drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.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
  24 #include <linux/slab.h>
  25 #include <linux/mutex.h>
  26 #include "kfd_device_queue_manager.h"
  27 #include "kfd_kernel_queue.h"
  28 #include "kfd_priv.h"
  29
  30 static inline void inc_wptr(unsigned int *wptr, unsigned int increment_bytes,
  31                                 unsigned int buffer_size_bytes)
  32 {
  33         unsigned int temp = *wptr + increment_bytes / sizeof(uint32_t);
  34
  35         WARN((temp * sizeof(uint32_t)) > buffer_size_bytes,
  36              "Runlist IB overflow");
  37         *wptr = temp;
  38 }
  39
  40 static void pm_calc_rlib_size(struct packet_manager *pm,
  41                                 unsigned int *rlib_size,
  42                                 bool *over_subscription)
  43 {
  44         unsigned int process_count, queue_count, compute_queue_count, gws_queue_count;
  45         unsigned int map_queue_size;
  46         unsigned int max_proc_per_quantum = 1;
  47         struct kfd_dev *dev = pm->dqm->dev;
  48
  49         process_count = pm->dqm->processes_count;
  50         queue_count = pm->dqm->active_queue_count;
  51         compute_queue_count = pm->dqm->active_cp_queue_count;
  52         gws_queue_count = pm->dqm->gws_queue_count;
  53
  54         /* check if there is over subscription
  55          * Note: the arbitration between the number of VMIDs and
  56          * hws_max_conc_proc has been done in
  57          * kgd2kfd_device_init().
  58          */
  59         *over_subscription = false;
  60
  61         if (dev->max_proc_per_quantum > 1)
  62                 max_proc_per_quantum = dev->max_proc_per_quantum;
  63
  64         if ((process_count > max_proc_per_quantum) ||
  65             compute_queue_count > get_cp_queues_num(pm->dqm) ||
  66             gws_queue_count > 1) {
  67                 *over_subscription = true;
  68                 pr_debug("Over subscribed runlist\n");
  69         }
  70
  71         map_queue_size = pm->pmf->map_queues_size;
  72         /* calculate run list ib allocation size */
  73         *rlib_size = process_count * pm->pmf->map_process_size +
  74                      queue_count * map_queue_size;
  75
  76         /*
  77          * Increase the allocation size in case we need a chained run list
  78          * when over subscription
  79          */
  80         if (*over_subscription)
  81                 *rlib_size += pm->pmf->runlist_size;
  82
  83         pr_debug("runlist ib size %d\n", *rlib_size);
  84 }
  85
  86 static int pm_allocate_runlist_ib(struct packet_manager *pm,
  87                                 unsigned int **rl_buffer,
  88                                 uint64_t *rl_gpu_buffer,
  89                                 unsigned int *rl_buffer_size,
  90                                 bool *is_over_subscription)
  91 {
  92         int retval;
  93
  94         if (WARN_ON(pm->allocated))
  95                 return -EINVAL;
  96
  97         pm_calc_rlib_size(pm, rl_buffer_size, is_over_subscription);
  98
  99         mutex_lock(&pm->lock);
 100
 101         retval = kfd_gtt_sa_allocate(pm->dqm->dev, *rl_buffer_size,
 102                                         &pm->ib_buffer_obj);
 103
 104         if (retval) {
 105                 pr_err("Failed to allocate runlist IB\n");
 106                 goto out;
 107         }
 108
 109         *(void **)rl_buffer = pm->ib_buffer_obj->cpu_ptr;
 110         *rl_gpu_buffer = pm->ib_buffer_obj->gpu_addr;
 111
 112         memset(*rl_buffer, 0, *rl_buffer_size);
 113         pm->allocated = true;
 114
 115 out:
 116         mutex_unlock(&pm->lock);
 117         return retval;
 118 }
 119
 120 static int pm_create_runlist_ib(struct packet_manager *pm,
 121                                 struct list_head *queues,
 122                                 uint64_t *rl_gpu_addr,
 123                                 size_t *rl_size_bytes)
 124 {
 125         unsigned int alloc_size_bytes;
 126         unsigned int *rl_buffer, rl_wptr, i;
 127         int retval, processes_mapped;
 128         struct device_process_node *cur;
