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 <linux/slab.h>
  32 #include "drmP.h"
  33 #include "drm.h"
  34 #include "i915_drm.h"
  35 #include "i915_drv.h"
  36
  37 #define DRM_I915_RING_DEBUG 1
  38
  39
  40 #if defined(CONFIG_DEBUG_FS)
  41
  42 #define ACTIVE_LIST     1
  43 #define FLUSHING_LIST   2
  44 #define INACTIVE_LIST   3
  45
  46 static const char *get_pin_flag(struct drm_i915_gem_object *obj_priv)
  47 {
  48         if (obj_priv->user_pin_count > 0)
  49                 return "P";
  50         else if (obj_priv->pin_count > 0)
  51                 return "p";
  52         else
  53                 return " ";
  54 }
  55
  56 static const char *get_tiling_flag(struct drm_i915_gem_object *obj_priv)
  57 {
  58     switch (obj_priv->tiling_mode) {
  59     default:
  60     case I915_TILING_NONE: return " ";
  61     case I915_TILING_X: return "X";
  62     case I915_TILING_Y: return "Y";
  63     }
  64 }
  65
  66 static int i915_gem_object_list_info(struct seq_file *m, void *data)
  67 {
  68         struct drm_info_node *node = (struct drm_info_node *) m->private;
  69         uintptr_t list = (uintptr_t) node->info_ent->data;
  70         struct list_head *head;
  71         struct drm_device *dev = node->minor->dev;
  72         drm_i915_private_t *dev_priv = dev->dev_private;
  73         struct drm_i915_gem_object *obj_priv;
  74         spinlock_t *lock = NULL;
  75
  76         switch (list) {
  77         case ACTIVE_LIST:
  78                 seq_printf(m, "Active:\n");
  79                 lock = &dev_priv->mm.active_list_lock;
  80                 head = &dev_priv->mm.active_list;
  81                 break;
  82         case INACTIVE_LIST:
  83                 seq_printf(m, "Inactive:\n");
  84                 head = &dev_priv->mm.inactive_list;
  85                 break;
  86         case FLUSHING_LIST:
  87                 seq_printf(m, "Flushing:\n");
  88                 head = &dev_priv->mm.flushing_list;
  89                 break;
  90         default:
  91                 DRM_INFO("Ooops, unexpected list\n");
  92                 return 0;
  93         }
  94
  95         if (lock)
  96                 spin_lock(lock);
  97         list_for_each_entry(obj_priv, head, list)
  98         {
  99                 seq_printf(m, "    %p: %s %8zd %08x %08x %d%s%s",
 100                            &obj_priv->base,
 101                            get_pin_flag(obj_priv),
 102                            obj_priv->base.size,
 103                            obj_priv->base.read_domains,
 104                            obj_priv->base.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_priv->base.name)
 110                         seq_printf(m, " (name: %d)", obj_priv->base.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 (!HAS_PCH_SPLIT(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 = to_intel_bo(obj);
 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(mem, 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->base;
 292                 if (obj->read_domains & I915_GEM_DOMAIN_COMMAND) {
 293                     ret = i915_gem_object_get_pages(obj, 0);
 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 const char *pin_flag(int pinned)
 354 {
 355         if (pinned > 0)
 356                 return " P";
 357         else if (pinned < 0)
 358                 return " p";
 359         else
 360                 return "";
 361 }
 362
 363 static const char *tiling_flag(int tiling)
 364 {
 365         switch (tiling) {
 366         default:
 367         case I915_TILING_NONE: return "";
 368         case I915_TILING_X: return " X";
 369         case I915_TILING_Y: return " Y";
 370         }
 371 }
 372
