GTT mappings are to be suspended post idling GPU and display suspend.
Currently GPU was reset in i915_gem_suspend and then GTT mappings were
suspended in i915_drm_suspend. Also part of i915_gem_suspend was about
suspending HW operations. This separated the HW/GEM suspend across reset.
To achieve the complete GEM/HW suspend prior to GPU reset we need to
separate i915_gem_suspend functionality into gem quiescing and HW
suspend. With this patch new function i915_gem_quiesce is created that
will ensure GEM is idle. i915_gem_hw_suspend will ensure all GPU HW
operations are suspended. These currently are RPS, GTT mappings
suspension.
With this patch drm suspend sequence is gem_quiesce followed by
gem_hw_suspend. Unload sequence is gem_quiesce->gem_hw_suspend->gem_fini.
v2. Split i915_gem_suspend to accommodate GTT mappings suspend as that is
not to be done till display suspend. (Chris)
v3: s/i915_gem_quiescent/i915_gem_quiesce and s/i915_gem_suspend/
i915_gem_hw_suspend. gem_hw_suspend has to be done prior to gem_fini as
engine state/GuC software state would be needed to suspend HW.
s/dev_priv/i915 in i915_gem_quiesce and i915_gem_hw_suspend.
Doing GuC suspend before suspending GTT mappings as GuC needs to access
the shared data. Limiting struct_mutex lock to only gem_sanitize.
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Cc: Oscar Mateo <oscar.mateo@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 11 +++++++----
drivers/gpu/drm/i915/i915_drv.h | 3 ++-
drivers/gpu/drm/i915/i915_gem.c | 29 ++++++++++++++++++++++-------
3 files changed, 31 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 8ed3e57..198e774e 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -693,8 +693,9 @@ static int i915_load_modeset_init(struct drm_device *dev)
return 0;
cleanup_gem:
- if (i915_gem_suspend(dev_priv))
+ if (i915_gem_quiesce(dev_priv))
DRM_ERROR("failed to idle hardware; continuing to unload!\n");
+ i915_gem_hw_suspend(dev_priv);
i915_gem_fini(dev_priv);
cleanup_uc:
intel_uc_fini_fw(dev_priv);
@@ -1395,9 +1396,11 @@ void i915_driver_unload(struct drm_device *dev)
i915_driver_unregister(dev_priv);
- if (i915_gem_suspend(dev_priv))
+ if (i915_gem_quiesce(dev_priv))
DRM_ERROR("failed to idle hardware; continuing to unload!\n");
+ i915_gem_hw_suspend(dev_priv);
+
intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
drm_atomic_helper_shutdown(dev);
@@ -1540,7 +1543,7 @@ static int i915_drm_suspend(struct drm_device *dev)
pci_save_state(pdev);
- error = i915_gem_suspend(dev_priv);
+ error = i915_gem_quiesce(dev_priv);
if (error) {
dev_err(&pdev->dev,
"GEM idle failed, resume might fail\n");
@@ -1558,7 +1561,7 @@ static int i915_drm_suspend(struct drm_device *dev)
intel_suspend_hw(dev_priv);
- i915_gem_suspend_gtt_mappings(dev_priv);
+ i915_gem_hw_suspend(dev_priv);
i915_save_state(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index bc21da2..f51abc6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3716,7 +3716,8 @@ void i915_gem_reset_engine(struct intel_engine_cs *engine,
void i915_gem_cleanup_engines(struct drm_i915_private *dev_priv);
int i915_gem_wait_for_idle(struct drm_i915_private *dev_priv,
unsigned int flags);
-int __must_check i915_gem_suspend(struct drm_i915_private *dev_priv);
+int __must_check i915_gem_quiesce(struct drm_i915_private *dev_priv);
+void i915_gem_hw_suspend(struct drm_i915_private *dev_priv);
void i915_gem_resume(struct drm_i915_private *dev_priv);
int i915_gem_fault(struct vm_fault *vmf);
int i915_gem_object_wait(struct drm_i915_gem_object *obj,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index bcf3ca5..f1a785a 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4650,13 +4650,12 @@ void i915_gem_sanitize(struct drm_i915_private *i915)
}
}
-int i915_gem_suspend(struct drm_i915_private *dev_priv)
+int i915_gem_quiesce(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
int ret;
intel_runtime_pm_get(dev_priv);
- intel_suspend_gt_powersave(dev_priv);
mutex_lock(&dev->struct_mutex);
@@ -4703,6 +4702,26 @@ int i915_gem_suspend(struct drm_i915_private *dev_priv)
goto err_unlock;
mutex_unlock(&dev->struct_mutex);
+ intel_runtime_pm_put(dev_priv);
+ return 0;
+
+err_unlock:
+ mutex_unlock(&dev->struct_mutex);
+ intel_runtime_pm_put(dev_priv);
+ return ret;
+}
+
+void i915_gem_hw_suspend(struct drm_i915_private *dev_priv)
+{
+ struct drm_device *dev = &dev_priv->drm;
+
+ intel_runtime_pm_get(dev_priv);
+ intel_suspend_gt_powersave(dev_priv);
+
+ mutex_lock(&dev->struct_mutex);
+
+ i915_gem_suspend_gtt_mappings(dev_priv);
+
/*
* Neither the BIOS, ourselves or any other kernel
* expects the system to be in execlists mode on startup,
@@ -4724,13 +4743,9 @@ int i915_gem_suspend(struct drm_i915_private *dev_priv)
*/
i915_gem_sanitize(dev_priv);
- intel_runtime_pm_put(dev_priv);
- return 0;
-
-err_unlock:
mutex_unlock(&dev->struct_mutex);
+
intel_runtime_pm_put(dev_priv);
- return ret;
}
void i915_gem_resume(struct drm_i915_private *dev_priv)
--
1.9.1
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