DPDK logo

Elixir Cross Referencer

  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
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2015 6WIND S.A.
 * Copyright 2015 Mellanox Technologies, Ltd
 */

#ifndef RTE_PMD_MLX5_UTILS_H_
#define RTE_PMD_MLX5_UTILS_H_

#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <limits.h>
#include <errno.h>

#include <rte_spinlock.h>
#include <rte_memory.h>
#include <rte_bitmap.h>

#include <mlx5_common.h>

#include "mlx5_defs.h"


/* Convert a bit number to the corresponding 64-bit mask */
#define MLX5_BITSHIFT(v) (UINT64_C(1) << (v))

/* Save and restore errno around argument evaluation. */
#define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0]))

extern int mlx5_logtype;

/* Generic printf()-like logging macro with automatic line feed. */
#define DRV_LOG(level, ...) \
	PMD_DRV_LOG_(level, mlx5_logtype, MLX5_DRIVER_NAME, \
		__VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \
		PMD_DRV_LOG_CPAREN)

#define INFO(...) DRV_LOG(INFO, __VA_ARGS__)
#define WARN(...) DRV_LOG(WARNING, __VA_ARGS__)
#define ERROR(...) DRV_LOG(ERR, __VA_ARGS__)

/* Convenience macros for accessing mbuf fields. */
#define NEXT(m) ((m)->next)
#define DATA_LEN(m) ((m)->data_len)
#define PKT_LEN(m) ((m)->pkt_len)
#define DATA_OFF(m) ((m)->data_off)
#define SET_DATA_OFF(m, o) ((m)->data_off = (o))
#define NB_SEGS(m) ((m)->nb_segs)
#define PORT(m) ((m)->port)

/* Transpose flags. Useful to convert IBV to DPDK flags. */
#define TRANSPOSE(val, from, to) \
	(((from) >= (to)) ? \
	 (((val) & (from)) / ((from) / (to))) : \
	 (((val) & (from)) * ((to) / (from))))

/*
 * For the case which data is linked with sequence increased index, the
 * array table will be more efficiect than hash table once need to serarch
 * one data entry in large numbers of entries. Since the traditional hash
 * tables has fixed table size, when huge numbers of data saved to the hash
 * table, it also comes lots of hash conflict.
 *
 * But simple array table also has fixed size, allocates all the needed
 * memory at once will waste lots of memory. For the case don't know the
 * exactly number of entries will be impossible to allocate the array.
 *
 * Then the multiple level table helps to balance the two disadvantages.
 * Allocate a global high level table with sub table entries at first,
 * the global table contains the sub table entries, and the sub table will
 * be allocated only once the corresponding index entry need to be saved.
 * e.g. for up to 32-bits index, three level table with 10-10-12 splitting,
 * with sequence increased index, the memory grows with every 4K entries.
 *
 * The currently implementation introduces 10-10-12 32-bits splitting
 * Three-Level table to help the cases which have millions of enties to
 * save. The index entries can be addressed directly by the index, no
 * search will be needed.q
 */

/* L3 table global table define. */
#define MLX5_L3T_GT_OFFSET 22
#define MLX5_L3T_GT_SIZE (1 << 10)
#define MLX5_L3T_GT_MASK (MLX5_L3T_GT_SIZE - 1)

/* L3 table middle table define. */
#define MLX5_L3T_MT_OFFSET 12
#define MLX5_L3T_MT_SIZE (1 << 10)
#define MLX5_L3T_MT_MASK (MLX5_L3T_MT_SIZE - 1)

/* L3 table entry table define. */
#define MLX5_L3T_ET_OFFSET 0
#define MLX5_L3T_ET_SIZE (1 << 12)
#define MLX5_L3T_ET_MASK (MLX5_L3T_ET_SIZE - 1)

/* L3 table type. */
enum mlx5_l3t_type {
	MLX5_L3T_TYPE_WORD = 0,
	MLX5_L3T_TYPE_DWORD,
	MLX5_L3T_TYPE_QWORD,
	MLX5_L3T_TYPE_PTR,
	MLX5_L3T_TYPE_MAX,
};

struct mlx5_indexed_pool;

/* Generic data struct. */
union mlx5_l3t_data {
	uint16_t word;
	uint32_t dword;
	uint64_t qword;
	void *ptr;
};

/* L3 level table data structure. */
struct mlx5_l3t_level_tbl {
	uint64_t ref_cnt; /* Table ref_cnt. */
	void *tbl[]; /* Table array. */
};

/* L3 word entry table data structure. */
struct mlx5_l3t_entry_word {
	uint32_t idx; /* Table index. */
	uint64_t ref_cnt; /* Table ref_cnt. */
	uint16_t entry[]; /* Entry array. */
};

/* L3 double word entry table data structure. */
struct mlx5_l3t_entry_dword {
	uint32_t idx; /* Table index. */
	uint64_t ref_cnt; /* Table ref_cnt. */
	uint32_t entry[]; /* Entry array. */
};

/* L3 quad word entry table data structure. */
struct mlx5_l3t_entry_qword {
	uint32_t idx; /* Table index. */
	uint64_t ref_cnt; /* Table ref_cnt. */
	uint64_t entry[]; /* Entry array. */
};

/* L3 pointer entry table data structure. */
struct mlx5_l3t_entry_ptr {
	uint32_t idx; /* Table index. */
	uint64_t ref_cnt; /* Table ref_cnt. */
	void *entry[]; /* Entry array. */
};

/* L3 table data structure. */
struct mlx5_l3t_tbl {
	enum mlx5_l3t_type type; /* Table type. */
	struct mlx5_indexed_pool *eip;
	/* Table index pool handles. */
	struct mlx5_l3t_level_tbl *tbl; /* Global table index. */
};

/*
 * The indexed memory entry index is made up of trunk index and offset of
 * the entry in the trunk. Since the entry index is 32 bits, in case user
 * prefers to have small trunks, user can change the macro below to a big
 * number which helps the pool contains more trunks with lots of entries
 * allocated.
 */
#define TRUNK_IDX_BITS 16
#define TRUNK_MAX_IDX ((1 << TRUNK_IDX_BITS) - 1)
#define TRUNK_INVALID TRUNK_MAX_IDX
#define MLX5_IPOOL_DEFAULT_TRUNK_SIZE (1 << (28 - TRUNK_IDX_BITS))
#ifdef RTE_LIBRTE_MLX5_DEBUG
#define POOL_DEBUG 1
#endif

struct mlx5_indexed_pool_config {
	uint32_t size; /* Pool entry size. */
	uint32_t trunk_size:22;
	/*
	 * Trunk entry number. Must be power of 2. It can be increased
	 * if trunk_grow enable. The trunk entry number increases with
	 * left shift grow_shift. Trunks with index are after grow_trunk
	 * will keep the entry number same with the last grow trunk.
	 */
	uint32_t grow_trunk:4;
	/*
	 * Trunks with entry number increase in the pool. Set it to 0
	 * to make the pool works as trunk entry fixed pool. It works
	 * only if grow_shift is not 0.
	 */
	uint32_t grow_shift:4;
	/*
	 * Trunk entry number increase shift value, stop after grow_trunk.
	 * It works only if grow_trunk is not 0.
	 */
	uint32_t need_lock:1;
	/* Lock is needed for multiple thread usage. */
	uint32_t release_mem_en:1; /* Rlease trunk when it is free. */
	const char *type; /* Memory allocate type name. */
	void *(*malloc)(uint32_t flags, size_t size, unsigned int align,
			int socket);
	/* User defined memory allocator. */
	void (*free)(void *addr); /* User defined memory release. */
};

struct mlx5_indexed_trunk {
	uint32_t idx; /* Trunk id. */
	uint32_t prev; /* Previous free trunk in free list. */
	uint32_t next; /* Next free trunk in free list. */
	uint32_t free; /* Free entries available */
	struct rte_bitmap *bmp;
	uint8_t data[] __rte_cache_aligned; /* Entry data start. */
};

