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iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE() 

Hook up IOMMU_OF_DECLARE() support in case CONFIG_IOMMU_DMA
is enabled. The only current supported case for 32-bit ARM
is disabled, however for 64-bit ARM usage of OF is required.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
hifive-unleashed-5.1
Magnus Damm 2017-10-16 21:29:57 +09:00 committed by Alex Williamson
parent 5fd163416f
commit cda52fcd99
1 changed files with 41 additions and 9 deletions
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50
drivers/iommu/ipmmu-vmsa.c
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@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_iommu.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/sizes.h>
@ -962,17 +963,30 @@ static int ipmmu_probe(struct platform_device *pdev)
ipmmu_device_reset(mmu);
}
ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL,
dev_name(&pdev->dev));
if (ret)
return ret;
/*
* Register the IPMMU to the IOMMU subsystem in the following cases:
* - R-Car Gen2 IPMMU (all devices registered)
* - R-Car Gen3 IPMMU (leaf devices only - skip root IPMMU-MM device)
*/
if (!mmu->features->has_cache_leaf_nodes || !ipmmu_is_root(mmu)) {
ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL,
dev_name(&pdev->dev));
if (ret)
return ret;
iommu_device_set_ops(&mmu->iommu, &ipmmu_ops);
iommu_device_set_fwnode(&mmu->iommu, &pdev->dev.of_node->fwnode);
iommu_device_set_ops(&mmu->iommu, &ipmmu_ops);
iommu_device_set_fwnode(&mmu->iommu,
&pdev->dev.of_node->fwnode);
ret = iommu_device_register(&mmu->iommu);
if (ret)
return ret;
ret = iommu_device_register(&mmu->iommu);
if (ret)
return ret;
#if defined(CONFIG_IOMMU_DMA)
if (!iommu_present(&platform_bus_type))
bus_set_iommu(&platform_bus_type, &ipmmu_ops);
#endif
}
/*
* We can't create the ARM mapping here as it requires the bus to have
@ -1010,15 +1024,22 @@ 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;
#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
if (!iommu_present(&platform_bus_type))
bus_set_iommu(&platform_bus_type, &ipmmu_ops);
#endif
setup_done = true;
return 0;
}
@ -1030,6 +1051,17 @@ static void __exit ipmmu_exit(void)
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);
#endif
MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU");
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_LICENSE("GPL v2");