From patchwork Mon Jun 28 12:34:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 12347889 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 50598C49EAB for ; Mon, 28 Jun 2021 12:34:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 334DB61C71 for ; Mon, 28 Jun 2021 12:34:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232557AbhF1Mgv (ORCPT ); Mon, 28 Jun 2021 08:36:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38640 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233025AbhF1Mgp (ORCPT ); Mon, 28 Jun 2021 08:36:45 -0400 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D89EC061787 for ; Mon, 28 Jun 2021 05:34:19 -0700 (PDT) Received: by mail-wm1-x335.google.com with SMTP id u5-20020a7bc0450000b02901480e40338bso9459535wmc.1 for ; Mon, 28 Jun 2021 05:34:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=iVU8ksdsC+XVYHG6Ii2wFQdpGHXdxNGIwH1FktLhWE0=; b=rMh4uZ9nvr/h9VpazM6ooNldYywwlfGegmwt2M9QV+5GtRgMf8W642d+IIOfEYw1Q+ J+sn+ZMT6Y8eTUrE4J9I4LzpB0ghsNr/njpWf/RaQomIdctZGC5tSIKmcfodSwtqtjvO 2paN31k8ASzujjKNWQBXmrVSH25ubIJmD4KOUr/7hGXCWY5w4HwY1ETk+TkvtNgR3T8I IdpHrwJhQTR6bHPkpRi4l9tjueCXP6e7ekKY/8s5zIcys/X0fXUaeHM5MEgRA74qbL1F mFZhV8qdRHXqK8sJZwSev8Q5s4TXh7YKx1RIMsd31X90wb+3D4r3lUT3ES7h0Tt7VT+5 /oIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=iVU8ksdsC+XVYHG6Ii2wFQdpGHXdxNGIwH1FktLhWE0=; b=c0HKkzkLUHpjR6ibw6eBBv5XFVspiExsmx660SFji+vof8RZYU9SG5Z2MscQZOWC65 Wdo/Pm50ekYKFdwReBFKTIk+dhqPoTtJEMJh8u+IB0gHKJxa1INr/QJF6exha9Lpm3Vk /FCTz7J5BPHoSIL6StKyCTOXV0Cypb5FU6svFhD7555PJzexpZ8QX62OU9tZI3L6xmIj o6aeehhCnclsdPBZzP33DLuVLTQtPgiCuqW4GBCVANL122DgIn3lX8V+RImzMZRzGg9o UEd/uvLN4FAj6FJi3aJUIm4iCxOnn7aAu4yJCdLBT0BfA4kLMn2tC6M97ZOaR658McAL o2yA== X-Gm-Message-State: AOAM533o3RsRpSpeAr9rCB6Hz4lEgJXrLIBUOgWo0aLAX8xGajmqBpJQ k6+d9jiCkEnBaqhvehMoH8+88g== X-Google-Smtp-Source: ABdhPJx9klALOlzLwyUXrhxNb6Gsy/pGhiZ2wKZ23hTV0TLHksTI/vl4A4xAcaMGwetVptGG6RZA6g== X-Received: by 2002:a1c:4b05:: with SMTP id y5mr26638745wma.5.1624883658053; Mon, 28 Jun 2021 05:34:18 -0700 (PDT) Received: from localhost.localdomain ([2001:861:44c0:66c0:e503:e76:4043:c4f7]) by smtp.gmail.com with ESMTPSA id p7sm2357334wrr.68.2021.06.28.05.34.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Jun 2021 05:34:17 -0700 (PDT) From: Neil Armstrong To: jgg@ziepe.ca, leon@kernel.org, m.szyprowski@samsung.com, robin.murphy@arm.com, ulf.hansson@linaro.org Cc: torvalds@linux-foundation.org, khilman@baylibre.com, jbrunet@baylibre.com, linux-mmc@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Neil Armstrong Subject: [PATCH RFC 2/2] mmc: meson-gx: use sg_copy_to/from_io instead of local version Date: Mon, 28 Jun 2021 14:34:11 +0200 Message-Id: <20210628123411.119778-3-narmstrong@baylibre.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210628123411.119778-1-narmstrong@baylibre.com> References: <20210628123411.119778-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3110; h=from:subject; bh=BPfTCGN4I6YQ41hxb4uDuKkhPMuH99t5aMh92aBorsk=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBg2cGYprSmh7eQkK8b0Smn83LQZAlmMENEw7F1uZek 2i7J5qWJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCYNnBmAAKCRB33NvayMhJ0d8ND/ wN/x1wUT6Y0c6P2LcYAfrhi0cuARzL3mx00mrqR9K0vL2tmj0w6z0DnOPTVlKzgw/pm3OxT8NcazmA U5o8yWVoPWqACBbQgSjlMSG6nfriKiiz2cor/5DoVnTW20ELSLayjVvERcageFnffPArCIOVty+vQu