1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 /* QLogic qede NIC Driver 3 * Copyright (c) 2015-2017 QLogic Corporation 4 * Copyright (c) 2019-2020 Marvell International Ltd. 5 */ 6 7 #include <linux/netdevice.h> 8 #include <linux/etherdevice.h> 9 #include <linux/skbuff.h> 10 #include <linux/bpf_trace.h> 11 #include <net/udp_tunnel.h> 12 #include <linux/ip.h> 13 #include <net/ipv6.h> 14 #include <net/tcp.h> 15 #include <linux/if_ether.h> 16 #include <linux/if_vlan.h> 17 #include <net/ip6_checksum.h> 18 #include "qede_ptp.h" 19 20 #include <linux/qed/qed_if.h> 21 #include "qede.h" 22 /********************************* 23 * Content also used by slowpath * 24 *********************************/ 25 26 int qede_alloc_rx_buffer(struct qede_rx_queue *rxq, bool allow_lazy) 27 { 28 struct sw_rx_data *sw_rx_data; 29 struct eth_rx_bd *rx_bd; 30 dma_addr_t mapping; 31 struct page *data; 32 33 /* In case lazy-allocation is allowed, postpone allocation until the 34 * end of the NAPI run. We'd still need to make sure the Rx ring has 35 * sufficient buffers to guarantee an additional Rx interrupt. 36 */ 37 if (allow_lazy && likely(rxq->filled_buffers > 12)) { 38 rxq->filled_buffers--; 39 return 0; 40 } 41 42 data = alloc_pages(GFP_ATOMIC, 0); 43 if (unlikely(!data)) 44 return -ENOMEM; 45 46 /* Map the entire page as it would be used 47 * for multiple RX buffer segment size mapping. 48 */ 49 mapping = dma_map_page(rxq->dev, data, 0, 50 PAGE_SIZE, rxq->data_direction); 51 if (unlikely(dma_mapping_error(rxq->dev, mapping))) { 52 __free_page(data); 53 return -ENOMEM; 54 } 55 56 sw_rx_data = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; 57 sw_rx_data->page_offset = 0; 58 sw_rx_data->data = data; 59 sw_rx_data->mapping = mapping; 60 61 /* Advance PROD and get BD pointer */ 62 rx_bd = (struct eth_rx_bd *)qed_chain_produce(&rxq->rx_bd_ring); 63 WARN_ON(!rx_bd); 64 rx_bd->addr.hi = cpu_to_le32(upper_32_bits(mapping)); 65 rx_bd->addr.lo = cpu_to_le32(lower_32_bits(mapping) + 66 rxq->rx_headroom); 67 68 rxq->sw_rx_prod++; 69 rxq->filled_buffers++; 70 71 return 0; 72 } 73 74 /* Unmap the data and free skb */ 75 int qede_free_tx_pkt(struct qede_dev *edev, struct qede_tx_queue *txq, int *len) 76 { 77 u16 idx = txq->sw_tx_cons; 78 struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; 79 struct eth_tx_1st_bd *first_bd; 80 struct eth_tx_bd *tx_data_bd; 81 int bds_consumed = 0; 82 int nbds; 83 bool data_split = txq->sw_tx_ring.skbs[idx].flags & QEDE_TSO_SPLIT_BD; 84 int i, split_bd_len = 0; 85 86 if (unlikely(!skb)) { 87 DP_ERR(edev, 88 "skb is null for txq idx=%d txq->sw_tx_cons=%d txq->sw_tx_prod=%d\n", 89 idx, txq->sw_tx_cons, txq->sw_tx_prod); 90 return -1; 91 } 92 93 *len = skb->len; 94 95 first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl); 96 97 bds_consumed++; 98 99 nbds = first_bd->data.nbds; 100 101 if (data_split) { 102 struct eth_tx_bd *split = (struct eth_tx_bd *) 103 qed_chain_consume(&txq->tx_pbl); 104 split_bd_len = BD_UNMAP_LEN(split); 105 bds_consumed++; 106 } 107 dma_unmap_single(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd), 108 BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); 109 110 /* Unmap the data of the skb frags */ 111 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, bds_consumed++) { 112 tx_data_bd = (struct eth_tx_bd *) 113 qed_chain_consume(&txq->tx_pbl); 114 dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(tx_data_bd), 115 BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); 116 } 117 118 while (bds_consumed++ < nbds) 119 qed_chain_consume(&txq->tx_pbl); 120 121 /* Free skb */ 122 dev_kfree_skb_any(skb); 123 txq->sw_tx_ring.skbs[idx].skb = NULL; 124 txq->sw_tx_ring.skbs[idx].flags = 0; 125 126 return 0; 127 } 128 129 /* Unmap the data and free skb when mapping failed during start_xmit */ 130 static void qede_free_failed_tx_pkt(struct qede_tx_queue *txq, 131 struct eth_tx_1st_bd *first_bd, 132 int nbd, bool data_split) 133 { 134 u16 idx = txq->sw_tx_prod; 135 struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; 136 struct eth_tx_bd *tx_data_bd; 137 int i, split_bd_len = 0; 138 139 /* Return prod to its position before this skb was handled */ 140 qed_chain_set_prod(&txq->tx_pbl, 141 le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); 142 143 first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl); 144 145 if (data_split) { 146 struct eth_tx_bd *split = (struct eth_tx_bd *) 147 qed_chain_produce(&txq->tx_pbl); 148 split_bd_len = BD_UNMAP_LEN(split); 149 nbd--; 150 } 151 152 dma_unmap_single(txq->dev, BD_UNMAP_ADDR(first_bd), 153 BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); 154 155 /* Unmap the data of the skb frags */ 156 for (i = 0; i < nbd; i++) { 157 tx_data_bd = (struct eth_tx_bd *) 158 qed_chain_produce(&txq->tx_pbl); 159 if (tx_data_bd->nbytes) 160 dma_unmap_page(txq->dev, 161 BD_UNMAP_ADDR(tx_data_bd), 162 BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); 163 } 164 165 /* Return again prod to its position before this skb was handled */ 166 qed_chain_set_prod(&txq->tx_pbl, 167 le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); 168 169 /* Free skb */ 170 dev_kfree_skb_any(skb); 171 txq->sw_tx_ring.skbs[idx].skb = NULL; 172 txq->sw_tx_ring.skbs[idx].flags = 0; 173 } 174 175 static u32 qede_xmit_type(struct sk_buff *skb, int *ipv6_ext) 176 { 177 u32 rc = XMIT_L4_CSUM; 178 __be16 l3_proto; 179 180 if (skb->ip_summed != CHECKSUM_PARTIAL) 181 return XMIT_PLAIN; 182 183 l3_proto = vlan_get_protocol(skb); 184 if (l3_proto == htons(ETH_P_IPV6) && 185 (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) 186 *ipv6_ext = 1; 187 188 if (skb->encapsulation) { 189 rc |= XMIT_ENC; 190 if (skb_is_gso(skb)) { 191 unsigned short gso_type = skb_shinfo(skb)->gso_type; 192 193 if ((gso_type & SKB_GSO_UDP_TUNNEL_CSUM) || 194 (gso_type & SKB_GSO_GRE_CSUM)) 195 rc |= XMIT_ENC_GSO_L4_CSUM; 196 197 rc |= XMIT_LSO; 198 return rc; 199 } 200 } 201 202 if (skb_is_gso(skb)) 203 rc |= XMIT_LSO; 204 205 return rc; 206 } 207 208 static void qede_set_params_for_ipv6_ext(struct sk_buff *skb, 209 struct eth_tx_2nd_bd *second_bd, 210 struct eth_tx_3rd_bd *third_bd) 211 { 212 u8 l4_proto; 213 u16 bd2_bits1 = 0, bd2_bits2 = 0; 214 215 bd2_bits1 |= (1 << ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT); 216 217 bd2_bits2 |= ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) & 218 ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_MASK) 219 << ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_SHIFT; 220 221 bd2_bits1 |= (ETH_L4_PSEUDO_CSUM_CORRECT_LENGTH << 222 ETH_TX_DATA_2ND_BD_L4_PSEUDO_CSUM_MODE_SHIFT); 223 224 if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) 225 l4_proto = ipv6_hdr(skb)->nexthdr; 226 else 227 l4_proto = ip_hdr(skb)->protocol; 228 229 if (l4_proto == IPPROTO_UDP) 230 bd2_bits1 |= 1 << ETH_TX_DATA_2ND_BD_L4_UDP_SHIFT; 231 232 if (third_bd) 233 third_bd->data.bitfields |= 234 cpu_to_le16(((tcp_hdrlen(skb) / 4) & 235 ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_MASK) << 236 ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_SHIFT); 237 238 second_bd->data.bitfields1 = cpu_to_le16(bd2_bits1); 239 second_bd->data.bitfields2 = cpu_to_le16(bd2_bits2); 240 } 241 242 static int map_frag_to_bd(struct qede_tx_queue *txq, 243 skb_frag_t *frag, struct eth_tx_bd *bd) 244 { 245 dma_addr_t mapping; 246 247 /* Map skb non-linear frag data for DMA */ 248 mapping = skb_frag_dma_map(txq->dev, frag, 0, 249 skb_frag_size(frag), DMA_TO_DEVICE); 250 if (unlikely(dma_mapping_error(txq->dev, mapping))) 251 return -ENOMEM; 252 253 /* Setup the data pointer of the frag data */ 254 BD_SET_UNMAP_ADDR_LEN(bd, mapping, skb_frag_size(frag)); 255 256 return 0; 257 } 258 259 static u16 qede_get_skb_hlen(struct sk_buff *skb, bool is_encap_pkt) 260 { 261 if (is_encap_pkt) 262 return (skb_inner_transport_header(skb) + 263 inner_tcp_hdrlen(skb) - skb->data); 264 else 265 return (skb_transport_header(skb) + 266 tcp_hdrlen(skb) - skb->data); 267 } 268 269 /* +2 for 1st BD for headers and 2nd BD for headlen (if required) */ 270 #if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) 271 static bool qede_pkt_req_lin(struct sk_buff *skb, u8 xmit_type) 272 { 273 int allowed_frags = ETH_TX_MAX_BDS_PER_NON_LSO_PACKET - 1; 274 275 if (xmit_type & XMIT_LSO) { 276 int hlen; 277 278 hlen = qede_get_skb_hlen(skb, xmit_type & XMIT_ENC); 279 280 /* linear payload would require its own BD */ 281 if (skb_headlen(skb) > hlen) 282 allowed_frags--; 283 } 284 285 return (skb_shinfo(skb)->nr_frags > allowed_frags); 286 } 287 #endif 288 289 static inline void qede_update_tx_producer(struct qede_tx_queue *txq) 290 { 291 /* wmb makes sure that the BDs data is updated before updating the 292 * producer, otherwise FW may read old data from the BDs. 293 */ 294 wmb(); 295 barrier(); 296 writel(txq->tx_db.raw, txq->doorbell_addr); 297 298 /* Fence required to flush the write combined buffer, since another 299 * CPU may write to the same doorbell address and data may be lost 300 * due to relaxed order nature of write combined bar. 301 */ 302 wmb(); 303 } 304 305 static int qede_xdp_xmit(struct qede_tx_queue *txq, dma_addr_t dma, u16 pad, 306 u16 len, struct page *page, struct xdp_frame *xdpf) 307 { 308 struct eth_tx_1st_bd *bd; 309 struct sw_tx_xdp *xdp; 310 u16 val; 311 312 if (unlikely(qed_chain_get_elem_used(&txq->tx_pbl) >= 313 txq->num_tx_buffers)) { 314 txq->stopped_cnt++; 315 return -ENOMEM; 316 } 317 318 bd = qed_chain_produce(&txq->tx_pbl); 319 bd->data.nbds = 1; 320 bd->data.bd_flags.bitfields = BIT(ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT); 321 322 val = (len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << 323 ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT; 324 325 bd->data.bitfields = cpu_to_le16(val); 326 327 /* We can safely ignore the offset, as it's 0 for XDP */ 328 BD_SET_UNMAP_ADDR_LEN(bd, dma + pad, len); 329 330 xdp = txq->sw_tx_ring.xdp + txq->sw_tx_prod; 331 xdp->mapping = dma; 332 xdp->page = page; 333 xdp->xdpf = xdpf; 334 335 txq->sw_tx_prod = (txq->sw_tx_prod + 1) % txq->num_tx_buffers; 336 337 return 0; 338 } 339 340 int qede_xdp_transmit(struct net_device *dev, int n_frames, 341 struct xdp_frame **frames, u32 flags) 342 { 343 struct qede_dev *edev = netdev_priv(dev); 344 struct device *dmadev = &edev->pdev->dev; 345 struct qede_tx_queue *xdp_tx; 346 struct xdp_frame *xdpf; 347 dma_addr_t mapping; 348 int i, nxmit = 0; 349 u16 xdp_prod; 350 351 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 352 return -EINVAL; 353 354 if (unlikely(!netif_running(dev))) 355 return -ENETDOWN; 356 357 i = smp_processor_id() % edev->total_xdp_queues; 358 xdp_tx = edev->fp_array[i].xdp_tx; 359 360 spin_lock(&xdp_tx->xdp_tx_lock); 361 362 for (i = 0; i < n_frames; i++) { 363 xdpf = frames[i]; 364 365 mapping = dma_map_single(dmadev, xdpf->data, xdpf->len, 366 DMA_TO_DEVICE); 367 if (unlikely(dma_mapping_error(dmadev, mapping))) 368 break; 369 370 if (unlikely(qede_xdp_xmit(xdp_tx, mapping, 0, xdpf->len, 371 NULL, xdpf))) 372 break; 373 nxmit++; 374 } 375 376 if (flags & XDP_XMIT_FLUSH) { 377 xdp_prod = qed_chain_get_prod_idx(&xdp_tx->tx_pbl); 378 379 xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); 380 qede_update_tx_producer(xdp_tx); 381 } 382 383 spin_unlock(&xdp_tx->xdp_tx_lock); 384 385 return nxmit; 386 } 387 388 int qede_txq_has_work(struct qede_tx_queue *txq) 389 { 390 u16 hw_bd_cons; 391 392 /* Tell compiler that consumer and producer can change */ 393 barrier(); 394 hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); 395 if (qed_chain_get_cons_idx(&txq->tx_pbl) == hw_bd_cons + 1) 396 return 0; 397 398 return hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl); 399 } 400 401 static void qede_xdp_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) 402 { 403 struct sw_tx_xdp *xdp_info, *xdp_arr = txq->sw_tx_ring.xdp; 404 struct device *dev = &edev->pdev->dev; 405 struct xdp_frame *xdpf; 406 u16 hw_bd_cons; 407 408 hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); 409 barrier(); 410 411 while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { 412 xdp_info = xdp_arr + txq->sw_tx_cons; 413 xdpf = xdp_info->xdpf; 414 415 if (xdpf) { 416 dma_unmap_single(dev, xdp_info->mapping, xdpf->len, 417 DMA_TO_DEVICE); 418 xdp_return_frame(xdpf); 419 420 xdp_info->xdpf = NULL; 421 } else { 422 dma_unmap_page(dev, xdp_info->mapping, PAGE_SIZE, 423 DMA_BIDIRECTIONAL); 424 __free_page(xdp_info->page); 425 } 426 427 qed_chain_consume(&txq->tx_pbl); 428 txq->sw_tx_cons = (txq->sw_tx_cons + 1) % txq->num_tx_buffers; 429 txq->xmit_pkts++; 430 } 431 } 432 433 static int qede_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) 434 { 435 unsigned int pkts_compl = 0, bytes_compl = 0; 436 struct netdev_queue *netdev_txq; 437 u16 hw_bd_cons; 438 int rc; 439 440 netdev_txq = netdev_get_tx_queue(edev->ndev, txq->ndev_txq_id); 441 442 hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); 443 barrier(); 444 445 while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { 446 int len = 0; 447 448 rc = qede_free_tx_pkt(edev, txq, &len); 449 if (rc) { 450 DP_NOTICE(edev, "hw_bd_cons = %d, chain_cons=%d\n", 451 hw_bd_cons, 452 qed_chain_get_cons_idx(&txq->tx_pbl)); 453 break; 454 } 455 456 bytes_compl += len; 457 pkts_compl++; 458 txq->sw_tx_cons = (txq->sw_tx_cons + 1) % txq->num_tx_buffers; 459 txq->xmit_pkts++; 460 } 461 462 netdev_tx_completed_queue(netdev_txq, pkts_compl, bytes_compl); 463 464 /* Need to make the tx_bd_cons update visible to start_xmit() 465 * before checking for netif_tx_queue_stopped(). Without the 466 * memory barrier, there is a small possibility that 467 * start_xmit() will miss it and cause the queue to be stopped 468 * forever. 