From patchwork Tue Mar 7 18:28:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Helgaas X-Patchwork-Id: 13164561 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 82714C678D5 for ; Tue, 7 Mar 2023 18:39:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232884AbjCGSja (ORCPT ); Tue, 7 Mar 2023 13:39:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232879AbjCGSi5 (ORCPT ); Tue, 7 Mar 2023 13:38:57 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 525278F72C; Tue, 7 Mar 2023 10:30:29 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id BCE9C61539; Tue, 7 Mar 2023 18:29:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F25DDC433A1; Tue, 7 Mar 2023 18:29:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1678213744; bh=2W4mTqL66cnI3Q1Av2sbikshcnOcST9Zd6947tR9OmM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b7Xw7jP+vrqoeZ3kp358N9bDL9hbc/5tMOAw0BN3Zh0SUfsuCIqjHBi9/nxJU32nK iz5liu5dZjx8FWdacyOWiLHowKtRI6W0svfKdqsYH4AfK7dGYJ/7MxXpYpu6El+Ahm JY7YBdT2AF/j6qcTiT8M2C59cMVZ3qEWuWFXe6lJY4POfXM9m0ycgM54aMrViaPkSQ liMfQPba+kTKD7WGXlkgJnXGnFSE38j6w5E08hl+iLoLfn642zZ4rSD24CA+O0K/f2 B+q8FBSmL7hO0tkUnp0ZR5lArcVYyMirPlX6YtcvonXA2gMzsqCfASw3WUVXE4+qRN UPJm8W09shCfg== From: Bjorn Helgaas To: "James E . J . Bottomley" , "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Bjorn Helgaas , James Smart , Dick Kennedy Subject: [PATCH 07/10] scsi: lpfc: Drop redundant pci_enable_pcie_error_reporting() Date: Tue, 7 Mar 2023 12:28:39 -0600 Message-Id: <20230307182842.870378-8-helgaas@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230307182842.870378-1-helgaas@kernel.org> References: <20230307182842.870378-1-helgaas@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bjorn Helgaas pci_enable_pcie_error_reporting() enables the device to send ERR_* Messages. Since f26e58bf6f54 ("PCI/AER: Enable error reporting when AER is native"), the PCI core does this for all devices during enumeration, so the driver doesn't need to do it itself. Remove the redundant pci_enable_pcie_error_reporting() call from the driver. Also remove the corresponding pci_disable_pcie_error_reporting() from the driver .remove() path. Note that this only controls ERR_* Messages from the device. An ERR_* Message may cause the Root Port to generate an interrupt, depending on the AER Root Error Command register managed by the AER service driver. Signed-off-by: Bjorn Helgaas Cc: James Smart Cc: Dick Kennedy --- drivers/scsi/lpfc/lpfc.h | 2 - drivers/scsi/lpfc/lpfc_attr.c | 96 ++++++++++------------------------- drivers/scsi/lpfc/lpfc_init.c | 1 - drivers/scsi/lpfc/lpfc_sli.c | 55 -------------------- 4 files changed, 27 insertions(+), 127 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h index cf55f8e3bd9f..5e3a93d13a91 100644 --- a/drivers/scsi/lpfc/lpfc.h +++ b/drivers/scsi/lpfc/lpfc.h @@ -1036,7 +1036,6 @@ struct lpfc_hba { #define FCF_TS_INPROG 0x200 /* FCF table scan in progress */ #define FCF_RR_INPROG 0x400 /* FCF roundrobin flogi in progress */ #define HBA_FIP_SUPPORT 0x800 /* FIP support in HBA */ -#define HBA_AER_ENABLED 0x1000 /* AER enabled with HBA */ #define HBA_DEVLOSS_TMO 0x2000 /* HBA in devloss timeout */ #define HBA_RRQ_ACTIVE 0x4000 /* process the rrq active list */ #define HBA_IOQ_FLUSH 0x8000 /* FCP/NVME I/O queues being flushed */ @@ -1190,7 +1189,6 @@ struct lpfc_hba { #define LPFC_MAX_ENBL_FC4_TYPE LPFC_ENABLE_FCP #define LPFC_DEF_ENBL_FC4_TYPE LPFC_ENABLE_FCP #endif - uint32_t cfg_aer_support; uint32_t cfg_sriov_nr_virtfn; uint32_t cfg_request_firmware_upgrade; uint32_t cfg_suppress_link_up; diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index 22f2e046e8eb..5cc7b59b528f 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -4365,13 +4365,22 @@ static DEVICE_ATTR_RW(lpfc_link_speed); /* # lpfc_aer_support: Support PCIe device Advanced Error Reporting (AER) -# 0 = aer disabled or not supported # 1 = aer supported and enabled (default) -# Value range is [0,1]. Default value is 1. +# PCIe error reporting is always enabled by the PCI core, so this always +# shows 1. +# +# N.B. Parts of LPFC_ATTR open-coded since some of the underlying +# infrastructure (phba->cfg_aer_support) is