepare, q->cnt_wait_finish);
+ }
+ q->cnt_queue_setup = 0;
+ q->cnt_wait_prepare = 0;
+ q->cnt_wait_finish = 0;
+ q->cnt_start_streaming = 0;
+ q->cnt_stop_streaming = 0;
+ }
+ for (buffer = 0; buffer < q->num_buffers; ++buffer) {
+ struct vb2_buffer *vb = q->bufs[buffer];
+ bool unbalanced = vb->cnt_mem_alloc != vb->cnt_mem_put ||
+ vb->cnt_mem_prepare != vb->cnt_mem_finish ||
+ vb->cnt_mem_get_userptr != vb->cnt_mem_put_userptr ||
+ vb->cnt_mem_attach_dmabuf != vb->cnt_mem_detach_dmabuf ||
+ vb->cnt_mem_map_dmabuf != vb->cnt_mem_unmap_dmabuf ||
+ vb->cnt_buf_queue != vb->cnt_buf_done ||
+ vb->cnt_buf_prepare != vb->cnt_buf_finish ||
+ vb->cnt_buf_init != vb->cnt_buf_cleanup;
+
+ if (unbalanced || debug) {
+ pr_info("vb2: counters for queue %p, buffer %d:%s\n",
+ q, buffer, unbalanced ? " UNBALANCED!" : "");
+ pr_info("vb2: buf_init: %u buf_cleanup: %u buf_prepare: %u buf_finish: %u\n",
+ vb->cnt_buf_init, vb->cnt_buf_cleanup,
+ vb->cnt_buf_prepare, vb->cnt_buf_finish);
+ pr_info("vb2: buf_queue: %u buf_done: %u\n",
+ vb->cnt_buf_queue, vb->cnt_buf_done);
+ pr_info("vb2: alloc: %u put: %u prepare: %u finish: %u mmap: %u\n",
+ vb->cnt_mem_alloc, vb->cnt_mem_put,
+ vb->cnt_mem_prepare, vb->cnt_mem_finish,
+ vb->cnt_mem_mmap);
+ pr_info("vb2: get_userptr: %u put_userptr: %u\n",
+ vb->cnt_mem_get_userptr, vb->cnt_mem_put_userptr);
+ pr_info("vb2: attach_dmabuf: %u detach_dmabuf: %u map_dmabuf: %u unmap_dmabuf: %u\n",
+ vb->cnt_mem_attach_dmabuf, vb->cnt_mem_detach_dmabuf,
+ vb->cnt_mem_map_dmabuf, vb->cnt_mem_unmap_dmabuf);
+ pr_info("vb2: get_dmabuf: %u num_users: %u vaddr: %u cookie: %u\n",
+ vb->cnt_mem_get_dmabuf,
+ vb->cnt_mem_num_users,
+ vb->cnt_mem_vaddr,
+ vb->cnt_mem_cookie);
+ }
+ }
+#endif
+
+ /* Free videobuf buffers */
+ for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
+ ++buffer) {
+ kfree(q->bufs[buffer]);
+ q->bufs[buffer] = NULL;
+ }
+
+ q->num_buffers -= buffers;
+ if (!q->num_buffers) {
+ q->memory = 0;
+ INIT_LIST_HEAD(&q->queued_list);
+ }
+ return 0;
+}
+
+/**
+ * __buffer_in_use() - return true if the buffer is in use and
+ * the queue cannot be freed (by the means of REQBUFS(0)) call
+ */
+bool __buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb)
+{
+ unsigned int plane;
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ void *mem_priv = vb->planes[plane].mem_priv;
+ /*
+ * If num_users() has not been provided, call_memop
+ * will return 0, apparently nobody cares about this
+ * case anyway. If num_users() returns more than 1,
+ * we are not the only user of the plane's memory.
+ */
+ if (mem_priv && call_memop(vb, num_users, mem_priv) > 1)
+ return true;
+ }
+ return false;
+}
+
+/**
+ * __buffers_in_use() - return true if any buffers on the queue are in use and
+ * the queue cannot be freed (by the means of REQBUFS(0)) call
+ */
+static bool __buffers_in_use(struct vb2_queue *q)
+{
+ unsigned int buffer;
+ for (buffer = 0; buffer < q->num_buffers; ++buffer) {
+ if (__buffer_in_use(q, q->bufs[buffer]))
+ return true;
+ }
+ return false;
+}
+
+/**
+ * vb2_core_querybuf() - query video buffer information
+ * @q: videobuf queue
+ * @type: enum v4l2_buf_type; buffer type (type == *_MPLANE for
+ * multiplanar buffers);
+ * @index: id number of the buffer
+ * @pb: private buffer struct passed from userspace to vidioc_querybuf
+ * handler in driver
+ *
+ * Should be called from vidioc_querybuf ioctl handler in driver.
+ * This function will verify the passed v4l2_buffer structure and fill the
+ * relevant information for the userspace.
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_querybuf handler in driver.
+ */
+int vb2_core_querybuf(struct vb2_queue *q, unsigned int type,
+ unsigned int index, void *pb)
+{
+ struct vb2_buffer *vb;
+ int ret;
+
+ if (type != q->type) {
+ VB2_DEBUG(1, "wrong buffer type\n");
+ return -EINVAL;
+ }
+
+ if (index >= q->num_buffers) {
+ VB2_DEBUG(1, "buffer index out of range\n");
+ return -EINVAL;
+ }
+ vb = q->bufs[index];
+ ret = call_bufop(q, verify_planes, vb, pb);
+ if (!ret)
+ ret = call_bufop(q, fill_buffer, vb, pb);
+
+ return ret;
+}
+
+/**
+ * __verify_userptr_ops() - verify that all memory operations required for
+ * USERPTR queue type have been provided
+ */
+static int __verify_userptr_ops(struct vb2_queue *q)
+{
+ if (!(q->io_modes & VB2_USERPTR) || !q->mem_ops->get_userptr ||
+ !q->mem_ops->put_userptr)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * __verify_mmap_ops() - verify that all memory operations required for
+ * MMAP queue type have been provided
+ */
+static int __verify_mmap_ops(struct vb2_queue *q)
+{
+ if (!(q->io_modes & VB2_MMAP) || !q->mem_ops->alloc ||
+ !q->mem_ops->put || !q->mem_ops->mmap)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * __verify_dmabuf_ops() - verify that all memory operations required for
+ * DMABUF queue type have been provided
+ */
+static int __verify_dmabuf_ops(struct vb2_queue *q)
+{
+ if (!(q->io_modes & VB2_DMABUF) || !q->mem_ops->attach_dmabuf ||
+ !q->mem_ops->detach_dmabuf || !q->mem_ops->map_dmabuf ||
+ !q->mem_ops->unmap_dmabuf)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * __verify_memory_type() - Check whether the memory type and buffer type
+ * passed to a buffer operation are compatible with the queue.
+ */
+int __verify_memory_type(struct vb2_queue *q,
+ unsigned int memory, enum v4l2_buf_type type)
+{
+ if (memory != V4L2_MEMORY_MMAP && memory != V4L2_MEMORY_USERPTR &&
+ memory != V4L2_MEMORY_DMABUF) {
+ VB2_DEBUG(1, "unsupported memory type\n");
+ return -EINVAL;
+ }
+
+ if (type != q->type) {
+ VB2_DEBUG(1, "requested type is incorrect\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Make sure all the required memory ops for given memory type
+ * are available.
+ */
+ if (memory == V4L2_MEMORY_MMAP && __verify_mmap_ops(q)) {
+ VB2_DEBUG(1, "MMAP for current setup unsupported\n");
+ return -EINVAL;
+ }
+
+ if (memory == V4L2_MEMORY_USERPTR && __verify_userptr_ops(q)) {
+ VB2_DEBUG(1, "USERPTR for current setup unsupported\n");
+ return -EINVAL;
+ }
+
+ if (memory == V4L2_MEMORY_DMABUF && __verify_dmabuf_ops(q)) {
+ VB2_DEBUG(1, "DMABUF for current setup unsupported\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Place the busy tests at the end: -EBUSY can be ignored when
+ * create_bufs is called with count == 0, but count == 0 should still
+ * do the memory and type validation.
+ */
+ if (vb2_fileio_is_active(q)) {
+ VB2_DEBUG(1, "file io in progress\n");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+
+/**
+ * vb2_core_reqbufs() - Initiate streaming
+ * @q: videobuf2 queue
+ * @req: struct passed from userspace to vidioc_reqbufs handler in driver
+ *
+ * Should be called from vidioc_reqbufs ioctl handler of a driver.
+ * This function:
+ * 1) verifies streaming parameters passed from the userspace,
+ * 2) sets up the queue,
+ * 3) negotiates number of buffers and planes per buffer with the driver
+ * to be used during streaming,
+ * 4) allocates internal buffer structures (struct vb2_buffer), according to
+ * the agreed parameters,
+ * 5) for MMAP memory type, allocates actual video memory, using the
+ * memory handling/allocation routines provided during queue initialization
+ *
+ * If req->count is 0, all the memory will be freed instead.
+ * If the queue has been allocated previously (by a previous vb2_reqbufs) call
+ * and the queue is not busy, memory will be reallocated.
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_reqbufs handler in driver.
+ */
+int vb2_core_reqbufs(struct vb2_queue *q, unsigned int memory, unsigned int *count)
+{
+ unsigned int num_buffers, allocated_buffers, num_planes = 0;
+ int ret;
+
+ if (q->streaming) {
+ VB2_DEBUG(1, "streaming active\n");
+ return -EBUSY;
+ }
+
+ if (*count == 0 || q->num_buffers != 0 || q->memory != memory) {
+ /*
+ * We already have buffers allocated, so first check if they
+ * are not in use and can be freed.
+ */
+ mutex_lock(&q->mmap_lock);
+ if (q->memory == V4L2_MEMORY_MMAP && __buffers_in_use(q)) {
+ mutex_unlock(&q->mmap_lock);
+ VB2_DEBUG(1, "memory in use, cannot free\n");
+ return -EBUSY;
+ }
+
+ /*
+ * Call queue_cancel to clean up any buffers in the PREPARED or
+ * QUEUED state which is possible if buffers were prepared or
+ * queued without ever calling STREAMON.
+ */
+ __vb2_queue_cancel(q);
+ ret = __vb2_queue_free(q, q->num_buffers);
+ mutex_unlock(&q->mmap_lock);
+ if (ret)
+ return ret;
+
+ /*
+ * In case of REQBUFS(0) return immediately without calling
+ * driver's queue_setup() callback and allocating resources.
+ */
+ if (*count == 0)
+ return 0;
+ }
+
+ /*
+ * Make sure the requested values and current defaults are sane.
+ */
+ num_buffers = min_t(unsigned int, *count, VIDEO_MAX_FRAME);
+ num_buffers = max_t(unsigned int, num_buffers, q->min_buffers_needed);
+ memset(q->plane_sizes, 0, sizeof(q->plane_sizes));
+ memset(q->alloc_ctx, 0, sizeof(q->alloc_ctx));
+ q->memory = memory;
+
+ /*
+ * Ask the driver how many buffers and planes per buffer it requires.
+ * Driver also sets the size and allocator context for each plane.
+ */
+ ret = call_qop(q, queue_setup, q, NULL, &num_buffers, &num_planes,
+ q->plane_sizes, q->alloc_ctx);
+ if (ret)
+ return ret;
+
+ /* Finally, allocate buffers and video memory */
+ allocated_buffers = __vb2_queue_alloc(q, memory, num_buffers, num_planes);
+ if (allocated_buffers == 0) {
+ VB2_DEBUG(1, "memory allocation failed\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * There is no point in continuing if we can't allocate the minimum
+ * number of buffers needed by this vb2_queue.
+ */
+ if (allocated_buffers < q->min_buffers_needed)
+ ret = -ENOMEM;
+
+ /*
+ * Check if driver can handle the allocated number of buffers.
+ */
+ if (!ret && allocated_buffers < num_buffers) {
+ num_buffers = allocated_buffers;
+
+ ret = call_qop(q, queue_setup, q, NULL, &num_buffers,
+ &num_planes, q->plane_sizes, q->alloc_ctx);
+
+ if (!ret && allocated_buffers < num_buffers)
+ ret = -ENOMEM;
+
+ /*
+ * Either the driver has accepted a smaller number of buffers,
+ * or .queue_setup() returned an error
+ */
+ }
+
+ mutex_lock(&q->mmap_lock);
+ q->num_buffers = allocated_buffers;
+
+ if (ret < 0) {
+ /*
+ * Note: __vb2_queue_free() will subtract 'allocated_buffers'
+ * from q->num_buffers.
+ */
+ __vb2_queue_free(q, allocated_buffers);
+ mutex_unlock(&q->mmap_lock);
+ return ret;
+ }
+ mutex_unlock(&q->mmap_lock);
+
+ /*
+ * Return the number of successfully allocated buffers
+ * to the userspace.
+ */
+ *count = allocated_buffers;
+ q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
+
+ return 0;
+}
+
+/**
+ * vb2_core_create_bufs() - Allocate buffers and any required auxiliary structs
+ * @q: videobuf2 queue
+ * @create: creation parameters, passed from userspace to vidioc_create_bufs
+ * handler in driver
+ *
+ * Should be called from vidioc_create_bufs ioctl handler of a driver.
+ * This function:
+ * 1) verifies parameter sanity
+ * 2) calls the .queue_setup() queue operation
+ * 3) performs any necessary memory allocations
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_create_bufs handler in driver.
+ */
+int vb2_core_create_bufs(struct vb2_queue *q, unsigned int memory,
+ unsigned int *count, void *parg)
+{
+ unsigned int num_planes = 0, num_buffers, allocated_buffers;
+ int ret;
+
+ if (q->num_buffers == VIDEO_MAX_FRAME) {
+ VB2_DEBUG(1, "maximum number of buffers already allocated\n");
+ return -ENOBUFS;
+ }
+
+ if (!q->num_buffers) {
+ memset(q->plane_sizes, 0, sizeof(q->plane_sizes));
+ memset(q->alloc_ctx, 0, sizeof(q->alloc_ctx));
+ q->memory = memory;
+ q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
+ }
+
+ num_buffers = min(*count, VIDEO_MAX_FRAME - q->num_buffers);
+
+ /*
+ * Ask the driver, whether the requested number of buffers, planes per
+ * buffer and their sizes are acceptable
+ */
+ ret = call_qop(q, queue_setup, q, parg, &num_buffers,
+ &num_planes, q->plane_sizes, q->alloc_ctx);
+ if (ret)
+ return ret;
+
+ /* Finally, allocate buffers and video memory */
+ allocated_buffers = __vb2_queue_alloc(q, memory, num_buffers,
+ num_planes);
+ if (allocated_buffers == 0) {
+ VB2_DEBUG(1, "memory allocation failed\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * Check if driver can handle the so far allocated number of buffers.
+ */
+ if (allocated_buffers < num_buffers) {
+ num_buffers = allocated_buffers;
+
+ /*
+ * q->num_buffers contains the total number of buffers, that the
+ * queue driver has set up
+ */
+ ret = call_qop(q, queue_setup, q, parg, &num_buffers,
+ &num_planes, q->plane_sizes, q->alloc_ctx);
+
+ if (!ret && allocated_buffers < num_buffers)
+ ret = -ENOMEM;
+
+ /*
+ * Either the driver has accepted a smaller number of buffers,
+ * or .queue_setup() returned an error
+ */
+ }
+
+ mutex_lock(&q->mmap_lock);
+ q->num_buffers += allocated_buffers;
+
+ if (ret < 0) {
+ /*
+ * Note: __vb2_queue_free() will subtract 'allocated_buffers'
+ * from q->num_buffers.
+ */
+ __vb2_queue_free(q, allocated_buffers);
+ mutex_unlock(&q->mmap_lock);
+ return -ENOMEM;
+ }
+ mutex_unlock(&q->mmap_lock);
+
+ /*
+ * Return the number of successfully allocated buffers
+ * to the userspace.
+ */
+ *count = allocated_buffers;
+
+ return 0;
+}
+
+/**
+ * vb2_plane_vaddr() - Return a kernel virtual address of a given plane
+ * @vb: vb2_buffer to which the plane in question belongs to
+ * @plane_no: plane number for which the address is to be returned
+ *
+ * This function returns a kernel virtual address of a given plane if
+ * such a mapping exist, NULL otherwise.
+ */
+void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no)
+{
+ if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)
+ return NULL;
+
+ return call_ptr_memop(vb, vaddr, vb->planes[plane_no].mem_priv);
+
+}
+EXPORT_SYMBOL_GPL(vb2_plane_vaddr);
+
+/**
+ * vb2_plane_cookie() - Return allocator specific cookie for the given plane
+ * @vb: vb2_buffer to which the plane in question belongs to
+ * @plane_no: plane number for which the cookie is to be returned
+ *
+ * This function returns an allocator specific cookie for a given plane if
+ * available, NULL otherwise. The allocator should provide some simple static
+ * inline function, which would convert this cookie to the allocator specific
+ * type that can be used directly by the driver to access the buffer. This can
+ * be for example physical address, pointer to scatter list or IOMMU mapping.
+ */
+void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no)
+{
+ if (plane_no >= vb->num_planes || !vb->planes[plane_no].mem_priv)
+ return NULL;
+
+ return call_ptr_memop(vb, cookie, vb->planes[plane_no].mem_priv);
+}
+EXPORT_SYMBOL_GPL(vb2_plane_cookie);
+
+/**
+ * vb2_buffer_done() - inform videobuf that an operation on a buffer is finished
+ * @vb: vb2_buffer returned from the driver
+ * @state: either VB2_BUF_STATE_DONE if the operation finished successfully,
+ * VB2_BUF_STATE_ERROR if the operation finished with an error or
+ * VB2_BUF_STATE_QUEUED if the driver wants to requeue buffers.
+ * If start_streaming fails then it should return buffers with state
+ * VB2_BUF_STATE_QUEUED to put them back into the queue.
+ *
+ * This function should be called by the driver after a hardware operation on
+ * a buffer is finished and the buffer may be returned to userspace. The driver
+ * cannot use this buffer anymore until it is queued back to it by videobuf
+ * by the means of buf_queue callback. Only buffers previously queued to the
+ * driver by buf_queue can be passed to this function.
+ *
+ * While streaming a buffer can only be returned in state DONE or ERROR.
+ * The start_streaming op can also return them in case the DMA engine cannot
+ * be started for some reason. In that case the buffers should be returned with
+ * state QUEUED.
+ */
+void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ unsigned long flags;
+ unsigned int plane;
+
+ if (WARN_ON(vb->state != VB2_BUF_STATE_ACTIVE))
+ return;
+
+ if (WARN_ON(state != VB2_BUF_STATE_DONE &&
+ state != VB2_BUF_STATE_ERROR &&
+ state != VB2_BUF_STATE_QUEUED))
+ state = VB2_BUF_STATE_ERROR;
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ /*
+ * Although this is not a callback, it still does have to balance
+ * with the buf_queue op. So update this counter manually.
+ */
+ vb->cnt_buf_done++;
+#endif
+ VB2_DEBUG(4, "done processing on buffer %d, state: %d\n",
+ vb2_index(vb), state);
+
+ /* sync buffers */
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ call_void_memop(vb, finish, vb->planes[plane].mem_priv);
+
+ /* Add the buffer to the done buffers list */
+ spin_lock_irqsave(&q->done_lock, flags);
+ vb->state = state;
+ if (state != VB2_BUF_STATE_QUEUED)
+ list_add_tail(&vb->done_entry, &q->done_list);
+ atomic_dec(&q->owned_by_drv_count);
+ spin_unlock_irqrestore(&q->done_lock, flags);
+
+ trace_vb2_buf_done(q, vb);
+
+ if (state == VB2_BUF_STATE_QUEUED) {
+ if (q->start_streaming_called)
+ __enqueue_in_driver(vb);
+ return;
+ }
+
+ /* Inform any processes that may be waiting for buffers */
+ wake_up(&q->done_wq);
+}
+EXPORT_SYMBOL_GPL(vb2_buffer_done);
+
+/**
+ * vb2_discard_done() - discard all buffers marked as DONE
+ * @q: videobuf2 queue
+ *
+ * This function is intended to be used with suspend/resume operations. It
+ * discards all 'done' buffers as they would be too old to be requested after
+ * resume.
+ *
+ * Drivers must stop the hardware and synchronize with interrupt handlers and/or
+ * delayed works before calling this function to make sure no buffer will be
+ * touched by the driver and/or hardware.
+ */
+void vb2_discard_done(struct vb2_queue *q)
+{
+ struct vb2_buffer *vb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&q->done_lock, flags);
+ list_for_each_entry(vb, &q->done_list, done_entry)
+ vb->state = VB2_BUF_STATE_ERROR;
+ spin_unlock_irqrestore(&q->done_lock, flags);
+}
+EXPORT_SYMBOL_GPL(vb2_discard_done);
+
+/**
+ * __enqueue_in_driver() - enqueue a vb2_buffer in driver for processing
+ */
+static void __enqueue_in_driver(struct vb2_buffer *vb)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ unsigned int plane;
+
+ vb->state = VB2_BUF_STATE_ACTIVE;
+ atomic_inc(&q->owned_by_drv_count);
+
+ trace_vb2_buf_queue(q, vb);
+
+ /* sync buffers */
+ for (plane = 0; plane < vb->num_planes; ++plane)
+ call_void_memop(vb, prepare, vb->planes[plane].mem_priv);
+
+ call_void_vb_qop(vb, buf_queue, vb);
+}
+
+static int vb2_queue_or_prepare_buf(struct vb2_queue *q, unsigned int memory,
+ unsigned int type, unsigned int index, void *pb,
+ const char *opname)
+{
+ if (type != q->type) {
+ VB2_DEBUG(1, "%s: invalid buffer type\n", opname);
+ return -EINVAL;
+ }
+
+ if (index >= q->num_buffers) {
+ VB2_DEBUG(1, "%s: buffer index out of range\n", opname);
+ return -EINVAL;
+ }
+
+ if (q->bufs[index] == NULL) {
+ /* Should never happen */
+ VB2_DEBUG(1, "%s: buffer is NULL\n", opname);
+ return -EINVAL;
+ }
+
+ if (memory != q->memory) {
+ VB2_DEBUG(1, "%s: invalid memory type\n", opname);
+ return -EINVAL;
+ }
+
+ return call_bufop(q, verify_planes, q->bufs[index], pb);
+}
+
+/**
+ * vb2_core_prepare_buf() - Pass ownership of a buffer from userspace to the kernel
+ * @q: videobuf2 queue
+ * @b: buffer structure passed from userspace to vidioc_prepare_buf
+ * handler in driver
+ *
+ * Should be called from vidioc_prepare_buf ioctl handler of a driver.
+ * This function:
+ * 1) verifies the passed buffer,
+ * 2) calls buf_prepare callback in the driver (if provided), in which
+ * driver-specific buffer initialization can be performed,
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_prepare_buf handler in driver.
+ */
+int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int memory,
+ unsigned int type, unsigned int index, void *pb)
+{
+ struct vb2_buffer *vb;
+ int ret;
+
+ if (vb2_fileio_is_active(q)) {
+ VB2_DEBUG(1, "file io in progress\n");
+ return -EBUSY;
+ }
+
+ ret = vb2_queue_or_prepare_buf(q, memory, type, index, pb,
+ "prepare_buf");
+ if (ret)
+ return ret;
+
+ vb = q->bufs[index];
+ if (vb->state != VB2_BUF_STATE_DEQUEUED) {
+ VB2_DEBUG(1, "invalid buffer state %d\n",
+ vb->state);
+ return -EINVAL;
+ }
+
+ ret = call_bufop(q, prepare_buffer, vb, pb);
+ if (!ret) {
+ /* Fill buffer information for the userspace */
+ call_bufop(q, fill_buffer, vb, pb);
+ VB2_DEBUG(1, "prepare of buffer %d succeeded\n",
+ vb2_index(vb));
+ }
+ return ret;
+}
+
+/**
+ * vb2_start_streaming() - Attempt to start streaming.
+ * @q: videobuf2 queue
+ *
+ * Attempt to start streaming. When this function is called there must be
+ * at least q->min_buffers_needed buffers queued up (i.e. the minimum
+ * number of buffers required for the DMA engine to function). If the
+ * @start_streaming op fails it is supposed to return all the driver-owned
+ * buffers back to vb2 in state QUEUED. Check if that happened and if
+ * not warn and reclaim them forcefully.
+ */
+static int vb2_start_streaming(struct vb2_queue *q)
+{
+ struct vb2_buffer *vb;
+ int ret;
+
+ /*
+ * If any buffers were queued before streamon,
+ * we can now pass them to driver for processing.
+ */
+ list_for_each_entry(vb, &q->queued_list, queued_entry)
+ __enqueue_in_driver(vb);
+
+ /* Tell the driver to start streaming */
+ q->start_streaming_called = 1;
+ ret = call_qop(q, start_streaming, q,
+ atomic_read(&q->owned_by_drv_count));
+ if (!ret)
+ return 0;
+
+ q->start_streaming_called = 0;
+
+ VB2_DEBUG(1, "driver refused to start streaming\n");
+ /*
+ * If you see this warning, then the driver isn't cleaning up properly
+ * after a failed start_streaming(). See the start_streaming()
+ * documentation in videobuf2-core.h for more information how buffers
+ * should be returned to vb2 in start_streaming().
