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1795 lines
48 KiB
1795 lines
48 KiB
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) |
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/* QLogic qede NIC Driver |
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* Copyright (c) 2015-2017 QLogic Corporation |
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* Copyright (c) 2019-2020 Marvell International Ltd. |
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*/ |
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|
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/skbuff.h> |
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#include <linux/bpf_trace.h> |
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#include <net/udp_tunnel.h> |
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#include <linux/ip.h> |
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#include <net/ipv6.h> |
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#include <net/tcp.h> |
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#include <linux/if_ether.h> |
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#include <linux/if_vlan.h> |
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#include <net/ip6_checksum.h> |
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#include "qede_ptp.h" |
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|
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#include <linux/qed/qed_if.h> |
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#include "qede.h" |
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/********************************* |
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* Content also used by slowpath * |
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*********************************/ |
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|
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int qede_alloc_rx_buffer(struct qede_rx_queue *rxq, bool allow_lazy) |
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{ |
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struct sw_rx_data *sw_rx_data; |
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struct eth_rx_bd *rx_bd; |
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dma_addr_t mapping; |
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struct page *data; |
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|
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/* In case lazy-allocation is allowed, postpone allocation until the |
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* end of the NAPI run. We'd still need to make sure the Rx ring has |
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* sufficient buffers to guarantee an additional Rx interrupt. |
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*/ |
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if (allow_lazy && likely(rxq->filled_buffers > 12)) { |
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rxq->filled_buffers--; |
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return 0; |
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} |
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|
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data = alloc_pages(GFP_ATOMIC, 0); |
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if (unlikely(!data)) |
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return -ENOMEM; |
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|
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/* Map the entire page as it would be used |
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* for multiple RX buffer segment size mapping. |
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*/ |
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mapping = dma_map_page(rxq->dev, data, 0, |
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PAGE_SIZE, rxq->data_direction); |
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if (unlikely(dma_mapping_error(rxq->dev, mapping))) { |
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__free_page(data); |
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return -ENOMEM; |
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} |
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|
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sw_rx_data = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; |
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sw_rx_data->page_offset = 0; |
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sw_rx_data->data = data; |
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sw_rx_data->mapping = mapping; |
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|
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/* Advance PROD and get BD pointer */ |
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rx_bd = (struct eth_rx_bd *)qed_chain_produce(&rxq->rx_bd_ring); |
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WARN_ON(!rx_bd); |
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rx_bd->addr.hi = cpu_to_le32(upper_32_bits(mapping)); |
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rx_bd->addr.lo = cpu_to_le32(lower_32_bits(mapping) + |
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rxq->rx_headroom); |
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|
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rxq->sw_rx_prod++; |
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rxq->filled_buffers++; |
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|
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return 0; |
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} |
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|
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/* Unmap the data and free skb */ |
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int qede_free_tx_pkt(struct qede_dev *edev, struct qede_tx_queue *txq, int *len) |
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{ |
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u16 idx = txq->sw_tx_cons; |
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struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; |
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struct eth_tx_1st_bd *first_bd; |
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struct eth_tx_bd *tx_data_bd; |
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int bds_consumed = 0; |
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int nbds; |
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bool data_split = txq->sw_tx_ring.skbs[idx].flags & QEDE_TSO_SPLIT_BD; |
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int i, split_bd_len = 0; |
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|
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if (unlikely(!skb)) { |
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DP_ERR(edev, |
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"skb is null for txq idx=%d txq->sw_tx_cons=%d txq->sw_tx_prod=%d\n", |
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idx, txq->sw_tx_cons, txq->sw_tx_prod); |
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return -1; |
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} |
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|
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*len = skb->len; |
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first_bd = (struct eth_tx_1st_bd *)qed_chain_consume(&txq->tx_pbl); |
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bds_consumed++; |
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nbds = first_bd->data.nbds; |
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|
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if (data_split) { |
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struct eth_tx_bd *split = (struct eth_tx_bd *) |
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qed_chain_consume(&txq->tx_pbl); |
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split_bd_len = BD_UNMAP_LEN(split); |
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bds_consumed++; |
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} |
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dma_unmap_single(&edev->pdev->dev, BD_UNMAP_ADDR(first_bd), |
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BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); |
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|
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/* Unmap the data of the skb frags */ |
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for (i = 0; i < skb_shinfo(skb)->nr_frags; i++, bds_consumed++) { |
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tx_data_bd = (struct eth_tx_bd *) |
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qed_chain_consume(&txq->tx_pbl); |
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dma_unmap_page(&edev->pdev->dev, BD_UNMAP_ADDR(tx_data_bd), |
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BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); |
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} |
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|
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while (bds_consumed++ < nbds) |
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qed_chain_consume(&txq->tx_pbl); |
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|
