From patchwork Wed Sep 13 17:07:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Abbott X-Patchwork-Id: 139085 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:612c:a8d:b0:3f2:4152:657d with SMTP id gr13csp81105vqb; Wed, 13 Sep 2023 13:56:16 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHdb7OC+cqrP5SQHEwT/WZgVmgsTjGWrQZ1E9+z1d8wkQ/lwxudeXaLdf32tQl5V9705hgU X-Received: by 2002:a05:6a00:1a14:b0:68a:31b2:5219 with SMTP id g20-20020a056a001a1400b0068a31b25219mr4129959pfv.22.1694638576610; Wed, 13 Sep 2023 13:56:16 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1694638576; cv=none; d=google.com; s=arc-20160816; b=yIq4j1zMlK+kFENpiTtk+bPW2Id546XGddX10jOfrFBEc4JTAIRuMgLyOM6lBJLG5v K3exwi8C5OUU6Gc0fT2nNsCzTiCQzi7o8qh1/ATt4kEB5NCrlQ1OpeNNVlILYuIRnGVv VMS7uLwSJTM37TXxpR2kv6vSVonPfQPQqbS+wZDbl4gGClr+KL6l4lPuR8F2xFsS+Knu yUjS8P1f1lJ7iOdPlPNHEJqqulRw3JNv//PNbqFRqEwmRh237r6Y9IFRkNq4CBkzdlbn DgQmf7Lhl2733wljIN90jSaMyxts9Q9P4lCu9KnfpPEtpFM+9fUvlL1Gtyh9kpfo25B3 WTog== 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 :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=jLIpLJ60BvEh8SAPBLAA/u5DGkIlTq0S8iTBGlhGXPg=; fh=V2IY9JiXP/LhUMpX66+Nr0N3VSfqLapXj8NIppeg0Gk=; b=wBdY/LF/WkN4i5X5TgsikAiZ67yL7JAhxcfyAWNF3TiPU6Yu0O7bw3elSNNyGqO4lF JF+GjCHhUzFSLxidMgb8F0dCjXSNpFltTSftNrGOg090LPjDqN2+rtIwlx8HNgtmuNEc SWERcLDQm8EYfZTF5o2WuTjOhZgIXCf1sT8J+j03zB20SdTXUFTWCu3SB34thqom+o0c 7OonpZzsXMt45fwnOGUrha0lSSVLs2+2IZStA8Op9ij36oOxuUXCbXL/EGyz4F35aPWb Hg6duV7kpcwrHGPf93QXiASyaXLtm16oATIi4v3uvPftECFgn52s3HkHaK2KFqn2T83b 9dGQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@mev.co.uk header.s=20221208-6x11dpa4 header.b=A2Og4qbn; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:4 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=mev.co.uk Received: from howler.vger.email (howler.vger.email. [2620:137:e000::3:4]) by mx.google.com with ESMTPS id j22-20020a056a00235600b00687008df88dsi46789pfj.52.2023.09.13.13.56.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Sep 2023 13:56:16 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:4 as permitted sender) client-ip=2620:137:e000::3:4; Authentication-Results: mx.google.com; dkim=pass header.i=@mev.co.uk header.s=20221208-6x11dpa4 header.b=A2Og4qbn; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:4 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=mev.co.uk Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by howler.vger.email (Postfix) with ESMTP id 25EA281129B7; Wed, 13 Sep 2023 10:08:04 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at howler.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230444AbjIMRH6 (ORCPT + 35 others); Wed, 13 Sep 2023 13:07:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231286AbjIMRHp (ORCPT ); Wed, 13 Sep 2023 13:07:45 -0400 Received: from smtp115.iad3a.emailsrvr.com (smtp115.iad3a.emailsrvr.com [173.203.187.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 234811BE4 for ; Wed, 13 Sep 2023 10:07:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mev.co.uk; s=20221208-6x11dpa4; t=1694624854; bh=JgtIYmwmV6xYy/QUX+4Tkq/fmp98+9vB4JgNe0IQwNA=; h=From:To:Subject:Date:From; b=A2Og4qbnBND7NV5B9mvFsrIz/09mMXpRlPFsbcoOSb6iR+HXm5ano8s9YpoW5182M t5P63jFv8mcbooqgWOFlKvCvcwaoR8/niSdeaZylNJCG6vGtp3XQIQ+8yF1nVQ985h UAbbaEieNfGbHnr7Vwqh8LHGFZuXxoFOnafK9vD8= X-Auth-ID: abbotti@mev.co.uk Received: by smtp39.relay.iad3a.emailsrvr.com (Authenticated sender: abbotti-AT-mev.co.uk) with ESMTPSA id 3270C54E5; Wed, 13 Sep 2023 13:07:33 -0400 (EDT) From: Ian Abbott To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ian Abbott , H Hartley Sweeten , Arnd Bergmann , Niklas Schnelle Subject: [PATCH v3 09/13] comedi: ni_mio_common: Conditionally use I/O port or MMIO Date: Wed, 13 Sep 2023 18:07:08 +0100 Message-Id: <20230913170712.111719-10-abbotti@mev.co.uk> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230913170712.111719-1-abbotti@mev.co.uk> References: <20230913164013.107520-1-abbotti@mev.co.uk> <20230913170712.111719-1-abbotti@mev.co.uk> MIME-Version: 1.0 X-Classification-ID: 19793052-af61-4898-a406-82596fa230be-10-1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (howler.vger.email [0.0.0.0]); Wed, 13 Sep 2023 10:08:04 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1776943405693878580 X-GMAIL-MSGID: 1776957339817268085 In a future patch, the port I/O functions (`inb()`, `outb()`, and friends will only be declared in the `HAS_IOPORT` configuration option is enabled. The "ni_mio_common.c" file contains calls to both port I/O functions and memory-mapped I/O functions. The file is `#include`d by "ni_atmio.c", "ni_mio_cs.c", and "ni_pcimio.c" for