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>

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 c2be3adee87..4c37abb3435 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;
+        }
+}
+