1 /* drm_agpsupport.h -- DRM support for AGP/GART backend -*- linux-c -*-
2 * Created: Mon Dec 13 09:56:45 1999 by faith@precisioninsight.com
3 *
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
6 * All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
17 * Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * Author:
28 * Rickard E. (Rik) Faith <faith@valinux.com>
29 * Gareth Hughes <gareth@valinux.com>
30 */
31
32 #include "drmP.h"
33 #include <linux/module.h>
34
35 #if __REALLY_HAVE_AGP
36
37 #define DRM_AGP_GET (drm_agp_t *)inter_module_get("drm_agp")
38 #define DRM_AGP_PUT inter_module_put("drm_agp")
39
40 static const drm_agp_t *drm_agp = NULL;
41
DRM(agp_info)42 int DRM(agp_info)(struct inode *inode, struct file *filp,
43 unsigned int cmd, unsigned long arg)
44 {
45 drm_file_t *priv = filp->private_data;
46 drm_device_t *dev = priv->dev;
47 agp_kern_info *kern;
48 drm_agp_info_t info;
49
50 if (!dev->agp || !dev->agp->acquired || !drm_agp->copy_info)
51 return -EINVAL;
52
53 kern = &dev->agp->agp_info;
54 info.agp_version_major = kern->version.major;
55 info.agp_version_minor = kern->version.minor;
56 info.mode = kern->mode;
57 info.aperture_base = kern->aper_base;
58 info.aperture_size = kern->aper_size * 1024 * 1024;
59 info.memory_allowed = kern->max_memory << PAGE_SHIFT;
60 info.memory_used = kern->current_memory << PAGE_SHIFT;
61 info.id_vendor = kern->device->vendor;
62 info.id_device = kern->device->device;
63
64 if (copy_to_user((drm_agp_info_t *)arg, &info, sizeof(info)))
65 return -EFAULT;
66 return 0;
67 }
68
DRM(agp_acquire)69 int DRM(agp_acquire)(struct inode *inode, struct file *filp,
70 unsigned int cmd, unsigned long arg)
71 {
72 drm_file_t *priv = filp->private_data;
73 drm_device_t *dev = priv->dev;
74 int retcode;
75
76 if (!dev->agp)
77 return -ENODEV;
78 if (dev->agp->acquired)
79 return -EBUSY;
80 if(!drm_agp->acquire)
81 return -EINVAL;
82 if ((retcode = drm_agp->acquire()))
83 return retcode;
84 dev->agp->acquired = 1;
85 return 0;
86 }
87
DRM(agp_release)88 int DRM(agp_release)(struct inode *inode, struct file *filp,
89 unsigned int cmd, unsigned long arg)
90 {
91 drm_file_t *priv = filp->private_data;
92 drm_device_t *dev = priv->dev;
93
94 if (!dev->agp || !dev->agp->acquired || !drm_agp->release)
95 return -EINVAL;
96 drm_agp->release();
97 dev->agp->acquired = 0;
98 return 0;
99
100 }
101
DRM(agp_do_release)102 void DRM(agp_do_release)(void)
103 {
104 if (drm_agp->release) drm_agp->release();
105 }
106
DRM(agp_enable)107 int DRM(agp_enable)(struct inode *inode, struct file *filp,
108 unsigned int cmd, unsigned long arg)
109 {
110 drm_file_t *priv = filp->private_data;
111 drm_device_t *dev = priv->dev;
112 drm_agp_mode_t mode;
113
114 if (!dev->agp || !dev->agp->acquired || !drm_agp->enable)
115 return -EINVAL;
116
117 if (copy_from_user(&mode, (drm_agp_mode_t *)arg, sizeof(mode)))
118 return -EFAULT;
119
120 dev->agp->mode = mode.mode;
121 drm_agp->enable(mode.mode);
122 dev->agp->base = dev->agp->agp_info.aper_base;
123 dev->agp->enabled = 1;
124 return 0;
125 }
126
DRM(agp_alloc)127 int DRM(agp_alloc)(struct inode *inode, struct file *filp,
128 unsigned int cmd, unsigned long arg)
129 {
130 drm_file_t *priv = filp->private_data;
131 drm_device_t *dev = priv->dev;
132 drm_agp_buffer_t request;
133 drm_agp_mem_t *entry;
134 agp_memory *memory;
135 unsigned long pages;
136 u32 type;
137
138 if (!dev->agp || !dev->agp->acquired) return -EINVAL;
139 if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request)))
140 return -EFAULT;
141 if (!(entry = DRM(alloc)(sizeof(*entry), DRM_MEM_AGPLISTS)))
142 return -ENOMEM;
143
144 memset(entry, 0, sizeof(*entry));
145
146 pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
147 type = (u32) request.type;
148
149 if (!(memory = DRM(alloc_agp)(pages, type))) {
150 DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
151 return -ENOMEM;
152 }
153
154 entry->handle = (unsigned long)memory->memory;
155 entry->memory = memory;
156 entry->bound = 0;
157 entry->pages = pages;
158 entry->prev = NULL;
159 entry->next = dev->agp->memory;
160 if (dev->agp->memory) dev->agp->memory->prev = entry;
161 dev->agp->memory = entry;
162
163 request.handle = entry->handle;
164 request.physical = memory->physical;
165
166 if (copy_to_user((drm_agp_buffer_t *)arg, &request, sizeof(request))) {
167 dev->agp->memory = entry->next;
168 dev->agp->memory->prev = NULL;
169 DRM(free_agp)(memory, pages);
