drm/i915/guc: unify guc irq handling

The 16-bit guc irq vector is unchanged across gens, the only thing that
moved is its position (from the upper 16 bits of the PM regs to its own
register). Instead of duplicating all defines and functions to handle
the 2 different positions, we can work on the vector and shift it as
appropriate. While at it, update the handler to work on intel_guc.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190713100016.8026-5-chris@chris-wilson.co.ukSigned-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_irq.c

@@ -264,7 +264,7 @@ static void gen2_irq_init(struct intel_uncore *uncore,
 	gen2_irq_init((uncore), imr_val, ier_val)
 
 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
-static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
+static void guc_irq_handler(struct intel_guc *guc, u16 guc_iir);
 
 /* For display hotplug interrupt */
 static inline void
@@ -658,8 +658,7 @@ void gen11_enable_guc_interrupts(struct intel_guc *guc)
 
 	spin_lock_irq(&dev_priv->irq_lock);
 	if (!guc->interrupts.enabled) {
-		u32 events = REG_FIELD_PREP(ENGINE1_MASK,
-					    GEN11_GUC_INTR_GUC2HOST);
+		u32 events = REG_FIELD_PREP(ENGINE1_MASK, GUC_INTR_GUC2HOST);
 
 		WARN_ON_ONCE(gen11_reset_one_iir(&dev_priv->gt, 0, GEN11_GUC));
 		I915_WRITE(GEN11_GUC_SG_INTR_ENABLE, events);
@@ -1656,7 +1655,7 @@ static void gen8_gt_irq_handler(struct drm_i915_private *i915,
 
 	if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
 		gen6_rps_irq_handler(i915, gt_iir[2]);
-		gen9_guc_irq_handler(i915, gt_iir[2]);
+		guc_irq_handler(&i915->guc, gt_iir[2] >> 16);
 	}
 }
 
@@ -1955,16 +1954,10 @@ static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
 		DRM_DEBUG("Command parser error, pm_iir 0x%08x\n", pm_iir);
 }
 
-static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 gt_iir)
+static void guc_irq_handler(struct intel_guc *guc, u16 iir)
 {
-	if (gt_iir & GEN9_GUC_TO_HOST_INT_EVENT)
-		intel_guc_to_host_event_handler(&dev_priv->guc);
-}
-
-static void gen11_guc_irq_handler(struct drm_i915_private *i915, u16 iir)
-{
-	if (iir & GEN11_GUC_INTR_GUC2HOST)
-		intel_guc_to_host_event_handler(&i915->guc);
+	if (iir & GUC_INTR_GUC2HOST)
+		intel_guc_to_host_event_handler(guc);
 }
 
 static void i9xx_pipestat_irq_reset(struct drm_i915_private *dev_priv)
@@ -3092,7 +3085,7 @@ gen11_other_irq_handler(struct intel_gt *gt, const u8 instance,
 	struct drm_i915_private *i915 = gt->i915;
 
 	if (instance == OTHER_GUC_INSTANCE)
-		return gen11_guc_irq_handler(i915, iir);
+		return guc_irq_handler(&i915->guc, iir);
 
 	if (instance == OTHER_GTPM_INSTANCE)
 		return gen11_rps_irq_handler(gt, iir);
@@ -4764,8 +4757,9 @@ 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;
 
+	/* pre-gen11 the guc irqs bits are in the upper 16 bits of the pm reg */
 	if (HAS_GUC_SCHED(dev_priv) && INTEL_GEN(dev_priv) < 11)
-		dev_priv->pm_guc_events = GEN9_GUC_TO_HOST_INT_EVENT;
+		dev_priv->pm_guc_events = GUC_INTR_GUC2HOST << 16;
 
 	/* Let's track the enabled rps events */
 	if (IS_VALLEYVIEW(dev_priv))

drivers/gpu/drm/i915/i915_reg.h

@@ -7357,16 +7357,6 @@ enum {
 #define GEN8_GT_IIR(which) _MMIO(0x44308 + (0x10 * (which)))
 #define GEN8_GT_IER(which) _MMIO(0x4430c + (0x10 * (which)))
 
-#define GEN9_GUC_TO_HOST_INT_EVENT	(1 << 31)
-#define GEN9_GUC_EXEC_ERROR_EVENT	(1 << 30)
-#define GEN9_GUC_DISPLAY_EVENT		(1 << 29)
-#define GEN9_GUC_SEMA_SIGNAL_EVENT	(1 << 28)
-#define GEN9_GUC_IOMMU_MSG_EVENT	(1 << 27)
-#define GEN9_GUC_DB_RING_EVENT		(1 << 26)
-#define GEN9_GUC_DMA_DONE_EVENT		(1 << 25)
-#define GEN9_GUC_FATAL_ERROR_EVENT	(1 << 24)
-#define GEN9_GUC_NOTIFICATION_EVENT	(1 << 23)
-
 #define GEN8_RCS_IRQ_SHIFT 0
 #define GEN8_BCS_IRQ_SHIFT 16
 #define GEN8_VCS0_IRQ_SHIFT 0  /* NB: VCS1 in bspec! */

drivers/gpu/drm/i915/intel_guc_reg.h

@@ -141,21 +141,21 @@ struct guc_doorbell_info {
 #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)
+#define GUC_INTR_GUC2HOST		BIT(15)
+#define GUC_INTR_EXEC_ERROR		BIT(14)
+#define GUC_INTR_DISPLAY_EVENT		BIT(13)
+#define GUC_INTR_SEM_SIG		BIT(12)
+#define GUC_INTR_IOMMU2GUC		BIT(11)
+#define GUC_INTR_DOORBELL_RANG		BIT(10)
+#define GUC_INTR_DMA_DONE		BIT(9)
+#define GUC_INTR_FATAL_ERROR		BIT(8)
+#define GUC_INTR_NOTIF_ERROR		BIT(7)
+#define GUC_INTR_SW_INT_6		BIT(6)
+#define GUC_INTR_SW_INT_5		BIT(5)
+#define GUC_INTR_SW_INT_4		BIT(4)
+#define GUC_INTR_SW_INT_3		BIT(3)
+#define GUC_INTR_SW_INT_2		BIT(2)
+#define GUC_INTR_SW_INT_1		BIT(1)
+#define GUC_INTR_SW_INT_0		BIT(0)
 
 #endif