These changes are preparation to handle GuC suspend/resume. Prepared
helper i915_gem_runtime_resume to reinitialize suspended gem setup.
Returning status from i915_gem_runtime_suspend.
This will be placeholder for handling any errors from uC suspend/resume
in upcoming patches. Restructured the suspend/resume routines w.r.t setup
creation and rollback order.
This also fixes issue of ordering of i915_gem_runtime_resume with
intel_runtime_pm_enable_interrupts.
v2: Fixed return from intel_runtime_resume. (Michał Winiarski)
v3: Not returning status from gem_runtime_resume. (Chris)
v4: Refined return from i915_gem_runtime_suspend. (Michal Wajdeczko)
v5: Updated jump labels. (Chris, Joonas) Removed invalid comments about
gem_runtime_resume and removed updates to i915_gem_resume. (Chris)
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Imre Deak <imre.deak@xxxxxxxxx>
Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 28 +++++++++++++++-------------
drivers/gpu/drm/i915/i915_drv.h | 3 ++-
drivers/gpu/drm/i915/i915_gem.c | 10 +++++++++-
3 files changed, 26 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a500a81..7b043d7 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2516,7 +2516,9 @@ static int intel_runtime_suspend(struct device *kdev)
* We are safe here against re-faults, since the fault handler takes
* an RPM reference.
*/
- i915_gem_runtime_suspend(dev_priv);
+ ret = i915_gem_runtime_suspend(dev_priv);
+ if (ret)
+ goto err_gem;
intel_guc_suspend(&dev_priv->guc);
@@ -2534,11 +2536,7 @@ static int intel_runtime_suspend(struct device *kdev)
if (ret) {
DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
- intel_runtime_pm_enable_interrupts(dev_priv);
-
- enable_rpm_wakeref_asserts(dev_priv);
-
- return ret;
+ goto err_disable;
}
intel_uncore_suspend(dev_priv);
@@ -2581,6 +2579,15 @@ static int intel_runtime_suspend(struct device *kdev)
DRM_DEBUG_KMS("Device suspended\n");
return 0;
+
+err_disable:
+ intel_runtime_pm_enable_interrupts(dev_priv);
+ intel_guc_resume(&dev_priv->guc);
+ i915_gem_runtime_resume(dev_priv);
+
+err_gem:
+ enable_rpm_wakeref_asserts(dev_priv);
+ return ret;
}
static int intel_runtime_resume(struct device *kdev)
@@ -2617,13 +2624,6 @@ static int intel_runtime_resume(struct device *kdev)
ret = vlv_resume_prepare(dev_priv, true);
}
- /*
- * No point of rolling back things in case of an error, as the best
- * we can do is to hope that things will still work (and disable RPM).
- */
- i915_gem_init_swizzling(dev_priv);
- i915_gem_restore_fences(dev_priv);
-
intel_runtime_pm_enable_interrupts(dev_priv);
/*
@@ -2636,6 +2636,8 @@ static int intel_runtime_resume(struct device *kdev)
intel_enable_ipc(dev_priv);
+ i915_gem_runtime_resume(dev_priv);
+
enable_rpm_wakeref_asserts(dev_priv);
if (ret)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 770305b..bc21da2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3512,7 +3512,8 @@ struct i915_vma * __must_check
int i915_gem_object_unbind(struct drm_i915_gem_object *obj);
void i915_gem_release_mmap(struct drm_i915_gem_object *obj);
-void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv);
+int i915_gem_runtime_suspend(struct drm_i915_private *dev_priv);
+void i915_gem_runtime_resume(struct drm_i915_private *dev_priv);
static inline int __sg_page_count(const struct scatterlist *sg)
{
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 276166d..facf681 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2053,7 +2053,7 @@ static void __i915_gem_object_release_mmap(struct drm_i915_gem_object *obj)
intel_runtime_pm_put(i915);
}
-void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
+int i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
{
struct drm_i915_gem_object *obj, *on;
int i;
@@ -2093,6 +2093,14 @@ void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
GEM_BUG_ON(i915_vma_has_userfault(reg->vma));
reg->dirty = true;
}
+
+ return 0;
+}
+
+void i915_gem_runtime_resume(struct drm_i915_private *dev_priv)
+{
+ i915_gem_init_swizzling(dev_priv);
+ i915_gem_restore_fences(dev_priv);
}
static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj)
--
1.9.1
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