469 * On the other hand we need an rmb() here to ensure the proper 470 * ordering of bit testing in the following 471 * netif_tx_queue_stopped(txq) call. 472 */ 473 smp_mb(); 474 475 if (unlikely(netif_tx_queue_stopped(netdev_txq))) { 476 /* Taking tx_lock is needed to prevent reenabling the queue 477 * while it's empty. This could have happen if rx_action() gets 478 * suspended in qede_tx_int() after the condition before 479 * netif_tx_wake_queue(), while tx_action (qede_start_xmit()): 480 * 481 * stops the queue->sees fresh tx_bd_cons->releases the queue-> 482 * sends some packets consuming the whole queue again-> 483 * stops the queue 484 */ 485 486 __netif_tx_lock(netdev_txq, smp_processor_id()); 487 488 if ((netif_tx_queue_stopped(netdev_txq)) && 489 (edev->state == QEDE_STATE_OPEN) && 490 (qed_chain_get_elem_left(&txq->tx_pbl) 491 >= (MAX_SKB_FRAGS + 1))) { 492 netif_tx_wake_queue(netdev_txq); 493 DP_VERBOSE(edev, NETIF_MSG_TX_DONE, 494 "Wake queue was called\n"); 495 } 496 497 __netif_tx_unlock(netdev_txq); 498 } 499 500 return 0; 501 } 502 503 bool qede_has_rx_work(struct qede_rx_queue *rxq) 504 { 505 u16 hw_comp_cons, sw_comp_cons; 506 507 /* Tell compiler that status block fields can change */ 508 barrier(); 509 510 hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); 511 sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); 512 513 return hw_comp_cons != sw_comp_cons; 514 } 515 516 static inline void qede_rx_bd_ring_consume(struct qede_rx_queue *rxq) 517 { 518 qed_chain_consume(&rxq->rx_bd_ring); 519 rxq->sw_rx_cons++; 520 } 521 522 /* This function reuses the buffer(from an offset) from 523 * consumer index to producer index in the bd ring 524 */ 525 static inline void qede_reuse_page(struct qede_rx_queue *rxq, 526 struct sw_rx_data *curr_cons) 527 { 528 struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring); 529 struct sw_rx_data *curr_prod; 530 dma_addr_t new_mapping; 531 532 curr_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; 533 *curr_prod = *curr_cons; 534 535 new_mapping = curr_prod->mapping + curr_prod->page_offset; 536 537 rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(new_mapping)); 538 rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(new_mapping) + 539 rxq->rx_headroom); 540 541 rxq->sw_rx_prod++; 542 curr_cons->data = NULL; 543 } 544 545 /* In case of allocation failures reuse buffers 546 * from consumer index to produce buffers for firmware 547 */ 548 void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq, u8 count) 549 { 550 struct sw_rx_data *curr_cons; 551 552 for (; count > 0; count--) { 553 curr_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; 554 qede_reuse_page(rxq, curr_cons); 555 qede_rx_bd_ring_consume(rxq); 556 } 557 } 558 559 static inline int qede_realloc_rx_buffer(struct qede_rx_queue *rxq, 560 struct sw_rx_data *curr_cons) 561 { 562 /* Move to the next segment in the page */ 563 curr_cons->page_offset += rxq->rx_buf_seg_size; 564 565 if (curr_cons->page_offset == PAGE_SIZE) { 566 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 567 /* Since we failed to allocate new buffer 568 * current buffer can be used again. 569 */ 570 curr_cons->page_offset -= rxq->rx_buf_seg_size; 571 572 return -ENOMEM; 573 } 574 575 dma_unmap_page(rxq->dev, curr_cons->mapping, 576 PAGE_SIZE, rxq->data_direction); 577 } else { 578 /* Increment refcount of the page as we don't want 579 * network stack to take the ownership of the page 580 * which can be recycled multiple times by the driver. 581 */ 582 page_ref_inc(curr_cons->data); 583 qede_reuse_page(rxq, curr_cons); 584 } 585 586 return 0; 587 } 588 589 void qede_update_rx_prod(struct qede_dev *edev, struct qede_rx_queue *rxq) 590 { 591 u16 bd_prod = qed_chain_get_prod_idx(&rxq->rx_bd_ring); 592 u16 cqe_prod = qed_chain_get_prod_idx(&rxq->rx_comp_ring); 593 struct eth_rx_prod_data rx_prods = {0}; 594 595 /* Update producers */ 596 rx_prods.bd_prod = cpu_to_le16(bd_prod); 597 rx_prods.cqe_prod = cpu_to_le16(cqe_prod); 598 599 /* Make sure that the BD and SGE data is updated before updating the 600 * producers since FW might read the BD/SGE right after the producer 601 * is updated. 602 */ 603 wmb(); 604 605 internal_ram_wr(rxq->hw_rxq_prod_addr, sizeof(rx_prods), 606 (u32 *)&rx_prods); 607 } 608 609 static void qede_get_rxhash(struct sk_buff *skb, u8 bitfields, __le32 rss_hash) 610 { 611 enum pkt_hash_types hash_type = PKT_HASH_TYPE_NONE; 612 enum rss_hash_type htype; 613 u32 hash = 0; 614 615 htype = GET_FIELD(bitfields, ETH_FAST_PATH_RX_REG_CQE_RSS_HASH_TYPE); 616 if (htype) { 617 hash_type = ((htype == RSS_HASH_TYPE_IPV4) || 618 (htype == RSS_HASH_TYPE_IPV6)) ? 619 PKT_HASH_TYPE_L3 : PKT_HASH_TYPE_L4; 620 hash = le32_to_cpu(rss_hash); 621 } 622 skb_set_hash(skb, hash, hash_type); 623 } 624 625 static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag) 626 { 627 skb_checksum_none_assert(skb); 628 629 if (csum_flag & QEDE_CSUM_UNNECESSARY) 630 skb->ip_summed = CHECKSUM_UNNECESSARY; 631 632 if (csum_flag & QEDE_TUNN_CSUM_UNNECESSARY) { 633 skb->csum_level = 1; 634 skb->encapsulation = 1; 635 } 636 } 637 638 static inline void qede_skb_receive(struct qede_dev *edev, 639 struct qede_fastpath *fp, 640 struct qede_rx_queue *rxq, 641 struct sk_buff *skb, u16 vlan_tag) 642 { 643 if (vlan_tag) 644 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag); 645 646 napi_gro_receive(&fp->napi, skb); 647 } 648 649 static void qede_set_gro_params(struct qede_dev *edev, 650 struct sk_buff *skb, 651 struct eth_fast_path_rx_tpa_start_cqe *cqe) 652 { 653 u16 parsing_flags = le16_to_cpu(cqe->pars_flags.flags); 654 655 if (((parsing_flags >> PARSING_AND_ERR_FLAGS_L3TYPE_SHIFT) & 656 PARSING_AND_ERR_FLAGS_L3TYPE_MASK) == 2) 657 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 658 else 659 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 660 661 skb_shinfo(skb)->gso_size = __le16_to_cpu(cqe->len_on_first_bd) - 662 cqe->header_len; 663 } 664 665 static int qede_fill_frag_skb(struct qede_dev *edev, 666 struct qede_rx_queue *rxq, 667 u8 tpa_agg_index, u16 len_on_bd) 668 { 669 struct sw_rx_data *current_bd = &rxq->sw_rx_ring[rxq->sw_rx_cons & 670 NUM_RX_BDS_MAX]; 671 struct qede_agg_info *tpa_info = &rxq->tpa_info[tpa_agg_index]; 672 struct sk_buff *skb = tpa_info->skb; 673 674 if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) 675 goto out; 676 677 /* Add one frag and update the appropriate fields in the skb */ 678 skb_fill_page_desc(skb, tpa_info->frag_id++, 679 current_bd->data, 680 current_bd->page_offset + rxq->rx_headroom, 681 len_on_bd); 682 683 if (unlikely(qede_realloc_rx_buffer(rxq, current_bd))) { 684 /* Incr page ref count to reuse on allocation failure 685 * so that it doesn't get freed while freeing SKB. 686 */ 687 page_ref_inc(current_bd->data); 688 goto out; 689 } 690 691 qede_rx_bd_ring_consume(rxq); 692 693 skb->data_len += len_on_bd; 694 skb->truesize += rxq->rx_buf_seg_size; 695 skb->len += len_on_bd; 696 697 return 0; 698 699 out: 700 tpa_info->state = QEDE_AGG_STATE_ERROR; 701 qede_recycle_rx_bd_ring(rxq, 1); 702 703 return -ENOMEM; 704 } 705 706 static bool qede_tunn_exist(u16 flag) 707 { 708 return !!