ceph/src/seastar/dpdk/drivers/net/bnxt/bnxt_txr.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
   8 #include <rte_byteorder.h>
   9 #include <rte_malloc.h>
  10
  11 #include "bnxt.h"
  12 #include "bnxt_cpr.h"
  13 #include "bnxt_ring.h"
  14 #include "bnxt_txq.h"
  15 #include "bnxt_txr.h"
  16 #include "hsi_struct_def_dpdk.h"
  17 #include <stdbool.h>
  18
  19 /*
  20  * TX Ring handling
  21  */
  22
  23 void bnxt_free_tx_rings(struct bnxt *bp)
  24 {
  25         int i;
  26
  27         for (i = 0; i < (int)bp->tx_nr_rings; i++) {
  28                 struct bnxt_tx_queue *txq = bp->tx_queues[i];
  29
  30                 if (!txq)
  31                         continue;
  32
  33                 bnxt_free_ring(txq->tx_ring->tx_ring_struct);
  34                 rte_free(txq->tx_ring->tx_ring_struct);
  35                 rte_free(txq->tx_ring);
  36
  37                 bnxt_free_ring(txq->cp_ring->cp_ring_struct);
  38                 rte_free(txq->cp_ring->cp_ring_struct);
  39                 rte_free(txq->cp_ring);
  40
  41                 rte_free(txq);
  42                 bp->tx_queues[i] = NULL;
  43         }
  44 }
  45
  46 int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
  47 {
  48         struct bnxt_tx_ring_info *txr = txq->tx_ring;
  49         struct bnxt_ring *ring = txr->tx_ring_struct;
  50
  51         txq->tx_wake_thresh = ring->ring_size / 2;
  52         ring->fw_ring_id = INVALID_HW_RING_ID;
  53
  54         return 0;
  55 }
  56
  57 int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
  58 {
  59         struct bnxt_cp_ring_info *cpr;
  60         struct bnxt_tx_ring_info *txr;
  61         struct bnxt_ring *ring;
  62
  63         txr = rte_zmalloc_socket("bnxt_tx_ring",
  64                                  sizeof(struct bnxt_tx_ring_info),
  65                                  RTE_CACHE_LINE_SIZE, socket_id);
  66         if (txr == NULL)
  67                 return -ENOMEM;
  68         txq->tx_ring = txr;
  69
  70         ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
  71                                   sizeof(struct bnxt_ring),
  72                                   RTE_CACHE_LINE_SIZE, socket_id);
  73         if (ring == NULL)
  74                 return -ENOMEM;
  75         txr->tx_ring_struct = ring;
  76         ring->ring_size = rte_align32pow2(txq->nb_tx_desc);
  77         ring->ring_mask = ring->ring_size - 1;
  78         ring->bd = (void *)txr->tx_desc_ring;
  79         ring->bd_dma = txr->tx_desc_mapping;
  80         ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_tx_bd);
  81         ring->vmem = (void **)&txr->tx_buf_ring;
  82
  83         cpr = rte_zmalloc_socket("bnxt_tx_ring",
  84                                  sizeof(struct bnxt_cp_ring_info),
  85                                  RTE_CACHE_LINE_SIZE, socket_id);
  86         if (cpr == NULL)
  87                 return -ENOMEM;
  88         txq->cp_ring = cpr;
  89
  90         ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
  91                                   sizeof(struct bnxt_ring),
  92                                   RTE_CACHE_LINE_SIZE, socket_id);
  93         if (ring == NULL)
  94                 return -ENOMEM;
  95         cpr->cp_ring_struct = ring;
  96         ring->ring_size = txr->tx_ring_struct->ring_size;
  97         ring->ring_mask = ring->ring_size - 1;
  98         ring->bd = (void *)cpr->cp_desc_ring;
  99         ring->bd_dma = cpr->cp_desc_mapping;
 100         ring->vmem_size = 0;
 101         ring->vmem = NULL;
 102
 103         return 0;
 104 }
 105
 106 static inline uint32_t bnxt_tx_avail(struct bnxt_tx_ring_info *txr)
 107 {
 108         /* Tell compiler to fetch tx indices from memory. */
 109         rte_compiler_barrier();
 110
 111         return txr->tx_ring_struct->ring_size -
 112                 ((txr->tx_prod - txr->tx_cons) &
 113                         txr->tx_ring_struct->ring_mask) - 1;
 114 }
 115
 116 static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
 117                                 struct bnxt_tx_queue *txq,
 118                                 uint16_t *coal_pkts,
 119                                 uint16_t *cmpl_next)
 120 {
 121         struct bnxt_tx_ring_info *txr = txq->tx_ring;
 122         struct tx_bd_long *txbd;
 123         struct tx_bd_long_hi *txbd1 = NULL;
 124         uint32_t vlan_tag_flags, cfa_action;
 125         bool long_bd = false;
 126         uint16_t last_prod = 0;
 127         struct rte_mbuf *m_seg;
 128         struct bnxt_sw_tx_bd *tx_buf;
 129         static const uint32_t lhint_arr[4] = {
 130                 TX_BD_LONG_FLAGS_LHINT_LT512,
 131                 TX_BD_LONG_FLAGS_LHINT_LT1K,
 132                 TX_BD_LONG_FLAGS_LHINT_LT2K,
 133                 TX_BD_LONG_FLAGS_LHINT_LT2K
 134         };
 135
 136         if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
