FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drm_memory.c

     /**
      * \file drm_memory.c
      * Memory management wrappers for DRM
      *
      * \author Rickard E. (Rik) Faith <faith@valinux.com>
      * \author Gareth Hughes <gareth@valinux.com>
      */
     
     /*
     * Created: Thu Feb  4 14:00:34 1999 by faith@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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <dev/drm2/drmP.h>
    
    #define vunmap(handle)
    
    #if __OS_HAS_AGP
    static void *agp_remap(unsigned long offset, unsigned long size,
                           struct drm_device * dev)
    {
            /*
             * FIXME Linux<->FreeBSD: Not implemented. This is never called
             * on FreeBSD anyway, because drm_agp_mem->cant_use_aperture is
             * set to 0.
             */
            return NULL;
    }
    
    /** Wrapper around agp_free_memory() */
    void drm_free_agp(DRM_AGP_MEM * handle, int pages)
    {
            device_t agpdev;
    
            agpdev = agp_find_device();
            if (!agpdev || !handle)
                    return;
    
            agp_free_memory(agpdev, handle);
    }
    EXPORT_SYMBOL(drm_free_agp);
    
    /** Wrapper around agp_bind_memory() */
    int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
    {
            device_t agpdev;
    
            agpdev = agp_find_device();
            if (!agpdev || !handle)
                    return -EINVAL;
    
            return -agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
    }
    
    /** Wrapper around agp_unbind_memory() */
    int drm_unbind_agp(DRM_AGP_MEM * handle)
    {
            device_t agpdev;
    
            agpdev = agp_find_device();
            if (!agpdev || !handle)
                    return -EINVAL;
    
            return -agp_unbind_memory(agpdev, handle);
    }
    EXPORT_SYMBOL(drm_unbind_agp);
    
    #else  /*  __OS_HAS_AGP  */
    static inline void *agp_remap(unsigned long offset, unsigned long size,
                                  struct drm_device * dev)
    {
            return NULL;
    }
    
   #endif                          /* agp */
   
   void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev)
   {
           if (drm_core_has_AGP(dev) &&
               dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
                   map->handle = agp_remap(map->offset, map->size, dev);
           else
                   map->handle = pmap_mapdev(map->offset, map->size);
   }
   EXPORT_SYMBOL(drm_core_ioremap);
   
   void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev)
   {
           if (drm_core_has_AGP(dev) &&
               dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
                   map->handle = agp_remap(map->offset, map->size, dev);
           else
                   map->handle = pmap_mapdev_attr(map->offset, map->size,
                       VM_MEMATTR_WRITE_COMBINING);
   }
   EXPORT_SYMBOL(drm_core_ioremap_wc);
   
   void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
   {
           if (!map->handle || !map->size)
                   return;
   
           if (drm_core_has_AGP(dev) &&
               dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
                   vunmap(map->handle);
           else
                   pmap_unmapdev(map->handle, map->size);
   }
   EXPORT_SYMBOL(drm_core_ioremapfree);

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