From patchwork Wed Jun 16 03:52:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12323985 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,URIBL_BLOCKED,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 7BE37C49EA2 for ; Wed, 16 Jun 2021 03:54:03 +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 4887A61075 for ; Wed, 16 Jun 2021 03:54:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4887A61075 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id ED81F6E4A6; Wed, 16 Jun 2021 03:54:02 +0000 (UTC) Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2A6F76E4A6 for ; Wed, 16 Jun 2021 03:54:02 +0000 (UTC) Received: by mail-pl1-x62a.google.com with SMTP id u18so453234plc.0 for ; Tue, 15 Jun 2021 20:54:02 -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=oRb0kCzQtLL1ODc5XeMJxnNfFZ/YZDLs649wILFum/w=; b=fDeLRHQuzvZl/O2NTctSqXJKMWXTxqlo16QC4RXzz6Fvxm73sl/3M8yfUKRM/Xfzv2 sPwjA2S4EPwgw1F4xRrjz17pkm8IuR4J9KX6wisU/p3khyvTs1wWM44nrtHddPEv3UvM iBGwg92Cx7crarCTSI8jG8z24tV7ZZ8Qr4q3E= 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=oRb0kCzQtLL1ODc5XeMJxnNfFZ/YZDLs649wILFum/w=; b=lo1/AKIKc56uF6wzD99K0cc0hVjQkycD25aOUMOG0PNDqvS/KsCcx5BtVfJMkFNGbc yL0S/jhvSVa7emkvU0eeocbuINI9y0djWc+ugsSSDRRggdJK6vx0z9tN79qFMniiTLnJ gSmQ9ve+msIQis7cenHe02rOaMV4cVXPxs44GdRZzTR6Wu6kCHWUH/PgJShShk5M6Cj9 kRawD7Si0yaebVDW/TWEc+1HkxABlH7yeO7uj721wBvEXS9QS2JexdlBl3b+8+dq0PCW bXcJ6UeyUutG2B0JmRpZQi7ia65211F9TX4xK2ZqZT0I8JtZAtFmGErJANUwA2ZkRmns 6v3w== X-Gm-Message-State: AOAM532ScGbTxvOR6h5naEl7i9jexTINr41xq5IctTusxL5+Msf8vc2E ymE5t71hFwGCfGGZtGk/51VOUA== X-Google-Smtp-Source: ABdhPJz2SpFmFttTbKmua4yfCKw+rNX4RUtDeeiYBVc41CWQZ990iBLac4Laog8hhJ7q/QRKPHHVEg== X-Received: by 2002:a17:902:bf02:b029:11e:89a0:8694 with SMTP id bi2-20020a170902bf02b029011e89a08694mr1859083plb.83.1623815641807; Tue, 15 Jun 2021 20:54:01 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:3d52:f252:7393:1992]) by smtp.gmail.com with UTF8SMTPSA id o186sm531682pfb.59.2021.06.15.20.53.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 15 Jun 2021 20:54:01 -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 Date: Wed, 16 Jun 2021 11:52:36 +0800 Message-Id: <20210616035240.840463-9-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.272.g935e593368-goog In-Reply-To: <20210616035240.840463-1-tientzu@chromium.org> References: <20210616035240.840463-1-tientzu@chromium.org> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v11 08/12] swiotlb: Refactor swiotlb_tbl_unmap_single X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & 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, benh@kernel.crashing.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 , 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: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add a new function, swiotlb_release_slots, to make the code reusable for supporting different bounce buffer pools. Signed-off-by: Claire Chang Reviewed-by: Christoph Hellwig --- 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 037772724b3c..fec4934b9926 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -555,27 +555,15 @@ 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 swiotlb_release_slots(struct device *dev, phys_addr_t tlb_addr) { - struct io_tlb_mem *mem = hwdev->dma_io_tlb_mem; + struct io_tlb_mem *mem = dev->dma_io_tlb_mem; 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. @@ -610,6 +598,23 @@ 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); + + swiotlb_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) {