From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 017B41A29A; Thu, 28 Nov 2024 13:36:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732800965; cv=none; b=V6Qc6sAz11JakjJU8wH2lWXJSSeI2ONuJBKIXDyKqHQNosmhXlyyfRC6+zs0EcvkWkH4362GM4k9jmQqiadech7ViXMvbPRsKKWWi5QQcoumoDIH9lXKh1XSkfO8918fV+hoOsb1UYChizHum4l3s9cvXwTMozwKYx7mxK8WiRQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732800965; c=relaxed/simple; bh=oeA92mO+1aSFPpE10vWThNdGQtUxwKKsGQM7cWNQPx8=; h=Message-ID:Date:MIME-Version:Subject:To:CC:References:From: In-Reply-To:Content-Type; b=iUkOQDvDN/J9fK84dHcC9xsqI3WYUl3JuRGf1JH0LkW26WMT2OTFMqzxJBdPqMzKXzsR9TdCkCBQSSRpchdslwADAuieWZDTei8PEpcH+jpeffqeBM1pQsHLmlI9c2d9FbG3Mrep3xPPbmtFXjz9xFyYU4P34L5iCFpAEjeKBZw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=i2jW5Hlr; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="i2jW5Hlr" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4AS9IDXO012280; Thu, 28 Nov 2024 13:36:00 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 1sbpMS2lyQJTRXtdaP/okOhSVLIf3qlOOJSSmkZW2ag=; b=i2jW5HlrO7u0iRfE soxqbVsRtyX2cnXUtpAmkYd7eTgJRsdHkFetJG9op9gLFGGQ9WDBHvVUjNBVGopz T7erNDRSza5xGPxiKm+vdm4LHoX0Fzr9N3Si59w8rgTeNYOssTSLTJpXDqSeIzJA N01mIgDMZ+VLIAmI5Cwf18p17W1qL+gq8L9TNYJ1KhWpC6v7ugpelYLPSdKzeo+n Rfyebo0EVWNgSIsZeodgUn2AIiKV4e9ADiA+kZPViFBsiUaM0ETjdEIG6PK+9ckZ Xi5tKs4FwBBVeI/O6rB2puO4xUVrOgM/FlavFEKtz+P9AqOJrQJVxayhAxIxnN81 EO4uvg== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4366xy2t8r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Nov 2024 13:36:00 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA02.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4ASDZxkC019357 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Nov 2024 13:35:59 GMT Received: from [10.217.219.62] (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 28 Nov 2024 05:35:57 -0800 Message-ID: <56bf2e08-e8e3-4aca-9d51-176c009bedd5@quicinc.com> Date: Thu, 28 Nov 2024 19:05:54 +0530 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 0/1] Add immediate DMA support To: Mark Brown CC: Vinod Koul , , , , , , References: <20241121115201.2191-1-quic_jseerapu@quicinc.com> <073ae0ed-32bf-4097-850c-832cccda6b58@sirena.org.uk> Content-Language: en-US From: Jyothi Kumar Seerapu In-Reply-To: <073ae0ed-32bf-4097-850c-832cccda6b58@sirena.org.uk> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: -rnUU1UOtHQmxV8TVMHcz_py7cSJgueq X-Proofpoint-ORIG-GUID: -rnUU1UOtHQmxV8TVMHcz_py7cSJgueq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 clxscore=1015 malwarescore=0 suspectscore=0 adultscore=0 mlxlogscore=823 mlxscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2411280106 On 11/21/2024 5:32 PM, Mark Brown wrote: > On Thu, Nov 21, 2024 at 05:22:00PM +0530, Jyothi Kumar Seerapu wrote: >> The DMA TRE(Transfer ring element) buffer contains the DMA >> buffer address. Accessing data from this address can cause >> significant delays in SPI transfers, which can be mitigated to >> some extent by utilizing immediate DMA support. > > Please don't send cover letters for single patches, if there is anything > that needs saying put it in the changelog of the patch or after the --- > if it's administrative stuff. This reduces mail volume and ensures that > any important information is recorded in the changelog rather than being > lost. Sure, thanks. will follow it for single patch.