From patchwork Fri Apr 12 06:06:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baochen Qiang X-Patchwork-Id: 788583 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 0E9842D630 for ; Fri, 12 Apr 2024 06:06:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712902008; cv=none; b=nFz/d6g45SINo84u9F++7u33SYt0fMzPBHUwEn6hT0BUefgJwgKft/j/Lob5TpFaz1Xb7Hpw65a0+mr4WJ44KQYGRVR1EdDWlwTiKS3uQFQw8bGCcmb9gkagVXGVECGINBk9qTa4v83H7y65uOaq7MDz6RwYn29ZPenBpBmcmEU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712902008; c=relaxed/simple; bh=t+TkjVWLco1SDdsfUMrYzo4d77OQmVjmtFsuMibrsME=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=KnFHS9k/gOR3J3RBjL1IBHrDZo5gp7Q5OG4q6Lh5Lf7W9PJaA5bWtMS8gP+v3cC6OkfKButH9aouhFQ9OIrifEDKHOI/zA3Ht0gPUFJOU/pgi0wFz/l0flqCUOjsKW5MKsS/Z+hW5wmksEIkGdhsJMzExdr9uPtH0+IU7TZIjK4= 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=H3aaubLh; arc=none smtp.client-ip=205.220.168.131 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="H3aaubLh" Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 43C4bFHE014112; Fri, 12 Apr 2024 06:06:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= qcppdkim1; bh=P6ZCaryHXYWRz0kI2Soi9uN3qEh+qXHERBjZgruRwaA=; b=H3 aaubLhlFR2czmV6J63lEP3vnw8QIHzwRwcYfHou/EeSTq8iqg2YAtDHlnRTZ/a1e qP6N/4/iRBk8dWP5Va2GxmJ22lTwe21m6yV9aSAH/8COGFwgf/2VHS/X3ZySQ6v5 za02jX2BGc8s8aHOF5yeSzZ3LRdoPy7G+OKhTfGp61FPu0JTeTSFDNBibekAB5Cz c3XdgGbU10Iv0M+SWaZ7bz0rdStTIY//E6boN/3pEwUvGdrjWA6ioMu64xz+MxPP PB8oycNo5lmQtaLqtks0G2vna8sSC4S4Nf/HFYA9cfnlSQ7stiSZzJ+GFOVYDxmx A+Y0AjwxyrAwzRmAc7Mg== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xewr38777-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 12 Apr 2024 06:06:43 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 43C66heW019961 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 12 Apr 2024 06:06:43 GMT Received: from bqiang-SFF.qca.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 11 Apr 2024 23:06:42 -0700 From: Baochen Qiang To: CC: , Subject: [PATCH 05/10] wifi: ath12k: decrease MHI channel buffer length to 8KB Date: Fri, 12 Apr 2024 14:06:15 +0800 Message-ID: <20240412060620.27519-6-quic_bqiang@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240412060620.27519-1-quic_bqiang@quicinc.com> References: <20240412060620.27519-1-quic_bqiang@quicinc.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: CSdlWmg5uvzq1-PjCme4fh1hIEV6kw2O X-Proofpoint-GUID: CSdlWmg5uvzq1-PjCme4fh1hIEV6kw2O X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-04-12_02,2024-04-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 phishscore=0 spamscore=0 lowpriorityscore=0 mlxscore=0 bulkscore=0 clxscore=1015 adultscore=0 mlxlogscore=851 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2404010003 definitions=main-2404120042 Currently buf_len field of ath12k_mhi_config_wcn7850 is assigned with 0, making MHI use a default size, 64KB, to allocate channel buffers. This is likely to fail in some scenarios where system memory is highly fragmented and memory compaction or reclaim is not allowed. For now we haven't get any failure report on this in ath12k, but there indeed is one such case in ath11k [1]. Actually those buffers are used only by QMI target -> host communication. And for WCN7850, the largest packet size for that is less than 6KB. So change buf_len field to 8KB, which results in order 1 allocation if page size is 4KB. In this way, we can at least save some memory, and as well as decrease the possibility of allocation failure in those scenarios. [1] https://lore.kernel.org/ath11k/96481a45-3547-4d23-ad34-3a8f1d90c1cd@suse.cz/ Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4 Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Baochen Qiang Acked-by: Jeff Johnson --- drivers/net/wireless/ath/ath12k/mhi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath12k/mhi.c b/drivers/net/wireless/ath/ath12k/mhi.c index 403691355abf..d6083a187021 100644 --- a/drivers/net/wireless/ath/ath12k/mhi.c +++ b/drivers/net/wireless/ath/ath12k/mhi.c @@ -140,7 +140,7 @@ const struct mhi_controller_config ath12k_mhi_config_wcn7850 = { .max_channels = 128, .timeout_ms = 2000, .use_bounce_buf = false, - .buf_len = 0, + .buf_len = 8192, .num_channels = ARRAY_SIZE(ath12k_mhi_channels_wcn7850), .ch_cfg = ath12k_mhi_channels_wcn7850, .num_events = ARRAY_SIZE(ath12k_mhi_events_wcn7850),