1 /** 2 * \file drm_memory.c 3 * Memory management wrappers for DRM 4 * 5 * \author Rickard E. (Rik) Faith <faith@valinux.com> 6 * \author Gareth Hughes <gareth@valinux.com> 7 */ 8 9 /* 10 * Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com 11 * 12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 14 * All Rights Reserved. 15 * 16 * Permission is hereby granted, free of charge, to any person obtaining a 17 * copy of this software and associated documentation files (the "Software"), 18 * to deal in the Software without restriction, including without limitation 19 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 20 * and/or sell copies of the Software, and to permit persons to whom the 21 * Software is furnished to do so, subject to the following conditions: 22 * 23 * The above copyright notice and this permission notice (including the next 24 * paragraph) shall be included in all copies or substantial portions of the 25 * Software. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 33 * OTHER DEALINGS IN THE SOFTWARE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <dev/drm2/drmP.h> 40 41 #define vunmap(handle) 42 43 #if __OS_HAS_AGP 44 static void *agp_remap(unsigned long offset, unsigned long size, 45 struct drm_device * dev) 46 { 47 /* 48 * FIXME Linux<->FreeBSD: Not implemented. This is never called 49 * on FreeBSD anyway, because drm_agp_mem->cant_use_aperture is 50 * set to 0. 51 */ 52 return NULL; 53 } 54 55 /** Wrapper around agp_free_memory() */ 56 void drm_free_agp(DRM_AGP_MEM * handle, int pages) 57 { 58 device_t agpdev; 59 60 agpdev = agp_find_device(); 61 if (!agpdev || !handle) 62 return; 63 64 agp_free_memory(agpdev, handle); 65 } 66 EXPORT_SYMBOL(drm_free_agp); 67 68 /** Wrapper around agp_bind_memory() */ 69 int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start) 70 { 71 device_t agpdev; 72 73 agpdev = agp_find_device(); 74 if (!agpdev || !handle) 75 return -EINVAL; 76 77 return -agp_bind_memory(agpdev, handle, start * PAGE_SIZE); 78 } 79 80 /** Wrapper around agp_unbind_memory() */ 81 int drm_unbind_agp(DRM_AGP_MEM * handle) 82 { 83 device_t agpdev; 84 85 agpdev = agp_find_device(); 86 if (!agpdev || !handle) 87 return -EINVAL; 88 89 return -agp_unbind_memory(agpdev, handle); 90 } 91 EXPORT_SYMBOL(drm_unbind_agp); 92 93 #else /* __OS_HAS_AGP */ 94 static inline void *agp_remap(unsigned long offset, unsigned long size, 95 struct drm_device * dev) 96 { 97 return NULL; 98 } 99 100 #endif /* agp */ 101 102 void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev) 103 { 104 if (drm_core_has_AGP(dev) && 105 dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) 106 map->handle = agp_remap(map->offset, map->size, dev); 107 else 108 map->handle = pmap_mapdev(map->offset, map->size); 109 } 110 EXPORT_SYMBOL(drm_core_ioremap); 111 112 void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev) 113 { 114 if (drm_core_has_AGP(dev) && 115 dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) 116 map->handle = agp_remap(map->offset, map->size, dev); 117 else 118 map->handle = pmap_mapdev_attr(map->offset, map->size, 119 VM_MEMATTR_WRITE_COMBINING); 120 } 121 EXPORT_SYMBOL(drm_core_ioremap_wc); 122 123 void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev) 124 { 125 if (!map->handle || !map->size) 126 return; 127 128 if (drm_core_has_AGP(dev) && 129 dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) 130 vunmap(map->handle); 131 else 132 pmap_unmapdev((vm_offset_t)map->handle, map->size); 133 } 134 EXPORT_SYMBOL(drm_core_ioremapfree); 135