1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2018 Intel Corporation. */ 3 4 #include <linux/bpf_trace.h> 5 #include <net/xdp_sock.h> 6 #include <net/xdp.h> 7 8 #include "ixgbe.h" 9 #include "ixgbe_txrx_common.h" 10 11 struct xdp_umem *ixgbe_xsk_umem(struct ixgbe_adapter *adapter, 12 struct ixgbe_ring *ring) 13 { 14 bool xdp_on = READ_ONCE(adapter->xdp_prog); 15 int qid = ring->ring_idx; 16 17 if (!adapter->xsk_umems || !adapter->xsk_umems[qid] || 18 qid >= adapter->num_xsk_umems || !xdp_on) 19 return NULL; 20 21 return adapter->xsk_umems[qid]; 22 } 23 24 static int ixgbe_alloc_xsk_umems(struct ixgbe_adapter *adapter) 25 { 26 if (adapter->xsk_umems) 27 return 0; 28 29 adapter->num_xsk_umems_used = 0; 30 adapter->num_xsk_umems = adapter->num_rx_queues; 31 adapter->xsk_umems = kcalloc(adapter->num_xsk_umems, 32 sizeof(*adapter->xsk_umems), 33 GFP_KERNEL); 34 if (!adapter->xsk_umems) { 35 adapter->num_xsk_umems = 0; 36 return -ENOMEM; 37 } 38 39 return 0; 40 } 41 42 static int ixgbe_add_xsk_umem(struct ixgbe_adapter *adapter, 43 struct xdp_umem *umem, 44 u16 qid) 45 { 46 int err; 47 48 err = ixgbe_alloc_xsk_umems(adapter); 49 if (err) 50 return err; 51 52 adapter->xsk_umems[qid] = umem; 53 adapter->num_xsk_umems_used++; 54 55 return 0; 56 } 57 58 static void ixgbe_remove_xsk_umem(struct ixgbe_adapter *adapter, u16 qid) 59 { 60 adapter->xsk_umems[qid] = NULL; 61 adapter->num_xsk_umems_used--; 62 63 if (adapter->num_xsk_umems == 0) { 64 kfree(adapter->xsk_umems); 65 adapter->xsk_umems = NULL; 66 adapter->num_xsk_umems = 0; 67 } 68 } 69 70 static int ixgbe_xsk_umem_dma_map(struct ixgbe_adapter *adapter, 71 struct xdp_umem *umem) 72 { 73 struct device *dev = &adapter->pdev->dev; 74 unsigned int i, j; 75 dma_addr_t dma; 76 77 for (i = 0; i < umem->npgs; i++) { 78 dma = dma_map_page_attrs(dev, umem->pgs[i], 0, PAGE_SIZE, 79 DMA_BIDIRECTIONAL, IXGBE_RX_DMA_ATTR); 80 if (dma_mapping_error(dev, dma)) 81 goto out_unmap; 82 83 umem->pages[i].dma = dma; 84 } 85 86 return 0; 87 88 out_unmap: 89 for (j = 0; j < i; j++) { 90 dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE, 91 DMA_BIDIRECTIONAL, IXGBE_RX_DMA_ATTR); 92 umem->pages[i].dma = 0; 93 } 94 95 return -1; 96 } 97 98 static void ixgbe_xsk_umem_dma_unmap(struct ixgbe_adapter *adapter, 99 struct xdp_umem *umem) 100 { 101 struct device *dev = &adapter->pdev->dev; 102 unsigned int i; 103 104 for (i = 0; i < umem->npgs; i++) { 105 dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE, 106 DMA_BIDIRECTIONAL, IXGBE_RX_DMA_ATTR); 107 108 umem->pages[i].dma = 0; 109 } 110 } 111 112 static int ixgbe_xsk_umem_enable(struct ixgbe_adapter *adapter, 113 struct xdp_umem *umem, 114 u16 qid) 115 { 116 struct xdp_umem_fq_reuse *reuseq; 117 bool if_running; 118 int err; 119 120 if (qid >= adapter->num_rx_queues) 121 return -EINVAL; 122 123 if (adapter->xsk_umems) { 124 if (qid >= adapter->num_xsk_umems) 125 return -EINVAL; 126 if (adapter->xsk_umems[qid]) 127 return -EBUSY; 128 } 129 130 reuseq = xsk_reuseq_prepare(adapter->rx_ring[0]->count); 131 if (!reuseq) 132 return -ENOMEM; 133 134 xsk_reuseq_free(xsk_reuseq_swap(umem, reuseq)); 135 136 err = ixgbe_xsk_umem_dma_map(adapter, umem); 137 if (err) 138 return err; 139 140 if_running = netif_running(adapter->netdev) && 141 READ_ONCE(adapter->xdp_prog); 142 143 if (if_running) 144 ixgbe_txrx_ring_disable(adapter, qid); 145 146 err = ixgbe_add_xsk_umem(adapter, umem, qid); 147 148 if (if_running) 149 ixgbe_txrx_ring_enable(adapter, qid); 150 151 return err; 152 } 153 154 static int ixgbe_xsk_umem_disable(struct ixgbe_adapter *adapter, u16 qid) 155 { 156 bool if_running; 157 158 if (!adapter->xsk_umems || qid >= adapter->num_xsk_umems || 159 !adapter->xsk_umems[qid]) 160 return -EINVAL; 161 162 if_running = netif_running(adapter->netdev) && 163 READ_ONCE(adapter->xdp_prog); 164 165 if (if_running) 166 ixgbe_txrx_ring_disable(adapter, qid); 167 168 ixgbe_xsk_umem_dma_unmap(adapter, adapter->xsk_umems[qid]); 169 ixgbe_remove_xsk_umem(adapter, qid); 170 171 if (if_running) 172 ixgbe_txrx_ring_enable(adapter, qid); 173 174 return 0; 175 } 176 177 int ixgbe_xsk_umem_setup(struct ixgbe_adapter *adapter, struct xdp_umem *umem, 178 u16 qid) 179 { 180 return umem ? ixgbe_xsk_umem_enable(adapter, umem, qid) : 181 ixgbe_xsk_umem_disable(adapter, qid); 182 } 183 184 static int ixgbe_run_xdp_zc(struct ixgbe_adapter *adapter, 185 struct ixgbe_ring *rx_ring, 186 struct xdp_buff *xdp) 187 { 188 int err, result = IXGBE_XDP_PASS; 189 struct bpf_prog *xdp_prog; 190 struct xdp_frame *xdpf; 191 u32 act; 192 193 rcu_read_lock(); 194 xdp_prog = READ_ONCE(rx_ring->xdp_prog); 195 act = bpf_prog_run_xdp(xdp_prog, xdp); 196 xdp->handle += xdp->data - xdp->data_hard_start; 197 switch (act) { 198 case XDP_PASS: 199 break; 200 case XDP_TX: 201 xdpf = convert_to_xdp_frame(xdp); 202 if (unlikely(!xdpf)) { 203 result = IXGBE_XDP_CONSUMED; 204 break; 205 } 206 result = ixgbe_xmit_xdp_ring(adapter, xdpf); 207 break; 208 case XDP_REDIRECT: 209 err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); 210 result = !err ? IXGBE_XDP_REDIR : IXGBE_XDP_CONSUMED; 211 break; 212 default: 213 bpf_warn_invalid_xdp_action(act); 214 /* fallthrough */ 215 case XDP_ABORTED: 216 trace_xdp_exception(rx_ring->netdev, xdp_prog, act); 217 /* fallthrough -- handle aborts by dropping packet */ 218 case XDP_DROP: 219 result = IXGBE_XDP_CONSUMED; 220 break; 221 } 222 rcu_read_unlock(); 223 return result; 224 } 225 226 static struct 227 ixgbe_rx_buffer *ixgbe_get_rx_buffer_zc(struct ixgbe_ring *rx_ring, 228 unsigned int size) 229 { 230 struct ixgbe_rx_buffer *bi; 231 232 bi = &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; 233 234 /* we are reusing so sync this buffer for CPU use */ 235 dma_sync_single_range_for_cpu(rx_ring->dev, 236 bi->dma, 0, 