drivers/net/ethernet/intel/i40e/i40e_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_drv.h>
   6 #include <net/xdp.h>
   7
   8 #include "i40e.h"
   9 #include "i40e_txrx_common.h"
  10 #include "i40e_xsk.h"
  11
  12 void i40e_clear_rx_bi_zc(struct i40e_ring *rx_ring)
  13 {
  14         memset(rx_ring->rx_bi_zc, 0,
  15                sizeof(*rx_ring->rx_bi_zc) * rx_ring->count);
  16 }
  17
  18 static struct xdp_buff **i40e_rx_bi(struct i40e_ring *rx_ring, u32 idx)
  19 {
  20         return &rx_ring->rx_bi_zc[idx];
  21 }
  22
  23 /**
  24  * i40e_realloc_rx_xdp_bi - reallocate SW ring for either XSK or normal buffer
  25  * @rx_ring: Current rx ring
  26  * @pool_present: is pool for XSK present
  27  *
  28  * Try allocating memory and return ENOMEM, if failed to allocate.
  29  * If allocation was successful, substitute buffer with allocated one.
  30  * Returns 0 on success, negative on failure
  31  */
  32 static int i40e_realloc_rx_xdp_bi(struct i40e_ring *rx_ring, bool pool_present)
  33 {
  34         size_t elem_size = pool_present ? sizeof(*rx_ring->rx_bi_zc) :
  35                                           sizeof(*rx_ring->rx_bi);
  36         void *sw_ring = kcalloc(rx_ring->count, elem_size, GFP_KERNEL);
  37
  38         if (!sw_ring)
  39                 return -ENOMEM;
  40
  41         if (pool_present) {
  42                 kfree(rx_ring->rx_bi);
  43                 rx_ring->rx_bi = NULL;
  44                 rx_ring->rx_bi_zc = sw_ring;
  45         } else {
  46                 kfree(rx_ring->rx_bi_zc);
  47                 rx_ring->rx_bi_zc = NULL;
  48                 rx_ring->rx_bi = sw_ring;
  49         }
  50         return 0;
  51 }
  52
  53 /**
  54  * i40e_realloc_rx_bi_zc - reallocate rx SW rings
  55  * @vsi: Current VSI
  56  * @zc: is zero copy set
  57  *
  58  * Reallocate buffer for rx_rings that might be used by XSK.
  59  * XDP requires more memory, than rx_buf provides.
  60  * Returns 0 on success, negative on failure
  61  */
  62 int i40e_realloc_rx_bi_zc(struct i40e_vsi *vsi, bool zc)
  63 {
  64         struct i40e_ring *rx_ring;
  65         unsigned long q;
  66
  67         for_each_set_bit(q, vsi->af_xdp_zc_qps, vsi->alloc_queue_pairs) {
  68                 rx_ring = vsi->rx_rings[q];
  69                 if (i40e_realloc_rx_xdp_bi(rx_ring, zc))
  70                         return -ENOMEM;
  71         }
  72         return 0;
  73 }
  74
  75 /**
  76  * i40e_xsk_pool_enable - Enable/associate an AF_XDP buffer pool to a
  77  * certain ring/qid
  78  * @vsi: Current VSI
  79  * @pool: buffer pool
  80  * @qid: Rx ring to associate buffer pool with
  81  *
  82  * Returns 0 on success, <0 on failure
  83  **/
  84 static int i40e_xsk_pool_enable(struct i40e_vsi *vsi,
  85                                 struct xsk_buff_pool *pool,
  86                                 u16 qid)
  87 {
  88         struct net_device *netdev = vsi->netdev;
  89         bool if_running;
  90         int err;
  91
  92         if (vsi->type != I40E_VSI_MAIN)
  93                 return -EINVAL;
  94
  95         if (qid >= vsi->num_queue_pairs)
  96                 return -EINVAL;
  97
  98         if (qid >= netdev->real_num_rx_queues ||
  99             qid >= netdev->real_num_tx_queues)
 100                 return -EINVAL;
 101
 102         err = xsk_pool_dma_map(pool, &vsi->back->pdev->dev, I40E_RX_DMA_ATTR);
 103         if (err)
 104                 return err;
 105
 106         set_bit(qid, vsi->af_xdp_zc_qps);
