linux/drivers/net/ethernet/intel/ice/ice_txrx_lib.h

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2019, Intel Corporation. */

#ifndef _ICE_TXRX_LIB_H_
#define _ICE_TXRX_LIB_H_
#include "ice.h"

/**
 * ice_set_rx_bufs_act - propagate Rx buffer action to frags
 * @xdp: XDP buffer representing frame (linear and frags part)
 * @rx_ring: Rx ring struct
 * act: action to store onto Rx buffers related to XDP buffer parts
 *
 * Set action that should be taken before putting Rx buffer from first frag
 * to the last.
 */
static inline void
ice_set_rx_bufs_act(struct xdp_buff *xdp, const struct ice_rx_ring *rx_ring,
		    const unsigned int act)
{ … }

/**
 * ice_test_staterr - tests bits in Rx descriptor status and error fields
 * @status_err_n: Rx descriptor status_error0 or status_error1 bits
 * @stat_err_bits: value to mask
 *
 * This function does some fast chicanery in order to return the
 * value of the mask which is really only used for boolean tests.
 * The status_error_len doesn't need to be shifted because it begins
 * at offset zero.
 */
static inline bool
ice_test_staterr(__le16 status_err_n, const u16 stat_err_bits)
{ … }

/**
 * ice_is_non_eop - process handling of non-EOP buffers
 * @rx_ring: Rx ring being processed
 * @rx_desc: Rx descriptor for current buffer
 *
 * If the buffer is an EOP buffer, this function exits returning false,
 * otherwise return true indicating that this is in fact a non-EOP buffer.
 */
static inline bool
ice_is_non_eop(const struct ice_rx_ring *rx_ring,
	       const union ice_32b_rx_flex_desc *rx_desc)
{ … }

static inline __le64
ice_build_ctob(u64 td_cmd, u64 td_offset, unsigned int size, u64 td_tag)
{ … }

/**
 * ice_get_vlan_tci - get VLAN TCI from Rx flex descriptor
 * @rx_desc: Rx 32b flex descriptor with RXDID=2
 *
 * The OS and current PF implementation only support stripping a single VLAN tag
 * at a time, so there should only ever be 0 or 1 tags in the l2tag* fields. If
 * one is found return the tag, else return 0 to mean no VLAN tag was found.
 */
static inline u16
ice_get_vlan_tci(const union ice_32b_rx_flex_desc *rx_desc)
{ … }

/**
 * ice_xdp_ring_update_tail - Updates the XDP Tx ring tail register
 * @xdp_ring: XDP Tx ring
 *
 * This function updates the XDP Tx ring tail register.
 */
static inline void ice_xdp_ring_update_tail(struct ice_tx_ring *xdp_ring)
{ … }

/**
 * ice_set_rs_bit - set RS bit on last produced descriptor (one behind current NTU)
 * @xdp_ring: XDP ring to produce the HW Tx descriptors on
 *
 * returns index of descriptor that had RS bit produced on
 */
static inline u32 ice_set_rs_bit(const struct ice_tx_ring *xdp_ring)
{ … }

void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res, u32 first_idx);
int ice_xmit_xdp_buff(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring);
int __ice_xmit_xdp_ring(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring,
			bool frame);
void ice_release_rx_desc(struct ice_rx_ring *rx_ring, u16 val);
void
ice_process_skb_fields(struct ice_rx_ring *rx_ring,
		       union ice_32b_rx_flex_desc *rx_desc,
		       struct sk_buff *skb);
void
ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tci);

static inline void
ice_xdp_meta_set_desc(struct xdp_buff *xdp,
		      union ice_32b_rx_flex_desc *eop_desc)
{ … }
#endif /* !_ICE_TXRX_LIB_H_ */