aq_ring.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/* Atlantic Network Driver
  3 *
  4 * Copyright (C) 2014-2019 aQuantia Corporation
  5 * Copyright (C) 2019-2020 Marvell International Ltd.
  6 */
  7
  8/* File aq_ring.c: Definition of functions for Rx/Tx rings. */
  9
 10#include "aq_nic.h"
 11#include "aq_hw.h"
 12#include "aq_hw_utils.h"
 13#include "aq_ptp.h"
 14#include "aq_vec.h"
 15#include "aq_main.h"
 16
 17#include <net/xdp.h>
 18#include <linux/filter.h>
 19#include <linux/bpf_trace.h>
 20#include <linux/netdevice.h>
 21#include <linux/etherdevice.h>
 22
 23static void aq_get_rxpages_xdp(struct aq_ring_buff_s *buff,
 24			       struct xdp_buff *xdp)
 25{
 26	struct skb_shared_info *sinfo;
 27	int i;
 28
 29	if (xdp_buff_has_frags(xdp)) {
 30		sinfo = xdp_get_shared_info_from_buff(xdp);
 31
 32		for (i = 0; i < sinfo->nr_frags; i++) {
 33			skb_frag_t *frag = &sinfo->frags[i];
 34
 35			page_ref_inc(skb_frag_page(frag));
 36		}
 37	}
 38	page_ref_inc(buff->rxdata.page);
 39}
 40
 41static inline void aq_free_rxpage(struct aq_rxpage *rxpage, struct device *dev)
 42{
 43	unsigned int len = PAGE_SIZE << rxpage->order;
 44
 45	dma_unmap_page(dev, rxpage->daddr, len, DMA_FROM_DEVICE);
 46
 47	/* Drop the ref for being in the ring. */
 48	__free_pages(rxpage->page, rxpage->order);
 49	rxpage->page = NULL;
 50}
 51
 52static int aq_alloc_rxpages(struct aq_rxpage *rxpage, struct aq_ring_s *rx_ring)
 53{
 54	struct device *dev = aq_nic_get_dev(rx_ring->aq_nic);
 55	unsigned int order = rx_ring->page_order;
 56	struct page *page;
 57	int ret = -ENOMEM;
 58	dma_addr_t daddr;
 59
 60	page = dev_alloc_pages(order);
 61	if (unlikely(!page))
 62		goto err_exit;
 63
 64	daddr = dma_map_page(dev, page, 0, PAGE_SIZE << order,
 65			     DMA_FROM_DEVICE);
 66
 67	if (unlikely(dma_mapping_error(dev, daddr)))
 68		goto free_page;
 69
 70	rxpage->page = page;
 71	rxpage->daddr = daddr;
 72	rxpage->order = order;
 73	rxpage->pg_off = rx_ring->page_offset;
 74
 75	return 0;
 76
 77free_page:
 78	__free_pages(page, order);
 79
 80err_exit:
 81	return ret;
 82}
 83
 84static int aq_get_rxpages(struct aq_ring_s *self, struct aq_ring_buff_s *rxbuf)
 85{
 86	unsigned int order = self->page_order;
 87	u16 page_offset = self->page_offset;
 88	u16 frame_max = self->frame_max;
 89	u16 tail_size = self->tail_size;
 90	int ret;
 91
 92	if (rxbuf->rxdata.page) {
 93		/* One means ring is the only user and can reuse */
 94		if (page_ref_count(rxbuf->rxdata.page) > 1) {
 95			/* Try reuse buffer */
 96			rxbuf->rxdata.pg_off += frame_max + page_offset +
 97						tail_size;
 98			if (rxbuf->rxdata.pg_off + frame_max + tail_size <=
 99			    (PAGE_SIZE << order)) {
100				u64_stats_update_begin(&self->stats.rx.syncp);
101				self->stats.rx.pg_flips++;
102				u64_stats_update_end(&self->stats.rx.syncp);
103
104			} else {
105				/* Buffer exhausted. We have other users and
106				 * should release this page and realloc
107				 */
108				aq_free_rxpage(&rxbuf->rxdata,
109					       aq_nic_get_dev(self->aq_nic));
110				u64_stats_update_begin(&self->stats.rx.syncp);
111				self->stats.rx.pg_losts++;
112				u64_stats_update_end(&self->stats.rx.syncp);
113			}
114		} else {
115			rxbuf->rxdata.pg_off = page_offset;
116			u64_stats_update_begin(&self->stats.rx.syncp);
117			self->stats.rx.pg_reuses++;
118			u64_stats_update_end(&self->stats.rx.syncp);
119		}
120	}
121
122	if (!rxbuf->rxdata.page) {
123		ret = aq_alloc_rxpages(&rxbuf->rxdata, self);
