From f742a9a6681330e975dac59aa2a5e419ecdf040e Mon Sep 17 00:00:00 2001 From: Jerin Jacob Date: Wed, 23 Jun 2021 10:16:25 +0530 Subject: [PATCH] net/cnxk: add Rx burst for CN10K Add Rx burst support for CN10K SoC. Signed-off-by: Jerin Jacob Signed-off-by: Nithin Dabilpuram Signed-off-by: Pavan Nikhilesh Signed-off-by: Harman Kalra --- drivers/net/cnxk/cn10k_ethdev.h | 3 + drivers/net/cnxk/cn10k_rx.c | 45 ++++++ drivers/net/cnxk/cn10k_rx.h | 236 ++++++++++++++++++++++++++++++++ drivers/net/cnxk/meson.build | 1 + 4 files changed, 285 insertions(+) create mode 100644 drivers/net/cnxk/cn10k_rx.c diff --git a/drivers/net/cnxk/cn10k_ethdev.h b/drivers/net/cnxk/cn10k_ethdev.h index 18deb95ee4..596985f38d 100644 --- a/drivers/net/cnxk/cn10k_ethdev.h +++ b/drivers/net/cnxk/cn10k_ethdev.h @@ -33,4 +33,7 @@ struct cn10k_eth_rxq { uint16_t rq; } __plt_cache_aligned; +/* Rx and Tx routines */ +void cn10k_eth_set_rx_function(struct rte_eth_dev *eth_dev); + #endif /* __CN10K_ETHDEV_H__ */ diff --git a/drivers/net/cnxk/cn10k_rx.c b/drivers/net/cnxk/cn10k_rx.c new file mode 100644 index 0000000000..8b422d0644 --- /dev/null +++ b/drivers/net/cnxk/cn10k_rx.c @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(C) 2021 Marvell. + */ + +#include "cn10k_ethdev.h" +#include "cn10k_rx.h" + +#define R(name, f3, f2, f1, f0, flags) \ + uint16_t __rte_noinline __rte_hot cn10k_nix_recv_pkts_##name( \ + void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts) \ + { \ + return cn10k_nix_recv_pkts(rx_queue, rx_pkts, pkts, (flags)); \ + } + +NIX_RX_FASTPATH_MODES +#undef R + +static inline void +pick_rx_func(struct rte_eth_dev *eth_dev, + const eth_rx_burst_t rx_burst[2][2][2][2]) +{ + struct cnxk_eth_dev *dev = cnxk_eth_pmd_priv(eth_dev); + + /* [MARK] [CKSUM] [PTYPE] [RSS] */ + eth_dev->rx_pkt_burst = rx_burst + [!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_MARK_UPDATE_F)] + [!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_CHECKSUM_F)] + [!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_PTYPE_F)] + [!!(dev->rx_offload_flags & NIX_RX_OFFLOAD_RSS_F)]; +} + +void +cn10k_eth_set_rx_function(struct rte_eth_dev *eth_dev) +{ + const eth_rx_burst_t nix_eth_rx_burst[2][2][2][2] = { +#define R(name, f3, f2, f1, f0, flags) \ + [f3][f2][f1][f0] = cn10k_nix_recv_pkts_##name, + + NIX_RX_FASTPATH_MODES +#undef R + }; + + pick_rx_func(eth_dev, nix_eth_rx_burst); + rte_mb(); +} diff --git a/drivers/net/cnxk/cn10k_rx.h b/drivers/net/cnxk/cn10k_rx.h index d3d1661f01..01c9d291a3 100644 --- a/drivers/net/cnxk/cn10k_rx.h +++ b/drivers/net/cnxk/cn10k_rx.h @@ -6,6 +6,242 @@ #include +#define NIX_RX_OFFLOAD_NONE (0) +#define NIX_RX_OFFLOAD_RSS_F BIT(0) #define NIX_RX_OFFLOAD_PTYPE_F BIT(1) +#define NIX_RX_OFFLOAD_CHECKSUM_F BIT(2) +#define NIX_RX_OFFLOAD_MARK_UPDATE_F BIT(3) + +/* Flags to control cqe_to_mbuf conversion function. + * Defining it from backwards to denote its been + * not used as offload flags to pick function + */ +#define NIX_RX_MULTI_SEG_F BIT(15) + +#define CNXK_NIX_CQ_ENTRY_SZ 128 +#define NIX_DESCS_PER_LOOP 4 +#define CQE_CAST(x) ((struct nix_cqe_hdr_s *)(x)) +#define CQE_SZ(x) ((x) * CNXK_NIX_CQ_ENTRY_SZ) + +union mbuf_initializer { + struct { + uint16_t data_off; + uint16_t refcnt; + uint16_t nb_segs; + uint16_t port; + } fields; + uint64_t value; +}; + +static __rte_always_inline uint64_t +nix_clear_data_off(uint64_t oldval) +{ + union mbuf_initializer mbuf_init = {.value = oldval}; + + mbuf_init.fields.data_off = 0; + return mbuf_init.value; +} + +static __rte_always_inline struct rte_mbuf * +nix_get_mbuf_from_cqe(void *cq, const uint64_t data_off) +{ + rte_iova_t buff; + + /* Skip CQE, NIX_RX_PARSE_S and SG HDR(9 DWORDs) and peek buff addr */ + buff = *((rte_iova_t *)((uint64_t *)cq + 9)); + return (struct rte_mbuf *)(buff - data_off); +} + +static __rte_always_inline uint32_t +nix_ptype_get(const void *const lookup_mem, const uint64_t in) +{ + const uint16_t *const ptype = lookup_mem; + const uint16_t lh_lg_lf = (in & 0xFFF0000000000000) >> 52; + const uint16_t tu_l2 = ptype[(in & 0x000FFFF000000000) >> 36]; + const uint16_t il4_tu = ptype[PTYPE_NON_TUNNEL_ARRAY_SZ + lh_lg_lf]; + + return (il4_tu << PTYPE_NON_TUNNEL_WIDTH) | tu_l2; +} + +static __rte_always_inline uint32_t +nix_rx_olflags_get(const void *const lookup_mem, const uint64_t in) +{ + const uint32_t *const ol_flags = + (const uint32_t *)((const uint8_t *)lookup_mem + + PTYPE_ARRAY_SZ); + + return ol_flags[(in & 0xfff00000) >> 20]; +} + +static inline uint64_t +nix_update_match_id(const uint16_t match_id, uint64_t ol_flags, + struct rte_mbuf *mbuf) +{ + /* There is no separate bit to check match_id + * is valid or not? and no flag to identify it is an + * RTE_FLOW_ACTION_TYPE_FLAG vs RTE_FLOW_ACTION_TYPE_MARK + * action. The former case addressed through 0 being invalid + * value and inc/dec match_id pair when MARK is activated. + * The later case addressed through defining + * CNXK_FLOW_MARK_DEFAULT as value for + * RTE_FLOW_ACTION_TYPE_MARK. + * This would translate to not use + * CNXK_FLOW_ACTION_FLAG_DEFAULT - 1 and + * CNXK_FLOW_ACTION_FLAG_DEFAULT for match_id. + * i.e valid mark_id's are from + * 0 to CNXK_FLOW_ACTION_FLAG_DEFAULT - 2 + */ + if (likely(match_id)) { + ol_flags |= PKT_RX_FDIR; + if (match_id != CNXK_FLOW_ACTION_FLAG_DEFAULT) { + ol_flags |= PKT_RX_FDIR_ID; + mbuf->hash.fdir.hi = match_id - 1; + } + } + + return ol_flags; +} + +static __rte_always_inline void +cn10k_nix_cqe_to_mbuf(const struct nix_cqe_hdr_s *cq, const uint32_t tag, + struct rte_mbuf *mbuf, const void *lookup_mem, + const uint64_t val, const uint16_t flag) +{ + const union nix_rx_parse_u *rx = + (const union nix_rx_parse_u *)((const uint64_t *)cq + 1); + const uint16_t len = rx->pkt_lenm1 + 1; + const uint64_t w1 = *(const uint64_t *)rx; + uint64_t ol_flags = 0; + + /* Mark mempool obj as "get" as it is alloc'ed by NIX */ + __mempool_check_cookies(mbuf->pool, (void **)&mbuf, 1, 1); + + if (flag & NIX_RX_OFFLOAD_PTYPE_F) + mbuf->packet_type = nix_ptype_get(lookup_mem, w1); + else + mbuf->packet_type = 0; + + if (flag & NIX_RX_OFFLOAD_RSS_F) { + mbuf->hash.rss = tag; + ol_flags |= PKT_RX_RSS_HASH; + } + + if (flag & NIX_RX_OFFLOAD_CHECKSUM_F) + ol_flags |= nix_rx_olflags_get(lookup_mem, w1); + + if (flag & NIX_RX_OFFLOAD_MARK_UPDATE_F) + ol_flags = nix_update_match_id(rx->match_id, ol_flags, mbuf); + + mbuf->ol_flags = ol_flags; + *(uint64_t *)(&mbuf->rearm_data) = val; + mbuf->pkt_len = len; + + mbuf->data_len = len; + mbuf->next = NULL; +} + +static inline uint16_t +nix_rx_nb_pkts(struct cn10k_eth_rxq *rxq, const uint64_t wdata, + const uint16_t pkts, const uint32_t qmask) +{ + uint32_t available = rxq->available; + + /* Update