drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c

   1 /*
   2  * Copyright 2014 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  */
  25
  26 #include "amdgpu.h"
  27 #include "amdgpu_gfx.h"
  28 #include "amdgpu_rlc.h"
  29 #include "amdgpu_ras.h"
  30
  31 /* delay 0.1 second to enable gfx off feature */
  32 #define GFX_OFF_DELAY_ENABLE         msecs_to_jiffies(100)
  33
  34 /*
  35  * GPU GFX IP block helpers function.
  36  */
  37
  38 int amdgpu_gfx_mec_queue_to_bit(struct amdgpu_device *adev, int mec,
  39                                 int pipe, int queue)
  40 {
  41         int bit = 0;
  42
  43         bit += mec * adev->gfx.mec.num_pipe_per_mec
  44                 * adev->gfx.mec.num_queue_per_pipe;
  45         bit += pipe * adev->gfx.mec.num_queue_per_pipe;
  46         bit += queue;
  47
  48         return bit;
  49 }
  50
  51 void amdgpu_gfx_bit_to_mec_queue(struct amdgpu_device *adev, int bit,
  52                                  int *mec, int *pipe, int *queue)
  53 {
  54         *queue = bit % adev->gfx.mec.num_queue_per_pipe;
  55         *pipe = (bit / adev->gfx.mec.num_queue_per_pipe)
  56                 % adev->gfx.mec.num_pipe_per_mec;
  57         *mec = (bit / adev->gfx.mec.num_queue_per_pipe)
  58                / adev->gfx.mec.num_pipe_per_mec;
  59
  60 }
  61
  62 bool amdgpu_gfx_is_mec_queue_enabled(struct amdgpu_device *adev,
  63                                      int mec, int pipe, int queue)
  64 {
  65         return test_bit(amdgpu_gfx_mec_queue_to_bit(adev, mec, pipe, queue),
  66                         adev->gfx.mec.queue_bitmap);
  67 }
  68
  69 int amdgpu_gfx_me_queue_to_bit(struct amdgpu_device *adev,
  70                                int me, int pipe, int queue)
  71 {
  72         int bit = 0;
  73
  74         bit += me * adev->gfx.me.num_pipe_per_me
  75                 * adev->gfx.me.num_queue_per_pipe;
  76         bit += pipe * adev->gfx.me.num_queue_per_pipe;
  77         bit += queue;
  78
  79         return bit;
  80 }
  81
  82 void amdgpu_gfx_bit_to_me_queue(struct amdgpu_device *adev, int bit,
  83                                 int *me, int *pipe, int *queue)
  84 {
  85         *queue = bit % adev->gfx.me.num_queue_per_pipe;
  86         *pipe = (bit / adev->gfx.me.num_queue_per_pipe)
  87                 % adev->gfx.me.num_pipe_per_me;
  88         *me = (bit / adev->gfx.me.num_queue_per_pipe)
  89                 / adev->gfx.me.num_pipe_per_me;
  90 }
  91
  92 bool amdgpu_gfx_is_me_queue_enabled(struct amdgpu_device *adev,
  93                                     int me, int pipe, int queue)
  94 {
  95         return test_bit(amdgpu_gfx_me_queue_to_bit(adev, me, pipe, queue),
  96                         adev->gfx.me.queue_bitmap);
  97 }
  98
  99 /**
 100  * amdgpu_gfx_scratch_get - Allocate a scratch register
 101  *
 102  * @adev: amdgpu_device pointer
 103  * @reg: scratch register mmio offset
 104  *
 105  * Allocate a CP scratch register for use by the driver (all asics).
 106  * Returns 0 on success or -EINVAL on failure.
