drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c

   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 }