1 /* SPDX-License-Identifier: BSD-3-Clause
2 *
3 * Copyright(c) 2019-2021 Xilinx, Inc.
4 * Copyright(c) 2016-2019 Solarflare Communications Inc.
5 *
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
8 */
9
10 #include <rte_debug.h>
11 #include <rte_cycles.h>
12 #include <rte_alarm.h>
13 #include <rte_branch_prediction.h>
14
15 #include "efx.h"
16
17 #include "sfc.h"
18 #include "sfc_debug.h"
19 #include "sfc_log.h"
20 #include "sfc_ev.h"
21 #include "sfc_rx.h"
22 #include "sfc_tx.h"
23 #include "sfc_kvargs.h"
24
25
26 /* Initial delay when waiting for event queue init complete event */
27 #define SFC_EVQ_INIT_BACKOFF_START_US (1)
28 /* Maximum delay between event queue polling attempts */
29 #define SFC_EVQ_INIT_BACKOFF_MAX_US (10 * 1000)
30 /* Event queue init approx timeout */
31 #define SFC_EVQ_INIT_TIMEOUT_US (2 * US_PER_S)
32
33 /* Management event queue polling period in microseconds */
34 #define SFC_MGMT_EV_QPOLL_PERIOD_US (US_PER_S)
35
36 static const char *
sfc_evq_type2str(enum sfc_evq_type type)37 sfc_evq_type2str(enum sfc_evq_type type)
38 {
39 switch (type) {
40 case SFC_EVQ_TYPE_MGMT:
41 return "mgmt-evq";
42 case SFC_EVQ_TYPE_RX:
43 return "rx-evq";
44 case SFC_EVQ_TYPE_TX:
45 return "tx-evq";
46 default:
47 SFC_ASSERT(B_FALSE);
48 return NULL;
49 }
50 }
51
52 static boolean_t
sfc_ev_initialized(void * arg)53 sfc_ev_initialized(void *arg)
54 {
55 struct sfc_evq *evq = arg;
56
57 /* Init done events may be duplicated on SFN7xxx (SFC bug 31631) */
58 SFC_ASSERT(evq->init_state == SFC_EVQ_STARTING ||
59 evq->init_state == SFC_EVQ_STARTED);
60
61 evq->init_state = SFC_EVQ_STARTED;
62
63 return B_FALSE;
64 }
65
66 static boolean_t
sfc_ev_nop_rx(void * arg,uint32_t label,uint32_t id,uint32_t size,uint16_t flags)67 sfc_ev_nop_rx(void *arg, uint32_t label, uint32_t id,
68 uint32_t size, uint16_t flags)
69 {
70 struct sfc_evq *evq = arg;
71
72 sfc_err(evq->sa,
73 "EVQ %u unexpected Rx event label=%u id=%#x size=%u flags=%#x",
74 evq->evq_index, label, id, size, flags);
75 return B_TRUE;
76 }
77
78 static boolean_t
sfc_ev_efx_rx(void * arg,__rte_unused uint32_t label,uint32_t id,uint32_t size,uint16_t flags)79 sfc_ev_efx_rx(void *arg, __rte_unused uint32_t label, uint32_t id,
80 uint32_t size, uint16_t flags)
81 {
82 struct sfc_evq *evq = arg;
83 struct sfc_efx_rxq *rxq;
84 unsigned int stop;
85 unsigned int pending_id;
86 unsigned int delta;
87 unsigned int i;
88 struct sfc_efx_rx_sw_desc *rxd;
89
90 if (unlikely(evq->exception))
91 goto done;
92
93 rxq = sfc_efx_rxq_by_dp_rxq(evq->dp_rxq);
94
95 SFC_ASSERT(rxq != NULL);
96 SFC_ASSERT(rxq->evq == evq);
97 SFC_ASSERT(rxq->flags & SFC_EFX_RXQ_FLAG_STARTED);
98
99 stop = (id + 1) & rxq->ptr_mask;
100 pending_id = rxq->pending & rxq->ptr_mask;
101 delta = (stop >= pending_id) ? (stop - pending_id) :
102 (rxq->ptr_mask + 1 - pending_id + stop);
103
104 if (delta == 0) {
105 /*
106 * Rx event with no new descriptors done and zero length
107 * is used to abort scattered packet when there is no room
108 * for the tail.
