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 {
  79         struct radeon_ring *ring = &rdev->ring[ib->ring];
  80         bool need_sync = false;
  81         int i, r = 0;
  82
  83         if (!ib->length_dw || !ring->ready) {
  84                 /* TODO: Nothings in the ib we should report. */
  85                 dev_err(rdev->dev, "couldn't schedule ib\n");
  86                 return -EINVAL;
  87         }
  88
  89         /* 64 dwords should be enough for fence too */
  90         r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_RINGS * 8);
  91         if (r) {
  92                 dev_err(rdev->dev, "scheduling IB failed (%d).\n", r);
  93                 return r;
  94         }
  95         for (i = 0; i < RADEON_NUM_RINGS; ++i) {
  96                 struct radeon_fence *fence = ib->sync_to[i];
  97                 if (radeon_fence_need_sync(fence, ib->ring)) {
  98                         need_sync = true;
  99                         radeon_semaphore_sync_rings(rdev, ib->semaphore,
 100                                                     fence->ring, ib->ring);
 101                         radeon_fence_note_sync(fence, ib->ring);
 102                 }
 103         }
 104         /* immediately free semaphore when we don't need to sync */
 105         if (!need_sync) {
 106                 radeon_semaphore_free(rdev, &ib->semaphore, NULL);
 107         }
 108         radeon_ring_ib_execute(rdev, ib->ring, ib);
 109         r = radeon_fence_emit(rdev, &ib->fence, ib->ring);
 110         if (r) {
 111                 dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r);
 112                 radeon_ring_unlock_undo(rdev, ring);
 113                 return r;
 114         }
 115         radeon_ring_unlock_commit(rdev, ring);
 116         return 0;
 117 }
 118
 119 int radeon_ib_pool_init(struct radeon_device *rdev)
 120 {
 121         int r;
 122
 123         if (rdev->ib_pool_ready) {
 124                 return 0;
 125         }
 126         r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,
 127                                       RADEON_IB_POOL_SIZE*64*1024,
 128                                       RADEON_GEM_DOMAIN_GTT);
 129         if (r) {
 130                 return r;
 131         }
 132
 133         r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo);
 134         if (r) {
 135                 return r;
 136         }
 137
 138         rdev->ib_pool_ready = true;
 139         if (radeon_debugfs_sa_init(rdev)) {
 140                 dev_err(rdev->dev, "failed to register debugfs file for SA\n");
 141         }
 142         return 0;
 143 }
 144
 145 void radeon_ib_pool_fini(struct radeon_device *rdev)
 146 {
 147         if (rdev->ib_pool_ready) {
 148                 radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo);
 149                 radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo);
 150                 rdev->ib_pool_ready = false;
 151         }
 152 }
 153
 154 int radeon_ib_ring_tests(struct radeon_device *rdev)
 155 {
 156         unsigned i;
 157         int r;
 158
 159         for (i = 0; i < RADEON_NUM_RINGS; ++i) {
 160                 struct radeon_ring *ring = &rdev->ring[i];
 161
 162                 if (!ring->ready)
 163                         continue;
 164
 165                 r = radeon_ib_test(rdev, i, ring);
 166                 if (r) {
 167                         ring->ready = false;
 168
 169                         if (i == RADEON_RING_TYPE_GFX_INDEX) {
 170                                 /* oh, oh, that's really bad */
 171                                 DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n", r);
 172                                 rdev->accel_working = false;
 173                                 return r;
 174
 175                         } else {
 176                                 /* still not good, but we can live with it */
 177                                 DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n", i, r);
 178                         }
 179                 }
 180         }
 181         return 0;
 182 }
 183
 184 /*
 185  * Ring.
