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_query(struct ixgbe_adapter *adapter, struct xdp_umem **umem, 178 u16 qid) 179 { 180 if (qid >= adapter->num_rx_queues) 181 return -EINVAL; 182 183 if (adapter->xsk_umems) { 184 if (qid >= adapter->num_xsk_umems) 185 return -EINVAL; 186 *umem = adapter->xsk_umems[qid]; 187 return 0; 188 } 189 190 *umem = NULL; 191 return 0; 192 } 193 194 int ixgbe_xsk_umem_setup(struct ixgbe_adapter *adapter, struct xdp_umem *umem, 195 u16 qid) 196 { 197 return umem ? ixgbe_xsk_umem_enable(adapter, umem, qid) : 198 ixgbe_xsk_umem_disable(adapter, qid); 199 } 200 201 static int ixgbe_run_xdp_zc(struct ixgbe_adapter *adapter, 202 struct ixgbe_ring *rx_ring, 203 struct xdp_buff *xdp) 204 { 205 int err, result = IXGBE_XDP_PASS; 206 struct bpf_prog *xdp_prog; 207 struct xdp_frame *xdpf; 208 u32 act; 209 210 rcu_read_lock(); 211 xdp_prog = READ_ONCE(rx_ring->xdp_prog); 212 act = bpf_prog_run_xdp(xdp_prog, xdp); 213 xdp->handle += xdp->data - xdp->data_hard_start; 214 switch (act) { 215 case XDP_PASS: 216 break; 217 case XDP_TX: 218 xdpf = convert_to_xdp_frame(xdp); 219 if (unlikely(!xdpf)) { 220 result = IXGBE_XDP_CONSUMED; 221 break; 222 } 223 result = ixgbe_xmit_xdp_ring(adapter, xdpf); 224 break; 225 case XDP_REDIRECT: 226 err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); 227 result = !err ? IXGBE_XDP_REDIR : IXGBE_XDP_CONSUMED; 228 break; 229 default: 230 bpf_warn_invalid_xdp_action(act); 231 /* fallthrough */ 232 case XDP_ABORTED: 233 trace_xdp_exception(rx_ring->netdev, xdp_prog, act); 234 /* fallthrough -- handle aborts by dropping packet */ 235 case XDP_DROP: 236 result = IXGBE_XDP_CONSUMED; 237 break; 238 } 239 rcu_read_unlock(); 240 return result; 241 } 242 243 static struct 244 ixgbe_rx_buffer *ixgbe_get_rx_buffer_zc(struct ixgbe_ring *rx_ring, 245 unsigned int size) 246 { 247 struct ixgbe_rx_buffer *bi; 248 249 bi = &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; 250 251 /* we are reusing so sync this buffer for CPU use */ 252 dma_sync_single_range_for_cpu(rx_ring->dev, 253 bi->dma, 0, 254 size, 255 DMA_BIDIRECTIONAL); 256 257 return bi; 258 } 259 260 static void ixgbe_reuse_rx_buffer_zc(struct ixgbe_ring *rx_ring, 261 struct ixgbe_rx_buffer *obi) 262 { 263 unsigned long mask = (unsigned long)rx_ring->xsk_umem->chunk_mask; 264 u64 hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM; 265 u16 nta = rx_ring->next_to_alloc; 266 struct ixgbe_rx_buffer *nbi; 267 268 nbi = &rx_ring->rx_buffer_info[rx_ring->next_to_alloc]; 269 /* update, and store next to alloc */ 270 nta++; 271 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; 272 273 /* transfer page from old buffer to new buffer */ 274 nbi->dma = obi->dma & mask; 275 nbi->dma += hr; 276 277 nbi->addr = (void *)((unsigned long)obi->addr & mask); 278 nbi->addr += hr; 279 280 nbi->handle = obi->handle & mask; 281 nbi->handle += rx_ring->xsk_umem->headroom; 282 283 obi->addr = NULL; 284 obi->skb = NULL; 285 } 286 287 void ixgbe_zca_free(struct zero_copy_allocator *alloc, unsigned long handle) 288 { 289 struct ixgbe_rx_buffer *bi; 290 struct ixgbe_ring *rx_ring; 291 u64 hr, mask; 292 u16 nta; 293 294 rx_ring = container_of(alloc, struct ixgbe_ring, zca); 295 hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM; 296 mask = rx_ring->xsk_umem->chunk_mask; 