Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ /* Copyright (C) 2015-2019 Netronome Systems, Inc. */ #ifndef _NFP_DP_NFD3_H_ #define _NFP_DP_NFD3_H_ struct sk_buff; struct net_device; /* TX descriptor format */ #define NFD3_DESC_TX_EOP BIT(7) #define NFD3_DESC_TX_OFFSET_MASK GENMASK(6, 0) #define NFD3_DESC_TX_MSS_MASK GENMASK(13, 0) /* Flags in the host TX descriptor */ #define NFD3_DESC_TX_CSUM BIT(7) #define NFD3_DESC_TX_IP4_CSUM BIT(6) #define NFD3_DESC_TX_TCP_CSUM BIT(5) #define NFD3_DESC_TX_UDP_CSUM BIT(4) #define NFD3_DESC_TX_VLAN BIT(3) #define NFD3_DESC_TX_LSO BIT(2) #define NFD3_DESC_TX_ENCAP BIT(1) #define NFD3_DESC_TX_O_IP4_CSUM BIT(0) struct nfp_nfd3_tx_desc { union { struct { u8 dma_addr_hi; /* High bits of host buf address */ __le16 dma_len; /* Length to DMA for this desc */ u8 offset_eop; /* Offset in buf where pkt starts + * highest bit is eop flag. */ __le32 dma_addr_lo; /* Low 32bit of host buf addr */ __le16 mss; /* MSS to be used for LSO */ u8 lso_hdrlen; /* LSO, TCP payload offset */ u8 flags; /* TX Flags, see @NFD3_DESC_TX_* */ union { struct { u8 l3_offset; /* L3 header offset */ u8 l4_offset; /* L4 header offset */ }; __le16 vlan; /* VLAN tag to add if indicated */ }; __le16 data_len; /* Length of frame + meta data */ } __packed; __le32 vals[4]; __le64 vals8[2]; }; }; /** * struct nfp_nfd3_tx_buf - software TX buffer descriptor * @skb: normal ring, sk_buff associated with this buffer * @frag: XDP ring, page frag associated with this buffer * @xdp: XSK buffer pool handle (for AF_XDP) * @dma_addr: DMA mapping address of the buffer * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) * @pkt_cnt: Number of packets to be produced out of the skb associated * with this buffer (valid only on the head's buffer). * Will be 1 for all non-TSO packets. * @is_xsk_tx: Flag if buffer is a RX buffer after a XDP_TX action and not a * buffer from the TX queue (for AF_XDP). * @real_len: Number of bytes which to be produced out of the skb (valid only * on the head's buffer). Equal to skb->len for non-TSO packets. */ struct nfp_nfd3_tx_buf { union { struct sk_buff *skb; void *frag; struct xdp_buff *xdp; }; dma_addr_t dma_addr; union { struct { short int fidx; u16 pkt_cnt; }; struct { bool is_xsk_tx; }; }; u32 real_len; }; void nfp_nfd3_rx_csum(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, const struct nfp_net_rx_desc *rxd, const struct nfp_meta_parsed *meta, struct sk_buff *skb); bool nfp_nfd3_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta, void *data, void *pkt, unsigned int pkt_len, int meta_len); void nfp_nfd3_tx_complete(struct nfp_net_tx_ring *tx_ring, int budget); int nfp_nfd3_poll(struct napi_struct *napi, int budget); netdev_tx_t nfp_nfd3_tx(struct sk_buff *skb, struct net_device *netdev); bool nfp_nfd3_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, struct sk_buff *skb, bool old); void nfp_nfd3_ctrl_poll(struct tasklet_struct *t); void nfp_nfd3_rx_ring_fill_freelist(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring); void nfp_nfd3_xsk_tx_free(struct nfp_nfd3_tx_buf *txbuf); int nfp_nfd3_xsk_poll(struct napi_struct *napi, int budget); #ifndef CONFIG_NFP_NET_IPSEC static inline void nfp_nfd3_ipsec_tx(struct nfp_nfd3_tx_desc *txd, struct sk_buff *skb) { } #else void nfp_nfd3_ipsec_tx(struct nfp_nfd3_tx_desc *txd, struct sk_buff *skb); #endif #endif |