 186  */
 187 int radeon_debugfs_ring_init(struct radeon_device *rdev, struct radeon_ring *ring);
 188
 189 void radeon_ring_write(struct radeon_ring *ring, uint32_t v)
 190 {
 191 #if DRM_DEBUG_CODE
 192         if (ring->count_dw <= 0) {
 193                 DRM_ERROR("radeon: writting more dword to ring than expected !\n");
 194         }
 195 #endif
 196         ring->ring[ring->wptr++] = v;
 197         ring->wptr &= ring->ptr_mask;
 198         ring->count_dw--;
 199         ring->ring_free_dw--;
 200 }
 201
 202 int radeon_ring_index(struct radeon_device *rdev, struct radeon_ring *ring)
 203 {
 204         /* r1xx-r5xx only has CP ring */
 205         if (rdev->family < CHIP_R600)
 206                 return RADEON_RING_TYPE_GFX_INDEX;
 207
 208         if (rdev->family >= CHIP_CAYMAN) {
 209                 if (ring == &rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX])
 210                         return CAYMAN_RING_TYPE_CP1_INDEX;
 211                 else if (ring == &rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX])
 212                         return CAYMAN_RING_TYPE_CP2_INDEX;
 213         }
 214         return RADEON_RING_TYPE_GFX_INDEX;
 215 }
 216
 217 void radeon_ring_free_size(struct radeon_device *rdev, struct radeon_ring *ring)
 218 {
 219         u32 rptr;
 220
 221         if (rdev->wb.enabled)
 222                 rptr = le32_to_cpu(rdev->wb.wb[ring->rptr_offs/4]);
 223         else
 224                 rptr = RREG32(ring->rptr_reg);
 225         ring->rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift;
 226         /* This works because ring_size is a power of 2 */
 227         ring->ring_free_dw = (ring->rptr + (ring->ring_size / 4));
 228         ring->ring_free_dw -= ring->wptr;
 229         ring->ring_free_dw &= ring->ptr_mask;
 230         if (!ring->ring_free_dw) {
 231                 ring->ring_free_dw = ring->ring_size / 4;
 232         }
 233 }
 234
 235
 236 int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
 237 {
 238         int r;
 239
 240         /* Align requested size with padding so unlock_commit can
 241          * pad safely */
 242         ndw = (ndw + ring->align_mask) & ~ring->align_mask;
 243         while (ndw > (ring->ring_free_dw - 1)) {
 244                 radeon_ring_free_size(rdev, ring);
 245                 if (ndw < ring->ring_free_dw) {
 246                         break;
 247                 }
 248                 r = radeon_fence_wait_next_locked(rdev, radeon_ring_index(rdev, ring));
 249                 if (r)
 250                         return r;
 251         }
 252         ring->count_dw = ndw;
 253         ring->wptr_old = ring->wptr;
 254         return 0;
 255 }
 256
 257 int radeon_ring_lock(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ndw)
 258 {
 259         int r;
 260
 261         mutex_lock(&rdev->ring_lock);
 262         r = radeon_ring_alloc(rdev, ring, ndw);
 263         if (r) {
 264                 mutex_unlock(&rdev->ring_lock);
 265                 return r;
 266         }
 267         return 0;
 268 }
 269
 270 void radeon_ring_commit(struct radeon_device *rdev, struct radeon_ring *ring)
 271 {
 272         /* We pad to match fetch size */
 273         while (ring->wptr & ring->align_mask) {
 274                 radeon_ring_write(ring, ring->nop);
 275         }
 276         DRM_MEMORYBARRIER();
 277         WREG32(ring->wptr_reg, (ring->wptr << ring->ptr_reg_shift) & ring->ptr_reg_mask);
 278         (void)RREG32(ring->wptr_reg);
 279 }
 280
 281 void radeon_ring_unlock_commit(struct radeon_device *rdev, struct radeon_ring *ring)
 282 {
 283         radeon_ring_commit(rdev, ring);
 284         mutex_unlock(&rdev->ring_lock);
 285 }
 286
 287 void radeon_ring_undo(struct radeon_ring *ring)
 288 {
 289         ring->wptr = ring->wptr_old;
 290 }
 291
 292 void radeon_ring_unlock_undo(struct radeon_device *rdev, struct radeon_ring *ring)
 293 {
 294         radeon_ring_undo(ring);
 295         mutex_unlock(&rdev->ring_lock);
 296 }
 297
 298 void radeon_ring_force_activity(struct radeon_device *rdev, struct radeon_ring *ring)
 299 {
 300         int r;
 301
 302         radeon_ring_free_size(rdev, ring);
 303         if (ring->rptr == ring->wptr) {
 304                 r = radeon_ring_alloc(rdev, ring, 1);
 305                 if (!r) {
 306                         radeon_ring_write(ring, ring->nop);
 307                         radeon_ring_commit(rdev, ring);
 308                 }
 309         }
 310 }
 311
 312 void radeon_ring_lockup_update(struct radeon_ring *ring)
 313 {
 314         ring->last_rptr = ring->rptr;
 315         ring->last_activity = jiffies;
 316 }
 317
 318 /**
 319  * radeon_ring_test_lockup() - check if ring is lockedup by recording information
 320  * @rdev:       radeon device structure
 321  * @ring:       radeon_ring structure holding ring information
 322  *
 323  * We don't need to initialize the lockup tracking information as we will either
 324  * have CP rptr to a different value of jiffies wrap around which will force
 325  * initialization of the lockup tracking informations.