(flag & (PARSING_AND_ERR_FLAGS_TUNNELEXIST_MASK << 709 PARSING_AND_ERR_FLAGS_TUNNELEXIST_SHIFT)); 710 } 711 712 static u8 qede_check_tunn_csum(u16 flag) 713 { 714 u16 csum_flag = 0; 715 u8 tcsum = 0; 716 717 if (flag & (PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_MASK << 718 PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_SHIFT)) 719 csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_MASK << 720 PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_SHIFT; 721 722 if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << 723 PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { 724 csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << 725 PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; 726 tcsum = QEDE_TUNN_CSUM_UNNECESSARY; 727 } 728 729 csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_MASK << 730 PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_SHIFT | 731 PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << 732 PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; 733 734 if (csum_flag & flag) 735 return QEDE_CSUM_ERROR; 736 737 return QEDE_CSUM_UNNECESSARY | tcsum; 738 } 739 740 static inline struct sk_buff * 741 qede_build_skb(struct qede_rx_queue *rxq, 742 struct sw_rx_data *bd, u16 len, u16 pad) 743 { 744 struct sk_buff *skb; 745 void *buf; 746 747 buf = page_address(bd->data) + bd->page_offset; 748 skb = build_skb(buf, rxq->rx_buf_seg_size); 749 750 skb_reserve(skb, pad); 751 skb_put(skb, len); 752 753 return skb; 754 } 755 756 static struct sk_buff * 757 qede_tpa_rx_build_skb(struct qede_dev *edev, 758 struct qede_rx_queue *rxq, 759 struct sw_rx_data *bd, u16 len, u16 pad, 760 bool alloc_skb) 761 { 762 struct sk_buff *skb; 763 764 skb = qede_build_skb(rxq, bd, len, pad); 765 bd->page_offset += rxq->rx_buf_seg_size; 766 767 if (bd->page_offset == PAGE_SIZE) { 768 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 769 DP_NOTICE(edev, 770 "Failed to allocate RX buffer for tpa start\n"); 771 bd->page_offset -= rxq->rx_buf_seg_size; 772 page_ref_inc(bd->data); 773 dev_kfree_skb_any(skb); 774 return NULL; 775 } 776 } else { 777 page_ref_inc(bd->data); 778 qede_reuse_page(rxq, bd); 779 } 780 781 /* We've consumed the first BD and prepared an SKB */ 782 qede_rx_bd_ring_consume(rxq); 783 784 return skb; 785 } 786 787 static struct sk_buff * 788 qede_rx_build_skb(struct qede_dev *edev, 789 struct qede_rx_queue *rxq, 790 struct sw_rx_data *bd, u16 len, u16 pad) 791 { 792 struct sk_buff *skb = NULL; 793 794 /* For smaller frames still need to allocate skb, memcpy 795 * data and benefit in reusing the page segment instead of 796 * un-mapping it. 797 */ 798 if ((len + pad <= edev->rx_copybreak)) { 799 unsigned int offset = bd->page_offset + pad; 800 801 skb = netdev_alloc_skb(edev->ndev, QEDE_RX_HDR_SIZE); 802 if (unlikely(!skb)) 803 return NULL; 804 805 skb_reserve(skb, pad); 806 skb_put_data(skb, page_address(bd->data) + offset, len); 807 qede_reuse_page(rxq, bd); 808 goto out; 809 } 810 811 skb = qede_build_skb(rxq, bd, len, pad); 812 813 if (unlikely(qede_realloc_rx_buffer(rxq, bd))) { 814 /* Incr page ref count to reuse on allocation failure so 815 * that it doesn't get freed while freeing SKB [as its 816 * already mapped there]. 817 */ 818 page_ref_inc(bd->data); 819 dev_kfree_skb_any(skb); 820 return NULL; 821 } 822 out: 823 /* We've consumed the first BD and prepared an SKB */ 824 qede_rx_bd_ring_consume(rxq); 825 826 return skb; 827 } 828 829 static void qede_tpa_start(struct qede_dev *edev, 830 struct qede_rx_queue *rxq, 831 struct eth_fast_path_rx_tpa_start_cqe *cqe) 832 { 833 struct qede_agg_info *tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; 834 struct sw_rx_data *sw_rx_data_cons; 835 u16 pad; 836 837 sw_rx_data_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; 838 pad = cqe->placement_offset + rxq->rx_headroom; 839 840 tpa_info->skb = qede_tpa_rx_build_skb(edev, rxq, sw_rx_data_cons, 841 le16_to_cpu(cqe->len_on_first_bd), 842 pad, false); 843 tpa_info->buffer.page_offset = sw_rx_data_cons->page_offset; 844 tpa_info->buffer.mapping = sw_rx_data_cons->mapping; 845 846 if (unlikely(!tpa_info->skb)) { 847 DP_NOTICE(edev, "Failed to allocate SKB for gro\n"); 848 849 /* Consume from ring but do not produce since 850 * this might be used by FW still, it will be re-used 851 * at TPA end. 852 */ 853 tpa_info->tpa_start_fail = true; 854 qede_rx_bd_ring_consume(rxq); 855 tpa_info->state = QEDE_AGG_STATE_ERROR; 856 goto cons_buf; 857 } 858 859 tpa_info->frag_id = 0; 860 tpa_info->state = QEDE_AGG_STATE_START; 861 862 if ((le16_to_cpu(cqe->pars_flags.flags) >> 863 PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT) & 864 PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK) 865 tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag); 866 else 867 tpa_info->vlan_tag = 0; 868 869 qede_get_rxhash(tpa_info->skb, cqe->bitfields, cqe->rss_hash); 870 871 /* This is needed in order to enable forwarding support */ 872 qede_set_gro_params(edev, tpa_info->skb, cqe); 873 874 cons_buf: /* We still need to handle bd_len_list to consume buffers */ 875 if (likely(cqe->bw_ext_bd_len_list[0])) 876 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, 877 le16_to_cpu(cqe->bw_ext_bd_len_list[0])); 878 879 if (unlikely(cqe->bw_ext_bd_len_list[1])) { 880 DP_ERR(edev, 881 "Unlikely - got a TPA aggregation with more than one bw_ext_bd_len_list entry in the TPA start\n"); 882 tpa_info->state = QEDE_AGG_STATE_ERROR; 883 } 884 } 885 886 #ifdef CONFIG_INET 887 static void qede_gro_ip_csum(struct sk_buff *skb) 888 { 889 const struct iphdr *iph = ip_hdr(skb); 890 struct tcphdr *th; 891 892 skb_set_transport_header(skb, sizeof(struct iphdr)); 893 th = tcp_hdr(skb); 894 895 th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb), 896 iph->saddr, iph->daddr, 0); 897 898 tcp_gro_complete(skb); 899 } 900 901 static void qede_gro_ipv6_csum(struct sk_buff *skb) 902 { 903 struct ipv6hdr *iph = ipv6_hdr(skb); 904 struct tcphdr *th; 905 906 skb_set_transport_header(skb, sizeof(struct ipv6hdr)); 907 th = tcp_hdr(skb); 908 909 th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb), 910 &iph->saddr, &iph->daddr, 0); 911 tcp_gro_complete(skb); 912 } 913 #endif 914 915 static void qede_gro_receive(struct qede_dev *edev, 916 struct qede_fastpath *fp, 917 struct sk_buff *skb, 918 u16 vlan_tag) 919 { 920 /* FW can send a single MTU sized packet from gro flow 