From: Vasant Hegde <vasant.hegde@amd.com>
Date: Wed, 6 Jul 2022 17:08:02 +0530
Subject: iommu/amd: Introduce per PCI segment alias table size
Git-commit: 74ce42a9ab7a245c293c58a4cb964ad285e8fb2e
Patch-mainline: v6.0-rc1
References: bsc#1205701

It will replace global "alias_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/20220706113825.25582-13-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/amd_iommu_types.h | 3 +++
 drivers/iommu/amd/init.c            | 5 +++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h
index 1dbe9c7f973d..8638b1107dd2 100644
--- a/drivers/iommu/amd/amd_iommu_types.h
+++ b/drivers/iommu/amd/amd_iommu_types.h
@@ -558,6 +558,9 @@ struct amd_iommu_pci_seg {
 	/* Size of the device table */
 	u32 dev_table_size;
 
+	/* Size of the alias table */
+	u32 alias_table_size;
+
 	/*
 	 * device table virtual address
 	 *
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 2950184d5540..b878a50e856d 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -712,7 +712,7 @@ static int __init alloc_alias_table(struct amd_iommu_pci_seg *pci_seg)
 	int i;
 
 	pci_seg->alias_table = (void *)__get_free_pages(GFP_KERNEL,
-						    get_order(alias_table_size));
+					get_order(pci_seg->alias_table_size));
 	if (!pci_seg->alias_table)
 		return -ENOMEM;
 
@@ -728,7 +728,7 @@ static int __init alloc_alias_table(struct amd_iommu_pci_seg *pci_seg)
 static void __init free_alias_table(struct amd_iommu_pci_seg *pci_seg)
 {
 	free_pages((unsigned long)pci_seg->alias_table,
-		   get_order(alias_table_size));
+		   get_order(pci_seg->alias_table_size));
 	pci_seg->alias_table = NULL;
 }
 
@@ -1583,6 +1583,7 @@ 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->alias_table_size   = tbl_size(ALIAS_TABLE_ENTRY_SIZE);
 
 	pci_seg->id = id;
 	init_llist_head(&pci_seg->dev_data_list);