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https://github.com/freebsd/freebsd-src
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133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/**
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* \file drm_memory.c
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* Memory management wrappers for DRM
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*
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* Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <sys/cdefs.h>
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#include <dev/drm2/drmP.h>
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#define vunmap(handle)
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#if __OS_HAS_AGP
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static void *agp_remap(unsigned long offset, unsigned long size,
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struct drm_device * dev)
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{
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/*
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* FIXME Linux<->FreeBSD: Not implemented. This is never called
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* on FreeBSD anyway, because drm_agp_mem->cant_use_aperture is
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* set to 0.
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*/
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return NULL;
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}
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/** Wrapper around agp_free_memory() */
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void drm_free_agp(DRM_AGP_MEM * handle, int pages)
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{
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device_t agpdev;
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agpdev = agp_find_device();
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if (!agpdev || !handle)
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return;
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agp_free_memory(agpdev, handle);
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}
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EXPORT_SYMBOL(drm_free_agp);
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/** Wrapper around agp_bind_memory() */
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int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
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{
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device_t agpdev;
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agpdev = agp_find_device();
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if (!agpdev || !handle)
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return -EINVAL;
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return -agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
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}
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/** Wrapper around agp_unbind_memory() */
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int drm_unbind_agp(DRM_AGP_MEM * handle)
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{
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device_t agpdev;
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agpdev = agp_find_device();
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if (!agpdev || !handle)
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return -EINVAL;
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return -agp_unbind_memory(agpdev, handle);
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}
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EXPORT_SYMBOL(drm_unbind_agp);
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#else /* __OS_HAS_AGP */
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static inline void *agp_remap(unsigned long offset, unsigned long size,
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struct drm_device * dev)
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{
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return NULL;
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}
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#endif /* agp */
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void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev)
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{
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if (drm_core_has_AGP(dev) &&
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dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
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map->handle = agp_remap(map->offset, map->size, dev);
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else
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map->handle = pmap_mapdev(map->offset, map->size);
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}
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EXPORT_SYMBOL(drm_core_ioremap);
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void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev)
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{
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if (drm_core_has_AGP(dev) &&
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dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
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map->handle = agp_remap(map->offset, map->size, dev);
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else
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map->handle = pmap_mapdev_attr(map->offset, map->size,
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VM_MEMATTR_WRITE_COMBINING);
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}
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EXPORT_SYMBOL(drm_core_ioremap_wc);
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void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
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{
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if (!map->handle || !map->size)
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return;
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if (drm_core_has_AGP(dev) &&
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dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
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vunmap(map->handle);
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else
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pmap_unmapdev(map->handle, map->size);
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}
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EXPORT_SYMBOL(drm_core_ioremapfree);
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