gpu: nvgpu: vgpu: no support for sparse mapping

Currently sparse mapping is not supported for gp10b
in virtualized environment. Modify gpu characteristics
to reflect non-implementation of this functionality.

Also fix return value in vgpu_gp10b_locked_gmmu_map()
on error condition.

Bug 200243373

Change-Id: Ia367b923b87738a5cad0617cdb074f5a24fb1c81
Signed-off-by: Aparna Das <aparnad@nvidia.com>
Reviewed-on: http://git-master/r/1269710
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Aingara Paramakuru <aparamakuru@nvidia.com>
Reviewed-by: Sachit Kadle <skadle@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vladislav Buzov <vbuzov@nvidia.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/gp10b/vgpu_mm_gp10b.c b/drivers/gpu/nvgpu/vgpu/gp10b/vgpu_mm_gp10b.c
index 8be6b19c..66fda2d9 100644
--- a/drivers/gpu/nvgpu/vgpu/gp10b/vgpu_mm_gp10b.c
+++ b/drivers/gpu/nvgpu/vgpu/gp10b/vgpu_mm_gp10b.c
@@ -74,10 +74,10 @@ static u64 vgpu_gp10b_locked_gmmu_map(struct vm_gk20a *vm,
         /* FIXME: add support for sparse mappings */
 
         if (WARN_ON(!sgt) || WARN_ON(!g->mm.bypass_smmu))
-                return -EINVAL;
+                return 0;
 
         if (space_to_skip & (page_size - 1))
-                return -EINVAL;
+                return 0;
 
         /* Allocate (or validate when map_offset != 0) the virtual address. */
         if (!map_offset) {
@@ -182,4 +182,7 @@ void vgpu_gp10b_init_mm_ops(struct gpu_ops *gops)
 
         gops->mm.gmmu_map = vgpu_gp10b_locked_gmmu_map;
         gops->mm.init_mm_setup_hw = vgpu_gp10b_init_mm_setup_hw;
+
+        /* FIXME: add support for sparse mappings */
+        gops->mm.support_sparse = NULL;
 }