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         r = amdgpu_device_wb_get(adev, &kiq->reg_val_offs);
 308         if (r)
 309                 return r;
 310
 311         ring->adev = NULL;
 312         ring->ring_obj = NULL;
 313         ring->use_doorbell = true;
 314         ring->doorbell_index = adev->doorbell_index.kiq;
 315
 316         r = amdgpu_gfx_kiq_acquire(adev, ring);
 317         if (r)
 318                 return r;
 319
 320         ring->eop_gpu_addr = kiq->eop_gpu_addr;
 321         sprintf(ring->name, "kiq_%d.%d.%d", ring->me, ring->pipe, ring->queue);
 322         r = amdgpu_ring_init(adev, ring, 1024,
 323                              irq, AMDGPU_CP_KIQ_IRQ_DRIVER0);
 324         if (r)
 325                 dev_warn(adev->dev, "(%d) failed to init kiq ring\n", r);
 326
 327         return r;
 328 }
 329
 330 void amdgpu_gfx_kiq_free_ring(struct amdgpu_ring *ring)
 331 {
 332         amdgpu_device_wb_free(ring->adev, ring->adev->gfx.kiq.reg_val_offs);
 333         amdgpu_ring_fini(ring);
 334 }
 335
 336 void amdgpu_gfx_kiq_fini(struct amdgpu_device *adev)
 337 {
 338         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 339
 340         amdgpu_bo_free_kernel(&kiq->eop_obj, &kiq->eop_gpu_addr, NULL);
 341 }
 342
 343 int amdgpu_gfx_kiq_init(struct amdgpu_device *adev,
 344                         unsigned hpd_size)
 345 {
 346         int r;
 347         u32 *hpd;
 348         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 349
 350         r = amdgpu_bo_create_kernel(adev, hpd_size, PAGE_SIZE,
 351                                     AMDGPU_GEM_DOMAIN_GTT, &kiq->eop_obj,
 352                                     &kiq->eop_gpu_addr, (void **)&hpd);
 353         if (r) {
 354                 dev_warn(adev->dev, "failed to create KIQ bo (%d).\n", r);
 355                 return r;
 356         }
 357
 358         memset(hpd, 0, hpd_size);
 359
 360         r = amdgpu_bo_reserve(kiq->eop_obj, true);
 361         if (unlikely(r != 0))
 362                 dev_warn(adev->dev, "(%d) reserve kiq eop bo failed\n", r);
 363         amdgpu_bo_kunmap(kiq->eop_obj);
 364         amdgpu_bo_unreserve(kiq->eop_obj);
 365
 366         return 0;
 367 }
 368
 369 /* create MQD for each compute/gfx queue */
 370 int amdgpu_gfx_mqd_sw_init(struct amdgpu_device *adev,
 371                            unsigned mqd_size)
 372 {
 373         struct amdgpu_ring *ring = NULL;
 374         int r, i;
 375
 376         /* create MQD for KIQ */
 377         ring = &adev->gfx.kiq.ring;
 378         if (!ring->mqd_obj) {
 379                 /* originaly the KIQ MQD is put in GTT domain, but for SRIOV VRAM domain is a must
 380                  * otherwise hypervisor trigger SAVE_VF fail after driver unloaded which mean MQD
 381                  * deallocated and gart_unbind, to strict diverage we decide to use VRAM domain for
 382                  * KIQ MQD no matter SRIOV or Bare-metal
 383                  */
 384                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 385                                             AMDGPU_GEM_DOMAIN_VRAM, &ring->mqd_obj,
 386                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 387                 if (r) {
 388                         dev_warn(adev->dev, "failed to create ring mqd ob (%d)", r);
 389                         return r;
 390                 }
 391
 392                 /* prepare MQD backup */
 393                 adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS] = kmalloc(mqd_size, GFP_KERNEL);
 394                 if (!adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS])
 395                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 396         }
 397
 398         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 399                 /* create MQD for each KGQ */
 400                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 401                         ring = &adev->gfx.gfx_ring[i];
 402                         if (!ring->mqd_obj) {
 403                                 r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 404                                                             AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 405                                                             &ring->mqd_gpu_addr, &ring->mqd_ptr);
 406                                 if (r) {
 407                                         dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 408                                         return r;
 409                                 }
 410
 411                                 /* prepare MQD backup */
 412                                 adev->gfx.me.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 413                                 if (!adev->gfx.me.mqd_backup[i])
 414                                         dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 415                         }
 416                 }
 417         }
 418
 419         /* create MQD for each KCQ */
 420         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 421                 ring = &adev->gfx.compute_ring[i];
 422                 if (!ring->mqd_obj) {