124		if (ret) {
125			u64_stats_update_begin(&self->stats.rx.syncp);
126			self->stats.rx.alloc_fails++;
127			u64_stats_update_end(&self->stats.rx.syncp);
128		}
129		return ret;
130	}
131
132	return 0;
133}
134
135static int aq_ring_alloc(struct aq_ring_s *self,
136			 struct aq_nic_s *aq_nic)
137{
138	int err = 0;
139
140	self->buff_ring =
141		kcalloc(self->size, sizeof(struct aq_ring_buff_s), GFP_KERNEL);
142
143	if (!self->buff_ring) {
144		err = -ENOMEM;
145		goto err_exit;
146	}
147
148	self->dx_ring = dma_alloc_coherent(aq_nic_get_dev(aq_nic),
149					   self->size * self->dx_size,
150					   &self->dx_ring_pa, GFP_KERNEL);
151	if (!self->dx_ring) {
152		err = -ENOMEM;
153		goto err_exit;
154	}
155
156err_exit:
157	if (err < 0) {
158		aq_ring_free(self);
159	}
160
161	return err;
162}
163
164int aq_ring_tx_alloc(struct aq_ring_s *self,
165		     struct aq_nic_s *aq_nic,
166		     unsigned int idx,
167		     struct aq_nic_cfg_s *aq_nic_cfg)
168{
169	self->aq_nic = aq_nic;
170	self->idx = idx;
171	self->size = aq_nic_cfg->txds;
172	self->dx_size = aq_nic_cfg->aq_hw_caps->txd_size;
173
174	return aq_ring_alloc(self, aq_nic);
175}
176
177int aq_ring_rx_alloc(struct aq_ring_s *self,
178		     struct aq_nic_s *aq_nic,
179		     unsigned int idx,
180		     struct aq_nic_cfg_s *aq_nic_cfg)
181{
182	self->aq_nic = aq_nic;
183	self->idx = idx;
184	self->size = aq_nic_cfg->rxds;
185	self->dx_size = aq_nic_cfg->aq_hw_caps->rxd_size;
186	self->xdp_prog = aq_nic->xdp_prog;
187	self->frame_max = AQ_CFG_RX_FRAME_MAX;
188
189	/* Only order-2 is allowed if XDP is enabled */
190	if (READ_ONCE(self->xdp_prog)) {
191		self->page_offset = AQ_XDP_HEADROOM;
192		self->page_order = AQ_CFG_XDP_PAGEORDER;
193		self->tail_size = AQ_XDP_TAILROOM;
194	} else {
195		self->page_offset = 0;
196		self->page_order = fls(self->frame_max / PAGE_SIZE +
197				       (self->frame_max % PAGE_SIZE ? 1 : 0)) - 1;
198		if (aq_nic_cfg->rxpageorder > self->page_order)
199			self->page_order = aq_nic_cfg->rxpageorder;
200		self->tail_size = 0;
201	}
202
203	return aq_ring_alloc(self, aq_nic);
204}
205
206int
207aq_ring_hwts_rx_alloc(struct aq_ring_s *self, struct aq_nic_s *aq_nic,
208		      unsigned int idx, unsigned int size, unsigned int dx_size)
209{
210	struct device *dev = aq_nic_get_dev(aq_nic);
211	size_t sz = size * dx_size + AQ_CFG_RXDS_DEF;
212
213	memset(self, 0, sizeof(*self));
214
215	self->aq_nic = aq_nic;
216	self->idx = idx;
217	self->size = size;
218	self->dx_size = dx_size;
219
220	self->dx_ring = dma_alloc_coherent(dev, sz, &self->dx_ring_pa,
221					   GFP_KERNEL);
222	if (!self->dx_ring) {
223		aq_ring_free(self);
224		return -ENOMEM;
225	}
226
227	return 0;
228}
229
230int aq_ring_init(struct aq_ring_s *self, const enum atl_ring_type ring_type)
231{
232	self->hw_head = 0;
233	self->sw_head = 0;
234	self->sw_tail = 0;
235	self->ring_type = ring_type;
236
237	if (self->ring_type == ATL_RING_RX)
238		u64_stats_init(&self->stats.rx.syncp);
239	else
240		u64_stats_init(&self->stats.tx.syncp);
241
242	return 0;
243}
244
245static inline bool aq_ring_dx_in_range(unsigned int h, unsigned int i,
246				       unsigned int t)
247{
248	return (h < t) ? ((h < i) && (i < t)) : ((h < i) || (i < t));
249}
250
251void aq_ring_update_queue_state(struct aq_ring_s *ring)
252{
253	if (aq_ring_avail_dx(ring) <= AQ_CFG_SKB_FRAGS_MAX)
254		aq_ring_queue_stop(ring);
255	else if (aq_ring_avail_dx(ring) > AQ_CFG_RESTART_DESC_THRES)
256		aq_ring_queue_wake(ring);
