drm/i915: Extract general GT interrupt handlers

i915_irq.c is large. It serves as the central dispatch and handler for
all of our device interrupts. Lets break it up by pulling out the GT
interrupt handlers.

Based on a patch by Chris Wilson.

Signed-off-by: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190811210633.18417-1-chris@chris-wilson.co.uk

10 files changed, 593 insertions, 551 deletions

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 89f1a1997ff5..02cede79e552 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -80,6 +80,7 @@ gt-y += \
 	gt/intel_engine_pm.o \
 	gt/intel_engine_user.o \
 	gt/intel_gt.o \
+	gt/intel_gt_irq.o \
 	gt/intel_gt_pm.o \
 	gt/intel_gt_pm_irq.o \
 	gt/intel_hangcheck.o \
diff --git a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
index e1bbc9b428cd..ceba1da61967 100644
--- a/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
@@ -35,9 +35,9 @@ static void irq_enable(struct intel_engine_cs *engine)
 		return;
 
 	/* Caller disables interrupts */
-	spin_lock(&engine->i915->irq_lock);
+	spin_lock(&engine->gt->irq_lock);
 	engine->irq_enable(engine);
-	spin_unlock(&engine->i915->irq_lock);
+	spin_unlock(&engine->gt->irq_lock);
 }
 
 static void irq_disable(struct intel_engine_cs *engine)
@@ -46,9 +46,9 @@ static void irq_disable(struct intel_engine_cs *engine)
 		return;
 
 	/* Caller disables interrupts */
-	spin_lock(&engine->i915->irq_lock);
+	spin_lock(&engine->gt->irq_lock);
 	engine->irq_disable(engine);
-	spin_unlock(&engine->i915->irq_lock);
+	spin_unlock(&engine->gt->irq_lock);
 }
 
