From f3f87608d8d4502826a720f14cf5215cfdf6eb32 Mon Sep 17 00:00:00 2001 From: Yurii Danilovskyi Date: Tue, 14 Dec 2021 17:11:31 +0100 Subject: [PATCH] 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 Signed-off-by: Mikhail Golubev Bug: 141626390 Link: https://lore.kernel.org/all/20211214161124.GA202691@opensynergy.com/ Change-Id: Ie53a16991b10c02ac125a55c4bbf04d89f0a365e Signed-off-by: Mikhail Golubev --- drivers/virtio/virtio_mmio.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index 238383ff1064..de73bd63f6b6 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -763,6 +763,26 @@ static void vm_unregister_cmdline_devices(void) #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 @@ static struct platform_driver virtio_mmio_driver = { .name = "virtio-mmio", .of_match_table = virtio_mmio_match, .acpi_match_table = ACPI_PTR(virtio_mmio_acpi_match), + .pm = &virtio_mmio_pm_ops, }, };