/**
- * \file drm_irq.h
+ * \file drm_irq.c
* IRQ support
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
/**
* Get interrupt from bus id.
- *
+ *
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg user argument, pointing to a drm_irq_busid structure.
* \return zero on success or a negative number on failure.
- *
+ *
* Finds the PCI device with the specified bus id and gets its IRQ number.
* This IOCTL is deprecated, and will now return EINVAL for any busid not equal
* to that of the device that this DRM instance attached to.
*/
int drm_irq_by_busid(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
+ drm_device_t *dev = priv->head->dev;
drm_irq_busid_t __user *argp = (void __user *)arg;
drm_irq_busid_t p;
if (copy_from_user(&p, argp, sizeof(p)))
return -EFAULT;
- if ((p.busnum >> 8) != dev->pci_domain ||
- (p.busnum & 0xff) != dev->pci_bus ||
- p.devnum != dev->pci_slot ||
- p.funcnum != dev->pci_func)
+ if ((p.busnum >> 8) != drm_get_pci_domain(dev) ||
+ (p.busnum & 0xff) != dev->pdev->bus->number ||
+ p.devnum != PCI_SLOT(dev->pdev->devfn) || p.funcnum != PCI_FUNC(dev->pdev->devfn))
return -EINVAL;
p.irq = dev->irq;
- DRM_DEBUG("%d:%d:%d => IRQ %d\n",
- p.busnum, p.devnum, p.funcnum, p.irq);
+ DRM_DEBUG("%d:%d:%d => IRQ %d\n", p.busnum, p.devnum, p.funcnum, p.irq);
if (copy_to_user(argp, &p, sizeof(p)))
return -EFAULT;
return 0;
* \c drm_driver_irq_preinstall() and \c drm_driver_irq_postinstall() functions
* before and after the installation.
*/
-int drm_irq_install( drm_device_t *dev )
+static int drm_irq_install(drm_device_t * dev)
{
int ret;
- unsigned long sh_flags=0;
+ unsigned long sh_flags = 0;
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return -EINVAL;
- if ( dev->irq == 0 )
+ if (dev->irq == 0)
return -EINVAL;
- down( &dev->struct_sem );
+ mutex_lock(&dev->struct_mutex);
/* Driver must have been initialized */
- if ( !dev->dev_private ) {
- up( &dev->struct_sem );
+ if (!dev->dev_private) {
+ mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
- if ( dev->irq_enabled ) {
- up( &dev->struct_sem );
+ if (dev->irq_enabled) {
+ mutex_unlock(&dev->struct_mutex);
return -EBUSY;
}
dev->irq_enabled = 1;
- up( &dev->struct_sem );
+ mutex_unlock(&dev->struct_mutex);
- DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
+ DRM_DEBUG("%s: irq=%d\n", __FUNCTION__, dev->irq);
if (drm_core_check_feature(dev, DRIVER_IRQ_VBL)) {
init_waitqueue_head(&dev->vbl_queue);
-
- spin_lock_init( &dev->vbl_lock );
-
- INIT_LIST_HEAD( &dev->vbl_sigs.head );
-
+
+ spin_lock_init(&dev->vbl_lock);
+
+ INIT_LIST_HEAD(&dev->vbl_sigs.head);
+ INIT_LIST_HEAD(&dev->vbl_sigs2.head);
+
dev->vbl_pending = 0;
}
- /* Before installing handler */
+ /* Before installing handler */
dev->driver->irq_preinstall(dev);
- /* Install handler */
+ /* Install handler */
if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED))
- sh_flags = SA_SHIRQ;
-
- ret = request_irq( dev->irq, dev->driver->irq_handler,
- sh_flags, dev->devname, dev );
- if ( ret < 0 ) {
- down( &dev->struct_sem );
+ sh_flags = IRQF_SHARED;
+
+ ret = request_irq(dev->irq, dev->driver->irq_handler,
+ sh_flags, dev->devname, dev);
+ if (ret < 0) {
+ mutex_lock(&dev->struct_mutex);
dev->irq_enabled = 0;
- up( &dev->struct_sem );
+ mutex_unlock(&dev->struct_mutex);
return ret;
}
- /* After installing handler */
+ /* After installing handler */
dev->driver->irq_postinstall(dev);
return 0;
*
* Calls the driver's \c drm_driver_irq_uninstall() function, and stops the irq.