the ni_atmio, ni_mio_cs, and ni_pcimio modules, respectively. Only "ni_pcimio.c" defines the `PCIDMA` macro before including "ni_mio_common.c" and various bits of code in "ni_mio_common.c" is conditionally compiled according to whether that macro is defined or not. Currently, the port I/O function calls are compiled in regardless of whether the `PCIDMA` macro is defined or not. However, the fact is that the ni_atmio and ni_mio_cs modules will never call the memory-mapped I/O functions, and the ni_pcimio module will never call the port I/O functions. Calls to the port I/O and memory-mapped I/O functions is confined to the `ni_writel()`, `ni_writew()`, `ni_writeb()`, `ni_readl()`, `ni_readw()`, and `ni_readb()` functions which do a run-time test to decide whether to call the port I/O functions or the memory-mapped I/O functions. Conditionally compile two variants of the functions so they only call the port I/O functions if the `PCIDMA` macro is undefined (for the ni_atmio and ni_mio_cs modules), and only call the memory-mapped I/O functions if the `PCIDMA` macro is defined (for the ni_pcimio module). Add a run-time check in the `ni_E_init()` function to return an error if the comedi device has been set up to use port I/O if `PCIDMA` is defined, or has been set up to use memory-mapped I/O if `PCIDMA` is not defined. The changes make it possible to build the ni_pcimio module even if the port I/O functions have not been declared. (The ni_atmio and ni_mio_cs modules do still require the port I/O functions to be declared.) Cc: Arnd Bergmann Cc: Niklas Schnelle Signed-off-by: Ian Abbott --- v2: N/A. v3: Add missing `---` divider before patch changelog. --- drivers/comedi/drivers/ni_mio_common.c | 70 ++++++++++++++++++-------- 1 file changed, 50 insertions(+), 20 deletions(-) diff --git a/drivers/comedi/drivers/ni_mio_common.c b/drivers/comedi/drivers/ni_mio_common.c index 638be08b43e4..980f309d6de7 100644 --- a/drivers/comedi/drivers/ni_mio_common.c +++ b/drivers/comedi/drivers/ni_mio_common.c @@ -46,6 +46,12 @@ #include #include "mite.h" +#ifdef PCIDMA +#define IS_PCIMIO 1 +#else +#define IS_PCIMIO 0 +#endif + /* A timeout count */ #define NI_TIMEOUT 1000 @@ -219,54 +225,72 @@ enum timebase_nanoseconds { static const int num_adc_stages_611x = 3; +#ifdef PCIDMA + static void ni_writel(struct comedi_device *dev, unsigned int data, int reg) { - if (dev->mmio) - writel(data, dev->mmio + reg); - else - outl(data, dev->iobase + reg); + writel(data, dev->mmio + reg); } static void ni_writew(struct comedi_device *dev, unsigned int data, int reg) { - if (dev->mmio) - writew(data, dev->mmio + reg); - else - outw(data, dev->iobase + reg); + writew(data, dev->mmio + reg); } static void ni_writeb(struct comedi_device *dev, unsigned int data, int reg) { - if (dev->mmio) - writeb(data, dev->mmio + reg); - else - outb(data, dev->iobase + reg); + writeb(data, dev->mmio + reg); } static unsigned int ni_readl(struct comedi_device *dev, int reg) { - if (dev->mmio) - return readl(dev->mmio + reg); + return readl(dev->mmio + reg); +} + +static unsigned int ni_readw(struct comedi_device *dev, int reg) +{ + return readw(dev->mmio + reg); +} + +static unsigned int ni_readb(struct comedi_device *dev, int reg) +{ + return readb(dev->mmio + reg); +} +#else /* PCIDMA */ + +static void ni_writel(struct comedi_device *dev, unsigned int data, int reg) +{ + outl(data, dev->iobase + reg); +} + +static void ni_writew(struct comedi_device *dev, unsigned int data, int reg) +{ + outw(data, dev->iobase + reg); +} + +static void ni_writeb(struct comedi_device *dev, unsigned int data, int reg) +{ + outb(data, dev->iobase + reg); +} + +static unsigned int ni_readl(struct comedi_device *dev, int reg) +{ return inl(dev->iobase + reg); } static unsigned int ni_readw(struct comedi_device *dev, int reg) { - if (dev->mmio) - return readw(dev->mmio + reg); - return inw(dev->iobase + reg); } static unsigned int ni_readb(struct comedi_device *dev, int reg) { - if (dev->mmio) - return readb(dev->mmio + reg); - return inb(dev->iobase + reg); } +#endif /* PCIDMA */ + /* * We automatically take advantage of STC registers that can be * read/written directly in the I/O space of the board. @@ -5977,6 +6001,12 @@ static int ni_E_init(struct comedi_device *dev, int i; const char *dev_family = devpriv->is_m_series ? "ni_mseries" : "ni_eseries"; + if (!IS_PCIMIO != !dev->mmio) { + dev_err(dev->class_dev, + "%s: bug! %s device not supported.\n", + KBUILD_MODNAME, board->name); + return -ENXIO; + } /* prepare the device for globally-named routes. */ if (ni_assign_device_routes(dev_family, board->name,