tegra: Add flink helpers

Add helpers to export and import buffer objects via flink names.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
Changes in v3:
- add drm_public annotations

3 files changed, 55 insertions, 0 deletions

diff --git a/tegra/tegra-symbols.txt b/tegra/tegra-symbols.txt
index 9422696c..630e075f 100644
--- a/tegra/tegra-symbols.txt
+++ b/tegra/tegra-symbols.txt
@@ -1,6 +1,8 @@
 drm_tegra_bo_get_handle
+drm_tegra_bo_get_name
 drm_tegra_bo_map
 drm_tegra_bo_new
+drm_tegra_bo_open
 drm_tegra_bo_ref
 drm_tegra_bo_unmap
 drm_tegra_bo_unref
diff --git a/tegra/tegra.c b/tegra/tegra.c
index 5225ad05..5eb85181 100644
--- a/tegra/tegra.c
+++ b/tegra/tegra.c
@@ -244,3 +244,53 @@ drm_public int drm_tegra_bo_unmap(struct drm_tegra_bo *bo)
 
     return 0;
 }
+
+drm_public int drm_tegra_bo_get_name(struct drm_tegra_bo *bo, uint32_t *name)
+{
+    struct drm_tegra *drm = bo->drm;
+    struct drm_gem_flink args;
+    int err;
+
+    memset(&args, 0, sizeof(args));
+    args.handle = bo->handle;
+
+    err = drmIoctl(drm->fd, DRM_IOCTL_GEM_FLINK, &args);
+    if (err < 0)
+        return err;
+
+    if (name)
+        *name = args.name;
+
+    return 0;
+}
+
+drm_public int
+drm_tegra_bo_open(struct drm_tegra *drm, uint32_t name, uint32_t flags,
+                  struct drm_tegra_bo **bop)
+{
+    struct drm_gem_open args;
+    struct drm_tegra_bo *bo;
+    int err;
+
+    bo = drm_tegra_bo_alloc(drm, 0, flags, 0);
+    if (!bo)
+        return -ENOMEM;
+
+    memset(&args, 0, sizeof(args));
+    args.name = name;
+
+    err = drmIoctl(drm->fd, DRM_IOCTL_GEM_OPEN, &args);
+    if (err < 0)
+        goto free;
+
+    bo->handle = args.handle;
+    bo->size = args.size;
+
+    *bop = bo;
+
+    return 0;
+
+free:
+    free(bo);
+    return err;
+}
diff --git a/tegra/tegra.h b/tegra/tegra.h
index c6b4f984..333690f2 100644
--- a/tegra/tegra.h
+++ b/tegra/tegra.h
@@ -44,5 +44,8 @@ int drm_tegra_bo_get_handle(struct drm_tegra_bo *bo, uint32_t *handle);
 int drm_tegra_bo_map(struct drm_tegra_bo *bo, void **ptr);
 int drm_tegra_bo_unmap(struct drm_tegra_bo *bo);
 
+int drm_tegra_bo_get_name(struct drm_tegra_bo *bo, uint32_t *name);
+int drm_tegra_bo_open(struct drm_tegra *drm, uint32_t name, uint32_t flags,
+                      struct drm_tegra_bo **bop);
 
 #endif /* __DRM_TEGRA_H__ */