video: tegra: nvmap: implement reserve pages ioctl

On reserve request:
- mark the pages within specified range as reserved for device
On release request:
- reset the reserved bits for reserved pages within range specified
  in each handle

bug 1444151

Change-Id: Ia565bdb86db9f345004a12861138a26a9b6fc243
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: http://git-master/r/376602
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Tested-by: Krishna Reddy <vdumpa@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/nvmap.h b/include/linux/nvmap.h
index 5a3550a49..5df5867a8 100644
--- a/include/linux/nvmap.h
+++ b/include/linux/nvmap.h
@@ -308,6 +308,9 @@ struct nvmap_cache_op_list {
 /* Perform cache maintenance on a list of handles. */
 #define NVMAP_IOC_CACHE_LIST _IOW(NVMAP_IOC_MAGIC, 17,  \
                                   struct nvmap_cache_op_list)
+/* Perform reserve operation on a list of handles. */
+#define NVMAP_IOC_RESERVE _IOW(NVMAP_IOC_MAGIC, 18,     \
+                                  struct nvmap_cache_op_list)
 /* START of T124 IOCTLS */
 /* Actually allocates memory for the specified handle, with kind */
 #define NVMAP_IOC_ALLOC_KIND _IOW(NVMAP_IOC_MAGIC, 100, struct nvmap_alloc_kind_handle)