Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0ea2c422 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

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: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 05152a04

drivers/iommu/amd_iommu_init.c

+16 −0
Original line number Diff line number Diff line
@@ -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);

drivers/iommu/amd_iommu_types.h

+9 −0
Original line number Diff line number Diff line
@@ -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;