drivers/gpu/drm/i915/i915_debugfs.c

   1 /*
   2  * Copyright © 2008 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *    Keith Packard <keithp@keithp.com>
  26  *
  27  */
  28
  29 #include <linux/seq_file.h>
  30 #include <linux/debugfs.h>
  31 #include "drmP.h"
  32 #include "drm.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35
  36 #define DRM_I915_RING_DEBUG 1
  37
  38
  39 #if defined(CONFIG_DEBUG_FS)
  40
  41 #define ACTIVE_LIST     1
  42 #define FLUSHING_LIST   2
  43 #define INACTIVE_LIST   3
  44
  45 static const char *get_pin_flag(struct drm_i915_gem_object *obj_priv)
  46 {
  47         if (obj_priv->user_pin_count > 0)
  48                 return "P";
  49         else if (obj_priv->pin_count > 0)
  50                 return "p";
  51         else
  52                 return " ";
  53 }
  54
  55 static const char *get_tiling_flag(struct drm_i915_gem_object *obj_priv)
  56 {
  57     switch (obj_priv->tiling_mode) {
  58     default:
  59     case I915_TILING_NONE: return " ";
  60     case I915_TILING_X: return "X";
  61     case I915_TILING_Y: return "Y";
  62     }
  63 }
  64
  65 static int i915_gem_object_list_info(struct seq_file *m, void *data)
  66 {
  67         struct drm_info_node *node = (struct drm_info_node *) m->private;
  68         uintptr_t list = (uintptr_t) node->info_ent->data;
  69         struct list_head *head;
  70         struct drm_device *dev = node->minor->dev;
  71         drm_i915_private_t *dev_priv = dev->dev_private;
  72         struct drm_i915_gem_object *obj_priv;
  73         spinlock_t *lock = NULL;
  74
  75         switch (list) {
  76         case ACTIVE_LIST:
  77                 seq_printf(m, "Active:\n");
  78                 lock = &dev_priv->mm.active_list_lock;
  79                 head = &dev_priv->mm.active_list;
  80                 break;
  81         case INACTIVE_LIST:
  82                 seq_printf(m, "Inactive:\n");
  83                 head = &dev_priv->mm.inactive_list;
  84                 break;
  85         case FLUSHING_LIST:
  86                 seq_printf(m, "Flushing:\n");
  87                 head = &dev_priv->mm.flushing_list;
  88                 break;
  89         default:
  90                 DRM_INFO("Ooops, unexpected list\n");
  91                 return 0;
  92         }
  93
  94         if (lock)
  95                 spin_lock(lock);
  96         list_for_each_entry(obj_priv, head, list)
  97         {
  98                 struct drm_gem_object *obj = obj_priv->obj;
  99
 100                 seq_printf(m, "    %p: %s %8zd %08x %08x %d%s%s",
 101                            obj,
 102                            get_pin_flag(obj_priv),
 103                            obj->size,
 104                            obj->read_domains, obj->write_domain,
 105                            obj_priv->last_rendering_seqno,
 106                            obj_priv->dirty ? " dirty" : "",
 107                            obj_priv->madv == I915_MADV_DONTNEED ? " purgeable" : "");
 108
 109                 if (obj->name)
 110                         seq_printf(m, " (name: %d)", obj->name);
 111                 if (obj_priv->fence_reg != I915_FENCE_REG_NONE)
 112                         seq_printf(m, " (fence: %d)", obj_priv->fence_reg);
 113                 if (obj_priv->gtt_space != NULL)
 114                         seq_printf(m, " (gtt_offset: %08x)", obj_priv->gtt_offset);
 115
 116                 seq_printf(m, "\n");
 117         }
 118
 119         if (lock)
 120             spin_unlock(lock);
 121         return 0;
 122 }
 123
 124 static int i915_gem_request_info(struct seq_file *m, void *data)
 125 {
