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| author | Joerg Roedel <joerg.roedel@amd.com> | 2012-06-15 18:05:20 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2012-09-28 17:30:04 +0200 |
| commit | 0ea2c422bc8da99d14baa46d4789861a4f8d4ec0 (patch) | |
| tree | da722904779083287e209324b77d9b80235d2348 /drivers/iommu | |
| parent | iommu/amd: Add slab-cache for irq remapping tables (diff) | |
| download | linux-0ea2c422bc8da99d14baa46d4789861a4f8d4ec0.tar.xz linux-0ea2c422bc8da99d14baa46d4789861a4f8d4ec0.zip | |
iommu/amd: Allocate data structures to keep track of irq remapping tables
To easily map device ids to interrupt remapping table
entries a new lookup table is necessary.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 16 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_types.h | 9 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 073ed5d1e053..2d923fe7c2a1 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -184,6 +184,12 @@ u16 *amd_iommu_alias_table; struct amd_iommu **amd_iommu_rlookup_table; /* + * This table is used to find the irq remapping table for a given device id + * quickly. + */ +struct irq_remap_table **irq_lookup_table; + +/* * AMD IOMMU allows up to 2^16 differend protection domains. This is a bitmap * to know which ones are already in use. */ @@ -1532,9 +1538,13 @@ static struct syscore_ops amd_iommu_syscore_ops = { static void __init free_on_init_error(void) { + free_pages((unsigned long)irq_lookup_table, + get_order(rlookup_table_size)); + if (amd_iommu_irq_cache) { kmem_cache_destroy(amd_iommu_irq_cache); amd_iommu_irq_cache = NULL; + } amd_iommu_uninit_devices(); @@ -1687,6 +1697,12 @@ static int __init early_amd_iommu_init(void) 0, NULL); if (!amd_iommu_irq_cache) goto out; + + irq_lookup_table = (void *)__get_free_pages( + GFP_KERNEL | __GFP_ZERO, + get_order(rlookup_table_size)); + if (!irq_lookup_table) + goto out; } ret = init_memory_definitions(ivrs_base); diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index 953cea80daa7..1a7d48078d3f 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -175,6 +175,7 @@ #define DEV_ENTRY_EX 0x67 #define DEV_ENTRY_SYSMGT1 0x68 #define DEV_ENTRY_SYSMGT2 0x69 +#define DEV_ENTRY_IRQ_TBL_EN 0x80 #define DEV_ENTRY_INIT_PASS 0xb8 #define DEV_ENTRY_EINT_PASS 0xb9 #define DEV_ENTRY_NMI_PASS 0xba @@ -337,6 +338,14 @@ extern bool amd_iommu_iotlb_sup; #define MAX_IRQS_PER_TABLE 256 #define IRQ_TABLE_ALIGNMENT 128 +struct irq_remap_table { + spinlock_t lock; + unsigned min_index; + u32 *table; +}; + +extern struct irq_remap_table **irq_lookup_table; + /* Interrupt remapping feature used? */ extern bool amd_iommu_irq_remap; |