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/* Free skb */ |
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dev_kfree_skb_any(skb); |
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txq->sw_tx_ring.skbs[idx].skb = NULL; |
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txq->sw_tx_ring.skbs[idx].flags = 0; |
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|
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return 0; |
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} |
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|
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/* Unmap the data and free skb when mapping failed during start_xmit */ |
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static void qede_free_failed_tx_pkt(struct qede_tx_queue *txq, |
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struct eth_tx_1st_bd *first_bd, |
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int nbd, bool data_split) |
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{ |
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u16 idx = txq->sw_tx_prod; |
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struct sk_buff *skb = txq->sw_tx_ring.skbs[idx].skb; |
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struct eth_tx_bd *tx_data_bd; |
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int i, split_bd_len = 0; |
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|
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/* Return prod to its position before this skb was handled */ |
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qed_chain_set_prod(&txq->tx_pbl, |
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le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); |
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|
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first_bd = (struct eth_tx_1st_bd *)qed_chain_produce(&txq->tx_pbl); |
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|
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if (data_split) { |
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struct eth_tx_bd *split = (struct eth_tx_bd *) |
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qed_chain_produce(&txq->tx_pbl); |
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split_bd_len = BD_UNMAP_LEN(split); |
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nbd--; |
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} |
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|
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dma_unmap_single(txq->dev, BD_UNMAP_ADDR(first_bd), |
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BD_UNMAP_LEN(first_bd) + split_bd_len, DMA_TO_DEVICE); |
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|
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/* Unmap the data of the skb frags */ |
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for (i = 0; i < nbd; i++) { |
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tx_data_bd = (struct eth_tx_bd *) |
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qed_chain_produce(&txq->tx_pbl); |
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if (tx_data_bd->nbytes) |
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dma_unmap_page(txq->dev, |
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BD_UNMAP_ADDR(tx_data_bd), |
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BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE); |
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} |
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|
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/* Return again prod to its position before this skb was handled */ |
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qed_chain_set_prod(&txq->tx_pbl, |
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le16_to_cpu(txq->tx_db.data.bd_prod), first_bd); |
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|
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/* Free skb */ |
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dev_kfree_skb_any(skb); |
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txq->sw_tx_ring.skbs[idx].skb = NULL; |
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txq->sw_tx_ring.skbs[idx].flags = 0; |
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} |
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|
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static u32 qede_xmit_type(struct sk_buff *skb, int *ipv6_ext) |
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{ |
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u32 rc = XMIT_L4_CSUM; |
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__be16 l3_proto; |
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|
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if (skb->ip_summed != CHECKSUM_PARTIAL) |
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return XMIT_PLAIN; |
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|
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l3_proto = vlan_get_protocol(skb); |
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if (l3_proto == htons(ETH_P_IPV6) && |
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(ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) |
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*ipv6_ext = 1; |
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|
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if (skb->encapsulation) { |
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rc |= XMIT_ENC; |
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if (skb_is_gso(skb)) { |
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unsigned short gso_type = skb_shinfo(skb)->gso_type; |
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|
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if ((gso_type & SKB_GSO_UDP_TUNNEL_CSUM) || |
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(gso_type & SKB_GSO_GRE_CSUM)) |
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rc |= XMIT_ENC_GSO_L4_CSUM; |
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|
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rc |= XMIT_LSO; |
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return rc; |
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} |
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} |
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|
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if (skb_is_gso(skb)) |
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rc |= XMIT_LSO; |
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|
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return rc; |
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} |
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|
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static void qede_set_params_for_ipv6_ext(struct sk_buff *skb, |
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struct eth_tx_2nd_bd *second_bd, |
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struct eth_tx_3rd_bd *third_bd) |
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{ |
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u8 l4_proto; |
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u16 bd2_bits1 = 0, bd2_bits2 = 0; |
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|
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bd2_bits1 |= (1 << ETH_TX_DATA_2ND_BD_IPV6_EXT_SHIFT); |
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|
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bd2_bits2 |= ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) & |
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ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_MASK) |
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<< ETH_TX_DATA_2ND_BD_L4_HDR_START_OFFSET_W_SHIFT; |
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|
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bd2_bits1 |= (ETH_L4_PSEUDO_CSUM_CORRECT_LENGTH << |
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ETH_TX_DATA_2ND_BD_L4_PSEUDO_CSUM_MODE_SHIFT); |
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|
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if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) |
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l4_proto = ipv6_hdr(skb)->nexthdr; |
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else |
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l4_proto = ip_hdr(skb)->protocol; |
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|
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if (l4_proto == IPPROTO_UDP) |
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bd2_bits1 |= 1 << ETH_TX_DATA_2ND_BD_L4_UDP_SHIFT; |
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|
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if (third_bd) |
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third_bd->data.bitfields |= |
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cpu_to_le16(((tcp_hdrlen(skb) / 4) & |
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ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_MASK) << |
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ETH_TX_DATA_3RD_BD_TCP_HDR_LEN_DW_SHIFT); |
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|
