ceph/src/dpdk/drivers/net/bnxt/bnxt_txr.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) Broadcom Limited.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Broadcom Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <inttypes.h>
  35
  36 #include <rte_byteorder.h>
  37 #include <rte_malloc.h>
  38
  39 #include "bnxt.h"
  40 #include "bnxt_cpr.h"
  41 #include "bnxt_ring.h"
  42 #include "bnxt_txq.h"
  43 #include "bnxt_txr.h"
  44 #include "hsi_struct_def_dpdk.h"
  45 #include <stdbool.h>
  46
  47 /*
  48  * TX Ring handling
  49  */
  50
  51 void bnxt_free_tx_rings(struct bnxt *bp)
  52 {
  53         int i;
  54
  55         for (i = 0; i < (int)bp->tx_nr_rings; i++) {
  56                 struct bnxt_tx_queue *txq = bp->tx_queues[i];
  57
  58                 if (!txq)
  59                         continue;
  60
  61                 bnxt_free_ring(txq->tx_ring->tx_ring_struct);
  62                 rte_free(txq->tx_ring->tx_ring_struct);
  63                 rte_free(txq->tx_ring);
  64
  65                 bnxt_free_ring(txq->cp_ring->cp_ring_struct);
  66                 rte_free(txq->cp_ring->cp_ring_struct);
  67                 rte_free(txq->cp_ring);
  68
  69                 rte_free(txq);
  70                 bp->tx_queues[i] = NULL;
  71         }
  72 }
  73
  74 int bnxt_init_one_tx_ring(struct bnxt_tx_queue *txq)
  75 {
  76         struct bnxt_tx_ring_info *txr = txq->tx_ring;
  77         struct bnxt_ring *ring = txr->tx_ring_struct;
  78
  79         txq->tx_wake_thresh = ring->ring_size / 2;
  80         ring->fw_ring_id = INVALID_HW_RING_ID;
  81
  82         return 0;
  83 }
  84
  85 int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
  86 {
  87         struct bnxt_cp_ring_info *cpr;
  88         struct bnxt_tx_ring_info *txr;
  89         struct bnxt_ring *ring;
  90
  91         txr = rte_zmalloc_socket("bnxt_tx_ring",
  92                                  sizeof(struct bnxt_tx_ring_info),
  93                                  RTE_CACHE_LINE_SIZE, socket_id);
  94         if (txr == NULL)
  95                 return -ENOMEM;
  96         txq->tx_ring = txr;
  97
  98         ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
  99                                   sizeof(struct bnxt_ring),
 100                                   RTE_CACHE_LINE_SIZE, socket_id);
 101         if (ring == NULL)
 102                 return -ENOMEM;
 103         txr->tx_ring_struct = ring;
 104         ring->ring_size = rte_align32pow2(txq->nb_tx_desc + 1);
 105         ring->ring_mask = ring->ring_size - 1;
 106         ring->bd = (void *)txr->tx_desc_ring;
 107         ring->bd_dma = txr->tx_desc_mapping;
 108         ring->vmem_size = ring->ring_size * sizeof(struct bnxt_sw_tx_bd);
 109         ring->vmem = (void **)&txr->tx_buf_ring;
 110
 111         cpr = rte_zmalloc_socket("bnxt_tx_ring",
 112                                  sizeof(struct bnxt_cp_ring_info),
 113                                  RTE_CACHE_LINE_SIZE, socket_id);
 114         if (cpr == NULL)
 115                 return -ENOMEM;
 116         txq->cp_ring = cpr;
 117
 118         ring = rte_zmalloc_socket("bnxt_tx_ring_struct",
 119                                   sizeof(struct bnxt_ring),
 120                                   RTE_CACHE_LINE_SIZE, socket_id);
 121         if (ring == NULL)
 122                 return -ENOMEM;
 123         cpr->cp_ring_struct = ring;
 124         ring->ring_size = txr->tx_ring_struct->ring_size;
 125         ring->ring_mask = ring->ring_size - 1;
 126         ring->bd = (void *)cpr->cp_desc_ring;
 127         ring->bd_dma = cpr->cp_desc_mapping;
 128         ring->vmem_size = 0;
 129         ring->vmem = NULL;
 130
 131         return 0;
 132 }
 133
 134 static inline uint32_t bnxt_tx_avail(struct bnxt_tx_ring_info *txr)
 135 {
 136         /* Tell compiler to fetch tx indices from memory. */
 137         rte_compiler_barrier();
 138
 139         return txr->tx_ring_struct->ring_size -
 140                 ((txr->tx_prod - txr->tx_cons) &
 141                         txr->tx_ring_struct->ring_mask) - 1;
 142 }
 143
 144 static uint16_t bnxt_start_xmit(struct rte_mbuf *tx_pkt,
 145                                 struct bnxt_tx_queue *txq)
 146 {
 147         struct bnxt_tx_ring_info *txr = txq->tx_ring;
