drivers/compress/mlx5/mlx5_compress.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2021 Mellanox Technologies, Ltd
   3  */
   4
   5 #include <rte_malloc.h>
   6 #include <rte_log.h>
   7 #include <rte_errno.h>
   8 #include <rte_pci.h>
   9 #include <rte_spinlock.h>
  10 #include <rte_comp.h>
  11 #include <rte_compressdev.h>
  12 #include <rte_compressdev_pmd.h>
  13
  14 #include <mlx5_glue.h>
  15 #include <mlx5_common.h>
  16 #include <mlx5_common_pci.h>
  17 #include <mlx5_devx_cmds.h>
  18 #include <mlx5_common_os.h>
  19 #include <mlx5_common_devx.h>
  20 #include <mlx5_common_mr.h>
  21 #include <mlx5_prm.h>
  22
  23 #include "mlx5_compress_utils.h"
  24
  25 #define MLX5_COMPRESS_DRIVER_NAME mlx5_compress
  26 #define MLX5_COMPRESS_MAX_QPS 1024
  27 #define MLX5_COMP_MAX_WIN_SIZE_CONF 6u
  28
  29 struct mlx5_compress_xform {
  30         LIST_ENTRY(mlx5_compress_xform) next;
  31         enum rte_comp_xform_type type;
  32         enum rte_comp_checksum_type csum_type;
  33         uint32_t opcode;
  34         uint32_t gga_ctrl1; /* BE. */
  35 };
  36
  37 struct mlx5_compress_priv {
  38         TAILQ_ENTRY(mlx5_compress_priv) next;
  39         struct ibv_context *ctx; /* Device context. */
  40         struct rte_pci_device *pci_dev;
  41         struct rte_compressdev *cdev;
  42         void *uar;
  43         uint32_t pdn; /* Protection Domain number. */
  44         uint8_t min_block_size;
  45         uint8_t sq_ts_format; /* Whether SQ supports timestamp formats. */
  46         /* Minimum huffman block size supported by the device. */
  47         struct ibv_pd *pd;
  48         struct rte_compressdev_config dev_config;
  49         LIST_HEAD(xform_list, mlx5_compress_xform) xform_list;
  50         rte_spinlock_t xform_sl;
  51         struct mlx5_mr_share_cache mr_scache; /* Global shared MR cache. */
  52         volatile uint64_t *uar_addr;
  53 #ifndef RTE_ARCH_64
  54         rte_spinlock_t uar32_sl;
  55 #endif /* RTE_ARCH_64 */
  56 };
  57
  58 struct mlx5_compress_qp {
  59         uint16_t qp_id;
  60         uint16_t entries_n;
  61         uint16_t pi;
  62         uint16_t ci;
  63         struct mlx5_mr_ctrl mr_ctrl;
  64         int socket_id;
  65         struct mlx5_devx_cq cq;
  66         struct mlx5_devx_sq sq;
  67         struct mlx5_pmd_mr opaque_mr;
  68         struct rte_comp_op **ops;
  69         struct mlx5_compress_priv *priv;
  70         struct rte_compressdev_stats stats;
  71 };
  72
  73 TAILQ_HEAD(mlx5_compress_privs, mlx5_compress_priv) mlx5_compress_priv_list =
  74                                 TAILQ_HEAD_INITIALIZER(mlx5_compress_priv_list);
  75 static pthread_mutex_t priv_list_lock = PTHREAD_MUTEX_INITIALIZER;
  76
  77 int mlx5_compress_logtype;
  78
  79 static const struct rte_compressdev_capabilities mlx5_caps[] = {
  80         {
  81                 .algo = RTE_COMP_ALGO_NULL,
  82                 .comp_feature_flags = RTE_COMP_FF_ADLER32_CHECKSUM |
  83                                       RTE_COMP_FF_CRC32_CHECKSUM |
  84                                       RTE_COMP_FF_CRC32_ADLER32_CHECKSUM |
  85                                       RTE_COMP_FF_SHAREABLE_PRIV_XFORM,
  86         },
  87         {
  88                 .algo = RTE_COMP_ALGO_DEFLATE,
  89                 .comp_feature_flags = RTE_COMP_FF_ADLER32_CHECKSUM |
  90                                       RTE_COMP_FF_CRC32_CHECKSUM |
  91                                       RTE_COMP_FF_CRC32_ADLER32_CHECKSUM |
  92                                       RTE_COMP_FF_SHAREABLE_PRIV_XFORM |
  93                                       RTE_COMP_FF_HUFFMAN_FIXED |
  94                                       RTE_COMP_FF_HUFFMAN_DYNAMIC,
  95                 .window_size = {.min = 10, .max = 15, .increment = 1},
  96         },
  97         {
  98                 .algo = RTE_COMP_ALGO_LIST_END,
  99         }
 100 };
 101
 102 static void
 103 mlx5_compress_dev_info_get(struct rte_compressdev *dev,
 104                            struct rte_compressdev_info *info)
 105 {
 106         RTE_SET_USED(dev);
 107         if (info != NULL) {
 108                 info->max_nb_queue_pairs = MLX5_COMPRESS_MAX_QPS;
 109                 info->feature_flags = RTE_COMPDEV_FF_HW_ACCELERATED;
 110                 info->capabilities = mlx5_caps;
 111         }
 112 }
 113
 114 static int
 115 mlx5_compress_dev_configure(struct rte_compressdev *dev,
 116                             struct rte_compressdev_config *config)
 117 {
 118         struct mlx5_compress_priv *priv;
 119
 120         if (dev == NULL || config == NULL)