 137                                 PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
 138                                 PKT_TX_VLAN_PKT | PKT_TX_OUTER_IP_CKSUM |
 139                                 PKT_TX_TUNNEL_GRE | PKT_TX_TUNNEL_VXLAN |
 140                                 PKT_TX_TUNNEL_GENEVE))
 141                 long_bd = true;
 142
 143         tx_buf = &txr->tx_buf_ring[txr->tx_prod];
 144         tx_buf->mbuf = tx_pkt;
 145         tx_buf->nr_bds = long_bd + tx_pkt->nb_segs;
 146         last_prod = (txr->tx_prod + tx_buf->nr_bds - 1) &
 147                                 txr->tx_ring_struct->ring_mask;
 148
 149         if (unlikely(bnxt_tx_avail(txr) < tx_buf->nr_bds))
 150                 return -ENOMEM;
 151
 152         txbd = &txr->tx_desc_ring[txr->tx_prod];
 153         txbd->opaque = *coal_pkts;
 154         txbd->flags_type = tx_buf->nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
 155         txbd->flags_type |= TX_BD_SHORT_FLAGS_COAL_NOW;
 156         if (!*cmpl_next) {
 157                 txbd->flags_type |= TX_BD_LONG_FLAGS_NO_CMPL;
 158         } else {
 159                 *coal_pkts = 0;
 160                 *cmpl_next = false;
 161         }
 162         txbd->len = tx_pkt->data_len;
 163         if (tx_pkt->pkt_len >= 2014)
 164                 txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
 165         else
 166                 txbd->flags_type |= lhint_arr[tx_pkt->pkt_len >> 9];
 167         txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(tx_buf->mbuf));
 168
 169         if (long_bd) {
 170                 txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
 171                 vlan_tag_flags = 0;
 172                 cfa_action = 0;
 173                 if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
 174                         /* shurd: Should this mask at
 175                          * TX_BD_LONG_CFA_META_VLAN_VID_MASK?
 176                          */
 177                         vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
 178                                 tx_buf->mbuf->vlan_tci;
 179                         /* Currently supports 8021Q, 8021AD vlan offloads
 180                          * QINQ1, QINQ2, QINQ3 vlan headers are deprecated
 181                          */
 182                         /* DPDK only supports 802.11q VLAN packets */
 183                         vlan_tag_flags |=
 184                                         TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
 185                 }
 186
 187                 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
 188
 189                 txbd1 = (struct tx_bd_long_hi *)
 190                                         &txr->tx_desc_ring[txr->tx_prod];
 191                 txbd1->lflags = 0;
 192                 txbd1->cfa_meta = vlan_tag_flags;
 193                 txbd1->cfa_action = cfa_action;
 194
 195                 if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
 196                         /* TSO */
 197                         txbd1->lflags |= TX_BD_LONG_LFLAGS_LSO;
 198                         txbd1->hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
 199                                         tx_pkt->l4_len + tx_pkt->outer_l2_len +
 200                                         tx_pkt->outer_l3_len;
 201                         txbd1->mss = tx_pkt->tso_segsz;
 202
 203                 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_UDP_CKSUM) ==
 204                            PKT_TX_OIP_IIP_TCP_UDP_CKSUM) {
 205                         /* Outer IP, Inner IP, Inner TCP/UDP CSO */
 206                         txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
 207                         txbd1->mss = 0;
 208                 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_CKSUM) ==
 209                            PKT_TX_OIP_IIP_TCP_CKSUM) {
 210                         /* Outer IP, Inner IP, Inner TCP/UDP CSO */
 211                         txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
 212                         txbd1->mss = 0;
 213                 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_UDP_CKSUM) ==
 214                            PKT_TX_OIP_IIP_UDP_CKSUM) {
 215                         /* Outer IP, Inner IP, Inner TCP/UDP CSO */
 216                         txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM;
 217                         txbd1->mss = 0;
 218                 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_UDP_CKSUM) ==
 219                            PKT_TX_IIP_TCP_UDP_CKSUM) {
 220                         /* (Inner) IP, (Inner) TCP/UDP CSO */
 221                         txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
 222                         txbd1->mss = 0;
 223                 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_UDP_CKSUM) ==
