From patchwork Thu Jul 18 09:45:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Chocron, Jonathan" X-Patchwork-Id: 11048731 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7DA4113A4 for ; Thu, 18 Jul 2019 09:46:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6DE77285BE for ; Thu, 18 Jul 2019 09:46:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 61FF7285DD; Thu, 18 Jul 2019 09:46:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DFEBA285BE for ; Thu, 18 Jul 2019 09:46:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389916AbfGRJqT (ORCPT ); Thu, 18 Jul 2019 05:46:19 -0400 Received: from smtp-fw-6002.amazon.com ([52.95.49.90]:6948 "EHLO smtp-fw-6002.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389610AbfGRJqT (ORCPT ); Thu, 18 Jul 2019 05:46:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1563443177; x=1594979177; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=m8T24ULFIcp9nPhaWsCGBuEwHGRjhFj53gyA6Z9iYKc=; b=PxcPkjmK3ySpId1/0cREEM6UoqJ3FVjTbrig0FyE+xVZwziTDMt1GXvE 0IZ5lGpJyv2dZ88+Rbwe1vZlk+4gUPxIPd7xD4knvTEE1LtInTtyBJrMq MFGSfpb4c70BdWg+kFnjRrDr3L4Gf6x7rgwRagqFkFso4Uco8lnV1a8s8 Q=; X-IronPort-AV: E=Sophos;i="5.64,276,1559520000"; d="scan'208";a="411235407" Received: from iad6-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-1e-62350142.us-east-1.amazon.com) ([10.124.125.6]) by smtp-border-fw-out-6002.iad6.amazon.com with ESMTP; 18 Jul 2019 09:46:17 +0000 Received: from EX13MTAUWA001.ant.amazon.com (iad55-ws-svc-p15-lb9-vlan3.iad.amazon.com [10.40.159.166]) by email-inbound-relay-1e-62350142.us-east-1.amazon.com (Postfix) with ESMTPS id 2FE65A2644; Thu, 18 Jul 2019 09:46:13 +0000 (UTC) Received: from EX13D13UWA001.ant.amazon.com (10.43.160.136) by EX13MTAUWA001.ant.amazon.com (10.43.160.118) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Thu, 18 Jul 2019 09:46:13 +0000 Received: from u9ff250417f405e.ant.amazon.com (10.43.162.67) by EX13D13UWA001.ant.amazon.com (10.43.160.136) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Thu, 18 Jul 2019 09:46:06 +0000 From: Jonathan Chocron To: , , , , , CC: , , , , , , , , , , , Subject: [PATCH v2 4/8] PCI: Add quirk to disable MSI-X support for Amazon's Annapurna Labs Root Port Date: Thu, 18 Jul 2019 12:45:27 +0300 Message-ID: <20190718094531.21423-5-jonnyc@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190718094531.21423-1-jonnyc@amazon.com> References: <20190718094531.21423-1-jonnyc@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.43.162.67] X-ClientProxiedBy: EX13P01UWA004.ant.amazon.com (10.43.160.127) To EX13D13UWA001.ant.amazon.com (10.43.160.136) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Root Port (identified by [1c36:0032]) doesn't support MSI-X. On some platforms it is configured to not advertise the capability at all, while on others it (mistakenly) does. This causes a panic during initialization by the pcieport driver, since it tries to configure the MSI-X capability. Specifically, when trying to access the MSI-X table a "non-existing addr" exception occurs. Example stacktrace snippet: [ 1.632363] SError Interrupt on CPU2, code 0xbf000000 -- SError [ 1.632364] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc1-Jonny-14847-ge76f1d4a1828-dirty #33 [ 1.632365] Hardware name: Annapurna Labs Alpine V3 EVP (DT) [ 1.632365] pstate: 80000005 (Nzcv daif -PAN -UAO) [ 1.632366] pc : __pci_enable_msix_range+0x4e4/0x608 [ 1.632367] lr : __pci_enable_msix_range+0x498/0x608 [ 1.632367] sp : ffffff80117db700 [ 1.632368] x29: ffffff80117db700 x28: 0000000000000001 [ 1.632370] x27: 0000000000000001 x26: 0000000000000000 [ 1.632372] x25: ffffffd3e9d8c0b0 x24: 0000000000000000 [ 1.632373] x23: 0000000000000000 x22: 0000000000000000 [ 1.632375] x21: 0000000000000001 x20: 0000000000000000 [ 1.632376] x19: ffffffd3e9d8c000 x18: ffffffffffffffff [ 1.632378] x17: 0000000000000000 x16: 0000000000000000 [ 1.632379] x15: ffffff80116496c8 x14: ffffffd3e9844503 [ 1.632380] x13: ffffffd3e9844502 x12: 0000000000000038 [ 1.632382] x11: ffffffffffffff00 x10: 0000000000000040 [ 1.632384] x9 : ffffff801165e270 x8 : ffffff801165e268 [ 1.632385] x7 : 0000000000000002 x6 : 00000000000000b2 [ 1.632387] x5 : ffffffd3e9d8c2c0 x4 : 0000000000000000 [ 1.632388] x3 : 0000000000000000 x2 : 0000000000000000 [ 1.632390] x1 : 0000000000000000 x0 : ffffffd3e9844680 [ 1.632392] Kernel panic - not syncing: Asynchronous SError Interrupt [ 1.632393] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc1-Jonny-14847-ge76f1d4a1828-dirty #33 [ 1.632394] Hardware name: Annapurna Labs Alpine V3 EVP (DT) [ 1.632394] Call trace: [ 1.632395] dump_backtrace+0x0/0x140 [ 1.632395] show_stack+0x14/0x20 [ 1.632396] dump_stack+0xa8/0xcc [ 1.632396] panic+0x140/0x334 [ 1.632397] nmi_panic+0x6c/0x70 [ 1.632398] arm64_serror_panic+0x74/0x88 [ 1.632398] __pte_error+0x0/0x28 [ 1.632399] el1_error+0x84/0xf8 [ 1.632400] __pci_enable_msix_range+0x4e4/0x608 [ 1.632400] pci_alloc_irq_vectors_affinity+0xdc/0x150 [ 1.632401] pcie_port_device_register+0x2b8/0x4e0 [ 1.632402] pcie_portdrv_probe+0x34/0xf0 Signed-off-by: Jonathan Chocron Reviewed-by: Gustavo Pimentel --- drivers/pci/quirks.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 23672680dba7..11f843aa96b3 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2925,6 +2925,21 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x10a1, quirk_msi_intx_disable_qca_bug); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0xe091, quirk_msi_intx_disable_qca_bug); + +/* + * Amazon's Annapurna Labs 1c36:0031 Root Ports don't support MSI-X, so it + * should be disabled on platforms where the device (mistakenly) advertises it. + * + * The 0031 device id is reused for other non Root Port device types, + * therefore the quirk is registered for the PCI_CLASS_BRIDGE_PCI class. + */ +static void quirk_al_msi_disable(struct pci_dev *dev) +{ + dev->no_msi = 1; + pci_warn(dev, "Disabling MSI-X\n"); +} +DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, + PCI_CLASS_BRIDGE_PCI, 8, quirk_al_msi_disable); #endif /* CONFIG_PCI_MSI */ /*