 121                 return -EINVAL;
 122         priv = dev->data->dev_private;
 123         priv->dev_config = *config;
 124         return 0;
 125 }
 126
 127 static int
 128 mlx5_compress_dev_close(struct rte_compressdev *dev)
 129 {
 130         RTE_SET_USED(dev);
 131         return 0;
 132 }
 133
 134 static int
 135 mlx5_compress_qp_release(struct rte_compressdev *dev, uint16_t qp_id)
 136 {
 137         struct mlx5_compress_qp *qp = dev->data->queue_pairs[qp_id];
 138
 139         if (qp->sq.sq != NULL)
 140                 mlx5_devx_sq_destroy(&qp->sq);
 141         if (qp->cq.cq != NULL)
 142                 mlx5_devx_cq_destroy(&qp->cq);
 143         if (qp->opaque_mr.obj != NULL) {
 144                 void *opaq = qp->opaque_mr.addr;
 145
 146                 mlx5_common_verbs_dereg_mr(&qp->opaque_mr);
 147                 if (opaq != NULL)
 148                         rte_free(opaq);
 149         }
 150         mlx5_mr_btree_free(&qp->mr_ctrl.cache_bh);
 151         rte_free(qp);
 152         dev->data->queue_pairs[qp_id] = NULL;
 153         return 0;
 154 }
 155
 156 static void
 157 mlx5_compress_init_sq(struct mlx5_compress_qp *qp)
 158 {
 159         volatile struct mlx5_gga_wqe *restrict wqe =
 160                                     (volatile struct mlx5_gga_wqe *)qp->sq.wqes;
 161         volatile struct mlx5_gga_compress_opaque *opaq = qp->opaque_mr.addr;
 162         const uint32_t sq_ds = rte_cpu_to_be_32((qp->sq.sq->id << 8) | 4u);
 163         const uint32_t flags = RTE_BE32(MLX5_COMP_ALWAYS <<
 164                                         MLX5_COMP_MODE_OFFSET);
 165         const uint32_t opaq_lkey = rte_cpu_to_be_32(qp->opaque_mr.lkey);
 166         int i;
 167
 168         /* All the next fields state should stay constant. */
 169         for (i = 0; i < qp->entries_n; ++i, ++wqe) {
 170                 wqe->sq_ds = sq_ds;
 171                 wqe->flags = flags;
 172                 wqe->opaque_lkey = opaq_lkey;
 173                 wqe->opaque_vaddr = rte_cpu_to_be_64
 174                                                 ((uint64_t)(uintptr_t)&opaq[i]);
 175         }
 176 }
 177
 178 static int
 179 mlx5_compress_qp_setup(struct rte_compressdev *dev, uint16_t qp_id,
 180                        uint32_t max_inflight_ops, int socket_id)
 181 {
 182         struct mlx5_compress_priv *priv = dev->data->dev_private;
 183         struct mlx5_compress_qp *qp;
 184         struct mlx5_devx_cq_attr cq_attr = {
 185                 .uar_page_id = mlx5_os_get_devx_uar_page_id(priv->uar),
 186         };
 187         struct mlx5_devx_create_sq_attr sq_attr = {
 188                 .user_index = qp_id,
 189                 .wq_attr = (struct mlx5_devx_wq_attr){
 190                         .pd = priv->pdn,
 191                         .uar_page = mlx5_os_get_devx_uar_page_id(priv->uar),
 192                 },
 193         };
 194         struct mlx5_devx_modify_sq_attr modify_attr = {
 195                 .state = MLX5_SQC_STATE_RDY,
 196         };
 197         uint32_t log_ops_n = rte_log2_u32(max_inflight_ops);
 198         uint32_t alloc_size = sizeof(*qp);
 199         void *opaq_buf;
 200         int ret;
 201
 202         alloc_size = RTE_ALIGN(alloc_size, RTE_CACHE_LINE_SIZE);
 203         alloc_size += sizeof(struct rte_comp_op *) * (1u << log_ops_n);
 204         qp = rte_zmalloc_socket(__func__, alloc_size, RTE_CACHE_LINE_SIZE,
 205                                 socket_id);
 206         if (qp == NULL) {
 207                 DRV_LOG(ERR, "Failed to allocate qp memory.");
 208                 rte_errno = ENOMEM;
 209                 return -rte_errno;
 210         }
 211         dev->data->queue_pairs[qp_id] = qp;
 212         opaq_buf = rte_calloc(__func__, 1u << log_ops_n,
 213                               sizeof(struct mlx5_gga_compress_opaque),
 214                               sizeof(struct mlx5_gga_compress_opaque));
 215         if (opaq_buf == NULL) {
 216                 DRV_LOG(ERR, "Failed to allocate opaque memory.");
 217                 rte_errno = ENOMEM;
 218                 goto err;
 219         }
 220         if (mlx5_mr_btree_init(&qp->mr_ctrl.cache_bh, MLX5_MR_BTREE_CACHE_N,
 221                                priv->dev_config.socket_id)) {
 222                 DRV_LOG(ERR, "Cannot allocate MR Btree for qp %u.",
 223                         (uint32_t)qp_id);
 224                 rte_errno = ENOMEM;
 225                 goto err;
 226         }
 227         qp->entries_n = 1 << log_ops_n;
 228         qp->socket_id = socket_id;
 229         qp->qp_id = qp_id;
 230         qp->priv = priv;
