From patchwork Wed Aug 21 23:15:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajat Jain X-Patchwork-Id: 1151192 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="dorlkDOY"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46DNmw3Wt8z9s3Z for ; Thu, 22 Aug 2019 09:15:28 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731360AbfHUXP1 (ORCPT ); Wed, 21 Aug 2019 19:15:27 -0400 Received: from mail-pf1-f201.google.com ([209.85.210.201]:37110 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731358AbfHUXP1 (ORCPT ); Wed, 21 Aug 2019 19:15:27 -0400 Received: by mail-pf1-f201.google.com with SMTP id w30so2653524pfj.4 for ; Wed, 21 Aug 2019 16:15:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=uPz28r4pp6bS4pf4oimcoF6Q5mHSemPcex9edLQ7rcQ=; b=dorlkDOYvSJeySUiRXM6PkXCXwTRDM7mnmbA+VYnhUwpZlhThUp0gCiSA2/wi9oP1A 1pJu0BG97YuMJRyHe0mbD7PDMKHHzscOW1r/bnaaY8E/qRtH7+oqB5RjSUqU/5IGrthl DPLmYqj20Zh2hl/Zf3G4IeX6sgtJHfYF9nrl73lHQF/k5of0ywoo5aYgyDQYA06z+BPq oaVZZGVWEqHys50Zjxg+0QWa8m6i0wW76+7EZe3NSGnew/cdto6FTPRMQ+pB0pRJ/Dgr etaMaPgUtAxwyXRn215N/O8HI151kv49Sr38mDz5ZU9ElQEpOAO0f4Spc48M35u8pfpz Rq2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=uPz28r4pp6bS4pf4oimcoF6Q5mHSemPcex9edLQ7rcQ=; b=mNUQMUJXritnQ+vxxTH396AQBEuFTR9I6gfK7W4UWf19h/zC806g3xaWYfWPVAKbuS bR/06mGpyOYouwYU6+vRKrZqiFvjxWV8ohAtG3lO+WWiNavaH6PxgDXOwtTNpvfdK7Nn In1B+l1G4tqUMqZKAioSsuDD8GeU3KlhV1lRgrtl1WAsOXYdDWDE1XqQSQIdswr+hhzC nJIQjLpPbgdiEHu7T0lTk2kEfYhpbzryLUBXaHUIQ19Ufqlfu/ohcKuGZaBi3ceF+E6L HgFAiZtlviOAzNPikBGPE1dz2B2W6wkI2EEzZAOcf5piYayqgB8HGoZd9TnfCTyjXeGZ S+6w== X-Gm-Message-State: APjAAAXUYa6eYpqDzgJIfUUQTFq+r7gGIRzoE7yFSknOcq/pvxxBtRWd hRYfKM1aVh/iLaO0rtacK/Kn91o4qe2d X-Google-Smtp-Source: APXvYqyVaCgjWGyolNEhMURfAYyYlFKy2b2EOlRXDUI9OZMSZqpLW9+nyfqREU+EhTJWpdPd7DWps/cw6DM8 X-Received: by 2002:a63:2a41:: with SMTP id q62mr25091848pgq.444.1566429325943; Wed, 21 Aug 2019 16:15:25 -0700 (PDT) Date: Wed, 21 Aug 2019 16:15:13 -0700 In-Reply-To: <20190821231513.36454-1-rajatja@google.com> Message-Id: <20190821231513.36454-2-rajatja@google.com> Mime-Version: 1.0 References: <20190821231513.36454-1-rajatja@google.com> X-Mailer: git-send-email 2.23.0.rc1.153.gdeed80330f-goog Subject: [PATCH 2/2] PCI/AER: Split the AER stats into multiple sysfs attributes From: Rajat Jain To: gregkh@linuxfoundation.com, Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Rajat Jain , rajatxjain@gmail.com Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Split the AER stats into multiple sysfs atributes. Note that this changes the ABI of the AER stats, but hopefully, there aren't active users that need to change. This is how the AERs are being exposed now: localhost /sys/devices/pci0000:00/0000:00:1c.0/aer_stats # ls -l total 0 -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit0_RxErr -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit12_Timeout -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit13_NonFatalErr -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit14_CorrIntErr -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit15_HeaderOF -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit6_BadTLP -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit7_BadDLLP -r--r--r--. 1 root root 4096 Aug 20 16:35 correctable_bit8_Rollover -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit0_Undefined -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit12_TLP -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit13_FCP -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit14_CmpltTO -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit15_CmpltAbrt -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit16_UnxCmplt -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit17_RxOF -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit18_MalfTLP -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit19_ECRC -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit20_UnsupReq -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit21_ACSViol -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit22_UncorrIntErr -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit23_BlockedTLP -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit24_AtomicOpBlocked -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit25_TLPBlockedErr -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit26_PoisonTLPBlocked -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit4_DLP -r--r--r--. 1 root root 4096 Aug 20 16:35 fatal_bit5_SDES -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit0_Undefined -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit12_TLP -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit13_FCP -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit14_CmpltTO -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit15_CmpltAbrt -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit16_UnxCmplt -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit17_RxOF -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit18_MalfTLP -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit19_ECRC -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit20_UnsupReq -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit21_ACSViol -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit22_UncorrIntErr -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit23_BlockedTLP -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit24_AtomicOpBlocked -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit25_TLPBlockedErr -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit26_PoisonTLPBlocked -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit4_DLP -r--r--r--. 1 root root 4096 Aug 20 16:35 nonfatal_bit5_SDES -r--r--r--. 1 root root 4096 Aug 20 16:35 total_device_err_cor -r--r--r--. 1 root root 4096 Aug 20 16:35 total_device_err_fatal -r--r--r--. 1 root root 4096 Aug 20 16:35 total_device_err_nonfatal -r--r--r--. 1 root root 4096 Aug 20 16:35 total_rootport_err_cor -r--r--r--. 1 root root 4096 Aug 20 16:35 total_rootport_err_fatal -r--r--r--. 1 root root 4096 Aug 20 16:35 total_rootport_err_nonfatal localhost /sys/devices/pci0000:00/0000:00:1c.0/aer_stats # Each file is has a single counter value. Single file containing all stats was frowned upon and discussed here: https://lkml.org/lkml/2019/6/28/220 Signed-off-by: Rajat Jain --- I personally think that this makes it a little overwhelming for a human, e.g. I could look at total but don't exactly know while file to look at next in order to drill down. But I couldn't think of any other way. Some problems I'd have liked to fix but they require deeper surgery: * Now each PCI device sysfs node will have a sub-directory called aer_stats. (The subdirectory will have attributes only if it supports AER, but the sub directory will always be present). * This patch isn't re-using the strings array like it was using earlier. I thought of adding the attribute group at run time, so it will take care of both the problems, but can only do that after device_add() call, I think. If we are comfortable introducing a call to a new function pci_aer_stats_init() after call to device_add() in in pci_device_add(), the above problems can be fixed. drivers/pci/pcie/aer.c | 166 +++++++++++++++++++++++++++++------------ 1 file changed, 119 insertions(+), 47 deletions(-) diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 68060a290291..11f3158cfdf5 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -570,42 +570,66 @@ static const char *aer_agent_string[] = { "Transmitter ID" }; -#define aer_stats_dev_attr(name, stats_array, strings_array, \ - total_string, total_field) \ +#define aer_stats_dev_attr(type, bitnum, stats_array, name) \ static ssize_t \ - name##_show(struct device *dev, struct device_attribute *attr, \ - char *buf) \ + type##_bit##bitnum##_##name##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ { \ - unsigned int i; \ - char *str = buf; \ struct pci_dev *pdev = to_pci_dev(dev); \ - u64 *stats = pdev->aer_stats->stats_array; \ - \ - for (i = 0; i < ARRAY_SIZE(strings_array); i++) { \ - if (strings_array[i]) \ - str += sprintf(str, "%s %llu\n", \ - strings_array[i], stats[i]); \ - else if (stats[i]) \ - str += sprintf(str, #stats_array "_bit[%d] %llu\n",\ - i, stats[i]); \ - } \ - str += sprintf(str, "TOTAL_%s %llu\n", total_string, \ - pdev->aer_stats->total_field); \ - return str-buf; \ + return sprintf(buf, "%llu\n", \ + pdev->aer_stats->stats_array[bitnum]); \ } \ -static DEVICE_ATTR_RO(name) - -aer_stats_dev_attr(aer_dev_correctable, dev_cor_errs, - aer_correctable_error_string, "ERR_COR", - dev_total_cor_errs); -aer_stats_dev_attr(aer_dev_fatal, dev_fatal_errs, - aer_uncorrectable_error_string, "ERR_FATAL", - dev_total_fatal_errs); -aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs, - aer_uncorrectable_error_string, "ERR_NONFATAL", - dev_total_nonfatal_errs); - -#define aer_stats_rootport_attr(name, field) \ +static DEVICE_ATTR_RO(type##_bit##bitnum##_##name) + +aer_stats_dev_attr(correctable, 0, dev_cor_errs, RxErr); +aer_stats_dev_attr(correctable, 6, dev_cor_errs, BadTLP); +aer_stats_dev_attr(correctable, 7, dev_cor_errs, BadDLLP); +aer_stats_dev_attr(correctable, 8, dev_cor_errs, Rollover); +aer_stats_dev_attr(correctable, 12, dev_cor_errs, Timeout); +aer_stats_dev_attr(correctable, 13, dev_cor_errs, NonFatalErr); +aer_stats_dev_attr(correctable, 14, dev_cor_errs, CorrIntErr); +aer_stats_dev_attr(correctable, 15, dev_cor_errs, HeaderOF); + +aer_stats_dev_attr(fatal, 0, dev_fatal_errs, Undefined); +aer_stats_dev_attr(fatal, 4, dev_fatal_errs, DLP); +aer_stats_dev_attr(fatal, 5, dev_fatal_errs, SDES); +aer_stats_dev_attr(fatal, 12, dev_fatal_errs, TLP); +aer_stats_dev_attr(fatal, 13, dev_fatal_errs, FCP); +aer_stats_dev_attr(fatal, 14, dev_fatal_errs, CmpltTO); +aer_stats_dev_attr(fatal, 15, dev_fatal_errs, CmpltAbrt); +aer_stats_dev_attr(fatal, 16, dev_fatal_errs, UnxCmplt); +aer_stats_dev_attr(fatal, 17, dev_fatal_errs, RxOF); +aer_stats_dev_attr(fatal, 18, dev_fatal_errs, MalfTLP); +aer_stats_dev_attr(fatal, 19, dev_fatal_errs, ECRC); +aer_stats_dev_attr(fatal, 20, dev_fatal_errs, UnsupReq); +aer_stats_dev_attr(fatal, 21, dev_fatal_errs, ACSViol); +aer_stats_dev_attr(fatal, 22, dev_fatal_errs, UncorrIntErr); +aer_stats_dev_attr(fatal, 23, dev_fatal_errs, BlockedTLP); +aer_stats_dev_attr(fatal, 24, dev_fatal_errs, AtomicOpBlocked); +aer_stats_dev_attr(fatal, 25, dev_fatal_errs, TLPBlockedErr); +aer_stats_dev_attr(fatal, 26, dev_fatal_errs, PoisonTLPBlocked); + +aer_stats_dev_attr(nonfatal, 0, dev_nonfatal_errs, Undefined); +aer_stats_dev_attr(nonfatal, 4, dev_nonfatal_errs, DLP); +aer_stats_dev_attr(nonfatal, 5, dev_nonfatal_errs, SDES); +aer_stats_dev_attr(nonfatal, 12, dev_nonfatal_errs, TLP); +aer_stats_dev_attr(nonfatal, 13, dev_nonfatal_errs, FCP); +aer_stats_dev_attr(nonfatal, 14, dev_nonfatal_errs, CmpltTO); +aer_stats_dev_attr(nonfatal, 15, dev_nonfatal_errs, CmpltAbrt); +aer_stats_dev_attr(nonfatal, 16, dev_nonfatal_errs, UnxCmplt); +aer_stats_dev_attr(nonfatal, 17, dev_nonfatal_errs, RxOF); +aer_stats_dev_attr(nonfatal, 18, dev_nonfatal_errs, MalfTLP); +aer_stats_dev_attr(nonfatal, 19, dev_nonfatal_errs, ECRC); +aer_stats_dev_attr(nonfatal, 20, dev_nonfatal_errs, UnsupReq); +aer_stats_dev_attr(nonfatal, 21, dev_nonfatal_errs, ACSViol); +aer_stats_dev_attr(nonfatal, 22, dev_nonfatal_errs, UncorrIntErr); +aer_stats_dev_attr(nonfatal, 23, dev_nonfatal_errs, BlockedTLP); +aer_stats_dev_attr(nonfatal, 24, dev_nonfatal_errs, AtomicOpBlocked); +aer_stats_dev_attr(nonfatal, 25, dev_nonfatal_errs, TLPBlockedErr); +aer_stats_dev_attr(nonfatal, 26, dev_nonfatal_errs, PoisonTLPBlocked); + +#define aer_stats_total_attr(name, field) \ static ssize_t \ name##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ @@ -615,20 +639,67 @@ aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs, } \ static DEVICE_ATTR_RO(name) -aer_stats_rootport_attr(aer_rootport_total_err_cor, - rootport_total_cor_errs); -aer_stats_rootport_attr(aer_rootport_total_err_fatal, - rootport_total_fatal_errs); -aer_stats_rootport_attr(aer_rootport_total_err_nonfatal, - rootport_total_nonfatal_errs); +aer_stats_total_attr(total_device_err_cor, dev_total_cor_errs); +aer_stats_total_attr(total_device_err_fatal, dev_total_fatal_errs); +aer_stats_total_attr(total_device_err_nonfatal, dev_total_nonfatal_errs); +aer_stats_total_attr(total_rootport_err_cor, rootport_total_cor_errs); +aer_stats_total_attr(total_rootport_err_fatal, rootport_total_fatal_errs); +aer_stats_total_attr(total_rootport_err_nonfatal, rootport_total_nonfatal_errs); static struct attribute *aer_stats_attrs[] __ro_after_init = { - &dev_attr_aer_dev_correctable.attr, - &dev_attr_aer_dev_fatal.attr, - &dev_attr_aer_dev_nonfatal.attr, - &dev_attr_aer_rootport_total_err_cor.attr, - &dev_attr_aer_rootport_total_err_fatal.attr, - &dev_attr_aer_rootport_total_err_nonfatal.attr, + &dev_attr_correctable_bit0_RxErr.attr, + &dev_attr_correctable_bit6_BadTLP.attr, + &dev_attr_correctable_bit7_BadDLLP.attr, + &dev_attr_correctable_bit8_Rollover.attr, + &dev_attr_correctable_bit12_Timeout.attr, + &dev_attr_correctable_bit13_NonFatalErr.attr, + &dev_attr_correctable_bit14_CorrIntErr.attr, + &dev_attr_correctable_bit15_HeaderOF.attr, + + &dev_attr_fatal_bit0_Undefined.attr, + &dev_attr_fatal_bit4_DLP.attr, + &dev_attr_fatal_bit5_SDES.attr, + &dev_attr_fatal_bit12_TLP.attr, + &dev_attr_fatal_bit13_FCP.attr, + &dev_attr_fatal_bit14_CmpltTO.attr, + &dev_attr_fatal_bit15_CmpltAbrt.attr, + &dev_attr_fatal_bit16_UnxCmplt.attr, + &dev_attr_fatal_bit17_RxOF.attr, + &dev_attr_fatal_bit18_MalfTLP.attr, + &dev_attr_fatal_bit19_ECRC.attr, + &dev_attr_fatal_bit20_UnsupReq.attr, + &dev_attr_fatal_bit21_ACSViol.attr, + &dev_attr_fatal_bit22_UncorrIntErr.attr, + &dev_attr_fatal_bit23_BlockedTLP.attr, + &dev_attr_fatal_bit24_AtomicOpBlocked.attr, + &dev_attr_fatal_bit25_TLPBlockedErr.attr, + &dev_attr_fatal_bit26_PoisonTLPBlocked.attr, + + &dev_attr_nonfatal_bit0_Undefined.attr, + &dev_attr_nonfatal_bit4_DLP.attr, + &dev_attr_nonfatal_bit5_SDES.attr, + &dev_attr_nonfatal_bit12_TLP.attr, + &dev_attr_nonfatal_bit13_FCP.attr, + &dev_attr_nonfatal_bit14_CmpltTO.attr, + &dev_attr_nonfatal_bit15_CmpltAbrt.attr, + &dev_attr_nonfatal_bit16_UnxCmplt.attr, + &dev_attr_nonfatal_bit17_RxOF.attr, + &dev_attr_nonfatal_bit18_MalfTLP.attr, + &dev_attr_nonfatal_bit19_ECRC.attr, + &dev_attr_nonfatal_bit20_UnsupReq.attr, + &dev_attr_nonfatal_bit21_ACSViol.attr, + &dev_attr_nonfatal_bit22_UncorrIntErr.attr, + &dev_attr_nonfatal_bit23_BlockedTLP.attr, + &dev_attr_nonfatal_bit24_AtomicOpBlocked.attr, + &dev_attr_nonfatal_bit25_TLPBlockedErr.attr, + &dev_attr_nonfatal_bit26_PoisonTLPBlocked.attr, + + &dev_attr_total_device_err_cor.attr, + &dev_attr_total_device_err_fatal.attr, + &dev_attr_total_device_err_nonfatal.attr, + &dev_attr_total_rootport_err_cor.attr, + &dev_attr_total_rootport_err_fatal.attr, + &dev_attr_total_rootport_err_nonfatal.attr, NULL }; @@ -641,9 +712,9 @@ static umode_t aer_stats_attrs_are_visible(struct kobject *kobj, if (!pdev->aer_stats) return 0; - if ((a == &dev_attr_aer_rootport_total_err_cor.attr || - a == &dev_attr_aer_rootport_total_err_fatal.attr || - a == &dev_attr_aer_rootport_total_err_nonfatal.attr) && + if ((a == &dev_attr_total_rootport_err_cor.attr || + a == &dev_attr_total_rootport_err_fatal.attr || + a == &dev_attr_total_rootport_err_nonfatal.attr) && pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT) return 0; @@ -651,6 +722,7 @@ static umode_t aer_stats_attrs_are_visible(struct kobject *kobj, } const struct attribute_group aer_stats_attr_group = { + .name = "aer_stats", .attrs = aer_stats_attrs, .is_visible = aer_stats_attrs_are_visible, };