 148         struct tx_bd_long *txbd;
 149         struct tx_bd_long_hi *txbd1;
 150         uint32_t vlan_tag_flags, cfa_action;
 151         bool long_bd = false;
 152         uint16_t last_prod = 0;
 153         struct rte_mbuf *m_seg;
 154         struct bnxt_sw_tx_bd *tx_buf;
 155         static const uint32_t lhint_arr[4] = {
 156                 TX_BD_LONG_FLAGS_LHINT_LT512,
 157                 TX_BD_LONG_FLAGS_LHINT_LT1K,
 158                 TX_BD_LONG_FLAGS_LHINT_LT2K,
 159                 TX_BD_LONG_FLAGS_LHINT_LT2K
 160         };
 161
 162         if (tx_pkt->ol_flags & (PKT_TX_TCP_SEG | PKT_TX_TCP_CKSUM |
 163                                 PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM |
 164                                 PKT_TX_VLAN_PKT))
 165                 long_bd = true;
 166
 167         tx_buf = &txr->tx_buf_ring[txr->tx_prod];
 168         tx_buf->mbuf = tx_pkt;
 169         tx_buf->nr_bds = long_bd + tx_pkt->nb_segs;
 170         last_prod = (txr->tx_prod + tx_buf->nr_bds - 1) &
 171                                 txr->tx_ring_struct->ring_mask;
 172
 173         if (unlikely(bnxt_tx_avail(txr) < tx_buf->nr_bds))
 174                 return -ENOMEM;
 175
 176         txbd = &txr->tx_desc_ring[txr->tx_prod];
 177         txbd->opaque = txr->tx_prod;
 178         txbd->flags_type = tx_buf->nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT;
 179         txbd->len = tx_pkt->data_len;
 180         if (txbd->len >= 2014)
 181                 txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K;
 182         else
 183                 txbd->flags_type |= lhint_arr[txbd->len >> 9];
 184         txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(tx_buf->mbuf));
 185
 186         if (long_bd) {
 187                 txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG;
 188                 vlan_tag_flags = 0;
 189                 cfa_action = 0;
 190                 if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) {
 191                         /* shurd: Should this mask at
 192                          * TX_BD_LONG_CFA_META_VLAN_VID_MASK?
 193                          */
 194                         vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG |
 195                                 tx_buf->mbuf->vlan_tci;
 196                         /* Currently supports 8021Q, 8021AD vlan offloads
 197                          * QINQ1, QINQ2, QINQ3 vlan headers are deprecated
 198                          */
 199                         /* DPDK only supports 802.11q VLAN packets */
 200                         vlan_tag_flags |=
 201                                         TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100;
 202                 }
 203
 204                 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
 205
 206                 txbd1 = (struct tx_bd_long_hi *)
 207                                         &txr->tx_desc_ring[txr->tx_prod];
 208                 txbd1->lflags = 0;
 209                 txbd1->cfa_meta = vlan_tag_flags;
 210                 txbd1->cfa_action = cfa_action;
 211
 212                 if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) {
 213                         /* TSO */
 214                         txbd1->lflags = TX_BD_LONG_LFLAGS_LSO;
 215                         txbd1->hdr_size = tx_pkt->l2_len + tx_pkt->l3_len +
 216                                         tx_pkt->l4_len;
 217                         txbd1->mss = tx_pkt->tso_segsz;
 218
 219                 } else if (tx_pkt->ol_flags & (PKT_TX_TCP_CKSUM |
 220                                         PKT_TX_UDP_CKSUM)) {
 221                         /* TCP/UDP CSO */
 222                         txbd1->lflags = TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM;
 223                         txbd1->mss = 0;
 224
 225                 } else if (tx_pkt->ol_flags & PKT_TX_IP_CKSUM) {
 226                         /* IP CSO */
 227                         txbd1->lflags = TX_BD_LONG_LFLAGS_IP_CHKSUM;
 228                         txbd1->mss = 0;
 229                 }
 230         } else {
 231                 txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT;
 232         }
 233
 234         m_seg = tx_pkt->next;