 129         struct qcm_process_device *qpd;
 130         struct queue *q;
 131         struct kernel_queue *kq;
 132         bool is_over_subscription;
 133
 134         rl_wptr = retval = processes_mapped = 0;
 135
 136         retval = pm_allocate_runlist_ib(pm, &rl_buffer, rl_gpu_addr,
 137                                 &alloc_size_bytes, &is_over_subscription);
 138         if (retval)
 139                 return retval;
 140
 141         *rl_size_bytes = alloc_size_bytes;
 142         pm->ib_size_bytes = alloc_size_bytes;
 143
 144         pr_debug("Building runlist ib process count: %d queues count %d\n",
 145                 pm->dqm->processes_count, pm->dqm->active_queue_count);
 146
 147         /* build the run list ib packet */
 148         list_for_each_entry(cur, queues, list) {
 149                 qpd = cur->qpd;
 150                 /* build map process packet */
 151                 if (processes_mapped >= pm->dqm->processes_count) {
 152                         pr_debug("Not enough space left in runlist IB\n");
 153                         pm_release_ib(pm);
 154                         return -ENOMEM;
 155                 }
 156
 157                 retval = pm->pmf->map_process(pm, &rl_buffer[rl_wptr], qpd);
 158                 if (retval)
 159                         return retval;
 160
 161                 processes_mapped++;
 162                 inc_wptr(&rl_wptr, pm->pmf->map_process_size,
 163                                 alloc_size_bytes);
 164
 165                 list_for_each_entry(kq, &qpd->priv_queue_list, list) {
 166                         if (!kq->queue->properties.is_active)
 167                                 continue;
 168
 169                         pr_debug("static_queue, mapping kernel q %d, is debug status %d\n",
 170                                 kq->queue->queue, qpd->is_debug);
 171
 172                         retval = pm->pmf->map_queues(pm,
 173                                                 &rl_buffer[rl_wptr],
 174                                                 kq->queue,
 175                                                 qpd->is_debug);
 176                         if (retval)
 177                                 return retval;
 178
 179                         inc_wptr(&rl_wptr,
 180                                 pm->pmf->map_queues_size,
 181                                 alloc_size_bytes);
 182                 }
 183
 184                 list_for_each_entry(q, &qpd->queues_list, list) {
 185                         if (!q->properties.is_active)
 186                                 continue;
 187
 188                         pr_debug("static_queue, mapping user queue %d, is debug status %d\n",
 189                                 q->queue, qpd->is_debug);
 190
 191                         retval = pm->pmf->map_queues(pm,
 192                                                 &rl_buffer[rl_wptr],
 193                                                 q,
 194                                                 qpd->is_debug);
 195
 196                         if (retval)
 197                                 return retval;
 198
 199                         inc_wptr(&rl_wptr,
 200                                 pm->pmf->map_queues_size,
 201                                 alloc_size_bytes);
 202                 }
 203         }
 204
 205         pr_debug("Finished map process and queues to runlist\n");
 206
 207         if (is_over_subscription) {
 208                 if (!pm->is_over_subscription)
 209                         pr_warn("Runlist is getting oversubscribed. Expect reduced ROCm performance.\n");
 210                 retval = pm->pmf->runlist(pm, &rl_buffer[rl_wptr],
 211                                         *rl_gpu_addr,
 212                                         alloc_size_bytes / sizeof(uint32_t),
 213                                         true);
 214         }
 215         pm->is_over_subscription = is_over_subscription;
 216
 217         for (i = 0; i < alloc_size_bytes / sizeof(uint32_t); i++)
 218                 pr_debug("0x%2X ", rl_buffer[i]);
 219         pr_debug("\n");
 220
 221         return retval;
 222 }
 223
