[PATCH 06/11] ctx

[Chris Wilson]

---
 drivers/gpu/drm/i915/i915_drv.c | 131 +++++++++++++++++++++++++++++-----------
 1 file changed, 97 insertions(+), 34 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 5955cc869cf4..fa619f2e67f8 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -736,22 +736,81 @@ int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
 	return i915_drm_suspend_late(dev, false);
 }
 
+struct resume_context {
+	struct kref kref;
+	struct drm_i915_private *i915;
+
+	async_cookie_t cookie;
+};
+
+static struct resume_context *resume_context(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct resume_context *ctx;
+
+	ctx = dev_priv->async_context;
+	if (ctx == NULL) {
+		ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+		if (!ctx)
+			return NULL;
+
+		kref_init(&ctx->kref);
+		ctx->i915 = dev_priv;
+
+		dev_priv->async_context = ctx;
+	}
+
+	return ctx;
+}
+
+static void resume_context_free(struct kref *kref)
+{
+	struct resume_context *ctx = container_of(kref, typeof(*ctx), kref);
+
+	kfree(ctx);
+}
+
+static struct resume_context *resume_context_get(struct resume_context *ctx)
+{
+	kref_get(&ctx->kref);
+	return ctx;
+}
+
+static void resume_context_put(struct resume_context *ctx)
+{
+	kref_put(&ctx->kref, resume_context_free);
+}
+
 static void i915_drm_complete(struct drm_device *dev)
 {
+	struct resume_context *ctx;
+
+	ctx = resume_context(dev);
+	if (!ctx)
+		return;
+
+	if (ctx->cookie)
+		async_synchronize_cookie_domain(ctx->cookie,
+						&ctx->i915->async_domain);
+
+	ctx->i915->async_context = NULL;
+	resume_context_put(ctx);
 }
 
 static int i915_drm_resume(struct drm_device *dev)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	int ret;
+	struct resume_context *ctx;
 
-	disable_rpm_wakeref_asserts(dev_priv);
+	ctx = resume_context(dev);
+	if (!ctx)
+		return -ENOMEM;
 
-	ret = i915_ggtt_enable_hw(dev);
-	if (ret)
+	disable_rpm_wakeref_asserts(ctx->i915);
+
+	if (i915_ggtt_enable_hw(dev))
 		DRM_ERROR("failed to re-enable GGTT\n");
 
-	intel_csr_ucode_resume(dev_priv);
+	intel_csr_ucode_resume(ctx->i915);
 
 	mutex_lock(&dev->struct_mutex);
 	i915_gem_restore_gtt_mappings(dev);
@@ -771,12 +830,12 @@ static int i915_drm_resume(struct drm_device *dev)
 	 * Modeset enabling in intel_modeset_init_hw() also needs working
 	 * interrupts.
 	 */
-	intel_runtime_pm_enable_interrupts(dev_priv);
+	intel_runtime_pm_enable_interrupts(ctx->i915);
 
 	mutex_lock(&dev->struct_mutex);
 	if (i915_gem_init_hw(dev)) {
 		DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
-			atomic_or(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
+			atomic_or(I915_WEDGED, &ctx->i915->gpu_error.reset_counter);
 	}
 	mutex_unlock(&dev->struct_mutex);
 
@@ -784,10 +843,10 @@ static int i915_drm_resume(struct drm_device *dev)
 
 	intel_modeset_init_hw(dev);
 
-	spin_lock_irq(&dev_priv->irq_lock);
-	if (dev_priv->display.hpd_irq_setup)
-		dev_priv->display.hpd_irq_setup(dev_priv);
-	spin_unlock_irq(&dev_priv->irq_lock);
+	spin_lock_irq(&ctx->i915->irq_lock);
+	if (ctx->i915->display.hpd_irq_setup)
+		ctx->i915->display.hpd_irq_setup(ctx->i915);
+	spin_unlock_irq(&ctx->i915->irq_lock);
 
 	intel_dp_mst_resume(dev);
 
