drivers/net/bnxt/bnxt_rxr.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2014-2018 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include <inttypes.h>
   7 #include <stdbool.h>
   8
   9 #include <rte_bitmap.h>
  10 #include <rte_byteorder.h>
  11 #include <rte_malloc.h>
  12 #include <rte_memory.h>
  13
  14 #include "bnxt.h"
  15 #include "bnxt_cpr.h"
  16 #include "bnxt_ring.h"
  17 #include "bnxt_rxr.h"
  18 #include "bnxt_rxq.h"
  19 #include "hsi_struct_def_dpdk.h"
  20
  21 /*
  22  * RX Ring handling
  23  */
  24
  25 static inline struct rte_mbuf *__bnxt_alloc_rx_data(struct rte_mempool *mb)
  26 {
  27         struct rte_mbuf *data;
  28
  29         data = rte_mbuf_raw_alloc(mb);
  30
  31         return data;
  32 }
  33
  34 static inline int bnxt_alloc_rx_data(struct bnxt_rx_queue *rxq,
  35                                      struct bnxt_rx_ring_info *rxr,
  36                                      uint16_t prod)
  37 {
  38         struct rx_prod_pkt_bd *rxbd = &rxr->rx_desc_ring[prod];
  39         struct bnxt_sw_rx_bd *rx_buf = &rxr->rx_buf_ring[prod];
  40         struct rte_mbuf *mbuf;
  41
  42         mbuf = __bnxt_alloc_rx_data(rxq->mb_pool);
  43         if (!mbuf) {
  44                 rte_atomic64_inc(&rxq->rx_mbuf_alloc_fail);
  45                 return -ENOMEM;
  46         }
  47
  48         rx_buf->mbuf = mbuf;
  49         mbuf->data_off = RTE_PKTMBUF_HEADROOM;
  50
  51         rxbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));
  52
  53         return 0;
  54 }
  55
  56 static inline int bnxt_alloc_ag_data(struct bnxt_rx_queue *rxq,
  57                                      struct bnxt_rx_ring_info *rxr,
  58                                      uint16_t prod)
  59 {
  60         struct rx_prod_pkt_bd *rxbd = &rxr->ag_desc_ring[prod];
  61         struct bnxt_sw_rx_bd *rx_buf = &rxr->ag_buf_ring[prod];
  62         struct rte_mbuf *mbuf;
  63
  64         mbuf = __bnxt_alloc_rx_data(rxq->mb_pool);
  65         if (!mbuf) {
  66                 rte_atomic64_inc(&rxq->rx_mbuf_alloc_fail);
  67                 return -ENOMEM;
  68         }
  69
  70         if (rxbd == NULL)
  71                 PMD_DRV_LOG(ERR, "Jumbo Frame. rxbd is NULL\n");
  72         if (rx_buf == NULL)
  73                 PMD_DRV_LOG(ERR, "Jumbo Frame. rx_buf is NULL\n");
  74
  75
  76         rx_buf->mbuf = mbuf;
  77         mbuf->data_off = RTE_PKTMBUF_HEADROOM;
  78
  79         rxbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));
  80
  81         return 0;
  82 }
  83
  84 static inline void bnxt_reuse_rx_mbuf(struct bnxt_rx_ring_info *rxr,
  85                                struct rte_mbuf *mbuf)
  86 {
  87         uint16_t prod = RING_NEXT(rxr->rx_ring_struct, rxr->rx_prod);
  88         struct bnxt_sw_rx_bd *prod_rx_buf;
  89         struct rx_prod_pkt_bd *prod_bd;
  90
  91         prod_rx_buf = &rxr->rx_buf_ring[prod];
  92
  93         RTE_ASSERT(prod_rx_buf->mbuf == NULL);
  94         RTE_ASSERT(mbuf != NULL);
  95
  96         prod_rx_buf->mbuf = mbuf;
  97
  98         prod_bd = &rxr->rx_desc_ring[prod];
  99
 100         prod_bd->address = rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));
 101
 102         rxr->rx_prod = prod;
 103 }
 104
 105 #ifdef BNXT_DEBUG
 106 static void bnxt_reuse_ag_mbuf(struct bnxt_rx_ring_info *rxr, uint16_t cons,
 107                                struct rte_mbuf *mbuf)
 108 {
 109         uint16_t prod = rxr->ag_prod;
 110         struct bnxt_sw_rx_bd *prod_rx_buf;
 111         struct rx_prod_pkt_bd *prod_bd, *cons_bd;
 112
 113         prod_rx_buf = &rxr->ag_buf_ring[prod];
 114
 115         prod_rx_buf->mbuf = mbuf;
 116
 117         prod_bd = &rxr->ag_desc_ring[prod];
 118         cons_bd = &rxr->ag_desc_ring[cons];
 119
 120         prod_bd->address = cons_bd->addr;
 121 }
 122 #endif
 123
