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 and i915_gem_resume.
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)
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>
---
drivers/gpu/drm/i915/i915_drv.c | 33 +++++++++++++++++++--------------
drivers/gpu/drm/i915/i915_drv.h | 5 +++--
drivers/gpu/drm/i915/i915_gem.c | 18 ++++++++++++++++--
3 files changed, 38 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 7056bb2..502ae13 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1655,6 +1655,7 @@ static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
static int i915_drm_resume(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct pci_dev *pdev = dev_priv->drm.pdev;
int ret;
disable_rpm_wakeref_asserts(dev_priv);
@@ -1666,7 +1667,9 @@ static int i915_drm_resume(struct drm_device *dev)
intel_csr_ucode_resume(dev_priv);
- i915_gem_resume(dev_priv);
+ ret = i915_gem_resume(dev_priv);
+ if (ret)
+ dev_err(&pdev->dev, "GEM resume failed\n");
i915_restore_state(dev_priv);
intel_pps_unlock_regs_wa(dev_priv);
@@ -2495,7 +2498,9 @@ 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_suspend;
intel_guc_suspend(dev_priv);
@@ -2513,11 +2518,7 @@ 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_suspend_complete;
}
intel_uncore_suspend(dev_priv);
@@ -2560,6 +2561,15 @@ static int intel_runtime_suspend(struct device *kdev)
DRM_DEBUG_KMS("Device suspended\n");
return 0;
+
+err_suspend_complete:
+ intel_runtime_pm_enable_interrupts(dev_priv);
+ intel_guc_resume(dev_priv);
+ i915_gem_runtime_resume(dev_priv);
+
+err_gem_suspend:
+ enable_rpm_wakeref_asserts(dev_priv);
+ return ret;
}
static int intel_runtime_resume(struct device *kdev)
@@ -2596,13 +2606,6 @@ 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);
/*
@@ -2615,6 +2618,8 @@ 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 b7cba89..42f3d89 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3479,7 +3479,8 @@ 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)
{
@@ -3682,7 +3683,7 @@ void i915_gem_reset_engine(struct intel_engine_cs *engine,
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);
-void i915_gem_resume(struct drm_i915_private *dev_priv);
+int 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,
unsigned int flags,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 73eeb6b..59a88f2 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2022,7 +2022,7 @@ int i915_gem_fault(struct vm_fault *vmf)
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;
@@ -2065,6 +2065,18 @@ void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
GEM_BUG_ON(!list_empty(®->vma->obj->userfault_link));
reg->dirty = true;
}
+
+ return 0;
+}
+
+void i915_gem_runtime_resume(struct drm_i915_private *dev_priv)
+{
+ /*
+ * 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);
}
static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj)
@@ -4587,7 +4599,7 @@ int i915_gem_suspend(struct drm_i915_private *dev_priv)
return ret;
}
-void i915_gem_resume(struct drm_i915_private *dev_priv)
+int i915_gem_resume(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
@@ -4603,6 +4615,8 @@ void i915_gem_resume(struct drm_i915_private *dev_priv)
dev_priv->gt.resume(dev_priv);
mutex_unlock(&dev->struct_mutex);
+
+ return 0;
}
void i915_gem_init_swizzling(struct drm_i915_private *dev_priv)
--
1.9.1
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