 107  */
 108 int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg)
 109 {
 110         int i;
 111
 112         i = ffs(adev->gfx.scratch.free_mask);
 113         if (i != 0 && i <= adev->gfx.scratch.num_reg) {
 114                 i--;
 115                 adev->gfx.scratch.free_mask &= ~(1u << i);
 116                 *reg = adev->gfx.scratch.reg_base + i;
 117                 return 0;
 118         }
 119         return -EINVAL;
 120 }
 121
 122 /**
 123  * amdgpu_gfx_scratch_free - Free a scratch register
 124  *
 125  * @adev: amdgpu_device pointer
 126  * @reg: scratch register mmio offset
 127  *
 128  * Free a CP scratch register allocated for use by the driver (all asics)
 129  */
 130 void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg)
 131 {
 132         adev->gfx.scratch.free_mask |= 1u << (reg - adev->gfx.scratch.reg_base);
 133 }
 134
 135 /**
 136  * amdgpu_gfx_parse_disable_cu - Parse the disable_cu module parameter
 137  *
 138  * @mask: array in which the per-shader array disable masks will be stored
 139  * @max_se: number of SEs
 140  * @max_sh: number of SHs
 141  *
 142  * The bitmask of CUs to be disabled in the shader array determined by se and
 143  * sh is stored in mask[se * max_sh + sh].
 144  */
 145 void amdgpu_gfx_parse_disable_cu(unsigned *mask, unsigned max_se, unsigned max_sh)
 146 {
 147         unsigned se, sh, cu;
 148         const char *p;
 149
 150         memset(mask, 0, sizeof(*mask) * max_se * max_sh);
 151
 152         if (!amdgpu_disable_cu || !*amdgpu_disable_cu)
 153                 return;
 154
 155         p = amdgpu_disable_cu;
 156         for (;;) {
 157                 char *next;
 158                 int ret = sscanf(p, "%u.%u.%u", &se, &sh, &cu);
 159                 if (ret < 3) {
 160                         DRM_ERROR("amdgpu: could not parse disable_cu\n");
 161                         return;
 162                 }
 163
 164                 if (se < max_se && sh < max_sh && cu < 16) {
 165                         DRM_INFO("amdgpu: disabling CU %u.%u.%u\n", se, sh, cu);
 166                         mask[se * max_sh + sh] |= 1u << cu;
 167                 } else {
 168                         DRM_ERROR("amdgpu: disable_cu %u.%u.%u is out of range\n",
 169                                   se, sh, cu);
 170                 }
 171
 172                 next = strchr(p, ',');
 173                 if (!next)
 174                         break;
 175                 p = next + 1;
 176         }
 177 }
 178
 179 static bool amdgpu_gfx_is_multipipe_capable(struct amdgpu_device *adev)
 180 {
 181         if (amdgpu_compute_multipipe != -1) {
 182                 DRM_INFO("amdgpu: forcing compute pipe policy %d\n",
 183                          amdgpu_compute_multipipe);
 184                 return amdgpu_compute_multipipe == 1;
 185         }
 186
 187         /* FIXME: spreading the queues across pipes causes perf regressions
 188          * on POLARIS11 compute workloads */
 189         if (adev->asic_type == CHIP_POLARIS11)
 190                 return false;
 191
 192         return adev->gfx.mec.num_mec > 1;
 193 }
 194
 195 bool amdgpu_gfx_is_high_priority_compute_queue(struct amdgpu_device *adev,
 196                                                int queue)
 197 {
 198         /* Policy: make queue 0 of each pipe as high priority compute queue */
 199         return (queue == 0);
 200
 201 }
 202
 203 void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
 204 {
 205         int i, queue, pipe, mec;
 206         bool multipipe_policy = amdgpu_gfx_is_multipipe_capable(adev);
 207
 208         /* policy for amdgpu compute queue ownership */
 209         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
 210                 queue = i % adev->gfx.mec.num_queue_per_pipe;
 211                 pipe = (i / adev->gfx.mec.num_queue_per_pipe)
 212                         % adev->gfx.mec.num_pipe_per_mec;
 213                 mec = (i / adev->gfx.mec.num_queue_per_pipe)
 214                         / adev->gfx.mec.num_pipe_per_mec;
 215
 216                 /* we've run out of HW */
 217                 if (mec >= adev->gfx.mec.num_mec)
 218                         break;
 219
 220                 if (multipipe_policy) {
 221                         /* policy: amdgpu owns the first two queues of the first MEC */
 222                         if (mec == 0 && queue < 2)
 223                                 set_bit(i, adev->gfx.mec.queue_bitmap);
 224                 } else {
 225                         /* policy: amdgpu owns all queues in the first pipe */