 235         /* i is set at the end of the if(long_bd) block */
 236         while (txr->tx_prod != last_prod) {
 237                 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
 238                 tx_buf = &txr->tx_buf_ring[txr->tx_prod];
 239
 240                 txbd = &txr->tx_desc_ring[txr->tx_prod];
 241                 txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(m_seg));
 242                 txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT;
 243                 txbd->len = m_seg->data_len;
 244
 245                 m_seg = m_seg->next;
 246         }
 247
 248         txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END;
 249
 250         txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod);
 251
 252         return 0;
 253 }
 254
 255 static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts)
 256 {
 257         struct bnxt_tx_ring_info *txr = txq->tx_ring;
 258         uint16_t cons = txr->tx_cons;
 259         int i, j;
 260
 261         for (i = 0; i < nr_pkts; i++) {
 262                 struct bnxt_sw_tx_bd *tx_buf;
 263                 struct rte_mbuf *mbuf;
 264
 265                 tx_buf = &txr->tx_buf_ring[cons];
 266                 cons = RING_NEXT(txr->tx_ring_struct, cons);
 267                 mbuf = tx_buf->mbuf;
 268                 tx_buf->mbuf = NULL;
 269
 270                 /* EW - no need to unmap DMA memory? */
 271
 272                 for (j = 1; j < tx_buf->nr_bds; j++)
 273                         cons = RING_NEXT(txr->tx_ring_struct, cons);
 274                 rte_pktmbuf_free(mbuf);
 275         }
 276
 277         txr->tx_cons = cons;
 278 }
 279
 280 static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq)
 281 {
 282         struct bnxt_cp_ring_info *cpr = txq->cp_ring;
 283         uint32_t raw_cons = cpr->cp_raw_cons;
 284         uint32_t cons;
 285         int nb_tx_pkts = 0;
 286         struct tx_cmpl *txcmp;
 287
 288         if ((txq->tx_ring->tx_ring_struct->ring_size -
 289                         (bnxt_tx_avail(txq->tx_ring))) >
 290                         txq->tx_free_thresh) {
 291                 while (1) {
 292                         cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
 293                         txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons];
 294
 295                         if (!CMP_VALID(txcmp, raw_cons, cpr->cp_ring_struct))
 296                                 break;
 297
 298                         if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2)
 299                                 nb_tx_pkts++;
 300                         else
 301                                 RTE_LOG(DEBUG, PMD,
 302                                                 "Unhandled CMP type %02x\n",
 303                                                 CMP_TYPE(txcmp));
 304                         raw_cons = NEXT_RAW_CMP(raw_cons);
 305                 }
 306                 if (nb_tx_pkts)
 307                         bnxt_tx_cmp(txq, nb_tx_pkts);
 308                 cpr->cp_raw_cons = raw_cons;
 309                 B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 310         }
 311         return nb_tx_pkts;
 312 }
 313
 314 uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 315                                uint16_t nb_pkts)
 316 {
 317         struct bnxt_tx_queue *txq = tx_queue;
 318         uint16_t nb_tx_pkts = 0;
 319         uint16_t db_mask = txq->tx_ring->tx_ring_struct->ring_size >> 2;
 320         uint16_t last_db_mask = 0;
 321
 322         /* Handle TX completions */
 323         bnxt_handle_tx_cp(txq);
 324
 325         /* Handle TX burst request */
 326         for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) {
 327                 if (bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq)) {
 328                         break;
 329                 } else if ((nb_tx_pkts & db_mask) != last_db_mask) {
 330                         B_TX_DB(txq->tx_ring->tx_doorbell,
 331                                         txq->tx_ring->tx_prod);
 332                         last_db_mask = nb_tx_pkts & db_mask;
 333                 }
 334         }
 335         if (nb_tx_pkts)
 336                 B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod);
 337
 338         return nb_tx_pkts;
 339 }