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
  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 int msm_gem_show(struct drm_device *dev, struct seq_file *m)
 112 {
 113         struct msm_drm_private *priv = dev->dev_private;
 114         struct msm_gpu *gpu = priv->gpu;
 115
 116         if (gpu) {
 117                 seq_printf(m, "Active Objects (%s):\n", gpu->name);
 118                 msm_gem_describe_objects(&gpu->active_list, m);
 119         }
 120
 121         seq_printf(m, "Inactive Objects:\n");
 122         msm_gem_describe_objects(&priv->inactive_list, m);
 123
 124         return 0;
 125 }
 126
 127 static int msm_mm_show(struct drm_device *dev, struct seq_file *m)
 128 {
 129         struct drm_printer p = drm_seq_file_printer(m);
 130
 131         drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
 132
 133         return 0;
 134 }
 135
 136 static int msm_fb_show(struct drm_device *dev, struct seq_file *m)
 137 {
 138         struct msm_drm_private *priv = dev->dev_private;
 139         struct drm_framebuffer *fb, *fbdev_fb = NULL;
 140
 141         if (priv->fbdev) {
 142                 seq_printf(m, "fbcon ");
 143                 fbdev_fb = priv->fbdev->fb;
 144                 msm_framebuffer_describe(fbdev_fb, m);
 145         }
 146
 147         mutex_lock(&dev->mode_config.fb_lock);
 148         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 149                 if (fb == fbdev_fb)
 150                         continue;
 151
 152                 seq_printf(m, "user ");
 153                 msm_framebuffer_describe(fb, m);
 154         }
 155         mutex_unlock(&dev->mode_config.fb_lock);
 156
 157         return 0;
 158 }
 159
 160 static int show_locked(struct seq_file *m, void *arg)
 161 {
 162         struct drm_info_node *node = (struct drm_info_node *) m->private;
 163         struct drm_device *dev = node->minor->dev;
 164         int (*show)(struct drm_device *dev, struct seq_file *m) =
 165                         node->info_ent->data;
 166         int ret;
 167
 168         ret = mutex_lock_interruptible(&dev->struct_mutex);
 169         if (ret)
 170                 return ret;
 171
 172         ret = show(dev, m);
 173
 174         mutex_unlock(&dev->struct_mutex);
 175
 176         return ret;
 177 }
 178
 179 static struct drm_info_list msm_debugfs_list[] = {
 180                 {"gem", show_locked, 0, msm_gem_show},
 181                 { "mm", show_locked, 0, msm_mm_show },
 182                 { "fb", show_locked, 0, msm_fb_show },
 183 };
 184
 185 static int late_init_minor(struct drm_minor *minor)
 186 {
 187         int ret;
 188
 189         if (!minor)
 190                 return 0;
 191
 192         ret = msm_rd_debugfs_init(minor);
 193         if (ret) {
 194                 DRM_DEV_ERROR(minor->dev->dev, "could not install rd debugfs\n");
 195                 return ret;
 196         }
 197
 198         ret = msm_perf_debugfs_init(minor);
 199         if (ret) {
 200                 DRM_DEV_ERROR(minor->dev->dev, "could not install perf debugfs\n");
 201                 return ret;
 202         }
 203
 204         return 0;
 205 }
 206
 207 int msm_debugfs_late_init(struct drm_device *dev)
 208 {
 209         int ret;
 210         ret = late_init_minor(dev->primary);
 211         if (ret)
 212                 return ret;
 213         ret = late_init_minor(dev->render);
 214         return ret;
 215 }
 216
 217 int msm_debugfs_init(struct drm_minor *minor)
 218 {
 219         struct drm_device *dev = minor->dev;
 220         struct msm_drm_private *priv = dev->dev_private;
 221         int ret;
 222
 223         ret = drm_debugfs_create_files(msm_debugfs_list,
 224                         ARRAY_SIZE(msm_debugfs_list),
 225                         minor->debugfs_root, minor);
 226
 227         if (ret) {
 228                 DRM_DEV_ERROR(dev->dev, "could not install msm_debugfs_list\n");
 229                 return ret;
 230         }
 231
 232         debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,
 233                 dev, &msm_gpu_fops);
 234
 235         if (priv->kms && priv->kms->funcs->debugfs_init) {
 236                 ret = priv->kms->funcs->debugfs_init(priv->kms, minor);
 237                 if (ret)
 238                         return ret;
 239         }
 240
 241         return ret;
 242 }
 243 #endif
 244