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                 struct drm_gem_object *obj = obj_priv->obj;
 100
 101                 seq_printf(m, "    %p: %s %8zd %08x %08x %d%s%s",
 102                            obj,
 103                            get_pin_flag(obj_priv),
 104                            obj->size,
 105                            obj->read_domains, obj->write_domain,
 106                            obj_priv->last_rendering_seqno,
 107                            obj_priv->dirty ? " dirty" : "",
 108                            obj_priv->madv == I915_MADV_DONTNEED ? " purgeable" : "");
 109
 110                 if (obj->name)
 111                         seq_printf(m, " (name: %d)", obj->name);
 112                 if (obj_priv->fence_reg != I915_FENCE_REG_NONE)
 113                         seq_printf(m, " (fence: %d)", obj_priv->fence_reg);
 114                 if (obj_priv->gtt_space != NULL)
 115                         seq_printf(m, " (gtt_offset: %08x)", obj_priv->gtt_offset);
 116
 117                 seq_printf(m, "\n");
 118         }
 119
 120         if (lock)
 121             spin_unlock(lock);
 122         return 0;
 123 }
 124
 125 static int i915_gem_request_info(struct seq_file *m, void *data)
 126 {
 127         struct drm_info_node *node = (struct drm_info_node *) m->private;
 128         struct drm_device *dev = node->minor->dev;
 129         drm_i915_private_t *dev_priv = dev->dev_private;
 130         struct drm_i915_gem_request *gem_request;
 131
 132         seq_printf(m, "Request:\n");
 133         list_for_each_entry(gem_request, &dev_priv->mm.request_list, list) {
 134                 seq_printf(m, "    %d @ %d\n",
 135                            gem_request->seqno,
 136                            (int) (jiffies - gem_request->emitted_jiffies));
 137         }
 138         return 0;
 139 }
 140
 141 static int i915_gem_seqno_info(struct seq_file *m, void *data)
 142 {
 143         struct drm_info_node *node = (struct drm_info_node *) m->private;
 144         struct drm_device *dev = node->minor->dev;
 145         drm_i915_private_t *dev_priv = dev->dev_private;
 146
 147         if (dev_priv->hw_status_page != NULL) {
 148                 seq_printf(m, "Current sequence: %d\n",
 149                            i915_get_gem_seqno(dev));
 150         } else {
 151                 seq_printf(m, "Current sequence: hws uninitialized\n");
 152         }
 153         seq_printf(m, "Waiter sequence:  %d\n",
 154                         dev_priv->mm.waiting_gem_seqno);
 155         seq_printf(m, "IRQ sequence:     %d\n", dev_priv->mm.irq_gem_seqno);
 156         return 0;
 157 }
 158
 159
 160 static int i915_interrupt_info(struct seq_file *m, void *data)
 161 {
 162         struct drm_info_node *node = (struct drm_info_node *) m->private;
 163         struct drm_device *dev = node->minor->dev;
 164         drm_i915_private_t *dev_priv = dev->dev_private;
 165
 166         if (!HAS_PCH_SPLIT(dev)) {
 167                 seq_printf(m, "Interrupt enable:    %08x\n",
 168                            I915_READ(IER));
 169                 seq_printf(m, "Interrupt identity:  %08x\n",
 170                            I915_READ(IIR));
 171                 seq_printf(m, "Interrupt mask:      %08x\n",
 172                            I915_READ(IMR));
 173                 seq_printf(m, "Pipe A stat:         %08x\n",
 174                            I915_READ(PIPEASTAT));
 175                 seq_printf(m, "Pipe B stat:         %08x\n",
 176                            I915_READ(PIPEBSTAT));
 177         } else {
 178                 seq_printf(m, "North Display Interrupt enable:          %08x\n",
 179                            I915_READ(DEIER));
 180                 seq_printf(m, "North Display Interrupt identity:        %08x\n",
 181                            I915_READ(DEIIR));
 182                 seq_printf(m, "North Display Interrupt mask:            %08x\n",
 183                            I915_READ(DEIMR));
 184                 seq_printf(m, "South Display Interrupt enable:          %08x\n",
