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
  32 #define MQD_SIZE_ALIGNED 768
  33
  34 /*
  35  * kfd_locked is used to lock the kfd driver during suspend or reset
  36  * once locked, kfd driver will stop any further GPU execution.
  37  * create process (open) will return -EAGAIN.
  38  */
  39 static atomic_t kfd_locked = ATOMIC_INIT(0);
  40
  41 #ifdef KFD_SUPPORT_IOMMU_V2
  42 static const struct kfd_device_info kaveri_device_info = {
  43         .asic_family = CHIP_KAVERI,
  44         .max_pasid_bits = 16,
  45         /* max num of queues for KV.TODO should be a dynamic value */
  46         .max_no_of_hqd  = 24,
  47         .doorbell_size  = 4,
  48         .ih_ring_entry_size = 4 * sizeof(uint32_t),
  49         .event_interrupt_class = &event_interrupt_class_cik,
  50         .num_of_watch_points = 4,
  51         .mqd_size_aligned = MQD_SIZE_ALIGNED,
  52         .supports_cwsr = false,
  53         .needs_iommu_device = true,
  54         .needs_pci_atomics = false,
  55         .num_sdma_engines = 2,
  56 };
  57
  58 static const struct kfd_device_info carrizo_device_info = {
  59         .asic_family = CHIP_CARRIZO,
  60         .max_pasid_bits = 16,
  61         /* max num of queues for CZ.TODO should be a dynamic value */
  62         .max_no_of_hqd  = 24,
  63         .doorbell_size  = 4,
  64         .ih_ring_entry_size = 4 * sizeof(uint32_t),
  65         .event_interrupt_class = &event_interrupt_class_cik,
  66         .num_of_watch_points = 4,
  67         .mqd_size_aligned = MQD_SIZE_ALIGNED,
  68         .supports_cwsr = true,
  69         .needs_iommu_device = true,
  70         .needs_pci_atomics = false,
  71         .num_sdma_engines = 2,
  72 };
  73
  74 static const struct kfd_device_info raven_device_info = {
  75         .asic_family = CHIP_RAVEN,
  76         .max_pasid_bits = 16,
  77         .max_no_of_hqd  = 24,
  78         .doorbell_size  = 8,
  79         .ih_ring_entry_size = 8 * sizeof(uint32_t),
  80         .event_interrupt_class = &event_interrupt_class_v9,
  81         .num_of_watch_points = 4,
  82         .mqd_size_aligned = MQD_SIZE_ALIGNED,
  83         .supports_cwsr = true,
  84         .needs_iommu_device = true,
  85         .needs_pci_atomics = true,
  86         .num_sdma_engines = 1,
  87 };
  88 #endif
  89
  90 static const struct kfd_device_info hawaii_device_info = {
  91         .asic_family = CHIP_HAWAII,
  92         .max_pasid_bits = 16,
  93         /* max num of queues for KV.TODO should be a dynamic value */
  94         .max_no_of_hqd  = 24,
  95         .doorbell_size  = 4,
  96         .ih_ring_entry_size = 4 * sizeof(uint32_t),
  97         .event_interrupt_class = &event_interrupt_class_cik,
  98         .num_of_watch_points = 4,
  99         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 100         .supports_cwsr = false,
 101         .needs_iommu_device = false,
 102         .needs_pci_atomics = false,
 103         .num_sdma_engines = 2,
 104 };
 105
 106 static const struct kfd_device_info tonga_device_info = {
 107         .asic_family = CHIP_TONGA,
 108         .max_pasid_bits = 16,
 109         .max_no_of_hqd  = 24,
 110         .doorbell_size  = 4,
 111         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 112         .event_interrupt_class = &event_interrupt_class_cik,
 113         .num_of_watch_points = 4,
 114         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 115         .supports_cwsr = false,
 116         .needs_iommu_device = false,
 117         .needs_pci_atomics = true,
 118         .num_sdma_engines = 2,
 119 };
 120
 121 static const struct kfd_device_info tonga_vf_device_info = {
 122         .asic_family = CHIP_TONGA,
 123         .max_pasid_bits = 16,
 124         .max_no_of_hqd  = 24,
 125         .doorbell_size  = 4,
 126         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 127         .event_interrupt_class = &event_interrupt_class_cik,
 128         .num_of_watch_points = 4,
 129         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 130         .supports_cwsr = false,
 131         .needs_iommu_device = false,
 132         .needs_pci_atomics = false,
 133         .num_sdma_engines = 2,
 134 };
 135
 136 static const struct kfd_device_info fiji_device_info = {
 137         .asic_family = CHIP_FIJI,
 138         .max_pasid_bits = 16,
 139         .max_no_of_hqd  = 24,
 140         .doorbell_size  = 4,
 141         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 142         .event_interrupt_class = &event_interrupt_class_cik,
 143         .num_of_watch_points = 4,
 144         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 145         .supports_cwsr = true,
 146         .needs_iommu_device = false,
 147         .needs_pci_atomics = true,
 148         .num_sdma_engines = 2,
 149 };
 150
 151 static const struct kfd_device_info fiji_vf_device_info = {
 152         .asic_family = CHIP_FIJI,
 153         .max_pasid_bits = 16,
 154         .max_no_of_hqd  = 24,
 155         .doorbell_size  = 4,
 156         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 157         .event_interrupt_class = &event_interrupt_class_cik,
