drm/nouveau/gr/gf100-: virtualise init_gpc_mmu + apply fixes from traces

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

drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c

@@ -1920,7 +1920,7 @@ gf100_gr_init_gpc_mmu(struct gf100_gr *gr)
 	struct nvkm_fb *fb = device->fb;
 
 	nvkm_wr32(device, 0x418880, nvkm_rd32(device, 0x100c80) & 0x00000001);
-	nvkm_wr32(device, 0x4188a4, 0x00000000);
+	nvkm_wr32(device, 0x4188a4, 0x03000000);
 	nvkm_wr32(device, 0x418888, 0x00000000);
 	nvkm_wr32(device, 0x41888c, 0x00000000);
 	nvkm_wr32(device, 0x418890, 0x00000000);

drivers/gpu/drm/nouveau/nvkm/engine/gr/gm107.c

@@ -308,22 +308,30 @@ gm107_gr_init_bios(struct gf100_gr *gr)
 	}
 }
 
+static void
+gm107_gr_init_gpc_mmu(struct gf100_gr *gr)
+{
+	struct nvkm_device *device = gr->base.engine.subdev.device;
+	struct nvkm_fb *fb = device->fb;
+
+	nvkm_wr32(device, GPC_BCAST(0x0880), 0x00000000);
+	nvkm_wr32(device, GPC_BCAST(0x0890), 0x00000000);
+	nvkm_wr32(device, GPC_BCAST(0x0894), 0x00000000);
+	nvkm_wr32(device, GPC_BCAST(0x08b4), nvkm_memory_addr(fb->mmu_wr) >> 8);
+	nvkm_wr32(device, GPC_BCAST(0x08b8), nvkm_memory_addr(fb->mmu_rd) >> 8);
+}
+
 static int
 gm107_gr_init(struct gf100_gr *gr)
 {
 	struct nvkm_device *device = gr->base.engine.subdev.device;
-	struct nvkm_fb *fb = device->fb;
 	const u32 magicgpc918 = DIV_ROUND_UP(0x00800000, gr->tpc_total);
 	u32 data[TPC_MAX / 8] = {};
 	u8  tpcnr[GPC_MAX];
 	int gpc, tpc, rop;
 	int i;
 
-	nvkm_wr32(device, GPC_BCAST(0x0880), 0x00000000);
-	nvkm_wr32(device, GPC_BCAST(0x0890), 0x00000000);
-	nvkm_wr32(device, GPC_BCAST(0x0894), 0x00000000);
-	nvkm_wr32(device, GPC_BCAST(0x08b4), nvkm_memory_addr(fb->mmu_wr) >> 8);
-	nvkm_wr32(device, GPC_BCAST(0x08b8), nvkm_memory_addr(fb->mmu_rd) >> 8);
+	gr->func->init_gpc_mmu(gr);
 
 	gf100_gr_mmio(gr, gr->func->mmio);
 
@@ -442,6 +450,7 @@ gm107_gr_gpccs_ucode = {
 static const struct gf100_gr_func
 gm107_gr = {
 	.init = gm107_gr_init,
+	.init_gpc_mmu = gm107_gr_init_gpc_mmu,
 	.init_rop_active_fbps = gk104_gr_init_rop_active_fbps,
 	.init_ppc_exceptions = gk104_gr_init_ppc_exceptions,
 	.mmio = gm107_gr_pack_mmio,