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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 12:05:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 12:05:15 -0800
commitb0378657549bbc73ac0ec6e9332fcf3c53362365 (patch)
tree61aecdd60c34f06085a29fc6cbb0b4209484585e /drivers/media/v4l2-core
parent66339fdacb63fc7908e7eb755b9fffa672ffbb10 (diff)
parent79f5b6ae960d380c829fb67d5dadcd1d025d2775 (diff)
Merge tag 'media/v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab: "Media updates, including: - Lots of improvements at the kABI documentation - Split of Videobuf2 into a common part and a V4L2 specific one - Split of the VB2 tracing events into a separate header file - s5p-mfc got support for Exynos 5433 - v4l2 fixes for 64-bits alignment when running 32 bits userspace on ARM - Added support for SDR radio transmitter at core, vivid and hackrf drivers - Some y2038 fixups - Some improvements at V4L2 colorspace support - saa7164 converted to use the V4L2 core control framework - several new boards additions, cleanups and fixups PS: There are two patches for scripts/kernel-doc that are needed by the documentation patches on Media. Jon is OK on merging those via my tree" * tag 'media/v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (146 commits) [media] c8sectpfe: Remove select on CONFIG_FW_LOADER_USER_HELPER_FALLBACK [media] DocBook media: update copyright/version numbers [media] ivtv: Convert to get_user_pages_unlocked() [media] media/v4l2-ctrls: fix setting autocluster to manual with VIDIOC_S_CTRL [media] DocBook media: Fix a typo in encoder cmd [media] DocBook: add SDR specific info to G_MODULATOR / S_MODULATOR [media] DocBook: add SDR specific info to G_TUNER / S_TUNER [media] hackrf: do not set human readable name for formats [media] hackrf: add support for transmitter [media] hackrf: switch to single function which configures everything [media] hackrf: add control for RF amplifier [media] DocBook: add modulator type field [media] v4l: add type field to v4l2_modulator struct [media] DocBook: document SDR transmitter [media] v4l2: add support for SDR transmitter [media] DocBook: document tuner RF gain control [media] v4l2: add RF gain control [media] v4l2: rename V4L2_TUNER_ADC to V4L2_TUNER_SDR [media] media/vivid-osd: fix info leak in ioctl [media] media: videobuf2: Move v4l2-specific stuff to videobuf2-v4l2 ...
Diffstat (limited to 'drivers/media/v4l2-core')
-rw-r--r--drivers/media/v4l2-core/Makefile4
-rw-r--r--drivers/media/v4l2-core/v4l2-compat-ioctl32.c51
-rw-r--r--drivers/media/v4l2-core/v4l2-ctrls.c14
-rw-r--r--drivers/media/v4l2-core/v4l2-dev.c14
-rw-r--r--drivers/media/v4l2-core/v4l2-ioctl.c51
-rw-r--r--drivers/media/v4l2-core/v4l2-mem2mem.c33
-rw-r--r--drivers/media/v4l2-core/v4l2-trace.c10
-rw-r--r--drivers/media/v4l2-core/vb2-trace.c9
-rw-r--r--drivers/media/v4l2-core/videobuf-core.c4
-rw-r--r--drivers/media/v4l2-core/videobuf2-core.c2014
-rw-r--r--drivers/media/v4l2-core/videobuf2-dma-contig.c7
-rw-r--r--drivers/media/v4l2-core/videobuf2-dma-sg.c7
-rw-r--r--drivers/media/v4l2-core/videobuf2-internal.h161
-rw-r--r--drivers/media/v4l2-core/videobuf2-memops.c2
-rw-r--r--drivers/media/v4l2-core/videobuf2-v4l2.c1661
-rw-r--r--drivers/media/v4l2-core/videobuf2-vmalloc.c2
16 files changed, 2226 insertions, 1818 deletions
diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile
index d1dd440d9d9b..1dc8bba2b198 100644
--- a/drivers/media/v4l2-core/Makefile
+++ b/drivers/media/v4l2-core/Makefile
@@ -14,7 +14,7 @@ ifeq ($(CONFIG_OF),y)
videodev-objs += v4l2-of.o
endif
ifeq ($(CONFIG_TRACEPOINTS),y)
- videodev-objs += v4l2-trace.o
+ videodev-objs += vb2-trace.o v4l2-trace.o
endif
obj-$(CONFIG_VIDEO_V4L2) += videodev.o
@@ -33,7 +33,7 @@ obj-$(CONFIG_VIDEOBUF_DMA_CONTIG) += videobuf-dma-contig.o
obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o
obj-$(CONFIG_VIDEOBUF_DVB) += videobuf-dvb.o
-obj-$(CONFIG_VIDEOBUF2_CORE) += videobuf2-core.o
+obj-$(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/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index af635430524e..327e83ac2469 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -147,6 +147,20 @@ static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp,
return 0;
}
+static inline int get_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up)
+{
+ if (copy_from_user(kp, up, sizeof(struct v4l2_sdr_format)))
+ return -EFAULT;
+ return 0;
+}
+
+static inline int put_v4l2_sdr_format(struct v4l2_sdr_format *kp, struct v4l2_sdr_format __user *up)
+{
+ if (copy_to_user(up, kp, sizeof(struct v4l2_sdr_format)))
+ return -EFAULT;
+ return 0;
+}
+
struct v4l2_format32 {
__u32 type; /* enum v4l2_buf_type */
union {
@@ -155,6 +169,7 @@ struct v4l2_format32 {
struct v4l2_window32 win;
struct v4l2_vbi_format vbi;
struct v4l2_sliced_vbi_format sliced;
+ struct v4l2_sdr_format sdr;
__u8 raw_data[200]; /* user-defined */
} fmt;
};
@@ -198,8 +213,11 @@ static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+ case V4L2_BUF_TYPE_SDR_CAPTURE:
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
+ return get_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr);
default:
- printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
+ pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
kp->type);
return -EINVAL;
}
@@ -242,8 +260,11 @@ static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+ case V4L2_BUF_TYPE_SDR_CAPTURE:
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
+ return put_v4l2_sdr_format(&kp->fmt.sdr, &up->fmt.sdr);
default:
- printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
+ pr_info("compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
kp->type);
return -EINVAL;
}
@@ -266,7 +287,7 @@ static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_
struct v4l2_standard32 {
__u32 index;
- __u32 id[2]; /* __u64 would get the alignment wrong */
+ compat_u64 id;
__u8 name[24];
struct v4l2_fract frameperiod; /* Frames, not fields */
__u32 framelines;
@@ -286,7 +307,7 @@ static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32
{
if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
put_user(kp->index, &up->index) ||
- copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
+ put_user(kp->id, &up->id) ||
copy_to_user(up->name, kp->name, 24) ||
copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
put_user(kp->framelines, &up->framelines) ||
@@ -587,10 +608,10 @@ struct v4l2_input32 {
__u32 type; /* Type of input */
__u32 audioset; /* Associated audios (bitfield) */
__u32 tuner; /* Associated tuner */
- v4l2_std_id std;
+ compat_u64 std;
__u32 status;
__u32 reserved[4];
-} __attribute__ ((packed));
+};
/* The 64-bit v4l2_input struct has extra padding at the end of the struct.
Otherwise it is identical to the 32-bit version. */
@@ -609,11 +630,11 @@ static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __
}
struct v4l2_ext_controls32 {
- __u32 ctrl_class;
- __u32 count;
- __u32 error_idx;
- __u32 reserved[2];
- compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
+ __u32 ctrl_class;
+ __u32 count;
+ __u32 error_idx;
+ __u32 reserved[2];
+ compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
};
struct v4l2_ext_control32 {
@@ -655,7 +676,8 @@ static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
get_user(kp->ctrl_class, &up->ctrl_class) ||
get_user(kp->count, &up->count) ||
get_user(kp->error_idx, &up->error_idx) ||
- copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+ copy_from_user(kp->reserved, up->reserved,
+ sizeof(kp->reserved)))
return -EFAULT;
n = kp->count;
if (n == 0) {
@@ -738,6 +760,7 @@ static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
struct v4l2_event32 {
__u32 type;
union {
+ compat_s64 value64;
__u8 data[64];
} u;
__u32 pending;
@@ -1033,8 +1056,8 @@ long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
ret = vdev->fops->compat_ioctl32(file, cmd, arg);
if (ret == -ENOIOCTLCMD)
- pr_warn("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
- _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
+ pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
+ _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index b6b7dcc1b77d..4a1d9fdd14bb 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -888,6 +888,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
+ case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
@@ -1161,6 +1162,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_PILOT_TONE_FREQUENCY:
case V4L2_CID_TUNE_POWER_LEVEL:
case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
+ case V4L2_CID_RF_TUNER_RF_GAIN:
case V4L2_CID_RF_TUNER_LNA_GAIN:
case V4L2_CID_RF_TUNER_MIXER_GAIN:
case V4L2_CID_RF_TUNER_IF_GAIN:
@@ -2498,7 +2500,7 @@ int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctr
/* We found a control with the given ID, so just get
the next valid one in the list. */
list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
- is_compound =
+ is_compound = ref->ctrl->is_array ||
ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
if (id < ref->ctrl->id &&
(is_compound & mask) == match)
@@ -2512,7 +2514,7 @@ int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctr
is one, otherwise the first 'if' above would have
been true. */
list_for_each_entry(ref, &hdl->ctrl_refs, node) {
- is_compound =
+ is_compound = ref->ctrl->is_array ||
ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
if (id < ref->ctrl->id &&
(is_compound & mask) == match)
@@ -2884,7 +2886,7 @@ static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
* cur_to_user() calls below would need to be modified not to access
* userspace memory when called from get_ctrl().
*/
- if (!ctrl->is_int)
+ if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
return -EINVAL;
if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
@@ -2942,9 +2944,9 @@ s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
/* It's a driver bug if this happens. */
WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
- c.value = 0;
+ c.value64 = 0;
get_ctrl(ctrl, &c);
- return c.value;
+ return c.value64;
}
EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
@@ -3043,7 +3045,7 @@ static void update_from_auto_cluster(struct v4l2_ctrl *master)
{
int i;
- for (i = 0; i < master->ncontrols; i++)
+ for (i = 1; i < master->ncontrols; i++)
cur_to_new(master->cluster[i]);
if (!call_op(master, g_volatile_ctrl))
for (i = 1; i < master->ncontrols; i++)
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index 71a1b93b0790..6b1eaeddbdb3 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -637,8 +637,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
ops->vidioc_try_fmt_sliced_vbi_out)))
set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
SET_VALID_IOCTL(ops, VIDIOC_G_SLICED_VBI_CAP, vidioc_g_sliced_vbi_cap);
- } else if (is_sdr) {
- /* SDR specific ioctls */
+ } else if (is_sdr && is_rx) {
+ /* SDR receiver specific ioctls */
if (ops->vidioc_enum_fmt_sdr_cap)
set_bit(_IOC_NR(VIDIOC_ENUM_FMT), valid_ioctls);
if (ops->vidioc_g_fmt_sdr_cap)
@@ -647,6 +647,16 @@ static void determine_valid_ioctls(struct video_device *vdev)
set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
if (ops->vidioc_try_fmt_sdr_cap)
set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
+ } else if (is_sdr && is_tx) {
+ /* SDR transmitter specific ioctls */
+ if (ops->vidioc_enum_fmt_sdr_out)
+ set_bit(_IOC_NR(VIDIOC_ENUM_FMT), valid_ioctls);
+ if (ops->vidioc_g_fmt_sdr_out)
+ set_bit(_IOC_NR(VIDIOC_G_FMT), valid_ioctls);
+ if (ops->vidioc_s_fmt_sdr_out)
+ set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
+ if (ops->vidioc_try_fmt_sdr_out)
+ set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
}
if (is_vid || is_vbi || is_sdr) {
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 4a384fc765b8..7486af2c8ae4 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -26,7 +26,7 @@
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-device.h>
-#include <media/videobuf2-core.h>
+#include <media/videobuf2-v4l2.h>
#include <trace/events/v4l2.h>
@@ -153,6 +153,7 @@ const char *v4l2_type_names[] = {
[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
[V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
+ [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
};
EXPORT_SYMBOL(v4l2_type_names);
@@ -326,6 +327,7 @@ static void v4l_print_format(const void *arg, bool write_only)
sliced->service_lines[1][i]);
break;
case V4L2_BUF_TYPE_SDR_CAPTURE:
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
sdr = &p->fmt.sdr;
pr_cont(", pixelformat=%c%c%c%c\n",
(sdr->pixelformat >> 0) & 0xff,
@@ -974,6 +976,10 @@ static int check_fmt(struct file *file, enum v4l2_buf_type type)
if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
return 0;
break;
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
+ if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
+ return 0;
+ break;
default:
break;
}
@@ -1324,6 +1330,11 @@ static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
break;
ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
break;
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
+ if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
+ break;
+ ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
+ break;
}
if (ret == 0)
v4l_fill_fmtdesc(p);
@@ -1418,6 +1429,10 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
break;
return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
+ if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
+ break;
+ return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
}
return -EINVAL;
}
@@ -1497,6 +1512,11 @@ static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
break;
CLEAR_AFTER_FIELD(p, fmt.sdr);
return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
+ if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
+ break;
+ CLEAR_AFTER_FIELD(p, fmt.sdr);
+ return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
}
return -EINVAL;
}
@@ -1576,6 +1596,11 @@ static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
break;
CLEAR_AFTER_FIELD(p, fmt.sdr);
return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
+ if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
+ break;
+ CLEAR_AFTER_FIELD(p, fmt.sdr);
+ return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
}
return -EINVAL;
}
@@ -1621,15 +1646,31 @@ static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
+ struct video_device *vfd = video_devdata(file);
struct v4l2_modulator *p = arg;
int err;
+ if (vfd->vfl_type == VFL_TYPE_RADIO)
+ p->type = V4L2_TUNER_RADIO;
+
err = ops->vidioc_g_modulator(file, fh, p);
if (!err)
p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
return err;
}
+static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
+ struct file *file, void *fh, void *arg)
+{
+ struct video_device *vfd = video_devdata(file);
+ struct v4l2_modulator *p = arg;
+
+ if (vfd->vfl_type == VFL_TYPE_RADIO)
+ p->type = V4L2_TUNER_RADIO;
+
+ return ops->vidioc_s_modulator(file, fh, p);
+}
+
static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
@@ -1637,7 +1678,7 @@ static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
struct v4l2_frequency *p = arg;
if (vfd->vfl_type == VFL_TYPE_SDR)
- p->type = V4L2_TUNER_ADC;
+ p->type = V4L2_TUNER_SDR;
else
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
@@ -1652,7 +1693,7 @@ static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
enum v4l2_tuner_type type;
if (vfd->vfl_type == VFL_TYPE_SDR) {
- if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
+ if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
return -EINVAL;
} else {
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
@@ -2277,7 +2318,7 @@ static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
int err;
if (vfd->vfl_type == VFL_TYPE_SDR) {
- if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
+ if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
return -EINVAL;
type = p->type;
} else {
@@ -2416,7 +2457,7 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
- IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
+ IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index ec3ad4eb0c57..61d56c940f80 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -17,7 +17,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
-#include <media/videobuf2-core.h>
+#include <media/videobuf2-v4l2.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
@@ -583,32 +583,25 @@ unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
goto end;
}
- if (m2m_ctx->m2m_dev->m2m_ops->unlock)
- m2m_ctx->m2m_dev->m2m_ops->unlock(m2m_ctx->priv);
- else if (m2m_ctx->q_lock)
- mutex_unlock(m2m_ctx->q_lock);
-
+ spin_lock_irqsave(&src_q->done_lock, flags);
if (list_empty(&src_q->done_list))
poll_wait(file, &src_q->done_wq, wait);
+ spin_unlock_irqrestore(&src_q->done_lock, flags);
+
+ spin_lock_irqsave(&dst_q->done_lock, flags);
if (list_empty(&dst_q->done_list)) {
/*
* If the last buffer was dequeued from the capture queue,
* return immediately. DQBUF will return -EPIPE.
*/
- if (dst_q->last_buffer_dequeued)
+ if (dst_q->last_buffer_dequeued) {
+ spin_unlock_irqrestore(&dst_q->done_lock, flags);
return rc | POLLIN | POLLRDNORM;
+ }
poll_wait(file, &dst_q->done_wq, wait);
}
-
- if (m2m_ctx->m2m_dev->m2m_ops->lock)
- m2m_ctx->m2m_dev->m2m_ops->lock(m2m_ctx->priv);
- else if (m2m_ctx->q_lock) {
- if (mutex_lock_interruptible(m2m_ctx->q_lock)) {
- rc |= POLLERR;
- goto end;
- }
- }
+ spin_unlock_irqrestore(&dst_q->done_lock, flags);
spin_lock_irqsave(&src_q->done_lock, flags);
if (!list_empty(&src_q->done_list))
@@ -773,13 +766,15 @@ EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_release);
*
* Call from buf_queue(), videobuf_queue_ops callback.
