gpu: nvgpu: add vidmem allocation ioctl

Add NVGPU_GPU_IOCTL_ALLOC_VIDMEM to the ctrl fd for letting userspace
allocate on-board GPU memory (aka vidmem).  The allocations are returned
as dmabuf fds.

Also, report the amount of local video memory in the gpu
characteristics.

Jira DNVGPU-19
Jira DNVGPU-38

Change-Id: I28e361d31bb630b96d06bb1c86d022d91c7592bc
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1181152
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 04f82033..bb8cb33f 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -2148,6 +2148,7 @@ int gk20a_init_gpu_characteristics(struct gk20a *g)
         gpu->default_compute_preempt_mode =
                 g->gr.preemption_mode_rec.default_compute_preempt_mode;
 
+        gpu->local_video_memory_size = g->mm.vidmem.size;
 
         return 0;
 }