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