 224 int pm_init(struct packet_manager *pm, struct device_queue_manager *dqm)
 225 {
 226         switch (dqm->dev->device_info->asic_family) {
 227         case CHIP_KAVERI:
 228         case CHIP_HAWAII:
 229                 /* PM4 packet structures on CIK are the same as on VI */
 230         case CHIP_CARRIZO:
 231         case CHIP_TONGA:
 232         case CHIP_FIJI:
 233         case CHIP_POLARIS10:
 234         case CHIP_POLARIS11:
 235         case CHIP_POLARIS12:
 236         case CHIP_VEGAM:
 237                 pm->pmf = &kfd_vi_pm_funcs;
 238                 break;
 239         case CHIP_VEGA10:
 240         case CHIP_VEGA12:
 241         case CHIP_VEGA20:
 242         case CHIP_RAVEN:
 243         case CHIP_RENOIR:
 244         case CHIP_ARCTURUS:
 245         case CHIP_NAVI10:
 246         case CHIP_NAVI12:
 247         case CHIP_NAVI14:
 248         case CHIP_SIENNA_CICHLID:
 249         case CHIP_NAVY_FLOUNDER:
 250         case CHIP_VANGOGH:
 251         case CHIP_DIMGREY_CAVEFISH:
 252         case CHIP_BEIGE_GOBY:
 253                 pm->pmf = &kfd_v9_pm_funcs;
 254                 break;
 255         case CHIP_ALDEBARAN:
 256                 pm->pmf = &kfd_aldebaran_pm_funcs;
 257                 break;
 258         default:
 259                 WARN(1, "Unexpected ASIC family %u",
 260                      dqm->dev->device_info->asic_family);
 261                 return -EINVAL;
 262         }
 263
 264         pm->dqm = dqm;
 265         mutex_init(&pm->lock);
 266         pm->priv_queue = kernel_queue_init(dqm->dev, KFD_QUEUE_TYPE_HIQ);
 267         if (!pm->priv_queue) {
 268                 mutex_destroy(&pm->lock);
 269                 return -ENOMEM;
 270         }
 271         pm->allocated = false;
 272
 273         return 0;
 274 }
 275
 276 void pm_uninit(struct packet_manager *pm, bool hanging)
 277 {
 278         mutex_destroy(&pm->lock);
 279         kernel_queue_uninit(pm->priv_queue, hanging);
 280 }
 281
 282 int pm_send_set_resources(struct packet_manager *pm,
 283                                 struct scheduling_resources *res)
 284 {
 285         uint32_t *buffer, size;
 286         int retval = 0;
 287
 288         size = pm->pmf->set_resources_size;
 289         mutex_lock(&pm->lock);
 290         kq_acquire_packet_buffer(pm->priv_queue,
 291                                         size / sizeof(uint32_t),
 292                                         (unsigned int **)&buffer);
 293         if (!buffer) {
 294                 pr_err("Failed to allocate buffer on kernel queue\n");
 295                 retval = -ENOMEM;
 296                 goto out;
 297         }
 298
 299         retval = pm->pmf->set_resources(pm, buffer, res);
 300         if (!retval)
 301                 kq_submit_packet(pm->priv_queue);
 302         else
 303                 kq_rollback_packet(pm->priv_queue);
 304
 305 out:
 306         mutex_unlock(&pm->lock);
 307
 308         return retval;
 309 }
 310
 311 int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues)
 312 {
 313         uint64_t rl_gpu_ib_addr;
 314         uint32_t *rl_buffer;
 315         size_t rl_ib_size, packet_size_dwords;
 316         int retval;
 317
 318         retval = pm_create_runlist_ib(pm, dqm_queues, &rl_gpu_ib_addr,
 319                                         &rl_ib_size);
 320         if (retval)
 321                 goto fail_create_runlist_ib;
 322
 323         pr_debug("runlist IB address: 0x%llX\n", rl_gpu_ib_addr);
 324
 325         packet_size_dwords = pm->pmf->runlist_size / sizeof(uint32_t);
 326         mutex_lock(&pm->lock);
 327
 328         retval = kq_acquire_packet_buffer(pm->priv_queue,
 329                                         packet_size_dwords, &rl_buffer);
 330         if (retval)
 331                 goto fail_acquire_packet_buffer;
 332
 333         retval = pm->pmf->runlist(pm, rl_buffer, rl_gpu_ib_addr,
 334                                         rl_ib_size / sizeof(uint32_t), false);
 335         if (retval)
 336                 goto fail_create_runlist;
 337
 338         kq_submit_packet(pm->priv_queue);
 339
 340         mutex_unlock(&pm->lock);
 341
 342         return retval;
 343
 344 fail_create_runlist:
