From patchwork Thu Feb 5 21:52:54 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 5787351 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 088339F336 for ; Thu, 5 Feb 2015 21:56:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E846920279 for ; Thu, 5 Feb 2015 21:56:43 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CFE4A201FA for ; Thu, 5 Feb 2015 21:56:42 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YJUNe-0006HZ-UG; Thu, 05 Feb 2015 21:54:34 +0000 Received: from devils.ext.ti.com ([198.47.26.153]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YJUN0-0005lu-7B for linux-arm-kernel@lists.infradead.org; Thu, 05 Feb 2015 21:53:56 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id t15Lr3tu018100; Thu, 5 Feb 2015 15:53:03 -0600 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id t15Lr1ik026502; Thu, 5 Feb 2015 15:53:02 -0600 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.224.2; Thu, 5 Feb 2015 15:53:01 -0600 Received: from ula0868495.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id t15LqxnK008339; Thu, 5 Feb 2015 15:53:01 -0600 From: Murali Karicheri To: , , , , Subject: [PATCH v6 2/7] of: move of_dma_configure() to device.c to help re-use Date: Thu, 5 Feb 2015 16:52:54 -0500 Message-ID: <1423173179-10227-3-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1423173179-10227-1-git-send-email-m-karicheri2@ti.com> References: <1423173179-10227-1-git-send-email-m-karicheri2@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150205_135354_394150_07C7703A X-CRM114-Status: GOOD ( 18.93 ) X-Spam-Score: -5.0 (-----) Cc: Russell King , Arnd Bergmann , Joerg Roedel , Will Deacon , Rob Herring , Murali Karicheri , Suravee Suthikulpanit , Grant Likely X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 Move of_dma_configure() to device.c so that same function can be re-used for PCI devices to obtain DMA configuration from DT. Also add a second argument so that for PCI, DT node of root bus host bridge can be used to obtain the DMA configuration for the slave PCI device. Cc: Joerg Roedel Cc: Grant Likely Cc: Rob Herring Cc: Will Deacon Cc: Russell King Cc: Arnd Bergmann Cc: Suravee Suthikulpanit Acked-by: Bjorn Helgaas Signed-off-by: Murali Karicheri --- drivers/of/device.c | 59 +++++++++++++++++++++++++++++++++++++++++++++ drivers/of/platform.c | 58 ++------------------------------------------ include/linux/of_device.h | 2 ++ 3 files changed, 63 insertions(+), 56 deletions(-) diff --git a/drivers/of/device.c b/drivers/of/device.c index 46d6c75c..2de320d 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -2,6 +2,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -66,6 +69,62 @@ int of_device_add(struct platform_device *ofdev) return device_add(&ofdev->dev); } +/** + * of_dma_configure - Setup DMA configuration + * @dev: Device to apply DMA configuration + * @np: ptr to of node having dma configuration + * + * Try to get devices's DMA configuration from DT and update it + * accordingly. + * + * In case if platform code need to use own special DMA configuration,it + * can use Platform bus notifier and handle BUS_NOTIFY_ADD_DEVICE event + * to fix up DMA configuration. + */ +void of_dma_configure(struct device *dev, struct device_node *np) +{ + u64 dma_addr, paddr, size; + int ret; + bool coherent; + unsigned long offset; + struct iommu_ops *iommu; + + /* + * Set default dma-mask to 32 bit. Drivers are expected to setup + * the correct supported dma_mask. + */ + dev->coherent_dma_mask = DMA_BIT_MASK(32); + + /* + * Set it to coherent_dma_mask by default if the architecture + * code has not set it. + */ + if (!dev->dma_mask) + dev->dma_mask = &dev->coherent_dma_mask; + + ret = of_dma_get_range(np, &dma_addr, &paddr, &size); + if (ret < 0) { + dma_addr = offset = 0; + size = dev->coherent_dma_mask; + } else { + offset = PFN_DOWN(paddr - dma_addr); + dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", offset); + } + + dev->dma_pfn_offset = offset; + + coherent = of_dma_is_coherent(np); + dev_dbg(dev, "device is%sdma coherent\n", + coherent ? " " : " not "); + + iommu = of_iommu_configure(dev, np); + dev_dbg(dev, "device is%sbehind an iommu\n", + iommu ? " " : " not "); + + arch_setup_dma_ops(dev, dma_addr, size, iommu, coherent); +} +EXPORT_SYMBOL_GPL(of_dma_configure); + int of_device_register(struct platform_device *pdev) { device_initialize(&pdev->dev); diff --git a/drivers/of/platform.c b/drivers/of/platform.c index d3f3988..cbee18d 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -19,7 +19,6 @@ #include #include #include -#include #include #include #include @@ -150,59 +149,6 @@ struct platform_device *of_device_alloc(struct device_node *np, } EXPORT_SYMBOL(of_device_alloc); -/** - * of_dma_configure - Setup DMA configuration - * @dev: Device to apply DMA configuration - * - * Try to get devices's DMA configuration from DT and update it - * accordingly. - * - * In case if platform code need to use own special DMA configuration,it - * can use Platform bus notifier and handle BUS_NOTIFY_ADD_DEVICE event - * to fix up DMA configuration. - */ -static void of_dma_configure(struct device *dev) -{ - u64 dma_addr, paddr, size; - int ret; - bool coherent; - unsigned long offset; - struct iommu_ops *iommu; - - /* - * Set default dma-mask to 32 bit. Drivers are expected to setup - * the correct supported dma_mask. - */ - dev->coherent_dma_mask = DMA_BIT_MASK(32); - - /* - * Set it to coherent_dma_mask by default if the architecture - * code has not set it. - */ - if (!dev->dma_mask) - dev->dma_mask = &dev->coherent_dma_mask; - - ret = of_dma_get_range(dev->of_node, &dma_addr, &paddr, &size); - if (ret < 0) { - dma_addr = offset = 0; - size = dev->coherent_dma_mask; - } else { - offset = PFN_DOWN(paddr - dma_addr); - dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", offset); - } - dev->dma_pfn_offset = offset; - - coherent = of_dma_is_coherent(dev->of_node); - dev_dbg(dev, "device is%sdma coherent\n", - coherent ? " " : " not "); - - iommu = of_iommu_configure(dev, dev->of_node); - dev_dbg(dev, "device is%sbehind an iommu\n", - iommu ? " " : " not "); - - arch_setup_dma_ops(dev, dma_addr, size, iommu, coherent); -} - static void of_dma_deconfigure(struct device *dev) { arch_teardown_dma_ops(dev); @@ -236,7 +182,7 @@ static struct platform_device *of_platform_device_create_pdata( dev->dev.bus = &platform_bus_type; dev->dev.platform_data = platform_data; - of_dma_configure(&dev->dev); + of_dma_configure(&dev->dev, dev->dev.of_node); if (of_device_add(dev) != 0) { of_dma_deconfigure(&dev->dev); @@ -299,7 +245,7 @@ static struct amba_device *of_amba_device_create(struct device_node *node, dev_set_name(&dev->dev, "%s", bus_id); else of_device_make_bus_id(&dev->dev); - of_dma_configure(&dev->dev); + of_dma_configure(&dev->dev, dev->dev.of_node); /* Allow the HW Peripheral ID to be overridden */ prop = of_get_property(node, "arm,primecell-periphid", NULL); diff --git a/include/linux/of_device.h b/include/linux/of_device.h index ef37021..c661496 100644 --- a/include/linux/of_device.h +++ b/include/linux/of_device.h @@ -53,6 +53,7 @@ static inline struct device_node *of_cpu_device_node_get(int cpu) return of_node_get(cpu_dev->of_node); } +void of_dma_configure(struct device *dev, struct device_node *np); #else /* CONFIG_OF */ static inline int of_driver_match_device(struct device *dev, @@ -90,6 +91,7 @@ static inline struct device_node *of_cpu_device_node_get(int cpu) { return NULL; } +void of_dma_configure(struct device *dev, struct device_node *np) { } #endif /* CONFIG_OF */ #endif /* _LINUX_OF_DEVICE_H */