974 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/* Atlantic Network Driver3 *4 * Copyright (C) 2014-2019 aQuantia Corporation5 * 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 and106 * should release this page and realloc107 */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 206int207aq_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 else240 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 buff_ = buff;551 do {552 bool is_rsc_completed = true;553 554 if (buff_->next >= self->size) {555 err = -EIO;556 goto err_exit;557 }558 559 frag_cnt++;560 next_ = buff_->next;561 buff_ = &self->buff_ring[next_];562 is_rsc_completed =563 aq_ring_dx_in_range(self->sw_head,564 next_,565 self->hw_head);566 567 if (unlikely(!is_rsc_completed) ||568 frag_cnt > MAX_SKB_FRAGS) {569 err = 0;570 goto err_exit;571 }572 573 buff->is_error |= buff_->is_error;574 buff->is_cso_err |= buff_->is_cso_err;575 576 } while (!buff_->is_eop);577 578 if (buff->is_error ||579 (buff->is_lro && buff->is_cso_err)) {580 buff_ = buff;581 do {582 if (buff_->next >= self->size) {583 err = -EIO;584 goto err_exit;585 }586 next_ = buff_->next;587 buff_ = &self->buff_ring[next_];588 589 buff_->is_cleaned = true;590 } while (!buff_->is_eop);591 592 u64_stats_update_begin(&self->stats.rx.syncp);593 ++self->stats.rx.errors;594 u64_stats_update_end(&self->stats.rx.syncp);595 continue;596 }597 }598 599 if (buff->is_error) {600 u64_stats_update_begin(&self->stats.rx.syncp);601 ++self->stats.rx.errors;602 u64_stats_update_end(&self->stats.rx.syncp);603 continue;604 }605 606 dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),607 buff->rxdata.daddr,608 buff->rxdata.pg_off,609 buff->len, DMA_FROM_DEVICE);610 611 skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE);612 if (unlikely(!skb)) {613 u64_stats_update_begin(&self->stats.rx.syncp);614 self->stats.rx.skb_alloc_fails++;615 u64_stats_update_end(&self->stats.rx.syncp);616 err = -ENOMEM;617 goto err_exit;618 }619 if (is_ptp_ring)620 buff->len -=621 aq_ptp_extract_ts(self->aq_nic, skb_hwtstamps(skb),622 aq_buf_vaddr(&buff->rxdata),623 buff->len);624 625 hdr_len = buff->len;626 if (hdr_len > AQ_CFG_RX_HDR_SIZE)627 hdr_len = eth_get_headlen(skb->dev,628 aq_buf_vaddr(&buff->rxdata),629 AQ_CFG_RX_HDR_SIZE);630 631 memcpy(__skb_put(skb, hdr_len), aq_buf_vaddr(&buff->rxdata),632 ALIGN(hdr_len, sizeof(long)));633 634 if (buff->len - hdr_len > 0) {635 skb_add_rx_frag(skb, i++, buff->rxdata.page,636 buff->rxdata.pg_off + hdr_len,637 buff->len - hdr_len,638 self->frame_max);639 page_ref_inc(buff->rxdata.page);640 }641 642 if (!buff->is_eop) {643 buff_ = buff;644 do {645 next_ = buff_->next;646 buff_ = &self->buff_ring[next_];647 648 dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),649 buff_->rxdata.daddr,650 buff_->rxdata.pg_off,651 buff_->len,652 DMA_FROM_DEVICE);653 skb_add_rx_frag(skb, i++,654 buff_->rxdata.page,655 buff_->rxdata.pg_off,656 buff_->len,657 self->frame_max);658 page_ref_inc(buff_->rxdata.page);659 buff_->is_cleaned = 1;660 661 buff->is_ip_cso &= buff_->is_ip_cso;662 buff->is_udp_cso &= buff_->is_udp_cso;663 buff->is_tcp_cso &= buff_->is_tcp_cso;664 buff->is_cso_err |= buff_->is_cso_err;665 666 } while (!buff_->is_eop);667 }668 669 if (buff->is_vlan)670 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),671 buff->vlan_rx_tag);672 673 skb->protocol = eth_type_trans(skb, ndev);674 675 aq_rx_checksum(self, buff, skb);676 677 skb_set_hash(skb, buff->rss_hash,678 buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :679 PKT_HASH_TYPE_NONE);680 /* Send all PTP traffic to 0 queue */681 skb_record_rx_queue(skb,682 is_ptp_ring ? 