From patchwork Mon Nov 20 10:15:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kang Yang X-Patchwork-Id: 746444 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 24A2FC5AD4C for ; Mon, 20 Nov 2023 10:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233084AbjKTKQX (ORCPT ); Mon, 20 Nov 2023 05:16:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47456 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233050AbjKTKQU (ORCPT ); Mon, 20 Nov 2023 05:16:20 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BC555F1 for ; Mon, 20 Nov 2023 02:16:16 -0800 (PST) Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AK9cnR9029629; Mon, 20 Nov 2023 10:16:09 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=juEHgcilkt5VcNKtK9H4syfLVfpYZGuEprhEkgp/0Ak=; b=aJBxvm+ZAhOD/+29eGJ9yVd+0IwwduLfB4x4pjltnByZeNBeO/QpDgETe8l0gLir4aks hv91cGSgDc3941Jpw3aAsDNaKHiw3uSp6HKeTybhVibiTycyicnU22KMCph9K0HO2fo9 qCeSjYALeAlPPJ+KAmZYgso/ifM6rZk++0zlZqfA1934AKRwMImsK+YO3VkrqHeF0gbN szkAowCu/QwLVMK8vV5v6dnwB0zYXgAhUdV2kjvxtCEy7PrEl+UNZt3p/4ZP3V16lFwC k63d3Q+f/k7cw+p1ITIhZDE6qC/rpyE2/DFw2eSNhU6uZ58eSj9xhYPlNrSUxCwN0XCv OQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3uem9ebp4y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Nov 2023 10:16:09 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3AKAG8Ww032014 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Nov 2023 10:16:08 GMT Received: from yk-E5440.qca.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 20 Nov 2023 02:16:06 -0800 From: Kang Yang To: CC: , Subject: [PATCH 7/7] wifi: ath12k: set IRQ affinity to CPU0 in case of one MSI vector Date: Mon, 20 Nov 2023 18:15:43 +0800 Message-ID: <20231120101543.4369-8-quic_kangyang@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231120101543.4369-1-quic_kangyang@quicinc.com> References: <20231120101543.4369-1-quic_kangyang@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: pVPYu_4Ce5s-k8FE_XZWv5VK2egbE6b1 X-Proofpoint-GUID: pVPYu_4Ce5s-k8FE_XZWv5VK2egbE6b1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-20_07,2023-11-17_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 mlxscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 mlxlogscore=999 lowpriorityscore=0 bulkscore=0 phishscore=0 suspectscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311200068 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org With VT-d disabled on Intel platform, ath12k gets only one MSI vector. In that case, ath12k does not free IRQ when doing suspend, hence the kernel has to migrate it to CPU0 (if it was affine to other CPUs) and allocates a new MSI vector. However, ath12k has no chance to reconfig it to HW srngs during this phase, thus ath12k fails to resume. This issue can be fixed by setting IRQ affinity to CPU0 before request_irq is called. With such affinity, migration will not happen and thus the vector keeps unchanged during suspend/resume. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4 Signed-off-by: Kang Yang --- drivers/net/wireless/ath/ath12k/pci.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath12k/pci.c b/drivers/net/wireless/ath/ath12k/pci.c index 3850331438de..77074443ce00 100644 --- a/drivers/net/wireless/ath/ath12k/pci.c +++ b/drivers/net/wireless/ath/ath12k/pci.c @@ -617,6 +617,15 @@ static int ath12k_pci_ext_irq_config(struct ath12k_base *ab) return 0; } +static int ath12k_pci_set_irq_affinity_hint(struct ath12k_pci *ab_pci, + const struct cpumask *m) +{ + if (test_bit(ATH12K_PCI_FLAG_MULTI_MSI_VECTORS, &ab_pci->flags)) + return 0; + + return irq_set_affinity_hint(ab_pci->pdev->irq, m); +} + static int ath12k_pci_config_irq(struct ath12k_base *ab) { struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); @@ -1359,10 +1368,16 @@ static int ath12k_pci_probe(struct pci_dev *pdev, if (ret) goto err_pci_msi_free; + ret = ath12k_pci_set_irq_affinity_hint(ab_pci, cpumask_of(0)); + if (ret) { + ath12k_err(ab, "failed to set irq affinity %d\n", ret); + goto err_pci_msi_free; + } + ret = ath12k_mhi_register(ab_pci); if (ret) { ath12k_err(ab, "failed to register mhi: %d\n", ret); - goto err_pci_msi_free; + goto err_irq_affinity_cleanup; } ret = ath12k_hal_srng_init(ab); @@ -1416,6 +1431,9 @@ static int ath12k_pci_probe(struct pci_dev *pdev, err_pci_msi_free: ath12k_pci_msi_free(ab_pci); +err_irq_affinity_cleanup: + ath12k_pci_set_irq_affinity_hint(ab_pci, NULL); + err_pci_free_region: ath12k_pci_free_region(ab_pci); @@ -1430,6 +1448,8 @@ static void ath12k_pci_remove(struct pci_dev *pdev) struct ath12k_base *ab = pci_get_drvdata(pdev); struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); + ath12k_pci_set_irq_affinity_hint(ab_pci, NULL); + if (test_bit(ATH12K_FLAG_QMI_FAIL, &ab->dev_flags)) { ath12k_pci_power_down(ab); ath12k_qmi_deinit_service(ab); @@ -1456,7 +1476,9 @@ static void ath12k_pci_remove(struct pci_dev *pdev) static void ath12k_pci_shutdown(struct pci_dev *pdev) { struct ath12k_base *ab = pci_get_drvdata(pdev); + struct ath12k_pci *ab_pci = ath12k_pci_priv(ab); + ath12k_pci_set_irq_affinity_hint(ab_pci, NULL); ath12k_pci_power_down(ab); }