From patchwork Mon Oct 28 21:31:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 13854228 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 1C46CD5B158 for ; Mon, 28 Oct 2024 22:04:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=m061Pyg3UwMZEnlvYwP1sOYnaFDaV5Le181aUe2JWFs=; b=s1pbU/02TrUPLPm+v4KFhcqgQo csU6wS+CPMxJBQqCLAziACmGnOQ5F/O8jSjVyDkwZGYc8pARbfU+P2T9t7N31dPGoKZO7UJbb9dU+ plvtvAxjOIXn0Lkyr9MSOf0IXNeI9HaiKo5Wr4EoN++yRSWo7EDPBhg68FufnurpsZ8HWXN8V67Xc E40sV+z57UVdHGMjniLcMmMIzHYJ4ax5HuYBZvF/fL99bxRB91M/DDB9KAFm3gHqm/u0ihFcEnz8J nTybZ/riQ9IvEu5bQZCO3twoTmqmJ9GXKpGz7hR0EnigLa0CM1Riu/qibirZJzTeF6u6tn7GIoZ21 z8twsHNw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t5XqJ-0000000CSuy-3n0z; Mon, 28 Oct 2024 22:04:07 +0000 Received: from mail-pj1-x1031.google.com ([2607:f8b0:4864:20::1031]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t5XOX-0000000CM09-0GMM for linux-arm-kernel@lists.infradead.org; Mon, 28 Oct 2024 21:35:26 +0000 Received: by mail-pj1-x1031.google.com with SMTP id 98e67ed59e1d1-2e2b9480617so3805956a91.1 for ; Mon, 28 Oct 2024 14:35:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730151324; x=1730756124; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=m061Pyg3UwMZEnlvYwP1sOYnaFDaV5Le181aUe2JWFs=; b=Q2c5PL3IFY+zZgiXrtlOc8D2t5CVyF9HiFboAGGOgfxpGsbeuuQ4SEw+AXet40tcSQ hClznJInqCFedTm7Dc1WW0gAhJdxdx0fPNTUhE+yPSr9+Jv+HrtvLpfLzTaiZ7CSMGcZ 1f4fKjib2M0SUOgCacENiv39j6IOVm468Eeg63e7OJL+iqKlEpjIzu5xSxr6vT/t9dNb zyOoxtisAs86Qt3iRhAEQslLPccahsMIM5TBQwdDx9Pwm2jUoQPfRKYfNVYjmERbuVYp AvyWhWy2/VGQUXdxpmx4KTo4D3ZAcnj95EMRBIcNfr5XFD3RuAVYSYaad5zsFy8IGrmD yUTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730151324; x=1730756124; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=m061Pyg3UwMZEnlvYwP1sOYnaFDaV5Le181aUe2JWFs=; b=FGO6h6hKCng+y5PXD/zOsE+2m/13H+ZQnDkluKlhyFkfLv2CFodmlecL7qwJ3Hk/hM NsnHW7tZgIaKXHLSoP9NWEpwvPqwJ9GZPvVUvtmzALKx21CuLvHDFAwYqSiKpG+pQopl cEorWvgSHOmEGXpTwVisZA4O42fJlkvUsc287r3YFFZvDterSXSdIV3p11SgT6nudmvT fLir48iPspLhpnZkZUYPPA9Wmmn7UlVEC0IU7HM6QeivWntz+zQGyXmJVNWtVumGDHlJ 6VsFtoL2uu3sbQ/UbLloR4sKTSweG/G5dYtETs2nVlhZhg39xl1lzt063oS3upbwGwhv NHpQ== X-Forwarded-Encrypted: i=1; AJvYcCVNDzoVApNV3w65gdmnbN9+dioisU4hr4VNzgB29oaPyLuH5Szra6i54No33VTO70J0CjktGXERkWr/PEahdlWt@lists.infradead.org X-Gm-Message-State: AOJu0Yy2usgirCKg3hZufxo+uLv2YBPtFI+7G/m3XPX8VZH8bTmBur2p yzZqzsT9RbHTXkbc40Jt1lL7UbevqStsRiCt6Cda9U91uvPa8SVW X-Google-Smtp-Source: AGHT+IFMkNPD4yFz3qyWlzboYMBT0a0xBeKCCszOPUsi1vknNqZcTwRtbyVqgGg1MSNysN4Mc2hgGA== X-Received: by 2002:a17:90a:c90b:b0:2e2:e092:5323 with SMTP id 98e67ed59e1d1-2e8f11a9716mr11015208a91.29.1730151323871; Mon, 28 Oct 2024 14:35:23 -0700 (PDT) Received: from localhost ([2a00:79e1:2e00:1301:12e9:d196:a1e9:ab67]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e77e4c2a9dsm9890110a91.15.2024.10.28.14.35.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Oct 2024 14:35:23 -0700 (PDT) From: Rob Clark To: iommu@lists.linux.dev Cc: linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, Will Deacon , Robin Murphy , Mostafa Saleh , Rob Clark , Joerg Roedel , linux-arm-kernel@lists.infradead.org (moderated list:ARM SMMU DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v10 1/4] iommu/io-pgtable-arm: Make pgtable walker more generic Date: Mon, 28 Oct 2024 14:31:37 -0700 Message-ID: <20241028213146.238941-2-robdclark@gmail.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241028213146.238941-1-robdclark@gmail.com> References: <20241028213146.238941-1-robdclark@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241028_143525_138394_27D3DB96 X-CRM114-Status: GOOD ( 14.29 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Rob Clark We can re-use this basic pgtable walk logic in a few places. Signed-off-by: Rob Clark --- drivers/iommu/io-pgtable-arm.c | 67 ++++++++++++++++++++++------------ 1 file changed, 43 insertions(+), 24 deletions(-) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index 0e67f1721a3d..7e9c0f8ae138 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -749,33 +749,33 @@ static phys_addr_t arm_lpae_iova_to_phys(struct io_pgtable_ops *ops, } struct io_pgtable_walk_data { - struct iommu_dirty_bitmap *dirty; + struct io_pgtable *iop; + void *data; + int (*visit)(struct io_pgtable_walk_data *walk_data, int lvl, + arm_lpae_iopte *ptep, size_t size); unsigned long flags; u64 addr; const u64 end; }; -static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, - struct io_pgtable_walk_data *walk_data, - arm_lpae_iopte *ptep, - int lvl); +static int __arm_lpae_iopte_walk(struct arm_lpae_io_pgtable *data, + struct io_pgtable_walk_data *walk_data, + arm_lpae_iopte *ptep, + int lvl); -static int io_pgtable_visit_dirty(struct arm_lpae_io_pgtable *data, - struct io_pgtable_walk_data *walk_data, - arm_lpae_iopte *ptep, int lvl) +static int io_pgtable_visit(struct arm_lpae_io_pgtable *data, + struct io_pgtable_walk_data *walk_data, + arm_lpae_iopte *ptep, int lvl) { struct io_pgtable *iop = &data->iop; arm_lpae_iopte pte = READ_ONCE(*ptep); - if (iopte_leaf(pte, lvl, iop->fmt)) { - size_t size = ARM_LPAE_BLOCK_SIZE(lvl, data); + size_t size = ARM_LPAE_BLOCK_SIZE(lvl, data); + int ret = walk_data->visit(walk_data, lvl, ptep, size); + if (ret) + return ret; - if (iopte_writeable_dirty(pte)) { - iommu_dirty_bitmap_record(walk_data->dirty, - walk_data->addr, size); - if (!(walk_data->flags & IOMMU_DIRTY_NO_CLEAR)) - iopte_set_writeable_clean(ptep); - } + if (iopte_leaf(pte, lvl, iop->fmt)) { walk_data->addr += size; return 0; } @@ -784,13 +784,13 @@ static int io_pgtable_visit_dirty(struct arm_lpae_io_pgtable *data, return -EINVAL; ptep = iopte_deref(pte, data); - return __arm_lpae_iopte_walk_dirty(data, walk_data, ptep, lvl + 1); + return __arm_lpae_iopte_walk(data, walk_data, ptep, lvl + 1); } -static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, - struct io_pgtable_walk_data *walk_data, - arm_lpae_iopte *ptep, - int lvl) +static int __arm_lpae_iopte_walk(struct arm_lpae_io_pgtable *data, + struct io_pgtable_walk_data *walk_data, + arm_lpae_iopte *ptep, + int lvl) { u32 idx; int max_entries, ret; @@ -805,7 +805,7 @@ static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, for (idx = ARM_LPAE_LVL_IDX(walk_data->addr, lvl, data); (idx < max_entries) && (walk_data->addr < walk_data->end); ++idx) { - ret = io_pgtable_visit_dirty(data, walk_data, ptep + idx, lvl); + ret = io_pgtable_visit(data, walk_data, ptep + idx, lvl); if (ret) return ret; } @@ -813,6 +813,23 @@ static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, return 0; } +static int visit_dirty(struct io_pgtable_walk_data *walk_data, int lvl, + arm_lpae_iopte *ptep, size_t size) +{ + struct iommu_dirty_bitmap *dirty = walk_data->data; + + if (!iopte_leaf(*ptep, lvl, walk_data->iop->fmt)) + return 0; + + if (iopte_writeable_dirty(*ptep)) { + iommu_dirty_bitmap_record(dirty, walk_data->addr, size); + if (!(walk_data->flags & IOMMU_DIRTY_NO_CLEAR)) + iopte_set_writeable_clean(ptep); + } + + return 0; +} + static int arm_lpae_read_and_clear_dirty(struct io_pgtable_ops *ops, unsigned long iova, size_t size, unsigned long flags, @@ -821,7 +838,9 @@ static int arm_lpae_read_and_clear_dirty(struct io_pgtable_ops *ops, struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops); struct io_pgtable_cfg *cfg = &data->iop.cfg; struct io_pgtable_walk_data walk_data = { - .dirty = dirty, + .iop = &data->iop, + .data = dirty, + .visit = visit_dirty, .flags = flags, .addr = iova, .end = iova + size, @@ -836,7 +855,7 @@ static int arm_lpae_read_and_clear_dirty(struct io_pgtable_ops *ops, if (data->iop.fmt != ARM_64_LPAE_S1) return -EINVAL; - return __arm_lpae_iopte_walk_dirty(data, &walk_data, ptep, lvl); + return __arm_lpae_iopte_walk(data, &walk_data, ptep, lvl); } static void arm_lpae_restrict_pgsizes(struct io_pgtable_cfg *cfg)