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    SubjectRe: [PATCH 0/2] Add iProc IDM device support
    On Mon, 9 Dec 2019 10:02:53 -0800
    Ray Jui <ray.jui@broadcom.com> wrote:

    > On 12/7/19 9:39 AM, Marc Zyngier wrote:
    > > On Mon, 2 Dec 2019 15:31:25 -0800
    > > Ray Jui <ray.jui@broadcom.com> wrote:
    > >
    > >> The Broadcom iProc IDM device allows control and monitoring of ASIC internal
    > >> bus transactions. Most importantly, it can be configured to detect bus
    > >> transaction timeout. In such case, critical information such as transaction
    > >> address that caused the error, bus master ID of the transaction that caused
    > >> the error, and etc., are made available from the IDM device.
    > >
    > > This seems to have many of the features of an EDAC device reporting
    > > uncorrectable errors.
    > >
    > > Is there any reason why it is not implemented as such?
    > >
    > > Thanks,
    > >
    > > M.
    > >
    >
    > I thought EDAC errors (in fact, in our case, that's fatal rather than
    > uncorrectable) are mostly for DDR. Is my understanding incorrect?

    No, they are for HW errors in general. There is no real limitation of
    scope, as far as I understand. Recently, the Annapurna guys came up
    with a similar HW block, and were convinced to make it an EDAC device.

    See [1] for details.

    Thanks,

    M.

    [1] https://lore.kernel.org/linux-devicetree/1570707681-865-1-git-send-email-talel@amazon.com/
    --
    Jazz is not dead. It just smells funny...

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