Date: Mon, 12 Sep 2022 18:48:16 GMT From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 998eb37aca66 - main - cxgbe(4): Add knob to control congestion behavior for TOE queues. Message-ID: <202209121848.28CImGgZ038471@gitrepo.freebsd.org>
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The branch main has been updated by np: URL: https://cgit.FreeBSD.org/src/commit/?id=998eb37aca6670b1ecbb7b5cad2b5b2d85d744b8 commit 998eb37aca6670b1ecbb7b5cad2b5b2d85d744b8 Author: Navdeep Parhar <np@FreeBSD.org> AuthorDate: 2022-09-09 22:21:18 +0000 Commit: Navdeep Parhar <np@FreeBSD.org> CommitDate: 2022-09-12 18:40:35 +0000 cxgbe(4): Add knob to control congestion behavior for TOE queues. hw.cxgbe.ofld_cong_drop works just like hw.cxgbe.cong_drop but for TOE rx queues. MFC after: 2 weeks Sponsored by: Chelsio Communications --- sys/dev/cxgbe/t4_sge.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/sys/dev/cxgbe/t4_sge.c b/sys/dev/cxgbe/t4_sge.c index 9e75d1d96bad..0ee8d709eca4 100644 --- a/sys/dev/cxgbe/t4_sge.c +++ b/sys/dev/cxgbe/t4_sge.c @@ -129,6 +129,11 @@ SYSCTL_INT(_hw_cxgbe, OID_AUTO, spg_len, CTLFLAG_RDTUN, &spg_len, 0, static int cong_drop = 0; SYSCTL_INT(_hw_cxgbe, OID_AUTO, cong_drop, CTLFLAG_RDTUN, &cong_drop, 0, "Congestion control for NIC RX queues (0 = backpressure, 1 = drop, 2 = both"); +#ifdef TCP_OFFLOAD +static int ofld_cong_drop = 0; +SYSCTL_INT(_hw_cxgbe, OID_AUTO, ofld_cong_drop, CTLFLAG_RDTUN, &ofld_cong_drop, 0, + "Congestion control for TOE RX queues (0 = backpressure, 1 = drop, 2 = both"); +#endif /* * Deliver multiple frames in the same free list buffer if they fit. @@ -560,6 +565,13 @@ t4_sge_modload(void) " using 0 instead.\n", cong_drop); cong_drop = 0; } +#ifdef TCP_OFFLOAD + if (ofld_cong_drop < -1 || ofld_cong_drop > 2) { + printf("Invalid hw.cxgbe.ofld_cong_drop value (%d)," + " using 0 instead.\n", ofld_cong_drop); + ofld_cong_drop = 0; + } +#endif if (tscale != 1 && (tscale < 3 || tscale > 17)) { printf("Invalid hw.cxgbe.tscale value (%d)," @@ -1004,6 +1016,10 @@ t4_sge_sysctls(struct adapter *sc, struct sysctl_ctx_list *ctx, SYSCTL_ADD_INT(ctx, children, OID_AUTO, "cong_drop", CTLFLAG_RD, NULL, cong_drop, "congestion drop setting"); +#ifdef TCP_OFFLOAD + SYSCTL_ADD_INT(ctx, children, OID_AUTO, "ofld_cong_drop", CTLFLAG_RD, + NULL, ofld_cong_drop, "congestion drop setting"); +#endif SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pack", CTLFLAG_RD, NULL, sp->pack_boundary, "payload pack boundary (bytes)"); @@ -4113,7 +4129,7 @@ alloc_ofld_rxq(struct vi_info *vi, struct sge_ofld_rxq *ofld_rxq, int idx, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "offload rx queue"); init_iq(&ofld_rxq->iq, sc, vi->ofld_tmr_idx, vi->ofld_pktc_idx, - vi->qsize_rxq, intr_idx, 0, IQ_OFLD); + vi->qsize_rxq, intr_idx, ofld_cong_drop, IQ_OFLD); snprintf(name, sizeof(name), "%s ofld_rxq%d-fl", device_get_nameunit(vi->dev), idx); init_fl(sc, &ofld_rxq->fl, vi->qsize_rxq / 8, maxp, name);
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