 226                         if (mec == 0 && pipe == 0)
 227                                 set_bit(i, adev->gfx.mec.queue_bitmap);
 228                 }
 229         }
 230
 231         /* update the number of active compute rings */
 232         adev->gfx.num_compute_rings =
 233                 bitmap_weight(adev->gfx.mec.queue_bitmap, AMDGPU_MAX_COMPUTE_QUEUES);
 234
 235         /* If you hit this case and edited the policy, you probably just
 236          * need to increase AMDGPU_MAX_COMPUTE_RINGS */
 237         if (WARN_ON(adev->gfx.num_compute_rings > AMDGPU_MAX_COMPUTE_RINGS))
 238                 adev->gfx.num_compute_rings = AMDGPU_MAX_COMPUTE_RINGS;
 239 }
 240
 241 void amdgpu_gfx_graphics_queue_acquire(struct amdgpu_device *adev)
 242 {
 243         int i, queue, me;
 244
 245         for (i = 0; i < AMDGPU_MAX_GFX_QUEUES; ++i) {
 246                 queue = i % adev->gfx.me.num_queue_per_pipe;
 247                 me = (i / adev->gfx.me.num_queue_per_pipe)
 248                       / adev->gfx.me.num_pipe_per_me;
 249
 250                 if (me >= adev->gfx.me.num_me)
 251                         break;
 252                 /* policy: amdgpu owns the first queue per pipe at this stage
 253                  * will extend to mulitple queues per pipe later */
 254                 if (me == 0 && queue < 1)
 255                         set_bit(i, adev->gfx.me.queue_bitmap);
 256         }
 257
 258         /* update the number of active graphics rings */
 259         adev->gfx.num_gfx_rings =
 260                 bitmap_weight(adev->gfx.me.queue_bitmap, AMDGPU_MAX_GFX_QUEUES);
 261 }
 262
 263 static int amdgpu_gfx_kiq_acquire(struct amdgpu_device *adev,
 264                                   struct amdgpu_ring *ring)
 265 {
 266         int queue_bit;
 267         int mec, pipe, queue;
 268
 269         queue_bit = adev->gfx.mec.num_mec
 270                     * adev->gfx.mec.num_pipe_per_mec
 271                     * adev->gfx.mec.num_queue_per_pipe;
 272
 273         while (queue_bit-- >= 0) {
 274                 if (test_bit(queue_bit, adev->gfx.mec.queue_bitmap))
 275                         continue;
 276
 277                 amdgpu_gfx_bit_to_mec_queue(adev, queue_bit, &mec, &pipe, &queue);
 278
 279                 /*
 280                  * 1. Using pipes 2/3 from MEC 2 seems cause problems.
 281                  * 2. It must use queue id 0, because CGPG_IDLE/SAVE/LOAD/RUN
 282                  * only can be issued on queue 0.
 283                  */
 284                 if ((mec == 1 && pipe > 1) || queue != 0)
 285                         continue;
 286
 287                 ring->me = mec + 1;
 288                 ring->pipe = pipe;
 289                 ring->queue = queue;
 290
 291                 return 0;
 292         }
 293
 294         dev_err(adev->dev, "Failed to find a queue for KIQ\n");
 295         return -EINVAL;
 296 }
 297
 298 int amdgpu_gfx_kiq_init_ring(struct amdgpu_device *adev,
 299                              struct amdgpu_ring *ring,
 300                              struct amdgpu_irq_src *irq)
 301 {
 302         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 303         int r = 0;
 304
 305         spin_lock_init(&kiq->ring_lock);
 306
 307         ring->adev = NULL;
 308         ring->ring_obj = NULL;
 309         ring->use_doorbell = true;
 310         ring->doorbell_index = adev->doorbell_index.kiq;
 311
 312         r = amdgpu_gfx_kiq_acquire(adev, ring);
 313         if (r)
 314                 return r;
 315
 316         ring->eop_gpu_addr = kiq->eop_gpu_addr;
 317         ring->no_scheduler = true;
 318         sprintf(ring->name, "kiq_%d.%d.%d", ring->me, ring->pipe, ring->queue);
 319         r = amdgpu_ring_init(adev, ring, 1024,
 320                              irq, AMDGPU_CP_KIQ_IRQ_DRIVER0,
 321                              AMDGPU_RING_PRIO_DEFAULT);
 322         if (r)
 323                 dev_warn(adev->dev, "(%d) failed to init kiq ring\n", r);
 324
 325         return r;
 326 }
 327
 328 void amdgpu_gfx_kiq_free_ring(struct amdgpu_ring *ring)
 329 {
 330         amdgpu_ring_fini(ring);
 331 }
 332
 333 void amdgpu_gfx_kiq_fini(struct amdgpu_device *adev)
 334 {
 335         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 336
 337         amdgpu_bo_free_kernel(&kiq->eop_obj, &kiq->eop_gpu_addr, NULL);
 338 }
 339
 340 int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
 341                         unsigned hpd_size)
 342 {
 343         int r;
 344         u32 *hpd;
 345         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 346
