video: tegra: nvmap: support cache op on handles >= 4GB size

Add a new field len_msb to nvmap_cache_op struct so as to not
modify the struct's size and also support cache operations
on handles larger than 4GB. This len_msb will store the most
significant 32 bits of length.

bug 1860962

Change-Id: I75360a8531975e79329daa655575ee58525841f6
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: https://git-master/r/1509944
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/nvmap.h b/include/linux/nvmap.h
index 5ac4cdd9f..7d142ab01 100644
--- a/include/linux/nvmap.h
+++ b/include/linux/nvmap.h
@@ -284,6 +284,13 @@ struct nvmap_cache_op {
         __s32 op;               /* wb/wb_inv/inv */
 };
 
+struct nvmap_cache_op_64 {
+        unsigned long addr;     /* user pointer*/
+        __u32 handle;           /* nvmap handle */
+        __u64 len;              /* bytes to flush */
+        __s32 op;               /* wb/wb_inv/inv */
+};
+
 #ifdef CONFIG_COMPAT
 struct nvmap_cache_op_32 {
         __u32 addr;             /* user pointer*/
@@ -379,6 +386,7 @@ struct nvmap_available_heaps {
 #endif
 
 #define NVMAP_IOC_CACHE      _IOW(NVMAP_IOC_MAGIC, 12, struct nvmap_cache_op)
+#define NVMAP_IOC_CACHE_64   _IOW(NVMAP_IOC_MAGIC, 12, struct nvmap_cache_op_64)
 #ifdef CONFIG_COMPAT
 #define NVMAP_IOC_CACHE_32  _IOW(NVMAP_IOC_MAGIC, 12, struct nvmap_cache_op_32)
 #endif