struct mlx5_indexed_pool {
	struct mlx5_indexed_pool_config cfg; /* Indexed pool configuration. */
	rte_spinlock_t lock; /* Pool lock for multiple thread usage. */
	uint32_t n_trunk_valid; /* Trunks allocated. */
	uint32_t n_trunk; /* Trunk pointer array size. */
	/* Dim of trunk pointer array. */
	struct mlx5_indexed_trunk **trunks;
	uint32_t free_list; /* Index to first free trunk. */
#ifdef POOL_DEBUG
	uint32_t n_entry;
	uint32_t trunk_new;
	uint32_t trunk_avail;
	uint32_t trunk_empty;
	uint32_t trunk_free;
#endif
	uint32_t grow_tbl[]; /* Save the index offset for the grow trunks. */
};

/**
 * Return logarithm of the nearest power of two above input value.
 *
 * @param v
 *   Input value.
 *
 * @return
 *   Logarithm of the nearest power of two above input value.
 */
static inline unsigned int
log2above(unsigned int v)
{
	unsigned int l;
	unsigned int r;

	for (l = 0, r = 0; (v >> 1); ++l, v >>= 1)
		r |= (v & 1);
	return l + r;
}

/** Maximum size of string for naming the hlist table. */
#define MLX5_HLIST_NAMESIZE			32

/**
 * Structure of the entry in the hash list, user should define its own struct
 * that contains this in order to store the data. The 'key' is 64-bits right
 * now and its user's responsibility to guarantee there is no collision.
 */
struct mlx5_hlist_entry {
	LIST_ENTRY(mlx5_hlist_entry) next; /* entry pointers in the list. */
	uint64_t key; /* user defined 'key', could be the hash signature. */
};

/** Structure for hash head. */
LIST_HEAD(mlx5_hlist_head, mlx5_hlist_entry);

/** Type of function that is used to handle the data before freeing. */
typedef void (*mlx5_hlist_destroy_callback_fn)(void *p, void *ctx);

/** hash list table structure */
struct mlx5_hlist {
	char name[MLX5_HLIST_NAMESIZE]; /**< Name of the hash list. */
	/**< number of heads, need to be power of 2. */
	uint32_t table_sz;
	/**< mask to get the index of the list heads. */
	uint32_t mask;
	struct mlx5_hlist_head heads[];	/**< list head arrays. */
};

/**
 * Create a hash list table, the user can specify the list heads array size
 * of the table, now the size should be a power of 2 in order to get better
 * distribution for the entries. Each entry is a part of the whole data element
 * and the caller should be responsible for the data element's allocation and
 * cleanup / free. Key of each entry will be calculated with CRC in order to
 * generate a little fairer distribution.
 *
 * @param name
 *   Name of the hash list(optional).
 * @param size
 *   Heads array size of the hash list.
 *
 * @return
 *   Pointer of the hash list table created, NULL on failure.
 */
struct mlx5_hlist *mlx5_hlist_create(const char *name, uint32_t size);

/**
 * Search an entry matching the key.
 *
 * @param h
 *   Pointer to the hast list table.
 * @param key
 *   Key for the searching entry.
 *
 * @return
 *   Pointer of the hlist entry if found, NULL otherwise.
 */
struct mlx5_hlist_entry *mlx5_hlist_lookup(struct mlx5_hlist *h, uint64_t key);

/**
 * Insert an entry to the hash list table, the entry is only part of whole data
 * element and a 64B key is used for matching. User should construct the key or
 * give a calculated hash signature and guarantee there is no collision.
 *
 * @param h
 *   Pointer to the hast list table.
 * @param entry
 *   Entry to be inserted into the hash list table.
 *
 * @return
 *   - zero for success.
 *   - -EEXIST if the entry is already inserted.
 */
int mlx5_hlist_insert(struct mlx5_hlist *h, struct mlx5_hlist_entry *entry);

/**
 * Remove an entry from the hash list table. User should guarantee the validity
 * of the entry.
 *
 * @param h
 *   Pointer to the hast list table. (not used)
 * @param entry
 *   Entry to be removed from the hash list table.
 */
void mlx5_hlist_remove(struct mlx5_hlist *h __rte_unused,
		       struct mlx5_hlist_entry *entry);

/**
 * Destroy the hash list table, all the entries already inserted into the lists
 * will be handled by the callback function provided by the user (including
 * free if needed) before the table is freed.
 *
 * @param h
 *   Pointer to the hast list table.
 * @param cb
 *   Callback function for each inserted entry when destroying the hash list.
 * @param ctx
 *   Common context parameter used by callback function for each entry.
 */
void mlx5_hlist_destroy(struct mlx5_hlist *h,
			mlx5_hlist_destroy_callback_fn cb, void *ctx);

/**
 * This function allocates non-initialized memory entry from pool.
 * In NUMA systems, the memory entry allocated resides on the same
 * NUMA socket as the core that calls this function.
 *
 * Memory entry is allocated from memory trunk, no alignment.
 *
 * @param pool
 *   Pointer to indexed memory entry pool.
 *   No initialization required.
 * @param[out] idx
 *   Pointer to memory to save allocated index.
 *   Memory index always positive value.
 * @return
 *   - Pointer to the allocated memory entry.
 *   - NULL on error. Not enough memory, or invalid arguments.
 */
void *mlx5_ipool_malloc(struct mlx5_indexed_pool *pool, uint32_t *idx);

/**
 * This function allocates zero initialized memory entry from pool.
 * In NUMA systems, the memory entry allocated resides on the same
 * NUMA socket as the core that calls this function.
 *
 * Memory entry is allocated from memory trunk, no alignment.
 *
 * @param pool
 *   Pointer to indexed memory pool.
 *   No initialization required.
 * @param[out] idx
 *   Pointer to memory to save allocated index.
 *   Memory index always positive value.
 * @return
 *   - Pointer to the allocated memory entry .
 *   - NULL on error. Not enough memory, or invalid arguments.
 */
void *mlx5_ipool_zmalloc(struct mlx5_indexed_pool *pool, uint32_t *idx);

/**
 * This function frees indexed memory entry to pool.
 * Caller has to make sure that the index is allocated from same pool.
 *
 * @param pool
 *   Pointer to indexed memory pool.
 * @param idx
 *   Allocated memory entry index.
 */
void mlx5_ipool_free(struct mlx5_indexed_pool *pool, uint32_t idx);

/**
 * This function returns pointer of indexed memory entry from index.
 * Caller has to make sure that the index is valid, and allocated
 * from same pool.
 *
 * @param pool
 *   Pointer to indexed memory pool.
 * @param idx
 *   Allocated memory index.
 * @return
 *   - Pointer to indexed memory entry.
 */
void *mlx5_ipool_get(struct mlx5_indexed_pool *pool, uint32_t idx);

/**
 * This function creates indexed memory pool.
 * Caller has to configure the configuration accordingly.
 *
 * @param pool
 *   Pointer to indexed memory pool.
 * @param cfg
 *   Allocated memory index.
 */
struct mlx5_indexed_pool *
mlx5_ipool_create(struct mlx5_indexed_pool_config *cfg);

/**
 * This function releases all resources of pool.
 * Caller has to make sure that all indexes and memories allocated
 * from this pool not referenced anymore.
 *
 * @param pool
 *   Pointer to indexed memory pool.
 * @return
 *   - non-zero value on error.
 *   - 0 on success.
 */
int mlx5_ipool_destroy(struct mlx5_indexed_pool *pool);

/**
 * This function dumps debug info of pool.
 *
 * @param pool
 *   Pointer to indexed memory pool.
 */
void mlx5_ipool_dump(struct mlx5_indexed_pool *pool);

/**
 * This function allocates new empty Three-level table.
 *
 * @param type
 *   The l3t can set as word, double word, quad word or pointer with index.
 *
 * @return
 *   - Pointer to the allocated l3t.
 *   - NULL on error. Not enough memory, or invalid arguments.
 */
struct mlx5_l3t_tbl *mlx5_l3t_create(enum mlx5_l3t_type type);

/**
 * This function destroys Three-level table.
 *
 * @param tbl
 *   Pointer to the l3t.
 */
void mlx5_l3t_destroy(struct mlx5_l3t_tbl *tbl);

