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/fs.h> |
32 | #include <linux/agpgart.h> |
33 | #include <linux/slab.h> |
34 | #include <linux/uaccess.h> |
35 | #include "agp.h" |
36 | #include "compat_ioctl.h" |
37 | |
38 | static int compat_agpioc_info_wrap(struct agp_file_private *priv, void __user *arg) |
39 | { |
40 | struct agp_info32 userinfo; |
41 | struct agp_kern_info kerninfo; |
42 | |
43 | agp_copy_info(agp_bridge, &kerninfo); |
44 | |
45 | userinfo.version.major = kerninfo.version.major; |
46 | userinfo.version.minor = kerninfo.version.minor; |
47 | userinfo.bridge_id = kerninfo.device->vendor | |
48 | (kerninfo.device->device << 16); |
49 | userinfo.agp_mode = kerninfo.mode; |
50 | userinfo.aper_base = (compat_long_t)kerninfo.aper_base; |
51 | userinfo.aper_size = kerninfo.aper_size; |
52 | userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory; |
53 | userinfo.pg_used = kerninfo.current_memory; |
54 | |
55 | if (copy_to_user(to: arg, from: &userinfo, n: sizeof(userinfo))) |
56 | return -EFAULT; |
57 | |
58 | return 0; |
59 | } |
60 | |
61 | static int compat_agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg) |
62 | { |
63 | struct agp_region32 ureserve; |
64 | struct agp_region kreserve; |
65 | struct agp_client *client; |
66 | struct agp_file_private *client_priv; |
67 | |
68 | DBG("" ); |
69 | if (copy_from_user(to: &ureserve, from: arg, n: sizeof(ureserve))) |
70 | return -EFAULT; |
71 | |
72 | if ((unsigned) ureserve.seg_count >= ~0U/sizeof(struct agp_segment32)) |
73 | return -EFAULT; |
74 | |
75 | kreserve.pid = ureserve.pid; |
76 | kreserve.seg_count = ureserve.seg_count; |
77 | |
78 | client = agp_find_client_by_pid(id: kreserve.pid); |
79 | |
80 | if (kreserve.seg_count == 0) { |
81 | /* remove a client */ |
82 | client_priv = agp_find_private(pid: kreserve.pid); |
83 | |
84 | if (client_priv != NULL) { |
85 | set_bit(AGP_FF_IS_CLIENT, addr: &client_priv->access_flags); |
86 | set_bit(AGP_FF_IS_VALID, addr: &client_priv->access_flags); |
87 | } |
88 | if (client == NULL) { |
89 | /* client is already removed */ |
90 | return 0; |
91 | } |
92 | return agp_remove_client(id: kreserve.pid); |
93 | } else { |
94 | struct agp_segment32 *usegment; |
95 | struct agp_segment *ksegment; |
96 | int seg; |
97 | |
98 | if (ureserve.seg_count >= 16384) |
99 | return -EINVAL; |
100 | |
101 | usegment = kmalloc_array(n: ureserve.seg_count, |
102 | size: sizeof(*usegment), |
103 | GFP_KERNEL); |
104 | if (!usegment) |
105 | return -ENOMEM; |
106 | |
107 | ksegment = kmalloc_array(n: kreserve.seg_count, |
108 | size: sizeof(*ksegment), |
109 | GFP_KERNEL); |
110 | if (!ksegment) { |
111 | kfree(objp: usegment); |
112 | return -ENOMEM; |
113 | } |
114 | |
115 | if (copy_from_user(to: usegment, from: (void __user *) ureserve.seg_list, |
116 | n: sizeof(*usegment) * ureserve.seg_count)) { |
117 | kfree(objp: usegment); |
118 | kfree(objp: ksegment); |
119 | return -EFAULT; |
120 | } |
121 | |
122 | for (seg = 0; seg < ureserve.seg_count; seg++) { |
123 | ksegment[seg].pg_start = usegment[seg].pg_start; |
124 | ksegment[seg].pg_count = usegment[seg].pg_count; |
125 | ksegment[seg].prot = usegment[seg].prot; |
126 | } |
127 | |
128 | kfree(objp: usegment); |
129 | kreserve.seg_list = ksegment; |
130 | |
131 | if (client == NULL) { |
132 | /* Create the client and add the segment */ |
133 | client = agp_create_client(id: kreserve.pid); |
134 | |
135 | if (client == NULL) { |
136 | kfree(objp: ksegment); |
137 | return -ENOMEM; |
138 | } |
139 | client_priv = agp_find_private(pid: kreserve.pid); |
140 | |
141 | if (client_priv != NULL) { |
142 | set_bit(AGP_FF_IS_CLIENT, addr: &client_priv->access_flags); |
143 | set_bit(AGP_FF_IS_VALID, addr: &client_priv->access_flags); |
144 | } |
145 | } |
146 | return agp_create_segment(client, region: &kreserve); |
147 | } |
148 | /* Will never really happen */ |
149 | return -EINVAL; |
150 | } |
151 | |
152 | static int compat_agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg) |
153 | { |
154 | struct agp_memory *memory; |
