| /* drm_agpsupport.h -- DRM support for AGP/GART backend -*- linux-c -*- |
| * Created: Mon Dec 13 09:56:45 1999 by faith@precisioninsight.com |
| * |
| * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. |
| * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Author: |
| * Rickard E. (Rik) Faith <faith@valinux.com> |
| * Gareth Hughes <gareth@valinux.com> |
| */ |
| |
| #include "drmP.h" |
| #include <linux/module.h> |
| |
| #if __REALLY_HAVE_AGP |
| |
| #define DRM_AGP_GET (drm_agp_t *)inter_module_get("drm_agp") |
| #define DRM_AGP_PUT inter_module_put("drm_agp") |
| |
| static const drm_agp_t *drm_agp = NULL; |
| |
| int DRM(agp_info)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| agp_kern_info *kern; |
| drm_agp_info_t info; |
| |
| if (!dev->agp || !dev->agp->acquired || !drm_agp->copy_info) |
| return -EINVAL; |
| |
| kern = &dev->agp->agp_info; |
| info.agp_version_major = kern->version.major; |
| info.agp_version_minor = kern->version.minor; |
| info.mode = kern->mode; |
| info.aperture_base = kern->aper_base; |
| info.aperture_size = kern->aper_size * 1024 * 1024; |
| info.memory_allowed = kern->max_memory << PAGE_SHIFT; |
| info.memory_used = kern->current_memory << PAGE_SHIFT; |
| info.id_vendor = kern->device->vendor; |
| info.id_device = kern->device->device; |
| |
| if (copy_to_user((drm_agp_info_t *)arg, &info, sizeof(info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| int DRM(agp_acquire)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| int retcode; |
| |
| if (!dev->agp) |
| return -ENODEV; |
| if (dev->agp->acquired) |
| return -EBUSY; |
| if(!drm_agp->acquire) |
| return -EINVAL; |
| if ((retcode = drm_agp->acquire())) |
| return retcode; |
| dev->agp->acquired = 1; |
| return 0; |
| } |
| |
| int DRM(agp_release)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| |
| if (!dev->agp || !dev->agp->acquired || !drm_agp->release) |
| return -EINVAL; |
| drm_agp->release(); |
| dev->agp->acquired = 0; |
| return 0; |
| |
| } |
| |
| void DRM(agp_do_release)(void) |
| { |
| if (drm_agp->release) drm_agp->release(); |
| } |
| |
| int DRM(agp_enable)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| drm_agp_mode_t mode; |
| |
| if (!dev->agp || !dev->agp->acquired || !drm_agp->enable) |
| return -EINVAL; |
| |
| if (copy_from_user(&mode, (drm_agp_mode_t *)arg, sizeof(mode))) |
| return -EFAULT; |
| |
| dev->agp->mode = mode.mode; |
| drm_agp->enable(mode.mode); |
| dev->agp->base = dev->agp->agp_info.aper_base; |
| dev->agp->enabled = 1; |
| return 0; |
| } |
| |
| int DRM(agp_alloc)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| drm_agp_buffer_t request; |
| drm_agp_mem_t *entry; |
| agp_memory *memory; |
| unsigned long pages; |
| u32 type; |
| |
| if (!dev->agp || !dev->agp->acquired) return -EINVAL; |
| if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request))) |
| return -EFAULT; |
| if (!(entry = DRM(alloc)(sizeof(*entry), DRM_MEM_AGPLISTS))) |
| return -ENOMEM; |
| |
| memset(entry, 0, sizeof(*entry)); |
| |
| pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE; |
| type = (u32) request.type; |
| |
| if (!(memory = DRM(alloc_agp)(pages, type))) { |
| DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
| return -ENOMEM; |
| } |
| |
| entry->handle = (unsigned long)memory->memory; |
| entry->memory = memory; |
| entry->bound = 0; |
| entry->pages = pages; |
| entry->prev = NULL; |
| entry->next = dev->agp->memory; |
| if (dev->agp->memory) dev->agp->memory->prev = entry; |
| dev->agp->memory = entry; |
| |
| request.handle = entry->handle; |
| request.physical = memory->physical; |
| |
| if (copy_to_user((drm_agp_buffer_t *)arg, &request, sizeof(request))) { |
| dev->agp->memory = entry->next; |
| dev->agp->memory->prev = NULL; |
| DRM(free_agp)(memory, pages); |
| DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
