treff: Re: [BUG/RFC/PATCH] drm: Fix for non-coherent DMA PowerPC
> On Mon, 2008-03-03 at 20:51 +0100, Gerhard Pircher wrote:
> > > Remove the GFP_HIGHMEM from the above. It looks like our cache
> > > flushing isn't going to work for highmem, it would need some
> > >
On Mon, 2008-03-03 at 20:51 +0100, Gerhard Pircher wrote:
> > Remove the GFP_HIGHMEM from the above. It looks like our cache
> > flushing isn't going to work for highmem, it would need some
> > kmap's for that.
> Yes, it looks like this was the problem. No kernel oops anymore.
> The machine locks
treff: Re: [BUG/RFC/PATCH] drm: Fix for non-coherent DMA PowerPC
> Bah, I think I found the problem:
>
> +static inline void *drm_vmalloc_dma(unsigned long size)
> +{
> +#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
> +
Bah, I think I found the problem:
+static inline void *drm_vmalloc_dma(unsigned long size)
+{
+#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
+ return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM,
+PAGE_KERNEL | _PAGE_NO_CACHE);
+#else
+ return vma
> Okay, I changed the code to this:
>
> >DRM_DEBUG("dev = 0x%x, bus_address = 0x%x, bus_to_virt = 0x%lx, max_pages =
> >0x%x\n",
> > (unsigned int)&dev->pdev->dev, bus_address,
> > (unsigned long)virt_to_bus(bus_address), max_pages);
> >
> >if (gart_info->gart_table_location == DRM_ATI_G
> Xorg (v7.1.1, Debian Etch) crashes with this patch (applied to 2.6.25-rc3)
> on my AmigaOne with a Radeon 9200 (PCIGART mode enabled). See the attached
> log file for the stack trace.
That doesn't look possible, which is weird... looks like we are passing
0 to clean_dcache_range().
Interesting
