drivers/net/sfc/sfc_ef10_rx.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright (c) 2016-2018 Solarflare Communications Inc.
   4  * All rights reserved.
   5  *
   6  * This software was jointly developed between OKTET Labs (under contract
   7  * for Solarflare) and Solarflare Communications, Inc.
   8  */
   9
  10 /* EF10 native datapath implementation */
  11
  12 #include <stdbool.h>
  13
  14 #include <rte_byteorder.h>
  15 #include <rte_mbuf_ptype.h>
  16 #include <rte_mbuf.h>
  17 #include <rte_io.h>
  18
  19 #include "efx.h"
  20 #include "efx_types.h"
  21 #include "efx_regs.h"
  22 #include "efx_regs_ef10.h"
  23
  24 #include "sfc_tweak.h"
  25 #include "sfc_dp_rx.h"
  26 #include "sfc_kvargs.h"
  27 #include "sfc_ef10.h"
  28
  29 #define SFC_EF10_RX_EV_ENCAP_SUPPORT    1
  30 #include "sfc_ef10_rx_ev.h"
  31
  32 #define sfc_ef10_rx_err(dpq, ...) \
  33         SFC_DP_LOG(SFC_KVARG_DATAPATH_EF10, ERR, dpq, __VA_ARGS__)
  34
  35 /**
  36  * Maximum number of descriptors/buffers in the Rx ring.
  37  * It should guarantee that corresponding event queue never overfill.
  38  * EF10 native datapath uses event queue of the same size as Rx queue.
  39  * Maximum number of events on datapath can be estimated as number of
  40  * Rx queue entries (one event per Rx buffer in the worst case) plus
  41  * Rx error and flush events.
  42  */
  43 #define SFC_EF10_RXQ_LIMIT(_ndesc) \
  44         ((_ndesc) - 1 /* head must not step on tail */ - \
  45          (SFC_EF10_EV_PER_CACHE_LINE - 1) /* max unused EvQ entries */ - \
  46          1 /* Rx error */ - 1 /* flush */)
  47
  48 struct sfc_ef10_rx_sw_desc {
  49         struct rte_mbuf                 *mbuf;
  50 };
  51
  52 struct sfc_ef10_rxq {
  53         /* Used on data path */
  54         unsigned int                    flags;
  55 #define SFC_EF10_RXQ_STARTED            0x1
  56 #define SFC_EF10_RXQ_NOT_RUNNING        0x2
  57 #define SFC_EF10_RXQ_EXCEPTION          0x4
  58 #define SFC_EF10_RXQ_RSS_HASH           0x8
  59         unsigned int                    ptr_mask;
  60         unsigned int                    prepared;
  61         unsigned int                    completed;
  62         unsigned int                    evq_read_ptr;
  63         efx_qword_t                     *evq_hw_ring;
  64         struct sfc_ef10_rx_sw_desc      *sw_ring;
  65         uint64_t                        rearm_data;
  66         uint16_t                        prefix_size;
  67
  68         /* Used on refill */
  69         uint16_t                        buf_size;
  70         unsigned int                    added;
  71         unsigned int                    max_fill_level;
  72         unsigned int                    refill_threshold;
  73         struct rte_mempool              *refill_mb_pool;
  74         efx_qword_t                     *rxq_hw_ring;
  75         volatile void                   *doorbell;
  76
  77         /* Datapath receive queue anchor */
  78         struct sfc_dp_rxq               dp;
  79 };
  80
  81 static inline struct sfc_ef10_rxq *
  82 sfc_ef10_rxq_by_dp_rxq(struct sfc_dp_rxq *dp_rxq)
  83 {
  84         return container_of(dp_rxq, struct sfc_ef10_rxq, dp);
  85 }
  86
  87 static void
  88 sfc_ef10_rx_qrefill(struct sfc_ef10_rxq *rxq)
  89 {
  90         const unsigned int ptr_mask = rxq->ptr_mask;
  91         const uint32_t buf_size = rxq->buf_size;
  92         unsigned int free_space;
