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
|
/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (c) 2003-2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/
/*
*
* Small helper utilities.
*
*/
#ifndef __CVMX_HELPER_UTIL_H__
#define __CVMX_HELPER_UTIL_H__
/**
* Convert a interface mode into a human readable string
*
* @mode: Mode to convert
*
* Returns String
*/
extern const char
*cvmx_helper_interface_mode_to_string(cvmx_helper_interface_mode_t mode);
/**
* Debug routine to dump the packet structure to the console
*
* @work: Work queue entry containing the packet to dump
* Returns
*/
extern int cvmx_helper_dump_packet(cvmx_wqe_t *work);
/**
* Setup Random Early Drop on a specific input queue
*
* @queue: Input queue to setup RED on (0-7)
* @pass_thresh:
* Packets will begin slowly dropping when there are less than
* this many packet buffers free in FPA 0.
* @drop_thresh:
* All incomming packets will be dropped when there are less
* than this many free packet buffers in FPA 0.
* Returns Zero on success. Negative on failure
*/
extern int cvmx_helper_setup_red_queue(int queue, int pass_thresh,
int drop_thresh);
/**
* Setup Random Early Drop to automatically begin dropping packets.
*
* @pass_thresh:
* Packets will begin slowly dropping when there are less than
* this many packet buffers free in FPA 0.
* @drop_thresh:
* All incomming packets will be dropped when there are less
* than this many free packet buffers in FPA 0.
* Returns Zero on success. Negative on failure
*/
extern int cvmx_helper_setup_red(int pass_thresh, int drop_thresh);
/**
* Get the version of the CVMX libraries.
*
* Returns Version string. Note this buffer is allocated statically
* and will be shared by all callers.
*/
extern const char *cvmx_helper_get_version(void);
/**
* Setup the common GMX settings that determine the number of
* ports. These setting apply to almost all configurations of all
* chips.
*
* @interface: Interface to configure
* @num_ports: Number of ports on the interface
*
* Returns Zero on success, negative on failure
*/
extern int __cvmx_helper_setup_gmx(int interface, int num_ports);
/**
* Returns the IPD/PKO port number for a port on the given
* interface.
*
* @interface: Interface to use
* @port: Port on the interface
*
* Returns IPD/PKO port number
*/
extern int cvmx_helper_get_ipd_port(int interface, int port);
/**
* Returns the IPD/PKO port number for the first port on the given
* interface.
*
* @interface: Interface to use
*
* Returns IPD/PKO port number
*/
static inline int cvmx_helper_get_first_ipd_port(int interface)
{
return cvmx_helper_get_ipd_port(interface, 0);
}
/**
* Returns the IPD/PKO port number for the last port on the given
* interface.
*
* @interface: Interface to use
*
* Returns IPD/PKO port number
*/
static inline int cvmx_helper_get_last_ipd_port(int interface)
{
extern int cvmx_helper_ports_on_interface(int interface);
return cvmx_helper_get_first_ipd_port(interface) +
cvmx_helper_ports_on_interface(interface) - 1;
}
/**
* Free the packet buffers contained in a work queue entry.
* The work queue entry is not freed.
*
* @work: Work queue entry with packet to free
*/
static inline void cvmx_helper_free_packet_data(cvmx_wqe_t *work)
{
uint64_t number_buffers;
union cvmx_buf_ptr buffer_ptr;
union cvmx_buf_ptr next_buffer_ptr;
uint64_t start_of_buffer;
number_buffers = work->word2.s.bufs;
if (number_buffers == 0)
return;
buffer_ptr = work->packet_ptr;
/*
* Since the number of buffers is not zero, we know this is
* not a dynamic short packet. We need to check if it is a
* packet received with IPD_CTL_STATUS[NO_WPTR]. If this is
* true, we need to free all buffers except for the first
* one. The caller doesn't expect their WQE pointer to be
* freed
*/
start_of_buffer = ((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7;
if (cvmx_ptr_to_phys(work) == start_of_buffer) {
next_buffer_ptr =
*(union cvmx_buf_ptr *) cvmx_phys_to_ptr(buffer_ptr.s.addr - 8);
buffer_ptr = next_buffer_ptr;
number_buffers--;
}
while (number_buffers--) {
/*
* Remember the back pointer is in cache lines, not
* 64bit words
*/
start_of_buffer =
((buffer_ptr.s.addr >> 7) - buffer_ptr.s.back) << 7;
/*
* Read pointer to next buffer before we free the
* current buffer.
*/
next_buffer_ptr =
*(union cvmx_buf_ptr *) cvmx_phys_to_ptr(buffer_ptr.s.addr - 8);
cvmx_fpa_free(cvmx_phys_to_ptr(start_of_buffer),
buffer_ptr.s.pool, 0);
buffer_ptr = next_buffer_ptr;
}
}
/**
* Returns the interface number for an IPD/PKO port number.
*
* @ipd_port: IPD/PKO port number
*
* Returns Interface number
*/
extern int cvmx_helper_get_interface_num(int ipd_port);
/**
* Returns the interface index number for an IPD/PKO port
* number.
*
* @ipd_port: IPD/PKO port number
*
* Returns Interface index number
*/
extern int cvmx_helper_get_interface_index_num(int ipd_port);
#endif /* __CVMX_HELPER_H__ */
|