+ */
+ if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
+ unsigned i;
+
+ /*
+ * Forcefully reclaim buffers if the driver did not
+ * correctly return them to vb2.
+ */
+ for (i = 0; i < q->num_buffers; ++i) {
+ vb = q->bufs[i];
+ if (vb->state == VB2_BUF_STATE_ACTIVE)
+ vb2_buffer_done(vb, VB2_BUF_STATE_QUEUED);
+ }
+ /* Must be zero now */
+ WARN_ON(atomic_read(&q->owned_by_drv_count));
+ }
+ /*
+ * If done_list is not empty, then start_streaming() didn't call
+ * vb2_buffer_done(vb, VB2_BUF_STATE_QUEUED) but STATE_ERROR or
+ * STATE_DONE.
+ */
+ WARN_ON(!list_empty(&q->done_list));
+ return ret;
+}
+
+int vb2_core_qbuf(struct vb2_queue *q, unsigned int memory,
+ unsigned int type, unsigned int index, void *pb)
+{
+ int ret = vb2_queue_or_prepare_buf(q, memory, type, index, pb, "qbuf");
+ struct vb2_buffer *vb;
+
+ if (ret)
+ return ret;
+
+ vb = q->bufs[index];
+
+ switch (vb->state) {
+ case VB2_BUF_STATE_DEQUEUED:
+ ret = call_bufop(q, prepare_buffer, vb, pb);
+ if (ret)
+ return ret;
+ break;
+ case VB2_BUF_STATE_PREPARED:
+ break;
+ case VB2_BUF_STATE_PREPARING:
+ VB2_DEBUG(1, "buffer still being prepared\n");
+ return -EINVAL;
+ default:
+ VB2_DEBUG(1, "invalid buffer state %d\n", vb->state);
+ return -EINVAL;
+ }
+
+ /*
+ * Add to the queued buffers list, a buffer will stay on it until
+ * dequeued in dqbuf.
+ */
+ list_add_tail(&vb->queued_entry, &q->queued_list);
+ q->queued_count++;
+ q->waiting_for_buffers = false;
+ vb->state = VB2_BUF_STATE_QUEUED;
+ if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+ /*
+ * For output buffers copy the timestamp if needed,
+ * and the timecode field and flag if needed.
+ */
+ call_bufop(q, set_timestamp, vb, pb);
+ }
+
+ trace_vb2_qbuf(q, vb);
+
+ /*
+ * If already streaming, give the buffer to driver for processing.
+ * If not, the buffer will be given to driver on next streamon.
+ */
+ if (q->start_streaming_called)
+ __enqueue_in_driver(vb);
+
+ /* Fill buffer information for the userspace */
+ call_bufop(q, fill_buffer, vb, pb);
+
+ /*
+ * If streamon has been called, and we haven't yet called
+ * start_streaming() since not enough buffers were queued, and
+ * we now have reached the minimum number of queued buffers,
+ * then we can finally call start_streaming().
+ */
+ if (q->streaming && !q->start_streaming_called &&
+ q->queued_count >= q->min_buffers_needed) {
+ ret = vb2_start_streaming(q);
+ if (ret)
+ return ret;
+ }
+
+ VB2_DEBUG(1, "qbuf of buffer %d succeeded\n", vb2_index(vb));
+ return 0;
+}
+
+/**
+ * __vb2_wait_for_done_vb() - wait for a buffer to become available
+ * for dequeuing
+ *
+ * Will sleep if required for nonblocking == false.
+ */
+static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
+{
+ /*
+ * All operations on vb_done_list are performed under done_lock
+ * spinlock protection. However, buffers may be removed from
+ * it and returned to userspace only while holding both driver's
+ * lock and the done_lock spinlock. Thus we can be sure that as
+ * long as we hold the driver's lock, the list will remain not
+ * empty if list_empty() check succeeds.
+ */
+
+ for (;;) {
+ int ret;
+
+ if (!q->streaming) {
+ VB2_DEBUG(1, "streaming off, will not wait for buffers\n");
+ return -EINVAL;
+ }
+
+ if (q->error) {
+ VB2_DEBUG(1, "Queue in error state, will not wait for buffers\n");
+ return -EIO;
+ }
+
+ if (q->last_buffer_dequeued) {
+ VB2_DEBUG(3, "last buffer dequeued already, will not wait for buffers\n");
+ return -EPIPE;
+ }
+
+ if (!list_empty(&q->done_list)) {
+ /*
+ * Found a buffer that we were waiting for.
+ */
+ break;
+ }
+
+ if (nonblocking) {
+ VB2_DEBUG(1, "nonblocking and no buffers to dequeue, "
+ "will not wait\n");
+ return -EAGAIN;
+ }
+
+ /*
+ * We are streaming and blocking, wait for another buffer to
+ * become ready or for streamoff. Driver's lock is released to
+ * allow streamoff or qbuf to be called while waiting.
+ */
+ call_void_qop(q, wait_prepare, q);
+
+ /*
+ * All locks have been released, it is safe to sleep now.
+ */
+ VB2_DEBUG(3, "will sleep waiting for buffers\n");
+ ret = wait_event_interruptible(q->done_wq,
+ !list_empty(&q->done_list) || !q->streaming ||
+ q->error);
+
+ /*
+ * We need to reevaluate both conditions again after reacquiring
+ * the locks or return an error if one occurred.
+ */
+ call_void_qop(q, wait_finish, q);
+ if (ret) {
+ VB2_DEBUG(1, "sleep was interrupted\n");
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/**
+ * __vb2_get_done_vb() - get a buffer ready for dequeuing
+ *
+ * Will sleep if required for nonblocking == false.
+ */
+static int __vb2_get_done_vb(struct vb2_queue *q, struct vb2_buffer **vb,
+ void *pb, int nonblocking)
+{
+ unsigned long flags;
+ int ret;
+
+ /*
+ * Wait for at least one buffer to become available on the done_list.
+ */
+ ret = __vb2_wait_for_done_vb(q, nonblocking);
+ if (ret)
+ return ret;
+
+ /*
+ * Driver's lock has been held since we last verified that done_list
+ * is not empty, so no need for another list_empty(done_list) check.
+ */
+ spin_lock_irqsave(&q->done_lock, flags);
+ *vb = list_first_entry(&q->done_list, struct vb2_buffer, done_entry);
+ /*
+ * Only remove the buffer from done_list if v4l2_buffer can handle all
+ * the planes.
+ */
+ call_bufop(q, verify_planes, *vb, pb);
+
+ if (!ret)
+ list_del(&(*vb)->done_entry);
+ spin_unlock_irqrestore(&q->done_lock, flags);
+
+ return ret;
+}
+
+/**
+ * vb2_wait_for_all_buffers() - wait until all buffers are given back to vb2
+ * @q: videobuf2 queue
+ *
+ * This function will wait until all buffers that have been given to the driver
+ * by buf_queue() are given back to vb2 with vb2_buffer_done(). It doesn't call
+ * wait_prepare, wait_finish pair. It is intended to be called with all locks
+ * taken, for example from stop_streaming() callback.
+ */
+int vb2_wait_for_all_buffers(struct vb2_queue *q)
+{
+ if (!q->streaming) {
+ VB2_DEBUG(1, "streaming off, will not wait for buffers\n");
+ return -EINVAL;
+ }
+
+ if (q->start_streaming_called)
+ wait_event(q->done_wq, !atomic_read(&q->owned_by_drv_count));
+ return 0;
+}
+EXPORT_SYMBOL_GPL(vb2_wait_for_all_buffers);
+
+/**
+ * __vb2_dqbuf() - bring back the buffer to the DEQUEUED state
+ */
+static void __vb2_dqbuf(struct vb2_buffer *vb)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ unsigned int i;
+
+ /* nothing to do if the buffer is already dequeued */
+ if (vb->state == VB2_BUF_STATE_DEQUEUED)
+ return;
+
+ vb->state = VB2_BUF_STATE_DEQUEUED;
+
+ /* unmap DMABUF buffer */
+ if (q->memory == V4L2_MEMORY_DMABUF)
+ for (i = 0; i < vb->num_planes; ++i) {
+ if (!vb->planes[i].dbuf_mapped)
+ continue;
+ call_void_memop(vb, unmap_dmabuf, vb->planes[i].mem_priv);
+ vb->planes[i].dbuf_mapped = 0;
+ }
+}
+
+int vb2_core_dqbuf(struct vb2_queue *q, unsigned int type, void *pb,
+ bool nonblocking)
+{
+ struct vb2_buffer *vb = NULL;
+ int ret;
+
+ if (type != q->type) {
+ VB2_DEBUG(1, "invalid buffer type\n");
+ return -EINVAL;
+ }
+ ret = __vb2_get_done_vb(q, &vb, pb, nonblocking);
+ if (ret < 0)
+ return ret;
+
+ switch (vb->state) {
+ case VB2_BUF_STATE_DONE:
+ VB2_DEBUG(3, "returning done buffer\n");
+ break;
+ case VB2_BUF_STATE_ERROR:
+ VB2_DEBUG(3, "returning done buffer with errors\n");
+ break;
+ default:
+ VB2_DEBUG(1, "invalid buffer state\n");
+ return -EINVAL;
+ }
+
+ call_void_vb_qop(vb, buf_finish, vb);
+
+ /* Fill buffer information for the userspace */
+ call_bufop(q, fill_buffer, vb, pb);
+ /* Remove from videobuf queue */
+ list_del(&vb->queued_entry);
+ q->queued_count--;
+
+ trace_vb2_dqbuf(q, vb);
+
+ if (!V4L2_TYPE_IS_OUTPUT(q->type) && call_bufop(q, is_last, vb))
+ q->last_buffer_dequeued = true;
+ /* go back to dequeued state */
+ __vb2_dqbuf(vb);
+
+ VB2_DEBUG(1, "dqbuf of buffer %d, with state %d\n",
+ vb2_index(vb), vb->state);
+
+ return 0;
+}
+
+/**
+ * __vb2_queue_cancel() - cancel and stop (pause) streaming
+ *
+ * Removes all queued buffers from driver's queue and all buffers queued by
+ * userspace from videobuf's queue. Returns to state after reqbufs.
+ */
+static void __vb2_queue_cancel(struct vb2_queue *q)
+{
+ unsigned int i;
+
+ /*
+ * Tell driver to stop all transactions and release all queued
+ * buffers.
+ */
+ if (q->start_streaming_called)
+ call_void_qop(q, stop_streaming, q);
+
+ /*
+ * If you see this warning, then the driver isn't cleaning up properly
+ * in stop_streaming(). See the stop_streaming() documentation in
+ * videobuf2-core.h for more information how buffers should be returned
+ * to vb2 in stop_streaming().
+ */
+ if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
+ for (i = 0; i < q->num_buffers; ++i)
+ if (q->bufs[i]->state == VB2_BUF_STATE_ACTIVE)
+ vb2_buffer_done(q->bufs[i], VB2_BUF_STATE_ERROR);
+ /* Must be zero now */
+ WARN_ON(atomic_read(&q->owned_by_drv_count));
+ }
+
+ q->streaming = 0;
+ q->start_streaming_called = 0;
+ q->queued_count = 0;
+ q->error = 0;
+
+ /*
+ * Remove all buffers from videobuf's list...
+ */
+ INIT_LIST_HEAD(&q->queued_list);
+ /*
+ * ...and done list; userspace will not receive any buffers it
+ * has not already dequeued before initiating cancel.
+ */
+ INIT_LIST_HEAD(&q->done_list);
+ atomic_set(&q->owned_by_drv_count, 0);
+ wake_up_all(&q->done_wq);
+
+ /*
+ * Reinitialize all buffers for next use.
+ * Make sure to call buf_finish for any queued buffers. Normally
+ * that's done in dqbuf, but that's not going to happen when we
+ * cancel the whole queue. Note: this code belongs here, not in
+ * __vb2_dqbuf() since in vb2_internal_dqbuf() there is a critical
+ * call to __fill_v4l2_buffer() after buf_finish(). That order can't
+ * be changed, so we can't move the buf_finish() to __vb2_dqbuf().
+ */
+ for (i = 0; i < q->num_buffers; ++i) {
+ struct vb2_buffer *vb = q->bufs[i];
+
+ if (vb->state != VB2_BUF_STATE_DEQUEUED) {
+ vb->state = VB2_BUF_STATE_PREPARED;
+ call_void_vb_qop(vb, buf_finish, vb);
+ }
+ __vb2_dqbuf(vb);
+ }
+}
+
+int vb2_core_streamon(struct vb2_queue *q, unsigned int type)
+{
+ int ret;
+
+ if (type != q->type) {
+ VB2_DEBUG(1, "invalid stream type\n");
+ return -EINVAL;
+ }
+
+ if (q->streaming) {
+ VB2_DEBUG(3, "already streaming\n");
+ return 0;
+ }
+
+ if (!q->num_buffers) {
+ VB2_DEBUG(1, "no buffers have been allocated\n");
+ return -EINVAL;
+ }
+
+ if (q->num_buffers < q->min_buffers_needed) {
+ VB2_DEBUG(1, "need at least %u allocated buffers\n",
+ q->min_buffers_needed);
+ return -EINVAL;
+ }
+
+ /*
+ * Tell driver to start streaming provided sufficient buffers
+ * are available.
+ */
+ if (q->queued_count >= q->min_buffers_needed) {
+ ret = vb2_start_streaming(q);
+ if (ret) {
+ __vb2_queue_cancel(q);
+ return ret;
+ }
+ }
+
+ q->streaming = 1;
+
+ VB2_DEBUG(3, "successful\n");
+ return 0;
+}
+
+/**
+ * vb2_queue_error() - signal a fatal error on the queue
+ * @q: videobuf2 queue
+ *
+ * Flag that a fatal unrecoverable error has occurred and wake up all processes
+ * waiting on the queue. Polling will now set POLLERR and queuing and dequeuing
+ * buffers will return -EIO.
+ *
+ * The error flag will be cleared when cancelling the queue, either from
+ * vb2_streamoff or vb2_queue_release. Drivers should thus not call this
+ * function before starting the stream, otherwise the error flag will remain set
+ * until the queue is released when closing the device node.
+ */
+void vb2_queue_error(struct vb2_queue *q)
+{
+ q->error = 1;
+
+ wake_up_all(&q->done_wq);
+}
+EXPORT_SYMBOL_GPL(vb2_queue_error);
+
+int vb2_core_streamoff(struct vb2_queue *q, unsigned int type)
+{
+ if (type != q->type) {
+ VB2_DEBUG(1, "invalid stream type\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Cancel will pause streaming and remove all buffers from the driver
+ * and videobuf, effectively returning control over them to userspace.
+ *
+ * Note that we do this even if q->streaming == 0: if you prepare or
+ * queue buffers, and then call streamoff without ever having called
+ * streamon, you would still expect those buffers to be returned to
+ * their normal dequeued state.
+ */
+ __vb2_queue_cancel(q);
+ q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
+ q->last_buffer_dequeued = false;
+
+ VB2_DEBUG(3, "successful\n");
+ return 0;
+}
+
+/**
+ * __find_plane_by_offset() - find plane associated with the given offset off
+ */
+static int __find_plane_by_offset(struct vb2_queue *q, unsigned long off,
+ unsigned int *_buffer, unsigned int *_plane)
+{
+ struct vb2_buffer *vb;
+ unsigned int buffer, plane;
+
+ /*
+ * Go over all buffers and their planes, comparing the given offset
+ * with an offset assigned to each plane. If a match is found,
+ * return its buffer and plane numbers.
+ */
+ for (buffer = 0; buffer < q->num_buffers; ++buffer) {
+ vb = q->bufs[buffer];
+
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ if (call_bufop(q, get_plane_offset, vb, plane) == off) {
+ *_buffer = buffer;
+ *_plane = plane;
+ return 0;
+ }
+ }
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * vb2_core_expbuf() - Export a buffer as a file descriptor
+ * @q: videobuf2 queue
+ * @eb: export buffer structure passed from userspace to vidioc_expbuf
+ * handler in driver
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_expbuf handler in driver.
+ */
+int vb2_core_expbuf(struct vb2_queue *q, unsigned int type, unsigned int index,
+ unsigned int plane, unsigned int flags)
+{
+ struct vb2_buffer *vb = NULL;
+ struct vb2_plane *vb_plane;
+ int ret;
+ struct dma_buf *dbuf;
+
+ if (q->memory != V4L2_MEMORY_MMAP) {
+ VB2_DEBUG(1, "queue is not currently set up for mmap\n");
+ return -EINVAL;
+ }
+
+ if (!q->mem_ops->get_dmabuf) {
+ VB2_DEBUG(1, "queue does not support DMA buffer exporting\n");
+ return -EINVAL;
+ }
+
+ if (flags & ~(O_CLOEXEC | O_ACCMODE)) {
+ VB2_DEBUG(1, "queue does support only O_CLOEXEC and access mode flags\n");
+ return -EINVAL;
+ }
+
+ if (type != q->type) {
+ VB2_DEBUG(1, "invalid buffer type\n");
+ return -EINVAL;
+ }
+
+ if (index >= q->num_buffers) {
+ VB2_DEBUG(1, "buffer index out of range\n");
+ return -EINVAL;
+ }
+
+ vb = q->bufs[index];
+
+ if (plane >= vb->num_planes) {
+ VB2_DEBUG(1, "buffer plane out of range\n");
+ return -EINVAL;
+ }
+
+ if (vb2_fileio_is_active(q)) {
+ VB2_DEBUG(1, "expbuf: file io in progress\n");
+ return -EBUSY;
+ }
+
+ vb_plane = &vb->planes[plane];
+
+ dbuf = call_ptr_memop(vb, get_dmabuf, vb_plane->mem_priv, flags & O_ACCMODE);
+ if (IS_ERR_OR_NULL(dbuf)) {
+ VB2_DEBUG(1, "failed to export buffer %d, plane %d\n", index, plane);
+ return -EINVAL;
+ }
+
+ ret = dma_buf_fd(dbuf, flags & ~O_ACCMODE);
+ if (ret < 0) {
+ VB2_DEBUG(3, "buffer %d, plane %d failed to export (%d)\n",
+ index, plane, ret);
+ dma_buf_put(dbuf);
+ return ret;
+ }
+
+ VB2_DEBUG(3, "buffer %d, plane %d exported as %d descriptor\n",
+ index, plane, ret);
+
+ return ret;
+}
+
+/**
+ * vb2_mmap() - map video buffers into application address space
+ * @q: videobuf2 queue
+ * @vma: vma passed to the mmap file operation handler in the driver
+ *
+ * Should be called from mmap file operation handler of a driver.
+ * This function maps one plane of one of the available video buffers to
+ * userspace. To map whole video memory allocated on reqbufs, this function
+ * has to be called once per each plane per each buffer previously allocated.
+ *
+ * When the userspace application calls mmap, it passes to it an offset returned
+ * to it earlier by the means of vidioc_querybuf handler. That offset acts as
+ * a "cookie", which is then used to identify the plane to be mapped.
+ * This function finds a plane with a matching offset and a mapping is performed
+ * by the means of a provided memory operation.
+ *
+ * The return values from this function are intended to be directly returned
+ * from the mmap handler in driver.
+ */
+int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
+{
+ unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
+ struct vb2_buffer *vb;
+ unsigned int buffer = 0, plane = 0;
+ int ret;
+ unsigned long length;
+
+ if (q->memory != V4L2_MEMORY_MMAP) {
+ VB2_DEBUG(1, "queue is not currently set up for mmap\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Check memory area access mode.
+ */
+ if (!(vma->vm_flags & VM_SHARED)) {
+ VB2_DEBUG(1, "invalid vma flags, VM_SHARED needed\n");
+ return -EINVAL;
+ }
+ if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+ if (!(vma->vm_flags & VM_WRITE)) {
+ VB2_DEBUG(1, "invalid vma flags, VM_WRITE needed\n");
+ return -EINVAL;
+ }
+ } else {
+ if (!(vma->vm_flags & VM_READ)) {
+ VB2_DEBUG(1, "invalid vma flags, VM_READ needed\n");
+ return -EINVAL;
+ }
+ }
+ if (vb2_fileio_is_active(q)) {
+ VB2_DEBUG(1, "mmap: file io in progress\n");
+ return -EBUSY;
+ }
+
+ /*
+ * Find the plane corresponding to the offset passed by userspace.
+ */
+ ret = __find_plane_by_offset(q, off, &buffer, &plane);
+ if (ret)
+ return ret;
+
+ vb = q->bufs[buffer];
+
+ /*
+ * MMAP requires page_aligned buffers.
+ * The buffer length was page_aligned at __vb2_buf_mem_alloc(),
+ * so, we need to do the same here.
+ */
+ length = PAGE_ALIGN(call_u32_bufop(q, get_plane_length, vb, plane));
+ if (length < (vma->vm_end - vma->vm_start)) {
+ VB2_DEBUG(1,
+ "MMAP invalid, as it would overflow buffer length\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&q->mmap_lock);
+ ret = call_memop(vb, mmap, vb->planes[plane].mem_priv, vma);
+ mutex_unlock(&q->mmap_lock);
+ if (ret)
+ return ret;
+
+ VB2_DEBUG(3, "buffer %d, plane %d successfully mapped\n", buffer, plane);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(vb2_mmap);
+
+#ifndef CONFIG_MMU
+unsigned long vb2_get_unmapped_area(struct vb2_queue *q,
+ unsigned long addr,
+ unsigned long len,
+ unsigned long pgoff,
+ unsigned long flags)
+{
+ unsigned long off = pgoff << PAGE_SHIFT;
+ struct vb2_buffer *vb;
+ unsigned int buffer, plane;
+ void *vaddr;
+ int ret;
+
+ if (q->memory != V4L2_MEMORY_MMAP) {
+ VB2_DEBUG(1, "queue is not currently set up for mmap\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Find the plane corresponding to the offset passed by userspace.
+ */
+ ret = __find_plane_by_offset(q, off, &buffer, &plane);
+ if (ret)
+ return ret;
+
+ vb = q->bufs[buffer];
+
+ vaddr = vb2_plane_vaddr(vb, plane);
+ return vaddr ? (unsigned long)vaddr : -EINVAL;
+}
+EXPORT_SYMBOL_GPL(vb2_get_unmapped_area);
+#endif
+
+/**
+ * vb2_core_queue_init() - initialize a videobuf2 queue
+ * @q: videobuf2 queue; this structure should be allocated in driver
+ *
+ * The vb2_queue structure should be allocated by the driver. The driver is
+ * responsible of clearing it's content and setting initial values for some
+ * required entries before calling this function.
+ * q->ops, q->mem_ops, q->type and q->io_modes are mandatory. Please refer
+ * to the struct vb2_queue description in include/media/videobuf2-v4l2.h
+ * for more information.
+ */
+int vb2_core_queue_init(struct vb2_queue *q)
+{
+ /*
+ * Sanity check
+ */
+ if (WARN_ON(!q) ||
+ WARN_ON(!q->ops) ||
+ WARN_ON(!q->mem_ops) ||
+ WARN_ON(!q->type) ||
+ WARN_ON(!q->io_modes) ||
+ WARN_ON(!q->ops->queue_setup) ||
+ WARN_ON(!q->ops->buf_queue))
+ return -EINVAL;
+
+ INIT_LIST_HEAD(&q->queued_list);
+ INIT_LIST_HEAD(&q->done_list);
+ spin_lock_init(&q->done_lock);
+ mutex_init(&q->mmap_lock);
+ init_waitqueue_head(&q->done_wq);
+
+ return 0;
+}
+
+/**
+ * vb2_core_queue_release() - stop streaming, release the queue and free memory
+ * @q: videobuf2 queue
+ *
+ * This function stops streaming and performs necessary clean ups, including
+ * freeing video buffer memory. The driver is responsible for freeing
+ * the vb2_queue structure itself.
+ */
+void vb2_core_queue_release(struct vb2_queue *q)
+{
+ __vb2_queue_cancel(q);
+ mutex_lock(&q->mmap_lock);
+ __vb2_queue_free(q, q->num_buffers);
+ mutex_unlock(&q->mmap_lock);
+}
+
+MODULE_DESCRIPTION("Driver helper framework for Video for Linux 2");
+MODULE_AUTHOR("Pawel Osciak <pawel@xxxxxxxxxx>, Marek Szyprowski");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 437b769..94c1e64 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -17,7 +17,7 @@
#include <linux/slab.h>
#include <linux/dma-mapping.h>
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
#include <media/videobuf2-dma-contig.h>
#include <media/videobuf2-memops.h>
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index eb90188..7289b81 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -17,7 +17,7 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
#include <media/videobuf2-memops.h>
#include <media/videobuf2-dma-sg.h>
diff --git a/drivers/media/v4l2-core/videobuf2-memops.c b/drivers/media/v4l2-core/videobuf2-memops.c
index e5da47a..81c1ad8 100644
--- a/drivers/media/v4l2-core/videobuf2-memops.c
+++ b/drivers/media/v4l2-core/videobuf2-memops.c
@@ -19,7 +19,7 @@
#include <linux/sched.h>
#include <linux/file.h>
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
#include <media/videobuf2-memops.h>
/**
diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c
index 7956776..85527e9 100644
--- a/drivers/media/v4l2-core/videobuf2-v4l2.c
+++ b/drivers/media/v4l2-core/videobuf2-v4l2.c
@@ -32,148 +32,6 @@
#include <trace/events/v4l2.h>
-static int debug;
-module_param(debug, int, 0644);
-
-#define dprintk(level, fmt, arg...) \
- do { \
- if (debug >= level) \
- pr_info("vb2: %s: " fmt, __func__, ## arg); \
- } while (0)
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-
-/*
- * If advanced debugging is on, then count how often each op is called
- * successfully, which can either be per-buffer or per-queue.
