1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
5 #ifndef _RTE_BBDEV_OP_H_
6 #define _RTE_BBDEV_OP_H_
11 * Defines wireless base band layer 1 operations and capabilities
14 * @b EXPERIMENTAL: this API may change without prior notice
23 #include <rte_common.h>
25 #include <rte_memory.h>
26 #include <rte_mempool.h>
28 /* Number of columns in sub-block interleaver (36.212, section 5.1.4.1.1) */
29 #define RTE_BBDEV_C_SUBBLOCK (32)
30 /* Maximum size of Transport Block (36.213, Table, Table 7.1.7.2.5-1) */
31 #define RTE_BBDEV_MAX_TB_SIZE (391656)
32 /* Maximum size of Code Block (36.212, Table 5.1.3-3) */
33 #define RTE_BBDEV_MAX_CB_SIZE (6144)
34 /* Minimum size of Code Block (36.212, Table 5.1.3-3) */
35 #define RTE_BBDEV_MIN_CB_SIZE (40)
36 /* Maximum size of circular buffer */
37 #define RTE_BBDEV_MAX_KW (18528)
39 * Maximum number of Code Blocks in Transport Block. It is calculated based on
40 * maximum size of one Code Block and one Transport Block (considering CRC24A
42 * (391656 + 24) / (6144 - 24) = 64
44 #define RTE_BBDEV_MAX_CODE_BLOCKS (64)
46 /** Flags for turbo decoder operation and capability structure */
47 enum rte_bbdev_op_td_flag_bitmasks {
48 /**< If sub block de-interleaving is to be performed. */
49 RTE_BBDEV_TURBO_SUBBLOCK_DEINTERLEAVE = (1ULL << 0),
50 /**< To use CRC Type 24B (otherwise use CRC Type 24A). */
51 RTE_BBDEV_TURBO_CRC_TYPE_24B = (1ULL << 1),
52 /**< If turbo equalization is to be performed. */
53 RTE_BBDEV_TURBO_EQUALIZER = (1ULL << 2),
54 /**< If set, saturate soft output to +/-127 */
55 RTE_BBDEV_TURBO_SOFT_OUT_SATURATE = (1ULL << 3),
56 /**< Set to 1 to start iteration from even, else odd; one iteration =
59 RTE_BBDEV_TURBO_HALF_ITERATION_EVEN = (1ULL << 4),
60 /**< If 0, TD stops after CRC matches; else if 1, runs to end of next
61 * odd iteration after CRC matches
63 RTE_BBDEV_TURBO_CONTINUE_CRC_MATCH = (1ULL << 5),
64 /**< Set if soft output is required to be output */
65 RTE_BBDEV_TURBO_SOFT_OUTPUT = (1ULL << 6),
66 /**< Set to enable early termination mode */
67 RTE_BBDEV_TURBO_EARLY_TERMINATION = (1ULL << 7),
68 /**< Set if a device supports decoder dequeue interrupts */
69 RTE_BBDEV_TURBO_DEC_INTERRUPTS = (1ULL << 9),
70 /**< Set if positive LLR encoded input is supported. Positive LLR value
71 * represents the level of confidence for bit '1', and vice versa for
73 * This is mutually exclusive with RTE_BBDEV_TURBO_NEG_LLR_1_BIT_IN
74 * when used to formalize the input data format.
76 RTE_BBDEV_TURBO_POS_LLR_1_BIT_IN = (1ULL << 10),
77 /**< Set if negative LLR encoded input is supported. Negative LLR value
78 * represents the level of confidence for bit '1', and vice versa for
80 * This is mutually exclusive with RTE_BBDEV_TURBO_POS_LLR_1_BIT_IN
81 * when used to formalize the input data format.
83 RTE_BBDEV_TURBO_NEG_LLR_1_BIT_IN = (1ULL << 11),
84 /**< Set if positive LLR soft output is supported. Positive LLR value
85 * represents the level of confidence for bit '1', and vice versa for
87 * This is mutually exclusive with
88 * RTE_BBDEV_TURBO_NEG_LLR_1_BIT_SOFT_OUT when used to formalize
89 * the input data format.
91 RTE_BBDEV_TURBO_POS_LLR_1_BIT_SOFT_OUT = (1ULL << 12),
92 /**< Set if negative LLR soft output is supported. Negative LLR value
93 * represents the level of confidence for bit '1', and vice versa for
95 * This is mutually exclusive with
96 * RTE_BBDEV_TURBO_POS_LLR_1_BIT_SOFT_OUT when used to formalize the
99 RTE_BBDEV_TURBO_NEG_LLR_1_BIT_SOFT_OUT = (1ULL << 13),
100 /**< Set if driver supports flexible parallel MAP engine decoding. If
101 * not supported, num_maps (number of MAP engines) argument is unusable.
