From patchwork Fri Nov 18 12:25:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 13048190 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 F0319C43217 for ; Fri, 18 Nov 2022 12:27:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241750AbiKRM1O (ORCPT ); Fri, 18 Nov 2022 07:27:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37296 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241873AbiKRM0q (ORCPT ); Fri, 18 Nov 2022 07:26:46 -0500 Received: from mail-wm1-x332.google.com (mail-wm1-x332.google.com [IPv6:2a00:1450:4864:20::332]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1A9799AC95 for ; Fri, 18 Nov 2022 04:26:17 -0800 (PST) Received: by mail-wm1-x332.google.com with SMTP id l39-20020a05600c1d2700b003cf93c8156dso3910993wms.4 for ; Fri, 18 Nov 2022 04:26:17 -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=1orAtl1REjTAzqj2djLLnWo1y+H+0MlMU6NANawZJ1g=; b=eIwEM+xYrWlEW5eEK2bF4g6HOnVDA99M2iQTRSGU2AenkQzfcXr4HNSbPZhbfoldv3 Cg6nmeWe1/ni5+JAuHzEMfRa5Xnhrpo86fJlu0U4iIk3dx1e6slTqpfsmEgLv2hUZyZl 199bs9WC/fWK4jf+oZH6NMZVA6kVzMzAMhZvcJ9mLigtMMTNO40zbecX7PAfeeqDezRT ZyejbcwYgas/DE6WUbJ/HNooN/GtnPMGtjocwE4CBDuw95CvNXlbtcQXMkEZWLI0DVD7 3o7eyq2LggIFasM74yXHev8L9Xq5LFoOovlWxv6Howc0jHveHQA0ZUBDFR1y2JuK4/LX oWPg== 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=1orAtl1REjTAzqj2djLLnWo1y+H+0MlMU6NANawZJ1g=; b=FUaUdQPfawFaIOEpx4Wv65YwetMHPPjgzeiF51iCFKKYyZ668wd5ODTrVuIo33rGRd 3wn9TYZ/C0KPOc+BodWs/WmFnXDNlUlNU7YKcLxDUiFNhRzP1zYzaAtFrQPXUk1sRZ8u dDtK/mBhs4slgNKBZyBhvLAqynSjCYDbauCFpCuw/n4K6eNvg8/r3RwgOpz1M1fmeqmJ nkcjphx4cvOf7tbsZqyZNb/wmAVraPo39wiA+ShXS9+CtwYOUvUA1VL+7JdrSufFcHv8 qOZEIk/dqUu5AVCkOrIGhhpPWfmzyzhmCQr9aLsYQYKa//uVjgkK5XxewgeHHCcJ2JnU lDyg== X-Gm-Message-State: ANoB5pm/tzg8sOMTFPwP4xyVmOKzcz/Pbkn5hm125IJTitpMe2mSnyCw KknEl5+NoBf35hKTfJoQjqEMzQ== X-Google-Smtp-Source: AA0mqf6n+HWO2kDDrcQLiXsZ3/RVVnEHQLszeAbmrsVumChy3W7Vq034xAxO9C4FXFz7dUtOqSccnA== X-Received: by 2002:a05:600c:1e1a:b0:3cf:7959:d8be with SMTP id ay26-20020a05600c1e1a00b003cf7959d8bemr5005668wmb.85.1668774376541; Fri, 18 Nov 2022 04:26:16 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:b10c:1279:a704:75d4]) by smtp.gmail.com with ESMTPSA id f19-20020a05600c155300b003c6f3e5ba42sm9873958wmg.46.2022.11.18.04.26.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Nov 2022 04:26:16 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Greg Kroah-Hartman , Jiri Slaby , Srinivas Kandagatla , Vinod Koul , Alex Elder Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH 15/15] tty: serial: qcom-geni-serial: add support for serial engine DMA Date: Fri, 18 Nov 2022 13:25:39 +0100 Message-Id: <20221118122539.384993-16-brgl@bgdev.pl> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20221118122539.384993-1-brgl@bgdev.pl> References: <20221118122539.384993-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bartosz Golaszewski The qcom-geni-serial driver currently only works in SE FIFO mode. This limits the UART speed to around 180 kB/s. In order to achieve higher speeds we need to use SE DMA mode. Keep the console port working in FIFO mode but extend the code to use DMA for the high-speed port. Signed-off-by: Bartosz Golaszewski --- drivers/tty/serial/qcom_geni_serial.c | 288 ++++++++++++++++++++++---- 1 file changed, 246 insertions(+), 42 deletions(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index cdd476d504da..700e20860af0 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -70,6 +70,8 @@ #define UART_START_TX 0x1 /* UART S_CMD OP codes */ #define UART_START_READ 0x1 +#define