1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2015 6WIND S.A.
3 * Copyright 2015 Mellanox Technologies, Ltd
6 #ifndef RTE_PMD_MLX5_UTILS_H_
7 #define RTE_PMD_MLX5_UTILS_H_
16 #include "mlx5_defs.h"
19 * Compilation workaround for PPC64 when AltiVec is fully enabled, e.g. std=c11.
20 * Otherwise there would be a type conflict between stdbool and altivec.
22 #if defined(__PPC64__) && !defined(__APPLE_ALTIVEC__)
24 /* redefine as in stdbool.h */
28 /* Bit-field manipulation. */
29 #define BITFIELD_DECLARE(bf, type, size) \
30 type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \
31 !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
32 #define BITFIELD_DEFINE(bf, type, size) \
33 BITFIELD_DECLARE((bf), type, (size)) = { 0 }
34 #define BITFIELD_SET(bf, b) \
35 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
36 (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
37 ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
38 #define BITFIELD_RESET(bf, b) \
39 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
40 (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
41 ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
42 #define BITFIELD_ISSET(bf, b) \
43 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
44 !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
45 ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
47 /* Convert a bit number to the corresponding 64-bit mask */
48 #define MLX5_BITSHIFT(v) (UINT64_C(1) << (v))
50 /* Save and restore errno around argument evaluation. */
51 #define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0]))
54 * Helper macros to work around __VA_ARGS__ limitations in a C99 compliant
57 #define PMD_DRV_LOG_STRIP(a, b) a
58 #define PMD_DRV_LOG_OPAREN (
59 #define PMD_DRV_LOG_CPAREN )
60 #define PMD_DRV_LOG_COMMA ,
62 /* Return the file name part of a path. */
63 static inline const char *
64 pmd_drv_log_basename(const char *s)
74 extern int mlx5_logtype;
76 #define PMD_DRV_LOG___(level, ...) \
77 rte_log(RTE_LOG_ ## level, \
79 RTE_FMT(MLX5_DRIVER_NAME ": " \
80 RTE_FMT_HEAD(__VA_ARGS__,), \
81 RTE_FMT_TAIL(__VA_ARGS__,)))
84 * When debugging is enabled (NDEBUG not defined), file, line and function
85 * information replace the driver name (MLX5_DRIVER_NAME) in log messages.
89 #define PMD_DRV_LOG__(level, ...) \
90 PMD_DRV_LOG___(level, "%s:%u: %s(): " __VA_ARGS__)
91 #define PMD_DRV_LOG_(level, s, ...) \
92 PMD_DRV_LOG__(level, \
93 s "\n" PMD_DRV_LOG_COMMA \
94 pmd_drv_log_basename(__FILE__) PMD_DRV_LOG_COMMA \
95 __LINE__ PMD_DRV_LOG_COMMA \
100 #define PMD_DRV_LOG__(level, ...) \
101 PMD_DRV_LOG___(level, __VA_ARGS__)
102 #define PMD_DRV_LOG_(level, s, ...) \
103 PMD_DRV_LOG__(level, s "\n", __VA_ARGS__)
107 /* Generic printf()-like logging macro with automatic line feed. */
108 #define DRV_LOG(level, ...) \
109 PMD_DRV_LOG_(level, \
110 __VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \
113 /* claim_zero() does not perform any check when debugging is disabled. */
116 #define DEBUG(...) DRV_LOG(DEBUG, __VA_ARGS__)
117 #define claim_zero(...) assert((__VA_ARGS__) == 0)
118 #define claim_nonzero(...) assert((__VA_ARGS__) != 0)
122 #define DEBUG(...) (void)0
123 #define claim_zero(...) (__VA_ARGS__)
124 #define claim_nonzero(...) (__VA_ARGS__)
128 #define INFO(...) DRV_LOG(INFO, __VA_ARGS__)
129 #define WARN(...) DRV_LOG(WARNING, __VA_ARGS__)
130 #define ERROR(...) DRV_LOG(ERR, __VA_ARGS__)
132 /* Convenience macros for accessing mbuf fields. */
133 #define NEXT(m) ((m)->next)
134 #define DATA_LEN(m) ((m)->data_len)
135 #define PKT_LEN(m) ((m)->pkt_len)
136 #define DATA_OFF(m) ((m)->data_off)
137 #define SET_DATA_OFF(m, o) ((m)->data_off = (o))
138 #define NB_SEGS(m) ((m)->nb_segs)
139 #define PORT(m) ((m)->port)
141 /* Transpose flags. Useful to convert IBV to DPDK flags. */
142 #define TRANSPOSE(val, from, to) \
143 (((from) >= (to)) ? \
144 (((val) & (from)) / ((from) / (to))) : \
145 (((val) & (from)) * ((to) / (from))))
147 /* Allocate a buffer on the stack and fill it with a printf format string. */
148 #define MKSTR(name, ...) \
149 char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
151 snprintf(name, sizeof(name), __VA_ARGS__)
154 * Return logarithm of the nearest power of two above input value.
