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

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /*
   3  * Copyright 2014-2022 Advanced Micro Devices, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21  * OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include <linux/slab.h>
  26 #include <linux/mutex.h>
  27 #include "kfd_device_queue_manager.h"
  28 #include "kfd_kernel_queue.h"
  29 #include "kfd_priv.h"
  30
  31 static inline void inc_wptr(unsigned int *wptr, unsigned int increment_bytes,
  32                                 unsigned int buffer_size_bytes)
  33 {
  34         unsigned int temp = *wptr + increment_bytes / sizeof(uint32_t);
  35
  36         WARN((temp * sizeof(uint32_t)) > buffer_size_bytes,
  37              "Runlist IB overflow");
  38         *wptr = temp;
  39 }
  40
  41 static void pm_calc_rlib_size(struct packet_manager *pm,
  42                                 unsigned int *rlib_size,
  43                                 bool *over_subscription)
  44 {
  45         unsigned int process_count, queue_count, compute_queue_count, gws_queue_count;
  46         unsigned int map_queue_size;
  47         unsigned int max_proc_per_quantum = 1;
  48         struct kfd_node *dev = pm->dqm->dev;
  49
  50         process_count = pm->dqm->processes_count;
  51         queue_count = pm->dqm->active_queue_count;
  52         compute_queue_count = pm->dqm->active_cp_queue_count;
  53         gws_queue_count = pm->dqm->gws_queue_count;
  54
  55         /* check if there is over subscription
  56          * Note: the arbitration between the number of VMIDs and
  57          * hws_max_conc_proc has been done in
  58          * kgd2kfd_device_init().
  59          */
  60         *over_subscription = false;
  61
  62         if (dev->max_proc_per_quantum > 1)
  63                 max_proc_per_quantum = dev->max_proc_per_quantum;
  64
  65         if ((process_count > max_proc_per_quantum) ||
  66             compute_queue_count > get_cp_queues_num(pm->dqm) ||
  67             gws_queue_count > 1) {
  68                 *over_subscription = true;
  69                 pr_debug("Over subscribed runlist\n");
  70         }
  71
  72         map_queue_size = pm->pmf->map_queues_size;
  73         /* calculate run list ib allocation size */
  74         *rlib_size = process_count * pm->pmf->map_process_size +
  75                      queue_count * map_queue_size;
  76
  77         /*
  78          * Increase the allocation size in case we need a chained run list
  79          * when over subscription
  80          */
  81         if (*over_subscription)
  82                 *rlib_size += pm->pmf->runlist_size;
  83
  84         pr_debug("runlist ib size %d\n", *rlib_size);
  85 }
  86
  87 static int pm_allocate_runlist_ib(struct packet_manager *pm,
  88                                 unsigned int **rl_buffer,
  89                                 uint64_t *rl_gpu_buffer,
  90                                 unsigned int *rl_buffer_size,
  91                                 bool *is_over_subscription)
  92 {
  93         int retval;
  94
  95         if (WARN_ON(pm->allocated))
  96                 return -EINVAL;
  97
  98         pm_calc_rlib_size(pm, rl_buffer_size, is_over_subscription);
  99
 100         mutex_lock(&pm->lock);
 101
 102         retval = kfd_gtt_sa_allocate(pm->dqm->dev, *rl_buffer_size,
 103                                         &pm->ib_buffer_obj);
 104
 105         if (retval) {
 106                 pr_err("Failed to allocate runlist IB\n");
 107                 goto out;
 108         }
 109
 110         *(void **)rl_buffer = pm->ib_buffer_obj->cpu_ptr;
 111         *rl_gpu_buffer = pm->ib_buffer_obj->gpu_addr;
 112
 113         memset(*rl_buffer, 0, *rl_buffer_size);
 114         pm->allocated = true;
 115
 116 out:
 117         mutex_unlock(&pm->lock);
 118         return retval;
 119 }
 120
 121 static int pm_create_runlist_ib(struct packet_manager *pm,
 122                                 struct list_head *queues,
 123                                 uint64_t *rl_gpu_addr,
 124                                 size_t *rl_size_bytes)
 125 {
 126         unsigned int alloc_size_bytes;
 127         unsigned int *rl_buffer, rl_wptr, i;
 128         int retval, processes_mapped;
 129         struct device_process_node *cur;
 130         struct qcm_process_device *qpd;
 131         struct queue *q;