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second_bd->data.bitfields1 = cpu_to_le16(bd2_bits1); |
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second_bd->data.bitfields2 = cpu_to_le16(bd2_bits2); |
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} |
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|
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static int map_frag_to_bd(struct qede_tx_queue *txq, |
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skb_frag_t *frag, struct eth_tx_bd *bd) |
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{ |
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dma_addr_t mapping; |
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|
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/* Map skb non-linear frag data for DMA */ |
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mapping = skb_frag_dma_map(txq->dev, frag, 0, |
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skb_frag_size(frag), DMA_TO_DEVICE); |
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if (unlikely(dma_mapping_error(txq->dev, mapping))) |
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return -ENOMEM; |
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|
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/* Setup the data pointer of the frag data */ |
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BD_SET_UNMAP_ADDR_LEN(bd, mapping, skb_frag_size(frag)); |
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|
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return 0; |
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} |
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|
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static u16 qede_get_skb_hlen(struct sk_buff *skb, bool is_encap_pkt) |
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{ |
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if (is_encap_pkt) |
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return (skb_inner_transport_header(skb) + |
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inner_tcp_hdrlen(skb) - skb->data); |
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else |
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return (skb_transport_header(skb) + |
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tcp_hdrlen(skb) - skb->data); |
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} |
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|
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/* +2 for 1st BD for headers and 2nd BD for headlen (if required) */ |
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#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) |
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static bool qede_pkt_req_lin(struct sk_buff *skb, u8 xmit_type) |
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{ |
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int allowed_frags = ETH_TX_MAX_BDS_PER_NON_LSO_PACKET - 1; |
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|
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if (xmit_type & XMIT_LSO) { |
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int hlen; |
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hlen = qede_get_skb_hlen(skb, xmit_type & XMIT_ENC); |
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|
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/* linear payload would require its own BD */ |
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if (skb_headlen(skb) > hlen) |
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allowed_frags--; |
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} |
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return (skb_shinfo(skb)->nr_frags > allowed_frags); |
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} |
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#endif |
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|
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static inline void qede_update_tx_producer(struct qede_tx_queue *txq) |
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{ |
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/* wmb makes sure that the BDs data is updated before updating the |
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* producer, otherwise FW may read old data from the BDs. |
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*/ |
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wmb(); |
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barrier(); |
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writel(txq->tx_db.raw, txq->doorbell_addr); |
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|
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/* Fence required to flush the write combined buffer, since another |
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* CPU may write to the same doorbell address and data may be lost |
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* due to relaxed order nature of write combined bar. |
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*/ |
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wmb(); |
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} |
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|
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static int qede_xdp_xmit(struct qede_tx_queue *txq, dma_addr_t dma, u16 pad, |
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u16 len, struct page *page, struct xdp_frame *xdpf) |
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{ |
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struct eth_tx_1st_bd *bd; |
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struct sw_tx_xdp *xdp; |
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u16 val; |
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|
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if (unlikely(qed_chain_get_elem_used(&txq->tx_pbl) >= |
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txq->num_tx_buffers)) { |
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txq->stopped_cnt++; |
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return -ENOMEM; |
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} |
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|
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bd = qed_chain_produce(&txq->tx_pbl); |
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bd->data.nbds = 1; |
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bd->data.bd_flags.bitfields = BIT(ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT); |
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|
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val = (len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << |
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ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT; |
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|
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bd->data.bitfields = cpu_to_le16(val); |
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|
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/* We can safely ignore the offset, as it's 0 for XDP */ |
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BD_SET_UNMAP_ADDR_LEN(bd, dma + pad, len); |
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|
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xdp = txq->sw_tx_ring.xdp + txq->sw_tx_prod; |
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xdp->mapping = dma; |
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xdp->page = page; |
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xdp->xdpf = xdpf; |
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|
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txq->sw_tx_prod = (txq->sw_tx_prod + 1) % txq->num_tx_buffers; |
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|
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return 0; |
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} |
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|
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int qede_xdp_transmit(struct net_device *dev, int n_frames, |
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struct xdp_frame **frames, u32 flags) |
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{ |
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struct qede_dev *edev = netdev_priv(dev); |
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struct device *dmadev = &edev->pdev->dev; |
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struct qede_tx_queue *xdp_tx; |
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struct xdp_frame *xdpf; |
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dma_addr_t mapping; |
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int i, nxmit = 0; |
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u16 xdp_prod; |
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|
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if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) |
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return -EINVAL; |
|
|
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if (unlikely(!netif_running(dev))) |
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return -ENETDOWN; |
|
|
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i = smp_processor_id() % edev->total_xdp_queues; |
