drivers/gpu/drm/amd/amdkfd/kfd_device.c

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include <linux/bsearch.h>
  24 #include <linux/pci.h>
  25 #include <linux/slab.h>
  26 #include "kfd_priv.h"
  27 #include "kfd_device_queue_manager.h"
  28 #include "kfd_pm4_headers_vi.h"
  29 #include "cwsr_trap_handler.h"
  30 #include "kfd_iommu.h"
  31 #include "amdgpu_amdkfd.h"
  32
  33 #define MQD_SIZE_ALIGNED 768
  34
  35 /*
  36  * kfd_locked is used to lock the kfd driver during suspend or reset
  37  * once locked, kfd driver will stop any further GPU execution.
  38  * create process (open) will return -EAGAIN.
  39  */
  40 static atomic_t kfd_locked = ATOMIC_INIT(0);
  41
  42 #ifdef CONFIG_DRM_AMDGPU_CIK
  43 extern const struct kfd2kgd_calls gfx_v7_kfd2kgd;
  44 #endif
  45 extern const struct kfd2kgd_calls gfx_v8_kfd2kgd;
  46 extern const struct kfd2kgd_calls gfx_v9_kfd2kgd;
  47 extern const struct kfd2kgd_calls arcturus_kfd2kgd;
  48 extern const struct kfd2kgd_calls gfx_v10_kfd2kgd;
  49
  50 static const struct kfd2kgd_calls *kfd2kgd_funcs[] = {
  51 #ifdef KFD_SUPPORT_IOMMU_V2
  52 #ifdef CONFIG_DRM_AMDGPU_CIK
  53         [CHIP_KAVERI] = &gfx_v7_kfd2kgd,
  54 #endif
  55         [CHIP_CARRIZO] = &gfx_v8_kfd2kgd,
  56         [CHIP_RAVEN] = &gfx_v9_kfd2kgd,
  57 #endif
  58 #ifdef CONFIG_DRM_AMDGPU_CIK
  59         [CHIP_HAWAII] = &gfx_v7_kfd2kgd,
  60 #endif
  61         [CHIP_TONGA] = &gfx_v8_kfd2kgd,
  62         [CHIP_FIJI] = &gfx_v8_kfd2kgd,
  63         [CHIP_POLARIS10] = &gfx_v8_kfd2kgd,
  64         [CHIP_POLARIS11] = &gfx_v8_kfd2kgd,
  65         [CHIP_POLARIS12] = &gfx_v8_kfd2kgd,
  66         [CHIP_VEGAM] = &gfx_v8_kfd2kgd,
  67         [CHIP_VEGA10] = &gfx_v9_kfd2kgd,
  68         [CHIP_VEGA12] = &gfx_v9_kfd2kgd,
  69         [CHIP_VEGA20] = &gfx_v9_kfd2kgd,
  70         [CHIP_RENOIR] = &gfx_v9_kfd2kgd,
  71         [CHIP_ARCTURUS] = &arcturus_kfd2kgd,
  72         [CHIP_NAVI10] = &gfx_v10_kfd2kgd,
  73         [CHIP_NAVI12] = &gfx_v10_kfd2kgd,
  74         [CHIP_NAVI14] = &gfx_v10_kfd2kgd,
  75 };
  76
  77 #ifdef KFD_SUPPORT_IOMMU_V2
  78 static const struct kfd_device_info kaveri_device_info = {
  79         .asic_family = CHIP_KAVERI,
  80         .asic_name = "kaveri",
  81         .max_pasid_bits = 16,
  82         /* max num of queues for KV.TODO should be a dynamic value */
  83         .max_no_of_hqd  = 24,
  84         .doorbell_size  = 4,
  85         .ih_ring_entry_size = 4 * sizeof(uint32_t),
  86         .event_interrupt_class = &event_interrupt_class_cik,
  87         .num_of_watch_points = 4,
  88         .mqd_size_aligned = MQD_SIZE_ALIGNED,
  89         .supports_cwsr = false,
  90         .needs_iommu_device = true,
  91         .needs_pci_atomics = false,
  92         .num_sdma_engines = 2,
  93         .num_xgmi_sdma_engines = 0,
  94         .num_sdma_queues_per_engine = 2,
  95 };
  96
  97 static const struct kfd_device_info carrizo_device_info = {
  98         .asic_family = CHIP_CARRIZO,
  99         .asic_name = "carrizo",
 100         .max_pasid_bits = 16,
 101         /* max num of queues for CZ.TODO should be a dynamic value */
 102         .max_no_of_hqd  = 24,
 103         .doorbell_size  = 4,
 104         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 105         .event_interrupt_class = &event_interrupt_class_cik,
 106         .num_of_watch_points = 4,
 107         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 108         .supports_cwsr = true,
 109         .needs_iommu_device = true,
 110         .needs_pci_atomics = false,
 111         .num_sdma_engines = 2,
 112         .num_xgmi_sdma_engines = 0,
 113         .num_sdma_queues_per_engine = 2,
 114 };
 115
 116 static const struct kfd_device_info raven_device_info = {
 117         .asic_family = CHIP_RAVEN,
 118         .asic_name = "raven",
 119         .max_pasid_bits = 16,
 120         .max_no_of_hqd  = 24,
 121         .doorbell_size  = 8,
 122         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 123         .event_interrupt_class = &event_interrupt_class_v9,
 124         .num_of_watch_points = 4,
 125         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 126         .supports_cwsr = true,
 127         .needs_iommu_device = true,
 128         .needs_pci_atomics = true,
 129         .num_sdma_engines = 1,
 130         .num_xgmi_sdma_engines = 0,
 131         .num_sdma_queues_per_engine = 2,
 132 };
 133 #endif
 134
 135 static const struct kfd_device_info hawaii_device_info = {
 136         .asic_family = CHIP_HAWAII,
 137         .asic_name = "hawaii",
 138         .max_pasid_bits = 16,
 139         /* max num of queues for KV.TODO should be a dynamic value */
 140         .max_no_of_hqd  = 24,
 141         .doorbell_size  = 4,
 142         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 143         .event_interrupt_class = &event_interrupt_class_cik,
 144         .num_of_watch_points = 4,
 145         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 146         .supports_cwsr = false,
 147         .needs_iommu_device = false,
 148         .needs_pci_atomics = false,
 149         .num_sdma_engines = 2,
 150         .num_xgmi_sdma_engines = 0,
 151         .num_sdma_queues_per_engine = 2,
 152 };
 153
 154 static const struct kfd_device_info tonga_device_info = {
 155         .asic_family = CHIP_TONGA,
 156         .asic_name = "tonga",
 157         .max_pasid_bits = 16,
 158         .max_no_of_hqd  = 24,
 159         .doorbell_size  = 4,
 160         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 161         .event_interrupt_class = &event_interrupt_class_cik,