 132         struct kernel_queue *kq;
 133         bool is_over_subscription;
 134
 135         rl_wptr = retval = processes_mapped = 0;
 136
 137         retval = pm_allocate_runlist_ib(pm, &rl_buffer, rl_gpu_addr,
 138                                 &alloc_size_bytes, &is_over_subscription);
 139         if (retval)
 140                 return retval;
 141
 142         *rl_size_bytes = alloc_size_bytes;
 143         pm->ib_size_bytes = alloc_size_bytes;
 144
 145         pr_debug("Building runlist ib process count: %d queues count %d\n",
 146                 pm->dqm->processes_count, pm->dqm->active_queue_count);
 147
 148         /* build the run list ib packet */
 149         list_for_each_entry(cur, queues, list) {
 150                 qpd = cur->qpd;
 151                 /* build map process packet */
 152                 if (processes_mapped >= pm->dqm->processes_count) {
 153                         pr_debug("Not enough space left in runlist IB\n");
 154                         pm_release_ib(pm);
 155                         return -ENOMEM;
 156                 }
 157
 158                 retval = pm->pmf->map_process(pm, &rl_buffer[rl_wptr], qpd);
 159                 if (retval)
 160                         return retval;
 161
 162                 processes_mapped++;
 163                 inc_wptr(&rl_wptr, pm->pmf->map_process_size,
 164                                 alloc_size_bytes);
 165
 166                 list_for_each_entry(kq, &qpd->priv_queue_list, list) {
 167                         if (!kq->queue->properties.is_active)
 168                                 continue;
 169
 170                         pr_debug("static_queue, mapping kernel q %d, is debug status %d\n",
 171                                 kq->queue->queue, qpd->is_debug);
 172
 173                         retval = pm->pmf->map_queues(pm,
 174                                                 &rl_buffer[rl_wptr],
 175                                                 kq->queue,
 176                                                 qpd->is_debug);
 177                         if (retval)
 178                                 return retval;
 179
 180                         inc_wptr(&rl_wptr,
 181                                 pm->pmf->map_queues_size,
 182                                 alloc_size_bytes);
 183                 }
 184
 185                 list_for_each_entry(q, &qpd->queues_list, list) {
 186                         if (!q->properties.is_active)
 187                                 continue;
 188
 189                         pr_debug("static_queue, mapping user queue %d, is debug status %d\n",
 190                                 q->queue, qpd->is_debug);
 191
 192                         retval = pm->pmf->map_queues(pm,
 193                                                 &rl_buffer[rl_wptr],
 194                                                 q,
 195                                                 qpd->is_debug);
 196
 197                         if (retval)
 198                                 return retval;
 199
 200                         inc_wptr(&rl_wptr,
 201                                 pm->pmf->map_queues_size,
 202                                 alloc_size_bytes);
 203                 }
 204         }
 205
 206         pr_debug("Finished map process and queues to runlist\n");
 207
 208         if (is_over_subscription) {
 209                 if (!pm->is_over_subscription)
 210                         pr_warn("Runlist is getting oversubscribed. Expect reduced ROCm performance.\n");
 211                 retval = pm->pmf->runlist(pm, &rl_buffer[rl_wptr],
 212                                         *rl_gpu_addr,
 213                                         alloc_size_bytes / sizeof(uint32_t),
 214                                         true);
 215         }
 216         pm->is_over_subscription = is_over_subscription;
 217
 218         for (i = 0; i < alloc_size_bytes / sizeof(uint32_t); i++)
 219                 pr_debug("0x%2X ", rl_buffer[i]);
 220         pr_debug("\n");
 221
 222         return retval;
 223 }
 224
 225 int pm_init(struct packet_manager *pm, struct device_queue_manager *dqm)
 226 {
 227         switch (dqm->dev->adev->asic_type) {
 228         case CHIP_KAVERI:
 229         case CHIP_HAWAII:
 230                 /* PM4 packet structures on CIK are the same as on VI */
 231         case CHIP_CARRIZO:
 232         case CHIP_TONGA:
 233         case CHIP_FIJI:
 234         case CHIP_POLARIS10:
 235         case CHIP_POLARIS11:
 236         case CHIP_POLARIS12:
 237         case CHIP_VEGAM:
 238                 pm->pmf = &kfd_vi_pm_funcs;
 239                 break;
 240         default:
 241                 if (KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 4, 2) ||
 242                     KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 4, 3))
 243                         pm->pmf = &kfd_aldebaran_pm_funcs;
 244                 else if (KFD_GC_VERSION(dqm->dev) >= IP_VERSION(9, 0, 1))
 245                         pm->pmf = &kfd_v9_pm_funcs;
 246                 else {
 247                         WARN(1, "Unexpected ASIC family %u",
 248                              dqm->dev->adev->asic_type);
 249                         return -EINVAL;
 250                 }
 251         }
 252
 253         pm->dqm = dqm;
 254         mutex_init(&pm->lock);
 255         pm->priv_queue = kernel_queue_init(dqm->dev, KFD_QUEUE_TYPE_HIQ);
 256         if (!pm->priv_queue) {
 257                 mutex_destroy(&pm->lock);
 258                 return -ENOMEM;
 259         }
 260         pm->allocated = false;
 261
 262         return 0;
 263 }
 264
 265 void pm_uninit(struct packet_manager *pm, bool hanging)
 266 {
 267         mutex_destroy(&pm->lock);
 268         kernel_queue_uninit(pm->priv_queue, hanging);
 269         pm->priv_queue = NULL;
 270 }
 271
 272 int pm_send_set_resources(struct packet_manager *pm,
 273                                 struct scheduling_resources *res)
 274 {
 275         uint32_t *buffer, size;
 276         int retval = 0;
 277
 278         size = pm->pmf->set_resources_size;
 279         mutex_lock(&pm->lock);
 280         kq_acquire_packet_buffer(pm->priv_queue,
 281                                         size / sizeof(uint32_t),
 282                                         (unsigned int **)&buffer);
 283         if (!buffer) {
 284                 pr_err("Failed to allocate buffer on kernel queue\n");
 285                 retval = -ENOMEM;
 286                 goto out;
 287         }
 288
 289         retval = pm->pmf->set_resources(pm, buffer, res);
 290         if (!retval)
 291                 kq_submit_packet(pm->priv_queue);
 292         else
 293                 kq_rollback_packet(pm->priv_queue);
 294
 295 out:
 296         mutex_unlock(&pm->lock);
 297
 298         return retval;
 299 }
 300
 301 int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues)
 302 {
 303         uint64_t rl_gpu_ib_addr;
 304         uint32_t *rl_buffer;
 305         size_t rl_ib_size, packet_size_dwords;
 306         int retval;
 307
 308         retval = pm_create_runlist_ib(pm, dqm_queues, &rl_gpu_ib_addr,
 309                                         &rl_ib_size);
 310         if (retval)
 311                 goto fail_create_runlist_ib;
 312
 313         pr_debug("runlist IB address: 0x%llX\n", rl_gpu_ib_addr);
 314
 315         packet_size_dwords = pm->pmf->runlist_size / sizeof(uint32_t);
 316         mutex_lock(&pm->lock);
 317
 318         retval = kq_acquire_packet_buffer(pm->priv_queue,
 319                                         packet_size_dwords, &rl_buffer);
 320         if (retval)
 321                 goto fail_acquire_packet_buffer;
 322
 323         retval = pm->pmf->runlist(pm, rl_buffer, rl_gpu_ib_addr,
 324                                         rl_ib_size / sizeof(uint32_t), false);
 325         if (retval)
 326                 goto fail_create_runlist;
 327
 328         kq_submit_packet(pm->priv_queue);
 329
 330         mutex_unlock(&pm->lock);
 331
 332         return retval;
 333
 334 fail_create_runlist:
 335         kq_rollback_packet(pm->priv_queue);
 336 fail_acquire_packet_buffer:
 337         mutex_unlock(&pm->lock);
 338 fail_create_runlist_ib:
 339         pm_release_ib(pm);
 340         return retval;
 341 }
 342
 343 int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address,
 344                         uint64_t fence_value)
 345 {
 346         uint32_t *buffer, size;
 347         int retval = 0;
 348
 349         if (WARN_ON(!fence_address))
 350                 return -EFAULT;
 351
 352         size = pm->pmf->query_status_size;
 353         mutex_lock(&pm->lock);
 354         kq_acquire_packet_buffer(pm->priv_queue,
 355                         size / sizeof(uint32_t), (unsigned int **)&buffer);
 356         if (!buffer) {