 423                         r = amdgpu_bo_create_kernel(adev, mqd_size, PAGE_SIZE,
 424                                                     AMDGPU_GEM_DOMAIN_GTT, &ring->mqd_obj,
 425                                                     &ring->mqd_gpu_addr, &ring->mqd_ptr);
 426                         if (r) {
 427                                 dev_warn(adev->dev, "failed to create ring mqd bo (%d)", r);
 428                                 return r;
 429                         }
 430
 431                         /* prepare MQD backup */
 432                         adev->gfx.mec.mqd_backup[i] = kmalloc(mqd_size, GFP_KERNEL);
 433                         if (!adev->gfx.mec.mqd_backup[i])
 434                                 dev_warn(adev->dev, "no memory to create MQD backup for ring %s\n", ring->name);
 435                 }
 436         }
 437
 438         return 0;
 439 }
 440
 441 void amdgpu_gfx_mqd_sw_fini(struct amdgpu_device *adev)
 442 {
 443         struct amdgpu_ring *ring = NULL;
 444         int i;
 445
 446         if (adev->asic_type >= CHIP_NAVI10 && amdgpu_async_gfx_ring) {
 447                 for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
 448                         ring = &adev->gfx.gfx_ring[i];
 449                         kfree(adev->gfx.me.mqd_backup[i]);
 450                         amdgpu_bo_free_kernel(&ring->mqd_obj,
 451                                               &ring->mqd_gpu_addr,
 452                                               &ring->mqd_ptr);
 453                 }
 454         }
 455
 456         for (i = 0; i < adev->gfx.num_compute_rings; i++) {
 457                 ring = &adev->gfx.compute_ring[i];
 458                 kfree(adev->gfx.mec.mqd_backup[i]);
 459                 amdgpu_bo_free_kernel(&ring->mqd_obj,
 460                                       &ring->mqd_gpu_addr,
 461                                       &ring->mqd_ptr);
 462         }
 463
 464         ring = &adev->gfx.kiq.ring;
 465         kfree(adev->gfx.mec.mqd_backup[AMDGPU_MAX_COMPUTE_RINGS]);
 466         amdgpu_bo_free_kernel(&ring->mqd_obj,
 467                               &ring->mqd_gpu_addr,
 468                               &ring->mqd_ptr);
 469 }
 470
 471 int amdgpu_gfx_disable_kcq(struct amdgpu_device *adev)
 472 {
 473         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 474         struct amdgpu_ring *kiq_ring = &kiq->ring;
 475         int i;
 476
 477         if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
 478                 return -EINVAL;
 479
 480         if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size *
 481                                         adev->gfx.num_compute_rings))
 482                 return -ENOMEM;
 483
 484         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 485                 kiq->pmf->kiq_unmap_queues(kiq_ring, &adev->gfx.compute_ring[i],
 486                                            RESET_QUEUES, 0, 0);
 487
 488         return amdgpu_ring_test_helper(kiq_ring);
 489 }
 490
 491 int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev)
 492 {
 493         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 494         struct amdgpu_ring *kiq_ring = &adev->gfx.kiq.ring;
 495         uint64_t queue_mask = 0;
 496         int r, i;
 497
 498         if (!kiq->pmf || !kiq->pmf->kiq_map_queues || !kiq->pmf->kiq_set_resources)
 499                 return -EINVAL;
 500
 501         for (i = 0; i < AMDGPU_MAX_COMPUTE_QUEUES; ++i) {
 502                 if (!test_bit(i, adev->gfx.mec.queue_bitmap))
 503                         continue;
 504
 505                 /* This situation may be hit in the future if a new HW
 506                  * generation exposes more than 64 queues. If so, the
 507                  * definition of queue_mask needs updating */
 508                 if (WARN_ON(i > (sizeof(queue_mask)*8))) {
 509                         DRM_ERROR("Invalid KCQ enabled: %d\n", i);
 510                         break;
 511                 }
 512
 513                 queue_mask |= (1ull << i);
 514         }
 515
 516         DRM_INFO("kiq ring mec %d pipe %d q %d\n", kiq_ring->me, kiq_ring->pipe,
 517                                                         kiq_ring->queue);
 518
 519         r = amdgpu_ring_alloc(kiq_ring, kiq->pmf->map_queues_size *
 520                                         adev->gfx.num_compute_rings +
 521                                         kiq->pmf->set_resources_size);
 522         if (r) {
 523                 DRM_ERROR("Failed to lock KIQ (%d).\n", r);
 524                 return r;
 525         }
 526
 527         kiq->pmf->kiq_set_resources(kiq_ring, queue_mask);
 528         for (i = 0; i < adev->gfx.num_compute_rings; i++)
 529                 kiq->pmf->kiq_map_queues(kiq_ring, &adev->gfx.compute_ring[i]);
 530
 531         r = amdgpu_ring_test_helper(kiq_ring);
 532         if (r)
 533                 DRM_ERROR("KCQ enable failed\n");
 534
 535         return r;
 536 }
 537
 538 /* amdgpu_gfx_off_ctrl - Handle gfx off feature enable/disable
 539  *
 540  * @adev: amdgpu_device pointer
 541  * @bool enable true: enable gfx off feature, false: disable gfx off feature
 542  *
 543  * 1. gfx off feature will be enabled by gfx ip after gfx cg gp enabled.
