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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2016-2018 Solarflare Communications Inc.
* All rights reserved.
*
* This software was jointly developed between OKTET Labs (under contract
* for Solarflare) and Solarflare Communications, Inc.
*/
#ifndef _SFC_DP_TX_H
#define _SFC_DP_TX_H
#include <rte_ethdev_driver.h>
#include "sfc_dp.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Generic transmit queue information used on data path.
* It must be kept as small as it is possible since it is built into
* the structure used on datapath.
*/
struct sfc_dp_txq {
struct sfc_dp_queue dpq;
};
/**
* Datapath transmit queue creation information.
*
* The structure is used just to pass information from control path to
* datapath. It could be just function arguments, but it would be hardly
* readable.
*/
struct sfc_dp_tx_qcreate_info {
/** Maximum number of pushed Tx descriptors */
unsigned int max_fill_level;
/** Minimum number of unused Tx descriptors to do reap */
unsigned int free_thresh;
/** Transmit queue configuration flags */
unsigned int flags;
/** Offloads enabled on the transmit queue */
uint64_t offloads;
/** Tx queue size */
unsigned int txq_entries;
/** Maximum size of data in the DMA descriptor */
uint16_t dma_desc_size_max;
/** DMA-mapped Tx descriptors ring */
void *txq_hw_ring;
/** Associated event queue size */
unsigned int evq_entries;
/** Hardware event ring */
void *evq_hw_ring;
/** The queue index in hardware (required to push right doorbell) */
unsigned int hw_index;
/** Virtual address of the memory-mapped BAR to push Tx doorbell */
volatile void *mem_bar;
};
/**
* Get Tx datapath specific device info.
*
* @param dev_info Device info to be adjusted
*/
typedef void (sfc_dp_tx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
/**
* Get size of transmit and event queue rings by the number of Tx
* descriptors.
*
* @param nb_tx_desc Number of Tx descriptors
* @param txq_entries Location for number of Tx ring entries
* @param evq_entries Location for number of event ring entries
* @param txq_max_fill_level Location for maximum Tx ring fill level
*
* @return 0 or positive errno.
*/
typedef int (sfc_dp_tx_qsize_up_rings_t)(uint16_t nb_tx_desc,
unsigned int *txq_entries,
unsigned int *evq_entries,
unsigned int *txq_max_fill_level);
/**
* Allocate and initialize datapath transmit queue.
*
* @param port_id The port identifier
* @param queue_id The queue identifier
* @param pci_addr PCI function address
* @param socket_id Socket identifier to allocate memory
* @param info Tx queue details wrapped in structure
* @param dp_txqp Location for generic datapath transmit queue pointer
*
* @return 0 or positive errno.
*/
typedef int (sfc_dp_tx_qcreate_t)(uint16_t port_id, uint16_t queue_id,
const struct rte_pci_addr *pci_addr,
int socket_id,
const struct sfc_dp_tx_qcreate_info *info,
struct sfc_dp_txq **dp_txqp);
/**
* Free resources allocated for datapath transmit queue.
*/
typedef void (sfc_dp_tx_qdestroy_t)(struct sfc_dp_txq *dp_txq);
/**
* Transmit queue start callback.
*
* It handovers EvQ to the datapath.
*/
typedef int (sfc_dp_tx_qstart_t)(struct sfc_dp_txq *dp_txq,
unsigned int evq_read_ptr,
unsigned int txq_desc_index);
/**
* Transmit queue stop function called before the queue flush.
*
* It returns EvQ to the control path.
*/
typedef void (sfc_dp_tx_qstop_t)(struct sfc_dp_txq *dp_txq,
unsigned int *evq_read_ptr);
/**
* Transmit event handler used during queue flush only.
*/
typedef bool (sfc_dp_tx_qtx_ev_t)(struct sfc_dp_txq *dp_txq, unsigned int id);
/**
* Transmit queue function called after the queue flush.
*/
typedef void (sfc_dp_tx_qreap_t)(struct sfc_dp_txq *dp_txq);
/**
* Check Tx descriptor status
*/
typedef int (sfc_dp_tx_qdesc_status_t)(struct sfc_dp_txq *dp_txq,
uint16_t offset);
/** Transmit datapath definition */
struct sfc_dp_tx {
struct sfc_dp dp;
unsigned int features;
#define SFC_DP_TX_FEAT_VLAN_INSERT 0x1
#define SFC_DP_TX_FEAT_TSO 0x2
#define SFC_DP_TX_FEAT_MULTI_SEG 0x4
#define SFC_DP_TX_FEAT_MULTI_PROCESS 0x8
#define SFC_DP_TX_FEAT_MULTI_POOL 0x10
#define SFC_DP_TX_FEAT_REFCNT 0x20
sfc_dp_tx_get_dev_info_t *get_dev_info;
sfc_dp_tx_qsize_up_rings_t *qsize_up_rings;
sfc_dp_tx_qcreate_t *qcreate;
sfc_dp_tx_qdestroy_t *qdestroy;
sfc_dp_tx_qstart_t *qstart;
sfc_dp_tx_qstop_t *qstop;
sfc_dp_tx_qtx_ev_t *qtx_ev;
sfc_dp_tx_qreap_t *qreap;
sfc_dp_tx_qdesc_status_t *qdesc_status;
eth_tx_burst_t pkt_burst;
};
static inline struct sfc_dp_tx *
sfc_dp_find_tx_by_name(struct sfc_dp_list *head, const char *name)
{
struct sfc_dp *p = sfc_dp_find_by_name(head, SFC_DP_TX, name);
return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
}
static inline struct sfc_dp_tx *
sfc_dp_find_tx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
{
struct sfc_dp *p = sfc_dp_find_by_caps(head, SFC_DP_TX, avail_caps);
return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
}
extern struct sfc_dp_tx sfc_efx_tx;
extern struct sfc_dp_tx sfc_ef10_tx;
extern struct sfc_dp_tx sfc_ef10_simple_tx;
#ifdef __cplusplus
}
#endif
#endif /* _SFC_DP_TX_H */
|