gone. */ -LPFC_ATTR(aer_support, 1, 0, 1, - "Enable PCIe device AER support"); -lpfc_param_show(aer_support) +static uint lpfc_aer_support = 1; +module_param(lpfc_aer_support, uint, S_IRUGO); +MODULE_PARM_DESC(lpfc_aer_support, "Enable PCIe device AER support"); +static ssize_t +lpfc_aer_support_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return scnprintf(buf, PAGE_SIZE, "%d\n", lpfc_aer_support); +} /** * lpfc_aer_support_store - Set the adapter for aer support @@ -4382,76 +4391,27 @@ lpfc_param_show(aer_support) * @count: unused variable. * * Description: - * If the val is 1 and currently the device's AER capability was not - * enabled, invoke the kernel's enable AER helper routine, trying to - * enable the device's AER capability. If the helper routine enabling - * AER returns success, update the device's cfg_aer_support flag to - * indicate AER is supported by the device; otherwise, if the device - * AER capability is already enabled to support AER, then do nothing. - * - * If the val is 0 and currently the device's AER support was enabled, - * invoke the kernel's disable AER helper routine. After that, update - * the device's cfg_aer_support flag to indicate AER is not supported - * by the device; otherwise, if the device AER capability is already - * disabled from supporting AER, then do nothing. + * PCIe error reporting is enabled by the PCI core, so drivers don't need + * to do anything. Retain this interface for backwards compatibility, + * but do nothing. * * Returns: - * length of the buf on success if val is in range the intended mode - * is supported. - * -EINVAL if val out of range or intended mode is not supported. + * length of the buf on success + * -EINVAL if val out of range **/ static ssize_t lpfc_aer_support_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct Scsi_Host *shost = class_to_shost(dev); - struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata; - struct lpfc_hba *phba = vport->phba; - int val = 0, rc = -EINVAL; + int val = 0; if (!isdigit(buf[0])) return -EINVAL; if (sscanf(buf, "%i", &val) != 1) return -EINVAL; - switch (val) { - case 0: - if (phba->hba_flag & HBA_AER_ENABLED) { - rc = pci_disable_pcie_error_reporting(phba->pcidev); - if (!rc) { - spin_lock_irq(&phba->hbalock); - phba->hba_flag &= ~HBA_AER_ENABLED; - spin_unlock_irq(&phba->hbalock); - phba->cfg_aer_support = 0; - rc = strlen(buf); - } else - rc = -EPERM; - } else { - phba->cfg_aer_support = 0; - rc = strlen(buf); - } - break; - case 1: - if (!(phba->hba_flag & HBA_AER_ENABLED)) { - rc = pci_enable_pcie_error_reporting(phba->pcidev); - if (!rc) { - spin_lock_irq(&phba->hbalock); - phba->hba_flag |= HBA_AER_ENABLED; - spin_unlock_irq(&phba->hbalock); - phba->cfg_aer_support = 1; - rc = strlen(buf); - } else - rc = -EPERM; - } else { - phba->cfg_aer_support = 1; - rc = strlen(buf); - } - break; - default: - rc = -EINVAL; - break; - } - return rc; + dev_info_once(dev, "PCIe error reporting automatically enabled by the PCI core; sysfs write ignored\n"); + return strlen(buf); } static DEVICE_ATTR_RW(lpfc_aer_support); @@ -4464,16 +4424,16 @@ static DEVICE_ATTR_RW(lpfc_aer_support); * @count: unused variable. * * Description: - * If the @buf contains 1 and the device currently has the AER support - * enabled, then invokes the kernel AER helper routine + * If the @buf contains 1, invokes the kernel AER helper routine * pci_aer_clear_nonfatal_status() to clean up the uncorrectable * error status register. * * Notes: * * Returns: - * -EINVAL if the buf does not contain the 1 or the device is not currently - * enabled with the AER support. + * -EINVAL if the buf does not contain 1 + * -EPERM if the OS cannot clear AER error status, i.e., when platform + * firmware owns the AER Capability **/ static ssize_t lpfc_aer_cleanup_state(struct device *dev, struct device_attribute *attr, @@ -4491,8 +4451,7 @@ lpfc_aer_cleanup_state(struct device *dev, struct device_attribute *attr, if (val != 1) return -EINVAL; - if (phba->hba_flag & HBA_AER_ENABLED) - rc = pci_aer_clear_nonfatal_status(phba->pcidev); + rc = pci_aer_clear_nonfatal_status(phba->pcidev); if (rc == 0) return