Date: Wed, 5 Feb 2020 00:13:15 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r357553 - head/sys/dev/cxgbe Message-ID: <202002050013.0150DFCC027900@repo.freebsd.org>
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Author: np Date: Wed Feb 5 00:13:15 2020 New Revision: 357553 URL: https://svnweb.freebsd.org/changeset/base/357553 Log: cxgbe(4): Add a knob to allow netmap tx traffic to be checksummed by the hardware. hw.cxgbe.nm_txcsum=1 MFC after: 2 weeks Sponsored by: Chelsio Communications Modified: head/sys/dev/cxgbe/t4_netmap.c Modified: head/sys/dev/cxgbe/t4_netmap.c ============================================================================== --- head/sys/dev/cxgbe/t4_netmap.c Wed Feb 5 00:08:58 2020 (r357552) +++ head/sys/dev/cxgbe/t4_netmap.c Wed Feb 5 00:13:15 2020 (r357553) @@ -110,6 +110,16 @@ static int nm_split_rss = 0; SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_split_rss, CTLFLAG_RWTUN, &nm_split_rss, 0, "Split the netmap rx queues into two groups."); +/* + * netmap(4) says "netmap does not use features such as checksum offloading, TCP + * segmentation offloading, encryption, VLAN encapsulation/decapsulation, etc." + * but this knob can be used to get the hardware to checksum all tx traffic + * anyway. + */ +static int nm_txcsum = 0; +SYSCTL_INT(_hw_cxgbe, OID_AUTO, nm_txcsum, CTLFLAG_RWTUN, + &nm_txcsum, 0, "Enable transmit checksum offloading."); + static int alloc_nm_rxq_hwq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq, int cong) { @@ -696,13 +706,8 @@ cxgbe_nm_tx(struct adapter *sc, struct sge_nm_txq *nm_ cpl->ctrl0 = nm_txq->cpl_ctrl0; cpl->pack = 0; cpl->len = htobe16(slot->len); - /* - * netmap(4) says "netmap does not use features such as - * checksum offloading, TCP segmentation offloading, - * encryption, VLAN encapsulation/decapsulation, etc." - */ - cpl->ctrl1 = htobe64(F_TXPKT_IPCSUM_DIS | - F_TXPKT_L4CSUM_DIS); + cpl->ctrl1 = nm_txcsum ? 0 : + htobe64(F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS); usgl = (void *)(cpl + 1); usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
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