1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright(c) 2019-2021 Xilinx, Inc.
4 * Copyright(c) 2018-2019 Solarflare Communications Inc.
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
10 /* EF100 native datapath implementation */
14 #include <rte_byteorder.h>
15 #include <rte_mbuf_ptype.h>
19 #include "efx_types.h"
20 #include "efx_regs_ef100.h"
24 #include "sfc_debug.h"
25 #include "sfc_flow_tunnel.h"
26 #include "sfc_tweak.h"
27 #include "sfc_dp_rx.h"
28 #include "sfc_kvargs.h"
29 #include "sfc_ef100.h"
32 #define sfc_ef100_rx_err(_rxq, ...) \
33 SFC_DP_LOG(SFC_KVARG_DATAPATH_EF100, ERR, &(_rxq)->dp.dpq, __VA_ARGS__)
35 #define sfc_ef100_rx_debug(_rxq, ...) \
36 SFC_DP_LOG(SFC_KVARG_DATAPATH_EF100, DEBUG, &(_rxq)->dp.dpq, \
40 * Maximum number of descriptors/buffers in the Rx ring.
41 * It should guarantee that corresponding event queue never overfill.
42 * EF10 native datapath uses event queue of the same size as Rx queue.
43 * Maximum number of events on datapath can be estimated as number of
44 * Rx queue entries (one event per Rx buffer in the worst case) plus
45 * Rx error and flush events.
47 #define SFC_EF100_RXQ_LIMIT(_ndesc) \
48 ((_ndesc) - 1 /* head must not step on tail */ - \
49 1 /* Rx error */ - 1 /* flush */)
51 /** Invalid user mark value when the mark should be treated as unset */
52 #define SFC_EF100_USER_MARK_INVALID 0
54 struct sfc_ef100_rx_sw_desc {
55 struct rte_mbuf *mbuf;
58 struct sfc_ef100_rxq {
59 /* Used on data path */
61 #define SFC_EF100_RXQ_STARTED 0x1
62 #define SFC_EF100_RXQ_NOT_RUNNING 0x2
63 #define SFC_EF100_RXQ_EXCEPTION 0x4
64 #define SFC_EF100_RXQ_RSS_HASH 0x10
65 #define SFC_EF100_RXQ_USER_MARK 0x20
66 #define SFC_EF100_RXQ_FLAG_INTR_EN 0x40
67 #define SFC_EF100_RXQ_INGRESS_MPORT 0x80
68 #define SFC_EF100_RXQ_USER_FLAG 0x100
69 unsigned int ptr_mask;
70 unsigned int evq_phase_bit_shift;
71 unsigned int ready_pkts;
72 unsigned int completed;
73 unsigned int evq_read_ptr;
74 unsigned int evq_read_ptr_primed;
75 volatile efx_qword_t *evq_hw_ring;
76 struct sfc_ef100_rx_sw_desc *sw_ring;
80 uint32_t user_mark_mask;
82 unsigned int evq_hw_index;
83 volatile void *evq_prime;
87 unsigned int max_fill_level;
88 unsigned int refill_threshold;
89 struct rte_mempool *refill_mb_pool;
90 efx_qword_t *rxq_hw_ring;
91 volatile void *doorbell;
93 /* Datapath receive queue anchor */
97 static inline struct sfc_ef100_rxq *
98 sfc_ef100_rxq_by_dp_rxq(struct sfc_dp_rxq *dp_rxq)
100 return container_of(dp_rxq, struct sfc_ef100_rxq, dp);
104 sfc_ef100_rx_qprime(struct sfc_ef100_rxq *rxq)
106 sfc_ef100_evq_prime(rxq->evq_prime, rxq->evq_hw_index,
107 rxq->evq_read_ptr & rxq->ptr_mask);
108 rxq->evq_read_ptr_primed = rxq->evq_read_ptr;
112 sfc_ef100_rx_qpush(struct sfc_ef100_rxq *rxq, unsigned int added)
116 EFX_POPULATE_DWORD_1(dword, ERF_GZ_RX_RING_PIDX, added & rxq->ptr_mask);
118 /* DMA sync to device is not required */
121 * rte_write32() has rte_io_wmb() which guarantees that the STORE
122 * operations (i.e. Rx and event descriptor updates) that precede
123 * the rte_io_wmb() call are visible to NIC before the STORE
124 * operations that follow it (i.e. doorbell write).
