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Commit 0ff64f80 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute 



Implement the attribute itself and add the code for the
AMD IOMMU driver.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 0cd76dd1

drivers/iommu/amd_iommu.c

+4 −0
Original line number Diff line number Diff line
@@ -3069,6 +3069,10 @@ static int amd_iommu_domain_init(struct iommu_domain *dom) 


	dom->priv = domain;



	dom->geometry.aperture_start = 0;

	dom->geometry.aperture_end   = ~0ULL;

	dom->geometry.force_aperture = true;



	return 0;



out_free:

drivers/iommu/iommu.c

+16 −3
Original line number Diff line number Diff line
@@ -348,10 +348,23 @@ EXPORT_SYMBOL_GPL(iommu_device_group); 
int iommu_domain_get_attr(struct iommu_domain *domain,

			  enum iommu_attr attr, void *data)

{

	struct iommu_domain_geometry *geometry;

	int ret = 0;



	switch (attr) {

	case DOMAIN_ATTR_GEOMETRY:

		geometry  = data;

		*geometry = domain->geometry;



		break;

	default:

		if (!domain->ops->domain_get_attr)

			return -EINVAL;



	return domain->ops->domain_get_attr(domain, attr, data);

		ret = domain->ops->domain_get_attr(domain, attr, data);

	}



	return ret;

}

EXPORT_SYMBOL_GPL(iommu_domain_get_attr);

include/linux/iommu.h

+8 −0
Original line number Diff line number Diff line
@@ -37,11 +37,18 @@ struct iommu_domain; 
typedef int (*iommu_fault_handler_t)(struct iommu_domain *,

			struct device *, unsigned long, int, void *);



struct iommu_domain_geometry {

	dma_addr_t aperture_start; /* First address that can be mapped    */

	dma_addr_t aperture_end;   /* Last address that can be mapped     */

	bool force_aperture;       /* DMA only allowed in mappable range? */

};



struct iommu_domain {

	struct iommu_ops *ops;

	void *priv;

	iommu_fault_handler_t handler;

	void *handler_token;

	struct iommu_domain_geometry geometry;

};



#define IOMMU_CAP_CACHE_COHERENCY	0x1
@@ -49,6 +56,7 @@ struct iommu_domain { 


enum iommu_attr {

	DOMAIN_ATTR_MAX,

	DOMAIN_ATTR_GEOMETRY,

};



#ifdef CONFIG_IOMMU_API