From patchwork Fri Jun 21 18:46:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 13708006 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 DE00BC27C4F for ; Fri, 21 Jun 2024 18:48:00 +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=d1GfRY9DWDGItVSEa8vjJGzLIc2rb9lvC9MEkCNfiyE=; b=LEAChQPbeWhvQeMi89nomC7+f2 WJt1FZMHsL6l1qIf/Lz0eL15GvyDELKnpIA+i8hhyqvCkDOpRbBJKuPXZOlJk8F30mPvOyU/GDEFb crBd7Jv51oa8oGZVcAiVVYD952L4ubK9D2E6z/+G997/nLV5gBwf4yu13MnR1MQKOFHokr/Jpvj5R NlLQ7fsGq5xVP6NPOgFYJjXsoF+XvVU0Bp7yutevEu4cYVdk9vZzAo3wmz7F6Com99ZZVIuy6ucfD zWtQi7zXPth22PnKpjegXxXIRklyIcm8RAKYDUW0c6/OSV7M3HiRpazekd4/qG/13zAoVbs/IoKnj WJnSjVLg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sKjIZ-0000000AGuh-26i4; Fri, 21 Jun 2024 18:47:47 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sKjI1-0000000AGbr-245M for linux-arm-kernel@lists.infradead.org; Fri, 21 Jun 2024 18:47:15 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 99A57143D; Fri, 21 Jun 2024 11:47:36 -0700 (PDT) Received: from e121345-lin.cambridge.arm.com (e121345-lin.cambridge.arm.com [10.1.196.40]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6B5AA3F6A8; Fri, 21 Jun 2024 11:47:09 -0700 (PDT) From: Robin Murphy To: Will Deacon , Joerg Roedel Cc: linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, devicetree@vger.kernel.org, Rob Herring , Saravana Kannan , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , "Rafael J. Wysocki" , Len Brown , Jean-Philippe Brucker , Andy Shevchenko Subject: [PATCH v2 4/4] iommu: Remove iommu_fwspec ops Date: Fri, 21 Jun 2024 19:46:39 +0100 Message-Id: <42722975eb1309a3e43f58099ff5b6c7bfb23d3d.1718994350.git.robin.murphy@arm.com> X-Mailer: git-send-email 2.39.2.101.g768bb238c484.dirty In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240621_114713_766690_EA9DCCAA X-CRM114-Status: GOOD ( 14.50 ) 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 The ops in iommu_fwspec are only needed for the early configuration and probe process, and by now are easy enough to derive on-demand in those couple of places which need them, so remove the redundant stored copy. Signed-off-by: Robin Murphy --- drivers/iommu/iommu-priv.h | 5 +++++ drivers/iommu/iommu.c | 11 ++--------- drivers/iommu/of_iommu.c | 4 +++- include/linux/iommu.h | 2 -- 4 files changed, 10 insertions(+), 12 deletions(-) diff --git a/drivers/iommu/iommu-priv.h b/drivers/iommu/iommu-priv.h index 078cafcf49b4..a34efed2884b 100644 --- a/drivers/iommu/iommu-priv.h +++ b/drivers/iommu/iommu-priv.h @@ -19,6 +19,11 @@ static inline const struct iommu_ops *dev_iommu_ops(struct device *dev) const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode); +static inline const struct iommu_ops *iommu_fwspec_ops(struct iommu_fwspec *fwspec) +{ + return iommu_ops_from_fwnode(fwspec ? fwspec->iommu_fwnode : NULL); +} + int iommu_group_replace_domain(struct iommu_group *group, struct iommu_domain *new_domain); diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 7618c4285cf9..e15ae1dd494b 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -510,7 +510,6 @@ DEFINE_MUTEX(iommu_probe_device_lock); static int __iommu_probe_device(struct device *dev, struct list_head *group_list) { const struct iommu_ops *ops; - struct iommu_fwspec *fwspec; struct iommu_group *group; struct group_device *gdev; int ret; @@ -523,12 +522,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list * be present, and that any of their registered instances has suitable * ops for probing, and thus cheekily co-opt the same mechanism. */ - fwspec = dev_iommu_fwspec_get(dev); - if (fwspec && fwspec->ops) - ops = fwspec->ops; - else - ops = iommu_ops_from_fwnode(NULL); - + ops = iommu_fwspec_ops(dev_iommu_fwspec_get(dev)); if (!ops) return -ENODEV; /* @@ -2831,7 +2825,7 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode) return -EPROBE_DEFER; if (fwspec) - return ops == fwspec->ops ? 0 : -EINVAL; + return ops == iommu_fwspec_ops(fwspec) ? 0 : -EINVAL; if (!dev_iommu_get(dev)) return -ENOMEM; @@ -2843,7 +2837,6 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode) fwnode_handle_get(iommu_fwnode); fwspec->iommu_fwnode = iommu_fwnode; - fwspec->ops = ops; dev_iommu_fwspec_set(dev, fwspec); return 0; } diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index c946521a5906..559c5db78edb 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -17,6 +17,8 @@ #include #include +#include "iommu-priv.h" + static int of_iommu_xlate(struct device *dev, struct of_phandle_args *iommu_spec) { @@ -32,7 +34,7 @@ static int of_iommu_xlate(struct device *dev, if (ret) return ret; - ops = dev_iommu_fwspec_get(dev)->ops; + ops = iommu_ops_from_fwnode(&iommu_spec->np->fwnode); if (!ops->of_xlate || !try_module_get(ops->owner)) return -ENODEV; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 81893aad9ee4..11ae1750cb1d 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -968,7 +968,6 @@ extern struct iommu_group *generic_single_device_group(struct device *dev); /** * struct iommu_fwspec - per-device IOMMU instance data - * @ops: ops for this device's IOMMU * @iommu_fwnode: firmware handle for this device's IOMMU * @flags: IOMMU_FWSPEC_* flags * @num_ids: number of associated device IDs @@ -979,7 +978,6 @@ extern struct iommu_group *generic_single_device_group(struct device *dev); * consumers. */ struct iommu_fwspec { - const struct iommu_ops *ops; struct fwnode_handle *iommu_fwnode; u32 flags; unsigned int num_ids;