diff options
| author |   Keith Packard <keithp@keithp.com> | 2008-07-31 15:48:07 +1000 |
|---|---|---|
| committer |   Dave Airlie <airlied@redhat.com> | 2008-08-12 10:13:38 +1000 |
| commit | a8c84df9f71e4a7b14bdd41687a70d366c087eef (patch) | |
| tree | fc11f372de1543c6816d783ee8a852fcecf434d7 /drivers/char/agp/agp.h | |
| parent | agp: use dev_printk when possible (diff) | |
| download | linux-dev-a8c84df9f71e4a7b14bdd41687a70d366c087eef.tar.xz linux-dev-a8c84df9f71e4a7b14bdd41687a70d366c087eef.zip | |
intel/agp: rewrite GTT on resume
On my Intel chipset (965GM), the GTT is entirely erased across
suspend/resume. This patch simply re-plays the current mapping at resume
time to restore the table.=20
I noticed this once I started relying on persistent GTT mappings across VT
switch in our GEM work -- the old X server and DRM code carefully unbind
all memory from the GTT on VT switch, but GEM does not bother.
I placed the list management and rewrite code in the generic layer on the
assumption that it will be needed on other hardware, but I did not add the
rewrite call to anything other than the Intel resume function.
Keep a list of current GATT mappings. At resume time, rewrite them into
the GATT. This is needed on Intel (at least) as the entire GATT is
cleared across suspend/resume.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Keith Packard <keithp@keithp.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/char/agp/agp.h')
| -rw-r--r-- | drivers/char/agp/agp.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h index 81e14bea54bd..4bada0e8b812 100644 --- a/drivers/char/agp/agp.h +++ b/drivers/char/agp/agp.h @@ -148,6 +148,9 @@ struct agp_bridge_data { char minor_version; struct list_head list; u32 apbase_config; + /* list of agp_memory mapped to the aperture */ + struct list_head mapped_list; + spinlock_t mapped_lock; }; #define KB(x) ((x) * 1024) |