diff options
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/aq_ring.c')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/aq_ring.c | 989 |
1 files changed, 989 insertions, 0 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c new file mode 100644 index 000000000..4d9d7d1ed --- /dev/null +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c @@ -0,0 +1,989 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Atlantic Network Driver + * + * Copyright (C) 2014-2019 aQuantia Corporation + * Copyright (C) 2019-2020 Marvell International Ltd. + */ + +/* File aq_ring.c: Definition of functions for Rx/Tx rings. */ + +#include "aq_nic.h" +#include "aq_hw.h" +#include "aq_hw_utils.h" +#include "aq_ptp.h" +#include "aq_vec.h" +#include "aq_main.h" + +#include <net/xdp.h> +#include <linux/filter.h> +#include <linux/bpf_trace.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> + +static void aq_get_rxpages_xdp(struct aq_ring_buff_s *buff, + struct xdp_buff *xdp) +{ + struct skb_shared_info *sinfo; + int i; + + if (xdp_buff_has_frags(xdp)) { + sinfo = xdp_get_shared_info_from_buff(xdp); + + for (i = 0; i < sinfo->nr_frags; i++) { + skb_frag_t *frag = &sinfo->frags[i]; + + page_ref_inc(skb_frag_page(frag)); + } + } + page_ref_inc(buff->rxdata.page); +} + +static inline void aq_free_rxpage(struct aq_rxpage *rxpage, struct device *dev) +{ + unsigned int len = PAGE_SIZE << rxpage->order; + + dma_unmap_page(dev, rxpage->daddr, len, DMA_FROM_DEVICE); + + /* Drop the ref for being in the ring. */ + __free_pages(rxpage->page, rxpage->order); + rxpage->page = NULL; +} + +static int aq_alloc_rxpages(struct aq_rxpage *rxpage, struct aq_ring_s *rx_ring) +{ + struct device *dev = aq_nic_get_dev(rx_ring->aq_nic); + unsigned int order = rx_ring->page_order; + struct page *page; + int ret = -ENOMEM; + dma_addr_t daddr; + + page = dev_alloc_pages(order); + if (unlikely(!page)) + goto err_exit; + + daddr = dma_map_page(dev, page, 0, PAGE_SIZE << order, + DMA_FROM_DEVICE); + + if (unlikely(dma_mapping_error(dev, daddr))) + goto free_page; + + rxpage->page = page; + rxpage->daddr = daddr; + rxpage->order = order; + rxpage->pg_off = rx_ring->page_offset; + + return 0; + +free_page: + __free_pages(page, order); + +err_exit: + return ret; +} + +static int aq_get_rxpages(struct aq_ring_s *self, struct aq_ring_buff_s *rxbuf) +{ + unsigned int order = self->page_order; + u16 page_offset = self->page_offset; + u16 frame_max = self->frame_max; + u16 tail_size = self->tail_size; + int ret; + + if (rxbuf->rxdata.page) { + /* One means ring is the only user and can reuse */ + if (page_ref_count(rxbuf->rxdata.page) > 1) { + /* Try reuse buffer */ + rxbuf->rxdata.pg_off += frame_max + page_offset + + tail_size; + if (rxbuf->rxdata.pg_off + frame_max + tail_size <= + (PAGE_SIZE << order)) { + u64_stats_update_begin(&self->stats.rx.syncp); + self->stats.rx.pg_flips++; + u64_stats_update_end(&self->stats.rx.syncp); + + } else { + /* Buffer exhausted. We have other users and + * should release this page and realloc + */ + aq_free_rxpage(&rxbuf->rxdata, + aq_nic_get_dev(self->aq_nic)); + u64_stats_update_begin(&self->stats.rx.syncp); + self->stats.rx.pg_losts++; + u64_stats_update_end(&self->stats.rx.syncp); + } + } else { + rxbuf->rxdata.pg_off = page_offset; + u64_stats_update_begin(&self->stats.rx.syncp); + self->stats.rx.pg_reuses++; + u64_stats_update_end(&self->stats.rx.syncp); + } + } + + if (!rxbuf->rxdata.page) { + ret = aq_alloc_rxpages(&rxbuf->rxdata, self); + if (ret) { + u64_stats_update_begin(&self->stats.rx.syncp); + self->stats.rx.alloc_fails++; + u64_stats_update_end(&self->stats.rx.syncp); + } + return ret; + } + + return 0; +} + +static struct aq_ring_s *aq_ring_alloc(struct aq_ring_s *self, + struct aq_nic_s *aq_nic) +{ + int err = 0; + + self->buff_ring = + kcalloc(self->size, sizeof(struct aq_ring_buff_s), GFP_KERNEL); + + if (!self->buff_ring) { + err = -ENOMEM; + goto err_exit; + } + + self->dx_ring = dma_alloc_coherent(aq_nic_get_dev(aq_nic), + self->size * self->dx_size, + &self->dx_ring_pa, GFP_KERNEL); + if (!self->dx_ring) { + err = -ENOMEM; + goto err_exit; + } + +err_exit: + if (err < 0) { + aq_ring_free(self); + self = NULL; + } + + return self; +} + +struct aq_ring_s *aq_ring_tx_alloc(struct aq_ring_s *self, + struct aq_nic_s *aq_nic, + unsigned int idx, + struct aq_nic_cfg_s *aq_nic_cfg) +{ + int err = 0; + + self->aq_nic = aq_nic; + self->idx = idx; + self->size = aq_nic_cfg->txds; + self->dx_size = aq_nic_cfg->aq_hw_caps->txd_size; + + self = aq_ring_alloc(self, aq_nic); + if (!self) { + err = -ENOMEM; + goto err_exit; + } + +err_exit: + if (err < 0) { + aq_ring_free(self); + self = NULL; + } + + return self; +} + +struct aq_ring_s *aq_ring_rx_alloc(struct aq_ring_s *self, + struct aq_nic_s *aq_nic, + unsigned int idx, + struct aq_nic_cfg_s *aq_nic_cfg) +{ + int err = 0; + + self->aq_nic = aq_nic; + self->idx = idx; + self->size = aq_nic_cfg->rxds; + self->dx_size = aq_nic_cfg->aq_hw_caps->rxd_size; + self->xdp_prog = aq_nic->xdp_prog; + self->frame_max = AQ_CFG_RX_FRAME_MAX; + + /* Only order-2 is allowed if XDP is enabled */ + if (READ_ONCE(self->xdp_prog)) { + self->page_offset = AQ_XDP_HEADROOM; + self->page_order = AQ_CFG_XDP_PAGEORDER; + self->tail_size = AQ_XDP_TAILROOM; + } else { + self->page_offset = 0; + self->page_order = fls(self->frame_max / PAGE_SIZE + + (self->frame_max % PAGE_SIZE ? 1 : 0)) - 1; + if (aq_nic_cfg->rxpageorder > self->page_order) + self->page_order = aq_nic_cfg->rxpageorder; + self->tail_size = 0; + } + + self = aq_ring_alloc(self, aq_nic); + if (!self) { + err = -ENOMEM; + goto err_exit; + } + +err_exit: + if (err < 0) { + aq_ring_free(self); + self = NULL; + } + + return self; +} + +struct aq_ring_s * +aq_ring_hwts_rx_alloc(struct aq_ring_s *self, struct aq_nic_s *aq_nic, + unsigned int idx, unsigned int size, unsigned int dx_size) +{ + struct device *dev = aq_nic_get_dev(aq_nic); + size_t sz = size * dx_size + AQ_CFG_RXDS_DEF; + + memset(self, 0, sizeof(*self)); + + self->aq_nic = aq_nic; + self->idx = idx; + self->size = size; + self->dx_size = dx_size; + + self->dx_ring = dma_alloc_coherent(dev, sz, &self->dx_ring_pa, + GFP_KERNEL); + if (!self->dx_ring) { + aq_ring_free(self); + return NULL; + } + + return self; +} + +int aq_ring_init(struct aq_ring_s *self, const enum atl_ring_type ring_type) +{ + self->hw_head = 0; + self->sw_head = 0; + self->sw_tail = 0; + self->ring_type = ring_type; + + if (self->ring_type == ATL_RING_RX) + u64_stats_init(&self->stats.rx.syncp); + else + u64_stats_init(&self->stats.tx.syncp); + + return 0; +} + +static inline bool aq_ring_dx_in_range(unsigned int h, unsigned int i, + unsigned int t) +{ + return (h < t) ? ((h < i) && (i < t)) : ((h < i) || (i < t)); +} + +void aq_ring_update_queue_state(struct aq_ring_s *ring) +{ + if (aq_ring_avail_dx(ring) <= AQ_CFG_SKB_FRAGS_MAX) + aq_ring_queue_stop(ring); + else if (aq_ring_avail_dx(ring) > AQ_CFG_RESTART_DESC_THRES) + aq_ring_queue_wake(ring); +} + +void aq_ring_queue_wake(struct aq_ring_s *ring) +{ + struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic); + + if (__netif_subqueue_stopped(ndev, + AQ_NIC_RING2QMAP(ring->aq_nic, + ring->idx))) { + netif_wake_subqueue(ndev, + AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx)); + u64_stats_update_begin(&ring->stats.tx.syncp); + ring->stats.tx.queue_restarts++; + u64_stats_update_end(&ring->stats.tx.syncp); + } +} + +void aq_ring_queue_stop(struct aq_ring_s *ring) +{ + struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic); + + if (!__netif_subqueue_stopped(ndev, + AQ_NIC_RING2QMAP(ring->aq_nic, + ring->idx))) + netif_stop_subqueue(ndev, + AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx)); +} + +bool aq_ring_tx_clean(struct aq_ring_s *self) +{ + struct device *dev = aq_nic_get_dev(self->aq_nic); + unsigned int budget; + + for (budget = AQ_CFG_TX_CLEAN_BUDGET; + budget && self->sw_head != self->hw_head; budget--) { + struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head]; + + if (likely(buff->is_mapped)) { + if (unlikely(buff->is_sop)) { + if (!buff->is_eop && + buff->eop_index != 0xffffU && + (!aq_ring_dx_in_range(self->sw_head, + buff->eop_index, + self->hw_head))) + break; + + dma_unmap_single(dev, buff->pa, buff->len, + DMA_TO_DEVICE); + } else { + dma_unmap_page(dev, buff->pa, buff->len, + DMA_TO_DEVICE); + } + } + + if (likely(!buff->is_eop)) + goto out; + + if (buff->skb) { + u64_stats_update_begin(&self->stats.tx.syncp); + ++self->stats.tx.packets; + self->stats.tx.bytes += buff->skb->len; + u64_stats_update_end(&self->stats.tx.syncp); + dev_kfree_skb_any(buff->skb); + } else if (buff->xdpf) { + u64_stats_update_begin(&self->stats.tx.syncp); + ++self->stats.tx.packets; + self->stats.tx.bytes += xdp_get_frame_len(buff->xdpf); + u64_stats_update_end(&self->stats.tx.syncp); + xdp_return_frame_rx_napi(buff->xdpf); + } + +out: + buff->skb = NULL; + buff->xdpf = NULL; + buff->pa = 0U; + buff->eop_index = 0xffffU; + self->sw_head = aq_ring_next_dx(self, self->sw_head); + } + + return !!budget; +} + +static void aq_rx_checksum(struct aq_ring_s *self, + struct aq_ring_buff_s *buff, + struct sk_buff *skb) +{ + if (!