1/* SPDX-License-Identifier: GPL-2.0 */
  2/* Copyright(c) 2018 Intel Corporation. */
  3
  4#ifndef I40E_TXRX_COMMON_
  5#define I40E_TXRX_COMMON_
  6
  7#include "i40e.h"
  8
  9int i40e_xmit_xdp_tx_ring(struct xdp_buff *xdp, struct i40e_ring *xdp_ring);
 10void i40e_clean_programming_status(struct i40e_ring *rx_ring, u64 qword0_raw,
 11				   u64 qword1);
 12void i40e_process_skb_fields(struct i40e_ring *rx_ring,
 13			     union i40e_rx_desc *rx_desc, struct sk_buff *skb);
 14void i40e_xdp_ring_update_tail(struct i40e_ring *xdp_ring);
 15void i40e_update_rx_stats(struct i40e_ring *rx_ring,
 16			  unsigned int total_rx_bytes,
 17			  unsigned int total_rx_packets);
 18void i40e_finalize_xdp_rx(struct i40e_ring *rx_ring, unsigned int xdp_res);
 19void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val);
 20
 21#define I40E_XDP_PASS		0
 22#define I40E_XDP_CONSUMED	BIT(0)
 23#define I40E_XDP_TX		BIT(1)
 24#define I40E_XDP_REDIR		BIT(2)
 25#define I40E_XDP_EXIT		BIT(3)
 26
 27/*
 28 * build_ctob - Builds the Tx descriptor (cmd, offset and type) qword
 29 */
 30static inline __le64 build_ctob(u32 td_cmd, u32 td_offset, unsigned int size,
 31				u32 td_tag)
 32{
 33	return cpu_to_le64(I40E_TX_DESC_DTYPE_DATA |
 34			   ((u64)td_cmd  << I40E_TXD_QW1_CMD_SHIFT) |
 35			   ((u64)td_offset << I40E_TXD_QW1_OFFSET_SHIFT) |
 36			   ((u64)size  << I40E_TXD_QW1_TX_BUF_SZ_SHIFT) |
 37			   ((u64)td_tag  << I40E_TXD_QW1_L2TAG1_SHIFT));
 38}
 39
 40/**
 41 * i40e_update_tx_stats - Update the egress statistics for the Tx ring
 42 * @tx_ring: Tx ring to update
 43 * @total_packets: total packets sent
 44 * @total_bytes: total bytes sent
 45 **/
 46static inline void i40e_update_tx_stats(struct i40e_ring *tx_ring,
 47					unsigned int total_packets,
 48					unsigned int total_bytes)
 49{
 50	u64_stats_update_begin(&tx_ring->syncp);
 51	tx_ring->stats.bytes += total_bytes;
 52	tx_ring->stats.packets += total_packets;
 53	u64_stats_update_end(&tx_ring->syncp);
 54	tx_ring->q_vector->tx.total_bytes += total_bytes;
 55	tx_ring->q_vector->tx.total_packets += total_packets;
 56}
 57
 58#define WB_STRIDE 4
 59
 60/**
 61 * i40e_arm_wb - (Possibly) arms Tx write-back
 62 * @tx_ring: Tx ring to update
 63 * @vsi: the VSI
 64 * @budget: the NAPI budget left
 65 **/
 66static inline void i40e_arm_wb(struct i40e_ring *tx_ring,
 67			       struct i40e_vsi *vsi,
 68			       int budget)
 69{
 70	if (tx_ring->flags & I40E_TXR_FLAGS_WB_ON_ITR) {
 71		/* check to see if there are < 4 descriptors
 72		 * waiting to be written back, then kick the hardware to force
 73		 * them to be written back in case we stay in NAPI.
 74		 * In this mode on X722 we do not enable Interrupt.
 75		 */
 76		unsigned int j = i40e_get_tx_pending(tx_ring, false);
 77
 78		if (budget &&
 79		    ((j / WB_STRIDE) == 0) && j > 0 &&
 80		    !test_bit(__I40E_VSI_DOWN, vsi->state) &&
 81		    (I40E_DESC_UNUSED(tx_ring) != tx_ring->count))
 82			tx_ring->arm_wb = true;
 83	}
 84}
 85
 86/**
 87 * i40e_rx_is_programming_status - check for programming status descriptor
 88 * @qword1: qword1 representing status_error_len in CPU ordering
 89 *
 90 * The value of in the descriptor length field indicate if this
 91 * is a programming status descriptor for flow director or FCoE
 92 * by the value of I40E_RX_PROG_STATUS_DESC_LENGTH, otherwise
 93 * it is a packet descriptor.
 94 **/
 95static inline bool i40e_rx_is_programming_status(u64 qword1)
 96{
 97	/* The Rx filter programming status and SPH bit occupy the same
 98	 * spot in the descriptor. Since we don't support packet split we
 99	 * can just reuse the bit as an indication that this is a
100	 * programming status descriptor.
101	 */
102	return qword1 & I40E_RXD_QW1_LENGTH_SPH_MASK;
103}
104
105void i40e_xsk_clean_rx_ring(struct i40e_ring *rx_ring);
106void i40e_xsk_clean_tx_ring(struct i40e_ring *tx_ring);
107bool i40e_xsk_any_rx_ring_enabled(struct i40e_vsi *vsi);
108
109#endif /* I40E_TXRX_COMMON_ */