- *
- * This makes it easy to check that the 'init' and 'cleanup'
- * (and variations thereof) stay balanced.
- */
-
-#define log_memop(vb, op) \
- dprintk(2, "call_memop(%p, %d, %s)%s\n", \
- (vb)->vb2_queue, vb2_v4l2_index(vb), #op, \
- (vb)->vb2_queue->mem_ops->op ? "" : " (nop)")
-
-#define call_memop(vb, op, args...) \
-({ \
- struct vb2_queue *_q = (vb)->vb2_queue; \
- int err; \
- \
- log_memop(vb, op); \
- err = _q->mem_ops->op ? _q->mem_ops->op(args) : 0; \
- if (!err) \
- (vb)->cnt_mem_ ## op++; \
- err; \
-})
-
-#define call_ptr_memop(vb, op, args...) \
-({ \
- struct vb2_queue *_q = (vb)->vb2_queue; \
- void *ptr; \
- \
- log_memop(vb, op); \
- ptr = _q->mem_ops->op ? _q->mem_ops->op(args) : NULL; \
- if (!IS_ERR_OR_NULL(ptr)) \
- (vb)->cnt_mem_ ## op++; \
- ptr; \
-})
-
-#define call_void_memop(vb, op, args...) \
-({ \
- struct vb2_queue *_q = (vb)->vb2_queue; \
- \
- log_memop(vb, op); \
- if (_q->mem_ops->op) \
- _q->mem_ops->op(args); \
- (vb)->cnt_mem_ ## op++; \
-})
-
-#define log_qop(q, op) \
- dprintk(2, "call_qop(%p, %s)%s\n", q, #op, \
- (q)->ops->op ? "" : " (nop)")
-
-#define call_qop(q, op, args...) \
-({ \
- int err; \
- \
- log_qop(q, op); \
- err = (q)->ops->op ? (q)->ops->op(args) : 0; \
- if (!err) \
- (q)->cnt_ ## op++; \
- err; \
-})
-
-#define call_void_qop(q, op, args...) \
-({ \
- log_qop(q, op); \
- if ((q)->ops->op) \
- (q)->ops->op(args); \
- (q)->cnt_ ## op++; \
-})
-
-#define log_vb_qop(vb, op, args...) \
- dprintk(2, "call_vb_qop(%p, %d, %s)%s\n", \
- (vb)->vb2_queue, vb2_v4l2_index(vb), #op, \
- (vb)->vb2_queue->ops->op ? "" : " (nop)")
-
-#define call_vb_qop(vb, op, args...) \
-({ \
- int err; \
- \
- log_vb_qop(vb, op); \
- err = (vb)->vb2_queue->ops->op ? \
- (vb)->vb2_queue->ops->op(args) : 0; \
- if (!err) \
- (vb)->cnt_ ## op++; \
- err; \
-})
-
-#define call_void_vb_qop(vb, op, args...) \
-({ \
- log_vb_qop(vb, op); \
- if ((vb)->vb2_queue->ops->op) \
- (vb)->vb2_queue->ops->op(args); \
- (vb)->cnt_ ## op++; \
-})
-
-#else
-
-#define call_memop(vb, op, args...) \
- ((vb)->vb2_queue->mem_ops->op ? \
- (vb)->vb2_queue->mem_ops->op(args) : 0)
-
-#define call_ptr_memop(vb, op, args...) \
- ((vb)->vb2_queue->mem_ops->op ? \
- (vb)->vb2_queue->mem_ops->op(args) : NULL)
-
-#define call_void_memop(vb, op, args...) \
- do { \
- if ((vb)->vb2_queue->mem_ops->op) \
- (vb)->vb2_queue->mem_ops->op(args); \
- } while (0)
-
-#define call_qop(q, op, args...) \
- ((q)->ops->op ? (q)->ops->op(args) : 0)
-
-#define call_void_qop(q, op, args...) \
- do { \
- if ((q)->ops->op) \
- (q)->ops->op(args); \
- } while (0)
-
-#define call_vb_qop(vb, op, args...) \
- ((vb)->vb2_queue->ops->op ? (vb)->vb2_queue->ops->op(args) : 0)
-
-#define call_void_vb_qop(vb, op, args...) \
- do { \
- if ((vb)->vb2_queue->ops->op) \
- (vb)->vb2_queue->ops->op(args); \
- } while (0)
-
-#endif
-
/* Flags that are set by the vb2 core */
#define V4L2_BUFFER_MASK_FLAGS (V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_QUEUED | \
V4L2_BUF_FLAG_DONE | V4L2_BUF_FLAG_ERROR | \
@@ -183,399 +41,82 @@ module_param(debug, int, 0644);
#define V4L2_BUFFER_OUT_FLAGS (V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_BFRAME | \
V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_TIMECODE)
-static void __vb2_queue_cancel(struct vb2_queue *q);
-static void __enqueue_in_driver(struct vb2_buffer *vb);
-
-/**
- * __vb2_buf_mem_alloc() - allocate video memory for the given buffer
- */
-static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
+static int v4l2_init_buffer(struct vb2_buffer *vb,
+ unsigned int memory, unsigned int type, unsigned int index,
+ unsigned int planes)
{
- struct vb2_queue *q = vb->vb2_queue;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- enum dma_data_direction dma_dir =
- V4L2_TYPE_IS_OUTPUT(q->type) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
- void *mem_priv;
- int plane;
-
- /*
- * Allocate memory for all planes in this buffer
- * NOTE: mmapped areas should be page aligned
- */
- for (plane = 0; plane < vb->num_planes; ++plane) {
- unsigned long size = PAGE_ALIGN(q->plane_sizes[plane]);
- mem_priv = call_ptr_memop(vb, alloc, q->alloc_ctx[plane],
- size, dma_dir, q->gfp_flags);
- if (IS_ERR_OR_NULL(mem_priv))
- goto free;
+ /* Length stores number of planes for multiplanar buffers */
+ if (V4L2_TYPE_IS_MULTIPLANAR(type))
+ vbuf->v4l2_buf.length = planes;
- /* Associate allocator private data with this plane */
- vb->planes[plane].mem_priv = mem_priv;
- vbuf->v4l2_planes[plane].length = q->plane_sizes[plane];
- }
+ vbuf->v4l2_buf.index = index;
+ vbuf->v4l2_buf.type = type;
+ vbuf->v4l2_buf.memory = memory;
return 0;
-free:
- /* Free already allocated memory if one of the allocations failed */
- for (; plane > 0; --plane) {
- call_void_memop(vb, put, vb->planes[plane - 1].mem_priv);
- vb->planes[plane - 1].mem_priv = NULL;
- }
-
- return -ENOMEM;
-}
-
-/**
- * __vb2_buf_mem_free() - free memory of the given buffer
- */
-static void __vb2_buf_mem_free(struct vb2_buffer *vb)
-{
- unsigned int plane;
-
- for (plane = 0; plane < vb->num_planes; ++plane) {
- call_void_memop(vb, put, vb->planes[plane].mem_priv);
- vb->planes[plane].mem_priv = NULL;
- dprintk(3, "freed plane %d of buffer %d\n", plane,
- vb2_v4l2_index(vb));
- }
-}
-
-/**
- * __vb2_buf_userptr_put() - release userspace memory associated with
- * a USERPTR buffer
- */
-static void __vb2_buf_userptr_put(struct vb2_buffer *vb)
-{
- unsigned int plane;
-
- for (plane = 0; plane < vb->num_planes; ++plane) {
- if (vb->planes[plane].mem_priv)
- call_void_memop(vb, put_userptr, vb->planes[plane].mem_priv);
- vb->planes[plane].mem_priv = NULL;
- }
-}
-
-/**
- * __vb2_plane_dmabuf_put() - release memory associated with
- * a DMABUF shared plane
- */
-static void __vb2_plane_dmabuf_put(struct vb2_buffer *vb, struct vb2_plane *p)
-{
- if (!p->mem_priv)
- return;
-
- if (p->dbuf_mapped)
- call_void_memop(vb, unmap_dmabuf, p->mem_priv);
-
- call_void_memop(vb, detach_dmabuf, p->mem_priv);
- dma_buf_put(p->dbuf);
- memset(p, 0, sizeof(*p));
}
-/**
- * __vb2_buf_dmabuf_put() - release memory associated with
- * a DMABUF shared buffer
- */
-static void __vb2_buf_dmabuf_put(struct vb2_buffer *vb)
+static unsigned int v4l2_get_index(struct vb2_buffer *vb)
{
- unsigned int plane;
-
- for (plane = 0; plane < vb->num_planes; ++plane)
- __vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
-}
-
-/**
- * __setup_lengths() - setup initial lengths for every plane in
- * every buffer on the queue
- */
-static void __setup_lengths(struct vb2_queue *q, unsigned int n)
-{
- unsigned int buffer, plane;
- struct vb2_buffer *vb;
- struct vb2_v4l2_buffer *vbuf;
-
- for (buffer = q->num_buffers; buffer < q->num_buffers + n; ++buffer) {
- vb = q->bufs[buffer];
- if (!vb)
- continue;
- vbuf = to_vb2_v4l2_buffer(vb);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- for (plane = 0; plane < vb->num_planes; ++plane)
- vbuf->v4l2_planes[plane].length = q->plane_sizes[plane];
- }
+ return (vbuf->v4l2_buf.index);
}
-/**
- * __setup_offsets() - setup unique offsets ("cookies") for every plane in
- * every buffer on the queue
- */
-static void __setup_offsets(struct vb2_queue *q, unsigned int n)
+static int v4l2_set_plane_length(struct vb2_buffer *vb, int plane,
+ unsigned int length)
{
- unsigned int buffer, plane;
- struct vb2_buffer *vb;
- struct vb2_v4l2_buffer *vbuf;
- unsigned long off;
-
- if (q->num_buffers) {
- struct v4l2_plane *p;
- vb = q->bufs[q->num_buffers - 1];
- vbuf = to_vb2_v4l2_buffer(vb);
- p = &vbuf->v4l2_planes[vb->num_planes - 1];
- off = PAGE_ALIGN(p->m.mem_offset + p->length);
- } else {
- off = 0;
- }
-
- for (buffer = q->num_buffers; buffer < q->num_buffers + n; ++buffer) {
- vb = q->bufs[buffer];
- if (!vb)
- continue;
- vbuf = to_vb2_v4l2_buffer(vb);
-
- for (plane = 0; plane < vb->num_planes; ++plane) {
- vbuf->v4l2_planes[plane].m.mem_offset = off;
-
- dprintk(3, "buffer %d, plane %d offset 0x%08lx\n",
- buffer, plane, off);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- off += vbuf->v4l2_planes[plane].length;
- off = PAGE_ALIGN(off);
- }
- }
+ vbuf->v4l2_planes[plane].length = length;
+ return 0;
}
-/**
- * __vb2_queue_alloc() - allocate videobuf buffer structures and (for MMAP type)
- * video buffer memory for all buffers/planes on the queue and initializes the
- * queue
- *
- * Returns the number of buffers successfully allocated.
- */
-static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
- unsigned int num_buffers, unsigned int num_planes)
+static unsigned int v4l2_get_plane_length(struct vb2_buffer *vb, int plane)
{
- unsigned int buffer;
- struct vb2_buffer *vb;
- struct vb2_v4l2_buffer *vbuf;
- int ret;
-
- for (buffer = 0; buffer < num_buffers; ++buffer) {
- /* Allocate videobuf buffer structures */
- vb = kzalloc(q->buf_struct_size, GFP_KERNEL);
- if (!vb) {
- dprintk(1, "memory alloc for buffer struct failed\n");
- break;
- }
-
- vbuf = to_vb2_v4l2_buffer(vb);
-
- /* Length stores number of planes for multiplanar buffers */
- if (V4L2_TYPE_IS_MULTIPLANAR(q->type))
- vbuf->v4l2_buf.length = num_planes;
-
- vb->state = VB2_BUF_STATE_DEQUEUED;
- vb->vb2_queue = q;
- vb->num_planes = num_planes;
- vbuf->v4l2_buf.index = q->num_buffers + buffer;
- vbuf->v4l2_buf.type = q->type;
- vbuf->v4l2_buf.memory = memory;
-
- /* Allocate video buffer memory for the MMAP type */
- if (memory == V4L2_MEMORY_MMAP) {
- ret = __vb2_buf_mem_alloc(vb);
- if (ret) {
- dprintk(1, "failed allocating memory for "
- "buffer %d\n", buffer);
- kfree(vb);
- break;
- }
- /*
- * Call the driver-provided buffer initialization
- * callback, if given. An error in initialization
- * results in queue setup failure.
- */
- ret = call_vb_qop(vb, buf_init, vb);
- if (ret) {
- dprintk(1, "buffer %d %p initialization"
- " failed\n", buffer, vb);
- __vb2_buf_mem_free(vb);
- kfree(vb);
- break;
- }
- }
-
- q->bufs[q->num_buffers + buffer] = vb;
- }
-
- __setup_lengths(q, buffer);
- if (memory == V4L2_MEMORY_MMAP)
- __setup_offsets(q, buffer);
-
- dprintk(1, "allocated %d buffers, %d plane(s) each\n",
- buffer, num_planes);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- return buffer;
+ return (vbuf->v4l2_planes[plane].length);
}
-/**
- * __vb2_free_mem() - release all video buffer memory for a given queue
- */
-static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
+static int v4l2_set_plane_offset(struct vb2_buffer *vb, int plane,
+ unsigned int offset)
{
- unsigned int buffer;
- struct vb2_buffer *vb;
-
- for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
- ++buffer) {
- vb = q->bufs[buffer];
- if (!vb)
- continue;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- /* Free MMAP buffers or release USERPTR buffers */
- if (q->memory == V4L2_MEMORY_MMAP)
- __vb2_buf_mem_free(vb);
- else if (q->memory == V4L2_MEMORY_DMABUF)
- __vb2_buf_dmabuf_put(vb);
- else
- __vb2_buf_userptr_put(vb);
- }
+ vbuf->v4l2_planes[plane].m.mem_offset = offset;
+ return 0;
}
-/**
- * __vb2_queue_free() - free buffers at the end of the queue - video memory and
- * related information, if no buffers are left return the queue to an
- * uninitialized state. Might be called even if the queue has already been freed.
- */
-static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
+static unsigned int v4l2_get_plane_offset(struct vb2_buffer *vb, int plane)
{
- unsigned int buffer;
-
- /*
- * Sanity check: when preparing a buffer the queue lock is released for
- * a short while (see __buf_prepare for the details), which would allow
- * a race with a reqbufs which can call this function. Removing the
- * buffers from underneath __buf_prepare is obviously a bad idea, so we
- * check if any of the buffers is in the state PREPARING, and if so we
- * just return -EAGAIN.
- */
- for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
- ++buffer) {
- if (q->bufs[buffer] == NULL)
- continue;
- if (q->bufs[buffer]->state == VB2_BUF_STATE_PREPARING) {
- dprintk(1, "preparing buffers, cannot free\n");
- return -EAGAIN;
- }
- }
-
- /* Call driver-provided cleanup function for each buffer, if provided */
- for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
- ++buffer) {
- struct vb2_buffer *vb = q->bufs[buffer];
-
- if (vb && vb->planes[0].mem_priv)
- call_void_vb_qop(vb, buf_cleanup, vb);
- }
-
- /* Release video buffer memory */
- __vb2_free_mem(q, buffers);
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- /*
- * Check that all the calls were balances during the life-time of this
- * queue. If not (or if the debug level is 1 or up), then dump the
- * counters to the kernel log.
- */
- if (q->num_buffers) {
- bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming ||
- q->cnt_wait_prepare != q->cnt_wait_finish;
-
- if (unbalanced || debug) {
- pr_info("vb2: counters for queue %p:%s\n", q,
- unbalanced ? " UNBALANCED!" : "");
- pr_info("vb2: setup: %u start_streaming: %u stop_streaming: %u\n",
- q->cnt_queue_setup, q->cnt_start_streaming,
- q->cnt_stop_streaming);
- pr_info("vb2: wait_prepare: %u wait_finish: %u\n",
- q->cnt_wait_prepare, q->cnt_wait_finish);
- }
- q->cnt_queue_setup = 0;
- q->cnt_wait_prepare = 0;
- q->cnt_wait_finish = 0;
- q->cnt_start_streaming = 0;
- q->cnt_stop_streaming = 0;
- }
- for (buffer = 0; buffer < q->num_buffers; ++buffer) {
- struct vb2_buffer *vb = q->bufs[buffer];
- bool unbalanced = vb->cnt_mem_alloc != vb->cnt_mem_put ||
- vb->cnt_mem_prepare != vb->cnt_mem_finish ||
- vb->cnt_mem_get_userptr != vb->cnt_mem_put_userptr ||
- vb->cnt_mem_attach_dmabuf != vb->cnt_mem_detach_dmabuf ||
- vb->cnt_mem_map_dmabuf != vb->cnt_mem_unmap_dmabuf ||
- vb->cnt_buf_queue != vb->cnt_buf_done ||
- vb->cnt_buf_prepare != vb->cnt_buf_finish ||
- vb->cnt_buf_init != vb->cnt_buf_cleanup;
-
- if (unbalanced || debug) {
- pr_info("vb2: counters for queue %p, buffer %d:%s\n",
- q, buffer, unbalanced ? " UNBALANCED!" : "");
- pr_info("vb2: buf_init: %u buf_cleanup: %u buf_prepare: %u buf_finish: %u\n",
- vb->cnt_buf_init, vb->cnt_buf_cleanup,
- vb->cnt_buf_prepare, vb->cnt_buf_finish);
- pr_info("vb2: buf_queue: %u buf_done: %u\n",
- vb->cnt_buf_queue, vb->cnt_buf_done);
- pr_info("vb2: alloc: %u put: %u prepare: %u finish: %u mmap: %u\n",
- vb->cnt_mem_alloc, vb->cnt_mem_put,
- vb->cnt_mem_prepare, vb->cnt_mem_finish,
- vb->cnt_mem_mmap);
- pr_info("vb2: get_userptr: %u put_userptr: %u\n",
- vb->cnt_mem_get_userptr, vb->cnt_mem_put_userptr);
- pr_info("vb2: attach_dmabuf: %u detach_dmabuf: %u map_dmabuf: %u unmap_dmabuf: %u\n",
- vb->cnt_mem_attach_dmabuf, vb->cnt_mem_detach_dmabuf,
- vb->cnt_mem_map_dmabuf, vb->cnt_mem_unmap_dmabuf);
- pr_info("vb2: get_dmabuf: %u num_users: %u vaddr: %u cookie: %u\n",
- vb->cnt_mem_get_dmabuf,
- vb->cnt_mem_num_users,
- vb->cnt_mem_vaddr,
- vb->cnt_mem_cookie);
- }
- }
-#endif
-
- /* Free videobuf buffers */
- for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
- ++buffer) {
- kfree(q->bufs[buffer]);
- q->bufs[buffer] = NULL;
- }
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- q->num_buffers -= buffers;
- if (!q->num_buffers) {
- q->memory = 0;
- INIT_LIST_HEAD(&q->queued_list);
- }
- return 0;
+ return (vbuf->v4l2_planes[plane].m.mem_offset);
}
/**
- * __verify_planes_array() - verify that the planes array passed in struct
+ * v4l2_verify_planes() - verify that the planes array passed in struct
* v4l2_buffer from userspace can be safely used
*/
-static int __verify_planes_array(struct vb2_buffer *vb, const struct v4l2_buffer *b)
+static int v4l2_verify_planes(struct vb2_buffer *vb, void *pb)
{
+ struct v4l2_buffer *b = (struct v4l2_buffer *)pb;
+
if (!V4L2_TYPE_IS_MULTIPLANAR(b->type))
return 0;
/* Is memory for copying plane information present? */
if (NULL == b->m.planes) {
- dprintk(1, "multi-planar buffer passed but "
+ VB2_DEBUG(1, "multi-planar buffer passed but "
"planes array not provided\n");
return -EINVAL;
}
if (b->length < vb->num_planes || b->length > VIDEO_MAX_PLANES) {
- dprintk(1, "incorrect planes array length, "
+ VB2_DEBUG(1, "incorrect planes array length, "
"expected %d, got %d\n", vb->num_planes, b->length);
return -EINVAL;
}
@@ -584,88 +125,12 @@ static int __verify_planes_array(struct vb2_buffer *vb, const struct v4l2_buffer
}
/**
- * __verify_length() - Verify that the bytesused value for each plane fits in
- * the plane length and that the data offset doesn't exceed the bytesused value.
- */
-static int __verify_length(struct vb2_buffer *vb, const struct v4l2_buffer *b)
-{
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- unsigned int length;
- unsigned int bytesused;
- unsigned int plane;
-
- if (!V4L2_TYPE_IS_OUTPUT(b->type))
- return 0;
-
- if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) {
- for (plane = 0; plane < vb->num_planes; ++plane) {
- length = (b->memory == V4L2_MEMORY_USERPTR ||
- b->memory == V4L2_MEMORY_DMABUF)
- ? b->m.planes[plane].length
- : vbuf->v4l2_planes[plane].length;
- bytesused = b->m.planes[plane].bytesused
- ? b->m.planes[plane].bytesused : length;
-
- if (b->m.planes[plane].bytesused > length)
- return -EINVAL;
-
- if (b->m.planes[plane].data_offset > 0 &&
- b->m.planes[plane].data_offset >= bytesused)
- return -EINVAL;
- }
- } else {
- length = (b->memory == V4L2_MEMORY_USERPTR)
- ? b->length : vbuf->v4l2_planes[0].length;
- bytesused = b->bytesused ? b->bytesused : length;
-
- if (b->bytesused > length)
- return -EINVAL;
- }
-
- return 0;
-}
-
-/**
- * __buffer_in_use() - return true if the buffer is in use and
- * the queue cannot be freed (by the means of REQBUFS(0)) call
- */
-static bool __buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb)
-{
- unsigned int plane;
- for (plane = 0; plane < vb->num_planes; ++plane) {
- void *mem_priv = vb->planes[plane].mem_priv;
- /*
- * If num_users() has not been provided, call_memop
- * will return 0, apparently nobody cares about this
- * case anyway. If num_users() returns more than 1,
- * we are not the only user of the plane's memory.
- */
- if (mem_priv && call_memop(vb, num_users, mem_priv) > 1)
- return true;
- }
- return false;
-}
-
-/**
- * __buffers_in_use() - return true if any buffers on the queue are in use and
- * the queue cannot be freed (by the means of REQBUFS(0)) call
- */
-static bool __buffers_in_use(struct vb2_queue *q)
-{
- unsigned int buffer;
- for (buffer = 0; buffer < q->num_buffers; ++buffer) {
- if (__buffer_in_use(q, q->bufs[buffer]))
- return true;
- }
- return false;
-}
-
-/**
- * __fill_v4l2_buffer() - fill in a struct v4l2_buffer with information to be
+ * v4l2_fill_buffer() - fill in a struct v4l2_buffer with information to be
* returned to userspace
*/
-static void __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b)
+static int v4l2_fill_buffer(struct vb2_buffer *vb, void *pb)
{
+ struct v4l2_buffer *b = (struct v4l2_buffer *)pb;
struct vb2_queue *q = vb->vb2_queue;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
@@ -734,530 +199,11 @@ static void __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b)
if (__buffer_in_use(q, vb))
b->flags |= V4L2_BUF_FLAG_MAPPED;
-}
-
-/**
- * vb2_querybuf() - query video buffer information
- * @q: videobuf queue
- * @b: buffer struct passed from userspace to vidioc_querybuf handler
- * in driver
- *
- * Should be called from vidioc_querybuf ioctl handler in driver.
- * This function will verify the passed v4l2_buffer structure and fill the
- * relevant information for the userspace.
- *
- * The return values from this function are intended to be directly returned
- * from vidioc_querybuf handler in driver.
