From patchwork Tue May 18 06:42:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12263809 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 406D8C433B4 for ; Tue, 18 May 2021 06:42:58 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 09BF2611BD for ; Tue, 18 May 2021 06:42:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 09BF2611BD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.128747.241663 (Exim 4.92) (envelope-from ) id 1litRL-0003Re-0V; Tue, 18 May 2021 06:42:51 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 128747.241663; Tue, 18 May 2021 06:42:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1litRK-0003RV-Si; Tue, 18 May 2021 06:42:50 +0000 Received: by outflank-mailman (input) for mailman id 128747; Tue, 18 May 2021 06:42:49 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1litRJ-0003ON-4p for xen-devel@lists.xenproject.org; Tue, 18 May 2021 06:42:49 +0000 Received: from mail-pj1-x1036.google.com (unknown [2607:f8b0:4864:20::1036]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id b04f135c-3ab3-44be-8fab-096c07fccce8; Tue, 18 May 2021 06:42:48 +0000 (UTC) Received: by mail-pj1-x1036.google.com with SMTP id g24so4970025pji.4 for ; Mon, 17 May 2021 23:42:48 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:f284:b819:54ca:c198]) by smtp.gmail.com with UTF8SMTPSA id w2sm6038009pjq.5.2021.05.17.23.42.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 May 2021 23:42:47 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: b04f135c-3ab3-44be-8fab-096c07fccce8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=sGrhy/lObEmrAUPjh232akVjdJCQ2N3TEXL4wbqFbws=; b=duRWURIb9Sx8GJHi1ThwAr2NHVUzVDJmZ2JmfALmXmR1jxNy4cEQqo3Uwkbwr8EGA5 R6coZdV6ao6m5xA8Ypmv+2VDPONe4O7NNvHSgWcMocDtkrKiWZWiU74wMPfrgeqiPT2O Tm9+7vaYlGeGJ0ngcQbAsFwROnGV4x58UiTXo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=sGrhy/lObEmrAUPjh232akVjdJCQ2N3TEXL4wbqFbws=; b=MuhhGYZvHrr73NU9b3R2CAZ+sdY6rwCMWzxnwtkgoqL7cOtOU70ItMt+U08bMRw+6g OwHwotELYEzI4DYJNaCshrrX6PEregcR4EcTsNR1wQsk1MO6qKY2Bn5noyI+JP0teiGL yeu2Gp5BDrpxix+4WBwq8xvAiKDePULXiw/oLjr/0eWelbrrPGvm+Tfau3FXFHsBvfFg Yk8/GYD/K9AI74U1ySq0kHvI80cYkzv19nJsIVaJT5OxZN5F36aY+TGNDGy//rAzERTX oNNDyr1CVdG4yK24qg/q5/a0lR8zHadSueFtjG2to1EIYw57tUzU/Gh94qHAMwqOUOAu aztw== X-Gm-Message-State: AOAM533XWFLCsNtHzHl/lMBCUde8Npl8NFynjs7CCSiBABQrZ0DBriZS TUAcj4s2Gsn39Bh+t0fAExSvxw== X-Google-Smtp-Source: ABdhPJxBFjGdNYNy2/hyDmz/8TNNMnZjFTEu3cEDsr/NePqF5IBoqi2/51M3flUXtNzSuuF0EAFgfQ== X-Received: by 2002:a17:90b:128d:: with SMTP id fw13mr1083856pjb.211.1621320167688; Mon, 17 May 2021 23:42:47 -0700 (PDT) From: Claire Chang To: Rob Herring , mpe@ellerman.id.au, Joerg Roedel , Will Deacon , Frank Rowand , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski Cc: benh@kernel.crashing.org, paulus@samba.org, "list@263.net:IOMMU DRIVERS" , sstabellini@kernel.org, Robin Murphy , grant.likely@arm.com, xypron.glpk@gmx.de, Thierry Reding , mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org, Greg KH , Saravana Kannan , "Rafael J . Wysocki" , heikki.krogerus@linux.intel.com, Andy Shevchenko , Randy Dunlap , Dan Williams , Bartosz Golaszewski , linux-devicetree , lkml , linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org, Nicolas Boichat , Jim Quinlan , tfiga@chromium.org, bskeggs@redhat.com, bhelgaas@google.com, chris@chris-wilson.co.uk, tientzu@chromium.org, daniel@ffwll.ch, airlied@linux.ie, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com, jxgao@google.com, joonas.lahtinen@linux.intel.com, linux-pci@vger.kernel.org, maarten.lankhorst@linux.intel.com, matthew.auld@intel.com, rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com Subject: [PATCH v7 02/15] swiotlb: Refactor swiotlb_create_debugfs Date: Tue, 18 May 2021 14:42:02 +0800 Message-Id: <20210518064215.2856977-3-tientzu@chromium.org> X-Mailer: git-send-email 2.31.1.751.gd2f1c929bd-goog In-Reply-To: <20210518064215.2856977-1-tientzu@chromium.org> References: <20210518064215.2856977-1-tientzu@chromium.org> MIME-Version: 1.0 Split the debugfs creation to make the code reusable for supporting different bounce buffer pools, e.g. restricted DMA pool. Signed-off-by: Claire Chang Reviewed-by: Florian Fainelli --- kernel/dma/swiotlb.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index d3232fc19385..b849b01a446f 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -64,6 +64,7 @@ enum swiotlb_force swiotlb_force; struct io_tlb_mem *io_tlb_default_mem; +static struct dentry *debugfs_dir; /* * Max segment that we can provide which (if pages are contingous) will @@ -662,18 +663,30 @@ EXPORT_SYMBOL_GPL(is_swiotlb_active); #ifdef CONFIG_DEBUG_FS -static int __init swiotlb_create_debugfs(void) +static void swiotlb_create_debugfs(struct io_tlb_mem *mem, const char *name) { - struct io_tlb_mem *mem = io_tlb_default_mem; - if (!mem) - return 0; - mem->debugfs = debugfs_create_dir("swiotlb", NULL); + return; + + mem->debugfs = debugfs_create_dir(name, debugfs_dir); debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs); debugfs_create_ulong("io_tlb_used", 0400, mem->debugfs, &mem->used); +} + +static int __init swiotlb_create_default_debugfs(void) +{ + struct io_tlb_mem *mem = io_tlb_default_mem; + + if (mem) { + swiotlb_create_debugfs(mem, "swiotlb"); + debugfs_dir = mem->debugfs; + } else { + debugfs_dir = debugfs_create_dir("swiotlb", NULL); + } + return 0; } -late_initcall(swiotlb_create_debugfs); +late_initcall(swiotlb_create_default_debugfs); #endif