170 DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
171 return -EFAULT;
172 }
173 return 0;
174 }
175
DRM(agp_lookup_entry)176 static drm_agp_mem_t *DRM(agp_lookup_entry)(drm_device_t *dev,
177 unsigned long handle)
178 {
179 drm_agp_mem_t *entry;
180
181 for (entry = dev->agp->memory; entry; entry = entry->next) {
182 if (entry->handle == handle) return entry;
183 }
184 return NULL;
185 }
186
DRM(agp_unbind)187 int DRM(agp_unbind)(struct inode *inode, struct file *filp,
188 unsigned int cmd, unsigned long arg)
189 {
190 drm_file_t *priv = filp->private_data;
191 drm_device_t *dev = priv->dev;
192 drm_agp_binding_t request;
193 drm_agp_mem_t *entry;
194
195 if (!dev->agp || !dev->agp->acquired) return -EINVAL;
196 if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
197 return -EFAULT;
198 if (!(entry = DRM(agp_lookup_entry)(dev, request.handle)))
199 return -EINVAL;
200 if (!entry->bound) return -EINVAL;
201 return DRM(unbind_agp)(entry->memory);
202 }
203
DRM(agp_bind)204 int DRM(agp_bind)(struct inode *inode, struct file *filp,
205 unsigned int cmd, unsigned long arg)
206 {
207 drm_file_t *priv = filp->private_data;
208 drm_device_t *dev = priv->dev;
209 drm_agp_binding_t request;
210 drm_agp_mem_t *entry;
211 int retcode;
212 int page;
213
214 if (!dev->agp || !dev->agp->acquired || !drm_agp->bind_memory)
215 return -EINVAL;
216 if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
217 return -EFAULT;
218 if (!(entry = DRM(agp_lookup_entry)(dev, request.handle)))
219 return -EINVAL;
220 if (entry->bound) return -EINVAL;
221 page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE;
222 if ((retcode = DRM(bind_agp)(entry->memory, page))) return retcode;
223 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
224 DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
225 dev->agp->base, entry->bound);
226 return 0;
227 }
228
DRM(agp_free)229 int DRM(agp_free)(struct inode *inode, struct file *filp,
230 unsigned int cmd, unsigned long arg)
231 {
232 drm_file_t *priv = filp->private_data;
233 drm_device_t *dev = priv->dev;
234 drm_agp_buffer_t request;
235 drm_agp_mem_t *entry;
236
237 if (!dev->agp || !dev->agp->acquired) return -EINVAL;
238 if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request)))
239 return -EFAULT;
240 if (!(entry = DRM(agp_lookup_entry)(dev, request.handle)))
241 return -EINVAL;
242 if (entry->bound) DRM(unbind_agp)(entry->memory);
243
244 if (entry->prev) entry->prev->next = entry->next;
245 else dev->agp->memory = entry->next;
246 if (entry->next) entry->next->prev = entry->prev;
247 DRM(free_agp)(entry->memory, entry->pages);
248 DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
249 return 0;
250 }
251
DRM(agp_init)252 drm_agp_head_t *DRM(agp_init)(void)
253 {
254 drm_agp_head_t *head = NULL;
255
256 drm_agp = DRM_AGP_GET;
257 if (drm_agp) {
258 if (!(head = DRM(alloc)(sizeof(*head), DRM_MEM_AGPLISTS)))
259 return NULL;
260 memset((void *)head, 0, sizeof(*head));
261 drm_agp->copy_info(&head->agp_info);
262 if (head->agp_info.chipset == NOT_SUPPORTED) {
263 DRM(free)(head, sizeof(*head), DRM_MEM_AGPLISTS);
264 return NULL;
265 }
266 head->memory = NULL;
267
268 head->cant_use_aperture = head->agp_info.cant_use_aperture;
269 head->page_mask = head->agp_info.page_mask;
270
271 DRM_INFO("AGP %d.%d Aperture @ 0x%08lx %ZuMB\n",
272 head->agp_info.version.major,
273 head->agp_info.version.minor,
274 head->agp_info.aper_base,
275 head->agp_info.aper_size);
276 }
277 return head;
278 }
279
DRM(agp_uninit)280 void DRM(agp_uninit)(void)
281 {
282 DRM_AGP_PUT;
283 drm_agp = NULL;
284 }
285
DRM(agp_allocate_memory)286 agp_memory *DRM(agp_allocate_memory)(size_t pages, u32 type)
287 {
288 if (!drm_agp->allocate_memory) return NULL;
289 return drm_agp->allocate_memory(pages, type);
290 }
291
DRM(agp_free_memory)292 int DRM(agp_free_memory)(agp_memory *handle)
293 {
294 if (!handle || !drm_agp->free_memory) return 0;
295 drm_agp->free_memory(handle);
296 return 1;
297 }
298
DRM(agp_bind_memory)299 int DRM(agp_bind_memory)(agp_memory *handle, off_t start)
300 {
301 if (!handle || !drm_agp->bind_memory) return -EINVAL;
302 return drm_agp->bind_memory(handle, start);
303 }
304
DRM(agp_unbind_memory)305 int DRM(agp_unbind_memory)(agp_memory *handle)
306 {
307 if (!handle || !drm_agp->unbind_memory) return -EINVAL;
308 return drm_agp->unbind_memory(handle);
309 }
310
311 #endif /* __REALLY_HAVE_AGP */
312