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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | /** * \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 <linux/highmem.h> #include "drmP.h" #ifdef DEBUG_MEMORY #include "drm_memory_debug.h" #else /** No-op. */ void drm_mem_init(void) { } /** * Called when "/proc/dri/%dev%/mem" is read. * * \param buf output buffer. * \param start start of output data. * \param offset requested start offset. * \param len requested number of bytes. * \param eof whether there is no more data to return. * \param data private data. * \return number of written bytes. * * No-op. */ int drm_mem_info(char *buf, char **start, off_t offset, int len, int *eof, void *data) { return 0; } /** Wrapper around kmalloc() and kfree() */ void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area) { void *pt; if (!(pt = kmalloc(size, GFP_KERNEL))) return NULL; if (oldpt && oldsize) { memcpy(pt, oldpt, oldsize); kfree(oldpt); } return pt; } #if __OS_HAS_AGP static void *agp_remap(unsigned long offset, unsigned long size, struct drm_device * dev) { unsigned long *phys_addr_map, i, num_pages = PAGE_ALIGN(size) / PAGE_SIZE; struct drm_agp_mem *agpmem; struct page **page_map; void *addr; size = PAGE_ALIGN(size); #ifdef __alpha__ offset -= dev->hose->mem_space->start; #endif list_for_each_entry(agpmem, &dev->agp->memory, head) if (agpmem->bound <= offset && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= (offset + size)) break; if (!agpmem) return NULL; /* * OK, we're mapping AGP space on a chipset/platform on which memory accesses by * the CPU do not get remapped by the GART. We fix this by using the kernel's * page-table instead (that's probably faster anyhow...). */ /* note: use vmalloc() because num_pages could be large... */ page_map = vmalloc(num_pages * sizeof(struct page *)); if (!page_map) return NULL; phys_addr_map = agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE; for (i = 0; i < num_pages; ++i) page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT); addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP); vfree(page_map); return addr; } /** Wrapper around agp_allocate_memory() */ DRM_AGP_MEM *drm_alloc_agp(struct drm_device * dev, int pages, u32 type) { return drm_agp_allocate_memory(dev->agp->bridge, pages, type); } /** Wrapper around agp_free_memory() */ int drm_free_agp(DRM_AGP_MEM * handle, int pages) { return drm_agp_free_memory(handle) ? 0 : -EINVAL; } /** Wrapper around agp_bind_memory() */ int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start) { return drm_agp_bind_memory(handle, start); } /** Wrapper around agp_unbind_memory() */ int drm_unbind_agp(DRM_AGP_MEM * handle) { return drm_agp_unbind_memory(handle); } #else /* __OS_HAS_AGP */ static inline void *agp_remap(unsigned long offset, unsigned long size, struct drm_device * dev) { return NULL; } #endif /* agp */ #endif /* debug_memory */ void drm_core_ioremap(struct drm_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 = ioremap(map->offset, map->size); } EXPORT_SYMBOL(drm_core_ioremap); void drm_core_ioremapfree(struct drm_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 iounmap(map->handle); } EXPORT_SYMBOL(drm_core_ioremapfree); |