drivers/gpu/drm/radeon/radeon_ring.c

   1 /*
   2  * Copyright 2008 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  * Copyright 2009 Jerome Glisse.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors: Dave Airlie
  25  *          Alex Deucher
  26  *          Jerome Glisse
  27  *          Christian König
  28  */
  29 #include <linux/seq_file.h>
  30 #include <linux/slab.h>
  31 #include "drmP.h"
  32 #include "radeon_drm.h"
  33 #include "radeon_reg.h"
  34 #include "radeon.h"
  35 #include "atom.h"
  36
  37 /*
  38  * IB.
  39  */
  40 int radeon_debugfs_sa_init(struct radeon_device *rdev);
  41
  42 int radeon_ib_get(struct radeon_device *rdev, int ring,
  43                   struct radeon_ib *ib, unsigned size)
  44 {
  45         int i, r;
  46
  47         r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &ib->sa_bo, size, 256, true);
  48         if (r) {
  49                 dev_err(rdev->dev, "failed to get a new IB (%d)\n", r);
  50                 return r;
  51         }
  52
  53         r = radeon_semaphore_create(rdev, &ib->semaphore);
  54         if (r) {
  55                 return r;
  56         }
  57
  58         ib->ring = ring;
  59         ib->fence = NULL;
  60         ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo);
  61         ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo);
  62         ib->vm_id = 0;
  63         ib->is_const_ib = false;
  64         for (i = 0; i < RADEON_NUM_RINGS; ++i)
  65                 ib->sync_to[i] = NULL;
  66
  67         return 0;
  68 }
  69
  70 void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib)
  71 {
  72         radeon_semaphore_free(rdev, &ib->semaphore, ib->fence);
  73         radeon_sa_bo_free(rdev, &ib->sa_bo, ib->fence);
  74         radeon_fence_unref(&ib->fence);
  75 }
  76
  77 int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib,
  78                        struct radeon_ib *const_ib)
  79 {
  80         struct radeon_ring *ring = &rdev->ring[ib->ring];
  81         bool need_sync = false;
  82         int i, r = 0;
  83
  84         if (!ib->length_dw || !ring->ready) {
  85                 /* TODO: Nothings in the ib we should report. */
  86                 dev_err(rdev->dev, "couldn't schedule ib\n");
  87                 return -EINVAL;
  88         }
  89
  90         /* 64 dwords should be enough for fence too */
  91         r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_RINGS * 8);
  92         if (r) {
  93                 dev_err(rdev->dev, "scheduling IB failed (%d).\n", r);
  94                 return r;
  95         }
  96         for (i = 0; i < RADEON_NUM_RINGS; ++i) {
  97                 struct radeon_fence *fence = ib->sync_to[i];
  98                 if (radeon_fence_need_sync(fence, ib->ring)) {
  99                         need_sync = true;
 100                         radeon_semaphore_sync_rings(rdev, ib->semaphore,
 101                                                     fence->ring, ib->ring);
 102                         radeon_fence_note_sync(fence, ib->ring);
 103                 }
 104         }
 105         /* immediately free semaphore when we don't need to sync */
 106         if (!need_sync) {
 107                 radeon_semaphore_free(rdev, &ib->semaphore, NULL);
 108         }
 109         if (const_ib) {
 110                 radeon_ring_ib_execute(rdev, const_ib->ring, const_ib);
 111                 radeon_semaphore_free(rdev, &const_ib->semaphore, NULL);
 112         }
 113         radeon_ring_ib_execute(rdev, ib->ring, ib);
 114         r = radeon_fence_emit(rdev, &ib->fence, ib->ring);
 115         if (r) {
 116                 dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r);
 117                 radeon_ring_unlock_undo(rdev, ring);
 118                 return r;
 119         }
 120         if (const_ib) {
 121                 const_ib->fence = radeon_fence_ref(ib->fence);
 122         }