 347         r = amdgpu_bo_create_kernel(adev, hpd_size, PAGE_SIZE,
 348                                     AMDGPU_GEM_DOMAIN_GTT, &kiq->eop_obj,
 349                                     &kiq->eop_gpu_addr, (void **)&hpd);
 350         if (r) {
 351                 dev_warn(adev->dev, "failed to create KIQ bo (%d).\n", r);
 352                 return r;
 353         }
 354
 355         memset(hpd, 0, hpd_size);
 356
 357         r = amdgpu_bo_reserve(kiq->eop_obj, true);
 358         if (unlikely(r != 0))
 359                 dev_warn(adev->dev, "(%d) reserve kiq eop bo failed\n", r);
 360         amdgpu_bo_kunmap(kiq->eop_obj);
 361         amdgpu_bo_unreserve(kiq->eop_obj);
 362
 363         return 0;
 364 }
 365
 366 /* create MQD for each compute/gfx queue */
 367 int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
 368                            unsigned mqd_size)
 369 {
 370         struct amdgpu_ring *ring = NULL;
 371         int r, i;
 372
 373         /* create MQD for KIQ */
 374         ring = &adev->gfx.kiq.ring;
 375         if (!ring->mqd_obj) {
 376                 /* originaly the KIQ MQD is put in GTT domain, but for SRIOV VRAM domain is a must
 377                  * otherwise hypervisor trigger SAVE_VF fail after driver unloaded which mean MQD
 378                  * deallocated and gart_unbind, to strict diverage we decide to use VRAM domain for
 379                  * KIQ MQD no matter SRIOV or Bare-metal
 380                  */
 381                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 382                                             AMDGPU_GEM_DOMAIN_VRAM, &ring->mqd_obj,
 383                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 384                 if (r) {
 385                         dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
 386                         return r;
 387                 }
 388
 389                 /* prepare MQD backup */
 390                 adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS] = kmalloc(mqd_size, GFP_KERNEL);
 391                 if (!adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS])
 392                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 393         }
 394
 395         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 396                 /* create MQD for each KGQ */
 397                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 398                         ring = &adev->gfx.gfx_ring[i];
 399                         if (!ring->mqd_obj) {
 400                                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 401                                                             AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 402                                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 403                                 if (r) {
 404                                         dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 405                                         return r;
 406                                 }
 407
 408                                 /* prepare MQD backup */
 409                                 adev->gfx.me.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 410                                 if (!adev->gfx.me.mqd_backup[i])
 411                                         dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 412                         }
 413                 }
 414         }
 415
 416         /* create MQD for each KCQ */
 417         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 418                 ring = &adev->gfx.compute_ring[i];
 419                 if (!ring->mqd_obj) {
 420                         r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 421                                                     AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 422                                                     &ring->mqd_gpu_addr, &ring->mqd_ptr);
 423                         if (r) {
 424                                 dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 425                                 return r;
 426                         }
 427
 428                         /* prepare MQD backup */
 429                         adev->gfx.mec.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 430                         if (!adev->gfx.mec.mqd_backup[i])
 431                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 432                 }
 433         }
 434
 435         return 0;
 436 }
 437
 438 void amdgpu_gfx_mqd_sw_fini(struct amdgpu_device *adev)
 439 {
