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