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34#include <drm/drmP.h>
35#include <linux/module.h>
36#include <linux/slab.h>
37#include "drm_legacy.h"
38
39#include <asm/agp.h>
40
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52
53int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info)
54{
55 struct agp_kern_info *kern;
56
57 if (!dev->agp || !dev->agp->acquired)
58 return -EINVAL;
59
60 kern = &dev->agp->agp_info;
61 info->agp_version_major = kern->version.major;
62 info->agp_version_minor = kern->version.minor;
63 info->mode = kern->mode;
64 info->aperture_base = kern->aper_base;
65 info->aperture_size = kern->aper_size * 1024 * 1024;
66 info->memory_allowed = kern->max_memory << PAGE_SHIFT;
67 info->memory_used = kern->current_memory << PAGE_SHIFT;
68 info->id_vendor = kern->device->vendor;
69 info->id_device = kern->device->device;
70
71 return 0;
72}
73EXPORT_SYMBOL(drm_agp_info);
74
75int drm_agp_info_ioctl(struct drm_device *dev, void *data,
76 struct drm_file *file_priv)
77{
78 struct drm_agp_info *info = data;
79 int err;
80
81 err = drm_agp_info(dev, info);
82 if (err)
83 return err;
84
85 return 0;
86}
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96
97int drm_agp_acquire(struct drm_device *dev)
98{
99 if (!dev->agp)
100 return -ENODEV;
101 if (dev->agp->acquired)
102 return -EBUSY;
103 dev->agp->bridge = agp_backend_acquire(dev->pdev);
104 if (!dev->agp->bridge)
105 return -ENODEV;
106 dev->agp->acquired = 1;
107 return 0;
108}
109EXPORT_SYMBOL(drm_agp_acquire);
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122
123int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
124 struct drm_file *file_priv)
125{
126 return drm_agp_acquire((struct drm_device *) file_priv->minor->dev);
127}
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136
137int drm_agp_release(struct drm_device *dev)
138{
139 if (!dev->agp || !dev->agp->acquired)
140 return -EINVAL;
141 agp_backend_release(dev->agp->bridge);
142 dev->agp->acquired = 0;
143 return 0;
144}
145EXPORT_SYMBOL(drm_agp_release);
146
147int drm_agp_release_ioctl(struct drm_device *dev, void *data,
148 struct drm_file *file_priv)
149{
150 return drm_agp_release(dev);
151}
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162
163int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode)
164{
165 if (!dev->agp || !dev->agp->acquired)
166 return -EINVAL;
167
168 dev->agp->mode = mode.mode;
169 agp_enable(dev->agp->bridge, mode.mode);
170 dev->agp->enabled = 1;
171 return 0;
172}
173EXPORT_SYMBOL(drm_agp_enable);
174
175int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
176 struct drm_file *file_priv)
177{
178 struct drm_agp_mode *mode = data;
179
180 return drm_agp_enable(dev, *mode);
181}
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194
195int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
196{
197 struct drm_agp_mem *entry;
198 struct agp_memory *memory;
199 unsigned long pages;
200 u32 type;
201
202 if (!dev->agp || !dev->agp->acquired)
203 return -EINVAL;
204 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
205 if (!entry)
206 return -ENOMEM;
207
208 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
209 type = (u32) request->type;
210 memory = agp_allocate_memory(dev->agp->bridge, pages, type);
211 if (!memory) {
212 kfree(entry);
213 return -ENOMEM;
214 }
215
216 entry->handle = (unsigned long)memory->key + 1;
217 entry->memory = memory;
218 entry->bound = 0;
219 entry->pages = pages;
220 list_add(&entry->head, &dev->agp->memory);
221
222 request->handle = entry->handle;
223 request->physical = memory->physical;
224
225 return 0;
226}
227EXPORT_SYMBOL(drm_agp_alloc);
228
229
230int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
231 struct drm_file *file_priv)
232{
233 struct drm_agp_buffer *request = data;
234
235 return drm_agp_alloc(dev, request);
236}
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246
247static struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device *dev,
248 unsigned long handle)
249{
250 struct drm_agp_mem *entry;
251
252 list_for_each_entry(entry, &dev->agp->memory, head) {
253 if (entry->handle == handle)
254 return entry;
255 }
256 return NULL;
257}
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270
271int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
272{
273 struct drm_agp_mem *entry;
274 int ret;
275
276 if (!dev->agp || !dev->agp->acquired)
277 return -EINVAL;
278 entry = drm_agp_lookup_entry(dev, request->handle);
279 if (!entry || !entry->bound)
280 return -EINVAL;
281 ret = drm_unbind_agp(entry->memory);
282 if (ret == 0)
283 entry->bound = 0;
284 return ret;
285}
286EXPORT_SYMBOL(drm_agp_unbind);
287
288
289int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
290 struct drm_file *file_priv)
291{
292 struct drm_agp_binding *request = data;
293
294 return drm_agp_unbind(dev, request);
295}
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310int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
311{
312 struct drm_agp_mem *entry;
313 int retcode;
314 int page;
315
316 if (!dev->agp || !dev->agp->acquired)
317 return -EINVAL;
318 entry = drm_agp_lookup_entry(dev, request->handle);
319 if (!entry || entry->bound)
320 return -EINVAL;
321 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
322 retcode = drm_bind_agp(entry->memory, page);
323 if (retcode)
324 return retcode;
325 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
326 DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
327 dev->agp->base, entry->bound);
328 return 0;
329}
330EXPORT_SYMBOL(drm_agp_bind);
331
332
333int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
334 struct drm_file *file_priv)
335{
336 struct drm_agp_binding *request = data;
337
338 return drm_agp_bind(dev, request);
339}
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355int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
356{
357 struct drm_agp_mem *entry;
358
359 if (!dev->agp || !dev->agp->acquired)
360 return -EINVAL;
361 entry = drm_agp_lookup_entry(dev, request->handle);
362 if (!entry)
363 return -EINVAL;
364 if (entry->bound)
365 drm_unbind_agp(entry->memory);
366
367 list_del(&entry->head);
368
369 drm_free_agp(entry->memory, entry->pages);
370 kfree(entry);
371 return 0;
372}
373EXPORT_SYMBOL(drm_agp_free);
374
375
376int drm_agp_free_ioctl(struct drm_device *dev, void *data,
377 struct drm_file *file_priv)
378{
379 struct drm_agp_buffer *request = data;
380
381 return drm_agp_free(dev, request);
382}
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396struct drm_agp_head *drm_agp_init(struct drm_device *dev)
397{
398 struct drm_agp_head *head = NULL;
399
400 head = kzalloc(sizeof(*head), GFP_KERNEL);
401 if (!head)
402 return NULL;
403 head->bridge = agp_find_bridge(dev->pdev);
404 if (!head->bridge) {
405 head->bridge = agp_backend_acquire(dev->pdev);
406 if (!head->bridge) {
407 kfree(head);
408 return NULL;
409 }
410 agp_copy_info(head->bridge, &head->agp_info);
411 agp_backend_release(head->bridge);
412 } else {
413 agp_copy_info(head->bridge, &head->agp_info);
414 }
415 if (head->agp_info.chipset == NOT_SUPPORTED) {
416 kfree(head);
417 return NULL;
418 }
419 INIT_LIST_HEAD(&head->memory);
420 head->cant_use_aperture = head->agp_info.cant_use_aperture;
421 head->page_mask = head->agp_info.page_mask;
422 head->base = head->agp_info.aper_base;
423 return head;
424}
425
426EXPORT_SYMBOL(drm_agp_init);
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437
438void drm_legacy_agp_clear(struct drm_device *dev)
439{
440 struct drm_agp_mem *entry, *tempe;
441
442 if (!dev->agp)
443 return;
444 if (!drm_core_check_feature(dev, DRIVER_LEGACY))
445 return;
446
447 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
448 if (entry->bound)
449 drm_unbind_agp(entry->memory);
450 drm_free_agp(entry->memory, entry->pages);
451 kfree(entry);
452 }
453 INIT_LIST_HEAD(&dev->agp->memory);
454
455 if (dev->agp->acquired)
456 drm_agp_release(dev);
457
458 dev->agp->acquired = 0;
459 dev->agp->enabled = 0;
460}
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468
469struct agp_memory *
470drm_agp_bind_pages(struct drm_device *dev,
471 struct page **pages,
472 unsigned long num_pages,
473 uint32_t gtt_offset,
474 u32 type)
475{
476 struct agp_memory *mem;
477 int ret, i;
478
479 DRM_DEBUG("\n");
480
481 mem = agp_allocate_memory(dev->agp->bridge, num_pages,
482 type);
483 if (mem == NULL) {
484 DRM_ERROR("Failed to allocate memory for %ld pages\n",
485 num_pages);
486 return NULL;
487 }
488
489 for (i = 0; i < num_pages; i++)
490 mem->pages[i] = pages[i];
491 mem->page_count = num_pages;
492
493 mem->is_flushed = true;
494 ret = agp_bind_memory(mem, gtt_offset / PAGE_SIZE);
495 if (ret != 0) {
496 DRM_ERROR("Failed to bind AGP memory: %d\n", ret);
497 agp_free_memory(mem);
498 return NULL;
499 }
500
501 return mem;
502}
503EXPORT_SYMBOL(drm_agp_bind_pages);
504