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 void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
 196 {
 197         int i, queue, pipe, mec;
 198         bool multipipe_policy = amdgpu_gfx_is_multipipe_capable(adev);
 199
 200         /* policy for amdgpu compute queue ownership */
 201         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
 202                 queue = i % adev->gfx.mec.num_queue_per_pipe;
 203                 pipe = (i / adev->gfx.mec.num_queue_per_pipe)
 204                         % adev->gfx.mec.num_pipe_per_mec;
 205                 mec = (i / adev->gfx.mec.num_queue_per_pipe)
 206                         / adev->gfx.mec.num_pipe_per_mec;
 207
 208                 /* we've run out of HW */
 209                 if (mec >= adev->gfx.mec.num_mec)
 210                         break;
 211
 212                 if (multipipe_policy) {
 213                         /* policy: amdgpu owns the first two queues of the first MEC */
 214                         if (mec == 0 && queue < 2)
 215                                 set_bit(i, adev->gfx.mec.queue_bitmap);
 216                 } else {
 217                         /* policy: amdgpu owns all queues in the first pipe */
 218                         if (mec == 0 && pipe == 0)
 219                                 set_bit(i, adev->gfx.mec.queue_bitmap);
 220                 }
 221         }
 222
 223         /* update the number of active compute rings */
 224         adev->gfx.num_compute_rings =
 225                 bitmap_weight(adev->gfx.mec.queue_bitmap, AMDGPU_MAX_COMPUTE_QUEUES);
 226
 227         /* If you hit this case and edited the policy, you probably just
 228          * need to increase AMDGPU_MAX_COMPUTE_RINGS */
 229         if (WARN_ON(adev->gfx.num_compute_rings > AMDGPU_MAX_COMPUTE_RINGS))
 230                 adev->gfx.num_compute_rings = AMDGPU_MAX_COMPUTE_RINGS;
 231 }
 232
 233 void amdgpu_gfx_graphics_queue_acquire(struct amdgpu_device *adev)
 234 {
 235         int i, queue, me;
 236
 237         for (i = 0; i < AMDGPU_MAX_GFX_QUEUES; ++i) {
 238                 queue = i % adev->gfx.me.num_queue_per_pipe;
 239                 me = (i / adev->gfx.me.num_queue_per_pipe)
 240                       / adev->gfx.me.num_pipe_per_me;
 241
 242                 if (me >= adev->gfx.me.num_me)
 243                         break;
 244                 /* policy: amdgpu owns the first queue per pipe at this stage
 245                  * will extend to mulitple queues per pipe later */
 246                 if (me == 0 && queue < 1)
 247                         set_bit(i, adev->gfx.me.queue_bitmap);
 248         }
 249
 250         /* update the number of active graphics rings */
 251         adev->gfx.num_gfx_rings =
 252                 bitmap_weight(adev->gfx.me.queue_bitmap, AMDGPU_MAX_GFX_QUEUES);
 253 }
 254
 255 static int amdgpu_gfx_kiq_acquire(struct amdgpu_device *adev,
 256                                   struct amdgpu_ring *ring)
 257 {
 258         int queue_bit;
 259         int mec, pipe, queue;
 260
 261         queue_bit = adev->gfx.mec.num_mec
 262                     * adev->gfx.mec.num_pipe_per_mec
 263                     * adev->gfx.mec.num_queue_per_pipe;
 264
 265         while (queue_bit-- >= 0) {
 266                 if (test_bit(queue_bit, adev->gfx.mec.queue_bitmap))
 267                         continue;
 268
 269                 amdgpu_gfx_bit_to_mec_queue(adev, queue_bit, &mec, &pipe, &queue);
 270
 271                 /*
 272                  * 1. Using pipes 2/3 from MEC 2 seems cause problems.
 273                  * 2. It must use queue id 0, because CGPG_IDLE/SAVE/LOAD/RUN
 274                  * only can be issued on queue 0.
