diff options
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/pci/agp_i810.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sys/dev/pci/agp_i810.c b/sys/dev/pci/agp_i810.c index 4d6f878b0ef..5b14a1162e5 100644 --- a/sys/dev/pci/agp_i810.c +++ b/sys/dev/pci/agp_i810.c @@ -60,6 +60,10 @@ /* Memory is snooped, must not be accessed through gtt from the cpu. */ #define INTEL_COHERENT 0x6 +#define GEN6_PTE_UNCACHED (1 << 1) +#define GEN6_PTE_CACHE_LLC (2 << 1) +#define GEN6_PTE_CACHE_LLC_MLC (3 << 1) + enum { CHIP_NONE = 0, /* not integrated graphics */ CHIP_I810 = 1, /* i810/i815 */ @@ -731,8 +735,16 @@ agp_i810_bind_page(void *sc, bus_addr_t offset, paddr_t physical, int flags) * COHERENT mappings mean set the snoop bit. this should never be * accessed by the gpu through the gtt. */ - if (flags & BUS_DMA_COHERENT) - physical |= INTEL_COHERENT; + switch (isc->chiptype) { + case CHIP_SANDYBRIDGE: + case CHIP_IVYBRIDGE: + physical |= GEN6_PTE_UNCACHED; + break; + default: + if (flags & BUS_DMA_COHERENT) + physical |= INTEL_COHERENT; + break; + } intagp_write_gtt(isc, offset - isc->isc_apaddr, physical); } |