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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58AE2C433F5 for ; Wed, 17 Nov 2021 21:15:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3EFC161B71 for ; Wed, 17 Nov 2021 21:15:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233060AbhKQVSw (ORCPT ); Wed, 17 Nov 2021 16:18:52 -0500 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:58385 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236886AbhKQVSb (ORCPT ); Wed, 17 Nov 2021 16:18:31 -0500 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailnew.nyi.internal (Postfix) with ESMTP id 1A2645806D3; Wed, 17 Nov 2021 16:15:32 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute4.internal (MEProxy); Wed, 17 Nov 2021 16:15:32 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svenpeter.dev; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm3; bh=mT0wnBBvzdwTn WLPC9AuFvDLgJbzDS9nH0+PdHCOPmI=; b=Hyb0PqficAU0VQumZ7+H0pDKZUAVE 5XBlkFfmehx45j9lWRYfguU2Qq4MGmzsJyg6oOirv73l8pvDqmi54LRniooSvJV2 tmX3ptZAbKUMC7uj8qLNlwU0ZmKhSh2UlLcI9eQWGiIdqsslgFlq8I06amiCzv3I AeW4t+YoO+5WZ5WnH5qnxZvtEqZio7XRdX0fpCM/UZEuxA1bugjmrMq1C44VEPmQ nLoAtk4HJJPXrFIA6j6EAxQOipJ18yHEfvS6ZEvUGLZcKri8WjROv5+6D9RdI0sR rHs7dpHP2q706y5+dmvV70ZXpxP+bQZrP/k90GrvNbZjJccT488T+YBBQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=mT0wnBBvzdwTnWLPC9AuFvDLgJbzDS9nH0+PdHCOPmI=; b=IsYHOIOK tcYaz1g8U5/xHBRNpZ0o3Qpyu/9ZSb5jAMA24Q4noDL+FkUFpIDv/gVENR8H+ea3 C7G2rV0uR6I/CQLGj6Am9UVAfvsn8o+OnM5d6hRutF/pVLW4d+G6PeXXBRR3zCbs PGSmELjHwOgesGFUeV6VD+p5fgn5h3YNDNZrTEewCvso+xJ4CR0xcuDIhiGnuKA0 OkTkm1joWKxn1Q4jQyLciM/rd5jMdTjWAuhGcv+/o7vuK49CM3dsVwUwGVFUXIhZ cftS61HIIF4sl/WN5l7nVh/PSzxPSUJf/Z9dYJTQs0wJVm1Jl6MDYTG28YLHLB/F 1vzoYElooUz0+A== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvuddrfeeggddugedtucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpefuvhgvnhcu rfgvthgvrhcuoehsvhgvnhesshhvvghnphgvthgvrhdruggvvheqnecuggftrfgrthhtvg hrnhepteejvdehleduvddthfetgeeljeegfeeludetkedtkedvteffvdejhfefvdevtedt necuffhomhgrihhnpegtfhhgrdgrphhplhgvnecuvehluhhsthgvrhfuihiivgeptdenuc frrghrrghmpehmrghilhhfrhhomhepshhvvghnsehsvhgvnhhpvghtvghrrdguvghv X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 17 Nov 2021 16:15:30 -0500 (EST) From: Sven Peter To: iommu@lists.linux-foundation.org, Robin Murphy Cc: Sven Peter , Joerg Roedel , Will Deacon , Rob Herring , Janne Grunau , Hector Martin , Alyssa Rosenzweig , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/4] iommu/io-pgtable: Add DART PTE support for t6000 Date: Wed, 17 Nov 2021 22:15:08 +0100 Message-Id: <20211117211509.28066-4-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20211117211509.28066-1-sven@svenpeter.dev> References: <20211117211509.28066-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The DARTs present in the M1 Pro/Max SoC support a 42bit physical address space by shifting the paddr and extending its mask inside the PTE. Signed-off-by: Sven Peter --- drivers/iommu/io-pgtable-arm.c | 30 +++++++++++++++++++++++++++++- include/linux/io-pgtable.h | 2 ++ 2 files changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index a8c660b8b3e9..be66774aaf70 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -137,6 +137,11 @@ #define APPLE_DART_PTE_SUBPAGE_START GENMASK_ULL(63, 52) #define APPLE_DART_PTE_SUBPAGE_END GENMASK_ULL(51, 40) +#define APPLE_DART_PADDR_MASK_PS_36BIT GENMASK_ULL(35, 12) +#define APPLE_DART_PADDR_SHIFT_PS_36BIT (0) +#define APPLE_DART_PADDR_MASK_PS_42BIT GENMASK_ULL(37, 10) +#define APPLE_DART_PADDR_SHIFT_PS_42BIT (4) + /* IOPTE accessors */ #define iopte_deref(pte,d) __va(iopte_to_paddr(pte, d)) @@ -171,6 +176,13 @@ static arm_lpae_iopte paddr_to_iopte(phys_addr_t paddr, { arm_lpae_iopte pte = paddr; + if (data->iop.fmt == APPLE_DART) { + pte = paddr >> data->iop.cfg.apple_dart_cfg.paddr_shift; + pte &= data->iop.cfg.apple_dart_cfg.paddr_mask; + + return pte; + } + /* Of the bits which overlap, either 51:48 or 15:12 are always RES0 */ return (pte | (pte >> (48 - 12))) & ARM_LPAE_PTE_ADDR_MASK; } @@ -180,6 +192,12 @@ static phys_addr_t iopte_to_paddr(arm_lpae_iopte pte, { u64 paddr = pte & ARM_LPAE_PTE_ADDR_MASK; + if (data->iop.fmt == APPLE_DART) { + paddr = pte & data->iop.cfg.apple_dart_cfg.paddr_mask; + paddr <<= data->iop.cfg.apple_dart_cfg.paddr_shift; + return paddr; + } + if (ARM_LPAE_GRANULE(data) < SZ_64K) return paddr; @@ -1122,8 +1140,18 @@ apple_dart_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie) struct arm_lpae_io_pgtable *data; int i; - if (cfg->oas > 36) + switch (cfg->oas) { + case 36: + cfg->apple_dart_cfg.paddr_shift = APPLE_DART_PADDR_SHIFT_PS_36BIT; + cfg->apple_dart_cfg.paddr_mask = APPLE_DART_PADDR_MASK_PS_36BIT; + break; + case 42: + cfg->apple_dart_cfg.paddr_shift = APPLE_DART_PADDR_SHIFT_PS_42BIT; + cfg->apple_dart_cfg.paddr_mask = APPLE_DART_PADDR_MASK_PS_42BIT; + break; + default: return NULL; + } data = arm_lpae_alloc_pgtable(cfg); if (!data) diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 86af6f0a00a2..4e26ebb0be93 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -136,6 +136,8 @@ struct io_pgtable_cfg { struct { u64 ttbr[4]; u32 n_ttbrs; + u32 paddr_shift; + u64 paddr_mask; } apple_dart_cfg; }; }; -- 2.25.1