 158         .num_of_watch_points = 4,
 159         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 160         .supports_cwsr = true,
 161         .needs_iommu_device = false,
 162         .needs_pci_atomics = false,
 163         .num_sdma_engines = 2,
 164 };
 165
 166
 167 static const struct kfd_device_info polaris10_device_info = {
 168         .asic_family = CHIP_POLARIS10,
 169         .max_pasid_bits = 16,
 170         .max_no_of_hqd  = 24,
 171         .doorbell_size  = 4,
 172         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 173         .event_interrupt_class = &event_interrupt_class_cik,
 174         .num_of_watch_points = 4,
 175         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 176         .supports_cwsr = true,
 177         .needs_iommu_device = false,
 178         .needs_pci_atomics = true,
 179         .num_sdma_engines = 2,
 180 };
 181
 182 static const struct kfd_device_info polaris10_vf_device_info = {
 183         .asic_family = CHIP_POLARIS10,
 184         .max_pasid_bits = 16,
 185         .max_no_of_hqd  = 24,
 186         .doorbell_size  = 4,
 187         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 188         .event_interrupt_class = &event_interrupt_class_cik,
 189         .num_of_watch_points = 4,
 190         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 191         .supports_cwsr = true,
 192         .needs_iommu_device = false,
 193         .needs_pci_atomics = false,
 194         .num_sdma_engines = 2,
 195 };
 196
 197 static const struct kfd_device_info polaris11_device_info = {
 198         .asic_family = CHIP_POLARIS11,
 199         .max_pasid_bits = 16,
 200         .max_no_of_hqd  = 24,
 201         .doorbell_size  = 4,
 202         .ih_ring_entry_size = 4 * sizeof(uint32_t),
 203         .event_interrupt_class = &event_interrupt_class_cik,
 204         .num_of_watch_points = 4,
 205         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 206         .supports_cwsr = true,
 207         .needs_iommu_device = false,
 208         .needs_pci_atomics = true,
 209         .num_sdma_engines = 2,
 210 };
 211
 212 static const struct kfd_device_info vega10_device_info = {
 213         .asic_family = CHIP_VEGA10,
 214         .max_pasid_bits = 16,
 215         .max_no_of_hqd  = 24,
 216         .doorbell_size  = 8,
 217         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 218         .event_interrupt_class = &event_interrupt_class_v9,
 219         .num_of_watch_points = 4,
 220         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 221         .supports_cwsr = true,
 222         .needs_iommu_device = false,
 223         .needs_pci_atomics = false,
 224         .num_sdma_engines = 2,
 225 };
 226
 227 static const struct kfd_device_info vega10_vf_device_info = {
 228         .asic_family = CHIP_VEGA10,
 229         .max_pasid_bits = 16,
 230         .max_no_of_hqd  = 24,
 231         .doorbell_size  = 8,
 232         .ih_ring_entry_size = 8 * sizeof(uint32_t),
 233         .event_interrupt_class = &event_interrupt_class_v9,
 234         .num_of_watch_points = 4,
 235         .mqd_size_aligned = MQD_SIZE_ALIGNED,
 236         .supports_cwsr = true,
 237         .needs_iommu_device = false,
 238         .needs_pci_atomics = false,
 239         .num_sdma_engines = 2,
 240 };
 241
 242
 243 struct kfd_deviceid {
 244         unsigned short did;
 245         const struct kfd_device_info *device_info;
 246 };
 247
 248 static const struct kfd_deviceid supported_devices[] = {
 249 #ifdef KFD_SUPPORT_IOMMU_V2
 250         { 0x1304, &kaveri_device_info },        /* Kaveri */
 251         { 0x1305, &kaveri_device_info },        /* Kaveri */
 252         { 0x1306, &kaveri_device_info },        /* Kaveri */
 253         { 0x1307, &kaveri_device_info },        /* Kaveri */
 254         { 0x1309, &kaveri_device_info },        /* Kaveri */
 255         { 0x130A, &kaveri_device_info },        /* Kaveri */
 256         { 0x130B, &kaveri_device_info },        /* Kaveri */
 257         { 0x130C, &kaveri_device_info },        /* Kaveri */
 258         { 0x130D, &kaveri_device_info },        /* Kaveri */
 259         { 0x130E, &kaveri_device_info },        /* Kaveri */
 260         { 0x130F, &kaveri_device_info },        /* Kaveri */
 261         { 0x1310, &kaveri_device_info },        /* Kaveri */
 262         { 0x1311, &kaveri_device_info },        /* Kaveri */
 263         { 0x1312, &kaveri_device_info },        /* Kaveri */
 264         { 0x1313, &kaveri_device_info },        /* Kaveri */
 265         { 0x1315, &kaveri_device_info },        /* Kaveri */
 266         { 0x1316, &kaveri_device_info },        /* Kaveri */
 267         { 0x1317, &kaveri_device_info },        /* Kaveri */
 268         { 0x1318, &kaveri_device_info },        /* Kaveri */
 269         { 0x131B, &kaveri_device_info },        /* Kaveri */
 270         { 0x131C, &kaveri_device_info },        /* Kaveri */
 271         { 0x131D, &kaveri_device_info },        /* Kaveri */
 272         { 0x9870, &carrizo_device_info },       /* Carrizo */
 273         { 0x9874, &carrizo_device_info },       /* Carrizo */
