From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F105C61DA3 for ; Fri, 3 Mar 2023 23:22:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229447AbjCCXWT (ORCPT ); Fri, 3 Mar 2023 18:22:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229471AbjCCXWT (ORCPT ); Fri, 3 Mar 2023 18:22:19 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1CD465469; Fri, 3 Mar 2023 15:22:17 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3BB8B61941; Fri, 3 Mar 2023 21:46:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F3569C4339E; Fri, 3 Mar 2023 21:46:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1677880014; bh=EoYuMau1ceIpjX5tjDs5OAnfLOA35rNSG5SWqpHEXn4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UGVXnYwRGHerx+JkvsaHlSiSgAli3IQY8tf/1LgqUmo8/w/K8h/nYA/vuUwdrMI0v bl7ZNbKuZEDsunMW24UH+Ikzx/4PnZNaNoM9uJ8U3hAYUbohuU2gOpkWCCsATxYFgY C2OXQJRiHyHMWbqMoL7L4GeGlfuH4GFnov5WYniU7o5iNpFukBnAD+FsYDTbvfHhV9 TUngDjkGKtr8twcyfQIeAwH1u8sWVhv/QvGz80oZcmHbuQZ4nlylFuECKwyXkmtEOl omrSMP8yGojHuGZ6rWtfq5ati9wKpv4pSCEZBd6sm9ZIfUWxzsSe3FEsIGy9H53rfj l8+5ZlYxuHuUg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mika Westerberg , Bjorn Helgaas , Sasha Levin , linux-pci@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 37/50] PCI: Align extra resources for hotplug bridges properly Date: Fri, 3 Mar 2023 16:45:18 -0500 Message-Id: <20230303214531.1450154-37-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230303214531.1450154-1-sashal@kernel.org> References: <20230303214531.1450154-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mika Westerberg [ Upstream commit 08f0a15ee8adb4846b08ca5d5c175fbf0f652bc9 ] After division the extra resource space per hotplug bridge may not be aligned according to the window alignment, so align it before passing it down for further distribution. Link: https://lore.kernel.org/r/20230131092405.29121-2-mika.westerberg@linux.intel.com Signed-off-by: Mika Westerberg Signed-off-by: Bjorn Helgaas Signed-off-by: Sasha Levin --- drivers/pci/setup-bus.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 2ce636937c6ea..4a6b698b5dd10 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -2004,6 +2004,7 @@ static void pci_bus_distribute_available_resources(struct pci_bus *bus, * resource space between hotplug bridges. */ for_each_pci_bridge(dev, bus) { + struct resource *res; struct pci_bus *b; b = dev->subordinate; @@ -2015,16 +2016,28 @@ static void pci_bus_distribute_available_resources(struct pci_bus *bus, * hotplug-capable downstream ports taking alignment into * account. */ - io.end = io.start + io_per_hp - 1; - mmio.end = mmio.start + mmio_per_hp - 1; - mmio_pref.end = mmio_pref.start + mmio_pref_per_hp - 1; + res = &dev->resource[PCI_BRIDGE_IO_WINDOW]; + align = pci_resource_alignment(dev, res); + io.end = align ? io.start + ALIGN_DOWN(io_per_hp, align) - 1 + : io.start + io_per_hp - 1; + + res = &dev->resource[PCI_BRIDGE_MEM_WINDOW]; + align = pci_resource_alignment(dev, res); + mmio.end = align ? mmio.start + ALIGN_DOWN(mmio_per_hp, align) - 1 + : mmio.start + mmio_per_hp - 1; + + res = &dev->resource[PCI_BRIDGE_PREF_MEM_WINDOW]; + align = pci_resource_alignment(dev, res); + mmio_pref.end = align ? mmio_pref.start + + ALIGN_DOWN(mmio_pref_per_hp, align) - 1 + : mmio_pref.start + mmio_pref_per_hp - 1; pci_bus_distribute_available_resources(b, add_list, io, mmio, mmio_pref); - io.start += io_per_hp; - mmio.start += mmio_per_hp; - mmio_pref.start += mmio_pref_per_hp; + io.start += io.end + 1; + mmio.start += mmio.end + 1; + mmio_pref.start += mmio_pref.end + 1; } } -- 2.39.2