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[FreeBSD/releng/9.2.git] / sys / dev / drm2 / drm_agpsupport.c
1 /*-
2  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the next
14  * paragraph) shall be included in all copies or substantial portions of the
15  * Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23  * OTHER DEALINGS IN THE SOFTWARE.
24  *
25  * Author:
26  *    Rickard E. (Rik) Faith <faith@valinux.com>
27  *    Gareth Hughes <gareth@valinux.com>
28  *
29  */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 /** @file drm_agpsupport.c
35  * Support code for tying the kernel AGP support to DRM drivers and
36  * the DRM's AGP ioctls.
37  */
38
39 #include <dev/drm2/drmP.h>
40
41 #include <dev/agp/agpreg.h>
42 #include <dev/pci/pcireg.h>
43
44 /* Returns 1 if AGP or 0 if not. */
45 static int
46 drm_device_find_capability(struct drm_device *dev, int cap)
47 {
48
49         return (pci_find_cap(dev->device, cap, NULL) == 0);
50 }
51
52 int drm_device_is_agp(struct drm_device *dev)
53 {
54         if (dev->driver->device_is_agp != NULL) {
55                 int ret;
56
57                 /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely
58                  * AGP, 2 = fall back to PCI capability
59                  */
60                 ret = (*dev->driver->device_is_agp)(dev);
61                 if (ret != DRM_MIGHT_BE_AGP)
62                         return ret;
63         }
64
65         return (drm_device_find_capability(dev, PCIY_AGP));
66 }
67
68 int drm_device_is_pcie(struct drm_device *dev)
69 {
70         return (drm_device_find_capability(dev, PCIY_EXPRESS));
71 }
72
73 int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info)
74 {
75         struct agp_info *kern;
76
77         if (!dev->agp || !dev->agp->acquired)
78                 return EINVAL;
79
80         kern                   = &dev->agp->info;
81         agp_get_info(dev->agp->agpdev, kern);
82         info->agp_version_major = 1;
83         info->agp_version_minor = 0;
84         info->mode              = kern->ai_mode;
85         info->aperture_base     = kern->ai_aperture_base;
86         info->aperture_size     = kern->ai_aperture_size;
87         info->memory_allowed    = kern->ai_memory_allowed;
88         info->memory_used       = kern->ai_memory_used;
89         info->id_vendor         = kern->ai_devid & 0xffff;
90         info->id_device         = kern->ai_devid >> 16;
91
92         return 0;
93 }
94
95 int drm_agp_info_ioctl(struct drm_device *dev, void *data,
96                        struct drm_file *file_priv)
97 {
98         int err;
99         struct drm_agp_info info;
100
101         err = drm_agp_info(dev, &info);
102         if (err != 0)
103                 return err;
104
105         *(struct drm_agp_info *) data = info;
106         return 0;
107 }
108
109 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
110                           struct drm_file *file_priv)
111 {
112
113         return drm_agp_acquire(dev);
114 }
115
116 int drm_agp_acquire(struct drm_device *dev)
117 {
118         int retcode;
119
120         if (!dev->agp || dev->agp->acquired)
121                 return EINVAL;
122
123         retcode = agp_acquire(dev->agp->agpdev);
124         if (retcode)
125                 return retcode;
126
127         dev->agp->acquired = 1;
128         return 0;
129 }
130
131 int drm_agp_release_ioctl(struct drm_device *dev, void *data,
132                           struct drm_file *file_priv)
133 {
134
135         return drm_agp_release(dev);
136 }
137
138 int drm_agp_release(struct drm_device * dev)
139 {
140         if (!dev->agp || !dev->agp->acquired)
141                 return EINVAL;
142         agp_release(dev->agp->agpdev);
143         dev->agp->acquired = 0;
144         return 0;
145 }
146
147 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode)
148 {
149
150         if (!dev->agp || !dev->agp->acquired)
151                 return EINVAL;
152         
153         dev->agp->mode    = mode.mode;
154         agp_enable(dev->agp->agpdev, mode.mode);
155         dev->agp->enabled = 1;