 274         { 0x9875, &carrizo_device_info },       /* Carrizo */
 275         { 0x9876, &carrizo_device_info },       /* Carrizo */
 276         { 0x9877, &carrizo_device_info },       /* Carrizo */
 277         { 0x15DD, &raven_device_info },         /* Raven */
 278 #endif
 279         { 0x67A0, &hawaii_device_info },        /* Hawaii */
 280         { 0x67A1, &hawaii_device_info },        /* Hawaii */
 281         { 0x67A2, &hawaii_device_info },        /* Hawaii */
 282         { 0x67A8, &hawaii_device_info },        /* Hawaii */
 283         { 0x67A9, &hawaii_device_info },        /* Hawaii */
 284         { 0x67AA, &hawaii_device_info },        /* Hawaii */
 285         { 0x67B0, &hawaii_device_info },        /* Hawaii */
 286         { 0x67B1, &hawaii_device_info },        /* Hawaii */
 287         { 0x67B8, &hawaii_device_info },        /* Hawaii */
 288         { 0x67B9, &hawaii_device_info },        /* Hawaii */
 289         { 0x67BA, &hawaii_device_info },        /* Hawaii */
 290         { 0x67BE, &hawaii_device_info },        /* Hawaii */
 291         { 0x6920, &tonga_device_info },         /* Tonga */
 292         { 0x6921, &tonga_device_info },         /* Tonga */
 293         { 0x6928, &tonga_device_info },         /* Tonga */
 294         { 0x6929, &tonga_device_info },         /* Tonga */
 295         { 0x692B, &tonga_device_info },         /* Tonga */
 296         { 0x692F, &tonga_vf_device_info },      /* Tonga vf */
 297         { 0x6938, &tonga_device_info },         /* Tonga */
 298         { 0x6939, &tonga_device_info },         /* Tonga */
 299         { 0x7300, &fiji_device_info },          /* Fiji */
 300         { 0x730F, &fiji_vf_device_info },       /* Fiji vf*/
 301         { 0x67C0, &polaris10_device_info },     /* Polaris10 */
 302         { 0x67C1, &polaris10_device_info },     /* Polaris10 */
 303         { 0x67C2, &polaris10_device_info },     /* Polaris10 */
 304         { 0x67C4, &polaris10_device_info },     /* Polaris10 */
 305         { 0x67C7, &polaris10_device_info },     /* Polaris10 */
 306         { 0x67C8, &polaris10_device_info },     /* Polaris10 */
 307         { 0x67C9, &polaris10_device_info },     /* Polaris10 */
 308         { 0x67CA, &polaris10_device_info },     /* Polaris10 */
 309         { 0x67CC, &polaris10_device_info },     /* Polaris10 */
 310         { 0x67CF, &polaris10_device_info },     /* Polaris10 */
 311         { 0x67D0, &polaris10_vf_device_info },  /* Polaris10 vf*/
 312         { 0x67DF, &polaris10_device_info },     /* Polaris10 */
 313         { 0x67E0, &polaris11_device_info },     /* Polaris11 */
 314         { 0x67E1, &polaris11_device_info },     /* Polaris11 */
 315         { 0x67E3, &polaris11_device_info },     /* Polaris11 */
 316         { 0x67E7, &polaris11_device_info },     /* Polaris11 */
 317         { 0x67E8, &polaris11_device_info },     /* Polaris11 */
 318         { 0x67E9, &polaris11_device_info },     /* Polaris11 */
 319         { 0x67EB, &polaris11_device_info },     /* Polaris11 */
 320         { 0x67EF, &polaris11_device_info },     /* Polaris11 */
 321         { 0x67FF, &polaris11_device_info },     /* Polaris11 */
 322         { 0x6860, &vega10_device_info },        /* Vega10 */
 323         { 0x6861, &vega10_device_info },        /* Vega10 */
 324         { 0x6862, &vega10_device_info },        /* Vega10 */
 325         { 0x6863, &vega10_device_info },        /* Vega10 */
 326         { 0x6864, &vega10_device_info },        /* Vega10 */
 327         { 0x6867, &vega10_device_info },        /* Vega10 */
 328         { 0x6868, &vega10_device_info },        /* Vega10 */
 329         { 0x686C, &vega10_vf_device_info },     /* Vega10  vf*/
 330         { 0x687F, &vega10_device_info },        /* Vega10 */
 331 };
 332
 333 static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
 334                                 unsigned int chunk_size);
 335 static void kfd_gtt_sa_fini(struct kfd_dev *kfd);
 336
 337 static int kfd_resume(struct kfd_dev *kfd);
 338
 339 static const struct kfd_device_info *lookup_device_info(unsigned short did)
 340 {
 341         size_t i;
 342
 343         for (i = 0; i < ARRAY_SIZE(supported_devices); i++) {
 344                 if (supported_devices[i].did == did) {
 345                         WARN_ON(!supported_devices[i].device_info);
 346                         return supported_devices[i].device_info;
 347                 }
 348         }
 349
 350         dev_warn(kfd_device, "DID %04x is missing in supported_devices\n",
 351                  did);
 352
 353         return NULL;
 354 }
 355
 356 struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd,
 357         struct pci_dev *pdev, const struct kfd2kgd_calls *f2g)
 358 {
 359         struct kfd_dev *kfd;
 360         int ret;
 361         const struct kfd_device_info *device_info =
 362                                         lookup_device_info(pdev->device);
 363
 364         if (!device_info) {
 365                 dev_err(kfd_device, "kgd2kfd_probe failed\n");
 366                 return NULL;
 367         }
 368
 369         /* Allow BIF to recode atomics to PCIe 3.0 AtomicOps.
 370          * 32 and 64-bit requests are possible and must be
 371          * supported.
 372          */
 373         ret = pci_enable_atomic_ops_to_root(pdev,
 374                         PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
 375                         PCI_EXP_DEVCAP2_ATOMIC_COMP64);
 376         if (device_info->needs_pci_atomics && ret < 0) {
 377                 dev_info(kfd_device,
 378                          "skipped device %x:%x, PCI rejects atomics\n",
 379                          pdev->vendor, pdev->device);
 380                 return NULL;
 381         }
 382
 383         kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);
 384         if (!kfd)
 385                 return NULL;
 386
 387         kfd->kgd = kgd;
 388         kfd->device_info = device_info;
 389         kfd->pdev = pdev;
 390         kfd->init_complete = false;
 391         kfd->kfd2kgd = f2g;
 392
 393         mutex_init(&kfd->doorbell_mutex);
 394         memset(&kfd->doorbell_available_index, 0,
 395                 sizeof(kfd->doorbell_available_index));
 396
 397         return kfd;
 398 }
 399
 400 static void kfd_cwsr_init(struct kfd_dev *kfd)
 401 {
 402         if (cwsr_enable && kfd->device_info->supports_cwsr) {
 403                 if (kfd->device_info->asic_family < CHIP_VEGA10) {
 404                         BUILD_BUG_ON(sizeof(cwsr_trap_gfx8_hex) > PAGE_SIZE);
 405                         kfd->cwsr_isa = cwsr_trap_gfx8_hex;
 406                         kfd->cwsr_isa_size = sizeof(cwsr_trap_gfx8_hex);
 407                 } else {
 408                         BUILD_BUG_ON(sizeof(cwsr_trap_gfx9_hex) > PAGE_SIZE);
 409                         kfd->cwsr_isa = cwsr_trap_gfx9_hex;
 410                         kfd->cwsr_isa_size = sizeof(cwsr_trap_gfx9_hex);
 411                 }
 412
 413                 kfd->cwsr_enabled = true;
 414         }
 415 }
 416
 417 bool kgd2kfd_device_init(struct kfd_dev *kfd,
 418                          const struct kgd2kfd_shared_resources *gpu_resources)
 419 {
 420         unsigned int size;
 421
 422         kfd->shared_resources = *gpu_resources;
 423
 424         kfd->vm_info.first_vmid_kfd = ffs(gpu_resources->compute_vmid_bitmap)-1;
 425         kfd->vm_info.last_vmid_kfd = fls(gpu_resources->compute_vmid_bitmap)-1;
 426         kfd->vm_info.vmid_num_kfd = kfd->vm_info.last_vmid_kfd
 427                         - kfd->vm_info.first_vmid_kfd + 1;
 428
 429         /* Verify module parameters regarding mapped process number*/
 430         if ((hws_max_conc_proc < 0)
 431                         || (hws_max_conc_proc > kfd->vm_info.vmid_num_kfd)) {
 432                 dev_err(kfd_device,
 433                         "hws_max_conc_proc %d must be between 0 and %d, use %d instead\n",
 434                         hws_max_conc_proc, kfd->vm_info.vmid_num_kfd,
 435                         kfd->vm_info.vmid_num_kfd);
 436                 kfd->max_proc_per_quantum = kfd->vm_info.vmid_num_kfd;
 437         } else
 438                 kfd->max_proc_per_quantum = hws_max_conc_proc;
 439
 440         /* calculate max size of mqds needed for queues */
 441         size = max_num_of_queues_per_device *
 442                         kfd->device_info->mqd_size_aligned;
 443
 444         /*
 445          * calculate max size of runlist packet.
