Re: More amd64 drmkms radeon

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

Taylor R Campbell wrote:
>   Date: Fri, 15 Aug 2014 16:09:03 +0100 (BST)
>   From: Robert Swindells <rjs%fdy2.co.uk@localhost>
>
>   I get a panic in a call to munmap(2) but that may just be happening when
>   the server is cleaning up from some other error.
>
>There is a bug somewhere in the establishment of VM mappings for
>radeon or ttm.  Not sure what it is yet, but it's probably in the code
>I wrote to port ttm to NetBSD, in sys/external/bsd/drm2/ttm or in the
>#ifdef NetBSD sections of
>
>sys/external/bsd/drm2/dist/drm/radeon/radeon_ttm.c
>sys/external/bsd/drm2/dist/drm/radeon/radeon_object.c
>sys/external/bsd/drm2/dist/drm/ttm

I have tried running with the calls to munmap(2) in libdrm commented
out just to see what happened, I'm not getting any panics. I realize
it doesn't solve the real problem but it makes it easier to see if
there are other things wrong.

On i386, the ioctl() of DRM_RADEON_GEM_MMAP is returning addresses
above 4GB which obviously cause drmMap() of them to fail.

Not tried amd64 yet.