LXR linux/drivers/gpu/drm/amd/amdkfd/kfd_packet

   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
  30static 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
  40static 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
  84static 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
 113out:
 114        mutex_unlock(&pm->lock);
 115        return retval;
 116}
 117
 118static 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
 218int 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                pm->pmf = &kfd_vi_pm_funcs;
 230                break;
 231        case CHIP_VEGA10:
 232        case CHIP_RAVEN:
 233                pm->pmf = &kfd_v9_pm_funcs;
 234                break;
 235        default:
 236                WARN(1, "Unexpected ASIC family %u",
 237                     dqm->dev->device_info->asic_family);
 238                return -EINVAL;
 239        }
 240
 241        pm->dqm = dqm;
 242        mutex_init(&pm->lock);
 243        pm->priv_queue = kernel_queue_init(dqm->dev, KFD_QUEUE_TYPE_HIQ);
 244        if (!pm->priv_queue) {
 245                mutex_destroy(&pm->lock);
 246                return -ENOMEM;
 247        }
 248        pm->allocated = false;
 249
 250        return 0;
 251}
 252
 253void pm_uninit(struct packet_manager *pm)
 254{
 255        mutex_destroy(&pm->lock);
 256        kernel_queue_uninit(pm->priv_queue);
 257}
 258
 259int pm_send_set_resources(struct packet_manager *pm,
 260                                struct scheduling_resources *res)
 261{
 262        uint32_t *buffer, size;
 263        int retval = 0;
 264
 265        size = pm->pmf->set_resources_size;
 266        mutex_lock(&pm->lock);
 267        pm->priv_queue->ops.acquire_packet_buffer(pm->priv_queue,
 268                                        size / sizeof(uint32_t),
 269                                        (unsigned int **)&buffer);
 270        if (!buffer) {
 271                pr_err("Failed to allocate buffer on kernel queue\n");
 272                retval = -ENOMEM;
 273                goto out;
 274        }
 275
 276        retval = pm->pmf->set_resources(pm, buffer, res);
 277        if (!retval)
 278                pm->priv_queue->ops.submit_packet(pm->priv_queue);
 279        else
 280                pm->priv_queue->ops.rollback_packet(pm->priv_queue);
 281
 282out:
 283        mutex_unlock(&pm->lock);
 284
 285        return retval;
 286}
 287
 288int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues)
 289{
 290        uint64_t rl_gpu_ib_addr;
 291        uint32_t *rl_buffer;
 292        size_t rl_ib_size, packet_size_dwords;
 293        int retval;
 294
 295        retval = pm_create_runlist_ib(pm, dqm_queues, &rl_gpu_ib_addr,
 296                                        &rl_ib_size);
 297        if (retval)
 298                goto fail_create_runlist_ib;
 299
 300        pr_debug("runlist IB address: 0x%llX\n", rl_gpu_ib_addr);
 301
 302        packet_size_dwords = pm->pmf->runlist_size / sizeof(uint32_t);
 303        mutex_lock(&pm->lock);
 304
 305        retval = pm->priv_queue->ops.acquire_packet_buffer(pm->priv_queue,
 306                                        packet_size_dwords, &rl_buffer);
 307        if (retval)
 308                goto fail_acquire_packet_buffer;
 309
 310        retval = pm->pmf->runlist(pm, rl_buffer, rl_gpu_ib_addr,
 311                                        rl_ib_size / sizeof(uint32_t), false);
 312        if (retval)
 313                goto fail_create_runlist;
 314
 315        pm->priv_queue->ops.submit_packet(pm->priv_queue);
 316
 317        mutex_unlock(&pm->lock);
 318
 319        return retval;
 320
 321fail_create_runlist:
 322        pm->priv_queue->ops.rollback_packet(pm->priv_queue);
 323fail_acquire_packet_buffer:
 324        mutex_unlock(&pm->lock);
 325fail_create_runlist_ib:
 326        pm_release_ib(pm);
 327        return retval;
 328}
 329
 330int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address,
