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/gro.h> 14 #include <net/ipv6.h> 15 #include <net/tcp.h> 16 #include <linux/if_ether.h> 17 #include <linux/if_vlan.h> 18 #include <net/ip6_checksum.h> 19 #include "qede_ptp.h" 20 21 #include <linux/qed/qed_if.h> 22 #include "qede.h" 23 /********************************* 24 * Content also used by slowpath * 25 *********************************/ 26 27 int qede_alloc_rx_buffer(struct qede_rx_queue *rxq, bool allow_lazy) 28 { 29 struct sw_rx_data *sw_rx_data; 30 struct eth_rx_bd *rx_bd; 31 dma_addr_t mapping; 32 struct page *data; 33 34 /* In case lazy-allocation is allowed, postpone allocation until the 35 * end of the NAPI run. We'd still need to make sure the Rx ring has 36 * sufficient buffers to guarantee an additional Rx interrupt. 37 */ 38 if (allow_lazy && likely(rxq->filled_buffers > 12)) { 39 rxq->filled_buffers--; 40 return 0; 41 } 42 43 data = alloc_pages(GFP_ATOMIC, 0); 44 if (unlikely(!data)) 45 return -ENOMEM; 46 47 /* Map the entire page as it would be used 48 * for multiple RX buffer segment size mapping. 49 */ 50 mapping = dma_map_page(rxq->dev, data, 0, 51 PAGE_SIZE, rxq->data_direction); 52 if (unlikely(dma_mapping_error(rxq->dev, mapping))) { 53 __free_page(data); 54 return -ENOMEM; 55 } 56 57 sw_rx_data = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; 58 sw_rx_data->page_offset = 0; 59 sw_rx_data->data = data; 60 sw_rx_data->mapping = mapping; 61 62 /* Advance PROD and get BD pointer */ 63 rx_bd = (struct eth_rx_bd *)qed_chain_produce(&rxq->rx_bd_ring); 64 WARN_ON(!rx_bd); 65 rx_bd->addr.hi = cpu_to_le32(upper_32_bits(mapping)); 66 rx_bd->addr.lo = cpu_to_le32(lower_32_bits(mapping) + 67 rxq->rx_headroom); 68 69 rxq->sw_rx_prod++; 70 rxq->filled_buffers++; 71 72 return 0; 73 } 74 75 /* Unmap the data and free skb */ 76 int qede_free_tx_pkt(struct qede_dev *edev, struct qede_tx_queue *txq, int *len) 77 { 78 u16 idx = txq->sw_tx_cons; 79 struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; 80 struct eth_tx_1st_bd *first_bd; 81 struct eth_tx_bd *tx_data_bd; 82 int bds_consumed = 0; 83 int nbds; 84 bool data_split = txq->sw_tx_ring.skbs[idx].flags & QEDE_TSO_SPLIT_BD; 85 int i, split_bd_len = 0; 86 87 if (unlikely(!skb)) { 88 DP_ERR(edev, 89 "skb is null for txq idx=%d txq->sw_tx_cons=%d txq->sw_tx_prod=%d\n", 90 idx, txq->sw_tx_cons, txq->sw_tx_prod); 91 return -1; 92 } 93 94 *len = skb->len; 95 96 first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl); 97 98 bds_consumed++; 99 100 nbds = first_bd->data.nbds; 101 102 if (data_split) { 103 struct eth_tx_bd *split = (struct eth_tx_bd *) 104 qed_chain_consume(&txq->tx_pbl); 105 split_bd_len = BD_UNMAP_LEN(split); 106 bds_consumed++; 107 } 108 dma_unmap_single(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd), 109 BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); 110 111 /* Unmap the data of the skb frags */ 112 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, bds_consumed++) { 113 tx_data_bd = (struct eth_tx_bd *) 114 qed_chain_consume(&txq->tx_pbl); 115 dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(tx_data_bd), 116 BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); 117 } 118 119 while (bds_consumed++ < nbds) 120 qed_chain_consume(&txq->tx_pbl); 121 122 /* Free skb */ 123 dev_kfree_skb_any(skb); 124 txq->sw_tx_ring.skbs[idx].skb = NULL; 125 txq->sw_tx_ring.skbs[idx].flags = 0; 126 127 return 0; 128 } 129 130 /* Unmap the data and free skb when mapping failed during start_xmit */ 131 static void qede_free_failed_tx_pkt(struct qede_tx_queue *txq, 132 struct eth_tx_1st_bd *first_bd, 133 int nbd, bool data_split) 134 { 135 u16 idx = txq->sw_tx_prod; 136 struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; 137 struct eth_tx_bd *tx_data_bd; 138 int i, split_bd_len = 0; 139 140 /* Return prod to its position before this skb was handled */ 141 qed_chain_set_prod(&txq->tx_pbl, 142 le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); 143 144 first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl); 145 146 if (data_split) { 147 struct eth_tx_bd *split = (struct eth_tx_bd *) 148 qed_chain_produce(&txq->tx_pbl); 149 split_bd_len = BD_UNMAP_LEN(split); 150 nbd--; 151 } 152 153 dma_unmap_single(txq->dev, BD_UNMAP_ADDR(first_bd), 154 BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); 155 156 /* Unmap the data of the skb frags */ 157 for (i = 0; i < nbd; i++) { 158 tx_data_bd = (struct eth_tx_bd *) 159 qed_chain_produce(&txq->tx_pbl); 160 if (tx_data_bd->nbytes) 161 dma_unmap_page(txq->dev, 162 BD_UNMAP_ADDR(tx_data_bd), 163 BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); 164 } 165 166 /* Return again prod to its position before this skb was handled */ 167 qed_chain_set_prod(&txq->tx_pbl, 168 le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); 169 170 /* Free skb */ 171 dev_kfree_skb_any(skb); 172 txq->sw_tx_ring.skbs[idx].skb = NULL; 173 txq->sw_tx_ring.skbs[idx].flags = 0; 174 } 175 176 static u32 qede_xmit_type(struct sk_buff *skb, int *ipv6_ext) 177 { 178 u32 rc = XMIT_L4_CSUM; 179 __be16 l3_proto; 180 181 if (skb->ip_summed != CHECKSUM_PARTIAL) 182 return XMIT_PLAIN; 183 184 l3_proto = vlan_get_protocol(skb); 185 if (l3_proto == htons(ETH_P_IPV6) && 186 (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) 187 *ipv6_ext = 1; 188 189 if (skb->encapsulation) { 190 rc |= XMIT_ENC; 191 if (skb_is_gso(skb)) { 192 unsigned short gso_type = skb_shinfo(skb)->gso_type; 193 194 if ((gso_type & SKB_GSO_UDP_TUNNEL_CSUM) || 195 (gso_type & SKB_GSO_GRE_CSUM)) 196 rc |= XMIT_ENC_GSO_L4_CSUM; 197 198 rc |= XMIT_LSO; 199 return rc; 200 } 201 } 202 203 if (skb_is_gso(skb)) 204 rc |= XMIT_LSO; 205 206 return rc; 207 } 208 209 static void qede_set_params_for_ipv6_ext(struct sk_buff *skb, 210 struct eth_tx_2nd_bd *second_bd, 211 struct eth_tx_3rd_bd *third_bd) 212 { 213 u8 l4_proto; 214 u16 bd2_bits1 = 0, bd2_bits2 = 0; 215 216 bd2_bits1 |= (1 << ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT); 217 218 bd2_bits2 |= ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) & 219 ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_MASK) 220 << ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_SHIFT; 221 222 bd2_bits1 |= (ETH_L4_PSEUDO_CSUM_CORRECT_LENGTH << 223 ETH_TX_DATA_2ND_BD_L4_PSEUDO_CSUM_MODE_SHIFT); 224 225 if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) 226 l4_proto = ipv6_hdr(skb)->nexthdr; 227 else 228 l4_proto = ip_hdr(skb)->protocol; 229 230 if (l4_proto == IPPROTO_UDP) 231 bd2_bits1 |= 1 << ETH_TX_DATA_2ND_BD_L4_UDP_SHIFT; 232 233 if (third_bd) 234 third_bd->data.bitfields |= 235 cpu_to_le16(((tcp_hdrlen(skb) / 4) & 236 ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_MASK) << 237 ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_SHIFT); 238 239 