From 7092be8437bd4ca7079d37decb19d852f2c9686c Mon Sep 17 00:00:00 2001 From: "Chen Jing D(Mark)" Date: Fri, 30 Oct 2015 16:02:57 +0800 Subject: [PATCH] fm10k: add vector Rx This patch add below functions: 1. Add function fm10k_rxq_rearm to re-allocate mbuf for used desc in RX HW ring. 2. Add 2 functions, in which using SSE instructions to parse RX desc to get pkt_type and ol_flags in mbuf. 3. Add func fm10k_recv_raw_pkts_vec to parse raw packets, in which includes possible chained packets. 4. Add func fm10k_recv_pkts_vec to receive single mbuf packet. Signed-off-by: Chen Jing D(Mark) Acked-by: Cunming Liang --- drivers/net/fm10k/fm10k.h | 12 + drivers/net/fm10k/fm10k_ethdev.c | 3 + drivers/net/fm10k/fm10k_rxtx_vec.c | 426 +++++++++++++++++++++++++++++ 3 files changed, 441 insertions(+) diff --git a/drivers/net/fm10k/fm10k.h b/drivers/net/fm10k/fm10k.h index 48b2f6d152..b929ed084c 100644 --- a/drivers/net/fm10k/fm10k.h +++ b/drivers/net/fm10k/fm10k.h @@ -123,6 +123,12 @@ #define FM10K_VFTA_BIT(vlan_id) (1 << ((vlan_id) & 0x1F)) #define FM10K_VFTA_IDX(vlan_id) ((vlan_id) >> 5) +#define RTE_FM10K_RXQ_REARM_THRESH 32 +#define RTE_FM10K_VPMD_TX_BURST 32 +#define RTE_FM10K_MAX_RX_BURST RTE_FM10K_RXQ_REARM_THRESH +#define RTE_FM10K_TX_MAX_FREE_BUF_SZ 64 +#define RTE_FM10K_DESCS_PER_LOOP 4 + struct fm10k_macvlan_filter_info { uint16_t vlan_num; /* Total VLAN number */ uint16_t mac_num; /* Total mac number */ @@ -174,6 +180,8 @@ struct fm10k_rx_queue { struct rte_mbuf *pkt_last_seg; /* Last segment of current packet. */ uint64_t hw_ring_phys_addr; uint64_t mbuf_initializer; /* value to init mbufs */ + /** need to alloc dummy mbuf, for wraparound when scanning hw ring */ + struct rte_mbuf fake_mbuf; uint16_t next_dd; uint16_t next_alloc; uint16_t next_trigger; @@ -181,6 +189,9 @@ struct fm10k_rx_queue { volatile uint32_t *tail_ptr; uint16_t nb_desc; uint16_t queue_id; + /* Below 2 fields only valid in case vPMD is applied. */ + uint16_t rxrearm_nb; /* number of remaining to be re-armed */ + uint16_t rxrearm_start; /* the idx we start the re-arming from */ uint8_t port_id; uint8_t drop_en; uint8_t rx_deferred_start; /* don't start this queue in dev start. */ @@ -321,4 +332,5 @@ uint16_t fm10k_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts); int fm10k_rxq_vec_setup(struct fm10k_rx_queue *rxq); +uint16_t fm10k_recv_pkts_vec(void *, struct rte_mbuf **, uint16_t); #endif diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c index 3ca48b0c3b..7fcebed8ce 100644 --- a/drivers/net/fm10k/fm10k_ethdev.c +++ b/drivers/net/fm10k/fm10k_ethdev.c @@ -121,6 +121,9 @@ rx_queue_reset(struct fm10k_rx_queue *q) q->next_alloc = 0; q->next_trigger = q->alloc_thresh - 1; FM10K_PCI_REG_WRITE(q->tail_ptr, q->nb_desc - 1); + q->rxrearm_start = 0; + q->rxrearm_nb = 0; + return 0; } diff --git