gpu: nvgpu: Removal of regops from CUDA driver

The current CUDA drivers have been using the regops to
directly accessing the GPU registers from user space through
the dbg node. This is a security hole and needs to be avoided.
The patch alternatively implements the similar functionality
in the kernel and provide an ioctl for it.

Bug 200083334

Change-Id: Ic5ff5a215cbabe7a46837bc4e15efcceb0df0367
Signed-off-by: sujeet baranwal <sbaranwal@nvidia.com>
Reviewed-on: http://git-master/r/711758
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/hw_fb_gm20b.h b/drivers/gpu/nvgpu/gm20b/hw_fb_gm20b.h
index a753074e..214306cb 100644
--- a/drivers/gpu/nvgpu/gm20b/hw_fb_gm20b.h
+++ b/drivers/gpu/nvgpu/gm20b/hw_fb_gm20b.h
@@ -214,10 +214,18 @@ static inline u32 fb_mmu_debug_ctrl_debug_v(u32 r)
 {
         return (r >> 16) & 0x1;
 }
+static inline u32 fb_mmu_debug_ctrl_debug_m(void)
+{
+        return 0x1 << 16;
+}
 static inline u32 fb_mmu_debug_ctrl_debug_enabled_v(void)
 {
         return 0x00000001;
 }
+static inline u32 fb_mmu_debug_ctrl_debug_disabled_v(void)
+{
+        return 0x00000000;
+}
 static inline u32 fb_mmu_vpr_info_r(void)
 {
         return 0x00100cd0;