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
  30 /* delay 0.1 second to enable gfx off feature */
  31 #define GFX_OFF_DELAY_ENABLE         msecs_to_jiffies(100)
  32
  33 /*
  34  * GPU GFX IP block helpers function.
  35  */
  36
  37 int amdgpu_gfx_mec_queue_to_bit(struct amdgpu_device *adev, int mec,
  38                                 int pipe, int queue)
  39 {
  40         int bit = 0;
  41
  42         bit += mec * adev->gfx.mec.num_pipe_per_mec
  43                 * adev->gfx.mec.num_queue_per_pipe;
  44         bit += pipe * adev->gfx.mec.num_queue_per_pipe;
  45         bit += queue;
  46
  47         return bit;
  48 }
  49
  50 void amdgpu_gfx_bit_to_mec_queue(struct amdgpu_device *adev, int bit,
  51                                  int *mec, int *pipe, int *queue)
  52 {
  53         *queue = bit % adev->gfx.mec.num_queue_per_pipe;
  54         *pipe = (bit / adev->gfx.mec.num_queue_per_pipe)
  55                 % adev->gfx.mec.num_pipe_per_mec;
  56         *mec = (bit / adev->gfx.mec.num_queue_per_pipe)
  57                / adev->gfx.mec.num_pipe_per_mec;
  58
  59 }
  60
  61 bool amdgpu_gfx_is_mec_queue_enabled(struct amdgpu_device *adev,
  62                                      int mec, int pipe, int queue)
  63 {
  64         return test_bit(amdgpu_gfx_mec_queue_to_bit(adev, mec, pipe, queue),
  65                         adev->gfx.mec.queue_bitmap);
  66 }
  67
  68 int amdgpu_gfx_me_queue_to_bit(struct amdgpu_device *adev,
  69                                int me, int pipe, int queue)
  70 {
  71         int bit = 0;
  72
  73         bit += me * adev->gfx.me.num_pipe_per_me
  74                 * adev->gfx.me.num_queue_per_pipe;
  75         bit += pipe * adev->gfx.me.num_queue_per_pipe;
  76         bit += queue;
  77
  78         return bit;
  79 }
  80
  81 void amdgpu_gfx_bit_to_me_queue(struct amdgpu_device *adev, int bit,
  82                                 int *me, int *pipe, int *queue)
  83 {
  84         *queue = bit % adev->gfx.me.num_queue_per_pipe;
  85         *pipe = (bit / adev->gfx.me.num_queue_per_pipe)
  86                 % adev->gfx.me.num_pipe_per_me;
  87         *me = (bit / adev->gfx.me.num_queue_per_pipe)
  88                 / adev->gfx.me.num_pipe_per_me;
  89 }
  90
  91 bool amdgpu_gfx_is_me_queue_enabled(struct amdgpu_device *adev,
  92                                     int me, int pipe, int queue)
  93 {
  94         return test_bit(amdgpu_gfx_me_queue_to_bit(adev, me, pipe, queue),
  95                         adev->gfx.me.queue_bitmap);
  96 }
  97
  98 /**
  99  * amdgpu_gfx_scratch_get - Allocate a scratch register
 100  *
 101  * @adev: amdgpu_device pointer
 102  * @reg: scratch register mmio offset
 103  *
 104  * Allocate a CP scratch register for use by the driver (all asics).
 105  * Returns 0 on success or -EINVAL on failure.
 106  */
 107 int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg)
 108 {
 109         int i;
 110
 111         i = ffs(adev->gfx.scratch.free_mask);
 112         if (i != 0 && i <= adev->gfx.scratch.num_reg) {
 113                 i--;
 114                 adev->gfx.scratch.free_mask &= ~(1u << i);
 115                 *reg = adev->gfx.scratch.reg_base + i;
 116                 return 0;
 117         }
 118         return -EINVAL;
 119 }
 120
 121 /**
 122  * amdgpu_gfx_scratch_free - Free a scratch register
 123  *
 124  * @adev: amdgpu_device pointer
 125  * @reg: scratch register mmio offset
 126  *
 127  * Free a CP scratch register allocated for use by the driver (all asics)
 128  */
 129 void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg)
 130 {
 131         adev->gfx.scratch.free_mask |= 1u << (reg - adev->gfx.scratch.reg_base);
 132 }
 133
 134 /**
 135  * amdgpu_gfx_parse_disable_cu - Parse the disable_cu module parameter
 136  *
 137  * @mask: array in which the per-shader array disable masks will be stored
 138  * @max_se: number of SEs
 139  * @max_sh: number of SHs
 140  *
 141  * The bitmask of CUs to be disabled in the shader array determined by se and
 142  * sh is stored in mask[se * max_sh + sh].
