From owner-svn-src-all@FreeBSD.ORG Wed Mar 25 12:57:44 2015 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8E845FB; Wed, 25 Mar 2015 12:57:44 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 76F74D1B; Wed, 25 Mar 2015 12:57:44 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t2PCvihj058791; Wed, 25 Mar 2015 12:57:44 GMT (envelope-from arybchik@FreeBSD.org) Received: (from arybchik@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t2PCvinQ058790; Wed, 25 Mar 2015 12:57:44 GMT (envelope-from arybchik@FreeBSD.org) Message-Id: <201503251257.t2PCvinQ058790@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: arybchik set sender to arybchik@FreeBSD.org using -f From: Andrew Rybchenko Date: Wed, 25 Mar 2015 12:57:44 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r280575 - stable/10/sys/dev/sfxge X-SVN-Group: stable-10 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Mar 2015 12:57:44 -0000 Author: arybchik Date: Wed Mar 25 12:57:43 2015 New Revision: 280575 URL: https://svnweb.freebsd.org/changeset/base/280575 Log: MFC: 279147 sfxge: TxQ block level should use EFX_TXQ_LIMIT as maximum TxQ size Sponsored by: Solarflare Communications, Inc. Approved by: gnn (mentor) Modified: stable/10/sys/dev/sfxge/sfxge_tx.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/sfxge/sfxge_tx.c ============================================================================== --- stable/10/sys/dev/sfxge/sfxge_tx.c Wed Mar 25 12:46:19 2015 (r280574) +++ stable/10/sys/dev/sfxge/sfxge_tx.c Wed Mar 25 12:57:43 2015 (r280575) @@ -67,16 +67,22 @@ __FBSDID("$FreeBSD$"); #include "sfxge.h" #include "sfxge_tx.h" -/* Set the block level to ensure there is space to generate a - * large number of descriptors for TSO. With minimum MSS and - * maximum mbuf length we might need more than a ring-ful of - * descriptors, but this should not happen in practice except - * due to deliberate attack. In that case we will truncate - * the output at a packet boundary. +/* + * Estimate maximum number of Tx descriptors required for TSO packet. + * With minimum MSS and maximum mbuf length we might need more (even + * than a ring-ful of descriptors), but this should not happen in + * practice except due to deliberate attack. In that case we will + * truncate the output at a packet boundary. */ #define SFXGE_TSO_MAX_DESC \ (SFXGE_TSO_MAX_SEGS * 2 + SFXGE_TX_MAPPING_MAX_SEG - 1) -#define SFXGE_TXQ_BLOCK_LEVEL(_entries) ((_entries) - SFXGE_TSO_MAX_DESC) + +/* + * Set the block level to ensure there is space to generate a + * large number of descriptors for TSO. + */ +#define SFXGE_TXQ_BLOCK_LEVEL(_entries) \ + (EFX_TXQ_LIMIT(_entries) - SFXGE_TSO_MAX_DESC) #ifdef SFXGE_HAVE_MQ