Date: Wed, 26 Oct 2016 18:13:30 +0000 (UTC) From: David C Somayajulu <davidcs@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r307973 - stable/10/sys/dev/bxe Message-ID: <201610261813.u9QIDUcf052351@repo.freebsd.org>
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Author: davidcs Date: Wed Oct 26 18:13:30 2016 New Revision: 307973 URL: https://svnweb.freebsd.org/changeset/base/307973 Log: MFC r307578 1. Use taskqueue_create() instead of taskqueue_create_fast() for both fastpath and slowpath taskqueues. 2. Service all transmits in taskqueue threads. 3. additional stats counters for keeping track of - bd availability - tx buf ring not emptied in the fp task queue. These are drained via timeout taskqueue. - tx attempts during link down. Modified: stable/10/sys/dev/bxe/bxe.c stable/10/sys/dev/bxe/bxe.h stable/10/sys/dev/bxe/bxe_stats.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/bxe/bxe.c ============================================================================== --- stable/10/sys/dev/bxe/bxe.c Wed Oct 26 17:53:12 2016 (r307972) +++ stable/10/sys/dev/bxe/bxe.c Wed Oct 26 18:13:30 2016 (r307973) @@ -27,7 +27,7 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); -#define BXE_DRIVER_VERSION "1.78.81" +#define BXE_DRIVER_VERSION "1.78.89" #include "bxe.h" #include "ecore_sp.h" @@ -500,7 +500,14 @@ static const struct { { STATS_OFFSET32(mbuf_alloc_tpa), 4, STATS_FLAGS_FUNC, "mbuf_alloc_tpa"}, { STATS_OFFSET32(tx_queue_full_return), - 4, STATS_FLAGS_FUNC, "tx_queue_full_return"} + 4, STATS_FLAGS_FUNC, "tx_queue_full_return"}, + { STATS_OFFSET32(tx_request_link_down_failures), + 4, STATS_FLAGS_FUNC, "tx_request_link_down_failures"}, + { STATS_OFFSET32(bd_avail_too_less_failures), + 4, STATS_FLAGS_FUNC, "bd_avail_too_less_failures"}, + { STATS_OFFSET32(tx_mq_not_empty), + 4, STATS_FLAGS_FUNC, "tx_mq_not_empty"} + }; static const struct { @@ -613,7 +620,14 @@ static const struct { { Q_STATS_OFFSET32(mbuf_alloc_tpa), 4, "mbuf_alloc_tpa"}, { Q_STATS_OFFSET32(tx_queue_full_return), - 4, "tx_queue_full_return"} + 4, "tx_queue_full_return"}, + { Q_STATS_OFFSET32(tx_request_link_down_failures), + 4, "tx_request_link_down_failures"}, + { Q_STATS_OFFSET32(bd_avail_too_less_failures), + 4, "bd_avail_too_less_failures"}, + { Q_STATS_OFFSET32(tx_mq_not_empty), + 4, "tx_mq_not_empty"} + }; #define BXE_NUM_ETH_STATS ARRAY_SIZE(bxe_eth_stats_arr) @@ -5612,7 +5626,7 @@ bxe_tx_start(struct ifnet *ifp) BXE_FP_TX_UNLOCK(fp); } -#if __FreeBSD_version >= 800000 +#if __FreeBSD_version >= 901504 static int bxe_tx_mq_start_locked(struct bxe_softc *sc, @@ -5634,10 +5648,16 @@ bxe_tx_mq_start_locked(struct bxe_softc return (EINVAL); } - if (!sc->link_vars.link_up || - (ifp->if_drv_flags & - (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != IFF_DRV_RUNNING) { + if (m != NULL) { rc = drbr_enqueue(ifp, tx_br, m); + if (rc != 0) { + fp->eth_q_stats.tx_soft_errors++; + goto bxe_tx_mq_start_locked_exit; + } + } + + if (!sc->link_vars.link_up || !