From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4C47714A4DF; Fri, 29 Mar 2024 12:45:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711716301; cv=none; b=LAJr0aQpAvh1GHMVhis5ZayQ/zDERXzqX5RC/WdxMWtgz9e8OlGsR31cIEXkWE0cPsZAm0pnIaao/9MfW/CXx+2HjfyRR3mo3qjA3flsVQw5e+ERV+chwCJh9ictwC1ciuO+1fFyi1kZ3INwtl9ah3w3aE0p0j0aYM8nOdn+VJ8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711716301; c=relaxed/simple; bh=fbR+5U4rESsw5v4xXsfCY68N3QJWqm7u3XMhqCXZziY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iB9QeyuCz1K07bvkxgzVNB26kSfPVD3cq9YAR/yggbTcZBEGK8TwIxyAoVPhvWic2luvv4pHdWbqDSPNCXUPY40Pwhp8IOhohEsAWtILNlLKnSqzKbZs22nPSi7dNW8Aj+bLoR14n5ObWjYnkgkm/3GhT7T8Q0NDE2w8o4G24v8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KlhW2zl3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KlhW2zl3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5DB3C433C7; Fri, 29 Mar 2024 12:44:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711716301; bh=fbR+5U4rESsw5v4xXsfCY68N3QJWqm7u3XMhqCXZziY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KlhW2zl3LQ4G5ZVZngiWCpgnfnAW8DOaNOuqSh+3cr+Nj7SZU/dHvthk0df56SIwg ZY1klYrtbsknK4Jruy+H4ymABE2fm2WDrB022kAQjldnk8XY9b7xJkQIVAY6H5UQq5 3jaKsQ8KPnNcUHgQANxYdeiHQinKUHy3STxb/NHba9EzShmUgTLkZan+kJce5+N6bP YKu/JLb7nniV0EPX9WugJ+kQC34+Jxbg9c9ByN37IYIwS7wsWSaAcspT4VsRnC18Gn LWhGSGMOv40I5/m2m4JgiVNvPxox5zvQeZtGNRPd3a2RyAiQnWfKE2kqC1i966hjly eYq28wtsKWVvg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Daniel Drake , Bjorn Helgaas , Jian-Hong Pan , "Rafael J . Wysocki" , Sasha Levin , tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, linux-pci@vger.kernel.org Subject: [PATCH AUTOSEL 6.6 48/75] PCI: Disable D3cold on Asus B1400 PCI-NVMe bridge Date: Fri, 29 Mar 2024 08:42:29 -0400 Message-ID: <20240329124330.3089520-48-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240329124330.3089520-1-sashal@kernel.org> References: <20240329124330.3089520-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.23 Content-Transfer-Encoding: 8bit From: Daniel Drake [ Upstream commit cdea98bf1faef23166262825ce44648be6ebff42 ] The Asus B1400 with original shipped firmware versions and VMD disabled cannot resume from suspend: the NVMe device becomes unresponsive and inaccessible. This appears to be an untested D3cold transition by the vendor; Intel socwatch shows that Windows leaves the NVMe device and parent bridge in D0 during suspend, even though these firmware versions have StorageD3Enable=1. The NVMe device and parent PCI bridge both share the same "PXP" ACPI power resource, which gets turned off as both devices are put into D3cold during suspend. The _OFF() method calls DL23() which sets a L23E bit at offset 0xe2 into the PCI configuration space for this root port. This is the specific write that the _ON() routine is unable to recover from. This register is not documented in the public chipset datasheet. Disallow D3cold on the PCI bridge to enable successful suspend/resume. Link: https://bugzilla.kernel.org/show_bug.cgi?id=215742 Link: https://lore.kernel.org/r/20240228075316.7404-1-drake@endlessos.org Signed-off-by: Daniel Drake Signed-off-by: Bjorn Helgaas Acked-by: Jian-Hong Pan Acked-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- arch/x86/pci/fixup.c | 48 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index f347c20247d30..b33afb240601b 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -907,6 +907,54 @@ static void chromeos_fixup_apl_pci_l1ss_capability(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_save_apl_pci_l1ss_capability); DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_fixup_apl_pci_l1ss_capability); +/* + * Disable D3cold on Asus B1400 PCI-NVMe bridge + * + * On this platform with VMD off, the NVMe device cannot successfully power + * back on from D3cold. This appears to be an untested transition by the + * vendor: Windows leaves the NVMe and parent bridge in D0 during suspend. + * + * We disable D3cold on the parent bridge for simplicity, and the fact that + * both parent bridge and NVMe device share the same power resource. + * + * This is only needed on BIOS versions before 308; the newer versions flip + * StorageD3Enable from 1 to 0. + */ +static const struct dmi_system_id asus_nvme_broken_d3cold_table[] = { + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.304"), + }, + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.305"), + }, + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.306"), + }, + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.307"), + }, + }, + {} +}; + +static void asus_disable_nvme_d3cold(struct pci_dev *pdev) +{ + if (dmi_check_system(asus_nvme_broken_d3cold_table) > 0) + pci_d3cold_disable(pdev); +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x9a09, asus_disable_nvme_d3cold); + #ifdef CONFIG_SUSPEND /* * Root Ports on some AMD SoCs advertise PME_Support for D3hot and D3cold, but -- 2.43.0