- */
-int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b)
-{
- struct vb2_buffer *vb;
- int ret;
-
- if (b->type != q->type) {
- dprintk(1, "wrong buffer type\n");
- return -EINVAL;
- }
-
- if (b->index >= q->num_buffers) {
- dprintk(1, "buffer index out of range\n");
- return -EINVAL;
- }
- vb = q->bufs[b->index];
- ret = __verify_planes_array(vb, b);
- if (!ret)
- __fill_v4l2_buffer(vb, b);
- return ret;
-}
-EXPORT_SYMBOL(vb2_querybuf);
-
-/**
- * __verify_userptr_ops() - verify that all memory operations required for
- * USERPTR queue type have been provided
- */
-static int __verify_userptr_ops(struct vb2_queue *q)
-{
- if (!(q->io_modes & VB2_USERPTR) || !q->mem_ops->get_userptr ||
- !q->mem_ops->put_userptr)
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * __verify_mmap_ops() - verify that all memory operations required for
- * MMAP queue type have been provided
- */
-static int __verify_mmap_ops(struct vb2_queue *q)
-{
- if (!(q->io_modes & VB2_MMAP) || !q->mem_ops->alloc ||
- !q->mem_ops->put || !q->mem_ops->mmap)
- return -EINVAL;
return 0;
}
-/**
- * __verify_dmabuf_ops() - verify that all memory operations required for
- * DMABUF queue type have been provided
- */
-static int __verify_dmabuf_ops(struct vb2_queue *q)
-{
- if (!(q->io_modes & VB2_DMABUF) || !q->mem_ops->attach_dmabuf ||
- !q->mem_ops->detach_dmabuf || !q->mem_ops->map_dmabuf ||
- !q->mem_ops->unmap_dmabuf)
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * __verify_memory_type() - Check whether the memory type and buffer type
- * passed to a buffer operation are compatible with the queue.
- */
-static int __verify_memory_type(struct vb2_queue *q,
- enum v4l2_memory memory, enum v4l2_buf_type type)
-{
- if (memory != V4L2_MEMORY_MMAP && memory != V4L2_MEMORY_USERPTR &&
- memory != V4L2_MEMORY_DMABUF) {
- dprintk(1, "unsupported memory type\n");
- return -EINVAL;
- }
-
- if (type != q->type) {
- dprintk(1, "requested type is incorrect\n");
- return -EINVAL;
- }
-
- /*
- * Make sure all the required memory ops for given memory type
- * are available.
- */
- if (memory == V4L2_MEMORY_MMAP && __verify_mmap_ops(q)) {
- dprintk(1, "MMAP for current setup unsupported\n");
- return -EINVAL;
- }
-
- if (memory == V4L2_MEMORY_USERPTR && __verify_userptr_ops(q)) {
- dprintk(1, "USERPTR for current setup unsupported\n");
- return -EINVAL;
- }
-
- if (memory == V4L2_MEMORY_DMABUF && __verify_dmabuf_ops(q)) {
- dprintk(1, "DMABUF for current setup unsupported\n");
- return -EINVAL;
- }
-
- /*
- * Place the busy tests at the end: -EBUSY can be ignored when
- * create_bufs is called with count == 0, but count == 0 should still
- * do the memory and type validation.
- */
- if (vb2_fileio_is_active(q)) {
- dprintk(1, "file io in progress\n");
- return -EBUSY;
- }
- return 0;
-}
-
-/**
- * __reqbufs() - Initiate streaming
- * @q: videobuf2 queue
- * @req: struct passed from userspace to vidioc_reqbufs handler in driver
- *
- * Should be called from vidioc_reqbufs ioctl handler of a driver.
- * This function:
- * 1) verifies streaming parameters passed from the userspace,
- * 2) sets up the queue,
- * 3) negotiates number of buffers and planes per buffer with the driver
- * to be used during streaming,
- * 4) allocates internal buffer structures (struct vb2_buffer), according to
- * the agreed parameters,
- * 5) for MMAP memory type, allocates actual video memory, using the
- * memory handling/allocation routines provided during queue initialization
- *
- * If req->count is 0, all the memory will be freed instead.
- * If the queue has been allocated previously (by a previous vb2_reqbufs) call
- * and the queue is not busy, memory will be reallocated.
- *
- * The return values from this function are intended to be directly returned
- * from vidioc_reqbufs handler in driver.
- */
-static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
-{
- unsigned int num_buffers, allocated_buffers, num_planes = 0;
- int ret;
-
- if (q->streaming) {
- dprintk(1, "streaming active\n");
- return -EBUSY;
- }
-
- if (req->count == 0 || q->num_buffers != 0 || q->memory != req->memory) {
- /*
- * We already have buffers allocated, so first check if they
- * are not in use and can be freed.
- */
- mutex_lock(&q->mmap_lock);
- if (q->memory == V4L2_MEMORY_MMAP && __buffers_in_use(q)) {
- mutex_unlock(&q->mmap_lock);
- dprintk(1, "memory in use, cannot free\n");
- return -EBUSY;
- }
-
- /*
- * Call queue_cancel to clean up any buffers in the PREPARED or
- * QUEUED state which is possible if buffers were prepared or
- * queued without ever calling STREAMON.
- */
- __vb2_queue_cancel(q);
- ret = __vb2_queue_free(q, q->num_buffers);
- mutex_unlock(&q->mmap_lock);
- if (ret)
- return ret;
-
- /*
- * In case of REQBUFS(0) return immediately without calling
- * driver's queue_setup() callback and allocating resources.
- */
- if (req->count == 0)
- return 0;
- }
-
- /*
- * Make sure the requested values and current defaults are sane.
- */
- num_buffers = min_t(unsigned int, req->count, VIDEO_MAX_FRAME);
- num_buffers = max_t(unsigned int, num_buffers, q->min_buffers_needed);
- memset(q->plane_sizes, 0, sizeof(q->plane_sizes));
- memset(q->alloc_ctx, 0, sizeof(q->alloc_ctx));
- q->memory = req->memory;
-
- /*
- * Ask the driver how many buffers and planes per buffer it requires.
- * Driver also sets the size and allocator context for each plane.
- */
- ret = call_qop(q, queue_setup, q, NULL, &num_buffers, &num_planes,
- q->plane_sizes, q->alloc_ctx);
- if (ret)
- return ret;
-
- /* Finally, allocate buffers and video memory */
- allocated_buffers = __vb2_queue_alloc(q, req->memory, num_buffers, num_planes);
- if (allocated_buffers == 0) {
- dprintk(1, "memory allocation failed\n");
- return -ENOMEM;
- }
-
- /*
- * There is no point in continuing if we can't allocate the minimum
- * number of buffers needed by this vb2_queue.
- */
- if (allocated_buffers < q->min_buffers_needed)
- ret = -ENOMEM;
-
- /*
- * Check if driver can handle the allocated number of buffers.
- */
- if (!ret && allocated_buffers < num_buffers) {
- num_buffers = allocated_buffers;
-
- ret = call_qop(q, queue_setup, q, NULL, &num_buffers,
- &num_planes, q->plane_sizes, q->alloc_ctx);
-
- if (!ret && allocated_buffers < num_buffers)
- ret = -ENOMEM;
-
- /*
- * Either the driver has accepted a smaller number of buffers,
- * or .queue_setup() returned an error
- */
- }
-
- mutex_lock(&q->mmap_lock);
- q->num_buffers = allocated_buffers;
-
- if (ret < 0) {
- /*
- * Note: __vb2_queue_free() will subtract 'allocated_buffers'
- * from q->num_buffers.
- */
- __vb2_queue_free(q, allocated_buffers);
- mutex_unlock(&q->mmap_lock);
- return ret;
- }
- mutex_unlock(&q->mmap_lock);
-
- /*
- * Return the number of successfully allocated buffers
- * to the userspace.
- */
- req->count = allocated_buffers;
- q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
-
- return 0;
-}
-
-/**
- * vb2_reqbufs() - Wrapper for __reqbufs() that also verifies the memory and
- * type values.
- * @q: videobuf2 queue
- * @req: struct passed from userspace to vidioc_reqbufs handler in driver
- */
-int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
-{
- int ret = __verify_memory_type(q, req->memory, req->type);
-
- return ret ? ret : __reqbufs(q, req);
-}
-EXPORT_SYMBOL_GPL(vb2_reqbufs);
-
-/**
- * __create_bufs() - Allocate buffers and any required auxiliary structs
- * @q: videobuf2 queue
- * @create: creation parameters, passed from userspace to vidioc_create_bufs
- * handler in driver
- *
- * Should be called from vidioc_create_bufs ioctl handler of a driver.
- * This function:
- * 1) verifies parameter sanity
- * 2) calls the .queue_setup() queue operation
- * 3) performs any necessary memory allocations
- *
- * The return values from this function are intended to be directly returned
- * from vidioc_create_bufs handler in driver.
- */
-static int __create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create)
-{
- unsigned int num_planes = 0, num_buffers, allocated_buffers;
- int ret;
-
- if (q->num_buffers == VIDEO_MAX_FRAME) {
- dprintk(1, "maximum number of buffers already allocated\n");
- return -ENOBUFS;
- }
-
- if (!q->num_buffers) {
- memset(q->plane_sizes, 0, sizeof(q->plane_sizes));
- memset(q->alloc_ctx, 0, sizeof(q->alloc_ctx));
- q->memory = create->memory;
- q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
- }
-
- num_buffers = min(create->count, VIDEO_MAX_FRAME - q->num_buffers);
-
- /*
- * Ask the driver, whether the requested number of buffers, planes per
- * buffer and their sizes are acceptable
- */
- ret = call_qop(q, queue_setup, q, &create->format, &num_buffers,
- &num_planes, q->plane_sizes, q->alloc_ctx);
- if (ret)
- return ret;
-
- /* Finally, allocate buffers and video memory */
- allocated_buffers = __vb2_queue_alloc(q, create->memory, num_buffers,
- num_planes);
- if (allocated_buffers == 0) {
- dprintk(1, "memory allocation failed\n");
- return -ENOMEM;
- }
-
- /*
- * Check if driver can handle the so far allocated number of buffers.
- */
- if (allocated_buffers < num_buffers) {
- num_buffers = allocated_buffers;
-
- /*
- * q->num_buffers contains the total number of buffers, that the
- * queue driver has set up
- */
- ret = call_qop(q, queue_setup, q, &create->format, &num_buffers,
- &num_planes, q->plane_sizes, q->alloc_ctx);
-
- if (!ret && allocated_buffers < num_buffers)
- ret = -ENOMEM;
-
- /*
- * Either the driver has accepted a smaller number of buffers,
- * or .queue_setup() returned an error
- */
- }
-
- mutex_lock(&q->mmap_lock);
- q->num_buffers += allocated_buffers;
-
- if (ret < 0) {
- /*
- * Note: __vb2_queue_free() will subtract 'allocated_buffers'
- * from q->num_buffers.
- */
- __vb2_queue_free(q, allocated_buffers);
- mutex_unlock(&q->mmap_lock);
- return -ENOMEM;
- }
- mutex_unlock(&q->mmap_lock);
-
- /*
- * Return the number of successfully allocated buffers
- * to the userspace.
- */
- create->count = allocated_buffers;
-
- return 0;
-}
-
-/**
- * vb2_create_bufs() - Wrapper for __create_bufs() that also verifies the
- * memory and type values.
- * @q: videobuf2 queue
- * @create: creation parameters, passed from userspace to vidioc_create_bufs
- * handler in driver
- */
-int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create)
-{
- int ret = __verify_memory_type(q, create->memory, create->format.type);
-
- create->index = q->num_buffers;
- if (create->count == 0)
- return ret != -EBUSY ? ret : 0;
- return ret ? ret : __create_bufs(q, create);
-}
-EXPORT_SYMBOL_GPL(vb2_create_bufs);
-
-/**
- * vb2_plane_vaddr() - Return a kernel virtual address of a given plane
- * @vb: vb2_buffer to which the plane in question belongs to
- * @plane_no: plane number for which the address is to be returned
- *
- * This function returns a kernel virtual address of a given plane if
- * such a mapping exist, NULL otherwise.
- */
-void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no)
-{
- if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)
- return NULL;
-
- return call_ptr_memop(vb, vaddr, vb->planes[plane_no].mem_priv);
-
-}
-EXPORT_SYMBOL_GPL(vb2_plane_vaddr);
-
-/**
- * vb2_plane_cookie() - Return allocator specific cookie for the given plane
- * @vb: vb2_buffer to which the plane in question belongs to
- * @plane_no: plane number for which the cookie is to be returned
- *
- * This function returns an allocator specific cookie for a given plane if
- * available, NULL otherwise. The allocator should provide some simple static
- * inline function, which would convert this cookie to the allocator specific
- * type that can be used directly by the driver to access the buffer. This can
- * be for example physical address, pointer to scatter list or IOMMU mapping.
- */
-void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no)
-{
- if (plane_no >= vb->num_planes || !vb->planes[plane_no].mem_priv)
- return NULL;
-
- return call_ptr_memop(vb, cookie, vb->planes[plane_no].mem_priv);
-}
-EXPORT_SYMBOL_GPL(vb2_plane_cookie);
-
-/**
- * vb2_buffer_done() - inform videobuf that an operation on a buffer is finished
- * @vb: vb2_buffer returned from the driver
- * @state: either VB2_BUF_STATE_DONE if the operation finished successfully,
- * VB2_BUF_STATE_ERROR if the operation finished with an error or
- * VB2_BUF_STATE_QUEUED if the driver wants to requeue buffers.
- * If start_streaming fails then it should return buffers with state
- * VB2_BUF_STATE_QUEUED to put them back into the queue.
- *
- * This function should be called by the driver after a hardware operation on
- * a buffer is finished and the buffer may be returned to userspace. The driver
- * cannot use this buffer anymore until it is queued back to it by videobuf
- * by the means of buf_queue callback. Only buffers previously queued to the
- * driver by buf_queue can be passed to this function.
- *
- * While streaming a buffer can only be returned in state DONE or ERROR.
- * The start_streaming op can also return them in case the DMA engine cannot
- * be started for some reason. In that case the buffers should be returned with
- * state QUEUED.
- */
-void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
-{
- struct vb2_queue *q = vb->vb2_queue;
- unsigned long flags;
- unsigned int plane;
-
- if (WARN_ON(vb->state != VB2_BUF_STATE_ACTIVE))
- return;
-
- if (WARN_ON(state != VB2_BUF_STATE_DONE &&
- state != VB2_BUF_STATE_ERROR &&
- state != VB2_BUF_STATE_QUEUED))
- state = VB2_BUF_STATE_ERROR;
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- /*
- * Although this is not a callback, it still does have to balance
- * with the buf_queue op. So update this counter manually.
- */
- vb->cnt_buf_done++;
-#endif
- dprintk(4, "done processing on buffer %d, state: %d\n",
- vb2_v4l2_index(vb), state);
-
- /* sync buffers */
- for (plane = 0; plane < vb->num_planes; ++plane)
- call_void_memop(vb, finish, vb->planes[plane].mem_priv);
-
- /* Add the buffer to the done buffers list */
- spin_lock_irqsave(&q->done_lock, flags);
- vb->state = state;
- if (state != VB2_BUF_STATE_QUEUED)
- list_add_tail(&vb->done_entry, &q->done_list);
- atomic_dec(&q->owned_by_drv_count);
- spin_unlock_irqrestore(&q->done_lock, flags);
-
- trace_vb2_buf_done(q, vb);
-
- if (state == VB2_BUF_STATE_QUEUED) {
- if (q->start_streaming_called)
- __enqueue_in_driver(vb);
- return;
- }
-
- /* Inform any processes that may be waiting for buffers */
- wake_up(&q->done_wq);
-}
-EXPORT_SYMBOL_GPL(vb2_buffer_done);
-
-/**
- * vb2_discard_done() - discard all buffers marked as DONE
- * @q: videobuf2 queue
- *
- * This function is intended to be used with suspend/resume operations. It
- * discards all 'done' buffers as they would be too old to be requested after
- * resume.
- *
- * Drivers must stop the hardware and synchronize with interrupt handlers and/or
- * delayed works before calling this function to make sure no buffer will be
- * touched by the driver and/or hardware.
- */
-void vb2_discard_done(struct vb2_queue *q)
-{
- struct vb2_buffer *vb;
- unsigned long flags;
-
- spin_lock_irqsave(&q->done_lock, flags);
- list_for_each_entry(vb, &q->done_list, done_entry)
- vb->state = VB2_BUF_STATE_ERROR;
- spin_unlock_irqrestore(&q->done_lock, flags);
-}
-EXPORT_SYMBOL_GPL(vb2_discard_done);
-
-static void vb2_warn_zero_bytesused(struct vb2_buffer *vb)
+static void __warn_zero_bytesused(struct vb2_buffer *vb)
{
static bool __check_once __read_mostly;
@@ -1275,15 +221,17 @@ static void vb2_warn_zero_bytesused(struct vb2_buffer *vb)
}
/**
- * __fill_vb2_buffer() - fill a vb2_buffer with information provided in a
+ * v4l2_fill_vb2_buffer() - fill a vb2_buffer with information provided in a
* v4l2_buffer by the userspace. The caller has already verified that struct
* v4l2_buffer has a valid number of planes.
*/
-static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b,
- struct v4l2_plane *v4l2_planes)
+static int v4l2_fill_vb2_buffer(struct vb2_buffer *vb,
+ const void *pb, void *planes)
{
- unsigned int plane;
+ struct v4l2_buffer *b = (struct v4l2_buffer *)pb;
+ struct v4l2_plane *v4l2_planes = (struct v4l2_plane *)planes;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ unsigned int plane;
if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) {
if (b->memory == V4L2_MEMORY_USERPTR) {
@@ -1326,7 +274,7 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
struct v4l2_plane *psrc = &b->m.planes[plane];
if (psrc->bytesused == 0)
- vb2_warn_zero_bytesused(vb);
+ __warn_zero_bytesused(vb);
if (vb->vb2_queue->allow_zero_bytesused)
pdst->bytesused = psrc->bytesused;
@@ -1363,7 +311,7 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
if (V4L2_TYPE_IS_OUTPUT(b->type)) {
if (b->bytesused == 0)
- vb2_warn_zero_bytesused(vb);
+ __warn_zero_bytesused(vb);
if (vb->vb2_queue->allow_zero_bytesused)
v4l2_planes[0].bytesused = b->bytesused;
@@ -1387,19 +335,64 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
vbuf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
}
- if (V4L2_TYPE_IS_OUTPUT(b->type)) {
- /*
- * For output buffers mask out the timecode flag:
- * this will be handled later in vb2_internal_qbuf().
- * The 'field' is valid metadata for this output buffer
- * and so that needs to be copied here.
- */
- vbuf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TIMECODE;
- vbuf->v4l2_buf.field = b->field;
+ if (V4L2_TYPE_IS_OUTPUT(b->type)) {
+ /*
+ * For output buffers mask out the timecode flag:
+ * this will be handled later in vb2_internal_qbuf().
+ * The 'field' is valid metadata for this output buffer
+ * and so that needs to be copied here.
+ */
+ vbuf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TIMECODE;
+ vbuf->v4l2_buf.field = b->field;
+ } else {
+ /* Zero any output buffer flags as this is a capture buffer */
+ vbuf->v4l2_buf.flags &= ~V4L2_BUFFER_OUT_FLAGS;
+ }
+
+ return 0;
+}
+
+/**
+ * __verify_length() - Verify that the bytesused value for each plane fits in
+ * the plane length and that the data offset doesn't exceed the bytesused value.
+ */
+static int __verify_length(struct vb2_buffer *vb, void *pb)
+{
+ struct v4l2_buffer *b = (struct v4l2_buffer *)pb;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ unsigned int length;
+ unsigned int bytesused;
+ unsigned int plane;
+
+ if (!V4L2_TYPE_IS_OUTPUT(b->type))
+ return 0;
+
+ if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) {
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ length = (b->memory == V4L2_MEMORY_USERPTR ||
+ b->memory == V4L2_MEMORY_DMABUF)
+ ? b->m.planes[plane].length
+ : vbuf->v4l2_planes[plane].length;
+ bytesused = b->m.planes[plane].bytesused
+ ? b->m.planes[plane].bytesused : length;
+
+ if (b->m.planes[plane].bytesused > length)
+ return -EINVAL;
+
+ if (b->m.planes[plane].data_offset > 0 &&
+ b->m.planes[plane].data_offset >= bytesused)
+ return -EINVAL;
+ }
} else {
- /* Zero any output buffer flags as this is a capture buffer */
- vbuf->v4l2_buf.flags &= ~V4L2_BUFFER_OUT_FLAGS;
+ length = (b->memory == V4L2_MEMORY_USERPTR)
+ ? b->length : vbuf->v4l2_planes[0].length;
+ bytesused = b->bytesused ? b->bytesused : length;
+
+ if (b->bytesused > length)
+ return -EINVAL;
}
+
+ return 0;
}
/**
@@ -1409,7 +402,7 @@ static int __qbuf_mmap(struct vb2_buffer *vb, const struct v4l2_buffer *b)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- __fill_vb2_buffer(vb, b, vbuf->v4l2_planes);
+ v4l2_fill_vb2_buffer(vb, b, vbuf->v4l2_planes);
return call_vb_qop(vb, buf_prepare, vb);
}
@@ -1430,7 +423,7 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
- __fill_vb2_buffer(vb, b, planes);
+ v4l2_fill_vb2_buffer(vb, b, planes);
for (plane = 0; plane < vb->num_planes; ++plane) {
/* Skip the plane if already verified */
@@ -1439,12 +432,12 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
&& vbuf->v4l2_planes[plane].length == planes[plane].length)
continue;
- dprintk(3, "userspace address for plane %d changed, "
+ VB2_DEBUG(3, "userspace address for plane %d changed, "
"reacquiring memory\n", plane);
/* Check if the provided plane buffer is large enough */
if (planes[plane].length < q->plane_sizes[plane]) {
- dprintk(1, "provided buffer size %u is less than "
+ VB2_DEBUG(1, "provided buffer size %u is less than "
"setup size %u for plane %d\n",
planes[plane].length,
q->plane_sizes[plane], plane);
@@ -1469,7 +462,7 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
planes[plane].m.userptr,
planes[plane].length, dma_dir);
if (IS_ERR_OR_NULL(mem_priv)) {
- dprintk(1, "failed acquiring userspace "
+ VB2_DEBUG(1, "failed acquiring userspace "
"memory for plane %d\n", plane);
ret = mem_priv ? PTR_ERR(mem_priv) : -EINVAL;
goto err;
@@ -1492,14 +485,14 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
*/
ret = call_vb_qop(vb, buf_init, vb);
if (ret) {
- dprintk(1, "buffer initialization failed\n");
+ VB2_DEBUG(1, "buffer initialization failed\n");
goto err;
}
}
ret = call_vb_qop(vb, buf_prepare, vb);
if (ret) {
- dprintk(1, "buffer preparation failed\n");
+ VB2_DEBUG(1, "buffer preparation failed\n");
call_void_vb_qop(vb, buf_cleanup, vb);
goto err;
}
@@ -1535,13 +528,13 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
- __fill_vb2_buffer(vb, b, planes);
+ v4l2_fill_vb2_buffer(vb, b, planes);
for (plane = 0; plane < vb->num_planes; ++plane) {
struct dma_buf *dbuf = dma_buf_get(planes[plane].m.fd);
if (IS_ERR_OR_NULL(dbuf)) {
- dprintk(1, "invalid dmabuf fd for plane %d\n",
+ VB2_DEBUG(1, "invalid dmabuf fd for plane %d\n",
plane);
ret = -EINVAL;
goto err;
@@ -1552,7 +545,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
planes[plane].length = dbuf->size;
if (planes[plane].length < q->plane_sizes[plane]) {
- dprintk(1, "invalid dmabuf length for plane %d\n",
+ VB2_DEBUG(1, "invalid dmabuf length for plane %d\n",
plane);
ret = -EINVAL;
goto err;
@@ -1565,7 +558,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
continue;
}
- dprintk(1, "buffer for plane %d changed\n", plane);
+ VB2_DEBUG(1, "buffer for plane %d changed\n", plane);
if (!reacquired) {
reacquired = true;
@@ -1580,7 +573,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
mem_priv = call_ptr_memop(vb, attach_dmabuf, q->alloc_ctx[plane],
dbuf, planes[plane].length, dma_dir);
if (IS_ERR(mem_priv)) {
- dprintk(1, "failed to attach dmabuf\n");
+ VB2_DEBUG(1, "failed to attach dmabuf\n");
ret = PTR_ERR(mem_priv);
dma_buf_put(dbuf);
goto err;
@@ -1597,7 +590,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
for (plane = 0; plane < vb->num_planes; ++plane) {
ret = call_memop(vb, map_dmabuf, vb->planes[plane].mem_priv);
if (ret) {
- dprintk(1, "failed to map dmabuf for plane %d\n",
+ VB2_DEBUG(1, "failed to map dmabuf for plane %d\n",
plane);
goto err;
}
@@ -1618,14 +611,14 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
*/
ret = call_vb_qop(vb, buf_init, vb);
if (ret) {
- dprintk(1, "buffer initialization failed\n");
+ VB2_DEBUG(1, "buffer initialization failed\n");
goto err;
}
}
ret = call_vb_qop(vb, buf_prepare, vb);
if (ret) {
- dprintk(1, "buffer preparation failed\n");
+ VB2_DEBUG(1, "buffer preparation failed\n");
call_void_vb_qop(vb, buf_cleanup, vb);
goto err;
}
@@ -1638,35 +631,16 @@ err:
return ret;
}
-/**
- * __enqueue_in_driver() - enqueue a vb2_buffer in driver for processing
- */
-static void __enqueue_in_driver(struct vb2_buffer *vb)
-{
- struct vb2_queue *q = vb->vb2_queue;
- unsigned int plane;
-
- vb->state = VB2_BUF_STATE_ACTIVE;
- atomic_inc(&q->owned_by_drv_count);
-
- trace_vb2_buf_queue(q, vb);
-
- /* sync buffers */
- for (plane = 0; plane < vb->num_planes; ++plane)
- call_void_memop(vb, prepare, vb->planes[plane].mem_priv);
-
- call_void_vb_qop(vb, buf_queue, vb);
-}
-
-static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
+static int v4l2_buf_prepare(struct vb2_buffer *vb, void *pb)
{
+ struct v4l2_buffer *b = (struct v4l2_buffer *)pb;
struct vb2_queue *q = vb->vb2_queue;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
int ret;
ret = __verify_length(vb, b);
if (ret < 0) {
- dprintk(1, "plane parameters verification failed: %d\n", ret);
+ VB2_DEBUG(1, "plane parameters verification failed: %d\n", ret);
return ret;
}
if (b->field == V4L2_FIELD_ALTERNATE && V4L2_TYPE_IS_OUTPUT(q->type)) {
@@ -1679,12 +653,12 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
* that just says that it is either a top or a bottom field,
* but not which of the two it is.