second_bd->data.bitfields1 = cpu_to_le16(bd2_bits1); 240 second_bd->data.bitfields2 = cpu_to_le16(bd2_bits2); 241 } 242 243 static int map_frag_to_bd(struct qede_tx_queue *txq, 244 skb_frag_t *frag, struct eth_tx_bd *bd) 245 { 246 dma_addr_t mapping; 247 248 /* Map skb non-linear frag data for DMA */ 249 mapping = skb_frag_dma_map(txq->dev, frag, 0, 250 skb_frag_size(frag), DMA_TO_DEVICE); 251 if (unlikely(dma_mapping_error(txq->dev, mapping))) 252 return -ENOMEM; 253 254 /* Setup the data pointer of the frag data */ 255 BD_SET_UNMAP_ADDR_LEN(bd, mapping, skb_frag_size(frag)); 256 257 return 0; 258 } 259 260 static u16 qede_get_skb_hlen(struct sk_buff *skb, bool is_encap_pkt) 261 { 262 if (is_encap_pkt) 263 return (skb_inner_transport_header(skb) + 264 inner_tcp_hdrlen(skb) - skb->data); 265 else 266 return (skb_transport_header(skb) + 267 tcp_hdrlen(skb) - skb->data); 268 } 269 270 /* +2 for 1st BD for headers and 2nd BD for headlen (if required) */ 271 #if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) 272 static bool qede_pkt_req_lin(struct sk_buff *skb, u8 xmit_type) 273 { 274 int allowed_frags = ETH_TX_MAX_BDS_PER_NON_LSO_PACKET - 1; 275 276 if (xmit_type & XMIT_LSO) { 277 int hlen; 278 279 hlen = qede_get_skb_hlen(skb, xmit_type & XMIT_ENC); 280 281 /* linear payload would require its own BD */ 282 if (skb_headlen(skb) > hlen) 283 allowed_frags--; 284 } 285 286 return (skb_shinfo(skb)->nr_frags > allowed_frags); 287 } 288 #endif 289 290 static inline void qede_update_tx_producer(struct qede_tx_queue *txq) 291 { 292 /* wmb makes sure that the BDs data is updated before updating the 293 * producer, otherwise FW may read old data from the BDs. 294 */ 295 wmb(); 296 barrier(); 297 writel(txq->tx_db.raw, txq->doorbell_addr); 298 299 /* Fence required to flush the write combined buffer, since another 300 * CPU may write to the same doorbell address and data may be lost 301 * due to relaxed order nature of write combined bar. 302 */ 303 wmb(); 304 } 305 306 static int qede_xdp_xmit(struct qede_tx_queue *txq, dma_addr_t dma, u16 pad, 307 u16 len, struct page *page, struct xdp_frame *xdpf) 308 { 309 struct eth_tx_1st_bd *bd; 310 struct sw_tx_xdp *xdp; 311 u16 val; 312 313 if (unlikely(qed_chain_get_elem_used(&txq->tx_pbl) >= 314 txq->num_tx_buffers)) { 315 txq->stopped_cnt++; 316 return -ENOMEM; 317 } 318 319 bd = qed_chain_produce(&txq->tx_pbl); 320 bd->data.nbds = 1; 321 bd->data.bd_flags.bitfields = BIT(ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT); 322 323 val = (len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << 324 ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT; 325 326 bd->data.bitfields = cpu_to_le16(val); 327 328 /* We can safely ignore the offset, as it's 0 for XDP */ 329 BD_SET_UNMAP_ADDR_LEN(bd, dma + pad, len); 330 331 xdp = txq->sw_tx_ring.xdp + txq->sw_tx_prod; 332 xdp->mapping = dma; 333 xdp->page = page; 334 xdp->xdpf = xdpf; 335 336 txq->sw_tx_prod = (txq->sw_tx_prod + 1) % txq->num_tx_buffers; 337 338 return 0; 339 } 340 341 int qede_xdp_transmit(struct net_device *dev, int n_frames, 342 struct xdp_frame **frames, u32 flags) 343 { 344 struct qede_dev *edev = netdev_priv(dev); 345 struct device *dmadev = &edev->pdev->dev; 346 struct qede_tx_queue *xdp_tx; 347 struct xdp_frame *xdpf; 348 dma_addr_t mapping; 349 int i, nxmit = 0; 350 u16 xdp_prod; 351 352 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 353 return -EINVAL; 354 355 if (unlikely(!netif_running(dev))) 356 return -ENETDOWN; 357 358 i = smp_processor_id() % edev->total_xdp_queues; 359 xdp_tx = edev->fp_array[i].xdp_tx; 360 361 spin_lock(&xdp_tx->xdp_tx_lock); 362 363 for (i = 0; i < n_frames; i++) { 364 xdpf = frames[i]; 365 366 mapping = dma_map_single(dmadev, xdpf->data, xdpf->len, 367 DMA_TO_DEVICE); 368 if (unlikely(dma_mapping_error(dmadev, mapping))) 369 break; 370 371 if (unlikely(qede_xdp_xmit(xdp_tx, mapping, 0, xdpf->len, 372 NULL, xdpf))) 373 break; 374 nxmit++; 375 } 376 377 if (flags & XDP_XMIT_FLUSH) { 378 xdp_prod = qed_chain_get_prod_idx(&xdp_tx->tx_pbl); 379 380 xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); 381 qede_update_tx_producer(xdp_tx); 382 } 383 384 spin_unlock(&xdp_tx->xdp_tx_lock); 385 386 return nxmit; 387 } 388 389 int qede_txq_has_work(struct qede_tx_queue *txq) 390 { 391 u16 hw_bd_cons; 392 393 /* Tell compiler that consumer and producer can change */ 394 barrier(); 395 hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); 396 if (qed_chain_get_cons_idx(&txq->tx_pbl) == hw_bd_cons + 1) 397 return 0; 398 399 return hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl); 400 } 401 402 static void qede_xdp_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) 403 { 404 struct sw_tx_xdp *xdp_info, *xdp_arr = txq->sw_tx_ring.xdp; 405 struct device *dev = &edev->pdev->dev; 406 struct xdp_frame *xdpf; 407 u16 hw_bd_cons; 408 409 hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); 410 barrier(); 411 412 while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { 413 xdp_info = xdp_arr + txq->sw_tx_cons; 414 xdpf = xdp_info->xdpf; 415 416 if (xdpf) { 417 dma_unmap_single(dev, xdp_info->mapping, xdpf->len, 418 DMA_TO_DEVICE); 419 xdp_return_frame(xdpf); 420 421 xdp_info->xdpf = NULL; 422 } else { 423 dma_unmap_page(dev, xdp_info->mapping, PAGE_SIZE, 424 DMA_BIDIRECTIONAL); 425 __free_page(xdp_info->page); 426 } 427 428 qed_chain_consume(&txq->tx_pbl); 429 txq->sw_tx_cons = (txq->sw_tx_cons + 1) % txq->num_tx_buffers; 430 txq->xmit_pkts++; 431 } 432 } 433 434 static int qede_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) 435 { 436 unsigned int pkts_compl = 0, bytes_compl = 0; 437 struct netdev_queue *netdev_txq; 438 u16 hw_bd_cons; 439 int rc; 440 441 netdev_txq = netdev_get_tx_queue(edev->ndev, txq->ndev_txq_id); 442 443 hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); 444 barrier(); 445 446 while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { 447 int len = 0; 448 449 rc = qede_free_tx_pkt(edev, txq, &len); 450 if (rc) { 451 DP_NOTICE(edev, "hw_bd_cons = %d, chain_cons=%d\n", 452 hw_bd_cons, 453 qed_chain_get_cons_idx(&txq->tx_pbl)); 454 break; 455 } 456 457 bytes_compl += len; 458 pkts_compl++; 459 txq->sw_tx_cons = (txq->sw_tx_cons + 1) % txq->num_tx_buffers; 460 txq->xmit_pkts++; 461 } 462 463 netdev_tx_completed_queue(netdev_txq, pkts_compl, bytes_compl); 464 465 /* Need to make the tx_bd_cons update visible to start_xmit() 466 * before checking for netif_tx_queue_stopped(). Without the 467 * memory barrier, there is a small possibility that 468 * start_xmit() will miss it and cause the queue to be stopped 469 * forever. 470 * On the other hand we need an rmb() here to ensure the proper 471 * ordering of bit testing in the following 472 * netif_tx_queue_stopped(txq) call. 473 */ 474 smp_mb(); 475 476 if (unlikely(netif_tx_queue_stopped(netdev_txq))) { 477 /* Taking tx_lock is needed to prevent reenabling the queue 478 * while it's empty. This could have happen if rx_action() gets 479 * suspended in qede_tx_int() after the condition before 480 * netif_tx_wake_queue(), while tx_action (qede_start_xmit()): 481 * 482 * stops the queue->sees fresh tx_bd_cons->releases the queue-> 483 * sends some packets consuming the whole queue again-> 484 * stops the queue 485 */ 486 487 __netif_tx_lock(netdev_txq, smp_processor_id()); 488 489 if ((netif_tx_queue_stopped(netdev_txq)) && 490 (edev->state == QEDE_STATE_OPEN) && 491 (qed_chain_get_elem_left(&txq->tx_pbl) 492 >= (MAX_SKB_FRAGS + 1))) { 493 netif_tx_wake_queue(netdev_txq); 494 DP_VERBOSE(edev, NETIF_MSG_TX_DONE, 495 "Wake queue was called\n"); 496 } 497 498 __netif_tx_unlock(netdev_txq); 499 } 500 501 return 0; 502 } 503 504 bool qede_has_rx_work(struct qede_rx_queue *rxq) 505 { 506 u16 hw_comp_cons, sw_comp_cons; 507 508 /* Tell compiler that status block fields can change */ 509 barrier(); 510 511 hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); 512 sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); 513 514 return hw_comp_cons != sw_comp_cons; 515 } 516 517 static inline void qede_rx_bd_ring_consume(struct qede_rx_queue *rxq) 518 { 519 qed_chain_consume(&rxq->rx_bd_ring); 520 rxq->sw_rx_cons++; 521 } 522 523 /* This function reuses the buffer(from an offset) from 524 * consumer index to producer index in the bd ring 525 */ 526 static inline void qede_reuse_page(struct qede_rx_queue *rxq, 527 struct sw_rx_data *curr_cons) 528 { 529 struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring); 530 struct sw_rx_data *curr_prod; 531 dma_addr_t new_mapping; 532 533 curr_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; 534 *curr_prod = *curr_cons; 535 536 new_mapping = curr_prod->mapping + curr_prod->page_offset; 537 538 rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(new_mapping)); 539 rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(new_mapping) + 540 rxq->rx_headroom); 541 542 rxq->sw_rx_prod++; 543 curr_cons->data = NULL; 544 } 545 546 /* In case of allocation failures reuse buffers 547 * from consumer index to produce buffers for firmware 548 */ 549 void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq, u8 count) 550 { 551 struct sw_rx_data *curr_cons; 552 553 for (; count > 0; count--) { 554 curr_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; 555 qede_reuse_page(rxq, curr_cons); 556 qede_rx_bd_ring_consume(rxq); 557 } 558 } 559 560 static inline int qede_realloc_rx_buffer(struct qede_rx_queue *rxq, 561 struct sw_rx_data *curr_cons) 562 { 563 /* Move to the next segment in the page */ 564 curr_cons->page_offset += rxq->rx_buf_seg_size; 565 566 if (curr_cons->page_offset == PAGE_SIZE) { 567 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 568 /* Since we failed to allocate new buffer 569 * current buffer can be used again. 570 */ 571 curr_cons->page_offset -= rxq->rx_buf_seg_size; 572 573 return -ENOMEM; 574 } 575 576 dma_unmap_page(rxq->dev, curr_cons->mapping, 577 PAGE_SIZE, rxq->data_direction); 578 } else { 579 /* Increment refcount of the page as we don't want 580 * network stack to take the ownership of the page 581 * which can be recycled multiple times by the driver. 582 */ 583 page_ref_inc(curr_cons->data); 584 qede_reuse_page(rxq, curr_cons); 585 } 586 587 return 0; 588 } 589 590 void qede_update_rx_prod(struct qede_dev *edev, struct qede_rx_queue *rxq) 591 { 592 u16 bd_prod = qed_chain_get_prod_idx(&rxq->rx_bd_ring); 593 u16 cqe_prod = qed_chain_get_prod_idx(&rxq->rx_comp_ring); 594 struct eth_rx_prod_data rx_prods = {0}; 595 596 /* Update producers */ 597 rx_prods.bd_prod = cpu_to_le16(bd_prod); 598 rx_prods.cqe_prod = cpu_to_le16(cqe_prod); 599 600 /* Make sure that the BD and SGE data is updated before updating the 601 * producers since FW might read the BD/SGE right after the producer 602 * is updated. 603 */ 604 wmb(); 605 606 internal_ram_wr(rxq->hw_rxq_prod_addr, sizeof(rx_prods), 607 (u32 *)&rx_prods); 608 } 609 610 static void qede_get_rxhash(struct sk_buff *skb, u8 bitfields, __le32 rss_hash) 611 { 612 enum pkt_hash_types hash_type = PKT_HASH_TYPE_NONE; 613 enum rss_hash_type htype; 614 u32 hash = 0; 615 616 htype = GET_FIELD(bitfields, ETH_FAST_PATH_RX_REG_CQE_RSS_HASH_TYPE); 617 if (htype) { 618 hash_type = ((htype == RSS_HASH_TYPE_IPV4) || 619 (htype == RSS_HASH_TYPE_IPV6)) ? 620 PKT_HASH_TYPE_L3 : PKT_HASH_TYPE_L4; 621 hash = le32_to_cpu(rss_hash); 622 } 623 skb_set_hash(skb, hash, hash_type); 624 } 625 626 static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag) 627 { 628 skb_checksum_none_assert(skb); 629 630 if (csum_flag & QEDE_CSUM_UNNECESSARY) 631 skb->ip_summed = CHECKSUM_UNNECESSARY; 632 633 if (csum_flag & QEDE_TUNN_CSUM_UNNECESSARY) { 634 skb->csum_level = 1; 635 skb->encapsulation = 1; 636 } 637 } 638 639 static inline void qede_skb_receive(struct qede_dev *edev, 640 struct qede_fastpath *fp, 641 struct qede_rx_queue *rxq, 642 struct sk_buff *skb, u16 vlan_tag) 643 { 644 if (vlan_tag) 645 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag); 646 647 napi_gro_receive(&fp->napi, skb); 648 } 649 650 static void qede_set_gro_params(struct qede_dev *edev, 651 struct sk_buff *skb, 652 struct eth_fast_path_rx_tpa_start_cqe *cqe) 653 { 654 u16 parsing_flags = le16_to_cpu(cqe->pars_flags.flags); 655 656 if (((parsing_flags >> PARSING_AND_ERR_FLAGS_L3TYPE_SHIFT) & 657 PARSING_AND_ERR_FLAGS_L3TYPE_MASK) == 2) 658 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 659 else 660 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 661 662 skb_shinfo(skb)->gso_size = __le16_to_cpu(cqe->len_on_first_bd) - 663 cqe->header_len; 664 } 665 666 static int qede_fill_frag_skb(struct qede_dev *edev, 667 struct qede_rx_queue *rxq, 668 u8 tpa_agg_index, u16 len_on_bd) 669 { 670 struct sw_rx_data *current_bd = &rxq->sw_rx_ring[rxq->sw_rx_cons & 671 NUM_RX_BDS_MAX]; 672 struct qede_agg_info *tpa_info = &rxq->tpa_info[tpa_agg_index]; 673 struct sk_buff *skb = tpa_info->skb; 674 675 if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) 676 goto out; 677 678 /* Add one frag and update the appropriate fields in the skb */ 679 skb_fill_page_desc(skb, tpa_info->frag_id++, 680 current_bd->data, 681 current_bd->page_offset + rxq->rx_headroom, 682 len_on_bd); 683 684 if (unlikely(qede_realloc_rx_buffer(rxq, current_bd))) { 685 /* Incr page ref count to reuse on allocation failure 686 * so that it doesn't get freed while freeing SKB. 687 */ 688 page_ref_inc(current_bd->data); 689 goto out; 690 } 691 692 qede_rx_bd_ring_consume(rxq); 693 694 skb->data_len += len_on_bd; 695 skb->truesize += rxq->rx_buf_seg_size; 696 skb->len += len_on_bd; 697 698 return 0; 699 700 out: 701 tpa_info->state = QEDE_AGG_STATE_ERROR; 702 qede_recycle_rx_bd_ring(rxq, 1); 703 704 return -ENOMEM; 705 } 706 707 static bool qede_tunn_exist(u16 flag) 708 { 709 return !!