[Intel-gfx] [PATCH 4/6] drm/i915: Duplicate and split the gen3/4 irq handler
Chris Wilson
chris at chris-wilson.co.uk
Tue Apr 24 19:31:29 CEST 2012
In preparation for rewriting the gen3 irq handler.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_irq.c | 811 ++++++++++++++++++++++++++-------------
1 file changed, 537 insertions(+), 274 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index d5bc3d7..b378555 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1381,144 +1381,6 @@ static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
}
}
-static irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
-{
- struct drm_device *dev = (struct drm_device *) arg;
- drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- struct drm_i915_master_private *master_priv;
- u32 iir, new_iir;
- u32 pipe_stats[I915_MAX_PIPES];
- u32 vblank_status;
- int vblank = 0;
- unsigned long irqflags;
- int irq_received;
- int ret = IRQ_NONE, pipe;
- bool blc_event = false;
-
- atomic_inc(&dev_priv->irq_received);
-
- iir = I915_READ(IIR);
-
- if (INTEL_INFO(dev)->gen >= 4)
- vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS;
- else
- vblank_status = PIPE_VBLANK_INTERRUPT_STATUS;
-
- for (;;) {
- irq_received = iir != 0;
-
- /* Can't rely on pipestat interrupt bit in iir as it might
- * have been cleared after the pipestat interrupt was received.
- * It doesn't set the bit in iir again, but it still produces
- * interrupts (for non-MSI).
- */
- spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
- if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
- i915_handle_error(dev, false);
-
- for_each_pipe(pipe) {
- int reg = PIPESTAT(pipe);
- pipe_stats[pipe] = I915_READ(reg);
-
- /*
- * Clear the PIPE*STAT regs before the IIR
- */
- if (pipe_stats[pipe] & 0x8000ffff) {
- if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
- DRM_DEBUG_DRIVER("pipe %c underrun\n",
- pipe_name(pipe));
- I915_WRITE(reg, pipe_stats[pipe]);
- irq_received = 1;
- }
- }
- spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
-
- if (!irq_received)
- break;
-
- ret = IRQ_HANDLED;
-
- /* Consume port. Then clear IIR or we'll miss events */
- if ((I915_HAS_HOTPLUG(dev)) &&
- (iir & I915_DISPLAY_PORT_INTERRUPT)) {
- u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
-
- DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
- hotplug_status);
- if (hotplug_status & dev_priv->hotplug_supported_mask)
- queue_work(dev_priv->wq,
- &dev_priv->hotplug_work);
-
- I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
- I915_READ(PORT_HOTPLUG_STAT);
- }
-
- I915_WRITE(IIR, iir);
- new_iir = I915_READ(IIR); /* Flush posted writes */
-
- if (dev->primary->master) {
- master_priv = dev->primary->master->driver_priv;
- if (master_priv->sarea_priv)
- master_priv->sarea_priv->last_dispatch =
- READ_BREADCRUMB(dev_priv);
- }
-
- if (iir & I915_USER_INTERRUPT)
- notify_ring(dev, &dev_priv->ring[RCS]);
- if (iir & I915_BSD_USER_INTERRUPT)
- notify_ring(dev, &dev_priv->ring[VCS]);
-
- if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
- intel_prepare_page_flip(dev, 0);
- if (dev_priv->gen3_flip_pending_is_done)
- intel_finish_page_flip_plane(dev, 0);
- }
-
- if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
- intel_prepare_page_flip(dev, 1);
- if (dev_priv->gen3_flip_pending_is_done)
- intel_finish_page_flip_plane(dev, 1);
- }
-
- for_each_pipe(pipe) {
- if (pipe_stats[pipe] & vblank_status &&
- drm_handle_vblank(dev, pipe)) {
- vblank++;
- if (!dev_priv->gen3_flip_pending_is_done) {
- i915_pageflip_stall_check(dev, pipe);
- intel_finish_page_flip(dev, pipe);
- }
- }
-
- if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
- blc_event = true;
- }
-
-
- if (blc_event || (iir & I915_ASLE_INTERRUPT))
- intel_opregion_asle_intr(dev);
-
- /* With MSI, interrupts are only generated when iir
- * transitions from zero to nonzero. If another bit got
- * set while we were handling the existing iir bits, then
- * we would never get another interrupt.
- *
- * This is fine on non-MSI as well, as if we hit this path
- * we avoid exiting the interrupt handler only to generate
- * another one.
