Author: hselasky Date: Mon Dec 7 12:38:51 2015 New Revision: 291938 URL: https://svnweb.freebsd.org/changeset/base/291938
Log: Add full support for Receive Side Scaling, RSS, to the mlx5en driver. This includes binding all interrupt and worker threads according to the RSS configuration, setting up correct Toeplitz hashing keys as given by RSS and setting the correct mbuf hashtype for all received traffic. MFC after: 1 week Sponsored by: Mellanox Technologies Differential Revision: https://reviews.freebsd.org/D4410 Modified: head/sys/dev/mlx5/mlx5_core/mlx5_eq.c head/sys/dev/mlx5/mlx5_en/en.h head/sys/dev/mlx5/mlx5_en/mlx5_en_main.c head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c head/sys/modules/mlx5/Makefile head/sys/modules/mlx5en/Makefile Modified: head/sys/dev/mlx5/mlx5_core/mlx5_eq.c ============================================================================== --- head/sys/dev/mlx5/mlx5_core/mlx5_eq.c Mon Dec 7 12:20:26 2015 (r291937) +++ head/sys/dev/mlx5/mlx5_core/mlx5_eq.c Mon Dec 7 12:38:51 2015 (r291938) @@ -31,6 +31,13 @@ #include <dev/mlx5/mlx5_ifc.h> #include "mlx5_core.h" +#include "opt_rss.h" + +#ifdef RSS +#include <net/rss_config.h> +#include <netinet/in_rss.h> +#endif + enum { MLX5_EQE_SIZE = sizeof(struct mlx5_eqe), MLX5_EQE_OWNER_INIT_VAL = 0x1, @@ -389,6 +396,18 @@ int mlx5_create_map_eq(struct mlx5_core_ priv->irq_info[vecidx].name, eq); if (err) goto err_eq; +#ifdef RSS + if (vecidx >= MLX5_EQ_VEC_COMP_BASE) { + u8 bucket = vecidx - MLX5_EQ_VEC_COMP_BASE; + err = bind_irq_to_cpu(priv->msix_arr[vecidx].vector, + rss_getcpu(bucket % rss_getnumbuckets())); + if (err) + goto err_irq; + } +#else + if (0) + goto err_irq; +#endif /* EQs are created in ARMED state @@ -398,6 +417,8 @@ int mlx5_create_map_eq(struct mlx5_core_ kvfree(in); return 0; +err_irq: + free_irq(priv->msix_arr[vecidx].vector, eq); err_eq: mlx5_cmd_destroy_eq(dev, eq->eqn); Modified: head/sys/dev/mlx5/mlx5_en/en.h ============================================================================== --- head/sys/dev/mlx5/mlx5_en/en.h Mon Dec 7 12:20:26 2015 (r291937) +++ head/sys/dev/mlx5/mlx5_en/en.h Mon Dec 7 12:38:51 2015 (r291938) @@ -50,6 +50,13 @@ #include <net/ethernet.h> #include <sys/buf_ring.h> +#include "opt_rss.h" + +#ifdef RSS +#include <net/rss_config.h> +#include <netinet/in_rss.h> +#endif + #include <machine/bus.h> #ifdef HAVE_TURBO_LRO Modified: head/sys/dev/mlx5/mlx5_en/mlx5_en_main.c ============================================================================== --- head/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Dec 7 12:20:26 2015 (r291937) +++ head/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Dec 7 12:38:51 2015 (r291938) @@ -931,6 +931,10 @@ mlx5e_create_sq(struct mlx5e_channel *c, void *sqc = param->sqc; void *sqc_wq = MLX5_ADDR_OF(sqc, sqc, wq); +#ifdef RSS + cpuset_t cpu_mask; + int cpu_id; +#endif int err; /* Create DMA descriptor TAG */ @@ -991,9 +995,15 @@ mlx5e_create_sq(struct mlx5e_channel *c, } TASK_INIT(&sq->sq_task, 0, mlx5e_tx_que, sq); - taskqueue_start_threads(&sq->sq_tq, 1, PI_NET, "%s tx sq", - c->ifp->if_xname); - +#ifdef RSS + cpu_id = rss_getcpu(c->ix % rss_getnumbuckets()); + CPU_SETOF(cpu_id, &cpu_mask); + taskqueue_start_threads_cpuset(&sq->sq_tq, 1, PI_NET, &cpu_mask, + "%s TX SQ%d.%d CPU%d", c->ifp->if_xname, c->ix, tc, cpu_id); +#else + taskqueue_start_threads(&sq->sq_tq, 1, PI_NET, + "%s TX SQ%d.