drm/i915: Reduce duplicated forcewake logic

Introduce a structure to track the individual forcewake domains and use
that to eliminate duplicate logic.

v2: - Rebase on latest dinq (Mika)
    - for_each_fw_domain macro (Mika)
    - Handle reset atomically, keeping the timer running (Mika)
    - for_each_fw_domain parameter ordering (Chris)
    - defer timer on new register access (Mika)

v3: - Fix forcewake_reset/get race by waiting pending timers

v4: - cond_resched and verbose warning on timer deletion (Chris)
    - need to run pending timers manually on reset

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> (v1)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Acked-by: Deepak S <deepak.s@linux.intel.com> (v2)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 26 insertions, 39 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index ac517eb07c00..4d156e65837f 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1288,14 +1288,36 @@ static int ironlake_drpc_info(struct seq_file *m)
 	return 0;
 }
 
-static int vlv_drpc_info(struct seq_file *m)
+static int i915_gen6_forcewake_count_info(struct seq_file *m, void *data)
 {
+	struct drm_info_node *node = m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_uncore_forcewake_domain *fw_domain;
+	const char *domain_names[] = {
+		"render",
+		"blitter",
+		"media",
+	};
+	int i;
+
+	spin_lock_irq(&dev_priv->uncore.lock);
+	for_each_fw_domain(fw_domain, dev_priv, i) {
+		seq_printf(m, "%s.wake_count = %u\n",
+			   domain_names[i],
+			   fw_domain->wake_count);
+	}
+	spin_unlock_irq(&dev_priv->uncore.lock);
 
+	return 0;
+}
+
+static int vlv_drpc_info(struct seq_file *m)
+{
 	struct drm_info_node *node = m->private;
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 rpmodectl1, rcctl1, pw_status;
-	unsigned fw_rendercount = 0, fw_mediacount = 0;
 
 	intel_runtime_pm_get(dev_priv);
 
@@ -1327,22 +1349,11 @@ static int vlv_drpc_info(struct seq_file *m)
 	seq_printf(m, "Media RC6 residency since boot: %u\n",
 		   I915_READ(VLV_GT_MEDIA_RC6));
 
-	spin_lock_irq(&dev_priv->uncore.lock);
-	fw_rendercount = dev_priv->uncore.fw_rendercount;
-	fw_mediacount = dev_priv->uncore.fw_mediacount;
-	spin_unlock_irq(&dev_priv->uncore.lock);
-
-	seq_printf(m, "Forcewake Render Count = %u\n", fw_rendercount);
-	seq_printf(m, "Forcewake Media Count = %u\n", fw_mediacount);
-
-
-	return 0;
+	return i915_gen6_forcewake_count_info(m, NULL);
 }
 
-
 static int gen6_drpc_info(struct seq_file *m)
 {
-
 	struct drm_info_node *node = m->private;
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1356,7 +1367,7 @@ static int gen6_drpc_info(struct seq_file *m)
 	intel_runtime_pm_get(dev_priv);
 
 	spin_lock_irq(&dev_priv->uncore.lock);
-	forcewake_count = dev_priv->uncore.forcewake_count;
+	forcewake_count = dev_priv->uncore.fw_domain[FW_DOMAIN_ID_RENDER].wake_count;
 	spin_unlock_irq(&dev_priv->uncore.lock);
 
 	if (forcewake_count) {
@@ -1984,30 +1995,6 @@ static int i915_execlists(struct seq_file *m, void *data)
 	return 0;
 }
 
-static int i915_gen6_forcewake_count_info(struct seq_file *m, void *data)
-{
-	struct drm_info_node *node = m->private;
-	struct drm_device *dev = node->minor->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	unsigned forcewake_count = 0, fw_rendercount = 0, fw_mediacount = 0;
-
-	spin_lock_irq(&dev_priv->uncore.lock);
-	if (IS_VALLEYVIEW(dev)) {
-		fw_rendercount = dev_priv->uncore.fw_rendercount;
-		fw_mediacount = dev_priv->uncore.fw_mediacount;
-	} else
-		forcewake_count = dev_priv->uncore.forcewake_count;
-	spin_unlock_irq(&dev_priv->uncore.lock);
-
-	if (IS_VALLEYVIEW(dev)) {
-		seq_printf(m, "fw_rendercount = %u\n", fw_rendercount);
-		seq_printf(m, "fw_mediacount = %u\n", fw_mediacount);
-	} else
-		seq_printf(m, "forcewake count = %u\n", forcewake_count);
-
-	return 0;
-}
-
 static const char *swizzle_string(unsigned swizzle)
 {
 	switch (swizzle) {