 107
 108         if_running = netif_running(vsi->netdev) && i40e_enabled_xdp_vsi(vsi);
 109
 110         if (if_running) {
 111                 err = i40e_queue_pair_disable(vsi, qid);
 112                 if (err)
 113                         return err;
 114
 115                 err = i40e_realloc_rx_xdp_bi(vsi->rx_rings[qid], true);
 116                 if (err)
 117                         return err;
 118
 119                 err = i40e_queue_pair_enable(vsi, qid);
 120                 if (err)
 121                         return err;
 122
 123                 /* Kick start the NAPI context so that receiving will start */
 124                 err = i40e_xsk_wakeup(vsi->netdev, qid, XDP_WAKEUP_RX);
 125                 if (err)
 126                         return err;
 127         }
 128
 129         return 0;
 130 }
 131
 132 /**
 133  * i40e_xsk_pool_disable - Disassociate an AF_XDP buffer pool from a
 134  * certain ring/qid
 135  * @vsi: Current VSI
 136  * @qid: Rx ring to associate buffer pool with
 137  *
 138  * Returns 0 on success, <0 on failure
 139  **/
 140 static int i40e_xsk_pool_disable(struct i40e_vsi *vsi, u16 qid)
 141 {
 142         struct net_device *netdev = vsi->netdev;
 143         struct xsk_buff_pool *pool;
 144         bool if_running;
 145         int err;
 146
 147         pool = xsk_get_pool_from_qid(netdev, qid);
 148         if (!pool)
 149                 return -EINVAL;
 150
 151         if_running = netif_running(vsi->netdev) && i40e_enabled_xdp_vsi(vsi);
 152
 153         if (if_running) {
 154                 err = i40e_queue_pair_disable(vsi, qid);
 155                 if (err)
 156                         return err;
 157         }
 158
 159         clear_bit(qid, vsi->af_xdp_zc_qps);
 160         xsk_pool_dma_unmap(pool, I40E_RX_DMA_ATTR);
 161
 162         if (if_running) {
 163                 err = i40e_realloc_rx_xdp_bi(vsi->rx_rings[qid], false);
 164                 if (err)
 165                         return err;
 166                 err = i40e_queue_pair_enable(vsi, qid);
 167                 if (err)
 168                         return err;
 169         }
 170
 171         return 0;
 172 }
 173
 174 /**
 175  * i40e_xsk_pool_setup - Enable/disassociate an AF_XDP buffer pool to/from
 176  * a ring/qid
 177  * @vsi: Current VSI
 178  * @pool: Buffer pool to enable/associate to a ring, or NULL to disable
 179  * @qid: Rx ring to (dis)associate buffer pool (from)to
 180  *
 181  * This function enables or disables a buffer pool to a certain ring.
 182  *
 183  * Returns 0 on success, <0 on failure
 184  **/
 185 int i40e_xsk_pool_setup(struct i40e_vsi *vsi, struct xsk_buff_pool *pool,
 186                         u16 qid)
 187 {
 188         return pool ? i40e_xsk_pool_enable(vsi, pool, qid) :
 189                 i40e_xsk_pool_disable(vsi, qid);
 190 }
 191
 192 /**
 193  * i40e_run_xdp_zc - Executes an XDP program on an xdp_buff
 194  * @rx_ring: Rx ring
 195  * @xdp: xdp_buff used as input to the XDP program
 196  *
 197  * Returns any of I40E_XDP_{PASS, CONSUMED, TX, REDIR}
 198  **/
 199 static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
 200 {
 201         int err, result = I40E_XDP_PASS;
 202         struct i40e_ring *xdp_ring;
 203         struct bpf_prog *xdp_prog;
 204         u32 act;
 205
 206         rcu_read_lock();
 207         /* NB! xdp_prog will always be !NULL, due to the fact that
 208          * this path is enabled by setting an XDP program.
