Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 108 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
new file mode 100644
index 000000000..79d7e1a87
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* exynos_drm_gem.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Authoer: Inki Dae <inki.dae@samsung.com>
+ */
+
+#ifndef _EXYNOS_DRM_GEM_H_
+#define _EXYNOS_DRM_GEM_H_
+
+#include <drm/drm_gem.h>
+#include <linux/mm_types.h>
+
+#define to_exynos_gem(x)	container_of(x, struct exynos_drm_gem, base)
+
+#define IS_NONCONTIG_BUFFER(f)		(f & EXYNOS_BO_NONCONTIG)
+
+/*
+ * exynos drm buffer structure.
+ *
+ * @base: a gem object.
+ *	- a new handle to this gem object would be created
+ *	by drm_gem_handle_create().
+ * @flags: indicate memory type to allocated buffer and cache attruibute.
+ * @size: size requested from user, in bytes and this size is aligned
+ *	in page unit.
+ * @cookie: cookie returned by dma_alloc_attrs
+ * @kvaddr: kernel virtual address to allocated memory region (for fbdev)
+ * @dma_addr: bus address(accessed by dma) to allocated memory region.
+ *	- this address could be physical address without IOMMU and
+ *	device address with IOMMU.
+ * @dma_attrs: attrs passed dma mapping framework
+ * @sgt: Imported sg_table.
+ *
+ * P.S. this object would be transferred to user as kms_bo.handle so
+ *	user can access the buffer through kms_bo.handle.
+ */
+struct exynos_drm_gem {
+	struct drm_gem_object	base;
+	unsigned int		flags;
+	unsigned long		size;
+	void			*cookie;
+	void			*kvaddr;
+	dma_addr_t		dma_addr;
+	unsigned long		dma_attrs;
+	struct sg_table		*sgt;
+};
+
+/* destroy a buffer with gem object */
+void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem);
+
+/* create a new buffer with gem object */
+struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev,
+					     unsigned int flags,
+					     unsigned long size,
+					     bool kvmap);
+
+/*
+ * request gem object creation and buffer allocation as the size
+ * that it is calculated with framebuffer information such as width,
+ * height and bpp.
+ */
+int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
+				struct drm_file *file_priv);
+
+/* get fake-offset of gem object that can be used with mmap. */
+int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data,
+			     struct drm_file *file_priv);
+
+/*
+ * get exynos drm object from gem handle, this function could be used for
+ * other drivers such as 2d/3d acceleration drivers.
+ * with this function call, gem object reference count would be increased.
+ */
+struct exynos_drm_gem *exynos_drm_gem_get(struct drm_file *filp,
+					  unsigned int gem_handle);
+
+/*
+ * put exynos drm object acquired from exynos_drm_gem_get(),
+ * gem object reference count would be decreased.
+ */
+static inline void exynos_drm_gem_put(struct exynos_drm_gem *exynos_gem)
+{
+	drm_gem_object_put(&exynos_gem->base);
+}
+
+/* get buffer information to memory region allocated by gem. */
+int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
+				      struct drm_file *file_priv);
+
+/* free gem object. */
+void exynos_drm_gem_free_object(struct drm_gem_object *obj);
+
+/* create memory region for drm framebuffer. */
+int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
+			       struct drm_device *dev,
+			       struct drm_mode_create_dumb *args);
+
+/* low-level interface prime helpers */
+struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev,
+					    struct dma_buf *dma_buf);
+struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj);
+struct drm_gem_object *
+exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
+				     struct dma_buf_attachment *attach,
+				     struct sg_table *sgt);
+
+#endif