1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
3 */
4
5 #include <stdalign.h>
6 #include <stdio.h>
7 #include <string.h>
8
9 #include <rte_common.h>
10 #include <rte_log.h>
11 #include <rte_malloc.h>
12 #include <rte_cycles.h>
13 #include <rte_prefetch.h>
14 #include <rte_branch_prediction.h>
15 #include <rte_mbuf.h>
16 #include <rte_bitmap.h>
17 #include <rte_reciprocal.h>
18
19 #include "rte_sched.h"
20 #include "rte_sched_log.h"
21 #include "rte_sched_common.h"
22
23 #include "rte_approx.h"
24
25
26 #ifdef __INTEL_COMPILER
27 #pragma warning(disable:2259) /* conversion may lose significant bits */
28 #endif
29
30 #ifndef RTE_SCHED_PORT_N_GRINDERS
31 #define RTE_SCHED_PORT_N_GRINDERS 8
32 #endif
33
34 #define RTE_SCHED_TB_RATE_CONFIG_ERR (1e-7)
35 #define RTE_SCHED_WRR_SHIFT 3
36 #define RTE_SCHED_MAX_QUEUES_PER_TC RTE_SCHED_BE_QUEUES_PER_PIPE
37 #define RTE_SCHED_GRINDER_PCACHE_SIZE (64 / RTE_SCHED_QUEUES_PER_PIPE)
38 #define RTE_SCHED_PIPE_INVALID UINT32_MAX
39 #define RTE_SCHED_BMP_POS_INVALID UINT32_MAX
40
41 /* Scaling for cycles_per_byte calculation
42 * Chosen so that minimum rate is 480 bit/sec
43 */
44 #define RTE_SCHED_TIME_SHIFT 8
45
46 struct rte_sched_pipe_profile {
47 /* Token bucket (TB) */
48 uint64_t tb_period;
49 uint64_t tb_credits_per_period;
50 uint64_t tb_size;
51
52 /* Pipe traffic classes */
53 uint64_t tc_period;
54 uint64_t tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
55 uint8_t tc_ov_weight;
56
57 /* Pipe best-effort traffic class queues */
58 uint8_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
59 };
60
61 struct __rte_cache_aligned rte_sched_pipe {
62 /* Token bucket (TB) */
63 uint64_t tb_time; /* time of last update */
64 uint64_t tb_credits;
65
66 /* Pipe profile and flags */
67 uint32_t profile;
68
69 /* Traffic classes (TCs) */
70 uint64_t tc_time; /* time of next update */
71 uint64_t tc_credits[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
72
73 /* Weighted Round Robin (WRR) */
74 uint8_t wrr_tokens[RTE_SCHED_BE_QUEUES_PER_PIPE];
75
76 /* TC oversubscription */
77 uint64_t tc_ov_credits;
78 uint8_t tc_ov_period_id;
79 };
80
81 struct rte_sched_queue {
82 uint16_t qw;
83 uint16_t qr;
84 };
85
86 struct rte_sched_queue_extra {
87 struct rte_sched_queue_stats stats;
88 union {
89 struct rte_red red;
90 struct rte_pie pie;
91 };
92 };
93
94 enum grinder_state {
95 e_GRINDER_PREFETCH_PIPE = 0,
96 e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS,
97 e_GRINDER_PREFETCH_MBUF,
98 e_GRINDER_READ_MBUF
99 };
100
101 struct rte_sched_subport_profile {
102 /* Token bucket (TB) */
103 uint64_t tb_period;
104 uint64_t tb_credits_per_period;
105 uint64_t tb_size;
106
107 uint64_t tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
108 uint64_t tc_period;
109 };
110
111 struct rte_sched_grinder {
112 /* Pipe cache */
113 uint16_t pcache_qmask[RTE_SCHED_GRINDER_PCACHE_SIZE];
114 uint32_t pcache_qindex[RTE_SCHED_GRINDER_PCACHE_SIZE];
115 uint32_t pcache_w;
116 uint32_t pcache_r;
117
118 /* Current pipe */
119 enum grinder_state state;
120 uint32_t productive;
121 uint32_t pindex;
122 struct rte_sched_subport *subport;
123 struct rte_sched_subport_profile *subport_params;
124 struct rte_sched_pipe *pipe;
125 struct rte_sched_pipe_profile *pipe_params;
126
127 /* TC cache */
128 uint8_t tccache_qmask[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
129 uint32_t tccache_qindex[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
130 uint32_t tccache_w;
131 uint32_t tccache_r;
132
133 /* Current TC */
134 uint32_t tc_index;
135 struct rte_sched_queue *queue[RTE_SCHED_MAX_QUEUES_PER_TC];
136 struct rte_mbuf **qbase[RTE_SCHED_MAX_QUEUES_PER_TC];
137 uint32_t qindex[RTE_SCHED_MAX_QUEUES_PER_TC];
138 uint16_t qsize;
139 uint32_t qmask;
140 uint32_t qpos;
141 struct rte_mbuf *pkt;
142
143 /* WRR */
144 uint16_t wrr_tokens[RTE_SCHED_BE_QUEUES_PER_PIPE];
145 uint16_t wrr_mask[RTE_SCHED_BE_QUEUES_PER_PIPE];
146 uint8_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
147 };
148
149 struct __rte_cache_aligned rte_sched_subport {
150 /* Token bucket (TB) */
151 uint64_t tb_time; /* time of last update */
152 uint64_t tb_credits;
153
154 /* Traffic classes (TCs) */
155 uint64_t tc_time; /* time of next update */
156 uint64_t tc_credits[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
157
158 /* TC oversubscription */
159 uint64_t tc_ov_wm;
160 uint64_t tc_ov_wm_min;
161 uint64_t tc_ov_wm_max;
162 uint8_t tc_ov_period_id;
163 uint8_t tc_ov;
164 uint32_t tc_ov_n;
165 double tc_ov_rate;
166
167 /* Statistics */
168 alignas(RTE_CACHE_LINE_SIZE) struct rte_sched_subport_stats stats;
169
170 /* subport profile */
171 uint32_t profile;
172 /* Subport pipes */
173 uint32_t n_pipes_per_subport_enabled;
174 uint32_t n_pipe_profiles;
175 uint32_t n_max_pipe_profiles;
176
177 /* Pipe best-effort TC rate */
178 uint64_t pipe_tc_be_rate_max;
179
180 /* Pipe queues size */
181 uint16_t qsize[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
182
183 bool cman_enabled;
184 enum rte_sched_cman_mode cman;
185
186 union {
187 struct rte_red_config red_config[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE][RTE_COLORS];
188 struct rte_pie_config pie_config[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
189 };
190
191 /* Scheduling loop detection */
192 uint32_t pipe_loop;
193 uint32_t pipe_exhaustion;
194
195 /* Bitmap */
196 struct rte_bitmap *bmp;
197 alignas(16) uint32_t grinder_base_bmp_pos[RTE_SCHED_PORT_N_GRINDERS];
198
199 /* Grinders */
200 struct rte_sched_grinder grinder[RTE_SCHED_PORT_N_GRINDERS];
201 uint32_t busy_grinders;
202
203 /* Queue base calculation */
204 uint32_t qsize_add[RTE_SCHED_QUEUES_PER_PIPE];
205 uint32_t qsize_sum;
206
207 /* TC oversubscription activation */
208 int tc_ov_enabled;
209
210 struct rte_sched_pipe *pipe;
211 struct rte_sched_queue *queue;
212 struct rte_sched_queue_extra *queue_extra;
213 struct rte_sched_pipe_profile *pipe_profiles;
214 uint8_t *bmp_array;
215 struct rte_mbuf **queue_array;
216 alignas(RTE_CACHE_LINE_SIZE) uint8_t memory[0];
217 };
218
219 struct __rte_cache_aligned rte_sched_port {
220 /* User parameters */
221 uint32_t n_subports_per_port;
222 uint32_t n_pipes_per_subport;
223 uint32_t n_pipes_per_subport_log2;
224 uint16_t pipe_queue[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
225 uint8_t pipe_tc[RTE_SCHED_QUEUES_PER_PIPE];
226 uint8_t tc_queue[RTE_SCHED_QUEUES_PER_PIPE];
227 uint32_t n_subport_profiles;
228 uint32_t n_max_subport_profiles;
229 uint64_t rate;
230 uint32_t mtu;
231 uint32_t frame_overhead;
232 int socket;
233
234 /* Timing */
235 uint64_t time_cpu_cycles; /* Current CPU time measured in CPU cycles */
236 uint64_t time_cpu_bytes; /* Current CPU time measured in bytes */
237 uint64_t time; /* Current NIC TX time measured in bytes */
238 struct rte_reciprocal inv_cycles_per_byte; /* CPU cycles per byte */
239 uint64_t cycles_per_byte;
240
241 /* Grinders */
242 struct rte_mbuf **pkts_out;
243 uint32_t n_pkts_out;
244 uint32_t subport_id;
245
246 /* Large data structures */
247 struct rte_sched_subport_profile *subport_profiles;
248 alignas(RTE_CACHE_LINE_SIZE) struct rte_sched_subport *subports[0];
249 };
250
251 enum rte_sched_subport_array {
252 e_RTE_SCHED_SUBPORT_ARRAY_PIPE = 0,
253 e_RTE_SCHED_SUBPORT_ARRAY_QUEUE,
254 e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA,
255 e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES,
256 e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY,
257 e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY,
258 e_RTE_SCHED_SUBPORT_ARRAY_TOTAL,
259 };
260
261 static inline uint32_t
rte_sched_subport_pipe_queues(struct rte_sched_subport * subport)262 rte_sched_subport_pipe_queues(struct rte_sched_subport *subport)
263 {
264 return RTE_SCHED_QUEUES_PER_PIPE * subport->n_pipes_per_subport_enabled;
265 }
266
267 static inline struct rte_mbuf **
rte_sched_subport_pipe_qbase(struct rte_sched_subport * subport,uint32_t qindex)268 rte_sched_subport_pipe_qbase(struct rte_sched_subport *subport, uint32_t qindex)
269 {
270 uint32_t pindex = qindex >> 4;
271 uint32_t qpos = qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1);
272
273 return (subport->queue_array + pindex *
274 subport->qsize_sum + subport->qsize_add[qpos]);
275 }
276
277 static inline uint16_t
rte_sched_subport_pipe_qsize(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t qindex)278 rte_sched_subport_pipe_qsize(struct rte_sched_port *port,
279 struct rte_sched_subport *subport, uint32_t qindex)
280 {
281 uint32_t tc = port->pipe_tc[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
282
283 return subport->qsize[tc];
284 }
285
286 static inline uint32_t
rte_sched_port_queues_per_port(struct rte_sched_port * port)287 rte_sched_port_queues_per_port(struct rte_sched_port *port)
288 {
289 uint32_t n_queues = 0, i;
290
291 for (i = 0; i < port->n_subports_per_port; i++)
292 n_queues += rte_sched_subport_pipe_queues(port->subports[i]);
293
294 return n_queues;
295 }
296
297 static inline uint16_t
rte_sched_port_pipe_queue(struct rte_sched_port * port,uint32_t traffic_class)298 rte_sched_port_pipe_queue(struct rte_sched_port *port, uint32_t traffic_class)
299 {
300 uint16_t pipe_queue = port->pipe_queue[traffic_class];
301
302 return pipe_queue;
303 }
304
305 static inline uint8_t
rte_sched_port_pipe_tc(struct rte_sched_port * port,uint32_t qindex)306 rte_sched_port_pipe_tc(struct rte_sched_port *port, uint32_t qindex)
307 {
308 uint8_t pipe_tc = port->pipe_tc[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
309
310 return pipe_tc;
311 }
312
313 static inline uint8_t
rte_sched_port_tc_queue(struct rte_sched_port * port,uint32_t qindex)314 rte_sched_port_tc_queue(struct rte_sched_port *port, uint32_t qindex)
315 {
316 uint8_t tc_queue = port->tc_queue[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
317
318 return tc_queue;
319 }
320
321 static int
pipe_profile_check(struct rte_sched_pipe_params * params,uint64_t rate,uint16_t * qsize)322 pipe_profile_check(struct rte_sched_pipe_params *params,
323 uint64_t rate, uint16_t *qsize)
324 {
325 uint32_t i;
326
327 /* Pipe parameters */
328 if (params == NULL) {
329 SCHED_LOG(ERR,
330 "%s: Incorrect value for parameter params", __func__);
331 return -EINVAL;
332 }
333
334 /* TB rate: non-zero, not greater than port rate */
335 if (params->tb_rate == 0 ||
336 params->tb_rate > rate) {
337 SCHED_LOG(ERR,
338 "%s: Incorrect value for tb rate", __func__);
339 return -EINVAL;
340 }
341
342 /* TB size: non-zero */
343 if (params->tb_size == 0) {
344 SCHED_LOG(ERR,
345 "%s: Incorrect value for tb size", __func__);
346 return -EINVAL;
347 }
348
349 /* TC rate: non-zero if qsize non-zero, less than pipe rate */
350 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
351 if ((qsize[i] == 0 && params->tc_rate[i] != 0) ||
352 (qsize[i] != 0 && (params->tc_rate[i] == 0 ||
353 params->tc_rate[i] > params->tb_rate))) {
354 SCHED_LOG(ERR,
355 "%s: Incorrect value for qsize or tc_rate", __func__);
356 return -EINVAL;
357 }
358 }
359
360 if (params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE] == 0 ||
361 qsize[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
362 SCHED_LOG(ERR,
363 "%s: Incorrect value for be traffic class rate", __func__);
364 return -EINVAL;
365 }
366
367 /* TC period: non-zero */
368 if (params->tc_period == 0) {
369 SCHED_LOG(ERR,
370 "%s: Incorrect value for tc period", __func__);
371 return -EINVAL;
372 }
373
374 /* Best effort tc oversubscription weight: non-zero */
375 if (params->tc_ov_weight == 0) {
376 SCHED_LOG(ERR,
377 "%s: Incorrect value for tc ov weight", __func__);
378 return -EINVAL;
379 }
380
381 /* Queue WRR weights: non-zero */
382 for (i = 0; i < RTE_SCHED_BE_QUEUES_PER_PIPE; i++) {
383 if (params->wrr_weights[i] == 0) {
384 SCHED_LOG(ERR,
385 "%s: Incorrect value for wrr weight", __func__);
386 return -EINVAL;
387 }
388 }
389
390 return 0;
391 }
392
393 static int
subport_profile_check(struct rte_sched_subport_profile_params * params,uint64_t rate)394 subport_profile_check(struct rte_sched_subport_profile_params *params,
395 uint64_t rate)
396 {
397 uint32_t i;
398
399 /* Check user parameters */
400 if (params == NULL) {
401 SCHED_LOG(ERR, "%s: "
402 "Incorrect value for parameter params", __func__);
403 return -EINVAL;
404 }
405
406 if (params->tb_rate == 0 || params->tb_rate > rate) {
407 SCHED_LOG(ERR, "%s: "
408 "Incorrect value for tb rate", __func__);
409 return -EINVAL;
410 }
411
412 if (params->tb_size == 0) {
413 SCHED_LOG(ERR, "%s: "
414 "Incorrect value for tb size", __func__);
415 return -EINVAL;
416 }
417
418 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
419 uint64_t tc_rate = params->tc_rate[i];
420
421 if (tc_rate == 0 || (tc_rate > params->tb_rate)) {
422 SCHED_LOG(ERR, "%s: "
423 "Incorrect value for tc rate", __func__);
424 return -EINVAL;
425 }
426 }
427
428 if (params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