297 298 nta = rx_ring->next_to_alloc; 299 bi = rx_ring->rx_buffer_info; 300 301 nta++; 302 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; 303 304 handle &= mask; 305 306 bi->dma = xdp_umem_get_dma(rx_ring->xsk_umem, handle); 307 bi->dma += hr; 308 309 bi->addr = xdp_umem_get_data(rx_ring->xsk_umem, handle); 310 bi->addr += hr; 311 312 bi->handle = (u64)handle + rx_ring->xsk_umem->headroom; 313 } 314 315 static bool ixgbe_alloc_buffer_zc(struct ixgbe_ring *rx_ring, 316 struct ixgbe_rx_buffer *bi) 317 { 318 struct xdp_umem *umem = rx_ring->xsk_umem; 319 void *addr = bi->addr; 320 u64 handle, hr; 321 322 if (addr) 323 return true; 324 325 if (!xsk_umem_peek_addr(umem, &handle)) { 326 rx_ring->rx_stats.alloc_rx_page_failed++; 327 return false; 328 } 329 330 hr = umem->headroom + XDP_PACKET_HEADROOM; 331 332 bi->dma = xdp_umem_get_dma(umem, handle); 333 bi->dma += hr; 334 335 bi->addr = xdp_umem_get_data(umem, handle); 336 bi->addr += hr; 337 338 bi->handle = handle + umem->headroom; 339 340 xsk_umem_discard_addr(umem); 341 return true; 342 } 343 344 static bool ixgbe_alloc_buffer_slow_zc(struct ixgbe_ring *rx_ring, 345 struct ixgbe_rx_buffer *bi) 346 { 347 struct xdp_umem *umem = rx_ring->xsk_umem; 348 u64 handle, hr; 349 350 if (!xsk_umem_peek_addr_rq(umem, &handle)) { 351 rx_ring->rx_stats.alloc_rx_page_failed++; 352 return false; 353 } 354 355 handle &= rx_ring->xsk_umem->chunk_mask; 356 357 hr = umem->headroom + XDP_PACKET_HEADROOM; 358 359 bi->dma = xdp_umem_get_dma(umem, handle); 360 bi->dma += hr; 361 362 bi->addr = xdp_umem_get_data(umem, handle); 363 bi->addr += hr; 364 365 bi->handle = handle + umem->headroom; 366 367 xsk_umem_discard_addr_rq(umem); 368 return true; 369 } 370 371 static __always_inline bool 372 __ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count, 373 bool alloc(struct ixgbe_ring *rx_ring, 374 struct ixgbe_rx_buffer *bi)) 375 { 376 union ixgbe_adv_rx_desc *rx_desc; 377 struct ixgbe_rx_buffer *bi; 378 u16 i = rx_ring->next_to_use; 379 bool ok = true; 380 381 /* nothing to do */ 382 if (!cleaned_count) 383 return true; 384 385 rx_desc = IXGBE_RX_DESC(rx_ring, i); 386 bi = &rx_ring->rx_buffer_info[i]; 387 i -= rx_ring->count; 388 389 do { 390 if (!alloc(rx_ring, bi)) { 391 ok = false; 392 break; 393 } 394 395 /* sync the buffer for use by the device */ 396 dma_sync_single_range_for_device(rx_ring->dev, bi->dma, 397 bi->page_offset, 398 rx_ring->rx_buf_len, 399 DMA_BIDIRECTIONAL); 400 401 /* Refresh the desc even if buffer_addrs didn't change 402 * because each write-back erases this info. 403 */ 404 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma); 405 406 rx_desc++; 407 bi++; 408 i++; 409 if (unlikely(!i)) { 410 rx_desc = IXGBE_RX_DESC(rx_ring, 0); 411 bi = rx_ring->rx_buffer_info; 412 i -= rx_ring->count; 413 } 414 415 /* clear the length for the next_to_use descriptor */ 416 rx_desc->wb.upper.length = 0; 417 418 cleaned_count--; 419 } while (cleaned_count); 420 421 i += rx_ring->count; 422 423 if (rx_ring->next_to_use != i) { 424 rx_ring->next_to_use = i; 425 426 /* update next to alloc since we have filled the ring */ 427 rx_ring->next_to_alloc = i; 428 429 /* Force memory writes to complete before letting h/w 430 * know there are new descriptors to fetch. (Only 431 * applicable for weak-ordered memory model archs, 432 * such as IA-64). 