 544  * 2. other client can send request to disable gfx off feature, the request should be honored.
 545  * 3. other client can cancel their request of disable gfx off feature
 546  * 4. other client should not send request to enable gfx off feature before disable gfx off feature.
 547  */
 548
 549 void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 550 {
 551         if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
 552                 return;
 553
 554         mutex_lock(&adev->gfx.gfx_off_mutex);
 555
 556         if (!enable)
 557                 adev->gfx.gfx_off_req_count++;
 558         else if (adev->gfx.gfx_off_req_count > 0)
 559                 adev->gfx.gfx_off_req_count--;
 560
 561         if (enable && !adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) {
 562                 schedule_delayed_work(&adev->gfx.gfx_off_delay_work, GFX_OFF_DELAY_ENABLE);
 563         } else if (!enable && adev->gfx.gfx_off_state) {
 564                 if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, false))
 565                         adev->gfx.gfx_off_state = false;
 566         }
 567
 568         mutex_unlock(&adev->gfx.gfx_off_mutex);
 569 }
 570
 571 int amdgpu_gfx_ras_late_init(struct amdgpu_device *adev)
 572 {
 573         int r;
 574         struct ras_fs_if fs_info = {
 575                 .sysfs_name = "gfx_err_count",
 576         };
 577         struct ras_ih_if ih_info = {
 578                 .cb = amdgpu_gfx_process_ras_data_cb,
 579         };
 580
 581         if (!adev->gfx.ras_if) {
 582                 adev->gfx.ras_if = kmalloc(sizeof(struct ras_common_if), GFP_KERNEL);
 583                 if (!adev->gfx.ras_if)
 584                         return -ENOMEM;
 585                 adev->gfx.ras_if->block = AMDGPU_RAS_BLOCK__GFX;
 586                 adev->gfx.ras_if->type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
 587                 adev->gfx.ras_if->sub_block_index = 0;
 588                 strcpy(adev->gfx.ras_if->name, "gfx");
 589         }
 590         fs_info.head = ih_info.head = *adev->gfx.ras_if;
 591
 592         r = amdgpu_ras_late_init(adev, adev->gfx.ras_if,
 593                                  &fs_info, &ih_info);
 594         if (r)
 595                 goto free;
 596
 597         if (amdgpu_ras_is_supported(adev, adev->gfx.ras_if->block)) {
 598                 r = amdgpu_irq_get(adev, &adev->gfx.cp_ecc_error_irq, 0);
 599                 if (r)
 600                         goto late_fini;
 601         } else {
 602                 /* free gfx ras_if if ras is not supported */
 603                 r = 0;
 604                 goto free;
 605         }
 606
 607         return 0;
 608 late_fini:
 609         amdgpu_ras_late_fini(adev, adev->gfx.ras_if, &ih_info);
 610 free:
 611         kfree(adev->gfx.ras_if);
 612         adev->gfx.ras_if = NULL;
 613         return r;
 614 }
 615
 616 void amdgpu_gfx_ras_fini(struct amdgpu_device *adev)
 617 {
 618         if (amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__GFX) &&
 619                         adev->gfx.ras_if) {
 620                 struct ras_common_if *ras_if = adev->gfx.ras_if;
 621                 struct ras_ih_if ih_info = {
 622                         .head = *ras_if,
 623                         .cb = amdgpu_gfx_process_ras_data_cb,
 624                 };
 625
 626                 amdgpu_ras_late_fini(adev, ras_if, &ih_info);
 627                 kfree(ras_if);
 628         }
 629 }
 630
 631 int amdgpu_gfx_process_ras_data_cb(struct amdgpu_device *adev,
 632                 void *err_data,
 633                 struct amdgpu_iv_entry *entry)
 634 {
 635         /* TODO ue will trigger an interrupt.
