drm_debugfs.c revision 1.2.4.2
1 1.2.4.2 yamt /** 2 1.2.4.2 yamt * \file drm_debugfs.c 3 1.2.4.2 yamt * debugfs support for DRM 4 1.2.4.2 yamt * 5 1.2.4.2 yamt * \author Ben Gamari <bgamari (at) gmail.com> 6 1.2.4.2 yamt */ 7 1.2.4.2 yamt 8 1.2.4.2 yamt /* 9 1.2.4.2 yamt * Created: Sun Dec 21 13:08:50 2008 by bgamari (at) gmail.com 10 1.2.4.2 yamt * 11 1.2.4.2 yamt * Copyright 2008 Ben Gamari <bgamari (at) gmail.com> 12 1.2.4.2 yamt * 13 1.2.4.2 yamt * Permission is hereby granted, free of charge, to any person obtaining a 14 1.2.4.2 yamt * copy of this software and associated documentation files (the "Software"), 15 1.2.4.2 yamt * to deal in the Software without restriction, including without limitation 16 1.2.4.2 yamt * the rights to use, copy, modify, merge, publish, distribute, sublicense, 17 1.2.4.2 yamt * and/or sell copies of the Software, and to permit persons to whom the 18 1.2.4.2 yamt * Software is furnished to do so, subject to the following conditions: 19 1.2.4.2 yamt * 20 1.2.4.2 yamt * The above copyright notice and this permission notice (including the next 21 1.2.4.2 yamt * paragraph) shall be included in all copies or substantial portions of the 22 1.2.4.2 yamt * Software. 23 1.2.4.2 yamt * 24 1.2.4.2 yamt * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 25 1.2.4.2 yamt * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 26 1.2.4.2 yamt * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 27 1.2.4.2 yamt * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 28 1.2.4.2 yamt * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 29 1.2.4.2 yamt * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 30 1.2.4.2 yamt * OTHER DEALINGS IN THE SOFTWARE. 31 1.2.4.2 yamt */ 32 1.2.4.2 yamt 33 1.2.4.2 yamt #include <linux/debugfs.h> 34 1.2.4.2 yamt #include <linux/seq_file.h> 35 1.2.4.2 yamt #include <linux/slab.h> 36 1.2.4.2 yamt #include <linux/export.h> 37 1.2.4.2 yamt #include <drm/drmP.h> 38 1.2.4.2 yamt 39 1.2.4.2 yamt #if defined(CONFIG_DEBUG_FS) 40 1.2.4.2 yamt 41 1.2.4.2 yamt /*************************************************** 42 1.2.4.2 yamt * Initialization, etc. 43 1.2.4.2 yamt **************************************************/ 44 1.2.4.2 yamt 45 1.2.4.2 yamt static struct drm_info_list drm_debugfs_list[] = { 46 1.2.4.2 yamt {"name", drm_name_info, 0}, 47 1.2.4.2 yamt {"vm", drm_vm_info, 0}, 48 1.2.4.2 yamt {"clients", drm_clients_info, 0}, 49 1.2.4.2 yamt {"bufs", drm_bufs_info, 0}, 50 1.2.4.2 yamt {"gem_names", drm_gem_name_info, DRIVER_GEM}, 51 1.2.4.2 yamt #if DRM_DEBUG_CODE 52 1.2.4.2 yamt {"vma", drm_vma_info, 0}, 53 1.2.4.2 yamt #endif 54 1.2.4.2 yamt }; 55 1.2.4.2 yamt #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list) 56 1.2.4.2 yamt 57 1.2.4.2 yamt 58 1.2.4.2 yamt static int drm_debugfs_open(struct inode *inode, struct file *file) 59 1.2.4.2 yamt { 60 1.2.4.2 yamt struct drm_info_node *node = inode->i_private; 61 1.2.4.2 yamt 62 1.2.4.2 yamt return single_open(file, node->info_ent->show, node); 63 1.2.4.2 yamt } 64 1.2.4.2 yamt 65 1.2.4.2 yamt 66 1.2.4.2 yamt static const struct file_operations drm_debugfs_fops = { 67 1.2.4.2 yamt .owner = THIS_MODULE, 68 1.2.4.2 yamt .open = drm_debugfs_open, 69 1.2.4.2 yamt .read = seq_read, 70 1.2.4.2 yamt .llseek = seq_lseek, 71 1.2.4.2 yamt .release = single_release, 72 1.2.4.2 yamt }; 73 1.2.4.2 yamt 74 1.2.4.2 yamt 75 1.2.4.2 yamt /** 76 1.2.4.2 yamt * Initialize a given set of debugfs files for a device 77 1.2.4.2 yamt * 78 1.2.4.2 yamt * \param files The array of files to create 79 1.2.4.2 yamt * \param count The number of files given 80 1.2.4.2 yamt * \param root DRI debugfs dir entry. 