| return -EFAULT; |
| } |
| return 0; |
| } |
| |
| static drm_agp_mem_t *DRM(agp_lookup_entry)(drm_device_t *dev, |
| unsigned long handle) |
| { |
| drm_agp_mem_t *entry; |
| |
| for (entry = dev->agp->memory; entry; entry = entry->next) { |
| if (entry->handle == handle) return entry; |
| } |
| return NULL; |
| } |
| |
| int DRM(agp_unbind)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| drm_agp_binding_t request; |
| drm_agp_mem_t *entry; |
| |
| if (!dev->agp || !dev->agp->acquired) return -EINVAL; |
| if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request))) |
| return -EFAULT; |
| if (!(entry = DRM(agp_lookup_entry)(dev, request.handle))) |
| return -EINVAL; |
| if (!entry->bound) return -EINVAL; |
| return DRM(unbind_agp)(entry->memory); |
| } |
| |
| int DRM(agp_bind)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| drm_agp_binding_t request; |
| drm_agp_mem_t *entry; |
| int retcode; |
| int page; |
| |
| if (!dev->agp || !dev->agp->acquired || !drm_agp->bind_memory) |
| return -EINVAL; |
| if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request))) |
| return -EFAULT; |
| if (!(entry = DRM(agp_lookup_entry)(dev, request.handle))) |
| return -EINVAL; |
| if (entry->bound) return -EINVAL; |
| page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE; |
| if ((retcode = DRM(bind_agp)(entry->memory, page))) return retcode; |
| entry->bound = dev->agp->base + (page << PAGE_SHIFT); |
| DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n", |
| dev->agp->base, entry->bound); |
| return 0; |
| } |
| |
| int DRM(agp_free)(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->dev; |
| drm_agp_buffer_t request; |
| drm_agp_mem_t *entry; |
| |
| if (!dev->agp || !dev->agp->acquired) return -EINVAL; |
| if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request))) |
| return -EFAULT; |
| if (!(entry = DRM(agp_lookup_entry)(dev, request.handle))) |
| return -EINVAL; |
| if (entry->bound) DRM(unbind_agp)(entry->memory); |
| |
| if (entry->prev) entry->prev->next = entry->next; |
| else dev->agp->memory = entry->next; |
| if (entry->next) entry->next->prev = entry->prev; |
| DRM(free_agp)(entry->memory, entry->pages); |
| DRM(free)(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
| return 0; |
| } |
| |
| drm_agp_head_t *DRM(agp_init)(void) |
| { |
| drm_agp_head_t *head = NULL; |
| |
| drm_agp = DRM_AGP_GET; |
| if (drm_agp) { |
| if (!(head = DRM(alloc)(sizeof(*head), DRM_MEM_AGPLISTS))) |
| return NULL; |
| memset((void *)head, 0, sizeof(*head)); |
| drm_agp->copy_info(&head->agp_info); |
| if (head->agp_info.chipset == NOT_SUPPORTED) { |
| DRM(free)(head, sizeof(*head), DRM_MEM_AGPLISTS); |
| return NULL; |
| } |
| head->memory = NULL; |
| |
| head->cant_use_aperture = head->agp_info.cant_use_aperture; |
| head->page_mask = head->agp_info.page_mask; |
| |
| DRM_INFO("AGP %d.%d Aperture @ 0x%08lx %ZuMB\n", |
| head->agp_info.version.major, |
| head->agp_info.version.minor, |
| head->agp_info.aper_base, |
| head->agp_info.aper_size); |
| } |
| return head; |
| } |
| |
| void DRM(agp_uninit)(void) |
| { |
| DRM_AGP_PUT; |
| drm_agp = NULL; |
| } |
| |
| agp_memory *DRM(agp_allocate_memory)(size_t pages, u32 type) |
| { |
| if (!drm_agp->allocate_memory) return NULL; |
| return drm_agp->allocate_memory(pages, type); |
| } |
| |
| int DRM(agp_free_memory)(agp_memory *handle) |
| { |
| if (!handle || !drm_agp->free_memory) return 0; |
| drm_agp->free_memory(handle); |
| return 1; |
| } |
| |
| int DRM(agp_bind_memory)(agp_memory *handle, off_t start) |
| { |
| if (!handle || !drm_agp->bind_memory) return -EINVAL; |
| return drm_agp->bind_memory(handle, start); |
| } |
| |
| int DRM(agp_unbind_memory)(agp_memory *handle) |
| { |
| if (!handle || !drm_agp->unbind_memory) return -EINVAL; |
| return drm_agp->unbind_memory(handle); |
| } |
| |
| #endif /* __REALLY_HAVE_AGP */ |