921 * due to aggregation timeout/last segment etc. which 922 * is not expected to be a gro packet. If a skb has zero 923 * frags then simply push it in the stack as non gso skb. 924 */ 925 if (unlikely(!skb->data_len)) { 926 skb_shinfo(skb)->gso_type = 0; 927 skb_shinfo(skb)->gso_size = 0; 928 goto send_skb; 929 } 930 931 #ifdef CONFIG_INET 932 if (skb_shinfo(skb)->gso_size) { 933 skb_reset_network_header(skb); 934 935 switch (skb->protocol) { 936 case htons(ETH_P_IP): 937 qede_gro_ip_csum(skb); 938 break; 939 case htons(ETH_P_IPV6): 940 qede_gro_ipv6_csum(skb); 941 break; 942 default: 943 DP_ERR(edev, 944 "Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n", 945 ntohs(skb->protocol)); 946 } 947 } 948 #endif 949 950 send_skb: 951 skb_record_rx_queue(skb, fp->rxq->rxq_id); 952 qede_skb_receive(edev, fp, fp->rxq, skb, vlan_tag); 953 } 954 955 static inline void qede_tpa_cont(struct qede_dev *edev, 956 struct qede_rx_queue *rxq, 957 struct eth_fast_path_rx_tpa_cont_cqe *cqe) 958 { 959 int i; 960 961 for (i = 0; cqe->len_list[i]; i++) 962 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, 963 le16_to_cpu(cqe->len_list[i])); 964 965 if (unlikely(i > 1)) 966 DP_ERR(edev, 967 "Strange - TPA cont with more than a single len_list entry\n"); 968 } 969 970 static int qede_tpa_end(struct qede_dev *edev, 971 struct qede_fastpath *fp, 972 struct eth_fast_path_rx_tpa_end_cqe *cqe) 973 { 974 struct qede_rx_queue *rxq = fp->rxq; 975 struct qede_agg_info *tpa_info; 976 struct sk_buff *skb; 977 int i; 978 979 tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; 980 skb = tpa_info->skb; 981 982 if (tpa_info->buffer.page_offset == PAGE_SIZE) 983 dma_unmap_page(rxq->dev, tpa_info->buffer.mapping, 984 PAGE_SIZE, rxq->data_direction); 985 986 for (i = 0; cqe->len_list[i]; i++) 987 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, 988 le16_to_cpu(cqe->len_list[i])); 989 if (unlikely(i > 1)) 990 DP_ERR(edev, 991 "Strange - TPA emd with more than a single len_list entry\n"); 992 993 if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) 994 goto err; 995 996 /* Sanity */ 997 if (unlikely(cqe->num_of_bds != tpa_info->frag_id + 1)) 998 DP_ERR(edev, 999 "Strange - TPA had %02x BDs, but SKB has only %d frags\n", 1000 cqe->num_of_bds, tpa_info->frag_id); 1001 if (unlikely(skb->len != le16_to_cpu(cqe->total_packet_len))) 1002 DP_ERR(edev, 1003 "Strange - total packet len [cqe] is %4x but SKB has len %04x\n", 1004 le16_to_cpu(cqe->total_packet_len), skb->len); 1005 1006 /* Finalize the SKB */ 1007 skb->protocol = eth_type_trans(skb, edev->ndev); 1008 skb->ip_summed = CHECKSUM_UNNECESSARY; 1009 1010 /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count 1011 * to skb_shinfo(skb)->gso_segs 1012 */ 1013 NAPI_GRO_CB(skb)->count = le16_to_cpu(cqe->num_of_coalesced_segs); 1014 1015 qede_gro_receive(edev, fp, skb, tpa_info->vlan_tag); 1016 1017 tpa_info->state = QEDE_AGG_STATE_NONE; 1018 1019 return 1; 1020 err: 1021 tpa_info->state = QEDE_AGG_STATE_NONE; 1022 1023 if (tpa_info->tpa_start_fail) { 1024 qede_reuse_page(rxq, &tpa_info->buffer); 1025 tpa_info->tpa_start_fail = false; 1026 } 1027 1028 dev_kfree_skb_any(tpa_info->skb); 1029 tpa_info->skb = NULL; 1030 return 0; 1031 } 1032 1033 static u8 qede_check_notunn_csum(u16 flag) 1034 { 1035 u16 csum_flag = 0; 1036 u8 csum = 0; 1037 1038 if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << 1039 PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { 1040 csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << 1041 PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; 1042 csum = QEDE_CSUM_UNNECESSARY; 1043 } 1044 1045 csum_flag |= PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << 1046 PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; 1047 1048 if (csum_flag & flag) 1049 return QEDE_CSUM_ERROR; 1050 1051 return csum; 1052 } 1053 1054 static u8 qede_check_csum(u16 flag) 1055 { 1056 if (!qede_tunn_exist(flag)) 1057 return qede_check_notunn_csum(flag); 1058 else 1059 return qede_check_tunn_csum(flag); 1060 } 1061 1062 static bool qede_pkt_is_ip_fragmented(struct eth_fast_path_rx_reg_cqe *cqe, 1063 u16 flag) 1064 { 1065 u8 tun_pars_flg = cqe->tunnel_pars_flags.flags; 1066 1067 if ((tun_pars_flg & (ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_MASK << 1068 ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_SHIFT)) || 1069 (flag & (PARSING_AND_ERR_FLAGS_IPV4FRAG_MASK << 1070 PARSING_AND_ERR_FLAGS_IPV4FRAG_SHIFT))) 1071 return true; 1072 1073 return false; 1074 } 1075 1076 /* Return true iff packet is to be passed to stack */ 1077 static bool qede_rx_xdp(struct qede_dev *edev, 1078 struct qede_fastpath *fp, 1079 struct qede_rx_queue *rxq, 1080 struct bpf_prog *prog, 1081 struct sw_rx_data *bd, 1082 struct eth_fast_path_rx_reg_cqe *cqe, 1083 u16 *data_offset, u16 *len) 1084 { 1085 struct xdp_buff xdp; 1086 enum xdp_action act; 1087 1088 xdp_init_buff(&xdp, rxq->rx_buf_seg_size, &rxq->xdp_rxq); 1089 xdp_prepare_buff(&xdp, page_address(bd->data), *data_offset, 1090 *len, false); 1091 1092 /* Queues always have a full reset currently, so for the time 1093 * being until there's atomic program replace just mark read 1094 * side for map helpers. 1095 */ 1096 rcu_read_lock(); 1097 act = bpf_prog_run_xdp(prog, &xdp); 1098 rcu_read_unlock(); 1099 1100 /* Recalculate, as XDP might have changed the headers */ 1101 *data_offset = xdp.data - xdp.data_hard_start; 1102 *len = xdp.data_end - xdp.data; 1103 1104 if (act == XDP_PASS) 1105 return true; 1106 1107 /* Count number of packets not to be passed to stack */ 1108 rxq->xdp_no_pass++; 1109 1110 switch (act) { 1111 case XDP_TX: 1112 /* We need the replacement buffer before transmit. */ 1113 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 1114 qede_recycle_rx_bd_ring(rxq, 1); 1115 1116 trace_xdp_exception(edev->ndev, prog, act); 1117 break; 1118 } 1119 1120 /* Now if there's a transmission problem, we'd still have to 1121 * throw current buffer, as replacement was already allocated. 