1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013-2016 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #ifdef CONFIG_DEBUG_FS 8 9 #include <linux/debugfs.h> 10 11 #include <drm/drm_debugfs.h> 12 #include <drm/drm_file.h> 13 14 #include "msm_drv.h" 15 #include "msm_gpu.h" 16 #include "msm_kms.h" 17 #include "msm_debugfs.h" 18 19 struct msm_gpu_show_priv { 20 struct msm_gpu_state *state; 21 struct drm_device *dev; 22 }; 23 24 static int msm_gpu_show(struct seq_file *m, void *arg) 25 { 26 struct drm_printer p = drm_seq_file_printer(m); 27 struct msm_gpu_show_priv *show_priv = m->private; 28 struct msm_drm_private *priv = show_priv->dev->dev_private; 29 struct msm_gpu *gpu = priv->gpu; 30 int ret; 31 32 ret = mutex_lock_interruptible(&show_priv->dev->struct_mutex); 33 if (ret) 34 return ret; 35 36 drm_printf(&p, "%s Status:\n", gpu->name); 37 gpu->funcs->show(gpu, show_priv->state, &p); 38 39 mutex_unlock(&show_priv->dev->struct_mutex); 40 41 return 0; 42 } 43 44 static int msm_gpu_release(struct inode *inode, struct file *file) 45 { 46 struct seq_file *m = file->private_data; 47 struct msm_gpu_show_priv *show_priv = m->private; 48 struct msm_drm_private *priv = show_priv->dev->dev_private; 49 struct msm_gpu *gpu = priv->gpu; 50 int ret; 51 52 ret = mutex_lock_interruptible(&show_priv->dev->struct_mutex); 53 if (ret) 54 return ret; 55 56 gpu->funcs->gpu_state_put(show_priv->state); 57 mutex_unlock(&show_priv->dev->struct_mutex); 58 59 kfree(show_priv); 60 61 return single_release(inode, file); 62 } 63 64 static int msm_gpu_open(struct inode *inode, struct file *file) 65 { 66 struct drm_device *dev = inode->i_private; 67 struct msm_drm_private *priv = dev->dev_private; 68 struct msm_gpu *gpu = priv->gpu; 69 struct msm_gpu_show_priv *show_priv; 70 int ret; 71 72 if (!gpu || !gpu->funcs->gpu_state_get) 73 return -ENODEV; 74 75 show_priv = kmalloc(sizeof(*show_priv), GFP_KERNEL); 76 if (!show_priv) 77 return -ENOMEM; 78 79 ret = mutex_lock_interruptible(&dev->struct_mutex); 80 if (ret) 81 goto free_priv; 82 83 pm_runtime_get_sync(&gpu->pdev->dev); 84 show_priv->state = gpu->funcs->gpu_state_get(gpu); 85 pm_runtime_put_sync(&gpu->pdev->dev); 86 87 mutex_unlock(&dev->struct_mutex); 88 89 if (IS_ERR(show_priv->state)) { 90 ret = PTR_ERR(show_priv->state); 91 goto free_priv; 92 } 93 94 show_priv->dev = dev; 95 96 ret = single_open(file, msm_gpu_show, show_priv); 97 if (ret) 98 goto free_priv; 99 100 return 0; 101 102 free_priv: 103 kfree(show_priv); 104 return ret; 105 } 106 107 static const struct file_operations msm_gpu_fops = { 108 .owner = THIS_MODULE, 109 .open = msm_gpu_open, 110 .read = seq_read, 111 .llseek = seq_lseek, 112 .release = msm_gpu_release, 113 }; 114 115 static int msm_gem_show(struct drm_device *dev, struct seq_file *m) 116 { 117 struct msm_drm_private *priv = dev->dev_private; 118 struct msm_gpu *gpu = priv->gpu; 119 120 if (gpu) { 121 seq_printf(m, "Active Objects (%s):\n", gpu->name); 122 msm_gem_describe_objects(&gpu->active_list, m); 