diff options
Diffstat (limited to 'shared-core/mga_irq.c')
| -rw-r--r-- | shared-core/mga_irq.c | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/shared-core/mga_irq.c b/shared-core/mga_irq.c index 99a23fe1..16dfd44b 100644 --- a/shared-core/mga_irq.c +++ b/shared-core/mga_irq.c @@ -40,6 +40,7 @@ irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) drm_device_t *dev = (drm_device_t *) arg; drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; int status; + int handled = 0; status = MGA_READ(MGA_STATUS); @@ -49,6 +50,30 @@ irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) atomic_inc(&dev->vbl_received); DRM_WAKEUP(&dev->vbl_queue); 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; @@ -72,6 +97,25 @@ int mga_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence) return ret; } +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; @@ -86,8 +130,10 @@ void mga_driver_irq_postinstall(drm_device_t * dev) { drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - /* Turn on VBL interrupt */ - MGA_WRITE(MGA_IEN, MGA_VLINEIEN); + DRM_INIT_WAITQUEUE( &dev_priv->fence_queue ); + + /* 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) |