- *
- * Note that for MSI this could cause a stray interrupt report
- * if an interrupt landed in the time between writing IIR and
- * the posting read. This should be rare enough to never
- * trigger the 99% of 100,000 interrupts test for disabling
- * stray interrupts.
- */
- iir = new_iir;
- }
-
- return ret;
-}
-
static int i915_emit_irq(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
@@ -2239,106 +2101,6 @@ static int valleyview_irq_postinstall(struct drm_device *dev)
return 0;
}
-static void i915_driver_irq_preinstall(struct drm_device * dev)
-{
- drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- int pipe;
-
- atomic_set(&dev_priv->irq_received, 0);
-
- if (I915_HAS_HOTPLUG(dev)) {
- I915_WRITE(PORT_HOTPLUG_EN, 0);
- I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
- }
-
- I915_WRITE(HWSTAM, 0xeffe);
- for_each_pipe(pipe)
- I915_WRITE(PIPESTAT(pipe), 0);
- I915_WRITE(IMR, 0xffffffff);
- I915_WRITE(IER, 0x0);
- POSTING_READ(IER);
-}
-
-/*
- * Must be called after intel_modeset_init or hotplug interrupts won't be
- * enabled correctly.
- */
-static int i915_driver_irq_postinstall(struct drm_device *dev)
-{
- drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
- u32 error_mask;
-
- dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
-
- /* Unmask the interrupts that we always want on. */
- dev_priv->irq_mask = ~I915_INTERRUPT_ENABLE_FIX;
-
- dev_priv->pipestat[0] = 0;
- dev_priv->pipestat[1] = 0;
-
- if (I915_HAS_HOTPLUG(dev)) {
- /* Enable in IER... */
- enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
- /* and unmask in IMR */
- dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
- }
-
- /*
- * Enable some error detection, note the instruction error mask
- * bit is reserved, so we leave it masked.
- */
- if (IS_G4X(dev)) {
- error_mask = ~(GM45_ERROR_PAGE_TABLE |
- GM45_ERROR_MEM_PRIV |
- GM45_ERROR_CP_PRIV |
- I915_ERROR_MEMORY_REFRESH);
- } else {
- error_mask = ~(I915_ERROR_PAGE_TABLE |
- I915_ERROR_MEMORY_REFRESH);
- }
- I915_WRITE(EMR, error_mask);
-
- I915_WRITE(IMR, dev_priv->irq_mask);
- I915_WRITE(IER, enable_mask);
- POSTING_READ(IER);
-
- if (I915_HAS_HOTPLUG(dev)) {
- u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
-
- /* Note HDMI and DP share bits */
- if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
- hotplug_en |= HDMIB_HOTPLUG_INT_EN;
- if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
- hotplug_en |= HDMIC_HOTPLUG_INT_EN;
- if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
- hotplug_en |= HDMID_HOTPLUG_INT_EN;
- if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
- hotplug_en |= SDVOC_HOTPLUG_INT_EN;
- if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
- hotplug_en |= SDVOB_HOTPLUG_INT_EN;
- if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
- hotplug_en |= CRT_HOTPLUG_INT_EN;
-
- /* Programming the CRT detection parameters tends
- to generate a spurious hotplug event about three
- seconds later. So just do it once.
