From patchwork Thu Apr 20 12:59:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 13218757 X-Patchwork-Delegate: bhelgaas@google.com 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 A7932C77B76 for ; Thu, 20 Apr 2023 13:00:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229506AbjDTNAg (ORCPT ); Thu, 20 Apr 2023 09:00:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230477AbjDTNAf (ORCPT ); Thu, 20 Apr 2023 09:00:35 -0400 Received: from smtp-relay-canonical-1.canonical.com (smtp-relay-canonical-1.canonical.com [185.125.188.121]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1D4340C6; Thu, 20 Apr 2023 06:00:33 -0700 (PDT) Received: from localhost.localdomain (unknown [10.101.196.174]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPSA id 65C3F41D91; Thu, 20 Apr 2023 13:00:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1681995632; bh=bSDqyUQmDXJf+AsjkLS1M/z8VFy5Mn2It7eZMkd0OPE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=p7H5vlhDlTiPjwhzZY91SmcaoJ9lPbMMCGWBV8Uyejhok0CVyMZhTZ1QvVSCKuYDa jk4Zcw/LCmIR+ETVYCe2f+MbxddgOHpGpbLevxVR7TC98oMr/AmAHvi0P2qpMmiPUq Lnn72GIR6eGx0bqn4DsRXasFHU9eLkcn4cmbQajr2LRLubF8MP5h4bZlnORRbEW72F 2zwJfNv48/aIfKW7dSNxfxv29xZzdZiREhFTTCZr8EeJG2aKTmXN3XiMzGjA9xzhYZ 3UnnMnUx8zGeUjI6rDRuDz+b2PgKQubozVla4YqXGl/+URDgWywNQISNKeFWWNpqXb jPxMpvhfz1bBg== From: Kai-Heng Feng To: bhelgaas@google.com Cc: mika.westerberg@linux.intel.com, koba.ko@canonical.com, sathyanarayanan.kuppuswamy@linux.intel.com, Kai-Heng Feng , Mahesh J Salgaonkar , "Oliver O'Halloran" , linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/4] PCI/AER: Factor out interrupt toggling into helpers Date: Thu, 20 Apr 2023 20:59:38 +0800 Message-Id: <20230420125941.333675-2-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230420125941.333675-1-kai.heng.feng@canonical.com> References: <20230420125941.333675-1-kai.heng.feng@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org There are many places that enable and disable AER interrput, so move them into helpers. Signed-off-by: Kai-Heng Feng Reviewed-by: Mika Westerberg Reviewed-by: Kuppuswamy Sathyanarayanan --- v3: - Correct subject. v2: - New patch. drivers/pci/pcie/aer.c | 45 +++++++++++++++++++++++++----------------- 1 file changed, 27 insertions(+), 18 deletions(-) diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index f6c24ded134c..1420e1f27105 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -1227,6 +1227,28 @@ static irqreturn_t aer_irq(int irq, void *context) return IRQ_WAKE_THREAD; } +static void aer_enable_irq(struct pci_dev *pdev) +{ + int aer = pdev->aer_cap; + u32 reg32; + + /* Enable Root Port's interrupt in response to error messages */ + pci_read_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, ®32); + reg32 |= ROOT_PORT_INTR_ON_MESG_MASK; + pci_write_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, reg32); +} + +static void aer_disable_irq(struct pci_dev *pdev) +{ + int aer = pdev->aer_cap; + u32 reg32; + + /* Disable Root's interrupt in response to error messages */ + pci_read_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, ®32); + reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK; + pci_write_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, reg32); +} + /** * aer_enable_rootport - enable Root Port's interrupts when receiving messages * @rpc: pointer to a Root Port data structure @@ -1256,10 +1278,7 @@ static void aer_enable_rootport(struct aer_rpc *rpc) pci_read_config_dword(pdev, aer + PCI_ERR_UNCOR_STATUS, ®32); pci_write_config_dword(pdev, aer + PCI_ERR_UNCOR_STATUS, reg32); - /* Enable Root Port's interrupt in response to error messages */ - pci_read_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, ®32); - reg32 |= ROOT_PORT_INTR_ON_MESG_MASK; - pci_write_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, reg32); + aer_enable_irq(pdev); } /** @@ -1274,10 +1293,7 @@ static void aer_disable_rootport(struct aer_rpc *rpc) int aer = pdev->aer_cap; u32 reg32; - /* Disable Root's interrupt in response to error messages */ - pci_read_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, ®32); - reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK; - pci_write_config_dword(pdev, aer + PCI_ERR_ROOT_COMMAND, reg32); + aer_disable_irq(pdev); /* Clear Root's error status reg */ pci_read_config_dword(pdev, aer + PCI_ERR_ROOT_STATUS, ®32); @@ -1372,12 +1388,8 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev) */ aer = root ? root->aer_cap : 0; - if ((host->native_aer || pcie_ports_native) && aer) { - /* Disable Root's interrupt in response to error messages */ - pci_read_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, ®32); - reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK; - pci_write_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, reg32); - } + if ((host->native_aer || pcie_ports_native) && aer) + aer_disable_irq(root); if (type == PCI_EXP_TYPE_RC_EC || type == PCI_EXP_TYPE_RC_END) { rc = pcie_reset_flr(dev, PCI_RESET_DO_RESET); @@ -1396,10 +1408,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev) pci_read_config_dword(root, aer + PCI_ERR_ROOT_STATUS, ®32); pci_write_config_dword(root, aer + PCI_ERR_ROOT_STATUS, reg32); - /* Enable Root Port's interrupt in response to error messages */ - pci_read_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, ®32); - reg32 |= ROOT_PORT_INTR_ON_MESG_MASK; - pci_write_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, reg32); + aer_enable_irq(root); } return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;