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drm/i915: Update GEN6_PMINTRMSK setup with GuC enabled

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On Loading, GuC sets PM interrupts routing (bit 31) and clears ARAT
expired interrupt (bit 9). Host turbo also updates this register
in RPS flows. This patch ensures bit 31 and bit 9 setup by GuC persists.
ARAT timer interrupt is needed in GuC for various features. It also
facilitates halting GuC and hence achieving RC6. PM interrupt routing
will not impact RPS interrupt reception by host as GuC will redirect
them.
This patch fixes igt test pm_rc6_residency that was failing with guc
load/submission enabled. Tested with SKL GuC v6.1 and BXT GuC v5.1 and v8.7.

v2: i915_irq/i915_pm decoupling from intel_guc. (ChrisW)

v3: restructuring the mask update and rebase w.r.t Ville's patch. (ChrisW)

v4: Updating the pm_intr_keep during direct_interrupts_to_guc. (Sagar)

Cc: Chris Harris <chris.harris@intel.com>
Cc: Zhe Wang <zhe1.wang@intel.com>
Cc: Deepak S <deepak.s@intel.com>
Cc: Satyanantha, Rama Gopal M <rama.gopal.m.satyanantha@intel.com>
Cc: Akash Goel <akash.goel@intel.com>
Testcase: igt/pm_rc6_residency
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Tested-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464683307-19475-1-git-send-email-sagar.a.kamble@intel.com
This commit is contained in:
Sagar Arun Kamble 2016-05-31 13:58:27 +05:30 committed by Matt Roper
parent 1d577e02eb
commit 1800ad255c
5 changed files with 30 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -1308,6 +1308,7 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
}
seq_printf(m, "PM IER=0x%08x IMR=0x%08x ISR=0x%08x IIR=0x%08x, MASK=0x%08x\n",
pm_ier, pm_imr, pm_isr, pm_iir, pm_mask);
seq_printf(m, "pm_intr_keep: 0x%08x\n", dev_priv->rps.pm_intr_keep);
seq_printf(m, "GT_PERF_STATUS: 0x%08x\n", gt_perf_status);
seq_printf(m, "Render p-state ratio: %d\n",
(gt_perf_status & (IS_GEN9(dev) ? 0x1ff00 : 0xff00)) >> 8);

2
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1127,6 +1127,8 @@ struct intel_gen6_power_mgmt {
bool interrupts_enabled;
u32 pm_iir;
u32 pm_intr_keep;
/* Frequencies are stored in potentially platform dependent multiples.
* In other words, *_freq needs to be multiplied by X to be interesting.
* Soft limits are those which are used for the dynamic reclocking done

28
drivers/gpu/drm/i915/i915_irq.c
View File

@ -364,19 +364,7 @@ void gen6_enable_rps_interrupts(struct drm_i915_private *dev_priv)
u32 gen6_sanitize_rps_pm_mask(struct drm_i915_private *dev_priv, u32 mask)
{
/*
* SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer
* if GEN6_PM_UP_EI_EXPIRED is masked.
*
* TODO: verify if this can be reproduced on VLV,CHV.
*/
if (INTEL_INFO(dev_priv)->gen <= 7 && !IS_HASWELL(dev_priv))
mask &= ~GEN6_PM_RP_UP_EI_EXPIRED;
if (INTEL_INFO(dev_priv)->gen >= 8)
mask &= ~GEN8_PMINTR_REDIRECT_TO_NON_DISP;
return mask;
return (mask & ~dev_priv->rps.pm_intr_keep);
}
void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv)
@ -4578,6 +4566,20 @@ void intel_irq_init(struct drm_i915_private *dev_priv)
else
dev_priv->pm_rps_events = GEN6_PM_RPS_EVENTS;
dev_priv->rps.pm_intr_keep = 0;
/*
* SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer
* if GEN6_PM_UP_EI_EXPIRED is masked.
*
* TODO: verify if this can be reproduced on VLV,CHV.
*/
if (INTEL_INFO(dev_priv)->gen <= 7 && !IS_HASWELL(dev_priv))
dev_priv->rps.pm_intr_keep |= GEN6_PM_RP_UP_EI_EXPIRED;
if (INTEL_INFO(dev_priv)->gen >= 8)
dev_priv->rps.pm_intr_keep |= GEN8_PMINTR_REDIRECT_TO_NON_DISP;
INIT_DELAYED_WORK(&dev_priv->gpu_error.hangcheck_work,
i915_hangcheck_elapsed);

2
drivers/gpu/drm/i915/i915_reg.h
View File

@ -7031,7 +7031,7 @@ enum skl_disp_power_wells {
#define VLV_RCEDATA _MMIO(0xA0BC)
#define GEN6_RC6pp_THRESHOLD _MMIO(0xA0C0)
#define GEN6_PMINTRMSK _MMIO(0xA168)
#define GEN8_PMINTR_REDIRECT_TO_NON_DISP (1<<31)
#define GEN8_PMINTR_REDIRECT_TO_NON_DISP (1<<31)
#define VLV_PWRDWNUPCTL _MMIO(0xA294)
#define GEN9_MEDIA_PG_IDLE_HYSTERESIS _MMIO(0xA0C4)
#define GEN9_RENDER_PG_IDLE_HYSTERESIS _MMIO(0xA0C8)

11
drivers/gpu/drm/i915/intel_guc_loader.c
View File

@ -103,6 +103,7 @@ static void direct_interrupts_to_guc(struct drm_i915_private *dev_priv)
{
struct intel_engine_cs *engine;
int irqs;
u32 tmp;
/* tell all command streamers to forward interrupts and vblank to GuC */
irqs = _MASKED_FIELD(GFX_FORWARD_VBLANK_MASK, GFX_FORWARD_VBLANK_ALWAYS);
@ -117,6 +118,16 @@ static void direct_interrupts_to_guc(struct drm_i915_private *dev_priv)
I915_WRITE(GUC_BCS_RCS_IER, ~irqs);
I915_WRITE(GUC_VCS2_VCS1_IER, ~irqs);
I915_WRITE(GUC_WD_VECS_IER, ~irqs);
/*
* If GuC has routed PM interrupts to itself, don't keep it.
* and keep other interrupts those are unmasked by GuC.
*/
tmp = I915_READ(GEN6_PMINTRMSK);
if (tmp & GEN8_PMINTR_REDIRECT_TO_NON_DISP) {
dev_priv->rps.pm_intr_keep |= ~(tmp & ~GEN8_PMINTR_REDIRECT_TO_NON_DISP);
dev_priv->rps.pm_intr_keep &= ~GEN8_PMINTR_REDIRECT_TO_NON_DISP;
}
}
static u32 get_gttype(struct drm_i915_private *dev_priv)