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.
36 #include "dev/drm/drmP.h"
38 #include <dev/agp/agpreg.h>
39 #include <bus/pci/pcireg.h>
41 /* Returns 1 if AGP or 0 if not. */
43 drm_device_find_capability(struct drm_device *dev, int cap)
45 return (pci_find_extcap(dev->device, cap, NULL) == 0);
48 int drm_device_is_agp(struct drm_device *dev)
50 if (dev->driver->device_is_agp != NULL) {
53 /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely
54 * AGP, 2 = fall back to PCI capability
56 ret = (*dev->driver->device_is_agp)(dev);
57 if (ret != DRM_MIGHT_BE_AGP)
61 return (drm_device_find_capability(dev, PCIY_AGP));
64 int drm_device_is_pcie(struct drm_device *dev)
66 return (drm_device_find_capability(dev, PCIY_EXPRESS));
69 int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info)
71 struct agp_info *kern;
73 if (!dev->agp || !dev->agp->acquired)
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;
91 int drm_agp_info_ioctl(struct drm_device *dev, void *data,
92 struct drm_file *file_priv)
95 struct drm_agp_info info;
97 err = drm_agp_info(dev, &info);
101 *(struct drm_agp_info *) data = info;
105 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
106 struct drm_file *file_priv)
109 return drm_agp_acquire(dev);
112 int drm_agp_acquire(struct drm_device *dev)
116 if (!dev->agp || dev->agp->acquired)
119 retcode = agp_acquire(dev->agp->agpdev);
123 dev->agp->acquired = 1;
127 int drm_agp_release_ioctl(struct drm_device *dev, void *data,
128 struct drm_file *file_priv)
131 return drm_agp_release(dev);
134 int drm_agp_release(struct drm_device * dev)
136 if (!dev->agp || !dev->agp->acquired)
138 agp_release(dev->agp->agpdev);
139 dev->agp->acquired = 0;
143 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode)
146 if (!dev->agp || !dev->agp->acquired)
149 dev->agp->mode = mode.mode;
150 agp_enable(dev->agp->agpdev, mode.mode);
151 dev->agp->enabled = 1;
155 int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
156 struct drm_file *file_priv)
158 struct drm_agp_mode mode;
160 mode = *(struct drm_agp_mode *) data;
162 return drm_agp_enable(dev, mode);
165 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request)
167 drm_agp_mem_t *entry;
171 struct agp_memory_info info;
173 if (!dev->agp || !dev->agp->acquired)
176 entry = malloc(sizeof(*entry), DRM_MEM_AGPLISTS, M_NOWAIT | M_ZERO);
180 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
181 type = (u_int32_t) request->type;
184 handle = drm_agp_allocate_memory(pages, type);
186 if (handle == NULL) {
187 free(entry, DRM_MEM_AGPLISTS);
191 entry->handle = handle;
193 entry->pages = pages;
195 entry->next = dev->agp->memory;
196 if (dev->agp->memory)
197 dev->agp->memory->prev = entry;
198 dev->agp->memory = entry;
200 agp_memory_info(dev->agp->agpdev, entry->handle, &info);
202 request->handle = (unsigned long) entry->handle;
203 request->physical = info.ami_physical;
208 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
209 struct drm_file *file_priv)
211 struct drm_agp_buffer request;
214 request = *(struct drm_agp_buffer *) data;
217 retcode = drm_agp_alloc(dev, &request);
220 *(struct drm_agp_buffer *) data = request;
225 static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev,
228 drm_agp_mem_t *entry;
230 for (entry = dev->agp->memory; entry; entry = entry->next) {
231 if (entry->handle == handle) return entry;
236 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request)
238 drm_agp_mem_t *entry;
241 if (!dev->agp || !dev->agp->acquired)
244 entry = drm_agp_lookup_entry(dev, (void *)request->handle);
245 if (entry == NULL || !entry->bound)
249 retcode = drm_agp_unbind_memory(entry->handle);
258 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
259 struct drm_file *file_priv)
261 struct drm_agp_binding request;
264 request = *(struct drm_agp_binding *) data;
267 retcode = drm_agp_unbind(dev, &request);
273 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request)
275 drm_agp_mem_t *entry;
279 if (!dev->agp || !dev->agp->acquired)
282 DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE);
284 entry = drm_agp_lookup_entry(dev, (void *)request->handle);
285 if (entry == NULL || entry->bound)
288 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
291 retcode = drm_agp_bind_memory(entry->handle, page);
294 entry->bound = dev->agp->base + (page << PAGE_SHIFT);
299 int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
300 struct drm_file *file_priv)
302 struct drm_agp_binding request;
305 request = *(struct drm_agp_binding *) data;
308 retcode = drm_agp_bind(dev, &request);
314 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
316 drm_agp_mem_t *entry;
318 if (!dev->agp || !dev->agp->acquired)
321 entry = drm_agp_lookup_entry(dev, (void*)request->handle);
326 entry->prev->next = entry->next;
328 dev->agp->memory = entry->next;
330 entry->next->prev = entry->prev;
334 drm_agp_unbind_memory(entry->handle);
335 drm_agp_free_memory(entry->handle);
338 free(entry, DRM_MEM_AGPLISTS);
344 int drm_agp_free_ioctl(struct drm_device *dev, void *data,
345 struct drm_file *file_priv)
347 struct drm_agp_buffer request;
350 request = *(struct drm_agp_buffer *) data;
353 retcode = drm_agp_free(dev, &request);
359 drm_agp_head_t *drm_agp_init(void)
362 drm_agp_head_t *head = NULL;
363 int agp_available = 1;
365 agpdev = DRM_AGP_FIND_DEVICE();
369 DRM_DEBUG("agp_available = %d\n", agp_available);
372 head = malloc(sizeof(*head), DRM_MEM_AGPLISTS,
376 head->agpdev = agpdev;
377 agp_get_info(agpdev, &head->info);
378 head->base = head->info.ai_aperture_base;
380 DRM_INFO("AGP at 0x%08lx %dMB\n",
381 (long)head->info.ai_aperture_base,
382 (int)(head->info.ai_aperture_size >> 20));
387 void *drm_agp_allocate_memory(size_t pages, u32 type)
391 agpdev = DRM_AGP_FIND_DEVICE();
395 return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT);
398 int drm_agp_free_memory(void *handle)
402 agpdev = DRM_AGP_FIND_DEVICE();
403 if (!agpdev || !handle)
406 agp_free_memory(agpdev, handle);
410 int drm_agp_bind_memory(void *handle, off_t start)
414 agpdev = DRM_AGP_FIND_DEVICE();
415 if (!agpdev || !handle)
418 return agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
421 int drm_agp_unbind_memory(void *handle)
425 agpdev = DRM_AGP_FIND_DEVICE();
426 if (!agpdev || !handle)
429 return agp_unbind_memory(agpdev, handle);