From patchwork Tue Apr 11 12:28:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 9675109 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 86D5860234 for ; Tue, 11 Apr 2017 12:31:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 72EF32852B for ; Tue, 11 Apr 2017 12:31:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 679CD2852E; Tue, 11 Apr 2017 12:31:03 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D51E32852B for ; Tue, 11 Apr 2017 12:31:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=RhE0KlFDx1+xd0ECd5Y/GJmac98jqrP1AF2P5qZ11wU=; b=SsIlzjpzQGV04eqEQO+NeFCYpo 6u4Ohn2ZyLwEdtKRhyUlRSVlDYOfpw/dA/ZaWZQEJGDvK+cZrVhcTx5Vp0+VIOQu3CAho1/vwYr42 uv++0mW6/a36Ws0gRNJTzd4A62laLJsavU8abQK7T1k1i0L/7xBiP3/PLoPU7hZgksIJmuT7eZWVM gCvLJ8l/3wbOEibW+5NJOacffsZlHtuKFUtfPF/Db3Vtq/XS7Zk4KN2T/w3p5ioWvnly5PLvZjde5 PBPQj0qskTAzXiAtLIugoiFDP0S5aI/WJCXxby263mRZm33vYDPKfO+GfzWPMgVBjGmtgmdfUJin6 kcMolziQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cxuwo-0001LC-2n; Tue, 11 Apr 2017 12:31:02 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cxuvm-0006Gn-5d for linux-arm-kernel@lists.infradead.org; Tue, 11 Apr 2017 12:30:02 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 11C431AC1; Tue, 11 Apr 2017 05:29:53 -0700 (PDT) Received: from red-moon.cambridge.arm.com (red-moon.cambridge.arm.com [10.1.206.55]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id DFA523F23B; Tue, 11 Apr 2017 05:29:51 -0700 (PDT) From: Lorenzo Pieralisi To: linux-pci@vger.kernel.org Subject: [PATCH v3 13/32] m68k: include default ioremap_nopost() implementation Date: Tue, 11 Apr 2017 13:28:53 +0100 Message-Id: <20170411122923.6285-14-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 2.10.0 In-Reply-To: <20170411122923.6285-1-lorenzo.pieralisi@arm.com> References: <20170411122923.6285-1-lorenzo.pieralisi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170411_052958_461424_BA82606F X-CRM114-Status: UNSURE ( 8.12 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Lorenzo Pieralisi , linux-kernel@vger.kernel.org, Geert Uytterhoeven , Bjorn Helgaas , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The PCI specifications (Rev 3.0, 3.2.5 "Transaction Ordering and Posting") mandate non-posted configuration transactions. As further highlighted in the PCIe specifications (4.0 - Rev0.3, "Ordering Considerations for the Enhanced Configuration Access Mechanism"), through ECAM and ECAM-derivative configuration mechanism, the memory mapped transactions from the host CPU into Configuration Requests on the PCI express fabric may create ordering problems for software because writes to memory address are typically posted transactions (unless the architecture can enforce through virtual address mapping non-posted write transactions behaviour) but writes to Configuration Space are not posted on the PCI express fabric. Include the asm-generic ioremap_nopost() implementation (currently falling back to ioremap_nocache()) to provide a non-posted writes ioremap interface to kernel subsystems. Signed-off-by: Lorenzo Pieralisi Cc: Bjorn Helgaas Cc: Geert Uytterhoeven --- arch/m68k/include/asm/io.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/m68k/include/asm/io.h b/arch/m68k/include/asm/io.h index bccd5a9..ce39ee5 100644 --- a/arch/m68k/include/asm/io.h +++ b/arch/m68k/include/asm/io.h @@ -3,6 +3,7 @@ #else #include #endif +#include #define readb_relaxed(addr) readb(addr) #define readw_relaxed(addr) readw(addr)