*/
-int drm_irq_uninstall( drm_device_t *dev )
+int drm_irq_uninstall(drm_device_t * dev)
{
int irq_enabled;
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return -EINVAL;
- down( &dev->struct_sem );
+ mutex_lock(&dev->struct_mutex);
irq_enabled = dev->irq_enabled;
dev->irq_enabled = 0;
- up( &dev->struct_sem );
+ mutex_unlock(&dev->struct_mutex);
- if ( !irq_enabled )
+ if (!irq_enabled)
return -EINVAL;
- DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
+ DRM_DEBUG("%s: irq=%d\n", __FUNCTION__, dev->irq);
dev->driver->irq_uninstall(dev);
- free_irq( dev->irq, dev );
+ free_irq(dev->irq, dev);
+
+ dev->locked_tasklet_func = NULL;
return 0;
}
+
EXPORT_SYMBOL(drm_irq_uninstall);
/**
*
* Calls irq_install() or irq_uninstall() according to \p arg.
*/
-int drm_control( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_control(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
+ drm_device_t *dev = priv->head->dev;
drm_control_t ctl;
-
+
/* if we haven't irq we fallback for compatibility reasons - this used to be a separate function in drm_dma.h */
- if ( copy_from_user( &ctl, (drm_control_t __user *)arg, sizeof(ctl) ) )
+ if (copy_from_user(&ctl, (drm_control_t __user *) arg, sizeof(ctl)))
return -EFAULT;
- switch ( ctl.func ) {
+ switch (ctl.func) {
case DRM_INST_HANDLER:
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
if (dev->if_version < DRM_IF_VERSION(1, 2) &&
ctl.irq != dev->irq)
return -EINVAL;
- return drm_irq_install( dev );
+ return drm_irq_install(dev);
case DRM_UNINST_HANDLER:
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
- return drm_irq_uninstall( dev );
+ return drm_irq_uninstall(dev);
default:
return -EINVAL;
}
* \param data user argument, pointing to a drm_wait_vblank structure.
* \return zero on success or a negative number on failure.
*
- * Verifies the IRQ is installed.
+ * Verifies the IRQ is installed.
*
* If a signal is requested checks if this task has already scheduled the same signal
* for the same vblank sequence number - nothing to be done in
*
* If a signal is not requested, then calls vblank_wait().
*/
-int drm_wait_vblank( DRM_IOCTL_ARGS )
+int drm_wait_vblank(DRM_IOCTL_ARGS)
{
drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
+ drm_device_t *dev = priv->head->dev;
drm_wait_vblank_t __user *argp = (void __user *)data;
drm_wait_vblank_t vblwait;
struct timeval now;
int ret = 0;
- unsigned int flags;
+ unsigned int flags, seq;
- if (!drm_core_check_feature(dev, DRIVER_IRQ_VBL))
+ if (!dev->irq)
return -EINVAL;
- if (!dev->irq)
+ if (copy_from_user(&vblwait, argp, sizeof(vblwait)))
+ return -EFAULT;
+
+ if (vblwait.request.type &
+ ~(_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK)) {
+ DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n",
+ vblwait.request.type,
+ (_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK));
return -EINVAL;
+ }
- DRM_COPY_FROM_USER_IOCTL( vblwait, argp, sizeof(vblwait) );
+ flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK;
- switch ( vblwait.request.type & ~_DRM_VBLANK_FLAGS_MASK ) {
+ if (!drm_core_check_feature(dev, (flags & _DRM_VBLANK_SECONDARY) ?