 231         qp->ops = (struct rte_comp_op **)RTE_ALIGN((uintptr_t)(qp + 1),
 232                                                    RTE_CACHE_LINE_SIZE);
 233         if (mlx5_common_verbs_reg_mr(priv->pd, opaq_buf, qp->entries_n *
 234                                         sizeof(struct mlx5_gga_compress_opaque),
 235                                                          &qp->opaque_mr) != 0) {
 236                 rte_free(opaq_buf);
 237                 DRV_LOG(ERR, "Failed to register opaque MR.");
 238                 rte_errno = ENOMEM;
 239                 goto err;
 240         }
 241         ret = mlx5_devx_cq_create(priv->ctx, &qp->cq, log_ops_n, &cq_attr,
 242                                   socket_id);
 243         if (ret != 0) {
 244                 DRV_LOG(ERR, "Failed to create CQ.");
 245                 goto err;
 246         }
 247         sq_attr.cqn = qp->cq.cq->id;
 248         sq_attr.ts_format = mlx5_ts_format_conv(priv->sq_ts_format);
 249         ret = mlx5_devx_sq_create(priv->ctx, &qp->sq, log_ops_n, &sq_attr,
 250                                   socket_id);
 251         if (ret != 0) {
 252                 DRV_LOG(ERR, "Failed to create SQ.");
 253                 goto err;
 254         }
 255         mlx5_compress_init_sq(qp);
 256         ret = mlx5_devx_cmd_modify_sq(qp->sq.sq, &modify_attr);
 257         if (ret != 0) {
 258                 DRV_LOG(ERR, "Can't change SQ state to ready.");
 259                 goto err;
 260         }
 261         DRV_LOG(INFO, "QP %u: SQN=0x%X CQN=0x%X entries num = %u",
 262                 (uint32_t)qp_id, qp->sq.sq->id, qp->cq.cq->id, qp->entries_n);
 263         return 0;
 264 err:
 265         mlx5_compress_qp_release(dev, qp_id);
 266         return -1;
 267 }
 268
 269 static int
 270 mlx5_compress_xform_free(struct rte_compressdev *dev, void *xform)
 271 {
 272         struct mlx5_compress_priv *priv = dev->data->dev_private;
 273
 274         rte_spinlock_lock(&priv->xform_sl);
 275         LIST_REMOVE((struct mlx5_compress_xform *)xform, next);
 276         rte_spinlock_unlock(&priv->xform_sl);
 277         rte_free(xform);
 278         return 0;
 279 }
 280
 281 static int
 282 mlx5_compress_xform_create(struct rte_compressdev *dev,
 283                            const struct rte_comp_xform *xform,
 284                            void **private_xform)
 285 {
 286         struct mlx5_compress_priv *priv = dev->data->dev_private;
 287         struct mlx5_compress_xform *xfrm;
 288         uint32_t size;
 289
 290         if (xform->type == RTE_COMP_COMPRESS && xform->compress.level ==
 291                                                           RTE_COMP_LEVEL_NONE) {
 292                 DRV_LOG(ERR, "Non-compressed block is not supported.");
 293                 return -ENOTSUP;
 294         }
 295         if ((xform->type == RTE_COMP_COMPRESS && xform->compress.hash_algo !=
 296              RTE_COMP_HASH_ALGO_NONE) || (xform->type == RTE_COMP_DECOMPRESS &&
 297                       xform->decompress.hash_algo != RTE_COMP_HASH_ALGO_NONE)) {
 298                 DRV_LOG(ERR, "SHA is not supported.");
 299                 return -ENOTSUP;
 300         }
 301         xfrm = rte_zmalloc_socket(__func__, sizeof(*xfrm), 0,
 302                                                     priv->dev_config.socket_id);
 303         if (xfrm == NULL)
 304                 return -ENOMEM;
 305         xfrm->opcode = MLX5_OPCODE_MMO;
 306         xfrm->type = xform->type;
 307         switch (xform->type) {
 308         case RTE_COMP_COMPRESS:
 309                 switch (xform->compress.algo) {
 310                 case RTE_COMP_ALGO_NULL:
 311                         xfrm->opcode += MLX5_OPC_MOD_MMO_DMA <<
 312                                                         WQE_CSEG_OPC_MOD_OFFSET;
 313                         break;
 314                 case RTE_COMP_ALGO_DEFLATE:
 315                         size = 1 << xform->compress.window_size;
 316                         size /= MLX5_GGA_COMP_WIN_SIZE_UNITS;
 317                         xfrm->gga_ctrl1 += RTE_MIN(rte_log2_u32(size),
 318                                          MLX5_COMP_MAX_WIN_SIZE_CONF) <<
 319                                            WQE_GGA_COMP_WIN_SIZE_OFFSET;
 320                         if (xform->compress.level == RTE_COMP_LEVEL_PMD_DEFAULT)
 321                                 size = MLX5_GGA_COMP_LOG_BLOCK_SIZE_MAX;
 322                         else
 323                                 size = priv->min_block_size - 1 +
 324                                                           xform->compress.level;
