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