1122 */ 1123 if (unlikely(qede_xdp_xmit(fp->xdp_tx, bd->mapping, 1124 *data_offset, *len, bd->data, 1125 NULL))) { 1126 dma_unmap_page(rxq->dev, bd->mapping, PAGE_SIZE, 1127 rxq->data_direction); 1128 __free_page(bd->data); 1129 1130 trace_xdp_exception(edev->ndev, prog, act); 1131 } else { 1132 dma_sync_single_for_device(rxq->dev, 1133 bd->mapping + *data_offset, 1134 *len, rxq->data_direction); 1135 fp->xdp_xmit |= QEDE_XDP_TX; 1136 } 1137 1138 /* Regardless, we've consumed an Rx BD */ 1139 qede_rx_bd_ring_consume(rxq); 1140 break; 1141 case XDP_REDIRECT: 1142 /* We need the replacement buffer before transmit. */ 1143 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 1144 qede_recycle_rx_bd_ring(rxq, 1); 1145 1146 trace_xdp_exception(edev->ndev, prog, act); 1147 break; 1148 } 1149 1150 dma_unmap_page(rxq->dev, bd->mapping, PAGE_SIZE, 1151 rxq->data_direction); 1152 1153 if (unlikely(xdp_do_redirect(edev->ndev, &xdp, prog))) 1154 DP_NOTICE(edev, "Failed to redirect the packet\n"); 1155 else 1156 fp->xdp_xmit |= QEDE_XDP_REDIRECT; 1157 1158 qede_rx_bd_ring_consume(rxq); 1159 break; 1160 default: 1161 bpf_warn_invalid_xdp_action(act); 1162 fallthrough; 1163 case XDP_ABORTED: 1164 trace_xdp_exception(edev->ndev, prog, act); 1165 fallthrough; 1166 case XDP_DROP: 1167 qede_recycle_rx_bd_ring(rxq, cqe->bd_num); 1168 } 1169 1170 return false; 1171 } 1172 1173 static int qede_rx_build_jumbo(struct qede_dev *edev, 1174 struct qede_rx_queue *rxq, 1175 struct sk_buff *skb, 1176 struct eth_fast_path_rx_reg_cqe *cqe, 1177 u16 first_bd_len) 1178 { 1179 u16 pkt_len = le16_to_cpu(cqe->pkt_len); 1180 struct sw_rx_data *bd; 1181 u16 bd_cons_idx; 1182 u8 num_frags; 1183 1184 pkt_len -= first_bd_len; 1185 1186 /* We've already used one BD for the SKB. Now take care of the rest */ 1187 for (num_frags = cqe->bd_num - 1; num_frags > 0; num_frags--) { 1188 u16 cur_size = pkt_len > rxq->rx_buf_size ? rxq->rx_buf_size : 1189 pkt_len; 1190 1191 if (unlikely(!cur_size)) { 1192 DP_ERR(edev, 1193 "Still got %d BDs for mapping jumbo, but length became 0\n", 1194 num_frags); 1195 goto out; 1196 } 1197 1198 /* We need a replacement buffer for each BD */ 1199 if (unlikely(qede_alloc_rx_buffer(rxq, true))) 1200 goto out; 1201 1202 /* Now that we've allocated the replacement buffer, 1203 * we can safely consume the next BD and map it to the SKB. 1204 */ 1205 bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; 1206 bd = &rxq->sw_rx_ring[bd_cons_idx]; 1207 qede_rx_bd_ring_consume(rxq); 1208 1209 dma_unmap_page(rxq->dev, bd->mapping, 1210 PAGE_SIZE, DMA_FROM_DEVICE); 1211 1212 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, bd->data, 1213 rxq->rx_headroom, cur_size, PAGE_SIZE); 1214 1215 pkt_len -= cur_size; 1216 } 1217 1218 if (unlikely(pkt_len)) 1219 DP_ERR(edev, 1220 "Mapped all BDs of jumbo, but still have %d bytes\n", 1221 pkt_len); 1222 1223 out: 1224 return num_frags; 1225 } 1226 1227 static int qede_rx_process_tpa_cqe(struct qede_dev *edev, 1228 struct qede_fastpath *fp, 1229 struct qede_rx_queue *rxq, 1230 union eth_rx_cqe *cqe, 1231 enum eth_rx_cqe_type type) 1232 { 1233 switch (type) { 1234 case ETH_RX_CQE_TYPE_TPA_START: 1235 qede_tpa_start(edev, rxq, &cqe->fast_path_tpa_start); 1236 return 0; 1237 case ETH_RX_CQE_TYPE_TPA_CONT: 1238 qede_tpa_cont(edev, rxq, &cqe->fast_path_tpa_cont); 1239 return 0; 1240 case ETH_RX_CQE_TYPE_TPA_END: 1241 return qede_tpa_end(edev, fp, &cqe->fast_path_tpa_end); 1242 default: 1243 return 0; 1244 } 1245 } 1246 1247 static int qede_rx_process_cqe(struct qede_dev *edev, 1248 struct qede_fastpath *fp, 1249 struct qede_rx_queue *rxq) 1250 { 1251 struct bpf_prog *xdp_prog = READ_ONCE(rxq->xdp_prog); 1252 struct eth_fast_path_rx_reg_cqe *fp_cqe; 1253 u16 len, pad, bd_cons_idx, parse_flag; 1254 enum eth_rx_cqe_type cqe_type; 1255 union eth_rx_cqe *cqe; 1256 struct sw_rx_data *bd; 1257 struct sk_buff *skb; 1258 __le16 flags; 1259 u8 csum_flag; 1260 1261 /* Get the CQE from the completion ring */ 1262 cqe = (union eth_rx_cqe *)qed_chain_consume(&rxq->rx_comp_ring); 1263 cqe_type = cqe->fast_path_regular.type; 1264 1265 /* Process an unlikely slowpath event */ 1266 if (unlikely(cqe_type == ETH_RX_CQE_TYPE_SLOW_PATH)) { 1267 struct eth_slow_path_rx_cqe *sp_cqe; 1268 1269 sp_cqe = (struct eth_slow_path_rx_cqe *)cqe; 1270 edev->ops->eth_cqe_completion(edev->cdev, fp->id, sp_cqe); 1271 return 0; 1272 } 1273 1274 /* Handle TPA cqes */ 1275 if (cqe_type != ETH_RX_CQE_TYPE_REGULAR) 1276 return qede_rx_process_tpa_cqe(edev, fp, rxq, cqe, cqe_type); 1277 1278 /* Get the data from the SW ring; Consume it only after it's evident 1279 * we wouldn't recycle it. 1280 */ 1281 bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; 1282 bd = &rxq->sw_rx_ring[bd_cons_idx]; 1283 1284 fp_cqe = &cqe->fast_path_regular; 1285 len = le16_to_cpu(fp_cqe->len_on_first_bd); 1286 pad = fp_cqe->placement_offset + rxq->rx_headroom; 1287 1288 /* Run eBPF program if one is attached */ 1289 if (xdp_prog) 1290 if (!qede_rx_xdp(edev, fp, rxq, xdp_prog, bd, fp_cqe, 1291 &pad, &len)) 1292 return 0; 1293 1294 /* If this is an error packet then drop it */ 1295 flags = cqe->fast_path_regular.pars_flags.flags; 1296 parse_flag = le16_to_cpu(flags); 1297 1298 csum_flag = qede_check_csum(parse_flag); 1299 if (unlikely(csum_flag == QEDE_CSUM_ERROR)) { 1300 if (qede_pkt_is_ip_fragmented(fp_cqe, parse_flag)) 1301 rxq->rx_ip_frags++; 1302 else 1303 rxq->rx_hw_errors++; 1304 } 1305 1306 /* Basic validation passed; Need to prepare an SKB. This would also 1307 * guarantee to finally consume the first BD upon success. 1308 */ 1309 skb = qede_rx_build_skb(edev, rxq, bd, len, pad); 1310 if (!skb) { 1311 rxq->rx_alloc_errors++; 1312 qede_recycle_rx_bd_ring(rxq, fp_cqe->bd_num); 1313 return 0; 1314 } 1315 1316 /* In case of Jumbo packet, several PAGE_SIZEd buffers will be pointed 1317 * by a single cqe. 1318 */ 1319 if (fp_cqe->bd_num > 1) { 1320 u16 unmapped_frags = qede_rx_build_jumbo(edev, rxq, skb, 1321 fp_cqe, len); 1322 1323 if (unlikely(unmapped_frags > 0)) { 1324 qede_recycle_rx_bd_ring(rxq, unmapped_frags); 1325 dev_kfree_skb_any(skb); 1326 return 0; 1327 } 1328 } 1329 1330 /* The SKB contains all the data. Now prepare meta-magic */ 1331 skb->protocol = eth_type_trans(skb, edev->ndev); 1332 qede_get_rxhash(skb, fp_cqe->bitfields, fp_cqe->rss_hash); 1333 qede_set_skb_csum(skb, csum_flag); 1334 skb_record_rx_queue(skb, rxq->rxq_id); 1335 qede_ptp_record_rx_ts(edev, cqe, skb); 1336 1337 /* SKB is prepared - pass it to stack */ 1338 qede_skb_receive(edev, fp, rxq, skb, le16_to_cpu(fp_cqe->vlan_tag)); 1339 1340 return 1; 1341 } 1342 1343 static int qede_rx_int(struct qede_fastpath *fp, int budget) 1344 { 1345 struct qede_rx_queue *rxq = fp->rxq; 1346 struct qede_dev *edev = fp->edev; 1347 int work_done = 0, rcv_pkts = 0; 1348 u16 hw_comp_cons, sw_comp_cons; 1349 1350 hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); 1351 sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); 1352 1353 /* Memory barrier to prevent the CPU from doing speculative reads of CQE 1354 * / BD in the while-loop before reading hw_comp_cons. If the CQE is 1355 * read before it is written by FW, then FW writes CQE and SB, and then 1356 * the CPU reads the hw_comp_cons, it will use an old CQE. 1357 */ 1358 rmb(); 1359 1360 /* Loop to complete all indicated BDs */ 1361 while ((sw_comp_cons != hw_comp_cons) && (work_done < budget)) { 1362 rcv_pkts += qede_rx_process_cqe(edev, fp, rxq); 1363 qed_chain_recycle_consumed(&rxq->rx_comp_ring); 1364 sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); 1365 work_done++; 1366 } 1367 1368 rxq->rcv_pkts += rcv_pkts; 1369 1370 /* Allocate replacement buffers */ 1371 while (rxq->num_rx_buffers - rxq->filled_buffers) 1372 if (qede_alloc_rx_buffer(rxq, false)) 1373 break; 1374 1375 /* Update producers */ 1376 qede_update_rx_prod(edev, rxq); 1377 1378 return work_done; 1379 } 1380 1381 static bool qede_poll_is_more_work(struct qede_fastpath *fp) 1382 { 1383 qed_sb_update_sb_idx(fp->sb_info); 1384 1385 /* *_has_*_work() reads the status block, thus we need to ensure that 1386 * status block indices have been actually read (qed_sb_update_sb_idx) 1387 * prior to this check (*_has_*_work) so that we won't write the 1388 * "newer" value of the status block to HW (if there was a DMA right 1389 * after qede_has_rx_work and if there is no rmb, the memory reading 1390 * (qed_sb_update_sb_idx) may be postponed to right before *_ack_sb). 