From ae8faca6e2e727105f8ed485783ea25a25a425ee Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Tue, 25 Jul 2017 11:06:47 +1000 Subject: [PATCH] drm/nouveau/bar/gf100: fix access to upper half of BAR2 commit 38bcb208f60924a031b9f809f7cd252ea4a94e5f upstream. Bit 30 being set causes the upper half of BAR2 to stay in physical mode, mapped over the end of VRAM, even when the rest of the BAR has been set to virtual mode. We inherited our initial value from RM, but I'm not aware of any reason we need to keep it that way. This fixes severe GPU hang/lockup issues revealed by Wayland on F26. Shout-out to NVIDIA for the quick response with the potential cause! Signed-off-by: Ben Skeggs Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c index c794b2c..6d8f212 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c @@ -129,7 +129,7 @@ gf100_bar_init(struct nvkm_bar *base) if (bar->bar[0].mem) { addr = nvkm_memory_addr(bar->bar[0].mem) >> 12; - nvkm_wr32(device, 0x001714, 0xc0000000 | addr); + nvkm_wr32(device, 0x001714, 0x80000000 | addr); } return 0; -- 2.7.4