linux-kernel - 2.6.27 ASPM: Pre-1.1 PCIe device detected

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Message-ID: <48F21BE9.8010405@msgid.tls.msk.ru>
Date:	Sun, 12 Oct 2008 19:46:49 +0400
From:	Michael Tokarev <mjt@....msk.ru>
To:	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: 2.6.27 ASPM: Pre-1.1 PCIe device detected - RS780 PCI to PCI bridge?

Just tried shiny-new 2.6.27 kernel on this my system,
with compiled-in ASPM support.  And become curious by
this message during bootup:

Pre-1.1 PCIe device detected, disable ASPM for 0000:00:06.0. It can be enabled forcedly with 'pcie_aspm=force'
PCI: bridge 0000:00:06.0 32bit mmio: [fea00000, feafffff]

Here's the device in question:

00:06.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 2)

Should I be concerned by this presence of "Pre-1.1 PCIe device"?
Which should not be Pre-1.1, I think...

And here's the system specs:

AMD 780G/SB700 based Asus M3A-H/HDMI motherboard,
with AMD Phenom 9750 CPU.  lspci:

00:00.0 Host bridge: Advanced Micro Devices [AMD] RS780 Host Bridge
00:01.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (int gfx)
00:06.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 2)
00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode]
00:12.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:12.1 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI1 Controller
00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:13.1 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI1 Controller
00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 3a)
00:14.1 IDE interface: ATI Technologies Inc SB700/SB800 IDE Controller
00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
00:14.5 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI2 Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h [Opteron, Athlon64, Sempron] HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h [Opteron, Athlon64, Sempron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h [Opteron, Athlon64, Sempron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h [Opteron, Athlon64, Sempron] Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h [Opteron, Athlon64, Sempron] Link Control
01:05.0 VGA compatible controller: ATI Technologies Inc Radeon HD 3200 Graphics
02:00.0 Ethernet controller: Attansic Technology Corp. L1 Gigabit Ethernet Adapter (rev b0)
03:05.0 Serial controller: NetMos Technology PCI 9845 Multi-I/O Controller (rev 01)
03:06.0 Network controller: AIRONET Wireless Communications PC4800 (rev 01)
03:07.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10)

Thanks!

/mjt
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