 209          */
 210         xdp_prog = READ_ONCE(rx_ring->xdp_prog);
 211         act = bpf_prog_run_xdp(xdp_prog, xdp);
 212
 213         if (likely(act == XDP_REDIRECT)) {
 214                 err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
 215                 if (err)
 216                         goto out_failure;
 217                 rcu_read_unlock();
 218                 return I40E_XDP_REDIR;
 219         }
 220
 221         switch (act) {
 222         case XDP_PASS:
 223                 break;
 224         case XDP_TX:
 225                 xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->queue_index];
 226                 result = i40e_xmit_xdp_tx_ring(xdp, xdp_ring);
 227                 if (result == I40E_XDP_CONSUMED)
 228                         goto out_failure;
 229                 break;
 230         default:
 231                 bpf_warn_invalid_xdp_action(act);
 232                 fallthrough;
 233         case XDP_ABORTED:
 234 out_failure:
 235                 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
 236                 fallthrough; /* handle aborts by dropping packet */
 237         case XDP_DROP:
 238                 result = I40E_XDP_CONSUMED;
 239                 break;
 240         }
 241         rcu_read_unlock();
 242         return result;
 243 }
 244
 245 bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 count)
 246 {
 247         u16 ntu = rx_ring->next_to_use;
 248         union i40e_rx_desc *rx_desc;
 249         struct xdp_buff **bi, *xdp;
 250         dma_addr_t dma;
 251         bool ok = true;
 252
 253         rx_desc = I40E_RX_DESC(rx_ring, ntu);
 254         bi = i40e_rx_bi(rx_ring, ntu);
 255         do {
 256                 xdp = xsk_buff_alloc(rx_ring->xsk_pool);
 257                 if (!xdp) {
 258                         ok = false;
 259                         goto no_buffers;
 260                 }
 261                 *bi = xdp;
 262                 dma = xsk_buff_xdp_get_dma(xdp);
 263                 rx_desc->read.pkt_addr = cpu_to_le64(dma);
 264                 rx_desc->read.hdr_addr = 0;
 265
 266                 rx_desc++;
 267                 bi++;
 268                 ntu++;
 269
 270                 if (unlikely(ntu == rx_ring->count)) {
 271                         rx_desc = I40E_RX_DESC(rx_ring, 0);
 272                         bi = i40e_rx_bi(rx_ring, 0);
 273                         ntu = 0;
 274                 }
 275
 276                 count--;
 277         } while (count);
 278
 279 no_buffers:
 280         if (rx_ring->next_to_use != ntu) {
 281                 /* clear the status bits for the next_to_use descriptor */
 282                 rx_desc->wb.qword1.status_error_len = 0;
 283                 i40e_release_rx_desc(rx_ring, ntu);
 284         }
 285
 286         return ok;
 287 }
 288
 289 /**
 290  * i40e_construct_skb_zc - Create skbuff from zero-copy Rx buffer
 291  * @rx_ring: Rx ring
 292  * @xdp: xdp_buff
 293  *
 294  * This functions allocates a new skb from a zero-copy Rx buffer.
 295  *
 296  * Returns the skb, or NULL on failure.
 297  **/
 298 static struct sk_buff *i40e_construct_skb_zc(struct i40e_ring *rx_ring,
 299                                              struct xdp_buff *xdp)
 300 {
 301         unsigned int totalsize = xdp->data_end - xdp->data_meta;
 302         unsigned int metasize = xdp->data - xdp->data_meta;
 303         struct sk_buff *skb;
 304
 305         net_prefetch(xdp->data_meta);
 306
 307         /* allocate a skb to store the frags */
 308         skb = __napi_alloc_skb(&rx_ring->q_vector->napi, totalsize,
 309                                GFP_ATOMIC | __GFP_NOWARN);
 310         if (unlikely(!skb))
 311                 return NULL;
 312
 313         memcpy(__skb_put(skb, totalsize), xdp->data_meta,
 314                ALIGN(totalsize, sizeof(long)));
 315
 316         if (metasize) {
 317                 skb_metadata_set(skb, metasize);
 318                 __skb_pull(skb, metasize);
 319         }
 320
 321         xsk_buff_free(xdp);
 322         return skb;
 323 }
 324
 325 /**
 326  * i40e_inc_ntc: Advance the next_to_clean index
 327  * @rx_ring: Rx ring
 328  **/
 329 static void i40e_inc_ntc(struct i40e_ring *rx_ring)
 330 {
 331         u32 ntc = rx_ring->next_to_clean + 1;
 332
 333         ntc = (ntc < rx_ring->count) ? ntc : 0;
 334         rx_ring->next_to_clean = ntc;
 335 }
 336
 337 /**
 338  * i40e_clean_rx_irq_zc - Consumes Rx packets from the hardware ring
 339  * @rx_ring: Rx ring
 340  * @budget: NAPI budget
 341  *
 342  * Returns amount of work completed
 343  **/
 344 int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 345 {
 346         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 347         u16 cleaned_count = I40E_DESC_UNUSED(rx_ring);
 348         unsigned int xdp_res, xdp_xmit = 0;
 349         bool failure = false;
 350         struct sk_buff *skb;
 351
 352         while (likely(total_rx_packets < (unsigned int)budget)) {
 353                 union i40e_rx_desc *rx_desc;
 354                 struct xdp_buff **bi;
 355                 unsigned int size;
 356                 u64 qword;
 357
 358                 rx_desc = I40E_RX_DESC(rx_ring, rx_ring->next_to_clean);
 359                 qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len);
 360
 361                 /* This memory barrier is needed to keep us from reading
 362                  * any other fields out of the rx_desc until we have
 363                  * verified the descriptor has been written back.
