From patchwork Thu Jun 17 06:26:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 12326797 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=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 37EDDC49EA3 for ; Thu, 17 Jun 2021 06:27:53 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 E767161351 for ; Thu, 17 Jun 2021 06:27:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E767161351 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.143632.264651 (Exim 4.92) (envelope-from ) id 1ltlVC-0004hK-A6; Thu, 17 Jun 2021 06:27:46 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 143632.264651; Thu, 17 Jun 2021 06:27:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ltlVC-0004h8-74; Thu, 17 Jun 2021 06:27:46 +0000 Received: by outflank-mailman (input) for mailman id 143632; Thu, 17 Jun 2021 06:27:45 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ltlVB-0003Kj-AL for xen-devel@lists.xenproject.org; Thu, 17 Jun 2021 06:27:45 +0000 Received: from mail-pj1-x1033.google.com (unknown [2607:f8b0:4864:20::1033]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 73a45940-e716-43a8-8f60-8e9b78dd7ec4; Thu, 17 Jun 2021 06:27:39 +0000 (UTC) Received: by mail-pj1-x1033.google.com with SMTP id fy24-20020a17090b0218b029016c5a59021fso5511044pjb.0 for ; Wed, 16 Jun 2021 23:27:39 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:e349:a6ae:d3d0:1621]) by smtp.gmail.com with UTF8SMTPSA id 35sm3596288pjo.16.2021.06.16.23.27.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 16 Jun 2021 23:27:38 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 73a45940-e716-43a8-8f60-8e9b78dd7ec4 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=M9QMk6wNnc5T8dsQ/UUh5z8ZmmRgMMkTubKMJRCpcCQ=; b=JnlqSxQ0Uf3OGBOxNwxNPZIoriAC1E5rya6kAaIHMCoU7r6zyVlQyQAs2Cf4khFFTc FnTwZMJShLQfAGP+cRvLvkERNMaZ59MsN4kjblSaWpyhFUBx++fS1mFP3+oMtxuFiXLi zmBgZVd1RthmZvsv20lFYrEIPwPYmEanEfCKU= 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=M9QMk6wNnc5T8dsQ/UUh5z8ZmmRgMMkTubKMJRCpcCQ=; b=YPCz1TP3D4jI918Uh7DpwB3vxpg082hUvbzXAcXVrBj7O1HMJQmOPxHoK5oWQyHD5F TZImo6XWtD6TIsoSY6+nsO9zNy3V/QCLQ2I+/Y0cuONDweiaCVkQ+I+j+C6W5NVVEfSE evPpiyji4vvVRDza8K6zV6o1syJl6vm7rQ8+BXgo3IJMWHmkLJ6yQjIwuOMcomBUC7E6 3k68NQiKPBLnnEAgMOHVaWyOffHxYd5xy1HyCkpnP1fhYU+Ns7Aqo8oY2/P8Ajc/AP7z sDNuJ93iHL9RIgwla7ut3TVqxMoRMvlOZqdmQbLrVp41V2cIDdUbmJDXU6RGoo3qoV4u SwKw== X-Gm-Message-State: AOAM530Bg2cNiTCNNlYvxknTiosrBd8f3Ip3EyGl5hpUdsLBj75LCZtm NTXUnZmml+WNX0tG6rk21dXzkg== X-Google-Smtp-Source: ABdhPJztF3OTqYFYqSHpiBI0X201j37FByNBNjiUFjc1rLhaj0s7r4pHVp8888/DL4p7nv1mwIeNTA== X-Received: by 2002:a17:90b:881:: with SMTP id bj1mr3933119pjb.119.1623911258726; Wed, 16 Jun 2021 23:27:38 -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 Subject: [PATCH v13 06/12] swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing Date: Thu, 17 Jun 2021 14:26:29 +0800 Message-Id: <20210617062635.1660944-7-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.288.g62a8d224e6-goog In-Reply-To: <20210617062635.1660944-1-tientzu@chromium.org> References: <20210617062635.1660944-1-tientzu@chromium.org> MIME-Version: 1.0 Propagate the swiotlb_force into io_tlb_default_mem->force_bounce and use it to determine whether to bounce the data or not. This will be useful later to allow for different pools. Signed-off-by: Claire Chang Reviewed-by: Christoph Hellwig Tested-by: Stefano Stabellini Tested-by: Will Deacon Acked-by: Stefano Stabellini --- drivers/xen/swiotlb-xen.c | 2 +- include/linux/swiotlb.h | 11 +++++++++++ kernel/dma/direct.c | 2 +- kernel/dma/direct.h | 2 +- kernel/dma/swiotlb.c | 4 ++++ 5 files changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 0c6ed09f8513..4730a146fa35 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -369,7 +369,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, if (dma_capable(dev, dev_addr, size, true) && !range_straddles_page_boundary(phys, size) && !xen_arch_need_swiotlb(dev, phys, dev_addr) && - swiotlb_force != SWIOTLB_FORCE) + !is_swiotlb_force_bounce(dev)) goto done; /* diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index dd1c30a83058..8d8855c77d9a 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -84,6 +84,7 @@ extern enum swiotlb_force swiotlb_force; * unmap calls. * @debugfs: The dentry to debugfs. * @late_alloc: %true if allocated using the page allocator + * @force_bounce: %true if swiotlb bouncing is forced */ struct io_tlb_mem { phys_addr_t start; @@ -94,6 +95,7 @@ struct io_tlb_mem { spinlock_t lock; struct dentry *debugfs; bool late_alloc; + bool force_bounce; struct io_tlb_slot { phys_addr_t orig_addr; size_t alloc_size; @@ -109,6 +111,11 @@ static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr) return mem && paddr >= mem->start && paddr < mem->end; } +static inline bool is_swiotlb_force_bounce(struct device *dev) +{ + return dev->dma_io_tlb_mem->force_bounce; +} + void __init swiotlb_exit(void); unsigned int swiotlb_max_segment(void); size_t swiotlb_max_mapping_size(struct device *dev); @@ -120,6 +127,10 @@ static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr) { return false; } +static inline bool is_swiotlb_force_bounce(struct device *dev) +{ + return false; +} static inline void swiotlb_exit(void) { } diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 7a88c34d0867..a92465b4eb12 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -496,7 +496,7 @@ size_t dma_direct_max_mapping_size(struct device *dev) { /* If SWIOTLB is active, use its maximum mapping size */ if (is_swiotlb_active(dev) && - (dma_addressing_limited(dev) || swiotlb_force == SWIOTLB_FORCE)) + (dma_addressing_limited(dev) || is_swiotlb_force_bounce(dev))) return swiotlb_max_mapping_size(dev); return SIZE_MAX; } diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h index 13e9e7158d94..4632b0f4f72e 100644 --- a/kernel/dma/direct.h +++ b/kernel/dma/direct.h @@ -87,7 +87,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev, phys_addr_t phys = page_to_phys(page) + offset; dma_addr_t dma_addr = phys_to_dma(dev, phys); - if (unlikely(swiotlb_force == SWIOTLB_FORCE)) + if (is_swiotlb_force_bounce(dev)) return swiotlb_map(dev, phys, size, dir, attrs); if (unlikely(!dma_capable(dev, dma_addr, size, true))) { diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 409694d7a8ad..13891d5de8c9 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -179,6 +179,10 @@ static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, mem->end = mem->start + bytes; mem->index = 0; mem->late_alloc = late_alloc; + + if (swiotlb_force == SWIOTLB_FORCE) + mem->force_bounce = true; + spin_lock_init(&mem->lock); for (i = 0; i < mem->nslabs; i++) { mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);