Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
David VomLehn | 1154 | 42.95% | 1 | 3.85% |
Igor Russkikh | 808 | 30.07% | 8 | 30.77% |
Egor Pomozov | 284 | 10.57% | 2 | 7.69% |
Dmitry Bogdanov | 237 | 8.82% | 4 | 15.38% |
Pavel Belous | 136 | 5.06% | 4 | 15.38% |
Dmitry Bezrukov | 41 | 1.53% | 2 | 7.69% |
Friedemann Gerold | 18 | 0.67% | 1 | 3.85% |
Stanislav Fomichev | 4 | 0.15% | 1 | 3.85% |
Nikita Danilov | 3 | 0.11% | 1 | 3.85% |
Thomas Gleixner | 1 | 0.04% | 1 | 3.85% |
Dan Carpenter | 1 | 0.04% | 1 | 3.85% |
Total | 2687 | 26 |
// SPDX-License-Identifier: GPL-2.0-only /* * aQuantia Corporation Network Driver * Copyright (C) 2014-2019 aQuantia Corporation. All rights reserved */ /* File aq_ring.c: Definition of functions for Rx/Tx rings. */ #include "aq_ring.h" #include "aq_nic.h" #include "aq_hw.h" #include "aq_hw_utils.h" #include "aq_ptp.h" #include <linux/netdevice.h> #include <linux/etherdevice.h> 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_get_rxpage(struct aq_rxpage *rxpage, unsigned int order, struct device *dev) { 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 = 0; 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, int order) { 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 += AQ_CFG_RX_FRAME_MAX; if (rxbuf->rxdata.pg_off + AQ_CFG_RX_FRAME_MAX <= (PAGE_SIZE << order)) { self->stats.rx.pg_flips++; } 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)); self->stats.rx.pg_losts++; } } else { rxbuf->rxdata.pg_off = 0; self->stats.rx.pg_reuses++; } } if (!rxbuf->rxdata.page) { ret = aq_get_rxpage(&rxbuf->rxdata, order, aq_nic_get_dev(self->aq_nic)); 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->page_order = fls(AQ_CFG_RX_FRAME_MAX / PAGE_SIZE + (AQ_CFG_RX_FRAME_MAX % PAGE_SIZE ? 1 : 0)) - 1; if (aq_nic_cfg->rxpageorder > self->page_order) self->page_order = aq_nic_cfg->rxpageorder; 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) { self->hw_head = 0; self->sw_head = 0; self->sw_tail = 0; 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)); ring->stats.tx.queue_restarts++; } } 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 (unlikely(buff->is_eop)) { ++self->stats.rx.packets; self->stats.tx.bytes += buff->skb->len; dev_kfree_skb_any(buff->skb); } 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)) { ++self->stats.rx.errors; 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); } #define AQ_SKB_ALIGN SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) 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); bool is_rsc_completed = true; 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) { buff_ = buff; do { 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)) 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 { next_ = buff_->next, buff_ = &self->buff_ring[next_]; buff_->is_cleaned = true; } while (!buff_->is_eop); ++self->stats.rx.errors; continue; } } if (buff->is_error) { ++self->stats.rx.errors; 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); /* for single fragment packets use build_skb() */ if (buff->is_eop && buff->len <= AQ_CFG_RX_FRAME_MAX - AQ_SKB_ALIGN) { skb = build_skb(aq_buf_vaddr(&buff->rxdata), AQ_CFG_RX_FRAME_MAX); if (unlikely(!skb)) { err = -ENOMEM; goto err_exit; } if (is_ptp_ring) buff->len -= aq_ptp_extract_ts(self->aq_nic, skb, aq_buf_vaddr(&buff->rxdata), buff->len); skb_put(skb, buff->len); page_ref_inc(buff->rxdata.page); } else { skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE); if (unlikely(!skb)) { err = -ENOMEM; goto err_exit; } if (is_ptp_ring) buff->len -= aq_ptp_extract_ts(self->aq_nic, 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, 0, buff->rxdata.page, buff->rxdata.pg_off + hdr_len, buff->len - hdr_len, AQ_CFG_RX_FRAME_MAX); page_ref_inc(buff->rxdata.page); } if (!buff->is_eop) { buff_ = buff; i = 1U; 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, AQ_CFG_RX_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)); ++self->stats.rx.packets; self->stats.rx.bytes += skb->len; napi_gro_receive(napi, skb); } err_exit: return err; } void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic) { 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); } } int aq_ring_rx_fill(struct aq_ring_s *self) { unsigned int page_order = self->page_order; 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 = AQ_CFG_RX_FRAME_MAX; err = aq_get_rxpages(self, buff, page_order); 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) goto err_exit; 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)); } err_exit:; } void aq_ring_free(struct aq_ring_s *self) { if (!self) goto err_exit; kfree(self->buff_ring); 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); err_exit:; }
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