257}
258
259void aq_ring_queue_wake(struct aq_ring_s *ring)
260{
261	struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic);
262
263	if (__netif_subqueue_stopped(ndev,
264				     AQ_NIC_RING2QMAP(ring->aq_nic,
265						      ring->idx))) {
266		netif_wake_subqueue(ndev,
267				    AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx));
268		u64_stats_update_begin(&ring->stats.tx.syncp);
269		ring->stats.tx.queue_restarts++;
270		u64_stats_update_end(&ring->stats.tx.syncp);
271	}
272}
273
274void aq_ring_queue_stop(struct aq_ring_s *ring)
275{
276	struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic);
277
278	if (!__netif_subqueue_stopped(ndev,
279				      AQ_NIC_RING2QMAP(ring->aq_nic,
280						       ring->idx)))
281		netif_stop_subqueue(ndev,
282				    AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx));
283}
284
285bool aq_ring_tx_clean(struct aq_ring_s *self)
286{
287	struct device *dev = aq_nic_get_dev(self->aq_nic);
288	unsigned int budget;
289
290	for (budget = AQ_CFG_TX_CLEAN_BUDGET;
291	     budget && self->sw_head != self->hw_head; budget--) {
292		struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
293
294		if (likely(buff->is_mapped)) {
295			if (unlikely(buff->is_sop)) {
296				if (!buff->is_eop &&
297				    buff->eop_index != 0xffffU &&
298				    (!aq_ring_dx_in_range(self->sw_head,
299						buff->eop_index,
300						self->hw_head)))
301					break;
302
303				dma_unmap_single(dev, buff->pa, buff->len,
304						 DMA_TO_DEVICE);
305			} else {
306				dma_unmap_page(dev, buff->pa, buff->len,
307					       DMA_TO_DEVICE);
308			}
309		}
310
311		if (likely(!buff->is_eop))
312			goto out;
313
314		if (buff->skb) {
315			u64_stats_update_begin(&self->stats.tx.syncp);
316			++self->stats.tx.packets;
317			self->stats.tx.bytes += buff->skb->len;
318			u64_stats_update_end(&self->stats.tx.syncp);
319			dev_kfree_skb_any(buff->skb);
320		} else if (buff->xdpf) {
321			u64_stats_update_begin(&self->stats.tx.syncp);
322			++self->stats.tx.packets;
323			self->stats.tx.bytes += xdp_get_frame_len(buff->xdpf);
324			u64_stats_update_end(&self->stats.tx.syncp);
325			xdp_return_frame_rx_napi(buff->xdpf);
326		}
327
328out:
329		buff->skb = NULL;
330		buff->xdpf = NULL;
331		buff->pa = 0U;
332		buff->eop_index = 0xffffU;
333		self->sw_head = aq_ring_next_dx(self, self->sw_head);
334	}
335
336	return !!budget;
337}
338
339static void aq_rx_checksum(struct aq_ring_s *self,
340			   struct aq_ring_buff_s *buff,
341			   struct sk_buff *skb)
342{
343	if (!(self->aq_nic->ndev->features & NETIF_F_RXCSUM))
344		return;
345
346	if (unlikely(buff->is_cso_err)) {
347		u64_stats_update_begin(&self->stats.rx.syncp);
348		++self->stats.rx.errors;
349		u64_stats_update_end(&self->stats.rx.syncp);
350		skb->ip_summed = CHECKSUM_NONE;
351		return;
352	}
353	if (buff->is_ip_cso) {
354		__skb_incr_checksum_unnecessary(skb);
355	} else {
356		skb->ip_summed = CHECKSUM_NONE;
357	}
358
359	if (buff->is_udp_cso || buff->is_tcp_cso)
360		__skb_incr_checksum_unnecessary(skb);
361}
362
363int aq_xdp_xmit(struct net_device *dev, int num_frames,
364		struct xdp_frame **frames, u32 flags)
365{
366	struct aq_nic_s *aq_nic = netdev_priv(dev);
367	unsigned int vec, i, drop = 0;
368	int cpu = smp_processor_id();
369	struct aq_nic_cfg_s *aq_cfg;
370	struct aq_ring_s *ring;
371
372	aq_cfg = aq_nic_get_cfg(aq_nic);
373	vec = cpu % aq_cfg->vecs;
374	ring = aq_nic->aq_ring_tx[AQ_NIC_CFG_TCVEC2RING(aq_cfg, 0, vec)];
375
