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x86/amd-iommu: Introduce function for iommu-local domain flush

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This patch introduces a function to flush all domain tlbs
for on one given IOMMU. This is required later to reset the
command buffer on one IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2009-09-03 15:28:33 +02:00
parent 945b4ac44e
commit e394d72aa8
1 changed files with 33 additions and 16 deletions
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39
arch/x86/kernel/amd_iommu.c
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@@ -465,38 +465,55 @@ static void iommu_flush_tlb_pde(struct amd_iommu *iommu, u16 domid)
} }
/* /*
* This function is used to flush the IO/TLB for a given protection domain * This function flushes one domain on one IOMMU
* on every IOMMU in the system
*/ */
static void iommu_flush_domain(u16 domid) static void flush_domain_on_iommu(struct amd_iommu *iommu, u16 domid)
{ {
unsigned long flags;
struct amd_iommu *iommu;
struct iommu_cmd cmd; struct iommu_cmd cmd;
unsigned long flags;
INC_STATS_COUNTER(domain_flush_all);
__iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, __iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
domid, 1, 1); domid, 1, 1);
for_each_iommu(iommu) {
spin_lock_irqsave(&iommu->lock, flags); spin_lock_irqsave(&iommu->lock, flags);
__iommu_queue_command(iommu, &cmd); __iommu_queue_command(iommu, &cmd);
__iommu_completion_wait(iommu); __iommu_completion_wait(iommu);
__iommu_wait_for_completion(iommu); __iommu_wait_for_completion(iommu);
spin_unlock_irqrestore(&iommu->lock, flags); spin_unlock_irqrestore(&iommu->lock, flags);
}
} }
void amd_iommu_flush_all_domains(void) static void flush_all_domains_on_iommu(struct amd_iommu *iommu)
{ {
int i; int i;
for (i = 1; i < MAX_DOMAIN_ID; ++i) { for (i = 1; i < MAX_DOMAIN_ID; ++i) {
if (!test_bit(i, amd_iommu_pd_alloc_bitmap)) if (!test_bit(i, amd_iommu_pd_alloc_bitmap))
continue; continue;
iommu_flush_domain(i); flush_domain_on_iommu(iommu, i);
} }
}
/*
* This function is used to flush the IO/TLB for a given protection domain
* on every IOMMU in the system
*/
static void iommu_flush_domain(u16 domid)
{
struct amd_iommu *iommu;
INC_STATS_COUNTER(domain_flush_all);
for_each_iommu(iommu)
flush_domain_on_iommu(iommu, domid);
}
void amd_iommu_flush_all_domains(void)
{
struct amd_iommu *iommu;
for_each_iommu(iommu)
flush_all_domains_on_iommu(iommu);
} }
void amd_iommu_flush_all_devices(void) void amd_iommu_flush_all_devices(void)