drm/nouveau/fb/gp100-: disable address remapper

This was causing problems on a system with a large amount of RAM, where
display push buffers were being fetched incorrectly when placed in high
system memory addresses.

While this commit will resolve the issue on that particular system, the
issue will be avoided completely with another patch to more fully solve
problems with display and large amounts of system memory on Pascal.

It's still probably a good idea to disable this to prevent weird issues
in the future.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c
index 73b5d46104bd3bfc97d8139ea640dbaa4aa3c8a6..434d2fc5bb1ce90c92c16299208ba5a290cbbe06 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/base.c
@@ -140,6 +140,9 @@ nvkm_fb_init(struct nvkm_subdev *subdev)
        if (fb->func->init)
                fb->func->init(fb);
 
+       if (fb->func->init_remapper)
+               fb->func->init_remapper(fb);
+
        if (fb->func->init_page) {
                ret = fb->func->init_page(fb);
                if (WARN_ON(ret))

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp100.c
index dffe1f5e10712e6739fcfad81f589b6bd87aa30c..8205ce436b3e847663d5d44ab35c9e13885008a4 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp100.c
@@ -36,6 +36,14 @@ gp100_fb_init_unkn(struct nvkm_fb *base)
        nvkm_wr32(device, 0x1faccc, nvkm_rd32(device, 0x100ccc));
 }
 
+void
+gp100_fb_init_remapper(struct nvkm_fb *fb)
+{
+       struct nvkm_device *device = fb->subdev.device;
+       /* Disable address remapper. */
+       nvkm_mask(device, 0x100c14, 0x00040000, 0x00000000);
+}
+
 void
 gp100_fb_init(struct nvkm_fb *base)
 {
@@ -56,6 +64,7 @@ gp100_fb = {
        .dtor = gf100_fb_dtor,
        .oneinit = gf100_fb_oneinit,
        .init = gp100_fb_init,
+       .init_remapper = gp100_fb_init_remapper,
        .init_page = gm200_fb_init_page,
        .init_unkn = gp100_fb_init_unkn,
        .ram_new = gp100_ram_new,

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp102.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp102.c
index b84b9861ef269e264e7838f308ff4a8d43545dc2..b4d74e81567447078fef479f49a722a8cd0f7cfc 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gp102.c
@@ -31,6 +31,7 @@ gp102_fb = {
        .dtor = gf100_fb_dtor,
        .oneinit = gf100_fb_oneinit,
        .init = gp100_fb_init,
+       .init_remapper = gp100_fb_init_remapper,
        .init_page = gm200_fb_init_page,
        .ram_new = gp100_ram_new,
 };

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h
index 2857f31466bff2a30d3145d6b212a067428a0500..1e4ad61c19e1a2daca5600f80e0d2949db473e83 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/priv.h
@@ -11,6 +11,7 @@ struct nvkm_fb_func {
        u32 (*tags)(struct nvkm_fb *);
        int (*oneinit)(struct nvkm_fb *);
        void (*init)(struct nvkm_fb *);
+       void (*init_remapper)(struct nvkm_fb *);
        int (*init_page)(struct nvkm_fb *);
        void (*init_unkn)(struct nvkm_fb *);
        void (*intr)(struct nvkm_fb *);
@@ -69,5 +70,6 @@ int gf100_fb_init_page(struct nvkm_fb *);
 
 int gm200_fb_init_page(struct nvkm_fb *);
 
+void gp100_fb_init_remapper(struct nvkm_fb *);
 void gp100_fb_init_unkn(struct nvkm_fb *);
 #endif