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-rw-r--r--drivers/media/video/ivtv/ivtv-fileops.c4
-rw-r--r--drivers/media/video/ivtv/ivtv-ioctl.c4
-rw-r--r--drivers/media/video/omap3isp/ispccdc.c3
-rw-r--r--drivers/media/video/omap3isp/ispstat.c3
-rw-r--r--drivers/media/video/v4l2-ctrls.c18
-rw-r--r--drivers/media/video/v4l2-event.c88
-rw-r--r--drivers/media/video/v4l2-fh.c4
-rw-r--r--drivers/media/video/v4l2-subdev.c7
-rw-r--r--drivers/media/video/vivi.c2
-rw-r--r--drivers/usb/gadget/uvc_v4l2.c12
-rw-r--r--include/media/v4l2-ctrls.h19
-rw-r--r--include/media/v4l2-event.h18
-rw-r--r--include/media/v4l2-fh.h2
-rw-r--r--include/media/v4l2-subdev.h2
14 files changed, 54 insertions, 132 deletions
diff --git a/drivers/media/video/ivtv/ivtv-fileops.c b/drivers/media/video/ivtv/ivtv-fileops.c
index d4275d2460cb..38f052257f46 100644
--- a/drivers/media/video/ivtv/ivtv-fileops.c
+++ b/drivers/media/video/ivtv/ivtv-fileops.c
@@ -966,10 +966,6 @@ static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
return -ENOMEM;
}
v4l2_fh_init(&item->fh, s->vdev);
- if (s->type == IVTV_DEC_STREAM_TYPE_YUV ||
- s->type == IVTV_DEC_STREAM_TYPE_MPG) {
- res = v4l2_event_alloc(&item->fh, 60);
- }
if (res < 0) {
v4l2_fh_exit(&item->fh);
kfree(item);
diff --git a/drivers/media/video/ivtv/ivtv-ioctl.c b/drivers/media/video/ivtv/ivtv-ioctl.c
index ff75d07097b2..3e5c090af112 100644
--- a/drivers/media/video/ivtv/ivtv-ioctl.c
+++ b/drivers/media/video/ivtv/ivtv-ioctl.c
@@ -1450,13 +1450,11 @@ static int ivtv_subscribe_event(struct v4l2_fh *fh, struct v4l2_event_subscripti
switch (sub->type) {
case V4L2_EVENT_VSYNC:
case V4L2_EVENT_EOS:
- break;
case V4L2_EVENT_CTRL:
- return v4l2_ctrl_subscribe_fh(fh, sub, 0);
+ return v4l2_event_subscribe(fh, sub, 0);
default:
return -EINVAL;
}
- return v4l2_event_subscribe(fh, sub);
}
static int ivtv_log_status(struct file *file, void *fh)
diff --git a/drivers/media/video/omap3isp/ispccdc.c b/drivers/media/video/omap3isp/ispccdc.c
index 39d501bda636..67662470661d 100644
--- a/drivers/media/video/omap3isp/ispccdc.c
+++ b/drivers/media/video/omap3isp/ispccdc.c
@@ -1691,7 +1691,7 @@ static int ccdc_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
if (sub->type != V4L2_EVENT_OMAP3ISP_HS_VS)
return -EINVAL;
- return v4l2_event_subscribe(fh, sub);
+ return v4l2_event_subscribe(fh, sub, OMAP3ISP_CCDC_NEVENTS);
}
static int ccdc_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
@@ -2162,7 +2162,6 @@ static int ccdc_init_entities(struct isp_ccdc_device *ccdc)
sd->grp_id = 1 << 16; /* group ID for isp subdevs */
v4l2_set_subdevdata(sd, ccdc);
sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;
- sd->nevents = OMAP3ISP_CCDC_NEVENTS;
pads[CCDC_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
pads[CCDC_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;
diff --git a/drivers/media/video/omap3isp/ispstat.c b/drivers/media/video/omap3isp/ispstat.c
index b44cb685236a..808065948ac1 100644
--- a/drivers/media/video/omap3isp/ispstat.c
+++ b/drivers/media/video/omap3isp/ispstat.c
