diff options
| -rw-r--r-- | share/man/man4/sfxge.4 | 4 | ||||
| -rw-r--r-- | sys/dev/sfxge/sfxge.c | 7 | ||||
| -rw-r--r-- | sys/dev/sfxge/sfxge.h | 1 | ||||
| -rw-r--r-- | sys/dev/sfxge/sfxge_intr.c | 3 |
4 files changed, 15 insertions, 0 deletions
diff --git a/share/man/man4/sfxge.4 b/share/man/man4/sfxge.4 index e6fe6a4..e4b0b94 100644 --- a/share/man/man4/sfxge.4 +++ b/share/man/man4/sfxge.4 @@ -108,6 +108,10 @@ If a packet is dropped, the .Va tx_early_drops counter is incremented and the local sender receives ENOBUFS. The value must be greater than or equal to 0. +.It Va hw.sfxge.N.max_rss_channels +The maximum number of allocated RSS channels for the Nth adapter. +If set to 0 or unset, the number of channels is determined by the number +of CPU cores. .El .Sh SUPPORT For general information and support, diff --git a/sys/dev/sfxge/sfxge.c b/sys/dev/sfxge/sfxge.c index c0850ec..7ecc6b4 100644 --- a/sys/dev/sfxge/sfxge.c +++ b/sys/dev/sfxge/sfxge.c @@ -397,11 +397,18 @@ sfxge_create(struct sfxge_softc *sc) device_t dev; efx_nic_t *enp; int error; + char rss_param_name[sizeof(SFXGE_PARAM(%d.max_rss_channels))]; dev = sc->dev; sx_init(&sc->softc_lock, "sfxge_softc"); + sc->max_rss_channels = 0; + snprintf(rss_param_name, sizeof(rss_param_name), + SFXGE_PARAM(%d.max_rss_channels), + (int)device_get_unit(dev)); + TUNABLE_INT_FETCH(rss_param_name, &sc->max_rss_channels); + sc->stats_node = SYSCTL_ADD_NODE( device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), diff --git a/sys/dev/sfxge/sfxge.h b/sys/dev/sfxge/sfxge.h index b148f75..6157b23 100644 --- a/sys/dev/sfxge/sfxge.h +++ b/sys/dev/sfxge/sfxge.h @@ -230,6 +230,7 @@ struct sfxge_softc { uint64_t ev_stats[EV_NQSTATS]; #endif + unsigned int max_rss_channels; uma_zone_t rxq_cache; struct sfxge_rxq *rxq[SFXGE_RX_SCALE_MAX]; unsigned int rx_indir_table[SFXGE_RX_SCALE_MAX]; diff --git a/sys/dev/sfxge/sfxge_intr.c b/sys/dev/sfxge/sfxge_intr.c index 9398783..9773a24 100644 --- a/sys/dev/sfxge/sfxge_intr.c +++ b/sys/dev/sfxge/sfxge_intr.c @@ -302,6 +302,9 @@ sfxge_intr_setup_msix(struct sfxge_softc *sc) if (count > EFX_MAXRSS) count = EFX_MAXRSS; + if (sc->max_rss_channels > 0 && count > sc->max_rss_channels) + count = sc->max_rss_channels; + rid = PCIR_BAR(4); resp = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); if (resp == NULL) |
