• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 #ifndef __DRM_DRM_LEGACY_H__
2 #define __DRM_DRM_LEGACY_H__
3 /*
4  * Legacy driver interfaces for the Direct Rendering Manager
5  *
6  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
7  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
8  * Copyright (c) 2009-2010, Code Aurora Forum.
9  * All rights reserved.
10  * Copyright © 2014 Intel Corporation
11  *   Daniel Vetter <daniel.vetter@ffwll.ch>
12  *
13  * Author: Rickard E. (Rik) Faith <faith@valinux.com>
14  * Author: Gareth Hughes <gareth@valinux.com>
15  *
16  * Permission is hereby granted, free of charge, to any person obtaining a
17  * copy of this software and associated documentation files (the "Software"),
18  * to deal in the Software without restriction, including without limitation
19  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20  * and/or sell copies of the Software, and to permit persons to whom the
21  * Software is furnished to do so, subject to the following conditions:
22  *
23  * The above copyright notice and this permission notice (including the next
24  * paragraph) shall be included in all copies or substantial portions of the
25  * Software.
26  *
27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
30  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33  * OTHER DEALINGS IN THE SOFTWARE.
34  */
35 
36 #include <drm/drm.h>
37 #include <drm/drm_auth.h>
38 #include <drm/drm_hashtab.h>
39 
40 struct drm_device;
41 struct file;
42 
43 /*
44  * Legacy Support for palateontologic DRM drivers
45  *
46  * If you add a new driver and it uses any of these functions or structures,
47  * you're doing it terribly wrong.
48  */
49 
50 /**
51  * DMA buffer.
52  */
53 struct drm_buf {
54 	int idx;		       /**< Index into master buflist */
55 	int total;		       /**< Buffer size */
56 	int order;		       /**< log-base-2(total) */
57 	int used;		       /**< Amount of buffer in use (for DMA) */
58 	unsigned long offset;	       /**< Byte offset (used internally) */
59 	void *address;		       /**< Address of buffer */
60 	unsigned long bus_address;     /**< Bus address of buffer */
61 	struct drm_buf *next;	       /**< Kernel-only: used for free list */
62 	__volatile__ int waiting;      /**< On kernel DMA queue */
63 	__volatile__ int pending;      /**< On hardware DMA queue */
64 	struct drm_file *file_priv;    /**< Private of holding file descr */
65 	int context;		       /**< Kernel queue for this buffer */
66 	int while_locked;	       /**< Dispatch this buffer while locked */
67 	enum {
68 		DRM_LIST_NONE = 0,
69 		DRM_LIST_FREE = 1,
70 		DRM_LIST_WAIT = 2,
71 		DRM_LIST_PEND = 3,
72 		DRM_LIST_PRIO = 4,
73 		DRM_LIST_RECLAIM = 5
74 	} list;			       /**< Which list we're on */
75 
76 	int dev_priv_size;		 /**< Size of buffer private storage */
77 	void *dev_private;		 /**< Per-buffer private storage */
78 };
79 
80 typedef struct drm_dma_handle {
81 	dma_addr_t busaddr;
82 	void *vaddr;
83 	size_t size;
84 } drm_dma_handle_t;
85 
86 /**
87  * Buffer entry.  There is one of this for each buffer size order.
88  */
89 struct drm_buf_entry {
90 	int buf_size;			/**< size */
91 	int buf_count;			/**< number of buffers */
92 	struct drm_buf *buflist;		/**< buffer list */
93 	int seg_count;
94 	int page_order;
95 	struct drm_dma_handle **seglist;
96 
97 	int low_mark;			/**< Low water mark */
98 	int high_mark;			/**< High water mark */
99 };
100 
101 /**
102  * DMA data.
103  */
104 struct drm_device_dma {
105 
106 	struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];	/**< buffers, grouped by their size order */
107 	int buf_count;			/**< total number of buffers */
108 	struct drm_buf **buflist;		/**< Vector of pointers into drm_device_dma::bufs */
109 	int seg_count;
110 	int page_count;			/**< number of pages */
111 	unsigned long *pagelist;	/**< page list */
112 	unsigned long byte_count;
113 	enum {
114 		_DRM_DMA_USE_AGP = 0x01,
115 		_DRM_DMA_USE_SG = 0x02,
116 		_DRM_DMA_USE_FB = 0x04,
117 		_DRM_DMA_USE_PCI_RO = 0x08
118 	} flags;
119 
120 };
121 
122 /**
123  * Scatter-gather memory.
124  */
125 struct drm_sg_mem {
126 	unsigned long handle;
127 	void *virtual;
128 	int pages;
129 	struct page **pagelist;
130 	dma_addr_t *busaddr;
131 };
132 
133 /**
134  * Kernel side of a mapping
135  */
136 struct drm_local_map {
137 	resource_size_t offset;	 /**< Requested physical address (0 for SAREA)*/
138 	unsigned long size;	 /**< Requested physical size (bytes) */
139 	enum drm_map_type type;	 /**< Type of memory to map */
140 	enum drm_map_flags flags;	 /**< Flags */
141 	void *handle;		 /**< User-space: "Handle" to pass to mmap() */
142 				 /**< Kernel-space: kernel-virtual address */
143 	int mtrr;		 /**< MTRR slot used */
144 };
145 
146 typedef struct drm_local_map drm_local_map_t;
147 
148 /**
149  * Mappings list
150  */
151 struct drm_map_list {
152 	struct list_head head;		/**< list head */
153 	struct drm_hash_item hash;
154 	struct drm_local_map *map;	/**< mapping */
155 	uint64_t user_token;
156 	struct drm_master *master;
157 };
158 
159 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset,
160 		      unsigned int size, enum drm_map_type type,
161 		      enum drm_map_flags flags, struct drm_local_map **map_p);
162 struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token);
163 void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
164 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
165 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev);
166 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma);
167 
168 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req);
169 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req);
170 
171 /**
172  * Test that the hardware lock is held by the caller, returning otherwise.
173  *
174  * \param dev DRM device.
175  * \param filp file pointer of the caller.
176  */
177 #define LOCK_TEST_WITH_RETURN( dev, _file_priv )				\
178 do {										\
179 	if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||	\
180 	    _file_priv->master->lock.file_priv != _file_priv)	{		\
181 		DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
182 			   __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
183 			   _file_priv->master->lock.file_priv, _file_priv);	\
184 		return -EINVAL;							\
185 	}									\
186 } while (0)
187 
188 void drm_legacy_idlelock_take(struct drm_lock_data *lock);
189 void drm_legacy_idlelock_release(struct drm_lock_data *lock);
190 
191 /* drm_pci.c dma alloc wrappers */
192 void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
193 
194 /* drm_memory.c */
195 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
196 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
197 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
198 
199 #endif /* __DRM_DRM_LEGACY_H__ */
200