 124 static inline
 125 struct rte_mbuf *bnxt_consume_rx_buf(struct bnxt_rx_ring_info *rxr,
 126                                      uint16_t cons)
 127 {
 128         struct bnxt_sw_rx_bd *cons_rx_buf;
 129         struct rte_mbuf *mbuf;
 130
 131         cons_rx_buf = &rxr->rx_buf_ring[cons];
 132         RTE_ASSERT(cons_rx_buf->mbuf != NULL);
 133         mbuf = cons_rx_buf->mbuf;
 134         cons_rx_buf->mbuf = NULL;
 135         return mbuf;
 136 }
 137
 138 static void bnxt_tpa_start(struct bnxt_rx_queue *rxq,
 139                            struct rx_tpa_start_cmpl *tpa_start,
 140                            struct rx_tpa_start_cmpl_hi *tpa_start1)
 141 {
 142         struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 143         uint8_t agg_id = rte_le_to_cpu_32(tpa_start->agg_id &
 144                 RX_TPA_START_CMPL_AGG_ID_MASK) >> RX_TPA_START_CMPL_AGG_ID_SFT;
 145         uint16_t data_cons;
 146         struct bnxt_tpa_info *tpa_info;
 147         struct rte_mbuf *mbuf;
 148
 149         data_cons = tpa_start->opaque;
 150         tpa_info = &rxr->tpa_info[agg_id];
 151
 152         mbuf = bnxt_consume_rx_buf(rxr, data_cons);
 153
 154         bnxt_reuse_rx_mbuf(rxr, tpa_info->mbuf);
 155
 156         tpa_info->mbuf = mbuf;
 157         tpa_info->len = rte_le_to_cpu_32(tpa_start->len);
 158
 159         mbuf->nb_segs = 1;
 160         mbuf->next = NULL;
 161         mbuf->pkt_len = rte_le_to_cpu_32(tpa_start->len);
 162         mbuf->data_len = mbuf->pkt_len;
 163         mbuf->port = rxq->port_id;
 164         mbuf->ol_flags = PKT_RX_LRO;
 165         if (likely(tpa_start->flags_type &
 166                    rte_cpu_to_le_32(RX_TPA_START_CMPL_FLAGS_RSS_VALID))) {
 167                 mbuf->hash.rss = rte_le_to_cpu_32(tpa_start->rss_hash);
 168                 mbuf->ol_flags |= PKT_RX_RSS_HASH;
 169         } else {
 170                 mbuf->hash.fdir.id = rte_le_to_cpu_16(tpa_start1->cfa_code);
 171                 mbuf->ol_flags |= PKT_RX_FDIR | PKT_RX_FDIR_ID;
 172         }
 173         if (tpa_start1->flags2 &
 174             rte_cpu_to_le_32(RX_TPA_START_CMPL_FLAGS2_META_FORMAT_VLAN)) {
 175                 mbuf->vlan_tci = rte_le_to_cpu_32(tpa_start1->metadata);
 176                 mbuf->ol_flags |= PKT_RX_VLAN;
 177         }
 178         if (likely(tpa_start1->flags2 &
 179                    rte_cpu_to_le_32(RX_TPA_START_CMPL_FLAGS2_L4_CS_CALC)))
 180                 mbuf->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
 181
 182         /* recycle next mbuf */
 183         data_cons = RING_NEXT(rxr->rx_ring_struct, data_cons);
 184         bnxt_reuse_rx_mbuf(rxr, bnxt_consume_rx_buf(rxr, data_cons));
 185 }
 186
 187 static int bnxt_agg_bufs_valid(struct bnxt_cp_ring_info *cpr,
 188                 uint8_t agg_bufs, uint32_t raw_cp_cons)
 189 {
 190         uint16_t last_cp_cons;
 191         struct rx_pkt_cmpl *agg_cmpl;
 192
 193         raw_cp_cons = ADV_RAW_CMP(raw_cp_cons, agg_bufs);
 194         last_cp_cons = RING_CMP(cpr->cp_ring_struct, raw_cp_cons);
 195         agg_cmpl = (struct rx_pkt_cmpl *)&cpr->cp_desc_ring[last_cp_cons];
 196         cpr->valid = FLIP_VALID(raw_cp_cons,
 197                                 cpr->cp_ring_struct->ring_mask,
 198                                 cpr->valid);
 199         return CMP_VALID(agg_cmpl, raw_cp_cons, cpr->cp_ring_struct);
 200 }
 201
 202 /* TPA consume agg buffer out of order, allocate connected data only */
 203 static int bnxt_prod_ag_mbuf(struct bnxt_rx_queue *rxq)
 204 {
 205         struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 206         uint16_t next = RING_NEXT(rxr->ag_ring_struct, rxr->ag_prod);
 207
 208         /* TODO batch allocation for better performance */
 209         while (rte_bitmap_get(rxr->ag_bitmap, next)) {
 210                 if (unlikely(bnxt_alloc_ag_data(rxq, rxr, next))) {