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xdp_tx = edev->fp_array[i].xdp_tx; |
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|
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spin_lock(&xdp_tx->xdp_tx_lock); |
|
|
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for (i = 0; i < n_frames; i++) { |
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xdpf = frames[i]; |
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|
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mapping = dma_map_single(dmadev, xdpf->data, xdpf->len, |
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DMA_TO_DEVICE); |
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if (unlikely(dma_mapping_error(dmadev, mapping))) |
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break; |
|
|
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if (unlikely(qede_xdp_xmit(xdp_tx, mapping, 0, xdpf->len, |
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NULL, xdpf))) |
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break; |
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nxmit++; |
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} |
|
|
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if (flags & XDP_XMIT_FLUSH) { |
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xdp_prod = qed_chain_get_prod_idx(&xdp_tx->tx_pbl); |
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|
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xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); |
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qede_update_tx_producer(xdp_tx); |
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} |
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|
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spin_unlock(&xdp_tx->xdp_tx_lock); |
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|
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return nxmit; |
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} |
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|
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int qede_txq_has_work(struct qede_tx_queue *txq) |
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{ |
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u16 hw_bd_cons; |
|
|
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/* Tell compiler that consumer and producer can change */ |
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barrier(); |
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hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); |
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if (qed_chain_get_cons_idx(&txq->tx_pbl) == hw_bd_cons + 1) |
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return 0; |
|
|
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return hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl); |
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} |
|
|
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static void qede_xdp_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) |
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{ |
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struct sw_tx_xdp *xdp_info, *xdp_arr = txq->sw_tx_ring.xdp; |
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struct device *dev = &edev->pdev->dev; |
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struct xdp_frame *xdpf; |
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u16 hw_bd_cons; |
|
|
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hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); |
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barrier(); |
|
|
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while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { |
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xdp_info = xdp_arr + txq->sw_tx_cons; |
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xdpf = xdp_info->xdpf; |
|
|
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if (xdpf) { |
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dma_unmap_single(dev, xdp_info->mapping, xdpf->len, |
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DMA_TO_DEVICE); |
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xdp_return_frame(xdpf); |
|
|
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xdp_info->xdpf = NULL; |
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} else { |
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dma_unmap_page(dev, xdp_info->mapping, PAGE_SIZE, |
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DMA_BIDIRECTIONAL); |
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__free_page(xdp_info->page); |
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} |
|
|
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qed_chain_consume(&txq->tx_pbl); |
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txq->sw_tx_cons = (txq->sw_tx_cons + 1) % txq->num_tx_buffers; |
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txq->xmit_pkts++; |
|
} |
|
} |
|
|
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static int qede_tx_int(struct qede_dev *edev, struct qede_tx_queue *txq) |
|
{ |
|
unsigned int pkts_compl = 0, bytes_compl = 0; |
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struct netdev_queue *netdev_txq; |
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u16 hw_bd_cons; |
|
int rc; |
|
|
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netdev_txq = netdev_get_tx_queue(edev->ndev, txq->ndev_txq_id); |
|
|
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hw_bd_cons = le16_to_cpu(*txq->hw_cons_ptr); |
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barrier(); |
|
|
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while (hw_bd_cons != qed_chain_get_cons_idx(&txq->tx_pbl)) { |
|
int len = 0; |
|
|
|
rc = qede_free_tx_pkt(edev, txq, &len); |
|
if (rc) { |
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DP_NOTICE(edev, "hw_bd_cons = %d, chain_cons=%d\n", |
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hw_bd_cons, |
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qed_chain_get_cons_idx(&txq->tx_pbl)); |
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break; |
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} |
|
|
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bytes_compl += len; |
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pkts_compl++; |
|
txq->sw_tx_cons = (txq->sw_tx_cons + 1) % txq->num_tx_buffers; |
|
txq->xmit_pkts++; |
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} |
|
|
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netdev_tx_completed_queue(netdev_txq, pkts_compl, bytes_compl); |
|
|
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/* Need to make the tx_bd_cons update visible to start_xmit() |
|
* before checking for netif_tx_queue_stopped(). Without the |
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* memory barrier, there is a small possibility that |
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* start_xmit() will miss it and cause the queue to be stopped |
|
* forever. |
|
* On the other hand we need an rmb() here to ensure the proper |
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* ordering of bit testing in the following |
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* netif_tx_queue_stopped(txq) call. |
|
*/ |
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smp_mb(); |
|
|
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if (unlikely(netif_tx_queue_stopped(netdev_txq))) { |
|
/* Taking tx_lock is needed to prevent reenabling the queue |
|
* while it's empty. This could have happen if rx_action() gets |
|
* suspended in qede_tx_int() after the condition before |
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* netif_tx_wake_queue(), while tx_action (qede_start_xmit()): |
|
* |
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* stops the queue->sees fresh tx_bd_cons->releases the queue-> |
|
* sends some packets consuming the whole queue again-> |
|
* stops the queue |
|
*/ |
|
|
|
__netif_tx_lock(netdev_txq, smp_processor_id()); |
|
|
|
if ((netif_tx_queue_stopped(netdev_txq)) && |
|
(edev->state == QEDE_STATE_OPEN) && |
|
(qed_chain_get_elem_left(&txq->tx_pbl) |
|
>= (MAX_SKB_FRAGS + 1))) { |
|
netif_tx_wake_queue(netdev_txq); |
|
DP_VERBOSE(edev, NETIF_MSG_TX_DONE, |
|
"Wake queue was called\n"); |
|
} |
|
|
|
__netif_tx_unlock(netdev_txq); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
bool qede_has_rx_work(struct qede_rx_queue *rxq) |
|
{ |
|
u16 hw_comp_cons, sw_comp_cons; |
|
|
|
/* Tell compiler that status block fields can change */ |
|
barrier(); |
|
|
|
hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); |
|
sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); |
|
|
|
return hw_comp_cons != sw_comp_cons; |
|
} |
|
|
|
static inline void qede_rx_bd_ring_consume(struct qede_rx_queue *rxq) |
|
{ |
|
qed_chain_consume(&rxq->rx_bd_ring); |
|
rxq->sw_rx_cons++; |
|
} |
|
|
|
/* This function reuses the buffer(from an offset) from |
|
* consumer index to producer index in the bd ring |
|
*/ |
|
static inline void qede_reuse_page(struct qede_rx_queue *rxq, |
|
struct sw_rx_data *curr_cons) |
|
{ |
|
struct eth_rx_bd *rx_bd_prod = qed_chain_produce(&rxq->rx_bd_ring); |
|
struct sw_rx_data *curr_prod; |
|
dma_addr_t new_mapping; |
|
|
|
curr_prod = &rxq->sw_rx_ring[rxq->sw_rx_prod & NUM_RX_BDS_MAX]; |
|
*curr_prod = *curr_cons; |
|
|
|
new_mapping = curr_prod->mapping + curr_prod->page_offset; |
|
|
|
rx_bd_prod->addr.hi = cpu_to_le32(upper_32_bits(new_mapping)); |
|
rx_bd_prod->addr.lo = cpu_to_le32(lower_32_bits(new_mapping) + |
|
rxq->rx_headroom); |
|
|
|
rxq->sw_rx_prod++; |
|
curr_cons->data = NULL; |
|
} |
|
|
|
/* In case of allocation failures reuse buffers |
|
* from consumer index to produce buffers for firmware |
|
*/ |
|
void qede_recycle_rx_bd_ring(struct qede_rx_queue *rxq, u8 count) |
|
{ |
|
struct sw_rx_data *curr_cons; |
|
|
|
for (; count > 0; count--) { |
|
curr_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; |
|
qede_reuse_page(rxq, curr_cons); |
|
qede_rx_bd_ring_consume(rxq); |
|
} |
|
} |
|
|
|
static inline int qede_realloc_rx_buffer(struct qede_rx_queue *rxq, |
|
struct sw_rx_data *curr_cons) |
|
{ |
|
/* Move to the next segment in the page */ |
|
curr_cons->page_offset += rxq->rx_buf_seg_size; |
|
|
|
if (curr_cons->page_offset == PAGE_SIZE) { |
|
if (unlikely(qede_alloc_rx_buffer(rxq, true))) { |
|
/* Since we failed to allocate new buffer |
|
* current buffer can be used again. |
|
*/ |
|
curr_cons->page_offset -= rxq->rx_buf_seg_size; |
|
|
|
return -ENOMEM; |
|
} |
|
|
|
dma_unmap_page(rxq->dev, curr_cons->mapping, |
|
PAGE_SIZE, rxq->data_direction); |
|
} else { |
|
/* Increment refcount of the page as we don't want |
|
* network stack to take the ownership of the page |
|
* which can be recycled multiple times by the driver. |
|
*/ |
|
page_ref_inc(curr_cons->data); |
|
qede_reuse_page(rxq, curr_cons); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void qede_update_rx_prod(struct qede_dev *edev, struct qede_rx_queue *rxq) |
|
{ |
|
u16 bd_prod = qed_chain_get_prod_idx(&rxq->rx_bd_ring); |
|
u16 cqe_prod = qed_chain_get_prod_idx(&rxq->rx_comp_ring); |
|
struct eth_rx_prod_data rx_prods = {0}; |
|
|
|
/* Update producers */ |
|
rx_prods.bd_prod = cpu_to_le16(bd_prod); |
|
rx_prods.cqe_prod = cpu_to_le16(cqe_prod); |
|
|
|
/* Make sure that the BD and SGE data is updated before updating the |
|
* producers since FW might read the BD/SGE right after the producer |
|
* is updated. |
|
*/ |
|
wmb(); |
|
|
|
internal_ram_wr(rxq->hw_rxq_prod_addr, sizeof(rx_prods), |
|
(u32 *)&rx_prods); |
|
} |
|
|
|
static void qede_get_rxhash(struct sk_buff *skb, u8 bitfields, __le32 rss_hash) |
|
{ |
|
enum pkt_hash_types hash_type = PKT_HASH_TYPE_NONE; |
|
enum rss_hash_type htype; |
|
u32 hash = 0; |
|
|
|
htype = GET_FIELD(bitfields, ETH_FAST_PATH_RX_REG_CQE_RSS_HASH_TYPE); |
|
if (htype) { |
|
hash_type = ((htype == RSS_HASH_TYPE_IPV4) || |
|
(htype == RSS_HASH_TYPE_IPV6)) ? |
|
PKT_HASH_TYPE_L3 : PKT_HASH_TYPE_L4; |
|
hash = le32_to_cpu(rss_hash); |
|
} |
|
skb_set_hash(skb, hash, hash_type); |
|
} |
|
|
|
static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag) |
|
{ |
|
skb_checksum_none_assert(skb); |
|
|
|
if (csum_flag & QEDE_CSUM_UNNECESSARY) |
|
skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
|
|
if (csum_flag & QEDE_TUNN_CSUM_UNNECESSARY) { |
|
skb->csum_level = 1; |
|
skb->encapsulation = 1; |
|
} |
|
} |
|
|
|
static inline void qede_skb_receive(struct qede_dev *edev, |
|
struct qede_fastpath *fp, |
|
struct qede_rx_queue *rxq, |
|
struct sk_buff *skb, u16 vlan_tag) |
|
{ |
|
if (vlan_tag) |
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag); |
|
|
|
napi_gro_receive(&fp->napi, skb); |
|
} |
|
|
|
static void qede_set_gro_params(struct qede_dev *edev, |
|
struct sk_buff *skb, |
|
struct eth_fast_path_rx_tpa_start_cqe *cqe) |
|
{ |
|
u16 parsing_flags = le16_to_cpu(cqe->pars_flags.flags); |
|
|
|
if (((parsing_flags >> PARSING_AND_ERR_FLAGS_L3TYPE_SHIFT) & |
|
PARSING_AND_ERR_FLAGS_L3TYPE_MASK) == 2) |
|
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; |
|
else |
|
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; |
|
|
|
skb_shinfo(skb)->gso_size = __le16_to_cpu(cqe->len_on_first_bd) - |
|
cqe->header_len; |
|
} |
|
|
|
static int qede_fill_frag_skb(struct qede_dev *edev, |
|
struct qede_rx_queue *rxq, |
|
u8 tpa_agg_index, u16 len_on_bd) |
|
{ |
|
struct sw_rx_data *current_bd = &rxq->sw_rx_ring[rxq->sw_rx_cons & |
|
NUM_RX_BDS_MAX]; |
|
struct qede_agg_info *tpa_info = &rxq->tpa_info[tpa_agg_index]; |
|
struct sk_buff *skb = tpa_info->skb; |
|
|
|
if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) |
|
goto out; |
|
|
|
/* Add one frag and update the appropriate fields in the skb */ |
|
skb_fill_page_desc(skb, tpa_info->frag_id++, |
|
current_bd->data, |
|
current_bd->page_offset + rxq->rx_headroom, |
|
len_on_bd); |
|
|
|
if (unlikely(qede_realloc_rx_buffer(rxq, current_bd))) { |
|
/* Incr page ref count to reuse on allocation failure |
|
* so that it doesn't get freed while freeing SKB. |
|
*/ |
|
page_ref_inc(current_bd->data); |
|
goto out; |
|
} |
|
|
|
qede_rx_bd_ring_consume(rxq); |
|
|
|
skb->data_len += len_on_bd; |
|
skb->truesize += rxq->rx_buf_seg_size; |
|
skb->len += len_on_bd; |
|
|
|
return 0; |
|
|
|
out: |
|
tpa_info->state = QEDE_AGG_STATE_ERROR; |
|
qede_recycle_rx_bd_ring(rxq, 1); |
|
|
|
return -ENOMEM; |
|
} |
|
|
|
static bool qede_tunn_exist(u16 flag) |
|
{ |
|
return !!(flag & (PARSING_AND_ERR_FLAGS_TUNNELEXIST_MASK << |
|
PARSING_AND_ERR_FLAGS_TUNNELEXIST_SHIFT)); |
|
} |
|
|
|
static u8 qede_check_tunn_csum(u16 flag) |
|
{ |
|
u16 csum_flag = 0; |
|
u8 tcsum = 0; |
|
|
|
if (flag & (PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_MASK << |
|
PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_SHIFT)) |
|
csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_MASK << |
|
PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_SHIFT; |
|
|
|
if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << |
|
PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { |
|
csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << |
|
PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; |
|
tcsum = QEDE_TUNN_CSUM_UNNECESSARY; |
|
} |
|
|
|
csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_MASK << |
|
PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_SHIFT | |
|
PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << |
|
PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; |
|
|
|
if (csum_flag & flag) |
|
return QEDE_CSUM_ERROR; |
|
|
|
return QEDE_CSUM_UNNECESSARY | tcsum; |
|
} |
|
|
|
static inline struct sk_buff * |
|
qede_build_skb(struct qede_rx_queue *rxq, |
|
struct sw_rx_data *bd, u16 len, u16 pad) |
|
{ |
|
struct sk_buff *skb; |
|
void *buf; |
|
|
|
buf = page_address(bd->data) + bd->page_offset; |
|
skb = build_skb(buf, rxq->rx_buf_seg_size); |
|
|
|
skb_reserve(skb, pad); |
|
skb_put(skb, len); |
|
|
|
return skb; |
|
} |
|
|
|
static struct sk_buff * |
|
qede_tpa_rx_build_skb(struct qede_dev *edev, |
|
struct qede_rx_queue *rxq, |
|
struct sw_rx_data *bd, u16 len, u16 pad, |
|
bool alloc_skb) |
|
{ |
|
struct sk_buff *skb; |
|
|
|
skb = qede_build_skb(rxq, bd, len, pad); |
|
bd->page_offset += rxq->rx_buf_seg_size; |
|
|
|
if (bd->page_offset == PAGE_SIZE) { |
|
if (unlikely(qede_alloc_rx_buffer(rxq, true))) { |
|
DP_NOTICE(edev, |
|
"Failed to allocate RX buffer for tpa start\n"); |
|
bd->page_offset -= rxq->rx_buf_seg_size; |
|
page_ref_inc(bd->data); |
|
dev_kfree_skb_any(skb); |
|
return NULL; |
|
} |
|
} else { |
|
page_ref_inc(bd->data); |
|
qede_reuse_page(rxq, bd); |
|
} |
|
|
|
/* We've consumed the first BD and prepared an SKB */ |
|
qede_rx_bd_ring_consume(rxq); |
|
|
|
return skb; |
|
} |
|
|
|
static struct sk_buff * |
|
qede_rx_build_skb(struct qede_dev *edev, |
|
struct qede_rx_queue *rxq, |
|
struct sw_rx_data *bd, u16 len, u16 pad) |
|
{ |
|
struct sk_buff *skb = NULL; |
|
|
|
/* For smaller frames still need to allocate skb, memcpy |
|
* data and benefit in reusing the page segment instead of |
|
* un-mapping it. |
|
*/ |
|
if ((len + pad <= edev->rx_copybreak)) { |
|
unsigned int offset = bd->page_offset + pad; |
|
|
|
skb = netdev_alloc_skb(edev->ndev, QEDE_RX_HDR_SIZE); |
|
if (unlikely(!skb)) |
|
return NULL; |
|
|
|
skb_reserve(skb, pad); |
|
skb_put_data(skb, page_address(bd->data) + offset, len); |
|
qede_reuse_page(rxq, bd); |
|
goto out; |
|
} |
|
|
|
skb = qede_build_skb(rxq, bd, len, pad); |
|
|
|
if (unlikely(qede_realloc_rx_buffer(rxq, bd))) { |
|
/* Incr page ref count to reuse on allocation failure so |
|
* that it doesn't get freed while freeing SKB [as its |
|
* already mapped there]. |
|
*/ |
|
page_ref_inc(bd->data); |
|
dev_kfree_skb_any(skb); |
|
return NULL; |
|
} |
|
out: |
|
/* We've consumed the first BD and prepared an SKB */ |
|
qede_rx_bd_ring_consume(rxq); |
|
|
|
return skb; |
|
} |
|
|
|
static void qede_tpa_start(struct qede_dev *edev, |
|
struct qede_rx_queue *rxq, |
|
struct eth_fast_path_rx_tpa_start_cqe *cqe) |
|
{ |
|
struct qede_agg_info *tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; |
|
struct sw_rx_data *sw_rx_data_cons; |
|
u16 pad; |
|
|
|
sw_rx_data_cons = &rxq->sw_rx_ring[rxq->sw_rx_cons & NUM_RX_BDS_MAX]; |
|
pad = cqe->placement_offset + rxq->rx_headroom; |
|
|
|
tpa_info->skb = qede_tpa_rx_build_skb(edev, rxq, sw_rx_data_cons, |
|
le16_to_cpu(cqe->len_on_first_bd), |
|
pad, false); |
|
tpa_info->buffer.page_offset = sw_rx_data_cons->page_offset; |
|
tpa_info->buffer.mapping = sw_rx_data_cons->mapping; |
|
|
|
if (unlikely(!tpa_info->skb)) { |
|
DP_NOTICE(edev, "Failed to allocate SKB for gro\n"); |
|
|
|
/* Consume from ring but do not produce since |
