From patchwork Tue Jun 15 13:27:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claire Chang X-Patchwork-Id: 1492181 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=mPVHkLym; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4G48K75nLYz9sjB for ; Tue, 15 Jun 2021 23:28:27 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231165AbhFONaa (ORCPT ); Tue, 15 Jun 2021 09:30:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231276AbhFONaU (ORCPT ); Tue, 15 Jun 2021 09:30:20 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A9828C0613A4 for ; Tue, 15 Jun 2021 06:28:15 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id s17-20020a17090a8811b029016e89654f93so1812883pjn.1 for ; Tue, 15 Jun 2021 06:28:15 -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=gECPOPsCtEK5Wckt8RcLyHfozwB/E+EP94LARsjIoQM=; b=mPVHkLymWWoJ5FXza4lDdJkjRkkGCCIqZROcG/jPVhk85ennw8Lh8afIhfaPbKo5fw xPoOamL8LmyrImoT77PgcPoa1udPeAWbdwayu1G1kJioGMIeK2BCidzwj4454R/AYVbe p31PisuhVJxV7c4fEx4O7jr/Zump68KiUpmW0= 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=gECPOPsCtEK5Wckt8RcLyHfozwB/E+EP94LARsjIoQM=; b=qLYpsGe9DvkjwGlVaPP36fCC0NUwBJwbn9l86U1+s28OeOWnlZAz/2zBb4J7HJZc3L TcmK0Gc7zAbKKi8PrOMyc9pLyKW8YqNxgw4feKnCtmnwk9wJYFqXfpKdtSEOC8qhgsAq Q+rRg+4U/v/Tuv1EPhbX0bpMJVNHEtrhbvaNtzzQdUgv8i3A2tALs5FEXXxykTFzkgHN VO11BbcOIXjsVsHAtt6xo01QrBKZoj9zSNS7NUL1tHEevT4ZswiMcZn0FpOnnovrHtVo VY7MGkBzb4Chbolnlm84kkOIB/dcLqF5bUQwVw6jEAh07C/39OjvBtNWiXY7dzIYqt4A 9SFA== X-Gm-Message-State: AOAM532qLJ2ip9EV1tXLB34RXuyQ4vXS5BpSOWV51Zg9G3IM/dPkne3S 8urY66O38usOuTMMsJGtoNLRRg== X-Google-Smtp-Source: ABdhPJwap5O4zLmEMY+RUjCuo1vguR5XAd/2u88H1tpc55JUzosxwbsWkllIYJMBsZxK3z6SxqvnHg== X-Received: by 2002:a17:90a:fe18:: with SMTP id ck24mr5167618pjb.158.1623763695284; Tue, 15 Jun 2021 06:28:15 -0700 (PDT) Received: from localhost ([2401:fa00:95:205:1846:5274:e444:139e]) by smtp.gmail.com with UTF8SMTPSA id q145sm8796577pfc.60.2021.06.15.06.28.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 15 Jun 2021 06:28:14 -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 v10 06/12] swiotlb: Use is_dev_swiotlb_force for swiotlb data bouncing Date: Tue, 15 Jun 2021 21:27:05 +0800 Message-Id: <20210615132711.553451-7-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 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Propagate the swiotlb_force setting into io_tlb_default_mem->force 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 --- include/linux/swiotlb.h | 11 +++++++++++ kernel/dma/direct.c | 2 +- kernel/dma/direct.h | 2 +- kernel/dma/swiotlb.c | 4 ++++ 4 files changed, 17 insertions(+), 2 deletions(-) diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index dd1c30a83058..efcd56e3a16c 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: %true if swiotlb 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; 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_dev_swiotlb_force(struct device *dev) +{ + return dev->dma_io_tlb_mem->force; +} + 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_dev_swiotlb_force(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..3713461d6fe0 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_dev_swiotlb_force(dev))) return swiotlb_max_mapping_size(dev); return SIZE_MAX; } diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h index 13e9e7158d94..6c4d13caceb1 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_dev_swiotlb_force(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 d07e32020edf..5af47a8f68b8 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 = true; + spin_lock_init(&mem->lock); for (i = 0; i < mem->nslabs; i++) { mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i);