From patchwork Thu Jun 24 15:55:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12342511 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=-16.5 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=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 64FCBC49EA7 for ; Thu, 24 Jun 2021 15:56:57 +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 2D1A96135C for ; Thu, 24 Jun 2021 15:56:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D1A96135C 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 8E4366EC5B; Thu, 24 Jun 2021 15:56:56 +0000 (UTC) Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4BF046EC54 for ; Thu, 24 Jun 2021 15:56:42 +0000 (UTC) Received: by mail-pj1-x1033.google.com with SMTP id z3-20020a17090a3983b029016bc232e40bso3750574pjb.4 for ; Thu, 24 Jun 2021 08:56:42 -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=k2v4ULCUV3P/ZykooMt4RnFrTyFS8LVxGS67nnIjZ/E=; b=QrT3tJse9UwGIKHlr8MsnQ/5shpb9vzqfj7YMQ2fYijn7FCRoIijuokKPkX0W4emjg zIW9mO8KXkFug0OUuL1YqRloVsCf7/HNDUAAE7RH/8xRS3Mt1GINoLA/1NQjeCh/6ZZs IZdWLInrLmUEvcR0rzL0waTaUCb67EWeMYbx0= 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=k2v4ULCUV3P/ZykooMt4RnFrTyFS8LVxGS67nnIjZ/E=; b=f/RabeZ0wlRdi3rCDZFJZT57zkTLGPnwCK+FziurYl2Z7hU0QAVkHBSo95vx8Jx+NY QG7xgrFECVM4cpwASGDYoDsF0PplaQGYGOITF/xZ+eonJFAVNcofon0jUrsmdgrRLmXc mf3hKgVGIP23XpwixHjKM6EflNhjKVynHX7wajlClm+9uGYBulYd4kRjONtZNS0Ol8V8 Ixb8qradIBI+dbQXrHw/HA8IsGBlLEHtLru0B6kq779X9W8V85rIpOPaSGgWJuspIrKZ yl62Q52cn7zgTj1LcRsa6LJw2zZgVOdfJsBAtBTCIRvsZvhkPXigg6Hvy7ZH/JSF2ZAj 2+PA== X-Gm-Message-State: AOAM531WkxljWZsvI44KUmzub4N1Et9mkAkPTq9/U+X6QAzPl6A+Vzzq 5OIlVF2t1uGUjEux6XJPhNLQwQ== X-Google-Smtp-Source: ABdhPJzbejiNIcTS+DoAyoRSN0idnXT3+mB1g+t9ZbfEjTYMX6+0aJ+6gkXmZUbbSTOePShgS47cWw== X-Received: by 2002:a17:90b:1bc6:: with SMTP id oa6mr15922344pjb.151.1624550201945; Thu, 24 Jun 2021 08:56:41 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:165a:99ec:42d5:d8b]) by smtp.gmail.com with UTF8SMTPSA id t13sm3434704pfq.173.2021.06.24.08.56.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 24 Jun 2021 08:56:41 -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 v15 07/12] swiotlb: Move alloc_size to swiotlb_find_slots Date: Thu, 24 Jun 2021 23:55:21 +0800 Message-Id: <20210624155526.2775863-8-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.288.g62a8d224e6-goog In-Reply-To: <20210624155526.2775863-1-tientzu@chromium.org> References: <20210624155526.2775863-1-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 , quic_qiancai@quicinc.com, lkml , tfiga@chromium.org, "list@263.net:IOMMU DRIVERS" , Jim Quinlan , thomas.lendacky@amd.com, 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 Reviewed-by: Christoph Hellwig Tested-by: Stefano Stabellini Tested-by: Will Deacon --- kernel/dma/swiotlb.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 0d294bbf274c..b41d16e92cf6 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -432,8 +432,8 @@ 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); @@ -444,6 +444,7 @@ static int find_slots(struct device *dev, phys_addr_t orig_addr, dma_get_min_align_mask(dev) & ~(IO_TLB_SIZE - 1); unsigned int nslots = nr_slots(alloc_size), stride; unsigned int index, wrap, count = 0, i; + unsigned int offset = swiotlb_align_offset(dev, orig_addr); unsigned long flags; BUG_ON(!nslots); @@ -488,8 +489,11 @@ 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 - (offset + ((i - index) << IO_TLB_SHIFT)); + } for (i = index - 1; io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 && mem->slots[i].list; i--) @@ -530,7 +534,7 @@ 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, @@ -544,11 +548,8 @@ 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))