 162         .num_of_watch_points = 4,
 163         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 164         .supports_cwsr = false,
 165         .needs_iommu_device = false,
 166         .needs_pci_atomics = true,
 167         .num_sdma_engines = 2,
 168         .num_xgmi_sdma_engines = 0,
 169         .num_sdma_queues_per_engine = 2,
 170 };
 171
 172 static const struct kfd_device_info fiji_device_info = {
 173         .asic_family = CHIP_FIJI,
 174         .asic_name = "fiji",
 175         .max_pasid_bits = 16,
 176         .max_no_of_hqd  = 24,
 177         .doorbell_size  = 4,
 178         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 179         .event_interrupt_class = &event_interrupt_class_cik,
 180         .num_of_watch_points = 4,
 181         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 182         .supports_cwsr = true,
 183         .needs_iommu_device = false,
 184         .needs_pci_atomics = true,
 185         .num_sdma_engines = 2,
 186         .num_xgmi_sdma_engines = 0,
 187         .num_sdma_queues_per_engine = 2,
 188 };
 189
 190 static const struct kfd_device_info fiji_vf_device_info = {
 191         .asic_family = CHIP_FIJI,
 192         .asic_name = "fiji",
 193         .max_pasid_bits = 16,
 194         .max_no_of_hqd  = 24,
 195         .doorbell_size  = 4,
 196         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 197         .event_interrupt_class = &event_interrupt_class_cik,
 198         .num_of_watch_points = 4,
 199         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 200         .supports_cwsr = true,
 201         .needs_iommu_device = false,
 202         .needs_pci_atomics = false,
 203         .num_sdma_engines = 2,
 204         .num_xgmi_sdma_engines = 0,
 205         .num_sdma_queues_per_engine = 2,
 206 };
 207
 208
 209 static const struct kfd_device_info polaris10_device_info = {
 210         .asic_family = CHIP_POLARIS10,
 211         .asic_name = "polaris10",
 212         .max_pasid_bits = 16,
 213         .max_no_of_hqd  = 24,
 214         .doorbell_size  = 4,
 215         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 216         .event_interrupt_class = &event_interrupt_class_cik,
 217         .num_of_watch_points = 4,
 218         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 219         .supports_cwsr = true,
 220         .needs_iommu_device = false,
 221         .needs_pci_atomics = true,
 222         .num_sdma_engines = 2,
 223         .num_xgmi_sdma_engines = 0,
 224         .num_sdma_queues_per_engine = 2,
 225 };
 226
 227 static const struct kfd_device_info polaris10_vf_device_info = {
 228         .asic_family = CHIP_POLARIS10,
 229         .asic_name = "polaris10",
 230         .max_pasid_bits = 16,
 231         .max_no_of_hqd  = 24,
 232         .doorbell_size  = 4,
 233         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 234         .event_interrupt_class = &event_interrupt_class_cik,
 235         .num_of_watch_points = 4,
 236         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 237         .supports_cwsr = true,
 238         .needs_iommu_device = false,
 239         .needs_pci_atomics = false,
 240         .num_sdma_engines = 2,
 241         .num_xgmi_sdma_engines = 0,
 242         .num_sdma_queues_per_engine = 2,
 243 };
 244
 245 static const struct kfd_device_info polaris11_device_info = {
 246         .asic_family = CHIP_POLARIS11,
 247         .asic_name = "polaris11",
 248         .max_pasid_bits = 16,
 249         .max_no_of_hqd  = 24,
 250         .doorbell_size  = 4,
 251         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 252         .event_interrupt_class = &event_interrupt_class_cik,
 253         .num_of_watch_points = 4,
 254         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 255         .supports_cwsr = true,
 256         .needs_iommu_device = false,
 257         .needs_pci_atomics = true,
 258         .num_sdma_engines = 2,
 259         .num_xgmi_sdma_engines = 0,
 260         .num_sdma_queues_per_engine = 2,
 261 };
 262
 263 static const struct kfd_device_info polaris12_device_info = {
 264         .asic_family = CHIP_POLARIS12,
 265         .asic_name = "polaris12",
 266         .max_pasid_bits = 16,
 267         .max_no_of_hqd  = 24,
 268         .doorbell_size  = 4,
 269         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 270         .event_interrupt_class = &event_interrupt_class_cik,
 271         .num_of_watch_points = 4,
 272         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 273         .supports_cwsr = true,
 274         .needs_iommu_device = false,
 275         .needs_pci_atomics = true,
 276         .num_sdma_engines = 2,
 277         .num_xgmi_sdma_engines = 0,
 278         .num_sdma_queues_per_engine = 2,
 279 };
 280
 281 static const struct kfd_device_info vegam_device_info = {
 282         .asic_family = CHIP_VEGAM,
 283         .asic_name = "vegam",
 284         .max_pasid_bits = 16,
 285         .max_no_of_hqd  = 24,
 286         .doorbell_size  = 4,
 287         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 288         .event_interrupt_class = &event_interrupt_class_cik,
 289         .num_of_watch_points = 4,
 290         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 291         .supports_cwsr = true,
 292         .needs_iommu_device = false,
 293         .needs_pci_atomics = true,
 294         .num_sdma_engines = 2,
 295         .num_xgmi_sdma_engines = 0,
 296         .num_sdma_queues_per_engine = 2,
 297 };
 298
 299 static const struct kfd_device_info vega10_device_info = {