 440         struct amdgpu_ring *ring = NULL;
 441         int i;
 442
 443         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 444                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 445                         ring = &adev->gfx.gfx_ring[i];
 446                         kfree(adev->gfx.me.mqd_backup[i]);
 447                         amdgpu_bo_free_kernel(&ring->mqd_obj,
 448                                               &ring->mqd_gpu_addr,
 449                                               &ring->mqd_ptr);
 450                 }
 451         }
 452
 453         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 454                 ring = &adev->gfx.compute_ring[i];
 455                 kfree(adev->gfx.mec.mqd_backup[i]);
 456                 amdgpu_bo_free_kernel(&ring->mqd_obj,
 457                                       &ring->mqd_gpu_addr,
 458                                       &ring->mqd_ptr);
 459         }
 460
 461         ring = &adev->gfx.kiq.ring;
 462         kfree(adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS]);
 463         amdgpu_bo_free_kernel(&ring->mqd_obj,
 464                               &ring->mqd_gpu_addr,
 465                               &ring->mqd_ptr);
 466 }
 467
 468 int amdgpu_gfx_disable_kcq(struct amdgpu_device *adev)
 469 {
 470         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 471         struct amdgpu_ring *kiq_ring = &kiq->ring;
 472         int i;
 473
 474         if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
 475                 return -EINVAL;
 476
 477         if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size *
 478                                         adev->gfx.num_compute_rings))
 479                 return -ENOMEM;
 480
 481         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 482                 kiq->pmf->kiq_unmap_queues(kiq_ring, &adev->gfx.compute_ring[i],
 483                                            RESET_QUEUES, 0, 0);
 484
 485         return amdgpu_ring_test_helper(kiq_ring);
 486 }
 487
 488 int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev)
 489 {
 490         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 491         struct amdgpu_ring *kiq_ring = &adev->gfx.kiq.ring;
 492         uint64_t queue_mask = 0;
 493         int r, i;
 494
 495         if (!kiq->pmf || !kiq->pmf->kiq_map_queues || !kiq->pmf->kiq_set_resources)
 496                 return -EINVAL;
 497
 498         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
 499                 if (!test_bit(i, adev->gfx.mec.queue_bitmap))
 500                         continue;
 501
 502                 /* This situation may be hit in the future if a new HW
 503                  * generation exposes more than 64 queues. If so, the
 504                  * definition of queue_mask needs updating */
 505                 if (WARN_ON(i > (sizeof(queue_mask)*8))) {
 506                         DRM_ERROR("Invalid KCQ enabled: %d\n", i);
 507                         break;
 508                 }
 509
 510                 queue_mask |= (1ull << i);
 511         }
 512
 513         DRM_INFO("kiq ring mec %d pipe %d q %d\n", kiq_ring->me, kiq_ring->pipe,
 514                                                         kiq_ring->queue);
 515
 516         r = amdgpu_ring_alloc(kiq_ring, kiq->pmf->map_queues_size *
 517                                         adev->gfx.num_compute_rings +
 518                                         kiq->pmf->set_resources_size);
 519         if (r) {
 520                 DRM_ERROR("Failed to lock KIQ (%d).\n", r);
 521                 return r;
 522         }
 523
 524         kiq->pmf->kiq_set_resources(kiq_ring, queue_mask);
 525         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 526                 kiq->pmf->kiq_map_queues(kiq_ring, &adev->gfx.compute_ring[i]);
 527
 528         r = amdgpu_ring_test_helper(kiq_ring);
 529         if (r)
 530                 DRM_ERROR("KCQ enable failed\n");
 531
 532         return r;
 533 }
 534
 535 /* amdgpu_gfx_off_ctrl - Handle gfx off feature enable/disable
 536  *
 537  * @adev: amdgpu_device pointer
 538  * @bool enable true: enable gfx off feature, false: disable gfx off feature
 539  *
 540  * 1. gfx off feature will be enabled by gfx ip after gfx cg gp enabled.
 541  * 2. other client can send request to disable gfx off feature, the request should be honored.
 542  * 3. other client can cancel their request of disable gfx off feature
 543  * 4. other client should not send request to enable gfx off feature before disable gfx off feature.
