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 <[email protected]>
   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