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| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-06-15 11:55:19 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-06-20 22:49:45 +0200 |
| commit | e87c46993e30e8fe2e7a0981a532abe8bba07e62 (patch) | |
| tree | a318dd87c8bf92ba4eba9abff1fd5a0b836722ac /drivers/char | |
| parent | bd9e8413c9bdfc36b5b8ce6ed86843d157c17099 (diff) | |
| download | linux-e87c46993e30e8fe2e7a0981a532abe8bba07e62.tar.bz2 | |
agp/intel: allow cacheable and GDFT PTEs on ValleyView
The PTE format is similar to SNB, but we don't support an MLC and don't
need chipset flushing.
Note: I have my questions whether this is right, given that MLC died
for snb & ivb, that ivb has grown a L3$ cache instead (which vlv seems
to have, too) and that the LLC bit here isn't actually LLC, but just
means 'snoop cpu caches'.
But I plan to burn this all with the heat of a thousands suns in my
gtt rework, so who cares ;-)
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Added note.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 419a25eeefd8..692610e597db 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -1183,9 +1183,17 @@ static void gen6_write_entry(dma_addr_t addr, unsigned int entry, static void valleyview_write_entry(dma_addr_t addr, unsigned int entry, unsigned int flags) { + unsigned int type_mask = flags & ~AGP_USER_CACHED_MEMORY_GFDT; + unsigned int gfdt = flags & AGP_USER_CACHED_MEMORY_GFDT; u32 pte_flags; - pte_flags = GEN6_PTE_UNCACHED | I810_PTE_VALID; + if (type_mask == AGP_USER_MEMORY) + pte_flags = GEN6_PTE_UNCACHED | I810_PTE_VALID; + else { + pte_flags = GEN6_PTE_LLC | I810_PTE_VALID; + if (gfdt) + pte_flags |= GEN6_PTE_GFDT; + } /* gen6 has bit11-4 for physical addr bit39-32 */ addr |= (addr >> 28) & 0xff0; @@ -1380,7 +1388,6 @@ static const struct intel_gtt_driver valleyview_gtt_driver = { .write_entry = valleyview_write_entry, .dma_mask_size = 40, .check_flags = gen6_check_flags, - .chipset_flush = i9xx_chipset_flush, }; /* Table to describe Intel GMCH and AGP/PCIE GART drivers. At least one of |