From patchwork Thu Jan 25 14:37:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 766230 Received: from mail-lj1-f179.google.com (mail-lj1-f179.google.com [209.85.208.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C04616EB44 for ; Thu, 25 Jan 2024 14:37:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706193435; cv=none; b=eGcQNNHDEhC0H8XME1/CowhlG+KvrXXmMd4G7b1sClREu8AtTZ2YItdxObpaNyKTCkcHmo+4NN2M2WPPJ59hjN8lkGey0wmUnBO7MSVOK67Jk1jl5jblvFfRVQc7LZV8s9QN5FRPllF7N1q28/onhLDcR2+0dAfJHv35QDcdHnc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706193435; c=relaxed/simple; bh=0MaLjPvVAK/Cs5uLyHsHrUqQa22L5UcKTRzT/Bd+/TE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=nkIwB6DGC1/Kdd53L5LBu3IJLlHgnHkn96Tp2sGv+zZxNx55kDAWpRLQ16vdhLqJjN1RbRANX9vT91eGndfGxL8jPPoe03l0Wktwv6L69ZXz2W1IL/aBz6CouspYc+VUx+6Ze71a5ZRRRB+pl1WddK/Belbui6XHsCeDms4Cgd4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=AzuRf5mY; arc=none smtp.client-ip=209.85.208.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="AzuRf5mY" Received: by mail-lj1-f179.google.com with SMTP id 38308e7fff4ca-2cf33b909e8so7533731fa.0 for ; Thu, 25 Jan 2024 06:37:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1706193432; x=1706798232; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=QMZtopgbN/6mQ0cUEkngEk6XwZC8BFLt+hjmWJEWvjI=; b=AzuRf5mYFkYYq1KgoxCGLREJC+z+q5yoKObRTy4qqG1+Ilb6SPtsJmIdCXAVW2tACu J+sHv9yPU8mIQW6MVx7BBlzIrFIYiwHTlhyHUjQ6dprMdk3Mvdo+neSOZz/Wndztfj4v fuSddKt7uXW6mqgrRGisDV5M97tqIqky7xkFVl+KMCauTrMKNholsqX106C8hAvWw6Xw tgknanGLdGIa94Lj3Hsnd7jWZPER3Zx3NV7gTXxTwm4ag2Zjn+8Htow9O9/K3D2+LDuD bT6Mclt+v/l+ky3sPPKuvT7OYJxp//CacJ7sUfxOB0TojgDB61U9li7Beb/fVQ8GtV0G gYzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706193432; x=1706798232; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=QMZtopgbN/6mQ0cUEkngEk6XwZC8BFLt+hjmWJEWvjI=; b=YKD+ZVzDQdIHz0vEH/PUBIso2rbqKPwAGP2PoMInp9zVEhDdc7TMnUckYrlHW2R3Xr GZhibxcetObbu5HXsQ50lO4ZWmLWdfoqIArrVnYvJkfm7Rf748P0cdrJl8qZo8HyLsh9 sFJDhjzijwHkwjk3OqpRZhbJcJPc1NTumDMrI4yqHFPDGTPZE0BuhX5mwvBNTznJUAba DzDo3lJF4qDcGOzcaZ2zhYiZIcLW8wU7RaHUpWSC4ze5CNy0fOqtAus9Q/LAVtGNdRw5 pgg95E2S/FCBaK5edHEZHkruAx/2DwADmKFrFrf+O82wJd9Tm+IZGSWE84DBSb3xPMoU MEYQ== X-Gm-Message-State: AOJu0Yx+QPI8JDrzJq39VWvBhx2oLOJJCEE8EsRB6COgGuHvU6U4cq1a b85HCaCxHbopRwkD6R/prIbHkUJhjhzcai9qlmVmXaRl00MRerpEwtt+Fsk3EQk= X-Google-Smtp-Source: AGHT+IG8fvrFL4nSLXe+ci61toej0QyVWsGZLLzDkrvRpvcBhGeNxbHJDgzn0gMd+tOrjICpC3tOsw== X-Received: by 2002:a2e:bcc7:0:b0:2cc:78b7:1ef0 with SMTP id z7-20020a2ebcc7000000b002cc78b71ef0mr979999ljp.4.1706193431959; Thu, 25 Jan 2024 06:37:11 -0800 (PST) Received: from [127.0.1.1] ([85.235.12.238]) by smtp.gmail.com with ESMTPSA id y24-20020a2e3218000000b002ce098d3f0asm292644ljy.115.2024.01.25.06.37.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jan 2024 06:37:11 -0800 (PST) From: Linus Walleij Date: Thu, 25 Jan 2024 15:37:09 +0100 Subject: [PATCH 5/7] mmc: omap: Map the virtual page for PIO Precedence: bulk X-Mailing-List: linux-omap@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240125-mmc-proper-kmap-v1-5-ba953c1ac3f9@linaro.org> References: <20240125-mmc-proper-kmap-v1-0-ba953c1ac3f9@linaro.org> In-Reply-To: <20240125-mmc-proper-kmap-v1-0-ba953c1ac3f9@linaro.org> To: Christoph Hellwig , Jens Axboe , Ming Lei , Arnd Bergmann , Ulf Hansson , Nicolas Pitre , Aaro Koskinen , Adrian Hunter , Angelo Dureghello Cc: linux-mmc@vger.kernel.org, linux-block@vger.kernel.org, linux-omap@vger.kernel.org, Linus Walleij X-Mailer: b4 0.12.4 Use kmap_local_page() instead of sg_virt() to obtain a page from the scatterlist: sg_virt() will not perform bounce buffering if the page happens to be located in high memory, which the driver may or may not be using. Suggested-by: Christoph Hellwig Link: https://lore.kernel.org/linux-mmc/20240122073423.GA25859@lst.de/ Signed-off-by: Linus Walleij --- drivers/mmc/host/omap.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index 9fb8995b43a1..3e36480b22ad 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -659,7 +659,7 @@ mmc_omap_sg_to_buf(struct mmc_omap_host *host) sg = host->data->sg + host->sg_idx; host->buffer_bytes_left = sg->length; - host->buffer = sg_virt(sg); + host->buffer = kmap_local_page(sg_page(sg)); if (host->buffer_bytes_left > host->total_bytes_left) host->buffer_bytes_left = host->total_bytes_left; } @@ -691,6 +691,11 @@ mmc_omap_xfer_data(struct mmc_omap_host *host, int write) nwords = DIV_ROUND_UP(n, 2); host->buffer_bytes_left -= n; + if (host->buffer_bytes_left == 0) { + kunmap_local(host->buffer); + host->buffer = NULL; + } + host->total_bytes_left -= n; host->data->bytes_xfered += n;