(flag & (PARSING_AND_ERR_FLAGS_TUNNELEXIST_MASK << 710 PARSING_AND_ERR_FLAGS_TUNNELEXIST_SHIFT)); 711 } 712 713 static u8 qede_check_tunn_csum(u16 flag) 714 { 715 u16 csum_flag = 0; 716 u8 tcsum = 0; 717 718 if (flag & (PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_MASK << 719 PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_SHIFT)) 720 csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_MASK << 721 PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_SHIFT; 722 723 if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << 724 PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { 725 csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << 726 PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; 727 tcsum = QEDE_TUNN_CSUM_UNNECESSARY; 728 } 729 730 csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_MASK << 731 PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_SHIFT | 732 PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << 733 PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; 734 735 if (csum_flag & flag) 736 return QEDE_CSUM_ERROR; 737 738 return QEDE_CSUM_UNNECESSARY | tcsum; 739 } 740 741 static inline struct sk_buff * 742 qede_build_skb(struct qede_rx_queue *rxq, 743 struct sw_rx_data *bd, u16 len, u16 pad) 744 { 745 struct sk_buff *skb; 746 void *buf; 747 748 buf = page_address(bd->data) + bd->page_offset; 749 skb = build_skb(buf, rxq->rx_buf_seg_size); 750 751 skb_reserve(skb, pad); 752 skb_put(skb, len); 753 754 return skb; 755 } 756 757 static struct sk_buff * 758 qede_tpa_rx_build_skb(struct qede_dev *edev, 759 struct qede_rx_queue *rxq, 760 struct sw_rx_data *bd, u16 len, u16 pad, 761 bool alloc_skb) 762 { 763 struct sk_buff *skb; 764 765 skb = qede_build_skb(rxq, bd, len, pad); 766 bd->page_offset += rxq->rx_buf_seg_size; 767 768 if (bd->page_offset == PAGE_SIZE) { 769 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 770 DP_NOTICE(edev, 771 "Failed to allocate RX buffer for tpa start\n"); 772 bd->page_offset -= rxq->rx_buf_seg_size; 773 page_ref_inc(bd->data); 774 dev_kfree_skb_any(skb); 775 return NULL; 776 } 777 } else { 778 page_ref_inc(bd->data); 779 qede_reuse_page(rxq, bd); 780 } 781 782 /* We've consumed the first BD and prepared an SKB */ 783 qede_rx_bd_ring_consume(rxq); 784 785 return skb; 786 } 787 788 static struct sk_buff * 789 qede_rx_build_skb(struct qede_dev *edev, 790 struct qede_rx_queue *rxq, 791 struct sw_rx_data *bd, u16 len, u16 pad) 792 { 793 struct sk_buff *skb = NULL; 794 795 /* For smaller frames still need to allocate skb, memcpy 796 * data and benefit in reusing the page segment instead of 797 * un-mapping it. 798 */ 799 if ((len + pad <= edev->rx_copybreak)) { 800 unsigned int offset = bd->page_offset + pad; 801 802 skb = netdev_alloc_skb(edev->ndev, QEDE_RX_HDR_SIZE); 803 if (unlikely(!skb)) 804 return NULL; 805 806 skb_reserve(skb, pad); 807 skb_put_data(skb, page_address(bd->data) + offset, len); 808 qede_reuse_page(rxq, bd); 809 goto out; 810 } 811 812 skb = qede_build_skb(rxq, bd, len, pad); 813 814 if (unlikely(qede_realloc_rx_buffer(rxq, bd))) { 815 /* Incr page ref count to reuse on allocation failure so 816 * that it doesn't get freed while freeing SKB [as its 817 * already mapped there]. 818 */ 819 page_ref_inc(bd->data); 820 dev_kfree_skb_any(skb); 821 return NULL; 822 } 823 out: 824 /* We've consumed the first BD and prepared an SKB */ 825 qede_rx_bd_ring_consume(rxq); 826 827 return skb; 828 } 829 830 static void qede_tpa_start(struct qede_dev *edev, 831 struct qede_rx_queue *rxq, 832 struct eth_fast_path_rx_tpa_start_cqe *cqe) 833 { 834 struct qede_agg_info *tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; 835 struct sw_rx_data *sw_rx_data_cons; 836 u16 pad; 837 838 sw_rx_data_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; 839 pad = cqe->placement_offset + rxq->rx_headroom; 840 841 tpa_info->skb = qede_tpa_rx_build_skb(edev, rxq, sw_rx_data_cons, 842 le16_to_cpu(cqe->len_on_first_bd), 843 pad, false); 844 tpa_info->buffer.page_offset = sw_rx_data_cons->page_offset; 845 tpa_info->buffer.mapping = sw_rx_data_cons->mapping; 846 847 if (unlikely(!tpa_info->skb)) { 848 DP_NOTICE(edev, "Failed to allocate SKB for gro\n"); 849 850 /* Consume from ring but do not produce since 851 * this might be used by FW still, it will be re-used 852 * at TPA end. 853 */ 854 tpa_info->tpa_start_fail = true; 855 qede_rx_bd_ring_consume(rxq); 856 tpa_info->state = QEDE_AGG_STATE_ERROR; 857 goto cons_buf; 858 } 859 860 tpa_info->frag_id = 0; 861 tpa_info->state = QEDE_AGG_STATE_START; 862 863 if ((le16_to_cpu(cqe->pars_flags.flags) >> 864 PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT) & 865 PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK) 866 tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag); 867 else 868 tpa_info->vlan_tag = 0; 869 870 qede_get_rxhash(tpa_info->skb, cqe->bitfields, cqe->rss_hash); 871 872 /* This is needed in order to enable forwarding support */ 873 qede_set_gro_params(edev, tpa_info->skb, cqe); 874 875 cons_buf: /* We still need to handle bd_len_list to consume buffers */ 876 if (likely(cqe->bw_ext_bd_len_list[0])) 877 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, 878 le16_to_cpu(cqe->bw_ext_bd_len_list[0])); 879 880 if (unlikely(cqe->bw_ext_bd_len_list[1])) { 881 DP_ERR(edev, 882 "Unlikely - got a TPA aggregation with more than one bw_ext_bd_len_list entry in the TPA start\n"); 883 tpa_info->state = QEDE_AGG_STATE_ERROR; 884 } 885 } 886 887 #ifdef CONFIG_INET 888 static void qede_gro_ip_csum(struct sk_buff *skb) 889 { 890 const struct iphdr *iph = ip_hdr(skb); 891 struct tcphdr *th; 892 893 skb_set_transport_header(skb, sizeof(struct iphdr)); 894 th = tcp_hdr(skb); 895 896 th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb), 897 iph->saddr, iph->daddr, 0); 898 899 tcp_gro_complete(skb); 900 } 901 902 static void qede_gro_ipv6_csum(struct sk_buff *skb) 903 { 904 struct ipv6hdr *iph = ipv6_hdr(skb); 905 struct tcphdr *th; 906 907 skb_set_transport_header(skb, sizeof(struct ipv6hdr)); 908 th = tcp_hdr(skb); 909 910 th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb), 911 &iph->saddr, &iph->daddr, 0); 912 tcp_gro_complete(skb); 913 } 914 #endif 915 916 static void qede_gro_receive(struct qede_dev *edev, 917 struct qede_fastpath *fp, 918 struct sk_buff *skb, 919 u16 vlan_tag) 920 { 921 /* FW can send a single MTU sized packet from gro flow 922 * due to aggregation timeout/last segment etc. which 923 * is not expected to be a gro packet. If a skb has zero 924 * frags then simply push it in the stack as non gso skb. 925 */ 