+ DRIVER_IRQ_VBL2 : DRIVER_IRQ_VBL))
+ return -EINVAL;
+
+ seq = atomic_read((flags & _DRM_VBLANK_SECONDARY) ? &dev->vbl_received2
+ : &dev->vbl_received);
+
+ switch (vblwait.request.type & _DRM_VBLANK_TYPES_MASK) {
case _DRM_VBLANK_RELATIVE:
- vblwait.request.sequence += atomic_read( &dev->vbl_received );
+ vblwait.request.sequence += seq;
vblwait.request.type &= ~_DRM_VBLANK_RELATIVE;
case _DRM_VBLANK_ABSOLUTE:
break;
return -EINVAL;
}
- flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK;
-
- if ( flags & _DRM_VBLANK_SIGNAL ) {
+ if ((flags & _DRM_VBLANK_NEXTONMISS) &&
+ (seq - vblwait.request.sequence) <= (1<<23)) {
+ vblwait.request.sequence = seq + 1;
+ }
+
+ if (flags & _DRM_VBLANK_SIGNAL) {
unsigned long irqflags;
+ drm_vbl_sig_t *vbl_sigs = (flags & _DRM_VBLANK_SECONDARY)
+ ? &dev->vbl_sigs2 : &dev->vbl_sigs;
drm_vbl_sig_t *vbl_sig;
-
- vblwait.reply.sequence = atomic_read( &dev->vbl_received );
- spin_lock_irqsave( &dev->vbl_lock, irqflags );
+ spin_lock_irqsave(&dev->vbl_lock, irqflags);
/* Check if this task has already scheduled the same signal
* for the same vblank sequence number; nothing to be done in
* that case
*/
- list_for_each_entry( vbl_sig, &dev->vbl_sigs.head, head ) {
+ list_for_each_entry(vbl_sig, &vbl_sigs->head, head) {
if (vbl_sig->sequence == vblwait.request.sequence
&& vbl_sig->info.si_signo == vblwait.request.signal
- && vbl_sig->task == current)
- {
- spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+ && vbl_sig->task == current) {
+ spin_unlock_irqrestore(&dev->vbl_lock,
+ irqflags);
+ vblwait.reply.sequence = seq;
goto done;
}
}
- if ( dev->vbl_pending >= 100 ) {
- spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+ if (dev->vbl_pending >= 100) {
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
return -EBUSY;
}
dev->vbl_pending++;
- spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
- if ( !( vbl_sig = drm_alloc( sizeof( drm_vbl_sig_t ), DRM_MEM_DRIVER ) ) ) {
+ if (!
+ (vbl_sig =
+ drm_alloc(sizeof(drm_vbl_sig_t), DRM_MEM_DRIVER))) {
return -ENOMEM;
}
- memset( (void *)vbl_sig, 0, sizeof(*vbl_sig) );
+ memset((void *)vbl_sig, 0, sizeof(*vbl_sig));
vbl_sig->sequence = vblwait.request.sequence;
vbl_sig->info.si_signo = vblwait.request.signal;
vbl_sig->task = current;
- spin_lock_irqsave( &dev->vbl_lock, irqflags );
+ spin_lock_irqsave(&dev->vbl_lock, irqflags);
- list_add_tail( (struct list_head *) vbl_sig, &dev->vbl_sigs.head );
+ list_add_tail((struct list_head *)vbl_sig, &vbl_sigs->head);
- spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
- } else {
- if (dev->driver->vblank_wait)
- ret = dev->driver->vblank_wait( dev, &vblwait.request.sequence );
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
- do_gettimeofday( &now );
+ vblwait.reply.sequence = seq;
+ } else {
+ if (flags & _DRM_VBLANK_SECONDARY) {
+ if (dev->driver->vblank_wait2)
+ ret = dev->driver->vblank_wait2(dev, &vblwait.request.sequence);
+ } else if (dev->driver->vblank_wait)
+ ret =
+ dev->driver->vblank_wait(dev,
+ &vblwait.request.sequence);
+
+ do_gettimeofday(&now);
vblwait.reply.tval_sec = now.tv_sec;
vblwait.reply.tval_usec = now.tv_usec;
}
-done:
- DRM_COPY_TO_USER_IOCTL( argp, vblwait, sizeof(vblwait) );
+ done:
+ if (copy_to_user(argp, &vblwait, sizeof(vblwait)))
+ return -EFAULT;
return ret;
}
*
* If a signal is not requested, then calls vblank_wait().
