Received: by 2002:a05:6358:4e97:b0:b3:742d:4702 with SMTP id ce23csp2883928rwb; Mon, 15 Aug 2022 13:16:14 -0700 (PDT) X-Google-Smtp-Source: AA6agR4luw5Y0ds3CbBSH3LoK1D2g73P3NtDube8zURCNzg1diNVka9RQWESsIRx+5PsW9t2ebTq X-Received: by 2002:a05:6402:1771:b0:43d:3fab:dd73 with SMTP id da17-20020a056402177100b0043d3fabdd73mr15847966edb.136.1660594574723; Mon, 15 Aug 2022 13:16:14 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1660594574; cv=none; d=google.com; s=arc-20160816; b=s+ffAAqBTG7fzVRMHixqZ5hOIANqZX5sN0NDKfKykXgBGdmWmLeQPcYmhiicODmWaQ SHaVgPZxZGA8Twz4njSFfdCWHoT0Mc/h13+sFi8rX9MhfCOh53QN4q01PLK0gtFlclYD agh0iuMUy8aVQYrM7UVKn9/uVLwS/kFD5Uxfeaflvkf+7hJzGUwoNakm8KNcZ8mFaKq0 K6M0w8AL91Ri22b/nBeiTy1zv2+U5lSRyyCxrrJDYfWruUms8ShDJhmjcmMo58xmQPOA 6baK5OSNuSe1gEJ96DVdvnq6P61UI5MW7h9HfltFIhz0GHllf3LNTnCzKlNSNrLR/Gdm 3UBA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :user-agent:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=baJpcMfAhQtxh/EyViMS27pERCkEYlH5goIRBHhuFRI=; b=kF6s62pF0ptS9UpoCHbRDt+eGPCQBRHlFu1G+rRu6ok5p6PyJoZ21izOBF4pnyo52M MHhKgYuYgLGssKRNfom+AARUvRsAG65b/tIGNvBYNZ5kLSNuFKSFV2xOJSL5jMOv9c2R Vm/Ns872xcJTsvwnJ4bw9jltox6ZIM8UcwIz4f6JJQx9phdMOHbKPHxSjzUbd96OX9Ok uDurl7aQP9ifzyCAyPryw8A5FOauaoNyulK991dlSCy+sxOWyAi44CWCSI5AA2pUK9Fs x+hUSGcdYAm9bnX+hR3KLe1THgfoTpF0cozDedCOoc0Yh4/Cxbo/TtOwMdGnNCIxxS0/ A2RQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=oHglkbO9; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id p17-20020a056402075100b004381b6af19csi8042889edy.155.2022.08.15.13.15.49; Mon, 15 Aug 2022 13:16:14 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=oHglkbO9; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245295AbiHOTkT (ORCPT + 99 others); Mon, 15 Aug 2022 15:40:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245340AbiHOThF (ORCPT ); Mon, 15 Aug 2022 15:37:05 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67BD731352; Mon, 15 Aug 2022 11:46:21 -0700 (PDT) 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 sin.source.kernel.org (Postfix) with ESMTPS id D5B04CE1272; Mon, 15 Aug 2022 18:46:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3167C433D6; Mon, 15 Aug 2022 18:46:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660589178; bh=lh8PcIV0OaoKHeruMeGTWcF3pMbyWXtMi/lOW9qra2M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oHglkbO9B16tyJyQYAsockMTw+mkXTBAOvYT7lCWRGJ7Qjq+ZkzUbeFHoFYgUpHbY fVzbwmaKxE0Sn3Nhyhwqk9FSwl7S4JbvylWuPDWgQBT8zkWEce/T6oH36RXPLJxrN+ T2T+TPLQIpwuHPw7Ftrg/qFt0E8RjkAp5Hlw4h+M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Pali=20Roh=C3=A1r?= , Michael Ellerman , Sasha Levin Subject: [PATCH 5.15 638/779] powerpc/pci: Prefer PCI domain assignment via DT linux,pci-domain and alias Date: Mon, 15 Aug 2022 20:04:42 +0200 Message-Id: <20220815180404.617595407@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180337.130757997@linuxfoundation.org> References: <20220815180337.130757997@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pali Rohár [ Upstream commit 0fe1e96fef0a5c53b4c0d1500d356f3906000f81 ] Other Linux architectures use DT property 'linux,pci-domain' for specifying fixed PCI domain of PCI controller specified in Device-Tree. And lot of Freescale powerpc boards have defined numbered pci alias in Device-Tree for every PCIe controller which number specify preferred PCI domain. So prefer usage of DT property 'linux,pci-domain' (via function of_get_pci_domain_nr()) and DT pci alias (via function of_alias_get_id()) on powerpc architecture for assigning PCI domain to PCI controller. Fixes: 63a72284b159 ("powerpc/pci: Assign fixed PHB number based on device-tree properties") Signed-off-by: Pali Rohár Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220706102148.5060-2-pali@kernel.org Signed-off-by: Sasha Levin --- arch/powerpc/kernel/pci-common.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index c3573430919d..08eea633c380 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -74,16 +74,30 @@ void set_pci_dma_ops(const struct dma_map_ops *dma_ops) static int get_phb_number(struct device_node *dn) { int ret, phb_id = -1; - u32 prop_32; u64 prop; /* * Try fixed PHB numbering first, by checking archs and reading - * the respective device-tree properties. Firstly, try powernv by - * reading "ibm,opal-phbid", only present in OPAL environment. + * the respective device-tree properties. Firstly, try reading + * standard "linux,pci-domain", then try reading "ibm,opal-phbid" + * (only present in powernv OPAL environment), then try device-tree + * alias and as the last try to use lower bits of "reg" property. */ - ret = of_property_read_u64(dn, "ibm,opal-phbid", &prop); + ret = of_get_pci_domain_nr(dn); + if (ret >= 0) { + prop = ret; + ret = 0; + } + if (ret) + ret = of_property_read_u64(dn, "ibm,opal-phbid", &prop); + if (ret) + ret = of_alias_get_id(dn, "pci"); + if (ret >= 0) { + prop = ret; + ret = 0; + } if (ret) { + u32 prop_32; ret = of_property_read_u32_index(dn, "reg", 1, &prop_32); prop = prop_32; } @@ -95,10 +109,7 @@ static int get_phb_number(struct device_node *dn) if ((phb_id >= 0) && !test_and_set_bit(phb_id, phb_bitmap)) return phb_id; - /* - * If not pseries nor powernv, or if fixed PHB numbering tried to add - * the same PHB number twice, then fallback to dynamic PHB numbering. - */ + /* If everything fails then fallback to dynamic PHB numbering. */ phb_id = find_first_zero_bit(phb_bitmap, MAX_PHBS); BUG_ON(phb_id >= MAX_PHBS); set_bit(phb_id, phb_bitmap); -- 2.35.1