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 51 mutex_lock(&show_priv->dev->struct_mutex); 52 gpu->funcs->gpu_state_put(show_priv->state); 53 mutex_unlock(&show_priv->dev->struct_mutex); 54 55 kfree(show_priv); 56 57 return single_release(inode, file); 58 } 59 60 static int msm_gpu_open(struct inode *inode, struct file *file) 61 { 62 struct drm_device *dev = inode->i_private; 63 struct msm_drm_private *priv = dev->dev_private; 64 struct msm_gpu *gpu = priv->gpu; 65 struct msm_gpu_show_priv *show_priv; 66 int ret; 67 68 if (!gpu || !gpu->funcs->gpu_state_get) 69 return -ENODEV; 70 71 show_priv = kmalloc(sizeof(*show_priv), GFP_KERNEL); 72 if (!show_priv) 73 return -ENOMEM; 74 75 ret = mutex_lock_interruptible(&dev->struct_mutex); 76 if (ret) 77 goto free_priv; 78 79 pm_runtime_get_sync(&gpu->pdev->dev); 80 show_priv->state = gpu->funcs->gpu_state_get(gpu); 81 pm_runtime_put_sync(&gpu->pdev->dev); 82 83 mutex_unlock(&dev->struct_mutex); 84 85 if (IS_ERR(show_priv->state)) { 86 ret = PTR_ERR(show_priv->state); 87 goto free_priv; 88 } 89 90 show_priv->dev = dev; 91 92 ret = single_open(file, msm_gpu_show, show_priv); 93 if (ret) 94 goto free_priv; 95 96 return 0; 97 98 free_priv: 99 kfree(show_priv); 100 return ret; 101 } 102 103 static const struct file_operations msm_gpu_fops = { 104 .owner = THIS_MODULE, 105 .open = msm_gpu_open, 106 .read = seq_read, 107 .llseek = seq_lseek, 108 .release = msm_gpu_release, 109 }; 110 111 static unsigned long last_shrink_freed; 112 113 static int 114 shrink_get(void *data, u64 *val) 115 { 116 *val = last_shrink_freed; 117 118 return 0; 119 } 120 121 static int 122 shrink_set(void *data, u64 val) 123 { 124 struct drm_device *dev = data; 125 126 last_shrink_freed = msm_gem_shrinker_shrink(dev, val); 127 128 return 0; 129 } 130 131 DEFINE_SIMPLE_ATTRIBUTE(shrink_fops, 132 shrink_get, shrink_set, 133 "0x%08llx\n"); 134 135 136 static int msm_gem_show(struct drm_device *dev, struct seq_file *m) 137 { 138 struct msm_drm_private *priv = dev->dev_private; 139 int ret; 140 141 ret = mutex_lock_interruptible(&priv->obj_lock); 142 if (ret) 143 return ret; 144 145 msm_gem_describe_objects(&priv->objects, m); 146 147 mutex_unlock(&priv->obj_lock); 148 149 return 0; 150 } 151 152 static int msm_mm_show(struct drm_device *dev, struct seq_file *m) 153 { 154 struct drm_printer p = drm_seq_file_printer(m); 155 156 drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p); 157 158 return 0; 159 } 160 161 static int msm_fb_show(struct drm_device *dev, struct seq_file *m) 162 { 163 struct msm_drm_private *priv = dev->dev_private; 164 struct drm_framebuffer *fb, *fbdev_fb = NULL; 165 166 if (priv->fbdev) { 167 seq_printf(m, "fbcon "); 168 fbdev_fb = priv->fbdev->fb; 169 msm_framebuffer_describe(fbdev_fb, m); 170 } 171 172 mutex_lock(&dev->mode_config.fb_lock); 173 list_for_each_entry(fb, &dev->mode_config.fb_list, head) { 174 if (fb == fbdev_fb) 175 continue; 176 177 seq_printf(m, "user "); 178 msm_framebuffer_describe(fb, m); 179 } 180 mutex_unlock(&dev->mode_config.fb_lock); 181 182 return 0; 183 } 184 185 static int show_locked(struct seq_file *m, void *arg) 186 { 187 struct drm_info_node *node = (struct drm_info_node *) m->private; 188 struct drm_device *dev = node->minor->dev; 189 int (*show)(struct drm_device *dev, struct seq_file *m) = 190 node->info_ent->data; 191 int ret; 192 193 ret = mutex_lock_interruptible(&dev->struct_mutex); 194 if (ret) 195 return ret; 196 197 ret = show(dev, m); 198 199 mutex_unlock(&dev->struct_mutex); 200 201 return ret; 202 } 203 204 static struct drm_info_list msm_debugfs_list[] = { 205 {"gem", show_locked, 0, msm_gem_show}, 206 { "mm", show_locked, 0, msm_mm_show }, 207 { "fb", show_locked, 0, msm_fb_show }, 208 }; 209 210 static int late_init_minor(struct drm_minor *minor) 211 { 212 int ret; 213 214 if (!minor) 215 return 0; 216 217 ret = msm_rd_debugfs_init(minor); 218 if (ret) { 219 DRM_DEV_ERROR(minor->dev->dev, "could not install rd debugfs\n"); 220 return ret; 221 } 222 223 ret = msm_perf_debugfs_init(minor); 224 if (ret) { 225 DRM_DEV_ERROR(minor->dev->dev, "could not install perf debugfs\n"); 226 return ret; 227 } 228 229 return 0; 230 } 231 232 int msm_debugfs_late_init(struct drm_device *dev) 233 { 234 int ret; 235 ret = late_init_minor(dev->primary); 236 if (ret) 237 return ret; 238 ret = late_init_minor(dev->render); 239 return ret; 240 } 241 242 void msm_debugfs_init(struct drm_minor *minor) 243 { 244 struct drm_device *dev = minor->dev; 245 struct msm_drm_private *priv = dev->dev_private; 246 247 drm_debugfs_create_files(msm_debugfs_list, 248 ARRAY_SIZE(msm_debugfs_list), 249 minor->debugfs_root, minor); 250 251 debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root, 252 dev, &msm_gpu_fops); 253 254 debugfs_create_u32("hangcheck_period_ms", 0600, minor->debugfs_root, 255 &priv->hangcheck_period); 256 257 debugfs_create_file("shrink", S_IRWXU, minor->debugfs_root, 258 dev, &shrink_fops); 259 260 if (priv->kms && priv->kms->funcs->debugfs_init) 261 priv->kms->funcs->debugfs_init(priv->kms, minor); 262 } 263 #endif 264 265