 static void __intel_breadcrumbs_disarm_irq(struct intel_breadcrumbs *b)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
new file mode 100644
index 000000000000..34a4fb624bf7
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
@@ -0,0 +1,455 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <linux/sched/clock.h>
+
+#include "i915_drv.h"
+#include "i915_irq.h"
+#include "intel_gt.h"
+#include "intel_gt_irq.h"
+#include "intel_uncore.h"
+
+static void guc_irq_handler(struct intel_guc *guc, u16 iir)
+{
+	if (iir & GUC_INTR_GUC2HOST)
+		intel_guc_to_host_event_handler(guc);
+}
+
+static void
+cs_irq_handler(struct intel_engine_cs *engine, u32 iir)
+{
+	bool tasklet = false;
+
+	if (iir & GT_CONTEXT_SWITCH_INTERRUPT)
+		tasklet = true;
+
+	if (iir & GT_RENDER_USER_INTERRUPT) {
+		intel_engine_breadcrumbs_irq(engine);
+		tasklet |= intel_engine_needs_breadcrumb_tasklet(engine);
+	}
+
+	if (tasklet)
+		tasklet_hi_schedule(&engine->execlists.tasklet);
+}
+
+static u32
+gen11_gt_engine_identity(struct intel_gt *gt,
+			 const unsigned int bank, const unsigned int bit)
+{
+	void __iomem * const regs = gt->uncore->regs;
+	u32 timeout_ts;
+	u32 ident;
+
+	lockdep_assert_held(&gt->irq_lock);
+
+	raw_reg_write(regs, GEN11_IIR_REG_SELECTOR(bank), BIT(bit));
+
+	/*
+	 * NB: Specs do not specify how long to spin wait,
+	 * so we do ~100us as an educated guess.
+	 */
+	timeout_ts = (local_clock() >> 10) + 100;
+	do {
+		ident = raw_reg_read(regs, GEN11_INTR_IDENTITY_REG(bank));
+	} while (!(ident & GEN11_INTR_DATA_VALID) &&
+		 !time_after32(local_clock() >> 10, timeout_ts));
+
+	if (unlikely(!(ident & GEN11_INTR_DATA_VALID))) {
+		DRM_ERROR("INTR_IDENTITY_REG%u:%u 0x%08x not valid!\n",
+			  bank, bit, ident);
+		return 0;
+	}
+
+	raw_reg_write(regs, GEN11_INTR_IDENTITY_REG(bank),
+		      GEN11_INTR_DATA_VALID);
+
+	return ident;
+}
+
+static void
+gen11_other_irq_handler(struct intel_gt *gt, const u8 instance,
+			const u16 iir)
+{
+	if (instance == OTHER_GUC_INSTANCE)
+		return guc_irq_handler(&gt->uc.guc, iir);
+
+	if (instance == OTHER_GTPM_INSTANCE)
+		return gen11_rps_irq_handler(gt, iir);
+
+	WARN_ONCE(1, "unhandled other interrupt instance=0x%x, iir=0x%x\n",
+		  instance, iir);
+}
+
+static void
+gen11_engine_irq_handler(struct intel_gt *gt, const u8 class,
+			 const u8 instance, const u16 iir)
+{
+	struct intel_engine_cs *engine;
+
+	if (instance <= MAX_ENGINE_INSTANCE)
+		engine = gt->engine_class[class][instance];
+	else
+		engine = NULL;
+
+	if (likely(engine))
+		return cs_irq_handler(engine, iir);
+
+	WARN_ONCE(1, "unhandled engine interrupt class=0x%x, instance=0x%x\n",
+		  class, instance);
+}
+
+static void
+gen11_gt_identity_handler(struct intel_gt *gt, const u32 identity)
+{
+	const u8 class = GEN11_INTR_ENGINE_CLASS(identity);
+	const u8 instance = GEN11_INTR_ENGINE_INSTANCE(identity);
+	const u16 intr = GEN11_INTR_ENGINE_INTR(identity);
+
+	if (unlikely(!intr))
+		return;
+
+	if (class <= COPY_ENGINE_CLASS)
+		return gen11_engine_irq_handler(gt, class, instance, intr);
+
+	if (class == OTHER_CLASS)
+		return gen11_other_irq_handler(gt, instance, intr);
+
+	WARN_ONCE(1, "unknown interrupt class=0x%x, instance=0x%x, intr=0x%x\n",
+		  class, instance, intr);
+}
+
+static void
+gen11_gt_bank_handler(struct intel_gt *gt, const unsigned int bank)
+{
+	void __iomem * const regs = gt->uncore->regs;
+	unsigned long intr_dw;
+	unsigned int bit;
+
+	lockdep_assert_held(&gt->irq_lock);
+
+	intr_dw = raw_reg_read(regs, GEN11_GT_INTR_DW(bank));
+
+	for_each_set_bit(bit, &intr_dw, 32) {
+		const u32 ident = gen11_gt_engine_identity(gt, bank, bit);
+
+		gen11_gt_identity_handler(gt, ident);
+	}
+
+	/* Clear must be after shared has been served for engine */
+	raw_reg_write(regs, GEN11_GT_INTR_DW(bank), intr_dw);
+}
+
+void gen11_gt_irq_handler(struct intel_gt *gt, const u32 master_ctl)
+{
+	unsigned int bank;
+
+	spin_lock(&gt->irq_lock);
+
+	for (bank = 0; bank < 2; bank++) {
+		if (master_ctl & GEN11_GT_DW_IRQ(bank))
+			gen11_gt_bank_handler(gt, bank);
+	}
+
+	spin_unlock(&gt->irq_lock);
+}
+
+bool gen11_gt_reset_one_iir(struct intel_gt *gt,
+			    const unsigned int bank, const unsigned int bit)
+{
+	void __iomem * const regs = gt->uncore->regs;
+	u32 dw;
+
+	lockdep_assert_held(&gt->irq_lock);
+
+	dw = raw_reg_read(regs, GEN11_GT_INTR_DW(bank));
+	if (dw & BIT(bit)) {
+		/*
+		 * According to the BSpec, DW_IIR bits cannot be cleared without
+		 * first servicing the Selector & Shared IIR registers.
+		 */
+		gen11_gt_engine_identity(gt, bank, bit);
+
+		/*
+		 * We locked GT INT DW by reading it. If we want to (try
+		 * to) recover from this successfully, we need to clear
+		 * our bit, otherwise we are locking the register for
+		 * everybody.
+		 */
+		raw_reg_write(regs, GEN11_GT_INTR_DW(bank), BIT(bit));
+
+		return true;
+	}
+
+	return false;
+}
+
+void gen11_gt_irq_reset(struct intel_gt *gt)
+{
+	struct intel_uncore *uncore = gt->uncore;
+
+	/* Disable RCS, BCS, VCS and VECS class engines. */
+	intel_uncore_write(uncore, GEN11_RENDER_COPY_INTR_ENABLE, 0);
+	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE,	  0);
+
+	/* Restore masks irqs on RCS, BCS, VCS and VECS engines. */
+	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK,	~0);
+	intel_uncore_write(uncore, GEN11_BCS_RSVD_INTR_MASK,	~0);
+	intel_uncore_write(uncore, GEN11_VCS0_VCS1_INTR_MASK,	~0);
+	intel_uncore_write(uncore, GEN11_VCS2_VCS3_INTR_MASK,	~0);
+	intel_uncore_write(uncore, GEN11_VECS0_VECS1_INTR_MASK,	~0);
+
+	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
+	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
+	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_ENABLE, 0);
+	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_MASK,  ~0);
+}
+
+void gen11_gt_irq_postinstall(struct intel_gt *gt)
+{
+	const u32 irqs = GT_RENDER_USER_INTERRUPT | GT_CONTEXT_SWITCH_INTERRUPT;
+	struct intel_uncore *uncore = gt->uncore;
+	const u32 dmask = irqs << 16 | irqs;
+	const u32 smask = irqs << 16;
+
+	BUILD_BUG_ON(irqs & 0xffff0000);
+
+	/* Enable RCS, BCS, VCS and VECS class interrupts. */
+	intel_uncore_write(uncore, GEN11_RENDER_COPY_INTR_ENABLE, dmask);
+	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE, dmask);
+
+	/* Unmask irqs on RCS, BCS, VCS and VECS engines. */
+	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK, ~smask);
+	intel_uncore_write(uncore, GEN11_BCS_RSVD_INTR_MASK, ~smask);
+	intel_uncore_write(uncore, GEN11_VCS0_VCS1_INTR_MASK, ~dmask);
+	intel_uncore_write(uncore, GEN11_VCS2_VCS3_INTR_MASK, ~dmask);
+	intel_uncore_write(uncore, GEN11_VECS0_VECS1_INTR_MASK, ~dmask);
+
+	/*
+	 * RPS interrupts will get enabled/disabled on demand when RPS itself
+	 * is enabled/disabled.
+	 */
+	gt->pm_ier = 0x0;
+	gt->pm_imr = ~gt->pm_ier;
+	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
+	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
+
+	/* Same thing for GuC interrupts */
+	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_ENABLE, 0);
+	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_MASK,  ~0);
+}
+
+void gen5_gt_irq_handler(struct intel_gt *gt, u32 gt_iir)
+{
+	if (gt_iir & GT_RENDER_USER_INTERRUPT)
+		intel_engine_breadcrumbs_irq(gt->engine_class[RENDER_CLASS][0]);
+	if (gt_iir & ILK_BSD_USER_INTERRUPT)
+		intel_engine_breadcrumbs_irq(gt->engine_class[VIDEO_DECODE_CLASS][0]);
+}
+
+static void gen7_parity_error_irq_handler(struct intel_gt *gt, u32 iir)
+{
+	if (!HAS_L3_DPF(gt->i915))
+		return;
+
+	spin_lock(&gt->irq_lock);
+	gen5_gt_disable_irq(gt, GT_PARITY_ERROR(gt->i915));
+	spin_unlock(&gt->irq_lock);
+
+	if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
+		gt->i915->l3_parity.which_slice |= 1 << 1;
+
+	if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
+		gt->i915->l3_parity.which_slice |= 1 << 0;
+
+	schedule_work(&gt->i915->l3_parity.error_work);
+}
+
+void gen6_gt_irq_handler(struct intel_gt *gt, u32 gt_iir)
+{
+	if (gt_iir & GT_RENDER_USER_INTERRUPT)
+		intel_engine_breadcrumbs_irq(gt->engine_class[RENDER_CLASS][0]);
+	if (gt_iir & GT_BSD_USER_INTERRUPT)
+		intel_engine_breadcrumbs_irq(gt->engine_class[VIDEO_DECODE_CLASS][0]);
+	if (gt_iir & GT_BLT_USER_INTERRUPT)
+		intel_engine_breadcrumbs_irq(gt->engine_class[COPY_ENGINE_CLASS][0]);
+
+	if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
+		      GT_BSD_CS_ERROR_INTERRUPT |
+		      GT_RENDER_CS_MASTER_ERROR_INTERRUPT))
+		DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir);
+
+	if (gt_iir & GT_PARITY_ERROR(gt->i915))
+		gen7_parity_error_irq_handler(gt, gt_iir);
+}
+
+void gen8_gt_irq_ack(struct intel_gt *gt, u32 master_ctl, u32 gt_iir[4])
+{
+	void __iomem * const regs = gt->uncore->regs;
+
+	if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
+		gt_iir[0] = raw_reg_read(regs, GEN8_GT_IIR(0));
+		if (likely(gt_iir[0]))
+			raw_reg_write(regs, GEN8_GT_IIR(0), gt_iir[0]);
+	}
+
+	if (master_ctl & (GEN8_GT_VCS0_IRQ | GEN8_GT_VCS1_IRQ)) {
+		gt_iir[1] = raw_reg_read(regs, GEN8_GT_IIR(1));
+		if (likely(gt_iir[1]))
+			raw_reg_write(regs, GEN8_GT_IIR(1), gt_iir[1]);
+	}
+
+	if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
+		gt_iir[2] = raw_reg_read(regs, GEN8_GT_IIR(2));
+		if (likely(gt_iir[2]))
+			raw_reg_write(regs, GEN8_GT_IIR(2), gt_iir[2]);
+	}
+
+	if (master_ctl & GEN8_GT_VECS_IRQ) {
+		gt_iir[3] = raw_reg_read(regs, GEN8_GT_IIR(3));
+		if (likely(gt_iir[3]))
+			raw_reg_write(regs, GEN8_GT_IIR(3), gt_iir[3]);
+	}
+}
+
+void gen8_gt_irq_handler(struct intel_gt *gt, u32 master_ctl, u32 gt_iir[4])
+{
+	if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
+		cs_irq_handler(gt->engine_class[RENDER_CLASS][0],
+			       gt_iir[0] >> GEN8_RCS_IRQ_SHIFT);
+		cs_irq_handler(gt->engine_class[COPY_ENGINE_CLASS][0],
+			       gt_iir[0] >> GEN8_BCS_IRQ_SHIFT);
+	}
+
+	if (master_ctl & (GEN8_GT_VCS0_IRQ | GEN8_GT_VCS1_IRQ)) {
+		cs_irq_handler(gt->engine_class[VIDEO_DECODE_CLASS][0],
+			       gt_iir[1] >> GEN8_VCS0_IRQ_SHIFT);
+		cs_irq_handler(gt->engine_class[VIDEO_DECODE_CLASS][1],
+			       gt_iir[1] >> GEN8_VCS1_IRQ_SHIFT);
+	}
+
+	if (master_ctl & GEN8_GT_VECS_IRQ) {
+		cs_irq_handler(gt->engine_class[VIDEO_ENHANCEMENT_CLASS][0],
+			       gt_iir[3] >> GEN8_VECS_IRQ_SHIFT);
+	}
+
+	if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
+		gen6_rps_irq_handler(gt->i915, gt_iir[2]);
+		guc_irq_handler(&gt->uc.guc, gt_iir[2] >> 16);
+	}
+}
+
+void gen8_gt_irq_reset(struct intel_gt *gt)
+{
+	struct intel_uncore *uncore = gt->uncore;
+
+	GEN8_IRQ_RESET_NDX(uncore, GT, 0);
+	GEN8_IRQ_RESET_NDX(uncore, GT, 1);
+	GEN8_IRQ_RESET_NDX(uncore, GT, 2);
+	GEN8_IRQ_RESET_NDX(uncore, GT, 3);
+}
+
+void gen8_gt_irq_postinstall(struct intel_gt *gt)
+{
+	struct intel_uncore *uncore = gt->uncore;
+
+	/* These are interrupts we'll toggle with the ring mask register */
+	u32 gt_interrupts[] = {
+		(GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
+		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
+		 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT |
+		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT),
+
+		(GT_RENDER_USER_INTERRUPT << GEN8_VCS0_IRQ_SHIFT |
+		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS0_IRQ_SHIFT |
+		 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
+		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT),
+
+		0,
+
+		(GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
+		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT)
+	};
+
+	gt->pm_ier = 0x0;
+	gt->pm_imr = ~gt->pm_ier;
+	GEN8_IRQ_INIT_NDX(uncore, GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
+	GEN8_IRQ_INIT_NDX(uncore, GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
+	/*
+	 * RPS interrupts will get enabled/disabled on demand when RPS itself
+	 * is enabled/disabled. Same wil be the case for GuC interrupts.
+	 */
+	GEN8_IRQ_INIT_NDX(uncore, GT, 2, gt->pm_imr, gt->pm_ier);
+	GEN8_IRQ_INIT_NDX(uncore, GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
+}
+
+static void gen5_gt_update_irq(struct intel_gt *gt,
+			       u32 interrupt_mask,
+			       u32 enabled_irq_mask)
+{
+	lockdep_assert_held(&gt->irq_lock);
+
+	GEM_BUG_ON(enabled_irq_mask & ~interrupt_mask);
+
+	gt->gt_imr &= ~interrupt_mask;
+	gt->gt_imr |= (~enabled_irq_mask & interrupt_mask);
+	intel_uncore_write(gt->uncore, GTIMR, gt->gt_imr);
+}
+
+void gen5_gt_enable_irq(struct intel_gt *gt, u32 mask)
+{
+	gen5_gt_update_irq(gt, mask, mask);
+	intel_uncore_posting_read_fw(gt->uncore, GTIMR);
+}
+
+void gen5_gt_disable_irq(struct intel_gt *gt, u32 mask)
+{
+	gen5_gt_update_irq(gt, mask, 0);
+}
+
+void gen5_gt_irq_reset(struct intel_gt *gt)
+{
+	struct intel_uncore *uncore = gt->uncore;
+
+	GEN3_IRQ_RESET(uncore, GT);
+	if (INTEL_GEN(gt->i915) >= 6)
+		GEN3_IRQ_RESET(uncore, GEN6_PM);
+}
+
+void gen5_gt_irq_postinstall(struct intel_gt *gt)
+{
+	struct intel_uncore *uncore = gt->uncore;
+	u32 pm_irqs = 0;
+	u32 gt_irqs = 0;
+
+	gt->gt_imr = ~0;
+	if (HAS_L3_DPF(gt->i915)) {
+		/* L3 parity interrupt is always unmasked. */
+		gt->gt_imr = ~GT_PARITY_ERROR(gt->i915);
+		gt_irqs |= GT_PARITY_ERROR(gt->i915);
+	}
+
+	gt_irqs |= GT_RENDER_USER_INTERRUPT;
+	if (IS_GEN(gt->i915, 5))
+		gt_irqs |= ILK_BSD_USER_INTERRUPT;
+	else
+		gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
+
+	GEN3_IRQ_INIT(uncore, GT, gt->gt_imr, gt_irqs);
+
+	if (INTEL_GEN(gt->i915) >= 6) {
+		/*
+		 * RPS interrupts will get enabled/disabled on demand when RPS
+		 * itself is enabled/disabled.
+		 */
+		if (HAS_ENGINE(gt->i915, VECS0)) {
+			pm_irqs |= PM_VEBOX_USER_INTERRUPT;
+			gt->pm_ier |= PM_VEBOX_USER_INTERRUPT;
+		}
+
+		gt->pm_imr = 0xffffffff;
+		GEN3_IRQ_INIT(uncore, GEN6_PM, gt->pm_imr, pm_irqs);
+	}
+}
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.h b/drivers/gpu/drm/i915/gt/intel_gt_irq.h
new file mode 100644
index 000000000000..8f37593712c9
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.h
@@ -0,0 +1,44 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef INTEL_GT_IRQ_H
+#define INTEL_GT_IRQ_H
+
+#include <linux/types.h>
+
+struct intel_gt;
+
+#define GEN8_GT_IRQS (GEN8_GT_RCS_IRQ | \
+		      GEN8_GT_BCS_IRQ | \
+		      GEN8_GT_VCS0_IRQ | \
+		      GEN8_GT_VCS1_IRQ | \
+		      GEN8_GT_VECS_IRQ | \
+		      GEN8_GT_PM_IRQ | \
+		      GEN8_GT_GUC_IRQ)
+
+void gen11_gt_irq_reset(struct intel_gt *gt);
+void gen11_gt_irq_postinstall(struct intel_gt *gt);
+void gen11_gt_irq_handler(struct intel_gt *gt, const u32 master_ctl);
+
+bool gen11_gt_reset_one_iir(struct intel_gt *gt,
+			    const unsigned int bank,
+			    const unsigned int bit);
+
+void gen5_gt_irq_handler(struct intel_gt *gt, u32 gt_iir);
+
+void gen5_gt_irq_postinstall(struct intel_gt *gt);
+void gen5_gt_irq_reset(struct intel_gt *gt);
+void gen5_gt_disable_irq(struct intel_gt *gt, u32 mask);
+void gen5_gt_enable_irq(struct intel_gt *gt, u32 mask);
+
+void gen6_gt_irq_handler(struct intel_gt *gt, u32 gt_iir);
+
+void gen8_gt_irq_ack(struct intel_gt *gt, u32 master_ctl, u32 gt_iir[4]);
+void gen8_gt_irq_reset(struct intel_gt *gt);
+void gen8_gt_irq_handler(struct intel_gt *gt, u32 master_ctl, u32 gt_iir[4]);
+void gen8_gt_irq_postinstall(struct intel_gt *gt);
+
+#endif /* INTEL_GT_IRQ_H */
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_pm_irq.c
index 83e11c2cc5ab..babe866126d7 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_pm_irq.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_pm_irq.c
@@ -7,6 +7,7 @@
 #include "i915_drv.h"
 #include "i915_reg.h"
 #include "intel_gt.h"
+#include "intel_gt_irq.h"
 #include "intel_gt_pm_irq.h"
 