 185                            I915_READ(SDEIER));
 186                 seq_printf(m, "South Display Interrupt identity:        %08x\n",
 187                            I915_READ(SDEIIR));
 188                 seq_printf(m, "South Display Interrupt mask:            %08x\n",
 189                            I915_READ(SDEIMR));
 190                 seq_printf(m, "Graphics Interrupt enable:               %08x\n",
 191                            I915_READ(GTIER));
 192                 seq_printf(m, "Graphics Interrupt identity:             %08x\n",
 193                            I915_READ(GTIIR));
 194                 seq_printf(m, "Graphics Interrupt mask:         %08x\n",
 195                            I915_READ(GTIMR));
 196         }
 197         seq_printf(m, "Interrupts received: %d\n",
 198                    atomic_read(&dev_priv->irq_received));
 199         if (dev_priv->hw_status_page != NULL) {
 200                 seq_printf(m, "Current sequence:    %d\n",
 201                            i915_get_gem_seqno(dev));
 202         } else {
 203                 seq_printf(m, "Current sequence:    hws uninitialized\n");
 204         }
 205         seq_printf(m, "Waiter sequence:     %d\n",
 206                    dev_priv->mm.waiting_gem_seqno);
 207         seq_printf(m, "IRQ sequence:        %d\n",
 208                    dev_priv->mm.irq_gem_seqno);
 209         return 0;
 210 }
 211
 212 static int i915_gem_fence_regs_info(struct seq_file *m, void *data)
 213 {
 214         struct drm_info_node *node = (struct drm_info_node *) m->private;
 215         struct drm_device *dev = node->minor->dev;
 216         drm_i915_private_t *dev_priv = dev->dev_private;
 217         int i;
 218
 219         seq_printf(m, "Reserved fences = %d\n", dev_priv->fence_reg_start);
 220         seq_printf(m, "Total fences = %d\n", dev_priv->num_fence_regs);
 221         for (i = 0; i < dev_priv->num_fence_regs; i++) {
 222                 struct drm_gem_object *obj = dev_priv->fence_regs[i].obj;
 223
 224                 if (obj == NULL) {
 225                         seq_printf(m, "Fenced object[%2d] = unused\n", i);
 226                 } else {
 227                         struct drm_i915_gem_object *obj_priv;
 228
 229                         obj_priv = to_intel_bo(obj);
 230                         seq_printf(m, "Fenced object[%2d] = %p: %s "
 231                                    "%08x %08zx %08x %s %08x %08x %d",
 232                                    i, obj, get_pin_flag(obj_priv),
 233                                    obj_priv->gtt_offset,
 234                                    obj->size, obj_priv->stride,
 235                                    get_tiling_flag(obj_priv),
 236                                    obj->read_domains, obj->write_domain,
 237                                    obj_priv->last_rendering_seqno);
 238                         if (obj->name)
 239                                 seq_printf(m, " (name: %d)", obj->name);
 240                         seq_printf(m, "\n");
 241                 }
 242         }
 243
 244         return 0;
 245 }
 246
 247 static int i915_hws_info(struct seq_file *m, void *data)
 248 {
 249         struct drm_info_node *node = (struct drm_info_node *) m->private;
 250         struct drm_device *dev = node->minor->dev;
 251         drm_i915_private_t *dev_priv = dev->dev_private;
 252         int i;
 253         volatile u32 *hws;
 254
 255         hws = (volatile u32 *)dev_priv->hw_status_page;
 256         if (hws == NULL)
 257                 return 0;
 258
 259         for (i = 0; i < 4096 / sizeof(u32) / 4; i += 4) {
 260                 seq_printf(m, "0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
 261                            i * 4,
 262                            hws[i], hws[i + 1], hws[i + 2], hws[i + 3]);
 263         }
 264         return 0;
 265 }
 266
 267 static void i915_dump_pages(struct seq_file *m, struct page **pages, int page_count)
 268 {
 269         int page, i;
 270         uint32_t *mem;
 271
 272         for (page = 0; page < page_count; page++) {