926 if (unlikely(!skb->data_len)) { 927 skb_shinfo(skb)->gso_type = 0; 928 skb_shinfo(skb)->gso_size = 0; 929 goto send_skb; 930 } 931 932 #ifdef CONFIG_INET 933 if (skb_shinfo(skb)->gso_size) { 934 skb_reset_network_header(skb); 935 936 switch (skb->protocol) { 937 case htons(ETH_P_IP): 938 qede_gro_ip_csum(skb); 939 break; 940 case htons(ETH_P_IPV6): 941 qede_gro_ipv6_csum(skb); 942 break; 943 default: 944 DP_ERR(edev, 945 "Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n", 946 ntohs(skb->protocol)); 947 } 948 } 949 #endif 950 951 send_skb: 952 skb_record_rx_queue(skb, fp->rxq->rxq_id); 953 qede_skb_receive(edev, fp, fp->rxq, skb, vlan_tag); 954 } 955 956 static inline void qede_tpa_cont(struct qede_dev *edev, 957 struct qede_rx_queue *rxq, 958 struct eth_fast_path_rx_tpa_cont_cqe *cqe) 959 { 960 int i; 961 962 for (i = 0; cqe->len_list[i]; i++) 963 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, 964 le16_to_cpu(cqe->len_list[i])); 965 966 if (unlikely(i > 1)) 967 DP_ERR(edev, 968 "Strange - TPA cont with more than a single len_list entry\n"); 969 } 970 971 static int qede_tpa_end(struct qede_dev *edev, 972 struct qede_fastpath *fp, 973 struct eth_fast_path_rx_tpa_end_cqe *cqe) 974 { 975 struct qede_rx_queue *rxq = fp->rxq; 976 struct qede_agg_info *tpa_info; 977 struct sk_buff *skb; 978 int i; 979 980 tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; 981 skb = tpa_info->skb; 982 983 if (tpa_info->buffer.page_offset == PAGE_SIZE) 984 dma_unmap_page(rxq->dev, tpa_info->buffer.mapping, 985 PAGE_SIZE, rxq->data_direction); 986 987 for (i = 0; cqe->len_list[i]; i++) 988 qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, 989 le16_to_cpu(cqe->len_list[i])); 990 if (unlikely(i > 1)) 991 DP_ERR(edev, 992 "Strange - TPA emd with more than a single len_list entry\n"); 993 994 if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) 995 goto err; 996 997 /* Sanity */ 998 if (unlikely(cqe->num_of_bds != tpa_info->frag_id + 1)) 999 DP_ERR(edev, 1000 "Strange - TPA had %02x BDs, but SKB has only %d frags\n", 1001 cqe->num_of_bds, tpa_info->frag_id); 1002 if (unlikely(skb->len != le16_to_cpu(cqe->total_packet_len))) 1003 DP_ERR(edev, 1004 "Strange - total packet len [cqe] is %4x but SKB has len %04x\n", 1005 le16_to_cpu(cqe->total_packet_len), skb->len); 1006 1007 /* Finalize the SKB */ 1008 skb->protocol = eth_type_trans(skb, edev->ndev); 1009 skb->ip_summed = CHECKSUM_UNNECESSARY; 1010 1011 /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count 1012 * to skb_shinfo(skb)->gso_segs 1013 */ 1014 NAPI_GRO_CB(skb)->count = le16_to_cpu(cqe->num_of_coalesced_segs); 1015 1016 qede_gro_receive(edev, fp, skb, tpa_info->vlan_tag); 1017 1018 tpa_info->state = QEDE_AGG_STATE_NONE; 1019 1020 return 1; 1021 err: 1022 tpa_info->state = QEDE_AGG_STATE_NONE; 1023 1024 if (tpa_info->tpa_start_fail) { 1025 qede_reuse_page(rxq, &tpa_info->buffer); 1026 tpa_info->tpa_start_fail = false; 1027 } 1028 1029 dev_kfree_skb_any(tpa_info->skb); 1030 tpa_info->skb = NULL; 1031 return 0; 1032 } 1033 1034 static u8 qede_check_notunn_csum(u16 flag) 1035 { 1036 u16 csum_flag = 0; 1037 u8 csum = 0; 1038 1039 if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << 1040 PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { 1041 csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << 1042 PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; 1043 csum = QEDE_CSUM_UNNECESSARY; 1044 } 1045 1046 csum_flag |= PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << 1047 PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; 1048 1049 if (csum_flag & flag) 1050 return QEDE_CSUM_ERROR; 1051 1052 return csum; 1053 } 1054 1055 static u8 qede_check_csum(u16 flag) 1056 { 1057 if (!qede_tunn_exist(flag)) 1058 return qede_check_notunn_csum(flag); 1059 else 1060 return qede_check_tunn_csum(flag); 1061 } 1062 1063 static bool qede_pkt_is_ip_fragmented(struct eth_fast_path_rx_reg_cqe *cqe, 1064 u16 flag) 1065 { 1066 u8 tun_pars_flg = cqe->tunnel_pars_flags.flags; 1067 1068 if ((tun_pars_flg & (ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_MASK << 1069 ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_SHIFT)) || 1070 (flag & (PARSING_AND_ERR_FLAGS_IPV4FRAG_MASK << 1071 PARSING_AND_ERR_FLAGS_IPV4FRAG_SHIFT))) 1072 return true; 1073 1074 return false; 1075 } 1076 1077 /* Return true iff packet is to be passed to stack */ 1078 static bool qede_rx_xdp(struct qede_dev *edev, 1079 struct qede_fastpath *fp, 1080 struct qede_rx_queue *rxq, 1081 struct bpf_prog *prog, 1082 struct sw_rx_data *bd, 1083 struct eth_fast_path_rx_reg_cqe *cqe, 1084 u16 *data_offset, u16 *len) 1085 { 1086 struct xdp_buff xdp; 1087 enum xdp_action act; 1088 1089 xdp_init_buff(&xdp, rxq->rx_buf_seg_size, &rxq->xdp_rxq); 1090 xdp_prepare_buff(&xdp, page_address(bd->data), *data_offset, 1091 *len, false); 1092 1093 act = bpf_prog_run_xdp(prog, &xdp); 1094 1095 /* Recalculate, as XDP might have changed the headers */ 1096 *data_offset = xdp.data - xdp.data_hard_start; 1097 *len = xdp.data_end - xdp.data; 1098 1099 if (act == XDP_PASS) 1100 return true; 1101 1102 /* Count number of packets not to be passed to stack */ 1103 rxq->xdp_no_pass++; 1104 1105 switch (act) { 1106 case XDP_TX: 1107 /* We need the replacement buffer before transmit. */ 1108 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 1109 qede_recycle_rx_bd_ring(rxq, 1); 1110 1111 trace_xdp_exception(edev->ndev, prog, act); 1112 break; 1113 } 1114 1115 /* Now if there's a transmission problem, we'd still have to 1116 * throw current buffer, as replacement was already allocated. 1117 */ 1118 if (unlikely(qede_xdp_xmit(fp->xdp_tx, bd->mapping, 1119 *data_offset, *len, bd->data, 1120 NULL))) { 1121 dma_unmap_page(rxq->dev, bd->mapping, PAGE_SIZE, 1122 rxq->data_direction); 1123 __free_page(bd->data); 1124 1125 trace_xdp_exception(edev->ndev, prog, act); 1126 } else { 1127 dma_sync_single_for_device(rxq->dev, 1128 bd->mapping + *data_offset, 1129 *len, rxq->data_direction); 1130 fp->xdp_xmit |= QEDE_XDP_TX; 1131 } 1132 1133 /* Regardless, we've consumed an Rx BD */ 1134 qede_rx_bd_ring_consume(rxq); 1135 break; 1136 case XDP_REDIRECT: 1137 /* We need the replacement buffer before transmit. */ 1138 if (unlikely(qede_alloc_rx_buffer(rxq, true))) { 1139 qede_recycle_rx_bd_ring(rxq, 1); 1140 1141 trace_xdp_exception(edev->ndev, prog, act); 1142 break; 1143 } 1144 1145 dma_unmap_page(rxq->dev, bd->mapping, PAGE_SIZE, 1146 rxq->data_direction); 1147 1148 if (unlikely(xdp_do_redirect(edev->ndev, &xdp, prog))) 1149 DP_NOTICE(edev, "Failed to redirect the packet\n"); 1150 else 1151 fp->xdp_xmit |= QEDE_XDP_REDIRECT; 1152 1153 qede_rx_bd_ring_consume(rxq); 1154 break; 1155 default: 1156 bpf_warn_invalid_xdp_action(edev->ndev, prog, act); 1157 fallthrough; 1158 case