103 RTE_BBDEV_TURBO_MAP_DEC = (1ULL << 14),
104 /**< Set if a device supports scatter-gather functionality */
105 RTE_BBDEV_TURBO_DEC_SCATTER_GATHER = (1ULL << 15),
106 /**< Set to keep CRC24B bits appended while decoding. Only usable when
107 * decoding Transport Blocks (code_block_mode = 0).
109 RTE_BBDEV_TURBO_DEC_TB_CRC_24B_KEEP = (1ULL << 16)
112 /** Flags for turbo encoder operation and capability structure */
113 enum rte_bbdev_op_te_flag_bitmasks {
114 /**< Ignore rv_index and set K0 = 0 */
115 RTE_BBDEV_TURBO_RV_INDEX_BYPASS = (1ULL << 0),
116 /**< If rate matching is to be performed */
117 RTE_BBDEV_TURBO_RATE_MATCH = (1ULL << 1),
118 /**< This bit must be set to enable CRC-24B generation */
119 RTE_BBDEV_TURBO_CRC_24B_ATTACH = (1ULL << 2),
120 /**< This bit must be set to enable CRC-24A generation */
121 RTE_BBDEV_TURBO_CRC_24A_ATTACH = (1ULL << 3),
122 /**< Set if a device supports encoder dequeue interrupts */
123 RTE_BBDEV_TURBO_ENC_INTERRUPTS = (1ULL << 4),
124 /**< Set if a device supports scatter-gather functionality */
125 RTE_BBDEV_TURBO_ENC_SCATTER_GATHER = (1ULL << 5)
128 /**< Data input and output buffer for BBDEV operations */
129 struct rte_bbdev_op_data {
130 /**< The mbuf data structure representing the data for BBDEV operation.
132 * This mbuf pointer can point to one Code Block (CB) data buffer or
133 * multiple CBs contiguously located next to each other.
134 * A Transport Block (TB) represents a whole piece of data that is
135 * divided into one or more CBs. Maximum number of CBs can be contained
136 * in one TB is defined by RTE_BBDEV_MAX_CODE_BLOCKS.
138 * An mbuf data structure cannot represent more than one TB. The
139 * smallest piece of data that can be contained in one mbuf is one CB.
140 * An mbuf can include one contiguous CB, subset of contiguous CBs that
141 * are belonging to one TB, or all contiguous CBs that are belonging to
144 * If a BBDEV PMD supports the extended capability "Scatter-Gather",
145 * then it is capable of collecting (gathering) non-contiguous
146 * (scattered) data from multiple locations in the memory.
147 * This capability is reported by the capability flags:
148 * - RTE_BBDEV_TURBO_ENC_SCATTER_GATHER and
149 * - RTE_BBDEV_TURBO_DEC_SCATTER_GATHER.
150 * Only if a BBDEV PMD supports this feature, chained mbuf data
151 * structures are accepted. A chained mbuf can represent one
152 * non-contiguous CB or multiple non-contiguous CBs.
153 * If BBDEV PMD does not support this feature, it will assume inbound
154 * mbuf data contains one segment.
156 * The output mbuf data though is always one segment, even if the input
157 * was a chained mbuf.
159 struct rte_mbuf *data;
160 /**< The starting point of the BBDEV (encode/decode) operation,
163 * BBDEV starts to read data past this offset.
164 * In case of chained mbuf, this offset applies only to the first mbuf
168 /**< The total data length to be processed in one operation, in bytes.
170 * In case the mbuf data is representing one CB, this is the length of
171 * the CB undergoing the operation.
172 * If it's for multiple CBs, this is the total length of those CBs
173 * undergoing the operation.
174 * If it's for one TB, this is the total length of the TB under
177 * In case of chained mbuf, this data length includes the lengths of the
178 * "scattered" data segments undergoing the operation.
183 struct rte_bbdev_op_dec_cb_params {
184 /**< The K size of the input CB, in bits [40:6144], as specified in
186 * This size is inclusive of CRC bits, regardless whether it was
187 * pre-calculated by the application or not.
190 /**< The E length of the CB rate matched LLR output, in bytes, as in
196 struct rte_bbdev_op_dec_tb_params {
197 /**< The K- size of the input CB, in bits [40:6144], that is in the
198 * Turbo operation when r < C-, as in 3GPP TS 36.212.