 126         struct drm_info_node *node = (struct drm_info_node *) m->private;
 127         struct drm_device *dev = node->minor->dev;
 128         drm_i915_private_t *dev_priv = dev->dev_private;
 129         struct drm_i915_gem_request *gem_request;
 130
 131         seq_printf(m, "Request:\n");
 132         list_for_each_entry(gem_request, &dev_priv->mm.request_list, list) {
 133                 seq_printf(m, "    %d @ %d\n",
 134                            gem_request->seqno,
 135                            (int) (jiffies - gem_request->emitted_jiffies));
 136         }
 137         return 0;
 138 }
 139
 140 static int i915_gem_seqno_info(struct seq_file *m, void *data)
 141 {
 142         struct drm_info_node *node = (struct drm_info_node *) m->private;
 143         struct drm_device *dev = node->minor->dev;
 144         drm_i915_private_t *dev_priv = dev->dev_private;
 145
 146         if (dev_priv->hw_status_page != NULL) {
 147                 seq_printf(m, "Current sequence: %d\n",
 148                            i915_get_gem_seqno(dev));
 149         } else {
 150                 seq_printf(m, "Current sequence: hws uninitialized\n");
 151         }
 152         seq_printf(m, "Waiter sequence:  %d\n",
 153                         dev_priv->mm.waiting_gem_seqno);
 154         seq_printf(m, "IRQ sequence:     %d\n", dev_priv->mm.irq_gem_seqno);
 155         return 0;
 156 }
 157
 158
 159 static int i915_interrupt_info(struct seq_file *m, void *data)
 160 {
 161         struct drm_info_node *node = (struct drm_info_node *) m->private;
 162         struct drm_device *dev = node->minor->dev;
 163         drm_i915_private_t *dev_priv = dev->dev_private;
 164
 165         if (!IS_IRONLAKE(dev)) {
 166                 seq_printf(m, "Interrupt enable:    %08x\n",
 167                            I915_READ(IER));
 168                 seq_printf(m, "Interrupt identity:  %08x\n",
 169                            I915_READ(IIR));
 170                 seq_printf(m, "Interrupt mask:      %08x\n",
 171                            I915_READ(IMR));
 172                 seq_printf(m, "Pipe A stat:         %08x\n",
 173                            I915_READ(PIPEASTAT));
 174                 seq_printf(m, "Pipe B stat:         %08x\n",
 175                            I915_READ(PIPEBSTAT));
 176         } else {
 177                 seq_printf(m, "North Display Interrupt enable:          %08x\n",
 178                            I915_READ(DEIER));
 179                 seq_printf(m, "North Display Interrupt identity:        %08x\n",
 180                            I915_READ(DEIIR));
 181                 seq_printf(m, "North Display Interrupt mask:            %08x\n",
 182                            I915_READ(DEIMR));
 183                 seq_printf(m, "South Display Interrupt enable:          %08x\n",
 184                            I915_READ(SDEIER));
 185                 seq_printf(m, "South Display Interrupt identity:        %08x\n",
 186                            I915_READ(SDEIIR));
 187                 seq_printf(m, "South Display Interrupt mask:            %08x\n",
 188                            I915_READ(SDEIMR));
 189                 seq_printf(m, "Graphics Interrupt enable:               %08x\n",
 190                            I915_READ(GTIER));
 191                 seq_printf(m, "Graphics Interrupt identity:             %08x\n",
 192                            I915_READ(GTIIR));
 193                 seq_printf(m, "Graphics Interrupt mask:         %08x\n",
 194                            I915_READ(GTIMR));
 195         }
 196         seq_printf(m, "Interrupts received: %d\n",
 197                    atomic_read(&dev_priv->irq_received));