XDP_ABORTED: 1159 trace_xdp_exception(edev->ndev, prog, act); 1160 fallthrough; 1161 case XDP_DROP: 1162 qede_recycle_rx_bd_ring(rxq, cqe->bd_num); 1163 } 1164 1165 return false; 1166 } 1167 1168 static int qede_rx_build_jumbo(struct qede_dev *edev, 1169 struct qede_rx_queue *rxq, 1170 struct sk_buff *skb, 1171 struct eth_fast_path_rx_reg_cqe *cqe, 1172 u16 first_bd_len) 1173 { 1174 u16 pkt_len = le16_to_cpu(cqe->pkt_len); 1175 struct sw_rx_data *bd; 1176 u16 bd_cons_idx; 1177 u8 num_frags; 1178 1179 pkt_len -= first_bd_len; 1180 1181 /* We've already used one BD for the SKB. Now take care of the rest */ 1182 for (num_frags = cqe->bd_num - 1; num_frags > 0; num_frags--) { 1183 u16 cur_size = pkt_len > rxq->rx_buf_size ? rxq->rx_buf_size : 1184 pkt_len; 1185 1186 if (unlikely(!cur_size)) { 1187 DP_ERR(edev, 1188 "Still got %d BDs for mapping jumbo, but length became 0\n", 1189 num_frags); 1190 goto out; 1191 } 1192 1193 /* We need a replacement buffer for each BD */ 1194 if (unlikely(qede_alloc_rx_buffer(rxq, true))) 1195 goto out; 1196 1197 /* Now that we've allocated the replacement buffer, 1198 * we can safely consume the next BD and map it to the SKB. 1199 */ 1200 bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; 1201 bd = &rxq->sw_rx_ring[bd_cons_idx]; 1202 qede_rx_bd_ring_consume(rxq); 1203 1204 dma_unmap_page(rxq->dev, bd->mapping, 1205 PAGE_SIZE, DMA_FROM_DEVICE); 1206 1207 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, bd->data, 1208 rxq->rx_headroom, cur_size, PAGE_SIZE); 1209 1210 pkt_len -= cur_size; 1211 } 1212 1213 if (unlikely(pkt_len)) 1214 DP_ERR(edev, 1215 "Mapped all BDs of jumbo, but still have %d bytes\n", 1216 pkt_len); 1217 1218 out: 1219 return num_frags; 1220 } 1221 1222 static int qede_rx_process_tpa_cqe(struct qede_dev *edev, 1223 struct qede_fastpath *fp, 1224 struct qede_rx_queue *rxq, 1225 union eth_rx_cqe *cqe, 1226 enum eth_rx_cqe_type type) 1227 { 1228 switch (type) { 1229 case ETH_RX_CQE_TYPE_TPA_START: 1230 qede_tpa_start(edev, rxq, &cqe->fast_path_tpa_start); 1231 return 0; 1232 case ETH_RX_CQE_TYPE_TPA_CONT: 1233 qede_tpa_cont(edev, rxq, &cqe->fast_path_tpa_cont); 1234 return 0; 1235 case ETH_RX_CQE_TYPE_TPA_END: 1236 return qede_tpa_end(edev, fp, &cqe->fast_path_tpa_end); 1237 default: 1238 return 0; 1239 } 1240 } 1241 1242 static int qede_rx_process_cqe(struct qede_dev *edev, 1243 struct qede_fastpath *fp, 1244 struct qede_rx_queue *rxq) 1245 { 1246 struct bpf_prog *xdp_prog = READ_ONCE(rxq->xdp_prog); 1247 struct eth_fast_path_rx_reg_cqe *fp_cqe; 1248 u16 len, pad, bd_cons_idx, parse_flag; 1249 enum eth_rx_cqe_type cqe_type; 1250 union eth_rx_cqe *cqe; 1251 struct sw_rx_data *bd; 1252 struct sk_buff *skb; 1253 __le16 flags; 1254 u8 csum_flag; 1255 1256 /* Get the CQE from the completion ring */ 1257 cqe = (union eth_rx_cqe *)qed_chain_consume(&rxq->rx_comp_ring); 1258 cqe_type = cqe->fast_path_regular.type; 1259 1260 /* Process an unlikely slowpath event */ 1261 if (unlikely(cqe_type == ETH_RX_CQE_TYPE_SLOW_PATH)) { 1262 struct eth_slow_path_rx_cqe *sp_cqe; 1263 1264 sp_cqe = (struct eth_slow_path_rx_cqe *)cqe; 1265 edev->ops->eth_cqe_completion(edev->cdev, fp->id, sp_cqe); 1266 return 0; 1267 } 1268 1269 /* Handle TPA cqes */ 1270 if (cqe_type != ETH_RX_CQE_TYPE_REGULAR) 1271 return qede_rx_process_tpa_cqe(edev, fp, rxq, cqe, cqe_type); 1272 1273 /* Get the data from the SW ring; Consume it only after it's evident 1274 * we wouldn't recycle it. 1275 */ 1276 bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; 1277 bd = &rxq->sw_rx_ring[bd_cons_idx]; 1278 1279 fp_cqe = &cqe->fast_path_regular; 1280 len = le16_to_cpu(fp_cqe->len_on_first_bd); 1281 pad = fp_cqe->placement_offset + rxq->rx_headroom; 1282 1283 /* Run eBPF program if one is attached */ 1284 if (xdp_prog) 1285 if (!qede_rx_xdp(edev, fp, rxq, xdp_prog, bd, fp_cqe, 1286 &pad, &len)) 1287 return 0; 1288 1289 /* If this is an error packet then drop it */ 1290 flags = cqe->fast_path_regular.pars_flags.flags; 1291 parse_flag = le16_to_cpu(flags); 1292 1293 csum_flag = qede_check_csum(parse_flag); 1294 if (unlikely(csum_flag == QEDE_CSUM_ERROR)) { 1295 if (qede_pkt_is_ip_fragmented(fp_cqe, parse_flag)) 1296 rxq->rx_ip_frags++; 1297 else 1298 rxq->rx_hw_errors++; 1299 } 1300 1301 /* Basic validation passed; Need to prepare an SKB. This would also 1302 * guarantee to finally consume the first BD upon success. 1303 */ 1304 skb = qede_rx_build_skb(edev, rxq, bd, len, pad); 1305 if (!skb) { 1306 rxq->rx_alloc_errors++; 1307 qede_recycle_rx_bd_ring(rxq, fp_cqe->bd_num); 1308 return 0; 1309 } 1310 1311 /* In case of Jumbo packet, several PAGE_SIZEd buffers will be pointed 1312 * by a single cqe. 1313 */ 1314 if (fp_cqe->bd_num > 1) { 1315 u16 unmapped_frags = qede_rx_build_jumbo(edev, rxq, skb, 1316 fp_cqe, len); 1317 1318 if (unlikely(unmapped_frags > 0)) { 1319 qede_recycle_rx_bd_ring(rxq, unmapped_frags); 1320 dev_kfree_skb_any(skb); 1321 return 0; 1322 } 1323 } 1324 1325 /* The SKB contains all the data. Now prepare meta-magic */ 1326 skb->protocol = eth_type_trans(skb, edev->ndev); 1327 qede_get_rxhash(skb, fp_cqe->bitfields, fp_cqe->rss_hash); 1328 qede_set_skb_csum(skb, csum_flag); 1329 skb_record_rx_queue(skb, rxq->rxq_id); 1330 qede_ptp_record_rx_ts(edev, cqe, skb); 1331 1332 /* SKB is prepared - pass it to stack */ 1333 qede_skb_receive(edev, fp, rxq, skb, le16_to_cpu(fp_cqe->vlan_tag)); 1334 1335 return 1; 1336 } 1337 1338 static int qede_rx_int(struct qede_fastpath *fp, int budget) 1339 { 1340 struct qede_rx_queue *rxq = fp->rxq; 1341 struct qede_dev *edev = fp->edev; 1342 int work_done = 0, rcv_pkts = 0; 1343 u16 hw_comp_cons, sw_comp_cons; 1344 1345 hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); 1346 sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); 1347 1348 /* Memory barrier to prevent the CPU from doing speculative reads of CQE 1349 * / BD in the while-loop before reading hw_comp_cons. If the CQE is 1350 * read before it is written by FW, then FW writes CQE and SB, and then 1351 * the CPU reads the hw_comp_cons, it will use an old CQE. 1352 */ 1353 rmb(); 1354 1355 /* Loop to complete all indicated BDs */ 1356 while ((sw_comp_cons != hw_comp_cons) && (work_done < budget)) { 1357 rcv_pkts += qede_rx_process_cqe(edev, fp, rxq); 1358 qed_chain_recycle_consumed(&rxq->rx_comp_ring); 1359 sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); 1360 work_done++; 1361 } 1362 1363 rxq->rcv_pkts += rcv_pkts; 1364 1365 /* Allocate replacement buffers */ 1366 while (rxq->num_rx_buffers - rxq->filled_buffers) 1367 if (qede_alloc_rx_buffer(rxq, false)) 1368 break; 1369 1370 /* Update producers */ 1371 qede_update_rx_prod(edev, rxq); 1372 1373 return work_done; 1374 } 1375 1376 static bool qede_poll_is_more_work(struct qede_fastpath *fp) 1377 { 1378 qed_sb_update_sb_idx(fp->sb_info); 1379 1380 /* *_has_*_work() reads the status block, thus we need to ensure that 1381 * status block indices have been actually read (qed_sb_update_sb_idx) 1382 * prior to this check (*_has_*_work) so that we won't write the 1383 * "newer" value of the status block to HW (if there was a DMA right 1384 * after qede_has_rx_work and if there is no rmb, the memory reading 1385 * (qed_sb_update_sb_idx) may be postponed to right before *_ack_sb). 