 357                 pr_err("Failed to allocate buffer on kernel queue\n");
 358                 retval = -ENOMEM;
 359                 goto out;
 360         }
 361
 362         retval = pm->pmf->query_status(pm, buffer, fence_address, fence_value);
 363         if (!retval)
 364                 kq_submit_packet(pm->priv_queue);
 365         else
 366                 kq_rollback_packet(pm->priv_queue);
 367
 368 out:
 369         mutex_unlock(&pm->lock);
 370         return retval;
 371 }
 372
 373 int pm_update_grace_period(struct packet_manager *pm, uint32_t grace_period)
 374 {
 375         int retval = 0;
 376         uint32_t *buffer, size;
 377
 378         size = pm->pmf->set_grace_period_size;
 379
 380         mutex_lock(&pm->lock);
 381
 382         if (size) {
 383                 kq_acquire_packet_buffer(pm->priv_queue,
 384                         size / sizeof(uint32_t),
 385                         (unsigned int **)&buffer);
 386
 387                 if (!buffer) {
 388                         pr_err("Failed to allocate buffer on kernel queue\n");
 389                         retval = -ENOMEM;
 390                         goto out;
 391                 }
 392
 393                 retval = pm->pmf->set_grace_period(pm, buffer, grace_period);
 394                 if (!retval)
 395                         kq_submit_packet(pm->priv_queue);
 396                 else
 397                         kq_rollback_packet(pm->priv_queue);
 398         }
 399
 400 out:
 401         mutex_unlock(&pm->lock);
 402         return retval;
 403 }
 404
 405 int pm_send_unmap_queue(struct packet_manager *pm,
 406                         enum kfd_unmap_queues_filter filter,
 407                         uint32_t filter_param, bool reset)
 408 {
 409         uint32_t *buffer, size;
 410         int retval = 0;
 411
 412         size = pm->pmf->unmap_queues_size;
 413         mutex_lock(&pm->lock);
 414         kq_acquire_packet_buffer(pm->priv_queue,
 415                         size / sizeof(uint32_t), (unsigned int **)&buffer);
 416         if (!buffer) {
 417                 pr_err("Failed to allocate buffer on kernel queue\n");
 418                 retval = -ENOMEM;
 419                 goto out;
 420         }
 421
 422         retval = pm->pmf->unmap_queues(pm, buffer, filter, filter_param, reset);
 423         if (!retval)
 424                 kq_submit_packet(pm->priv_queue);
 425         else
 426                 kq_rollback_packet(pm->priv_queue);
 427
 428 out:
 429         mutex_unlock(&pm->lock);
 430         return retval;
 431 }
 432
 433 void pm_release_ib(struct packet_manager *pm)
 434 {
 435         mutex_lock(&pm->lock);
 436         if (pm->allocated) {
 437                 kfd_gtt_sa_free(pm->dqm->dev, pm->ib_buffer_obj);
 438                 pm->allocated = false;
 439         }
 440         mutex_unlock(&pm->lock);
 441 }
 442
 443 #if defined(CONFIG_DEBUG_FS)
 444
 445 int pm_debugfs_runlist(struct seq_file *m, void *data)
 446 {
 447         struct packet_manager *pm = data;
 448
 449         mutex_lock(&pm->lock);
 450
 451         if (!pm->allocated) {
 452                 seq_puts(m, "  No active runlist\n");
 453                 goto out;
 454         }
 455
 456         seq_hex_dump(m, "  ", DUMP_PREFIX_OFFSET, 32, 4,
 457                      pm->ib_buffer_obj->cpu_ptr, pm->ib_size_bytes, false);
 458
 459 out:
 460         mutex_unlock(&pm->lock);
 461         return 0;
 462 }
 463
 464 int pm_debugfs_hang_hws(struct packet_manager *pm)
 465 {
 466         uint32_t *buffer, size;
 467         int r = 0;
 468
 469         if (!pm->priv_queue)
 470                 return -EAGAIN;
 471
 472         size = pm->pmf->query_status_size;
 473         mutex_lock(&pm->lock);
 474         kq_acquire_packet_buffer(pm->priv_queue,
 475                         size / sizeof(uint32_t), (unsigned int **)&buffer);
 476         if (!buffer) {
 477                 pr_err("Failed to allocate buffer on kernel queue\n");
 478                 r = -ENOMEM;
 479                 goto out;
 480         }
 481         memset(buffer, 0x55, size);
 482         kq_submit_packet(pm->priv_queue);
 483
 484         pr_info("Submitting %x %x %x %x %x %x %x to HIQ to hang the HWS.",
 485                 buffer[0], buffer[1], buffer[2], buffer[3],
 486                 buffer[4], buffer[5], buffer[6]);
 487 out:
 488         mutex_unlock(&pm->lock);
 489         return r;
 490 }
 491
 492
 493 #endif