 123         radeon_ring_unlock_commit(rdev, ring);
 124         return 0;
 125 }
 126
 127 int radeon_ib_pool_init(struct radeon_device *rdev)
 128 {
 129         int r;
 130
 131         if (rdev->ib_pool_ready) {
 132                 return 0;
 133         }
 134         r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,
 135                                       RADEON_IB_POOL_SIZE*64*1024,
 136                                       RADEON_GEM_DOMAIN_GTT);
 137         if (r) {
 138                 return r;
 139         }
 140
 141         r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo);
 142         if (r) {
 143                 return r;
 144         }
 145
 146         rdev->ib_pool_ready = true;
 147         if (radeon_debugfs_sa_init(rdev)) {
 148                 dev_err(rdev->dev, "failed to register debugfs file for SA\n");
 149         }
 150         return 0;
 151 }
 152
 153 void radeon_ib_pool_fini(struct radeon_device *rdev)
 154 {
 155         if (rdev->ib_pool_ready) {
 156                 radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo);
 157                 radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo);
 158                 rdev->ib_pool_ready = false;
 159         }
 160 }
 161
 162 int radeon_ib_ring_tests(struct radeon_device *rdev)
 163 {
 164         unsigned i;
 165         int r;
 166
 167         for (i = 0; i < RADEON_NUM_RINGS; ++i) {
 168                 struct radeon_ring *ring = &rdev->ring[i];
 169
 170                 if (!ring->ready)
 171                         continue;
 172
 173                 r = radeon_ib_test(rdev, i, ring);
 174                 if (r) {
 175                         ring->ready = false;
 176
 177                         if (i == RADEON_RING_TYPE_GFX_INDEX) {
 178                                 /* oh, oh, that's really bad */
 179                                 DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n", r);
 180                                 rdev->accel_working = false;
 181                                 return r;
 182
 183                         } else {
 184                                 /* still not good, but we can live with it */
 185                                 DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n", i, r);
 186                         }
 187                 }
 188         }
 189         return 0;
 190 }
 191
 192 /*
 193  * Ring.
 194  */
 195 int radeon_debugfs_ring_init(struct radeon_device *rdev, struct radeon_ring *ring);
 196
 197 void radeon_ring_write(struct radeon_ring *ring, uint32_t v)
 198 {
 199 #if DRM_DEBUG_CODE
 200         if (ring->count_dw <= 0) {
 201                 DRM_ERROR("radeon: writting more dword to ring than expected !\n");
 202         }
 203 #endif
 204         ring->ring[ring->wptr++] = v;
 205         ring->wptr &= ring->ptr_mask;
 206         ring->count_dw--;
 207         ring->ring_free_dw--;
 208 }
 209
 210 bool radeon_ring_supports_scratch_reg(struct radeon_device *rdev,
 211                                       struct radeon_ring *ring)
 212 {
 213         switch (ring->idx) {
 214         case RADEON_RING_TYPE_GFX_INDEX:
 215         case CAYMAN_RING_TYPE_CP1_INDEX:
 216         case CAYMAN_RING_TYPE_CP2_INDEX:
 217                 return true;
 218         default:
 219                 return false;
 220         }
 221 }
 222
 223 void radeon_ring_free_size(struct radeon_device *rdev, struct radeon_ring *ring)
 224 {
 225         u32 rptr;
 226
 227         if (rdev->wb.enabled)
 228                 rptr = le32_to_cpu(rdev->wb.wb[ring->rptr_offs/4]);
 229         else
 230                 rptr = RREG32(ring->rptr_reg);
 231         ring->rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift;
 232         /* This works because ring_size is a power of 2 */
 233         ring->ring_free_dw = (ring->rptr + (ring->ring_size / 4));
 234         ring->ring_free_dw -= ring->wptr;
 235         ring->ring_free_dw &= ring->ptr_mask;