  93         unsigned int bulks;
  94         void *objs[SFC_RX_REFILL_BULK];
  95         unsigned int added = rxq->added;
  96
  97         RTE_BUILD_BUG_ON(SFC_RX_REFILL_BULK % SFC_EF10_RX_WPTR_ALIGN != 0);
  98
  99         free_space = rxq->max_fill_level - (added - rxq->completed);
 100
 101         if (free_space < rxq->refill_threshold)
 102                 return;
 103
 104         bulks = free_space / RTE_DIM(objs);
 105         /* refill_threshold guarantees that bulks is positive */
 106         SFC_ASSERT(bulks > 0);
 107
 108         do {
 109                 unsigned int id;
 110                 unsigned int i;
 111
 112                 if (unlikely(rte_mempool_get_bulk(rxq->refill_mb_pool, objs,
 113                                                   RTE_DIM(objs)) < 0)) {
 114                         struct rte_eth_dev_data *dev_data =
 115                                 rte_eth_devices[rxq->dp.dpq.port_id].data;
 116
 117                         /*
 118                          * It is hardly a safe way to increment counter
 119                          * from different contexts, but all PMDs do it.
 120                          */
 121                         dev_data->rx_mbuf_alloc_failed += RTE_DIM(objs);
 122                         /* Return if we have posted nothing yet */
 123                         if (added == rxq->added)
 124                                 return;
 125                         /* Push posted */
 126                         break;
 127                 }
 128
 129                 for (i = 0, id = added & ptr_mask;
 130                      i < RTE_DIM(objs);
 131                      ++i, ++id) {
 132                         struct rte_mbuf *m = objs[i];
 133                         struct sfc_ef10_rx_sw_desc *rxd;
 134                         rte_iova_t phys_addr;
 135
 136                         MBUF_RAW_ALLOC_CHECK(m);
 137
 138                         SFC_ASSERT((id & ~ptr_mask) == 0);
 139                         rxd = &rxq->sw_ring[id];
 140                         rxd->mbuf = m;
 141
 142                         /*
 143                          * Avoid writing to mbuf. It is cheaper to do it
 144                          * when we receive packet and fill in nearby
 145                          * structure members.
 146                          */
 147
 148                         phys_addr = rte_mbuf_data_iova_default(m);
 149                         EFX_POPULATE_QWORD_2(rxq->rxq_hw_ring[id],
 150                             ESF_DZ_RX_KER_BYTE_CNT, buf_size,
 151                             ESF_DZ_RX_KER_BUF_ADDR, phys_addr);
 152                 }
 153
 154                 added += RTE_DIM(objs);
 155         } while (--bulks > 0);
 156
 157         SFC_ASSERT(rxq->added != added);
 158         rxq->added = added;
 159         sfc_ef10_rx_qpush(rxq->doorbell, added, ptr_mask);
 160 }
 161
 162 static void
 163 sfc_ef10_rx_prefetch_next(struct sfc_ef10_rxq *rxq, unsigned int next_id)
 164 {
 165         struct rte_mbuf *next_mbuf;
 166
 167         /* Prefetch next bunch of software descriptors */
 168         if ((next_id % (RTE_CACHE_LINE_SIZE / sizeof(rxq->sw_ring[0]))) == 0)
 169                 rte_prefetch0(&rxq->sw_ring[next_id]);
 170
 171         /*
 172          * It looks strange to prefetch depending on previous prefetch
 173          * data, but measurements show that it is really efficient and
 174          * increases packet rate.
