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1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright (c) 2015-2018 Atomic Rules LLC
3 */
4
5 #include <unistd.h>
6
7 #include "ark_ethdev_rx.h"
8 #include "ark_global.h"
9 #include "ark_logs.h"
10 #include "ark_mpu.h"
11 #include "ark_udm.h"
12
13 #define ARK_RX_META_SIZE 32
14 #define ARK_RX_META_OFFSET (RTE_PKTMBUF_HEADROOM - ARK_RX_META_SIZE)
15 #define ARK_RX_MAX_NOCHAIN (RTE_MBUF_DEFAULT_DATAROOM)
16
17 /* Forward declarations */
18 struct ark_rx_queue;
19 struct ark_rx_meta;
20
21 static void dump_mbuf_data(struct rte_mbuf *mbuf, uint16_t lo, uint16_t hi);
22 static void ark_ethdev_rx_dump(const char *name, struct ark_rx_queue *queue);
23 static uint32_t eth_ark_rx_jumbo(struct ark_rx_queue *queue,
24 struct ark_rx_meta *meta,
25 struct rte_mbuf *mbuf0,
26 uint32_t cons_index);
27 static inline int eth_ark_rx_seed_mbufs(struct ark_rx_queue *queue);
28 static int eth_ark_rx_seed_recovery(struct ark_rx_queue *queue,
29 uint32_t *pnb,
30 struct rte_mbuf **mbufs);
31
32 /* ************************************************************************* */
33 struct ark_rx_queue {
34 /* array of mbufs to populate */
35 struct rte_mbuf **reserve_q;
36 /* array of physical addresses of the mbuf data pointer */
37 /* This point is a virtual address */
38 rte_iova_t *paddress_q;
39 struct rte_mempool *mb_pool;
40
41 struct ark_udm_t *udm;
42 struct ark_mpu_t *mpu;
43
44 uint32_t queue_size;
45 uint32_t queue_mask;
46
47 uint32_t seed_index; /* step 1 set with empty mbuf */
48 uint32_t cons_index; /* step 3 consumed by driver */
49
50 /* The queue Id is used to identify the HW Q */
51 uint16_t phys_qid;
52
53 /* The queue Index is used within the dpdk device structures */
54 uint16_t queue_index;
55
56 uint32_t last_cons;
57
58 /* separate cache line */
59 /* second cache line - fields only used in slow path */
60 MARKER cacheline1 __rte_cache_min_aligned;
61
62 volatile uint32_t prod_index; /* step 2 filled by FPGA */
63 } __rte_cache_aligned;
64
65
66 /* ************************************************************************* */
67 static int
68 eth_ark_rx_hw_setup(struct rte_eth_dev *dev,
69 struct ark_rx_queue *queue,
70 uint16_t rx_queue_id __rte_unused, uint16_t rx_queue_idx)
71 {
72 rte_iova_t queue_base;
73 rte_iova_t phys_addr_q_base;
74 rte_iova_t phys_addr_prod_index;
75
76 queue_base = rte_malloc_virt2iova(queue);
77 phys_addr_prod_index = queue_base +
78 offsetof(struct ark_rx_queue, prod_index);
79
80 phys_addr_q_base = rte_malloc_virt2iova(queue->paddress_q);
81
82 /* Verify HW */
83 if (ark_mpu_verify(queue->mpu, sizeof(rte_iova_t))) {
84 PMD_DRV_LOG(ERR, "Illegal configuration rx queue\n");
85 return -1;
86 }
87
88 /* Stop and Reset and configure MPU */
89 ark_mpu_configure(queue->mpu, phys_addr_q_base, queue->queue_size, 0);
90
91 ark_udm_write_addr(queue->udm, phys_addr_prod_index);
92
93 /* advance the valid pointer, but don't start until the queue starts */
94 ark_mpu_reset_stats(queue->mpu);
95
96 /* The seed is the producer index for the HW */
97 ark_mpu_set_producer(queue->mpu, queue->seed_index);
98 dev->data->rx_queue_state[rx_queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