(self->aq_nic->ndev->features & NETIF_F_RXCSUM)) + return; + + if (unlikely(buff->is_cso_err)) { + u64_stats_update_begin(&self->stats.rx.syncp); + ++self->stats.rx.errors; + u64_stats_update_end(&self->stats.rx.syncp); + skb->ip_summed = CHECKSUM_NONE; + return; + } + if (buff->is_ip_cso) { + __skb_incr_checksum_unnecessary(skb); + } else { + skb->ip_summed = CHECKSUM_NONE; + } + + if (buff->is_udp_cso || buff->is_tcp_cso) + __skb_incr_checksum_unnecessary(skb); +} + +int aq_xdp_xmit(struct net_device *dev, int num_frames, + struct xdp_frame **frames, u32 flags) +{ + struct aq_nic_s *aq_nic = netdev_priv(dev); + unsigned int vec, i, drop = 0; + int cpu = smp_processor_id(); + struct aq_nic_cfg_s *aq_cfg; + struct aq_ring_s *ring; + + aq_cfg = aq_nic_get_cfg(aq_nic); + vec = cpu % aq_cfg->vecs; + ring = aq_nic->aq_ring_tx[AQ_NIC_CFG_TCVEC2RING(aq_cfg, 0, vec)]; + + for (i = 0; i < num_frames; i++) { + struct xdp_frame *xdpf = frames[i]; + + if (aq_nic_xmit_xdpf(aq_nic, ring, xdpf) == NETDEV_TX_BUSY) + drop++; + } + + return num_frames - drop; +} + +static struct sk_buff *aq_xdp_build_skb(struct xdp_buff *xdp, + struct net_device *dev, + struct aq_ring_buff_s *buff) +{ + struct xdp_frame *xdpf; + struct sk_buff *skb; + + xdpf = xdp_convert_buff_to_frame(xdp); + if (unlikely(!xdpf)) + return NULL; + + skb = xdp_build_skb_from_frame(xdpf, dev); + if (!skb) + return NULL; + + aq_get_rxpages_xdp(buff, xdp); + return skb; +} + +static struct sk_buff *aq_xdp_run_prog(struct aq_nic_s *aq_nic, + struct xdp_buff *xdp, + struct aq_ring_s *rx_ring, + struct aq_ring_buff_s *buff) +{ + int result = NETDEV_TX_BUSY; + struct aq_ring_s *tx_ring; + struct xdp_frame *xdpf; + struct bpf_prog *prog; + u32 act = XDP_ABORTED; + struct sk_buff *skb; + + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.packets; + rx_ring->stats.rx.bytes += xdp_get_buff_len(xdp); + u64_stats_update_end(&rx_ring->stats.rx.syncp); + + prog = READ_ONCE(rx_ring->xdp_prog); + if (!prog) + return aq_xdp_build_skb(xdp, aq_nic->ndev, buff); + + prefetchw(xdp->data_hard_start); /* xdp_frame write */ + + /* single buffer XDP program, but packet is multi buffer, aborted */ + if (xdp_buff_has_frags(xdp) && !prog->aux->xdp_has_frags) + goto out_aborted; + + act = bpf_prog_run_xdp(prog, xdp); + switch (act) { + case XDP_PASS: + skb = aq_xdp_build_skb(xdp, aq_nic->ndev, buff); + if (!skb) + goto out_aborted; + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_pass; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + return skb; + case XDP_TX: + xdpf = xdp_convert_buff_to_frame(xdp); + if (unlikely(!xdpf)) + goto out_aborted; + tx_ring = aq_nic->aq_ring_tx[rx_ring->idx]; + result = aq_nic_xmit_xdpf(aq_nic, tx_ring, xdpf); + if (result == NETDEV_TX_BUSY) + goto out_aborted; + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_tx; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + aq_get_rxpages_xdp(buff, xdp); + break; + case XDP_REDIRECT: + if (xdp_do_redirect(aq_nic->ndev, xdp, prog) < 0) + goto out_aborted; + xdp_do_flush(); + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_redirect; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + aq_get_rxpages_xdp(buff, xdp); + break; + default: + fallthrough; + case XDP_ABORTED: +out_aborted: + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_aborted; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + trace_xdp_exception(aq_nic->ndev, prog, act); + bpf_warn_invalid_xdp_action(aq_nic->ndev, prog, act); + break; + case XDP_DROP: + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.xdp_drop; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + break; + } + + return ERR_PTR(-result); +} + +static bool aq_add_rx_fragment(struct device *dev, + struct aq_ring_s *ring, + struct aq_ring_buff_s *buff, + struct xdp_buff *xdp) +{ + struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp); + struct aq_ring_buff_s *buff_ = buff; + + memset(sinfo, 0, sizeof(*sinfo)); + do { + skb_frag_t *frag; + + if (unlikely(sinfo->nr_frags >= MAX_SKB_FRAGS)) + return true; + + frag = &sinfo->frags[sinfo->nr_frags++]; + buff_ = &ring->buff_ring[buff_->next]; + dma_sync_single_range_for_cpu(dev, + buff_->rxdata.daddr, + buff_->rxdata.pg_off, + buff_->len, + DMA_FROM_DEVICE); + skb_frag_off_set(frag, buff_->rxdata.pg_off); + skb_frag_size_set(frag, buff_->len); + sinfo->xdp_frags_size += buff_->len; + __skb_frag_set_page(frag, buff_->rxdata.page); + + buff_->is_cleaned = 1; + + buff->is_ip_cso &= buff_->is_ip_cso; + buff->is_udp_cso &= buff_->is_udp_cso; + buff->is_tcp_cso &= buff_->is_tcp_cso; + buff->is_cso_err |= buff_->is_cso_err; + + if (page_is_pfmemalloc(buff_->rxdata.page)) + xdp_buff_set_frag_pfmemalloc(xdp); + + } while (!buff_->is_eop); + + xdp_buff_set_frags_flag(xdp); + + return false; +} + +static int __aq_ring_rx_clean(struct aq_ring_s *self, struct napi_struct *napi, + int *work_done, int budget) +{ + struct net_device *ndev = aq_nic_get_ndev(self->aq_nic); + int err = 0; + + for (; (self->sw_head != self->hw_head) && budget; + self->sw_head = aq_ring_next_dx(self, self->sw_head), + --budget, ++(*work_done)) { + struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head]; + bool is_ptp_ring = aq_ptp_ring(self->aq_nic, self); + struct aq_ring_buff_s *buff_ = NULL; + struct sk_buff *skb = NULL; + unsigned int next_ = 0U; + unsigned int i = 0U; + u16 hdr_len; + + if (buff->is_cleaned) + continue; + + if (!buff->is_eop) { + unsigned int frag_cnt = 0U; + buff_ = buff; + do { + bool is_rsc_completed = true; + + if (buff_->next >= self->size) { + err = -EIO; + goto err_exit; + } + + frag_cnt++; + next_ = buff_->next, + buff_ = &self->buff_ring[next_]; + is_rsc_completed = + aq_ring_dx_in_range(self->sw_head, + next_, + self->hw_head); + + if (unlikely(!is_rsc_completed) || + frag_cnt > MAX_SKB_FRAGS) { + err = 0; + goto err_exit; + } + + buff->is_error |= buff_->is_error; + buff->is_cso_err |= buff_->is_cso_err; + + } while (!buff_->is_eop); + + if (buff->is_error || + (buff->is_lro && buff->is_cso_err)) { + buff_ = buff; + do { + if (buff_->next >= self->size) { + err = -EIO; + goto err_exit; + } + next_ = buff_->next, + buff_ = &self->buff_ring[next_]; + + buff_->is_cleaned = true; + } while (!buff_->is_eop); + + u64_stats_update_begin(&self->stats.rx.syncp); + ++self->stats.rx.errors; + u64_stats_update_end(&self->stats.rx.syncp); + continue; + } + } + + if (buff->is_error) { + u64_stats_update_begin(&self->stats.rx.syncp); + ++self->stats.rx.errors; + u64_stats_update_end(&self->stats.rx.syncp); + continue; + } + + dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic), + buff->rxdata.daddr, + buff->rxdata.pg_off, + buff->len, DMA_FROM_DEVICE); + + skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE); + if (unlikely(!skb)) { + u64_stats_update_begin(&self->stats.rx.syncp); + self->stats.rx.skb_alloc_fails++; + u64_stats_update_end(&self->stats.rx.syncp); + err = -ENOMEM; + goto err_exit; + } + if (is_ptp_ring) + buff->len -= + aq_ptp_extract_ts(self->aq_nic, skb_hwtstamps(skb), + aq_buf_vaddr(&buff->rxdata), + buff->len); + + hdr_len = buff->len; + if (hdr_len > AQ_CFG_RX_HDR_SIZE) + hdr_len = eth_get_headlen(skb->dev, + aq_buf_vaddr(&buff->rxdata), + AQ_CFG_RX_HDR_SIZE); + + memcpy(__skb_put(skb, hdr_len), aq_buf_vaddr(&buff->rxdata), + ALIGN(hdr_len, sizeof(long))); + + if (buff->len - hdr_len > 0) { + skb_add_rx_frag(skb, i++, buff->rxdata.page, + buff->rxdata.pg_off + hdr_len, + buff->len - hdr_len, + self->frame_max); + page_ref_inc(buff->rxdata.page); + } + + if (!buff->is_eop) { + buff_ = buff; + do { + next_ = buff_->next; + buff_ = &self->buff_ring[next_]; + + dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic), + buff_->rxdata.daddr, + buff_->rxdata.pg_off, + buff_->len, + DMA_FROM_DEVICE); + skb_add_rx_frag(skb, i++, + buff_->rxdata.page, + buff_->rxdata.pg_off, + buff_->len, + self->frame_max); + page_ref_inc(buff_->rxdata.page); + buff_->is_cleaned = 1; + + buff->is_ip_cso &= buff_->is_ip_cso; + buff->is_udp_cso &= buff_->is_udp_cso; + buff->is_tcp_cso &= buff_->is_tcp_cso; + buff->is_cso_err |= buff_->is_cso_err; + + } while (!buff_->is_eop); + } + + if (buff->is_vlan) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + buff->vlan_rx_tag); + + skb->protocol = eth_type_trans(skb, ndev); + + aq_rx_checksum(self, buff, skb); + + skb_set_hash(skb, buff->rss_hash, + buff->is_hash_l4 ? PKT_HASH_TYPE_L4 : + PKT_HASH_TYPE_NONE); + /* Send all PTP traffic to 0 queue */ + skb_record_rx_queue(skb, + is_ptp_ring ? 0 + : AQ_NIC_RING2QMAP(self->aq_nic, + self->idx)); + + u64_stats_update_begin(&self->stats.rx.syncp); + ++self->stats.rx.packets; + self->stats.rx.bytes += skb->len; + u64_stats_update_end(&self->stats.rx.syncp); + + napi_gro_receive(napi, skb); + } + +err_exit: + return err; +} + +static int __aq_ring_xdp_clean(struct aq_ring_s *rx_ring, + struct napi_struct *napi, int *work_done, + int budget) +{ + int frame_sz = rx_ring->page_offset + rx_ring->frame_max + + rx_ring->tail_size; + struct aq_nic_s *aq_nic = rx_ring->aq_nic; + bool is_rsc_completed = true; + struct device *dev; + int err = 0; + + dev = aq_nic_get_dev(aq_nic); + for (; (rx_ring->sw_head != rx_ring->hw_head) && budget; + rx_ring->sw_head = aq_ring_next_dx(rx_ring, rx_ring->sw_head), + --budget, ++(*work_done)) { + struct aq_ring_buff_s *buff = &rx_ring->buff_ring[rx_ring->sw_head]; + bool is_ptp_ring = aq_ptp_ring(rx_ring->aq_nic, rx_ring); + struct aq_ring_buff_s *buff_ = NULL; + u16 ptp_hwtstamp_len = 0; + struct skb_shared_hwtstamps shhwtstamps; + struct sk_buff *skb = NULL; + unsigned int next_ = 0U; + struct xdp_buff xdp; + void *hard_start; + + if (buff->is_cleaned) + continue; + + if (!buff->is_eop) { + buff_ = buff; + do { + if (buff_->next >= rx_ring->size) { + err = -EIO; + goto err_exit; + } + next_ = buff_->next; + buff_ = &rx_ring->buff_ring[next_]; + is_rsc_completed = + aq_ring_dx_in_range(rx_ring->sw_head, + next_, + rx_ring->hw_head); + + if (unlikely(!is_rsc_completed)) + break; + + buff->is_error |= buff_->is_error; + buff->is_cso_err |= buff_->is_cso_err; + } while (!buff_->is_eop); + + if (!is_rsc_completed) { + err = 0; + goto err_exit; + } + if (buff->is_error || + (buff->is_lro && buff->is_cso_err)) { + buff_ = buff; + do { + if (buff_->next >= rx_ring->size) { + err = -EIO; + goto err_exit; + } + next_ = buff_->next; + buff_ = &rx_ring->buff_ring[next_]; + + buff_->is_cleaned = true; + } while (!buff_->is_eop); + + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.errors; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + continue; + } + } + + if (buff->is_error) { + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.errors; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + continue; + } + + dma_sync_single_range_for_cpu(dev, + buff->rxdata.daddr, + buff->rxdata.pg_off, + buff->len, DMA_FROM_DEVICE); + hard_start = page_address(buff->rxdata.page) + + buff->rxdata.pg_off - rx_ring->page_offset; + + if (is_ptp_ring) { + ptp_hwtstamp_len = aq_ptp_extract_ts(rx_ring->aq_nic, &shhwtstamps, + aq_buf_vaddr(&buff->rxdata), + buff->len); + buff->len -= ptp_hwtstamp_len; + } + + xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq); + xdp_prepare_buff(&xdp, hard_start, rx_ring->page_offset, + buff->len, false); + if (!buff->is_eop) { + if (aq_add_rx_fragment(dev, rx_ring, buff, &xdp)) { + u64_stats_update_begin(&rx_ring->stats.rx.syncp); + ++rx_ring->stats.rx.packets; + rx_ring->stats.rx.bytes += xdp_get_buff_len(&xdp); + ++rx_ring->stats.rx.xdp_aborted; + u64_stats_update_end(&rx_ring->stats.rx.syncp); + continue; + } + } + + skb = aq_xdp_run_prog(aq_nic, &xdp, rx_ring, buff); + if (IS_ERR(skb) || !skb) + continue; + + if (ptp_hwtstamp_len > 0) + *skb_hwtstamps(skb) = shhwtstamps; + + if (buff->is_vlan) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + buff->vlan_rx_tag); + + aq_rx_checksum(rx_ring, buff, skb); + + skb_set_hash(skb, buff->rss_hash, + buff->is_hash_l4 ? PKT_HASH_TYPE_L4 : + PKT_HASH_TYPE_NONE); + /* Send all PTP traffic to 0 queue */ + skb_record_rx_queue(skb, + is_ptp_ring ? 