237 size, 238 DMA_BIDIRECTIONAL); 239 240 return bi; 241 } 242 243 static void ixgbe_reuse_rx_buffer_zc(struct ixgbe_ring *rx_ring, 244 struct ixgbe_rx_buffer *obi) 245 { 246 unsigned long mask = (unsigned long)rx_ring->xsk_umem->chunk_mask; 247 u64 hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM; 248 u16 nta = rx_ring->next_to_alloc; 249 struct ixgbe_rx_buffer *nbi; 250 251 nbi = &rx_ring->rx_buffer_info[rx_ring->next_to_alloc]; 252 /* update, and store next to alloc */ 253 nta++; 254 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; 255 256 /* transfer page from old buffer to new buffer */ 257 nbi->dma = obi->dma & mask; 258 nbi->dma += hr; 259 260 nbi->addr = (void *)((unsigned long)obi->addr & mask); 261 nbi->addr += hr; 262 263 nbi->handle = obi->handle & mask; 264 nbi->handle += rx_ring->xsk_umem->headroom; 265 266 obi->addr = NULL; 267 obi->skb = NULL; 268 } 269 270 void ixgbe_zca_free(struct zero_copy_allocator *alloc, unsigned long handle) 271 { 272 struct ixgbe_rx_buffer *bi; 273 struct ixgbe_ring *rx_ring; 274 u64 hr, mask; 275 u16 nta; 276 277 rx_ring = container_of(alloc, struct ixgbe_ring, zca); 278 hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM; 279 mask = rx_ring->xsk_umem->chunk_mask; 280 281 nta = rx_ring->next_to_alloc; 282 bi = rx_ring->rx_buffer_info; 283 284 nta++; 285 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; 286 287 handle &= mask; 288 289 bi->dma = xdp_umem_get_dma(rx_ring->xsk_umem, handle); 290 bi->dma += hr; 291 292 bi->addr = xdp_umem_get_data(rx_ring->xsk_umem, handle); 293 bi->addr += hr; 294 295 bi->handle = (u64)handle + rx_ring->xsk_umem->headroom; 296 } 297 298 static bool ixgbe_alloc_buffer_zc(struct ixgbe_ring *rx_ring, 299 struct ixgbe_rx_buffer *bi) 300 { 301 struct xdp_umem *umem = rx_ring->xsk_umem; 302 void *addr = bi->addr; 303 u64 handle, hr; 304 305 if (addr) 306 return true; 307 308 if (!xsk_umem_peek_addr(umem, &handle)) { 309 rx_ring->rx_stats.alloc_rx_page_failed++; 310 return false; 311 } 312 313 hr = umem->headroom + XDP_PACKET_HEADROOM; 314 315 bi->dma = xdp_umem_get_dma(umem, handle); 316 bi->dma += hr; 317 318 bi->addr = xdp_umem_get_data(umem, handle); 319 bi->addr += hr; 320 321 bi->handle = handle + umem->headroom; 322 323 xsk_umem_discard_addr(umem); 324 return true; 325 } 326 327 static bool ixgbe_alloc_buffer_slow_zc(struct ixgbe_ring *rx_ring, 328 struct ixgbe_rx_buffer *bi) 329 { 330 struct xdp_umem *umem = rx_ring->xsk_umem; 331 u64 handle, hr; 332 333 if (!xsk_umem_peek_addr_rq(umem, &handle)) { 334 rx_ring->rx_stats.alloc_rx_page_failed++; 335 return false; 336 } 337 338 handle &= rx_ring->xsk_umem->chunk_mask; 339 340 hr = umem->headroom + XDP_PACKET_HEADROOM; 341 342 bi->dma = xdp_umem_get_dma(umem, handle); 343 bi->dma += hr; 344 345 bi->addr = xdp_umem_get_data(umem, handle); 346 bi->addr += hr; 347 348 bi->handle = handle + umem->headroom; 349 