the available count if cached value is not enough */ + if (unlikely(available < pkts)) { + uint64_t reg, head, tail; + + /* Use LDADDA version to avoid reorder */ + reg = roc_atomic64_add_sync(wdata, rxq->cq_status); + /* CQ_OP_STATUS operation error */ + if (reg & BIT_ULL(NIX_CQ_OP_STAT_OP_ERR) || + reg & BIT_ULL(NIX_CQ_OP_STAT_CQ_ERR)) + return 0; + + tail = reg & 0xFFFFF; + head = (reg >> 20) & 0xFFFFF; + if (tail < head) + available = tail - head + qmask + 1; + else + available = tail - head; + + rxq->available = available; + } + + return RTE_MIN(pkts, available); +} + +static __rte_always_inline uint16_t +cn10k_nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts, + const uint16_t flags) +{ + struct cn10k_eth_rxq *rxq = rx_queue; + const uint64_t mbuf_init = rxq->mbuf_initializer; + const void *lookup_mem = rxq->lookup_mem; + const uint64_t data_off = rxq->data_off; + const uintptr_t desc = rxq->desc; + const uint64_t wdata = rxq->wdata; + const uint32_t qmask = rxq->qmask; + uint16_t packets = 0, nb_pkts; + uint32_t head = rxq->head; + struct nix_cqe_hdr_s *cq; + struct rte_mbuf *mbuf; + + nb_pkts = nix_rx_nb_pkts(rxq, wdata, pkts, qmask); + + while (packets < nb_pkts) { + /* Prefetch N desc ahead */ + rte_prefetch_non_temporal( + (void *)(desc + (CQE_SZ((head + 2) & qmask)))); + cq = (struct nix_cqe_hdr_s *)(desc + CQE_SZ(head)); + + mbuf = nix_get_mbuf_from_cqe(cq, data_off); + + cn10k_nix_cqe_to_mbuf(cq, cq->tag, mbuf, lookup_mem, mbuf_init, + flags); + rx_pkts[packets++] = mbuf; + roc_prefetch_store_keep(mbuf); + head++; + head &= qmask; + } + + rxq->head = head; + rxq->available -= nb_pkts; + + /* Free all the CQs that we've processed */ + plt_write64((wdata | nb_pkts), rxq->cq_door); + + return nb_pkts; +} + +#define RSS_F NIX_RX_OFFLOAD_RSS_F +#define PTYPE_F NIX_RX_OFFLOAD_PTYPE_F +#define CKSUM_F NIX_RX_OFFLOAD_CHECKSUM_F +#define MARK_F NIX_RX_OFFLOAD_MARK_UPDATE_F + +/* [MARK] [CKSUM] [PTYPE] [RSS] */ +#define NIX_RX_FASTPATH_MODES \ +R(no_offload, 0, 0, 0, 0, NIX_RX_OFFLOAD_NONE) \ +R(rss, 0, 0, 0, 1, RSS_F) \ +R(ptype, 0, 0, 1, 0, PTYPE_F) \ +R(ptype_rss, 0, 0, 1, 1, PTYPE_F | RSS_F) \ +R(cksum, 0, 1, 0, 0, CKSUM_F) \ +R(cksum_rss, 0, 1, 0, 1, CKSUM_F | RSS_F) \ +R(cksum_ptype, 0, 1, 1, 0, CKSUM_F | PTYPE_F) \ +R(cksum_ptype_rss, 0, 1, 1, 1, CKSUM_F | PTYPE_F | RSS_F) \ +R(mark, 1, 0, 0, 0, MARK_F) \ +R(mark_rss, 1, 0, 0, 1, MARK_F | RSS_F) \ +R(mark_ptype, 1, 0, 1, 0, MARK_F | PTYPE_F) \ +R(mark_ptype_rss, 1, 0, 1, 1, MARK_F | PTYPE_F | RSS_F) \ +R(mark_cksum, 1, 1, 0, 0, MARK_F | CKSUM_F) \ +R(mark_cksum_rss, 1, 1, 0, 1, MARK_F | CKSUM_F | RSS_F) \ +R(mark_cksum_ptype, 1, 1, 1, 0, MARK_F | CKSUM_F | PTYPE_F)\ +R(mark_cksum_ptype_rss, 1, 1, 1, 1, MARK_F | CKSUM_F | PTYPE_F | RSS_F) + +#define R(name, f3, f2, f1, f0, flags) \ + uint16_t __rte_noinline __rte_hot cn10k_nix_recv_pkts_##name( \ + void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts); + +NIX_RX_FASTPATH_MODES +#undef R #endif /* __CN10K_RX_H__ */ diff --git a/drivers/net/cnxk/meson.build b/drivers/net/cnxk/meson.build index f6b95cd2f5..c831e764c8 100644 --- a/drivers/net/cnxk/meson.build +++ b/drivers/net/cnxk/meson.build @@ -29,6 +29,7 @@ sources += files( # CN10K sources += files( 'cn10k_ethdev.c', + 'cn10k_rx.c', ) deps += ['bus_pci', 'cryptodev', 'eventdev', 'security'] -- 2.20.1