static int i915_runtime_suspend(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = dev->dev_private;
WARN_ON(!HAS_RUNTIME_PM(dev));
DRM_DEBUG_KMS("Suspending device\n");
i915_gem_release_all_mmaps(dev_priv);
del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
dev_priv->pm.suspended = true;
/*
* current versions of firmware which depend on this opregion
* notification have repurposed the D1 definition to mean
* "runtime suspended" vs. what you would normally expect (D3)
* to distinguish it from notifications that might be sent
* via the suspend path.
*/
intel_opregion_notify_adapter(dev, PCI_D1);
return 0;
}
static int intel_runtime_resume(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = dev->dev_private;
int ret = 0;
if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
return -ENODEV;
DRM_DEBUG_KMS("Resuming device\n");
WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));
disable_rpm_wakeref_asserts(dev_priv);
intel_opregion_notify_adapter(dev, PCI_D0);
dev_priv->pm.suspended = false;
if (intel_uncore_unclaimed_mmio(dev_priv))
DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
intel_guc_resume(dev);
if (IS_GEN6(dev_priv))
intel_init_pch_refclk(dev);
if (IS_BROXTON(dev))
ret = bxt_resume_prepare(dev_priv);
else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
hsw_disable_pc8(dev_priv);
else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
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);
gen6_update_ring_freq(dev);
intel_runtime_pm_enable_interrupts(dev_priv);
/*
* On VLV/CHV display interrupts are part of the display
* power well, so hpd is reinitialized from there. For
* everyone else do it here.
*/
if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
intel_hpd_init(dev_priv);
intel_enable_gt_powersave(dev);
enable_rpm_wakeref_asserts(dev_priv);
if (ret)
DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
else
DRM_DEBUG_KMS("Device resumed\n");
return ret;
}
static int i915_runtime_resume(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = dev->dev_private;
WARN_ON(!HAS_RUNTIME_PM(dev));
DRM_DEBUG_KMS("Resuming device\n");
intel_opregion_notify_adapter(dev, PCI_D0);
dev_priv->pm.suspended = false;
return 0;
}
static int intel_runtime_resume(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
WARN_ON(!HAS_RUNTIME_PM(dev));
DRM_DEBUG_KMS("Resuming device\n");
intel_opregion_notify_adapter(dev, PCI_D0);
dev_priv->pm.suspended = false;
if (IS_GEN6(dev)) {
ret = snb_runtime_resume(dev_priv);
} else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
ret = hsw_runtime_resume(dev_priv);
} else if (IS_VALLEYVIEW(dev)) {
ret = vlv_runtime_resume(dev_priv);
} else {
WARN_ON(1);
ret = -ENODEV;
}
/*
* 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);
gen6_update_ring_freq(dev);
intel_runtime_pm_restore_interrupts(dev);
intel_reset_gt_powersave(dev);
if (ret)
DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
else
DRM_DEBUG_KMS("Device resumed\n");
return ret;
}
static int intel_runtime_suspend(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
if (WARN_ON_ONCE(!(dev_priv->rps.enabled && intel_enable_rc6(dev))))
return -ENODEV;
if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
return -ENODEV;
DRM_DEBUG_KMS("Suspending device\n");
/*
* We could deadlock here in case another thread holding struct_mutex
* calls RPM suspend concurrently, since the RPM suspend will wait
* first for this RPM suspend to finish. In this case the concurrent
* RPM resume will be followed by its RPM suspend counterpart. Still
* for consistency return -EAGAIN, which will reschedule this suspend.
*/
if (!mutex_trylock(&dev->struct_mutex)) {
DRM_DEBUG_KMS("device lock contention, deffering suspend\n");
/*
* Bump the expiration timestamp, otherwise the suspend won't
* be rescheduled.
*/
pm_runtime_mark_last_busy(device);
return -EAGAIN;
}
disable_rpm_wakeref_asserts(dev_priv);
/*
* We are safe here against re-faults, since the fault handler takes
* an RPM reference.
*/
i915_gem_release_all_mmaps(dev_priv);
mutex_unlock(&dev->struct_mutex);
cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
intel_guc_suspend(dev);
intel_suspend_gt_powersave(dev);
intel_runtime_pm_disable_interrupts(dev_priv);
ret = intel_suspend_complete(dev_priv);
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;
}
intel_uncore_forcewake_reset(dev, false);
enable_rpm_wakeref_asserts(dev_priv);
WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));
if (intel_uncore_arm_unclaimed_mmio_detection(dev_priv))
DRM_ERROR("Unclaimed access detected prior to suspending\n");
dev_priv->pm.suspended = true;
/*
* FIXME: We really should find a document that references the arguments
* used below!
*/
if (IS_BROADWELL(dev)) {
/*
* On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
* being detected, and the call we do at intel_runtime_resume()
* won't be able to restore them. Since PCI_D3hot matches the
* actual specification and appears to be working, use it.
*/
intel_opregion_notify_adapter(dev, PCI_D3hot);
} else {
/*
* current versions of firmware which depend on this opregion
* notification have repurposed the D1 definition to mean
* "runtime suspended" vs. what you would normally expect (D3)
* to distinguish it from notifications that might be sent via
* the suspend path.
*/
intel_opregion_notify_adapter(dev, PCI_D1);
}
assert_forcewakes_inactive(dev_priv);
DRM_DEBUG_KMS("Device suspended\n");
return 0;
}
static void
assert_device_not_suspended(struct drm_i915_private *dev_priv)
{
WARN_ONCE(HAS_RUNTIME_PM(dev_priv->dev) && dev_priv->pm.suspended,
"Device suspended\n");
}
static int intel_runtime_suspend(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
if (WARN_ON_ONCE(!(dev_priv->rps.enabled && intel_enable_rc6(dev))))
return -ENODEV;
WARN_ON(!HAS_RUNTIME_PM(dev));
assert_force_wake_inactive(dev_priv);
DRM_DEBUG_KMS("Suspending device\n");
/*
* We could deadlock here in case another thread holding struct_mutex
* calls RPM suspend concurrently, since the RPM suspend will wait
* first for this RPM suspend to finish. In this case the concurrent
* RPM resume will be followed by its RPM suspend counterpart. Still
* for consistency return -EAGAIN, which will reschedule this suspend.
*/
if (!mutex_trylock(&dev->struct_mutex)) {
DRM_DEBUG_KMS("device lock contention, deffering suspend\n");
/*
* Bump the expiration timestamp, otherwise the suspend won't
* be rescheduled.
*/
pm_runtime_mark_last_busy(device);
return -EAGAIN;
}
/*
* We are safe here against re-faults, since the fault handler takes
* an RPM reference.
*/
i915_gem_release_all_mmaps(dev_priv);
mutex_unlock(&dev->struct_mutex);
/*
* rps.work can't be rearmed here, since we get here only after making
* sure the GPU is idle and the RPS freq is set to the minimum. See
* intel_mark_idle().
*/
cancel_work_sync(&dev_priv->rps.work);
intel_runtime_pm_disable_interrupts(dev);
if (IS_GEN6(dev)) {
ret = 0;
} else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
ret = hsw_runtime_suspend(dev_priv);
} else if (IS_VALLEYVIEW(dev)) {
ret = vlv_runtime_suspend(dev_priv);
} else {
ret = -ENODEV;
WARN_ON(1);
}
if (ret) {
DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
intel_runtime_pm_restore_interrupts(dev);
return ret;
}
del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
dev_priv->pm.suspended = true;
/*
* current versions of firmware which depend on this opregion
* notification have repurposed the D1 definition to mean
* "runtime suspended" vs. what you would normally expect (D3)
* to distinguish it from notifications that might be sent
* via the suspend path.
*/
intel_opregion_notify_adapter(dev, PCI_D1);
DRM_DEBUG_KMS("Device suspended\n");
return 0;
}