Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / drm / drm_gem_cma_helper.h

diff --git a/kernel/include/drm/drm_gem_cma_helper.h b/kernel/include/drm/drm_gem_cma_helper.h
new file mode 100644 (file)
index 0000000..acd6af8
--- /dev/null
+++ b/kernel/include/drm/drm_gem_cma_helper.h
@@ -0,0 +1,70 @@
+#ifndef __DRM_GEM_CMA_HELPER_H__
+#define __DRM_GEM_CMA_HELPER_H__
+
+#include <drm/drmP.h>
+#include <drm/drm_gem.h>
+
+/**
+ * struct drm_gem_cma_object - GEM object backed by CMA memory allocations
+ * @base: base GEM object
+ * @paddr: physical address of the backing memory
+ * @sgt: scatter/gather table for imported PRIME buffers
+ * @vaddr: kernel virtual address of the backing memory
+ */
+struct drm_gem_cma_object {
+       struct drm_gem_object base;
+       dma_addr_t paddr;
+       struct sg_table *sgt;
+
+       /* For objects with DMA memory allocated by GEM CMA */
+       void *vaddr;
+};
+
+static inline struct drm_gem_cma_object *
+to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
+{
+       return container_of(gem_obj, struct drm_gem_cma_object, base);
+}
+
+/* free GEM object */
+void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
+
+/* create memory region for DRM framebuffer */
+int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv,
+                                    struct drm_device *drm,
+                                    struct drm_mode_create_dumb *args);
+
+/* create memory region for DRM framebuffer */
+int drm_gem_cma_dumb_create(struct drm_file *file_priv,
+                           struct drm_device *drm,
+                           struct drm_mode_create_dumb *args);
+
+/* map memory region for DRM framebuffer to user space */
+int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
+                               struct drm_device *drm, u32 handle,
+                               u64 *offset);
+
+/* set vm_flags and we can change the VM attribute to other one at here */
+int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
+
+/* allocate physical memory */
+struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
+                                             size_t size);
+
+extern const struct vm_operations_struct drm_gem_cma_vm_ops;
+
+#ifdef CONFIG_DEBUG_FS
+void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
+#endif
+
+struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
+struct drm_gem_object *
+drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
+                                 struct dma_buf_attachment *attach,
+                                 struct sg_table *sgt);
+int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
+                          struct vm_area_struct *vma);
+void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
+void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
+
+#endif /* __DRM_GEM_CMA_HELPER_H__ */