From owner-dev-commits-src-all@freebsd.org Sun Apr 11 18:27:36 2021 Return-Path: Delivered-To: dev-commits-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 1D9015D7BD5; Sun, 11 Apr 2021 18:27:36 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FJL2J0JChz4Rjv; Sun, 11 Apr 2021 18:27:36 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id F17CABCA; Sun, 11 Apr 2021 18:27:35 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 13BIRZYL002208; Sun, 11 Apr 2021 18:27:35 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 13BIRZuU002207; Sun, 11 Apr 2021 18:27:35 GMT (envelope-from git) Date: Sun, 11 Apr 2021 18:27:35 GMT Message-Id: <202104111827.13BIRZuU002207@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Hans Petter Selasky Subject: git: 5a3426f453f9 - main - if_smsc: Add the ability to disable "turbo_mode", also called RX frame batching, similarly to the Linux driver, by a tunable read only sysctl. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: hselasky X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 5a3426f453f970edda38367bea5ebf7385c3819d Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 Apr 2021 18:27:36 -0000 The branch main has been updated by hselasky: URL: https://cgit.FreeBSD.org/src/commit/?id=5a3426f453f970edda38367bea5ebf7385c3819d commit 5a3426f453f970edda38367bea5ebf7385c3819d Author: Hans Petter Selasky AuthorDate: 2021-04-11 18:24:41 +0000 Commit: Hans Petter Selasky CommitDate: 2021-04-11 18:25:58 +0000 if_smsc: Add the ability to disable "turbo_mode", also called RX frame batching, similarly to the Linux driver, by a tunable read only sysctl. Submitted by: Oleg Sidorkin PR: 254884 MFC after: 1 week Sponsored by: Mellanox Technologies // NVIDIA Networking --- sys/dev/usb/net/if_smsc.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/sys/dev/usb/net/if_smsc.c b/sys/dev/usb/net/if_smsc.c index 84610c894f4d..85cc955b9fbf 100644 --- a/sys/dev/usb/net/if_smsc.c +++ b/sys/dev/usb/net/if_smsc.c @@ -119,11 +119,19 @@ __FBSDID("$FreeBSD$"); #include "miibus_if.h" +SYSCTL_NODE(_hw_usb, OID_AUTO, smsc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, + "USB smsc"); + +static bool smsc_rx_packet_batching = 1; + +SYSCTL_BOOL(_hw_usb_smsc, OID_AUTO, smsc_rx_packet_batching, CTLFLAG_RDTUN, + &smsc_rx_packet_batching, 0, + "If set, allows packet batching to increase throughput and latency. " + "Else throughput and latency is decreased."); + #ifdef USB_DEBUG static int smsc_debug = 0; -SYSCTL_NODE(_hw_usb, OID_AUTO, smsc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, - "USB smsc"); SYSCTL_INT(_hw_usb_smsc, OID_AUTO, debug, CTLFLAG_RWTUN, &smsc_debug, 0, "Debug level"); #endif @@ -1377,7 +1385,9 @@ smsc_chip_init(struct smsc_softc *sc) * Burst capability is the number of URBs that can be in a burst of data/ * ethernet frames. */ - if (usbd_get_speed(sc->sc_ue.ue_udev) == USB_SPEED_HIGH) + if (!smsc_rx_packet_batching) + burst_cap = 0; + else if (usbd_get_speed(sc->sc_ue.ue_udev) == USB_SPEED_HIGH) burst_cap = 37; else burst_cap = 128; @@ -1404,7 +1414,8 @@ smsc_chip_init(struct smsc_softc *sc) /* The following setings are used for 'turbo mode', a.k.a multiple frames * per Rx transaction (again info taken form Linux driver). */ - reg_val |= (SMSC_HW_CFG_MEF | SMSC_HW_CFG_BCE); + if (smsc_rx_packet_batching) + reg_val |= (SMSC_HW_CFG_MEF | SMSC_HW_CFG_BCE); smsc_write_reg(sc, SMSC_HW_CFG, reg_val);