Commit 9662b1ba authored by Xingang Wang's avatar Xingang Wang Committed by Zheng Zengkai
Browse files

iommu: add iommu interface to set/get device configuration 

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4L735


CVE: NA

-------------------------------------------------

This introduce support to set and get device configuration in iommu
private driver. For example, when the smmu mpam configuration need to be
set in the smmu driver, these interfaces will help.

Signed-off-by: default avatarXingang Wang <wangxingang5@huawei.com>
Reviewed-by: default avatarZhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: default avatarWeilong Chen <chenweilong@huawei.com>
Acked-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 35328115

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

+18 −0
Original line number Diff line number Diff line
@@ -4081,6 +4081,22 @@ static int arm_smmu_device_domain_type(struct device *dev) 
}

#endif



static int arm_smmu_device_get_config(struct device *dev, int type, void *data)

{

	switch (type) {

	default:

		return -EINVAL;

	}

}



static int arm_smmu_device_set_config(struct device *dev, int type, void *data)

{

	switch (type) {

	default:

		return -EINVAL;

	}

}



static struct iommu_ops arm_smmu_ops = {

	.capable		= arm_smmu_capable,

	.domain_alloc		= arm_smmu_domain_alloc,
@@ -4122,6 +4138,8 @@ static struct iommu_ops arm_smmu_ops = { 
#ifdef CONFIG_SMMU_BYPASS_DEV

	.def_domain_type	= arm_smmu_device_domain_type,

#endif

	.dev_get_config		= arm_smmu_device_get_config,

	.dev_set_config		= arm_smmu_device_set_config,

	.pgsize_bitmap		= -1UL, /* Restricted during device attach */

};

drivers/iommu/iommu.c

+22 −0
Original line number Diff line number Diff line
@@ -3567,3 +3567,25 @@ u32 iommu_sva_get_pasid(struct iommu_sva *handle) 
	return ops->sva_get_pasid(handle);

}

EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);



int iommu_dev_set_config(struct device *dev, int type, void *data)

{

	const struct iommu_ops *ops = dev->bus->iommu_ops;



	if (ops && ops->dev_set_config)

		return ops->dev_set_config(dev, type, data);



	return -ENODEV;

}

EXPORT_SYMBOL_GPL(iommu_dev_set_config);



int iommu_dev_get_config(struct device *dev, int type, void *data)

{

	const struct iommu_ops *ops = dev->bus->iommu_ops;



	if (ops && ops->dev_get_config)

		return ops->dev_get_config(dev, type, data);



	return -ENODEV;

}

EXPORT_SYMBOL_GPL(iommu_dev_get_config);

include/linux/iommu.h

+18 −0
Original line number Diff line number Diff line
@@ -348,6 +348,9 @@ struct iommu_ops { 
			      dma_addr_t giova, phys_addr_t gpa, size_t size);

	void (*unbind_guest_msi)(struct iommu_domain *domain, dma_addr_t giova);



	int (*dev_get_config)(struct device *dev, int type, void *data);

	int (*dev_set_config)(struct device *dev, int type, void *data);



	unsigned long pgsize_bitmap;

	struct module *owner;

};
@@ -584,6 +587,9 @@ extern int iommu_clear_dirty_log(struct iommu_domain *domain, unsigned long iova 
				 unsigned long base_iova,

				 unsigned long bitmap_pgshift);



extern int iommu_dev_set_config(struct device *dev, int type, void *data);

extern int iommu_dev_get_config(struct device *dev, int type, void *data);



/* Window handling function prototypes */

extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,

				      phys_addr_t offset, u64 size,
@@ -1215,6 +1221,18 @@ int iommu_bind_guest_msi(struct iommu_domain *domain, 
static inline

void iommu_unbind_guest_msi(struct iommu_domain *domain, dma_addr_t giova) {}



static inline

int iommu_dev_set_config(struct device *dev, int type, void *data)

{

	return -ENODEV;

}



static inline

int iommmu_dev_get_config(struct device *dev, int type, void *data)

{

	return -ENODEV;

}



#endif /* CONFIG_IOMMU_API */



/**