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> |
760285e7 | 43 | #include <drm/drmP.h> |
1da177e4 | 44 | |
955b12de BG |
45 | /*************************************************** |
46 | * Initialization, etc. | |
47 | **************************************************/ | |
1da177e4 LT |
48 | |
49 | /** | |
50 | * Proc file list. | |
51 | */ | |
ce089b54 | 52 | static const 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 | { | |
d9dda78b | 66 | struct drm_info_node* node = PDE_DATA(inode); |
955b12de BG |
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 | */ |
ce089b54 | 92 | static int drm_proc_create_files(const 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; |
8bc742e1 | 98 | int i; |
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); |
8bc742e1 DH |
108 | if (!tmp) |
109 | return -1; | |
110 | ||
3b51096f AD |
111 | tmp->minor = minor; |
112 | tmp->info_ent = &files[i]; | |
113 | list_add(&tmp->list, &minor->proc_nodes.list); | |
114 | ||
115 | ent = proc_create_data(files[i].name, S_IRUGO, root, | |
116 | &drm_proc_fops, tmp); | |
1da177e4 | 117 | if (!ent) { |
b63e6aa5 DH |
118 | DRM_ERROR("Cannot create /proc/dri/%u/%s\n", |
119 | minor->index, files[i].name); | |
3b51096f | 120 | list_del(&tmp->list); |
9a298b2a | 121 | kfree(tmp); |
8bc742e1 | 122 | return -1; |
1da177e4 | 123 | } |
673a394b | 124 | } |
1da177e4 LT |
125 | return 0; |
126 | } | |
127 | ||
1da177e4 | 128 | /** |
955b12de | 129 | * Initialize the DRI proc filesystem for a device |
1da177e4 | 130 | * |
955b12de | 131 | * \param dev DRM device |
1da177e4 | 132 | * \param root DRI proc dir entry. |
955b12de BG |
133 | * \param dev_root resulting DRI device proc dir entry. |
134 | * \return root entry pointer on success, or NULL on failure. | |
1da177e4 | 135 | * |
955b12de BG |
136 | * Create the DRI proc root entry "/proc/dri", the device proc root entry |
137 | * "/proc/dri/%minor%/", and each entry in proc_list as | |
138 | * "/proc/dri/%minor%/%name%". | |
1da177e4 | 139 | */ |
b63e6aa5 | 140 | int drm_proc_init(struct drm_minor *minor, struct proc_dir_entry *root) |
1da177e4 | 141 | { |
b63e6aa5 | 142 | char name[12]; |
955b12de | 143 | int ret; |
1da177e4 | 144 | |
955b12de | 145 | INIT_LIST_HEAD(&minor->proc_nodes.list); |
b63e6aa5 | 146 | sprintf(name, "%u", minor->index); |
955b12de BG |
147 | minor->proc_root = proc_mkdir(name, root); |
148 | if (!minor->proc_root) { | |
149 | DRM_ERROR("Cannot create /proc/dri/%s\n", name); | |
150 | return -1; | |
1da177e4 LT |
151 | } |
152 | ||
955b12de BG |
153 | ret = drm_proc_create_files(drm_proc_list, DRM_PROC_ENTRIES, |
154 | minor->proc_root, minor); | |
155 | if (ret) { | |
8bc742e1 | 156 | remove_proc_subtree(name, root); |
955b12de BG |
157 | minor->proc_root = NULL; |
158 | DRM_ERROR("Failed to create core drm proc files\n"); | |
159 | return ret; | |
1da177e4 LT |
160 | } |
161 | ||
955b12de | 162 | return 0; |
1da177e4 LT |
163 | } |
164 | ||
ce089b54 | 165 | static int drm_proc_remove_files(const struct drm_info_list *files, int count, |
955b12de | 166 | struct drm_minor *minor) |
1da177e4 | 167 | { |
955b12de BG |
168 | struct list_head *pos, *q; |
169 | struct drm_info_node *tmp; | |
b5e89ed5 | 170 | int i; |
1da177e4 | 171 | |
955b12de BG |
172 | for (i = 0; i < count; i++) { |
173 | list_for_each_safe(pos, q, &minor->proc_nodes.list) { | |
174 | tmp = list_entry(pos, struct drm_info_node, list); | |
175 | if (tmp->info_ent == &files[i]) { | |
176 | remove_proc_entry(files[i].name, | |
177 | minor->proc_root); | |
178 | list_del(pos); | |
9a298b2a | 179 | kfree(tmp); |
955b12de BG |
180 | } |
181 | } | |
1da177e4 | 182 | } |
955b12de | 183 | return 0; |
1da177e4 LT |
184 | } |
185 | ||
fede5c91 | 186 | /** |
955b12de | 187 | * Cleanup the proc filesystem resources. |
fede5c91 | 188 | * |
955b12de BG |
189 | * \param minor device minor number. |
190 | * \param root DRI proc dir entry. | |
191 | * \param dev_root DRI device proc dir entry. | |
192 | * \return always zero. | |
b5e89ed5 | 193 | * |
955b12de | 194 | * Remove all proc entries created by proc_init(). |
1da177e4 | 195 | */ |
955b12de | 196 | int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root) |
1da177e4 | 197 | { |
955b12de | 198 | char name[64]; |
1da177e4 | 199 | |
955b12de | 200 | if (!root || !minor->proc_root) |
1da177e4 | 201 | return 0; |
1da177e4 | 202 | |
955b12de | 203 | drm_proc_remove_files(drm_proc_list, DRM_PROC_ENTRIES, minor); |
673a394b | 204 | |
955b12de | 205 | sprintf(name, "%d", minor->index); |
8bc742e1 | 206 | remove_proc_subtree(name, root); |
673a394b EA |
207 | return 0; |
208 | } | |
209 |