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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id F2546CD6E6F for ; Tue, 2 Jun 2026 10:47:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0E71510EEDC; Tue, 2 Jun 2026 10:47:07 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="XCUkcrQB"; dkim-atps=neutral Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by gabe.freedesktop.org (Postfix) with ESMTPS id 99D7210EED8 for ; Tue, 2 Jun 2026 10:47:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780397223; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=UP0YTUy7zkrIojybqq6QMy6i41tG54VrVzfjKAt98ek=; b=XCUkcrQBt+b1LKpc4JzVt9Jy2ALSHyw7F370U5NRi8+Fre4NTVkjMMoQWvE6WpHzbjCMytCP1E+Z4DB3wuqsrtSB2SCbaHqOxFi8uAJSrZ+gmOqQ7qTsU3G6Cmd3Wrn772EuNXRyweMawWFGdKP26IZCgHm24OZUa+id0rERlCE= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R161e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=maildocker-contentspam011083073210; MF=guanghuifeng@linux.alibaba.com; NM=1; PH=DS; RN=28; SR=0; TI=SMTPD_---0X44E952_1780397220; Received: from VM20241011-104.tbsite.net(mailfrom:guanghuifeng@linux.alibaba.com fp:SMTPD_---0X44E952_1780397220 cluster:ay36) by smtp.aliyun-inc.com; Tue, 02 Jun 2026 18:47:00 +0800 From: Guanghui Feng To: adrian.larumbe@collabora.com, airlied@gmail.com, alex@shazbot.org, baolu.lu@linux.intel.com, boris.brezillon@collabora.com, dri-devel@lists.freedesktop.org, dwmw2@infradead.org, iommu@lists.linux.dev, jgg@ziepe.ca, joro@8bytes.org, kevin.tian@intel.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, liviu.dudau@arm.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, oliver.yang@linux.alibaba.com, robh@kernel.org, robin.murphy@arm.com, shiyu.zsq@linux.alibaba.com, steven.price@arm.com, suravee.suthikulpanit@amd.com, tzimmermann@suse.de, wei.guo.simon@linux.alibaba.com, will@kernel.org, xlpang@linux.alibaba.com Cc: alikernel-developer@linux.alibaba.com Subject: [PATCH v2 13/30] iommu/fsl_pamu: implement iova_to_phys_length Date: Tue, 2 Jun 2026 18:46:20 +0800 Message-ID: <20260602104637.1219810-14-guanghuifeng@linux.alibaba.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20260602104637.1219810-1-guanghuifeng@linux.alibaba.com> References: <20260531093637.3893199-1-guanghuifeng@linux.alibaba.com> <20260602104637.1219810-1-guanghuifeng@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Implement iova_to_phys_length for FSL PAMU IOMMU driver, returning the actual PTE mapping size. Signed-off-by: Guanghui Feng --- drivers/iommu/fsl_pamu_domain.c | 28 ++++++++++++++++++++++++---- 1 file changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c index 9664ef9840d2..643984ac6ae1 100644 --- a/drivers/iommu/fsl_pamu_domain.c +++ b/drivers/iommu/fsl_pamu_domain.c @@ -169,12 +169,32 @@ static void attach_device(struct fsl_dma_domain *dma_domain, int liodn, struct d spin_unlock_irqrestore(&device_domain_lock, flags); } -static phys_addr_t fsl_pamu_iova_to_phys(struct iommu_domain *domain, - dma_addr_t iova) +static phys_addr_t fsl_pamu_iova_to_phys_length(struct iommu_domain *domain, + dma_addr_t iova, + size_t *mapped_length) { + if (mapped_length) + *mapped_length = 0; + if (iova < domain->geometry.aperture_start || iova > domain->geometry.aperture_end) - return 0; + return PHYS_ADDR_MAX; + + /* + * PAMU configures exactly one Primary PAACE entry per LIODN with the + * Multi-Window (MW) bit cleared and ATM = PAACE_ATM_WINDOW_XLATE, + * WBAL/TWBAL = 0. That is, every LIODN is backed by a single hardware + * mapping window of fixed size (1ULL << 36, i.e. 64GB, see + * pamu_config_ppaace()) performing an identity translation. The driver + * does not split this window into SPAACE sub-windows, so the entire + * aperture is one PAACE "PTE" entry. Return that single entry's size + * as mapped_length, matching the iova_to_phys_length contract that + * mapped_length reports the full size of the mapping entry which + * covers iova (not the remaining bytes from iova to its end). + */ + if (mapped_length) + *mapped_length = 1ULL << 36; + return iova; } @@ -435,7 +455,7 @@ static const struct iommu_ops fsl_pamu_ops = { .device_group = fsl_pamu_device_group, .default_domain_ops = &(const struct iommu_domain_ops) { .attach_dev = fsl_pamu_attach_device, - .iova_to_phys = fsl_pamu_iova_to_phys, + .iova_to_phys_length = fsl_pamu_iova_to_phys_length, .free = fsl_pamu_domain_free, } }; -- 2.43.7