From nobody Sun Feb 8 19:57:14 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 119DB1B21AD; Tue, 14 Jan 2025 17:10:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736874604; cv=none; b=Q4mekTbqquCAqg62VlOpGtJCHPsyklSti9KMJVCCReJM1G6jnplQjcgPic7mwkNmFJBTdzBkQSoIcegFe1rg374HK/Si7eSozBX7e2Rxw5soLOlAXsJJpzmOi5B2gHvMdn7OA82AheHq3mP3oktOYASRHWJWzmRDoQi5dKNzTdQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736874604; c=relaxed/simple; bh=YN6jBfVsCwubCRxSCKu0MOqOD9GhIkzGuukStgxjENU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=Dm+BHVIdRG3mlLJFYgmJW3hl99UlYlGB7oWa89vsyRXb6vGj6vO52pWFqrHWMWV3li1OKFowzxMPO7V/lR/mXy8Wq65JzcoTMjw/RcVrK4HHn/Femenl6etPj5SLVGAepK22A27mGno45uZlRlvM2ouMPnyCStZxWyaiJ5YVBrs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=LdWhSzsm; arc=none smtp.client-ip=192.198.163.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="LdWhSzsm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1736874603; x=1768410603; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=YN6jBfVsCwubCRxSCKu0MOqOD9GhIkzGuukStgxjENU=; b=LdWhSzsmFh5/rticd8iiPvXQxYGf6coVHULiwYLerLL6vnsmuvQywwBT hDRGvaqEfylqscIF4MZWy8sxpCXoiUM47044n8nYHRDMEkp6rYcvWTt0Q crjG0nyCDY6M2fgUpW1K8Gfr8YaC3XIh7qYv/gZaKmKPBpcTsa0Pl1oMc 5l9I0l5kbPQBoCHMaPLq20s+uBV8CsP6fKeUQVUAk1mH2jDohH2bvM9fJ CniidWqBsM6GtfeWYWCZCZu6xN7/6/8ij7ooHGMOhCd54FGTYN6vaC95q CcN/ZBsP8fhbkWcwYK9+/b1Wve1SnLvupiCeIi8Rcx6Bx/XMXkLyvZvLv Q==; X-CSE-ConnectionGUID: 2Ycrkd6VQkSve/5OJF07Cw== X-CSE-MsgGUID: RA87lab/RcqNh7YcmarnJA== X-IronPort-AV: E=McAfee;i="6700,10204,11315"; a="37410141" X-IronPort-AV: E=Sophos;i="6.12,314,1728975600"; d="scan'208";a="37410141" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jan 2025 09:10:03 -0800 X-CSE-ConnectionGUID: F71/uFm0R/+Gt9SGaboJ1w== X-CSE-MsgGUID: 6ESYGjbCRHaZs4B472J1ww== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="104724521" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.244.54]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jan 2025 09:09:57 -0800 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= To: Bjorn Helgaas , linux-pci@vger.kernel.org, Yazen Ghannam , Jonathan Cameron , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Lukas Wunner , Mahesh J Salgaonkar , Oliver O'Halloran , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Subject: [PATCH v9 8/8] PCI: Create helper to print TLP Header and Prefix Log Date: Tue, 14 Jan 2025 19:08:40 +0200 Message-Id: <20250114170840.1633-9-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250114170840.1633-1-ilpo.jarvinen@linux.intel.com> References: <20250114170840.1633-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Add pcie_print_tlp_log() helper to print TLP Header and Prefix Log. Print End-End Prefixes only if they are non-zero. Consolidate the few places which currently print TLP using custom formatting. The first attempt used pr_cont() instead of building a string first but it turns out pr_cont() is not compatible with pci_err() and prints on a separate line. When I asked about this, Andy Shevchenko suggested pr_cont() should not be used in the first place (to eventually get rid of it) so pr_cont() is now replaced with building the string first. Signed-off-by: Ilpo J=C3=A4rvinen Reviewed-by: Jonathan Cameron --- drivers/pci/pci.h | 2 ++ drivers/pci/pcie/aer.c | 10 ++-------- drivers/pci/pcie/dpc.c | 5 +---- drivers/pci/pcie/tlp.c | 34 ++++++++++++++++++++++++++++++++++ 4 files changed, 39 insertions(+), 12 deletions(-) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 7797b2544d00..797ad43a7683 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -553,6 +553,8 @@ void