123 } 124 125 seq_printf(m, "Inactive Objects:\n"); 126 msm_gem_describe_objects(&priv->inactive_list, m); 127 128 return 0; 129 } 130 131 static int msm_mm_show(struct drm_device *dev, struct seq_file *m) 132 { 133 struct drm_printer p = drm_seq_file_printer(m); 134 135 drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p); 136 137 return 0; 138 } 139 140 static int msm_fb_show(struct drm_device *dev, struct seq_file *m) 141 { 142 struct msm_drm_private *priv = dev->dev_private; 143 struct drm_framebuffer *fb, *fbdev_fb = NULL; 144 145 if (priv->fbdev) { 146 seq_printf(m, "fbcon "); 147 fbdev_fb = priv->fbdev->fb; 148 msm_framebuffer_describe(fbdev_fb, m); 149 } 150 151 mutex_lock(&dev->mode_config.fb_lock); 152 list_for_each_entry(fb, &dev->mode_config.fb_list, head) { 153 if (fb == fbdev_fb) 154 continue; 155 156 seq_printf(m, "user "); 157 msm_framebuffer_describe(fb, m); 158 } 159 mutex_unlock(&dev->mode_config.fb_lock); 160 161 return 0; 162 } 163 164 static int show_locked(struct seq_file *m, void *arg) 165 { 166 struct drm_info_node *node = (struct drm_info_node *) m->private; 167 struct drm_device *dev = node->minor->dev; 168 int (*show)(struct drm_device *dev, struct seq_file *m) = 169 node->info_ent->data; 170 int ret; 171 172 ret = mutex_lock_interruptible(&dev->struct_mutex); 173 if (ret) 174 return ret; 175 176 ret = show(dev, m); 177 178 mutex_unlock(&dev->struct_mutex); 179 180 return ret; 181 } 182 183 static struct drm_info_list msm_debugfs_list[] = { 184 {"gem", show_locked, 0, msm_gem_show}, 185 { "mm", show_locked, 0, msm_mm_show }, 186 { "fb", show_locked, 0, msm_fb_show }, 187 }; 188 189 static int late_init_minor(struct drm_minor *minor) 190 { 191 int ret; 192 193 if (!minor) 194 return 0; 195 196 ret = msm_rd_debugfs_init(minor); 197 if (ret) { 198 DRM_DEV_ERROR(minor->dev->dev, "could not install rd debugfs\n"); 199 return ret; 200 } 201 202 ret = msm_perf_debugfs_init(minor); 203 if (ret) { 204 DRM_DEV_ERROR(minor->dev->dev, "could not install perf debugfs\n"); 205 return ret; 206 } 207 208 return 0; 209 } 210 211 int msm_debugfs_late_init(struct drm_device *dev) 212 { 213 int ret; 214 ret = late_init_minor(dev->primary); 215 if (ret) 216 return ret; 217 ret = late_init_minor(dev->render); 218 return ret; 219 } 220 221 int msm_debugfs_init(struct drm_minor *minor) 222 { 223 struct drm_device *dev = minor->dev; 224 struct msm_drm_private *priv = dev->dev_private; 225 int ret; 226 227 ret = drm_debugfs_create_files(msm_debugfs_list, 228 ARRAY_SIZE(msm_debugfs_list), 229 minor->debugfs_root, minor); 230 231 if (ret) { 232 DRM_DEV_ERROR(dev->dev, "could not install msm_debugfs_list\n"); 233 return ret; 234 } 235 236 debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root, 237 dev, &msm_gpu_fops); 238 239 if (priv->kms && priv->kms->funcs->debugfs_init) { 240 ret = priv->kms->funcs->debugfs_init(priv->kms, minor); 241 if (ret) 242 return ret; 243 } 244 245 return ret; 246 } 247 #endif 248 249