 273                 mem = kmap_atomic(pages[page], KM_USER0);
 274                 for (i = 0; i < PAGE_SIZE; i += 4)
 275                         seq_printf(m, "%08x :  %08x\n", i, mem[i / 4]);
 276                 kunmap_atomic(mem, KM_USER0);
 277         }
 278 }
 279
 280 static int i915_batchbuffer_info(struct seq_file *m, void *data)
 281 {
 282         struct drm_info_node *node = (struct drm_info_node *) m->private;
 283         struct drm_device *dev = node->minor->dev;
 284         drm_i915_private_t *dev_priv = dev->dev_private;
 285         struct drm_gem_object *obj;
 286         struct drm_i915_gem_object *obj_priv;
 287         int ret;
 288
 289         spin_lock(&dev_priv->mm.active_list_lock);
 290
 291         list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {
 292                 obj = obj_priv->obj;
 293                 if (obj->read_domains & I915_GEM_DOMAIN_COMMAND) {
 294                     ret = i915_gem_object_get_pages(obj, 0);
 295                     if (ret) {
 296                             DRM_ERROR("Failed to get pages: %d\n", ret);
 297                             spin_unlock(&dev_priv->mm.active_list_lock);
 298                             return ret;
 299                     }
 300
 301                     seq_printf(m, "--- gtt_offset = 0x%08x\n", obj_priv->gtt_offset);
 302                     i915_dump_pages(m, obj_priv->pages, obj->size / PAGE_SIZE);
 303
 304                     i915_gem_object_put_pages(obj);
 305                 }
 306         }
 307
 308         spin_unlock(&dev_priv->mm.active_list_lock);
 309
 310         return 0;
 311 }
 312
 313 static int i915_ringbuffer_data(struct seq_file *m, void *data)
 314 {
 315         struct drm_info_node *node = (struct drm_info_node *) m->private;
 316         struct drm_device *dev = node->minor->dev;
 317         drm_i915_private_t *dev_priv = dev->dev_private;
 318         u8 *virt;
 319         uint32_t *ptr, off;
 320
 321         if (!dev_priv->ring.ring_obj) {
 322                 seq_printf(m, "No ringbuffer setup\n");
 323                 return 0;
 324         }
 325
 326         virt = dev_priv->ring.virtual_start;
 327
 328         for (off = 0; off < dev_priv->ring.Size; off += 4) {
 329                 ptr = (uint32_t *)(virt + off);
 330                 seq_printf(m, "%08x :  %08x\n", off, *ptr);
 331         }
 332
 333         return 0;
 334 }
 335
 336 static int i915_ringbuffer_info(struct seq_file *m, void *data)
 337 {
 338         struct drm_info_node *node = (struct drm_info_node *) m->private;
 339         struct drm_device *dev = node->minor->dev;
 340         drm_i915_private_t *dev_priv = dev->dev_private;
 341         unsigned int head, tail;
 342
 343         head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 344         tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 345
 346         seq_printf(m, "RingHead :  %08x\n", head);
 347         seq_printf(m, "RingTail :  %08x\n", tail);
 348         seq_printf(m, "RingSize :  %08lx\n", dev_priv->ring.Size);
 349         seq_printf(m, "Acthd :     %08x\n", I915_READ(IS_I965G(dev) ? ACTHD_I965 : ACTHD));
 350
 351         return 0;
 352 }
 353
 354 static const char *pin_flag(int pinned)
 355 {
 356         if (pinned > 0)
 357                 return " P";
 358         else if (pinned < 0)
 359                 return " p";
 360         else
 361                 return "";
 362 }
 363
 364 static const char *tiling_flag(int tiling)
 365 {
 366         switch (tiling) {
 367         default:
 368         case I915_TILING_NONE: return "";
 369         case I915_TILING_X: return " X";
 370         case I915_TILING_Y: return " Y";
 371         }
 372 }
 373
 374 static const char *dirty_flag(int dirty)
 375 {
 376         return dirty ? " dirty" : "";
 377 }
 378
 379 static const char *purgeable_flag(int purgeable)
 380 {
 381         return purgeable ? " purgeable" : "";
 382 }
 383
 384 static int i915_error_state(struct seq_file *m, void *unused)
 385 {
 386         struct drm_info_node *node = (struct drm_info_node *) m->private;