 236         if (!ring->ring_free_dw) {
 237                 ring->ring_free_dw = ring->ring_size / 4;
 238         }
 239 }
 240
 241
 242 int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
 243 {
 244         int r;
 245
 246         /* Align requested size with padding so unlock_commit can
 247          * pad safely */
 248         ndw = (ndw + ring->align_mask) & ~ring->align_mask;
 249         while (ndw > (ring->ring_free_dw - 1)) {
 250                 radeon_ring_free_size(rdev, ring);
 251                 if (ndw < ring->ring_free_dw) {
 252                         break;
 253                 }
 254                 r = radeon_fence_wait_next_locked(rdev, ring->idx);
 255                 if (r)
 256                         return r;
 257         }
 258         ring->count_dw = ndw;
 259         ring->wptr_old = ring->wptr;
 260         return 0;
 261 }
 262
 263 int radeon_ring_lock(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
 264 {
 265         int r;
 266
 267         mutex_lock(&rdev->ring_lock);
 268         r = radeon_ring_alloc(rdev, ring, ndw);
 269         if (r) {
 270                 mutex_unlock(&rdev->ring_lock);
 271                 return r;
 272         }
 273         return 0;
 274 }
 275
 276 void radeon_ring_commit(struct radeon_device *rdev, struct radeon_ring *ring)
 277 {
 278         /* We pad to match fetch size */
 279         while (ring->wptr & ring->align_mask) {
 280                 radeon_ring_write(ring, ring->nop);
 281         }
 282         DRM_MEMORYBARRIER();
 283         WREG32(ring->wptr_reg, (ring->wptr << ring->ptr_reg_shift) & ring->ptr_reg_mask);
 284         (void)RREG32(ring->wptr_reg);
 285 }
 286
 287 void radeon_ring_unlock_commit(struct radeon_device *rdev, struct radeon_ring *ring)
 288 {
 289         radeon_ring_commit(rdev, ring);
 290         mutex_unlock(&rdev->ring_lock);
 291 }
 292
 293 void radeon_ring_undo(struct radeon_ring *ring)
 294 {
 295         ring->wptr = ring->wptr_old;
 296 }
 297
 298 void radeon_ring_unlock_undo(struct radeon_device *rdev, struct radeon_ring *ring)
 299 {
 300         radeon_ring_undo(ring);
 301         mutex_unlock(&rdev->ring_lock);
 302 }
 303
 304 void radeon_ring_force_activity(struct radeon_device *rdev, struct radeon_ring *ring)
 305 {
 306         int r;
 307
 308         radeon_ring_free_size(rdev, ring);
 309         if (ring->rptr == ring->wptr) {
 310                 r = radeon_ring_alloc(rdev, ring, 1);
 311                 if (!r) {
 312                         radeon_ring_write(ring, ring->nop);
 313                         radeon_ring_commit(rdev, ring);
 314                 }
 315         }
 316 }
 317
 318 void radeon_ring_lockup_update(struct radeon_ring *ring)
 319 {
 320         ring->last_rptr = ring->rptr;
 321         ring->last_activity = jiffies;
 322 }
 323
 324 /**
 325  * radeon_ring_test_lockup() - check if ring is lockedup by recording information
 326  * @rdev:       radeon device structure
 327  * @ring:       radeon_ring structure holding ring information
 328  *
 329  * We don't need to initialize the lockup tracking information as we will either
 330  * have CP rptr to a different value of jiffies wrap around which will force
 331  * initialization of the lockup tracking informations.
 332  *
 333  * A possible false positivie is if we get call after while and last_cp_rptr ==
 334  * the current CP rptr, even if it's unlikely it might happen. To avoid this
 335  * if the elapsed time since last call is bigger than 2 second than we return
 336  * false and update the tracking information. Due to this the caller must call
 337  * radeon_ring_test_lockup several time in less than 2sec for lockup to be reported
 338  * the fencing code should be cautious about that.
 339  *
 340  * Caller should write to the ring to force CP to do something so we don't get
 341  * false positive when CP is just gived nothing to do.
