Commit | Line | Data |
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1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_proc.c |
1da177e4 LT |
3 | * /proc support for DRM |
4 | * | |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> | |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | * | |
8 | * \par Acknowledgements: | |
9 | * Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix | |
10 | * the problem with the proc files not outputting all their information. | |
11 | */ | |
12 | ||
13 | /* | |
14 | * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com | |
15 | * | |
16 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | |
17 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
18 | * All Rights Reserved. | |
19 | * | |
20 | * Permission is hereby granted, free of charge, to any person obtaining a | |
21 | * copy of this software and associated documentation files (the "Software"), | |
22 | * to deal in the Software without restriction, including without limitation | |
23 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
24 | * and/or sell copies of the Software, and to permit persons to whom the | |
25 | * Software is furnished to do so, subject to the following conditions: | |
26 | * | |
27 | * The above copyright notice and this permission notice (including the next | |
28 | * paragraph) shall be included in all copies or substantial portions of the | |
29 | * Software. | |
30 | * | |
31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
32 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
33 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
34 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
35 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
36 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
37 | * OTHER DEALINGS IN THE SOFTWARE. | |
38 | */ | |
39 | ||
955b12de | 40 | #include <linux/seq_file.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
2d1a8a48 | 42 | #include <linux/export.h> |
1da177e4 LT |
43 | #include "drmP.h" |
44 | ||
955b12de BG |
45 | /*************************************************** |
46 | * Initialization, etc. | |
47 | **************************************************/ | |
1da177e4 LT |
48 | |
49 | /** | |
50 | * Proc file list. | |
51 | */ | |
955b12de | 52 | static struct drm_info_list drm_proc_list[] = { |
673a394b | 53 | {"name", drm_name_info, 0}, |
673a394b EA |
54 | {"vm", drm_vm_info, 0}, |
55 | {"clients", drm_clients_info, 0}, | |
673a394b EA |
56 | {"bufs", drm_bufs_info, 0}, |
57 | {"gem_names", drm_gem_name_info, DRIVER_GEM}, | |
1da177e4 | 58 | #if DRM_DEBUG_CODE |
955b12de | 59 | {"vma", drm_vma_info, 0}, |
1da177e4 LT |
60 | #endif |
61 | }; | |
8311d570 | 62 | #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list) |
1da177e4 | 63 | |
955b12de BG |
64 | static int drm_proc_open(struct inode *inode, struct file *file) |
65 | { | |
66 | struct drm_info_node* node = PDE(inode)->data; | |
67 | ||
68 | return single_open(file, node->info_ent->show, node); | |
69 | } | |
70 | ||
71 | static const struct file_operations drm_proc_fops = { | |
72 | .owner = THIS_MODULE, | |
73 | .open = drm_proc_open, | |
74 | .read = seq_read, | |
75 | .llseek = seq_lseek, | |
76 | .release = single_release, | |
77 | }; | |
78 | ||
79 | ||
1da177e4 | 80 | /** |
955b12de | 81 | * Initialize a given set of proc files for a device |
1da177e4 | 82 | * |
955b12de BG |
83 | * \param files The array of files to create |
84 | * \param count The number of files given | |
1da177e4 | 85 | * \param root DRI proc dir entry. |
955b12de BG |
86 | * \param minor device minor number |
87 | * \return Zero on success, non-zero on failure | |
b5e89ed5 | 88 | * |
955b12de BG |
89 | * Create a given set of proc files represented by an array of |
90 | * gdm_proc_lists in the given root directory. | |
1da177e4 | 91 | */ |
27fc4f1c | 92 | static int drm_proc_create_files(struct drm_info_list *files, int count, |
955b12de | 93 | struct proc_dir_entry *root, struct drm_minor *minor) |
1da177e4 | 94 | { |
673a394b | 95 | struct drm_device *dev = minor->dev; |
1da177e4 | 96 | struct proc_dir_entry *ent; |
955b12de | 97 | struct drm_info_node *tmp; |
955b12de | 98 | int i, ret; |
1da177e4 | 99 | |
955b12de BG |
100 | for (i = 0; i < count; i++) { |
101 | u32 features = files[i].driver_features; | |
673a394b EA |
102 | |
