From mboxrd@z Thu Jan 1 00:00:00 1970 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 A6023C001B0 for ; Sun, 16 Jul 2023 20:01:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230518AbjGPUBK (ORCPT ); Sun, 16 Jul 2023 16:01:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230501AbjGPUBJ (ORCPT ); Sun, 16 Jul 2023 16:01:09 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B7A0EE for ; Sun, 16 Jul 2023 13:01:05 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DF68B60EBA for ; Sun, 16 Jul 2023 20:01:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC2D8C433C8; Sun, 16 Jul 2023 20:01:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689537664; bh=nFEGZ5+2DFaaUlC1wPd3QXgv9jAuD//KLcWqW9MwZZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BqqnGe5OIr8+WB6kDWjyAhnX2tH+wfkZ0ZK19XXb5tsVhJX0cqnb+Phf1GeKWpQOH r9zY+iPk+lqk3+QV3QLpXgjgIuzK+VCZd/5CKNPAFOokFkRdFumvvd2zEYu/JQA6/k nDLspiKVumwu5DOohXhV1HWIS1dLYuQp1CkN9GcI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vijaya Krishna Nivarthi , Douglas Anderson , Konrad Dybcio , Mark Brown , Sasha Levin Subject: [PATCH 6.4 149/800] soc: qcom: geni-se: Add interfaces geni_se_tx_init_dma() and geni_se_rx_init_dma() Date: Sun, 16 Jul 2023 21:40:02 +0200 Message-ID: <20230716194952.555732298@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Vijaya Krishna Nivarthi [ Upstream commit 6d6e57594957ee9131bc3802dfc8657ca6f78fee ] The geni_se_xx_dma_prep() interfaces necessarily do DMA mapping before initiating DMA transfers. This is not suitable for spi where framework is expected to handle map/unmap. Expose new interfaces geni_se_xx_init_dma() which do only DMA transfer. Signed-off-by: Vijaya Krishna Nivarthi Reviewed-by: Douglas Anderson Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/1684325894-30252-2-git-send-email-quic_vnivarth@quicinc.com Signed-off-by: Mark Brown Stable-dep-of: 3a76c7ca9e77 ("spi: spi-geni-qcom: Do not do DMA map/unmap inside driver, use framework instead") Signed-off-by: Sasha Levin --- drivers/soc/qcom/qcom-geni-se.c | 67 +++++++++++++++++++++++--------- include/linux/soc/qcom/geni-se.h | 4 ++ 2 files changed, 53 insertions(+), 18 deletions(-) diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c index 795a2e1d59b3a..dd50a255fa6cb 100644 --- a/drivers/soc/qcom/qcom-geni-se.c +++ b/drivers/soc/qcom/qcom-geni-se.c @@ -682,6 +682,30 @@ EXPORT_SYMBOL(geni_se_clk_freq_match); #define GENI_SE_DMA_EOT_EN BIT(1) #define GENI_SE_DMA_AHB_ERR_EN BIT(2) #define GENI_SE_DMA_EOT_BUF BIT(0) + +/** + * geni_se_tx_init_dma() - Initiate TX DMA transfer on the serial engine + * @se: Pointer to the concerned serial engine. + * @iova: Mapped DMA address. + * @len: Length of the TX buffer. + * + * This function is used to initiate DMA TX transfer. + */ +void geni_se_tx_init_dma(struct geni_se *se, dma_addr_t iova, size_t len) +{ + u32 val; + + val = GENI_SE_DMA_DONE_EN; + val |= GENI_SE_DMA_EOT_EN; + val |= GENI_SE_DMA_AHB_ERR_EN; + writel_relaxed(val, se->base + SE_DMA_TX_IRQ_EN_SET); + writel_relaxed(lower_32_bits(iova), se->base + SE_DMA_TX_PTR_L); + writel_relaxed(upper_32_bits(iova), se->base + SE_DMA_TX_PTR_H); + writel_relaxed(GENI_SE_DMA_EOT_BUF, se->base + SE_DMA_TX_ATTR); + writel(len, se->base + SE_DMA_TX_LEN); +} +EXPORT_SYMBOL(geni_se_tx_init_dma); + /** * geni_se_tx_dma_prep() - Prepare the serial engine for TX DMA transfer * @se: Pointer to the concerned serial engine. @@ -697,7 +721,6 @@ int geni_se_tx_dma_prep(struct geni_se *se, void *buf, size_t len, dma_addr_t *iova) { struct geni_wrapper *wrapper = se->wrapper; - u32 val; if (!wrapper) return -EINVAL; @@ -706,17 +729,34 @@ int geni_se_tx_dma_prep(struct geni_se *se, void *buf, size_t len, if (dma_mapping_error(wrapper->dev, *iova)) return -EIO; + geni_se_tx_init_dma(se, *iova, len); + return 0; +} +EXPORT_SYMBOL(geni_se_tx_dma_prep); + +/** + * geni_se_rx_init_dma() - Initiate RX DMA transfer on the serial engine + * @se: Pointer to the concerned serial engine. + * @iova: Mapped DMA address. + * @len: Length of the RX buffer. + * + * This function is used to initiate DMA RX transfer. + */ +void geni_se_rx_init_dma(struct geni_se *se, dma_addr_t iova, size_t len) +{ + u32 val; + val = GENI_SE_DMA_DONE_EN; val |= GENI_SE_DMA_EOT_EN; val |= GENI_SE_DMA_AHB_ERR_EN; - writel_relaxed(val, se->base + SE_DMA_TX_IRQ_EN_SET); - writel_relaxed(lower_32_bits(*iova), se->base + SE_DMA_TX_PTR_L); - writel_relaxed(upper_32_bits(*iova), se->base + SE_DMA_TX_PTR_H); - writel_relaxed(GENI_SE_DMA_EOT_BUF, se->base + SE_DMA_TX_ATTR); - writel(len, se->base + SE_DMA_TX_LEN); - return 0; + writel_relaxed(val, se->base + SE_DMA_RX_IRQ_EN_SET); + writel_relaxed(lower_32_bits(iova), se->base + SE_DMA_RX_PTR_L); + writel_relaxed(upper_32_bits(iova), se->base + SE_DMA_RX_PTR_H); + /* RX does not have EOT buffer type bit. So just reset RX_ATTR */ + writel_relaxed(0, se->base + SE_DMA_RX_ATTR); + writel(len, se->base + SE_DMA_RX_LEN); } -EXPORT_SYMBOL(geni_se_tx_dma_prep); +EXPORT_SYMBOL(geni_se_rx_init_dma); /** * geni_se_rx_dma_prep() - Prepare the serial engine for RX DMA transfer @@ -733,7 +773,6 @@ int geni_se_rx_dma_prep(struct geni_se *se, void *buf, size_t len, dma_addr_t *iova) { struct geni_wrapper *wrapper = se->wrapper; - u32 val; if (!wrapper) return -EINVAL; @@ -742,15 +781,7 @@ int geni_se_rx_dma_prep(struct geni_se *se, void *buf, size_t len, if (dma_mapping_error(wrapper->dev, *iova)) return -EIO; - val = GENI_SE_DMA_DONE_EN; - val |= GENI_SE_DMA_EOT_EN; - val |= GENI_SE_DMA_AHB_ERR_EN; - writel_relaxed(val, se->base + SE_DMA_RX_IRQ_EN_SET); - writel_relaxed(lower_32_bits(*iova), se->base + SE_DMA_RX_PTR_L); - writel_relaxed(upper_32_bits(*iova), se->base + SE_DMA_RX_PTR_H); - /* RX does not have EOT buffer type bit. So just reset RX_ATTR */ - writel_relaxed(0, se->base + SE_DMA_RX_ATTR); - writel(len, se->base + SE_DMA_RX_LEN); + geni_se_rx_init_dma(se, *iova, len); return 0; } EXPORT_SYMBOL(geni_se_rx_dma_prep); diff --git a/include/linux/soc/qcom/geni-se.h b/include/linux/soc/qcom/geni-se.h index c55a0bc8cb0e9..821a19135bb66 100644 --- a/include/linux/soc/qcom/geni-se.h +++ b/include/linux/soc/qcom/geni-se.h @@ -490,9 +490,13 @@ int geni_se_clk_freq_match(struct geni_se *se, unsigned long req_freq, unsigned int *index, unsigned long *res_freq, bool exact); +void geni_se_tx_init_dma(struct geni_se *se, dma_addr_t iova, size_t len); + int geni_se_tx_dma_prep(struct geni_se *se, void *buf, size_t len, dma_addr_t *iova); +void geni_se_rx_init_dma(struct geni_se *se, dma_addr_t iova, size_t len); + int geni_se_rx_dma_prep(struct geni_se *se, void *buf, size_t len, dma_addr_t *iova); -- 2.39.2