Commit 3cf31b1a authored by Mario Limonciello's avatar Mario Limonciello Committed by Tony Nguyen

e1000e: bump up timeout to wait when ME un-configures ULP mode

Per guidance from Intel ethernet architecture team, it may take
up to 1 second for unconfiguring ULP mode.

However in practice this seems to be taking up to 2 seconds on
some Lenovo machines.  Detect scenarios that take more than 1 second
but less than 2.5 seconds and emit a warning on resume for those
scenarios.
Suggested-by: default avatarAaron Ma <aaron.ma@canonical.com>
Suggested-by: default avatarSasha Netfin <sasha.neftin@intel.com>
Suggested-by: default avatarHans de Goede <hdegoede@redhat.com>
CC: Mark Pearson <markpearson@lenovo.com>
Fixes: f15bb6dd ("e1000e: Add support for S0ix")
BugLink: https://bugs.launchpad.net/bugs/1865570
Link: https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20200323191639.48826-1-aaron.ma@canonical.com/
Link: https://lkml.org/lkml/2020/12/13/15
Link: https://lkml.org/lkml/2020/12/14/708Signed-off-by: default avatarMario Limonciello <mario.limonciello@dell.com>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Tested-by: default avatarYijun Shen <Yijun.shen@dell.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
parent 808e0d88
......@@ -1240,6 +1240,9 @@ static s32 e1000_disable_ulp_lpt_lp(struct e1000_hw *hw, bool force)
return 0;
if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID) {
struct e1000_adapter *adapter = hw->adapter;
bool firmware_bug = false;
if (force) {
/* Request ME un-configure ULP mode in the PHY */
mac_reg = er32(H2ME);
......@@ -1248,16 +1251,24 @@ static s32 e1000_disable_ulp_lpt_lp(struct e1000_hw *hw, bool force)
ew32(H2ME, mac_reg);
}
/* Poll up to 300msec for ME to clear ULP_CFG_DONE. */
/* Poll up to 2.5 seconds for ME to clear ULP_CFG_DONE.
* If this takes more than 1 second, show a warning indicating a
* firmware bug
*/
while (er32(FWSM) & E1000_FWSM_ULP_CFG_DONE) {
if (i++ == 30) {
if (i++ == 250) {
ret_val = -E1000_ERR_PHY;
goto out;
}
if (i > 100 && !firmware_bug)
firmware_bug = true;
usleep_range(10000, 11000);
}
e_dbg("ULP_CONFIG_DONE cleared after %dmsec\n", i * 10);
if (firmware_bug)
e_warn("ULP_CONFIG_DONE took %dmsec. This is a firmware bug\n", i * 10);
else
e_dbg("ULP_CONFIG_DONE cleared after %dmsec\n", i * 10);
if (force) {
mac_reg = er32(H2ME);
......
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