103 | if (features != 0 && | |
104 | (dev->driver->driver_features & features) != features) | |
105 | continue; | |
106 | ||
9a298b2a | 107 | tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL); |
1ae70072 RK |
108 | if (tmp == NULL) { |
109 | ret = -1; | |
110 | goto fail; | |
111 | } | |
3b51096f AD |
112 | tmp->minor = minor; |
113 | tmp->info_ent = &files[i]; | |
114 | list_add(&tmp->list, &minor->proc_nodes.list); | |
115 | ||
116 | ent = proc_create_data(files[i].name, S_IRUGO, root, | |
117 | &drm_proc_fops, tmp); | |
1da177e4 LT |
118 | if (!ent) { |
119 | DRM_ERROR("Cannot create /proc/dri/%s/%s\n", | |
a0f92199 | 120 | root->name, files[i].name); |
3b51096f | 121 | list_del(&tmp->list); |
9a298b2a | 122 | kfree(tmp); |
673a394b EA |
123 | ret = -1; |
124 | goto fail; | |
1da177e4 | 125 | } |
1da177e4 | 126 | |
673a394b | 127 | } |
1da177e4 | 128 | return 0; |
673a394b | 129 | |
955b12de BG |
130 | fail: |
131 | for (i = 0; i < count; i++) | |
132 | remove_proc_entry(drm_proc_list[i].name, minor->proc_root); | |
673a394b | 133 | return ret; |
1da177e4 LT |
134 | } |
135 | ||
1da177e4 | 136 | /** |
955b12de | 137 | * Initialize the DRI proc filesystem for a device |
1da177e4 | 138 | * |
955b12de BG |
139 | * \param dev DRM device |
140 | * \param minor device minor number | |
1da177e4 | 141 | * \param root DRI proc dir entry. |
955b12de BG |
142 | * \param dev_root resulting DRI device proc dir entry. |
143 | * \return root entry pointer on success, or NULL on failure. | |
1da177e4 | 144 | * |
955b12de BG |
145 | * Create the DRI proc root entry "/proc/dri", the device proc root entry |
146 | * "/proc/dri/%minor%/", and each entry in proc_list as | |
147 | * "/proc/dri/%minor%/%name%". | |
1da177e4 | 148 | */ |
955b12de BG |
149 | int drm_proc_init(struct drm_minor *minor, int minor_id, |
150 | struct proc_dir_entry *root) | |
1da177e4 | 151 | { |
1da177e4 | 152 | char name[64]; |
955b12de | 153 | int ret; |
1da177e4 | 154 | |
955b12de BG |
155 | INIT_LIST_HEAD(&minor->proc_nodes.list); |
156 | sprintf(name, "%d", minor_id); | |
157 | minor->proc_root = proc_mkdir(name, root); | |
158 | if (!minor->proc_root) { | |
159 | DRM_ERROR("Cannot create /proc/dri/%s\n", name); | |
160 | return -1; | |
1da177e4 LT |
161 | } |
162 | ||
955b12de BG |
163 | ret = drm_proc_create_files(drm_proc_list, DRM_PROC_ENTRIES, |
164 | minor->proc_root, minor); | |
165 | if (ret) { | |
166 | remove_proc_entry(name, root); | |
167 | minor->proc_root = NULL; | |
168 | DRM_ERROR("Failed to create core drm proc files\n"); | |
169 | return ret; | |
1da177e4 LT |
170 | } |
171 | ||
955b12de | 172 | return 0; |
1da177e4 LT |
173 | } |
174 | ||
27fc4f1c | 175 | static int drm_proc_remove_files(struct drm_info_list *files, int count, |
955b12de | 176 | struct drm_minor *minor) |
1da177e4 | 177 | { |
955b12de BG |
178 | struct list_head *pos, *q; |
179 | struct drm_info_node *tmp; | |
b5e89ed5 | 180 | int i; |
1da177e4 | 181 | |
955b12de BG |
182 | for (i = 0; i < count; i++) { |
183 | list_for_each_safe(pos, q, &minor->proc_nodes.list) { | |
184 | tmp = list_entry(pos, struct drm_info_node, list); | |
185 | if (tmp->info_ent == &files[i]) { | |
186 | remove_proc_entry(files[i].name, | |
187 | minor->proc_root); | |
188 | list_del(pos); | |
9a298b2a | 189 | kfree(tmp); |
955b12de BG |
190 | } |
191 | } | |
1da177e4 | 192 | } |
955b12de | 193 | return 0; |
1da177e4 LT |
194 | } |
195 | ||
fede5c91 | 196 | /** |
955b12de | 197 | * Cleanup the proc filesystem resources. |
fede5c91 | 198 | * |
955b12de BG |
199 | * \param minor device minor number. |
200 | * \param root DRI proc dir entry. | |
201 | * \param dev_root DRI device proc dir entry. | |
202 | * \return always zero. | |
b5e89ed5 | 203 | * |
955b12de | 204 | * Remove all proc entries created by proc_init(). |
1da177e4 | 205 | */ |
955b12de | 206 | int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root) |
1da177e4 | 207 | { |
955b12de | 208 | char name[64]; |
1da177e4 | 209 | |
955b12de | 210 | if (!root || !minor->proc_root) |
1da177e4 | 211 | return 0; |
1da177e4 | 212 | |
955b12de | 213 | drm_proc_remove_files(drm_proc_list, DRM_PROC_ENTRIES, minor); |
673a394b | 214 | |
955b12de BG |
215 | sprintf(name, "%d", minor->index); |
216 | remove_proc_entry(name, root); | |
673a394b | 217 | |
673a394b EA |
218 | return 0; |
219 | } | |
220 |