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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63F55C74A5B for ; Thu, 11 Jul 2019 17:29:50 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 39E4E20863 for ; Thu, 11 Jul 2019 17:29:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="PHeW2r43" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 39E4E20863 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 735845498; Thu, 11 Jul 2019 17:28:56 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id C1647547A for ; Thu, 11 Jul 2019 17:20:11 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id E9AF9886 for ; Thu, 11 Jul 2019 17:20:10 +0000 (UTC) Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6DC47216FD; Thu, 11 Jul 2019 17:20:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562865604; bh=vjurb9gASc7UQ1CM+sFuDlXOAychhDK4+6LHAFBppGs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PHeW2r43yRGbNN/e+vJvXzzodtzLJ4fyahLliQtr1PzxicBi9GVBaQMP1wjDqanh5 6B2mY7/hioiwfry1O51xrWADVL9Y/1NzhD8WNi3nVh0qdm210LjjOhpUx1mVWvSIhG yH6u14TNapJzFuOeroLbPGorHEWjVDwa/5OBK3hg= From: Will Deacon To: iommu@lists.linux-foundation.org Subject: [RFC PATCH v2 11/19] iommu/io-pgtable: Remove unused ->tlb_sync() callback Date: Thu, 11 Jul 2019 18:19:19 +0100 Message-Id: <20190711171927.28803-12-will@kernel.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190711171927.28803-1-will@kernel.org> References: <20190711171927.28803-1-will@kernel.org> Cc: Vijay Kilary , Jean-Philippe Brucker , Will Deacon , Jan Glauber , Alex Williamson , Jayachandran Chandrasekharan Nair , Jon Masters , Robin Murphy X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org The ->tlb_sync() callback is no longer used, so it can be removed. Signed-off-by: Will Deacon --- drivers/gpu/drm/panfrost/panfrost_mmu.c | 1 - drivers/iommu/arm-smmu-v3.c | 8 -------- drivers/iommu/arm-smmu.c | 17 +++++++++-------- drivers/iommu/io-pgtable-arm-v7s.c | 6 ------ drivers/iommu/io-pgtable-arm.c | 6 ------ drivers/iommu/ipmmu-vmsa.c | 1 - drivers/iommu/msm_iommu.c | 20 +++++++------------- drivers/iommu/mtk_iommu.c | 1 - drivers/iommu/qcom_iommu.c | 1 - include/linux/io-pgtable.h | 9 --------- 10 files changed, 16 insertions(+), 54 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index d2cfa0ed32b8..8241656adc98 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -261,7 +261,6 @@ static const struct iommu_flush_ops mmu_tlb_ops = { .tlb_flush_all = mmu_tlb_inv_context_s1, .tlb_flush_walk = mmu_tlb_flush_walk, .tlb_flush_leaf = mmu_tlb_flush_leaf, - .tlb_sync = mmu_tlb_sync_context, }; static const char *access_type_name(struct panfrost_device *pfdev, diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index feea1b6ca127..a245c9e16077 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -1539,13 +1539,6 @@ static int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain, } /* IO_PGTABLE API */ -static void arm_smmu_tlb_sync(void *cookie) -{ - struct arm_smmu_domain *smmu_domain = cookie; - - arm_smmu_cmdq_issue_sync(smmu_domain->smmu); -} - static void arm_smmu_tlb_inv_context(void *cookie) { struct arm_smmu_domain *smmu_domain = cookie; @@ -1628,7 +1621,6 @@ static const struct iommu_flush_ops arm_smmu_flush_ops = { .tlb_flush_walk = arm_smmu_tlb_inv_walk, .tlb_flush_leaf = arm_smmu_tlb_inv_leaf, .tlb_add_page = arm_smmu_tlb_inv_page_nosync, - .tlb_sync = arm_smmu_tlb_sync, }; /* IOMMU API */ diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 30ed97cd3993..28da70972b1b 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -254,7 +254,8 @@ enum arm_smmu_domain_stage { struct arm_smmu_flush_ops { struct iommu_flush_ops tlb; void (*tlb_inv_range)(unsigned long iova, size_t size, size_t granule, - bool leaf, void *cookie) + bool leaf, void *cookie); + void (*tlb_sync)(void *cookie); }; struct arm_smmu_domain { @@ -542,7 +543,7 @@ static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size, * On MMU-401 at least, the cost of firing off multiple TLBIVMIDs appears * almost negligible, but the benefit of getting the first one in