 387         struct drm_device *dev = node->minor->dev;
 388         drm_i915_private_t *dev_priv = dev->dev_private;
 389         struct drm_i915_error_state *error;
 390         unsigned long flags;
 391         int i, page, offset, elt;
 392
 393         spin_lock_irqsave(&dev_priv->error_lock, flags);
 394         if (!dev_priv->first_error) {
 395                 seq_printf(m, "no error state collected\n");
 396                 goto out;
 397         }
 398
 399         error = dev_priv->first_error;
 400
 401         seq_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
 402                    error->time.tv_usec);
 403         seq_printf(m, "PCI ID: 0x%04x\n", dev->pci_device);
 404         seq_printf(m, "EIR: 0x%08x\n", error->eir);
 405         seq_printf(m, "  PGTBL_ER: 0x%08x\n", error->pgtbl_er);
 406         seq_printf(m, "  INSTPM: 0x%08x\n", error->instpm);
 407         seq_printf(m, "  IPEIR: 0x%08x\n", error->ipeir);
 408         seq_printf(m, "  IPEHR: 0x%08x\n", error->ipehr);
 409         seq_printf(m, "  INSTDONE: 0x%08x\n", error->instdone);
 410         seq_printf(m, "  ACTHD: 0x%08x\n", error->acthd);
 411         if (IS_I965G(dev)) {
 412                 seq_printf(m, "  INSTPS: 0x%08x\n", error->instps);
 413                 seq_printf(m, "  INSTDONE1: 0x%08x\n", error->instdone1);
 414         }
 415         seq_printf(m, "seqno: 0x%08x\n", error->seqno);
 416
 417         if (error->active_bo_count) {
 418                 seq_printf(m, "Buffers [%d]:\n", error->active_bo_count);
 419
 420                 for (i = 0; i < error->active_bo_count; i++) {
 421                         seq_printf(m, "  %08x %8zd %08x %08x %08x%s%s%s%s",
 422                                    error->active_bo[i].gtt_offset,
 423                                    error->active_bo[i].size,
 424                                    error->active_bo[i].read_domains,
 425                                    error->active_bo[i].write_domain,
 426                                    error->active_bo[i].seqno,
 427                                    pin_flag(error->active_bo[i].pinned),
 428                                    tiling_flag(error->active_bo[i].tiling),
 429                                    dirty_flag(error->active_bo[i].dirty),
 430                                    purgeable_flag(error->active_bo[i].purgeable));
 431
 432                         if (error->active_bo[i].name)
 433                                 seq_printf(m, " (name: %d)", error->active_bo[i].name);
 434                         if (error->active_bo[i].fence_reg != I915_FENCE_REG_NONE)
 435                                 seq_printf(m, " (fence: %d)", error->active_bo[i].fence_reg);
 436
 437                         seq_printf(m, "\n");
 438                 }
 439         }
 440
 441         for (i = 0; i < ARRAY_SIZE(error->batchbuffer); i++) {
 442                 if (error->batchbuffer[i]) {
 443                         struct drm_i915_error_object *obj = error->batchbuffer[i];
 444
 445                         seq_printf(m, "--- gtt_offset = 0x%08x\n", obj->gtt_offset);
 446                         offset = 0;
 447                         for (page = 0; page < obj->page_count; page++) {
 448                                 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
 449                                         seq_printf(m, "%08x :  %08x\n", offset, obj->pages[page][elt]);
 450                                         offset += 4;
 451                                 }
 452                         }
 453                 }
 454         }
 455
 456         if (error->ringbuffer) {
 457                 struct drm_i915_error_object *obj = error->ringbuffer;
 458
 459                 seq_printf(m, "--- ringbuffer = 0x%08x\n", obj->gtt_offset);
 460                 offset = 0;
 461                 for (page = 0; page < obj->page_count; page++) {
 462                         for (elt = 0; elt < PAGE_SIZE/4; elt++) {
 463                                 seq_printf(m, "%08x :  %08x\n", offset, obj->pages[page][elt]);