156         return 0;
157 }
158
159 int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
160                          struct drm_file *file_priv)
161 {
162         struct drm_agp_mode mode;
163
164         mode = *(struct drm_agp_mode *) data;
165
166         return drm_agp_enable(dev, mode);
167 }
168
169 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
170 {
171         drm_agp_mem_t    *entry;
172         void             *handle;
173         unsigned long    pages;
174         u_int32_t        type;
175         struct agp_memory_info info;
176
177         if (!dev->agp || !dev->agp->acquired)
178                 return EINVAL;
179
180         entry = malloc(sizeof(*entry), DRM_MEM_AGPLISTS, M_NOWAIT | M_ZERO);
181         if (entry == NULL)
182                 return ENOMEM;
183
184         pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
185         type = (u_int32_t) request->type;
186
187         DRM_UNLOCK(dev);
188         handle = drm_agp_allocate_memory(pages, type);
189         DRM_LOCK(dev);
190         if (handle == NULL) {
191                 free(entry, DRM_MEM_AGPLISTS);
192                 return ENOMEM;
193         }
194         
195         entry->handle    = handle;
196         entry->bound     = 0;
197         entry->pages     = pages;
198         entry->prev      = NULL;
199         entry->next      = dev->agp->memory;
200         if (dev->agp->memory)
201                 dev->agp->memory->prev = entry;
202         dev->agp->memory = entry;
203
204         agp_memory_info(dev->agp->agpdev, entry->handle, &info);
205
206         request->handle   = (unsigned long) entry->handle;
207         request->physical = info.ami_physical;
208
209         return 0;
210 }
211
212 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
213                         struct drm_file *file_priv)
214 {
215         struct drm_agp_buffer request;
216         int retcode;
217
218         request = *(struct drm_agp_buffer *) data;
219
220         DRM_LOCK(dev);
221         retcode = drm_agp_alloc(dev, &request);
222         DRM_UNLOCK(dev);
223
224         *(struct drm_agp_buffer *) data = request;
225
226         return retcode;
227 }
228
229 static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev,
230                                             void *handle)
231 {
232         drm_agp_mem_t *entry;
233
234         for (entry = dev->agp->memory; entry; entry = entry->next) {
235                 if (entry->handle == handle) return entry;
236         }
237         return NULL;
238 }
239
240 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
241 {
242         drm_agp_mem_t     *entry;
243         int retcode;
244
245         if (!dev->agp || !dev->agp->acquired)
246                 return EINVAL;
247
248         entry = drm_agp_lookup_entry(dev, (void *)request->handle);
249         if (entry == NULL || !entry->bound)
250                 return EINVAL;
251
252         DRM_UNLOCK(dev);
253         retcode = drm_agp_unbind_memory(entry->handle);
254         DRM_LOCK(dev);
255
256         if (retcode == 0)
257                 entry->bound = 0;
258
259         return retcode;
260 }
261
262 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
263                          struct drm_file *file_priv)
264 {
265         struct drm_agp_binding request;
266         int retcode;
267
268         request = *(struct drm_agp_binding *) data;
269
270         DRM_LOCK(dev);
271         retcode = drm_agp_unbind(dev, &request);
272         DRM_UNLOCK(dev);
273
274         return retcode;
275 }
276
277 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
278 {
279         drm_agp_mem_t     *entry;
280         int               retcode;
281         int               page;
282         
283         if (!dev->agp || !dev->agp->acquired)
284                 return EINVAL;
285
286         DRM_DEBUG("agp_bind, page_size=%x\n", (int)PAGE_SIZE);
287
288         entry = drm_agp_lookup_entry(dev, (void *)request->handle);
289         if (entry == NULL || entry->bound)
290                 return EINVAL;
291
292         page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
