video: tegra: host: pin with specific permission

[1] Facilitate pinning of buffer with user requested access
    permission
[2] This feature allows to restrict access to buffers shared
    with the device.

Jira DLA-2502
Jira DLA-4175
Bug 3200422

Change-Id: I175ad10922480689de57eb832040a7d59b29b9bd
Signed-off-by: Arvind M <am@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2209415
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2412573
GVS: Gerrit_Virtual_Submit
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: Mitch Harwell <mharwell@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/uapi/linux/nvhost_nvdla_ioctl.h b/include/uapi/linux/nvhost_nvdla_ioctl.h
index d2cf3ea0d..3bb1a8183 100644
--- a/include/uapi/linux/nvhost_nvdla_ioctl.h
+++ b/include/uapi/linux/nvhost_nvdla_ioctl.h
@@ -52,6 +52,21 @@ struct nvdla_ping_args {
         __u32 out_response;
 };
 
+/**
+ * struct nvdla_mem_share_handle structure for sharing memory identifier
+ * and its properties
+ *
+ * @share_id            identifier of handle to be shared
+ * @offset              offset within the shared memory
+ * @access_flags        access with which memory is intended to be shared
+ * @reserved            reserved for future use
+ **/
+struct nvdla_mem_share_handle {
+        __u32 share_id;
+        __u32 offset;
+        __u32 access_flags;
+        __u32 reserved;
+};
 
 /**
  * struct nvdla_pin_unpin_args strcture args for buffer pin/unpin