Patchwork 2.6.29-rc3: tg3 dead after resume

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Submitter Matt Carlson
Date Jan. 29, 2009, 6:42 p.m.
Message ID <20090129184215.GA13459@xw6200.broadcom.net>
Download mbox | patch
Permalink /patch/21050/
State RFC
Delegated to: David Miller
Headers show

Comments

Matt Carlson - Jan. 29, 2009, 6:42 p.m.
On Wed, Jan 28, 2009 at 05:49:18PM -0800, Parag Warudkar wrote:
> 
> 
> On Wed, 28 Jan 2009, Linus Torvalds wrote:
>  
> > For example, if we get the "dev->current_state" cache wrong, then we may 
> > not actually end up changing it when we should, because we think we 
> > already match the target state. I don't _think_ that is it, but that's the 
> > kind of thing that could happen.
> > 
> > Can you do a
> > 
> > 	lspci -vvxxx -s [tg3-device]
> > 
> > before-and-after suspend? Is there some state that looks like it got 
> > corrupted?
> 
> Sure, diff -u below. There are differences but not sure if they are 
> abnormal or expected.
> 
> Also, BTW, reverting the only tg3 specific commit - 
> commit 9e9fd12dc0679643c191fc9795a3021807e77de4
> Author: Matt Carlson <mcarlson@broadcom.com>
> Date:   Mon Jan 19 16:57:45 2009 -0800
> 
>     tg3: Fix firmware loading
> 
> did not help.
> 
> parag@parag-desktop:~$ diff -u lspci-pre-suspend lspci-post-suspend
> --- lspci-pre-suspend   2009-01-28 20:35:37.070584068 -0500
> +++ lspci-post-suspend  2009-01-28 20:36:56.922471408 -0500
> @@ -12,7 +12,7 @@
>         Capabilities: [50] Vital Product Data <?>
>         Capabilities: [58] Vendor Specific Information <?>
>         Capabilities: [e8] Message Signalled Interrupts: Mask- 64bit+ 
> Queue=0/0 Enable+
> -               Address: 00000000fee0f00c  Data: 41c9
> +               Address: 00000000fee0f00c  Data: 41d1
>         Capabilities: [d0] Express (v1) Endpoint, MSI 00
>                 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s 
> <4us, L1 unlimited
>                         ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
> @@ -36,15 +36,15 @@
>  20: 00 00 00 00 00 00 00 00 00 00 00 00 3c 10 07 13
>  30: 00 00 04 20 48 00 00 00 00 00 00 00 03 01 00 00
>  40: 00 00 00 00 00 00 00 00 01 50 03 c0 08 20 00 64
> -50: 03 58 fc 00 00 00 00 78 09 e8 78 00 7d c9 08 78
> -60: 00 00 00 00 00 00 00 00 98 02 02 a0 00 00 18 76
> -70: f2 10 00 00 c0 00 00 00 2c 00 00 00 00 00 00 00
> -80: 3c 10 07 13 00 00 00 00 34 00 13 04 82 70 08 fc
> -90: 19 be 00 01 00 00 00 b7 00 00 00 00 14 00 00 00
> -a0: 00 00 00 00 4c 01 00 00 00 00 00 00 3e 01 00 00
> -b0: 00 00 00 00 00 00 00 36 00 00 00 00 00 00 00 00
> +50: 03 58 fc 00 00 00 00 78 09 e8 78 00 7e cb 08 a8
> +60: 00 00 00 00 00 00 00 00 9a 02 02 a0 00 00 00 10
> +70: 72 10 00 00 c0 00 00 00 2c 00 00 00 00 00 00 00
> +80: 3c 10 07 13 00 00 00 00 00 00 00 00 fe 70 08 fc
> +90: 11 be 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>  c0: 00 00 00 00 00 80 00 00 0e 00 00 00 00 00 00 00
>  d0: 10 00 01 00 a0 8f 00 00 00 50 10 00 11 64 03 00
>  e0: 40 00 11 10 00 00 00 00 05 d0 81 00 0c f0 e0 fe
> -f0: 00 00 00 00 c9 41 00 00 00 00 00 00 00 00 00 00
> +f0: 00 00 00 00 d1 41 00 00 00 00 00 00 00 00 00 00

O.K.  These differences can probably be attributed to the driver's chip
reset failure.  For some reason, the driver has lost communication with
the firmware through the device's shared memory.  A cascading series of
errors will probably be the consequence.

