Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1 | /** |
| 2 | * \file drm_memory.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 9 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/highmem.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame^] | 37 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "drmP.h" |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | /** |
| 41 | * Called when "/proc/dri/%dev%/mem" is read. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 42 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | * \param buf output buffer. |
| 44 | * \param start start of output data. |
| 45 | * \param offset requested start offset. |
| 46 | * \param len requested number of bytes. |
| 47 | * \param eof whether there is no more data to return. |
| 48 | * \param data private data. |
| 49 | * \return number of written bytes. |
| 50 | * |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 51 | * No-op. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | */ |
| 53 | int drm_mem_info(char *buf, char **start, off_t offset, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 54 | int len, int *eof, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | { |
| 56 | return 0; |
| 57 | } |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #if __OS_HAS_AGP |
Adrian Bunk | 031de96 | 2006-04-10 23:18:27 -0700 | [diff] [blame] | 60 | static void *agp_remap(unsigned long offset, unsigned long size, |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 61 | struct drm_device * dev) |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 62 | { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 63 | unsigned long i, num_pages = |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 64 | PAGE_ALIGN(size) / PAGE_SIZE; |
| 65 | struct drm_agp_mem *agpmem; |
| 66 | struct page **page_map; |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 67 | struct page **phys_page_map; |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 68 | void *addr; |
| 69 | |
| 70 | size = PAGE_ALIGN(size); |
| 71 | |
| 72 | #ifdef __alpha__ |
| 73 | offset -= dev->hose->mem_space->start; |
| 74 | #endif |
| 75 | |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 76 | list_for_each_entry(agpmem, &dev->agp->memory, head) |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 77 | if (agpmem->bound <= offset |
| 78 | && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= |
| 79 | (offset + size)) |
| 80 | break; |
Dan Carpenter | 404b017 | 2010-04-27 14:11:05 -0700 | [diff] [blame] | 81 | if (&agpmem->head == &dev->agp->memory) |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 82 | return NULL; |
| 83 | |
| 84 | /* |
| 85 | * OK, we're mapping AGP space on a chipset/platform on which memory accesses by |
| 86 | * the CPU do not get remapped by the GART. We fix this by using the kernel's |
| 87 | * page-table instead (that's probably faster anyhow...). |
| 88 | */ |
| 89 | /* note: use vmalloc() because num_pages could be large... */ |
| 90 | page_map = vmalloc(num_pages * sizeof(struct page *)); |
| 91 | if (!page_map) |
| 92 | return NULL; |
| 93 | |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 94 | phys_page_map = (agpmem->memory->pages + (offset - agpmem->bound) / PAGE_SIZE); |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 95 | for (i = 0; i < num_pages; ++i) |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 96 | page_map[i] = phys_page_map[i]; |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 97 | addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP); |
| 98 | vfree(page_map); |
| 99 | |
| 100 | return addr; |
| 101 | } |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /** Wrapper around agp_free_memory() */ |
Daniel Vetter | 690bb51 | 2010-08-23 22:53:35 +0200 | [diff] [blame] | 104 | void drm_free_agp(DRM_AGP_MEM * handle, int pages) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
Daniel Vetter | 89c3726 | 2010-08-23 22:53:36 +0200 | [diff] [blame] | 106 | agp_free_memory(handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 108 | EXPORT_SYMBOL(drm_free_agp); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | /** Wrapper around agp_bind_memory() */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 111 | int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Daniel Vetter | 89c3726 | 2010-08-23 22:53:36 +0200 | [diff] [blame] | 113 | return agp_bind_memory(handle, start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | /** Wrapper around agp_unbind_memory() */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 117 | int drm_unbind_agp(DRM_AGP_MEM * handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
Daniel Vetter | 89c3726 | 2010-08-23 22:53:36 +0200 | [diff] [blame] | 119 | return agp_unbind_memory(handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 121 | EXPORT_SYMBOL(drm_unbind_agp); |
Adrian Bunk | 031de96 | 2006-04-10 23:18:27 -0700 | [diff] [blame] | 122 | |
| 123 | #else /* __OS_HAS_AGP */ |
Adrian Bunk | 031de96 | 2006-04-10 23:18:27 -0700 | [diff] [blame] | 124 | static inline void *agp_remap(unsigned long offset, unsigned long size, |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 125 | struct drm_device * dev) |
Adrian Bunk | 031de96 | 2006-04-10 23:18:27 -0700 | [diff] [blame] | 126 | { |
| 127 | return NULL; |
| 128 | } |
| 129 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 130 | #endif /* agp */ |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame] | 131 | |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 132 | void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev) |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 133 | { |
| 134 | if (drm_core_has_AGP(dev) && |
| 135 | dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) |
| 136 | map->handle = agp_remap(map->offset, map->size, dev); |
| 137 | else |
| 138 | map->handle = ioremap(map->offset, map->size); |
| 139 | } |
| 140 | EXPORT_SYMBOL(drm_core_ioremap); |
| 141 | |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 142 | void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev) |
Dave Airlie | 242e3df | 2008-07-15 15:48:05 +1000 | [diff] [blame] | 143 | { |
Dave Airlie | 9b8d5a1 | 2009-02-07 11:15:41 +1000 | [diff] [blame] | 144 | if (drm_core_has_AGP(dev) && |
| 145 | dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) |
| 146 | map->handle = agp_remap(map->offset, map->size, dev); |
| 147 | else |
| 148 | map->handle = ioremap_wc(map->offset, map->size); |
Dave Airlie | 242e3df | 2008-07-15 15:48:05 +1000 | [diff] [blame] | 149 | } |
| 150 | EXPORT_SYMBOL(drm_core_ioremap_wc); |
Dave Airlie | 9b8d5a1 | 2009-02-07 11:15:41 +1000 | [diff] [blame] | 151 | |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 152 | void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev) |
Christoph Hellwig | 004a772 | 2007-01-08 21:56:59 +1100 | [diff] [blame] | 153 | { |
| 154 | if (!map->handle || !map->size) |
| 155 | return; |
| 156 | |
| 157 | if (drm_core_has_AGP(dev) && |
| 158 | dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) |
| 159 | vunmap(map->handle); |
| 160 | else |
| 161 | iounmap(map->handle); |
| 162 | } |
| 163 | EXPORT_SYMBOL(drm_core_ioremapfree); |