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); 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 | PKT_TX_OUTER_IP_CKSUM | 165 PKT_TX_TUNNEL_GRE | PKT_TX_TUNNEL_VXLAN | 166 PKT_TX_TUNNEL_GENEVE)) 167 long_bd = true; 168 169 tx_buf = &txr->tx_buf_ring[txr->tx_prod]; 170 tx_buf->mbuf = tx_pkt; 171 tx_buf->nr_bds = long_bd + tx_pkt->nb_segs; 172 last_prod = (txr->tx_prod + tx_buf->nr_bds - 1) & 173 txr->tx_ring_struct->ring_mask; 174 175 if (unlikely(bnxt_tx_avail(txr) < tx_buf->nr_bds)) 176 return -ENOMEM; 177 178 txbd = &txr->tx_desc_ring[txr->tx_prod]; 179 txbd->opaque = txr->tx_prod; 180 txbd->flags_type = tx_buf->nr_bds << TX_BD_LONG_FLAGS_BD_CNT_SFT; 181 txbd->len = tx_pkt->data_len; 182 if (txbd->len >= 2014) 183 txbd->flags_type |= TX_BD_LONG_FLAGS_LHINT_GTE2K; 184 else 185 txbd->flags_type |= lhint_arr[txbd->len >> 9]; 186 txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(tx_buf->mbuf)); 187 188 if (long_bd) { 189 txbd->flags_type |= TX_BD_LONG_TYPE_TX_BD_LONG; 190 vlan_tag_flags = 0; 191 cfa_action = 0; 192 if (tx_buf->mbuf->ol_flags & PKT_TX_VLAN_PKT) { 193 /* shurd: Should this mask at 194 * TX_BD_LONG_CFA_META_VLAN_VID_MASK? 195 */ 196 vlan_tag_flags = TX_BD_LONG_CFA_META_KEY_VLAN_TAG | 197 tx_buf->mbuf->vlan_tci; 198 /* Currently supports 8021Q, 8021AD vlan offloads 199 * QINQ1, QINQ2, QINQ3 vlan headers are deprecated 200 */ 201 /* DPDK only supports 802.11q VLAN packets */ 202 vlan_tag_flags |= 203 TX_BD_LONG_CFA_META_VLAN_TPID_TPID8100; 204 } 205 206 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod); 207 208 txbd1 = (struct tx_bd_long_hi *) 209 &txr->tx_desc_ring[txr->tx_prod]; 210 txbd1->lflags = 0; 211 txbd1->cfa_meta = vlan_tag_flags; 212 txbd1->cfa_action = cfa_action; 213 214 if (tx_pkt->ol_flags & PKT_TX_TCP_SEG) { 215 /* TSO */ 216 txbd1->lflags |= TX_BD_LONG_LFLAGS_LSO; 217 txbd1->hdr_size = tx_pkt->l2_len + tx_pkt->l3_len + 218 tx_pkt->l4_len + tx_pkt->outer_l2_len + 219 tx_pkt->outer_l3_len; 220 txbd1->mss = tx_pkt->tso_segsz; 221 222 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_UDP_CKSUM) == 223 PKT_TX_OIP_IIP_TCP_UDP_CKSUM) { 224 /* Outer IP, Inner IP, Inner TCP/UDP CSO */ 225 txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM; 226 txbd1->mss = 0; 227 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_TCP_CKSUM) == 228 PKT_TX_OIP_IIP_TCP_CKSUM) { 229 /* Outer IP, Inner IP, Inner TCP/UDP CSO */ 230 txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM; 231 txbd1->mss = 0; 232 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_UDP_CKSUM) == 233 PKT_TX_OIP_IIP_UDP_CKSUM) { 234 /* Outer IP, Inner IP, Inner TCP/UDP CSO */ 235 txbd1->lflags |= TX_BD_FLG_TIP_IP_TCP_UDP_CHKSUM; 236 txbd1->mss = 0; 237 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_UDP_CKSUM) == 