*/
- dprintk(1, "the field is incorrectly set to ALTERNATE for an output buffer\n");
+ VB2_DEBUG(1, "the field is incorrectly set to ALTERNATE for an output buffer\n");
return -EINVAL;
}
if (q->error) {
- dprintk(1, "fatal error occurred on queue\n");
+ VB2_DEBUG(1, "fatal error occurred on queue\n");
return -EIO;
}
@@ -1711,463 +685,149 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
}
if (ret)
- dprintk(1, "buffer preparation failed: %d\n", ret);
+ VB2_DEBUG(1, "buffer preparation failed: %d\n", ret);
vb->state = ret ? VB2_BUF_STATE_DEQUEUED : VB2_BUF_STATE_PREPARED;
return ret;
}
-static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b,
- const char *opname)
-{
- if (b->type != q->type) {
- dprintk(1, "%s: invalid buffer type\n", opname);
- return -EINVAL;
- }
-
- if (b->index >= q->num_buffers) {
- dprintk(1, "%s: buffer index out of range\n", opname);
- return -EINVAL;
- }
-
- if (q->bufs[b->index] == NULL) {
- /* Should never happen */
- dprintk(1, "%s: buffer is NULL\n", opname);
- return -EINVAL;
- }
-
- if (b->memory != q->memory) {
- dprintk(1, "%s: invalid memory type\n", opname);
- return -EINVAL;
- }
-
- return __verify_planes_array(q->bufs[b->index], b);
-}
-
-/**
- * vb2_prepare_buf() - Pass ownership of a buffer from userspace to the kernel
- * @q: videobuf2 queue
- * @b: buffer structure passed from userspace to vidioc_prepare_buf
- * handler in driver
- *
- * Should be called from vidioc_prepare_buf ioctl handler of a driver.
- * This function:
- * 1) verifies the passed buffer,
- * 2) calls buf_prepare callback in the driver (if provided), in which
- * driver-specific buffer initialization can be performed,
- *
- * The return values from this function are intended to be directly returned
- * from vidioc_prepare_buf handler in driver.
- */
-int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b)
-{
- struct vb2_buffer *vb;
- int ret;
-
- if (vb2_fileio_is_active(q)) {
- dprintk(1, "file io in progress\n");
- return -EBUSY;
- }
-
- ret = vb2_queue_or_prepare_buf(q, b, "prepare_buf");
- if (ret)
- return ret;
-
- vb = q->bufs[b->index];
- if (vb->state != VB2_BUF_STATE_DEQUEUED) {
- dprintk(1, "invalid buffer state %d\n",
- vb->state);
- return -EINVAL;
- }
-
- ret = __buf_prepare(vb, b);
- if (!ret) {
- /* Fill buffer information for the userspace */
- __fill_v4l2_buffer(vb, b);
-
- dprintk(1, "prepare of buffer %d succeeded\n",
- vb2_v4l2_index(vb));
- }
- return ret;
-}
-EXPORT_SYMBOL_GPL(vb2_prepare_buf);
-
-/**
- * vb2_start_streaming() - Attempt to start streaming.
- * @q: videobuf2 queue
- *
- * Attempt to start streaming. When this function is called there must be
- * at least q->min_buffers_needed buffers queued up (i.e. the minimum
- * number of buffers required for the DMA engine to function). If the
- * @start_streaming op fails it is supposed to return all the driver-owned
- * buffers back to vb2 in state QUEUED. Check if that happened and if
- * not warn and reclaim them forcefully.
- */
-static int vb2_start_streaming(struct vb2_queue *q)
+static int v4l2_set_timestamp(struct vb2_buffer *vb, void *pb)
{
- struct vb2_buffer *vb;
- int ret;
-
- /*
- * If any buffers were queued before streamon,
- * we can now pass them to driver for processing.
- */
- list_for_each_entry(vb, &q->queued_list, queued_entry)
- __enqueue_in_driver(vb);
-
- /* Tell the driver to start streaming */
- q->start_streaming_called = 1;
- ret = call_qop(q, start_streaming, q,
- atomic_read(&q->owned_by_drv_count));
- if (!ret)
- return 0;
-
- q->start_streaming_called = 0;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct v4l2_buffer *b = (struct v4l2_buffer *)pb;
+ struct vb2_queue *q = vb->vb2_queue;
- dprintk(1, "driver refused to start streaming\n");
- /*
- * If you see this warning, then the driver isn't cleaning up properly
- * after a failed start_streaming(). See the start_streaming()
- * documentation in videobuf2-v4l2.h for more information how buffers
- * should be returned to vb2 in start_streaming().
- */
- if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
- unsigned i;
+ if ((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
+ V4L2_BUF_FLAG_TIMESTAMP_COPY)
+ vbuf->v4l2_buf.timestamp = b->timestamp;
+ vbuf->v4l2_buf.flags |= b->flags & V4L2_BUF_FLAG_TIMECODE;
+ if (b->flags & V4L2_BUF_FLAG_TIMECODE)
+ vbuf->v4l2_buf.timecode = b->timecode;
- /*
- * Forcefully reclaim buffers if the driver did not
- * correctly return them to vb2.
- */
- for (i = 0; i < q->num_buffers; ++i) {
- vb = q->bufs[i];
- if (vb->state == VB2_BUF_STATE_ACTIVE)
- vb2_buffer_done(vb, VB2_BUF_STATE_QUEUED);
- }
- /* Must be zero now */
- WARN_ON(atomic_read(&q->owned_by_drv_count));
- }
- /*
- * If done_list is not empty, then start_streaming() didn't call
- * vb2_buffer_done(vb, VB2_BUF_STATE_QUEUED) but STATE_ERROR or
- * STATE_DONE.
- */
- WARN_ON(!list_empty(&q->done_list));
- return ret;
+ return 0;
}
-static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
+static int v4l2_is_last(struct vb2_buffer *vb)
{
- int ret = vb2_queue_or_prepare_buf(q, b, "qbuf");
- struct vb2_buffer *vb;
-
- if (ret)
- return ret;
-
- vb = q->bufs[b->index];
-
- switch (vb->state) {
- case VB2_BUF_STATE_DEQUEUED:
- ret = __buf_prepare(vb, b);
- if (ret)
- return ret;
- break;
- case VB2_BUF_STATE_PREPARED:
- break;
- case VB2_BUF_STATE_PREPARING:
- dprintk(1, "buffer still being prepared\n");
- return -EINVAL;
- default:
- dprintk(1, "invalid buffer state %d\n", vb->state);
- return -EINVAL;
- }
-
- /*
- * Add to the queued buffers list, a buffer will stay on it until
- * dequeued in dqbuf.
- */
- list_add_tail(&vb->queued_entry, &q->queued_list);
- q->queued_count++;
- q->waiting_for_buffers = false;
- vb->state = VB2_BUF_STATE_QUEUED;
- if (V4L2_TYPE_IS_OUTPUT(q->type)) {
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-
- /*
- * For output buffers copy the timestamp if needed,
- * and the timecode field and flag if needed.
- */
- if ((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
- V4L2_BUF_FLAG_TIMESTAMP_COPY)
- vbuf->v4l2_buf.timestamp = b->timestamp;
- vbuf->v4l2_buf.flags |= b->flags & V4L2_BUF_FLAG_TIMECODE;
- if (b->flags & V4L2_BUF_FLAG_TIMECODE)
- vbuf->v4l2_buf.timecode = b->timecode;
- }
-
- trace_vb2_qbuf(q, vb);
-
- /*
- * If already streaming, give the buffer to driver for processing.
- * If not, the buffer will be given to driver on next streamon.
- */
- if (q->start_streaming_called)
- __enqueue_in_driver(vb);
-
- /* Fill buffer information for the userspace */
- __fill_v4l2_buffer(vb, b);
-
- /*
- * If streamon has been called, and we haven't yet called
- * start_streaming() since not enough buffers were queued, and
- * we now have reached the minimum number of queued buffers,
- * then we can finally call start_streaming().
- */
- if (q->streaming && !q->start_streaming_called &&
- q->queued_count >= q->min_buffers_needed) {
- ret = vb2_start_streaming(q);
- if (ret)
- return ret;
- }
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- dprintk(1, "qbuf of buffer %d succeeded\n", vb2_v4l2_index(vb));
- return 0;
-}
+ return (vbuf->v4l2_buf.flags & V4L2_BUF_FLAG_LAST);
+}
+
+const struct vb2_buf_ops vb2_v4l2_buf_ops = {
+ .init_buffer = v4l2_init_buffer,
+ .get_index = v4l2_get_index,
+ .set_plane_length = v4l2_set_plane_length,
+ .get_plane_length = v4l2_get_plane_length,
+ .set_plane_offset = v4l2_set_plane_offset,
+ .get_plane_offset = v4l2_get_plane_offset,
+ .verify_planes = v4l2_verify_planes,
+ .fill_buffer = v4l2_fill_buffer,
+ .fill_vb2_buffer = v4l2_fill_vb2_buffer,
+ .prepare_buffer = v4l2_buf_prepare,
+ .set_timestamp = v4l2_set_timestamp,
+ .is_last = v4l2_is_last,
+};
/**
- * vb2_qbuf() - Queue a buffer from userspace
- * @q: videobuf2 queue
- * @b: buffer structure passed from userspace to vidioc_qbuf handler
+ * vb2_querybuf() - query video buffer information
+ * @q: videobuf queue
+ * @b: buffer struct passed from userspace to vidioc_querybuf handler
* in driver
*
- * Should be called from vidioc_qbuf ioctl handler of a driver.
- * This function:
- * 1) verifies the passed buffer,
- * 2) if necessary, calls buf_prepare callback in the driver (if provided), in
- * which driver-specific buffer initialization can be performed,
- * 3) if streaming is on, queues the buffer in driver by the means of buf_queue
- * callback for processing.
+ * Should be called from vidioc_querybuf ioctl handler in driver.
+ * This function will verify the passed v4l2_buffer structure and fill the
+ * relevant information for the userspace.
*
* The return values from this function are intended to be directly returned
- * from vidioc_qbuf handler in driver.
+ * from vidioc_querybuf handler in driver.
*/
-int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
+int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b)
{
- if (vb2_fileio_is_active(q)) {
- dprintk(1, "file io in progress\n");
- return -EBUSY;
- }
-
- return vb2_internal_qbuf(q, b);
+ return vb2_core_querybuf(q, b->type, b->index, b);
}
-EXPORT_SYMBOL_GPL(vb2_qbuf);
+EXPORT_SYMBOL(vb2_querybuf);
/**
- * __vb2_wait_for_done_vb() - wait for a buffer to become available
- * for dequeuing
- *
- * Will sleep if required for nonblocking == false.
+ * vb2_reqbufs() - Wrapper for __reqbufs() that also verifies the memory and
+ * type values.
+ * @q: videobuf2 queue
+ * @req: struct passed from userspace to vidioc_reqbufs handler in driver
*/
-static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
+int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
{
- /*
- * All operations on vb_done_list are performed under done_lock
- * spinlock protection. However, buffers may be removed from
- * it and returned to userspace only while holding both driver's
- * lock and the done_lock spinlock. Thus we can be sure that as
- * long as we hold the driver's lock, the list will remain not
- * empty if list_empty() check succeeds.
- */
-
- for (;;) {
- int ret;
-
- if (!q->streaming) {
- dprintk(1, "streaming off, will not wait for buffers\n");
- return -EINVAL;
- }
-
- if (q->error) {
- dprintk(1, "Queue in error state, will not wait for buffers\n");
- return -EIO;
- }
-
- if (q->last_buffer_dequeued) {
- dprintk(3, "last buffer dequeued already, will not wait for buffers\n");
- return -EPIPE;
- }
-
- if (!list_empty(&q->done_list)) {
- /*
- * Found a buffer that we were waiting for.
- */
- break;
- }
-
- if (nonblocking) {
- dprintk(1, "nonblocking and no buffers to dequeue, "
- "will not wait\n");
- return -EAGAIN;
- }
-
- /*
- * We are streaming and blocking, wait for another buffer to
- * become ready or for streamoff. Driver's lock is released to
- * allow streamoff or qbuf to be called while waiting.
- */
- call_void_qop(q, wait_prepare, q);
-
- /*
- * All locks have been released, it is safe to sleep now.
- */
- dprintk(3, "will sleep waiting for buffers\n");
- ret = wait_event_interruptible(q->done_wq,
- !list_empty(&q->done_list) || !q->streaming ||
- q->error);
+ int ret = __verify_memory_type(q, req->memory, req->type);
- /*
- * We need to reevaluate both conditions again after reacquiring
- * the locks or return an error if one occurred.
- */
- call_void_qop(q, wait_finish, q);
- if (ret) {
- dprintk(1, "sleep was interrupted\n");
- return ret;
- }
- }
- return 0;
+ return ret ? ret : vb2_core_reqbufs(q, req->memory, &req->count);
}
+EXPORT_SYMBOL_GPL(vb2_reqbufs);
/**
- * __vb2_get_done_vb() - get a buffer ready for dequeuing
- *
- * Will sleep if required for nonblocking == false.
+ * vb2_create_bufs() - Wrapper for __create_bufs() that also verifies the
+ * memory and type values.
+ * @q: videobuf2 queue
+ * @create: creation parameters, passed from userspace to vidioc_create_bufs
+ * handler in driver
*/
-static int __vb2_get_done_vb(struct vb2_queue *q, struct vb2_buffer **vb,
- struct v4l2_buffer *b, int nonblocking)
+int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *cb)
{
- unsigned long flags;
- int ret;
+ int ret = __verify_memory_type(q, cb->memory, cb->format.type);
- /*
- * Wait for at least one buffer to become available on the done_list.
- */
- ret = __vb2_wait_for_done_vb(q, nonblocking);
- if (ret)
- return ret;
-
- /*
- * Driver's lock has been held since we last verified that done_list
- * is not empty, so no need for another list_empty(done_list) check.
- */
- spin_lock_irqsave(&q->done_lock, flags);
- *vb = list_first_entry(&q->done_list, struct vb2_buffer, done_entry);
- /*
- * Only remove the buffer from done_list if v4l2_buffer can handle all
- * the planes.
- */
- ret = __verify_planes_array(*vb, b);
- if (!ret)
- list_del(&(*vb)->done_entry);
- spin_unlock_irqrestore(&q->done_lock, flags);
-
- return ret;
+ cb->index = q->num_buffers;
+ if (cb->count == 0)
+ return ret != -EBUSY ? ret : 0;
+ return ret ? ret : vb2_core_create_bufs(q, cb->memory, &cb->count, &cb->format);
}
+EXPORT_SYMBOL_GPL(vb2_create_bufs);
/**
- * vb2_wait_for_all_buffers() - wait until all buffers are given back to vb2
+ * vb2_prepare_buf() - Pass ownership of a buffer from userspace to the kernel
* @q: videobuf2 queue
+ * @b: buffer structure passed from userspace to vidioc_prepare_buf
+ * handler in driver
*
- * This function will wait until all buffers that have been given to the driver
- * by buf_queue() are given back to vb2 with vb2_buffer_done(). It doesn't call
- * wait_prepare, wait_finish pair. It is intended to be called with all locks
- * taken, for example from stop_streaming() callback.
- */
-int vb2_wait_for_all_buffers(struct vb2_queue *q)
-{
- if (!q->streaming) {
- dprintk(1, "streaming off, will not wait for buffers\n");
- return -EINVAL;
- }
-
- if (q->start_streaming_called)
- wait_event(q->done_wq, !atomic_read(&q->owned_by_drv_count));
- return 0;
-}
-EXPORT_SYMBOL_GPL(vb2_wait_for_all_buffers);
-
-/**
- * __vb2_dqbuf() - bring back the buffer to the DEQUEUED state
+ * Should be called from vidioc_prepare_buf ioctl handler of a driver.
+ * This function:
+ * 1) verifies the passed buffer,
+ * 2) calls buf_prepare callback in the driver (if provided), in which
+ * driver-specific buffer initialization can be performed,
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_prepare_buf handler in driver.
*/
-static void __vb2_dqbuf(struct vb2_buffer *vb)
+int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b)
{
- struct vb2_queue *q = vb->vb2_queue;
- unsigned int i;
-
- /* nothing to do if the buffer is already dequeued */
- if (vb->state == VB2_BUF_STATE_DEQUEUED)
- return;
-
- vb->state = VB2_BUF_STATE_DEQUEUED;
-
- /* unmap DMABUF buffer */
- if (q->memory == V4L2_MEMORY_DMABUF)
- for (i = 0; i < vb->num_planes; ++i) {
- if (!vb->planes[i].dbuf_mapped)
- continue;
- call_void_memop(vb, unmap_dmabuf, vb->planes[i].mem_priv);
- vb->planes[i].dbuf_mapped = 0;
- }
+ return vb2_core_prepare_buf(q, b->memory, b->type, b->index, b);
}
+EXPORT_SYMBOL_GPL(vb2_prepare_buf);
-static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking)
+/**
+ * vb2_qbuf() - Queue a buffer from userspace
+ * @q: videobuf2 queue
+ * @b: buffer structure passed from userspace to vidioc_qbuf handler
+ * in driver
+ *
+ * Should be called from vidioc_qbuf ioctl handler of a driver.
+ * This function:
+ * 1) verifies the passed buffer,
+ * 2) if necessary, calls buf_prepare callback in the driver (if provided), in
+ * which driver-specific buffer initialization can be performed,
+ * 3) if streaming is on, queues the buffer in driver by the means of buf_queue
+ * callback for processing.
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_qbuf handler in driver.
+ */
+int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
{
- struct vb2_buffer *vb = NULL;
- struct vb2_v4l2_buffer *vbuf = NULL;
- int ret;
-
- if (b->type != q->type) {
- dprintk(1, "invalid buffer type\n");
- return -EINVAL;
- }
- ret = __vb2_get_done_vb(q, &vb, b, nonblocking);
- if (ret < 0)
- return ret;
-
- switch (vb->state) {
- case VB2_BUF_STATE_DONE:
- dprintk(3, "returning done buffer\n");
- break;
- case VB2_BUF_STATE_ERROR:
- dprintk(3, "returning done buffer with errors\n");
- break;
- default:
- dprintk(1, "invalid buffer state\n");
- return -EINVAL;
+ if (vb2_fileio_is_active(q)) {
+ VB2_DEBUG(1, "file io in progress\n");
+ return -EBUSY;
}
- call_void_vb_qop(vb, buf_finish, vb);
-
- /* Fill buffer information for the userspace */
- __fill_v4l2_buffer(vb, b);
- /* Remove from videobuf queue */
- list_del(&vb->queued_entry);
- q->queued_count--;
-
- trace_vb2_dqbuf(q, vb);
-
- vbuf = to_vb2_v4l2_buffer(vb);
-
- if (!V4L2_TYPE_IS_OUTPUT(q->type) &&
- vbuf->v4l2_buf.flags & V4L2_BUF_FLAG_LAST)
- q->last_buffer_dequeued = true;
- /* go back to dequeued state */
- __vb2_dqbuf(vb);
-
- dprintk(1, "dqbuf of buffer %d, with state %d\n",
- vb2_v4l2_index(vb), vb->state);
-
- return 0;
+ return vb2_core_qbuf(q, b->memory, b->type, b->index, b);
}
+EXPORT_SYMBOL_GPL(vb2_qbuf);
/**
* vb2_dqbuf() - Dequeue a buffer to the userspace
@@ -2193,144 +853,29 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking)
{
if (vb2_fileio_is_active(q)) {
- dprintk(1, "file io in progress\n");
+ VB2_DEBUG(1, "file io in progress\n");
return -EBUSY;
}
- return vb2_internal_dqbuf(q, b, nonblocking);
+ return vb2_core_dqbuf(q, b->type, b, nonblocking);
}
EXPORT_SYMBOL_GPL(vb2_dqbuf);
/**
- * __vb2_queue_cancel() - cancel and stop (pause) streaming
- *
- * Removes all queued buffers from driver's queue and all buffers queued by
- * userspace from videobuf's queue. Returns to state after reqbufs.
- */
-static void __vb2_queue_cancel(struct vb2_queue *q)
-{
- unsigned int i;
-
- /*
- * Tell driver to stop all transactions and release all queued
- * buffers.
- */
- if (q->start_streaming_called)
- call_void_qop(q, stop_streaming, q);
-
- /*
- * If you see this warning, then the driver isn't cleaning up properly
- * in stop_streaming(). See the stop_streaming() documentation in
- * videobuf2-v4l2.h for more information how buffers should be returned
- * to vb2 in stop_streaming().
- */
- if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
- for (i = 0; i < q->num_buffers; ++i)
- if (q->bufs[i]->state == VB2_BUF_STATE_ACTIVE)
- vb2_buffer_done(q->bufs[i], VB2_BUF_STATE_ERROR);
- /* Must be zero now */
- WARN_ON(atomic_read(&q->owned_by_drv_count));
- }
-
- q->streaming = 0;
- q->start_streaming_called = 0;
- q->queued_count = 0;
- q->error = 0;
-
- /*
- * Remove all buffers from videobuf's list...
- */
- INIT_LIST_HEAD(&q->queued_list);
- /*
- * ...and done list; userspace will not receive any buffers it
- * has not already dequeued before initiating cancel.
- */
- INIT_LIST_HEAD(&q->done_list);
- atomic_set(&q->owned_by_drv_count, 0);
- wake_up_all(&q->done_wq);
-
- /*
- * Reinitialize all buffers for next use.
- * Make sure to call buf_finish for any queued buffers. Normally
- * that's done in dqbuf, but that's not going to happen when we
- * cancel the whole queue. Note: this code belongs here, not in
- * __vb2_dqbuf() since in vb2_internal_dqbuf() there is a critical
- * call to __fill_v4l2_buffer() after buf_finish(). That order can't
- * be changed, so we can't move the buf_finish() to __vb2_dqbuf().
- */
- for (i = 0; i < q->num_buffers; ++i) {
- struct vb2_buffer *vb = q->bufs[i];
-
- if (vb->state != VB2_BUF_STATE_DEQUEUED) {
- vb->state = VB2_BUF_STATE_PREPARED;
- call_void_vb_qop(vb, buf_finish, vb);
- }
- __vb2_dqbuf(vb);
- }
-}
-
-static int vb2_internal_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
-{
- int ret;
-
- if (type != q->type) {
- dprintk(1, "invalid stream type\n");
- return -EINVAL;
- }
-
- if (q->streaming) {
- dprintk(3, "already streaming\n");
- return 0;
- }
-
- if (!q->num_buffers) {
- dprintk(1, "no buffers have been allocated\n");
- return -EINVAL;
- }
-
- if (q->num_buffers < q->min_buffers_needed) {
- dprintk(1, "need at least %u allocated buffers\n",
- q->min_buffers_needed);
- return -EINVAL;
- }
-
- /*
- * Tell driver to start streaming provided sufficient buffers
- * are available.
- */
- if (q->queued_count >= q->min_buffers_needed) {
- ret = vb2_start_streaming(q);
- if (ret) {
- __vb2_queue_cancel(q);
- return ret;
- }
- }
-
- q->streaming = 1;
-
- dprintk(3, "successful\n");
- return 0;
-}
-
-/**
- * vb2_queue_error() - signal a fatal error on the queue
+ * vb2_expbuf() - Export a buffer as a file descriptor
* @q: videobuf2 queue
+ * @eb: export buffer structure passed from userspace to vidioc_expbuf
+ * handler in driver
*
- * Flag that a fatal unrecoverable error has occurred and wake up all processes
- * waiting on the queue. Polling will now set POLLERR and queuing and dequeuing
- * buffers will return -EIO.
- *
- * The error flag will be cleared when cancelling the queue, either from
- * vb2_streamoff or vb2_queue_release. Drivers should thus not call this
- * function before starting the stream, otherwise the error flag will remain set
- * until the queue is released when closing the device node.
