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 #include <linux/fault-inject.h> 11 12 #include <drm/drm_debugfs.h> 13 #include <drm/drm_fb_helper.h> 14 #include <drm/drm_file.h> 15 #include <drm/drm_framebuffer.h> 16 17 #include "msm_drv.h" 18 #include "msm_gpu.h" 19 #include "msm_kms.h" 20 #include "msm_debugfs.h" 21 #include "disp/msm_disp_snapshot.h" 22 23 /* 24 * GPU Snapshot: 25 */ 26 27 struct msm_gpu_show_priv { 28 struct msm_gpu_state *state; 29 struct drm_device *dev; 30 }; 31 32 static int msm_gpu_show(struct seq_file *m, void *arg) 33 { 34 struct drm_printer p = drm_seq_file_printer(m); 35 struct msm_gpu_show_priv *show_priv = m->private; 36 struct msm_drm_private *priv = show_priv->dev->dev_private; 37 struct msm_gpu *gpu = priv->gpu; 38 int ret; 39 40 ret = mutex_lock_interruptible(&gpu->lock); 41 if (ret) 42 return ret; 43 44 drm_printf(&p, "%s Status:\n", gpu->name); 45 gpu->funcs->show(gpu, show_priv->state, &p); 46 47 mutex_unlock(&gpu->lock); 48 49 return 0; 50 } 51 52 static int msm_gpu_release(struct inode *inode, struct file *file) 53 { 54 struct seq_file *m = file->private_data; 55 struct msm_gpu_show_priv *show_priv = m->private; 56 struct msm_drm_private *priv = show_priv->dev->dev_private; 57 struct msm_gpu *gpu = priv->gpu; 58 59 mutex_lock(&gpu->lock); 60 gpu->funcs->gpu_state_put(show_priv->state); 61 mutex_unlock(&gpu->lock); 62 63 kfree(show_priv); 64 65 return single_release(inode, file); 66 } 67 68 static int msm_gpu_open(struct inode *inode, struct file *file) 69 { 70 struct drm_device *dev = inode->i_private; 71 struct msm_drm_private *priv = dev->dev_private; 72 struct msm_gpu *gpu = priv->gpu; 73 struct msm_gpu_show_priv *show_priv; 74 int ret; 75 76 if (!gpu || !gpu->funcs->gpu_state_get) 77 return -ENODEV; 78 79 show_priv = kmalloc(sizeof(*show_priv), GFP_KERNEL); 80 if (!show_priv) 81 return -ENOMEM; 82 83 ret = mutex_lock_interruptible(&gpu->lock); 84 if (ret) 85 goto free_priv; 86 87 pm_runtime_get_sync(&gpu->pdev->dev); 88 msm_gpu_hw_init(gpu); 89 show_priv->state = gpu->funcs->gpu_state_get(gpu); 90 pm_runtime_put_sync(&gpu->pdev->dev); 91 92 mutex_unlock(&gpu->lock); 93 94 if (IS_ERR(show_priv->state)) { 95 ret = PTR_ERR(show_priv->state); 96 goto free_priv; 97 } 98 99 show_priv->dev = dev; 100 101 ret = single_open(file, msm_gpu_show, show_priv); 102 if (ret) 103 goto free_priv; 104 105 return 0; 106 107 free_priv: 108 kfree(show_priv); 109 return ret; 110 } 111 112 static const struct file_operations msm_gpu_fops = { 113 .owner = THIS_MODULE, 114 .open = msm_gpu_open, 115 .read = seq_read, 116 .llseek = seq_lseek, 117 .release = msm_gpu_release, 118 }; 119 120 /* 121 * Display Snapshot: 122 */ 123 124 static int msm_kms_show(struct seq_file *m, void *arg) 125 { 126 struct drm_printer p = drm_seq_file_printer(m); 127 struct msm_disp_state *state = m->private; 128 129 msm_disp_state_print(state, &p); 130 131 return 0; 132 } 133 134 static int msm_kms_release(struct inode *inode, struct file *file) 135 { 136 struct seq_file *m = file->private_data; 137 struct msm_disp_state *state = m->private; 138 139 msm_disp_state_free(state); 140 141 return single_release(inode, file); 142 } 143 144 static int msm_kms_open(struct inode *inode, struct file *file) 145 { 146 struct drm_device *dev = inode->i_private; 147 struct msm_drm_private *priv = dev->dev_private; 148 struct msm_disp_state *state; 149 int ret; 150 151 if (!priv->kms) 152 return -ENODEV; 153 154 ret = mutex_lock_interruptible(&priv->kms->dump_mutex); 155 if (ret) 156 return ret; 157 158 state = msm_disp_snapshot_state_sync(priv->kms); 159 160 mutex_unlock(&priv->kms->dump_mutex); 161 162 if (IS_ERR(state)) { 163 return PTR_ERR(state); 164 } 165 166 ret = single_open(file, msm_kms_show, state); 167 if (ret) { 168 msm_disp_state_free(state); 169 return ret; 170 } 171 172 return 0; 173 } 174 175 static const struct file_operations msm_kms_fops = { 176 .owner = THIS_MODULE, 177 .open = msm_kms_open, 178 .read = seq_read, 179 .llseek = seq_lseek, 180 .release = msm_kms_release, 181 }; 182 183 /* 184 * Other debugfs: 185 */ 186 187 static unsigned long last_shrink_freed; 188 189 static int 190 shrink_get(void *data, u64 *val) 191 { 192 *val = last_shrink_freed; 193 194 return 0; 195 } 196 197 static int 198 shrink_set(void *data, u64 val) 199 { 200 struct drm_device *dev = data; 201 