 211                         PMD_DRV_LOG(ERR,
 212                                 "agg mbuf alloc failed: prod=0x%x\n", next);
 213                         break;
 214                 }
 215                 rte_bitmap_clear(rxr->ag_bitmap, next);
 216                 rxr->ag_prod = next;
 217                 next = RING_NEXT(rxr->ag_ring_struct, next);
 218         }
 219
 220         return 0;
 221 }
 222
 223 static int bnxt_rx_pages(struct bnxt_rx_queue *rxq,
 224                          struct rte_mbuf *mbuf, uint32_t *tmp_raw_cons,
 225                          uint8_t agg_buf)
 226 {
 227         struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 228         struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 229         int i;
 230         uint16_t cp_cons, ag_cons;
 231         struct rx_pkt_cmpl *rxcmp;
 232         struct rte_mbuf *last = mbuf;
 233
 234         for (i = 0; i < agg_buf; i++) {
 235                 struct bnxt_sw_rx_bd *ag_buf;
 236                 struct rte_mbuf *ag_mbuf;
 237                 *tmp_raw_cons = NEXT_RAW_CMP(*tmp_raw_cons);
 238                 cp_cons = RING_CMP(cpr->cp_ring_struct, *tmp_raw_cons);
 239                 rxcmp = (struct rx_pkt_cmpl *)
 240                                         &cpr->cp_desc_ring[cp_cons];
 241
 242 #ifdef BNXT_DEBUG
 243                 bnxt_dump_cmpl(cp_cons, rxcmp);
 244 #endif
 245
 246                 ag_cons = rxcmp->opaque;
 247                 RTE_ASSERT(ag_cons <= rxr->ag_ring_struct->ring_mask);
 248                 ag_buf = &rxr->ag_buf_ring[ag_cons];
 249                 ag_mbuf = ag_buf->mbuf;
 250                 RTE_ASSERT(ag_mbuf != NULL);
 251
 252                 ag_mbuf->data_len = rte_le_to_cpu_16(rxcmp->len);
 253
 254                 mbuf->nb_segs++;
 255                 mbuf->pkt_len += ag_mbuf->data_len;
 256
 257                 last->next = ag_mbuf;
 258                 last = ag_mbuf;
 259
 260                 ag_buf->mbuf = NULL;
 261
 262                 /*
 263                  * As aggregation buffer consumed out of order in TPA module,
 264                  * use bitmap to track freed slots to be allocated and notified
 265                  * to NIC
 266                  */
 267                 rte_bitmap_set(rxr->ag_bitmap, ag_cons);
 268         }
 269         bnxt_prod_ag_mbuf(rxq);
 270         return 0;
 271 }
 272
 273 static inline struct rte_mbuf *bnxt_tpa_end(
 274                 struct bnxt_rx_queue *rxq,
 275                 uint32_t *raw_cp_cons,
 276                 struct rx_tpa_end_cmpl *tpa_end,
 277                 struct rx_tpa_end_cmpl_hi *tpa_end1 __rte_unused)
 278 {
 279         struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 280         struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 281         uint8_t agg_id = (tpa_end->agg_id & RX_TPA_END_CMPL_AGG_ID_MASK)
 282                         >> RX_TPA_END_CMPL_AGG_ID_SFT;
 283         struct rte_mbuf *mbuf;
 284         uint8_t agg_bufs;
 285         struct bnxt_tpa_info *tpa_info;
 286
 287         tpa_info = &rxr->tpa_info[agg_id];
 288         mbuf = tpa_info->mbuf;
 289         RTE_ASSERT(mbuf != NULL);
 290
 291         rte_prefetch0(mbuf);
 292         agg_bufs = (rte_le_to_cpu_32(tpa_end->agg_bufs_v1) &
 293                 RX_TPA_END_CMPL_AGG_BUFS_MASK) >> RX_TPA_END_CMPL_AGG_BUFS_SFT;
 294         if (agg_bufs) {
 295                 if (!bnxt_agg_bufs_valid(cpr, agg_bufs, *raw_cp_cons))
 296                         return NULL;
 297                 bnxt_rx_pages(rxq, mbuf, raw_cp_cons, agg_bufs);
 298         }
 299         mbuf->l4_len = tpa_end->payload_offset;
 300
 301         struct rte_mbuf *new_data = __bnxt_alloc_rx_data(rxq->mb_pool);
 302         RTE_ASSERT(new_data != NULL);
 303         if (!new_data) {
 304                 rte_atomic64_inc(&rxq->rx_mbuf_alloc_fail);
