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authorJoerg Roedel2008-06-26 21:27:46 +0200
committerIngo Molnar2008-06-27 10:12:11 +0200
commit3566b7786afd7c14c62726f359df3c827054670b (patch)
tree0d7f9e184ebcfc4b589ceb8b78cca0f6abe091a5 /arch/x86/kernel/amd_iommu_init.c
parentx86, AMD IOMMU: add command buffer (de-)allocation (diff)
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x86, AMD IOMMU: add device table initialization functions
This patch adds functions necessary to initialize the device table from the ACPI definitions. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: Sebastian.Biemueller@amd.com Cc: robert.richter@amd.com Cc: joro@8bytes.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
-rw-r--r--arch/x86/kernel/amd_iommu_init.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index c2be3adee877..4c37abb3435b 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -308,3 +308,48 @@ static void __init free_command_buffer(struct amd_iommu *iommu)
get_order(CMD_BUFFER_SIZE));
}
+static void set_dev_entry_bit(u16 devid, u8 bit)
+{
+ int i = (bit >> 5) & 0x07;
+ int _bit = bit & 0x1f;
+
+ amd_iommu_dev_table[devid].data[i] |= (1 << _bit);
+}
+
+static void __init set_dev_entry_from_acpi(u16 devid, u32 flags, u32 ext_flags)
+{
+ if (flags & ACPI_DEVFLAG_INITPASS)
+ set_dev_entry_bit(devid, DEV_ENTRY_INIT_PASS);
+ if (flags & ACPI_DEVFLAG_EXTINT)
+ set_dev_entry_bit(devid, DEV_ENTRY_EINT_PASS);
+ if (flags & ACPI_DEVFLAG_NMI)
+ set_dev_entry_bit(devid, DEV_ENTRY_NMI_PASS);
+ if (flags & ACPI_DEVFLAG_SYSMGT1)
+ set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1);
+ if (flags & ACPI_DEVFLAG_SYSMGT2)
+ set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2);
+ if (flags & ACPI_DEVFLAG_LINT0)
+ set_dev_entry_bit(devid, DEV_ENTRY_LINT0_PASS);
+ if (flags & ACPI_DEVFLAG_LINT1)
+ set_dev_entry_bit(devid, DEV_ENTRY_LINT1_PASS);
+}
+
+static void __init set_iommu_for_device(struct amd_iommu *iommu, u16 devid)
+{
+ amd_iommu_rlookup_table[devid] = iommu;
+}
+
+static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
+{
+ struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
+
+ if (!(m->flags & IVMD_FLAG_EXCL_RANGE))
+ return;
+
+ if (iommu) {
+ set_dev_entry_bit(m->devid, DEV_ENTRY_EX);
+ iommu->exclusion_start = m->range_start;
+ iommu->exclusion_length = m->range_length;
+ }
+}
+