 143  */
 144 void amdgpu_gfx_parse_disable_cu(unsigned *mask, unsigned max_se, unsigned max_sh)
 145 {
 146         unsigned se, sh, cu;
 147         const char *p;
 148
 149         memset(mask, 0, sizeof(*mask) * max_se * max_sh);
 150
 151         if (!amdgpu_disable_cu || !*amdgpu_disable_cu)
 152                 return;
 153
 154         p = amdgpu_disable_cu;
 155         for (;;) {
 156                 char *next;
 157                 int ret = sscanf(p, "%u.%u.%u", &se, &sh, &cu);
 158                 if (ret < 3) {
 159                         DRM_ERROR("amdgpu: could not parse disable_cu\n");
 160                         return;
 161                 }
 162
 163                 if (se < max_se && sh < max_sh && cu < 16) {
 164                         DRM_INFO("amdgpu: disabling CU %u.%u.%u\n", se, sh, cu);
 165                         mask[se * max_sh + sh] |= 1u << cu;
 166                 } else {
 167                         DRM_ERROR("amdgpu: disable_cu %u.%u.%u is out of range\n",
 168                                   se, sh, cu);
 169                 }
 170
 171                 next = strchr(p, ',');
 172                 if (!next)
 173                         break;
 174                 p = next + 1;
 175         }
 176 }
 177
 178 static bool amdgpu_gfx_is_multipipe_capable(struct amdgpu_device *adev)
 179 {
 180         if (amdgpu_compute_multipipe != -1) {
 181                 DRM_INFO("amdgpu: forcing compute pipe policy %d\n",
 182                          amdgpu_compute_multipipe);
 183                 return amdgpu_compute_multipipe == 1;
 184         }
 185
 186         /* FIXME: spreading the queues across pipes causes perf regressions
 187          * on POLARIS11 compute workloads */
 188         if (adev->asic_type == CHIP_POLARIS11)
 189                 return false;
 190
 191         return adev->gfx.mec.num_mec > 1;
 192 }
 193
 194 void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
 195 {
 196         int i, queue, pipe, mec;
 197         bool multipipe_policy = amdgpu_gfx_is_multipipe_capable(adev);
 198
 199         /* policy for amdgpu compute queue ownership */
 200         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
 201                 queue = i % adev->gfx.mec.num_queue_per_pipe;
 202                 pipe = (i / adev->gfx.mec.num_queue_per_pipe)
 203                         % adev->gfx.mec.num_pipe_per_mec;
 204                 mec = (i / adev->gfx.mec.num_queue_per_pipe)
 205                         / adev->gfx.mec.num_pipe_per_mec;
 206
 207                 /* we've run out of HW */
 208                 if (mec >= adev->gfx.mec.num_mec)
 209                         break;
 210
 211                 if (multipipe_policy) {
 212                         /* policy: amdgpu owns the first two queues of the first MEC */
 213                         if (mec == 0 && queue < 2)
 214                                 set_bit(i, adev->gfx.mec.queue_bitmap);
 215                 } else {
 216                         /* policy: amdgpu owns all queues in the first pipe */
 217                         if (mec == 0 && pipe == 0)
 218                                 set_bit(i, adev->gfx.mec.queue_bitmap);
 219                 }
 220         }
 221
 222         /* update the number of active compute rings */
 223         adev->gfx.num_compute_rings =
 224                 bitmap_weight(adev->gfx.mec.queue_bitmap, AMDGPU_MAX_COMPUTE_QUEUES);
 225
 226         /* If you hit this case and edited the policy, you probably just
 227          * need to increase AMDGPU_MAX_COMPUTE_RINGS */
 228         if (WARN_ON(adev->gfx.num_compute_rings > AMDGPU_MAX_COMPUTE_RINGS))
 229                 adev->gfx.num_compute_rings = AMDGPU_MAX_COMPUTE_RINGS;
 230 }
 231
 232 void amdgpu_gfx_graphics_queue_acquire(struct amdgpu_device *adev)
 233 {
 234         int i, queue, pipe, me;
 235
 236         for (i = 0; i < AMDGPU_MAX_GFX_QUEUES; ++i) {
 237                 queue = i % adev->gfx.me.num_queue_per_pipe;
 238                 pipe = (i / adev->gfx.me.num_queue_per_pipe)
 239                         % adev->gfx.me.num_pipe_per_me;
 240                 me = (i / adev->gfx.me.num_queue_per_pipe)
 241                       / adev->gfx.me.num_pipe_per_me;
 242
 243                 if (me >= adev->gfx.me.num_me)
 244                         break;
 245                 /* policy: amdgpu owns the first queue per pipe at this stage
 246                  * will extend to mulitple queues per pipe later */
 247                 if (me == 0 && queue < 1)
 248                         set_bit(i, adev->gfx.me.queue_bitmap);