 305                 return NULL;
 306         }
 307         tpa_info->mbuf = new_data;
 308
 309         return mbuf;
 310 }
 311
 312 static uint32_t
 313 bnxt_parse_pkt_type(struct rx_pkt_cmpl *rxcmp, struct rx_pkt_cmpl_hi *rxcmp1)
 314 {
 315         uint32_t l3, pkt_type = 0;
 316         uint32_t t_ipcs = 0, ip6 = 0, vlan = 0;
 317         uint32_t flags_type;
 318
 319         vlan = !!(rxcmp1->flags2 &
 320                 rte_cpu_to_le_32(RX_PKT_CMPL_FLAGS2_META_FORMAT_VLAN));
 321         pkt_type |= vlan ? RTE_PTYPE_L2_ETHER_VLAN : RTE_PTYPE_L2_ETHER;
 322
 323         t_ipcs = !!(rxcmp1->flags2 &
 324                 rte_cpu_to_le_32(RX_PKT_CMPL_FLAGS2_T_IP_CS_CALC));
 325         ip6 = !!(rxcmp1->flags2 &
 326                  rte_cpu_to_le_32(RX_PKT_CMPL_FLAGS2_IP_TYPE));
 327
 328         flags_type = rxcmp->flags_type &
 329                 rte_cpu_to_le_32(RX_PKT_CMPL_FLAGS_ITYPE_MASK);
 330
 331         if (!t_ipcs && !ip6)
 332                 l3 = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
 333         else if (!t_ipcs && ip6)
 334                 l3 = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;
 335         else if (t_ipcs && !ip6)
 336                 l3 = RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN;
 337         else
 338                 l3 = RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN;
 339
 340         switch (flags_type) {
 341         case RTE_LE32(RX_PKT_CMPL_FLAGS_ITYPE_ICMP):
 342                 if (!t_ipcs)
 343                         pkt_type |= l3 | RTE_PTYPE_L4_ICMP;
 344                 else
 345                         pkt_type |= l3 | RTE_PTYPE_INNER_L4_ICMP;
 346                 break;
 347
 348         case RTE_LE32(RX_PKT_CMPL_FLAGS_ITYPE_TCP):
 349                 if (!t_ipcs)
 350                         pkt_type |= l3 | RTE_PTYPE_L4_TCP;
 351                 else
 352                         pkt_type |= l3 | RTE_PTYPE_INNER_L4_TCP;
 353                 break;
 354
 355         case RTE_LE32(RX_PKT_CMPL_FLAGS_ITYPE_UDP):
 356                 if (!t_ipcs)
 357                         pkt_type |= l3 | RTE_PTYPE_L4_UDP;
 358                 else
 359                         pkt_type |= l3 | RTE_PTYPE_INNER_L4_UDP;
 360                 break;
 361
 362         case RTE_LE32(RX_PKT_CMPL_FLAGS_ITYPE_IP):
 363                 pkt_type |= l3;
 364                 break;
 365         }
 366
 367         return pkt_type;
 368 }
 369
 370 static int bnxt_rx_pkt(struct rte_mbuf **rx_pkt,
 371                             struct bnxt_rx_queue *rxq, uint32_t *raw_cons)
 372 {
 373         struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 374         struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 375         struct rx_pkt_cmpl *rxcmp;
 376         struct rx_pkt_cmpl_hi *rxcmp1;
 377         uint32_t tmp_raw_cons = *raw_cons;
 378         uint16_t cons, prod, cp_cons =
 379             RING_CMP(cpr->cp_ring_struct, tmp_raw_cons);
 380 #ifdef BNXT_DEBUG
 381         uint16_t ag_cons;
 382 #endif
 383         struct rte_mbuf *mbuf;
 384         int rc = 0;
 385         uint8_t agg_buf = 0;
 386         uint16_t cmp_type;
 387
 388         rxcmp = (struct rx_pkt_cmpl *)
 389             &cpr->cp_desc_ring[cp_cons];
 390
 391         tmp_raw_cons = NEXT_RAW_CMP(tmp_raw_cons);
 392         cp_cons = RING_CMP(cpr->cp_ring_struct, tmp_raw_cons);
 393         rxcmp1 = (struct rx_pkt_cmpl_hi *)&cpr->cp_desc_ring[cp_cons];
 394
 395         if (!CMP_VALID(rxcmp1, tmp_raw_cons, cpr->cp_ring_struct))
 396                 return -EBUSY;
 397
 398         cpr->valid = FLIP_VALID(cp_cons,
 399                                 cpr->cp_ring_struct->ring_mask,
 400                                 cpr->valid);
 401
 402         cmp_type = CMP_TYPE(rxcmp);
 403         if (cmp_type == RX_TPA_START_CMPL_TYPE_RX_TPA_START) {
