1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Atlantic Network Driver
4 * Copyright (C) 2014-2019 aQuantia Corporation
5 * Copyright (C) 2019-2020 Marvell International Ltd.
8 /* File aq_ring.c: Definition of functions for Rx/Tx rings. */
12 #include "aq_hw_utils.h"
18 #include <linux/filter.h>
19 #include <linux/bpf_trace.h>
20 #include <linux/netdevice.h>
21 #include <linux/etherdevice.h>
23 static void aq_get_rxpages_xdp(struct aq_ring_buff_s *buff,
26 struct skb_shared_info *sinfo;
29 if (xdp_buff_has_frags(xdp)) {
30 sinfo = xdp_get_shared_info_from_buff(xdp);
32 for (i = 0; i < sinfo->nr_frags; i++) {
33 skb_frag_t *frag = &sinfo->frags[i];
35 page_ref_inc(skb_frag_page(frag));
38 page_ref_inc(buff->rxdata.page);
41 static inline void aq_free_rxpage(struct aq_rxpage *rxpage, struct device *dev)
43 unsigned int len = PAGE_SIZE << rxpage->order;
45 dma_unmap_page(dev, rxpage->daddr, len, DMA_FROM_DEVICE);
47 /* Drop the ref for being in the ring. */
48 __free_pages(rxpage->page, rxpage->order);
52 static int aq_alloc_rxpages(struct aq_rxpage *rxpage, struct aq_ring_s *rx_ring)
54 struct device *dev = aq_nic_get_dev(rx_ring->aq_nic);
55 unsigned int order = rx_ring->page_order;
60 page = dev_alloc_pages(order);
64 daddr = dma_map_page(dev, page, 0, PAGE_SIZE << order,
67 if (unlikely(dma_mapping_error(dev, daddr)))
71 rxpage->daddr = daddr;
72 rxpage->order = order;
73 rxpage->pg_off = rx_ring->page_offset;
78 __free_pages(page, order);
84 static int aq_get_rxpages(struct aq_ring_s *self, struct aq_ring_buff_s *rxbuf)
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;
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 +
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);
105 /* Buffer exhausted. We have other users and
106 * should release this page and realloc
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);
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);
122 if (!rxbuf->rxdata.page) {
123 ret = aq_alloc_rxpages(&rxbuf->rxdata, self);
125 u64_stats_update_begin(&self->stats.rx.syncp);
126 self->stats.rx.alloc_fails++;
127 u64_stats_update_end(&self->stats.rx.syncp);
135 static struct aq_ring_s *aq_ring_alloc(struct aq_ring_s *self,
136 struct aq_nic_s *aq_nic)
141 kcalloc(self->size, sizeof(struct aq_ring_buff_s), GFP_KERNEL);
143 if (!self->buff_ring) {
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) {
165 struct aq_ring_s *aq_ring_tx_alloc(struct aq_ring_s *self,
166 struct aq_nic_s *aq_nic,
168 struct aq_nic_cfg_s *aq_nic_cfg)
172 self->aq_nic = aq_nic;
174 self->size = aq_nic_cfg->txds;
175 self->dx_size = aq_nic_cfg->aq_hw_caps->txd_size;
177 self = aq_ring_alloc(self, aq_nic);
192 struct aq_ring_s *aq_ring_rx_alloc(struct aq_ring_s *self,
193 struct aq_nic_s *aq_nic,
195 struct aq_nic_cfg_s *aq_nic_cfg)
199 self->aq_nic = aq_nic;
201 self->size = aq_nic_cfg->rxds;
202 self->dx_size = aq_nic_cfg->aq_hw_caps->rxd_size;
203 self->xdp_prog = aq_nic->xdp_prog;
204 self->frame_max = AQ_CFG_RX_FRAME_MAX;
206 /* Only order-2 is allowed if XDP is enabled */
207 if (READ_ONCE(self->xdp_prog)) {
208 self->page_offset = AQ_XDP_HEADROOM;
209 self->page_order = AQ_CFG_XDP_PAGEORDER;
