From patchwork Wed Dec 8 12:07:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dafna Hirschfeld X-Patchwork-Id: 523222 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 1D6BDC433EF for ; Wed, 8 Dec 2021 12:08:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232982AbhLHMLn (ORCPT ); Wed, 8 Dec 2021 07:11:43 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:44478 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232909AbhLHMLl (ORCPT ); Wed, 8 Dec 2021 07:11:41 -0500 Received: from localhost.localdomain (unknown [IPv6:2a00:c281:1230:3700:51d0:7039:5913:64d3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: dafna) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id E7B1B1F45C87; Wed, 8 Dec 2021 12:08:07 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=collabora.com; s=mail; t=1638965289; bh=/ksqLGRqcx9RPvezQU0f63T25oDST3xu9zSisBbGyqQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=i/LWg2n8z2KMdp8HIIjkNn1xo/fr0fLDwfwLt7svKE9NR2p3Gf9/2bv4lH9xOHzpD /+dwsNPVKbByunLTi8ZVdEh4acbq+KKVnEbl4+2fPAhJYOOgxUwed1R6yu/Nmqni8q XZuGjkKlFUI5u6zNGwHf4UlNMaOncuL2fzEHgM+x2giWgW7hjwEcVAAwWlbBnzXFJv hMkCCAU5b5YKfQATsvJNRoqjzqwX1opyFxS1ZipzmaJviXYtelzgCiuGzLlpsbRNUo R6DEHUTh7mfJezgGkhq1Ranbr+Fuq6RSOXh38z18YtmYh8z2t9QPuS7SiUdNBzf+ft QeIZilzrM/dhQ== From: Dafna Hirschfeld To: iommu@lists.linux-foundation.org, Yong Wu , Joerg Roedel , Will Deacon , Matthias Brugger , linux-mediatek@lists.infradead.org (moderated list:MEDIATEK IOMMU DRIVER), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-kernel@vger.kernel.org (open list), dafna.hirschfeld@collabora.com, kernel@collabora.com, linux-media@vger.kernel.org, sebastian.reichel@collabora.com Subject: [PATCH v2 1/5] iommu/mediatek: Remove for_each_m4u in tlb_sync_all Date: Wed, 8 Dec 2021 14:07:40 +0200 Message-Id: <20211208120744.2415-2-dafna.hirschfeld@collabora.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211208120744.2415-1-dafna.hirschfeld@collabora.com> References: <20211208120744.2415-1-dafna.hirschfeld@collabora.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Yong Wu The tlb_sync_all is called from these three functions: a) flush_iotlb_all: it will be called for each a iommu HW. b) tlb_flush_range_sync: it already has for_each_m4u. c) in irq: When IOMMU HW translation fault, Only need flush itself. Thus, No need for_each_m4u in this tlb_sync_all. Remove it. Signed-off-by: Yong Wu Reviewed-by: Dafna Hirschfeld --- drivers/iommu/mtk_iommu.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 507123ae7485..342aa562ab6a 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -210,17 +210,15 @@ static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom) static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data) { - for_each_m4u(data) { - if (pm_runtime_get_if_in_use(data->dev) <= 0) - continue; + if (pm_runtime_get_if_in_use(data->dev) <= 0) + return; - writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, - data->base + data->plat_data->inv_sel_reg); - writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); - wmb(); /* Make sure the tlb flush all done */ + writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, + data->base + data->plat_data->inv_sel_reg); + writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); + wmb(); /* Make sure the tlb flush all done */ - pm_runtime_put(data->dev); - } + pm_runtime_put(data->dev); } static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,