201 /**< The K+ size of the input CB, in bits [40:6144], that is in the
202 * Turbo operation when r >= C-, as in 3GPP TS 36.212.
205 /**< The number of CBs that have K- size, [0:63] */
207 /**< The total number of CBs in the TB, [1:RTE_BBDEV_MAX_CODE_BLOCKS] */
209 /**< The number of CBs that uses Ea before switching to Eb, [0:63] */
211 /**< The E size of the CB rate matched output to use in the Turbo
212 * operation when r < cab
215 /**< The E size of the CB rate matched output to use in the Turbo
216 * operation when r >= cab
219 /**< The index of the first CB in the inbound mbuf data, default is 0 */
223 /**< Operation structure for Turbo decode.
224 * An operation can perform on one CB at a time "CB-mode".
225 * An operation can perform on one or multiple CBs that are logically belonging
226 * to one TB "TB-mode".
227 * The provided K size parameter of the CB is its size out coming from the
229 * CRC24A/B check is requested by the application by setting the flag
230 * RTE_BBDEV_TURBO_CRC_TYPE_24B for CRC24B check or CRC24A otherwise.
231 * In TB-mode, BBDEV concatenates the decoded CBs one next to the other with
232 * relevant CRC24B in between.
234 * The input encoded CB data is the Virtual Circular Buffer data stream, wk,
235 * with the null padding included as described in 3GPP TS 36.212
236 * section 5.1.4.1.2 and shown in 3GPP TS 36.212 section 5.1.4.1 Figure 5.1.4-1.
237 * The size of the virtual circular buffer is 3*Kpi, where Kpi is the 32 byte
238 * aligned value of K, as specified in 3GPP TS 36.212 section 5.1.4.1.1.
240 * Each byte in the input circular buffer is the LLR value of each bit of the
243 * Hard output is a mandatory capability that all BBDEV PMDs support. This is
244 * the decoded CBs of K sizes (CRC24A/B is the last 24-bit in each decoded CB).
245 * Soft output is an optional capability for BBDEV PMDs. If supported, an LLR
246 * rate matched output is computed in the soft_output buffer structure.
248 * The output mbuf data structure is expected to be allocated by the
249 * application with enough room for the output data.
251 struct rte_bbdev_op_turbo_dec {
252 /**< The Virtual Circular Buffer, wk, size 3*Kpi for each CB */
253 struct rte_bbdev_op_data input;
254 /**< The hard decisions buffer for the decoded output,
257 struct rte_bbdev_op_data hard_output;
258 /**< The soft LLR output buffer - optional */
259 struct rte_bbdev_op_data soft_output;
261 uint32_t op_flags; /**< Flags from rte_bbdev_op_td_flag_bitmasks */
262 uint8_t rv_index; /**< Rv index for rate matching [0:3] */
263 /**< The minimum number of iterations to perform in decoding all CBs in
264 * this operation - input
267 /**< The maximum number of iterations to perform in decoding all CBs in
268 * this operation - input
271 /**< The maximum number of iterations that were perform in decoding all
272 * CBs in this decode operation - output
275 /**< 5 bit extrinsic scale (scale factor on extrinsic info) */
277 /**< Number of MAP engines to use in decode,
278 * must be power of 2 (or 0 to auto-select)
282 uint8_t code_block_mode; /**< [0 - TB : 1 - CB] */
284 /**< Struct which stores Code Block specific parameters */
285 struct rte_bbdev_op_dec_cb_params cb_params;
286 /**< Struct which stores Transport Block specific parameters */
287 struct rte_bbdev_op_dec_tb_params tb_params;
291 struct rte_bbdev_op_enc_cb_params {
292 /**< The K size of the input CB, in bits [40:6144], as specified in
294 * This size is inclusive of CRC24A, regardless whether it was
295 * pre-calculated by the application or not.
298 /**< The E length of the CB rate matched output, in bits, as in
302 /**< The Ncb soft buffer size of the CB rate matched output [K:3*Kpi],
303 * in bits, as specified in 3GPP TS 36.212.
308 struct rte_bbdev_op_enc_tb_params {
309 /**< The K- size of the input CB, in bits [40:6144], that is in the
310 * Turbo operation when r < C-, as in 3GPP TS 36.212.
311 * This size is inclusive of CRC24B, regardless whether it was
312 * pre-calculated and appended by the application or not.
315 /**< The K+ size of the input CB, in bits [40:6144], that is in the
316 * Turbo operation when r >= C-, as in 3GPP TS 36.212.
317 * This size is inclusive of CRC24B, regardless whether it was
318 * pre-calculated and appended by the application or not.