 331                        uint32_t fence_value)
 332{
 333        uint32_t *buffer, size;
 334        int retval = 0;
 335
 336        if (WARN_ON(!fence_address))
 337                return -EFAULT;
 338
 339        size = pm->pmf->query_status_size;
 340        mutex_lock(&pm->lock);
 341        pm->priv_queue->ops.acquire_packet_buffer(pm->priv_queue,
 342                        size / sizeof(uint32_t), (unsigned int **)&buffer);
 343        if (!buffer) {
 344                pr_err("Failed to allocate buffer on kernel queue\n");
 345                retval = -ENOMEM;
 346                goto out;
 347        }
 348
 349        retval = pm->pmf->query_status(pm, buffer, fence_address, fence_value);
 350        if (!retval)
 351                pm->priv_queue->ops.submit_packet(pm->priv_queue);
 352        else
 353                pm->priv_queue->ops.rollback_packet(pm->priv_queue);
 354
 355out:
 356        mutex_unlock(&pm->lock);
 357        return retval;
 358}
 359
 360int pm_send_unmap_queue(struct packet_manager *pm, enum kfd_queue_type type,
 361                        enum kfd_unmap_queues_filter filter,
 362                        uint32_t filter_param, bool reset,
 363                        unsigned int sdma_engine)
 364{
 365        uint32_t *buffer, size;
 366        int retval = 0;
 367
 368        size = pm->pmf->unmap_queues_size;
 369        mutex_lock(&pm->lock);
 370        pm->priv_queue->ops.acquire_packet_buffer(pm->priv_queue,
 371                        size / sizeof(uint32_t), (unsigned int **)&buffer);
 372        if (!buffer) {
 373                pr_err("Failed to allocate buffer on kernel queue\n");
 374                retval = -ENOMEM;
 375                goto out;
 376        }
 377
 378        retval = pm->pmf->unmap_queues(pm, buffer, type, filter, filter_param,
 379                                       reset, sdma_engine);
 380        if (!retval)
 381                pm->priv_queue->ops.submit_packet(pm->priv_queue);
 382        else
 383                pm->priv_queue->ops.rollback_packet(pm->priv_queue);
 384
 385out:
 386        mutex_unlock(&pm->lock);
 387        return retval;
 388}
 389
 390void pm_release_ib(struct packet_manager *pm)
 391{
 392        mutex_lock(&pm->lock);
 393        if (pm->allocated) {
 394                kfd_gtt_sa_free(pm->dqm->dev, pm->ib_buffer_obj);
 395                pm->allocated = false;
 396        }
 397        mutex_unlock(&pm->lock);
 398}
 399
 400#if defined(CONFIG_DEBUG_FS)
 401
 402int pm_debugfs_runlist(struct seq_file *m, void *data)
 403{
 404        struct packet_manager *pm = data;
 405
 406        mutex_lock(&pm->lock);
 407
 408        if (!pm->allocated) {
 409                seq_puts(m, "  No active runlist\n");
 410                goto out;
 411        }
 412
 413        seq_hex_dump(m, "  ", DUMP_PREFIX_OFFSET, 32, 4,
 414                     pm->ib_buffer_obj->cpu_ptr, pm->ib_size_bytes, false);
 415
 416out:
 417        mutex_unlock(&pm->lock);
 418        return 0;
 419}
 420
 421int pm_debugfs_hang_hws(struct packet_manager *pm)
 422{
 423        uint32_t *buffer, size;
 424        int r = 0;
 425
 426        size = pm->pmf->query_status_size;
 427        mutex_lock(&pm->lock);
 428        pm->priv_queue->ops.acquire_packet_buffer(pm->priv_queue,
 429                        size / sizeof(uint32_t), (unsigned int **)&buffer);
 430        if (!buffer) {
 431                pr_err("Failed to allocate buffer on kernel queue\n");
 432                r = -ENOMEM;
 433                goto out;
 434        }
 435        memset(buffer, 0x55, size);
 436        pm->priv_queue->ops.submit_packet(pm->priv_queue);
 437
 438        pr_info("Submitting %x %x %x %x %x %x %x to HIQ to hang the HWS.",
 439                buffer[0], buffer[1], buffer[2], buffer[3],
 440                buffer[4], buffer[5], buffer[6]);
 441out:
 442        mutex_unlock(&pm->lock);
 443        return r;
 444}
 445
 446
 447#endif
 448