[PATCH 3/8] drm/i915/xehp: Add Compute CS IRQ handlers

[Matt Roper]

Add execlists and GuC interrupts for compute CS into existing IRQ handlers.

All compute command streamers belong to the same compute class, so the
only change needed to enable their interrupts is to program their GT engine
interrupt mask registers.

CCS0 shares the register with CCS1, while CCS2 and CCS3 are in a new one.

BSpec: 50844, 54029, 54030, 53223, 53224.
Original-patch-by: Michel Thierry
Cc: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>
Cc: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt_irq.c | 15 ++++++++++++++-
 drivers/gpu/drm/i915/i915_drv.h        |  2 ++
 drivers/gpu/drm/i915/i915_reg.h        |  3 +++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
index b2de83be4d97..612281d47513 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_irq.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
@@ -96,7 +96,7 @@ gen11_gt_identity_handler(struct intel_gt *gt, const u32 identity)
 	if (unlikely(!intr))
 		return;
 
-	if (class <= COPY_ENGINE_CLASS)
+	if (class <= COPY_ENGINE_CLASS || class == COMPUTE_CLASS)
 		return gen11_engine_irq_handler(gt, class, instance, intr);
 
 	if (class == OTHER_CLASS)
@@ -178,6 +178,8 @@ void gen11_gt_irq_reset(struct intel_gt *gt)
 	/* 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);
+	if (CCS_MASK(gt))
+		intel_uncore_write(uncore, GEN12_CCS_RSVD_INTR_ENABLE, 0);
 
 	/* Restore masks irqs on RCS, BCS, VCS and VECS engines. */
 	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK,	~0);
@@ -191,6 +193,10 @@ void gen11_gt_irq_reset(struct intel_gt *gt)
 	intel_uncore_write(uncore, GEN11_VECS0_VECS1_INTR_MASK,	~0);
 	if (HAS_ENGINE(gt, VECS2) || HAS_ENGINE(gt, VECS3))
 		intel_uncore_write(uncore, GEN12_VECS2_VECS3_INTR_MASK, ~0);
+	if (HAS_ENGINE(gt, CCS0) || HAS_ENGINE(gt, CCS1))
+		intel_uncore_write(uncore, GEN12_CCS0_CCS1_INTR_MASK, ~0);
+	if (HAS_ENGINE(gt, CCS2) || HAS_ENGINE(gt, CCS3))
+		intel_uncore_write(uncore, GEN12_CCS2_CCS3_INTR_MASK, ~0);
 
 	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
 	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
@@ -218,6 +224,8 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 	/* 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);
+	if (CCS_MASK(gt))
+		intel_uncore_write(uncore, GEN12_CCS_RSVD_INTR_ENABLE, smask);
 
 	/* Unmask irqs on RCS, BCS, VCS and VECS engines. */
 	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK, ~smask);
@@ -231,6 +239,11 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 	intel_uncore_write(uncore, GEN11_VECS0_VECS1_INTR_MASK, ~dmask);
 	if (HAS_ENGINE(gt, VECS2) || HAS_ENGINE(gt, VECS3))
 		intel_uncore_write(uncore, GEN12_VECS2_VECS3_INTR_MASK, ~dmask);
+	if (HAS_ENGINE(gt, CCS0) || HAS_ENGINE(gt, CCS1))
+		intel_uncore_write(uncore, GEN12_CCS0_CCS1_INTR_MASK, ~dmask);
+	if (HAS_ENGINE(gt, CCS2) || HAS_ENGINE(gt, CCS3))
+		intel_uncore_write(uncore, GEN12_CCS2_CCS3_INTR_MASK, ~dmask);
+
 	/*
 	 * RPS interrupts will get enabled/disabled on demand when RPS itself
 	 * is enabled/disabled.
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1fd3040b6771..5b6eee5d8ade 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1573,6 +1573,8 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 	ENGINE_INSTANCES_MASK(gt, VCS0, I915_MAX_VCS)
 #define VEBOX_MASK(gt) \
 	ENGINE_INSTANCES_MASK(gt, VECS0, I915_MAX_VECS)
+#define CCS_MASK(gt) \
+	ENGINE_INSTANCES_MASK(gt, CCS0, I915_MAX_CCS)
 
 /*
  * The Gen7 cmdparser copies the scanned buffer to the ggtt for execution
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 33d6aa0b07c1..31e9c2cc4c0c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8139,6 +8139,7 @@ enum {
 #define GEN11_GPM_WGBOXPERF_INTR_ENABLE	_MMIO(0x19003c)
 #define GEN11_CRYPTO_RSVD_INTR_ENABLE	_MMIO(0x190040)
 #define GEN11_GUNIT_CSME_INTR_ENABLE	_MMIO(0x190044)
+#define GEN12_CCS_RSVD_INTR_ENABLE	_MMIO(0x190048)
 
 #define GEN11_RCS0_RSVD_INTR_MASK	_MMIO(0x190090)
 #define GEN11_BCS_RSVD_INTR_MASK	_MMIO(0x1900a0)
@@ -8152,6 +8153,8 @@ enum {
 #define GEN11_GPM_WGBOXPERF_INTR_MASK	_MMIO(0x1900ec)
 #define GEN11_CRYPTO_RSVD_INTR_MASK	_MMIO(0x1900f0)
 #define GEN11_GUNIT_CSME_INTR_MASK	_MMIO(0x1900f4)
+#define GEN12_CCS0_CCS1_INTR_MASK	_MMIO(0x190100)
+#define GEN12_CCS2_CCS3_INTR_MASK	_MMIO(0x190104)
 
 #define   ENGINE1_MASK			REG_GENMASK(31, 16)
 #define   ENGINE0_MASK			REG_GENMASK(15, 0)
-- 
2.25.4