376	for (i = 0; i < num_frames; i++) {
377		struct xdp_frame *xdpf = frames[i];
378
379		if (aq_nic_xmit_xdpf(aq_nic, ring, xdpf) == NETDEV_TX_BUSY)
380			drop++;
381	}
382
383	return num_frames - drop;
384}
385
386static struct sk_buff *aq_xdp_build_skb(struct xdp_buff *xdp,
387					struct net_device *dev,
388					struct aq_ring_buff_s *buff)
389{
390	struct xdp_frame *xdpf;
391	struct sk_buff *skb;
392
393	xdpf = xdp_convert_buff_to_frame(xdp);
394	if (unlikely(!xdpf))
395		return NULL;
396
397	skb = xdp_build_skb_from_frame(xdpf, dev);
398	if (!skb)
399		return NULL;
400
401	aq_get_rxpages_xdp(buff, xdp);
402	return skb;
403}
404
405static struct sk_buff *aq_xdp_run_prog(struct aq_nic_s *aq_nic,
406				       struct xdp_buff *xdp,
407				       struct aq_ring_s *rx_ring,
408				       struct aq_ring_buff_s *buff)
409{
410	int result = NETDEV_TX_BUSY;
411	struct aq_ring_s *tx_ring;
412	struct xdp_frame *xdpf;
413	struct bpf_prog *prog;
414	u32 act = XDP_ABORTED;
415	struct sk_buff *skb;
416
417	u64_stats_update_begin(&rx_ring->stats.rx.syncp);
418	++rx_ring->stats.rx.packets;
419	rx_ring->stats.rx.bytes += xdp_get_buff_len(xdp);
420	u64_stats_update_end(&rx_ring->stats.rx.syncp);
421
422	prog = READ_ONCE(rx_ring->xdp_prog);
423	if (!prog)
424		return aq_xdp_build_skb(xdp, aq_nic->ndev, buff);
425
426	prefetchw(xdp->data_hard_start); /* xdp_frame write */
427
428	/* single buffer XDP program, but packet is multi buffer, aborted */
429	if (xdp_buff_has_frags(xdp) && !prog->aux->xdp_has_frags)
430		goto out_aborted;
431
432	act = bpf_prog_run_xdp(prog, xdp);
433	switch (act) {
434	case XDP_PASS:
435		skb = aq_xdp_build_skb(xdp, aq_nic->ndev, buff);
436		if (!skb)
437			goto out_aborted;
438		u64_stats_update_begin(&rx_ring->stats.rx.syncp);
439		++rx_ring->stats.rx.xdp_pass;
440		u64_stats_update_end(&rx_ring->stats.rx.syncp);
441		return skb;
442	case XDP_TX:
443		xdpf = xdp_convert_buff_to_frame(xdp);
444		if (unlikely(!xdpf))
445			goto out_aborted;
446		tx_ring = aq_nic->aq_ring_tx[rx_ring->idx];
447		result = aq_nic_xmit_xdpf(aq_nic, tx_ring, xdpf);
448		if (result == NETDEV_TX_BUSY)
449			goto out_aborted;
450		u64_stats_update_begin(&rx_ring->stats.rx.syncp);
451		++rx_ring->stats.rx.xdp_tx;
452		u64_stats_update_end(&rx_ring->stats.rx.syncp);
453		aq_get_rxpages_xdp(buff, xdp);
454		break;
455	case XDP_REDIRECT:
456		if (xdp_do_redirect(aq_nic->ndev, xdp, prog) < 0)
457			goto out_aborted;
458		xdp_do_flush();
459		u64_stats_update_begin(&rx_ring->stats.rx.syncp);
460		++rx_ring->stats.rx.xdp_redirect;
461		u64_stats_update_end(&rx_ring->stats.rx.syncp);
462		aq_get_rxpages_xdp(buff, xdp);
463		break;
464	default:
465		fallthrough;
466	case XDP_ABORTED:
467out_aborted:
468		u64_stats_update_begin(&rx_ring->stats.rx.syncp);
469		++rx_ring->stats.rx.xdp_aborted;
470		u64_stats_update_end(&rx_ring->stats.rx.syncp);
471		trace_xdp_exception(aq_nic->ndev, prog, act);
472		bpf_warn_invalid_xdp_action(aq_nic->ndev, prog, act);
473		break;
474	case XDP_DROP:
475		u64_stats_update_begin(&rx_ring->stats.rx.syncp);
476		++rx_ring->stats.rx.xdp_drop;
477		u64_stats_update_end(&rx_ring->stats.rx.syncp);
478		break;
479	}
480
481	return ERR_PTR(-result);
482}
483
484static bool aq_add_rx_fragment(struct device *dev,
485			       struct aq_ring_s *ring,
486			       struct aq_ring_buff_s *buff,
487			       struct xdp_buff *xdp)
488{
489	struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
490	struct aq_ring_buff_s *buff_ = buff;
