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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D85E1C38142 for ; Sat, 28 Jan 2023 08:33:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234010AbjA1IdV (ORCPT ); Sat, 28 Jan 2023 03:33:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59960 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233965AbjA1IdP (ORCPT ); Sat, 28 Jan 2023 03:33:15 -0500 Received: from out30-132.freemail.mail.aliyun.com (out30-132.freemail.mail.aliyun.com [115.124.30.132]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C148E32529 for ; Sat, 28 Jan 2023 00:33:12 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046049;MF=guorui.yu@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0VaGyb8l_1674894788; Received: from localhost(mailfrom:GuoRui.Yu@linux.alibaba.com fp:SMTPD_---0VaGyb8l_1674894788) by smtp.aliyun-inc.com; Sat, 28 Jan 2023 16:33:09 +0800 From: "GuoRui.Yu" To: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, konrad.wilk@oracle.com, linux-coco@lists.linux.dev Cc: GuoRui.Yu@linux.alibaba.com, robin.murphy@arm.com Subject: [PATCH 3/4] swiotlb: Add tracepoint swiotlb_unbounced Date: Sat, 28 Jan 2023 16:32:53 +0800 Message-Id: <20230128083254.86012-4-GuoRui.Yu@linux.alibaba.com> X-Mailer: git-send-email 2.29.2.540.g3cf59784d4 In-Reply-To: <20230128083254.86012-1-GuoRui.Yu@linux.alibaba.com> References: <20230128083254.86012-1-GuoRui.Yu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a new tracepoint swiotlb_unbounced to facilitate statistics of swiotlb buffer usage. Signed-off-by: GuoRui.Yu --- include/trace/events/swiotlb.h | 28 ++++++++++++++++++++++++++++ kernel/dma/common-swiotlb.c | 1 + 2 files changed, 29 insertions(+) diff --git a/include/trace/events/swiotlb.h b/include/trace/events/swiotlb.h index da05c9ebd224..0707adc34df5 100644 --- a/include/trace/events/swiotlb.h +++ b/include/trace/events/swiotlb.h @@ -35,6 +35,34 @@ TRACE_EVENT(swiotlb_bounced, __entry->force ? "FORCE" : "NORMAL") ); +TRACE_EVENT(swiotlb_unbounced, + TP_PROTO(struct device *dev, dma_addr_t dev_addr, size_t size), + TP_ARGS(dev, dev_addr, size), + + TP_STRUCT__entry( + __string(dev_name, dev_name(dev)) + __field(u64, dma_mask) + __field(dma_addr_t, dev_addr) + __field(size_t, size) + __field(bool, force) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(dev)); + __entry->dma_mask = (dev->dma_mask ? *dev->dma_mask : 0); + __entry->dev_addr = dev_addr; + __entry->size = size; + __entry->force = is_swiotlb_force_bounce(dev); + ), + + TP_printk("dev_name: %s dma_mask=%llx dev_addr=%llx size=%zu %s", + __get_str(dev_name), + __entry->dma_mask, + (unsigned long long)__entry->dev_addr, + __entry->size, + __entry->force ? "FORCE" : "NORMAL") +); + #endif /* _TRACE_SWIOTLB_H */ /* This part must be outside protection */ diff --git a/kernel/dma/common-swiotlb.c b/kernel/dma/common-swiotlb.c index 553325d5c9cd..e3676a8358f2 100644 --- a/kernel/dma/common-swiotlb.c +++ b/kernel/dma/common-swiotlb.c @@ -46,6 +46,7 @@ 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) { + trace_swiotlb_unbounced(dev, phys_to_dma(dev, tlb_addr), mapping_size); /* * First, sync the memory before unmapping the entry */ -- 2.31.1