 342  *
 343  **/
 344 bool radeon_ring_test_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
 345 {
 346         unsigned long cjiffies, elapsed;
 347         uint32_t rptr;
 348
 349         cjiffies = jiffies;
 350         if (!time_after(cjiffies, ring->last_activity)) {
 351                 /* likely a wrap around */
 352                 radeon_ring_lockup_update(ring);
 353                 return false;
 354         }
 355         rptr = RREG32(ring->rptr_reg);
 356         ring->rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift;
 357         if (ring->rptr != ring->last_rptr) {
 358                 /* CP is still working no lockup */
 359                 radeon_ring_lockup_update(ring);
 360                 return false;
 361         }
 362         elapsed = jiffies_to_msecs(cjiffies - ring->last_activity);
 363         if (radeon_lockup_timeout && elapsed >= radeon_lockup_timeout) {
 364                 dev_err(rdev->dev, "GPU lockup CP stall for more than %lumsec\n", elapsed);
 365                 return true;
 366         }
 367         /* give a chance to the GPU ... */
 368         return false;
 369 }
 370
 371 /**
 372  * radeon_ring_backup - Back up the content of a ring
 373  *
 374  * @rdev: radeon_device pointer
 375  * @ring: the ring we want to back up
 376  *
 377  * Saves all unprocessed commits from a ring, returns the number of dwords saved.
 378  */
 379 unsigned radeon_ring_backup(struct radeon_device *rdev, struct radeon_ring *ring,
 380                             uint32_t **data)
 381 {
 382         unsigned size, ptr, i;
 383
 384         /* just in case lock the ring */
 385         mutex_lock(&rdev->ring_lock);
 386         *data = NULL;
 387
 388         if (ring->ring_obj == NULL) {
 389                 mutex_unlock(&rdev->ring_lock);
 390                 return 0;
 391         }
 392
 393         /* it doesn't make sense to save anything if all fences are signaled */
 394         if (!radeon_fence_count_emitted(rdev, ring->idx)) {
 395                 mutex_unlock(&rdev->ring_lock);
 396                 return 0;
 397         }
 398
 399         /* calculate the number of dw on the ring */
 400         if (ring->rptr_save_reg)
 401                 ptr = RREG32(ring->rptr_save_reg);
 402         else if (rdev->wb.enabled)
 403                 ptr = le32_to_cpu(*ring->next_rptr_cpu_addr);
 404         else {
 405                 /* no way to read back the next rptr */
 406                 mutex_unlock(&rdev->ring_lock);
 407                 return 0;
 408         }
 409
 410         size = ring->wptr + (ring->ring_size / 4);
 411         size -= ptr;
 412         size &= ring->ptr_mask;
 413         if (size == 0) {
 414                 mutex_unlock(&rdev->ring_lock);
 415                 return 0;
 416         }
 417
 418         /* and then save the content of the ring */
 419         *data = kmalloc(size * 4, GFP_KERNEL);
 420         for (i = 0; i < size; ++i) {
 421                 (*data)[i] = ring->ring[ptr++];
 422                 ptr &= ring->ptr_mask;
 423         }
 424
 425         mutex_unlock(&rdev->ring_lock);
 426         return size;
 427 }
 428
 429 /**
 430  * radeon_ring_restore - append saved commands to the ring again
 431  *
 432  * @rdev: radeon_device pointer
 433  * @ring: ring to append commands to
 434  * @size: number of dwords we want to write
 435  * @data: saved commands
 436  *
 437  * Allocates space on the ring and restore the previously saved commands.