aer_print_error(struct pci_dev *dev, struct aer_er= r_info *info); int pcie_read_tlp_log(struct pci_dev *dev, int where, int where2, unsigned int tlp_len, struct pcie_tlp_log *log); unsigned int aer_tlp_log_len(struct pci_dev *dev, u32 aercc); +void pcie_print_tlp_log(const struct pci_dev *dev, + const struct pcie_tlp_log *log, const char *pfx); #endif /* CONFIG_PCIEAER */ =20 #ifdef CONFIG_PCIEPORTBUS diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 656dbf1ac45b..ece8cb88d110 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -665,12 +665,6 @@ static void pci_rootport_aer_stats_incr(struct pci_dev= *pdev, } } =20 -static void __print_tlp_header(struct pci_dev *dev, struct pcie_tlp_log *t) -{ - pci_err(dev, " TLP Header: %08x %08x %08x %08x\n", - t->dw[0], t->dw[1], t->dw[2], t->dw[3]); -} - static void __aer_print_error(struct pci_dev *dev, struct aer_err_info *info) { @@ -725,7 +719,7 @@ void aer_print_error(struct pci_dev *dev, struct aer_er= r_info *info) __aer_print_error(dev, info); =20 if (info->tlp_header_valid) - __print_tlp_header(dev, &info->tlp); + pcie_print_tlp_log(dev, &info->tlp, dev_fmt(" ")); =20 out: if (info->id && info->error_dev_num > 1 && info->id =3D=3D id) @@ -797,7 +791,7 @@ void pci_print_aer(struct pci_dev *dev, int aer_severit= y, aer->uncor_severity); =20 if (tlp_header_valid) - __print_tlp_header(dev, &aer->header_log); + pcie_print_tlp_log(dev, &aer->header_log, dev_fmt(" ")); =20 trace_aer_event(dev_name(&dev->dev), (status & ~mask), aer_severity, tlp_header_valid, &aer->header_log); diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index 0aa20bc58697..242cabd5eeeb 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -220,10 +220,7 @@ static void dpc_process_rp_pio_error(struct pci_dev *p= dev) pcie_read_tlp_log(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG, cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG, dpc_tlp_log_len(pdev), &tlp_log); - pci_err(pdev, "TLP Header: %#010x %#010x %#010x %#010x\n", - tlp_log.dw[0], tlp_log.dw[1], tlp_log.dw[2], tlp_log.dw[3]); - for (i =3D 0; i < pdev->dpc_rp_log_size - PCIE_STD_NUM_TLP_HEADERLOG - 1;= i++) - pci_err(pdev, "TLP Prefix Header: dw%d, %#010x\n", i, tlp_log.prefix[i]); + pcie_print_tlp_log(pdev, &tlp_log, dev_fmt("")); =20 if (pdev->dpc_rp_log_size < PCIE_STD_NUM_TLP_HEADERLOG + 1) goto clear_status; diff --git a/drivers/pci/pcie/tlp.c b/drivers/pci/pcie/tlp.c index 2f029deebc33..7eb88d1b37b7 100644 --- a/drivers/pci/pcie/tlp.c +++ b/drivers/pci/pcie/tlp.c @@ -6,6 +6,7 @@ */ =20 #include +#include #include #include =20 @@ -79,3 +80,36 @@ int pcie_read_tlp_log(struct pci_dev *dev, int where, in= t where2, =20 return 0; } + +#define EE_PREFIX_STR " E-E Prefixes:" + +/** + * pcie_print_tlp_log - Print TLP Header / Prefix Log contents + * @dev: PCIe device + * @log: TLP Log structure + * @pfx: String prefix + * + * Prints TLP Header and Prefix Log information held by @log. + */ +void pcie_print_tlp_log(const struct pci_dev *dev, + const struct pcie_tlp_log *log, const char *pfx) +{ + char buf[11 * (PCIE_STD_NUM_TLP_HEADERLOG + ARRAY_SIZE(log->prefix)) + + sizeof(EE_PREFIX_STR)]; + unsigned int i; + int len; + + len =3D scnprintf(buf, sizeof(buf), "%#010x %#010x %#010x %#010x", + log->dw[0], log->dw[1], log->dw[2], log->dw[3]); + + if (log->prefix[0]) + len +=3D scnprintf(buf + len, sizeof(buf) - len, EE_PREFIX_STR); + for (i =3D 0; i < ARRAY_SIZE(log->prefix); i++) { + if (!log->prefix[i]) + break; + len +=3D scnprintf(buf + len, sizeof(buf) - len, + " %#010x", log->prefix[i]); + } + + pci_err(dev, "%sTLP Header: %s\n", pfx, buf); +} --=20 2.39.5