 static void write_pm_imr(struct intel_gt *gt)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
index bb752364d447..adab4d2c29ac 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
@@ -74,6 +74,7 @@ struct intel_gt {
 	struct i915_vma *scratch;
 
 	spinlock_t irq_lock;
+	u32 gt_imr;
 	u32 pm_ier;
 	u32 pm_imr;
 
diff --git a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
index 15b0246422c7..409d764f8c6d 100644
--- a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
@@ -37,6 +37,7 @@
 #include "i915_trace.h"
 #include "intel_context.h"
 #include "intel_gt.h"
+#include "intel_gt_irq.h"
 #include "intel_gt_pm_irq.h"
 #include "intel_reset.h"
 #include "intel_workarounds.h"
@@ -983,13 +984,13 @@ static u32 *gen5_emit_breadcrumb(struct i915_request *rq, u32 *cs)
 static void
 gen5_irq_enable(struct intel_engine_cs *engine)
 {
-	gen5_enable_gt_irq(engine->i915, engine->irq_enable_mask);
+	gen5_gt_enable_irq(engine->gt, engine->irq_enable_mask);
 }
 
 static void
 gen5_irq_disable(struct intel_engine_cs *engine)
 {
-	gen5_disable_gt_irq(engine->i915, engine->irq_enable_mask);
+	gen5_gt_disable_irq(engine->gt, engine->irq_enable_mask);
 }
 
 static void
@@ -1050,14 +1051,14 @@ gen6_irq_enable(struct intel_engine_cs *engine)
 	/* Flush/delay to ensure the RING_IMR is active before the GT IMR */
 	ENGINE_POSTING_READ(engine, RING_IMR);
 