 364                  */
 365                 dma_rmb();
 366
 367                 if (i40e_rx_is_programming_status(qword)) {
 368                         i40e_clean_programming_status(rx_ring,
 369                                                       rx_desc->raw.qword[0],
 370                                                       qword);
 371                         bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
 372                         xsk_buff_free(*bi);
 373                         *bi = NULL;
 374                         cleaned_count++;
 375                         i40e_inc_ntc(rx_ring);
 376                         continue;
 377                 }
 378
 379                 bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
 380                 size = (qword & I40E_RXD_QW1_LENGTH_PBUF_MASK) >>
 381                        I40E_RXD_QW1_LENGTH_PBUF_SHIFT;
 382                 if (!size)
 383                         break;
 384
 385                 bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
 386                 (*bi)->data_end = (*bi)->data + size;
 387                 xsk_buff_dma_sync_for_cpu(*bi, rx_ring->xsk_pool);
 388
 389                 xdp_res = i40e_run_xdp_zc(rx_ring, *bi);
 390                 if (xdp_res) {
 391                         if (xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR))
 392                                 xdp_xmit |= xdp_res;
 393                         else
 394                                 xsk_buff_free(*bi);
 395
 396                         *bi = NULL;
 397                         total_rx_bytes += size;
 398                         total_rx_packets++;
 399
 400                         cleaned_count++;
 401                         i40e_inc_ntc(rx_ring);
 402                         continue;
 403                 }
 404
 405                 /* XDP_PASS path */
 406
 407                 /* NB! We are not checking for errors using
 408                  * i40e_test_staterr with
 409                  * BIT(I40E_RXD_QW1_ERROR_SHIFT). This is due to that
 410                  * SBP is *not* set in PRT_SBPVSI (default not set).
 411                  */
 412                 skb = i40e_construct_skb_zc(rx_ring, *bi);
 413                 if (!skb) {
 414                         rx_ring->rx_stats.alloc_buff_failed++;
 415                         break;
 416                 }
 417
 418                 *bi = NULL;
 419                 cleaned_count++;
 420                 i40e_inc_ntc(rx_ring);
 421
 422                 if (eth_skb_pad(skb))
 423                         continue;
 424
 425                 total_rx_bytes += skb->len;
 426                 total_rx_packets++;
 427
 428                 i40e_process_skb_fields(rx_ring, rx_desc, skb);
 429                 napi_gro_receive(&rx_ring->q_vector->napi, skb);
 430         }
 431
 432         if (cleaned_count >= I40E_RX_BUFFER_WRITE)
 433                 failure = !i40e_alloc_rx_buffers_zc(rx_ring, cleaned_count);
 434
 435         i40e_finalize_xdp_rx(rx_ring, xdp_xmit);
 436         i40e_update_rx_stats(rx_ring, total_rx_bytes, total_rx_packets);
 437
 438         if (xsk_uses_need_wakeup(rx_ring->xsk_pool)) {
 439                 if (failure || rx_ring->next_to_clean == rx_ring->next_to_use)
 440                         xsk_set_rx_need_wakeup(rx_ring->xsk_pool);
 441                 else
 442                         xsk_clear_rx_need_wakeup(rx_ring->xsk_pool);
 443
 444                 return (int)total_rx_packets;
 445         }
 446         return failure ? budget : (int)total_rx_packets;
 447 }
 448
 449 /**
 450  * i40e_xmit_zc - Performs zero-copy Tx AF_XDP
 451  * @xdp_ring: XDP Tx ring
 452  * @budget: NAPI budget
 453  *
 454  * Returns true if the work is finished.
