[PATCH 56/83] drm/i915: Lift sideband locking for vlv_punit_(read|write)

Chris Wilson chris at chris-wilson.co.uk
Sat Jun 30 09:19:49 UTC 2018


Lift the sideband acquisition for vlv_punit_read and vlv_punit_write
into their callers, so that we can lock the sideband once for a sequence
of operations, rather than perform the heavyweight acquisition on each
request.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_debugfs.c     |  3 ++
 drivers/gpu/drm/i915/i915_sysfs.c       | 14 ++++----
 drivers/gpu/drm/i915/intel_cdclk.c      | 24 ++++++++++---
 drivers/gpu/drm/i915/intel_display.c    | 16 +++++----
 drivers/gpu/drm/i915/intel_pm.c         | 46 ++++++++++++++++++++-----
 drivers/gpu/drm/i915/intel_runtime_pm.c |  8 +++++
 drivers/gpu/drm/i915/intel_sideband.c   | 18 ++--------
 7 files changed, 86 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 1250af92f06c..7d94189560ec 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1090,7 +1090,10 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
 			   yesno((rpmodectl & GEN6_RP_MEDIA_MODE_MASK) ==
 				  GEN6_RP_MEDIA_SW_MODE));
 
+		vlv_punit_get(dev_priv);
 		freq_sts = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
+		vlv_punit_put(dev_priv);
+
 		seq_printf(m, "PUNIT_REG_GPU_FREQ_STS: 0x%08x\n", freq_sts);
 		seq_printf(m, "DDR freq: %d MHz\n", dev_priv->mem_freq);
 
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index e5e6f6bb2b05..0519e00b3720 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -258,25 +258,25 @@ static ssize_t gt_act_freq_mhz_show(struct device *kdev,
 				    struct device_attribute *attr, char *buf)
 {
 	struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
-	int ret;
+	u32 freq;
 
 	intel_runtime_pm_get(dev_priv);
 
 	mutex_lock(&dev_priv->pcu_lock);
 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
-		u32 freq;
+		vlv_punit_get(dev_priv);
 		freq = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
-		ret = intel_gpu_freq(dev_priv, (freq >> 8) & 0xff);
+		vlv_punit_put(dev_priv);
+
+		freq = (freq >> 8) & 0xff;
 	} else {
-		ret = intel_gpu_freq(dev_priv,
-				     intel_get_cagf(dev_priv,
-						    I915_READ(GEN6_RPSTAT1)));
+		freq = intel_get_cagf(dev_priv, I915_READ(GEN6_RPSTAT1));
 	}
 	mutex_unlock(&dev_priv->pcu_lock);
 
 	intel_runtime_pm_put(dev_priv);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", ret);
+	return snprintf(buf, PAGE_SIZE, "%d\n", intel_gpu_freq(dev_priv, freq));
 }
 
 static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c
index 36ef4678f658..c3939bb2c19b 100644
--- a/drivers/gpu/drm/i915/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/intel_cdclk.c
@@ -461,13 +461,19 @@ static void vlv_get_cdclk(struct drm_i915_private *dev_priv,
 {
 	u32 val;
 
+	mutex_lock(&dev_priv->pcu_lock);
+	vlv_iosf_sb_get(dev_priv,
+			BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT));
+
 	cdclk_state->vco = vlv_get_hpll_vco(dev_priv);
 	cdclk_state->cdclk = vlv_get_cck_clock(dev_priv, "cdclk",
 					       CCK_DISPLAY_CLOCK_CONTROL,
 					       cdclk_state->vco);
 
-	mutex_lock(&dev_priv->pcu_lock);
 	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
+
+	vlv_iosf_sb_put(dev_priv,
+			BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT));
 	mutex_unlock(&dev_priv->pcu_lock);
 
 	if (IS_VALLEYVIEW(dev_priv))
@@ -540,6 +546,11 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
 	 */
 	intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A);
 
+	vlv_iosf_sb_get(dev_priv,
+			BIT(VLV_IOSF_SB_CCK) |
+			BIT(VLV_IOSF_SB_BUNIT) |
+			BIT(VLV_IOSF_SB_PUNIT));
+
 	mutex_lock(&dev_priv->pcu_lock);
 	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
 	val &= ~DSPFREQGUAR_MASK;
@@ -552,9 +563,6 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
 	}
 	mutex_unlock(&dev_priv->pcu_lock);
 