 249         }
 250
 251         /* update the number of active graphics rings */
 252         adev->gfx.num_gfx_rings =
 253                 bitmap_weight(adev->gfx.me.queue_bitmap, AMDGPU_MAX_GFX_QUEUES);
 254 }
 255
 256 static int amdgpu_gfx_kiq_acquire(struct amdgpu_device *adev,
 257                                   struct amdgpu_ring *ring)
 258 {
 259         int queue_bit;
 260         int mec, pipe, queue;
 261
 262         queue_bit = adev->gfx.mec.num_mec
 263                     * adev->gfx.mec.num_pipe_per_mec
 264                     * adev->gfx.mec.num_queue_per_pipe;
 265
 266         while (queue_bit-- >= 0) {
 267                 if (test_bit(queue_bit, adev->gfx.mec.queue_bitmap))
 268                         continue;
 269
 270                 amdgpu_gfx_bit_to_mec_queue(adev, queue_bit, &mec, &pipe, &queue);
 271
 272                 /*
 273                  * 1. Using pipes 2/3 from MEC 2 seems cause problems.
 274                  * 2. It must use queue id 0, because CGPG_IDLE/SAVE/LOAD/RUN
 275                  * only can be issued on queue 0.
 276                  */
 277                 if ((mec == 1 && pipe > 1) || queue != 0)
 278                         continue;
 279
 280                 ring->me = mec + 1;
 281                 ring->pipe = pipe;
 282                 ring->queue = queue;
 283
 284                 return 0;
 285         }
 286
 287         dev_err(adev->dev, "Failed to find a queue for KIQ\n");
 288         return -EINVAL;
 289 }
 290
 291 int amdgpu_gfx_kiq_init_ring(struct amdgpu_device *adev,
 292                              struct amdgpu_ring *ring,
 293                              struct amdgpu_irq_src *irq)
 294 {
 295         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 296         int r = 0;
 297
 298         spin_lock_init(&kiq->ring_lock);
 299
 300         r = amdgpu_device_wb_get(adev, &adev->virt.reg_val_offs);
 301         if (r)
 302                 return r;
 303
 304         ring->adev = NULL;
 305         ring->ring_obj = NULL;
 306         ring->use_doorbell = true;
 307         ring->doorbell_index = adev->doorbell_index.kiq;
 308
 309         r = amdgpu_gfx_kiq_acquire(adev, ring);
 310         if (r)
 311                 return r;
 312
 313         ring->eop_gpu_addr = kiq->eop_gpu_addr;
 314         sprintf(ring->name, "kiq_%d.%d.%d", ring->me, ring->pipe, ring->queue);
 315         r = amdgpu_ring_init(adev, ring, 1024,
 316                              irq, AMDGPU_CP_KIQ_IRQ_DRIVER0);
 317         if (r)
 318                 dev_warn(adev->dev, "(%d) failed to init kiq ring\n", r);
 319
 320         return r;
 321 }
 322
 323 void amdgpu_gfx_kiq_free_ring(struct amdgpu_ring *ring,
 324                               struct amdgpu_irq_src *irq)
 325 {
 326         amdgpu_device_wb_free(ring->adev, ring->adev->virt.reg_val_offs);
 327         amdgpu_ring_fini(ring);
 328 }
 329
 330 void amdgpu_gfx_kiq_fini(struct amdgpu_device *adev)
 331 {
 332         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 333
 334         amdgpu_bo_free_kernel(&kiq->eop_obj, &kiq->eop_gpu_addr, NULL);
 335 }
 336
 337 int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
 338                         unsigned hpd_size)
 339 {
 340         int r;
 341         u32 *hpd;
 342         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 343
 344         r = amdgpu_bo_create_kernel(adev, hpd_size, PAGE_SIZE,
 345                                     AMDGPU_GEM_DOMAIN_GTT, &kiq->eop_obj,
 346                                     &kiq->eop_gpu_addr, (void **)&hpd);
 347         if (r) {
 348                 dev_warn(adev->dev, "failed to create KIQ bo (%d).\n", r);
 349                 return r;
 350         }
 351
 352         memset(hpd, 0, hpd_size);
 353
 354         r = amdgpu_bo_reserve(kiq->eop_obj, true);
 355         if (unlikely(r != 0))
 356                 dev_warn(adev->dev, "(%d) reserve kiq eop bo failed\n", r);
 357         amdgpu_bo_kunmap(kiq->eop_obj);
 358         amdgpu_bo_unreserve(kiq->eop_obj);
 359
 360         return 0;
 361 }
 362
 363 /* create MQD for each compute/gfx queue */
 364 int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
 365                            unsigned mqd_size)
 366 {
 367         struct amdgpu_ring *ring = NULL;
 368         int r, i;
 369
 370         /* create MQD for KIQ */
 371         ring = &adev->gfx.kiq.ring;
 372         if (!ring->mqd_obj) {
 373                 /* originaly the KIQ MQD is put in GTT domain, but for SRIOV VRAM domain is a must
 374                  * otherwise hypervisor trigger SAVE_VF fail after driver unloaded which mean MQD
