diff options
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-fileops.c | 4 | ||||
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-ioctl.c | 4 | ||||
| -rw-r--r-- | drivers/media/video/omap3isp/ispccdc.c | 3 | ||||
| -rw-r--r-- | drivers/media/video/omap3isp/ispstat.c | 3 | ||||
| -rw-r--r-- | drivers/media/video/v4l2-ctrls.c | 18 | ||||
| -rw-r--r-- | drivers/media/video/v4l2-event.c | 88 | ||||
| -rw-r--r-- | drivers/media/video/v4l2-fh.c | 4 | ||||
| -rw-r--r-- | drivers/media/video/v4l2-subdev.c | 7 | ||||
| -rw-r--r-- | drivers/media/video/vivi.c | 2 | ||||
| -rw-r--r-- | drivers/usb/gadget/uvc_v4l2.c | 12 | ||||
| -rw-r--r-- | include/media/v4l2-ctrls.h | 19 | ||||
| -rw-r--r-- | include/media/v4l2-event.h | 18 | ||||
| -rw-r--r-- | include/media/v4l2-fh.h | 2 | ||||
| -rw-r--r-- | include/media/v4l2-subdev.h | 2 |
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) \ |