From patchwork Fri Jan 5 16:45:50 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Bryant G. Ly" X-Patchwork-Id: 10146775 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D115C6034B for ; Fri, 5 Jan 2018 16:47:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BD46528537 for ; Fri, 5 Jan 2018 16:47:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B1F1128604; Fri, 5 Jan 2018 16:47:11 +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=-6.9 required=2.0 tests=BAYES_00,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 5375D28537 for ; Fri, 5 Jan 2018 16:47:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751593AbeAEQrH (ORCPT ); Fri, 5 Jan 2018 11:47:07 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36342 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752248AbeAEQqv (ORCPT ); Fri, 5 Jan 2018 11:46:51 -0500 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w05Gi8F3033701 for ; Fri, 5 Jan 2018 11:46:50 -0500 Received: from e13.ny.us.ibm.com (e13.ny.us.ibm.com [129.33.205.203]) by mx0b-001b2d01.pphosted.com with ESMTP id 2fa984jyb3-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 05 Jan 2018 11:46:50 -0500 Received: from localhost by e13.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 5 Jan 2018 11:46:49 -0500 Received: from b01cxnp23034.gho.pok.ibm.com (9.57.198.29) by e13.ny.us.ibm.com (146.89.104.200) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Fri, 5 Jan 2018 11:46:45 -0500 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w05Gkj9T45547736; Fri, 5 Jan 2018 16:46:45 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 659372803D; Fri, 5 Jan 2018 11:46:11 -0500 (EST) Received: from localhost.localdomain (unknown [9.85.199.208]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP id 2F7BF2803E; Fri, 5 Jan 2018 11:46:10 -0500 (EST) From: "Bryant G. Ly" To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au Cc: seroyer@linux.vnet.ibm.com, jjalvare@linux.vnet.ibm.com, alex.williamson@redhat.com, helgaas@kernel.org, aik@ozlabs.ru, ruscur@russell.cc, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, bodong@mellanox.com, eli@mellanox.com, saeedm@mellanox.com, "Bryant G. Ly" Subject: [PATCH v4 5/7] powerpc/kernel: Add EEH notify resume sysfs Date: Fri, 5 Jan 2018 10:45:50 -0600 X-Mailer: git-send-email 2.14.3 (Apple Git-98) In-Reply-To: <20180105164552.36371-1-bryantly@linux.vnet.ibm.com> References: <20180105164552.36371-1-bryantly@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18010516-0008-0000-0000-000002BA06FF X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008325; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000244; SDB=6.00970672; UDB=6.00491634; IPR=6.00750642; BA=6.00005765; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00018892; XFM=3.00000015; UTC=2018-01-05 16:46:49 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18010516-0009-0000-0000-000037CC7F03 Message-Id: <20180105164552.36371-6-bryantly@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-01-05_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1801050235 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce a method for notify resume to be called from sysfs. In this patch one can now call notify resume from sysfs when is supported by platform. Signed-off-by: Bryant G. Ly Signed-off-by: Juan J. Alvarez --- arch/powerpc/kernel/eeh_sysfs.c | 45 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/arch/powerpc/kernel/eeh_sysfs.c b/arch/powerpc/kernel/eeh_sysfs.c index 797549289798..9c513abc102c 100644 --- a/arch/powerpc/kernel/eeh_sysfs.c +++ b/arch/powerpc/kernel/eeh_sysfs.c @@ -90,6 +90,38 @@ static ssize_t eeh_pe_state_store(struct device *dev, static DEVICE_ATTR_RW(eeh_pe_state); +#ifdef CONFIG_PCI_IOV +static ssize_t eeh_notify_resume_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); + struct pci_dn *pdn = pci_get_pdn(pdev); + + if (!edev || !edev->pe) + return -ENODEV; + + pdn = pci_get_pdn(pdev); + return sprintf(buf, "%d\n", pdn->last_allow_rc); +} + +static ssize_t eeh_notify_resume_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); + + if (!edev || !edev->pe) + return -ENODEV; + + if (eeh_ops->notify_resume(pci_get_pdn(pdev))) + return -EIO; + return count; +} +static DEVICE_ATTR_RW(eeh_notify_resume); +#endif + void eeh_sysfs_add_device(struct pci_dev *pdev) { struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); @@ -105,6 +137,13 @@ void eeh_sysfs_add_device(struct pci_dev *pdev) rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr); rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_state); +#ifdef CONFIG_PCI_IOV + if (of_get_property(pci_device_to_OF_node + ((pdev->is_physfn ? pdev : pdev->physfn)), + "ibm,is-open-sriov-pf", NULL)) + rc += device_create_file(&pdev->dev, + &dev_attr_eeh_notify_resume); +#endif if (rc) pr_warn("EEH: Unable to create sysfs entries\n"); else if (edev) @@ -128,6 +167,12 @@ void eeh_sysfs_remove_device(struct pci_dev *pdev) device_remove_file(&pdev->dev, &dev_attr_eeh_mode); device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr); device_remove_file(&pdev->dev, &dev_attr_eeh_pe_state); +#ifdef CONFIG_PCI_IOV + if (of_get_property(pci_device_to_OF_node + ((pdev->is_physfn ? pdev : pdev->physfn)), + "ibm,is-open-sriov-pf", NULL)) + device_remove_file(&pdev->dev, &dev_attr_eeh_notify_resume); +#endif if (edev) edev->mode &= ~EEH_DEV_SYSFS;