429 SCHED_LOG(ERR, "%s: "
430 "Incorrect tc rate(best effort)", __func__);
431 return -EINVAL;
432 }
433
434 if (params->tc_period == 0) {
435 SCHED_LOG(ERR, "%s: "
436 "Incorrect value for tc period", __func__);
437 return -EINVAL;
438 }
439
440 return 0;
441 }
442
443 static int
rte_sched_port_check_params(struct rte_sched_port_params * params)444 rte_sched_port_check_params(struct rte_sched_port_params *params)
445 {
446 uint32_t i;
447
448 if (params == NULL) {
449 SCHED_LOG(ERR,
450 "%s: Incorrect value for parameter params", __func__);
451 return -EINVAL;
452 }
453
454 /* socket */
455 if (params->socket < 0) {
456 SCHED_LOG(ERR,
457 "%s: Incorrect value for socket id", __func__);
458 return -EINVAL;
459 }
460
461 /* rate */
462 if (params->rate == 0) {
463 SCHED_LOG(ERR,
464 "%s: Incorrect value for rate", __func__);
465 return -EINVAL;
466 }
467
468 /* mtu */
469 if (params->mtu == 0) {
470 SCHED_LOG(ERR,
471 "%s: Incorrect value for mtu", __func__);
472 return -EINVAL;
473 }
474
475 /* n_subports_per_port: non-zero, limited to 16 bits, power of 2 */
476 if (params->n_subports_per_port == 0 ||
477 params->n_subports_per_port > 1u << 16 ||
478 !rte_is_power_of_2(params->n_subports_per_port)) {
479 SCHED_LOG(ERR,
480 "%s: Incorrect value for number of subports", __func__);
481 return -EINVAL;
482 }
483
484 if (params->subport_profiles == NULL ||
485 params->n_subport_profiles == 0 ||
486 params->n_max_subport_profiles == 0 ||
487 params->n_subport_profiles > params->n_max_subport_profiles) {
488 SCHED_LOG(ERR,
489 "%s: Incorrect value for subport profiles", __func__);
490 return -EINVAL;
491 }
492
493 for (i = 0; i < params->n_subport_profiles; i++) {
494 struct rte_sched_subport_profile_params *p =
495 params->subport_profiles + i;
496 int status;
497
498 status = subport_profile_check(p, params->rate);
499 if (status != 0) {
500 SCHED_LOG(ERR,
501 "%s: subport profile check failed(%d)",
502 __func__, status);
503 return -EINVAL;
504 }
505 }
506
507 /* n_pipes_per_subport: non-zero, power of 2 */
508 if (params->n_pipes_per_subport == 0 ||
509 !rte_is_power_of_2(params->n_pipes_per_subport)) {
510 SCHED_LOG(ERR,
511 "%s: Incorrect value for maximum pipes number", __func__);
512 return -EINVAL;
513 }
514
515 return 0;
516 }
517
518 static uint32_t
rte_sched_subport_get_array_base(struct rte_sched_subport_params * params,enum rte_sched_subport_array array)519 rte_sched_subport_get_array_base(struct rte_sched_subport_params *params,
520 enum rte_sched_subport_array array)
521 {
522 uint32_t n_pipes_per_subport = params->n_pipes_per_subport_enabled;
523 uint32_t n_subport_pipe_queues =
524 RTE_SCHED_QUEUES_PER_PIPE * n_pipes_per_subport;
525
526 uint32_t size_pipe = n_pipes_per_subport * sizeof(struct rte_sched_pipe);
527 uint32_t size_queue =
528 n_subport_pipe_queues * sizeof(struct rte_sched_queue);
529 uint32_t size_queue_extra
530 = n_subport_pipe_queues * sizeof(struct rte_sched_queue_extra);
531 uint32_t size_pipe_profiles = params->n_max_pipe_profiles *
532 sizeof(struct rte_sched_pipe_profile);
533 uint32_t size_bmp_array =
534 rte_bitmap_get_memory_footprint(n_subport_pipe_queues);
535 uint32_t size_per_pipe_queue_array, size_queue_array;
536
537 uint32_t base, i;
538
539 size_per_pipe_queue_array = 0;
540 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
541 if (i < RTE_SCHED_TRAFFIC_CLASS_BE)
542 size_per_pipe_queue_array +=
543 params->qsize[i] * sizeof(struct rte_mbuf *);
544 else
545 size_per_pipe_queue_array += RTE_SCHED_MAX_QUEUES_PER_TC *
546 params->qsize[i] * sizeof(struct rte_mbuf *);
547 }
548 size_queue_array = n_pipes_per_subport * size_per_pipe_queue_array;
549
550 base = 0;
551
552 if (array == e_RTE_SCHED_SUBPORT_ARRAY_PIPE)
553 return base;
554 base += RTE_CACHE_LINE_ROUNDUP(size_pipe);
555
556 if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE)
557 return base;
558 base += RTE_CACHE_LINE_ROUNDUP(size_queue);
559
560 if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA)
561 return base;
562 base += RTE_CACHE_LINE_ROUNDUP(size_queue_extra);
563
564 if (array == e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES)
565 return base;
566 base += RTE_CACHE_LINE_ROUNDUP(size_pipe_profiles);
567
568 if (array == e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY)
569 return base;
570 base += RTE_CACHE_LINE_ROUNDUP(size_bmp_array);
571
572 if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY)
573 return base;
574 base += RTE_CACHE_LINE_ROUNDUP(size_queue_array);
575
576 return base;
577 }
578
579 static void
rte_sched_subport_config_qsize(struct rte_sched_subport * subport)580 rte_sched_subport_config_qsize(struct rte_sched_subport *subport)
581 {
582 uint32_t i;
583
584 subport->qsize_add[0] = 0;
585
586 /* Strict priority traffic class */
587 for (i = 1; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
588 subport->qsize_add[i] = subport->qsize_add[i-1] + subport->qsize[i-1];
589
590 /* Best-effort traffic class */
591 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 1] =
592 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE] +
593 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
594 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 2] =
595 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 1] +
596 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
597 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 3] =
598 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 2] +
599 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
600
601 subport->qsize_sum = subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 3] +
602 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
603 }
604
605 static void
rte_sched_port_log_pipe_profile(struct rte_sched_subport * subport,uint32_t i)606 rte_sched_port_log_pipe_profile(struct rte_sched_subport *subport, uint32_t i)
607 {
608 struct rte_sched_pipe_profile *p = subport->pipe_profiles + i;
609
610 RTE_LOG(DEBUG, SCHED, "Low level config for pipe profile %u:\n"
611 " Token bucket: period = %"PRIu64", credits per period = %"PRIu64", size = %"PRIu64"\n"
612 " Traffic classes: period = %"PRIu64",\n"
613 " credits per period = [%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
614 ", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
615 ", %"PRIu64", %"PRIu64", %"PRIu64"]\n"
616 " Best-effort traffic class oversubscription: weight = %hhu\n"
617 " WRR cost: [%hhu, %hhu, %hhu, %hhu]\n",
618 i,
619
620 /* Token bucket */
621 p->tb_period,
622 p->tb_credits_per_period,
623 p->tb_size,
624
625 /* Traffic classes */
626 p->tc_period,
627 p->tc_credits_per_period[0],
628 p->tc_credits_per_period[1],
629 p->tc_credits_per_period[2],
630 p->tc_credits_per_period[3],
631 p->tc_credits_per_period[4],
632 p->tc_credits_per_period[5],
633 p->tc_credits_per_period[6],
634 p->tc_credits_per_period[7],
635 p->tc_credits_per_period[8],
636 p->tc_credits_per_period[9],
637 p->tc_credits_per_period[10],
638 p->tc_credits_per_period[11],
639 p->tc_credits_per_period[12],
640
641 /* Best-effort traffic class oversubscription */
642 p->tc_ov_weight,
643
644 /* WRR */
645 p->wrr_cost[0], p->wrr_cost[1], p->wrr_cost[2], p->wrr_cost[3]);
646 }
647
648 static void
rte_sched_port_log_subport_profile(struct rte_sched_port * port,uint32_t i)649 rte_sched_port_log_subport_profile(struct rte_sched_port *port, uint32_t i)
650 {
651 struct rte_sched_subport_profile *p = port->subport_profiles + i;
652
653 RTE_LOG(DEBUG, SCHED, "Low level config for subport profile %u:\n"
654 "Token bucket: period = %"PRIu64", credits per period = %"PRIu64","
655 "size = %"PRIu64"\n"
656 "Traffic classes: period = %"PRIu64",\n"
657 "credits per period = [%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
658 " %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
659 " %"PRIu64", %"PRIu64", %"PRIu64"]\n",
660 i,
661
662 /* Token bucket */
663 p->tb_period,
664 p->tb_credits_per_period,
665 p->tb_size,
666
667 /* Traffic classes */
668 p->tc_period,
669 p->tc_credits_per_period[0],
670 p->tc_credits_per_period[1],
671 p->tc_credits_per_period[2],
672 p->tc_credits_per_period[3],
673 p->tc_credits_per_period[4],
674 p->tc_credits_per_period[5],
675 p->tc_credits_per_period[6],
676 p->tc_credits_per_period[7],
677 p->tc_credits_per_period[8],
678 p->tc_credits_per_period[9],
679 p->tc_credits_per_period[10],
680 p->tc_credits_per_period[11],
681 p->tc_credits_per_period[12]);
682 }
683
684 static inline uint64_t
rte_sched_time_ms_to_bytes(uint64_t time_ms,uint64_t rate)685 rte_sched_time_ms_to_bytes(uint64_t time_ms, uint64_t rate)
686 {
687 uint64_t time = time_ms;
688
689 time = (time * rate) / 1000;
690
691 return time;
692 }
693
694 static void
rte_sched_pipe_profile_convert(struct rte_sched_subport * subport,struct rte_sched_pipe_params * src,struct rte_sched_pipe_profile * dst,uint64_t rate)695 rte_sched_pipe_profile_convert(struct rte_sched_subport *subport,
696 struct rte_sched_pipe_params *src,
697 struct rte_sched_pipe_profile *dst,
698 uint64_t rate)
699 {
700 uint32_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
701 uint32_t lcd1, lcd2, lcd;
702 uint32_t i;
703
704 /* Token Bucket */
705 if (src->tb_rate == rate) {
706 dst->tb_credits_per_period = 1;
707 dst->tb_period = 1;
708 } else {
709 double tb_rate = (double) src->tb_rate
710 / (double) rate;
711 double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
712
713 rte_approx_64(tb_rate, d, &dst->tb_credits_per_period,
714 &dst->tb_period);
715 }
716
717 dst->tb_size = src->tb_size;
718
719 /* Traffic Classes */
720 dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period,
721 rate);
722
723 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
724 if (subport->qsize[i])
725 dst->tc_credits_per_period[i]
726 = rte_sched_time_ms_to_bytes(src->tc_period,
727 src->tc_rate[i]);
728
729 dst->tc_ov_weight = src->tc_ov_weight;
730
731 /* WRR queues */
732 wrr_cost[0] = src->wrr_weights[0];
733 wrr_cost[1] = src->wrr_weights[1];
734 wrr_cost[2] = src->wrr_weights[2];
735 wrr_cost[3] = src->wrr_weights[3];
736
737 lcd1 = rte_get_lcd(wrr_cost[0], wrr_cost[1]);
738 lcd2 = rte_get_lcd(wrr_cost[2], wrr_cost[3]);
739 lcd = rte_get_lcd(lcd1, lcd2);
740
741 wrr_cost[0] = lcd / wrr_cost[0];
742 wrr_cost[1] = lcd / wrr_cost[1];
743 wrr_cost[2] = lcd / wrr_cost[2];
744 wrr_cost[3] = lcd / wrr_cost[3];
745
746 dst->wrr_cost[0] = (uint8_t) wrr_cost[0];
747 dst->wrr_cost[1] = (uint8_t) wrr_cost[1];
748 dst->wrr_cost[2] = (uint8_t) wrr_cost[2];
749 dst->wrr_cost[3] = (uint8_t) wrr_cost[3];
750 }
751
752 static void
rte_sched_subport_profile_convert(struct rte_sched_subport_profile_params * src,struct rte_sched_subport_profile * dst,uint64_t rate)753 rte_sched_subport_profile_convert(struct rte_sched_subport_profile_params *src,
754 struct rte_sched_subport_profile *dst,
755 uint64_t rate)
756 {
757 uint32_t i;
758
759 /* Token Bucket */
760 if (src->tb_rate == rate) {
761 dst->tb_credits_per_period = 1;
762 dst->tb_period = 1;
763 } else {
764 double tb_rate = (double) src->tb_rate
765 / (double) rate;
766 double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
767
768 rte_approx_64(tb_rate, d, &dst->tb_credits_per_period,
769 &dst->tb_period);
770 }
771
772 dst->tb_size = src->tb_size;
773
774 /* Traffic Classes */
775 dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period, rate);
776
777 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
778 dst->tc_credits_per_period[i]
779 = rte_sched_time_ms_to_bytes(src->tc_period,
780 src->tc_rate[i]);
781 }
782
783 static void
rte_sched_subport_config_pipe_profile_table(struct rte_sched_subport * subport,struct rte_sched_subport_params * params,uint64_t rate)784 rte_sched_subport_config_pipe_profile_table(struct rte_sched_subport *subport,
785 struct rte_sched_subport_params *params, uint64_t rate)
786 {
787 uint32_t i;
788
789 for (i = 0; i < subport->n_pipe_profiles; i++) {
790 struct rte_sched_pipe_params *src = params->pipe_profiles + i;
791 struct rte_sched_pipe_profile *dst = subport->pipe_profiles + i;
792
793 rte_sched_pipe_profile_convert(subport, src, dst, rate);
794 rte_sched_port_log_pipe_profile(subport, i);
795 }
796
797 subport->pipe_tc_be_rate_max = 0;
798 for (i = 0; i < subport->n_pipe_profiles; i++) {
799 struct rte_sched_pipe_params *src = params->pipe_profiles + i;
800 uint64_t pipe_tc_be_rate = src->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE];
801
802 if (subport->pipe_tc_be_rate_max < pipe_tc_be_rate)
803 subport->pipe_tc_be_rate_max = pipe_tc_be_rate;
804 }
805 }
806
807 static void
rte_sched_port_config_subport_profile_table(struct rte_sched_port * port,struct rte_sched_port_params * params,uint64_t rate)808 rte_sched_port_config_subport_profile_table(struct rte_sched_port *port,
809 struct rte_sched_port_params *params,
810 uint64_t rate)
811 {
812 uint32_t i;
813
814 for (i = 0; i < port->n_subport_profiles; i++) {
815 struct rte_sched_subport_profile_params *src