 198         if (dev_priv->hw_status_page != NULL) {
 199                 seq_printf(m, "Current sequence:    %d\n",
 200                            i915_get_gem_seqno(dev));
 201         } else {
 202                 seq_printf(m, "Current sequence:    hws uninitialized\n");
 203         }
 204         seq_printf(m, "Waiter sequence:     %d\n",
 205                    dev_priv->mm.waiting_gem_seqno);
 206         seq_printf(m, "IRQ sequence:        %d\n",
 207                    dev_priv->mm.irq_gem_seqno);
 208         return 0;
 209 }
 210
 211 static int i915_gem_fence_regs_info(struct seq_file *m, void *data)
 212 {
 213         struct drm_info_node *node = (struct drm_info_node *) m->private;
 214         struct drm_device *dev = node->minor->dev;
 215         drm_i915_private_t *dev_priv = dev->dev_private;
 216         int i;
 217
 218         seq_printf(m, "Reserved fences = %d\n", dev_priv->fence_reg_start);
 219         seq_printf(m, "Total fences = %d\n", dev_priv->num_fence_regs);
 220         for (i = 0; i < dev_priv->num_fence_regs; i++) {
 221                 struct drm_gem_object *obj = dev_priv->fence_regs[i].obj;
 222
 223                 if (obj == NULL) {
 224                         seq_printf(m, "Fenced object[%2d] = unused\n", i);
 225                 } else {
 226                         struct drm_i915_gem_object *obj_priv;
 227
 228                         obj_priv = obj->driver_private;
 229                         seq_printf(m, "Fenced object[%2d] = %p: %s "
 230                                    "%08x %08zx %08x %s %08x %08x %d",
 231                                    i, obj, get_pin_flag(obj_priv),
 232                                    obj_priv->gtt_offset,
 233                                    obj->size, obj_priv->stride,
 234                                    get_tiling_flag(obj_priv),
 235                                    obj->read_domains, obj->write_domain,
 236                                    obj_priv->last_rendering_seqno);
 237                         if (obj->name)
 238                                 seq_printf(m, " (name: %d)", obj->name);
 239                         seq_printf(m, "\n");
 240                 }
 241         }
 242
 243         return 0;
 244 }
 245
 246 static int i915_hws_info(struct seq_file *m, void *data)
 247 {
 248         struct drm_info_node *node = (struct drm_info_node *) m->private;
 249         struct drm_device *dev = node->minor->dev;
 250         drm_i915_private_t *dev_priv = dev->dev_private;
 251         int i;
 252         volatile u32 *hws;
 253
 254         hws = (volatile u32 *)dev_priv->hw_status_page;
 255         if (hws == NULL)
 256                 return 0;
 257
 258         for (i = 0; i < 4096 / sizeof(u32) / 4; i += 4) {
 259                 seq_printf(m, "0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
 260                            i * 4,
 261                            hws[i], hws[i + 1], hws[i + 2], hws[i + 3]);
 262         }
 263         return 0;
 264 }
 265
 266 static void i915_dump_pages(struct seq_file *m, struct page **pages, int page_count)
 267 {
 268         int page, i;
 269         uint32_t *mem;
 270
 271         for (page = 0; page < page_count; page++) {
 272                 mem = kmap_atomic(pages[page], KM_USER0);
 273                 for (i = 0; i < PAGE_SIZE; i += 4)
 274                         seq_printf(m, "%08x :  %08x\n", i, mem[i / 4]);
 275                 kunmap_atomic(pages[page], KM_USER0);
 276         }
 277 }
 278
 279 static int i915_batchbuffer_info(struct seq_file *m, void *data)
 280 {
 281         struct drm_info_node *node = (struct drm_info_node *) m->private;