@@ -799,7 +858,7 @@ static int i915_drm_resume(struct drm_device *dev)
 	 * bother with the tiny race here where we might loose hotplug
 	 * notifications.
 	 * */
-	intel_hpd_init(dev_priv);
+	intel_hpd_init(ctx->i915);
 	/* Config may have changed between suspend and resume */
 	drm_helper_hpd_irq_event(dev);
 
@@ -807,24 +866,28 @@ static int i915_drm_resume(struct drm_device *dev)
 
 	intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
 
-	mutex_lock(&dev_priv->modeset_restore_lock);
-	dev_priv->modeset_restore = MODESET_DONE;
-	mutex_unlock(&dev_priv->modeset_restore_lock);
+	mutex_lock(&ctx->i915->modeset_restore_lock);
+	ctx->i915->modeset_restore = MODESET_DONE;
+	mutex_unlock(&ctx->i915->modeset_restore_lock);
 
 	intel_opregion_notify_adapter(dev, PCI_D0);
 
 	drm_kms_helper_poll_enable(dev);
 
-	enable_rpm_wakeref_asserts(dev_priv);
+	enable_rpm_wakeref_asserts(ctx->i915);
 
 	return 0;
 }
 
 static int i915_drm_resume_early(struct drm_device *dev)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct resume_context *ctx;
 	int ret;
 
+	ctx = resume_context(dev);
+	if (!ctx)
+		return -ENOMEM;
+
 	/*
 	 * We have a resume ordering issue with the snd-hda driver also
 	 * requiring our device to be power up. Due to the lack of a
@@ -871,34 +934,34 @@ static int i915_drm_resume_early(struct drm_device *dev)
 
 	pci_set_master(dev->pdev);
 
-	disable_rpm_wakeref_asserts(dev_priv);
+	disable_rpm_wakeref_asserts(ctx->i915);
 
-	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-		ret = vlv_resume_prepare(dev_priv, false);
+	if (IS_VALLEYVIEW(ctx->i915) || IS_CHERRYVIEW(ctx->i915))
+		ret = vlv_resume_prepare(ctx->i915, false);
 	if (ret)
 		DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
 			  ret);
 
-	intel_uncore_early_sanitize(dev_priv, true);
+	intel_uncore_early_sanitize(ctx->i915, true);
 
-	if (IS_BROXTON(dev_priv)) {
-		if (!dev_priv->suspended_to_idle)
-			gen9_sanitize_dc_state(dev_priv);
-		bxt_disable_dc9(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		hsw_disable_pc8(dev_priv);
+	if (IS_BROXTON(ctx->i915)) {
+		if (!ctx->i915->suspended_to_idle)
+			gen9_sanitize_dc_state(ctx->i915);
+		bxt_disable_dc9(ctx->i915);
+	} else if (IS_HASWELL(ctx->i915) || IS_BROADWELL(ctx->i915)) {
+		hsw_disable_pc8(ctx->i915);
 	}
 
-	intel_uncore_sanitize(dev_priv);
+	intel_uncore_sanitize(ctx->i915);
 
-	if (IS_BROXTON(dev_priv) ||
-	    !(dev_priv->suspended_to_idle && dev_priv->csr.dmc_payload))
-		intel_power_domains_init_hw(dev_priv, true);
+	if (IS_BROXTON(ctx->i915) ||
+	    !(ctx->i915->suspended_to_idle && ctx->i915->csr.dmc_payload))
+		intel_power_domains_init_hw(ctx->i915, true);
 
-	enable_rpm_wakeref_asserts(dev_priv);
+	enable_rpm_wakeref_asserts(ctx->i915);
 
 out:
-	dev_priv->suspended_to_idle = false;
+	ctx->i915->suspended_to_idle = false;
 
 	return ret;
 }
-- 
2.8.1