1391 * In this case there will never be another interrupt until there is 1392 * another update of the status block, while there is still unhandled 1393 * work. 1394 */ 1395 rmb(); 1396 1397 if (likely(fp->type & QEDE_FASTPATH_RX)) 1398 if (qede_has_rx_work(fp->rxq)) 1399 return true; 1400 1401 if (fp->type & QEDE_FASTPATH_XDP) 1402 if (qede_txq_has_work(fp->xdp_tx)) 1403 return true; 1404 1405 if (likely(fp->type & QEDE_FASTPATH_TX)) { 1406 int cos; 1407 1408 for_each_cos_in_txq(fp->edev, cos) { 1409 if (qede_txq_has_work(&fp->txq[cos])) 1410 return true; 1411 } 1412 } 1413 1414 return false; 1415 } 1416 1417 /********************* 1418 * NDO & API related * 1419 *********************/ 1420 int qede_poll(struct napi_struct *napi, int budget) 1421 { 1422 struct qede_fastpath *fp = container_of(napi, struct qede_fastpath, 1423 napi); 1424 struct qede_dev *edev = fp->edev; 1425 int rx_work_done = 0; 1426 u16 xdp_prod; 1427 1428 fp->xdp_xmit = 0; 1429 1430 if (likely(fp->type & QEDE_FASTPATH_TX)) { 1431 int cos; 1432 1433 for_each_cos_in_txq(fp->edev, cos) { 1434 if (qede_txq_has_work(&fp->txq[cos])) 1435 qede_tx_int(edev, &fp->txq[cos]); 1436 } 1437 } 1438 1439 if ((fp->type & QEDE_FASTPATH_XDP) && qede_txq_has_work(fp->xdp_tx)) 1440 qede_xdp_tx_int(edev, fp->xdp_tx); 1441 1442 rx_work_done = (likely(fp->type & QEDE_FASTPATH_RX) && 1443 qede_has_rx_work(fp->rxq)) ? 1444 qede_rx_int(fp, budget) : 0; 1445 /* Handle case where we are called by netpoll with a budget of 0 */ 1446 if (rx_work_done < budget || !budget) { 1447 if (!qede_poll_is_more_work(fp)) { 1448 napi_complete_done(napi, rx_work_done); 1449 1450 /* Update and reenable interrupts */ 1451 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1); 1452 } else { 1453 rx_work_done = budget; 1454 } 1455 } 1456 1457 if (fp->xdp_xmit & QEDE_XDP_TX) { 1458 xdp_prod = qed_chain_get_prod_idx(&fp->xdp_tx->tx_pbl); 1459 1460 fp->xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); 1461 qede_update_tx_producer(fp->xdp_tx); 1462 } 1463 1464 if (fp->xdp_xmit & QEDE_XDP_REDIRECT) 1465 xdp_do_flush_map(); 1466 1467 return rx_work_done; 1468 } 1469 1470 irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie) 1471 { 1472 struct qede_fastpath *fp = fp_cookie; 1473 1474 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/); 1475 1476 napi_schedule_irqoff(&fp->napi); 1477 return IRQ_HANDLED; 1478 } 1479 1480 /* Main transmit function */ 1481 netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev) 1482 { 1483 struct qede_dev *edev = netdev_priv(ndev); 1484 struct netdev_queue *netdev_txq; 1485 struct qede_tx_queue *txq; 1486 struct eth_tx_1st_bd *first_bd; 1487 struct eth_tx_2nd_bd *second_bd = NULL; 1488 struct eth_tx_3rd_bd *third_bd = NULL; 1489 struct eth_tx_bd *tx_data_bd = NULL; 1490 u16 txq_index, val = 0; 1491 u8 nbd = 0; 1492 dma_addr_t mapping; 1493 int rc, frag_idx = 0, ipv6_ext = 0; 1494 u8 xmit_type; 1495 u16 idx; 1496 u16 hlen; 1497 bool data_split = false; 1498 1499 /* Get tx-queue context and netdev index */ 1500 txq_index = skb_get_queue_mapping(skb); 1501 WARN_ON(txq_index >= QEDE_TSS_COUNT(edev) * edev->dev_info.num_tc); 1502 txq = QEDE_NDEV_TXQ_ID_TO_TXQ(edev, txq_index); 1503 netdev_txq = netdev_get_tx_queue(ndev, txq_index); 1504 1505 WARN_ON(qed_chain_get_elem_left(&txq->tx_pbl) < (MAX_SKB_FRAGS + 1)); 1506 1507 xmit_type = qede_xmit_type(skb, &ipv6_ext); 1508 1509 #if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) 1510 if (qede_pkt_req_lin(skb, xmit_type)) { 1511 if (skb_linearize(skb)) { 1512 txq->tx_mem_alloc_err++; 1513 1514 dev_kfree_skb_any(skb); 1515 return NETDEV_TX_OK; 1516 } 1517 } 1518 #endif 1519 1520 /* Fill the entry in the SW ring and the BDs in the FW ring */ 1521 idx = txq->sw_tx_prod; 1522 txq->sw_tx_ring.skbs[idx].skb = skb; 1523 first_bd = (struct eth_tx_1st_bd *) 1524 qed_chain_produce(&txq->tx_pbl); 1525 memset(first_bd, 0, sizeof(*first_bd)); 1526 first_bd->data.bd_flags.bitfields = 1527 1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT; 1528 1529 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 1530 qede_ptp_tx_ts(edev, skb); 1531 1532 /* Map skb linear data for DMA and set in the first BD */ 1533 mapping = dma_map_single(txq->dev, skb->data, 1534 skb_headlen(skb), DMA_TO_DEVICE); 1535 if (unlikely(dma_mapping_error(txq->dev, mapping))) { 1536 DP_NOTICE(edev, "SKB mapping failed\n"); 1537 qede_free_failed_tx_pkt(txq, first_bd, 0, false); 1538 qede_update_tx_producer(txq); 1539 return NETDEV_TX_OK; 1540 } 1541 nbd++; 1542 BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb)); 1543 1544 /* In case there is IPv6 with extension headers or LSO we need 2nd and 1545 * 3rd BDs. 1546 */ 1547 if (unlikely((xmit_type & XMIT_LSO) | ipv6_ext)) { 1548 second_bd = (struct eth_tx_2nd_bd *) 1549 qed_chain_produce(&txq->tx_pbl); 1550 memset(second_bd, 0, sizeof(*second_bd)); 1551 1552 nbd++; 1553 third_bd = (struct eth_tx_3rd_bd *) 1554 qed_chain_produce(&txq->tx_pbl); 1555 memset(third_bd, 0, sizeof(*third_bd)); 1556 1557 nbd++; 1558 /* We need to fill in additional data in second_bd... */ 1559 tx_data_bd = (struct eth_tx_bd *)second_bd; 1560 } 1561 1562 if (skb_vlan_tag_present(skb)) { 1563 first_bd->data.vlan = cpu_to_le16(skb_vlan_tag_get(skb)); 1564 first_bd->data.bd_flags.bitfields |= 1565 1 << ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT; 1566 } 1567 1568 /* Fill the parsing flags & params according to the requested offload */ 1569 if (xmit_type & XMIT_L4_CSUM) { 1570 /* We don't re-calculate IP checksum as it is already done by 1571 * the upper stack 1572 */ 1573 first_bd->data.bd_flags.bitfields |= 1574 1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT; 1575 1576 if (xmit_type & XMIT_ENC) { 1577 first_bd->data.bd_flags.bitfields |= 1578 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; 1579 1580 val |= (1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT); 1581 } 1582 1583 /* Legacy FW had flipped behavior in regard to this bit - 1584 * I.e., needed to set to prevent FW from touching