 282         struct drm_device *dev = node->minor->dev;
 283         drm_i915_private_t *dev_priv = dev->dev_private;
 284         struct drm_gem_object *obj;
 285         struct drm_i915_gem_object *obj_priv;
 286         int ret;
 287
 288         spin_lock(&dev_priv->mm.active_list_lock);
 289
 290         list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {
 291                 obj = obj_priv->obj;
 292                 if (obj->read_domains & I915_GEM_DOMAIN_COMMAND) {
 293                     ret = i915_gem_object_get_pages(obj);
 294                     if (ret) {
 295                             DRM_ERROR("Failed to get pages: %d\n", ret);
 296                             spin_unlock(&dev_priv->mm.active_list_lock);
 297                             return ret;
 298                     }
 299
 300                     seq_printf(m, "--- gtt_offset = 0x%08x\n", obj_priv->gtt_offset);
 301                     i915_dump_pages(m, obj_priv->pages, obj->size / PAGE_SIZE);
 302
 303                     i915_gem_object_put_pages(obj);
 304                 }
 305         }
 306
 307         spin_unlock(&dev_priv->mm.active_list_lock);
 308
 309         return 0;
 310 }
 311
 312 static int i915_ringbuffer_data(struct seq_file *m, void *data)
 313 {
 314         struct drm_info_node *node = (struct drm_info_node *) m->private;
 315         struct drm_device *dev = node->minor->dev;
 316         drm_i915_private_t *dev_priv = dev->dev_private;
 317         u8 *virt;
 318         uint32_t *ptr, off;
 319
 320         if (!dev_priv->ring.ring_obj) {
 321                 seq_printf(m, "No ringbuffer setup\n");
 322                 return 0;
 323         }
 324
 325         virt = dev_priv->ring.virtual_start;
 326
 327         for (off = 0; off < dev_priv->ring.Size; off += 4) {
 328                 ptr = (uint32_t *)(virt + off);
 329                 seq_printf(m, "%08x :  %08x\n", off, *ptr);
 330         }
 331
 332         return 0;
 333 }
 334
 335 static int i915_ringbuffer_info(struct seq_file *m, void *data)
 336 {
 337         struct drm_info_node *node = (struct drm_info_node *) m->private;
 338         struct drm_device *dev = node->minor->dev;
 339         drm_i915_private_t *dev_priv = dev->dev_private;
 340         unsigned int head, tail;
 341
 342         head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 343         tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 344
 345         seq_printf(m, "RingHead :  %08x\n", head);
 346         seq_printf(m, "RingTail :  %08x\n", tail);
 347         seq_printf(m, "RingSize :  %08lx\n", dev_priv->ring.Size);
 348         seq_printf(m, "Acthd :     %08x\n", I915_READ(IS_I965G(dev) ? ACTHD_I965 : ACTHD));
 349
 350         return 0;
 351 }
 352
 353 static int i915_error_state(struct seq_file *m, void *unused)
 354 {
 355         struct drm_info_node *node = (struct drm_info_node *) m->private;
 356         struct drm_device *dev = node->minor->dev;
 357         drm_i915_private_t *dev_priv = dev->dev_private;
 358         struct drm_i915_error_state *error;
 359         unsigned long flags;
 360
 361         spin_lock_irqsave(&dev_priv->error_lock, flags);
 362         if (!dev_priv->first_error) {
 363                 seq_printf(m, "no error state collected\n");
 364                 goto out;
 365         }
 366
 367         error = dev_priv->first_error;
 368
 369         seq_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
 370                    error->time.tv_usec);
 371         seq_printf(m, "EIR: 0x%08x\n", error->eir);
 372         seq_printf(m, "  PGTBL_ER: 0x%08x\n", error->pgtbl_er);
 373         seq_printf(m, "  INSTPM: 0x%08x\n", error->instpm);