 375                  * deallocated and gart_unbind, to strict diverage we decide to use VRAM domain for
 376                  * KIQ MQD no matter SRIOV or Bare-metal
 377                  */
 378                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 379                                             AMDGPU_GEM_DOMAIN_VRAM, &ring->mqd_obj,
 380                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 381                 if (r) {
 382                         dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
 383                         return r;
 384                 }
 385
 386                 /* prepare MQD backup */
 387                 adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS] = kmalloc(mqd_size, GFP_KERNEL);
 388                 if (!adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS])
 389                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 390         }
 391
 392         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 393                 /* create MQD for each KGQ */
 394                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 395                         ring = &adev->gfx.gfx_ring[i];
 396                         if (!ring->mqd_obj) {
 397                                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 398                                                             AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 399                                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 400                                 if (r) {
 401                                         dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 402                                         return r;
 403                                 }
 404
 405                                 /* prepare MQD backup */
 406                                 adev->gfx.me.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 407                                 if (!adev->gfx.me.mqd_backup[i])
 408                                         dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 409                         }
 410                 }
 411         }
 412
 413         /* create MQD for each KCQ */
 414         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 415                 ring = &adev->gfx.compute_ring[i];
 416                 if (!ring->mqd_obj) {
 417                         r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 418                                                     AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 419                                                     &ring->mqd_gpu_addr, &ring->mqd_ptr);
 420                         if (r) {
 421                                 dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 422                                 return r;
 423                         }
 424
 425                         /* prepare MQD backup */
 426                         adev->gfx.mec.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 427                         if (!adev->gfx.mec.mqd_backup[i])
 428                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 429                 }
 430         }
 431
 432         return 0;
 433 }
 434
 435 void amdgpu_gfx_mqd_sw_fini(struct amdgpu_device *adev)
 436 {
 437         struct amdgpu_ring *ring = NULL;
 438         int i;
 439
 440         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 441                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 442                         ring = &adev->gfx.gfx_ring[i];
 443                         kfree(adev->gfx.me.mqd_backup[i]);
 444                         amdgpu_bo_free_kernel(&ring->mqd_obj,
 445                                               &ring->mqd_gpu_addr,
 446                                               &ring->mqd_ptr);
 447                 }
 448         }
 449
 450         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 451                 ring = &adev->gfx.compute_ring[i];
 452                 kfree(adev->gfx.mec.mqd_backup[i]);
 453                 amdgpu_bo_free_kernel(&ring->mqd_obj,
 454                                       &ring->mqd_gpu_addr,
 455                                       &ring->mqd_ptr);
 456         }
 457
 458         ring = &adev->gfx.kiq.ring;
 459         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring)
 460                 kfree(adev->gfx.me.mqd_backup[AMDGPU_MAX_GFX_RINGS]);
 461         kfree(adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS]);