 175          */
 176         next_mbuf = rxq->sw_ring[next_id].mbuf;
 177         if (likely(next_mbuf != NULL)) {
 178                 /* Prefetch the next mbuf structure */
 179                 rte_mbuf_prefetch_part1(next_mbuf);
 180
 181                 /* Prefetch pseudo header of the next packet */
 182                 /* data_off is not filled in yet */
 183                 /* Yes, data could be not ready yet, but we hope */
 184                 rte_prefetch0((uint8_t *)next_mbuf->buf_addr +
 185                               RTE_PKTMBUF_HEADROOM);
 186         }
 187 }
 188
 189 static struct rte_mbuf **
 190 sfc_ef10_rx_prepared(struct sfc_ef10_rxq *rxq, struct rte_mbuf **rx_pkts,
 191                      uint16_t nb_pkts)
 192 {
 193         uint16_t n_rx_pkts = RTE_MIN(nb_pkts, rxq->prepared);
 194
 195         if (n_rx_pkts != 0) {
 196                 unsigned int completed = rxq->completed;
 197
 198                 rxq->prepared -= n_rx_pkts;
 199                 rxq->completed = completed + n_rx_pkts;
 200
 201                 do {
 202                         *rx_pkts++ =
 203                                 rxq->sw_ring[completed++ & rxq->ptr_mask].mbuf;
 204                 } while (completed != rxq->completed);
 205         }
 206
 207         return rx_pkts;
 208 }
 209
 210 static uint16_t
 211 sfc_ef10_rx_pseudo_hdr_get_len(const uint8_t *pseudo_hdr)
 212 {
 213         return rte_le_to_cpu_16(*(const uint16_t *)&pseudo_hdr[8]);
 214 }
 215
 216 static uint32_t
 217 sfc_ef10_rx_pseudo_hdr_get_hash(const uint8_t *pseudo_hdr)
 218 {
 219         return rte_le_to_cpu_32(*(const uint32_t *)pseudo_hdr);
 220 }
 221
 222 static struct rte_mbuf **
 223 sfc_ef10_rx_process_event(struct sfc_ef10_rxq *rxq, efx_qword_t rx_ev,
 224                           struct rte_mbuf **rx_pkts,
 225                           struct rte_mbuf ** const rx_pkts_end)
 226 {
 227         const unsigned int ptr_mask = rxq->ptr_mask;
 228         unsigned int completed = rxq->completed;
 229         unsigned int ready;
 230         struct sfc_ef10_rx_sw_desc *rxd;
 231         struct rte_mbuf *m;
 232         struct rte_mbuf *m0;
 233         uint16_t n_rx_pkts;
 234         const uint8_t *pseudo_hdr;
 235         uint16_t pkt_len;
 236
 237         ready = (EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_DSC_PTR_LBITS) - completed) &
 238                 EFX_MASK32(ESF_DZ_RX_DSC_PTR_LBITS);
 239         SFC_ASSERT(ready > 0);
 240
 241         if (rx_ev.eq_u64[0] &
 242             rte_cpu_to_le_64((1ull << ESF_DZ_RX_ECC_ERR_LBN) |
 243                              (1ull << ESF_DZ_RX_ECRC_ERR_LBN))) {
 244                 SFC_ASSERT(rxq->prepared == 0);
 245                 rxq->completed += ready;
 246                 while (ready-- > 0) {
 247                         rxd = &rxq->sw_ring[completed++ & ptr_mask];
 248                         rte_mbuf_raw_free(rxd->mbuf);
 249                 }
 250                 return rx_pkts;
 251         }
 252
 253         n_rx_pkts = RTE_MIN(ready, rx_pkts_end - rx_pkts);
 254         rxq->prepared = ready - n_rx_pkts;
 255         rxq->completed += n_rx_pkts;
 256
 257         rxd = &rxq->sw_ring[completed++ & ptr_mask];
 258
 259         sfc_ef10_rx_prefetch_next(rxq, completed & ptr_mask);
 260
 261         m = rxd->mbuf;
 262
 263         *rx_pkts++ = m;
 264
 265         RTE_BUILD_BUG_ON(sizeof(m->rearm_data[0]) != sizeof(rxq->rearm_data));
 266         m->rearm_data[0] = rxq->rearm_data;
 267
 268         /* Classify packet based on Rx event */
 269         /* Mask RSS hash offload flag if RSS is not enabled */
 270         sfc_ef10_rx_ev_to_offloads(rx_ev, m,
 271                                    (rxq->flags & SFC_EF10_RXQ_RSS_HASH) ?
