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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>
This commit is contained in:
Joerg Roedel 2012-06-15 18:05:20 +02:00
parent 05152a0494
commit 0ea2c422bc
2 changed files with 25 additions and 0 deletions
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16
drivers/iommu/amd_iommu_init.c
View File

@ -183,6 +183,12 @@ 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);

9
drivers/iommu/amd_iommu_types.h
View File

@ -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;