1 #ifndef __DRM_DRM_LEGACY_H__
2 #define __DRM_DRM_LEGACY_H__
3
4 #include <drm/drm_auth.h>
5
6 /*
7 * Legacy driver interfaces for the Direct Rendering Manager
8 *
9 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
10 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
11 * Copyright (c) 2009-2010, Code Aurora Forum.
12 * All rights reserved.
13 * Copyright © 2014 Intel Corporation
14 * Daniel Vetter <daniel.vetter@ffwll.ch>
15 *
16 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
17 * Author: Gareth Hughes <gareth@valinux.com>
18 *
19 * Permission is hereby granted, free of charge, to any person obtaining a
20 * copy of this software and associated documentation files (the "Software"),
21 * to deal in the Software without restriction, including without limitation
22 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
23 * and/or sell copies of the Software, and to permit persons to whom the
24 * Software is furnished to do so, subject to the following conditions:
25 *
26 * The above copyright notice and this permission notice (including the next
27 * paragraph) shall be included in all copies or substantial portions of the
28 * Software.
29 *
30 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
31 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
32 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
33 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
34 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
35 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
36 * OTHER DEALINGS IN THE SOFTWARE.
37 */
38
39
40 /*
41 * Legacy Support for palateontologic DRM drivers
42 *
43 * If you add a new driver and it uses any of these functions or structures,
44 * you're doing it terribly wrong.
45 */
46
47 /**
48 * DMA buffer.
49 */
50 struct drm_buf {
51 int idx; /**< Index into master buflist */
52 int total; /**< Buffer size */
53 int order; /**< log-base-2(total) */
54 int used; /**< Amount of buffer in use (for DMA) */
55 unsigned long offset; /**< Byte offset (used internally) */
56 void *address; /**< Address of buffer */
57 unsigned long bus_address; /**< Bus address of buffer */
58 struct drm_buf *next; /**< Kernel-only: used for free list */
59 __volatile__ int waiting; /**< On kernel DMA queue */
60 __volatile__ int pending; /**< On hardware DMA queue */
61 struct drm_file *file_priv; /**< Private of holding file descr */
62 int context; /**< Kernel queue for this buffer */
63 int while_locked; /**< Dispatch this buffer while locked */
64 enum {
65 DRM_LIST_NONE = 0,
66 DRM_LIST_FREE = 1,
67 DRM_LIST_WAIT = 2,
68 DRM_LIST_PEND = 3,
69 DRM_LIST_PRIO = 4,
70 DRM_LIST_RECLAIM = 5
71 } list; /**< Which list we're on */
72
73 int dev_priv_size; /**< Size of buffer private storage */
74 void *dev_private; /**< Per-buffer private storage */
75 };
76
77 typedef struct drm_dma_handle {
78 dma_addr_t busaddr;
79 void *vaddr;
80 size_t size;
81 } drm_dma_handle_t;
82
83 /**
84 * Buffer entry. There is one of this for each buffer size order.
85 */
86 struct drm_buf_entry {
87 int buf_size; /**< size */
88 int buf_count; /**< number of buffers */
89 struct drm_buf *buflist; /**< buffer list */
90 int seg_count;
91 int page_order;
92 struct drm_dma_handle **seglist;
93
94 int low_mark; /**< Low water mark */
95 int high_mark; /**< High water mark */
96 };
97
98 /**
99 * DMA data.
100 */
101 struct drm_device_dma {
102
103 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
104 int buf_count; /**< total number of buffers */
105 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
106 int seg_count;
107 int page_count; /**< number of pages */
108 unsigned long *pagelist; /**< page list */
109 unsigned long byte_count;
110 enum {
111 _DRM_DMA_USE_AGP = 0x01,
112 _DRM_DMA_USE_SG = 0x02,
113 _DRM_DMA_USE_FB = 0x04,
114 _DRM_DMA_USE_PCI_RO = 0x08
115 } flags;
116
117 };
118
119 /**
120 * Scatter-gather memory.
121 */
122 struct drm_sg_mem {
123 unsigned long handle;
124 void *virtual;
125 int pages;
126 struct page **pagelist;
127 dma_addr_t *busaddr;
128 };
129
130 /**
131 * Kernel side of a mapping
132 */
133 struct drm_local_map {
134 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
135 unsigned long size; /**< Requested physical size (bytes) */
136 enum drm_map_type type; /**< Type of memory to map */
137 enum drm_map_flags flags; /**< Flags */
138 void *handle; /**< User-space: "Handle" to pass to mmap() */
139 /**< Kernel-space: kernel-virtual address */
140 int mtrr; /**< MTRR slot used */
141 };
142
143 typedef struct drm_local_map drm_local_map_t;
144
145 /**
146 * Mappings list
147 */
148 struct drm_map_list {
149 struct list_head head; /**< list head */
150 struct drm_hash_item hash;
151 struct drm_local_map *map; /**< mapping */
152 uint64_t user_token;
153 struct drm_master *master;
154 };
155
156 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset,
157 unsigned int size, enum drm_map_type type,
158 enum drm_map_flags flags, struct drm_local_map **map_p);
159 void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
160 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
161 void drm_legacy_master_rmmaps(struct drm_device *dev,
162 struct drm_master *master);
163 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev);
164 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma);
165
166 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req);
167 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req);
168
169 /**
170 * Test that the hardware lock is held by the caller, returning otherwise.
171 *
172 * \param dev DRM device.
173 * \param filp file pointer of the caller.
174 */
175 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
176 do { \
177 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
178 _file_priv->master->lock.file_priv != _file_priv) { \
179 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
180 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
181 _file_priv->master->lock.file_priv, _file_priv); \
182 return -EINVAL; \
183 } \
184 } while (0)
185
186 void drm_legacy_idlelock_take(struct drm_lock_data *lock);
187 void drm_legacy_idlelock_release(struct drm_lock_data *lock);
188
189 /* drm_pci.c dma alloc wrappers */
190 void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
191
192 /* drm_memory.c */
193 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
194 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
195 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
196
drm_legacy_findmap(struct drm_device * dev,unsigned int token)197 static inline struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
198 unsigned int token)
199 {
200 struct drm_map_list *_entry;
201 list_for_each_entry(_entry, &dev->maplist, head)
202 if (_entry->user_token == token)
203 return _entry->map;
204 return NULL;
205 }
206
207 #endif /* __DRM_DRM_LEGACY_H__ */
208