diff mbox series

[28/30] drm/i915/guc: Correctly handle GuC interrupts on Gen11

Message ID 20190329221118.17308-29-michal.wajdeczko@intel.com (mailing list archive)
State New, archived
Headers show
Series GuC 32.0.3 | expand

Commit Message

Michal Wajdeczko March 29, 2019, 10:11 p.m. UTC 
From: Oscar Mateo <oscar.mateo@intel.com>

The GuC interrupts now get their own interrupt vector (instead of
sharing a register with the PM interrupts) so handle appropriately.

Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h      |  6 ++-
 drivers/gpu/drm/i915/i915_irq.c      | 76 +++++++++++++++++++++++++---
 drivers/gpu/drm/i915/i915_reg.h      |  1 +
 drivers/gpu/drm/i915/intel_guc_reg.h | 18 +++++++
 4 files changed, 94 insertions(+), 7 deletions(-)

Comments

Chris Wilson March 29, 2019, 10:37 p.m. UTC | #1 
Quoting Michal Wajdeczko (2019-03-29 22:11:16)
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 3dd971c09d52..c1b4fbd5f496 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -573,6 +573,44 @@ static void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv)
>         gen9_reset_guc_interrupts(dev_priv);
>  }
>  
> +static void gen11_reset_guc_interrupts(struct drm_i915_private *dev_priv)
> +{
> +       spin_lock_irq(&dev_priv->irq_lock);
> +
> +       while (gen11_reset_one_iir(dev_priv, 0, GEN11_GUC))
> +               ;

I have to say this and gen11_reset_rps_interupts() is brave. Are these
registers move than double-buffered? Should we throw in a '&& loops++ < 3'?
-Chris
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 120b0967c4e8..3b18fdbdea60 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1577,7 +1577,11 @@  struct drm_i915_private {
 	u32 pm_imr;
 	u32 pm_ier;
 	u32 pm_rps_events;
-	u32 pm_guc_events;
+	union {
+		/* RPS and GuC share a register pre-Gen11 */
+		u32 pm_guc_events;
+		u32 guc_events;
+	};
 	u32 pipestat_irq_mask[I915_MAX_PIPES];
 
 	struct {
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 3dd971c09d52..c1b4fbd5f496 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -573,6 +573,44 @@  static void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv)
 	gen9_reset_guc_interrupts(dev_priv);
 }
 
+static void gen11_reset_guc_interrupts(struct drm_i915_private *dev_priv)
+{
+	spin_lock_irq(&dev_priv->irq_lock);
+
+	while (gen11_reset_one_iir(dev_priv, 0, GEN11_GUC))
+		;
+
+	spin_unlock_irq(&dev_priv->irq_lock);
+}
+
+static void gen11_enable_guc_interrupts(struct drm_i915_private *dev_priv)
+{
+	spin_lock_irq(&dev_priv->irq_lock);
+	if (!dev_priv->guc_interrupts.enabled) {
+		u32 guc_events = dev_priv->guc_events << 16;
+
+		WARN_ON_ONCE(gen11_reset_one_iir(dev_priv, 0, GEN11_GUC));
+		I915_WRITE(GEN11_GUC_SG_INTR_ENABLE, guc_events);
+		I915_WRITE(GEN11_GUC_SG_INTR_MASK, ~guc_events);
+		dev_priv->guc_interrupts.enabled = true;
+	}
+	spin_unlock_irq(&dev_priv->irq_lock);
+}
+
+static void gen11_disable_guc_interrupts(struct drm_i915_private *dev_priv)
+{
+	spin_lock_irq(&dev_priv->irq_lock);
+	dev_priv->guc_interrupts.enabled = false;
+
+	I915_WRITE(GEN11_GUC_SG_INTR_MASK, ~0);
+	I915_WRITE(GEN11_GUC_SG_INTR_ENABLE, 0);
+
+	spin_unlock_irq(&dev_priv->irq_lock);
+	synchronize_irq(dev_priv->drm.irq);
+
+	gen11_reset_guc_interrupts(dev_priv);
+}
+
 /**
  * bdw_update_port_irq - update DE port interrupt
  * @dev_priv: driver private
@@ -1823,6 +1861,12 @@  static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 gt_iir)
 		intel_guc_to_host_event_handler(&dev_priv->guc);
 }
 
+static void gen11_guc_irq_handler(struct drm_i915_private *dev_priv, u16 iir)
+{
+	if (iir & GEN11_GUC_INTR_GUC2HOST)
+		intel_guc_to_host_event_handler(&dev_priv->guc);
+}
+
 static void i9xx_pipestat_irq_reset(struct drm_i915_private *dev_priv)
 {
 	enum pipe pipe;
@@ -2945,11 +2989,17 @@  static void
 gen11_other_irq_handler(struct drm_i915_private * const i915,
 			const u8 instance, const u16 iir)
 {
-	if (instance == OTHER_GTPM_INSTANCE)
+	switch (instance) {
+	case OTHER_GUC_INSTANCE:
+		return gen11_guc_irq_handler(i915, iir);
+
+	case OTHER_GTPM_INSTANCE:
 		return gen6_rps_irq_handler(i915, iir);
 