1386 * In this case there will never be another interrupt until there is 1387 * another update of the status block, while there is still unhandled 1388 * work. 1389 */ 1390 rmb(); 1391 1392 if (likely(fp->type & QEDE_FASTPATH_RX)) 1393 if (qede_has_rx_work(fp->rxq)) 1394 return true; 1395 1396 if (fp->type & QEDE_FASTPATH_XDP) 1397 if (qede_txq_has_work(fp->xdp_tx)) 1398 return true; 1399 1400 if (likely(fp->type & QEDE_FASTPATH_TX)) { 1401 int cos; 1402 1403 for_each_cos_in_txq(fp->edev, cos) { 1404 if (qede_txq_has_work(&fp->txq[cos])) 1405 return true; 1406 } 1407 } 1408 1409 return false; 1410 } 1411 1412 /********************* 1413 * NDO & API related * 1414 *********************/ 1415 int qede_poll(struct napi_struct *napi, int budget) 1416 { 1417 struct qede_fastpath *fp = container_of(napi, struct qede_fastpath, 1418 napi); 1419 struct qede_dev *edev = fp->edev; 1420 int rx_work_done = 0; 1421 u16 xdp_prod; 1422 1423 fp->xdp_xmit = 0; 1424 1425 if (likely(fp->type & QEDE_FASTPATH_TX)) { 1426 int cos; 1427 1428 for_each_cos_in_txq(fp->edev, cos) { 1429 if (qede_txq_has_work(&fp->txq[cos])) 1430 qede_tx_int(edev, &fp->txq[cos]); 1431 } 1432 } 1433 1434 if ((fp->type & QEDE_FASTPATH_XDP) && qede_txq_has_work(fp->xdp_tx)) 1435 qede_xdp_tx_int(edev, fp->xdp_tx); 1436 1437 rx_work_done = (likely(fp->type & QEDE_FASTPATH_RX) && 1438 qede_has_rx_work(fp->rxq)) ? 1439 qede_rx_int(fp, budget) : 0; 1440 /* Handle case where we are called by netpoll with a budget of 0 */ 1441 if (rx_work_done < budget || !budget) { 1442 if (!qede_poll_is_more_work(fp)) { 1443 napi_complete_done(napi, rx_work_done); 1444 1445 /* Update and reenable interrupts */ 1446 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1); 1447 } else { 1448 rx_work_done = budget; 1449 } 1450 } 1451 1452 if (fp->xdp_xmit & QEDE_XDP_TX) { 1453 xdp_prod = qed_chain_get_prod_idx(&fp->xdp_tx->tx_pbl); 1454 1455 fp->xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); 1456 qede_update_tx_producer(fp->xdp_tx); 1457 } 1458 1459 if (fp->xdp_xmit & QEDE_XDP_REDIRECT) 1460 xdp_do_flush_map(); 1461 1462 return rx_work_done; 1463 } 1464 1465 irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie) 1466 { 1467 struct qede_fastpath *fp = fp_cookie; 1468 1469 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/); 1470 1471 napi_schedule_irqoff(&fp->napi); 1472 return IRQ_HANDLED; 1473 } 1474 1475 /* Main transmit function */ 1476 netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev) 1477 { 1478 struct qede_dev *edev = netdev_priv(ndev); 1479 struct netdev_queue *netdev_txq; 1480 struct qede_tx_queue *txq; 1481 struct eth_tx_1st_bd *first_bd; 1482 struct eth_tx_2nd_bd *second_bd = NULL; 1483 struct eth_tx_3rd_bd *third_bd = NULL; 1484 struct eth_tx_bd *tx_data_bd = NULL; 1485 u16 txq_index, val = 0; 1486 u8 nbd = 0; 1487 dma_addr_t mapping; 1488 int rc, frag_idx = 0, ipv6_ext = 0; 1489 u8 xmit_type; 1490 u16 idx; 1491 u16 hlen; 1492 bool data_split = false; 1493 1494 /* Get tx-queue context and netdev index */ 1495 txq_index = skb_get_queue_mapping(skb); 1496 WARN_ON(txq_index >= QEDE_TSS_COUNT(edev) * edev->dev_info.num_tc); 1497 txq = QEDE_NDEV_TXQ_ID_TO_TXQ(edev, txq_index); 1498 netdev_txq = netdev_get_tx_queue(ndev, txq_index); 1499 1500 WARN_ON(qed_chain_get_elem_left(&txq->tx_pbl) < (MAX_SKB_FRAGS + 1)); 1501 1502 xmit_type = qede_xmit_type(skb, &ipv6_ext); 1503 1504 #if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) 1505 if (qede_pkt_req_lin(skb, xmit_type)) { 1506 if (skb_linearize(skb)) { 1507 txq->tx_mem_alloc_err++; 1508 1509 dev_kfree_skb_any(skb); 1510 return NETDEV_TX_OK; 1511 } 1512 } 1513 #endif 1514 1515 /* Fill the entry in the SW ring and the BDs in the FW ring */ 1516 idx = txq->sw_tx_prod; 1517 txq->sw_tx_ring.skbs[idx].skb = skb; 1518 first_bd = (struct eth_tx_1st_bd *) 1519 qed_chain_produce(&txq->tx_pbl); 1520 memset(first_bd, 0, sizeof(*first_bd)); 1521 first_bd->data.bd_flags.bitfields = 1522 1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT; 1523 1524 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 1525 qede_ptp_tx_ts(edev, skb); 1526 1527 /* Map skb linear data for DMA and set in the first BD */ 1528 mapping = dma_map_single(txq->dev, skb->data, 1529 skb_headlen(skb), DMA_TO_DEVICE); 1530 if (unlikely(dma_mapping_error(txq->dev, mapping))) { 1531 DP_NOTICE(edev, "SKB mapping failed\n"); 1532 qede_free_failed_tx_pkt(txq, first_bd, 0, false); 1533 qede_update_tx_producer(txq); 1534 return NETDEV_TX_OK; 1535 } 1536 nbd++; 1537 BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb)); 1538 1539 /* In case there is IPv6 with extension headers or LSO we need 2nd and 1540 * 3rd BDs. 1541 */ 1542 if (unlikely((xmit_type & XMIT_LSO) | ipv6_ext)) { 1543 second_bd = (struct eth_tx_2nd_bd *) 1544 qed_chain_produce(&txq->tx_pbl); 1545 memset(second_bd, 0, sizeof(*second_bd)); 1546 1547 nbd++; 1548 third_bd = (struct eth_tx_3rd_bd *) 1549 qed_chain_produce(&txq->tx_pbl); 1550 memset(third_bd, 0, sizeof(*third_bd)); 1551 1552 nbd++; 1553 /* We need to fill in additional data in second_bd... */ 1554 tx_data_bd = (struct eth_tx_bd *)second_bd; 1555 } 1556 1557 if (skb_vlan_tag_present(skb)) { 1558 first_bd->data.vlan = cpu_to_le16(skb_vlan_tag_get(skb)); 1559 first_bd->data.bd_flags.bitfields |= 1560 1 << ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT; 1561 } 1562 1563 /* Fill the parsing flags & params according to the requested offload */ 1564 if (xmit_type & XMIT_L4_CSUM) { 1565 /* We don't re-calculate IP checksum as it is already done by 1566 * the upper stack 1567 */ 1568 first_bd->data.bd_flags.bitfields |= 1569 1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT; 1570 1571 if (xmit_type & XMIT_ENC) { 1572 first_bd->data.bd_flags.bitfields |= 1573 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; 1574 1575 val |= (1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT); 1576 } 1577 1578 /* Legacy FW had flipped behavior in regard to this bit - 1579 * I.e., needed to set to prevent FW from touching encapsulated 1580 * packets when it didn't need to. 1581 */ 1582 if (unlikely(txq->is_legacy)) 1583 val ^= (1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT); 1584 1585 /* If the packet is IPv6 with extension header, indicate that 1586 * to FW and pass few params, since the device