|
* this might be used by FW still, it will be re-used |
|
* at TPA end. |
|
*/ |
|
tpa_info->tpa_start_fail = true; |
|
qede_rx_bd_ring_consume(rxq); |
|
tpa_info->state = QEDE_AGG_STATE_ERROR; |
|
goto cons_buf; |
|
} |
|
|
|
tpa_info->frag_id = 0; |
|
tpa_info->state = QEDE_AGG_STATE_START; |
|
|
|
if ((le16_to_cpu(cqe->pars_flags.flags) >> |
|
PARSING_AND_ERR_FLAGS_TAG8021QEXIST_SHIFT) & |
|
PARSING_AND_ERR_FLAGS_TAG8021QEXIST_MASK) |
|
tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag); |
|
else |
|
tpa_info->vlan_tag = 0; |
|
|
|
qede_get_rxhash(tpa_info->skb, cqe->bitfields, cqe->rss_hash); |
|
|
|
/* This is needed in order to enable forwarding support */ |
|
qede_set_gro_params(edev, tpa_info->skb, cqe); |
|
|
|
cons_buf: /* We still need to handle bd_len_list to consume buffers */ |
|
if (likely(cqe->bw_ext_bd_len_list[0])) |
|
qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, |
|
le16_to_cpu(cqe->bw_ext_bd_len_list[0])); |
|
|
|
if (unlikely(cqe->bw_ext_bd_len_list[1])) { |
|
DP_ERR(edev, |
|
"Unlikely - got a TPA aggregation with more than one bw_ext_bd_len_list entry in the TPA start\n"); |
|
tpa_info->state = QEDE_AGG_STATE_ERROR; |
|
} |
|
} |
|
|
|
#ifdef CONFIG_INET |
|
static void qede_gro_ip_csum(struct sk_buff *skb) |
|
{ |
|
const struct iphdr *iph = ip_hdr(skb); |
|
struct tcphdr *th; |
|
|
|
skb_set_transport_header(skb, sizeof(struct iphdr)); |
|
th = tcp_hdr(skb); |
|
|
|
th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb), |
|
iph->saddr, iph->daddr, 0); |
|
|
|
tcp_gro_complete(skb); |
|
} |
|
|
|
static void qede_gro_ipv6_csum(struct sk_buff *skb) |
|
{ |
|
struct ipv6hdr *iph = ipv6_hdr(skb); |
|
struct tcphdr *th; |
|
|
|
skb_set_transport_header(skb, sizeof(struct ipv6hdr)); |
|
th = tcp_hdr(skb); |
|
|
|
th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb), |
|
&iph->saddr, &iph->daddr, 0); |
|
tcp_gro_complete(skb); |
|
} |
|
#endif |
|
|
|
static void qede_gro_receive(struct qede_dev *edev, |
|
struct qede_fastpath *fp, |
|
struct sk_buff *skb, |
|
u16 vlan_tag) |
|
{ |
|
/* FW can send a single MTU sized packet from gro flow |
|
* due to aggregation timeout/last segment etc. which |
|
* is not expected to be a gro packet. If a skb has zero |
|
* frags then simply push it in the stack as non gso skb. |
|
*/ |
|
if (unlikely(!skb->data_len)) { |
|
skb_shinfo(skb)->gso_type = 0; |
|
skb_shinfo(skb)->gso_size = 0; |
|
goto send_skb; |
|
} |
|
|
|
#ifdef CONFIG_INET |
|
if (skb_shinfo(skb)->gso_size) { |
|
skb_reset_network_header(skb); |
|
|
|
switch (skb->protocol) { |
|
case htons(ETH_P_IP): |
|
qede_gro_ip_csum(skb); |
|
break; |
|
case htons(ETH_P_IPV6): |
|
qede_gro_ipv6_csum(skb); |
|
break; |
|
default: |
|
DP_ERR(edev, |
|
"Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n", |
|
ntohs(skb->protocol)); |
|
} |
|
} |
|
#endif |
|
|
|
send_skb: |
|
skb_record_rx_queue(skb, fp->rxq->rxq_id); |
|
qede_skb_receive(edev, fp, fp->rxq, skb, vlan_tag); |
|
} |
|
|
|
static inline void qede_tpa_cont(struct qede_dev *edev, |
|
struct qede_rx_queue *rxq, |
|
struct eth_fast_path_rx_tpa_cont_cqe *cqe) |
|
{ |
|
int i; |
|
|
|
for (i = 0; cqe->len_list[i]; i++) |
|
qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, |
|
le16_to_cpu(cqe->len_list[i])); |
|
|
|
if (unlikely(i > 1)) |
|
DP_ERR(edev, |
|
"Strange - TPA cont with more than a single len_list entry\n"); |
|
} |
|
|
|
static int qede_tpa_end(struct qede_dev *edev, |
|
struct qede_fastpath *fp, |
|
struct eth_fast_path_rx_tpa_end_cqe *cqe) |
|
{ |
|
struct qede_rx_queue *rxq = fp->rxq; |
|
struct qede_agg_info *tpa_info; |
|
struct sk_buff *skb; |
|
int i; |
|
|
|
tpa_info = &rxq->tpa_info[cqe->tpa_agg_index]; |
|
skb = tpa_info->skb; |
|
|
|
if (tpa_info->buffer.page_offset == PAGE_SIZE) |
|
dma_unmap_page(rxq->dev, tpa_info->buffer.mapping, |
|
PAGE_SIZE, rxq->data_direction); |
|
|
|
for (i = 0; cqe->len_list[i]; i++) |
|
qede_fill_frag_skb(edev, rxq, cqe->tpa_agg_index, |
|
le16_to_cpu(cqe->len_list[i])); |
|
if (unlikely(i > 1)) |
|
DP_ERR(edev, |
|
"Strange - TPA emd with more than a single len_list entry\n"); |
|
|
|
if (unlikely(tpa_info->state != QEDE_AGG_STATE_START)) |
|
goto err; |
|
|
|
/* Sanity */ |
|
if (unlikely(cqe->num_of_bds != tpa_info->frag_id + 1)) |
|
DP_ERR(edev, |
|
"Strange - TPA had %02x BDs, but SKB has only %d frags\n", |
|
cqe->num_of_bds, tpa_info->frag_id); |
|
if (unlikely(skb->len != le16_to_cpu(cqe->total_packet_len))) |
|
DP_ERR(edev, |
|
"Strange - total packet len [cqe] is %4x but SKB has len %04x\n", |
|
le16_to_cpu(cqe->total_packet_len), skb->len); |
|
|
|
/* Finalize the SKB */ |
|
skb->protocol = eth_type_trans(skb, edev->ndev); |
|
skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
|
|
/* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count |
|
* to skb_shinfo(skb)->gso_segs |
|
*/ |
|
NAPI_GRO_CB(skb)->count = le16_to_cpu(cqe->num_of_coalesced_segs); |
|
|
|
qede_gro_receive(edev, fp, skb, tpa_info->vlan_tag); |
|
|
|
tpa_info->state = QEDE_AGG_STATE_NONE; |
|
|
|
return 1; |
|
err: |
|
tpa_info->state = QEDE_AGG_STATE_NONE; |
|
|
|
if (tpa_info->tpa_start_fail) { |
|
qede_reuse_page(rxq, &tpa_info->buffer); |
|
tpa_info->tpa_start_fail = false; |
|
} |
|
|
|
dev_kfree_skb_any(tpa_info->skb); |
|
tpa_info->skb = NULL; |
|
return 0; |
|
} |
|
|
|
static u8 qede_check_notunn_csum(u16 flag) |
|
{ |
|
u16 csum_flag = 0; |
|
u8 csum = 0; |
|
|
|
if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK << |
|
PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) { |
|
csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK << |
|
PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT; |
|
csum = QEDE_CSUM_UNNECESSARY; |
|
} |
|
|
|
csum_flag |= PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK << |
|
PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT; |
|
|
|
if (csum_flag & flag) |
|
return QEDE_CSUM_ERROR; |
|
|
|
return csum; |
|
} |
|
|
|
static u8 qede_check_csum(u16 flag) |
|
{ |
|
if (!qede_tunn_exist(flag)) |
|
return qede_check_notunn_csum(flag); |
|
else |
|
return qede_check_tunn_csum(flag); |
|
} |
|
|
|
static bool qede_pkt_is_ip_fragmented(struct eth_fast_path_rx_reg_cqe *cqe, |
|
u16 flag) |
|
{ |
|
u8 tun_pars_flg = cqe->tunnel_pars_flags.flags; |
|
|
|
if ((tun_pars_flg & (ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_MASK << |
|
ETH_TUNNEL_PARSING_FLAGS_IPV4_FRAGMENT_SHIFT)) || |
|
(flag & (PARSING_AND_ERR_FLAGS_IPV4FRAG_MASK << |
|
PARSING_AND_ERR_FLAGS_IPV4FRAG_SHIFT))) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
/* Return true iff packet is to be passed to stack */ |
|
static bool qede_rx_xdp(struct qede_dev *edev, |
|
struct qede_fastpath *fp, |
|
struct qede_rx_queue *rxq, |
|
struct bpf_prog *prog, |
|
struct sw_rx_data *bd, |
|
struct eth_fast_path_rx_reg_cqe *cqe, |
|
u16 *data_offset, u16 *len) |
|
{ |
|
struct xdp_buff xdp; |
|
enum xdp_action act; |
|
|
|
xdp_init_buff(&xdp, rxq->rx_buf_seg_size, &rxq->xdp_rxq); |
|
xdp_prepare_buff(&xdp, page_address(bd->data), *data_offset, |
|
*len, false); |
|
|
|
act = bpf_prog_run_xdp(prog, &xdp); |
|
|
|
/* Recalculate, as XDP might have changed the headers */ |
|
*data_offset = xdp.data - xdp.data_hard_start; |
|
*len = xdp.data_end - xdp.data; |
|
|
|
if (act == XDP_PASS) |
|
return true; |
|
|
|
/* Count number of packets not to be passed to stack */ |
|
rxq->xdp_no_pass++; |
|
|
|
switch (act) { |
|
case XDP_TX: |
|
/* We need the replacement buffer before transmit. */ |
|
if (unlikely(qede_alloc_rx_buffer(rxq, true))) { |
|
qede_recycle_rx_bd_ring(rxq, 1); |
|
|
|
trace_xdp_exception(edev->ndev, prog, act); |
|
break; |
|
} |
|
|
|
/* Now if there's a transmission problem, we'd still have to |
|
* throw current buffer, as replacement was already allocated. |
|
*/ |
|
if (unlikely(qede_xdp_xmit(fp->xdp_tx, bd->mapping, |
|
*data_offset, *len, bd->data, |
|
NULL))) { |
|
dma_unmap_page(rxq->dev, bd->mapping, PAGE_SIZE, |
|
rxq->data_direction); |
|
__free_page(bd->data); |
|
|
|
trace_xdp_exception(edev->ndev, prog, act); |
|
} else { |
|
dma_sync_single_for_device(rxq->dev, |
|
bd->mapping + *data_offset, |
|
*len, rxq->data_direction); |
|
fp->xdp_xmit |= QEDE_XDP_TX; |
|
} |
|
|
|
/* Regardless, we've consumed an Rx BD */ |
|
qede_rx_bd_ring_consume(rxq); |
|
break; |
|
case XDP_REDIRECT: |
|
/* We need the replacement buffer before transmit. */ |
|
if (unlikely(qede_alloc_rx_buffer(rxq, true))) { |
|
qede_recycle_rx_bd_ring(rxq, 1); |
|
|
|
trace_xdp_exception(edev->ndev, prog, act); |
|
break; |
|
} |
|
|
|
dma_unmap_page(rxq->dev, bd->mapping, PAGE_SIZE, |
|
rxq->data_direction); |
|
|
|
if (unlikely(xdp_do_redirect(edev->ndev, &xdp, prog))) |
|
DP_NOTICE(edev, "Failed to redirect the packet\n"); |
|
else |
|
fp->xdp_xmit |= QEDE_XDP_REDIRECT; |
|
|
|
qede_rx_bd_ring_consume(rxq); |
|
break; |
|
default: |
|
bpf_warn_invalid_xdp_action(act); |
|
fallthrough; |
|
case XDP_ABORTED: |
|
trace_xdp_exception(edev->ndev, prog, act); |
|
fallthrough; |
|
case XDP_DROP: |
|
qede_recycle_rx_bd_ring(rxq, cqe->bd_num); |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static int qede_rx_build_jumbo(struct qede_dev *edev, |
|
struct qede_rx_queue *rxq, |
|
struct sk_buff *skb, |
|
struct eth_fast_path_rx_reg_cqe *cqe, |
|
u16 first_bd_len) |
|
{ |
|
u16 pkt_len = le16_to_cpu(cqe->pkt_len); |
|
struct sw_rx_data *bd; |
|
u16 bd_cons_idx; |
|
u8 num_frags; |
|
|
|
pkt_len -= first_bd_len; |
|
|
|
