From 808e0d8832cc81738f3e8df12dff0688352baf50 Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Mon, 14 Dec 2020 13:29:32 -0600 Subject: e1000e: Only run S0ix flows if shutdown succeeded If the shutdown failed, the part will be thawed and running S0ix flows will put it into an undefined state. Reported-by: Alexander Duyck Reviewed-by: Alexander Duyck Signed-off-by: Mario Limonciello Tested-by: Yijun Shen Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/e1000e/netdev.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c') diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 128ab6898070..6588f5d4a2be 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -6970,13 +6970,14 @@ static __maybe_unused int e1000e_pm_suspend(struct device *dev) e1000e_pm_freeze(dev); rc = __e1000_shutdown(pdev, false); - if (rc) + if (rc) { e1000e_pm_thaw(dev); - - /* Introduce S0ix implementation */ - if (hw->mac.type >= e1000_pch_cnp && - !e1000e_check_me(hw->adapter->pdev->device)) - e1000e_s0ix_entry_flow(adapter); + } else { + /* Introduce S0ix implementation */ + if (hw->mac.type >= e1000_pch_cnp && + !e1000e_check_me(hw->adapter->pdev->device)) + e1000e_s0ix_entry_flow(adapter); + } return rc; } -- cgit v1.2.3 From 6cecf02e77ab9bf97e9252f9fcb8f0738a6de12c Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Mon, 14 Dec 2020 13:29:34 -0600 Subject: Revert "e1000e: disable s0ix entry and exit flows for ME systems" commit e086ba2fccda ("e1000e: disable s0ix entry and exit flows for ME systems") disabled s0ix flows for systems that have various incarnations of the i219-LM ethernet controller. This changed caused power consumption regressions on the following shipping Dell Comet Lake based laptops: * Latitude 5310 * Latitude 5410 * Latitude 5410 * Latitude 5510 * Precision 3550 * Latitude 5411 * Latitude 5511 * Precision 3551 * Precision 7550 * Precision 7750 This commit was introduced because of some regressions on certain Thinkpad laptops. This comment was potentially caused by an earlier commit 632fbd5eb5b0e ("e1000e: fix S0ix flows for cable connected case"). or it was possibly caused by a system not meeting platform architectural requirements for low power consumption. Other changes made in the driver with extended timeouts are expected to make the driver more impervious to platform firmware behavior. Fixes: e086ba2fccda ("e1000e: disable s0ix entry and exit flows for ME systems") Reviewed-by: Alexander Duyck Signed-off-by: Mario Limonciello Reviewed-by: Hans de Goede Tested-by: Yijun Shen Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/e1000e/netdev.c | 45 ++---------------------------- 1 file changed, 2 insertions(+), 43 deletions(-) (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c') diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 6588f5d4a2be..b9800ba2006c 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -103,45 +103,6 @@ static const struct e1000_reg_info e1000_reg_info_tbl[] = { {0, NULL} }; -struct e1000e_me_supported { - u16 device_id; /* supported device ID */ -}; - -static const struct e1000e_me_supported me_supported[] = { - {E1000_DEV_ID_PCH_LPT_I217_LM}, - {E1000_DEV_ID_PCH_LPTLP_I218_LM}, - {E1000_DEV_ID_PCH_I218_LM2}, - {E1000_DEV_ID_PCH_I218_LM3}, - {E1000_DEV_ID_PCH_SPT_I219_LM}, - {E1000_DEV_ID_PCH_SPT_I219_LM2}, - {E1000_DEV_ID_PCH_LBG_I219_LM3}, - {E1000_DEV_ID_PCH_SPT_I219_LM4}, - {E1000_DEV_ID_PCH_SPT_I219_LM5}, - {E1000_DEV_ID_PCH_CNP_I219_LM6}, - {E1000_DEV_ID_PCH_CNP_I219_LM7}, - {E1000_DEV_ID_PCH_ICP_I219_LM8}, - {E1000_DEV_ID_PCH_ICP_I219_LM9}, - {E1000_DEV_ID_PCH_CMP_I219_LM10}, - {E1000_DEV_ID_PCH_CMP_I219_LM11}, - {E1000_DEV_ID_PCH_CMP_I219_LM12}, - {E1000_DEV_ID_PCH_TGP_I219_LM13}, - {E1000_DEV_ID_PCH_TGP_I219_LM14}, - {E1000_DEV_ID_PCH_TGP_I219_LM15}, - {0} -}; - -static