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Message-Id: <e272d3f5faf1db917f294a549277482ee0dab9d4.1650890638.git.robin.murphy@arm.com>
Date: Thu, 28 Apr 2022 14:18:15 +0100
From: Robin Murphy <robin.murphy@....com>
To: joro@...tes.org, will@...nel.org
Cc: iommu@...ts.linux-foundation.org, sven@...npeter.dev,
robdclark@...il.com, m.szyprowski@...sung.com,
baolu.lu@...ux.intel.com, yong.wu@...iatek.com,
mjrosato@...ux.ibm.com, gerald.schaefer@...ux.ibm.com,
zhang.lyra@...il.com, thierry.reding@...il.com, vdumpa@...dia.com,
jean-philippe@...aro.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 14/14] iommu: Clean up bus_set_iommu()
Clean up the remaining trivial bus_set_iommu() callsites along
with the implementation. Now drivers only have to know and care
about iommu_device instances, phew!
Signed-off-by: Robin Murphy <robin.murphy@....com>
---
drivers/iommu/arm/arm-smmu/qcom_iommu.c | 4 ----
drivers/iommu/fsl_pamu_domain.c | 4 ----
drivers/iommu/intel/iommu.c | 1 -
drivers/iommu/iommu.c | 24 ------------------------
drivers/iommu/msm_iommu.c | 2 --
drivers/iommu/rockchip-iommu.c | 2 --
drivers/iommu/s390-iommu.c | 6 ------
drivers/iommu/sprd-iommu.c | 5 -----
drivers/iommu/sun50i-iommu.c | 2 --
include/linux/iommu.h | 1 -
10 files changed, 51 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index 4c077c38fbd6..80af00f468b4 100644
--- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c
+++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
@@ -845,8 +845,6 @@ static int qcom_iommu_device_probe(struct platform_device *pdev)
goto err_pm_disable;
}
- bus_set_iommu(&platform_bus_type, &qcom_iommu_ops);
-
if (qcom_iommu->local_base) {
pm_runtime_get_sync(dev);
writel_relaxed(0xffffffff, qcom_iommu->local_base + SMMU_INTR_SEL_NS);
@@ -864,8 +862,6 @@ static int qcom_iommu_device_remove(struct platform_device *pdev)
{
struct qcom_iommu_dev *qcom_iommu = platform_get_drvdata(pdev);
- bus_set_iommu(&platform_bus_type, NULL);
-
pm_runtime_force_suspend(&pdev->dev);
platform_set_drvdata(pdev, NULL);
iommu_device_sysfs_remove(&qcom_iommu->iommu);
diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 69a4a62dc3b9..7274f86b2bc4 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -480,11 +480,7 @@ int __init pamu_domain_init(void)
if (ret) {
iommu_device_sysfs_remove(&pamu_iommu);
pr_err("Can't register iommu device\n");
- return ret;
}
- bus_set_iommu(&platform_bus_type, &fsl_pamu_ops);
- bus_set_iommu(&pci_bus_type, &fsl_pamu_ops);
-
return ret;
}
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 9507b64fdf6b..e0a31fa6a70c 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4178,7 +4178,6 @@ int __init intel_iommu_init(void)
}
up_read(&dmar_global_lock);
- bus_set_iommu(&pci_bus_type, &intel_iommu_ops);
if (si_domain && !hw_pass_through)
register_memory_notifier(&intel_iommu_memory_nb);
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index c89af4dc54c2..5f10e7ad04b0 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1887,30 +1887,6 @@ static int iommu_bus_init(struct bus_type *bus)
return err;
}
-/**
- * bus_set_iommu - set iommu-callbacks for the bus
- * @bus: bus.
- * @ops: the callbacks provided by the iommu-driver
- *
- * This function is called by an iommu driver to set the iommu methods
- * used for a particular bus. Drivers for devices on that bus can use
- * the iommu-api after these ops are registered.
- * This special function is needed because IOMMUs are usually devices on
- * the bus itself, so the iommu drivers are not initialized when the bus
- * is set up. With this function the iommu-driver can set the iommu-ops
- * afterwards.
- */
-int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops)
-{
- if (bus->iommu_ops && ops && bus->iommu_ops != ops)
- return -EBUSY;
-
- bus->iommu_ops = ops;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(bus_set_iommu);
-
bool iommu_present(struct bus_type *bus)
{
return bus->iommu_ops != NULL;
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index 50f57624610f..5b89fb16feb8 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -789,8 +789,6 @@ static int msm_iommu_probe(struct platform_device *pdev)
goto fail;
}
- bus_set_iommu(&platform_bus_type, &msm_iommu_ops);
-
pr_info("device mapped at %p, irq %d with %d ctx banks\n",
iommu->base, iommu->irq, iommu->ncb);
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index ab57c4b8fade..a3fc59b814ab 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -1300,8 +1300,6 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (!dma_dev)
dma_dev = &pdev->dev;
- bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
-
pm_runtime_enable(dev);
for (i = 0; i < iommu->num_irq; i++) {
diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
index 3833e86c6e7b..5f5f4bd91e6f 100644
--- a/drivers/iommu/s390-iommu.c
+++ b/drivers/iommu/s390-iommu.c
@@ -376,9 +376,3 @@ static const struct iommu_ops s390_iommu_ops = {
.free = s390_domain_free,
}
};
-
-static int __init s390_iommu_init(void)
-{
- return bus_set_iommu(&pci_bus_type, &s390_iommu_ops);
-}
-subsys_initcall(s390_iommu_init);
diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c
index bd409bab6286..6770e6a72283 100644
--- a/drivers/iommu/sprd-iommu.c
+++ b/drivers/iommu/sprd-iommu.c
@@ -507,9 +507,6 @@ static int sprd_iommu_probe(struct platform_device *pdev)
if (ret)
goto remove_sysfs;
- if (!iommu_present(&platform_bus_type))
- bus_set_iommu(&platform_bus_type, &sprd_iommu_ops);
-
ret = sprd_iommu_clk_enable(sdev);
if (ret)
goto unregister_iommu;
@@ -545,8 +542,6 @@ static int sprd_iommu_remove(struct platform_device *pdev)
iommu_group_put(sdev->group);
sdev->group = NULL;
- bus_set_iommu(&platform_bus_type, NULL);
-
platform_set_drvdata(pdev, NULL);
iommu_device_sysfs_remove(&sdev->iommu);
iommu_device_unregister(&sdev->iommu);
diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c
index c54ab477b8fd..e104543b78d9 100644
--- a/drivers/iommu/sun50i-iommu.c
+++ b/drivers/iommu/sun50i-iommu.c
@@ -968,8 +968,6 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
if (ret < 0)
goto err_unregister;
- bus_set_iommu(&platform_bus_type, &sun50i_iommu_ops);
-
return 0;
err_unregister:
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 4123693ae319..17be860a3194 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -416,7 +416,6 @@ static inline const struct iommu_ops *dev_iommu_ops(struct device *dev)
#define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
#define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
-extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
extern int bus_iommu_probe(struct bus_type *bus);
extern bool iommu_present(struct bus_type *bus);
extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap);
--
2.35.3.dirty
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