1 files changed, 31 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/bus/bus_gk20a.c b/drivers/gpu/nvgpu/common/bus/bus_gk20a.c
index 62dd7450..a2c6a3d7 100644
--- a/drivers/gpu/nvgpu/common/bus/bus_gk20a.c
+++ b/drivers/gpu/nvgpu/common/bus/bus_gk20a.c
@@ -169,3 +169,34 @@ int gk20a_bus_bar1_bind(struct gk20a *g, struct nvgpu_mem *bar1_inst)
 
         return 0;
 }
+
+u32 gk20a_bus_set_bar0_window(struct gk20a *g, struct nvgpu_mem *mem,
+                       struct nvgpu_sgt *sgt, struct nvgpu_sgl *sgl, u32 w)
+{
+        u64 bufbase = nvgpu_sgt_get_phys(g, sgt, sgl);
+        u64 addr = bufbase + w * sizeof(u32);
+        u32 hi = (u32)((addr & ~(u64)0xfffff)
+                >> bus_bar0_window_target_bar0_window_base_shift_v());
+        u32 lo = (u32)(addr & 0xfffff);
+        u32 win = nvgpu_aperture_mask(g, mem,
+                        bus_bar0_window_target_sys_mem_noncoherent_f(),
+                        bus_bar0_window_target_sys_mem_coherent_f(),
+                        bus_bar0_window_target_vid_mem_f()) |
+                bus_bar0_window_base_f(hi);
+
+        nvgpu_log(g, gpu_dbg_mem,
+                        "0x%08x:%08x begin for %p,%p at [%llx,%llx] (sz %llx)",
+                        hi, lo, mem, sgl, bufbase,
+                        bufbase + nvgpu_sgt_get_phys(g, sgt, sgl),
+                        nvgpu_sgt_get_length(sgt, sgl));
+
+        WARN_ON(!bufbase);
+
+        if (g->mm.pramin_window != win) {
+                gk20a_writel(g, bus_bar0_window_r(), win);
+                gk20a_readl(g, bus_bar0_window_r());
+                g->mm.pramin_window = win;
+        }
+
+        return lo;
+}