From patchwork Tue Jun 23 19:55:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 223214 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96FC6C433DF for ; Tue, 23 Jun 2020 21:18:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7078620702 for ; Tue, 23 Jun 2020 21:18:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592947088; bh=410oeNzgLauDo+S9APBmmqaim1aTboS4JQjuDrGEl5c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=f3s21qfgNto35X3DKugR0ynjxEtYuVIDqFfjwZsA1Okr/6pED7MJrNFtAfBUuBAzw 13ZKhALcGS1yvkpdo58j929vxrPWxvDz/bwfGP/NqggmDa0Pa8a4BIfEwWooV/JWmG LsuhFEK5hrm9Sxa87kG1yhmYCagIX762O+Z5B8CI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390627AbgFWU0N (ORCPT ); Tue, 23 Jun 2020 16:26:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:45314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390623AbgFWU0M (ORCPT ); Tue, 23 Jun 2020 16:26:12 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1096E20702; Tue, 23 Jun 2020 20:26:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592943971; bh=410oeNzgLauDo+S9APBmmqaim1aTboS4JQjuDrGEl5c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AgvRKyKzV+gHG+55CWOQNrGy8uLtZ0ax7Vvuv75gjZZ6rxKIL2tZgD+cRLLYxijTz nsPSGDsRWrjY3v+pe16OjPn72ucLJxeAdmQCgvPARbB6gXkpwWzeXsFo7HPwNL5kbE X3ebvCkbUvp+dJ+UuBY43CnMrruExFGKwiGEyRjw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marek Vasut , Andrew Murray , Lorenzo Pieralisi , Sasha Levin Subject: [PATCH 5.4 122/314] PCI: rcar: Fix incorrect programming of OB windows Date: Tue, 23 Jun 2020 21:55:17 +0200 Message-Id: <20200623195344.694112015@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623195338.770401005@linuxfoundation.org> References: <20200623195338.770401005@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Andrew Murray [ Upstream commit 2b9f217433e31d125fb697ca7974d3de3ecc3e92 ] The outbound windows (PCIEPAUR(x), PCIEPALR(x)) describe a mapping between a CPU address (which is determined by the window number 'x') and a programmed PCI address - Thus allowing the controller to translate CPU accesses into PCI accesses. However the existing code incorrectly writes the CPU address - lets fix this by writing the PCI address instead. For memory transactions, existing DT users describe a 1:1 identity mapping and thus this change should have no effect. However the same isn't true for I/O. Link: https://lore.kernel.org/r/20191004132941.6660-1-andrew.murray@arm.com Fixes: c25da4778803 ("PCI: rcar: Add Renesas R-Car PCIe driver") Tested-by: Marek Vasut Signed-off-by: Andrew Murray Signed-off-by: Lorenzo Pieralisi Reviewed-by: Marek Vasut Signed-off-by: Sasha Levin --- drivers/pci/controller/pcie-rcar.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c index 1ad0b56f11b4b..04114352d0e7b 100644 --- a/drivers/pci/controller/pcie-rcar.c +++ b/drivers/pci/controller/pcie-rcar.c @@ -335,11 +335,12 @@ static struct pci_ops rcar_pcie_ops = { }; static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie, - struct resource *res) + struct resource_entry *window) { /* Setup PCIe address space mappings for each resource */ resource_size_t size; resource_size_t res_start; + struct resource *res = window->res; u32 mask; rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win)); @@ -353,9 +354,9 @@ static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie, rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win)); if (res->flags & IORESOURCE_IO) - res_start = pci_pio_to_address(res->start); + res_start = pci_pio_to_address(res->start) - window->offset; else - res_start = res->start; + res_start = res->start - window->offset; rcar_pci_write_reg(pcie, upper_32_bits(res_start), PCIEPAUR(win)); rcar_pci_write_reg(pcie, lower_32_bits(res_start) & ~0x7F, @@ -384,7 +385,7 @@ static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) switch (resource_type(res)) { case IORESOURCE_IO: case IORESOURCE_MEM: - rcar_pcie_setup_window(i, pci, res); + rcar_pcie_setup_window(i, pci, win); i++; break; case IORESOURCE_BUS: