From owner-svn-src-head@freebsd.org Sun Nov 3 21:03:55 2019 Return-Path: Delivered-To: svn-src-head@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 B40261A2CE3; Sun, 3 Nov 2019 21:03:55 +0000 (UTC) (envelope-from wulf@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 475pLz4DmJz3xMH; Sun, 3 Nov 2019 21:03:55 +0000 (UTC) (envelope-from wulf@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 75D5319B82; Sun, 3 Nov 2019 21:03:55 +0000 (UTC) (envelope-from wulf@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id xA3L3td5071823; Sun, 3 Nov 2019 21:03:55 GMT (envelope-from wulf@FreeBSD.org) Received: (from wulf@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id xA3L3t0H071822; Sun, 3 Nov 2019 21:03:55 GMT (envelope-from wulf@FreeBSD.org) Message-Id: <201911032103.xA3L3t0H071822@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: wulf set sender to wulf@FreeBSD.org using -f From: Vladimir Kondratyev Date: Sun, 3 Nov 2019 21:03:55 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r354311 - head/sys/dev/ichiic X-SVN-Group: head X-SVN-Commit-Author: wulf X-SVN-Commit-Paths: head/sys/dev/ichiic X-SVN-Commit-Revision: 354311 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Nov 2019 21:03:55 -0000 Author: wulf Date: Sun Nov 3 21:03:55 2019 New Revision: 354311 URL: https://svnweb.freebsd.org/changeset/base/354311 Log: [ig4] Convert last remaining usage of TX_NOTFULL status to TX_EMPTY in ig4iic_read routine. It makes possible interrupt utilization while waiting for empty space in TX FIFO. Modified: head/sys/dev/ichiic/ig4_iic.c Modified: head/sys/dev/ichiic/ig4_iic.c ============================================================================== --- head/sys/dev/ichiic/ig4_iic.c Sun Nov 3 21:03:07 2019 (r354310) +++ head/sys/dev/ichiic/ig4_iic.c Sun Nov 3 21:03:55 2019 (r354311) @@ -337,14 +337,14 @@ ig4iic_read(ig4iic_softc_t *sc, uint8_t *buf, uint16_t while (received < len) { burst = sc->cfg.txfifo_depth - (reg_read(sc, IG4_REG_TXFLR) & IG4_FIFOLVL_MASK); - /* Ensure we have enough free space in RXFIFO */ - burst = MIN(burst, sc->cfg.rxfifo_depth - lowat); if (burst <= 0) { - error = wait_status(sc, IG4_STATUS_TX_NOTFULL); + error = wait_status(sc, IG4_STATUS_TX_EMPTY); if (error) break; - burst = 1; + burst = sc->cfg.txfifo_depth; } + /* Ensure we have enough free space in RXFIFO */ + burst = MIN(burst, sc->cfg.rxfifo_depth - lowat); target = MIN(requested + burst, (int)len); while (requested < target) { cmd = IG4_DATA_COMMAND_RD;