DRM regression in Linux 2.6.9-rc1-bk12

[jhf@rivenstone.net (Joseph Fannin)]

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    Hi!

    [ I suspect dri-devel is going to bounce my mails, so I'm CC'ing
linux-kernel ]

    DRI stopped working on my setup in Linux 2.6.9-rc1-bk12.  I've
narrowed the problem down to this changeset (Drop __HAVE_CTX_BITMAP,
__HAVE_SG, __HAVE_PCI_DMA):

http://linux.bkbits.net:8080/linux-2.5/cset@413a5e3ecfrYcOqFo6JOgkPIU-qVmQ

    Backing this patch out makes DRI in -bk12 work again.

    I've verified this on two machines with PCI Radeon 7000 cards, so
there's PCIGART stuff involved; unfortunately I don't have any AGP
Radeons to test with.  (I originally suspected the __REALLY_HAVE_AGP
change, but that's fine, along with the DRIVER_FILE_FIELDS removal).

    For what it matters, I'm primarily testing on a ppc Macintosh, but
I've verified this on a PC too.

    Wow, there was no kidding about DRM being difficult to read.  :-)
I hope this is helpful, but I don't urgently need DRI working.  I'd be
glad to give any help tracking the problem down.

    On kernels with non-working DRM, I get this message from the kernel:

[drm:radeon_cp_init] *ERROR* radeon_cp_init called without lock held
[drm:radeon_unlock] *ERROR* Process 2150 using kernel context 0

    While X says:

        [24] 0  0       0x000003c0 - 0x000003df (0x20) IS[B](OprU)
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is -1, (Unknown error 999)
drmOpenDevice: open result is -1, (Unknown error 999)
drmOpenDevice: Open failed
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is -1, (Unknown error 999)
drmOpenDevice: open result is -1, (Unknown error 999)
drmOpenDevice: Open failed
drmOpenDevice: minor is 0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 7, (OK)
drmGetBusid returned ''
(II) RADEON(0): [drm] loaded kernel module for "radeon" driver
(II) RADEON(0): [drm] created "radeon" driver at busid "PCI:0:18:0"
(II) RADEON(0): [drm] added 8192 byte SAREA at 0xcd971000
(II) RADEON(0): [drm] mapped SAREA 0xcd971000 to 0xb5d89000
(II) RADEON(0): [drm] framebuffer handle = 0xd8000000
(II) RADEON(0): [drm] added 1 reserved context for kernel


(EE) RADEON(0): [pci] Out of memory (-1007)          <------- *** LOOK HERE ***


(II) RADEON(0): [drm] removed 1 reserved context for kernel
(II) RADEON(0): [drm] unmapping 8192 bytes of SAREA 0xcd971000 at
0xb5d89000
(II) RADEON(0): Memory manager initialized to (0,0) (1280,6553)
(II) RADEON(0): Reserved area from (0,1024) to (1280,1026)
(II) RADEON(0): Largest offscreen area available: 1280 x 5527
(II) RADEON(0): Using XFree86 Acceleration Architecture (XAA)

<snip>

(II) RADEON(0): Direct rendering disabled


    Thanks!

--
Joseph Fannin
jhf@rivenstone.net

"Bull in pure form is rare; there is usually some contamination by data."
    -- William Graves Perry Jr.

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