-	vlv_iosf_sb_get(dev_priv,
-			BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_BUNIT));
-
 	if (cdclk == 400000) {
 		u32 divider;
 
@@ -588,7 +596,9 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
 	vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val);
 
 	vlv_iosf_sb_put(dev_priv,
-			BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_BUNIT));
+			BIT(VLV_IOSF_SB_CCK) |
+			BIT(VLV_IOSF_SB_BUNIT) |
+			BIT(VLV_IOSF_SB_PUNIT));
 
 	intel_update_cdclk(dev_priv);
 
@@ -623,6 +633,8 @@ static void chv_set_cdclk(struct drm_i915_private *dev_priv,
 	intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A);
 
 	mutex_lock(&dev_priv->pcu_lock);
+	vlv_punit_get(dev_priv);
+
 	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
 	val &= ~DSPFREQGUAR_MASK_CHV;
 	val |= (cmd << DSPFREQGUAR_SHIFT_CHV);
@@ -632,6 +644,8 @@ static void chv_set_cdclk(struct drm_i915_private *dev_priv,
 		     50)) {
 		DRM_ERROR("timed out waiting for CDclk change\n");
 	}
+
+	vlv_punit_put(dev_priv);
 	mutex_unlock(&dev_priv->pcu_lock);
 
 	intel_update_cdclk(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 265aaad87c75..88f9bdcbdda8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -184,10 +184,8 @@ int vlv_get_hpll_vco(struct drm_i915_private *dev_priv)
 	int hpll_freq, vco_freq[] = { 800, 1600, 2000, 2400 };
 
 	/* Obtain SKU information */
-	vlv_cck_get(dev_priv);
 	hpll_freq = vlv_cck_read(dev_priv, CCK_FUSE_REG) &
 		CCK_FUSE_HPLL_FREQ_MASK;
-	vlv_cck_put(dev_priv);
 
 	return vco_freq[hpll_freq] * 1000;
 }
@@ -198,10 +196,7 @@ int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
 	u32 val;
 	int divider;
 
-	vlv_cck_get(dev_priv);
 	val = vlv_cck_read(dev_priv, reg);
-	vlv_cck_put(dev_priv);
-
 	divider = val & CCK_FREQUENCY_VALUES;
 
 	WARN((val & CCK_FREQUENCY_STATUS) !=
@@ -214,11 +209,18 @@ int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
 int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
 			   const char *name, u32 reg)
 {
+	int hpll;
+
+	vlv_cck_get(dev_priv);
+
 	if (dev_priv->hpll_freq == 0)
 		dev_priv->hpll_freq = vlv_get_hpll_vco(dev_priv);
 
-	return vlv_get_cck_clock(dev_priv, name, reg,
-				 dev_priv->hpll_freq);
+	hpll = vlv_get_cck_clock(dev_priv, name, reg, dev_priv->hpll_freq);
+
+	vlv_cck_put(dev_priv);
+
+	return hpll;
 }
 
 static void intel_update_czclk(struct drm_i915_private *dev_priv)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 7ec1a744e842..5a310cb25be9 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -311,6 +311,7 @@ static void chv_set_memory_dvfs(struct drm_i915_private *dev_priv, bool enable)
 	u32 val;
 
 	mutex_lock(&dev_priv->pcu_lock);
+	vlv_punit_get(dev_priv);
 
 	val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
 	if (enable)
@@ -325,6 +326,7 @@ static void chv_set_memory_dvfs(struct drm_i915_private *dev_priv, bool enable)
 		      FORCE_DDR_FREQ_REQ_ACK) == 0, 3))
 		DRM_ERROR("timed out waiting for Punit DDR DVFS request\n");
 
+	vlv_punit_put(dev_priv);
 	mutex_unlock(&dev_priv->pcu_lock);
 }
 
@@ -333,6 +335,7 @@ static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable)
 	u32 val;
 
 	mutex_lock(&dev_priv->pcu_lock);
+	vlv_punit_get(dev_priv);
 
 	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
 	if (enable)
@@ -341,6 +344,7 @@ static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable)
 		val &= ~DSP_MAXFIFO_PM5_ENABLE;
 	vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val);
 
