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