as far ahead * of the sync as possible is significant, hence we don't just make this a - * no-op and set .tlb_sync to arm_smmu_inv_context_s2() as you might think. + * no-op and set .tlb_sync to arm_smmu_tlb_inv_context_s2() as you might think. */ static void arm_smmu_tlb_inv_vmid_nosync(unsigned long iova, size_t size, size_t granule, bool leaf, void *cookie) @@ -563,7 +564,7 @@ static void arm_smmu_tlb_inv_walk(unsigned long iova, size_t size, const struct arm_smmu_flush_ops *ops = smmu_domain->flush_ops; ops->tlb_inv_range(iova, size, granule, false, cookie); - ops->tlb.tlb_sync(cookie); + ops->tlb_sync(cookie); } static void arm_smmu_tlb_inv_leaf(unsigned long iova, size_t size, @@ -573,7 +574,7 @@ static void arm_smmu_tlb_inv_leaf(unsigned long iova, size_t size, const struct arm_smmu_flush_ops *ops = smmu_domain->flush_ops; ops->tlb_inv_range(iova, size, granule, true, cookie); - ops->tlb.tlb_sync(cookie); + ops->tlb_sync(cookie); } static void arm_smmu_tlb_add_page(unsigned long iova, size_t granule, @@ -591,9 +592,9 @@ static const struct arm_smmu_flush_ops arm_smmu_s1_tlb_ops = { .tlb_flush_walk = arm_smmu_tlb_inv_walk, .tlb_flush_leaf = arm_smmu_tlb_inv_leaf, .tlb_add_page = arm_smmu_tlb_add_page, - .tlb_sync = arm_smmu_tlb_sync_context, }, .tlb_inv_range = arm_smmu_tlb_inv_range_nosync, + .tlb_sync = arm_smmu_tlb_sync_context, }; static const struct arm_smmu_flush_ops arm_smmu_s2_tlb_ops_v2 = { @@ -602,9 +603,9 @@ static const struct arm_smmu_flush_ops arm_smmu_s2_tlb_ops_v2 = { .tlb_flush_walk = arm_smmu_tlb_inv_walk, .tlb_flush_leaf = arm_smmu_tlb_inv_leaf, .tlb_add_page = arm_smmu_tlb_add_page, - .tlb_sync = arm_smmu_tlb_sync_context, }, .tlb_inv_range = arm_smmu_tlb_inv_range_nosync, + .tlb_sync = arm_smmu_tlb_sync_context, }; static const struct arm_smmu_flush_ops arm_smmu_s2_tlb_ops_v1 = { @@ -613,9 +614,9 @@ static const struct arm_smmu_flush_ops arm_smmu_s2_tlb_ops_v1 = { .tlb_flush_walk = arm_smmu_tlb_inv_walk, .tlb_flush_leaf = arm_smmu_tlb_inv_leaf, .tlb_add_page = arm_smmu_tlb_add_page, - .tlb_sync = arm_smmu_tlb_sync_vmid, }, .tlb_inv_range = arm_smmu_tlb_inv_vmid_nosync, + .tlb_sync = arm_smmu_tlb_sync_vmid, }; static irqreturn_t arm_smmu_context_fault(int irq, void *dev) @@ -1390,7 +1391,7 @@ static void arm_smmu_iotlb_sync(struct iommu_domain *domain, if (smmu_domain->flush_ops) { arm_smmu_rpm_get(smmu); - smmu_domain->flush_ops->tlb.tlb_sync(smmu_domain); + smmu_domain->flush_ops->tlb_sync(smmu_domain); arm_smmu_rpm_put(smmu); } } diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c index d94bcad49888..5a4a534c2782 100644 --- a/drivers/iommu/io-pgtable-arm-v7s.c +++ b/drivers/iommu/io-pgtable-arm-v7s.c @@ -824,17 +824,11 @@ static void dummy_tlb_add_page(unsigned long iova, size_t granule, void *cookie) dummy_tlb_flush(iova, granule, granule, cookie); } -static void dummy_tlb_sync(void *cookie) -{ - WARN_ON(cookie != cfg_cookie); -} - static const struct iommu_flush_ops dummy_tlb_ops = { .tlb_flush_all = dummy_tlb_flush_all, .tlb_flush_walk = dummy_tlb_flush, .tlb_flush_leaf = dummy_tlb_flush, .tlb_add_page = dummy_tlb_add_page, - .tlb_sync = dummy_tlb_sync, }; #define __FAIL(ops) ({ \ diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index b6be7686534b..6fb83910bac5 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -1091,17 +1091,11 @@ static void dummy_tlb_add_page(unsigned long iova, size_t granule, void *cookie) dummy_tlb_flush(iova, granule, granule, cookie); } -static void dummy_tlb_sync(void *cookie) -{ - WARN_ON(cookie != cfg_cookie); -} - static const struct iommu_flush_ops dummy_tlb_ops __initconst = { .tlb_flush_all = dummy_tlb_flush_all, .tlb_flush_walk = dummy_tlb_flush, .tlb_flush_leaf = dummy_tlb_flush, .tlb_add_page = dummy_tlb_add_page, - .tlb_sync = dummy_tlb_sync, }; static void __init arm_lpae_dump_ops(struct io_pgtable_ops *ops) diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 9b961c4cd4c3..651c3cf7b124 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -364,7 +364,6 @@ static const struct iommu_flush_ops ipmmu_flush_ops = { .tlb_flush_all = ipmmu_tlb_flush_all, .tlb_flush_walk = ipmmu_tlb_flush, .tlb_flush_leaf = ipmmu_tlb_flush, - .tlb_sync = ipmmu_tlb_flush_all, }; /* ----------------------------------------------------------------------------- diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index b71485e98e76..d9c3d1816a29 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -181,28 +181,16 @@ static void __flush_iotlb_range(unsigned long iova, size_t size, return; } -static void __flush_iotlb_sync(void *cookie) -{ - /* - * Nothing is needed here, the barrier to guarantee - * completion of the tlb sync operation is implicitly - * taken care when the iommu client does a writel before - * kick starting the other master. - */ -} - static void __flush_iotlb_walk(unsigned long iova, size_t size, size_t granule, void *cookie) { __flush_iotlb_range(iova, size, granule, false, cookie); - __flush_iotlb_sync(cookie); } static void __flush_iotlb_leaf(unsigned long iova, size_t size, size_t granule, void *cookie) { __flush_iotlb_range(iova, size, granule, true, cookie); - __flush_iotlb_sync(cookie); } static void __flush_iotlb_page(unsigned long iova, size_t granule, void *cookie) @@ -215,7 +203,6 @@ static const struct iommu_flush_ops msm_iommu_flush_ops = { .tlb_flush_walk = __flush_iotlb_walk, .tlb_flush_leaf = __flush_iotlb_leaf, .tlb_add_page = __flush_iotlb_page, - .tlb_sync = __flush_iotlb_sync, }; static int msm_iommu_alloc_ctx(unsigned long *map, int start, int end) @@ -725,6 +712,13 @@ static struct iommu_ops msm_iommu_ops = { .detach_dev = msm_iommu_detach_dev, .map = msm_iommu_map, .unmap = msm_iommu_unmap, + /* + * Nothing is needed here, the barrier to guarantee + * completion of the tlb sync operation is implicitly + * taken care when the iommu client does a writel before + * kick starting the other master. + */ + .iotlb_sync = NULL, .iova_to_phys = msm_iommu_iova_to_phys, .add_device = msm_iommu_add_device, .remove_device = msm_iommu_remove_device, diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 639c50420fc3..6dfb55014550 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -221,7 +221,6 @@ static const struct iommu_flush_ops mtk_iommu_flush_ops = { .tlb_flush_walk = mtk_iommu_tlb_flush_walk, .tlb_flush_leaf = mtk_iommu_tlb_flush_leaf, .tlb_add_page = mtk_iommu_tlb_flush_page_nosync, - .tlb_sync = mtk_iommu_tlb_sync, }; static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c index ac37ced28156..fb5d6c4862b4 100644 --- a/drivers/iommu/qcom_iommu.c +++ b/drivers/iommu/qcom_iommu.c @@ -200,7 +200,6 @@ static const struct iommu_flush_ops qcom_flush_ops = { .tlb_flush_walk = qcom_iommu_tlb_flush_walk, .tlb_flush_leaf = qcom_iommu_tlb_flush_leaf, .tlb_add_page = qcom_iommu_tlb_add_page, - .tlb_sync = qcom_iommu_tlb_sync, }; static irqreturn_t qcom_iommu_fault(int irq, void *dev) diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 99e04bd2baa1..843310484fe2 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -30,9 +30,6 @@ enum io_pgtable_fmt { * for IOMMUs that cannot batch TLB invalidation operations * efficiently and are therefore better suited to issuing them * early rather than deferring them until iommu_tlb_sync(). - * @tlb_sync: Ensure any queued TLB invalidation has taken effect, and - * any corresponding page table updates are visible to the - * IOMMU. * * Note that these can all be called in atomic context and must therefore * not block. @@ -44,7 +41,6 @@ struct iommu_flush_ops { void (*tlb_flush_leaf)(unsigned long iova, size_t size, size_t granule, void *cookie); void (*tlb_add_page)(unsigned long iova, size_t granule, void *cookie); - void (*tlb_sync)(void *cookie); }; /** @@ -218,11 +214,6 @@ io_pgtable_tlb_add_page(struct io_pgtable *iop, unsigned long iova, iop->cfg.tlb->tlb_add_page(iova, granule, iop->cookie); } -static inline void io_pgtable_tlb_sync(struct io_pgtable *iop) -{ - iop->cfg.tlb->tlb_sync(iop->cookie); -} - /** * struct io_pgtable_init_fns - Alloc/free a set of page tables for a * particular format. -- 2.11.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu