This source file includes following definitions.
- ixgbe_xsk_umem
- ixgbe_xsk_umem_dma_map
- ixgbe_xsk_umem_dma_unmap
- ixgbe_xsk_umem_enable
- ixgbe_xsk_umem_disable
- ixgbe_xsk_umem_setup
- ixgbe_run_xdp_zc
- ixgbe_get_rx_buffer_zc
- ixgbe_reuse_rx_buffer_zc
- ixgbe_zca_free
- ixgbe_alloc_buffer_zc
- ixgbe_alloc_buffer_slow_zc
- __ixgbe_alloc_rx_buffers_zc
- ixgbe_alloc_rx_buffers_zc
- ixgbe_alloc_rx_buffers_fast_zc
- ixgbe_construct_skb_zc
- ixgbe_inc_ntc
- ixgbe_clean_rx_irq_zc
- ixgbe_xsk_clean_rx_ring
- ixgbe_xmit_zc
- ixgbe_clean_xdp_tx_buffer
- ixgbe_clean_xdp_tx_irq
- ixgbe_xsk_wakeup
- ixgbe_xsk_clean_tx_ring
1
2
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
103 err = ixgbe_xsk_wakeup(adapter->netdev, qid, XDP_WAKEUP_RX);
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 struct xdp_umem *umem = rx_ring->xsk_umem;
147 int err, result = IXGBE_XDP_PASS;
148 struct bpf_prog *xdp_prog;
149 struct xdp_frame *xdpf;
150 u64 offset;
151 u32 act;
152
153 rcu_read_lock();
154 xdp_prog = READ_ONCE(rx_ring->xdp_prog);
155 act = bpf_prog_run_xdp(xdp_prog, xdp);
156 offset = xdp->data - xdp->data_hard_start;
157
158 xdp->handle = xsk_umem_adjust_offset(umem, xdp->handle, offset);
159
160 switch (act) {
161 case XDP_PASS:
162 break;
163 case XDP_TX:
164 xdpf = convert_to_xdp_frame(xdp);
165 if (unlikely(!xdpf)) {
166 result = IXGBE_XDP_CONSUMED;
167 break;
168 }
169 result = ixgbe_xmit_xdp_ring(adapter, xdpf);
170 break;
171 case XDP_REDIRECT:
172 err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
173 result = !err ? IXGBE_XDP_REDIR : IXGBE_XDP_CONSUMED;
174 break;
175 default:
176 bpf_warn_invalid_xdp_action(act);
177
178 case XDP_ABORTED:
179 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
180
181 case XDP_DROP:
182 result = IXGBE_XDP_CONSUMED;
183 break;
184 }
185 rcu_read_unlock();
186 return result;
187 }
188
189 static struct
190 ixgbe_rx_buffer *ixgbe_get_rx_buffer_zc(struct ixgbe_ring *rx_ring,
191 unsigned int size)
192 {
193 struct ixgbe_rx_buffer *bi;
194
195 bi = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
196
197
198 dma_sync_single_range_for_cpu(rx_ring->dev,
199 bi->dma, 0,
200 size,
201 DMA_BIDIRECTIONAL);
202
203 return bi;
204 }
205
206 static void ixgbe_reuse_rx_buffer_zc(struct ixgbe_ring *rx_ring,
207 struct ixgbe_rx_buffer *obi)
208 {
209 u16 nta = rx_ring->next_to_alloc;
210 struct ixgbe_rx_buffer *nbi;
211
212 nbi = &rx_ring->rx_buffer_info[rx_ring->next_to_alloc];
213
214 nta++;
215 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
216
217
218 nbi->dma = obi->dma;
219 nbi->addr = obi->addr;
220 nbi->handle = obi->handle;
221
222 obi->addr = NULL;
223 obi->skb = NULL;
224 }
225
226 void ixgbe_zca_free(struct zero_copy_allocator *alloc, unsigned long handle)
227 {
228 struct ixgbe_rx_buffer *bi;
229 struct ixgbe_ring *rx_ring;
230 u64 hr, mask;
231 u16 nta;
232
233 rx_ring = container_of(alloc, struct ixgbe_ring, zca);
234 hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM;
235 mask = rx_ring->xsk_umem->chunk_mask;
236
237 nta = rx_ring->next_to_alloc;
238 bi = rx_ring->rx_buffer_info;
239
240 nta++;
241 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
242