*/
-void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_buffer *vb)
+void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx,
+ struct vb2_v4l2_buffer *vbuf)
{
- struct v4l2_m2m_buffer *b = container_of(vb, struct v4l2_m2m_buffer, vb);
+ struct v4l2_m2m_buffer *b = container_of(vbuf,
+ struct v4l2_m2m_buffer, vb);
struct v4l2_m2m_queue_ctx *q_ctx;
unsigned long flags;
- q_ctx = get_queue_ctx(m2m_ctx, vb->vb2_queue->type);
+ q_ctx = get_queue_ctx(m2m_ctx, vbuf->vb2_buf.vb2_queue->type);
if (!q_ctx)
return;
diff --git a/drivers/media/v4l2-core/v4l2-trace.c b/drivers/media/v4l2-core/v4l2-trace.c
index ae10b0248c8e..7416010542c1 100644
--- a/drivers/media/v4l2-core/v4l2-trace.c
+++ b/drivers/media/v4l2-core/v4l2-trace.c
@@ -1,11 +1,11 @@
#include <media/v4l2-common.h>
#include <media/v4l2-fh.h>
-#include <media/videobuf2-core.h>
+#include <media/videobuf2-v4l2.h>
#define CREATE_TRACE_POINTS
#include <trace/events/v4l2.h>
-EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_buf_done);
-EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_buf_queue);
-EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_dqbuf);
-EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_qbuf);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_buf_done);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_buf_queue);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_dqbuf);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_v4l2_qbuf);
diff --git a/drivers/media/v4l2-core/vb2-trace.c b/drivers/media/v4l2-core/vb2-trace.c
new file mode 100644
index 000000000000..61e74f5936b3
--- /dev/null
+++ b/drivers/media/v4l2-core/vb2-trace.c
@@ -0,0 +1,9 @@
+#include <media/videobuf2-core.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/vb2.h>
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_buf_done);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_buf_queue);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_dqbuf);
+EXPORT_TRACEPOINT_SYMBOL_GPL(vb2_qbuf);
diff --git a/drivers/media/v4l2-core/videobuf-core.c b/drivers/media/v4l2-core/videobuf-core.c
index 926836d1813a..6c02989ee33f 100644
--- a/drivers/media/v4l2-core/videobuf-core.c
+++ b/drivers/media/v4l2-core/videobuf-core.c
@@ -576,7 +576,8 @@ int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b)
}
if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT
|| q->type == V4L2_BUF_TYPE_VBI_OUTPUT
- || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
+ || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT
+ || q->type == V4L2_BUF_TYPE_SDR_OUTPUT) {
buf->size = b->bytesused;
buf->field = b->field;
buf->ts = b->timestamp;
@@ -1154,6 +1155,7 @@ unsigned int videobuf_poll_stream(struct file *file,
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
case V4L2_BUF_TYPE_VBI_OUTPUT:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
+ case V4L2_BUF_TYPE_SDR_OUTPUT:
rc = POLLOUT | POLLWRNORM;
break;
default:
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 4f59b7ec05d0..33bdd81065e8 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -1,5 +1,5 @@
/*
- * videobuf2-core.c - V4L2 driver helper framework
+ * videobuf2-core.c - video buffer 2 core framework
*
* Copyright (C) 2010 Samsung Electronics
*
@@ -24,164 +24,15 @@
#include <linux/freezer.h>
#include <linux/kthread.h>
-#include <media/v4l2-dev.h>
-#include <media/v4l2-fh.h>
-#include <media/v4l2-event.h>
-#include <media/v4l2-common.h>
#include <media/videobuf2-core.h>
-#include <trace/events/v4l2.h>
+#include <trace/events/vb2.h>
-static int debug;
-module_param(debug, int, 0644);
+#include "videobuf2-internal.h"
-#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, (vb)->v4l2_buf.index, #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, (vb)->v4l2_buf.index, #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 | \
- V4L2_BUF_FLAG_PREPARED | \
- V4L2_BUF_FLAG_TIMESTAMP_MASK)
-/* Output buffer flags that should be passed on to the driver */
-#define V4L2_BUFFER_OUT_FLAGS (V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_BFRAME | \
- V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_TIMECODE)
+int vb2_debug;
+EXPORT_SYMBOL_GPL(vb2_debug);
+module_param_named(debug, vb2_debug, int, 0644);
static void __vb2_queue_cancel(struct vb2_queue *q);
static void __enqueue_in_driver(struct vb2_buffer *vb);
@@ -193,7 +44,7 @@ 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;
+ q->is_output ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
void *mem_priv;
int plane;
@@ -211,7 +62,7 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
/* Associate allocator private data with this plane */
vb->planes[plane].mem_priv = mem_priv;
- vb->v4l2_planes[plane].length = q->plane_sizes[plane];
+ vb->planes[plane].length = q->plane_sizes[plane];
}
return 0;
@@ -235,8 +86,7 @@ static void __vb2_buf_mem_free(struct vb2_buffer *vb)
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,
- vb->v4l2_buf.index);
+ dprintk(3, "freed plane %d of buffer %d\n", plane, vb->index);
}
}
@@ -269,7 +119,9 @@ static void __vb2_plane_dmabuf_put(struct vb2_buffer *vb, struct vb2_plane *p)
call_void_memop(vb, detach_dmabuf, p->mem_priv);
dma_buf_put(p->dbuf);
- memset(p, 0, sizeof(*p));
+ p->mem_priv = NULL;
+ p->dbuf = NULL;
+ p->dbuf_mapped = 0;
}
/**
@@ -299,7 +151,7 @@ static void __setup_lengths(struct vb2_queue *q, unsigned int n)
continue;
for (plane = 0; plane < vb->num_planes; ++plane)
- vb->v4l2_planes[plane].length = q->plane_sizes[plane];
+ vb->planes[plane].length = q->plane_sizes[plane];
}
}
@@ -314,10 +166,10 @@ static void __setup_offsets(struct vb2_queue *q, unsigned int n)
unsigned long off;
if (q->num_buffers) {
- struct v4l2_plane *p;
+ struct vb2_plane *p;
vb = q->bufs[q->num_buffers - 1];
- p = &vb->v4l2_planes[vb->num_planes - 1];
- off = PAGE_ALIGN(p->m.mem_offset + p->length);
+ p = &vb->planes[vb->num_planes - 1];
+ off = PAGE_ALIGN(p->m.offset + p->length);
} else {
off = 0;
}
@@ -328,12 +180,12 @@ static void __setup_offsets(struct vb2_queue *q, unsigned int n)
continue;
for (plane = 0; plane < vb->num_planes; ++plane) {
- vb->v4l2_planes[plane].m.mem_offset = off;
+ vb->planes[plane].m.offset = off;
dprintk(3, "buffer %d, plane %d offset 0x%08lx\n",
buffer, plane, off);
- off += vb->v4l2_planes[plane].length;
+ off += vb->planes[plane].length;
off = PAGE_ALIGN(off);
}
}
@@ -346,7 +198,7 @@ static void __setup_offsets(struct vb2_queue *q, unsigned int n)
*
* Returns the number of buffers successfully allocated.
*/
-static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
+static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
unsigned int num_buffers, unsigned int num_planes)
{
unsigned int buffer;
@@ -361,19 +213,15 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
break;
}
- /* Length stores number of planes for multiplanar buffers */
- if (V4L2_TYPE_IS_MULTIPLANAR(q->type))
- vb->v4l2_buf.length = num_planes;
-
vb->state = VB2_BUF_STATE_DEQUEUED;
vb->vb2_queue = q;
vb->num_planes = num_planes;
- vb->v4l2_buf.index = q->num_buffers + buffer;
- vb->v4l2_buf.type = q->type;
- vb->v4l2_buf.memory = memory;
+ vb->index = q->num_buffers + buffer;
+ vb->type = q->type;
+ vb->memory = memory;
/* Allocate video buffer memory for the MMAP type */
- if (memory == V4L2_MEMORY_MMAP) {
+ if (memory == VB2_MEMORY_MMAP) {
ret = __vb2_buf_mem_alloc(vb);
if (ret) {
dprintk(1, "failed allocating memory for "
@@ -400,7 +248,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum v4l2_memory memory,
}
__setup_lengths(q, buffer);
- if (memory == V4L2_MEMORY_MMAP)
+ if (memory == VB2_MEMORY_MMAP)
__setup_offsets(q, buffer);
dprintk(1, "allocated %d buffers, %d plane(s) each\n",
@@ -424,9 +272,9 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
continue;
/* Free MMAP buffers or release USERPTR buffers */
- if (q->memory == V4L2_MEMORY_MMAP)
+ if (q->memory == VB2_MEMORY_MMAP)
__vb2_buf_mem_free(vb);
- else if (q->memory == V4L2_MEMORY_DMABUF)
+ else if (q->memory == VB2_MEMORY_DMABUF)
__vb2_buf_dmabuf_put(vb);
else
__vb2_buf_userptr_put(vb);
@@ -482,7 +330,7 @@ static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming ||
q->cnt_wait_prepare != q->cnt_wait_finish;
- if (unbalanced || debug) {
+ if (unbalanced || vb2_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",
@@ -508,7 +356,7 @@ static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
vb->cnt_buf_prepare != vb->cnt_buf_finish ||
vb->cnt_buf_init != vb->cnt_buf_cleanup;
- if (unbalanced || debug) {
+ if (unbalanced || vb2_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",
@@ -550,76 +398,10 @@ static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
}
/**
- * __verify_planes_array() - 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)
-{
- 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 "
- "planes array not provided\n");
- return -EINVAL;
- }
-
- if (b->length < vb->num_planes || b->length > VIDEO_MAX_PLANES) {
- dprintk(1, "incorrect planes array length, "
- "expected %d, got %d\n", vb->num_planes, b->length);
- return -EINVAL;
- }
-
- 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, const struct v4l2_buffer *b)
-{
- 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
- : vb->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 : vb->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
+ * vb2_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)
+bool vb2_buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb)
{
unsigned int plane;
for (plane = 0; plane < vb->num_planes; ++plane) {
@@ -635,6 +417,7 @@ static bool __buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb)
}
return false;
}
+EXPORT_SYMBOL(vb2_buffer_in_use);
/**
* __buffers_in_use() - return true if any buffers on the queue are in use and
@@ -644,122 +427,30 @@ 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]))
+ if (vb2_buffer_in_use(q, q->bufs[buffer]))
return true;
}
return false;
}
/**
- * __fill_v4l2_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)
-{
- struct vb2_queue *q = vb->vb2_queue;
-
- /* Copy back data such as timestamp, flags, etc. */
- memcpy(b, &vb->v4l2_buf, offsetof(struct v4l2_buffer, m));
- b->reserved2 = vb->v4l2_buf.reserved2;
- b->reserved = vb->v4l2_buf.reserved;
-
- if (V4L2_TYPE_IS_MULTIPLANAR(q->type)) {
- /*
- * Fill in plane-related data if userspace provided an array
- * for it. The caller has already verified memory and size.
- */
- b->length = vb->num_planes;
- memcpy(b->m.planes, vb->v4l2_planes,
- b->length * sizeof(struct v4l2_plane));
- } else {
- /*
- * We use length and offset in v4l2_planes array even for
- * single-planar buffers, but userspace does not.
- */
- b->length = vb->v4l2_planes[0].length;
- b->bytesused = vb->v4l2_planes[0].bytesused;
- if (q->memory == V4L2_MEMORY_MMAP)
- b->m.offset = vb->v4l2_planes[0].m.mem_offset;
- else if (q->memory == V4L2_MEMORY_USERPTR)
- b->m.userptr = vb->v4l2_planes[0].m.userptr;
- else if (q->memory == V4L2_MEMORY_DMABUF)
- b->m.fd = vb->v4l2_planes[0].m.fd;
- }
-
- /*
- * Clear any buffer state related flags.
- */
- b->flags &= ~V4L2_BUFFER_MASK_FLAGS;
- b->flags |= q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK;
- if ((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) !=
- V4L2_BUF_FLAG_TIMESTAMP_COPY) {
- /*
- * For non-COPY timestamps, drop timestamp source bits
- * and obtain the timestamp source from the queue.
- */
- b->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
- b->flags |= q->timestamp_flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
- }
-
- switch (vb->state) {
- case VB2_BUF_STATE_QUEUED:
- case VB2_BUF_STATE_ACTIVE:
- b->flags |= V4L2_BUF_FLAG_QUEUED;
- break;
- case VB2_BUF_STATE_ERROR:
- b->flags |= V4L2_BUF_FLAG_ERROR;
- /* fall through */
- case VB2_BUF_STATE_DONE:
- b->flags |= V4L2_BUF_FLAG_DONE;
- break;
- case VB2_BUF_STATE_PREPARED:
- b->flags |= V4L2_BUF_FLAG_PREPARED;
- break;
- case VB2_BUF_STATE_PREPARING:
- case VB2_BUF_STATE_DEQUEUED:
- case VB2_BUF_STATE_REQUEUEING:
- /* nothing */
- break;
- }
-
- if (__buffer_in_use(q, vb))
- b->flags |= V4L2_BUF_FLAG_MAPPED;
-}
-
-/**
- * vb2_querybuf() - query video buffer information
+ * vb2_core_querybuf() - query video buffer information
* @q: videobuf queue
- * @b: buffer struct passed from userspace to vidioc_querybuf handler
- * in driver
+ * @index: id number of the buffer
+ * @pb: buffer struct passed from userspace
*
* 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 passed buffer should have been verified.
+ * This function fills 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)
+int vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb)
{
- 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;
+ return call_bufop(q, fill_user_buffer, q->bufs[index], pb);
}
-EXPORT_SYMBOL(vb2_querybuf);
+EXPORT_SYMBOL_GPL(vb2_core_querybuf);
/**
* __verify_userptr_ops() - verify that all memory operations required for
@@ -802,14 +493,14 @@ static int __verify_dmabuf_ops(struct vb2_queue *q)
}
/**
- * __verify_memory_type() - Check whether the memory type and buffer type
+ * vb2_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)
+int vb2_verify_memory_type(struct vb2_queue *q,
+ enum vb2_memory memory, unsigned int type)
{
- if (memory != V4L2_MEMORY_MMAP && memory != V4L2_MEMORY_USERPTR &&
- memory != V4L2_MEMORY_DMABUF) {
+ if (memory != VB2_MEMORY_MMAP && memory != VB2_MEMORY_USERPTR &&
+ memory != VB2_MEMORY_DMABUF) {
dprintk(1, "unsupported memory type\n");
return -EINVAL;
}
@@ -823,17 +514,17 @@ static int __verify_memory_type(struct vb2_queue *q,
* Make sure all the required memory ops for given memory type
* are available.
*/
- if (memory == V4L2_MEMORY_MMAP && __verify_mmap_ops(q)) {
+ if (memory == VB2_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)) {
+ if (memory == VB2_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)) {
+ if (memory == VB2_MEMORY_DMABUF && __verify_dmabuf_ops(q)) {
dprintk(1, "DMABUF for current setup unsupported\n");
return -EINVAL;
}
@@ -849,11 +540,13 @@ static int __verify_memory_type(struct vb2_queue *q,
}
return 0;
}
+EXPORT_SYMBOL(vb2_verify_memory_type);
/**
- * __reqbufs() - Initiate streaming
+ * vb2_core_reqbufs() - Initiate streaming
* @q: videobuf2 queue
- * @req: struct passed from userspace to vidioc_reqbufs handler in driver
+ * @memory: memory type
+ * @count: requested buffer count
*
* Should be called from vidioc_reqbufs ioctl handler of a driver.
* This function:
@@ -873,7 +566,8 @@ static int __verify_memory_type(struct vb2_queue *q,
* 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)
+int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
+ unsigned int *count)
{
unsigned int num_buffers, allocated_buffers, num_planes = 0;
int ret;
@@ -883,13 +577,13 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
return -EBUSY;
}
- if (req->count == 0 || q->num_buffers != 0 || q->memory != req->memory) {
+ 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)) {
+ if (q->memory == VB2_MEMORY_MMAP && __buffers_in_use(q)) {
mutex_unlock(&q->mmap_lock);
dprintk(1, "memory in use, cannot free\n");
return -EBUSY;
@@ -910,18 +604,18 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
* In case of REQBUFS(0) return immediately without calling
* driver's queue_setup() callback and allocating resources.
*/
- if (req->count == 0)
+ if (*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 = min_t(unsigned int, *count, VB2_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;
+ q->memory = memory;
/*
* Ask the driver how many buffers and planes per buffer it requires.
@@ -933,7 +627,8 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
return ret;
/* Finally, allocate buffers and video memory */
- allocated_buffers = __vb2_queue_alloc(q, req->memory, num_buffers, num_planes);
+ allocated_buffers =
+ __vb2_queue_alloc(q, memory, num_buffers, num_planes);
if (allocated_buffers == 0) {
dprintk(1, "memory allocation failed\n");
return -ENOMEM;
@@ -982,31 +677,19 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
* Return the number of successfully allocated buffers
* to the userspace.
*/
- req->count = allocated_buffers;
- q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
+ *count = allocated_buffers;
+ q->waiting_for_buffers = !q->is_output;
return 0;
}
+EXPORT_SYMBOL_GPL(vb2_core_reqbufs);
/**
- * vb2_reqbufs() - Wrapper for __reqbufs() that also verifies the memory and
- * type values.
+ * vb2_core_create_bufs() - Allocate buffers and any required auxiliary structs
* @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
+ * @memory: memory type
+ * @count: requested buffer count
+ * @parg: parameter passed to device driver
*
* Should be called from vidioc_create_bufs ioctl handler of a driver.
* This function:
@@ -1017,12 +700,13 @@ EXPORT_SYMBOL_GPL(vb2_reqbufs);
* 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)
+int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
+ unsigned int *count, const void *parg)
{
unsigned int num_planes = 0, num_buffers, allocated_buffers;
int ret;
- if (q->num_buffers == VIDEO_MAX_FRAME) {
+ if (q->num_buffers == VB2_MAX_FRAME) {
dprintk(1, "maximum number of buffers already allocated\n");
return -ENOBUFS;
}
@@ -1030,23 +714,23 @@ static int __create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create
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);
+ q->memory = memory;
+ q->waiting_for_buffers = !q->is_output;
}
- num_buffers = min(create->count, VIDEO_MAX_FRAME - q->num_buffers);
+ num_buffers = min(*count, VB2_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,
+ 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, create->memory, num_buffers,
+ allocated_buffers = __vb2_queue_alloc(q, memory, num_buffers,
num_planes);
if (allocated_buffers == 0) {
dprintk(1, "memory allocation failed\n");
@@ -1063,7 +747,7 @@ static int __create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create
* 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,
+ ret = call_qop(q, queue_setup, q, parg, &num_buffers,
&num_planes, q->plane_sizes, q->alloc_ctx);
if (!ret && allocated_buffers < num_buffers)
@@ -1093,28 +777,11 @@ static int __create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create
* Return the number of successfully allocated buffers
* to the userspace.
