Re: [PATCH 7/8] drm/i915: Rename the forcewake get/put functions

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On Monday 08 December 2014 11:57 PM, Mika Kuoppala wrote:
We have multiple forcewake domains now on recent gens. Change the
function naming to reflect this.

v2: More verbose names (Chris)

Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
---
  drivers/gpu/drm/i915/i915_debugfs.c     |  8 ++++----
  drivers/gpu/drm/i915/i915_drv.c         |  2 +-
  drivers/gpu/drm/i915/i915_drv.h         | 15 +++++----------
  drivers/gpu/drm/i915/intel_display.c    |  4 ++--
  drivers/gpu/drm/i915/intel_lrc.c        |  4 ++--
  drivers/gpu/drm/i915/intel_pm.c         | 28 ++++++++++++++--------------
  drivers/gpu/drm/i915/intel_ringbuffer.c |  4 ++--
  drivers/gpu/drm/i915/intel_uncore.c     | 18 +++++++++---------
  8 files changed, 39 insertions(+), 44 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 93390c9..ecc4b42 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1052,7 +1052,7 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
  		if (ret)
  			goto out;
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+		intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
reqf = I915_READ(GEN6_RPNSWREQ);
  		reqf &= ~GEN6_TURBO_DISABLE;
@@ -1079,7 +1079,7 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
  			cagf = (rpstat & GEN6_CAGF_MASK) >> GEN6_CAGF_SHIFT;
  		cagf *= GT_FREQUENCY_MULTIPLIER;
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+		intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  		mutex_unlock(&dev->struct_mutex);
if (IS_GEN6(dev) || IS_GEN7(dev)) {
@@ -4233,7 +4233,7 @@ static int i915_forcewake_open(struct inode *inode, struct file *file)
  		return 0;
intel_runtime_pm_get(dev_priv);
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
return 0;
  }
@@ -4246,7 +4246,7 @@ static int i915_forcewake_release(struct inode *inode, struct file *file)
  	if (INTEL_INFO(dev)->gen < 6)
  		return 0;
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  	intel_runtime_pm_put(dev_priv);
return 0;
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 706b122..011caa2 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1362,7 +1362,7 @@ static int intel_runtime_suspend(struct device *device)
  	if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
  		return -ENODEV;
- assert_force_wake_inactive(dev_priv);
+	assert_forcewakes_inactive(dev_priv);
DRM_DEBUG_KMS("Suspending device\n"); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4263084..a2a8536 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2450,6 +2450,11 @@ extern void intel_uncore_check_errors(struct drm_device *dev);
  extern void intel_uncore_fini(struct drm_device *dev);
  extern void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore);
  const char *intel_uncore_forcewake_domain_to_str(const int domain_id);
+void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
+				unsigned fw_domains);
+void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
+				unsigned fw_domains);
+void assert_forcewakes_inactive(struct drm_i915_private *dev_priv);
void
  i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
@@ -3026,16 +3031,6 @@ extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
  					    struct drm_device *dev,
  					    struct intel_display_error_state *error);
-/* On SNB platform, before reading ring registers forcewake bit
- * must be set to prevent GT core from power down and stale values being
- * returned.
- */
-void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
-			    unsigned fw_domains);
-void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
-			    unsigned fw_domains);
-void assert_force_wake_inactive(struct drm_i915_private *dev_priv);
-
  int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val);
  int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u32 mbox, u32 val);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 86c2885..d2d60f0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7863,7 +7863,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
  	 * Make sure we're not on PC8 state before disabling PC8, otherwise
  	 * we'll hang the machine. To prevent PC8 state, just enable force_wake.
  	 */
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
if (val & LCPLL_POWER_DOWN_ALLOW) {
  		val &= ~LCPLL_POWER_DOWN_ALLOW;
@@ -7893,7 +7893,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
  			DRM_ERROR("Switching back to LCPLL failed\n");
  	}
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  }
/*
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index fcb5140..be9d00b 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -297,7 +297,7 @@ static void execlists_elsp_write(struct intel_engine_cs *ring,
  	desc[3] = (u32)(temp >> 32);
  	desc[2] = (u32)temp;
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
  	I915_WRITE(RING_ELSP(ring), desc[1]);
  	I915_WRITE(RING_ELSP(ring), desc[0]);
  	I915_WRITE(RING_ELSP(ring), desc[3]);
@@ -307,7 +307,7 @@ static void execlists_elsp_write(struct intel_engine_cs *ring,
/* ELSP is a wo register, so use another nearby reg for posting instead */
  	POSTING_READ(RING_EXECLIST_STATUS(ring));
-	gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  }
static int execlists_update_context(struct drm_i915_gem_object *ctx_obj,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 78911e2..64e06a3 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -228,7 +228,7 @@ static void sandybridge_blit_fbc_update(struct drm_device *dev)
/* Blitter is part of Media powerwell on VLV. No impact of
  	 * his param in other platforms for now */
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_MEDIA);
blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
  	blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
@@ -241,7 +241,7 @@ static void sandybridge_blit_fbc_update(struct drm_device *dev)
  	I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
  	POSTING_READ(GEN6_BLITTER_ECOSKPD);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_MEDIA);
  }
static void ironlake_enable_fbc(struct drm_crtc *crtc)
@@ -4541,11 +4541,11 @@ static void valleyview_disable_rps(struct drm_device *dev)
/* we're doing forcewake before Disabling RC6,
  	 * This what the BIOS expects when going into suspend */
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
I915_WRITE(GEN6_RC_CONTROL, 0); - gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  }
static void intel_print_rc6_info(struct drm_device *dev, u32 mode)
@@ -4663,7 +4663,7 @@ static void gen9_enable_rps(struct drm_device *dev)
/* 1b: Get forcewake during program sequence. Although the driver
  	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* 2a: Disable RC states. */
  	I915_WRITE(GEN6_RC_CONTROL, 0);
@@ -4686,7 +4686,7 @@ static void gen9_enable_rps(struct drm_device *dev)
  				   GEN6_RC_CTL_EI_MODE(1) |
  				   rc6_mask);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
} @@ -4702,7 +4702,7 @@ static void gen8_enable_rps(struct drm_device *dev) /* 1c & 1d: Get forcewake during program sequence. Although the driver
  	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* 2a: Disable RC states. */
  	I915_WRITE(GEN6_RC_CONTROL, 0);
@@ -4769,7 +4769,7 @@ static void gen8_enable_rps(struct drm_device *dev)
  	dev_priv->rps.power = HIGH_POWER; /* force a reset */
  	gen6_set_rps(dev_priv->dev, dev_priv->rps.min_freq_softlimit);
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  }
static void gen6_enable_rps(struct drm_device *dev)
@@ -4797,7 +4797,7 @@ static void gen6_enable_rps(struct drm_device *dev)
  		I915_WRITE(GTFIFODBG, gtfifodbg);
  	}
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* Initialize rps frequencies */
  	gen6_init_rps_frequencies(dev);
@@ -4877,7 +4877,7 @@ static void gen6_enable_rps(struct drm_device *dev)
  			DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
  	}
- gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  }
static void __gen6_update_ring_freq(struct drm_device *dev)
@@ -5296,7 +5296,7 @@ static void cherryview_enable_rps(struct drm_device *dev)
/* 1a & 1b: Get forcewake during program sequence. Although the driver
  	 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
/* 2a: Program RC6 thresholds.*/
  	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
@@ -5364,7 +5364,7 @@ static void cherryview_enable_rps(struct drm_device *dev)
valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq); - gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  }
static void valleyview_enable_rps(struct drm_device *dev)
@@ -5385,7 +5385,7 @@ static void valleyview_enable_rps(struct drm_device *dev)
  	}
/* If VLV, Forcewake all wells, else re-direct to regular path */
-	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
  	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
@@ -5445,7 +5445,7 @@ static void valleyview_enable_rps(struct drm_device *dev)
valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq); - gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
  }
void ironlake_teardown_rc6(struct drm_device *dev)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 3887f1a..210728f 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -536,7 +536,7 @@ static int init_ring_common(struct intel_engine_cs *ring)
  	struct drm_i915_gem_object *obj = ringbuf->obj;
  	int ret = 0;
- gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
if (!stop_ring(ring)) {
  		/* G45 ring initialization often fails to reset head to zero */
@@ -608,7 +608,7 @@ static int init_ring_common(struct intel_engine_cs *ring)
  	memset(&ring->hangcheck, 0, sizeof(ring->hangcheck));
out:
-	gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
return ret;
  }
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 8021bec..509b9c9 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -232,7 +232,7 @@ static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
  	return ret;
  }
-static void gen6_force_wake_timer(unsigned long arg)
+static void intel_uncore_fw_release_timer(unsigned long arg)
  {
  	struct intel_uncore_forcewake_domain *domain = (void *)arg;
  	unsigned long irqflags;
@@ -326,10 +326,10 @@ void intel_uncore_sanitize(struct drm_device *dev)
   * Generally this is called implicitly by the register read function. However,
   * if some sequence requires the GT to not power down then this function should
   * be called at the beginning of the sequence followed by a call to
- * gen6_gt_force_wake_put() at the end of the sequence.
+ * intel_uncore_forcewake_put() at the end of the sequence.
   */
-void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
-			    unsigned fw_domains)
+void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
+				unsigned fw_domains)
  {
  	unsigned long irqflags;
  	struct intel_uncore_forcewake_domain *domain;
@@ -355,10 +355,10 @@ void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
  }
/*
- * see gen6_gt_force_wake_get()
+ * see intel_uncore_forcewake_get()
   */
-void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
-			    unsigned fw_domains)
+void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
+				unsigned fw_domains)
  {
  	unsigned long irqflags;
  	struct intel_uncore_forcewake_domain *domain;
@@ -383,7 +383,7 @@ void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
  	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
  }
-void assert_force_wake_inactive(struct drm_i915_private *dev_priv)
+void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
  {
  	struct intel_uncore_forcewake_domain *domain;
  	int id;
@@ -924,7 +924,7 @@ static void fw_domain_init(struct drm_i915_private *dev_priv,
  	d->i915 = dev_priv;
  	d->id = domain_id;
- setup_timer(&d->timer, gen6_force_wake_timer, (unsigned long)d);
+	setup_timer(&d->timer, intel_uncore_fw_release_timer, (unsigned long)d);
dev_priv->uncore.fw_domains |= (1 << domain_id);
  }

Looks fine
Reviewed-by: Deepak S<deepak.s@xxxxxxxxxxxxxxx>

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