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0316fe83 ZM |
1 | /* |
2 | * AGPGART driver frontend compatibility ioctls | |
3 | * Copyright (C) 2004 Silicon Graphics, Inc. | |
4 | * Copyright (C) 2002-2003 Dave Jones | |
5 | * Copyright (C) 1999 Jeff Hartmann | |
6 | * Copyright (C) 1999 Precision Insight, Inc. | |
7 | * Copyright (C) 1999 Xi Graphics, Inc. | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included | |
17 | * in all copies or substantial portions of the Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
22 | * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, | |
23 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
24 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE | |
25 | * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/kernel.h> | |
30 | #include <linux/pci.h> | |
31 | #include <linux/agpgart.h> | |
32 | #include <asm/uaccess.h> | |
33 | #include "agp.h" | |
34 | #include "compat_ioctl.h" | |
35 | ||
36 | static int compat_agpioc_info_wrap(struct agp_file_private *priv, void __user *arg) | |
37 | { | |
38 | struct agp_info32 userinfo; | |
39 | struct agp_kern_info kerninfo; | |
40 | ||
41 | agp_copy_info(agp_bridge, &kerninfo); | |
42 | ||
43 | userinfo.version.major = kerninfo.version.major; | |
44 | userinfo.version.minor = kerninfo.version.minor; | |
45 | userinfo.bridge_id = kerninfo.device->vendor | | |
46 | (kerninfo.device->device << 16); | |
47 | userinfo.agp_mode = kerninfo.mode; | |
48 | userinfo.aper_base = (compat_long_t)kerninfo.aper_base; | |
49 | userinfo.aper_size = kerninfo.aper_size; | |
50 | userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory; | |
51 | userinfo.pg_used = kerninfo.current_memory; | |
52 | ||
53 | if (copy_to_user(arg, &userinfo, sizeof(userinfo))) | |
54 | return -EFAULT; | |
55 | ||
56 | return 0; | |
57 | } | |
58 | ||
59 | static int compat_agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg) | |
60 | { | |
61 | struct agp_region32 ureserve; | |
62 | struct agp_region kreserve; | |
63 | struct agp_client *client; | |
64 | struct agp_file_private *client_priv; | |
65 | ||
66 | DBG(""); | |
67 | if (copy_from_user(&ureserve, arg, sizeof(ureserve))) | |
68 | return -EFAULT; | |
69 | ||
70 | if ((unsigned) ureserve.seg_count >= ~0U/sizeof(struct agp_segment32)) | |
71 | return -EFAULT; | |
72 | ||
73 | kreserve.pid = ureserve.pid; | |
74 | kreserve.seg_count = ureserve.seg_count; | |
75 | ||
76 | client = agp_find_client_by_pid(kreserve.pid); | |
77 | ||
78 | if (kreserve.seg_count == 0) { | |
79 | /* remove a client */ | |
80 | client_priv = agp_find_private(kreserve.pid); | |
81 | ||
82 | if (client_priv != NULL) { | |
83 | set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags); | |
84 | set_bit(AGP_FF_IS_VALID, &client_priv->access_flags); | |
85 | } | |
86 | if (client == NULL) { | |
87 | /* client is already removed */ | |
88 | return 0; | |
89 | } | |
90 | return agp_remove_client(kreserve.pid); | |
91 | } else { | |
92 | struct agp_segment32 *usegment; | |
93 | struct agp_segment *ksegment; | |
94 | int seg; | |
95 | ||
96 | if (ureserve.seg_count >= 16384) | |
97 | return -EINVAL; | |
98 | ||
99 | usegment = kmalloc(sizeof(*usegment) * ureserve.seg_count, GFP_KERNEL); | |
100 | if (!usegment) | |
101 | return -ENOMEM; | |
102 | ||
103 | ksegment = kmalloc(sizeof(*ksegment) * kreserve.seg_count, GFP_KERNEL); | |
104 | if (!ksegment) { | |
105 | kfree(usegment); | |
106 | return -ENOMEM; | |
107 | } | |
108 | ||
109 | if (copy_from_user(usegment, (void __user *) ureserve.seg_list, | |
110 | sizeof(*usegment) * ureserve.seg_count)) { | |
111 | kfree(usegment); | |
112 | kfree(ksegment); | |
113 | return -EFAULT; | |
114 | } | |
115 | ||
116 | for (seg = 0; seg < ureserve.seg_count; seg++) { | |
117 | ksegment[seg].pg_start = usegment[seg].pg_start; | |
118 | ksegment[seg].pg_count = usegment[seg].pg_count; | |
119 | ksegment[seg].prot = usegment[seg].prot; | |
120 | } | |
121 | ||
122 | kfree(usegment); | |
123 | kreserve.seg_list = ksegment; | |
124 | ||
125 | if (client == NULL) { | |
126 | /* Create the client and add the segment */ | |
127 | client = agp_create_client(kreserve.pid); | |
128 | ||
129 | if (client == NULL) { | |
130 | kfree(ksegment); | |
131 | return -ENOMEM; | |
132 | } | |
133 | client_priv = agp_find_private(kreserve.pid); | |
134 | ||
135 | if (client_priv != NULL) { | |
136 | set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags); | |