126 rte_write32(dword.ed_u32[0], rxq->doorbell);
127 rxq->dp.dpq.rx_dbells++;
129 sfc_ef100_rx_debug(rxq, "RxQ pushed doorbell at pidx %u (added=%u)",
130 EFX_DWORD_FIELD(dword, ERF_GZ_RX_RING_PIDX),
135 sfc_ef100_rx_qrefill(struct sfc_ef100_rxq *rxq)
137 const unsigned int ptr_mask = rxq->ptr_mask;
138 unsigned int free_space;
140 void *objs[SFC_RX_REFILL_BULK];
141 unsigned int added = rxq->added;
143 free_space = rxq->max_fill_level - (added - rxq->completed);
145 if (free_space < rxq->refill_threshold)
148 bulks = free_space / RTE_DIM(objs);
149 /* refill_threshold guarantees that bulks is positive */
150 SFC_ASSERT(bulks > 0);
156 if (unlikely(rte_mempool_get_bulk(rxq->refill_mb_pool, objs,
157 RTE_DIM(objs)) < 0)) {
158 struct rte_eth_dev_data *dev_data =
159 rte_eth_devices[rxq->dp.dpq.port_id].data;
162 * It is hardly a safe way to increment counter
163 * from different contexts, but all PMDs do it.
165 dev_data->rx_mbuf_alloc_failed += RTE_DIM(objs);
166 /* Return if we have posted nothing yet */
167 if (added == rxq->added)
173 for (i = 0, id = added & ptr_mask;
176 struct rte_mbuf *m = objs[i];
177 struct sfc_ef100_rx_sw_desc *rxd;
178 rte_iova_t phys_addr;
180 __rte_mbuf_raw_sanity_check(m);
182 SFC_ASSERT((id & ~ptr_mask) == 0);
183 rxd = &rxq->sw_ring[id];
187 * Avoid writing to mbuf. It is cheaper to do it
188 * when we receive packet and fill in nearby
192 phys_addr = rte_mbuf_data_iova_default(m);
193 EFX_POPULATE_QWORD_1(rxq->rxq_hw_ring[id],
194 ESF_GZ_RX_BUF_ADDR, phys_addr);
197 added += RTE_DIM(objs);
198 } while (--bulks > 0);
200 SFC_ASSERT(rxq->added != added);
202 sfc_ef100_rx_qpush(rxq, added);
205 static inline uint64_t
206 sfc_ef100_rx_nt_or_inner_l4_csum(const efx_word_t class)
208 return EFX_WORD_FIELD(class,
209 ESF_GZ_RX_PREFIX_HCLASS_NT_OR_INNER_L4_CSUM) ==
210 ESE_GZ_RH_HCLASS_L4_CSUM_GOOD ?
211 RTE_MBUF_F_RX_L4_CKSUM_GOOD : RTE_MBUF_F_RX_L4_CKSUM_BAD;
214 static inline uint64_t
215 sfc_ef100_rx_tun_outer_l4_csum(const efx_word_t class)
217 return EFX_WORD_FIELD(class,
218 ESF_GZ_RX_PREFIX_HCLASS_TUN_OUTER_L4_CSUM) ==
219 ESE_GZ_RH_HCLASS_L4_CSUM_GOOD ?
220 RTE_MBUF_F_RX_OUTER_L4_CKSUM_GOOD : RTE_MBUF_F_RX_OUTER_L4_CKSUM_BAD;
224 sfc_ef100_rx_class_decode(const efx_word_t class, uint64_t *ol_flags)
227 bool no_tunnel = false;
229 if (unlikely(EFX_WORD_FIELD(class, ESF_GZ_RX_PREFIX_HCLASS_L2_CLASS) !=
230 ESE_GZ_RH_HCLASS_L2_CLASS_E2_0123VLAN))
233 switch (EFX_WORD_FIELD(class, ESF_GZ_RX_PREFIX_HCLASS_L2_N_VLAN)) {
235 ptype = RTE_PTYPE_L2_ETHER;
238 ptype = RTE_PTYPE_L2_ETHER_VLAN;
241 ptype = RTE_PTYPE_L2_ETHER_QINQ;
245 switch (EFX_WORD_FIELD(class, ESF_GZ_RX_PREFIX_HCLASS_TUNNEL_CLASS)) {
246 case ESE_GZ_RH_HCLASS_TUNNEL_CLASS_NONE:
249 case ESE_GZ_RH_HCLASS_TUNNEL_CLASS_VXLAN:
250 ptype |= RTE_PTYPE_TUNNEL_VXLAN | RTE_PTYPE_L4_UDP;
251 *ol_flags |= sfc_ef100_rx_tun_outer_l4_csum(class);
253 case ESE_GZ_RH_HCLASS_TUNNEL_CLASS_NVGRE:
254 ptype |= RTE_PTYPE_TUNNEL_NVGRE;
256 case ESE_GZ_RH_HCLASS_TUNNEL_CLASS_GENEVE:
257 ptype |= RTE_PTYPE_TUNNEL_GENEVE | RTE_PTYPE_L4_UDP;
258 *ol_flags |= sfc_ef100_rx_tun_outer_l4_csum(class);
262 * Driver does not know the tunnel, but it is
263 * still a tunnel and NT_OR_INNER refer to inner
270 bool l4_valid = true;
272 switch (EFX_WORD_FIELD(class,
273 ESF_GZ_RX_PREFIX_HCLASS_NT_OR_INNER_L3_CLASS)) {
274 case ESE_GZ_RH_HCLASS_L3_CLASS_IP4GOOD:
275 ptype |= RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
276 *ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD;
278 case ESE_GZ_RH_HCLASS_L3_CLASS_IP4BAD:
279 ptype |= RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
280 *ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_BAD;
282 case ESE_GZ_RH_HCLASS_L3_CLASS_IP6:
283 ptype |= RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;
290 switch (EFX_WORD_FIELD(class,
291 ESF_GZ_RX_PREFIX_HCLASS_NT_OR_INNER_L4_CLASS)) {
292 case ESE_GZ_RH_HCLASS_L4_CLASS_TCP:
293 ptype |= RTE_PTYPE_L4_TCP;
295 sfc_ef100_rx_nt_or_inner_l4_csum(class);
297 case ESE_GZ_RH_HCLASS_L4_CLASS_UDP:
298 ptype |= RTE_PTYPE_L4_UDP;
300 sfc_ef100_rx_nt_or_inner_l4_csum(class);
302 case ESE_GZ_RH_HCLASS_L4_CLASS_FRAG:
303 ptype |= RTE_PTYPE_L4_FRAG;
308 bool l4_valid = true;
310 switch (EFX_WORD_FIELD(class,
311 ESF_GZ_RX_PREFIX_HCLASS_TUN_OUTER_L3_CLASS)) {
312 case ESE_GZ_RH_HCLASS_L3_CLASS_IP4GOOD:
313 ptype |= RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
315 case ESE_GZ_RH_HCLASS_L3_CLASS_IP4BAD:
316 ptype |= RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
317 *ol_flags |= RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD;
319 case ESE_GZ_RH_HCLASS_L3_CLASS_IP6:
320 ptype |= RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;
324 switch (EFX_WORD_FIELD(class,
325 ESF_GZ_RX_PREFIX_HCLASS_NT_OR_INNER_L3_CLASS)) {
326 case ESE_GZ_RH_HCLASS_L3_CLASS_IP4GOOD:
327 ptype |= RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN;
328 *ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD;
330 case ESE_GZ_RH_HCLASS_L3_CLASS_IP4BAD:
331 ptype |= RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN;
332 *ol_flags |= RTE_MBUF_F_RX_IP_CKSUM_BAD;
334 case ESE_GZ_RH_HCLASS_L3_CLASS_IP6:
335 ptype |= RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN;
343 switch (EFX_WORD_FIELD(class,
344 ESF_GZ_RX_PREFIX_HCLASS_NT_OR_INNER_L4_CLASS)) {
345 case ESE_GZ_RH_HCLASS_L4_CLASS_TCP:
346 ptype |= RTE_PTYPE_INNER_L4_TCP;
348 sfc_ef100_rx_nt_or_inner_l4_csum(class);
350 case ESE_GZ_RH_HCLASS_L4_CLASS_UDP:
351 ptype |= RTE_PTYPE_INNER_L4_UDP;
353 sfc_ef100_rx_nt_or_inner_l4_csum(class);
355 case ESE_GZ_RH_HCLASS_L4_CLASS_FRAG:
356 ptype |= RTE_PTYPE_INNER_L4_FRAG;
366 * Below function relies on the following fields in Rx prefix.
367 * Some fields are mandatory, some fields are optional.
368 * See sfc_ef100_rx_qstart() below.
