diff options
Diffstat (limited to 'sys/dev/cxgbe/t4_netmap.c')
| -rw-r--r-- | sys/dev/cxgbe/t4_netmap.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/sys/dev/cxgbe/t4_netmap.c b/sys/dev/cxgbe/t4_netmap.c index c739146..f54a67f 100644 --- a/sys/dev/cxgbe/t4_netmap.c +++ b/sys/dev/cxgbe/t4_netmap.c @@ -77,6 +77,15 @@ int holdoff_tmr_idx = 2; SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_holdoff_tmr_idx, CTLFLAG_RWTUN, &holdoff_tmr_idx, 0, "Holdoff timer index for netmap rx queues."); +/* + * Congestion drops. + * -1: no congestion feedback (not recommended). + * 0: backpressure the channel instead of dropping packets right away. + * 1: no backpressure, drop packets for the congested queue immediately. + */ +static int nm_cong_drop = 1; +TUNABLE_INT("hw.cxgbe.nm_cong_drop", &nm_cong_drop); + /* netmap ifnet routines */ static void cxgbe_nm_init(void *); static int cxgbe_nm_ioctl(struct ifnet *, unsigned long, caddr_t); @@ -405,8 +414,8 @@ alloc_nm_txq_hwq(struct port_info *pi, struct sge_nm_txq *nm_txq) V_FW_EQ_ETH_CMD_VFN(0)); c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC | F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c)); - c.autoequiqe_to_viid = htobe32(F_FW_EQ_ETH_CMD_AUTOEQUEQE | - V_FW_EQ_ETH_CMD_VIID(pi->nm_viid)); + c.autoequiqe_to_viid = htobe32(F_FW_EQ_ETH_CMD_AUTOEQUIQE | + F_FW_EQ_ETH_CMD_AUTOEQUEQE | V_FW_EQ_ETH_CMD_VIID(pi->nm_viid)); c.fetchszm_to_iqid = htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | V_FW_EQ_ETH_CMD_PCIECHN(pi->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO | @@ -503,7 +512,7 @@ cxgbe_netmap_on(struct adapter *sc, struct port_info *pi, struct ifnet *ifp, nm_set_native_flags(na); for_each_nm_rxq(pi, i, nm_rxq) { - alloc_nm_rxq_hwq(pi, nm_rxq, tnl_cong(pi)); + alloc_nm_rxq_hwq(pi, nm_rxq, tnl_cong(pi, nm_cong_drop)); nm_rxq->fl_hwidx = hwidx; slot = netmap_reset(na, NR_RX, i, 0); MPASS(slot != NULL); /* XXXNM: error check, not assert */ |
