linux-kernel - RE: 2.6.24.X: SATA/AHCI related boot delay.

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Date:	Tue, 15 Apr 2008 20:57:08 +0800
From:	"Peer Chen" <pchen@...dia.com>
To:	"Volker Armin Hemmann" <volker.armin.hemmann@...clausthal.de>
Cc:	"Jeff Garzik" <jeff@...zik.org>, "Tejun Heo" <htejun@...il.com>,
	<linux-kernel@...r.kernel.org>, <linux-ide@...r.kernel.org>,
	"Kuan Luo" <kluo@...dia.com>
Subject: RE: 2.6.24.X: SATA/AHCI related boot delay. - not with 2.6.24.3


Yes, could you dump the IO port data from 0x2f00 to 0x2fff and send it to me, it record the base address BIOS trap?
Also, could you update the latest BIOS to try this issue again?

BRs
Peer Chen

-----Original Message-----
From: Volker Armin Hemmann [mailto:volker.armin.hemmann@...clausthal.de] 
Sent: Tuesday, April 15, 2008 5:13 AM
To: Peer Chen
Cc: Jeff Garzik; Tejun Heo; linux-kernel@...r.kernel.org; linux-ide@...r.kernel.org; Kuan Luo
Subject: Re: 2.6.24.X: SATA/AHCI related boot delay. - not with 2.6.24.3

Hi,

On Montag, 14. April 2008, Peer Chen wrote:
> Volker,
> I mean add msleep(x) function between writel(HOST_AHCI_EN, mmio + HOST_CTL)
> and readl(mmio + HOST_CTL) cause we ever met a bug that writing data to the
> AHCI BAR5 but need a delay to get correct read back value. But forget it,
> looks like it's not the same case here. Which mode do you set(ahci or
> non-raid) when you encountered the issue that the AHCI_EN bit failed to
> set? I found we have workaround for AHCI_EN bit setting in our Bios
> programming guide for AHCI mode.

you mean this?

[    0.363828] ------------[ cut here ]------------
[    0.363828] WARNING: at drivers/ata/ahci.c:645 ahci_init_one+0x190/0xa3a()
[    0.363828] Modules linked in:
[    0.363828] Pid: 1, comm: swapper Not tainted 2.6.25-rc8 #2
[    0.363828]
[    0.363828] Call Trace:
[    0.363828]  [<ffffffff8022c5a5>] warn_on_slowpath+0x51/0x63
[    0.363832]  [<ffffffff80220061>] __ioremap+0x8/0x197
[    0.363872]  [<ffffffff803921f4>] pci_conf1_read+0xb2/0xbd
[    0.363911]  [<ffffffff802f3316>] pcim_iomap_release+0x0/0x2c
[    0.363950]  [<ffffffff802f3316>] pcim_iomap_release+0x0/0x2c
[    0.363989]  [<ffffffff803471a9>] devres_find+0x4b/0x65
[    0.364028]  [<ffffffff8036e4cd>] ahci_init_one+0x190/0xa3a
[    0.364067]  [<ffffffff802af837>] sysfs_addrm_finish+0x1d/0x209
[    0.364107]  [<ffffffff80284014>] ifind+0x34/0x8d
[    0.364145]  [<ffffffff802af54e>] sysfs_find_dirent+0x1b/0x2f
[    0.364184]  [<ffffffff802eb75d>] ida_get_new_above+0xf0/0x180
[    0.364223]  [<ffffffff802af837>] sysfs_addrm_finish+0x1d/0x209
[    0.364263]  [<ffffffff802b0378>] sysfs_create_link+0xb6/0x102
[    0.364303]  [<ffffffff802f8664>] pci_device_probe+0x4c/0x72
[    0.364342]  [<ffffffff80344c48>] driver_probe_device+0xb5/0x132
[    0.364381]  [<ffffffff80344ddb>] __driver_attach+0x6f/0xaf
[    0.364419]  [<ffffffff80344d6c>] __driver_attach+0x0/0xaf
[    0.364458]  [<ffffffff80344d6c>] __driver_attach+0x0/0xaf
[    0.364498]  [<ffffffff8034400a>] bus_for_each_dev+0x44/0x6f
[    0.364538]  [<ffffffff802a9b57>] proc_match+0x23/0x2d
[    0.364576]  [<ffffffff80344876>] bus_add_driver+0xae/0x1f4
[    0.364614]  [<ffffffff8034500a>] driver_register+0x59/0xce
[    0.364654]  [<ffffffff802f88a5>] __pci_register_driver+0x4a/0x7d
[    0.364701]  [<ffffffff804e56b8>] kernel_init+0x14f/0x2b9
[    0.364740]  [<ffffffff8020be98>] child_rip+0xa/0x12
[    0.364779]  [<ffffffff804e5569>] kernel_init+0x0/0x2b9
[    0.364817]  [<ffffffff8020be8e>] child_rip+0x0/0x12
[    0.364854]
[    0.364891] ---[ end trace ea9d541113ecaf1e ]---

this happened with AHCI mode set in bios, pci=nomsi as kernel boot parameter 
and kernel 2.6.25-rc8.

Something similar looking happened without pci=nomsi, but in that case I could 
not scroll back to even make a picture because of the kernel panic (rootfs 
not found).

Glück Auf
Volker
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