 275                  */
 276                 if ((mec == 1 && pipe > 1) || queue != 0)
 277                         continue;
 278
 279                 ring->me = mec + 1;
 280                 ring->pipe = pipe;
 281                 ring->queue = queue;
 282
 283                 return 0;
 284         }
 285
 286         dev_err(adev->dev, "Failed to find a queue for KIQ\n");
 287         return -EINVAL;
 288 }
 289
 290 int amdgpu_gfx_kiq_init_ring(struct amdgpu_device *adev,
 291                              struct amdgpu_ring *ring,
 292                              struct amdgpu_irq_src *irq)
 293 {
 294         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 295         int r = 0;
 296
 297         spin_lock_init(&kiq->ring_lock);
 298
 299         r = amdgpu_device_wb_get(adev, &kiq->reg_val_offs);
 300         if (r)
 301                 return r;
 302
 303         ring->adev = NULL;
 304         ring->ring_obj = NULL;
 305         ring->use_doorbell = true;
 306         ring->doorbell_index = adev->doorbell_index.kiq;
 307
 308         r = amdgpu_gfx_kiq_acquire(adev, ring);
 309         if (r)
 310                 return r;
 311
 312         ring->eop_gpu_addr = kiq->eop_gpu_addr;
 313         sprintf(ring->name, "kiq_%d.%d.%d", ring->me, ring->pipe, ring->queue);
 314         r = amdgpu_ring_init(adev, ring, 1024,
 315                              irq, AMDGPU_CP_KIQ_IRQ_DRIVER0);
 316         if (r)
 317                 dev_warn(adev->dev, "(%d) failed to init kiq ring\n", r);
 318
 319         return r;
 320 }
 321
 322 void amdgpu_gfx_kiq_free_ring(struct amdgpu_ring *ring)
 323 {
 324         amdgpu_device_wb_free(ring->adev, ring->adev->gfx.kiq.reg_val_offs);
 325         amdgpu_ring_fini(ring);
 326 }
 327
 328 void amdgpu_gfx_kiq_fini(struct amdgpu_device *adev)
 329 {
 330         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 331
 332         amdgpu_bo_free_kernel(&kiq->eop_obj, &kiq->eop_gpu_addr, NULL);
 333 }
 334
 335 int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
 336                         unsigned hpd_size)
 337 {
 338         int r;
 339         u32 *hpd;
 340         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 341
 342         r = amdgpu_bo_create_kernel(adev, hpd_size, PAGE_SIZE,
 343                                     AMDGPU_GEM_DOMAIN_GTT, &kiq->eop_obj,
 344                                     &kiq->eop_gpu_addr, (void **)&hpd);
 345         if (r) {
 346                 dev_warn(adev->dev, "failed to create KIQ bo (%d).\n", r);
 347                 return r;
 348         }
 349
 350         memset(hpd, 0, hpd_size);
 351
 352         r = amdgpu_bo_reserve(kiq->eop_obj, true);
 353         if (unlikely(r != 0))
 354                 dev_warn(adev->dev, "(%d) reserve kiq eop bo failed\n", r);
 355         amdgpu_bo_kunmap(kiq->eop_obj);
 356         amdgpu_bo_unreserve(kiq->eop_obj);
 357
 358         return 0;
 359 }
 360
 361 /* create MQD for each compute/gfx queue */
 362 int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
 363                            unsigned mqd_size)
 364 {
 365         struct amdgpu_ring *ring = NULL;
 366         int r, i;
 367
 368         /* create MQD for KIQ */
 369         ring = &adev->gfx.kiq.ring;
 370         if (!ring->mqd_obj) {
 371                 /* originaly the KIQ MQD is put in GTT domain, but for SRIOV VRAM domain is a must
 372                  * otherwise hypervisor trigger SAVE_VF fail after driver unloaded which mean MQD
 373                  * deallocated and gart_unbind, to strict diverage we decide to use VRAM domain for
 374                  * KIQ MQD no matter SRIOV or Bare-metal
 375                  */
 376                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 377                                             AMDGPU_GEM_DOMAIN_VRAM, &ring->mqd_obj,
 378                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 379                 if (r) {
 380                         dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
 381                         return r;
 382                 }
 383
 384                 /* prepare MQD backup */
 385                 adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS] = kmalloc(mqd_size, GFP_KERNEL);
 386                 if (!adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS])
 387                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 388         }
 389
 390         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 391                 /* create MQD for each KGQ */
 392                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 393                         ring = &adev->gfx.gfx_ring[i];
 394                         if (!ring->mqd_obj) {
 395                                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 396                                                             AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 397                                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 398                                 if (r) {
 399                                         dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 400                                         return r;
 401                                 }
 402
 403                                 /* prepare MQD backup */
 404                                 adev->gfx.me.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 405                                 if (!adev->gfx.me.mqd_backup[i])