99
100 return 0;
101 }
102
103 static inline void
104 eth_ark_rx_update_cons_index(struct ark_rx_queue *queue, uint32_t cons_index)
105 {
106 queue->cons_index = cons_index;
107 eth_ark_rx_seed_mbufs(queue);
108 if (((cons_index - queue->last_cons) >= 64U)) {
109 queue->last_cons = cons_index;
110 ark_mpu_set_producer(queue->mpu, queue->seed_index);
111 }
112 }
113
114 /* ************************************************************************* */
115 int
116 eth_ark_dev_rx_queue_setup(struct rte_eth_dev *dev,
117 uint16_t queue_idx,
118 uint16_t nb_desc,
119 unsigned int socket_id,
120 const struct rte_eth_rxconf *rx_conf,
121 struct rte_mempool *mb_pool)
122 {
123 static int warning1; /* = 0 */
124 struct ark_adapter *ark = (struct ark_adapter *)dev->data->dev_private;
125
126 struct ark_rx_queue *queue;
127 uint32_t i;
128 int status;
129
130 /* Future works: divide the Q's evenly with multi-ports */
131 int port = dev->data->port_id;
132 int qidx = port + queue_idx;
133
134 /* We may already be setup, free memory prior to re-allocation */
135 if (dev->data->rx_queues[queue_idx] != NULL) {
136 eth_ark_dev_rx_queue_release(dev->data->rx_queues[queue_idx]);
137 dev->data->rx_queues[queue_idx] = NULL;
138 }
139
140 if (rx_conf != NULL && warning1 == 0) {
141 warning1 = 1;
142 PMD_DRV_LOG(INFO,
143 "Arkville ignores rte_eth_rxconf argument.\n");
144 }
145
146 if (RTE_PKTMBUF_HEADROOM < ARK_RX_META_SIZE) {
147 PMD_DRV_LOG(ERR,
148 "Error: DPDK Arkville requires head room > %d bytes (%s)\n",
149 ARK_RX_META_SIZE, __func__);
150 return -1; /* ERROR CODE */
151 }
152
153 if (!rte_is_power_of_2(nb_desc)) {
154 PMD_DRV_LOG(ERR,
155 "DPDK Arkville configuration queue size must be power of two %u (%s)\n",
156 nb_desc, __func__);
157 return -1; /* ERROR CODE */
158 }
159
160 /* Allocate queue struct */
161 queue = rte_zmalloc_socket("Ark_rxqueue",
162 sizeof(struct ark_rx_queue),
163 64,
164 socket_id);
165 if (queue == 0) {
166 PMD_DRV_LOG(ERR, "Failed to allocate memory in %s\n", __func__);
167 return -ENOMEM;
168 }
169
170 /* NOTE zmalloc is used, no need to 0 indexes, etc. */
171 queue->mb_pool = mb_pool;
172 queue->phys_qid = qidx;
173 queue->queue_index = queue_idx;
174 queue->queue_size = nb_desc;
175 queue->queue_mask = nb_desc - 1;
176
177 queue->reserve_q =
178 rte_zmalloc_socket("Ark_rx_queue mbuf",
179 nb_desc * sizeof(struct rte_mbuf *),
180 64,
181 socket_id);
182 queue->paddress_q =
183 rte_zmalloc_socket("Ark_rx_queue paddr",
184 nb_desc * sizeof(rte_iova_t),
185 64,
186 socket_id);
187
188 if (queue->reserve_q == 0 || queue->paddress_q == 0) {
189 PMD_DRV_LOG(ERR,
190 "Failed to allocate queue memory in %s\n",
191 __func__);
192 rte_free(queue->reserve_q);
193 rte_free(queue->paddress_q);
194 rte_free(queue);
195 return -ENOMEM;
196 }
197
198 dev->data->rx_queues[queue_idx] = queue;
199 queue->udm = RTE_PTR_ADD(ark->udm.v, qidx * ARK_UDM_QOFFSET);
200 queue->mpu = RTE_PTR_ADD(ark->mpurx.v, qidx * ARK_MPU_QOFFSET);
201
202 /* populate mbuf reserve */
203 status = eth_ark_rx_seed_mbufs(queue);
204
205 if (queue->seed_index != nb_desc) {
206 PMD_DRV_LOG(ERR, "ARK: Failed to allocate %u mbufs for RX queue %d\n",