210 self->tail_size = AQ_XDP_TAILROOM;
212 self->page_offset = 0;
213 self->page_order = fls(self->frame_max / PAGE_SIZE +
214 (self->frame_max % PAGE_SIZE ? 1 : 0)) - 1;
215 if (aq_nic_cfg->rxpageorder > self->page_order)
216 self->page_order = aq_nic_cfg->rxpageorder;
220 self = aq_ring_alloc(self, aq_nic);
236 aq_ring_hwts_rx_alloc(struct aq_ring_s *self, struct aq_nic_s *aq_nic,
237 unsigned int idx, unsigned int size, unsigned int dx_size)
239 struct device *dev = aq_nic_get_dev(aq_nic);
240 size_t sz = size * dx_size + AQ_CFG_RXDS_DEF;
242 memset(self, 0, sizeof(*self));
244 self->aq_nic = aq_nic;
247 self->dx_size = dx_size;
249 self->dx_ring = dma_alloc_coherent(dev, sz, &self->dx_ring_pa,
251 if (!self->dx_ring) {
259 int aq_ring_init(struct aq_ring_s *self, const enum atl_ring_type ring_type)
264 self->ring_type = ring_type;
266 if (self->ring_type == ATL_RING_RX)
267 u64_stats_init(&self->stats.rx.syncp);
269 u64_stats_init(&self->stats.tx.syncp);
274 static inline bool aq_ring_dx_in_range(unsigned int h, unsigned int i,
277 return (h < t) ? ((h < i) && (i < t)) : ((h < i) || (i < t));
280 void aq_ring_update_queue_state(struct aq_ring_s *ring)
282 if (aq_ring_avail_dx(ring) <= AQ_CFG_SKB_FRAGS_MAX)
283 aq_ring_queue_stop(ring);
284 else if (aq_ring_avail_dx(ring) > AQ_CFG_RESTART_DESC_THRES)
285 aq_ring_queue_wake(ring);
288 void aq_ring_queue_wake(struct aq_ring_s *ring)
290 struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic);
292 if (__netif_subqueue_stopped(ndev,
293 AQ_NIC_RING2QMAP(ring->aq_nic,
295 netif_wake_subqueue(ndev,
296 AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx));
297 u64_stats_update_begin(&ring->stats.tx.syncp);
298 ring->stats.tx.queue_restarts++;
299 u64_stats_update_end(&ring->stats.tx.syncp);
303 void aq_ring_queue_stop(struct aq_ring_s *ring)
305 struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic);
307 if (!__netif_subqueue_stopped(ndev,
308 AQ_NIC_RING2QMAP(ring->aq_nic,
310 netif_stop_subqueue(ndev,
311 AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx));
314 bool aq_ring_tx_clean(struct aq_ring_s *self)
316 struct device *dev = aq_nic_get_dev(self->aq_nic);
319 for (budget = AQ_CFG_TX_CLEAN_BUDGET;
320 budget && self->sw_head != self->hw_head; budget--) {
321 struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
323 if (likely(buff->is_mapped)) {
324 if (unlikely(buff->is_sop)) {
326 buff->eop_index != 0xffffU &&
327 (!aq_ring_dx_in_range(self->sw_head,
332 dma_unmap_single(dev, buff->pa, buff->len,
335 dma_unmap_page(dev, buff->pa, buff->len,
340 if (likely(!buff->is_eop))
344 u64_stats_update_begin(&self->stats.tx.syncp);
345 ++self->stats.tx.packets;
346 self->stats.tx.bytes += buff->skb->len;
347 u64_stats_update_end(&self->stats.tx.syncp);
348 dev_kfree_skb_any(buff->skb);
349 } else if (buff->xdpf) {
350 u64_stats_update_begin(&self->stats.tx.syncp);
351 ++self->stats.tx.packets;
352 self->stats.tx.bytes += xdp_get_frame_len(buff->xdpf);
353 u64_stats_update_end(&self->stats.tx.syncp);
354 xdp_return_frame_rx_napi(buff->xdpf);
361 buff->eop_index = 0xffffU;
362 self->sw_head = aq_ring_next_dx(self, self->sw_head);
368 static void aq_rx_checksum(struct aq_ring_s *self,