encapsulated 1585 * packets when it didn't need to. 1586 */ 1587 if (unlikely(txq->is_legacy)) 1588 val ^= (1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT); 1589 1590 /* If the packet is IPv6 with extension header, indicate that 1591 * to FW and pass few params, since the device cracker doesn't 1592 * support parsing IPv6 with extension header/s. 1593 */ 1594 if (unlikely(ipv6_ext)) 1595 qede_set_params_for_ipv6_ext(skb, second_bd, third_bd); 1596 } 1597 1598 if (xmit_type & XMIT_LSO) { 1599 first_bd->data.bd_flags.bitfields |= 1600 (1 << ETH_TX_1ST_BD_FLAGS_LSO_SHIFT); 1601 third_bd->data.lso_mss = 1602 cpu_to_le16(skb_shinfo(skb)->gso_size); 1603 1604 if (unlikely(xmit_type & XMIT_ENC)) { 1605 first_bd->data.bd_flags.bitfields |= 1606 1 << ETH_TX_1ST_BD_FLAGS_TUNN_IP_CSUM_SHIFT; 1607 1608 if (xmit_type & XMIT_ENC_GSO_L4_CSUM) { 1609 u8 tmp = ETH_TX_1ST_BD_FLAGS_TUNN_L4_CSUM_SHIFT; 1610 1611 first_bd->data.bd_flags.bitfields |= 1 << tmp; 1612 } 1613 hlen = qede_get_skb_hlen(skb, true); 1614 } else { 1615 first_bd->data.bd_flags.bitfields |= 1616 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; 1617 hlen = qede_get_skb_hlen(skb, false); 1618 } 1619 1620 /* @@@TBD - if will not be removed need to check */ 1621 third_bd->data.bitfields |= 1622 cpu_to_le16(1 << ETH_TX_DATA_3RD_BD_HDR_NBD_SHIFT); 1623 1624 /* Make life easier for FW guys who can't deal with header and 1625 * data on same BD. If we need to split, use the second bd... 1626 */ 1627 if (unlikely(skb_headlen(skb) > hlen)) { 1628 DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, 1629 "TSO split header size is %d (%x:%x)\n", 1630 first_bd->nbytes, first_bd->addr.hi, 1631 first_bd->addr.lo); 1632 1633 mapping = HILO_U64(le32_to_cpu(first_bd->addr.hi), 1634 le32_to_cpu(first_bd->addr.lo)) + 1635 hlen; 1636 1637 BD_SET_UNMAP_ADDR_LEN(tx_data_bd, mapping, 1638 le16_to_cpu(first_bd->nbytes) - 1639 hlen); 1640 1641 /* this marks the BD as one that has no 1642 * individual mapping 1643 */ 1644 txq->sw_tx_ring.skbs[idx].flags |= QEDE_TSO_SPLIT_BD; 1645 1646 first_bd->nbytes = cpu_to_le16(hlen); 1647 1648 tx_data_bd = (struct eth_tx_bd *)third_bd; 1649 data_split = true; 1650 } 1651 } else { 1652 val |= ((skb->len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << 1653 ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT); 1654 } 1655 1656 first_bd->data.bitfields = cpu_to_le16(val); 1657 1658 /* Handle fragmented skb */ 1659 /* special handle for frags inside 2nd and 3rd bds.. */ 1660 while (tx_data_bd && frag_idx < skb_shinfo(skb)->nr_frags) { 1661 rc = map_frag_to_bd(txq, 1662 &skb_shinfo(skb)->frags[frag_idx], 1663 tx_data_bd); 1664 if (rc) { 1665 qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); 1666 qede_update_tx_producer(txq); 1667 return NETDEV_TX_OK; 1668 } 1669 1670 if (tx_data_bd == (struct eth_tx_bd *)second_bd) 1671 tx_data_bd = (struct eth_tx_bd *)third_bd; 1672 else 1673 tx_data_bd = NULL; 1674 1675 frag_idx++; 1676 } 1677 1678 /* map last frags into 4th, 5th .... */ 1679 for (; frag_idx < skb_shinfo(skb)->nr_frags; frag_idx++, nbd++) { 1680 tx_data_bd = (struct eth_tx_bd *) 1681 qed_chain_produce(&txq->tx_pbl); 1682 1683 memset(tx_data_bd, 0, sizeof(*tx_data_bd)); 1684 1685 rc = map_frag_to_bd(txq, 1686 &skb_shinfo(skb)->frags[frag_idx], 1687 tx_data_bd); 1688 if (rc) { 1689 qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); 1690 qede_update_tx_producer(txq); 1691 return NETDEV_TX_OK; 1692 } 1693 } 1694 1695 /* update the first BD with the actual num BDs */ 1696 first_bd->data.nbds = nbd; 1697 1698 netdev_tx_sent_queue(netdev_txq, skb->len); 1699 1700 skb_tx_timestamp(skb); 1701 1702 /* Advance packet producer only before sending the packet since mapping 1703 * of pages may fail. 1704 */ 1705 txq->sw_tx_prod = (txq->sw_tx_prod + 1) % txq->num_tx_buffers; 1706 1707 /* 'next page' entries are counted in the producer value */ 1708 txq->tx_db.data.bd_prod = 1709 cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl)); 1710 1711 if (!netdev_xmit_more() || netif_xmit_stopped(netdev_txq)) 1712 qede_update_tx_producer(txq); 1713 1714 if (unlikely(qed_chain_get_elem_left(&txq->tx_pbl) 1715 < (MAX_SKB_FRAGS + 1))) { 1716 if (netdev_xmit_more()) 1717 qede_update_tx_producer(txq); 1718 1719 netif_tx_stop_queue(netdev_txq); 1720 txq->stopped_cnt++; 1721 DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, 1722 "Stop queue was called\n"); 1723 /* paired memory barrier is in qede_tx_int(), we have to keep 1724 * ordering of set_bit() in netif_tx_stop_queue() and read of 1725 * fp->bd_tx_cons 1726 */ 1727 smp_mb(); 1728 1729 if ((qed_chain_get_elem_left(&txq->tx_pbl) >= 1730 (MAX_SKB_FRAGS + 1)) && 1731 (edev->state == QEDE_STATE_OPEN)) { 1732 netif_tx_wake_queue(netdev_txq); 1733 DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, 1734 "Wake queue was called\n"); 1735 } 1736 } 1737 1738 return NETDEV_TX_OK; 1739 } 1740 1741 u16 qede_select_queue(struct net_device *dev, struct sk_buff *skb, 1742 struct net_device *sb_dev) 1743 { 1744 struct qede_dev *edev = netdev_priv(dev); 1745 int total_txq; 1746 1747 total_txq = QEDE_TSS_COUNT(edev) * edev->dev_info.num_tc; 1748 1749 return QEDE_TSS_COUNT(edev) ? 1750 netdev_pick_tx(dev, skb, NULL) % total_txq : 0; 1751 } 1752 1753 /* 8B udp header + 8B base tunnel header + 32B option length */ 1754 #define QEDE_MAX_TUN_HDR_LEN 48 1755 1756 netdev_features_t qede_features_check(struct sk_buff *skb, 1757 struct net_device *dev, 1758 netdev_features_t features) 1759 { 1760 if (skb->encapsulation) { 1761 u8 l4_proto = 0; 1762 1763 switch (vlan_get_protocol(skb)) { 1764 case htons(ETH_P_IP): 1765 l4_proto = ip_hdr(skb)->protocol; 1766 break; 1767 case htons(ETH_P_IPV6): 1768 l4_proto = ipv6_hdr(skb)->nexthdr; 1769 break; 1770 default: 1771 return features; 1772 } 1773 1774 /* Disable offloads for geneve tunnels, as HW can't parse 1775 * the geneve header which has option length greater than 32b 1776 * and disable offloads for the ports which are not offloaded. 1777 */ 1778 if (l4_proto == IPPROTO_UDP) { 1779 struct qede_dev *edev = netdev_priv(dev); 1780 u16 hdrlen, vxln_port, gnv_port; 1781 1782 hdrlen = QEDE_MAX_TUN_HDR_LEN; 1783 vxln_port = edev->vxlan_dst_port; 1784 gnv_port = edev->geneve_dst_port; 1785 1786 if ((skb_inner_mac_header(skb) - 1787 skb_transport_header(skb)) > hdrlen || 1788 (ntohs(udp_hdr(skb)->dest) != vxln_port && 1789 ntohs(udp_hdr(skb)->dest) != gnv_port)) 1790 return features & ~(NETIF_F_CSUM_MASK | 1791 NETIF_F_GSO_MASK); 1792 } else if (l4_proto == IPPROTO_IPIP) { 1793 /* IPIP tunnels are unknown to the device or at least unsupported natively, 1794 * offloads for them can't be done trivially, so disable them for such skb. 1795 */ 1796 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 1797 } 1798 } 1799 1800 return features; 1801 } 1802