 446          * There can be only 2 packets at once
 447          */
 448         size += (KFD_MAX_NUM_OF_PROCESSES * sizeof(struct pm4_mes_map_process) +
 449                 max_num_of_queues_per_device * sizeof(struct pm4_mes_map_queues)
 450                 + sizeof(struct pm4_mes_runlist)) * 2;
 451
 452         /* Add size of HIQ & DIQ */
 453         size += KFD_KERNEL_QUEUE_SIZE * 2;
 454
 455         /* add another 512KB for all other allocations on gart (HPD, fences) */
 456         size += 512 * 1024;
 457
 458         if (kfd->kfd2kgd->init_gtt_mem_allocation(
 459                         kfd->kgd, size, &kfd->gtt_mem,
 460                         &kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr,
 461                         false)) {
 462                 dev_err(kfd_device, "Could not allocate %d bytes\n", size);
 463                 goto out;
 464         }
 465
 466         dev_info(kfd_device, "Allocated %d bytes on gart\n", size);
 467
 468         /* Initialize GTT sa with 512 byte chunk size */
 469         if (kfd_gtt_sa_init(kfd, size, 512) != 0) {
 470                 dev_err(kfd_device, "Error initializing gtt sub-allocator\n");
 471                 goto kfd_gtt_sa_init_error;
 472         }
 473
 474         if (kfd_doorbell_init(kfd)) {
 475                 dev_err(kfd_device,
 476                         "Error initializing doorbell aperture\n");
 477                 goto kfd_doorbell_error;
 478         }
 479
 480         if (kfd->kfd2kgd->get_hive_id)
 481                 kfd->hive_id = kfd->kfd2kgd->get_hive_id(kfd->kgd);
 482
 483         if (kfd_topology_add_device(kfd)) {
 484                 dev_err(kfd_device, "Error adding device to topology\n");
 485                 goto kfd_topology_add_device_error;
 486         }
 487
 488         if (kfd_interrupt_init(kfd)) {
 489                 dev_err(kfd_device, "Error initializing interrupts\n");
 490                 goto kfd_interrupt_error;
 491         }
 492
 493         kfd->dqm = device_queue_manager_init(kfd);
 494         if (!kfd->dqm) {
 495                 dev_err(kfd_device, "Error initializing queue manager\n");
 496                 goto device_queue_manager_error;
 497         }
 498
 499         if (kfd_iommu_device_init(kfd)) {
 500                 dev_err(kfd_device, "Error initializing iommuv2\n");
 501                 goto device_iommu_error;
 502         }
 503
 504         kfd_cwsr_init(kfd);
 505
 506         if (kfd_resume(kfd))
 507                 goto kfd_resume_error;
 508
 509         kfd->dbgmgr = NULL;
 510
 511         kfd->init_complete = true;
 512         dev_info(kfd_device, "added device %x:%x\n", kfd->pdev->vendor,
 513                  kfd->pdev->device);
 514
 515         pr_debug("Starting kfd with the following scheduling policy %d\n",
 516                 kfd->dqm->sched_policy);
 517
 518         goto out;
 519
 520 kfd_resume_error:
 521 device_iommu_error:
 522         device_queue_manager_uninit(kfd->dqm);
 523 device_queue_manager_error:
 524         kfd_interrupt_exit(kfd);
 525 kfd_interrupt_error:
 526         kfd_topology_remove_device(kfd);
 527 kfd_topology_add_device_error:
 528         kfd_doorbell_fini(kfd);
 529 kfd_doorbell_error:
 530         kfd_gtt_sa_fini(kfd);
 531 kfd_gtt_sa_init_error:
 532         kfd->kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
 533         dev_err(kfd_device,
 534                 "device %x:%x NOT added due to errors\n",
 535                 kfd->pdev->vendor, kfd->pdev->device);
 536 out:
 537         return kfd->init_complete;
 538 }
 539
 540 void kgd2kfd_device_exit(struct kfd_dev *kfd)
 541 {
 542         if (kfd->init_complete) {
 543                 kgd2kfd_suspend(kfd);
 544                 device_queue_manager_uninit(kfd->dqm);
 545                 kfd_interrupt_exit(kfd);
 546                 kfd_topology_remove_device(kfd);
 547                 kfd_doorbell_fini(kfd);
 548                 kfd_gtt_sa_fini(kfd);
 549                 kfd->kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
 550         }
 551
 552         kfree(kfd);
 553 }
 554
 555 int kgd2kfd_pre_reset(struct kfd_dev *kfd)
 556 {
 557         if (!kfd->init_complete)
 558                 return 0;
 559         kgd2kfd_suspend(kfd);
 560
 561         /* hold dqm->lock to prevent further execution*/
 562         dqm_lock(kfd->dqm);
 563
 564         kfd_signal_reset_event(kfd);
 565         return 0;
 566 }
 567
 568 /*
 569  * Fix me. KFD won't be able to resume existing process for now.
