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
238
239
240
241
242
243
244
|
/*-
* Copyright (c) 2010-2015 Solarflare Communications Inc.
* All rights reserved.
*
* This software was developed in part by Philip Paeps under contract for
* 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.
*
* The views and conclusions contained in the software and documentation are
* those of the authors and should not be interpreted as representing official
* policies, either expressed or implied, of the FreeBSD Project.
*
* $FreeBSD$
*/
#ifndef _SFXGE_TX_H
#define _SFXGE_TX_H
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
/* If defined, parse TX packets directly in if_transmit
* for better cache locality and reduced time under TX lock
*/
#define SFXGE_TX_PARSE_EARLY 1
/* Maximum size of TSO packet */
#define SFXGE_TSO_MAX_SIZE (65535)
/*
* Maximum number of segments to be created for a TSO packet.
* Allow for a reasonable minimum MSS of 512.
*/
#define SFXGE_TSO_MAX_SEGS howmany(SFXGE_TSO_MAX_SIZE, 512)
/* Maximum number of DMA segments needed to map an mbuf chain. With
* TSO, the mbuf length may be just over 64K, divided into 2K mbuf
* clusters taking into account that the first may be not 2K cluster
* boundary aligned.
* Packet header may be split into two segments because of, for example,
* VLAN header insertion.
* The chain could be longer than this initially, but can be shortened
* with m_collapse().
*/
#define SFXGE_TX_MAPPING_MAX_SEG \
(2 + howmany(SFXGE_TSO_MAX_SIZE, MCLBYTES) + 1)
/*
* Buffer mapping flags.
*
* Buffers and DMA mappings must be freed when the last descriptor
* referring to them is completed. Set the TX_BUF_UNMAP and
* TX_BUF_MBUF flags on the last descriptor generated for an mbuf
* chain. Set only the TX_BUF_UNMAP flag on a descriptor referring to
* a heap buffer.
*/
enum sfxge_tx_buf_flags {
TX_BUF_UNMAP = 1,
TX_BUF_MBUF = 2,
};
/*
* Buffer mapping information for descriptors in flight.
*/
struct sfxge_tx_mapping {
union {
struct mbuf *mbuf;
caddr_t heap_buf;
} u;
bus_dmamap_t map;
enum sfxge_tx_buf_flags flags;
};
#define SFXGE_TX_DPL_GET_PKT_LIMIT_DEFAULT (64 * 1024)
#define SFXGE_TX_DPL_GET_NON_TCP_PKT_LIMIT_DEFAULT 1024
#define SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT 1024
/*
* Deferred packet list.
*/
struct sfxge_tx_dpl {
unsigned int std_get_max; /* Maximum number of packets
* in get list */
unsigned int std_get_non_tcp_max; /* Maximum number
* of non-TCP packets
* in get list */
unsigned int std_put_max; /* Maximum number of packets
* in put list */
uintptr_t std_put; /* Head of put list. */
struct mbuf *std_get; /* Head of get list. */
struct mbuf **std_getp; /* Tail of get list. */
unsigned int std_get_count; /* Packets in get list. */
unsigned int std_get_non_tcp_count; /* Non-TCP packets
* in get list */
unsigned int std_get_hiwat; /* Packets in get list
* high watermark */
unsigned int std_put_hiwat; /* Packets in put list
* high watermark */
};
#define SFXGE_TX_BUFFER_SIZE 0x400
#define SFXGE_TX_HEADER_SIZE 0x100
#define SFXGE_TX_COPY_THRESHOLD 0x200
enum sfxge_txq_state {
SFXGE_TXQ_UNINITIALIZED = 0,