*/
- create->count = allocated_buffers;
+ *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);
+EXPORT_SYMBOL_GPL(vb2_core_create_bufs);
/**
* vb2_plane_vaddr() - Return a kernel virtual address of a given plane
@@ -1197,7 +864,7 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)
vb->cnt_buf_done++;
#endif
dprintk(4, "done processing on buffer %d, state: %d\n",
- vb->v4l2_buf.index, state);
+ vb->index, state);
/* sync buffers */
for (plane = 0; plane < vb->num_planes; ++plane)
@@ -1256,182 +923,41 @@ void vb2_discard_done(struct vb2_queue *q)
}
EXPORT_SYMBOL_GPL(vb2_discard_done);
-static void vb2_warn_zero_bytesused(struct vb2_buffer *vb)
-{
- static bool check_once;
-
- if (check_once)
- return;
-
- check_once = true;
- WARN_ON(1);
-
- pr_warn("use of bytesused == 0 is deprecated and will be removed in the future,\n");
- if (vb->vb2_queue->allow_zero_bytesused)
- pr_warn("use VIDIOC_DECODER_CMD(V4L2_DEC_CMD_STOP) instead.\n");
- else
- pr_warn("use the actual size instead.\n");
-}
-
-/**
- * __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)
-{
- unsigned int plane;
-
- if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) {
- if (b->memory == V4L2_MEMORY_USERPTR) {
- for (plane = 0; plane < vb->num_planes; ++plane) {
- v4l2_planes[plane].m.userptr =
- b->m.planes[plane].m.userptr;
- v4l2_planes[plane].length =
- b->m.planes[plane].length;
- }
- }
- if (b->memory == V4L2_MEMORY_DMABUF) {
- for (plane = 0; plane < vb->num_planes; ++plane) {
- v4l2_planes[plane].m.fd =
- b->m.planes[plane].m.fd;
- v4l2_planes[plane].length =
- b->m.planes[plane].length;
- }
- }
-
- /* Fill in driver-provided information for OUTPUT types */
- if (V4L2_TYPE_IS_OUTPUT(b->type)) {
- /*
- * Will have to go up to b->length when API starts
- * accepting variable number of planes.
- *
- * If bytesused == 0 for the output buffer, then fall
- * back to the full buffer size. In that case
- * userspace clearly never bothered to set it and
- * it's a safe assumption that they really meant to
- * use the full plane sizes.
- *
- * Some drivers, e.g. old codec drivers, use bytesused == 0
- * as a way to indicate that streaming is finished.
- * In that case, the driver should use the
- * allow_zero_bytesused flag to keep old userspace
- * applications working.
- */
- for (plane = 0; plane < vb->num_planes; ++plane) {
- struct v4l2_plane *pdst = &v4l2_planes[plane];
- struct v4l2_plane *psrc = &b->m.planes[plane];
-
- if (psrc->bytesused == 0)
- vb2_warn_zero_bytesused(vb);
-
- if (vb->vb2_queue->allow_zero_bytesused)
- pdst->bytesused = psrc->bytesused;
- else
- pdst->bytesused = psrc->bytesused ?
- psrc->bytesused : pdst->length;
- pdst->data_offset = psrc->data_offset;
- }
- }
- } else {
- /*
- * Single-planar buffers do not use planes array,
- * so fill in relevant v4l2_buffer struct fields instead.
- * In videobuf we use our internal V4l2_planes struct for
- * single-planar buffers as well, for simplicity.
- *
- * If bytesused == 0 for the output buffer, then fall back
- * to the full buffer size as that's a sensible default.
- *
- * Some drivers, e.g. old codec drivers, use bytesused == 0 as
- * a way to indicate that streaming is finished. In that case,
- * the driver should use the allow_zero_bytesused flag to keep
- * old userspace applications working.
- */
- if (b->memory == V4L2_MEMORY_USERPTR) {
- v4l2_planes[0].m.userptr = b->m.userptr;
- v4l2_planes[0].length = b->length;
- }
-
- if (b->memory == V4L2_MEMORY_DMABUF) {
- v4l2_planes[0].m.fd = b->m.fd;
- v4l2_planes[0].length = b->length;
- }
-
- if (V4L2_TYPE_IS_OUTPUT(b->type)) {
- if (b->bytesused == 0)
- vb2_warn_zero_bytesused(vb);
-
- if (vb->vb2_queue->allow_zero_bytesused)
- v4l2_planes[0].bytesused = b->bytesused;
- else
- v4l2_planes[0].bytesused = b->bytesused ?
- b->bytesused : v4l2_planes[0].length;
- } else
- v4l2_planes[0].bytesused = 0;
-
- }
-
- /* Zero flags that the vb2 core handles */
- vb->v4l2_buf.flags = b->flags & ~V4L2_BUFFER_MASK_FLAGS;
- if ((vb->vb2_queue->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) !=
- V4L2_BUF_FLAG_TIMESTAMP_COPY || !V4L2_TYPE_IS_OUTPUT(b->type)) {
- /*
- * Non-COPY timestamps and non-OUTPUT queues will get
- * their timestamp and timestamp source flags from the
- * queue.
- */
- vb->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.
- */
- vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TIMECODE;
- vb->v4l2_buf.field = b->field;
- } else {
- /* Zero any output buffer flags as this is a capture buffer */
- vb->v4l2_buf.flags &= ~V4L2_BUFFER_OUT_FLAGS;
- }
-}
-
/**
* __qbuf_mmap() - handle qbuf of an MMAP buffer
*/
-static int __qbuf_mmap(struct vb2_buffer *vb, const struct v4l2_buffer *b)
+static int __qbuf_mmap(struct vb2_buffer *vb, const void *pb)
{
- __fill_vb2_buffer(vb, b, vb->v4l2_planes);
- return call_vb_qop(vb, buf_prepare, vb);
+ int ret = call_bufop(vb->vb2_queue, fill_vb2_buffer,
+ vb, pb, vb->planes);
+ return ret ? ret : call_vb_qop(vb, buf_prepare, vb);
}
/**
* __qbuf_userptr() - handle qbuf of a USERPTR buffer
*/
-static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
+static int __qbuf_userptr(struct vb2_buffer *vb, const void *pb)
{
- struct v4l2_plane planes[VIDEO_MAX_PLANES];
+ struct vb2_plane planes[VB2_MAX_PLANES];
struct vb2_queue *q = vb->vb2_queue;
void *mem_priv;
unsigned int plane;
int ret;
enum dma_data_direction dma_dir =
- V4L2_TYPE_IS_OUTPUT(q->type) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+ q->is_output ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
bool reacquired = vb->planes[0].mem_priv == NULL;
memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
- __fill_vb2_buffer(vb, b, planes);
+ ret = call_bufop(vb->vb2_queue, fill_vb2_buffer, vb, pb, planes);
+ if (ret)
+ return ret;
for (plane = 0; plane < vb->num_planes; ++plane) {
/* Skip the plane if already verified */
- if (vb->v4l2_planes[plane].m.userptr &&
- vb->v4l2_planes[plane].m.userptr == planes[plane].m.userptr
- && vb->v4l2_planes[plane].length == planes[plane].length)
+ if (vb->planes[plane].m.userptr &&
+ vb->planes[plane].m.userptr == planes[plane].m.userptr
+ && vb->planes[plane].length == planes[plane].length)
continue;
dprintk(3, "userspace address for plane %d changed, "
@@ -1457,7 +983,10 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
}
vb->planes[plane].mem_priv = NULL;
- memset(&vb->v4l2_planes[plane], 0, sizeof(struct v4l2_plane));
+ vb->planes[plane].bytesused = 0;
+ vb->planes[plane].length = 0;
+ vb->planes[plane].m.userptr = 0;
+ vb->planes[plane].data_offset = 0;
/* Acquire each plane's memory */
mem_priv = call_ptr_memop(vb, get_userptr, q->alloc_ctx[plane],
@@ -1476,8 +1005,12 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
* Now that everything is in order, copy relevant information
* provided by userspace.
*/
- for (plane = 0; plane < vb->num_planes; ++plane)
- vb->v4l2_planes[plane] = planes[plane];
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ vb->planes[plane].bytesused = planes[plane].bytesused;
+ vb->planes[plane].length = planes[plane].length;
+ vb->planes[plane].m.userptr = planes[plane].m.userptr;
+ vb->planes[plane].data_offset = planes[plane].data_offset;
+ }
if (reacquired) {
/*
@@ -1504,10 +1037,11 @@ err:
/* In case of errors, release planes that were already acquired */
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);
+ call_void_memop(vb, put_userptr,
+ vb->planes[plane].mem_priv);
vb->planes[plane].mem_priv = NULL;
- vb->v4l2_planes[plane].m.userptr = 0;
- vb->v4l2_planes[plane].length = 0;
+ vb->planes[plane].m.userptr = 0;
+ vb->planes[plane].length = 0;
}
return ret;
@@ -1516,20 +1050,22 @@ err:
/**
* __qbuf_dmabuf() - handle qbuf of a DMABUF buffer
*/
-static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
+static int __qbuf_dmabuf(struct vb2_buffer *vb, const void *pb)
{
- struct v4l2_plane planes[VIDEO_MAX_PLANES];
+ struct vb2_plane planes[VB2_MAX_PLANES];
struct vb2_queue *q = vb->vb2_queue;
void *mem_priv;
unsigned int plane;
int ret;
enum dma_data_direction dma_dir =
- V4L2_TYPE_IS_OUTPUT(q->type) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+ q->is_output ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
bool reacquired = vb->planes[0].mem_priv == NULL;
memset(planes, 0, sizeof(planes[0]) * vb->num_planes);
/* Copy relevant information provided by the userspace */
- __fill_vb2_buffer(vb, b, planes);
+ ret = call_bufop(vb->vb2_queue, fill_vb2_buffer, vb, pb, planes);
+ if (ret)
+ return ret;
for (plane = 0; plane < vb->num_planes; ++plane) {
struct dma_buf *dbuf = dma_buf_get(planes[plane].m.fd);
@@ -1554,7 +1090,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
/* Skip the plane if already verified */
if (dbuf == vb->planes[plane].dbuf &&
- vb->v4l2_planes[plane].length == planes[plane].length) {
+ vb->planes[plane].length == planes[plane].length) {
dma_buf_put(dbuf);
continue;
}
@@ -1568,11 +1104,15 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
/* Release previously acquired memory if present */
__vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
- memset(&vb->v4l2_planes[plane], 0, sizeof(struct v4l2_plane));
+ vb->planes[plane].bytesused = 0;
+ vb->planes[plane].length = 0;
+ vb->planes[plane].m.fd = 0;
+ vb->planes[plane].data_offset = 0;
/* Acquire each plane's memory */
- mem_priv = call_ptr_memop(vb, attach_dmabuf, q->alloc_ctx[plane],
- dbuf, planes[plane].length, dma_dir);
+ 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");
ret = PTR_ERR(mem_priv);
@@ -1602,8 +1142,12 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
* Now that everything is in order, copy relevant information
* provided by userspace.
*/
- for (plane = 0; plane < vb->num_planes; ++plane)
- vb->v4l2_planes[plane] = planes[plane];
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ vb->planes[plane].bytesused = planes[plane].bytesused;
+ vb->planes[plane].length = planes[plane].length;
+ vb->planes[plane].m.fd = planes[plane].m.fd;
+ vb->planes[plane].data_offset = planes[plane].data_offset;
+ }
if (reacquired) {
/*
@@ -1652,49 +1196,27 @@ static void __enqueue_in_driver(struct vb2_buffer *vb)
call_void_vb_qop(vb, buf_queue, vb);
}
-static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
+static int __buf_prepare(struct vb2_buffer *vb, const void *pb)
{
struct vb2_queue *q = vb->vb2_queue;
int ret;
- ret = __verify_length(vb, b);
- if (ret < 0) {
- dprintk(1, "plane parameters verification failed: %d\n", ret);
- return ret;
- }
- if (b->field == V4L2_FIELD_ALTERNATE && V4L2_TYPE_IS_OUTPUT(q->type)) {
- /*
- * If the format's field is ALTERNATE, then the buffer's field
- * should be either TOP or BOTTOM, not ALTERNATE since that
- * makes no sense. The driver has to know whether the
- * buffer represents a top or a bottom field in order to
- * program any DMA correctly. Using ALTERNATE is wrong, since
- * 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");
- return -EINVAL;
- }
-
if (q->error) {
dprintk(1, "fatal error occurred on queue\n");
return -EIO;
}
vb->state = VB2_BUF_STATE_PREPARING;
- vb->v4l2_buf.timestamp.tv_sec = 0;
- vb->v4l2_buf.timestamp.tv_usec = 0;
- vb->v4l2_buf.sequence = 0;
switch (q->memory) {
- case V4L2_MEMORY_MMAP:
- ret = __qbuf_mmap(vb, b);
+ case VB2_MEMORY_MMAP:
+ ret = __qbuf_mmap(vb, pb);
break;
- case V4L2_MEMORY_USERPTR:
- ret = __qbuf_userptr(vb, b);
+ case VB2_MEMORY_USERPTR:
+ ret = __qbuf_userptr(vb, pb);
break;
- case V4L2_MEMORY_DMABUF:
- ret = __qbuf_dmabuf(vb, b);
+ case VB2_MEMORY_DMABUF:
+ ret = __qbuf_dmabuf(vb, pb);
break;
default:
WARN(1, "Invalid queue type\n");
@@ -1708,79 +1230,48 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
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
+ * 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
+ * @index: id number of the buffer
+ * @pb: 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 passed buffer should have been verified.
+ * This function 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)
+int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb)
{
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];
+ vb = q->bufs[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);
+ ret = __buf_prepare(vb, pb);
+ if (ret)
+ return ret;
+
+ /* Fill buffer information for the userspace */
+ ret = call_bufop(q, fill_user_buffer, vb, pb);
+ if (ret)
+ return ret;
+
+ dprintk(1, "prepare of buffer %d succeeded\n", vb->index);
- dprintk(1, "prepare of buffer %d succeeded\n", vb->v4l2_buf.index);
- }
return ret;
}
-EXPORT_SYMBOL_GPL(vb2_prepare_buf);
+EXPORT_SYMBOL_GPL(vb2_core_prepare_buf);
/**
* vb2_start_streaming() - Attempt to start streaming.
@@ -1845,19 +1336,34 @@ static int vb2_start_streaming(struct vb2_queue *q)
return ret;
}
-static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
+/**
+ * vb2_core_qbuf() - Queue a buffer from userspace
+ * @q: videobuf2 queue
+ * @index: id number of the buffer
+ * @pb: buffer structure passed from userspace to vidioc_qbuf handler
+ * in driver
+ *
+ * Should be called from vidioc_qbuf ioctl handler of a driver.
+ * The passed buffer should have been verified.
+ * This function:
+ * 1) if necessary, calls buf_prepare callback in the driver (if provided), in
+ * which driver-specific buffer initialization can be performed,
+ * 2) 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_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb)
{
- int ret = vb2_queue_or_prepare_buf(q, b, "qbuf");
struct vb2_buffer *vb;
+ int ret;
- if (ret)
- return ret;
-
- vb = q->bufs[b->index];
+ vb = q->bufs[index];
switch (vb->state) {
case VB2_BUF_STATE_DEQUEUED:
- ret = __buf_prepare(vb, b);
+ ret = __buf_prepare(vb, pb);
if (ret)
return ret;
break;
@@ -1879,18 +1385,8 @@ static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
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.
- */
- if ((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
- V4L2_BUF_FLAG_TIMESTAMP_COPY)
- vb->v4l2_buf.timestamp = b->timestamp;
- vb->v4l2_buf.flags |= b->flags & V4L2_BUF_FLAG_TIMECODE;
- if (b->flags & V4L2_BUF_FLAG_TIMECODE)
- vb->v4l2_buf.timecode = b->timecode;
- }
+
+ call_bufop(q, set_timestamp, vb, pb);
trace_vb2_qbuf(q, vb);
@@ -1902,7 +1398,9 @@ static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
__enqueue_in_driver(vb);
/* Fill buffer information for the userspace */
- __fill_v4l2_buffer(vb, b);
+ ret = call_bufop(q, fill_user_buffer, vb, pb);
+ if (ret)
+ return ret;
/*
* If streamon has been called, and we haven't yet called
@@ -1917,37 +1415,10 @@ static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
return ret;
}
- dprintk(1, "qbuf of buffer %d succeeded\n", vb->v4l2_buf.index);
+ dprintk(1, "qbuf of buffer %d succeeded\n", vb->index);
return 0;
}
-
-/**
- * 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)
-{
- if (vb2_fileio_is_active(q)) {
- dprintk(1, "file io in progress\n");
- return -EBUSY;
- }
-
- return vb2_internal_qbuf(q, b);
-}
-EXPORT_SYMBOL_GPL(vb2_qbuf);
+EXPORT_SYMBOL_GPL(vb2_core_qbuf);
/**
* __vb2_wait_for_done_vb() - wait for a buffer to become available
@@ -2031,7 +1502,7 @@ static int __vb2_wait_for_done_vb(struct vb2_queue *q, int nonblocking)
* Will sleep if required for nonblocking == false.
