netdev - Re: 2.6.28-git8: tg3 doesn't work due to firmware not loading (-git7 is ok)

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Date:	Sun, 11 Jan 2009 19:10:36 -0500
From:	Valdis.Kletnieks@...edu
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	David Miller <davem@...emloft.net>, alessandro.suardi@...il.com,
	jaswinderlinux@...il.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: 2.6.28-git8: tg3 doesn't work due to firmware not loading (-git7 is ok)

On Sun, 11 Jan 2009 12:59:59 GMT, David Woodhouse said:
> On Sun, 2009-01-11 at 12:25 +0000, David Woodhouse wrote:
> > I'll take a look and see if I can remedy that. Then we wouldn't _need_
> > the FIRMWARE_IN_KERNEL option.
> 
> How about this? If it fails to load the firmware from userspace during
> the initialisation, it'll try again later in tg3_open(). 
> 
> I _think_ that's fine, because we don't do anything else in the early
> initialisation which requires the firmware to be loaded.
> 
> So if you build with CONFIG_TIGON3=y, CONFIG_FIRMWARE_IN_KERNEL=n, you
> should see it fail to load the firmware at boot, but then it should load
> it successfully when you bring the device up.
> 
> Untested-but-otherwise-Signed-off-by: David Woodhouse <David.Woodhouse@...el.
com>
> 
> diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c

So I took it for a test drive, using my currently-working .config, which has

CONFIG_TIGON3=y
CONFIG_FIRMWARE_IN_KERNEL=y

In the dmesg I see during early bootup:

[    0.694230] loop: module loaded
[    0.694249] tg3.c:v3.97 (December 10, 2008)
[    0.694261] vendor=8086 device=27d4
[    0.694265] tg3 0000:09:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[    0.694274] tg3 0000:09:00.0: setting latency timer to 64
[    0.696087] tg3 0000:09:00.0: wake-up capability disabled by ACPI
[    0.696094] tg3 0000:09:00.0: PME# disabled
[    0.702276] tg3 0000:09:00.0: firmware: using built-in firmware tigon/tg3_tso.bin
[    0.702287] vendor=8086 device=27d4
[    0.702288] tg3 0000:09:00.0: PCI INT A disabled
[    0.702512] console [netcon0] enabled
[    0.702515] netconsole: network logging started
[    0.702575] Driver 'sd' needs updating - please use bus_type methods

but once we get to userspace, 'ifconfig' or 'ip link show' have *zero*
about an eth0 device.

For comparison, the dmesg if I revert your patch:

[    0.696638] loop: module loaded
[    0.696658] tg3.c:v3.97 (December 10, 2008)
[    0.696670] vendor=8086 device=27d4
[    0.696674] tg3 0000:09:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[    0.696683] tg3 0000:09:00.0: setting latency timer to 64
[    0.698063] tg3 0000:09:00.0: wake-up capability disabled by ACPI
[    0.698070] tg3 0000:09:00.0: PME# disabled
[    0.704276] tg3 0000:09:00.0: firmware: using built-in firmware tigon/tg3_tso.bin
[    0.704445] eth0: Tigon3 [partno(BCM5752KFBG) rev 6002] (PCI Express) MAC address 00:15:c5:c8:33:4e
[    0.704448] eth0: attached PHY is 5752 (10/100/1000Base-T Ethernet) (WireSpeed[1])
[    0.704451] eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
[    0.704453] eth0: dma_rwctrl[76180000] dma_mask[64-bit]
[    0.704653] console [netcon0] enabled
[    0.704656] netconsole: network logging started
[    0.704718] Driver 'sd' needs updating - please use bus_type methods

So it looks like the patch is failing to finish initialization of the card.
Damned if *I* can see what's breaking it, the conversion to use a helper
function tg3_request_firmware seems sane enough....


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