 373 static const char *dirty_flag(int dirty)
 374 {
 375         return dirty ? " dirty" : "";
 376 }
 377
 378 static const char *purgeable_flag(int purgeable)
 379 {
 380         return purgeable ? " purgeable" : "";
 381 }
 382
 383 static int i915_error_state(struct seq_file *m, void *unused)
 384 {
 385         struct drm_info_node *node = (struct drm_info_node *) m->private;
 386         struct drm_device *dev = node->minor->dev;
 387         drm_i915_private_t *dev_priv = dev->dev_private;
 388         struct drm_i915_error_state *error;
 389         unsigned long flags;
 390         int i, page, offset, elt;
 391
 392         spin_lock_irqsave(&dev_priv->error_lock, flags);
 393         if (!dev_priv->first_error) {
 394                 seq_printf(m, "no error state collected\n");
 395                 goto out;
 396         }
 397
 398         error = dev_priv->first_error;
 399
 400         seq_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
 401                    error->time.tv_usec);
 402         seq_printf(m, "PCI ID: 0x%04x\n", dev->pci_device);
 403         seq_printf(m, "EIR: 0x%08x\n", error->eir);
 404         seq_printf(m, "  PGTBL_ER: 0x%08x\n", error->pgtbl_er);
 405         seq_printf(m, "  INSTPM: 0x%08x\n", error->instpm);
 406         seq_printf(m, "  IPEIR: 0x%08x\n", error->ipeir);
 407         seq_printf(m, "  IPEHR: 0x%08x\n", error->ipehr);
 408         seq_printf(m, "  INSTDONE: 0x%08x\n", error->instdone);
 409         seq_printf(m, "  ACTHD: 0x%08x\n", error->acthd);
 410         if (IS_I965G(dev)) {
 411                 seq_printf(m, "  INSTPS: 0x%08x\n", error->instps);
 412                 seq_printf(m, "  INSTDONE1: 0x%08x\n", error->instdone1);
 413         }
 414         seq_printf(m, "seqno: 0x%08x\n", error->seqno);
 415
 416         if (error->active_bo_count) {
 417                 seq_printf(m, "Buffers [%d]:\n", error->active_bo_count);
 418
 419                 for (i = 0; i < error->active_bo_count; i++) {
 420                         seq_printf(m, "  %08x %8zd %08x %08x %08x%s%s%s%s",
 421                                    error->active_bo[i].gtt_offset,
 422                                    error->active_bo[i].size,
 423                                    error->active_bo[i].read_domains,
 424                                    error->active_bo[i].write_domain,
 425                                    error->active_bo[i].seqno,
 426                                    pin_flag(error->active_bo[i].pinned),
 427                                    tiling_flag(error->active_bo[i].tiling),
 428                                    dirty_flag(error->active_bo[i].dirty),
 429                                    purgeable_flag(error->active_bo[i].purgeable));
 430
 431                         if (error->active_bo[i].name)
 432                                 seq_printf(m, " (name: %d)", error->active_bo[i].name);
 433                         if (error->active_bo[i].fence_reg != I915_FENCE_REG_NONE)
 434                                 seq_printf(m, " (fence: %d)", error->active_bo[i].fence_reg);
 435
 436                         seq_printf(m, "\n");
 437                 }
 438         }
 439
 440         for (i = 0; i < ARRAY_SIZE(error->batchbuffer); i++) {
 441                 if (error->batchbuffer[i]) {
 442                         struct drm_i915_error_object *obj = error->batchbuffer[i];
 443
 444                         seq_printf(m, "--- gtt_offset = 0x%08x\n", obj->gtt_offset);
 445                         offset = 0;
 446                         for (page = 0; page < obj->page_count; page++) {
 447                                 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
