drivers/net/ethernet/sfc/tx_common.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /****************************************************************************
   3  * Driver for Solarflare network controllers and boards
   4  * Copyright 2018 Solarflare Communications Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation, incorporated herein by reference.
   9  */
  10
  11 #ifndef EFX_TX_COMMON_H
  12 #define EFX_TX_COMMON_H
  13
  14 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
  15 void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
  16 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
  17 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
  18
  19 void efx_dequeue_buffer(struct efx_tx_queue *tx_queue,
  20                         struct efx_tx_buffer *buffer,
  21                         unsigned int *pkts_compl,
  22                         unsigned int *bytes_compl,
  23                         unsigned int *efv_pkts_compl,
  24                         unsigned int *xdp_pkts,
  25                         unsigned int *xdp_bytes);
  26
  27 static inline bool efx_tx_buffer_in_use(struct efx_tx_buffer *buffer)
  28 {
  29         return buffer->len || (buffer->flags & EFX_TX_BUF_OPTION);
  30 }
  31
  32 void efx_xmit_done_check_empty(struct efx_tx_queue *tx_queue);
  33 int efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
  34
  35 void efx_enqueue_unwind(struct efx_tx_queue *tx_queue,
  36                         unsigned int insert_count);
  37
  38 struct efx_tx_buffer *efx_tx_map_chunk(struct efx_tx_queue *tx_queue,
  39                                        dma_addr_t dma_addr, size_t len);
  40 int efx_tx_tso_header_length(struct sk_buff *skb);
  41 int efx_tx_map_data(struct efx_tx_queue *tx_queue, struct sk_buff *skb,
  42                     unsigned int segment_count);
  43
  44 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
  45 int efx_tx_tso_fallback(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
  46
  47 extern bool efx_separate_tx_channels;
  48 #endif