 455  **/
 456 static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget)
 457 {
 458         unsigned int sent_frames = 0, total_bytes = 0;
 459         struct i40e_tx_desc *tx_desc = NULL;
 460         struct i40e_tx_buffer *tx_bi;
 461         struct xdp_desc desc;
 462         dma_addr_t dma;
 463
 464         while (budget-- > 0) {
 465                 if (!xsk_tx_peek_desc(xdp_ring->xsk_pool, &desc))
 466                         break;
 467
 468                 dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc.addr);
 469                 xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma,
 470                                                  desc.len);
 471
 472                 tx_bi = &xdp_ring->tx_bi[xdp_ring->next_to_use];
 473                 tx_bi->bytecount = desc.len;
 474
 475                 tx_desc = I40E_TX_DESC(xdp_ring, xdp_ring->next_to_use);
 476                 tx_desc->buffer_addr = cpu_to_le64(dma);
 477                 tx_desc->cmd_type_offset_bsz =
 478                         build_ctob(I40E_TX_DESC_CMD_ICRC
 479                                    | I40E_TX_DESC_CMD_EOP,
 480                                    0, desc.len, 0);
 481
 482                 sent_frames++;
 483                 total_bytes += tx_bi->bytecount;
 484
 485                 xdp_ring->next_to_use++;
 486                 if (xdp_ring->next_to_use == xdp_ring->count)
 487                         xdp_ring->next_to_use = 0;
 488         }
 489
 490         if (tx_desc) {
 491                 /* Request an interrupt for the last frame and bump tail ptr. */
 492                 tx_desc->cmd_type_offset_bsz |= (I40E_TX_DESC_CMD_RS <<
 493                                                  I40E_TXD_QW1_CMD_SHIFT);
 494                 i40e_xdp_ring_update_tail(xdp_ring);
 495
 496                 xsk_tx_release(xdp_ring->xsk_pool);
 497                 i40e_update_tx_stats(xdp_ring, sent_frames, total_bytes);
 498         }
 499
 500         return !!budget;
 501 }
 502
 503 /**
 504  * i40e_clean_xdp_tx_buffer - Frees and unmaps an XDP Tx entry
 505  * @tx_ring: XDP Tx ring
 506  * @tx_bi: Tx buffer info to clean
 507  **/
 508 static void i40e_clean_xdp_tx_buffer(struct i40e_ring *tx_ring,
 509                                      struct i40e_tx_buffer *tx_bi)
 510 {
 511         xdp_return_frame(tx_bi->xdpf);
 512         tx_ring->xdp_tx_active--;
 513         dma_unmap_single(tx_ring->dev,
 514                          dma_unmap_addr(tx_bi, dma),
 515                          dma_unmap_len(tx_bi, len), DMA_TO_DEVICE);
 516         dma_unmap_len_set(tx_bi, len, 0);
 517 }
 518
 519 /**
 520  * i40e_clean_xdp_tx_irq - Completes AF_XDP entries, and cleans XDP entries
 521  * @vsi: Current VSI
 522  * @tx_ring: XDP Tx ring
 523  *
 524  * Returns true if cleanup/tranmission is done.
 525  **/
 526 bool i40e_clean_xdp_tx_irq(struct i40e_vsi *vsi, struct i40e_ring *tx_ring)
 527 {
 528         struct xsk_buff_pool *bp = tx_ring->xsk_pool;
 529         u32 i, completed_frames, xsk_frames = 0;
 530         u32 head_idx = i40e_get_head(tx_ring);
 531         struct i40e_tx_buffer *tx_bi;
 532         unsigned int ntc;
 533
 534         if (head_idx < tx_ring->next_to_clean)
 535                 head_idx += tx_ring->count;
 536         completed_frames = head_idx - tx_ring->next_to_clean;
 537
 538         if (completed_frames == 0)
 539                 goto out_xmit;
 540
 541         if (likely(!tx_ring->xdp_tx_active)) {
 542                 xsk_frames = completed_frames;
 543                 goto skip;
 544         }
 545
 546         ntc = tx_ring->next_to_clean;
 547
 548         for (i = 0; i < completed_frames; i++) {
 549                 tx_bi = &tx_ring->tx_bi[ntc];
 550
 551                 if (tx_bi->xdpf) {
 552                         i40e_clean_xdp_tx_buffer(tx_ring, tx_bi);
 553                         tx_bi->xdpf = NULL;
 554                 } else {
 555                         xsk_frames++;
 556                 }
 557
 558                 if (++ntc >= tx_ring->count)
 559                         ntc = 0;
 560         }
 561
 562 skip:
 563         tx_ring->next_to_clean += completed_frames;
 564         if (unlikely(tx_ring->next_to_clean >= tx_ring->count))
 565                 tx_ring->next_to_clean -= tx_ring->count;
 566
 567         if (xsk_frames)
 568                 xsk_tx_completed(bp, xsk_frames);
 569
 570         i40e_arm_wb(tx_ring, vsi, completed_frames);
 571
 572 out_xmit:
 573         if (xsk_uses_need_wakeup(tx_ring->xsk_pool))
 574                 xsk_set_tx_need_wakeup(tx_ring->xsk_pool);
 575
 576         return i40e_xmit_zc(tx_ring, I40E_DESC_UNUSED(tx_ring));
 577 }
 578
 579 /**
 580  * i40e_xsk_wakeup - Implements the ndo_xsk_wakeup
 581  * @dev: the netdevice
 582  * @queue_id: queue id to wake up
 583  * @flags: ignored in our case since we have Rx and Tx in the same NAPI.