- */
- if (IS_G4X(dev))
- hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
- hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
- }
-
- /* Ignore TV since it's buggy */
-
- I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
- }
-
- intel_opregion_enable_asle(dev);
-
- return 0;
-}
-
static void valleyview_irq_uninstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
@@ -2387,45 +2149,18 @@ static void ironlake_irq_uninstall(struct drm_device *dev)
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
}
-static void i915_driver_irq_uninstall(struct drm_device * dev)
+static void i8xx_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
- if (!dev_priv)
- return;
-
- dev_priv->vblank_pipe = 0;
-
- if (I915_HAS_HOTPLUG(dev)) {
- I915_WRITE(PORT_HOTPLUG_EN, 0);
- I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
- }
+ atomic_set(&dev_priv->irq_received, 0);
- I915_WRITE(HWSTAM, 0xffffffff);
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0);
- I915_WRITE(IMR, 0xffffffff);
- I915_WRITE(IER, 0x0);
-
- for_each_pipe(pipe)
- I915_WRITE(PIPESTAT(pipe),
- I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
- I915_WRITE(IIR, I915_READ(IIR));
-}
-
-static void i8xx_irq_preinstall(struct drm_device * dev)
-{
- drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- int pipe;
-
- atomic_set(&dev_priv->irq_received, 0);
-
- for_each_pipe(pipe)
- I915_WRITE(PIPESTAT(pipe), 0);
- I915_WRITE16(IMR, 0xffff);
- I915_WRITE16(IER, 0x0);
- POSTING_READ16(IER);
+ I915_WRITE16(IMR, 0xffff);
+ I915_WRITE16(IER, 0x0);
+ POSTING_READ16(IER);
}
static int i8xx_irq_postinstall(struct drm_device *dev)
@@ -2560,6 +2295,529 @@ static void i8xx_irq_uninstall(struct drm_device * dev)
I915_WRITE16(IIR, I915_READ16(IIR));
}
+static void i915_irq_preinstall(struct drm_device * dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ int pipe;
+
+ atomic_set(&dev_priv->irq_received, 0);
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ I915_WRITE(PORT_HOTPLUG_EN, 0);
+ I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
+ }
+
+ I915_WRITE(HWSTAM, 0xeffe);
+ for_each_pipe(pipe)
+ I915_WRITE(PIPESTAT(pipe), 0);
+ I915_WRITE(IMR, 0xffffffff);
+ I915_WRITE(IER, 0x0);
+ POSTING_READ(IER);
+}
+
+static int i915_irq_postinstall(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
+ u32 error_mask;
+
+ dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
+
+ /* Unmask the interrupts that we always want on. */
+ dev_priv->irq_mask = ~I915_INTERRUPT_ENABLE_FIX;
+
+ dev_priv->pipestat[0] = 0;
+ dev_priv->pipestat[1] = 0;
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ /* Enable in IER... */
+ enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
+ /* and unmask in IMR */
+ dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
+ }
+
+ /*
+ * Enable some error detection, note the instruction error mask
+ * bit is reserved, so we leave it masked.
+ */
+ if (IS_G4X(dev)) {
+ error_mask = ~(GM45_ERROR_PAGE_TABLE |
+ GM45_ERROR_MEM_PRIV |
+ GM45_ERROR_CP_PRIV |
+ I915_ERROR_MEMORY_REFRESH);
+ } else {
+ error_mask = ~(I915_ERROR_PAGE_TABLE |
+ I915_ERROR_MEMORY_REFRESH);
+ }
+ I915_WRITE(EMR, error_mask);
+
+ I915_WRITE(IMR, dev_priv->irq_mask);
+ I915_WRITE(IER, enable_mask);
+ POSTING_READ(IER);
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
+
+ /* Note HDMI and DP share bits */
+ if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
+ hotplug_en |= HDMIB_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
+ hotplug_en |= HDMIC_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
+ hotplug_en |= HDMID_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
+ hotplug_en |= SDVOC_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
+ hotplug_en |= SDVOB_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
+ hotplug_en |= CRT_HOTPLUG_INT_EN;
+
+ /* Programming the CRT detection parameters tends
+ to generate a spurious hotplug event about three
+ seconds later. So just do it once.
+ */
+ if (IS_G4X(dev))
+ hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
+ hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
+ }
+
+ /* Ignore TV since it's buggy */
+
+ I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
+ }
+
+ intel_opregion_enable_asle(dev);
+
+ return 0;
+}
+
+static irqreturn_t i915_irq_handler(DRM_IRQ_ARGS)
+{
+ struct drm_device *dev = (struct drm_device *) arg;
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ struct drm_i915_master_private *master_priv;
+ u32 iir, new_iir;
+ u32 pipe_stats[I915_MAX_PIPES];
+ u32 vblank_status;
+ int vblank = 0;
+ unsigned long irqflags;
+ int irq_received;
+ int ret = IRQ_NONE, pipe;
+ bool blc_event = false;
+
+ atomic_inc(&dev_priv->irq_received);
+
+ iir = I915_READ(IIR);
+
+ if (INTEL_INFO(dev)->gen >= 4)
+ vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS;
+ else
+ vblank_status = PIPE_VBLANK_INTERRUPT_STATUS;
+
+ for (;;) {
+ irq_received = iir != 0;
+
+ /* Can't rely on pipestat interrupt bit in iir as it might
+ * have been cleared after the pipestat interrupt was received.
+ * It doesn't set the bit in iir again, but it still produces
+ * interrupts (for non-MSI).
