[PATCH 1/9] iommu/of: Drop early initialisation hooks
From: m.szyprowski@samsung.com (Marek Szyprowski)
Date: 2018-01-11 09:40:58
Also in:
linux-arm-msm, linux-devicetree, linux-iommu, linux-samsung-soc, lkml
Hi Jeffy, On 2018-01-11 09:22, Jeffy Chen wrote:
With the probe-deferral mechanism, early initialisation hooks are no longer needed. Suggested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Jeffy Chen <redacted> --- drivers/iommu/arm-smmu-v3.c | 2 +- drivers/iommu/arm-smmu.c | 12 ++++++------ drivers/iommu/exynos-iommu.c | 2 +-
For Exynos IOMMU:
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
IPMMU and MSM IOMMU are no longer multi-platform safe after this patch.
It breaks them in the same way as my commit 928055a01b3f ("iommu/exynos:
Remove custom platform device registration code") broke Exynos IOMMU.
You need a similar fix for them:
https://www.spinics.net/lists/arm-kernel/msg627648.html
quoted hunk ↗ jump to hunk
drivers/iommu/ipmmu-vmsa.c | 17 ++--------------- drivers/iommu/msm_iommu.c | 24 +++++++----------------- drivers/iommu/of_iommu.c | 16 ---------------- drivers/iommu/qcom_iommu.c | 2 +- include/linux/of_iommu.h | 6 ++---- 8 files changed, 20 insertions(+), 61 deletions(-)diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 744592d330ca..3f2f1fc68b52 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c@@ -2971,7 +2971,7 @@ static struct platform_driver arm_smmu_driver = { }; module_platform_driver(arm_smmu_driver); -IOMMU_OF_DECLARE(arm_smmuv3, "arm,smmu-v3", NULL); +IOMMU_OF_DECLARE(arm_smmuv3, "arm,smmu-v3"); MODULE_DESCRIPTION("IOMMU API for ARM architected SMMUv3 implementations"); MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 78d4c6b8f1ba..69e7c60792a8 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c@@ -2211,12 +2211,12 @@ static struct platform_driver arm_smmu_driver = { }; module_platform_driver(arm_smmu_driver); -IOMMU_OF_DECLARE(arm_smmuv1, "arm,smmu-v1", NULL); -IOMMU_OF_DECLARE(arm_smmuv2, "arm,smmu-v2", NULL); -IOMMU_OF_DECLARE(arm_mmu400, "arm,mmu-400", NULL); -IOMMU_OF_DECLARE(arm_mmu401, "arm,mmu-401", NULL); -IOMMU_OF_DECLARE(arm_mmu500, "arm,mmu-500", NULL); -IOMMU_OF_DECLARE(cavium_smmuv2, "cavium,smmu-v2", NULL); +IOMMU_OF_DECLARE(arm_smmuv1, "arm,smmu-v1"); +IOMMU_OF_DECLARE(arm_smmuv2, "arm,smmu-v2"); +IOMMU_OF_DECLARE(arm_mmu400, "arm,mmu-400"); +IOMMU_OF_DECLARE(arm_mmu401, "arm,mmu-401"); +IOMMU_OF_DECLARE(arm_mmu500, "arm,mmu-500"); +IOMMU_OF_DECLARE(cavium_smmuv2, "cavium,smmu-v2"); MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations"); MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 79c45650f8de..1c7f926fad0e 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c@@ -1394,4 +1394,4 @@ static int __init exynos_iommu_init(void) } core_initcall(exynos_iommu_init); -IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu", NULL); +IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu");diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 8dce3a9de9d8..07b711bb4b16 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c@@ -1081,12 +1081,8 @@ static struct platform_driver ipmmu_driver = { static int __init ipmmu_init(void) { - static bool setup_done; int ret; - if (setup_done) - return 0; - ret = platform_driver_register(&ipmmu_driver); if (ret < 0) return ret;@@ -1096,7 +1092,6 @@ static int __init ipmmu_init(void) bus_set_iommu(&platform_bus_type, &ipmmu_ops); #endif - setup_done = true; return 0; }@@ -1109,16 +1104,8 @@ subsys_initcall(ipmmu_init); module_exit(ipmmu_exit); #ifdef CONFIG_IOMMU_DMA -static int __init ipmmu_vmsa_iommu_of_setup(struct device_node *np) -{ - ipmmu_init(); - return 0; -} - -IOMMU_OF_DECLARE(ipmmu_vmsa_iommu_of, "renesas,ipmmu-vmsa", - ipmmu_vmsa_iommu_of_setup); -IOMMU_OF_DECLARE(ipmmu_r8a7795_iommu_of, "renesas,ipmmu-r8a7795", - ipmmu_vmsa_iommu_of_setup); +IOMMU_OF_DECLARE(ipmmu_vmsa_iommu_of, "renesas,ipmmu-vmsa"); +IOMMU_OF_DECLARE(ipmmu_r8a7795_iommu_of, "renesas,ipmmu-r8a7795"); #endif MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU");diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index 04f4d51ffacb..a41d4251b0a9 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c@@ -856,7 +856,7 @@ static struct platform_driver msm_iommu_driver = { .remove = msm_iommu_remove, }; -static int __init msm_iommu_driver_init(void) +static int __init msm_iommu_init(void) { int ret;@@ -864,30 +864,20 @@ static int __init msm_iommu_driver_init(void) if (ret != 0) pr_err("Failed to register IOMMU driver\n"); + bus_set_iommu(&platform_bus_type, &msm_iommu_ops); + return ret; } -static void __exit msm_iommu_driver_exit(void) +static void __exit msm_iommu_exit(void) { platform_driver_unregister(&msm_iommu_driver); } -subsys_initcall(msm_iommu_driver_init); -module_exit(msm_iommu_driver_exit); - -static int __init msm_iommu_init(void) -{ - bus_set_iommu(&platform_bus_type, &msm_iommu_ops); - return 0; -} - -static int __init msm_iommu_of_setup(struct device_node *np) -{ - msm_iommu_init(); - return 0; -} +subsys_initcall(msm_iommu_init); +module_exit(msm_iommu_exit); -IOMMU_OF_DECLARE(msm_iommu_of, "qcom,apq8064-iommu", msm_iommu_of_setup); +IOMMU_OF_DECLARE(msm_iommu_of, "qcom,apq8064-iommu"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 50947ebb6d17..5c36a8b7656a 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c@@ -231,19 +231,3 @@ const struct iommu_ops *of_iommu_configure(struct device *dev, return ops; } - -static int __init of_iommu_init(void) -{ - struct device_node *np; - const struct of_device_id *match, *matches = &__iommu_of_table; - - for_each_matching_node_and_match(np, matches, &match) { - const of_iommu_init_fn init_fn = match->data; - - if (init_fn && init_fn(np)) - pr_err("Failed to initialise IOMMU %pOF\n", np); - } - - return 0; -} -postcore_initcall_sync(of_iommu_init);diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c index e07f02d00c68..65b9c99707f8 100644 --- a/drivers/iommu/qcom_iommu.c +++ b/drivers/iommu/qcom_iommu.c@@ -947,7 +947,7 @@ static void __exit qcom_iommu_exit(void) module_init(qcom_iommu_init); module_exit(qcom_iommu_exit); -IOMMU_OF_DECLARE(qcom_iommu_dev, "qcom,msm-iommu-v1", NULL); +IOMMU_OF_DECLARE(qcom_iommu_dev, "qcom,msm-iommu-v1"); MODULE_DESCRIPTION("IOMMU API for QCOM IOMMU v1 implementations"); MODULE_LICENSE("GPL v2");diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h index cddfaff4d0b7..ae03752e8e3a 100644 --- a/include/linux/of_iommu.h +++ b/include/linux/of_iommu.h@@ -34,9 +34,7 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev, extern struct of_device_id __iommu_of_table; -typedef int (*of_iommu_init_fn)(struct device_node *); - -#define IOMMU_OF_DECLARE(name, compat, fn) \ - _OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn) +#define IOMMU_OF_DECLARE(name, compat) \ + OF_DECLARE_1(iommu, name, compat, NULL) #endif /* __OF_IOMMU_H */
Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland