agp: add chipset flushing support to AGP interface
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>
diff --git a/drivers/char/agp/compat_ioctl.h b/drivers/char/agp/compat_ioctl.h
index 71939d6..0c9678a 100644
--- a/drivers/char/agp/compat_ioctl.h
+++ b/drivers/char/agp/compat_ioctl.h
@@ -39,6 +39,7 @@
#define AGPIOC_DEALLOCATE32 _IOW (AGPIOC_BASE, 7, compat_int_t)
#define AGPIOC_BIND32 _IOW (AGPIOC_BASE, 8, compat_uptr_t)
#define AGPIOC_UNBIND32 _IOW (AGPIOC_BASE, 9, compat_uptr_t)
+#define AGPIOC_CHIPSET_FLUSH32 _IO (AGPIOC_BASE, 10)
struct agp_info32 {
struct agp_version version; /* version of the driver */
@@ -101,5 +102,6 @@
struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type);
struct agp_memory *agp_find_mem_by_key(int key);
struct agp_client *agp_find_client_by_pid(pid_t id);
+int agpioc_chipset_flush_wrap(struct agp_file_private *priv);
#endif /* _AGP_COMPAT_H */