433 */ 434 wmb(); 435 writel(i, rx_ring->tail); 436 } 437 438 return ok; 439 } 440 441 void ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 count) 442 { 443 __ixgbe_alloc_rx_buffers_zc(rx_ring, count, 444 ixgbe_alloc_buffer_slow_zc); 445 } 446 447 static bool ixgbe_alloc_rx_buffers_fast_zc(struct ixgbe_ring *rx_ring, 448 u16 count) 449 { 450 return __ixgbe_alloc_rx_buffers_zc(rx_ring, count, 451 ixgbe_alloc_buffer_zc); 452 } 453 454 static struct sk_buff *ixgbe_construct_skb_zc(struct ixgbe_ring *rx_ring, 455 struct ixgbe_rx_buffer *bi, 456 struct xdp_buff *xdp) 457 { 458 unsigned int metasize = xdp->data - xdp->data_meta; 459 unsigned int datasize = xdp->data_end - xdp->data; 460 struct sk_buff *skb; 461 462 /* allocate a skb to store the frags */ 463 skb = __napi_alloc_skb(&rx_ring->q_vector->napi, 464 xdp->data_end - xdp->data_hard_start, 465 GFP_ATOMIC | __GFP_NOWARN); 466 if (unlikely(!skb)) 467 return NULL; 468 469 skb_reserve(skb, xdp->data - xdp->data_hard_start); 470 memcpy(__skb_put(skb, datasize), xdp->data, datasize); 471 if (metasize) 472 skb_metadata_set(skb, metasize); 473 474 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 475 return skb; 476 } 477 478 static void ixgbe_inc_ntc(struct ixgbe_ring *rx_ring) 479 { 480 u32 ntc = rx_ring->next_to_clean + 1; 481 482 ntc = (ntc < rx_ring->count) ? ntc : 0; 483 rx_ring->next_to_clean = ntc; 484 prefetch(IXGBE_RX_DESC(rx_ring, ntc)); 485 } 486 487 int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector, 488 struct ixgbe_ring *rx_ring, 489 const int budget) 490 { 491 unsigned int total_rx_bytes = 0, total_rx_packets = 0; 492 struct ixgbe_adapter *adapter = q_vector->adapter; 493 u16 cleaned_count = ixgbe_desc_unused(rx_ring); 494 unsigned int xdp_res, xdp_xmit = 0; 495 bool failure = false; 496 struct sk_buff *skb; 497 struct xdp_buff xdp; 498 499 xdp.rxq = &rx_ring->xdp_rxq; 500 501 while (likely(total_rx_packets < budget)) { 502 union ixgbe_adv_rx_desc *rx_desc; 503 struct ixgbe_rx_buffer *bi; 504 unsigned int size; 505 506 /* return some buffers to hardware, one at a time is too slow */ 507 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) { 508 failure = failure || 509 !ixgbe_alloc_rx_buffers_fast_zc(rx_ring, 510 cleaned_count); 511 cleaned_count = 0; 512 } 513 514 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean); 515 size = le16_to_cpu(rx_desc->wb.upper.length); 516 if (!size) 517 break; 518 519 /* This memory barrier is needed to keep us from reading 520 * any other fields out of the rx_desc until we know the 521 * descriptor has been written back 522 */ 523 dma_rmb(); 524 525 bi = ixgbe_get_rx_buffer_zc(rx_ring, size); 526 527 if (unlikely(!ixgbe_test_staterr(rx_desc, 528 IXGBE_RXD_STAT_EOP))) { 529 struct ixgbe_rx_buffer *next_bi; 530 531 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 532 ixgbe_inc_ntc(rx_ring); 533 next_bi = 534 &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; 535 next_bi->skb = ERR_PTR(-EINVAL); 536 continue; 537 } 538 539 if (unlikely(bi->skb)) { 540 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 541 ixgbe_inc_ntc(rx_ring); 542 continue; 543 } 544 545 xdp.data = bi->addr; 546 xdp.data_meta = xdp.data; 547 xdp.data_hard_start = xdp.data - XDP_PACKET_HEADROOM; 548 