hmBKYEzqvdOeKD4Np34Pp5nzc+m/55P2orNBrJkCC/Lo3OTCkY56we+lpHz+FGQPf//FVx/qoMtTpo 4ohVieXNHfJteDeiuZViO+A5ZP3F7khBbT9Gz+U8t0jMZZctDy8IDDzrtk+CuBQIyDH7FUtVnjeAkL y6m0IFG66c9rDhwziMRCghTi/c9oybJBJf6ABz3kdS9sIsiou00OnPR//AjUX5gQPRe72j730k/bTl zspYNztdYjhHBHE5SK/Hh9Jm+BDZf/PtW+HdhnQKbJhHPrt6fG+U90KaBr44vLdUmeK+VoDzTAqR6c R3aHznEgr90iy+oSasMPAe4u/BqN7gLMwTGSB7aiNhSoWqW5cN2ytK8FV+TzxYX9QmJBXk34EMw6E6 rVadBWdPRjTeGKl2gJFE3JkPB8BFL7fGZ2YxDCc5jk3VwySG4VLHeuHzIxkOX3snEJPwy69Tu3Cmi/ MxxFNjWPosVhlFxsWuDXHe5kmj2e5JY4IWhojlAGn8szVazYWWCIua2ynMFA== X-Developer-Key: i=narmstrong@baylibre.com; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Use the proper sg_copy_to_io & sg_copy_from_io instead of having a local sg_copy_buffer variant to handle the I/O mapped buffer case. Cc: Robin Murphy Signed-off-by: Neil Armstrong --- drivers/mmc/host/meson-gx-mmc.c | 53 +++++++-------------------------- 1 file changed, 10 insertions(+), 43 deletions(-) diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 3f28eb4d17fe..c13436efb414 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -746,47 +746,6 @@ static void meson_mmc_desc_chain_transfer(struct mmc_host *mmc, u32 cmd_cfg) writel(start, host->regs + SD_EMMC_START); } -/* local sg copy to buffer version with _to/fromio usage for dram_access_quirk */ -static void meson_mmc_copy_buffer(struct meson_host *host, struct mmc_data *data, - size_t buflen, bool to_buffer) -{ - unsigned int sg_flags = SG_MITER_ATOMIC; - struct scatterlist *sgl = data->sg; - unsigned int nents = data->sg_len; - struct sg_mapping_iter miter; - unsigned int offset = 0; - - if (to_buffer) - sg_flags |= SG_MITER_FROM_SG; - else - sg_flags |= SG_MITER_TO_SG; - - sg_miter_start(&miter, sgl, nents, sg_flags); - - while ((offset < buflen) && sg_miter_next(&miter)) { - unsigned int len; - - len = min(miter.length, buflen - offset); - - /* When dram_access_quirk, the bounce buffer is a iomem mapping */ - if (host->dram_access_quirk) { - if (to_buffer) - memcpy_toio(host->bounce_iomem_buf + offset, miter.addr, len); - else - memcpy_fromio(miter.addr, host->bounce_iomem_buf + offset, len); - } else { - if (to_buffer) - memcpy(host->bounce_buf + offset, miter.addr, len); - else - memcpy(miter.addr, host->bounce_buf + offset, len); - } - - offset += len; - } - - sg_miter_stop(&miter); -} - static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd) { struct meson_host *host = mmc_priv(mmc); @@ -830,7 +789,12 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd) if (data->flags & MMC_DATA_WRITE) { cmd_cfg |= CMD_CFG_DATA_WR; WARN_ON(xfer_bytes > host->bounce_buf_size); - meson_mmc_copy_buffer(host, data, xfer_bytes, true); + if (host->dram_access_quirk) + sg_copy_to_io(data->sg, data->sg_len, + host->bounce_iomem_buf, xfer_bytes); + else + sg_copy_to_buffer(data->sg, data->sg_len, + host->bounce_buf, xfer_bytes); dma_wmb(); } @@ -999,7 +963,10 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id) if (meson_mmc_bounce_buf_read(data)) { xfer_bytes = data->blksz * data->blocks; WARN_ON(xfer_bytes > host->bounce_buf_size); - meson_mmc_copy_buffer(host, data, xfer_bytes, false); + if (host->dram_access_quirk) + sg_copy_from_io(data->sg, data->sg_len, host->bounce_iomem_buf, xfer_bytes); + else + sg_copy_from_buffer(data->sg, data->sg_len, host->bounce_buf, xfer_bytes); } next_cmd = meson_mmc_get_next_command(cmd);