/* We've already used one BD for the SKB. Now take care of the rest */ |
|
for (num_frags = cqe->bd_num - 1; num_frags > 0; num_frags--) { |
|
u16 cur_size = pkt_len > rxq->rx_buf_size ? rxq->rx_buf_size : |
|
pkt_len; |
|
|
|
if (unlikely(!cur_size)) { |
|
DP_ERR(edev, |
|
"Still got %d BDs for mapping jumbo, but length became 0\n", |
|
num_frags); |
|
goto out; |
|
} |
|
|
|
/* We need a replacement buffer for each BD */ |
|
if (unlikely(qede_alloc_rx_buffer(rxq, true))) |
|
goto out; |
|
|
|
/* Now that we've allocated the replacement buffer, |
|
* we can safely consume the next BD and map it to the SKB. |
|
*/ |
|
bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; |
|
bd = &rxq->sw_rx_ring[bd_cons_idx]; |
|
qede_rx_bd_ring_consume(rxq); |
|
|
|
dma_unmap_page(rxq->dev, bd->mapping, |
|
PAGE_SIZE, DMA_FROM_DEVICE); |
|
|
|
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, bd->data, |
|
rxq->rx_headroom, cur_size, PAGE_SIZE); |
|
|
|
pkt_len -= cur_size; |
|
} |
|
|
|
if (unlikely(pkt_len)) |
|
DP_ERR(edev, |
|
"Mapped all BDs of jumbo, but still have %d bytes\n", |
|
pkt_len); |
|
|
|
out: |
|
return num_frags; |
|
} |
|
|
|
static int qede_rx_process_tpa_cqe(struct qede_dev *edev, |
|
struct qede_fastpath *fp, |
|
struct qede_rx_queue *rxq, |
|
union eth_rx_cqe *cqe, |
|
enum eth_rx_cqe_type type) |
|
{ |
|
switch (type) { |
|
case ETH_RX_CQE_TYPE_TPA_START: |
|
qede_tpa_start(edev, rxq, &cqe->fast_path_tpa_start); |
|
return 0; |
|
case ETH_RX_CQE_TYPE_TPA_CONT: |
|
qede_tpa_cont(edev, rxq, &cqe->fast_path_tpa_cont); |
|
return 0; |
|
case ETH_RX_CQE_TYPE_TPA_END: |
|
return qede_tpa_end(edev, fp, &cqe->fast_path_tpa_end); |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static int qede_rx_process_cqe(struct qede_dev *edev, |
|
struct qede_fastpath *fp, |
|
struct qede_rx_queue *rxq) |
|
{ |
|
struct bpf_prog *xdp_prog = READ_ONCE(rxq->xdp_prog); |
|
struct eth_fast_path_rx_reg_cqe *fp_cqe; |
|
u16 len, pad, bd_cons_idx, parse_flag; |
|
enum eth_rx_cqe_type cqe_type; |
|
union eth_rx_cqe *cqe; |
|
struct sw_rx_data *bd; |
|
struct sk_buff *skb; |
|
__le16 flags; |
|
u8 csum_flag; |
|
|
|
/* Get the CQE from the completion ring */ |
|
cqe = (union eth_rx_cqe *)qed_chain_consume(&rxq->rx_comp_ring); |
|
cqe_type = cqe->fast_path_regular.type; |
|
|
|
/* Process an unlikely slowpath event */ |
|
if (unlikely(cqe_type == ETH_RX_CQE_TYPE_SLOW_PATH)) { |
|
struct eth_slow_path_rx_cqe *sp_cqe; |
|
|
|
sp_cqe = (struct eth_slow_path_rx_cqe *)cqe; |
|
edev->ops->eth_cqe_completion(edev->cdev, fp->id, sp_cqe); |
|
return 0; |
|
} |
|
|
|
/* Handle TPA cqes */ |
|
if (cqe_type != ETH_RX_CQE_TYPE_REGULAR) |
|
return qede_rx_process_tpa_cqe(edev, fp, rxq, cqe, cqe_type); |
|
|
|
/* Get the data from the SW ring; Consume it only after it's evident |
|
* we wouldn't recycle it. |
|
*/ |
|
bd_cons_idx = rxq->sw_rx_cons & NUM_RX_BDS_MAX; |
|
bd = &rxq->sw_rx_ring[bd_cons_idx]; |
|
|
|
fp_cqe = &cqe->fast_path_regular; |
|
len = le16_to_cpu(fp_cqe->len_on_first_bd); |
|
pad = fp_cqe->placement_offset + rxq->rx_headroom; |
|
|
|
/* Run eBPF program if one is attached */ |
|
if (xdp_prog) |
|
if (!qede_rx_xdp(edev, fp, rxq, xdp_prog, bd, fp_cqe, |
|
&pad, &len)) |
|
return 0; |
|
|
|
/* If this is an error packet then drop it */ |
|
flags = cqe->fast_path_regular.pars_flags.flags; |
|
parse_flag = le16_to_cpu(flags); |
|
|
|
csum_flag = qede_check_csum(parse_flag); |
|
if (unlikely(csum_flag == QEDE_CSUM_ERROR)) { |
|
if (qede_pkt_is_ip_fragmented(fp_cqe, parse_flag)) |
|
rxq->rx_ip_frags++; |
|
else |
|
rxq->rx_hw_errors++; |
|
} |
|
|
|
/* Basic validation passed; Need to prepare an SKB. This would also |
|
* guarantee to finally consume the first BD upon success. |
|
*/ |
|
skb = qede_rx_build_skb(edev, rxq, bd, len, pad); |
|
if (!skb) { |
|
rxq->rx_alloc_errors++; |
|
qede_recycle_rx_bd_ring(rxq, fp_cqe->bd_num); |
|
return 0; |
|
} |
|
|
|
/* In case of Jumbo packet, several PAGE_SIZEd buffers will be pointed |
|
* by a single cqe. |
|
*/ |
|
if (fp_cqe->bd_num > 1) { |
|
u16 unmapped_frags = qede_rx_build_jumbo(edev, rxq, skb, |
|
fp_cqe, len); |
|
|
|
if (unlikely(unmapped_frags > 0)) { |
|
qede_recycle_rx_bd_ring(rxq, unmapped_frags); |
|
dev_kfree_skb_any(skb); |
|
return 0; |
|
} |
|
} |
|
|
|
/* The SKB contains all the data. Now prepare meta-magic */ |
|
skb->protocol = eth_type_trans(skb, edev->ndev); |
|
qede_get_rxhash(skb, fp_cqe->bitfields, fp_cqe->rss_hash); |
|
qede_set_skb_csum(skb, csum_flag); |
|
skb_record_rx_queue(skb, rxq->rxq_id); |
|
qede_ptp_record_rx_ts(edev, cqe, skb); |
|
|
|
/* SKB is prepared - pass it to stack */ |
|
qede_skb_receive(edev, fp, rxq, skb, le16_to_cpu(fp_cqe->vlan_tag)); |
|
|
|
return 1; |
|
} |
|
|
|
static int qede_rx_int(struct qede_fastpath *fp, int budget) |
|
{ |
|
struct qede_rx_queue *rxq = fp->rxq; |
|
struct qede_dev *edev = fp->edev; |
|
int work_done = 0, rcv_pkts = 0; |
|
u16 hw_comp_cons, sw_comp_cons; |
|
|
|
hw_comp_cons = le16_to_cpu(*rxq->hw_cons_ptr); |
|
sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); |
|
|
|
/* Memory barrier to prevent the CPU from doing speculative reads of CQE |
|
* / BD in the while-loop before reading hw_comp_cons. If the CQE is |
|
* read before it is written by FW, then FW writes CQE and SB, and then |
|
* the CPU reads the hw_comp_cons, it will use an old CQE. |
|
*/ |
|
rmb(); |
|
|
|
/* Loop to complete all indicated BDs */ |
|
while ((sw_comp_cons != hw_comp_cons) && (work_done < budget)) { |
|
rcv_pkts += qede_rx_process_cqe(edev, fp, rxq); |
|
qed_chain_recycle_consumed(&rxq->rx_comp_ring); |
|
sw_comp_cons = qed_chain_get_cons_idx(&rxq->rx_comp_ring); |
|
work_done++; |
|
} |
|
|
|
rxq->rcv_pkts += rcv_pkts; |
|
|
|
/* Allocate replacement buffers */ |
|
while (rxq->num_rx_buffers - rxq->filled_buffers) |
|
if (qede_alloc_rx_buffer(rxq, false)) |
|
break; |
|
|
|
/* Update producers */ |
|
qede_update_rx_prod(edev, rxq); |
|
|
|
return work_done; |
|
} |
|
|
|
static bool qede_poll_is_more_work(struct qede_fastpath *fp) |
|
{ |
|
qed_sb_update_sb_idx(fp->sb_info); |
|
|
|
/* *_has_*_work() reads the status block, thus we need to ensure that |
|
* status block indices have been actually read (qed_sb_update_sb_idx) |
|
* prior to this check (*_has_*_work) so that we won't write the |
|
* "newer" value of the status block to HW (if there was a DMA right |
|
* after qede_has_rx_work and if there is no rmb, the memory reading |
|
* (qed_sb_update_sb_idx) may be postponed to right before *_ack_sb). |
|
* In this case there will never be another interrupt until there is |
|
* another update of the status block, while there is still unhandled |
|
* work. |
|
*/ |
|
rmb(); |
|
|
|
if (likely(fp->type & QEDE_FASTPATH_RX)) |
|
if (qede_has_rx_work(fp->rxq)) |
|
return true; |
|
|
|
if (fp->type & QEDE_FASTPATH_XDP) |
|
if (qede_txq_has_work(fp->xdp_tx)) |
|
return true; |
|
|
|
if (likely(fp->type & QEDE_FASTPATH_TX)) { |
|
int cos; |
|
|
|
for_each_cos_in_txq(fp->edev, cos) { |
|
if (qede_txq_has_work(&fp->txq[cos])) |
|
return true; |
|
} |
|
} |
|
|
|
return false; |
|
} |
|
|
|
/********************* |
|
* NDO & API related * |
|
*********************/ |
|
int qede_poll(struct napi_struct *napi, int budget) |
|
{ |
|
struct qede_fastpath *fp = container_of(napi, struct qede_fastpath, |
|
napi); |
|
struct qede_dev *edev = fp->edev; |
|
int rx_work_done = 0; |
|
u16 xdp_prod; |
|
|
|
fp->xdp_xmit = 0; |
|
|
|
if (likely(fp->type & QEDE_FASTPATH_TX)) { |
|
int cos; |
|
|
|
for_each_cos_in_txq(fp->edev, cos) { |
|
if (qede_txq_has_work(&fp->txq[cos])) |
|
qede_tx_int(edev, &fp->txq[cos]); |
|
} |
|
} |
|
|
|
if ((fp->type & QEDE_FASTPATH_XDP) && qede_txq_has_work(fp->xdp_tx)) |
|
qede_xdp_tx_int(edev, fp->xdp_tx); |
|
|
|
rx_work_done = (likely(fp->type & QEDE_FASTPATH_RX) && |
|
qede_has_rx_work(fp->rxq)) ? |
|
qede_rx_int(fp, budget) : 0; |
|
/* Handle case where we are called by netpoll with a budget of 0 */ |
|
if (rx_work_done < budget || !budget) { |
|
if (!qede_poll_is_more_work(fp)) { |
|
napi_complete_done(napi, rx_work_done); |
|
|
|
/* Update and reenable interrupts */ |
|
qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1); |
|
} else { |
|
rx_work_done = budget; |
|
} |
|
} |
|
|
|
if (fp->xdp_xmit & QEDE_XDP_TX) { |
|
xdp_prod = qed_chain_get_prod_idx(&fp->xdp_tx->tx_pbl); |
|
|
|
fp->xdp_tx->tx_db.data.bd_prod = cpu_to_le16(xdp_prod); |
|
qede_update_tx_producer(fp->xdp_tx); |
|
} |
|
|
|
if (fp->xdp_xmit & QEDE_XDP_REDIRECT) |
|
xdp_do_flush_map(); |
|
|
|
return rx_work_done; |
|
} |
|
|
|
irqreturn_t qede_msix_fp_int(int irq, void *fp_cookie) |
|
{ |
|
struct qede_fastpath *fp = fp_cookie; |
|
|
|
qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/); |
|
|
|
napi_schedule_irqoff(&fp->napi); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
/* Main transmit function */ |
|
netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
|
{ |
|
struct qede_dev *edev = netdev_priv(ndev); |
|
struct netdev_queue *netdev_txq; |
|
struct qede_tx_queue *txq; |
|
struct eth_tx_1st_bd *first_bd; |
|
struct eth_tx_2nd_bd *second_bd = NULL; |
|
struct eth_tx_3rd_bd *third_bd = NULL; |
|
struct eth_tx_bd *tx_data_bd = NULL; |
|
u16 txq_index, val = 0; |
|
u8 nbd = 0; |
|
dma_addr_t mapping; |
|
int rc, frag_idx = 0, ipv6_ext = 0; |
|
u8 xmit_type; |
|
u16 idx; |
|
u16 hlen; |
|
bool data_split = false; |
|
|
|
/* Get tx-queue context and netdev index */ |
|