350 xsk_umem_discard_addr_rq(umem); 351 return true; 352 } 353 354 static __always_inline bool 355 __ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count, 356 bool alloc(struct ixgbe_ring *rx_ring, 357 struct ixgbe_rx_buffer *bi)) 358 { 359 union ixgbe_adv_rx_desc *rx_desc; 360 struct ixgbe_rx_buffer *bi; 361 u16 i = rx_ring->next_to_use; 362 bool ok = true; 363 364 /* nothing to do */ 365 if (!cleaned_count) 366 return true; 367 368 rx_desc = IXGBE_RX_DESC(rx_ring, i); 369 bi = &rx_ring->rx_buffer_info[i]; 370 i -= rx_ring->count; 371 372 do { 373 if (!alloc(rx_ring, bi)) { 374 ok = false; 375 break; 376 } 377 378 /* sync the buffer for use by the device */ 379 dma_sync_single_range_for_device(rx_ring->dev, bi->dma, 380 bi->page_offset, 381 rx_ring->rx_buf_len, 382 DMA_BIDIRECTIONAL); 383 384 /* Refresh the desc even if buffer_addrs didn't change 385 * because each write-back erases this info. 386 */ 387 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma); 388 389 rx_desc++; 390 bi++; 391 i++; 392 if (unlikely(!i)) { 393 rx_desc = IXGBE_RX_DESC(rx_ring, 0); 394 bi = rx_ring->rx_buffer_info; 395 i -= rx_ring->count; 396 } 397 398 /* clear the length for the next_to_use descriptor */ 399 rx_desc->wb.upper.length = 0; 400 401 cleaned_count--; 402 } while (cleaned_count); 403 404 i += rx_ring->count; 405 406 if (rx_ring->next_to_use != i) { 407 rx_ring->next_to_use = i; 408 409 /* update next to alloc since we have filled the ring */ 410 rx_ring->next_to_alloc = i; 411 412 /* Force memory writes to complete before letting h/w 413 * know there are new descriptors to fetch. (Only 414 * applicable for weak-ordered memory model archs, 415 * such as IA-64). 416 */ 417 wmb(); 418 writel(i, rx_ring->tail); 419 } 420 421 return ok; 422 } 423 424 void ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 count) 425 { 426 __ixgbe_alloc_rx_buffers_zc(rx_ring, count, 427 ixgbe_alloc_buffer_slow_zc); 428 } 429 430 static bool ixgbe_alloc_rx_buffers_fast_zc(struct ixgbe_ring *rx_ring, 431 u16 count) 432 { 433 return __ixgbe_alloc_rx_buffers_zc(rx_ring, count, 434 ixgbe_alloc_buffer_zc); 435 } 436 437 static struct sk_buff *ixgbe_construct_skb_zc(struct ixgbe_ring *rx_ring, 438 struct ixgbe_rx_buffer *bi, 439 struct xdp_buff *xdp) 440 { 441 unsigned int metasize = xdp->data - xdp->data_meta; 442 unsigned int datasize = xdp->data_end - xdp->data; 443 struct sk_buff *skb; 444 445 /* allocate a skb to store the frags */ 446 skb = __napi_alloc_skb(&rx_ring->q_vector->napi, 447 xdp->data_end - xdp->data_hard_start, 448 GFP_ATOMIC | __GFP_NOWARN); 449 if (unlikely(!skb)) 450 return NULL; 451 452 skb_reserve(skb, xdp->data - xdp->data_hard_start); 453 memcpy(__skb_put(skb, datasize), xdp->data, datasize); 454 if (metasize) 455 skb_metadata_set(skb, metasize); 456 457 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 458 return skb; 459 } 460 461 static