243 handle &= mask;
244
245 bi->dma = xdp_umem_get_dma(rx_ring->xsk_umem, handle);
246 bi->dma += hr;
247
248 bi->addr = xdp_umem_get_data(rx_ring->xsk_umem, handle);
249 bi->addr += hr;
250
251 bi->handle = xsk_umem_adjust_offset(rx_ring->xsk_umem, (u64)handle,
252 rx_ring->xsk_umem->headroom);
253 }
254
255 static bool ixgbe_alloc_buffer_zc(struct ixgbe_ring *rx_ring,
256 struct ixgbe_rx_buffer *bi)
257 {
258 struct xdp_umem *umem = rx_ring->xsk_umem;
259 void *addr = bi->addr;
260 u64 handle, hr;
261
262 if (addr)
263 return true;
264
265 if (!xsk_umem_peek_addr(umem, &handle)) {
266 rx_ring->rx_stats.alloc_rx_page_failed++;
267 return false;
268 }
269
270 hr = umem->headroom + XDP_PACKET_HEADROOM;
271
272 bi->dma = xdp_umem_get_dma(umem, handle);
273 bi->dma += hr;
274
275 bi->addr = xdp_umem_get_data(umem, handle);
276 bi->addr += hr;
277
278 bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
279
280 xsk_umem_discard_addr(umem);
281 return true;
282 }
283
284 static bool ixgbe_alloc_buffer_slow_zc(struct ixgbe_ring *rx_ring,
285 struct ixgbe_rx_buffer *bi)
286 {
287 struct xdp_umem *umem = rx_ring->xsk_umem;
288 u64 handle, hr;
289
290 if (!xsk_umem_peek_addr_rq(umem, &handle)) {
291 rx_ring->rx_stats.alloc_rx_page_failed++;
292 return false;
293 }
294
295 handle &= rx_ring->xsk_umem->chunk_mask;
296
297 hr = umem->headroom + XDP_PACKET_HEADROOM;
298
299 bi->dma = xdp_umem_get_dma(umem, handle);
300 bi->dma += hr;
301
302 bi->addr = xdp_umem_get_data(umem, handle);
303 bi->addr += hr;
304
305 bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
306
307 xsk_umem_discard_addr_rq(umem);
308 return true;
309 }
310
311 static __always_inline bool
312 __ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count,
313 bool alloc(struct ixgbe_ring *rx_ring,
314 struct ixgbe_rx_buffer *bi))
315 {
316 union ixgbe_adv_rx_desc *rx_desc;
317 struct ixgbe_rx_buffer *bi;
318 u16 i = rx_ring->next_to_use;
319 bool ok = true;
320
321
322 if (!cleaned_count)
323 return true;
324
325 rx_desc = IXGBE_RX_DESC(rx_ring, i);
326 bi = &rx_ring->rx_buffer_info[i];
327 i -= rx_ring->count;
328
329 do {
330 if (!alloc(rx_ring, bi)) {
331 ok = false;
332 break;
333 }
334
335
336 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
337 bi->page_offset,
338 rx_ring->rx_buf_len,
339 DMA_BIDIRECTIONAL);
340
341
342
343
344 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
345
346 rx_desc++;
347 bi++;
348 i++;
349 if (unlikely(!i)) {
350 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
351 bi = rx_ring->rx_buffer_info;
352 i -= rx_ring->count;
353 }
354
355
356 rx_desc->wb.upper.length = 0;
357
358 cleaned_count--;
359 } while (cleaned_count);
360
361 i += rx_ring->count;
362
363 if (rx_ring->next_to_use != i) {
364 rx_ring->next_to_use = i;
365
366
367 rx_ring->next_to_alloc = i;
368
369
370
371
372
373
374 wmb();
375 writel(i, rx_ring->tail);
376 }
377
378 return ok;
379 }
380
381 void ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 count)
382 {
383 __ixgbe_alloc_rx_buffers_zc(rx_ring, count,
384 ixgbe_alloc_buffer_slow_zc);
385 }
386
387 static bool ixgbe_alloc_rx_buffers_fast_zc(struct ixgbe_ring *rx_ring,
388 u16 count)
