From patchwork Fri Aug 13 06:53:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WW9uZyBXdSAo5ZC05YuHKQ==?= X-Patchwork-Id: 497209 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT 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 5FC13C4338F for ; Fri, 13 Aug 2021 06:55:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4AF1960FC3 for ; Fri, 13 Aug 2021 06:55:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238882AbhHMGzr (ORCPT ); Fri, 13 Aug 2021 02:55:47 -0400 Received: from mailgw01.mediatek.com ([60.244.123.138]:37212 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S238879AbhHMGzn (ORCPT ); Fri, 13 Aug 2021 02:55:43 -0400 X-UUID: 5c2eadb220b04228b6cc6d47d06b030c-20210813 X-UUID: 5c2eadb220b04228b6cc6d47d06b030c-20210813 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1822091167; Fri, 13 Aug 2021 14:55:12 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 13 Aug 2021 14:55:11 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 13 Aug 2021 14:55:10 +0800 From: Yong Wu To: Joerg Roedel , Rob Herring , Matthias Brugger , Will Deacon , Robin Murphy CC: Krzysztof Kozlowski , Evan Green , Tomasz Figa , Tomasz Figa , , , , , , , , , Nicolas Boichat , , Subject: [PATCH v2 11/29] iommu/mediatek: Always pm_runtime_get while tlb flush Date: Fri, 13 Aug 2021 14:53:06 +0800 Message-ID: <20210813065324.29220-12-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210813065324.29220-1-yong.wu@mediatek.com> References: <20210813065324.29220-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Prepare for 2 HWs that sharing pgtable in different power-domains. The previous SoC don't have PM. Only mt8192 has power-domain, and it is display's power-domain which nearly always is enabled. When there are 2 M4U HWs, it may has problem. In this function, we get the pm_status via the m4u dev, but it don't reflect the real power-domain status of the HW since there may be other HW also use that power-domain. Currently we could not get the real power-domain status, thus always pm_runtime_get here. Prepare for mt8195, thus, no need fix tags here. This patch may drop the performance, we expect the user could pm_runtime_get_sync before dma_alloc_attrs which need tlb ops. Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index add23a36a5e2..abc721a1da21 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -238,8 +238,11 @@ static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size, for_each_m4u(data, head) { if (has_pm) { - if (pm_runtime_get_if_in_use(data->dev) <= 0) + ret = pm_runtime_resume_and_get(data->dev); + if (ret < 0) { + dev_err(data->dev, "tlb flush: pm get fail %d.\n", ret); continue; + } } spin_lock_irqsave(&data->tlb_lock, flags);