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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-06-10 14:22:59 +0530 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2016-06-13 10:03:54 +0100 |
| commit | d6473f566417a507b9ea5b0fc44ff26d930d0e5d (patch) | |
| tree | 59ddad85437028331a4496c8df8957f50f11d2e7 /drivers/char/agp | |
| parent | 4e50f79622716b444b5b07d3d1b5870fe1794e24 (diff) | |
| download | linux-d6473f566417a507b9ea5b0fc44ff26d930d0e5d.tar.bz2 | |
drm/i915: Add support for mapping an object page by page
Introduced a new vm specfic callback insert_page() to program a single pte in
ggtt or ppgtt. This allows us to map a single page in to the mappable aperture
space. This can be iterated over to access the whole object by using space as
meagre as page size.
v2: Added low level rpm assertions to insert_page routines (Chris)
v3: Added POSTING_READ post register write (Tvrtko)
v4: Rebase (Ankit)
v5: Removed wmb() and FLUSH_CTL from insert_page, caller to take care
of it (Chris)
v6: insert_page not working correctly without FLSH_CNTL write, added the
write again.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sharma@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Diffstat (limited to 'drivers/char/agp')
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index aef87fdbd187..44311296ec02 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -840,6 +840,14 @@ static bool i830_check_flags(unsigned int flags) return false; } +void intel_gtt_insert_page(dma_addr_t addr, + unsigned int pg, + unsigned int flags) +{ + intel_private.driver->write_entry(addr, pg, flags); +} +EXPORT_SYMBOL(intel_gtt_insert_page); + void intel_gtt_insert_sg_entries(struct sg_table *st, unsigned int pg_start, unsigned int flags) |