109 */
110 if (unlikely(size != 0)) {
111 evq->exception = B_TRUE;
112 sfc_err(evq->sa,
113 "EVQ %u RxQ %u invalid RX abort "
114 "(id=%#x size=%u flags=%#x); needs restart",
115 evq->evq_index, rxq->dp.dpq.queue_id,
116 id, size, flags);
117 goto done;
118 }
119
120 /* Add discard flag to the first fragment */
121 rxq->sw_desc[pending_id].flags |= EFX_DISCARD;
122 /* Remove continue flag from the last fragment */
123 rxq->sw_desc[id].flags &= ~EFX_PKT_CONT;
124 } else if (unlikely(delta > rxq->batch_max)) {
125 evq->exception = B_TRUE;
126
127 sfc_err(evq->sa,
128 "EVQ %u RxQ %u completion out of order "
129 "(id=%#x delta=%u flags=%#x); needs restart",
130 evq->evq_index, rxq->dp.dpq.queue_id,
131 id, delta, flags);
132
133 goto done;
134 }
135
136 for (i = pending_id; i != stop; i = (i + 1) & rxq->ptr_mask) {
137 rxd = &rxq->sw_desc[i];
138
139 rxd->flags = flags;
140
141 SFC_ASSERT(size < (1 << 16));
142 rxd->size = (uint16_t)size;
143 }
144
145 rxq->pending += delta;
146
147 done:
148 return B_FALSE;
149 }
150
151 static boolean_t
sfc_ev_dp_rx(void * arg,__rte_unused uint32_t label,uint32_t id,__rte_unused uint32_t size,__rte_unused uint16_t flags)152 sfc_ev_dp_rx(void *arg, __rte_unused uint32_t label, uint32_t id,
153 __rte_unused uint32_t size, __rte_unused uint16_t flags)
154 {
155 struct sfc_evq *evq = arg;
156 struct sfc_dp_rxq *dp_rxq;
157
158 dp_rxq = evq->dp_rxq;
159 SFC_ASSERT(dp_rxq != NULL);
160
161 SFC_ASSERT(evq->sa->priv.dp_rx->qrx_ev != NULL);
162 return evq->sa->priv.dp_rx->qrx_ev(dp_rxq, id);
163 }
164
165 static boolean_t
sfc_ev_nop_rx_packets(void * arg,uint32_t label,unsigned int num_packets,uint32_t flags)166 sfc_ev_nop_rx_packets(void *arg, uint32_t label, unsigned int num_packets,
167 uint32_t flags)
168 {
169 struct sfc_evq *evq = arg;
170
171 sfc_err(evq->sa,
172 "EVQ %u unexpected Rx packets event label=%u num=%u flags=%#x",
173 evq->evq_index, label, num_packets, flags);
174 return B_TRUE;
175 }
176
177 static boolean_t
sfc_ev_dp_rx_packets(void * arg,__rte_unused uint32_t label,unsigned int num_packets,__rte_unused uint32_t flags)178 sfc_ev_dp_rx_packets(void *arg, __rte_unused uint32_t label,
179 unsigned int num_packets, __rte_unused uint32_t flags)
180 {
181 struct sfc_evq *evq = arg;
182 struct sfc_dp_rxq *dp_rxq;
183
184 dp_rxq = evq->dp_rxq;
185 SFC_ASSERT(dp_rxq != NULL);
186
187 SFC_ASSERT(evq->sa->priv.dp_rx->qrx_ev != NULL);
188 return evq->sa->priv.dp_rx->qrx_ev(dp_rxq, num_packets);
189 }
190
191 static boolean_t
sfc_ev_nop_rx_ps(void * arg,uint32_t label,uint32_t id,uint32_t pkt_count,uint16_t flags)192 sfc_ev_nop_rx_ps(void *arg, uint32_t label, uint32_t id,
193 uint32_t pkt_count, uint16_t flags)
194 {
195 struct sfc_evq *evq = arg;
196
197 sfc_err(evq->sa,
198 "EVQ %u unexpected packed stream Rx event label=%u id=%#x pkt_count=%u flags=%#x",
199 evq->evq_index, label, id, pkt_count, flags);
200 return B_TRUE;
201 }
202
203 /* It is not actually used on datapath, but required on RxQ flush */
204 static boolean_t
sfc_ev_dp_rx_ps(void * arg,__rte_unused uint32_t label,uint32_t id,__rte_unused uint32_t pkt_count,__rte_unused uint16_t flags)205 sfc_ev_dp_rx_ps(void *arg, __rte_unused uint32_t label, uint32_t id,
206 __rte_unused uint32_t pkt_count, __rte_unused uint16_t flags)
207 {
208 struct sfc_evq *evq = arg;
209 struct sfc_dp_rxq *dp_rxq;
210
211 dp_rxq = evq->dp_rxq;
212 SFC_ASSERT(dp_rxq != NULL);
213
214 if (evq->sa->priv.dp_rx->qrx_ps_ev != NULL)
215 return evq->sa->priv.dp_rx->qrx_ps_ev(dp_rxq, id);
216 else
217 return B_FALSE;
218 }
219
220 static boolean_t
sfc_ev_nop_tx(void * arg,uint32_t label,uint32_t id)221 sfc_ev_nop_tx(void *arg, uint32_t label, uint32_t id)
222 {
223 struct sfc_evq *evq = arg;
224
225 sfc_err(evq->sa, "EVQ %u unexpected Tx event label=%u id=%#x",
