| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 11 May 2022 11:26:57 +0800
From: Jiawen Wu <jiawenwu@...stnetic.com>
To: netdev@...r.kernel.org
Cc: Jiawen Wu <jiawenwu@...stnetic.com>
Subject: [PATCH net-next 12/14] net: txgbe: Support power management
Add support for device power management.
Signed-off-by: Jiawen Wu <jiawenwu@...stnetic.com>
---
.../net/ethernet/wangxun/txgbe/txgbe_main.c | 82 +++++++++++++++++++
1 file changed, 82 insertions(+)
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index ab222bf9e828..474786bdec3d 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -4086,12 +4086,62 @@ int txgbe_close(struct net_device *netdev)
return 0;
}
+#ifdef CONFIG_PM
+static int txgbe_resume(struct pci_dev *pdev)
+{
+ struct txgbe_adapter *adapter;
+ struct net_device *netdev;
+ u32 err;
+
+ adapter = pci_get_drvdata(pdev);
+ netdev = adapter->netdev;
+ adapter->hw.hw_addr = adapter->io_addr;
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+ /* pci_restore_state clears dev->state_saved so call
+ * pci_save_state to restore it.
+ */
+ pci_save_state(pdev);
+
+ err = pci_enable_device_mem(pdev);
+ if (err) {
+ txgbe_dev_err("Cannot enable PCI device from suspend\n");
+ return err;
+ }
+ smp_mb__before_atomic();
+ clear_bit(__TXGBE_DISABLED, &adapter->state);
+ pci_set_master(pdev);
+
+ pci_wake_from_d3(pdev, false);
+
+ txgbe_reset(adapter);
+
+ rtnl_lock();
+
+ err = txgbe_init_interrupt_scheme(adapter);
+ if (!err && netif_running(netdev))
+ err = txgbe_open(netdev);
+
+ rtnl_unlock();
+
+ if (err)
+ return err;
+
+ netif_device_attach(netdev);
+
+ return 0;
+}
+#endif /* CONFIG_PM */
+
static int __txgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
{
struct txgbe_adapter *adapter = pci_get_drvdata(pdev);
struct net_device *netdev = adapter->netdev;
struct txgbe_hw *hw = &adapter->hw;
u32 wufc = adapter->wol;
+#ifdef CONFIG_PM
+ int retval = 0;
+#endif
netif_device_detach(netdev);
@@ -4102,6 +4152,12 @@ static int __txgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
txgbe_clear_interrupt_scheme(adapter);
+#ifdef CONFIG_PM
+ retval = pci_save_state(pdev);
+ if (retval)
+ return retval;
+#endif
+
if (wufc) {
txgbe_set_rx_mode(netdev);
txgbe_configure_rx(adapter);
@@ -4131,6 +4187,28 @@ static int __txgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
return 0;
}
+#ifdef CONFIG_PM
+static int txgbe_suspend(struct pci_dev *pdev,
+ pm_message_t __always_unused state)
+{
+ int retval;
+ bool wake;
+
+ retval = __txgbe_shutdown(pdev, &wake);
+ if (retval)
+ return retval;
+
+ if (wake) {
+ pci_prepare_to_sleep(pdev);
+ } else {
+ pci_wake_from_d3(pdev, false);
+ pci_set_power_state(pdev, PCI_D3hot);
+ }
+
+ return 0;
+}
+#endif /* CONFIG_PM */
+
static void txgbe_shutdown(struct pci_dev *pdev)
{
bool wake;
@@ -6599,6 +6677,10 @@ static struct pci_driver txgbe_driver = {
.id_table = txgbe_pci_tbl,
.probe = txgbe_probe,
.remove = txgbe_remove,
+#ifdef CONFIG_PM
+ .suspend = txgbe_suspend,
+ .resume = txgbe_resume,
+#endif
.shutdown = txgbe_shutdown,
};
--
2.27.0
Powered by blists - more mailing lists