 272                                    ~0ull : ~PKT_RX_RSS_HASH);
 273
 274         /* data_off already moved past pseudo header */
 275         pseudo_hdr = (uint8_t *)m->buf_addr + RTE_PKTMBUF_HEADROOM;
 276
 277         /*
 278          * Always get RSS hash from pseudo header to avoid
 279          * condition/branching. If it is valid or not depends on
 280          * PKT_RX_RSS_HASH in m->ol_flags.
 281          */
 282         m->hash.rss = sfc_ef10_rx_pseudo_hdr_get_hash(pseudo_hdr);
 283
 284         if (ready == 1)
 285                 pkt_len = EFX_QWORD_FIELD(rx_ev, ESF_DZ_RX_BYTES) -
 286                         rxq->prefix_size;
 287         else
 288                 pkt_len = sfc_ef10_rx_pseudo_hdr_get_len(pseudo_hdr);
 289         SFC_ASSERT(pkt_len > 0);
 290         rte_pktmbuf_data_len(m) = pkt_len;
 291         rte_pktmbuf_pkt_len(m) = pkt_len;
 292
 293         SFC_ASSERT(m->next == NULL);
 294
 295         /* Remember mbuf to copy offload flags and packet type from */
 296         m0 = m;
 297         for (--ready; ready > 0; --ready) {
 298                 rxd = &rxq->sw_ring[completed++ & ptr_mask];
 299
 300                 sfc_ef10_rx_prefetch_next(rxq, completed & ptr_mask);
 301
 302                 m = rxd->mbuf;
 303
 304                 if (ready > rxq->prepared)
 305                         *rx_pkts++ = m;
 306
 307                 RTE_BUILD_BUG_ON(sizeof(m->rearm_data[0]) !=
 308                                  sizeof(rxq->rearm_data));
 309                 m->rearm_data[0] = rxq->rearm_data;
 310
 311                 /* Event-dependent information is the same */
 312                 m->ol_flags = m0->ol_flags;
 313                 m->packet_type = m0->packet_type;
 314
 315                 /* data_off already moved past pseudo header */
 316                 pseudo_hdr = (uint8_t *)m->buf_addr + RTE_PKTMBUF_HEADROOM;
 317
 318                 /*
 319                  * Always get RSS hash from pseudo header to avoid
 320                  * condition/branching. If it is valid or not depends on
 321                  * PKT_RX_RSS_HASH in m->ol_flags.
 322                  */
 323                 m->hash.rss = sfc_ef10_rx_pseudo_hdr_get_hash(pseudo_hdr);
 324
 325                 pkt_len = sfc_ef10_rx_pseudo_hdr_get_len(pseudo_hdr);
 326                 SFC_ASSERT(pkt_len > 0);
 327                 rte_pktmbuf_data_len(m) = pkt_len;
 328                 rte_pktmbuf_pkt_len(m) = pkt_len;
 329
 330                 SFC_ASSERT(m->next == NULL);
 331         }
 332
 333         return rx_pkts;
 334 }
 335
 336 static bool
 337 sfc_ef10_rx_get_event(struct sfc_ef10_rxq *rxq, efx_qword_t *rx_ev)
 338 {
 339         *rx_ev = rxq->evq_hw_ring[rxq->evq_read_ptr & rxq->ptr_mask];
 340
 341         if (!sfc_ef10_ev_present(*rx_ev))
 342                 return false;
 343
 344         if (unlikely(EFX_QWORD_FIELD(*rx_ev, FSF_AZ_EV_CODE) !=
 345                      FSE_AZ_EV_CODE_RX_EV)) {
 346                 /*
 347                  * Do not move read_ptr to keep the event for exception
 348                  * handling by the control path.
