From patchwork Thu May 2 18:27:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Fritz X-Patchwork-Id: 794322 Received: from fritzc.com (mail.fritzc.com [213.160.72.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D509317167B; Thu, 2 May 2024 18:29:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.160.72.247 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714674546; cv=none; b=rOPgpovkcZ75ibkDQEL5XV+QOg2WoTqbTt6tEVRpXJvHUe9chgqfR7B+1hq61KHAbuDA5wALlXgZRZ5/fQMqqv4Q/B/rOBbegocuqpbBlbMZlOu5dhi1VYzzRdI0sUFFTpJxKUPHUlesPkq0xuz0GqF1p/81lncXJdWqp6mFBHg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714674546; c=relaxed/simple; bh=ZrFdSLcIMeL0Gw5YEaKUCGUEp/+XyImajt9Wq1/xfjE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=RdPFbPpzToMH2+KSzQ5adpx9CGzMcbD2YSoj7VNRMgjk7w9GocBlLEH2z4ykMm/5S5iXI3XIEFkImOP2YhRJkvl1wuXIbF5tbzBOk/lt4GOlWfthFCuwPowyVSCy9PJEk3gQWWoW0vlvOzrcXLb7oOIBJXaUJDSaBBdvovtBWtA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=hexdev.de; spf=pass smtp.mailfrom=hexdev.de; dkim=pass (1024-bit key) header.d=fritzc.com header.i=@fritzc.com header.b=jfJxtVeq; arc=none smtp.client-ip=213.160.72.247 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=hexdev.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=hexdev.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=fritzc.com header.i=@fritzc.com header.b="jfJxtVeq" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=fritzc.com; s=dkim; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=ekCjuw1duvOWVggYCKKNCs0aIF99UZrHoS1CtHiTWfg=; b=jfJxtVeq2SxD+2lNekY07f9QAL ylvXuVNQyvjAv3l5js0UkficH9FdjxeOewdgah5EzToiwFITNg26HkOCjwVmya6gnZqXGTAfBc06p x2Njvb3nY/Bu198yrn+ghg8xudC/Hwra9koDVhfwEuD86YrjVmalUFOFVthLasmRK9ts=; Received: from 127.0.0.1 by fritzc.com with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim latest) (envelope-from ) id 1s2bAu-001ZbZ-1h; Thu, 02 May 2024 20:28:57 +0200 From: Christoph Fritz To: Jiri Slaby , Oliver Hartkopp , Marc Kleine-Budde , Vincent Mailhol , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jiri Kosina , Benjamin Tissoires , Greg Kroah-Hartman , Sebastian Reichel , Linus Walleij Cc: Andreas Lauser , Jonathan Corbet , Pavel Pisa , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v3 03/11] tty: serdev: Add flag buffer aware receive_buf_fp() Date: Thu, 2 May 2024 20:27:56 +0200 Message-Id: <20240502182804.145926-4-christoph.fritz@hexdev.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240502182804.145926-1-christoph.fritz@hexdev.de> References: <20240502182804.145926-1-christoph.fritz@hexdev.de> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This patch introduces an additional receive buffer callback variation besides the already existing receive_buf(). This new callback function also passes the flag buffer (TTY_NORMAL, TTY_BREAK, and friends). If defined, this function gets prioritized and called instead of the standard receive_buf(). An alternative approach could have been to enhance the receive_buf() function and update all drivers that use it. Signed-off-by: Christoph Fritz --- drivers/tty/serdev/serdev-ttyport.c | 2 +- include/linux/serdev.h | 17 ++++++++++++++--- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c index 3d7ae7fa50186..bb47691afdb21 100644 --- a/drivers/tty/serdev/serdev-ttyport.c +++ b/drivers/tty/serdev/serdev-ttyport.c @@ -32,7 +32,7 @@ static size_t ttyport_receive_buf(struct tty_port *port, const u8 *cp, if (!test_bit(SERPORT_ACTIVE, &serport->flags)) return 0; - ret = serdev_controller_receive_buf(ctrl, cp, count); + ret = serdev_controller_receive_buf(ctrl, cp, fp, count); dev_WARN_ONCE(&ctrl->dev, ret > count, "receive_buf returns %zu (count = %zu)\n", diff --git a/include/linux/serdev.h b/include/linux/serdev.h index ff78efc1f60df..c6ef5a8988e07 100644 --- a/include/linux/serdev.h +++ b/include/linux/serdev.h @@ -23,11 +23,17 @@ struct serdev_device; * struct serdev_device_ops - Callback operations for a serdev device * @receive_buf: Function called with data received from device; * returns number of bytes accepted; may sleep. + * @receive_buf_fp: Function called with data and flag buffer received + * from device; If defined, this function gets called + * instead of @receive_buf; + * returns number of bytes accepted; may sleep. * @write_wakeup: Function called when ready to transmit more data; must * not sleep. */ struct serdev_device_ops { size_t (*receive_buf)(struct serdev_device *, const u8 *, size_t); + ssize_t (*receive_buf_fp)(struct serdev_device *, const u8 *, + const u8 *, size_t); void (*write_wakeup)(struct serdev_device *); }; @@ -186,15 +192,20 @@ static inline void serdev_controller_write_wakeup(struct serdev_controller *ctrl } static inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl, - const u8 *data, + const u8 *data, const u8 *fp, size_t count) { struct serdev_device *serdev = ctrl->serdev; - if (!serdev || !serdev->ops->receive_buf) + if (!serdev || !serdev->ops) return 0; - return serdev->ops->receive_buf(serdev, data, count); + if (serdev->ops->receive_buf_fp) + return serdev->ops->receive_buf_fp(serdev, data, fp, count); + else if (serdev->ops->receive_buf) + return serdev->ops->receive_buf(serdev, data, count); + + return 0; } #if IS_ENABLED(CONFIG_SERIAL_DEV_BUS)