 464                                 offset += 4;
 465                         }
 466                 }
 467         }
 468
 469 out:
 470         spin_unlock_irqrestore(&dev_priv->error_lock, flags);
 471
 472         return 0;
 473 }
 474
 475 static int i915_rstdby_delays(struct seq_file *m, void *unused)
 476 {
 477         struct drm_info_node *node = (struct drm_info_node *) m->private;
 478         struct drm_device *dev = node->minor->dev;
 479         drm_i915_private_t *dev_priv = dev->dev_private;
 480         u16 crstanddelay = I915_READ16(CRSTANDVID);
 481
 482         seq_printf(m, "w/ctx: %d, w/o ctx: %d\n", (crstanddelay >> 8) & 0x3f, (crstanddelay & 0x3f));
 483
 484         return 0;
 485 }
 486
 487 static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 488 {
 489         struct drm_info_node *node = (struct drm_info_node *) m->private;
 490         struct drm_device *dev = node->minor->dev;
 491         drm_i915_private_t *dev_priv = dev->dev_private;
 492         u16 rgvswctl = I915_READ16(MEMSWCTL);
 493
 494         seq_printf(m, "Last command: 0x%01x\n", (rgvswctl >> 13) & 0x3);
 495         seq_printf(m, "Command status: %d\n", (rgvswctl >> 12) & 1);
 496         seq_printf(m, "P%d DELAY 0x%02x\n", (rgvswctl >> 8) & 0xf,
 497                    rgvswctl & 0x3f);
 498
 499         return 0;
 500 }
 501
 502 static int i915_delayfreq_table(struct seq_file *m, void *unused)
 503 {
 504         struct drm_info_node *node = (struct drm_info_node *) m->private;
 505         struct drm_device *dev = node->minor->dev;
 506         drm_i915_private_t *dev_priv = dev->dev_private;
 507         u32 delayfreq;
 508         int i;
 509
 510         for (i = 0; i < 16; i++) {
 511                 delayfreq = I915_READ(PXVFREQ_BASE + i * 4);
 512                 seq_printf(m, "P%02dVIDFREQ: 0x%08x\n", i, delayfreq);
 513         }
 514
 515         return 0;
 516 }
 517
 518 static inline int MAP_TO_MV(int map)
 519 {
 520         return 1250 - (map * 25);
 521 }
 522
 523 static int i915_inttoext_table(struct seq_file *m, void *unused)
 524 {
 525         struct drm_info_node *node = (struct drm_info_node *) m->private;
 526         struct drm_device *dev = node->minor->dev;
 527         drm_i915_private_t *dev_priv = dev->dev_private;
 528         u32 inttoext;
 529         int i;
 530
 531         for (i = 1; i <= 32; i++) {
 532                 inttoext = I915_READ(INTTOEXT_BASE_ILK + i * 4);
 533                 seq_printf(m, "INTTOEXT%02d: 0x%08x\n", i, inttoext);
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int i915_drpc_info(struct seq_file *m, void *unused)
 540 {
 541         struct drm_info_node *node = (struct drm_info_node *) m->private;
 542         struct drm_device *dev = node->minor->dev;
 543         drm_i915_private_t *dev_priv = dev->dev_private;
 544         u32 rgvmodectl = I915_READ(MEMMODECTL);
 545
 546         seq_printf(m, "HD boost: %s\n", (rgvmodectl & MEMMODE_BOOST_EN) ?
 547                    "yes" : "no");
 548         seq_printf(m, "Boost freq: %d\n",
 549                    (rgvmodectl & MEMMODE_BOOST_FREQ_MASK) >>
 550                    MEMMODE_BOOST_FREQ_SHIFT);
 551         seq_printf(m, "HW control enabled: %s\n",
 552                    rgvmodectl & MEMMODE_HWIDLE_EN ? "yes" : "no");
 553         seq_printf(m, "SW control enabled: %s\n",
 554                    rgvmodectl & MEMMODE_SWMODE_EN ? "yes" : "no");
 555         seq_printf(m, "Gated voltage change: %s\n",
 556                    rgvmodectl & MEMMODE_RCLK_GATE ? "yes" : "no");
 557         seq_printf(m, "Starting frequency: P%d\n",
 558                    (rgvmodectl & MEMMODE_FSTART_MASK) >> MEMMODE_FSTART_SHIFT);
 559         seq_printf(m, "Max frequency: P%d\n",
 560                    (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT);
 561         seq_printf(m, "Min frequency: P%d\n", (rgvmodectl & MEMMODE_FMIN_MASK));
 562
 563         return 0;
 564 }
 565
 566 static int i915_fbc_status(struct seq_file *m, void *unused)
 567 {
 568         struct drm_info_node *node = (struct drm_info_node *) m->private;
 569         struct drm_device *dev = node->minor->dev;
 570         struct drm_crtc *crtc;
 571         drm_i915_private_t *dev_priv = dev->dev_private;
 572         bool fbc_enabled = false;
 573
 574         if (!dev_priv->display.fbc_enabled) {
 575                 seq_printf(m, "FBC unsupported on this chipset\n");
 576                 return 0;
 577         }
 578
 579         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 580                 if (!crtc->enabled)
 581                         continue;
 582                 if (dev_priv->display.fbc_enabled(crtc))
 583                         fbc_enabled = true;
 584         }
 585
 586         if (fbc_enabled) {
 587                 seq_printf(m, "FBC enabled\n");
 588         } else {
 589                 seq_printf(m, "FBC disabled: ");
 590                 switch (dev_priv->no_fbc_reason) {
 591                 case FBC_STOLEN_TOO_SMALL:
 592                         seq_printf(m, "not enough stolen memory");
 593                         break;
 594                 case FBC_UNSUPPORTED_MODE:
 595                         seq_printf(m, "mode not supported");
 596                         break;
 597                 case FBC_MODE_TOO_LARGE:
 598                         seq_printf(m, "mode too large");
 599                         break;
 600                 case FBC_BAD_PLANE:
 601                         seq_printf(m, "FBC unsupported on plane");
 602                         break;
 603                 case FBC_NOT_TILED:
 604                         seq_printf(m, "scanout buffer not tiled");
 605                         break;
 606                 default:
 607                         seq_printf(m, "unknown reason");
 608                 }
 609                 seq_printf(m, "\n");
 610         }
 611         return 0;
 612 }
 613
 614 static int i915_sr_status(struct seq_file *m, void *unused)
 615 {
 616         struct drm_info_node *node = (struct drm_info_node *) m->private;
 617         struct drm_device *dev = node->minor->dev;
 618         drm_i915_private_t *dev_priv = dev->dev_private;
 619         bool sr_enabled = false;
 620
 621         if (IS_I965G(dev) || IS_I945G(dev) || IS_I945GM(dev))
 622                 sr_enabled = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;
 623         else if (IS_I915GM(dev))
 624                 sr_enabled = I915_READ(INSTPM) & INSTPM_SELF_EN;
 625         else if (IS_PINEVIEW(dev))
 626                 sr_enabled = I915_READ(DSPFW3) & PINEVIEW_SELF_REFRESH_EN;
 627
 628         seq_printf(m, "self-refresh: %s\n", sr_enabled ? "enabled" :
 629                    "disabled");
 630
 631         return 0;
 632 }
 633
 634 static int
 635 i915_wedged_open(struct inode *inode,
 636                  struct file *filp)
 637 {
 638         filp->private_data = inode->i_private;
 639         return 0;
 640 }
 641
 642 static ssize_t
 643 i915_wedged_read(struct file *filp,
 644                  char __user *ubuf,
 645                  size_t max,
 646                  loff_t *ppos)
 647 {
 648         struct drm_device *dev = filp->private_data;
 649         drm_i915_private_t *dev_priv = dev->dev_private;
 650         char buf[80];
 651         int len;
 652
 653         len = snprintf(buf, sizeof (buf),
 654                        "wedged :  %d\n",
 655                        atomic_read(&dev_priv->mm.wedged));
 656
 657         return simple_read_from_buffer(ubuf, max, ppos, buf, len);
 658 }
 659
 660 static ssize_t
 661 i915_wedged_write(struct file *filp,
 662                   const char __user *ubuf,
 663                   size_t cnt,
 664                   loff_t *ppos)
 665 {
 666         struct drm_device *dev = filp->private_data;
 667         drm_i915_private_t *dev_priv = dev->dev_private;
 668         char buf[20];
 669         int val = 1;
 670
 671         if (cnt > 0) {
 672                 if (cnt > sizeof (buf) - 1)
 673                         return -EINVAL;
 674
 675                 if (copy_from_user(buf, ubuf, cnt))
 676                         return -EFAULT;
 677                 buf[cnt] = 0;
 678
