e1000e: Add polling mechanism to indicate CSME DPG exit

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Per guidance from the CSME architecture team, it may take
up to 1 second for unconfiguring dynamic power gating mode.
Practically it can take more time. Wait up to 2.5 seconds to indicate
dynamic power gating exit from the S0ix configuration. Detect
scenarios that take more than 1 second but less than 2.5 seconds
will emit warning message.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

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Sasha Neftin 2021-06-24 11:18:46 +03:00 • committed by Tony Nguyen

parent 3e55d23171

commit ef407b86d3

3 changed files with 26 additions and 0 deletions

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drivers/net/ethernet/intel/e1000e/ich8lan.h

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drivers/net/ethernet/intel/e1000e/netdev.c

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drivers/net/ethernet/intel/e1000e/regs.h

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