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iommu/amd: Add iommuv2 flag to struct amd_iommu 

In mixed IOMMU setups this flag inidicates whether an IOMMU
supports the v2 features or not. This patch also adds a
global flag together with a function to query that flag from
other code. The flag shows if at least one IOMMUv2 is in the
system.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2011-11-28 15:11:02 +01:00
parent cbc33a9085
commit 400a28a05f
3 changed files with 23 additions and 0 deletions
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15
drivers/iommu/amd_iommu_init.c
View File

@ -25,6 +25,7 @@
#include <linux/interrupt.h>
#include <linux/msi.h>
#include <linux/amd-iommu.h>
#include <linux/export.h>
#include <asm/pci-direct.h>
#include <asm/iommu.h>
#include <asm/gart.h>
@ -143,6 +144,8 @@ bool amd_iommu_iotlb_sup __read_mostly = true;
u32 amd_iommu_max_pasids __read_mostly = ~0;
bool amd_iommu_v2_present __read_mostly;
/*
* The ACPI table parsing functions set this variable on an error
*/
@ -760,6 +763,12 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu)
amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids);
}
if (iommu_feature(iommu, FEATURE_GT) &&
iommu_feature(iommu, FEATURE_PPR)) {
iommu->is_iommu_v2 = true;
amd_iommu_v2_present = true;
}
if (!is_rd890_iommu(iommu->dev))
return;
@ -1645,3 +1654,9 @@ IOMMU_INIT_FINISH(amd_iommu_detect,
gart_iommu_hole_init,
0,
0);
bool amd_iommu_v2_supported(void)
{
return amd_iommu_v2_present;
}
EXPORT_SYMBOL(amd_iommu_v2_supported);

3
drivers/iommu/amd_iommu_proto.h
View File

@ -31,6 +31,9 @@ extern int amd_iommu_init_devices(void);
extern void amd_iommu_uninit_devices(void);
extern void amd_iommu_init_notifier(void);
extern void amd_iommu_init_api(void);
extern bool amd_iommu_v2_supported(void);
#ifndef CONFIG_AMD_IOMMU_STATS
static inline void amd_iommu_stats_init(void) { }

5
drivers/iommu/amd_iommu_types.h
View File

@ -414,6 +414,9 @@ struct amd_iommu {
/* Extended features */
u64 features;
/* IOMMUv2 */
bool is_iommu_v2;
/*
* Capability pointer. There could be more than one IOMMU per PCI
* device function if there are more than one AMD IOMMU capability
@ -570,6 +573,8 @@ extern bool amd_iommu_unmap_flush;
/* Smallest number of PASIDs supported by any IOMMU in the system */
extern u32 amd_iommu_max_pasids;
extern bool amd_iommu_v2_present;
/* takes bus and device/function and returns the device id
* FIXME: should that be in generic PCI code? */
static inline u16 calc_devid(u8 bus, u8 devfn)