*/
-void drm_vbl_send_signals( drm_device_t *dev )
+void drm_vbl_send_signals(drm_device_t * dev)
{
- struct list_head *list, *tmp;
- drm_vbl_sig_t *vbl_sig;
- unsigned int vbl_seq = atomic_read( &dev->vbl_received );
unsigned long flags;
+ int i;
- spin_lock_irqsave( &dev->vbl_lock, flags );
+ spin_lock_irqsave(&dev->vbl_lock, flags);
+
+ for (i = 0; i < 2; i++) {
+ struct list_head *list, *tmp;
+ drm_vbl_sig_t *vbl_sig;
+ drm_vbl_sig_t *vbl_sigs = i ? &dev->vbl_sigs2 : &dev->vbl_sigs;
+ unsigned int vbl_seq = atomic_read(i ? &dev->vbl_received2 :
+ &dev->vbl_received);
- list_for_each_safe( list, tmp, &dev->vbl_sigs.head ) {
- vbl_sig = list_entry( list, drm_vbl_sig_t, head );
- if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
- vbl_sig->info.si_code = vbl_seq;
- send_sig_info( vbl_sig->info.si_signo, &vbl_sig->info, vbl_sig->task );
+ list_for_each_safe(list, tmp, &vbl_sigs->head) {
+ vbl_sig = list_entry(list, drm_vbl_sig_t, head);
+ if ((vbl_seq - vbl_sig->sequence) <= (1 << 23)) {
+ vbl_sig->info.si_code = vbl_seq;
+ send_sig_info(vbl_sig->info.si_signo,
+ &vbl_sig->info, vbl_sig->task);
- list_del( list );
+ list_del(list);
- drm_free( vbl_sig, sizeof(*vbl_sig), DRM_MEM_DRIVER );
+ drm_free(vbl_sig, sizeof(*vbl_sig),
+ DRM_MEM_DRIVER);
- dev->vbl_pending--;
+ dev->vbl_pending--;
+ }
}
}
- spin_unlock_irqrestore( &dev->vbl_lock, flags );
+ spin_unlock_irqrestore(&dev->vbl_lock, flags);
}
+
EXPORT_SYMBOL(drm_vbl_send_signals);
+/**
+ * Tasklet wrapper function.
+ *
+ * \param data DRM device in disguise.
+ *
+ * Attempts to grab the HW lock and calls the driver callback on success. On
+ * failure, leave the lock marked as contended so the callback can be called
+ * from drm_unlock().
+ */
+static void drm_locked_tasklet_func(unsigned long data)
+{
+ drm_device_t *dev = (drm_device_t*)data;
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&dev->tasklet_lock, irqflags);
+
+ if (!dev->locked_tasklet_func ||
+ !drm_lock_take(&dev->lock.hw_lock->lock,
+ DRM_KERNEL_CONTEXT)) {
+ spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
+ return;
+ }
+
+ dev->lock.lock_time = jiffies;
+ atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
+
+ dev->locked_tasklet_func(dev);
+
+ drm_lock_free(dev, &dev->lock.hw_lock->lock,
+ DRM_KERNEL_CONTEXT);
+
+ dev->locked_tasklet_func = NULL;
+
+ spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
+}
+
+/**
+ * Schedule a tasklet to call back a driver hook with the HW lock held.
+ *
+ * \param dev DRM device.
+ * \param func Driver callback.
+ *
+ * This is intended for triggering actions that require the HW lock from an
+ * interrupt handler. The lock will be grabbed ASAP after the interrupt handler
+ * completes. Note that the callback may be called from interrupt or process
+ * context, it must not make any assumptions about this. Also, the HW lock will
+ * be held with the kernel context or any client context.
+ */
+void drm_locked_tasklet(drm_device_t *dev, void (*func)(drm_device_t*))
+{
+ unsigned long irqflags;
+ static DECLARE_TASKLET(drm_tasklet, drm_locked_tasklet_func, 0);
+
+ if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ) ||
+ test_bit(TASKLET_STATE_SCHED, &drm_tasklet.state))
+ return;
+ spin_lock_irqsave(&dev->tasklet_lock, irqflags);
+
+ if (dev->locked_tasklet_func) {
+ spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
+ return;
+ }
+
+ dev->locked_tasklet_func = func;
+
+ spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
+
+ drm_tasklet.data = (unsigned long)dev;
+
+ tasklet_hi_schedule(&drm_tasklet);
+}
+EXPORT_SYMBOL(drm_locked_tasklet);
git://git.onelab.eu / linux-2.6.git / blobdiff