370 static const efx_rx_prefix_layout_t sfc_ef100_rx_prefix_layout = {
372 #define SFC_EF100_RX_PREFIX_FIELD(_name, _big_endian) \
373 EFX_RX_PREFIX_FIELD(_name, ESF_GZ_RX_PREFIX_ ## _name, _big_endian)
375 SFC_EF100_RX_PREFIX_FIELD(LENGTH, B_FALSE),
376 SFC_EF100_RX_PREFIX_FIELD(RSS_HASH_VALID, B_FALSE),
377 SFC_EF100_RX_PREFIX_FIELD(CLASS, B_FALSE),
378 EFX_RX_PREFIX_FIELD(INGRESS_MPORT,
379 ESF_GZ_RX_PREFIX_INGRESS_MPORT, B_FALSE),
380 SFC_EF100_RX_PREFIX_FIELD(RSS_HASH, B_FALSE),
381 SFC_EF100_RX_PREFIX_FIELD(USER_FLAG, B_FALSE),
382 SFC_EF100_RX_PREFIX_FIELD(USER_MARK, B_FALSE),
384 #undef SFC_EF100_RX_PREFIX_FIELD
389 sfc_ef100_rx_prefix_to_offloads(const struct sfc_ef100_rxq *rxq,
390 const efx_xword_t *rx_prefix,
393 const efx_word_t *class;
394 uint64_t ol_flags = 0;
396 RTE_BUILD_BUG_ON(EFX_LOW_BIT(ESF_GZ_RX_PREFIX_CLASS) % CHAR_BIT != 0);
397 RTE_BUILD_BUG_ON(EFX_WIDTH(ESF_GZ_RX_PREFIX_CLASS) % CHAR_BIT != 0);
398 RTE_BUILD_BUG_ON(EFX_WIDTH(ESF_GZ_RX_PREFIX_CLASS) / CHAR_BIT !=
400 class = (const efx_word_t *)((const uint8_t *)rx_prefix +
401 EFX_LOW_BIT(ESF_GZ_RX_PREFIX_CLASS) / CHAR_BIT);
402 if (unlikely(EFX_WORD_FIELD(*class,
403 ESF_GZ_RX_PREFIX_HCLASS_L2_STATUS) !=
404 ESE_GZ_RH_HCLASS_L2_STATUS_OK))
407 m->packet_type = sfc_ef100_rx_class_decode(*class, &ol_flags);
409 if ((rxq->flags & SFC_EF100_RXQ_RSS_HASH) &&
410 EFX_TEST_XWORD_BIT(rx_prefix[0],
411 ESF_GZ_RX_PREFIX_RSS_HASH_VALID_LBN)) {
412 ol_flags |= RTE_MBUF_F_RX_RSS_HASH;
413 /* EFX_XWORD_FIELD converts little-endian to CPU */
414 m->hash.rss = EFX_XWORD_FIELD(rx_prefix[0],
415 ESF_GZ_RX_PREFIX_RSS_HASH);
418 if (rxq->flags & SFC_EF100_RXQ_USER_FLAG) {
421 user_flag = EFX_XWORD_FIELD(rx_prefix[0],
422 ESF_GZ_RX_PREFIX_USER_FLAG);
424 ol_flags |= RTE_MBUF_F_RX_FDIR;
427 if (rxq->flags & SFC_EF100_RXQ_USER_MARK) {
432 /* EFX_XWORD_FIELD converts little-endian to CPU */
433 mark = EFX_XWORD_FIELD(rx_prefix[0],
434 ESF_GZ_RX_PREFIX_USER_MARK);
436 user_mark = mark & rxq->user_mark_mask;
437 if (user_mark != SFC_EF100_USER_MARK_INVALID) {
438 ol_flags |= RTE_MBUF_F_RX_FDIR | RTE_MBUF_F_RX_FDIR_ID;
439 m->hash.fdir.hi = user_mark;
442 tunnel_mark = SFC_FT_GET_TUNNEL_MARK(mark);
443 if (tunnel_mark != SFC_FT_TUNNEL_MARK_INVALID) {
446 ft_id = SFC_FT_TUNNEL_MARK_TO_ID(tunnel_mark);
448 ol_flags |= sfc_dp_ft_id_valid;
449 *RTE_MBUF_DYNFIELD(m, sfc_dp_ft_id_offset,
450 sfc_ft_id_t *) = ft_id;
454 if (rxq->flags & SFC_EF100_RXQ_INGRESS_MPORT) {
455 ol_flags |= sfc_dp_mport_override;
456 *RTE_MBUF_DYNFIELD(m,
458 typeof(&((efx_mport_id_t *)0)->id)) =
459 EFX_XWORD_FIELD(rx_prefix[0],
460 ESF_GZ_RX_PREFIX_INGRESS_MPORT);
463 m->ol_flags = ol_flags;
467 static const uint8_t *
468 sfc_ef100_rx_pkt_prefix(const struct rte_mbuf *m)
470 return (const uint8_t *)m->buf_addr + RTE_PKTMBUF_HEADROOM;
473 static struct rte_mbuf *
474 sfc_ef100_rx_next_mbuf(struct sfc_ef100_rxq *rxq)
479 /* mbuf associated with current Rx descriptor */
480 m = rxq->sw_ring[rxq->completed++ & rxq->ptr_mask].mbuf;
482 /* completed is already moved to the next one */
483 if (unlikely(rxq->completed == rxq->added))
487 * Prefetch Rx prefix of the next packet.
488 * Current packet is scattered and the next mbuf is its fragment
489 * it simply prefetches some data - no harm since packet rate
490 * should not be high if scatter is used.
