http://bugzilla.kernel.org/show_bug.cgi?id=12441
------- Comment #8 from palgl...@gmail.com 2009-01-28 02:39 ------- Created an attachment (id=20028) --> (http://bugzilla.kernel.org/attachment.cgi?id=20028&action=view) two approach to fix >[ 313.061972] [drm:radeon_do_init_cp] *ERROR* could not find ioremap agp This fail is happened in ioremap() due to type mismatch. ioremap() will be translated to nocache_ioremap() on x86/64 default. >Xorg:3993 map pfn expected mapping type write-back for >c0000000-c0101000, got write-combining This indicates that trying to maping with write-back(=nocache), but region is write-combine, be as explained in above. On the calling io_remap_pfn_range() from drm_mmap_locked() via mmap() in drm_vm.c, vma->vm_page_prot=0, it indicates do mapping with regions original prot. Thus, with most AGP mtrr system, it is setted to write-combine. there are two approach, In drm_mmap_locked(), use nocache mapping with agp too. or In drm_core_ioremap(), try to use ioremap_wc(). (i'm sure best with ioremap_default() behaviour, but it not exported yet and it's in only x86.) BTW I still got >[10503.406254] glxinfo:5854 freeing invalid memtype e0102000-e0112000 on exit some apps that using drm. with my print debug, strangely, first cp_ring is only succeed the ioremap(). >[drm:radeon_do_init_cp] *ERROR* cp_ring:f8900000, ring_rptr:(null), >agp_buffer_map:(null) Because PAT has UC- type for few GART region already immediate after boot. There may be something wrong PAT and MTRR interactions, and AGP madness. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