UART_PARAM 0x1 +#define UART_PARAM_RFR_OPEN BIT(7) #define UART_OVERSAMPLING 32 #define STALE_TIMEOUT 16 @@ -95,9 +97,11 @@ /* We always configure 4 bytes per FIFO word */ #define BYTES_PER_FIFO_WORD 4 +#define DMA_RX_BUF_SIZE 2048 + struct qcom_geni_device_data { bool console; - void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop); + enum geni_se_xfer_mode mode; }; struct qcom_geni_private_data { @@ -118,9 +122,11 @@ struct qcom_geni_serial_port { u32 tx_fifo_depth; u32 tx_fifo_width; u32 rx_fifo_depth; + dma_addr_t tx_dma_addr; + dma_addr_t rx_dma_addr; bool setup; unsigned int baud; - void *rx_fifo; + void *rx_buf; u32 loopback; bool brk; @@ -549,18 +555,11 @@ static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) static void handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) { - struct tty_port *tport; struct qcom_geni_serial_port *port = to_dev_port(uport); - u32 num_bytes_pw = port->tx_fifo_width / BITS_PER_BYTE; - u32 words = ALIGN(bytes, num_bytes_pw) / num_bytes_pw; + struct tty_port *tport = &uport->state->port; int ret; - tport = &uport->state->port; - ioread32_rep(uport->membase + SE_GENI_RX_FIFOn, port->rx_fifo, words); - if (drop) - return; - - ret = tty_insert_flip_string(tport, port->rx_fifo, bytes); + ret = tty_insert_flip_string(tport, port->rx_buf, bytes); if (ret != bytes) { dev_err(uport->dev, "%s:Unable to push data ret %d_bytes %d\n", __func__, ret, bytes); @@ -575,7 +574,69 @@ static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport) return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS); } -static void qcom_geni_serial_start_tx(struct uart_port *uport) +static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + bool done; + u32 status; + u32 m_irq_en; + + status = readl(uport->membase + SE_GENI_STATUS); + if (!(status & M_GENI_CMD_ACTIVE)) + return; + + if (port->rx_dma_addr) { + geni_se_tx_dma_unprep(&port->se, port->tx_dma_addr, + port->tx_remaining); + port->tx_dma_addr = (dma_addr_t)NULL; + port->tx_remaining = 0; + } + + m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); + writel(m_irq_en, uport->membase + SE_GENI_M_IRQ_EN); + geni_se_cancel_m_cmd(&port->se); + + done = qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS, + S_CMD_CANCEL_EN, true); + if (!done) { + geni_se_abort_m_cmd(&port->se); + qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS, + M_CMD_ABORT_EN, true); + writel(M_CMD_ABORT_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); + } + writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); +} + +static void qcom_geni_serial_start_tx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + struct circ_buf *xmit = &uport->state->xmit; + unsigned int xmit_size; + int ret; + + if (port->tx_dma_addr) + return; + + xmit_size = uart_circ_chars_pending(xmit); + if (xmit_size < WAKEUP_CHARS) + uart_write_wakeup(uport); + + xmit_size = min_t(unsigned int, xmit_size, UART_XMIT_SIZE - xmit->tail); + + qcom_geni_serial_setup_tx(uport, xmit_size); + + ret = geni_se_tx_dma_prep(&port->se, &xmit->buf[xmit->tail], + xmit_size, &port->tx_dma_addr); + if (ret) { + dev_err(uport->dev, "unable to start TX SE DMA: %d\n", ret); + qcom_geni_serial_stop_tx_dma(uport); + return; + } + + port->tx_remaining = xmit_size; +} + +static void qcom_geni_serial_start_tx_fifo(struct uart_port *uport) { u32 irq_en; u32 status; @@ -594,7 +655,7 @@ static void qcom_geni_serial_start_tx(struct uart_port *uport) writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } -static void qcom_geni_serial_stop_tx(struct