From patchwork Sun Apr 27 07:37:40 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shaik Ameer Basha X-Patchwork-Id: 4071071 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 72E1E9F319 for ; Sun, 27 Apr 2014 07:48:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 492A22024D for ; Sun, 27 Apr 2014 07:48:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F08A22025A for ; Sun, 27 Apr 2014 07:48:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753219AbaD0HkP (ORCPT ); Sun, 27 Apr 2014 03:40:15 -0400 Received: from mailout2.samsung.com ([203.254.224.25]:31128 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753232AbaD0HjL (ORCPT ); Sun, 27 Apr 2014 03:39:11 -0400 Received: from epcpsbgr3.samsung.com (u143.gpu120.samsung.co.kr [203.254.230.143]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N4O00IV2ILATR30@mailout2.samsung.com>; Sun, 27 Apr 2014 16:39:10 +0900 (KST) Received: from epcpsbgm2.samsung.com ( [172.20.52.122]) by epcpsbgr3.samsung.com (EPCPMTA) with SMTP id B7.84.11120.D14BC535; Sun, 27 Apr 2014 16:39:10 +0900 (KST) X-AuditID: cbfee68f-b7eff6d000002b70-2e-535cb41d4795 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id CA.9E.25708.D14BC535; Sun, 27 Apr 2014 16:39:09 +0900 (KST) Received: from chromebld-server.sisodomain.com ([107.108.73.106]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N4O00I35IKD7Q00@mmp1.samsung.com>; Sun, 27 Apr 2014 16:39:09 +0900 (KST) From: Shaik Ameer Basha To: linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Cc: kgene.kim@samsung.com, tomasz.figa@gmail.com, pullip.cho@samsung.com, a.motakis@virtualopensystems.com, grundler@chromium.org, joro@8bytes.org, prathyush.k@samsung.com, rahul.sharma@samsung.com, sachin.kamat@linaro.org, supash.ramaswamy@linaro.org, Varun.Sethi@freescale.com, s.nawrocki@samsung.com, t.figa@samsung.com, joshi@samsung.com Subject: [PATCH v12 08/31] iommu/exynos: handle one instance of sysmmu with a device descriptor Date: Sun, 27 Apr 2014 13:07:40 +0530 Message-id: <1398584283-22846-9-git-send-email-shaik.ameer@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1398584283-22846-1-git-send-email-shaik.ameer@samsung.com> References: <1398584283-22846-1-git-send-email-shaik.ameer@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrJIsWRmVeSWpSXmKPExsWyRsSkSlduS0ywwbO1LBZ37p5jtZh/BEi8 OvKDyWLBfmuLztkb2C2+7/rCbtG74CqbxabH11gtLu+aw2Yx4/w+JosLKzayW/zrPchoMWXR YVaLw2/aWS1O/ulltGi53stksX7GaxaLVbv+MFrMvLWGxUHY48nBeUwesxsusnj8O9zP5LFz 1l12jzvX9rB5bF5S7zH5xnJGj74tqxg9Pm+S87hy9AxTAFcUl01Kak5mWWqRvl0CV8b3t1eY C+4GV0z+dYGxgXGBUxcjJ4eEgInEvytXmSFsMYkL99azdTFycQgJLGWUmNL2jR2maNWKqSwQ iUWMErOWdjCCJIQEJjBJXLhlBGKzCRhKbL93hRWkSERgNaNE38Uz7CAOs8BdJok5q96BdQgL JEo0flzGCmKzCKhKXJl9FmgsBwevgLvE4yUJIKaEgILEnEk2IBWcAh4ST+7sYYHY5S7x9tQX sPkSAnM5JA5O/8gOMUZA4tvkQywQvbISmw5AfSMpcXDFDZYJjMILGBlWMYqmFiQXFCelFxnr FSfmFpfmpesl5+duYgRG4+l/z/p3MN49YH2IMRlo3ERmKdHkfGA055XEGxqbGVmYmpgaG5lb mpEmrCTOe/9hUpCQQHpiSWp2ampBalF8UWlOavEhRiYOTqkGxviXE2UO6Jje4eBQqopUdpx9 JUX8886LNx5MKl8nf3nl5/wrtT2WbEwRFplyBr7ZH87bNHRNSmf+ku0X2pSYn5r+Y7L1utwZ a5ZMmfrMeFrh2jRvKc0zs/0+/3eY9EbsqfBrTou/3tNEubuz+GvETp7tuBnkMSkwOy/gZvff 2iaGqMf/pHNqlViKMxINtZiLihMB/vrR6twCAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrGKsWRmVeSWpSXmKPExsVy+t9jAV3ZLTHBBvMPG1vcuXuO1WL+ESDx 6sgPJosF+60tOmdvYLf4vusLu0XvgqtsFpseX2O1uLxrDpvFjPP7mCwurNjIbvGv9yCjxZRF h1ktDr9pZ7U4+aeX0aLlei+TxfoZr1ksVu36w2gx89YaFgdhjycH5zF5zG64yOLx73A/k8fO WXfZPe5c28PmsXlJvcfkG8sZPfq2rGL0+LxJzuPK0TNMAVxRDYw2GamJKalFCql5yfkpmXnp