369 struct aq_ring_buff_s *buff,
372 if (!(self->aq_nic->ndev->features & NETIF_F_RXCSUM))
375 if (unlikely(buff->is_cso_err)) {
376 u64_stats_update_begin(&self->stats.rx.syncp);
377 ++self->stats.rx.errors;
378 u64_stats_update_end(&self->stats.rx.syncp);
379 skb->ip_summed = CHECKSUM_NONE;
382 if (buff->is_ip_cso) {
383 __skb_incr_checksum_unnecessary(skb);
385 skb->ip_summed = CHECKSUM_NONE;
388 if (buff->is_udp_cso || buff->is_tcp_cso)
389 __skb_incr_checksum_unnecessary(skb);
392 int aq_xdp_xmit(struct net_device *dev, int num_frames,
393 struct xdp_frame **frames, u32 flags)
395 struct aq_nic_s *aq_nic = netdev_priv(dev);
396 unsigned int vec, i, drop = 0;
397 int cpu = smp_processor_id();
398 struct aq_nic_cfg_s *aq_cfg;
399 struct aq_ring_s *ring;
401 aq_cfg = aq_nic_get_cfg(aq_nic);
402 vec = cpu % aq_cfg->vecs;
403 ring = aq_nic->aq_ring_tx[AQ_NIC_CFG_TCVEC2RING(aq_cfg, 0, vec)];
405 for (i = 0; i < num_frames; i++) {
406 struct xdp_frame *xdpf = frames[i];
408 if (aq_nic_xmit_xdpf(aq_nic, ring, xdpf) == NETDEV_TX_BUSY)
412 return num_frames - drop;
415 static struct sk_buff *aq_xdp_run_prog(struct aq_nic_s *aq_nic,
416 struct xdp_buff *xdp,
417 struct aq_ring_s *rx_ring,
418 struct aq_ring_buff_s *buff)
420 int result = NETDEV_TX_BUSY;
421 struct aq_ring_s *tx_ring;
422 struct xdp_frame *xdpf;
423 struct bpf_prog *prog;
424 u32 act = XDP_ABORTED;
427 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
428 ++rx_ring->stats.rx.packets;
429 rx_ring->stats.rx.bytes += xdp_get_buff_len(xdp);
430 u64_stats_update_end(&rx_ring->stats.rx.syncp);
432 prog = READ_ONCE(rx_ring->xdp_prog);
436 prefetchw(xdp->data_hard_start); /* xdp_frame write */
438 /* single buffer XDP program, but packet is multi buffer, aborted */
439 if (xdp_buff_has_frags(xdp) && !prog->aux->xdp_has_frags)
442 act = bpf_prog_run_xdp(prog, xdp);
446 xdpf = xdp_convert_buff_to_frame(xdp);
449 skb = xdp_build_skb_from_frame(xdpf, aq_nic->ndev);
452 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
453 ++rx_ring->stats.rx.xdp_pass;
454 u64_stats_update_end(&rx_ring->stats.rx.syncp);
455 aq_get_rxpages_xdp(buff, xdp);
458 xdpf = xdp_convert_buff_to_frame(xdp);
461 tx_ring = aq_nic->aq_ring_tx[rx_ring->idx];
462 result = aq_nic_xmit_xdpf(aq_nic, tx_ring, xdpf);
463 if (result == NETDEV_TX_BUSY)
465 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
466 ++rx_ring->stats.rx.xdp_tx;
467 u64_stats_update_end(&rx_ring->stats.rx.syncp);
468 aq_get_rxpages_xdp(buff, xdp);
471 if (xdp_do_redirect(aq_nic->ndev, xdp, prog) < 0)
474 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
475 ++rx_ring->stats.rx.xdp_redirect;
476 u64_stats_update_end(&rx_ring->stats.rx.syncp);
477 aq_get_rxpages_xdp(buff, xdp);
483 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
484 ++rx_ring->stats.rx.xdp_aborted;
485 u64_stats_update_end(&rx_ring->stats.rx.syncp);
486 trace_xdp_exception(aq_nic->ndev, prog, act);
487 bpf_warn_invalid_xdp_action(aq_nic->ndev, prog, act);
490 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
491 ++rx_ring->stats.rx.xdp_drop;
492 u64_stats_update_end(&rx_ring->stats.rx.syncp);
496 return ERR_PTR(-result);