 406                                         dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 407                         }
 408                 }
 409         }
 410
 411         /* create MQD for each KCQ */
 412         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 413                 ring = &adev->gfx.compute_ring[i];
 414                 if (!ring->mqd_obj) {
 415                         r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 416                                                     AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 417                                                     &ring->mqd_gpu_addr, &ring->mqd_ptr);
 418                         if (r) {
 419                                 dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 420                                 return r;
 421                         }
 422
 423                         /* prepare MQD backup */
 424                         adev->gfx.mec.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 425                         if (!adev->gfx.mec.mqd_backup[i])
 426                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 427                 }
 428         }
 429
 430         return 0;
 431 }
 432
 433 void amdgpu_gfx_mqd_sw_fini(struct amdgpu_device *adev)
 434 {
 435         struct amdgpu_ring *ring = NULL;
 436         int i;
 437
 438         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 439                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 440                         ring = &adev->gfx.gfx_ring[i];
 441                         kfree(adev->gfx.me.mqd_backup[i]);
 442                         amdgpu_bo_free_kernel(&ring->mqd_obj,
 443                                               &ring->mqd_gpu_addr,
 444                                               &ring->mqd_ptr);
 445                 }
 446         }
 447
 448         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 449                 ring = &adev->gfx.compute_ring[i];
 450                 kfree(adev->gfx.mec.mqd_backup[i]);
 451                 amdgpu_bo_free_kernel(&ring->mqd_obj,
 452                                       &ring->mqd_gpu_addr,
 453                                       &ring->mqd_ptr);
 454         }
 455
 456         ring = &adev->gfx.kiq.ring;
 457         kfree(adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS]);
 458         amdgpu_bo_free_kernel(&ring->mqd_obj,
 459                               &ring->mqd_gpu_addr,
 460                               &ring->mqd_ptr);
 461 }
 462
 463 int amdgpu_gfx_disable_kcq(struct amdgpu_device *adev)
 464 {
 465         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 466         struct amdgpu_ring *kiq_ring = &kiq->ring;
 467         int i;
 468
 469         if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
 470                 return -EINVAL;
 471
 472         if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size *
 473                                         adev->gfx.num_compute_rings))
 474                 return -ENOMEM;
 475
 476         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 477                 kiq->pmf->kiq_unmap_queues(kiq_ring, &adev->gfx.compute_ring[i],
 478                                            RESET_QUEUES, 0, 0);
 479
 480         return amdgpu_ring_test_ring(kiq_ring);
 481 }
 482
 483 int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev)
 484 {
 485         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 486         struct amdgpu_ring *kiq_ring = &adev->gfx.kiq.ring;
 487         uint64_t queue_mask = 0;
 488         int r, i;
 489
 490         if (!kiq->pmf || !kiq->pmf->kiq_map_queues || !kiq->pmf->kiq_set_resources)
 491                 return -EINVAL;
 492
 493         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
 494                 if (!test_bit(i, adev->gfx.mec.queue_bitmap))
 495                         continue;
 496
 497                 /* This situation may be hit in the future if a new HW
 498                  * generation exposes more than 64 queues. If so, the
 499                  * definition of queue_mask needs updating */
 500                 if (WARN_ON(i > (sizeof(queue_mask)*8))) {
 501                         DRM_ERROR("Invalid KCQ enabled: %d\n", i);
 502                         break;
 503                 }
 504
 505                 queue_mask |= (1ull << i);
 506         }
 507
 508         DRM_INFO("kiq ring mec %d pipe %d q %d\n", kiq_ring->me, kiq_ring->pipe,
 509                                                         kiq_ring->queue);
 510
 511         r = amdgpu_ring_alloc(kiq_ring, kiq->pmf->map_queues_size *
 512                                         adev->gfx.num_compute_rings +
 513                                         kiq->pmf->set_resources_size);
 514         if (r) {
 515                 DRM_ERROR("Failed to lock KIQ (%d).\n", r);
 516                 return r;
 517         }
 518
 519         kiq->pmf->kiq_set_resources(kiq_ring, queue_mask);
 520         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 521                 kiq->pmf->kiq_map_queues(kiq_ring, &adev->gfx.compute_ring[i]);
 522
 523         r = amdgpu_ring_test_helper(kiq_ring);
 524         if (r)
 525                 DRM_ERROR("KCQ enable failed\n");
 526
 527         return r;
 528 }
 529
 530 /* amdgpu_gfx_off_ctrl - Handle gfx off feature enable/disable
 531  *
 532  * @adev: amdgpu_device pointer
 533  * @bool enable true: enable gfx off feature, false: disable gfx off feature
 534  *
 535  * 1. gfx off feature will be enabled by gfx ip after gfx cg gp enabled.
