gpu: nvgpu: abstract set mmu debug mode

Add new operaton g->ops.mm.set_debug_mode and let other places
that set debug mode call this callback.

It's preparing for adding vgpu set mmu debug mode hook.

JIRA VFND-1005
Bug 1594604

Change-Id: I1d227a0c0f96adb0035ae16ae1f4fbfa739bf0a7
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: http://git-master/r/833497
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vladislav Buzov <vbuzov@nvidia.com>

1 files changed, 4 insertions, 20 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ctrl_gk20a.c b/drivers/gpu/nvgpu/gk20a/ctrl_gk20a.c
index 18567064..4f33c78f 100644
--- a/drivers/gpu/nvgpu/gk20a/ctrl_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/ctrl_gk20a.c
@@ -313,33 +313,17 @@ static int nvgpu_gpu_ioctl_set_mmu_debug_mode(
                 struct gk20a *g,
                 struct nvgpu_gpu_mmu_debug_mode_args *args)
 {
-        int err = 0;
-        u32 reg_val, mmu_debug_ctrl;
-
-        err = gk20a_busy(g->dev);
-        if (err) {
+        if (gk20a_busy(g->dev)) {
                 gk20a_err(dev_from_gk20a(g), "failed to power on gpu\n");
                 return -EINVAL;
         }
 
         mutex_lock(&g->dbg_sessions_lock);
-
-        if (args->state == 1) {
-                mmu_debug_ctrl = fb_mmu_debug_ctrl_debug_enabled_f();
-                g->mmu_debug_ctrl = true;
-        } else {
-                mmu_debug_ctrl = fb_mmu_debug_ctrl_debug_disabled_f();
-                g->mmu_debug_ctrl = false;
-        }
-
-        reg_val = gk20a_readl(g, fb_mmu_debug_ctrl_r());
-        reg_val = set_field(reg_val,
-                                fb_mmu_debug_ctrl_debug_m(), mmu_debug_ctrl);
-        gk20a_writel(g, fb_mmu_debug_ctrl_r(), reg_val);
-
+        g->ops.mm.set_debug_mode(g, args->state == 1);
         mutex_unlock(&g->dbg_sessions_lock);
+
         gk20a_idle(g->dev);
-        return err;
+        return 0;
 }
 
 static int nvgpu_gpu_ioctl_set_debug_mode(