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iommu/amd: Introduce per PCI segment device table size

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With multiple pci segment support, number of BDF supported by each
segment may differ. Hence introduce per segment device table size
which depends on last_bdf. This will replace global
"device_table_size" variable.

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/20220706113825.25582-12-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2022-07-06 17:08:01 +05:30 committed by Joerg Roedel
parent 307959008d
commit b5c852907e
2 changed files with 13 additions and 8 deletions
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3
drivers/iommu/amd/amd_iommu_types.h
View File

@ -555,6 +555,9 @@ struct amd_iommu_pci_seg {
/* Largest PCI device id we expect translation requests for */
u16 last_bdf;
/* Size of the device table */
u32 dev_table_size;
/*
* device table virtual address
*

18
drivers/iommu/amd/init.c
View File

@ -416,6 +416,7 @@ static void iommu_set_cwwb_range(struct amd_iommu *iommu)
static void iommu_set_device_table(struct amd_iommu *iommu)
{
u64 entry;
u32 dev_table_size = iommu->pci_seg->dev_table_size;
BUG_ON(iommu->mmio_base == NULL);
@ -652,7 +653,7 @@ static int __init find_last_devid_acpi(struct acpi_table_header *table, u16 pci_
static inline int __init alloc_dev_table(struct amd_iommu_pci_seg *pci_seg)
{
pci_seg->dev_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO | GFP_DMA32,
get_order(dev_table_size));
get_order(pci_seg->dev_table_size));
if (!pci_seg->dev_table)
return -ENOMEM;
@ -662,7 +663,7 @@ static inline int __init alloc_dev_table(struct amd_iommu_pci_seg *pci_seg)
static inline void free_dev_table(struct amd_iommu_pci_seg *pci_seg)
{
free_pages((unsigned long)pci_seg->dev_table,
get_order(dev_table_size));
get_order(pci_seg->dev_table_size));
pci_seg->dev_table = NULL;
}
@ -1035,7 +1036,7 @@ static bool __copy_device_table(struct amd_iommu *iommu)
entry = (((u64) hi) << 32) + lo;
old_devtb_size = ((entry & ~PAGE_MASK) + 1) << 12;
if (old_devtb_size != dev_table_size) {
if (old_devtb_size != pci_seg->dev_table_size) {
pr_err("The device table size of IOMMU:%d is not expected!\n",
iommu->index);
return false;
@ -1054,15 +1055,15 @@ static bool __copy_device_table(struct amd_iommu *iommu)
}
old_devtb = (cc_platform_has(CC_ATTR_HOST_MEM_ENCRYPT) && is_kdump_kernel())
? (__force void *)ioremap_encrypted(old_devtb_phys,
dev_table_size)
: memremap(old_devtb_phys, dev_table_size, MEMREMAP_WB);
pci_seg->dev_table_size)
: memremap(old_devtb_phys, pci_seg->dev_table_size, MEMREMAP_WB);
if (!old_devtb)
return false;
gfp_flag = GFP_KERNEL | __GFP_ZERO | GFP_DMA32;
pci_seg->old_dev_tbl_cpy = (void *)__get_free_pages(gfp_flag,
get_order(dev_table_size));
get_order(pci_seg->dev_table_size));
if (pci_seg->old_dev_tbl_cpy == NULL) {
pr_err("Failed to allocate memory for copying old device table!\n");
memunmap(old_devtb);
@ -1581,6 +1582,7 @@ static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id,
pci_seg->last_bdf = last_bdf;
DUMP_printk("PCI segment : 0x%0x, last bdf : 0x%04x\n", id, last_bdf);
pci_seg->dev_table_size = tbl_size(DEV_TABLE_ENTRY_SIZE);
pci_seg->id = id;
init_llist_head(&pci_seg->dev_data_list);
@ -2678,7 +2680,7 @@ static void early_enable_iommus(void)
for_each_pci_segment(pci_seg) {
if (pci_seg->old_dev_tbl_cpy != NULL) {
free_pages((unsigned long)pci_seg->old_dev_tbl_cpy,
get_order(dev_table_size));
get_order(pci_seg->dev_table_size));
pci_seg->old_dev_tbl_cpy = NULL;
}
}
@ -2692,7 +2694,7 @@ static void early_enable_iommus(void)
for_each_pci_segment(pci_seg) {
free_pages((unsigned long)pci_seg->dev_table,
get_order(dev_table_size));
get_order(pci_seg->dev_table_size));
pci_seg->dev_table = pci_seg->old_dev_tbl_cpy;
}