a/drivers/net/fm10k/fm10k_rxtx_vec.c b/drivers/net/fm10k/fm10k_rxtx_vec.c index 34b677b708..9633f35eba 100644 --- a/drivers/net/fm10k/fm10k_rxtx_vec.c +++ b/drivers/net/fm10k/fm10k_rxtx_vec.c @@ -44,6 +44,133 @@ #pragma GCC diagnostic ignored "-Wcast-qual" #endif +/* Handling the offload flags (olflags) field takes computation + * time when receiving packets. Therefore we provide a flag to disable + * the processing of the olflags field when they are not needed. This + * gives improved performance, at the cost of losing the offload info + * in the received packet + */ +#ifdef RTE_LIBRTE_FM10K_RX_OLFLAGS_ENABLE + +/* Vlan present flag shift */ +#define VP_SHIFT (2) +/* L3 type shift */ +#define L3TYPE_SHIFT (4) +/* L4 type shift */ +#define L4TYPE_SHIFT (7) + +static inline void +fm10k_desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts) +{ + __m128i ptype0, ptype1, vtag0, vtag1; + union { + uint16_t e[4]; + uint64_t dword; + } vol; + + const __m128i pkttype_msk = _mm_set_epi16( + 0x0000, 0x0000, 0x0000, 0x0000, + PKT_RX_VLAN_PKT, PKT_RX_VLAN_PKT, + PKT_RX_VLAN_PKT, PKT_RX_VLAN_PKT); + + /* mask everything except rss type */ + const __m128i rsstype_msk = _mm_set_epi16( + 0x0000, 0x0000, 0x0000, 0x0000, + 0x000F, 0x000F, 0x000F, 0x000F); + + /* map rss type to rss hash flag */ + const __m128i rss_flags = _mm_set_epi8(0, 0, 0, 0, + 0, 0, 0, PKT_RX_RSS_HASH, + PKT_RX_RSS_HASH, 0, PKT_RX_RSS_HASH, 0, + PKT_RX_RSS_HASH, PKT_RX_RSS_HASH, PKT_RX_RSS_HASH, 0); + + ptype0 = _mm_unpacklo_epi16(descs[0], descs[1]); + ptype1 = _mm_unpacklo_epi16(descs[2], descs[3]); + vtag0 = _mm_unpackhi_epi16(descs[0], descs[1]); + vtag1 = _mm_unpackhi_epi16(descs[2], descs[3]); + + ptype0 = _mm_unpacklo_epi32(ptype0, ptype1); + ptype0 = _mm_and_si128(ptype0, rsstype_msk); + ptype0 = _mm_shuffle_epi8(rss_flags, ptype0); + + vtag1 = _mm_unpacklo_epi32(vtag0, vtag1); + vtag1 = _mm_srli_epi16(vtag1, VP_SHIFT); + vtag1 = _mm_and_si128(vtag1, pkttype_msk); + + vtag1 = _mm_or_si128(ptype0, vtag1); + vol.dword = _mm_cvtsi128_si64(vtag1); + + rx_pkts[0]->ol_flags = vol.e[0]; + rx_pkts[1]->ol_flags = vol.e[1]; + rx_pkts[2]->ol_flags = vol.e[2]; + rx_pkts[3]->ol_flags = vol.e[3]; +} + +static inline void +fm10k_desc_to_pktype_v(__m128i descs[4], struct rte_mbuf **rx_pkts) +{ + __m128i l3l4type0, l3l4type1, l3type, l4type; + union { + uint16_t e[4]; + uint64_t dword; + } vol; + + /* L3 pkt type mask Bit4 to Bit6 */ + const __m128i l3type_msk = _mm_set_epi16( + 0x0000, 0x0000, 0x0000, 0x0000, + 0x0070, 0x0070, 0x0070, 0x0070); + + /* L4 pkt type mask Bit7 to Bit9 */ + const __m128i l4type_msk = _mm_set_epi16( + 0x0000, 0x0000, 0x0000, 0x0000, + 0x0380, 0x0380, 0x0380, 0x0380); + + /* convert RRC l3 type to mbuf format */ + const __m128i l3type_flags = _mm_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, RTE_PTYPE_L3_IPV6_EXT, + RTE_PTYPE_L3_IPV6, RTE_PTYPE_L3_IPV4_EXT, + RTE_PTYPE_L3_IPV4, 0); + + /* Convert RRC l4 type to mbuf format l4type_flags shift-left 8 bits + * to fill into8 bits length. + */ + const __m128i l4type_flags = _mm_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0, + RTE_PTYPE_TUNNEL_GENEVE >> 8, + RTE_PTYPE_TUNNEL_NVGRE >> 8, + RTE_PTYPE_TUNNEL_VXLAN >> 8, + RTE_PTYPE_TUNNEL_GRE >> 8, + RTE_PTYPE_L4_UDP >> 8, + RTE_PTYPE_L4_TCP >> 8, + 0); + + l3l4type0 = _mm_unpacklo_epi16(descs[0], descs[1]); + l3l4type1 = _mm_unpacklo_epi16(descs[2], descs[3]); + l3l4type0 = _mm_unpacklo_epi32(l3l4type0, l3l4type1); + + l3type = _mm_and_si128(l3l4type0, l3type_msk); + l4type = _mm_and_si128(l3l4type0, l4type_msk); + + l3type = _mm_srli_epi16(l3type, L3TYPE_SHIFT); + l4type = _mm_srli_epi16(l4type, L4TYPE_SHIFT); + + l3type = _mm_shuffle_epi8(l3type_flags, l3type); + /* l4type_flags shift-left for 8 bits, need shift-right back */ + l4type = _mm_shuffle_epi8(l4type_flags, l4type); + + l4type = _mm_slli_epi16(l4type, 8); + l3l4type0 = _mm_or_si128(l3type, l4type); + vol.dword = _mm_cvtsi128_si64(l3l4type0); + + rx_pkts[0]->packet_type = vol.e[0]; + rx_pkts[1]->packet_type = vol.e[1]; + rx_pkts[2]->packet_type = vol.e[2]; + rx_pkts[3]->packet_type = vol.e[3]; +} +#else +#define fm10k_desc_to_olflags_v(desc, rx_pkts) do {} while (0) +#define fm10k_desc_to_pktype_v(desc, rx_pkts) do {} while (0) +#endif + int __attribute__((cold)) fm10k_rxq_vec_setup(struct fm10k_rx_queue *rxq) { @@ -64,3 +191,302 @@ fm10k_rxq_vec_setup(struct fm10k_rx_queue *rxq) rxq->mbuf_initializer = *(uint64_t *)p; return 0; } + +static inline void +fm10k_rxq_rearm(struct fm10k_rx_queue *rxq) +{ + int i; + uint16_t rx_id; + volatile union fm10k_rx_desc *rxdp; + struct rte_mbuf **mb_alloc = &rxq->sw_ring[rxq->rxrearm_start]; + struct rte_mbuf *mb0, *mb1; + __m128i head_off = _mm_set_epi64x( + RTE_PKTMBUF_HEADROOM + FM10K_RX_DATABUF_ALIGN - 1, + RTE_PKTMBUF_HEADROOM + FM10K_RX_DATABUF_ALIGN - 1); + __m128i dma_addr0, dma_addr1; + /* Rx buffer need to be aligned with 512 byte */ + const __m128i hba_msk = _mm_set_epi64x(0, + UINT64_MAX - FM10K_RX_DATABUF_ALIGN + 1); + + rxdp = rxq->hw_ring + rxq->rxrearm_start; + + /* Pull 'n' more MBUFs into the software ring */ + if (rte_mempool_get_bulk(rxq->mp, + (void *)mb_alloc, + RTE_FM10K_RXQ_REARM_THRESH) < 0) { + dma_addr0 = _mm_setzero_si128(); + /* Clean up all the HW/SW ring content */ + for (i = 0; i < RTE_FM10K_RXQ_REARM_THRESH; i++) { + mb_alloc[i] = &rxq->fake_mbuf; + _mm_store_si128((__m128i *)&rxdp[i].q, + dma_addr0); + } + + rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed += + RTE_FM10K_RXQ_REARM_THRESH; + return; + } + + /* Initialize the mbufs in vector, process 2 mbufs in one loop */ + for (i = 0; i < RTE_FM10K_RXQ_REARM_THRESH; i += 2, mb_alloc += 