Can you apply the following test patch and see if it helps?  The patch
does two things.  First, it enables a bit which should restore firmware
communication.  If that fixes the problem, then let me know and I'll
spin a proper patch.

In the event that it doesn't work, the patch goes on to test the memory
mapping by simply printing the register value at offset 0x0.  The value
should be the device's vendor ID and device ID.  Please post the
results so that I can verify it.



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Parag Warudkar - Jan. 29, 2009, 10:06 p.m.
On Thu, 29 Jan 2009, Matt Carlson wrote:

> Can you apply the following test patch and see if it helps?  The patch
> does two things.  First, it enables a bit which should restore firmware
> communication.  If that fixes the problem, then let me know and I'll
> spin a proper patch.
> 
> In the event that it doesn't work, the patch goes on to test the memory
> mapping by simply printing the register value at offset 0x0.  The value
> should be the device's vendor ID and device ID.  Please post the
> results so that I can verify it.
> 
> 
> diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
> index 8b3f846..39fce42 100644
> --- a/drivers/net/tg3.c
> +++ b/drivers/net/tg3.c
> @@ -7227,6 +7227,11 @@ static int tg3_init_hw(struct tg3 *tp, int reset_phy)
>  {
>  	tg3_switch_clocks(tp);
>  
> +	printk( KERN_NOTICE "%s: Reg value at offset 0x0 is 0x%x\n",
> +		tp->dev->name, tr32(0x0) );
> +
> +	tw32(MEMARB_MODE, tr32(MEMARB_MODE) | MEMARB_MODE_ENABLE);
> +
>  	tw32(TG3PCI_MEM_WIN_BASE_ADDR, 0);
>  
>  	return tg3_reset_hw(tp, reset_phy);
> 

Hi Matt,

Thanks for the patch. It didn't help with resume - but below is the 
output after patching, let me know if you need more details.

( Looks like 0xffffffff is invalid/corrupted device id /vendor id? )

[  163.856001] tg3 0000:0e:00.0: restoring config space at offset 0xc (was 0x0, writing 0x20040000)                                                                                                            
[  163.856001] tg3 0000:0e:00.0: restoring config space at offset 0x3 (was 0x0, writing 0x10)                                                                                                                  
[  163.856001] tg3 0000:0e:00.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100006)                                                                                                         

[snip]

[  164.450277] pcieport-driver 0000:1e:00.0: setting latency timer to 64
[  164.450415] pcieport-driver 0000:1e:01.0: setting latency timer to 64
[  164.450493] tg3 0000:0e:00.0: restoring config space at offset 0xc (was 0x0, writing 0x20040000)
[  164.451110] serial 00:08: activated

[snip]

[  168.913863] Restarting tasks ... done.
[  170.332953] tg3 0000:0e:00.0: wake-up capability disabled by ACPI
[  170.332960] tg3 0000:0e:00.0: PME# disabled
[  170.333047] tg3 0000:0e:00.0: irq 54 for MSI/MSI-X
[  170.333250] eth0: Reg value at offset 0x0 is 0xffffffff
[  170.394281] [drm] Loading R500 Microcode
[  170.394330] [drm] Num pipes: 1
[  171.726650] tg3: eth0: No firmware running.
[  183.119745] ADDRCONF(NETDEV_UP): eth0: link is not ready


