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 * $FreeBSD$
32 */
33
34 #include "dev/drm/drmP.h"
35
36 int DRM(agp_info)(DRM_IOCTL_ARGS)
37 {
38 DRM_DEVICE;
39 struct agp_info *kern;
40 drm_agp_info_t info;
41
42 if (!dev->agp || !dev->agp->acquired)
43 return EINVAL;
44
45 kern = &dev->agp->info;
46 agp_get_info(dev->agp->agpdev, kern);
47 info.agp_version_major = 1;
48 info.agp_version_minor = 0;
49 info.mode = kern->ai_mode;
50 info.aperture_base = kern->ai_aperture_base;
51 info.aperture_size = kern->ai_aperture_size;
52 info.memory_allowed = kern->ai_memory_allowed;
53 info.memory_used = kern->ai_memory_used;
54 info.id_vendor = kern->ai_devid & 0xffff;
55 info.id_device = kern->ai_devid >> 16;
56
57 *(drm_agp_info_t *) data = info;
58 return 0;
59 }
60
61 int DRM(agp_acquire)(DRM_IOCTL_ARGS)
62 {
63 DRM_DEVICE;
64 int retcode;
65
66 if (!dev->agp || dev->agp->acquired)
67 return EINVAL;
68 retcode = agp_acquire(dev->agp->agpdev);
69 if (retcode)
70 return retcode;
71 dev->agp->acquired = 1;
72 return 0;
73 }
74
75 int DRM(agp_release)(DRM_IOCTL_ARGS)
76 {
77 DRM_DEVICE;
78
79 if (!dev->agp || !dev->agp->acquired)
80 return EINVAL;
81 agp_release(dev->agp->agpdev);
82 dev->agp->acquired = 0;
83 return 0;
84
85 }
86
87 void DRM(agp_do_release)(void)
88 {
89 device_t agpdev;
90
91 agpdev = DRM_AGP_FIND_DEVICE();
92 if (agpdev)
93 agp_release(agpdev);
94 }
95
96 int DRM(agp_enable)(DRM_IOCTL_ARGS)
97 {
98 DRM_DEVICE;
99 drm_agp_mode_t mode;
100
101 if (!dev->agp || !dev->agp->acquired)
102 return EINVAL;
103
104 mode = *(drm_agp_mode_t *) data;
105
106 dev->agp->mode = mode.mode;
107 agp_enable(dev->agp->agpdev, mode.mode);
108 dev->agp->base = dev->agp->info.ai_aperture_base;
109 dev->agp->enabled = 1;
110 return 0;
111 }
112
113 int DRM(agp_alloc)(DRM_IOCTL_ARGS)
114 {
115 DRM_DEVICE;
116 drm_agp_buffer_t request;
117 drm_agp_mem_t *entry;
118 void *handle;
119 unsigned long pages;
120 u_int32_t type;
121 struct agp_memory_info info;
122
123 if (!dev->agp || !dev->agp->acquired)
124 return EINVAL;
125
126 request = *(drm_agp_buffer_t *) data;
127
128 if (!(entry = DRM(alloc)(sizeof(*entry), DRM_MEM_AGPLISTS)))
129 return ENOMEM;
130
131 bzero(entry, sizeof(*entry));
132
133 pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
134 type = (u_int32_t) request.type;
135
136 if (!(handle = DRM(alloc_agp)(pages, type))) {
137 DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
138 return ENOMEM;
139 }
140
141 entry->handle = handle;
142 entry->bound = 0;
143 entry->pages = pages;
144 entry->prev = NULL;
145 entry->next = dev->agp->memory;
146 if (dev->agp->memory)
147 dev->agp->memory->prev = entry;
148 dev->agp->memory = entry;
149
150 agp_memory_info(dev->agp->agpdev, entry->handle, &info);
151
152 request.handle = (unsigned long) entry->handle;
153 request.physical = info.ami_physical;
154
155 *(drm_agp_buffer_t *) data = request;
156
157 return 0;
158 }
159
160 static drm_agp_mem_t * DRM(agp_lookup_entry)(drm_device_t *dev, void *handle)
161 {
162 drm_agp_mem_t *entry;
163
164 for (entry = dev->agp->memory; entry; entry = entry->next) {
165 if (entry->handle == handle) return entry;
166 }
167 return NULL;
168 }
169
170 int DRM(agp_unbind)(DRM_IOCTL_ARGS)
171 {
172 DRM_DEVICE;
173 drm_agp_binding_t request;
174 drm_agp_mem_t *entry;
175 int retcode;
176
177 if (!dev->agp || !dev->agp->acquired)
178 return EINVAL;