 349                  */
 350                 rxq->flags |= SFC_EF10_RXQ_EXCEPTION;
 351                 sfc_ef10_rx_err(&rxq->dp.dpq,
 352                                 "RxQ exception at EvQ read ptr %#x",
 353                                 rxq->evq_read_ptr);
 354                 return false;
 355         }
 356
 357         rxq->evq_read_ptr++;
 358         return true;
 359 }
 360
 361 static uint16_t
 362 sfc_ef10_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 363 {
 364         struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(rx_queue);
 365         struct rte_mbuf ** const rx_pkts_end = &rx_pkts[nb_pkts];
 366         unsigned int evq_old_read_ptr;
 367         efx_qword_t rx_ev;
 368
 369         rx_pkts = sfc_ef10_rx_prepared(rxq, rx_pkts, nb_pkts);
 370
 371         if (unlikely(rxq->flags &
 372                      (SFC_EF10_RXQ_NOT_RUNNING | SFC_EF10_RXQ_EXCEPTION)))
 373                 goto done;
 374
 375         evq_old_read_ptr = rxq->evq_read_ptr;
 376         while (rx_pkts != rx_pkts_end && sfc_ef10_rx_get_event(rxq, &rx_ev)) {
 377                 /*
 378                  * DROP_EVENT is an internal to the NIC, software should
 379                  * never see it and, therefore, may ignore it.
 380                  */
 381
 382                 rx_pkts = sfc_ef10_rx_process_event(rxq, rx_ev,
 383                                                     rx_pkts, rx_pkts_end);
 384         }
 385
 386         sfc_ef10_ev_qclear(rxq->evq_hw_ring, rxq->ptr_mask, evq_old_read_ptr,
 387                            rxq->evq_read_ptr);
 388
 389         /* It is not a problem if we refill in the case of exception */
 390         sfc_ef10_rx_qrefill(rxq);
 391
 392 done:
 393         return nb_pkts - (rx_pkts_end - rx_pkts);
 394 }
 395
 396 const uint32_t *
 397 sfc_ef10_supported_ptypes_get(uint32_t tunnel_encaps)
 398 {
 399         static const uint32_t ef10_native_ptypes[] = {
 400                 RTE_PTYPE_L2_ETHER,
 401                 RTE_PTYPE_L2_ETHER_ARP,
 402                 RTE_PTYPE_L2_ETHER_VLAN,
 403                 RTE_PTYPE_L2_ETHER_QINQ,
 404                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 405                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 406                 RTE_PTYPE_L4_FRAG,
 407                 RTE_PTYPE_L4_TCP,
 408                 RTE_PTYPE_L4_UDP,
 409                 RTE_PTYPE_UNKNOWN
 410         };
 411         static const uint32_t ef10_overlay_ptypes[] = {
 412                 RTE_PTYPE_L2_ETHER,
 413                 RTE_PTYPE_L2_ETHER_ARP,
 414                 RTE_PTYPE_L2_ETHER_VLAN,
 415                 RTE_PTYPE_L2_ETHER_QINQ,
 416                 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
 417                 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
 418                 RTE_PTYPE_L4_FRAG,
 419                 RTE_PTYPE_L4_TCP,
 420                 RTE_PTYPE_L4_UDP,
 421                 RTE_PTYPE_TUNNEL_VXLAN,
 422                 RTE_PTYPE_TUNNEL_NVGRE,
 423                 RTE_PTYPE_INNER_L2_ETHER,
 424                 RTE_PTYPE_INNER_L2_ETHER_VLAN,
 425                 RTE_PTYPE_INNER_L2_ETHER_QINQ,
 426                 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
 427                 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
 428                 RTE_PTYPE_INNER_L4_FRAG,
 429                 RTE_PTYPE_INNER_L4_TCP,
 430                 RTE_PTYPE_INNER_L4_UDP,
 431                 RTE_PTYPE_UNKNOWN
 432         };
 433
 434         /*
 435          * The function returns static set of supported packet types,
 436          * so we can't build it dynamically based on supported tunnel
 437          * encapsulations and should limit to known sets.