 404                 bnxt_tpa_start(rxq, (struct rx_tpa_start_cmpl *)rxcmp,
 405                                (struct rx_tpa_start_cmpl_hi *)rxcmp1);
 406                 rc = -EINVAL; /* Continue w/o new mbuf */
 407                 goto next_rx;
 408         } else if (cmp_type == RX_TPA_END_CMPL_TYPE_RX_TPA_END) {
 409                 mbuf = bnxt_tpa_end(rxq, &tmp_raw_cons,
 410                                    (struct rx_tpa_end_cmpl *)rxcmp,
 411                                    (struct rx_tpa_end_cmpl_hi *)rxcmp1);
 412                 if (unlikely(!mbuf))
 413                         return -EBUSY;
 414                 *rx_pkt = mbuf;
 415                 goto next_rx;
 416         } else if (cmp_type != 0x11) {
 417                 rc = -EINVAL;
 418                 goto next_rx;
 419         }
 420
 421         agg_buf = (rxcmp->agg_bufs_v1 & RX_PKT_CMPL_AGG_BUFS_MASK)
 422                         >> RX_PKT_CMPL_AGG_BUFS_SFT;
 423         if (agg_buf && !bnxt_agg_bufs_valid(cpr, agg_buf, tmp_raw_cons))
 424                 return -EBUSY;
 425
 426         prod = rxr->rx_prod;
 427
 428         cons = rxcmp->opaque;
 429         mbuf = bnxt_consume_rx_buf(rxr, cons);
 430         if (mbuf == NULL)
 431                 return -EBUSY;
 432
 433         rte_prefetch0(mbuf);
 434
 435         mbuf->data_off = RTE_PKTMBUF_HEADROOM;
 436         mbuf->nb_segs = 1;
 437         mbuf->next = NULL;
 438         mbuf->pkt_len = rxcmp->len;
 439         mbuf->data_len = mbuf->pkt_len;
 440         mbuf->port = rxq->port_id;
 441         mbuf->ol_flags = 0;
 442         if (rxcmp->flags_type & RX_PKT_CMPL_FLAGS_RSS_VALID) {
 443                 mbuf->hash.rss = rxcmp->rss_hash;
 444                 mbuf->ol_flags |= PKT_RX_RSS_HASH;
 445         } else {
 446                 mbuf->hash.fdir.id = rxcmp1->cfa_code;
 447                 mbuf->ol_flags |= PKT_RX_FDIR | PKT_RX_FDIR_ID;
 448         }
 449
 450         if ((rxcmp->flags_type & rte_cpu_to_le_16(RX_PKT_CMPL_FLAGS_MASK)) ==
 451              RX_PKT_CMPL_FLAGS_ITYPE_PTP_W_TIMESTAMP)
 452                 mbuf->ol_flags |= PKT_RX_IEEE1588_PTP | PKT_RX_IEEE1588_TMST;
 453
 454         if (agg_buf)
 455                 bnxt_rx_pages(rxq, mbuf, &tmp_raw_cons, agg_buf);
 456
 457         if (rxcmp1->flags2 & RX_PKT_CMPL_FLAGS2_META_FORMAT_VLAN) {
 458                 mbuf->vlan_tci = rxcmp1->metadata &
 459                         (RX_PKT_CMPL_METADATA_VID_MASK |
 460                         RX_PKT_CMPL_METADATA_DE |
 461                         RX_PKT_CMPL_METADATA_PRI_MASK);
 462                 mbuf->ol_flags |= PKT_RX_VLAN;
 463         }
 464
 465         if (likely(RX_CMP_IP_CS_OK(rxcmp1)))
 466                 mbuf->ol_flags |= PKT_RX_IP_CKSUM_GOOD;
 467         else if (likely(RX_CMP_IP_CS_UNKNOWN(rxcmp1)))
 468                 mbuf->ol_flags |= PKT_RX_IP_CKSUM_UNKNOWN;
 469         else
 470                 mbuf->ol_flags |= PKT_RX_IP_CKSUM_BAD;
 471
 472         if (likely(RX_CMP_L4_CS_OK(rxcmp1)))
 473                 mbuf->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
 474         else if (likely(RX_CMP_L4_CS_UNKNOWN(rxcmp1)))
 475                 mbuf->ol_flags |= PKT_RX_L4_CKSUM_UNKNOWN;
 476         else
 477                 mbuf->ol_flags |= PKT_RX_L4_CKSUM_BAD;
 478
 479         mbuf->packet_type = bnxt_parse_pkt_type(rxcmp, rxcmp1);
 480
 481 #ifdef BNXT_DEBUG
 482         if (rxcmp1->errors_v2 & RX_CMP_L2_ERRORS) {
 483                 /* Re-install the mbuf back to the rx ring */
 484                 bnxt_reuse_rx_mbuf(rxr, cons, mbuf);
 485                 if (agg_buf)
 486                         bnxt_reuse_ag_mbuf(rxr, ag_cons, mbuf);
 487
 488                 rc = -EIO;
 489                 goto next_rx;
 490         }
 491 #endif
 492         /*
 493          * TODO: Redesign this....
 494          * If the allocation fails, the packet does not get received.
 495          * Simply returning this will result in slowly falling behind
 496          * on the producer ring buffers.
 497          * Instead, "filling up" the producer just before ringing the
 498          * doorbell could be a better solution since it will let the
 499          * producer ring starve until memory is available again pushing
 500          * the drops into hardware and getting them out of the driver
 501          * allowing recovery to a full producer ring.
 502          *
 503          * This could also help with cache usage by preventing per-packet
 504          * calls in favour of a tight loop with the same function being called
 505          * in it.
 506          */
 507         prod = RING_NEXT(rxr->rx_ring_struct, prod);
 508         if (bnxt_alloc_rx_data(rxq, rxr, prod)) {
 509                 PMD_DRV_LOG(ERR, "mbuf alloc failed with prod=0x%x\n", prod);
 510                 rc = -ENOMEM;
 511                 goto rx;
 512         }
 513         rxr->rx_prod = prod;
 514         /*
 515          * All MBUFs are allocated with the same size under DPDK,
 516          * no optimization for rx_copy_thresh
 517          */
 518 rx:
 519         *rx_pkt = mbuf;
 520
 521 next_rx:
 522
 523         *raw_cons = tmp_raw_cons;
 524
 525         return rc;
 526 }
 527
 528 uint16_t bnxt_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 529                                uint16_t nb_pkts)
 530 {
 531         struct bnxt_rx_queue *rxq = rx_queue;
 532         struct bnxt_cp_ring_info *cpr = rxq->cp_ring;
 533         struct bnxt_rx_ring_info *rxr = rxq->rx_ring;
 534         uint32_t raw_cons = cpr->cp_raw_cons;
 535         uint32_t cons;
 536         int nb_rx_pkts = 0;
 537         struct rx_pkt_cmpl *rxcmp;
 538         uint16_t prod = rxr->rx_prod;
 539         uint16_t ag_prod = rxr->ag_prod;
 540         int rc = 0;
 541         bool evt = false;
 542
 543         /* If Rx Q was stopped return. RxQ0 cannot be stopped. */
 544         if (unlikely(((rxq->rx_deferred_start ||
 545                        !rte_spinlock_trylock(&rxq->lock)) &&
 546                       rxq->queue_id)))
 547                 return 0;
 548
 549         /* Handle RX burst request */
 550         while (1) {
 551                 cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
 552                 rte_prefetch0(&cpr->cp_desc_ring[cons]);
 553                 rxcmp = (struct rx_pkt_cmpl *)&cpr->cp_desc_ring[cons];
 554
 555                 if (!CMP_VALID(rxcmp, raw_cons, cpr->cp_ring_struct))
 556                         break;
 557                 cpr->valid = FLIP_VALID(cons,
 558                                         cpr->cp_ring_struct->ring_mask,
 559                                         cpr->valid);
 560
 561                 /* TODO: Avoid magic numbers... */
 562                 if ((CMP_TYPE(rxcmp) & 0x30) == 0x10) {
 563                         rc = bnxt_rx_pkt(&rx_pkts[nb_rx_pkts], rxq, &raw_cons);
 564                         if (likely(!rc) || rc == -ENOMEM)
 565                                 nb_rx_pkts++;
 566                         if (rc == -EBUSY)       /* partial completion */
 567                                 break;
 568                 } else {
 569                         evt =
 570                         bnxt_event_hwrm_resp_handler(rxq->bp,
 571                                                      (struct cmpl_base *)rxcmp);
 572                 }
 573
 574                 raw_cons = NEXT_RAW_CMP(raw_cons);
 575                 if (nb_rx_pkts == nb_pkts || evt)
 576                         break;
 577                 /* Post some Rx buf early in case of larger burst processing */
 578                 if (nb_rx_pkts == BNXT_RX_POST_THRESH)
 579                         B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 580         }
 581
 582         cpr->cp_raw_cons = raw_cons;
 583         if (!nb_rx_pkts && !evt) {
 584                 /*
 585                  * For PMD, there is no need to keep on pushing to REARM
 586                  * the doorbell if there are no new completions
 587                  */
 588                 goto done;
 589         }
 590
 591         if (prod != rxr->rx_prod)
 592                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 593