207 nb_desc, qidx);
208 status = -1;
209 }
210 /* MPU Setup */
211 if (status == 0)
212 status = eth_ark_rx_hw_setup(dev, queue, qidx, queue_idx);
213
214 if (unlikely(status != 0)) {
215 struct rte_mbuf **mbuf;
216
217 PMD_DRV_LOG(ERR, "Failed to initialize RX queue %d %s\n",
218 qidx,
219 __func__);
220 /* Free the mbufs allocated */
221 for (i = 0, mbuf = queue->reserve_q;
222 i < queue->seed_index; ++i, mbuf++) {
223 rte_pktmbuf_free(*mbuf);
224 }
225 rte_free(queue->reserve_q);
226 rte_free(queue->paddress_q);
227 rte_free(queue);
228 return -1; /* ERROR CODE */
229 }
230
231 return 0;
232 }
233
234 /* ************************************************************************* */
235 uint16_t
236 eth_ark_recv_pkts_noop(void *rx_queue __rte_unused,
237 struct rte_mbuf **rx_pkts __rte_unused,
238 uint16_t nb_pkts __rte_unused)
239 {
240 return 0;
241 }
242
243 /* ************************************************************************* */
244 uint16_t
245 eth_ark_recv_pkts(void *rx_queue,
246 struct rte_mbuf **rx_pkts,
247 uint16_t nb_pkts)
248 {
249 struct ark_rx_queue *queue;
250 register uint32_t cons_index, prod_index;
251 uint16_t nb;
252 struct rte_mbuf *mbuf;
253 struct ark_rx_meta *meta;
254
255 queue = (struct ark_rx_queue *)rx_queue;
256 if (unlikely(queue == 0))
257 return 0;
258 if (unlikely(nb_pkts == 0))
259 return 0;
260 prod_index = queue->prod_index;
261 cons_index = queue->cons_index;
262 nb = 0;
263
264 while (prod_index != cons_index) {
265 mbuf = queue->reserve_q[cons_index & queue->queue_mask];
266 /* prefetch mbuf */
267 rte_mbuf_prefetch_part1(mbuf);
268 rte_mbuf_prefetch_part2(mbuf);
269
270 /* META DATA embedded in headroom */
271 meta = RTE_PTR_ADD(mbuf->buf_addr, ARK_RX_META_OFFSET);
272
273 mbuf->port = meta->port;
274 mbuf->pkt_len = meta->pkt_len;
275 mbuf->data_len = meta->pkt_len;
276 mbuf->timestamp = meta->timestamp;
277 mbuf->udata64 = meta->user_data;
278
279 if (ARK_RX_DEBUG) { /* debug sanity checks */
280 if ((meta->pkt_len > (1024 * 16)) ||
281 (meta->pkt_len == 0)) {
282 PMD_RX_LOG(DEBUG, "RX: Bad Meta Q: %u"
283 " cons: %" PRIU32
284 " prod: %" PRIU32
285 " seed_index %" PRIU32
286 "\n",
287 queue->phys_qid,
288 cons_index,
289 queue->prod_index,
290 queue->seed_index);
291
292
293 PMD_RX_LOG(DEBUG, " : UDM"
294 " prod: %" PRIU32
295 " len: %u\n",
296 queue->udm->rt_cfg.prod_idx,
297 meta->pkt_len);
298 ark_mpu_dump(queue->mpu,
299 " ",
300 queue->phys_qid);
301 dump_mbuf_data(mbuf, 0, 256);
302 /* its FUBAR so fix it */
303 mbuf->pkt_len = 63;
304 meta->pkt_len = 63;
305 }
306 /* seqn is only set under debug */
307 mbuf->seqn = cons_index;
308 }
309
310 if (unlikely(meta->pkt_len > ARK_RX_MAX_NOCHAIN))
311 cons_index = eth_ark_rx_jumbo
312 (queue, meta, mbuf, cons_index + 1);
313 else
314 cons_index += 1;
315
316 rx_pkts[nb] = mbuf;
317 nb++;
318 if (nb >= nb_pkts)
319 break;
320 }
321
322 if (unlikely(nb != 0))
323 /* report next free to FPGA */
324 eth_ark_rx_update_cons_index(queue, cons_index);
325
326 return nb;
327 }
328
329 /* ************************************************************************* */
330 static uint32_t
331 eth_ark_rx_jumbo(struct ark_rx_queue *queue,