0683 : AQ_NIC_RING2QMAP(self->aq_nic,684 self->idx));685 686 u64_stats_update_begin(&self->stats.rx.syncp);687 ++self->stats.rx.packets;688 self->stats.rx.bytes += skb->len;689 u64_stats_update_end(&self->stats.rx.syncp);690 691 napi_gro_receive(napi, skb);692 }693 694err_exit:695 return err;696}697 698static int __aq_ring_xdp_clean(struct aq_ring_s *rx_ring,699 struct napi_struct *napi, int *work_done,700 int budget)701{702 int frame_sz = rx_ring->page_offset + rx_ring->frame_max +703 rx_ring->tail_size;704 struct aq_nic_s *aq_nic = rx_ring->aq_nic;705 bool is_rsc_completed = true;706 struct device *dev;707 int err = 0;708 709 dev = aq_nic_get_dev(aq_nic);710 for (; (rx_ring->sw_head != rx_ring->hw_head) && budget;711 rx_ring->sw_head = aq_ring_next_dx(rx_ring, rx_ring->sw_head),712 --budget, ++(*work_done)) {713 struct aq_ring_buff_s *buff = &rx_ring->buff_ring[rx_ring->sw_head];714 bool is_ptp_ring = aq_ptp_ring(rx_ring->aq_nic, rx_ring);715 struct aq_ring_buff_s *buff_ = NULL;716 u16 ptp_hwtstamp_len = 0;717 struct skb_shared_hwtstamps shhwtstamps;718 struct sk_buff *skb = NULL;719 unsigned int next_ = 0U;720 struct xdp_buff xdp;721 void *hard_start;722 723 if (buff->is_cleaned)724 continue;725 726 if (!buff->is_eop) {727 buff_ = buff;728 do {729 if (buff_->next >= rx_ring->size) {730 err = -EIO;731 goto err_exit;732 }733 next_ = buff_->next;734 buff_ = &rx_ring->buff_ring[next_];735 is_rsc_completed =736 aq_ring_dx_in_range(rx_ring->sw_head,737 next_,738 rx_ring->hw_head);739 740 if (unlikely(!is_rsc_completed))741 break;742 743 buff->is_error |= buff_->is_error;744 buff->is_cso_err |= buff_->is_cso_err;745 } while (!buff_->is_eop);746 747 if (!is_rsc_completed) {748 err = 0;749 goto err_exit;750 }751 if (buff->is_error ||752 (buff->is_lro && buff->is_cso_err)) {753 buff_ = buff;754 do {755 if (buff_->next >= rx_ring->size) {756 err = -EIO;757 goto err_exit;758 }759 next_ = buff_->next;760 buff_ = &rx_ring->buff_ring[next_];761 762 buff_->is_cleaned = true;763 } while (!buff_->is_eop);764 765 u64_stats_update_begin(&rx_ring->stats.rx.syncp);766 ++rx_ring->stats.rx.errors;767 u64_stats_update_end(&rx_ring->stats.rx.syncp);768 continue;769 }770 }771 772 if (buff->is_error) {773 u64_stats_update_begin(&rx_ring->stats.rx.syncp);774 ++rx_ring->stats.rx.errors;775 u64_stats_update_end(&rx_ring->stats.rx.syncp);776 continue;777 }778 779 dma_sync_single_range_for_cpu(dev,780 buff->rxdata.daddr,781 buff->rxdata.pg_off,782 buff->len, DMA_FROM_DEVICE);783 hard_start = page_address(buff->rxdata.page) +784 buff->rxdata.pg_off - rx_ring->page_offset;785 786 if (is_ptp_ring) {787 ptp_hwtstamp_len = aq_ptp_extract_ts(rx_ring->aq_nic, &shhwtstamps,788 aq_buf_vaddr(&buff->rxdata),789 buff->len);790 buff->len -= ptp_hwtstamp_len;791 }792 793 xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);794 xdp_prepare_buff(&xdp, hard_start, rx_ring->page_offset,795 buff->len, false);796 if (!buff->is_eop) {797 if (aq_add_rx_fragment(dev, rx_ring, buff, &xdp)) {798 u64_stats_update_begin(&rx_ring->stats.rx.syncp);799 ++rx_ring->stats.rx.packets;800 rx_ring->stats.rx.bytes += xdp_get_buff_len(&xdp);801 ++rx_ring->stats.rx.xdp_aborted;802 u64_stats_update_end(&rx_ring->stats.rx.syncp);803 continue;804 }805 }806 807 skb = aq_xdp_run_prog(aq_nic, &xdp, rx_ring, buff);808 if (IS_ERR(skb) || !skb)809 continue;810 811 if (ptp_hwtstamp_len > 0)812 *skb_hwtstamps(skb) = shhwtstamps;813 814 if (buff->is_vlan)815 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),816 buff->vlan_rx_tag);817 818 aq_rx_checksum(rx_ring, buff, skb);819 820 skb_set_hash(skb, buff->rss_hash,821 buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :822 PKT_HASH_TYPE_NONE);823 /* Send all PTP traffic to 0 queue */824 skb_record_rx_queue(skb,825 is_ptp_ring ? 