strlen(buf); @@ -7277,7 +7236,6 @@ lpfc_get_cfgparam(struct lpfc_hba *phba) lpfc_sg_seg_cnt_init(phba, lpfc_sg_seg_cnt); lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth); - lpfc_aer_support_init(phba, lpfc_aer_support); lpfc_sriov_nr_virtfn_init(phba, lpfc_sriov_nr_virtfn); lpfc_request_firmware_upgrade_init(phba, lpfc_req_fw_upgrade); lpfc_suppress_link_up_init(phba, lpfc_suppress_link_up); diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 61958a24a43d..d3d4477dd472 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -32,7 +32,6 @@ #include #include #include -#include #include #include #include diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index c5b69f313af3..b2294e638e29 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -34,7 +34,6 @@ #include #include #include -#include #include #ifdef CONFIG_X86 #include @@ -5204,13 +5203,9 @@ lpfc_sli_brdrestart_s3(struct lpfc_hba *phba) volatile struct MAILBOX_word0 mb; struct lpfc_sli *psli; void __iomem *to_slim; - uint32_t hba_aer_enabled; spin_lock_irq(&phba->hbalock); - /* Take PCIe device Advanced Error Reporting (AER) state */ - hba_aer_enabled = phba->hba_flag & HBA_AER_ENABLED; - psli = &phba->sli; /* Restart HBA */ @@ -5251,10 +5246,6 @@ lpfc_sli_brdrestart_s3(struct lpfc_hba *phba) /* Give the INITFF and Post time to settle. */ mdelay(100); - /* Reset HBA AER if it was enabled, note hba_flag was reset above */ - if (hba_aer_enabled) - pci_disable_pcie_error_reporting(phba->pcidev); - lpfc_hba_down_post(phba); return 0; @@ -5273,7 +5264,6 @@ static int lpfc_sli_brdrestart_s4(struct lpfc_hba *phba) { struct lpfc_sli *psli = &phba->sli; - uint32_t hba_aer_enabled; int rc; /* Restart HBA */ @@ -5281,9 +5271,6 @@ lpfc_sli_brdrestart_s4(struct lpfc_hba *phba) "0296 Restart HBA Data: x%x x%x\n", phba->pport->port_state, psli->sli_flag); - /* Take PCIe device Advanced Error Reporting (AER) state */ - hba_aer_enabled = phba->hba_flag & HBA_AER_ENABLED; - rc = lpfc_sli4_brdreset(phba); if (rc) { phba->link_state = LPFC_HBA_ERROR; @@ -5301,10 +5288,6 @@ lpfc_sli_brdrestart_s4(struct lpfc_hba *phba) memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets)); psli->stats_start = ktime_get_seconds(); - /* Reset HBA AER if it was enabled, note hba_flag was reset above */ - if (hba_aer_enabled) - pci_disable_pcie_error_reporting(phba->pcidev); - hba_down_queue: lpfc_hba_down_post(phba); lpfc_sli4_queue_destroy(phba); @@ -5725,25 +5708,6 @@ lpfc_sli_hba_setup(struct lpfc_hba *phba) } phba->fcp_embed_io = 0; /* SLI4 FC support only */ - /* Enable PCIe device Advanced Error Reporting (AER) if configured */ - if (phba->cfg_aer_support == 1 && !(phba->hba_flag & HBA_AER_ENABLED)) { - rc = pci_enable_pcie_error_reporting(phba->pcidev); - if (!rc) { - lpfc_printf_log(phba, KERN_INFO, LOG_INIT, - "2709 This device supports " - "Advanced Error Reporting (AER)\n"); - spin_lock_irq(&phba->hbalock); - phba->hba_flag |= HBA_AER_ENABLED; - spin_unlock_irq(&phba->hbalock); - } else { - lpfc_printf_log(phba, KERN_INFO, LOG_INIT, - "2708 This device does not support " - "Advanced Error Reporting (AER): %d\n", - rc); - phba->cfg_aer_support = 0; - } - } - if (phba->sli_rev == 3) { phba->iocb_cmd_size = SLI3_IOCB_CMD_SIZE; phba->iocb_rsp_size = SLI3_IOCB_RSP_SIZE; @@ -9053,25 +9017,6 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba) mod_timer(&phba->eratt_poll, jiffies + msecs_to_jiffies(1000 * phba->eratt_poll_interval)); - /* Enable PCIe device Advanced Error Reporting (AER) if configured */ - if (phba->cfg_aer_support == 1 && !(phba->hba_flag & HBA_AER_ENABLED)) { - rc = pci_enable_pcie_error_reporting(phba->pcidev); - if (!rc) { - lpfc_printf_log(phba, KERN_INFO, LOG_INIT, - "2829 This device supports " - "Advanced Error Reporting (AER)\n"); - spin_lock_irq(&phba->hbalock); - phba->hba_flag |= HBA_AER_ENABLED; - spin_unlock_irq(&phba->hbalock); - } else { - lpfc_printf_log(phba, KERN_INFO, LOG_INIT, - "2830 This device does not support " - "Advanced Error Reporting (AER)\n"); - phba->cfg_aer_support = 0; - } - rc = 0; - } - /* * The port is ready, set the host's link state to LINK_DOWN * in preparation for link interrupts.