summaryrefslogtreecommitdiffstats
path: root/drivers/net/sfc/sfc_tx.h
blob: 6c3ac3b619732d2cb250f6bede2c8889ce193436 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*-
 *   BSD LICENSE
 *
 * Copyright (c) 2016-2017 Solarflare Communications Inc.
 * All rights reserved.
 *
 * This software was jointly developed between OKTET Labs (under contract
 * for Solarflare) and Solarflare Communications, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _SFC_TX_H
#define _SFC_TX_H

#include <rte_mbuf.h>
#include <rte_ethdev.h>

#include "efx.h"

#include "sfc_dp_tx.h"

#ifdef __cplusplus
extern "C" {
#endif

struct sfc_adapter;
struct sfc_evq;

/**
 * Software Tx descriptor information associated with hardware Tx
 * descriptor.
 */
struct sfc_efx_tx_sw_desc {
	struct rte_mbuf		*mbuf;
	uint8_t			*tsoh;	/* Buffer to store TSO header */
};

enum sfc_txq_state_bit {
	SFC_TXQ_INITIALIZED_BIT = 0,
#define SFC_TXQ_INITIALIZED	(1 << SFC_TXQ_INITIALIZED_BIT)
	SFC_TXQ_STARTED_BIT,
#define SFC_TXQ_STARTED		(1 << SFC_TXQ_STARTED_BIT)
	SFC_TXQ_FLUSHING_BIT,
#define SFC_TXQ_FLUSHING	(1 << SFC_TXQ_FLUSHING_BIT)
	SFC_TXQ_FLUSHED_BIT,
#define SFC_TXQ_FLUSHED		(1 << SFC_TXQ_FLUSHED_BIT)
};

/**
 * Transmit queue control information. Not used on datapath.
 * Allocated on the socket specified on the queue setup.
 */
struct sfc_txq {
	unsigned int			state;
	unsigned int			hw_index;
	struct sfc_evq			*evq;
	efsys_mem_t			mem;
	struct sfc_dp_txq		*dp;
	efx_txq_t			*common;
	unsigned int			free_thresh;
	unsigned int			flags;
};

static inline unsigned int
sfc_txq_sw_index_by_hw_index(unsigned int hw_index)
{
	return hw_index;
}

static inline unsigned int
sfc_txq_sw_index(const struct sfc_txq *txq)
{
	return sfc_txq_sw_index_by_hw_index(txq->hw_index);
}

struct sfc_txq *sfc_txq_by_dp_txq(const struct sfc_dp_txq *dp_txq);

/**
 * Transmit queue information used on libefx-based data path.
 * Allocated on the socket specified on the queue setup.
 */
struct sfc_efx_txq {
	struct sfc_evq			*evq;
	struct sfc_efx_tx_sw_desc	*sw_ring;
	unsigned int			ptr_mask;
	efx_desc_t			*pend_desc;
	efx_txq_t			*common;
	unsigned int			added;
	unsigned int			pending;
	unsigned int			completed;
	unsigned int			free_thresh;
	uint16_t			hw_vlan_tci;
	uint16_t			dma_desc_size_max;

	unsigned int			hw_index;
	unsigned int			flags;
#define SFC_EFX_TXQ_FLAG_STARTED	0x1
#define SFC_EFX_TXQ_FLAG_RUNNING	0x2

	/* Datapath transmit queue anchor */
	struct sfc_dp_txq		dp;
};

static inline struct sfc_efx_txq *
sfc_efx_txq_by_dp_txq(struct sfc_dp_txq *dp_txq)
{
	return container_of(dp_txq, struct sfc_efx_txq, dp);
}

struct sfc_txq_info {
	unsigned int		entries;
	struct sfc_txq		*txq;
	boolean_t		deferred_start;
	boolean_t		deferred_started;
};

int sfc_tx_configure(struct sfc_adapter *sa);
void sfc_tx_close(struct sfc_adapter *sa);

int sfc_tx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
		 uint16_t nb_tx_desc, unsigned int socket_id,
		 const struct rte_eth_txconf *tx_conf);
void sfc_tx_qfini(struct sfc_adapter *sa, unsigned int sw_index);

void sfc_tx_qflush_done(struct sfc_txq *txq);
int sfc_tx_qstart(struct sfc_adapter *sa, unsigned int sw_index);
void sfc_tx_qstop(struct sfc_adapter *sa, unsigned int sw_index);
int sfc_tx_start(struct sfc_adapter *sa);
void sfc_tx_stop(struct sfc_adapter *sa);

/* From 'sfc_tso.c' */
int sfc_efx_tso_alloc_tsoh_objs(struct sfc_efx_tx_sw_desc *sw_ring,
				unsigned int txq_entries,
				unsigned int socket_id);
void sfc_efx_tso_free_tsoh_objs(struct sfc_efx_tx_sw_desc *sw_ring,
				unsigned int txq_entries);
int sfc_efx_tso_do(struct sfc_efx_txq *txq, unsigned int idx,
		   struct rte_mbuf **in_seg, size_t *in_off, efx_desc_t **pend,
		   unsigned int *pkt_descs, size_t *pkt_len);

#ifdef __cplusplus
}
#endif
#endif	/* _SFC_TX_H */