 438  */
 439 int radeon_ring_restore(struct radeon_device *rdev, struct radeon_ring *ring,
 440                         unsigned size, uint32_t *data)
 441 {
 442         int i, r;
 443
 444         if (!size || !data)
 445                 return 0;
 446
 447         /* restore the saved ring content */
 448         r = radeon_ring_lock(rdev, ring, size);
 449         if (r)
 450                 return r;
 451
 452         for (i = 0; i < size; ++i) {
 453                 radeon_ring_write(ring, data[i]);
 454         }
 455
 456         radeon_ring_unlock_commit(rdev, ring);
 457         kfree(data);
 458         return 0;
 459 }
 460
 461 int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ring_size,
 462                      unsigned rptr_offs, unsigned rptr_reg, unsigned wptr_reg,
 463                      u32 ptr_reg_shift, u32 ptr_reg_mask, u32 nop)
 464 {
 465         int r;
 466
 467         ring->ring_size = ring_size;
 468         ring->rptr_offs = rptr_offs;
 469         ring->rptr_reg = rptr_reg;
 470         ring->wptr_reg = wptr_reg;
 471         ring->ptr_reg_shift = ptr_reg_shift;
 472         ring->ptr_reg_mask = ptr_reg_mask;
 473         ring->nop = nop;
 474         /* Allocate ring buffer */
 475         if (ring->ring_obj == NULL) {
 476                 r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true,
 477                                      RADEON_GEM_DOMAIN_GTT,
 478                                      NULL, &ring->ring_obj);
 479                 if (r) {
 480                         dev_err(rdev->dev, "(%d) ring create failed\n", r);
 481                         return r;
 482                 }
 483                 r = radeon_bo_reserve(ring->ring_obj, false);
 484                 if (unlikely(r != 0))
 485                         return r;
 486                 r = radeon_bo_pin(ring->ring_obj, RADEON_GEM_DOMAIN_GTT,
 487                                         &ring->gpu_addr);
 488                 if (r) {
 489                         radeon_bo_unreserve(ring->ring_obj);
 490                         dev_err(rdev->dev, "(%d) ring pin failed\n", r);
 491                         return r;
 492                 }
 493                 r = radeon_bo_kmap(ring->ring_obj,
 494                                        (void **)&ring->ring);
 495                 radeon_bo_unreserve(ring->ring_obj);
 496                 if (r) {
 497                         dev_err(rdev->dev, "(%d) ring map failed\n", r);
 498                         return r;
 499                 }
 500         }
 501         ring->ptr_mask = (ring->ring_size / 4) - 1;
 502         ring->ring_free_dw = ring->ring_size / 4;
 503         if (rdev->wb.enabled) {
 504                 u32 index = RADEON_WB_RING0_NEXT_RPTR + (ring->idx * 4);
 505                 ring->next_rptr_gpu_addr = rdev->wb.gpu_addr + index;
 506                 ring->next_rptr_cpu_addr = &rdev->wb.wb[index/4];
 507         }
 508         if (radeon_debugfs_ring_init(rdev, ring)) {
 509                 DRM_ERROR("Failed to register debugfs file for rings !\n");
 510         }
 511         return 0;
 512 }
 513
 514 void radeon_ring_fini(struct radeon_device *rdev, struct radeon_ring *ring)
 515 {
 516         int r;
 517         struct radeon_bo *ring_obj;
 518
 519         mutex_lock(&rdev->ring_lock);
 520         ring_obj = ring->ring_obj;
 521         ring->ready = false;
 522         ring->ring = NULL;
 523         ring->ring_obj = NULL;
 524         mutex_unlock(&rdev->ring_lock);
 525
 526         if (ring_obj) {
 527                 r = radeon_bo_reserve(ring_obj, false);
 528                 if (likely(r == 0)) {
 529                         radeon_bo_kunmap(ring_obj);
 530                         radeon_bo_unpin(ring_obj);