160 * Logarithm of the nearest power of two above input value.
162 static inline unsigned int
163 log2above(unsigned int v)
168 for (l = 0, r = 0; (v >> 1); ++l, v >>= 1)
173 /** Maximum size of string for naming the hlist table. */
174 #define MLX5_HLIST_NAMESIZE 32
177 * Structure of the entry in the hash list, user should define its own struct
178 * that contains this in order to store the data. The 'key' is 64-bits right
179 * now and its user's responsibility to guarantee there is no collision.
181 struct mlx5_hlist_entry {
182 LIST_ENTRY(mlx5_hlist_entry) next; /* entry pointers in the list. */
183 uint64_t key; /* user defined 'key', could be the hash signature. */
186 /** Structure for hash head. */
187 LIST_HEAD(mlx5_hlist_head, mlx5_hlist_entry);
189 /** Type of function that is used to handle the data before freeing. */
190 typedef void (*mlx5_hlist_destroy_callback_fn)(void *p, void *ctx);
192 /** hash list table structure */
194 char name[MLX5_HLIST_NAMESIZE]; /**< Name of the hash list. */
195 /**< number of heads, need to be power of 2. */
197 /**< mask to get the index of the list heads. */
199 struct mlx5_hlist_head heads[]; /**< list head arrays. */
203 * Create a hash list table, the user can specify the list heads array size
204 * of the table, now the size should be a power of 2 in order to get better
205 * distribution for the entries. Each entry is a part of the whole data element
206 * and the caller should be responsible for the data element's allocation and
207 * cleanup / free. Key of each entry will be calculated with CRC in order to
208 * generate a little fairer distribution.
211 * Name of the hash list(optional).
213 * Heads array size of the hash list.
216 * Pointer of the hash list table created, NULL on failure.
218 struct mlx5_hlist *mlx5_hlist_create(const char *name, uint32_t size);
221 * Search an entry matching the key.
224 * Pointer to the hast list table.
226 * Key for the searching entry.
229 * Pointer of the hlist entry if found, NULL otherwise.
231 struct mlx5_hlist_entry *mlx5_hlist_lookup(struct mlx5_hlist *h, uint64_t key);
234 * Insert an entry to the hash list table, the entry is only part of whole data
235 * element and a 64B key is used for matching. User should construct the key or
236 * give a calculated hash signature and guarantee there is no collision.
239 * Pointer to the hast list table.
241 * Entry to be inserted into the hash list table.
244 * - zero for success.
245 * - -EEXIST if the entry is already inserted.
247 int mlx5_hlist_insert(struct mlx5_hlist *h, struct mlx5_hlist_entry *entry);
250 * Remove an entry from the hash list table. User should guarantee the validity
254 * Pointer to the hast list table. (not used)
256 * Entry to be removed from the hash list table.
258 void mlx5_hlist_remove(struct mlx5_hlist *h __rte_unused,
259 struct mlx5_hlist_entry *entry);
262 * Destroy the hash list table, all the entries already inserted into the lists
263 * will be handled by the callback function provided by the user (including
264 * free if needed) before the table is freed.
267 * Pointer to the hast list table.
269 * Callback function for each inserted entry when destroying the hash list.
271 * Common context parameter used by callback function for each entry.
273 void mlx5_hlist_destroy(struct mlx5_hlist *h,
274 mlx5_hlist_destroy_callback_fn cb, void *ctx);
276 #endif /* RTE_PMD_MLX5_UTILS_H_ */