Mika Kuoppala 2934368e41 drm/i915: Setup all page directories for gen8 ... If the requested size is less than what the full range of pdps can address, we end up setting pdps for only the requested area. The logical context however needs all pdp entries to be valid. Prior to commit 06fda602db ("drm/i915: Create page table allocators") we have been writing pdp entries with dma address of zero instead of valid pdps. This is supposedly bad even if those pdps are not addressed. As commit 06fda602db ("drm/i915: Create page table allocators") introduced more dynamic structure for pdps, we ended up oopsing when we populated the lrc context. Analyzing this oops revealed the fact that we have not been writing valid pdps with bsw, as it is doing the ppgtt init with 2GB limit in some cases. We should do the right thing and setup the non addressable part pdps/pde/pte to scratch page through the minimal structure by having just pdp with pde entries pointing to same page with pte entries pointing to scratch page. But instead of going through that trouble, setup all the pdps through individual pd pages and pt entries, even for non addressable parts. And let the clear range point them to scratch page. This way we populate the lrc with valid pdps and wait for dynamic page allocation work to land, and do the heavy lifting for truncating page table tree according to usage. The regression of oopsing in init was introduced by commit 06fda602db ("drm/i915: Create page table allocators") v2: Clear the range for the unused part also (Ville) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89350 Cc: Michel Thierry <michel.thierry@intel.com> Cc: Ben Widawsky <benjamin.widawsky@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Tested-by: Valtteri Rantala <valtteri.rantala@intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>		2015-03-17 22:29:58 +01:00
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drm	drm/i915: Setup all page directories for gen8	2015-03-17 22:29:58 +01:00
host1x	gpu: host1x: Provide a proper struct bus_type	2015-01-27 10:09:14 +01:00
ipu-v3	gpu: ipu-v3: do not divide by zero if the pixel clock is too large	2015-02-23 17:18:59 +01:00
vga	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 16:23:15 +02:00
Makefile	gpu: host1x: Provide a proper struct bus_type	2015-01-27 10:09:14 +01:00