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 msm_gpu_hw_init(gpu); 81 show_priv->state = gpu->funcs->gpu_state_get(gpu); 82 pm_runtime_put_sync(&gpu->pdev->dev); 83 84 mutex_unlock(&dev->struct_mutex); 85 86 if (IS_ERR(show_priv->state)) { 87 ret = PTR_ERR(show_priv->state); 88 goto free_priv; 89 } 90 91 show_priv->dev = dev; 92 93 ret = single_open(file, msm_gpu_show, show_priv); 94 if (ret) 95 goto free_priv; 96 97 return 0; 98 99 free_priv: 100 kfree(show_priv); 101 return ret; 102 } 103 104 static const struct file_operations msm_gpu_fops = { 105 .owner = THIS_MODULE, 106 .open = msm_gpu_open, 107 .read = seq_read, 108 .llseek = seq_lseek, 109 .release = msm_gpu_release, 110 }; 111 112 static unsigned long last_shrink_freed; 113 114 static int 115 shrink_get(void *data, u64 *val) 116 { 117 *val = last_shrink_freed; 118 119 return 0; 120 } 121 122 static int 123 shrink_set(void *data, u64 val) 124 { 125 struct drm_device *dev = data; 126 127 last_shrink_freed = msm_gem_shrinker_shrink(dev, val); 128 129 return 0; 130 } 131 132 DEFINE_SIMPLE_ATTRIBUTE(shrink_fops, 133 shrink_get, shrink_set, 134 "0x%08llx\n"); 135 136 137 static int msm_gem_show(struct drm_device *dev, struct seq_file *m) 138 { 139 struct msm_drm_private *priv = dev->dev_private; 140 int ret; 141 142 ret = mutex_lock_interruptible(&priv->obj_lock); 143 if (ret) 144 return ret; 145 146 msm_gem_describe_objects(&priv->objects, m); 147 148 mutex_unlock(&priv->obj_lock); 149 150 return 0; 151 } 152 153 static int msm_mm_show(struct drm_device *dev, struct seq_file *m) 154 { 155 struct drm_printer p = drm_seq_file_printer(m); 156 157 drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p); 158 159 return 0; 160 } 161 162 static int msm_fb_show(struct drm_device *dev, struct seq_file *m) 163 { 164 struct msm_drm_private *priv = dev->dev_private; 165 struct drm_framebuffer *fb, *fbdev_fb = NULL; 166 167 if (priv->fbdev) { 168 seq_printf(m, "fbcon "); 169 fbdev_fb = priv->fbdev->fb; 170 msm_framebuffer_describe(fbdev_fb, m); 171 } 172 173 mutex_lock(&dev->mode_config.fb_lock); 174 list_for_each_entry(fb, &dev->mode_config.fb_list, head) { 175 if (fb == fbdev_fb) 176 continue; 177 178 seq_printf(m, "user "); 179 msm_framebuffer_describe(fb, m); 180 } 181 mutex_unlock(&dev->mode_config.fb_lock); 182 183 return 0; 184 } 185 186 static int show_locked(struct seq_file *m, void *arg) 187 { 188 struct drm_info_node *node = (struct drm_info_node *) m->private; 189 struct drm_device *dev = node->minor->dev; 190 int (*show)(struct drm_device *dev, struct seq_file *m) = 191 node->info_ent->data; 192 int ret; 193 194 ret = mutex_lock_interruptible(&dev->struct_mutex); 195 if (ret) 196 return ret; 197 198 ret = show(dev, m); 199 200 mutex_unlock(&dev->struct_mutex); 201 202 return ret; 203 } 204 205 static struct drm_info_list msm_debugfs_list[] = { 206 {"gem", show_locked, 0, msm_gem_show}, 207 { "mm", show_locked, 0, msm_mm_show }, 208 { "fb", show_locked, 0, msm_fb_show }, 209 }; 210 211 static int late_init_minor(struct drm_minor *minor) 212 { 213 int ret; 214 215 if (!minor) 216 return 0; 217 218 ret = msm_rd_debugfs_init(minor); 219 if (ret) { 220 DRM_DEV_ERROR(minor->dev->dev, "could not install rd debugfs\n"); 221 return ret; 222 } 223 224 ret = msm_perf_debugfs_init(minor); 225 if (ret) { 226 DRM_DEV_ERROR(minor->dev->dev, "could not install perf debugfs\n"); 227 return ret; 228 } 229 230 return 0; 231 } 232 233 int msm_debugfs_late_init(struct drm_device *dev) 234 { 235 int ret; 236 ret = late_init_minor(dev->primary); 237 if (ret) 238 return ret; 239 ret = late_init_minor(dev->render); 240 return ret; 241 } 242 243 void msm_debugfs_init(struct drm_minor *minor) 244 { 245 struct drm_device *dev = minor->dev; 246 struct msm_drm_private *priv = dev->dev_private; 247 248 drm_debugfs_create_files(msm_debugfs_list, 249 ARRAY_SIZE(msm_debugfs_list), 250 minor->debugfs_root, minor); 251 252 debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root, 253 dev, &msm_gpu_fops); 254 255 debugfs_create_u32("hangcheck_period_ms", 0600, minor->debugfs_root, 256 &priv->hangcheck_period); 257 258 debugfs_create_file("shrink", S_IRWXU, minor->debugfs_root, 259 dev, &shrink_fops); 260 261 if (priv->kms && priv->kms->funcs->debugfs_init) 262 priv->kms->funcs->debugfs_init(priv->kms, minor); 263 } 264 #endif 265 266