From patchwork Thu Aug 19 21:56:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 12448023 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 00D45C43214 for ; Thu, 19 Aug 2021 21:57:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDDEC6109E for ; Thu, 19 Aug 2021 21:57:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236027AbhHSV6E (ORCPT ); Thu, 19 Aug 2021 17:58:04 -0400 Received: from foss.arm.com ([217.140.110.172]:47550 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235771AbhHSV55 (ORCPT ); Thu, 19 Aug 2021 17:57:57 -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 442091435; Thu, 19 Aug 2021 14:57:20 -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 ACA283F40C; Thu, 19 Aug 2021 14:57:19 -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, sdonthineni@nvidia.com, stefan.wahren@i2se.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 v2 3/4] PCI/ACPI: Add Broadcom bcm2711 MCFG quirk Date: Thu, 19 Aug 2021 16:56:54 -0500 Message-Id: <20210819215655.84866-4-jeremy.linton@arm.com> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20210819215655.84866-1-jeremy.linton@arm.com> References: <20210819215655.84866-1-jeremy.linton@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Now that there is a bcm2711 quirk, it needs to be enabled when the MCFG is missing. Use an ACPI namespace _DSD property "linux-ecam-quirk-id" as an alternative to the MCFG OEM. Signed-off-by: Jeremy Linton --- drivers/acpi/pci_mcfg.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c index 53cab975f612..4b991ee5c66c 100644 --- a/drivers/acpi/pci_mcfg.c +++ b/drivers/acpi/pci_mcfg.c @@ -169,6 +169,9 @@ static struct mcfg_fixup mcfg_quirks[] = { ALTRA_ECAM_QUIRK(1, 13), ALTRA_ECAM_QUIRK(1, 14), ALTRA_ECAM_QUIRK(1, 15), + + { "bcm2711", "", 0, 0, MCFG_BUS_ANY, &bcm2711_pcie_ops, + DEFINE_RES_MEM(0xFD500000, 0xA000) }, }; static char mcfg_oem_id[ACPI_OEM_ID_SIZE]; @@ -198,8 +201,18 @@ static void pci_mcfg_apply_quirks(struct acpi_pci_root *root, u16 segment = root->segment; struct resource *bus_range = &root->secondary; struct mcfg_fixup *f; + const char *soc; int i; + /* + * This may be a machine with a PCI/SMC conduit, which means it doesn't + * have an MCFG. Use an ACPI namespace definition instead. + */ + if (!fwnode_property_read_string(acpi_fwnode_handle(root->device), + "linux-ecam-quirk-id", &soc)) { + memcpy(mcfg_oem_id, soc, ACPI_OEM_ID_SIZE); + } + for (i = 0, f = mcfg_quirks; i < ARRAY_SIZE(mcfg_quirks); i++, f++) { if (pci_mcfg_quirk_matches(f, segment, bus_range)) { if (f->cfgres.start)