*/
static int __vb2_get_done_vb(struct vb2_queue *q, struct vb2_buffer **vb,
- struct v4l2_buffer *b, int nonblocking)
+ int nonblocking)
{
unsigned long flags;
int ret;
@@ -2052,10 +1523,10 @@ static int __vb2_get_done_vb(struct vb2_queue *q, struct vb2_buffer **vb,
/*
* Only remove the buffer from done_list if v4l2_buffer can handle all
* the planes.
+ * Verifying planes is NOT necessary since it already has been checked
+ * before the buffer is queued/prepared. So it can never fail.
*/
- ret = __verify_planes_array(*vb, b);
- if (!ret)
- list_del(&(*vb)->done_entry);
+ list_del(&(*vb)->done_entry);
spin_unlock_irqrestore(&q->done_lock, flags);
return ret;
@@ -2098,7 +1569,7 @@ static void __vb2_dqbuf(struct vb2_buffer *vb)
vb->state = VB2_BUF_STATE_DEQUEUED;
/* unmap DMABUF buffer */
- if (q->memory == V4L2_MEMORY_DMABUF)
+ if (q->memory == VB2_MEMORY_DMABUF)
for (i = 0; i < vb->num_planes; ++i) {
if (!vb->planes[i].dbuf_mapped)
continue;
@@ -2107,16 +1578,33 @@ static void __vb2_dqbuf(struct vb2_buffer *vb)
}
}
-static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking)
+/**
+ * vb2_dqbuf() - Dequeue a buffer to the userspace
+ * @q: videobuf2 queue
+ * @pb: buffer structure passed from userspace to vidioc_dqbuf handler
+ * in driver
+ * @nonblocking: if true, this call will not sleep waiting for a buffer if no
+ * buffers ready for dequeuing are present. Normally the driver
+ * would be passing (file->f_flags & O_NONBLOCK) here
+ *
+ * Should be called from vidioc_dqbuf ioctl handler of a driver.
+ * The passed buffer should have been verified.
+ * This function:
+ * 1) calls buf_finish callback in the driver (if provided), in which
+ * driver can perform any additional operations that may be required before
+ * returning the buffer to userspace, such as cache sync,
+ * 2) the buffer struct members are filled with relevant information for
+ * the userspace.
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_dqbuf handler in driver.
+ */
+int vb2_core_dqbuf(struct vb2_queue *q, void *pb, bool nonblocking)
{
struct vb2_buffer *vb = 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);
+ ret = __vb2_get_done_vb(q, &vb, nonblocking);
if (ret < 0)
return ret;
@@ -2135,55 +1623,26 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
call_void_vb_qop(vb, buf_finish, vb);
/* Fill buffer information for the userspace */
- __fill_v4l2_buffer(vb, b);
+ ret = call_bufop(q, fill_user_buffer, vb, pb);
+ if (ret)
+ return ret;
+
/* Remove from videobuf queue */
list_del(&vb->queued_entry);
q->queued_count--;
trace_vb2_dqbuf(q, vb);
- if (!V4L2_TYPE_IS_OUTPUT(q->type) &&
- vb->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",
- vb->v4l2_buf.index, vb->state);
+ vb->index, vb->state);
return 0;
-}
-/**
- * vb2_dqbuf() - Dequeue a buffer to the userspace
- * @q: videobuf2 queue
- * @b: buffer structure passed from userspace to vidioc_dqbuf handler
- * in driver
- * @nonblocking: if true, this call will not sleep waiting for a buffer if no
- * buffers ready for dequeuing are present. Normally the driver
- * would be passing (file->f_flags & O_NONBLOCK) here
- *
- * Should be called from vidioc_dqbuf ioctl handler of a driver.
- * This function:
- * 1) verifies the passed buffer,
- * 2) calls buf_finish callback in the driver (if provided), in which
- * driver can perform any additional operations that may be required before
- * returning the buffer to userspace, such as cache sync,
- * 3) the buffer struct members are filled with relevant information for
- * the userspace.
- *
- * The return values from this function are intended to be directly returned
- * from vidioc_dqbuf handler in driver.
- */
-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");
- return -EBUSY;
- }
- return vb2_internal_dqbuf(q, b, nonblocking);
}
-EXPORT_SYMBOL_GPL(vb2_dqbuf);
+EXPORT_SYMBOL_GPL(vb2_core_dqbuf);
/**
* __vb2_queue_cancel() - cancel and stop (pause) streaming
@@ -2253,7 +1712,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q)
}
}
-static int vb2_internal_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
+int vb2_core_streamon(struct vb2_queue *q, unsigned int type)
{
int ret;
@@ -2295,6 +1754,7 @@ static int vb2_internal_streamon(struct vb2_queue *q, enum v4l2_buf_type type)
dprintk(3, "successful\n");
return 0;
}
+EXPORT_SYMBOL_GPL(vb2_core_streamon);
/**
* vb2_queue_error() - signal a fatal error on the queue
@@ -2317,30 +1777,7 @@ void vb2_queue_error(struct vb2_queue *q)
}
EXPORT_SYMBOL_GPL(vb2_queue_error);
-/**
- * vb2_streamon - start streaming
- * @q: videobuf2 queue
- * @type: type argument passed from userspace to vidioc_streamon handler
- *
- * Should be called from vidioc_streamon handler of a driver.
- * This function:
- * 1) verifies current state
- * 2) passes any previously queued buffers to the driver and starts streaming
- *
- * The return values from this function are intended to be directly returned
- * from vidioc_streamon handler in the driver.
- */
-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");
- 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)
+int vb2_core_streamoff(struct vb2_queue *q, unsigned int type)
{
if (type != q->type) {
dprintk(1, "invalid stream type\n");
@@ -2357,37 +1794,13 @@ static int vb2_internal_streamoff(struct vb2_queue *q, enum v4l2_buf_type type)
* their normal dequeued state.
*/
__vb2_queue_cancel(q);
- q->waiting_for_buffers = !V4L2_TYPE_IS_OUTPUT(q->type);
+ q->waiting_for_buffers = !q->is_output;
q->last_buffer_dequeued = false;
dprintk(3, "successful\n");
return 0;
}
-
-/**
- * vb2_streamoff - stop streaming
- * @q: videobuf2 queue
- * @type: type argument passed from userspace to vidioc_streamoff handler
- *
- * Should be called from vidioc_streamoff handler of a driver.
- * This function:
- * 1) verifies current state,
- * 2) stop streaming and dequeues any queued buffers, including those previously
- * passed to the driver (after waiting for the driver to finish).
- *
- * This call can be used for pausing playback.
- * The return values from this function are intended to be directly returned
- * from vidioc_streamoff handler in the driver
- */
-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");
- return -EBUSY;
- }
- return vb2_internal_streamoff(q, type);
-}
-EXPORT_SYMBOL_GPL(vb2_streamoff);
+EXPORT_SYMBOL_GPL(vb2_core_streamoff);
/**
* __find_plane_by_offset() - find plane associated with the given offset off
@@ -2407,7 +1820,7 @@ static int __find_plane_by_offset(struct vb2_queue *q, unsigned long off,
vb = q->bufs[buffer];
for (plane = 0; plane < vb->num_planes; ++plane) {
- if (vb->v4l2_planes[plane].m.mem_offset == off) {
+ if (vb->planes[plane].m.offset == off) {
*_buffer = buffer;
*_plane = plane;
return 0;
@@ -2419,22 +1832,27 @@ static int __find_plane_by_offset(struct vb2_queue *q, unsigned long off,
}
/**
- * vb2_expbuf() - Export a buffer as a file descriptor
+ * 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
+ * @fd: file descriptor associated with DMABUF (set by driver) *
+ * @type: buffer type
+ * @index: id number of the buffer
+ * @plane: index of the plane to be exported, 0 for single plane queues
+ * @flags: flags for newly created file, currently only O_CLOEXEC is
+ * supported, refer to manual of open syscall for more details
*
* 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)
+int vb2_core_expbuf(struct vb2_queue *q, int *fd, 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) {
+ if (q->memory != VB2_MEMORY_MMAP) {
dprintk(1, "queue is not currently set up for mmap\n");
return -EINVAL;
}
@@ -2444,24 +1862,24 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
return -EINVAL;
}
- if (eb->flags & ~(O_CLOEXEC | O_ACCMODE)) {
+ if (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) {
+ if (type != q->type) {
dprintk(1, "invalid buffer type\n");
return -EINVAL;
}
- if (eb->index >= q->num_buffers) {
+ if (index >= q->num_buffers) {
dprintk(1, "buffer index out of range\n");
return -EINVAL;
}
- vb = q->bufs[eb->index];
+ vb = q->bufs[index];
- if (eb->plane >= vb->num_planes) {
+ if (plane >= vb->num_planes) {
dprintk(1, "buffer plane out of range\n");
return -EINVAL;
}
@@ -2471,30 +1889,31 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
return -EBUSY;
}
- vb_plane = &vb->planes[eb->plane];
+ vb_plane = &vb->planes[plane];
- dbuf = call_ptr_memop(vb, get_dmabuf, vb_plane->mem_priv, eb->flags & O_ACCMODE);
+ dbuf = call_ptr_memop(vb, get_dmabuf, vb_plane->mem_priv,
+ flags & O_ACCMODE);
if (IS_ERR_OR_NULL(dbuf)) {
dprintk(1, "failed to export buffer %d, plane %d\n",
- eb->index, eb->plane);
+ index, plane);
return -EINVAL;
}
- ret = dma_buf_fd(dbuf, eb->flags & ~O_ACCMODE);
+ ret = dma_buf_fd(dbuf, flags & ~O_ACCMODE);
if (ret < 0) {
dprintk(3, "buffer %d, plane %d failed to export (%d)\n",
- eb->index, eb->plane, ret);
+ index, 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;
+ index, plane, ret);
+ *fd = ret;
return 0;
}
-EXPORT_SYMBOL_GPL(vb2_expbuf);
+EXPORT_SYMBOL_GPL(vb2_core_expbuf);
/**
* vb2_mmap() - map video buffers into application address space
@@ -2523,7 +1942,7 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
int ret;
unsigned long length;
- if (q->memory != V4L2_MEMORY_MMAP) {
+ if (q->memory != VB2_MEMORY_MMAP) {
dprintk(1, "queue is not currently set up for mmap\n");
return -EINVAL;
}
@@ -2535,7 +1954,7 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
dprintk(1, "invalid vma flags, VM_SHARED needed\n");
return -EINVAL;
}
- if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+ if (q->is_output) {
if (!(vma->vm_flags & VM_WRITE)) {
dprintk(1, "invalid vma flags, VM_WRITE needed\n");
return -EINVAL;
@@ -2565,7 +1984,7 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)
* The buffer length was page_aligned at __vb2_buf_mem_alloc(),
* so, we need to do the same here.
*/
- length = PAGE_ALIGN(vb->v4l2_planes[plane].length);
+ length = PAGE_ALIGN(vb->planes[plane].length);
if (length < (vma->vm_end - vma->vm_start)) {
dprintk(1,
"MMAP invalid, as it would overflow buffer length\n");
@@ -2596,7 +2015,7 @@ unsigned long vb2_get_unmapped_area(struct vb2_queue *q,
void *vaddr;
int ret;
- if (q->memory != V4L2_MEMORY_MMAP) {
+ if (q->memory != VB2_MEMORY_MMAP) {
dprintk(1, "queue is not currently set up for mmap\n");
return -EINVAL;
}
@@ -2616,123 +2035,8 @@ unsigned long vb2_get_unmapped_area(struct vb2_queue *q,
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);
-
-/**
- * vb2_poll() - implements poll userspace operation
- * @q: videobuf2 queue
- * @file: file argument passed to the poll file operation handler
- * @wait: wait argument passed to the poll file operation handler
- *
- * This function implements poll file operation handler for a driver.
- * For CAPTURE queues, if a buffer is ready to be dequeued, the userspace will
- * be informed that the file descriptor of a video device is available for
- * reading.
- * For OUTPUT queues, if a buffer is ready to be dequeued, the file descriptor
- * will be reported as available for writing.
- *
- * If the driver uses struct v4l2_fh, then vb2_poll() will also check for any
- * pending events.
- *
- * The return values from this function are intended to be directly returned
- * from poll handler in driver.
- */
-unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait)
-{
- struct video_device *vfd = video_devdata(file);
- unsigned long req_events = poll_requested_events(wait);
- struct vb2_buffer *vb = NULL;
- unsigned int res = 0;
- unsigned long flags;
-
- if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
- struct v4l2_fh *fh = file->private_data;
-
- if (v4l2_event_pending(fh))
- res = POLLPRI;
- else if (req_events & POLLPRI)
- poll_wait(file, &fh->wait, wait);
- }
-
- if (!V4L2_TYPE_IS_OUTPUT(q->type) && !(req_events & (POLLIN | POLLRDNORM)))
- return res;
- if (V4L2_TYPE_IS_OUTPUT(q->type) && !(req_events & (POLLOUT | POLLWRNORM)))
- return res;
-
- /*
- * Start file I/O emulator only if streaming API has not been used yet.
- */
- if (q->num_buffers == 0 && !vb2_fileio_is_active(q)) {
- if (!V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_READ) &&
- (req_events & (POLLIN | POLLRDNORM))) {
- if (__vb2_init_fileio(q, 1))
- return res | POLLERR;
- }
- if (V4L2_TYPE_IS_OUTPUT(q->type) && (q->io_modes & VB2_WRITE) &&
- (req_events & (POLLOUT | POLLWRNORM))) {
- if (__vb2_init_fileio(q, 0))
- return res | POLLERR;
- /*
- * Write to OUTPUT queue can be done immediately.
- */
- return res | POLLOUT | POLLWRNORM;
- }
- }
-
- /*
- * There is nothing to wait for if the queue isn't streaming, or if the
- * error flag is set.
- */
- if (!vb2_is_streaming(q) || q->error)
- return res | POLLERR;
- /*
- * For compatibility with vb1: if QBUF hasn't been called yet, then
- * return POLLERR as well. This only affects capture queues, output
- * queues will always initialize waiting_for_buffers to false.
- */
- if (q->waiting_for_buffers)
- return res | POLLERR;
-
- /*
- * For output streams you can write as long as there are fewer buffers
- * queued than there are buffers available.
- */
- if (V4L2_TYPE_IS_OUTPUT(q->type) && q->queued_count < q->num_buffers)
- return res | POLLOUT | POLLWRNORM;
-
- if (list_empty(&q->done_list)) {
- /*
- * If the last buffer was dequeued from a capture queue,
- * return immediately. DQBUF will return -EPIPE.
- */
- if (q->last_buffer_dequeued)
- return res | POLLIN | POLLRDNORM;
-
- poll_wait(file, &q->done_wq, wait);
- }
-
- /*
- * Take first buffer available for dequeuing.
- */
- spin_lock_irqsave(&q->done_lock, flags);
- if (!list_empty(&q->done_list))
- vb = list_first_entry(&q->done_list, struct vb2_buffer,
- done_entry);
- spin_unlock_irqrestore(&q->done_lock, flags);
-
- if (vb && (vb->state == VB2_BUF_STATE_DONE
- || vb->state == VB2_BUF_STATE_ERROR)) {
- return (V4L2_TYPE_IS_OUTPUT(q->type)) ?
- res | POLLOUT | POLLWRNORM :
- res | POLLIN | POLLRDNORM;
- }
- return res;
-}
-EXPORT_SYMBOL_GPL(vb2_poll);
-
/**
- * vb2_queue_init() - initialize a videobuf2 queue
+ * 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
@@ -2742,7 +2046,7 @@ EXPORT_SYMBOL_GPL(vb2_poll);
* to the struct vb2_queue description in include/media/videobuf2-core.h
* for more information.
*/
-int vb2_queue_init(struct vb2_queue *q)
+int vb2_core_queue_init(struct vb2_queue *q)
{
/*
* Sanity check
@@ -2753,16 +2057,9 @@ int vb2_queue_init(struct vb2_queue *q)
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 &
- ~(V4L2_BUF_FLAG_TIMESTAMP_MASK |
- V4L2_BUF_FLAG_TSTAMP_SRC_MASK)))
+ WARN_ON(!q->ops->buf_queue))
return -EINVAL;
- /* Warn that the driver should choose an appropriate timestamp type */
- 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);
@@ -2774,819 +2071,24 @@ int vb2_queue_init(struct vb2_queue *q)
return 0;
}
-EXPORT_SYMBOL_GPL(vb2_queue_init);
+EXPORT_SYMBOL_GPL(vb2_core_queue_init);
/**
- * vb2_queue_release() - stop streaming, release the queue and free memory
+ * 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_queue_release(struct vb2_queue *q)
+void vb2_core_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);
}
-EXPORT_SYMBOL_GPL(vb2_queue_release);
-
-/**
- * struct vb2_fileio_buf - buffer context used by file io emulator
- *
- * vb2 provides a compatibility layer and emulator of file io (read and
- * write) calls on top of streaming API. This structure is used for
- * tracking context related to the buffers.
- */
-struct vb2_fileio_buf {
- void *vaddr;
- unsigned int size;
- unsigned int pos;
- unsigned int queued:1;
-};
-
-/**
- * struct vb2_fileio_data - queue context used by file io emulator
- *
- * @cur_index: the index of the buffer currently being read from or
- * written to. If equal to q->num_buffers then a new buffer
- * must be dequeued.
- * @initial_index: in the read() case all buffers are queued up immediately
- * in __vb2_init_fileio() and __vb2_perform_fileio() just cycles
- * buffers. However, in the write() case no buffers are initially
- * queued, instead whenever a buffer is full it is queued up by
- * __vb2_perform_fileio(). Only once all available buffers have
- * been queued up will __vb2_perform_fileio() start to dequeue
- * buffers. This means that initially __vb2_perform_fileio()
- * needs to know what buffer index to use when it is queuing up
- * the buffers for the first time. That initial index is stored
- * in this field. Once it is equal to q->num_buffers all
- * available buffers have been queued and __vb2_perform_fileio()
- * should start the normal dequeue/queue cycle.
- *
- * vb2 provides a compatibility layer and emulator of file io (read and
- * write) calls on top of streaming API. For proper operation it required
- * this structure to save the driver state between each call of the read
- * or write function.
- */
-struct vb2_fileio_data {
- struct v4l2_requestbuffers req;
- struct v4l2_plane p;
- struct v4l2_buffer b;
- struct vb2_fileio_buf bufs[VIDEO_MAX_FRAME];
- unsigned int cur_index;
- unsigned int initial_index;
- unsigned int q_count;
- unsigned int dq_count;
- unsigned read_once:1;
- unsigned write_immediately:1;
-};
-
-/**
- * __vb2_init_fileio() - initialize file io emulator
- * @q: videobuf2 queue
- * @read: mode selector (1 means read, 0 means write)
- */
-static int __vb2_init_fileio(struct vb2_queue *q, int read)
-{
- struct vb2_fileio_data *fileio;
- int i, ret;
- unsigned int count = 0;
-
- /*
- * Sanity check
- */
- if (WARN_ON((read && !(q->io_modes & VB2_READ)) ||
- (!read && !(q->io_modes & VB2_WRITE))))
- return -EINVAL;
-
- /*
- * Check if device supports mapping buffers to kernel virtual space.
- */
- if (!q->mem_ops->vaddr)
- return -EBUSY;
-
- /*
- * Check if streaming api has not been already activated.
- */
- if (q->streaming || q->num_buffers > 0)
- return -EBUSY;
-
- /*
- * Start with count 1, driver can increase it in queue_setup()
- */
- count = 1;
-
- dprintk(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);
-
- fileio = kzalloc(sizeof(struct vb2_fileio_data), GFP_KERNEL);
- if (fileio == NULL)
- return -ENOMEM;
-
- fileio->read_once = q->fileio_read_once;
- fileio->write_immediately = q->fileio_write_immediately;
-
- /*
- * Request buffers and use MMAP type to force driver
- * to allocate buffers by itself.
- */
- fileio->req.count = count;
- fileio->req.memory = V4L2_MEMORY_MMAP;
- fileio->req.type = q->type;
- q->fileio = fileio;
- ret = __reqbufs(q, &fileio->req);
- if (ret)
- goto err_kfree;
-
- /*
- * Check if plane_count is correct
- * (multiplane buffers are not supported).
- */
- if (q->bufs[0]->num_planes != 1) {
- ret = -EBUSY;
- goto err_reqbufs;
- }
-
- /*
- * Get kernel address of each buffer.
- */
- for (i = 0; i < q->num_buffers; i++) {
- fileio->bufs[i].vaddr = vb2_plane_vaddr(q->bufs[i], 0);
- if (fileio->bufs[i].vaddr == NULL) {
- ret = -EINVAL;
- goto err_reqbufs;
- }
- fileio->bufs[i].size = vb2_plane_size(q->bufs[i], 0);
- }
-
- /*
- * Read mode requires pre queuing of all buffers.
- */
- if (read) {
- bool is_multiplanar = V4L2_TYPE_IS_MULTIPLANAR(q->type);
-
- /*
- * Queue all buffers.
- */
- for (i = 0; i < q->num_buffers; i++) {
- struct v4l2_buffer *b = &fileio->b;
-
- memset(b, 0, sizeof(*b));
- b->type = q->type;
- if (is_multiplanar) {
- memset(&fileio->p, 0, sizeof(fileio->p));
- b->m.planes = &fileio->p;
- b->length = 1;
- }
- b->memory = q->memory;
- b->index = i;
- ret = vb2_internal_qbuf(q, b);
- if (ret)
- goto err_reqbufs;
- fileio->bufs[i].queued = 1;
- }
- /*
- * All buffers have been queued, so mark that by setting
- * initial_index to q->num_buffers
- */
- fileio->initial_index = q->num_buffers;
- fileio->cur_index = q->num_buffers;
- }
-
- /*
- * Start streaming.
- */
- ret = vb2_internal_streamon(q, q->type);
- if (ret)
- goto err_reqbufs;
-
- return ret;
-
-err_reqbufs:
- fileio->req.count = 0;
- __reqbufs(q, &fileio->req);
-
-err_kfree:
- q->fileio = NULL;
- kfree(fileio);
- return ret;
-}
-
-/**
- * __vb2_cleanup_fileio() - free resourced used by file io emulator
- * @q: videobuf2 queue
- */
-static int __vb2_cleanup_fileio(struct vb2_queue *q)
-{
- struct vb2_fileio_data *fileio = q->fileio;
-
- if (fileio) {
- vb2_internal_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");
- }
- return 0;
-}
-
-/**
- * __vb2_perform_fileio() - perform a single file io (read or write) operation
- * @q: videobuf2 queue
- * @data: pointed to target userspace buffer
- * @count: number of bytes to read or write
- * @ppos: file handle position tracking pointer
- * @nonblock: mode selector (1 means blocking calls, 0 means nonblocking)
- * @read: access mode selector (1 means read, 0 means write)
- */
-static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_t count,
- loff_t *ppos, int nonblock, int read)
-{
- struct vb2_fileio_data *fileio;
- struct vb2_fileio_buf *buf;
- bool is_multiplanar = V4L2_TYPE_IS_MULTIPLANAR(q->type);
- /*
- * When using write() to write data to an output video node the vb2 core
- * should set timestamps if V4L2_BUF_FLAG_TIMESTAMP_COPY is set. Nobody
- * else is able to provide this information with the write() operation.
- */
- bool set_timestamp = !read &&
- (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
- V4L2_BUF_FLAG_TIMESTAMP_COPY;
- int ret, index;
-
- dprintk(3, "mode %s, offset %ld, count %zd, %sblocking\n",
- read ? "read" : "write", (long)*ppos, count,
- nonblock ? "non" : "");
-
- if (!data)
- return -EINVAL;
-
- /*
- * Initialize emulator on first call.
- */
- if (!vb2_fileio_is_active(q)) {
- ret = __vb2_init_fileio(q, read);
- dprintk(3, "vb2_init_fileio result: %d\n", ret);
- if (ret)
- return ret;
- }
- fileio = q->fileio;
-
- /*
- * Check if we need to dequeue the buffer.
- */
- index = fileio->cur_index;
- if (index >= q->num_buffers) {
- /*
- * Call vb2_dqbuf to get buffer back.
- */
- memset(&fileio->b, 0, sizeof(fileio->b));
- fileio->b.type = q->type;
- fileio->b.memory = q->memory;
- if (is_multiplanar) {
- memset(&fileio->p, 0, sizeof(fileio->p));
- 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);
- if (ret)
- return ret;
- fileio->dq_count += 1;
-
- fileio->cur_index = index = fileio->b.index;
- buf = &fileio->bufs[index];
-
- /*
- * Get number of bytes filled by the driver
- */
- buf->pos = 0;
- buf->queued = 0;
- buf->size = read ? vb2_get_plane_payload(q->bufs[index], 0)
- : vb2_plane_size(q->bufs[index], 0);
- /* Compensate for data_offset on read in the multiplanar case. */
- if (is_multiplanar && read &&
- fileio->b.m.planes[0].data_offset < buf->size) {
- buf->pos = fileio->b.m.planes[0].data_offset;
- buf->size -= buf->pos;
- }
- } else {
- buf = &fileio->bufs[index];
- }
-
- /*
- * Limit count on last few bytes of the buffer.
- */
- if (buf->pos + count > buf->size) {
- count = buf->size - buf->pos;
- dprintk(5, "reducing read count: %zd\n", count);
- }
-
- /*
- * Transfer data to userspace.
- */
- dprintk(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");
- return -EFAULT;
- }
-
- /*
- * Update counters.
- */
- buf->pos += count;
- *ppos += count;
-
- /*
- * Queue next buffer if required.
- */
- if (buf->pos == buf->size || (!read && fileio->write_immediately)) {
- /*
- * Check if this is the last buffer to read.
- */
- if (read && fileio->read_once && fileio->dq_count == 1) {
- dprintk(3, "read limit reached\n");
- return __vb2_cleanup_fileio(q);
- }
-
- /*
- * Call vb2_qbuf and give buffer to the driver.
- */
- memset(&fileio->b, 0, sizeof(fileio->b));
- fileio->b.type = q->type;
- fileio->b.memory = q->memory;
- fileio->b.index = index;
- fileio->b.bytesused = buf->pos;
- if (is_multiplanar) {
- memset(&fileio->p, 0, sizeof(fileio->p));
- fileio->p.bytesused = buf->pos;
- fileio->b.m.planes = &fileio->p;
- fileio->b.length = 1;
- }
- if (set_timestamp)
- v4l2_get_timestamp(&fileio->b.timestamp);
- ret = vb2_internal_qbuf(q, &fileio->b);
- dprintk(5, "vb2_dbuf result: %d\n", ret);
- if (ret)
- return ret;
-
- /*
- * Buffer has been queued, update the status
- */
- buf->pos = 0;
- buf->queued = 1;
- buf->size = vb2_plane_size(q->bufs[index], 0);
- fileio->q_count += 1;
- /*
- * If we are queuing up buffers for the first time, then
- * increase initial_index by one.
- */
- if (fileio->initial_index < q->num_buffers)
- fileio->initial_index++;
- /*
- * The next buffer to use is either a buffer that's going to be
- * queued for the first time (initial_index < q->num_buffers)
- * or it is equal to q->num_buffers, meaning that the next
- * time we need to dequeue a buffer since we've now queued up
- * all the 'first time' buffers.
- */
- fileio->cur_index = fileio->initial_index;
- }
-
- /*
- * Return proper number of bytes processed.
- */
- if (ret == 0)
- ret = count;
- return ret;
-}
-
-size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count,
- loff_t *ppos, int nonblocking)
-{
- return __vb2_perform_fileio(q, data, count, ppos, nonblocking, 1);
-}
-EXPORT_SYMBOL_GPL(vb2_read);
-
-size_t vb2_write(struct vb2_queue *q, const char __user *data, size_t count,
- loff_t *ppos, int nonblocking)
-{
- return __vb2_perform_fileio(q, (char __user *) data, count,
- ppos, nonblocking, 0);
-}
-EXPORT_SYMBOL_GPL(vb2_write);
-
-struct vb2_threadio_data {
- struct task_struct *thread;
- vb2_thread_fnc fnc;
- void *priv;
- bool stop;
-};
-
-static int vb2_thread(void *data)
-{
- struct vb2_queue *q = data;
- struct vb2_threadio_data *threadio = q->threadio;
- struct vb2_fileio_data *fileio = q->fileio;
- bool set_timestamp = false;
- int prequeue = 0;
- int index = 0;
- int ret = 0;
-
- if (V4L2_TYPE_IS_OUTPUT(q->type)) {
- prequeue = q->num_buffers;
- set_timestamp =
- (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
- V4L2_BUF_FLAG_TIMESTAMP_COPY;
- }
-
- set_freezable();
-
- for (;;) {
- struct vb2_buffer *vb;
-
- /*
- * Call vb2_dqbuf to get buffer back.
- */
- memset(&fileio->b, 0, sizeof(fileio->b));
- fileio->b.type = q->type;
- fileio->b.memory = q->memory;
- if (prequeue) {
- fileio->b.index = index++;
- prequeue--;
- } else {
- call_void_qop(q, wait_finish, q);
- if (!threadio->stop)
- ret = vb2_internal_dqbuf(q, &fileio->b, 0);
- call_void_qop(q, wait_prepare, q);
- dprintk(5, "file io: vb2_dqbuf result: %d\n", ret);
- }
- if (ret || threadio->stop)
- break;
- try_to_freeze();
-
- vb = q->bufs[fileio->b.index];
- if (!(fileio->b.flags & V4L2_BUF_FLAG_ERROR))
- if (threadio->fnc(vb, threadio->priv))
- break;
- call_void_qop(q, wait_finish, q);
- if (set_timestamp)
- v4l2_get_timestamp(&fileio->b.timestamp);
- if (!threadio->stop)
- ret = vb2_internal_qbuf(q, &fileio->b);
- call_void_qop(q, wait_prepare, q);
- if (ret || threadio->stop)
- break;
- }
-
- /* Hmm, linux becomes *very* unhappy without this ... */
- while (!kthread_should_stop()) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule();
- }
- return 0;
-}
-
-/*
- * This function should not be used for anything else but the videobuf2-dvb
- * support. If you think you have another good use-case for this, then please
- * contact the linux-media mailinglist first.
- */
-int vb2_thread_start(struct vb2_queue *q, vb2_thread_fnc fnc, void *priv,
- const char *thread_name)
-{
- struct vb2_threadio_data *threadio;
- int ret = 0;
-
- if (q->threadio)
- return -EBUSY;
- if (vb2_is_busy(q))
- return -EBUSY;
- if (WARN_ON(q->fileio))
- return -EBUSY;
-
- threadio = kzalloc(sizeof(*threadio), GFP_KERNEL);
- if (threadio == NULL)
- return -ENOMEM;
- threadio->fnc = fnc;
- 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);
- if (ret)
- goto nomem;
- q->threadio = threadio;
- threadio->thread = kthread_run(vb2_thread, q, "vb2-%s", thread_name);
- if (IS_ERR(threadio->thread)) {
- ret = PTR_ERR(threadio->thread);
- threadio->thread = NULL;
- goto nothread;
- }
- return 0;
-
-nothread:
- __vb2_cleanup_fileio(q);
-nomem:
- kfree(threadio);
- return ret;
-}
-EXPORT_SYMBOL_GPL(vb2_thread_start);
-
-int vb2_thread_stop(struct vb2_queue *q)
-{
- struct vb2_threadio_data *threadio = q->threadio;
- int err;
-
- if (threadio == NULL)
- return 0;
- threadio->stop = true;
- /* Wake up all pending sleeps in the thread */
- vb2_queue_error(q);
- err = kthread_stop(threadio->thread);
- __vb2_cleanup_fileio(q);
- threadio->thread = NULL;
- kfree(threadio);
- q->threadio = NULL;
- return err;
-}
-EXPORT_SYMBOL_GPL(vb2_thread_stop);
-
-/*
- * The following functions are not part of the vb2 core API, but are helper
- * functions that plug into struct v4l2_ioctl_ops, struct v4l2_file_operations
- * and struct vb2_ops.
- * They contain boilerplate code that most if not all drivers have to do
- * and so they simplify the driver code.
- */
-
-/* The queue is busy if there is a owner and you are not that owner. */
-static inline bool vb2_queue_is_busy(struct video_device *vdev, struct file *file)
-{
- return vdev->queue->owner && vdev->queue->owner != file->private_data;
-}
-
-/* vb2 ioctl helpers */
-
-int vb2_ioctl_reqbufs(struct file *file, void *priv,
- struct v4l2_requestbuffers *p)
-{
- struct video_device *vdev = video_devdata(file);
- int res = __verify_memory_type(vdev->queue, p->memory, p->type);
-
- if (res)
- return res;
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- res = __reqbufs(vdev->queue, p);
- /* 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)
- vdev->queue->owner = p->count ? file->private_data : NULL;
- return res;
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_reqbufs);
-
-int vb2_ioctl_create_bufs(struct file *file, void *priv,
- struct v4l2_create_buffers *p)
-{
- struct video_device *vdev = video_devdata(file);
- int res = __verify_memory_type(vdev->queue, p->memory, p->format.type);
-
- p->index = vdev->queue->num_buffers;
- /* If count == 0, then just check if memory and type are valid.