238 PKT_TX_IIP_TCP_UDP_CKSUM) { 239 /* (Inner) IP, (Inner) TCP/UDP CSO */ 240 txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM; 241 txbd1->mss = 0; 242 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_UDP_CKSUM) == 243 PKT_TX_IIP_UDP_CKSUM) { 244 /* (Inner) IP, (Inner) TCP/UDP CSO */ 245 txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM; 246 txbd1->mss = 0; 247 } else if ((tx_pkt->ol_flags & PKT_TX_IIP_TCP_CKSUM) == 248 PKT_TX_IIP_TCP_CKSUM) { 249 /* (Inner) IP, (Inner) TCP/UDP CSO */ 250 txbd1->lflags |= TX_BD_FLG_IP_TCP_UDP_CHKSUM; 251 txbd1->mss = 0; 252 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_UDP_CKSUM) == 253 PKT_TX_OIP_TCP_UDP_CKSUM) { 254 /* Outer IP, (Inner) TCP/UDP CSO */ 255 txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM; 256 txbd1->mss = 0; 257 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_UDP_CKSUM) == 258 PKT_TX_OIP_UDP_CKSUM) { 259 /* Outer IP, (Inner) TCP/UDP CSO */ 260 txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM; 261 txbd1->mss = 0; 262 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_TCP_CKSUM) == 263 PKT_TX_OIP_TCP_CKSUM) { 264 /* Outer IP, (Inner) TCP/UDP CSO */ 265 txbd1->lflags |= TX_BD_FLG_TIP_TCP_UDP_CHKSUM; 266 txbd1->mss = 0; 267 } else if ((tx_pkt->ol_flags & PKT_TX_OIP_IIP_CKSUM) == 268 PKT_TX_OIP_IIP_CKSUM) { 269 /* Outer IP, Inner IP CSO */ 270 txbd1->lflags |= TX_BD_FLG_TIP_IP_CHKSUM; 271 txbd1->mss = 0; 272 } else if ((tx_pkt->ol_flags & PKT_TX_TCP_UDP_CKSUM) == 273 PKT_TX_TCP_UDP_CKSUM) { 274 /* TCP/UDP CSO */ 275 txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM; 276 txbd1->mss = 0; 277 } else if ((tx_pkt->ol_flags & PKT_TX_TCP_CKSUM) == 278 PKT_TX_TCP_CKSUM) { 279 /* TCP/UDP CSO */ 280 txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM; 281 txbd1->mss = 0; 282 } else if ((tx_pkt->ol_flags & PKT_TX_UDP_CKSUM) == 283 PKT_TX_UDP_CKSUM) { 284 /* TCP/UDP CSO */ 285 txbd1->lflags |= TX_BD_LONG_LFLAGS_TCP_UDP_CHKSUM; 286 txbd1->mss = 0; 287 } else if ((tx_pkt->ol_flags & PKT_TX_IP_CKSUM) == 288 PKT_TX_IP_CKSUM) { 289 /* IP CSO */ 290 txbd1->lflags |= TX_BD_LONG_LFLAGS_IP_CHKSUM; 291 txbd1->mss = 0; 292 } else if ((tx_pkt->ol_flags & PKT_TX_OUTER_IP_CKSUM) == 293 PKT_TX_OUTER_IP_CKSUM) { 294 /* IP CSO */ 295 txbd1->lflags |= TX_BD_LONG_LFLAGS_T_IP_CHKSUM; 296 txbd1->mss = 0; 297 } 298 } else { 299 txbd->flags_type |= TX_BD_SHORT_TYPE_TX_BD_SHORT; 300 } 301 302 m_seg = tx_pkt->next; 303 /* i is set at the end of the if(long_bd) block */ 304 while (txr->tx_prod != last_prod) { 305 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod); 306 tx_buf = &txr->tx_buf_ring[txr->tx_prod]; 307 308 txbd = &txr->tx_desc_ring[txr->tx_prod]; 309 txbd->addr = rte_cpu_to_le_32(RTE_MBUF_DATA_DMA_ADDR(m_seg)); 