mirror of
https://github.com/freebsd/freebsd-src.git
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Michal Meloun
c19e557fec
r308612:
Allow DRM2 code to be built on platforms without AGP. This patch is taken
from original drm-3.8 code.
r308614:
Allow embeding DRM2 code into kernel. It's usefull for development (for
netboot) and it also helps to boot FreeBSD on some embeded platforms (where
we must boot kernel directly, without standard boot loader).
135 lines
3.8 KiB
C
135 lines
3.8 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 <[email protected]>
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* \author Gareth Hughes <[email protected]>
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*/
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/*
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* Created: Thu Feb 4 14:00:34 1999 by [email protected]
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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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__FBSDID("$FreeBSD$");
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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((vm_offset_t)map->handle, map->size);
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}
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EXPORT_SYMBOL(drm_core_ioremapfree);
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