389 {
390 return __ixgbe_alloc_rx_buffers_zc(rx_ring, count,
391 ixgbe_alloc_buffer_zc);
392 }
393
394 static struct sk_buff *ixgbe_construct_skb_zc(struct ixgbe_ring *rx_ring,
395 struct ixgbe_rx_buffer *bi,
396 struct xdp_buff *xdp)
397 {
398 unsigned int metasize = xdp->data - xdp->data_meta;
399 unsigned int datasize = xdp->data_end - xdp->data;
400 struct sk_buff *skb;
401
402
403 skb = __napi_alloc_skb(&rx_ring->q_vector->napi,
404 xdp->data_end - xdp->data_hard_start,
405 GFP_ATOMIC | __GFP_NOWARN);
406 if (unlikely(!skb))
407 return NULL;
408
409 skb_reserve(skb, xdp->data - xdp->data_hard_start);
410 memcpy(__skb_put(skb, datasize), xdp->data, datasize);
411 if (metasize)
412 skb_metadata_set(skb, metasize);
413
414 ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
415 return skb;
416 }
417
418 static void ixgbe_inc_ntc(struct ixgbe_ring *rx_ring)
419 {
420 u32 ntc = rx_ring->next_to_clean + 1;
421
422 ntc = (ntc < rx_ring->count) ? ntc : 0;
423 rx_ring->next_to_clean = ntc;
424 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
425 }
426
427 int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector,
428 struct ixgbe_ring *rx_ring,
429 const int budget)
430 {
431 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
432 struct ixgbe_adapter *adapter = q_vector->adapter;
433 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
434 unsigned int xdp_res, xdp_xmit = 0;
435 bool failure = false;
436 struct sk_buff *skb;
437 struct xdp_buff xdp;
438
439 xdp.rxq = &rx_ring->xdp_rxq;
440
441 while (likely(total_rx_packets < budget)) {
442 union ixgbe_adv_rx_desc *rx_desc;
443 struct ixgbe_rx_buffer *bi;
444 unsigned int size;
445
446
447 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
448 failure = failure ||
449 !ixgbe_alloc_rx_buffers_fast_zc(rx_ring,
450 cleaned_count);
451 cleaned_count = 0;
452 }
453
454 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
455 size = le16_to_cpu(rx_desc->wb.upper.length);
456 if (!size)
457 break;
458
459
460
461
462
463 dma_rmb();
464
465 bi = ixgbe_get_rx_buffer_zc(rx_ring, size);
466
467 if (unlikely(!ixgbe_test_staterr(rx_desc,
468 IXGBE_RXD_STAT_EOP))) {
469 struct ixgbe_rx_buffer *next_bi;
470
471 ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
472 ixgbe_inc_ntc(rx_ring);
473 next_bi =
474 &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
475 next_bi->skb = ERR_PTR(-EINVAL);
476 continue;
477 }
478
479 if (unlikely(bi->skb)) {
480 ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
481 ixgbe_inc_ntc(rx_ring);
482 continue;
483 }
484
485 xdp.data = bi->addr;
486 xdp.data_meta = xdp.data;
487 xdp.data_hard_start = xdp.data - XDP_PACKET_HEADROOM;
488 xdp.data_end = xdp.data + size;
489 xdp.handle = bi->handle;
490
491 xdp_res = ixgbe_run_xdp_zc(adapter, rx_ring, &xdp);
492
493 if (xdp_res) {
494 if (xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR)) {
495 xdp_xmit |= xdp_res;
496 bi->addr = NULL;
497 bi->skb = NULL;
498 } else {
499 ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
500 }
501 total_rx_packets++;
502 total_rx_bytes += size;
503
504 cleaned_count++;
505 ixgbe_inc_ntc(rx_ring);
506 continue;
507 }
508
509
