gpu: nvgpu: Split VIDMEM support from mm_gk20a.c

Split VIDMEM support into its own code files organized as such:

  common/mm/vidmem.c     - Base vidmem support
  common/linux/vidmem.c  - Linux specific user-space interaction
  include/nvgpu/vidmem.h - Vidmem API definitions

Also use the config to enable/disable VIDMEM support in the makefile
and remove as many CONFIG_GK20A_VIDMEM preprocessor checks as possible
from the source code.

And lastly update a while-loop that iterated over an SGT to use the
new for_each construct for iterating over SGTs.

Currently this organization is not perfectly adhered to. More patches
will fix that.

JIRA NVGPU-30
JIRA NVGPU-138

Change-Id: Ic0f4d2cf38b65849c7dc350a69b175421477069c
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1540705
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/pramin.c b/drivers/gpu/nvgpu/common/pramin.c
index 4f7d6248..56179a6b 100644
--- a/drivers/gpu/nvgpu/common/pramin.c
+++ b/drivers/gpu/nvgpu/common/pramin.c
@@ -23,6 +23,7 @@
 #include <nvgpu/pramin.h>
 #include <nvgpu/page_allocator.h>
 #include <nvgpu/enabled.h>
+#include <nvgpu/vidmem.h>
 
 #include "gk20a/gk20a.h"