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: 12263745 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 ABBB6C43600 for ; Tue, 18 May 2021 06:42:50 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 6E74760240 for ; Tue, 18 May 2021 06:42:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6E74760240 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 95A976E955; Tue, 18 May 2021 06:42:49 +0000 (UTC) Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0FDA56E955 for ; Tue, 18 May 2021 06:42:48 +0000 (UTC) Received: by mail-pj1-x1029.google.com with SMTP id gc22-20020a17090b3116b02901558435aec1so989170pjb.4 for ; Mon, 17 May 2021 23:42:48 -0700 (PDT) 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=rJOmpUBbMNEEqZIN1gvKKBMDAW8RYIZTevizu8puItzote3gZbRCCxoaYIEU5OTVFF 4+/KL6s67/CxVXmYcplnCofkDILXpIS3cuuo2EWIQrA9rvLnqBifLCaMcGhgbqEeS7B2 jVF4nXO0i0eenKOL1HnOg24HuQPY0IcN08DlYv9zSUz+hwdgADok2AHlKRb1rM8yWZ+y lL32wPez1ac/sKaJW7ryT4IHCUUOacyCf6VSqW02wq+vp94pU5TxDzizv6JIQtt8VtsN GLhOneY4O2EoEsHXVDbfQGO8QQZsYFIwuBo3eTTuO14WKgXuO4bxmDn28+qzvLUHaU3C CIdA== X-Gm-Message-State: AOAM533wPJZd+l4XsexGGYGLheuedtIkh9+8+kNLPaWrWZi6qN1nGe9y g+ONZDtmgk8sOXDsSgDR6uk7Gw== 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) 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) 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 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 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, mingo@kernel.org, jxgao@google.com, sstabellini@kernel.org, Saravana Kannan , xypron.glpk@gmx.de, "Rafael J . Wysocki" , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , airlied@linux.ie, Robin Murphy , Nicolas Boichat , rodrigo.vivi@intel.com, bhelgaas@google.com, tientzu@chromium.org, Dan Williams , Andy Shevchenko , Greg KH , Randy Dunlap , lkml , tfiga@chromium.org, "list@263.net:IOMMU DRIVERS" , Jim Quinlan , linuxppc-dev@lists.ozlabs.org, bauerman@linux.ibm.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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