From 48d1c812160712429c8eacbe7ca7d72c2d06ae26 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 14 Jan 2019 14:21:13 +0000 Subject: [PATCH] drm/i915: Mark up sysfs with rpm wakeref tracking As sysfs has a simple pattern of taking a rpm wakeref around the user access, we can track the local reference and drop it as soon as possible. Signed-off-by: Chris Wilson Cc: Jani Nikula Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20190114142129.24398-5-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_sysfs.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c index 53c20e103d56..2cbbf165d179 100644 --- a/drivers/gpu/drm/i915/i915_sysfs.c +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -42,11 +42,12 @@ static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev) static u32 calc_residency(struct drm_i915_private *dev_priv, i915_reg_t reg) { + intel_wakeref_t wakeref; u64 res; - intel_runtime_pm_get(dev_priv); + wakeref = intel_runtime_pm_get(dev_priv); res = intel_rc6_residency_us(dev_priv, reg); - intel_runtime_pm_put_unchecked(dev_priv); + intel_runtime_pm_put(dev_priv, wakeref); return DIV_ROUND_CLOSEST_ULL(res, 1000); } @@ -258,9 +259,10 @@ 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); + intel_wakeref_t wakeref; int ret; - intel_runtime_pm_get(dev_priv); + wakeref = intel_runtime_pm_get(dev_priv); mutex_lock(&dev_priv->pcu_lock); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { @@ -274,7 +276,7 @@ static ssize_t gt_act_freq_mhz_show(struct device *kdev, } mutex_unlock(&dev_priv->pcu_lock); - intel_runtime_pm_put_unchecked(dev_priv); + intel_runtime_pm_put(dev_priv, wakeref); return snprintf(buf, PAGE_SIZE, "%d\n", ret); } @@ -354,6 +356,7 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev, { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt_pm.rps; + intel_wakeref_t wakeref; u32 val; ssize_t ret; @@ -361,7 +364,7 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev, if (ret) return ret; - intel_runtime_pm_get(dev_priv); + wakeref = intel_runtime_pm_get(dev_priv); mutex_lock(&dev_priv->pcu_lock); @@ -371,7 +374,7 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev, val > rps->max_freq || val < rps->min_freq_softlimit) { mutex_unlock(&dev_priv->pcu_lock); - intel_runtime_pm_put_unchecked(dev_priv); + intel_runtime_pm_put(dev_priv, wakeref); return -EINVAL; } @@ -392,7 +395,7 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev, mutex_unlock(&dev_priv->pcu_lock); - intel_runtime_pm_put_unchecked(dev_priv); + intel_runtime_pm_put(dev_priv, wakeref); return ret ?: count; } @@ -412,6 +415,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev, { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); struct intel_rps *rps = &dev_priv->gt_pm.rps; + intel_wakeref_t wakeref; u32 val; ssize_t ret; @@ -419,7 +423,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev, if (ret) return ret; - intel_runtime_pm_get(dev_priv); + wakeref = intel_runtime_pm_get(dev_priv); mutex_lock(&dev_priv->pcu_lock); @@ -429,7 +433,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev, val > rps->max_freq || val > rps->max_freq_softlimit) { mutex_unlock(&dev_priv->pcu_lock); - intel_runtime_pm_put_unchecked(dev_priv); + intel_runtime_pm_put(dev_priv, wakeref); return -EINVAL; } @@ -446,7 +450,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev, mutex_unlock(&dev_priv->pcu_lock); - intel_runtime_pm_put_unchecked(dev_priv); + intel_runtime_pm_put(dev_priv, wakeref); return ret ?: count; }