ethernet/sfc/tx_common.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /****************************************************************************
0003  * Driver for Solarflare network controllers and boards
0004  * Copyright 2018 Solarflare Communications Inc.
0005  *
0006  * This program is free software; you can redistribute it and/or modify it
0007  * under the terms of the GNU General Public License version 2 as published
0008  * by the Free Software Foundation, incorporated herein by reference.
0009  */
0010
0011 #ifndef EFX_TX_COMMON_H
0012 #define EFX_TX_COMMON_H
0013
0014 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue);
0015 void efx_init_tx_queue(struct efx_tx_queue *tx_queue);
0016 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue);
0017 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue);
0018
0019 void efx_dequeue_buffer(struct efx_tx_queue *tx_queue,
0020             struct efx_tx_buffer *buffer,
0021             unsigned int *pkts_compl,
0022             unsigned int *bytes_compl,
0023             unsigned int *efv_pkts_compl);
0024
0025 static inline bool efx_tx_buffer_in_use(struct efx_tx_buffer *buffer)
0026 {
0027     return buffer->len || (buffer->flags & EFX_TX_BUF_OPTION);
0028 }
0029
0030 void efx_xmit_done_check_empty(struct efx_tx_queue *tx_queue);
0031 void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index);
0032
0033 void efx_enqueue_unwind(struct efx_tx_queue *tx_queue,
0034             unsigned int insert_count);
0035
0036 struct efx_tx_buffer *efx_tx_map_chunk(struct efx_tx_queue *tx_queue,
0037                        dma_addr_t dma_addr, size_t len);
0038 int efx_tx_tso_header_length(struct sk_buff *skb);
0039 int efx_tx_map_data(struct efx_tx_queue *tx_queue, struct sk_buff *skb,
0040             unsigned int segment_count);
0041
0042 unsigned int efx_tx_max_skb_descs(struct efx_nic *efx);
0043 int efx_tx_tso_fallback(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
0044
0045 extern bool efx_separate_tx_channels;
0046 #endif