| // 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_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) |
| goto pass; |
| |
| 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: |
| pass: |
| xdpf = xdp_convert_buff_to_frame(xdp); |
| if (unlikely(!xdpf)) |
| goto out_aborted; |
| skb = xdp_build_skb_from_frame(xdpf, aq_nic->ndev); |
| 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); |
| aq_get_rxpages_xdp(buff, xdp); |
| 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, |
| 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; |
| 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) |
| buff->len -= |
| aq_ptp_extract_ts(rx_ring->aq_nic, skb, |
| aq_buf_vaddr(&buff->rxdata), |
| buff->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 (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); |
| |
| 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); |
| } |
| |
| 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; |
| } |