 325                         xfrm->gga_ctrl1 += RTE_MIN(size,
 326                                             MLX5_GGA_COMP_LOG_BLOCK_SIZE_MAX) <<
 327                                                  WQE_GGA_COMP_BLOCK_SIZE_OFFSET;
 328                         xfrm->opcode += MLX5_OPC_MOD_MMO_COMP <<
 329                                                         WQE_CSEG_OPC_MOD_OFFSET;
 330                         size = xform->compress.deflate.huffman ==
 331                                                       RTE_COMP_HUFFMAN_DYNAMIC ?
 332                                             MLX5_GGA_COMP_LOG_DYNAMIC_SIZE_MAX :
 333                                              MLX5_GGA_COMP_LOG_DYNAMIC_SIZE_MIN;
 334                         xfrm->gga_ctrl1 += size <<
 335                                                WQE_GGA_COMP_DYNAMIC_SIZE_OFFSET;
 336                         break;
 337                 default:
 338                         goto err;
 339                 }
 340                 xfrm->csum_type = xform->compress.chksum;
 341                 break;
 342         case RTE_COMP_DECOMPRESS:
 343                 switch (xform->decompress.algo) {
 344                 case RTE_COMP_ALGO_NULL:
 345                         xfrm->opcode += MLX5_OPC_MOD_MMO_DMA <<
 346                                                         WQE_CSEG_OPC_MOD_OFFSET;
 347                         break;
 348                 case RTE_COMP_ALGO_DEFLATE:
 349                         xfrm->opcode += MLX5_OPC_MOD_MMO_DECOMP <<
 350                                                         WQE_CSEG_OPC_MOD_OFFSET;
 351                         break;
 352                 default:
 353                         goto err;
 354                 }
 355                 xfrm->csum_type = xform->decompress.chksum;
 356                 break;
 357         default:
 358                 DRV_LOG(ERR, "Algorithm %u is not supported.", xform->type);
 359                 goto err;
 360         }
 361         DRV_LOG(DEBUG, "New xform: gga ctrl1 = 0x%08X opcode = 0x%08X csum "
 362                 "type = %d.", xfrm->gga_ctrl1, xfrm->opcode, xfrm->csum_type);
 363         xfrm->gga_ctrl1 = rte_cpu_to_be_32(xfrm->gga_ctrl1);
 364         rte_spinlock_lock(&priv->xform_sl);
 365         LIST_INSERT_HEAD(&priv->xform_list, xfrm, next);
 366         rte_spinlock_unlock(&priv->xform_sl);
 367         *private_xform = xfrm;
 368         return 0;
 369 err:
 370         rte_free(xfrm);
 371         return -ENOTSUP;
 372 }
 373
 374 static void
 375 mlx5_compress_dev_stop(struct rte_compressdev *dev)
 376 {
 377         RTE_SET_USED(dev);
 378 }
 379
 380 static int
 381 mlx5_compress_dev_start(struct rte_compressdev *dev)
 382 {
 383         RTE_SET_USED(dev);
 384         return 0;
 385 }
 386
 387 static void
 388 mlx5_compress_stats_get(struct rte_compressdev *dev,
 389                 struct rte_compressdev_stats *stats)
 390 {
 391         int qp_id;
 392
 393         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 394                 struct mlx5_compress_qp *qp = dev->data->queue_pairs[qp_id];
 395
 396                 stats->enqueued_count += qp->stats.enqueued_count;
 397                 stats->dequeued_count += qp->stats.dequeued_count;
 398                 stats->enqueue_err_count += qp->stats.enqueue_err_count;
 399                 stats->dequeue_err_count += qp->stats.dequeue_err_count;
 400         }
 401 }
 402
 403 static void
 404 mlx5_compress_stats_reset(struct rte_compressdev *dev)
 405 {
 406         int qp_id;
 407
 408         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 409                 struct mlx5_compress_qp *qp = dev->data->queue_pairs[qp_id];
 410
 411                 memset(&qp->stats, 0, sizeof(qp->stats));
 412         }
 413 }
 414
 415 static struct rte_compressdev_ops mlx5_compress_ops = {
 416         .dev_configure          = mlx5_compress_dev_configure,
 417         .dev_start              = mlx5_compress_dev_start,
 418         .dev_stop               = mlx5_compress_dev_stop,
 419         .dev_close              = mlx5_compress_dev_close,
 420         .dev_infos_get          = mlx5_compress_dev_info_get,
 421         .stats_get              = mlx5_compress_stats_get,
 422         .stats_reset            = mlx5_compress_stats_reset,
 423         .queue_pair_setup       = mlx5_compress_qp_setup,
 424         .queue_pair_release     = mlx5_compress_qp_release,
 425         .private_xform_create   = mlx5_compress_xform_create,
 426         .private_xform_free     = mlx5_compress_xform_free,
 427         .stream_create          = NULL,
 428         .stream_free            = NULL,
 429 };
 430
 431 static __rte_always_inline uint32_t
 432 mlx5_compress_dseg_set(struct mlx5_compress_qp *qp,
 433                        volatile struct mlx5_wqe_dseg *restrict dseg,
 434                        struct rte_mbuf *restrict mbuf,
 435                        uint32_t offset, uint32_t len)
 436 {
 437         uintptr_t addr = rte_pktmbuf_mtod_offset(mbuf, uintptr_t, offset);
 438
 439         dseg->bcount = rte_cpu_to_be_32(len);
 440         dseg->lkey = mlx5_mr_addr2mr_bh(qp->priv->pd, 0, &qp->priv->mr_scache,
 441                                         &qp->mr_ctrl, addr,
 442                                         !!(mbuf->ol_flags & EXT_ATTACHED_MBUF));
 443         dseg->pbuf = rte_cpu_to_be_64(addr);
 444         return dseg->lkey;
 445 }
 446
 447 /*
 448  * Provide safe 64bit store operation to mlx5 UAR region for both 32bit and
 449  * 64bit architectures.
