diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h b/drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h new file mode 100644 index 000000000..7a0df9e6c --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfd3/nfd3.h @@ -0,0 +1,106 @@ +/* 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); + +#endif |