321 /**< The number of CBs that have K- size, [0:63] */
323 /**< The total number of CBs in the TB, [1:RTE_BBDEV_MAX_CODE_BLOCKS] */
325 /**< The number of CBs that uses Ea before switching to Eb, [0:63] */
327 /**< The E size of the CB rate matched output to use in the Turbo
328 * operation when r < cab
331 /**< The E size of the CB rate matched output to use in the Turbo
332 * operation when r >= cab
335 /**< The Ncb soft buffer size for the rate matched CB that is used in
336 * the Turbo operation when r < C-, [K:3*Kpi]
339 /**< The Ncb soft buffer size for the rate matched CB that is used in
340 * the Turbo operation when r >= C-, [K:3*Kpi]
343 /**< The index of the first CB in the inbound mbuf data, default is 0 */
347 /**< Operation structure for Turbo encode.
348 * An operation can perform on one CB at a time "CB-mode".
349 * An operation can perform on one or multiple CBs that are logically
350 * belonging to one TB "TB-mode".
352 * In CB-mode, CRC24A/B is an optional operation. K size parameter is not
353 * affected by CRC24A/B inclusion, this only affects the inbound mbuf data
354 * length. Not all BBDEV PMDs are capable of CRC24A/B calculation. Flags
355 * RTE_BBDEV_TURBO_CRC_24A_ATTACH and RTE_BBDEV_TURBO_CRC_24B_ATTACH informs
356 * the application with relevant capability. These flags can be set in the
357 * op_flags parameter to indicate BBDEV to calculate and append CRC24A to CB
358 * before going forward with Turbo encoding.
360 * In TB-mode, CRC24A is assumed to be pre-calculated and appended to the
361 * inbound TB mbuf data buffer.
363 * The output mbuf data structure is expected to be allocated by the
364 * application with enough room for the output data.
366 struct rte_bbdev_op_turbo_enc {
367 /**< The input CB or TB data */
368 struct rte_bbdev_op_data input;
369 /**< The rate matched CB or TB output buffer */
370 struct rte_bbdev_op_data output;
372 uint32_t op_flags; /**< Flags from rte_bbdev_op_te_flag_bitmasks */
373 uint8_t rv_index; /**< Rv index for rate matching [0:3] */
375 uint8_t code_block_mode; /**< [0 - TB : 1 - CB] */
377 /**< Struct which stores Code Block specific parameters */
378 struct rte_bbdev_op_enc_cb_params cb_params;
379 /**< Struct which stores Transport Block specific parameters */
380 struct rte_bbdev_op_enc_tb_params tb_params;
384 /**< List of the capabilities for the Turbo Decoder */
385 struct rte_bbdev_op_cap_turbo_dec {
386 /**< Flags from rte_bbdev_op_td_flag_bitmasks */
387 uint32_t capability_flags;
388 /** Maximal LLR absolute value. Acceptable LLR values lie in range
389 * [-max_llr_modulus, max_llr_modulus].
391 int8_t max_llr_modulus;
392 uint8_t num_buffers_src; /**< Num input code block buffers */
393 /**< Num hard output code block buffers */
394 uint8_t num_buffers_hard_out;
395 /**< Num soft output code block buffers if supported by the driver */
396 uint8_t num_buffers_soft_out;
399 /**< List of the capabilities for the Turbo Encoder */
400 struct rte_bbdev_op_cap_turbo_enc {
401 /**< Flags from rte_bbdev_op_te_flag_bitmasks */
402 uint32_t capability_flags;
403 uint8_t num_buffers_src; /**< Num input code block buffers */
404 uint8_t num_buffers_dst; /**< Num output code block buffers */
407 /** Different operation types supported by the device */
408 enum rte_bbdev_op_type {
409 RTE_BBDEV_OP_NONE, /**< Dummy operation that does nothing */
410 RTE_BBDEV_OP_TURBO_DEC, /**< Turbo decode */
411 RTE_BBDEV_OP_TURBO_ENC, /**< Turbo encode */
412 RTE_BBDEV_OP_TYPE_COUNT, /**< Count of different op types */
415 /**< Bit indexes of possible errors reported through status field */
418 RTE_BBDEV_DATA_ERROR,
422 /**< Structure specifying a single encode operation */
423 struct rte_bbdev_enc_op {
424 int status; /**< Status of operation that was performed */
425 struct rte_mempool *mempool; /**< Mempool which op instance is in */
426 void *opaque_data; /**< Opaque pointer for user data */
427 /**< Contains encoder specific parameters */