+ * The return values from this function are intended to be directly returned
+ * from vidioc_expbuf handler in driver.
*/
-void vb2_queue_error(struct vb2_queue *q)
+int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
{
- q->error = 1;
+ eb->fd = vb2_core_expbuf(q, eb->type, eb->index, eb->plane, eb->flags);
- wake_up_all(&q->done_wq);
+ return 0;
}
-EXPORT_SYMBOL_GPL(vb2_queue_error);
+EXPORT_SYMBOL_GPL(vb2_expbuf);
/**
* vb2_streamon - start streaming
@@ -2348,36 +893,13 @@ EXPORT_SYMBOL_GPL(vb2_queue_error);
int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
{
if (vb2_fileio_is_active(q)) {
- dprintk(1, "file io in progress\n");
+ VB2_DEBUG(1, "file io in progress\n");
return -EBUSY;
}
- return vb2_internal_streamon(q, type);
-}
-EXPORT_SYMBOL_GPL(vb2_streamon);
-
-static int vb2_internal_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
-{
- if (type != q->type) {
- dprintk(1, "invalid stream type\n");
- return -EINVAL;
- }
- /*
- * Cancel will pause streaming and remove all buffers from the driver
- * and videobuf, effectively returning control over them to userspace.
- *
- * Note that we do this even if q->streaming == 0: if you prepare or
- * queue buffers, and then call streamoff without ever having called
- * streamon, you would still expect those buffers to be returned to
- * their normal dequeued state.
- */
- __vb2_queue_cancel(q);
- q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
- q->last_buffer_dequeued = false;
-
- dprintk(3, "successful\n");
- return 0;
+ return vb2_core_streamon(q, type);
}
+EXPORT_SYMBOL_GPL(vb2_streamon);
/**
* vb2_streamoff - stop streaming
@@ -2397,243 +919,13 @@ static int vb2_internal_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
{
if (vb2_fileio_is_active(q)) {
- dprintk(1, "file io in progress\n");
+ VB2_DEBUG(1, "file io in progress\n");
return -EBUSY;
}
- return vb2_internal_streamoff(q, type);
+ return vb2_core_streamoff(q, type);
}
EXPORT_SYMBOL_GPL(vb2_streamoff);
-/**
- * __find_plane_by_offset() - find plane associated with the given offset off
- */
-static int __find_plane_by_offset(struct vb2_queue *q, unsigned long off,
- unsigned int *_buffer, unsigned int *_plane)
-{
- struct vb2_buffer *vb;
- struct vb2_v4l2_buffer *vbuf;
- unsigned int buffer, plane;
-
- /*
- * Go over all buffers and their planes, comparing the given offset
- * with an offset assigned to each plane. If a match is found,
- * return its buffer and plane numbers.
- */
- for (buffer = 0; buffer < q->num_buffers; ++buffer) {
- vb = q->bufs[buffer];
- vbuf = to_vb2_v4l2_buffer(vb);
- for (plane = 0; plane < vb->num_planes; ++plane) {
- if (vbuf->v4l2_planes[plane].m.mem_offset == off) {
- *_buffer = buffer;
- *_plane = plane;
- return 0;
- }
- }
- }
-
- return -EINVAL;
-}
-
-/**
- * vb2_expbuf() - Export a buffer as a file descriptor
- * @q: videobuf2 queue
- * @eb: export buffer structure passed from userspace to vidioc_expbuf
- * handler in driver
- *
- * The return values from this function are intended to be directly returned
- * from vidioc_expbuf handler in driver.
- */
-int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
-{
- struct vb2_buffer *vb = NULL;
- struct vb2_plane *vb_plane;
- int ret;
- struct dma_buf *dbuf;
-
- if (q->memory != V4L2_MEMORY_MMAP) {
- dprintk(1, "queue is not currently set up for mmap\n");
- return -EINVAL;
- }
-
- if (!q->mem_ops->get_dmabuf) {
- dprintk(1, "queue does not support DMA buffer exporting\n");
- return -EINVAL;
- }
-
- if (eb->flags & ~(O_CLOEXEC | O_ACCMODE)) {
- dprintk(1, "queue does support only O_CLOEXEC and access mode flags\n");
- return -EINVAL;
- }
-
- if (eb->type != q->type) {
- dprintk(1, "invalid buffer type\n");
- return -EINVAL;
- }
-
- if (eb->index >= q->num_buffers) {
- dprintk(1, "buffer index out of range\n");
- return -EINVAL;
- }
-
- vb = q->bufs[eb->index];
-
- if (eb->plane >= vb->num_planes) {
- dprintk(1, "buffer plane out of range\n");
- return -EINVAL;
- }
-
- if (vb2_fileio_is_active(q)) {
- dprintk(1, "expbuf: file io in progress\n");
- return -EBUSY;
- }
-
- vb_plane = &vb->planes[eb->plane];
-
- dbuf = call_ptr_memop(vb, get_dmabuf, vb_plane->mem_priv, eb->flags & O_ACCMODE);
- if (IS_ERR_OR_NULL(dbuf)) {
- dprintk(1, "failed to export buffer %d, plane %d\n",
- eb->index, eb->plane);
- return -EINVAL;
- }
-
- ret = dma_buf_fd(dbuf, eb->flags & ~O_ACCMODE);
- if (ret < 0) {
- dprintk(3, "buffer %d, plane %d failed to export (%d)\n",
- eb->index, eb->plane, ret);
- dma_buf_put(dbuf);
- return ret;
- }
-
- dprintk(3, "buffer %d, plane %d exported as %d descriptor\n",
- eb->index, eb->plane, ret);
- eb->fd = ret;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(vb2_expbuf);
-
-/**
- * vb2_mmap() - map video buffers into application address space
- * @q: videobuf2 queue
- * @vma: vma passed to the mmap file operation handler in the driver
- *
- * Should be called from mmap file operation handler of a driver.
- * This function maps one plane of one of the available video buffers to
- * userspace. To map whole video memory allocated on reqbufs, this function
- * has to be called once per each plane per each buffer previously allocated.
- *
- * When the userspace application calls mmap, it passes to it an offset returned
- * to it earlier by the means of vidioc_querybuf handler. That offset acts as
- * a "cookie", which is then used to identify the plane to be mapped.
- * This function finds a plane with a matching offset and a mapping is performed
- * by the means of a provided memory operation.
- *
- * The return values from this function are intended to be directly returned
- * from the mmap handler in driver.
- */
-int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
-{
- unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
- struct vb2_buffer *vb;
- struct vb2_v4l2_buffer *vbuf;
- unsigned int buffer = 0, plane = 0;
- int ret;
- unsigned long length;
-
- if (q->memory != V4L2_MEMORY_MMAP) {
- dprintk(1, "queue is not currently set up for mmap\n");
- return -EINVAL;
- }
-
- /*
- * Check memory area access mode.
- */
- if (!(vma->vm_flags & VM_SHARED)) {
- dprintk(1, "invalid vma flags, VM_SHARED needed\n");
- return -EINVAL;
- }
- if (V4L2_TYPE_IS_OUTPUT(q->type)) {
- if (!(vma->vm_flags & VM_WRITE)) {
- dprintk(1, "invalid vma flags, VM_WRITE needed\n");
- return -EINVAL;
- }
- } else {
- if (!(vma->vm_flags & VM_READ)) {
- dprintk(1, "invalid vma flags, VM_READ needed\n");
- return -EINVAL;
- }
- }
- if (vb2_fileio_is_active(q)) {
- dprintk(1, "mmap: file io in progress\n");
- return -EBUSY;
- }
-
- /*
- * Find the plane corresponding to the offset passed by userspace.
- */
- ret = __find_plane_by_offset(q, off, &buffer, &plane);
- if (ret)
- return ret;
-
- vb = q->bufs[buffer];
- vbuf = to_vb2_v4l2_buffer(vb);
-
- /*
- * MMAP requires page_aligned buffers.
- * The buffer length was page_aligned at __vb2_buf_mem_alloc(),
- * so, we need to do the same here.
- */
- length = PAGE_ALIGN(vbuf->v4l2_planes[plane].length);
- if (length < (vma->vm_end - vma->vm_start)) {
- dprintk(1,
- "MMAP invalid, as it would overflow buffer length\n");
- return -EINVAL;
- }
-
- mutex_lock(&q->mmap_lock);
- ret = call_memop(vb, mmap, vb->planes[plane].mem_priv, vma);
- mutex_unlock(&q->mmap_lock);
- if (ret)
- return ret;
-
- dprintk(3, "buffer %d, plane %d successfully mapped\n", buffer, plane);
- return 0;
-}
-EXPORT_SYMBOL_GPL(vb2_mmap);
-
-#ifndef CONFIG_MMU
-unsigned long vb2_get_unmapped_area(struct vb2_queue *q,
- unsigned long addr,
- unsigned long len,
- unsigned long pgoff,
- unsigned long flags)
-{
- unsigned long off = pgoff << PAGE_SHIFT;
- struct vb2_buffer *vb;
- unsigned int buffer, plane;
- void *vaddr;
- int ret;
-
- if (q->memory != V4L2_MEMORY_MMAP) {
- dprintk(1, "queue is not currently set up for mmap\n");
- return -EINVAL;
- }
-
- /*
- * Find the plane corresponding to the offset passed by userspace.
- */
- ret = __find_plane_by_offset(q, off, &buffer, &plane);
- if (ret)
- return ret;
-
- vb = q->bufs[buffer];
-
- vaddr = vb2_plane_vaddr(vb, plane);
- return vaddr ? (unsigned long)vaddr : -EINVAL;
-}
-EXPORT_SYMBOL_GPL(vb2_get_unmapped_area);
-#endif
-
static int __vb2_init_fileio(struct vb2_queue *q, int read);
static int __vb2_cleanup_fileio(struct vb2_queue *q);
@@ -2757,22 +1049,20 @@ EXPORT_SYMBOL_GPL(vb2_poll);
* responsible of clearing it's content and setting initial values for some
* required entries before calling this function.
* q->ops, q->mem_ops, q->type and q->io_modes are mandatory. Please refer
- * to the struct vb2_queue description in include/media/videobuf2-v4l2.h
+ * to the struct vb2_queue description in include/media/videobuf2-core.h
* for more information.
*/
int vb2_queue_init(struct vb2_queue *q)
{
+ int ret = vb2_core_queue_init(q);
+
+ if (ret < 0)
+ return ret;
+
/*
* Sanity check
*/
- if (WARN_ON(!q) ||
- WARN_ON(!q->ops) ||
- WARN_ON(!q->mem_ops) ||
- WARN_ON(!q->type) ||
- WARN_ON(!q->io_modes) ||
- WARN_ON(!q->ops->queue_setup) ||
- WARN_ON(!q->ops->buf_queue) ||
- WARN_ON(q->timestamp_flags &
+ if (WARN_ON(q->timestamp_flags &
~(V4L2_BUF_FLAG_TIMESTAMP_MASK |
V4L2_BUF_FLAG_TSTAMP_SRC_MASK)))
return -EINVAL;
@@ -2781,15 +1071,11 @@ int vb2_queue_init(struct vb2_queue *q)
WARN_ON((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN);
- INIT_LIST_HEAD(&q->queued_list);
- INIT_LIST_HEAD(&q->done_list);
- spin_lock_init(&q->done_lock);
- mutex_init(&q->mmap_lock);
- init_waitqueue_head(&q->done_wq);
-
if (q->buf_struct_size == 0)
q->buf_struct_size = sizeof(struct vb2_v4l2_buffer);
+ q->buf_ops = &vb2_v4l2_buf_ops;
+
return 0;
}
EXPORT_SYMBOL_GPL(vb2_queue_init);
@@ -2805,10 +1091,7 @@ EXPORT_SYMBOL_GPL(vb2_queue_init);
void vb2_queue_release(struct vb2_queue *q)
{
__vb2_cleanup_fileio(q);
- __vb2_queue_cancel(q);
- mutex_lock(&q->mmap_lock);
- __vb2_queue_free(q, q->num_buffers);
- mutex_unlock(&q->mmap_lock);
+ vb2_core_queue_release(q);
}
EXPORT_SYMBOL_GPL(vb2_queue_release);
@@ -2898,7 +1181,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
*/
count = 1;
- dprintk(3, "setting up file io: mode %s, count %d, read_once %d, write_immediately %d\n",
+ VB2_DEBUG(3, "setting up file io: mode %s, count %d, read_once %d, write_immediately %d\n",
(read) ? "read" : "write", count, q->fileio_read_once,
q->fileio_write_immediately);
@@ -2917,7 +1200,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
fileio->req.memory = V4L2_MEMORY_MMAP;
fileio->req.type = q->type;
q->fileio = fileio;
- ret = __reqbufs(q, &fileio->req);
+ ret = vb2_core_reqbufs(q, fileio->req.memory, &fileio->req.count);
if (ret)
goto err_kfree;
@@ -2963,7 +1246,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
}
b->memory = q->memory;
b->index = i;
- ret = vb2_internal_qbuf(q, b);
+ ret = vb2_core_qbuf(q, b->memory, b->type, i, b);
if (ret)
goto err_reqbufs;
fileio->bufs[i].queued = 1;
@@ -2979,7 +1262,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
/*
* Start streaming.
*/
- ret = vb2_internal_streamon(q, q->type);
+ ret = vb2_core_streamon(q, q->type);
if (ret)
goto err_reqbufs;
@@ -2987,7 +1270,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
err_reqbufs:
fileio->req.count = 0;
- __reqbufs(q, &fileio->req);
+ vb2_core_reqbufs(q, fileio->req.memory, &fileio->req.count);
err_kfree:
q->fileio = NULL;
@@ -3004,12 +1287,12 @@ static int __vb2_cleanup_fileio(struct vb2_queue *q)
struct vb2_fileio_data *fileio = q->fileio;
if (fileio) {
- vb2_internal_streamoff(q, q->type);
+ vb2_core_streamoff(q, q->type);
q->fileio = NULL;
fileio->req.count = 0;
vb2_reqbufs(q, &fileio->req);
kfree(fileio);
- dprintk(3, "file io emulator closed\n");
+ VB2_DEBUG(3, "file io emulator closed\n");
}
return 0;
}
@@ -3039,7 +1322,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
V4L2_BUF_FLAG_TIMESTAMP_COPY;
int ret, index;
- dprintk(3, "mode %s, offset %ld, count %zd, %sblocking\n",
+ VB2_DEBUG(3, "mode %s, offset %ld, count %zd, %sblocking\n",
read ? "read" : "write", (long)*ppos, count,
nonblock ? "non" : "");
@@ -3051,7 +1334,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
*/
if (!vb2_fileio_is_active(q)) {
ret = __vb2_init_fileio(q, read);
- dprintk(3, "vb2_init_fileio result: %d\n", ret);
+ VB2_DEBUG(3, "vb2_init_fileio result: %d\n", ret);
if (ret)
return ret;
}
@@ -3073,8 +1356,8 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
fileio->b.m.planes = &fileio->p;
fileio->b.length = 1;
}
- ret = vb2_internal_dqbuf(q, &fileio->b, nonblock);
- dprintk(5, "vb2_dqbuf result: %d\n", ret);
+ ret = vb2_core_dqbuf(q, fileio->b.type, &fileio->b, nonblock);
+ VB2_DEBUG(5, "vb2_dqbuf result: %d\n", ret);
if (ret)
return ret;
fileio->dq_count += 1;
@@ -3104,20 +1387,20 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
*/
if (buf->pos + count > buf->size) {
count = buf->size - buf->pos;
- dprintk(5, "reducing read count: %zd\n", count);
+ VB2_DEBUG(5, "reducing read count: %zd\n", count);
}
/*
* Transfer data to userspace.
*/
- dprintk(3, "copying %zd bytes - buffer %d, offset %u\n",
+ VB2_DEBUG(3, "copying %zd bytes - buffer %d, offset %u\n",
count, index, buf->pos);
if (read)
ret = copy_to_user(data, buf->vaddr + buf->pos, count);
else
ret = copy_from_user(buf->vaddr + buf->pos, data, count);
if (ret) {
- dprintk(3, "error copying data\n");
+ VB2_DEBUG(3, "error copying data\n");
return -EFAULT;
}
@@ -3135,7 +1418,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
* Check if this is the last buffer to read.
*/
if (read && fileio->read_once && fileio->dq_count == 1) {
- dprintk(3, "read limit reached\n");
+ VB2_DEBUG(3, "read limit reached\n");
return __vb2_cleanup_fileio(q);
}
@@ -3155,8 +1438,9 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_
}
if (set_timestamp)
v4l2_get_timestamp(&fileio->b.timestamp);
- ret = vb2_internal_qbuf(q, &fileio->b);
- dprintk(5, "vb2_dbuf result: %d\n", ret);
+ ret = vb2_core_qbuf(q, fileio->b.memory, fileio->b.type, index,
+ &fileio->b);
+ VB2_DEBUG(5, "vb2_dbuf result: %d\n", ret);
if (ret)
return ret;
@@ -3247,9 +1531,9 @@ static int vb2_thread(void *data)
} else {
call_void_qop(q, wait_finish, q);
if (!threadio->stop)
- ret = vb2_internal_dqbuf(q, &fileio->b, 0);
+ ret = vb2_core_dqbuf(q, fileio->b.type, &fileio->b, 0);
call_void_qop(q, wait_prepare, q);
- dprintk(5, "file io: vb2_dqbuf result: %d\n", ret);
+ VB2_DEBUG(5, "file io: vb2_dqbuf result: %d\n", ret);
}
if (ret || threadio->stop)
break;
@@ -3263,7 +1547,8 @@ static int vb2_thread(void *data)
if (set_timestamp)
v4l2_get_timestamp(&fileio->b.timestamp);
if (!threadio->stop)
- ret = vb2_internal_qbuf(q, &fileio->b);
+ ret = vb2_core_qbuf(q, fileio->b.memory,
+ fileio->b.type, fileio->b.index, &fileio->b);
call_void_qop(q, wait_prepare, q);
if (ret || threadio->stop)
break;
@@ -3302,7 +1587,7 @@ int vb2_thread_start(struct vb2_queue *q, vb2_thread_fnc fnc, void *priv,
threadio->priv = priv;
ret = __vb2_init_fileio(q, !V4L2_TYPE_IS_OUTPUT(q->type));
- dprintk(3, "file io: vb2_init_fileio result: %d\n", ret);
+ VB2_DEBUG(3, "file io: vb2_init_fileio result: %d\n", ret);
if (ret)
goto nomem;
q->threadio = threadio;
@@ -3367,7 +1652,7 @@ int vb2_ioctl_reqbufs(struct file *file, void *priv,
return res;
if (vb2_queue_is_busy(vdev, file))
return -EBUSY;
- res = __reqbufs(vdev->queue, p);
+ res = vb2_core_reqbufs(vdev->queue, p->memory, &p->count);
/* If count == 0, then the owner has released all buffers and he
is no longer owner of the queue. Otherwise we have a new owner. */
if (res == 0)
@@ -3391,7 +1676,7 @@ int vb2_ioctl_create_bufs(struct file *file, void *priv,
return res;
if (vb2_queue_is_busy(vdev, file))
return -EBUSY;
- res = __create_bufs(vdev->queue, p);
+ res = vb2_core_create_bufs(vdev->queue, p->memory, &p->count, &p->format);
if (res == 0)
vdev->queue->owner = file->private_data;
return res;
@@ -3405,7 +1690,8 @@ int vb2_ioctl_prepare_buf(struct file *file, void *priv,
if (vb2_queue_is_busy(vdev, file))
return -EBUSY;
- return vb2_prepare_buf(vdev->queue, p);
+ return vb2_core_prepare_buf(vdev->queue,
+ p->memory, p->type, p->index, p);
}
EXPORT_SYMBOL_GPL(vb2_ioctl_prepare_buf);
diff --git a/drivers/media/v4l2-core/videobuf2-vmalloc.c b/drivers/media/v4l2-core/videobuf2-vmalloc.c
index 45da6cd..2fe4c27 100644
--- a/drivers/media/v4l2-core/videobuf2-vmalloc.c
+++ b/drivers/media/v4l2-core/videobuf2-vmalloc.c
@@ -17,7 +17,7 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
#include <media/videobuf2-vmalloc.h>
#include <media/videobuf2-memops.h>
diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c
index d903ece..264d76f 100644
--- a/drivers/usb/gadget/function/uvc_queue.c
+++ b/drivers/usb/gadget/function/uvc_queue.c
@@ -41,7 +41,7 @@
* videobuf2 queue operations
*/
-static int uvc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int uvc_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
new file mode 100644
index 0000000..dc405da
--- /dev/null
+++ b/include/media/videobuf2-core.h
@@ -0,0 +1,724 @@
+/*
+ * videobuf2-core.h - Video Buffer 2 Core Framework
+ *
+ * Copyright (C) 2010 Samsung Electronics
+ *
+ * Author: Pawel Osciak <pawel@xxxxxxxxxx>
+ *
+ * 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.
+ */
+#ifndef _MEDIA_VIDEOBUF2_CORE_H
+#define _MEDIA_VIDEOBUF2_CORE_H
+
+#include <linux/mm_types.h>
+#include <linux/mutex.h>
+#include <linux/poll.h>
+#include <linux/videodev2.h>
+#include <linux/dma-buf.h>
+
+struct vb2_alloc_ctx;
+struct vb2_fileio_data;
+struct vb2_threadio_data;
+
+/**
+ * struct vb2_mem_ops - memory handling/memory allocator operations
+ * @alloc: allocate video memory and, optionally, allocator private data,
+ * return NULL on failure or a pointer to allocator private,
+ * per-buffer data on success; the returned private structure
+ * will then be passed as buf_priv argument to other ops in this
+ * structure. Additional gfp_flags to use when allocating the
+ * are also passed to this operation. These flags are from the
+ * gfp_flags field of vb2_queue.
+ * @put: inform the allocator that the buffer will no longer be used;
+ * usually will result in the allocator freeing the buffer (if
+ * no other users of this buffer are present); the buf_priv
+ * argument is the allocator private per-buffer structure
+ * previously returned from the alloc callback.
+ * @get_userptr: acquire userspace memory for a hardware operation; used for
+ * USERPTR memory types; vaddr is the address passed to the
+ * videobuf layer when queuing a video buffer of USERPTR type;
+ * should return an allocator private per-buffer structure
+ * associated with the buffer on success, NULL on failure;
+ * the returned private structure will then be passed as buf_priv
+ * argument to other ops in this structure.
+ * @put_userptr: inform the allocator that a USERPTR buffer will no longer
+ * be used.
+ * @attach_dmabuf: attach a shared struct dma_buf for a hardware operation;
+ * used for DMABUF memory types; alloc_ctx is the alloc context
+ * dbuf is the shared dma_buf; returns NULL on failure;
+ * allocator private per-buffer structure on success;
+ * this needs to be used for further accesses to the buffer.
+ * @detach_dmabuf: inform the exporter of the buffer that the current DMABUF
+ * buffer is no longer used; the buf_priv argument is the
+ * allocator private per-buffer structure previously returned
+ * from the attach_dmabuf callback.
+ * @map_dmabuf: request for access to the dmabuf from allocator; the allocator
+ * of dmabuf is informed that this driver is going to use the
+ * dmabuf.
+ * @unmap_dmabuf: releases access control to the dmabuf - allocator is notified
+ * that this driver is done using the dmabuf for now.
+ * @prepare: called every time the buffer is passed from userspace to the
+ * driver, useful for cache synchronisation, optional.
+ * @finish: called every time the buffer is passed back from the driver
+ * to the userspace, also optional.
+ * @vaddr: return a kernel virtual address to a given memory buffer
+ * associated with the passed private structure or NULL if no
+ * such mapping exists.
+ * @cookie: return allocator specific cookie for a given memory buffer
+ * associated with the passed private structure or NULL if not
+ * available.
+ * @num_users: return the current number of users of a memory buffer;
+ * return 1 if the videobuf layer (or actually the driver using
+ * it) is the only user.
+ * @mmap: setup a userspace mapping for a given memory buffer under
+ * the provided virtual memory region.
+ *
+ * Required ops for USERPTR types: get_userptr, put_userptr.
+ * Required ops for MMAP types: alloc, put, num_users, mmap.
+ * Required ops for read/write access types: alloc, put, num_users, vaddr.
+ * Required ops for DMABUF types: attach_dmabuf, detach_dmabuf, map_dmabuf,
+ * unmap_dmabuf.