 636          *
 637          * When “Full RAS” is enabled, the per-IP interrupt sources should
 638          * be disabled and the driver should only look for the aggregated
 639          * interrupt via sync flood
 640          */
 641         if (!amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__GFX)) {
 642                 kgd2kfd_set_sram_ecc_flag(adev->kfd.dev);
 643                 if (adev->gfx.funcs->query_ras_error_count)
 644                         adev->gfx.funcs->query_ras_error_count(adev, err_data);
 645                 amdgpu_ras_reset_gpu(adev);
 646         }
 647         return AMDGPU_RAS_SUCCESS;
 648 }
 649
 650 int amdgpu_gfx_cp_ecc_error_irq(struct amdgpu_device *adev,
 651                                   struct amdgpu_irq_src *source,
 652                                   struct amdgpu_iv_entry *entry)
 653 {
 654         struct ras_common_if *ras_if = adev->gfx.ras_if;
 655         struct ras_dispatch_if ih_data = {
 656                 .entry = entry,
 657         };
 658
 659         if (!ras_if)
 660                 return 0;
 661
 662         ih_data.head = *ras_if;
 663
 664         DRM_ERROR("CP ECC ERROR IRQ\n");
 665         amdgpu_ras_interrupt_dispatch(adev, &ih_data);
 666         return 0;
 667 }
 668
 669 uint32_t amdgpu_kiq_rreg(struct amdgpu_device *adev, uint32_t reg)
 670 {
 671         signed long r, cnt = 0;
 672         unsigned long flags;
 673         uint32_t seq;
 674         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 675         struct amdgpu_ring *ring = &kiq->ring;
 676
 677         BUG_ON(!ring->funcs->emit_rreg);
 678
 679         spin_lock_irqsave(&kiq->ring_lock, flags);
 680         amdgpu_ring_alloc(ring, 32);
 681         amdgpu_ring_emit_rreg(ring, reg);
 682         amdgpu_fence_emit_polling(ring, &seq);
 683         amdgpu_ring_commit(ring);
 684         spin_unlock_irqrestore(&kiq->ring_lock, flags);
 685
 686         r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 687
 688         /* don't wait anymore for gpu reset case because this way may
 689          * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
 690          * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
 691          * never return if we keep waiting in virt_kiq_rreg, which cause
 692          * gpu_recover() hang there.
 693          *
 694          * also don't wait anymore for IRQ context
 695          * */
 696         if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 697                 goto failed_kiq_read;
 698
 699         might_sleep();
 700         while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
 701                 msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 702                 r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 703         }
 704
 705         if (cnt > MAX_KIQ_REG_TRY)
 706                 goto failed_kiq_read;
 707
 708         return adev->wb.wb[kiq->reg_val_offs];
 709
 710 failed_kiq_read:
 711         pr_err("failed to read reg:%x\n", reg);
 712         return ~0;
 713 }
 714
 715 void amdgpu_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v)
 716 {
 717         signed long r, cnt = 0;
 718         unsigned long flags;
 719         uint32_t seq;
 720         struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 721         struct amdgpu_ring *ring = &kiq->ring;
 722
 723         BUG_ON(!ring->funcs->emit_wreg);
 724
 725         spin_lock_irqsave(&kiq->ring_lock, flags);
 726         amdgpu_ring_alloc(ring, 32);
 727         amdgpu_ring_emit_wreg(ring, reg, v);
 728         amdgpu_fence_emit_polling(ring, &seq);
 729         amdgpu_ring_commit(ring);
 730         spin_unlock_irqrestore(&kiq->ring_lock, flags);
 731
 732         r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 733
 734         /* don't wait anymore for gpu reset case because this way may
 735          * block gpu_recover() routine forever, e.g. this virt_kiq_rreg
 736          * is triggered in TTM and ttm_bo_lock_delayed_workqueue() will
 737          * never return if we keep waiting in virt_kiq_rreg, which cause
 738          * gpu_recover() hang there.
 739          *
 740          * also don't wait anymore for IRQ context
 741          * */
 742         if (r < 1 && (adev->in_gpu_reset || in_interrupt()))
 743                 goto failed_kiq_write;
 744
 745         might_sleep();
 746         while (r < 1 && cnt++ < MAX_KIQ_REG_TRY) {
 747
 748                 msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
 749                 r = amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
 750         }
 751
 752         if (cnt > MAX_KIQ_REG_TRY)
 753                 goto failed_kiq_write;
 754
 755         return;
 756
 757 failed_kiq_write:
 758         pr_err("failed to write reg:%x\n", reg);
 759 }