diff options
Diffstat (limited to 'drivers/iommu/mtk_iommu_v1.c')
| -rw-r--r-- | drivers/iommu/mtk_iommu_v1.c | 47 |
1 files changed, 21 insertions, 26 deletions
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index 0e780848f59b..6ede4286b835 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -1,4 +1,6 @@ /* + * IOMMU API for MTK architected m4u v1 implementations + * * Copyright (c) 2015-2016 MediaTek Inc. * Author: Honghui Zhang <honghui.zhang@mediatek.com> * @@ -35,7 +37,7 @@ #include <linux/spinlock.h> #include <asm/barrier.h> #include <asm/dma-iommu.h> -#include <linux/module.h> +#include <linux/init.h> #include <dt-bindings/memory/mt2701-larb-port.h> #include <soc/mediatek/smi.h> #include "mtk_iommu.h" @@ -206,7 +208,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data, { struct mtk_smi_larb_iommu *larb_mmu; unsigned int larbid, portid; - struct iommu_fwspec *fwspec = dev->iommu_fwspec; + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); int i; for (i = 0; i < fwspec->num_ids; ++i) { @@ -271,7 +273,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); - struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; + struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv; int ret; if (!data) @@ -293,7 +295,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, static void mtk_iommu_detach_device(struct iommu_domain *domain, struct device *dev) { - struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; + struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv; if (!data) return; @@ -362,7 +364,7 @@ static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain, return pa; } -static struct iommu_ops mtk_iommu_ops; +static const struct iommu_ops mtk_iommu_ops; /* * MTK generation one iommu HW only support one iommu domain, and all the client @@ -371,6 +373,7 @@ static struct iommu_ops mtk_iommu_ops; static int mtk_iommu_create_mapping(struct device *dev, struct of_phandle_args *args) { + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct mtk_iommu_data *data; struct platform_device *m4updev; struct dma_iommu_mapping *mtk_mapping; @@ -383,28 +386,29 @@ static int mtk_iommu_create_mapping(struct device *dev, return -EINVAL; } - if (!dev->iommu_fwspec) { + if (!fwspec) { ret = iommu_fwspec_init(dev, &args->np->fwnode, &mtk_iommu_ops); if (ret) return ret; - } else if (dev->iommu_fwspec->ops != &mtk_iommu_ops) { + fwspec = dev_iommu_fwspec_get(dev); + } else if (dev_iommu_fwspec_get(dev)->ops != &mtk_iommu_ops) { return -EINVAL; } - if (!dev->iommu_fwspec->iommu_priv) { + if (!fwspec->iommu_priv) { /* Get the m4u device */ m4updev = of_find_device_by_node(args->np); if (WARN_ON(!m4updev)) return -EINVAL; - dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev); + fwspec->iommu_priv = platform_get_drvdata(m4updev); } ret = iommu_fwspec_add_ids(dev, args->args, 1); if (ret) return ret; - data = dev->iommu_fwspec->iommu_priv; + data = fwspec->iommu_priv; m4udev = data->dev; mtk_mapping = m4udev->archdata.iommu; if (!mtk_mapping) { @@ -422,6 +426,7 @@ static int mtk_iommu_create_mapping(struct device *dev, static int mtk_iommu_add_device(struct device *dev) { + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct dma_iommu_mapping *mtk_mapping; struct of_phandle_args iommu_spec; struct of_phandle_iterator it; @@ -440,7 +445,7 @@ static int mtk_iommu_add_device(struct device *dev) of_node_put(iommu_spec.np); } - if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) + if (!fwspec || fwspec->ops != &mtk_iommu_ops) return -ENODEV; /* Not a iommu client device */ /* @@ -458,7 +463,7 @@ static int mtk_iommu_add_device(struct device *dev) if (err) return err; - data = dev->iommu_fwspec->iommu_priv; + data = fwspec->iommu_priv; mtk_mapping = data->dev->archdata.iommu; err = arm_iommu_attach_device(dev, mtk_mapping); if (err) { @@ -471,12 +476,13 @@ static int mtk_iommu_add_device(struct device *dev) static void mtk_iommu_remove_device(struct device *dev) { + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct mtk_iommu_data *data; - if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) + if (!fwspec || fwspec->ops != &mtk_iommu_ops) return; - data = dev->iommu_fwspec->iommu_priv; + data = fwspec->iommu_priv; iommu_device_unlink(&data->iommu, dev); iommu_group_remove_device(dev); @@ -524,7 +530,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) return 0; } -static struct iommu_ops mtk_iommu_ops = { +static const struct iommu_ops mtk_iommu_ops = { .domain_alloc = mtk_iommu_domain_alloc, .domain_free = mtk_iommu_domain_free, .attach_dev = mtk_iommu_attach_device, @@ -704,15 +710,4 @@ static int __init m4u_init(void) { return platform_driver_register(&mtk_iommu_driver); } - -static void __exit m4u_exit(void) -{ - return platform_driver_unregister(&mtk_iommu_driver); -} - subsys_initcall(m4u_init); -module_exit(m4u_exit); - -MODULE_DESCRIPTION("IOMMU API for MTK architected m4u v1 implementations"); -MODULE_AUTHOR("Honghui Zhang <honghui.zhang@mediatek.com>"); -MODULE_LICENSE("GPL v2"); |