From: Vasant Hegde <vasant.hegde@amd.com>
Date: Wed, 6 Jul 2022 17:08:04 +0530
Subject: iommu/amd: Convert to use per PCI segment irq_lookup_table
Git-commit: 0217ed5a946b61cca3a608d1ba9a422f8f85baf6
Patch-mainline: v6.0-rc1
References: bsc#1205701
Then, remove the global 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/20220706113825.25582-15-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/amd/amd_iommu_types.h | 2 --
drivers/iommu/amd/init.c | 19 -------------------
drivers/iommu/amd/iommu.c | 36 +++++++++++++++++++++++-------------
3 files changed, 23 insertions(+), 34 deletions(-)
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h
index 8d2d5fbdb57f..ca1a3d55cc83 100644
--- a/drivers/iommu/amd/amd_iommu_types.h
+++ b/drivers/iommu/amd/amd_iommu_types.h
@@ -445,8 +445,6 @@ struct irq_remap_table {
u32 *table;
};
-extern struct irq_remap_table **irq_lookup_table;
-
/* Interrupt remapping feature used? */
extern bool amd_iommu_irq_remap;
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 2f1cdc8bd24c..a60bb6c5a6da 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -206,12 +206,6 @@ 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 different protection domains. This is a bitmap
* to know which ones are already in use.
@@ -2789,11 +2783,6 @@ static struct syscore_ops amd_iommu_syscore_ops = {
static void __init free_iommu_resources(void)
{
- kmemleak_free(irq_lookup_table);
- free_pages((unsigned long)irq_lookup_table,
- get_order(rlookup_table_size));
- irq_lookup_table = NULL;
-
kmem_cache_destroy(amd_iommu_irq_cache);
amd_iommu_irq_cache = NULL;
@@ -3014,14 +3003,6 @@ static int __init early_amd_iommu_init(void)
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));
- kmemleak_alloc(irq_lookup_table, rlookup_table_size,
- 1, GFP_KERNEL);
- if (!irq_lookup_table)
- goto out;
}
ret = init_memory_definitions(ivrs_base);
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 53ccee57a7a0..cfecd072e7a6 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2732,16 +2732,18 @@ static void set_dte_irq_entry(u16 devid, struct irq_remap_table *table)
amd_iommu_dev_table[devid].data[2] = dte;
}
-static struct irq_remap_table *get_irq_table(u16 devid)
+static struct irq_remap_table *get_irq_table(struct amd_iommu *iommu, u16 devid)
{
struct irq_remap_table *table;
+ struct amd_iommu_pci_seg *pci_seg = iommu->pci_seg;
if (WARN_ONCE(!amd_iommu_rlookup_table[devid],
"%s: no iommu for devid %x\n", __func__, devid))
return NULL;
- table = irq_lookup_table[devid];
- if (WARN_ONCE(!table, "%s: no table for devid %x\n", __func__, devid))
+ table = pci_seg->irq_lookup_table[devid];
+ if (WARN_ONCE(!table, "%s: no table for devid %x:%x\n",
+ __func__, pci_seg->id, devid))
return NULL;
return table;
@@ -2774,7 +2776,9 @@ static struct irq_remap_table *__alloc_irq_table(void)
static void set_remap_table_entry(struct amd_iommu *iommu, u16 devid,
struct irq_remap_table *table)
{
- irq_lookup_table[devid] = table;
+ struct amd_iommu_pci_seg *pci_seg = iommu->pci_seg;
+
+ pci_seg->irq_lookup_table[devid] = table;
set_dte_irq_entry(devid, table);
iommu_flush_dte(iommu, devid);
}
@@ -2783,8 +2787,14 @@ static int set_remap_table_entry_alias(struct pci_dev *pdev, u16 alias,
void *data)
{
struct irq_remap_table *table = data;
+ struct amd_iommu_pci_seg *pci_seg;
+ struct amd_iommu *iommu = rlookup_amd_iommu(&pdev->dev);
- irq_lookup_table[alias] = table;
+ if (!iommu)
+ return -EINVAL;
+
+ pci_seg = iommu->pci_seg;
+ pci_seg->irq_lookup_table[alias] = table;
set_dte_irq_entry(alias, table);
iommu_flush_dte(amd_iommu_rlookup_table[alias], alias);
@@ -2808,12 +2818,12 @@ static struct irq_remap_table *alloc_irq_table(u16 devid, struct pci_dev *pdev)
goto out_unlock;
pci_seg = iommu->pci_seg;
- table = irq_lookup_table[devid];
+ table = pci_seg->irq_lookup_table[devid];
if (table)
goto out_unlock;
alias = pci_seg->alias_table[devid];
- table = irq_lookup_table[alias];
+ table = pci_seg->irq_lookup_table[alias];
if (table) {
set_remap_table_entry(iommu, devid, table);
goto out_wait;
@@ -2827,11 +2837,11 @@ static struct irq_remap_table *alloc_irq_table(u16 devid, struct pci_dev *pdev)
spin_lock_irqsave(&iommu_table_lock, flags);
- table = irq_lookup_table[devid];
+ table = pci_seg->irq_lookup_table[devid];
if (table)
goto out_unlock;
- table = irq_lookup_table[alias];
+ table = pci_seg->irq_lookup_table[alias];
if (table) {
set_remap_table_entry(iommu, devid, table);
goto out_wait;
@@ -2925,7 +2935,7 @@ static int modify_irte_ga(u16 devid, int index, struct irte_ga *irte,
if (iommu == NULL)
return -EINVAL;
- table = get_irq_table(devid);
+ table = get_irq_table(iommu, devid);
if (!table)
return -ENOMEM;
@@ -2966,7 +2976,7 @@ static int modify_irte(u16 devid, int index, union irte *irte)
if (iommu == NULL)
return -EINVAL;
- table = get_irq_table(devid);
+ table = get_irq_table(iommu, devid);
if (!table)
return -ENOMEM;
@@ -2990,7 +3000,7 @@ static void free_irte(u16 devid, int index)
if (iommu == NULL)
return;
- table = get_irq_table(devid);
+ table = get_irq_table(iommu, devid);
if (!table)
return;
@@ -3625,7 +3635,7 @@ int amd_iommu_update_ga(int cpu, bool is_run, void *data)
if (!iommu)
return -ENODEV;
- table = get_irq_table(devid);
+ table = get_irq_table(iommu, devid);
if (!table)
return -ENODEV;