 300         .asic_family = CHIP_VEGA10,
 301         .asic_name = "vega10",
 302         .max_pasid_bits = 16,
 303         .max_no_of_hqd  = 24,
 304         .doorbell_size  = 8,
 305         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 306         .event_interrupt_class = &event_interrupt_class_v9,
 307         .num_of_watch_points = 4,
 308         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 309         .supports_cwsr = true,
 310         .needs_iommu_device = false,
 311         .needs_pci_atomics = false,
 312         .num_sdma_engines = 2,
 313         .num_xgmi_sdma_engines = 0,
 314         .num_sdma_queues_per_engine = 2,
 315 };
 316
 317 static const struct kfd_device_info vega10_vf_device_info = {
 318         .asic_family = CHIP_VEGA10,
 319         .asic_name = "vega10",
 320         .max_pasid_bits = 16,
 321         .max_no_of_hqd  = 24,
 322         .doorbell_size  = 8,
 323         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 324         .event_interrupt_class = &event_interrupt_class_v9,
 325         .num_of_watch_points = 4,
 326         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 327         .supports_cwsr = true,
 328         .needs_iommu_device = false,
 329         .needs_pci_atomics = false,
 330         .num_sdma_engines = 2,
 331         .num_xgmi_sdma_engines = 0,
 332         .num_sdma_queues_per_engine = 2,
 333 };
 334
 335 static const struct kfd_device_info vega12_device_info = {
 336         .asic_family = CHIP_VEGA12,
 337         .asic_name = "vega12",
 338         .max_pasid_bits = 16,
 339         .max_no_of_hqd  = 24,
 340         .doorbell_size  = 8,
 341         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 342         .event_interrupt_class = &event_interrupt_class_v9,
 343         .num_of_watch_points = 4,
 344         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 345         .supports_cwsr = true,
 346         .needs_iommu_device = false,
 347         .needs_pci_atomics = false,
 348         .num_sdma_engines = 2,
 349         .num_xgmi_sdma_engines = 0,
 350         .num_sdma_queues_per_engine = 2,
 351 };
 352
 353 static const struct kfd_device_info vega20_device_info = {
 354         .asic_family = CHIP_VEGA20,
 355         .asic_name = "vega20",
 356         .max_pasid_bits = 16,
 357         .max_no_of_hqd  = 24,
 358         .doorbell_size  = 8,
 359         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 360         .event_interrupt_class = &event_interrupt_class_v9,
 361         .num_of_watch_points = 4,
 362         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 363         .supports_cwsr = true,
 364         .needs_iommu_device = false,
 365         .needs_pci_atomics = false,
 366         .num_sdma_engines = 2,
 367         .num_xgmi_sdma_engines = 0,
 368         .num_sdma_queues_per_engine = 8,
 369 };
 370
 371 static const struct kfd_device_info arcturus_device_info = {
 372         .asic_family = CHIP_ARCTURUS,
 373         .asic_name = "arcturus",
 374         .max_pasid_bits = 16,
 375         .max_no_of_hqd  = 24,
 376         .doorbell_size  = 8,
 377         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 378         .event_interrupt_class = &event_interrupt_class_v9,
 379         .num_of_watch_points = 4,
 380         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 381         .supports_cwsr = true,
 382         .needs_iommu_device = false,
 383         .needs_pci_atomics = false,
 384         .num_sdma_engines = 2,
 385         .num_xgmi_sdma_engines = 6,
 386         .num_sdma_queues_per_engine = 8,
 387 };
 388
 389 static const struct kfd_device_info renoir_device_info = {
 390         .asic_family = CHIP_RENOIR,
 391         .asic_name = "renoir",
 392         .max_pasid_bits = 16,
 393         .max_no_of_hqd  = 24,
 394         .doorbell_size  = 8,
 395         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 396         .event_interrupt_class = &event_interrupt_class_v9,
 397         .num_of_watch_points = 4,
 398         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 399         .supports_cwsr = true,
 400         .needs_iommu_device = false,
 401         .needs_pci_atomics = false,
 402         .num_sdma_engines = 1,
 403         .num_xgmi_sdma_engines = 0,
 404         .num_sdma_queues_per_engine = 2,
 405 };
 406
 407 static const struct kfd_device_info navi10_device_info = {
 408         .asic_family = CHIP_NAVI10,
 409         .asic_name = "navi10",
 410         .max_pasid_bits = 16,
 411         .max_no_of_hqd  = 24,
 412         .doorbell_size  = 8,
 413         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 414         .event_interrupt_class = &event_interrupt_class_v9,
 415         .num_of_watch_points = 4,
 416         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 417         .needs_iommu_device = false,
 418         .supports_cwsr = true,
 419         .needs_pci_atomics = false,
 420         .num_sdma_engines = 2,
 421         .num_xgmi_sdma_engines = 0,
 422         .num_sdma_queues_per_engine = 8,
 423 };
 424
 425 static const struct kfd_device_info navi12_device_info = {
 426         .asic_family = CHIP_NAVI12,
 427         .asic_name = "navi12",
 428         .max_pasid_bits = 16,
 429         .max_no_of_hqd  = 24,
 430         .doorbell_size  = 8,
 431         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 432         .event_interrupt_class = &event_interrupt_class_v9,
 433         .num_of_watch_points = 4,
 434         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 435         .needs_iommu_device = false,
 436         .supports_cwsr = true,
 437         .needs_pci_atomics = false,
 438         .num_sdma_engines = 2,
 439         .num_xgmi_sdma_engines = 0,
 440         .num_sdma_queues_per_engine = 8,
 441 };
 442
 443 static const struct kfd_device_info navi14_device_info = {
 444         .asic_family = CHIP_NAVI14,
 445         .asic_name = "navi14",
 446         .max_pasid_bits = 16,
 447         .max_no_of_hqd  = 24,
 448         .doorbell_size  = 8,
 449         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 450         .event_interrupt_class = &event_interrupt_class_v9,
 451         .num_of_watch_points = 4,
 452         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 453         .needs_iommu_device = false,
 454         .supports_cwsr = true,
 455         .needs_pci_atomics = false,
 456         .num_sdma_engines = 2,
 457         .num_xgmi_sdma_engines = 0,
 458         .num_sdma_queues_per_engine = 8,
 459 };
 460
 461 /* For each entry, [0] is regular and [1] is virtualisation device. */
 462 static const struct kfd_device_info *kfd_supported_devices[][2] = {
 463 #ifdef KFD_SUPPORT_IOMMU_V2
 464         [CHIP_KAVERI] = {&kaveri_device_info, NULL},
 465         [CHIP_CARRIZO] = {&carrizo_device_info, NULL},
 466         [CHIP_RAVEN] = {&raven_device_info, NULL},
 467 #endif
 468         [CHIP_HAWAII] = {&hawaii_device_info, NULL},
 469         [CHIP_TONGA] = {&tonga_device_info, NULL},
 470         [CHIP_FIJI] = {&fiji_device_info, &fiji_vf_device_info},
 471         [CHIP_POLARIS10] = {&polaris10_device_info, &polaris10_vf_device_info},
 472         [CHIP_POLARIS11] = {&polaris11_device_info, NULL},
 473         [CHIP_POLARIS12] = {&polaris12_device_info, NULL},
 474         [CHIP_VEGAM] = {&vegam_device_info, NULL},
 475         [CHIP_VEGA10] = {&vega10_device_info, &vega10_vf_device_info},
 476         [CHIP_VEGA12] = {&vega12_device_info, NULL},
 477         [CHIP_VEGA20] = {&vega20_device_info, NULL},
 478         [CHIP_RENOIR] = {&renoir_device_info, NULL},
 479         [CHIP_ARCTURUS] = {&arcturus_device_info, &arcturus_device_info},
 480         [CHIP_NAVI10] = {&navi10_device_info, NULL},
 481         [CHIP_NAVI12] = {&navi12_device_info, &navi12_device_info},
 482         [CHIP_NAVI14] = {&navi14_device_info, NULL},
 483 };
 484
 485 static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
 486                                 unsigned int chunk_size);
 487 static void kfd_gtt_sa_fini(struct kfd_dev *kfd);
 488
 489 static int kfd_resume(struct kfd_dev *kfd);
 490
 491 struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd,
 492         struct pci_dev *pdev, unsigned int asic_type, bool vf)
 493 {
 494         struct kfd_dev *kfd;
 495         const struct kfd_device_info *device_info;
 496         const struct kfd2kgd_calls *f2g;
 497
 498         if (asic_type >= sizeof(kfd_supported_devices) / (sizeof(void *) * 2)
 499                 || asic_type >= sizeof(kfd2kgd_funcs) / sizeof(void *)) {
 500                 dev_err(kfd_device, "asic_type %d out of range\n", asic_type);
 501                 return NULL; /* asic_type out of range */
 502         }
 503
 504         device_info = kfd_supported_devices[asic_type][vf];
 505         f2g = kfd2kgd_funcs[asic_type];
 506
 507         if (!device_info || !f2g) {
 508                 dev_err(kfd_device, "%s %s not supported in kfd\n",
 509                         amdgpu_asic_name[asic_type], vf ? "VF" : "");
 510                 return NULL;
 511         }
 512
 513         kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);
 514         if (!kfd)
 515                 return NULL;
 516
 517         /* Allow BIF to recode atomics to PCIe 3.0 AtomicOps.
 518          * 32 and 64-bit requests are possible and must be
 519          * supported.
 520          */
 521         kfd->pci_atomic_requested = amdgpu_amdkfd_have_atomics_support(kgd);
 522         if (device_info->needs_pci_atomics &&
 523             !kfd->pci_atomic_requested) {
 524                 dev_info(kfd_device,
 525                          "skipped device %x:%x, PCI rejects atomics\n",
 526                          pdev->vendor, pdev->device);
 527                 kfree(kfd);
 528                 return NULL;
 529         }
 530
 531         kfd->kgd = kgd;
 532         kfd->device_info = device_info;
 533         kfd->pdev = pdev;
 534         kfd->init_complete = false;
 535         kfd->kfd2kgd = f2g;
 536         atomic_set(&kfd->compute_profile, 0);
 537
 538         mutex_init(&kfd->doorbell_mutex);
 539         memset(&kfd->doorbell_available_index, 0,
 540                 sizeof(kfd->doorbell_available_index));
 541
 542         atomic_set(&kfd->sram_ecc_flag, 0);
 543
 544         return kfd;
 545 }
 546
 547 static void kfd_cwsr_init(struct kfd_dev *kfd)
 548 {
 549         if (cwsr_enable && kfd->device_info->supports_cwsr) {
 550                 if (kfd->device_info->asic_family < CHIP_VEGA10) {
 551                         BUILD_BUG_ON(sizeof(cwsr_trap_gfx8_hex) > PAGE_SIZE);
 552                         kfd->cwsr_isa = cwsr_trap_gfx8_hex;
 553                         kfd->cwsr_isa_size = sizeof(cwsr_trap_gfx8_hex);
 554                 } else if (kfd->device_info->asic_family == CHIP_ARCTURUS) {
 555                         BUILD_BUG_ON(sizeof(cwsr_trap_arcturus_hex) > PAGE_SIZE);
 556                         kfd->cwsr_isa = cwsr_trap_arcturus_hex;
 557                         kfd->cwsr_isa_size = sizeof(cwsr_trap_arcturus_hex);
 558                 } else if (kfd->device_info->asic_family < CHIP_NAVI10) {
 559                         BUILD_BUG_ON(sizeof(cwsr_trap_gfx9_hex) > PAGE_SIZE);
