From patchwork Thu Aug 5 21:11:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 12422161 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 63139C4320A for ; Thu, 5 Aug 2021 21:12:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3A0306113C for ; Thu, 5 Aug 2021 21:12:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241801AbhHEVMV (ORCPT ); Thu, 5 Aug 2021 17:12:21 -0400 Received: from foss.arm.com ([217.140.110.172]:52374 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231587AbhHEVMU (ORCPT ); Thu, 5 Aug 2021 17:12:20 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9BEE31042; Thu, 5 Aug 2021 14:12:05 -0700 (PDT) Received: from u200856.usa.arm.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0BB833F719; Thu, 5 Aug 2021 14:12:05 -0700 (PDT) From: Jeremy Linton To: linux-pci@vger.kernel.org Cc: lorenzo.pieralisi@arm.com, nsaenz@kernel.org, bhelgaas@google.com, rjw@rjwysocki.net, lenb@kernel.org, robh@kernel.org, kw@linux.com, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jeremy Linton Subject: [PATCH 0/3] CM4 ACPI PCIe quirk Date: Thu, 5 Aug 2021 16:11:57 -0500 Message-Id: <20210805211200.491275-1-jeremy.linton@arm.com> X-Mailer: git-send-email 2.26.3 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The PFTF CM4 is an ACPI platform that is following the PCIe SMCCC standard because its PCIe config space isn't ECAM compliant and is split into two parts. One part for the root port registers and a moveable window which points at a given device's 4K config space. Thus it doesn't have a MCFG (and really any MCFG provided would be nonsense anyway). As linux doesn't support the PCIe SMCCC standard we key off a linux specific host bridge _DSD to add custom ECAM ops and cfgres. The cfg op selects between those two regions, as well as disallowing problematic accesses, particularly if the link is down because there isn't an attached device. Jeremy Linton (3): PCI: brcmstb: Break register definitions into separate header PCI: brcmstb: Add ACPI config space quirk PCI/ACPI: Add new quirk detection, enable bcm2711 drivers/acpi/pci_mcfg.c | 14 ++ drivers/pci/controller/Makefile | 1 + drivers/pci/controller/pcie-brcmstb-acpi.c | 77 +++++++++ drivers/pci/controller/pcie-brcmstb.c | 179 +------------------- drivers/pci/controller/pcie-brcmstb.h | 182 +++++++++++++++++++++ include/linux/pci-ecam.h | 1 + 6 files changed, 276 insertions(+), 178 deletions(-) create mode 100644 drivers/pci/controller/pcie-brcmstb-acpi.c create mode 100644 drivers/pci/controller/pcie-brcmstb.h