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author | Bruce Allan <bruce.w.allan@intel.com> | 2011-03-24 04:09:03 +0100 |
---|---|---|
committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-04-14 04:19:22 +0200 |
commit | 78cd29d5a92ae5067377ad42089f2c8781312f4a (patch) | |
tree | fb9845f2fdb6c28890478c7fa8fbcfec79e4543d /drivers/net/e1000e/82571.c | |
parent | e1000e: fix stats locking in e1000_watchdog_task (diff) | |
download | linux-78cd29d5a92ae5067377ad42089f2c8781312f4a.tar.xz linux-78cd29d5a92ae5067377ad42089f2c8781312f4a.zip |
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/e1000e/82571.c')
-rw-r--r-- | drivers/net/e1000e/82571.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c index 9fedbca66dfd..ae07d37903ba 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, |