155 | struct agp_allocate32 alloc; |
156 | |
157 | DBG("" ); |
158 | if (copy_from_user(to: &alloc, from: arg, n: sizeof(alloc))) |
159 | return -EFAULT; |
160 | |
161 | memory = agp_allocate_memory_wrap(pg_count: alloc.pg_count, type: alloc.type); |
162 | |
163 | if (memory == NULL) |
164 | return -ENOMEM; |
165 | |
166 | alloc.key = memory->key; |
167 | alloc.physical = memory->physical; |
168 | |
169 | if (copy_to_user(to: arg, from: &alloc, n: sizeof(alloc))) { |
170 | agp_free_memory_wrap(memory); |
171 | return -EFAULT; |
172 | } |
173 | return 0; |
174 | } |
175 | |
176 | static int compat_agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg) |
177 | { |
178 | struct agp_bind32 bind_info; |
179 | struct agp_memory *memory; |
180 | |
181 | DBG("" ); |
182 | if (copy_from_user(to: &bind_info, from: arg, n: sizeof(bind_info))) |
183 | return -EFAULT; |
184 | |
185 | memory = agp_find_mem_by_key(key: bind_info.key); |
186 | |
187 | if (memory == NULL) |
188 | return -EINVAL; |
189 | |
190 | return agp_bind_memory(memory, bind_info.pg_start); |
191 | } |
192 | |
193 | static int compat_agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg) |
194 | { |
195 | struct agp_memory *memory; |
196 | struct agp_unbind32 unbind; |
197 | |
198 | DBG("" ); |
199 | if (copy_from_user(to: &unbind, from: arg, n: sizeof(unbind))) |
200 | return -EFAULT; |
201 | |
202 | memory = agp_find_mem_by_key(key: unbind.key); |
203 | |
204 | if (memory == NULL) |
205 | return -EINVAL; |
206 | |
207 | return agp_unbind_memory(memory); |
208 | } |
209 | |
210 | long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
211 | { |
212 | struct agp_file_private *curr_priv = file->private_data; |
213 | int ret_val = -ENOTTY; |
214 | |
215 | mutex_lock(&(agp_fe.agp_mutex)); |
216 | |
217 | if ((agp_fe.current_controller == NULL) && |
218 | (cmd != AGPIOC_ACQUIRE32)) { |
219 | ret_val = -EINVAL; |
220 | goto ioctl_out; |
221 | } |
222 | if ((agp_fe.backend_acquired != true) && |
223 | (cmd != AGPIOC_ACQUIRE32)) { |
224 | ret_val = -EBUSY; |
225 | goto ioctl_out; |
226 | } |
227 | if (cmd != AGPIOC_ACQUIRE32) { |
228 | if (!(test_bit(AGP_FF_IS_CONTROLLER, &curr_priv->access_flags))) { |
229 | ret_val = -EPERM; |
230 | goto ioctl_out; |
231 | } |
232 | /* Use the original pid of the controller, |
233 | * in case it's threaded */ |
234 | |
235 | if (agp_fe.current_controller->pid != curr_priv->my_pid) { |
236 | ret_val = -EBUSY; |
237 | goto ioctl_out; |
238 | } |
239 | } |
240 | |
241 | switch (cmd) { |
242 | case AGPIOC_INFO32: |
243 | ret_val = compat_agpioc_info_wrap(priv: curr_priv, arg: (void __user *) arg); |
244 | break; |
245 | |
246 | case AGPIOC_ACQUIRE32: |
247 | ret_val = agpioc_acquire_wrap(priv: curr_priv); |
248 | break; |
249 | |
250 | case AGPIOC_RELEASE32: |
251 | ret_val = agpioc_release_wrap(priv: curr_priv); |
252 | break; |
253 | |
254 | case AGPIOC_SETUP32: |
255 | ret_val = agpioc_setup_wrap(priv: curr_priv, arg: (void __user *) arg); |
256 | break; |
257 | |
258 | case AGPIOC_RESERVE32: |
259 | ret_val = compat_agpioc_reserve_wrap(priv: curr_priv, arg: (void __user *) arg); |
260 | break; |
261 | |
262 | case AGPIOC_PROTECT32: |
263 | ret_val = agpioc_protect_wrap(priv: curr_priv); |
264 | break; |
265 | |
266 | case AGPIOC_ALLOCATE32: |
267 | ret_val = compat_agpioc_allocate_wrap(priv: curr_priv, arg: (void __user *) arg); |
268 | break; |
269 | |
270 | case AGPIOC_DEALLOCATE32: |
271 | ret_val = agpioc_deallocate_wrap(priv: curr_priv, arg: (int) arg); |
272 | break; |
273 | |
274 | case AGPIOC_BIND32: |
275 | ret_val = compat_agpioc_bind_wrap(priv: curr_priv, arg: (void __user *) arg); |
276 | break; |
277 | |
278 | case AGPIOC_UNBIND32: |
279 | ret_val = compat_agpioc_unbind_wrap(priv: curr_priv, arg: (void __user *) arg); |
280 | break; |
281 | |
282 | case AGPIOC_CHIPSET_FLUSH32: |
283 | break; |
284 | } |
285 | |
286 | ioctl_out: |
287 | DBG("ioctl returns %d\n" , ret_val); |
288 | mutex_unlock(lock: &(agp_fe.agp_mutex)); |
289 | return ret_val; |
290 | } |
291 | |
292 | |