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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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1
include/linux/agp_backend.h
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@ -109,6 +109,7 @@ extern int agp_unbind_memory(struct agp_memory *);
extern void agp_enable(struct agp_bridge_data *, u32);
extern struct agp_bridge_data *agp_backend_acquire(struct pci_dev *);
extern void agp_backend_release(struct agp_bridge_data *);
extern void agp_flush_chipset(struct agp_bridge_data *);
#endif /* __KERNEL__ */
#endif /* _AGP_BACKEND_H */