 560                         kfd->cwsr_isa = cwsr_trap_gfx9_hex;
 561                         kfd->cwsr_isa_size = sizeof(cwsr_trap_gfx9_hex);
 562                 } else {
 563                         BUILD_BUG_ON(sizeof(cwsr_trap_gfx10_hex) > PAGE_SIZE);
 564                         kfd->cwsr_isa = cwsr_trap_gfx10_hex;
 565                         kfd->cwsr_isa_size = sizeof(cwsr_trap_gfx10_hex);
 566                 }
 567
 568                 kfd->cwsr_enabled = true;
 569         }
 570 }
 571
 572 bool kgd2kfd_device_init(struct kfd_dev *kfd,
 573                          struct drm_device *ddev,
 574                          const struct kgd2kfd_shared_resources *gpu_resources)
 575 {
 576         unsigned int size;
 577
 578         kfd->ddev = ddev;
 579         kfd->mec_fw_version = amdgpu_amdkfd_get_fw_version(kfd->kgd,
 580                         KGD_ENGINE_MEC1);
 581         kfd->sdma_fw_version = amdgpu_amdkfd_get_fw_version(kfd->kgd,
 582                         KGD_ENGINE_SDMA1);
 583         kfd->shared_resources = *gpu_resources;
 584
 585         kfd->vm_info.first_vmid_kfd = ffs(gpu_resources->compute_vmid_bitmap)-1;
 586         kfd->vm_info.last_vmid_kfd = fls(gpu_resources->compute_vmid_bitmap)-1;
 587         kfd->vm_info.vmid_num_kfd = kfd->vm_info.last_vmid_kfd
 588                         - kfd->vm_info.first_vmid_kfd + 1;
 589
 590         /* Verify module parameters regarding mapped process number*/
 591         if ((hws_max_conc_proc < 0)
 592                         || (hws_max_conc_proc > kfd->vm_info.vmid_num_kfd)) {
 593                 dev_err(kfd_device,
 594                         "hws_max_conc_proc %d must be between 0 and %d, use %d instead\n",
 595                         hws_max_conc_proc, kfd->vm_info.vmid_num_kfd,
 596                         kfd->vm_info.vmid_num_kfd);
 597                 kfd->max_proc_per_quantum = kfd->vm_info.vmid_num_kfd;
 598         } else
 599                 kfd->max_proc_per_quantum = hws_max_conc_proc;
 600
 601         /* Allocate global GWS that is shared by all KFD processes */
 602         if (hws_gws_support && amdgpu_amdkfd_alloc_gws(kfd->kgd,
 603                         amdgpu_amdkfd_get_num_gws(kfd->kgd), &kfd->gws)) {
 604                 dev_err(kfd_device, "Could not allocate %d gws\n",
 605                         amdgpu_amdkfd_get_num_gws(kfd->kgd));
 606                 goto out;
 607         }
 608         /* calculate max size of mqds needed for queues */
 609         size = max_num_of_queues_per_device *
 610                         kfd->device_info->mqd_size_aligned;
 611
 612         /*
 613          * calculate max size of runlist packet.
 614          * There can be only 2 packets at once
 615          */
 616         size += (KFD_MAX_NUM_OF_PROCESSES * sizeof(struct pm4_mes_map_process) +
 617                 max_num_of_queues_per_device * sizeof(struct pm4_mes_map_queues)
 618                 + sizeof(struct pm4_mes_runlist)) * 2;
 619
 620         /* Add size of HIQ & DIQ */
 621         size += KFD_KERNEL_QUEUE_SIZE * 2;
 622
 623         /* add another 512KB for all other allocations on gart (HPD, fences) */
 624         size += 512 * 1024;
 625
 626         if (amdgpu_amdkfd_alloc_gtt_mem(
 627                         kfd->kgd, size, &kfd->gtt_mem,
 628                         &kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr,
 629                         false)) {
 630                 dev_err(kfd_device, "Could not allocate %d bytes\n", size);
 631                 goto alloc_gtt_mem_failure;
 632         }
 633
 634         dev_info(kfd_device, "Allocated %d bytes on gart\n", size);
 635
 636         /* Initialize GTT sa with 512 byte chunk size */
 637         if (kfd_gtt_sa_init(kfd, size, 512) != 0) {
 638                 dev_err(kfd_device, "Error initializing gtt sub-allocator\n");
 639                 goto kfd_gtt_sa_init_error;
 640         }
 641
 642         if (kfd_doorbell_init(kfd)) {
 643                 dev_err(kfd_device,
 644                         "Error initializing doorbell aperture\n");
 645                 goto kfd_doorbell_error;
 646         }
 647
 648         if (kfd->kfd2kgd->get_hive_id)
 649                 kfd->hive_id = kfd->kfd2kgd->get_hive_id(kfd->kgd);
 650
 651         if (kfd_interrupt_init(kfd)) {
 652                 dev_err(kfd_device, "Error initializing interrupts\n");
 653                 goto kfd_interrupt_error;
 654         }
 655
 656         kfd->dqm = device_queue_manager_init(kfd);
 657         if (!kfd->dqm) {
 658                 dev_err(kfd_device, "Error initializing queue manager\n");
 659                 goto device_queue_manager_error;
 660         }
 661
 662         if (kfd_iommu_device_init(kfd)) {
 663                 dev_err(kfd_device, "Error initializing iommuv2\n");
 664                 goto device_iommu_error;
 665         }
 666
 667         kfd_cwsr_init(kfd);
 668
 669         if (kfd_resume(kfd))
 670                 goto kfd_resume_error;
 671
 672         kfd->dbgmgr = NULL;
 673
 674         if (kfd_topology_add_device(kfd)) {
 675                 dev_err(kfd_device, "Error adding device to topology\n");
 676                 goto kfd_topology_add_device_error;
 677         }
 678
 679         kfd->init_complete = true;
 680         dev_info(kfd_device, "added device %x:%x\n", kfd->pdev->vendor,
 681                  kfd->pdev->device);
 682
 683         pr_debug("Starting kfd with the following scheduling policy %d\n",
 684                 kfd->dqm->sched_policy);
 685
 686         goto out;
 687
 688 kfd_topology_add_device_error:
 689 kfd_resume_error:
 690 device_iommu_error:
 691         device_queue_manager_uninit(kfd->dqm);
 692 device_queue_manager_error:
 693         kfd_interrupt_exit(kfd);
 694 kfd_interrupt_error:
 695         kfd_doorbell_fini(kfd);
 696 kfd_doorbell_error:
 697         kfd_gtt_sa_fini(kfd);
 698 kfd_gtt_sa_init_error:
 699         amdgpu_amdkfd_free_gtt_mem(kfd->kgd, kfd->gtt_mem);
 700 alloc_gtt_mem_failure:
 701         if (hws_gws_support)
 702                 amdgpu_amdkfd_free_gws(kfd->kgd, kfd->gws);
 703         dev_err(kfd_device,
 704                 "device %x:%x NOT added due to errors\n",
 705                 kfd->pdev->vendor, kfd->pdev->device);
 706 out:
 707         return kfd->init_complete;
 708 }
 709
 710 void kgd2kfd_device_exit(struct kfd_dev *kfd)
 711 {
 712         if (kfd->init_complete) {
 713                 kgd2kfd_suspend(kfd);
 714                 device_queue_manager_uninit(kfd->dqm);
 715                 kfd_interrupt_exit(kfd);
 716                 kfd_topology_remove_device(kfd);
 717                 kfd_doorbell_fini(kfd);
 718                 kfd_gtt_sa_fini(kfd);
 719                 amdgpu_amdkfd_free_gtt_mem(kfd->kgd, kfd->gtt_mem);
 720                 if (hws_gws_support)
 721                         amdgpu_amdkfd_free_gws(kfd->kgd, kfd->gws);
 722         }
 723
 724         kfree(kfd);
 725 }
 726
 727 int kgd2kfd_pre_reset(struct kfd_dev *kfd)
 728 {
 729         if (!kfd->init_complete)
 730                 return 0;
 731         kgd2kfd_suspend(kfd);
 732
 733         /* hold dqm->lock to prevent further execution*/
 734         dqm_lock(kfd->dqm);
 735
 736         kfd_signal_reset_event(kfd);
 737         return 0;
 738 }
 739
 740 /*
 741  * Fix me. KFD won't be able to resume existing process for now.
 742  * We will keep all existing process in a evicted state and
 743  * wait the process to be terminated.
 744  */
 745
 746 int kgd2kfd_post_reset(struct kfd_dev *kfd)
 747 {
 748         int ret, count;
 749
 750         if (!kfd->init_complete)
 751                 return 0;
 752
 753         dqm_unlock(kfd->dqm);
 754
 755         ret = kfd_resume(kfd);
 756         if (ret)
 757                 return ret;
 758         count = atomic_dec_return(&kfd_locked);
 759
 760         atomic_set(&kfd->sram_ecc_flag, 0);
 761
 762         return 0;
 763 }
 764
 765 bool kfd_is_locked(void)
 766 {
 767         return  (atomic_read(&kfd_locked) > 0);
 768 }
 769
 770 void kgd2kfd_suspend(struct kfd_dev *kfd)
 771 {
 772         if (!kfd->init_complete)
 773                 return;
 774
 775         /* For first KFD device suspend all the KFD processes */
 776         if (atomic_inc_return(&kfd_locked) == 1)
 777                 kfd_suspend_all_processes();
 778
 779         kfd->dqm->ops.stop(kfd->dqm);
 780
 781         kfd_iommu_suspend(kfd);
 782 }
 783
 784 int kgd2kfd_resume(struct kfd_dev *kfd)
 785 {
 786         int ret, count;
 787
 788         if (!kfd->init_complete)
 789                 return 0;
 790
 791         ret = kfd_resume(kfd);
 792         if (ret)
 793                 return ret;
 794
 795         count = atomic_dec_return(&kfd_locked);
 796         WARN_ONCE(count < 0, "KFD suspend / resume ref. error");
 797         if (count == 0)
 798                 ret = kfd_resume_all_processes();
 799
 800         return ret;
 801 }
 802
 803 static int kfd_resume(struct kfd_dev *kfd)
 804 {
 805         int err = 0;
 806
 807         err = kfd_iommu_resume(kfd);
 808         if (err) {
 809                 dev_err(kfd_device,
 810                         "Failed to resume IOMMU for device %x:%x\n",
 811                         kfd->pdev->vendor, kfd->pdev->device);
 812                 return err;
 813         }
 814
 815         err = kfd->dqm->ops.start(kfd->dqm);
 816         if (err) {
 817                 dev_err(kfd_device,
 818                         "Error starting queue manager for device %x:%x\n",
 819                         kfd->pdev->vendor, kfd->pdev->device);
 820                 goto dqm_start_error;
 821         }
 822
 823         return err;
 824
 825 dqm_start_error:
 826         kfd_iommu_suspend(kfd);
 827         return err;
 828 }
 829
 830 /* This is called directly from KGD at ISR. */
 831 void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
 832 {
 833         uint32_t patched_ihre[KFD_MAX_RING_ENTRY_SIZE];
 834         bool is_patched = false;
 835         unsigned long flags;
 836
 837         if (!kfd->init_complete)
 838                 return;
 839
 840         if (kfd->device_info->ih_ring_entry_size > sizeof(patched_ihre)) {
 841                 dev_err_once(kfd_device, "Ring entry too small\n");
 842                 return;
 843         }
 844
 845         spin_lock_irqsave(&kfd->interrupt_lock, flags);
 846
 847         if (kfd->interrupts_active
 848             && interrupt_is_wanted(kfd, ih_ring_entry,
 849                                    patched_ihre, &is_patched)
 850             && enqueue_ih_ring_entry(kfd,
 851                                      is_patched ? patched_ihre : ih_ring_entry))
 852                 queue_work(kfd->ih_wq, &kfd->interrupt_work);
 853
 854         spin_unlock_irqrestore(&kfd->interrupt_lock, flags);
 855 }
 856
 857 int kgd2kfd_quiesce_mm(struct mm_struct *mm)
 858 {
 859         struct kfd_process *p;
 860         int r;
 861
 862         /* Because we are called from arbitrary context (workqueue) as opposed
 863          * to process context, kfd_process could attempt to exit while we are
 864          * running so the lookup function increments the process ref count.