 450  */
 451 static __rte_always_inline void
 452 mlx5_compress_uar_write(uint64_t val, struct mlx5_compress_priv *priv)
 453 {
 454 #ifdef RTE_ARCH_64
 455         *priv->uar_addr = val;
 456 #else /* !RTE_ARCH_64 */
 457         rte_spinlock_lock(&priv->uar32_sl);
 458         *(volatile uint32_t *)priv->uar_addr = val;
 459         rte_io_wmb();
 460         *((volatile uint32_t *)priv->uar_addr + 1) = val >> 32;
 461         rte_spinlock_unlock(&priv->uar32_sl);
 462 #endif
 463 }
 464
 465 static uint16_t
 466 mlx5_compress_enqueue_burst(void *queue_pair, struct rte_comp_op **ops,
 467                             uint16_t nb_ops)
 468 {
 469         struct mlx5_compress_qp *qp = queue_pair;
 470         volatile struct mlx5_gga_wqe *wqes = (volatile struct mlx5_gga_wqe *)
 471                                                               qp->sq.wqes, *wqe;
 472         struct mlx5_compress_xform *xform;
 473         struct rte_comp_op *op;
 474         uint16_t mask = qp->entries_n - 1;
 475         uint16_t remain = qp->entries_n - (qp->pi - qp->ci);
 476         uint16_t idx;
 477         bool invalid;
 478
 479         if (remain < nb_ops)
 480                 nb_ops = remain;
 481         else
 482                 remain = nb_ops;
 483         if (unlikely(remain == 0))
 484                 return 0;
 485         do {
 486                 idx = qp->pi & mask;
 487                 wqe = &wqes[idx];
 488                 rte_prefetch0(&wqes[(qp->pi + 1) & mask]);
 489                 op = *ops++;
 490                 xform = op->private_xform;
 491                 /*
 492                  * Check operation arguments and error cases:
 493                  *   - Operation type must be state-less.
 494                  *   - Compress operation flush flag must be FULL or FINAL.
 495                  *   - Source and destination buffers must be mapped internally.
 496                  */
 497                 invalid = op->op_type != RTE_COMP_OP_STATELESS ||
 498                                             (xform->type == RTE_COMP_COMPRESS &&
 499                                           op->flush_flag < RTE_COMP_FLUSH_FULL);
 500                 if (unlikely(invalid ||
 501                              (mlx5_compress_dseg_set(qp, &wqe->gather,
 502                                                      op->m_src,
 503                                                      op->src.offset,
 504                                                      op->src.length) ==
 505                                                                   UINT32_MAX) ||
 506                              (mlx5_compress_dseg_set(qp, &wqe->scatter,
 507                                                 op->m_dst,
 508                                                 op->dst.offset,
 509                                                 rte_pktmbuf_pkt_len(op->m_dst) -
 510                                                               op->dst.offset) ==
 511                                                                  UINT32_MAX))) {
 512                         op->status = invalid ? RTE_COMP_OP_STATUS_INVALID_ARGS :
 513                                                        RTE_COMP_OP_STATUS_ERROR;
 514                         nb_ops -= remain;
 515                         if (unlikely(nb_ops == 0))
 516                                 return 0;
 517                         break;
 518                 }
 519                 wqe->gga_ctrl1 = xform->gga_ctrl1;
 520                 wqe->opcode = rte_cpu_to_be_32(xform->opcode + (qp->pi << 8));
 521                 qp->ops[idx] = op;
 522                 qp->pi++;
 523         } while (--remain);
 524         qp->stats.enqueued_count += nb_ops;
 525         rte_io_wmb();
 526         qp->sq.db_rec[MLX5_SND_DBR] = rte_cpu_to_be_32(qp->pi);
 527         rte_wmb();
 528         mlx5_compress_uar_write(*(volatile uint64_t *)wqe, qp->priv);
 529         rte_wmb();
 530         return nb_ops;
 531 }
 532
 533 static void
 534 mlx5_compress_dump_err_objs(volatile uint32_t *cqe, volatile uint32_t *wqe,
 535                              volatile uint32_t *opaq)
 536 {
 537         size_t i;
 538
 539         DRV_LOG(ERR, "Error cqe:");
 540         for (i = 0; i < sizeof(struct mlx5_err_cqe) >> 2; i += 4)
 541                 DRV_LOG(ERR, "%08X %08X %08X %08X", cqe[i], cqe[i + 1],
 542                         cqe[i + 2], cqe[i + 3]);
 543         DRV_LOG(ERR, "\nError wqe:");
 544         for (i = 0; i < sizeof(struct mlx5_gga_wqe) >> 2; i += 4)
 545                 DRV_LOG(ERR, "%08X %08X %08X %08X", wqe[i], wqe[i + 1],
 546                         wqe[i + 2], wqe[i + 3]);
 547         DRV_LOG(ERR, "\nError opaq:");
 548         for (i = 0; i < sizeof(struct mlx5_gga_compress_opaque) >> 2; i += 4)
 549                 DRV_LOG(ERR, "%08X %08X %08X %08X", opaq[i], opaq[i + 1],
 550                         opaq[i + 2], opaq[i + 3]);
 551 }
 552
 553 static void
 554 mlx5_compress_cqe_err_handle(struct mlx5_compress_qp *qp,
 555                              struct rte_comp_op *op)
 556 {
 557         const uint32_t idx = qp->ci & (qp->entries_n - 1);
 558         volatile struct mlx5_err_cqe *cqe = (volatile struct mlx5_err_cqe *)
 559                                                               &qp->cq.cqes[idx];
 560         volatile struct mlx5_gga_wqe *wqes = (volatile struct mlx5_gga_wqe *)
 561                                                                     qp->sq.wqes;
 562         volatile struct mlx5_gga_compress_opaque *opaq = qp->opaque_mr.addr;
 563
 564         op->status = RTE_COMP_OP_STATUS_ERROR;
 565         op->consumed = 0;
 566         op->produced = 0;
 567         op->output_chksum = 0;
 568         op->debug_status = rte_be_to_cpu_32(opaq[idx].syndrom) |
 569                               ((uint64_t)rte_be_to_cpu_32(cqe->syndrome) << 32);
 570         mlx5_compress_dump_err_objs((volatile uint32_t *)cqe,
 571                                  (volatile uint32_t *)&wqes[idx],
 572                                  (volatile uint32_t *)&opaq[idx]);
 573         qp->stats.dequeue_err_count++;
 574 }
 575
 576 static uint16_t
 577 mlx5_compress_dequeue_burst(void *queue_pair, struct rte_comp_op **ops,
 578                             uint16_t nb_ops)
 579 {
 580         struct mlx5_compress_qp *qp = queue_pair;
 581         volatile struct mlx5_compress_xform *restrict xform;
 582         volatile struct mlx5_cqe *restrict cqe;
 583         volatile struct mlx5_gga_compress_opaque *opaq = qp->opaque_mr.addr;
 584         struct rte_comp_op *restrict op;
 585         const unsigned int cq_size = qp->entries_n;
 586         const unsigned int mask = cq_size - 1;
 587         uint32_t idx;
 588         uint32_t next_idx = qp->ci & mask;
 589         const uint16_t max = RTE_MIN((uint16_t)(qp->pi - qp->ci), nb_ops);
 590         uint16_t i = 0;
 591         int ret;
 592
 593         if (unlikely(max == 0))
 594                 return 0;
 595         do {
 596                 idx = next_idx;
 597                 next_idx = (qp->ci + 1) & mask;
 598                 rte_prefetch0(&qp->cq.cqes[next_idx]);
 599                 rte_prefetch0(qp->ops[next_idx]);
 600                 op = qp->ops[idx];
 601                 cqe = &qp->cq.cqes[idx];
 602                 ret = check_cqe(cqe, cq_size, qp->ci);
 603                 /*
 604                  * Be sure owner read is done before any other cookie field or
 605                  * opaque field.
 606                  */
 607                 rte_io_rmb();
 608                 if (unlikely(ret != MLX5_CQE_STATUS_SW_OWN)) {
 609                         if (likely(ret == MLX5_CQE_STATUS_HW_OWN))
 610                                 break;
 611                         mlx5_compress_cqe_err_handle(qp, op);
 612                 } else {
 613                         xform = op->private_xform;
 614                         op->status = RTE_COMP_OP_STATUS_SUCCESS;
 615                         op->consumed = op->src.length;
 616                         op->produced = rte_be_to_cpu_32(cqe->byte_cnt);
 617                         MLX5_ASSERT(cqe->byte_cnt ==
 618                                     opaq[idx].scattered_length);
 619                         switch (xform->csum_type) {
 620                         case RTE_COMP_CHECKSUM_CRC32:
 621                                 op->output_chksum = (uint64_t)rte_be_to_cpu_32
 622                                                     (opaq[idx].crc32);
 623                                 break;
 624                         case RTE_COMP_CHECKSUM_ADLER32:
 625                                 op->output_chksum = (uint64_t)rte_be_to_cpu_32
 626                                             (opaq[idx].adler32) << 32;
 627                                 break;
 628                         case RTE_COMP_CHECKSUM_CRC32_ADLER32:
 629                                 op->output_chksum = (uint64_t)rte_be_to_cpu_32
 630                                                              (opaq[idx].crc32) |
 631                                                      ((uint64_t)rte_be_to_cpu_32
 632                                                      (opaq[idx].adler32) << 32);
 633                                 break;
 634                         default:
 635                                 break;
 636                         }
 637                 }
 638                 ops[i++] = op;
 639                 qp->ci++;
 640         } while (i < max);
 641         if (likely(i != 0)) {
 642                 rte_io_wmb();