+ */
+struct vb2_mem_ops {
+ void *(*alloc)(void *alloc_ctx, unsigned long size,
+ enum dma_data_direction dma_dir,
+ gfp_t gfp_flags);
+ void (*put)(void *buf_priv);
+ struct dma_buf *(*get_dmabuf)(void *buf_priv, unsigned long flags);
+
+ void *(*get_userptr)(void *alloc_ctx, unsigned long vaddr,
+ unsigned long size,
+ enum dma_data_direction dma_dir);
+ void (*put_userptr)(void *buf_priv);
+
+ void (*prepare)(void *buf_priv);
+ void (*finish)(void *buf_priv);
+
+ void *(*attach_dmabuf)(void *alloc_ctx, struct dma_buf *dbuf,
+ unsigned long size,
+ enum dma_data_direction dma_dir);
+ void (*detach_dmabuf)(void *buf_priv);
+ int (*map_dmabuf)(void *buf_priv);
+ void (*unmap_dmabuf)(void *buf_priv);
+
+ void *(*vaddr)(void *buf_priv);
+ void *(*cookie)(void *buf_priv);
+
+ unsigned int (*num_users)(void *buf_priv);
+
+ int (*mmap)(void *buf_priv, struct vm_area_struct *vma);
+};
+
+struct vb2_plane {
+ void *mem_priv;
+ struct dma_buf *dbuf;
+ unsigned int dbuf_mapped;
+};
+
+/**
+ * enum vb2_io_modes - queue access methods
+ * @VB2_MMAP: driver supports MMAP with streaming API
+ * @VB2_USERPTR: driver supports USERPTR with streaming API
+ * @VB2_READ: driver supports read() style access
+ * @VB2_WRITE: driver supports write() style access
+ * @VB2_DMABUF: driver supports DMABUF with streaming API
+ */
+enum vb2_io_modes {
+ VB2_MMAP = (1 << 0),
+ VB2_USERPTR = (1 << 1),
+ VB2_READ = (1 << 2),
+ VB2_WRITE = (1 << 3),
+ VB2_DMABUF = (1 << 4),
+};
+
+/**
+ * enum vb2_buffer_state - current video buffer state
+ * @VB2_BUF_STATE_DEQUEUED: buffer under userspace control
+ * @VB2_BUF_STATE_PREPARING: buffer is being prepared in videobuf
+ * @VB2_BUF_STATE_PREPARED: buffer prepared in videobuf and by the driver
+ * @VB2_BUF_STATE_QUEUED: buffer queued in videobuf, but not in driver
+ * @VB2_BUF_STATE_ACTIVE: buffer queued in driver and possibly used
+ * in a hardware operation
+ * @VB2_BUF_STATE_DONE: buffer returned from driver to videobuf, but
+ * not yet dequeued to userspace
+ * @VB2_BUF_STATE_ERROR: same as above, but the operation on the buffer
+ * has ended with an error, which will be reported
+ * to the userspace when it is dequeued
+ */
+enum vb2_buffer_state {
+ VB2_BUF_STATE_DEQUEUED,
+ VB2_BUF_STATE_PREPARING,
+ VB2_BUF_STATE_PREPARED,
+ VB2_BUF_STATE_QUEUED,
+ VB2_BUF_STATE_ACTIVE,
+ VB2_BUF_STATE_DONE,
+ VB2_BUF_STATE_ERROR,
+};
+
+struct vb2_queue;
+
+/**
+ * struct vb2_buffer - represents a video buffer
+ * @vb2_queue: the queue to which this driver belongs
+ * @num_planes: number of planes in the buffer
+ * on an internal driver queue
+ * @state: current buffer state; do not change
+ * @queued_entry: entry on the queued buffers list, which holds all
+ * buffers queued from userspace
+ * @done_entry: entry on the list that stores all buffers ready to
+ * be dequeued to userspace
+ * @planes: private per-plane information; do not change
+ */
+struct vb2_buffer {
+ struct vb2_queue *vb2_queue;
+ unsigned int num_planes;
+
+/* Private: internal use only */
+ enum vb2_buffer_state state;
+
+ struct list_head queued_entry;
+ struct list_head done_entry;
+
+ struct vb2_plane planes[VIDEO_MAX_PLANES];
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ /*
+ * Counters for how often these buffer-related ops are
+ * called. Used to check for unbalanced ops.
+ */
+ u32 cnt_mem_alloc;
+ u32 cnt_mem_put;
+ u32 cnt_mem_get_dmabuf;
+ u32 cnt_mem_get_userptr;
+ u32 cnt_mem_put_userptr;
+ u32 cnt_mem_prepare;
+ u32 cnt_mem_finish;
+ u32 cnt_mem_attach_dmabuf;
+ u32 cnt_mem_detach_dmabuf;
+ u32 cnt_mem_map_dmabuf;
+ u32 cnt_mem_unmap_dmabuf;
+ u32 cnt_mem_vaddr;
+ u32 cnt_mem_cookie;
+ u32 cnt_mem_num_users;
+ u32 cnt_mem_mmap;
+
+ u32 cnt_buf_init;
+ u32 cnt_buf_prepare;
+ u32 cnt_buf_finish;
+ u32 cnt_buf_cleanup;
+ u32 cnt_buf_queue;
+
+ /* This counts the number of calls to vb2_buffer_done() */
+ u32 cnt_buf_done;
+#endif
+};
+
+/**
+ * struct vb2_ops - driver-specific callbacks
+ *
+ * @queue_setup: called from VIDIOC_REQBUFS and VIDIOC_CREATE_BUFS
+ * handlers before memory allocation, or, if
+ * *num_planes != 0, after the allocation to verify a
+ * smaller number of buffers. Driver should return
+ * the required number of buffers in *num_buffers, the
+ * required number of planes per buffer in *num_planes; the
+ * size of each plane should be set in the sizes[] array
+ * and optional per-plane allocator specific context in the
+ * alloc_ctxs[] array. When called from VIDIOC_REQBUFS,
+ * fmt == NULL, the driver has to use the currently
+ * configured format and *num_buffers is the total number
+ * of buffers, that are being allocated. When called from
+ * VIDIOC_CREATE_BUFS, fmt != NULL and it describes the
+ * target frame format (if the format isn't valid the
+ * callback must return -EINVAL). In this case *num_buffers
+ * are being allocated additionally to q->num_buffers.
+ * @wait_prepare: release any locks taken while calling vb2 functions;
+ * it is called before an ioctl needs to wait for a new
+ * buffer to arrive; required to avoid a deadlock in
+ * blocking access type.
+ * @wait_finish: reacquire all locks released in the previous callback;
+ * required to continue operation after sleeping while
+ * waiting for a new buffer to arrive.
+ * @buf_init: called once after allocating a buffer (in MMAP case)
+ * or after acquiring a new USERPTR buffer; drivers may
+ * perform additional buffer-related initialization;
+ * initialization failure (return != 0) will prevent
+ * queue setup from completing successfully; optional.
+ * @buf_prepare: called every time the buffer is queued from userspace
+ * and from the VIDIOC_PREPARE_BUF ioctl; drivers may
+ * perform any initialization required before each
+ * hardware operation in this callback; drivers can
+ * access/modify the buffer here as it is still synced for
+ * the CPU; drivers that support VIDIOC_CREATE_BUFS must
+ * also validate the buffer size; if an error is returned,
+ * the buffer will not be queued in driver; optional.
+ * @buf_finish: called before every dequeue of the buffer back to
+ * userspace; the buffer is synced for the CPU, so drivers
+ * can access/modify the buffer contents; drivers may
+ * perform any operations required before userspace
+ * accesses the buffer; optional. The buffer state can be
+ * one of the following: DONE and ERROR occur while
+ * streaming is in progress, and the PREPARED state occurs
+ * when the queue has been canceled and all pending
+ * buffers are being returned to their default DEQUEUED
+ * state. Typically you only have to do something if the
+ * state is VB2_BUF_STATE_DONE, since in all other cases
+ * the buffer contents will be ignored anyway.
+ * @buf_cleanup: called once before the buffer is freed; drivers may
+ * perform any additional cleanup; optional.
+ * @start_streaming: called once to enter 'streaming' state; the driver may
+ * receive buffers with @buf_queue callback before
+ * @start_streaming is called; the driver gets the number
+ * of already queued buffers in count parameter; driver
+ * can return an error if hardware fails, in that case all
+ * buffers that have been already given by the @buf_queue
+ * callback are to be returned by the driver by calling
+ * @vb2_buffer_done(VB2_BUF_STATE_QUEUED).
+ * If you need a minimum number of buffers before you can
+ * start streaming, then set @min_buffers_needed in the
+ * vb2_queue structure. If that is non-zero then
+ * start_streaming won't be called until at least that
+ * many buffers have been queued up by userspace.
+ * @stop_streaming: called when 'streaming' state must be disabled; driver
+ * should stop any DMA transactions or wait until they
+ * finish and give back all buffers it got from buf_queue()
+ * callback by calling @vb2_buffer_done() with either
+ * VB2_BUF_STATE_DONE or VB2_BUF_STATE_ERROR; may use
+ * vb2_wait_for_all_buffers() function
+ * @buf_queue: passes buffer vb to the driver; driver may start
+ * hardware operation on this buffer; driver should give
+ * the buffer back by calling vb2_buffer_done() function;
+ * it is allways called after calling STREAMON ioctl;
+ * might be called before start_streaming callback if user
+ * pre-queued buffers before calling STREAMON.
+ */
+struct vb2_ops {
+ int (*queue_setup)(struct vb2_queue *q, const void *parg,
+ unsigned int *num_buffers, unsigned int *num_planes,
+ unsigned int sizes[], void *alloc_ctxs[]);
+
+ void (*wait_prepare)(struct vb2_queue *q);
+ void (*wait_finish)(struct vb2_queue *q);
+
+ int (*buf_init)(struct vb2_buffer *vb);
+ int (*buf_prepare)(struct vb2_buffer *vb);
+ void (*buf_finish)(struct vb2_buffer *vb);
+ void (*buf_cleanup)(struct vb2_buffer *vb);
+
+ int (*start_streaming)(struct vb2_queue *q, unsigned int count);
+ void (*stop_streaming)(struct vb2_queue *q);
+
+ void (*buf_queue)(struct vb2_buffer *vb);
+};
+
+struct vb2_buf_ops {
+ int (*init_buffer)(struct vb2_buffer *vb, unsigned int memory,
+ unsigned int type, unsigned int index, unsigned int planes);
+ unsigned int (*get_index)(struct vb2_buffer *vb);
+ int (*set_plane_length)(struct vb2_buffer *vb, int plane,
+ unsigned int length);
+ unsigned int (*get_plane_length)(struct vb2_buffer *vb, int plane);
+ int (*set_plane_offset)(struct vb2_buffer *vb, int plane,
+ unsigned int offset);
+ unsigned int (*get_plane_offset)(struct vb2_buffer *vb, int plane);
+ int (*verify_planes)(struct vb2_buffer *vb, void *pb);
+ int (*fill_buffer)(struct vb2_buffer *vb, void *pb);
+ int (*fill_vb2_buffer)(struct vb2_buffer *vb, const void *pb,
+ void *planes);
+ int (*prepare_buffer)(struct vb2_buffer *vb, void *pb);
+ int (*set_timestamp)(struct vb2_buffer *vb, void *pb);
+ int (*is_last)(struct vb2_buffer *vb);
+};
+
+/**
+ * struct vb2_queue - a videobuf queue
+ *
+ * @type: queue type (see V4L2_BUF_TYPE_* in linux/videodev2.h
+ * @io_modes: supported io methods (see vb2_io_modes enum)
+ * @fileio_read_once: report EOF after reading the first buffer
+ * @fileio_write_immediately: queue buffer after each write() call
+ * @allow_zero_bytesused: allow bytesused == 0 to be passed to the driver
+ * @lock: pointer to a mutex that protects the vb2_queue struct. The
+ * driver can set this to a mutex to let the vb2 core serialize
+ * the queuing ioctls. If the driver wants to handle locking
+ * itself, then this should be set to NULL. This lock is not used
+ * by the videobuf2 core API.
+ * @owner: The filehandle that 'owns' the buffers, i.e. the filehandle
+ * that called reqbufs, create_buffers or started fileio.
+ * This field is not used by the videobuf2 core API, but it allows
+ * drivers to easily associate an owner filehandle with the queue.
+ * @ops: driver-specific callbacks
+ * @mem_ops: memory allocator specific callbacks
+ * @drv_priv: driver private data
+ * @buf_struct_size: size of the driver-specific buffer structure;
+ * "0" indicates the driver doesn't want to use a custom buffer
+ * structure type, so, sizeof(struct vb2_v4l2_buffer) will is used
+ * in case of v4l2.
+ * @timestamp_flags: Timestamp flags; V4L2_BUF_FLAG_TIMESTAMP_* and
+ * V4L2_BUF_FLAG_TSTAMP_SRC_*
+ * @gfp_flags: additional gfp flags used when allocating the buffers.
+ * Typically this is 0, but it may be e.g. GFP_DMA or __GFP_DMA32
+ * to force the buffer allocation to a specific memory zone.
+ * @min_buffers_needed: the minimum number of buffers needed before
+ * start_streaming() can be called. Used when a DMA engine
+ * cannot be started unless at least this number of buffers
+ * have been queued into the driver.
+ *
+ * @mmap_lock: private mutex used when buffers are allocated/freed/mmapped
+ * @memory: current memory type used
+ * @bufs: videobuf buffer structures
+ * @num_buffers: number of allocated/used buffers
+ * @queued_list: list of buffers currently queued from userspace
+ * @queued_count: number of buffers queued and ready for streaming.
+ * @owned_by_drv_count: number of buffers owned by the driver
+ * @done_list: list of buffers ready to be dequeued to userspace
+ * @done_lock: lock to protect done_list list
+ * @done_wq: waitqueue for processes waiting for buffers ready to be dequeued
+ * @alloc_ctx: memory type/allocator-specific contexts for each plane
+ * @streaming: current streaming state
+ * @start_streaming_called: start_streaming() was called successfully and we
+ * started streaming.
+ * @error: a fatal error occurred on the queue
+ * @waiting_for_buffers: used in poll() to check if vb2 is still waiting for
+ * buffers. Only set for capture queues if qbuf has not yet been
+ * called since poll() needs to return POLLERR in that situation.
+ * @last_buffer_dequeued: used in poll() and DQBUF to immediately return if the
+ * last decoded buffer was already dequeued. Set for capture queues
+ * when a buffer with the V4L2_BUF_FLAG_LAST is dequeued.
+ * @fileio: file io emulator internal data, used only if emulator is active
+ * @threadio: thread io internal data, used only if thread is active
+ */
+struct vb2_queue {
+ unsigned int type;
+ unsigned int io_modes;
+ unsigned fileio_read_once:1;
+ unsigned fileio_write_immediately:1;
+ unsigned allow_zero_bytesused:1;
+
+ struct mutex *lock;
+ void *owner;
+
+ const struct vb2_ops *ops;
+ const struct vb2_mem_ops *mem_ops;
+ const struct vb2_buf_ops *buf_ops;
+
+ void *drv_priv;
+ unsigned int buf_struct_size;
+ u32 timestamp_flags;
+ gfp_t gfp_flags;
+ u32 min_buffers_needed;
+
+/* private: internal use only */
+ struct mutex mmap_lock;
+ unsigned int memory;
+ struct vb2_buffer *bufs[VIDEO_MAX_FRAME];
+ unsigned int num_buffers;
+
+ struct list_head queued_list;
+ unsigned int queued_count;
+
+ atomic_t owned_by_drv_count;
+ struct list_head done_list;
+ spinlock_t done_lock;
+ wait_queue_head_t done_wq;
+
+ void *alloc_ctx[VIDEO_MAX_PLANES];
+ unsigned int plane_sizes[VIDEO_MAX_PLANES];
+
+ unsigned int streaming:1;
+ unsigned int start_streaming_called:1;
+ unsigned int error:1;
+ unsigned int waiting_for_buffers:1;
+ unsigned int last_buffer_dequeued:1;
+
+ struct vb2_fileio_data *fileio;
+ struct vb2_threadio_data *threadio;
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ /*
+ * Counters for how often these queue-related ops are
+ * called. Used to check for unbalanced ops.
+ */
+ u32 cnt_queue_setup;
+ u32 cnt_wait_prepare;
+ u32 cnt_wait_finish;
+ u32 cnt_start_streaming;
+ u32 cnt_stop_streaming;
+#endif
+};
+
+extern int vb2_debug;
+
+#define VB2_DEBUG(level, fmt, arg...) \
+ do { \
+ if (vb2_debug >= level) \
+ pr_info("vb2-core: %s: " fmt, __func__, ## arg); \
+ } while (0)
+
+#define call_bufop(q, op, args...) \
+({ \
+ int ret = 0; \
+ \
+ if(q && q->buf_ops && q->buf_ops->op) \
+ ret = q->buf_ops->op(args); \
+ ret; \
+})
+
+#define call_u32_bufop(q, op, args...) \
+({ \
+ unsigned int ret = 0; \
+ \
+ if(q && q->buf_ops && q->buf_ops->op) \
+ ret = q->buf_ops->op(args); \
+ ret; \
+})
+
+#define vb2_index(vb) (call_u32_bufop((vb)->vb2_queue, get_index, vb))
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+
+/*
+ * If advanced debugging is on, then count how often each op is called
+ * successfully, which can either be per-buffer or per-queue.
+ *
+ * This makes it easy to check that the 'init' and 'cleanup'
+ * (and variations thereof) stay balanced.
+ */
+
+#define log_memop(vb, op) \
+ VB2_DEBUG(2, "call_memop(%p, %d, %s)%s\n", \
+ (vb)->vb2_queue, vb2_index(vb), #op, \
+ (vb)->vb2_queue->mem_ops->op ? "" : " (nop)")
+
+#define call_memop(vb, op, args...) \
+({ \
+ struct vb2_queue *_q = (vb)->vb2_queue; \
+ int err; \
+ \
+ log_memop(vb, op); \
+ err = _q->mem_ops->op ? _q->mem_ops->op(args) : 0; \
+ if (!err) \
+ (vb)->cnt_mem_ ## op++; \
+ err; \
+})
+
+#define call_ptr_memop(vb, op, args...) \
+({ \
+ struct vb2_queue *_q = (vb)->vb2_queue; \
+ void *ptr; \
+ \
+ log_memop(vb, op); \
+ ptr = _q->mem_ops->op ? _q->mem_ops->op(args) : NULL; \
+ if (!IS_ERR_OR_NULL(ptr)) \
+ (vb)->cnt_mem_ ## op++; \
+ ptr; \
+})
+
+#define call_void_memop(vb, op, args...) \
+({ \
+ struct vb2_queue *_q = (vb)->vb2_queue; \
+ \
+ log_memop(vb, op); \
+ if (_q->mem_ops->op) \
+ _q->mem_ops->op(args); \
+ (vb)->cnt_mem_ ## op++; \
+})
+
+#define log_qop(q, op) \
+ VB2_DEBUG(2, "call_qop(%p, %s)%s\n", q, #op, \
+ (q)->ops->op ? "" : " (nop)")
+
+#define call_qop(q, op, args...) \
+({ \
+ int err; \
+ \
+ log_qop(q, op); \
+ err = (q)->ops->op ? (q)->ops->op(args) : 0; \
+ if (!err) \
+ (q)->cnt_ ## op++; \
+ err; \
+})
+
+#define call_void_qop(q, op, args...) \
+({ \
+ log_qop(q, op); \
+ if ((q)->ops->op) \
+ (q)->ops->op(args); \
+ (q)->cnt_ ## op++; \
+})
+
+#define log_vb_qop(vb, op, args...) \
+ VB2_DEBUG(2, "call_vb_qop(%p, %d, %s)%s\n", \
+ (vb)->vb2_queue, vb2_index(vb), #op, \
+ (vb)->vb2_queue->ops->op ? "" : " (nop)")
+
+#define call_vb_qop(vb, op, args...) \
+({ \
+ int err; \
+ \
+ log_vb_qop(vb, op); \
+ err = (vb)->vb2_queue->ops->op ? \
+ (vb)->vb2_queue->ops->op(args) : 0; \
+ if (!err) \
+ (vb)->cnt_ ## op++; \
+ err; \
+})
+
+#define call_void_vb_qop(vb, op, args...) \
+({ \
+ log_vb_qop(vb, op); \
+ if ((vb)->vb2_queue->ops->op) \
+ (vb)->vb2_queue->ops->op(args); \
+ (vb)->cnt_ ## op++; \
+})
+
+#else
+
+#define call_memop(vb, op, args...) \
+ ((vb)->vb2_queue->mem_ops->op ? \
+ (vb)->vb2_queue->mem_ops->op(args) : 0)
+
+#define call_ptr_memop(vb, op, args...) \
+ ((vb)->vb2_queue->mem_ops->op ? \
+ (vb)->vb2_queue->mem_ops->op(args) : NULL)
+
+#define call_void_memop(vb, op, args...) \
+ do { \
+ if ((vb)->vb2_queue->mem_ops->op) \
+ (vb)->vb2_queue->mem_ops->op(args); \
+ } while (0)
+
+#define call_qop(q, op, args...) \
+ ((q)->ops->op ? (q)->ops->op(args) : 0)
+
+#define call_void_qop(q, op, args...) \
+ do { \
+ if ((q)->ops->op) \
+ (q)->ops->op(args); \
+ } while (0)
+
+#define call_vb_qop(vb, op, args...) \
+ ((vb)->vb2_queue->ops->op ? (vb)->vb2_queue->ops->op(args) : 0)
+
+#define call_void_vb_qop(vb, op, args...) \
+ do { \
+ if ((vb)->vb2_queue->ops->op) \
+ (vb)->vb2_queue->ops->op(args); \
+ } while (0)
+
+#endif
+
+void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no);
+void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no);
+
+void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state);
+void vb2_discard_done(struct vb2_queue *q);
+int vb2_wait_for_all_buffers(struct vb2_queue *q);
+
+int vb2_core_querybuf(struct vb2_queue *q, unsigned int type,
+ unsigned int index, void *pb);
+int vb2_core_reqbufs(struct vb2_queue *q, unsigned int memory, unsigned int *count);
+int vb2_core_create_bufs(struct vb2_queue *q, unsigned int memory,
+ unsigned int *count, void *parg);
+int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int memory,
+ unsigned int type, unsigned int index, void *pb);
+
+int __must_check vb2_core_queue_init(struct vb2_queue *q);
+
+void vb2_core_queue_release(struct vb2_queue *q);
+void vb2_queue_error(struct vb2_queue *q);
+
+int vb2_core_qbuf(struct vb2_queue *q, unsigned int memory, unsigned int type,
+ unsigned int index, void *pb);
+int vb2_core_dqbuf(struct vb2_queue *q, unsigned int type, void *pb, bool nonblock);
+int vb2_core_expbuf(struct vb2_queue *q, unsigned int type, unsigned int index,
+ unsigned int plane, unsigned int flags);
+
+int vb2_core_streamon(struct vb2_queue *q, unsigned int type);
+int vb2_core_streamoff(struct vb2_queue *q, unsigned int type);
+
+int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma);
+#ifndef CONFIG_MMU
+unsigned long vb2_get_unmapped_area(struct vb2_queue *q,
+ unsigned long addr,
+ unsigned long len,
+ unsigned long pgoff,
+ unsigned long flags);
+#endif
+
+/*
+ * The following functions are for internal uses.
+ */
+bool __buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb);
+void __vb2_plane_dmabuf_put(struct vb2_buffer *vb, struct vb2_plane *p);
+void __vb2_buf_dmabuf_put(struct vb2_buffer *vb);
+int __verify_memory_type(struct vb2_queue *q,
+ enum v4l2_memory memory, enum v4l2_buf_type type);
+
+/**
+ * vb2_is_streaming() - return streaming status of the queue
+ * @q: videobuf queue
+ */
+static inline bool vb2_is_streaming(struct vb2_queue *q)
+{
+ return q->streaming;
+}
+
+/**
+ * vb2_fileio_is_active() - return true if fileio is active.
+ * @q: videobuf queue
+ *
+ * This returns true if read() or write() is used to stream the data
+ * as opposed to stream I/O. This is almost never an important distinction,
+ * except in rare cases. One such case is that using read() or write() to
+ * stream a format using V4L2_FIELD_ALTERNATE is not allowed since there
+ * is no way you can pass the field information of each buffer to/from
+ * userspace. A driver that supports this field format should check for
+ * this in the queue_setup op and reject it if this function returns true.
+ */
+static inline bool vb2_fileio_is_active(struct vb2_queue *q)
+{
+ return q->fileio;
+}
+
+/**
+ * vb2_is_busy() - return busy status of the queue
+ * @q: videobuf queue
+ *
+ * This function checks if queue has any buffers allocated.