-	gen5_enable_gt_irq(engine->i915, engine->irq_enable_mask);
+	gen5_gt_enable_irq(engine->gt, engine->irq_enable_mask);
 }
 
 static void
 gen6_irq_disable(struct intel_engine_cs *engine)
 {
 	ENGINE_WRITE(engine, RING_IMR, ~engine->irq_keep_mask);
-	gen5_disable_gt_irq(engine->i915, engine->irq_enable_mask);
+	gen5_gt_disable_irq(engine->gt, engine->irq_enable_mask);
 }
 
 static void
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4397c6f4bb12..d6a35f8c7dd9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1427,7 +1427,6 @@ struct drm_i915_private {
 		u32 irq_mask;
 		u32 de_irq_mask[I915_MAX_PIPES];
 	};
-	u32 gt_irq_mask;
 	u32 pm_rps_events;
 	u32 pipestat_irq_mask[I915_MAX_PIPES];
 
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 538976174ad7..73efb373dfa2 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -44,6 +44,7 @@
 #include "display/intel_psr.h"
 
 #include "gt/intel_gt.h"
+#include "gt/intel_gt_irq.h"
 #include "gt/intel_gt_pm_irq.h"
 
 #include "i915_drv.h"
@@ -174,8 +175,8 @@ static const u32 hpd_tgp[HPD_NUM_PINS] = {
 	[HPD_PORT_I] = SDE_TC6_HOTPLUG_TGP,
 };
 
-static void gen3_irq_reset(struct intel_uncore *uncore, i915_reg_t imr,
-			   i915_reg_t iir, i915_reg_t ier)
+void gen3_irq_reset(struct intel_uncore *uncore, i915_reg_t imr,
+		    i915_reg_t iir, i915_reg_t ier)
 {
 	intel_uncore_write(uncore, imr, 0xffffffff);
 	intel_uncore_posting_read(uncore, imr);
@@ -189,7 +190,7 @@ static void gen3_irq_reset(struct intel_uncore *uncore, i915_reg_t imr,
 	intel_uncore_posting_read(uncore, iir);
 }
 
-static void gen2_irq_reset(struct intel_uncore *uncore)
+void gen2_irq_reset(struct intel_uncore *uncore)
 {
 	intel_uncore_write16(uncore, GEN2_IMR, 0xffff);
 	intel_uncore_posting_read16(uncore, GEN2_IMR);
@@ -203,19 +204,6 @@ static void gen2_irq_reset(struct intel_uncore *uncore)
 	intel_uncore_posting_read16(uncore, GEN2_IIR);
 }
 
-#define GEN8_IRQ_RESET_NDX(uncore, type, which) \
-({ \
-	unsigned int which_ = which; \
-	gen3_irq_reset((uncore), GEN8_##type##_IMR(which_), \
-		       GEN8_##type##_IIR(which_), GEN8_##type##_IER(which_)); \
-})
-
-#define GEN3_IRQ_RESET(uncore, type) \
-	gen3_irq_reset((uncore), type##IMR, type##IIR, type##IER)
-
-#define GEN2_IRQ_RESET(uncore) \
-	gen2_irq_reset(uncore)
-
 /*
  * We should clear IMR at preinstall/uninstall, and just check at postinstall.
  */
@@ -249,10 +237,10 @@ static void gen2_assert_iir_is_zero(struct intel_uncore *uncore)
 	intel_uncore_posting_read16(uncore, GEN2_IIR);
 }
 
-static void gen3_irq_init(struct intel_uncore *uncore,
-			  i915_reg_t imr, u32 imr_val,
-			  i915_reg_t ier, u32 ier_val,
-			  i915_reg_t iir)
+void gen3_irq_init(struct intel_uncore *uncore,
+		   i915_reg_t imr, u32 imr_val,
+		   i915_reg_t ier, u32 ier_val,
+		   i915_reg_t iir)
 {
 	gen3_assert_iir_is_zero(uncore, iir);
 
@@ -261,8 +249,8 @@ static void gen3_irq_init(struct intel_uncore *uncore,
 	intel_uncore_posting_read(uncore, imr);
 }
 
-static void gen2_irq_init(struct intel_uncore *uncore,
-			  u32 imr_val, u32 ier_val)
+void gen2_irq_init(struct intel_uncore *uncore,
+		   u32 imr_val, u32 ier_val)
 {
 	gen2_assert_iir_is_zero(uncore);
 
@@ -271,27 +259,6 @@ static void gen2_irq_init(struct intel_uncore *uncore,
 	intel_uncore_posting_read16(uncore, GEN2_IMR);
 }
 
-#define GEN8_IRQ_INIT_NDX(uncore, type, which, imr_val, ier_val) \
-({ \
-	unsigned int which_ = which; \
-	gen3_irq_init((uncore), \
-		      GEN8_##type##_IMR(which_), imr_val, \
-		      GEN8_##type##_IER(which_), ier_val, \
-		      GEN8_##type##_IIR(which_)); \
-})
-
-#define GEN3_IRQ_INIT(uncore, type, imr_val, ier_val) \
-	gen3_irq_init((uncore), \
-		      type##IMR, imr_val, \
-		      type##IER, ier_val, \
-		      type##IIR)
-
-#define GEN2_IRQ_INIT(uncore, imr_val, ier_val) \
-	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 guc_irq_handler(struct intel_guc *guc, u16 guc_iir);
-
 /* For display hotplug interrupt */
 static inline void
 i915_hotplug_interrupt_update_locked(struct drm_i915_private *dev_priv,
@@ -330,41 +297,6 @@ void i915_hotplug_interrupt_update(struct drm_i915_private *dev_priv,
 	spin_unlock_irq(&dev_priv->irq_lock);
 }
 
-static u32
-gen11_gt_engine_identity(struct intel_gt *gt,
-			 const unsigned int bank, const unsigned int bit);
-
-static bool gen11_reset_one_iir(struct intel_gt *gt,
-				const unsigned int bank,
-				const unsigned int bit)
-{
-	void __iomem * const regs = gt->uncore->regs;
-	u32 dw;
-
-	lockdep_assert_held(&gt->i915->irq_lock);
-
-	dw = raw_reg_read(regs, GEN11_GT_INTR_DW(bank));
-	if (dw & BIT(bit)) {
-		/*
-		 * According to the BSpec, DW_IIR bits cannot be cleared without
-		 * first servicing the Selector & Shared IIR registers.
-		 */
-		gen11_gt_engine_identity(gt, bank, bit);
-
-		/*
-		 * We locked GT INT DW by reading it. If we want to (try
-		 * to) recover from this succesfully, we need to clear
-		 * our bit, otherwise we are locking the register for
-		 * everybody.
-		 */
-		raw_reg_write(regs, GEN11_GT_INTR_DW(bank), BIT(bit));
-
-		return true;
-	}
-
-	return false;
-}
-
 /**
  * ilk_update_display_irq - update DEIMR
  * @dev_priv: driver private
@@ -395,39 +327,6 @@ void ilk_update_display_irq(struct drm_i915_private *dev_priv,
 	}
 }
 
-/**
- * ilk_update_gt_irq - update GTIMR
- * @dev_priv: driver private
- * @interrupt_mask: mask of interrupt bits to update
- * @enabled_irq_mask: mask of interrupt bits to enable
- */
-static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
-			      u32 interrupt_mask,
-			      u32 enabled_irq_mask)
-{
-	lockdep_assert_held(&dev_priv->irq_lock);
-
-	WARN_ON(enabled_irq_mask & ~interrupt_mask);
-
-	if (WARN_ON(!intel_irqs_enabled(dev_priv)))
-		return;
-
-	dev_priv->gt_irq_mask &= ~interrupt_mask;
-	dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
-	I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
-}
-
-void gen5_enable_gt_irq(struct drm_i915_private *dev_priv, u32 mask)
-{
-	ilk_update_gt_irq(dev_priv, mask, mask);
-	intel_uncore_posting_read_fw(&dev_priv->uncore, GTIMR);
-}
-
-void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, u32 mask)
-{
-	ilk_update_gt_irq(dev_priv, mask, 0);
-}
-
 static i915_reg_t gen6_pm_iir(struct drm_i915_private *dev_priv)
 {
 	WARN_ON_ONCE(INTEL_GEN(dev_priv) >= 11);
@@ -441,7 +340,7 @@ void gen11_reset_rps_interrupts(struct drm_i915_private *dev_priv)
 
 	spin_lock_irq(&gt->irq_lock);
 
