From patchwork Wed Feb 24 15:57:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viswas G X-Patchwork-Id: 387045 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53539C433E0 for ; Wed, 24 Feb 2021 16:10:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 120B364EDD for ; Wed, 24 Feb 2021 16:10:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234883AbhBXQK1 (ORCPT ); Wed, 24 Feb 2021 11:10:27 -0500 Received: from esa.microchip.iphmx.com ([68.232.154.123]:18228 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236741AbhBXPwC (ORCPT ); Wed, 24 Feb 2021 10:52:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1614181921; x=1645717921; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=zmLltU0OGUcdGzctbY7f7KjiWUSOh5riGeOwZXgQdyE=; b=nw9jHmIdKWhg1qC56lUnwEsD3fezUmfHs1BTHb5tycFrfUVrx6OVC9xx 4Vyu2XgMladfUieaFdzUdnbvgoZTkxXoaLQoVQnLhpjmqMKmvE3y7UJm4 qqGIPoa2tY83pUve46reIh7QwmAEijSdGZfxaPFHEFp0K2bgW99tjeKM8 z9hLzVtV3KlZgHEKhH5M83mA2C6N43aefq+gFdNWhUeGj93ExDsFZ6lIm HZSu1YdTNi7Rgei4lb9+khGLNH77EM0w2DRXS8ni4XOOlaxnkRANqtg7T rIJlpwxx1WddzesnZUpqIqbqZd/U2zjaHZKWrRHhI5E3E9/AAcXN8opl1 A==; IronPort-SDR: ZljGurdUJOwSIc6Njns+L5sgcHG+raaoCofAoEl46UmpFf5jJgaUKSVCqYezrL016/ki7AUz9O LTPZbawgLgxRcZC0WdBAWnXlQlIqA5wI/wibuCWmlD9M+oUPlD70xmlw4p4Fj7g84HdwVqcwmd 5u3U9/gI3oYTICI6+Hy4Oys8FDkgVtl6Gn5IX6ptFXFL6ThuiKGK5A1uqg09E6/saghP+X9une MAJ5Cd/hRN2yZOFIZsGbkEqxbjdB3AdLXi+f1rIAfjbxdmXqeG+LvRZxWfUkcQ8QSxHtPl0W0P oSA= X-IronPort-AV: E=Sophos;i="5.81,203,1610434800"; d="scan'208";a="107803937" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 24 Feb 2021 08:48:22 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.87.72) by chn-vm-ex02.mchp-main.com (10.10.87.72) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Wed, 24 Feb 2021 08:48:21 -0700 Received: from localhost (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Wed, 24 Feb 2021 08:48:21 -0700 From: Viswas G To: CC: , , , , , Subject: [PATCH 3/7] pm80xx: Add sysfs attribute to track iop0 count Date: Wed, 24 Feb 2021 21:27:58 +0530 Message-ID: <20210224155802.13292-4-Viswas.G@microchip.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20210224155802.13292-1-Viswas.G@microchip.com> References: <20210224155802.13292-1-Viswas.G@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Vishakha Channapattan A new sysfs variable 'ctl_iop0_count' is being introduced that tells if the controller is alive by indicating controller ticks. If on subsequent run we see the ticks changing that indicates that controller is not dead. Tested: Using 'ctl_iop0_count' sysfs variable we can see ticks incrementing mvae14:~# cat /sys/class/scsi_host/host*/ctl_iop0_count IOP0TCNT=0x000000a3 IOP0TCNT=0x000001db IOP0TCNT=0x000001e4 IOP0TCNT=0x000001e7 Signed-off-by: Vishakha Channapattan Signed-off-by: Viswas G Signed-off-by: Ruksar Devadi Signed-off-by: Ashokkumar N Signed-off-by: Radha Ramachandran --- drivers/scsi/pm8001/pm8001_ctl.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c index d415bb12718c..8470bce2cee1 100644 --- a/drivers/scsi/pm8001/pm8001_ctl.c +++ b/drivers/scsi/pm8001/pm8001_ctl.c @@ -943,6 +943,30 @@ static ssize_t ctl_raae_count_show(struct device *cdev, } static DEVICE_ATTR_RO(ctl_raae_count); +/** + * ctl_iop0_count_show - controller iop0 count check + * @cdev: pointer to embedded class device + * @buf: the buffer returned + * + * A sysfs 'read-only' shost attribute. + */ + +static ssize_t ctl_iop0_count_show(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(cdev); + struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost); + struct pm8001_hba_info *pm8001_ha = sha->lldd_ha; + unsigned int iop0cnt = 0; + int c; + + pm8001_dbg(pm8001_ha, IOCTL, "%s\n", __func__); + iop0cnt = pm8001_mr32(pm8001_ha->general_stat_tbl_addr, 16); + c = sprintf(buf, "IOP0TCNT=0x%08x\n", iop0cnt); + return c; +} +static DEVICE_ATTR_RO(ctl_iop0_count); + struct device_attribute *pm8001_host_attrs[] = { &dev_attr_interface_rev, &dev_attr_controller_fatal_error, @@ -968,6 +992,7 @@ struct device_attribute *pm8001_host_attrs[] = { &dev_attr_inc_fw_ver, &dev_attr_ctl_mpi_state, &dev_attr_ctl_raae_count, + &dev_attr_ctl_iop0_count, NULL, };