 374         seq_printf(m, "  IPEIR: 0x%08x\n", error->ipeir);
 375         seq_printf(m, "  IPEHR: 0x%08x\n", error->ipehr);
 376         seq_printf(m, "  INSTDONE: 0x%08x\n", error->instdone);
 377         seq_printf(m, "  ACTHD: 0x%08x\n", error->acthd);
 378         if (IS_I965G(dev)) {
 379                 seq_printf(m, "  INSTPS: 0x%08x\n", error->instps);
 380                 seq_printf(m, "  INSTDONE1: 0x%08x\n", error->instdone1);
 381         }
 382
 383 out:
 384         spin_unlock_irqrestore(&dev_priv->error_lock, flags);
 385
 386         return 0;
 387 }
 388
 389 static int i915_registers_info(struct seq_file *m, void *data) {
 390         struct drm_info_node *node = (struct drm_info_node *) m->private;
 391         struct drm_device *dev = node->minor->dev;
 392         drm_i915_private_t *dev_priv = dev->dev_private;
 393         uint32_t reg;
 394
 395 #define DUMP_RANGE(start, end) \
 396         for (reg=start; reg < end; reg += 4) \
 397         seq_printf(m, "%08x\t%08x\n", reg, I915_READ(reg));
 398
 399         DUMP_RANGE(0x00000, 0x00fff);   /* VGA registers */
 400         DUMP_RANGE(0x02000, 0x02fff);   /* instruction, memory, interrupt control registers */
 401         DUMP_RANGE(0x03000, 0x031ff);   /* FENCE and PPGTT control registers */
 402         DUMP_RANGE(0x03200, 0x03fff);   /* frame buffer compression registers */
 403         DUMP_RANGE(0x05000, 0x05fff);   /* I/O control registers */
 404         DUMP_RANGE(0x06000, 0x06fff);   /* clock control registers */
 405         DUMP_RANGE(0x07000, 0x07fff);   /* 3D internal debug registers */
 406         DUMP_RANGE(0x07400, 0x088ff);   /* GPE debug registers */
 407         DUMP_RANGE(0x0a000, 0x0afff);   /* display palette registers */
 408         DUMP_RANGE(0x10000, 0x13fff);   /* MMIO MCHBAR */
 409         DUMP_RANGE(0x30000, 0x3ffff);   /* overlay registers */
 410         DUMP_RANGE(0x60000, 0x6ffff);   /* display engine pipeline registers */
 411         DUMP_RANGE(0x70000, 0x72fff);   /* display and cursor registers */
 412         DUMP_RANGE(0x73000, 0x73fff);   /* performance counters */
 413
 414         return 0;
 415 }
 416
 417 static int
 418 i915_wedged_open(struct inode *inode,
 419                  struct file *filp)
 420 {
 421         filp->private_data = inode->i_private;
 422         return 0;
 423 }
 424
 425 static ssize_t
 426 i915_wedged_read(struct file *filp,
 427                  char __user *ubuf,
 428                  size_t max,
 429                  loff_t *ppos)
 430 {
 431         struct drm_device *dev = filp->private_data;
 432         drm_i915_private_t *dev_priv = dev->dev_private;
 433         char buf[80];
 434         int len;
 435
 436         len = snprintf(buf, sizeof (buf),
 437                        "wedged :  %d\n",
 438                        atomic_read(&dev_priv->mm.wedged));
 439
 440         return simple_read_from_buffer(ubuf, max, ppos, buf, len);
 441 }
 442
 443 static ssize_t
 444 i915_wedged_write(struct file *filp,
 445                   const char __user *ubuf,
 446                   size_t cnt,
 447                   loff_t *ppos)
 448 {
 449         struct drm_device *dev = filp->private_data;
 450         drm_i915_private_t *dev_priv = dev->dev_private;
 451         char buf[20];
 452         int val = 1;
 453
 454         if (cnt > 0) {
 455                 if (cnt > sizeof (buf) - 1)
 456                         return -EINVAL;
 457
 458                 if (copy_from_user(buf, ubuf, cnt))
 459                         return -EFAULT;
 460                 buf[cnt] = 0;
 461
 462                 val = simple_strtoul(buf, NULL, 0);
 463         }