 448                                         seq_printf(m, "%08x :  %08x\n", offset, obj->pages[page][elt]);
 449                                         offset += 4;
 450                                 }
 451                         }
 452                 }
 453         }
 454
 455         if (error->ringbuffer) {
 456                 struct drm_i915_error_object *obj = error->ringbuffer;
 457
 458                 seq_printf(m, "--- ringbuffer = 0x%08x\n", obj->gtt_offset);
 459                 offset = 0;
 460                 for (page = 0; page < obj->page_count; page++) {
 461                         for (elt = 0; elt < PAGE_SIZE/4; elt++) {
 462                                 seq_printf(m, "%08x :  %08x\n", offset, obj->pages[page][elt]);
 463                                 offset += 4;
 464                         }
 465                 }
 466         }
 467
 468 out:
 469         spin_unlock_irqrestore(&dev_priv->error_lock, flags);
 470
 471         return 0;
 472 }
 473
 474 static int i915_rstdby_delays(struct seq_file *m, void *unused)
 475 {
 476         struct drm_info_node *node = (struct drm_info_node *) m->private;
 477         struct drm_device *dev = node->minor->dev;
 478         drm_i915_private_t *dev_priv = dev->dev_private;
 479         u16 crstanddelay = I915_READ16(CRSTANDVID);
 480
 481         seq_printf(m, "w/ctx: %d, w/o ctx: %d\n", (crstanddelay >> 8) & 0x3f, (crstanddelay & 0x3f));
 482
 483         return 0;
 484 }
 485
 486 static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 487 {
 488         struct drm_info_node *node = (struct drm_info_node *) m->private;
 489         struct drm_device *dev = node->minor->dev;
 490         drm_i915_private_t *dev_priv = dev->dev_private;
 491         u16 rgvswctl = I915_READ16(MEMSWCTL);
 492
 493         seq_printf(m, "Last command: 0x%01x\n", (rgvswctl >> 13) & 0x3);
 494         seq_printf(m, "Command status: %d\n", (rgvswctl >> 12) & 1);
 495         seq_printf(m, "P%d DELAY 0x%02x\n", (rgvswctl >> 8) & 0xf,
 496                    rgvswctl & 0x3f);
 497
 498         return 0;
 499 }
 500
 501 static int i915_delayfreq_table(struct seq_file *m, void *unused)
 502 {
 503         struct drm_info_node *node = (struct drm_info_node *) m->private;
 504         struct drm_device *dev = node->minor->dev;
 505         drm_i915_private_t *dev_priv = dev->dev_private;
 506         u32 delayfreq;
 507         int i;
 508
 509         for (i = 0; i < 16; i++) {
 510                 delayfreq = I915_READ(PXVFREQ_BASE + i * 4);
 511                 seq_printf(m, "P%02dVIDFREQ: 0x%08x\n", i, delayfreq);
 512         }
 513
 514         return 0;
 515 }
 516
 517 static inline int MAP_TO_MV(int map)
 518 {
 519         return 1250 - (map * 25);
 520 }
 521
 522 static int i915_inttoext_table(struct seq_file *m, void *unused)
 523 {
 524         struct drm_info_node *node = (struct drm_info_node *) m->private;
 525         struct drm_device *dev = node->minor->dev;
 526         drm_i915_private_t *dev_priv = dev->dev_private;
 527         u32 inttoext;
 528         int i;
 529
 530         for (i = 1; i <= 32; i++) {
 531                 inttoext = I915_READ(INTTOEXT_BASE_ILK + i * 4);
 532                 seq_printf(m, "INTTOEXT%02d: 0x%08x\n", i, inttoext);
 533         }
 534
 535         return 0;
 536 }
 537
 538 static int i915_drpc_info(struct seq_file *m, void *unused)
 539 {
 540         struct drm_info_node *node = (struct drm_info_node *) m->private;
 541         struct drm_device *dev = node->minor->dev;
 542         drm_i915_private_t *dev_priv = dev->dev_private;
 543         u32 rgvmodectl = I915_READ(MEMMODECTL);
 544
 545         seq_printf(m, "HD boost: %s\n", (rgvmodectl & MEMMODE_BOOST_EN) ?
