[etherlab-users] e1000e driver still not working with 3.2 kernel with latest stable-1.5 branch?

Jürgen Kunz kunz at sim.tu-darmstadt.de
Tue Feb 5 09:27:18 CET 2013


Enclosed the patch for the "reset adapter" issue of the e1000e driver
for 3.2 kernel. It avoids continuously calling e1000_reset_task when
EtherCAT is used and link is down.

Regards,
Jürgen Kunz

Am 05.02.2013 07:54, schrieb Jürgen Kunz:
> Hello Gavin,
>
> thanks for the hint, I'll have a look for Florians patch and your
> post. I applied Florians "Link detection" patch for e1000e driver 3.4
> to the 3.2er driver (see attatchment), it solves the link detection
> issue here.
>
> Regards,
> Jürgen Kunz
>
> Am 05.02.2013 06:26, schrieb Gavin Lambert:
>>
>> Hi Jürgen & Daniel,
>>
>>  
>>
>> I have a fix for the first issue in my local copy of the driver (see
>> my post to the dev list on 25 October for specific details).  I have
>> seen the second issue but not chased down a fix for it yet.
>>
>>  
>>
>> Also I just noticed that Florian updated the drivers on 4 January
>> (posted in response to my message; I haven't checked whether it
>> includes the same fix or not).  I haven't had a chance to test the
>> new version myself yet but maybe it will help in your case too?
>>
>>  
>>
>> Regards,
>>
>> Gavin Lambert
>>
>>  
>>
>> *From:*etherlab-users-bounces at etherlab.org
>> [mailto:etherlab-users-bounces at etherlab.org] *On Behalf Of *Jürgen Kunz
>> *Sent:* Tuesday, 5 February 2013 18:16
>> *To:* Daniel Helmick
>> *Cc:* etherlab-users at etherlab.org
>> *Subject:* Re: [etherlab-users] e1000e driver still not working with
>> 3.2 kernel with latest stable-1.5 branch?
>>
>>  
>>
>> Hello Daniel,
>>
>> I am using this combination for a while now, with 32- and 64-bit
>> versions of the 3.2er Debian RT-Kernel. If there is a EtherCAT device
>> connected to the computer, the driver works fine.
>> There are two issues in this driver version, if there are no EtherCAT
>> devices connected. The first, the one you mentioned here, is when the
>> EtherCAT Master starts up with no device connected, then the
>> network-adapter is continously reseted until a device is connected.
>> It may hang the computer if no device is connected for a while.
>> The second issue is that when the link is plugged off, the link state
>> is not updated. Unfortunately, I did not have time yet to correct
>> these issues.
>>
>> Greetings,
>> Jürgen Kunz
>>
>> Am 05.02.2013 01:59, schrieb Daniel Helmick:
>>
>>     Has anyone else gotten this combination of driver and kernel to work?
>>
>>     Here's the /var/log/messages output when I start the ethercat master:
>>
>>     [  869.854110] EtherCAT: Master driver 1.5.1 9cdd7669dc0b
>>     [  869.854252] EtherCAT: 1 master waiting for devices.
>>     [  869.944866] e1000e 0000:04:00.0: PCI INT A disabled
>>     [  869.948134] ec_e1000e: EtherCAT-capable Intel(R) PRO/1000
>>     Network Driver - 1.5.1-k-EtherCAT
>>     [  869.948138] ec_e1000e: Copyright(c) 1999 - 2011 Intel Corporation.
>>     [  869.948202] ec_e1000e 0000:04:00.0: Disabling ASPM L0s
>>     [  869.948261] ec_e1000e 0000:04:00.0: PCI INT A -> GSI 17
>>     (level, low) -> IRQ 17
>>     [  869.948530] ec_e1000e 0000:04:00.0: setting latency timer to 64
>>     [  869.951386] ec_e1000e 0000:04:00.0: irq 65 for MSI/MSI-X
>>     [  869.951393] ec_e1000e 0000:04:00.0: irq 66 for MSI/MSI-X
>>     [  869.951397] ec_e1000e 0000:04:00.0: irq 67 for MSI/MSI-X
>>     [  870.120739] EtherCAT: Accepting 68:05:CA:10:C0:82 as main
>>     device for master 0.
>>     [  870.197588] EtherCAT 0: Starting EtherCAT-IDLE thread.
>>     [  870.197651] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     (PCI Express:2.5GT/s:Width x1) 68:05:ca:10:c0:82
>>     [  870.197656] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     Intel(R) PRO/1000 Network Connection
>>     [  870.197687] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     MAC: 3, PHY: 8, PBA No: E46981-008
>>     [  870.197825] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     Reset adapter
>>     [  872.196168] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     Reset adapter
>>     [  874.196169] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     Reset adapter
>>     [  876.196159] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     Reset adapter
>>     [  878.196162] ec_e1000e 0000:04:00.0: (unregistered net_device):
>>     Reset adapter
>>
>>
>>     And the reset adapter message occurs every 2 seconds until I stop
>>     the ethercat master.
>>
>>     Thanks,
>>     Dan
>>
>>
>>
>>     _______________________________________________
>>
>>     etherlab-users mailing list
>>
>>     etherlab-users at etherlab.org <mailto:etherlab-users at etherlab.org>
>>
>>     http://lists.etherlab.org/mailman/listinfo/etherlab-users
>>
>>  
>>
>> -- 
>> Dipl.-Inform. Jürgen Kunz
>>
>> Technische Universität Darmstadt <http://www.tu-darmstadt.de>
>> FG Simulation, Systemoptimierung und Robotik
>> <http://www.sim.tu-darmstadt.de>
>> Hochschulstr. 10
>> 64289 Darmstadt
>>
>> Tel.: ++49 (0) 6151-16-70383
>> Fax: ++49 (0) 6151-16-6648
>> E-Mail: kunz(at)sim.tu-darmstadt.de
>> Homepage: http://www.sim.tu-darmstadt.de
>>
>
> -- 
> Dipl.-Inform. Jürgen Kunz
>
> Technische Universität Darmstadt <http://www.tu-darmstadt.de>
> FG Simulation, Systemoptimierung und Robotik
> <http://www.sim.tu-darmstadt.de>
> Hochschulstr. 10
> 64289 Darmstadt
>
> Tel.: ++49 (0) 6151-16-70383
> Fax: ++49 (0) 6151-16-6648
> E-Mail: kunz(at)sim.tu-darmstadt.de
> Homepage: http://www.sim.tu-darmstadt.de
>
>
> _______________________________________________
> etherlab-users mailing list
> etherlab-users at etherlab.org
> http://lists.etherlab.org/mailman/listinfo/etherlab-users