+ */
+ spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
+ if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
+ i915_handle_error(dev, false);
+
+ for_each_pipe(pipe) {
+ int reg = PIPESTAT(pipe);
+ pipe_stats[pipe] = I915_READ(reg);
+
+ /*
+ * Clear the PIPE*STAT regs before the IIR
+ */
+ if (pipe_stats[pipe] & 0x8000ffff) {
+ if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
+ DRM_DEBUG_DRIVER("pipe %c underrun\n",
+ pipe_name(pipe));
+ I915_WRITE(reg, pipe_stats[pipe]);
+ irq_received = 1;
+ }
+ }
+ spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
+
+ if (!irq_received)
+ break;
+
+ ret = IRQ_HANDLED;
+
+ /* Consume port. Then clear IIR or we'll miss events */
+ if ((I915_HAS_HOTPLUG(dev)) &&
+ (iir & I915_DISPLAY_PORT_INTERRUPT)) {
+ u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
+
+ DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
+ hotplug_status);
+ if (hotplug_status & dev_priv->hotplug_supported_mask)
+ queue_work(dev_priv->wq,
+ &dev_priv->hotplug_work);
+
+ I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
+ I915_READ(PORT_HOTPLUG_STAT);
+ }
+
+ I915_WRITE(IIR, iir);
+ new_iir = I915_READ(IIR); /* Flush posted writes */
+
+ if (dev->primary->master) {
+ master_priv = dev->primary->master->driver_priv;
+ if (master_priv->sarea_priv)
+ master_priv->sarea_priv->last_dispatch =
+ READ_BREADCRUMB(dev_priv);
+ }
+
+ if (iir & I915_USER_INTERRUPT)
+ notify_ring(dev, &dev_priv->ring[RCS]);
+ if (iir & I915_BSD_USER_INTERRUPT)
+ notify_ring(dev, &dev_priv->ring[VCS]);
+
+ if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
+ intel_prepare_page_flip(dev, 0);
+ if (dev_priv->gen3_flip_pending_is_done)
+ intel_finish_page_flip_plane(dev, 0);
+ }
+
+ if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
+ intel_prepare_page_flip(dev, 1);
+ if (dev_priv->gen3_flip_pending_is_done)
+ intel_finish_page_flip_plane(dev, 1);
+ }
+
+ for_each_pipe(pipe) {
+ if (pipe_stats[pipe] & vblank_status &&
+ drm_handle_vblank(dev, pipe)) {
+ vblank++;
+ if (!dev_priv->gen3_flip_pending_is_done) {
+ i915_pageflip_stall_check(dev, pipe);
+ intel_finish_page_flip(dev, pipe);
+ }
+ }
+
+ if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
+ blc_event = true;
+ }
+
+
+ if (blc_event || (iir & I915_ASLE_INTERRUPT))
+ intel_opregion_asle_intr(dev);
+
+ /* With MSI, interrupts are only generated when iir
+ * transitions from zero to nonzero. If another bit got
+ * set while we were handling the existing iir bits, then
+ * we would never get another interrupt.
+ *
+ * This is fine on non-MSI as well, as if we hit this path
+ * we avoid exiting the interrupt handler only to generate
+ * another one.
+ *
+ * Note that for MSI this could cause a stray interrupt report
+ * if an interrupt landed in the time between writing IIR and
+ * the posting read. This should be rare enough to never
+ * trigger the 99% of 100,000 interrupts test for disabling
+ * stray interrupts.
+ */
+ iir = new_iir;
+ }
+
+ return ret;
+}
+
+
+static void i915_irq_uninstall(struct drm_device * dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ int pipe;
+
+ if (!dev_priv)
+ return;
+
+ dev_priv->vblank_pipe = 0;
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ I915_WRITE(PORT_HOTPLUG_EN, 0);
+ I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
+ }
+
+ I915_WRITE(HWSTAM, 0xffffffff);
+ for_each_pipe(pipe)
+ I915_WRITE(PIPESTAT(pipe), 0);
+ I915_WRITE(IMR, 0xffffffff);
+ I915_WRITE(IER, 0x0);
+
+ for_each_pipe(pipe)
+ I915_WRITE(PIPESTAT(pipe),
+ I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
+ I915_WRITE(IIR, I915_READ(IIR));
+}
+
+static void i965_irq_preinstall(struct drm_device * dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ int pipe;
+
+ atomic_set(&dev_priv->irq_received, 0);
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ I915_WRITE(PORT_HOTPLUG_EN, 0);
+ I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
+ }
+
+ I915_WRITE(HWSTAM, 0xeffe);
+ for_each_pipe(pipe)
+ I915_WRITE(PIPESTAT(pipe), 0);
+ I915_WRITE(IMR, 0xffffffff);
+ I915_WRITE(IER, 0x0);
+ POSTING_READ(IER);
+}
+
+static int i965_irq_postinstall(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
+ u32 error_mask;
+
+ dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
+
+ /* Unmask the interrupts that we always want on. */
+ dev_priv->irq_mask = ~I915_INTERRUPT_ENABLE_FIX;
+
+ dev_priv->pipestat[0] = 0;
+ dev_priv->pipestat[1] = 0;
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ /* Enable in IER... */
+ enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
+ /* and unmask in IMR */
+ dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
+ }
+
+ /*
+ * Enable some error detection, note the instruction error mask
+ * bit is reserved, so we leave it masked.