226 evq->evq_index, label, id);
227 return B_TRUE;
228 }
229
230 static boolean_t
sfc_ev_tx(void * arg,__rte_unused uint32_t label,uint32_t id)231 sfc_ev_tx(void *arg, __rte_unused uint32_t label, uint32_t id)
232 {
233 struct sfc_evq *evq = arg;
234 struct sfc_dp_txq *dp_txq;
235 struct sfc_efx_txq *txq;
236 unsigned int stop;
237 unsigned int delta;
238
239 dp_txq = evq->dp_txq;
240 SFC_ASSERT(dp_txq != NULL);
241
242 txq = sfc_efx_txq_by_dp_txq(dp_txq);
243 SFC_ASSERT(txq->evq == evq);
244
245 if (unlikely((txq->flags & SFC_EFX_TXQ_FLAG_STARTED) == 0))
246 goto done;
247
248 stop = (id + 1) & txq->ptr_mask;
249 id = txq->pending & txq->ptr_mask;
250
251 delta = (stop >= id) ? (stop - id) : (txq->ptr_mask + 1 - id + stop);
252
253 txq->pending += delta;
254
255 done:
256 return B_FALSE;
257 }
258
259 static boolean_t
sfc_ev_dp_tx(void * arg,__rte_unused uint32_t label,uint32_t id)260 sfc_ev_dp_tx(void *arg, __rte_unused uint32_t label, uint32_t id)
261 {
262 struct sfc_evq *evq = arg;
263 struct sfc_dp_txq *dp_txq;
264
265 dp_txq = evq->dp_txq;
266 SFC_ASSERT(dp_txq != NULL);
267
268 SFC_ASSERT(evq->sa->priv.dp_tx->qtx_ev != NULL);
269 return evq->sa->priv.dp_tx->qtx_ev(dp_txq, id);
270 }
271
272 static boolean_t
sfc_ev_nop_tx_ndescs(void * arg,uint32_t label,unsigned int ndescs)273 sfc_ev_nop_tx_ndescs(void *arg, uint32_t label, unsigned int ndescs)
274 {
275 struct sfc_evq *evq = arg;
276
277 sfc_err(evq->sa, "EVQ %u unexpected Tx event label=%u ndescs=%#x",
278 evq->evq_index, label, ndescs);
279 return B_TRUE;
280 }
281
282 static boolean_t
sfc_ev_dp_tx_ndescs(void * arg,__rte_unused uint32_t label,unsigned int ndescs)283 sfc_ev_dp_tx_ndescs(void *arg, __rte_unused uint32_t label,
284 unsigned int ndescs)
285 {
286 struct sfc_evq *evq = arg;
287 struct sfc_dp_txq *dp_txq;
288
289 dp_txq = evq->dp_txq;
290 SFC_ASSERT(dp_txq != NULL);
291
292 SFC_ASSERT(evq->sa->priv.dp_tx->qtx_ev != NULL);
293 return evq->sa->priv.dp_tx->qtx_ev(dp_txq, ndescs);
294 }
295
296 static boolean_t
sfc_ev_exception(void * arg,uint32_t code,__rte_unused uint32_t data)297 sfc_ev_exception(void *arg, uint32_t code, __rte_unused uint32_t data)
298 {
299 struct sfc_evq *evq = arg;
300
301 if (code == EFX_EXCEPTION_UNKNOWN_SENSOREVT)
302 return B_FALSE;
303
304 evq->exception = B_TRUE;
305 sfc_warn(evq->sa,
306 "hardware exception %s (code=%u, data=%#x) on EVQ %u;"
307 " needs recovery",
308 (code == EFX_EXCEPTION_RX_RECOVERY) ? "RX_RECOVERY" :
309 (code == EFX_EXCEPTION_RX_DSC_ERROR) ? "RX_DSC_ERROR" :
310 (code == EFX_EXCEPTION_TX_DSC_ERROR) ? "TX_DSC_ERROR" :
311 (code == EFX_EXCEPTION_FWALERT_SRAM) ? "FWALERT_SRAM" :
312 (code == EFX_EXCEPTION_UNKNOWN_FWALERT) ? "UNKNOWN_FWALERT" :
313 (code == EFX_EXCEPTION_RX_ERROR) ? "RX_ERROR" :
314 (code == EFX_EXCEPTION_TX_ERROR) ? "TX_ERROR" :
315 (code == EFX_EXCEPTION_EV_ERROR) ? "EV_ERROR" :
316 "UNKNOWN",
317 code, data, evq->evq_index);
318
319 return B_TRUE;
320 }
321
322 static boolean_t
sfc_ev_nop_rxq_flush_done(void * arg,uint32_t rxq_hw_index)323 sfc_ev_nop_rxq_flush_done(void *arg, uint32_t rxq_hw_index)
324 {
325 struct sfc_evq *evq = arg;
326
327 sfc_err(evq->sa, "EVQ %u unexpected RxQ %u flush done",
328 evq->evq_index, rxq_hw_index);
329 return B_TRUE;
330 }
331
332 static boolean_t
sfc_ev_rxq_flush_done(void * arg,__rte_unused uint32_t rxq_hw_index)333 sfc_ev_rxq_flush_done(void *arg, __rte_unused uint32_t rxq_hw_index)
334 {
335 struct sfc_evq *evq = arg;
336 struct sfc_dp_rxq *dp_rxq;
337 struct sfc_rxq *rxq;
338
339 dp_rxq = evq->dp_rxq;
340 SFC_ASSERT(dp_rxq != NULL);
341
342 rxq = sfc_rxq_by_dp_rxq(dp_rxq);
343 SFC_ASSERT(rxq != NULL);
344 SFC_ASSERT(rxq->hw_index == rxq_hw_index);
345 SFC_ASSERT(rxq->evq == evq);
346 RTE_SET_USED(rxq);
347
348 sfc_rx_qflush_done(sfc_rxq_info_by_dp_rxq(dp_rxq));
349
350 return B_FALSE;
351 }
352
353 static boolean_t
sfc_ev_nop_rxq_flush_failed(void * arg,uint32_t rxq_hw_index)354 sfc_ev_nop_rxq_flush_failed(void *arg, uint32_t rxq_hw_index)
355 {
356 struct sfc_evq *evq = arg;
357
358 sfc_err(evq->sa, "EVQ %u unexpected RxQ %u flush failed",
359 evq->evq_index, rxq_hw_index);
360 return B_TRUE;
361 }
362
363 static boolean_t
sfc_ev_rxq_flush_failed(void * arg,__rte_unused uint32_t rxq_hw_index)364 sfc_ev_rxq_flush_failed(void *arg, __rte_unused uint32_t rxq_hw_index)
365 {
366 struct sfc_evq *evq = arg;
367 struct sfc_dp_rxq *dp_rxq;
368 struct sfc_rxq *rxq;
369
370 dp_rxq = evq->dp_rxq;
371 SFC_ASSERT(dp_rxq != NULL);
372
373 rxq = sfc_rxq_by_dp_rxq(dp_rxq);
374 SFC_ASSERT(rxq != NULL);
375 SFC_ASSERT(rxq->hw_index == rxq_hw_index);
376 SFC_ASSERT(rxq->evq == evq);
377 RTE_SET_USED(rxq);
378
379 sfc_rx_qflush_failed(sfc_rxq_info_by_dp_rxq(dp_rxq));
380
381 return B_FALSE;
382 }
383
384 static boolean_t
sfc_ev_nop_txq_flush_done(void * arg,uint32_t txq_hw_index)385 sfc_ev_nop_txq_flush_done(void *arg, uint32_t txq_hw_index)
386 {
387 struct sfc_evq *evq = arg;
388
389 sfc_err(evq->sa, "EVQ %u unexpected TxQ %u flush done",
390 evq->evq_index, txq_hw_index);
391 return B_TRUE;
392 }
393
394 static boolean_t
sfc_ev_txq_flush_done(void * arg,__rte_unused uint32_t txq_hw_index)395 sfc_ev_txq_flush_done(void *arg, __rte_unused uint32_t txq_hw_index)
396 {
397 struct sfc_evq *evq = arg;
398 struct sfc_dp_txq *dp_txq;
399 struct sfc_txq *txq;
400
401 dp_txq = evq->dp_txq;
402 SFC_ASSERT(dp_txq != NULL);
403
404 txq = sfc_txq_by_dp_txq(dp_txq);
405 SFC_ASSERT(txq != NULL);
406 SFC_ASSERT(txq->hw_index == txq_hw_index);
407 SFC_ASSERT(txq->evq == evq);
408 RTE_SET_USED(txq);
409
410 sfc_tx_qflush_done(sfc_txq_info_by_dp_txq(dp_txq));
411
412 return B_FALSE;
413 }
414
415 static boolean_t
sfc_ev_software(void * arg,uint16_t magic)416 sfc_ev_software(void *arg, uint16_t magic)
417 {
418 struct sfc_evq *evq = arg;
419
420 sfc_err(evq->sa, "EVQ %u unexpected software event magic=%#.4x",
421 evq->evq_index, magic);
422 return B_TRUE;
423 }
424
425 static boolean_t
sfc_ev_sram(void * arg,uint32_t code)426 sfc_ev_sram(void *arg, uint32_t code)
427 {
428 struct sfc_evq *evq = arg;
429
430 sfc_err(evq->sa, "EVQ %u unexpected SRAM event code=%u",
431 evq->evq_index, code);
432 return B_TRUE;
433 }
434
435 static boolean_t
sfc_ev_wake_up(void * arg,uint32_t index)436 sfc_ev_wake_up(void *arg, uint32_t index)
437 {
438 struct sfc_evq *evq = arg;
439
440 sfc_err(evq->sa, "EVQ %u unexpected wake up event index=%u",
441 evq->evq_index, index);
442 return B_TRUE;
443 }
444
445 static boolean_t
sfc_ev_timer(void * arg,uint32_t index)446 sfc_ev_timer(void *arg, uint32_t index)
447 {
448 struct sfc_evq *evq = arg;
449
450 sfc_err(evq->sa, "EVQ %u unexpected timer event index=%u",
451 evq->evq_index, index);
452 return B_TRUE;
453 }
454
455 static boolean_t
sfc_ev_nop_link_change(void * arg,__rte_unused efx_link_mode_t link_mode)456 sfc_ev_nop_link_change(void *arg, __rte_unused efx_link_mode_t link_mode)
457 {
458 struct sfc_evq *evq = arg;
459
460 sfc_err(evq->sa, "EVQ %u unexpected link change event",
461 evq->evq_index);
462 return B_TRUE;
463 }
464
465 static boolean_t
sfc_ev_link_change(void * arg,efx_link_mode_t link_mode)466 sfc_ev_link_change(void *arg, efx_link_mode_t link_mode)
467 {
468 struct sfc_evq *evq = arg;
469 struct sfc_adapter *sa = evq->sa;
470 struct rte_eth_link new_link;
471
472 sfc_port_link_mode_to_info(link_mode, &new_link);
473 if (rte_eth_linkstatus_set(sa->eth_dev, &new_link) == 0)
474 evq->sa->port.lsc_seq++;
475
476 return B_FALSE;
477 }
478
479 static const efx_ev_callbacks_t sfc_ev_callbacks = {
480 .eec_initialized = sfc_ev_initialized,
481 .eec_rx = sfc_ev_nop_rx,
482 .eec_rx_packets = sfc_ev_nop_rx_packets,
483 .eec_rx_ps = sfc_ev_nop_rx_ps,
484 .eec_tx = sfc_ev_nop_tx,
485 .eec_tx_ndescs = sfc_ev_nop_tx_ndescs,
486 .eec_exception = sfc_ev_exception,
487 .eec_rxq_flush_done = sfc_ev_nop_rxq_flush_done,
488 .eec_rxq_flush_failed = sfc_ev_nop_rxq_flush_failed,
489 .eec_txq_flush_done = sfc_ev_nop_txq_flush_done,
490 .eec_software = sfc_ev_software,
491 .eec_sram = sfc_ev_sram,
492 .eec_wake_up = sfc_ev_wake_up,
493 .eec_timer = sfc_ev_timer,
494 .eec_link_change = sfc_ev_link_change,
495 };
496
497 static const efx_ev_callbacks_t sfc_ev_callbacks_efx_rx = {
498 .eec_initialized = sfc_ev_initialized,
499 .eec_rx = sfc_ev_efx_rx,
500 .eec_rx_packets = sfc_ev_nop_rx_packets,
501 .eec_rx_ps = sfc_ev_nop_rx_ps,
502 .eec_tx = sfc_ev_nop_tx,
503 .eec_tx_ndescs = sfc_ev_nop_tx_ndescs,
504 .eec_exception = sfc_ev_exception,
505 .eec_rxq_flush_done = sfc_ev_rxq_flush_done,
506 .eec_rxq_flush_failed = sfc_ev_rxq_flush_failed,
507 .eec_txq_flush_done = sfc_ev_nop_txq_flush_done,
508 .eec_software = sfc_ev_software,
509 .eec_sram = sfc_ev_sram,
510 .eec_wake_up = sfc_ev_wake_up,
511 .eec_timer = sfc_ev_timer,
512 .eec_link_change = sfc_ev_nop_link_change,
513 };
514
515 static const efx_ev_callbacks_t sfc_ev_callbacks_dp_rx = {
516 .eec_initialized = sfc_ev_initialized,
517 .eec_rx = sfc_ev_dp_rx,
518 .eec_rx_packets = sfc_ev_dp_rx_packets,
519 .eec_rx_ps = sfc_ev_dp_rx_ps,
520 .eec_tx = sfc_ev_nop_tx,
521 .eec_tx_ndescs = sfc_ev_nop_tx_ndescs,
522 .eec_exception = sfc_ev_exception,
523 .eec_rxq_flush_done = sfc_ev_rxq_flush_done,
524 .eec_rxq_flush_failed = sfc_ev_rxq_flush_failed,
525 .eec_txq_flush_done = sfc_ev_nop_txq_flush_done,
526 .eec_software = sfc_ev_software,
527 .eec_sram = sfc_ev_sram,
528 .eec_wake_up = sfc_ev_wake_up,
529 .eec_timer = sfc_ev_timer,
530 .eec_link_change = sfc_ev_nop_link_change,
531 };
532
533 static const efx_ev_callbacks_t sfc_ev_callbacks_efx_tx = {
534 .eec_initialized = sfc_ev_initialized,
535 .eec_rx = sfc_ev_nop_rx,
536 .eec_rx_packets = sfc_ev_nop_rx_packets,
537 .eec_rx_ps = sfc_ev_nop_rx_ps,
538 .eec_tx = sfc_ev_tx,
539 .eec_tx_ndescs = sfc_ev_nop_tx_ndescs,
540 .eec_exception = sfc_ev_exception,
541 .eec_rxq_flush_done = sfc_ev_nop_rxq_flush_done,
542 .eec_rxq_flush_failed = sfc_ev_nop_rxq_flush_failed,
543 .eec_txq_flush_done = sfc_ev_txq_flush_done,
544 .eec_software = sfc_ev_software,
545 .eec_sram = sfc_ev_sram,
546 .eec_wake_up = sfc_ev_wake_up,
547 .eec_timer = sfc_ev_timer,
548 .eec_link_change = sfc_ev_nop_link_change,
549 };
550
551 static const efx_ev_callbacks_t sfc_ev_callbacks_dp_tx = {
552 .eec_initialized = sfc_ev_initialized,
553 .eec_rx = sfc_ev_nop_rx,
554 .eec_rx_packets = sfc_ev_nop_rx_packets,
555 .eec_rx_ps = sfc_ev_nop_rx_ps,
556 .eec_tx = sfc_ev_dp_tx,
557 .eec_tx_ndescs = sfc_ev_dp_tx_ndescs,
558 .eec_exception = sfc_ev_exception,
559 .eec_rxq_flush_done = sfc_ev_nop_rxq_flush_done,
560 .eec_rxq_flush_failed = sfc_ev_nop_rxq_flush_failed,
561 .eec_txq_flush_done = sfc_ev_txq_flush_done,
562 .eec_software = sfc_ev_software,
563 .eec_sram = sfc_ev_sram,
564 .eec_wake_up = sfc_ev_wake_up,
565 .eec_timer = sfc_ev_timer,
566 .eec_link_change = sfc_ev_nop_link_change,
567 };
568
569
570 void
sfc_ev_qpoll(struct sfc_evq * evq)571 sfc_ev_qpoll(struct sfc_evq *evq)
572 {
573 struct sfc_adapter *sa;
574
575 SFC_ASSERT(evq->init_state == SFC_EVQ_STARTED ||
576 evq->init_state == SFC_EVQ_STARTING);
577
578 /* Synchronize the DMA memory for reading not required */
579
580 efx_ev_qpoll(evq->common, &evq->read_ptr, evq->callbacks, evq);
581
582 sa = evq->sa;
583 if (unlikely(evq->exception) && sfc_adapter_trylock(sa)) {
584 int rc;
585
586 if (evq->dp_rxq != NULL) {
587 sfc_sw_index_t rxq_sw_index;
588
589 rxq_sw_index = evq->dp_rxq->dpq.queue_id;
590
591 sfc_warn(sa,
592 "restart RxQ %u because of exception on its EvQ %u",
593 rxq_sw_index, evq->evq_index);
594
595 sfc_rx_qstop(sa, rxq_sw_index);
596 rc = sfc_rx_qstart(sa, rxq_sw_index);
597 if (rc != 0)
598 sfc_err(sa, "cannot restart RxQ %u",
599 rxq_sw_index);
600 }
601
602 if (evq->dp_txq != NULL) {
603 sfc_sw_index_t txq_sw_index;
604
605 txq_sw_index = evq->dp_txq->dpq.queue_id;
606
607 sfc_warn(sa,
608 "restart TxQ %u because of exception on its EvQ %u",
609 txq_sw_index, evq->evq_index);
610
611 sfc_tx_qstop(sa, txq_sw_index);
612 rc = sfc_tx_qstart(sa, txq_sw_index);
613 if (rc != 0)
614 sfc_err(sa, "cannot restart TxQ %u",
615 txq_sw_index);
616 }
617
618 if (evq->exception)
619 sfc_panic(sa, "unrecoverable exception on EvQ %u",
620 evq->evq_index);
621
622 sfc_adapter_unlock(sa);
623 }
624
625 /* Poll-mode driver does not re-prime the event queue for interrupts */
626 }
627
628 void
sfc_ev_mgmt_qpoll(struct sfc_adapter * sa)629 sfc_ev_mgmt_qpoll(struct sfc_adapter *sa)
630 {
631 if (rte_spinlock_trylock(&sa->mgmt_evq_lock)) {
632 if (sa->mgmt_evq_running)
633 sfc_ev_qpoll(sa->mgmt_evq);
634
635 rte_spinlock_unlock(&sa->mgmt_evq_lock);
636 }
637 }
638
639 int
sfc_ev_qprime(struct sfc_evq * evq)640 sfc_ev_qprime(struct sfc_evq *evq)
641 {
642 SFC_ASSERT(evq->init_state == SFC_EVQ_STARTED);
643 return efx_ev_qprime(evq->common, evq->read_ptr);
644 }
645
646 /* Event queue HW index allocation scheme is described in sfc_ev.h. */
647 int
sfc_ev_qstart(struct sfc_evq * evq,unsigned int hw_index)648 sfc_ev_qstart(struct sfc_evq *evq, unsigned int hw_index)
649 {
650 struct sfc_adapter *sa = evq->sa;
651 efsys_mem_t *esmp;
652 uint32_t evq_flags = sa->evq_flags;
653 uint32_t irq = 0;
654 unsigned int total_delay_us;
655 unsigned int delay_us;
656 int rc;
657
658 sfc_log_init(sa, "hw_index=%u", hw_index);
659
660 esmp = &evq->mem;
661
662 evq->evq_index = hw_index;
663
664 /* Clear all events */
665 (void)memset((void *)esmp->esm_base, 0xff,
666 efx_evq_size(sa->nic, evq->entries, evq_flags));
667
668 if (sa->intr.lsc_intr && hw_index == sa->mgmt_evq_index) {
669 evq_flags |= EFX_EVQ_FLAGS_NOTIFY_INTERRUPT;
670 irq = 0;
671 } else if (sa->intr.rxq_intr && evq->dp_rxq != NULL) {
672 sfc_ethdev_qid_t ethdev_qid;
673
674 ethdev_qid =
675 sfc_ethdev_rx_qid_by_rxq_sw_index(sfc_sa2shared(sa),
676 evq->dp_rxq->dpq.queue_id);
677 if (ethdev_qid != SFC_ETHDEV_QID_INVALID) {
678 evq_flags |= EFX_EVQ_FLAGS_NOTIFY_INTERRUPT;
679 /*
680 * The first interrupt is used for management EvQ
681 * (LSC etc). RxQ interrupts follow it.
682 */
683 irq = 1 + ethdev_qid;
684 } else {
685 evq_flags |= EFX_EVQ_FLAGS_NOTIFY_DISABLED;
686 }
687 } else {
688 evq_flags |= EFX_EVQ_FLAGS_NOTIFY_DISABLED;
689 }
690
691 evq->init_state = SFC_EVQ_STARTING;
692
693 /* Create the common code event queue */
694 rc = efx_ev_qcreate_irq(sa->nic, hw_index, esmp, evq->entries,
695 0 /* unused on EF10 */, 0, evq_flags,
696 irq, &evq->common);
697 if (rc != 0)
698 goto fail_ev_qcreate;
699
700 SFC_ASSERT(evq->dp_rxq == NULL || evq->dp_txq == NULL);
701 if (evq->dp_rxq != 0) {
702 if (strcmp(sa->priv.dp_rx->dp.name,
703 SFC_KVARG_DATAPATH_EFX) == 0)
704 evq->callbacks = &sfc_ev_callbacks_efx_rx;
705 else
706 evq->callbacks = &sfc_ev_callbacks_dp_rx;
707 } else if (evq->dp_txq != 0) {
708 if (strcmp(sa->priv.dp_tx->dp.name,
709 SFC_KVARG_DATAPATH_EFX) == 0)
710 evq->callbacks = &sfc_ev_callbacks_efx_tx;
711 else
712 evq->callbacks = &sfc_ev_callbacks_dp_tx;
713 } else {
714 evq->callbacks = &sfc_ev_callbacks;
715 }
716
717 /*
718 * Poll once to ensure that eec_initialized callback is invoked in
719 * case if the hardware does not support INIT_DONE events. If the
720 * hardware supports INIT_DONE events, this will do nothing, and the
721 * corresponding event will be processed by sfc_ev_qpoll() below.
