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    SubjectRe: mpc8315e-rdb: pci_enable_msi() fails (using today's galak/powerpc.git tree)
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    Hello,

    On Sat, May 23, 2009 at 10:58 PM, Leon Woestenberg
    <leon.woestenberg@gmail.com> wrote:
    > using this tree: git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc.git
    >
    > pci_enable_msi() fails on my MPC8315E-RDB board with PCIe device in

    I found that the DTS for the MPC8315E-RDB is missing the msi bits. I
    added these, converted from the BSP (in old non-hex format):

    ipic-msi@7c0 {
    compatible = "fsl,ipic-msi";
    reg = <0x7c0 0x40>;
    msi-available-ranges = <0 0x100>;
    interrupts = < 0x43 8
    0x4 8
    0x51 8
    0x52 8
    0x56 8
    0x57 8
    0x58 8
    0x59 8 >;
    interrupt-parent = < &ipic >;
    };



    Now the MSI stuff gets set-up, pci_enable_msi() does not fault. My
    interrupt handler is still not called though.

    Partial log below:

    [ 246.907366] Setting up Freescale MSI support
    [ 247.858192] irq: irq 67 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 67
    [ 249.323654] irq: irq 4 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 21
    [ 250.779210] irq: irq 81 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 81
    [ 252.244662] irq: irq 82 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 82
    [ 253.710192] irq: irq 86 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 86
    [ 255.175651] irq: irq 87 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 87
    [ 256.641100] irq: irq 88 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 88
    [ 258.106549] irq: irq 89 on host
    /immr@e0000000/interrupt-controller@700 mapped to virtual irq 89

    [ 309.396138] pci_enable_msi()
    [ 309.399735] irq: irq 0 on host /immr@e0000000/ipic-msi@7c0 mapped
    to virtual irq 24
    [ 309.408030] fsl_compose_msi_msg: allocated srs: 0, ibs: 0
    [ 309.414160] Enabled MSI interrupting.
    [ 309.418449] pci_read_config_byte(..., PCI_REVISION_ID, ...)
    [ 309.424754] Board revision: 0x01.
    [ 309.428690] pci_request_regions()
    [ 309.432654] pci_set_dma_mask()
    [ 309.436337] Using a 64-bit DMA mask.
    [ 309.455605] request_irq()
    [ 309.458925] Succesfully requested IRQ #24 with dev_id 0xc71c5440

    debugfs shows:

    virq hwirq chip name host name
    17 0x00009 IPIC /immr@e0000000/interrupt-controller@700
    22 0x00010 IPIC /immr@e0000000/interrupt-controller@700
    23 0x0000e IPIC /immr@e0000000/interrupt-controller@700
    24 0x00000 FSL-MSI /immr@e0000000/ipic-msi@7c0
    32 0x00020 IPIC /immr@e0000000/interrupt-controller@700
    33 0x00021 IPIC /immr@e0000000/interrupt-controller@700
    34 0x00022 IPIC /immr@e0000000/interrupt-controller@700
    35 0x00023 IPIC /immr@e0000000/interrupt-controller@700
    36 0x00024 IPIC /immr@e0000000/interrupt-controller@700
    37 0x00025 IPIC /immr@e0000000/interrupt-controller@700
    38 0x00026 IPIC /immr@e0000000/interrupt-controller@700

    Regards, Leon.


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