Parag
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Matt Carlson - Jan. 29, 2009, 10:22 p.m.
On Thu, Jan 29, 2009 at 02:06:35PM -0800, Parag Warudkar wrote:
> 
> 
> On Thu, 29 Jan 2009, Matt Carlson wrote:
> 
> > Can you apply the following test patch and see if it helps?  The patch
> > does two things.  First, it enables a bit which should restore firmware
> > communication.  If that fixes the problem, then let me know and I'll
> > spin a proper patch.
> > 
> > In the event that it doesn't work, the patch goes on to test the memory
> > mapping by simply printing the register value at offset 0x0.  The value
> > should be the device's vendor ID and device ID.  Please post the
> > results so that I can verify it.
> > 
> > 
> > diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
> > index 8b3f846..39fce42 100644
> > --- a/drivers/net/tg3.c
> > +++ b/drivers/net/tg3.c
> > @@ -7227,6 +7227,11 @@ static int tg3_init_hw(struct tg3 *tp, int reset_phy)
> >  {
> >  	tg3_switch_clocks(tp);
> >  
> > +	printk( KERN_NOTICE "%s: Reg value at offset 0x0 is 0x%x\n",
> > +		tp->dev->name, tr32(0x0) );
> > +
> > +	tw32(MEMARB_MODE, tr32(MEMARB_MODE) | MEMARB_MODE_ENABLE);
> > +
> >  	tw32(TG3PCI_MEM_WIN_BASE_ADDR, 0);
> >  
> >  	return tg3_reset_hw(tp, reset_phy);
> > 
> 
> Hi Matt,
> 
> Thanks for the patch. It didn't help with resume - but below is the 
> output after patching, let me know if you need more details.
> 
> ( Looks like 0xffffffff is invalid/corrupted device id /vendor id? )
> 
> [  163.856001] tg3 0000:0e:00.0: restoring config space at offset 0xc (was 0x0, writing 0x20040000)                                                                                                            
> [  163.856001] tg3 0000:0e:00.0: restoring config space at offset 0x3 (was 0x0, writing 0x10)                                                                                                                  
> [  163.856001] tg3 0000:0e:00.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100006)                                                                                                         
> 
> [snip]
> 
> [  164.450277] pcieport-driver 0000:1e:00.0: setting latency timer to 64
> [  164.450415] pcieport-driver 0000:1e:01.0: setting latency timer to 64
> [  164.450493] tg3 0000:0e:00.0: restoring config space at offset 0xc (was 0x0, writing 0x20040000)
> [  164.451110] serial 00:08: activated
> 
> [snip]
> 
> [  168.913863] Restarting tasks ... done.
> [  170.332953] tg3 0000:0e:00.0: wake-up capability disabled by ACPI
> [  170.332960] tg3 0000:0e:00.0: PME# disabled
> [  170.333047] tg3 0000:0e:00.0: irq 54 for MSI/MSI-X
> [  170.333250] eth0: Reg value at offset 0x0 is 0xffffffff
                                           ^^^^^^^^^^^^^^^^^
So here is our problem.  For some reason the memory mapped IO is
failing.  I'll have to think about how and why that might happen.

FWIW, I can suspend and resume using the latest linux-2.6 kernel
on a machine with a similar chip here.  The problem doesn't seem to
affect all Broadcom devices.

> [  170.394281] [drm] Loading R500 Microcode
> [  170.394330] [drm] Num pipes: 1
> [  171.726650] tg3: eth0: No firmware running.
> [  183.119745] ADDRCONF(NETDEV_UP): eth0: link is not ready
> 
> 
> Parag
> 

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Parag Warudkar - Jan. 29, 2009, 10:35 p.m.
On Thu, 29 Jan 2009, Matt Carlson wrote:

> FWIW, I can suspend and resume using the latest linux-2.6 kernel
> on a machine with a similar chip here.  The problem doesn't seem to
> affect all Broadcom devices.

It is failing for me on HP xw6600 workstation, if that helps in any way.

Parag
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Rafael J. Wysocki - Jan. 29, 2009, 11:10 p.m.
On Thursday 29 January 2009, Parag Warudkar wrote:
> 
> On Thu, 29 Jan 2009, Matt Carlson wrote:
> 
> > FWIW, I can suspend and resume using the latest linux-2.6 kernel
> > on a machine with a similar chip here.  The problem doesn't seem to
> > affect all Broadcom devices.
> 
> It is failing for me on HP xw6600 workstation, if that helps in any way.

Hm, I have an xw4600 nearby, will try tomorrow.

Thanks,
Rafael
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Patch

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 8b3f846..39fce42 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -7227,6 +7227,11 @@  static int tg3_init_hw(struct tg3 *tp, int reset_phy)
 {
 	tg3_switch_clocks(tp);
 
+	printk( KERN_NOTICE "%s: Reg value at offset 0x0 is 0x%x\n",
+		tp->dev->name, tr32(0x0) );
+
+	tw32(MEMARB_MODE, tr32(MEMARB_MODE) | MEMARB_MODE_ENABLE);
+
 	tw32(TG3PCI_MEM_WIN_BASE_ADDR, 0);
 
 	return tg3_reset_hw(tp, reset_phy);