@@ -1032,7 +1032,6 @@ static int isp_stat_init_entities(struct ispstat *stat, const char *name,
snprintf(subdev->name, V4L2_SUBDEV_NAME_SIZE, "OMAP3 ISP %s", name);
subdev->grp_id = 1 << 16; /* group ID for isp subdevs */
subdev->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;
- subdev->nevents = STAT_NEVENTS;
v4l2_set_subdevdata(subdev, stat);
stat->pad.flags = MEDIA_PAD_FL_SINK;
@@ -1050,7 +1049,7 @@ int omap3isp_stat_subscribe_event(struct v4l2_subdev *subdev,
if (sub->type != stat->event_type)
return -EINVAL;
- return v4l2_event_subscribe(fh, sub);
+ return v4l2_event_subscribe(fh, sub, STAT_NEVENTS);
}
int omap3isp_stat_unsubscribe_event(struct v4l2_subdev *subdev,
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index b63fe2a17fce..a37e5bff4342 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -1011,7 +1011,6 @@ static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
insertion is an O(1) operation. */
if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
list_add_tail(&new_ref->node, &hdl->ctrl_refs);
- hdl->nr_of_refs++;
goto insert_in_hash;
}
@@ -2051,20 +2050,3 @@ void v4l2_ctrl_del_event(struct v4l2_ctrl *ctrl,
v4l2_ctrl_unlock(ctrl);
}
EXPORT_SYMBOL(v4l2_ctrl_del_event);
-
-int v4l2_ctrl_subscribe_fh(struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub, unsigned n)
-{
- struct v4l2_ctrl_handler *hdl = fh->ctrl_handler;
- int ret = 0;
-
- if (!ret) {
- if (hdl->nr_of_refs * 2 > n)
- n = hdl->nr_of_refs * 2;
- ret = v4l2_event_alloc(fh, n);
- }
- if (!ret)
- ret = v4l2_event_subscribe(fh, sub);
- return ret;
-}
-EXPORT_SYMBOL(v4l2_ctrl_subscribe_fh);
diff --git a/drivers/media/video/v4l2-event.c b/drivers/media/video/v4l2-event.c
index dc68f6085697..9e325dd3ce27 100644
--- a/drivers/media/video/v4l2-event.c
+++ b/drivers/media/video/v4l2-event.c
@@ -30,44 +30,11 @@
#include <linux/sched.h>
#include <linux/slab.h>
-static void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);
-
-int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n)
-{
- unsigned long flags;
-
- while (fh->nallocated < n) {
- struct v4l2_kevent *kev;
-
- kev = kzalloc(sizeof(*kev), GFP_KERNEL);
- if (kev == NULL)
- return -ENOMEM;
-
- spin_lock_irqsave(&fh->vdev->fh_lock, flags);
- list_add_tail(&kev->list, &fh->free);
- fh->nallocated++;
- spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(v4l2_event_alloc);
-
-#define list_kfree(list, type, member) \
- while (!list_empty(list)) { \
- type *hi; \
- hi = list_first_entry(list, type, member); \
- list_del(&hi->member); \
- kfree(hi); \
- }
-
-void v4l2_event_free(struct v4l2_fh *fh)
+static unsigned sev_pos(const struct v4l2_subscribed_event *sev, unsigned idx)
{
- list_kfree(&fh->free, struct v4l2_kevent, list);
- list_kfree(&fh->available, struct v4l2_kevent, list);
- v4l2_event_unsubscribe_all(fh);
+ idx += sev->first;
+ return idx >= sev->elems ? idx - sev->elems : idx;
}
-EXPORT_SYMBOL_GPL(v4l2_event_free);
static int __v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event)
{
@@ -84,11 +51,13 @@ static int __v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event)
WARN_ON(fh->navailable == 0);
kev = list_first_entry(&fh->available, struct v4l2_kevent, list);
- list_move(&kev->list, &fh->free);
+ list_del(&kev->list);
fh->navailable--;
kev->event.pending = fh->navailable;
*event = kev->event;
+ kev->sev->first = sev_pos(kev->sev, 1);
+ kev->sev->in_use--;
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
@@ -154,17 +123,24 @@ static void __v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *e
fh->sequence++;
/* Do we have any free events? */
- if (list_empty(&fh->free))
- return;
+ if (sev->in_use == sev->elems) {
+ /* no, remove the oldest one */
+ kev = sev->events + sev_pos(sev, 0);
+ list_del(&kev->list);
+ sev->in_use--;
+ sev->first = sev_pos(sev, 1);
+ fh->navailable--;
+ }
/* Take one and fill it. */
- kev = list_first_entry(&fh->free, struct v4l2_kevent, list);
+ kev = sev->events + sev_pos(sev, sev->in_use);
kev->event.type = ev->type;
kev->event.u = ev->u;
kev->event.id = ev->id;
kev->event.timestamp = *ts;
kev->event.sequence = fh->sequence;
- list_move_tail(&kev->list, &fh->available);
+ sev->in_use++;
+ list_add_tail(&kev->list, &fh->available);
fh->navailable++;
@@ -209,38 +185,39 @@ int v4l2_event_pending(struct v4l2_fh *fh)
EXPORT_SYMBOL_GPL(v4l2_event_pending);
int v4l2_event_subscribe(struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub)
+ struct v4l2_event_subscription *sub, unsigned elems)
{
struct v4l2_subscribed_event *sev, *found_ev;
struct v4l2_ctrl *ctrl = NULL;
unsigned long flags;
+ unsigned i;
+ if (elems < 1)
+ elems = 1;
if (sub->type == V4L2_EVENT_CTRL) {
ctrl = v4l2_ctrl_find(fh->ctrl_handler, sub->id);
if (ctrl == NULL)
return -EINVAL;
}
- sev = kzalloc(sizeof(*sev), GFP_KERNEL);
+ sev = kzalloc(sizeof(*sev) + sizeof(struct v4l2_kevent) * elems, GFP_KERNEL);
if (!sev)
return -ENOMEM;
+ for (i = 0; i < elems; i++)
+ sev->events[i].sev = sev;
+ sev->type = sub->type;
+ sev->id = sub->id;
+ sev->flags = sub->flags;
+ sev->fh = fh;
+ sev->elems = elems;
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
-
found_ev = v4l2_event_subscribed(fh, sub->type, sub->id);
- if (!found_ev) {
- INIT_LIST_HEAD(&sev->list);
- sev->type = sub->type;
- sev->id = sub->id;
- sev->fh = fh;
- sev->flags = sub->flags;
-
+ if (!found_ev)
list_add(&sev->list, &fh->subscribed);
- }
-
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
- /* v4l2_ctrl_add_fh uses a mutex, so do this outside the spin lock */
+ /* v4l2_ctrl_add_event uses a mutex, so do this outside the spin lock */
if (found_ev)
kfree(sev);
else if (ctrl)
@@ -250,7 +227,7 @@ int v4l2_event_subscribe(struct v4l2_fh *fh,
}
EXPORT_SYMBOL_GPL(v4l2_event_subscribe);
-static void v4l2_event_unsubscribe_all(struct v4l2_fh *fh)
+void v4l2_event_unsubscribe_all(struct v4l2_fh *fh)
{
struct v4l2_event_subscription sub;
struct v4l2_subscribed_event *sev;
@@ -271,6 +248,7 @@ static void v4l2_event_unsubscribe_all(struct v4l2_fh *fh)
v4l2_event_unsubscribe(fh, &sub);
} while (sev);
}
+EXPORT_SYMBOL_GPL(v4l2_event_unsubscribe_all);
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
diff --git a/drivers/media/video/v4l2-fh.c b/drivers/media/video/v4l2-fh.c