 546                    "yes" : "no");
 547         seq_printf(m, "Boost freq: %d\n",
 548                    (rgvmodectl & MEMMODE_BOOST_FREQ_MASK) >>
 549                    MEMMODE_BOOST_FREQ_SHIFT);
 550         seq_printf(m, "HW control enabled: %s\n",
 551                    rgvmodectl & MEMMODE_HWIDLE_EN ? "yes" : "no");
 552         seq_printf(m, "SW control enabled: %s\n",
 553                    rgvmodectl & MEMMODE_SWMODE_EN ? "yes" : "no");
 554         seq_printf(m, "Gated voltage change: %s\n",
 555                    rgvmodectl & MEMMODE_RCLK_GATE ? "yes" : "no");
 556         seq_printf(m, "Starting frequency: P%d\n",
 557                    (rgvmodectl & MEMMODE_FSTART_MASK) >> MEMMODE_FSTART_SHIFT);
 558         seq_printf(m, "Max frequency: P%d\n",
 559                    (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT);
 560         seq_printf(m, "Min frequency: P%d\n", (rgvmodectl & MEMMODE_FMIN_MASK));
 561
 562         return 0;
 563 }
 564
 565 static int i915_fbc_status(struct seq_file *m, void *unused)
 566 {
 567         struct drm_info_node *node = (struct drm_info_node *) m->private;
 568         struct drm_device *dev = node->minor->dev;
 569         drm_i915_private_t *dev_priv = dev->dev_private;
 570
 571         if (!I915_HAS_FBC(dev)) {
 572                 seq_printf(m, "FBC unsupported on this chipset\n");
 573                 return 0;
 574         }
 575
 576         if (intel_fbc_enabled(dev)) {
 577                 seq_printf(m, "FBC enabled\n");
 578         } else {
 579                 seq_printf(m, "FBC disabled: ");
 580                 switch (dev_priv->no_fbc_reason) {
 581                 case FBC_STOLEN_TOO_SMALL:
 582                         seq_printf(m, "not enough stolen memory");
 583                         break;
 584                 case FBC_UNSUPPORTED_MODE:
 585                         seq_printf(m, "mode not supported");
 586                         break;
 587                 case FBC_MODE_TOO_LARGE:
 588                         seq_printf(m, "mode too large");
 589                         break;
 590                 case FBC_BAD_PLANE:
 591                         seq_printf(m, "FBC unsupported on plane");
 592                         break;
 593                 case FBC_NOT_TILED:
 594                         seq_printf(m, "scanout buffer not tiled");
 595                         break;
 596                 default:
 597                         seq_printf(m, "unknown reason");
 598                 }
 599                 seq_printf(m, "\n");
 600         }
 601         return 0;
 602 }
 603
 604 static int i915_sr_status(struct seq_file *m, void *unused)
 605 {
 606         struct drm_info_node *node = (struct drm_info_node *) m->private;
 607         struct drm_device *dev = node->minor->dev;
 608         drm_i915_private_t *dev_priv = dev->dev_private;
 609         bool sr_enabled = false;
 610
 611         if (IS_I965G(dev) || IS_I945G(dev) || IS_I945GM(dev))
 612                 sr_enabled = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;
 613         else if (IS_I915GM(dev))
 614                 sr_enabled = I915_READ(INSTPM) & INSTPM_SELF_EN;
 615         else if (IS_PINEVIEW(dev))
 616                 sr_enabled = I915_READ(DSPFW3) & PINEVIEW_SELF_REFRESH_EN;
 617
 618         seq_printf(m, "self-refresh: %s\n", sr_enabled ? "enabled" :
 619                    "disabled");
 620
 621         return 0;
 622 }
 623
 624 static int
 625 i915_wedged_open(struct inode *inode,
 626                  struct file *filp)
 627 {
 628         filp->private_data = inode->i_private;
 629         return 0;
 630 }
 631
 632 static ssize_t
 633 i915_wedged_read(struct file *filp,
 634                  char __user *ubuf,
 635                  size_t max,
 636                  loff_t *ppos)
 637 {
 638         struct drm_device *dev = filp->private_data;
 639         drm_i915_private_t *dev_priv = dev->dev_private;
 640         char buf[80];
 641         int len;
 642
 643         len = snprintf(buf, sizeof (buf),
 644                        "wedged :  %d\n",
 645                        atomic_read(&dev_priv->mm.wedged));
 646
 647         return simple_read_from_buffer(ubuf, max, ppos, buf, len);
 648 }
 649
 650 static ssize_t
 651 i915_wedged_write(struct file *filp,
 652                   const char __user *ubuf,
 653                   size_t cnt,
 654                   loff_t *ppos)
 655 {
 656         struct drm_device *dev = filp->private_data;