void ixgbe_inc_ntc(struct ixgbe_ring *rx_ring) 462 { 463 u32 ntc = rx_ring->next_to_clean + 1; 464 465 ntc = (ntc < rx_ring->count) ? ntc : 0; 466 rx_ring->next_to_clean = ntc; 467 prefetch(IXGBE_RX_DESC(rx_ring, ntc)); 468 } 469 470 int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector, 471 struct ixgbe_ring *rx_ring, 472 const int budget) 473 { 474 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 475 struct ixgbe_adapter *adapter = q_vector->adapter; 476 u16 cleaned_count = ixgbe_desc_unused(rx_ring); 477 unsigned int xdp_res, xdp_xmit = 0; 478 bool failure = false; 479 struct sk_buff *skb; 480 struct xdp_buff xdp; 481 482 xdp.rxq = &rx_ring->xdp_rxq; 483 484 while (likely(total_rx_packets < budget)) { 485 union ixgbe_adv_rx_desc *rx_desc; 486 struct ixgbe_rx_buffer *bi; 487 unsigned int size; 488 489 /* return some buffers to hardware, one at a time is too slow */ 490 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) { 491 failure = failure || 492 !ixgbe_alloc_rx_buffers_fast_zc(rx_ring, 493 cleaned_count); 494 cleaned_count = 0; 495 } 496 497 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean); 498 size = le16_to_cpu(rx_desc->wb.upper.length); 499 if (!size) 500 break; 501 502 /* This memory barrier is needed to keep us from reading 503 * any other fields out of the rx_desc until we know the 504 * descriptor has been written back 505 */ 506 dma_rmb(); 507 508 bi = ixgbe_get_rx_buffer_zc(rx_ring, size); 509 510 if (unlikely(!ixgbe_test_staterr(rx_desc, 511 IXGBE_RXD_STAT_EOP))) { 512 struct ixgbe_rx_buffer *next_bi; 513 514 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 515 ixgbe_inc_ntc(rx_ring); 516 next_bi = 517 &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; 518 next_bi->skb = ERR_PTR(-EINVAL); 519 continue; 520 } 521 522 if (unlikely(bi->skb)) { 523 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 524 ixgbe_inc_ntc(rx_ring); 525 continue; 526 } 527 528 xdp.data = bi->addr; 529 xdp.data_meta = xdp.data; 530 xdp.data_hard_start = xdp.data - XDP_PACKET_HEADROOM; 531 xdp.data_end = xdp.data + size; 532 xdp.handle = bi->handle; 533 534 xdp_res = ixgbe_run_xdp_zc(adapter, rx_ring, &xdp); 535 536 if (xdp_res) { 537 if (xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR)) { 538 xdp_xmit |= xdp_res; 539 bi->addr = NULL; 540 bi->skb = NULL; 541 } else { 542 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 543 } 544 total_rx_packets++; 545 total_rx_bytes += size; 546 547 cleaned_count++; 548 ixgbe_inc_ntc(rx_ring); 549 continue; 550 } 551 552 /* XDP_PASS path */ 553 skb = ixgbe_construct_skb_zc(rx_ring, bi, &xdp); 554 if (!skb) { 555 rx_ring->rx_stats.alloc_rx_buff_failed++; 556 break; 557 } 558 559 cleaned_count++; 560 ixgbe_inc_ntc(rx_ring); 561 562 if (eth_skb_pad(skb)) 563 continue; 564 565 total_rx_bytes += skb->len; 566 total_rx_packets++; 567 568 ixgbe_process_skb_fields(rx_ring, rx_desc, skb); 569 ixgbe_rx_skb(q_vector, skb); 570 } 571 572 if (xdp_xmit & IXGBE_XDP_REDIR) 573 xdp_do_flush_map(); 574 575 if (xdp_xmit & IXGBE_XDP_TX) { 576 struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()]; 577 578 /* Force memory writes to complete before letting h/w 579 * know there are new descriptors to fetch. 