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x86, AMD IOMMU: clue initialization code together

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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>
This commit is contained in:
Joerg Roedel 2008-06-26 21:27:50 +02:00 committed by Ingo Molnar
parent be2a022c0d
commit fe74c9cf39
1 changed files with 126 additions and 0 deletions
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126
arch/x86/kernel/amd_iommu_init.c
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@ -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;
}