From patchwork Thu Apr 15 10:33:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viswas G X-Patchwork-Id: 423062 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 8B46CC433B4 for ; Thu, 15 Apr 2021 10:24:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6C92A613B1 for ; Thu, 15 Apr 2021 10:24:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232315AbhDOKYy (ORCPT ); Thu, 15 Apr 2021 06:24:54 -0400 Received: from esa.microchip.iphmx.com ([68.232.154.123]:51425 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232367AbhDOKYu (ORCPT ); Thu, 15 Apr 2021 06:24:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1618482268; x=1650018268; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=RHXlDWKuEQs6XxFxVWA2tELmta4o4j7fuyfenAu4v0k=; b=US9NQKdX1hm8vBhdptUSk87F8C38EHlLlvSHtu+cmKI+WxgGrW3baJz1 7rWEjgY7vUvoQ3OHmVx5Alwz9eTLrspEdH23Am8fyH25SGuE1nCEshWgx TQiP62P1RdsyqYtVgrjjvpPu+JduF+WW3shfrTXTjWWLGpvTGUHT/BNLQ jhsykp4xr7Xspy7PVtQvN6wa01zNvMHGytJmXeae+3DKKX5tT9wIYVbw9 DRGIsqik9+A5c4ifXThh5PeF2oHP0jjKYfbC+FltekNjYQpVPUmT3lZIZ rldi7eQlMSi5CJRctTeNzqA1MjmoUM9uExlX9BM6I7q4BF5XmDRGDKrpG A==; IronPort-SDR: BifSOS3SrGixlIOhPJFv72/6SIbCU2sKIaoKP9GB+40tw+76eeL4JLPYDrzz3SaNsPnEAHxpox cEPD1ZhzVN/YOy19tM+GFTOnI93xWNa9mJR4d5J+mvqDCKnXKK5EVdE6hSldz80NuBtdLwr3aT v6CsnioVqcM2Mu4zH/40Z5PeMUL5Q/jEcydeKWYfXb/VBiXMJ+1Np6f7CoXTWoR7caubBjtZLX hH4/GtQgewjGWIL5Qzff6f2KTJU0eKjmSJkFSWy7CdwO3kaZiY+q/q4/sASpRDDqVus6UGCCnK nE4= X-IronPort-AV: E=Sophos;i="5.82,223,1613458800"; d="scan'208";a="113684248" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Apr 2021 03:24:26 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 15 Apr 2021 03:24:26 -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; Thu, 15 Apr 2021 03:24:26 -0700 From: Viswas G To: CC: , , , , , , Ashokkumar N , "John Garry" , Dan Carpenter , "Martin K . Petersen" , Bart Van Assche Subject: [PATCH v4 4/8] pm80xx: Add sysfs attribute to track iop0 count Date: Thu, 15 Apr 2021 16:03:48 +0530 Message-ID: <20210415103352.3580-5-Viswas.G@microchip.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20210415103352.3580-1-Viswas.G@microchip.com> References: <20210415103352.3580-1-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 linux-9saw:~# cat /sys/class/scsi_host/host*/ctl_iop0_count 0x000000a3 0x000001db 0x000001e4 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 Acked-by: Jack Wang --- drivers/scsi/pm8001/pm8001_ctl.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c index a39cfd9d2a6b..b1c351dd2704 100644 --- a/drivers/scsi/pm8001/pm8001_ctl.c +++ b/drivers/scsi/pm8001/pm8001_ctl.c @@ -957,6 +957,27 @@ 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; + + iop0cnt = pm8001_mr32(pm8001_ha->general_stat_tbl_addr, 16); + return sysfs_emit(buf, "0x%08x\n", iop0cnt); +} +static DEVICE_ATTR_RO(ctl_iop0_count); + struct device_attribute *pm8001_host_attrs[] = { &dev_attr_interface_rev, &dev_attr_controller_fatal_error, @@ -983,6 +1004,7 @@ struct device_attribute *pm8001_host_attrs[] = { &dev_attr_ctl_mpi_state, &dev_attr_ctl_hmi_error, &dev_attr_ctl_raae_count, + &dev_attr_ctl_iop0_count, NULL, };