 345         kq_rollback_packet(pm->priv_queue);
 346 fail_acquire_packet_buffer:
 347         mutex_unlock(&pm->lock);
 348 fail_create_runlist_ib:
 349         pm_release_ib(pm);
 350         return retval;
 351 }
 352
 353 int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address,
 354                         uint64_t fence_value)
 355 {
 356         uint32_t *buffer, size;
 357         int retval = 0;
 358
 359         if (WARN_ON(!fence_address))
 360                 return -EFAULT;
 361
 362         size = pm->pmf->query_status_size;
 363         mutex_lock(&pm->lock);
 364         kq_acquire_packet_buffer(pm->priv_queue,
 365                         size / sizeof(uint32_t), (unsigned int **)&buffer);
 366         if (!buffer) {
 367                 pr_err("Failed to allocate buffer on kernel queue\n");
 368                 retval = -ENOMEM;
 369                 goto out;
 370         }
 371
 372         retval = pm->pmf->query_status(pm, buffer, fence_address, fence_value);
 373         if (!retval)
 374                 kq_submit_packet(pm->priv_queue);
 375         else
 376                 kq_rollback_packet(pm->priv_queue);
 377
 378 out:
 379         mutex_unlock(&pm->lock);
 380         return retval;
 381 }
 382
 383 int pm_send_unmap_queue(struct packet_manager *pm, enum kfd_queue_type type,
 384                         enum kfd_unmap_queues_filter filter,
 385                         uint32_t filter_param, bool reset,
 386                         unsigned int sdma_engine)
 387 {
 388         uint32_t *buffer, size;
 389         int retval = 0;
 390
 391         size = pm->pmf->unmap_queues_size;
 392         mutex_lock(&pm->lock);
 393         kq_acquire_packet_buffer(pm->priv_queue,
 394                         size / sizeof(uint32_t), (unsigned int **)&buffer);
 395         if (!buffer) {
 396                 pr_err("Failed to allocate buffer on kernel queue\n");
 397                 retval = -ENOMEM;
 398                 goto out;
 399         }
 400
 401         retval = pm->pmf->unmap_queues(pm, buffer, type, filter, filter_param,
 402                                        reset, sdma_engine);
 403         if (!retval)
 404                 kq_submit_packet(pm->priv_queue);
 405         else
 406                 kq_rollback_packet(pm->priv_queue);
 407
 408 out:
 409         mutex_unlock(&pm->lock);
 410         return retval;
 411 }
 412
 413 void pm_release_ib(struct packet_manager *pm)
 414 {
 415         mutex_lock(&pm->lock);
 416         if (pm->allocated) {
 417                 kfd_gtt_sa_free(pm->dqm->dev, pm->ib_buffer_obj);
 418                 pm->allocated = false;
 419         }
 420         mutex_unlock(&pm->lock);
 421 }
 422
 423 #if defined(CONFIG_DEBUG_FS)
 424
 425 int pm_debugfs_runlist(struct seq_file *m, void *data)
 426 {
 427         struct packet_manager *pm = data;
 428
 429         mutex_lock(&pm->lock);
 430
 431         if (!pm->allocated) {
 432                 seq_puts(m, "  No active runlist\n");
 433                 goto out;
 434         }
 435
 436         seq_hex_dump(m, "  ", DUMP_PREFIX_OFFSET, 32, 4,
 437                      pm->ib_buffer_obj->cpu_ptr, pm->ib_size_bytes, false);
 438
 439 out:
 440         mutex_unlock(&pm->lock);
 441         return 0;
 442 }
 443
 444 int pm_debugfs_hang_hws(struct packet_manager *pm)
 445 {
 446         uint32_t *buffer, size;
 447         int r = 0;
 448
 449         size = pm->pmf->query_status_size;
 450         mutex_lock(&pm->lock);
 451         kq_acquire_packet_buffer(pm->priv_queue,
 452                         size / sizeof(uint32_t), (unsigned int **)&buffer);
 453         if (!buffer) {
 454                 pr_err("Failed to allocate buffer on kernel queue\n");
 455                 r = -ENOMEM;
 456                 goto out;
 457         }
 458         memset(buffer, 0x55, size);
 459         kq_submit_packet(pm->priv_queue);
 460
 461         pr_info("Submitting %x %x %x %x %x %x %x to HIQ to hang the HWS.",
 462                 buffer[0], buffer[1], buffer[2], buffer[3],
 463                 buffer[4], buffer[5], buffer[6]);
 464 out:
 465         mutex_unlock(&pm->lock);
 466         return r;
 467 }
 468
 469
 470 #endif