491
492	memset(sinfo, 0, sizeof(*sinfo));
493	do {
494		skb_frag_t *frag;
495
496		if (unlikely(sinfo->nr_frags >= MAX_SKB_FRAGS))
497			return true;
498
499		frag = &sinfo->frags[sinfo->nr_frags++];
500		buff_ = &ring->buff_ring[buff_->next];
501		dma_sync_single_range_for_cpu(dev,
502					      buff_->rxdata.daddr,
503					      buff_->rxdata.pg_off,
504					      buff_->len,
505					      DMA_FROM_DEVICE);
506		sinfo->xdp_frags_size += buff_->len;
507		skb_frag_fill_page_desc(frag, buff_->rxdata.page,
508					buff_->rxdata.pg_off,
509					buff_->len);
510
511		buff_->is_cleaned = 1;
512
513		buff->is_ip_cso &= buff_->is_ip_cso;
514		buff->is_udp_cso &= buff_->is_udp_cso;
515		buff->is_tcp_cso &= buff_->is_tcp_cso;
516		buff->is_cso_err |= buff_->is_cso_err;
517
518		if (page_is_pfmemalloc(buff_->rxdata.page))
519			xdp_buff_set_frag_pfmemalloc(xdp);
520
521	} while (!buff_->is_eop);
522
523	xdp_buff_set_frags_flag(xdp);
524
525	return false;
526}
527
528static int __aq_ring_rx_clean(struct aq_ring_s *self, struct napi_struct *napi,
529			      int *work_done, int budget)
530{
531	struct net_device *ndev = aq_nic_get_ndev(self->aq_nic);
532	int err = 0;
533
534	for (; (self->sw_head != self->hw_head) && budget;
535		self->sw_head = aq_ring_next_dx(self, self->sw_head),
536		--budget, ++(*work_done)) {
537		struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
538		bool is_ptp_ring = aq_ptp_ring(self->aq_nic, self);
539		struct aq_ring_buff_s *buff_ = NULL;
540		struct sk_buff *skb = NULL;
541		unsigned int next_ = 0U;
542		unsigned int i = 0U;
543		u16 hdr_len;
544
545		if (buff->is_cleaned)
546			continue;
547
548		if (!buff->is_eop) {
549			unsigned int frag_cnt = 0U;
550
551			/* There will be an extra fragment */
552			if (buff->len > AQ_CFG_RX_HDR_SIZE)
553				frag_cnt++;
554
555			buff_ = buff;
556			do {
557				bool is_rsc_completed = true;
558
559				if (buff_->next >= self->size) {
560					err = -EIO;
561					goto err_exit;
562				}
563
564				frag_cnt++;
565				next_ = buff_->next;
566				buff_ = &self->buff_ring[next_];
567				is_rsc_completed =
568					aq_ring_dx_in_range(self->sw_head,
569							    next_,
570							    self->hw_head);
571
572				if (unlikely(!is_rsc_completed) ||
573						frag_cnt > MAX_SKB_FRAGS) {
574					err = 0;
575					goto err_exit;
576				}
577
578				buff->is_error |= buff_->is_error;
579				buff->is_cso_err |= buff_->is_cso_err;
580
581			} while (!buff_->is_eop);
582
583			if (buff->is_error ||
584			    (buff->is_lro && buff->is_cso_err)) {
585				buff_ = buff;
586				do {
587					if (buff_->next >= self->size) {
588						err = -EIO;
589						goto err_exit;
590					}
591					next_ = buff_->next;
592					buff_ = &self->buff_ring[next_];
593
594					buff_->is_cleaned = true;
595				} while (!buff_->is_eop);
596
597				u64_stats_update_begin(&self->stats.rx.syncp);
598				++self->stats.rx.errors;
599				u64_stats_update_end(&self->stats.rx.syncp);
600				continue;
601			}
602		}
603
604		if (buff->is_error) {
605			u64_stats_update_begin(&self->stats.rx.syncp);
606			++self->stats.rx.errors;
607			u64_stats_update_end(&self->stats.rx.syncp);
608			continue;
609		}
610
611		dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),
612					      buff->rxdata.daddr,
613					      buff->rxdata.pg_off,
614					      buff->len, DMA_FROM_DEVICE);
615
616		skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE);
617		if (unlikely(!skb)) {
618			u64_stats_update_begin(&self->stats.rx.syncp);