uart_port *uport) +static void qcom_geni_serial_stop_tx_fifo(struct uart_port *uport) { u32 irq_en; u32 status; @@ -620,14 +681,13 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport) writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); } -static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) +static void qcom_geni_serial_handle_rx_fifo(struct uart_port *uport, bool drop) { u32 status; u32 word_cnt; u32 last_word_byte_cnt; u32 last_word_partial; u32 total_bytes; - struct qcom_geni_serial_port *port = to_dev_port(uport); status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS); word_cnt = status & RX_FIFO_WC_MSK; @@ -642,10 +702,10 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) total_bytes += last_word_byte_cnt; else total_bytes += BYTES_PER_FIFO_WORD; - port->dev_data->handle_rx(uport, total_bytes, drop); + handle_rx_console(uport, total_bytes, drop); } -static void qcom_geni_serial_stop_rx(struct uart_port *uport) +static void qcom_geni_serial_stop_rx_fifo(struct uart_port *uport) { u32 irq_en; u32 status; @@ -675,7 +735,7 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport) s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS); /* Flush the Rx buffer */ if (s_irq_status & S_RX_FIFO_LAST_EN) - qcom_geni_serial_handle_rx(uport, true); + qcom_geni_serial_handle_rx_fifo(uport, true); writel(s_irq_status, uport->membase + SE_GENI_S_IRQ_CLEAR); status = readl(uport->membase + SE_GENI_STATUS); @@ -683,7 +743,7 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport) qcom_geni_serial_abort_rx(uport); } -static void qcom_geni_serial_start_rx(struct uart_port *uport) +static void qcom_geni_serial_start_rx_fifo(struct uart_port *uport) { u32 irq_en; u32 status; @@ -691,7 +751,7 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) status = readl(uport->membase + SE_GENI_STATUS); if (status & S_GENI_CMD_ACTIVE) - qcom_geni_serial_stop_rx(uport); + qcom_geni_serial_stop_rx_fifo(uport); geni_se_setup_s_cmd(&port->se, UART_START_READ, 0); @@ -704,6 +764,101 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } +static void qcom_geni_serial_stop_rx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + u32 status; + + status = readl(uport->membase + SE_GENI_STATUS); + if (!(status & S_GENI_CMD_ACTIVE)) + return; + + geni_se_cancel_s_cmd(&port->se); + qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS, + S_CMD_CANCEL_EN, true); + + status = readl(uport->membase + SE_GENI_STATUS); + if (status & S_GENI_CMD_ACTIVE) + qcom_geni_serial_abort_rx(uport); + + if (port->rx_dma_addr) { + geni_se_rx_dma_unprep(&port->se, port->rx_dma_addr, + DMA_RX_BUF_SIZE); + port->rx_dma_addr = (dma_addr_t)NULL; + } +} + +static void qcom_geni_serial_start_rx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + u32 status; + int ret; + + status = readl(uport->membase + SE_GENI_STATUS); + if (status & S_GENI_CMD_ACTIVE) + qcom_geni_serial_stop_rx_dma(uport); + + geni_se_setup_s_cmd(&port->se, UART_START_READ, UART_PARAM_RFR_OPEN); + + ret = geni_se_rx_dma_prep(&port->se, port->rx_buf, + DMA_RX_BUF_SIZE, + &port->rx_dma_addr); + if (ret) { + dev_err(uport->dev, "unable to start RX SE DMA: %d\n", ret); + qcom_geni_serial_stop_rx_dma(uport); + } +} + +static void qcom_geni_serial_handle_rx_dma(struct uart_port *uport, bool drop) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + u32 status; + u32 rx_in; + int ret; + + status = readl(uport->membase + SE_GENI_STATUS); + if (!