202 last_shrink_freed = msm_gem_shrinker_shrink(dev, val); 203 204 return 0; 205 } 206 207 DEFINE_DEBUGFS_ATTRIBUTE(shrink_fops, 208 shrink_get, shrink_set, 209 "0x%08llx\n"); 210 211 212 static int msm_gem_show(struct seq_file *m, void *arg) 213 { 214 struct drm_info_node *node = m->private; 215 struct drm_device *dev = node->minor->dev; 216 struct msm_drm_private *priv = dev->dev_private; 217 int ret; 218 219 ret = mutex_lock_interruptible(&priv->obj_lock); 220 if (ret) 221 return ret; 222 223 msm_gem_describe_objects(&priv->objects, m); 224 225 mutex_unlock(&priv->obj_lock); 226 227 return 0; 228 } 229 230 static int msm_mm_show(struct seq_file *m, void *arg) 231 { 232 struct drm_info_node *node = m->private; 233 struct drm_device *dev = node->minor->dev; 234 struct drm_printer p = drm_seq_file_printer(m); 235 236 drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p); 237 238 return 0; 239 } 240 241 static int msm_fb_show(struct seq_file *m, void *arg) 242 { 243 struct drm_info_node *node = m->private; 244 struct drm_device *dev = node->minor->dev; 245 struct drm_framebuffer *fb, *fbdev_fb = NULL; 246 247 if (dev->fb_helper && dev->fb_helper->fb) { 248 seq_printf(m, "fbcon "); 249 fbdev_fb = dev->fb_helper->fb; 250 msm_framebuffer_describe(fbdev_fb, m); 251 } 252 253 mutex_lock(&dev->mode_config.fb_lock); 254 list_for_each_entry(fb, &dev->mode_config.fb_list, head) { 255 if (fb == fbdev_fb) 256 continue; 257 258 seq_printf(m, "user "); 259 msm_framebuffer_describe(fb, m); 260 } 261 mutex_unlock(&dev->mode_config.fb_lock); 262 263 return 0; 264 } 265 266 static struct drm_info_list msm_debugfs_list[] = { 267 {"gem", msm_gem_show}, 268 { "mm", msm_mm_show }, 269 }; 270 271 static struct drm_info_list msm_kms_debugfs_list[] = { 272 { "fb", msm_fb_show }, 273 }; 274 275 static int late_init_minor(struct drm_minor *minor) 276 { 277 int ret; 278 279 if (!minor) 280 return 0; 281 282 ret = msm_rd_debugfs_init(minor); 283 if (ret) { 284 DRM_DEV_ERROR(minor->dev->dev, "could not install rd debugfs\n"); 285 return ret; 286 } 287 288 ret = msm_perf_debugfs_init(minor); 289 if (ret) { 290 DRM_DEV_ERROR(minor->dev->dev, "could not install perf debugfs\n"); 291 return ret; 292 } 293 294 return 0; 295 } 296 297 int msm_debugfs_late_init(struct drm_device *dev) 298 { 299 int ret; 300 ret = late_init_minor(dev->primary); 301 if (ret) 302 return ret; 303 ret = late_init_minor(dev->render); 304 return ret; 305 } 306 307 static void msm_debugfs_gpu_init(struct drm_minor *minor) 308 { 309 struct drm_device *dev = minor->dev; 310 struct msm_drm_private *priv = dev->dev_private; 311 struct dentry *gpu_devfreq; 312 313 debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root, 314 dev, &msm_gpu_fops); 315 316 debugfs_create_u32("hangcheck_period_ms", 0600, minor->debugfs_root, 317 &priv->hangcheck_period); 318 319 debugfs_create_bool("disable_err_irq", 0600, minor->debugfs_root, 320 &priv->disable_err_irq); 321 322 gpu_devfreq = debugfs_create_dir("devfreq", minor->debugfs_root); 323 324 debugfs_create_bool("idle_clamp",0600, gpu_devfreq, 325 &priv->gpu_clamp_to_idle); 326 327 debugfs_create_u32("upthreshold",0600, gpu_devfreq, 328 &priv->gpu_devfreq_config.upthreshold); 329 330 debugfs_create_u32("downdifferential",0600, gpu_devfreq, 331 &priv->gpu_devfreq_config.downdifferential); 332 } 333 334 void msm_debugfs_init(struct drm_minor *minor) 335 { 336 struct drm_device *dev = minor->dev; 337 struct msm_drm_private *priv = dev->dev_private; 338 339 drm_debugfs_create_files(msm_debugfs_list, 340 ARRAY_SIZE(msm_debugfs_list), 341 minor->debugfs_root, minor); 342 343 if (priv->gpu_pdev) 344 msm_debugfs_gpu_init(minor); 345 346 if (priv->kms) { 347 drm_debugfs_create_files(msm_kms_debugfs_list, 348 ARRAY_SIZE(msm_kms_debugfs_list), 349 minor->debugfs_root, minor); 350 debugfs_create_file("kms", S_IRUSR, minor->debugfs_root, 351 dev, &msm_kms_fops); 352 } 353 354 debugfs_create_file("shrink", S_IRWXU, minor->debugfs_root, 355 dev, &shrink_fops); 356 357 if (priv->kms && priv->kms->funcs->debugfs_init) 358 priv->kms->funcs->debugfs_init(priv->kms, minor); 359 360 #ifdef CONFIG_FAULT_INJECTION 361 fault_create_debugfs_attr("fail_gem_alloc", minor->debugfs_root, 362 &fail_gem_alloc); 363 fault_create_debugfs_attr("fail_gem_iova", minor->debugfs_root, 364 &fail_gem_iova); 365 #endif 366 } 367 #endif 368 369