 224                            PKT_TX_IIP_UDP_CKSUM) {
 225                         /* (Inner) IP, (Inner) TCP/UDP CSO */
 226                         txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
 227                         txbd1->mss = 0;
 228                 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_CKSUM) ==
 229                            PKT_TX_IIP_TCP_CKSUM) {
 230                         /* (Inner) IP, (Inner) TCP/UDP CSO */
 231                         txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM;
 232                         txbd1->mss = 0;
 233                 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_UDP_CKSUM) ==
 234                            PKT_TX_OIP_TCP_UDP_CKSUM) {
 235                         /* Outer IP, (Inner) TCP/UDP CSO */
 236                         txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
 237                         txbd1->mss = 0;
 238                 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_UDP_CKSUM) ==
 239                            PKT_TX_OIP_UDP_CKSUM) {
 240                         /* Outer IP, (Inner) TCP/UDP CSO */
 241                         txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
 242                         txbd1->mss = 0;
 243                 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_CKSUM) ==
 244                            PKT_TX_OIP_TCP_CKSUM) {
 245                         /* Outer IP, (Inner) TCP/UDP CSO */
 246                         txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM;
 247                         txbd1->mss = 0;
 248                 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_CKSUM) ==
 249                            PKT_TX_OIP_IIP_CKSUM) {
 250                         /* Outer IP, Inner IP CSO */
 251                         txbd1->lflags |= TX_BD_FLG_TIP_IP_CHKSUM;
 252                         txbd1->mss = 0;
 253                 } else if ((tx_pkt->ol_flags & PKT_TX_TCP_UDP_CKSUM) ==
 254                            PKT_TX_TCP_UDP_CKSUM) {
 255                         /* TCP/UDP CSO */
 256                         txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
 257                         txbd1->mss = 0;
 258                 } else if ((tx_pkt->ol_flags & PKT_TX_TCP_CKSUM) ==
 259                            PKT_TX_TCP_CKSUM) {
 260                         /* TCP/UDP CSO */
 261                         txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
 262                         txbd1->mss = 0;
 263                 } else if ((tx_pkt->ol_flags & PKT_TX_UDP_CKSUM) ==
 264                            PKT_TX_UDP_CKSUM) {
 265                         /* TCP/UDP CSO */
 266                         txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
 267                         txbd1->mss = 0;
 268                 } else if ((tx_pkt->ol_flags & PKT_TX_IP_CKSUM) ==
 269                            PKT_TX_IP_CKSUM) {
 270                         /* IP CSO */
 271                         txbd1->lflags |= TX_BD_LONG_LFLAGS_IP_CHKSUM;
 272                         txbd1->mss = 0;
 273                 } else if ((tx_pkt->ol_flags & PKT_TX_OUTER_IP_CKSUM) ==
 274                            PKT_TX_OUTER_IP_CKSUM) {
 275                         /* IP CSO */
 276                         txbd1->lflags |= TX_BD_LONG_LFLAGS_T_IP_CHKSUM;
 277                         txbd1->mss = 0;
 278                 }
 279         } else {
 280                 txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
 281         }
 282
 283         m_seg = tx_pkt->next;
 284         /* i is set at the end of the if(long_bd) block */
 285         while (txr->tx_prod != last_prod) {
 286                 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
 287                 tx_buf = &txr->tx_buf_ring[txr->tx_prod];
 288
 289                 txbd = &txr->tx_desc_ring[txr->tx_prod];
 290                 txbd->address = rte_cpu_to_le_64(rte_mbuf_data_iova(m_seg));
 291                 txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
 292                 txbd->len = m_seg->data_len;
 293
 294                 m_seg = m_seg->next;
 295         }
 296
 297         txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;
 298         if (txbd1)
 299                 txbd1->lflags = rte_cpu_to_le_32(txbd1->lflags);
 300
 301         txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
 302
 303         return 0;
 304 }
 305
 306 static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
 307 {
 308         struct bnxt_tx_ring_info *txr = txq->tx_ring;
 309         uint16_t cons = txr->tx_cons;
 310         int i, j;
 311
 312         for (i = 0; i < nr_pkts; i++) {
 313                 struct bnxt_sw_tx_bd *tx_buf;
 314                 struct rte_mbuf *mbuf;
 315
 316                 tx_buf = &txr->tx_buf_ring[cons];
 317                 cons = RING_NEXT(txr->tx_ring_struct, cons);
 318                 mbuf = tx_buf->mbuf;
 319                 tx_buf->mbuf = NULL;
 320
 321                 /* EW - no need to unmap DMA memory? */
 322
 323                 for (j = 1; j < tx_buf->nr_bds; j++)
 324                         cons = RING_NEXT(txr->tx_ring_struct, cons);
 325                 rte_pktmbuf_free(mbuf);
 326         }
 327
 328         txr->tx_cons = cons;
 329 }
 330
 331 static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
 332 {
 333         struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 334         uint32_t raw_cons = cpr->cp_raw_cons;
 335         uint32_t cons;
 336         uint32_t nb_tx_pkts = 0;
 337         struct tx_cmpl *txcmp;
 338         struct cmpl_base *cp_desc_ring = cpr->cp_desc_ring;
 339         struct bnxt_ring *cp_ring_struct = cpr->cp_ring_struct;
 340         uint32_t ring_mask = cp_ring_struct->ring_mask;
 341         uint32_t opaque = 0;
 342
 343         if (((txq->tx_ring->tx_prod - txq->tx_ring->tx_cons) &
 344                 txq->tx_ring->tx_ring_struct->ring_mask) < txq->tx_free_thresh)
 345                 return 0;
 346
 347         do {
 348                 cons = RING_CMPL(ring_mask, raw_cons);
 349                 txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];
 350                 rte_prefetch_non_temporal(&cp_desc_ring[(cons + 2) &
 351                                                         ring_mask]);
 352
 353                 if (!CMPL_VALID(txcmp, cpr->valid))
 354                         break;
 355                 opaque = rte_cpu_to_le_32(txcmp->opaque);
 356                 NEXT_CMPL(cpr, cons, cpr->valid, 1);
 357                 rte_prefetch0(&cp_desc_ring[cons]);
 358
 359                 if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
 360                         nb_tx_pkts += opaque;
 361                 else
 362                         RTE_LOG_DP(ERR, PMD,
 363                                         "Unhandled CMP type %02x\n",
 364                                         CMP_TYPE(txcmp));
 365                 raw_cons = cons;
 366         } while (nb_tx_pkts < ring_mask);
 367
 368         if (nb_tx_pkts) {
 369                 bnxt_tx_cmp(txq, nb_tx_pkts);
 370                 cpr->cp_raw_cons = raw_cons;
 371                 B_CP_DB(cpr, cpr->cp_raw_cons, ring_mask);
 372         }
 373
 374         return nb_tx_pkts;
 375 }
 376
 377 uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 378                                uint16_t nb_pkts)
 379 {
 380         struct bnxt_tx_queue *txq = tx_queue;
 381         uint16_t nb_tx_pkts = 0;
 382         uint16_t coal_pkts = 0;
 383         uint16_t cmpl_next = txq->cmpl_next;
 384
 385         /* Handle TX completions */
 386         bnxt_handle_tx_cp(txq);
 387
 388         /* Tx queue was stopped; wait for it to be restarted */
 389         if (txq->tx_deferred_start) {
 390                 PMD_DRV_LOG(DEBUG, "Tx q stopped;return\n");
 391                 return 0;
 392         }
 393
 394         txq->cmpl_next = 0;
 395         /* Handle TX burst request */
 396         for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
 397                 int rc;
 398
 399                 /* Request a completion on first and last packet */
 400                 cmpl_next |= (nb_pkts == nb_tx_pkts + 1);
 401                 coal_pkts++;
 402                 rc = bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq,
 403                                 &coal_pkts, &cmpl_next);
 404
 405                 if (unlikely(rc)) {
 406                         /* Request a completion in next cycle */
 407                         txq->cmpl_next = 1;
 408                         break;
 409                 }
 410         }
 411
 412         if (nb_tx_pkts)
 413                 B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod);
 414
 415         return nb_tx_pkts;
 416 }
 417
 418 int bnxt_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
 419 {
 420         struct bnxt *bp = (struct bnxt *)dev->data->dev_private;
 421         struct bnxt_tx_queue *txq = bp->tx_queues[tx_queue_id];
 422
 423         dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
 424         txq->tx_deferred_start = false;
 425         PMD_DRV_LOG(DEBUG, "Tx queue started\n");
 426
 427         return 0;
 428 }
 429
 430 int bnxt_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
 431 {
 432         struct bnxt *bp = (struct bnxt *)dev->data->dev_private;
 433         struct bnxt_tx_queue *txq = bp->tx_queues[tx_queue_id];
 434
 435         /* Handle TX completions */
 436         bnxt_handle_tx_cp(txq);
 437
 438         dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
 439         txq->tx_deferred_start = true;
 440         PMD_DRV_LOG(DEBUG, "Tx queue stopped\n");
 441
 442         return 0;
 443 }