492 id = rxq->completed & rxq->ptr_mask;
493 rte_prefetch0(sfc_ef100_rx_pkt_prefix(rxq->sw_ring[id].mbuf));
495 if (unlikely(rxq->completed + 1 == rxq->added))
499 * Prefetch mbuf control structure of the next after next Rx
502 id = (id == rxq->ptr_mask) ? 0 : (id + 1);
503 rte_mbuf_prefetch_part1(rxq->sw_ring[id].mbuf);
506 * If the next time we'll need SW Rx descriptor from the next
507 * cache line, try to make sure that we have it in cache.
509 if ((id & 0x7) == 0x7)
510 rte_prefetch0(&rxq->sw_ring[(id + 1) & rxq->ptr_mask]);
516 static struct rte_mbuf **
517 sfc_ef100_rx_process_ready_pkts(struct sfc_ef100_rxq *rxq,
518 struct rte_mbuf **rx_pkts,
519 struct rte_mbuf ** const rx_pkts_end)
521 while (rxq->ready_pkts > 0 && rx_pkts != rx_pkts_end) {
522 struct rte_mbuf *pkt;
523 struct rte_mbuf *lastseg;
524 const efx_xword_t *rx_prefix;
531 pkt = sfc_ef100_rx_next_mbuf(rxq);
532 __rte_mbuf_raw_sanity_check(pkt);
534 RTE_BUILD_BUG_ON(sizeof(pkt->rearm_data[0]) !=
535 sizeof(rxq->rearm_data));
536 pkt->rearm_data[0] = rxq->rearm_data;
538 /* data_off already moved past Rx prefix */
539 rx_prefix = (const efx_xword_t *)sfc_ef100_rx_pkt_prefix(pkt);
541 pkt_len = EFX_XWORD_FIELD(rx_prefix[0],
542 ESF_GZ_RX_PREFIX_LENGTH);
543 SFC_ASSERT(pkt_len > 0);
544 rte_pktmbuf_pkt_len(pkt) = pkt_len;
546 seg_len = RTE_MIN(pkt_len, rxq->buf_size - rxq->prefix_size);
547 rte_pktmbuf_data_len(pkt) = seg_len;
549 deliver = sfc_ef100_rx_prefix_to_offloads(rxq, rx_prefix, pkt);
552 while ((pkt_len -= seg_len) > 0) {
553 struct rte_mbuf *seg;
555 seg = sfc_ef100_rx_next_mbuf(rxq);
556 __rte_mbuf_raw_sanity_check(seg);
558 seg->data_off = RTE_PKTMBUF_HEADROOM;
560 seg_len = RTE_MIN(pkt_len, rxq->buf_size);
561 rte_pktmbuf_data_len(seg) = seg_len;
562 rte_pktmbuf_pkt_len(seg) = seg_len;
569 if (likely(deliver)) {
571 sfc_pkts_bytes_add(&rxq->dp.dpq.stats, 1,
572 rte_pktmbuf_pkt_len(pkt));
574 rte_pktmbuf_free(pkt);
582 sfc_ef100_rx_get_event(struct sfc_ef100_rxq *rxq, efx_qword_t *ev)
584 *ev = rxq->evq_hw_ring[rxq->evq_read_ptr & rxq->ptr_mask];
586 if (!sfc_ef100_ev_present(ev,
587 (rxq->evq_read_ptr >> rxq->evq_phase_bit_shift) & 1))
590 if (unlikely(!sfc_ef100_ev_type_is(ev, ESE_GZ_EF100_EV_RX_PKTS))) {
592 * Do not move read_ptr to keep the event for exception
593 * handling by the control path.