 643                 qp->cq.db_rec[0] = rte_cpu_to_be_32(qp->ci);
 644                 qp->stats.dequeued_count += i;
 645         }
 646         return i;
 647 }
 648
 649 static void
 650 mlx5_compress_hw_global_release(struct mlx5_compress_priv *priv)
 651 {
 652         if (priv->pd != NULL) {
 653                 claim_zero(mlx5_glue->dealloc_pd(priv->pd));
 654                 priv->pd = NULL;
 655         }
 656         if (priv->uar != NULL) {
 657                 mlx5_glue->devx_free_uar(priv->uar);
 658                 priv->uar = NULL;
 659         }
 660 }
 661
 662 static int
 663 mlx5_compress_pd_create(struct mlx5_compress_priv *priv)
 664 {
 665 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
 666         struct mlx5dv_obj obj;
 667         struct mlx5dv_pd pd_info;
 668         int ret;
 669
 670         priv->pd = mlx5_glue->alloc_pd(priv->ctx);
 671         if (priv->pd == NULL) {
 672                 DRV_LOG(ERR, "Failed to allocate PD.");
 673                 return errno ? -errno : -ENOMEM;
 674         }
 675         obj.pd.in = priv->pd;
 676         obj.pd.out = &pd_info;
 677         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_PD);
 678         if (ret != 0) {
 679                 DRV_LOG(ERR, "Fail to get PD object info.");
 680                 mlx5_glue->dealloc_pd(priv->pd);
 681                 priv->pd = NULL;
 682                 return -errno;
 683         }
 684         priv->pdn = pd_info.pdn;
 685         return 0;
 686 #else
 687         (void)priv;
 688         DRV_LOG(ERR, "Cannot get pdn - no DV support.");
 689         return -ENOTSUP;
 690 #endif /* HAVE_IBV_FLOW_DV_SUPPORT */
 691 }
 692
 693 static int
 694 mlx5_compress_hw_global_prepare(struct mlx5_compress_priv *priv)
 695 {
 696         if (mlx5_compress_pd_create(priv) != 0)
 697                 return -1;
 698         priv->uar = mlx5_devx_alloc_uar(priv->ctx, -1);
 699         if (priv->uar == NULL || mlx5_os_get_devx_uar_reg_addr(priv->uar) ==
 700             NULL) {
 701                 rte_errno = errno;
 702                 claim_zero(mlx5_glue->dealloc_pd(priv->pd));
 703                 DRV_LOG(ERR, "Failed to allocate UAR.");
 704                 return -1;
 705         }
 706         priv->uar_addr = mlx5_os_get_devx_uar_reg_addr(priv->uar);
 707         MLX5_ASSERT(priv->uar_addr);
 708 #ifndef RTE_ARCH_64
 709         rte_spinlock_init(&priv->uar32_sl);
 710 #endif /* RTE_ARCH_64 */
 711         return 0;
 712 }
 713
 714 /**
 715  * DPDK callback to register a PCI device.
 716  *
 717  * This function spawns compress device out of a given PCI device.
 718  *
 719  * @param[in] pci_drv
 720  *   PCI driver structure (mlx5_compress_driver).
 721  * @param[in] pci_dev
 722  *   PCI device information.
 723  *
 724  * @return
 725  *   0 on success, 1 to skip this driver, a negative errno value otherwise
 726  *   and rte_errno is set.
 727  */
 728 static int
 729 mlx5_compress_pci_probe(struct rte_pci_driver *pci_drv,
 730                         struct rte_pci_device *pci_dev)
 731 {
 732         struct ibv_device *ibv;
 733         struct rte_compressdev *cdev;
 734         struct ibv_context *ctx;
 735         struct mlx5_compress_priv *priv;
 736         struct mlx5_hca_attr att = { 0 };
 737         struct rte_compressdev_pmd_init_params init_params = {
 738                 .name = "",
 739                 .socket_id = pci_dev->device.numa_node,
 740         };
 741
 742         RTE_SET_USED(pci_drv);
 743         if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
 744                 DRV_LOG(ERR, "Non-primary process type is not supported.");
 745                 rte_errno = ENOTSUP;
 746                 return -rte_errno;
 747         }
 748         ibv = mlx5_os_get_ibv_device(&pci_dev->addr);
 749         if (ibv == NULL) {
 750                 DRV_LOG(ERR, "No matching IB device for PCI slot "
 751                         PCI_PRI_FMT ".", pci_dev->addr.domain,
 752                         pci_dev->addr.bus, pci_dev->addr.devid,
 753                         pci_dev->addr.function);
 754                 return -rte_errno;
 755         }
 756         DRV_LOG(INFO, "PCI information matches for device \"%s\".", ibv->name);
 757         ctx = mlx5_glue->dv_open_device(ibv);
 758         if (ctx == NULL) {
 759                 DRV_LOG(ERR, "Failed to open IB device \"%s\".", ibv->name);
 760                 rte_errno = ENODEV;
 761                 return -rte_errno;
 762         }
 763         if (mlx5_devx_cmd_query_hca_attr(ctx, &att) != 0 ||
 764             att.mmo_compress_en == 0 || att.mmo_decompress_en == 0 ||
 765             att.mmo_dma_en == 0) {
 766                 DRV_LOG(ERR, "Not enough capabilities to support compress "
 767                         "operations, maybe old FW/OFED version?");
 768                 claim_zero(mlx5_glue->close_device(ctx));
 769                 rte_errno = ENOTSUP;
 770                 return -ENOTSUP;
 771         }
 772         cdev = rte_compressdev_pmd_create(ibv->name, &pci_dev->device,
 773                                           sizeof(*priv), &init_params);
 774         if (cdev == NULL) {
 775                 DRV_LOG(ERR, "Failed to create device \"%s\".", ibv->name);
 776                 claim_zero(mlx5_glue->close_device(ctx));
 777                 return -ENODEV;
 778         }
 779         DRV_LOG(INFO,
 780                 "Compress device %s was created successfully.", ibv->name);
 781         cdev->dev_ops = &mlx5_compress_ops;
 782         cdev->dequeue_burst = mlx5_compress_dequeue_burst;
 783         cdev->enqueue_burst = mlx5_compress_enqueue_burst;
 784         cdev->feature_flags = RTE_COMPDEV_FF_HW_ACCELERATED;
 785         priv = cdev->data->dev_private;
 786         priv->ctx = ctx;
 787         priv->pci_dev = pci_dev;
 788         priv->cdev = cdev;
 789         priv->min_block_size = att.compress_min_block_size;
 790         priv->sq_ts_format = att.sq_ts_format;
 791         if (mlx5_compress_hw_global_prepare(priv) != 0) {
 792                 rte_compressdev_pmd_destroy(priv->cdev);
 793                 claim_zero(mlx5_glue->close_device(priv->ctx));
 794                 return -1;
 795         }
 796         if (mlx5_mr_btree_init(&priv->mr_scache.cache,
 797                              MLX5_MR_BTREE_CACHE_N * 2, rte_socket_id()) != 0) {
 798                 DRV_LOG(ERR, "Failed to allocate shared cache MR memory.");
 799                 mlx5_compress_hw_global_release(priv);
 800                 rte_compressdev_pmd_destroy(priv->cdev);
 801                 claim_zero(mlx5_glue->close_device(priv->ctx));
 802                 rte_errno = ENOMEM;
 803                 return -rte_errno;
 804         }
 805         priv->mr_scache.reg_mr_cb = mlx5_common_verbs_reg_mr;
 806         priv->mr_scache.dereg_mr_cb = mlx5_common_verbs_dereg_mr;
 807         pthread_mutex_lock(&priv_list_lock);
 808         TAILQ_INSERT_TAIL(&mlx5_compress_priv_list, priv, next);
 809         pthread_mutex_unlock(&priv_list_lock);
 810         return 0;
 811 }
 812
 813 /**
 814  * DPDK callback to remove a PCI device.
 815  *
 816  * This function removes all compress devices belong to a given PCI device.
 817  *
 818  * @param[in] pci_dev
 819  *   Pointer to the PCI device.
 820  *
 821  * @return
 822  *   0 on success, the function cannot fail.
 823  */
 824 static int
 825 mlx5_compress_pci_remove(struct rte_pci_device *pdev)
 826 {
 827         struct mlx5_compress_priv *priv = NULL;
 828
 829         pthread_mutex_lock(&priv_list_lock);
 830         TAILQ_FOREACH(priv, &mlx5_compress_priv_list, next)
 831                 if (rte_pci_addr_cmp(&priv->pci_dev->addr, &pdev->addr) != 0)
 832                         break;
 833         if (priv)
 834                 TAILQ_REMOVE(&mlx5_compress_priv_list, priv, next);
 835         pthread_mutex_unlock(&priv_list_lock);
 836         if (priv) {
 837                 mlx5_mr_release_cache(&priv->mr_scache);
 838                 mlx5_compress_hw_global_release(priv);
 839                 rte_compressdev_pmd_destroy(priv->cdev);
 840                 claim_zero(mlx5_glue->close_device(priv->ctx));
 841         }
 842         return 0;
 843 }
 844
 845 static const struct rte_pci_id mlx5_compress_pci_id_map[] = {
 846         {
 847                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
 848                                 PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF)
 849         },
 850         {
 851                 .vendor_id = 0
 852         }
 853 };
 854
 855 static struct mlx5_pci_driver mlx5_compress_driver = {
 856         .driver_class = MLX5_CLASS_COMPRESS,
 857         .pci_driver = {
 858                 .driver = {
 859                         .name = RTE_STR(MLX5_COMPRESS_DRIVER_NAME),
 860                 },
 861                 .id_table = mlx5_compress_pci_id_map,
 862                 .probe = mlx5_compress_pci_probe,
 863                 .remove = mlx5_compress_pci_remove,
 864                 .drv_flags = 0,
 865         },
 866 };
 867
 868 RTE_INIT(rte_mlx5_compress_init)
 869 {
 870         mlx5_common_init();
 871         if (mlx5_glue != NULL)
 872                 mlx5_pci_driver_register(&mlx5_compress_driver);
 873 }
 874
 875 RTE_LOG_REGISTER_DEFAULT(mlx5_compress_logtype, NOTICE)
 876 RTE_PMD_EXPORT_NAME(MLX5_COMPRESS_DRIVER_NAME, __COUNTER__);
 877 RTE_PMD_REGISTER_PCI_TABLE(MLX5_COMPRESS_DRIVER_NAME, mlx5_compress_pci_id_map);
 878 RTE_PMD_REGISTER_KMOD_DEP(MLX5_COMPRESS_DRIVER_NAME, "* ib_uverbs & mlx5_core & mlx5_ib");