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committed 1e55a53a28dx
* intact so it can still be used. It is safe to call this if AGP is disabled or/** * \file drm_agpsupport.c * DRM support for AGP/GART backend * * \author Rickard E. (Rik) Faith <faith@valinux.com> * \author Gareth Hughes <gareth@valinux.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. *//** * Get AGP information. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg pointer to a (output) drm_agp_info structure. * \return zero on success or a negative number on failure. * * Verifies the AGP device has been initialized and acquired and fills in the * drm_agp_info structure with the information in drm_agp_head::agp_info. */int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info){ struct agp_kern_info *kern; if (!dev->agp || !dev->agp->acquired) 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; return 0;}EXPORT_SYMBOL(drm_agp_info);int drm_agp_info_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv){ struct drm_agp_info *info = data; int err; err = drm_agp_info(dev, info); if (err) return err; return 0;}/** * Acquire the AGP device. * * \param dev DRM device that is to acquire AGP. * \return zero on success or a negative number on failure.