INIT_LIST_HEAD(&priv->lhead);
INIT_LIST_HEAD(&priv->fbs);
+ INIT_LIST_HEAD(&priv->event_list);
+ init_waitqueue_head(&priv->event_wait);
+ priv->event_space = 4096; /* set aside 4k for event buffer */
if (dev->driver->driver_features & DRIVER_GEM)
drm_gem_open(dev, priv);
}
}
+static void drm_events_release(struct drm_file *file_priv)
+{
+ struct drm_device *dev = file_priv->minor->dev;
+ struct drm_pending_event *e, *et;
+ struct drm_pending_vblank_event *v, *vt;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+
+ /* Remove pending flips */
+ list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link)
+ if (v->base.file_priv == file_priv) {
+ list_del(&v->base.link);
+ drm_vblank_put(dev, v->pipe);
+ v->base.destroy(&v->base);
+ }
+
+ /* Remove unconsumed events */
+ list_for_each_entry_safe(e, et, &file_priv->event_list, link)
+ e->destroy(e);
+
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
/**
* Release file.
*
if (file_priv->minor->master)
drm_master_release(dev, filp);
+ drm_events_release(file_priv);
+
if (dev->driver->driver_features & DRIVER_GEM)
drm_gem_release(dev, file_priv);
}
EXPORT_SYMBOL(drm_release);
-/** No-op. */
+static bool
+drm_dequeue_event(struct drm_file *file_priv,
+ size_t total, size_t max, struct drm_pending_event **out)
+{
+ struct drm_device *dev = file_priv->minor->dev;
+ struct drm_pending_event *e;
+ unsigned long flags;
+ bool ret = false;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+
+ *out = NULL;
+ if (list_empty(&file_priv->event_list))
+ goto out;
+ e = list_first_entry(&file_priv->event_list,
+ struct drm_pending_event, link);
+ if (e->event->length + total > max)
+ goto out;
+
+ file_priv->event_space += e->event->length;
+ list_del(&e->link);
+ *out = e;
+ ret = true;
+
+out:
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ return ret;
+}
+
+ssize_t drm_read(struct file *filp, char __user *buffer,
+ size_t count, loff_t *offset)
+{
+ struct drm_file *file_priv = filp->private_data;
+ struct drm_pending_event *e;
+ size_t total;
+ ssize_t ret;
+
+ ret = wait_event_interruptible(file_priv->event_wait,
+ !list_empty(&file_priv->event_list));
+ if (ret < 0)
+ return ret;
+
+ total = 0;
+ while (drm_dequeue_event(file_priv, total, count, &e)) {
+ if (copy_to_user(buffer + total,
+ e->event, e->event->length)) {
+ total = -EFAULT;
+ break;
+ }
+
+ total += e->event->length;
+ e->destroy(e);
+ }
+
+ return total;
+}
+EXPORT_SYMBOL(drm_read);
+
unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
{
- return 0;
+ struct drm_file *file_priv = filp->private_data;
+ unsigned int mask = 0;
+
+ poll_wait(filp, &file_priv->event_wait, wait);
+
+ if (!list_empty(&file_priv->event_list))
+ mask |= POLLIN | POLLRDNORM;
+
+ return mask;
}
EXPORT_SYMBOL(drm_poll);
return ret;
}
+static int drm_queue_vblank_event(struct drm_device *dev, int pipe,
+ union drm_wait_vblank *vblwait,
+ struct drm_file *file_priv)
+{
+ struct drm_pending_vblank_event *e;
+ struct timeval now;
+ unsigned long flags;
+ unsigned int seq;
+
+ e = kzalloc(sizeof *e, GFP_KERNEL);
+ if (e == NULL)
+ return -ENOMEM;
+
+ e->pipe = pipe;
+ e->event.base.type = DRM_EVENT_VBLANK;
+ e->event.base.length = sizeof e->event;
