[Intel-gfx] [PATCH 03/14] drm/i915: Add low level set of routines for programming PM IER/IIR/IMR register set
akash.goel at intel.com
akash.goel at intel.com
Sat Jul 2 18:51:20 UTC 2016
From: Akash Goel <akash.goel at intel.com>
So far PM IER/IIR/IMR registers were being used only for Turbo related
interrupts. But interrupts coming from GuC also use the same set.
As a precursor to supporting GuC interrupts, added new low level routines
so as to allow sharing the programming of PM IER/IIR/IMR registers between
Turbo & GuC.
Also similar to PM IMR, maintaining a bitmask for PM IER register, to allow
easy sharing of it between Turbo & GuC without involving a rmw operation.
v2:
- For appropriateness & avoid any ambiguity, rename old functions
enable/disable pm_irq to mask/unmask pm_irq and rename new functions
enable/disable pm_interrupts to enable/disable pm_irq. (Tvrtko)
- Use u32 in place of uint32_t. (Tvrtko)
Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Akash Goel <akash.goel at intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_irq.c | 63 ++++++++++++++++++++++++---------
drivers/gpu/drm/i915/intel_drv.h | 3 ++
drivers/gpu/drm/i915/intel_ringbuffer.c | 4 +--
4 files changed, 53 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9ef4919..85a7103 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1806,6 +1806,7 @@ struct drm_i915_private {
};
u32 gt_irq_mask;
u32 pm_irq_mask;
+ u32 pm_ier_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 4378a65..dd5ae6d 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -314,7 +314,7 @@ static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
}
}
-void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
+void gen6_unmask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
{
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
@@ -322,28 +322,62 @@ void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
snb_update_pm_irq(dev_priv, mask, mask);
}
-static void __gen6_disable_pm_irq(struct drm_i915_private *dev_priv,
- uint32_t mask)
+static void __gen6_mask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
{
snb_update_pm_irq(dev_priv, mask, 0);
}
-void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
+void gen6_mask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
{
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
- __gen6_disable_pm_irq(dev_priv, mask);
+ __gen6_mask_pm_irq(dev_priv, mask);
}
-void gen6_reset_rps_interrupts(struct drm_i915_private *dev_priv)
+void gen6_reset_pm_irq(struct drm_i915_private *dev_priv, u32 reset_mask)
{
i915_reg_t reg = gen6_pm_iir(dev_priv);
- spin_lock_irq(&dev_priv->irq_lock);
- I915_WRITE(reg, dev_priv->pm_rps_events);
- I915_WRITE(reg, dev_priv->pm_rps_events);
+ assert_spin_locked(&dev_priv->irq_lock);
+
+ I915_WRITE(reg, reset_mask);
+ I915_WRITE(reg, reset_mask);
POSTING_READ(reg);
+}
+
+void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, u32 enable_mask)
+{
+ u32 new_val;
+
+ assert_spin_locked(&dev_priv->irq_lock);
+
+ new_val = dev_priv->pm_ier_mask;
+ new_val |= enable_mask;
+
+ dev_priv->pm_ier_mask = new_val;
+ I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier_mask);
+ gen6_unmask_pm_irq(dev_priv, enable_mask);
+}
+
+void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, u32 disable_mask)
+{
+ u32 new_val;
+
+ assert_spin_locked(&dev_priv->irq_lock);
+
+ new_val = dev_priv->pm_ier_mask;
+ new_val &= ~disable_mask;
+
+ dev_priv->pm_ier_mask = new_val;
+ __gen6_mask_pm_irq(dev_priv, disable_mask);
+ I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier_mask);
+}
+
+void gen6_reset_rps_interrupts(struct drm_i915_private *dev_priv)
+{
+ spin_lock_irq(&dev_priv->irq_lock);
+ gen6_reset_pm_irq(dev_priv, dev_priv->pm_rps_events);
dev_priv->rps.pm_iir = 0;
spin_unlock_irq(&dev_priv->irq_lock);
}
@@ -355,8 +389,6 @@ void gen6_enable_rps_interrupts(struct drm_i915_private *dev_priv)
WARN_ON(dev_priv->rps.pm_iir);
WARN_ON(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
dev_priv->rps.interrupts_enabled = true;
- I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) |
- dev_priv->pm_rps_events);
gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
spin_unlock_irq(&dev_priv->irq_lock);
@@ -379,9 +411,7 @@ void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv)
I915_WRITE(GEN6_PMINTRMSK, gen6_sanitize_rps_pm_mask(dev_priv, ~0));
- __gen6_disable_pm_irq(dev_priv, dev_priv->pm_rps_events);
- I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) &
- ~dev_priv->pm_rps_events);
+ gen6_disable_pm_irq(dev_priv, dev_priv->pm_rps_events);
spin_unlock_irq(&dev_priv->irq_lock);
@@ -1094,7 +1124,7 @@ static void gen6_pm_rps_work(struct work_struct *work)
pm_iir = dev_priv->rps.pm_iir;
dev_priv->rps.pm_iir = 0;
/* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
- gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
+ gen6_unmask_pm_irq(dev_priv, dev_priv->pm_rps_events);
client_boost = dev_priv->rps.client_boost;
dev_priv->rps.client_boost = false;
spin_unlock_irq(&dev_priv->irq_lock);
@@ -1599,7 +1629,7 @@ static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
{
if (pm_iir & dev_priv->pm_rps_events) {
spin_lock(&dev_priv->irq_lock);
- gen6_disable_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
+ gen6_mask_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
if (dev_priv->rps.interrupts_enabled) {
dev_priv->rps.pm_iir |= pm_iir & dev_priv->pm_rps_events;
queue_work(dev_priv->wq, &dev_priv->rps.work);
@@ -3770,6 +3800,7 @@ static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
gt_interrupts[0] |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
dev_priv->pm_irq_mask = 0xffffffff;
+ dev_priv->pm_ier_mask = 0x0;
GEN8_IRQ_INIT_NDX(GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
/*
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 3156d8d..cfbc08d 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1055,11 +1055,14 @@ void intel_check_pch_fifo_underruns(struct drm_i915_private *dev_priv);
/* i915_irq.c */
void gen5_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask);
void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask);
+void gen6_reset_pm_irq(struct drm_i915_private *dev_priv, u32 mask);
void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask);
void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask);
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);
+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);
u32 gen6_sanitize_rps_pm_mask(struct drm_i915_private *dev_priv, u32 mask);
void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv);
void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 04a2d14..13544f8 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1912,7 +1912,7 @@ hsw_vebox_get_irq(struct intel_engine_cs *engine)
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (engine->irq_refcount++ == 0) {
I915_WRITE_IMR(engine, ~engine->irq_enable_mask);
- gen6_enable_pm_irq(dev_priv, engine->irq_enable_mask);
+ gen6_unmask_pm_irq(dev_priv, engine->irq_enable_mask);
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
@@ -1928,7 +1928,7 @@ hsw_vebox_put_irq(struct intel_engine_cs *engine)
spin_lock_irqsave(&dev_priv->irq_lock, flags);
if (--engine->irq_refcount == 0) {
I915_WRITE_IMR(engine, ~0);
- gen6_disable_pm_irq(dev_priv, engine->irq_enable_mask);
+ gen6_mask_pm_irq(dev_priv, engine->irq_enable_mask);
}
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
}
--
1.9.2
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