SFXGE_TXQ_INITIALIZED,
SFXGE_TXQ_STARTED
};
enum sfxge_txq_type {
SFXGE_TXQ_NON_CKSUM = 0,
SFXGE_TXQ_IP_CKSUM,
SFXGE_TXQ_IP_TCP_UDP_CKSUM,
SFXGE_TXQ_NTYPES
};
#define SFXGE_TXQ_UNBLOCK_LEVEL(_entries) (EFX_TXQ_LIMIT(_entries) / 4)
#define SFXGE_TX_BATCH 64
#define SFXGE_TXQ_LOCK_INIT(_txq, _ifname, _txq_index) \
do { \
struct sfxge_txq *__txq = (_txq); \
\
snprintf((__txq)->lock_name, \
sizeof((__txq)->lock_name), \
"%s:txq%u", (_ifname), (_txq_index)); \
mtx_init(&(__txq)->lock, (__txq)->lock_name, \
NULL, MTX_DEF); \
} while (B_FALSE)
#define SFXGE_TXQ_LOCK_DESTROY(_txq) \
mtx_destroy(&(_txq)->lock)
#define SFXGE_TXQ_LOCK(_txq) \
mtx_lock(&(_txq)->lock)
#define SFXGE_TXQ_TRYLOCK(_txq) \
mtx_trylock(&(_txq)->lock)
#define SFXGE_TXQ_UNLOCK(_txq) \
mtx_unlock(&(_txq)->lock)
#define SFXGE_TXQ_LOCK_ASSERT_OWNED(_txq) \
mtx_assert(&(_txq)->lock, MA_OWNED)
#define SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(_txq) \
mtx_assert(&(_txq)->lock, MA_NOTOWNED)
struct sfxge_txq {
/* The following fields should be written very rarely */
struct sfxge_softc *sc;
enum sfxge_txq_state init_state;
enum sfxge_flush_state flush_state;
unsigned int tso_fw_assisted;
enum sfxge_txq_type type;
unsigned int txq_index;
unsigned int evq_index;
efsys_mem_t mem;
unsigned int buf_base_id;
unsigned int entries;
unsigned int ptr_mask;
unsigned int max_pkt_desc;
struct sfxge_tx_mapping *stmp; /* Packets in flight. */
bus_dma_tag_t packet_dma_tag;
efx_desc_t *pend_desc;
efx_txq_t *common;
efsys_mem_t *tsoh_buffer;
char lock_name[SFXGE_LOCK_NAME_MAX];
/* This field changes more often and is read regularly on both
* the initiation and completion paths
*/
int blocked __aligned(CACHE_LINE_SIZE);
/* The following fields change more often, and are used mostly
* on the initiation path
*/
struct mtx lock __aligned(CACHE_LINE_SIZE);
struct sfxge_tx_dpl dpl; /* Deferred packet list. */
unsigned int n_pend_desc;
unsigned int added;
unsigned int reaped;
/* The last VLAN TCI seen on the queue if FW-assisted tagging is
used */
uint16_t hw_vlan_tci;
/* Statistics */
unsigned long tso_bursts;
unsigned long tso_packets;
unsigned long tso_long_headers;
unsigned long collapses;
unsigned long drops;
unsigned long get_overflow;
unsigned long get_non_tcp_overflow;
unsigned long put_overflow;
unsigned long netdown_drops;
unsigned long tso_pdrop_too_many;
unsigned long tso_pdrop_no_rsrc;
/* The following fields change more often, and are used mostly
* on the completion path
*/
unsigned int pending __aligned(CACHE_LINE_SIZE);
unsigned int completed;
struct sfxge_txq *next;
};
struct sfxge_evq;
extern void sfxge_tx_update_stats(struct sfxge_softc *sc);
extern int sfxge_tx_init(struct sfxge_softc *sc);
extern void sfxge_tx_fini(struct sfxge_softc *sc);
extern int sfxge_tx_start(struct sfxge_softc *sc);
extern void sfxge_tx_stop(struct sfxge_softc *sc);
extern void sfxge_tx_qcomplete(struct sfxge_txq *txq, struct sfxge_evq *evq);
extern void sfxge_tx_qflush_done(struct sfxge_txq *txq);
extern void sfxge_if_qflush(struct ifnet *ifp);
extern int sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m);
#endif
|
