From patchwork Thu Jun 20 10:51:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandrakanth patil X-Patchwork-Id: 11006447 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D2E1B1398 for ; Thu, 20 Jun 2019 10:52:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C40B22864E for ; Thu, 20 Jun 2019 10:52:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B7F4B28650; Thu, 20 Jun 2019 10:52:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5CB4827528 for ; Thu, 20 Jun 2019 10:52:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731359AbfFTKw7 (ORCPT ); Thu, 20 Jun 2019 06:52:59 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:35493 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726211AbfFTKw6 (ORCPT ); Thu, 20 Jun 2019 06:52:58 -0400 Received: by mail-pf1-f194.google.com with SMTP id d126so1466481pfd.2 for ; Thu, 20 Jun 2019 03:52:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=mveVJiAznNjg5E86Wj26dh5RZ/LgPI6cFDk8lk8GhzU=; b=N3pk1BWWw5IJvi8/mjwazahI2kpJ1xAiyPtSi7AzppmkFa39q9mltv74u/WXXjqQJc /H+IkvWFfTgcm76NLfqGc2e9/mQPEFFd4yrBaneUiJcSbIfVOY++WNSV/TynTTDnJwhe 7dtDOX1rTfJGiEcCbAOLCkq++sH12o3nYrSwU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=mveVJiAznNjg5E86Wj26dh5RZ/LgPI6cFDk8lk8GhzU=; b=jeyx0kgj8fzSjVxMt7e8Ew9oGZW3nTa/x5Vyio/Q4bq3T5pu6YHRtMdV6RCxmKyOMY o+Gt7vqVnes7nqIGhjB4FEsiXZxVKz+5IZXbsoLYsaXhPoO8lPscUhZENfqNNKTBiiqa LlSMCk23OTPa5aLaaHCoLL/ENVpRS4MgxXlOd5Xz+BHqPQuhD3UwbRkm/6nlzo2cAUR2 E1JxRbfAln5dXrXSKBtuH93yWjQGFF3wiz8nLhyujRz3P1QrOcfpSMjXn8ikT8O8nJ2H jgT9gGdjqdDELF7jlJlFAILMyHMtl0YfyuO6oqtpPU/uewZIVEm/HpW5Kyo8q3bzu/Qr EV1A== X-Gm-Message-State: APjAAAXDiAmEYtjtU6DJ6tK4QYHu08tja0e1CFrt90bbBRx0GmKYdAK6 A7dS1HGzF4Y46T2ZNjLZFjci4pt2Ks/t+pBf5Yx8JjhUOk/g3H1Tk9Y1Ef6CvZOBC1uaO4SaTaC iQg5+dMxUDwru5znx7tTh+Nb3cPxS7Mmh3eO2h5Pt/D6k8qAkG2+MLR9XNlUE/ljYcT0p5XwqPg Eqx7AYDslOiOmxGdM= X-Google-Smtp-Source: APXvYqwQ6Xqj50qqLLoKl3hcRp/XdxvGJcf++VUOkwisFn+sqDTvSoY82kJbugTHZmJgrOboSv9Ezw== X-Received: by 2002:a62:e511:: with SMTP id n17mr119775257pff.181.1561027977751; Thu, 20 Jun 2019 03:52:57 -0700 (PDT) Received: from dhcp-10-123-20-30.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id l7sm24793995pfl.9.2019.06.20.03.52.54 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 20 Jun 2019 03:52:57 -0700 (PDT) From: Chandrakanth Patil To: linux-scsi@vger.kernel.org Cc: kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, kiran-kumar.kasturi@broadcom.com, sankar.patra@broadcom.com, sasikumar.pc@broadcom.com, shivasharan.srikanteshwara@broadcom.com, Chandrakanth Patil Subject: [PATCH v2 06/18] megaraid_sas: In probe context, retry IOC INIT once if firmware is in fault Date: Thu, 20 Jun 2019 16:21:56 +0530 Message-Id: <20190620105208.15011-7-chandrakanth.patil@broadcom.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20190620105208.15011-1-chandrakanth.patil@broadcom.com> References: <20190620105208.15011-1-chandrakanth.patil@broadcom.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Issue: Under certain conditions, controller goes in FAULT state after IOC INIT fired to firmware. Such Fault can be recovered through controller reset. Fix: In driver probe context, if firmware fault is observed post IOC INIT, driver would do controller reset followed by retry logic for IOC INIT command. Signed-off-by: Shivasharan S Signed-off-by: Chandrakanth Patil --- drivers/scsi/megaraid/megaraid_sas_fusion.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index b8a5bbf..2e711b1 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -1009,6 +1009,7 @@ wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd, { int i; struct megasas_header *frame_hdr = &cmd->frame->hdr; + u32 status_reg; u32 msecs = seconds * 1000; @@ -1018,6 +1019,12 @@ wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd, for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) { rmb(); msleep(20); + if (!(i % 5000)) { + status_reg = instance->instancet->read_fw_status_reg(instance) + & MFI_STATE_MASK; + if (status_reg == MFI_STATE_FAULT) + break; + } } if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS) @@ -1720,6 +1727,7 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) struct fusion_context *fusion; u32 scratch_pad_1; int i = 0, count; + u32 status_reg; fusion = instance->ctrl_context; @@ -1802,8 +1810,21 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) if (megasas_alloc_cmds_fusion(instance)) goto fail_alloc_cmds; - if (megasas_ioc_init_fusion(instance)) - goto fail_ioc_init; + if (megasas_ioc_init_fusion(instance)) { + status_reg = instance->instancet->read_fw_status_reg(instance); + if (((status_reg & MFI_STATE_MASK) == MFI_STATE_FAULT) && + (status_reg & MFI_RESET_ADAPTER)) { + /* Do a chip reset and then retry IOC INIT once */ + if (megasas_adp_reset_wait_for_ready + (instance, true, 0) == FAILED) + goto fail_ioc_init; + + if (megasas_ioc_init_fusion(instance)) + goto fail_ioc_init; + } else { + goto fail_ioc_init; + } + } megasas_display_intel_branding(instance); if (megasas_get_ctrl_info(instance)) {