From patchwork Sat Jun 19 03:40:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12332555 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=-18.9 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 0D642C49361 for ; Sat, 19 Jun 2021 03:41:21 +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 D325761184 for ; Sat, 19 Jun 2021 03:41:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D325761184 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.145027.266875 (Exim 4.92) (envelope-from ) id 1luRr8-0001Pb-BE; Sat, 19 Jun 2021 03:41:14 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 145027.266875; Sat, 19 Jun 2021 03:41:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1luRr8-0001PU-7g; Sat, 19 Jun 2021 03:41:14 +0000 Received: by outflank-mailman (input) for mailman id 145027; Sat, 19 Jun 2021 03:41:13 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1luRr7-0001Ok-Dy for xen-devel@lists.xenproject.org; Sat, 19 Jun 2021 03:41:13 +0000 Received: from mail-pg1-x533.google.com (unknown [2607:f8b0:4864:20::533]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 6564cac7-5fb1-43f6-bec5-edb14cd76b9f; Sat, 19 Jun 2021 03:41:12 +0000 (UTC) Received: by mail-pg1-x533.google.com with SMTP id u190so5614287pgd.8 for ; Fri, 18 Jun 2021 20:41:12 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:4a46:e208:29e8:e076]) by smtp.gmail.com with UTF8SMTPSA id 25sm10160700pgp.51.2021.06.18.20.41.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 18 Jun 2021 20:41:11 -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: 6564cac7-5fb1-43f6-bec5-edb14cd76b9f 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=87F32lyNJPVTVtO+0wV8iOXVR4FYPSJ8Efeoe/l3AWY=; b=i1ENWaFNKwGMCMiAeHBUHeHeWCgJo2DMoHTJ8FYIFrvt5MmhJ7OFiSW0SvgsImDco7 eyyIqWu+/Z0bEeYC6m5AiJ1SXr0nn6NCHriX3ZUuh6wWoj4iO9mtnXQIU1hsa49/kNzW JSXwJ+CCVTQ+vErOyYxRYe6Lgoq4CUcXaMXXc= 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=87F32lyNJPVTVtO+0wV8iOXVR4FYPSJ8Efeoe/l3AWY=; b=l+iJHq5yTHS/+iZKHg0H8GhLXwM50Ks0cl0QeMdx+DceBCxxbEruAwMa7mP8rL6Srw wUET2O7hO3v0DFflS89PGm15/n+m4i1+TbQOLjylhsvwOOAtwbpdFLPNLQVoAsEQxgwA 2sijtA5/fXxqbDn8Q74zWaKWAYa2aNSp+rcpOFZILsPjMmxtZYjzt20Hn2wYWsbI7Isz eHEaLIHyzqBHcxSNDku6oR5ANg89o0286mZ+vno8Jxx2p5EDyFYYNT2//htdLlLp6Hr9 juEDv4hgOqzHCB3SQL3TJAxyrz0NBixkbA4r30+EpEodFmq9bm/Aw0mk7Qhak9J25NVh LfUA== X-Gm-Message-State: AOAM533b3hiLKpKw66gOVYq1080fWUbEMfll8pHL4/kjnrA3ga0z4Tme JmB/a0666Dwek6AWb4HntIa7fA== X-Google-Smtp-Source: ABdhPJyiBODmYapISErXaci/paTftzSQoq4G3MHhJ6blBXA4Xk2Rt3t9DUi7Q/sURCxYsvPxcPxH7g== X-Received: by 2002:a63:4915:: with SMTP id w21mr13046659pga.363.1624074072021; Fri, 18 Jun 2021 20:41:12 -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, thomas.lendacky@amd.com Subject: [PATCH v14 02/12] swiotlb: Refactor swiotlb_create_debugfs Date: Sat, 19 Jun 2021 11:40:33 +0800 Message-Id: <20210619034043.199220-3-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.288.g62a8d224e6-goog In-Reply-To: <20210619034043.199220-1-tientzu@chromium.org> References: <20210619034043.199220-1-tientzu@chromium.org> MIME-Version: 1.0 Split the debugfs creation to make the code reusable for supporting different bounce buffer pools. Signed-off-by: Claire Chang Reviewed-by: Christoph Hellwig Tested-by: Stefano Stabellini Tested-by: Will Deacon --- kernel/dma/swiotlb.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 1f9b2b9e7490..ede66df6835b 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -671,19 +671,26 @@ bool is_swiotlb_active(void) EXPORT_SYMBOL_GPL(is_swiotlb_active); #ifdef CONFIG_DEBUG_FS +static struct dentry *debugfs_dir; -static int __init swiotlb_create_debugfs(void) +static void swiotlb_create_debugfs_files(struct io_tlb_mem *mem) { - struct io_tlb_mem *mem = io_tlb_default_mem; - - if (!mem) - return 0; - mem->debugfs = debugfs_create_dir("swiotlb", NULL); 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; + + debugfs_dir = debugfs_create_dir("swiotlb", NULL); + if (mem) { + mem->debugfs = debugfs_dir; + swiotlb_create_debugfs_files(mem); + } return 0; } -late_initcall(swiotlb_create_debugfs); +late_initcall(swiotlb_create_default_debugfs); #endif