1/* SPDX-License-Identifier: GPL-2.0 */
 2/* Copyright (c) 2019, Intel Corporation. */
 3
 4#ifndef _ICE_TXRX_LIB_H_
 5#define _ICE_TXRX_LIB_H_
 6#include "ice.h"
 7
 8/**
 9 * ice_test_staterr - tests bits in Rx descriptor status and error fields
10 * @status_err_n: Rx descriptor status_error0 or status_error1 bits
11 * @stat_err_bits: value to mask
12 *
13 * This function does some fast chicanery in order to return the
14 * value of the mask which is really only used for boolean tests.
15 * The status_error_len doesn't need to be shifted because it begins
16 * at offset zero.
17 */
18static inline bool
19ice_test_staterr(__le16 status_err_n, const u16 stat_err_bits)
20{
21	return !!(status_err_n & cpu_to_le16(stat_err_bits));
22}
23
24static inline __le64
25ice_build_ctob(u64 td_cmd, u64 td_offset, unsigned int size, u64 td_tag)
26{
27	return cpu_to_le64(ICE_TX_DESC_DTYPE_DATA |
28			   (td_cmd    << ICE_TXD_QW1_CMD_S) |
29			   (td_offset << ICE_TXD_QW1_OFFSET_S) |
30			   ((u64)size << ICE_TXD_QW1_TX_BUF_SZ_S) |
31			   (td_tag    << ICE_TXD_QW1_L2TAG1_S));
32}
33
34/**
35 * ice_get_vlan_tag_from_rx_desc - get VLAN from Rx flex descriptor
36 * @rx_desc: Rx 32b flex descriptor with RXDID=2
37 *
38 * The OS and current PF implementation only support stripping a single VLAN tag
39 * at a time, so there should only ever be 0 or 1 tags in the l2tag* fields. If
40 * one is found return the tag, else return 0 to mean no VLAN tag was found.
41 */
42static inline u16
43ice_get_vlan_tag_from_rx_desc(union ice_32b_rx_flex_desc *rx_desc)
44{
45	u16 stat_err_bits;
46
47	stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_L2TAG1P_S);
48	if (ice_test_staterr(rx_desc->wb.status_error0, stat_err_bits))
49		return le16_to_cpu(rx_desc->wb.l2tag1);
50
51	stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS1_L2TAG2P_S);
52	if (ice_test_staterr(rx_desc->wb.status_error1, stat_err_bits))
53		return le16_to_cpu(rx_desc->wb.l2tag2_2nd);
54
55	return 0;
56}
57
58/**
59 * ice_xdp_ring_update_tail - Updates the XDP Tx ring tail register
60 * @xdp_ring: XDP Tx ring
61 *
62 * This function updates the XDP Tx ring tail register.
63 */
64static inline void ice_xdp_ring_update_tail(struct ice_tx_ring *xdp_ring)
65{
66	/* Force memory writes to complete before letting h/w
67	 * know there are new descriptors to fetch.
68	 */
69	wmb();
70	writel_relaxed(xdp_ring->next_to_use, xdp_ring->tail);
71}
72
73void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res);
74int ice_xmit_xdp_buff(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring);
75int ice_xmit_xdp_ring(void *data, u16 size, struct ice_tx_ring *xdp_ring);
76void ice_release_rx_desc(struct ice_rx_ring *rx_ring, u16 val);
77void
78ice_process_skb_fields(struct ice_rx_ring *rx_ring,
79		       union ice_32b_rx_flex_desc *rx_desc,
80		       struct sk_buff *skb, u16 ptype);
81void
82ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tag);
83#endif /* !_ICE_TXRX_LIB_H_ */