tkrewfHO8aZmBoa6hpYW5koKeYm5qbZKLj4Bum6ZOUCvKSmUJeaUAoUCEouLlfTtME0IDXHT tYBpjND1DQmC6zEyQAMJaxgzvr+9wlxwN7hi8q8LjA2MC5y6GDk5JARMJFatmMoCYYtJXLi3 nq2LkYtDSGARo8SspR2MIAkhgQlMEhduGYHYbAKGEtvvXWEFKRIRWM0o0XfxDDuIwyxwl0li zqp3YB3CAokSjR+XsYLYLAKqEldmnwVawcHBK+Au8XhJAogpIaAgMWeSDUgFp4CHxJM7e1gg drlLvD31hXUCI+8CRoZVjKKpBckFxUnpuUZ6xYm5xaV56XrJ+bmbGMGx/kx6B+OqBotDjAIc jEo8vD+kY4KFWBPLiitzDzFKcDArifByTgcK8aYkVlalFuXHF5XmpBYfYkwGumkis5Rocj4w DeWVxBsam5ibGptamliYmFmSJqwkznuw1TpQSCA9sSQ1OzW1ILUIZgsTB6dUA+Pijtvl7Cd/ hk9U8P2kGtNZ4brosn9QvUVtwpnb9S9uW5nwq/rftFxwQcNV+nb0KT+rLZo95f/Yr5pEX358 3Pnp4k+edcZpiwUMKh+myx43/HK6NedSgtVdW6N7h+Om9h39/YWJ5fMmzv8nFjw5r3/Q4t7n 3KetM/crXFlatmbaxkvfw26U/76oxFKckWioxVxUnAgAAfsUPTkDAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Cho KyongHo System MMU driver is changed to control only a single instance of System MMU at a time. Since a single instance of System MMU has only a single clock descriptor for its clock gating, single address range for control registers, there is no need to obtain two or more clock descriptors and ioremaped region. Signed-off-by: Cho KyongHo --- drivers/iommu/exynos-iommu.c | 223 ++++++++++++++---------------------------- 1 file changed, 71 insertions(+), 152 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index d466076..a15216f 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -170,9 +170,8 @@ struct sysmmu_drvdata { struct device *sysmmu; /* System MMU's device descriptor */ struct device *dev; /* Owner of system MMU */ char *dbgname; - int nsfrs; - void __iomem **sfrbases; - struct clk *clk[2]; + void __iomem *sfrbase; + struct clk *clk; int activations; rwlock_t lock; struct iommu_domain *domain; @@ -293,56 +292,39 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) { /* SYSMMU is in blocked when interrupt occurred. */ struct sysmmu_drvdata *data = dev_id; - struct resource *irqres; - struct platform_device *pdev; enum exynos_sysmmu_inttype itype; unsigned long addr = -1; - - int i, ret = -ENOSYS; + int ret = -ENOSYS; read_lock(&data->lock); WARN_ON(!is_sysmmu_active(data)); - pdev = to_platform_device(data->sysmmu); - for (i = 0; i < (pdev->num_resources / 2); i++) { - irqres = platform_get_resource(pdev, IORESOURCE_IRQ, i); - if (irqres && ((int)irqres->start == irq)) - break; - } - - if (i == pdev->num_resources) { + itype = (enum exynos_sysmmu_inttype) + __ffs(__raw_readl(data->sfrbase + REG_INT_STATUS)); + if (WARN_ON(!((itype >= 0) && (itype < SYSMMU_FAULT_UNKNOWN)))) itype = SYSMMU_FAULT_UNKNOWN; - } else { - itype = (enum exynos_sysmmu_inttype) - __ffs(__raw_readl(data->sfrbases[i] + REG_INT_STATUS)); - if (WARN_ON(!((itype >= 0) && (itype < SYSMMU_FAULT_UNKNOWN)))) - itype = SYSMMU_FAULT_UNKNOWN; - else - addr = __raw_readl( - data->sfrbases[i] + fault_reg_offset[itype]); - } + else + addr = __raw_readl(data->sfrbase + fault_reg_offset[itype]); if (data->domain) - ret = report_iommu_fault(data->domain, data->dev, - addr, itype); + ret = report_iommu_fault(data->domain, data->dev, addr, itype); if ((ret == -ENOSYS) && data->fault_handler) { unsigned long base = data->pgtable; if (itype != SYSMMU_FAULT_UNKNOWN) - base = __raw_readl( - data->sfrbases[i] + REG_PT_BASE_ADDR); + base = __raw_readl(data->sfrbase + REG_PT_BASE_ADDR); ret = data->fault_handler(itype, base, addr); } if (!ret && (itype != SYSMMU_FAULT_UNKNOWN)) - __raw_writel(1 << itype, data->sfrbases[i] + REG_INT_CLEAR); + __raw_writel(1 << itype, data->sfrbase + REG_INT_CLEAR); else dev_dbg(data->sysmmu, "(%s) %s is not handled.