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