From patchwork Tue May 18 06:42:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12263819 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=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 F320CC43600 for ; Tue, 18 May 2021 06:44:11 +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 AC77761263 for ; Tue, 18 May 2021 06:44:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AC77761263 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.128777.241732 (Exim 4.92) (envelope-from ) id 1litSW-0007SC-7K; Tue, 18 May 2021 06:44:04 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 128777.241732; Tue, 18 May 2021 06:44:04 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1litSW-0007S5-46; Tue, 18 May 2021 06:44:04 +0000 Received: by outflank-mailman (input) for mailman id 128777; Tue, 18 May 2021 06:44:03 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1litSV-0007Nz-3j for xen-devel@lists.xenproject.org; Tue, 18 May 2021 06:44:03 +0000 Received: from mail-pf1-x430.google.com (unknown [2607:f8b0:4864:20::430]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 39c0ef2e-1c34-4b28-a921-96ab2962ec73; Tue, 18 May 2021 06:43:59 +0000 (UTC) Received: by mail-pf1-x430.google.com with SMTP id c17so6684207pfn.6 for ; Mon, 17 May 2021 23:43:59 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:f284:b819:54ca:c198]) by smtp.gmail.com with UTF8SMTPSA id a20sm11420303pfc.186.2021.05.17.23.43.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 May 2021 23:43:58 -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: 39c0ef2e-1c34-4b28-a921-96ab2962ec73 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=rgayaZ7GWHTeliLzRc8wy4aBShyZ94T8DlXHnve2v7k=; b=CVg5cNHTebHTJBqunCV47Mo4qFeoHBEr6ld6Z/DEG1lU3dLG5r4Wtlzfn2KP5mrHvt 1FVkRCobdEPqqc2lDqiiicjReh7MqCklniPhFZkWQ+I1p8japwv1ZRgN9VbgBNgBNXG2 qhC05pQchQ4qBPIe+0xKhViNhyd4HiCnod0sI= 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=rgayaZ7GWHTeliLzRc8wy4aBShyZ94T8DlXHnve2v7k=; b=tM+yarZGU8BU0DKI1/Tl1ntScUctvXXIMO1mbutzUDBsBDL5TVXpL/Nf0O62N/8Ofs +Rtq3j4FqUsx9CEThd39n7za+K9QO9rxlQy7HKZ5GPKxpWeD+umYzRsm7catIX8wR8ek kp53EAhY1HYDGd3dPAgcZA+/ni8/olAXS02oA9cRHLq74+GjlJ5R/GjJYNoTXlTrY2jX AiNOhiFRIXnuiQ4JOR86ynvZczDKYvcfMZPFCFYbEp08jDSWRUl6il7Pi35shBumyoLv bkVJN+d+yTKAkxJmDZGUqxzOYQ9joWPZAMl7dPD1tE4lpAhG94CAcOeNg8xEVH447q+x rbfA== X-Gm-Message-State: AOAM532TFuAsyimyA5aUVLjRWl5YVNKdVVa6iS6uOcRect7O2Rm8zkbs sumx9b+hPMuPq9rMq04rnO8YOQ== X-Google-Smtp-Source: ABdhPJzly3p1J9a9fnkqt1peWSejUIuoFQSkE4/Sieh8f/p1YXKxhe9yeeLQRNOCgO9q/A9p4jxA0A== X-Received: by 2002:a63:ae01:: with SMTP id q1mr3455733pgf.216.1621320238755; Mon, 17 May 2021 23:43:58 -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 10/15] swiotlb: Refactor swiotlb_tbl_unmap_single Date: Tue, 18 May 2021 14:42:10 +0800 Message-Id: <20210518064215.2856977-11-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 Add a new function, release_slots, to make the code reusable for supporting different bounce buffer pools, e.g. restricted DMA pool. Signed-off-by: Claire Chang --- kernel/dma/swiotlb.c | 35 ++++++++++++++++++++--------------- 1 file changed, 20 insertions(+), 15 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 2ec6711071de..cef856d23194 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -550,27 +550,15 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, return tlb_addr; } -/* - * tlb_addr is the physical address of the bounce buffer to unmap. - */ -void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, - size_t mapping_size, enum dma_data_direction dir, - unsigned long attrs) +static void release_slots(struct device *dev, phys_addr_t tlb_addr) { - struct io_tlb_mem *mem = get_io_tlb_mem(hwdev); + struct io_tlb_mem *mem = get_io_tlb_mem(dev); unsigned long flags; - unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr); + unsigned int offset = swiotlb_align_offset(dev, tlb_addr); int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT; int nslots = nr_slots(mem->slots[index].alloc_size + offset); int count, i; - /* - * First, sync the memory before unmapping the entry - */ - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) && - (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)) - swiotlb_bounce(hwdev, tlb_addr, mapping_size, DMA_FROM_DEVICE); - /* * Return the buffer to the free list by setting the corresponding * entries to indicate the number of contiguous entries available. @@ -605,6 +593,23 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, spin_unlock_irqrestore(&mem->lock, flags); } +/* + * tlb_addr is the physical address of the bounce buffer to unmap. + */ +void swiotlb_tbl_unmap_single(struct device *dev, phys_addr_t tlb_addr, + size_t mapping_size, enum dma_data_direction dir, + unsigned long attrs) +{ + /* + * First, sync the memory before unmapping the entry + */ + if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) && + (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)) + swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_FROM_DEVICE); + + release_slots(dev, tlb_addr); +} + void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr, size_t size, enum dma_data_direction dir) {