- Any -EBUSY result from __verify_memory_type can be mapped to 0. */
- if (p->count == 0)
- return res != -EBUSY ? res : 0;
- if (res)
- return res;
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- res = __create_bufs(vdev->queue, p);
- if (res == 0)
- vdev->queue->owner = file->private_data;
- return res;
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_create_bufs);
-
-int vb2_ioctl_prepare_buf(struct file *file, void *priv,
- struct v4l2_buffer *p)
-{
- struct video_device *vdev = video_devdata(file);
-
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- return vb2_prepare_buf(vdev->queue, p);
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_prepare_buf);
-
-int vb2_ioctl_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
-{
- struct video_device *vdev = video_devdata(file);
-
- /* No need to call vb2_queue_is_busy(), anyone can query buffers. */
- return vb2_querybuf(vdev->queue, p);
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_querybuf);
-
-int vb2_ioctl_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
-{
- struct video_device *vdev = video_devdata(file);
-
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- return vb2_qbuf(vdev->queue, p);
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_qbuf);
-
-int vb2_ioctl_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
-{
- struct video_device *vdev = video_devdata(file);
-
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- return vb2_dqbuf(vdev->queue, p, file->f_flags & O_NONBLOCK);
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_dqbuf);
-
-int vb2_ioctl_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
-{
- struct video_device *vdev = video_devdata(file);
-
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- return vb2_streamon(vdev->queue, i);
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_streamon);
-
-int vb2_ioctl_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
-{
- struct video_device *vdev = video_devdata(file);
-
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- return vb2_streamoff(vdev->queue, i);
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_streamoff);
-
-int vb2_ioctl_expbuf(struct file *file, void *priv, struct v4l2_exportbuffer *p)
-{
- struct video_device *vdev = video_devdata(file);
-
- if (vb2_queue_is_busy(vdev, file))
- return -EBUSY;
- return vb2_expbuf(vdev->queue, p);
-}
-EXPORT_SYMBOL_GPL(vb2_ioctl_expbuf);
-
-/* v4l2_file_operations helpers */
-
-int vb2_fop_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct video_device *vdev = video_devdata(file);
-
- return vb2_mmap(vdev->queue, vma);
-}
-EXPORT_SYMBOL_GPL(vb2_fop_mmap);
-
-int _vb2_fop_release(struct file *file, struct mutex *lock)
-{
- struct video_device *vdev = video_devdata(file);
-
- if (lock)
- mutex_lock(lock);
- if (file->private_data == vdev->queue->owner) {
- vb2_queue_release(vdev->queue);
- vdev->queue->owner = NULL;
- }
- if (lock)
- mutex_unlock(lock);
- return v4l2_fh_release(file);
-}
-EXPORT_SYMBOL_GPL(_vb2_fop_release);
-
-int vb2_fop_release(struct file *file)
-{
- struct video_device *vdev = video_devdata(file);
- struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
-
- return _vb2_fop_release(file, lock);
-}
-EXPORT_SYMBOL_GPL(vb2_fop_release);
-
-ssize_t vb2_fop_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct video_device *vdev = video_devdata(file);
- struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
- int err = -EBUSY;
-
- if (!(vdev->queue->io_modes & VB2_WRITE))
- return -EINVAL;
- if (lock && mutex_lock_interruptible(lock))
- return -ERESTARTSYS;
- if (vb2_queue_is_busy(vdev, file))
- goto exit;
- err = vb2_write(vdev->queue, buf, count, ppos,
- file->f_flags & O_NONBLOCK);
- if (vdev->queue->fileio)
- vdev->queue->owner = file->private_data;
-exit:
- if (lock)
- mutex_unlock(lock);
- return err;
-}
-EXPORT_SYMBOL_GPL(vb2_fop_write);
-
-ssize_t vb2_fop_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct video_device *vdev = video_devdata(file);
- struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
- int err = -EBUSY;
-
- if (!(vdev->queue->io_modes & VB2_READ))
- return -EINVAL;
- if (lock && mutex_lock_interruptible(lock))
- return -ERESTARTSYS;
- if (vb2_queue_is_busy(vdev, file))
- goto exit;
- err = vb2_read(vdev->queue, buf, count, ppos,
- file->f_flags & O_NONBLOCK);
- if (vdev->queue->fileio)
- vdev->queue->owner = file->private_data;
-exit:
- if (lock)
- mutex_unlock(lock);
- return err;
-}
-EXPORT_SYMBOL_GPL(vb2_fop_read);
-
-unsigned int vb2_fop_poll(struct file *file, poll_table *wait)
-{
- struct video_device *vdev = video_devdata(file);
- struct vb2_queue *q = vdev->queue;
- struct mutex *lock = q->lock ? q->lock : vdev->lock;
- unsigned res;
- void *fileio;
-
- /*
- * If this helper doesn't know how to lock, then you shouldn't be using
- * it but you should write your own.
- */
- WARN_ON(!lock);
-
- if (lock && mutex_lock_interruptible(lock))
- return POLLERR;
-
- fileio = q->fileio;
-
- res = vb2_poll(vdev->queue, file, wait);
-
- /* If fileio was started, then we have a new queue owner. */
- if (!fileio && q->fileio)
- q->owner = file->private_data;
- if (lock)
- mutex_unlock(lock);
- return res;
-}
-EXPORT_SYMBOL_GPL(vb2_fop_poll);
-
-#ifndef CONFIG_MMU
-unsigned long vb2_fop_get_unmapped_area(struct file *file, unsigned long addr,
- unsigned long len, unsigned long pgoff, unsigned long flags)
-{
- struct video_device *vdev = video_devdata(file);
-
- return vb2_get_unmapped_area(vdev->queue, addr, len, pgoff, flags);
-}
-EXPORT_SYMBOL_GPL(vb2_fop_get_unmapped_area);
-#endif
-
-/* vb2_ops helpers. Only use if vq->lock is non-NULL. */
-
-void vb2_ops_wait_prepare(struct vb2_queue *vq)
-{
- mutex_unlock(vq->lock);
-}
-EXPORT_SYMBOL_GPL(vb2_ops_wait_prepare);
-
-void vb2_ops_wait_finish(struct vb2_queue *vq)
-{
- mutex_lock(vq->lock);
-}
-EXPORT_SYMBOL_GPL(vb2_ops_wait_finish);
+EXPORT_SYMBOL_GPL(vb2_core_queue_release);
MODULE_DESCRIPTION("Driver helper framework for Video for Linux 2");
MODULE_AUTHOR("Pawel Osciak <pawel@osciak.com>, Marek Szyprowski");
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 2397ceb1dc6b..c33127284cfe 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-core.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>
#include <media/videobuf2-memops.h>
@@ -100,7 +100,8 @@ static void vb2_dc_prepare(void *buf_priv)
if (!sgt || buf->db_attach)
return;
- dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
+ dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->orig_nents,
+ buf->dma_dir);
}
static void vb2_dc_finish(void *buf_priv)
@@ -112,7 +113,7 @@ static void vb2_dc_finish(void *buf_priv)
if (!sgt || buf->db_attach)
return;
- dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
+ dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir);
}
/*********************************************/
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index be7bd6535c9d..9985c89f0513 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-core.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-memops.h>
#include <media/videobuf2-dma-sg.h>
@@ -210,7 +210,8 @@ static void vb2_dma_sg_prepare(void *buf_priv)
if (buf->db_attach)
return;
- dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
+ dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->orig_nents,
+ buf->dma_dir);
}
static void vb2_dma_sg_finish(void *buf_priv)
@@ -222,7 +223,7 @@ static void vb2_dma_sg_finish(void *buf_priv)
if (buf->db_attach)
return;
- dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
+ dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir);
}
static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr,
diff --git a/drivers/media/v4l2-core/videobuf2-internal.h b/drivers/media/v4l2-core/videobuf2-internal.h
new file mode 100644
index 000000000000..79018c749282
--- /dev/null
+++ b/drivers/media/v4l2-core/videobuf2-internal.h
@@ -0,0 +1,161 @@
+#ifndef _MEDIA_VIDEOBUF2_INTERNAL_H
+#define _MEDIA_VIDEOBUF2_INTERNAL_H
+
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <media/videobuf2-core.h>
+
+extern int vb2_debug;
+
+#define dprintk(level, fmt, arg...) \
+ do { \
+ if (vb2_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, (vb)->index, #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, (vb)->index, #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
+
+#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; \
+})
+
+bool vb2_buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb);
+int vb2_verify_memory_type(struct vb2_queue *q,
+ enum vb2_memory memory, unsigned int type);
+#endif /* _MEDIA_VIDEOBUF2_INTERNAL_H */
diff --git a/drivers/media/v4l2-core/videobuf2-memops.c b/drivers/media/v4l2-core/videobuf2-memops.c
index 48c6a49c4928..dbec5923fcf0 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-core.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-memops.h>
/**
diff --git a/drivers/media/v4l2-core/videobuf2-v4l2.c b/drivers/media/v4l2-core/videobuf2-v4l2.c
new file mode 100644
index 000000000000..27b4b9e7c0c2
--- /dev/null
+++ b/drivers/media/v4l2-core/videobuf2-v4l2.c
@@ -0,0 +1,1661 @@
+/*
+ * videobuf2-v4l2.c - V4L2 driver helper framework
+ *
+ * Copyright (C) 2010 Samsung Electronics
+ *
+ * Author: Pawel Osciak <pawel@osciak.com>
+ * Marek Szyprowski <m.szyprowski@samsung.com>
+ *
+ * The vb2_thread implementation was based on code from videobuf-dvb.c:
+ * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [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/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-common.h>
+
+#include <media/videobuf2-v4l2.h>
+
+#include "videobuf2-internal.h"
+
+/* 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 | \
+ V4L2_BUF_FLAG_PREPARED | \
+ V4L2_BUF_FLAG_TIMESTAMP_MASK)
+/* Output buffer flags that should be passed on to the driver */
+#define V4L2_BUFFER_OUT_FLAGS (V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_BFRAME | \
+ V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_TIMECODE)
+
+/**
+ * __verify_planes_array() - 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)
+{
+ 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 "
+ "planes array not provided\n");
+ return -EINVAL;
+ }
+
+ if (b->length < vb->num_planes || b->length > VB2_MAX_PLANES) {
+ dprintk(1, "incorrect planes array length, "
+ "expected %d, got %d\n", vb->num_planes, b->length);
+ return -EINVAL;
+ }
+
+ 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, const struct v4l2_buffer *b)
+{
+ 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 == VB2_MEMORY_USERPTR ||
+ b->memory == VB2_MEMORY_DMABUF)
+ ? b->m.planes[plane].length
+ : vb->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 == VB2_MEMORY_USERPTR)
+ ? b->length : vb->planes[0].length;
+
+ if (b->bytesused > length)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int __set_timestamp(struct vb2_buffer *vb, const void *pb)
+{
+ const struct v4l2_buffer *b = pb;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct vb2_queue *q = vb->vb2_queue;
+
+ if (q->is_output) {
+ /*
+ * 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->timestamp = b->timestamp;
+ vbuf->flags |= b->flags & V4L2_BUF_FLAG_TIMECODE;
+ if (b->flags & V4L2_BUF_FLAG_TIMECODE)
+ vbuf->timecode = b->timecode;
+ }
+ return 0;
+};
+
+static void vb2_warn_zero_bytesused(struct vb2_buffer *vb)
+{
+ static bool check_once;
+
+ if (check_once)
+ return;
+
+ check_once = true;
+ WARN_ON(1);
+
+ pr_warn("use of bytesused == 0 is deprecated and will be removed in the future,\n");
+ if (vb->vb2_queue->allow_zero_bytesused)
+ pr_warn("use VIDIOC_DECODER_CMD(V4L2_DEC_CMD_STOP) instead.\n");
+ else
+ pr_warn("use the actual size instead.\n");
+}
+
+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);
+}
+
+/**
+ * __fill_v4l2_buffer() - fill in a struct v4l2_buffer with information to be
+ * returned to userspace
+ */
+static int __fill_v4l2_buffer(struct vb2_buffer *vb, void *pb)
+{
+ struct v4l2_buffer *b = pb;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct vb2_queue *q = vb->vb2_queue;
+ unsigned int plane;
+
+ /* Copy back data such as timestamp, flags, etc. */
+ b->index = vb->index;
+ b->type = vb->type;
+ b->memory = vb->memory;
+ b->bytesused = 0;
+
+ b->flags = vbuf->flags;
+ b->field = vbuf->field;
+ b->timestamp = vbuf->timestamp;
+ b->timecode = vbuf->timecode;
+ b->sequence = vbuf->sequence;
+ b->reserved2 = 0;
+ b->reserved = 0;
+
+ if (q->is_multiplanar) {
+ /*
+ * Fill in plane-related data if userspace provided an array
+ * for it. The caller has already verified memory and size.
+ */
+ b->length = vb->num_planes;
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ struct v4l2_plane *pdst = &b->m.planes[plane];
+ struct vb2_plane *psrc = &vb->planes[plane];
+
+ pdst->bytesused = psrc->bytesused;
+ pdst->length = psrc->length;
+ if (q->memory == VB2_MEMORY_MMAP)
+ pdst->m.mem_offset = psrc->m.offset;
+ else if (q->memory == VB2_MEMORY_USERPTR)
+ pdst->m.userptr = psrc->m.userptr;
+ else if (q->memory == VB2_MEMORY_DMABUF)
+ pdst->m.fd = psrc->m.fd;
+ pdst->data_offset = psrc->data_offset;
+ memset(pdst->reserved, 0, sizeof(pdst->reserved));
+ }
+ } else {
+ /*
+ * We use length and offset in v4l2_planes array even for
+ * single-planar buffers, but userspace does not.
+ */
+ b->length = vb->planes[0].length;
+ b->bytesused = vb->planes[0].bytesused;
+ if (q->memory == VB2_MEMORY_MMAP)
+ b->m.offset = vb->planes[0].m.offset;
+ else if (q->memory == VB2_MEMORY_USERPTR)
+ b->m.userptr = vb->planes[0].m.userptr;
+ else if (q->memory == VB2_MEMORY_DMABUF)
+ b->m.fd = vb->planes[0].m.fd;
+ }
+
+ /*
+ * Clear any buffer state related flags.
+ */
+ b->flags &= ~V4L2_BUFFER_MASK_FLAGS;
+ b->flags |= q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK;
+ if ((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) !=
+ V4L2_BUF_FLAG_TIMESTAMP_COPY) {
+ /*
+ * For non-COPY timestamps, drop timestamp source bits
+ * and obtain the timestamp source from the queue.
+ */
+ b->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+ b->flags |= q->timestamp_flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+ }
+
+ switch (vb->state) {
+ case VB2_BUF_STATE_QUEUED:
+ case VB2_BUF_STATE_ACTIVE:
+ b->flags |= V4L2_BUF_FLAG_QUEUED;
+ break;
+ case VB2_BUF_STATE_ERROR:
+ b->flags |= V4L2_BUF_FLAG_ERROR;
+ /* fall through */
+ case VB2_BUF_STATE_DONE:
+ b->flags |= V4L2_BUF_FLAG_DONE;
+ break;
+ case VB2_BUF_STATE_PREPARED:
+ b->flags |= V4L2_BUF_FLAG_PREPARED;
+ break;
+ case VB2_BUF_STATE_PREPARING:
+ case VB2_BUF_STATE_DEQUEUED:
+ case VB2_BUF_STATE_REQUEUEING:
+ /* nothing */
+ break;
+ }
+
+ if (vb2_buffer_in_use(q, vb))
+ b->flags |= V4L2_BUF_FLAG_MAPPED;
+
+ return 0;
+}
+
+/**
+ * __fill_vb2_buffer() - fill a vb2_buffer with information provided in a
+ * v4l2_buffer by the userspace. It also verifies that struct
+ * v4l2_buffer has a valid number of planes.
+ */
+static int __fill_vb2_buffer(struct vb2_buffer *vb,
+ const void *pb, struct vb2_plane *planes)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ const struct v4l2_buffer *b = pb;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ unsigned int plane;
+ int ret;
+
+ ret = __verify_length(vb, b);
+ if (ret < 0) {
+ dprintk(1, "plane parameters verification failed: %d\n", ret);
+ return ret;
+ }
+ if (b->field == V4L2_FIELD_ALTERNATE && q->is_output) {
+ /*
+ * If the format's field is ALTERNATE, then the buffer's field
+ * should be either TOP or BOTTOM, not ALTERNATE since that
+ * makes no sense. The driver has to know whether the
+ * buffer represents a top or a bottom field in order to
+ * program any DMA correctly. Using ALTERNATE is wrong, since
+ * 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");
+ return -EINVAL;
+ }
+ vbuf->timestamp.tv_sec = 0;
+ vbuf->timestamp.tv_usec = 0;
+ vbuf->sequence = 0;
+
+ if (V4L2_TYPE_IS_MULTIPLANAR(b->type)) {
+ if (b->memory == VB2_MEMORY_USERPTR) {
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ planes[plane].m.userptr =
+ b->m.planes[plane].m.userptr;
+ planes[plane].length =
+ b->m.planes[plane].length;
+ }
+ }
+ if (b->memory == VB2_MEMORY_DMABUF) {
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ planes[plane].m.fd =
+ b->m.planes[plane].m.fd;
+ planes[plane].length =
+ b->m.planes[plane].length;
+ }
+ }
+
+ /* Fill in driver-provided information for OUTPUT types */
+ if (V4L2_TYPE_IS_OUTPUT(b->type)) {
+ /*
+ * Will have to go up to b->length when API starts
+ * accepting variable number of planes.
+ *
+ * If bytesused == 0 for the output buffer, then fall
+ * back to the full buffer size. In that case
+ * userspace clearly never bothered to set it and
+ * it's a safe assumption that they really meant to
+ * use the full plane sizes.
+ *
+ * Some drivers, e.g. old codec drivers, use bytesused == 0
+ * as a way to indicate that streaming is finished.
+ * In that case, the driver should use the
+ * allow_zero_bytesused flag to keep old userspace
+ * applications working.
+ */
+ for (plane = 0; plane < vb->num_planes; ++plane) {
+ struct vb2_plane *pdst = &planes[plane];
+ struct v4l2_plane *psrc = &b->m.planes[plane];
+
+ if (psrc->bytesused == 0)
+ vb2_warn_zero_bytesused(vb);
+
+ if (vb->vb2_queue->allow_zero_bytesused)
+ pdst->bytesused = psrc->bytesused;
+ else
+ pdst->bytesused = psrc->bytesused ?
+ psrc->bytesused : pdst->length;
+ pdst->data_offset = psrc->data_offset;
+ }
+ }
+ } else {
+ /*
+ * Single-planar buffers do not use planes array,
+ * so fill in relevant v4l2_buffer struct fields instead.
+ * In videobuf we use our internal V4l2_planes struct for
+ * single-planar buffers as well, for simplicity.
+ *
+ * If bytesused == 0 for the output buffer, then fall back
+ * to the full buffer size as that's a sensible default.
+ *
+ * Some drivers, e.g. old codec drivers, use bytesused == 0 as
+ * a way to indicate that streaming is finished. In that case,
+ * the driver should use the allow_zero_bytesused flag to keep
+ * old userspace applications working.
+ */
+ if (b->memory == VB2_MEMORY_USERPTR) {
+ planes[0].m.userptr = b->m.userptr;
+ planes[0].length = b->length;
+ }
+
+ if (b->memory == VB2_MEMORY_DMABUF) {
+ planes[0].m.fd = b->m.fd;
+ planes[0].length = b->length;
+ }
+
+ if (V4L2_TYPE_IS_OUTPUT(b->type)) {
+ if (b->bytesused == 0)
+ vb2_warn_zero_bytesused(vb);
+
+ if (vb->vb2_queue->allow_zero_bytesused)
+ planes[0].bytesused = b->bytesused;
+ else
+ planes[0].bytesused = b->bytesused ?
