From owner-svn-src-all@FreeBSD.ORG Mon Aug 23 18:51:31 2010 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B590D10656A4; Mon, 23 Aug 2010 18:51:31 +0000 (UTC) (envelope-from yongari@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 8AC238FC18; Mon, 23 Aug 2010 18:51:31 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o7NIpVla049570; Mon, 23 Aug 2010 18:51:31 GMT (envelope-from yongari@svn.freebsd.org) Received: (from yongari@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id o7NIpVeW049568; Mon, 23 Aug 2010 18:51:31 GMT (envelope-from yongari@svn.freebsd.org) Message-Id: <201008231851.o7NIpVeW049568@svn.freebsd.org> From: Pyun YongHyeon Date: Mon, 23 Aug 2010 18:51:31 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r211716 - head/sys/dev/xl X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 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: Mon, 23 Aug 2010 18:51:31 -0000 Author: yongari Date: Mon Aug 23 18:51:31 2010 New Revision: 211716 URL: http://svn.freebsd.org/changeset/base/211716 Log: Move xl_reset() to xl_init_locked(). This will make driver initialize controller from a known good state. Previously driver used to issue controller reset while TX/RX DMA are in progress. I guess resetting controller in active TX/RX DMA cycle is to ensure stopping I/Os in xl_shutdown(). I remember some buggy controllers didn't respond with stop command if controller is under high network load at the time of shutdown so resetting controller was the only safe way to stop the I/Os. However, from my experiments, controller always responded with stop command under high network load so I think it's okay to remove the xl_reset() in device_shutdown handler. Resetting controller also will clear configured RX filter which in turn will make WOL support hard because driver have to reprogram RX filter in WOL handler as well as setting station address. Modified: head/sys/dev/xl/if_xl.c Modified: head/sys/dev/xl/if_xl.c ============================================================================== --- head/sys/dev/xl/if_xl.c Mon Aug 23 18:21:40 2010 (r211715) +++ head/sys/dev/xl/if_xl.c Mon Aug 23 18:51:31 2010 (r211716) @@ -1635,7 +1635,6 @@ xl_detach(device_t dev) /* These should only be active if attach succeeded */ if (device_is_attached(dev)) { XL_LOCK(sc); - xl_reset(sc); xl_stop(sc); XL_UNLOCK(sc); taskqueue_drain(taskqueue_swi, &sc->xl_task); @@ -2246,7 +2245,6 @@ xl_intr(void *arg) } if (status & XL_STAT_ADFAIL) { - xl_reset(sc); ifp->if_drv_flags &= ~IFF_DRV_RUNNING; xl_init_locked(sc); } @@ -2318,7 +2316,6 @@ xl_poll_locked(struct ifnet *ifp, enum p } if (status & XL_STAT_ADFAIL) { - xl_reset(sc); ifp->if_drv_flags &= ~IFF_DRV_RUNNING; xl_init_locked(sc); } @@ -2754,6 +2751,9 @@ xl_init_locked(struct xl_softc *sc) */ xl_stop(sc); + /* Reset the chip to a known state. */ + xl_reset(sc); + if (sc->xl_miibus == NULL) { CSR_WRITE_2(sc, XL_COMMAND, XL_CMD_RX_RESET); xl_wait(sc); @@ -3236,7 +3236,6 @@ xl_watchdog(struct xl_softc *sc) device_printf(sc->xl_dev, "no carrier - transceiver cable problem?\n"); - xl_reset(sc); ifp->if_drv_flags &= ~IFF_DRV_RUNNING; xl_init_locked(sc); @@ -3335,7 +3334,6 @@ xl_shutdown(device_t dev) sc = device_get_softc(dev); XL_LOCK(sc); - xl_reset(sc); xl_stop(sc); XL_UNLOCK(sc); @@ -3367,7 +3365,6 @@ xl_resume(device_t dev) XL_LOCK(sc); - xl_reset(sc); if (ifp->if_flags & IFF_UP) { ifp->if_drv_flags &= ~IFF_DRV_RUNNING; xl_init_locked(sc);