From mboxrd@z Thu Jan 1 00:00:00 1970 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=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 18E98C48BE6 for ; Mon, 14 Jun 2021 06:26:18 +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 DD21B6120E for ; Mon, 14 Jun 2021 06:26:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DD21B6120E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de 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 3646589D84; Mon, 14 Jun 2021 06:26:17 +0000 (UTC) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5AE8F89D84; Mon, 14 Jun 2021 06:26:16 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 1F6F967373; Mon, 14 Jun 2021 08:26:14 +0200 (CEST) Date: Mon, 14 Jun 2021 08:26:13 +0200 From: Christoph Hellwig To: Claire Chang Message-ID: <20210614062613.GI28343@lst.de> References: <20210611152659.2142983-1-tientzu@chromium.org> <20210611152659.2142983-10-tientzu@chromium.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210611152659.2142983-10-tientzu@chromium.org> User-Agent: Mutt/1.5.17 (2007-11-01) Subject: Re: [Intel-gfx] [PATCH v9 09/14] swiotlb: Refactor swiotlb_tbl_unmap_single 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, Frank Rowand , mingo@kernel.org, Marek Szyprowski , sstabellini@kernel.org, Saravana Kannan , mpe@ellerman.id.au, Joerg Roedel , "Rafael J . Wysocki" , Christoph Hellwig , 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 , jxgao@google.com, Will Deacon , Konrad Rzeszutek Wilk , airlied@linux.ie, Dan Williams , linuxppc-dev@lists.ozlabs.org, Rob Herring , bhelgaas@google.com, boris.ostrovsky@oracle.com, Andy Shevchenko , jgross@suse.com, Nicolas Boichat , Greg KH , Randy Dunlap , lkml , tfiga@chromium.org, "list@263.net:IOMMU DRIVERS" , Jim Quinlan , xypron.glpk@gmx.de, Robin Murphy , bauerman@linux.ibm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Fri, Jun 11, 2021 at 11:26:54PM +0800, Claire Chang wrote: > Add a new function, release_slots, to make the code reusable for supporting > different bounce buffer pools, e.g. restricted DMA pool. > > Signed-off-by: Claire Chang > --- > kernel/dma/swiotlb.c | 35 ++++++++++++++++++++--------------- > 1 file changed, 20 insertions(+), 15 deletions(-) > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 364c6c822063..a6562573f090 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -554,27 +554,15 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, > return tlb_addr; > } > > -/* > - * tlb_addr is the physical address of the bounce buffer to unmap. > - */ > -void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, > - size_t mapping_size, enum dma_data_direction dir, > - unsigned long attrs) > +static void release_slots(struct device *dev, phys_addr_t tlb_addr) > { > - struct io_tlb_mem *mem = hwdev->dma_io_tlb_mem; > + struct io_tlb_mem *mem = dev->dma_io_tlb_mem; > unsigned long flags; > - unsigned int offset = swiotlb_align_offset(hwdev, tlb_addr); > + unsigned int offset = swiotlb_align_offset(dev, tlb_addr); > int index = (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT; > int nslots = nr_slots(mem->slots[index].alloc_size + offset); > int count, i; > > - /* > - * First, sync the memory before unmapping the entry > - */ > - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) && > - (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)) > - swiotlb_bounce(hwdev, tlb_addr, mapping_size, DMA_FROM_DEVICE); > - > /* > * Return the buffer to the free list by setting the corresponding > * entries to indicate the number of contiguous entries available. > @@ -609,6 +597,23 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, > spin_unlock_irqrestore(&mem->lock, flags); > } > > +/* > + * tlb_addr is the physical address of the bounce buffer to unmap. > + */ > +void swiotlb_tbl_unmap_single(struct device *dev, phys_addr_t tlb_addr, > + size_t mapping_size, enum dma_data_direction dir, > + unsigned long attrs) > +{ > + /* > + * First, sync the memory before unmapping the entry > + */ > + if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) && > + (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)) > + swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_FROM_DEVICE); > + > + release_slots(dev, tlb_addr); Can you give this a swiotlb_ prefix? Otherwise looks good: Reviewed-by: Christoph Hellwig _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx