From patchwork Thu Dec 29 15:50:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 13083599 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFEDFC4167B for ; Thu, 29 Dec 2022 15:51:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233560AbiL2Pvo (ORCPT ); Thu, 29 Dec 2022 10:51:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233576AbiL2Puu (ORCPT ); Thu, 29 Dec 2022 10:50:50 -0500 Received: from mail-wm1-x32c.google.com (mail-wm1-x32c.google.com [IPv6:2a00:1450:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84371100B for ; Thu, 29 Dec 2022 07:50:45 -0800 (PST) Received: by mail-wm1-x32c.google.com with SMTP id b24-20020a05600c4a9800b003d21efdd61dso13451549wmp.3 for ; Thu, 29 Dec 2022 07:50:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=NwBCercycDWxENvRn7oc2eoBsxPaVeGT4GXBPNhdJ8g=; b=Jzvdpkw/XzdpFAkG+Z+tcJ4DUdRteMl63kgHVvLleVIbz2q6VSIsuZayKGtEVN0xp/ Ru551p224IYpbyFIMcdWCLKGhQih//bMO5DN+c6F/sL/dC7qYetI1p0NTiwdoi0hWN2p m0ZSJHghLw6YmhNw5aHDYrN7rkC/+bC18/Y8vjyBO40kXtykn9XJenjYYrIQHGBB5OPn 5VQS1P2lRNLd87W4KzSa7Gt5rTvsPzjwmjd8D1xX+t7sQCR1NINYMuT7EWl7jXHfS3/L 8UzfyHug9AiglBcNocuqmBOrcQw9jnrG90cR7yabT7kCSrRKkIahDirX9kRwfXyH6kTi ACoQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=NwBCercycDWxENvRn7oc2eoBsxPaVeGT4GXBPNhdJ8g=; b=ba0wc0bQDVd4DcZSCAXkdcOvBwpgJAlLjKGKt1RRMpa3OezhRSbc1byTGnZrJWGVcx 22Oh9sGa+aU482uWXJPKMfCgIhd3ncmiI9xta/ihRc3mlBbkZ6kL/dU441kRHdd6tXtG ChQSLDfOw/ahh7SQ6O94mgi+2Ky0P5jowWl3w8N8hcR8IUKPJGCtoSzhuOk6MphMFAnv g97kO/aLqnNnfyj9RUmgDpHQ0QgVRhxw71Y4O5CXxaHAdF+qThjNMA76gBlGDdvTk2IA Nlb3EW1zChEoYJGbzEM59Rb5wVjdOccPHYg/IDgvsGTHNNSs1VPuw7zCWWZut89HTE6l 2aDw== X-Gm-Message-State: AFqh2kqBaTzJqR1LR1OtO5mwJnjumkA1buQ3VIs84/6/zDYh9kVoB/qH PgzVCPg/SL32v/77X0HxAVju0Q== X-Google-Smtp-Source: AMrXdXvOC32xwrMXSpTwy25RHomedm9W00SV+mnmjOkX6+N08DbgALpCWo/PzROMAO42429U4u2CyQ== X-Received: by 2002:a05:600c:1d89:b0:3d3:5cd6:781 with SMTP id p9-20020a05600c1d8900b003d35cd60781mr20126386wms.37.1672329043665; Thu, 29 Dec 2022 07:50:43 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:8f7a:98d8:9d8d:ced8]) by smtp.gmail.com with ESMTPSA id bh12-20020a05600c3d0c00b003cfa81e2eb4sm25251647wmb.38.2022.12.29.07.50.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Dec 2022 07:50:43 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Greg Kroah-Hartman , Jiri Slaby , Srinivas Kandagatla , Vinod Koul , Alex Elder , =?utf-8?q?Ilp?= =?utf-8?q?o_J=C3=A4rvinen?= , Krzysztof Kozlowski Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v6 10/14] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_send_chunk_fifo() Date: Thu, 29 Dec 2022 16:50:26 +0100 Message-Id: <20221229155030.418800-11-brgl@bgdev.pl> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20221229155030.418800-1-brgl@bgdev.pl> References: <20221229155030.418800-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bartosz Golaszewski Shuffle the code a bit, drop unneeded variables, make types of others more consistent and use uart_xmit_advance() instead of handling tail->xmit manually. Signed-off-by: Bartosz Golaszewski --- drivers/tty/serial/qcom_geni_serial.c | 28 ++++++++++----------------- 1 file changed, 10 insertions(+), 18 deletions(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index bd91a6a5ad37..3705c0f893a4 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -93,7 +93,7 @@ #define IO_MACRO_IO2_IO3_SWAP 0x4640 /* We always configure 4 bytes per FIFO word */ -#define BYTES_PER_FIFO_WORD 4 +#define BYTES_PER_FIFO_WORD 4U struct qcom_geni_private_data { /* NOTE: earlycon port will have NULL here */ @@ -704,36 +704,28 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } -static int qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, - unsigned int chunk) +static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, + unsigned int chunk) { struct qcom_geni_serial_port *port = to_dev_port(uport); struct circ_buf *xmit = &uport->state->xmit; - size_t remaining = chunk; - int i, tail = xmit->tail; - - for (i = 0; i < chunk; ) { - unsigned int tx_bytes; - u8 buf[sizeof(u32)]; - int c; + unsigned int tx_bytes, c, remaining = chunk; + u8 buf[BYTES_PER_FIFO_WORD]; + while (remaining) { memset(buf, 0, sizeof(buf)); - tx_bytes = min_t(size_t, remaining, BYTES_PER_FIFO_WORD); + tx_bytes = min(remaining, BYTES_PER_FIFO_WORD); for (c = 0; c < tx_bytes ; c++) { - buf[c] = xmit->buf[tail++]; - tail &= UART_XMIT_SIZE - 1; + buf[c] = xmit->buf[xmit->tail]; + uart_xmit_advance(uport, 1); } iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1); - i += tx_bytes; - uport->icount.tx += tx_bytes; remaining -= tx_bytes; port->tx_remaining -= tx_bytes; } - - return tail; } static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, @@ -778,7 +770,7 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, uport->membase + SE_GENI_M_IRQ_EN); } - xmit->tail = qcom_geni_serial_send_chunk_fifo(uport, chunk); + qcom_geni_serial_send_chunk_fifo(uport, chunk); /* * The tx fifo watermark is level triggered and latched. Though we had