/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */ #ifndef _FUNETH_TXRX_H #define _FUNETH_TXRX_H #include <linux/netdevice.h> #include <linux/u64_stats_sync.h> #include <net/xdp.h> /* Tx descriptor size */ #define FUNETH_SQE_SIZE … /* Size of device headers per Tx packet */ #define FUNETH_FUNOS_HDR_SZ … /* Number of gather list entries per Tx descriptor */ #define FUNETH_GLE_PER_DESC … /* Max gather list size in bytes for an sk_buff. */ #define FUNETH_MAX_GL_SZ … #if IS_ENABLED(CONFIG_TLS_DEVICE) #define FUNETH_TLS_SZ … #else #define FUNETH_TLS_SZ … #endif /* Max number of Tx descriptors for an sk_buff using a gather list. */ #define FUNETH_MAX_GL_DESC … /* Max number of Tx descriptors for any packet. */ #define FUNETH_MAX_PKT_DESC … /* Rx CQ descriptor size. */ #define FUNETH_CQE_SIZE … /* Offset of cqe_info within a CQE. */ #define FUNETH_CQE_INFO_OFFSET … /* Construct the IRQ portion of a CQ doorbell. The resulting value arms the * interrupt with the supplied time delay and packet count moderation settings. */ #define FUN_IRQ_CQ_DB(usec, pkts) … /* As above for SQ doorbells. */ #define FUN_IRQ_SQ_DB(usec, pkts) … /* Per packet tailroom. Present only for 1-frag packets. */ #define FUN_RX_TAILROOM … /* Per packet headroom for XDP. Preferred over XDP_PACKET_HEADROOM to * accommodate two packets per buffer for 4K pages and 1500B MTUs. */ #define FUN_XDP_HEADROOM … /* Initialization state of a queue. */ enum { … }; /* Initialization state of an interrupt. */ enum { … }; struct bpf_prog; struct funeth_txq_stats { … }; struct funeth_tx_info { … }; struct funeth_txq { … }; struct funeth_rxq_stats { … }; struct funeth_rxbuf { … }; struct funeth_rx_cache { … }; /* An Rx queue consists of a CQ and an SQ used to provide Rx buffers. */ struct funeth_rxq { … }; #define FUN_QSTAT_INC(q, counter) … #define FUN_QSTAT_READ(q, seq, stats_copy) … #define FUN_INT_NAME_LEN … struct fun_irq { … } ____cacheline_internodealigned_in_smp; /* Return the start address of the idx-th Tx descriptor. */ static inline void *fun_tx_desc_addr(const struct funeth_txq *q, unsigned int idx) { … } static inline void fun_txq_wr_db(const struct funeth_txq *q) { … } static inline int fun_irq_node(const struct fun_irq *p) { … } int fun_rxq_napi_poll(struct napi_struct *napi, int budget); int fun_txq_napi_poll(struct napi_struct *napi, int budget); netdev_tx_t fun_start_xmit(struct sk_buff *skb, struct net_device *netdev); bool fun_xdp_tx(struct funeth_txq *q, struct xdp_frame *xdpf); int fun_xdp_xmit_frames(struct net_device *dev, int n, struct xdp_frame **frames, u32 flags); int funeth_txq_create(struct net_device *dev, unsigned int qidx, unsigned int ndesc, struct fun_irq *irq, int state, struct funeth_txq **qp); int fun_txq_create_dev(struct funeth_txq *q, struct fun_irq *irq); struct funeth_txq *funeth_txq_free(struct funeth_txq *q, int state); int funeth_rxq_create(struct net_device *dev, unsigned int qidx, unsigned int ncqe, unsigned int nrqe, struct fun_irq *irq, int state, struct funeth_rxq **qp); int fun_rxq_create_dev(struct funeth_rxq *q, struct fun_irq *irq); struct funeth_rxq *funeth_rxq_free(struct funeth_rxq *q, int state); int fun_rxq_set_bpf(struct funeth_rxq *q, struct bpf_prog *prog); #endif /* _FUNETH_TXRX_H */
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