linux-kernel - Re: mptsas, msi and the dl585 g2

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Date:	Thu, 09 Jul 2009 12:17:55 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	dann frazier <dannf@...com>
CC:	linux-scsi@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: mptsas, msi and the dl585 g2

dann frazier wrote:
> 
>   --------------------------------------------------------------------
>   commit 30a18d6c3f1e774de656ebd8ff219d53e2ba4029
>   Author: Yinghai Lu <Yinghai.Lu@....COM>
>   Date:   Tue Feb 19 03:21:20 2008 -0800
> 
>       x86: multi pci root bus with different io resource range, on
>       64-bit
>   --------------------------------------------------------------------
> 
> This appears to be the commit that actually introduced the issue.
> I've attached dmesg w/ PCI DEBUG enabled from both sides of this
> changeset, as well as a diff w/o printk timestamps.
> 
> Also note that #ifdef'ing out x86_pci_root_bus_res_quirks() in
> amd_bus.c seems to avoid the problem as well.

your BIOS didn't allocate io resources to some device under HT chain on node1/link2
aka under peer root bus.

Kernel try to allocate resource to them.

and the patch did right thing according to range 
bus: 40 index 1 mmio: [d9f00000, dfefffff]

YH


+bus: [00,3f] on node 0 link 1
+bus: 00 index 0 io port: [0, 2fff]
+bus: 00 index 1 mmio: [80000000, d9efffff]
+bus: 00 index 2 mmio: [dff00000, e3ffffff]
+bus: 00 index 3 mmio: [a0000, bffff]
+bus: 00 index 4 mmio: [e8000000, ffffffff]
+bus: 00 index 5 mmio: [480000000, fbffffffff]
+bus: [40,7f] on node 1 link 2
+bus: 40 index 0 io port: [3000, ffff]
+bus: 40 index 1 mmio: [d9f00000, dfefffff]
+bus: 40 index 2 mmio: [e4000000, e7ffffff]
 ACPI: bus type pci registered
 PCI: Using configuration type 1 for base access
 ACPI: EC: Look up EC in DSDT
@@ -646,18 +659,18 @@
   IO window: disabled.
   MEM window: disabled.
   PREFETCH window: disabled.
-  got res [88000000:8801ffff] bus [88000000:8801ffff] flags 27200 for BAR 6 of 0000:41:01.0
-  got res [88020000:8803ffff] bus [88020000:8803ffff] flags 27200 for BAR 6 of 0000:41:02.0
+  got res [d9f00000:d9f1ffff] bus [d9f00000:d9f1ffff] flags 27200 for BAR 6 of 0000:41:01.0
+  got res [d9f20000:d9f3ffff] bus [d9f20000:d9f3ffff] flags 27200 for BAR 6 of 0000:41:02.0
 PCI: Bridge: 0000:40:10.0
   IO window: disabled.
   MEM window: 0xda000000-0xddffffff
-  PREFETCH window: 0x0000000088000000-0x00000000880fffff
-  got res [88200000:883fffff] bus [88200000:883fffff] flags 27200 for BAR 6 of 0000:42:01.0
-  got res [88100000:8813ffff] bus [88100000:8813ffff] flags 27200 for BAR 6 of 0000:42:02.0
+  PREFETCH window: 0x00000000d9f00000-0x00000000d9ffffff
+  got res [de000000:de1fffff] bus [de000000:de1fffff] flags 27200 for BAR 6 of 0000:42:01.0
+  got res [de200000:de23ffff] bus [de200000:de23ffff] flags 27200 for BAR 6 of 0000:42:02.0
 PCI: Bridge: 0000:40:11.0
   IO window: 3000-3fff
   MEM window: 0xdfe00000-0xdfefffff
-  PREFETCH window: 0x0000000088100000-0x00000000883fffff
+  PREFETCH window: 0x00000000de000000-0x00000000de2fffff

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