| 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 <linux/config.h> |
| 37 | #include <linux/highmem.h> |
| 38 | #include "drmP.h" |
| 39 | |
| 40 | #ifdef DEBUG_MEMORY |
| 41 | #include "drm_memory_debug.h" |
| 42 | #else |
| 43 | |
| 44 | /** No-op. */ |
| 45 | void drm_mem_init(void) |
| 46 | { |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Called when "/proc/dri/%dev%/mem" is read. |
| 51 | * |
| 52 | * \param buf output buffer. |
| 53 | * \param start start of output data. |
| 54 | * \param offset requested start offset. |
| 55 | * \param len requested number of bytes. |
| 56 | * \param eof whether there is no more data to return. |
| 57 | * \param data private data. |
| 58 | * \return number of written bytes. |
| 59 | * |
| 60 | * No-op. |
| 61 | */ |
| 62 | int drm_mem_info(char *buf, char **start, off_t offset, |
| 63 | int len, int *eof, void *data) |
| 64 | { |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | /** Wrapper around kmalloc() and kfree() */ |
| 69 | void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area) |
| 70 | { |
| 71 | void *pt; |
| 72 | |
| 73 | if (!(pt = kmalloc(size, GFP_KERNEL))) |
| 74 | return NULL; |
| 75 | if (oldpt && oldsize) { |
| 76 | memcpy(pt, oldpt, oldsize); |
| 77 | kfree(oldpt); |
| 78 | } |
| 79 | return pt; |
| 80 | } |
| 81 | |
| 82 | #if __OS_HAS_AGP |
| 83 | /** Wrapper around agp_allocate_memory() */ |
| 84 | DRM_AGP_MEM *drm_alloc_agp(drm_device_t * dev, int pages, u32 type) |
| 85 | { |
| 86 | return drm_agp_allocate_memory(dev->agp->bridge, pages, type); |
| 87 | } |
| 88 | |
| 89 | /** Wrapper around agp_free_memory() */ |
| 90 | int drm_free_agp(DRM_AGP_MEM * handle, int pages) |
| 91 | { |
| 92 | return drm_agp_free_memory(handle) ? 0 : -EINVAL; |
| 93 | } |
| 94 | |
| 95 | /** Wrapper around agp_bind_memory() */ |
| 96 | int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start) |
| 97 | { |
| 98 | return drm_agp_bind_memory(handle, start); |
| 99 | } |
| 100 | |
| 101 | /** Wrapper around agp_unbind_memory() */ |
| 102 | int drm_unbind_agp(DRM_AGP_MEM * handle) |
| 103 | { |
| 104 | return drm_agp_unbind_memory(handle); |
| 105 | } |
| 106 | #endif /* agp */ |
| 107 | #endif /* debug_memory */ |