+ */
+ if (IS_G4X(dev)) {
+ error_mask = ~(GM45_ERROR_PAGE_TABLE |
+ GM45_ERROR_MEM_PRIV |
+ GM45_ERROR_CP_PRIV |
+ I915_ERROR_MEMORY_REFRESH);
+ } else {
+ error_mask = ~(I915_ERROR_PAGE_TABLE |
+ I915_ERROR_MEMORY_REFRESH);
+ }
+ I915_WRITE(EMR, error_mask);
+
+ I915_WRITE(IMR, dev_priv->irq_mask);
+ I915_WRITE(IER, enable_mask);
+ POSTING_READ(IER);
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
+
+ /* Note HDMI and DP share bits */
+ if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
+ hotplug_en |= HDMIB_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
+ hotplug_en |= HDMIC_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
+ hotplug_en |= HDMID_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
+ hotplug_en |= SDVOC_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
+ hotplug_en |= SDVOB_HOTPLUG_INT_EN;
+ if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
+ hotplug_en |= CRT_HOTPLUG_INT_EN;
+
+ /* Programming the CRT detection parameters tends
+ to generate a spurious hotplug event about three
+ seconds later. So just do it once.
+ */
+ if (IS_G4X(dev))
+ hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
+ hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
+ }
+
+ /* Ignore TV since it's buggy */
+
+ I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
+ }
+
+ intel_opregion_enable_asle(dev);
+
+ return 0;
+}
+
+static irqreturn_t i965_irq_handler(DRM_IRQ_ARGS)
+{
+ struct drm_device *dev = (struct drm_device *) arg;
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ struct drm_i915_master_private *master_priv;
+ u32 iir, new_iir;
+ u32 pipe_stats[I915_MAX_PIPES];
+ u32 vblank_status;
+ int vblank = 0;
+ unsigned long irqflags;
+ int irq_received;
+ int ret = IRQ_NONE, pipe;
+ bool blc_event = false;
+
+ atomic_inc(&dev_priv->irq_received);
+
+ iir = I915_READ(IIR);
+
+ if (INTEL_INFO(dev)->gen >= 4)
+ vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS;
+ else
+ vblank_status = PIPE_VBLANK_INTERRUPT_STATUS;
+
+ for (;;) {
+ irq_received = iir != 0;
+
+ /* Can't rely on pipestat interrupt bit in iir as it might
+ * have been cleared after the pipestat interrupt was received.
+ * It doesn't set the bit in iir again, but it still produces
+ * interrupts (for non-MSI).