81 1.2.4.2 yamt * \param minor device minor number 82 1.2.4.2 yamt * \return Zero on success, non-zero on failure 83 1.2.4.2 yamt * 84 1.2.4.2 yamt * Create a given set of debugfs files represented by an array of 85 1.2.4.2 yamt * gdm_debugfs_lists in the given root directory. 86 1.2.4.2 yamt */ 87 1.2.4.2 yamt int drm_debugfs_create_files(struct drm_info_list *files, int count, 88 1.2.4.2 yamt struct dentry *root, struct drm_minor *minor) 89 1.2.4.2 yamt { 90 1.2.4.2 yamt struct drm_device *dev = minor->dev; 91 1.2.4.2 yamt struct dentry *ent; 92 1.2.4.2 yamt struct drm_info_node *tmp; 93 1.2.4.2 yamt int i, ret; 94 1.2.4.2 yamt 95 1.2.4.2 yamt for (i = 0; i < count; i++) { 96 1.2.4.2 yamt u32 features = files[i].driver_features; 97 1.2.4.2 yamt 98 1.2.4.2 yamt if (features != 0 && 99 1.2.4.2 yamt (dev->driver->driver_features & features) != features) 100 1.2.4.2 yamt continue; 101 1.2.4.2 yamt 102 1.2.4.2 yamt tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL); 103 1.2.4.2 yamt if (tmp == NULL) { 104 1.2.4.2 yamt ret = -1; 105 1.2.4.2 yamt goto fail; 106 1.2.4.2 yamt } 107 1.2.4.2 yamt ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO, 108 1.2.4.2 yamt root, tmp, &drm_debugfs_fops); 109 1.2.4.2 yamt if (!ent) { 110 1.2.4.2 yamt DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s/%s\n", 111 1.2.4.2 yamt root->d_name.name, files[i].name); 112 1.2.4.2 yamt kfree(tmp); 113 1.2.4.2 yamt ret = -1; 114 1.2.4.2 yamt goto fail; 115 1.2.4.2 yamt } 116 1.2.4.2 yamt 117 1.2.4.2 yamt tmp->minor = minor; 118 1.2.4.2 yamt tmp->dent = ent; 119 1.2.4.2 yamt tmp->info_ent = &files[i]; 120 1.2.4.2 yamt 121 1.2.4.2 yamt mutex_lock(&minor->debugfs_lock); 122 1.2.4.2 yamt list_add(&tmp->list, &minor->debugfs_list); 123 1.2.4.2 yamt mutex_unlock(&minor->debugfs_lock); 124 1.2.4.2 yamt } 125 1.2.4.2 yamt return 0; 126 1.2.4.2 yamt 127 1.2.4.2 yamt fail: 128 1.2.4.2 yamt drm_debugfs_remove_files(files, count, minor); 129 1.2.4.2 yamt return ret; 130 1.2.4.2 yamt } 131 1.2.4.2 yamt EXPORT_SYMBOL(drm_debugfs_create_files); 132 1.2.4.2 yamt 133 1.2.4.2 yamt /** 134 1.2.4.2 yamt * Initialize the DRI debugfs filesystem for a device 135 1.2.4.2 yamt * 136 1.2.4.2 yamt * \param dev DRM device 137 1.2.4.2 yamt * \param minor device minor number 138 1.2.4.2 yamt * \param root DRI debugfs dir entry. 139 1.2.4.2 yamt * 140 1.2.4.2 yamt * Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry 141 1.2.4.2 yamt * "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as 142 1.2.4.2 yamt * "/sys/kernel/debug/dri/%minor%/%name%". 143 1.2.4.2 yamt */ 144 1.2.4.2 yamt int drm_debugfs_init(struct drm_minor *minor, int minor_id, 145 1.2.4.2 yamt struct dentry *root) 146 1.2.4.2 yamt { 147 1.2.4.2 yamt struct drm_device *dev = minor->dev; 148 1.2.4.2 yamt char name[64]; 149 1.2.4.2 yamt int ret; 150 1.2.4.2 yamt 151 1.2.4.2 yamt INIT_LIST_HEAD(&minor->debugfs_list); 152 1.2.4.2 yamt mutex_init(&minor->debugfs_lock); 153 1.2.4.2 yamt snprintf(name, sizeof(name), "%d", minor_id); 154 1.2.4.2 yamt minor->debugfs_root = debugfs_create_dir(name, root); 155 1.2.4.2 yamt if (!minor->debugfs_root) { 156 1.2.4.2 yamt DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name); 157 1.2.4.2 yamt return -1; 158 1.2.4.2 yamt } 159 1.2.4.2 yamt 160 1.2.4.2 yamt ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, 161 1.2.4.2 yamt minor->debugfs_root, minor); 162 1.2.4.2 yamt if (ret) { 163 1.2.4.2 yamt debugfs_remove(minor->debugfs_root); 164 1.2.4.2 yamt minor->debugfs_root = NULL; 165 1.2.4.2 yamt DRM_ERROR("Failed to create core drm debugfs files\n"); 166 1.2.4.2 yamt return ret; 167 1.2.4.2 yamt } 168 1.2.4.2 yamt 169 1.2.4.2 yamt if (dev->driver->debugfs_init) { 170 1.2.4.2 yamt ret = dev->driver->debugfs_init(minor); 171 1.2.4.2 yamt if (ret) { 172 1.2.4.2 yamt DRM_ERROR("DRM: Driver failed to initialize " 173 1.2.4.2 yamt "/sys/kernel/debug/dri.\n"); 174 1.2.4.2 yamt return ret; 175 1.2.4.2 yamt } 176 1.2.4.2 yamt } 177 1.2.4.2 yamt return 0; 178 1.2.4.2 yamt } 179 1.2.4.2 yamt 180 1.2.4.2 yamt 181 1.2.4.2 yamt /** 182 1.2.4.2 yamt * Remove a list of debugfs files 183 1.2.4.2 yamt * 184 1.2.4.2 yamt * \param files The list of files 185 1.2.4.2 yamt * \param count The number of files 186 1.2.4.2 yamt * \param minor The minor of which we should remove the files 187 1.2.4.2 yamt * \return always zero. 188 1.2.4.2 yamt * 189 1.2.4.2 yamt * Remove all debugfs entries created by debugfs_init(). 190 1.2.4.2 yamt */ 191 1.2.4.2 yamt int drm_debugfs_remove_files(struct drm_info_list *files, int count, 192 1.2.4.2 yamt struct drm_minor *minor) 193 1.2.4.2 yamt { 194 1.2.4.2 yamt struct list_head *pos, *q; 195 1.2.4.2 yamt struct drm_info_node *tmp; 196 1.2.4.2 yamt int i; 197 1.2.4.2 yamt 198 1.2.4.2 yamt mutex_lock(&minor->debugfs_lock); 199 1.2.4.2 yamt for (i = 0; i < count; i++) { 200 1.2.4.2 yamt list_for_each_safe(pos, q, &minor->debugfs_list) { 201 1.2.4.2 yamt tmp = list_entry(pos, struct drm_info_node, list); 202 1.2.4.2 yamt if (tmp->info_ent == &files[i]) { 203 1.2.4.2 yamt debugfs_remove(tmp->dent); 204 1.2.4.2 yamt list_del(pos); 205 1.2.4.2 yamt kfree(tmp); 206 1.2.4.2 yamt } 207 1.2.4.2 yamt } 208 1.2.4.2 yamt } 209 1.2.4.2 yamt mutex_unlock(&minor->debugfs_lock); 210 1.2.4.2 yamt return 0; 211 1.2.4.2 yamt } 212 1.2.4.2 yamt EXPORT_SYMBOL(drm_debugfs_remove_files); 213 1.2.4.2 yamt 214 1.2.4.2 yamt /** 215 1.2.4.2 yamt * Cleanup the debugfs filesystem resources. 216 1.2.4.2 yamt * 217 1.2.4.2 yamt * \param minor device minor number. 218 1.2.4.2 yamt * \return always zero. 219 1.2.4.2 yamt * 220 1.2.4.2 yamt * Remove all debugfs entries created by debugfs_init(). 221 1.2.4.2 yamt */ 222 1.2.4.2 yamt int drm_debugfs_cleanup(struct drm_minor *minor) 223 1.2.4.2 yamt { 224 1.2.4.2 yamt struct drm_device *dev = minor->dev; 225 1.2.4.2 yamt 226 1.2.4.2 yamt if (!minor->debugfs_root) 227 1.2.4.2 yamt return 0; 228 1.2.4.2 yamt 229 1.2.4.2 yamt if (dev->driver->debugfs_cleanup) 230 1.2.4.2 yamt dev->driver->debugfs_cleanup(minor); 231 1.2.4.2 yamt 232 1.2.4.2 yamt drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor); 233 1.2.4.2 yamt 234 1.2.4.2 yamt debugfs_remove(minor->debugfs_root); 235 1.2.4.2 yamt minor->debugfs_root = NULL; 236 1.2.4.2 yamt 237 1.2.4.2 yamt return 0; 238 1.2.4.2 yamt } 239 1.2.4.2 yamt 240 1.2.4.2 yamt #endif /* CONFIG_DEBUG_FS */ 241 1.2.4.2 yamt 242
Indexes created Tue Oct 14 15:09:51 GMT 2025