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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2017-2018 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_RX_H
#define _SFC_DP_RX_H
#include <rte_mempool.h>
#include <rte_ethdev_driver.h>
#include "sfc_dp.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Generic receive 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_rxq {
struct sfc_dp_queue dpq;
};
/**
* Datapath receive 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_rx_qcreate_info {
/** Memory pool to allocate Rx buffer from */
struct rte_mempool *refill_mb_pool;
/** Maximum number of pushed Rx descriptors in the queue */
unsigned int max_fill_level;
/** Minimum number of unused Rx descriptors to do refill */
unsigned int refill_threshold;
/**
* Usable mbuf data space in accordance with alignment and
* padding requirements imposed by HW.
*/
unsigned int buf_size;
/**
* Maximum number of Rx descriptors completed in one Rx event.
* Just for sanity checks if datapath would like to do.
*/
unsigned int batch_max;
/** Pseudo-header size */
unsigned int prefix_size;
/** Receive queue flags initializer */
unsigned int flags;
#define SFC_RXQ_FLAG_RSS_HASH 0x1
/** Rx queue size */
unsigned int rxq_entries;
/** DMA-mapped Rx descriptors ring */
void *rxq_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 Rx refill
* doorbell
*/
volatile void *mem_bar;
/** VI window size shift */
unsigned int vi_window_shift;
};
/**
* Get Rx datapath specific device info.
*
* @param dev_info Device info to be adjusted
*/
typedef void (sfc_dp_rx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
/**
* Test if an Rx datapath supports specific mempool ops.
*
* @param pool The name of the pool operations to test.
*
* @return Check status.
* @retval 0 Best mempool ops choice.
* @retval 1 Mempool ops are supported.
* @retval -ENOTSUP Mempool ops not supported.
*/
typedef int (sfc_dp_rx_pool_ops_supported_t)(const char *pool);
/**
* Get size of receive and event queue rings by the number of Rx
* descriptors and mempool configuration.
*
* @param nb_rx_desc Number of Rx descriptors
* @param mb_pool mbuf pool with Rx buffers
* @param rxq_entries Location for number of Rx ring entries
* @param evq_entries Location for number of event ring entries
* @param rxq_max_fill_level Location for maximum Rx ring fill level
*
* @return 0 or positive errno.
*/
typedef int (sfc_dp_rx_qsize_up_rings_t)(uint16_t nb_rx_desc,
struct rte_mempool *mb_pool,
unsigned int *rxq_entries,
unsigned int *evq_entries,
unsigned int *rxq_max_fill_level);
/**
* Allocate and initialize datapath receive 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 Receive queue information
* @param dp_rxqp Location for generic datapath receive queue pointer
*
* @return 0 or positive errno.
*/
typedef int (sfc_dp_rx_qcreate_t)(uint16_t port_id, uint16_t queue_id,
const struct rte_pci_addr *pci_addr,
int socket_id,
const struct sfc_dp_rx_qcreate_info *info,
struct sfc_dp_rxq **dp_rxqp);
/**
* Free resources allocated for datapath recevie queue.
*/
typedef void (sfc_dp_rx_qdestroy_t)(struct sfc_dp_rxq *dp_rxq);
/**
* Receive queue start callback.
*
* It handovers EvQ to the datapath.
*/
typedef int (sfc_dp_rx_qstart_t)(struct sfc_dp_rxq *dp_rxq,
unsigned int evq_read_ptr);
/**
* Receive queue stop function called before flush.
*/
typedef void (sfc_dp_rx_qstop_t)(struct sfc_dp_rxq *dp_rxq,
unsigned int *evq_read_ptr);
/**
* Receive event handler used during queue flush only.
*/
typedef bool (sfc_dp_rx_qrx_ev_t)(struct sfc_dp_rxq *dp_rxq, unsigned int id);
/**
* Packed stream receive event handler used during queue flush only.
*/
typedef bool (sfc_dp_rx_qrx_ps_ev_t)(struct sfc_dp_rxq *dp_rxq,
unsigned int id);
/**
* Receive queue purge function called after queue flush.
*
* Should be used to free unused recevie buffers.
*/
typedef void (sfc_dp_rx_qpurge_t)(struct sfc_dp_rxq *dp_rxq);
/** Get packet types recognized/classified */
typedef const uint32_t * (sfc_dp_rx_supported_ptypes_get_t)(
uint32_t tunnel_encaps);
/** Get number of pending Rx descriptors */
typedef unsigned int (sfc_dp_rx_qdesc_npending_t)(struct sfc_dp_rxq *dp_rxq);
/** Check Rx descriptor status */
typedef int (sfc_dp_rx_qdesc_status_t)(struct sfc_dp_rxq *dp_rxq,
uint16_t offset);
/** Receive datapath definition */
struct sfc_dp_rx {
struct sfc_dp dp;
unsigned int features;
#define SFC_DP_RX_FEAT_SCATTER 0x1
#define SFC_DP_RX_FEAT_MULTI_PROCESS 0x2
#define SFC_DP_RX_FEAT_TUNNELS 0x4
#define SFC_DP_RX_FEAT_FLOW_FLAG 0x8
#define SFC_DP_RX_FEAT_FLOW_MARK 0x10
sfc_dp_rx_get_dev_info_t *get_dev_info;
sfc_dp_rx_pool_ops_supported_t *pool_ops_supported;
sfc_dp_rx_qsize_up_rings_t *qsize_up_rings;
sfc_dp_rx_qcreate_t *qcreate;
sfc_dp_rx_qdestroy_t *qdestroy;
sfc_dp_rx_qstart_t *qstart;
sfc_dp_rx_qstop_t *qstop;
sfc_dp_rx_qrx_ev_t *qrx_ev;
sfc_dp_rx_qrx_ps_ev_t *qrx_ps_ev;
sfc_dp_rx_qpurge_t *qpurge;
sfc_dp_rx_supported_ptypes_get_t *supported_ptypes_get;
sfc_dp_rx_qdesc_npending_t *qdesc_npending;
sfc_dp_rx_qdesc_status_t *qdesc_status;
eth_rx_burst_t pkt_burst;
};
static inline struct sfc_dp_rx *
sfc_dp_find_rx_by_name(struct sfc_dp_list *head, const char *name)
{
struct sfc_dp *p = sfc_dp_find_by_name(head, SFC_DP_RX, name);
return (p == NULL) ? NULL : container_of(p, struct sfc_dp_rx, dp);
}
static inline struct sfc_dp_rx *
sfc_dp_find_rx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
{
struct sfc_dp *p = sfc_dp_find_by_caps(head, SFC_DP_RX, avail_caps);
return (p == NULL) ? NULL : container_of(p, struct sfc_dp_rx, dp);
}
extern struct sfc_dp_rx sfc_efx_rx;
extern struct sfc_dp_rx sfc_ef10_rx;
extern struct sfc_dp_rx sfc_ef10_essb_rx;
#ifdef __cplusplus
}
#endif
#endif /* _SFC_DP_RX_H */
|