816 = params->subport_profiles + i;
817 struct rte_sched_subport_profile *dst
818 = port->subport_profiles + i;
819
820 rte_sched_subport_profile_convert(src, dst, rate);
821 rte_sched_port_log_subport_profile(port, i);
822 }
823 }
824
825 static int
rte_sched_subport_check_params(struct rte_sched_subport_params * params,uint32_t n_max_pipes_per_subport,uint64_t rate)826 rte_sched_subport_check_params(struct rte_sched_subport_params *params,
827 uint32_t n_max_pipes_per_subport,
828 uint64_t rate)
829 {
830 uint32_t i;
831
832 /* Check user parameters */
833 if (params == NULL) {
834 SCHED_LOG(ERR,
835 "%s: Incorrect value for parameter params", __func__);
836 return -EINVAL;
837 }
838
839 /* qsize: if non-zero, power of 2,
840 * no bigger than 32K (due to 16-bit read/write pointers)
841 */
842 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
843 uint16_t qsize = params->qsize[i];
844
845 if (qsize != 0 && !rte_is_power_of_2(qsize)) {
846 SCHED_LOG(ERR,
847 "%s: Incorrect value for qsize", __func__);
848 return -EINVAL;
849 }
850 }
851
852 if (params->qsize[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
853 SCHED_LOG(ERR, "%s: Incorrect qsize", __func__);
854 return -EINVAL;
855 }
856
857 /* n_pipes_per_subport: non-zero, power of 2 */
858 if (params->n_pipes_per_subport_enabled == 0 ||
859 params->n_pipes_per_subport_enabled > n_max_pipes_per_subport ||
860 !rte_is_power_of_2(params->n_pipes_per_subport_enabled)) {
861 SCHED_LOG(ERR,
862 "%s: Incorrect value for pipes number", __func__);
863 return -EINVAL;
864 }
865
866 /* pipe_profiles and n_pipe_profiles */
867 if (params->pipe_profiles == NULL ||
868 params->n_pipe_profiles == 0 ||
869 params->n_max_pipe_profiles == 0 ||
870 params->n_pipe_profiles > params->n_max_pipe_profiles) {
871 SCHED_LOG(ERR,
872 "%s: Incorrect value for pipe profiles", __func__);
873 return -EINVAL;
874 }
875
876 for (i = 0; i < params->n_pipe_profiles; i++) {
877 struct rte_sched_pipe_params *p = params->pipe_profiles + i;
878 int status;
879
880 status = pipe_profile_check(p, rate, ¶ms->qsize[0]);
881 if (status != 0) {
882 SCHED_LOG(ERR,
883 "%s: Pipe profile check failed(%d)", __func__, status);
884 return -EINVAL;
885 }
886 }
887
888 return 0;
889 }
890
891 uint32_t
rte_sched_port_get_memory_footprint(struct rte_sched_port_params * port_params,struct rte_sched_subport_params ** subport_params)892 rte_sched_port_get_memory_footprint(struct rte_sched_port_params *port_params,
893 struct rte_sched_subport_params **subport_params)
894 {
895 uint32_t size0 = 0, size1 = 0, i;
896 int status;
897
898 status = rte_sched_port_check_params(port_params);
899 if (status != 0) {
900 SCHED_LOG(ERR,
901 "%s: Port scheduler port params check failed (%d)",
902 __func__, status);
903
904 return 0;
905 }
906
907 for (i = 0; i < port_params->n_subports_per_port; i++) {
908 struct rte_sched_subport_params *sp = subport_params[i];
909
910 status = rte_sched_subport_check_params(sp,
911 port_params->n_pipes_per_subport,
912 port_params->rate);
913 if (status != 0) {
914 SCHED_LOG(ERR,
915 "%s: Port scheduler subport params check failed (%d)",
916 __func__, status);
917
918 return 0;
919 }
920 }
921
922 size0 = sizeof(struct rte_sched_port);
923
924 for (i = 0; i < port_params->n_subports_per_port; i++) {
925 struct rte_sched_subport_params *sp = subport_params[i];
926
927 size1 += rte_sched_subport_get_array_base(sp,
928 e_RTE_SCHED_SUBPORT_ARRAY_TOTAL);
929 }
930
931 return size0 + size1;
932 }
933
934 struct rte_sched_port *
rte_sched_port_config(struct rte_sched_port_params * params)935 rte_sched_port_config(struct rte_sched_port_params *params)
936 {
937 struct rte_sched_port *port = NULL;
938 uint32_t size0, size1, size2;
939 uint32_t cycles_per_byte;
940 uint32_t i, j;
941 int status;
942
943 status = rte_sched_port_check_params(params);
944 if (status != 0) {
945 SCHED_LOG(ERR,
946 "%s: Port scheduler params check failed (%d)",
947 __func__, status);
948 return NULL;
949 }
950
951 size0 = sizeof(struct rte_sched_port);
952 size1 = params->n_subports_per_port * sizeof(struct rte_sched_subport *);
953 size2 = params->n_max_subport_profiles *
954 sizeof(struct rte_sched_subport_profile);
955
956 /* Allocate memory to store the data structures */
957 port = rte_zmalloc_socket("qos_params", size0 + size1,
958 RTE_CACHE_LINE_SIZE, params->socket);
959 if (port == NULL) {
960 SCHED_LOG(ERR, "%s: Memory allocation fails", __func__);
961
962 return NULL;
963 }
964
965 /* Allocate memory to store the subport profile */
966 port->subport_profiles = rte_zmalloc_socket("subport_profile", size2,
967 RTE_CACHE_LINE_SIZE, params->socket);
968 if (port->subport_profiles == NULL) {
969 SCHED_LOG(ERR, "%s: Memory allocation fails", __func__);
970 rte_free(port);
971 return NULL;
972 }
973
974 /* User parameters */
975 port->n_subports_per_port = params->n_subports_per_port;
976 port->n_subport_profiles = params->n_subport_profiles;
977 port->n_max_subport_profiles = params->n_max_subport_profiles;
978 port->n_pipes_per_subport = params->n_pipes_per_subport;
979 port->n_pipes_per_subport_log2 =
980 rte_ctz32(params->n_pipes_per_subport);
981 port->socket = params->socket;
982
983 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
984 port->pipe_queue[i] = i;
985
986 for (i = 0, j = 0; i < RTE_SCHED_QUEUES_PER_PIPE; i++) {
987 port->pipe_tc[i] = j;
988
989 if (j < RTE_SCHED_TRAFFIC_CLASS_BE)
990 j++;
991 }
992
993 for (i = 0, j = 0; i < RTE_SCHED_QUEUES_PER_PIPE; i++) {
994 port->tc_queue[i] = j;
995
996 if (i >= RTE_SCHED_TRAFFIC_CLASS_BE)
997 j++;
998 }
999 port->rate = params->rate;
1000 port->mtu = params->mtu + params->frame_overhead;
1001 port->frame_overhead = params->frame_overhead;
1002
1003 /* Timing */
1004 port->time_cpu_cycles = rte_get_tsc_cycles();
1005 port->time_cpu_bytes = 0;
1006 port->time = 0;
1007
1008 /* Subport profile table */
1009 rte_sched_port_config_subport_profile_table(port, params, port->rate);
1010
1011 cycles_per_byte = (rte_get_tsc_hz() << RTE_SCHED_TIME_SHIFT)
1012 / params->rate;
1013 port->inv_cycles_per_byte = rte_reciprocal_value(cycles_per_byte);
1014 port->cycles_per_byte = cycles_per_byte;
1015
1016 /* Grinders */
1017 port->pkts_out = NULL;
1018 port->n_pkts_out = 0;
1019 port->subport_id = 0;
1020
1021 return port;
1022 }
1023
1024 static inline void
rte_sched_subport_free(struct rte_sched_port * port,struct rte_sched_subport * subport)1025 rte_sched_subport_free(struct rte_sched_port *port,
1026 struct rte_sched_subport *subport)
1027 {
1028 uint32_t n_subport_pipe_queues;
1029 uint32_t qindex;
1030
1031 if (subport == NULL)
1032 return;
1033
1034 n_subport_pipe_queues = rte_sched_subport_pipe_queues(subport);
1035
1036 /* Free enqueued mbufs */
1037 for (qindex = 0; qindex < n_subport_pipe_queues; qindex++) {
1038 struct rte_mbuf **mbufs =
1039 rte_sched_subport_pipe_qbase(subport, qindex);
1040 uint16_t qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
1041 if (qsize != 0) {
1042 struct rte_sched_queue *queue = subport->queue + qindex;
1043 uint16_t qr = queue->qr & (qsize - 1);
1044 uint16_t qw = queue->qw & (qsize - 1);
1045
1046 for (; qr != qw; qr = (qr + 1) & (qsize - 1))
1047 rte_pktmbuf_free(mbufs[qr]);
1048 }
1049 }
1050
1051 rte_free(subport);
1052 }
1053
1054 void
rte_sched_port_free(struct rte_sched_port * port)1055 rte_sched_port_free(struct rte_sched_port *port)
1056 {
1057 uint32_t i;
1058
1059 /* Check user parameters */
1060 if (port == NULL)
1061 return;
1062
1063 for (i = 0; i < port->n_subports_per_port; i++)
1064 rte_sched_subport_free(port, port->subports[i]);
1065
1066 rte_free(port->subport_profiles);
1067 rte_free(port);
1068 }
1069
1070 static void
rte_sched_free_memory(struct rte_sched_port * port,uint32_t n_subports)1071 rte_sched_free_memory(struct rte_sched_port *port, uint32_t n_subports)
1072 {
1073 uint32_t i;
1074
1075 for (i = 0; i < n_subports; i++) {
1076 struct rte_sched_subport *subport = port->subports[i];
1077
1078 rte_sched_subport_free(port, subport);
1079 }
1080
1081 rte_free(port->subport_profiles);
1082 rte_free(port);
1083 }
1084
1085 static int
rte_sched_red_config(struct rte_sched_port * port,struct rte_sched_subport * s,struct rte_sched_subport_params * params,uint32_t n_subports)1086 rte_sched_red_config(struct rte_sched_port *port,
1087 struct rte_sched_subport *s,
1088 struct rte_sched_subport_params *params,
1089 uint32_t n_subports)
1090 {
1091 uint32_t i;
1092
1093 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
1094
1095 uint32_t j;
1096
1097 for (j = 0; j < RTE_COLORS; j++) {
1098 /* if min/max are both zero, then RED is disabled */
1099 if ((params->cman_params->red_params[i][j].min_th |
1100 params->cman_params->red_params[i][j].max_th) == 0) {
1101 continue;
1102 }
1103
1104 if (rte_red_config_init(&s->red_config[i][j],
1105 params->cman_params->red_params[i][j].wq_log2,
1106 params->cman_params->red_params[i][j].min_th,
1107 params->cman_params->red_params[i][j].max_th,
1108 params->cman_params->red_params[i][j].maxp_inv) != 0) {
1109 rte_sched_free_memory(port, n_subports);
1110
1111 SCHED_LOG(NOTICE,
1112 "%s: RED configuration init fails", __func__);
1113 return -EINVAL;
1114 }
1115 }
1116 }
1117 s->cman = RTE_SCHED_CMAN_RED;
1118 return 0;
1119 }
1120
1121 static int
rte_sched_pie_config(struct rte_sched_port * port,struct rte_sched_subport * s,struct rte_sched_subport_params * params,uint32_t n_subports)1122 rte_sched_pie_config(struct rte_sched_port *port,
1123 struct rte_sched_subport *s,
1124 struct rte_sched_subport_params *params,
1125 uint32_t n_subports)
1126 {
1127 uint32_t i;
1128
1129 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
1130 if (params->cman_params->pie_params[i].tailq_th > params->qsize[i]) {
1131 SCHED_LOG(NOTICE,
1132 "%s: PIE tailq threshold incorrect", __func__);
1133 return -EINVAL;
1134 }
1135
1136 if (rte_pie_config_init(&s->pie_config[i],
1137 params->cman_params->pie_params[i].qdelay_ref,
1138 params->cman_params->pie_params[i].dp_update_interval,
1139 params->cman_params->pie_params[i].max_burst,
1140 params->cman_params->pie_params[i].tailq_th) != 0) {
1141 rte_sched_free_memory(port, n_subports);
1142
1143 SCHED_LOG(NOTICE,
1144 "%s: PIE configuration init fails", __func__);
1145 return -EINVAL;
1146 }
1147 }
1148 s->cman = RTE_SCHED_CMAN_PIE;
1149 return 0;
1150 }
1151
1152 static int
rte_sched_cman_config(struct rte_sched_port * port,struct rte_sched_subport * s,struct rte_sched_subport_params * params,uint32_t n_subports)1153 rte_sched_cman_config(struct rte_sched_port *port,
1154 struct rte_sched_subport *s,
1155 struct rte_sched_subport_params *params,
1156 uint32_t n_subports)
1157 {
1158 if (params->cman_params->cman_mode == RTE_SCHED_CMAN_RED)
1159 return rte_sched_red_config(port, s, params, n_subports);
1160
1161 else if (params->cman_params->cman_mode == RTE_SCHED_CMAN_PIE)
1162 return rte_sched_pie_config(port, s, params, n_subports);
1163
1164 return -EINVAL;
1165 }
1166
1167 int
rte_sched_subport_tc_ov_config(struct rte_sched_port * port,uint32_t subport_id,bool tc_ov_enable)1168 rte_sched_subport_tc_ov_config(struct rte_sched_port *port,
1169 uint32_t subport_id,
1170 bool tc_ov_enable)
1171 {
1172 struct rte_sched_subport *s;
1173
1174 if (port == NULL) {
1175 SCHED_LOG(ERR,
1176 "%s: Incorrect value for parameter port", __func__);
1177 return -EINVAL;
1178 }
1179
1180 if (subport_id >= port->n_subports_per_port) {
1181 SCHED_LOG(ERR,
1182 "%s: Incorrect value for parameter subport id", __func__);
1183 return -EINVAL;
1184 }
1185
1186 s = port->subports[subport_id];
1187 s->tc_ov_enabled = tc_ov_enable ? 1 : 0;
1188
1189 return 0;
1190 }
1191
1192 int
rte_sched_subport_config(struct rte_sched_port * port,uint32_t subport_id,struct rte_sched_subport_params * params,uint32_t subport_profile_id)1193 rte_sched_subport_config(struct rte_sched_port *port,
1194 uint32_t subport_id,
1195 struct rte_sched_subport_params *params,
1196 uint32_t subport_profile_id)
1197 {
1198 struct rte_sched_subport *s = NULL;
1199 uint32_t n_subports = subport_id;
1200 struct rte_sched_subport_profile *profile;
1201 uint32_t n_subport_pipe_queues, i;
1202 uint32_t size0, size1, bmp_mem_size;
1203 int status;
1204 int ret;
1205
1206 /* Check user parameters */
1207 if (port == NULL) {
1208 SCHED_LOG(ERR,
1209 "%s: Incorrect value for parameter port", __func__);
1210 return 0;
1211 }
1212
1213 if (subport_id >= port->n_subports_per_port) {
1214 SCHED_LOG(ERR,
1215 "%s: Incorrect value for subport id", __func__);
1216 ret = -EINVAL;
1217 goto out;
1218 }
1219
1220 if (subport_profile_id >= port->n_max_subport_profiles) {
1221 SCHED_LOG(ERR, "%s: "
1222 "Number of subport profile exceeds the max limit",
1223 __func__);
1224 ret = -EINVAL;
1225 goto out;
1226 }
1227
1228 /** Memory is allocated only on first invocation of the api for a
1229 * given subport. Subsequent invocation on same subport will just
1230 * update subport bandwidth parameter.