 438          */
 439         switch (tunnel_encaps) {
 440         case (1u << EFX_TUNNEL_PROTOCOL_VXLAN |
 441               1u << EFX_TUNNEL_PROTOCOL_GENEVE |
 442               1u << EFX_TUNNEL_PROTOCOL_NVGRE):
 443                 return ef10_overlay_ptypes;
 444         default:
 445                 SFC_GENERIC_LOG(ERR,
 446                         "Unexpected set of supported tunnel encapsulations: %#x",
 447                         tunnel_encaps);
 448                 /* FALLTHROUGH */
 449         case 0:
 450                 return ef10_native_ptypes;
 451         }
 452 }
 453
 454 static sfc_dp_rx_qdesc_npending_t sfc_ef10_rx_qdesc_npending;
 455 static unsigned int
 456 sfc_ef10_rx_qdesc_npending(__rte_unused struct sfc_dp_rxq *dp_rxq)
 457 {
 458         /*
 459          * Correct implementation requires EvQ polling and events
 460          * processing (keeping all ready mbufs in prepared).
 461          */
 462         return -ENOTSUP;
 463 }
 464
 465 static sfc_dp_rx_qdesc_status_t sfc_ef10_rx_qdesc_status;
 466 static int
 467 sfc_ef10_rx_qdesc_status(__rte_unused struct sfc_dp_rxq *dp_rxq,
 468                          __rte_unused uint16_t offset)
 469 {
 470         return -ENOTSUP;
 471 }
 472
 473
 474 static sfc_dp_rx_get_dev_info_t sfc_ef10_rx_get_dev_info;
 475 static void
 476 sfc_ef10_rx_get_dev_info(struct rte_eth_dev_info *dev_info)
 477 {
 478         /*
 479          * Number of descriptors just defines maximum number of pushed
 480          * descriptors (fill level).
 481          */
 482         dev_info->rx_desc_lim.nb_min = SFC_RX_REFILL_BULK;
 483         dev_info->rx_desc_lim.nb_align = SFC_RX_REFILL_BULK;
 484 }
 485
 486
 487 static sfc_dp_rx_qsize_up_rings_t sfc_ef10_rx_qsize_up_rings;
 488 static int
 489 sfc_ef10_rx_qsize_up_rings(uint16_t nb_rx_desc,
 490                            __rte_unused struct rte_mempool *mb_pool,
 491                            unsigned int *rxq_entries,
 492                            unsigned int *evq_entries,
 493                            unsigned int *rxq_max_fill_level)
 494 {
 495         /*
 496          * rte_ethdev API guarantees that the number meets min, max and
 497          * alignment requirements.
