From c41e0deb50c44f9d119c2268f1be05e6a6bb5772 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Tue, 19 Dec 2006 12:57:24 -0800 Subject: [AGPGART] fix detection of aperture size versus GTT size on G965 On the G965, the GTT size may be larger than is required to cover the aperture. (In fact, on all hardware we've seen, the GTT is 512KB to the aperture's 256MB). A previous commit forced the aperture size to 512MB on G965 to match GTT, which would likely result in hangs at best if users tried to rely on agpgart's aperture size information. Instead, we use the resource length for the aperture size and the system's reported GTT size when available for the GTT size. Because the MSAC registers which had been read for aperture size detection on i9xx chips just cause a change in the resource size, we can use generic code for aperture detection on all i9xx. Signed-off-by: Eric Anholt Signed-off-by: Andrew Morton Signed-off-by: Dave Jones --- drivers/char/agp/agp.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/char/agp/agp.h') diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h index 8b3317fd46c9..1d59e2a5b9aa 100644 --- a/drivers/char/agp/agp.h +++ b/drivers/char/agp/agp.h @@ -225,6 +225,10 @@ struct agp_bridge_data { #define I810_GMS_DISABLE 0x00000000 #define I810_PGETBL_CTL 0x2020 #define I810_PGETBL_ENABLED 0x00000001 +#define I965_PGETBL_SIZE_MASK 0x0000000e +#define I965_PGETBL_SIZE_512KB (0 << 1) +#define I965_PGETBL_SIZE_256KB (1 << 1) +#define I965_PGETBL_SIZE_128KB (2 << 1) #define I810_DRAM_CTL 0x3000 #define I810_DRAM_ROW_0 0x00000001 #define I810_DRAM_ROW_0_SDRAM 0x00000001 -- cgit v1.2.3