722 */
723 efx_ev_qcreate_check_init_done(evq->common, evq->callbacks, evq);
724
725 /* Wait for the initialization event */
726 total_delay_us = 0;
727 delay_us = SFC_EVQ_INIT_BACKOFF_START_US;
728 do {
729 (void)sfc_ev_qpoll(evq);
730
731 /* Check to see if the initialization complete indication
732 * posted by the hardware.
733 */
734 if (evq->init_state == SFC_EVQ_STARTED)
735 goto done;
736
737 /* Give event queue some time to init */
738 rte_delay_us(delay_us);
739
740 total_delay_us += delay_us;
741
742 /* Exponential backoff */
743 delay_us *= 2;
744 if (delay_us > SFC_EVQ_INIT_BACKOFF_MAX_US)
745 delay_us = SFC_EVQ_INIT_BACKOFF_MAX_US;
746
747 } while (total_delay_us < SFC_EVQ_INIT_TIMEOUT_US);
748
749 rc = ETIMEDOUT;
750 goto fail_timedout;
751
752 done:
753 return 0;
754
755 fail_timedout:
756 efx_ev_qdestroy(evq->common);
757
758 fail_ev_qcreate:
759 evq->init_state = SFC_EVQ_INITIALIZED;
760 sfc_log_init(sa, "failed %d", rc);
761 return rc;
762 }
763
764 void
sfc_ev_qstop(struct sfc_evq * evq)765 sfc_ev_qstop(struct sfc_evq *evq)
766 {
767 if (evq == NULL)
768 return;
769
770 sfc_log_init(evq->sa, "hw_index=%u", evq->evq_index);
771
772 if (evq->init_state != SFC_EVQ_STARTED)
773 return;
774
775 evq->init_state = SFC_EVQ_INITIALIZED;
776 evq->callbacks = NULL;
777 evq->read_ptr = 0;
778 evq->exception = B_FALSE;
779
780 efx_ev_qdestroy(evq->common);
781
782 evq->evq_index = 0;
783 }
784
785 static void
sfc_ev_mgmt_periodic_qpoll(void * arg)786 sfc_ev_mgmt_periodic_qpoll(void *arg)
787 {
788 struct sfc_adapter *sa = arg;
789 int rc;
790
791 sfc_ev_mgmt_qpoll(sa);
792
793 rc = rte_eal_alarm_set(SFC_MGMT_EV_QPOLL_PERIOD_US,
794 sfc_ev_mgmt_periodic_qpoll, sa);
795 if (rc == -ENOTSUP) {
796 sfc_warn(sa, "alarms are not supported");
797 sfc_warn(sa, "management EVQ must be polled indirectly using no-wait link status update");
798 } else if (rc != 0) {
799 sfc_err(sa,
800 "cannot rearm management EVQ polling alarm (rc=%d)",
801 rc);
802 }
803 }
804
805 static void
sfc_ev_mgmt_periodic_qpoll_start(struct sfc_adapter * sa)806 sfc_ev_mgmt_periodic_qpoll_start(struct sfc_adapter *sa)
807 {
808 sfc_ev_mgmt_periodic_qpoll(sa);
809 }
810
811 static void
sfc_ev_mgmt_periodic_qpoll_stop(struct sfc_adapter * sa)812 sfc_ev_mgmt_periodic_qpoll_stop(struct sfc_adapter *sa)
813 {
814 rte_eal_alarm_cancel(sfc_ev_mgmt_periodic_qpoll, sa);
815 }
816
817 int
sfc_ev_start(struct sfc_adapter * sa)818 sfc_ev_start(struct sfc_adapter *sa)
819 {
820 int rc;
821
822 sfc_log_init(sa, "entry");
823
824 rc = efx_ev_init(sa->nic);
825 if (rc != 0)
826 goto fail_ev_init;
827
828 /* Start management EVQ used for global events */
829
830 /*
831 * Management event queue start polls the queue, but it cannot
832 * interfere with other polling contexts since mgmt_evq_running
833 * is false yet.
834 */
835 rc = sfc_ev_qstart(sa->mgmt_evq, sa->mgmt_evq_index);
836 if (rc != 0)
837 goto fail_mgmt_evq_start;
838
839 rte_spinlock_lock(&sa->mgmt_evq_lock);
840 sa->mgmt_evq_running = true;
841 rte_spinlock_unlock(&sa->mgmt_evq_lock);
842
843 if (sa->intr.lsc_intr) {
844 rc = sfc_ev_qprime(sa->mgmt_evq);
845 if (rc != 0)
846 goto fail_mgmt_evq_prime;
847 }
848
849 /*
850 * Start management EVQ polling. If interrupts are disabled
851 * (not used), it is required to process link status change
852 * and other device level events to avoid unrecoverable
853 * error because the event queue overflow.
854 */
855 sfc_ev_mgmt_periodic_qpoll_start(sa);
856
857 /*
858 * Rx/Tx event queues are started/stopped when corresponding
859 * Rx/Tx queue is started/stopped.
