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e1000e: PCIm function state support

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Due to commit: 5d8682588605 ("[misc] mei: me: allow runtime
pm for platform with D0i3")
When disconnecting the cable and reconnecting it the NIC
enters DMoff state. This caused wrong link indication
and duplex mismatch. This bug is described in:
https://bugzilla.redhat.com/show_bug.cgi?id=1689436

Checking PCIm function state and performing PHY reset after a
timeout in watchdog task solves this issue.

Signed-off-by: Vitaly Lifshits <vitaly.lifshits@intel.com>
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Vitaly Lifshits
2019-06-25 17:39:11 +03:00
committed by Jeff Kirsher
parent 59653e6497
commit def4ec6dce
2 changed files with 20 additions and 1 deletions
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3
drivers/net/ethernet/intel/e1000e/defines.h
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@@ -222,6 +222,9 @@
#define E1000_STATUS_PHYRA 0x00000400 /* PHY Reset Asserted */
#define E1000_STATUS_GIO_MASTER_ENABLE 0x00080000 /* Master Req status */
/* PCIm function state */
#define E1000_STATUS_PCIM_STATE 0x40000000
#define HALF_DUPLEX 1
#define FULL_DUPLEX 2