From patchwork Sun Jun 11 17:19:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Maciej W. Rozycki" X-Patchwork-Id: 1793624 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4QfM552GzKz20Ww for ; Mon, 12 Jun 2023 03:19:53 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4QfM535J38z30PP for ; Mon, 12 Jun 2023 03:19:51 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=orcam.me.uk (client-ip=2001:4190:8020::34; helo=angie.orcam.me.uk; envelope-from=macro@orcam.me.uk; receiver=lists.ozlabs.org) Received: from angie.orcam.me.uk (angie.orcam.me.uk [IPv6:2001:4190:8020::34]) by lists.ozlabs.org (Postfix) with ESMTP id 4QfM4N43wbz2ytS for ; Mon, 12 Jun 2023 03:19:16 +1000 (AEST) Received: by angie.orcam.me.uk (Postfix, from userid 500) id 0EA1A9200B4; Sun, 11 Jun 2023 19:19:15 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id 0B5499200B3; Sun, 11 Jun 2023 18:19:15 +0100 (BST) Date: Sun, 11 Jun 2023 18:19:14 +0100 (BST) From: "Maciej W. Rozycki" To: Bjorn Helgaas , Mahesh J Salgaonkar , Oliver O'Halloran , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Saeed Mahameed , Leon Romanovsky , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Subject: [PATCH v9 01/14] PCI: pciehp: Rely on `link_active_reporting' In-Reply-To: Message-ID: References: User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Pali_Roh=C3=A1r?= , David Abdurachmanov , linux-rdma@vger.kernel.org, Mika Westerberg , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Alex Williamson , Lukas Wunner , linux-pci@vger.kernel.org, Stefan Roese , Jim Wilson , netdev@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Use `link_active_reporting' to determine whether Data Link Layer Link Active Reporting is available rather than re-retrieving the capability. Signed-off-by: Maciej W. Rozycki Reviewed-by: Lukas Wunner --- NB this has been compile-tested only with PPC64LE and x86-64 configurations. No change from v8. Changes from v7: - Add Reviewed-by: tag by Lukas Wunner. - Reorder from 6/7. No change from v6. New change in v6. --- drivers/pci/hotplug/pciehp_hpc.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) linux-pcie-link-active-reporting-hpc.diff Index: linux-macro/drivers/pci/hotplug/pciehp_hpc.c =================================================================== --- linux-macro.orig/drivers/pci/hotplug/pciehp_hpc.c +++ linux-macro/drivers/pci/hotplug/pciehp_hpc.c @@ -984,7 +984,7 @@ static inline int pcie_hotplug_depth(str struct controller *pcie_init(struct pcie_device *dev) { struct controller *ctrl; - u32 slot_cap, slot_cap2, link_cap; + u32 slot_cap, slot_cap2; u8 poweron; struct pci_dev *pdev = dev->port; struct pci_bus *subordinate = pdev->subordinate; @@ -1030,9 +1030,6 @@ struct controller *pcie_init(struct pcie if (dmi_first_match(inband_presence_disabled_dmi_table)) ctrl->inband_presence_disabled = 1; - /* Check if Data Link Layer Link Active Reporting is implemented */ - pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap); - /* Clear all remaining event bits in Slot Status register. */ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD | @@ -1051,7 +1048,7 @@ struct controller *pcie_init(struct pcie FLAG(slot_cap, PCI_EXP_SLTCAP_EIP), FLAG(slot_cap, PCI_EXP_SLTCAP_NCCS), FLAG(slot_cap2, PCI_EXP_SLTCAP2_IBPD), - FLAG(link_cap, PCI_EXP_LNKCAP_DLLLARC), + FLAG(pdev->link_active_reporting, true), pdev->broken_cmd_compl ? " (with Cmd Compl erratum)" : ""); /*