drivers/gpu/drm/msm/msm_debugfs.c

   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