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path: root/shared-core/i915_irq.c
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Diffstat (limited to 'shared-core/i915_irq.c')
-rw-r--r--shared-core/i915_irq.c99
1 files changed, 74 insertions, 25 deletions
diff --git a/shared-core/i915_irq.c b/shared-core/i915_irq.c
index 2287cd0c..37d85f40 100644
--- a/shared-core/i915_irq.c
+++ b/shared-core/i915_irq.c
@@ -435,6 +435,28 @@ u32 i915_get_vblank_counter(struct drm_device *dev, int plane)
return count;
}
+/**
+ * Handler for user interrupts in process context (able to sleep, do VFS
+ * operations, etc.
+ *
+ * If another IRQ comes in while we're in this handler, it will still get put
+ * on the queue again to be rerun when we finish.
+ */
+void
+i915_user_interrupt_handler(struct work_struct *work)
+{
+ drm_i915_private_t *dev_priv;
+ struct drm_device *dev;
+
+ dev_priv = container_of(work, drm_i915_private_t,
+ user_interrupt_task);
+ dev = dev_priv->dev;
+
+ mutex_lock(&dev->struct_mutex);
+ i915_gem_retire_requests(dev);
+ mutex_unlock(&dev->struct_mutex);
+}
+
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
@@ -485,13 +507,14 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
if (dev_priv->sarea_priv)
dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
- I915_WRITE(I915REG_INT_IDENTITY_R, iir);
+ I915_WRITE(I915REG_INT_IDENTITY_R, iir | I915_USER_INTERRUPT);
(void) I915_READ(I915REG_INT_IDENTITY_R); /* Flush posted write */
if (iir & I915_USER_INTERRUPT) {
DRM_WAKEUP(&dev_priv->irq_queue);
#ifdef I915_HAVE_FENCE
i915_fence_handler(dev);
+ schedule_work(&dev_priv->user_interrupt_task);
#endif
}
@@ -526,8 +549,9 @@ void i915_user_irq_on(drm_i915_private_t *dev_priv)
{
DRM_SPINLOCK(&dev_priv->user_irq_lock);
if (dev_priv->irq_enabled && (++dev_priv->user_irq_refcount == 1)){
- dev_priv->irq_enable_reg |= I915_USER_INTERRUPT;
- I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
+ dev_priv->irq_mask_reg &= ~I915_USER_INTERRUPT;
+ I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
+ (void) I915_READ (I915REG_INT_ENABLE_R);
}
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
@@ -536,15 +560,17 @@ void i915_user_irq_on(drm_i915_private_t *dev_priv)
void i915_user_irq_off(drm_i915_private_t *dev_priv)
{
DRM_SPINLOCK(&dev_priv->user_irq_lock);
+ BUG_ON(dev_priv->user_irq_refcount <= 0);
if (dev_priv->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
- // dev_priv->irq_enable_reg &= ~USER_INT_FLAG;
- // I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
+ dev_priv->irq_mask_reg |= I915_USER_INTERRUPT;
+ I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
+ (void) I915_READ(I915REG_INT_MASK_R);
}
DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
}
-static int i915_wait_irq(struct drm_device * dev, int irq_nr)
+int i915_wait_irq(struct drm_device * dev, int irq_nr)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int ret = 0;
@@ -618,16 +644,17 @@ int i915_enable_vblank(struct drm_device *dev, int plane)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe = i915_get_pipe(dev, plane);
u32 pipestat_reg = 0;
+ u32 mask_reg = 0;
u32 pipestat;
switch (pipe) {
case 0:
pipestat_reg = I915REG_PIPEASTAT;
- dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
+ mask_reg |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
break;
case 1:
pipestat_reg = I915REG_PIPEBSTAT;
- dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
+ mask_reg |= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
break;
default:
DRM_ERROR("tried to enable vblank on non-existent pipe %d\n",
@@ -653,7 +680,11 @@ int i915_enable_vblank(struct drm_device *dev, int plane)
I915_VBLANK_INTERRUPT_STATUS);
I915_WRITE(pipestat_reg, pipestat);
}
- I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
+ DRM_SPINLOCK(&dev_priv->user_irq_lock);
+ dev_priv->irq_mask_reg &= ~mask_reg;