1231 */
1232 if (port->subports[subport_id] == NULL) {
1233
1234 status = rte_sched_subport_check_params(params,
1235 port->n_pipes_per_subport,
1236 port->rate);
1237 if (status != 0) {
1238 SCHED_LOG(NOTICE,
1239 "%s: Port scheduler params check failed (%d)",
1240 __func__, status);
1241 ret = -EINVAL;
1242 goto out;
1243 }
1244
1245 /* Determine the amount of memory to allocate */
1246 size0 = sizeof(struct rte_sched_subport);
1247 size1 = rte_sched_subport_get_array_base(params,
1248 e_RTE_SCHED_SUBPORT_ARRAY_TOTAL);
1249
1250 /* Allocate memory to store the data structures */
1251 s = rte_zmalloc_socket("subport_params", size0 + size1,
1252 RTE_CACHE_LINE_SIZE, port->socket);
1253 if (s == NULL) {
1254 SCHED_LOG(ERR,
1255 "%s: Memory allocation fails", __func__);
1256 ret = -ENOMEM;
1257 goto out;
1258 }
1259
1260 n_subports++;
1261
1262 /* Port */
1263 port->subports[subport_id] = s;
1264
1265 s->tb_time = port->time;
1266
1267 /* compile time checks */
1268 RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS == 0);
1269 RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS &
1270 (RTE_SCHED_PORT_N_GRINDERS - 1));
1271
1272 /* User parameters */
1273 s->n_pipes_per_subport_enabled =
1274 params->n_pipes_per_subport_enabled;
1275 memcpy(s->qsize, params->qsize, sizeof(params->qsize));
1276 s->n_pipe_profiles = params->n_pipe_profiles;
1277 s->n_max_pipe_profiles = params->n_max_pipe_profiles;
1278
1279 /* TC oversubscription is enabled by default */
1280 s->tc_ov_enabled = 1;
1281
1282 if (params->cman_params != NULL) {
1283 s->cman_enabled = true;
1284 status = rte_sched_cman_config(port, s, params, n_subports);
1285 if (status) {
1286 SCHED_LOG(NOTICE,
1287 "%s: CMAN configuration fails", __func__);
1288 return status;
1289 }
1290 } else {
1291 s->cman_enabled = false;
1292 }
1293
1294 /* Scheduling loop detection */
1295 s->pipe_loop = RTE_SCHED_PIPE_INVALID;
1296 s->pipe_exhaustion = 0;
1297
1298 /* Grinders */
1299 s->busy_grinders = 0;
1300
1301 /* Queue base calculation */
1302 rte_sched_subport_config_qsize(s);
1303
1304 /* Large data structures */
1305 s->pipe = (struct rte_sched_pipe *)
1306 (s->memory + rte_sched_subport_get_array_base(params,
1307 e_RTE_SCHED_SUBPORT_ARRAY_PIPE));
1308 s->queue = (struct rte_sched_queue *)
1309 (s->memory + rte_sched_subport_get_array_base(params,
1310 e_RTE_SCHED_SUBPORT_ARRAY_QUEUE));
1311 s->queue_extra = (struct rte_sched_queue_extra *)
1312 (s->memory + rte_sched_subport_get_array_base(params,
1313 e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA));
1314 s->pipe_profiles = (struct rte_sched_pipe_profile *)
1315 (s->memory + rte_sched_subport_get_array_base(params,
1316 e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES));
1317 s->bmp_array = s->memory + rte_sched_subport_get_array_base(
1318 params, e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY);
1319 s->queue_array = (struct rte_mbuf **)
1320 (s->memory + rte_sched_subport_get_array_base(params,
1321 e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY));
1322
1323 /* Pipe profile table */
1324 rte_sched_subport_config_pipe_profile_table(s, params,
1325 port->rate);
1326
1327 /* Bitmap */
1328 n_subport_pipe_queues = rte_sched_subport_pipe_queues(s);
1329 bmp_mem_size = rte_bitmap_get_memory_footprint(
1330 n_subport_pipe_queues);
1331 s->bmp = rte_bitmap_init(n_subport_pipe_queues, s->bmp_array,
1332 bmp_mem_size);
1333 if (s->bmp == NULL) {
1334 SCHED_LOG(ERR,
1335 "%s: Subport bitmap init error", __func__);
1336 ret = -EINVAL;
1337 goto out;
1338 }
1339
1340 for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++)
1341 s->grinder_base_bmp_pos[i] = RTE_SCHED_PIPE_INVALID;
1342
1343 /* TC oversubscription */
1344 s->tc_ov_wm_min = port->mtu;
1345 s->tc_ov_period_id = 0;
1346 s->tc_ov = 0;
1347 s->tc_ov_n = 0;
1348 s->tc_ov_rate = 0;
1349 }
1350
1351 {
1352 /* update subport parameters from subport profile table*/
1353 profile = port->subport_profiles + subport_profile_id;
1354
1355 s = port->subports[subport_id];
1356
1357 s->tb_credits = profile->tb_size / 2;
1358
1359 s->tc_time = port->time + profile->tc_period;
1360
1361 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
1362 if (s->qsize[i])
1363 s->tc_credits[i] =
1364 profile->tc_credits_per_period[i];
1365 else
1366 profile->tc_credits_per_period[i] = 0;
1367
1368 s->tc_ov_wm_max = rte_sched_time_ms_to_bytes(profile->tc_period,
1369 s->pipe_tc_be_rate_max);
1370 s->tc_ov_wm = s->tc_ov_wm_max;
1371 s->profile = subport_profile_id;
1372
1373 }
1374
1375 rte_sched_port_log_subport_profile(port, subport_profile_id);
1376
1377 return 0;
1378
1379 out:
1380 rte_sched_free_memory(port, n_subports);
1381
1382 return ret;
1383 }
1384
1385 int
rte_sched_pipe_config(struct rte_sched_port * port,uint32_t subport_id,uint32_t pipe_id,int32_t pipe_profile)1386 rte_sched_pipe_config(struct rte_sched_port *port,
1387 uint32_t subport_id,
1388 uint32_t pipe_id,
1389 int32_t pipe_profile)
1390 {
1391 struct rte_sched_subport *s;
1392 struct rte_sched_subport_profile *sp;
1393 struct rte_sched_pipe *p;
1394 struct rte_sched_pipe_profile *params;
1395 uint32_t n_subports = subport_id + 1;
1396 uint32_t deactivate, profile, i;
1397 int ret;
1398
1399 /* Check user parameters */
1400 profile = (uint32_t) pipe_profile;
1401 deactivate = (pipe_profile < 0);
1402
1403 if (port == NULL) {
1404 SCHED_LOG(ERR,
1405 "%s: Incorrect value for parameter port", __func__);
1406 return -EINVAL;
1407 }
1408
1409 if (subport_id >= port->n_subports_per_port) {
1410 SCHED_LOG(ERR,
1411 "%s: Incorrect value for parameter subport id", __func__);
1412 ret = -EINVAL;
1413 goto out;
1414 }
1415
1416 s = port->subports[subport_id];
1417 if (pipe_id >= s->n_pipes_per_subport_enabled) {
1418 SCHED_LOG(ERR,
1419 "%s: Incorrect value for parameter pipe id", __func__);
1420 ret = -EINVAL;
1421 goto out;
1422 }
1423
1424 if (!deactivate && profile >= s->n_pipe_profiles) {
1425 SCHED_LOG(ERR,
1426 "%s: Incorrect value for parameter pipe profile", __func__);
1427 ret = -EINVAL;
1428 goto out;
1429 }
1430
1431 sp = port->subport_profiles + s->profile;
1432 /* Handle the case when pipe already has a valid configuration */
1433 p = s->pipe + pipe_id;
1434 if (p->tb_time) {
1435 params = s->pipe_profiles + p->profile;
1436
1437 double subport_tc_be_rate =
1438 (double)sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1439 / (double) sp->tc_period;
1440 double pipe_tc_be_rate =
1441 (double) params->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1442 / (double) params->tc_period;
1443 uint32_t tc_be_ov = s->tc_ov;
1444
1445 /* Unplug pipe from its subport */
1446 s->tc_ov_n -= params->tc_ov_weight;
1447 s->tc_ov_rate -= pipe_tc_be_rate;
1448 s->tc_ov = s->tc_ov_rate > subport_tc_be_rate;
1449
1450 if (s->tc_ov != tc_be_ov) {
1451 SCHED_LOG(DEBUG,
1452 "Subport %u Best-effort TC oversubscription is OFF (%.4lf >= %.4lf)",
1453 subport_id, subport_tc_be_rate, s->tc_ov_rate);
1454 }
1455
1456 /* Reset the pipe */
1457 memset(p, 0, sizeof(struct rte_sched_pipe));
1458 }
1459
1460 if (deactivate)
1461 return 0;
1462
1463 /* Apply the new pipe configuration */
1464 p->profile = profile;
1465 params = s->pipe_profiles + p->profile;
1466
1467 /* Token Bucket (TB) */
1468 p->tb_time = port->time;
1469 p->tb_credits = params->tb_size / 2;
1470
1471 /* Traffic Classes (TCs) */
1472 p->tc_time = port->time + params->tc_period;
1473
1474 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
1475 if (s->qsize[i])
1476 p->tc_credits[i] = params->tc_credits_per_period[i];
1477
1478 {
1479 /* Subport best effort tc oversubscription */
1480 double subport_tc_be_rate =
1481 (double)sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1482 / (double) sp->tc_period;
1483 double pipe_tc_be_rate =
1484 (double) params->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1485 / (double) params->tc_period;
1486 uint32_t tc_be_ov = s->tc_ov;
1487
1488 s->tc_ov_n += params->tc_ov_weight;
1489 s->tc_ov_rate += pipe_tc_be_rate;
1490 s->tc_ov = s->tc_ov_rate > subport_tc_be_rate;
1491
1492 if (s->tc_ov != tc_be_ov) {
1493 SCHED_LOG(DEBUG,
1494 "Subport %u Best effort TC oversubscription is ON (%.4lf < %.4lf)",
1495 subport_id, subport_tc_be_rate, s->tc_ov_rate);
1496 }
1497 p->tc_ov_period_id = s->tc_ov_period_id;
1498 p->tc_ov_credits = s->tc_ov_wm;
1499 }
1500
1501 return 0;
1502
1503 out:
1504 rte_sched_free_memory(port, n_subports);
1505
1506 return ret;
1507 }
1508
1509 int
rte_sched_subport_pipe_profile_add(struct rte_sched_port * port,uint32_t subport_id,struct rte_sched_pipe_params * params,uint32_t * pipe_profile_id)1510 rte_sched_subport_pipe_profile_add(struct rte_sched_port *port,
1511 uint32_t subport_id,
1512 struct rte_sched_pipe_params *params,
1513 uint32_t *pipe_profile_id)
1514 {
1515 struct rte_sched_subport *s;
1516 struct rte_sched_pipe_profile *pp;
1517 uint32_t i;
1518 int status;
1519
1520 /* Port */
1521 if (port == NULL) {
1522 SCHED_LOG(ERR,
1523 "%s: Incorrect value for parameter port", __func__);
1524 return -EINVAL;
1525 }
1526
1527 /* Subport id not exceeds the max limit */
1528 if (subport_id > port->n_subports_per_port) {
1529 SCHED_LOG(ERR,
1530 "%s: Incorrect value for subport id", __func__);
1531 return -EINVAL;
1532 }
1533
1534 s = port->subports[subport_id];
1535
1536 /* Pipe profiles exceeds the max limit */
1537 if (s->n_pipe_profiles >= s->n_max_pipe_profiles) {
1538 SCHED_LOG(ERR,
1539 "%s: Number of pipe profiles exceeds the max limit", __func__);
1540 return -EINVAL;
1541 }
1542
1543 /* Pipe params */
1544 status = pipe_profile_check(params, port->rate, &s->qsize[0]);
1545 if (status != 0) {
1546 SCHED_LOG(ERR,
1547 "%s: Pipe profile check failed(%d)", __func__, status);
1548 return -EINVAL;
1549 }
1550
1551 pp = &s->pipe_profiles[s->n_pipe_profiles];
1552 rte_sched_pipe_profile_convert(s, params, pp, port->rate);
1553
1554 /* Pipe profile should not exists */
1555 for (i = 0; i < s->n_pipe_profiles; i++)
1556 if (memcmp(s->pipe_profiles + i, pp, sizeof(*pp)) == 0) {
1557 SCHED_LOG(ERR,
1558 "%s: Pipe profile exists", __func__);
1559 return -EINVAL;
1560 }
1561
1562 /* Pipe profile commit */
1563 *pipe_profile_id = s->n_pipe_profiles;
1564 s->n_pipe_profiles++;
1565
1566 if (s->pipe_tc_be_rate_max < params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE])
1567 s->pipe_tc_be_rate_max = params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE];
1568
1569 rte_sched_port_log_pipe_profile(s, *pipe_profile_id);
1570
1571 return 0;
1572 }
1573
1574 int
rte_sched_port_subport_profile_add(struct rte_sched_port * port,struct rte_sched_subport_profile_params * params,uint32_t * subport_profile_id)1575 rte_sched_port_subport_profile_add(struct rte_sched_port *port,
1576 struct rte_sched_subport_profile_params *params,
1577 uint32_t *subport_profile_id)
1578 {
1579 int status;
1580 uint32_t i;
1581 struct rte_sched_subport_profile *dst;
1582
1583 /* Port */
1584 if (port == NULL) {
1585 SCHED_LOG(ERR, "%s: "
1586 "Incorrect value for parameter port", __func__);
1587 return -EINVAL;
1588 }
1589
1590 if (params == NULL) {
1591 SCHED_LOG(ERR, "%s: "
1592 "Incorrect value for parameter profile", __func__);
1593 return -EINVAL;
1594 }
1595
1596 if (subport_profile_id == NULL) {
1597 SCHED_LOG(ERR, "%s: "
1598 "Incorrect value for parameter subport_profile_id",
1599 __func__);
1600 return -EINVAL;
1601 }
1602
1603 dst = port->subport_profiles + port->n_subport_profiles;
1604
1605 /* Subport profiles exceeds the max limit */
1606 if (port->n_subport_profiles >= port->n_max_subport_profiles) {
1607 SCHED_LOG(ERR, "%s: "
1608 "Number of subport profiles exceeds the max limit",
1609 __func__);
1610 return -EINVAL;
1611 }
1612
1613 status = subport_profile_check(params, port->rate);
1614 if (status != 0) {
1615 SCHED_LOG(ERR,
1616 "%s: subport profile check failed(%d)", __func__, status);
1617 return -EINVAL;
1618 }
1619
1620 rte_sched_subport_profile_convert(params, dst, port->rate);
1621
1622 /* Subport profile should not exists */
1623 for (i = 0; i < port->n_subport_profiles; i++)