+	vlv_punit_put(dev_priv);
 	mutex_unlock(&dev_priv->pcu_lock);
 }
 
@@ -5857,6 +5861,7 @@ void vlv_wm_get_hw_state(struct drm_device *dev)
 
 	if (IS_CHERRYVIEW(dev_priv)) {
 		mutex_lock(&dev_priv->pcu_lock);
+		vlv_punit_get(dev_priv);
 
 		val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
 		if (val & DSP_MAXFIFO_PM5_ENABLE)
@@ -5886,6 +5891,7 @@ void vlv_wm_get_hw_state(struct drm_device *dev)
 				wm->level = VLV_WM_LEVEL_DDR_DVFS;
 		}
 
+		vlv_punit_put(dev_priv);
 		mutex_unlock(&dev_priv->pcu_lock);
 	}
 
@@ -6433,7 +6439,9 @@ static int valleyview_set_rps(struct drm_i915_private *dev_priv, u8 val)
 	I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
 
 	if (val != dev_priv->gt_pm.rps.cur_freq) {
+		vlv_punit_get(dev_priv);
 		err = vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
+		vlv_punit_put(dev_priv);
 		if (err)
 			return err;
 
@@ -7372,6 +7380,11 @@ static void valleyview_init_gt_powersave(struct drm_i915_private *dev_priv)
 
 	valleyview_setup_pctx(dev_priv);
 
+	vlv_iosf_sb_get(dev_priv,
+			BIT(VLV_IOSF_SB_PUNIT) |
+			BIT(VLV_IOSF_SB_NC) |
+			BIT(VLV_IOSF_SB_CCK));
+
 	vlv_init_gpll_ref_freq(dev_priv);
 
 	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
@@ -7409,6 +7422,11 @@ static void valleyview_init_gt_powersave(struct drm_i915_private *dev_priv)
 	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
 			 intel_gpu_freq(dev_priv, rps->min_freq),
 			 rps->min_freq);
+
+	vlv_iosf_sb_put(dev_priv,
+			BIT(VLV_IOSF_SB_PUNIT) |
+			BIT(VLV_IOSF_SB_NC) |
+			BIT(VLV_IOSF_SB_CCK));
 }
 
 static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv)
@@ -7418,11 +7436,14 @@ static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv)
 
 	cherryview_setup_pctx(dev_priv);
 
+	vlv_iosf_sb_get(dev_priv,
+			BIT(VLV_IOSF_SB_PUNIT) |
+			BIT(VLV_IOSF_SB_NC) |
+			BIT(VLV_IOSF_SB_CCK));
+
 	vlv_init_gpll_ref_freq(dev_priv);
 
-	vlv_cck_get(dev_priv);
 	val = vlv_cck_read(dev_priv, CCK_FUSE_REG);
-	vlv_cck_put(dev_priv);
 
 	switch ((val >> 2) & 0x7) {
 	case 3:
@@ -7455,6 +7476,11 @@ static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv)
 			 intel_gpu_freq(dev_priv, rps->min_freq),
 			 rps->min_freq);
 
+	vlv_iosf_sb_put(dev_priv,
+			BIT(VLV_IOSF_SB_PUNIT) |
+			BIT(VLV_IOSF_SB_NC) |
+			BIT(VLV_IOSF_SB_CCK));
+
 	WARN_ONCE((rps->max_freq | rps->efficient_freq | rps->rp1_freq |
 		   rps->min_freq) & 1,
 		  "Odd GPU freq values\n");
@@ -7542,13 +7568,15 @@ static void cherryview_enable_rps(struct drm_i915_private *dev_priv)
 		   GEN6_RP_DOWN_IDLE_AVG);
 
 	/* Setting Fixed Bias */
-	val = VLV_OVERRIDE_EN |
-		  VLV_SOC_TDP_EN |
-		  CHV_BIAS_CPU_50_SOC_50;
+	vlv_punit_get(dev_priv);
+
+	val = VLV_OVERRIDE_EN | VLV_SOC_TDP_EN | CHV_BIAS_CPU_50_SOC_50;
 	vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
 
 	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
 
+	vlv_punit_put(dev_priv);
+
 	/* RPS code assumes GPLL is used */
 	WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
 
@@ -7625,14 +7653,16 @@ static void valleyview_enable_rps(struct drm_i915_private *dev_priv)
 		   GEN6_RP_UP_BUSY_AVG |
 		   GEN6_RP_DOWN_IDLE_CONT);
 
+	vlv_punit_get(dev_priv);
+
 	/* Setting Fixed Bias */
-	val = VLV_OVERRIDE_EN |
-		  VLV_SOC_TDP_EN |
-		  VLV_BIAS_CPU_125_SOC_875;
+	val = VLV_OVERRIDE_EN | VLV_SOC_TDP_EN | VLV_BIAS_CPU_125_SOC_875;
 	vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
 
 	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
 
+	vlv_punit_put(dev_priv);
+
 	/* RPS code assumes GPLL is used */
 	WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
 
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 5acce6f982c3..548a828abda1 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -879,6 +879,7 @@ static void vlv_set_power_well(struct drm_i915_private *dev_priv,
 			 PUNIT_PWRGT_PWR_GATE(power_well_id);
 
 	mutex_lock(&dev_priv->pcu_lock);
+	vlv_punit_get(dev_priv);
 
 #define COND \
 	((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state)
@@ -899,6 +900,7 @@ static void vlv_set_power_well(struct drm_i915_private *dev_priv,
 #undef COND
 
 out:
+	vlv_punit_put(dev_priv);
 	mutex_unlock(&dev_priv->pcu_lock);
 }
 
@@ -927,6 +929,7 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
 	ctrl = PUNIT_PWRGT_PWR_ON(power_well_id);
 
 	mutex_lock(&dev_priv->pcu_lock);
+	vlv_punit_get(dev_priv);
 
 	state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
 	/*
@@ -945,6 +948,7 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
 	ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask;
 	WARN_ON(ctrl != state);
 
+	vlv_punit_put(dev_priv);
 	mutex_unlock(&dev_priv->pcu_lock);
 
 	return enabled;
@@ -1458,6 +1462,7 @@ static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
 	u32 state, ctrl;
 
 	mutex_lock(&dev_priv->pcu_lock);
+	vlv_punit_get(dev_priv);
 
 	state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe);
 	/*
@@ -1474,6 +1479,7 @@ static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
 	ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe);
 	WARN_ON(ctrl << 16 != state);
 
+	vlv_punit_put(dev_priv);
 	mutex_unlock(&dev_priv->pcu_lock);
 
 	return enabled;
@@ -1490,6 +1496,7 @@ static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
 	state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
 
 	mutex_lock(&dev_priv->pcu_lock);
+	vlv_punit_get(dev_priv);
 
 #define COND \
 	((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state)
@@ -1510,6 +1517,7 @@ static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
 #undef COND
 
 out:
+	vlv_punit_put(dev_priv);
 	mutex_unlock(&dev_priv->pcu_lock);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_sideband.c b/drivers/gpu/drm/i915/intel_sideband.c
index 3d7c5917b97c..dc3b491b4d00 100644
--- a/drivers/gpu/drm/i915/intel_sideband.c
+++ b/drivers/gpu/drm/i915/intel_sideband.c
@@ -144,30 +144,18 @@ u32 vlv_punit_read(struct drm_i915_private *dev_priv, u32 addr)
 
 	lockdep_assert_held(&dev_priv->pcu_lock);
 
-	vlv_punit_get(dev_priv);
-
 	vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
 			SB_CRRDDA_NP, addr, &val);
 
-	vlv_punit_put(dev_priv);
-
 	return val;
 }
 
 int vlv_punit_write(struct drm_i915_private *dev_priv, u32 addr, u32 val)
 {
-	int err;
-
 	lockdep_assert_held(&dev_priv->pcu_lock);
 
-	vlv_punit_get(dev_priv);
-
-	err = vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
-			      SB_CRWRDA_NP, addr, &val);
-
-	vlv_punit_put(dev_priv);
-
-	return err;
+	return vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
+			       SB_CRWRDA_NP, addr, &val);
 }
 
 void vlv_punit_get(struct drm_i915_private *dev_priv)
@@ -210,10 +198,8 @@ u32 vlv_nc_read(struct drm_i915_private *dev_priv, u8 addr)
 {
 	u32 val = 0;
 
-	vlv_nc_get(dev_priv);
 	vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_NC,
 			SB_CRRDDA_NP, addr, &val);
-	vlv_nc_put(dev_priv);
 
 	return val;
 }
-- 
2.18.0



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