txq_index = skb_get_queue_mapping(skb); |
|
WARN_ON(txq_index >= QEDE_TSS_COUNT(edev) * edev->dev_info.num_tc); |
|
txq = QEDE_NDEV_TXQ_ID_TO_TXQ(edev, txq_index); |
|
netdev_txq = netdev_get_tx_queue(ndev, txq_index); |
|
|
|
WARN_ON(qed_chain_get_elem_left(&txq->tx_pbl) < (MAX_SKB_FRAGS + 1)); |
|
|
|
xmit_type = qede_xmit_type(skb, &ipv6_ext); |
|
|
|
#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET) |
|
if (qede_pkt_req_lin(skb, xmit_type)) { |
|
if (skb_linearize(skb)) { |
|
txq->tx_mem_alloc_err++; |
|
|
|
dev_kfree_skb_any(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
} |
|
#endif |
|
|
|
/* Fill the entry in the SW ring and the BDs in the FW ring */ |
|
idx = txq->sw_tx_prod; |
|
txq->sw_tx_ring.skbs[idx].skb = skb; |
|
first_bd = (struct eth_tx_1st_bd *) |
|
qed_chain_produce(&txq->tx_pbl); |
|
memset(first_bd, 0, sizeof(*first_bd)); |
|
first_bd->data.bd_flags.bitfields = |
|
1 << ETH_TX_1ST_BD_FLAGS_START_BD_SHIFT; |
|
|
|
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) |
|
qede_ptp_tx_ts(edev, skb); |
|
|
|
/* Map skb linear data for DMA and set in the first BD */ |
|
mapping = dma_map_single(txq->dev, skb->data, |
|
skb_headlen(skb), DMA_TO_DEVICE); |
|
if (unlikely(dma_mapping_error(txq->dev, mapping))) { |
|
DP_NOTICE(edev, "SKB mapping failed\n"); |
|
qede_free_failed_tx_pkt(txq, first_bd, 0, false); |
|
qede_update_tx_producer(txq); |
|
return NETDEV_TX_OK; |
|
} |
|
nbd++; |
|
BD_SET_UNMAP_ADDR_LEN(first_bd, mapping, skb_headlen(skb)); |
|
|
|
/* In case there is IPv6 with extension headers or LSO we need 2nd and |
|
* 3rd BDs. |
|
*/ |
|
if (unlikely((xmit_type & XMIT_LSO) | ipv6_ext)) { |
|
second_bd = (struct eth_tx_2nd_bd *) |
|
qed_chain_produce(&txq->tx_pbl); |
|
memset(second_bd, 0, sizeof(*second_bd)); |
|
|
|
nbd++; |
|
third_bd = (struct eth_tx_3rd_bd *) |
|
qed_chain_produce(&txq->tx_pbl); |
|
memset(third_bd, 0, sizeof(*third_bd)); |
|
|
|
nbd++; |
|
/* We need to fill in additional data in second_bd... */ |
|
tx_data_bd = (struct eth_tx_bd *)second_bd; |
|
} |
|
|
|
if (skb_vlan_tag_present(skb)) { |
|
first_bd->data.vlan = cpu_to_le16(skb_vlan_tag_get(skb)); |
|
first_bd->data.bd_flags.bitfields |= |
|
1 << ETH_TX_1ST_BD_FLAGS_VLAN_INSERTION_SHIFT; |
|
} |
|
|
|
/* Fill the parsing flags & params according to the requested offload */ |
|
if (xmit_type & XMIT_L4_CSUM) { |
|
/* We don't re-calculate IP checksum as it is already done by |
|
* the upper stack |
|
*/ |
|
first_bd->data.bd_flags.bitfields |= |
|
1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT; |
|
|
|
if (xmit_type & XMIT_ENC) { |
|
first_bd->data.bd_flags.bitfields |= |
|
1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; |
|
|
|
val |= (1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT); |
|
} |
|
|
|
/* Legacy FW had flipped behavior in regard to this bit - |
|
* I.e., needed to set to prevent FW from touching encapsulated |
|
* packets when it didn't need to. |
|
*/ |
|
if (unlikely(txq->is_legacy)) |
|
val ^= (1 << ETH_TX_DATA_1ST_BD_TUNN_FLAG_SHIFT); |
|
|
|
/* If the packet is IPv6 with extension header, indicate that |
|
* to FW and pass few params, since the device cracker doesn't |
|
* support parsing IPv6 with extension header/s. |
|
*/ |
|
if (unlikely(ipv6_ext)) |
|
qede_set_params_for_ipv6_ext(skb, second_bd, third_bd); |
|
} |
|
|
|
if (xmit_type & XMIT_LSO) { |
|
first_bd->data.bd_flags.bitfields |= |
|
(1 << ETH_TX_1ST_BD_FLAGS_LSO_SHIFT); |
|
third_bd->data.lso_mss = |
|
cpu_to_le16(skb_shinfo(skb)->gso_size); |
|
|
|
if (unlikely(xmit_type & XMIT_ENC)) { |
|
first_bd->data.bd_flags.bitfields |= |
|
1 << ETH_TX_1ST_BD_FLAGS_TUNN_IP_CSUM_SHIFT; |
|
|
|
if (xmit_type & XMIT_ENC_GSO_L4_CSUM) { |
|
u8 tmp = ETH_TX_1ST_BD_FLAGS_TUNN_L4_CSUM_SHIFT; |
|
|
|
first_bd->data.bd_flags.bitfields |= 1 << tmp; |
|
} |
|
hlen = qede_get_skb_hlen(skb, true); |
|
} else { |
|
first_bd->data.bd_flags.bitfields |= |
|
1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT; |
|
hlen = qede_get_skb_hlen(skb, false); |
|
} |
|
|
|
/* @@@TBD - if will not be removed need to check */ |
|
third_bd->data.bitfields |= |
|
cpu_to_le16(1 << ETH_TX_DATA_3RD_BD_HDR_NBD_SHIFT); |
|
|
|
/* Make life easier for FW guys who can't deal with header and |
|
* data on same BD. If we need to split, use the second bd... |
|
*/ |
|
if (unlikely(skb_headlen(skb) > hlen)) { |
|
DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, |
|
"TSO split header size is %d (%x:%x)\n", |
|
first_bd->nbytes, first_bd->addr.hi, |
|
first_bd->addr.lo); |
|
|
|
mapping = HILO_U64(le32_to_cpu(first_bd->addr.hi), |
|
le32_to_cpu(first_bd->addr.lo)) + |
|
hlen; |
|
|
|
BD_SET_UNMAP_ADDR_LEN(tx_data_bd, mapping, |
|
le16_to_cpu(first_bd->nbytes) - |
|
hlen); |
|
|
|
/* this marks the BD as one that has no |
|
* individual mapping |
|
*/ |
|
txq->sw_tx_ring.skbs[idx].flags |= QEDE_TSO_SPLIT_BD; |
|
|
|
first_bd->nbytes = cpu_to_le16(hlen); |
|
|
|
tx_data_bd = (struct eth_tx_bd *)third_bd; |
|
data_split = true; |
|
} |
|
} else { |
|
val |= ((skb->len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) << |
|
ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT); |
|
} |
|
|
|
first_bd->data.bitfields = cpu_to_le16(val); |
|
|
|
/* Handle fragmented skb */ |
|
/* special handle for frags inside 2nd and 3rd bds.. */ |
|
while (tx_data_bd && frag_idx < skb_shinfo(skb)->nr_frags) { |
|
rc = map_frag_to_bd(txq, |
|
&skb_shinfo(skb)->frags[frag_idx], |
|
tx_data_bd); |
|
if (rc) { |
|
qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); |
|
qede_update_tx_producer(txq); |
|
return NETDEV_TX_OK; |
|
} |
|
|
|
if (tx_data_bd == (struct eth_tx_bd *)second_bd) |
|
tx_data_bd = (struct eth_tx_bd *)third_bd; |
|
else |
|
tx_data_bd = NULL; |
|
|
|
frag_idx++; |
|
} |
|
|
|
/* map last frags into 4th, 5th .... */ |
|
for (; frag_idx < skb_shinfo(skb)->nr_frags; frag_idx++, nbd++) { |
|
tx_data_bd = (struct eth_tx_bd *) |
|
qed_chain_produce(&txq->tx_pbl); |
|
|
|
memset(tx_data_bd, 0, sizeof(*tx_data_bd)); |
|
|
|
rc = map_frag_to_bd(txq, |
|
&skb_shinfo(skb)->frags[frag_idx], |
|
tx_data_bd); |
|
if (rc) { |
|
qede_free_failed_tx_pkt(txq, first_bd, nbd, data_split); |
|
qede_update_tx_producer(txq); |
|
return NETDEV_TX_OK; |
|
} |
|
} |
|
|
|
/* update the first BD with the actual num BDs */ |
|
first_bd->data.nbds = nbd; |
|
|
|
netdev_tx_sent_queue(netdev_txq, skb->len); |
|
|
|
skb_tx_timestamp(skb); |
|
|
|
/* Advance packet producer only before sending the packet since mapping |
|
* of pages may fail. |
|
*/ |
|
txq->sw_tx_prod = (txq->sw_tx_prod + 1) % txq->num_tx_buffers; |
|
|
|
/* 'next page' entries are counted in the producer value */ |
|
txq->tx_db.data.bd_prod = |
|
cpu_to_le16(qed_chain_get_prod_idx(&txq->tx_pbl)); |
|
|
|
if (!netdev_xmit_more() || netif_xmit_stopped(netdev_txq)) |
|
qede_update_tx_producer(txq); |
|
|
|
if (unlikely(qed_chain_get_elem_left(&txq->tx_pbl) |
|
< (MAX_SKB_FRAGS + 1))) { |
|
if (netdev_xmit_more()) |
|
qede_update_tx_producer(txq); |
|
|
|
netif_tx_stop_queue(netdev_txq); |
|
txq->stopped_cnt++; |
|
DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, |
|
"Stop queue was called\n"); |
|
/* paired memory barrier is in qede_tx_int(), we have to keep |
|
* ordering of set_bit() in netif_tx_stop_queue() and read of |
|
* fp->bd_tx_cons |
|
*/ |
|
smp_mb(); |
|
|
|
if ((qed_chain_get_elem_left(&txq->tx_pbl) >= |
|
(MAX_SKB_FRAGS + 1)) && |
|
(edev->state == QEDE_STATE_OPEN)) { |
|
netif_tx_wake_queue(netdev_txq); |
|
DP_VERBOSE(edev, NETIF_MSG_TX_QUEUED, |
|
"Wake queue was called\n"); |
|
} |
|
} |
|
|
|
return NETDEV_TX_OK; |
|
} |
|
|
|
u16 qede_select_queue(struct net_device *dev, struct sk_buff *skb, |
|
struct net_device *sb_dev) |
|
{ |
|
struct qede_dev *edev = netdev_priv(dev); |
|
int total_txq; |
|
|
|
total_txq = QEDE_TSS_COUNT(edev) * edev->dev_info.num_tc; |
|
|
|
return QEDE_TSS_COUNT(edev) ? |
|
netdev_pick_tx(dev, skb, NULL) % total_txq : 0; |
|
} |
|
|
|
/* 8B udp header + 8B base tunnel header + 32B option length */ |
|
#define QEDE_MAX_TUN_HDR_LEN 48 |
|
|
|
netdev_features_t qede_features_check(struct sk_buff *skb, |
|
struct net_device *dev, |
|
netdev_features_t features) |
|
{ |
|
if (skb->encapsulation) { |
|
u8 l4_proto = 0; |
|
|
|
switch (vlan_get_protocol(skb)) { |
|
case htons(ETH_P_IP): |
|
l4_proto = ip_hdr(skb)->protocol; |
|
break; |
|
case htons(ETH_P_IPV6): |
|
l4_proto = ipv6_hdr(skb)->nexthdr; |
|
break; |
|
default: |
|
return features; |
|
} |
|
|
|
/* Disable offloads for geneve tunnels, as HW can't parse |
|
* the geneve header which has option length greater than 32b |
|
* and disable offloads for the ports which are not offloaded. |
|
*/ |
|
if (l4_proto == IPPROTO_UDP) { |
|
struct qede_dev *edev = netdev_priv(dev); |
|
u16 hdrlen, vxln_port, gnv_port; |
|
|
|
hdrlen = QEDE_MAX_TUN_HDR_LEN; |
|
vxln_port = edev->vxlan_dst_port; |
|
gnv_port = edev->geneve_dst_port; |
|
|
|
if ((skb_inner_mac_header(skb) - |
|
skb_transport_header(skb)) > hdrlen || |
|
(ntohs(udp_hdr(skb)->dest) != vxln_port && |
|
ntohs(udp_hdr(skb)->dest) != gnv_port)) |
|
return features & ~(NETIF_F_CSUM_MASK | |
|
NETIF_F_GSO_MASK); |
|
} else if (l4_proto == IPPROTO_IPIP) { |
|
/* IPIP tunnels are unknown to the device or at least unsupported natively, |
|
* offloads for them can't be done trivially, so disable them for such skb. |
|
*/ |
|
return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
|
} |
|
} |
|
|
|
return features; |
|
}
|
|
|