-	while (gen11_reset_one_iir(gt, 0, GEN11_GTPM))
+	while (gen11_gt_reset_one_iir(gt, 0, GEN11_GTPM))
 		;
 
 	dev_priv->gt_pm.rps.pm_iir = 0;
@@ -471,7 +370,7 @@ void gen6_enable_rps_interrupts(struct drm_i915_private *dev_priv)
 	WARN_ON_ONCE(rps->pm_iir);
 
 	if (INTEL_GEN(dev_priv) >= 11)
-		WARN_ON_ONCE(gen11_reset_one_iir(gt, 0, GEN11_GTPM));
+		WARN_ON_ONCE(gen11_gt_reset_one_iir(gt, 0, GEN11_GTPM));
 	else
 		WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
 
@@ -566,7 +465,7 @@ void gen11_reset_guc_interrupts(struct intel_guc *guc)
 	struct intel_gt *gt = guc_to_gt(guc);
 
 	spin_lock_irq(&gt->irq_lock);
-	gen11_reset_one_iir(gt, 0, GEN11_GUC);
+	gen11_gt_reset_one_iir(gt, 0, GEN11_GUC);
 	spin_unlock_irq(&gt->irq_lock);
 }
 
@@ -578,7 +477,7 @@ void gen11_enable_guc_interrupts(struct intel_guc *guc)
 	if (!guc->interrupts.enabled) {
 		u32 events = REG_FIELD_PREP(ENGINE1_MASK, GUC_INTR_GUC2HOST);
 
-		WARN_ON_ONCE(gen11_reset_one_iir(gt, 0, GEN11_GUC));
+		WARN_ON_ONCE(gen11_gt_reset_one_iir(gt, 0, GEN11_GUC));
 		intel_uncore_write(gt->uncore, GEN11_GUC_SG_INTR_ENABLE, events);
 		intel_uncore_write(gt->uncore, GEN11_GUC_SG_INTR_MASK, ~events);
 		guc->interrupts.enabled = true;
@@ -1379,6 +1278,7 @@ static void ivybridge_parity_work(struct work_struct *work)
 {
 	struct drm_i915_private *dev_priv =
 		container_of(work, typeof(*dev_priv), l3_parity.error_work);
+	struct intel_gt *gt = &dev_priv->gt;
 	u32 error_status, row, bank, subbank;
 	char *parity_event[6];
 	u32 misccpctl;
@@ -1440,144 +1340,13 @@ static void ivybridge_parity_work(struct work_struct *work)
 
 out:
 	WARN_ON(dev_priv->l3_parity.which_slice);
-	spin_lock_irq(&dev_priv->irq_lock);
-	gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
-	spin_unlock_irq(&dev_priv->irq_lock);
+	spin_lock_irq(&gt->irq_lock);
+	gen5_gt_enable_irq(gt, GT_PARITY_ERROR(dev_priv));
+	spin_unlock_irq(&gt->irq_lock);
 
 	mutex_unlock(&dev_priv->drm.struct_mutex);
 }
 
-static void ivybridge_parity_error_irq_handler(struct drm_i915_private *dev_priv,
-					       u32 iir)
-{
-	if (!HAS_L3_DPF(dev_priv))
-		return;
-
-	spin_lock(&dev_priv->irq_lock);
-	gen5_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
-	spin_unlock(&dev_priv->irq_lock);
-
-	iir &= GT_PARITY_ERROR(dev_priv);
-	if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
-		dev_priv->l3_parity.which_slice |= 1 << 1;
-
-	if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
-		dev_priv->l3_parity.which_slice |= 1 << 0;
-
-	queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
-}
-
-static void ilk_gt_irq_handler(struct drm_i915_private *dev_priv,
-			       u32 gt_iir)
-{
-	if (gt_iir & GT_RENDER_USER_INTERRUPT)
-		intel_engine_breadcrumbs_irq(dev_priv->engine[RCS0]);
-	if (gt_iir & ILK_BSD_USER_INTERRUPT)
-		intel_engine_breadcrumbs_irq(dev_priv->engine[VCS0]);
-}
-
-static void snb_gt_irq_handler(struct drm_i915_private *dev_priv,
-			       u32 gt_iir)
-{
-	if (gt_iir & GT_RENDER_USER_INTERRUPT)
-		intel_engine_breadcrumbs_irq(dev_priv->engine[RCS0]);
-	if (gt_iir & GT_BSD_USER_INTERRUPT)
-		intel_engine_breadcrumbs_irq(dev_priv->engine[VCS0]);
-	if (gt_iir & GT_BLT_USER_INTERRUPT)
-		intel_engine_breadcrumbs_irq(dev_priv->engine[BCS0]);
-
-	if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
-		      GT_BSD_CS_ERROR_INTERRUPT |
-		      GT_RENDER_CS_MASTER_ERROR_INTERRUPT))
-		DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir);
-
-	if (gt_iir & GT_PARITY_ERROR(dev_priv))
-		ivybridge_parity_error_irq_handler(dev_priv, gt_iir);
-}
-
-static void
-gen8_cs_irq_handler(struct intel_engine_cs *engine, u32 iir)
-{
-	bool tasklet = false;
-
-	if (iir & GT_CONTEXT_SWITCH_INTERRUPT)
-		tasklet = true;
-
-	if (iir & GT_RENDER_USER_INTERRUPT) {
-		intel_engine_breadcrumbs_irq(engine);
-		tasklet |= intel_engine_needs_breadcrumb_tasklet(engine);
-	}
-
-	if (tasklet)
-		tasklet_hi_schedule(&engine->execlists.tasklet);
-}
-
-static void gen8_gt_irq_ack(struct drm_i915_private *i915,
-			    u32 master_ctl, u32 gt_iir[4])
-{
-	void __iomem * const regs = i915->uncore.regs;
-
-#define GEN8_GT_IRQS (GEN8_GT_RCS_IRQ | \
-		      GEN8_GT_BCS_IRQ | \
-		      GEN8_GT_VCS0_IRQ | \
-		      GEN8_GT_VCS1_IRQ | \
-		      GEN8_GT_VECS_IRQ | \
-		      GEN8_GT_PM_IRQ | \
-		      GEN8_GT_GUC_IRQ)
-
-	if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
-		gt_iir[0] = raw_reg_read(regs, GEN8_GT_IIR(0));
-		if (likely(gt_iir[0]))
-			raw_reg_write(regs, GEN8_GT_IIR(0), gt_iir[0]);
-	}
-
-	if (master_ctl & (GEN8_GT_VCS0_IRQ | GEN8_GT_VCS1_IRQ)) {
-		gt_iir[1] = raw_reg_read(regs, GEN8_GT_IIR(1));
-		if (likely(gt_iir[1]))
-			raw_reg_write(regs, GEN8_GT_IIR(1), gt_iir[1]);
-	}
-
-	if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
-		gt_iir[2] = raw_reg_read(regs, GEN8_GT_IIR(2));
-		if (likely(gt_iir[2]))
-			raw_reg_write(regs, GEN8_GT_IIR(2), gt_iir[2]);
-	}
-
-	if (master_ctl & GEN8_GT_VECS_IRQ) {
-		gt_iir[3] = raw_reg_read(regs, GEN8_GT_IIR(3));
-		if (likely(gt_iir[3]))
-			raw_reg_write(regs, GEN8_GT_IIR(3), gt_iir[3]);
-	}
-}
-
-static void gen8_gt_irq_handler(struct drm_i915_private *i915,
-				u32 master_ctl, u32 gt_iir[4])
-{
-	if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
-		gen8_cs_irq_handler(i915->engine[RCS0],
-				    gt_iir[0] >> GEN8_RCS_IRQ_SHIFT);
-		gen8_cs_irq_handler(i915->engine[BCS0],
-				    gt_iir[0] >> GEN8_BCS_IRQ_SHIFT);
-	}
-
-	if (master_ctl & (GEN8_GT_VCS0_IRQ | GEN8_GT_VCS1_IRQ)) {
-		gen8_cs_irq_handler(i915->engine[VCS0],
-				    gt_iir[1] >> GEN8_VCS0_IRQ_SHIFT);
-		gen8_cs_irq_handler(i915->engine[VCS1],
-				    gt_iir[1] >> GEN8_VCS1_IRQ_SHIFT);
-	}
-
-	if (master_ctl & GEN8_GT_VECS_IRQ) {
-		gen8_cs_irq_handler(i915->engine[VECS0],
-				    gt_iir[3] >> GEN8_VECS_IRQ_SHIFT);
-	}
-
-	if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
-		gen6_rps_irq_handler(i915, gt_iir[2]);
-		guc_irq_handler(&i915->gt.uc.guc, gt_iir[2] >> 16);
-	}
-}
-
 static bool gen11_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
 {
 	switch (pin) {
@@ -1886,7 +1655,7 @@ static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
 /* The RPS events need forcewake, so we add them to a work queue and mask their
  * IMR bits until the work is done. Other interrupts can be processed without
  * the work queue. */
-static void gen11_rps_irq_handler(struct intel_gt *gt, u32 pm_iir)
+void gen11_rps_irq_handler(struct intel_gt *gt, u32 pm_iir)
 {
 	struct drm_i915_private *i915 = gt->i915;
 	struct intel_rps *rps = &i915->gt_pm.rps;
@@ -1906,7 +1675,7 @@ static void gen11_rps_irq_handler(struct intel_gt *gt, u32 pm_iir)
 	schedule_work(&rps->work);
 }
 