 464
 465         DRM_INFO("Manually setting wedged to %d\n", val);
 466
 467         atomic_set(&dev_priv->mm.wedged, val);
 468         if (val) {
 469                 DRM_WAKEUP(&dev_priv->irq_queue);
 470                 queue_work(dev_priv->wq, &dev_priv->error_work);
 471         }
 472
 473         return cnt;
 474 }
 475
 476 static const struct file_operations i915_wedged_fops = {
 477         .owner = THIS_MODULE,
 478         .open = i915_wedged_open,
 479         .read = i915_wedged_read,
 480         .write = i915_wedged_write,
 481 };
 482
 483 /* As the drm_debugfs_init() routines are called before dev->dev_private is
 484  * allocated we need to hook into the minor for release. */
 485 static int
 486 drm_add_fake_info_node(struct drm_minor *minor,
 487                        struct dentry *ent,
 488                        const void *key)
 489 {
 490         struct drm_info_node *node;
 491
 492         node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
 493         if (node == NULL) {
 494                 debugfs_remove(ent);
 495                 return -ENOMEM;
 496         }
 497
 498         node->minor = minor;
 499         node->dent = ent;
 500         node->info_ent = (void *) key;
 501         list_add(&node->list, &minor->debugfs_nodes.list);
 502
 503         return 0;
 504 }
 505
 506 static int i915_wedged_create(struct dentry *root, struct drm_minor *minor)
 507 {
 508         struct drm_device *dev = minor->dev;
 509         struct dentry *ent;
 510
 511         ent = debugfs_create_file("i915_wedged",
 512                                   S_IRUGO | S_IWUSR,
 513                                   root, dev,
 514                                   &i915_wedged_fops);
 515         if (IS_ERR(ent))
 516                 return PTR_ERR(ent);
 517
 518         return drm_add_fake_info_node(minor, ent, &i915_wedged_fops);
 519 }
 520
 521 static struct drm_info_list i915_debugfs_list[] = {
 522         {"i915_regs", i915_registers_info, 0},
 523         {"i915_gem_active", i915_gem_object_list_info, 0, (void *) ACTIVE_LIST},
 524         {"i915_gem_flushing", i915_gem_object_list_info, 0, (void *) FLUSHING_LIST},
 525         {"i915_gem_inactive", i915_gem_object_list_info, 0, (void *) INACTIVE_LIST},
 526         {"i915_gem_request", i915_gem_request_info, 0},
 527         {"i915_gem_seqno", i915_gem_seqno_info, 0},
 528         {"i915_gem_fence_regs", i915_gem_fence_regs_info, 0},
 529         {"i915_gem_interrupt", i915_interrupt_info, 0},
 530         {"i915_gem_hws", i915_hws_info, 0},
 531         {"i915_ringbuffer_data", i915_ringbuffer_data, 0},
 532         {"i915_ringbuffer_info", i915_ringbuffer_info, 0},
 533         {"i915_batchbuffers", i915_batchbuffer_info, 0},
 534         {"i915_error_state", i915_error_state, 0},
 535 };
 536 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)
 537
 538 int i915_debugfs_init(struct drm_minor *minor)
 539 {
 540         int ret;
 541
 542         ret = i915_wedged_create(minor->debugfs_root, minor);
 543         if (ret)
 544                 return ret;
 545
 546         return drm_debugfs_create_files(i915_debugfs_list,
 547                                         I915_DEBUGFS_ENTRIES,
 548                                         minor->debugfs_root, minor);
 549 }
 550
 551 void i915_debugfs_cleanup(struct drm_minor *minor)
 552 {
 553         drm_debugfs_remove_files(i915_debugfs_list,
 554                                  I915_DEBUGFS_ENTRIES, minor);
 555         drm_debugfs_remove_files((struct drm_info_list *) &i915_wedged_fops,
 556                                  1, minor);
 557 }
 558
 559 #endif /* CONFIG_DEBUG_FS */