293
294         DRM_UNLOCK(dev);
295         retcode = drm_agp_bind_memory(entry->handle, page);
296         DRM_LOCK(dev);
297         if (retcode == 0)
298                 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
299
300         return retcode;
301 }
302
303 int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
304                        struct drm_file *file_priv)
305 {
306         struct drm_agp_binding request;
307         int retcode;
308
309         request = *(struct drm_agp_binding *) data;
310
311         DRM_LOCK(dev);
312         retcode = drm_agp_bind(dev, &request);
313         DRM_UNLOCK(dev);
314
315         return retcode;
316 }
317
318 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
319 {
320         drm_agp_mem_t    *entry;
321         
322         if (!dev->agp || !dev->agp->acquired)
323                 return EINVAL;
324
325         entry = drm_agp_lookup_entry(dev, (void*)request->handle);
326         if (entry == NULL)
327                 return EINVAL;
328    
329         if (entry->prev)
330                 entry->prev->next = entry->next;
331         else
332                 dev->agp->memory  = entry->next;
333         if (entry->next)
334                 entry->next->prev = entry->prev;
335
336         DRM_UNLOCK(dev);
337         if (entry->bound)
338                 drm_agp_unbind_memory(entry->handle);
339         drm_agp_free_memory(entry->handle);
340         DRM_LOCK(dev);
341
342         free(entry, DRM_MEM_AGPLISTS);
343
344         return 0;
345
346 }
347
348 int drm_agp_free_ioctl(struct drm_device *dev, void *data,
349                        struct drm_file *file_priv)
350 {
351         struct drm_agp_buffer request;
352         int retcode;
353
354         request = *(struct drm_agp_buffer *) data;
355
356         DRM_LOCK(dev);
357         retcode = drm_agp_free(dev, &request);
358         DRM_UNLOCK(dev);
359
360         return retcode;
361 }
362
363 drm_agp_head_t *drm_agp_init(void)
364 {
365         device_t agpdev;
366         drm_agp_head_t *head   = NULL;
367         int      agp_available = 1;
368    
369         agpdev = DRM_AGP_FIND_DEVICE();
370         if (!agpdev)
371                 agp_available = 0;
372
373         DRM_DEBUG("agp_available = %d\n", agp_available);
374
375         if (agp_available) {
376                 head = malloc(sizeof(*head), DRM_MEM_AGPLISTS,
377                     M_NOWAIT | M_ZERO);
378                 if (head == NULL)
379                         return NULL;
380                 head->agpdev = agpdev;
381                 agp_get_info(agpdev, &head->info);
382                 head->base = head->info.ai_aperture_base;
383                 head->memory = NULL;
384                 DRM_INFO("AGP at 0x%08lx %dMB\n",
385                          (long)head->info.ai_aperture_base,
386                          (int)(head->info.ai_aperture_size >> 20));
387         }
388         return head;
389 }
390
391 void *drm_agp_allocate_memory(size_t pages, u32 type)
392 {
393         device_t agpdev;
394
395         agpdev = DRM_AGP_FIND_DEVICE();
396         if (!agpdev)
397                 return NULL;
398
399         return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT);
400 }
401
402 int drm_agp_free_memory(void *handle)
403 {
404         device_t agpdev;
405
406         agpdev = DRM_AGP_FIND_DEVICE();
407         if (!agpdev || !handle)
408                 return 0;
409
410         agp_free_memory(agpdev, handle);
411         return 1;
412 }
413
414 int drm_agp_bind_memory(void *handle, off_t start)
415 {
416         device_t agpdev;
417
418         agpdev = DRM_AGP_FIND_DEVICE();
419         if (!agpdev || !handle)
420                 return EINVAL;
421
422         return agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
423 }
424
425 int drm_agp_unbind_memory(void *handle)
426 {
427         device_t agpdev;
428
429         agpdev = DRM_AGP_FIND_DEVICE();
430         if (!agpdev || !handle)
431                 return EINVAL;
432
433         return agp_unbind_memory(agpdev, handle);
434 }