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agp: add chipset flushing support to AGP interface

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This bumps the AGP interface to 0.103.

Certain Intel chipsets contains a global write buffer, and this can require
flushing from the drm or X.org to make sure all data has hit RAM before
initiating a GPU transfer, due to a lack of coherency with the integrated
graphics device and this buffer.

This just adds generic support to the AGP interfaces, a follow-on patch
will add support to the Intel driver to use this interface.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2007-10-29 15:14:03 +10:00
committed by Dave Airlie
parent 9ef9dc69d4
commit a13af4b4d8
8 changed files with 29 additions and 2 deletions
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include/linux/agpgart.h
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@@ -38,6 +38,7 @@
#define AGPIOC_DEALLOCATE _IOW (AGPIOC_BASE, 7, int)
#define AGPIOC_BIND _IOW (AGPIOC_BASE, 8, struct agp_bind*)
#define AGPIOC_UNBIND _IOW (AGPIOC_BASE, 9, struct agp_unbind*)
#define AGPIOC_CHIPSET_FLUSH _IO (AGPIOC_BASE, 10)
#define AGP_DEVICE "/dev/agpgart"