[PATCH 01/59] drm/i915: Hook into the reboot notifier to cancel outstanding GPU operations

Chris Wilson chris at chris-wilson.co.uk
Thu Dec 27 17:32:09 UTC 2018


When the system is being shutdown, we no longer care about the results
of outstanding GPU operations, and so we can cancel them to speed up the
reboot. This helps most if we happen to be stuck waiting for a timeout
to declare the GPU hung.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_pci.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 6350db5503cd..284f63183e08 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -774,11 +774,25 @@ static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	return 0;
 }
 
+static void i915_pci_shutdown(struct pci_dev *pdev)
+{
+	struct drm_i915_private *i915;
+
+	i915 = pci_get_drvdata(pdev);
+	if (!i915) /* driver load aborted? */
+		return;
+
+	/* Cancel any outstanding rendering */
+	if (READ_ONCE(i915->gt.awake))
+		i915_gem_set_wedged(i915);
+}
+
 static struct pci_driver i915_pci_driver = {
 	.name = DRIVER_NAME,
 	.id_table = pciidlist,
 	.probe = i915_pci_probe,
 	.remove = i915_pci_remove,
+	.shutdown = i915_pci_shutdown,
 	.driver.pm = &i915_pm_ops,
 };
 
-- 
2.20.1



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