FROMLIST: virtio_mmio: pm: Add notification handlers for restore and freeze
Handle restore and freeze notifications from the PM core. Expose
these to individual virtio drivers that can quiesce and resume vq
operations.
Signed-off-by: Yurii Danilovskyi <glyd@opensynergy.com>
Signed-off-by: Mikhail Golubev <Mikhail.Golubev@opensynergy.com>
Bug: 141626390
Link: https://lore.kernel.org/all/20211214161124.GA202691@opensynergy.com/
Change-Id: Ie53a16991b10c02ac125a55c4bbf04d89f0a365e
Signed-off-by: Mikhail Golubev <Mikhail.Golubev@opensynergy.com>
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 238383f..de73bd6 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -763,6 +763,26 @@
#endif
+#ifdef CONFIG_PM_SLEEP
+static int virtio_mmio_freeze(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct virtio_mmio_device *vm_dev = platform_get_drvdata(pdev);
+
+ return virtio_device_freeze(&vm_dev->vdev);
+}
+
+static int virtio_mmio_restore(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct virtio_mmio_device *vm_dev = platform_get_drvdata(pdev);
+
+ return virtio_device_restore(&vm_dev->vdev);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(virtio_mmio_pm_ops, virtio_mmio_freeze, virtio_mmio_restore);
+
/* Platform driver */
static const struct of_device_id virtio_mmio_match[] = {
@@ -786,6 +806,7 @@
.name = "virtio-mmio",
.of_match_table = virtio_mmio_match,
.acpi_match_table = ACPI_PTR(virtio_mmio_acpi_match),
+ .pm = &virtio_mmio_pm_ops,
},
};