-static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
+void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
 {
 	struct intel_rps *rps = &dev_priv->gt_pm.rps;
 	struct intel_gt *gt = &dev_priv->gt;
@@ -1931,12 +1700,6 @@ 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 guc_irq_handler(struct intel_guc *guc, u16 iir)
-{
-	if (iir & GUC_INTR_GUC2HOST)
-		intel_guc_to_host_event_handler(guc);
-}
-
 static void i9xx_pipestat_irq_reset(struct drm_i915_private *dev_priv)
 {
 	enum pipe pipe;
@@ -2244,7 +2007,7 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
 		I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
 
 		if (gt_iir)
-			snb_gt_irq_handler(dev_priv, gt_iir);
+			gen6_gt_irq_handler(&dev_priv->gt, gt_iir);
 		if (pm_iir)
 			gen6_rps_irq_handler(dev_priv, pm_iir);
 
@@ -2302,7 +2065,7 @@ static irqreturn_t cherryview_irq_handler(int irq, void *arg)
 		ier = I915_READ(VLV_IER);
 		I915_WRITE(VLV_IER, 0);
 
-		gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
+		gen8_gt_irq_ack(&dev_priv->gt, master_ctl, gt_iir);
 
 		if (iir & I915_DISPLAY_PORT_INTERRUPT)
 			hotplug_status = i9xx_hpd_irq_ack(dev_priv);
@@ -2326,7 +2089,7 @@ static irqreturn_t cherryview_irq_handler(int irq, void *arg)
 		I915_WRITE(VLV_IER, ier);
 		I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
 
-		gen8_gt_irq_handler(dev_priv, master_ctl, gt_iir);
+		gen8_gt_irq_handler(&dev_priv->gt, master_ctl, gt_iir);
 
 		if (hotplug_status)
 			i9xx_hpd_irq_handler(dev_priv, hotplug_status);
@@ -2756,9 +2519,9 @@ static irqreturn_t ironlake_irq_handler(int irq, void *arg)
 		I915_WRITE(GTIIR, gt_iir);
 		ret = IRQ_HANDLED;
 		if (INTEL_GEN(dev_priv) >= 6)
-			snb_gt_irq_handler(dev_priv, gt_iir);
+			gen6_gt_irq_handler(&dev_priv->gt, gt_iir);
 		else
-			ilk_gt_irq_handler(dev_priv, gt_iir);
+			gen5_gt_irq_handler(&dev_priv->gt, gt_iir);
 	}
 
 	de_iir = I915_READ(DEIIR);
@@ -3069,7 +2832,7 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg)
 	}
 
 	/* Find, clear, then process each source of interrupt */
-	gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
+	gen8_gt_irq_ack(&dev_priv->gt, master_ctl, gt_iir);
 
 	/* IRQs are synced during runtime_suspend, we don't require a wakeref */
 	if (master_ctl & ~GEN8_GT_IRQS) {
@@ -3080,135 +2843,12 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg)
 
 	gen8_master_intr_enable(regs);
 
-	gen8_gt_irq_handler(dev_priv, master_ctl, gt_iir);
+	gen8_gt_irq_handler(&dev_priv->gt, master_ctl, gt_iir);
 
 	return IRQ_HANDLED;
 }
 
 static u32
-gen11_gt_engine_identity(struct intel_gt *gt,
-			 const unsigned int bank, const unsigned int bit)
-{
-	void __iomem * const regs = gt->uncore->regs;
-	u32 timeout_ts;
-	u32 ident;
-
-	lockdep_assert_held(&gt->i915->irq_lock);
-
-	raw_reg_write(regs, GEN11_IIR_REG_SELECTOR(bank), BIT(bit));
-
-	/*
-	 * NB: Specs do not specify how long to spin wait,
-	 * so we do ~100us as an educated guess.
-	 */
-	timeout_ts = (local_clock() >> 10) + 100;
-	do {
-		ident = raw_reg_read(regs, GEN11_INTR_IDENTITY_REG(bank));
-	} while (!(ident & GEN11_INTR_DATA_VALID) &&
-		 !time_after32(local_clock() >> 10, timeout_ts));
-
-	if (unlikely(!(ident & GEN11_INTR_DATA_VALID))) {
-		DRM_ERROR("INTR_IDENTITY_REG%u:%u 0x%08x not valid!\n",
-			  bank, bit, ident);
-		return 0;
-	}
-
-	raw_reg_write(regs, GEN11_INTR_IDENTITY_REG(bank),
-		      GEN11_INTR_DATA_VALID);
-
-	return ident;
-}
-
-static void
-gen11_other_irq_handler(struct intel_gt *gt, const u8 instance,
-			const u16 iir)
-{
-	if (instance == OTHER_GUC_INSTANCE)
-		return guc_irq_handler(&gt->uc.guc, iir);
-
-	if (instance == OTHER_GTPM_INSTANCE)
-		return gen11_rps_irq_handler(gt, iir);
-
-	WARN_ONCE(1, "unhandled other interrupt instance=0x%x, iir=0x%x\n",
-		  instance, iir);
-}
-
-static void
-gen11_engine_irq_handler(struct intel_gt *gt, const u8 class,
-			 const u8 instance, const u16 iir)
-{
-	struct intel_engine_cs *engine;
-
-	if (instance <= MAX_ENGINE_INSTANCE)
-		engine = gt->engine_class[class][instance];
-	else
-		engine = NULL;
-
-	if (likely(engine))
-		return gen8_cs_irq_handler(engine, iir);
-
-	WARN_ONCE(1, "unhandled engine interrupt class=0x%x, instance=0x%x\n",
-		  class, instance);
-}
-
-static void
-gen11_gt_identity_handler(struct intel_gt *gt, const u32 identity)
-{
-	const u8 class = GEN11_INTR_ENGINE_CLASS(identity);
-	const u8 instance = GEN11_INTR_ENGINE_INSTANCE(identity);
-	const u16 intr = GEN11_INTR_ENGINE_INTR(identity);
-
-	if (unlikely(!intr))
-		return;
-
-	if (class <= COPY_ENGINE_CLASS)
-		return gen11_engine_irq_handler(gt, class, instance, intr);
-
-	if (class == OTHER_CLASS)
-		return gen11_other_irq_handler(gt, instance, intr);
-
-	WARN_ONCE(1, "unknown interrupt class=0x%x, instance=0x%x, intr=0x%x\n",
-		  class, instance, intr);
-}
-
-static void
-gen11_gt_bank_handler(struct intel_gt *gt, const unsigned int bank)
-{
-	void __iomem * const regs = gt->uncore->regs;
-	unsigned long intr_dw;
-	unsigned int bit;
-
-	lockdep_assert_held(&gt->i915->irq_lock);
-
-	intr_dw = raw_reg_read(regs, GEN11_GT_INTR_DW(bank));
-
-	for_each_set_bit(bit, &intr_dw, 32) {
-		const u32 ident = gen11_gt_engine_identity(gt, bank, bit);
-
-		gen11_gt_identity_handler(gt, ident);
-	}
-
-	/* Clear must be after shared has been served for engine */
-	raw_reg_write(regs, GEN11_GT_INTR_DW(bank), intr_dw);
-}
-
-static void
-gen11_gt_irq_handler(struct intel_gt *gt, const u32 master_ctl)
-{
-	struct drm_i915_private *i915 = gt->i915;
-	unsigned int bank;
-
-	spin_lock(&i915->irq_lock);
-
-	for (bank = 0; bank < 2; bank++) {
-		if (master_ctl & GEN11_GT_DW_IRQ(bank))
-			gen11_gt_bank_handler(gt, bank);
-	}
-
-	spin_unlock(&i915->irq_lock);
-}
-
-static u32
 gen11_gu_misc_irq_ack(struct intel_gt *gt, const u32 master_ctl)
 {
 	void __iomem * const regs = gt->uncore->regs;
@@ -3516,15 +3156,6 @@ static void ibx_irq_pre_postinstall(struct drm_i915_private *dev_priv)
 	POSTING_READ(SDEIER);
 }
 
