From patchwork Thu Dec 5 11:40:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiongfeng Wang X-Patchwork-Id: 1204586 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=huawei.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47TDRZ5dprz9sPL for ; Thu, 5 Dec 2019 22:45:14 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729117AbfLELpN (ORCPT ); Thu, 5 Dec 2019 06:45:13 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:6755 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729017AbfLELpN (ORCPT ); Thu, 5 Dec 2019 06:45:13 -0500 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id CEAE47D68C66BE4C2628; Thu, 5 Dec 2019 19:45:10 +0800 (CST) Received: from linux-ibm.site (10.175.102.37) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.439.0; Thu, 5 Dec 2019 19:45:03 +0800 From: Xiongfeng Wang To: CC: , , , , , Subject: [PATCH] PCI: Add quirk to disable unused BAR for hisilicon NP devices 5896 Date: Thu, 5 Dec 2019 19:40:41 +0800 Message-ID: <1575546041-50907-1-git-send-email-wangxiongfeng2@huawei.com> X-Mailer: git-send-email 1.7.12.4 MIME-Version: 1.0 X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add pci quirk for hisilicon PCI Network Processor devices 5896. The size of the unused BAR3 is set as 265T wrongly. This patch disalbes this bar. Signed-off-by: Xiongfeng Wang --- drivers/pci/quirks.c | 29 +++++++++++++++++++++++++++++ include/linux/pci_ids.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 4937a08..7dfb272 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5431,3 +5431,32 @@ static void quirk_reset_lenovo_thinkpad_p50_nvgpu(struct pci_dev *pdev) DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1, PCI_CLASS_DISPLAY_VGA, 8, quirk_reset_lenovo_thinkpad_p50_nvgpu); + +static void quirk_hisi_fixup_np_class(struct pci_dev *pdev) +{ + u32 class = pdev->class; + + pdev->class = PCI_BASE_CLASS_NETWORK << 8; + pci_info(pdev, "PCI class overriden (%#08x -> %#08x)\n", + class, pdev->class); +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HISI_5896, + quirk_hisi_fixup_np_class); + +/* + * Hisilicon NP devices 5896 BAR3 size is misreported as 256T. Actually, this + * BAR is unused, so let's disable it. + */ +#define HISI_5896_WRONG_BAR 3 +static void quirk_hisi_fixup_np_bar(struct pci_dev *pdev) +{ + struct resource *r = &pdev->resource[HISI_5896_WRONG_BAR]; + + r->start = 0; + r->end = 0; + r->flags = 0; + + pci_info(pdev, "disable BAR %d\n", HISI_5896_WRONG_BAR); +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HISI_5896, + quirk_hisi_fixup_np_bar); diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 2302d133..56e2b91 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2558,6 +2558,7 @@ #define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff #define PCI_VENDOR_ID_HUAWEI 0x19e5 +#define PCI_DEVICE_ID_HISI_5896 0x5896 /* Hisilicon NP devices 5896 */ #define PCI_VENDOR_ID_NETRONOME 0x19ee #define PCI_DEVICE_ID_NETRONOME_NFP4000 0x4000