From patchwork Fri Aug 16 16:51:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Miroshnichenko X-Patchwork-Id: 1148354 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) 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=pass (p=none dis=none) header.from=yadro.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.b="mbQk0UnP"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4698V73cg3z9sN6 for ; Sat, 17 Aug 2019 02:51:27 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727067AbfHPQvZ (ORCPT ); Fri, 16 Aug 2019 12:51:25 -0400 Received: from mta-02.yadro.com ([89.207.88.252]:51512 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727167AbfHPQvZ (ORCPT ); Fri, 16 Aug 2019 12:51:25 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 3D54C42F07; Fri, 16 Aug 2019 16:51:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1565974283; x=1567788684; bh=MAbiwKKq3JhiVTJCBwtyqDOrqyOAQ7XN/2l gdVqhXRE=; b=mbQk0UnPKP68gjKxMTOu+jfZ/UfqwDo3LuMAfjZftvljnzj5hYi aefYhz3SR9a4qGBieSG7HSNZP0Z3dbWW3AW8w9/UYw2BICEfljjcqzS1SbVjzsC4 5NR7IROaaN6/uC/Mas7GGdoCw6sCmAiK+tT+HE++K0vatNyI0PgSntpU= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6fyoRzCdLgOn; Fri, 16 Aug 2019 19:51:23 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 13F0042EEF; Fri, 16 Aug 2019 19:51:14 +0300 (MSK) Received: from NB-148.yadro.com (172.17.15.60) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Fri, 16 Aug 2019 19:51:13 +0300 From: Sergey Miroshnichenko To: , CC: Bjorn Helgaas , , Sergey Miroshnichenko , Lukas Wunner Subject: [PATCH v5 23/23] PCI: pciehp: movable BARs: Trigger a domain rescan on hp events Date: Fri, 16 Aug 2019 19:51:01 +0300 Message-ID: <20190816165101.911-24-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190816165101.911-1-s.miroshnichenko@yadro.com> References: <20190816165101.911-1-s.miroshnichenko@yadro.com> MIME-Version: 1.0 X-Originating-IP: [172.17.15.60] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org With movable BARs, adding a hotplugged device is not local to its bridge anymore, but it affects the whole domain: BARs, bridge windows and bus numbers can be substantially rearranged. So instead of trying to fit the new devices into preallocated reserved gaps, initiate a full domain rescan. The pci_rescan_bus() covers all the operations of the replaced functions: - assigning new bus numbers, as the pci_hp_add_bridge() does it; - allocating BARs (pci_assign_unassigned_bridge_resources()); - cofiguring MPS settings (pcie_bus_configure_settings()); - binding devices to their drivers (pci_bus_add_devices()). CC: Lukas Wunner Signed-off-by: Sergey Miroshnichenko --- drivers/pci/hotplug/pciehp_pci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c index d17f3bf36f70..66c4e6d88fe3 100644 --- a/drivers/pci/hotplug/pciehp_pci.c +++ b/drivers/pci/hotplug/pciehp_pci.c @@ -58,6 +58,11 @@ int pciehp_configure_device(struct controller *ctrl) goto out; } + if (pci_movable_bars_enabled()) { + pci_rescan_bus(parent); + goto out; + } + for_each_pci_bridge(dev, parent) pci_hp_add_bridge(dev);