2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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:
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
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.
26 * Rickard E. (Rik) Faith <faith@valinux.com>
27 * Gareth Hughes <gareth@valinux.com>
31 /** @file drm_agpsupport.c
32 * Support code for tying the kernel AGP support to DRM drivers and
33 * the DRM's AGP ioctls.
38 #if __FreeBSD_version >= 800004
39 #include <dev/agp/agpreg.h>
40 #else /* __FreeBSD_version >= 800004 */
41 #include <pci/agpreg.h>
42 #endif /* __FreeBSD_version >= 800004 */
43 #include <dev/pci/pcireg.h>
45 /* Returns 1 if AGP or 0 if not. */
47 drm_device_find_capability(struct drm_device *dev, int cap)
49 #if __FreeBSD_version >= 602102
51 return (pci_find_extcap(dev->device, cap, NULL) == 0);
53 /* Code taken from agp.c. IWBNI that was a public interface. */
58 * Check the CAP_LIST bit of the PCI status register first.
60 status = pci_read_config(dev->device, PCIR_STATUS, 2);
65 * Traverse the capabilities list.
67 for (ptr = pci_read_config(dev->device, AGP_CAPPTR, 1);
70 u_int32_t capid = pci_read_config(dev->device, ptr, 4);
71 next = AGP_CAPID_GET_NEXT_PTR(capid);
74 * If this capability entry ID is cap, then we are done.
76 if (AGP_CAPID_GET_CAP_ID(capid) == cap)
84 int drm_device_is_agp(struct drm_device *dev)
86 if (dev->driver->device_is_agp != NULL) {
89 /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely
90 * AGP, 2 = fall back to PCI capability
92 ret = (*dev->driver->device_is_agp)(dev);
93 if (ret != DRM_MIGHT_BE_AGP)
97 return (drm_device_find_capability(dev, PCIY_AGP));
100 int drm_device_is_pcie(struct drm_device *dev)
102 return (drm_device_find_capability(dev, PCIY_EXPRESS));
105 int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info)
107 struct agp_info *kern;
109 if (!dev->agp || !dev->agp->acquired)
112 kern = &dev->agp->info;
113 agp_get_info(dev->agp->agpdev, kern);
114 info->agp_version_major = 1;
115 info->agp_version_minor = 0;
116 info->mode = kern->ai_mode;
117 info->aperture_base = kern->ai_aperture_base;
118 info->aperture_size = kern->ai_aperture_size;
119 info->memory_allowed = kern->ai_memory_allowed;
120 info->memory_used = kern->ai_memory_used;
121 info->id_vendor = kern->ai_devid & 0xffff;
122 info->id_device = kern->ai_devid >> 16;
127 int drm_agp_info_ioctl(struct drm_device *dev, void *data,
128 struct drm_file *file_priv)
131 struct drm_agp_info info;
133 err = drm_agp_info(dev, &info);
137 *(struct drm_agp_info *) data = info;
141 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
142 struct drm_file *file_priv)
145 return drm_agp_acquire(dev);
148 int drm_agp_acquire(struct drm_device *dev)
152 if (!dev->agp || dev->agp->acquired)
155 retcode = agp_acquire(dev->agp->agpdev);
159 dev->agp->acquired = 1;
163 int drm_agp_release_ioctl(struct drm_device *dev, void *data,
164 struct drm_file *file_priv)
167 return drm_agp_release(dev);
170 int drm_agp_release(struct drm_device * dev)
172 if (!dev->agp || !dev->agp->acquired)
174 agp_release(dev->agp->agpdev);
175 dev->agp->acquired = 0;
179 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode)
182 if (!dev->agp || !dev->agp->acquired)
185 dev->agp->mode = mode.mode;
186 agp_enable(dev->agp->agpdev, mode.mode);
187 dev->agp->enabled = 1;
191 int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
192 struct drm_file *file_priv)
194 struct drm_agp_mode mode;
196 mode = *(struct drm_agp_mode *) data;
198 return drm_agp_enable(dev, mode);
201 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
203 drm_agp_mem_t *entry;
207 struct agp_memory_info info;
209 if (!dev->agp || !dev->agp->acquired)
212 entry = malloc(sizeof(*entry), DRM_MEM_AGPLISTS, M_NOWAIT | M_ZERO);
216 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
217 type = (u_int32_t) request->type;
