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
compat_agpioc_info_wrap(struct agp_file_private * priv,void __user * arg)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(arg, &userinfo, sizeof(userinfo)))
56 return -EFAULT;
57
58 return 0;
59 }
60
compat_agpioc_reserve_wrap(struct agp_file_private * priv,void __user * arg)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(&ureserve, arg, 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(kreserve.pid);
79
80 if (kreserve.seg_count == 0) {
81 /* remove a client */
82 client_priv = agp_find_private(kreserve.pid);
83
84 if (client_priv != NULL) {
85 set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);
86 set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);
87 }
88 if (client == NULL) {
89 /* client is already removed */
90 return 0;
91 }
92 return agp_remove_client(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(ureserve.seg_count,
102 sizeof(*usegment),
103 GFP_KERNEL);
104 if (!usegment)
105 return -ENOMEM;
106
107 ksegment = kmalloc_array(kreserve.seg_count,
108 sizeof(*ksegment),
109 GFP_KERNEL);
110 if (!ksegment) {
111 kfree(usegment);
112 return -ENOMEM;
113 }
114
115 if (copy_from_user(usegment, (void __user *) ureserve.seg_list,
116 sizeof(*usegment) * ureserve.seg_count)) {
117 kfree(usegment);
118 kfree(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(usegment);
129 kreserve.seg_list = ksegment;
130
131 if (client == NULL) {
132 /* Create the client and add the segment */
133 client = agp_create_client(kreserve.pid);
134
135 if (client == NULL) {
136 kfree(ksegment);
137 return -ENOMEM;
138 }
139 client_priv = agp_find_private(kreserve.pid);
140
141 if (client_priv != NULL) {
142 set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);
143 set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);
144 }
145 }
146 return agp_create_segment(client, &kreserve);
147 }
148 /* Will never really happen */
149 return -EINVAL;
150 }
151
compat_agpioc_allocate_wrap(struct agp_file_private * priv,void __user * arg)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(&alloc, arg, sizeof(alloc)))
159 return -EFAULT;
160
161 memory = agp_allocate_memory_wrap(alloc.pg_count, 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(arg, &alloc, sizeof(alloc))) {
170 agp_free_memory_wrap(memory);
171 return -EFAULT;
172 }
173 return 0;
174 }
175
compat_agpioc_bind_wrap(struct agp_file_private * priv,void __user * arg)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(&bind_info, arg, sizeof(bind_info)))
183 return -EFAULT;
184
185 memory = agp_find_mem_by_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
compat_agpioc_unbind_wrap(struct agp_file_private * priv,void __user * arg)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(&unbind, arg, sizeof(unbind)))
200 return -EFAULT;
201
202 memory = agp_find_mem_by_key(unbind.key);
203
204 if (memory == NULL)
205 return -EINVAL;
206
207 return agp_unbind_memory(memory);
208 }
209
compat_agp_ioctl(struct file * file,unsigned int cmd,unsigned long arg)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(curr_priv, (void __user *) arg);
244 break;
245
246 case AGPIOC_ACQUIRE32:
247 ret_val = agpioc_acquire_wrap(curr_priv);
248 break;
249
250 case AGPIOC_RELEASE32:
251 ret_val = agpioc_release_wrap(curr_priv);
252 break;
253
254 case AGPIOC_SETUP32:
255 ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg);
256 break;
257
258 case AGPIOC_RESERVE32:
259 ret_val = compat_agpioc_reserve_wrap(curr_priv, (void __user *) arg);
260 break;
261
262 case AGPIOC_PROTECT32:
263 ret_val = agpioc_protect_wrap(curr_priv);
264 break;
265
266 case AGPIOC_ALLOCATE32:
267 ret_val = compat_agpioc_allocate_wrap(curr_priv, (void __user *) arg);
268 break;
269
270 case AGPIOC_DEALLOCATE32:
271 ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg);
272 break;
273
274 case AGPIOC_BIND32:
275 ret_val = compat_agpioc_bind_wrap(curr_priv, (void __user *) arg);
276 break;
277
278 case AGPIOC_UNBIND32:
279 ret_val = compat_agpioc_unbind_wrap(curr_priv, (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(&(agp_fe.agp_mutex));
289 return ret_val;
290 }
291
292