From patchwork Sat Jun 19 03:40:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12332579 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=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 7535BC48BE5 for ; Sat, 19 Jun 2021 03:42:01 +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 48FFC611B0 for ; Sat, 19 Jun 2021 03:41:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 48FFC611B0 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 EDD216EB13; Sat, 19 Jun 2021 03:41:58 +0000 (UTC) Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7B7CE6EB13 for ; Sat, 19 Jun 2021 03:41:57 +0000 (UTC) Received: by mail-pg1-x536.google.com with SMTP id m2so9437116pgk.7 for ; Fri, 18 Jun 2021 20:41:57 -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=yBt4hQLYm3mqRXyO6Ue9ozYRrGCBFDovL1RqQBClg04=; b=kUc0aW3NrRDs5U6B12hrWDg0XWc0HZESQnTqGuqF1lOwto9c+7mt8gkEytThboQsHz XLan+5H8MDt3PRVY3ReT+qPhu28xh6wjPY72lJEd12tdFryWy7Q2zgQsEGYf4tF3oitf PfRsCwU9hKassTMBsMhc64Ic4q5xVPJYHDueg= 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=yBt4hQLYm3mqRXyO6Ue9ozYRrGCBFDovL1RqQBClg04=; b=GtlF4VN4DcVOG/IHNohjGYhx6mvqevQfOT+27do9UL1JJjhKQtFFq83nlb/L8o70rE SjYHOSXD0qfU8Lord/n/VFZXvd8uDTE5kbKh8mA7t2YZQOWbkWL62emB9vOuTc5Ywhum OpCIdOss9hYPFUzp1U+PGNdx0h1lTySxvuZWy9SfuF/8aVSzrsp0Y36d5tqJnEBB4ISS rXXAwOjwEJMGxJ/WFw0mQ/8FvFpiDZBDe/K8QK5757Zj+jinmNxMFE5ZgSEFSNbx4Izf Enk75JuemYIR+/m+UcpdzLF05YIbccuqQoFu7EV7HDINvjpra2HvCqVxR5Rcaz2KW1+K 7tjA== X-Gm-Message-State: AOAM5300lPCgMHD5NF0fCGqpyHMVAHOUifufNiSsnSK18+cThOyLP2A5 mjiVd8/MOK02X0DDxKyiejx2tQ== X-Google-Smtp-Source: ABdhPJz6BPgqX8oIJ5DFtEDFLRXoE9Gt4G8MSlnWyfHJyjQTUFcAShEWPij+Zot6PwERvV6L2IAQtA== X-Received: by 2002:a63:dd4a:: with SMTP id g10mr12899661pgj.144.1624074117138; Fri, 18 Jun 2021 20:41:57 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:4a46:e208:29e8:e076]) by smtp.gmail.com with UTF8SMTPSA id d8sm9801812pfq.198.2021.06.18.20.41.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 18 Jun 2021 20:41:56 -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: Sat, 19 Jun 2021 11:40:38 +0800 Message-Id: <20210619034043.199220-8-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.288.g62a8d224e6-goog In-Reply-To: <20210619034043.199220-1-tientzu@chromium.org> References: <20210619034043.199220-1-tientzu@chromium.org> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v14 07/12] swiotlb: Move alloc_size to swiotlb_find_slots 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 , thomas.lendacky@amd.com, linuxppc-dev@lists.ozlabs.org, bauerman@linux.ibm.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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 | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 0d294bbf274c..daf38a52e66d 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); @@ -488,8 +488,11 @@ 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--) @@ -530,7 +533,7 @@ 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 +547,8 @@ 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))