cracker doesn't 1587 * support parsing IPv6 with extension header/s. 1588 */ 1589 if (unlikely(ipv6_ext)) 1590 qede_set_params_for_ipv6_ext(skb, second_bd, third_bd); 1591 } 1592 1593 if (xmit_type & XMIT_LSO) { 1594 first_bd->data.bd_flags.bitfields |= 1595 (1 << ETH_TX_1ST_BD_FLAGS_LSO_SHIFT); 1596 third_bd->data.lso_mss = 1597 cpu_to_le16(skb_shinfo(skb)->gso_size); 1598 1599 if (unlikely(xmit_type & XMIT_ENC)) { 1600 first_bd->data.bd_flags.bitfields |= 1601 1 << ETH_TX_1ST_BD_FLAGS_TUNN_IP_CSUM_SHIFT; 1602 1603 if (xmit_type & XMIT_ENC_GSO_L4_CSUM) { 1604 u8 tmp = ETH_TX_1ST_BD_FLAGS_TUNN_L4_CSUM_SHIFT; 1605 1606 first_bd->data.bd_flags.bitfields |= 1 << tmp; 1607 } 1608 hlen = qede_get_skb_hlen(skb, true); 1609 } else { 1610 first_bd->data.bd_flags.bitfields |= 1611 1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; 1612 hlen = qede_get_skb_hlen(skb, false); 1613 } 1614 1615 /* @@@TBD - if will not be removed need to check */ 1616 third_bd->data.bitfields |= 1617 cpu_to_le16(1 << ETH_TX_DATA_3RD_BD_HDR_NBD_SHIFT); 1618 1619 /* Make life easier for FW guys who can't deal with header and 1620 * data on same BD. If we need to split, use the second bd... 1621 */ 1622 if (unlikely(skb_headlen(skb) > hlen)) { 1623 DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, 1624 "TSO split header size is %d (%x:%x)\n", 1625 first_bd->nbytes, first_bd->addr.hi, 1626 first_bd->addr.lo); 1627 1628 mapping = HILO_U64(le32_to_cpu(first_bd->addr.hi), 1629 le32_to_cpu(first_bd->addr.lo)) + 1630 hlen; 1631 1632 BD_SET_UNMAP_ADDR_LEN(tx_data_bd, mapping, 1633 le16_to_cpu(first_bd->nbytes) - 1634 hlen); 1635 1636 /* this marks the BD as one that has no 1637 * individual mapping 1638 */ 1639 txq->sw_tx_ring.skbs[idx].flags |= QEDE_TSO_SPLIT_BD; 1640 1641 first_bd->nbytes = cpu_to_le16(hlen); 1642 1643 tx_data_bd = (struct eth_tx_bd *)third_bd; 1644 data_split = true; 1645 } 1646 } else { 1647 if (unlikely(skb->len > ETH_TX_MAX_NON_LSO_PKT_LEN)) { 1648 DP_ERR(edev, "Unexpected non LSO skb length = 0x%x\n", skb->len); 1649 qede_free_failed_tx_pkt(txq, first_bd, 0, false); 1650 qede_update_tx_producer(txq); 1651 return NETDEV_TX_OK; 1652 } 1653 1654 val |= ((skb->len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << 1655 ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT); 1656 } 1657 1658 first_bd->data.bitfields = cpu_to_le16(val); 1659 1660 /* Handle fragmented skb */ 1661 /* special handle for frags inside 2nd and 3rd bds.. */ 1662 while (tx_data_bd && frag_idx < skb_shinfo(skb)->nr_frags) { 1663 rc = map_frag_to_bd(txq, 1664 &skb_shinfo(skb)->frags[frag_idx], 1665 tx_data_bd); 1666 if (rc) { 1667 qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); 1668 qede_update_tx_producer(txq); 1669 return NETDEV_TX_OK; 1670 } 1671 1672 if (tx_data_bd == (struct eth_tx_bd *)second_bd) 1673 tx_data_bd = (struct eth_tx_bd *)third_bd; 1674 else 1675 tx_data_bd = NULL; 1676 1677 frag_idx++; 1678 } 1679 1680 /* map last frags into 4th, 5th .... */ 1681 for (; frag_idx < skb_shinfo(skb)->nr_frags; frag_idx++, nbd++) { 1682 tx_data_bd = (struct eth_tx_bd *) 1683 qed_chain_produce(&txq->tx_pbl); 1684 1685 memset(tx_data_bd, 0, sizeof(*tx_data_bd)); 1686 1687 rc = map_frag_to_bd(txq, 1688 &skb_shinfo(skb)->frags[frag_idx], 1689 tx_data_bd); 1690 if (rc) { 1691 qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); 1692 qede_update_tx_producer(txq); 1693 return NETDEV_TX_OK; 1694 } 1695 } 1696 1697 /* update the first BD with the actual num BDs */ 1698 first_bd->data.nbds = nbd; 1699 1700 netdev_tx_sent_queue(netdev_txq, skb->len); 1701 1702 skb_tx_timestamp(skb); 1703 1704 /* Advance packet producer only before sending the packet since mapping 1705 * of pages may fail. 1706 */ 1707 txq->sw_tx_prod = (txq->sw_tx_prod + 1) % txq->num_tx_buffers; 1708 1709 /* 'next page' entries are counted in the producer value */ 1710 txq->tx_db.data.bd_prod = 1711 cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl)); 1712 1713 if (!netdev_xmit_more() || netif_xmit_stopped(netdev_txq)) 1714 qede_update_tx_producer(txq); 1715 1716 if (unlikely(qed_chain_get_elem_left(&txq->tx_pbl) 1717 < (MAX_SKB_FRAGS + 1))) { 1718 if (netdev_xmit_more()) 1719 qede_update_tx_producer(txq); 1720 1721 netif_tx_stop_queue(netdev_txq); 1722 txq->stopped_cnt++; 1723 DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, 1724 "Stop queue was called\n"); 1725 /* paired memory barrier is in qede_tx_int(), we have to keep 1726 * ordering of set_bit() in netif_tx_stop_queue() and read of 1727 * fp->bd_tx_cons 1728 */ 1729 smp_mb(); 1730 1731 if ((qed_chain_get_elem_left(&txq->tx_pbl) >= 1732 (MAX_SKB_FRAGS + 1)) && 1733 (edev->state == QEDE_STATE_OPEN)) { 1734 netif_tx_wake_queue(netdev_txq); 1735 DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, 1736 "Wake queue was called\n"); 1737 } 1738 } 1739 1740 return NETDEV_TX_OK; 1741 } 1742 1743 u16 qede_select_queue(struct net_device *dev, struct sk_buff *skb, 1744 struct net_device *sb_dev) 1745 { 1746 struct qede_dev *edev = netdev_priv(dev); 1747 int total_txq; 1748 1749 total_txq = QEDE_TSS_COUNT(edev) * edev->dev_info.num_tc; 1750 1751 return QEDE_TSS_COUNT(edev) ? 1752 netdev_pick_tx(dev, skb, NULL) % total_txq : 0; 1753 } 1754 1755 /* 8B udp header + 8B base tunnel header + 32B option length */ 1756 #define QEDE_MAX_TUN_HDR_LEN 48 1757 1758 netdev_features_t qede_features_check(struct sk_buff *skb, 1759 struct net_device *dev, 1760 netdev_features_t features) 1761 { 1762 if (skb->encapsulation) { 1763 u8 l4_proto = 0; 1764 1765 switch (vlan_get_protocol(skb)) { 1766 case htons(ETH_P_IP): 1767 l4_proto = ip_hdr(skb)->protocol; 1768 break; 1769 case htons(ETH_P_IPV6): 1770 l4_proto = ipv6_hdr(skb)->nexthdr; 1771 break; 1772 default: 1773 return features; 1774 } 1775 1776 /* Disable offloads for geneve tunnels, as HW can't parse 1777 * the geneve header which has option length greater than 32b 1778 * and disable offloads for the ports which are not offloaded. 1779 */ 1780 if (l4_proto == IPPROTO_UDP) { 1781 struct qede_dev *edev = netdev_priv(dev); 1782 u16 hdrlen, vxln_port, gnv_port; 1783 1784 hdrlen = QEDE_MAX_TUN_HDR_LEN; 1785 vxln_port = edev->vxlan_dst_port; 1786 gnv_port = edev->geneve_dst_port; 1787 1788 if ((skb_inner_mac_header(skb) - 1789 skb_transport_header(skb)) > hdrlen || 1790 (ntohs(udp_hdr(skb)->dest) != vxln_port && 1791 ntohs(udp_hdr(skb)->dest) != gnv_port)) 1792 return features & ~(NETIF_F_CSUM_MASK | 1793 NETIF_F_GSO_MASK); 1794 } else if (l4_proto == IPPROTO_IPIP) { 1795 /* IPIP tunnels are unknown to the device or at least unsupported natively, 1796 * offloads for them can't be done trivially, so disable them for such skb. 1797 */ 1798 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 1799 } 1800 } 1801 1802 return features; 1803 } 1804