From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E35192F34 for ; Thu, 13 Jun 2024 19:04:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718305466; cv=none; b=IXHC/epTFvDH8R9T276fzMDUQxk+pJA+Ew2IZyHL0UV64iFB3t1x/hSH5U0QGPoyGZz/F5X44o7tuK9VKbcUVbr0JSjkT92DbeflCeQdUjHM6VpiputMo5+LfAsVvSIEi3aN/faCsOt+Xv6Pz7bwIHpXXeMRmHparsXv868pScM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718305466; c=relaxed/simple; bh=VmH6Xs8EEjKAJ4nXaWg86oIMy4U4mWMK+KqRTYcrAec=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=bnDwFjqXYvXBaHo1LT1HfiqZuzCreqUKYO8dtjCSq6FhwcbKNmsV27EMKvFIYt6bLeYpXP5FZqP0Gluieax/kldbjEOAL/uGJP9tJZzmT3/OOuxSX7aAoQUt1+4091lpk2wKtVX8VV41y/JrgeiWa6dzHKpg6aIwjCsUfo5Pyf8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=d/dfm2Zt; arc=none smtp.client-ip=209.85.214.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="d/dfm2Zt" Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-1f6e183f084so10941135ad.1 for ; Thu, 13 Jun 2024 12:04:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1718305463; x=1718910263; darn=vger.kernel.org; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=rf9N+JJ4IW6vVgICvfMoTAEbf+E3O3QEPy0WY/uTkLY=; b=d/dfm2ZtP6W0d/gXGI8flcJl78HILr32OmHVVaXt08Csxb1C2LodT84sCkqum4B0/w 3NkVrdHKl8dFcrCIpJScuWlP09ve2wlVRI6DAEF/gNm3jTLgx9sTqfEcwGclAbOz3wq8 NPgHKuadioe+ClASzLYu4iqeoxXD6GEQpESNo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718305463; x=1718910263; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=rf9N+JJ4IW6vVgICvfMoTAEbf+E3O3QEPy0WY/uTkLY=; b=D0NtnXov47w6txUue6oxk/jASPCYzW7VxgaPiLF4P+B5G++uaPzXe0RFj9dZCHE0+d frqUAOjVjD7ljGrmqx+OGsR67ZdyUmwpxZpVpxXASwfNiiCq+N7+A/RL5Fr14Zrmn42i arZzGhPUV0GA5NBg+GlS1DnBzhNZnZPNONZtmu6sy03exBKCYcYt55AWW28iGv2rAfCy ujfeaCf2F7mUAgaGmv65HN0Dq1bRet9M2tn2hxJbszOsmutARpL95meGdBLAYFO5S7iS BK5flrytvHbznYHfK82joo09NbGrpZVt9b8RqHeMILCXiuzZZtEDGseRIf4IbkZuiYiC DxbQ== X-Forwarded-Encrypted: i=1; AJvYcCXYcq/Cb70QtKtSe0W6f4Ub9tjYiZ4zU5TYelrLv2D6ic234i4Mf8MyTjMUzzoDIy/yoHoue2qf+jFzdaLIDbqvpFfRRwBEmobi X-Gm-Message-State: AOJu0YyXb1IfMDNG3QcnMGQEHDAZL/NrFl/5HgFErFX9uRasn0My3DW7 p09DOcxXpmlnTRZkczyFUc1AgvME/bCDgjkQzMRBq9G2P/dT0o3EtDvvofv4wQ== X-Google-Smtp-Source: AGHT+IHg2g6TysQQxQsRv88QKCRGZH+ClL/vPVq5MZqh9NXgC6ZuoHNSmUqUDyL0VpHVysasVJxmbg== X-Received: by 2002:a17:902:eccc:b0:1f7:5a6c:ae3e with SMTP id d9443c01a7336-1f8627e337dmr8346425ad.33.1718305463084; Thu, 13 Jun 2024 12:04:23 -0700 (PDT) Received: from localhost.localdomain ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f855f16a3esm17366905ad.232.2024.06.13.12.04.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Jun 2024 12:04:22 -0700 (PDT) From: Sumit Saxena To: martin.petersen@oracle.com, helgaas@kernel.org, sathya.prakash@broadcom.com, chandrakanth.patil@broadcom.com, ranjan.kumar@broadcom.com, prayas.patel@broadcom.com Cc: linux-scsi@vger.kernel.org, linux-pci@vger.kernel.org, Sumit Saxena Subject: [PATCH v3 1/3] mpi3mr: Support PCIe Error Recovery callback handlers Date: Fri, 14 Jun 2024 00:30:20 +0530 Message-Id: <20240613190022.4128-2-sumit.saxena@broadcom.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240613190022.4128-1-sumit.saxena@broadcom.com> References: <20240613190022.4128-1-sumit.saxena@broadcom.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000c6096d061aca2ac5" --000000000000c6096d061aca2ac5 Content-Transfer-Encoding: 8bit This patch adds support for the PCIe error recovery callback handlers which is crucial for the recovery of the controllers. This feature is necessary for addressing the errors reported by the PCI Error Recovery mechanism. Signed-off-by: Sathya Prakash Signed-off-by: Ranjan Kumar Signed-off-by: Sumit Saxena --- drivers/scsi/mpi3mr/mpi3mr.h | 7 +- drivers/scsi/mpi3mr/mpi3mr_os.c | 221 ++++++++++++++++++++++++++++++++ 2 files changed, 227 