/**
 * This function gets the index entry from Three-level table.
 *
 * @param tbl
 *   Pointer to the l3t.
 * @param idx
 *   Index to the entry.
 * @param data
 *   Pointer to the memory which saves the entry data.
 *   When function call returns 0, data contains the entry data get from
 *   l3t.
 *   When function call returns -1, data is not modified.
 *
 * @return
 *   0 if success, -1 on error.
 */

uint32_t mlx5_l3t_get_entry(struct mlx5_l3t_tbl *tbl, uint32_t idx,
			    union mlx5_l3t_data *data);
/**
 * This function clears the index entry from Three-level table.
 *
 * @param tbl
 *   Pointer to the l3t.
 * @param idx
 *   Index to the entry.
 */
void mlx5_l3t_clear_entry(struct mlx5_l3t_tbl *tbl, uint32_t idx);

/**
 * This function gets the index entry from Three-level table.
 *
 * @param tbl
 *   Pointer to the l3t.
 * @param idx
 *   Index to the entry.
 * @param data
 *   Pointer to the memory which contains the entry data save to l3t.
 *
 * @return
 *   0 if success, -1 on error.
 */
uint32_t mlx5_l3t_set_entry(struct mlx5_l3t_tbl *tbl, uint32_t idx,
			    union mlx5_l3t_data *data);

/*
 * Macros for linked list based on indexed memory.
 * Example data structure:
 * struct Foo {
 *	ILIST_ENTRY(uint16_t) next;
 *	...
 * }
 *
 */
#define ILIST_ENTRY(type)						\
struct {								\
	type prev; /* Index of previous element. */			\
	type next; /* Index of next element. */				\
}

#define ILIST_INSERT(pool, head, idx, elem, field)			\
	do {								\
		typeof(elem) peer;					\
		MLX5_ASSERT((elem) && (idx));				\
		(elem)->field.next = *(head);				\
		(elem)->field.prev = 0;					\
		if (*(head)) {						\
			(peer) = mlx5_ipool_get(pool, *(head));		\
			if (peer)					\
				(peer)->field.prev = (idx);		\
		}							\
		*(head) = (idx);					\
	} while (0)

#define ILIST_REMOVE(pool, head, idx, elem, field)			\
	do {								\
		typeof(elem) peer;					\
		MLX5_ASSERT(elem);					\
		MLX5_ASSERT(head);					\
		if ((elem)->field.prev) {				\
			(peer) = mlx5_ipool_get				\
				 (pool, (elem)->field.prev);		\
			if (peer)					\
				(peer)->field.next = (elem)->field.next;\
		}							\
		if ((elem)->field.next) {				\
			(peer) = mlx5_ipool_get				\
				 (pool, (elem)->field.next);		\
			if (peer)					\
				(peer)->field.prev = (elem)->field.prev;\
		}							\
		if (*(head) == (idx))					\
			*(head) = (elem)->field.next;			\
	} while (0)

#define ILIST_FOREACH(pool, head, idx, elem, field)			\
	for ((idx) = (head), (elem) =					\
	     (idx) ? mlx5_ipool_get(pool, (idx)) : NULL; (elem);	\
	     idx = (elem)->field.next, (elem) =				\
	     (idx) ? mlx5_ipool_get(pool, idx) : NULL)

/* Single index list. */
#define SILIST_ENTRY(type)						\
struct {								\
	type next; /* Index of next element. */				\
}

#define SILIST_INSERT(head, idx, elem, field)				\
	do {								\
		MLX5_ASSERT((elem) && (idx));				\
		(elem)->field.next = *(head);				\
		*(head) = (idx);					\
	} while (0)

#define SILIST_FOREACH(pool, head, idx, elem, field)			\
	for ((idx) = (head), (elem) =					\
	     (idx) ? mlx5_ipool_get(pool, (idx)) : NULL; (elem);	\
	     idx = (elem)->field.next, (elem) =				\
	     (idx) ? mlx5_ipool_get(pool, idx) : NULL)

#endif /* RTE_PMD_MLX5_UTILS_H_ */