From patchwork Tue Mar 6 03:27:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeffy Chen X-Patchwork-Id: 10260625 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CEB9B6037E for ; Tue, 6 Mar 2018 03:28:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA7EA28DC9 for ; Tue, 6 Mar 2018 03:28:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AD23028B56; Tue, 6 Mar 2018 03:28:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 79B8928DDC for ; Tue, 6 Mar 2018 03:28:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=CVAhkzDzOh9qUTFXdXz5rJl3Cz1zA6SDvv/fezZSrFs=; b=LVGmg6FDGGmEjuMuSxSw/YZ7DY r+IW+48uQx5ysKv+BzQr5OspKfVKyitKCFFoF0ERuHhELQOAaGv8631MEChlbaeh3TyljCic1kqV5 P6Ieou2ildjraYFoAD/BanDwuNQU66Y5JQcFq4vQonrkkYVsD6pQaSpFekQS/C9J8XrKwaTjSVqFs n/KrHqoLM+RG8Zb1s39+dS+/uai/u5FQvBnbmShpyCWMhD8HqiQXNHRvo9Q/NK9RDvxVD9xVSAC/6 TzaFgaK9rh/Dpcqfq5voiq/86qgtCV5mKiObImHUfs5CD47AsSV8Qd1UfkWTXYJj9qPczSRPGAJYR xikYXu6g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1et3HC-0004TH-KB; Tue, 06 Mar 2018 03:28:30 +0000 Received: from regular1.263xmail.com ([211.150.99.135]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1et3H6-0004Rc-G0; Tue, 06 Mar 2018 03:28:26 +0000 Received: from jeffy.chen?rock-chips.com (unknown [192.168.167.8]) by regular1.263xmail.com (Postfix) with ESMTP id D4E881DED4; Tue, 6 Mar 2018 11:28:11 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTPA id B2442308; Tue, 6 Mar 2018 11:28:04 +0800 (CST) X-RL-SENDER: jeffy.chen@rock-chips.com X-FST-TO: linux-kernel@vger.kernel.org X-SENDER-IP: 103.29.142.67 X-LOGIN-NAME: jeffy.chen@rock-chips.com X-UNIQUE-TAG: <3df2ad1c0b1176b4fb4243cc291eb301> X-ATTACHMENT-NUM: 0 X-SENDER: cjf@rock-chips.com X-DNS-TYPE: 0 Received: from localhost (unknown [103.29.142.67]) by smtp.263.net (Postfix) whith ESMTP id 9444D8GTH6; Tue, 06 Mar 2018 11:28:11 +0800 (CST) From: Jeffy Chen To: linux-kernel@vger.kernel.org Subject: [PATCH v7 10/14] iommu/rockchip: Use IOMMU device for dma mapping operations Date: Tue, 6 Mar 2018 11:27:55 +0800 Message-Id: <20180306032759.29069-1-jeffy.chen@rock-chips.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180306030252.3197-1-jeffy.chen@rock-chips.com> References: <20180306030252.3197-1-jeffy.chen@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180305_192824_882870_DACA4156 X-CRM114-Status: GOOD ( 16.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xxm@rock-chips.com, Joerg Roedel , Jeffy Chen , tfiga@chromium.org, jcliang@chromium.org, linux-rockchip@lists.infradead.org, iommu@lists.linux-foundation.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, Heiko Stuebner MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Use the first registered IOMMU device for dma mapping operations, and drop the domain platform device. This is similar to exynos iommu driver. Signed-off-by: Jeffy Chen Reviewed-by: Tomasz Figa Reviewed-by: Robin Murphy --- Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None drivers/iommu/rockchip-iommu.c | 85 ++++++++++++------------------------------ 1 file changed, 24 insertions(+), 61 deletions(-) diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 6c6275589bd5..6789e11b7087 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -79,7 +79,6 @@ struct rk_iommu_domain { struct list_head iommus; - struct platform_device *pdev; u32 *dt; /* page directory table */ dma_addr_t dt_dma; spinlock_t iommus_lock; /* lock for iommus list */ @@ -105,12 +104,14 @@ struct rk_iommu { struct iommu_domain *domain; /* domain to which iommu is attached */ }; +static struct device *dma_dev; + static inline void rk_table_flush(struct rk_iommu_domain *dom, dma_addr_t dma, unsigned int count) { size_t size = count * sizeof(u32); /* count of u32 entry */ - dma_sync_single_for_device(&dom->pdev->dev, dma, size, DMA_TO_DEVICE); + dma_sync_single_for_device(dma_dev, dma, size, DMA_TO_DEVICE); } static struct rk_iommu_domain *to_rk_domain(struct iommu_domain *dom) @@ -625,7 +626,6 @@ static void rk_iommu_zap_iova_first_last(struct rk_iommu_domain *rk_domain, static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain, dma_addr_t iova) { - struct device *dev = &rk_domain->pdev->dev; u32 *page_table, *dte_addr; u32 dte_index, dte; phys_addr_t pt_phys; @@ -643,9 +643,9 @@ static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain, if (!page_table) return ERR_PTR(-ENOMEM); - pt_dma = dma_map_single(dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE); - if (dma_mapping_error(dev, pt_dma)) { - dev_err(dev, "DMA mapping error while allocating page table\n"); + pt_dma = dma_map_single(dma_dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE); + if (dma_mapping_error(dma_dev, pt_dma)) { + dev_err(dma_dev, "DMA mapping error while allocating page table\n"); free_page((unsigned long)page_table); return ERR_PTR(-ENOMEM); } @@ -911,29 +911,20 @@ static void rk_iommu_detach_device(struct iommu_domain *domain, static struct iommu_domain *rk_iommu_domain_alloc(unsigned type) { struct rk_iommu_domain *rk_domain; - struct platform_device *pdev; - struct device *iommu_dev; if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; - /* Register a pdev per domain, so DMA API can base on this *dev - * even some virtual master doesn't have an iommu slave - */ - pdev = platform_device_register_simple("rk_iommu_domain", - PLATFORM_DEVID_AUTO, NULL, 0); - if (IS_ERR(pdev)) + if (!dma_dev) return NULL; - rk_domain = devm_kzalloc(&pdev->dev, sizeof(*rk_domain), GFP_KERNEL); + rk_domain = devm_kzalloc(dma_dev, sizeof(*rk_domain), GFP_KERNEL); if (!rk_domain) - goto err_unreg_pdev; - - rk_domain->pdev = pdev; + return NULL; if (type == IOMMU_DOMAIN_DMA && iommu_get_dma_cookie(&rk_domain->domain)) - goto err_unreg_pdev; + return NULL; /* * rk32xx iommus use a 2 level pagetable. @@ -944,11 +935,10 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type) if (!rk_domain->dt) goto err_put_cookie; - iommu_dev = &pdev->dev; - rk_domain->dt_dma = dma_map_single(iommu_dev, rk_domain->dt, + rk_domain->dt_dma = dma_map_single(dma_dev, rk_domain->dt, SPAGE_SIZE, DMA_TO_DEVICE); - if (dma_mapping_error(iommu_dev, rk_domain->dt_dma)) { - dev_err(iommu_dev, "DMA map error for DT\n"); + if (dma_mapping_error(dma_dev, rk_domain->dt_dma)) { + dev_err(dma_dev, "DMA map error for DT\n"); goto err_free_dt; } @@ -969,8 +959,6 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type) err_put_cookie: if (type == IOMMU_DOMAIN_DMA) iommu_put_dma_cookie(&rk_domain->domain); -err_unreg_pdev: - platform_device_unregister(pdev); return NULL; } @@ -987,20 +975,18 @@ static void rk_iommu_domain_free(struct iommu_domain *domain) if (rk_dte_is_pt_valid(dte)) { phys_addr_t pt_phys = rk_dte_pt_address(dte); u32 *page_table = phys_to_virt(pt_phys); - dma_unmap_single(&rk_domain->pdev->dev, pt_phys, + dma_unmap_single(dma_dev, pt_phys, SPAGE_SIZE, DMA_TO_DEVICE); free_page((unsigned long)page_table); } } - dma_unmap_single(&rk_domain->pdev->dev, rk_domain->dt_dma, + dma_unmap_single(dma_dev, rk_domain->dt_dma, SPAGE_SIZE, DMA_TO_DEVICE); free_page((unsigned long)rk_domain->dt); if (domain->type == IOMMU_DOMAIN_DMA) iommu_put_dma_cookie(&rk_domain->domain); - - platform_device_unregister(rk_domain->pdev); } static bool rk_iommu_is_dev_iommu_master(struct device *dev) @@ -1123,30 +1109,6 @@ static const struct iommu_ops rk_iommu_ops = { .pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP, }; -static int rk_iommu_domain_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - - dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), GFP_KERNEL); - if (!dev->dma_parms) - return -ENOMEM; - - /* Set dma_ops for dev, otherwise it would be dummy_dma_ops */ - arch_setup_dma_ops(dev, 0, DMA_BIT_MASK(32), NULL, false); - - dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); - dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); - - return 0; -} - -static struct platform_driver rk_iommu_domain_driver = { - .probe = rk_iommu_domain_probe, - .driver = { - .name = "rk_iommu_domain", - }, -}; - static int rk_iommu_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1220,6 +1182,14 @@ static int rk_iommu_probe(struct platform_device *pdev) if (err) goto err_remove_sysfs; + /* + * Use the first registered IOMMU device for domain to use with DMA + * API, since a domain might not physically correspond to a single + * IOMMU device.. + */ + if (!dma_dev) + dma_dev = &pdev->dev; + return 0; err_remove_sysfs: iommu_device_sysfs_remove(&iommu->iommu); @@ -1258,14 +1228,7 @@ static int __init rk_iommu_init(void) if (ret) return ret; - ret = platform_driver_register(&rk_iommu_domain_driver); - if (ret) - return ret; - - ret = platform_driver_register(&rk_iommu_driver); - if (ret) - platform_driver_unregister(&rk_iommu_domain_driver); - return ret; + return platform_driver_register(&rk_iommu_driver); } subsys_initcall(rk_iommu_init);