From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.szyprowski@samsung.com (Marek Szyprowski) Date: Wed, 19 Nov 2014 12:15:48 +0100 Subject: [PATCH v3 19/19] iommu: exynos: add callback for initializing devices from device tree In-Reply-To: <1416395748-10731-1-git-send-email-m.szyprowski@samsung.com> References: <1416395748-10731-1-git-send-email-m.szyprowski@samsung.com> Message-ID: <1416395748-10731-20-git-send-email-m.szyprowski@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch adds implementation of of_xlate callback, which prepares masters device for attaching to IOMMU. This callback is called during creating devices from device tree. Signed-off-by: Marek Szyprowski --- drivers/iommu/exynos-iommu.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 88f9afe641a0..213db88ca52c 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1078,6 +1078,33 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *iommu_domain, return phys; } +static int exynos_iommu_of_xlate(struct device *dev, + struct of_phandle_args *spec) +{ + struct exynos_iommu_owner *owner = dev->archdata.iommu; + struct platform_device *sysmmu = of_find_device_by_node(spec->np); + struct sysmmu_drvdata *data; + + if (!sysmmu) + return -ENODEV; + + data = platform_get_drvdata(sysmmu); + if (!data) + return -ENODEV; + + if (!owner) { + owner = kzalloc(sizeof(*owner), GFP_KERNEL); + if (!owner) + return -ENOMEM; + + INIT_LIST_HEAD(&owner->clients); + dev->archdata.iommu = owner; + } + + list_add_tail(&data->owner_node, &owner->clients); + return 0; +} + static const struct iommu_ops exynos_iommu_ops = { .domain_init = exynos_iommu_domain_init, .domain_destroy = exynos_iommu_domain_destroy, @@ -1087,6 +1114,7 @@ static const struct iommu_ops exynos_iommu_ops = { .unmap = exynos_iommu_unmap, .iova_to_phys = exynos_iommu_iova_to_phys, .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE, + .of_xlate = exynos_iommu_of_xlate, }; static int init_done; -- 1.9.2