595 rxq->flags |= SFC_EF100_RXQ_EXCEPTION;
596 sfc_ef100_rx_err(rxq,
597 "RxQ exception at EvQ ptr %u(%#x), event %08x:%08x",
598 rxq->evq_read_ptr, rxq->evq_read_ptr & rxq->ptr_mask,
599 EFX_QWORD_FIELD(*ev, EFX_DWORD_1),
600 EFX_QWORD_FIELD(*ev, EFX_DWORD_0));
604 sfc_ef100_rx_debug(rxq, "RxQ got event %08x:%08x at %u (%#x)",
605 EFX_QWORD_FIELD(*ev, EFX_DWORD_1),
606 EFX_QWORD_FIELD(*ev, EFX_DWORD_0),
608 rxq->evq_read_ptr & rxq->ptr_mask);
615 sfc_ef100_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
617 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(rx_queue);
618 struct rte_mbuf ** const rx_pkts_end = &rx_pkts[nb_pkts];
621 rx_pkts = sfc_ef100_rx_process_ready_pkts(rxq, rx_pkts, rx_pkts_end);
623 if (unlikely(rxq->flags &
624 (SFC_EF100_RXQ_NOT_RUNNING | SFC_EF100_RXQ_EXCEPTION)))
627 while (rx_pkts != rx_pkts_end && sfc_ef100_rx_get_event(rxq, &rx_ev)) {
629 EFX_QWORD_FIELD(rx_ev, ESF_GZ_EV_RXPKTS_NUM_PKT);
630 rx_pkts = sfc_ef100_rx_process_ready_pkts(rxq, rx_pkts,
634 /* It is not a problem if we refill in the case of exception */
635 sfc_ef100_rx_qrefill(rxq);
637 if ((rxq->flags & SFC_EF100_RXQ_FLAG_INTR_EN) &&
638 rxq->evq_read_ptr_primed != rxq->evq_read_ptr)
639 sfc_ef100_rx_qprime(rxq);
642 return nb_pkts - (rx_pkts_end - rx_pkts);
645 static const uint32_t *
646 sfc_ef100_supported_ptypes_get(__rte_unused uint32_t tunnel_encaps)
648 static const uint32_t ef100_native_ptypes[] = {
650 RTE_PTYPE_L2_ETHER_VLAN,
651 RTE_PTYPE_L2_ETHER_QINQ,
652 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
653 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
657 RTE_PTYPE_TUNNEL_VXLAN,
658 RTE_PTYPE_TUNNEL_NVGRE,
659 RTE_PTYPE_TUNNEL_GENEVE,
660 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
661 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
662 RTE_PTYPE_INNER_L4_TCP,
663 RTE_PTYPE_INNER_L4_UDP,
664 RTE_PTYPE_INNER_L4_FRAG,
668 return ef100_native_ptypes;
671 static sfc_dp_rx_qdesc_npending_t sfc_ef100_rx_qdesc_npending;
673 sfc_ef100_rx_qdesc_npending(__rte_unused struct sfc_dp_rxq *dp_rxq)
678 static sfc_dp_rx_qdesc_status_t sfc_ef100_rx_qdesc_status;
680 sfc_ef100_rx_qdesc_status(__rte_unused struct sfc_dp_rxq *dp_rxq,
681 __rte_unused uint16_t offset)
687 static sfc_dp_rx_get_dev_info_t sfc_ef100_rx_get_dev_info;
689 sfc_ef100_rx_get_dev_info(struct rte_eth_dev_info *dev_info)
692 * Number of descriptors just defines maximum number of pushed
693 * descriptors (fill level).
695 dev_info->rx_desc_lim.nb_min = SFC_RX_REFILL_BULK;
696 dev_info->rx_desc_lim.nb_align = SFC_RX_REFILL_BULK;
700 static sfc_dp_rx_qsize_up_rings_t sfc_ef100_rx_qsize_up_rings;
702 sfc_ef100_rx_qsize_up_rings(uint16_t nb_rx_desc,
703 struct sfc_dp_rx_hw_limits *limits,
704 __rte_unused struct rte_mempool *mb_pool,
705 unsigned int *rxq_entries,
706 unsigned int *evq_entries,
707 unsigned int *rxq_max_fill_level)
710 * rte_ethdev API guarantees that the number meets min, max and
711 * alignment requirements.
713 if (nb_rx_desc <= limits->rxq_min_entries)
714 *rxq_entries = limits->rxq_min_entries;
716 *rxq_entries = rte_align32pow2(nb_rx_desc);
718 *evq_entries = *rxq_entries;
720 *rxq_max_fill_level = RTE_MIN(nb_rx_desc,
721 SFC_EF100_RXQ_LIMIT(*evq_entries));
727 sfc_ef100_mk_mbuf_rearm_data(uint16_t port_id, uint16_t prefix_size)
731 memset(&m, 0, sizeof(m));
733 rte_mbuf_refcnt_set(&m, 1);
734 m.data_off = RTE_PKTMBUF_HEADROOM + prefix_size;
738 /* rearm_data covers structure members filled in above */
739 rte_compiler_barrier();
740 RTE_BUILD_BUG_ON(sizeof(m.rearm_data[0]) != sizeof(uint64_t));
741 return m.rearm_data[0];
744 static sfc_dp_rx_qcreate_t sfc_ef100_rx_qcreate;
746 sfc_ef100_rx_qcreate(uint16_t port_id, uint16_t queue_id,
747 const struct rte_pci_addr *pci_addr, int socket_id,
748 const struct sfc_dp_rx_qcreate_info *info,
749 struct sfc_dp_rxq **dp_rxqp)
751 struct sfc_ef100_rxq *rxq;