1624 if (memcmp(port->subport_profiles + i,
1625 dst, sizeof(*dst)) == 0) {
1626 SCHED_LOG(ERR,
1627 "%s: subport profile exists", __func__);
1628 return -EINVAL;
1629 }
1630
1631 /* Subport profile commit */
1632 *subport_profile_id = port->n_subport_profiles;
1633 port->n_subport_profiles++;
1634
1635 rte_sched_port_log_subport_profile(port, *subport_profile_id);
1636
1637 return 0;
1638 }
1639
1640 static inline uint32_t
rte_sched_port_qindex(struct rte_sched_port * port,uint32_t subport,uint32_t pipe,uint32_t traffic_class,uint32_t queue)1641 rte_sched_port_qindex(struct rte_sched_port *port,
1642 uint32_t subport,
1643 uint32_t pipe,
1644 uint32_t traffic_class,
1645 uint32_t queue)
1646 {
1647 return ((subport & (port->n_subports_per_port - 1)) <<
1648 (port->n_pipes_per_subport_log2 + 4)) |
1649 ((pipe &
1650 (port->subports[subport]->n_pipes_per_subport_enabled - 1)) << 4) |
1651 ((rte_sched_port_pipe_queue(port, traffic_class) + queue) &
1652 (RTE_SCHED_QUEUES_PER_PIPE - 1));
1653 }
1654
1655 void
rte_sched_port_pkt_write(struct rte_sched_port * port,struct rte_mbuf * pkt,uint32_t subport,uint32_t pipe,uint32_t traffic_class,uint32_t queue,enum rte_color color)1656 rte_sched_port_pkt_write(struct rte_sched_port *port,
1657 struct rte_mbuf *pkt,
1658 uint32_t subport, uint32_t pipe,
1659 uint32_t traffic_class,
1660 uint32_t queue, enum rte_color color)
1661 {
1662 uint32_t queue_id =
1663 rte_sched_port_qindex(port, subport, pipe, traffic_class, queue);
1664
1665 rte_mbuf_sched_set(pkt, queue_id, traffic_class, (uint8_t)color);
1666 }
1667
1668 void
rte_sched_port_pkt_read_tree_path(struct rte_sched_port * port,const struct rte_mbuf * pkt,uint32_t * subport,uint32_t * pipe,uint32_t * traffic_class,uint32_t * queue)1669 rte_sched_port_pkt_read_tree_path(struct rte_sched_port *port,
1670 const struct rte_mbuf *pkt,
1671 uint32_t *subport, uint32_t *pipe,
1672 uint32_t *traffic_class, uint32_t *queue)
1673 {
1674 uint32_t queue_id = rte_mbuf_sched_queue_get(pkt);
1675
1676 *subport = queue_id >> (port->n_pipes_per_subport_log2 + 4);
1677 *pipe = (queue_id >> 4) &
1678 (port->subports[*subport]->n_pipes_per_subport_enabled - 1);
1679 *traffic_class = rte_sched_port_pipe_tc(port, queue_id);
1680 *queue = rte_sched_port_tc_queue(port, queue_id);
1681 }
1682
1683 enum rte_color
rte_sched_port_pkt_read_color(const struct rte_mbuf * pkt)1684 rte_sched_port_pkt_read_color(const struct rte_mbuf *pkt)
1685 {
1686 return (enum rte_color)rte_mbuf_sched_color_get(pkt);
1687 }
1688
1689 int
rte_sched_subport_read_stats(struct rte_sched_port * port,uint32_t subport_id,struct rte_sched_subport_stats * stats,uint32_t * tc_ov)1690 rte_sched_subport_read_stats(struct rte_sched_port *port,
1691 uint32_t subport_id,
1692 struct rte_sched_subport_stats *stats,
1693 uint32_t *tc_ov)
1694 {
1695 struct rte_sched_subport *s;
1696
1697 /* Check user parameters */
1698 if (port == NULL) {
1699 SCHED_LOG(ERR,
1700 "%s: Incorrect value for parameter port", __func__);
1701 return -EINVAL;
1702 }
1703
1704 if (subport_id >= port->n_subports_per_port) {
1705 SCHED_LOG(ERR,
1706 "%s: Incorrect value for subport id", __func__);
1707 return -EINVAL;
1708 }
1709
1710 if (stats == NULL) {
1711 SCHED_LOG(ERR,
1712 "%s: Incorrect value for parameter stats", __func__);
1713 return -EINVAL;
1714 }
1715
1716 if (tc_ov == NULL) {
1717 SCHED_LOG(ERR,
1718 "%s: Incorrect value for tc_ov", __func__);
1719 return -EINVAL;
1720 }
1721
1722 s = port->subports[subport_id];
1723
1724 /* Copy subport stats and clear */
1725 memcpy(stats, &s->stats, sizeof(struct rte_sched_subport_stats));
1726 memset(&s->stats, 0, sizeof(struct rte_sched_subport_stats));
1727
1728 /* Subport TC oversubscription status */
1729 *tc_ov = s->tc_ov;
1730
1731 return 0;
1732 }
1733
1734 int
rte_sched_queue_read_stats(struct rte_sched_port * port,uint32_t queue_id,struct rte_sched_queue_stats * stats,uint16_t * qlen)1735 rte_sched_queue_read_stats(struct rte_sched_port *port,
1736 uint32_t queue_id,
1737 struct rte_sched_queue_stats *stats,
1738 uint16_t *qlen)
1739 {
1740 struct rte_sched_subport *s;
1741 struct rte_sched_queue *q;
1742 struct rte_sched_queue_extra *qe;
1743 uint32_t subport_id, subport_qmask, subport_qindex;
1744
1745 /* Check user parameters */
1746 if (port == NULL) {
1747 SCHED_LOG(ERR,
1748 "%s: Incorrect value for parameter port", __func__);
1749 return -EINVAL;
1750 }
1751
1752 if (queue_id >= rte_sched_port_queues_per_port(port)) {
1753 SCHED_LOG(ERR,
1754 "%s: Incorrect value for queue id", __func__);
1755 return -EINVAL;
1756 }
1757
1758 if (stats == NULL) {
1759 SCHED_LOG(ERR,
1760 "%s: Incorrect value for parameter stats", __func__);
1761 return -EINVAL;
1762 }
1763
1764 if (qlen == NULL) {
1765 SCHED_LOG(ERR,
1766 "%s: Incorrect value for parameter qlen", __func__);
1767 return -EINVAL;
1768 }
1769 subport_qmask = port->n_pipes_per_subport_log2 + 4;
1770 subport_id = (queue_id >> subport_qmask) & (port->n_subports_per_port - 1);
1771
1772 s = port->subports[subport_id];
1773 subport_qindex = ((1 << subport_qmask) - 1) & queue_id;
1774 q = s->queue + subport_qindex;
1775 qe = s->queue_extra + subport_qindex;
1776
1777 /* Copy queue stats and clear */
1778 memcpy(stats, &qe->stats, sizeof(struct rte_sched_queue_stats));
1779 memset(&qe->stats, 0, sizeof(struct rte_sched_queue_stats));
1780
1781 /* Queue length */
1782 *qlen = q->qw - q->qr;
1783
1784 return 0;
1785 }
1786
1787 #ifdef RTE_SCHED_DEBUG
1788
1789 static inline int
rte_sched_port_queue_is_empty(struct rte_sched_subport * subport,uint32_t qindex)1790 rte_sched_port_queue_is_empty(struct rte_sched_subport *subport,
1791 uint32_t qindex)
1792 {
1793 struct rte_sched_queue *queue = subport->queue + qindex;
1794
1795 return queue->qr == queue->qw;
1796 }
1797
1798 #endif /* RTE_SCHED_DEBUG */
1799
1800 static inline void
rte_sched_port_update_subport_stats(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t qindex,struct rte_mbuf * pkt)1801 rte_sched_port_update_subport_stats(struct rte_sched_port *port,
1802 struct rte_sched_subport *subport,
1803 uint32_t qindex,
1804 struct rte_mbuf *pkt)
1805 {
1806 uint32_t tc_index = rte_sched_port_pipe_tc(port, qindex);
1807 uint32_t pkt_len = pkt->pkt_len;
1808
1809 subport->stats.n_pkts_tc[tc_index] += 1;
1810 subport->stats.n_bytes_tc[tc_index] += pkt_len;
1811 }
1812
1813 static inline void
rte_sched_port_update_subport_stats_on_drop(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t qindex,struct rte_mbuf * pkt,uint32_t n_pkts_cman_dropped)1814 rte_sched_port_update_subport_stats_on_drop(struct rte_sched_port *port,
1815 struct rte_sched_subport *subport,
1816 uint32_t qindex,
1817 struct rte_mbuf *pkt,
1818 uint32_t n_pkts_cman_dropped)
1819 {
1820 uint32_t tc_index = rte_sched_port_pipe_tc(port, qindex);
1821 uint32_t pkt_len = pkt->pkt_len;
1822
1823 subport->stats.n_pkts_tc_dropped[tc_index] += 1;
1824 subport->stats.n_bytes_tc_dropped[tc_index] += pkt_len;
1825 subport->stats.n_pkts_cman_dropped[tc_index] += n_pkts_cman_dropped;
1826 }
1827
1828 static inline void
rte_sched_port_update_queue_stats(struct rte_sched_subport * subport,uint32_t qindex,struct rte_mbuf * pkt)1829 rte_sched_port_update_queue_stats(struct rte_sched_subport *subport,
1830 uint32_t qindex,
1831 struct rte_mbuf *pkt)
1832 {
1833 struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
1834 uint32_t pkt_len = pkt->pkt_len;
1835
1836 qe->stats.n_pkts += 1;
1837 qe->stats.n_bytes += pkt_len;
1838 }
1839
1840 static inline void
rte_sched_port_update_queue_stats_on_drop(struct rte_sched_subport * subport,uint32_t qindex,struct rte_mbuf * pkt,uint32_t n_pkts_cman_dropped)1841 rte_sched_port_update_queue_stats_on_drop(struct rte_sched_subport *subport,
1842 uint32_t qindex,
1843 struct rte_mbuf *pkt,
1844 uint32_t n_pkts_cman_dropped)
1845 {
1846 struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
1847 uint32_t pkt_len = pkt->pkt_len;
1848
1849 qe->stats.n_pkts_dropped += 1;
1850 qe->stats.n_bytes_dropped += pkt_len;
1851 if (subport->cman_enabled)
1852 qe->stats.n_pkts_cman_dropped += n_pkts_cman_dropped;
1853 }
1854
1855 static inline int
rte_sched_port_cman_drop(struct rte_sched_port * port,struct rte_sched_subport * subport,struct rte_mbuf * pkt,uint32_t qindex,uint16_t qlen)1856 rte_sched_port_cman_drop(struct rte_sched_port *port,
1857 struct rte_sched_subport *subport,
1858 struct rte_mbuf *pkt,
1859 uint32_t qindex,
1860 uint16_t qlen)
1861 {
1862 if (!subport->cman_enabled)
1863 return 0;
1864
1865 struct rte_sched_queue_extra *qe;
1866 uint32_t tc_index;
1867
1868 tc_index = rte_sched_port_pipe_tc(port, qindex);
1869 qe = subport->queue_extra + qindex;
1870
1871 /* RED */
1872 if (subport->cman == RTE_SCHED_CMAN_RED) {
1873 struct rte_red_config *red_cfg;
1874 struct rte_red *red;
1875 enum rte_color color;
1876
1877 color = rte_sched_port_pkt_read_color(pkt);
1878 red_cfg = &subport->red_config[tc_index][color];
1879
1880 if ((red_cfg->min_th | red_cfg->max_th) == 0)
1881 return 0;
1882
1883 red = &qe->red;
1884
1885 return rte_red_enqueue(red_cfg, red, qlen, port->time);
1886 }
1887
1888 /* PIE */
1889 struct rte_pie_config *pie_cfg = &subport->pie_config[tc_index];
1890 struct rte_pie *pie = &qe->pie;
1891
1892 return rte_pie_enqueue(pie_cfg, pie, qlen, pkt->pkt_len, port->time_cpu_cycles);
1893 }
1894
1895 static inline void
rte_sched_port_red_set_queue_empty_timestamp(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t qindex)1896 rte_sched_port_red_set_queue_empty_timestamp(struct rte_sched_port *port,
1897 struct rte_sched_subport *subport, uint32_t qindex)
1898 {
1899 if (subport->cman_enabled && subport->cman == RTE_SCHED_CMAN_RED) {
1900 struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
1901 struct rte_red *red = &qe->red;
1902
1903 rte_red_mark_queue_empty(red, port->time);
1904 }
1905 }
1906
1907 static inline void
rte_sched_port_pie_dequeue(struct rte_sched_subport * subport,uint32_t qindex,uint32_t pkt_len,uint64_t time)1908 rte_sched_port_pie_dequeue(struct rte_sched_subport *subport,
1909 uint32_t qindex, uint32_t pkt_len, uint64_t time) {
1910 if (subport->cman_enabled && subport->cman == RTE_SCHED_CMAN_PIE) {
1911 struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
1912 struct rte_pie *pie = &qe->pie;
1913
1914 /* Update queue length */
1915 pie->qlen -= 1;
1916 pie->qlen_bytes -= pkt_len;
1917
1918 rte_pie_dequeue(pie, pkt_len, time);
1919 }
1920 }
1921
1922 #ifdef RTE_SCHED_DEBUG
1923
1924 static inline void
debug_check_queue_slab(struct rte_sched_subport * subport,uint32_t bmp_pos,uint64_t bmp_slab)1925 debug_check_queue_slab(struct rte_sched_subport *subport, uint32_t bmp_pos,
1926 uint64_t bmp_slab)
1927 {
1928 uint64_t mask;
1929 uint32_t i, panic;
1930
1931 if (bmp_slab == 0)
1932 rte_panic("Empty slab at position %u\n", bmp_pos);
1933
1934 panic = 0;
1935 for (i = 0, mask = 1; i < 64; i++, mask <<= 1) {
1936 if (mask & bmp_slab) {
1937 if (rte_sched_port_queue_is_empty(subport, bmp_pos + i)) {
1938 printf("Queue %u (slab offset %u) is empty\n", bmp_pos + i, i);
1939 panic = 1;
1940 }
1941 }
1942 }
1943
1944 if (panic)
1945 rte_panic("Empty queues in slab 0x%" PRIx64 "starting at position %u\n",
1946 bmp_slab, bmp_pos);
1947 }
1948
1949 #endif /* RTE_SCHED_DEBUG */
1950
1951 static inline struct rte_sched_subport *
rte_sched_port_subport(struct rte_sched_port * port,struct rte_mbuf * pkt)1952 rte_sched_port_subport(struct rte_sched_port *port,
1953 struct rte_mbuf *pkt)
1954 {
1955 uint32_t queue_id = rte_mbuf_sched_queue_get(pkt);
1956 uint32_t subport_id = queue_id >> (port->n_pipes_per_subport_log2 + 4);
1957
1958 return port->subports[subport_id];
1959 }
1960
1961 static inline uint32_t
rte_sched_port_enqueue_qptrs_prefetch0(struct rte_sched_subport * subport,struct rte_mbuf * pkt,uint32_t subport_qmask)1962 rte_sched_port_enqueue_qptrs_prefetch0(struct rte_sched_subport *subport,
1963 struct rte_mbuf *pkt, uint32_t subport_qmask)
1964 {
1965 struct rte_sched_queue *q;
1966 struct rte_sched_queue_extra *qe;
1967 uint32_t qindex = rte_mbuf_sched_queue_get(pkt);