332 struct ark_rx_meta *meta,
333 struct rte_mbuf *mbuf0,
334 uint32_t cons_index)
335 {
336 struct rte_mbuf *mbuf_prev;
337 struct rte_mbuf *mbuf;
338
339 uint16_t remaining;
340 uint16_t data_len;
341 uint16_t segments;
342
343 /* first buf populated by called */
344 mbuf_prev = mbuf0;
345 segments = 1;
346 data_len = RTE_MIN(meta->pkt_len, RTE_MBUF_DEFAULT_DATAROOM);
347 remaining = meta->pkt_len - data_len;
348 mbuf0->data_len = data_len;
349
350 /* HW guarantees that the data does not exceed prod_index! */
351 while (remaining != 0) {
352 data_len = RTE_MIN(remaining,
353 RTE_MBUF_DEFAULT_DATAROOM +
354 RTE_PKTMBUF_HEADROOM);
355
356 remaining -= data_len;
357 segments += 1;
358
359 mbuf = queue->reserve_q[cons_index & queue->queue_mask];
360 mbuf_prev->next = mbuf;
361 mbuf_prev = mbuf;
362 mbuf->data_len = data_len;
363 mbuf->data_off = 0;
364 if (ARK_RX_DEBUG)
365 mbuf->seqn = cons_index; /* for debug only */
366
367 cons_index += 1;
368 }
369
370 mbuf0->nb_segs = segments;
371 return cons_index;
372 }
373
374 /* Drain the internal queue allowing hw to clear out. */
375 static void
376 eth_ark_rx_queue_drain(struct ark_rx_queue *queue)
377 {
378 register uint32_t cons_index;
379 struct rte_mbuf *mbuf;
380
381 cons_index = queue->cons_index;
382
383 /* NOT performance optimized, since this is a one-shot call */
384 while ((cons_index ^ queue->prod_index) & queue->queue_mask) {
385 mbuf = queue->reserve_q[cons_index & queue->queue_mask];
386 rte_pktmbuf_free(mbuf);
387 cons_index++;
388 eth_ark_rx_update_cons_index(queue, cons_index);
389 }
390 }
391
392 uint32_t
393 eth_ark_dev_rx_queue_count(struct rte_eth_dev *dev, uint16_t queue_id)
394 {
395 struct ark_rx_queue *queue;
396
397 queue = dev->data->rx_queues[queue_id];
398 return (queue->prod_index - queue->cons_index); /* mod arith */
399 }
400
401 /* ************************************************************************* */
402 int
403 eth_ark_rx_start_queue(struct rte_eth_dev *dev, uint16_t queue_id)
404 {
405 struct ark_rx_queue *queue;
406
407 queue = dev->data->rx_queues[queue_id];
408 if (queue == 0)
409 return -1;
410
411 dev->data->rx_queue_state[queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
412
413 ark_mpu_set_producer(queue->mpu, queue->seed_index);
414 ark_mpu_start(queue->mpu);
415
416 ark_udm_queue_enable(queue->udm, 1);
417
418 return 0;
419 }
420
421 /* ************************************************************************* */
422
423 /* Queue can be restarted. data remains
424 */
425 int
426 eth_ark_rx_stop_queue(struct rte_eth_dev *dev, uint16_t queue_id)
427 {
428 struct ark_rx_queue *queue;
429
430 queue = dev->data->rx_queues[queue_id];
431 if (queue == 0)
432 return -1;
433
434 ark_udm_queue_enable(queue->udm, 0);
435
436 dev->data->rx_queue_state[queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
437
438 return 0;
439 }
440
441 /* ************************************************************************* */
442 static inline int
443 eth_ark_rx_seed_mbufs(struct ark_rx_queue *queue)
444 {
445 uint32_t limit = queue->cons_index + queue->queue_size;
446 uint32_t seed_index = queue->seed_index;
447
448 uint32_t count = 0;