+ b->bytesused : planes[0].length;
+ } else
+ planes[0].bytesused = 0;
+
+ }
+
+ /* Zero flags that the vb2 core handles */
+ vbuf->flags = b->flags & ~V4L2_BUFFER_MASK_FLAGS;
+ if ((vb->vb2_queue->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) !=
+ V4L2_BUF_FLAG_TIMESTAMP_COPY || !V4L2_TYPE_IS_OUTPUT(b->type)) {
+ /*
+ * Non-COPY timestamps and non-OUTPUT queues will get
+ * their timestamp and timestamp source flags from the
+ * queue.
+ */
+ vbuf->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->flags &= ~V4L2_BUF_FLAG_TIMECODE;
+ vbuf->field = b->field;
+ } else {
+ /* Zero any output buffer flags as this is a capture buffer */
+ vbuf->flags &= ~V4L2_BUFFER_OUT_FLAGS;
+ }
+
+ return 0;
+}
+
+static const struct vb2_buf_ops v4l2_buf_ops = {
+ .fill_user_buffer = __fill_v4l2_buffer,
+ .fill_vb2_buffer = __fill_vb2_buffer,
+ .set_timestamp = __set_timestamp,
+};
+
+/**
+ * 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);
+
+ return ret ? ret : vb2_core_querybuf(q, b->index, b);
+}
+EXPORT_SYMBOL(vb2_querybuf);
+
+/**
+ * vb2_reqbufs() - Wrapper for vb2_core_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 = vb2_verify_memory_type(q, req->memory, req->type);
+
+ return ret ? ret : vb2_core_reqbufs(q, req->memory, &req->count);
+}
+EXPORT_SYMBOL_GPL(vb2_reqbufs);
+
+/**
+ * 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)
+{
+ 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");
+
+ return ret ? ret : vb2_core_prepare_buf(q, b->index, b);
+}
+EXPORT_SYMBOL_GPL(vb2_prepare_buf);
+
+/**
+ * vb2_create_bufs() - Wrapper for vb2_core_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 = vb2_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 : vb2_core_create_bufs(q, create->memory,
+ &create->count, &create->format);
+}
+EXPORT_SYMBOL_GPL(vb2_create_bufs);
+
+static int vb2_internal_qbuf(struct vb2_queue *q, struct v4l2_buffer *b)
+{
+ int ret = vb2_queue_or_prepare_buf(q, b, "qbuf");
+
+ return ret ? ret : vb2_core_qbuf(q, b->index, b);
+}
+
+/**
+ * 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)
+{
+ if (vb2_fileio_is_active(q)) {
+ dprintk(1, "file io in progress\n");
+ return -EBUSY;
+ }
+
+ return vb2_internal_qbuf(q, b);
+}
+EXPORT_SYMBOL_GPL(vb2_qbuf);
+
+static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b,
+ bool nonblocking)
+{
+ int ret;
+
+ if (b->type != q->type) {
+ dprintk(1, "invalid buffer type\n");
+ return -EINVAL;
+ }
+
+ ret = vb2_core_dqbuf(q, b, nonblocking);
+
+ if (!ret && !q->is_output &&
+ b->flags & V4L2_BUF_FLAG_LAST)
+ q->last_buffer_dequeued = true;
+
+ return ret;
+}
+
+/**
+ * vb2_dqbuf() - Dequeue a buffer to the userspace
+ * @q: videobuf2 queue
+ * @b: buffer structure passed from userspace to vidioc_dqbuf handler
+ * in driver
+ * @nonblocking: if true, this call will not sleep waiting for a buffer if no
+ * buffers ready for dequeuing are present. Normally the driver
+ * would be passing (file->f_flags & O_NONBLOCK) here
+ *
+ * Should be called from vidioc_dqbuf ioctl handler of a driver.
+ * This function:
+ * 1) verifies the passed buffer,
+ * 2) calls buf_finish callback in the driver (if provided), in which
+ * driver can perform any additional operations that may be required before
+ * returning the buffer to userspace, such as cache sync,
+ * 3) the buffer struct members are filled with relevant information for
+ * the userspace.
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_dqbuf handler in driver.
+ */
+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");
+ return -EBUSY;
+ }
+ return vb2_internal_dqbuf(q, b, nonblocking);
+}
+EXPORT_SYMBOL_GPL(vb2_dqbuf);
+
+/**
+ * vb2_streamon - start streaming
+ * @q: videobuf2 queue
+ * @type: type argument passed from userspace to vidioc_streamon handler
+ *
+ * Should be called from vidioc_streamon handler of a driver.
+ * This function:
+ * 1) verifies current state
+ * 2) passes any previously queued buffers to the driver and starts streaming
+ *
+ * The return values from this function are intended to be directly returned
+ * from vidioc_streamon handler in the driver.
+ */
+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");
+ return -EBUSY;
+ }
+ return vb2_core_streamon(q, type);
+}
+EXPORT_SYMBOL_GPL(vb2_streamon);
+
+/**
+ * vb2_streamoff - stop streaming
+ * @q: videobuf2 queue
+ * @type: type argument passed from userspace to vidioc_streamoff handler
+ *
+ * Should be called from vidioc_streamoff handler of a driver.
+ * This function:
+ * 1) verifies current state,
+ * 2) stop streaming and dequeues any queued buffers, including those previously
+ * passed to the driver (after waiting for the driver to finish).
+ *
+ * This call can be used for pausing playback.
+ * The return values from this function are intended to be directly returned
+ * from vidioc_streamoff handler in the driver
+ */
+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");
+ return -EBUSY;
+ }
+ return vb2_core_streamoff(q, type);
+}
+EXPORT_SYMBOL_GPL(vb2_streamoff);
+
+/**
+ * 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)
+{
+ return vb2_core_expbuf(q, &eb->fd, eb->type, eb->index,
+ eb->plane, eb->flags);
+}
+EXPORT_SYMBOL_GPL(vb2_expbuf);
+
+/**
+ * vb2_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-core.h
+ * for more information.
+ */
+int vb2_queue_init(struct vb2_queue *q)
+{
+ /*
+ * Sanity check
+ */
+ if (WARN_ON(!q) ||
+ WARN_ON(q->timestamp_flags &
+ ~(V4L2_BUF_FLAG_TIMESTAMP_MASK |
+ V4L2_BUF_FLAG_TSTAMP_SRC_MASK)))
+ return -EINVAL;
+
+ /* Warn that the driver should choose an appropriate timestamp type */
+ WARN_ON((q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
+ V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN);
+
+ /* Warn that vb2_memory should match with v4l2_memory */
+ if (WARN_ON(VB2_MEMORY_MMAP != (int)V4L2_MEMORY_MMAP)
+ || WARN_ON(VB2_MEMORY_USERPTR != (int)V4L2_MEMORY_USERPTR)
+ || WARN_ON(VB2_MEMORY_DMABUF != (int)V4L2_MEMORY_DMABUF))
+ return -EINVAL;
+
+ if (q->buf_struct_size == 0)
+ q->buf_struct_size = sizeof(struct vb2_v4l2_buffer);
+
+ q->buf_ops = &v4l2_buf_ops;
+ q->is_multiplanar = V4L2_TYPE_IS_MULTIPLANAR(q->type);
+ q->is_output = V4L2_TYPE_IS_OUTPUT(q->type);
+
+ return vb2_core_queue_init(q);
+}
+EXPORT_SYMBOL_GPL(vb2_queue_init);
+
+static int __vb2_init_fileio(struct vb2_queue *q, int read);
+static int __vb2_cleanup_fileio(struct vb2_queue *q);
+
+/**
+ * vb2_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_queue_release(struct vb2_queue *q)
+{
+ __vb2_cleanup_fileio(q);
+ vb2_core_queue_release(q);
+}
+EXPORT_SYMBOL_GPL(vb2_queue_release);
+
+/**
+ * vb2_poll() - implements poll userspace operation
+ * @q: videobuf2 queue
+ * @file: file argument passed to the poll file operation handler
+ * @wait: wait argument passed to the poll file operation handler
+ *
+ * This function implements poll file operation handler for a driver.
+ * For CAPTURE queues, if a buffer is ready to be dequeued, the userspace will
+ * be informed that the file descriptor of a video device is available for
+ * reading.
+ * For OUTPUT queues, if a buffer is ready to be dequeued, the file descriptor
+ * will be reported as available for writing.
+ *
+ * If the driver uses struct v4l2_fh, then vb2_poll() will also check for any
+ * pending events.
+ *
+ * The return values from this function are intended to be directly returned
+ * from poll handler in driver.
+ */
+unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait)
+{
+ struct video_device *vfd = video_devdata(file);
+ unsigned long req_events = poll_requested_events(wait);
+ struct vb2_buffer *vb = NULL;
+ unsigned int res = 0;
+ unsigned long flags;
+
+ if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
+ struct v4l2_fh *fh = file->private_data;
+
+ if (v4l2_event_pending(fh))
+ res = POLLPRI;
+ else if (req_events & POLLPRI)
+ poll_wait(file, &fh->wait, wait);
+ }
+
+ if (!q->is_output && !(req_events & (POLLIN | POLLRDNORM)))
+ return res;
+ if (q->is_output && !(req_events & (POLLOUT | POLLWRNORM)))
+ return res;
+
+ /*
+ * Start file I/O emulator only if streaming API has not been used yet.
+ */
+ if (q->num_buffers == 0 && !vb2_fileio_is_active(q)) {
+ if (!q->is_output && (q->io_modes & VB2_READ) &&
+ (req_events & (POLLIN | POLLRDNORM))) {
+ if (__vb2_init_fileio(q, 1))
+ return res | POLLERR;
+ }
+ if (q->is_output && (q->io_modes & VB2_WRITE) &&
+ (req_events & (POLLOUT | POLLWRNORM))) {
+ if (__vb2_init_fileio(q, 0))
+ return res | POLLERR;
+ /*
+ * Write to OUTPUT queue can be done immediately.
+ */
+ return res | POLLOUT | POLLWRNORM;
+ }
+ }
+
+ /*
+ * There is nothing to wait for if the queue isn't streaming, or if the
+ * error flag is set.
+ */
+ if (!vb2_is_streaming(q) || q->error)
+ return res | POLLERR;
+ /*
+ * For compatibility with vb1: if QBUF hasn't been called yet, then
+ * return POLLERR as well. This only affects capture queues, output
+ * queues will always initialize waiting_for_buffers to false.
+ */
+ if (q->waiting_for_buffers)
+ return res | POLLERR;
+
+ /*
+ * For output streams you can write as long as there are fewer buffers
+ * queued than there are buffers available.
+ */
+ if (q->is_output && q->queued_count < q->num_buffers)
+ return res | POLLOUT | POLLWRNORM;
+
+ if (list_empty(&q->done_list)) {
+ /*
+ * If the last buffer was dequeued from a capture queue,
+ * return immediately. DQBUF will return -EPIPE.
+ */
+ if (q->last_buffer_dequeued)
+ return res | POLLIN | POLLRDNORM;
+
+ poll_wait(file, &q->done_wq, wait);
+ }
+
+ /*
+ * Take first buffer available for dequeuing.
+ */
+ spin_lock_irqsave(&q->done_lock, flags);
+ if (!list_empty(&q->done_list))
+ vb = list_first_entry(&q->done_list, struct vb2_buffer,
+ done_entry);
+ spin_unlock_irqrestore(&q->done_lock, flags);
+
+ if (vb && (vb->state == VB2_BUF_STATE_DONE
+ || vb->state == VB2_BUF_STATE_ERROR)) {
+ return (q->is_output) ?
+ res | POLLOUT | POLLWRNORM :
+ res | POLLIN | POLLRDNORM;
+ }
+ return res;
+}
+EXPORT_SYMBOL_GPL(vb2_poll);
+
+/**
+ * struct vb2_fileio_buf - buffer context used by file io emulator
+ *
+ * vb2 provides a compatibility layer and emulator of file io (read and
+ * write) calls on top of streaming API. This structure is used for
+ * tracking context related to the buffers.
+ */
+struct vb2_fileio_buf {
+ void *vaddr;
+ unsigned int size;
+ unsigned int pos;
+ unsigned int queued:1;
+};
+
+/**
+ * struct vb2_fileio_data - queue context used by file io emulator
+ *
+ * @cur_index: the index of the buffer currently being read from or
+ * written to. If equal to q->num_buffers then a new buffer
+ * must be dequeued.
+ * @initial_index: in the read() case all buffers are queued up immediately
+ * in __vb2_init_fileio() and __vb2_perform_fileio() just cycles
+ * buffers. However, in the write() case no buffers are initially
+ * queued, instead whenever a buffer is full it is queued up by
+ * __vb2_perform_fileio(). Only once all available buffers have
+ * been queued up will __vb2_perform_fileio() start to dequeue
+ * buffers. This means that initially __vb2_perform_fileio()
+ * needs to know what buffer index to use when it is queuing up
+ * the buffers for the first time. That initial index is stored
+ * in this field. Once it is equal to q->num_buffers all
+ * available buffers have been queued and __vb2_perform_fileio()
+ * should start the normal dequeue/queue cycle.
+ *
+ * vb2 provides a compatibility layer and emulator of file io (read and
+ * write) calls on top of streaming API. For proper operation it required
+ * this structure to save the driver state between each call of the read
+ * or write function.
+ */
+struct vb2_fileio_data {
+ struct v4l2_requestbuffers req;
+ struct v4l2_plane p;
+ struct v4l2_buffer b;
+ struct vb2_fileio_buf bufs[VB2_MAX_FRAME];
+ unsigned int cur_index;
+ unsigned int initial_index;
+ unsigned int q_count;
+ unsigned int dq_count;
+ unsigned read_once:1;
+ unsigned write_immediately:1;
+};
+
+/**
+ * __vb2_init_fileio() - initialize file io emulator
+ * @q: videobuf2 queue
+ * @read: mode selector (1 means read, 0 means write)
+ */
+static int __vb2_init_fileio(struct vb2_queue *q, int read)
+{
+ struct vb2_fileio_data *fileio;
+ int i, ret;
+ unsigned int count = 0;
+
+ /*
+ * Sanity check
+ */
+ if (WARN_ON((read && !(q->io_modes & VB2_READ)) ||
+ (!read && !(q->io_modes & VB2_WRITE))))
+ return -EINVAL;
+
+ /*
+ * Check if device supports mapping buffers to kernel virtual space.
+ */
+ if (!q->mem_ops->vaddr)
+ return -EBUSY;
+
+ /*
+ * Check if streaming api has not been already activated.
+ */
+ if (q->streaming || q->num_buffers > 0)
+ return -EBUSY;
+
+ /*
+ * Start with count 1, driver can increase it in queue_setup()
+ */
+ count = 1;
+
+ dprintk(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);
+
+ fileio = kzalloc(sizeof(struct vb2_fileio_data), GFP_KERNEL);
+ if (fileio == NULL)
+ return -ENOMEM;
+
+ fileio->read_once = q->fileio_read_once;
+ fileio->write_immediately = q->fileio_write_immediately;
+
+ /*
+ * Request buffers and use MMAP type to force driver
+ * to allocate buffers by itself.
+ */
+ fileio->req.count = count;
+ fileio->req.memory = VB2_MEMORY_MMAP;
+ fileio->req.type = q->type;
+ q->fileio = fileio;
+ ret = vb2_core_reqbufs(q, fileio->req.memory, &fileio->req.count);
+ if (ret)
+ goto err_kfree;
+
+ /*
+ * Check if plane_count is correct
+ * (multiplane buffers are not supported).
+ */
+ if (q->bufs[0]->num_planes != 1) {
+ ret = -EBUSY;
+ goto err_reqbufs;
+ }
+
+ /*
+ * Get kernel address of each buffer.
+ */
+ for (i = 0; i < q->num_buffers; i++) {
+ fileio->bufs[i].vaddr = vb2_plane_vaddr(q->bufs[i], 0);
+ if (fileio->bufs[i].vaddr == NULL) {
+ ret = -EINVAL;
+ goto err_reqbufs;
+ }
+ fileio->bufs[i].size = vb2_plane_size(q->bufs[i], 0);
+ }
+
+ /*
+ * Read mode requires pre queuing of all buffers.
+ */
+ if (read) {
+ bool is_multiplanar = q->is_multiplanar;
+
+ /*
+ * Queue all buffers.
+ */
+ for (i = 0; i < q->num_buffers; i++) {
+ struct v4l2_buffer *b = &fileio->b;
+
+ memset(b, 0, sizeof(*b));
+ b->type = q->type;
+ if (is_multiplanar) {
+ memset(&fileio->p, 0, sizeof(fileio->p));
+ b->m.planes = &fileio->p;
+ b->length = 1;
+ }
+ b->memory = q->memory;
+ b->index = i;
+ ret = vb2_internal_qbuf(q, b);
+ if (ret)
+ goto err_reqbufs;
+ fileio->bufs[i].queued = 1;
+ }
+ /*
+ * All buffers have been queued, so mark that by setting
+ * initial_index to q->num_buffers
+ */
+ fileio->initial_index = q->num_buffers;
+ fileio->cur_index = q->num_buffers;
+ }
+
+ /*
+ * Start streaming.
