samsung update 1

1 files changed, 246 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 0000000..1227ae3
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -0,0 +1,246 @@
+/* exynos_drm_gem.h
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Authoer: Inki Dae <inki.dae@samsung.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _EXYNOS_DRM_GEM_H_
+#define _EXYNOS_DRM_GEM_H_
+
+#define to_exynos_gem_obj(x)	container_of(x,\
+			struct exynos_drm_gem_obj, base)
+
+/* FIMD/HDMI/G2D/FIMC/G3D */
+#define MAX_IOMMU_NR	5
+
+#define IS_NONCONTIG_BUFFER(f)	((f & EXYNOS_BO_NONCONTIG) ||\
+					(f & EXYNOS_BO_USERPTR))
+
+struct exynos_drm_private_cb {
+	unsigned int (*get_handle)(unsigned int id);
+	int (*add_buffer)(void *obj, unsigned int *handle, unsigned int *id);
+	void (*release_buffer)(unsigned int handle);
+};
+
+/*
+ * exynos drm iommu information structure.
+ *
+ * @mapped: flag a bit of indicating whether any driver's device address
+ *	is mapped to its own iommu or not.
+ * @dma_addrs: contain device address to each device driver using iommu.
+ * @devs: device objects that requested mapping to iommu.
+ */
+struct exynos_drm_iommu_info {
+	unsigned int		mapped;
+	dma_addr_t		dma_addrs[MAX_IOMMU_NR];
+	struct device		*devs[MAX_IOMMU_NR];
+	struct list_head	*iommu_lists[MAX_IOMMU_NR];
+	/* TODO. */
+};
+
+/*
+ * exynos drm gem buffer structure.
+ *
+ * @kvaddr: kernel virtual address to allocated memory region.
+ * @dma_addr: bus address(accessed by dma) to allocated memory region.
+ *	- this address could be physical address without IOMMU and
+ *	device address with IOMMU.
+ * @write: whether pages will be written to by the caller.
+ * @sgt: sg table to transfer page data.
+ * @pages: contain all pages to allocated memory region.
+ * @page_size: could be 4K, 64K or 1MB.
+ * @size: size of allocated memory region.
+ * @shared: indicate shared mfc memory region.
+ *	(temporarily used and it should be removed later.)
+ * @shared_refcount: a reference count for this buffer being shared with others.
+ * @pfnmap: indicate whether memory region from userptr is mmaped with
+ *	VM_PFNMAP or not.
+ */
+struct exynos_drm_gem_buf {
+	struct device		*dev;
+	void __iomem		*kvaddr;
+	dma_addr_t		dma_addr;
+	unsigned int		write;
+	struct sg_table		*sgt;
+	struct page		**pages;
+	unsigned long		page_size;
+	unsigned long		size;
+	bool			shared;
+	atomic_t		shared_refcount;
+	bool			pfnmap;
+};
+
+/*
+ * exynos drm buffer structure.
+ *
+ * @base: a gem object.
+ *	- a new handle to this gem object would be created
+ *	by drm_gem_handle_create().
+ * @buffer: a pointer to exynos_drm_gem_buffer object.
+ *	- contain the information to memory region allocated
+ *	by user request or at framebuffer creation.
+ *	continuous memory region allocated by user request
+ *	or at framebuffer creation.
+ * @iommu_info: contain iommu mapping information to each device driver
+ *	using its own iommu.
+ * @size: total memory size to physically non-continuous memory region.
+ * @flags: indicate memory type to allocated buffer and cache attruibute.
+ * @priv_handle: handle to specific buffer object.
+ * @priv_id: unique id to specific buffer object.
+ *
+ * P.S. this object would be transfered to user as kms_bo.handle so
+ *	user can access the buffer through kms_bo.handle.
+ */
+struct exynos_drm_gem_obj {
+	struct drm_gem_object		base;
+	struct exynos_drm_gem_buf	*buffer;
+	struct exynos_drm_iommu_info	iommu_info;
+	unsigned long			size;
+	struct vm_area_struct		*vma;
+	unsigned int			flags;
+	void				*dma_buf_vmapping;
+	int				vmapping_count;
+	unsigned int			priv_handle;
+	unsigned int			priv_id;
+};
+
+/* register private callback. */
+void exynos_drm_priv_cb_register(struct exynos_drm_private_cb *cb);
+
+/* register a buffer object to private buffer manager. */
+int register_buf_to_priv_mgr(struct exynos_drm_gem_obj *obj,
+		unsigned int *priv_handle, unsigned int *priv_id);
+
+struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
+
+/* destroy a buffer with gem object */
+void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
+
+/* create a private gem object and initialize it. */
+struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
+						      unsigned long size);
+
+/* create a new buffer with gem object */
+struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
+						unsigned int flags,
+						unsigned long size);
+
+/*
+ * 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 dma address from gem handle and 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.
+ */
+void *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
+					unsigned int gem_handle,
+					struct drm_file *file_priv);
+
+/*
+ * put dma address from gem handle and this function could be used for
+ * other drivers such as 2d/3d acceleration drivers.
+ * with this function call, gem object reference count would be decreased.
+ */
+void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
+					unsigned int gem_handle,
+					struct drm_file *file_priv);
+
+/* get buffer offset to map to user space. */
+int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
+				    struct drm_file *file_priv);
+
+/*
+ * mmap the physically continuous memory that a gem object contains
+ * to user space.
+ */
+int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
+			      struct drm_file *file_priv);
+
+/* map user space allocated by malloc to pages. */
+int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data,
+				      struct drm_file *file_priv);
+
+/* 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);
+
+/* initialize gem object. */
+int exynos_drm_gem_init_object(struct drm_gem_object *obj);
+
+/* free gem object. */
+void exynos_drm_gem_free_object(struct drm_gem_object *gem_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);
+
+/* map memory region for drm framebuffer to user space. */
+int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
+				   struct drm_device *dev, uint32_t handle,
+				   uint64_t *offset);
+
+/*
+ * destroy memory region allocated.
+ *	- a gem handle and physical memory region pointed by a gem object
+ *	would be released by drm_gem_handle_delete().
+ */
+int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
+				struct drm_device *dev,
+				unsigned int handle);
+
+/* page fault handler and mmap fault address(virtual) to physical memory. */
+int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
+
+/* set vm_flags and we can change the vm attribute to other one at here. */
+int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+
+/* get ump sequre id for UMP. */
+int exynos_drm_gem_export_ump_ioctl(struct drm_device *dev, void *data,
+		struct drm_file *file);
+
+/* do user desired cache operation. */
+int exynos_drm_gem_cache_op_ioctl(struct drm_device *drm_dev, void *data,
+		struct drm_file *file_priv);
+
+/* temporary functions. */
+/* get physical address from a gem. */
+int exynos_drm_gem_get_phy_ioctl(struct drm_device *drm_dev, void *data,
+		struct drm_file *file_priv);
+/* import physical memory to a gem. */
+int exynos_drm_gem_phy_imp_ioctl(struct drm_device *drm_dev, void *data,
+		struct drm_file *file_priv);
+
+void exynos_drm_gem_close_object(struct drm_gem_object *obj,
+				struct drm_file *file);
+
+struct exynos_drm_gem_obj *exynos_drm_gem_get_obj(struct drm_device *dev,
+						unsigned int gem_handle,
+						struct drm_file *file_priv);
+
+#endif