 584  *
 585  * Returns <0 for errors, 0 otherwise.
 586  **/
 587 int i40e_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags)
 588 {
 589         struct i40e_netdev_priv *np = netdev_priv(dev);
 590         struct i40e_vsi *vsi = np->vsi;
 591         struct i40e_pf *pf = vsi->back;
 592         struct i40e_ring *ring;
 593
 594         if (test_bit(__I40E_CONFIG_BUSY, pf->state))
 595                 return -EAGAIN;
 596
 597         if (test_bit(__I40E_VSI_DOWN, vsi->state))
 598                 return -ENETDOWN;
 599
 600         if (!i40e_enabled_xdp_vsi(vsi))
 601                 return -ENXIO;
 602
 603         if (queue_id >= vsi->num_queue_pairs)
 604                 return -ENXIO;
 605
 606         if (!vsi->xdp_rings[queue_id]->xsk_pool)
 607                 return -ENXIO;
 608
 609         ring = vsi->xdp_rings[queue_id];
 610
 611         /* The idea here is that if NAPI is running, mark a miss, so
 612          * it will run again. If not, trigger an interrupt and
 613          * schedule the NAPI from interrupt context. If NAPI would be
 614          * scheduled here, the interrupt affinity would not be
 615          * honored.
 616          */
 617         if (!napi_if_scheduled_mark_missed(&ring->q_vector->napi))
 618                 i40e_force_wb(vsi, ring->q_vector);
 619
 620         return 0;
 621 }
 622
 623 void i40e_xsk_clean_rx_ring(struct i40e_ring *rx_ring)
 624 {
 625         u16 i;
 626
 627         for (i = 0; i < rx_ring->count; i++) {
 628                 struct xdp_buff *rx_bi = *i40e_rx_bi(rx_ring, i);
 629
 630                 if (!rx_bi)
 631                         continue;
 632
 633                 xsk_buff_free(rx_bi);
 634                 rx_bi = NULL;
 635         }
 636 }
 637
 638 /**
 639  * i40e_xsk_clean_xdp_ring - Clean the XDP Tx ring on shutdown
 640  * @tx_ring: XDP Tx ring
 641  **/
 642 void i40e_xsk_clean_tx_ring(struct i40e_ring *tx_ring)
 643 {
 644         u16 ntc = tx_ring->next_to_clean, ntu = tx_ring->next_to_use;
 645         struct xsk_buff_pool *bp = tx_ring->xsk_pool;
 646         struct i40e_tx_buffer *tx_bi;
 647         u32 xsk_frames = 0;
 648
 649         while (ntc != ntu) {
 650                 tx_bi = &tx_ring->tx_bi[ntc];
 651
 652                 if (tx_bi->xdpf)
 653                         i40e_clean_xdp_tx_buffer(tx_ring, tx_bi);
 654                 else
 655                         xsk_frames++;
 656
 657                 tx_bi->xdpf = NULL;
 658
 659                 ntc++;
 660                 if (ntc >= tx_ring->count)
 661                         ntc = 0;
 662         }
 663
 664         if (xsk_frames)
 665                 xsk_tx_completed(bp, xsk_frames);
 666 }
 667
 668 /**
 669  * i40e_xsk_any_rx_ring_enabled - Checks if Rx rings have an AF_XDP
 670  * buffer pool attached
 671  * @vsi: vsi
 672  *
 673  * Returns true if any of the Rx rings has an AF_XDP buffer pool attached
 674  **/
 675 bool i40e_xsk_any_rx_ring_enabled(struct i40e_vsi *vsi)
 676 {
 677         struct net_device *netdev = vsi->netdev;
 678         int i;
 679
 680         for (i = 0; i < vsi->num_queue_pairs; i++) {
 681                 if (xsk_get_pool_from_qid(netdev, i))
 682                         return true;
 683         }
 684
 685         return false;
 686 }