From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B412C433EF for ; Tue, 26 Oct 2021 04:16:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D421E6103B for ; Tue, 26 Oct 2021 04:16:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D421E6103B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=rhFk3/3/6h7BbyAYJ35dm5J+jfZ4WftvJe1yOd0VyP8=; b=TmY4Piu0PYUGQ4 7JynLVK1wd1DAMwCJfDhvyMY+uTJNgSEDXVjJu3c4exmfH8CBIYZZSQVdaJTcVlhVWg6SAj3/+NPa coz/WYrIt+YJ9xM5tPFaYKhJoXD+6BdCMTaPV4eXccywjVXzoWzBUxUlwGlmWb/JYQ1w0fMkjPC7O XAfrcUwdd3HpOArnHniDPXzk/UYNzyPqF0bCr82/RYJuKJOMnfJ2bz3jNZfkDd/fxwOiyvAXtW9jB YCtcLb/doA+3D67EoLpQ82DQ9yQBIfJozZ2/PzaBhLjarSbqokRxitJR26dRJe3NmFF0AdDNnC4il wipmH7cveTJz+jtiIWGQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfDtG-000ZLX-Sw; Tue, 26 Oct 2021 04:16:46 +0000 Received: from so254-9.mailgun.net ([198.61.254.9]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfDtD-000ZL0-VL for ath11k@lists.infradead.org; Tue, 26 Oct 2021 04:16:45 +0000 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1635221803; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=s3sDeVO1mHD4Ay8Uq2UsqVL8c2A989V2TO8gSEY50aU=; b=Nc9dKZ49ZkQzGmxYXJIGAwpnahudzMhnffqlpKNTu+rbir3Wez753VRNHkEFvYaXLM0u77HO eqrbYwjgBuhbWSLPYQSNiN/XUhav3G0IIQmgboNcB8c4XpQSbFC0vrWghW4Ho9kDgyOHOKbL WBVNUotWESw9Ydi9TcnTWsMi2xg= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyJmOGQ2ZiIsICJhdGgxMWtAbGlzdHMuaW5mcmFkZWFkLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n04.prod.us-east-1.postgun.com with SMTP id 6177812ac75c436a30c4e357 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 26 Oct 2021 04:16:42 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0B7C1C43616; Tue, 26 Oct 2021 04:16:42 +0000 (UTC) Received: from bqiang-Celadon-RN.qca.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bqiang) by smtp.codeaurora.org (Postfix) with ESMTPSA id CE74DC4338F; Tue, 26 Oct 2021 04:16:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org CE74DC4338F Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org From: Baochen Qiang To: ath11k@lists.infradead.org Cc: linux-wireless@vger.kernel.org Subject: [PATCH 1/7] ath11k: get msi_data again after request_irq is called Date: Tue, 26 Oct 2021 12:16:36 +0800 Message-Id: <20211026041636.5008-1-bqiang@codeaurora.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211025_211644_077372_24DA9589 X-CRM114-Status: GOOD ( 17.38 ) X-BeenThere: ath11k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath11k" Errors-To: ath11k-bounces+ath11k=archiver.kernel.org@lists.infradead.org From: Carl Huang The reservation mode of interrupts in kernel assigns a dummy vector when the interrupt is allocated and assigns a real vector when the request_irq is called. The reservation mode helps to ease vector pressure when devices with a large amount of queues/interrupts are initialized, but only a minimal subset of those queues/interrupts is actually used. So on reservation mode, the msi_data may change after request_irq is called, so ath11k reads msi_data again after request_irq is called, and then the correct msi_data is programmed into QCA6390 hardware components. Without this change, spurious interrupt occurs in case of one MSI vector. When VT-d in BIOS is enabled and ath11k can get 32 MSI vectors, ath11k always get the same msi_data before and after request_irq, that's why this change is only required when one MSI vector is to be supported. Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 Signed-off-by: Carl Huang Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath11k/pci.c | 30 +++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index 3d353e7c9d5c..8691e1649d6c 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -929,6 +929,25 @@ static void ath11k_pci_free_msi(struct ath11k_pci *ab_pci) pci_free_irq_vectors(ab_pci->pdev); } +static int ath11k_pci_config_msi_data(struct ath11k_pci *ab_pci) +{ + struct msi_desc *msi_desc; + + msi_desc = irq_get_msi_desc(ab_pci->pdev->irq); + if (!msi_desc) { + ath11k_err(ab_pci->ab, "msi_desc is NULL!