499 static bool aq_add_rx_fragment(struct device *dev,
500 struct aq_ring_s *ring,
501 struct aq_ring_buff_s *buff,
502 struct xdp_buff *xdp)
504 struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
505 struct aq_ring_buff_s *buff_ = buff;
507 memset(sinfo, 0, sizeof(*sinfo));
511 if (unlikely(sinfo->nr_frags >= MAX_SKB_FRAGS))
514 frag = &sinfo->frags[sinfo->nr_frags++];
515 buff_ = &ring->buff_ring[buff_->next];
516 dma_sync_single_range_for_cpu(dev,
518 buff_->rxdata.pg_off,
521 skb_frag_off_set(frag, buff_->rxdata.pg_off);
522 skb_frag_size_set(frag, buff_->len);
523 sinfo->xdp_frags_size += buff_->len;
524 __skb_frag_set_page(frag, buff_->rxdata.page);
526 buff_->is_cleaned = 1;
528 buff->is_ip_cso &= buff_->is_ip_cso;
529 buff->is_udp_cso &= buff_->is_udp_cso;
530 buff->is_tcp_cso &= buff_->is_tcp_cso;
531 buff->is_cso_err |= buff_->is_cso_err;
533 if (page_is_pfmemalloc(buff_->rxdata.page))
534 xdp_buff_set_frag_pfmemalloc(xdp);
536 } while (!buff_->is_eop);
538 xdp_buff_set_frags_flag(xdp);
543 static int __aq_ring_rx_clean(struct aq_ring_s *self, struct napi_struct *napi,
544 int *work_done, int budget)
546 struct net_device *ndev = aq_nic_get_ndev(self->aq_nic);
549 for (; (self->sw_head != self->hw_head) && budget;
550 self->sw_head = aq_ring_next_dx(self, self->sw_head),
551 --budget, ++(*work_done)) {
552 struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
553 bool is_ptp_ring = aq_ptp_ring(self->aq_nic, self);
554 struct aq_ring_buff_s *buff_ = NULL;
555 struct sk_buff *skb = NULL;
556 unsigned int next_ = 0U;
560 if (buff->is_cleaned)
564 unsigned int frag_cnt = 0U;
567 bool is_rsc_completed = true;
569 if (buff_->next >= self->size) {
576 buff_ = &self->buff_ring[next_];
578 aq_ring_dx_in_range(self->sw_head,
582 if (unlikely(!is_rsc_completed) ||
583 frag_cnt > MAX_SKB_FRAGS) {
588 buff->is_error |= buff_->is_error;
589 buff->is_cso_err |= buff_->is_cso_err;
591 } while (!buff_->is_eop);
593 if (buff->is_error ||
594 (buff->is_lro && buff->is_cso_err)) {
597 if (buff_->next >= self->size) {
602 buff_ = &self->buff_ring[next_];
604 buff_->is_cleaned = true;
605 } while (!buff_->is_eop);
607 u64_stats_update_begin(&self->stats.rx.syncp);
608 ++self->stats.rx.errors;
609 u64_stats_update_end(&self->stats.rx.syncp);
614 if (buff->is_error) {
615 u64_stats_update_begin(&self->stats.rx.syncp);
616 ++self->stats.rx.errors;
617 u64_stats_update_end(&self->stats.rx.syncp);
621 dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),
624 buff->len, DMA_FROM_DEVICE);
626 skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE);
627 if (unlikely(!skb)) {
628 u64_stats_update_begin(&self->stats.rx.syncp);
629 self->stats.rx.skb_alloc_fails++;
630 u64_stats_update_end(&self->stats.rx.syncp);
636 aq_ptp_extract_ts(self->aq_nic, skb,
637 aq_buf_vaddr(&buff->rxdata),
641 if (hdr_len > AQ_CFG_RX_HDR_SIZE)
642 hdr_len = eth_get_headlen(skb->dev,
643 aq_buf_vaddr(&buff->rxdata),
646 memcpy(__skb_put(skb, hdr_len), aq_buf_vaddr(&buff->rxdata),
647 ALIGN(hdr_len, sizeof(long)));
649 if (buff->len - hdr_len > 0) {
650 skb_add_rx_frag(skb, i++, buff->rxdata.page,
651 buff->rxdata.pg_off + hdr_len,
654 page_ref_inc(buff->rxdata.page);