428 struct rte_bbdev_op_turbo_enc turbo_enc;
431 /**< Structure specifying a single decode operation */
432 struct rte_bbdev_dec_op {
433 int status; /**< Status of operation that was performed */
434 struct rte_mempool *mempool; /**< Mempool which op instance is in */
435 void *opaque_data; /**< Opaque pointer for user data */
436 /**< Contains decoder specific parameters */
437 struct rte_bbdev_op_turbo_dec turbo_dec;
440 /**< Operation capabilities supported by a device */
441 struct rte_bbdev_op_cap {
442 enum rte_bbdev_op_type type; /**< Type of operation */
444 struct rte_bbdev_op_cap_turbo_dec turbo_dec;
445 struct rte_bbdev_op_cap_turbo_enc turbo_enc;
446 } cap; /**< Operation-type specific capabilities */
449 /**< @internal Private data structure stored with operation pool. */
450 struct rte_bbdev_op_pool_private {
451 enum rte_bbdev_op_type type; /**< Type of operations in a pool */
455 * Converts queue operation type from enum to string
458 * Operation type as enum
461 * Operation type as string or NULL if op_type is invalid
464 const char* __rte_experimental
465 rte_bbdev_op_type_str(enum rte_bbdev_op_type op_type);
468 * Creates a bbdev operation mempool
473 * Operation type, use RTE_BBDEV_OP_NONE for a pool which supports all
475 * @param num_elements
476 * Number of elements in the pool.
478 * Number of elements to cache on an lcore, see rte_mempool_create() for
479 * further details about cache size.
481 * Socket to allocate memory on.
484 * - Pointer to a mempool on success,
485 * - NULL pointer on failure.
487 struct rte_mempool * __rte_experimental
488 rte_bbdev_op_pool_create(const char *name, enum rte_bbdev_op_type type,
489 unsigned int num_elements, unsigned int cache_size,
493 * Bulk allocate encode operations from a mempool with parameter defaults reset.
496 * Operation mempool, created by rte_bbdev_op_pool_create().
498 * Output array to place allocated operations
500 * Number of operations to allocate
504 * - EINVAL if invalid mempool is provided
506 static inline int __rte_experimental
507 rte_bbdev_enc_op_alloc_bulk(struct rte_mempool *mempool,
508 struct rte_bbdev_enc_op **ops, uint16_t num_ops)
510 struct rte_bbdev_op_pool_private *priv;
514 priv = (struct rte_bbdev_op_pool_private *)
515 rte_mempool_get_priv(mempool);
516 if (unlikely(priv->type != RTE_BBDEV_OP_TURBO_ENC))
520 ret = rte_mempool_get_bulk(mempool, (void **)ops, num_ops);
521 if (unlikely(ret < 0))
528 * Bulk allocate decode operations from a mempool with parameter defaults reset.
531 * Operation mempool, created by rte_bbdev_op_pool_create().
533 * Output array to place allocated operations
535 * Number of operations to allocate
539 * - EINVAL if invalid mempool is provided
541 static inline int __rte_experimental
542 rte_bbdev_dec_op_alloc_bulk(struct rte_mempool *mempool,
543 struct rte_bbdev_dec_op **ops, uint16_t num_ops)
545 struct rte_bbdev_op_pool_private *priv;
549 priv = (struct rte_bbdev_op_pool_private *)
550 rte_mempool_get_priv(mempool);
551 if (unlikely(priv->type != RTE_BBDEV_OP_TURBO_DEC))
555 ret = rte_mempool_get_bulk(mempool, (void **)ops, num_ops);
556 if (unlikely(ret < 0))
563 * Free decode operation structures that were allocated by
564 * rte_bbdev_dec_op_alloc_bulk().
565 * All structures must belong to the same mempool.
568 * Operation structures
570 * Number of structures
572 static inline void __rte_experimental
573 rte_bbdev_dec_op_free_bulk(struct rte_bbdev_dec_op **ops, unsigned int num_ops)
576 rte_mempool_put_bulk(ops[0]->mempool, (void **)ops, num_ops);
580 * Free encode operation structures that were allocated by
581 * rte_bbdev_enc_op_alloc_bulk().
582 * All structures must belong to the same mempool.
585 * Operation structures
587 * Number of structures
589 static inline void __rte_experimental
590 rte_bbdev_enc_op_free_bulk(struct rte_bbdev_enc_op **ops, unsigned int num_ops)
593 rte_mempool_put_bulk(ops[0]->mempool, (void **)ops, num_ops);
600 #endif /* _RTE_BBDEV_OP_H_ */