 594         /* Ring the AGG ring DB */
 595         if (ag_prod != rxr->ag_prod)
 596                 B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 597
 598         B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 599
 600         /* Attempt to alloc Rx buf in case of a previous allocation failure. */
 601         if (rc == -ENOMEM) {
 602                 int i;
 603
 604                 for (i = prod; i <= nb_rx_pkts;
 605                         i = RING_NEXT(rxr->rx_ring_struct, i)) {
 606                         struct bnxt_sw_rx_bd *rx_buf = &rxr->rx_buf_ring[i];
 607
 608                         /* Buffer already allocated for this index. */
 609                         if (rx_buf->mbuf != NULL)
 610                                 continue;
 611
 612                         /* This slot is empty. Alloc buffer for Rx */
 613                         if (!bnxt_alloc_rx_data(rxq, rxr, i)) {
 614                                 rxr->rx_prod = i;
 615                                 B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 616                         } else {
 617                                 PMD_DRV_LOG(ERR, "Alloc  mbuf failed\n");
 618                                 break;
 619                         }
 620                 }
 621         }
 622
 623 done:
 624         rte_spinlock_unlock(&rxq->lock);
 625
 626         return nb_rx_pkts;
 627 }
 628
 629 void bnxt_free_rx_rings(struct bnxt *bp)
 630 {
 631         int i;
 632         struct bnxt_rx_queue *rxq;
 633
 634         if (!bp->rx_queues)
 635                 return;
 636
 637         for (i = 0; i < (int)bp->rx_nr_rings; i++) {
 638                 rxq = bp->rx_queues[i];
 639                 if (!rxq)
 640                         continue;
 641
 642                 bnxt_free_ring(rxq->rx_ring->rx_ring_struct);
 643                 rte_free(rxq->rx_ring->rx_ring_struct);
 644
 645                 /* Free the Aggregator ring */
 646                 bnxt_free_ring(rxq->rx_ring->ag_ring_struct);
 647                 rte_free(rxq->rx_ring->ag_ring_struct);
 648                 rxq->rx_ring->ag_ring_struct = NULL;
 649
 650                 rte_free(rxq->rx_ring);
 651
 652                 bnxt_free_ring(rxq->cp_ring->cp_ring_struct);
 653                 rte_free(rxq->cp_ring->cp_ring_struct);
 654                 rte_free(rxq->cp_ring);
 655
 656                 rte_free(rxq);
 657                 bp->rx_queues[i] = NULL;
 658         }
 659 }
 660
 661 int bnxt_init_rx_ring_struct(struct bnxt_rx_queue *rxq, unsigned int socket_id)
 662 {
 663         struct bnxt_cp_ring_info *cpr;
 664         struct bnxt_rx_ring_info *rxr;
 665         struct bnxt_ring *ring;
 666
 667         rxq->rx_buf_use_size = BNXT_MAX_MTU + ETHER_HDR_LEN + ETHER_CRC_LEN +
 668                                (2 * VLAN_TAG_SIZE);
 669         rxq->rx_buf_size = rxq->rx_buf_use_size + sizeof(struct rte_mbuf);
 670
 671         rxr = rte_zmalloc_socket("bnxt_rx_ring",
 672                                  sizeof(struct bnxt_rx_ring_info),
 673                                  RTE_CACHE_LINE_SIZE, socket_id);
 674         if (rxr == NULL)
 675                 return -ENOMEM;
 676         rxq->rx_ring = rxr;
 677
 678         ring = rte_zmalloc_socket("bnxt_rx_ring_struct",
 679                                    sizeof(struct bnxt_ring),
 680                                    RTE_CACHE_LINE_SIZE, socket_id);
 681         if (ring == NULL)
 682                 return -ENOMEM;
 683         rxr->rx_ring_struct = ring;
 684         ring->ring_size = rte_align32pow2(rxq->nb_rx_desc);
 685         ring->ring_mask = ring->ring_size - 1;
 686         ring->bd = (void *)rxr->rx_desc_ring;
 687         ring->bd_dma = rxr->rx_desc_mapping;
 688         ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_rx_bd);
 689         ring->vmem = (void **)&rxr->rx_buf_ring;
 690
 691         cpr = rte_zmalloc_socket("bnxt_rx_ring",
 692                                  sizeof(struct bnxt_cp_ring_info),
 693                                  RTE_CACHE_LINE_SIZE, socket_id);
 694         if (cpr == NULL)
 695                 return -ENOMEM;
 696         rxq->cp_ring = cpr;
 697
 698         ring = rte_zmalloc_socket("bnxt_rx_ring_struct",
 699                                    sizeof(struct bnxt_ring),
 700                                    RTE_CACHE_LINE_SIZE, socket_id);