 570  * We will keep all existing process in a evicted state and
 571  * wait the process to be terminated.
 572  */
 573
 574 int kgd2kfd_post_reset(struct kfd_dev *kfd)
 575 {
 576         int ret, count;
 577
 578         if (!kfd->init_complete)
 579                 return 0;
 580
 581         dqm_unlock(kfd->dqm);
 582
 583         ret = kfd_resume(kfd);
 584         if (ret)
 585                 return ret;
 586         count = atomic_dec_return(&kfd_locked);
 587         WARN_ONCE(count != 0, "KFD reset ref. error");
 588         return 0;
 589 }
 590
 591 bool kfd_is_locked(void)
 592 {
 593         return  (atomic_read(&kfd_locked) > 0);
 594 }
 595
 596 void kgd2kfd_suspend(struct kfd_dev *kfd)
 597 {
 598         if (!kfd->init_complete)
 599                 return;
 600
 601         /* For first KFD device suspend all the KFD processes */
 602         if (atomic_inc_return(&kfd_locked) == 1)
 603                 kfd_suspend_all_processes();
 604
 605         kfd->dqm->ops.stop(kfd->dqm);
 606
 607         kfd_iommu_suspend(kfd);
 608 }
 609
 610 int kgd2kfd_resume(struct kfd_dev *kfd)
 611 {
 612         int ret, count;
 613
 614         if (!kfd->init_complete)
 615                 return 0;
 616
 617         ret = kfd_resume(kfd);
 618         if (ret)
 619                 return ret;
 620
 621         count = atomic_dec_return(&kfd_locked);
 622         WARN_ONCE(count < 0, "KFD suspend / resume ref. error");
 623         if (count == 0)
 624                 ret = kfd_resume_all_processes();
 625
 626         return ret;
 627 }
 628
 629 static int kfd_resume(struct kfd_dev *kfd)
 630 {
 631         int err = 0;
 632
 633         err = kfd_iommu_resume(kfd);
 634         if (err) {
 635                 dev_err(kfd_device,
 636                         "Failed to resume IOMMU for device %x:%x\n",
 637                         kfd->pdev->vendor, kfd->pdev->device);
 638                 return err;
 639         }
 640
 641         err = kfd->dqm->ops.start(kfd->dqm);
 642         if (err) {
 643                 dev_err(kfd_device,
 644                         "Error starting queue manager for device %x:%x\n",
 645                         kfd->pdev->vendor, kfd->pdev->device);
 646                 goto dqm_start_error;
 647         }
 648
 649         return err;
 650
 651 dqm_start_error:
 652         kfd_iommu_suspend(kfd);
 653         return err;
 654 }
 655
 656 /* This is called directly from KGD at ISR. */
 657 void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
 658 {
 659         uint32_t patched_ihre[KFD_MAX_RING_ENTRY_SIZE];
 660         bool is_patched = false;
 661
 662         if (!kfd->init_complete)
 663                 return;
 664
 665         if (kfd->device_info->ih_ring_entry_size > sizeof(patched_ihre)) {
 666                 dev_err_once(kfd_device, "Ring entry too small\n");
 667                 return;
 668         }
 669
 670         spin_lock(&kfd->interrupt_lock);
 671
 672         if (kfd->interrupts_active
 673             && interrupt_is_wanted(kfd, ih_ring_entry,
 674                                    patched_ihre, &is_patched)
 675             && enqueue_ih_ring_entry(kfd,
 676                                      is_patched ? patched_ihre : ih_ring_entry))
 677                 queue_work(kfd->ih_wq, &kfd->interrupt_work);
 678
 679         spin_unlock(&kfd->interrupt_lock);
 680 }
 681
 682 int kgd2kfd_quiesce_mm(struct mm_struct *mm)
 683 {
 684         struct kfd_process *p;
 685         int r;
 686
 687         /* Because we are called from arbitrary context (workqueue) as opposed
 688          * to process context, kfd_process could attempt to exit while we are
 689          * running so the lookup function increments the process ref count.
 690          */
 691         p = kfd_lookup_process_by_mm(mm);
 692         if (!p)
 693                 return -ESRCH;
 694
 695         r = kfd_process_evict_queues(p);
 696
 697         kfd_unref_process(p);
 698         return r;
 699 }
 700
 701 int kgd2kfd_resume_mm(struct mm_struct *mm)
 702 {
 703         struct kfd_process *p;
 704         int r;
 705
 706         /* Because we are called from arbitrary context (workqueue) as opposed
 707          * to process context, kfd_process could attempt to exit while we are
 708          * running so the lookup function increments the process ref count.
 709          */
 710         p = kfd_lookup_process_by_mm(mm);
 711         if (!p)
 712                 return -ESRCH;
 713
 714         r = kfd_process_restore_queues(p);
 715
 716         kfd_unref_process(p);
 717         return r;
 718 }
 719
 720 /** kgd2kfd_schedule_evict_and_restore_process - Schedules work queue that will
 721  *   prepare for safe eviction of KFD BOs that belong to the specified
 722  *   process.