 498          */
 499         if (nb_rx_desc <= EFX_RXQ_MINNDESCS)
 500                 *rxq_entries = EFX_RXQ_MINNDESCS;
 501         else
 502                 *rxq_entries = rte_align32pow2(nb_rx_desc);
 503
 504         *evq_entries = *rxq_entries;
 505
 506         *rxq_max_fill_level = RTE_MIN(nb_rx_desc,
 507                                       SFC_EF10_RXQ_LIMIT(*evq_entries));
 508         return 0;
 509 }
 510
 511
 512 static uint64_t
 513 sfc_ef10_mk_mbuf_rearm_data(uint16_t port_id, uint16_t prefix_size)
 514 {
 515         struct rte_mbuf m;
 516
 517         memset(&m, 0, sizeof(m));
 518
 519         rte_mbuf_refcnt_set(&m, 1);
 520         m.data_off = RTE_PKTMBUF_HEADROOM + prefix_size;
 521         m.nb_segs = 1;
 522         m.port = port_id;
 523
 524         /* rearm_data covers structure members filled in above */
 525         rte_compiler_barrier();
 526         RTE_BUILD_BUG_ON(sizeof(m.rearm_data[0]) != sizeof(uint64_t));
 527         return m.rearm_data[0];
 528 }
 529
 530 static sfc_dp_rx_qcreate_t sfc_ef10_rx_qcreate;
 531 static int
 532 sfc_ef10_rx_qcreate(uint16_t port_id, uint16_t queue_id,
 533                     const struct rte_pci_addr *pci_addr, int socket_id,
 534                     const struct sfc_dp_rx_qcreate_info *info,
 535                     struct sfc_dp_rxq **dp_rxqp)
 536 {
 537         struct sfc_ef10_rxq *rxq;
 538         int rc;
 539
 540         rc = EINVAL;
 541         if (info->rxq_entries != info->evq_entries)
 542                 goto fail_rxq_args;
 543
 544         rc = ENOMEM;
 545         rxq = rte_zmalloc_socket("sfc-ef10-rxq", sizeof(*rxq),
 546                                  RTE_CACHE_LINE_SIZE, socket_id);
 547         if (rxq == NULL)
 548                 goto fail_rxq_alloc;
 549
 550         sfc_dp_queue_init(&rxq->dp.dpq, port_id, queue_id, pci_addr);
 551
 552         rc = ENOMEM;
 553         rxq->sw_ring = rte_calloc_socket("sfc-ef10-rxq-sw_ring",
 554                                          info->rxq_entries,
 555                                          sizeof(*rxq->sw_ring),
 556                                          RTE_CACHE_LINE_SIZE, socket_id);
 557         if (rxq->sw_ring == NULL)
 558                 goto fail_desc_alloc;
 559
 560         rxq->flags |= SFC_EF10_RXQ_NOT_RUNNING;
 561         if (info->flags & SFC_RXQ_FLAG_RSS_HASH)
 562                 rxq->flags |= SFC_EF10_RXQ_RSS_HASH;
 563         rxq->ptr_mask = info->rxq_entries - 1;
 564         rxq->evq_hw_ring = info->evq_hw_ring;
 565         rxq->max_fill_level = info->max_fill_level;
 566         rxq->refill_threshold = info->refill_threshold;
 567         rxq->rearm_data =
 568                 sfc_ef10_mk_mbuf_rearm_data(port_id, info->prefix_size);
 569         rxq->prefix_size = info->prefix_size;
 570         rxq->buf_size = info->buf_size;
 571         rxq->refill_mb_pool = info->refill_mb_pool;
 572         rxq->rxq_hw_ring = info->rxq_hw_ring;
 573         rxq->doorbell = (volatile uint8_t *)info->mem_bar +
 574                         ER_DZ_RX_DESC_UPD_REG_OFST +
 575                         (info->hw_index << info->vi_window_shift);
 576
 577         *dp_rxqp = &rxq->dp;
 578         return 0;
 579
 580 fail_desc_alloc:
 581         rte_free(rxq);
 582
 583 fail_rxq_alloc:
 584 fail_rxq_args:
 585         return rc;
 586 }
 587
 588 static sfc_dp_rx_qdestroy_t sfc_ef10_rx_qdestroy;
 589 static void
 590 sfc_ef10_rx_qdestroy(struct sfc_dp_rxq *dp_rxq)
 591 {
