x86, AMD IOMMU: clue initialization code together

This patch puts the AMD IOMMU ACPI table parsing and hardware initialization
functions together to the main intialization routine.

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>

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 555fcc9..c792ddc 100644 (file)
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -643,3 +643,129 @@ static int __init init_memory_definitions(struct acpi_table_header *table)
        return 0;
 }
 
+int __init amd_iommu_init(void)
+{
+       int i, ret = 0;
+
+
+       if (amd_iommu_disable) {
+               printk(KERN_INFO "AMD IOMMU disabled by kernel command line\n");
+               return 0;
+       }
+
+       /*
+        * First parse ACPI tables to find the largest Bus/Dev/Func
+        * we need to handle. Upon this information the shared data
+        * structures for the IOMMUs in the system will be allocated
+        */
+       if (acpi_table_parse("IVRS", find_last_devid_acpi) != 0)
+               return -ENODEV;
+
+       dev_table_size     = TBL_SIZE(DEV_TABLE_ENTRY_SIZE);
+       alias_table_size   = TBL_SIZE(ALIAS_TABLE_ENTRY_SIZE);
+       rlookup_table_size = TBL_SIZE(RLOOKUP_TABLE_ENTRY_SIZE);
+
+       ret = -ENOMEM;
+
+       /* Device table - directly used by all IOMMUs */
+       amd_iommu_dev_table = (void *)__get_free_pages(GFP_KERNEL,
+                                     get_order(dev_table_size));
+       if (amd_iommu_dev_table == NULL)
+               goto out;
+
+       /*
+        * Alias table - map PCI Bus/Dev/Func to Bus/Dev/Func the
+        * IOMMU see for that device
+        */
+       amd_iommu_alias_table = (void *)__get_free_pages(GFP_KERNEL,
+                       get_order(alias_table_size));
+       if (amd_iommu_alias_table == NULL)
+               goto free;
+
+       /* IOMMU rlookup table - find the IOMMU for a specific device */
+       amd_iommu_rlookup_table = (void *)__get_free_pages(GFP_KERNEL,
+                       get_order(rlookup_table_size));
+       if (amd_iommu_rlookup_table == NULL)
+               goto free;
+
+       /*
+        * Protection Domain table - maps devices to protection domains
+        * This table has the same size as the rlookup_table
+        */
+       amd_iommu_pd_table = (void *)__get_free_pages(GFP_KERNEL,
+                                    get_order(rlookup_table_size));
+       if (amd_iommu_pd_table == NULL)
+               goto free;
+
+       amd_iommu_pd_alloc_bitmap = (void *)__get_free_pages(GFP_KERNEL,
+                                           get_order(MAX_DOMAIN_ID/8));
+       if (amd_iommu_pd_alloc_bitmap == NULL)
+               goto free;
+
+       /*
+        * memory is allocated now; initialize the device table with all zeroes
+        * and let all alias entries point to itself
+        */
+       memset(amd_iommu_dev_table, 0, dev_table_size);
+       for (i = 0; i < amd_iommu_last_bdf; ++i)
+               amd_iommu_alias_table[i] = i;
+
+       memset(amd_iommu_pd_table, 0, rlookup_table_size);
+       memset(amd_iommu_pd_alloc_bitmap, 0, MAX_DOMAIN_ID / 8);
+
+       /*
+        * never allocate domain 0 because its used as the non-allocated and
+        * error value placeholder
+        */
+       amd_iommu_pd_alloc_bitmap[0] = 1;
+
+       /*
+        * now the data structures are allocated and basically initialized
+        * start the real acpi table scan
+        */
+       ret = -ENODEV;
+       if (acpi_table_parse("IVRS", init_iommu_all) != 0)
+               goto free;
+
+       if (acpi_table_parse("IVRS", init_memory_definitions) != 0)
+               goto free;
+
+       printk(KERN_INFO "AMD IOMMU: aperture size is %d MB\n",
+                       (1 << (amd_iommu_aperture_order-20)));
+
+       printk(KERN_INFO "AMD IOMMU: device isolation ");
+       if (amd_iommu_isolate)
+               printk("enabled\n");
+       else
+               printk("disabled\n");
+
+out:
+       return ret;
+
+free:
+       if (amd_iommu_pd_alloc_bitmap)
+               free_pages((unsigned long)amd_iommu_pd_alloc_bitmap, 1);
+
+       if (amd_iommu_pd_table)
+               free_pages((unsigned long)amd_iommu_pd_table,
+                               get_order(rlookup_table_size));
+
+       if (amd_iommu_rlookup_table)
+               free_pages((unsigned long)amd_iommu_rlookup_table,
+                               get_order(rlookup_table_size));
+
+       if (amd_iommu_alias_table)
+               free_pages((unsigned long)amd_iommu_alias_table,
+                               get_order(alias_table_size));
+
+       if (amd_iommu_dev_table)
+               free_pages((unsigned long)amd_iommu_dev_table,
+                               get_order(dev_table_size));
+
+       free_iommu_all();
+
+       free_unity_maps();
+
+       goto out;
+}
+