From 974365e518617c9ce917f61aacbba07e4bedcca0 Mon Sep 17 00:00:00 2001 From: Catherine Sullivan Date: Wed, 15 Dec 2021 16:46:50 -0800 Subject: [PATCH] gve: Implement suspend/resume/shutdown Add support for suspend, resume and shutdown. Signed-off-by: Catherine Sullivan Signed-off-by: David Awogbemila Signed-off-by: David S. Miller --- drivers/net/ethernet/google/gve/gve.h | 3 ++ drivers/net/ethernet/google/gve/gve_main.c | 57 ++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index ed43b8e..950dff7 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -557,6 +557,8 @@ struct gve_priv { u32 page_alloc_fail; /* count of page alloc fails */ u32 dma_mapping_error; /* count of dma mapping errors */ u32 stats_report_trigger_cnt; /* count of device-requested stats-reports since last reset */ + u32 suspend_cnt; /* count of times suspended */ + u32 resume_cnt; /* count of times resumed */ struct workqueue_struct *gve_wq; struct work_struct service_task; struct work_struct stats_report_task; @@ -573,6 +575,7 @@ struct gve_priv { /* Gvnic device link speed from hypervisor. */ u64 link_speed; + bool up_before_suspend; /* True if dev was up before suspend */ struct gve_options_dqo_rda options_dqo_rda; struct gve_ptype_lut *ptype_lut_dqo; diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index 0864245..e545618 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -1676,6 +1676,58 @@ static void gve_remove(struct pci_dev *pdev) pci_disable_device(pdev); } +static void gve_shutdown(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct gve_priv *priv = netdev_priv(netdev); + bool was_up = netif_carrier_ok(priv->dev); + + rtnl_lock(); + if (was_up && gve_close(priv->dev)) { + /* If the dev was up, attempt to close, if close fails, reset */ + gve_reset_and_teardown(priv, was_up); + } else { + /* If the dev wasn't up or close worked, finish tearing down */ + gve_teardown_priv_resources(priv); + } + rtnl_unlock(); +} + +#ifdef CONFIG_PM +static int gve_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct gve_priv *priv = netdev_priv(netdev); + bool was_up = netif_carrier_ok(priv->dev); + + priv->suspend_cnt++; + rtnl_lock(); + if (was_up && gve_close(priv->dev)) { + /* If the dev was up, attempt to close, if close fails, reset */ + gve_reset_and_teardown(priv, was_up); + } else { + /* If the dev wasn't up or close worked, finish tearing down */ + gve_teardown_priv_resources(priv); + } + priv->up_before_suspend = was_up; + rtnl_unlock(); + return 0; +} + +static int gve_resume(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct gve_priv *priv = netdev_priv(netdev); + int err; + + priv->resume_cnt++; + rtnl_lock(); + err = gve_reset_recovery(priv, priv->up_before_suspend); + rtnl_unlock(); + return err; +} +#endif /* CONFIG_PM */ + static const struct pci_device_id gve_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_GOOGLE, PCI_DEV_ID_GVNIC) }, { } @@ -1686,6 +1738,11 @@ static struct pci_driver gvnic_driver = { .id_table = gve_id_table, .probe = gve_probe, .remove = gve_remove, + .shutdown = gve_shutdown, +#ifdef CONFIG_PM + .suspend = gve_suspend, + .resume = gve_resume, +#endif }; module_pci_driver(gvnic_driver); -- 2.7.4