From owner-svn-src-all@freebsd.org Wed Jan 17 08:01:52 2018 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 48635EB4682; Wed, 17 Jan 2018 08:01:52 +0000 (UTC) (envelope-from wma@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 24DFE82517; Wed, 17 Jan 2018 08:01:52 +0000 (UTC) (envelope-from wma@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 53D774C17; Wed, 17 Jan 2018 08:01:51 +0000 (UTC) (envelope-from wma@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w0H81pIJ044094; Wed, 17 Jan 2018 08:01:51 GMT (envelope-from wma@FreeBSD.org) Received: (from wma@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w0H81pJR044093; Wed, 17 Jan 2018 08:01:51 GMT (envelope-from wma@FreeBSD.org) Message-Id: <201801170801.w0H81pJR044093@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: wma set sender to wma@FreeBSD.org using -f From: Wojciech Macek Date: Wed, 17 Jan 2018 08:01:51 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r328077 - head/sys/powerpc/powernv X-SVN-Group: head X-SVN-Commit-Author: wma X-SVN-Commit-Paths: head/sys/powerpc/powernv X-SVN-Commit-Revision: 328077 X-SVN-Commit-Repository: base 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: 2.1.25 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, 17 Jan 2018 08:01:52 -0000 Author: wma Date: Wed Jan 17 08:01:51 2018 New Revision: 328077 URL: https://svnweb.freebsd.org/changeset/base/328077 Log: PowerNV: workaround console on OPAL 5.4 FreeBSD prints text char-by-char, which is not what OPAL is designed to. Poll events more frequently to avoid buffer overflow and loosing data. Created by: Wojciech Macek Obtained from: Semihalf Sponsored by: QCM Technologies Modified: head/sys/powerpc/powernv/opal_console.c Modified: head/sys/powerpc/powernv/opal_console.c ============================================================================== --- head/sys/powerpc/powernv/opal_console.c Wed Jan 17 07:39:11 2018 (r328076) +++ head/sys/powerpc/powernv/opal_console.c Wed Jan 17 08:01:51 2018 (r328077) @@ -435,11 +435,15 @@ uart_opal_cngetc(struct consdev *cp) static void uart_opal_cnputc(struct consdev *cp, int c) { - static uint64_t events; unsigned char ch = c; + int a; - if (cold) - opal_call(OPAL_POLL_EVENTS, &events); /* Clear FIFO if needed */ + if (1) { + /* Clear FIFO if needed. Must be repeated few times. */ + for (a = 0; a < 20; a++) { + opal_call(OPAL_POLL_EVENTS, NULL); + } + } uart_opal_put(console_sc, &ch, 1); } @@ -461,7 +465,7 @@ uart_opal_ttyoutwakeup(struct tty *tp) int len; sc = tty_softc(tp); - + while ((len = ttydisc_getc(tp, buffer, sizeof(buffer))) != 0) uart_opal_put(sc, buffer, len); } @@ -479,6 +483,8 @@ uart_opal_intr(void *v) ttydisc_rint(tp, c, 0); ttydisc_rint_done(tp); tty_unlock(tp); + + opal_call(OPAL_POLL_EVENTS, NULL); if (sc->irqres == NULL) callout_reset(&sc->callout, sc->polltime, uart_opal_intr, sc);