From patchwork Tue Jun 15 13:27:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12321411 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 86632C49EA2 for ; Tue, 15 Jun 2021 13:28:27 +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 5859561460 for ; Tue, 15 Jun 2021 13:28:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5859561460 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 949F889A4E; Tue, 15 Jun 2021 13:28:26 +0000 (UTC) Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by gabe.freedesktop.org (Postfix) with ESMTPS id F15C089973 for ; Tue, 15 Jun 2021 13:28:24 +0000 (UTC) Received: by mail-pj1-x102e.google.com with SMTP id s17-20020a17090a8811b029016e89654f93so1813182pjn.1 for ; Tue, 15 Jun 2021 06:28:24 -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=G2K/m+Zr/C3L9kjElXXnw2MqplvvJistlV9RBDCxxbA=; b=S+0WgFWRpS+XVuyOr6ge+m8GeoamDCl8MImPmxPownLMaRnPddIW/4jWtOzq7baMS4 2cYnPw3kqWnOh0beyRy8sCyEGJJQnDgQZsawvLBFKtk8G7k3bIkUl48o16Ce4bkzeIE8 42Td6UN7L2/FOv7HufjRoYmlw39AIEDY4BEEo= 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=G2K/m+Zr/C3L9kjElXXnw2MqplvvJistlV9RBDCxxbA=; b=OsOjmkz7EAXhdDflAIPNC+P0AgBsXL4WXlaJ/wXG+eP05io6f7rGaYsP1QKDaqB2di BvkOtoN4eQ2bq0f1UOx64oHSWt5Q2VFDrKQw8g0Em2rpiS7Y1sg2q/2ohCJ7DjF3N8+O zGDJmLeW0I2YEPL18sBq+ChqM/nVxxXkJlkHZ02fYWrktsxgzs/otYUAQJkPxmzS1hOa B0RXEO70MQaJKkTP8nrw1XrzzZ/Rw5JQqHrS3D1W1pTprBic2VKuCL6OGFyHJ5Cyvg3O WAkN6/zkOh5jovaibCaMUgDKCk0jebgfCFNmWoSk77CX6zowZSYtCQztRPbGFgLJZKzP l7cQ== X-Gm-Message-State: AOAM530v1xdRBrBDC1VjKRowYHpKAyk4S4vos1ixkdN/3CNIq208SaIg ZspAu8umpN1qPane46yf2GrN5A== X-Google-Smtp-Source: ABdhPJzZB1FWHQkznzmBmSBFzh8JRoY7MD6aobVhux7mtkc928qojTPDdCJJ8YwZ2pCQlZ/ERmu5LQ== X-Received: by 2002:a17:90a:5b07:: with SMTP id o7mr10771533pji.35.1623763704484; Tue, 15 Jun 2021 06:28:24 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:1846:5274:e444:139e]) by smtp.gmail.com with UTF8SMTPSA id b6sm15444521pfv.16.2021.06.15.06.28.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 15 Jun 2021 06:28:23 -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 v10 07/12] swiotlb: Move alloc_size to swiotlb_find_slots Date: Tue, 15 Jun 2021 21:27:06 +0800 Message-Id: <20210615132711.553451-8-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.272.g935e593368-goog In-Reply-To: <20210615132711.553451-1-tientzu@chromium.org> References: <20210615132711.553451-1-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" Rename find_slots to swiotlb_find_slots and move the maintenance of alloc_size to it for better code reusability later. Signed-off-by: Claire Chang --- kernel/dma/swiotlb.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 5af47a8f68b8..e498f11e150e 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -422,8 +422,8 @@ static unsigned int wrap_index(struct io_tlb_mem *mem, unsigned int index) * Find a suitable number of IO TLB entries size that will fit this request and * allocate a buffer from that IO TLB pool. */ -static int find_slots(struct device *dev, phys_addr_t orig_addr, - size_t alloc_size) +static int swiotlb_find_slots(struct device *dev, phys_addr_t orig_addr, + size_t alloc_size) { struct io_tlb_mem *mem = dev->dma_io_tlb_mem; unsigned long boundary_mask = dma_get_seg_boundary(dev); @@ -478,8 +478,11 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr, return -1; found: - for (i = index; i < index + nslots; i++) + for (i = index; i < index + nslots; i++) { mem->slots[i].list = 0; + mem->slots[i].alloc_size = + alloc_size - ((i - index) << IO_TLB_SHIFT); + } for (i = index - 1; io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && mem->slots[i].list; i--) @@ -520,7 +523,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, return (phys_addr_t)DMA_MAPPING_ERROR; } - index = find_slots(dev, orig_addr, alloc_size + offset); + index = swiotlb_find_slots(dev, orig_addr, alloc_size + offset); if (index == -1) { if (!(attrs & DMA_ATTR_NO_WARN)) dev_warn_ratelimited(dev, @@ -534,11 +537,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, * This is needed when we sync the memory. Then we sync the buffer if * needed. */ - for (i = 0; i < nr_slots(alloc_size + offset); i++) { + for (i = 0; i < nr_slots(alloc_size + offset); i++) mem->slots[index + i].orig_addr = slot_addr(orig_addr, i); - mem->slots[index + i].alloc_size = - alloc_size - (i << IO_TLB_SHIFT); - } tlb_addr = slot_addr(mem->start, index) + offset; if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) && (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))