diff options
author | Bruce Allan <bruce.w.allan@intel.com> | 2011-03-24 03:09:03 +0000 |
---|---|---|
committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-04-13 19:19:22 -0700 |
commit | 78cd29d5a92ae5067377ad42089f2c8781312f4a (patch) | |
tree | fb9845f2fdb6c28890478c7fa8fbcfec79e4543d /drivers/net | |
parent | 2084b114e3fb0d84e5882f5ee6c7039be52da715 (diff) | |
download | op-kernel-dev-78cd29d5a92ae5067377ad42089f2c8781312f4a.zip op-kernel-dev-78cd29d5a92ae5067377ad42089f2c8781312f4a.tar.gz |
e1000e: If ASPM L0s needs to be disabled, do it prior to enabling device
Based on a patch from Naga Chumbalkar <nagananda.chumbalkar@hp.com>:
If ASPM L0s needs to be disabled due to HW errata, do it prior to
"enabling" the device. This way if the kernel ever defaults its
aspm_policy to POLICY_POWERSAVE, then the e1000e driver will get a
chance to disable ASPM on the misbehaving device *prior* to calling
pci_enable_device_mem(). This will be useful in situations
where the BIOS indicates ASPM support on the server by clearing the
ACPI FADT "ASPM Controls" bit.
Note:
The kernel (2.6.38) currently uses the BIOS "default" as its aspm_policy.
However, Linux distros can diverge from that and set the default to
"powersave".
v2: o cleanup namespace pollution of e1000e_disable_aspm(),
o fix type and initialization of the new aspm_disable_flag in a few
functions, and
o redefine FLAG2_DISABLE_ASPM_L0S to the first unused bit in
adapter->flags2.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Cc: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/e1000e/82571.c | 10 | ||||
-rw-r--r-- | drivers/net/e1000e/e1000.h | 2 | ||||
-rw-r--r-- | drivers/net/e1000e/netdev.c | 29 |
3 files changed, 30 insertions, 11 deletions
diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c index 9fedbca..ae07d37 100644 --- a/drivers/net/e1000e/82571.c +++ b/drivers/net/e1000e/82571.c @@ -431,9 +431,6 @@ static s32 e1000_get_variants_82571(struct e1000_adapter *adapter) case e1000_82573: case e1000_82574: case e1000_82583: - /* Disable ASPM L0s due to hardware errata */ - e1000e_disable_aspm(adapter->pdev, PCIE_LINK_STATE_L0S); - if (pdev->device == E1000_DEV_ID_82573L) { adapter->flags |= FLAG_HAS_JUMBO_FRAMES; adapter->max_hw_frame_size = DEFAULT_JUMBO; @@ -2066,7 +2063,8 @@ struct e1000_info e1000_82573_info = { | FLAG_HAS_SMART_POWER_DOWN | FLAG_HAS_AMT | FLAG_HAS_SWSM_ON_LOAD, - .flags2 = FLAG2_DISABLE_ASPM_L1, + .flags2 = FLAG2_DISABLE_ASPM_L1 + | FLAG2_DISABLE_ASPM_L0S, .pba = 20, .max_hw_frame_size = ETH_FRAME_LEN + ETH_FCS_LEN, .get_variants = e1000_get_variants_82571, @@ -2086,7 +2084,8 @@ struct e1000_info e1000_82574_info = { | FLAG_HAS_SMART_POWER_DOWN | FLAG_HAS_AMT | FLAG_HAS_CTRLEXT_ON_LOAD, - .flags2 = FLAG2_CHECK_PHY_HANG, + .flags2 = FLAG2_CHECK_PHY_HANG + | FLAG2_DISABLE_ASPM_L0S, .pba = 32, .max_hw_frame_size = DEFAULT_JUMBO, .get_variants = e1000_get_variants_82571, @@ -2104,6 +2103,7 @@ struct e1000_info e1000_82583_info = { | FLAG_HAS_SMART_POWER_DOWN | FLAG_HAS_AMT | FLAG_HAS_CTRLEXT_ON_LOAD, + .flags2 = FLAG2_DISABLE_ASPM_L0S, .pba = 32, .max_hw_frame_size = ETH_FRAME_LEN + ETH_FCS_LEN, .get_variants = e1000_get_variants_82571, diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h index 500896e..3be5478 100644 --- a/drivers/net/e1000e/e1000.h +++ b/drivers/net/e1000e/e1000.h @@ -458,6 +458,7 @@ struct e1000_info { #define FLAG2_HAS_PHY_STATS (1 << 4) #define FLAG2_HAS_EEE (1 << 5) #define FLAG2_DMA_BURST (1 << 6) +#define FLAG2_DISABLE_ASPM_L0S (1 << 7) #define FLAG2_DISABLE_AIM (1 << 8) #define FLAG2_CHECK_PHY_HANG (1 << 9) @@ -504,7 +505,6 @@ extern void e1000e_set_interrupt_capability(struct e1000_adapter *adapter); extern void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter); extern void e1000e_get_hw_control(struct e1000_adapter *adapter); extern void e1000e_release_hw_control(struct e1000_adapter *adapter); -extern void e1000e_disable_aspm(struct pci_dev *pdev, u16 state); extern unsigned int copybreak; diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index 8a3145e..4deb67d 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -58,6 +58,8 @@ char e1000e_driver_name[] = "e1000e"; const char e1000e_driver_version[] = DRV_VERSION; +static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state); + static const struct e1000_info *e1000_info_tbl[] = { [board_82571] = &e1000_82571_info, [board_82572] = &e1000_82572_info, @@ -5384,7 +5386,7 @@ static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state) pci_write_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, reg16); } #endif -void e1000e_disable_aspm(struct pci_dev *pdev, u16 state) +static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state) { dev_info(&pdev->dev, "Disabling ASPM %s %s\n", (state & PCIE_LINK_STATE_L0S) ? "L0s" : "", @@ -5404,13 +5406,19 @@ static int __e1000_resume(struct pci_dev *pdev) struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev_priv(netdev); struct e1000_hw *hw = &adapter->hw; + u16 aspm_disable_flag = 0; u32 err; + if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) + aspm_disable_flag = PCIE_LINK_STATE_L0S; + if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) + aspm_disable_flag |= PCIE_LINK_STATE_L1; + if (aspm_disable_flag) + e1000e_disable_aspm(pdev, aspm_disable_flag); + pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); pci_save_state(pdev); - if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) - e1000e_disable_aspm(pdev, PCIE_LINK_STATE_L1); e1000e_set_interrupt_capability(adapter); if (netif_running(netdev)) { @@ -5654,11 +5662,17 @@ static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) struct net_device *netdev = pci_get_drvdata(pdev); struct e1000_adapter *adapter = netdev_priv(netdev); struct e1000_hw *hw = &adapter->hw; + u16 aspm_disable_flag = 0; int err; pci_ers_result_t result; + if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S) + aspm_disable_flag = PCIE_LINK_STATE_L0S; if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1) - e1000e_disable_aspm(pdev, PCIE_LINK_STATE_L1); + aspm_disable_flag |= PCIE_LINK_STATE_L1; + if (aspm_disable_flag) + e1000e_disable_aspm(pdev, aspm_disable_flag); + err = pci_enable_device_mem(pdev); if (err) { dev_err(&pdev->dev, @@ -5799,12 +5813,17 @@ static int __devinit e1000_probe(struct pci_dev *pdev, resource_size_t flash_start, flash_len; static int cards_found; + u16 aspm_disable_flag = 0; int i, err, pci_using_dac; u16 eeprom_data = 0; u16 eeprom_apme_mask = E1000_EEPROM_APME; + if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S) + aspm_disable_flag = PCIE_LINK_STATE_L0S; if (ei->flags2 & FLAG2_DISABLE_ASPM_L1) - e1000e_disable_aspm(pdev, PCIE_LINK_STATE_L1); + aspm_disable_flag |= PCIE_LINK_STATE_L1; + if (aspm_disable_flag) + e1000e_disable_aspm(pdev, aspm_disable_flag); err = pci_enable_device_mem(pdev); if (err) |