2) { + __m128i vaddr0, vaddr1; + uintptr_t p0, p1; + + mb0 = mb_alloc[0]; + mb1 = mb_alloc[1]; + + /* Flush mbuf with pkt template. + * Data to be rearmed is 6 bytes long. + * Though, RX will overwrite ol_flags that are coming next + * anyway. So overwrite whole 8 bytes with one load: + * 6 bytes of rearm_data plus first 2 bytes of ol_flags. + */ + p0 = (uintptr_t)&mb0->rearm_data; + *(uint64_t *)p0 = rxq->mbuf_initializer; + p1 = (uintptr_t)&mb1->rearm_data; + *(uint64_t *)p1 = rxq->mbuf_initializer; + + /* load buf_addr(lo 64bit) and buf_physaddr(hi 64bit) */ + vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr); + vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr); + + /* convert pa to dma_addr hdr/data */ + dma_addr0 = _mm_unpackhi_epi64(vaddr0, vaddr0); + dma_addr1 = _mm_unpackhi_epi64(vaddr1, vaddr1); + + /* add headroom to pa values */ + dma_addr0 = _mm_add_epi64(dma_addr0, head_off); + dma_addr1 = _mm_add_epi64(dma_addr1, head_off); + + /* Do 512 byte alignment to satisfy HW requirement, in the + * meanwhile, set Header Buffer Address to zero. + */ + dma_addr0 = _mm_and_si128(dma_addr0, hba_msk); + dma_addr1 = _mm_and_si128(dma_addr1, hba_msk); + + /* flush desc with pa dma_addr */ + _mm_store_si128((__m128i *)&rxdp++->q, dma_addr0); + _mm_store_si128((__m128i *)&rxdp++->q, dma_addr1); + + /* enforce 512B alignment on default Rx virtual addresses */ + mb0->data_off = (uint16_t)(RTE_PTR_ALIGN((char *)mb0->buf_addr + + RTE_PKTMBUF_HEADROOM, FM10K_RX_DATABUF_ALIGN) + - (char *)mb0->buf_addr); + mb1->data_off = (uint16_t)(RTE_PTR_ALIGN((char *)mb1->buf_addr + + RTE_PKTMBUF_HEADROOM, FM10K_RX_DATABUF_ALIGN) + - (char *)mb1->buf_addr); + } + + rxq->rxrearm_start += RTE_FM10K_RXQ_REARM_THRESH; + if (rxq->rxrearm_start >= rxq->nb_desc) + rxq->rxrearm_start = 0; + + rxq->rxrearm_nb -= RTE_FM10K_RXQ_REARM_THRESH; + + rx_id = (uint16_t)((rxq->rxrearm_start == 0) ? + (rxq->nb_desc - 1) : (rxq->rxrearm_start - 1)); + + /* Update the tail pointer on the NIC */ + FM10K_PCI_REG_WRITE(rxq->tail_ptr, rx_id); +} + +static inline uint16_t +fm10k_recv_raw_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts, uint8_t *split_packet) +{ + volatile union fm10k_rx_desc *rxdp; + struct rte_mbuf **mbufp; + uint16_t nb_pkts_recd; + int pos; + struct fm10k_rx_queue *rxq = rx_queue; + uint64_t var; + __m128i shuf_msk; + __m128i dd_check, eop_check; + uint16_t next_dd; + + next_dd = rxq->next_dd; + + /* Just the act of getting into the function from the application is + * going to cost about 7 cycles + */ + rxdp = rxq->hw_ring + next_dd; + + _mm_prefetch((const void *)rxdp, _MM_HINT_T0); + + /* See if we need to rearm the RX queue - gives the prefetch a bit + * of time to act + */ + if (rxq->rxrearm_nb > RTE_FM10K_RXQ_REARM_THRESH) + fm10k_rxq_rearm(rxq); + + /* Before we start moving massive data around, check to see if + * there is actually a packet available + */ + if (!