summaryrefslogtreecommitdiffstats
path: root/lib/librte_eal/common/eal_private.h
blob: 4f809a83c2a92f8d22910b5c1b78ae7d94ae5c55 (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
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
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2018 Intel Corporation
 */

#ifndef _EAL_PRIVATE_H_
#define _EAL_PRIVATE_H_

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>

#include <rte_dev.h>

/**
 * Initialize the memzone subsystem (private to eal).
 *
 * @return
 *   - 0 on success
 *   - Negative on error
 */
int rte_eal_memzone_init(void);

/**
 * Common log initialization function (private to eal).  Determines
 * where log data is written when no call to rte_openlog_stream is
 * in effect.
 *
 * @param default_log
 *   The default log stream to be used.
 * @return
 *   - 0 on success
 *   - Negative on error
 */
void eal_log_set_default(FILE *default_log);

/**
 * Fill configuration with number of physical and logical processors
 *
 * This function is private to EAL.
 *
 * Parse /proc/cpuinfo to get the number of physical and logical
 * processors on the machine.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_cpu_init(void);

/**
 * Create memseg lists
 *
 * This function is private to EAL.
 *
 * Preallocate virtual memory.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_memseg_init(void);

/**
 * Map memory
 *
 * This function is private to EAL.
 *
 * Fill configuration structure with these infos, and return 0 on success.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_memory_init(void);

/**
 * Configure timers
 *
 * This function is private to EAL.
 *
 * Mmap memory areas used by HPET (high precision event timer) that will
 * provide our time reference, and configure the TSC frequency also for it
 * to be used as a reference.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_timer_init(void);

/**
 * Init the default log stream
 *
 * This function is private to EAL.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_log_init(const char *id, int facility);

/**
 * Save the log regexp for later
 */
int rte_log_save_regexp(const char *type, int priority);
int rte_log_save_pattern(const char *pattern, int priority);

/**
 * Init tail queues for non-EAL library structures. This is to allow
 * the rings, mempools, etc. lists to be shared among multiple processes
 *
 * This function is private to EAL
 *
 * @return
 *    0 on success, negative on error
 */
int rte_eal_tailqs_init(void);

/**
 * Init interrupt handling.
 *
 * This function is private to EAL.
 *
 * @return
 *  0 on success, negative on error
 */
int rte_eal_intr_init(void);

/**
 * Init alarm mechanism. This is to allow a callback be called after
 * specific time.
 *
 * This function is private to EAL.
 *
 * @return
 *  0 on success, negative on error
 */
int rte_eal_alarm_init(void);

/**
 * Function is to check if the kernel module(like, vfio, vfio_iommu_type1,
 * etc.) loaded.
 *
 * @param module_name
 *	The module's name which need to be checked
 *
 * @return
 *	-1 means some error happens(NULL pointer or open failure)
 *	0  means the module not loaded
 *	1  means the module loaded
 */
int rte_eal_check_module(const char *module_name);

/**
 * Get virtual area of specified size from the OS.
 *
 * This function is private to the EAL.
 *
 * @param requested_addr
 *   Address where to request address space.
 * @param size
 *   Size of requested area.
 * @param page_sz
 *   Page size on which to align requested virtual area.
 * @param flags
 *   EAL_VIRTUAL_AREA_* flags.
 * @param mmap_flags
 *   Extra flags passed directly to mmap().
 *
 * @return
 *   Virtual area address if successful.
 *   NULL if unsuccessful.
 */

#define EAL_VIRTUAL_AREA_ADDR_IS_HINT (1 << 0)
/**< don't fail if cannot get exact requested address. */
#define EAL_VIRTUAL_AREA_ALLOW_SHRINK (1 << 1)
/**< try getting smaller sized (decrement by page size) virtual areas if cannot
 * get area of requested size.
 */
#define EAL_VIRTUAL_AREA_UNMAP (1 << 2)
/**< immediately unmap reserved virtual area. */
void *
eal_get_virtual_area(void *requested_addr, size_t *size,
		size_t page_sz, int flags, int mmap_flags);

/**
 * Get cpu core_id.
 *
 * This function is private to the EAL.
 */
unsigned eal_cpu_core_id(unsigned lcore_id);

/**
 * Check if cpu is present.
 *
 * This function is private to the EAL.
 */
int eal_cpu_detected(unsigned lcore_id);

/**
 * Set TSC frequency from precise value or estimation
 *
 * This function is private to the EAL.
 */
void set_tsc_freq(void);

/**
 * Get precise TSC frequency from system
 *
 * This function is private to the EAL.
 */
uint64_t get_tsc_freq(void);

/**
 * Get TSC frequency if the architecture supports.
 *
 * This function is private to the EAL.
 *
 * @return
 *   The number of TSC cycles in one second.
 *   Returns zero if the architecture support is not available.
 */
uint64_t get_tsc_freq_arch(void);

/**
 * Prepare physical memory mapping
 * i.e. hugepages on Linux and
 *      contigmem on BSD.
 *
 * This function is private to the EAL.
 */
int rte_eal_hugepage_init(void);

/**
 * Creates memory mapping in secondary process
 * i.e. hugepages on Linux and
 *      contigmem on BSD.
 *
 * This function is private to the EAL.
 */
int rte_eal_hugepage_attach(void);

/**
 * Find a bus capable of identifying a device.
 *
 * @param str
 *   A device identifier (PCI address, virtual PMD name, ...).
 *
 * @return
 *   A valid bus handle if found.
 *   NULL if no bus is able to parse this device.
 */
struct rte_bus *rte_bus_find_by_device_name(const char *str);

/**
 * Create the unix channel for primary/secondary communication.
 *
 * @return
 *   0 on success;
 *   (<0) on failure.
 */

int rte_mp_channel_init(void);

/**
 * Internal Executes all the user application registered callbacks for
 * the specific device. It is for DPDK internal user only. User
 * application should not call it directly.
 *
 * @param device_name
 *  The device name.
 * @param event
 *  the device event type.
 */
void dev_callback_process(char *device_name, enum rte_dev_event_type event);

/**
 * @internal
 * Parse a device string and store its information in an
 * rte_devargs structure.
 *
 * A device description is split by layers of abstraction of the device:
 * bus, class and driver. Each layer will offer a set of properties that
 * can be applied either to configure or recognize a device.
 *
 * This function will parse those properties and prepare the rte_devargs
 * to be given to each layers for processing.
 *
 * Note: if the "data" field of the devargs points to devstr,
 * then no dynamic allocation is performed and the rte_devargs
 * can be safely discarded.
 *
 * Otherwise ``data`` will hold a workable copy of devstr, that will be
 * used by layers descriptors within rte_devargs. In this case,
 * any rte_devargs should be cleaned-up before being freed.
 *
 * @param da
 *   rte_devargs structure to fill.
 *
 * @param devstr
 *   Device string.
 *
 * @return
 *   0 on success.
 *   Negative errno values on error (rte_errno is set).
 */
int
rte_devargs_layers_parse(struct rte_devargs *devargs,
			 const char *devstr);

#endif /* _EAL_PRIVATE_H_ */