From: Oscar Mateo <oscar.mateo@intel.com>
Date: Thu, 5 Apr 2018 17:00:50 +0300
Subject: drm/i915/icl: Handle RPS interrupts correctly for Gen11
Git-commit: d02b98b8e28278f9f0c0f4dd3f172ffcc20fbdbd
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Using the new hierarchical interrupt infrastructure.
v2: Rebase
v3: Rebase
v4: use class/instance handler (Mika)
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180405140052.10682-3-mika.kuoppala@linux.intel.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/i915_irq.c | 73 +++++++++++++++++++++++++++++++++------
drivers/gpu/drm/i915/i915_reg.h | 1
drivers/gpu/drm/i915/intel_drv.h | 1
drivers/gpu/drm/i915/intel_pm.c | 6 +--
4 files changed, 67 insertions(+), 14 deletions(-)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -308,17 +308,29 @@ void gen5_disable_gt_irq(struct drm_i915
static i915_reg_t gen6_pm_iir(struct drm_i915_private *dev_priv)
{
+ WARN_ON_ONCE(INTEL_GEN(dev_priv) >= 11);
+
return INTEL_GEN(dev_priv) >= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR;
}
static i915_reg_t gen6_pm_imr(struct drm_i915_private *dev_priv)
{
- return INTEL_GEN(dev_priv) >= 8 ? GEN8_GT_IMR(2) : GEN6_PMIMR;
+ if (INTEL_GEN(dev_priv) >= 11)
+ return GEN11_GPM_WGBOXPERF_INTR_MASK;
+ else if (INTEL_GEN(dev_priv) >= 8)
+ return GEN8_GT_IMR(2);
+ else
+ return GEN6_PMIMR;
}
static i915_reg_t gen6_pm_ier(struct drm_i915_private *dev_priv)
{
- return INTEL_GEN(dev_priv) >= 8 ? GEN8_GT_IER(2) : GEN6_PMIER;
+ if (INTEL_GEN(dev_priv) >= 11)
+ return GEN11_GPM_WGBOXPERF_INTR_ENABLE;
+ else if (INTEL_GEN(dev_priv) >= 8)
+ return GEN8_GT_IER(2);
+ else
+ return GEN6_PMIER;
}
/**
@@ -400,6 +412,32 @@ static void gen6_disable_pm_irq(struct d
/* though a barrier is missing here, but don't really need a one */
}
+static u32
+gen11_gt_engine_identity(struct drm_i915_private * const i915,
+ const unsigned int bank, const unsigned int bit);
+
+void gen11_reset_rps_interrupts(struct drm_i915_private *dev_priv)
+{
+ u32 dw;
+
+ spin_lock_irq(&dev_priv->irq_lock);
+
+ /*
+ * According to the BSpec, DW_IIR bits cannot be cleared without
+ * first servicing the Selector & Shared IIR registers.
+ */
+ dw = I915_READ_FW(GEN11_GT_INTR_DW0);
+ while (dw & BIT(GEN11_GTPM)) {
+ gen11_gt_engine_identity(dev_priv, 0, GEN11_GTPM);
+ I915_WRITE_FW(GEN11_GT_INTR_DW0, BIT(GEN11_GTPM));
+ dw = I915_READ_FW(GEN11_GT_INTR_DW0);
+ }
+
+ dev_priv->gt_pm.rps.pm_iir = 0;
+
+ spin_unlock_irq(&dev_priv->irq_lock);
+}
+
void gen6_reset_rps_interrupts(struct drm_i915_private *dev_priv)
{
spin_lock_irq(&dev_priv->irq_lock);
@@ -415,12 +453,12 @@ void gen6_enable_rps_interrupts(struct d
if (READ_ONCE(rps->interrupts_enabled))
return;
- if (WARN_ON_ONCE(IS_GEN11(dev_priv)))
- return;
-
spin_lock_irq(&dev_priv->irq_lock);
WARN_ON_ONCE(rps->pm_iir);
- WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
+ if (INTEL_GEN(dev_priv) >= 11)
+ WARN_ON_ONCE(I915_READ_FW(GEN11_GT_INTR_DW0) & BIT(GEN11_GTPM));
+ else
+ WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
rps->interrupts_enabled = true;
gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
@@ -434,9 +472,6 @@ void gen6_disable_rps_interrupts(struct
if (!READ_ONCE(rps->interrupts_enabled))
return;
- if (WARN_ON_ONCE(IS_GEN11(dev_priv)))
- return;
-
spin_lock_irq(&dev_priv->irq_lock);
rps->interrupts_enabled = false;
@@ -453,7 +488,10 @@ void gen6_disable_rps_interrupts(struct
* state of the worker can be discarded.
*/
cancel_work_sync(&rps->work);
- gen6_reset_rps_interrupts(dev_priv);
+ if (INTEL_GEN(dev_priv) >= 11)
+ gen11_reset_rps_interrupts(dev_priv);
+ else
+ gen6_reset_rps_interrupts(dev_priv);
}
void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv)
@@ -2768,6 +2806,9 @@ static void
gen11_other_irq_handler(struct drm_i915_private * const i915,
const u8 instance, const u16 iir)
{
+ if (instance == 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);
}
@@ -3330,6 +3371,9 @@ static void gen11_gt_irq_reset(struct dr
I915_WRITE(GEN11_VCS0_VCS1_INTR_MASK, ~0);
I915_WRITE(GEN11_VCS2_VCS3_INTR_MASK, ~0);
I915_WRITE(GEN11_VECS0_VECS1_INTR_MASK, ~0);
+
+ I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
+ I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_MASK, ~0);
}
static void gen11_irq_reset(struct drm_device *dev)
@@ -3868,7 +3912,14 @@ static void gen11_gt_irq_postinstall(str
I915_WRITE(GEN11_VCS2_VCS3_INTR_MASK, ~(irqs | irqs << 16));
I915_WRITE(GEN11_VECS0_VECS1_INTR_MASK, ~(irqs | irqs << 16));
- dev_priv->pm_imr = 0xffffffff; /* TODO */
+ /*
+ * RPS interrupts will get enabled/disabled on demand when RPS itself
+ * is enabled/disabled.
+ */
+ dev_priv->pm_ier = 0x0;
+ dev_priv->pm_imr = ~dev_priv->pm_ier;
+ I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
+ I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_MASK, ~0);
}
static int gen11_irq_postinstall(struct drm_device *dev)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -188,6 +188,7 @@ static inline bool i915_mmio_reg_valid(i
#define OTHER_CLASS 4
#define MAX_ENGINE_CLASS 4
+#define OTHER_GTPM_INSTANCE 1
#define MAX_ENGINE_INSTANCE 3
/* PCI config space */
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1329,6 +1329,7 @@ void gen5_enable_gt_irq(struct drm_i915_
void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask);
void gen6_mask_pm_irq(struct drm_i915_private *dev_priv, u32 mask);
void gen6_unmask_pm_irq(struct drm_i915_private *dev_priv, u32 mask);
+void gen11_reset_rps_interrupts(struct drm_i915_private *dev_priv);
void gen6_reset_rps_interrupts(struct drm_i915_private *dev_priv);
void gen6_enable_rps_interrupts(struct drm_i915_private *dev_priv);
void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv);
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8028,10 +8028,10 @@ void intel_sanitize_gt_powersave(struct
dev_priv->gt_pm.rc6.enabled = true; /* force RC6 disabling */
intel_disable_gt_powersave(dev_priv);
- if (INTEL_GEN(dev_priv) < 11)
- gen6_reset_rps_interrupts(dev_priv);
+ if (INTEL_GEN(dev_priv) >= 11)
+ gen11_reset_rps_interrupts(dev_priv);
else
- WARN_ON_ONCE(1);
+ gen6_reset_rps_interrupts(dev_priv);
}
static inline void intel_disable_llc_pstate(struct drm_i915_private *i915)