+ e->event.user_data = vblwait->request.signal;
+ e->base.event = &e->event.base;
+ e->base.file_priv = file_priv;
+ e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
+
+ do_gettimeofday(&now);
+ spin_lock_irqsave(&dev->event_lock, flags);
+
+ if (file_priv->event_space < sizeof e->event) {
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ kfree(e);
+ return -ENOMEM;
+ }
+
+ file_priv->event_space -= sizeof e->event;
+ seq = drm_vblank_count(dev, pipe);
+ if ((vblwait->request.type & _DRM_VBLANK_NEXTONMISS) &&
+ (seq - vblwait->request.sequence) <= (1 << 23)) {
+ vblwait->request.sequence = seq + 1;
+ }
+
+ DRM_DEBUG("event on vblank count %d, current %d, crtc %d\n",
+ vblwait->request.sequence, seq, pipe);
+
+ e->event.sequence = vblwait->request.sequence;
+ if ((seq - vblwait->request.sequence) <= (1 << 23)) {
+ e->event.tv_sec = now.tv_sec;
+ e->event.tv_usec = now.tv_usec;
+ drm_vblank_put(dev, e->pipe);
+ list_add_tail(&e->base.link, &e->base.file_priv->event_list);
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+ } else {
+ list_add_tail(&e->base.link, &dev->vblank_event_list);
+ }
+
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+
+ return 0;
+}
+
/**
* Wait for VBLANK.
*
goto done;
}
+ if (flags & _DRM_VBLANK_EVENT)
+ return drm_queue_vblank_event(dev, crtc, vblwait, file_priv);
+
if ((flags & _DRM_VBLANK_NEXTONMISS) &&
(seq - vblwait->request.sequence) <= (1<<23)) {
vblwait->request.sequence = seq + 1;
return ret;
}
+void drm_handle_vblank_events(struct drm_device *dev, int crtc)
+{
+ struct drm_pending_vblank_event *e, *t;
+ struct timeval now;
+ unsigned long flags;
+ unsigned int seq;
+
+ do_gettimeofday(&now);
+ seq = drm_vblank_count(dev, crtc);
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+
+ list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) {
+ if (e->pipe != crtc)
+ continue;
+ if ((seq - e->event.sequence) > (1<<23))
+ continue;
+
+ DRM_DEBUG("vblank event on %d, current %d\n",
+ e->event.sequence, seq);
+
+ e->event.sequence = seq;
+ e->event.tv_sec = now.tv_sec;
+ e->event.tv_usec = now.tv_usec;
+ drm_vblank_put(dev, e->pipe);
+ list_move_tail(&e->base.link, &e->base.file_priv->event_list);
+ wake_up_interruptible(&e->base.file_priv->event_wait);
+ }
+
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
/**
* drm_handle_vblank - handle a vblank event
* @dev: DRM device
*/
void drm_handle_vblank(struct drm_device *dev, int crtc)
{
+ if (!dev->num_crtcs)
+ return;
+
atomic_inc(&dev->_vblank_count[crtc]);
DRM_WAKEUP(&dev->vbl_queue[crtc]);
+ drm_handle_vblank_events(dev, crtc);
}
EXPORT_SYMBOL(drm_handle_vblank);
INIT_LIST_HEAD(&dev->ctxlist);
INIT_LIST_HEAD(&dev->vmalist);
INIT_LIST_HEAD(&dev->maplist);
+ INIT_LIST_HEAD(&dev->vblank_event_list);
spin_lock_init(&dev->count_lock);
spin_lock_init(&dev->drw_lock);
+ spin_lock_init(&dev->event_lock);
init_timer(&dev->timer);
mutex_init(&dev->struct_mutex);
mutex_init(&dev->ctxlist_mutex);
.mmap = drm_gem_mmap,
.poll = drm_poll,
.fasync = drm_fasync,
+ .read = drm_read,
#ifdef CONFIG_COMPAT
.compat_ioctl = i915_compat_ioctl,
#endif
enum drm_vblank_seq_type {
_DRM_VBLANK_ABSOLUTE = 0x0, /**< Wait for specific vblank sequence number */
