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    SubjectRe: [PATCH 0/2] x86: per-device dma_mapping_ops
    On Thu, 2008-05-15 at 10:12 +0900, FUJITA Tomonori wrote:
    > On Wed, 14 May 2008 08:49:24 +0300
    > Muli Ben-Yehuda <> wrote:
    > > On Tue, May 13, 2008 at 03:04:50PM +0900, FUJITA Tomonori wrote:
    > > Awesome! Much needed, thank you for doing this.
    > No problem. Well, as you know, it's just a base. We need more work to
    > solve the problems on the top of this.
    Yes thank you!
    > I'd like to have a mechanism to register a hook called when a new pci
    > (or dma capable) device is created. It enables IOMMUs to set up an
    > appropriate dma_mapping_ops per device. It could also enables us to
    > simplify the IOMMUs code to initilize devices at startup (for exmple,
    > intel-iommu checks all the pci devices and creates a domain per device
    > if necessary).
    I wanted to try and create a test version of this, at least for the
    calgary side, but ran into an error with this patch set:

    Fusion MPT SAS Host driver 3.04.06
    ACPI: PCI Interrupt 0000:34:00.0[A] -> GSI 142 (level, low) -> IRQ 142
    mptbase: ioc0: Initiating bringup
    ioc0: LSISAS1078 C1: Capabilities={Initiator}
    mptbase: ioc0: PCI-MSI enabled
    Calgary: DMA error on CalIOC2 PHB 0x33
    Calgary: 0x02000000@CSR 0x00000000@PLSSR 0xb0008000@CSMR 0x00000000@MCK
    Calgary: 0x00000000@0x810 0xfee0c000@0x820 0x00000000@0x830
    0x00000000@0x840 0x03804a00@0x850 0x00000000@0x860 0x00000000@0x870
    Calgary: 0x00000000@0xcb0
    mptbase: ioc0: Initiating recovery
    mptbase: ioc0: WARNING - Unexpected doorbell active!
    mptbase: ioc0: WARNING - NOT READY!
    mptbase: ioc0: WARNING - Cannot recover rc = -1!
    mptbase: ioc0: WARNING - Firmware Reload FAILED!
    Clocksource tsc unstable (delta = 48333779773 ns)

    Not sure what is causing this error, but will keep digging. Any ideas?


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