 536  * 2. other client can send request to disable gfx off feature, the request should be honored.
 537  * 3. other client can cancel their request of disable gfx off feature
 538  * 4. other client should not send request to enable gfx off feature before disable gfx off feature.
 539  */
 540
 541 void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 542 {
 543         if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
 544                 return;
 545
 546         mutex_lock(&adev->gfx.gfx_off_mutex);
 547
 548         if (!enable)
 549                 adev->gfx.gfx_off_req_count++;
 550         else if (adev->gfx.gfx_off_req_count > 0)
 551                 adev->gfx.gfx_off_req_count--;
 552
 553         if (enable && !adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) {
 554                 schedule_delayed_work(&adev->gfx.gfx_off_delay_work, GFX_OFF_DELAY_ENABLE);
 555         } else if (!enable && adev->gfx.gfx_off_state) {
 556                 if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, false))
 557                         adev->gfx.gfx_off_state = false;
 558         }
 559
 560         mutex_unlock(&adev->gfx.gfx_off_mutex);
 561 }
 562
 563 int amdgpu_gfx_ras_late_init(struct amdgpu_device *adev)
 564 {
 565         int r;
 566         struct ras_fs_if fs_info = {
 567                 .sysfs_name = "gfx_err_count",
 568                 .debugfs_name = "gfx_err_inject",
 569         };
 570         struct ras_ih_if ih_info = {
 571                 .cb = amdgpu_gfx_process_ras_data_cb,
 572         };
 573
 574         if (!adev->gfx.ras_if) {
 575                 adev->gfx.ras_if = kmalloc(sizeof(struct ras_common_if), GFP_KERNEL);
 576                 if (!adev->gfx.ras_if)
 577                         return -ENOMEM;
 578                 adev->gfx.ras_if->block = AMDGPU_RAS_BLOCK__GFX;
 579                 adev->gfx.ras_if->type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
 580                 adev->gfx.ras_if->sub_block_index = 0;
 581                 strcpy(adev->gfx.ras_if->name, "gfx");
 582         }
 583         fs_info.head = ih_info.head = *adev->gfx.ras_if;
 584
 585         r = amdgpu_ras_late_init(adev, adev->gfx.ras_if,
 586                                  &fs_info, &ih_info);
 587         if (r)
 588                 goto free;
 589
 590         if (amdgpu_ras_is_supported(adev, adev->gfx.ras_if->block)) {
 591                 r = amdgpu_irq_get(adev, &adev->gfx.cp_ecc_error_irq, 0);
 592                 if (r)
 593                         goto late_fini;
 594         } else {
 595                 /* free gfx ras_if if ras is not supported */
 596                 r = 0;
 597                 goto free;
 598         }
 599
 600         return 0;
 601 late_fini:
 602         amdgpu_ras_late_fini(adev, adev->gfx.ras_if, &ih_info);
 603 free:
 604         kfree(adev->gfx.ras_if);
 605         adev->gfx.ras_if = NULL;
 606         return r;
 607 }
 608
 609 void amdgpu_gfx_ras_fini(struct amdgpu_device *adev)
 610 {
 611         if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__GFX) &&
 612                         adev->gfx.ras_if) {
 613                 struct ras_common_if *ras_if = adev->gfx.ras_if;
 614                 struct ras_ih_if ih_info = {
 615                         .head = *ras_if,
 616                         .cb = amdgpu_gfx_process_ras_data_cb,
 617                 };
 618
 619                 amdgpu_ras_late_fini(adev, ras_if, &ih_info);
 620                 kfree(ras_if);
 621         }
 622 }
 623
 624 int amdgpu_gfx_process_ras_data_cb(struct amdgpu_device *adev,
 625                 void *err_data,
 626                 struct amdgpu_iv_entry *entry)
 627 {
 628         /* TODO ue will trigger an interrupt.