 865          */
 866         p = kfd_lookup_process_by_mm(mm);
 867         if (!p)
 868                 return -ESRCH;
 869
 870         r = kfd_process_evict_queues(p);
 871
 872         kfd_unref_process(p);
 873         return r;
 874 }
 875
 876 int kgd2kfd_resume_mm(struct mm_struct *mm)
 877 {
 878         struct kfd_process *p;
 879         int r;
 880
 881         /* Because we are called from arbitrary context (workqueue) as opposed
 882          * to process context, kfd_process could attempt to exit while we are
 883          * running so the lookup function increments the process ref count.
 884          */
 885         p = kfd_lookup_process_by_mm(mm);
 886         if (!p)
 887                 return -ESRCH;
 888
 889         r = kfd_process_restore_queues(p);
 890
 891         kfd_unref_process(p);
 892         return r;
 893 }
 894
 895 /** kgd2kfd_schedule_evict_and_restore_process - Schedules work queue that will
 896  *   prepare for safe eviction of KFD BOs that belong to the specified
 897  *   process.
 898  *
 899  * @mm: mm_struct that identifies the specified KFD process
 900  * @fence: eviction fence attached to KFD process BOs
 901  *
 902  */
 903 int kgd2kfd_schedule_evict_and_restore_process(struct mm_struct *mm,
 904                                                struct dma_fence *fence)
 905 {
 906         struct kfd_process *p;
 907         unsigned long active_time;
 908         unsigned long delay_jiffies = msecs_to_jiffies(PROCESS_ACTIVE_TIME_MS);
 909
 910         if (!fence)
 911                 return -EINVAL;
 912
 913         if (dma_fence_is_signaled(fence))
 914                 return 0;
 915
 916         p = kfd_lookup_process_by_mm(mm);
 917         if (!p)
 918                 return -ENODEV;
 919
 920         if (fence->seqno == p->last_eviction_seqno)
 921                 goto out;
 922
 923         p->last_eviction_seqno = fence->seqno;
 924
 925         /* Avoid KFD process starvation. Wait for at least
 926          * PROCESS_ACTIVE_TIME_MS before evicting the process again
 927          */
 928         active_time = get_jiffies_64() - p->last_restore_timestamp;
 929         if (delay_jiffies > active_time)
 930                 delay_jiffies -= active_time;
 931         else
 932                 delay_jiffies = 0;
 933
 934         /* During process initialization eviction_work.dwork is initialized
 935          * to kfd_evict_bo_worker
 936          */
 937         schedule_delayed_work(&p->eviction_work, delay_jiffies);
 938 out:
 939         kfd_unref_process(p);
 940         return 0;
 941 }
 942
 943 static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
 944                                 unsigned int chunk_size)
 945 {
 946         unsigned int num_of_longs;
 947
 948         if (WARN_ON(buf_size < chunk_size))
 949                 return -EINVAL;
 950         if (WARN_ON(buf_size == 0))
 951                 return -EINVAL;
 952         if (WARN_ON(chunk_size == 0))
 953                 return -EINVAL;
 954
 955         kfd->gtt_sa_chunk_size = chunk_size;
 956         kfd->gtt_sa_num_of_chunks = buf_size / chunk_size;
 957
 958         num_of_longs = (kfd->gtt_sa_num_of_chunks + BITS_PER_LONG - 1) /
 959                 BITS_PER_LONG;
 960
 961         kfd->gtt_sa_bitmap = kcalloc(num_of_longs, sizeof(long), GFP_KERNEL);
 962
 963         if (!kfd->gtt_sa_bitmap)
 964                 return -ENOMEM;
 965
 966         pr_debug("gtt_sa_num_of_chunks = %d, gtt_sa_bitmap = %p\n",
 967                         kfd->gtt_sa_num_of_chunks, kfd->gtt_sa_bitmap);
 968
 969         mutex_init(&kfd->gtt_sa_lock);
 970
 971         return 0;
 972
 973 }
 974
 975 static void kfd_gtt_sa_fini(struct kfd_dev *kfd)
 976 {
 977         mutex_destroy(&kfd->gtt_sa_lock);
 978         kfree(kfd->gtt_sa_bitmap);
 979 }
 980
 981 static inline uint64_t kfd_gtt_sa_calc_gpu_addr(uint64_t start_addr,
 982                                                 unsigned int bit_num,
 983                                                 unsigned int chunk_size)
 984 {
 985         return start_addr + bit_num * chunk_size;
 986 }
 987
 988 static inline uint32_t *kfd_gtt_sa_calc_cpu_addr(void *start_addr,
 989                                                 unsigned int bit_num,
 990                                                 unsigned int chunk_size)
 991 {
 992         return (uint32_t *) ((uint64_t) start_addr + bit_num * chunk_size);
 993 }
 994
 995 int kfd_gtt_sa_allocate(struct kfd_dev *kfd, unsigned int size,
 996                         struct kfd_mem_obj **mem_obj)
 997 {
 998         unsigned int found, start_search, cur_size;
 999
1000         if (size == 0)
1001                 return -EINVAL;
1002
1003         if (size > kfd->gtt_sa_num_of_chunks * kfd->gtt_sa_chunk_size)
1004                 return -ENOMEM;
1005
1006         *mem_obj = kzalloc(sizeof(struct kfd_mem_obj), GFP_KERNEL);
1007         if (!(*mem_obj))
1008                 return -ENOMEM;
1009
1010         pr_debug("Allocated mem_obj = %p for size = %d\n", *mem_obj, size);
1011
1012         start_search = 0;
1013
1014         mutex_lock(&kfd->gtt_sa_lock);
1015
1016 kfd_gtt_restart_search:
1017         /* Find the first chunk that is free */
1018         found = find_next_zero_bit(kfd->gtt_sa_bitmap,
1019                                         kfd->gtt_sa_num_of_chunks,
1020                                         start_search);
1021