(status & S_GENI_CMD_ACTIVE)) + return; + + if (!port->rx_dma_addr) + return; + + geni_se_rx_dma_unprep(&port->se, port->rx_dma_addr, DMA_RX_BUF_SIZE); + port->rx_dma_addr = (dma_addr_t)NULL; + + rx_in = readl(uport->membase + SE_DMA_RX_LEN_IN); + if (!rx_in) { + dev_warn(uport->dev, "serial engine reports 0 RX bytes in!\n"); + return; + } + + if (!drop) + handle_rx_uart(uport, rx_in, drop); + + ret = geni_se_rx_dma_prep(&port->se, port->rx_buf, + DMA_RX_BUF_SIZE, + &port->rx_dma_addr); + if (ret) { + dev_err(uport->dev, "unable to start RX SE DMA: %d\n", ret); + qcom_geni_serial_stop_rx_dma(uport); + } +} + +static void qcom_geni_serial_start_rx(struct uart_port *uport) +{ + uport->ops->start_rx(uport); +} + +static void qcom_geni_serial_stop_rx(struct uart_port *uport) +{ + uport->ops->stop_rx(uport); +} + +static void qcom_geni_serial_stop_tx(struct uart_port *uport) +{ + uport->ops->stop_tx(uport); +} + static int qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, unsigned int chunk) { @@ -736,8 +891,8 @@ static int qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, return tail; } -static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, - bool active) +static void qcom_geni_serial_handle_tx_fifo(struct uart_port *uport, + bool done, bool active) { struct qcom_geni_serial_port *port = to_dev_port(uport); struct circ_buf *xmit = &uport->state->xmit; @@ -757,7 +912,7 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, /* All data has been transmitted and acknowledged as received */ if (!pending && !status && done) { - qcom_geni_serial_stop_tx(uport); + qcom_geni_serial_stop_tx_fifo(uport); goto out_write_wakeup; } @@ -800,12 +955,32 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, uart_write_wakeup(uport); } +static void qcom_geni_serial_handle_tx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + struct circ_buf *xmit = &uport->state->xmit; + + xmit->tail = (xmit->tail + port->tx_remaining) & (UART_XMIT_SIZE - 1); + geni_se_tx_dma_unprep(&port->se, port->tx_dma_addr, port->tx_remaining); + uport->icount.tx += port->tx_remaining; + port->tx_dma_addr = (dma_addr_t)NULL; + port->tx_remaining = 0; + + if (!uart_circ_empty(xmit)) + qcom_geni_serial_start_tx_dma(uport); + else + uart_write_wakeup(uport); +} + static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) { u32 m_irq_en; u32 m_irq_status; u32 s_irq_status; u32 geni_status; + u32 dma; + u32 dma_tx_status; + u32 dma_rx_status; struct uart_port *uport = dev; bool drop_rx = false; struct tty_port *tport = &uport->state->port; @@ -818,10 +993,15 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) m_irq_status = readl(uport->membase + SE_GENI_M_IRQ_STATUS); s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS); + dma_tx_status = readl(uport->membase + SE_DMA_TX_IRQ_STAT); + dma_rx_status = readl(uport->membase + SE_DMA_RX_IRQ_STAT); geni_status = readl(uport->membase + SE_GENI_STATUS); + dma = readl(uport->membase + SE_GENI_DMA_MODE_EN); m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); writel(m_irq_status, uport->membase + SE_GENI_M_IRQ_CLEAR); writel(s_irq_status, uport->membase + SE_GENI_S_IRQ_CLEAR); + writel(dma_tx_status, uport->membase + SE_DMA_TX_IRQ_CLR); + writel(dma_rx_status, uport->membase + SE_DMA_RX_IRQ_CLR); if (WARN_ON(m_irq_status & M_ILLEGAL_CMD_EN)) goto out_unlock; @@ -831,10 +1011,6 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) tty_insert_flip_char(tport, 0, TTY_OVERRUN); } - if (m_irq_status & m_irq_en & (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN)) - qcom_geni_serial_handle_tx(uport, m_irq_status & M_CMD_DONE_EN, - geni_status & M_GENI_CMD_ACTIVE); - if (s_irq_status & (S_GP_IRQ_0_EN | S_GP_IRQ_1_EN)) { if (s_irq_status & S_GP_IRQ_0_EN) uport->icount.parity++; @@ -844,8 +1020,35 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) port->brk = true; } - if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN)) - qcom_geni_serial_handle_rx(uport, drop_rx); + if (dma) { + if (dma_tx_status & TX_DMA_DONE) + qcom_geni_serial_handle_tx_dma(uport); + + if (dma_rx_status) { + if (dma_rx_status & RX_RESET_DONE) + goto out_unlock; + + if (dma_rx_status & RX_DMA_PARITY_ERR) { + uport->icount.parity++; + drop_rx = true; + } + + if (dma_rx_status & RX_DMA_BREAK) + uport->icount.brk++; + + if (dma_rx_status & (RX_DMA_DONE | RX_EOT)) + qcom_geni_serial_handle_rx_dma(uport, drop_rx); + } + } else { + if (m_irq_status & m_irq_en & + (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN)) + qcom_geni_serial_handle_tx_fifo(uport, + m_irq_status & M_CMD_DONE_EN, + geni_status & M_GENI_CMD_ACTIVE); + + if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN)) + qcom_geni_serial_handle_rx_fifo(uport, drop_rx); + } out_unlock: uart_unlock_and_check_sysrq(uport); @@ -915,7 +1118,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport) geni_se_config_packing(&port->se, BITS_PER_BYTE, BYTES_PER_FIFO_WORD, false, true, true); geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2); - geni_se_select_mode(&port->se, GENI_SE_FIFO); + geni_se_select_mode(&port->se, port->dev_data->mode); port->setup = true; return 0; @@ -1313,10 +1516,10 @@ static void qcom_geni_serial_pm(struct uart_port *uport, static const struct uart_ops qcom_geni_console_pops = { .tx_empty = qcom_geni_serial_tx_empty, - .stop_tx = qcom_geni_serial_stop_tx, - .start_tx = qcom_geni_serial_start_tx, - .stop_rx = qcom_geni_serial_stop_rx, - .start_rx = qcom_geni_serial_start_rx, + .stop_tx = qcom_geni_serial_stop_tx_fifo, + .start_tx = qcom_geni_serial_start_tx_fifo, + .stop_rx = qcom_geni_serial_stop_rx_fifo, + .start_rx = qcom_geni_serial_start_rx_fifo, .set_termios = qcom_geni_serial_set_termios, .startup = qcom_geni_serial_startup, .request_port = qcom_geni_serial_request_port, @@ -1334,9 +1537,10 @@ static const struct uart_ops qcom_geni_console_pops = { static const struct uart_ops qcom_geni_uart_pops = { .tx_empty = qcom_geni_serial_tx_empty, - .stop_tx = qcom_geni_serial_stop_tx, - .start_tx = qcom_geni_serial_start_tx, - .stop_rx = qcom_geni_serial_stop_rx, + .stop_tx = qcom_geni_serial_stop_tx_dma, + .start_tx = qcom_geni_serial_start_tx_dma, + .start_rx = qcom_geni_serial_start_rx_dma, + .stop_rx = qcom_geni_serial_stop_rx_dma, .set_termios = qcom_geni_serial_set_termios, .startup = qcom_geni_serial_startup, .request_port = qcom_geni_serial_request_port, @@ -1405,9 +1609,9 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) port->tx_fifo_width = DEF_FIFO_WIDTH_BITS; if (!data->console) { - port->rx_fifo = devm_kcalloc(uport->dev, - port->rx_fifo_depth, sizeof(u32), GFP_KERNEL); - if (!port->rx_fifo) + port->rx_buf = devm_kzalloc(uport->dev, + DMA_RX_BUF_SIZE, GFP_KERNEL); + if (!port->rx_buf) return -ENOMEM; } @@ -1531,12 +1735,12 @@ static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev) static const struct qcom_geni_device_data qcom_geni_console_data = { .console = true, - .handle_rx = handle_rx_console, + .mode = GENI_SE_FIFO, }; static const struct qcom_geni_device_data qcom_geni_uart_data = { .console = false, - .handle_rx = handle_rx_uart, + .mode = GENI_SE_DMA, }; static const struct dev_pm_ops qcom_geni_serial_pm_ops = {