220 handle = drm_agp_allocate_memory(pages, type);
222 if (handle == NULL) {
223 free(entry, DRM_MEM_AGPLISTS);
227 entry->handle = handle;
229 entry->pages = pages;
231 entry->next = dev->agp->memory;
232 if (dev->agp->memory)
233 dev->agp->memory->prev = entry;
234 dev->agp->memory = entry;
236 agp_memory_info(dev->agp->agpdev, entry->handle, &info);
238 request->handle = (unsigned long) entry->handle;
239 request->physical = info.ami_physical;
244 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
245 struct drm_file *file_priv)
247 struct drm_agp_buffer request;
250 request = *(struct drm_agp_buffer *) data;
253 retcode = drm_agp_alloc(dev, &request);
256 *(struct drm_agp_buffer *) data = request;
261 static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev,
264 drm_agp_mem_t *entry;
266 for (entry = dev->agp->memory; entry; entry = entry->next) {
267 if (entry->handle == handle) return entry;
272 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
274 drm_agp_mem_t *entry;
277 if (!dev->agp || !dev->agp->acquired)
280 entry = drm_agp_lookup_entry(dev, (void *)request->handle);
281 if (entry == NULL || !entry->bound)
285 retcode = drm_agp_unbind_memory(entry->handle);
294 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
295 struct drm_file *file_priv)
297 struct drm_agp_binding request;
300 request = *(struct drm_agp_binding *) data;
303 retcode = drm_agp_unbind(dev, &request);
309 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
311 drm_agp_mem_t *entry;
315 if (!dev->agp || !dev->agp->acquired)
318 DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE);
320 entry = drm_agp_lookup_entry(dev, (void *)request->handle);
321 if (entry == NULL || entry->bound)
324 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
327 retcode = drm_agp_bind_memory(entry->handle, page);
330 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
335 int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
336 struct drm_file *file_priv)
338 struct drm_agp_binding request;
341 request = *(struct drm_agp_binding *) data;
344 retcode = drm_agp_bind(dev, &request);
350 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
352 drm_agp_mem_t *entry;
354 if (!dev->agp || !dev->agp->acquired)
357 entry = drm_agp_lookup_entry(dev, (void*)request->handle);
362 entry->prev->next = entry->next;
364 dev->agp->memory = entry->next;
366 entry->next->prev = entry->prev;
370 drm_agp_unbind_memory(entry->handle);
371 drm_agp_free_memory(entry->handle);
374 free(entry, DRM_MEM_AGPLISTS);
380 int drm_agp_free_ioctl(struct drm_device *dev, void *data,
381 struct drm_file *file_priv)
383 struct drm_agp_buffer request;
386 request = *(struct drm_agp_buffer *) data;
389 retcode = drm_agp_free(dev, &request);
395 drm_agp_head_t *drm_agp_init(void)
398 drm_agp_head_t *head = NULL;
399 int agp_available = 1;
401 agpdev = DRM_AGP_FIND_DEVICE();
405 DRM_DEBUG("agp_available = %d\n", agp_available);
408 head = malloc(sizeof(*head), DRM_MEM_AGPLISTS,
412 head->agpdev = agpdev;
413 agp_get_info(agpdev, &head->info);
414 head->base = head->info.ai_aperture_base;
416 DRM_INFO("AGP at 0x%08lx %dMB\n",
417 (long)head->info.ai_aperture_base,
418 (int)(head->info.ai_aperture_size >> 20));
423 void *drm_agp_allocate_memory(size_t pages, u32 type)
427 agpdev = DRM_AGP_FIND_DEVICE();
431 return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT);
434 int drm_agp_free_memory(void *handle)
438 agpdev = DRM_AGP_FIND_DEVICE();
439 if (!agpdev || !handle)
442 agp_free_memory(agpdev, handle);
446 int drm_agp_bind_memory(void *handle, off_t start)
450 agpdev = DRM_AGP_FIND_DEVICE();
451 if (!agpdev || !handle)
454 return agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
457 int drm_agp_unbind_memory(void *handle)
461 agpdev = DRM_AGP_FIND_DEVICE();
462 if (!agpdev || !handle)
465 return agp_unbind_memory(agpdev, handle);