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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
40struct drm_device;
41struct drm_driver;
42struct file;
43struct pci_driver;
44
45/*
46 * Legacy Support for palateontologic DRM drivers
47 *
48 * If you add a new driver and it uses any of these functions or structures,
49 * you're doing it terribly wrong.
50 */
51
52/**
53 * DMA buffer.
54 */
55struct drm_buf {
56 int idx; /**< Index into master buflist */
57 int total; /**< Buffer size */
58 int order; /**< log-base-2(total) */
59 int used; /**< Amount of buffer in use (for DMA) */
60 unsigned long offset; /**< Byte offset (used internally) */
61 void *address; /**< Address of buffer */
62 unsigned long bus_address; /**< Bus address of buffer */
63 struct drm_buf *next; /**< Kernel-only: used for free list */
64 __volatile__ int waiting; /**< On kernel DMA queue */
65 __volatile__ int pending; /**< On hardware DMA queue */
66 struct drm_file *file_priv; /**< Private of holding file descr */
67 int context; /**< Kernel queue for this buffer */
68 int while_locked; /**< Dispatch this buffer while locked */
69 enum {
70 DRM_LIST_NONE = 0,
71 DRM_LIST_FREE = 1,
72 DRM_LIST_WAIT = 2,
73 DRM_LIST_PEND = 3,
74 DRM_LIST_PRIO = 4,
75 DRM_LIST_RECLAIM = 5
76 } list; /**< Which list we're on */
77
78 int dev_priv_size; /**< Size of buffer private storage */
79 void *dev_private; /**< Per-buffer private storage */
80};
81
82typedef struct drm_dma_handle {
83 dma_addr_t busaddr;
84 void *vaddr;
85 size_t size;
86} drm_dma_handle_t;
87
88/**
89 * Buffer entry. There is one of this for each buffer size order.
90 */
91struct drm_buf_entry {
92 int buf_size; /**< size */
93 int buf_count; /**< number of buffers */
94 struct drm_buf *buflist; /**< buffer list */
95 int seg_count;
96 int page_order;
97 struct drm_dma_handle **seglist;
98
99 int low_mark; /**< Low water mark */
100 int high_mark; /**< High water mark */
101};
102
103/**
104 * DMA data.
105 */
106struct drm_device_dma {
107
108 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
109 int buf_count; /**< total number of buffers */
110 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
111 int seg_count;
112 int page_count; /**< number of pages */
113 unsigned long *pagelist; /**< page list */
114 unsigned long byte_count;
115 enum {
116 _DRM_DMA_USE_AGP = 0x01,
117 _DRM_DMA_USE_SG = 0x02,
118 _DRM_DMA_USE_FB = 0x04,
119 _DRM_DMA_USE_PCI_RO = 0x08
120 } flags;
121
122};
123
124/**
125 * Scatter-gather memory.
126 */
127struct drm_sg_mem {
128 unsigned long handle;
129 void *virtual;
130 int pages;
131 struct page **pagelist;
132 dma_addr_t *busaddr;
133};
134
135/**
136 * Kernel side of a mapping
137 */
138struct drm_local_map {
139 dma_addr_t offset; /**< Requested physical address (0 for SAREA)*/
140 unsigned long size; /**< Requested physical size (bytes) */
141 enum drm_map_type type; /**< Type of memory to map */
142 enum drm_map_flags flags; /**< Flags */
143 void *handle; /**< User-space: "Handle" to pass to mmap() */
144 /**< Kernel-space: kernel-virtual address */
145 int mtrr; /**< MTRR slot used */
146};
147
148typedef struct drm_local_map drm_local_map_t;
149
150/**
151 * Mappings list
152 */
153struct drm_map_list {
154 struct list_head head; /**< list head */
155 struct drm_hash_item hash;
156 struct drm_local_map *map; /**< mapping */
157 uint64_t user_token;
158 struct drm_master *master;
159};
160
161int drm_legacy_addmap(struct drm_device *d, resource_size_t offset,
162 unsigned int size, enum drm_map_type type,
163 enum drm_map_flags flags, struct drm_local_map **map_p);
164struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token);
165void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
166int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
167struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev);
168int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma);
169
170int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req);
171int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req);
172
173/**
174 * Test that the hardware lock is held by the caller, returning otherwise.
175 *
176 * \param dev DRM device.
177 * \param filp file pointer of the caller.
178 */
179#define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
180do { \
181 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
182 _file_priv->master->lock.file_priv != _file_priv) { \
183 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
184 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
185 _file_priv->master->lock.file_priv, _file_priv); \
186 return -EINVAL; \
187 } \
188} while (0)
189
190void drm_legacy_idlelock_take(struct drm_lock_data *lock);
191void drm_legacy_idlelock_release(struct drm_lock_data *lock);
192
193/* drm_pci.c */
194
195#ifdef CONFIG_PCI
196
197struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
198 size_t align);
199void drm_pci_free(struct drm_device *dev, struct drm_dma_handle *dmah);
200
201int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
202void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
203
204#else
205
206static inline struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev,
207 size_t size, size_t align)
208{
209 return NULL;
210}
211
212static inline void drm_pci_free(struct drm_device *dev,
213 struct drm_dma_handle *dmah)
214{
215}
216
217static inline int drm_legacy_pci_init(struct drm_driver *driver,
218 struct pci_driver *pdriver)
219{
220 return -EINVAL;
221}
222
223static inline void drm_legacy_pci_exit(struct drm_driver *driver,
224 struct pci_driver *pdriver)
225{
226}
227
228#endif
229
230/* drm_memory.c */
231void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
232void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
233void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
234
235#endif /* __DRM_DRM_LEGACY_H__ */