+ */
+ ret = vb2_core_streamon(q, q->type);
+ if (ret)
+ goto err_reqbufs;
+
+ return ret;
+
+err_reqbufs:
+ fileio->req.count = 0;
+ vb2_core_reqbufs(q, fileio->req.memory, &fileio->req.count);
+
+err_kfree:
+ q->fileio = NULL;
+ kfree(fileio);
+ return ret;
+}
+
+/**
+ * __vb2_cleanup_fileio() - free resourced used by file io emulator
+ * @q: videobuf2 queue
+ */
+static int __vb2_cleanup_fileio(struct vb2_queue *q)
+{
+ struct vb2_fileio_data *fileio = q->fileio;
+
+ if (fileio) {
+ 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");
+ }
+ return 0;
+}
+
+/**
+ * __vb2_perform_fileio() - perform a single file io (read or write) operation
+ * @q: videobuf2 queue
+ * @data: pointed to target userspace buffer
+ * @count: number of bytes to read or write
+ * @ppos: file handle position tracking pointer
+ * @nonblock: mode selector (1 means blocking calls, 0 means nonblocking)
+ * @read: access mode selector (1 means read, 0 means write)
+ */
+static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_t count,
+ loff_t *ppos, int nonblock, int read)
+{
+ struct vb2_fileio_data *fileio;
+ struct vb2_fileio_buf *buf;
+ bool is_multiplanar = q->is_multiplanar;
+ /*
+ * When using write() to write data to an output video node the vb2 core
+ * should set timestamps if V4L2_BUF_FLAG_TIMESTAMP_COPY is set. Nobody
+ * else is able to provide this information with the write() operation.
+ */
+ bool set_timestamp = !read &&
+ (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
+ V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ int ret, index;
+
+ dprintk(3, "mode %s, offset %ld, count %zd, %sblocking\n",
+ read ? "read" : "write", (long)*ppos, count,
+ nonblock ? "non" : "");
+
+ if (!data)
+ return -EINVAL;
+
+ /*
+ * Initialize emulator on first call.
+ */
+ if (!vb2_fileio_is_active(q)) {
+ ret = __vb2_init_fileio(q, read);
+ dprintk(3, "vb2_init_fileio result: %d\n", ret);
+ if (ret)
+ return ret;
+ }
+ fileio = q->fileio;
+
+ /*
+ * Check if we need to dequeue the buffer.
+ */
+ index = fileio->cur_index;
+ if (index >= q->num_buffers) {
+ /*
+ * Call vb2_dqbuf to get buffer back.
+ */
+ memset(&fileio->b, 0, sizeof(fileio->b));
+ fileio->b.type = q->type;
+ fileio->b.memory = q->memory;
+ if (is_multiplanar) {
+ memset(&fileio->p, 0, sizeof(fileio->p));
+ 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);
+ if (ret)
+ return ret;
+ fileio->dq_count += 1;
+
+ fileio->cur_index = index = fileio->b.index;
+ buf = &fileio->bufs[index];
+
+ /*
+ * Get number of bytes filled by the driver
+ */
+ buf->pos = 0;
+ buf->queued = 0;
+ buf->size = read ? vb2_get_plane_payload(q->bufs[index], 0)
+ : vb2_plane_size(q->bufs[index], 0);
+ /* Compensate for data_offset on read in the multiplanar case. */
+ if (is_multiplanar && read &&
+ fileio->b.m.planes[0].data_offset < buf->size) {
+ buf->pos = fileio->b.m.planes[0].data_offset;
+ buf->size -= buf->pos;
+ }
+ } else {
+ buf = &fileio->bufs[index];
+ }
+
+ /*
+ * Limit count on last few bytes of the buffer.
+ */
+ if (buf->pos + count > buf->size) {
+ count = buf->size - buf->pos;
+ dprintk(5, "reducing read count: %zd\n", count);
+ }
+
+ /*
+ * Transfer data to userspace.
+ */
+ dprintk(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");
+ return -EFAULT;
+ }
+
+ /*
+ * Update counters.
+ */
+ buf->pos += count;
+ *ppos += count;
+
+ /*
+ * Queue next buffer if required.
+ */
+ if (buf->pos == buf->size || (!read && fileio->write_immediately)) {
+ /*
+ * Check if this is the last buffer to read.
+ */
+ if (read && fileio->read_once && fileio->dq_count == 1) {
+ dprintk(3, "read limit reached\n");
+ return __vb2_cleanup_fileio(q);
+ }
+
+ /*
+ * Call vb2_qbuf and give buffer to the driver.
+ */
+ memset(&fileio->b, 0, sizeof(fileio->b));
+ fileio->b.type = q->type;
+ fileio->b.memory = q->memory;
+ fileio->b.index = index;
+ fileio->b.bytesused = buf->pos;
+ if (is_multiplanar) {
+ memset(&fileio->p, 0, sizeof(fileio->p));
+ fileio->p.bytesused = buf->pos;
+ fileio->b.m.planes = &fileio->p;
+ fileio->b.length = 1;
+ }
+ if (set_timestamp)
+ v4l2_get_timestamp(&fileio->b.timestamp);
+ ret = vb2_internal_qbuf(q, &fileio->b);
+ dprintk(5, "vb2_dbuf result: %d\n", ret);
+ if (ret)
+ return ret;
+
+ /*
+ * Buffer has been queued, update the status
+ */
+ buf->pos = 0;
+ buf->queued = 1;
+ buf->size = vb2_plane_size(q->bufs[index], 0);
+ fileio->q_count += 1;
+ /*
+ * If we are queuing up buffers for the first time, then
+ * increase initial_index by one.
+ */
+ if (fileio->initial_index < q->num_buffers)
+ fileio->initial_index++;
+ /*
+ * The next buffer to use is either a buffer that's going to be
+ * queued for the first time (initial_index < q->num_buffers)
+ * or it is equal to q->num_buffers, meaning that the next
+ * time we need to dequeue a buffer since we've now queued up
+ * all the 'first time' buffers.
+ */
+ fileio->cur_index = fileio->initial_index;
+ }
+
+ /*
+ * Return proper number of bytes processed.
+ */
+ if (ret == 0)
+ ret = count;
+ return ret;
+}
+
+size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count,
+ loff_t *ppos, int nonblocking)
+{
+ return __vb2_perform_fileio(q, data, count, ppos, nonblocking, 1);
+}
+EXPORT_SYMBOL_GPL(vb2_read);
+
+size_t vb2_write(struct vb2_queue *q, const char __user *data, size_t count,
+ loff_t *ppos, int nonblocking)
+{
+ return __vb2_perform_fileio(q, (char __user *) data, count,
+ ppos, nonblocking, 0);
+}
+EXPORT_SYMBOL_GPL(vb2_write);
+
+struct vb2_threadio_data {
+ struct task_struct *thread;
+ vb2_thread_fnc fnc;
+ void *priv;
+ bool stop;
+};
+
+static int vb2_thread(void *data)
+{
+ struct vb2_queue *q = data;
+ struct vb2_threadio_data *threadio = q->threadio;
+ struct vb2_fileio_data *fileio = q->fileio;
+ bool set_timestamp = false;
+ int prequeue = 0;
+ int index = 0;
+ int ret = 0;
+
+ if (q->is_output) {
+ prequeue = q->num_buffers;
+ set_timestamp =
+ (q->timestamp_flags & V4L2_BUF_FLAG_TIMESTAMP_MASK) ==
+ V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ }
+
+ set_freezable();
+
+ for (;;) {
+ struct vb2_buffer *vb;
+
+ /*
+ * Call vb2_dqbuf to get buffer back.
+ */
+ memset(&fileio->b, 0, sizeof(fileio->b));
+ fileio->b.type = q->type;
+ fileio->b.memory = q->memory;
+ if (prequeue) {
+ fileio->b.index = index++;
+ prequeue--;
+ } else {
+ call_void_qop(q, wait_finish, q);
+ if (!threadio->stop)
+ ret = vb2_internal_dqbuf(q, &fileio->b, 0);
+ call_void_qop(q, wait_prepare, q);
+ dprintk(5, "file io: vb2_dqbuf result: %d\n", ret);
+ }
+ if (ret || threadio->stop)
+ break;
+ try_to_freeze();
+
+ vb = q->bufs[fileio->b.index];
+ if (!(fileio->b.flags & V4L2_BUF_FLAG_ERROR))
+ if (threadio->fnc(vb, threadio->priv))
+ break;
+ call_void_qop(q, wait_finish, q);
+ if (set_timestamp)
+ v4l2_get_timestamp(&fileio->b.timestamp);
+ if (!threadio->stop)
+ ret = vb2_internal_qbuf(q, &fileio->b);
+ call_void_qop(q, wait_prepare, q);
+ if (ret || threadio->stop)
+ break;
+ }
+
+ /* Hmm, linux becomes *very* unhappy without this ... */
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ return 0;
+}
+
+/*
+ * This function should not be used for anything else but the videobuf2-dvb
+ * support. If you think you have another good use-case for this, then please
+ * contact the linux-media mailinglist first.
+ */
+int vb2_thread_start(struct vb2_queue *q, vb2_thread_fnc fnc, void *priv,
+ const char *thread_name)
+{
+ struct vb2_threadio_data *threadio;
+ int ret = 0;
+
+ if (q->threadio)
+ return -EBUSY;
+ if (vb2_is_busy(q))
+ return -EBUSY;
+ if (WARN_ON(q->fileio))
+ return -EBUSY;
+
+ threadio = kzalloc(sizeof(*threadio), GFP_KERNEL);
+ if (threadio == NULL)
+ return -ENOMEM;
+ threadio->fnc = fnc;
+ threadio->priv = priv;
+
+ ret = __vb2_init_fileio(q, !q->is_output);
+ dprintk(3, "file io: vb2_init_fileio result: %d\n", ret);
+ if (ret)
+ goto nomem;
+ q->threadio = threadio;
+ threadio->thread = kthread_run(vb2_thread, q, "vb2-%s", thread_name);
+ if (IS_ERR(threadio->thread)) {
+ ret = PTR_ERR(threadio->thread);
+ threadio->thread = NULL;
+ goto nothread;
+ }
+ return 0;
+
+nothread:
+ __vb2_cleanup_fileio(q);
+nomem:
+ kfree(threadio);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(vb2_thread_start);
+
+int vb2_thread_stop(struct vb2_queue *q)
+{
+ struct vb2_threadio_data *threadio = q->threadio;
+ int err;
+
+ if (threadio == NULL)
+ return 0;
+ threadio->stop = true;
+ /* Wake up all pending sleeps in the thread */
+ vb2_queue_error(q);
+ err = kthread_stop(threadio->thread);
+ __vb2_cleanup_fileio(q);
+ threadio->thread = NULL;
+ kfree(threadio);
+ q->threadio = NULL;
+ return err;
+}
+EXPORT_SYMBOL_GPL(vb2_thread_stop);
+
+/*
+ * The following functions are not part of the vb2 core API, but are helper
+ * functions that plug into struct v4l2_ioctl_ops, struct v4l2_file_operations
+ * and struct vb2_ops.
+ * They contain boilerplate code that most if not all drivers have to do
+ * and so they simplify the driver code.
+ */
+
+/* The queue is busy if there is a owner and you are not that owner. */
+static inline bool vb2_queue_is_busy(struct video_device *vdev, struct file *file)
+{
+ return vdev->queue->owner && vdev->queue->owner != file->private_data;
+}
+
+/* vb2 ioctl helpers */
+
+int vb2_ioctl_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *p)
+{
+ struct video_device *vdev = video_devdata(file);
+ int res = vb2_verify_memory_type(vdev->queue, p->memory, p->type);
+
+ if (res)
+ return res;
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ 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)
+ vdev->queue->owner = p->count ? file->private_data : NULL;
+ return res;
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_reqbufs);
+
+int vb2_ioctl_create_bufs(struct file *file, void *priv,
+ struct v4l2_create_buffers *p)
+{
+ struct video_device *vdev = video_devdata(file);
+ int res = vb2_verify_memory_type(vdev->queue, p->memory,
+ p->format.type);
+
+ p->index = vdev->queue->num_buffers;
+ /*
+ * If count == 0, then just check if memory and type are valid.
+ * Any -EBUSY result from vb2_verify_memory_type can be mapped to 0.
+ */
+ if (p->count == 0)
+ return res != -EBUSY ? res : 0;
+ if (res)
+ return res;
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ res = vb2_core_create_bufs(vdev->queue, p->memory, &p->count,
+ &p->format);
+ if (res == 0)
+ vdev->queue->owner = file->private_data;
+ return res;
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_create_bufs);
+
+int vb2_ioctl_prepare_buf(struct file *file, void *priv,
+ struct v4l2_buffer *p)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ return vb2_prepare_buf(vdev->queue, p);
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_prepare_buf);
+
+int vb2_ioctl_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ /* No need to call vb2_queue_is_busy(), anyone can query buffers. */
+ return vb2_querybuf(vdev->queue, p);
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_querybuf);
+
+int vb2_ioctl_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ return vb2_qbuf(vdev->queue, p);
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_qbuf);
+
+int vb2_ioctl_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ return vb2_dqbuf(vdev->queue, p, file->f_flags & O_NONBLOCK);
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_dqbuf);
+
+int vb2_ioctl_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ return vb2_streamon(vdev->queue, i);
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_streamon);
+
+int vb2_ioctl_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ return vb2_streamoff(vdev->queue, i);
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_streamoff);
+
+int vb2_ioctl_expbuf(struct file *file, void *priv, struct v4l2_exportbuffer *p)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ if (vb2_queue_is_busy(vdev, file))
+ return -EBUSY;
+ return vb2_expbuf(vdev->queue, p);
+}
+EXPORT_SYMBOL_GPL(vb2_ioctl_expbuf);
+
+/* v4l2_file_operations helpers */
+
+int vb2_fop_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ return vb2_mmap(vdev->queue, vma);
+}
+EXPORT_SYMBOL_GPL(vb2_fop_mmap);
+
+int _vb2_fop_release(struct file *file, struct mutex *lock)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ if (lock)
+ mutex_lock(lock);
+ if (file->private_data == vdev->queue->owner) {
+ vb2_queue_release(vdev->queue);
+ vdev->queue->owner = NULL;
+ }
+ if (lock)
+ mutex_unlock(lock);
+ return v4l2_fh_release(file);
+}
+EXPORT_SYMBOL_GPL(_vb2_fop_release);
+
+int vb2_fop_release(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
+
+ return _vb2_fop_release(file, lock);
+}
+EXPORT_SYMBOL_GPL(vb2_fop_release);
+
+ssize_t vb2_fop_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
+ int err = -EBUSY;
+
+ if (!(vdev->queue->io_modes & VB2_WRITE))
+ return -EINVAL;
+ if (lock && mutex_lock_interruptible(lock))
+ return -ERESTARTSYS;
+ if (vb2_queue_is_busy(vdev, file))
+ goto exit;
+ err = vb2_write(vdev->queue, buf, count, ppos,
+ file->f_flags & O_NONBLOCK);
+ if (vdev->queue->fileio)
+ vdev->queue->owner = file->private_data;
+exit:
+ if (lock)
+ mutex_unlock(lock);
+ return err;
+}
+EXPORT_SYMBOL_GPL(vb2_fop_write);
+
+ssize_t vb2_fop_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
+ int err = -EBUSY;
+
+ if (!(vdev->queue->io_modes & VB2_READ))
+ return -EINVAL;
+ if (lock && mutex_lock_interruptible(lock))
+ return -ERESTARTSYS;
+ if (vb2_queue_is_busy(vdev, file))
+ goto exit;
+ err = vb2_read(vdev->queue, buf, count, ppos,
+ file->f_flags & O_NONBLOCK);
+ if (vdev->queue->fileio)
+ vdev->queue->owner = file->private_data;
+exit:
+ if (lock)
+ mutex_unlock(lock);
+ return err;
+}
+EXPORT_SYMBOL_GPL(vb2_fop_read);
+
+unsigned int vb2_fop_poll(struct file *file, poll_table *wait)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct vb2_queue *q = vdev->queue;
+ struct mutex *lock = q->lock ? q->lock : vdev->lock;
+ unsigned res;
+ void *fileio;
+
+ /*
+ * If this helper doesn't know how to lock, then you shouldn't be using
+ * it but you should write your own.
+ */
+ WARN_ON(!lock);
+
+ if (lock && mutex_lock_interruptible(lock))
+ return POLLERR;
+
+ fileio = q->fileio;
+
+ res = vb2_poll(vdev->queue, file, wait);
+
+ /* If fileio was started, then we have a new queue owner. */
+ if (!fileio && q->fileio)
+ q->owner = file->private_data;
+ if (lock)
+ mutex_unlock(lock);
+ return res;
+}
+EXPORT_SYMBOL_GPL(vb2_fop_poll);
+
+#ifndef CONFIG_MMU
+unsigned long vb2_fop_get_unmapped_area(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ return vb2_get_unmapped_area(vdev->queue, addr, len, pgoff, flags);
+}
+EXPORT_SYMBOL_GPL(vb2_fop_get_unmapped_area);
+#endif
+
+/* vb2_ops helpers. Only use if vq->lock is non-NULL. */
+
+void vb2_ops_wait_prepare(struct vb2_queue *vq)
+{
+ mutex_unlock(vq->lock);
+}
+EXPORT_SYMBOL_GPL(vb2_ops_wait_prepare);
+
+void vb2_ops_wait_finish(struct vb2_queue *vq)
+{
+ mutex_lock(vq->lock);
+}
+EXPORT_SYMBOL_GPL(vb2_ops_wait_finish);
+
+MODULE_DESCRIPTION("Driver helper framework for Video for Linux 2");
+MODULE_AUTHOR("Pawel Osciak <pawel@osciak.com>, Marek Szyprowski");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/v4l2-core/videobuf2-vmalloc.c b/drivers/media/v4l2-core/videobuf2-vmalloc.c
index ecb8f0c7f025..1c302743a1fd 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-core.h>
+#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#include <media/videobuf2-memops.h>

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