 544  */
 545
 546 void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 547 {
 548         if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
 549                 return;
 550
 551         mutex_lock(&adev->gfx.gfx_off_mutex);
 552
 553         if (!enable)
 554                 adev->gfx.gfx_off_req_count++;
 555         else if (adev->gfx.gfx_off_req_count > 0)
 556                 adev->gfx.gfx_off_req_count--;
 557
 558         if (enable && !adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) {
 559                 schedule_delayed_work(&adev->gfx.gfx_off_delay_work, GFX_OFF_DELAY_ENABLE);
 560         } else if (!enable && adev->gfx.gfx_off_state) {
 561                 if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, false))
 562                         adev->gfx.gfx_off_state = false;
 563         }
 564
 565         mutex_unlock(&adev->gfx.gfx_off_mutex);
 566 }
 567
 568 int amdgpu_gfx_ras_late_init(struct amdgpu_device *adev)
 569 {
 570         int r;
 571         struct ras_fs_if fs_info = {
 572                 .sysfs_name = "gfx_err_count",
 573         };
 574         struct ras_ih_if ih_info = {
 575                 .cb = amdgpu_gfx_process_ras_data_cb,
 576         };
 577
 578         if (!adev->gfx.ras_if) {
 579                 adev->gfx.ras_if = kmalloc(sizeof(struct ras_common_if), GFP_KERNEL);
 580                 if (!adev->gfx.ras_if)
 581                         return -ENOMEM;
 582                 adev->gfx.ras_if->block = AMDGPU_RAS_BLOCK__GFX;
 583                 adev->gfx.ras_if->type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
 584                 adev->gfx.ras_if->sub_block_index = 0;
 585                 strcpy(adev->gfx.ras_if->name, "gfx");
 586         }
 587         fs_info.head = ih_info.head = *adev->gfx.ras_if;
 588
 589         r = amdgpu_ras_late_init(adev, adev->gfx.ras_if,
 590                                  &fs_info, &ih_info);
 591         if (r)
 592                 goto free;
 593
 594         if (amdgpu_ras_is_supported(adev, adev->gfx.ras_if->block)) {
 595                 r = amdgpu_irq_get(adev, &adev->gfx.cp_ecc_error_irq, 0);
 596                 if (r)
 597                         goto late_fini;
 598         } else {
 599                 /* free gfx ras_if if ras is not supported */
 600                 r = 0;
 601                 goto free;
 602         }
 603
 604         return 0;
 605 late_fini:
 606         amdgpu_ras_late_fini(adev, adev->gfx.ras_if, &ih_info);
 607 free:
 608         kfree(adev->gfx.ras_if);
 609         adev->gfx.ras_if = NULL;
 610         return r;
 611 }
 612
 613 void amdgpu_gfx_ras_fini(struct amdgpu_device *adev)
 614 {
 615         if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__GFX) &&
 616                         adev->gfx.ras_if) {
 617                 struct ras_common_if *ras_if = adev->gfx.ras_if;
 618                 struct ras_ih_if ih_info = {
 619                         .head = *ras_if,
 620                         .cb = amdgpu_gfx_process_ras_data_cb,
 621                 };
 622
 623                 amdgpu_ras_late_fini(adev, ras_if, &ih_info);
 624                 kfree(ras_if);
 625         }
 626 }
 627
 628 int amdgpu_gfx_process_ras_data_cb(struct amdgpu_device *adev,
 629                 void *err_data,
 630                 struct amdgpu_iv_entry *entry)
 631 {
 632         /* TODO ue will trigger an interrupt.