619			self->stats.rx.skb_alloc_fails++;
620			u64_stats_update_end(&self->stats.rx.syncp);
621			err = -ENOMEM;
622			goto err_exit;
623		}
624		if (is_ptp_ring)
625			buff->len -=
626				aq_ptp_extract_ts(self->aq_nic, skb_hwtstamps(skb),
627						  aq_buf_vaddr(&buff->rxdata),
628						  buff->len);
629
630		hdr_len = buff->len;
631		if (hdr_len > AQ_CFG_RX_HDR_SIZE)
632			hdr_len = eth_get_headlen(skb->dev,
633						  aq_buf_vaddr(&buff->rxdata),
634						  AQ_CFG_RX_HDR_SIZE);
635
636		memcpy(__skb_put(skb, hdr_len), aq_buf_vaddr(&buff->rxdata),
637		       ALIGN(hdr_len, sizeof(long)));
638
639		if (buff->len - hdr_len > 0) {
640			skb_add_rx_frag(skb, i++, buff->rxdata.page,
641					buff->rxdata.pg_off + hdr_len,
642					buff->len - hdr_len,
643					self->frame_max);
644			page_ref_inc(buff->rxdata.page);
645		}
646
647		if (!buff->is_eop) {
648			buff_ = buff;
649			do {
650				next_ = buff_->next;
651				buff_ = &self->buff_ring[next_];
652
653				dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),
654							      buff_->rxdata.daddr,
655							      buff_->rxdata.pg_off,
656							      buff_->len,
657							      DMA_FROM_DEVICE);
658				skb_add_rx_frag(skb, i++,
659						buff_->rxdata.page,
660						buff_->rxdata.pg_off,
661						buff_->len,
662						self->frame_max);
663				page_ref_inc(buff_->rxdata.page);
664				buff_->is_cleaned = 1;
665
666				buff->is_ip_cso &= buff_->is_ip_cso;
667				buff->is_udp_cso &= buff_->is_udp_cso;
668				buff->is_tcp_cso &= buff_->is_tcp_cso;
669				buff->is_cso_err |= buff_->is_cso_err;
670
671			} while (!buff_->is_eop);
672		}
673
674		if (buff->is_vlan)
675			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
676					       buff->vlan_rx_tag);
677
678		skb->protocol = eth_type_trans(skb, ndev);
679
680		aq_rx_checksum(self, buff, skb);
681
682		skb_set_hash(skb, buff->rss_hash,
683			     buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :
684			     PKT_HASH_TYPE_NONE);
685		/* Send all PTP traffic to 0 queue */
686		skb_record_rx_queue(skb,
687				    is_ptp_ring ? 0
688						: AQ_NIC_RING2QMAP(self->aq_nic,
689								   self->idx));
690
691		u64_stats_update_begin(&self->stats.rx.syncp);
692		++self->stats.rx.packets;
693		self->stats.rx.bytes += skb->len;
694		u64_stats_update_end(&self->stats.rx.syncp);
695
696		napi_gro_receive(napi, skb);
697	}
698
699err_exit:
700	return err;
701}
702
703static int __aq_ring_xdp_clean(struct aq_ring_s *rx_ring,
704			       struct napi_struct *napi, int *work_done,
705			       int budget)
706{
707	int frame_sz = rx_ring->page_offset + rx_ring->frame_max +
708		       rx_ring->tail_size;
709	struct aq_nic_s *aq_nic = rx_ring->aq_nic;
710	bool is_rsc_completed = true;
711	struct device *dev;
712	int err = 0;
713
714	dev = aq_nic_get_dev(aq_nic);
715	for (; (rx_ring->sw_head != rx_ring->hw_head) && budget;
716		rx_ring->sw_head = aq_ring_next_dx(rx_ring, rx_ring->sw_head),
717		--budget, ++(*work_done)) {
718		struct aq_ring_buff_s *buff = &rx_ring->buff_ring[rx_ring->sw_head];
719		bool is_ptp_ring = aq_ptp_ring(rx_ring->aq_nic, rx_ring);
720		struct aq_ring_buff_s *buff_ = NULL;
721		u16 ptp_hwtstamp_len = 0;
722		struct skb_shared_hwtstamps shhwtstamps;
723		struct sk_buff *skb = NULL;
724		unsigned int next_ = 0U;
725		struct xdp_buff xdp;
726		void *hard_start;
727
728		if (buff->is_cleaned)
729			continue;
730
731		if (!buff->is_eop) {
732			buff_ = buff;
733			do {
734				if (buff_->next >= rx_ring->size) {