 531                         radeon_bo_unreserve(ring_obj);
 532                 }
 533                 radeon_bo_unref(&ring_obj);
 534         }
 535 }
 536
 537 /*
 538  * Debugfs info
 539  */
 540 #if defined(CONFIG_DEBUG_FS)
 541
 542 static int radeon_debugfs_ring_info(struct seq_file *m, void *data)
 543 {
 544         struct drm_info_node *node = (struct drm_info_node *) m->private;
 545         struct drm_device *dev = node->minor->dev;
 546         struct radeon_device *rdev = dev->dev_private;
 547         int ridx = *(int*)node->info_ent->data;
 548         struct radeon_ring *ring = &rdev->ring[ridx];
 549         unsigned count, i, j;
 550
 551         radeon_ring_free_size(rdev, ring);
 552         count = (ring->ring_size / 4) - ring->ring_free_dw;
 553         seq_printf(m, "wptr(0x%04x): 0x%08x\n", ring->wptr_reg, RREG32(ring->wptr_reg));
 554         seq_printf(m, "rptr(0x%04x): 0x%08x\n", ring->rptr_reg, RREG32(ring->rptr_reg));
 555         if (ring->rptr_save_reg) {
 556                 seq_printf(m, "rptr next(0x%04x): 0x%08x\n", ring->rptr_save_reg,
 557                            RREG32(ring->rptr_save_reg));
 558         }
 559         seq_printf(m, "driver's copy of the wptr: 0x%08x\n", ring->wptr);
 560         seq_printf(m, "driver's copy of the rptr: 0x%08x\n", ring->rptr);
 561         seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw);
 562         seq_printf(m, "%u dwords in ring\n", count);
 563         i = ring->rptr;
 564         for (j = 0; j <= count; j++) {
 565                 seq_printf(m, "r[%04d]=0x%08x\n", i, ring->ring[i]);
 566                 i = (i + 1) & ring->ptr_mask;
 567         }
 568         return 0;
 569 }
 570
 571 static int radeon_ring_type_gfx_index = RADEON_RING_TYPE_GFX_INDEX;
 572 static int cayman_ring_type_cp1_index = CAYMAN_RING_TYPE_CP1_INDEX;
 573 static int cayman_ring_type_cp2_index = CAYMAN_RING_TYPE_CP2_INDEX;
 574
 575 static struct drm_info_list radeon_debugfs_ring_info_list[] = {
 576         {"radeon_ring_gfx", radeon_debugfs_ring_info, 0, &radeon_ring_type_gfx_index},
 577         {"radeon_ring_cp1", radeon_debugfs_ring_info, 0, &cayman_ring_type_cp1_index},
 578         {"radeon_ring_cp2", radeon_debugfs_ring_info, 0, &cayman_ring_type_cp2_index},
 579 };
 580
 581 static int radeon_debugfs_sa_info(struct seq_file *m, void *data)
 582 {
 583         struct drm_info_node *node = (struct drm_info_node *) m->private;
 584         struct drm_device *dev = node->minor->dev;
 585         struct radeon_device *rdev = dev->dev_private;
 586
 587         radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m);
 588
 589         return 0;
 590
 591 }
 592
 593 static struct drm_info_list radeon_debugfs_sa_list[] = {
 594         {"radeon_sa_info", &radeon_debugfs_sa_info, 0, NULL},
 595 };
 596
 597 #endif
 598
 599 int radeon_debugfs_ring_init(struct radeon_device *rdev, struct radeon_ring *ring)
 600 {
 601 #if defined(CONFIG_DEBUG_FS)
 602         unsigned i;
 603         for (i = 0; i < ARRAY_SIZE(radeon_debugfs_ring_info_list); ++i) {
 604                 struct drm_info_list *info = &radeon_debugfs_ring_info_list[i];
 605                 int ridx = *(int*)radeon_debugfs_ring_info_list[i].data;
 606                 unsigned r;
 607
 608                 if (&rdev->ring[ridx] != ring)
 609                         continue;
 610
 611                 r = radeon_debugfs_add_files(rdev, info, 1);
 612                 if (r)
 613                         return r;
 614         }
 615 #endif
 616         return 0;
 617 }
 618
 619 int radeon_debugfs_sa_init(struct radeon_device *rdev)
 620 {
 621 #if defined(CONFIG_DEBUG_FS)
 622         return radeon_debugfs_add_files(rdev, radeon_debugfs_sa_list, 1);
 623 #else
 624         return 0;
 625 #endif
 626 }