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h index 8255ef1854ac..a2c236babb52 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -130,6 +131,7 @@ extern atomic64_t event_counter; #define MPI3MR_PREPARE_FOR_RESET_TIMEOUT 180 #define MPI3MR_RESET_ACK_TIMEOUT 30 #define MPI3MR_MUR_TIMEOUT 120 +#define MPI3MR_RESET_TIMEOUT 510 #define MPI3MR_WATCHDOG_INTERVAL 1000 /* in milli seconds */ @@ -1173,7 +1175,8 @@ struct scmd_priv { * @trace_release_trigger_active: Trace trigger active flag * @fw_release_trigger_active: Fw release trigger active flag * @snapdump_trigger_active: Snapdump trigger active flag - * + * @pci_err_recovery: PCI error recovery in progress + * @block_on_pci_err: Block IO during PCI error recovery */ struct mpi3mr_ioc { struct list_head list; @@ -1377,6 +1380,8 @@ struct mpi3mr_ioc { bool snapdump_trigger_active; bool trace_release_trigger_active; bool fw_release_trigger_active; + bool pci_err_recovery; + bool block_on_pci_err; }; /** diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index eac179dc9370..9e532467faf1 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -5546,6 +5546,219 @@ mpi3mr_resume(struct device *dev) return 0; } +/** + * mpi3mr_pcierr_detected - PCI error detected callback + * @pdev: PCI device instance + * @state: channel state + * + * This function is called by the PCI error recovery driver and + * based on the state passed the driver decides what actions to + * be recommended back to PCI driver. + * + * For all of the states if there is no valid mrioc or scsi host + * references in the PCI device then this function will return + * the result as disconnect. + * + * For normal state, this function will return the result as can + * recover. + * + * For frozen state, this function will block for any pending + * controller initialization or re-initialization to complete, + * stop any new interactions with the controller and return + * status as reset required. + * + * For permanent failure state, this function will mark the + * controller as unrecoverable and return status as disconnect. + * + * Returns: PCI_ERS_RESULT_NEED_RESET or CAN_RECOVER or + * DISCONNECT based on the controller state. + */ +static pci_ers_result_t +mpi3mr_pcierr_detected(struct pci_dev *pdev, pci_channel_state_t state) +{ + struct Scsi_Host *shost; + struct mpi3mr_ioc *mrioc; + unsigned int timeout = MPI3MR_RESET_TIMEOUT; + + dev_info(&pdev->dev, "%s: callback invoked state(%d)\n", __func__, + state); + + shost = pci_get_drvdata(pdev); + mrioc = shost_priv(shost); + + if (!shost || !mrioc) { + dev_err(&pdev->dev, "device not available\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + switch (state) { + case pci_channel_io_normal: + return PCI_ERS_RESULT_CAN_RECOVER; + case pci_channel_io_frozen: + mrioc->pci_err_recovery = true; + mrioc->block_on_pci_err = true; + do { + if (mrioc->reset_in_progress || mrioc->is_driver_loading) + ssleep(1); + else + break; + } while (--timeout); + + if (!timeout) { + mrioc->pci_err_recovery = true; + mrioc->block_on_pci_err = true; + mrioc->unrecoverable = 1; + mpi3mr_stop_watchdog(mrioc); + mpi3mr_flush_cmds_for_unrecovered_controller(mrioc); + return PCI_ERS_RESULT_DISCONNECT; + } + + scsi_block_requests(mrioc->shost); + mpi3mr_stop_watchdog(mrioc); + mpi3mr_cleanup_resources(mrioc); + return PCI_ERS_RESULT_NEED_RESET; + case pci_channel_io_perm_failure: + mrioc->pci_err_recovery = true; + mrioc->block_on_pci_err = true; + mrioc->unrecoverable = 1; + mpi3mr_stop_watchdog(mrioc); + mpi3mr_flush_cmds_for_unrecovered_controller(mrioc); + return PCI_ERS_RESULT_DISCONNECT; + default: + return PCI_ERS_RESULT_DISCONNECT; + } +} + +/** + * mpi3mr_pcierr_slot_reset - Post slot reset callback + * @pdev: PCI device instance + * + * This function is called by the PCI error recovery driver + * after a slot or link reset issued by it for the recovery, the + * driver is expected to bring back the controller and + * initialize it. + * + * This function restores PCI state and reinitializes controller + * resources and the controller, this blocks for any pending + * reset to complete. + * + * Returns: PCI_ERS_RESULT_DISCONNECT on failure or + * PCI_ERS_RESULT_RECOVERED + */ +static pci_ers_result_t mpi3mr_pcierr_slot_reset(struct pci_dev *pdev) +{ + struct Scsi_Host *shost; + struct mpi3mr_ioc *mrioc; + unsigned int timeout = MPI3MR_RESET_TIMEOUT; + + dev_info(&pdev->dev, "%s: callback invoked\n", __func__); + + shost = pci_get_drvdata(pdev); + mrioc = shost_priv(shost); + + if (!shost || !mrioc) { + dev_err(&pdev->dev, "device not available\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + do { + if (mrioc->reset_in_progress) + ssleep(1); + else + break; + } while (--timeout); + + if (!timeout) + goto out_failed; + + pci_restore_state(pdev); + + if (mpi3mr_setup_resources(mrioc)) { + ioc_err(mrioc, "setup resources failed\n"); + goto out_failed; + } + mrioc->unrecoverable = 0; + mrioc->pci_err_recovery = false; + + if (mpi3mr_soft_reset_handler(mrioc, MPI3MR_RESET_FROM_FIRMWARE, 0)) + goto out_failed; + + return PCI_ERS_RESULT_RECOVERED; + +out_failed: + mrioc->unrecoverable = 1; + mrioc->block_on_pci_err = false; + scsi_unblock_requests(shost); + mpi3mr_start_watchdog(mrioc); + return PCI_ERS_RESULT_DISCONNECT; +} + +/** + * mpi3mr_pcierr_resume - PCI error recovery resume + * callback + * @pdev: PCI device instance + * + * This function enables all I/O and IOCTLs post reset issued as + * part of the PCI error recovery + * + * Return: Nothing. + */ +static void mpi3mr_pcierr_resume(struct pci_dev *pdev) +{ + struct Scsi_Host *shost; + struct mpi3mr_ioc *mrioc; + + dev_info(&pdev->dev, "%s: callback invoked\n", __func__); + + shost = pci_get_drvdata(pdev); + mrioc = shost_priv(shost); + + if (!shost || !mrioc) { + dev_err(&pdev->dev, "device not available\n"); + return; + } + + pci_aer_clear_nonfatal_status(pdev); + + if (mrioc->block_on_pci_err) { + mrioc->block_on_pci_err = false; + scsi_unblock_requests(shost); + mpi3mr_start_watchdog(mrioc); + } +} + +/** + * mpi3mr_pcierr_mmio_enabled - PCI error recovery callback + * @pdev: PCI device instance + * + * This is called only if _pcierr_error_detected returns + * PCI_ERS_RESULT_CAN_RECOVER. + * + * Return: PCI_ERS_RESULT_DISCONNECT when the controller is + * unrecoverable or when the shost/mrioc reference cannot be + * found, else return PCI_ERS_RESULT_RECOVERED + */ +static pci_ers_result_t mpi3mr_pcierr_mmio_enabled(struct pci_dev *pdev) +{ + struct Scsi_Host *shost; + struct mpi3mr_ioc *mrioc; + + dev_info(&pdev->dev, "%s: callback invoked\n", __func__); + + shost = pci_get_drvdata(pdev); + mrioc = shost_priv(shost); + + if (!shost || !mrioc) { + dev_err(&pdev->dev, "device not available\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + if (mrioc->unrecoverable) + return PCI_ERS_RESULT_DISCONNECT; + + return PCI_ERS_RESULT_RECOVERED; +} + static const struct pci_device_id mpi3mr_pci_id_table[] = { { PCI_DEVICE_SUB(MPI3_MFGPAGE_VENDORID_BROADCOM, @@ -5563,6 +5776,13 @@ static const struct pci_device_id mpi3mr_pci_id_table[] = { }; MODULE_DEVICE_TABLE(pci, mpi3mr_pci_id_table); +static struct pci_error_handlers mpi3mr_err_handler = { + .error_detected = mpi3mr_pcierr_detected, + .mmio_enabled = mpi3mr_pcierr_mmio_enabled, + .slot_reset = mpi3mr_pcierr_slot_reset, + .resume = mpi3mr_pcierr_resume, +}; + static SIMPLE_DEV_PM_OPS(mpi3mr_pm_ops, mpi3mr_suspend, mpi3mr_resume); static struct pci_driver mpi3mr_pci_driver = { @@ -5571,6 +5791,7 @@ static struct pci_driver mpi3mr_pci_driver = { .probe = mpi3mr_probe, 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