449 uint32_t seed_m = queue->seed_index & queue->queue_mask;
450
451 uint32_t nb = limit - seed_index;
452
453 /* Handle wrap around -- remainder is filled on the next call */
454 if (unlikely(seed_m + nb > queue->queue_size))
455 nb = queue->queue_size - seed_m;
456
457 struct rte_mbuf **mbufs = &queue->reserve_q[seed_m];
458 int status = rte_pktmbuf_alloc_bulk(queue->mb_pool, mbufs, nb);
459
460 if (unlikely(status != 0)) {
461 /* Try to recover from lack of mbufs in pool */
462 status = eth_ark_rx_seed_recovery(queue, &nb, mbufs);
463 if (unlikely(status != 0)) {
464 return -1;
465 }
466 }
467
468 if (ARK_RX_DEBUG) { /* DEBUG */
469 while (count != nb) {
470 struct rte_mbuf *mbuf_init =
471 queue->reserve_q[seed_m + count];
472
473 memset(mbuf_init->buf_addr, -1, 512);
474 *((uint32_t *)mbuf_init->buf_addr) =
475 seed_index + count;
476 *(uint16_t *)RTE_PTR_ADD(mbuf_init->buf_addr, 4) =
477 queue->phys_qid;
478 count++;
479 }
480 count = 0;
481 } /* DEBUG */
482 queue->seed_index += nb;
483
484 /* Duff's device https://en.wikipedia.org/wiki/Duff's_device */
485 switch (nb % 4) {
486 case 0:
487 while (count != nb) {
488 queue->paddress_q[seed_m++] =
489 (*mbufs++)->buf_iova;
490 count++;
491 /* FALLTHROUGH */
492 case 3:
493 queue->paddress_q[seed_m++] =
494 (*mbufs++)->buf_iova;
495 count++;
496 /* FALLTHROUGH */
497 case 2:
498 queue->paddress_q[seed_m++] =
499 (*mbufs++)->buf_iova;
500 count++;
501 /* FALLTHROUGH */
502 case 1:
503 queue->paddress_q[seed_m++] =
504 (*mbufs++)->buf_iova;
505 count++;
506 /* FALLTHROUGH */
507
508 } /* while (count != nb) */
509 } /* switch */
510
511 return 0;
512 }
513
514 int
515 eth_ark_rx_seed_recovery(struct ark_rx_queue *queue,
516 uint32_t *pnb,
517 struct rte_mbuf **mbufs)
518 {
519 int status = -1;
520
521 /* Ignore small allocation failures */
522 if (*pnb <= 64)
523 return -1;
524
525 *pnb = 64U;
526 status = rte_pktmbuf_alloc_bulk(queue->mb_pool, mbufs, *pnb);
527 if (status != 0) {
528 PMD_DRV_LOG(ERR,
529 "ARK: Could not allocate %u mbufs from pool for RX queue %u;"
530 " %u free buffers remaining in queue\n",
531 *pnb, queue->queue_index,
532 queue->seed_index - queue->cons_index);
533 }
534 return status;
535 }
536
537 void
538 eth_ark_rx_dump_queue(struct rte_eth_dev *dev, uint16_t queue_id,
539 const char *msg)
540 {
541 struct ark_rx_queue *queue;
542
543 queue = dev->data->rx_queues[queue_id];
544
545 ark_ethdev_rx_dump(msg, queue);
546 }
547
548 /* ************************************************************************* */
549 /* Call on device closed no user API, queue is stopped */
550 void
551 eth_ark_dev_rx_queue_release(void *vqueue)
552 {
553 struct ark_rx_queue *queue;
554 uint32_t i;
555
556 queue = (struct ark_rx_queue *)vqueue;
557 if (queue == 0)
558 return;
559
560 ark_udm_queue_enable(queue->udm, 0);
561 /* Stop the MPU since pointer are going away */
562 ark_mpu_stop(queue->mpu);
563
564 /* Need to clear out mbufs here, dropping packets along the way */
565 eth_ark_rx_queue_drain(queue);
566
567 for (i = 0; i < queue->queue_size; ++i)
568 rte_pktmbuf_free(queue->reserve_q[i]);
569
570 rte_free(queue->reserve_q);
571 rte_free(queue->paddress_q);
572 rte_free(queue);
573 }
574