+ */
+ spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
+ if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
+ i915_handle_error(dev, false);
+
+ for_each_pipe(pipe) {
+ int reg = PIPESTAT(pipe);
+ pipe_stats[pipe] = I915_READ(reg);
+
+ /*
+ * Clear the PIPE*STAT regs before the IIR
+ */
+ if (pipe_stats[pipe] & 0x8000ffff) {
+ if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
+ DRM_DEBUG_DRIVER("pipe %c underrun\n",
+ pipe_name(pipe));
+ I915_WRITE(reg, pipe_stats[pipe]);
+ irq_received = 1;
+ }
+ }
+ spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
+
+ if (!irq_received)
+ break;
+
+ ret = IRQ_HANDLED;
+
+ /* Consume port. Then clear IIR or we'll miss events */
+ if ((I915_HAS_HOTPLUG(dev)) &&
+ (iir & I915_DISPLAY_PORT_INTERRUPT)) {
+ u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
+
+ DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
+ hotplug_status);
+ if (hotplug_status & dev_priv->hotplug_supported_mask)
+ queue_work(dev_priv->wq,
+ &dev_priv->hotplug_work);
+
+ I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
+ I915_READ(PORT_HOTPLUG_STAT);
+ }
+
+ I915_WRITE(IIR, iir);
+ new_iir = I915_READ(IIR); /* Flush posted writes */
+
+ if (dev->primary->master) {
+ master_priv = dev->primary->master->driver_priv;
+ if (master_priv->sarea_priv)
+ master_priv->sarea_priv->last_dispatch =
+ READ_BREADCRUMB(dev_priv);
+ }
+
+ if (iir & I915_USER_INTERRUPT)
+ notify_ring(dev, &dev_priv->ring[RCS]);
+ if (iir & I915_BSD_USER_INTERRUPT)
+ notify_ring(dev, &dev_priv->ring[VCS]);
+
+ if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
+ intel_prepare_page_flip(dev, 0);
+ if (dev_priv->gen3_flip_pending_is_done)
+ intel_finish_page_flip_plane(dev, 0);
+ }
+
+ if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
+ intel_prepare_page_flip(dev, 1);
+ if (dev_priv->gen3_flip_pending_is_done)
+ intel_finish_page_flip_plane(dev, 1);
+ }
+
+ for_each_pipe(pipe) {
+ if (pipe_stats[pipe] & vblank_status &&
+ drm_handle_vblank(dev, pipe)) {
+ vblank++;
+ if (!dev_priv->gen3_flip_pending_is_done) {
+ i915_pageflip_stall_check(dev, pipe);
+ intel_finish_page_flip(dev, pipe);
+ }
+ }
+
+ if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
+ blc_event = true;
+ }
+
+
+ if (blc_event || (iir & I915_ASLE_INTERRUPT))
+ intel_opregion_asle_intr(dev);
+
+ /* With MSI, interrupts are only generated when iir
+ * transitions from zero to nonzero. If another bit got
+ * set while we were handling the existing iir bits, then
+ * we would never get another interrupt.
+ *
+ * This is fine on non-MSI as well, as if we hit this path
+ * we avoid exiting the interrupt handler only to generate
+ * another one.
+ *
+ * Note that for MSI this could cause a stray interrupt report
+ * if an interrupt landed in the time between writing IIR and
+ * the posting read. This should be rare enough to never
+ * trigger the 99% of 100,000 interrupts test for disabling
+ * stray interrupts.
+ */
+ iir = new_iir;
+ }
+
+ return ret;
+}
+
+static void i965_irq_uninstall(struct drm_device * dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+ int pipe;
+
+ if (!dev_priv)
+ return;
+
+ dev_priv->vblank_pipe = 0;
+
+ if (I915_HAS_HOTPLUG(dev)) {
+ I915_WRITE(PORT_HOTPLUG_EN, 0);
+ I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
+ }
+
+ I915_WRITE(HWSTAM, 0xffffffff);
+ for_each_pipe(pipe)
+ I915_WRITE(PIPESTAT(pipe), 0);
+ I915_WRITE(IMR, 0xffffffff);
+ I915_WRITE(IER, 0x0);
+
+ for_each_pipe(pipe)
+ I915_WRITE(PIPESTAT(pipe),
+ I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
+ I915_WRITE(IIR, I915_READ(IIR));
+}
+
void intel_irq_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -2614,11 +2872,16 @@ void intel_irq_init(struct drm_device *dev)
dev->driver->irq_postinstall = i8xx_irq_postinstall;
dev->driver->irq_handler = i8xx_irq_handler;
dev->driver->irq_uninstall = i8xx_irq_uninstall;
+ } else if (INTEL_INFO(dev)->gen == 3) {
+ dev->driver->irq_preinstall = i915_irq_preinstall;
+ dev->driver->irq_postinstall = i915_irq_postinstall;
+ dev->driver->irq_uninstall = i915_irq_uninstall;
+ dev->driver->irq_handler = i915_irq_handler;
} else {
- dev->driver->irq_preinstall = i915_driver_irq_preinstall;
- dev->driver->irq_postinstall = i915_driver_irq_postinstall;
- dev->driver->irq_uninstall = i915_driver_irq_uninstall;
- dev->driver->irq_handler = i915_driver_irq_handler;
+ dev->driver->irq_preinstall = i965_irq_preinstall;
+ dev->driver->irq_postinstall = i965_irq_postinstall;
+ dev->driver->irq_uninstall = i965_irq_uninstall;
+ dev->driver->irq_handler = i965_irq_handler;
}
dev->driver->enable_vblank = i915_enable_vblank;
dev->driver->disable_vblank = i915_disable_vblank;
--
1.7.10
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