_DRM_VBLANK_RELATIVE = 0x1, /**< Wait for given number of vblanks */
+ _DRM_VBLANK_EVENT = 0x4000000, /**< Send event instead of blocking */
_DRM_VBLANK_FLIP = 0x8000000, /**< Scheduled buffer swap should flip */
_DRM_VBLANK_NEXTONMISS = 0x10000000, /**< If missed, wait for next vblank */
_DRM_VBLANK_SECONDARY = 0x20000000, /**< Secondary display controller */
};
#define _DRM_VBLANK_TYPES_MASK (_DRM_VBLANK_ABSOLUTE | _DRM_VBLANK_RELATIVE)
-#define _DRM_VBLANK_FLAGS_MASK (_DRM_VBLANK_SIGNAL | _DRM_VBLANK_SECONDARY | \
- _DRM_VBLANK_NEXTONMISS)
+#define _DRM_VBLANK_FLAGS_MASK (_DRM_VBLANK_EVENT | _DRM_VBLANK_SIGNAL | \
+ _DRM_VBLANK_SECONDARY | _DRM_VBLANK_NEXTONMISS)
struct drm_wait_vblank_request {
enum drm_vblank_seq_type type;
#define DRM_COMMAND_BASE 0x40
#define DRM_COMMAND_END 0xA0
+/**
+ * Header for events written back to userspace on the drm fd. The
+ * type defines the type of event, the length specifies the total
+ * length of the event (including the header), and user_data is
+ * typically a 64 bit value passed with the ioctl that triggered the
+ * event. A read on the drm fd will always only return complete
+ * events, that is, if for example the read buffer is 100 bytes, and
+ * there are two 64 byte events pending, only one will be returned.
+ *
+ * Event types 0 - 0x7fffffff are generic drm events, 0x80000000 and
+ * up are chipset specific.
+ */
+struct drm_event {
+ __u32 type;
+ __u32 length;
+};
+
+#define DRM_EVENT_VBLANK 0x01
+
+struct drm_event_vblank {
+ struct drm_event base;
+ __u64 user_data;
+ __u32 tv_sec;
+ __u32 tv_usec;
+ __u32 sequence;
+ __u32 reserved;
+};
+
/* typedef area */
#ifndef __KERNEL__
typedef struct drm_clip_rect drm_clip_rect_t;
struct drm_freelist freelist;
};
+/* Event queued up for userspace to read */
+struct drm_pending_event {
+ struct drm_event *event;
+ struct list_head link;
+ struct drm_file *file_priv;
+ void (*destroy)(struct drm_pending_event *event);
+};
+
/** File private data */
struct drm_file {
int authenticated;
struct drm_master *master; /* master this node is currently associated with
N.B. not always minor->master */
struct list_head fbs;
+
+ wait_queue_head_t event_wait;
+ struct list_head event_list;
+ int event_space;
};
/** Wait queue */
struct drm_mode_group mode_group;
};
+struct drm_pending_vblank_event {
+ struct drm_pending_event base;
+ int pipe;
+ struct drm_event_vblank event;
+};
+
/**
* DRM device structure. This structure represent a complete card that
* may contain multiple heads.
u32 max_vblank_count; /**< size of vblank counter register */
+ /**
+ * List of events
+ */
+ struct list_head vblank_event_list;
+ spinlock_t event_lock;
+
/*@} */
cycles_t ctx_start;
cycles_t lck_start;
extern int drm_open(struct inode *inode, struct file *filp);
extern int drm_stub_open(struct inode *inode, struct file *filp);
extern int drm_fasync(int fd, struct file *filp, int on);
+extern ssize_t drm_read(struct file *filp, char __user *buffer,
+ size_t count, loff_t *offset);
extern int drm_release(struct inode *inode, struct file *filp);
/* Mapping support (drm_vm.h) */
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff