diff options
| author | Dave Airlie <airlied@linux.ie> | 2007-10-29 05:14:03 (GMT) |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2008-02-05 04:33:32 (GMT) |
| commit | a13af4b4d842da6d7065b8c73fa8f0ac58fea1b6 (patch) | |
| tree | 3269002c62ee1f10728cfa5a9782225329166d6b /drivers/char/agp/frontend.c | |
| parent | 9ef9dc69d4167276c04590d67ee55de8380bc1ad (diff) | |
| download | linux-a13af4b4d842da6d7065b8c73fa8f0ac58fea1b6.tar.xz | |
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>
Diffstat (limited to 'drivers/char/agp/frontend.c')
| -rw-r--r-- | drivers/char/agp/frontend.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c index 7791e98..9bd5a95 100644 --- a/drivers/char/agp/frontend.c +++ b/drivers/char/agp/frontend.c @@ -960,6 +960,13 @@ static int agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg) return agp_unbind_memory(memory); } +int agpioc_chipset_flush_wrap(struct agp_file_private *priv) +{ + DBG(""); + agp_flush_chipset(agp_bridge); + return 0; +} + static int agp_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { @@ -1033,6 +1040,10 @@ static int agp_ioctl(struct inode *inode, struct file *file, case AGPIOC_UNBIND: ret_val = agpioc_unbind_wrap(curr_priv, (void __user *) arg); break; + + case AGPIOC_CHIPSET_FLUSH: + ret_val = agpioc_chipset_flush_wrap(curr_priv); + break; } ioctl_out: |