[Mesa-dev] [PATCH 2/5] gbm: add shared_handle(drm buffer region name)

[Zhao Halley]

---
 src/gbm/backends/dri/gbm_dri.c |   13 +++++++++++++
 src/gbm/main/gbm.c             |   18 ++++++++++++++++++
 src/gbm/main/gbm.h             |    3 +++
 src/gbm/main/gbmint.h          |    2 ++
 4 files changed, 36 insertions(+), 0 deletions(-)
 mode change 100644 => 100755 src/gbm/backends/dri/gbm_dri.c
 mode change 100644 => 100755 src/gbm/main/gbm.c
 mode change 100644 => 100755 src/gbm/main/gbm.h
 mode change 100644 => 100755 src/gbm/main/gbmint.h

diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
old mode 100644
new mode 100755
index f09f6ef..fef9d47
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -344,6 +344,18 @@ gbm_dri_to_gbm_format(uint32_t dri_format)
    return ret;
 }
 
+static union gbm_bo_handle
+gbm_dri_bo_get_shared_handle(struct gbm_bo *_bo)
+{
+   struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
+   struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
+
+   dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME,
+                          (uint32_t *) &bo->base.base.shared_handle.u32);
+
+   return bo->base.base.shared_handle;
+}
+
 static struct gbm_bo *
 gbm_dri_bo_import(struct gbm_device *gbm,
                   uint32_t type, void *buffer, uint32_t usage)
@@ -557,6 +569,7 @@ dri_device_create(int fd)
    dri->base.base.destroy = dri_destroy;
    dri->base.base.surface_create = gbm_dri_surface_create;
    dri->base.base.surface_destroy = gbm_dri_surface_destroy;
+   dri->base.base.bo_get_shared_handle = gbm_dri_bo_get_shared_handle;
 
    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
    dri->base.base.name = "drm";
diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c
old mode 100644
new mode 100755
index c58576d..317962b
--- a/src/gbm/main/gbm.c
+++ b/src/gbm/main/gbm.c
@@ -231,6 +231,24 @@ gbm_bo_get_handle(struct gbm_bo *bo)
    return bo->handle;
 }
 
+/** Get shared handle(global buffer region name) of the buffer object, 
+ * this handle can be shared among processes
+ *
+ * This is stored in the platform generic union gbm_bo_handle type. However
+ * the format of this handle is platform specific.
+ *
+ * \param bo The buffer object
+ * \return Returns the handle of the allocated buffer object
+ */
+GBM_EXPORT union gbm_bo_handle
+gbm_bo_get_shared_handle(struct gbm_bo *bo)
+{
+   if (bo->shared_handle.u32) return bo->shared_handle;
+   
+   return bo->gbm->bo_get_shared_handle(bo);
+   
+}
+
 /** Write data into the buffer object
  *
  * If the buffer object was created with the GBM_BO_USE_WRITE flag,
diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h
old mode 100644
new mode 100755
index 9d2a030..55f012a
--- a/src/gbm/main/gbm.h
+++ b/src/gbm/main/gbm.h
@@ -255,6 +255,9 @@ gbm_bo_get_device(struct gbm_bo *bo);
 union gbm_bo_handle
 gbm_bo_get_handle(struct gbm_bo *bo);
 
+union gbm_bo_handle
+gbm_bo_get_shared_handle(struct gbm_bo *bo);
+
 int
 gbm_bo_write(struct gbm_bo *bo, const void *buf, size_t count);
 
diff --git a/src/gbm/main/gbmint.h b/src/gbm/main/gbmint.h
old mode 100644
new mode 100755
index a467bea..01c55ec
--- a/src/gbm/main/gbmint.h
+++ b/src/gbm/main/gbmint.h
@@ -68,6 +68,7 @@ struct gbm_device {
                                uint32_t usage);
    struct gbm_bo *(*bo_import)(struct gbm_device *gbm, uint32_t type,
                                void *buffer, uint32_t usage);
+   union gbm_bo_handle (*bo_get_shared_handle)(struct gbm_bo *bo);
    int (*bo_write)(struct gbm_bo *bo, const void *buf, size_t data);
    void (*bo_destroy)(struct gbm_bo *bo);
 
@@ -93,6 +94,7 @@ struct gbm_bo {
    uint32_t stride;
    uint32_t format;
    union gbm_bo_handle  handle;
+   union gbm_bo_handle  shared_handle; // global handle can be shared among processes
    void *user_data;
    void (*destroy_user_data)(struct gbm_bo *, void *);
 };
-- 
1.7.5.4