1022         pr_debug("Found = %d\n", found);
1023
1024         /* If there wasn't any free chunk, bail out */
1025         if (found == kfd->gtt_sa_num_of_chunks)
1026                 goto kfd_gtt_no_free_chunk;
1027
1028         /* Update fields of mem_obj */
1029         (*mem_obj)->range_start = found;
1030         (*mem_obj)->range_end = found;
1031         (*mem_obj)->gpu_addr = kfd_gtt_sa_calc_gpu_addr(
1032                                         kfd->gtt_start_gpu_addr,
1033                                         found,
1034                                         kfd->gtt_sa_chunk_size);
1035         (*mem_obj)->cpu_ptr = kfd_gtt_sa_calc_cpu_addr(
1036                                         kfd->gtt_start_cpu_ptr,
1037                                         found,
1038                                         kfd->gtt_sa_chunk_size);
1039
1040         pr_debug("gpu_addr = %p, cpu_addr = %p\n",
1041                         (uint64_t *) (*mem_obj)->gpu_addr, (*mem_obj)->cpu_ptr);
1042
1043         /* If we need only one chunk, mark it as allocated and get out */
1044         if (size <= kfd->gtt_sa_chunk_size) {
1045                 pr_debug("Single bit\n");
1046                 set_bit(found, kfd->gtt_sa_bitmap);
1047                 goto kfd_gtt_out;
1048         }
1049
1050         /* Otherwise, try to see if we have enough contiguous chunks */
1051         cur_size = size - kfd->gtt_sa_chunk_size;
1052         do {
1053                 (*mem_obj)->range_end =
1054                         find_next_zero_bit(kfd->gtt_sa_bitmap,
1055                                         kfd->gtt_sa_num_of_chunks, ++found);
1056                 /*
1057                  * If next free chunk is not contiguous than we need to
1058                  * restart our search from the last free chunk we found (which
1059                  * wasn't contiguous to the previous ones
1060                  */
1061                 if ((*mem_obj)->range_end != found) {
1062                         start_search = found;
1063                         goto kfd_gtt_restart_search;
1064                 }
1065
1066                 /*
1067                  * If we reached end of buffer, bail out with error
1068                  */
1069                 if (found == kfd->gtt_sa_num_of_chunks)
1070                         goto kfd_gtt_no_free_chunk;
1071
1072                 /* Check if we don't need another chunk */
1073                 if (cur_size <= kfd->gtt_sa_chunk_size)
1074                         cur_size = 0;
1075                 else
1076                         cur_size -= kfd->gtt_sa_chunk_size;
1077
1078         } while (cur_size > 0);
1079
1080         pr_debug("range_start = %d, range_end = %d\n",
1081                 (*mem_obj)->range_start, (*mem_obj)->range_end);
1082
1083         /* Mark the chunks as allocated */
1084         for (found = (*mem_obj)->range_start;
1085                 found <= (*mem_obj)->range_end;
1086                 found++)
1087                 set_bit(found, kfd->gtt_sa_bitmap);
1088
1089 kfd_gtt_out:
1090         mutex_unlock(&kfd->gtt_sa_lock);
1091         return 0;
1092
1093 kfd_gtt_no_free_chunk:
1094         pr_debug("Allocation failed with mem_obj = %p\n", mem_obj);
1095         mutex_unlock(&kfd->gtt_sa_lock);
1096         kfree(mem_obj);
1097         return -ENOMEM;
1098 }
1099
1100 int kfd_gtt_sa_free(struct kfd_dev *kfd, struct kfd_mem_obj *mem_obj)
1101 {
1102         unsigned int bit;
1103
1104         /* Act like kfree when trying to free a NULL object */
1105         if (!mem_obj)
1106                 return 0;
1107
1108         pr_debug("Free mem_obj = %p, range_start = %d, range_end = %d\n",
1109                         mem_obj, mem_obj->range_start, mem_obj->range_end);
1110
1111         mutex_lock(&kfd->gtt_sa_lock);
1112
1113         /* Mark the chunks as free */
1114         for (bit = mem_obj->range_start;
1115                 bit <= mem_obj->range_end;
1116                 bit++)
1117                 clear_bit(bit, kfd->gtt_sa_bitmap);
1118
1119         mutex_unlock(&kfd->gtt_sa_lock);
1120
1121         kfree(mem_obj);
1122         return 0;
1123 }
1124
1125 void kgd2kfd_set_sram_ecc_flag(struct kfd_dev *kfd)
1126 {
1127         if (kfd)
1128                 atomic_inc(&kfd->sram_ecc_flag);
1129 }
1130
1131 void kfd_inc_compute_active(struct kfd_dev *kfd)
1132 {
1133         if (atomic_inc_return(&kfd->compute_profile) == 1)
1134                 amdgpu_amdkfd_set_compute_idle(kfd->kgd, false);
1135 }
1136
1137 void kfd_dec_compute_active(struct kfd_dev *kfd)
1138 {
1139         int count = atomic_dec_return(&kfd->compute_profile);
1140
1141         if (count == 0)
1142                 amdgpu_amdkfd_set_compute_idle(kfd->kgd, true);
1143         WARN_ONCE(count < 0, "Compute profile ref. count error");
1144 }
1145
1146 #if defined(CONFIG_DEBUG_FS)
1147
1148 /* This function will send a package to HIQ to hang the HWS
1149  * which will trigger a GPU reset and bring the HWS back to normal state
1150  */
1151 int kfd_debugfs_hang_hws(struct kfd_dev *dev)
1152 {
1153         int r = 0;
1154
1155         if (dev->dqm->sched_policy != KFD_SCHED_POLICY_HWS) {
1156                 pr_err("HWS is not enabled");
1157                 return -EINVAL;
1158         }
1159
1160         r = pm_debugfs_hang_hws(&dev->dqm->packets);
1161         if (!r)
1162                 r = dqm_debugfs_execute_queues(dev->dqm);
1163
1164         return r;
1165 }
1166
1167 #endif