137 | set_bit(AGP_FF_IS_VALID, &client_priv->access_flags); | |
138 | } | |
139 | } | |
140 | return agp_create_segment(client, &kreserve); | |
141 | } | |
142 | /* Will never really happen */ | |
143 | return -EINVAL; | |
144 | } | |
145 | ||
146 | static int compat_agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg) | |
147 | { | |
148 | struct agp_memory *memory; | |
149 | struct agp_allocate32 alloc; | |
150 | ||
151 | DBG(""); | |
152 | if (copy_from_user(&alloc, arg, sizeof(alloc))) | |
153 | return -EFAULT; | |
154 | ||
155 | memory = agp_allocate_memory_wrap(alloc.pg_count, alloc.type); | |
156 | ||
157 | if (memory == NULL) | |
158 | return -ENOMEM; | |
159 | ||
160 | alloc.key = memory->key; | |
161 | alloc.physical = memory->physical; | |
162 | ||
163 | if (copy_to_user(arg, &alloc, sizeof(alloc))) { | |
164 | agp_free_memory_wrap(memory); | |
165 | return -EFAULT; | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static int compat_agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg) | |
171 | { | |
172 | struct agp_bind32 bind_info; | |
173 | struct agp_memory *memory; | |
174 | ||
175 | DBG(""); | |
176 | if (copy_from_user(&bind_info, arg, sizeof(bind_info))) | |
177 | return -EFAULT; | |
178 | ||
179 | memory = agp_find_mem_by_key(bind_info.key); | |
180 | ||
181 | if (memory == NULL) | |
182 | return -EINVAL; | |
183 | ||
184 | return agp_bind_memory(memory, bind_info.pg_start); | |
185 | } | |
186 | ||
187 | static int compat_agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg) | |
188 | { | |
189 | struct agp_memory *memory; | |
190 | struct agp_unbind32 unbind; | |
191 | ||
192 | DBG(""); | |
193 | if (copy_from_user(&unbind, arg, sizeof(unbind))) | |
194 | return -EFAULT; | |
195 | ||
196 | memory = agp_find_mem_by_key(unbind.key); | |
197 | ||
198 | if (memory == NULL) | |
199 | return -EINVAL; | |
200 | ||
201 | return agp_unbind_memory(memory); | |
202 | } | |
203 | ||
204 | long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
205 | { | |
206 | struct agp_file_private *curr_priv = file->private_data; | |
207 | int ret_val = -ENOTTY; | |
208 | ||
209 | mutex_lock(&(agp_fe.agp_mutex)); | |
210 | ||
211 | if ((agp_fe.current_controller == NULL) && | |
212 | (cmd != AGPIOC_ACQUIRE32)) { | |
213 | ret_val = -EINVAL; | |
214 | goto ioctl_out; | |
215 | } | |
216 | if ((agp_fe.backend_acquired != TRUE) && | |
217 | (cmd != AGPIOC_ACQUIRE32)) { | |
218 | ret_val = -EBUSY; | |
219 | goto ioctl_out; | |
220 | } | |
221 | if (cmd != AGPIOC_ACQUIRE32) { | |
222 | if (!(test_bit(AGP_FF_IS_CONTROLLER, &curr_priv->access_flags))) { | |
223 | ret_val = -EPERM; | |
224 | goto ioctl_out; | |
225 | } | |
226 | /* Use the original pid of the controller, | |
227 | * in case it's threaded */ | |
228 | ||
229 | if (agp_fe.current_controller->pid != curr_priv->my_pid) { | |
230 | ret_val = -EBUSY; | |
231 | goto ioctl_out; | |
232 | } | |
233 | } | |
234 | ||
235 | switch (cmd) { | |
236 | case AGPIOC_INFO32: | |
237 | ret_val = compat_agpioc_info_wrap(curr_priv, (void __user *) arg); | |
238 | break; | |
239 | ||
240 | case AGPIOC_ACQUIRE32: | |
241 | ret_val = agpioc_acquire_wrap(curr_priv); | |
242 | break; | |
243 | ||
244 | case AGPIOC_RELEASE32: | |
245 | ret_val = agpioc_release_wrap(curr_priv); | |
246 | break; | |
247 | ||
248 | case AGPIOC_SETUP32: | |
249 | ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg); | |
250 | break; | |
251 | ||
252 | case AGPIOC_RESERVE32: | |
253 | ret_val = compat_agpioc_reserve_wrap(curr_priv, (void __user *) arg); | |
254 | break; | |
255 | ||
256 | case AGPIOC_PROTECT32: | |
257 | ret_val = agpioc_protect_wrap(curr_priv); | |
258 | break; | |
259 | ||
260 | case AGPIOC_ALLOCATE32: | |
261 | ret_val = compat_agpioc_allocate_wrap(curr_priv, (void __user *) arg); | |
262 | break; | |
263 | ||
264 | case AGPIOC_DEALLOCATE32: | |
265 | ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg); | |
266 | break; | |
267 | ||
268 | case AGPIOC_BIND32: | |
269 | ret_val = compat_agpioc_bind_wrap(curr_priv, (void __user *) arg); | |
270 | break; | |
271 | ||
272 | case AGPIOC_UNBIND32: | |
273 | ret_val = compat_agpioc_unbind_wrap(curr_priv, (void __user *) arg); | |
274 | break; | |
275 | } | |
276 | ||
277 | ioctl_out: | |
278 | DBG("ioctl returns %d\n", ret_val); | |
279 | mutex_unlock(&(agp_fe.agp_mutex)); | |
280 | return ret_val; | |
281 | } | |
282 |