%d", c->ifp->if_xname, c->ix, tc); +#endif snprintf(buffer, sizeof(buffer), "txstat%dtc%d", c->ix, tc); mlx5e_create_stats(&sq->stats.ctx, SYSCTL_CHILDREN(priv->sysctl_ifnet), buffer, mlx5e_sq_stats_desc, MLX5E_SQ_STATS_NUM, @@ -1768,8 +1778,14 @@ mlx5e_open_rqt(struct mlx5e_priv *priv) MLX5_SET(rqtc, rqtc, rqt_max_size, sz); for (i = 0; i < sz; i++) { - int ix = i % priv->params.num_channels; - + int ix; +#ifdef RSS + ix = rss_get_indirection_to_bucket(i); +#else + ix = i; +#endif + /* ensure we don't overflow */ + ix %= priv->params.num_channels; MLX5_SET(rqtc, rqtc, rq_num[i], priv->channel[ix]->rq.rqn); } @@ -1834,6 +1850,8 @@ mlx5e_build_tir_ctx(struct mlx5e_priv *p MLX5_CAP_ETH(priv->mdev, lro_timer_supported_periods[2])); } + + /* setup parameters for hashing TIR type, if any */ switch (tt) { case MLX5E_TT_ANY: MLX5_SET(tirc, tirc, disp_type, @@ -1848,8 +1866,16 @@ mlx5e_build_tir_ctx(struct mlx5e_priv *p priv->rqtn); MLX5_SET(tirc, tirc, rx_hash_fn, MLX5_TIRC_RX_HASH_FN_HASH_TOEPLITZ); - MLX5_SET(tirc, tirc, rx_hash_symmetric, 1); hkey = (__be32 *) MLX5_ADDR_OF(tirc, tirc, rx_hash_toeplitz_key); +#ifdef RSS + /* + * The FreeBSD RSS implementation does currently not + * support symmetric Toeplitz hashes: + */ + MLX5_SET(tirc, tirc, rx_hash_symmetric, 0); + rss_getkey((uint8_t *)hkey); +#else + MLX5_SET(tirc, tirc, rx_hash_symmetric, 1); hkey[0] = cpu_to_be32(0xD181C62C); hkey[1] = cpu_to_be32(0xF7F4DB5B); hkey[2] = cpu_to_be32(0x1983A2FC); @@ -1860,6 +1886,7 @@ mlx5e_build_tir_ctx(struct mlx5e_priv *p hkey[7] = cpu_to_be32(0x593D56D9); hkey[8] = cpu_to_be32(0xF3253C06); hkey[9] = cpu_to_be32(0x2ADC1FFC); +#endif break; } @@ -1869,6 +1896,12 @@ mlx5e_build_tir_ctx(struct mlx5e_priv *p MLX5_L3_PROT_TYPE_IPV4); MLX5_SET(rx_hash_field_select, hfso, l4_prot_type, MLX5_L4_PROT_TYPE_TCP); +#ifdef RSS + if (!(rss_gethashconfig() & RSS_HASHTYPE_RSS_TCP_IPV4)) { + MLX5_SET(rx_hash_field_select, hfso, selected_fields, + MLX5_HASH_IP); + } else +#endif MLX5_SET(rx_hash_field_select, hfso, selected_fields, MLX5_HASH_ALL); break; @@ -1878,6 +1911,12 @@ mlx5e_build_tir_ctx(struct mlx5e_priv *p MLX5_L3_PROT_TYPE_IPV6); MLX5_SET(rx_hash_field_select, hfso, l4_prot_type, MLX5_L4_PROT_TYPE_TCP); +#ifdef RSS + if (!(rss_gethashconfig() & RSS_HASHTYPE_RSS_TCP_IPV6)) { + MLX5_SET(rx_hash_field_select, hfso, selected_fields, + MLX5_HASH_IP); + } else +#endif MLX5_SET(rx_hash_field_select, hfso, selected_fields, MLX5_HASH_ALL); break; @@ -1887,6 +1926,12 @@ mlx5e_build_tir_ctx(struct mlx5e_priv *p MLX5_L3_PROT_TYPE_IPV4); MLX5_SET(rx_hash_field_select, hfso, l4_prot_type, MLX5_L4_PROT_TYPE_UDP); +#ifdef RSS + if (!(rss_gethashconfig() & RSS_HASHTYPE_RSS_UDP_IPV4)) { + MLX5_SET(rx_hash_field_select, hfso, selected_fields, + MLX5_HASH_IP); + } else +#endif MLX5_SET(rx_hash_field_select, hfso, selected_fields, MLX5_HASH_ALL); break; @@ -1896,6 +1941,12 @@ mlx5e_build_tir_ctx(struct mlx5e_priv *p MLX5_L3_PROT_TYPE_IPV6); MLX5_SET(rx_hash_field_select, hfso, l4_prot_type, MLX5_L4_PROT_TYPE_UDP); +#ifdef RSS + if (!(rss_gethashconfig() & RSS_HASHTYPE_RSS_UDP_IPV6)) { + MLX5_SET(rx_hash_field_select, hfso, selected_fields, + MLX5_HASH_IP); + } else +#endif MLX5_SET(rx_hash_field_select, hfso, selected_fields, MLX5_HASH_ALL); break; @@ -2052,6 +2103,13 @@ mlx5e_open_locked(struct ifnet *ifp) if (test_bit(MLX5E_STATE_OPENED, &priv->state) != 0) return (0); +#ifdef RSS + if (rss_getnumbuckets() > priv->params.num_channels) { + if_printf(ifp, "NOTE: There are more RSS buckets(%u) than " + "channels(%u) available\n", rss_getnumbuckets(), + priv->params.num_channels); + } +#endif err = mlx5e_open_tises(priv); if (err) { if_printf(ifp, "%s: mlx5e_open_tises failed, %d\n", Modified: head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c ============================================================================== --- head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c