Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 1 | /** |
| 2 | * \file drm_memory.h |
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 | |
| 36 | #include <linux/config.h> |
| 37 | #include <linux/highmem.h> |
| 38 | #include <linux/vmalloc.h> |
| 39 | #include "drmP.h" |
| 40 | |
| 41 | /** |
| 42 | * Cut down version of drm_memory_debug.h, which used to be called |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 43 | * drm_memory.h. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | */ |
| 45 | |
| 46 | #if __OS_HAS_AGP |
| 47 | |
| 48 | #include <linux/vmalloc.h> |
| 49 | |
| 50 | #ifdef HAVE_PAGE_AGP |
| 51 | #include <asm/agp.h> |
| 52 | #else |
| 53 | # ifdef __powerpc__ |
| 54 | # define PAGE_AGP __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE) |
| 55 | # else |
| 56 | # define PAGE_AGP PAGE_KERNEL |
| 57 | # endif |
| 58 | #endif |
| 59 | |
| 60 | /* |
| 61 | * Find the drm_map that covers the range [offset, offset+size). |
| 62 | */ |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame^] | 63 | drm_map_t *drm_lookup_map(unsigned long offset, |
| 64 | unsigned long size, drm_device_t * dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame^] | 66 | void *agp_remap(unsigned long offset, unsigned long size, |
| 67 | drm_device_t * dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 69 | static inline unsigned long drm_follow_page(void *vaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 71 | pgd_t *pgd = pgd_offset_k((unsigned long)vaddr); |
| 72 | pud_t *pud = pud_offset(pgd, (unsigned long)vaddr); |
| 73 | pmd_t *pmd = pmd_offset(pud, (unsigned long)vaddr); |
| 74 | pte_t *ptep = pte_offset_kernel(pmd, (unsigned long)vaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | return pte_pfn(*ptep) << PAGE_SHIFT; |
| 76 | } |
| 77 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 78 | #else /* __OS_HAS_AGP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 80 | static inline drm_map_t *drm_lookup_map(unsigned long offset, |
| 81 | unsigned long size, drm_device_t * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 83 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 86 | static inline void *agp_remap(unsigned long offset, unsigned long size, |
| 87 | drm_device_t * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 89 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 92 | static inline unsigned long drm_follow_page(void *vaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 94 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | #endif |
| 98 | |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame^] | 99 | void *drm_ioremap(unsigned long offset, unsigned long size, |
| 100 | drm_device_t * dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame^] | 102 | void *drm_ioremap_nocache(unsigned long offset, |
| 103 | unsigned long size, drm_device_t * dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Dave Airlie | 31f64bd | 2006-04-07 16:55:43 +1000 | [diff] [blame^] | 105 | void drm_ioremapfree(void *pt, unsigned long size, |
| 106 | drm_device_t * dev); |