+ I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
+ I915_READ(I915REG_INT_MASK_R);
+ DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
return 0;
}
@@ -663,16 +694,17 @@ void i915_disable_vblank(struct drm_device *dev, int plane)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe = i915_get_pipe(dev, plane);
u32 pipestat_reg = 0;
+ u32 mask_reg = 0;
u32 pipestat;
switch (pipe) {
case 0:
pipestat_reg = I915REG_PIPEASTAT;
- dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
+ mask_reg |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
break;
case 1:
pipestat_reg = I915REG_PIPEBSTAT;
- dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
+ mask_reg |= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
break;
default:
DRM_ERROR("tried to disable vblank on non-existent pipe %d\n",
@@ -680,7 +712,11 @@ void i915_disable_vblank(struct drm_device *dev, int plane)
break;
}
- I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
+ DRM_SPINLOCK(&dev_priv->user_irq_lock);
+ dev_priv->irq_mask_reg |= mask_reg;
+ I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
+ (void) I915_READ (I915REG_INT_MASK_R);
+ DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
if (pipestat_reg)
{
pipestat = I915_READ (pipestat_reg);
@@ -692,6 +728,7 @@ void i915_disable_vblank(struct drm_device *dev, int plane)
pipestat |= (I915_START_VBLANK_INTERRUPT_STATUS |
I915_VBLANK_INTERRUPT_STATUS);
I915_WRITE(pipestat_reg, pipestat);
+ (void) I915_READ(pipestat_reg);
}
}
@@ -699,12 +736,27 @@ static void i915_enable_interrupt (struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- dev_priv->irq_enable_reg |= I915_USER_INTERRUPT;
-
- I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
+ dev_priv->irq_mask_reg = (I915_USER_INTERRUPT |
+ I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
+ I915_DISPLAY_PIPE_B_EVENT_INTERRUPT);
+ I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
+ I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_mask_reg);
+ (void) I915_READ (I915REG_INT_ENABLE_R);
dev_priv->irq_enabled = 1;
}
+static void i915_disable_interrupt (struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+
+ I915_WRITE(I915REG_HWSTAM, 0xffffffff);
+ I915_WRITE(I915REG_INT_MASK_R, 0xffffffff);
+ I915_WRITE(I915REG_INT_ENABLE_R, 0);
+ I915_WRITE(I915REG_INT_IDENTITY_R, 0xffffffff);
+ (void) I915_READ (I915REG_INT_IDENTITY_R);
+ dev_priv->irq_enabled = 0;
+}
+
/* Set the vblank monitor pipe
*/
int i915_vblank_pipe_set(struct drm_device *dev, void *data,
@@ -910,9 +962,11 @@ void i915_driver_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- I915_WRITE16(I915REG_HWSTAM, 0xeffe);
- I915_WRITE16(I915REG_INT_MASK_R, 0x0);
- I915_WRITE16(I915REG_INT_ENABLE_R, 0x0);
+ I915_WRITE(I915REG_HWSTAM, 0xffff);
+ I915_WRITE(I915REG_INT_ENABLE_R, 0x0);
+ I915_WRITE(I915REG_INT_MASK_R, 0xffffffff);
+ I915_WRITE(I915REG_INT_IDENTITY_R, 0xffffffff);
+ (void) I915_READ(I915REG_INT_IDENTITY_R);
}
int i915_driver_irq_postinstall(struct drm_device * dev)
@@ -926,7 +980,7 @@ int i915_driver_irq_postinstall(struct drm_device * dev)
DRM_SPININIT(&dev_priv->user_irq_lock, "userirq");
dev_priv->user_irq_refcount = 0;
- dev_priv->irq_enable_reg = 0;
+ dev_priv->irq_mask_reg = 0;
ret = drm_vblank_init(dev, num_pipes);
if (ret)
@@ -953,15 +1007,10 @@ void i915_driver_irq_uninstall(struct drm_device * dev)
if (!dev_priv)
return;
- dev_priv->irq_enabled = 0;
- I915_WRITE(I915REG_HWSTAM, 0xffffffff);
- I915_WRITE(I915REG_INT_MASK_R, 0xffffffff);
- I915_WRITE(I915REG_INT_ENABLE_R, 0x0);
+ i915_disable_interrupt (dev);
temp = I915_READ(I915REG_PIPEASTAT);
I915_WRITE(I915REG_PIPEASTAT, temp);
temp = I915_READ(I915REG_PIPEBSTAT);
I915_WRITE(I915REG_PIPEBSTAT, temp);
- temp = I915_READ(I915REG_INT_IDENTITY_R);
- I915_WRITE(I915REG_INT_IDENTITY_R, temp);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 15:04:17 +0000