xdp.data_end = xdp.data + size; 549 xdp.handle = bi->handle; 550 551 xdp_res = ixgbe_run_xdp_zc(adapter, rx_ring, &xdp); 552 553 if (xdp_res) { 554 if (xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR)) { 555 xdp_xmit |= xdp_res; 556 bi->addr = NULL; 557 bi->skb = NULL; 558 } else { 559 ixgbe_reuse_rx_buffer_zc(rx_ring, bi); 560 } 561 total_rx_packets++; 562 total_rx_bytes += size; 563 564 cleaned_count++; 565 ixgbe_inc_ntc(rx_ring); 566 continue; 567 } 568 569 /* XDP_PASS path */ 570 skb = ixgbe_construct_skb_zc(rx_ring, bi, &xdp); 571 if (!skb) { 572 rx_ring->rx_stats.alloc_rx_buff_failed++; 573 break; 574 } 575 576 cleaned_count++; 577 ixgbe_inc_ntc(rx_ring); 578 579 if (eth_skb_pad(skb)) 580 continue; 581 582 total_rx_bytes += skb->len; 583 total_rx_packets++; 584 585 ixgbe_process_skb_fields(rx_ring, rx_desc, skb); 586 ixgbe_rx_skb(q_vector, skb); 587 } 588 589 if (xdp_xmit & IXGBE_XDP_REDIR) 590 xdp_do_flush_map(); 591 592 if (xdp_xmit & IXGBE_XDP_TX) { 593 struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()]; 594 595 /* Force memory writes to complete before letting h/w 596 * know there are new descriptors to fetch. 597 */ 598 wmb(); 599 writel(ring->next_to_use, ring->tail); 600 } 601 602 u64_stats_update_begin(&rx_ring->syncp); 603 rx_ring->stats.packets += total_rx_packets; 604 rx_ring->stats.bytes += total_rx_bytes; 605 u64_stats_update_end(&rx_ring->syncp); 606 q_vector->rx.total_packets += total_rx_packets; 607 q_vector->rx.total_bytes += total_rx_bytes; 608 609 return failure ? budget : (int)total_rx_packets; 610 } 611 612 void ixgbe_xsk_clean_rx_ring(struct ixgbe_ring *rx_ring) 613 { 614 u16 i = rx_ring->next_to_clean; 615 struct ixgbe_rx_buffer *bi = &rx_ring->rx_buffer_info[i]; 616 617 while (i != rx_ring->next_to_alloc) { 618 xsk_umem_fq_reuse(rx_ring->xsk_umem, bi->handle); 619 i++; 620 bi++; 621 if (i == rx_ring->count) { 622 i = 0; 623 bi = rx_ring->rx_buffer_info; 624 } 625 } 626 } 627 628 static bool ixgbe_xmit_zc(struct ixgbe_ring *xdp_ring, unsigned int budget) 629 { 630 union ixgbe_adv_tx_desc *tx_desc = NULL; 631 struct ixgbe_tx_buffer *tx_bi; 632 bool work_done = true; 633 u32 len, cmd_type; 634 dma_addr_t dma; 635 636 while (budget-- > 0) { 637 if (unlikely(!ixgbe_desc_unused(xdp_ring))) { 638 work_done = false; 639 break; 640 } 641 642 if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &dma, &len)) 643 break; 644 645 dma_sync_single_for_device(xdp_ring->dev, dma, len, 646 DMA_BIDIRECTIONAL); 647 648 tx_bi = &xdp_ring->tx_buffer_info[xdp_ring->next_to_use]; 649 tx_bi->bytecount = len; 650 tx_bi->xdpf = NULL; 651 652 tx_desc = IXGBE_TX_DESC(xdp_ring, xdp_ring->next_to_use); 653 tx_desc->read.buffer_addr = cpu_to_le64(dma); 654 655 /* put descriptor type bits */ 656 cmd_type = IXGBE_ADVTXD_DTYP_DATA | 657 IXGBE_ADVTXD_DCMD_DEXT | 658 IXGBE_ADVTXD_DCMD_IFCS; 659 cmd_type |= len | IXGBE_TXD_CMD; 660 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type); 661 tx_desc->read.olinfo_status = 662 cpu_to_le32(len << IXGBE_ADVTXD_PAYLEN_SHIFT); 663 664 xdp_ring->next_to_use++; 665 if (xdp_ring->next_to_use == xdp_ring->count) 666 xdp_ring->next_to_use = 0; 667 } 668 669 if (tx_desc) { 670 ixgbe_xdp_ring_update_tail(xdp_ring); 671 xsk_umem_consume_tx_done(xdp_ring->xsk_umem); 672 } 673 674 return !!budget && work_done; 675 } 676 677 static void ixgbe_clean_xdp_tx_buffer(struct ixgbe_ring *tx_ring, 678 struct ixgbe_tx_buffer *tx_bi) 679 { 680 xdp_return_frame(tx_bi->xdpf); 681 dma_unmap_single(tx_ring->dev, 682 dma_unmap_addr(tx_bi, dma), 683 dma_unmap_len(tx_bi, len), DMA_TO_DEVICE); 684 dma_unmap_len_set(tx_bi, len, 0); 685 } 686 687 bool ixgbe_clean_xdp_tx_irq(struct ixgbe_q_vector *q_vector, 688 struct ixgbe_ring *tx_ring, int napi_budget) 689 { 690 unsigned int total_packets = 0, total_bytes = 0; 691 u32 i = tx_ring->next_to_clean, xsk_frames = 0; 692 unsigned int budget = q_vector->tx.work_limit; 693 struct xdp_umem *umem = tx_ring->xsk_umem; 694 union ixgbe_adv_tx_desc *tx_desc; 695 struct ixgbe_tx_buffer *tx_bi; 696 bool xmit_done; 697 698 tx_bi = &tx_ring->tx_buffer_info[i]; 699 tx_desc = IXGBE_TX_DESC(tx_ring, i); 700 i -= tx_ring->count; 701 702 do { 703 if (!(tx_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD))) 704 break; 705 706 total_bytes += tx_bi->bytecount; 707 total_packets += tx_bi->gso_segs; 708 709 if (tx_bi->xdpf) 710 ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi); 711 else 712 xsk_frames++; 713 714 tx_bi->xdpf = NULL; 715 total_bytes += tx_bi->bytecount; 716 717 tx_bi++; 718 tx_desc++; 719 i++; 720 if (unlikely(!i)) { 721 i -= tx_ring->count; 722 tx_bi = tx_ring->tx_buffer_info; 723 tx_desc = IXGBE_TX_DESC(tx_ring, 0); 724 } 725 726 /* issue prefetch for next Tx descriptor */ 727 prefetch(tx_desc); 728 729 /* update budget accounting */ 730 budget--; 731 } while (likely(budget)); 732 733 i += tx_ring->count; 734 tx_ring->next_to_clean = i; 735 736 u64_stats_update_begin(&tx_ring->syncp); 737 tx_ring->stats.bytes += total_bytes; 738 tx_ring->stats.packets += total_packets; 739 u64_stats_update_end(&tx_ring->syncp); 740 q_vector->tx.total_bytes += total_bytes; 741 q_vector->tx.total_packets += total_packets; 742 743 if (xsk_frames) 744 xsk_umem_complete_tx(umem, xsk_frames); 745 746 xmit_done = ixgbe_xmit_zc(tx_ring, q_vector->tx.work_limit); 747 return budget > 0 && xmit_done; 748 } 749 750 int ixgbe_xsk_async_xmit(struct net_device *dev, u32 qid) 751 { 752 struct ixgbe_adapter *adapter = netdev_priv(dev); 753 struct ixgbe_ring *ring; 754 755 if (test_bit(__IXGBE_DOWN, &adapter->state)) 756 return -ENETDOWN; 757 758 if (!READ_ONCE(adapter->xdp_prog)) 759 return -ENXIO; 760 761 if (qid >= adapter->num_xdp_queues) 762 return -ENXIO; 763 764 if (!adapter->xsk_umems || !adapter->xsk_umems[qid]) 765 return -ENXIO; 766 767 ring = adapter->xdp_ring[qid]; 768 if (!napi_if_scheduled_mark_missed(&ring->q_vector->napi)) { 769 u64 eics = BIT_ULL(ring->q_vector->v_idx); 770 771 ixgbe_irq_rearm_queues(adapter, eics); 772 } 773 774 return 0; 775 } 776 777 void ixgbe_xsk_clean_tx_ring(struct ixgbe_ring *tx_ring) 778 { 779 u16 ntc = tx_ring->next_to_clean, ntu = tx_ring->next_to_use; 780 struct xdp_umem *umem = tx_ring->xsk_umem; 781 struct ixgbe_tx_buffer *tx_bi; 782 u32 xsk_frames = 0; 783 784 while (ntc != ntu) { 785 tx_bi = &tx_ring->tx_buffer_info[ntc]; 786 787 if (tx_bi->xdpf) 788 ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi); 789 else 790 xsk_frames++; 791 792 tx_bi->xdpf = NULL; 793 794 ntc++; 795 if (ntc == tx_ring->count) 796 ntc = 0; 797 } 798 799 if (xsk_frames) 800 xsk_umem_complete_tx(umem, xsk_frames); 801 } 802