When I boot an APU2 using wake-on-lan and then attempt to power off with
shutdown -hp it wakes itself up again. To prevent this it is necessary to
clear the I210 PME_STATUS flag. This is described in section 5.6.2 of the
I210 datasheet:
The PE_WAKE_N remains asserted until the operating system either writes
a 1b to the PMCSR.PME_Status bit or writes a 0b to the PMCSR.PME_En bit.
In addition the WUS (wake up status) register is not automatically cleared,
as described in section 8.2.13 of the i210 datasheet:
This register is not cleared when PE_RST_N is asserted. It is only
cleared when LAN_PWR_GOOD is deasserted or when cleared by the software
device driver.
Nathanael
Index: sys/dev/pci/if_em.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_em.c,v
retrieving revision 1.344
diff -u -p -r1.344 if_em.c
--- sys/dev/pci/if_em.c 4 Feb 2020 10:59:23 -0000 1.344
+++ sys/dev/pci/if_em.c 5 Feb 2020 14:01:34 -0000
@@ -561,6 +561,9 @@ em_attach(struct device *parent, struct
#endif
printf(", address %s\n", ether_sprintf(sc->sc_ac.ac_enaddr));
+ if (sc->hw.wus)
+ printf("%s wakeup: %d\n", sc->sc_dev.dv_xname, sc->hw.wus);
+
/* Indicate SOL/IDER usage */
if (em_check_phy_reset_block(&sc->hw))
printf("%s: PHY reset is blocked due to SOL/IDER session.\n",
Index: sys/dev/pci/if_em_hw.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_em_hw.c,v
retrieving revision 1.106
diff -u -p -r1.106 if_em_hw.c
--- sys/dev/pci/if_em_hw.c 4 Feb 2020 10:59:23 -0000 1.106
+++ sys/dev/pci/if_em_hw.c 5 Feb 2020 14:01:34 -0000
@@ -1678,6 +1678,12 @@ em_init_hw(struct em_hw *hw)
ctrl = (ctrl & ~E1000_TXDCTL_WTHRESH) |
E1000_TXDCTL_FULL_TX_DESC_WB;
E1000_WRITE_REG(hw, TXDCTL(1), ctrl);
+ hw->wus = E1000_READ_REG(hw, WUS);
+ if (hw->wus)
+ E1000_WRITE_REG(hw, WUS, reg_data);
+ reg_data = E1000_READ_REG(hw, WUC);
+ if (reg_data & E1000_WUC_PME_STATUS)
+ E1000_WRITE_REG(hw, WUC, reg_data);
break;
}
Index: sys/dev/pci/if_em_hw.h
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_em_hw.h,v
retrieving revision 1.80
diff -u -p -r1.80 if_em_hw.h
--- sys/dev/pci/if_em_hw.h 4 Feb 2020 10:59:23 -0000 1.80
+++ sys/dev/pci/if_em_hw.h 5 Feb 2020 14:01:34 -0000
@@ -1482,6 +1482,7 @@ struct em_hw {
uint16_t swfw;
boolean_t eee_enable;
int sw_flag;
+ int wus;
};
#define E1000_EEPROM_SWDPIN0 0x0001 /* SWDPIN 0 EEPROM Value */