 592         struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
 593
 594         rte_free(rxq->sw_ring);
 595         rte_free(rxq);
 596 }
 597
 598 static sfc_dp_rx_qstart_t sfc_ef10_rx_qstart;
 599 static int
 600 sfc_ef10_rx_qstart(struct sfc_dp_rxq *dp_rxq, unsigned int evq_read_ptr)
 601 {
 602         struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
 603
 604         SFC_ASSERT(rxq->prepared == 0);
 605         SFC_ASSERT(rxq->completed == 0);
 606         SFC_ASSERT(rxq->added == 0);
 607
 608         sfc_ef10_rx_qrefill(rxq);
 609
 610         rxq->evq_read_ptr = evq_read_ptr;
 611
 612         rxq->flags |= SFC_EF10_RXQ_STARTED;
 613         rxq->flags &= ~(SFC_EF10_RXQ_NOT_RUNNING | SFC_EF10_RXQ_EXCEPTION);
 614
 615         return 0;
 616 }
 617
 618 static sfc_dp_rx_qstop_t sfc_ef10_rx_qstop;
 619 static void
 620 sfc_ef10_rx_qstop(struct sfc_dp_rxq *dp_rxq, unsigned int *evq_read_ptr)
 621 {
 622         struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
 623
 624         rxq->flags |= SFC_EF10_RXQ_NOT_RUNNING;
 625
 626         *evq_read_ptr = rxq->evq_read_ptr;
 627 }
 628
 629 static sfc_dp_rx_qrx_ev_t sfc_ef10_rx_qrx_ev;
 630 static bool
 631 sfc_ef10_rx_qrx_ev(struct sfc_dp_rxq *dp_rxq, __rte_unused unsigned int id)
 632 {
 633         __rte_unused struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
 634
 635         SFC_ASSERT(rxq->flags & SFC_EF10_RXQ_NOT_RUNNING);
 636
 637         /*
 638          * It is safe to ignore Rx event since we free all mbufs on
 639          * queue purge anyway.
 640          */
 641
 642         return false;
 643 }
 644
 645 static sfc_dp_rx_qpurge_t sfc_ef10_rx_qpurge;
 646 static void
 647 sfc_ef10_rx_qpurge(struct sfc_dp_rxq *dp_rxq)
 648 {
 649         struct sfc_ef10_rxq *rxq = sfc_ef10_rxq_by_dp_rxq(dp_rxq);
 650         unsigned int i;
 651         struct sfc_ef10_rx_sw_desc *rxd;
 652
 653         rxq->prepared = 0;
 654
 655         for (i = rxq->completed; i != rxq->added; ++i) {
 656                 rxd = &rxq->sw_ring[i & rxq->ptr_mask];
 657                 rte_mbuf_raw_free(rxd->mbuf);
 658                 rxd->mbuf = NULL;
 659         }
 660
 661         rxq->completed = rxq->added = 0;
 662
 663         rxq->flags &= ~SFC_EF10_RXQ_STARTED;
 664 }
 665
 666 struct sfc_dp_rx sfc_ef10_rx = {
 667         .dp = {
 668                 .name           = SFC_KVARG_DATAPATH_EF10,
 669                 .type           = SFC_DP_RX,
 670                 .hw_fw_caps     = SFC_DP_HW_FW_CAP_EF10,
 671         },
 672         .features               = SFC_DP_RX_FEAT_MULTI_PROCESS |
 673                                   SFC_DP_RX_FEAT_TUNNELS |
 674                                   SFC_DP_RX_FEAT_CHECKSUM,
 675         .get_dev_info           = sfc_ef10_rx_get_dev_info,
 676         .qsize_up_rings         = sfc_ef10_rx_qsize_up_rings,
 677         .qcreate                = sfc_ef10_rx_qcreate,
 678         .qdestroy               = sfc_ef10_rx_qdestroy,
 679         .qstart                 = sfc_ef10_rx_qstart,
 680         .qstop                  = sfc_ef10_rx_qstop,
 681         .qrx_ev                 = sfc_ef10_rx_qrx_ev,
 682         .qpurge                 = sfc_ef10_rx_qpurge,
 683         .supported_ptypes_get   = sfc_ef10_supported_ptypes_get,
 684         .qdesc_npending         = sfc_ef10_rx_qdesc_npending,
 685         .qdesc_status           = sfc_ef10_rx_qdesc_status,
 686         .pkt_burst              = sfc_ef10_recv_pkts,
 687 };