 723  *
 724  * @mm: mm_struct that identifies the specified KFD process
 725  * @fence: eviction fence attached to KFD process BOs
 726  *
 727  */
 728 int kgd2kfd_schedule_evict_and_restore_process(struct mm_struct *mm,
 729                                                struct dma_fence *fence)
 730 {
 731         struct kfd_process *p;
 732         unsigned long active_time;
 733         unsigned long delay_jiffies = msecs_to_jiffies(PROCESS_ACTIVE_TIME_MS);
 734
 735         if (!fence)
 736                 return -EINVAL;
 737
 738         if (dma_fence_is_signaled(fence))
 739                 return 0;
 740
 741         p = kfd_lookup_process_by_mm(mm);
 742         if (!p)
 743                 return -ENODEV;
 744
 745         if (fence->seqno == p->last_eviction_seqno)
 746                 goto out;
 747
 748         p->last_eviction_seqno = fence->seqno;
 749
 750         /* Avoid KFD process starvation. Wait for at least
 751          * PROCESS_ACTIVE_TIME_MS before evicting the process again
 752          */
 753         active_time = get_jiffies_64() - p->last_restore_timestamp;
 754         if (delay_jiffies > active_time)
 755                 delay_jiffies -= active_time;
 756         else
 757                 delay_jiffies = 0;
 758
 759         /* During process initialization eviction_work.dwork is initialized
 760          * to kfd_evict_bo_worker
 761          */
 762         schedule_delayed_work(&p->eviction_work, delay_jiffies);
 763 out:
 764         kfd_unref_process(p);
 765         return 0;
 766 }
 767
 768 static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
 769                                 unsigned int chunk_size)
 770 {
 771         unsigned int num_of_longs;
 772
 773         if (WARN_ON(buf_size < chunk_size))
 774                 return -EINVAL;
 775         if (WARN_ON(buf_size == 0))
 776                 return -EINVAL;
 777         if (WARN_ON(chunk_size == 0))
 778                 return -EINVAL;
 779
 780         kfd->gtt_sa_chunk_size = chunk_size;
 781         kfd->gtt_sa_num_of_chunks = buf_size / chunk_size;
 782
 783         num_of_longs = (kfd->gtt_sa_num_of_chunks + BITS_PER_LONG - 1) /
 784                 BITS_PER_LONG;
 785
 786         kfd->gtt_sa_bitmap = kcalloc(num_of_longs, sizeof(long), GFP_KERNEL);
 787
 788         if (!kfd->gtt_sa_bitmap)
 789                 return -ENOMEM;
 790
 791         pr_debug("gtt_sa_num_of_chunks = %d, gtt_sa_bitmap = %p\n",
 792                         kfd->gtt_sa_num_of_chunks, kfd->gtt_sa_bitmap);
 793
 794         mutex_init(&kfd->gtt_sa_lock);
 795
 796         return 0;
 797
 798 }
 799
 800 static void kfd_gtt_sa_fini(struct kfd_dev *kfd)
 801 {
 802         mutex_destroy(&kfd->gtt_sa_lock);
 803         kfree(kfd->gtt_sa_bitmap);
 804 }
 805
 806 static inline uint64_t kfd_gtt_sa_calc_gpu_addr(uint64_t start_addr,
 807                                                 unsigned int bit_num,
 808                                                 unsigned int chunk_size)
 809 {
 810         return start_addr + bit_num * chunk_size;
 811 }
 812
 813 static inline uint32_t *kfd_gtt_sa_calc_cpu_addr(void *start_addr,
 814                                                 unsigned int bit_num,
 815                                                 unsigned int chunk_size)
 816 {
 817         return (uint32_t *) ((uint64_t) start_addr + bit_num * chunk_size);
 818 }
 819
 820 int kfd_gtt_sa_allocate(struct kfd_dev *kfd, unsigned int size,
 821                         struct kfd_mem_obj **mem_obj)
 822 {
 823         unsigned int found, start_search, cur_size;
 824
 825         if (size == 0)
 826                 return -EINVAL;
 827
 828         if (size > kfd->gtt_sa_num_of_chunks * kfd->gtt_sa_chunk_size)
 829                 return -ENOMEM;
 830
 831         *mem_obj = kzalloc(sizeof(struct kfd_mem_obj), GFP_KERNEL);
 832         if (!(*mem_obj))
 833                 return -ENOMEM;
 834
 835         pr_debug("Allocated mem_obj = %p for size = %d\n", *mem_obj, size);
 836
 837         start_search = 0;
 838
 839         mutex_lock(&kfd->gtt_sa_lock);
 840
 841 kfd_gtt_restart_search:
 842         /* Find the first chunk that is free */
 843         found = find_next_zero_bit(kfd->gtt_sa_bitmap,
 844                                         kfd->gtt_sa_num_of_chunks,
 845                                         start_search);
 846
 847         pr_debug("Found = %d\n", found);
 848
 849         /* If there wasn't any free chunk, bail out */
 850         if (found == kfd->gtt_sa_num_of_chunks)
 851                 goto kfd_gtt_no_free_chunk;
