/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (c) Meta Platforms, Inc. and affiliates. */ #ifndef _FBNIC_TXRX_H_ #define _FBNIC_TXRX_H_ #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/types.h> #include <linux/u64_stats_sync.h> #include <net/xdp.h> struct fbnic_net; /* Guarantee we have space needed for storing the buffer * To store the buffer we need: * 1 descriptor per page * + 1 descriptor for skb head * + 2 descriptors for metadata and optional metadata * + 7 descriptors to keep tail out of the same cacheline as head * If we cannot guarantee that then we should return TX_BUSY */ #define FBNIC_MAX_SKB_DESC … #define FBNIC_TX_DESC_WAKEUP … #define FBNIC_TX_DESC_MIN … #define FBNIC_MAX_TXQS … #define FBNIC_MAX_RXQS … #define FBNIC_TXQ_SIZE_DEFAULT … #define FBNIC_HPQ_SIZE_DEFAULT … #define FBNIC_PPQ_SIZE_DEFAULT … #define FBNIC_RCQ_SIZE_DEFAULT … #define FBNIC_RX_TROOM … #define FBNIC_RX_HROOM … #define FBNIC_RX_PAD … #define FBNIC_RX_MAX_HDR … #define FBNIC_RX_PAYLD_OFFSET … #define FBNIC_RX_PAYLD_PG_CL … #define FBNIC_RING_F_DISABLED … #define FBNIC_RING_F_CTX … #define FBNIC_RING_F_STATS … struct fbnic_pkt_buff { … }; struct fbnic_queue_stats { … }; /* Pagecnt bias is long max to reserve the last bit to catch overflow * cases where if we overcharge the bias it will flip over to be negative. */ #define PAGECNT_BIAS_MAX … struct fbnic_rx_buf { … }; struct fbnic_ring { … }; struct fbnic_q_triad { … }; struct fbnic_napi_vector { … }; #define FBNIC_MAX_TXQS … #define FBNIC_MAX_RXQS … netdev_tx_t fbnic_xmit_frame(struct sk_buff *skb, struct net_device *dev); netdev_features_t fbnic_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features); int fbnic_alloc_napi_vectors(struct fbnic_net *fbn); void fbnic_free_napi_vectors(struct fbnic_net *fbn); int fbnic_alloc_resources(struct fbnic_net *fbn); void fbnic_free_resources(struct fbnic_net *fbn); void fbnic_napi_enable(struct fbnic_net *fbn); void fbnic_napi_disable(struct fbnic_net *fbn); void fbnic_enable(struct fbnic_net *fbn); void fbnic_disable(struct fbnic_net *fbn); void fbnic_flush(struct fbnic_net *fbn); void fbnic_fill(struct fbnic_net *fbn); void fbnic_napi_depletion_check(struct net_device *netdev); int fbnic_wait_all_queues_idle(struct fbnic_dev *fbd, bool may_fail); #endif /* _FBNIC_TXRX_H_ */
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