index 333b8c8f40d6..122822d2b8b2 100644
--- a/drivers/media/video/v4l2-fh.c
+++ b/drivers/media/video/v4l2-fh.c
@@ -37,9 +37,7 @@ void v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
INIT_LIST_HEAD(&fh->list);
set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);
fh->prio = V4L2_PRIORITY_UNSET;
-
init_waitqueue_head(&fh->wait);
- INIT_LIST_HEAD(&fh->free);
INIT_LIST_HEAD(&fh->available);
INIT_LIST_HEAD(&fh->subscribed);
fh->sequence = -1;
@@ -88,7 +86,7 @@ void v4l2_fh_exit(struct v4l2_fh *fh)
{
if (fh->vdev == NULL)
return;
- v4l2_event_free(fh);
+ v4l2_event_unsubscribe_all(fh);
fh->vdev = NULL;
}
EXPORT_SYMBOL_GPL(v4l2_fh_exit);
diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c
index 3b67a8584916..b7967c9dc4ae 100644
--- a/drivers/media/video/v4l2-subdev.c
+++ b/drivers/media/video/v4l2-subdev.c
@@ -76,13 +76,6 @@ static int subdev_open(struct file *file)
}
v4l2_fh_init(&subdev_fh->vfh, vdev);
-
- if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) {
- ret = v4l2_event_alloc(&subdev_fh->vfh, sd->nevents);
- if (ret)
- goto err;
- }
-
v4l2_fh_add(&subdev_fh->vfh);
file->private_data = &subdev_fh->vfh;
#if defined(CONFIG_MEDIA_CONTROLLER)
diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
index 1b90713b44c5..cc1cf6b17183 100644
--- a/drivers/media/video/vivi.c
+++ b/drivers/media/video/vivi.c
@@ -993,7 +993,7 @@ static int vidioc_subscribe_event(struct v4l2_fh *fh,
{
switch (sub->type) {
case V4L2_EVENT_CTRL:
- return v4l2_ctrl_subscribe_fh(fh, sub, 0);
+ return v4l2_event_subscribe(fh, sub, 0);
default:
return -EINVAL;
}
diff --git a/drivers/usb/gadget/uvc_v4l2.c b/drivers/usb/gadget/uvc_v4l2.c
index 55828705d859..52f8f9e513af 100644
--- a/drivers/usb/gadget/uvc_v4l2.c
+++ b/drivers/usb/gadget/uvc_v4l2.c
@@ -124,18 +124,12 @@ uvc_v4l2_open(struct file *file)
struct video_device *vdev = video_devdata(file);
struct uvc_device *uvc = video_get_drvdata(vdev);
struct uvc_file_handle *handle;
- int ret;
handle = kzalloc(sizeof(*handle), GFP_KERNEL);
if (handle == NULL)
return -ENOMEM;
v4l2_fh_init(&handle->vfh, vdev);
-
- ret = v4l2_event_alloc(&handle->vfh, 8);
- if (ret < 0)
- goto error;
-
v4l2_fh_add(&handle->vfh);
handle->device = &uvc->video;
@@ -143,10 +137,6 @@ uvc_v4l2_open(struct file *file)
uvc_function_connect(uvc);
return 0;
-
-error:
- v4l2_fh_exit(&handle->vfh);
- return ret;
}
static int
@@ -308,7 +298,7 @@ uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
if (sub->type < UVC_EVENT_FIRST || sub->type > UVC_EVENT_LAST)
return -EINVAL;
- return v4l2_event_subscribe(&handle->vfh, arg);
+ return v4l2_event_subscribe(&handle->vfh, arg, 2);
}
case VIDIOC_UNSUBSCRIBE_EVENT:
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index a15e9098f98b..69662912e50c 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -171,7 +171,6 @@ struct v4l2_ctrl_ref {
* control is needed multiple times, so this is a simple
* optimization.
* @buckets: Buckets for the hashing. Allows for quick control lookup.
- * @nr_of_refs: Total number of control references in the list.
* @nr_of_buckets: Total number of buckets in the array.
