leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

iommu/amd: Introduce per PCI segment irq_lookup_table

Browse Source 
This will replace global irq lookup table (irq_lookup_table).

Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20220706113825.25582-6-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2022-07-06 17:07:55 +05:30 committed by Joerg Roedel
parent eda797a277
commit 333e581bcd
2 changed files with 33 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/iommu/amd/amd_iommu_types.h
View File

@ -565,6 +565,12 @@ struct amd_iommu_pci_seg {
* device id.
*/
struct 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;
};
/*

27
drivers/iommu/amd/init.c
View File

@ -684,6 +684,26 @@ static inline void free_rlookup_table(struct amd_iommu_pci_seg *pci_seg)
pci_seg->rlookup_table = NULL;
}
static inline int __init alloc_irq_lookup_table(struct amd_iommu_pci_seg *pci_seg)
{
pci_seg->irq_lookup_table = (void *)__get_free_pages(
GFP_KERNEL | __GFP_ZERO,
get_order(rlookup_table_size));
kmemleak_alloc(pci_seg->irq_lookup_table,
rlookup_table_size, 1, GFP_KERNEL);
if (pci_seg->irq_lookup_table == NULL)
return -ENOMEM;
return 0;
}
static inline void free_irq_lookup_table(struct amd_iommu_pci_seg *pci_seg)
{
kmemleak_free(pci_seg->irq_lookup_table);
free_pages((unsigned long)pci_seg->irq_lookup_table,
get_order(rlookup_table_size));
pci_seg->irq_lookup_table = NULL;
}
/*
* Allocates the command buffer. This buffer is per AMD IOMMU. We can
@ -1535,6 +1555,7 @@ static void __init free_pci_segments(void)
for_each_pci_segment_safe(pci_seg, next) {
list_del(&pci_seg->list);
free_irq_lookup_table(pci_seg);
free_rlookup_table(pci_seg);
free_dev_table(pci_seg);
kfree(pci_seg);
@ -2900,6 +2921,7 @@ static int __init early_amd_iommu_init(void)
amd_iommu_irq_remap = check_ioapic_information();
if (amd_iommu_irq_remap) {
struct amd_iommu_pci_seg *pci_seg;
/*
* Interrupt remapping enabled, create kmem_cache for the
* remapping tables.
@ -2916,6 +2938,11 @@ static int __init early_amd_iommu_init(void)
if (!amd_iommu_irq_cache)
goto out;
for_each_pci_segment(pci_seg) {
if (alloc_irq_lookup_table(pci_seg))
goto out;
}
irq_lookup_table = (void *)__get_free_pages(
GFP_KERNEL | __GFP_ZERO,
get_order(rlookup_table_size));