lkml.org 
[lkml]   [2006]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Ordering between PCI config space writes and MMIO reads?
    On Tue, Oct 31, 2006 at 11:53:02AM -0800, Roland Dreier wrote:
    > > Here's what I don't understand: according to PCI rules, pci config read
    > > can bypass pci config write (both are non-posted).
    > > So why does doing it help flush the writes as the comment claims?
    >
    > No, I don't believe a read of a config register can pass a write of
    > the same register. (Someone correct me if I'm wrong)

    I don't see anything in the PCI spec which forbids it, but I would
    expect that hardware designers don't actually do that in practice.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-10-31 21:01    [W:0.018 / U:1.192 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site