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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
|
/**
* \file drm_compat.h
* Backward compatability definitions for Direct Rendering Manager
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@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.
*/
#ifndef _DRM_COMPAT_H_
#define _DRM_COMPAT_H_
#ifndef minor
#define minor(x) MINOR((x))
#endif
#ifndef MODULE_LICENSE
#define MODULE_LICENSE(x)
#endif
#ifndef preempt_disable
#define preempt_disable()
#define preempt_enable()
#endif
#ifndef pte_offset_map
#define pte_offset_map pte_offset
#define pte_unmap(pte)
#endif
#ifndef module_param
#define module_param(name, type, perm)
#endif
/* older kernels had different irq args */
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
#undef DRM_IRQ_ARGS
#define DRM_IRQ_ARGS int irq, void *arg, struct pt_regs *regs
#endif
#ifndef list_for_each_safe
#define list_for_each_safe(pos, n, head) \
for (pos = (head)->next, n = pos->next; pos != (head); \
pos = n, n = pos->next)
#endif
#ifndef list_for_each_entry
#define list_for_each_entry(pos, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member), \
prefetch(pos->member.next); \
&pos->member != (head); \
pos = list_entry(pos->member.next, typeof(*pos), member), \
prefetch(pos->member.next))
#endif
#ifndef list_for_each_entry_safe
#define list_for_each_entry_safe(pos, n, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member), \
n = list_entry(pos->member.next, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.next, typeof(*n), member))
#endif
#ifndef __user
#define __user
#endif
#if !defined(__put_page)
#define __put_page(p) atomic_dec(&(p)->count)
#endif
#if !defined(__GFP_COMP)
#define __GFP_COMP 0
#endif
#define VM_OFFSET(vma) ((vma)->vm_pgoff << PAGE_SHIFT)
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
static inline int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t pgprot)
{
return remap_page_range(vma, from,
pfn << PAGE_SHIFT,
size,
pgprot);
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
#define mutex_lock down
#define mutex_unlock up
#define mutex semaphore
#define mutex_init(a) sema_init((a), 1)
#endif
#ifndef DEFINE_SPINLOCK
#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
#endif
/* old architectures */
#ifdef __AMD64__
#define __x86_64__
#endif
/* sysfs __ATTR macro */
#ifndef __ATTR
#define __ATTR(_name,_mode,_show,_store) { \
.attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
.show = _show, \
.store = _store, \
}
#endif
#include <linux/mm.h>
#include <asm/page.h>
#if ((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) && \
(LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)))
#define DRM_ODD_MM_COMPAT
#endif
/*
* Flush relevant caches and clear a VMA structure so that page references
* will cause a page fault. Don't flush tlbs.
*/
extern void drm_clear_vma(struct vm_area_struct *vma,
unsigned long addr, unsigned long end);
/*
* Return the PTE protection map entries for the VMA flags given by
* flags. This is a functional interface to the kernel's protection map.
*/
extern pgprot_t vm_get_page_prot(unsigned long vm_flags);
/*
* These are similar to the current kernel gatt pages allocator, only that we
* want a struct page pointer instead of a virtual address. This allows for pages
* that are not in the kernel linear map.
*/
#define drm_alloc_gatt_pages(order) ({ \
void *_virt = alloc_gatt_pages(order); \
((_virt) ? virt_to_page(_virt) : NULL);})
#define drm_free_gatt_pages(pages, order) free_gatt_pages(page_address(pages), order)
#if defined(CONFIG_X86) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
/*
* These are too slow in earlier kernels.
*/
extern int drm_unmap_page_from_agp(struct page *page);
extern int drm_map_page_into_agp(struct page *page);
#define map_page_into_agp drm_map_page_into_agp
#define unmap_page_from_agp drm_unmap_page_from_agp
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
extern struct page *get_nopage_retry(void);
extern void free_nopage_retry(void);
struct fault_data;
extern struct page *drm_vm_ttm_fault(struct vm_area_struct *vma,
struct fault_data *data);
#define NOPAGE_REFAULT get_nopage_retry()
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
/*
* Hopefully, real NOPAGE_RETRY functionality will be in 2.6.19.
* For now, just return a dummy page that we've allocated out of
* static space. The page will be put by do_nopage() since we've already
* filled out the pte.
*/
struct fault_data {
struct vm_area_struct *vma;
unsigned long address;
pgoff_t pgoff;
unsigned int flags;
int type;
};
extern int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr,
unsigned long pfn, pgprot_t pgprot);
extern struct page *drm_vm_ttm_nopage(struct vm_area_struct *vma,
unsigned long address,
int *type);
#endif
#ifdef DRM_ODD_MM_COMPAT
struct drm_ttm;
/*
* Add a vma to the ttm vma list, and the
* process mm pointer to the ttm mm list. Needs the ttm mutex.
*/
extern int drm_ttm_add_vma(struct drm_ttm * ttm,
struct vm_area_struct *vma);
/*
* Delete a vma and the corresponding mm pointer from the
* ttm lists. Needs the ttm mutex.
*/
extern void drm_ttm_delete_vma(struct drm_ttm * ttm,
struct vm_area_struct *vma);
/*
* Attempts to lock all relevant mmap_sems for a ttm, while
* not releasing the ttm mutex. May return -EAGAIN to avoid
* deadlocks. In that case the caller shall release the ttm mutex,
* schedule() and try again.
*/
extern int drm_ttm_lock_mm(struct drm_ttm * ttm);
/*
* Unlock all relevant mmap_sems for a ttm.
*/
extern void drm_ttm_unlock_mm(struct drm_ttm * ttm);
/*
* If the ttm was bound to the aperture, this function shall be called
* with all relevant mmap sems held. It deletes the flag VM_PFNMAP from all
* vmas mapping this ttm. This is needed just after unmapping the ptes of
* the vma, otherwise the do_nopage() function will bug :(. The function
* releases the mmap_sems for this ttm.
*/
extern void drm_ttm_finish_unmap(struct drm_ttm *ttm);
/*
* Remap all vmas of this ttm using io_remap_pfn_range. We cannot
* fault these pfns in, because the first one will set the vma VM_PFNMAP
* flag, which will make the next fault bug in do_nopage(). The function
* releases the mmap_sems for this ttm.
*/
extern int drm_ttm_remap_bound(struct drm_ttm *ttm);
/*
* Remap a vma for a bound ttm. Call with the ttm mutex held and
* the relevant mmap_sem locked.
*/
extern int drm_ttm_map_bound(struct vm_area_struct *vma);
#endif
#endif
|