Mon Dec 7 12:20:26 2015 (r291937) +++ head/sys/dev/mlx5/mlx5_en/mlx5_en_rx.c Mon Dec 7 12:38:51 2015 (r291938) @@ -192,12 +192,43 @@ mlx5e_build_rx_mbuf(struct mlx5_cqe64 *c mb->m_pkthdr.len = mb->m_len = cqe_bcnt; /* check if a Toeplitz hash was computed */ - if (cqe->rss_hash_type != 0) + if (cqe->rss_hash_type != 0) { mb->m_pkthdr.flowid = be32_to_cpu(cqe->rss_hash_result); - else +#ifdef RSS + /* decode the RSS hash type */ + switch (cqe->rss_hash_type & + (CQE_RSS_DST_HTYPE_L4 | CQE_RSS_DST_HTYPE_IP)) { + /* IPv4 */ + case (CQE_RSS_DST_HTYPE_TCP | CQE_RSS_DST_HTYPE_IPV4): + M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_TCP_IPV4); + break; + case (CQE_RSS_DST_HTYPE_UDP | CQE_RSS_DST_HTYPE_IPV4): + M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_UDP_IPV4); + break; + case CQE_RSS_DST_HTYPE_IPV4: + M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_IPV4); + break; + /* IPv6 */ + case (CQE_RSS_DST_HTYPE_TCP | CQE_RSS_DST_HTYPE_IPV6): + M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_TCP_IPV6); + break; + case (CQE_RSS_DST_HTYPE_UDP | CQE_RSS_DST_HTYPE_IPV6): + M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_UDP_IPV6); + break; + case CQE_RSS_DST_HTYPE_IPV6: + M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_IPV6); + break; + default: /* Other */ + M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE); + break; + } +#else + M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE); +#endif + } else { mb->m_pkthdr.flowid = rq->ix; - - M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE); + M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE); + } mb->m_pkthdr.rcvif = ifp; if (likely(ifp->if_capenable & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) && Modified: head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c ============================================================================== --- head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Mon Dec 7 12:20:26 2015 (r291937) +++ head/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Mon Dec 7 12:38:51 2015 (r291938) @@ -85,7 +85,15 @@ mlx5e_select_queue(struct ifnet *ifp, st /* check if flowid is set */ if (M_HASHTYPE_GET(mb) != M_HASHTYPE_NONE) { - ch = (mb->m_pkthdr.flowid % 128) % ch; +#ifdef RSS + u32 temp; + + if (rss_hash2bucket(mb->m_pkthdr.flowid, + M_HASHTYPE_GET(mb), &temp) == 0) + ch = temp % ch; + else +#endif + ch = (mb->m_pkthdr.flowid % 128) % ch; } else { #if (__FreeBSD_version >= 1100000) ch = m_ether_tcpip_hash(MBUF_HASHFLAG_L3 | Modified: head/sys/modules/mlx5/Makefile ============================================================================== --- head/sys/modules/mlx5/Makefile Mon Dec 7 12:20:26 2015 (r291937) +++ head/sys/modules/mlx5/Makefile Mon Dec 7 12:38:51 2015 (r291938) @@ -24,7 +24,7 @@ mlx5_uar.c \ mlx5_vport.c \ mlx5_wq.c \ device_if.h bus_if.h vnode_if.h pci_if.h \ - opt_inet.h opt_inet6.h opt_random.h + opt_inet.h opt_inet6.h opt_random.h opt_rss.h CFLAGS+= -I${.CURDIR}/../../ofed/include CFLAGS+= -I${.CURDIR}/../../compat/linuxkpi/common/include Modified: head/sys/modules/mlx5en/Makefile ============================================================================== --- head/sys/modules/mlx5en/Makefile Mon Dec 7 12:20:26 2015 (r291937) +++ head/sys/modules/mlx5en/Makefile Mon Dec 7 12:38:51 2015 (r291938) @@ -10,7 +10,7 @@ mlx5_en_flow_table.c \ mlx5_en_rx.c \ mlx5_en_txrx.c \ device_if.h bus_if.h vnode_if.h pci_if.h \ - opt_inet.h opt_inet6.h + opt_inet.h opt_inet6.h opt_rss.h .if defined(HAVE_TURBO_LRO) CFLAGS+= -DHAVE_TURBO_LRO _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "[email protected]"