\n"); + pci_free_irq_vectors(ab_pci->pdev); + return -EINVAL; + } + + ab_pci->msi_ep_base_data = msi_desc->msg.data; + + ath11k_dbg(ab_pci->ab, ATH11K_DBG_PCI, "pci after request_irq msi_ep_base_data %d\n", + ab_pci->msi_ep_base_data); + + return 0; +} + static int ath11k_pci_claim(struct ath11k_pci *ab_pci, struct pci_dev *pdev) { struct ath11k_base *ab = ab_pci->ab; @@ -1328,6 +1347,17 @@ static int ath11k_pci_probe(struct pci_dev *pdev, goto err_ce_free; } + /* kernel may allocate a dummy vector before request_irq and + * then allocate a real vector when request_irq is called. + * So get msi_data here again to avoid spurious interrupt + * as msi_data will configured to srngs. + */ + ret = ath11k_pci_config_msi_data(ab_pci); + if (ret) { + ath11k_err(ab, "failed to config msi_data: %d\n", ret); + goto err_free_irq; + } + ret = ath11k_core_init(ab); if (ret) { ath11k_err(ab, "failed to init core: %d\n", ret); -- 2.25.1 -- ath11k mailing list ath11k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath11k From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8822BC433EF for ; Tue, 26 Oct 2021 04:16:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6C0876103B for ; Tue, 26 Oct 2021 04:16:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230442AbhJZETH (ORCPT ); Tue, 26 Oct 2021 00:19:07 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:42774 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230433AbhJZETG (ORCPT ); Tue, 26 Oct 2021 00:19:06 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1635221802; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=s3sDeVO1mHD4Ay8Uq2UsqVL8c2A989V2TO8gSEY50aU=; b=vgieg7WkphV2DCL9r/WakGZac+F79J2huhMrqVAmwhdaIrFNxDGdCZRLNhn8jRfgfUP+g8mX 9vHCoUPUQJCQF7O3FAC7nOoBpv9JGKM/yJhrSJAezkpf3gr8SJf9XO8W7I681GNpdwRPJhkW +WbSsZJ83DNdaNxN9s6R/QtG35s= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-west-2.postgun.com with SMTP id 6177812adaa899cf7471cb53 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 26 Oct 2021 04:16:42 GMT Sender: bqiang=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0754BC4360C; Tue, 26 Oct 2021 04:16:42 +0000 (UTC) Received: from bqiang-Celadon-RN.qca.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bqiang) by smtp.codeaurora.org (Postfix) with ESMTPSA id CE74DC4338F; Tue, 26 Oct 2021 04:16:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org CE74DC4338F Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org From: Baochen Qiang To: ath11k@lists.infradead.org Cc: linux-wireless@vger.kernel.org Subject: [PATCH 1/7] ath11k: get msi_data again after request_irq is called Date: Tue, 26 Oct 2021 12:16:36 +0800 Message-Id: <20211026041636.5008-1-bqiang@codeaurora.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Carl Huang The reservation mode of interrupts in kernel assigns a dummy vector when the interrupt is allocated and assigns a real vector when the request_irq is called. The reservation mode helps to ease vector pressure when devices with a large amount of queues/interrupts are initialized, but only a minimal subset of those queues/interrupts is actually used. So on reservation mode, the msi_data may change after request_irq is called, so ath11k reads msi_data again after request_irq is called, and then the correct msi_data is programmed into QCA6390 hardware components. Without this change, spurious interrupt occurs in case of one MSI vector. When VT-d in BIOS is enabled and ath11k can get 32 MSI vectors, ath11k always get the same msi_data before and after request_irq, that's why this change is only required when one MSI vector is to be supported. Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 Signed-off-by: Carl Huang Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath11k/pci.c | 30 +++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index 3d353e7c9d5c..8691e1649d6c 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -929,6 +929,25 @@ static void ath11k_pci_free_msi(struct ath11k_pci *ab_pci) pci_free_irq_vectors(ab_pci->pdev); } +static int ath11k_pci_config_msi_data(struct ath11k_pci *ab_pci) +{ + struct msi_desc *msi_desc; + + msi_desc = irq_get_msi_desc(ab_pci->pdev->irq); + if (!msi_desc) { + ath11k_err(ab_pci->ab, "msi_desc is NULL!\n"); + pci_free_irq_vectors(ab_pci->pdev); + return -EINVAL; + } + + ab_pci->msi_ep_base_data = msi_desc->msg.data; + + ath11k_dbg(ab_pci->ab, ATH11K_DBG_PCI, "pci after request_irq msi_ep_base_data %d\n", + ab_pci->msi_ep_base_data); + + return 0; +} + static int ath11k_pci_claim(struct ath11k_pci *ab_pci, struct pci_dev *pdev) { struct ath11k_base *ab = ab_pci->ab; @@ -1328,6 +1347,17 @@ static int ath11k_pci_probe(struct pci_dev *pdev, goto err_ce_free; } + /* kernel may allocate a dummy vector before request_irq and + * then allocate a real vector when request_irq is called. + * So get msi_data here again to avoid spurious interrupt + * as msi_data will configured to srngs. + */ + ret = ath11k_pci_config_msi_data(ab_pci); + if (ret) { + ath11k_err(ab, "failed to config msi_data: %d\n", ret); + goto err_free_irq; + } + ret = ath11k_core_init(ab); if (ret) { ath11k_err(ab, "failed to init core: %d\n", ret); -- 2.25.1