0826 : AQ_NIC_RING2QMAP(rx_ring->aq_nic,827 rx_ring->idx));828 829 napi_gro_receive(napi, skb);830 }831 832err_exit:833 return err;834}835 836int aq_ring_rx_clean(struct aq_ring_s *self,837 struct napi_struct *napi,838 int *work_done,839 int budget)840{841 if (static_branch_unlikely(&aq_xdp_locking_key))842 return __aq_ring_xdp_clean(self, napi, work_done, budget);843 else844 return __aq_ring_rx_clean(self, napi, work_done, budget);845}846 847void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic)848{849#if IS_REACHABLE(CONFIG_PTP_1588_CLOCK)850 while (self->sw_head != self->hw_head) {851 u64 ns;852 853 aq_nic->aq_hw_ops->extract_hwts(aq_nic->aq_hw,854 self->dx_ring +855 (self->sw_head * self->dx_size),856 self->dx_size, &ns);857 aq_ptp_tx_hwtstamp(aq_nic, ns);858 859 self->sw_head = aq_ring_next_dx(self, self->sw_head);860 }861#endif862}863 864int aq_ring_rx_fill(struct aq_ring_s *self)865{866 struct aq_ring_buff_s *buff = NULL;867 int err = 0;868 int i = 0;869 870 if (aq_ring_avail_dx(self) < min_t(unsigned int, AQ_CFG_RX_REFILL_THRES,871 self->size / 2))872 return err;873 874 for (i = aq_ring_avail_dx(self); i--;875 self->sw_tail = aq_ring_next_dx(self, self->sw_tail)) {876 buff = &self->buff_ring[self->sw_tail];877 878 buff->flags = 0U;879 buff->len = self->frame_max;880 881 err = aq_get_rxpages(self, buff);882 if (err)883 goto err_exit;884 885 buff->pa = aq_buf_daddr(&buff->rxdata);886 buff = NULL;887 }888 889err_exit:890 return err;891}892 893void aq_ring_rx_deinit(struct aq_ring_s *self)894{895 if (!self)896 return;897 898 for (; self->sw_head != self->sw_tail;899 self->sw_head = aq_ring_next_dx(self, self->sw_head)) {900 struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];901 902 aq_free_rxpage(&buff->rxdata, aq_nic_get_dev(self->aq_nic));903 }904}905 906void aq_ring_free(struct aq_ring_s *self)907{908 if (!self)909 return;910 911 kfree(self->buff_ring);912 self->buff_ring = NULL;913 914 if (self->dx_ring) {915 dma_free_coherent(aq_nic_get_dev(self->aq_nic),916 self->size * self->dx_size, self->dx_ring,917 self->dx_ring_pa);918 self->dx_ring = NULL;919 }920}921 922void aq_ring_hwts_rx_free(struct aq_ring_s *self)923{924 if (!self)925 return;926 927 if (self->dx_ring) {928 dma_free_coherent(aq_nic_get_dev(self->aq_nic),929 self->size * self->dx_size + AQ_CFG_RXDS_DEF,930 self->dx_ring, self->dx_ring_pa);931 self->dx_ring = NULL;932 }933}934 935unsigned int aq_ring_fill_stats_data(struct aq_ring_s *self, u64 *data)936{937 unsigned int count;938 unsigned int start;939 940 if (self->ring_type == ATL_RING_RX) {941 /* This data should mimic aq_ethtool_queue_rx_stat_names structure */942 do {943 count = 0;944 start = u64_stats_fetch_begin(&self->stats.rx.syncp);945 data[count] = self->stats.rx.packets;946 data[++count] = self->stats.rx.jumbo_packets;947 data[++count] = self->stats.rx.lro_packets;948 data[++count] = self->stats.rx.errors;949 data[++count] = self->stats.rx.alloc_fails;950 data[++count] = self->stats.rx.skb_alloc_fails;951 data[++count] = self->stats.rx.polls;952 data[++count] = self->stats.rx.pg_flips;953 data[++count] = self->stats.rx.pg_reuses;954 data[++count] = self->stats.rx.pg_losts;955 data[++count] = self->stats.rx.xdp_aborted;956 data[++count] = self->stats.rx.xdp_drop;957 data[++count] = self->stats.rx.xdp_pass;958 data[++count] = self->stats.rx.xdp_tx;959 data[++count] = self->stats.rx.xdp_invalid;960 data[++count] = self->stats.rx.xdp_redirect;961 } while (u64_stats_fetch_retry(&self->stats.rx.syncp, start));962 } else {963 /* This data should mimic aq_ethtool_queue_tx_stat_names structure */964 do {965 count = 0;966 start = u64_stats_fetch_begin(&self->stats.tx.syncp);967 data[count] = self->stats.tx.packets;968 data[++count] = self->stats.tx.queue_restarts;969 } while (u64_stats_fetch_retry(&self->stats.tx.syncp, start));970 }971 972 return ++count;973}974