video: tegra: nvmap: helper for reserved bit ops

This takes care of the following
1. On page reserve request: set reserved bit to indicate page
   is reserved
2. On page unreserve request: reset the reserved bit.

Bug 1444151

Change-Id: I0920af9a8eb538a84c8b3520b383276c7a28d74b
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Signed-off-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-on: http://git-master/r/377862
(cherry picked from commit 3308000d6a3a8133e00d41ca1532f1b1e2eee0bb)
Reviewed-on: http://git-master/r/405140
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

diff --git a/drivers/video/tegra/nvmap/nvmap_mm.c b/drivers/video/tegra/nvmap/nvmap_mm.c
index 8626ffa8645019e2bd4076d430c06ac032e827f1..b05dd376f227b0fdb3f021ca039656bf358e8d97 100644 (file)
--- a/drivers/video/tegra/nvmap/nvmap_mm.c
+++ b/drivers/video/tegra/nvmap/nvmap_mm.c
@@ -183,3 +183,20 @@ void nvmap_zap_handles(struct nvmap_handle **handles, u32 *offsets,
                nvmap_zap_handle(handles[i], offsets[i], sizes[i]);
 }
 
+int nvmap_reserve_pages(struct nvmap_handle **handles, u32 *offsets, u32 *sizes,
+                       u32 nr, u32 op)
+{
+       int i;
+
+       for (i = 0; i < nr; i++) {
+               u32 size = sizes[i] ? sizes[i] : handles[i]->size;
+               u32 offset = sizes[i] ? offsets[i] : 0;
+
+               if (op == NVMAP_PAGES_RESERVE)
+                       nvmap_handle_mkreserved(handles[i], offset, size);
+               else
+                       nvmap_handle_mkunreserved(handles[i],offset, size);
+       }
+       return 0;
+}
+

diff --git a/include/linux/nvmap.h b/include/linux/nvmap.h
index 855f0074301b3e8caecc5d0465a587ee2a69a7c9..c8d94e51c314c173d21c99b7622d05b01d2c7afe 100644 (file)
--- a/include/linux/nvmap.h
+++ b/include/linux/nvmap.h
@@ -125,6 +125,11 @@ enum {
        NVMAP_CACHE_OP_WB_INV,
 };
 
+enum {
+       NVMAP_PAGES_UNRESERVE = 0,
+       NVMAP_PAGES_RESERVE
+};
+
 struct nvmap_create_handle {
        union {
                __u32 id;       /* FromId */