 657         drm_i915_private_t *dev_priv = dev->dev_private;
 658         char buf[20];
 659         int val = 1;
 660
 661         if (cnt > 0) {
 662                 if (cnt > sizeof (buf) - 1)
 663                         return -EINVAL;
 664
 665                 if (copy_from_user(buf, ubuf, cnt))
 666                         return -EFAULT;
 667                 buf[cnt] = 0;
 668
 669                 val = simple_strtoul(buf, NULL, 0);
 670         }
 671
 672         DRM_INFO("Manually setting wedged to %d\n", val);
 673
 674         atomic_set(&dev_priv->mm.wedged, val);
 675         if (val) {
 676                 DRM_WAKEUP(&dev_priv->irq_queue);
 677                 queue_work(dev_priv->wq, &dev_priv->error_work);
 678         }
 679
 680         return cnt;
 681 }
 682
 683 static const struct file_operations i915_wedged_fops = {
 684         .owner = THIS_MODULE,
 685         .open = i915_wedged_open,
 686         .read = i915_wedged_read,
 687         .write = i915_wedged_write,
 688 };
 689
 690 /* As the drm_debugfs_init() routines are called before dev->dev_private is
 691  * allocated we need to hook into the minor for release. */
 692 static int
 693 drm_add_fake_info_node(struct drm_minor *minor,
 694                        struct dentry *ent,
 695                        const void *key)
 696 {
 697         struct drm_info_node *node;
 698
 699         node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
 700         if (node == NULL) {
 701                 debugfs_remove(ent);
 702                 return -ENOMEM;
 703         }
 704
 705         node->minor = minor;
 706         node->dent = ent;
 707         node->info_ent = (void *) key;
 708         list_add(&node->list, &minor->debugfs_nodes.list);
 709
 710         return 0;
 711 }
 712
 713 static int i915_wedged_create(struct dentry *root, struct drm_minor *minor)
 714 {
 715         struct drm_device *dev = minor->dev;
 716         struct dentry *ent;
 717
 718         ent = debugfs_create_file("i915_wedged",
 719                                   S_IRUGO | S_IWUSR,
 720                                   root, dev,
 721                                   &i915_wedged_fops);
 722         if (IS_ERR(ent))
 723                 return PTR_ERR(ent);
 724
 725         return drm_add_fake_info_node(minor, ent, &i915_wedged_fops);
 726 }
 727
 728 static struct drm_info_list i915_debugfs_list[] = {
 729         {"i915_gem_active", i915_gem_object_list_info, 0, (void *) ACTIVE_LIST},
 730         {"i915_gem_flushing", i915_gem_object_list_info, 0, (void *) FLUSHING_LIST},
 731         {"i915_gem_inactive", i915_gem_object_list_info, 0, (void *) INACTIVE_LIST},
 732         {"i915_gem_request", i915_gem_request_info, 0},
 733         {"i915_gem_seqno", i915_gem_seqno_info, 0},
 734         {"i915_gem_fence_regs", i915_gem_fence_regs_info, 0},
 735         {"i915_gem_interrupt", i915_interrupt_info, 0},
 736         {"i915_gem_hws", i915_hws_info, 0},
 737         {"i915_ringbuffer_data", i915_ringbuffer_data, 0},
 738         {"i915_ringbuffer_info", i915_ringbuffer_info, 0},
 739         {"i915_batchbuffers", i915_batchbuffer_info, 0},
 740         {"i915_error_state", i915_error_state, 0},
 741         {"i915_rstdby_delays", i915_rstdby_delays, 0},
 742         {"i915_cur_delayinfo", i915_cur_delayinfo, 0},
 743         {"i915_delayfreq_table", i915_delayfreq_table, 0},
 744         {"i915_inttoext_table", i915_inttoext_table, 0},
 745         {"i915_drpc_info", i915_drpc_info, 0},
 746         {"i915_fbc_status", i915_fbc_status, 0},
 747         {"i915_sr_status", i915_sr_status, 0},
 748 };
 749 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)
 750
 751 int i915_debugfs_init(struct drm_minor *minor)
 752 {
 753         int ret;
 754
 755         ret = i915_wedged_create(minor->debugfs_root, minor);
 756         if (ret)
 757                 return ret;
 758
 759         return drm_debugfs_create_files(i915_debugfs_list,
 760                                         I915_DEBUGFS_ENTRIES,
 761                                         minor->debugfs_root, minor);
 762 }
 763
 764 void i915_debugfs_cleanup(struct drm_minor *minor)
 765 {
 766         drm_debugfs_remove_files(i915_debugfs_list,
 767                                  I915_DEBUGFS_ENTRIES, minor);
 768         drm_debugfs_remove_files((struct drm_info_list *) &i915_wedged_fops,
 769                                  1, minor);
 770 }
 771
 772 #endif /* CONFIG_DEBUG_FS */