+ */
+static inline bool vb2_is_busy(struct vb2_queue *q)
+{
+ return (q->num_buffers > 0);
+}
+
+/**
+ * vb2_get_drv_priv() - return driver private data associated with the queue
+ * @q: videobuf queue
+ */
+static inline void *vb2_get_drv_priv(struct vb2_queue *q)
+{
+ return q->drv_priv;
+}
+
+/**
+ * vb2_start_streaming_called() - return streaming status of driver
+ * @q: videobuf queue
+ */
+static inline bool vb2_start_streaming_called(struct vb2_queue *q)
+{
+ return q->start_streaming_called;
+}
+
+/**
+ * vb2_clear_last_buffer_dequeued() - clear last buffer dequeued flag of queue
+ * @q: videobuf queue
+ */
+static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q)
+{
+ q->last_buffer_dequeued = false;
+}
+
+#endif /* _MEDIA_VIDEOBUF2_CORE_H */
diff --git a/include/media/videobuf2-dma-contig.h b/include/media/videobuf2-dma-contig.h
index c33dfa6..8197f87 100644
--- a/include/media/videobuf2-dma-contig.h
+++ b/include/media/videobuf2-dma-contig.h
@@ -13,7 +13,7 @@
#ifndef _MEDIA_VIDEOBUF2_DMA_CONTIG_H
#define _MEDIA_VIDEOBUF2_DMA_CONTIG_H
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
#include <linux/dma-mapping.h>
static inline dma_addr_t
diff --git a/include/media/videobuf2-dma-sg.h b/include/media/videobuf2-dma-sg.h
index 8d1083f..14ce306 100644
--- a/include/media/videobuf2-dma-sg.h
+++ b/include/media/videobuf2-dma-sg.h
@@ -13,7 +13,7 @@
#ifndef _MEDIA_VIDEOBUF2_DMA_SG_H
#define _MEDIA_VIDEOBUF2_DMA_SG_H
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
static inline struct sg_table *vb2_dma_sg_plane_desc(
struct vb2_buffer *vb, unsigned int plane_no)
diff --git a/include/media/videobuf2-memops.h b/include/media/videobuf2-memops.h
index 7b6d475..f05444c 100644
--- a/include/media/videobuf2-memops.h
+++ b/include/media/videobuf2-memops.h
@@ -14,7 +14,7 @@
#ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
#define _MEDIA_VIDEOBUF2_MEMOPS_H
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
/**
* vb2_vmarea_handler - common vma refcount tracking handler
diff --git a/include/media/videobuf2-v4l2.h b/include/media/videobuf2-v4l2.h
index 76500f4..3f76e53 100644
--- a/include/media/videobuf2-v4l2.h
+++ b/include/media/videobuf2-v4l2.h
@@ -12,212 +12,11 @@
#ifndef _MEDIA_VIDEOBUF2_V4L2_H
#define _MEDIA_VIDEOBUF2_V4L2_H
-#include <linux/mm_types.h>
-#include <linux/mutex.h>
-#include <linux/poll.h>
-#include <linux/videodev2.h>
-#include <linux/dma-buf.h>
-
-struct vb2_alloc_ctx;
-struct vb2_fileio_data;
-struct vb2_threadio_data;
-
-/**
- * struct vb2_mem_ops - memory handling/memory allocator operations
- * @alloc: allocate video memory and, optionally, allocator private data,
- * return NULL on failure or a pointer to allocator private,
- * per-buffer data on success; the returned private structure
- * will then be passed as buf_priv argument to other ops in this
- * structure. Additional gfp_flags to use when allocating the
- * are also passed to this operation. These flags are from the
- * gfp_flags field of vb2_queue.
- * @put: inform the allocator that the buffer will no longer be used;
- * usually will result in the allocator freeing the buffer (if
- * no other users of this buffer are present); the buf_priv
- * argument is the allocator private per-buffer structure
- * previously returned from the alloc callback.
- * @get_userptr: acquire userspace memory for a hardware operation; used for
- * USERPTR memory types; vaddr is the address passed to the
- * videobuf layer when queuing a video buffer of USERPTR type;
- * should return an allocator private per-buffer structure
- * associated with the buffer on success, NULL on failure;
- * the returned private structure will then be passed as buf_priv
- * argument to other ops in this structure.
- * @put_userptr: inform the allocator that a USERPTR buffer will no longer
- * be used.
- * @attach_dmabuf: attach a shared struct dma_buf for a hardware operation;
- * used for DMABUF memory types; alloc_ctx is the alloc context
- * dbuf is the shared dma_buf; returns NULL on failure;
- * allocator private per-buffer structure on success;
- * this needs to be used for further accesses to the buffer.
- * @detach_dmabuf: inform the exporter of the buffer that the current DMABUF
- * buffer is no longer used; the buf_priv argument is the
- * allocator private per-buffer structure previously returned
- * from the attach_dmabuf callback.
- * @map_dmabuf: request for access to the dmabuf from allocator; the allocator
- * of dmabuf is informed that this driver is going to use the
- * dmabuf.
- * @unmap_dmabuf: releases access control to the dmabuf - allocator is notified
- * that this driver is done using the dmabuf for now.
- * @prepare: called every time the buffer is passed from userspace to the
- * driver, useful for cache synchronisation, optional.
- * @finish: called every time the buffer is passed back from the driver
- * to the userspace, also optional.
- * @vaddr: return a kernel virtual address to a given memory buffer
- * associated with the passed private structure or NULL if no
- * such mapping exists.
- * @cookie: return allocator specific cookie for a given memory buffer
- * associated with the passed private structure or NULL if not
- * available.
- * @num_users: return the current number of users of a memory buffer;
- * return 1 if the videobuf layer (or actually the driver using
- * it) is the only user.
- * @mmap: setup a userspace mapping for a given memory buffer under
- * the provided virtual memory region.
- *
- * Required ops for USERPTR types: get_userptr, put_userptr.
- * Required ops for MMAP types: alloc, put, num_users, mmap.
- * Required ops for read/write access types: alloc, put, num_users, vaddr.
- * Required ops for DMABUF types: attach_dmabuf, detach_dmabuf, map_dmabuf,
- * unmap_dmabuf.
- */
-struct vb2_mem_ops {
- void *(*alloc)(void *alloc_ctx, unsigned long size,
- enum dma_data_direction dma_dir,
- gfp_t gfp_flags);
- void (*put)(void *buf_priv);
- struct dma_buf *(*get_dmabuf)(void *buf_priv, unsigned long flags);
-
- void *(*get_userptr)(void *alloc_ctx, unsigned long vaddr,
- unsigned long size,
- enum dma_data_direction dma_dir);
- void (*put_userptr)(void *buf_priv);
-
- void (*prepare)(void *buf_priv);
- void (*finish)(void *buf_priv);
-
- void *(*attach_dmabuf)(void *alloc_ctx, struct dma_buf *dbuf,
- unsigned long size,
- enum dma_data_direction dma_dir);
- void (*detach_dmabuf)(void *buf_priv);
- int (*map_dmabuf)(void *buf_priv);
- void (*unmap_dmabuf)(void *buf_priv);
-
- void *(*vaddr)(void *buf_priv);
- void *(*cookie)(void *buf_priv);
-
- unsigned int (*num_users)(void *buf_priv);
-
- int (*mmap)(void *buf_priv, struct vm_area_struct *vma);
-};
-
-struct vb2_plane {
- void *mem_priv;
- struct dma_buf *dbuf;
- unsigned int dbuf_mapped;
-};
-
-/**
- * enum vb2_io_modes - queue access methods
- * @VB2_MMAP: driver supports MMAP with streaming API
- * @VB2_USERPTR: driver supports USERPTR with streaming API
- * @VB2_READ: driver supports read() style access
- * @VB2_WRITE: driver supports write() style access
- * @VB2_DMABUF: driver supports DMABUF with streaming API
- */
-enum vb2_io_modes {
- VB2_MMAP = (1 << 0),
- VB2_USERPTR = (1 << 1),
- VB2_READ = (1 << 2),
- VB2_WRITE = (1 << 3),
- VB2_DMABUF = (1 << 4),
-};
-
-/**
- * enum vb2_buffer_state - current video buffer state
- * @VB2_BUF_STATE_DEQUEUED: buffer under userspace control
- * @VB2_BUF_STATE_PREPARING: buffer is being prepared in videobuf
- * @VB2_BUF_STATE_PREPARED: buffer prepared in videobuf and by the driver
- * @VB2_BUF_STATE_QUEUED: buffer queued in videobuf, but not in driver
- * @VB2_BUF_STATE_ACTIVE: buffer queued in driver and possibly used
- * in a hardware operation
- * @VB2_BUF_STATE_DONE: buffer returned from driver to videobuf, but
- * not yet dequeued to userspace
- * @VB2_BUF_STATE_ERROR: same as above, but the operation on the buffer
- * has ended with an error, which will be reported
- * to the userspace when it is dequeued
- */
-enum vb2_buffer_state {
- VB2_BUF_STATE_DEQUEUED,
- VB2_BUF_STATE_PREPARING,
- VB2_BUF_STATE_PREPARED,
- VB2_BUF_STATE_QUEUED,
- VB2_BUF_STATE_ACTIVE,
- VB2_BUF_STATE_DONE,
- VB2_BUF_STATE_ERROR,
-};
-
-struct vb2_queue;
-
-/**
- * struct vb2_buffer - represents a video buffer
- * @vb2_queue: the queue to which this driver belongs
- * @num_planes: number of planes in the buffer
- * on an internal driver queue
- * @state: current buffer state; do not change
- * @queued_entry: entry on the queued buffers list, which holds all
- * buffers queued from userspace
- * @done_entry: entry on the list that stores all buffers ready to
- * be dequeued to userspace
- * @planes: private per-plane information; do not change
- */
-struct vb2_buffer {
- struct vb2_queue *vb2_queue;
-
- unsigned int num_planes;
-
-/* Private: internal use only */
- enum vb2_buffer_state state;
-
- struct list_head queued_entry;
- struct list_head done_entry;
-
- struct vb2_plane planes[VIDEO_MAX_PLANES];
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- /*
- * Counters for how often these buffer-related ops are
- * called. Used to check for unbalanced ops.
- */
- u32 cnt_mem_alloc;
- u32 cnt_mem_put;
- u32 cnt_mem_get_dmabuf;
- u32 cnt_mem_get_userptr;
- u32 cnt_mem_put_userptr;
- u32 cnt_mem_prepare;
- u32 cnt_mem_finish;
- u32 cnt_mem_attach_dmabuf;
- u32 cnt_mem_detach_dmabuf;
- u32 cnt_mem_map_dmabuf;
- u32 cnt_mem_unmap_dmabuf;
- u32 cnt_mem_vaddr;
- u32 cnt_mem_cookie;
- u32 cnt_mem_num_users;
- u32 cnt_mem_mmap;
-
- u32 cnt_buf_init;
- u32 cnt_buf_prepare;
- u32 cnt_buf_finish;
- u32 cnt_buf_cleanup;
- u32 cnt_buf_queue;
-
- /* This counts the number of calls to vb2_buffer_done() */
- u32 cnt_buf_done;
-#endif
-};
+#include <media/videobuf2-core.h>
/**
* struct vb2_v4l2_buffer - represents a video buffer for v4l2
+ * @vb2_buf: videobuf2
* @v4l2_buf: struct v4l2_buffer associated with this buffer; can
* be read by the driver and relevant entries can be
* changed by the driver in case of CAPTURE types
@@ -237,266 +36,34 @@ struct vb2_v4l2_buffer {
};
/**
- * struct vb2_ops - driver-specific callbacks
- *
- * @queue_setup: called from VIDIOC_REQBUFS and VIDIOC_CREATE_BUFS
- * handlers before memory allocation, or, if
- * *num_planes != 0, after the allocation to verify a
- * smaller number of buffers. Driver should return
- * the required number of buffers in *num_buffers, the
- * required number of planes per buffer in *num_planes; the
- * size of each plane should be set in the sizes[] array
- * and optional per-plane allocator specific context in the
- * alloc_ctxs[] array. When called from VIDIOC_REQBUFS,
- * fmt == NULL, the driver has to use the currently
- * configured format and *num_buffers is the total number
- * of buffers, that are being allocated. When called from
- * VIDIOC_CREATE_BUFS, fmt != NULL and it describes the
- * target frame format (if the format isn't valid the
- * callback must return -EINVAL). In this case *num_buffers
- * are being allocated additionally to q->num_buffers.
- * @wait_prepare: release any locks taken while calling vb2 functions;
- * it is called before an ioctl needs to wait for a new
- * buffer to arrive; required to avoid a deadlock in
- * blocking access type.
- * @wait_finish: reacquire all locks released in the previous callback;
- * required to continue operation after sleeping while
- * waiting for a new buffer to arrive.
- * @buf_init: called once after allocating a buffer (in MMAP case)
- * or after acquiring a new USERPTR buffer; drivers may
- * perform additional buffer-related initialization;
- * initialization failure (return != 0) will prevent
- * queue setup from completing successfully; optional.
- * @buf_prepare: called every time the buffer is queued from userspace
- * and from the VIDIOC_PREPARE_BUF ioctl; drivers may
- * perform any initialization required before each
- * hardware operation in this callback; drivers can
- * access/modify the buffer here as it is still synced for
- * the CPU; drivers that support VIDIOC_CREATE_BUFS must
- * also validate the buffer size; if an error is returned,
- * the buffer will not be queued in driver; optional.
- * @buf_finish: called before every dequeue of the buffer back to
- * userspace; the buffer is synced for the CPU, so drivers
- * can access/modify the buffer contents; drivers may
- * perform any operations required before userspace
- * accesses the buffer; optional. The buffer state can be
- * one of the following: DONE and ERROR occur while
- * streaming is in progress, and the PREPARED state occurs
- * when the queue has been canceled and all pending
- * buffers are being returned to their default DEQUEUED
- * state. Typically you only have to do something if the
- * state is VB2_BUF_STATE_DONE, since in all other cases
- * the buffer contents will be ignored anyway.
- * @buf_cleanup: called once before the buffer is freed; drivers may
- * perform any additional cleanup; optional.
- * @start_streaming: called once to enter 'streaming' state; the driver may
- * receive buffers with @buf_queue callback before
- * @start_streaming is called; the driver gets the number
- * of already queued buffers in count parameter; driver
- * can return an error if hardware fails, in that case all
- * buffers that have been already given by the @buf_queue
- * callback are to be returned by the driver by calling
- * @vb2_buffer_done(VB2_BUF_STATE_QUEUED).
- * If you need a minimum number of buffers before you can
- * start streaming, then set @min_buffers_needed in the
- * vb2_queue structure. If that is non-zero then
- * start_streaming won't be called until at least that
- * many buffers have been queued up by userspace.
- * @stop_streaming: called when 'streaming' state must be disabled; driver
- * should stop any DMA transactions or wait until they
- * finish and give back all buffers it got from buf_queue()
- * callback by calling @vb2_buffer_done() with either
- * VB2_BUF_STATE_DONE or VB2_BUF_STATE_ERROR; may use
- * vb2_wait_for_all_buffers() function
- * @buf_queue: passes buffer vb to the driver; driver may start
- * hardware operation on this buffer; driver should give
- * the buffer back by calling vb2_buffer_done() function;
- * it is allways called after calling STREAMON ioctl;
- * might be called before start_streaming callback if user
- * pre-queued buffers before calling STREAMON.
- */
-struct vb2_ops {
- int (*queue_setup)(struct vb2_queue *q, const struct v4l2_format *fmt,
- unsigned int *num_buffers, unsigned int *num_planes,
- unsigned int sizes[], void *alloc_ctxs[]);
-
- void (*wait_prepare)(struct vb2_queue *q);
- void (*wait_finish)(struct vb2_queue *q);
-
- int (*buf_init)(struct vb2_buffer *vb);
- int (*buf_prepare)(struct vb2_buffer *vb);
- void (*buf_finish)(struct vb2_buffer *vb);
- void (*buf_cleanup)(struct vb2_buffer *vb);
-
- int (*start_streaming)(struct vb2_queue *q, unsigned int count);
- void (*stop_streaming)(struct vb2_queue *q);
-
- void (*buf_queue)(struct vb2_buffer *vb);
-};
-
-struct v4l2_fh;
-
-/**
- * struct vb2_queue - a videobuf queue
- *
- * @type: queue type (see V4L2_BUF_TYPE_* in linux/videodev2.h
- * @io_modes: supported io methods (see vb2_io_modes enum)
- * @fileio_read_once: report EOF after reading the first buffer
- * @fileio_write_immediately: queue buffer after each write() call
- * @allow_zero_bytesused: allow bytesused == 0 to be passed to the driver
- * @lock: pointer to a mutex that protects the vb2_queue struct. The
- * driver can set this to a mutex to let the vb2 core serialize
- * the queuing ioctls. If the driver wants to handle locking
- * itself, then this should be set to NULL. This lock is not used
- * by the videobuf2 core API.
- * @owner: The filehandle that 'owns' the buffers, i.e. the filehandle
- * that called reqbufs, create_buffers or started fileio.
- * This field is not used by the videobuf2 core API, but it allows
- * drivers to easily associate an owner filehandle with the queue.
- * @ops: driver-specific callbacks
- * @mem_ops: memory allocator specific callbacks
- * @drv_priv: driver private data
- * @buf_struct_size: size of the driver-specific buffer structure;
- * "0" indicates the driver doesn't want to use a custom buffer
- * structure type, so sizeof(struct vb2_v4l2_buffer) will is used
- * @timestamp_flags: Timestamp flags; V4L2_BUF_FLAG_TIMESTAMP_* and
- * V4L2_BUF_FLAG_TSTAMP_SRC_*
- * @gfp_flags: additional gfp flags used when allocating the buffers.
- * Typically this is 0, but it may be e.g. GFP_DMA or __GFP_DMA32
- * to force the buffer allocation to a specific memory zone.
- * @min_buffers_needed: the minimum number of buffers needed before
- * start_streaming() can be called. Used when a DMA engine
- * cannot be started unless at least this number of buffers
- * have been queued into the driver.
- *
- * @mmap_lock: private mutex used when buffers are allocated/freed/mmapped
- * @memory: current memory type used
- * @bufs: videobuf buffer structures
- * @num_buffers: number of allocated/used buffers
- * @queued_list: list of buffers currently queued from userspace
- * @queued_count: number of buffers queued and ready for streaming.
- * @owned_by_drv_count: number of buffers owned by the driver
- * @done_list: list of buffers ready to be dequeued to userspace
- * @done_lock: lock to protect done_list list
- * @done_wq: waitqueue for processes waiting for buffers ready to be dequeued
- * @alloc_ctx: memory type/allocator-specific contexts for each plane
- * @streaming: current streaming state
- * @start_streaming_called: start_streaming() was called successfully and we
- * started streaming.
- * @error: a fatal error occurred on the queue
- * @waiting_for_buffers: used in poll() to check if vb2 is still waiting for
- * buffers. Only set for capture queues if qbuf has not yet been
- * called since poll() needs to return POLLERR in that situation.
- * @last_buffer_dequeued: used in poll() and DQBUF to immediately return if the
- * last decoded buffer was already dequeued. Set for capture queues
- * when a buffer with the V4L2_BUF_FLAG_LAST is dequeued.
- * @fileio: file io emulator internal data, used only if emulator is active
- * @threadio: thread io internal data, used only if thread is active
- */
-struct vb2_queue {
- enum v4l2_buf_type type;
- unsigned int io_modes;
- unsigned fileio_read_once:1;
- unsigned fileio_write_immediately:1;
- unsigned allow_zero_bytesused:1;
-
- struct mutex *lock;
- struct v4l2_fh *owner;
-
- const struct vb2_ops *ops;
- const struct vb2_mem_ops *mem_ops;
- void *drv_priv;
- unsigned int buf_struct_size;
- u32 timestamp_flags;
- gfp_t gfp_flags;
- u32 min_buffers_needed;
-
-/* private: internal use only */
- struct mutex mmap_lock;
- enum v4l2_memory memory;
- struct vb2_buffer *bufs[VIDEO_MAX_FRAME];
- unsigned int num_buffers;
-
- struct list_head queued_list;
- unsigned int queued_count;
-
- atomic_t owned_by_drv_count;
- struct list_head done_list;
- spinlock_t done_lock;
- wait_queue_head_t done_wq;
-
- void *alloc_ctx[VIDEO_MAX_PLANES];
- unsigned int plane_sizes[VIDEO_MAX_PLANES];
-
- unsigned int streaming:1;
- unsigned int start_streaming_called:1;
- unsigned int error:1;
- unsigned int waiting_for_buffers:1;
- unsigned int last_buffer_dequeued:1;
-
- struct vb2_fileio_data *fileio;
- struct vb2_threadio_data *threadio;
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- /*
- * Counters for how often these queue-related ops are
- * called. Used to check for unbalanced ops.
- */
- u32 cnt_queue_setup;
- u32 cnt_wait_prepare;
- u32 cnt_wait_finish;
- u32 cnt_start_streaming;
- u32 cnt_stop_streaming;
-#endif
-};
-
-/**
* to_vb2_v4l2_buffer() - cast to struct vb2_v4l2_buffer *
* @vb: struct vb2_buffer *vb
*/
#define to_vb2_v4l2_buffer(vb) \
(container_of(vb, struct vb2_v4l2_buffer, vb2_buf))
-#define vb2_v4l2_index(vb) \
+#define vb2_v4l2_index(vb) \
({ \
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); \
- int ret = vbuf->v4l2_buf.index; \
+ unsigned int ret = vbuf->v4l2_buf.index; \
ret; \
})
-void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no);
-void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no);
-
-void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state);
-void vb2_discard_done(struct vb2_queue *q);
-int vb2_wait_for_all_buffers(struct vb2_queue *q);
-
int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b);
int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req);
-int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create);
+int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *cb);
int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b);
int __must_check vb2_queue_init(struct vb2_queue *q);
-
void vb2_queue_release(struct vb2_queue *q);
-void vb2_queue_error(struct vb2_queue *q);
-
int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b);
+int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblock);
int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb);
-int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking);
int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type);
int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type);
-int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma);
-#ifndef CONFIG_MMU
-unsigned long vb2_get_unmapped_area(struct vb2_queue *q,
- unsigned long addr,
- unsigned long len,
- unsigned long pgoff,
- unsigned long flags);
-#endif
unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait);
size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count,
loff_t *ppos, int nonblock);
@@ -533,52 +100,6 @@ int vb2_thread_start(struct vb2_queue *q, vb2_thread_fnc fnc, void *priv,
int vb2_thread_stop(struct vb2_queue *q);
/**
- * vb2_is_streaming() - return streaming status of the queue
- * @q: videobuf queue
- */
-static inline bool vb2_is_streaming(struct vb2_queue *q)
-{
- return q->streaming;
-}
-
-/**
- * vb2_fileio_is_active() - return true if fileio is active.
- * @q: videobuf queue
- *
- * This returns true if read() or write() is used to stream the data
- * as opposed to stream I/O. This is almost never an important distinction,
- * except in rare cases. One such case is that using read() or write() to
- * stream a format using V4L2_FIELD_ALTERNATE is not allowed since there
- * is no way you can pass the field information of each buffer to/from
- * userspace. A driver that supports this field format should check for
- * this in the queue_setup op and reject it if this function returns true.
- */
-static inline bool vb2_fileio_is_active(struct vb2_queue *q)
-{
- return q->fileio;
-}
-
-/**
- * vb2_is_busy() - return busy status of the queue
- * @q: videobuf queue
- *
- * This function checks if queue has any buffers allocated.
- */
-static inline bool vb2_is_busy(struct vb2_queue *q)
-{
- return (q->num_buffers > 0);
-}
-
-/**
- * vb2_get_drv_priv() - return driver private data associated with the queue
- * @q: videobuf queue
- */
-static inline void *vb2_get_drv_priv(struct vb2_queue *q)
-{
- return q->drv_priv;
-}
-
-/**
* vb2_set_plane_payload() - set bytesused for the plane plane_no
* @vb: buffer for which plane payload should be set
* @plane_no: plane number for which payload should be set
@@ -624,24 +145,6 @@ vb2_plane_size(struct vb2_buffer *vb, unsigned int plane_no)
return 0;
}
-/**
- * vb2_start_streaming_called() - return streaming status of driver
- * @q: videobuf queue
- */
-static inline bool vb2_start_streaming_called(struct vb2_queue *q)
-{
- return q->start_streaming_called;
-}
-
-/**
- * vb2_clear_last_buffer_dequeued() - clear last buffer dequeued flag of queue
- * @q: videobuf queue
- */
-static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q)
-{
- q->last_buffer_dequeued = false;
-}
-
/*
* The following functions are not part of the vb2 core API, but are simple
* helper functions that you can use in your struct v4l2_file_operations,
diff --git a/include/media/videobuf2-vmalloc.h b/include/media/videobuf2-vmalloc.h
index a63fe66..93a76b4 100644
--- a/include/media/videobuf2-vmalloc.h
+++ b/include/media/videobuf2-vmalloc.h
@@ -13,7 +13,7 @@
#ifndef _MEDIA_VIDEOBUF2_VMALLOC_H
#define _MEDIA_VIDEOBUF2_VMALLOC_H
-#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-core.h>
extern const struct vb2_mem_ops vb2_vmalloc_memops;
diff --git a/include/trace/events/v4l2.h b/include/trace/events/v4l2.h
index dabd780..0ae549f 100644
--- a/include/trace/events/v4l2.h
+++ b/include/trace/events/v4l2.h
@@ -203,7 +203,8 @@ DECLARE_EVENT_CLASS(vb2_event_class,
TP_fast_assign(
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- __entry->minor = q->owner ? q->owner->vdev->minor : -1;
+ struct v4l2_fh *owner = (struct v4l2_fh *)q->owner;
+ __entry->minor = owner ? owner->vdev->minor : -1;
__entry->queued_count = q->queued_count;
__entry->owned_by_drv_count =
atomic_read(&q->owned_by_drv_count);
--
1.7.9.5
--
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