661 buff_ = &self->buff_ring[next_];
663 dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),
665 buff_->rxdata.pg_off,
668 skb_add_rx_frag(skb, i++,
670 buff_->rxdata.pg_off,
673 page_ref_inc(buff_->rxdata.page);
674 buff_->is_cleaned = 1;
676 buff->is_ip_cso &= buff_->is_ip_cso;
677 buff->is_udp_cso &= buff_->is_udp_cso;
678 buff->is_tcp_cso &= buff_->is_tcp_cso;
679 buff->is_cso_err |= buff_->is_cso_err;
681 } while (!buff_->is_eop);
685 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
688 skb->protocol = eth_type_trans(skb, ndev);
690 aq_rx_checksum(self, buff, skb);
692 skb_set_hash(skb, buff->rss_hash,
693 buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :
695 /* Send all PTP traffic to 0 queue */
696 skb_record_rx_queue(skb,
698 : AQ_NIC_RING2QMAP(self->aq_nic,
701 u64_stats_update_begin(&self->stats.rx.syncp);
702 ++self->stats.rx.packets;
703 self->stats.rx.bytes += skb->len;
704 u64_stats_update_end(&self->stats.rx.syncp);
706 napi_gro_receive(napi, skb);
713 static int __aq_ring_xdp_clean(struct aq_ring_s *rx_ring,
714 struct napi_struct *napi, int *work_done,
717 int frame_sz = rx_ring->page_offset + rx_ring->frame_max +
719 struct aq_nic_s *aq_nic = rx_ring->aq_nic;
720 bool is_rsc_completed = true;
724 dev = aq_nic_get_dev(aq_nic);
725 for (; (rx_ring->sw_head != rx_ring->hw_head) && budget;
726 rx_ring->sw_head = aq_ring_next_dx(rx_ring, rx_ring->sw_head),
727 --budget, ++(*work_done)) {
728 struct aq_ring_buff_s *buff = &rx_ring->buff_ring[rx_ring->sw_head];
729 bool is_ptp_ring = aq_ptp_ring(rx_ring->aq_nic, rx_ring);
730 struct aq_ring_buff_s *buff_ = NULL;
731 struct sk_buff *skb = NULL;
732 unsigned int next_ = 0U;
736 if (buff->is_cleaned)
742 if (buff_->next >= rx_ring->size) {
747 buff_ = &rx_ring->buff_ring[next_];
749 aq_ring_dx_in_range(rx_ring->sw_head,
753 if (unlikely(!is_rsc_completed))
756 buff->is_error |= buff_->is_error;
757 buff->is_cso_err |= buff_->is_cso_err;
758 } while (!buff_->is_eop);
760 if (!is_rsc_completed) {
764 if (buff->is_error ||
765 (buff->is_lro && buff->is_cso_err)) {
768 if (buff_->next >= rx_ring->size) {
773 buff_ = &rx_ring->buff_ring[next_];
775 buff_->is_cleaned = true;
776 } while (!buff_->is_eop);
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);
785 if (buff->is_error) {
786 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
787 ++rx_ring->stats.rx.errors;
788 u64_stats_update_end(&rx_ring->stats.rx.syncp);
792 dma_sync_single_range_for_cpu(dev,
795 buff->len, DMA_FROM_DEVICE);
796 hard_start = page_address(buff->rxdata.page) +
797 buff->rxdata.pg_off - rx_ring->page_offset;
801 aq_ptp_extract_ts(rx_ring->aq_nic, skb,
802 aq_buf_vaddr(&buff->rxdata),
805 xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
806 xdp_prepare_buff(&xdp, hard_start, rx_ring->page_offset,
809 if (aq_add_rx_fragment(dev, rx_ring, buff, &xdp)) {
810 u64_stats_update_begin(&rx_ring->stats.rx.syncp);
811 ++rx_ring->stats.rx.packets;
812 rx_ring->stats.rx.bytes += xdp_get_buff_len(&xdp);
813 ++rx_ring->stats.rx.xdp_aborted;
814 u64_stats_update_end(&rx_ring->stats.rx.syncp);
819 skb = aq_xdp_run_prog(aq_nic, &xdp, rx_ring, buff);
820 if (IS_ERR(skb) || !skb)
