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authorJoerg Roedel <joerg.roedel@amd.com>2009-09-03 15:28:33 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2009-09-03 15:41:34 +0200
commite394d72aa8b319211b8f947d151d9d50b0fde842 (patch)
tree84cea0138c4b0ec1886d4171521007f8ef6543eb /arch/x86/kernel/amd_iommu.c
parent945b4ac44e5700acd3d974c176c8ace34b4d2e8e (diff)
x86/amd-iommu: Introduce function for iommu-local domain flush
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>
Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
-rw-r--r--arch/x86/kernel/amd_iommu.c49
1 files changed, 33 insertions, 16 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index e62b35f5df1..64cc582feb9 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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
- * on every IOMMU in the system
+ * This function flushes one domain on one IOMMU
*/
-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;
-
- INC_STATS_COUNTER(domain_flush_all);
+ unsigned long flags;
__iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
domid, 1, 1);
- for_each_iommu(iommu) {
- spin_lock_irqsave(&iommu->lock, flags);
- __iommu_queue_command(iommu, &cmd);
- __iommu_completion_wait(iommu);
- __iommu_wait_for_completion(iommu);
- spin_unlock_irqrestore(&iommu->lock, flags);
- }
+ spin_lock_irqsave(&iommu->lock, flags);
+ __iommu_queue_command(iommu, &cmd);
+ __iommu_completion_wait(iommu);
+ __iommu_wait_for_completion(iommu);
+ 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;
for (i = 1; i < MAX_DOMAIN_ID; ++i) {
if (!test_bit(i, amd_iommu_pd_alloc_bitmap))
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)