From patchwork Fri Jun 11 15:26:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12315997 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, 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 38E3BC48BD1 for ; Fri, 11 Jun 2021 15:27:40 +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 066D4611AE for ; Fri, 11 Jun 2021 15:27:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 066D4611AE 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.140418.259472 (Exim 4.92) (envelope-from ) id 1lrj4I-0008J4-2H; Fri, 11 Jun 2021 15:27:34 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 140418.259472; Fri, 11 Jun 2021 15:27:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lrj4H-0008It-V6; Fri, 11 Jun 2021 15:27:33 +0000 Received: by outflank-mailman (input) for mailman id 140418; Fri, 11 Jun 2021 15:27:32 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lrj4G-0008HP-5z for xen-devel@lists.xenproject.org; Fri, 11 Jun 2021 15:27:32 +0000 Received: from mail-pj1-x1030.google.com (unknown [2607:f8b0:4864:20::1030]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 5f0b04a3-6f21-4efd-98a3-a9fc29516775; Fri, 11 Jun 2021 15:27:31 +0000 (UTC) Received: by mail-pj1-x1030.google.com with SMTP id o17-20020a17090a9f91b029015cef5b3c50so6030754pjp.4 for ; Fri, 11 Jun 2021 08:27:31 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:33c8:8e01:1161:6797]) by smtp.gmail.com with UTF8SMTPSA id fs10sm10781936pjb.31.2021.06.11.08.27.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Jun 2021 08:27:30 -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: 5f0b04a3-6f21-4efd-98a3-a9fc29516775 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=POwdGvWH9uF6GuFYGDpfWh3gBTCdeay2Nuv62kz+670=; b=C9jITNUpsFL469uBCWw+ylcEXmDJHC24qGoWeq47lXmwrDoiFy9SQ+nYUnDf9eoUhJ UQMk8xg5DYQsIoGnRwISCRXEWnbFfVNYAqeVla6v7rlivkLs9OCXtvoP8+LC1h0SWDED 3sRx2R1OhX94fVL71OHRWyugi7Thhky5EB+DQ= 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=POwdGvWH9uF6GuFYGDpfWh3gBTCdeay2Nuv62kz+670=; b=UZ5JLewqqqqIftpNwr9/BuC9ZZgMqHQRNQGbf3JT0HcUbYynZr2IXpdWGG5lvW9TW7 ntfC9+a4sRGsZfTabIVSvl639MDolgTwAkOILESnfxcf+KFLR6Pw1OcPRyDU2nwb1pid Qaivod7QYMGydLliIVTdpl+qH/5/Z9DitO8wVhDFVe25ltnOU0A7ptPKDDbEt/G2aBlS kMAvpiM1wFjJKoinPsumI4TGhRONwwkXgDLOJarzrPVhXjf9HZ49q6w8JuZZwY+Jl84W KO121uaMrt61gXXApFHGw44Uhdx7EjMIkN8a7pNSYLyrGnDYciVEMo7IOzc0/pC5lmFM Kx4w== X-Gm-Message-State: AOAM531unb8tM0HGj93UOteyAeCgILyQu8PO0ARp4hvr6YY8oUPI1bAY vtMFbc5ofR9HZlcq7P+QvrgdYw== X-Google-Smtp-Source: ABdhPJye589iRfRWyEdkeIKw72OE8rv2dNVWo6QIa4VZn02HOM9CDAmVKp9644S+z7efQaweuHXMtA== X-Received: by 2002:a17:90a:7bce:: with SMTP id d14mr5098913pjl.38.1623425250808; Fri, 11 Jun 2021 08:27:30 -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 v9 02/14] swiotlb: Refactor swiotlb_create_debugfs Date: Fri, 11 Jun 2021 23:26:47 +0800 Message-Id: <20210611152659.2142983-3-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.272.g935e593368-goog In-Reply-To: <20210611152659.2142983-1-tientzu@chromium.org> References: <20210611152659.2142983-1-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: Christoph Hellwig --- kernel/dma/swiotlb.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 1a1208c81e85..8a3e2b3b246d 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -64,6 +64,9 @@ enum swiotlb_force swiotlb_force; struct io_tlb_mem *io_tlb_default_mem; +#ifdef CONFIG_DEBUG_FS +static struct dentry *debugfs_dir; +#endif /* * Max segment that we can provide which (if pages are contingous) will @@ -664,18 +667,24 @@ EXPORT_SYMBOL_GPL(is_swiotlb_active); #ifdef CONFIG_DEBUG_FS -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