575 void
576 eth_rx_queue_stats_get(void *vqueue, struct rte_eth_stats *stats)
577 {
578 struct ark_rx_queue *queue;
579 struct ark_udm_t *udm;
580
581 queue = vqueue;
582 if (queue == 0)
583 return;
584 udm = queue->udm;
585
586 uint64_t ibytes = ark_udm_bytes(udm);
587 uint64_t ipackets = ark_udm_packets(udm);
588 uint64_t idropped = ark_udm_dropped(queue->udm);
589
590 stats->q_ipackets[queue->queue_index] = ipackets;
591 stats->q_ibytes[queue->queue_index] = ibytes;
592 stats->q_errors[queue->queue_index] = idropped;
593 stats->ipackets += ipackets;
594 stats->ibytes += ibytes;
595 stats->imissed += idropped;
596 }
597
598 void
599 eth_rx_queue_stats_reset(void *vqueue)
600 {
601 struct ark_rx_queue *queue;
602
603 queue = vqueue;
604 if (queue == 0)
605 return;
606
607 ark_mpu_reset_stats(queue->mpu);
608 ark_udm_queue_stats_reset(queue->udm);
609 }
610
611 void
612 eth_ark_udm_force_close(struct rte_eth_dev *dev)
613 {
614 struct ark_adapter *ark = (struct ark_adapter *)dev->data->dev_private;
615 struct ark_rx_queue *queue;
616 uint32_t index;
617 uint16_t i;
618
619 if (!ark_udm_is_flushed(ark->udm.v)) {
620 /* restart the MPUs */
621 PMD_DRV_LOG(ERR, "ARK: %s UDM not flushed\n", __func__);
622 for (i = 0; i < dev->data->nb_rx_queues; i++) {
623 queue = (struct ark_rx_queue *)dev->data->rx_queues[i];
624 if (queue == 0)
625 continue;
626
627 ark_mpu_start(queue->mpu);
628 /* Add some buffers */
629 index = 100000 + queue->seed_index;
630 ark_mpu_set_producer(queue->mpu, index);
631 }
632 /* Wait to allow data to pass */
633 usleep(100);
634
635 PMD_DEBUG_LOG(DEBUG, "UDM forced flush attempt, stopped = %d\n",
636 ark_udm_is_flushed(ark->udm.v));
637 }
638 ark_udm_reset(ark->udm.v);
639 }
640
641 static void
642 ark_ethdev_rx_dump(const char *name, struct ark_rx_queue *queue)
643 {
644 if (queue == NULL)
645 return;
646 PMD_DEBUG_LOG(DEBUG, "RX QUEUE %d -- %s", queue->phys_qid, name);
647 PMD_DEBUG_LOG(DEBUG, ARK_SU32 ARK_SU32 ARK_SU32 ARK_SU32 "\n",
648 "queue_size", queue->queue_size,
649 "seed_index", queue->seed_index,
650 "prod_index", queue->prod_index,
651 "cons_index", queue->cons_index);
652
653 ark_mpu_dump(queue->mpu, name, queue->phys_qid);
654 ark_mpu_dump_setup(queue->mpu, queue->phys_qid);
655 ark_udm_dump(queue->udm, name);
656 ark_udm_dump_setup(queue->udm, queue->phys_qid);
657 }
658
659 /* Only used in debug.
660 * This function is a raw memory dump of a portion of an mbuf's memory
661 * region. The usual function, rte_pktmbuf_dump() only shows data
662 * with respect to the data_off field. This function show data
663 * anywhere in the mbuf's buffer. This is useful for examining
664 * data in the headroom or tailroom portion of an mbuf.
665 */
666 static void
667 dump_mbuf_data(struct rte_mbuf *mbuf, uint16_t lo, uint16_t hi)
668 {
669 uint16_t i, j;
670
671 PMD_DRV_LOG(INFO, " MBUF: %p len %d, off: %d, seq: %" PRIU32 "\n", mbuf,
672 mbuf->pkt_len, mbuf->data_off, mbuf->seqn);
673 for (i = lo; i < hi; i += 16) {
674 uint8_t *dp = RTE_PTR_ADD(mbuf->buf_addr, i);
675
676 PMD_DRV_LOG(INFO, " %6d: ", i);
677 for (j = 0; j < 16; j++)
678 PMD_DRV_LOG(INFO, " %02x", dp[j]);
679
680 PMD_DRV_LOG(INFO, "\n");
681 }
682 }