Hello,please could you add some comments about the problem or review the proposed patch?
Kernel 3.2.23 with Debian patches (Debian Wheezy, testing) Debian bug#679545 (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=679545) Machine: Dell PowerEdge 3250 (equivalent with Intel SR870BH2) Processor: 2x Itanium Madison 1.5GHz 6M Memory: 4GBIntel ICH4 (82801DB), IDE host adapter. The ata_piix module fails to initialize.
A snippet from dmesg: [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu[ 0.000000] Linux version 3.2.0-3-mckinley (Debian 3.2.23-1) (debian-kernel@xxxxxxxxxxxxxxxx) (gcc version 4.6.3 (Debian 4.6.3-8) ) #1 SMP Mon Jul 23 09:01:02 UTC 2012
... [ 0.065516] pci 0000:00:1f.1: [8086:24cb] type 0 class 0x000101 [ 0.065530] pci 0000:00:1f.1: reg 10: [io 0x0000-0x0007] [ 0.065541] pci 0000:00:1f.1: reg 14: [io 0x0000-0x0003] [ 0.065552] pci 0000:00:1f.1: reg 18: [io 0x0000-0x0007] [ 0.065563] pci 0000:00:1f.1: reg 1c: [io 0x0000-0x0003] [ 0.065574] pci 0000:00:1f.1: reg 20: [io 0x1000-0x100f] [ 0.065585] pci 0000:00:1f.1: reg 24: [mem 0x00000000-0x000003ff] ... [ 1.640965] libata version 3.00 loaded. [ 1.641656] ata_piix 0000:00:1f.1: version 2.13[ 1.641671] ata_piix 0000:00:1f.1: device not available (can't reserve [mem 0x00000000-0x000003ff])
[ 1.641747] ata_piix: probe of 0000:00:1f.1 failed with error -22 ... lspci -vvxxx reports:00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 02) (prog-if 8a [Master SecP PriP])
Subsystem: Intel Corporation Device 3404Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0 Interrupt: pin A routed to IRQ 0 Region 0: I/O ports at 01f0 [size=8] Region 1: I/O ports at 03f4 [size=1] Region 2: I/O ports at 0170 [size=8] Region 3: I/O ports at 0374 [size=1] Region 4: I/O ports at 1000 [size=16] 00: 86 80 cb 24 05 00 80 02 02 8a 01 01 00 00 00 00 10: 01 00 00 00 01 00 00 00 01 00 00 00 01 00 00 00 20: 01 10 00 00 00 00 00 00 00 00 00 00 86 80 04 34 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 40: 03 a3 00 80 00 00 00 00 01 00 02 00 00 00 00 00 50: 00 00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 60: 08 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 90: 00 00 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 00 00 00 00 00 00 00 00 00 00 00 d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f0: 00 00 00 00 00 00 00 00 60 0f 00 00 00 00 00 00 You can read in the "Intel 82801DB I/O Controller Hub 4 (ICH4)" datasheet (http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/82801db-io-controller-hub-4-datasheet.pdf) about the EXBAR register at offset 0x24 (4 bytes): "EXBAR registerThis is a memory mapped BAR that requires 1 KB of DWord-aligned memory that is Intel reserved for future functionality. BIOS needs to program the base address for a 1-KB memory space."
The dump shows that EXBAR is 0x0000, equal to the default value after reset; EFI doesn't initialize it.
ata_piix uses pcim_enable_device() which enables this along with the I/O BARs. In systems based on the Intel SR870 platform the firmware does not initialize the EXBAR and pcim_enable_device() fails because the memory region 0x0-0x3FF cannot be allocated.
The proposed patch adds ia64 arch-specific 'pci quirk' code.Since the patched Kernel doesn't see any memory resource of IDE hostadapter, it doesn't set the PCI_COMMAND_MEMORY bit in the CMD register; the EXBAR resource is *not* visible in the memeory space at all.
A snippet of the dmesg output on the patched Kernel: [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu[ 0.000000] Linux version 3.2.0-3-mckinley (Debian 3.2.23-1) (debian-kernel@xxxxxxxxxxxxxxxx) (gcc version 4.6.3 (Debian 4.6.3-8) ) #1 SMP Sun Sep 16 15:16:55 CEST 2012
... [ 0.065491] pci 0000:00:1f.1: [8086:24cb] type 0 class 0x000101 [ 0.065505] pci 0000:00:1f.1: reg 10: [io 0x0000-0x0007] [ 0.065516] pci 0000:00:1f.1: reg 14: [io 0x0000-0x0003] [ 0.065527] pci 0000:00:1f.1: reg 18: [io 0x0000-0x0007] [ 0.065537] pci 0000:00:1f.1: reg 1c: [io 0x0000-0x0003] [ 0.065548] pci 0000:00:1f.1: reg 20: [io 0x1000-0x100f] [ 0.065559] pci 0000:00:1f.1: reg 24: [mem 0x00000000-0x000003ff][ 0.065574] pci 0000:00:1f.1: SR870 EFI bug workaround; hide EXBAR memory resource.
... [ 1.391942] libata version 3.00 loaded. [ 1.392567] ata_piix 0000:00:1f.1: version 2.13 [ 1.392807] ata_piix 0000:00:1f.1: can't derive routing for PCI INT A [ 1.399383] scsi0 : ata_piix [ 1.402505] scsi1 : ata_piix [ 1.402609] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x1000 irq 34 [ 1.402658] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x1008 irq 33 [ 1.565703] ata1.00: ATAPI: HL-DT-ST DVDRAM GSA-T40N, JR03, max UDMA/33 [ 1.581571] ata1.00: configured for UDMA/33[ 1.587075] scsi 0:0:0:0: CD-ROM HL-DT-ST DVDRAM GSA-T40N JR03 PQ: 0 ANSI: 5 [ 1.598796] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[ 1.598863] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 1.599263] sr 0:0:0:0: Attached scsi CD-ROM sr0 [ 1.601972] sr 0:0:0:0: Attached scsi generic sg0 type 5 ...(Note: The patch of this posting differs slightly from the one which I have posted on Debian bug#679545 - just cosmetic improvements.)
Kind regards, Stephan Schreiber--- linux-3.2.23/arch/ia64/pci/fixup.c.orig 2012-09-16 11:23:30.000000000 +0200
+++ linux-3.2.23/arch/ia64/pci/fixup.c 2012-09-16 11:52:13.000000000 +0200 @@ -67,3 +67,40 @@ static void __devinit pci_fixup_video(st } } DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video); + + +/* + * Fixup the EFI bug of Intel's SR870 platform + *+ * The EFI of Intel's SR870BH2 and SR870BN4 including their OEM equivalents by
+ * Fujitsu and Dell doesn't initialize the memory resource of the ICH4 IDE + * hostadapter. The memory resource has the default after reset: 0x0-0x3FF.+ * The ata_piix driver uses pcim_enable_device() which attempts to enable this
+ * along with the I/O BARs and pcim_enable_device() fails because the memory
+ * region 0x0-0x3FF cannot be allocated.
+ * The memory resource is the 6th resource of the ICH4 IDE hostadapter;
+ * Intel's datasheet "Intel 82801DB I/O Controller Hub 4 (ICH4)" (Document
+ * Number: 290744-001) states in section "10.1.15 EXBAR - Expansion Base
+ * Address Register (IDE-D31:F1)" on page 389:
+ * "This is a memory mapped BAR ... that is Intel reserved for future
+ * functionality. BIOS needs to program the base address for a 1-KB memory
+ * space."
+ * Since nothing uses the EXBAR, we hide it so that only the I/O BARs will be
+ * enabled.
+ */
+
+static void __devinit pci_fixup_sr870_ich4(struct pci_dev *dev)
+{
+ struct resource *r;
+
+ r = &dev->resource[5];
+ if ((r->flags & IORESOURCE_MEM)
+ && r->start == 0 && r->end != 0) {
+ dev_info(&dev->dev,
+ "SR870 EFI bug workaround; hide EXBAR memory resource.\n");
+ r->flags = 0;
+ r->end = 0;
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_11,
+ pci_fixup_sr870_ich4);
Signed-off-by: Stephan Schreiber <info@xxxxxxxxxxxxx>
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