0 + : AQ_NIC_RING2QMAP(rx_ring->aq_nic, + rx_ring->idx)); + + napi_gro_receive(napi, skb); + } + +err_exit: + return err; +} + +int aq_ring_rx_clean(struct aq_ring_s *self, + struct napi_struct *napi, + int *work_done, + int budget) +{ + if (static_branch_unlikely(&aq_xdp_locking_key)) + return __aq_ring_xdp_clean(self, napi, work_done, budget); + else + return __aq_ring_rx_clean(self, napi, work_done, budget); +} + +void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic) +{ +#if IS_REACHABLE(CONFIG_PTP_1588_CLOCK) + while (self->sw_head != self->hw_head) { + u64 ns; + + aq_nic->aq_hw_ops->extract_hwts(aq_nic->aq_hw, + self->dx_ring + + (self->sw_head * self->dx_size), + self->dx_size, &ns); + aq_ptp_tx_hwtstamp(aq_nic, ns); + + self->sw_head = aq_ring_next_dx(self, self->sw_head); + } +#endif +} + +int aq_ring_rx_fill(struct aq_ring_s *self) +{ + struct aq_ring_buff_s *buff = NULL; + int err = 0; + int i = 0; + + if (aq_ring_avail_dx(self) < min_t(unsigned int, AQ_CFG_RX_REFILL_THRES, + self->size / 2)) + return err; + + for (i = aq_ring_avail_dx(self); i--; + self->sw_tail = aq_ring_next_dx(self, self->sw_tail)) { + buff = &self->buff_ring[self->sw_tail]; + + buff->flags = 0U; + buff->len = self->frame_max; + + err = aq_get_rxpages(self, buff); + if (err) + goto err_exit; + + buff->pa = aq_buf_daddr(&buff->rxdata); + buff = NULL; + } + +err_exit: + return err; +} + +void aq_ring_rx_deinit(struct aq_ring_s *self) +{ + if (!self) + return; + + for (; self->sw_head != self->sw_tail; + self->sw_head = aq_ring_next_dx(self, self->sw_head)) { + struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head]; + + aq_free_rxpage(&buff->rxdata, aq_nic_get_dev(self->aq_nic)); + } +} + +void aq_ring_free(struct aq_ring_s *self) +{ + if (!self) + return; + + kfree(self->buff_ring); + self->buff_ring = NULL; + + if (self->dx_ring) { + dma_free_coherent(aq_nic_get_dev(self->aq_nic), + self->size * self->dx_size, self->dx_ring, + self->dx_ring_pa); + self->dx_ring = NULL; + } +} + +unsigned int aq_ring_fill_stats_data(struct aq_ring_s *self, u64 *data) +{ + unsigned int count; + unsigned int start; + + if (self->ring_type == ATL_RING_RX) { + /* This data should mimic aq_ethtool_queue_rx_stat_names structure */ + do { + count = 0; + start = u64_stats_fetch_begin_irq(&self->stats.rx.syncp); + data[count] = self->stats.rx.packets; + data[++count] = self->stats.rx.jumbo_packets; + data[++count] = self->stats.rx.lro_packets; + data[++count] = self->stats.rx.errors; + data[++count] = self->stats.rx.alloc_fails; + data[++count] = self->stats.rx.skb_alloc_fails; + data[++count] = self->stats.rx.polls; + data[++count] = self->stats.rx.pg_flips; + data[++count] = self->stats.rx.pg_reuses; + data[++count] = self->stats.rx.pg_losts; + data[++count] = self->stats.rx.xdp_aborted; + data[++count] = self->stats.rx.xdp_drop; + data[++count] = self->stats.rx.xdp_pass; + data[++count] = self->stats.rx.xdp_tx; + data[++count] = self->stats.rx.xdp_invalid; + data[++count] = self->stats.rx.xdp_redirect; + } while (u64_stats_fetch_retry_irq(&self->stats.rx.syncp, start)); + } else { + /* This data should mimic aq_ethtool_queue_tx_stat_names structure */ + do { + count = 0; + start = u64_stats_fetch_begin_irq(&self->stats.tx.syncp); + data[count] = self->stats.tx.packets; + data[++count] = self->stats.tx.queue_restarts; + } while (u64_stats_fetch_retry_irq(&self->stats.tx.syncp, start)); + } + + return ++count; +} |