\n", data->dbgname, sysmmu_fault_name[itype]); if (itype != SYSMMU_FAULT_UNKNOWN) - sysmmu_unblock(data->sfrbases[i]); + sysmmu_unblock(data->sfrbase); read_unlock(&data->lock); @@ -353,20 +335,16 @@ static bool __exynos_sysmmu_disable(struct sysmmu_drvdata *data) { unsigned long flags; bool disabled = false; - int i; write_lock_irqsave(&data->lock, flags); if (!set_sysmmu_inactive(data)) goto finish; - for (i = 0; i < data->nsfrs; i++) - __raw_writel(CTRL_DISABLE, data->sfrbases[i] + REG_MMU_CTRL); + __raw_writel(CTRL_DISABLE, data->sfrbase + REG_MMU_CTRL); - if (data->clk[1]) - clk_disable(data->clk[1]); - if (data->clk[0]) - clk_disable(data->clk[0]); + if (!IS_ERR(data->clk)) + clk_disable(data->clk); disabled = true; data->pgtable = 0; @@ -392,7 +370,7 @@ finish: static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data, unsigned long pgtable, struct iommu_domain *domain) { - int i, ret = 0; + int ret = 0; unsigned long flags; write_lock_irqsave(&data->lock, flags); @@ -409,17 +387,14 @@ static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data, goto finish; } - if (data->clk[0]) - clk_enable(data->clk[0]); - if (data->clk[1]) - clk_enable(data->clk[1]); + if (!IS_ERR(data->clk)) + clk_enable(data->clk); data->pgtable = pgtable; - for (i = 0; i < data->nsfrs; i++) { - __sysmmu_set_ptbase(data->sfrbases[i], pgtable); - __raw_writel(CTRL_ENABLE, data->sfrbases[i] + REG_MMU_CTRL); - } + __sysmmu_set_ptbase(data->sfrbase, pgtable); + + __raw_writel(CTRL_ENABLE, data->sfrbase + REG_MMU_CTRL); data->domain = domain; @@ -476,28 +451,26 @@ static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova, read_lock_irqsave(&data->lock, flags); if (is_sysmmu_active(data)) { - int i; - for (i = 0; i < data->nsfrs; i++) { - unsigned int maj; - unsigned int num_inv = 1; - maj = __raw_readl(data->sfrbases[i] + REG_MMU_VERSION); - /* - * L2TLB invalidation required - * 4KB page: 1 invalidation - * 64KB page: 16 invalidation - * 1MB page: 64 invalidation - * because it is set-associative TLB - * with 8-way and 64 sets. - * 1MB page can be cached in one of all sets. - * 64KB page can be one of 16 consecutive sets. - */ - if ((maj >> 28) == 2) /* major version number */ - num_inv = min_t(unsigned int, size / PAGE_SIZE, 64); - if (sysmmu_block(data->sfrbases[i])) { - __sysmmu_tlb_invalidate_entry( - data->sfrbases[i], iova, num_inv); - sysmmu_unblock(data->sfrbases[i]); - } + unsigned int maj; + unsigned int num_inv = 1; + maj = __raw_readl(data->sfrbase + REG_MMU_VERSION); + /* + * L2TLB invalidation required + * 4KB page: 1 invalidation + * 64KB page: 16 invalidation + * 1MB page: 64 invalidation + * because it is set-associative TLB + * with 8-way and 64 sets. + * 1MB page can be cached in one of all sets. + * 64KB page can be one of 16 consecutive sets. + */ + if ((maj >> 28) == 2) /* major version number */ + num_inv = min_t(unsigned int, size / PAGE_SIZE, 64); + + if (sysmmu_block(data->sfrbase)) { + __sysmmu_tlb_invalidate_entry(data->sfrbase, iova, + num_inv); + sysmmu_unblock(data->sfrbase); } } else { dev_dbg(data->sysmmu, @@ -516,12 +489,9 @@ void exynos_sysmmu_tlb_invalidate(struct device *dev) read_lock_irqsave(&data->lock, flags); if (is_sysmmu_active(data)) { - int i; - for (i = 0; i < data->nsfrs; i++) { - if (sysmmu_block(data->sfrbases[i])) { - __sysmmu_tlb_invalidate(data->sfrbases[i]); - sysmmu_unblock(data->sfrbases[i]); - } + if (sysmmu_block(data->sfrbase)) { + __sysmmu_tlb_invalidate(data->sfrbase); + sysmmu_unblock(data->sfrbase); } } else { dev_dbg(data->sysmmu, @@ -534,11 +504,10 @@ void exynos_sysmmu_tlb_invalidate(struct device *dev) static int exynos_sysmmu_probe(struct platform_device *pdev) { - int i, ret; - struct device *dev; + int ret; + struct device *dev = &pdev->dev; struct sysmmu_drvdata *data; - - dev = &pdev->dev; + struct resource *res; data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) { @@ -547,82 +516,37 @@ static int exynos_sysmmu_probe(struct platform_device *pdev) goto err_alloc; } - ret = dev_set_drvdata(dev, data); - if (ret) { - dev_dbg(dev, "Unabled to initialize driver data\n"); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_dbg(dev, "Unable to find IOMEM region\n"); + ret = -ENOENT; goto err_init; } - data->nsfrs = pdev->num_resources / 2; - data->sfrbases = kmalloc(sizeof(*data->sfrbases) * data->nsfrs, - GFP_KERNEL); - if (data->sfrbases == NULL) { - dev_dbg(dev, "Not enough memory\n"); - ret = -ENOMEM; - goto err_init; + data->sfrbase = ioremap(res->start, resource_size(res)); + if (!data->sfrbase) { + dev_dbg(dev, "Unable to map IOMEM @ PA:%#x\n", res->start); + ret = -ENOENT; + goto err_res; } - for (i = 0; i < data->nsfrs; i++) { - struct resource *res; - res = platform_get_resource(pdev, IORESOURCE_MEM, i); - if (!res) { - dev_dbg(dev, "Unable to find IOMEM region\n"); - ret = -ENOENT; - goto err_res; - } - - data->sfrbases[i] = ioremap(res->start, resource_size(res)); - if (!data->sfrbases[i]) { - dev_dbg(dev, "Unable to map IOMEM @ PA:%#x\n", - res->start); - ret = -ENOENT; - goto err_res; - } + ret = platform_get_irq(pdev, 0); + if (ret <= 0) { + dev_dbg(dev, "Unable to find IRQ resource\n"); + goto err_irq; } - for (i = 0; i < data->nsfrs; i++) { - ret = platform_get_irq(pdev, i); - if (ret <= 0) { - dev_dbg(dev, "Unable to find IRQ resource\n"); - goto err_irq; - } - - ret = request_irq(ret, exynos_sysmmu_irq, 0, - dev_name(dev), data); - if (ret) { - dev_dbg(dev, "Unabled to register interrupt handler\n"); - goto err_irq; - } + ret = request_irq(ret, exynos_sysmmu_irq, 0, + dev_name(dev), data); + if (ret) { + dev_dbg(dev, "Unabled to register interrupt handler\n"); + goto err_irq; } if (dev_get_platdata(dev)) { - char *deli, *beg; - struct sysmmu_platform_data *platdata = dev_get_platdata(dev); - - beg = platdata->clockname; - - for (deli = beg; (*deli != '\0') && (*deli != ','); deli++) - /* NOTHING */; - - if (*deli == '\0') - deli = NULL; - else - *deli = '\0'; - - data->clk[0] = clk_get(dev, beg); - if (IS_ERR(data->clk[0])) { - data->clk[0] = NULL; + data->clk = clk_get(dev, "sysmmu"); + if (IS_ERR(data->clk)) dev_dbg(dev, "No clock descriptor registered\n"); - } - - if (data->clk[0] && deli) { - *deli = ','; - data->clk[1] = clk_get(dev, deli + 1); - if (IS_ERR(data->clk[1])) - data->clk[1] = NULL; - } - - data->dbgname = platdata->dbgname; } data->sysmmu = dev; @@ -631,21 +555,16 @@ static int exynos_sysmmu_probe(struct platform_device *pdev) __set_fault_handler(data, &default_fault_handler); + platform_set_drvdata(pdev, data); + pm_runtime_enable(dev); dev_dbg(dev, "(%s) Initialized\n", data->dbgname); return 0; err_irq: - while (i-- > 0) { - int irq; - - irq = platform_get_irq(pdev, i); - free_irq(irq, data); - } + free_irq(platform_get_irq(pdev, 0), data); err_res: - while (data->nsfrs-- > 0) - iounmap(data->sfrbases[data->nsfrs]); - kfree(data->sfrbases); + iounmap(data->sfrbase); err_init: kfree(data); err_alloc: