agp: use scratch page on memory remove and at GATT creation V4

Convert most AGP chipset to use scratch page as default entries.
This help avoiding GPU querying 0 address and trigger computer
fault. With KMS and memory manager we bind/unbind AGP memory
constantly and it seems that some GPU are still doing AGP
traffic even after GPU report being idle with the memory segment.

Tested (radeon GPU KMS + Xorg + compiz + glxgears + quake3) on :
- SIS 1039:0001 & 1039:0003
- Intel 865 8086:2571

Compile tested for other bridges

V2 enable scratch page on uninorth
V3 fix unbound check in uninorth insert memory (Michel Dänzer)
V4 rebase on top of drm-next branch with the lastest intel AGP
   changeset (stable should use version V3 of the patch)

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 034644eeedf..d836a71bf06 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -464,6 +464,7 @@ static const struct agp_bridge_driver intel_generic_driver = {
         .aperture_sizes         = intel_generic_sizes,
         .size_type              = U16_APER_SIZE,
         .num_aperture_sizes     = 7,
+        .needs_scratch_page     = true,
         .configure              = intel_configure,
         .fetch_size             = intel_fetch_size,
         .cleanup                = intel_cleanup,
@@ -490,6 +491,7 @@ static const struct agp_bridge_driver intel_815_driver = {
         .aperture_sizes         = intel_815_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 2,
+        .needs_scratch_page     = true,
         .configure              = intel_815_configure,
         .fetch_size             = intel_815_fetch_size,
         .cleanup                = intel_8xx_cleanup,
@@ -516,6 +518,7 @@ static const struct agp_bridge_driver intel_820_driver = {
         .aperture_sizes         = intel_8xx_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 7,
+        .needs_scratch_page     = true,
         .configure              = intel_820_configure,
         .fetch_size             = intel_8xx_fetch_size,
         .cleanup                = intel_820_cleanup,
@@ -542,6 +545,7 @@ static const struct agp_bridge_driver intel_830mp_driver = {
         .aperture_sizes         = intel_830mp_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 4,
+        .needs_scratch_page     = true,
         .configure              = intel_830mp_configure,
         .fetch_size             = intel_8xx_fetch_size,
         .cleanup                = intel_8xx_cleanup,
@@ -568,6 +572,7 @@ static const struct agp_bridge_driver intel_840_driver = {
         .aperture_sizes         = intel_8xx_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 7,
+        .needs_scratch_page     = true,
         .configure              = intel_840_configure,
         .fetch_size             = intel_8xx_fetch_size,
         .cleanup                = intel_8xx_cleanup,
@@ -594,6 +599,7 @@ static const struct agp_bridge_driver intel_845_driver = {
         .aperture_sizes         = intel_8xx_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 7,
+        .needs_scratch_page     = true,
         .configure              = intel_845_configure,
         .fetch_size             = intel_8xx_fetch_size,
         .cleanup                = intel_8xx_cleanup,
@@ -620,6 +626,7 @@ static const struct agp_bridge_driver intel_850_driver = {
         .aperture_sizes         = intel_8xx_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 7,
+        .needs_scratch_page     = true,
         .configure              = intel_850_configure,
         .fetch_size             = intel_8xx_fetch_size,
         .cleanup                = intel_8xx_cleanup,
@@ -646,6 +653,7 @@ static const struct agp_bridge_driver intel_860_driver = {
         .aperture_sizes         = intel_8xx_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 7,
+        .needs_scratch_page     = true,
         .configure              = intel_860_configure,
         .fetch_size             = intel_8xx_fetch_size,
         .cleanup                = intel_8xx_cleanup,
@@ -672,6 +680,7 @@ static const struct agp_bridge_driver intel_7505_driver = {
         .aperture_sizes         = intel_8xx_sizes,
         .size_type              = U8_APER_SIZE,
         .num_aperture_sizes     = 7,
+        .needs_scratch_page     = true,
         .configure              = intel_7505_configure,
         .fetch_size             = intel_8xx_fetch_size,
         .cleanup                = intel_8xx_cleanup,