755 if (info->rxq_entries != info->evq_entries)
759 rxq = rte_zmalloc_socket("sfc-ef100-rxq", sizeof(*rxq),
760 RTE_CACHE_LINE_SIZE, socket_id);
764 sfc_dp_queue_init(&rxq->dp.dpq, port_id, queue_id, pci_addr);
767 rxq->sw_ring = rte_calloc_socket("sfc-ef100-rxq-sw_ring",
769 sizeof(*rxq->sw_ring),
770 RTE_CACHE_LINE_SIZE, socket_id);
771 if (rxq->sw_ring == NULL)
772 goto fail_desc_alloc;
774 rxq->flags |= SFC_EF100_RXQ_NOT_RUNNING;
775 rxq->ptr_mask = info->rxq_entries - 1;
776 rxq->evq_phase_bit_shift = rte_bsf32(info->evq_entries);
777 rxq->evq_hw_ring = info->evq_hw_ring;
778 rxq->max_fill_level = info->max_fill_level;
779 rxq->refill_threshold = info->refill_threshold;
780 rxq->prefix_size = info->prefix_size;
782 SFC_ASSERT(info->user_mark_mask != 0);
783 rxq->user_mark_mask = info->user_mark_mask;
785 rxq->buf_size = info->buf_size;
786 rxq->refill_mb_pool = info->refill_mb_pool;
787 rxq->rxq_hw_ring = info->rxq_hw_ring;
788 rxq->doorbell = (volatile uint8_t *)info->mem_bar +
789 ER_GZ_RX_RING_DOORBELL_OFST +
790 (info->hw_index << info->vi_window_shift);
792 rxq->evq_hw_index = info->evq_hw_index;
793 rxq->evq_prime = (volatile uint8_t *)info->mem_bar +
795 ER_GZ_EVQ_INT_PRIME_OFST;
797 sfc_ef100_rx_debug(rxq, "RxQ doorbell is %p", rxq->doorbell);
810 static sfc_dp_rx_qdestroy_t sfc_ef100_rx_qdestroy;
812 sfc_ef100_rx_qdestroy(struct sfc_dp_rxq *dp_rxq)
814 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
816 rte_free(rxq->sw_ring);
820 static sfc_dp_rx_qstart_t sfc_ef100_rx_qstart;
822 sfc_ef100_rx_qstart(struct sfc_dp_rxq *dp_rxq, unsigned int evq_read_ptr,
823 const efx_rx_prefix_layout_t *pinfo)
825 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
826 uint32_t unsup_rx_prefix_fields;
828 SFC_ASSERT(rxq->completed == 0);
829 SFC_ASSERT(rxq->added == 0);
831 /* Prefix must fit into reserved Rx buffer space */
832 if (pinfo->erpl_length > rxq->prefix_size)
835 unsup_rx_prefix_fields =
836 efx_rx_prefix_layout_check(pinfo, &sfc_ef100_rx_prefix_layout);
838 /* LENGTH and CLASS filds must always be present */
839 if ((unsup_rx_prefix_fields &
840 ((1U << EFX_RX_PREFIX_FIELD_LENGTH) |
841 (1U << EFX_RX_PREFIX_FIELD_CLASS))) != 0)
844 if ((unsup_rx_prefix_fields &
845 ((1U << EFX_RX_PREFIX_FIELD_RSS_HASH_VALID) |
846 (1U << EFX_RX_PREFIX_FIELD_RSS_HASH))) == 0)
847 rxq->flags |= SFC_EF100_RXQ_RSS_HASH;
849 rxq->flags &= ~SFC_EF100_RXQ_RSS_HASH;
851 if ((unsup_rx_prefix_fields &
852 (1U << EFX_RX_PREFIX_FIELD_USER_FLAG)) == 0)
853 rxq->flags |= SFC_EF100_RXQ_USER_FLAG;
855 rxq->flags &= ~SFC_EF100_RXQ_USER_FLAG;
857 if ((unsup_rx_prefix_fields &
858 (1U << EFX_RX_PREFIX_FIELD_USER_MARK)) == 0)
859 rxq->flags |= SFC_EF100_RXQ_USER_MARK;
861 rxq->flags &= ~SFC_EF100_RXQ_USER_MARK;
863 if ((unsup_rx_prefix_fields &
864 (1U << EFX_RX_PREFIX_FIELD_INGRESS_MPORT)) == 0)
865 rxq->flags |= SFC_EF100_RXQ_INGRESS_MPORT;
867 rxq->flags &= ~SFC_EF100_RXQ_INGRESS_MPORT;
869 rxq->prefix_size = pinfo->erpl_length;
870 rxq->rearm_data = sfc_ef100_mk_mbuf_rearm_data(rxq->dp.dpq.port_id,
873 sfc_ef100_rx_qrefill(rxq);
875 rxq->evq_read_ptr = evq_read_ptr;
877 rxq->flags |= SFC_EF100_RXQ_STARTED;
878 rxq->flags &= ~(SFC_EF100_RXQ_NOT_RUNNING | SFC_EF100_RXQ_EXCEPTION);
880 if (rxq->flags & SFC_EF100_RXQ_FLAG_INTR_EN)
881 sfc_ef100_rx_qprime(rxq);
886 static sfc_dp_rx_qstop_t sfc_ef100_rx_qstop;
888 sfc_ef100_rx_qstop(struct sfc_dp_rxq *dp_rxq, unsigned int *evq_read_ptr)
890 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
892 rxq->flags |= SFC_EF100_RXQ_NOT_RUNNING;
894 *evq_read_ptr = rxq->evq_read_ptr;
897 static sfc_dp_rx_qrx_ev_t sfc_ef100_rx_qrx_ev;
899 sfc_ef100_rx_qrx_ev(struct sfc_dp_rxq *dp_rxq, __rte_unused unsigned int id)
901 __rte_unused struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
903 SFC_ASSERT(rxq->flags & SFC_EF100_RXQ_NOT_RUNNING);
906 * It is safe to ignore Rx event since we free all mbufs on
907 * queue purge anyway.