 701         if (ring == NULL)
 702                 return -ENOMEM;
 703         cpr->cp_ring_struct = ring;
 704         ring->ring_size = rte_align32pow2(rxr->rx_ring_struct->ring_size *
 705                                           (2 + AGG_RING_SIZE_FACTOR));
 706         ring->ring_mask = ring->ring_size - 1;
 707         ring->bd = (void *)cpr->cp_desc_ring;
 708         ring->bd_dma = cpr->cp_desc_mapping;
 709         ring->vmem_size = 0;
 710         ring->vmem = NULL;
 711
 712         /* Allocate Aggregator rings */
 713         ring = rte_zmalloc_socket("bnxt_rx_ring_struct",
 714                                    sizeof(struct bnxt_ring),
 715                                    RTE_CACHE_LINE_SIZE, socket_id);
 716         if (ring == NULL)
 717                 return -ENOMEM;
 718         rxr->ag_ring_struct = ring;
 719         ring->ring_size = rte_align32pow2(rxq->nb_rx_desc *
 720                                           AGG_RING_SIZE_FACTOR);
 721         ring->ring_mask = ring->ring_size - 1;
 722         ring->bd = (void *)rxr->ag_desc_ring;
 723         ring->bd_dma = rxr->ag_desc_mapping;
 724         ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_rx_bd);
 725         ring->vmem = (void **)&rxr->ag_buf_ring;
 726
 727         return 0;
 728 }
 729
 730 static void bnxt_init_rxbds(struct bnxt_ring *ring, uint32_t type,
 731                             uint16_t len)
 732 {
 733         uint32_t j;
 734         struct rx_prod_pkt_bd *rx_bd_ring = (struct rx_prod_pkt_bd *)ring->bd;
 735
 736         if (!rx_bd_ring)
 737                 return;
 738         for (j = 0; j < ring->ring_size; j++) {
 739                 rx_bd_ring[j].flags_type = rte_cpu_to_le_16(type);
 740                 rx_bd_ring[j].len = rte_cpu_to_le_16(len);
 741                 rx_bd_ring[j].opaque = j;
 742         }
 743 }
 744
 745 int bnxt_init_one_rx_ring(struct bnxt_rx_queue *rxq)
 746 {
 747         struct bnxt_rx_ring_info *rxr;
 748         struct bnxt_ring *ring;
 749         uint32_t prod, type;
 750         unsigned int i;
 751         uint16_t size;
 752
 753         size = rte_pktmbuf_data_room_size(rxq->mb_pool) - RTE_PKTMBUF_HEADROOM;
 754         if (rxq->rx_buf_use_size <= size)
 755                 size = rxq->rx_buf_use_size;
 756
 757         type = RX_PROD_PKT_BD_TYPE_RX_PROD_PKT | RX_PROD_PKT_BD_FLAGS_EOP_PAD;
 758
 759         rxr = rxq->rx_ring;
 760         ring = rxr->rx_ring_struct;
 761         bnxt_init_rxbds(ring, type, size);
 762
 763         prod = rxr->rx_prod;
 764         for (i = 0; i < ring->ring_size; i++) {
 765                 if (bnxt_alloc_rx_data(rxq, rxr, prod) != 0) {
 766                         PMD_DRV_LOG(WARNING,
 767                                 "init'ed rx ring %d with %d/%d mbufs only\n",
 768                                 rxq->queue_id, i, ring->ring_size);
 769                         break;
 770                 }
 771                 rxr->rx_prod = prod;
 772                 prod = RING_NEXT(rxr->rx_ring_struct, prod);
 773         }
 774
 775         ring = rxr->ag_ring_struct;
 776         type = RX_PROD_AGG_BD_TYPE_RX_PROD_AGG;
 777         bnxt_init_rxbds(ring, type, size);
 778         prod = rxr->ag_prod;
 779
 780         for (i = 0; i < ring->ring_size; i++) {
 781                 if (bnxt_alloc_ag_data(rxq, rxr, prod) != 0) {
 782                         PMD_DRV_LOG(WARNING,
 783                         "init'ed AG ring %d with %d/%d mbufs only\n",
 784                         rxq->queue_id, i, ring->ring_size);
 785                         break;
 786                 }
 787                 rxr->ag_prod = prod;
 788                 prod = RING_NEXT(rxr->ag_ring_struct, prod);
 789         }
 790         PMD_DRV_LOG(DEBUG, "AGG Done!\n");
 791
 792         if (rxr->tpa_info) {
 793                 for (i = 0; i < BNXT_TPA_MAX; i++) {
 794                         rxr->tpa_info[i].mbuf =
 795                                 __bnxt_alloc_rx_data(rxq->mb_pool);
 796                         if (!rxr->tpa_info[i].mbuf) {
 797                                 rte_atomic64_inc(&rxq->rx_mbuf_alloc_fail);
 798                                 return -ENOMEM;
 799                         }
 800                 }
 801         }
 802         PMD_DRV_LOG(DEBUG, "TPA alloc Done!\n");
 803
 804         return 0;
 805 }