580 */ 581 wmb(); 582 writel(ring->next_to_use, ring->tail); 583 } 584 585 u64_stats_update_begin(&rx_ring->syncp); 586 rx_ring->stats.packets += total_rx_packets; 587 rx_ring->stats.bytes += total_rx_bytes; 588 u64_stats_update_end(&rx_ring->syncp); 589 q_vector->rx.total_packets += total_rx_packets; 590 q_vector->rx.total_bytes += total_rx_bytes; 591 592 return failure ? budget : (int)total_rx_packets; 593 } 594 595 void ixgbe_xsk_clean_rx_ring(struct ixgbe_ring *rx_ring) 596 { 597 u16 i = rx_ring->next_to_clean; 598 struct ixgbe_rx_buffer *bi = &rx_ring->rx_buffer_info[i]; 599 600 while (i != rx_ring->next_to_alloc) { 601 xsk_umem_fq_reuse(rx_ring->xsk_umem, bi->handle); 602 i++; 603 bi++; 604 if (i == rx_ring->count) { 605 i = 0; 606 bi = rx_ring->rx_buffer_info; 607 } 608 } 609 } 610 611 static bool ixgbe_xmit_zc(struct ixgbe_ring *xdp_ring, unsigned int budget) 612 { 613 union ixgbe_adv_tx_desc *tx_desc = NULL; 614 struct ixgbe_tx_buffer *tx_bi; 615 bool work_done = true; 616 u32 len, cmd_type; 617 dma_addr_t dma; 618 619 while (budget-- > 0) { 620 if (unlikely(!ixgbe_desc_unused(xdp_ring))) { 621 work_done = false; 622 break; 623 } 624 625 if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &dma, &len)) 626 break; 627 628 dma_sync_single_for_device(xdp_ring->dev, dma, len, 629 DMA_BIDIRECTIONAL); 630 631 tx_bi = &xdp_ring->tx_buffer_info[xdp_ring->next_to_use]; 632 tx_bi->bytecount = len; 633 tx_bi->xdpf = NULL; 634 635 tx_desc = IXGBE_TX_DESC(xdp_ring, xdp_ring->next_to_use); 636 tx_desc->read.buffer_addr = cpu_to_le64(dma); 637 638 /* put descriptor type bits */ 639 cmd_type = IXGBE_ADVTXD_DTYP_DATA | 640 IXGBE_ADVTXD_DCMD_DEXT | 641 IXGBE_ADVTXD_DCMD_IFCS; 642 cmd_type |= len | IXGBE_TXD_CMD; 643 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type); 644 tx_desc->read.olinfo_status = 645 cpu_to_le32(len << IXGBE_ADVTXD_PAYLEN_SHIFT); 646 647 xdp_ring->next_to_use++; 648 if (xdp_ring->next_to_use == xdp_ring->count) 649 xdp_ring->next_to_use = 0; 650 } 651 652 if (tx_desc) { 653 ixgbe_xdp_ring_update_tail(xdp_ring); 654 xsk_umem_consume_tx_done(xdp_ring->xsk_umem); 655 } 656 657 return !!budget && work_done; 658 } 659 660 static void ixgbe_clean_xdp_tx_buffer(struct ixgbe_ring *tx_ring, 661 struct ixgbe_tx_buffer *tx_bi) 662 { 663 xdp_return_frame(tx_bi->xdpf); 664 dma_unmap_single(tx_ring->dev, 665 dma_unmap_addr(tx_bi, dma), 666 dma_unmap_len(tx_bi, len), DMA_TO_DEVICE); 667 dma_unmap_len_set(tx_bi, len, 0); 668 } 669 670 bool ixgbe_clean_xdp_tx_irq(struct ixgbe_q_vector *q_vector, 671 struct ixgbe_ring *tx_ring, int napi_budget) 672 { 673 unsigned int total_packets = 0, total_bytes = 0; 674 u32 i = tx_ring->next_to_clean, xsk_frames = 0; 675 unsigned int budget = q_vector->tx.work_limit; 676 struct xdp_umem *umem = tx_ring->xsk_umem; 677 union ixgbe_adv_tx_desc *tx_desc; 678 struct ixgbe_tx_buffer *tx_bi; 679 bool xmit_done; 680 681 tx_bi = &tx_ring->tx_buffer_info[i]; 682 tx_desc = IXGBE_TX_DESC(tx_ring, i); 683 i -= tx_ring->count; 684 685 do { 686 if (!(tx_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD))) 687 break; 688 689 total_bytes += tx_bi->bytecount; 690 total_packets += tx_bi->gso_segs; 691 692 if (tx_bi->xdpf) 693 ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi); 694 else 695 xsk_frames++; 696 697 tx_bi->xdpf = NULL; 698 total_bytes += tx_bi->bytecount; 699 700 tx_bi++; 701 tx_desc++; 702 i++; 703 if (unlikely(!i)) { 704 i -= tx_ring->count; 705 tx_bi = tx_ring->tx_buffer_info; 706 tx_desc = IXGBE_TX_DESC(tx_ring, 0); 707 } 708 709 /* issue prefetch for next Tx descriptor */ 710 prefetch(tx_desc); 711 712 /* update budget accounting */ 713 budget--; 714 } while (likely(budget)); 715 716 i += tx_ring->count; 717 tx_ring->next_to_clean = i; 718 719 u64_stats_update_begin(&tx_ring->syncp); 720 tx_ring->stats.bytes += total_bytes; 721 tx_ring->stats.packets += total_packets; 722 u64_stats_update_end(&tx_ring->syncp); 723 q_vector->tx.total_bytes += total_bytes; 724 q_vector->tx.total_packets += total_packets; 725 726 if (xsk_frames) 727 xsk_umem_complete_tx(umem, xsk_frames); 728 729 xmit_done = ixgbe_xmit_zc(tx_ring, q_vector->tx.work_limit); 730 return budget > 0 && xmit_done; 731 } 732 733 int ixgbe_xsk_async_xmit(struct net_device *dev, u32 qid) 734 { 735 struct ixgbe_adapter *adapter = netdev_priv(dev); 736 struct ixgbe_ring *ring; 737 738 if (test_bit(__IXGBE_DOWN, &adapter->state)) 739 return -ENETDOWN; 740 741 if (!READ_ONCE(adapter->xdp_prog)) 742 return -ENXIO; 743 744 if (qid >= adapter->num_xdp_queues) 745 return -ENXIO; 746 747 if (!adapter->xsk_umems || !adapter->xsk_umems[qid]) 748 return -ENXIO; 749 750 ring = adapter->xdp_ring[qid]; 751 if (!napi_if_scheduled_mark_missed(&ring->q_vector->napi)) { 752 u64 eics = BIT_ULL(ring->q_vector->v_idx); 753 754 ixgbe_irq_rearm_queues(adapter, eics); 755 } 756 757 return 0; 758 } 759 760 void ixgbe_xsk_clean_tx_ring(struct ixgbe_ring *tx_ring) 761 { 762 u16 ntc = tx_ring->next_to_clean, ntu = tx_ring->next_to_use; 763 struct xdp_umem *umem = tx_ring->xsk_umem; 764 struct ixgbe_tx_buffer *tx_bi; 765 u32 xsk_frames = 0; 766 767 while (ntc != ntu) { 768 tx_bi = &tx_ring->tx_buffer_info[ntc]; 769 770 if (tx_bi->xdpf) 771 ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi); 772 else 773 xsk_frames++; 774 775 tx_bi->xdpf = NULL; 776 777 ntc++; 778 if (ntc == tx_ring->count) 779 ntc = 0; 780 } 781 782 if (xsk_frames) 783 xsk_umem_complete_tx(umem, xsk_frames); 784 } 785