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { + fp->eth_q_stats.tx_request_link_down_failures++; goto bxe_tx_mq_start_locked_exit; } @@ -5647,24 +5667,22 @@ bxe_tx_mq_start_locked(struct bxe_softc fp->eth_q_stats.tx_max_drbr_queue_depth = depth; } - if (m == NULL) { - /* no new work, check for pending frames */ - next = drbr_dequeue(ifp, tx_br); - } else if (drbr_needs_enqueue(ifp, tx_br)) { - /* have both new and pending work, maintain packet order */ - rc = drbr_enqueue(ifp, tx_br, m); - if (rc != 0) { - fp->eth_q_stats.tx_soft_errors++; - goto bxe_tx_mq_start_locked_exit; - } - next = drbr_dequeue(ifp, tx_br); - } else { - /* new work only and nothing pending */ - next = m; - } - /* keep adding entries while there are frames to send */ - while (next != NULL) { + while ((next = drbr_peek(ifp, tx_br)) != NULL) { + /* handle any completions if we're running low */ + tx_bd_avail = bxe_tx_avail(sc, fp); + if (tx_bd_avail < BXE_TX_CLEANUP_THRESHOLD) { + /* bxe_txeof will set IFF_DRV_OACTIVE appropriately */ + bxe_txeof(sc, fp); + tx_bd_avail = bxe_tx_avail(sc, fp); + if (tx_bd_avail < (BXE_TSO_MAX_SEGMENTS + 1)) { + fp->eth_q_stats.bd_avail_too_less_failures++; + m_freem(next); + drbr_advance(ifp, tx_br); + rc = ENOBUFS; + break; + } + } /* the mbuf now belongs to us */ fp->eth_q_stats.mbuf_alloc_tx++; @@ -5680,11 +5698,11 @@ bxe_tx_mq_start_locked(struct bxe_softc if (next != NULL) { /* mark the TX queue as full and save the frame */ ifp->if_drv_flags |= IFF_DRV_OACTIVE; - /* XXX this may reorder the frame */ - rc = drbr_enqueue(ifp, tx_br, next); + drbr_putback(ifp, tx_br, next); fp->eth_q_stats.mbuf_alloc_tx--; fp->eth_q_stats.tx_frames_deferred++; - } + } else + drbr_advance(ifp, tx_br); /* stop looking for more work */ break; @@ -5696,18 +5714,7 @@ bxe_tx_mq_start_locked(struct bxe_softc /* send a copy of the frame to any BPF listeners */ BPF_MTAP(ifp, next); - tx_bd_avail = bxe_tx_avail(sc, fp); - - /* handle any completions if we're running low */ - if (tx_bd_avail < BXE_TX_CLEANUP_THRESHOLD) { - /* bxe_txeof will set IFF_DRV_OACTIVE appropriately */ - bxe_txeof(sc, fp); - if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { - break; - } - } - - next = drbr_dequeue(ifp, tx_br); + drbr_advance(ifp, tx_br); } /* all TX packets were dequeued and/or the tx ring is full */ @@ -5717,10 +5724,28 @@ bxe_tx_mq_start_locked(struct bxe_softc } bxe_tx_mq_start_locked_exit: + /* If we didn't drain the drbr, enqueue a task in the future to do it. */ + if (!drbr_empty(ifp, tx_br)) { + fp->eth_q_stats.tx_mq_not_empty++; + taskqueue_enqueue_timeout(fp->tq, &fp->tx_timeout_task, 1); + } return (rc); } +static void +bxe_tx_mq_start_deferred(void *arg, + int pending) +{ + struct bxe_fastpath *fp = (struct bxe_fastpath *)arg; + struct bxe_softc *sc = fp->sc; + struct ifnet *ifp = sc->ifnet; + + BXE_FP_TX_LOCK(fp); + bxe_tx_mq_start_locked(sc, ifp, fp, NULL); + BXE_FP_TX_UNLOCK(fp); +} + /* Multiqueue (TSS) dispatch routine. */ static int bxe_tx_mq_start(struct ifnet *ifp, @@ -5742,8 +5767,10 @@ bxe_tx_mq_start(struct ifnet *ifp, if (BXE_FP_TX_TRYLOCK(fp)) { rc = bxe_tx_mq_start_locked(sc, ifp, fp, m); BXE_FP_TX_UNLOCK(fp); - } else + } else { rc = drbr_enqueue(ifp, fp->tx_br, m); + taskqueue_enqueue(fp->tq, &fp->tx_task); + } return (rc); } @@ -5778,7 +5805,7 @@ bxe_mq_flush(struct ifnet *ifp) if_qflush(ifp); } -#endif /* FreeBSD_version >= 800000 */ +#endif /* FreeBSD_version >= 901504 */ static uint16_t bxe_cid_ilt_lines(struct bxe_softc *sc) @@ -6138,7 +6165,7 @@ bxe_free_fp_buffers(struct bxe_softc *sc for (i = 0; i < sc->num_queues; i++) { fp = &sc->fp[i]; -#if __FreeBSD_version >= 800000 +#if __FreeBSD_version >= 901504 if (fp->tx_br != NULL) { /* just in case bxe_mq_flush() wasn't called */ if (mtx_initialized(&fp->tx_mtx)) { @@ -6965,6 +6992,8 @@ bxe_link_attn(struct bxe_softc *sc) uint32_t pause_enabled = 0; struct host_port_stats *pstats; int cmng_fns; + struct bxe_fastpath *fp; + int i; /* Make sure that we are synced with the current statistics */ bxe_stats_handle(sc, STATS_EVENT_STOP); @@ -6996,6 +7025,12 @@ bxe_link_attn(struct bxe_softc *sc) if (sc->state == BXE_STATE_OPEN) { bxe_stats_handle(sc, STATS_EVENT_LINK_UP); } + + /* Restart tx when the link comes back. */ + FOR_EACH_ETH_QUEUE(sc, i) { + fp = &sc->fp[i]; + taskqueue_enqueue(fp->tq, &fp->tx_task); + } } if (sc->link_vars.link_up && sc->link_vars.line_speed) { @@ -9047,6 +9082,10 @@ bxe_interrupt_detach(struct bxe_softc *s fp = &sc->fp[i]; if (fp->tq) { taskqueue_drain(fp->tq, &fp->tq_task); + taskqueue_drain(fp->tq, &fp->tx_task); + while (taskqueue_cancel_timeout(fp->tq, &fp->tx_timeout_task, + NULL)) + taskqueue_drain_timeout(fp->tq, &fp->tx_timeout_task); taskqueue_free(fp->tq); fp->tq = NULL; } @@ -9079,9 +9118,9 @@ bxe_interrupt_attach(struct bxe_softc *s snprintf(sc->sp_tq_name, sizeof(sc->sp_tq_name), "bxe%d_sp_tq", sc->unit); TASK_INIT(&sc->sp_tq_task, 0, bxe_handle_sp_tq, sc); - sc->sp_tq = taskqueue_create_fast(sc->sp_tq_name, M_NOWAIT, - taskqueue_thread_enqueue, - &sc->sp_tq); + sc->sp_tq = taskqueue_create(sc->sp_tq_name, M_NOWAIT, + taskqueue_thread_enqueue, + &sc->sp_tq); taskqueue_start_threads(&sc->sp_tq, 1, PWAIT, /* lower priority */ "%s", sc->sp_tq_name); @@ -9091,9 +9130,12 @@ bxe_interrupt_attach(struct bxe_softc *s snprintf(fp->tq_name, sizeof(fp->tq_name), "bxe%d_fp%d_tq", sc->unit, i); TASK_INIT(&fp->tq_task, 0, bxe_handle_fp_tq, fp); - fp->tq = taskqueue_create_fast(fp->tq_name, M_NOWAIT, - taskqueue_thread_enqueue, - &fp->tq); + TASK_INIT(&fp->tx_task, 0, bxe_tx_mq_start_deferred, fp); + fp->tq = taskqueue_create(fp->tq_name, M_NOWAIT, + taskqueue_thread_enqueue, + &fp->tq); + TIMEOUT_TASK_INIT(fp->tq, &fp->tx_timeout_task, 0, + bxe_tx_mq_start_deferred, fp); taskqueue_start_threads(&fp->tq, 1, PI_NET, /* higher priority */ "%s", fp->tq_name); } @@ -12150,8 +12192,6 @@ static void bxe_periodic_callout_func(void *xsc) { struct bxe_softc *sc = (struct bxe_softc *)xsc; - struct bxe_fastpath *fp; - uint16_t tx_bd_avail; int i; if (!BXE_CORE_TRYLOCK(sc)) { @@ -12174,47 +12214,6 @@ bxe_periodic_callout_func(void *xsc) return; } -#if __FreeBSD_version >= 800000 - - FOR_EACH_QUEUE(sc, i) { - fp = &sc->fp[i]; - - if (BXE_FP_TX_TRYLOCK(fp)) { - struct ifnet *ifp = sc->ifnet; - /* - * If interface was stopped due to unavailable - * bds, try to process some tx completions - */ - (void) bxe_txeof(sc, fp); - - tx_bd_avail = bxe_tx_avail(sc, fp); - if (tx_bd_avail >= BXE_TX_CLEANUP_THRESHOLD) { - bxe_tx_mq_start_locked(sc, ifp, fp, NULL); - } - BXE_FP_TX_UNLOCK(fp); - } - } - -#else - - fp = &sc->fp[0]; - if (BXE_FP_TX_TRYLOCK(fp)) { - struct ifnet *ifp = sc->ifnet; - /* - * If interface was stopped due to unavailable - * bds, try to process some tx completions - */ - (void) bxe_txeof(sc, fp); - - tx_bd_avail = bxe_tx_avail(sc, fp); - if (tx_bd_avail >= BXE_TX_CLEANUP_THRESHOLD) { - bxe_tx_start_locked(sc, ifp, fp); - } - - BXE_FP_TX_UNLOCK(fp); - } - -#endif /* #if __FreeBSD_version >= 800000 */ /* Check for TX timeouts on any fastpath. */ FOR_EACH_QUEUE(sc, i) { @@ -12690,7 +12689,7 @@ bxe_init_ifnet(struct bxe_softc *sc) ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); ifp->if_ioctl = bxe_ioctl; ifp->if_start = bxe_tx_start; -#if __FreeBSD_version >= 800000 +#if __FreeBSD_version >= 901504 ifp->if_transmit = bxe_tx_mq_start; ifp->if_qflush = bxe_mq_flush; #endif @@ -15737,7 +15736,7 @@ bxe_add_sysctls(struct bxe_softc *sc) static int bxe_alloc_buf_rings(struct bxe_softc *sc) { -#if __FreeBSD_version >= 800000 +#if __FreeBSD_version >= 901504 int i; struct bxe_fastpath *fp; @@ -15758,7 +15757,7 @@ bxe_alloc_buf_rings(struct bxe_softc *sc static void bxe_free_buf_rings(struct bxe_softc *sc) { -#if __FreeBSD_version >= 800000 +#if __FreeBSD_version >= 901504 int i; struct bxe_fastpath *fp; Modified: stable/10/sys/dev/bxe/bxe.h ============================================================================== --- stable/10/sys/dev/bxe/bxe.h Wed Oct 26 17:53:12 2016 (r307972) +++ stable/10/sys/dev/bxe/bxe.h Wed Oct 26 18:13:30 2016 (r307973) @@ -644,6 +644,9 @@ struct bxe_fastpath { struct taskqueue *tq; char tq_name[32]; + struct task tx_task; + struct timeout_task tx_timeout_task; + /* ethernet client ID (each fastpath set of RX/TX/CQE is a client) */ uint8_t cl_id; #define FP_CL_ID(fp) (fp->cl_id) @@ -2300,7 +2303,8 @@ void bxe_dump_mbuf_data(struct bxe_softc extern int bxe_grc_dump(struct bxe_softc *sc); #if __FreeBSD_version >= 800000 -#if __FreeBSD_version >= 1000000 +#if (__FreeBSD_version >= 1001513 && __FreeBSD_version < 1100000) ||\ + __FreeBSD_version >= 1100048 #define BXE_SET_FLOWID(m) M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE) #define BXE_VALID_FLOWID(m) (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) #else Modified: stable/10/sys/dev/bxe/bxe_stats.h ============================================================================== --- stable/10/sys/dev/bxe/bxe_stats.h Wed Oct 26 17:53:12 2016 (r307972) +++ stable/10/sys/dev/bxe/bxe_stats.h Wed Oct 26 18:13:30 2016 (r307973) @@ -266,6 +266,10 @@ struct bxe_eth_stats { /* num. of times tx queue full occured */ uint32_t tx_queue_full_return; + /* debug stats */ + uint32_t tx_request_link_down_failures; + uint32_t bd_avail_too_less_failures; + uint32_t tx_mq_not_empty; }; @@ -372,6 +376,11 @@ struct bxe_eth_q_stats { /* num. of times tx queue full occured */ uint32_t tx_queue_full_return; + + /* debug stats */ + uint32_t tx_request_link_down_failures; + uint32_t bd_avail_too_less_failures; + uint32_t tx_mq_not_empty; }; struct bxe_eth_stats_old {
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