bool e1000e_check_me(u16 device_id) -{ - struct e1000e_me_supported *id; - - for (id = (struct e1000e_me_supported *)me_supported; - id->device_id; id++) - if (device_id == id->device_id) - return true; - - return false; -} - /** * __ew32_prepare - prepare to write to MAC CSR register on certain parts * @hw: pointer to the HW structure @@ -6974,8 +6935,7 @@ static __maybe_unused int e1000e_pm_suspend(struct device *dev) e1000e_pm_thaw(dev); } else { /* Introduce S0ix implementation */ - if (hw->mac.type >= e1000_pch_cnp && - !e1000e_check_me(hw->adapter->pdev->device)) + if (hw->mac.type >= e1000_pch_cnp) e1000e_s0ix_entry_flow(adapter); } @@ -6991,8 +6951,7 @@ static __maybe_unused int e1000e_pm_resume(struct device *dev) int rc; /* Introduce S0ix implementation */ - if (hw->mac.type >= e1000_pch_cnp && - !e1000e_check_me(hw->adapter->pdev->device)) + if (hw->mac.type >= e1000_pch_cnp) e1000e_s0ix_exit_flow(adapter); rc = __e1000_resume(pdev); -- cgit v1.2.3 From 3c98cbf22a96c1b12f48c1b2a4680dfe5cb280f9 Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Mon, 14 Dec 2020 13:29:35 -0600 Subject: e1000e: Export S0ix flags to ethtool This flag can be used by an end user to disable S0ix flows on a buggy system or by an OEM for development purposes. If you need this flag to be persisted across reboots, it's suggested to use a udev rule to call adjust it until the kernel could have your configuration in a disallow list. Signed-off-by: Mario Limonciello Reviewed-by: Hans de Goede Tested-by: Yijun Shen Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/e1000e/netdev.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'drivers/net/ethernet/intel/e1000e/netdev.c') diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index b9800ba2006c..e9b82c209c2d 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -6923,7 +6923,6 @@ static __maybe_unused int e1000e_pm_suspend(struct device *dev) struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); struct e1000_adapter *adapter = netdev_priv(netdev); struct pci_dev *pdev = to_pci_dev(dev); - struct e1000_hw *hw = &adapter->hw; int rc; e1000e_flush_lpic(pdev); @@ -6935,7 +6934,7 @@ static __maybe_unused int e1000e_pm_suspend(struct device *dev) e1000e_pm_thaw(dev); } else { /* Introduce S0ix implementation */ - if (hw->mac.type >= e1000_pch_cnp) + if (adapter->flags2 & FLAG2_ENABLE_S0IX_FLOWS) e1000e_s0ix_entry_flow(adapter); } @@ -6947,11 +6946,10 @@ static __maybe_unused int e1000e_pm_resume(struct device *dev) struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev)); struct e1000_adapter *adapter = netdev_priv(netdev); struct pci_dev *pdev = to_pci_dev(dev); - struct e1000_hw *hw = &adapter->hw; int rc; /* Introduce S0ix implementation */ - if (hw->mac.type >= e1000_pch_cnp) + if (adapter->flags2 & FLAG2_ENABLE_S0IX_FLOWS) e1000e_s0ix_exit_flow(adapter); rc = __e1000_resume(pdev); @@ -7615,6 +7613,9 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (!(adapter->flags & FLAG_HAS_AMT)) e1000e_get_hw_control(adapter); + if (hw->mac.type >= e1000_pch_cnp) + adapter->flags2 |= FLAG2_ENABLE_S0IX_FLOWS; + strlcpy(netdev->name, "eth%d", sizeof(netdev->name)); err = register_netdev(netdev); if (err) -- cgit v1.2.3