 462         amdgpu_bo_free_kernel(&ring->mqd_obj,
 463                               &ring->mqd_gpu_addr,
 464                               &ring->mqd_ptr);
 465 }
 466
 467 int amdgpu_gfx_disable_kcq(struct amdgpu_device *adev)
 468 {
 469         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 470         struct amdgpu_ring *kiq_ring = &kiq->ring;
 471         int i;
 472
 473         if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
 474                 return -EINVAL;
 475
 476         if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size *
 477                                         adev->gfx.num_compute_rings))
 478                 return -ENOMEM;
 479
 480         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 481                 kiq->pmf->kiq_unmap_queues(kiq_ring, &adev->gfx.compute_ring[i],
 482                                            RESET_QUEUES, 0, 0);
 483
 484         return amdgpu_ring_test_ring(kiq_ring);
 485 }
 486
 487 int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev)
 488 {
 489         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 490         struct amdgpu_ring *kiq_ring = &adev->gfx.kiq.ring;
 491         uint64_t queue_mask = 0;
 492         int r, i;
 493
 494         if (!kiq->pmf || !kiq->pmf->kiq_map_queues || !kiq->pmf->kiq_set_resources)
 495                 return -EINVAL;
 496
 497         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
 498                 if (!test_bit(i, adev->gfx.mec.queue_bitmap))
 499                         continue;
 500
 501                 /* This situation may be hit in the future if a new HW
 502                  * generation exposes more than 64 queues. If so, the
 503                  * definition of queue_mask needs updating */
 504                 if (WARN_ON(i > (sizeof(queue_mask)*8))) {
 505                         DRM_ERROR("Invalid KCQ enabled: %d\n", i);
 506                         break;
 507                 }
 508
 509                 queue_mask |= (1ull << i);
 510         }
 511
 512         DRM_INFO("kiq ring mec %d pipe %d q %d\n", kiq_ring->me, kiq_ring->pipe,
 513                                                         kiq_ring->queue);
 514
 515         r = amdgpu_ring_alloc(kiq_ring, kiq->pmf->map_queues_size *
 516                                         adev->gfx.num_compute_rings +
 517                                         kiq->pmf->set_resources_size);
 518         if (r) {
 519                 DRM_ERROR("Failed to lock KIQ (%d).\n", r);
 520                 return r;
 521         }
 522
 523         kiq->pmf->kiq_set_resources(kiq_ring, queue_mask);
 524         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 525                 kiq->pmf->kiq_map_queues(kiq_ring, &adev->gfx.compute_ring[i]);
 526
 527         r = amdgpu_ring_test_helper(kiq_ring);
 528         if (r)
 529                 DRM_ERROR("KCQ enable failed\n");
 530
 531         return r;
 532 }
 533
 534 /* amdgpu_gfx_off_ctrl - Handle gfx off feature enable/disable
 535  *
 536  * @adev: amdgpu_device pointer
 537  * @bool enable true: enable gfx off feature, false: disable gfx off feature
 538  *
 539  * 1. gfx off feature will be enabled by gfx ip after gfx cg gp enabled.
 540  * 2. other client can send request to disable gfx off feature, the request should be honored.
 541  * 3. other client can cancel their request of disable gfx off feature
 542  * 4. other client should not send request to enable gfx off feature before disable gfx off feature.
 543  */
 544
 545 void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 546 {
 547         if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
 548                 return;
 549
 550         if (!is_support_sw_smu(adev) &&
 551             (!adev->powerplay.pp_funcs ||
 552              !adev->powerplay.pp_funcs->set_powergating_by_smu))
 553                 return;
 554
 555
 556         mutex_lock(&adev->gfx.gfx_off_mutex);
 557
 558         if (!enable)
 559                 adev->gfx.gfx_off_req_count++;
 560         else if (adev->gfx.gfx_off_req_count > 0)
 561                 adev->gfx.gfx_off_req_count--;
 562
 563         if (enable && !adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) {
 564                 schedule_delayed_work(&adev->gfx.gfx_off_delay_work, GFX_OFF_DELAY_ENABLE);
 565         } else if (!enable && adev->gfx.gfx_off_state) {
 566                 if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, false))
 567                         adev->gfx.gfx_off_state = false;
 568         }
 569
 570         mutex_unlock(&adev->gfx.gfx_off_mutex);
 571 }