913 static sfc_dp_rx_qpurge_t sfc_ef100_rx_qpurge;
915 sfc_ef100_rx_qpurge(struct sfc_dp_rxq *dp_rxq)
917 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
919 struct sfc_ef100_rx_sw_desc *rxd;
921 for (i = rxq->completed; i != rxq->added; ++i) {
922 rxd = &rxq->sw_ring[i & rxq->ptr_mask];
923 rte_mbuf_raw_free(rxd->mbuf);
927 rxq->completed = rxq->added = 0;
930 rxq->flags &= ~SFC_EF100_RXQ_STARTED;
933 static sfc_dp_rx_intr_enable_t sfc_ef100_rx_intr_enable;
935 sfc_ef100_rx_intr_enable(struct sfc_dp_rxq *dp_rxq)
937 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
939 rxq->flags |= SFC_EF100_RXQ_FLAG_INTR_EN;
940 if (rxq->flags & SFC_EF100_RXQ_STARTED)
941 sfc_ef100_rx_qprime(rxq);
945 static sfc_dp_rx_intr_disable_t sfc_ef100_rx_intr_disable;
947 sfc_ef100_rx_intr_disable(struct sfc_dp_rxq *dp_rxq)
949 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
951 /* Cannot disarm, just disable rearm */
952 rxq->flags &= ~SFC_EF100_RXQ_FLAG_INTR_EN;
956 static sfc_dp_rx_get_pushed_t sfc_ef100_rx_get_pushed;
958 sfc_ef100_rx_get_pushed(struct sfc_dp_rxq *dp_rxq)
960 struct sfc_ef100_rxq *rxq = sfc_ef100_rxq_by_dp_rxq(dp_rxq);
963 * The datapath keeps track only of added descriptors, since
964 * the number of pushed descriptors always equals the number
965 * of added descriptors due to enforced alignment.
970 struct sfc_dp_rx sfc_ef100_rx = {
972 .name = SFC_KVARG_DATAPATH_EF100,
974 .hw_fw_caps = SFC_DP_HW_FW_CAP_EF100,
976 .features = SFC_DP_RX_FEAT_MULTI_PROCESS |
977 SFC_DP_RX_FEAT_FLOW_FLAG |
978 SFC_DP_RX_FEAT_FLOW_MARK |
979 SFC_DP_RX_FEAT_INTR |
980 SFC_DP_RX_FEAT_STATS,
981 .dev_offload_capa = 0,
982 .queue_offload_capa = RTE_ETH_RX_OFFLOAD_CHECKSUM |
983 RTE_ETH_RX_OFFLOAD_OUTER_IPV4_CKSUM |
984 RTE_ETH_RX_OFFLOAD_OUTER_UDP_CKSUM |
985 RTE_ETH_RX_OFFLOAD_SCATTER |
986 RTE_ETH_RX_OFFLOAD_RSS_HASH,
987 .get_dev_info = sfc_ef100_rx_get_dev_info,
988 .qsize_up_rings = sfc_ef100_rx_qsize_up_rings,
989 .qcreate = sfc_ef100_rx_qcreate,
990 .qdestroy = sfc_ef100_rx_qdestroy,
991 .qstart = sfc_ef100_rx_qstart,
992 .qstop = sfc_ef100_rx_qstop,
993 .qrx_ev = sfc_ef100_rx_qrx_ev,
994 .qpurge = sfc_ef100_rx_qpurge,
995 .supported_ptypes_get = sfc_ef100_supported_ptypes_get,
996 .qdesc_npending = sfc_ef100_rx_qdesc_npending,
997 .qdesc_status = sfc_ef100_rx_qdesc_status,
998 .intr_enable = sfc_ef100_rx_intr_enable,
999 .intr_disable = sfc_ef100_rx_intr_disable,
1000 .get_pushed = sfc_ef100_rx_get_pushed,
1001 .pkt_burst = sfc_ef100_recv_pkts,