1968 uint32_t subport_queue_id = subport_qmask & qindex;
1969
1970 q = subport->queue + subport_queue_id;
1971 rte_prefetch0(q);
1972 qe = subport->queue_extra + subport_queue_id;
1973 rte_prefetch0(qe);
1974
1975 return subport_queue_id;
1976 }
1977
1978 static inline void
rte_sched_port_enqueue_qwa_prefetch0(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t qindex,struct rte_mbuf ** qbase)1979 rte_sched_port_enqueue_qwa_prefetch0(struct rte_sched_port *port,
1980 struct rte_sched_subport *subport,
1981 uint32_t qindex,
1982 struct rte_mbuf **qbase)
1983 {
1984 struct rte_sched_queue *q;
1985 struct rte_mbuf **q_qw;
1986 uint16_t qsize;
1987
1988 q = subport->queue + qindex;
1989 qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
1990 q_qw = qbase + (q->qw & (qsize - 1));
1991
1992 rte_prefetch0(q_qw);
1993 rte_bitmap_prefetch0(subport->bmp, qindex);
1994 }
1995
1996 static inline int
rte_sched_port_enqueue_qwa(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t qindex,struct rte_mbuf ** qbase,struct rte_mbuf * pkt)1997 rte_sched_port_enqueue_qwa(struct rte_sched_port *port,
1998 struct rte_sched_subport *subport,
1999 uint32_t qindex,
2000 struct rte_mbuf **qbase,
2001 struct rte_mbuf *pkt)
2002 {
2003 struct rte_sched_queue *q;
2004 uint16_t qsize;
2005 uint16_t qlen;
2006
2007 q = subport->queue + qindex;
2008 qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
2009 qlen = q->qw - q->qr;
2010
2011 /* Drop the packet (and update drop stats) when queue is full */
2012 if (unlikely(rte_sched_port_cman_drop(port, subport, pkt, qindex, qlen) ||
2013 (qlen >= qsize))) {
2014 rte_pktmbuf_free(pkt);
2015 rte_sched_port_update_subport_stats_on_drop(port, subport,
2016 qindex, pkt, qlen < qsize);
2017 rte_sched_port_update_queue_stats_on_drop(subport, qindex, pkt,
2018 qlen < qsize);
2019 return 0;
2020 }
2021
2022 /* Enqueue packet */
2023 qbase[q->qw & (qsize - 1)] = pkt;
2024 q->qw++;
2025
2026 /* Activate queue in the subport bitmap */
2027 rte_bitmap_set(subport->bmp, qindex);
2028
2029 /* Statistics */
2030 rte_sched_port_update_subport_stats(port, subport, qindex, pkt);
2031 rte_sched_port_update_queue_stats(subport, qindex, pkt);
2032
2033 return 1;
2034 }
2035
2036
2037 /*
2038 * The enqueue function implements a 4-level pipeline with each stage
2039 * processing two different packets. The purpose of using a pipeline
2040 * is to hide the latency of prefetching the data structures. The
2041 * naming convention is presented in the diagram below:
2042 *
2043 * p00 _______ p10 _______ p20 _______ p30 _______
2044 * ----->| |----->| |----->| |----->| |----->
2045 * | 0 | | 1 | | 2 | | 3 |
2046 * ----->|_______|----->|_______|----->|_______|----->|_______|----->
2047 * p01 p11 p21 p31
2048 */
2049 int
rte_sched_port_enqueue(struct rte_sched_port * port,struct rte_mbuf ** pkts,uint32_t n_pkts)2050 rte_sched_port_enqueue(struct rte_sched_port *port, struct rte_mbuf **pkts,
2051 uint32_t n_pkts)
2052 {
2053 struct rte_mbuf *pkt00, *pkt01, *pkt10, *pkt11, *pkt20, *pkt21,
2054 *pkt30, *pkt31, *pkt_last;
2055 struct rte_mbuf **q00_base, **q01_base, **q10_base, **q11_base,
2056 **q20_base, **q21_base, **q30_base, **q31_base, **q_last_base;
2057 struct rte_sched_subport *subport00, *subport01, *subport10, *subport11,
2058 *subport20, *subport21, *subport30, *subport31, *subport_last;
2059 uint32_t q00, q01, q10, q11, q20, q21, q30, q31, q_last;
2060 uint32_t r00, r01, r10, r11, r20, r21, r30, r31, r_last;
2061 uint32_t subport_qmask;
2062 uint32_t result, i;
2063
2064 result = 0;
2065 subport_qmask = (1 << (port->n_pipes_per_subport_log2 + 4)) - 1;
2066
2067 /*
2068 * Less then 6 input packets available, which is not enough to
2069 * feed the pipeline
2070 */
2071 if (unlikely(n_pkts < 6)) {
2072 struct rte_sched_subport *subports[5];
2073 struct rte_mbuf **q_base[5];
2074 uint32_t q[5];
2075
2076 /* Prefetch the mbuf structure of each packet */
2077 for (i = 0; i < n_pkts; i++)
2078 rte_prefetch0(pkts[i]);
2079
2080 /* Prefetch the subport structure for each packet */
2081 for (i = 0; i < n_pkts; i++)
2082 subports[i] = rte_sched_port_subport(port, pkts[i]);
2083
2084 /* Prefetch the queue structure for each queue */
2085 for (i = 0; i < n_pkts; i++)
2086 q[i] = rte_sched_port_enqueue_qptrs_prefetch0(subports[i],
2087 pkts[i], subport_qmask);
2088
2089 /* Prefetch the write pointer location of each queue */
2090 for (i = 0; i < n_pkts; i++) {
2091 q_base[i] = rte_sched_subport_pipe_qbase(subports[i], q[i]);
2092 rte_sched_port_enqueue_qwa_prefetch0(port, subports[i],
2093 q[i], q_base[i]);
2094 }
2095
2096 /* Write each packet to its queue */
2097 for (i = 0; i < n_pkts; i++)
2098 result += rte_sched_port_enqueue_qwa(port, subports[i],
2099 q[i], q_base[i], pkts[i]);
2100
2101 return result;
2102 }
2103
2104 /* Feed the first 3 stages of the pipeline (6 packets needed) */
2105 pkt20 = pkts[0];
2106 pkt21 = pkts[1];
2107 rte_prefetch0(pkt20);
2108 rte_prefetch0(pkt21);
2109
2110 pkt10 = pkts[2];
2111 pkt11 = pkts[3];
2112 rte_prefetch0(pkt10);
2113 rte_prefetch0(pkt11);
2114
2115 subport20 = rte_sched_port_subport(port, pkt20);
2116 subport21 = rte_sched_port_subport(port, pkt21);
2117 q20 = rte_sched_port_enqueue_qptrs_prefetch0(subport20,
2118 pkt20, subport_qmask);
2119 q21 = rte_sched_port_enqueue_qptrs_prefetch0(subport21,
2120 pkt21, subport_qmask);
2121
2122 pkt00 = pkts[4];
2123 pkt01 = pkts[5];
2124 rte_prefetch0(pkt00);
2125 rte_prefetch0(pkt01);
2126
2127 subport10 = rte_sched_port_subport(port, pkt10);
2128 subport11 = rte_sched_port_subport(port, pkt11);
2129 q10 = rte_sched_port_enqueue_qptrs_prefetch0(subport10,
2130 pkt10, subport_qmask);
2131 q11 = rte_sched_port_enqueue_qptrs_prefetch0(subport11,
2132 pkt11, subport_qmask);
2133
2134 q20_base = rte_sched_subport_pipe_qbase(subport20, q20);
2135 q21_base = rte_sched_subport_pipe_qbase(subport21, q21);
2136 rte_sched_port_enqueue_qwa_prefetch0(port, subport20, q20, q20_base);
2137 rte_sched_port_enqueue_qwa_prefetch0(port, subport21, q21, q21_base);
2138
2139 /* Run the pipeline */
2140 for (i = 6; i < (n_pkts & (~1)); i += 2) {
2141 /* Propagate stage inputs */
2142 pkt30 = pkt20;
2143 pkt31 = pkt21;
2144 pkt20 = pkt10;
2145 pkt21 = pkt11;
2146 pkt10 = pkt00;
2147 pkt11 = pkt01;
2148 q30 = q20;
2149 q31 = q21;
2150 q20 = q10;
2151 q21 = q11;
2152 subport30 = subport20;
2153 subport31 = subport21;
2154 subport20 = subport10;
2155 subport21 = subport11;
2156 q30_base = q20_base;
2157 q31_base = q21_base;
2158
2159 /* Stage 0: Get packets in */
2160 pkt00 = pkts[i];
2161 pkt01 = pkts[i + 1];
2162 rte_prefetch0(pkt00);
2163 rte_prefetch0(pkt01);
2164
2165 /* Stage 1: Prefetch subport and queue structure storing queue pointers */
2166 subport10 = rte_sched_port_subport(port, pkt10);
2167 subport11 = rte_sched_port_subport(port, pkt11);
2168 q10 = rte_sched_port_enqueue_qptrs_prefetch0(subport10,
2169 pkt10, subport_qmask);
2170 q11 = rte_sched_port_enqueue_qptrs_prefetch0(subport11,
2171 pkt11, subport_qmask);
2172
2173 /* Stage 2: Prefetch queue write location */
2174 q20_base = rte_sched_subport_pipe_qbase(subport20, q20);
2175 q21_base = rte_sched_subport_pipe_qbase(subport21, q21);
2176 rte_sched_port_enqueue_qwa_prefetch0(port, subport20, q20, q20_base);
2177 rte_sched_port_enqueue_qwa_prefetch0(port, subport21, q21, q21_base);
2178
2179 /* Stage 3: Write packet to queue and activate queue */
2180 r30 = rte_sched_port_enqueue_qwa(port, subport30,
2181 q30, q30_base, pkt30);
2182 r31 = rte_sched_port_enqueue_qwa(port, subport31,
2183 q31, q31_base, pkt31);
2184 result += r30 + r31;
2185 }
2186
2187 /*
2188 * Drain the pipeline (exactly 6 packets).
2189 * Handle the last packet in the case
2190 * of an odd number of input packets.
2191 */
2192 pkt_last = pkts[n_pkts - 1];
2193 rte_prefetch0(pkt_last);
2194
2195 subport00 = rte_sched_port_subport(port, pkt00);
2196 subport01 = rte_sched_port_subport(port, pkt01);
2197 q00 = rte_sched_port_enqueue_qptrs_prefetch0(subport00,
2198 pkt00, subport_qmask);
2199 q01 = rte_sched_port_enqueue_qptrs_prefetch0(subport01,
2200 pkt01, subport_qmask);
2201
2202 q10_base = rte_sched_subport_pipe_qbase(subport10, q10);
2203 q11_base = rte_sched_subport_pipe_qbase(subport11, q11);
2204 rte_sched_port_enqueue_qwa_prefetch0(port, subport10, q10, q10_base);
2205 rte_sched_port_enqueue_qwa_prefetch0(port, subport11, q11, q11_base);
2206
2207 r20 = rte_sched_port_enqueue_qwa(port, subport20,
2208 q20, q20_base, pkt20);
2209 r21 = rte_sched_port_enqueue_qwa(port, subport21,
2210 q21, q21_base, pkt21);
2211 result += r20 + r21;
2212
2213 subport_last = rte_sched_port_subport(port, pkt_last);
2214 q_last = rte_sched_port_enqueue_qptrs_prefetch0(subport_last,
2215 pkt_last, subport_qmask);
2216
2217 q00_base = rte_sched_subport_pipe_qbase(subport00, q00);
2218 q01_base = rte_sched_subport_pipe_qbase(subport01, q01);
2219 rte_sched_port_enqueue_qwa_prefetch0(port, subport00, q00, q00_base);
2220 rte_sched_port_enqueue_qwa_prefetch0(port, subport01, q01, q01_base);
2221
2222 r10 = rte_sched_port_enqueue_qwa(port, subport10, q10,
2223 q10_base, pkt10);
2224 r11 = rte_sched_port_enqueue_qwa(port, subport11, q11,
2225 q11_base, pkt11);
2226 result += r10 + r11;
2227
2228 q_last_base = rte_sched_subport_pipe_qbase(subport_last, q_last);
2229 rte_sched_port_enqueue_qwa_prefetch0(port, subport_last,
2230 q_last, q_last_base);
2231
2232 r00 = rte_sched_port_enqueue_qwa(port, subport00, q00,
2233 q00_base, pkt00);
2234 r01 = rte_sched_port_enqueue_qwa(port, subport01, q01,
2235 q01_base, pkt01);
2236 result += r00 + r01;
2237
2238 if (n_pkts & 1) {
2239 r_last = rte_sched_port_enqueue_qwa(port, subport_last,
2240 q_last, q_last_base, pkt_last);
2241 result += r_last;
2242 }
2243
2244 return result;
2245 }
2246
2247 static inline uint64_t
grinder_tc_ov_credits_update(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2248 grinder_tc_ov_credits_update(struct rte_sched_port *port,
2249 struct rte_sched_subport *subport, uint32_t pos)
2250 {
2251 struct rte_sched_grinder *grinder = subport->grinder + pos;
2252 struct rte_sched_subport_profile *sp = grinder->subport_params;
2253 uint64_t tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
2254 uint64_t tc_consumption = 0, tc_ov_consumption_max;
2255 uint64_t tc_ov_wm = subport->tc_ov_wm;
2256 uint32_t i;
2257
2258 if (subport->tc_ov == 0)
2259 return subport->tc_ov_wm_max;
2260
2261 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASS_BE; i++) {
2262 tc_ov_consumption[i] = sp->tc_credits_per_period[i]
2263 - subport->tc_credits[i];
2264 tc_consumption += tc_ov_consumption[i];
2265 }
2266
2267 tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASS_BE] =
2268 sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE] -
2269 subport->tc_credits[RTE_SCHED_TRAFFIC_CLASS_BE];
2270
2271 tc_ov_consumption_max =
2272 sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE] -
2273 tc_consumption;
2274
2275 if (tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASS_BE] >
2276 (tc_ov_consumption_max - port->mtu)) {
2277 tc_ov_wm -= tc_ov_wm >> 7;
2278 if (tc_ov_wm < subport->tc_ov_wm_min)
2279 tc_ov_wm = subport->tc_ov_wm_min;
2280
2281 return tc_ov_wm;
2282 }
2283
2284 tc_ov_wm += (tc_ov_wm >> 7) + 1;
2285 if (tc_ov_wm > subport->tc_ov_wm_max)
2286 tc_ov_wm = subport->tc_ov_wm_max;
2287
2288 return tc_ov_wm;
2289 }
2290
2291 static inline void
grinder_credits_update(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2292 grinder_credits_update(struct rte_sched_port *port,
2293 struct rte_sched_subport *subport, uint32_t pos)
2294 {
2295 struct rte_sched_grinder *grinder = subport->grinder + pos;
2296 struct rte_sched_pipe *pipe = grinder->pipe;
2297 struct rte_sched_pipe_profile *params = grinder->pipe_params;
2298 struct rte_sched_subport_profile *sp = grinder->subport_params;
2299 uint64_t n_periods;
2300 uint32_t i;
2301
2302 /* Subport TB */
2303 n_periods = (port->time - subport->tb_time) / sp->tb_period;
2304 subport->tb_credits += n_periods * sp->tb_credits_per_period;
2305 subport->tb_credits = RTE_MIN(subport->tb_credits, sp->tb_size);
2306 subport->tb_time += n_periods * sp->tb_period;
2307
2308 /* Pipe TB */
2309 n_periods = (port->time - pipe->tb_time) / params->tb_period;
2310 pipe->tb_credits += n_periods * params->tb_credits_per_period;
2311 pipe->tb_credits = RTE_MIN(pipe->tb_credits, params->tb_size);
2312 pipe->tb_time += n_periods * params->tb_period;
2313
2314 /* Subport TCs */
2315 if (unlikely(port->time >= subport->tc_time)) {
2316 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2317 subport->tc_credits[i] = sp->tc_credits_per_period[i];
2318
2319 subport->tc_time = port->time + sp->tc_period;
2320 }
2321
2322 /* Pipe TCs */
2323 if (unlikely(port->time >= pipe->tc_time)) {
2324 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2325 pipe->tc_credits[i] = params->tc_credits_per_period[i];
2326 pipe->tc_time = port->time + params->tc_period;
2327 }
2328 }
2329
2330 static inline void
grinder_credits_update_with_tc_ov(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2331 grinder_credits_update_with_tc_ov(struct rte_sched_port *port,
2332 struct rte_sched_subport *subport, uint32_t pos)
2333 {
2334 struct rte_sched_grinder *grinder = subport->grinder + pos;
2335 struct rte_sched_pipe *pipe = grinder->pipe;
2336 struct rte_sched_pipe_profile *params = grinder->pipe_params;
2337 struct rte_sched_subport_profile *sp = grinder->subport_params;
2338 uint64_t n_periods;
2339 uint32_t i;
2340
2341 /* Subport TB */
2342 n_periods = (port->time - subport->tb_time) / sp->tb_period;
2343 subport->tb_credits += n_periods * sp->tb_credits_per_period;
2344 subport->tb_credits = RTE_MIN(subport->tb_credits, sp->tb_size);
2345 subport->tb_time += n_periods * sp->tb_period;
2346
2347 /* Pipe TB */
2348 n_periods = (port->time - pipe->tb_time) / params->tb_period;
2349 pipe->tb_credits += n_periods * params->tb_credits_per_period;
2350 pipe->tb_credits = RTE_MIN(pipe->tb_credits, params->tb_size);
2351 pipe->tb_time += n_periods * params->tb_period;
2352
2353 /* Subport TCs */
2354 if (unlikely(port->time >= subport->tc_time)) {
2355 subport->tc_ov_wm =
2356 grinder_tc_ov_credits_update(port, subport, pos);
2357
2358 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2359 subport->tc_credits[i] = sp->tc_credits_per_period[i];
2360
2361 subport->tc_time = port->time + sp->tc_period;
2362 subport->tc_ov_period_id++;
2363 }
2364
2365 /* Pipe TCs */
2366 if (unlikely(port->time >= pipe->tc_time)) {
2367 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2368 pipe->tc_credits[i] = params->tc_credits_per_period[i];
2369 pipe->tc_time = port->time + params->tc_period;
2370 }
2371
2372 /* Pipe TCs - Oversubscription */
2373 if (unlikely(pipe->tc_ov_period_id != subport->tc_ov_period_id)) {
2374 pipe->tc_ov_credits = subport->tc_ov_wm * params->tc_ov_weight;
2375
2376 pipe->tc_ov_period_id = subport->tc_ov_period_id;
2377 }
2378 }
2379
2380 static inline int
grinder_credits_check(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2381 grinder_credits_check(struct rte_sched_port *port,
2382 struct rte_sched_subport *subport, uint32_t pos)
2383 {
2384 struct rte_sched_grinder *grinder = subport->grinder + pos;
2385 struct rte_sched_pipe *pipe = grinder->pipe;
2386 struct rte_mbuf *pkt = grinder->pkt;
2387 uint32_t tc_index = grinder->tc_index;
2388 uint64_t pkt_len = pkt->pkt_len + port->frame_overhead;
2389 uint64_t subport_tb_credits = subport->tb_credits;
2390 uint64_t subport_tc_credits = subport->tc_credits[tc_index];
2391 uint64_t pipe_tb_credits = pipe->tb_credits;
2392 uint64_t pipe_tc_credits = pipe->tc_credits[tc_index];
2393 int enough_credits;
2394
2395 /* Check pipe and subport credits */
2396 enough_credits = (pkt_len <= subport_tb_credits) &&
2397 (pkt_len <= subport_tc_credits) &&
2398 (pkt_len <= pipe_tb_credits) &&
2399 (pkt_len <= pipe_tc_credits);
2400
2401 if (!enough_credits)
2402 return 0;
2403
2404 /* Update pipe and subport credits */
2405 subport->tb_credits -= pkt_len;
2406 subport->tc_credits[tc_index] -= pkt_len;
2407 pipe->tb_credits -= pkt_len;
2408 pipe->tc_credits[tc_index] -= pkt_len;
2409
2410 return 1;
2411 }
2412
2413 static inline int
grinder_credits_check_with_tc_ov(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2414 grinder_credits_check_with_tc_ov(struct rte_sched_port *port,
2415 struct rte_sched_subport *subport, uint32_t pos)
2416 {
2417 struct rte_sched_grinder *grinder = subport->grinder + pos;
2418 struct rte_sched_pipe *pipe = grinder->pipe;
2419 struct rte_mbuf *pkt = grinder->pkt;
2420 uint32_t tc_index = grinder->tc_index;
2421 uint64_t pkt_len = pkt->pkt_len + port->frame_overhead;
2422 uint64_t subport_tb_credits = subport->tb_credits;
2423 uint64_t subport_tc_credits = subport->tc_credits[tc_index];
2424 uint64_t pipe_tb_credits = pipe->tb_credits;
2425 uint64_t pipe_tc_credits = pipe->tc_credits[tc_index];
2426 uint64_t pipe_tc_ov_mask1[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
2427 uint64_t pipe_tc_ov_mask2[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE] = {0};
2428 uint64_t pipe_tc_ov_credits;
2429 uint32_t i;
2430 int enough_credits;
2431
2432 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2433 pipe_tc_ov_mask1[i] = ~0LLU;
2434
2435 pipe_tc_ov_mask1[RTE_SCHED_TRAFFIC_CLASS_BE] = pipe->tc_ov_credits;
2436 pipe_tc_ov_mask2[RTE_SCHED_TRAFFIC_CLASS_BE] = ~0LLU;
2437 pipe_tc_ov_credits = pipe_tc_ov_mask1[tc_index];
2438
2439 /* Check pipe and subport credits */
2440 enough_credits = (pkt_len <= subport_tb_credits) &&
2441 (pkt_len <= subport_tc_credits) &&
2442 (pkt_len <= pipe_tb_credits) &&
2443 (pkt_len <= pipe_tc_credits) &&
2444 (pkt_len <= pipe_tc_ov_credits);
2445
2446 if (!enough_credits)
2447 return 0;
2448
2449 /* Update pipe and subport credits */
2450 subport->tb_credits -= pkt_len;
2451 subport->tc_credits[tc_index] -= pkt_len;
2452 pipe->tb_credits -= pkt_len;
2453 pipe->tc_credits[tc_index] -= pkt_len;
2454 pipe->tc_ov_credits -= pipe_tc_ov_mask2[tc_index] & pkt_len;
2455
2456 return 1;
2457 }
2458
2459
2460 static inline int
grinder_schedule(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2461 grinder_schedule(struct rte_sched_port *port,
2462 struct rte_sched_subport *subport, uint32_t pos)
2463 {
2464 struct rte_sched_grinder *grinder = subport->grinder + pos;
2465 struct rte_sched_queue *queue = grinder->queue[grinder->qpos];
2466 uint32_t qindex = grinder->qindex[grinder->qpos];
2467 struct rte_mbuf *pkt = grinder->pkt;
2468 uint32_t pkt_len = pkt->pkt_len + port->frame_overhead;
2469 uint32_t be_tc_active;
2470
2471 if (subport->tc_ov_enabled) {
2472 if (!grinder_credits_check_with_tc_ov(port, subport, pos))
2473 return 0;
2474 } else {
2475 if (!grinder_credits_check(port, subport, pos))
2476 return 0;
2477 }
2478
2479 /* Advance port time */
2480 port->time += pkt_len;
2481
2482 /* Send packet */
2483 port->pkts_out[port->n_pkts_out++] = pkt;
2484 queue->qr++;
2485
2486 be_tc_active = (grinder->tc_index == RTE_SCHED_TRAFFIC_CLASS_BE) ? ~0x0 : 0x0;
2487 grinder->wrr_tokens[grinder->qpos] +=
2488 (pkt_len * grinder->wrr_cost[grinder->qpos]) & be_tc_active;
2489
2490 if (queue->qr == queue->qw) {
2491 rte_bitmap_clear(subport->bmp, qindex);
2492 grinder->qmask &= ~(1 << grinder->qpos);
2493 if (be_tc_active)
2494 grinder->wrr_mask[grinder->qpos] = 0;
2495
2496 rte_sched_port_red_set_queue_empty_timestamp(port, subport, qindex);
2497 }
2498
2499 rte_sched_port_pie_dequeue(subport, qindex, pkt_len, port->time_cpu_cycles);
2500
2501 /* Reset pipe loop detection */
2502 subport->pipe_loop = RTE_SCHED_PIPE_INVALID;
2503 grinder->productive = 1;
2504
2505 return 1;
2506 }
2507
2508 static inline int
grinder_pipe_exists(struct rte_sched_subport * subport,uint32_t base_pipe)2509 grinder_pipe_exists(struct rte_sched_subport *subport, uint32_t base_pipe)
2510 {
2511 uint32_t i;
2512
2513 for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++) {
2514 if (subport->grinder_base_bmp_pos[i] == base_pipe)
2515 return 1;
2516 }
2517
2518 return 0;
2519 }
2520
2521 static inline void
grinder_pcache_populate(struct rte_sched_subport * subport,uint32_t pos,uint32_t bmp_pos,uint64_t bmp_slab)2522 grinder_pcache_populate(struct rte_sched_subport *subport,
2523 uint32_t pos, uint32_t bmp_pos, uint64_t bmp_slab)
2524 {
2525 struct rte_sched_grinder *grinder = subport->grinder + pos;
2526 uint16_t w[4];
2527
2528 grinder->pcache_w = 0;
2529 grinder->pcache_r = 0;
2530
2531 w[0] = (uint16_t) bmp_slab;
2532 w[1] = (uint16_t) (bmp_slab >> 16);
2533 w[2] = (uint16_t) (bmp_slab >> 32);
2534 w[3] = (uint16_t) (bmp_slab >> 48);
2535
2536 grinder->pcache_qmask[grinder->pcache_w] = w[0];
2537 grinder->pcache_qindex[grinder->pcache_w] = bmp_pos;
2538 grinder->pcache_w += (w[0] != 0);
2539
2540 grinder->pcache_qmask[grinder->pcache_w] = w[1];
2541 grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 16;
2542 grinder->pcache_w += (w[1] != 0);
2543
2544 grinder->pcache_qmask[grinder->pcache_w] = w[2];
2545 grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 32;
2546 grinder->pcache_w += (w[2] != 0);
2547
2548 grinder->pcache_qmask[grinder->pcache_w] = w[3];
2549 grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 48;
2550 grinder->pcache_w += (w[3] != 0);
2551 }
2552
2553 static inline void
grinder_tccache_populate(struct rte_sched_subport * subport,uint32_t pos,uint32_t qindex,uint16_t qmask)2554 grinder_tccache_populate(struct rte_sched_subport *subport,
2555 uint32_t pos, uint32_t qindex, uint16_t qmask)
2556 {
2557 struct rte_sched_grinder *grinder = subport->grinder + pos;
2558 uint8_t b, i;
2559
2560 grinder->tccache_w = 0;
2561 grinder->tccache_r = 0;
2562
2563 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASS_BE; i++) {
2564 b = (uint8_t) ((qmask >> i) & 0x1);
2565 grinder->tccache_qmask[grinder->tccache_w] = b;
2566 grinder->tccache_qindex[grinder->tccache_w] = qindex + i;
2567 grinder->tccache_w += (b != 0);
2568 }
2569
2570 b = (uint8_t) (qmask >> (RTE_SCHED_TRAFFIC_CLASS_BE));
2571 grinder->tccache_qmask[grinder->tccache_w] = b;
2572 grinder->tccache_qindex[grinder->tccache_w] = qindex +
2573 RTE_SCHED_TRAFFIC_CLASS_BE;
2574 grinder->tccache_w += (b != 0);
2575 }
2576
2577 static inline int
grinder_next_tc(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2578 grinder_next_tc(struct rte_sched_port *port,
2579 struct rte_sched_subport *subport, uint32_t pos)
2580 {
2581 struct rte_sched_grinder *grinder = subport->grinder + pos;
2582 struct rte_mbuf **qbase;
2583 uint32_t qindex;
2584 uint16_t qsize;
2585
2586 if (grinder->tccache_r == grinder->tccache_w)
2587 return 0;
2588
2589 qindex = grinder->tccache_qindex[grinder->tccache_r];
2590 qbase = rte_sched_subport_pipe_qbase(subport, qindex);
2591 qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
2592
2593 grinder->tc_index = rte_sched_port_pipe_tc(port, qindex);
2594 grinder->qmask = grinder->tccache_qmask[grinder->tccache_r];
2595 grinder->qsize = qsize;
2596
2597 if (grinder->tc_index < RTE_SCHED_TRAFFIC_CLASS_BE) {
2598 grinder->queue[0] = subport->queue + qindex;
2599 grinder->qbase[0] = qbase;
2600 grinder->qindex[0] = qindex;
2601 grinder->tccache_r++;
2602
2603 return 1;
2604 }
2605
2606 grinder->queue[0] = subport->queue + qindex;
2607 grinder->queue[1] = subport->queue + qindex + 1;
2608 grinder->queue[2] = subport->queue + qindex + 2;
2609 grinder->queue[3] = subport->queue + qindex + 3;
2610
2611 grinder->qbase[0] = qbase;
2612 grinder->qbase[1] = qbase + qsize;
2613 grinder->qbase[2] = qbase + 2 * qsize;
2614 grinder->qbase[3] = qbase + 3 * qsize;
2615
2616 grinder->qindex[0] = qindex;
2617 grinder->qindex[1] = qindex + 1;
2618 grinder->qindex[2] = qindex + 2;
2619 grinder->qindex[3] = qindex + 3;
2620
2621 grinder->tccache_r++;
2622 return 1;
2623 }
2624
2625 static inline int
grinder_next_pipe(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2626 grinder_next_pipe(struct rte_sched_port *port,
2627 struct rte_sched_subport *subport, uint32_t pos)
2628 {
2629 struct rte_sched_grinder *grinder = subport->grinder + pos;
2630 uint32_t pipe_qindex;
2631 uint16_t pipe_qmask;
2632
2633 if (grinder->pcache_r < grinder->pcache_w) {
2634 pipe_qmask = grinder->pcache_qmask[grinder->pcache_r];
2635 pipe_qindex = grinder->pcache_qindex[grinder->pcache_r];
2636 grinder->pcache_r++;
2637 } else {
2638 uint64_t bmp_slab = 0;
2639 uint32_t bmp_pos = 0;
2640
2641 /* Get another non-empty pipe group */
2642 if (unlikely(rte_bitmap_scan(subport->bmp, &bmp_pos, &bmp_slab) <= 0))
2643 return 0;
2644
2645 #ifdef RTE_SCHED_DEBUG
2646 debug_check_queue_slab(subport, bmp_pos, bmp_slab);
2647 #endif
2648
2649 /* Return if pipe group already in one of the other grinders */
2650 subport->grinder_base_bmp_pos[pos] = RTE_SCHED_BMP_POS_INVALID;
2651 if (unlikely(grinder_pipe_exists(subport, bmp_pos)))
2652 return 0;
2653
2654 subport->grinder_base_bmp_pos[pos] = bmp_pos;
2655
2656 /* Install new pipe group into grinder's pipe cache */
2657 grinder_pcache_populate(subport, pos, bmp_pos, bmp_slab);
2658
2659 pipe_qmask = grinder->pcache_qmask[0];
2660 pipe_qindex = grinder->pcache_qindex[0];
2661 grinder->pcache_r = 1;
2662 }
2663
2664 /* Install new pipe in the grinder */
2665 grinder->pindex = pipe_qindex >> 4;
2666 grinder->subport = subport;
2667 grinder->pipe = subport->pipe + grinder->pindex;
2668 grinder->pipe_params = NULL; /* to be set after the pipe structure is prefetched */
2669 grinder->productive = 0;
2670
2671 grinder_tccache_populate(subport, pos, pipe_qindex, pipe_qmask);
2672 grinder_next_tc(port, subport, pos);
2673
2674 /* Check for pipe exhaustion */
2675 if (grinder->pindex == subport->pipe_loop) {
2676 subport->pipe_exhaustion = 1;
2677 subport->pipe_loop = RTE_SCHED_PIPE_INVALID;
2678 }
2679
2680 return 1;
2681 }
2682
2683
2684 static inline void
grinder_wrr_load(struct rte_sched_subport * subport,uint32_t pos)2685 grinder_wrr_load(struct rte_sched_subport *subport, uint32_t pos)
2686 {
2687 struct rte_sched_grinder *grinder = subport->grinder + pos;
2688 struct rte_sched_pipe *pipe = grinder->pipe;
2689 struct rte_sched_pipe_profile *pipe_params = grinder->pipe_params;
2690 uint32_t qmask = grinder->qmask;
2691
2692 grinder->wrr_tokens[0] =
2693 ((uint16_t) pipe->wrr_tokens[0]) << RTE_SCHED_WRR_SHIFT;
2694 grinder->wrr_tokens[1] =
2695 ((uint16_t) pipe->wrr_tokens[1]) << RTE_SCHED_WRR_SHIFT;
2696 grinder->wrr_tokens[2] =
2697 ((uint16_t) pipe->wrr_tokens[2]) << RTE_SCHED_WRR_SHIFT;
2698 grinder->wrr_tokens[3] =
2699 ((uint16_t) pipe->wrr_tokens[3]) << RTE_SCHED_WRR_SHIFT;
2700
2701 grinder->wrr_mask[0] = (qmask & 0x1) * 0xFFFF;
2702 grinder->wrr_mask[1] = ((qmask >> 1) & 0x1) * 0xFFFF;
2703 grinder->wrr_mask[2] = ((qmask >> 2) & 0x1) * 0xFFFF;
2704 grinder->wrr_mask[3] = ((qmask >> 3) & 0x1) * 0xFFFF;
2705
2706 grinder->wrr_cost[0] = pipe_params->wrr_cost[0];
2707 grinder->wrr_cost[1] = pipe_params->wrr_cost[1];
2708 grinder->wrr_cost[2] = pipe_params->wrr_cost[2];
2709 grinder->wrr_cost[3] = pipe_params->wrr_cost[3];
2710 }
2711
2712 static inline void
grinder_wrr_store(struct rte_sched_subport * subport,uint32_t pos)2713 grinder_wrr_store(struct rte_sched_subport *subport, uint32_t pos)
2714 {
2715 struct rte_sched_grinder *grinder = subport->grinder + pos;
2716 struct rte_sched_pipe *pipe = grinder->pipe;
2717
2718 pipe->wrr_tokens[0] =
2719 (grinder->wrr_tokens[0] & grinder->wrr_mask[0]) >>
2720 RTE_SCHED_WRR_SHIFT;
2721 pipe->wrr_tokens[1] =
2722 (grinder->wrr_tokens[1] & grinder->wrr_mask[1]) >>
2723 RTE_SCHED_WRR_SHIFT;
2724 pipe->wrr_tokens[2] =
2725 (grinder->wrr_tokens[2] & grinder->wrr_mask[2]) >>
2726 RTE_SCHED_WRR_SHIFT;
2727 pipe->wrr_tokens[3] =
2728 (grinder->wrr_tokens[3] & grinder->wrr_mask[3]) >>
2729 RTE_SCHED_WRR_SHIFT;
2730 }
2731
2732 static inline void
grinder_wrr(struct rte_sched_subport * subport,uint32_t pos)2733 grinder_wrr(struct rte_sched_subport *subport, uint32_t pos)
2734 {
2735 struct rte_sched_grinder *grinder = subport->grinder + pos;
2736 uint16_t wrr_tokens_min;
2737
2738 grinder->wrr_tokens[0] |= ~grinder->wrr_mask[0];
2739 grinder->wrr_tokens[1] |= ~grinder->wrr_mask[1];
2740 grinder->wrr_tokens[2] |= ~grinder->wrr_mask[2];
2741 grinder->wrr_tokens[3] |= ~grinder->wrr_mask[3];
2742
2743 grinder->qpos = rte_min_pos_4_u16(grinder->wrr_tokens);
2744 wrr_tokens_min = grinder->wrr_tokens[grinder->qpos];
2745
2746 grinder->wrr_tokens[0] -= wrr_tokens_min;
2747 grinder->wrr_tokens[1] -= wrr_tokens_min;
2748 grinder->wrr_tokens[2] -= wrr_tokens_min;
2749 grinder->wrr_tokens[3] -= wrr_tokens_min;
2750 }
2751
2752
2753 #define grinder_evict(subport, pos)
2754
2755 static inline void
grinder_prefetch_pipe(struct rte_sched_subport * subport,uint32_t pos)2756 grinder_prefetch_pipe(struct rte_sched_subport *subport, uint32_t pos)
2757 {
2758 struct rte_sched_grinder *grinder = subport->grinder + pos;
2759
2760 rte_prefetch0(grinder->pipe);
2761 rte_prefetch0(grinder->queue[0]);
2762 }
2763
2764 static inline void
grinder_prefetch_tc_queue_arrays(struct rte_sched_subport * subport,uint32_t pos)2765 grinder_prefetch_tc_queue_arrays(struct rte_sched_subport *subport, uint32_t pos)
2766 {
2767 struct rte_sched_grinder *grinder = subport->grinder + pos;
2768 uint16_t qsize, qr[RTE_SCHED_MAX_QUEUES_PER_TC];
2769
2770 qsize = grinder->qsize;
2771 grinder->qpos = 0;
2772
2773 if (grinder->tc_index < RTE_SCHED_TRAFFIC_CLASS_BE) {
2774 qr[0] = grinder->queue[0]->qr & (qsize - 1);
2775
2776 rte_prefetch0(grinder->qbase[0] + qr[0]);
2777 return;
2778 }
2779
2780 qr[0] = grinder->queue[0]->qr & (qsize - 1);
2781 qr[1] = grinder->queue[1]->qr & (qsize - 1);
2782 qr[2] = grinder->queue[2]->qr & (qsize - 1);
2783 qr[3] = grinder->queue[3]->qr & (qsize - 1);
2784
2785 rte_prefetch0(grinder->qbase[0] + qr[0]);
2786 rte_prefetch0(grinder->qbase[1] + qr[1]);
2787
2788 grinder_wrr_load(subport, pos);
2789 grinder_wrr(subport, pos);
2790
2791 rte_prefetch0(grinder->qbase[2] + qr[2]);
2792 rte_prefetch0(grinder->qbase[3] + qr[3]);
2793 }
2794
2795 static inline void
grinder_prefetch_mbuf(struct rte_sched_subport * subport,uint32_t pos)2796 grinder_prefetch_mbuf(struct rte_sched_subport *subport, uint32_t pos)
2797 {
2798 struct rte_sched_grinder *grinder = subport->grinder + pos;
2799 uint32_t qpos = grinder->qpos;
2800 struct rte_mbuf **qbase = grinder->qbase[qpos];
2801 uint16_t qsize = grinder->qsize;
2802 uint16_t qr = grinder->queue[qpos]->qr & (qsize - 1);
2803
2804 grinder->pkt = qbase[qr];
2805 rte_prefetch0(grinder->pkt);
2806
2807 if (unlikely((qr & 0x7) == 7)) {
2808 uint16_t qr_next = (grinder->queue[qpos]->qr + 1) & (qsize - 1);
2809
2810 rte_prefetch0(qbase + qr_next);
2811 }
2812 }
2813
2814 static inline uint32_t
grinder_handle(struct rte_sched_port * port,struct rte_sched_subport * subport,uint32_t pos)2815 grinder_handle(struct rte_sched_port *port,
2816 struct rte_sched_subport *subport, uint32_t pos)
2817 {
2818 struct rte_sched_grinder *grinder = subport->grinder + pos;
2819
2820 switch (grinder->state) {
2821 case e_GRINDER_PREFETCH_PIPE:
2822 {
2823 if (grinder_next_pipe(port, subport, pos)) {
2824 grinder_prefetch_pipe(subport, pos);
2825 subport->busy_grinders++;
2826
2827 grinder->state = e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS;
2828 return 0;
2829 }
2830
2831 return 0;
2832 }
2833
2834 case e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS:
2835 {
2836 struct rte_sched_pipe *pipe = grinder->pipe;
2837
2838 grinder->pipe_params = subport->pipe_profiles + pipe->profile;
2839 grinder->subport_params = port->subport_profiles +
2840 subport->profile;
2841
2842 grinder_prefetch_tc_queue_arrays(subport, pos);
2843
2844 if (subport->tc_ov_enabled)
2845 grinder_credits_update_with_tc_ov(port, subport, pos);
2846 else
2847 grinder_credits_update(port, subport, pos);
2848
2849 grinder->state = e_GRINDER_PREFETCH_MBUF;
2850 return 0;
2851 }
2852
2853 case e_GRINDER_PREFETCH_MBUF:
2854 {
2855 grinder_prefetch_mbuf(subport, pos);
2856
2857 grinder->state = e_GRINDER_READ_MBUF;
2858 return 0;
2859 }
2860
2861 case e_GRINDER_READ_MBUF:
2862 {
2863 uint32_t wrr_active, result = 0;
2864
2865 result = grinder_schedule(port, subport, pos);
2866
2867 wrr_active = (grinder->tc_index == RTE_SCHED_TRAFFIC_CLASS_BE);
2868
2869 /* Look for next packet within the same TC */
2870 if (result && grinder->qmask) {
2871 if (wrr_active)
2872 grinder_wrr(subport, pos);
2873
2874 grinder_prefetch_mbuf(subport, pos);
2875
2876 return 1;
2877 }
2878
2879 if (wrr_active)
2880 grinder_wrr_store(subport, pos);
2881
2882 /* Look for another active TC within same pipe */
2883 if (grinder_next_tc(port, subport, pos)) {
2884 grinder_prefetch_tc_queue_arrays(subport, pos);
2885
2886 grinder->state = e_GRINDER_PREFETCH_MBUF;
2887 return result;
2888 }
2889
2890 if (grinder->productive == 0 &&
2891 subport->pipe_loop == RTE_SCHED_PIPE_INVALID)
2892 subport->pipe_loop = grinder->pindex;
2893
2894 grinder_evict(subport, pos);
2895
2896 /* Look for another active pipe */
2897 if (grinder_next_pipe(port, subport, pos)) {
2898 grinder_prefetch_pipe(subport, pos);
2899
2900 grinder->state = e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS;
2901 return result;
2902 }
2903
2904 /* No active pipe found */
2905 subport->busy_grinders--;
2906
2907 grinder->state = e_GRINDER_PREFETCH_PIPE;
2908 return result;
2909 }
2910
2911 default:
2912 rte_panic("Algorithmic error (invalid state)\n");
2913 return 0;
2914 }
2915 }
2916
2917 static inline void
rte_sched_port_time_resync(struct rte_sched_port * port)2918 rte_sched_port_time_resync(struct rte_sched_port *port)
2919 {
2920 uint64_t cycles = rte_get_tsc_cycles();
2921 uint64_t cycles_diff;
2922 uint64_t bytes_diff;
2923 uint32_t i;
2924
2925 if (cycles < port->time_cpu_cycles)
2926 port->time_cpu_cycles = 0;
2927
2928 cycles_diff = cycles - port->time_cpu_cycles;
2929 /* Compute elapsed time in bytes */
2930 bytes_diff = rte_reciprocal_divide(cycles_diff << RTE_SCHED_TIME_SHIFT,
2931 port->inv_cycles_per_byte);
2932
2933 /* Advance port time */
2934 port->time_cpu_cycles +=
2935 (bytes_diff * port->cycles_per_byte) >> RTE_SCHED_TIME_SHIFT;
2936 port->time_cpu_bytes += bytes_diff;
2937 if (port->time < port->time_cpu_bytes)
2938 port->time = port->time_cpu_bytes;
2939
2940 /* Reset pipe loop detection */
2941 for (i = 0; i < port->n_subports_per_port; i++)
2942 port->subports[i]->pipe_loop = RTE_SCHED_PIPE_INVALID;
2943 }
2944
2945 static inline int
rte_sched_port_exceptions(struct rte_sched_subport * subport,int second_pass)2946 rte_sched_port_exceptions(struct rte_sched_subport *subport, int second_pass)
2947 {
2948 int exceptions;
2949
2950 /* Check if any exception flag is set */
2951 exceptions = (second_pass && subport->busy_grinders == 0) ||
2952 (subport->pipe_exhaustion == 1);
2953
2954 /* Clear exception flags */
2955 subport->pipe_exhaustion = 0;
2956
2957 return exceptions;
2958 }
2959
2960 int
rte_sched_port_dequeue(struct rte_sched_port * port,struct rte_mbuf ** pkts,uint32_t n_pkts)2961 rte_sched_port_dequeue(struct rte_sched_port *port, struct rte_mbuf **pkts, uint32_t n_pkts)
2962 {
2963 struct rte_sched_subport *subport;
2964 uint32_t subport_id = port->subport_id;
2965 uint32_t i, n_subports = 0, count;
2966
2967 port->pkts_out = pkts;
2968 port->n_pkts_out = 0;
2969
2970 rte_sched_port_time_resync(port);
2971
2972 /* Take each queue in the grinder one step further */
2973 for (i = 0, count = 0; ; i++) {
2974 subport = port->subports[subport_id];
2975
2976 count += grinder_handle(port, subport,
2977 i & (RTE_SCHED_PORT_N_GRINDERS - 1));
2978
2979 if (count == n_pkts) {
2980 subport_id++;
2981
2982 if (subport_id == port->n_subports_per_port)
2983 subport_id = 0;
2984
2985 port->subport_id = subport_id;
2986 break;
2987 }
2988
2989 if (rte_sched_port_exceptions(subport, i >= RTE_SCHED_PORT_N_GRINDERS)) {
2990 i = 0;
2991 subport_id++;
2992 n_subports++;
2993 }
2994
2995 if (subport_id == port->n_subports_per_port)
2996 subport_id = 0;
2997
2998 if (n_subports == port->n_subports_per_port) {
2999 port->subport_id = subport_id;
3000 break;
3001 }
3002 }
3003
3004 return count;
3005 }
3006
3007 RTE_LOG_REGISTER_DEFAULT(sched_logtype, INFO);
3008