diff options
| author | np <np@FreeBSD.org> | 2015-02-24 18:40:10 +0000 |
|---|---|---|
| committer | np <np@FreeBSD.org> | 2015-02-24 18:40:10 +0000 |
| commit | a440d3c6946f1e8915cdd335eb020896cf1c57b4 (patch) | |
| tree | 7142e7be3e4f7d45ea3686d3d09913cbd2d59d1a /sys/dev/cxgbe/t4_netmap.c | |
| parent | 7fa70f2f6509b633511f2e20b1eb1a0163321594 (diff) | |
| download | FreeBSD-src-a440d3c6946f1e8915cdd335eb020896cf1c57b4.zip FreeBSD-src-a440d3c6946f1e8915cdd335eb020896cf1c57b4.tar.gz | |
cxgbe(4): set up congestion management for netmap rx queues.
The hw.cxgbe.cong_drop knob controls the response of the chip when
netmap queues are congested.
Diffstat (limited to 'sys/dev/cxgbe/t4_netmap.c')
| -rw-r--r-- | sys/dev/cxgbe/t4_netmap.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/sys/dev/cxgbe/t4_netmap.c b/sys/dev/cxgbe/t4_netmap.c index 1f97b9b..c0bdfe3 100644 --- a/sys/dev/cxgbe/t4_netmap.c +++ b/sys/dev/cxgbe/t4_netmap.c @@ -226,9 +226,9 @@ cxgbe_nm_qflush(struct ifnet *ifp) } static int -alloc_nm_rxq_hwq(struct port_info *pi, struct sge_nm_rxq *nm_rxq) +alloc_nm_rxq_hwq(struct port_info *pi, struct sge_nm_rxq *nm_rxq, int cong) { - int rc, cntxt_id; + int rc, cntxt_id, i; __be32 v; struct adapter *sc = pi->adapter; struct netmap_adapter *na = NA(pi->nm_ifp); @@ -267,6 +267,11 @@ alloc_nm_rxq_hwq(struct port_info *pi, struct sge_nm_rxq *nm_rxq) V_FW_IQ_CMD_IQESIZE(ilog2(IQ_ESIZE) - 4)); c.iqsize = htobe16(pi->qsize_rxq); c.iqaddr = htobe64(nm_rxq->iq_ba); + if (cong >= 0) { + c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN | + V_FW_IQ_CMD_FL0CNGCHMAP(cong) | F_FW_IQ_CMD_FL0CONGCIF | + F_FW_IQ_CMD_FL0CONGEN); + } c.iqns_to_fl0congen |= htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | @@ -310,6 +315,34 @@ alloc_nm_rxq_hwq(struct port_info *pi, struct sge_nm_rxq *nm_rxq) if (is_t5(sc)) nm_rxq->fl_db_val |= F_DBTYPE; + if (is_t5(sc) && cong >= 0) { + uint32_t param, val; + + param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | + V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | + V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id); + param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | + V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | + V_FW_PARAMS_PARAM_YZ(nm_rxq->iq_cntxt_id); + if (cong == 0) + val = 1 << 19; + else { + val = 2 << 19; + for (i = 0; i < 4; i++) { + if (cong & (1 << i)) + val |= 1 << (i << 2); + } + } + + rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, ¶m, &val); + if (rc != 0) { + /* report error but carry on */ + device_printf(sc->dev, + "failed to set congestion manager context for " + "ingress queue %d: %d\n", nm_rxq->iq_cntxt_id, rc); + } + } + t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_SEINTARM(V_QINTR_TIMER_IDX(1)) | V_INGRESSQID(nm_rxq->iq_cntxt_id)); @@ -450,7 +483,7 @@ 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); + alloc_nm_rxq_hwq(pi, nm_rxq, tnl_cong(pi)); nm_rxq->fl_hwidx = hwidx; slot = netmap_reset(na, NR_RX, i, 0); MPASS(slot != NULL); /* XXXNM: error check, not assert */ |
