From patchwork Wed Mar 24 17:03:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viswas G X-Patchwork-Id: 408565 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=-16.6 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 69BF1C433E6 for ; Wed, 24 Mar 2021 16:55:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 395A561A15 for ; Wed, 24 Mar 2021 16:55:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236965AbhCXQyg (ORCPT ); Wed, 24 Mar 2021 12:54:36 -0400 Received: from esa.microchip.iphmx.com ([68.232.154.123]:61872 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236579AbhCXQy0 (ORCPT ); Wed, 24 Mar 2021 12:54:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1616604865; x=1648140865; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=EIZJyLxnrOGhATJFMqYZ+nDUc/0XvTP2g59cPyDlGsI=; b=NiG8M+rGPROfvJtTPlm7P4f9LSmKhcvQuVe3L4xbgGfAPmJx7PzyinAR jDRgcp7UM38ExphrofCpKVSZEOiaFoN+M9JAnn3bDQAT9OjmSO6ON1mVx uPRbO4ZgXkfcHmWFyk128HZ/iAhTIdTwoV1Sf6R+ppe9xT73w6o/cfqXw ZUCqseqj3o7rUigc7r7VB/R59/ty/Q+0gKgwy5w3MJvWjgFuT7LG1ih+x g68PwO325YyPCBqtruYQAOnz12ECehHO8P9o5ofuhmskVNlyg1HQIoQAi gFrMKvMjdrBtOIjCeQT/U8wUq+Xi9yLsWkjOzEccAZcDwUG+XEnxdMlnj g==; IronPort-SDR: 7Lm73TtHrp7TtE5B0V0/lI02xETElJSPdnMEG6Z6wvASCYRX9ubaoz2TPY5B0DhnWyBlCdBe6n mnUEteqyRS3JggnMXDrGrZF8QeHtelVJQ6IynW4W0BqTVH2TRWE1Lb7ZsrsuNwr/HqzrE4MoV+ 4oS1sdu+bc01uzJg3lYO83VDNUVa5Y9f65pJHISIsJviODjv9q1C0OTzg1uThb4LJp2C2eAhIM FoHYDLR13mOnLMMyiy2kA/JbZ7Ol41wd+gwvlePsDKApvmmPlrIdt2nQi41jd+LFuBJtCaCA6D BHs= X-IronPort-AV: E=Sophos;i="5.81,275,1610434800"; d="scan'208";a="108400588" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 24 Mar 2021 09:54:25 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 24 Mar 2021 09:54:25 -0700 Received: from localhost (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2176.2 via Frontend Transport; Wed, 24 Mar 2021 09:54:25 -0700 From: Viswas G To: CC: , , , , , , Ashokkumar N , "John Garry" Subject: [PATCH v2 4/7] pm80xx: Add sysfs attribute to track iop1 count Date: Wed, 24 Mar 2021 22:33:54 +0530 Message-ID: <20210324170357.9765-5-Viswas.G@microchip.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20210324170357.9765-1-Viswas.G@microchip.com> References: <20210324170357.9765-1-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_iop1_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_iop1_count' sysfs variable we can see ticks incrementing mvae14:~# cat /sys/class/scsi_host/host*/ctl_iop1_count 0x00000069 0x0000006b 0x0000006d 0x00000072 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 Acked-by: Jack Wang --- drivers/scsi/pm8001/pm8001_ctl.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c index b8170da49112..78d5f573eac8 100644 --- a/drivers/scsi/pm8001/pm8001_ctl.c +++ b/drivers/scsi/pm8001/pm8001_ctl.c @@ -964,6 +964,29 @@ static ssize_t ctl_iop0_count_show(struct device *cdev, } static DEVICE_ATTR_RO(ctl_iop0_count); +/** + * ctl_iop1_count_show - controller iop1 count check + * @cdev: pointer to embedded class device + * @buf: the buffer returned + * + * A sysfs 'read-only' shost attribute. + */ + +static ssize_t ctl_iop1_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 iop1cnt; + int c; + + iop1cnt = pm8001_mr32(pm8001_ha->general_stat_tbl_addr, 20); + c = sysfs_emit(buf, "0x%08x\n", iop1cnt); + return c; +} +static DEVICE_ATTR_RO(ctl_iop1_count); + struct device_attribute *pm8001_host_attrs[] = { &dev_attr_interface_rev, &dev_attr_controller_fatal_error, @@ -990,6 +1013,7 @@ struct device_attribute *pm8001_host_attrs[] = { &dev_attr_ctl_mpi_state, &dev_attr_ctl_raae_count, &dev_attr_ctl_iop0_count, + &dev_attr_ctl_iop1_count, NULL, };