 852
 853         /* Update fields of mem_obj */
 854         (*mem_obj)->range_start = found;
 855         (*mem_obj)->range_end = found;
 856         (*mem_obj)->gpu_addr = kfd_gtt_sa_calc_gpu_addr(
 857                                         kfd->gtt_start_gpu_addr,
 858                                         found,
 859                                         kfd->gtt_sa_chunk_size);
 860         (*mem_obj)->cpu_ptr = kfd_gtt_sa_calc_cpu_addr(
 861                                         kfd->gtt_start_cpu_ptr,
 862                                         found,
 863                                         kfd->gtt_sa_chunk_size);
 864
 865         pr_debug("gpu_addr = %p, cpu_addr = %p\n",
 866                         (uint64_t *) (*mem_obj)->gpu_addr, (*mem_obj)->cpu_ptr);
 867
 868         /* If we need only one chunk, mark it as allocated and get out */
 869         if (size <= kfd->gtt_sa_chunk_size) {
 870                 pr_debug("Single bit\n");
 871                 set_bit(found, kfd->gtt_sa_bitmap);
 872                 goto kfd_gtt_out;
 873         }
 874
 875         /* Otherwise, try to see if we have enough contiguous chunks */
 876         cur_size = size - kfd->gtt_sa_chunk_size;
 877         do {
 878                 (*mem_obj)->range_end =
 879                         find_next_zero_bit(kfd->gtt_sa_bitmap,
 880                                         kfd->gtt_sa_num_of_chunks, ++found);
 881                 /*
 882                  * If next free chunk is not contiguous than we need to
 883                  * restart our search from the last free chunk we found (which
 884                  * wasn't contiguous to the previous ones
 885                  */
 886                 if ((*mem_obj)->range_end != found) {
 887                         start_search = found;
 888                         goto kfd_gtt_restart_search;
 889                 }
 890
 891                 /*
 892                  * If we reached end of buffer, bail out with error
 893                  */
 894                 if (found == kfd->gtt_sa_num_of_chunks)
 895                         goto kfd_gtt_no_free_chunk;
 896
 897                 /* Check if we don't need another chunk */
 898                 if (cur_size <= kfd->gtt_sa_chunk_size)
 899                         cur_size = 0;
 900                 else
 901                         cur_size -= kfd->gtt_sa_chunk_size;
 902
 903         } while (cur_size > 0);
 904
 905         pr_debug("range_start = %d, range_end = %d\n",
 906                 (*mem_obj)->range_start, (*mem_obj)->range_end);
 907
 908         /* Mark the chunks as allocated */
 909         for (found = (*mem_obj)->range_start;
 910                 found <= (*mem_obj)->range_end;
 911                 found++)
 912                 set_bit(found, kfd->gtt_sa_bitmap);
 913
 914 kfd_gtt_out:
 915         mutex_unlock(&kfd->gtt_sa_lock);
 916         return 0;
 917
 918 kfd_gtt_no_free_chunk:
 919         pr_debug("Allocation failed with mem_obj = %p\n", mem_obj);
 920         mutex_unlock(&kfd->gtt_sa_lock);
 921         kfree(mem_obj);
 922         return -ENOMEM;
 923 }
 924
 925 int kfd_gtt_sa_free(struct kfd_dev *kfd, struct kfd_mem_obj *mem_obj)
 926 {
 927         unsigned int bit;
 928
 929         /* Act like kfree when trying to free a NULL object */
 930         if (!mem_obj)
 931                 return 0;
 932
 933         pr_debug("Free mem_obj = %p, range_start = %d, range_end = %d\n",
 934                         mem_obj, mem_obj->range_start, mem_obj->range_end);
 935
 936         mutex_lock(&kfd->gtt_sa_lock);
 937
 938         /* Mark the chunks as free */
 939         for (bit = mem_obj->range_start;
 940                 bit <= mem_obj->range_end;
 941                 bit++)
 942                 clear_bit(bit, kfd->gtt_sa_bitmap);
 943
 944         mutex_unlock(&kfd->gtt_sa_lock);
 945
 946         kfree(mem_obj);
 947         return 0;
 948 }
 949
 950 #if defined(CONFIG_DEBUG_FS)
 951
 952 /* This function will send a package to HIQ to hang the HWS
 953  * which will trigger a GPU reset and bring the HWS back to normal state
 954  */
 955 int kfd_debugfs_hang_hws(struct kfd_dev *dev)
 956 {
 957         int r = 0;
 958
 959         if (dev->dqm->sched_policy != KFD_SCHED_POLICY_HWS) {
 960                 pr_err("HWS is not enabled");
 961                 return -EINVAL;
 962         }
 963
 964         r = pm_debugfs_hang_hws(&dev->dqm->packets);
 965         if (!r)
 966                 r = dqm_debugfs_execute_queues(dev->dqm);
 967
 968         return r;
 969 }
 970
 971 #endif