510 skb = ixgbe_construct_skb_zc(rx_ring, bi, &xdp);
511 if (!skb) {
512 rx_ring->rx_stats.alloc_rx_buff_failed++;
513 break;
514 }
515
516 cleaned_count++;
517 ixgbe_inc_ntc(rx_ring);
518
519 if (eth_skb_pad(skb))
520 continue;
521
522 total_rx_bytes += skb->len;
523 total_rx_packets++;
524
525 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
526 ixgbe_rx_skb(q_vector, skb);
527 }
528
529 if (xdp_xmit & IXGBE_XDP_REDIR)
530 xdp_do_flush_map();
531
532 if (xdp_xmit & IXGBE_XDP_TX) {
533 struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()];
534
535
536
537
538 wmb();
539 writel(ring->next_to_use, ring->tail);
540 }
541
542 u64_stats_update_begin(&rx_ring->syncp);
543 rx_ring->stats.packets += total_rx_packets;
544 rx_ring->stats.bytes += total_rx_bytes;
545 u64_stats_update_end(&rx_ring->syncp);
546 q_vector->rx.total_packets += total_rx_packets;
547 q_vector->rx.total_bytes += total_rx_bytes;
548
549 if (xsk_umem_uses_need_wakeup(rx_ring->xsk_umem)) {
550 if (failure || rx_ring->next_to_clean == rx_ring->next_to_use)
551 xsk_set_rx_need_wakeup(rx_ring->xsk_umem);
552 else
553 xsk_clear_rx_need_wakeup(rx_ring->xsk_umem);
554
555 return (int)total_rx_packets;
556 }
557 return failure ? budget : (int)total_rx_packets;
558 }
559
560 void ixgbe_xsk_clean_rx_ring(struct ixgbe_ring *rx_ring)
561 {
562 u16 i = rx_ring->next_to_clean;
563 struct ixgbe_rx_buffer *bi = &rx_ring->rx_buffer_info[i];
564
565 while (i != rx_ring->next_to_alloc) {
566 xsk_umem_fq_reuse(rx_ring->xsk_umem, bi->handle);
567 i++;
568 bi++;
569 if (i == rx_ring->count) {
570 i = 0;
571 bi = rx_ring->rx_buffer_info;
572 }
573 }
574 }
575
576 static bool ixgbe_xmit_zc(struct ixgbe_ring *xdp_ring, unsigned int budget)
577 {
578 union ixgbe_adv_tx_desc *tx_desc = NULL;
579 struct ixgbe_tx_buffer *tx_bi;
580 bool work_done = true;
581 struct xdp_desc desc;
582 dma_addr_t dma;
583 u32 cmd_type;
584
585 while (budget-- > 0) {
586 if (unlikely(!ixgbe_desc_unused(xdp_ring)) ||
587 !netif_carrier_ok(xdp_ring->netdev)) {
588 work_done = false;
589 break;
590 }
591
592 if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &desc))
593 break;
594
595 dma = xdp_umem_get_dma(xdp_ring->xsk_umem, desc.addr);
596
597 dma_sync_single_for_device(xdp_ring->dev, dma, desc.len,
598 DMA_BIDIRECTIONAL);
599
600 tx_bi = &xdp_ring->tx_buffer_info[xdp_ring->next_to_use];
601 tx_bi->bytecount = desc.len;
602 tx_bi->xdpf = NULL;
603 tx_bi->gso_segs = 1;
604
605 tx_desc = IXGBE_TX_DESC(xdp_ring, xdp_ring->next_to_use);
606 tx_desc->read.buffer_addr = cpu_to_le64(dma);
607
608
609 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
610 IXGBE_ADVTXD_DCMD_DEXT |
611 IXGBE_ADVTXD_DCMD_IFCS;
612 cmd_type |= desc.len | IXGBE_TXD_CMD;
613 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
614 tx_desc->read.olinfo_status =
615 cpu_to_le32(desc.len << IXGBE_ADVTXD_PAYLEN_SHIFT);
616
617 xdp_ring->next_to_use++;
618 if (xdp_ring->next_to_use == xdp_ring->count)
619 xdp_ring->next_to_use = 0;
620 }
621
622 if (tx_desc) {
623 ixgbe_xdp_ring_update_tail(xdp_ring);
624 xsk_umem_consume_tx_done(xdp_ring->xsk_umem);
625 }
626
627 return !!budget && work_done;
628 }
629
630 static void ixgbe_clean_xdp_tx_buffer(struct ixgbe_ring *tx_ring,
