em(4) hardware error after ACPI suspend

[Sepherosa Ziehau]

On Jan 27, 2008 3:38 AM, Matthias Schmidt <matthias at dragonflybsd.org> wrote:
> He,
>
> since today I have an IBM Thinkpad T42 here.  The machine is equipped
> with a em(4) NIC and a ath(4) wireless NIC.  After testing ACPI suspend
> to RAM (state 3) which works flawlessly, I noticed some errors right
> after the resume:
>
> device_probe_and_attach: em0 attach returned 5
> em0: <Intel(R) PRO/1000 Network Connection, Version - 6.2.9> port
> 0x8000-0x803f mem 0xc0200000-0xc020ffff,0xc0220000-0xc023ffff irq 11 at
> device 1.0 on pci2
> can't re-use a leaf (debug_info)!
> can't re-use a leaf (stats)!
> can't re-use a leaf (rx_int_delay)!
> can't re-use a leaf (tx_int_delay)!
> can't re-use a leaf (rx_abs_int_delay)!
> can't re-use a leaf (tx_abs_int_delay)!
> can't re-use a leaf (int_throttle_ceil)!
> can't re-use a leaf (rxd)!
> can't re-use a leaf (txd)!
> em0: The EEPROM Checksum Is Not Valid
> em0: Unable to initialize the hardware
> device_probe_and_attach: em0 attach returned 5
>
> Why does the EEPROM checksum changes during a suspend/resume cycle?  Is
> it possible to suspend with this card?  This error also happens if I
> unload the modules right before the suspend and load it again after
> resume.

Intel does only one eeprom checksum upon em_attach() in their new
driver, but I don't think that will solve your problem; I suspect all
of the devices' BAR is complete trashed after suspend/resume.  Could
you apply following patch and post the debug prints?
http://leaf.dragonflybsd.org/~sephe/em_test.diff

The read back value should not be 0xffffffff

>
> An error also happens with the ath(4).  If I don't unload the driver,
> the card no longer gets an IP address from the DHCP server.
> Loading/Unloading etc won't help.
>
> A third error happens with USB stuff.  If I don't unload the USB module
> I see a continuously stream of the following messages:
>
> Jan 26 19:44:26 jupiter acpi: resumed at 20080126 19:44:26
> Jan 26 19:44:27 jupiter kernel: uhub0: port 1 reset failed
> Jan 26 19:44:27 jupiter kernel: uhub1: port 1 reset failed
> Jan 26 19:44:27 jupiter kernel: uhub2: port 1 reset failed
> Jan 26 19:44:28 jupiter kernel: uhub0: port 2 reset failed
> Jan 26 19:44:28 jupiter kernel: uhub1: port 2 reset failed
> Jan 26 19:44:28 jupiter kernel: uhub2: port 2 reset failed
> Jan 26 19:44:30 jupiter kernel: uhub0: port 1 reset failed
> Jan 26 19:44:30 jupiter kernel: uhub1: port 1 reset failed
> Jan 26 19:44:30 jupiter kernel: uhub2: port 1 reset failed
> [...]
>
> Only rebooting the machine helps.  Append the relevant information:
>
>
> DragonFly jupiter 1.11.0-DEVELOPMENT DragonFly 1.11.0-DEVELOPMENT #1:
> Sat Jan 26 20:05:28 CET 2008
>
> ath0 at pci2:2:0:  class=0x020000 card=0x833117ab chip=0x1014168c rev=0x01
> hdr=0x00
>     vendor   = 'Atheros Communications Inc.'
>     device   = 'AR5212 Atheros AR5212 802.11abg wireless
>
> em0 at pci2:1:0:   class=0x020000 card=0x05491014 chip=0x101e8086 rev=0x03
> hdr=0x00
>     vendor   = 'Intel Corporation'
>     device   = '82540EP Gigabit Ethernet Controller (Mobile)'



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