735					err = -EIO;
736					goto err_exit;
737				}
738				next_ = buff_->next;
739				buff_ = &rx_ring->buff_ring[next_];
740				is_rsc_completed =
741					aq_ring_dx_in_range(rx_ring->sw_head,
742							    next_,
743							    rx_ring->hw_head);
744
745				if (unlikely(!is_rsc_completed))
746					break;
747
748				buff->is_error |= buff_->is_error;
749				buff->is_cso_err |= buff_->is_cso_err;
750			} while (!buff_->is_eop);
751
752			if (!is_rsc_completed) {
753				err = 0;
754				goto err_exit;
755			}
756			if (buff->is_error ||
757			    (buff->is_lro && buff->is_cso_err)) {
758				buff_ = buff;
759				do {
760					if (buff_->next >= rx_ring->size) {
761						err = -EIO;
762						goto err_exit;
763					}
764					next_ = buff_->next;
765					buff_ = &rx_ring->buff_ring[next_];
766
767					buff_->is_cleaned = true;
768				} while (!buff_->is_eop);
769
770				u64_stats_update_begin(&rx_ring->stats.rx.syncp);
771				++rx_ring->stats.rx.errors;
772				u64_stats_update_end(&rx_ring->stats.rx.syncp);
773				continue;
774			}
775		}
776
777		if (buff->is_error) {
778			u64_stats_update_begin(&rx_ring->stats.rx.syncp);
779			++rx_ring->stats.rx.errors;
780			u64_stats_update_end(&rx_ring->stats.rx.syncp);
781			continue;
782		}
783
784		dma_sync_single_range_for_cpu(dev,
785					      buff->rxdata.daddr,
786					      buff->rxdata.pg_off,
787					      buff->len, DMA_FROM_DEVICE);
788		hard_start = page_address(buff->rxdata.page) +
789			     buff->rxdata.pg_off - rx_ring->page_offset;
790
791		if (is_ptp_ring) {
792			ptp_hwtstamp_len = aq_ptp_extract_ts(rx_ring->aq_nic, &shhwtstamps,
793							     aq_buf_vaddr(&buff->rxdata),
794							     buff->len);
795			buff->len -= ptp_hwtstamp_len;
796		}
797
798		xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
799		xdp_prepare_buff(&xdp, hard_start, rx_ring->page_offset,
800				 buff->len, false);
801		if (!buff->is_eop) {
802			if (aq_add_rx_fragment(dev, rx_ring, buff, &xdp)) {
803				u64_stats_update_begin(&rx_ring->stats.rx.syncp);
804				++rx_ring->stats.rx.packets;
805				rx_ring->stats.rx.bytes += xdp_get_buff_len(&xdp);
806				++rx_ring->stats.rx.xdp_aborted;
807				u64_stats_update_end(&rx_ring->stats.rx.syncp);
808				continue;
809			}
810		}
811
812		skb = aq_xdp_run_prog(aq_nic, &xdp, rx_ring, buff);
813		if (IS_ERR(skb) || !skb)
814			continue;
815
816		if (ptp_hwtstamp_len > 0)
817			*skb_hwtstamps(skb) = shhwtstamps;
818
819		if (buff->is_vlan)
820			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
821					       buff->vlan_rx_tag);
822
823		aq_rx_checksum(rx_ring, buff, skb);
824
825		skb_set_hash(skb, buff->rss_hash,
826			     buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :
827			     PKT_HASH_TYPE_NONE);
828		/* Send all PTP traffic to 0 queue */
829		skb_record_rx_queue(skb,
830				    is_ptp_ring ? 0
831						: AQ_NIC_RING2QMAP(rx_ring->aq_nic,
832								   rx_ring->idx));
833
834		napi_gro_receive(napi, skb);
835	}
836
837err_exit:
838	return err;
839}
840
841int aq_ring_rx_clean(struct aq_ring_s *self,
842		     struct napi_struct *napi,
843		     int *work_done,
844		     int budget)
845{
846	if (static_branch_unlikely(&aq_xdp_locking_key))
847		return __aq_ring_xdp_clean(self, napi, work_done, budget);
848	else
849		return __aq_ring_rx_clean(self, napi, work_done, budget);
850}
851
852void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic)
853{
854#if IS_REACHABLE(CONFIG_PTP_1588_CLOCK)
855	while (self->sw_head != self->hw_head) {