631 struct ixgbe_tx_buffer *tx_bi)
632 {
633 xdp_return_frame(tx_bi->xdpf);
634 dma_unmap_single(tx_ring->dev,
635 dma_unmap_addr(tx_bi, dma),
636 dma_unmap_len(tx_bi, len), DMA_TO_DEVICE);
637 dma_unmap_len_set(tx_bi, len, 0);
638 }
639
640 bool ixgbe_clean_xdp_tx_irq(struct ixgbe_q_vector *q_vector,
641 struct ixgbe_ring *tx_ring, int napi_budget)
642 {
643 u16 ntc = tx_ring->next_to_clean, ntu = tx_ring->next_to_use;
644 unsigned int total_packets = 0, total_bytes = 0;
645 struct xdp_umem *umem = tx_ring->xsk_umem;
646 union ixgbe_adv_tx_desc *tx_desc;
647 struct ixgbe_tx_buffer *tx_bi;
648 u32 xsk_frames = 0;
649
650 tx_bi = &tx_ring->tx_buffer_info[ntc];
651 tx_desc = IXGBE_TX_DESC(tx_ring, ntc);
652
653 while (ntc != ntu) {
654 if (!(tx_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
655 break;
656
657 total_bytes += tx_bi->bytecount;
658 total_packets += tx_bi->gso_segs;
659
660 if (tx_bi->xdpf)
661 ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi);
662 else
663 xsk_frames++;
664
665 tx_bi->xdpf = NULL;
666
667 tx_bi++;
668 tx_desc++;
669 ntc++;
670 if (unlikely(ntc == tx_ring->count)) {
671 ntc = 0;
672 tx_bi = tx_ring->tx_buffer_info;
673 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
674 }
675
676
677 prefetch(tx_desc);
678 }
679
680 tx_ring->next_to_clean = ntc;
681
682 u64_stats_update_begin(&tx_ring->syncp);
683 tx_ring->stats.bytes += total_bytes;
684 tx_ring->stats.packets += total_packets;
685 u64_stats_update_end(&tx_ring->syncp);
686 q_vector->tx.total_bytes += total_bytes;
687 q_vector->tx.total_packets += total_packets;
688
689 if (xsk_frames)
690 xsk_umem_complete_tx(umem, xsk_frames);
691
692 if (xsk_umem_uses_need_wakeup(tx_ring->xsk_umem))
693 xsk_set_tx_need_wakeup(tx_ring->xsk_umem);
694
695 return ixgbe_xmit_zc(tx_ring, q_vector->tx.work_limit);
696 }
697
698 int ixgbe_xsk_wakeup(struct net_device *dev, u32 qid, u32 flags)
699 {
700 struct ixgbe_adapter *adapter = netdev_priv(dev);
701 struct ixgbe_ring *ring;
702
703 if (test_bit(__IXGBE_DOWN, &adapter->state))
704 return -ENETDOWN;
705
706 if (!READ_ONCE(adapter->xdp_prog))
707 return -ENXIO;
708
709 if (qid >= adapter->num_xdp_queues)
710 return -ENXIO;
711
712 ring = adapter->xdp_ring[qid];
713
714 if (test_bit(__IXGBE_TX_DISABLED, &ring->state))
715 return -ENETDOWN;
716
717 if (!ring->xsk_umem)
718 return -ENXIO;
719
720 if (!napi_if_scheduled_mark_missed(&ring->q_vector->napi)) {
721 u64 eics = BIT_ULL(ring->q_vector->v_idx);
722
723 ixgbe_irq_rearm_queues(adapter, eics);
724 }
725
726 return 0;
727 }
728
729 void ixgbe_xsk_clean_tx_ring(struct ixgbe_ring *tx_ring)
730 {
731 u16 ntc = tx_ring->next_to_clean, ntu = tx_ring->next_to_use;
732 struct xdp_umem *umem = tx_ring->xsk_umem;
733 struct ixgbe_tx_buffer *tx_bi;
734 u32 xsk_frames = 0;
735
736 while (ntc != ntu) {
737 tx_bi = &tx_ring->tx_buffer_info[ntc];
738
739 if (tx_bi->xdpf)
740 ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi);
741 else
742 xsk_frames++;
743
744 tx_bi->xdpf = NULL;
745
746 ntc++;
747 if (ntc == tx_ring->count)
748 ntc = 0;
749 }
750
751 if (xsk_frames)
752 xsk_umem_complete_tx(umem, xsk_frames);
753 }