-static void gen5_gt_irq_reset(struct drm_i915_private *dev_priv)
-{
-	struct intel_uncore *uncore = &dev_priv->uncore;
-
-	GEN3_IRQ_RESET(uncore, GT);
-	if (INTEL_GEN(dev_priv) >= 6)
-		GEN3_IRQ_RESET(uncore, GEN6_PM);
-}
-
 static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
 {
 	struct intel_uncore *uncore = &dev_priv->uncore;
@@ -3589,7 +3220,7 @@ static void ironlake_irq_reset(struct drm_i915_private *dev_priv)
 		intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
 	}
 
-	gen5_gt_irq_reset(dev_priv);
+	gen5_gt_irq_reset(&dev_priv->gt);
 
 	ibx_irq_reset(dev_priv);
 }
@@ -3599,7 +3230,7 @@ static void valleyview_irq_reset(struct drm_i915_private *dev_priv)
 	I915_WRITE(VLV_MASTER_IER, 0);
 	POSTING_READ(VLV_MASTER_IER);
 
-	gen5_gt_irq_reset(dev_priv);
+	gen5_gt_irq_reset(&dev_priv->gt);
 
 	spin_lock_irq(&dev_priv->irq_lock);
 	if (dev_priv->display_irqs_enabled)
@@ -3607,16 +3238,6 @@ static void valleyview_irq_reset(struct drm_i915_private *dev_priv)
 	spin_unlock_irq(&dev_priv->irq_lock);
 }
 
-static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
-{
-	struct intel_uncore *uncore = &dev_priv->uncore;
-
-	GEN8_IRQ_RESET_NDX(uncore, GT, 0);
-	GEN8_IRQ_RESET_NDX(uncore, GT, 1);
-	GEN8_IRQ_RESET_NDX(uncore, GT, 2);
-	GEN8_IRQ_RESET_NDX(uncore, GT, 3);
-}
-
 static void gen8_irq_reset(struct drm_i915_private *dev_priv)
 {
 	struct intel_uncore *uncore = &dev_priv->uncore;
@@ -3624,7 +3245,7 @@ static void gen8_irq_reset(struct drm_i915_private *dev_priv)
 
 	gen8_master_intr_disable(dev_priv->uncore.regs);
 
-	gen8_gt_irq_reset(dev_priv);
+	gen8_gt_irq_reset(&dev_priv->gt);
 
 	intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
 	intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
@@ -3642,27 +3263,6 @@ static void gen8_irq_reset(struct drm_i915_private *dev_priv)
 		ibx_irq_reset(dev_priv);
 }
 
-static void gen11_gt_irq_reset(struct intel_gt *gt)
-{
-	struct intel_uncore *uncore = gt->uncore;
-
-	/* Disable RCS, BCS, VCS and VECS class engines. */
-	intel_uncore_write(uncore, GEN11_RENDER_COPY_INTR_ENABLE, 0);
-	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE,	  0);
-
-	/* Restore masks irqs on RCS, BCS, VCS and VECS engines. */
-	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK,	~0);
-	intel_uncore_write(uncore, GEN11_BCS_RSVD_INTR_MASK,	~0);
-	intel_uncore_write(uncore, GEN11_VCS0_VCS1_INTR_MASK,	~0);
-	intel_uncore_write(uncore, GEN11_VCS2_VCS3_INTR_MASK,	~0);
-	intel_uncore_write(uncore, GEN11_VECS0_VECS1_INTR_MASK,	~0);
-
-	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
-	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
-	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_ENABLE, 0);
-	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_MASK,  ~0);
-}
-
 static void gen11_irq_reset(struct drm_i915_private *dev_priv)
 {
 	struct intel_uncore *uncore = &dev_priv->uncore;
@@ -3744,7 +3344,7 @@ static void cherryview_irq_reset(struct drm_i915_private *dev_priv)
 	I915_WRITE(GEN8_MASTER_IRQ, 0);
 	POSTING_READ(GEN8_MASTER_IRQ);
 
-	gen8_gt_irq_reset(dev_priv);
+	gen8_gt_irq_reset(&dev_priv->gt);
 
 	GEN3_IRQ_RESET(uncore, GEN8_PCU_);
 
@@ -4057,44 +3657,6 @@ static void ibx_irq_postinstall(struct drm_i915_private *dev_priv)
 		spt_hpd_detection_setup(dev_priv);
 }
 
-static void gen5_gt_irq_postinstall(struct drm_i915_private *dev_priv)
-{
-	struct intel_uncore *uncore = &dev_priv->uncore;
-	u32 pm_irqs, gt_irqs;
-
-	pm_irqs = gt_irqs = 0;
-
-	dev_priv->gt_irq_mask = ~0;
-	if (HAS_L3_DPF(dev_priv)) {
-		/* L3 parity interrupt is always unmasked. */
-		dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev_priv);
-		gt_irqs |= GT_PARITY_ERROR(dev_priv);
-	}
-
-	gt_irqs |= GT_RENDER_USER_INTERRUPT;
-	if (IS_GEN(dev_priv, 5)) {
-		gt_irqs |= ILK_BSD_USER_INTERRUPT;
-	} else {
-		gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
-	}
-
-	GEN3_IRQ_INIT(uncore, GT, dev_priv->gt_irq_mask, gt_irqs);
-
-	if (INTEL_GEN(dev_priv) >= 6) {
-		/*
-		 * RPS interrupts will get enabled/disabled on demand when RPS
-		 * itself is enabled/disabled.
-		 */
-		if (HAS_ENGINE(dev_priv, VECS0)) {
-			pm_irqs |= PM_VEBOX_USER_INTERRUPT;
-			dev_priv->gt.pm_ier |= PM_VEBOX_USER_INTERRUPT;
-		}
-
-		dev_priv->gt.pm_imr = 0xffffffff;
-		GEN3_IRQ_INIT(uncore, GEN6_PM, dev_priv->gt.pm_imr, pm_irqs);
-	}
-}
-
 static void ironlake_irq_postinstall(struct drm_i915_private *dev_priv)
 {
 	struct intel_uncore *uncore = &dev_priv->uncore;
@@ -4128,7 +3690,7 @@ static void ironlake_irq_postinstall(struct drm_i915_private *dev_priv)
 	GEN3_IRQ_INIT(uncore, DE, dev_priv->irq_mask,
 		      display_mask | extra_mask);
 