 679                 val = simple_strtoul(buf, NULL, 0);
 680         }
 681
 682         DRM_INFO("Manually setting wedged to %d\n", val);
 683
 684         atomic_set(&dev_priv->mm.wedged, val);
 685         if (val) {
 686                 DRM_WAKEUP(&dev_priv->irq_queue);
 687                 queue_work(dev_priv->wq, &dev_priv->error_work);
 688         }
 689
 690         return cnt;
 691 }
 692
 693 static const struct file_operations i915_wedged_fops = {
 694         .owner = THIS_MODULE,
 695         .open = i915_wedged_open,
 696         .read = i915_wedged_read,
 697         .write = i915_wedged_write,
 698 };
 699
 700 /* As the drm_debugfs_init() routines are called before dev->dev_private is
 701  * allocated we need to hook into the minor for release. */
 702 static int
 703 drm_add_fake_info_node(struct drm_minor *minor,
 704                        struct dentry *ent,
 705                        const void *key)
 706 {
 707         struct drm_info_node *node;
 708
 709         node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
 710         if (node == NULL) {
 711                 debugfs_remove(ent);
 712                 return -ENOMEM;
 713         }
 714
 715         node->minor = minor;
 716         node->dent = ent;
 717         node->info_ent = (void *) key;
 718         list_add(&node->list, &minor->debugfs_nodes.list);
 719
 720         return 0;
 721 }
 722
 723 static int i915_wedged_create(struct dentry *root, struct drm_minor *minor)
 724 {
 725         struct drm_device *dev = minor->dev;
 726         struct dentry *ent;
 727
 728         ent = debugfs_create_file("i915_wedged",
 729                                   S_IRUGO | S_IWUSR,
 730                                   root, dev,
 731                                   &i915_wedged_fops);
 732         if (IS_ERR(ent))
 733                 return PTR_ERR(ent);
 734
 735         return drm_add_fake_info_node(minor, ent, &i915_wedged_fops);
 736 }
 737
 738 static struct drm_info_list i915_debugfs_list[] = {
 739         {"i915_gem_active", i915_gem_object_list_info, 0, (void *) ACTIVE_LIST},
 740         {"i915_gem_flushing", i915_gem_object_list_info, 0, (void *) FLUSHING_LIST},
 741         {"i915_gem_inactive", i915_gem_object_list_info, 0, (void *) INACTIVE_LIST},
 742         {"i915_gem_request", i915_gem_request_info, 0},
 743         {"i915_gem_seqno", i915_gem_seqno_info, 0},
 744         {"i915_gem_fence_regs", i915_gem_fence_regs_info, 0},
 745         {"i915_gem_interrupt", i915_interrupt_info, 0},
 746         {"i915_gem_hws", i915_hws_info, 0},
 747         {"i915_ringbuffer_data", i915_ringbuffer_data, 0},
 748         {"i915_ringbuffer_info", i915_ringbuffer_info, 0},
 749         {"i915_batchbuffers", i915_batchbuffer_info, 0},
 750         {"i915_error_state", i915_error_state, 0},
 751         {"i915_rstdby_delays", i915_rstdby_delays, 0},
 752         {"i915_cur_delayinfo", i915_cur_delayinfo, 0},
 753         {"i915_delayfreq_table", i915_delayfreq_table, 0},
 754         {"i915_inttoext_table", i915_inttoext_table, 0},
 755         {"i915_drpc_info", i915_drpc_info, 0},
 756         {"i915_fbc_status", i915_fbc_status, 0},
 757         {"i915_sr_status", i915_sr_status, 0},
 758 };
 759 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)
 760
 761 int i915_debugfs_init(struct drm_minor *minor)
 762 {
 763         int ret;
 764
 765         ret = i915_wedged_create(minor->debugfs_root, minor);
 766         if (ret)
 767                 return ret;
 768
 769         return drm_debugfs_create_files(i915_debugfs_list,
 770                                         I915_DEBUGFS_ENTRIES,
 771                                         minor->debugfs_root, minor);
 772 }
 773
 774 void i915_debugfs_cleanup(struct drm_minor *minor)
 775 {
 776         drm_debugfs_remove_files(i915_debugfs_list,
 777                                  I915_DEBUGFS_ENTRIES, minor);
 778         drm_debugfs_remove_files((struct drm_info_list *) &i915_wedged_fops,
 779                                  1, minor);
 780 }
 781
 782 #endif /* CONFIG_DEBUG_FS */