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: 1496674 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256 header.s=google header.b=QrT3tJse; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4G9lB43y5zz9sRf for ; Fri, 25 Jun 2021 01:56:44 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231294AbhFXP7C (ORCPT ); Thu, 24 Jun 2021 11:59:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232481AbhFXP7B (ORCPT ); Thu, 24 Jun 2021 11:59:01 -0400 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65E15C06175F for ; Thu, 24 Jun 2021 08:56:42 -0700 (PDT) Received: by mail-pj1-x1036.google.com with SMTP id h23so3745797pjv.2 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=meMiWWP+1mUe5Hev/Jlcs7bF/Jw2nOGvC/IEGMfcvnnHVa236EY0KCecF3PejImZSN b5uC0JqqEbkdhZsMEWeBc7zqqrM8bb2hKBFqhuC7GGbJIUXeuGHbWkbp93Y6JK3LZ7n4 K5CzpYS164RP+uChsRjxxF11wCWX55nemwvhvJyOb6weMPMnGYndQk4K1MA04DJNVkG3 pUwRnOEp+39wxxYNF8IDL2eg+cKnVhE8lejUkUynuN36cVG4aHNpPD8MVe6QhqkP3pBz E7utdzGsgvBqaoDeXyiSrYviMeZw0UTUCYI9qLREToetci9SeiJH+hzoMZNysHyjsUEG d9AA== X-Gm-Message-State: AOAM530S0nvRK2Bi5UFaLtoTYahKYnBizg4FpYWXbIOOkrMaMtyu7Yth huMZ6QoGh4smJknj7C9abIKAew== 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 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, thomas.lendacky@amd.com, quic_qiancai@quicinc.com 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 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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))