agp/drm: Adapt according to the recent pci code change
[dragonfly.git] / sys / dev / drm / 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 /** @file drm_agpsupport.c
32  * Support code for tying the kernel AGP support to DRM drivers and
33  * the DRM's AGP ioctls.
34  */
35
36 #include "dev/drm/drmP.h"
37
38 #include <dev/agp/agpreg.h>
39 #include <bus/pci/pcireg.h>
40
41 /* Returns 1 if AGP or 0 if not. */
42 static int
43 drm_device_find_capability(struct drm_device *dev, int cap)
44 {
45         return (pci_find_extcap(dev->device, cap, NULL) == 0);
46 }
47
48 int drm_device_is_agp(struct drm_device *dev)
49 {
50         if (dev->driver->device_is_agp != NULL) {
51                 int ret;
52
53                 /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely
54                  * AGP, 2 = fall back to PCI capability
55                  */
56                 ret = (*dev->driver->device_is_agp)(dev);
57                 if (ret != DRM_MIGHT_BE_AGP)
58                         return ret;
59         }
60
61         return (drm_device_find_capability(dev, PCIY_AGP));
62 }
63
64 int drm_device_is_pcie(struct drm_device *dev)
65 {
66         return (drm_device_find_capability(dev, PCIY_EXPRESS));
67 }
68
69 int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info)
70 {
71         struct agp_info *kern;
72
73         if (!dev->agp || !dev->agp->acquired)
74                 return EINVAL;
75
76         kern                   = &dev->agp->info;
77         agp_get_info(dev->agp->agpdev, kern);
78         info->agp_version_major = 1;
79         info->agp_version_minor = 0;
80         info->mode              = kern->ai_mode;
81         info->aperture_base     = kern->ai_aperture_base;
82         info->aperture_size     = kern->ai_aperture_size;
83         info->memory_allowed    = kern->ai_memory_allowed;
84         info->memory_used       = kern->ai_memory_used;
85         info->id_vendor         = kern->ai_devid & 0xffff;
86         info->id_device         = kern->ai_devid >> 16;
87
88         return 0;
89 }
90
91 int drm_agp_info_ioctl(struct drm_device *dev, void *data,
92                        struct drm_file *file_priv)
93 {
94         int err;
95         struct drm_agp_info info;
96
97         err = drm_agp_info(dev, &info);
98         if (err != 0)
99                 return err;
100
101         *(struct drm_agp_info *) data = info;
102         return 0;
103 }
104
105 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
106                           struct drm_file *file_priv)
107 {
108
109         return drm_agp_acquire(dev);
110 }
111
112 int drm_agp_acquire(struct drm_device *dev)
113 {
114         int retcode;
115
116         if (!dev->agp || dev->agp->acquired)
117                 return EINVAL;
118
119         retcode = agp_acquire(dev->agp->agpdev);
120         if (retcode)
121                 return retcode;
122
123         dev->agp->acquired = 1;
124         return 0;
125 }
126
127 int drm_agp_release_ioctl(struct drm_device *dev, void *data,
128                           struct drm_file *file_priv)
129 {
130
131         return drm_agp_release(dev);
132 }
133
134 int drm_agp_release(struct drm_device * dev)
135 {
136         if (!dev->agp || !dev->agp->acquired)
137                 return EINVAL;
138         agp_release(dev->agp->agpdev);
139         dev->agp->acquired = 0;
140         return 0;
141 }
142
143 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode)
144 {
145
146         if (!dev->agp || !dev->agp->acquired)
147                 return EINVAL;
148         
149         dev->agp->mode    = mode.mode;
150         agp_enable(dev->agp->agpdev, mode.mode);
151         dev->agp->enabled = 1;
152         return 0;
153 }
154
155 int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
156                          struct drm_file *file_priv)
157 {
158         struct drm_agp_mode mode;
159
160         mode = *(struct drm_agp_mode *) data;
161
162         return drm_agp_enable(dev, mode);
163 }
164
165 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
166 {
167         drm_agp_mem_t    *entry;
168         void             *handle;
169         unsigned long    pages;
170         u_int32_t        type;
171         struct agp_memory_info info;
172
173         if (!dev->agp || !dev->agp->acquired)
174                 return EINVAL;
175
176         entry = malloc(sizeof(*entry), DRM_MEM_AGPLISTS, M_NOWAIT | M_ZERO);
177         if (entry == NULL)
178                 return ENOMEM;
179
180         pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
181         type = (u_int32_t) request->type;
182
183         DRM_UNLOCK();
184         handle = drm_agp_allocate_memory(pages, type);
185         DRM_LOCK();
186         if (handle == NULL) {
187                 free(entry, DRM_MEM_AGPLISTS);
188                 return ENOMEM;
189         }
190         
191         entry->handle    = handle;
192         entry->bound     = 0;
193         entry->pages     = pages;
194         entry->prev      = NULL;
195         entry->next      = dev->agp->memory;
196         if (dev->agp->memory)
197                 dev->agp->memory->prev = entry;
198         dev->agp->memory = entry;
199
200         agp_memory_info(dev->agp->agpdev, entry->handle, &info);
201
202         request->handle   = (unsigned long) entry->handle;
203         request->physical = info.ami_physical;
204
205         return 0;
206 }
207
208 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
209                         struct drm_file *file_priv)
210 {
211         struct drm_agp_buffer request;
212         int retcode;
213
214         request = *(struct drm_agp_buffer *) data;
215
216         DRM_LOCK();
217         retcode = drm_agp_alloc(dev, &request);
218         DRM_UNLOCK();
219
220         *(struct drm_agp_buffer *) data = request;
221
222         return retcode;
223 }
224
225 static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev,
226                                             void *handle)
227 {
228         drm_agp_mem_t *entry;
229
230         for (entry = dev->agp->memory; entry; entry = entry->next) {
231                 if (entry->handle == handle) return entry;
232         }
233         return NULL;
234 }
235
236 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
237 {
238         drm_agp_mem_t     *entry;
239         int retcode;
240
241         if (!dev->agp || !dev->agp->acquired)
242                 return EINVAL;
243
244         entry = drm_agp_lookup_entry(dev, (void *)request->handle);
245         if (entry == NULL || !entry->bound)
246                 return EINVAL;
247
248         DRM_UNLOCK();
249         retcode = drm_agp_unbind_memory(entry->handle);
250         DRM_LOCK();
251
252         if (retcode == 0)
253                 entry->bound = 0;
254
255         return retcode;
256 }
257
258 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
259                          struct drm_file *file_priv)
260 {
261         struct drm_agp_binding request;
262         int retcode;
263
264         request = *(struct drm_agp_binding *) data;
265
266         DRM_LOCK();
267         retcode = drm_agp_unbind(dev, &request);
268         DRM_UNLOCK();
269
270         return retcode;
271 }
272
273 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
274 {
275         drm_agp_mem_t     *entry;
276         int               retcode;
277         int               page;
278         
279         if (!dev->agp || !dev->agp->acquired)
280                 return EINVAL;
281
282         DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE);
283
284         entry = drm_agp_lookup_entry(dev, (void *)request->handle);
285         if (entry == NULL || entry->bound)
286                 return EINVAL;
287
288         page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
289
290         DRM_UNLOCK();
291         retcode = drm_agp_bind_memory(entry->handle, page);
292         DRM_LOCK();
293         if (retcode == 0)
294                 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
295
296         return retcode;
297 }
298
299 int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
300                        struct drm_file *file_priv)
301 {
302         struct drm_agp_binding request;
303         int retcode;
304
305         request = *(struct drm_agp_binding *) data;
306
307         DRM_LOCK();
308         retcode = drm_agp_bind(dev, &request);
309         DRM_UNLOCK();
310
311         return retcode;
312 }
313
314 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
315 {
316         drm_agp_mem_t    *entry;
317         
318         if (!dev->agp || !dev->agp->acquired)
319                 return EINVAL;
320
321         entry = drm_agp_lookup_entry(dev, (void*)request->handle);
322         if (entry == NULL)
323                 return EINVAL;
324    
325         if (entry->prev)
326                 entry->prev->next = entry->next;
327         else
328                 dev->agp->memory  = entry->next;
329         if (entry->next)
330                 entry->next->prev = entry->prev;
331
332         DRM_UNLOCK();
333         if (entry->bound)
334                 drm_agp_unbind_memory(entry->handle);
335         drm_agp_free_memory(entry->handle);
336         DRM_LOCK();
337
338         free(entry, DRM_MEM_AGPLISTS);
339
340         return 0;
341
342 }
343
344 int drm_agp_free_ioctl(struct drm_device *dev, void *data,
345                        struct drm_file *file_priv)
346 {
347         struct drm_agp_buffer request;
348         int retcode;
349
350         request = *(struct drm_agp_buffer *) data;
351
352         DRM_LOCK();
353         retcode = drm_agp_free(dev, &request);
354         DRM_UNLOCK();
355
356         return retcode;
357 }
358
359 drm_agp_head_t *drm_agp_init(void)
360 {
361         device_t agpdev;
362         drm_agp_head_t *head   = NULL;
363         int      agp_available = 1;
364    
365         agpdev = DRM_AGP_FIND_DEVICE();
366         if (!agpdev)
367                 agp_available = 0;
368
369         DRM_DEBUG("agp_available = %d\n", agp_available);
370
371         if (agp_available) {
372                 head = malloc(sizeof(*head), DRM_MEM_AGPLISTS,
373                     M_NOWAIT | M_ZERO);
374                 if (head == NULL)
375                         return NULL;
376                 head->agpdev = agpdev;
377                 agp_get_info(agpdev, &head->info);
378                 head->base = head->info.ai_aperture_base;
379                 head->memory = NULL;
380                 DRM_INFO("AGP at 0x%08lx %dMB\n",
381                          (long)head->info.ai_aperture_base,
382                          (int)(head->info.ai_aperture_size >> 20));
383         }
384         return head;
385 }
386
387 void *drm_agp_allocate_memory(size_t pages, u32 type)
388 {
389         device_t agpdev;
390
391         agpdev = DRM_AGP_FIND_DEVICE();
392         if (!agpdev)
393                 return NULL;
394
395         return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT);
396 }
397
398 int drm_agp_free_memory(void *handle)
399 {
400         device_t agpdev;
401
402         agpdev = DRM_AGP_FIND_DEVICE();
403         if (!agpdev || !handle)
404                 return 0;
405
406         agp_free_memory(agpdev, handle);
407         return 1;
408 }
409
410 int drm_agp_bind_memory(void *handle, off_t start)
411 {
412         device_t agpdev;
413
414         agpdev = DRM_AGP_FIND_DEVICE();
415         if (!agpdev || !handle)
416                 return EINVAL;
417
418         return agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
419 }
420
421 int drm_agp_unbind_memory(void *handle)
422 {
423         device_t agpdev;
424
425         agpdev = DRM_AGP_FIND_DEVICE();
426         if (!agpdev || !handle)
427                 return EINVAL;
428
429         return agp_unbind_memory(agpdev, handle);
430 }