unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2012-01-26 19:40:53 +01:00
parent 0cd76dd13b
commit 0ff64f80e0
3 changed files with 28 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/iommu/amd_iommu.c
View file

@ -3069,6 +3069,10 @@ static int amd_iommu_domain_init(struct iommu_domain *dom)
dom->priv = domain; dom->priv = domain;
dom->geometry.aperture_start = 0;
dom->geometry.aperture_end = ~0ULL;
dom->geometry.force_aperture = true;
return 0; return 0;
out_free: out_free:

19
drivers/iommu/iommu.c
View file

@ -348,10 +348,23 @@ EXPORT_SYMBOL_GPL(iommu_device_group);
int iommu_domain_get_attr(struct iommu_domain *domain, int iommu_domain_get_attr(struct iommu_domain *domain,
enum iommu_attr attr, void *data) enum iommu_attr attr, void *data)
{ {
if (!domain->ops->domain_get_attr) struct iommu_domain_geometry *geometry;
return -EINVAL; int ret = 0;
return domain->ops->domain_get_attr(domain, attr, data); switch (attr) {
case DOMAIN_ATTR_GEOMETRY:
geometry = data;
*geometry = domain->geometry;
break;
default:
if (!domain->ops->domain_get_attr)
return -EINVAL;
ret = domain->ops->domain_get_attr(domain, attr, data);
}
return ret;
} }
EXPORT_SYMBOL_GPL(iommu_domain_get_attr); EXPORT_SYMBOL_GPL(iommu_domain_get_attr);

8
include/linux/iommu.h
View file

@ -37,11 +37,18 @@ struct iommu_domain;
typedef int (*iommu_fault_handler_t)(struct iommu_domain *, typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
struct device *, unsigned long, int, void *); 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_domain {
struct iommu_ops *ops; struct iommu_ops *ops;
void *priv; void *priv;
iommu_fault_handler_t handler; iommu_fault_handler_t handler;
void *handler_token; void *handler_token;
struct iommu_domain_geometry geometry;
}; };
#define IOMMU_CAP_CACHE_COHERENCY 0x1 #define IOMMU_CAP_CACHE_COHERENCY 0x1
@ -49,6 +56,7 @@ struct iommu_domain {
enum iommu_attr { enum iommu_attr {
DOMAIN_ATTR_MAX, DOMAIN_ATTR_MAX,
DOMAIN_ATTR_GEOMETRY,
}; };
#ifdef CONFIG_IOMMU_API #ifdef CONFIG_IOMMU_API