179 request = *(drm_agp_binding_t *) data;
180 if (!(entry = DRM(agp_lookup_entry)(dev, (void *) request.handle)))
181 return EINVAL;
182 if (!entry->bound) return EINVAL;
183 retcode=DRM(unbind_agp)(entry->handle);
184 if (!retcode)
185 {
186 entry->bound=0;
187 return 0;
188 }
189 else
190 return retcode;
191 }
192
193 int DRM(agp_bind)(DRM_IOCTL_ARGS)
194 {
195 DRM_DEVICE;
196 drm_agp_binding_t request;
197 drm_agp_mem_t *entry;
198 int retcode;
199 int page;
200
201 DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE);
202 if (!dev->agp || !dev->agp->acquired)
203 return EINVAL;
204 request = *(drm_agp_binding_t *) data;
205 if (!(entry = DRM(agp_lookup_entry)(dev, (void *) request.handle)))
206 return EINVAL;
207 if (entry->bound) return EINVAL;
208 page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE;
209 if ((retcode = DRM(bind_agp)(entry->handle, page)))
210 return retcode;
211 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
212 return 0;
213 }
214
215 int DRM(agp_free)(DRM_IOCTL_ARGS)
216 {
217 DRM_DEVICE;
218 drm_agp_buffer_t request;
219 drm_agp_mem_t *entry;
220
221 if (!dev->agp || !dev->agp->acquired)
222 return EINVAL;
223 request = *(drm_agp_buffer_t *) data;
224 if (!(entry = DRM(agp_lookup_entry)(dev, (void*) request.handle)))
225 return EINVAL;
226 if (entry->bound)
227 DRM(unbind_agp)(entry->handle);
228
229 if (entry->prev)
230 entry->prev->next = entry->next;
231 else
232 dev->agp->memory = entry->next;
233 if (entry->next)
234 entry->next->prev = entry->prev;
235 DRM(free_agp)(entry->handle, entry->pages);
236 DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
237 return 0;
238 }
239
240 drm_agp_head_t *DRM(agp_init)(void)
241 {
242 device_t agpdev;
243 drm_agp_head_t *head = NULL;
244 int agp_available = 1;
245
246 agpdev = DRM_AGP_FIND_DEVICE();
247 if (!agpdev)
248 agp_available = 0;
249
250 DRM_DEBUG("agp_available = %d\n", agp_available);
251
252 if (agp_available) {
253 if (!(head = DRM(alloc)(sizeof(*head), DRM_MEM_AGPLISTS)))
254 return NULL;
255 bzero((void *)head, sizeof(*head));
256 head->agpdev = agpdev;
257 agp_get_info(agpdev, &head->info);
258 head->memory = NULL;
259 DRM_INFO("AGP at 0x%08lx %dMB\n",
260 (long)head->info.ai_aperture_base,
261 (int)(head->info.ai_aperture_size >> 20));
262 }
263 return head;
264 }
265
266 void DRM(agp_uninit)(void)
267 {
268 /* FIXME: What goes here */
269 }
270
271
272 agp_memory *DRM(agp_allocate_memory)(size_t pages, u32 type)
273 {
274 device_t agpdev;
275
276 agpdev = DRM_AGP_FIND_DEVICE();
277 if (!agpdev)
278 return NULL;
279
280 return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT);
281 }
282
283 int DRM(agp_free_memory)(agp_memory *handle)
284 {
285 device_t agpdev;
286
287 agpdev = DRM_AGP_FIND_DEVICE();
288 if (!agpdev || !handle)
289 return 0;
290
291 agp_free_memory(agpdev, handle);
292 return 1;
293 }
294
295 int DRM(agp_bind_memory)(agp_memory *handle, off_t start)
296 {
297 device_t agpdev;
298
299 agpdev = DRM_AGP_FIND_DEVICE();
300 if (!agpdev || !handle)
301 return EINVAL;
302
303 return agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
304 }
305
306 int DRM(agp_unbind_memory)(agp_memory *handle)
307 {
308 device_t agpdev;
309
310 agpdev = DRM_AGP_FIND_DEVICE();
311 if (!agpdev || !handle)
312 return EINVAL;
313
314 return agp_unbind_memory(agpdev, handle);
315 }
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