310 txbd->flags_type = TX_BD_SHORT_TYPE_TX_BD_SHORT; 311 txbd->len = m_seg->data_len; 312 313 m_seg = m_seg->next; 314 } 315 316 txbd->flags_type |= TX_BD_LONG_FLAGS_PACKET_END; 317 txbd1->lflags = rte_cpu_to_le_32(txbd1->lflags); 318 319 txr->tx_prod = RING_NEXT(txr->tx_ring_struct, txr->tx_prod); 320 321 return 0; 322 } 323 324 static void bnxt_tx_cmp(struct bnxt_tx_queue *txq, int nr_pkts) 325 { 326 struct bnxt_tx_ring_info *txr = txq->tx_ring; 327 uint16_t cons = txr->tx_cons; 328 int i, j; 329 330 for (i = 0; i < nr_pkts; i++) { 331 struct bnxt_sw_tx_bd *tx_buf; 332 struct rte_mbuf *mbuf; 333 334 tx_buf = &txr->tx_buf_ring[cons]; 335 cons = RING_NEXT(txr->tx_ring_struct, cons); 336 mbuf = tx_buf->mbuf; 337 tx_buf->mbuf = NULL; 338 339 /* EW - no need to unmap DMA memory? */ 340 341 for (j = 1; j < tx_buf->nr_bds; j++) 342 cons = RING_NEXT(txr->tx_ring_struct, cons); 343 rte_pktmbuf_free(mbuf); 344 } 345 346 txr->tx_cons = cons; 347 } 348 349 static int bnxt_handle_tx_cp(struct bnxt_tx_queue *txq) 350 { 351 struct bnxt_cp_ring_info *cpr = txq->cp_ring; 352 uint32_t raw_cons = cpr->cp_raw_cons; 353 uint32_t cons; 354 int nb_tx_pkts = 0; 355 struct tx_cmpl *txcmp; 356 357 if ((txq->tx_ring->tx_ring_struct->ring_size - 358 (bnxt_tx_avail(txq->tx_ring))) > 359 txq->tx_free_thresh) { 360 while (1) { 361 cons = RING_CMP(cpr->cp_ring_struct, raw_cons); 362 txcmp = (struct tx_cmpl *)&cpr->cp_desc_ring[cons]; 363 364 if (!CMP_VALID(txcmp, raw_cons, cpr->cp_ring_struct)) 365 break; 366 cpr->valid = FLIP_VALID(cons, 367 cpr->cp_ring_struct->ring_mask, 368 cpr->valid); 369 370 if (CMP_TYPE(txcmp) == TX_CMPL_TYPE_TX_L2) 371 nb_tx_pkts++; 372 else 373 RTE_LOG_DP(DEBUG, PMD, 374 "Unhandled CMP type %02x\n", 375 CMP_TYPE(txcmp)); 376 raw_cons = NEXT_RAW_CMP(raw_cons); 377 } 378 if (nb_tx_pkts) 379 bnxt_tx_cmp(txq, nb_tx_pkts); 380 cpr->cp_raw_cons = raw_cons; 381 B_CP_DIS_DB(cpr, cpr->cp_raw_cons); 382 } 383 return nb_tx_pkts; 384 } 385 386 uint16_t bnxt_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, 387 uint16_t nb_pkts) 388 { 389 struct bnxt_tx_queue *txq = tx_queue; 390 uint16_t nb_tx_pkts = 0; 391 uint16_t db_mask = txq->tx_ring->tx_ring_struct->ring_size >> 2; 392 uint16_t last_db_mask = 0; 393 394 /* Handle TX completions */ 395 bnxt_handle_tx_cp(txq); 396 397 /* Handle TX burst request */ 398 for (nb_tx_pkts = 0; nb_tx_pkts < nb_pkts; nb_tx_pkts++) { 399 if (bnxt_start_xmit(tx_pkts[nb_tx_pkts], txq)) { 400 break; 401 } else if ((nb_tx_pkts & db_mask) != last_db_mask) { 402 B_TX_DB(txq->tx_ring->tx_doorbell, 403 txq->tx_ring->tx_prod); 404 last_db_mask = nb_tx_pkts & db_mask; 405 } 406 } 407 if (nb_tx_pkts) 408 B_TX_DB(txq->tx_ring->tx_doorbell, txq->tx_ring->tx_prod); 409 410 return nb_tx_pkts; 411 } 412