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