 326  *
 327  * A possible false positivie is if we get call after while and last_cp_rptr ==
 328  * the current CP rptr, even if it's unlikely it might happen. To avoid this
 329  * if the elapsed time since last call is bigger than 2 second than we return
 330  * false and update the tracking information. Due to this the caller must call
 331  * radeon_ring_test_lockup several time in less than 2sec for lockup to be reported
 332  * the fencing code should be cautious about that.
 333  *
 334  * Caller should write to the ring to force CP to do something so we don't get
 335  * false positive when CP is just gived nothing to do.
 336  *
 337  **/
 338 bool radeon_ring_test_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
 339 {
 340         unsigned long cjiffies, elapsed;
 341         uint32_t rptr;
 342
 343         cjiffies = jiffies;
 344         if (!time_after(cjiffies, ring->last_activity)) {
 345                 /* likely a wrap around */
 346                 radeon_ring_lockup_update(ring);
 347                 return false;
 348         }
 349         rptr = RREG32(ring->rptr_reg);
 350         ring->rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift;
 351         if (ring->rptr != ring->last_rptr) {
 352                 /* CP is still working no lockup */
 353                 radeon_ring_lockup_update(ring);
 354                 return false;
 355         }
 356         elapsed = jiffies_to_msecs(cjiffies - ring->last_activity);
 357         if (radeon_lockup_timeout && elapsed >= radeon_lockup_timeout) {
 358                 dev_err(rdev->dev, "GPU lockup CP stall for more than %lumsec\n", elapsed);
 359                 return true;
 360         }
 361         /* give a chance to the GPU ... */
 362         return false;
 363 }
 364
 365 /**
 366  * radeon_ring_backup - Back up the content of a ring
 367  *
 368  * @rdev: radeon_device pointer
 369  * @ring: the ring we want to back up
 370  *
 371  * Saves all unprocessed commits from a ring, returns the number of dwords saved.
 372  */
 373 unsigned radeon_ring_backup(struct radeon_device *rdev, struct radeon_ring *ring,
 374                             uint32_t **data)
 375 {
 376         unsigned size, ptr, i;
 377         int ridx = radeon_ring_index(rdev, ring);
 378
 379         /* just in case lock the ring */
 380         mutex_lock(&rdev->ring_lock);
 381         *data = NULL;
 382
 383         if (ring->ring_obj == NULL || !ring->rptr_save_reg) {
 384                 mutex_unlock(&rdev->ring_lock);
 385                 return 0;
 386         }
 387
 388         /* it doesn't make sense to save anything if all fences are signaled */
 389         if (!radeon_fence_count_emitted(rdev, ridx)) {
 390                 mutex_unlock(&rdev->ring_lock);
 391                 return 0;
 392         }
 393
 394         /* calculate the number of dw on the ring */
 395         ptr = RREG32(ring->rptr_save_reg);
 396         size = ring->wptr + (ring->ring_size / 4);
 397         size -= ptr;
 398         size &= ring->ptr_mask;
 399         if (size == 0) {
 400                 mutex_unlock(&rdev->ring_lock);
 401                 return 0;
 402         }
 403
 404         /* and then save the content of the ring */
 405         *data = kmalloc(size * 4, GFP_KERNEL);
 406         for (i = 0; i < size; ++i) {
 407                 (*data)[i] = ring->ring[ptr++];
 408                 ptr &= ring->ptr_mask;
 409         }
 410
 411         mutex_unlock(&rdev->ring_lock);
 412         return size;
 413 }
 414
 415 /**
 416  * radeon_ring_restore - append saved commands to the ring again
 417  *
 418  * @rdev: radeon_device pointer
 419  * @ring: ring to append commands to
 420  * @size: number of dwords we want to write
 421  * @data: saved commands
 422  *
 423  * Allocates space on the ring and restore the previously saved commands.
