Fixed MTP to work with TWRP

include/drm/drm_legacy.h

@@ -0,0 +1,203 @@
+#ifndef __DRM_DRM_LEGACY_H__
+#define __DRM_DRM_LEGACY_H__
+
+/*
+ * Legacy driver interfaces for the Direct Rendering Manager
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * Copyright (c) 2009-2010, Code Aurora Forum.
+ * All rights reserved.
+ * Copyright © 2014 Intel Corporation
+ *   Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ * Author: Rickard E. (Rik) Faith <faith@valinux.com>
+ * Author: Gareth Hughes <gareth@valinux.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.
+ */
+
+
+/*
+ * Legacy Support for palateontologic DRM drivers
+ *
+ * If you add a new driver and it uses any of these functions or structures,
+ * you're doing it terribly wrong.
+ */
+
+/**
+ * DMA buffer.
+ */
+struct drm_buf {
+	int idx;		       /**< Index into master buflist */
+	int total;		       /**< Buffer size */
+	int order;		       /**< log-base-2(total) */
+	int used;		       /**< Amount of buffer in use (for DMA) */
+	unsigned long offset;	       /**< Byte offset (used internally) */
+	void *address;		       /**< Address of buffer */
+	unsigned long bus_address;     /**< Bus address of buffer */
+	struct drm_buf *next;	       /**< Kernel-only: used for free list */
+	__volatile__ int waiting;      /**< On kernel DMA queue */
+	__volatile__ int pending;      /**< On hardware DMA queue */
+	struct drm_file *file_priv;    /**< Private of holding file descr */
+	int context;		       /**< Kernel queue for this buffer */
+	int while_locked;	       /**< Dispatch this buffer while locked */
+	enum {
+		DRM_LIST_NONE = 0,
+		DRM_LIST_FREE = 1,
+		DRM_LIST_WAIT = 2,
+		DRM_LIST_PEND = 3,
+		DRM_LIST_PRIO = 4,
+		DRM_LIST_RECLAIM = 5
+	} list;			       /**< Which list we're on */
+
+	int dev_priv_size;		 /**< Size of buffer private storage */
+	void *dev_private;		 /**< Per-buffer private storage */
+};
+
+typedef struct drm_dma_handle {
+	dma_addr_t busaddr;
+	void *vaddr;
+	size_t size;
+} drm_dma_handle_t;
+
+/**
+ * Buffer entry.  There is one of this for each buffer size order.
+ */
+struct drm_buf_entry {
+	int buf_size;			/**< size */
+	int buf_count;			/**< number of buffers */
+	struct drm_buf *buflist;		/**< buffer list */
+	int seg_count;
+	int page_order;
+	struct drm_dma_handle **seglist;
+
+	int low_mark;			/**< Low water mark */
+	int high_mark;			/**< High water mark */
+};
+
+/**
+ * DMA data.
+ */
+struct drm_device_dma {
+
+	struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];	/**< buffers, grouped by their size order */
+	int buf_count;			/**< total number of buffers */
+	struct drm_buf **buflist;		/**< Vector of pointers into drm_device_dma::bufs */
+	int seg_count;
+	int page_count;			/**< number of pages */
+	unsigned long *pagelist;	/**< page list */
+	unsigned long byte_count;
+	enum {
+		_DRM_DMA_USE_AGP = 0x01,
+		_DRM_DMA_USE_SG = 0x02,
+		_DRM_DMA_USE_FB = 0x04,
+		_DRM_DMA_USE_PCI_RO = 0x08
+	} flags;
+
+};
+
+/**
+ * Scatter-gather memory.
+ */
+struct drm_sg_mem {
+	unsigned long handle;
+	void *virtual;
+	int pages;
+	struct page **pagelist;
+	dma_addr_t *busaddr;
+};
+
+/**
+ * Kernel side of a mapping
+ */
+struct drm_local_map {
+	resource_size_t offset;	 /**< Requested physical address (0 for SAREA)*/
+	unsigned long size;	 /**< Requested physical size (bytes) */
+	enum drm_map_type type;	 /**< Type of memory to map */
+	enum drm_map_flags flags;	 /**< Flags */
+	void *handle;		 /**< User-space: "Handle" to pass to mmap() */
+				 /**< Kernel-space: kernel-virtual address */
+	int mtrr;		 /**< MTRR slot used */
+};
+
+typedef struct drm_local_map drm_local_map_t;
+
+/**
+ * Mappings list
+ */
+struct drm_map_list {
+	struct list_head head;		/**< list head */
+	struct drm_hash_item hash;
+	struct drm_local_map *map;	/**< mapping */
+	uint64_t user_token;
+	struct drm_master *master;
+};
+
+int drm_legacy_addmap(struct drm_device *d, resource_size_t offset,
+		      unsigned int size, enum drm_map_type type,
+		      enum drm_map_flags flags, struct drm_local_map **map_p);
+int drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
+int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
+struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev);
+int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma);
+
+int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req);
+int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req);
+
+/**
+ * Test that the hardware lock is held by the caller, returning otherwise.
+ *
+ * \param dev DRM device.
+ * \param filp file pointer of the caller.
+ */
+#define LOCK_TEST_WITH_RETURN( dev, _file_priv )				\
+do {										\
+	if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||	\
+	    _file_priv->master->lock.file_priv != _file_priv)	{		\
+		DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
+			   __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
+			   _file_priv->master->lock.file_priv, _file_priv);	\
+		return -EINVAL;							\
+	}									\
+} while (0)
+
+void drm_legacy_idlelock_take(struct drm_lock_data *lock);
+void drm_legacy_idlelock_release(struct drm_lock_data *lock);
+
+/* drm_pci.c dma alloc wrappers */
+void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
+
+/* drm_memory.c */
+void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
+void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
+void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
+
+static __inline__ struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
+							   unsigned int token)
+{
+	struct drm_map_list *_entry;
+	list_for_each_entry(_entry, &dev->maplist, head)
+	    if (_entry->user_token == token)
+		return _entry->map;
+	return NULL;
+}
+
+#endif /* __DRM_DRM_LEGACY_H__ */