 633          *
 634          * When “Full RAS” is enabled, the per-IP interrupt sources should
 635          * be disabled and the driver should only look for the aggregated
 636          * interrupt via sync flood
 637          */
 638         if (!amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__GFX)) {
 639                 kgd2kfd_set_sram_ecc_flag(adev->kfd.dev);
 640                 if (adev->gfx.funcs->query_ras_error_count)
 641                         adev->gfx.funcs->query_ras_error_count(adev, err_data);
 642                 amdgpu_ras_reset_gpu(adev);
 643         }
 644         return AMDGPU_RAS_SUCCESS;
 645 }
 646
 647 int amdgpu_gfx_cp_ecc_error_irq(struct amdgpu_device *adev,
 648                                   struct amdgpu_irq_src *source,
 649                                   struct amdgpu_iv_entry *entry)
 650 {
 651         struct ras_common_if *ras_if = adev->gfx.ras_if;
 652         struct ras_dispatch_if ih_data = {
 653                 .entry = entry,
 654         };
 655
 656         if (!ras_if)
 657                 return 0;
 658
 659         ih_data.head = *ras_if;
 660
 661         DRM_ERROR("CP ECC ERROR IRQ\n");
 662         amdgpu_ras_interrupt_dispatch(adev, &ih_data);
 663         return 0;
 664 }
 665
 666 uint32_t amdgpu_kiq_rreg(struct amdgpu_device *adev, uint32_t reg)
 667 {
 668         signed long r, cnt = 0;
 669         unsigned long flags;
 670         uint32_t seq, reg_val_offs = 0, value = 0;
 671         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 672         struct amdgpu_ring *ring = &kiq->ring;
 673
 674         BUG_ON(!ring->funcs->emit_rreg);
 675
 676         spin_lock_irqsave(&kiq->ring_lock, flags);
 677         if (amdgpu_device_wb_get(adev, &reg_val_offs)) {
 678                 spin_unlock_irqrestore(&kiq->ring_lock, flags);
 679                 pr_err("critical bug! too many kiq readers\n");
 680                 goto failed_kiq_read;
 681         }
 682         amdgpu_ring_alloc(ring, 32);
 683         amdgpu_ring_emit_rreg(ring, reg, reg_val_offs);
 684         amdgpu_fence_emit_polling(ring, &seq);
 685         amdgpu_ring_commit(ring);
 686         spin_unlock_irqrestore(&kiq->ring_lock, flags);
 687
 688         r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 689
 690         /* don't wait anymore for gpu reset case because this way may
 691          * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
 692          * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
 693          * never return if we keep waiting in virt_kiq_rreg, which cause
 694          * gpu_recover() hang there.
 695          *
 696          * also don't wait anymore for IRQ context
 697          * */
 698         if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 699                 goto failed_kiq_read;
 700
 701         might_sleep();
 702         while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
 703                 msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 704                 r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 705         }
 706
 707         if (cnt > MAX_KIQ_REG_TRY)
 708                 goto failed_kiq_read;
 709
 710         mb();
 711         value = adev->wb.wb[reg_val_offs];
 712         amdgpu_device_wb_free(adev, reg_val_offs);
 713         return value;
 714
 715 failed_kiq_read:
 716         pr_err("failed to read reg:%x\n", reg);
 717         return ~0;
 718 }
 719
 720 void amdgpu_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v)
 721 {
 722         signed long r, cnt = 0;
 723         unsigned long flags;
 724         uint32_t seq;
 725         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 726         struct amdgpu_ring *ring = &kiq->ring;
 727
 728         BUG_ON(!ring->funcs->emit_wreg);
 729
 730         spin_lock_irqsave(&kiq->ring_lock, flags);
 731         amdgpu_ring_alloc(ring, 32);
 732         amdgpu_ring_emit_wreg(ring, reg, v);
 733         amdgpu_fence_emit_polling(ring, &seq);
 734         amdgpu_ring_commit(ring);
 735         spin_unlock_irqrestore(&kiq->ring_lock, flags);
 736
 737         r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 738
 739         /* don't wait anymore for gpu reset case because this way may
 740          * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
 741          * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
 742          * never return if we keep waiting in virt_kiq_rreg, which cause
 743          * gpu_recover() hang there.
 744          *
 745          * also don't wait anymore for IRQ context
 746          * */
 747         if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 748                 goto failed_kiq_write;
 749
 750         might_sleep();
 751         while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
 752
 753                 msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 754                 r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 755         }
 756
 757         if (cnt > MAX_KIQ_REG_TRY)
 758                 goto failed_kiq_write;
 759
 760         return;
 761
 762 failed_kiq_write:
 763         pr_err("failed to write reg:%x\n", reg);
 764 }