856		u64 ns;
857
858		aq_nic->aq_hw_ops->extract_hwts(aq_nic->aq_hw,
859						self->dx_ring +
860						(self->sw_head * self->dx_size),
861						self->dx_size, &ns);
862		aq_ptp_tx_hwtstamp(aq_nic, ns);
863
864		self->sw_head = aq_ring_next_dx(self, self->sw_head);
865	}
866#endif
867}
868
869int aq_ring_rx_fill(struct aq_ring_s *self)
870{
871	struct aq_ring_buff_s *buff = NULL;
872	int err = 0;
873	int i = 0;
874
875	if (aq_ring_avail_dx(self) < min_t(unsigned int, AQ_CFG_RX_REFILL_THRES,
876					   self->size / 2))
877		return err;
878
879	for (i = aq_ring_avail_dx(self); i--;
880		self->sw_tail = aq_ring_next_dx(self, self->sw_tail)) {
881		buff = &self->buff_ring[self->sw_tail];
882
883		buff->flags = 0U;
884		buff->len = self->frame_max;
885
886		err = aq_get_rxpages(self, buff);
887		if (err)
888			goto err_exit;
889
890		buff->pa = aq_buf_daddr(&buff->rxdata);
891		buff = NULL;
892	}
893
894err_exit:
895	return err;
896}
897
898void aq_ring_rx_deinit(struct aq_ring_s *self)
899{
900	if (!self)
901		return;
902
903	for (; self->sw_head != self->sw_tail;
904		self->sw_head = aq_ring_next_dx(self, self->sw_head)) {
905		struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
906
907		aq_free_rxpage(&buff->rxdata, aq_nic_get_dev(self->aq_nic));
908	}
909}
910
911void aq_ring_free(struct aq_ring_s *self)
912{
913	if (!self)
914		return;
915
916	kfree(self->buff_ring);
917	self->buff_ring = NULL;
918
919	if (self->dx_ring) {
920		dma_free_coherent(aq_nic_get_dev(self->aq_nic),
921				  self->size * self->dx_size, self->dx_ring,
922				  self->dx_ring_pa);
923		self->dx_ring = NULL;
924	}
925}
926
927void aq_ring_hwts_rx_free(struct aq_ring_s *self)
928{
929	if (!self)
930		return;
931
932	if (self->dx_ring) {
933		dma_free_coherent(aq_nic_get_dev(self->aq_nic),
934				  self->size * self->dx_size + AQ_CFG_RXDS_DEF,
935				  self->dx_ring, self->dx_ring_pa);
936		self->dx_ring = NULL;
937	}
938}
939
940unsigned int aq_ring_fill_stats_data(struct aq_ring_s *self, u64 *data)
941{
942	unsigned int count;
943	unsigned int start;
944
945	if (self->ring_type == ATL_RING_RX) {
946		/* This data should mimic aq_ethtool_queue_rx_stat_names structure */
947		do {
948			count = 0;
949			start = u64_stats_fetch_begin(&self->stats.rx.syncp);
950			data[count] = self->stats.rx.packets;
951			data[++count] = self->stats.rx.jumbo_packets;
952			data[++count] = self->stats.rx.lro_packets;
953			data[++count] = self->stats.rx.errors;
954			data[++count] = self->stats.rx.alloc_fails;
955			data[++count] = self->stats.rx.skb_alloc_fails;
956			data[++count] = self->stats.rx.polls;
957			data[++count] = self->stats.rx.pg_flips;
958			data[++count] = self->stats.rx.pg_reuses;
959			data[++count] = self->stats.rx.pg_losts;
960			data[++count] = self->stats.rx.xdp_aborted;
961			data[++count] = self->stats.rx.xdp_drop;
962			data[++count] = self->stats.rx.xdp_pass;
963			data[++count] = self->stats.rx.xdp_tx;
964			data[++count] = self->stats.rx.xdp_invalid;
965			data[++count] = self->stats.rx.xdp_redirect;
966		} while (u64_stats_fetch_retry(&self->stats.rx.syncp, start));
967	} else {
968		/* This data should mimic aq_ethtool_queue_tx_stat_names structure */
969		do {
970			count = 0;
971			start = u64_stats_fetch_begin(&self->stats.tx.syncp);
972			data[count] = self->stats.tx.packets;
973			data[++count] = self->stats.tx.queue_restarts;
974		} while (u64_stats_fetch_retry(&self->stats.tx.syncp, start));
975	}
976
977	return ++count;
978}