-	gen5_gt_irq_postinstall(dev_priv);
+	gen5_gt_irq_postinstall(&dev_priv->gt);
 
 	ilk_hpd_detection_setup(dev_priv);
 
@@ -4177,7 +3739,7 @@ void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
 
 static void valleyview_irq_postinstall(struct drm_i915_private *dev_priv)
 {
-	gen5_gt_irq_postinstall(dev_priv);
+	gen5_gt_irq_postinstall(&dev_priv->gt);
 
 	spin_lock_irq(&dev_priv->irq_lock);
 	if (dev_priv->display_irqs_enabled)
@@ -4188,41 +3750,6 @@ static void valleyview_irq_postinstall(struct drm_i915_private *dev_priv)
 	POSTING_READ(VLV_MASTER_IER);
 }
 
-static void gen8_gt_irq_postinstall(struct drm_i915_private *i915)
-{
-	struct intel_gt *gt = &i915->gt;
-	struct intel_uncore *uncore = gt->uncore;
-
-	/* These are interrupts we'll toggle with the ring mask register */
-	u32 gt_interrupts[] = {
-		(GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
-		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
-		 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT |
-		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT),
-
-		(GT_RENDER_USER_INTERRUPT << GEN8_VCS0_IRQ_SHIFT |
-		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS0_IRQ_SHIFT |
-		 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
-		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT),
-
-		0,
-
-		(GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
-		 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT)
-	};
-
-	gt->pm_ier = 0x0;
-	gt->pm_imr = ~gt->pm_ier;
-	GEN8_IRQ_INIT_NDX(uncore, GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
-	GEN8_IRQ_INIT_NDX(uncore, GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
-	/*
-	 * RPS interrupts will get enabled/disabled on demand when RPS itself
-	 * is enabled/disabled. Same wil be the case for GuC interrupts.
-	 */
-	GEN8_IRQ_INIT_NDX(uncore, GT, 2, gt->pm_imr, gt->pm_ier);
-	GEN8_IRQ_INIT_NDX(uncore, GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
-}
-
 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
 {
 	struct intel_uncore *uncore = &dev_priv->uncore;
@@ -4298,7 +3825,7 @@ static void gen8_irq_postinstall(struct drm_i915_private *dev_priv)
 	if (HAS_PCH_SPLIT(dev_priv))
 		ibx_irq_pre_postinstall(dev_priv);
 
-	gen8_gt_irq_postinstall(dev_priv);
+	gen8_gt_irq_postinstall(&dev_priv->gt);
 	gen8_de_irq_postinstall(dev_priv);
 
 	if (HAS_PCH_SPLIT(dev_priv))
@@ -4307,40 +3834,6 @@ static void gen8_irq_postinstall(struct drm_i915_private *dev_priv)
 	gen8_master_intr_enable(dev_priv->uncore.regs);
 }
 
-static void gen11_gt_irq_postinstall(struct intel_gt *gt)
-{
-	const u32 irqs = GT_RENDER_USER_INTERRUPT | GT_CONTEXT_SWITCH_INTERRUPT;
-	struct intel_uncore *uncore = gt->uncore;
-	const u32 dmask = irqs << 16 | irqs;
-	const u32 smask = irqs << 16;
-
-	BUILD_BUG_ON(irqs & 0xffff0000);
-
-	/* Enable RCS, BCS, VCS and VECS class interrupts. */
-	intel_uncore_write(uncore, GEN11_RENDER_COPY_INTR_ENABLE, dmask);
-	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE, dmask);
-
-	/* Unmask irqs on RCS, BCS, VCS and VECS engines. */
-	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK, ~smask);
-	intel_uncore_write(uncore, GEN11_BCS_RSVD_INTR_MASK, ~smask);
-	intel_uncore_write(uncore, GEN11_VCS0_VCS1_INTR_MASK, ~dmask);
-	intel_uncore_write(uncore, GEN11_VCS2_VCS3_INTR_MASK, ~dmask);
-	intel_uncore_write(uncore, GEN11_VECS0_VECS1_INTR_MASK, ~dmask);
-
-	/*
-	 * RPS interrupts will get enabled/disabled on demand when RPS itself
-	 * is enabled/disabled.
-	 */
-	gt->pm_ier = 0x0;
-	gt->pm_imr = ~gt->pm_ier;
-	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
-	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
-
-	/* Same thing for GuC interrupts */
-	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_ENABLE, 0);
-	intel_uncore_write(uncore, GEN11_GUC_SG_INTR_MASK,  ~0);
-}
-
 static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
 {
 	u32 mask = SDE_GMBUS_ICP;
@@ -4383,7 +3876,7 @@ static void gen11_irq_postinstall(struct drm_i915_private *dev_priv)
 
 static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv)
 {
-	gen8_gt_irq_postinstall(dev_priv);
+	gen8_gt_irq_postinstall(&dev_priv->gt);
 
 	spin_lock_irq(&dev_priv->irq_lock);
 	if (dev_priv->display_irqs_enabled)
diff --git a/drivers/gpu/drm/i915/i915_irq.h b/drivers/gpu/drm/i915/i915_irq.h
index 42c881d8ad69..8e7e6071777e 100644
--- a/drivers/gpu/drm/i915/i915_irq.h
+++ b/drivers/gpu/drm/i915/i915_irq.h
@@ -10,6 +10,7 @@
 #include <linux/types.h>
 
 #include "display/intel_display.h"
+#include "i915_reg.h"
 
 struct drm_crtc;
 struct drm_device;
@@ -19,6 +20,10 @@ struct intel_crtc;
 struct intel_crtc;
 struct intel_gt;
 struct intel_guc;
+struct intel_uncore;
+
+void gen11_rps_irq_handler(struct intel_gt *gt, u32 pm_iir);
+void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
 
 void intel_irq_init(struct drm_i915_private *dev_priv);
 void intel_irq_fini(struct drm_i915_private *dev_priv);
@@ -127,4 +132,46 @@ void i965_disable_vblank(struct drm_crtc *crtc);
 void ilk_disable_vblank(struct drm_crtc *crtc);
 void bdw_disable_vblank(struct drm_crtc *crtc);
 
+void gen2_irq_reset(struct intel_uncore *uncore);
+void gen3_irq_reset(struct intel_uncore *uncore, i915_reg_t imr,
+		    i915_reg_t iir, i915_reg_t ier);
+
+void gen2_irq_init(struct intel_uncore *uncore,
+		   u32 imr_val, u32 ier_val);
+void gen3_irq_init(struct intel_uncore *uncore,
+		   i915_reg_t imr, u32 imr_val,
+		   i915_reg_t ier, u32 ier_val,
+		   i915_reg_t iir);
+
+#define GEN8_IRQ_RESET_NDX(uncore, type, which) \
+({ \
+	unsigned int which_ = which; \
+	gen3_irq_reset((uncore), GEN8_##type##_IMR(which_), \
+		       GEN8_##type##_IIR(which_), GEN8_##type##_IER(which_)); \
+})
+
+#define GEN3_IRQ_RESET(uncore, type) \
+	gen3_irq_reset((uncore), type##IMR, type##IIR, type##IER)
+
+#define GEN2_IRQ_RESET(uncore) \
+	gen2_irq_reset(uncore)
+
+#define GEN8_IRQ_INIT_NDX(uncore, type, which, imr_val, ier_val) \
+({ \
+	unsigned int which_ = which; \
+	gen3_irq_init((uncore), \
+		      GEN8_##type##_IMR(which_), imr_val, \
+		      GEN8_##type##_IER(which_), ier_val, \
+		      GEN8_##type##_IIR(which_)); \
+})
+
+#define GEN3_IRQ_INIT(uncore, type, imr_val, ier_val) \
+	gen3_irq_init((uncore), \
+		      type##IMR, imr_val, \
+		      type##IER, ier_val, \
+		      type##IIR)
+
+#define GEN2_IRQ_INIT(uncore, imr_val, ier_val) \
+	gen2_irq_init((uncore), imr_val, ier_val)
+
 #endif /* __I915_IRQ_H__ */