 629          *
 630          * When “Full RAS” is enabled, the per-IP interrupt sources should
 631          * be disabled and the driver should only look for the aggregated
 632          * interrupt via sync flood
 633          */
 634         if (!amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__GFX)) {
 635                 kgd2kfd_set_sram_ecc_flag(adev->kfd.dev);
 636                 if (adev->gfx.funcs->query_ras_error_count)
 637                         adev->gfx.funcs->query_ras_error_count(adev, err_data);
 638                 amdgpu_ras_reset_gpu(adev);
 639         }
 640         return AMDGPU_RAS_SUCCESS;
 641 }
 642
 643 int amdgpu_gfx_cp_ecc_error_irq(struct amdgpu_device *adev,
 644                                   struct amdgpu_irq_src *source,
 645                                   struct amdgpu_iv_entry *entry)
 646 {
 647         struct ras_common_if *ras_if = adev->gfx.ras_if;
 648         struct ras_dispatch_if ih_data = {
 649                 .entry = entry,
 650         };
 651
 652         if (!ras_if)
 653                 return 0;
 654
 655         ih_data.head = *ras_if;
 656
 657         DRM_ERROR("CP ECC ERROR IRQ\n");
 658         amdgpu_ras_interrupt_dispatch(adev, &ih_data);
 659         return 0;
 660 }
 661
 662 uint32_t amdgpu_kiq_rreg(struct amdgpu_device *adev, uint32_t reg)
 663 {
 664         signed long r, cnt = 0;
 665         unsigned long flags;
 666         uint32_t seq;
 667         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 668         struct amdgpu_ring *ring = &kiq->ring;
 669
 670         BUG_ON(!ring->funcs->emit_rreg);
 671
 672         spin_lock_irqsave(&kiq->ring_lock, flags);
 673         amdgpu_ring_alloc(ring, 32);
 674         amdgpu_ring_emit_rreg(ring, reg);
 675         amdgpu_fence_emit_polling(ring, &seq);
 676         amdgpu_ring_commit(ring);
 677         spin_unlock_irqrestore(&kiq->ring_lock, flags);
 678
 679         r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 680
 681         /* don't wait anymore for gpu reset case because this way may
 682          * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
 683          * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
 684          * never return if we keep waiting in virt_kiq_rreg, which cause
 685          * gpu_recover() hang there.
 686          *
 687          * also don't wait anymore for IRQ context
 688          * */
 689         if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 690                 goto failed_kiq_read;
 691
 692         might_sleep();
 693         while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
 694                 msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 695                 r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 696         }
 697
 698         if (cnt > MAX_KIQ_REG_TRY)
 699                 goto failed_kiq_read;
 700
 701         return adev->wb.wb[kiq->reg_val_offs];
 702
 703 failed_kiq_read:
 704         pr_err("failed to read reg:%x\n", reg);
 705         return ~0;
 706 }
 707
 708 void amdgpu_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v)
 709 {
 710         signed long r, cnt = 0;
 711         unsigned long flags;
 712         uint32_t seq;
 713         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 714         struct amdgpu_ring *ring = &kiq->ring;
 715
 716         BUG_ON(!ring->funcs->emit_wreg);
 717
 718         spin_lock_irqsave(&kiq->ring_lock, flags);
 719         amdgpu_ring_alloc(ring, 32);
 720         amdgpu_ring_emit_wreg(ring, reg, v);
 721         amdgpu_fence_emit_polling(ring, &seq);
 722         amdgpu_ring_commit(ring);
 723         spin_unlock_irqrestore(&kiq->ring_lock, flags);
 724
 725         r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 726
 727         /* don't wait anymore for gpu reset case because this way may
 728          * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
 729          * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
 730          * never return if we keep waiting in virt_kiq_rreg, which cause
 731          * gpu_recover() hang there.
 732          *
 733          * also don't wait anymore for IRQ context
 734          * */
 735         if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 736                 goto failed_kiq_write;
 737
 738         might_sleep();
 739         while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
 740
 741                 msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 742                 r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 743         }
 744
 745         if (cnt > MAX_KIQ_REG_TRY)
 746                 goto failed_kiq_write;
 747
 748         return;
 749
 750 failed_kiq_write:
 751         pr_err("failed to write reg:%x\n", reg);
 752 }