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author | Joerg Roedel <joerg.roedel@amd.com> | 2008-06-26 21:27:50 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-06-27 10:12:13 +0200 |
commit | fe74c9cf3985e307e9734296d08a270d510e3fb7 (patch) | |
tree | 1df43923863cc542ff6770bd8769e76cb011fa68 /arch/x86/kernel/amd_iommu_init.c | |
parent | be2a022c0dd0f630b06f83de284df53cb60a308f (diff) | |
download | op-kernel-dev-fe74c9cf3985e307e9734296d08a270d510e3fb7.zip op-kernel-dev-fe74c9cf3985e307e9734296d08a270d510e3fb7.tar.gz |
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>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
-rw-r--r-- | arch/x86/kernel/amd_iommu_init.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index 555fcc9..c792ddc 100644 --- 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; +} + |