-	WARN_ONCE(1, "unhandled other interrupt instance=0x%x, iir=0x%x\n",
-		  instance, iir);
+	default:
+		WARN_ONCE(1, "unhandled other irq instance=0x%x, iir=0x%x\n",
+			  instance, iir);
+	}
 }
 
 static void
@@ -3469,6 +3519,8 @@  static void gen11_gt_irq_reset(struct drm_i915_private *dev_priv)
 
 	I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
 	I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
+	I915_WRITE(GEN11_GUC_SG_INTR_ENABLE, 0);
+	I915_WRITE(GEN11_GUC_SG_INTR_MASK,  ~0);
 }
 
 static void gen11_irq_reset(struct drm_device *dev)
@@ -4111,6 +4163,10 @@  static void gen11_gt_irq_postinstall(struct drm_i915_private *dev_priv)
 	dev_priv->pm_imr = ~dev_priv->pm_ier;
 	I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
 	I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
+
+	/* Same thing for GuC interrupts */
+	I915_WRITE(GEN11_GUC_SG_INTR_ENABLE, 0);
+	I915_WRITE(GEN11_GUC_SG_INTR_MASK,  ~0);
 }
 
 static void icp_irq_postinstall(struct drm_device *dev)
@@ -4611,8 +4667,12 @@  void intel_irq_init(struct drm_i915_private *dev_priv)
 	for (i = 0; i < MAX_L3_SLICES; ++i)
 		dev_priv->l3_parity.remap_info[i] = NULL;
 
-	if (HAS_GUC_SCHED(dev_priv))
-		dev_priv->pm_guc_events = GEN9_GUC_TO_HOST_INT_EVENT;
+	if (HAS_GUC_SCHED(dev_priv)) {
+		if (INTEL_GEN(dev_priv) < 11)
+			dev_priv->pm_guc_events = GEN9_GUC_TO_HOST_INT_EVENT;
+		else
+			dev_priv->guc_events = GEN11_GUC_INTR_GUC2HOST;
+	}
 
 	/* Let's track the enabled rps events */
 	if (IS_VALLEYVIEW(dev_priv))
@@ -4637,7 +4697,11 @@  void intel_irq_init(struct drm_i915_private *dev_priv)
 	if (INTEL_GEN(dev_priv) >= 8 && INTEL_GEN(dev_priv) < 11)
 		rps->pm_intrmsk_mbz |= GEN8_PMINTR_DISABLE_REDIRECT_TO_GUC;
 
-	if (INTEL_GEN(dev_priv) >= 9) {
+	if (INTEL_GEN(dev_priv) >= 11) {
+		dev_priv->guc_interrupts.reset = gen11_reset_guc_interrupts;
+		dev_priv->guc_interrupts.enable = gen11_enable_guc_interrupts;
+		dev_priv->guc_interrupts.disable = gen11_disable_guc_interrupts;
+	} else if (INTEL_GEN(dev_priv) >= 9) {
 		dev_priv->guc_interrupts.reset = gen9_reset_guc_interrupts;
 		dev_priv->guc_interrupts.enable = gen9_enable_guc_interrupts;
 		dev_priv->guc_interrupts.disable = gen9_disable_guc_interrupts;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 8aee35ced574..d80661941723 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -290,6 +290,7 @@  static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define OTHER_CLASS		4
 #define MAX_ENGINE_CLASS	4
 
+#define OTHER_GUC_INSTANCE	0
 #define OTHER_GTPM_INSTANCE	1
 #define MAX_ENGINE_INSTANCE    3
 
diff --git a/drivers/gpu/drm/i915/intel_guc_reg.h b/drivers/gpu/drm/i915/intel_guc_reg.h
index 7eba65795b58..a214f8b71929 100644
--- a/drivers/gpu/drm/i915/intel_guc_reg.h
+++ b/drivers/gpu/drm/i915/intel_guc_reg.h
@@ -134,4 +134,22 @@  struct guc_doorbell_info {
 #define GUC_WD_VECS_IER			_MMIO(0xC558)
 #define GUC_PM_P24C_IER			_MMIO(0xC55C)
 
+/* GuC Interrupt Vector */
+#define GEN11_GUC_INTR_GUC2HOST		(1 << 15)
+#define GEN11_GUC_INTR_EXEC_ERROR	(1 << 14)
+#define GEN11_GUC_INTR_DISPLAY_EVENT	(1 << 13)
+#define GEN11_GUC_INTR_SEM_SIG		(1 << 12)
+#define GEN11_GUC_INTR_IOMMU2GUC	(1 << 11)
+#define GEN11_GUC_INTR_DOORBELL_RANG	(1 << 10)
+#define GEN11_GUC_INTR_DMA_DONE		(1 <<  9)
+#define GEN11_GUC_INTR_FATAL_ERROR	(1 <<  8)
+#define GEN11_GUC_INTR_NOTIF_ERROR	(1 <<  7)
+#define GEN11_GUC_INTR_SW_INT_6		(1 <<  6)
+#define GEN11_GUC_INTR_SW_INT_5		(1 <<  5)
+#define GEN11_GUC_INTR_SW_INT_4		(1 <<  4)
+#define GEN11_GUC_INTR_SW_INT_3		(1 <<  3)
+#define GEN11_GUC_INTR_SW_INT_2		(1 <<  2)
+#define GEN11_GUC_INTR_SW_INT_1		(1 <<  1)
+#define GEN11_GUC_INTR_SW_INT_0		(1 <<  0)
+
 #endif