 424  */
 425 int radeon_ring_restore(struct radeon_device *rdev, struct radeon_ring *ring,
 426                         unsigned size, uint32_t *data)
 427 {
 428         int i, r;
 429
 430         if (!size || !data)
 431                 return 0;
 432
 433         /* restore the saved ring content */
 434         r = radeon_ring_lock(rdev, ring, size);
 435         if (r)
 436                 return r;
 437
 438         for (i = 0; i < size; ++i) {
 439                 radeon_ring_write(ring, data[i]);
 440         }
 441
 442         radeon_ring_unlock_commit(rdev, ring);
 443         kfree(data);
 444         return 0;
 445 }
 446
 447 int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ring_size,
 448                      unsigned rptr_offs, unsigned rptr_reg, unsigned wptr_reg,
 449                      u32 ptr_reg_shift, u32 ptr_reg_mask, u32 nop)
 450 {
 451         int r;
 452
 453         ring->ring_size = ring_size;
 454         ring->rptr_offs = rptr_offs;
 455         ring->rptr_reg = rptr_reg;
 456         ring->wptr_reg = wptr_reg;
 457         ring->ptr_reg_shift = ptr_reg_shift;
 458         ring->ptr_reg_mask = ptr_reg_mask;
 459         ring->nop = nop;
 460         /* Allocate ring buffer */
 461         if (ring->ring_obj == NULL) {
 462                 r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true,
 463                                      RADEON_GEM_DOMAIN_GTT,
 464                                      NULL, &ring->ring_obj);
 465                 if (r) {
 466                         dev_err(rdev->dev, "(%d) ring create failed\n", r);
 467                         return r;
 468                 }
 469                 r = radeon_bo_reserve(ring->ring_obj, false);
 470                 if (unlikely(r != 0))
 471                         return r;
 472                 r = radeon_bo_pin(ring->ring_obj, RADEON_GEM_DOMAIN_GTT,
 473                                         &ring->gpu_addr);
 474                 if (r) {
 475                         radeon_bo_unreserve(ring->ring_obj);
 476                         dev_err(rdev->dev, "(%d) ring pin failed\n", r);
 477                         return r;
 478                 }
 479                 r = radeon_bo_kmap(ring->ring_obj,
 480                                        (void **)&ring->ring);
 481                 radeon_bo_unreserve(ring->ring_obj);
 482                 if (r) {
 483                         dev_err(rdev->dev, "(%d) ring map failed\n", r);
 484                         return r;
 485                 }
 486         }
 487         ring->ptr_mask = (ring->ring_size / 4) - 1;
 488         ring->ring_free_dw = ring->ring_size / 4;
 489         if (radeon_debugfs_ring_init(rdev, ring)) {
 490                 DRM_ERROR("Failed to register debugfs file for rings !\n");
 491         }
 492         return 0;
 493 }
 494
 495 void radeon_ring_fini(struct radeon_device *rdev, struct radeon_ring *ring)
 496 {
 497         int r;
 498         struct radeon_bo *ring_obj;
 499
 500         mutex_lock(&rdev->ring_lock);
 501         ring_obj = ring->ring_obj;
 502         ring->ready = false;
 503         ring->ring = NULL;
 504         ring->ring_obj = NULL;
 505         mutex_unlock(&rdev->ring_lock);
 506
 507         if (ring_obj) {
 508                 r = radeon_bo_reserve(ring_obj, false);
 509                 if (likely(r == 0)) {
 510                         radeon_bo_kunmap(ring_obj);
 511                         radeon_bo_unpin(ring_obj);
 512                         radeon_bo_unreserve(ring_obj);
 513                 }
 514                 radeon_bo_unref(&ring_obj);
 515         }
 516 }
 517
 518 /*
 519  * Debugfs info
 520  */
 521 #if defined(CONFIG_DEBUG_FS)
 522
 523 static int radeon_debugfs_ring_info(struct seq_file *m, void *data)
 524 {
 525         struct drm_info_node *node = (struct drm_info_node *) m->private;
 526         struct drm_device *dev = node->minor->dev;
 527         struct radeon_device *rdev = dev->dev_private;
 528         int ridx = *(int*)node->info_ent->data;
 529         struct radeon_ring *ring = &rdev->ring[ridx];
 530         unsigned count, i, j;
 531
 532         radeon_ring_free_size(rdev, ring);
 533         count = (ring->ring_size / 4) - ring->ring_free_dw;
 534         seq_printf(m, "wptr(0x%04x): 0x%08x\n", ring->wptr_reg, RREG32(ring->wptr_reg));
 535         seq_printf(m, "rptr(0x%04x): 0x%08x\n", ring->rptr_reg, RREG32(ring->rptr_reg));
 536         if (ring->rptr_save_reg) {
 537                 seq_printf(m, "rptr next(0x%04x): 0x%08x\n", ring->rptr_save_reg,
 538                            RREG32(ring->rptr_save_reg));
 539         }
 540         seq_printf(m, "driver's copy of the wptr: 0x%08x\n", ring->wptr);
 541         seq_printf(m, "driver's copy of the rptr: 0x%08x\n", ring->rptr);
 542         seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw);
 543         seq_printf(m, "%u dwords in ring\n", count);
 544         i = ring->rptr;
 545         for (j = 0; j <= count; j++) {
 546                 seq_printf(m, "r[%04d]=0x%08x\n", i, ring->ring[i]);
 547                 i = (i + 1) & ring->ptr_mask;
 548         }
 549         return 0;
 550 }
 551
 552 static int radeon_ring_type_gfx_index = RADEON_RING_TYPE_GFX_INDEX;
 553 static int cayman_ring_type_cp1_index = CAYMAN_RING_TYPE_CP1_INDEX;
 554 static int cayman_ring_type_cp2_index = CAYMAN_RING_TYPE_CP2_INDEX;
 555
 556 static struct drm_info_list radeon_debugfs_ring_info_list[] = {
 557         {"radeon_ring_gfx", radeon_debugfs_ring_info, 0, &radeon_ring_type_gfx_index},
 558         {"radeon_ring_cp1", radeon_debugfs_ring_info, 0, &cayman_ring_type_cp1_index},
 559         {"radeon_ring_cp2", radeon_debugfs_ring_info, 0, &cayman_ring_type_cp2_index},
 560 };
 561
 562 static int radeon_debugfs_sa_info(struct seq_file *m, void *data)
 563 {
 564         struct drm_info_node *node = (struct drm_info_node *) m->private;
 565         struct drm_device *dev = node->minor->dev;
 566         struct radeon_device *rdev = dev->dev_private;
 567
 568         radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m);
 569
 570         return 0;
 571
 572 }
 573
 574 static struct drm_info_list radeon_debugfs_sa_list[] = {
 575         {"radeon_sa_info", &radeon_debugfs_sa_info, 0, NULL},
 576 };
 577
 578 #endif
 579
 580 int radeon_debugfs_ring_init(struct radeon_device *rdev, struct radeon_ring *ring)
 581 {
 582 #if defined(CONFIG_DEBUG_FS)
 583         unsigned i;
 584         for (i = 0; i < ARRAY_SIZE(radeon_debugfs_ring_info_list); ++i) {
 585                 struct drm_info_list *info = &radeon_debugfs_ring_info_list[i];
 586                 int ridx = *(int*)radeon_debugfs_ring_info_list[i].data;
 587                 unsigned r;
 588
 589                 if (&rdev->ring[ridx] != ring)
 590                         continue;
 591
 592                 r = radeon_debugfs_add_files(rdev, info, 1);
 593                 if (r)
 594                         return r;
 595         }
 596 #endif
 597         return 0;
 598 }
 599
 600 int radeon_debugfs_sa_init(struct radeon_device *rdev)
 601 {
 602 #if defined(CONFIG_DEBUG_FS)
 603         return radeon_debugfs_add_files(rdev, radeon_debugfs_sa_list, 1);
 604 #else
 605         return 0;
 606 #endif
 607 }