860 */
861
862 return 0;
863
864 fail_mgmt_evq_prime:
865 sfc_ev_qstop(sa->mgmt_evq);
866
867 fail_mgmt_evq_start:
868 efx_ev_fini(sa->nic);
869
870 fail_ev_init:
871 sfc_log_init(sa, "failed %d", rc);
872 return rc;
873 }
874
875 void
sfc_ev_stop(struct sfc_adapter * sa)876 sfc_ev_stop(struct sfc_adapter *sa)
877 {
878 sfc_log_init(sa, "entry");
879
880 sfc_ev_mgmt_periodic_qpoll_stop(sa);
881
882 rte_spinlock_lock(&sa->mgmt_evq_lock);
883 sa->mgmt_evq_running = false;
884 rte_spinlock_unlock(&sa->mgmt_evq_lock);
885
886 sfc_ev_qstop(sa->mgmt_evq);
887
888 efx_ev_fini(sa->nic);
889 }
890
891 int
sfc_ev_qinit(struct sfc_adapter * sa,enum sfc_evq_type type,unsigned int type_index,unsigned int entries,int socket_id,struct sfc_evq ** evqp)892 sfc_ev_qinit(struct sfc_adapter *sa,
893 enum sfc_evq_type type, unsigned int type_index,
894 unsigned int entries, int socket_id, struct sfc_evq **evqp)
895 {
896 struct sfc_evq *evq;
897 int rc;
898
899 sfc_log_init(sa, "type=%s type_index=%u",
900 sfc_evq_type2str(type), type_index);
901
902 SFC_ASSERT(rte_is_power_of_2(entries));
903
904 rc = ENOMEM;
905 evq = rte_zmalloc_socket("sfc-evq", sizeof(*evq), RTE_CACHE_LINE_SIZE,
906 socket_id);
907 if (evq == NULL)
908 goto fail_evq_alloc;
909
910 evq->sa = sa;
911 evq->type = type;
912 evq->entries = entries;
913
914 /* Allocate DMA space */
915 rc = sfc_dma_alloc(sa, sfc_evq_type2str(type), type_index,
916 EFX_NIC_DMA_ADDR_EVENT_RING,
917 efx_evq_size(sa->nic, evq->entries, sa->evq_flags),
918 socket_id, &evq->mem);
919 if (rc != 0)
920 goto fail_dma_alloc;
921
922 evq->init_state = SFC_EVQ_INITIALIZED;
923
924 sa->evq_count++;
925
926 *evqp = evq;
927
928 return 0;
929
930 fail_dma_alloc:
931 rte_free(evq);
932
933 fail_evq_alloc:
934
935 sfc_log_init(sa, "failed %d", rc);
936 return rc;
937 }
938
939 void
sfc_ev_qfini(struct sfc_evq * evq)940 sfc_ev_qfini(struct sfc_evq *evq)
941 {
942 struct sfc_adapter *sa = evq->sa;
943
944 SFC_ASSERT(evq->init_state == SFC_EVQ_INITIALIZED);
945
946 sfc_dma_free(sa, &evq->mem);
947
948 rte_free(evq);
949
950 SFC_ASSERT(sa->evq_count > 0);
951 sa->evq_count--;
952 }
953
954 static int
sfc_kvarg_perf_profile_handler(__rte_unused const char * key,const char * value_str,void * opaque)955 sfc_kvarg_perf_profile_handler(__rte_unused const char *key,
956 const char *value_str, void *opaque)
957 {
958 uint32_t *value = opaque;
959
960 if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_THROUGHPUT) == 0)
961 *value = EFX_EVQ_FLAGS_TYPE_THROUGHPUT;
962 else if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_LOW_LATENCY) == 0)
963 *value = EFX_EVQ_FLAGS_TYPE_LOW_LATENCY;
964 else if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_AUTO) == 0)
965 *value = EFX_EVQ_FLAGS_TYPE_AUTO;
966 else
967 return -EINVAL;
968
969 return 0;
970 }
971
972 int
sfc_ev_attach(struct sfc_adapter * sa)973 sfc_ev_attach(struct sfc_adapter *sa)
974 {
975 int rc;
976
977 sfc_log_init(sa, "entry");
978
979 sa->evq_flags = EFX_EVQ_FLAGS_TYPE_THROUGHPUT;
980 rc = sfc_kvargs_process(sa, SFC_KVARG_PERF_PROFILE,
981 sfc_kvarg_perf_profile_handler,
982 &sa->evq_flags);
983 if (rc != 0) {
984 sfc_err(sa, "invalid %s parameter value",
985 SFC_KVARG_PERF_PROFILE);
986 goto fail_kvarg_perf_profile;
987 }
988
989 sa->mgmt_evq_index = sfc_mgmt_evq_sw_index(sfc_sa2shared(sa));
990 rte_spinlock_init(&sa->mgmt_evq_lock);
991
992 rc = sfc_ev_qinit(sa, SFC_EVQ_TYPE_MGMT, 0, sa->evq_min_entries,
993 sa->socket_id, &sa->mgmt_evq);
994 if (rc != 0)
995 goto fail_mgmt_evq_init;
996
997 /*
998 * Rx/Tx event queues are created/destroyed when corresponding
999 * Rx/Tx queue is created/destroyed.
1000 */
1001
1002 return 0;
1003
1004 fail_mgmt_evq_init:
1005
1006 fail_kvarg_perf_profile:
1007 sfc_log_init(sa, "failed %d", rc);
1008 return rc;
1009 }
1010
1011 void
sfc_ev_detach(struct sfc_adapter * sa)1012 sfc_ev_detach(struct sfc_adapter *sa)
1013 {
1014 sfc_log_init(sa, "entry");
1015
1016 sfc_ev_qfini(sa->mgmt_evq);
1017
1018 if (sa->evq_count != 0)
1019 sfc_err(sa, "%u EvQs are not destroyed before detach",
1020 sa->evq_count);
1021 }
1022