With gen11 the interrupt registers are shared between 2 engines, with Engine1 instance being upper word and Engine0 instance being lower. Annoyingly gen11 selected the pm interrupts to be in the Engine1 instance.
Rectify the situation by shifting the access accordingly, based on gen. v2: comments, warn on overzealous rps_events Bugzilla: https://bugzilla.freedesktop.org/show_bug.cgi?id=108059 Testcase: igt/i915_pm_rps@min-max-config-loaded Cc: Chris Wilson <ch...@chris-wilson.co.uk> Signed-off-by: Mika Kuoppala <mika.kuopp...@linux.intel.com> --- drivers/gpu/drm/i915/i915_irq.c | 56 ++++++++++++++++++++++----------- drivers/gpu/drm/i915/i915_reg.h | 5 +++ 2 files changed, 43 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index eb0eb96ac751..3531ef79ae21 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -369,24 +369,41 @@ static i915_reg_t gen6_pm_iir(struct drm_i915_private *dev_priv) 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) +static void write_pm_imr(struct drm_i915_private *dev_priv) { - 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; + i915_reg_t reg; + u32 mask = dev_priv->pm_imr; + + if (INTEL_GEN(dev_priv) >= 11) { + reg = GEN11_GPM_WGBOXPERF_INTR_MASK; + /* pm is in upper half */ + mask = mask << 16; + } else if (INTEL_GEN(dev_priv) >= 8) { + reg = GEN8_GT_IMR(2); + } else { + reg = GEN6_PMIMR; + } + + I915_WRITE(reg, mask); + POSTING_READ(reg); } -static i915_reg_t gen6_pm_ier(struct drm_i915_private *dev_priv) +static void write_pm_ier(struct drm_i915_private *dev_priv) { - 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; + i915_reg_t reg; + u32 mask = dev_priv->pm_ier; + + if (INTEL_GEN(dev_priv) >= 11) { + reg = GEN11_GPM_WGBOXPERF_INTR_ENABLE; + /* pm is in upper half */ + mask = mask << 16; + } else if (INTEL_GEN(dev_priv) >= 8) { + reg = GEN8_GT_IER(2); + } else { + reg = GEN6_PMIER; + } + + I915_WRITE(reg, mask); } /** @@ -411,8 +428,7 @@ static void snb_update_pm_irq(struct drm_i915_private *dev_priv, if (new_val != dev_priv->pm_imr) { dev_priv->pm_imr = new_val; - I915_WRITE(gen6_pm_imr(dev_priv), dev_priv->pm_imr); - POSTING_READ(gen6_pm_imr(dev_priv)); + write_pm_imr(dev_priv); } } @@ -453,7 +469,7 @@ static void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, u32 enable_mas lockdep_assert_held(&dev_priv->irq_lock); dev_priv->pm_ier |= enable_mask; - I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier); + write_pm_ier(dev_priv); gen6_unmask_pm_irq(dev_priv, enable_mask); /* unmask_pm_irq provides an implicit barrier (POSTING_READ) */ } @@ -464,7 +480,7 @@ static void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, u32 disable_m dev_priv->pm_ier &= ~disable_mask; __gen6_mask_pm_irq(dev_priv, disable_mask); - I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier); + write_pm_ier(dev_priv); /* though a barrier is missing here, but don't really need a one */ } @@ -4645,6 +4661,10 @@ void intel_irq_init(struct drm_i915_private *dev_priv) GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT); + /* We share the register with other engine */ + if (INTEL_GEN(dev_priv) > 9) + GEM_WARN_ON(dev_priv->pm_rps_events & 0xffff0000); + rps->pm_intrmsk_mbz = 0; /* diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3c243025ea3e..8ad2f0a03f28 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -8704,6 +8704,11 @@ enum { #define GEN6_PMIER _MMIO(0x4402C) #define GEN6_PM_MBOX_EVENT (1 << 25) #define GEN6_PM_THERMAL_EVENT (1 << 24) + +/* + * For Gen11 these are in the upper word of the GPM_WGBOXPERF + * registers. Shifting is handled on accessing the imr and ier. + */ #define GEN6_PM_RP_DOWN_TIMEOUT (1 << 6) #define GEN6_PM_RP_UP_THRESHOLD (1 << 5) #define GEN6_PM_RP_DOWN_THRESHOLD (1 << 4) -- 2.17.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
