lkml.org 
[lkml]   [2009]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: [Linux 2.6.29-rc6] [drm:i915_set_status_page] *ERROR* can not ioremap virtual address for G33 hw status page
    Date
    On Monday 23 February 2009, Eric Anholt wrote:
    > On Mon, 2009-02-23 at 15:46 +0100, Maciej Rutecki wrote:
    > > 2.6.29-rc5 and 2.6.29-rc5-git6 work OK. In 2.6.29-rc6 XWindow (KDM)
    > > doesn't start, from dmesg:
    > >
    > > [ 18.170614] [drm] Initialized drm 1.1.0 20060810
    > > [ 18.247445] pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
    > > [ 18.247455] pci 0000:00:02.0: setting latency timer to 64
    > > [ 18.249610] mtrr: type mismatch for d0000000,10000000 old:
    > > write-back new: write-combining
    > > [ 18.249621] [drm] MTRR allocation failed
    > > [ 18.249622] . Graphics performance may suffer.
    > > [ 18.249658] pci 0000:00:02.0: irq 27 for MSI/MSI-X
    > > [ 18.249691] [drm] Initialized i915 1.6.0 20080730 on minor 0
    > > [ 18.290152] mtrr: type mismatch for d0000000,10000000 old:
    > > write-back new: write-combining
    > > [ 18.567435] set status page addr 0x00043000
    > > [ 18.567463] [drm:i915_set_status_page] *ERROR* can not ioremap
    > > virtual address for G33 hw status page
    >
    > The non-GEM G33 HWS support is wrong, and has been more or less broken
    > since inception (only now it's failing at startup instead of just being
    > slow). It's doing a mapping of the framebuffer when it should be using
    > a cached mapping of the page backing the framebuffer address.
    >
    > For a quick fix, converting to ioremap_wc will shut the kernel up and
    > get us the old ioremap behavior (whatever the MTRR said, which happens
    > to be WC).

    This is a serious regression on this particular hardware, though. We need it
    fixed before 2.6.29-final, this way or another.

    Thanks,
    Rafael


    \
     
     \ /
      Last update: 2009-02-23 22:33    [W:0.022 / U:92.432 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site