(rxdp->d.staterr & FM10K_RXD_STATUS_DD)) + return 0; + + /* Vecotr RX will process 4 packets at a time, strip the unaligned + * tails in case it's not multiple of 4. + */ + nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_FM10K_DESCS_PER_LOOP); + + /* 4 packets DD mask */ + dd_check = _mm_set_epi64x(0x0000000100000001LL, 0x0000000100000001LL); + + /* 4 packets EOP mask */ + eop_check = _mm_set_epi64x(0x0000000200000002LL, 0x0000000200000002LL); + + /* mask to shuffle from desc. to mbuf */ + shuf_msk = _mm_set_epi8( + 7, 6, 5, 4, /* octet 4~7, 32bits rss */ + 15, 14, /* octet 14~15, low 16 bits vlan_macip */ + 13, 12, /* octet 12~13, 16 bits data_len */ + 0xFF, 0xFF, /* skip high 16 bits pkt_len, zero out */ + 13, 12, /* octet 12~13, low 16 bits pkt_len */ + 0xFF, 0xFF, /* skip high 16 bits pkt_type */ + 0xFF, 0xFF /* Skip pkt_type field in shuffle operation */ + ); + + /* Cache is empty -> need to scan the buffer rings, but first move + * the next 'n' mbufs into the cache + */ + mbufp = &rxq->sw_ring[next_dd]; + + /* A. load 4 packet in one loop + * [A*. mask out 4 unused dirty field in desc] + * B. copy 4 mbuf point from swring to rx_pkts + * C. calc the number of DD bits among the 4 packets + * [C*. extract the end-of-packet bit, if requested] + * D. fill info. from desc to mbuf + */ + for (pos = 0, nb_pkts_recd = 0; pos < nb_pkts; + pos += RTE_FM10K_DESCS_PER_LOOP, + rxdp += RTE_FM10K_DESCS_PER_LOOP) { + __m128i descs0[RTE_FM10K_DESCS_PER_LOOP]; + __m128i pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4; + __m128i zero, staterr, sterr_tmp1, sterr_tmp2; + __m128i mbp1, mbp2; /* two mbuf pointer in one XMM reg. */ + + /* B.1 load 1 mbuf point */ + mbp1 = _mm_loadu_si128((__m128i *)&mbufp[pos]); + + /* Read desc statuses backwards to avoid race condition */ + /* A.1 load 4 pkts desc */ + descs0[3] = _mm_loadu_si128((__m128i *)(rxdp + 3)); + + /* B.2 copy 2 mbuf point into rx_pkts */ + _mm_storeu_si128((__m128i *)&rx_pkts[pos], mbp1); + + /* B.1 load 1 mbuf point */ + mbp2 = _mm_loadu_si128((__m128i *)&mbufp[pos+2]); + + descs0[2] = _mm_loadu_si128((__m128i *)(rxdp + 2)); + /* B.1 load 2 mbuf point */ + descs0[1] = _mm_loadu_si128((__m128i *)(rxdp + 1)); + descs0[0] = _mm_loadu_si128((__m128i *)(rxdp)); + + /* B.2 copy 2 mbuf point into rx_pkts */ + _mm_storeu_si128((__m128i *)&rx_pkts[pos+2], mbp2); + + /* avoid compiler reorder optimization */ + rte_compiler_barrier(); + + if (split_packet) { + rte_prefetch0(&rx_pkts[pos]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 1]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 2]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 3]->cacheline1); + } + + /* D.1 pkt 3,4 convert format from desc to pktmbuf */ + pkt_mb4 = _mm_shuffle_epi8(descs0[3], shuf_msk); + pkt_mb3 = _mm_shuffle_epi8(descs0[2], shuf_msk); + + /* C.1 4=>2 filter staterr info only */ + sterr_tmp2 = _mm_unpackhi_epi32(descs0[3], descs0[2]); + /* C.1 4=>2 filter staterr info only */ + sterr_tmp1 = _mm_unpackhi_epi32(descs0[1], descs0[0]); + + /* set ol_flags with vlan packet type */ + fm10k_desc_to_olflags_v(descs0, &rx_pkts[pos]); + + /* D.1 pkt 1,2 convert format from desc to pktmbuf */ + pkt_mb2 = _mm_shuffle_epi8(descs0[1], shuf_msk); + pkt_mb1 = _mm_shuffle_epi8(descs0[0], shuf_msk); + + /* C.2 get 4 pkts staterr value */ + zero = _mm_xor_si128(dd_check, dd_check); + staterr = _mm_unpacklo_epi32(sterr_tmp1, sterr_tmp2); + + /* D.3 copy final 3,4 data to rx_pkts */ + _mm_storeu_si128((void *)&rx_pkts[pos+3]->rx_descriptor_fields1, + pkt_mb4); + _mm_storeu_si128((void *)&rx_pkts[pos+2]->rx_descriptor_fields1, + pkt_mb3); + + /* C* extract and record EOP bit */ + if (split_packet) { + __m128i eop_shuf_mask = _mm_set_epi8( + 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, + 0x04, 0x0C, 0x00, 0x08 + ); + + /* and with mask to extract bits, flipping 1-0 */ + __m128i eop_bits = _mm_andnot_si128(staterr, eop_check); + /* the staterr values are not in order, as the count + * count of dd bits doesn't care. However, for end of + * packet tracking, we do care, so shuffle. This also + * compresses the 32-bit values to 8-bit + */ + eop_bits = _mm_shuffle_epi8(eop_bits, eop_shuf_mask); + /* store the resulting 32-bit value */ + *(int *)split_packet = _mm_cvtsi128_si32(eop_bits); + split_packet += RTE_FM10K_DESCS_PER_LOOP; + + /* zero-out next pointers */ + rx_pkts[pos]->next = NULL; + rx_pkts[pos + 1]->next = NULL; + rx_pkts[pos + 2]->next = NULL; + rx_pkts[pos + 3]->next = NULL; + } + + /* C.3 calc available number of desc */ + staterr = _mm_and_si128(staterr, dd_check); + staterr = _mm_packs_epi32(staterr, zero); + + /* D.3 copy final 1,2 data to rx_pkts */ + _mm_storeu_si128((void *)&rx_pkts[pos+1]->rx_descriptor_fields1, + pkt_mb2); + _mm_storeu_si128((void *)&rx_pkts[pos]->rx_descriptor_fields1, + pkt_mb1); + + fm10k_desc_to_pktype_v(descs0, &rx_pkts[pos]); + + /* C.4 calc avaialbe number of desc */ + var = __builtin_popcountll(_mm_cvtsi128_si64(staterr)); + nb_pkts_recd += var; + if (likely(var != RTE_FM10K_DESCS_PER_LOOP)) + break; + } + + /* Update our internal tail pointer */ + rxq->next_dd = (uint16_t)(rxq->next_dd + nb_pkts_recd); + rxq->next_dd = (uint16_t)(rxq->next_dd & (rxq->nb_desc - 1)); + rxq->rxrearm_nb = (uint16_t)(rxq->rxrearm_nb + nb_pkts_recd); + + return nb_pkts_recd; +} + +/* vPMD receive routine + * + * Notice: + * - don't support ol_flags for rss and csum err + */ +uint16_t +fm10k_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + return fm10k_recv_raw_pkts_vec(rx_queue, rx_pkts, nb_pkts, NULL); +} -- 2.20.1