-- 
Dipl.-Inform. Jürgen Kunz

Technische Universität Darmstadt <http://www.tu-darmstadt.de>
FG Simulation, Systemoptimierung und Robotik
<http://www.sim.tu-darmstadt.de>
Hochschulstr. 10
64289 Darmstadt

Tel.: ++49 (0) 6151-16-70383
Fax: ++49 (0) 6151-16-6648
E-Mail: kunz(at)sim.tu-darmstadt.de
Homepage: http://www.sim.tu-darmstadt.de
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diff -r 9cdd7669dc0b devices/e1000e/netdev-3.2-ethercat.c
--- a/devices/e1000e/netdev-3.2-ethercat.c	Thu Jan 10 17:36:41 2013 +0100
+++ b/devices/e1000e/netdev-3.2-ethercat.c	Tue Feb 05 09:19:10 2013 +0100
@@ -4546,9 +4544,8 @@
 
 	e1000e_update_adaptive(&adapter->hw);
 
-	if ((adapter->ecdev && !ecdev_get_link(adapter->ecdev))
-			|| (!adapter->ecdev && (!netif_carrier_ok(netdev) &&
-	    	(e1000_desc_unused(tx_ring) + 1 < tx_ring->count)))) {
+	if (!adapter->ecdev && (!netif_carrier_ok(netdev) &&
+	    	(e1000_desc_unused(tx_ring) + 1 < tx_ring->count))) {
 		/*
 		 * We've lost link, so the controller stops DMA,
 		 * but we've got queued Tx work that's never going
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