diff options
Diffstat (limited to 'drivers/char/drm/mga_irq.c')
| -rw-r--r-- | drivers/char/drm/mga_irq.c | 72 |
1 files changed, 60 insertions, 12 deletions
diff --git a/drivers/char/drm/mga_irq.c b/drivers/char/drm/mga_irq.c index bc0b6b5d43a6d..52eaa4e788f91 100644 --- a/drivers/char/drm/mga_irq.c +++ b/drivers/char/drm/mga_irq.c @@ -41,15 +41,40 @@ irqreturn_t mga_driver_irq_handler( DRM_IRQ_ARGS ) drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private; int status; + int handled = 0; + + status = MGA_READ(MGA_STATUS); - status = MGA_READ( MGA_STATUS ); - /* VBLANK interrupt */ if ( status & MGA_VLINEPEN ) { MGA_WRITE( MGA_ICLEAR, MGA_VLINEICLR ); atomic_inc(&dev->vbl_received); DRM_WAKEUP(&dev->vbl_queue); - drm_vbl_send_signals( dev ); + drm_vbl_send_signals(dev); + handled = 1; + } + + /* SOFTRAP interrupt */ + if (status & MGA_SOFTRAPEN) { + const u32 prim_start = MGA_READ(MGA_PRIMADDRESS); + const u32 prim_end = MGA_READ(MGA_PRIMEND); + + + MGA_WRITE(MGA_ICLEAR, MGA_SOFTRAPICLR); + + /* In addition to clearing the interrupt-pending bit, we + * have to write to MGA_PRIMEND to re-start the DMA operation. + */ + if ( (prim_start & ~0x03) != (prim_end & ~0x03) ) { + MGA_WRITE(MGA_PRIMEND, prim_end); + } + + atomic_inc(&dev_priv->last_fence_retired); + DRM_WAKEUP(&dev_priv->fence_queue); + handled = 1; + } + + if ( handled ) { return IRQ_HANDLED; } return IRQ_NONE; @@ -73,9 +98,28 @@ int mga_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence) return ret; } -void mga_driver_irq_preinstall( drm_device_t *dev ) { - drm_mga_private_t *dev_priv = - (drm_mga_private_t *)dev->dev_private; +int mga_driver_fence_wait(drm_device_t * dev, unsigned int *sequence) +{ + drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; + unsigned int cur_fence; + int ret = 0; + + /* Assume that the user has missed the current sequence number + * by about a day rather than she wants to wait for years + * using fences. + */ + DRM_WAIT_ON(ret, dev_priv->fence_queue, 3 * DRM_HZ, + (((cur_fence = atomic_read(&dev_priv->last_fence_retired)) + - *sequence) <= (1 << 23))); + + *sequence = cur_fence; + + return ret; +} + +void mga_driver_irq_preinstall(drm_device_t * dev) +{ + drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; /* Disable *all* interrupts */ MGA_WRITE( MGA_IEN, 0 ); @@ -83,12 +127,14 @@ void mga_driver_irq_preinstall( drm_device_t *dev ) { MGA_WRITE( MGA_ICLEAR, ~0 ); } -void mga_driver_irq_postinstall( drm_device_t *dev ) { - drm_mga_private_t *dev_priv = - (drm_mga_private_t *)dev->dev_private; +void mga_driver_irq_postinstall(drm_device_t * dev) +{ + drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; + + DRM_INIT_WAITQUEUE( &dev_priv->fence_queue ); - /* Turn on VBL interrupt */ - MGA_WRITE( MGA_IEN, MGA_VLINEIEN ); + /* Turn on vertical blank interrupt and soft trap interrupt. */ + MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); } void mga_driver_irq_uninstall( drm_device_t *dev ) { @@ -98,5 +144,7 @@ void mga_driver_irq_uninstall( drm_device_t *dev ) { return; /* Disable *all* interrupts */ - MGA_WRITE( MGA_IEN, 0 ); + MGA_WRITE(MGA_IEN, 0); + + dev->irq_enabled = 0; } |