824 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
827 aq_rx_checksum(rx_ring, buff, skb);
829 skb_set_hash(skb, buff->rss_hash,
830 buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :
832 /* Send all PTP traffic to 0 queue */
833 skb_record_rx_queue(skb,
835 : AQ_NIC_RING2QMAP(rx_ring->aq_nic,
838 napi_gro_receive(napi, skb);
845 int aq_ring_rx_clean(struct aq_ring_s *self,
846 struct napi_struct *napi,
850 if (static_branch_unlikely(&aq_xdp_locking_key))
851 return __aq_ring_xdp_clean(self, napi, work_done, budget);
853 return __aq_ring_rx_clean(self, napi, work_done, budget);
856 void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic)
858 #if IS_REACHABLE(CONFIG_PTP_1588_CLOCK)
859 while (self->sw_head != self->hw_head) {
862 aq_nic->aq_hw_ops->extract_hwts(aq_nic->aq_hw,
864 (self->sw_head * self->dx_size),
866 aq_ptp_tx_hwtstamp(aq_nic, ns);
868 self->sw_head = aq_ring_next_dx(self, self->sw_head);
873 int aq_ring_rx_fill(struct aq_ring_s *self)
875 struct aq_ring_buff_s *buff = NULL;
879 if (aq_ring_avail_dx(self) < min_t(unsigned int, AQ_CFG_RX_REFILL_THRES,
883 for (i = aq_ring_avail_dx(self); i--;
884 self->sw_tail = aq_ring_next_dx(self, self->sw_tail)) {
885 buff = &self->buff_ring[self->sw_tail];
888 buff->len = self->frame_max;
890 err = aq_get_rxpages(self, buff);
894 buff->pa = aq_buf_daddr(&buff->rxdata);
902 void aq_ring_rx_deinit(struct aq_ring_s *self)
907 for (; self->sw_head != self->sw_tail;
908 self->sw_head = aq_ring_next_dx(self, self->sw_head)) {
909 struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
911 aq_free_rxpage(&buff->rxdata, aq_nic_get_dev(self->aq_nic));
915 void aq_ring_free(struct aq_ring_s *self)
920 kfree(self->buff_ring);
923 dma_free_coherent(aq_nic_get_dev(self->aq_nic),
924 self->size * self->dx_size, self->dx_ring,
928 unsigned int aq_ring_fill_stats_data(struct aq_ring_s *self, u64 *data)
933 if (self->ring_type == ATL_RING_RX) {
934 /* This data should mimic aq_ethtool_queue_rx_stat_names structure */
937 start = u64_stats_fetch_begin_irq(&self->stats.rx.syncp);
938 data[count] = self->stats.rx.packets;
939 data[++count] = self->stats.rx.jumbo_packets;
940 data[++count] = self->stats.rx.lro_packets;
941 data[++count] = self->stats.rx.errors;
942 data[++count] = self->stats.rx.alloc_fails;
943 data[++count] = self->stats.rx.skb_alloc_fails;
944 data[++count] = self->stats.rx.polls;
945 data[++count] = self->stats.rx.pg_flips;
946 data[++count] = self->stats.rx.pg_reuses;
947 data[++count] = self->stats.rx.pg_losts;
948 data[++count] = self->stats.rx.xdp_aborted;
949 data[++count] = self->stats.rx.xdp_drop;
950 data[++count] = self->stats.rx.xdp_pass;
951 data[++count] = self->stats.rx.xdp_tx;
952 data[++count] = self->stats.rx.xdp_invalid;
953 data[++count] = self->stats.rx.xdp_redirect;
954 } while (u64_stats_fetch_retry_irq(&self->stats.rx.syncp, start));
956 /* This data should mimic aq_ethtool_queue_tx_stat_names structure */
959 start = u64_stats_fetch_begin_irq(&self->stats.tx.syncp);
960 data[count] = self->stats.tx.packets;
961 data[++count] = self->stats.tx.queue_restarts;
962 } while (u64_stats_fetch_retry_irq(&self->stats.tx.syncp, start));