* @error: The error code of the first failed control addition.
*/
@@ -181,7 +180,6 @@ struct v4l2_ctrl_handler {
struct list_head ctrl_refs;
struct v4l2_ctrl_ref *cached;
struct v4l2_ctrl_ref **buckets;
- u16 nr_of_refs;
u16 nr_of_buckets;
int error;
};
@@ -499,23 +497,6 @@ void v4l2_ctrl_add_event(struct v4l2_ctrl *ctrl,
void v4l2_ctrl_del_event(struct v4l2_ctrl *ctrl,
struct v4l2_subscribed_event *sev);
-/** v4l2_ctrl_subscribe_fh() - Helper function that subscribes a control event.
- * @fh: The file handler that subscribed the control event.
- * @sub: The event to subscribe (type must be V4L2_EVENT_CTRL).
- * @n: How many events should be allocated? (Passed to v4l2_event_alloc).
- * Recommended to set to twice the number of controls plus whatever
- * is needed for other events. This function will set n to
- * max(n, 2 * fh->ctrl_handler->nr_of_refs).
- *
- * A helper function that initializes the fh for events, allocates the
- * list of events and subscribes the control event.
- *
- * Typically called in the handler of VIDIOC_SUBSCRIBE_EVENT in the
- * V4L2_EVENT_CTRL case.
- */
-int v4l2_ctrl_subscribe_fh(struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub, unsigned n);
-
/* Helpers for ioctl_ops. If hdl == NULL then they will all return -EINVAL. */
int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc);
int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm);
diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h
index eda17f8d78bc..8d681e5ca552 100644
--- a/include/media/v4l2-event.h
+++ b/include/media/v4l2-event.h
@@ -30,10 +30,15 @@
#include <linux/wait.h>
struct v4l2_fh;
+struct v4l2_subscribed_event;
struct video_device;
struct v4l2_kevent {
+ /* list node for the v4l2_fh->available list */
struct list_head list;
+ /* pointer to parent v4l2_subscribed_event */
+ struct v4l2_subscribed_event *sev;
+ /* event itself */
struct v4l2_event event;
};
@@ -50,18 +55,25 @@ struct v4l2_subscribed_event {
struct v4l2_fh *fh;
/* list node that hooks into the object's event list (if there is one) */
struct list_head node;
+ /* the number of elements in the events array */
+ unsigned elems;
+ /* the index of the events containing the oldest available event */
+ unsigned first;
+ /* the number of queued events */
+ unsigned in_use;
+ /* an array of elems events */
+ struct v4l2_kevent events[];
};
-int v4l2_event_alloc(struct v4l2_fh *fh, unsigned int n);
-void v4l2_event_free(struct v4l2_fh *fh);
int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event,
int nonblocking);
void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev);
void v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *ev);
int v4l2_event_pending(struct v4l2_fh *fh);
int v4l2_event_subscribe(struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub);
+ struct v4l2_event_subscription *sub, unsigned elems);
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
+void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);
#endif /* V4L2_EVENT_H */
diff --git a/include/media/v4l2-fh.h b/include/media/v4l2-fh.h
index bfc0457ca6ef..52513c225c18 100644
--- a/include/media/v4l2-fh.h
+++ b/include/media/v4l2-fh.h
@@ -40,10 +40,8 @@ struct v4l2_fh {
/* Events */
wait_queue_head_t wait;
struct list_head subscribed; /* Subscribed events */
- struct list_head free; /* Events ready for use */
struct list_head available; /* Dequeueable event */
unsigned int navailable;
- unsigned int nallocated; /* Number of allocated events */
u32 sequence;
};
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 2884e3e69cb1..b05579b4adb7 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -513,8 +513,6 @@ struct v4l2_subdev {
void *host_priv;
/* subdev device node */
struct video_device devnode;
- /* number of events to be allocated on open */
- unsigned int nevents;
};
#define media_entity_to_v4l2_subdev(ent) \
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 09:00:23 +0100